file_storage.c revision 9454a57ab5922e5cd25321cae9d1a8cbeb3e2e85
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * file_storage.c -- File-backed USB Storage Gadget, for USB development 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 479a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern * Copyright (C) 2003-2007 Alan Stern 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * All rights reserved. 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Redistribution and use in source and binary forms, with or without 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * modification, are permitted provided that the following conditions 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * are met: 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1. Redistributions of source code must retain the above copyright 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * notice, this list of conditions, and the following disclaimer, 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * without modification. 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2. Redistributions in binary form must reproduce the above copyright 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * notice, this list of conditions and the following disclaimer in the 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * documentation and/or other materials provided with the distribution. 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 3. The names of the above-listed copyright holders may not be used 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * to endorse or promote products derived from this software without 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * specific prior written permission. 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * ALTERNATIVELY, this software may be distributed under the terms of the 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * GNU General Public License ("GPL") as published by the Free Software 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Foundation, either version 2 of that License or (at your option) any 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * later version. 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The File-backed Storage Gadget acts as a USB Mass Storage device, 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * appearing to the host as a disk drive. In addition to providing an 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * example of a genuinely useful gadget driver for a USB device, it also 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * illustrates a technique of double-buffering for increased throughput. 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Last but not least, it gives an easy way to probe the behavior of the 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Mass Storage drivers in a USB host. 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Backing storage is provided by a regular file or a block device, specified 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * by the "file" module parameter. Access can be limited to read-only by 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * setting the optional "ro" module parameter. The gadget will indicate that 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it has removable media if the optional "removable" module parameter is set. 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The gadget supports the Control-Bulk (CB), Control-Bulk-Interrupt (CBI), 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and Bulk-Only (also known as Bulk-Bulk-Bulk or BBB) transports, selected 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * by the optional "transport" module parameter. It also supports the 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * following protocols: RBC (0x01), ATAPI or SFF-8020i (0x02), QIC-157 (0c03), 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * UFI (0x04), SFF-8070i (0x05), and transparent SCSI (0x06), selected by 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the optional "protocol" module parameter. In addition, the default 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Vendor ID, Product ID, and release number can be overridden. 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * There is support for multiple logical units (LUNs), each of which has 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * its own backing file. The number of LUNs can be set using the optional 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * "luns" module parameter (anywhere from 1 to 8), and the corresponding 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * files are specified using comma-separated lists for "file" and "ro". 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The default number of LUNs is taken from the number of "file" elements; 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it is 1 if "file" is not given. If "removable" is not set then a backing 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * file must be specified for each LUN. If it is set, then an unspecified 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * or empty backing filename means the LUN's medium is not loaded. 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Requirements are modest; only a bulk-in and a bulk-out endpoint are 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * needed (an interrupt-out endpoint is also needed for CBI). The memory 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * requirement amounts to two 16K buffers, size configurable by a parameter. 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Support is included for both full-speed and high-speed operation. 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 7414cd5f8e85e90c9dead2393377b9a2c23131e0ceAlan Stern * Note that the driver is slightly non-portable in that it assumes a 7514cd5f8e85e90c9dead2393377b9a2c23131e0ceAlan Stern * single memory/DMA buffer will be useable for bulk-in, bulk-out, and 7614cd5f8e85e90c9dead2393377b9a2c23131e0ceAlan Stern * interrupt-in endpoints. With most device controllers this isn't an 7714cd5f8e85e90c9dead2393377b9a2c23131e0ceAlan Stern * issue, but there may be some with hardware restrictions that prevent 7814cd5f8e85e90c9dead2393377b9a2c23131e0ceAlan Stern * a buffer from being used by more than one endpoint. 7914cd5f8e85e90c9dead2393377b9a2c23131e0ceAlan Stern * 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Module options: 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * file=filename[,filename...] 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Required if "removable" is not set, names of 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the files or block devices used for 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * backing storage 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * ro=b[,b...] Default false, booleans for read-only access 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * removable Default false, boolean for removable media 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * luns=N Default N = number of filenames, number of 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * LUNs to support 90d794ac7ae3613c2abfb678617ac7d74c8ff0099cAlan Stern * stall Default determined according to the type of 91d794ac7ae3613c2abfb678617ac7d74c8ff0099cAlan Stern * USB device controller (usually true), 92d794ac7ae3613c2abfb678617ac7d74c8ff0099cAlan Stern * boolean to permit the driver to halt 93d794ac7ae3613c2abfb678617ac7d74c8ff0099cAlan Stern * bulk endpoints 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * transport=XXX Default BBB, transport name (CB, CBI, or BBB) 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * protocol=YYY Default SCSI, protocol name (RBC, 8020 or 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * ATAPI, QIC, UFI, 8070, or SCSI; 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * also 1 - 6) 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * vendor=0xVVVV Default 0x0525 (NetChip), USB Vendor ID 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * product=0xPPPP Default 0xa4a5 (FSG), USB Product ID 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * release=0xRRRR Override the USB release number (bcdDevice) 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * buflen=N Default N=16384, buffer size used (will be 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * rounded down to a multiple of 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * PAGE_CACHE_SIZE) 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If CONFIG_USB_FILE_STORAGE_TEST is not set, only the "file", "ro", 106d794ac7ae3613c2abfb678617ac7d74c8ff0099cAlan Stern * "removable", "luns", and "stall" options are available; default values 107d794ac7ae3613c2abfb678617ac7d74c8ff0099cAlan Stern * are used for everything else. 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The pathnames of the backing files and the ro settings are available in 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the attribute files "file" and "ro" in the lun<n> subdirectory of the 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * gadget's sysfs directory. If the "removable" option is set, writing to 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * these files will simulate ejecting/loading the medium (writing an empty 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * line means eject) and adjusting a write-enable tab. Changes to the ro 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * setting are not allowed when the medium is loaded. 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This gadget driver is heavily based on "Gadget Zero" by David Brownell. 117aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern * The driver's SCSI command interface was based on the "Information 118aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern * technology - Small Computer System Interface - 2" document from 119aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern * X3T9.2 Project 375D, Revision 10L, 7-SEP-93, available at 120aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern * <http://www.t10.org/ftp/t10/drafts/s2/s2-r10l.pdf>. The single exception 121aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern * is opcode 0x23 (READ FORMAT CAPACITIES), which was based on the 122aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern * "Universal Serial Bus Mass Storage Class UFI Command Specification" 123aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern * document, Revision 1.0, December 14, 1998, available at 124aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern * <http://www.usb.org/developers/devclass_docs/usbmass-ufi10.pdf>. 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Driver Design 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The FSG driver is fairly straightforward. There is a main kernel 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * thread that handles most of the work. Interrupt routines field 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * callbacks from the controller driver: bulk- and interrupt-request 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * completion notifications, endpoint-0 events, and disconnect events. 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Completion events are passed to the main thread by wakeup calls. Many 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * ep0 requests are handled at interrupt time, but SetInterface, 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * SetConfiguration, and device reset requests are forwarded to the 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * thread in the form of "exceptions" using SIGUSR1 signals (since they 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * should interrupt any ongoing file I/O operations). 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The thread's main routine implements the standard command/data/status 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * parts of a SCSI interaction. It and its subroutines are full of tests 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for pending signals/exceptions -- all this polling is necessary since 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the kernel has no setjmp/longjmp equivalents. (Maybe this is an 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * indication that the driver really wants to be running in userspace.) 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * An important point is that so long as the thread is alive it keeps an 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * open reference to the backing file. This will prevent unmounting 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the backing file's underlying filesystem and could cause problems 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * during system shutdown, for example. To prevent such problems, the 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * thread catches INT, TERM, and KILL signals and converts them into 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * an EXIT exception. 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * In normal operation the main thread is started during the gadget's 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * fsg_bind() callback and stopped during fsg_unbind(). But it can also 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * exit when it receives a signal, and there's no point leaving the 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * gadget running when the thread is dead. So just before the thread 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * exits, it deregisters the gadget driver. This makes things a little 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * tricky: The driver is deregistered at two places, and the exiting 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * thread can indirectly call fsg_unbind() which in turn can tell the 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * thread to exit. The first problem is resolved through the use of the 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * REGISTERED atomic bitflag; the driver will only be deregistered once. 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The second problem is resolved by having fsg_unbind() check 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * fsg->state; it won't try to stop the thread if the state is already 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * FSG_STATE_TERMINATED. 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * To provide maximum throughput, the driver uses a circular pipeline of 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * buffer heads (struct fsg_buffhd). In principle the pipeline can be 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * arbitrarily long; in practice the benefits don't justify having more 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * than 2 stages (i.e., double buffering). But it helps to think of the 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * pipeline as being a long one. Each buffer head contains a bulk-in and 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * a bulk-out request pointer (since the buffer can be used for both 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * output and input -- directions always are given from the host's 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * point of view) as well as a pointer to the buffer and various state 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * variables. 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Use of the pipeline follows a simple protocol. There is a variable 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (fsg->next_buffhd_to_fill) that points to the next buffer head to use. 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * At any time that buffer head may still be in use from an earlier 1791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * request, so each buffer head has a state variable indicating whether 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it is EMPTY, FULL, or BUSY. Typical use involves waiting for the 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * buffer head to be EMPTY, filling the buffer either by file I/O or by 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB I/O (during which the buffer head is BUSY), and marking the buffer 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * head FULL when the I/O is complete. Then the buffer will be emptied 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (again possibly by USB I/O, during which it is marked BUSY) and 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * finally marked EMPTY again (possibly by a completion routine). 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * A module parameter tells the driver to avoid stalling the bulk 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * endpoints wherever the transport specification allows. This is 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * necessary for some UDCs like the SuperH, which cannot reliably clear a 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * halt on a bulk endpoint. However, under certain circumstances the 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Bulk-only specification requires a stall. In such cases the driver 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * will halt the endpoint and set a flag indicating that it should clear 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the halt in software during the next device reset. Hopefully this 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * will permit everything to work correctly. Furthermore, although the 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * specification allows the bulk-out endpoint to halt when the host sends 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * too much data, implementing this would cause an unavoidable race. 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The driver will always use the "no-stall" approach for OUT transfers. 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * One subtle point concerns sending status-stage responses for ep0 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * requests. Some of these requests, such as device reset, can involve 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * interrupting an ongoing file I/O operation, which might take an 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * arbitrarily long time. During that delay the host might give up on 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the original ep0 request and issue a new one. When that happens the 2041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * driver should not notify the host about completion of the original 2051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * request, as the host will no longer be waiting for it. So the driver 2061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * assigns to each ep0 request a unique tag, and it keeps track of the 2071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * tag value of the request associated with a long-running exception 2081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (device-reset, interface-change, or configuration-change). When the 2091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * exception handler is finished, the status-stage response is submitted 2101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * only if the current ep0 request tag is equal to the exception request 2111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * tag. Thus only the most recently received ep0 request will get a 2121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * status-stage response. 2131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Warning: This driver source file is too long. It ought to be split up 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * into a header file plus about 3 separate .c files, to handle the details 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * of the Gadget, USB Mass Storage, and SCSI protocols. 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2202e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell/* #define VERBOSE_DEBUG */ 22179a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern/* #define DUMP_MSGS */ 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/blkdev.h> 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/completion.h> 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/dcache.h> 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/delay.h> 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/device.h> 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/fcntl.h> 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/file.h> 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/fs.h> 23287c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern#include <linux/kref.h> 23322efcf4adec4262e0f49e6225f6cd070e4a85d20Alan Stern#include <linux/kthread.h> 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/limits.h> 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/rwsem.h> 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/slab.h> 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/spinlock.h> 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/string.h> 2397dfb71030f7636a0d65200158113c37764552f93Nigel Cunningham#include <linux/freezer.h> 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/utsname.h> 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2425f848137744106ee737f559454ce5adfceb38347David Brownell#include <linux/usb/ch9.h> 2439454a57ab5922e5cd25321cae9d1a8cbeb3e2e85David Brownell#include <linux/usb/gadget.h> 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "gadget_chips.h" 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define DRIVER_DESC "File-backed Storage Gadget" 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define DRIVER_NAME "g_file_storage" 25279a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern#define DRIVER_VERSION "7 August 2007" 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const char longname[] = DRIVER_DESC; 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const char shortname[] = DRIVER_NAME; 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_DESCRIPTION(DRIVER_DESC); 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_AUTHOR("Alan Stern"); 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_LICENSE("Dual BSD/GPL"); 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Thanks to NetChip Technologies for donating this product ID. 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * DO NOT REUSE THESE IDs with any other driver!! Ever!! 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Instead: allocate your own, using normal USB-IF procedures. */ 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define DRIVER_VENDOR_ID 0x0525 // NetChip 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define DRIVER_PRODUCT_ID 0xa4a5 // Linux-USB File-backed Storage Gadget 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This driver assumes self-powered hardware and has no way for users to 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * trigger remote wakeup. It uses autoconfiguration to select endpoints 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and endpoint addresses. 2731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DEBUG 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define LDBG(lun,fmt,args...) \ 28079a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern dev_dbg(&(lun)->dev , fmt , ## args) 2811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define MDBG(fmt,args...) \ 2821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_DEBUG DRIVER_NAME ": " fmt , ## args) 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define LDBG(lun,fmt,args...) \ 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds do { } while (0) 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define MDBG(fmt,args...) \ 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds do { } while (0) 2882e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell#undef VERBOSE_DEBUG 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#undef DUMP_MSGS 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* DEBUG */ 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2922e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell#ifdef VERBOSE_DEBUG 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define VLDBG LDBG 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define VLDBG(lun,fmt,args...) \ 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds do { } while (0) 2972e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell#endif /* VERBOSE_DEBUG */ 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define LERROR(lun,fmt,args...) \ 30079a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern dev_err(&(lun)->dev , fmt , ## args) 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define LWARN(lun,fmt,args...) \ 30279a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern dev_warn(&(lun)->dev , fmt , ## args) 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define LINFO(lun,fmt,args...) \ 30479a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern dev_info(&(lun)->dev , fmt , ## args) 3051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define MINFO(fmt,args...) \ 3071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_INFO DRIVER_NAME ": " fmt , ## args) 3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3092e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell#define DBG(d, fmt, args...) \ 3102e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell dev_dbg(&(d)->gadget->dev , fmt , ## args) 3112e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell#define VDBG(d, fmt, args...) \ 3122e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell dev_vdbg(&(d)->gadget->dev , fmt , ## args) 3132e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell#define ERROR(d, fmt, args...) \ 3142e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell dev_err(&(d)->gadget->dev , fmt , ## args) 3152e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell#define WARN(d, fmt, args...) \ 3162e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell dev_warn(&(d)->gadget->dev , fmt , ## args) 3172e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell#define INFO(d, fmt, args...) \ 3182e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell dev_info(&(d)->gadget->dev , fmt , ## args) 3192e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Encapsulate the module parameter settings */ 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define MAX_LUNS 8 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct { 328aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern char *file[MAX_LUNS]; 329aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern int ro[MAX_LUNS]; 3302e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell unsigned int num_filenames; 3312e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell unsigned int num_ros; 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int nluns; 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 334d794ac7ae3613c2abfb678617ac7d74c8ff0099cAlan Stern int removable; 335d794ac7ae3613c2abfb678617ac7d74c8ff0099cAlan Stern int can_stall; 336d794ac7ae3613c2abfb678617ac7d74c8ff0099cAlan Stern 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *transport_parm; 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *protocol_parm; 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned short vendor; 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned short product; 3411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned short release; 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int buflen; 3431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int transport_type; 3451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *transport_name; 3461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int protocol_type; 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *protocol_name; 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} mod_data = { // Default values 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .transport_parm = "BBB", 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .protocol_parm = "SCSI", 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .removable = 0, 353d794ac7ae3613c2abfb678617ac7d74c8ff0099cAlan Stern .can_stall = 1, 3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .vendor = DRIVER_VENDOR_ID, 3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .product = DRIVER_PRODUCT_ID, 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .release = 0xffff, // Use controller chip type 3571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .buflen = 16384, 3581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds }; 3591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 361aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Sternmodule_param_array_named(file, mod_data.file, charp, &mod_data.num_filenames, 362aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern S_IRUGO); 3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_PARM_DESC(file, "names of backing files or devices"); 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 365aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Sternmodule_param_array_named(ro, mod_data.ro, bool, &mod_data.num_ros, S_IRUGO); 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_PARM_DESC(ro, "true to force read-only"); 3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_param_named(luns, mod_data.nluns, uint, S_IRUGO); 3691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_PARM_DESC(luns, "number of LUNs"); 3701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_param_named(removable, mod_data.removable, bool, S_IRUGO); 3721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_PARM_DESC(removable, "true to simulate removable media"); 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 374d794ac7ae3613c2abfb678617ac7d74c8ff0099cAlan Sternmodule_param_named(stall, mod_data.can_stall, bool, S_IRUGO); 375d794ac7ae3613c2abfb678617ac7d74c8ff0099cAlan SternMODULE_PARM_DESC(stall, "false to prevent bulk stalls"); 376d794ac7ae3613c2abfb678617ac7d74c8ff0099cAlan Stern 3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* In the non-TEST version, only the module parameters listed above 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * are available. */ 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_FILE_STORAGE_TEST 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_param_named(transport, mod_data.transport_parm, charp, S_IRUGO); 3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_PARM_DESC(transport, "type of transport (BBB, CBI, or CB)"); 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_param_named(protocol, mod_data.protocol_parm, charp, S_IRUGO); 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_PARM_DESC(protocol, "type of protocol (RBC, 8020, QIC, UFI, " 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "8070, or SCSI)"); 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_param_named(vendor, mod_data.vendor, ushort, S_IRUGO); 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_PARM_DESC(vendor, "USB Vendor ID"); 3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_param_named(product, mod_data.product, ushort, S_IRUGO); 3931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_PARM_DESC(product, "USB Product ID"); 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_param_named(release, mod_data.release, ushort, S_IRUGO); 3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_PARM_DESC(release, "USB release number"); 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_param_named(buflen, mod_data.buflen, uint, S_IRUGO); 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_PARM_DESC(buflen, "I/O buffer size"); 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* CONFIG_USB_FILE_STORAGE_TEST */ 4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* USB protocol value = the transport method */ 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_PR_CBI 0x00 // Control/Bulk/Interrupt 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_PR_CB 0x01 // Control/Bulk w/o interrupt 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_PR_BULK 0x50 // Bulk-only 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* USB subclass value = the protocol encapsulation */ 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_SC_RBC 0x01 // Reduced Block Commands (flash) 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_SC_8020 0x02 // SFF-8020i, MMC-2, ATAPI (CD-ROM) 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_SC_QIC 0x03 // QIC-157 (tape) 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_SC_UFI 0x04 // UFI (floppy) 4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_SC_8070 0x05 // SFF-8070i (removable) 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_SC_SCSI 0x06 // Transparent SCSI 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Bulk-only data structures */ 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Command Block Wrapper */ 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct bulk_cb_wrap { 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __le32 Signature; // Contains 'USBC' 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 Tag; // Unique per command id 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __le32 DataTransferLength; // Size of the data 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 Flags; // Direction in bit 7 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 Lun; // LUN (normally 0) 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 Length; // Of the CDB, <= MAX_COMMAND_SIZE 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 CDB[16]; // Command Data Block 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_BULK_CB_WRAP_LEN 31 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_BULK_CB_SIG 0x43425355 // Spells out USBC 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_BULK_IN_FLAG 0x80 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Command Status Wrapper */ 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct bulk_cs_wrap { 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __le32 Signature; // Should = 'USBS' 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 Tag; // Same as original command 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __le32 Residue; // Amount not transferred 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 Status; // See below 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_BULK_CS_WRAP_LEN 13 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_BULK_CS_SIG 0x53425355 // Spells out 'USBS' 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_STATUS_PASS 0 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_STATUS_FAIL 1 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_STATUS_PHASE_ERROR 2 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Bulk-only class specific requests */ 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_BULK_RESET_REQUEST 0xff 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_BULK_GET_MAX_LUN_REQUEST 0xfe 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* CBI Interrupt data structure */ 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct interrupt_data { 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 bType; 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 bValue; 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define CBI_INTERRUPT_DATA_LEN 2 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* CBI Accept Device-Specific Command request */ 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define USB_CBI_ADSC_REQUEST 0x00 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define MAX_COMMAND_SIZE 16 // Length of a SCSI Command Data Block 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* SCSI commands that we recognize */ 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_FORMAT_UNIT 0x04 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_INQUIRY 0x12 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_MODE_SELECT_6 0x15 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_MODE_SELECT_10 0x55 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_MODE_SENSE_6 0x1a 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_MODE_SENSE_10 0x5a 4761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_PREVENT_ALLOW_MEDIUM_REMOVAL 0x1e 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_READ_6 0x08 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_READ_10 0x28 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_READ_12 0xa8 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_READ_CAPACITY 0x25 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_READ_FORMAT_CAPACITIES 0x23 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_RELEASE 0x17 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_REQUEST_SENSE 0x03 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_RESERVE 0x16 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_SEND_DIAGNOSTIC 0x1d 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_START_STOP_UNIT 0x1b 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_SYNCHRONIZE_CACHE 0x35 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_TEST_UNIT_READY 0x00 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_VERIFY 0x2f 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_WRITE_6 0x0a 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_WRITE_10 0x2a 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SC_WRITE_12 0xaa 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* SCSI Sense Key/Additional Sense Code/ASC Qualifier values */ 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SS_NO_SENSE 0 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SS_COMMUNICATION_FAILURE 0x040800 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SS_INVALID_COMMAND 0x052000 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SS_INVALID_FIELD_IN_CDB 0x052400 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE 0x052100 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SS_LOGICAL_UNIT_NOT_SUPPORTED 0x052500 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SS_MEDIUM_NOT_PRESENT 0x023a00 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SS_MEDIUM_REMOVAL_PREVENTED 0x055302 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SS_NOT_READY_TO_READY_TRANSITION 0x062800 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SS_RESET_OCCURRED 0x062900 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SS_SAVING_PARAMETERS_NOT_SUPPORTED 0x053900 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SS_UNRECOVERED_READ_ERROR 0x031100 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SS_WRITE_ERROR 0x030c02 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SS_WRITE_PROTECTED 0x072700 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SK(x) ((u8) ((x) >> 16)) // Sense Key byte, etc. 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define ASC(x) ((u8) ((x) >> 8)) 5121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define ASCQ(x) ((u8) (x)) 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * These definitions will permit the compiler to avoid generating code for 5191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * parts of the driver that aren't used in the non-TEST version. Even gcc 5201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * can recognize when a test of a constant expression yields a dead code 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * path. 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_FILE_STORAGE_TEST 5251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define transport_is_bbb() (mod_data.transport_type == USB_PR_BULK) 5271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define transport_is_cbi() (mod_data.transport_type == USB_PR_CBI) 5281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define protocol_is_scsi() (mod_data.protocol_type == USB_SC_SCSI) 5291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 5311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define transport_is_bbb() 1 5331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define transport_is_cbi() 0 5341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define protocol_is_scsi() 1 5351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* CONFIG_USB_FILE_STORAGE_TEST */ 5371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct lun { 5401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct file *filp; 5411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds loff_t file_length; 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds loff_t num_sectors; 5431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int ro : 1; 5451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int prevent_medium_removal : 1; 5461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int registered : 1; 5476174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern unsigned int info_valid : 1; 5481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 sense_data; 5501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 sense_data_info; 5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 unit_attention_data; 5521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct device dev; 5541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define backing_file_is_open(curlun) ((curlun)->filp != NULL) 5571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 55879a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic struct lun *dev_to_lun(struct device *dev) 5591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return container_of(dev, struct lun, dev); 5611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Big enough to hold our biggest descriptor */ 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define EP0_BUFSIZE 256 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define DELAYED_STATUS (EP0_BUFSIZE + 999) // An impossibly large value 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Number of buffers we will use. 2 is enough for double-buffering */ 5691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define NUM_BUFFERS 2 5701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsenum fsg_buffer_state { 5721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds BUF_STATE_EMPTY = 0, 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds BUF_STATE_FULL, 5741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds BUF_STATE_BUSY 5751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct fsg_buffhd { 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds void *buf; 579a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern enum fsg_buffer_state state; 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *next; 5811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The NetChip 2280 is faster, and handles some protocol faults 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * better, if we don't submit any short bulk-out read requests. 5841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * So we will record the intended request length here. */ 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int bulk_out_intended_length; 5861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_request *inreq; 588a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern int inreq_busy; 5891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_request *outreq; 590a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern int outreq_busy; 5911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsenum fsg_state { 5941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds FSG_STATE_COMMAND_PHASE = -10, // This one isn't used anywhere 5951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds FSG_STATE_DATA_PHASE, 5961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds FSG_STATE_STATUS_PHASE, 5971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds FSG_STATE_IDLE = 0, 5991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds FSG_STATE_ABORT_BULK_OUT, 6001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds FSG_STATE_RESET, 6011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds FSG_STATE_INTERFACE_CHANGE, 6021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds FSG_STATE_CONFIG_CHANGE, 6031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds FSG_STATE_DISCONNECT, 6041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds FSG_STATE_EXIT, 6051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds FSG_STATE_TERMINATED 6061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 6071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsenum data_direction { 6091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DATA_DIR_UNKNOWN = 0, 6101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DATA_DIR_FROM_HOST, 6111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DATA_DIR_TO_HOST, 6121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DATA_DIR_NONE 6131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 6141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct fsg_dev { 6161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* lock protects: state, all the req_busy's, and cbbuf_cmnd */ 6171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spinlock_t lock; 6181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_gadget *gadget; 6191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* filesem protects: backing files in use */ 6211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct rw_semaphore filesem; 6221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 62387c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern /* reference counting: wait until all LUNs are released */ 62487c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern struct kref ref; 62587c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern 6261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_ep *ep0; // Handy copy of gadget->ep0 6271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_request *ep0req; // For control responses 628a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern unsigned int ep0_req_tag; 6291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const char *ep0req_name; 6301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_request *intreq; // For interrupt responses 632a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern int intreq_busy; 6331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *intr_buffhd; 6341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int bulk_out_maxpacket; 6361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds enum fsg_state state; // For exception handling 6371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int exception_req_tag; 6381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 config, new_config; 6401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int running : 1; 6421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int bulk_in_enabled : 1; 6431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int bulk_out_enabled : 1; 6441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int intr_in_enabled : 1; 6451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int phase_error : 1; 6461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int short_packet_received : 1; 6471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int bad_lun_okay : 1; 6481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long atomic_bitflags; 6501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define REGISTERED 0 6511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define CLEAR_BULK_HALTS 1 6521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SUSPENDED 2 6531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_ep *bulk_in; 6551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_ep *bulk_out; 6561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_ep *intr_in; 6571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *next_buffhd_to_fill; 6591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *next_buffhd_to_drain; 6601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd buffhds[NUM_BUFFERS]; 6611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int thread_wakeup_needed; 6631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct completion thread_notifier; 6641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct task_struct *thread_task; 6651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int cmnd_size; 6671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 cmnd[MAX_COMMAND_SIZE]; 6681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds enum data_direction data_dir; 6691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 data_size; 6701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 data_size_from_cmnd; 6711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 tag; 6721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int lun; 6731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 residue; 6741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 usb_amount_left; 6751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The CB protocol offers no way for a host to know when a command 6771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * has completed. As a result the next command may arrive early, 6781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and we will still have to handle it. For that reason we need 6791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * a buffer to store new commands when using CB (or CBI, which 6801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * does not oblige a host to wait for command completion either). */ 6811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int cbbuf_cmnd_size; 6821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 cbbuf_cmnd[MAX_COMMAND_SIZE]; 6831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int nluns; 6851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *luns; 6861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun; 6871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 6881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldstypedef void (*fsg_routine_t)(struct fsg_dev *); 6901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 69179a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic int exception_in_progress(struct fsg_dev *fsg) 6921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 6931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (fsg->state > FSG_STATE_IDLE); 6941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 6951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 6961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Make bulk-out requests be divisible by the maxpacket size */ 69779a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic void set_bulk_out_req_length(struct fsg_dev *fsg, 6981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh, unsigned int length) 6991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int rem; 7011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->bulk_out_intended_length = length; 7031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rem = length % fsg->bulk_out_maxpacket; 7041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rem > 0) 7051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds length += fsg->bulk_out_maxpacket - rem; 7061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->outreq->length = length; 7071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct fsg_dev *the_fsg; 7101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_gadget_driver fsg_driver; 7111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void close_backing_file(struct lun *curlun); 7131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void close_all_backing_files(struct fsg_dev *fsg); 7141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 7171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef DUMP_MSGS 7191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void dump_msg(struct fsg_dev *fsg, const char *label, 7211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const u8 *buf, unsigned int length) 7221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 72379a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern if (length < 512) { 72479a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern DBG(fsg, "%s, length %u:\n", label, length); 72579a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 72679a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern 16, 1, buf, length, 0); 7271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 7281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 73079a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic void dump_cdb(struct fsg_dev *fsg) 7311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{} 7321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 7341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 73579a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic void dump_msg(struct fsg_dev *fsg, const char *label, 7361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const u8 *buf, unsigned int length) 7371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{} 7381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 73979a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern#ifdef VERBOSE_DEBUG 7401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 74179a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic void dump_cdb(struct fsg_dev *fsg) 74279a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern{ 74379a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern print_hex_dump(KERN_DEBUG, "SCSI CDB: ", DUMP_PREFIX_NONE, 74479a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern 16, 1, fsg->cmnd, fsg->cmnd_size, 0); 7451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 74779a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern#else 74879a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern 74979a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic void dump_cdb(struct fsg_dev *fsg) 75079a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern{} 75179a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern 75279a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern#endif /* VERBOSE_DEBUG */ 7531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* DUMP_MSGS */ 7541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int fsg_set_halt(struct fsg_dev *fsg, struct usb_ep *ep) 7571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const char *name; 7591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ep == fsg->bulk_in) 7611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds name = "bulk-in"; 7621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (ep == fsg->bulk_out) 7631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds name = "bulk-out"; 7641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 7651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds name = ep->name; 7661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "%s set halt\n", name); 7671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return usb_ep_set_halt(ep); 7681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 7721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 7731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Routines for unaligned data access */ 7741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 77579a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic u16 get_be16(u8 *buf) 7761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ((u16) buf[0] << 8) | ((u16) buf[1]); 7781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 78079a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic u32 get_be32(u8 *buf) 7811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return ((u32) buf[0] << 24) | ((u32) buf[1] << 16) | 7831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((u32) buf[2] << 8) | ((u32) buf[3]); 7841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 78679a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic void put_be16(u8 *buf, u16 val) 7871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[0] = val >> 8; 7891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[1] = val; 7901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 79279a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic void put_be32(u8 *buf, u32 val) 7931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[0] = val >> 24; 7951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[1] = val >> 16; 7961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[2] = val >> 8; 7971bbc169621cbe502b9143a27eb12802a0f1d43a0David Brownell buf[3] = val & 0xff; 7981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 7991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 8021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 8041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * DESCRIPTORS ... most are static, but strings and (full) configuration 8051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * descriptors are built on demand. Also the (static) config and interface 8061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * descriptors are adjusted during fsg_bind(). 8071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 8081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define STRING_MANUFACTURER 1 8091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define STRING_PRODUCT 2 8101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define STRING_SERIAL 3 8111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define STRING_CONFIG 4 8121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define STRING_INTERFACE 5 8131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* There is only one configuration. */ 8151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define CONFIG_VALUE 1 8161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_device_descriptor 8181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdevice_desc = { 8191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bLength = sizeof device_desc, 8201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bDescriptorType = USB_DT_DEVICE, 8211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bcdUSB = __constant_cpu_to_le16(0x0200), 8231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bDeviceClass = USB_CLASS_PER_INTERFACE, 8241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The next three values can be overridden by module parameters */ 8261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .idVendor = __constant_cpu_to_le16(DRIVER_VENDOR_ID), 8271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .idProduct = __constant_cpu_to_le16(DRIVER_PRODUCT_ID), 8281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bcdDevice = __constant_cpu_to_le16(0xffff), 8291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .iManufacturer = STRING_MANUFACTURER, 8311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .iProduct = STRING_PRODUCT, 8321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .iSerialNumber = STRING_SERIAL, 8331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bNumConfigurations = 1, 8341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 8351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_config_descriptor 8371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsconfig_desc = { 8381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bLength = sizeof config_desc, 8391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bDescriptorType = USB_DT_CONFIG, 8401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* wTotalLength computed by usb_gadget_config_buf() */ 8421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bNumInterfaces = 1, 8431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bConfigurationValue = CONFIG_VALUE, 8441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .iConfiguration = STRING_CONFIG, 8451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER, 8461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bMaxPower = 1, // self-powered 8471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 8481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_otg_descriptor 8501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsotg_desc = { 8511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bLength = sizeof(otg_desc), 8521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bDescriptorType = USB_DT_OTG, 8531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bmAttributes = USB_OTG_SRP, 8551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 8561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* There is only one interface. */ 8581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_interface_descriptor 8601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsintf_desc = { 8611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bLength = sizeof intf_desc, 8621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bDescriptorType = USB_DT_INTERFACE, 8631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bNumEndpoints = 2, // Adjusted during fsg_bind() 8651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bInterfaceClass = USB_CLASS_MASS_STORAGE, 8661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bInterfaceSubClass = USB_SC_SCSI, // Adjusted during fsg_bind() 8671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bInterfaceProtocol = USB_PR_BULK, // Adjusted during fsg_bind() 8681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .iInterface = STRING_INTERFACE, 8691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 8701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Three full-speed endpoint descriptors: bulk-in, bulk-out, 8721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and interrupt-in. */ 8731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_endpoint_descriptor 8751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsfs_bulk_in_desc = { 8761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bLength = USB_DT_ENDPOINT_SIZE, 8771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bDescriptorType = USB_DT_ENDPOINT, 8781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bEndpointAddress = USB_DIR_IN, 8801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bmAttributes = USB_ENDPOINT_XFER_BULK, 8811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* wMaxPacketSize set by autoconfiguration */ 8821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 8831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_endpoint_descriptor 8851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsfs_bulk_out_desc = { 8861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bLength = USB_DT_ENDPOINT_SIZE, 8871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bDescriptorType = USB_DT_ENDPOINT, 8881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bEndpointAddress = USB_DIR_OUT, 8901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bmAttributes = USB_ENDPOINT_XFER_BULK, 8911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* wMaxPacketSize set by autoconfiguration */ 8921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 8931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_endpoint_descriptor 8951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsfs_intr_in_desc = { 8961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bLength = USB_DT_ENDPOINT_SIZE, 8971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bDescriptorType = USB_DT_ENDPOINT, 8981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bEndpointAddress = USB_DIR_IN, 9001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bmAttributes = USB_ENDPOINT_XFER_INT, 9011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .wMaxPacketSize = __constant_cpu_to_le16(2), 9021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bInterval = 32, // frames -> 32 ms 9031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 9041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const struct usb_descriptor_header *fs_function[] = { 9061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (struct usb_descriptor_header *) &otg_desc, 9071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (struct usb_descriptor_header *) &intf_desc, 9081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (struct usb_descriptor_header *) &fs_bulk_in_desc, 9091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (struct usb_descriptor_header *) &fs_bulk_out_desc, 9101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (struct usb_descriptor_header *) &fs_intr_in_desc, 9111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds NULL, 9121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 9131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define FS_FUNCTION_PRE_EP_ENTRIES 2 9141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 9171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * USB 2.0 devices need to expose both high speed and full speed 9181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * descriptors, unless they only run at full speed. 9191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 9201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * That means alternate endpoint descriptors (bigger packets) 9211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and a "device qualifier" ... plus more construction options 9221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for the config descriptor. 9231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 9241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_qualifier_descriptor 9251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsdev_qualifier = { 9261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bLength = sizeof dev_qualifier, 9271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bDescriptorType = USB_DT_DEVICE_QUALIFIER, 9281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bcdUSB = __constant_cpu_to_le16(0x0200), 9301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bDeviceClass = USB_CLASS_PER_INTERFACE, 9311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bNumConfigurations = 1, 9331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 9341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_endpoint_descriptor 9361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshs_bulk_in_desc = { 9371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bLength = USB_DT_ENDPOINT_SIZE, 9381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bDescriptorType = USB_DT_ENDPOINT, 9391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* bEndpointAddress copied from fs_bulk_in_desc during fsg_bind() */ 9411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bmAttributes = USB_ENDPOINT_XFER_BULK, 9421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .wMaxPacketSize = __constant_cpu_to_le16(512), 9431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 9441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_endpoint_descriptor 9461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshs_bulk_out_desc = { 9471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bLength = USB_DT_ENDPOINT_SIZE, 9481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bDescriptorType = USB_DT_ENDPOINT, 9491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* bEndpointAddress copied from fs_bulk_out_desc during fsg_bind() */ 9511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bmAttributes = USB_ENDPOINT_XFER_BULK, 9521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .wMaxPacketSize = __constant_cpu_to_le16(512), 9531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bInterval = 1, // NAK every 1 uframe 9541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 9551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_endpoint_descriptor 9571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldshs_intr_in_desc = { 9581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bLength = USB_DT_ENDPOINT_SIZE, 9591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bDescriptorType = USB_DT_ENDPOINT, 9601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* bEndpointAddress copied from fs_intr_in_desc during fsg_bind() */ 9621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bmAttributes = USB_ENDPOINT_XFER_INT, 9631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .wMaxPacketSize = __constant_cpu_to_le16(2), 9641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bInterval = 9, // 2**(9-1) = 256 uframes -> 32 ms 9651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 9661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const struct usb_descriptor_header *hs_function[] = { 9681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (struct usb_descriptor_header *) &otg_desc, 9691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (struct usb_descriptor_header *) &intf_desc, 9701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (struct usb_descriptor_header *) &hs_bulk_in_desc, 9711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (struct usb_descriptor_header *) &hs_bulk_out_desc, 9721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (struct usb_descriptor_header *) &hs_intr_in_desc, 9731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds NULL, 9741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 9751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define HS_FUNCTION_PRE_EP_ENTRIES 2 9761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Maxpacket and other transfer characteristics vary by speed. */ 97879a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic struct usb_endpoint_descriptor * 9792e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownellep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *fs, 9802e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell struct usb_endpoint_descriptor *hs) 9812e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell{ 9822e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH) 9832e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell return hs; 9842e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell return fs; 9852e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell} 9861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* The CBI specification limits the serial string to 12 uppercase hexadecimal 9891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * characters. */ 9901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic char manufacturer[64]; 9911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic char serial[13]; 9921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 9931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Static strings, in UTF-8 (for simplicity we use only ASCII characters) */ 9941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_string strings[] = { 9951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds {STRING_MANUFACTURER, manufacturer}, 9961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds {STRING_PRODUCT, longname}, 9971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds {STRING_SERIAL, serial}, 9981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds {STRING_CONFIG, "Self-powered"}, 9991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds {STRING_INTERFACE, "Mass Storage"}, 10001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds {} 10011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 10021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_gadget_strings stringtab = { 10041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .language = 0x0409, // en-us 10051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .strings = strings, 10061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 10071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 10101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Config descriptors must agree with the code that sets configurations 10111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and with code managing interfaces and their altsettings. They must 10121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * also handle different speeds and other-speed requests. 10131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 10141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int populate_config_buf(struct usb_gadget *gadget, 10151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *buf, u8 type, unsigned index) 10161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds enum usb_device_speed speed = gadget->speed; 10181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int len; 10191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const struct usb_descriptor_header **function; 10201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (index > 0) 10221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 10231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10242e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell if (gadget_is_dualspeed(gadget) && type == USB_DT_OTHER_SPEED_CONFIG) 10251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds speed = (USB_SPEED_FULL + USB_SPEED_HIGH) - speed; 10262e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell if (gadget_is_dualspeed(gadget) && speed == USB_SPEED_HIGH) 10271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds function = hs_function; 10281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 10291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds function = fs_function; 10301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* for now, don't advertise srp-only devices */ 10322e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell if (!gadget_is_otg(gadget)) 10331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds function++; 10341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = usb_gadget_config_buf(&config_desc, buf, EP0_BUFSIZE, function); 10361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((struct usb_config_descriptor *) buf)->bDescriptorType = type; 10371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return len; 10381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 10421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* These routines may be called in process context or in_irq */ 10441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1045a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern/* Caller must hold fsg->lock */ 10461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void wakeup_thread(struct fsg_dev *fsg) 10471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Tell the main thread that something has happened */ 10491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->thread_wakeup_needed = 1; 1050a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern if (fsg->thread_task) 1051a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern wake_up_process(fsg->thread_task); 10521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void raise_exception(struct fsg_dev *fsg, enum fsg_state new_state) 10561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long flags; 10581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Do nothing if a higher-priority exception is already in progress. 10601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If a lower-or-equal priority exception is in progress, preempt it 10611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and notify the main thread by sending it a signal. */ 10621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irqsave(&fsg->lock, flags); 10631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->state <= new_state) { 10641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->exception_req_tag = fsg->ep0_req_tag; 10651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->state = new_state; 106622efcf4adec4262e0f49e6225f6cd070e4a85d20Alan Stern if (fsg->thread_task) 106722efcf4adec4262e0f49e6225f6cd070e4a85d20Alan Stern send_sig_info(SIGUSR1, SEND_SIG_FORCED, 106822efcf4adec4262e0f49e6225f6cd070e4a85d20Alan Stern fsg->thread_task); 10691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 10701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irqrestore(&fsg->lock, flags); 10711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 10751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* The disconnect callback and ep0 routines. These always run in_irq, 10771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * except that ep0_queue() is called in the main thread to acknowledge 10781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * completion of various requests: set config, set interface, and 10791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Bulk-only device reset. */ 10801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void fsg_disconnect(struct usb_gadget *gadget) 10821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_dev *fsg = get_gadget_data(gadget); 10841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "disconnect or port reset\n"); 10861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds raise_exception(fsg, FSG_STATE_DISCONNECT); 10871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 10881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int ep0_queue(struct fsg_dev *fsg) 10911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 10921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 10931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = usb_ep_queue(fsg->ep0, fsg->ep0req, GFP_ATOMIC); 10951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc != 0 && rc != -ESHUTDOWN) { 10961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 10971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We can't do much more than wait for a reset */ 10981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds WARN(fsg, "error in submission: %s --> %d\n", 10991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->ep0->name, rc); 11001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 11011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 11021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void ep0_complete(struct usb_ep *ep, struct usb_request *req) 11051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11067ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct fsg_dev *fsg = ep->driver_data; 11071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req->actual > 0) 11091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dump_msg(fsg, fsg->ep0req_name, req->buf, req->actual); 11101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req->status || req->actual != req->length) 11111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "%s --> %d, %u/%u\n", __FUNCTION__, 11121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds req->status, req->actual, req->length); 11131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req->status == -ECONNRESET) // Request was cancelled 11141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_fifo_flush(ep); 11151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req->status == 0 && req->context) 11171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((fsg_routine_t) (req->context))(fsg); 11181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 11221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Bulk and interrupt endpoint completion handlers. 11241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * These always run in_irq. */ 11251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void bulk_in_complete(struct usb_ep *ep, struct usb_request *req) 11271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11287ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct fsg_dev *fsg = ep->driver_data; 11297ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct fsg_buffhd *bh = req->context; 11301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req->status || req->actual != req->length) 11321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "%s --> %d, %u/%u\n", __FUNCTION__, 11331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds req->status, req->actual, req->length); 11341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req->status == -ECONNRESET) // Request was cancelled 11351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_fifo_flush(ep); 11361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Hold the lock while we update the request and buffer states */ 1138a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern smp_wmb(); 11391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&fsg->lock); 11401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq_busy = 0; 11411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->state = BUF_STATE_EMPTY; 11421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wakeup_thread(fsg); 1143a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern spin_unlock(&fsg->lock); 11441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void bulk_out_complete(struct usb_ep *ep, struct usb_request *req) 11471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11487ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct fsg_dev *fsg = ep->driver_data; 11497ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct fsg_buffhd *bh = req->context; 11501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dump_msg(fsg, "bulk-out", req->buf, req->actual); 11521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req->status || req->actual != bh->bulk_out_intended_length) 11531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "%s --> %d, %u/%u\n", __FUNCTION__, 11541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds req->status, req->actual, 11551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->bulk_out_intended_length); 11561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req->status == -ECONNRESET) // Request was cancelled 11571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_fifo_flush(ep); 11581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Hold the lock while we update the request and buffer states */ 1160a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern smp_wmb(); 11611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&fsg->lock); 11621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->outreq_busy = 0; 11631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->state = BUF_STATE_FULL; 11641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wakeup_thread(fsg); 1165a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern spin_unlock(&fsg->lock); 11661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_FILE_STORAGE_TEST 11701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void intr_in_complete(struct usb_ep *ep, struct usb_request *req) 11711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 11727ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct fsg_dev *fsg = ep->driver_data; 11737ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct fsg_buffhd *bh = req->context; 11741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req->status || req->actual != req->length) 11761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "%s --> %d, %u/%u\n", __FUNCTION__, 11771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds req->status, req->actual, req->length); 11781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req->status == -ECONNRESET) // Request was cancelled 11791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_fifo_flush(ep); 11801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Hold the lock while we update the request and buffer states */ 1182a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern smp_wmb(); 11831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&fsg->lock); 11841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->intreq_busy = 0; 11851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->state = BUF_STATE_EMPTY; 11861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wakeup_thread(fsg); 1187a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern spin_unlock(&fsg->lock); 11881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 11891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 11911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void intr_in_complete(struct usb_ep *ep, struct usb_request *req) 11921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{} 11931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* CONFIG_USB_FILE_STORAGE_TEST */ 11941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 11971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Ep0 class-specific handlers. These always run in_irq. */ 11991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_FILE_STORAGE_TEST 12011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void received_cbi_adsc(struct fsg_dev *fsg, struct fsg_buffhd *bh) 12021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_request *req = fsg->ep0req; 12041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds static u8 cbi_reset_cmnd[6] = { 12051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SC_SEND_DIAGNOSTIC, 4, 0xff, 0xff, 0xff, 0xff}; 12061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Error in command transfer? */ 12081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req->status || req->length != req->actual || 12091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds req->actual < 6 || req->actual > MAX_COMMAND_SIZE) { 12101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Not all controllers allow a protocol stall after 12121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * receiving control-out data, but we'll try anyway. */ 12131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg_set_halt(fsg, fsg->ep0); 12141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; // Wait for reset 12151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Is it the special reset command? */ 12181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req->actual >= sizeof cbi_reset_cmnd && 12191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcmp(req->buf, cbi_reset_cmnd, 12201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sizeof cbi_reset_cmnd) == 0) { 12211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Raise an exception to stop the current operation 12231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and reinitialize our state. */ 12241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "cbi reset request\n"); 12251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds raise_exception(fsg, FSG_STATE_RESET); 12261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 12271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, "CB[I] accept device-specific command\n"); 12301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock(&fsg->lock); 12311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Save the command for later */ 12331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->cbbuf_cmnd_size) 12341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds WARN(fsg, "CB[I] overwriting previous command\n"); 12351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->cbbuf_cmnd_size = req->actual; 12361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(fsg->cbbuf_cmnd, req->buf, fsg->cbbuf_cmnd_size); 12371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wakeup_thread(fsg); 1239a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern spin_unlock(&fsg->lock); 12401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 12411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 12431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void received_cbi_adsc(struct fsg_dev *fsg, struct fsg_buffhd *bh) 12441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{} 12451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* CONFIG_USB_FILE_STORAGE_TEST */ 12461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int class_setup_req(struct fsg_dev *fsg, 12491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const struct usb_ctrlrequest *ctrl) 12501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 12511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_request *req = fsg->ep0req; 12521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int value = -EOPNOTSUPP; 12531bbc169621cbe502b9143a27eb12802a0f1d43a0David Brownell u16 w_index = le16_to_cpu(ctrl->wIndex); 125488e45dbbababd29cd6c80a3e0b60a828676b3ba9Luis Lloret u16 w_value = le16_to_cpu(ctrl->wValue); 12551bbc169621cbe502b9143a27eb12802a0f1d43a0David Brownell u16 w_length = le16_to_cpu(ctrl->wLength); 12561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!fsg->config) 12581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return value; 12591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Handle Bulk-only class-specific requests */ 12611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (transport_is_bbb()) { 12621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (ctrl->bRequest) { 12631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_BULK_RESET_REQUEST: 12651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctrl->bRequestType != (USB_DIR_OUT | 12661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_TYPE_CLASS | USB_RECIP_INTERFACE)) 12671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 126888e45dbbababd29cd6c80a3e0b60a828676b3ba9Luis Lloret if (w_index != 0 || w_value != 0) { 12691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = -EDOM; 12701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 12711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Raise an exception to stop the current operation 12741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and reinitialize our state. */ 12751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "bulk reset request\n"); 12761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds raise_exception(fsg, FSG_STATE_RESET); 12771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = DELAYED_STATUS; 12781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 12791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_BULK_GET_MAX_LUN_REQUEST: 12811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctrl->bRequestType != (USB_DIR_IN | 12821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_TYPE_CLASS | USB_RECIP_INTERFACE)) 12831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 128488e45dbbababd29cd6c80a3e0b60a828676b3ba9Luis Lloret if (w_index != 0 || w_value != 0) { 12851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = -EDOM; 12861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 12871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, "get max LUN\n"); 12891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *(u8 *) req->buf = fsg->nluns - 1; 129076f4af8efc72b6091d230cbe718cedca06d2d79eAlan Stern value = 1; 12911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 12921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 12941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Handle CBI class-specific requests */ 12961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 12971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (ctrl->bRequest) { 12981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 12991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_CBI_ADSC_REQUEST: 13001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctrl->bRequestType != (USB_DIR_OUT | 13011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_TYPE_CLASS | USB_RECIP_INTERFACE)) 13021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 130388e45dbbababd29cd6c80a3e0b60a828676b3ba9Luis Lloret if (w_index != 0 || w_value != 0) { 13041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = -EDOM; 13051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 13061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (w_length > MAX_COMMAND_SIZE) { 13081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = -EOVERFLOW; 13091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 13101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = w_length; 13121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->ep0req->context = received_cbi_adsc; 13131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 13141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (value == -EOPNOTSUPP) 13181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, 13191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "unknown class-specific control req " 13201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "%02x.%02x v%04x i%04x l%u\n", 13211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctrl->bRequestType, ctrl->bRequest, 13221bbc169621cbe502b9143a27eb12802a0f1d43a0David Brownell le16_to_cpu(ctrl->wValue), w_index, w_length); 13231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return value; 13241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 13251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 13281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Ep0 standard request handlers. These always run in_irq. */ 13301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int standard_setup_req(struct fsg_dev *fsg, 13321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const struct usb_ctrlrequest *ctrl) 13331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 13341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_request *req = fsg->ep0req; 13351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int value = -EOPNOTSUPP; 13361bbc169621cbe502b9143a27eb12802a0f1d43a0David Brownell u16 w_index = le16_to_cpu(ctrl->wIndex); 13371bbc169621cbe502b9143a27eb12802a0f1d43a0David Brownell u16 w_value = le16_to_cpu(ctrl->wValue); 13381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Usually this just stores reply data in the pre-allocated ep0 buffer, 13401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * but config change events will also reconfigure hardware. */ 13411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (ctrl->bRequest) { 13421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_REQ_GET_DESCRIPTOR: 13441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctrl->bRequestType != (USB_DIR_IN | USB_TYPE_STANDARD | 13451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_RECIP_DEVICE)) 13461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 13471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (w_value >> 8) { 13481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_DEVICE: 13501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, "get device descriptor\n"); 135176f4af8efc72b6091d230cbe718cedca06d2d79eAlan Stern value = sizeof device_desc; 13521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(req->buf, &device_desc, value); 13531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 13541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_DEVICE_QUALIFIER: 13551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, "get device qualifier\n"); 13562e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell if (!gadget_is_dualspeed(fsg->gadget)) 13571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 135876f4af8efc72b6091d230cbe718cedca06d2d79eAlan Stern value = sizeof dev_qualifier; 13591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(req->buf, &dev_qualifier, value); 13601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 13611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_OTHER_SPEED_CONFIG: 13631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, "get other-speed config descriptor\n"); 13642e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell if (!gadget_is_dualspeed(fsg->gadget)) 13651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 13661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto get_config; 13671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_CONFIG: 13681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, "get configuration descriptor\n"); 13692e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownellget_config: 13701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = populate_config_buf(fsg->gadget, 13711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds req->buf, 13721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds w_value >> 8, 13731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds w_value & 0xff); 13741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 13751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_DT_STRING: 13771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, "get string descriptor\n"); 13781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* wIndex == language code */ 13801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = usb_gadget_get_string(&stringtab, 13811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds w_value & 0xff, req->buf); 13821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 13831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 13841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 13851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* One config, two speeds */ 13871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_REQ_SET_CONFIGURATION: 13881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctrl->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD | 13891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_RECIP_DEVICE)) 13901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 13911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, "set configuration\n"); 13921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (w_value == CONFIG_VALUE || w_value == 0) { 13931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->new_config = w_value; 13941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Raise an exception to wipe out previous transaction 13961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * state (queued bufs, etc) and set the new config. */ 13971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds raise_exception(fsg, FSG_STATE_CONFIG_CHANGE); 13981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = DELAYED_STATUS; 13991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 14011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_REQ_GET_CONFIGURATION: 14021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctrl->bRequestType != (USB_DIR_IN | USB_TYPE_STANDARD | 14031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_RECIP_DEVICE)) 14041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 14051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, "get configuration\n"); 14061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *(u8 *) req->buf = fsg->config; 140776f4af8efc72b6091d230cbe718cedca06d2d79eAlan Stern value = 1; 14081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 14091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_REQ_SET_INTERFACE: 14111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctrl->bRequestType != (USB_DIR_OUT| USB_TYPE_STANDARD | 14121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_RECIP_INTERFACE)) 14131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 14141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->config && w_index == 0) { 14151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Raise an exception to wipe out previous transaction 14171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * state (queued bufs, etc) and install the new 14181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * interface altsetting. */ 14191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds raise_exception(fsg, FSG_STATE_INTERFACE_CHANGE); 14201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = DELAYED_STATUS; 14211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 14231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_REQ_GET_INTERFACE: 14241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ctrl->bRequestType != (USB_DIR_IN | USB_TYPE_STANDARD | 14251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_RECIP_INTERFACE)) 14261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 14271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!fsg->config) 14281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 14291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (w_index != 0) { 14301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds value = -EDOM; 14311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 14321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, "get interface\n"); 14341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *(u8 *) req->buf = 0; 143576f4af8efc72b6091d230cbe718cedca06d2d79eAlan Stern value = 1; 14361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 14371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 14391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, 14401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "unknown control req %02x.%02x v%04x i%04x l%u\n", 14411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ctrl->bRequestType, ctrl->bRequest, 14421bbc169621cbe502b9143a27eb12802a0f1d43a0David Brownell w_value, w_index, le16_to_cpu(ctrl->wLength)); 14431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return value; 14461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int fsg_setup(struct usb_gadget *gadget, 14501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const struct usb_ctrlrequest *ctrl) 14511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_dev *fsg = get_gadget_data(gadget); 14531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 14541bbc169621cbe502b9143a27eb12802a0f1d43a0David Brownell int w_length = le16_to_cpu(ctrl->wLength); 14551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ++fsg->ep0_req_tag; // Record arrival of a new request 14571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->ep0req->context = NULL; 14581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->ep0req->length = 0; 14591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dump_msg(fsg, "ep0-setup", (u8 *) ctrl, sizeof(*ctrl)); 14601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_CLASS) 14621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = class_setup_req(fsg, ctrl); 14631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 14641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = standard_setup_req(fsg, ctrl); 14651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Respond with data/status or defer until later? */ 14671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc >= 0 && rc != DELAYED_STATUS) { 146876f4af8efc72b6091d230cbe718cedca06d2d79eAlan Stern rc = min(rc, w_length); 14691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->ep0req->length = rc; 14701bbc169621cbe502b9143a27eb12802a0f1d43a0David Brownell fsg->ep0req->zero = rc < w_length; 14711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->ep0req_name = (ctrl->bRequestType & USB_DIR_IN ? 14721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "ep0-in" : "ep0-out"); 14731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = ep0_queue(fsg); 14741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 14751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Device either stalls (rc < 0) or reports success */ 14771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 14781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 14791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 14821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* All the following routines run in process context */ 14841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Use this for bulk or interrupt transfers, not ep0 */ 14871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void start_transfer(struct fsg_dev *fsg, struct usb_ep *ep, 1488a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern struct usb_request *req, int *pbusy, 1489a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern enum fsg_buffer_state *state) 14901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 14911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 14921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 14931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ep == fsg->bulk_in) 14941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dump_msg(fsg, "bulk-in", req->buf, req->length); 14951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (ep == fsg->intr_in) 14961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dump_msg(fsg, "intr-in", req->buf, req->length); 1497a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern 1498a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern spin_lock_irq(&fsg->lock); 14991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *pbusy = 1; 15001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *state = BUF_STATE_BUSY; 1501a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern spin_unlock_irq(&fsg->lock); 15021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = usb_ep_queue(ep, req, GFP_KERNEL); 15031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc != 0) { 15041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *pbusy = 0; 15051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *state = BUF_STATE_EMPTY; 15061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We can't do much more than wait for a reset */ 15081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Note: currently the net2280 driver fails zero-length 15101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * submissions if DMA is enabled. */ 15111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc != -ESHUTDOWN && !(rc == -EOPNOTSUPP && 15121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds req->length == 0)) 15131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds WARN(fsg, "error in submission: %s --> %d\n", 15141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep->name, rc); 15151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 15161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int sleep_thread(struct fsg_dev *fsg) 15201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1521a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern int rc = 0; 15221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Wait until a signal arrives or we are woken up */ 1524a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern for (;;) { 1525a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern try_to_freeze(); 1526a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern set_current_state(TASK_INTERRUPTIBLE); 1527a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern if (signal_pending(current)) { 1528a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern rc = -EINTR; 1529a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern break; 1530a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern } 1531a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern if (fsg->thread_wakeup_needed) 1532a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern break; 1533a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern schedule(); 1534a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern } 1535a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern __set_current_state(TASK_RUNNING); 15361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->thread_wakeup_needed = 0; 1537a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern return rc; 15381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 15391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 15421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_read(struct fsg_dev *fsg) 15441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 15451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = fsg->curlun; 15461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 lba; 15471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh; 15481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 15491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 amount_left; 15501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds loff_t file_offset, file_offset_tmp; 15511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int amount; 15521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int partial_page; 15531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ssize_t nread; 15541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Get the starting Logical Block Address and check that it's 15561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * not too big */ 15571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->cmnd[0] == SC_READ_6) 15581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds lba = (fsg->cmnd[1] << 16) | get_be16(&fsg->cmnd[2]); 15591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 15601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds lba = get_be32(&fsg->cmnd[2]); 15611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We allow DPO (Disable Page Out = don't save data in the 15631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * cache) and FUA (Force Unit Access = don't read from the 15641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * cache), but we don't implement them. */ 15651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((fsg->cmnd[1] & ~0x18) != 0) { 15661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_INVALID_FIELD_IN_CDB; 15671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 15681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 15691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 15701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (lba >= curlun->num_sectors) { 15711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; 15721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 15731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 15741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds file_offset = ((loff_t) lba) << 9; 15751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Carry out the file reads */ 15771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount_left = fsg->data_size_from_cmnd; 15781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely(amount_left == 0)) 15791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; // No default reply 15801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (;;) { 15821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Figure out how much we need to read: 15841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Try to read the remaining amount. 15851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * But don't read more than the buffer size. 15861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * And don't try to read past the end of the file. 15871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Finally, if we're not at a page boundary, don't read past 15881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the next page. 15891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If this means reading 0 then we were asked to read past 15901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the end of file. */ 15911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount = min((unsigned int) amount_left, mod_data.buflen); 15921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount = min((loff_t) amount, 15931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->file_length - file_offset); 15941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds partial_page = file_offset & (PAGE_CACHE_SIZE - 1); 15951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (partial_page > 0) 15961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount = min(amount, (unsigned int) PAGE_CACHE_SIZE - 15971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds partial_page); 15981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 15991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Wait for the next buffer to become available */ 16001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh = fsg->next_buffhd_to_fill; 16011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (bh->state != BUF_STATE_EMPTY) { 160279a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern rc = sleep_thread(fsg); 160379a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern if (rc) 16041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 16051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If we were asked to read past the end of file, 16081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * end with an empty buffer. */ 16091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (amount == 0) { 16101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = 16111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; 16121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data_info = file_offset >> 9; 16136174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern curlun->info_valid = 1; 16141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq->length = 0; 16151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->state = BUF_STATE_FULL; 16161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 16171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Perform the read */ 16201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds file_offset_tmp = file_offset; 16211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds nread = vfs_read(curlun->filp, 16221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (char __user *) bh->buf, 16231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount, &file_offset_tmp); 16241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VLDBG(curlun, "file read %u @ %llu -> %d\n", amount, 16251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long) file_offset, 16261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (int) nread); 16271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (signal_pending(current)) 16281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINTR; 16291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (nread < 0) { 16311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LDBG(curlun, "error in file read: %d\n", 16321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (int) nread); 16331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds nread = 0; 16341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (nread < amount) { 16351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LDBG(curlun, "partial file read: %d/%u\n", 16361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (int) nread, amount); 16371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds nread -= (nread & 511); // Round down to a block 16381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds file_offset += nread; 16401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount_left -= nread; 16411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->residue -= nread; 16421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq->length = nread; 16431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->state = BUF_STATE_FULL; 16441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If an error occurred, report it and its position */ 16461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (nread < amount) { 16471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_UNRECOVERED_READ_ERROR; 16481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data_info = file_offset >> 9; 16496174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern curlun->info_valid = 1; 16501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 16511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (amount_left == 0) 16541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; // No more left to read 16551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Send this buffer and go read some more */ 16571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq->zero = 0; 16581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds start_transfer(fsg, fsg->bulk_in, bh->inreq, 16591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &bh->inreq_busy, &bh->state); 16601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->next_buffhd_to_fill = bh->next; 16611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; // No default reply 16641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 16651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 16681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_write(struct fsg_dev *fsg) 16701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 16711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = fsg->curlun; 16721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 lba; 16731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh; 16741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int get_some_more; 16751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 amount_left_to_req, amount_left_to_write; 16761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds loff_t usb_offset, file_offset, file_offset_tmp; 16771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int amount; 16781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int partial_page; 16791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ssize_t nwritten; 16801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 16811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (curlun->ro) { 16831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_WRITE_PROTECTED; 16841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 16851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 16861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->filp->f_flags &= ~O_SYNC; // Default is not to wait 16871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Get the starting Logical Block Address and check that it's 16891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * not too big */ 16901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->cmnd[0] == SC_WRITE_6) 16911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds lba = (fsg->cmnd[1] << 16) | get_be16(&fsg->cmnd[2]); 16921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 16931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds lba = get_be32(&fsg->cmnd[2]); 16941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 16951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We allow DPO (Disable Page Out = don't save data in the 16961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * cache) and FUA (Force Unit Access = write directly to the 16971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * medium). We don't implement DPO; we implement FUA by 16981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * performing synchronous output. */ 16991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((fsg->cmnd[1] & ~0x18) != 0) { 17001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_INVALID_FIELD_IN_CDB; 17011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 17021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->cmnd[1] & 0x08) // FUA 17041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->filp->f_flags |= O_SYNC; 17051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (lba >= curlun->num_sectors) { 17071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; 17081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 17091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Carry out the file writes */ 17121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds get_some_more = 1; 17131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds file_offset = usb_offset = ((loff_t) lba) << 9; 17141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount_left_to_req = amount_left_to_write = fsg->data_size_from_cmnd; 17151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (amount_left_to_write > 0) { 17171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Queue a request for more data from the host */ 17191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh = fsg->next_buffhd_to_fill; 17201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bh->state == BUF_STATE_EMPTY && get_some_more) { 17211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Figure out how much we want to get: 17231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Try to get the remaining amount. 17241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * But don't get more than the buffer size. 17251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * And don't try to go past the end of the file. 17261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If we're not at a page boundary, 17271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * don't go past the next page. 17281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If this means getting 0, then we were asked 17291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * to write past the end of file. 17301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Finally, round down to a block boundary. */ 17311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount = min(amount_left_to_req, mod_data.buflen); 17321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount = min((loff_t) amount, curlun->file_length - 17331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_offset); 17341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds partial_page = usb_offset & (PAGE_CACHE_SIZE - 1); 17351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (partial_page > 0) 17361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount = min(amount, 17371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned int) PAGE_CACHE_SIZE - partial_page); 17381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (amount == 0) { 17401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds get_some_more = 0; 17411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = 17421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; 17431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data_info = usb_offset >> 9; 17446174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern curlun->info_valid = 1; 17451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 17461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount -= (amount & 511); 17481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (amount == 0) { 17491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Why were we were asked to transfer a 17511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * partial block? */ 17521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds get_some_more = 0; 17531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 17541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Get the next buffer */ 17571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_offset += amount; 17581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->usb_amount_left -= amount; 17591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount_left_to_req -= amount; 17601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (amount_left_to_req == 0) 17611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds get_some_more = 0; 17621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* amount is always divisible by 512, hence by 17641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the bulk-out maxpacket size */ 17651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->outreq->length = bh->bulk_out_intended_length = 17661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount; 176770ffe6e14d7c5db84b92841471ce6fd0200010cdAlan Stern bh->outreq->short_not_ok = 1; 17681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds start_transfer(fsg, fsg->bulk_out, bh->outreq, 17691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &bh->outreq_busy, &bh->state); 17701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->next_buffhd_to_fill = bh->next; 17711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 17721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Write the received data to the backing file */ 17751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh = fsg->next_buffhd_to_drain; 17761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bh->state == BUF_STATE_EMPTY && !get_some_more) 17771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; // We stopped early 17781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bh->state == BUF_STATE_FULL) { 1779a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern smp_rmb(); 17801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->next_buffhd_to_drain = bh->next; 17811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->state = BUF_STATE_EMPTY; 17821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Did something go wrong with the transfer? */ 17841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bh->outreq->status != 0) { 17851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_COMMUNICATION_FAILURE; 17861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data_info = file_offset >> 9; 17876174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern curlun->info_valid = 1; 17881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 17891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 17911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount = bh->outreq->actual; 17921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (curlun->file_length - file_offset < amount) { 17931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LERROR(curlun, 17941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "write %u @ %llu beyond end %llu\n", 17951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount, (unsigned long long) file_offset, 17961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long) curlun->file_length); 17971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount = curlun->file_length - file_offset; 17981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 17991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Perform the write */ 18011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds file_offset_tmp = file_offset; 18021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds nwritten = vfs_write(curlun->filp, 18031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (char __user *) bh->buf, 18041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount, &file_offset_tmp); 18051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VLDBG(curlun, "file write %u @ %llu -> %d\n", amount, 18061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long) file_offset, 18071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (int) nwritten); 18081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (signal_pending(current)) 18091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINTR; // Interrupted! 18101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (nwritten < 0) { 18121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LDBG(curlun, "error in file write: %d\n", 18131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (int) nwritten); 18141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds nwritten = 0; 18151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (nwritten < amount) { 18161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LDBG(curlun, "partial file write: %d/%u\n", 18171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (int) nwritten, amount); 18181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds nwritten -= (nwritten & 511); 18191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // Round down to a block 18201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 18211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds file_offset += nwritten; 18221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount_left_to_write -= nwritten; 18231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->residue -= nwritten; 18241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If an error occurred, report it and its position */ 18261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (nwritten < amount) { 18271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_WRITE_ERROR; 18281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data_info = file_offset >> 9; 18296174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern curlun->info_valid = 1; 18301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 18311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 18321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Did the host decide to stop early? */ 18341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bh->outreq->actual != bh->outreq->length) { 18351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->short_packet_received = 1; 18361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 18371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 18381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 18391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 18401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Wait for something to happen */ 184279a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern rc = sleep_thread(fsg); 184379a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern if (rc) 18441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 18451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 18461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; // No default reply 18481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 18521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Sync the file data, don't bother with the metadata. 18541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This code was copied from fs/buffer.c:sys_fdatasync(). */ 18551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int fsync_sub(struct lun *curlun) 18561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct file *filp = curlun->filp; 18581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct inode *inode; 18591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc, err; 18601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (curlun->ro || !filp) 18621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 18631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!filp->f_op->fsync) 18641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 18651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 186633cb89940082c54f348062db2f8bab6cf8fed816Josef Sipek inode = filp->f_path.dentry->d_inode; 18671b1dcc1b57a49136f118a0f16367256ff9994a69Jes Sorensen mutex_lock(&inode->i_mutex); 18681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = filemap_fdatawrite(inode->i_mapping); 186933cb89940082c54f348062db2f8bab6cf8fed816Josef Sipek err = filp->f_op->fsync(filp, filp->f_path.dentry, 1); 18701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!rc) 18711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = err; 18721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds err = filemap_fdatawait(inode->i_mapping); 18731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!rc) 18741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = err; 18751b1dcc1b57a49136f118a0f16367256ff9994a69Jes Sorensen mutex_unlock(&inode->i_mutex); 18761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VLDBG(curlun, "fdatasync -> %d\n", rc); 18771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 18781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void fsync_all(struct fsg_dev *fsg) 18811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 18831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < fsg->nluns; ++i) 18851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsync_sub(&fsg->luns[i]); 18861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 18871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_synchronize_cache(struct fsg_dev *fsg) 18891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 18901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = fsg->curlun; 18911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 18921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We ignore the requested LBA and write out all file's 18941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * dirty data buffers. */ 18951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = fsync_sub(curlun); 18961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc) 18971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_WRITE_ERROR; 18981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 18991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 19001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 19031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void invalidate_sub(struct lun *curlun) 19051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 19061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct file *filp = curlun->filp; 190733cb89940082c54f348062db2f8bab6cf8fed816Josef Sipek struct inode *inode = filp->f_path.dentry->d_inode; 19081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long rc; 19091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1910fc0ecff698165ae8e178efa086e0dd1f385206b1Andrew Morton rc = invalidate_mapping_pages(inode->i_mapping, 0, -1); 19111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VLDBG(curlun, "invalidate_inode_pages -> %ld\n", rc); 19121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 19131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_verify(struct fsg_dev *fsg) 19151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 19161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = fsg->curlun; 19171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 lba; 19181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 verification_length; 19191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh = fsg->next_buffhd_to_fill; 19201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds loff_t file_offset, file_offset_tmp; 19211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 amount_left; 19221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int amount; 19231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ssize_t nread; 19241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Get the starting Logical Block Address and check that it's 19261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * not too big */ 19271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds lba = get_be32(&fsg->cmnd[2]); 19281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (lba >= curlun->num_sectors) { 19291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; 19301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 19311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 19321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We allow DPO (Disable Page Out = don't save data in the 19341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * cache) but we don't implement it. */ 19351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((fsg->cmnd[1] & ~0x10) != 0) { 19361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_INVALID_FIELD_IN_CDB; 19371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 19381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 19391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds verification_length = get_be16(&fsg->cmnd[7]); 19411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (unlikely(verification_length == 0)) 19421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EIO; // No default reply 19431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Prepare to carry out the file verify */ 19451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount_left = verification_length << 9; 19461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds file_offset = ((loff_t) lba) << 9; 19471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Write out all the dirty buffers before invalidating them */ 19491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsync_sub(curlun); 19501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (signal_pending(current)) 19511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINTR; 19521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds invalidate_sub(curlun); 19541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (signal_pending(current)) 19551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINTR; 19561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Just try to read the requested blocks */ 19581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (amount_left > 0) { 19591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Figure out how much we need to read: 19611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Try to read the remaining amount, but not more than 19621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the buffer size. 19631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * And don't try to read past the end of the file. 19641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If this means reading 0 then we were asked to read 19651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * past the end of file. */ 19661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount = min((unsigned int) amount_left, mod_data.buflen); 19671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount = min((loff_t) amount, 19681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->file_length - file_offset); 19691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (amount == 0) { 19701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = 19711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE; 19721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data_info = file_offset >> 9; 19736174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern curlun->info_valid = 1; 19741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 19751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 19761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Perform the read */ 19781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds file_offset_tmp = file_offset; 19791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds nread = vfs_read(curlun->filp, 19801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (char __user *) bh->buf, 19811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount, &file_offset_tmp); 19821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VLDBG(curlun, "file read %u @ %llu -> %d\n", amount, 19831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (unsigned long long) file_offset, 19841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (int) nread); 19851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (signal_pending(current)) 19861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINTR; 19871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 19881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (nread < 0) { 19891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LDBG(curlun, "error in file verify: %d\n", 19901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (int) nread); 19911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds nread = 0; 19921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (nread < amount) { 19931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LDBG(curlun, "partial file verify: %d/%u\n", 19941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (int) nread, amount); 19951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds nread -= (nread & 511); // Round down to a sector 19961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 19971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (nread == 0) { 19981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_UNRECOVERED_READ_ERROR; 19991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data_info = file_offset >> 9; 20006174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern curlun->info_valid = 1; 20011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 20021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 20031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds file_offset += nread; 20041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount_left -= nread; 20051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 20061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 20071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 20081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 20111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_inquiry(struct fsg_dev *fsg, struct fsg_buffhd *bh) 20131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 20141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *buf = (u8 *) bh->buf; 20151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds static char vendor_id[] = "Linux "; 20171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds static char product_id[] = "File-Stor Gadget"; 20181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!fsg->curlun) { // Unsupported LUNs are okay 20201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->bad_lun_okay = 1; 20211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(buf, 0, 36); 20221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[0] = 0x7f; // Unsupported, no device-type 20231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 36; 20241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 20251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(buf, 0, 8); // Non-removable, direct-access device 20271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mod_data.removable) 20281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[1] = 0x80; 20291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[2] = 2; // ANSI SCSI level 2 20301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[3] = 2; // SCSI-2 INQUIRY data format 20311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[4] = 31; // Additional length 20321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // No special options 20331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sprintf(buf + 8, "%-8s%-16s%04x", vendor_id, product_id, 20341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.release); 20351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 36; 20361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 20371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_request_sense(struct fsg_dev *fsg, struct fsg_buffhd *bh) 20401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 20411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = fsg->curlun; 20421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *buf = (u8 *) bh->buf; 20431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 sd, sdinfo; 20446174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern int valid; 20451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 20471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * From the SCSI-2 spec., section 7.9 (Unit attention condition): 20481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 20491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If a REQUEST SENSE command is received from an initiator 20501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * with a pending unit attention condition (before the target 20511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * generates the contingent allegiance condition), then the 20521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * target shall either: 20531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * a) report any pending sense data and preserve the unit 20541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * attention condition on the logical unit, or, 20551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * b) report the unit attention condition, may discard any 20561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * pending sense data, and clear the unit attention 20571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * condition on the logical unit for that initiator. 20581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 20591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * FSG normally uses option a); enable this code to use option b). 20601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 20611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#if 0 20621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (curlun && curlun->unit_attention_data != SS_NO_SENSE) { 20631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = curlun->unit_attention_data; 20641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->unit_attention_data = SS_NO_SENSE; 20651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 20661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 20671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!curlun) { // Unsupported LUNs are okay 20691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->bad_lun_okay = 1; 20701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sd = SS_LOGICAL_UNIT_NOT_SUPPORTED; 20711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sdinfo = 0; 20726174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern valid = 0; 20731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 20741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sd = curlun->sense_data; 20751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sdinfo = curlun->sense_data_info; 20766174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern valid = curlun->info_valid << 7; 20771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_NO_SENSE; 20781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data_info = 0; 20796174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern curlun->info_valid = 0; 20801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 20811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(buf, 0, 18); 20836174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern buf[0] = valid | 0x70; // Valid, current error 20841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[2] = SK(sd); 20851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds put_be32(&buf[3], sdinfo); // Sense information 20861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[7] = 18 - 8; // Additional sense length 20871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[12] = ASC(sd); 20881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[13] = ASCQ(sd); 20891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 18; 20901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 20911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 20931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_read_capacity(struct fsg_dev *fsg, struct fsg_buffhd *bh) 20941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 20951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = fsg->curlun; 20961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 lba = get_be32(&fsg->cmnd[2]); 20971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int pmi = fsg->cmnd[8]; 20981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *buf = (u8 *) bh->buf; 20991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Check the PMI and LBA fields */ 21011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (pmi > 1 || (pmi == 0 && lba != 0)) { 21021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_INVALID_FIELD_IN_CDB; 21031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 21041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds put_be32(&buf[0], curlun->num_sectors - 1); // Max logical block 21071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds put_be32(&buf[4], 512); // Block length 21081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 8; 21091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 21101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_mode_sense(struct fsg_dev *fsg, struct fsg_buffhd *bh) 21131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 21141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = fsg->curlun; 21151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int mscmnd = fsg->cmnd[0]; 21161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *buf = (u8 *) bh->buf; 21171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *buf0 = buf; 21181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int pc, page_code; 21191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int changeable_values, all_pages; 21201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int valid_page = 0; 21211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int len, limit; 21221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((fsg->cmnd[1] & ~0x08) != 0) { // Mask away DBD 21241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_INVALID_FIELD_IN_CDB; 21251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 21261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pc = fsg->cmnd[2] >> 6; 21281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds page_code = fsg->cmnd[2] & 0x3f; 21291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (pc == 3) { 21301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_SAVING_PARAMETERS_NOT_SUPPORTED; 21311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 21321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds changeable_values = (pc == 1); 21341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds all_pages = (page_code == 0x3f); 21351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Write the mode parameter header. Fixed values are: default 21371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * medium type, no cache control (DPOFUA), and no block descriptors. 21381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The only variable value is the WriteProtect bit. We will fill in 21391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the mode data length later. */ 21401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(buf, 0, 8); 21411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mscmnd == SC_MODE_SENSE_6) { 21421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[2] = (curlun->ro ? 0x80 : 0x00); // WP, DPOFUA 21431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf += 4; 21441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds limit = 255; 21451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { // SC_MODE_SENSE_10 21461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[3] = (curlun->ro ? 0x80 : 0x00); // WP, DPOFUA 21471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf += 8; 21481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds limit = 65535; // Should really be mod_data.buflen 21491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* No block descriptors */ 21521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The mode pages, in numerical order. The only page we support 21541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * is the Caching page. */ 21551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (page_code == 0x08 || all_pages) { 21561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds valid_page = 1; 21571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[0] = 0x08; // Page code 21581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[1] = 10; // Page length 21591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(buf+2, 0, 10); // None of the fields are changeable 21601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!changeable_values) { 21621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[2] = 0x04; // Write cache enable, 21631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // Read cache not disabled 21641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // No cache retention priorities 21651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds put_be16(&buf[4], 0xffff); // Don't disable prefetch 21661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // Minimum prefetch = 0 21671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds put_be16(&buf[8], 0xffff); // Maximum prefetch 21681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds put_be16(&buf[10], 0xffff); // Maximum prefetch ceiling 21691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf += 12; 21711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Check that a valid page was requested and the mode data length 21741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * isn't too long. */ 21751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds len = buf - buf0; 21761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!valid_page || len > limit) { 21771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_INVALID_FIELD_IN_CDB; 21781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 21791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Store the mode data length */ 21821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mscmnd == SC_MODE_SENSE_6) 21831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf0[0] = len - 1; 21841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 21851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds put_be16(buf0, len - 2); 21861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return len; 21871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 21881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_start_stop(struct fsg_dev *fsg) 21911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 21921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = fsg->curlun; 21931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int loej, start; 21941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 21951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!mod_data.removable) { 21961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_INVALID_COMMAND; 21971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 21981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 21991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // int immed = fsg->cmnd[1] & 0x01; 22011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds loej = fsg->cmnd[4] & 0x02; 22021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds start = fsg->cmnd[4] & 0x01; 22031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_FILE_STORAGE_TEST 22051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((fsg->cmnd[1] & ~0x01) != 0 || // Mask away Immed 22061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (fsg->cmnd[4] & ~0x03) != 0) { // Mask LoEj, Start 22071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_INVALID_FIELD_IN_CDB; 22081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 22091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 22101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!start) { 22121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Are we allowed to unload the media? */ 22141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (curlun->prevent_medium_removal) { 22151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LDBG(curlun, "unload attempt prevented\n"); 22161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_MEDIUM_REMOVAL_PREVENTED; 22171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 22181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 22191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (loej) { // Simulate an unload/eject 22201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up_read(&fsg->filesem); 22211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds down_write(&fsg->filesem); 22221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds close_backing_file(curlun); 22231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up_write(&fsg->filesem); 22241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds down_read(&fsg->filesem); 22251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 22261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 22271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Our emulation doesn't support mounting; the medium is 22291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * available for use as soon as it is loaded. */ 22301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!backing_file_is_open(curlun)) { 22311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_MEDIUM_NOT_PRESENT; 22321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 22331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 22341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 22351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 22361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 22371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 22381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_prevent_allow(struct fsg_dev *fsg) 22411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 22421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = fsg->curlun; 22431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int prevent; 22441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!mod_data.removable) { 22461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_INVALID_COMMAND; 22471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 22481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 22491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prevent = fsg->cmnd[4] & 0x01; 22511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((fsg->cmnd[4] & ~0x01) != 0) { // Mask away Prevent 22521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_INVALID_FIELD_IN_CDB; 22531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 22541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 22551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (curlun->prevent_medium_removal && !prevent) 22571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsync_sub(curlun); 22581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->prevent_medium_removal = prevent; 22591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 22601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 22611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_read_format_capacities(struct fsg_dev *fsg, 22641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh) 22651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 22661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = fsg->curlun; 22671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 *buf = (u8 *) bh->buf; 22681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[0] = buf[1] = buf[2] = 0; 22701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[3] = 8; // Only the Current/Maximum Capacity Descriptor 22711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf += 4; 22721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds put_be32(&buf[0], curlun->num_sectors); // Number of blocks 22741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds put_be32(&buf[4], 512); // Block length 22751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[4] = 0x02; // Current capacity 22761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 12; 22771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 22781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_mode_select(struct fsg_dev *fsg, struct fsg_buffhd *bh) 22811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 22821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = fsg->curlun; 22831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We don't support MODE SELECT */ 22851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_INVALID_COMMAND; 22861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 22871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 22881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 22911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int halt_bulk_in_endpoint(struct fsg_dev *fsg) 22931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 22941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 22951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 22961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = fsg_set_halt(fsg, fsg->bulk_in); 22971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc == -EAGAIN) 22981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, "delayed bulk-in endpoint halt\n"); 22991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (rc != 0) { 23001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc != -EAGAIN) { 23011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds WARN(fsg, "usb_ep_set_halt -> %d\n", rc); 23021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = 0; 23031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 23041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 23051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Wait for a short time and then try again */ 23071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (msleep_interruptible(100) != 0) 23081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINTR; 23091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = usb_ep_set_halt(fsg->bulk_in); 23101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 23111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 23121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 23131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int pad_with_zeros(struct fsg_dev *fsg) 23151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 23161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh = fsg->next_buffhd_to_fill; 23171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 nkeep = bh->inreq->length; 23181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 nsend; 23191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 23201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->state = BUF_STATE_EMPTY; // For the first iteration 23221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->usb_amount_left = nkeep + fsg->residue; 23231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (fsg->usb_amount_left > 0) { 23241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Wait for the next buffer to be free */ 23261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (bh->state != BUF_STATE_EMPTY) { 232779a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern rc = sleep_thread(fsg); 232879a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern if (rc) 23291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 23301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 23311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds nsend = min(fsg->usb_amount_left, (u32) mod_data.buflen); 23331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memset(bh->buf + nkeep, 0, nsend - nkeep); 23341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq->length = nsend; 23351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq->zero = 0; 23361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds start_transfer(fsg, fsg->bulk_in, bh->inreq, 23371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &bh->inreq_busy, &bh->state); 23381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh = fsg->next_buffhd_to_fill = bh->next; 23391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->usb_amount_left -= nsend; 23401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds nkeep = 0; 23411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 23421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 23431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 23441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int throw_away_data(struct fsg_dev *fsg) 23461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 23471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh; 23481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 amount; 23491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 23501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while ((bh = fsg->next_buffhd_to_drain)->state != BUF_STATE_EMPTY || 23521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->usb_amount_left > 0) { 23531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Throw away the data in a filled buffer */ 23551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bh->state == BUF_STATE_FULL) { 2356a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern smp_rmb(); 23571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->state = BUF_STATE_EMPTY; 23581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->next_buffhd_to_drain = bh->next; 23591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* A short packet or an error ends everything */ 23611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bh->outreq->actual != bh->outreq->length || 23621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->outreq->status != 0) { 23631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds raise_exception(fsg, FSG_STATE_ABORT_BULK_OUT); 23641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINTR; 23651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 23661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 23671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 23681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Try to submit another request if we need one */ 23701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh = fsg->next_buffhd_to_fill; 23711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bh->state == BUF_STATE_EMPTY && fsg->usb_amount_left > 0) { 23721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount = min(fsg->usb_amount_left, 23731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (u32) mod_data.buflen); 23741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* amount is always divisible by 512, hence by 23761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the bulk-out maxpacket size */ 23771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->outreq->length = bh->bulk_out_intended_length = 23781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds amount; 237970ffe6e14d7c5db84b92841471ce6fd0200010cdAlan Stern bh->outreq->short_not_ok = 1; 23801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds start_transfer(fsg, fsg->bulk_out, bh->outreq, 23811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &bh->outreq_busy, &bh->state); 23821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->next_buffhd_to_fill = bh->next; 23831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->usb_amount_left -= amount; 23841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 23851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 23861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Otherwise wait for something to happen */ 238879a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern rc = sleep_thread(fsg); 238979a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern if (rc) 23901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 23911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 23921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 23931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 23941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 23961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int finish_reply(struct fsg_dev *fsg) 23971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 23981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh = fsg->next_buffhd_to_fill; 23991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc = 0; 24001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (fsg->data_dir) { 24021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DATA_DIR_NONE: 24031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; // Nothing to send 24041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If we don't know whether the host wants to read or write, 24061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * this must be CB or CBI with an unknown command. We mustn't 24071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * try to send or receive any data. So stall both bulk pipes 24081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * if we can and wait for a reset. */ 24091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DATA_DIR_UNKNOWN: 24101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mod_data.can_stall) { 24111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg_set_halt(fsg, fsg->bulk_out); 24121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = halt_bulk_in_endpoint(fsg); 24131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 24141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 24151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* All but the last buffer of data must have already been sent */ 24171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DATA_DIR_TO_HOST: 24181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->data_size == 0) 24191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ; // Nothing to send 24201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If there's no residue, simply send the last buffer */ 24221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (fsg->residue == 0) { 24231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq->zero = 0; 24241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds start_transfer(fsg, fsg->bulk_in, bh->inreq, 24251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &bh->inreq_busy, &bh->state); 24261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->next_buffhd_to_fill = bh->next; 24271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 24281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* There is a residue. For CB and CBI, simply mark the end 24301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * of the data with a short packet. However, if we are 24311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * allowed to stall, there was no data at all (residue == 24321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * data_size), and the command failed (invalid LUN or 24331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * sense data is set), then halt the bulk-in endpoint 24341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * instead. */ 24351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (!transport_is_bbb()) { 24361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mod_data.can_stall && 24371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->residue == fsg->data_size && 24381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (!fsg->curlun || fsg->curlun->sense_data != SS_NO_SENSE)) { 24391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->state = BUF_STATE_EMPTY; 24401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = halt_bulk_in_endpoint(fsg); 24411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 24421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq->zero = 1; 24431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds start_transfer(fsg, fsg->bulk_in, bh->inreq, 24441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &bh->inreq_busy, &bh->state); 24451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->next_buffhd_to_fill = bh->next; 24461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 24471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 24481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* For Bulk-only, if we're allowed to stall then send the 24501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * short packet and halt the bulk-in endpoint. If we can't 24511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * stall, pad out the remaining data with 0's. */ 24521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 24531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mod_data.can_stall) { 24541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq->zero = 1; 24551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds start_transfer(fsg, fsg->bulk_in, bh->inreq, 24561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &bh->inreq_busy, &bh->state); 24571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->next_buffhd_to_fill = bh->next; 24581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = halt_bulk_in_endpoint(fsg); 24591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 24601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = pad_with_zeros(fsg); 24611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 24621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 24631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We have processed all we want from the data the host has sent. 24651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * There may still be outstanding bulk-out requests. */ 24661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case DATA_DIR_FROM_HOST: 24671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->residue == 0) 24681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ; // Nothing to receive 24691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Did the host stop sending unexpectedly early? */ 24711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (fsg->short_packet_received) { 24721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds raise_exception(fsg, FSG_STATE_ABORT_BULK_OUT); 24731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = -EINTR; 24741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 24751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We haven't processed all the incoming data. Even though 24771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * we may be allowed to stall, doing so would cause a race. 24781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The controller may already have ACK'ed all the remaining 24791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * bulk-out packets, in which case the host wouldn't see a 24801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * STALL. Not realizing the endpoint was halted, it wouldn't 24811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * clear the halt -- leading to problems later on. */ 24821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#if 0 24831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (mod_data.can_stall) { 24841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg_set_halt(fsg, fsg->bulk_out); 24851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds raise_exception(fsg, FSG_STATE_ABORT_BULK_OUT); 24861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = -EINTR; 24871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 24881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 24891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We can't stall. Read in the excess data and throw it 24911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * all away. */ 24921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 24931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = throw_away_data(fsg); 24941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 24951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 24961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 24971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 24981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 24991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int send_status(struct fsg_dev *fsg) 25011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 25021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = fsg->curlun; 25031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh; 25041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 25051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 status = USB_STATUS_PASS; 25061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 sd, sdinfo = 0; 25071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Wait for the next buffer to become available */ 25091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh = fsg->next_buffhd_to_fill; 25101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (bh->state != BUF_STATE_EMPTY) { 251179a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern rc = sleep_thread(fsg); 251279a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern if (rc) 25131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 25141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 25151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (curlun) { 25171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sd = curlun->sense_data; 25181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sdinfo = curlun->sense_data_info; 25191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (fsg->bad_lun_okay) 25201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sd = SS_NO_SENSE; 25211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 25221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sd = SS_LOGICAL_UNIT_NOT_SUPPORTED; 25231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->phase_error) { 25251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "sending phase-error status\n"); 25261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = USB_STATUS_PHASE_ERROR; 25271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sd = SS_INVALID_COMMAND; 25281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (sd != SS_NO_SENSE) { 25291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "sending command-failure status\n"); 25301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds status = USB_STATUS_FAIL; 25311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, " sense data: SK x%02x, ASC x%02x, ASCQ x%02x;" 25321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds " info x%x\n", 25331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SK(sd), ASC(sd), ASCQ(sd), sdinfo); 25341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 25351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (transport_is_bbb()) { 25377ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct bulk_cs_wrap *csw = bh->buf; 25381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Store and send the Bulk-only CSW */ 25401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds csw->Signature = __constant_cpu_to_le32(USB_BULK_CS_SIG); 25411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds csw->Tag = fsg->tag; 25421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds csw->Residue = cpu_to_le32(fsg->residue); 25431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds csw->Status = status; 25441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq->length = USB_BULK_CS_WRAP_LEN; 25461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq->zero = 0; 25471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds start_transfer(fsg, fsg->bulk_in, bh->inreq, 25481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &bh->inreq_busy, &bh->state); 25491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (mod_data.transport_type == USB_PR_CB) { 25511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Control-Bulk transport has no status phase! */ 25531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 25541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { // USB_PR_CBI 25567ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct interrupt_data *buf = bh->buf; 25571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Store and send the Interrupt data. UFI sends the ASC 25591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and ASCQ bytes. Everything else sends a Type (which 25601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * is always 0) and the status Value. */ 25611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mod_data.protocol_type == USB_SC_UFI) { 25621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->bType = ASC(sd); 25631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->bValue = ASCQ(sd); 25641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 25651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->bType = 0; 25661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf->bValue = status; 25671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 25681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->intreq->length = CBI_INTERRUPT_DATA_LEN; 25691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->intr_buffhd = bh; // Point to the right buffhd 25711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->intreq->buf = bh->inreq->buf; 25721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->intreq->context = bh; 25731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds start_transfer(fsg, fsg->intr_in, fsg->intreq, 25741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &fsg->intreq_busy, &bh->state); 25751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 25761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->next_buffhd_to_fill = bh->next; 25781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 25791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 25801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 25831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Check whether the command is properly formed and whether its data size 25851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and direction agree with the values we already have. */ 25861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int check_command(struct fsg_dev *fsg, int cmnd_size, 25871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds enum data_direction data_dir, unsigned int mask, 25881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int needs_medium, const char *name) 25891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 25901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 25911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int lun = fsg->cmnd[1] >> 5; 25921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds static const char dirletter[4] = {'u', 'o', 'i', 'n'}; 25931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char hdlen[20]; 25941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun; 25951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 25961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Adjust the expected cmnd_size for protocol encapsulation padding. 25971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Transparent SCSI doesn't pad. */ 25981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (protocol_is_scsi()) 25991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ; 26001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* There's some disagreement as to whether RBC pads commands or not. 26021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * We'll play it safe and accept either form. */ 26031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (mod_data.protocol_type == USB_SC_RBC) { 26041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->cmnd_size == 12) 26051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmnd_size = 12; 26061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* All the other protocols pad to 12 bytes */ 26081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 26091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmnd_size = 12; 26101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hdlen[0] = 0; 26121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->data_dir != DATA_DIR_UNKNOWN) 26131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sprintf(hdlen, ", H%c=%u", dirletter[(int) fsg->data_dir], 26141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size); 26151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds VDBG(fsg, "SCSI command: %s; Dc=%d, D%c=%u; Hc=%d%s\n", 26161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds name, cmnd_size, dirletter[(int) data_dir], 26171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd, fsg->cmnd_size, hdlen); 26181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We can't reply at all until we know the correct data direction 26201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * and size. */ 26211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->data_size_from_cmnd == 0) 26221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds data_dir = DATA_DIR_NONE; 26231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->data_dir == DATA_DIR_UNKNOWN) { // CB or CBI 26241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_dir = data_dir; 26251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size = fsg->data_size_from_cmnd; 26261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { // Bulk-only 26281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->data_size < fsg->data_size_from_cmnd) { 26291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Host data size < Device data size is a phase error. 26311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Carry out the command, but only transfer as much 26321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * as we are allowed. */ 26331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = fsg->data_size; 26341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->phase_error = 1; 26351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 26361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 26371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->residue = fsg->usb_amount_left = fsg->data_size; 26381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Conflicting data directions is a phase error */ 26401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->data_dir != data_dir && fsg->data_size_from_cmnd > 0) { 26411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->phase_error = 1; 26421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 26431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 26441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Verify the length of the command itself */ 26461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cmnd_size != fsg->cmnd_size) { 26471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Special case workaround: MS-Windows issues REQUEST SENSE 26491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * with cbw->Length == 12 (it should be 6). */ 26501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->cmnd[0] == SC_REQUEST_SENSE && fsg->cmnd_size == 12) 26511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cmnd_size = fsg->cmnd_size; 26521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 26531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->phase_error = 1; 26541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 26551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 26561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 26571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2658d794ac7ae3613c2abfb678617ac7d74c8ff0099cAlan Stern /* Check that the LUN values are consistent */ 26591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (transport_is_bbb()) { 26601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->lun != lun) 26611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "using LUN %d from CBW, " 26621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "not LUN %d from CDB\n", 26631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->lun, lun); 26641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else 26651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->lun = lun; // Use LUN from the command 26661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Check the LUN */ 26681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->lun >= 0 && fsg->lun < fsg->nluns) { 26691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->curlun = curlun = &fsg->luns[fsg->lun]; 26701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->cmnd[0] != SC_REQUEST_SENSE) { 26711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_NO_SENSE; 26721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data_info = 0; 26736174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern curlun->info_valid = 0; 26741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 26751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 26761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->curlun = curlun = NULL; 26771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->bad_lun_okay = 0; 26781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* INQUIRY and REQUEST SENSE commands are explicitly allowed 26801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * to use unsupported LUNs; all others may not. */ 26811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->cmnd[0] != SC_INQUIRY && 26821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->cmnd[0] != SC_REQUEST_SENSE) { 26831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "unsupported LUN %d\n", fsg->lun); 26841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 26851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 26861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 26871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If a unit attention condition exists, only INQUIRY and 26891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * REQUEST SENSE commands are allowed; anything else must fail. */ 26901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (curlun && curlun->unit_attention_data != SS_NO_SENSE && 26911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->cmnd[0] != SC_INQUIRY && 26921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->cmnd[0] != SC_REQUEST_SENSE) { 26931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = curlun->unit_attention_data; 26941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->unit_attention_data = SS_NO_SENSE; 26951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 26961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 26971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 26981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Check that only command bytes listed in the mask are non-zero */ 26991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->cmnd[1] &= 0x1f; // Mask away the LUN 27001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 1; i < cmnd_size; ++i) { 27011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->cmnd[i] && !(mask & (1 << i))) { 27021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (curlun) 27031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_INVALID_FIELD_IN_CDB; 27041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 27051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 27061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 27071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If the medium isn't mounted and the command needs to access 27091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it, return an error. */ 27101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (curlun && !backing_file_is_open(curlun) && needs_medium) { 27111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = SS_MEDIUM_NOT_PRESENT; 27121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 27131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 27141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 27161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 27171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_scsi_command(struct fsg_dev *fsg) 27201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 27211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh; 27221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 27231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int reply = -EINVAL; 27241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 27251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds static char unknown[16]; 27261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dump_cdb(fsg); 27281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Wait for the next buffer to become available for data or status */ 27301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh = fsg->next_buffhd_to_drain = fsg->next_buffhd_to_fill; 27311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (bh->state != BUF_STATE_EMPTY) { 273279a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern rc = sleep_thread(fsg); 273379a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern if (rc) 27341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 273579a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern } 27361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->phase_error = 0; 27371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->short_packet_received = 0; 27381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds down_read(&fsg->filesem); // We're using the backing file 27401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (fsg->cmnd[0]) { 27411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_INQUIRY: 27431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = fsg->cmnd[4]; 27441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 6, DATA_DIR_TO_HOST, 27451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (1<<4), 0, 27461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "INQUIRY")) == 0) 27471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_inquiry(fsg, bh); 27481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 27491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_MODE_SELECT_6: 27511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = fsg->cmnd[4]; 27521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 6, DATA_DIR_FROM_HOST, 27531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (1<<1) | (1<<4), 0, 27541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "MODE SELECT(6)")) == 0) 27551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_mode_select(fsg, bh); 27561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 27571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_MODE_SELECT_10: 27591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]); 27601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 10, DATA_DIR_FROM_HOST, 27611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (1<<1) | (3<<7), 0, 27621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "MODE SELECT(10)")) == 0) 27631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_mode_select(fsg, bh); 27641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 27651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_MODE_SENSE_6: 27671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = fsg->cmnd[4]; 27681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 6, DATA_DIR_TO_HOST, 27691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (1<<1) | (1<<2) | (1<<4), 0, 27701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "MODE SENSE(6)")) == 0) 27711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_mode_sense(fsg, bh); 27721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 27731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_MODE_SENSE_10: 27751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]); 27761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST, 27771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (1<<1) | (1<<2) | (3<<7), 0, 27781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "MODE SENSE(10)")) == 0) 27791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_mode_sense(fsg, bh); 27801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 27811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_PREVENT_ALLOW_MEDIUM_REMOVAL: 27831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = 0; 27841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 6, DATA_DIR_NONE, 27851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (1<<4), 0, 27861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "PREVENT-ALLOW MEDIUM REMOVAL")) == 0) 27871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_prevent_allow(fsg); 27881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 27891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_READ_6: 27911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i = fsg->cmnd[4]; 27921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = (i == 0 ? 256 : i) << 9; 27931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 6, DATA_DIR_TO_HOST, 27941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (7<<1) | (1<<4), 1, 27951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "READ(6)")) == 0) 27961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_read(fsg); 27971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 27981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_READ_10: 28001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]) << 9; 28011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST, 28021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (1<<1) | (0xf<<2) | (3<<7), 1, 28031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "READ(10)")) == 0) 28041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_read(fsg); 28051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 28061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_READ_12: 28081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = get_be32(&fsg->cmnd[6]) << 9; 28091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 12, DATA_DIR_TO_HOST, 28101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (1<<1) | (0xf<<2) | (0xf<<6), 1, 28111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "READ(12)")) == 0) 28121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_read(fsg); 28131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 28141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_READ_CAPACITY: 28161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = 8; 28171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST, 28181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (0xf<<2) | (1<<8), 1, 28191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "READ CAPACITY")) == 0) 28201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_read_capacity(fsg, bh); 28211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 28221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_READ_FORMAT_CAPACITIES: 28241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]); 28251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST, 28261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (3<<7), 1, 28271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "READ FORMAT CAPACITIES")) == 0) 28281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_read_format_capacities(fsg, bh); 28291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 28301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_REQUEST_SENSE: 28321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = fsg->cmnd[4]; 28331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 6, DATA_DIR_TO_HOST, 28341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (1<<4), 0, 28351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "REQUEST SENSE")) == 0) 28361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_request_sense(fsg, bh); 28371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 28381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_START_STOP_UNIT: 28401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = 0; 28411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 6, DATA_DIR_NONE, 28421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (1<<1) | (1<<4), 0, 28431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "START-STOP UNIT")) == 0) 28441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_start_stop(fsg); 28451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 28461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_SYNCHRONIZE_CACHE: 28481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = 0; 28491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 10, DATA_DIR_NONE, 28501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (0xf<<2) | (3<<7), 1, 28511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "SYNCHRONIZE CACHE")) == 0) 28521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_synchronize_cache(fsg); 28531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 28541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_TEST_UNIT_READY: 28561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = 0; 28571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = check_command(fsg, 6, DATA_DIR_NONE, 28581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 0, 1, 28591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "TEST UNIT READY"); 28601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 28611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Although optional, this command is used by MS-Windows. We 28631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * support a minimal version: BytChk must be 0. */ 28641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_VERIFY: 28651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = 0; 28661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 10, DATA_DIR_NONE, 28671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (1<<1) | (0xf<<2) | (3<<7), 1, 28681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "VERIFY")) == 0) 28691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_verify(fsg); 28701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 28711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_WRITE_6: 28731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i = fsg->cmnd[4]; 28741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = (i == 0 ? 256 : i) << 9; 28751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 6, DATA_DIR_FROM_HOST, 28761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (7<<1) | (1<<4), 1, 28771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "WRITE(6)")) == 0) 28781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_write(fsg); 28791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 28801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_WRITE_10: 28821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]) << 9; 28831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 10, DATA_DIR_FROM_HOST, 28841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (1<<1) | (0xf<<2) | (3<<7), 1, 28851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "WRITE(10)")) == 0) 28861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_write(fsg); 28871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 28881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_WRITE_12: 28901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = get_be32(&fsg->cmnd[6]) << 9; 28911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, 12, DATA_DIR_FROM_HOST, 28921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (1<<1) | (0xf<<2) | (0xf<<6), 1, 28931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "WRITE(12)")) == 0) 28941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = do_write(fsg); 28951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 28961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 28971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Some mandatory commands that we recognize but don't implement. 28981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * They don't mean much in this setting. It's left as an exercise 28991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * for anyone interested to implement RESERVE and RELEASE in terms 29001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * of Posix locks. */ 29011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_FORMAT_UNIT: 29021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_RELEASE: 29031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_RESERVE: 29041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case SC_SEND_DIAGNOSTIC: 29051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // Fall through 29061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 29081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size_from_cmnd = 0; 29091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sprintf(unknown, "Unknown x%02x", fsg->cmnd[0]); 29101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((reply = check_command(fsg, fsg->cmnd_size, 29111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DATA_DIR_UNKNOWN, 0xff, 0, unknown)) == 0) { 29121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->curlun->sense_data = SS_INVALID_COMMAND; 29131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = -EINVAL; 29141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 29151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 29161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 29171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up_read(&fsg->filesem); 29181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (reply == -EINTR || signal_pending(current)) 29201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINTR; 29211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set up the single reply buffer for finish_reply() */ 29231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (reply == -EINVAL) 29241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = 0; // Error reply length 29251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (reply >= 0 && fsg->data_dir == DATA_DIR_TO_HOST) { 29261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds reply = min((u32) reply, fsg->data_size_from_cmnd); 29271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq->length = reply; 29281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->state = BUF_STATE_FULL; 29291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->residue -= reply; 29301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } // Otherwise it's already set 29311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 29331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 29341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 29371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int received_cbw(struct fsg_dev *fsg, struct fsg_buffhd *bh) 29391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 29401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_request *req = bh->outreq; 29417ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct bulk_cb_wrap *cbw = req->buf; 29421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Was this a real packet? */ 29441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req->status) 29451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 29461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Is the CBW valid? */ 29481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req->actual != USB_BULK_CB_WRAP_LEN || 29491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cbw->Signature != __constant_cpu_to_le32( 29501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds USB_BULK_CB_SIG)) { 29511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "invalid CBW: len %u sig 0x%x\n", 29521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds req->actual, 29531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds le32_to_cpu(cbw->Signature)); 29541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The Bulk-only spec says we MUST stall the bulk pipes! 29561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If we want to avoid stalls, set a flag so that we will 29571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * clear the endpoint halts at the next reset. */ 29581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!mod_data.can_stall) 29591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_bit(CLEAR_BULK_HALTS, &fsg->atomic_bitflags); 29601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg_set_halt(fsg, fsg->bulk_out); 29611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds halt_bulk_in_endpoint(fsg); 29621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 29631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 29641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Is the CBW meaningful? */ 29661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cbw->Lun >= MAX_LUNS || cbw->Flags & ~USB_BULK_IN_FLAG || 296712943f097e5a4a0550f52f98ab8f476435e2ce15Alan Stern cbw->Length <= 0 || cbw->Length > MAX_COMMAND_SIZE) { 29681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "non-meaningful CBW: lun = %u, flags = 0x%x, " 29691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "cmdlen %u\n", 29701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds cbw->Lun, cbw->Flags, cbw->Length); 29711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We can do anything we want here, so let's stall the 29731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * bulk pipes if we are allowed to. */ 29741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mod_data.can_stall) { 29751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg_set_halt(fsg, fsg->bulk_out); 29761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds halt_bulk_in_endpoint(fsg); 29771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 29781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 29791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 29801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Save the command for later */ 29821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->cmnd_size = cbw->Length; 29831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(fsg->cmnd, cbw->CDB, fsg->cmnd_size); 29841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (cbw->Flags & USB_BULK_IN_FLAG) 29851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_dir = DATA_DIR_TO_HOST; 29861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 29871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_dir = DATA_DIR_FROM_HOST; 29881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_size = le32_to_cpu(cbw->DataTransferLength); 29891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->data_size == 0) 29901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_dir = DATA_DIR_NONE; 29911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->lun = cbw->Lun; 29921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->tag = cbw->Tag; 29931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 29941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 29951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 29971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int get_next_command(struct fsg_dev *fsg) 29981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 29991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh; 30001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc = 0; 30011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (transport_is_bbb()) { 30031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Wait for the next buffer to become available */ 30051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh = fsg->next_buffhd_to_fill; 30061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (bh->state != BUF_STATE_EMPTY) { 300779a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern rc = sleep_thread(fsg); 300879a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern if (rc) 30091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 301079a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern } 30111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Queue a request to read a Bulk-only CBW */ 30131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_bulk_out_req_length(fsg, bh, USB_BULK_CB_WRAP_LEN); 301470ffe6e14d7c5db84b92841471ce6fd0200010cdAlan Stern bh->outreq->short_not_ok = 1; 30151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds start_transfer(fsg, fsg->bulk_out, bh->outreq, 30161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &bh->outreq_busy, &bh->state); 30171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We will drain the buffer in software, which means we 30191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * can reuse it for the next filling. No need to advance 30201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * next_buffhd_to_fill. */ 30211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Wait for the CBW to arrive */ 30231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (bh->state != BUF_STATE_FULL) { 302479a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern rc = sleep_thread(fsg); 302579a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern if (rc) 30261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 302779a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern } 3028a21d4fed4b00eaf7e7c3b2e2b25de24f540bfa66Alan Stern smp_rmb(); 30291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = received_cbw(fsg, bh); 30301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->state = BUF_STATE_EMPTY; 30311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { // USB_PR_CB or USB_PR_CBI 30331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Wait for the next command to arrive */ 30351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (fsg->cbbuf_cmnd_size == 0) { 303679a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern rc = sleep_thread(fsg); 303779a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern if (rc) 30381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 303979a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern } 30401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Is the previous status interrupt request still busy? 30421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The host is allowed to skip reading the status, 30431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * so we must cancel it. */ 30441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->intreq_busy) 30451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_dequeue(fsg->intr_in, fsg->intreq); 30461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Copy the command and mark the buffer empty */ 30481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->data_dir = DATA_DIR_UNKNOWN; 30491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq(&fsg->lock); 30501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->cmnd_size = fsg->cbbuf_cmnd_size; 30511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memcpy(fsg->cmnd, fsg->cbbuf_cmnd, fsg->cmnd_size); 30521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->cbbuf_cmnd_size = 0; 30531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq(&fsg->lock); 30541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 30551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 30561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 30571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 30601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int enable_endpoint(struct fsg_dev *fsg, struct usb_ep *ep, 30621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const struct usb_endpoint_descriptor *d) 30631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 30641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 30651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep->driver_data = fsg; 30671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = usb_ep_enable(ep, d); 30681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc) 30691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ERROR(fsg, "can't enable %s, result %d\n", ep->name, rc); 30701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 30711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 30721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int alloc_request(struct fsg_dev *fsg, struct usb_ep *ep, 30741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_request **preq) 30751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 30761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *preq = usb_ep_alloc_request(ep, GFP_ATOMIC); 30771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (*preq) 30781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 30791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ERROR(fsg, "can't allocate request for %s\n", ep->name); 30801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOMEM; 30811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 30821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 30841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Reset interface setting and re-init endpoint state (toggle etc). 30851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Call with altsetting < 0 to disable the interface. The only other 30861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * available altsetting is 0, which enables the interface. 30871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 30881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_set_interface(struct fsg_dev *fsg, int altsetting) 30891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 30901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc = 0; 30911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 30921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const struct usb_endpoint_descriptor *d; 30931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->running) 30951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "reset interface\n"); 30961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 30971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsreset: 30981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Deallocate the requests */ 30991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < NUM_BUFFERS; ++i) { 31001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh = &fsg->buffhds[i]; 31011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bh->inreq) { 31031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_free_request(fsg->bulk_in, bh->inreq); 31041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq = NULL; 31051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 31061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bh->outreq) { 31071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_free_request(fsg->bulk_out, bh->outreq); 31081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->outreq = NULL; 31091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 31101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 31111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->intreq) { 31121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_free_request(fsg->intr_in, fsg->intreq); 31131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->intreq = NULL; 31141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 31151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Disable the endpoints */ 31171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->bulk_in_enabled) { 31181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_disable(fsg->bulk_in); 31191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->bulk_in_enabled = 0; 31201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 31211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->bulk_out_enabled) { 31221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_disable(fsg->bulk_out); 31231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->bulk_out_enabled = 0; 31241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 31251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->intr_in_enabled) { 31261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_disable(fsg->intr_in); 31271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->intr_in_enabled = 0; 31281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 31291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->running = 0; 31311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (altsetting < 0 || rc != 0) 31321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 31331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "set interface %d\n", altsetting); 31351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Enable the endpoints */ 31371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds d = ep_desc(fsg->gadget, &fs_bulk_in_desc, &hs_bulk_in_desc); 31381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((rc = enable_endpoint(fsg, fsg->bulk_in, d)) != 0) 31391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto reset; 31401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->bulk_in_enabled = 1; 31411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds d = ep_desc(fsg->gadget, &fs_bulk_out_desc, &hs_bulk_out_desc); 31431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((rc = enable_endpoint(fsg, fsg->bulk_out, d)) != 0) 31441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto reset; 31451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->bulk_out_enabled = 1; 31461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->bulk_out_maxpacket = le16_to_cpu(d->wMaxPacketSize); 31471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (transport_is_cbi()) { 31491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds d = ep_desc(fsg->gadget, &fs_intr_in_desc, &hs_intr_in_desc); 31501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((rc = enable_endpoint(fsg, fsg->intr_in, d)) != 0) 31511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto reset; 31521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->intr_in_enabled = 1; 31531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 31541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Allocate the requests */ 31561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < NUM_BUFFERS; ++i) { 31571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh = &fsg->buffhds[i]; 31581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((rc = alloc_request(fsg, fsg->bulk_in, &bh->inreq)) != 0) 31601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto reset; 31611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((rc = alloc_request(fsg, fsg->bulk_out, &bh->outreq)) != 0) 31621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto reset; 31631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq->buf = bh->outreq->buf = bh->buf; 31641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq->context = bh->outreq->context = bh; 31651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->inreq->complete = bulk_in_complete; 31661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->outreq->complete = bulk_out_complete; 31671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 31681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (transport_is_cbi()) { 31691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((rc = alloc_request(fsg, fsg->intr_in, &fsg->intreq)) != 0) 31701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto reset; 31711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->intreq->complete = intr_in_complete; 31721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 31731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->running = 1; 31751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < fsg->nluns; ++i) 31761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->luns[i].unit_attention_data = SS_RESET_OCCURRED; 31771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 31781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 31791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 31821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Change our operational configuration. This code must agree with the code 31831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * that returns config descriptors, and with interface altsetting code. 31841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 31851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * It's also responsible for power management interactions. Some 31861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * configurations might not work with our current power sources. 31871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * For now we just assume the gadget is always self-powered. 31881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 31891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int do_set_config(struct fsg_dev *fsg, u8 new_config) 31901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 31911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc = 0; 31921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 31931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Disable the single interface */ 31941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->config != 0) { 31951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "reset config\n"); 31961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->config = 0; 31971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = do_set_interface(fsg, -1); 31981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 31991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Enable the interface */ 32011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (new_config != 0) { 32021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->config = new_config; 32031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((rc = do_set_interface(fsg, 0)) != 0) 32041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->config = 0; // Reset on errors 32051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 32061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *speed; 32071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (fsg->gadget->speed) { 32091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_LOW: speed = "low"; break; 32101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_FULL: speed = "full"; break; 32111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case USB_SPEED_HIGH: speed = "high"; break; 32121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: speed = "?"; break; 32131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 32141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INFO(fsg, "%s speed config #%d\n", speed, fsg->config); 32151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 32161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 32171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 32181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 32191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 32221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void handle_exception(struct fsg_dev *fsg) 32241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 32251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds siginfo_t info; 32261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int sig; 32271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 32281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int num_active; 32291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh; 32301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds enum fsg_state old_state; 32311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u8 new_config; 32321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun; 32331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int exception_req_tag; 32341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 32351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Clear the existing signals. Anything but SIGUSR1 is converted 32371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * into a high-priority EXIT exception. */ 32381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (;;) { 32398cfbe7e60d9618d8f80a3cd218c45dd64cb9e5cfOleg Nesterov sig = dequeue_signal_lock(current, ¤t->blocked, &info); 32401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!sig) 32411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 32421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (sig != SIGUSR1) { 32431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->state < FSG_STATE_EXIT) 32441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "Main thread exiting on signal\n"); 32451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds raise_exception(fsg, FSG_STATE_EXIT); 32461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 32471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 32481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Cancel all the pending transfers */ 32501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->intreq_busy) 32511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_dequeue(fsg->intr_in, fsg->intreq); 32521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < NUM_BUFFERS; ++i) { 32531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh = &fsg->buffhds[i]; 32541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bh->inreq_busy) 32551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_dequeue(fsg->bulk_in, bh->inreq); 32561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bh->outreq_busy) 32571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_dequeue(fsg->bulk_out, bh->outreq); 32581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 32591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Wait until everything is idle */ 32611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (;;) { 32621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds num_active = fsg->intreq_busy; 32631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < NUM_BUFFERS; ++i) { 32641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh = &fsg->buffhds[i]; 32651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds num_active += bh->inreq_busy + bh->outreq_busy; 32661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 32671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (num_active == 0) 32681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 32691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (sleep_thread(fsg)) 32701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 32711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 32721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Clear out the controller's fifos */ 32741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->bulk_in_enabled) 32751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_fifo_flush(fsg->bulk_in); 32761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->bulk_out_enabled) 32771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_fifo_flush(fsg->bulk_out); 32781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->intr_in_enabled) 32791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_fifo_flush(fsg->intr_in); 32801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Reset the I/O buffer states and pointers, the SCSI 32821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * state, and the exception. Then invoke the handler. */ 32831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq(&fsg->lock); 32841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < NUM_BUFFERS; ++i) { 32861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh = &fsg->buffhds[i]; 32871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->state = BUF_STATE_EMPTY; 32881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 32891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->next_buffhd_to_fill = fsg->next_buffhd_to_drain = 32901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &fsg->buffhds[0]; 32911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds exception_req_tag = fsg->exception_req_tag; 32931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds new_config = fsg->new_config; 32941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds old_state = fsg->state; 32951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 32961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (old_state == FSG_STATE_ABORT_BULK_OUT) 32971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->state = FSG_STATE_STATUS_PHASE; 32981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 32991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < fsg->nluns; ++i) { 33001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun = &fsg->luns[i]; 33011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->prevent_medium_removal = 0; 33021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data = curlun->unit_attention_data = 33031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SS_NO_SENSE; 33041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->sense_data_info = 0; 33056174d0fd35f486f59b743630bdf088a9f9792d4dAlan Stern curlun->info_valid = 0; 33061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 33071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->state = FSG_STATE_IDLE; 33081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 33091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq(&fsg->lock); 33101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Carry out any extra actions required for the exception */ 33121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds switch (old_state) { 33131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds default: 33141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 33151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FSG_STATE_ABORT_BULK_OUT: 33171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds send_status(fsg); 33181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq(&fsg->lock); 33191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->state == FSG_STATE_STATUS_PHASE) 33201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->state = FSG_STATE_IDLE; 33211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq(&fsg->lock); 33221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 33231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FSG_STATE_RESET: 33251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* In case we were forced against our will to halt a 33261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * bulk endpoint, clear the halt now. (The SuperH UDC 33271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * requires this.) */ 33281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (test_and_clear_bit(CLEAR_BULK_HALTS, 33291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &fsg->atomic_bitflags)) { 33301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_clear_halt(fsg->bulk_in); 33311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_clear_halt(fsg->bulk_out); 33321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 33331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (transport_is_bbb()) { 33351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->ep0_req_tag == exception_req_tag) 33361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep0_queue(fsg); // Complete the status stage 33371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (transport_is_cbi()) 33391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds send_status(fsg); // Status by interrupt pipe 33401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Technically this should go here, but it would only be 33421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * a waste of time. Ditto for the INTERFACE_CHANGE and 33431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * CONFIG_CHANGE cases. */ 33441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // for (i = 0; i < fsg->nluns; ++i) 33451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // fsg->luns[i].unit_attention_data = SS_RESET_OCCURRED; 33461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 33471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FSG_STATE_INTERFACE_CHANGE: 33491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = do_set_interface(fsg, 0); 33501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->ep0_req_tag != exception_req_tag) 33511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 33521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc != 0) // STALL on errors 33531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg_set_halt(fsg, fsg->ep0); 33541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else // Complete the status stage 33551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep0_queue(fsg); 33561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 33571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FSG_STATE_CONFIG_CHANGE: 33591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = do_set_config(fsg, new_config); 33601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->ep0_req_tag != exception_req_tag) 33611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 33621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc != 0) // STALL on errors 33631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg_set_halt(fsg, fsg->ep0); 33641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else // Complete the status stage 33651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep0_queue(fsg); 33661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 33671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FSG_STATE_DISCONNECT: 33691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsync_all(fsg); 33701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds do_set_config(fsg, 0); // Unconfigured state 33711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 33721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FSG_STATE_EXIT: 33741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds case FSG_STATE_TERMINATED: 33751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds do_set_config(fsg, 0); // Free resources 33761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq(&fsg->lock); 33771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->state = FSG_STATE_TERMINATED; // Stop the thread 33781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq(&fsg->lock); 33791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 33801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 33811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 33821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 33851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int fsg_main_thread(void *fsg_) 33871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 33887ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct fsg_dev *fsg = fsg_; 33891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 33901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Allow the thread to be killed by a signal, but set the signal mask 33911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * to block everything but INT, TERM, KILL, and USR1. */ 33928cfbe7e60d9618d8f80a3cd218c45dd64cb9e5cfOleg Nesterov allow_signal(SIGINT); 33938cfbe7e60d9618d8f80a3cd218c45dd64cb9e5cfOleg Nesterov allow_signal(SIGTERM); 33948cfbe7e60d9618d8f80a3cd218c45dd64cb9e5cfOleg Nesterov allow_signal(SIGKILL); 33958cfbe7e60d9618d8f80a3cd218c45dd64cb9e5cfOleg Nesterov allow_signal(SIGUSR1); 33961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3397831441862956fffa17b9801db37e6ea1650b0f69Rafael J. Wysocki /* Allow the thread to be frozen */ 3398831441862956fffa17b9801db37e6ea1650b0f69Rafael J. Wysocki set_freezable(); 3399831441862956fffa17b9801db37e6ea1650b0f69Rafael J. Wysocki 34001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Arrange for userspace references to be interpreted as kernel 34011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * pointers. That way we can pass a kernel pointer to a routine 34021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * that expects a __user pointer and it will work okay. */ 34031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_fs(get_ds()); 34041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The main loop */ 34061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds while (fsg->state != FSG_STATE_TERMINATED) { 34071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (exception_in_progress(fsg) || signal_pending(current)) { 34081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds handle_exception(fsg); 34091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 34101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 34111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!fsg->running) { 34131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sleep_thread(fsg); 34141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 34151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 34161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (get_next_command(fsg)) 34181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 34191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq(&fsg->lock); 34211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!exception_in_progress(fsg)) 34221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->state = FSG_STATE_DATA_PHASE; 34231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq(&fsg->lock); 34241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (do_scsi_command(fsg) || finish_reply(fsg)) 34261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 34271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq(&fsg->lock); 34291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!exception_in_progress(fsg)) 34301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->state = FSG_STATE_STATUS_PHASE; 34311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq(&fsg->lock); 34321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (send_status(fsg)) 34341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds continue; 34351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_irq(&fsg->lock); 34371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!exception_in_progress(fsg)) 34381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->state = FSG_STATE_IDLE; 34391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_unlock_irq(&fsg->lock); 34401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 34411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 344222efcf4adec4262e0f49e6225f6cd070e4a85d20Alan Stern spin_lock_irq(&fsg->lock); 34431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->thread_task = NULL; 344422efcf4adec4262e0f49e6225f6cd070e4a85d20Alan Stern spin_unlock_irq(&fsg->lock); 34451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* In case we are exiting because of a signal, unregister the 34471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * gadget driver and close the backing file. */ 34481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (test_and_clear_bit(REGISTERED, &fsg->atomic_bitflags)) { 34491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_gadget_unregister_driver(&fsg_driver); 34501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds close_all_backing_files(fsg); 34511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 34521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Let the unbind and cleanup routines know the thread has exited */ 34541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds complete_and_exit(&fsg->thread_notifier, 0); 34551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 34561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 34591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* If the next two routines are called while the gadget is registered, 34611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the caller must own fsg->filesem for writing. */ 34621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int open_backing_file(struct lun *curlun, const char *filename) 34641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 34651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int ro; 34661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct file *filp = NULL; 34671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc = -EINVAL; 34681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct inode *inode = NULL; 34691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds loff_t size; 34701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds loff_t num_sectors; 34711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* R/W if we can, R/O if we must */ 34731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ro = curlun->ro; 34741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!ro) { 34751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds filp = filp_open(filename, O_RDWR | O_LARGEFILE, 0); 34761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (-EROFS == PTR_ERR(filp)) 34771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ro = 1; 34781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 34791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (ro) 34801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds filp = filp_open(filename, O_RDONLY | O_LARGEFILE, 0); 34811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(filp)) { 34821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LINFO(curlun, "unable to open backing file: %s\n", filename); 34831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return PTR_ERR(filp); 34841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 34851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(filp->f_mode & FMODE_WRITE)) 34871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ro = 1; 34881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 348933cb89940082c54f348062db2f8bab6cf8fed816Josef Sipek if (filp->f_path.dentry) 349033cb89940082c54f348062db2f8bab6cf8fed816Josef Sipek inode = filp->f_path.dentry->d_inode; 34911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (inode && S_ISBLK(inode->i_mode)) { 34921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (bdev_read_only(inode->i_bdev)) 34931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ro = 1; 34941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (!inode || !S_ISREG(inode->i_mode)) { 34951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LINFO(curlun, "invalid file type: %s\n", filename); 34961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 34971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 34981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 34991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If we can't read the file, it's no good. 35001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If we can't write the file, use it read-only. */ 35011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!filp->f_op || !(filp->f_op->read || filp->f_op->aio_read)) { 35021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LINFO(curlun, "file not readable: %s\n", filename); 35031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 35041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 35051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!(filp->f_op->write || filp->f_op->aio_write)) 35061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ro = 1; 35071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size = i_size_read(inode->i_mapping->host); 35091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (size < 0) { 35101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LINFO(curlun, "unable to find file size: %s\n", filename); 35111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = (int) size; 35121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 35131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 35141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds num_sectors = size >> 9; // File size in 512-byte sectors 35151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (num_sectors == 0) { 35161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LINFO(curlun, "file too small: %s\n", filename); 35171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = -ETOOSMALL; 35181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 35191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 35201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds get_file(filp); 35221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->ro = ro; 35231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->filp = filp; 35241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->file_length = size; 35251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->num_sectors = num_sectors; 35261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LDBG(curlun, "open backing file: %s\n", filename); 35271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = 0; 35281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 35301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds filp_close(filp, current->files); 35311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 35321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 35331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void close_backing_file(struct lun *curlun) 35361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 35371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (curlun->filp) { 35381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LDBG(curlun, "close backing file\n"); 35391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fput(curlun->filp); 35401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->filp = NULL; 35411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 35421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 35431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void close_all_backing_files(struct fsg_dev *fsg) 35451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 35461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 35471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < fsg->nluns; ++i) 35491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds close_backing_file(&fsg->luns[i]); 35501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 35511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 355310523b3b82456e416cbaffcc24ea2246980aa746Yani Ioannoustatic ssize_t show_ro(struct device *dev, struct device_attribute *attr, char *buf) 35541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 35551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = dev_to_lun(dev); 35561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return sprintf(buf, "%d\n", curlun->ro); 35581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 35591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 356079a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic ssize_t show_file(struct device *dev, struct device_attribute *attr, 356179a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern char *buf) 35621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 35631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = dev_to_lun(dev); 35647ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct fsg_dev *fsg = dev_get_drvdata(dev); 35651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *p; 35661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ssize_t rc; 35671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds down_read(&fsg->filesem); 35691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (backing_file_is_open(curlun)) { // Get the complete pathname 357079a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern p = d_path(curlun->filp->f_path.dentry, 357179a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern curlun->filp->f_path.mnt, buf, PAGE_SIZE - 1); 35721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) 35731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = PTR_ERR(p); 35741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 35751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = strlen(p); 35761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds memmove(buf, p, rc); 35771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[rc] = '\n'; // Add a newline 35781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds buf[++rc] = 0; 35791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 35801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { // No file, return 0 bytes 35811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *buf = 0; 35821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = 0; 35831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 35841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up_read(&fsg->filesem); 35851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 35861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 35871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 358979a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic ssize_t store_ro(struct device *dev, struct device_attribute *attr, 359079a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern const char *buf, size_t count) 35911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 35921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ssize_t rc = count; 35931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = dev_to_lun(dev); 35947ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct fsg_dev *fsg = dev_get_drvdata(dev); 35951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 35961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 35971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (sscanf(buf, "%d", &i) != 1) 35981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 35991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Allow the write-enable status to change only while the backing file 36011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * is closed. */ 36021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds down_read(&fsg->filesem); 36031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (backing_file_is_open(curlun)) { 36041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LDBG(curlun, "read-only status change prevented\n"); 36051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = -EBUSY; 36061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 36071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->ro = !!i; 36081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LDBG(curlun, "read-only status set to %d\n", curlun->ro); 36091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 36101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up_read(&fsg->filesem); 36111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 36121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 36131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 361479a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Sternstatic ssize_t store_file(struct device *dev, struct device_attribute *attr, 361579a7d9ee1a2e8b8dc44dd217f07496911850ec0eAlan Stern const char *buf, size_t count) 36161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 36171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun = dev_to_lun(dev); 36187ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct fsg_dev *fsg = dev_get_drvdata(dev); 36191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc = 0; 36201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (curlun->prevent_medium_removal && backing_file_is_open(curlun)) { 36221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LDBG(curlun, "eject attempt prevented\n"); 36231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EBUSY; // "Door is locked" 36241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 36251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Remove a trailing newline */ 36271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (count > 0 && buf[count-1] == '\n') 36281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ((char *) buf)[count-1] = 0; // Ugh! 36291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Eject current medium */ 36311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds down_write(&fsg->filesem); 36321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (backing_file_is_open(curlun)) { 36331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds close_backing_file(curlun); 36341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->unit_attention_data = SS_MEDIUM_NOT_PRESENT; 36351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 36361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Load new medium */ 36381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (count > 0 && buf[0]) { 36391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = open_backing_file(curlun, buf); 36401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (rc == 0) 36411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->unit_attention_data = 36421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SS_NOT_READY_TO_READY_TRANSITION; 36431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 36441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up_write(&fsg->filesem); 36451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (rc < 0 ? rc : count); 36461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 36471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* The write permissions and store_xxx pointers are set in fsg_bind() */ 36501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic DEVICE_ATTR(ro, 0444, show_ro, NULL); 36511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic DEVICE_ATTR(file, 0444, show_file, NULL); 36521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 36551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 365687c4252a35310fdbb2aabb880a39b83f83cadf62Alan Sternstatic void fsg_release(struct kref *ref) 365787c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern{ 365887c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern struct fsg_dev *fsg = container_of(ref, struct fsg_dev, ref); 365987c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern 366087c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern kfree(fsg->luns); 366187c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern kfree(fsg); 366287c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern} 366387c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern 36641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void lun_release(struct device *dev) 36651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 36667ca46b862f0e30fe0dcc4a4aef5b32f6b6a3fda5John Daiker struct fsg_dev *fsg = dev_get_drvdata(dev); 36671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 366887c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern kref_put(&fsg->ref, fsg_release); 36691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 36701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3671a353678d3136306c1d00f0d2319de1dac8a6b1dbDavid Brownellstatic void /* __init_or_exit */ fsg_unbind(struct usb_gadget *gadget) 36721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 36731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_dev *fsg = get_gadget_data(gadget); 36741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 36751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun; 36761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_request *req = fsg->ep0req; 36771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "unbind\n"); 36791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_bit(REGISTERED, &fsg->atomic_bitflags); 36801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Unregister the sysfs attribute files and the LUNs */ 36821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < fsg->nluns; ++i) { 36831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun = &fsg->luns[i]; 36841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (curlun->registered) { 36851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device_remove_file(&curlun->dev, &dev_attr_ro); 36861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device_remove_file(&curlun->dev, &dev_attr_file); 36871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device_unregister(&curlun->dev); 36881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->registered = 0; 36891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 36901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 36911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* If the thread isn't already dead, tell it to exit now */ 36931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (fsg->state != FSG_STATE_TERMINATED) { 36941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds raise_exception(fsg, FSG_STATE_EXIT); 36951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wait_for_completion(&fsg->thread_notifier); 36961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 36971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The cleanup routine waits for this completion also */ 36981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds complete(&fsg->thread_notifier); 36991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 37001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Free the data buffers */ 37029d8bab58b758cd5a96d368a8cc64111c9ab50407David Brownell for (i = 0; i < NUM_BUFFERS; ++i) 37039d8bab58b758cd5a96d368a8cc64111c9ab50407David Brownell kfree(fsg->buffhds[i].buf); 37041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Free the request and buffer for endpoint 0 */ 37061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (req) { 37079d8bab58b758cd5a96d368a8cc64111c9ab50407David Brownell kfree(req->buf); 37081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_free_request(fsg->ep0, req); 37091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 37101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_gadget_data(gadget, NULL); 37121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 37131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int __init check_parameters(struct fsg_dev *fsg) 37161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 37171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int prot; 371891e79c91fab10f5790159d8d0c1d16da2a9653f9David Brownell int gcnum; 37191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Store the default values */ 37211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.transport_type = USB_PR_BULK; 37221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.transport_name = "Bulk-only"; 37231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.protocol_type = USB_SC_SCSI; 37241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.protocol_name = "Transparent SCSI"; 37251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (gadget_is_sh(fsg->gadget)) 37271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.can_stall = 0; 37281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mod_data.release == 0xffff) { // Parameter wasn't set 37301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The sa1100 controller is not supported */ 373191e79c91fab10f5790159d8d0c1d16da2a9653f9David Brownell if (gadget_is_sa1100(fsg->gadget)) 373291e79c91fab10f5790159d8d0c1d16da2a9653f9David Brownell gcnum = -1; 373391e79c91fab10f5790159d8d0c1d16da2a9653f9David Brownell else 373491e79c91fab10f5790159d8d0c1d16da2a9653f9David Brownell gcnum = usb_gadget_controller_number(fsg->gadget); 373591e79c91fab10f5790159d8d0c1d16da2a9653f9David Brownell if (gcnum >= 0) 373691e79c91fab10f5790159d8d0c1d16da2a9653f9David Brownell mod_data.release = 0x0300 + gcnum; 37371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 37381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds WARN(fsg, "controller '%s' not recognized\n", 37391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->gadget->name); 37401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.release = 0x0399; 37411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 37421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 37431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prot = simple_strtol(mod_data.protocol_parm, NULL, 0); 37451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_FILE_STORAGE_TEST 37471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (strnicmp(mod_data.transport_parm, "BBB", 10) == 0) { 37481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ; // Use default setting 37491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (strnicmp(mod_data.transport_parm, "CB", 10) == 0) { 37501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.transport_type = USB_PR_CB; 37511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.transport_name = "Control-Bulk"; 37521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (strnicmp(mod_data.transport_parm, "CBI", 10) == 0) { 37531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.transport_type = USB_PR_CBI; 37541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.transport_name = "Control-Bulk-Interrupt"; 37551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 37561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ERROR(fsg, "invalid transport: %s\n", mod_data.transport_parm); 37571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 37581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 37591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (strnicmp(mod_data.protocol_parm, "SCSI", 10) == 0 || 37611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prot == USB_SC_SCSI) { 37621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ; // Use default setting 37631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (strnicmp(mod_data.protocol_parm, "RBC", 10) == 0 || 37641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prot == USB_SC_RBC) { 37651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.protocol_type = USB_SC_RBC; 37661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.protocol_name = "RBC"; 37671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (strnicmp(mod_data.protocol_parm, "8020", 4) == 0 || 37681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds strnicmp(mod_data.protocol_parm, "ATAPI", 10) == 0 || 37691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prot == USB_SC_8020) { 37701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.protocol_type = USB_SC_8020; 37711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.protocol_name = "8020i (ATAPI)"; 37721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (strnicmp(mod_data.protocol_parm, "QIC", 3) == 0 || 37731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prot == USB_SC_QIC) { 37741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.protocol_type = USB_SC_QIC; 37751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.protocol_name = "QIC-157"; 37761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (strnicmp(mod_data.protocol_parm, "UFI", 10) == 0 || 37771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prot == USB_SC_UFI) { 37781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.protocol_type = USB_SC_UFI; 37791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.protocol_name = "UFI"; 37801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (strnicmp(mod_data.protocol_parm, "8070", 4) == 0 || 37811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds prot == USB_SC_8070) { 37821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.protocol_type = USB_SC_8070; 37831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.protocol_name = "8070i"; 37841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 37851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ERROR(fsg, "invalid protocol: %s\n", mod_data.protocol_parm); 37861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 37871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 37881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.buflen &= PAGE_CACHE_MASK; 37901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mod_data.buflen <= 0) { 37911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ERROR(fsg, "invalid buflen\n"); 37921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ETOOSMALL; 37931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 37941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif /* CONFIG_USB_FILE_STORAGE_TEST */ 37951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 37971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 37981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 37991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int __init fsg_bind(struct usb_gadget *gadget) 38011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 38021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_dev *fsg = the_fsg; 38031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 38041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 38051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct lun *curlun; 38061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_ep *ep; 38071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct usb_request *req; 38081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *pathbuf, *p; 38091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->gadget = gadget; 38111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_gadget_data(gadget, fsg); 38121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->ep0 = gadget->ep0; 38131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->ep0->driver_data = fsg; 38141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((rc = check_parameters(fsg)) != 0) 38161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 38171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (mod_data.removable) { // Enable the store_xxx attributes 38191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_attr_ro.attr.mode = dev_attr_file.attr.mode = 0644; 38201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_attr_ro.store = store_ro; 38211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_attr_file.store = store_file; 38221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 38231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Find out how many LUNs there should be */ 38251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i = mod_data.nluns; 38261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (i == 0) 38272e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell i = max(mod_data.num_filenames, 1u); 38281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (i > MAX_LUNS) { 38291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ERROR(fsg, "invalid number of LUNs: %d\n", i); 38301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = -EINVAL; 38311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 38321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 38331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Create the LUNs, open their backing files, and register the 38351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * LUN devices in sysfs. */ 3836a922c68732725866c88457026cf06a7620846506Alan Stern fsg->luns = kzalloc(i * sizeof(struct lun), GFP_KERNEL); 38371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!fsg->luns) { 38381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = -ENOMEM; 38391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 38401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 38411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->nluns = i; 38421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < fsg->nluns; ++i) { 38441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun = &fsg->luns[i]; 3845aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern curlun->ro = mod_data.ro[i]; 38462de9eaefa7330b8e3d3fc5f31288cb1e826173a8Alan Stern curlun->dev.release = lun_release; 38471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->dev.parent = &gadget->dev; 38481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->dev.driver = &fsg_driver.driver; 38491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds dev_set_drvdata(&curlun->dev, fsg); 38501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds snprintf(curlun->dev.bus_id, BUS_ID_SIZE, 38511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds "%s-lun%d", gadget->dev.bus_id, i); 38521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38532de9eaefa7330b8e3d3fc5f31288cb1e826173a8Alan Stern if ((rc = device_register(&curlun->dev)) != 0) { 38541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INFO(fsg, "failed to register LUN%d: %d\n", i, rc); 38552de9eaefa7330b8e3d3fc5f31288cb1e826173a8Alan Stern goto out; 38562de9eaefa7330b8e3d3fc5f31288cb1e826173a8Alan Stern } 38572de9eaefa7330b8e3d3fc5f31288cb1e826173a8Alan Stern if ((rc = device_create_file(&curlun->dev, 38582de9eaefa7330b8e3d3fc5f31288cb1e826173a8Alan Stern &dev_attr_ro)) != 0 || 38592de9eaefa7330b8e3d3fc5f31288cb1e826173a8Alan Stern (rc = device_create_file(&curlun->dev, 38602de9eaefa7330b8e3d3fc5f31288cb1e826173a8Alan Stern &dev_attr_file)) != 0) { 38612de9eaefa7330b8e3d3fc5f31288cb1e826173a8Alan Stern device_unregister(&curlun->dev); 38622de9eaefa7330b8e3d3fc5f31288cb1e826173a8Alan Stern goto out; 38631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 38642de9eaefa7330b8e3d3fc5f31288cb1e826173a8Alan Stern curlun->registered = 1; 38652de9eaefa7330b8e3d3fc5f31288cb1e826173a8Alan Stern kref_get(&fsg->ref); 38661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3867aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern if (mod_data.file[i] && *mod_data.file[i]) { 3868aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern if ((rc = open_backing_file(curlun, 3869aafe5bd6ec341edfaf3233d272febbb8862a7251Alan Stern mod_data.file[i])) != 0) 38701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 38711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else if (!mod_data.removable) { 38721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ERROR(fsg, "no file given for LUN%d\n", i); 38731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = -EINVAL; 38741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 38751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 38761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 38771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Find all the endpoints we will use */ 38791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_ep_autoconfig_reset(gadget); 38801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep = usb_ep_autoconfig(gadget, &fs_bulk_in_desc); 38811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!ep) 38821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto autoconf_fail; 38831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep->driver_data = fsg; // claim the endpoint 38841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->bulk_in = ep; 38851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep = usb_ep_autoconfig(gadget, &fs_bulk_out_desc); 38871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!ep) 38881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto autoconf_fail; 38891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep->driver_data = fsg; // claim the endpoint 38901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->bulk_out = ep; 38911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 38921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (transport_is_cbi()) { 38931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep = usb_ep_autoconfig(gadget, &fs_intr_in_desc); 38941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!ep) 38951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto autoconf_fail; 38961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ep->driver_data = fsg; // claim the endpoint 38971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->intr_in = ep; 38981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 38991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Fix up the descriptors */ 39011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device_desc.bMaxPacketSize0 = fsg->ep0->maxpacket; 39021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device_desc.idVendor = cpu_to_le16(mod_data.vendor); 39031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device_desc.idProduct = cpu_to_le16(mod_data.product); 39041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds device_desc.bcdDevice = cpu_to_le16(mod_data.release); 39051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i = (transport_is_cbi() ? 3 : 2); // Number of endpoints 39071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds intf_desc.bNumEndpoints = i; 39081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds intf_desc.bInterfaceSubClass = mod_data.protocol_type; 39091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds intf_desc.bInterfaceProtocol = mod_data.transport_type; 39101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fs_function[i + FS_FUNCTION_PRE_EP_ENTRIES] = NULL; 39111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39122e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell if (gadget_is_dualspeed(gadget)) { 39132e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell hs_function[i + HS_FUNCTION_PRE_EP_ENTRIES] = NULL; 39141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39152e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell /* Assume ep0 uses the same maxpacket value for both speeds */ 39162e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell dev_qualifier.bMaxPacketSize0 = fsg->ep0->maxpacket; 39171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39182e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell /* Assume endpoint addresses are the same for both speeds */ 39192e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell hs_bulk_in_desc.bEndpointAddress = 39202e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell fs_bulk_in_desc.bEndpointAddress; 39212e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell hs_bulk_out_desc.bEndpointAddress = 39222e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell fs_bulk_out_desc.bEndpointAddress; 39232e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell hs_intr_in_desc.bEndpointAddress = 39242e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell fs_intr_in_desc.bEndpointAddress; 39252e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell } 39261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39272e806f67cc570d25395469a0ded0df8ffbd4d82fDavid Brownell if (gadget_is_otg(gadget)) 3928020363384adfb02f26c1c038a127ed3da3d5cf37Tony Lindgren otg_desc.bmAttributes |= USB_OTG_HNP; 39291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = -ENOMEM; 39311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Allocate the request and buffer for endpoint 0 */ 39331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->ep0req = req = usb_ep_alloc_request(fsg->ep0, GFP_KERNEL); 39341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!req) 39351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 39369d8bab58b758cd5a96d368a8cc64111c9ab50407David Brownell req->buf = kmalloc(EP0_BUFSIZE, GFP_KERNEL); 39371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!req->buf) 39381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 39391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds req->complete = ep0_complete; 39401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Allocate the data buffers */ 39421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < NUM_BUFFERS; ++i) { 39431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_buffhd *bh = &fsg->buffhds[i]; 39441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 394514cd5f8e85e90c9dead2393377b9a2c23131e0ceAlan Stern /* Allocate for the bulk-in endpoint. We assume that 394614cd5f8e85e90c9dead2393377b9a2c23131e0ceAlan Stern * the buffer will also work with the bulk-out (and 394714cd5f8e85e90c9dead2393377b9a2c23131e0ceAlan Stern * interrupt-in) endpoint. */ 39489d8bab58b758cd5a96d368a8cc64111c9ab50407David Brownell bh->buf = kmalloc(mod_data.buflen, GFP_KERNEL); 39491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!bh->buf) 39501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 39511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds bh->next = bh + 1; 39521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 39531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->buffhds[NUM_BUFFERS - 1].next = &fsg->buffhds[0]; 39541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* This should reflect the actual gadget power source */ 39561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_gadget_set_selfpowered(gadget); 39571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds snprintf(manufacturer, sizeof manufacturer, "%s %s with %s", 395996b644bdec977b97a45133e5b4466ba47a7a5e65Serge E. Hallyn init_utsname()->sysname, init_utsname()->release, 39601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds gadget->name); 39611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* On a real device, serial[] would be loaded from permanent 39631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * storage. We just encode it from the driver version string. */ 39641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < sizeof(serial) - 2; i += 2) { 39651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned char c = DRIVER_VERSION[i / 2]; 39661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!c) 39681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds break; 39691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sprintf(&serial[i], "%02X", c); 39701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 39711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 397222efcf4adec4262e0f49e6225f6cd070e4a85d20Alan Stern fsg->thread_task = kthread_create(fsg_main_thread, fsg, 397322efcf4adec4262e0f49e6225f6cd070e4a85d20Alan Stern "file-storage-gadget"); 397422efcf4adec4262e0f49e6225f6cd070e4a85d20Alan Stern if (IS_ERR(fsg->thread_task)) { 397522efcf4adec4262e0f49e6225f6cd070e4a85d20Alan Stern rc = PTR_ERR(fsg->thread_task); 39761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds goto out; 397722efcf4adec4262e0f49e6225f6cd070e4a85d20Alan Stern } 39781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INFO(fsg, DRIVER_DESC ", version: " DRIVER_VERSION "\n"); 39801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds INFO(fsg, "Number of LUNs=%d\n", fsg->nluns); 39811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 39821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pathbuf = kmalloc(PATH_MAX, GFP_KERNEL); 39831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 0; i < fsg->nluns; ++i) { 39841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun = &fsg->luns[i]; 39851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (backing_file_is_open(curlun)) { 39861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = NULL; 39871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (pathbuf) { 398833cb89940082c54f348062db2f8bab6cf8fed816Josef Sipek p = d_path(curlun->filp->f_path.dentry, 398933cb89940082c54f348062db2f8bab6cf8fed816Josef Sipek curlun->filp->f_path.mnt, 39901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pathbuf, PATH_MAX); 39911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (IS_ERR(p)) 39921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds p = NULL; 39931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 39941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds LINFO(curlun, "ro=%d, file: %s\n", 39951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds curlun->ro, (p ? p : "(error)")); 39961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 39971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 39981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds kfree(pathbuf); 39991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "transport=%s (x%02x)\n", 40011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.transport_name, mod_data.transport_type); 40021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "protocol=%s (x%02x)\n", 40031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.protocol_name, mod_data.protocol_type); 40041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "VendorID=x%04x, ProductID=x%04x, Release=x%04x\n", 40051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.vendor, mod_data.product, mod_data.release); 40061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "removable=%d, stall=%d, buflen=%u\n", 40071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.removable, mod_data.can_stall, 40081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mod_data.buflen); 400922efcf4adec4262e0f49e6225f6cd070e4a85d20Alan Stern DBG(fsg, "I/O thread pid: %d\n", fsg->thread_task->pid); 4010a922c68732725866c88457026cf06a7620846506Alan Stern 4011a922c68732725866c88457026cf06a7620846506Alan Stern set_bit(REGISTERED, &fsg->atomic_bitflags); 4012a922c68732725866c88457026cf06a7620846506Alan Stern 4013a922c68732725866c88457026cf06a7620846506Alan Stern /* Tell the thread to start working */ 4014a922c68732725866c88457026cf06a7620846506Alan Stern wake_up_process(fsg->thread_task); 40151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 40161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsautoconf_fail: 40181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ERROR(fsg, "unable to autoconfigure all endpoints\n"); 40191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds rc = -ENOTSUPP; 40201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsout: 40221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg->state = FSG_STATE_TERMINATED; // The thread is dead 40231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg_unbind(gadget); 40241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds close_all_backing_files(fsg); 40251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 40261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 40271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 40301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void fsg_suspend(struct usb_gadget *gadget) 40321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 40331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_dev *fsg = get_gadget_data(gadget); 40341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "suspend\n"); 40361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_bit(SUSPENDED, &fsg->atomic_bitflags); 40371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 40381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void fsg_resume(struct usb_gadget *gadget) 40401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 40411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_dev *fsg = get_gadget_data(gadget); 40421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DBG(fsg, "resume\n"); 40441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds clear_bit(SUSPENDED, &fsg->atomic_bitflags); 40451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 40461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*-------------------------------------------------------------------------*/ 40491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct usb_gadget_driver fsg_driver = { 40511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_USB_GADGET_DUALSPEED 40521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .speed = USB_SPEED_HIGH, 40531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#else 40541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .speed = USB_SPEED_FULL, 40551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 40561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .function = (char *) longname, 40571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .bind = fsg_bind, 40586bea476cf628eb7bb18a036ac6a8fed1ad319951David Brownell .unbind = fsg_unbind, 40591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .disconnect = fsg_disconnect, 40601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .setup = fsg_setup, 40611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .suspend = fsg_suspend, 40621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .resume = fsg_resume, 40631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .driver = { 40651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .name = (char *) shortname, 4066d0d5049fb02fc1082c17e08deecd6fed8db549b6Ben Dooks .owner = THIS_MODULE, 40671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // .release = ... 40681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // .suspend = ... 40691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds // .resume = ... 40701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds }, 40711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 40721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int __init fsg_alloc(void) 40751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 40761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_dev *fsg; 40771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4078a922c68732725866c88457026cf06a7620846506Alan Stern fsg = kzalloc(sizeof *fsg, GFP_KERNEL); 40791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!fsg) 40801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENOMEM; 40811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds spin_lock_init(&fsg->lock); 40821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_rwsem(&fsg->filesem); 408387c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern kref_init(&fsg->ref); 40841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds init_completion(&fsg->thread_notifier); 40851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds the_fsg = fsg; 40871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 40881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 40891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int __init fsg_init(void) 40921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 40931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int rc; 40941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_dev *fsg; 40951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 40961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((rc = fsg_alloc()) != 0) 40971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return rc; 40981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds fsg = the_fsg; 4099a922c68732725866c88457026cf06a7620846506Alan Stern if ((rc = usb_gadget_register_driver(&fsg_driver)) != 0) 410087c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern kref_put(&fsg->ref, fsg_release); 4101a922c68732725866c88457026cf06a7620846506Alan Stern return rc; 41021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 41031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_init(fsg_init); 41041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void __exit fsg_cleanup(void) 41071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 41081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct fsg_dev *fsg = the_fsg; 41091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Unregister the driver iff the thread hasn't already done so */ 41111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (test_and_clear_bit(REGISTERED, &fsg->atomic_bitflags)) 41121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_gadget_unregister_driver(&fsg_driver); 41131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Wait for the thread to finish up */ 41151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wait_for_completion(&fsg->thread_notifier); 41161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds close_all_backing_files(fsg); 411887c4252a35310fdbb2aabb880a39b83f83cadf62Alan Stern kref_put(&fsg->ref, fsg_release); 41191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 41201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_exit(fsg_cleanup); 4121