scsiglue.c revision 148d9fe4c91a6356dae1b05b76b8133586c26be4
11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Driver for USB Mass Storage compliant devices 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * SCSI layer glue code 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * $Id: scsiglue.c,v 1.26 2002/04/22 03:39:43 mdharm Exp $ 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Current development and maintenance by: 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (c) 1999-2002 Matthew Dharm (mdharm-usb@one-eyed-alien.net) 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Developed with the assistance of: 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (c) 2000 David L. Brown, Jr. (usb-storage@davidb.org) 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (c) 2000 Stephen J. Gowdy (SGowdy@lbl.gov) 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Initial work by: 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (c) 1999 Michael Gee (michael@linuxspecific.com) 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This driver is based on the 'USB Mass Storage Class' document. This 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * describes in detail the protocol used to communicate with such 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * devices. Clearly, the designers had SCSI and ATAPI commands in 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * mind when they created this document. The commands are all very 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * similar to commands in the SCSI-II and ATAPI specifications. 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * It is important to note that in a number of cases this class 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * exhibits class-specific exemptions from the USB specification. 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Notably the usage of NAK, STALL and ACK differs from the norm, in 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * that they are used to communicate wait, failed and OK on commands. 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Also, for certain devices, the interrupt endpoint is used to convey 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * status of a command. 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Please see http://www.one-eyed-alien.net/~mdharm/linux-usb for more 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * information about this driver. 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is free software; you can redistribute it and/or modify it 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * under the terms of the GNU General Public License as published by the 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Free Software Foundation; either version 2, or (at your option) any 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * later version. 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is distributed in the hope that it will be useful, but 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * WITHOUT ANY WARRANTY; without even the implied warranty of 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * General Public License for more details. 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * You should have received a copy of the GNU General Public License along 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * with this program; if not, write to the Free Software Foundation, Inc., 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 675 Mass Ave, Cambridge, MA 02139, USA. 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/slab.h> 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 504186ecf8ad16dd05759a09594de6a87e48759ba6Arjan van de Ven#include <linux/mutex.h> 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <scsi/scsi.h> 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <scsi/scsi_cmnd.h> 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <scsi/scsi_devinfo.h> 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <scsi/scsi_device.h> 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <scsi/scsi_eh.h> 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "usb.h" 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "scsiglue.h" 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "debug.h" 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "transport.h" 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "protocol.h" 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*********************************************************************** 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Host functions 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ***********************************************************************/ 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const char* host_info(struct Scsi_Host *host) 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return "SCSI emulation for USB Mass Storage devices"; 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int slave_alloc (struct scsi_device *sdev) 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 753a3416b12f1fbd607bc137a57c924a628aa5485cAlan Stern struct us_data *us = host_to_us(sdev->host); 76148d9fe4c91a6356dae1b05b76b8133586c26be4Alan Stern struct usb_host_endpoint *bulk_in_ep; 773a3416b12f1fbd607bc137a57c924a628aa5485cAlan Stern 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Set the INQUIRY transfer length to 36. We don't use any of 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the extra data and many devices choke if asked for more or 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * less than 36 bytes. 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sdev->inquiry_len = 36; 843a3416b12f1fbd607bc137a57c924a628aa5485cAlan Stern 85465ff3185e0cb76d46137335a4d21d0d9d3ac8a2James Bottomley /* Scatter-gather buffers (all but the last) must have a length 86465ff3185e0cb76d46137335a4d21d0d9d3ac8a2James Bottomley * divisible by the bulk maxpacket size. Otherwise a data packet 87465ff3185e0cb76d46137335a4d21d0d9d3ac8a2James Bottomley * would end up being short, causing a premature end to the data 88148d9fe4c91a6356dae1b05b76b8133586c26be4Alan Stern * transfer. We'll use the maxpacket value of the bulk-IN pipe 89148d9fe4c91a6356dae1b05b76b8133586c26be4Alan Stern * to set the SCSI device queue's DMA alignment mask. 90148d9fe4c91a6356dae1b05b76b8133586c26be4Alan Stern */ 91148d9fe4c91a6356dae1b05b76b8133586c26be4Alan Stern bulk_in_ep = us->pusb_dev->ep_in[usb_pipeendpoint(us->recv_bulk_pipe)]; 92148d9fe4c91a6356dae1b05b76b8133586c26be4Alan Stern blk_queue_update_dma_alignment(sdev->request_queue, 93148d9fe4c91a6356dae1b05b76b8133586c26be4Alan Stern le16_to_cpu(bulk_in_ep->desc.wMaxPacketSize) - 1); 94148d9fe4c91a6356dae1b05b76b8133586c26be4Alan Stern /* wMaxPacketSize must be a power of 2 */ 95465ff3185e0cb76d46137335a4d21d0d9d3ac8a2James Bottomley 963a3416b12f1fbd607bc137a57c924a628aa5485cAlan Stern /* 973a3416b12f1fbd607bc137a57c924a628aa5485cAlan Stern * The UFI spec treates the Peripheral Qualifier bits in an 983a3416b12f1fbd607bc137a57c924a628aa5485cAlan Stern * INQUIRY result as reserved and requires devices to set them 993a3416b12f1fbd607bc137a57c924a628aa5485cAlan Stern * to 0. However the SCSI spec requires these bits to be set 1003a3416b12f1fbd607bc137a57c924a628aa5485cAlan Stern * to 3 to indicate when a LUN is not present. 1013a3416b12f1fbd607bc137a57c924a628aa5485cAlan Stern * 1023a3416b12f1fbd607bc137a57c924a628aa5485cAlan Stern * Let the scanning code know if this target merely sets 1033a3416b12f1fbd607bc137a57c924a628aa5485cAlan Stern * Peripheral Device Type to 0x1f to indicate no LUN. 1043a3416b12f1fbd607bc137a57c924a628aa5485cAlan Stern */ 1053a3416b12f1fbd607bc137a57c924a628aa5485cAlan Stern if (us->subclass == US_SC_UFI) 1063a3416b12f1fbd607bc137a57c924a628aa5485cAlan Stern sdev->sdev_target->pdt_1f_for_no_lun = 1; 1073a3416b12f1fbd607bc137a57c924a628aa5485cAlan Stern 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int slave_configure(struct scsi_device *sdev) 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct us_data *us = host_to_us(sdev->host); 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 115883d989a7edf7a62e38e9150990b56209420e9e5Phil Dibowitz /* Many devices have trouble transfering more than 32KB at a time, 116883d989a7edf7a62e38e9150990b56209420e9e5Phil Dibowitz * while others have trouble with more than 64K. At this time we 117883d989a7edf7a62e38e9150990b56209420e9e5Phil Dibowitz * are limiting both to 32K (64 sectores). 118883d989a7edf7a62e38e9150990b56209420e9e5Phil Dibowitz */ 11933abc04f0420dceed0ebc2d1094019d3bb2b5c29Doug Maxey if (us->flags & (US_FL_MAX_SECTORS_64 | US_FL_MAX_SECTORS_MIN)) { 12033abc04f0420dceed0ebc2d1094019d3bb2b5c29Doug Maxey unsigned int max_sectors = 64; 12133abc04f0420dceed0ebc2d1094019d3bb2b5c29Doug Maxey 12233abc04f0420dceed0ebc2d1094019d3bb2b5c29Doug Maxey if (us->flags & US_FL_MAX_SECTORS_MIN) 12333abc04f0420dceed0ebc2d1094019d3bb2b5c29Doug Maxey max_sectors = PAGE_CACHE_SIZE >> 9; 12433abc04f0420dceed0ebc2d1094019d3bb2b5c29Doug Maxey if (sdev->request_queue->max_sectors > max_sectors) 12533abc04f0420dceed0ebc2d1094019d3bb2b5c29Doug Maxey blk_queue_max_sectors(sdev->request_queue, 12633abc04f0420dceed0ebc2d1094019d3bb2b5c29Doug Maxey max_sectors); 12733abc04f0420dceed0ebc2d1094019d3bb2b5c29Doug Maxey } 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* We can't put these settings in slave_alloc() because that gets 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * called before the device type is known. Consequently these 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * settings can't be overridden via the scsi devinfo mechanism. */ 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (sdev->type == TYPE_DISK) { 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Disk-type devices use MODE SENSE(6) if the protocol 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * (SubClass) is Transparent SCSI, otherwise they use 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * MODE SENSE(10). */ 137d277064e7e16d02e0078a6bc1820764ae00dea87Matthieu CASTET if (us->subclass != US_SC_SCSI && us->subclass != US_SC_CYP_ATACB) 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sdev->use_10_for_ms = 1; 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Many disks only accept MODE SENSE transfer lengths of 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 192 bytes (that's what Windows uses). */ 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sdev->use_192_bytes_for_3f = 1; 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Some devices don't like MODE SENSE with page=0x3f, 1451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * which is the command used for checking if a device 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * is write-protected. Now that we tell the sd driver 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * to do a 192-byte transfer with this command the 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * majority of devices work fine, but a few still can't 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * handle it. The sd driver will simply assume those 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * devices are write-enabled. */ 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (us->flags & US_FL_NO_WP_DETECT) 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sdev->skip_ms_page_3f = 1; 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* A number of devices have problems with MODE SENSE for 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * page x08, so we will skip it. */ 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sdev->skip_ms_page_8 = 1; 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Some disks return the total number of blocks in response 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * to READ CAPACITY rather than the highest block number. 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * If this device makes that mistake, tell the sd driver. */ 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (us->flags & US_FL_FIX_CAPACITY) 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sdev->fix_capacity = 1; 16386dbde9cbdfe8bc2c2dfe5d33027d3acc55e0470Matthew Dharm 16461bf54b71d5abf767ee46284be19965d7253ddbfOliver Neukum /* A few disks have two indistinguishable version, one of 16561bf54b71d5abf767ee46284be19965d7253ddbfOliver Neukum * which reports the correct capacity and the other does not. 16661bf54b71d5abf767ee46284be19965d7253ddbfOliver Neukum * The sd driver has to guess which is the case. */ 16761bf54b71d5abf767ee46284be19965d7253ddbfOliver Neukum if (us->flags & US_FL_CAPACITY_HEURISTICS) 16861bf54b71d5abf767ee46284be19965d7253ddbfOliver Neukum sdev->guess_capacity = 1; 16961bf54b71d5abf767ee46284be19965d7253ddbfOliver Neukum 170a4e628328ec60873fec9d506d682155391f589ceMatthew Dharm /* Some devices report a SCSI revision level above 2 but are 171a4e628328ec60873fec9d506d682155391f589ceMatthew Dharm * unable to handle the REPORT LUNS command (for which 172a4e628328ec60873fec9d506d682155391f589ceMatthew Dharm * support is mandatory at level 3). Since we already have 173a4e628328ec60873fec9d506d682155391f589ceMatthew Dharm * a Get-Max-LUN request, we won't lose much by setting the 174a4e628328ec60873fec9d506d682155391f589ceMatthew Dharm * revision level down to 2. The only devices that would be 175a4e628328ec60873fec9d506d682155391f589ceMatthew Dharm * affected are those with sparse LUNs. */ 176f3f4906516a084bbd9aa3da7592e6b029fe78f5bAlan Stern if (sdev->scsi_level > SCSI_2) 177f3f4906516a084bbd9aa3da7592e6b029fe78f5bAlan Stern sdev->sdev_target->scsi_level = 178f3f4906516a084bbd9aa3da7592e6b029fe78f5bAlan Stern sdev->scsi_level = SCSI_2; 179a4e628328ec60873fec9d506d682155391f589ceMatthew Dharm 18086dbde9cbdfe8bc2c2dfe5d33027d3acc55e0470Matthew Dharm /* USB-IDE bridges tend to report SK = 0x04 (Non-recoverable 18186dbde9cbdfe8bc2c2dfe5d33027d3acc55e0470Matthew Dharm * Hardware Error) when any low-level error occurs, 18286dbde9cbdfe8bc2c2dfe5d33027d3acc55e0470Matthew Dharm * recoverable or not. Setting this flag tells the SCSI 18386dbde9cbdfe8bc2c2dfe5d33027d3acc55e0470Matthew Dharm * midlayer to retry such commands, which frequently will 18486dbde9cbdfe8bc2c2dfe5d33027d3acc55e0470Matthew Dharm * succeed and fix the error. The worst this can lead to 18586dbde9cbdfe8bc2c2dfe5d33027d3acc55e0470Matthew Dharm * is an occasional series of retries that will all fail. */ 18686dbde9cbdfe8bc2c2dfe5d33027d3acc55e0470Matthew Dharm sdev->retry_hwerror = 1; 18786dbde9cbdfe8bc2c2dfe5d33027d3acc55e0470Matthew Dharm 188f09e495df27d80ae77005ddb2e93df18ec24d04aMauro Carvalho Chehab /* USB disks should allow restart. Some drives spin down 189f09e495df27d80ae77005ddb2e93df18ec24d04aMauro Carvalho Chehab * automatically, requiring a START-STOP UNIT command. */ 190f09e495df27d80ae77005ddb2e93df18ec24d04aMauro Carvalho Chehab sdev->allow_restart = 1; 191f09e495df27d80ae77005ddb2e93df18ec24d04aMauro Carvalho Chehab 19223c3e290fb9ce38cabc2822b47583fc8702411bfHans de Goede /* Some USB cardreaders have trouble reading an sdcard's last 19323c3e290fb9ce38cabc2822b47583fc8702411bfHans de Goede * sector in a larger then 1 sector read, since the performance 19423c3e290fb9ce38cabc2822b47583fc8702411bfHans de Goede * impact is negible we set this flag for all USB disks */ 19523c3e290fb9ce38cabc2822b47583fc8702411bfHans de Goede sdev->last_sector_bug = 1; 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } else { 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Non-disk-type devices don't need to blacklist any pages 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * or to force 192-byte transfer lengths for MODE SENSE. 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * But they do need to use MODE SENSE(10). */ 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sdev->use_10_for_ms = 1; 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 204f3f4906516a084bbd9aa3da7592e6b029fe78f5bAlan Stern /* The CB and CBI transports have no way to pass LUN values 205f3f4906516a084bbd9aa3da7592e6b029fe78f5bAlan Stern * other than the bits in the second byte of a CDB. But those 206f3f4906516a084bbd9aa3da7592e6b029fe78f5bAlan Stern * bits don't get set to the LUN value if the device reports 207f3f4906516a084bbd9aa3da7592e6b029fe78f5bAlan Stern * scsi_level == 0 (UNKNOWN). Hence such devices must necessarily 208f3f4906516a084bbd9aa3da7592e6b029fe78f5bAlan Stern * be single-LUN. 209f3f4906516a084bbd9aa3da7592e6b029fe78f5bAlan Stern */ 210f3f4906516a084bbd9aa3da7592e6b029fe78f5bAlan Stern if ((us->protocol == US_PR_CB || us->protocol == US_PR_CBI) && 211f3f4906516a084bbd9aa3da7592e6b029fe78f5bAlan Stern sdev->scsi_level == SCSI_UNKNOWN) 212f3f4906516a084bbd9aa3da7592e6b029fe78f5bAlan Stern us->max_lun = 0; 213f3f4906516a084bbd9aa3da7592e6b029fe78f5bAlan Stern 2141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Some devices choke when they receive a PREVENT-ALLOW MEDIUM 2151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * REMOVAL command, so suppress those commands. */ 2161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (us->flags & US_FL_NOT_LOCKABLE) 2171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds sdev->lockable = 0; 2181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* this is to satisfy the compiler, tho I don't think the 2201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * return code is ever checked anywhere. */ 2211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 2221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* queue a command */ 2251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* This is always called with scsi_lock(host) held */ 2261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int queuecommand(struct scsi_cmnd *srb, 2271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds void (*done)(struct scsi_cmnd *)) 2281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct us_data *us = host_to_us(srb->device->host); 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds US_DEBUGP("%s called\n", __FUNCTION__); 2321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* check for state-transition errors */ 2341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (us->srb != NULL) { 2351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds printk(KERN_ERR USB_STORAGE "Error in %s: us->srb = %p\n", 2361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __FUNCTION__, us->srb); 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return SCSI_MLQUEUE_HOST_BUSY; 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* fail the command if we are disconnecting */ 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (test_bit(US_FLIDX_DISCONNECTING, &us->flags)) { 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds US_DEBUGP("Fail command during disconnect\n"); 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds srb->result = DID_NO_CONNECT << 16; 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds done(srb); 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 2461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* enqueue the command and wake up the control thread */ 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds srb->scsi_done = done; 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds us->srb = srb; 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds up(&(us->sema)); 2521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*********************************************************************** 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Error handling functions 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ***********************************************************************/ 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Command timeout and abort */ 2611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int command_abort(struct scsi_cmnd *srb) 2621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct us_data *us = host_to_us(srb->device->host); 2641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds US_DEBUGP("%s called\n", __FUNCTION__); 2661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 267226173edae1c49c68ebb723771a02302c85e3475Matthew Dharm /* us->srb together with the TIMED_OUT, RESETTING, and ABORTING 268226173edae1c49c68ebb723771a02302c85e3475Matthew Dharm * bits are protected by the host lock. */ 269226173edae1c49c68ebb723771a02302c85e3475Matthew Dharm scsi_lock(us_to_host(us)); 270226173edae1c49c68ebb723771a02302c85e3475Matthew Dharm 2711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Is this command still active? */ 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (us->srb != srb) { 273226173edae1c49c68ebb723771a02302c85e3475Matthew Dharm scsi_unlock(us_to_host(us)); 2741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds US_DEBUGP ("-- nothing to abort\n"); 2751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return FAILED; 2761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 2771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Set the TIMED_OUT bit. Also set the ABORTING bit, but only if 2791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * a device reset isn't already in progress (to avoid interfering 280226173edae1c49c68ebb723771a02302c85e3475Matthew Dharm * with the reset). Note that we must retain the host lock while 281226173edae1c49c68ebb723771a02302c85e3475Matthew Dharm * calling usb_stor_stop_transport(); otherwise it might interfere 282226173edae1c49c68ebb723771a02302c85e3475Matthew Dharm * with an auto-reset that begins as soon as we release the lock. */ 2831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_bit(US_FLIDX_TIMED_OUT, &us->flags); 2841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!test_bit(US_FLIDX_RESETTING, &us->flags)) { 2851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_bit(US_FLIDX_ABORTING, &us->flags); 2861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds usb_stor_stop_transport(us); 2871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 288226173edae1c49c68ebb723771a02302c85e3475Matthew Dharm scsi_unlock(us_to_host(us)); 2891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* Wait for the aborted command to finish */ 2911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds wait_for_completion(&us->notify); 2921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return SUCCESS; 2931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* This invokes the transport reset mechanism to reset the state of the 2961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * device */ 2971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int device_reset(struct scsi_cmnd *srb) 2981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct us_data *us = host_to_us(srb->device->host); 3001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int result; 3011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds US_DEBUGP("%s called\n", __FUNCTION__); 3031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 304d526875deb42e0f4c0d31cb50b4e5bfaf19c3138Greg Kroah-Hartman /* lock the device pointers and do the reset */ 305d526875deb42e0f4c0d31cb50b4e5bfaf19c3138Greg Kroah-Hartman mutex_lock(&(us->dev_mutex)); 306d526875deb42e0f4c0d31cb50b4e5bfaf19c3138Greg Kroah-Hartman result = us->transport_reset(us); 307d526875deb42e0f4c0d31cb50b4e5bfaf19c3138Greg Kroah-Hartman mutex_unlock(&us->dev_mutex); 3081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3094d07ef762fc8d6d35ecc1511a3b953a733a61a5fMatthew Dharm return result < 0 ? FAILED : SUCCESS; 3101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3124d07ef762fc8d6d35ecc1511a3b953a733a61a5fMatthew Dharm/* Simulate a SCSI bus reset by resetting the device's USB port. */ 3131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int bus_reset(struct scsi_cmnd *srb) 3141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct us_data *us = host_to_us(srb->device->host); 3164d07ef762fc8d6d35ecc1511a3b953a733a61a5fMatthew Dharm int result; 3171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds US_DEBUGP("%s called\n", __FUNCTION__); 3194d07ef762fc8d6d35ecc1511a3b953a733a61a5fMatthew Dharm result = usb_stor_port_reset(us); 3201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return result < 0 ? FAILED : SUCCESS; 3211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Report a driver-initiated device reset to the SCSI layer. 3241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Calling this for a SCSI-initiated reset is unnecessary but harmless. 3251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The caller must own the SCSI host lock. */ 3261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid usb_stor_report_device_reset(struct us_data *us) 3271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int i; 3291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct Scsi_Host *host = us_to_host(us); 3301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds scsi_report_device_reset(host, 0, 0); 3321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (us->flags & US_FL_SCM_MULT_TARG) { 3331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (i = 1; i < host->max_id; ++i) 3341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds scsi_report_device_reset(host, 0, i); 3351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 3361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 3371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3384d07ef762fc8d6d35ecc1511a3b953a733a61a5fMatthew Dharm/* Report a driver-initiated bus reset to the SCSI layer. 3394d07ef762fc8d6d35ecc1511a3b953a733a61a5fMatthew Dharm * Calling this for a SCSI-initiated reset is unnecessary but harmless. 340f07600cf9eb3ee92777b2001e564faa413144a99Alan Stern * The caller must not own the SCSI host lock. */ 3414d07ef762fc8d6d35ecc1511a3b953a733a61a5fMatthew Dharmvoid usb_stor_report_bus_reset(struct us_data *us) 3424d07ef762fc8d6d35ecc1511a3b953a733a61a5fMatthew Dharm{ 343f07600cf9eb3ee92777b2001e564faa413144a99Alan Stern struct Scsi_Host *host = us_to_host(us); 344f07600cf9eb3ee92777b2001e564faa413144a99Alan Stern 345f07600cf9eb3ee92777b2001e564faa413144a99Alan Stern scsi_lock(host); 346f07600cf9eb3ee92777b2001e564faa413144a99Alan Stern scsi_report_bus_reset(host, 0); 347f07600cf9eb3ee92777b2001e564faa413144a99Alan Stern scsi_unlock(host); 3484d07ef762fc8d6d35ecc1511a3b953a733a61a5fMatthew Dharm} 3494d07ef762fc8d6d35ecc1511a3b953a733a61a5fMatthew Dharm 3501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*********************************************************************** 3511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * /proc/scsi/ functions 3521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ***********************************************************************/ 3531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* we use this macro to help us write into the buffer */ 3551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#undef SPRINTF 3561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define SPRINTF(args...) \ 3571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds do { if (pos < buffer+length) pos += sprintf(pos, ## args); } while (0) 3581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int proc_info (struct Scsi_Host *host, char *buffer, 3601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char **start, off_t offset, int length, int inout) 3611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 3621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct us_data *us = host_to_us(host); 3631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char *pos = buffer; 3641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const char *string; 3651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* if someone is sending us data, just throw it away */ 3671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (inout) 3681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return length; 3691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* print the controller name */ 3711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SPRINTF(" Host scsi%d: usb-storage\n", host->host_no); 3721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* print product, vendor, and serial number strings */ 3741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (us->pusb_dev->manufacturer) 3751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds string = us->pusb_dev->manufacturer; 3761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (us->unusual_dev->vendorName) 3771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds string = us->unusual_dev->vendorName; 3781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 3791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds string = "Unknown"; 3801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SPRINTF(" Vendor: %s\n", string); 3811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (us->pusb_dev->product) 3821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds string = us->pusb_dev->product; 3831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if (us->unusual_dev->productName) 3841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds string = us->unusual_dev->productName; 3851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 3861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds string = "Unknown"; 3871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SPRINTF(" Product: %s\n", string); 3881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (us->pusb_dev->serial) 3891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds string = us->pusb_dev->serial; 3901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 3911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds string = "None"; 3921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SPRINTF("Serial Number: %s\n", string); 3931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* show the protocol and transport */ 3951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SPRINTF(" Protocol: %s\n", us->protocol_name); 3961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds SPRINTF(" Transport: %s\n", us->transport_name); 3971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 3981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* show the device flags */ 3991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (pos < buffer + length) { 4001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pos += sprintf(pos, " Quirks:"); 4011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define US_FLAG(name, value) \ 4031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (us->flags & value) pos += sprintf(pos, " " #name); 4041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsUS_DO_ALL_FLAGS 4051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#undef US_FLAG 4061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *(pos++) = '\n'; 4081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 4111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Calculate start of next buffer, and return value. 4121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *start = buffer + offset; 4141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if ((pos - buffer) < offset) 4161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (0); 4171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else if ((pos - buffer - offset) < length) 4181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (pos - buffer - offset); 4191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else 4201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (length); 4211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/*********************************************************************** 4241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Sysfs interface 4251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds ***********************************************************************/ 4261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Output routine for the sysfs max_sectors file */ 428060b8845e6bea938d65ad6f89e83507e5ff4fec4Yani Ioannoustatic ssize_t show_max_sectors(struct device *dev, struct device_attribute *attr, char *buf) 4291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct scsi_device *sdev = to_scsi_device(dev); 4311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return sprintf(buf, "%u\n", sdev->request_queue->max_sectors); 4331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Input routine for the sysfs max_sectors file */ 436060b8845e6bea938d65ad6f89e83507e5ff4fec4Yani Ioannoustatic ssize_t store_max_sectors(struct device *dev, struct device_attribute *attr, const char *buf, 4371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds size_t count) 4381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 4391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct scsi_device *sdev = to_scsi_device(dev); 4401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned short ms; 4411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (sscanf(buf, "%hu", &ms) > 0 && ms <= SCSI_DEFAULT_MAX_SECTORS) { 4431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds blk_queue_max_sectors(sdev->request_queue, ms); 4441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return strlen(buf); 4451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 4461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EINVAL; 4471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 4481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic DEVICE_ATTR(max_sectors, S_IRUGO | S_IWUSR, show_max_sectors, 4501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds store_max_sectors); 4511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct device_attribute *sysfs_device_attr_list[] = { 4531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds &dev_attr_max_sectors, 4541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds NULL, 4551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds }; 4561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 4581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * this defines our host template, with which we'll allocate hosts 4591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct scsi_host_template usb_stor_host_template = { 4621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* basic userland interface stuff */ 4631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .name = "usb-storage", 4641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .proc_name = "usb-storage", 4651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .proc_info = proc_info, 4661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .info = host_info, 4671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* command interface -- queued only */ 4691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .queuecommand = queuecommand, 4701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* error and abort handlers */ 4721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .eh_abort_handler = command_abort, 4731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .eh_device_reset_handler = device_reset, 4741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .eh_bus_reset_handler = bus_reset, 4751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* queue commands only, only one command per LUN */ 4771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .can_queue = 1, 4781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .cmd_per_lun = 1, 4791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* unknown initiator id */ 4811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .this_id = -1, 4821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .slave_alloc = slave_alloc, 4841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .slave_configure = slave_configure, 4851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* lots of sg segments can be handled */ 4871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .sg_tablesize = SG_ALL, 4881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* limit the total size of a transfer to 120 KB */ 4901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .max_sectors = 240, 4911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* merge commands... this seems to help performance, but 4931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * periodically someone should test to see which setting is more 4941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * optimal. 4951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 4961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .use_clustering = 1, 4971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 4981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* emulated HBA */ 4991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .emulated = 1, 5001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* we do our own delay after a device or bus reset */ 5021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .skip_settle_delay = 1, 5031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* sysfs device attributes */ 5051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .sdev_attrs = sysfs_device_attr_list, 5061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* module management */ 5081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .module = THIS_MODULE 5091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 5101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 5111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* To Report "Illegal Request: Invalid Field in CDB */ 5121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsunsigned char usb_stor_sense_invalidCDB[18] = { 5131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds [0] = 0x70, /* current error */ 5141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds [2] = ILLEGAL_REQUEST, /* Illegal Request = 0x05 */ 5151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds [7] = 0x0a, /* additional length */ 5161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds [12] = 0x24 /* Invalid Field in CDB */ 5171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 5181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 519