11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Driver for USB Mass Storage compliant devices 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * SCSI layer glue code 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Current development and maintenance by: 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (c) 1999-2002 Matthew Dharm (mdharm-usb@one-eyed-alien.net) 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Developed with the assistance of: 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (c) 2000 David L. Brown, Jr. (usb-storage@davidb.org) 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (c) 2000 Stephen J. Gowdy (SGowdy@lbl.gov) 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Initial work by: 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (c) 1999 Michael Gee (michael@linuxspecific.com) 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This driver is based on the 'USB Mass Storage Class' document. This 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * describes in detail the protocol used to communicate with such 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * devices. Clearly, the designers had SCSI and ATAPI commands in 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * mind when they created this document. The commands are all very 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * similar to commands in the SCSI-II and ATAPI specifications. 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * It is important to note that in a number of cases this class 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * exhibits class-specific exemptions from the USB specification. 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Notably the usage of NAK, STALL and ACK differs from the norm, in 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * that they are used to communicate wait, failed and OK on commands. 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Also, for certain devices, the interrupt endpoint is used to convey 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * status of a command. 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Please see http://www.one-eyed-alien.net/~mdharm/linux-usb for more 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * information about this driver. 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is free software; you can redistribute it and/or modify it 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * under the terms of the GNU General Public License as published by the 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Free Software Foundation; either version 2, or (at your option) any 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * later version. 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is distributed in the hope that it will be useful, but 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * WITHOUT ANY WARRANTY; without even the implied warranty of 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * General Public License for more details. 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * You should have received a copy of the GNU General Public License along 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * with this program; if not, write to the Free Software Foundation, Inc., 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 675 Mass Ave, Cambridge, MA 02139, USA. 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 474186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven#include <linux/mutex.h> 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <scsi/scsi.h> 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <scsi/scsi_cmnd.h> 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <scsi/scsi_devinfo.h> 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <scsi/scsi_device.h> 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <scsi/scsi_eh.h> 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "usb.h" 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "scsiglue.h" 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "debug.h" 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "transport.h" 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "protocol.h" 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 61a81a81a25d3ecdab777abca87c5ddf484056103dAlan Stern/* Vendor IDs for companies that seem to include the READ CAPACITY bug 62a81a81a25d3ecdab777abca87c5ddf484056103dAlan Stern * in all their devices 63a81a81a25d3ecdab777abca87c5ddf484056103dAlan Stern */ 64a81a81a25d3ecdab777abca87c5ddf484056103dAlan Stern#define VENDOR_ID_NOKIA 0x0421 65a81a81a25d3ecdab777abca87c5ddf484056103dAlan Stern#define VENDOR_ID_NIKON 0x04b0 66506e9469833c66ed6bb9acd902e208f7301b6adbAlan Stern#define VENDOR_ID_PENTAX 0x0a17 67a81a81a25d3ecdab777abca87c5ddf484056103dAlan Stern#define VENDOR_ID_MOTOROLA 0x22b8 68a81a81a25d3ecdab777abca87c5ddf484056103dAlan Stern 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*********************************************************************** 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Host functions 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ***********************************************************************/ 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const char* host_info(struct Scsi_Host *host) 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 7500fa43ef09c6bb357d58c14a99181cce09c315c6Matthew Wilcox struct us_data *us = host_to_us(host); 7600fa43ef09c6bb357d58c14a99181cce09c315c6Matthew Wilcox return us->scsi_name; 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int slave_alloc (struct scsi_device *sdev) 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Set the INQUIRY transfer length to 36. We don't use any of 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the extra data and many devices choke if asked for more or 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * less than 36 bytes. 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sdev->inquiry_len = 36; 873a3416b12f1fbd607bc137a57c924a628aa5485cAlan Stern 88f756cbd458ab71c996a069cb3928fb1e2d7cd9ccAlan Stern /* USB has unusual DMA-alignment requirements: Although the 89f756cbd458ab71c996a069cb3928fb1e2d7cd9ccAlan Stern * starting address of each scatter-gather element doesn't matter, 90f756cbd458ab71c996a069cb3928fb1e2d7cd9ccAlan Stern * the length of each element except the last must be divisible 91f756cbd458ab71c996a069cb3928fb1e2d7cd9ccAlan Stern * by the Bulk maxpacket value. There's currently no way to 92f756cbd458ab71c996a069cb3928fb1e2d7cd9ccAlan Stern * express this by block-layer constraints, so we'll cop out 93f756cbd458ab71c996a069cb3928fb1e2d7cd9ccAlan Stern * and simply require addresses to be aligned at 512-byte 94f756cbd458ab71c996a069cb3928fb1e2d7cd9ccAlan Stern * boundaries. This is okay since most block I/O involves 95f756cbd458ab71c996a069cb3928fb1e2d7cd9ccAlan Stern * hardware sectors that are multiples of 512 bytes in length, 96f756cbd458ab71c996a069cb3928fb1e2d7cd9ccAlan Stern * and since host controllers up through USB 2.0 have maxpacket 97f756cbd458ab71c996a069cb3928fb1e2d7cd9ccAlan Stern * values no larger than 512. 98f756cbd458ab71c996a069cb3928fb1e2d7cd9ccAlan Stern * 99f756cbd458ab71c996a069cb3928fb1e2d7cd9ccAlan Stern * But it doesn't suffice for Wireless USB, where Bulk maxpacket 100f756cbd458ab71c996a069cb3928fb1e2d7cd9ccAlan Stern * values can be as large as 2048. To make that work properly 101f756cbd458ab71c996a069cb3928fb1e2d7cd9ccAlan Stern * will require changes to the block layer. 102148d9fe4c91a6356dae1b05b76b8133586c26be4Alan Stern */ 103f756cbd458ab71c996a069cb3928fb1e2d7cd9ccAlan Stern blk_queue_update_dma_alignment(sdev->request_queue, (512 - 1)); 104465ff3185e0cb76d46137335a4d21d0d9d3ac8a2James Bottomley 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int slave_configure(struct scsi_device *sdev) 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct us_data *us = host_to_us(sdev->host); 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 11225985edcedea6396277003854657b5f3cb31a628Lucas De Marchi /* Many devices have trouble transferring more than 32KB at a time, 113883d989a7edf7a62e38e9150990b56209420e9e5Phil Dibowitz * while others have trouble with more than 64K. At this time we 114883d989a7edf7a62e38e9150990b56209420e9e5Phil Dibowitz * are limiting both to 32K (64 sectores). 115883d989a7edf7a62e38e9150990b56209420e9e5Phil Dibowitz */ 1167e4d6c387994294ac8198b624ee71e75de60dfd2Alan Stern if (us->fflags & (US_FL_MAX_SECTORS_64 | US_FL_MAX_SECTORS_MIN)) { 11733abc04f0420dceed0ebc2d1094019d3bb2b5c29Doug Maxey unsigned int max_sectors = 64; 11833abc04f0420dceed0ebc2d1094019d3bb2b5c29Doug Maxey 1197e4d6c387994294ac8198b624ee71e75de60dfd2Alan Stern if (us->fflags & US_FL_MAX_SECTORS_MIN) 12033abc04f0420dceed0ebc2d1094019d3bb2b5c29Doug Maxey max_sectors = PAGE_CACHE_SIZE >> 9; 12149d6271b85a3e18062eaf4d6f8d899abe00a7725Alan Stern if (queue_max_hw_sectors(sdev->request_queue) > max_sectors) 122086fa5ff0854c676ec333760f4c0154b3b242616Martin K. Petersen blk_queue_max_hw_sectors(sdev->request_queue, 12333abc04f0420dceed0ebc2d1094019d3bb2b5c29Doug Maxey max_sectors); 1245c16034d73da2c1b663aa25dedadbc533b3d811cAlan Stern } else if (sdev->type == TYPE_TAPE) { 1255c16034d73da2c1b663aa25dedadbc533b3d811cAlan Stern /* Tapes need much higher max_sector limits, so just 1265c16034d73da2c1b663aa25dedadbc533b3d811cAlan Stern * raise it to the maximum possible (4 GB / 512) and 1275c16034d73da2c1b663aa25dedadbc533b3d811cAlan Stern * let the queue segment size sort out the real limit. 1285c16034d73da2c1b663aa25dedadbc533b3d811cAlan Stern */ 129086fa5ff0854c676ec333760f4c0154b3b242616Martin K. Petersen blk_queue_max_hw_sectors(sdev->request_queue, 0x7FFFFF); 13033abc04f0420dceed0ebc2d1094019d3bb2b5c29Doug Maxey } 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 13296983d2d861bf94b7f70bc47ac3c5b289f519a2dAlan Stern /* Some USB host controllers can't do DMA; they have to use PIO. 13396983d2d861bf94b7f70bc47ac3c5b289f519a2dAlan Stern * They indicate this by setting their dma_mask to NULL. For 13496983d2d861bf94b7f70bc47ac3c5b289f519a2dAlan Stern * such controllers we need to make sure the block layer sets 13596983d2d861bf94b7f70bc47ac3c5b289f519a2dAlan Stern * up bounce buffers in addressable memory. 13696983d2d861bf94b7f70bc47ac3c5b289f519a2dAlan Stern */ 13796983d2d861bf94b7f70bc47ac3c5b289f519a2dAlan Stern if (!us->pusb_dev->bus->controller->dma_mask) 13896983d2d861bf94b7f70bc47ac3c5b289f519a2dAlan Stern blk_queue_bounce_limit(sdev->request_queue, BLK_BOUNCE_HIGH); 13996983d2d861bf94b7f70bc47ac3c5b289f519a2dAlan Stern 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We can't put these settings in slave_alloc() because that gets 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * called before the device type is known. Consequently these 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * settings can't be overridden via the scsi devinfo mechanism. */ 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (sdev->type == TYPE_DISK) { 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 145a81a81a25d3ecdab777abca87c5ddf484056103dAlan Stern /* Some vendors seem to put the READ CAPACITY bug into 146a81a81a25d3ecdab777abca87c5ddf484056103dAlan Stern * all their devices -- primarily makers of cell phones 147a81a81a25d3ecdab777abca87c5ddf484056103dAlan Stern * and digital cameras. Since these devices always use 148a81a81a25d3ecdab777abca87c5ddf484056103dAlan Stern * flash media and can be expected to have an even number 149a81a81a25d3ecdab777abca87c5ddf484056103dAlan Stern * of sectors, we will always enable the CAPACITY_HEURISTICS 150a81a81a25d3ecdab777abca87c5ddf484056103dAlan Stern * flag unless told otherwise. */ 151a81a81a25d3ecdab777abca87c5ddf484056103dAlan Stern switch (le16_to_cpu(us->pusb_dev->descriptor.idVendor)) { 152a81a81a25d3ecdab777abca87c5ddf484056103dAlan Stern case VENDOR_ID_NOKIA: 153a81a81a25d3ecdab777abca87c5ddf484056103dAlan Stern case VENDOR_ID_NIKON: 154506e9469833c66ed6bb9acd902e208f7301b6adbAlan Stern case VENDOR_ID_PENTAX: 155a81a81a25d3ecdab777abca87c5ddf484056103dAlan Stern case VENDOR_ID_MOTOROLA: 156a81a81a25d3ecdab777abca87c5ddf484056103dAlan Stern if (!(us->fflags & (US_FL_FIX_CAPACITY | 157a81a81a25d3ecdab777abca87c5ddf484056103dAlan Stern US_FL_CAPACITY_OK))) 158a81a81a25d3ecdab777abca87c5ddf484056103dAlan Stern us->fflags |= US_FL_CAPACITY_HEURISTICS; 159a81a81a25d3ecdab777abca87c5ddf484056103dAlan Stern break; 160a81a81a25d3ecdab777abca87c5ddf484056103dAlan Stern } 161a81a81a25d3ecdab777abca87c5ddf484056103dAlan Stern 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Disk-type devices use MODE SENSE(6) if the protocol 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (SubClass) is Transparent SCSI, otherwise they use 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * MODE SENSE(10). */ 1658fa7fd74ef398370383df276ca41082ba35aafd8Michal Nazarewicz if (us->subclass != USB_SC_SCSI && us->subclass != USB_SC_CYP_ATACB) 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sdev->use_10_for_ms = 1; 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Many disks only accept MODE SENSE transfer lengths of 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 192 bytes (that's what Windows uses). */ 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sdev->use_192_bytes_for_3f = 1; 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Some devices don't like MODE SENSE with page=0x3f, 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * which is the command used for checking if a device 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * is write-protected. Now that we tell the sd driver 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * to do a 192-byte transfer with this command the 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * majority of devices work fine, but a few still can't 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * handle it. The sd driver will simply assume those 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * devices are write-enabled. */ 1797e4d6c387994294ac8198b624ee71e75de60dfd2Alan Stern if (us->fflags & US_FL_NO_WP_DETECT) 1801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sdev->skip_ms_page_3f = 1; 1811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* A number of devices have problems with MODE SENSE for 1831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * page x08, so we will skip it. */ 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sdev->skip_ms_page_8 = 1; 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 18609b6b51b0b6c1b9bb61815baf205e4d74c89ff04Alan Stern /* Some devices don't handle VPD pages correctly */ 18709b6b51b0b6c1b9bb61815baf205e4d74c89ff04Alan Stern sdev->skip_vpd_pages = 1; 18809b6b51b0b6c1b9bb61815baf205e4d74c89ff04Alan Stern 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Some disks return the total number of blocks in response 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * to READ CAPACITY rather than the highest block number. 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If this device makes that mistake, tell the sd driver. */ 1927e4d6c387994294ac8198b624ee71e75de60dfd2Alan Stern if (us->fflags & US_FL_FIX_CAPACITY) 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sdev->fix_capacity = 1; 19486dbde9cbdfe8bc2c2dfe5d33027d3acc55e0470Matthew Dharm 19561bf54b71d5abf767ee46284be19965d7253ddbfOliver Neukum /* A few disks have two indistinguishable version, one of 19661bf54b71d5abf767ee46284be19965d7253ddbfOliver Neukum * which reports the correct capacity and the other does not. 19761bf54b71d5abf767ee46284be19965d7253ddbfOliver Neukum * The sd driver has to guess which is the case. */ 1987e4d6c387994294ac8198b624ee71e75de60dfd2Alan Stern if (us->fflags & US_FL_CAPACITY_HEURISTICS) 19961bf54b71d5abf767ee46284be19965d7253ddbfOliver Neukum sdev->guess_capacity = 1; 20061bf54b71d5abf767ee46284be19965d7253ddbfOliver Neukum 20100914025cc4e783d4703b4db1d47b41f389e50c8Hans de Goede /* Some devices cannot handle READ_CAPACITY_16 */ 20200914025cc4e783d4703b4db1d47b41f389e50c8Hans de Goede if (us->fflags & US_FL_NO_READ_CAPACITY_16) 20300914025cc4e783d4703b4db1d47b41f389e50c8Hans de Goede sdev->no_read_capacity_16 = 1; 20400914025cc4e783d4703b4db1d47b41f389e50c8Hans de Goede 205b18504e4a631e31edd939fe569342274927d4b41Alan Stern /* 206b18504e4a631e31edd939fe569342274927d4b41Alan Stern * Many devices do not respond properly to READ_CAPACITY_16. 207b18504e4a631e31edd939fe569342274927d4b41Alan Stern * Tell the SCSI layer to try READ_CAPACITY_10 first. 208b18504e4a631e31edd939fe569342274927d4b41Alan Stern */ 209b18504e4a631e31edd939fe569342274927d4b41Alan Stern sdev->try_rc_10_first = 1; 210b18504e4a631e31edd939fe569342274927d4b41Alan Stern 2111537e0ad944acf3a4c2b311a646d7993b89499f7Ben Efros /* assume SPC3 or latter devices support sense size > 18 */ 2121537e0ad944acf3a4c2b311a646d7993b89499f7Ben Efros if (sdev->scsi_level > SCSI_SPC_2) 2131537e0ad944acf3a4c2b311a646d7993b89499f7Ben Efros us->fflags |= US_FL_SANE_SENSE; 2141537e0ad944acf3a4c2b311a646d7993b89499f7Ben Efros 21586dbde9cbdfe8bc2c2dfe5d33027d3acc55e0470Matthew Dharm /* USB-IDE bridges tend to report SK = 0x04 (Non-recoverable 21686dbde9cbdfe8bc2c2dfe5d33027d3acc55e0470Matthew Dharm * Hardware Error) when any low-level error occurs, 21786dbde9cbdfe8bc2c2dfe5d33027d3acc55e0470Matthew Dharm * recoverable or not. Setting this flag tells the SCSI 21886dbde9cbdfe8bc2c2dfe5d33027d3acc55e0470Matthew Dharm * midlayer to retry such commands, which frequently will 21986dbde9cbdfe8bc2c2dfe5d33027d3acc55e0470Matthew Dharm * succeed and fix the error. The worst this can lead to 22086dbde9cbdfe8bc2c2dfe5d33027d3acc55e0470Matthew Dharm * is an occasional series of retries that will all fail. */ 22186dbde9cbdfe8bc2c2dfe5d33027d3acc55e0470Matthew Dharm sdev->retry_hwerror = 1; 22286dbde9cbdfe8bc2c2dfe5d33027d3acc55e0470Matthew Dharm 223f09e495df27d80ae77005ddb2e93df18ec24d04aMauro Carvalho Chehab /* USB disks should allow restart. Some drives spin down 224f09e495df27d80ae77005ddb2e93df18ec24d04aMauro Carvalho Chehab * automatically, requiring a START-STOP UNIT command. */ 225f09e495df27d80ae77005ddb2e93df18ec24d04aMauro Carvalho Chehab sdev->allow_restart = 1; 226f09e495df27d80ae77005ddb2e93df18ec24d04aMauro Carvalho Chehab 22723c3e290fb9ce38cabc2822b47583fc8702411bfHans de Goede /* Some USB cardreaders have trouble reading an sdcard's last 22823c3e290fb9ce38cabc2822b47583fc8702411bfHans de Goede * sector in a larger then 1 sector read, since the performance 22923c3e290fb9ce38cabc2822b47583fc8702411bfHans de Goede * impact is negible we set this flag for all USB disks */ 23023c3e290fb9ce38cabc2822b47583fc8702411bfHans de Goede sdev->last_sector_bug = 1; 23125ff1c316f6a763f1eefe7f8984b2d8c03888432Alan Stern 23225ff1c316f6a763f1eefe7f8984b2d8c03888432Alan Stern /* Enable last-sector hacks for single-target devices using 23325ff1c316f6a763f1eefe7f8984b2d8c03888432Alan Stern * the Bulk-only transport, unless we already know the 23425ff1c316f6a763f1eefe7f8984b2d8c03888432Alan Stern * capacity will be decremented or is correct. */ 23525ff1c316f6a763f1eefe7f8984b2d8c03888432Alan Stern if (!(us->fflags & (US_FL_FIX_CAPACITY | US_FL_CAPACITY_OK | 23625ff1c316f6a763f1eefe7f8984b2d8c03888432Alan Stern US_FL_SCM_MULT_TARG)) && 2378fa7fd74ef398370383df276ca41082ba35aafd8Michal Nazarewicz us->protocol == USB_PR_BULK) 23825ff1c316f6a763f1eefe7f8984b2d8c03888432Alan Stern us->use_last_sector_hacks = 1; 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Non-disk-type devices don't need to blacklist any pages 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * or to force 192-byte transfer lengths for MODE SENSE. 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * But they do need to use MODE SENSE(10). */ 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sdev->use_10_for_ms = 1; 245ae38c78a03e1b77ad45248fcf097e4568e740209Hans de Goede 246ae38c78a03e1b77ad45248fcf097e4568e740209Hans de Goede /* Some (fake) usb cdrom devices don't like READ_DISC_INFO */ 247ae38c78a03e1b77ad45248fcf097e4568e740209Hans de Goede if (us->fflags & US_FL_NO_READ_DISC_INFO) 248ae38c78a03e1b77ad45248fcf097e4568e740209Hans de Goede sdev->no_read_disc_info = 1; 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 251f3f4906516a084bbd9aa3da7592e6b029fe78f5bAlan Stern /* The CB and CBI transports have no way to pass LUN values 252f3f4906516a084bbd9aa3da7592e6b029fe78f5bAlan Stern * other than the bits in the second byte of a CDB. But those 253f3f4906516a084bbd9aa3da7592e6b029fe78f5bAlan Stern * bits don't get set to the LUN value if the device reports 254f3f4906516a084bbd9aa3da7592e6b029fe78f5bAlan Stern * scsi_level == 0 (UNKNOWN). Hence such devices must necessarily 255f3f4906516a084bbd9aa3da7592e6b029fe78f5bAlan Stern * be single-LUN. 256f3f4906516a084bbd9aa3da7592e6b029fe78f5bAlan Stern */ 2578fa7fd74ef398370383df276ca41082ba35aafd8Michal Nazarewicz if ((us->protocol == USB_PR_CB || us->protocol == USB_PR_CBI) && 258f3f4906516a084bbd9aa3da7592e6b029fe78f5bAlan Stern sdev->scsi_level == SCSI_UNKNOWN) 259f3f4906516a084bbd9aa3da7592e6b029fe78f5bAlan Stern us->max_lun = 0; 260f3f4906516a084bbd9aa3da7592e6b029fe78f5bAlan Stern 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Some devices choke when they receive a PREVENT-ALLOW MEDIUM 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * REMOVAL command, so suppress those commands. */ 2637e4d6c387994294ac8198b624ee71e75de60dfd2Alan Stern if (us->fflags & US_FL_NOT_LOCKABLE) 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sdev->lockable = 0; 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* this is to satisfy the compiler, tho I don't think the 2671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * return code is ever checked anywhere. */ 2681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 2691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 27109b6b51b0b6c1b9bb61815baf205e4d74c89ff04Alan Sternstatic int target_alloc(struct scsi_target *starget) 27209b6b51b0b6c1b9bb61815baf205e4d74c89ff04Alan Stern{ 273af74d2dae8f85a0e90a30594beb507f5d954fa3fAlan Stern struct us_data *us = host_to_us(dev_to_shost(starget->dev.parent)); 274af74d2dae8f85a0e90a30594beb507f5d954fa3fAlan Stern 27509b6b51b0b6c1b9bb61815baf205e4d74c89ff04Alan Stern /* 27609b6b51b0b6c1b9bb61815baf205e4d74c89ff04Alan Stern * Some USB drives don't support REPORT LUNS, even though they 27709b6b51b0b6c1b9bb61815baf205e4d74c89ff04Alan Stern * report a SCSI revision level above 2. Tell the SCSI layer 27809b6b51b0b6c1b9bb61815baf205e4d74c89ff04Alan Stern * not to issue that command; it will perform a normal sequential 27909b6b51b0b6c1b9bb61815baf205e4d74c89ff04Alan Stern * scan instead. 28009b6b51b0b6c1b9bb61815baf205e4d74c89ff04Alan Stern */ 28109b6b51b0b6c1b9bb61815baf205e4d74c89ff04Alan Stern starget->no_report_luns = 1; 282af74d2dae8f85a0e90a30594beb507f5d954fa3fAlan Stern 283af74d2dae8f85a0e90a30594beb507f5d954fa3fAlan Stern /* 284af74d2dae8f85a0e90a30594beb507f5d954fa3fAlan Stern * The UFI spec treats the Peripheral Qualifier bits in an 285af74d2dae8f85a0e90a30594beb507f5d954fa3fAlan Stern * INQUIRY result as reserved and requires devices to set them 286af74d2dae8f85a0e90a30594beb507f5d954fa3fAlan Stern * to 0. However the SCSI spec requires these bits to be set 287af74d2dae8f85a0e90a30594beb507f5d954fa3fAlan Stern * to 3 to indicate when a LUN is not present. 288af74d2dae8f85a0e90a30594beb507f5d954fa3fAlan Stern * 289af74d2dae8f85a0e90a30594beb507f5d954fa3fAlan Stern * Let the scanning code know if this target merely sets 290af74d2dae8f85a0e90a30594beb507f5d954fa3fAlan Stern * Peripheral Device Type to 0x1f to indicate no LUN. 291af74d2dae8f85a0e90a30594beb507f5d954fa3fAlan Stern */ 292af74d2dae8f85a0e90a30594beb507f5d954fa3fAlan Stern if (us->subclass == USB_SC_UFI) 293af74d2dae8f85a0e90a30594beb507f5d954fa3fAlan Stern starget->pdt_1f_for_no_lun = 1; 294af74d2dae8f85a0e90a30594beb507f5d954fa3fAlan Stern 29509b6b51b0b6c1b9bb61815baf205e4d74c89ff04Alan Stern return 0; 29609b6b51b0b6c1b9bb61815baf205e4d74c89ff04Alan Stern} 29709b6b51b0b6c1b9bb61815baf205e4d74c89ff04Alan Stern 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* queue a command */ 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* This is always called with scsi_lock(host) held */ 300f281233d3eba15fb225d21ae2e228fd4553d824aJeff Garzikstatic int queuecommand_lck(struct scsi_cmnd *srb, 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds void (*done)(struct scsi_cmnd *)) 3021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct us_data *us = host_to_us(srb->device->host); 3041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 305441b62c1edb986827154768d89bbac0ba779984fHarvey Harrison US_DEBUGP("%s called\n", __func__); 3061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* check for state-transition errors */ 3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (us->srb != NULL) { 3091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR USB_STORAGE "Error in %s: us->srb = %p\n", 310441b62c1edb986827154768d89bbac0ba779984fHarvey Harrison __func__, us->srb); 3111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return SCSI_MLQUEUE_HOST_BUSY; 3121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* fail the command if we are disconnecting */ 3157e4d6c387994294ac8198b624ee71e75de60dfd2Alan Stern if (test_bit(US_FLIDX_DISCONNECTING, &us->dflags)) { 3161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds US_DEBUGP("Fail command during disconnect\n"); 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds srb->result = DID_NO_CONNECT << 16; 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds done(srb); 3191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* enqueue the command and wake up the control thread */ 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds srb->scsi_done = done; 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds us->srb = srb; 3257119e3c37fbf7c27adb5929f344c826ecb8c7859Alan Stern complete(&us->cmnd_ready); 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 330f281233d3eba15fb225d21ae2e228fd4553d824aJeff Garzikstatic DEF_SCSI_QCMD(queuecommand) 331f281233d3eba15fb225d21ae2e228fd4553d824aJeff Garzik 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*********************************************************************** 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Error handling functions 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ***********************************************************************/ 3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Command timeout and abort */ 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int command_abort(struct scsi_cmnd *srb) 3381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct us_data *us = host_to_us(srb->device->host); 3401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 341441b62c1edb986827154768d89bbac0ba779984fHarvey Harrison US_DEBUGP("%s called\n", __func__); 3421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 343226173edae1c49c68ebb723771a02302c85e3475Matthew Dharm /* us->srb together with the TIMED_OUT, RESETTING, and ABORTING 344226173edae1c49c68ebb723771a02302c85e3475Matthew Dharm * bits are protected by the host lock. */ 345226173edae1c49c68ebb723771a02302c85e3475Matthew Dharm scsi_lock(us_to_host(us)); 346226173edae1c49c68ebb723771a02302c85e3475Matthew Dharm 3471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Is this command still active? */ 3481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (us->srb != srb) { 349226173edae1c49c68ebb723771a02302c85e3475Matthew Dharm scsi_unlock(us_to_host(us)); 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds US_DEBUGP ("-- nothing to abort\n"); 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return FAILED; 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set the TIMED_OUT bit. Also set the ABORTING bit, but only if 3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * a device reset isn't already in progress (to avoid interfering 356226173edae1c49c68ebb723771a02302c85e3475Matthew Dharm * with the reset). Note that we must retain the host lock while 357226173edae1c49c68ebb723771a02302c85e3475Matthew Dharm * calling usb_stor_stop_transport(); otherwise it might interfere 358226173edae1c49c68ebb723771a02302c85e3475Matthew Dharm * with an auto-reset that begins as soon as we release the lock. */ 3597e4d6c387994294ac8198b624ee71e75de60dfd2Alan Stern set_bit(US_FLIDX_TIMED_OUT, &us->dflags); 3607e4d6c387994294ac8198b624ee71e75de60dfd2Alan Stern if (!test_bit(US_FLIDX_RESETTING, &us->dflags)) { 3617e4d6c387994294ac8198b624ee71e75de60dfd2Alan Stern set_bit(US_FLIDX_ABORTING, &us->dflags); 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_stor_stop_transport(us); 3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 364226173edae1c49c68ebb723771a02302c85e3475Matthew Dharm scsi_unlock(us_to_host(us)); 3651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Wait for the aborted command to finish */ 3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wait_for_completion(&us->notify); 3681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return SUCCESS; 3691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* This invokes the transport reset mechanism to reset the state of the 3721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * device */ 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int device_reset(struct scsi_cmnd *srb) 3741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct us_data *us = host_to_us(srb->device->host); 3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int result; 3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 378441b62c1edb986827154768d89bbac0ba779984fHarvey Harrison US_DEBUGP("%s called\n", __func__); 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 380d526875deb42e0f4c0d31cb50b4e5bfaf19c3138Greg Kroah-Hartman /* lock the device pointers and do the reset */ 381d526875deb42e0f4c0d31cb50b4e5bfaf19c3138Greg Kroah-Hartman mutex_lock(&(us->dev_mutex)); 382d526875deb42e0f4c0d31cb50b4e5bfaf19c3138Greg Kroah-Hartman result = us->transport_reset(us); 383d526875deb42e0f4c0d31cb50b4e5bfaf19c3138Greg Kroah-Hartman mutex_unlock(&us->dev_mutex); 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3854d07ef762fc8d6d35ecc1511a3b953a733a61a5fMatthew Dharm return result < 0 ? FAILED : SUCCESS; 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3884d07ef762fc8d6d35ecc1511a3b953a733a61a5fMatthew Dharm/* Simulate a SCSI bus reset by resetting the device's USB port. */ 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int bus_reset(struct scsi_cmnd *srb) 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct us_data *us = host_to_us(srb->device->host); 3924d07ef762fc8d6d35ecc1511a3b953a733a61a5fMatthew Dharm int result; 3931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 394441b62c1edb986827154768d89bbac0ba779984fHarvey Harrison US_DEBUGP("%s called\n", __func__); 3954d07ef762fc8d6d35ecc1511a3b953a733a61a5fMatthew Dharm result = usb_stor_port_reset(us); 3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return result < 0 ? FAILED : SUCCESS; 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Report a driver-initiated device reset to the SCSI layer. 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Calling this for a SCSI-initiated reset is unnecessary but harmless. 4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The caller must own the SCSI host lock. */ 4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_stor_report_device_reset(struct us_data *us) 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct Scsi_Host *host = us_to_host(us); 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds scsi_report_device_reset(host, 0, 0); 4087e4d6c387994294ac8198b624ee71e75de60dfd2Alan Stern if (us->fflags & US_FL_SCM_MULT_TARG) { 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 1; i < host->max_id; ++i) 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds scsi_report_device_reset(host, 0, i); 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4144d07ef762fc8d6d35ecc1511a3b953a733a61a5fMatthew Dharm/* Report a driver-initiated bus reset to the SCSI layer. 4154d07ef762fc8d6d35ecc1511a3b953a733a61a5fMatthew Dharm * Calling this for a SCSI-initiated reset is unnecessary but harmless. 416f07600cf9eb3ee92777b2001e564faa413144a99Alan Stern * The caller must not own the SCSI host lock. */ 4174d07ef762fc8d6d35ecc1511a3b953a733a61a5fMatthew Dharmvoid usb_stor_report_bus_reset(struct us_data *us) 4184d07ef762fc8d6d35ecc1511a3b953a733a61a5fMatthew Dharm{ 419f07600cf9eb3ee92777b2001e564faa413144a99Alan Stern struct Scsi_Host *host = us_to_host(us); 420f07600cf9eb3ee92777b2001e564faa413144a99Alan Stern 421f07600cf9eb3ee92777b2001e564faa413144a99Alan Stern scsi_lock(host); 422f07600cf9eb3ee92777b2001e564faa413144a99Alan Stern scsi_report_bus_reset(host, 0); 423f07600cf9eb3ee92777b2001e564faa413144a99Alan Stern scsi_unlock(host); 4244d07ef762fc8d6d35ecc1511a3b953a733a61a5fMatthew Dharm} 4254d07ef762fc8d6d35ecc1511a3b953a733a61a5fMatthew Dharm 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*********************************************************************** 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * /proc/scsi/ functions 4281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ***********************************************************************/ 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* we use this macro to help us write into the buffer */ 4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#undef SPRINTF 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SPRINTF(args...) \ 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds do { if (pos < buffer+length) pos += sprintf(pos, ## args); } while (0) 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int proc_info (struct Scsi_Host *host, char *buffer, 4361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char **start, off_t offset, int length, int inout) 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct us_data *us = host_to_us(host); 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *pos = buffer; 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const char *string; 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* if someone is sending us data, just throw it away */ 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (inout) 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return length; 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* print the controller name */ 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SPRINTF(" Host scsi%d: usb-storage\n", host->host_no); 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* print product, vendor, and serial number strings */ 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (us->pusb_dev->manufacturer) 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds string = us->pusb_dev->manufacturer; 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (us->unusual_dev->vendorName) 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds string = us->unusual_dev->vendorName; 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds string = "Unknown"; 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SPRINTF(" Vendor: %s\n", string); 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (us->pusb_dev->product) 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds string = us->pusb_dev->product; 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (us->unusual_dev->productName) 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds string = us->unusual_dev->productName; 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds string = "Unknown"; 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SPRINTF(" Product: %s\n", string); 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (us->pusb_dev->serial) 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds string = us->pusb_dev->serial; 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds string = "None"; 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SPRINTF("Serial Number: %s\n", string); 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* show the protocol and transport */ 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SPRINTF(" Protocol: %s\n", us->protocol_name); 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SPRINTF(" Transport: %s\n", us->transport_name); 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* show the device flags */ 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (pos < buffer + length) { 4761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pos += sprintf(pos, " Quirks:"); 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define US_FLAG(name, value) \ 4797e4d6c387994294ac8198b624ee71e75de60dfd2Alan Stern if (us->fflags & value) pos += sprintf(pos, " " #name); 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsUS_DO_ALL_FLAGS 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#undef US_FLAG 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *(pos++) = '\n'; 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Calculate start of next buffer, and return value. 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *start = buffer + offset; 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((pos - buffer) < offset) 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (0); 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if ((pos - buffer - offset) < length) 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (pos - buffer - offset); 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (length); 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*********************************************************************** 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Sysfs interface 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ***********************************************************************/ 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Output routine for the sysfs max_sectors file */ 504060b8845e6bea938d65ad6f89e83507e5ff4fec4Yani Ioannoustatic ssize_t show_max_sectors(struct device *dev, struct device_attribute *attr, char *buf) 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct scsi_device *sdev = to_scsi_device(dev); 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 50849d6271b85a3e18062eaf4d6f8d899abe00a7725Alan Stern return sprintf(buf, "%u\n", queue_max_hw_sectors(sdev->request_queue)); 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Input routine for the sysfs max_sectors file */ 512060b8845e6bea938d65ad6f89e83507e5ff4fec4Yani Ioannoustatic ssize_t store_max_sectors(struct device *dev, struct device_attribute *attr, const char *buf, 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size_t count) 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 5151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct scsi_device *sdev = to_scsi_device(dev); 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned short ms; 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 51849d6271b85a3e18062eaf4d6f8d899abe00a7725Alan Stern if (sscanf(buf, "%hu", &ms) > 0) { 519086fa5ff0854c676ec333760f4c0154b3b242616Martin K. Petersen blk_queue_max_hw_sectors(sdev->request_queue, ms); 52049d6271b85a3e18062eaf4d6f8d899abe00a7725Alan Stern return count; 5211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 5221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 5231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 5241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic DEVICE_ATTR(max_sectors, S_IRUGO | S_IWUSR, show_max_sectors, 5261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds store_max_sectors); 5271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct device_attribute *sysfs_device_attr_list[] = { 5291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &dev_attr_max_sectors, 5301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds NULL, 5311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds }; 5321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 5341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * this defines our host template, with which we'll allocate hosts 5351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 5361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct scsi_host_template usb_stor_host_template = { 5381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* basic userland interface stuff */ 5391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .name = "usb-storage", 5401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .proc_name = "usb-storage", 5411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .proc_info = proc_info, 5421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .info = host_info, 5431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* command interface -- queued only */ 5451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .queuecommand = queuecommand, 5461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* error and abort handlers */ 5481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .eh_abort_handler = command_abort, 5491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .eh_device_reset_handler = device_reset, 5501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .eh_bus_reset_handler = bus_reset, 5511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* queue commands only, only one command per LUN */ 5531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .can_queue = 1, 5541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .cmd_per_lun = 1, 5551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* unknown initiator id */ 5571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .this_id = -1, 5581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .slave_alloc = slave_alloc, 5601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .slave_configure = slave_configure, 56109b6b51b0b6c1b9bb61815baf205e4d74c89ff04Alan Stern .target_alloc = target_alloc, 5621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* lots of sg segments can be handled */ 56449d6271b85a3e18062eaf4d6f8d899abe00a7725Alan Stern .sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS, 5651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* limit the total size of a transfer to 120 KB */ 5671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .max_sectors = 240, 5681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* merge commands... this seems to help performance, but 5701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * periodically someone should test to see which setting is more 5711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * optimal. 5721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 5731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .use_clustering = 1, 5741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* emulated HBA */ 5761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .emulated = 1, 5771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* we do our own delay after a device or bus reset */ 5791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .skip_settle_delay = 1, 5801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* sysfs device attributes */ 5821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .sdev_attrs = sysfs_device_attr_list, 5831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* module management */ 5851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .module = THIS_MODULE 5861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 5871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* To Report "Illegal Request: Invalid Field in CDB */ 5891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsunsigned char usb_stor_sense_invalidCDB[18] = { 5901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds [0] = 0x70, /* current error */ 5911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds [2] = ILLEGAL_REQUEST, /* Illegal Request = 0x05 */ 5921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds [7] = 0x0a, /* additional length */ 5931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds [12] = 0x24 /* Invalid Field in CDB */ 5941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 595e6e244b6cb1f70e7109381626293cd40a8334ed3Alan SternEXPORT_SYMBOL_GPL(usb_stor_sense_invalidCDB); 596