Greg Kroah-Hartman | 5fd54ac | 2017-11-03 11:28:30 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 2 | /* |
| 3 | * USB Attached SCSI |
| 4 | * Note that this is not the same as the USB Mass Storage driver |
| 5 | * |
Hans de Goede | 1363074 | 2016-04-12 12:27:09 +0200 | [diff] [blame] | 6 | * Copyright Hans de Goede <hdegoede@redhat.com> for Red Hat, Inc. 2013 - 2016 |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 7 | * Copyright Matthew Wilcox for Intel Corp, 2010 |
| 8 | * Copyright Sarah Sharp for Intel Corp, 2010 |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 9 | */ |
| 10 | |
| 11 | #include <linux/blkdev.h> |
| 12 | #include <linux/slab.h> |
| 13 | #include <linux/types.h> |
Paul Gortmaker | 6eb0de8 | 2011-07-03 16:09:31 -0400 | [diff] [blame] | 14 | #include <linux/module.h> |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 15 | #include <linux/usb.h> |
Hans de Goede | 79b4c06 | 2013-10-25 17:04:33 +0100 | [diff] [blame] | 16 | #include <linux/usb_usual.h> |
Sebastian Andrzej Siewior | c898add | 2012-01-11 12:42:32 +0100 | [diff] [blame] | 17 | #include <linux/usb/hcd.h> |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 18 | #include <linux/usb/storage.h> |
Sebastian Andrzej Siewior | 348748b | 2012-01-11 12:45:56 +0100 | [diff] [blame] | 19 | #include <linux/usb/uas.h> |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 20 | |
| 21 | #include <scsi/scsi.h> |
Hans de Goede | 4de7a373 | 2013-10-22 16:10:44 +0100 | [diff] [blame] | 22 | #include <scsi/scsi_eh.h> |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 23 | #include <scsi/scsi_dbg.h> |
| 24 | #include <scsi/scsi_cmnd.h> |
| 25 | #include <scsi/scsi_device.h> |
| 26 | #include <scsi/scsi_host.h> |
| 27 | #include <scsi/scsi_tcq.h> |
| 28 | |
Hans de Goede | 82aa038 | 2013-10-21 08:53:31 +0100 | [diff] [blame] | 29 | #include "uas-detect.h" |
Hans de Goede | 5930785 | 2014-09-15 16:04:12 +0200 | [diff] [blame] | 30 | #include "scsiglue.h" |
Hans de Goede | 82aa038 | 2013-10-21 08:53:31 +0100 | [diff] [blame] | 31 | |
Hans de Goede | 5e61aed | 2014-09-13 12:26:32 +0200 | [diff] [blame] | 32 | #define MAX_CMNDS 256 |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 33 | |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 34 | struct uas_dev_info { |
| 35 | struct usb_interface *intf; |
| 36 | struct usb_device *udev; |
Gerd Hoffmann | a0e39e3 | 2012-09-25 10:47:04 +0200 | [diff] [blame] | 37 | struct usb_anchor cmd_urbs; |
Gerd Hoffmann | bdd000f | 2012-06-19 09:54:53 +0200 | [diff] [blame] | 38 | struct usb_anchor sense_urbs; |
| 39 | struct usb_anchor data_urbs; |
Hans de Goede | 5930785 | 2014-09-15 16:04:12 +0200 | [diff] [blame] | 40 | unsigned long flags; |
Gerd Hoffmann | 023b515 | 2012-06-19 09:54:54 +0200 | [diff] [blame] | 41 | int qdepth, resetting; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 42 | unsigned cmd_pipe, status_pipe, data_in_pipe, data_out_pipe; |
| 43 | unsigned use_streams:1; |
Hans de Goede | da65c2b | 2013-11-11 11:51:42 +0100 | [diff] [blame] | 44 | unsigned shutdown:1; |
Hans de Goede | 5e61aed | 2014-09-13 12:26:32 +0200 | [diff] [blame] | 45 | struct scsi_cmnd *cmnd[MAX_CMNDS]; |
Gerd Hoffmann | e064852 | 2012-09-25 10:47:08 +0200 | [diff] [blame] | 46 | spinlock_t lock; |
Gerd Hoffmann | 1bf8198 | 2013-09-13 13:27:12 +0200 | [diff] [blame] | 47 | struct work_struct work; |
EJ Hsu | 3e99862 | 2020-01-30 01:25:06 -0800 | [diff] [blame] | 48 | struct work_struct scan_work; /* for async scanning */ |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 49 | }; |
| 50 | |
| 51 | enum { |
Oliver Neukum | 7643319 | 2015-11-05 16:20:36 +0100 | [diff] [blame] | 52 | SUBMIT_STATUS_URB = BIT(1), |
| 53 | ALLOC_DATA_IN_URB = BIT(2), |
| 54 | SUBMIT_DATA_IN_URB = BIT(3), |
| 55 | ALLOC_DATA_OUT_URB = BIT(4), |
| 56 | SUBMIT_DATA_OUT_URB = BIT(5), |
| 57 | ALLOC_CMD_URB = BIT(6), |
| 58 | SUBMIT_CMD_URB = BIT(7), |
| 59 | COMMAND_INFLIGHT = BIT(8), |
| 60 | DATA_IN_URB_INFLIGHT = BIT(9), |
| 61 | DATA_OUT_URB_INFLIGHT = BIT(10), |
| 62 | COMMAND_ABORTED = BIT(11), |
| 63 | IS_IN_WORK_LIST = BIT(12), |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 64 | }; |
| 65 | |
| 66 | /* Overrides scsi_pointer */ |
| 67 | struct uas_cmd_info { |
| 68 | unsigned int state; |
Hans de Goede | e28e2f2f | 2014-10-12 12:19:40 +0200 | [diff] [blame] | 69 | unsigned int uas_tag; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 70 | struct urb *cmd_urb; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 71 | struct urb *data_in_urb; |
| 72 | struct urb *data_out_urb; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 73 | }; |
| 74 | |
| 75 | /* I hate forward declarations, but I actually have a loop */ |
| 76 | static int uas_submit_urbs(struct scsi_cmnd *cmnd, |
Oliver Neukum | b36d839 | 2015-11-03 16:43:17 +0100 | [diff] [blame] | 77 | struct uas_dev_info *devinfo); |
Sarah Sharp | ea9da1c | 2011-12-02 11:55:44 -0800 | [diff] [blame] | 78 | static void uas_do_work(struct work_struct *work); |
Gerd Hoffmann | 4c45697 | 2012-11-30 11:54:44 +0100 | [diff] [blame] | 79 | static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller); |
Gerd Hoffmann | d89bd83 | 2013-09-13 13:27:11 +0200 | [diff] [blame] | 80 | static void uas_free_streams(struct uas_dev_info *devinfo); |
Hans de Goede | 1ad7ed5 | 2014-09-13 12:26:49 +0200 | [diff] [blame] | 81 | static void uas_log_cmd_state(struct scsi_cmnd *cmnd, const char *prefix, |
| 82 | int status); |
Gerd Hoffmann | aa8f612 | 2012-11-30 11:54:40 +0100 | [diff] [blame] | 83 | |
Oliver Neukum | f6cc609 | 2020-04-15 16:17:50 +0200 | [diff] [blame] | 84 | /* |
| 85 | * This driver needs its own workqueue, as we need to control memory allocation. |
| 86 | * |
| 87 | * In the course of error handling and power management uas_wait_for_pending_cmnds() |
| 88 | * needs to flush pending work items. In these contexts we cannot allocate memory |
| 89 | * by doing block IO as we would deadlock. For the same reason we cannot wait |
| 90 | * for anything allocating memory not heeding these constraints. |
| 91 | * |
| 92 | * So we have to control all work items that can be on the workqueue we flush. |
| 93 | * Hence we cannot share a queue and need our own. |
| 94 | */ |
| 95 | static struct workqueue_struct *workqueue; |
| 96 | |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 97 | static void uas_do_work(struct work_struct *work) |
| 98 | { |
Gerd Hoffmann | 1bf8198 | 2013-09-13 13:27:12 +0200 | [diff] [blame] | 99 | struct uas_dev_info *devinfo = |
| 100 | container_of(work, struct uas_dev_info, work); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 101 | struct uas_cmd_info *cmdinfo; |
Hans de Goede | 43cd99c | 2014-09-13 12:26:38 +0200 | [diff] [blame] | 102 | struct scsi_cmnd *cmnd; |
Gerd Hoffmann | e064852 | 2012-09-25 10:47:08 +0200 | [diff] [blame] | 103 | unsigned long flags; |
Hans de Goede | 43cd99c | 2014-09-13 12:26:38 +0200 | [diff] [blame] | 104 | int i, err; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 105 | |
Gerd Hoffmann | 1bf8198 | 2013-09-13 13:27:12 +0200 | [diff] [blame] | 106 | spin_lock_irqsave(&devinfo->lock, flags); |
Hans de Goede | b7b5d11 | 2014-09-13 12:26:30 +0200 | [diff] [blame] | 107 | |
| 108 | if (devinfo->resetting) |
| 109 | goto out; |
| 110 | |
Hans de Goede | 43cd99c | 2014-09-13 12:26:38 +0200 | [diff] [blame] | 111 | for (i = 0; i < devinfo->qdepth; i++) { |
| 112 | if (!devinfo->cmnd[i]) |
| 113 | continue; |
| 114 | |
| 115 | cmnd = devinfo->cmnd[i]; |
Bart Van Assche | 5dfcf1a | 2022-02-18 11:51:13 -0800 | [diff] [blame] | 116 | cmdinfo = scsi_cmd_priv(cmnd); |
Hans de Goede | 61c09ce | 2013-11-12 13:44:20 +0100 | [diff] [blame] | 117 | |
| 118 | if (!(cmdinfo->state & IS_IN_WORK_LIST)) |
| 119 | continue; |
| 120 | |
Oliver Neukum | b36d839 | 2015-11-03 16:43:17 +0100 | [diff] [blame] | 121 | err = uas_submit_urbs(cmnd, cmnd->device->hostdata); |
Hans de Goede | 61c09ce | 2013-11-12 13:44:20 +0100 | [diff] [blame] | 122 | if (!err) |
Gerd Hoffmann | efefecf | 2012-11-30 11:54:42 +0100 | [diff] [blame] | 123 | cmdinfo->state &= ~IS_IN_WORK_LIST; |
Hans de Goede | 61c09ce | 2013-11-12 13:44:20 +0100 | [diff] [blame] | 124 | else |
Oliver Neukum | f6cc609 | 2020-04-15 16:17:50 +0200 | [diff] [blame] | 125 | queue_work(workqueue, &devinfo->work); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 126 | } |
Hans de Goede | b7b5d11 | 2014-09-13 12:26:30 +0200 | [diff] [blame] | 127 | out: |
Gerd Hoffmann | 4c45697 | 2012-11-30 11:54:44 +0100 | [diff] [blame] | 128 | spin_unlock_irqrestore(&devinfo->lock, flags); |
| 129 | } |
| 130 | |
EJ Hsu | 3e99862 | 2020-01-30 01:25:06 -0800 | [diff] [blame] | 131 | static void uas_scan_work(struct work_struct *work) |
| 132 | { |
| 133 | struct uas_dev_info *devinfo = |
| 134 | container_of(work, struct uas_dev_info, scan_work); |
| 135 | struct Scsi_Host *shost = usb_get_intfdata(devinfo->intf); |
| 136 | |
| 137 | dev_dbg(&devinfo->intf->dev, "starting scan\n"); |
| 138 | scsi_scan_host(shost); |
| 139 | dev_dbg(&devinfo->intf->dev, "scan complete\n"); |
| 140 | } |
| 141 | |
Bart Van Assche | 5dfcf1a | 2022-02-18 11:51:13 -0800 | [diff] [blame] | 142 | static void uas_add_work(struct scsi_cmnd *cmnd) |
Gerd Hoffmann | 1bf8198 | 2013-09-13 13:27:12 +0200 | [diff] [blame] | 143 | { |
Bart Van Assche | 5dfcf1a | 2022-02-18 11:51:13 -0800 | [diff] [blame] | 144 | struct uas_cmd_info *cmdinfo = scsi_cmd_priv(cmnd); |
Gerd Hoffmann | 1bf8198 | 2013-09-13 13:27:12 +0200 | [diff] [blame] | 145 | struct uas_dev_info *devinfo = cmnd->device->hostdata; |
| 146 | |
Sanjeev Sharma | ab945ef | 2014-08-12 12:10:21 +0530 | [diff] [blame] | 147 | lockdep_assert_held(&devinfo->lock); |
Gerd Hoffmann | 1bf8198 | 2013-09-13 13:27:12 +0200 | [diff] [blame] | 148 | cmdinfo->state |= IS_IN_WORK_LIST; |
Oliver Neukum | f6cc609 | 2020-04-15 16:17:50 +0200 | [diff] [blame] | 149 | queue_work(workqueue, &devinfo->work); |
Gerd Hoffmann | 1bf8198 | 2013-09-13 13:27:12 +0200 | [diff] [blame] | 150 | } |
| 151 | |
Hans de Goede | 1589349 | 2014-09-13 12:26:36 +0200 | [diff] [blame] | 152 | static void uas_zap_pending(struct uas_dev_info *devinfo, int result) |
Gerd Hoffmann | 326349f | 2013-09-13 13:27:13 +0200 | [diff] [blame] | 153 | { |
| 154 | struct uas_cmd_info *cmdinfo; |
Hans de Goede | 43cd99c | 2014-09-13 12:26:38 +0200 | [diff] [blame] | 155 | struct scsi_cmnd *cmnd; |
Gerd Hoffmann | 326349f | 2013-09-13 13:27:13 +0200 | [diff] [blame] | 156 | unsigned long flags; |
Hans de Goede | 43cd99c | 2014-09-13 12:26:38 +0200 | [diff] [blame] | 157 | int i, err; |
Gerd Hoffmann | 326349f | 2013-09-13 13:27:13 +0200 | [diff] [blame] | 158 | |
| 159 | spin_lock_irqsave(&devinfo->lock, flags); |
Hans de Goede | 43cd99c | 2014-09-13 12:26:38 +0200 | [diff] [blame] | 160 | for (i = 0; i < devinfo->qdepth; i++) { |
| 161 | if (!devinfo->cmnd[i]) |
| 162 | continue; |
| 163 | |
| 164 | cmnd = devinfo->cmnd[i]; |
Bart Van Assche | 5dfcf1a | 2022-02-18 11:51:13 -0800 | [diff] [blame] | 165 | cmdinfo = scsi_cmd_priv(cmnd); |
Hans de Goede | 1ad7ed5 | 2014-09-13 12:26:49 +0200 | [diff] [blame] | 166 | uas_log_cmd_state(cmnd, __func__, 0); |
Hans de Goede | 9c15c57 | 2014-09-13 12:26:37 +0200 | [diff] [blame] | 167 | /* Sense urbs were killed, clear COMMAND_INFLIGHT manually */ |
| 168 | cmdinfo->state &= ~COMMAND_INFLIGHT; |
Hans de Goede | 1589349 | 2014-09-13 12:26:36 +0200 | [diff] [blame] | 169 | cmnd->result = result << 16; |
Hans de Goede | 9c15c57 | 2014-09-13 12:26:37 +0200 | [diff] [blame] | 170 | err = uas_try_complete(cmnd, __func__); |
| 171 | WARN_ON(err != 0); |
Gerd Hoffmann | 326349f | 2013-09-13 13:27:13 +0200 | [diff] [blame] | 172 | } |
| 173 | spin_unlock_irqrestore(&devinfo->lock, flags); |
| 174 | } |
| 175 | |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 176 | static void uas_sense(struct urb *urb, struct scsi_cmnd *cmnd) |
| 177 | { |
| 178 | struct sense_iu *sense_iu = urb->transfer_buffer; |
| 179 | struct scsi_device *sdev = cmnd->device; |
| 180 | |
| 181 | if (urb->actual_length > 16) { |
| 182 | unsigned len = be16_to_cpup(&sense_iu->len); |
| 183 | if (len + 16 != urb->actual_length) { |
| 184 | int newlen = min(len + 16, urb->actual_length) - 16; |
| 185 | if (newlen < 0) |
| 186 | newlen = 0; |
| 187 | sdev_printk(KERN_INFO, sdev, "%s: urb length %d " |
| 188 | "disagrees with IU sense data length %d, " |
| 189 | "using %d bytes of sense data\n", __func__, |
| 190 | urb->actual_length, len, newlen); |
| 191 | len = newlen; |
| 192 | } |
| 193 | memcpy(cmnd->sense_buffer, sense_iu->sense, len); |
| 194 | } |
| 195 | |
| 196 | cmnd->result = sense_iu->status; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 197 | } |
| 198 | |
Hans de Goede | 1ad7ed5 | 2014-09-13 12:26:49 +0200 | [diff] [blame] | 199 | static void uas_log_cmd_state(struct scsi_cmnd *cmnd, const char *prefix, |
| 200 | int status) |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 201 | { |
Bart Van Assche | 5dfcf1a | 2022-02-18 11:51:13 -0800 | [diff] [blame] | 202 | struct uas_cmd_info *ci = scsi_cmd_priv(cmnd); |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 203 | |
Oliver Neukum | 5963dec | 2020-04-15 16:17:49 +0200 | [diff] [blame] | 204 | if (status == -ENODEV) /* too late */ |
| 205 | return; |
| 206 | |
Hans de Goede | 60d9f67 | 2014-09-13 12:26:34 +0200 | [diff] [blame] | 207 | scmd_printk(KERN_INFO, cmnd, |
Hans de Goede | e28e2f2f | 2014-10-12 12:19:40 +0200 | [diff] [blame] | 208 | "%s %d uas-tag %d inflight:%s%s%s%s%s%s%s%s%s%s%s%s ", |
Bart Van Assche | 5dfcf1a | 2022-02-18 11:51:13 -0800 | [diff] [blame] | 209 | prefix, status, ci->uas_tag, |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 210 | (ci->state & SUBMIT_STATUS_URB) ? " s-st" : "", |
| 211 | (ci->state & ALLOC_DATA_IN_URB) ? " a-in" : "", |
| 212 | (ci->state & SUBMIT_DATA_IN_URB) ? " s-in" : "", |
| 213 | (ci->state & ALLOC_DATA_OUT_URB) ? " a-out" : "", |
| 214 | (ci->state & SUBMIT_DATA_OUT_URB) ? " s-out" : "", |
| 215 | (ci->state & ALLOC_CMD_URB) ? " a-cmd" : "", |
| 216 | (ci->state & SUBMIT_CMD_URB) ? " s-cmd" : "", |
| 217 | (ci->state & COMMAND_INFLIGHT) ? " CMD" : "", |
| 218 | (ci->state & DATA_IN_URB_INFLIGHT) ? " IN" : "", |
| 219 | (ci->state & DATA_OUT_URB_INFLIGHT) ? " OUT" : "", |
Gerd Hoffmann | b06e48a | 2012-11-30 11:54:41 +0100 | [diff] [blame] | 220 | (ci->state & COMMAND_ABORTED) ? " abort" : "", |
Gerd Hoffmann | efefecf | 2012-11-30 11:54:42 +0100 | [diff] [blame] | 221 | (ci->state & IS_IN_WORK_LIST) ? " work" : ""); |
Hans de Goede | 6dcd8ec | 2014-09-13 12:26:45 +0200 | [diff] [blame] | 222 | scsi_print_command(cmnd); |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 223 | } |
| 224 | |
Hans de Goede | 4c5481e | 2014-09-13 12:26:41 +0200 | [diff] [blame] | 225 | static void uas_free_unsubmitted_urbs(struct scsi_cmnd *cmnd) |
| 226 | { |
| 227 | struct uas_cmd_info *cmdinfo; |
| 228 | |
| 229 | if (!cmnd) |
| 230 | return; |
| 231 | |
Bart Van Assche | 5dfcf1a | 2022-02-18 11:51:13 -0800 | [diff] [blame] | 232 | cmdinfo = scsi_cmd_priv(cmnd); |
Hans de Goede | 4c5481e | 2014-09-13 12:26:41 +0200 | [diff] [blame] | 233 | |
| 234 | if (cmdinfo->state & SUBMIT_CMD_URB) |
| 235 | usb_free_urb(cmdinfo->cmd_urb); |
| 236 | |
| 237 | /* data urbs may have never gotten their submit flag set */ |
| 238 | if (!(cmdinfo->state & DATA_IN_URB_INFLIGHT)) |
| 239 | usb_free_urb(cmdinfo->data_in_urb); |
| 240 | if (!(cmdinfo->state & DATA_OUT_URB_INFLIGHT)) |
| 241 | usb_free_urb(cmdinfo->data_out_urb); |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 242 | } |
| 243 | |
| 244 | static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller) |
| 245 | { |
Bart Van Assche | 5dfcf1a | 2022-02-18 11:51:13 -0800 | [diff] [blame] | 246 | struct uas_cmd_info *cmdinfo = scsi_cmd_priv(cmnd); |
Gerd Hoffmann | e064852 | 2012-09-25 10:47:08 +0200 | [diff] [blame] | 247 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 248 | |
Sanjeev Sharma | ab945ef | 2014-08-12 12:10:21 +0530 | [diff] [blame] | 249 | lockdep_assert_held(&devinfo->lock); |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 250 | if (cmdinfo->state & (COMMAND_INFLIGHT | |
| 251 | DATA_IN_URB_INFLIGHT | |
Gerd Hoffmann | b06e48a | 2012-11-30 11:54:41 +0100 | [diff] [blame] | 252 | DATA_OUT_URB_INFLIGHT | |
Hans de Goede | 616f0e6 | 2014-09-13 12:26:40 +0200 | [diff] [blame] | 253 | COMMAND_ABORTED)) |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 254 | return -EBUSY; |
Hans de Goede | e28e2f2f | 2014-10-12 12:19:40 +0200 | [diff] [blame] | 255 | devinfo->cmnd[cmdinfo->uas_tag - 1] = NULL; |
Hans de Goede | 4c5481e | 2014-09-13 12:26:41 +0200 | [diff] [blame] | 256 | uas_free_unsubmitted_urbs(cmnd); |
Bart Van Assche | 46c9794 | 2021-10-07 13:46:10 -0700 | [diff] [blame] | 257 | scsi_done(cmnd); |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 258 | return 0; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 259 | } |
| 260 | |
| 261 | static void uas_xfer_data(struct urb *urb, struct scsi_cmnd *cmnd, |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 262 | unsigned direction) |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 263 | { |
Bart Van Assche | 5dfcf1a | 2022-02-18 11:51:13 -0800 | [diff] [blame] | 264 | struct uas_cmd_info *cmdinfo = scsi_cmd_priv(cmnd); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 265 | int err; |
| 266 | |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 267 | cmdinfo->state |= direction | SUBMIT_STATUS_URB; |
Oliver Neukum | b36d839 | 2015-11-03 16:43:17 +0100 | [diff] [blame] | 268 | err = uas_submit_urbs(cmnd, cmnd->device->hostdata); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 269 | if (err) { |
Bart Van Assche | 5dfcf1a | 2022-02-18 11:51:13 -0800 | [diff] [blame] | 270 | uas_add_work(cmnd); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 271 | } |
| 272 | } |
| 273 | |
Oliver Neukum | aa74268 | 2016-01-19 10:51:09 +0100 | [diff] [blame] | 274 | static bool uas_evaluate_response_iu(struct response_iu *riu, struct scsi_cmnd *cmnd) |
| 275 | { |
| 276 | u8 response_code = riu->response_code; |
| 277 | |
| 278 | switch (response_code) { |
| 279 | case RC_INCORRECT_LUN: |
Oliver Neukum | 8036a7e | 2020-09-16 11:40:26 +0200 | [diff] [blame] | 280 | set_host_byte(cmnd, DID_BAD_TARGET); |
Oliver Neukum | aa74268 | 2016-01-19 10:51:09 +0100 | [diff] [blame] | 281 | break; |
| 282 | case RC_TMF_SUCCEEDED: |
Oliver Neukum | 8036a7e | 2020-09-16 11:40:26 +0200 | [diff] [blame] | 283 | set_host_byte(cmnd, DID_OK); |
Oliver Neukum | aa74268 | 2016-01-19 10:51:09 +0100 | [diff] [blame] | 284 | break; |
| 285 | case RC_TMF_NOT_SUPPORTED: |
Mike Christie | f1d0d5c | 2022-08-11 20:00:20 -0500 | [diff] [blame] | 286 | set_host_byte(cmnd, DID_BAD_TARGET); |
Oliver Neukum | aa74268 | 2016-01-19 10:51:09 +0100 | [diff] [blame] | 287 | break; |
| 288 | default: |
| 289 | uas_log_cmd_state(cmnd, "response iu", response_code); |
Oliver Neukum | 8036a7e | 2020-09-16 11:40:26 +0200 | [diff] [blame] | 290 | set_host_byte(cmnd, DID_ERROR); |
Oliver Neukum | aa74268 | 2016-01-19 10:51:09 +0100 | [diff] [blame] | 291 | break; |
| 292 | } |
| 293 | |
| 294 | return response_code == RC_TMF_SUCCEEDED; |
| 295 | } |
| 296 | |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 297 | static void uas_stat_cmplt(struct urb *urb) |
| 298 | { |
| 299 | struct iu *iu = urb->transfer_buffer; |
Sebastian Andrzej Siewior | 22188f4 | 2011-12-19 20:22:39 +0100 | [diff] [blame] | 300 | struct Scsi_Host *shost = urb->context; |
Hans de Goede | 21fc05b | 2013-11-13 09:32:22 +0100 | [diff] [blame] | 301 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
Hans de Goede | 60d9f67 | 2014-09-13 12:26:34 +0200 | [diff] [blame] | 302 | struct urb *data_in_urb = NULL; |
| 303 | struct urb *data_out_urb = NULL; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 304 | struct scsi_cmnd *cmnd; |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 305 | struct uas_cmd_info *cmdinfo; |
Gerd Hoffmann | e064852 | 2012-09-25 10:47:08 +0200 | [diff] [blame] | 306 | unsigned long flags; |
Hans de Goede | 5e61aed | 2014-09-13 12:26:32 +0200 | [diff] [blame] | 307 | unsigned int idx; |
Oliver Neukum | cca26be | 2015-08-24 11:10:43 +0200 | [diff] [blame] | 308 | int status = urb->status; |
Oliver Neukum | aa74268 | 2016-01-19 10:51:09 +0100 | [diff] [blame] | 309 | bool success; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 310 | |
Hans de Goede | b7b5d11 | 2014-09-13 12:26:30 +0200 | [diff] [blame] | 311 | spin_lock_irqsave(&devinfo->lock, flags); |
| 312 | |
| 313 | if (devinfo->resetting) |
| 314 | goto out; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 315 | |
Oliver Neukum | cca26be | 2015-08-24 11:10:43 +0200 | [diff] [blame] | 316 | if (status) { |
| 317 | if (status != -ENOENT && status != -ECONNRESET && status != -ESHUTDOWN) |
| 318 | dev_err(&urb->dev->dev, "stat urb: status %d\n", status); |
Hans de Goede | b7b5d11 | 2014-09-13 12:26:30 +0200 | [diff] [blame] | 319 | goto out; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 320 | } |
| 321 | |
Hans de Goede | 5e61aed | 2014-09-13 12:26:32 +0200 | [diff] [blame] | 322 | idx = be16_to_cpup(&iu->tag) - 1; |
| 323 | if (idx >= MAX_CMNDS || !devinfo->cmnd[idx]) { |
| 324 | dev_err(&urb->dev->dev, |
Hans de Goede | e28e2f2f | 2014-10-12 12:19:40 +0200 | [diff] [blame] | 325 | "stat urb: no pending cmd for uas-tag %d\n", idx + 1); |
Hans de Goede | b7b5d11 | 2014-09-13 12:26:30 +0200 | [diff] [blame] | 326 | goto out; |
Gerd Hoffmann | 023b515 | 2012-06-19 09:54:54 +0200 | [diff] [blame] | 327 | } |
| 328 | |
Hans de Goede | 5e61aed | 2014-09-13 12:26:32 +0200 | [diff] [blame] | 329 | cmnd = devinfo->cmnd[idx]; |
Bart Van Assche | 5dfcf1a | 2022-02-18 11:51:13 -0800 | [diff] [blame] | 330 | cmdinfo = scsi_cmd_priv(cmnd); |
Hans de Goede | d89da03 | 2014-09-13 12:26:33 +0200 | [diff] [blame] | 331 | |
| 332 | if (!(cmdinfo->state & COMMAND_INFLIGHT)) { |
Hans de Goede | 1ad7ed5 | 2014-09-13 12:26:49 +0200 | [diff] [blame] | 333 | uas_log_cmd_state(cmnd, "unexpected status cmplt", 0); |
Hans de Goede | d89da03 | 2014-09-13 12:26:33 +0200 | [diff] [blame] | 334 | goto out; |
| 335 | } |
| 336 | |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 337 | switch (iu->iu_id) { |
| 338 | case IU_ID_STATUS: |
Hans de Goede | 5ad22cf | 2014-09-13 12:26:47 +0200 | [diff] [blame] | 339 | uas_sense(urb, cmnd); |
Gerd Hoffmann | 8aac863 | 2012-06-19 09:54:52 +0200 | [diff] [blame] | 340 | if (cmnd->result != 0) { |
| 341 | /* cancel data transfers on error */ |
Hans de Goede | 60d9f67 | 2014-09-13 12:26:34 +0200 | [diff] [blame] | 342 | data_in_urb = usb_get_urb(cmdinfo->data_in_urb); |
| 343 | data_out_urb = usb_get_urb(cmdinfo->data_out_urb); |
Gerd Hoffmann | 8aac863 | 2012-06-19 09:54:52 +0200 | [diff] [blame] | 344 | } |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 345 | cmdinfo->state &= ~COMMAND_INFLIGHT; |
| 346 | uas_try_complete(cmnd, __func__); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 347 | break; |
| 348 | case IU_ID_READ_READY: |
Hans de Goede | 8e45315 | 2013-11-15 10:04:11 +0100 | [diff] [blame] | 349 | if (!cmdinfo->data_in_urb || |
| 350 | (cmdinfo->state & DATA_IN_URB_INFLIGHT)) { |
Hans de Goede | 1ad7ed5 | 2014-09-13 12:26:49 +0200 | [diff] [blame] | 351 | uas_log_cmd_state(cmnd, "unexpected read rdy", 0); |
Hans de Goede | 8e45315 | 2013-11-15 10:04:11 +0100 | [diff] [blame] | 352 | break; |
| 353 | } |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 354 | uas_xfer_data(urb, cmnd, SUBMIT_DATA_IN_URB); |
| 355 | break; |
| 356 | case IU_ID_WRITE_READY: |
Hans de Goede | 8e45315 | 2013-11-15 10:04:11 +0100 | [diff] [blame] | 357 | if (!cmdinfo->data_out_urb || |
| 358 | (cmdinfo->state & DATA_OUT_URB_INFLIGHT)) { |
Hans de Goede | 1ad7ed5 | 2014-09-13 12:26:49 +0200 | [diff] [blame] | 359 | uas_log_cmd_state(cmnd, "unexpected write rdy", 0); |
Hans de Goede | 8e45315 | 2013-11-15 10:04:11 +0100 | [diff] [blame] | 360 | break; |
| 361 | } |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 362 | uas_xfer_data(urb, cmnd, SUBMIT_DATA_OUT_URB); |
| 363 | break; |
Hans de Goede | fac1f48 | 2014-09-13 12:26:51 +0200 | [diff] [blame] | 364 | case IU_ID_RESPONSE: |
Hans de Goede | fac1f48 | 2014-09-13 12:26:51 +0200 | [diff] [blame] | 365 | cmdinfo->state &= ~COMMAND_INFLIGHT; |
Oliver Neukum | aa74268 | 2016-01-19 10:51:09 +0100 | [diff] [blame] | 366 | success = uas_evaluate_response_iu((struct response_iu *)iu, cmnd); |
| 367 | if (!success) { |
| 368 | /* Error, cancel data transfers */ |
| 369 | data_in_urb = usb_get_urb(cmdinfo->data_in_urb); |
| 370 | data_out_urb = usb_get_urb(cmdinfo->data_out_urb); |
| 371 | } |
Hans de Goede | fac1f48 | 2014-09-13 12:26:51 +0200 | [diff] [blame] | 372 | uas_try_complete(cmnd, __func__); |
| 373 | break; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 374 | default: |
Hans de Goede | 1ad7ed5 | 2014-09-13 12:26:49 +0200 | [diff] [blame] | 375 | uas_log_cmd_state(cmnd, "bogus IU", iu->iu_id); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 376 | } |
Hans de Goede | b7b5d11 | 2014-09-13 12:26:30 +0200 | [diff] [blame] | 377 | out: |
Gerd Hoffmann | e9bd7e1 | 2012-06-19 09:54:50 +0200 | [diff] [blame] | 378 | usb_free_urb(urb); |
Gerd Hoffmann | e064852 | 2012-09-25 10:47:08 +0200 | [diff] [blame] | 379 | spin_unlock_irqrestore(&devinfo->lock, flags); |
Hans de Goede | 60d9f67 | 2014-09-13 12:26:34 +0200 | [diff] [blame] | 380 | |
| 381 | /* Unlinking of data urbs must be done without holding the lock */ |
| 382 | if (data_in_urb) { |
| 383 | usb_unlink_urb(data_in_urb); |
| 384 | usb_put_urb(data_in_urb); |
| 385 | } |
| 386 | if (data_out_urb) { |
| 387 | usb_unlink_urb(data_out_urb); |
| 388 | usb_put_urb(data_out_urb); |
| 389 | } |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 390 | } |
| 391 | |
Gerd Hoffmann | c621a81 | 2012-06-19 09:54:48 +0200 | [diff] [blame] | 392 | static void uas_data_cmplt(struct urb *urb) |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 393 | { |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 394 | struct scsi_cmnd *cmnd = urb->context; |
Bart Van Assche | 5dfcf1a | 2022-02-18 11:51:13 -0800 | [diff] [blame] | 395 | struct uas_cmd_info *cmdinfo = scsi_cmd_priv(cmnd); |
Gerd Hoffmann | e064852 | 2012-09-25 10:47:08 +0200 | [diff] [blame] | 396 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
Christoph Hellwig | ae3d56d | 2019-01-29 09:33:07 +0100 | [diff] [blame] | 397 | struct scsi_data_buffer *sdb = &cmnd->sdb; |
Gerd Hoffmann | e064852 | 2012-09-25 10:47:08 +0200 | [diff] [blame] | 398 | unsigned long flags; |
Oliver Neukum | cca26be | 2015-08-24 11:10:43 +0200 | [diff] [blame] | 399 | int status = urb->status; |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 400 | |
Gerd Hoffmann | e064852 | 2012-09-25 10:47:08 +0200 | [diff] [blame] | 401 | spin_lock_irqsave(&devinfo->lock, flags); |
Hans de Goede | b7b5d11 | 2014-09-13 12:26:30 +0200 | [diff] [blame] | 402 | |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 403 | if (cmdinfo->data_in_urb == urb) { |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 404 | cmdinfo->state &= ~DATA_IN_URB_INFLIGHT; |
Hans de Goede | 85fea82 | 2014-09-13 12:26:35 +0200 | [diff] [blame] | 405 | cmdinfo->data_in_urb = NULL; |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 406 | } else if (cmdinfo->data_out_urb == urb) { |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 407 | cmdinfo->state &= ~DATA_OUT_URB_INFLIGHT; |
Hans de Goede | 85fea82 | 2014-09-13 12:26:35 +0200 | [diff] [blame] | 408 | cmdinfo->data_out_urb = NULL; |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 409 | } |
Hans de Goede | b7b5d11 | 2014-09-13 12:26:30 +0200 | [diff] [blame] | 410 | |
| 411 | if (devinfo->resetting) |
| 412 | goto out; |
| 413 | |
Hans de Goede | d89da03 | 2014-09-13 12:26:33 +0200 | [diff] [blame] | 414 | /* Data urbs should not complete before the cmd urb is submitted */ |
| 415 | if (cmdinfo->state & SUBMIT_CMD_URB) { |
Hans de Goede | 1ad7ed5 | 2014-09-13 12:26:49 +0200 | [diff] [blame] | 416 | uas_log_cmd_state(cmnd, "unexpected data cmplt", 0); |
Hans de Goede | d89da03 | 2014-09-13 12:26:33 +0200 | [diff] [blame] | 417 | goto out; |
| 418 | } |
| 419 | |
Oliver Neukum | cca26be | 2015-08-24 11:10:43 +0200 | [diff] [blame] | 420 | if (status) { |
| 421 | if (status != -ENOENT && status != -ECONNRESET && status != -ESHUTDOWN) |
| 422 | uas_log_cmd_state(cmnd, "data cmplt err", status); |
Gerd Hoffmann | 8aac863 | 2012-06-19 09:54:52 +0200 | [diff] [blame] | 423 | /* error: no data transfered */ |
Bart Van Assche | 229531b | 2019-02-08 13:25:01 -0800 | [diff] [blame] | 424 | scsi_set_resid(cmnd, sdb->length); |
Gerd Hoffmann | 8aac863 | 2012-06-19 09:54:52 +0200 | [diff] [blame] | 425 | } else { |
Bart Van Assche | 229531b | 2019-02-08 13:25:01 -0800 | [diff] [blame] | 426 | scsi_set_resid(cmnd, sdb->length - urb->actual_length); |
Gerd Hoffmann | 8aac863 | 2012-06-19 09:54:52 +0200 | [diff] [blame] | 427 | } |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 428 | uas_try_complete(cmnd, __func__); |
Hans de Goede | b7b5d11 | 2014-09-13 12:26:30 +0200 | [diff] [blame] | 429 | out: |
Hans de Goede | 85fea82 | 2014-09-13 12:26:35 +0200 | [diff] [blame] | 430 | usb_free_urb(urb); |
Gerd Hoffmann | e064852 | 2012-09-25 10:47:08 +0200 | [diff] [blame] | 431 | spin_unlock_irqrestore(&devinfo->lock, flags); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 432 | } |
| 433 | |
Hans de Goede | 876285c | 2013-11-07 08:52:42 +0100 | [diff] [blame] | 434 | static void uas_cmd_cmplt(struct urb *urb) |
| 435 | { |
Hans de Goede | b6823c5 | 2014-09-13 12:26:39 +0200 | [diff] [blame] | 436 | if (urb->status) |
| 437 | dev_err(&urb->dev->dev, "cmd cmplt err %d\n", urb->status); |
Hans de Goede | 876285c | 2013-11-07 08:52:42 +0100 | [diff] [blame] | 438 | |
Hans de Goede | 876285c | 2013-11-07 08:52:42 +0100 | [diff] [blame] | 439 | usb_free_urb(urb); |
| 440 | } |
| 441 | |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 442 | static struct urb *uas_alloc_data_urb(struct uas_dev_info *devinfo, gfp_t gfp, |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 443 | struct scsi_cmnd *cmnd, |
| 444 | enum dma_data_direction dir) |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 445 | { |
| 446 | struct usb_device *udev = devinfo->udev; |
Bart Van Assche | 5dfcf1a | 2022-02-18 11:51:13 -0800 | [diff] [blame] | 447 | struct uas_cmd_info *cmdinfo = scsi_cmd_priv(cmnd); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 448 | struct urb *urb = usb_alloc_urb(0, gfp); |
Christoph Hellwig | ae3d56d | 2019-01-29 09:33:07 +0100 | [diff] [blame] | 449 | struct scsi_data_buffer *sdb = &cmnd->sdb; |
Hans de Goede | 2d75b9c | 2014-10-03 12:08:56 +0200 | [diff] [blame] | 450 | unsigned int pipe = (dir == DMA_FROM_DEVICE) |
| 451 | ? devinfo->data_in_pipe : devinfo->data_out_pipe; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 452 | |
| 453 | if (!urb) |
| 454 | goto out; |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 455 | usb_fill_bulk_urb(urb, udev, pipe, NULL, sdb->length, |
| 456 | uas_data_cmplt, cmnd); |
Hans de Goede | e28e2f2f | 2014-10-12 12:19:40 +0200 | [diff] [blame] | 457 | if (devinfo->use_streams) |
| 458 | urb->stream_id = cmdinfo->uas_tag; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 459 | urb->num_sgs = udev->bus->sg_tablesize ? sdb->table.nents : 0; |
| 460 | urb->sg = sdb->table.sgl; |
| 461 | out: |
| 462 | return urb; |
| 463 | } |
| 464 | |
| 465 | static struct urb *uas_alloc_sense_urb(struct uas_dev_info *devinfo, gfp_t gfp, |
Hans de Goede | 2d75b9c | 2014-10-03 12:08:56 +0200 | [diff] [blame] | 466 | struct scsi_cmnd *cmnd) |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 467 | { |
| 468 | struct usb_device *udev = devinfo->udev; |
Bart Van Assche | 5dfcf1a | 2022-02-18 11:51:13 -0800 | [diff] [blame] | 469 | struct uas_cmd_info *cmdinfo = scsi_cmd_priv(cmnd); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 470 | struct urb *urb = usb_alloc_urb(0, gfp); |
| 471 | struct sense_iu *iu; |
| 472 | |
| 473 | if (!urb) |
| 474 | goto out; |
| 475 | |
Matthew Wilcox | ac563cf | 2010-12-15 15:44:03 -0500 | [diff] [blame] | 476 | iu = kzalloc(sizeof(*iu), gfp); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 477 | if (!iu) |
| 478 | goto free; |
| 479 | |
| 480 | usb_fill_bulk_urb(urb, udev, devinfo->status_pipe, iu, sizeof(*iu), |
Hans de Goede | 2d75b9c | 2014-10-03 12:08:56 +0200 | [diff] [blame] | 481 | uas_stat_cmplt, cmnd->device->host); |
Hans de Goede | e28e2f2f | 2014-10-12 12:19:40 +0200 | [diff] [blame] | 482 | if (devinfo->use_streams) |
| 483 | urb->stream_id = cmdinfo->uas_tag; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 484 | urb->transfer_flags |= URB_FREE_BUFFER; |
| 485 | out: |
| 486 | return urb; |
| 487 | free: |
| 488 | usb_free_urb(urb); |
| 489 | return NULL; |
| 490 | } |
| 491 | |
| 492 | static struct urb *uas_alloc_cmd_urb(struct uas_dev_info *devinfo, gfp_t gfp, |
Hans de Goede | a887cd3 | 2013-10-17 19:47:28 +0200 | [diff] [blame] | 493 | struct scsi_cmnd *cmnd) |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 494 | { |
| 495 | struct usb_device *udev = devinfo->udev; |
| 496 | struct scsi_device *sdev = cmnd->device; |
Bart Van Assche | 5dfcf1a | 2022-02-18 11:51:13 -0800 | [diff] [blame] | 497 | struct uas_cmd_info *cmdinfo = scsi_cmd_priv(cmnd); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 498 | struct urb *urb = usb_alloc_urb(0, gfp); |
| 499 | struct command_iu *iu; |
| 500 | int len; |
| 501 | |
| 502 | if (!urb) |
| 503 | goto out; |
| 504 | |
| 505 | len = cmnd->cmd_len - 16; |
| 506 | if (len < 0) |
| 507 | len = 0; |
| 508 | len = ALIGN(len, 4); |
Matthew Wilcox | ac563cf | 2010-12-15 15:44:03 -0500 | [diff] [blame] | 509 | iu = kzalloc(sizeof(*iu) + len, gfp); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 510 | if (!iu) |
| 511 | goto free; |
| 512 | |
| 513 | iu->iu_id = IU_ID_COMMAND; |
Hans de Goede | e28e2f2f | 2014-10-12 12:19:40 +0200 | [diff] [blame] | 514 | iu->tag = cpu_to_be16(cmdinfo->uas_tag); |
Christoph Hellwig | 02e031c | 2010-11-10 14:54:09 +0100 | [diff] [blame] | 515 | iu->prio_attr = UAS_SIMPLE_TAG; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 516 | iu->len = len; |
| 517 | int_to_scsilun(sdev->lun, &iu->lun); |
| 518 | memcpy(iu->cdb, cmnd->cmnd, cmnd->cmd_len); |
| 519 | |
| 520 | usb_fill_bulk_urb(urb, udev, devinfo->cmd_pipe, iu, sizeof(*iu) + len, |
Hans de Goede | b6823c5 | 2014-09-13 12:26:39 +0200 | [diff] [blame] | 521 | uas_cmd_cmplt, NULL); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 522 | urb->transfer_flags |= URB_FREE_BUFFER; |
| 523 | out: |
| 524 | return urb; |
| 525 | free: |
| 526 | usb_free_urb(urb); |
| 527 | return NULL; |
| 528 | } |
| 529 | |
| 530 | /* |
| 531 | * Why should I request the Status IU before sending the Command IU? Spec |
| 532 | * says to, but also says the device may receive them in any order. Seems |
| 533 | * daft to me. |
| 534 | */ |
| 535 | |
Hans de Goede | 2d75b9c | 2014-10-03 12:08:56 +0200 | [diff] [blame] | 536 | static struct urb *uas_submit_sense_urb(struct scsi_cmnd *cmnd, gfp_t gfp) |
Gerd Hoffmann | e9bd7e1 | 2012-06-19 09:54:50 +0200 | [diff] [blame] | 537 | { |
Hans de Goede | 2d75b9c | 2014-10-03 12:08:56 +0200 | [diff] [blame] | 538 | struct uas_dev_info *devinfo = cmnd->device->hostdata; |
Gerd Hoffmann | e9bd7e1 | 2012-06-19 09:54:50 +0200 | [diff] [blame] | 539 | struct urb *urb; |
Hans de Goede | 876285c | 2013-11-07 08:52:42 +0100 | [diff] [blame] | 540 | int err; |
Gerd Hoffmann | e9bd7e1 | 2012-06-19 09:54:50 +0200 | [diff] [blame] | 541 | |
Hans de Goede | 2d75b9c | 2014-10-03 12:08:56 +0200 | [diff] [blame] | 542 | urb = uas_alloc_sense_urb(devinfo, gfp, cmnd); |
Gerd Hoffmann | e9bd7e1 | 2012-06-19 09:54:50 +0200 | [diff] [blame] | 543 | if (!urb) |
Hans de Goede | 70cf0fb | 2013-10-29 10:37:23 +0100 | [diff] [blame] | 544 | return NULL; |
Hans de Goede | d5f808d | 2013-10-17 19:30:26 +0200 | [diff] [blame] | 545 | usb_anchor_urb(urb, &devinfo->sense_urbs); |
Hans de Goede | 876285c | 2013-11-07 08:52:42 +0100 | [diff] [blame] | 546 | err = usb_submit_urb(urb, gfp); |
| 547 | if (err) { |
Hans de Goede | d5f808d | 2013-10-17 19:30:26 +0200 | [diff] [blame] | 548 | usb_unanchor_urb(urb); |
Hans de Goede | 1ad7ed5 | 2014-09-13 12:26:49 +0200 | [diff] [blame] | 549 | uas_log_cmd_state(cmnd, "sense submit err", err); |
Gerd Hoffmann | e9bd7e1 | 2012-06-19 09:54:50 +0200 | [diff] [blame] | 550 | usb_free_urb(urb); |
Hans de Goede | 70cf0fb | 2013-10-29 10:37:23 +0100 | [diff] [blame] | 551 | return NULL; |
Gerd Hoffmann | e9bd7e1 | 2012-06-19 09:54:50 +0200 | [diff] [blame] | 552 | } |
Hans de Goede | 70cf0fb | 2013-10-29 10:37:23 +0100 | [diff] [blame] | 553 | return urb; |
Gerd Hoffmann | e9bd7e1 | 2012-06-19 09:54:50 +0200 | [diff] [blame] | 554 | } |
| 555 | |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 556 | static int uas_submit_urbs(struct scsi_cmnd *cmnd, |
Oliver Neukum | b36d839 | 2015-11-03 16:43:17 +0100 | [diff] [blame] | 557 | struct uas_dev_info *devinfo) |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 558 | { |
Bart Van Assche | 5dfcf1a | 2022-02-18 11:51:13 -0800 | [diff] [blame] | 559 | struct uas_cmd_info *cmdinfo = scsi_cmd_priv(cmnd); |
Hans de Goede | 70cf0fb | 2013-10-29 10:37:23 +0100 | [diff] [blame] | 560 | struct urb *urb; |
Hans de Goede | 876285c | 2013-11-07 08:52:42 +0100 | [diff] [blame] | 561 | int err; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 562 | |
Sanjeev Sharma | ab945ef | 2014-08-12 12:10:21 +0530 | [diff] [blame] | 563 | lockdep_assert_held(&devinfo->lock); |
Matthew Wilcox | 92a3f76 | 2010-12-15 15:44:04 -0500 | [diff] [blame] | 564 | if (cmdinfo->state & SUBMIT_STATUS_URB) { |
Oliver Neukum | b36d839 | 2015-11-03 16:43:17 +0100 | [diff] [blame] | 565 | urb = uas_submit_sense_urb(cmnd, GFP_ATOMIC); |
Hans de Goede | 70cf0fb | 2013-10-29 10:37:23 +0100 | [diff] [blame] | 566 | if (!urb) |
| 567 | return SCSI_MLQUEUE_DEVICE_BUSY; |
Matthew Wilcox | 92a3f76 | 2010-12-15 15:44:04 -0500 | [diff] [blame] | 568 | cmdinfo->state &= ~SUBMIT_STATUS_URB; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 569 | } |
| 570 | |
| 571 | if (cmdinfo->state & ALLOC_DATA_IN_URB) { |
Oliver Neukum | b36d839 | 2015-11-03 16:43:17 +0100 | [diff] [blame] | 572 | cmdinfo->data_in_urb = uas_alloc_data_urb(devinfo, GFP_ATOMIC, |
Hans de Goede | 2d75b9c | 2014-10-03 12:08:56 +0200 | [diff] [blame] | 573 | cmnd, DMA_FROM_DEVICE); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 574 | if (!cmdinfo->data_in_urb) |
| 575 | return SCSI_MLQUEUE_DEVICE_BUSY; |
| 576 | cmdinfo->state &= ~ALLOC_DATA_IN_URB; |
| 577 | } |
| 578 | |
| 579 | if (cmdinfo->state & SUBMIT_DATA_IN_URB) { |
Hans de Goede | d5f808d | 2013-10-17 19:30:26 +0200 | [diff] [blame] | 580 | usb_anchor_urb(cmdinfo->data_in_urb, &devinfo->data_urbs); |
Oliver Neukum | b36d839 | 2015-11-03 16:43:17 +0100 | [diff] [blame] | 581 | err = usb_submit_urb(cmdinfo->data_in_urb, GFP_ATOMIC); |
Hans de Goede | 876285c | 2013-11-07 08:52:42 +0100 | [diff] [blame] | 582 | if (err) { |
Hans de Goede | d5f808d | 2013-10-17 19:30:26 +0200 | [diff] [blame] | 583 | usb_unanchor_urb(cmdinfo->data_in_urb); |
Hans de Goede | 1ad7ed5 | 2014-09-13 12:26:49 +0200 | [diff] [blame] | 584 | uas_log_cmd_state(cmnd, "data in submit err", err); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 585 | return SCSI_MLQUEUE_DEVICE_BUSY; |
| 586 | } |
| 587 | cmdinfo->state &= ~SUBMIT_DATA_IN_URB; |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 588 | cmdinfo->state |= DATA_IN_URB_INFLIGHT; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 589 | } |
| 590 | |
| 591 | if (cmdinfo->state & ALLOC_DATA_OUT_URB) { |
Oliver Neukum | b36d839 | 2015-11-03 16:43:17 +0100 | [diff] [blame] | 592 | cmdinfo->data_out_urb = uas_alloc_data_urb(devinfo, GFP_ATOMIC, |
Hans de Goede | 2d75b9c | 2014-10-03 12:08:56 +0200 | [diff] [blame] | 593 | cmnd, DMA_TO_DEVICE); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 594 | if (!cmdinfo->data_out_urb) |
| 595 | return SCSI_MLQUEUE_DEVICE_BUSY; |
| 596 | cmdinfo->state &= ~ALLOC_DATA_OUT_URB; |
| 597 | } |
| 598 | |
| 599 | if (cmdinfo->state & SUBMIT_DATA_OUT_URB) { |
Hans de Goede | d5f808d | 2013-10-17 19:30:26 +0200 | [diff] [blame] | 600 | usb_anchor_urb(cmdinfo->data_out_urb, &devinfo->data_urbs); |
Oliver Neukum | b36d839 | 2015-11-03 16:43:17 +0100 | [diff] [blame] | 601 | err = usb_submit_urb(cmdinfo->data_out_urb, GFP_ATOMIC); |
Hans de Goede | 876285c | 2013-11-07 08:52:42 +0100 | [diff] [blame] | 602 | if (err) { |
Hans de Goede | d5f808d | 2013-10-17 19:30:26 +0200 | [diff] [blame] | 603 | usb_unanchor_urb(cmdinfo->data_out_urb); |
Hans de Goede | 1ad7ed5 | 2014-09-13 12:26:49 +0200 | [diff] [blame] | 604 | uas_log_cmd_state(cmnd, "data out submit err", err); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 605 | return SCSI_MLQUEUE_DEVICE_BUSY; |
| 606 | } |
| 607 | cmdinfo->state &= ~SUBMIT_DATA_OUT_URB; |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 608 | cmdinfo->state |= DATA_OUT_URB_INFLIGHT; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 609 | } |
| 610 | |
| 611 | if (cmdinfo->state & ALLOC_CMD_URB) { |
Oliver Neukum | b36d839 | 2015-11-03 16:43:17 +0100 | [diff] [blame] | 612 | cmdinfo->cmd_urb = uas_alloc_cmd_urb(devinfo, GFP_ATOMIC, cmnd); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 613 | if (!cmdinfo->cmd_urb) |
| 614 | return SCSI_MLQUEUE_DEVICE_BUSY; |
| 615 | cmdinfo->state &= ~ALLOC_CMD_URB; |
| 616 | } |
| 617 | |
| 618 | if (cmdinfo->state & SUBMIT_CMD_URB) { |
Hans de Goede | d5f808d | 2013-10-17 19:30:26 +0200 | [diff] [blame] | 619 | usb_anchor_urb(cmdinfo->cmd_urb, &devinfo->cmd_urbs); |
Oliver Neukum | b36d839 | 2015-11-03 16:43:17 +0100 | [diff] [blame] | 620 | err = usb_submit_urb(cmdinfo->cmd_urb, GFP_ATOMIC); |
Hans de Goede | 876285c | 2013-11-07 08:52:42 +0100 | [diff] [blame] | 621 | if (err) { |
Hans de Goede | d5f808d | 2013-10-17 19:30:26 +0200 | [diff] [blame] | 622 | usb_unanchor_urb(cmdinfo->cmd_urb); |
Hans de Goede | 1ad7ed5 | 2014-09-13 12:26:49 +0200 | [diff] [blame] | 623 | uas_log_cmd_state(cmnd, "cmd submit err", err); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 624 | return SCSI_MLQUEUE_DEVICE_BUSY; |
| 625 | } |
Gerd Hoffmann | a0e39e3 | 2012-09-25 10:47:04 +0200 | [diff] [blame] | 626 | cmdinfo->cmd_urb = NULL; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 627 | cmdinfo->state &= ~SUBMIT_CMD_URB; |
Gerd Hoffmann | b1d6769 | 2012-06-19 09:54:51 +0200 | [diff] [blame] | 628 | cmdinfo->state |= COMMAND_INFLIGHT; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 629 | } |
| 630 | |
| 631 | return 0; |
| 632 | } |
| 633 | |
Bart Van Assche | af049df | 2021-10-07 13:46:14 -0700 | [diff] [blame] | 634 | static int uas_queuecommand_lck(struct scsi_cmnd *cmnd) |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 635 | { |
| 636 | struct scsi_device *sdev = cmnd->device; |
| 637 | struct uas_dev_info *devinfo = sdev->hostdata; |
Bart Van Assche | 5dfcf1a | 2022-02-18 11:51:13 -0800 | [diff] [blame] | 638 | struct uas_cmd_info *cmdinfo = scsi_cmd_priv(cmnd); |
Gerd Hoffmann | e064852 | 2012-09-25 10:47:08 +0200 | [diff] [blame] | 639 | unsigned long flags; |
Hans de Goede | e28e2f2f | 2014-10-12 12:19:40 +0200 | [diff] [blame] | 640 | int idx, err; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 641 | |
Hans de Goede | f9dc024 | 2014-09-13 12:26:42 +0200 | [diff] [blame] | 642 | /* Re-check scsi_block_requests now that we've the host-lock */ |
| 643 | if (cmnd->device->host->host_self_blocked) |
| 644 | return SCSI_MLQUEUE_DEVICE_BUSY; |
| 645 | |
Hans de Goede | 5930785 | 2014-09-15 16:04:12 +0200 | [diff] [blame] | 646 | if ((devinfo->flags & US_FL_NO_ATA_1X) && |
| 647 | (cmnd->cmnd[0] == ATA_12 || cmnd->cmnd[0] == ATA_16)) { |
| 648 | memcpy(cmnd->sense_buffer, usb_stor_sense_invalidCDB, |
| 649 | sizeof(usb_stor_sense_invalidCDB)); |
| 650 | cmnd->result = SAM_STAT_CHECK_CONDITION; |
Bart Van Assche | 46c9794 | 2021-10-07 13:46:10 -0700 | [diff] [blame] | 651 | scsi_done(cmnd); |
Hans de Goede | 5930785 | 2014-09-15 16:04:12 +0200 | [diff] [blame] | 652 | return 0; |
| 653 | } |
| 654 | |
Hans de Goede | c6f6320 | 2013-11-13 09:24:15 +0100 | [diff] [blame] | 655 | spin_lock_irqsave(&devinfo->lock, flags); |
| 656 | |
Gerd Hoffmann | f8be6bf | 2012-11-30 11:54:45 +0100 | [diff] [blame] | 657 | if (devinfo->resetting) { |
Oliver Neukum | 8036a7e | 2020-09-16 11:40:26 +0200 | [diff] [blame] | 658 | set_host_byte(cmnd, DID_ERROR); |
Bart Van Assche | 46c9794 | 2021-10-07 13:46:10 -0700 | [diff] [blame] | 659 | scsi_done(cmnd); |
Oliver Neukum | eb2a86a | 2020-09-16 11:40:25 +0200 | [diff] [blame] | 660 | goto zombie; |
Gerd Hoffmann | f8be6bf | 2012-11-30 11:54:45 +0100 | [diff] [blame] | 661 | } |
| 662 | |
Hans de Goede | e28e2f2f | 2014-10-12 12:19:40 +0200 | [diff] [blame] | 663 | /* Find a free uas-tag */ |
| 664 | for (idx = 0; idx < devinfo->qdepth; idx++) { |
| 665 | if (!devinfo->cmnd[idx]) |
| 666 | break; |
| 667 | } |
| 668 | if (idx == devinfo->qdepth) { |
Gerd Hoffmann | e064852 | 2012-09-25 10:47:08 +0200 | [diff] [blame] | 669 | spin_unlock_irqrestore(&devinfo->lock, flags); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 670 | return SCSI_MLQUEUE_DEVICE_BUSY; |
Gerd Hoffmann | e064852 | 2012-09-25 10:47:08 +0200 | [diff] [blame] | 671 | } |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 672 | |
Hans de Goede | 5e61aed | 2014-09-13 12:26:32 +0200 | [diff] [blame] | 673 | memset(cmdinfo, 0, sizeof(*cmdinfo)); |
Hans de Goede | e28e2f2f | 2014-10-12 12:19:40 +0200 | [diff] [blame] | 674 | cmdinfo->uas_tag = idx + 1; /* uas-tag == usb-stream-id, so 1 based */ |
Hans de Goede | e062000 | 2014-09-13 12:26:31 +0200 | [diff] [blame] | 675 | cmdinfo->state = SUBMIT_STATUS_URB | ALLOC_CMD_URB | SUBMIT_CMD_URB; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 676 | |
| 677 | switch (cmnd->sc_data_direction) { |
| 678 | case DMA_FROM_DEVICE: |
| 679 | cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB; |
| 680 | break; |
| 681 | case DMA_BIDIRECTIONAL: |
| 682 | cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB; |
Gustavo A. R. Silva | df561f66 | 2020-08-23 17:36:59 -0500 | [diff] [blame] | 683 | fallthrough; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 684 | case DMA_TO_DEVICE: |
| 685 | cmdinfo->state |= ALLOC_DATA_OUT_URB | SUBMIT_DATA_OUT_URB; |
Gustavo A. R. Silva | 93c747e | 2020-11-20 12:40:27 -0600 | [diff] [blame] | 686 | break; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 687 | case DMA_NONE: |
| 688 | break; |
| 689 | } |
| 690 | |
Hans de Goede | e28e2f2f | 2014-10-12 12:19:40 +0200 | [diff] [blame] | 691 | if (!devinfo->use_streams) |
Gerd Hoffmann | db32de1 | 2012-06-19 09:54:49 +0200 | [diff] [blame] | 692 | cmdinfo->state &= ~(SUBMIT_DATA_IN_URB | SUBMIT_DATA_OUT_URB); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 693 | |
Oliver Neukum | b36d839 | 2015-11-03 16:43:17 +0100 | [diff] [blame] | 694 | err = uas_submit_urbs(cmnd, devinfo); |
Oliver Neukum | eb2a86a | 2020-09-16 11:40:25 +0200 | [diff] [blame] | 695 | /* |
| 696 | * in case of fatal errors the SCSI layer is peculiar |
| 697 | * a command that has finished is a success for the purpose |
| 698 | * of queueing, no matter how fatal the error |
| 699 | */ |
| 700 | if (err == -ENODEV) { |
Oliver Neukum | 8036a7e | 2020-09-16 11:40:26 +0200 | [diff] [blame] | 701 | set_host_byte(cmnd, DID_ERROR); |
Bart Van Assche | 46c9794 | 2021-10-07 13:46:10 -0700 | [diff] [blame] | 702 | scsi_done(cmnd); |
Oliver Neukum | eb2a86a | 2020-09-16 11:40:25 +0200 | [diff] [blame] | 703 | goto zombie; |
| 704 | } |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 705 | if (err) { |
| 706 | /* If we did nothing, give up now */ |
Matthew Wilcox | 92a3f76 | 2010-12-15 15:44:04 -0500 | [diff] [blame] | 707 | if (cmdinfo->state & SUBMIT_STATUS_URB) { |
Gerd Hoffmann | e064852 | 2012-09-25 10:47:08 +0200 | [diff] [blame] | 708 | spin_unlock_irqrestore(&devinfo->lock, flags); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 709 | return SCSI_MLQUEUE_DEVICE_BUSY; |
| 710 | } |
Bart Van Assche | 5dfcf1a | 2022-02-18 11:51:13 -0800 | [diff] [blame] | 711 | uas_add_work(cmnd); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 712 | } |
| 713 | |
Hans de Goede | e28e2f2f | 2014-10-12 12:19:40 +0200 | [diff] [blame] | 714 | devinfo->cmnd[idx] = cmnd; |
Oliver Neukum | eb2a86a | 2020-09-16 11:40:25 +0200 | [diff] [blame] | 715 | zombie: |
Gerd Hoffmann | e064852 | 2012-09-25 10:47:08 +0200 | [diff] [blame] | 716 | spin_unlock_irqrestore(&devinfo->lock, flags); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 717 | return 0; |
| 718 | } |
| 719 | |
Jeff Garzik | f281233 | 2010-11-16 02:10:29 -0500 | [diff] [blame] | 720 | static DEF_SCSI_QCMD(uas_queuecommand) |
| 721 | |
Hans de Goede | 616f0e6 | 2014-09-13 12:26:40 +0200 | [diff] [blame] | 722 | /* |
| 723 | * For now we do not support actually sending an abort to the device, so |
| 724 | * this eh always fails. Still we must define it to make sure that we've |
| 725 | * dropped all references to the cmnd in question once this function exits. |
| 726 | */ |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 727 | static int uas_eh_abort_handler(struct scsi_cmnd *cmnd) |
| 728 | { |
Bart Van Assche | 5dfcf1a | 2022-02-18 11:51:13 -0800 | [diff] [blame] | 729 | struct uas_cmd_info *cmdinfo = scsi_cmd_priv(cmnd); |
Gerd Hoffmann | e064852 | 2012-09-25 10:47:08 +0200 | [diff] [blame] | 730 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
Hans de Goede | 616f0e6 | 2014-09-13 12:26:40 +0200 | [diff] [blame] | 731 | struct urb *data_in_urb = NULL; |
| 732 | struct urb *data_out_urb = NULL; |
Gerd Hoffmann | e064852 | 2012-09-25 10:47:08 +0200 | [diff] [blame] | 733 | unsigned long flags; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 734 | |
Gerd Hoffmann | e064852 | 2012-09-25 10:47:08 +0200 | [diff] [blame] | 735 | spin_lock_irqsave(&devinfo->lock, flags); |
Hans de Goede | c6f6320 | 2013-11-13 09:24:15 +0100 | [diff] [blame] | 736 | |
Hans de Goede | 1ad7ed5 | 2014-09-13 12:26:49 +0200 | [diff] [blame] | 737 | uas_log_cmd_state(cmnd, __func__, 0); |
Hans de Goede | 616f0e6 | 2014-09-13 12:26:40 +0200 | [diff] [blame] | 738 | |
| 739 | /* Ensure that try_complete does not call scsi_done */ |
| 740 | cmdinfo->state |= COMMAND_ABORTED; |
| 741 | |
| 742 | /* Drop all refs to this cmnd, kill data urbs to break their ref */ |
Hans de Goede | e28e2f2f | 2014-10-12 12:19:40 +0200 | [diff] [blame] | 743 | devinfo->cmnd[cmdinfo->uas_tag - 1] = NULL; |
Hans de Goede | 616f0e6 | 2014-09-13 12:26:40 +0200 | [diff] [blame] | 744 | if (cmdinfo->state & DATA_IN_URB_INFLIGHT) |
| 745 | data_in_urb = usb_get_urb(cmdinfo->data_in_urb); |
| 746 | if (cmdinfo->state & DATA_OUT_URB_INFLIGHT) |
| 747 | data_out_urb = usb_get_urb(cmdinfo->data_out_urb); |
| 748 | |
Hans de Goede | 4c5481e | 2014-09-13 12:26:41 +0200 | [diff] [blame] | 749 | uas_free_unsubmitted_urbs(cmnd); |
| 750 | |
Hans de Goede | 616f0e6 | 2014-09-13 12:26:40 +0200 | [diff] [blame] | 751 | spin_unlock_irqrestore(&devinfo->lock, flags); |
| 752 | |
| 753 | if (data_in_urb) { |
| 754 | usb_kill_urb(data_in_urb); |
| 755 | usb_put_urb(data_in_urb); |
| 756 | } |
| 757 | if (data_out_urb) { |
| 758 | usb_kill_urb(data_out_urb); |
| 759 | usb_put_urb(data_out_urb); |
Hans de Goede | c6f6320 | 2013-11-13 09:24:15 +0100 | [diff] [blame] | 760 | } |
| 761 | |
Hans de Goede | 616f0e6 | 2014-09-13 12:26:40 +0200 | [diff] [blame] | 762 | return FAILED; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 763 | } |
| 764 | |
Hannes Reinecke | e13849b | 2017-08-25 13:57:01 +0200 | [diff] [blame] | 765 | static int uas_eh_device_reset_handler(struct scsi_cmnd *cmnd) |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 766 | { |
| 767 | struct scsi_device *sdev = cmnd->device; |
| 768 | struct uas_dev_info *devinfo = sdev->hostdata; |
| 769 | struct usb_device *udev = devinfo->udev; |
Hans de Goede | b7b5d11 | 2014-09-13 12:26:30 +0200 | [diff] [blame] | 770 | unsigned long flags; |
Gerd Hoffmann | 023b515 | 2012-06-19 09:54:54 +0200 | [diff] [blame] | 771 | int err; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 772 | |
Hans de Goede | be326f4 | 2013-09-22 16:27:02 +0200 | [diff] [blame] | 773 | err = usb_lock_device_for_reset(udev, devinfo->intf); |
| 774 | if (err) { |
| 775 | shost_printk(KERN_ERR, sdev->host, |
| 776 | "%s FAILED to get lock err %d\n", __func__, err); |
| 777 | return FAILED; |
| 778 | } |
| 779 | |
Gerd Hoffmann | 326349f | 2013-09-13 13:27:13 +0200 | [diff] [blame] | 780 | shost_printk(KERN_INFO, sdev->host, "%s start\n", __func__); |
Hans de Goede | b7b5d11 | 2014-09-13 12:26:30 +0200 | [diff] [blame] | 781 | |
| 782 | spin_lock_irqsave(&devinfo->lock, flags); |
Gerd Hoffmann | 023b515 | 2012-06-19 09:54:54 +0200 | [diff] [blame] | 783 | devinfo->resetting = 1; |
Hans de Goede | b7b5d11 | 2014-09-13 12:26:30 +0200 | [diff] [blame] | 784 | spin_unlock_irqrestore(&devinfo->lock, flags); |
| 785 | |
Gerd Hoffmann | a0e39e3 | 2012-09-25 10:47:04 +0200 | [diff] [blame] | 786 | usb_kill_anchored_urbs(&devinfo->cmd_urbs); |
Gerd Hoffmann | 023b515 | 2012-06-19 09:54:54 +0200 | [diff] [blame] | 787 | usb_kill_anchored_urbs(&devinfo->sense_urbs); |
| 788 | usb_kill_anchored_urbs(&devinfo->data_urbs); |
Hans de Goede | 1589349 | 2014-09-13 12:26:36 +0200 | [diff] [blame] | 789 | uas_zap_pending(devinfo, DID_RESET); |
| 790 | |
Gerd Hoffmann | 023b515 | 2012-06-19 09:54:54 +0200 | [diff] [blame] | 791 | err = usb_reset_device(udev); |
Hans de Goede | b7b5d11 | 2014-09-13 12:26:30 +0200 | [diff] [blame] | 792 | |
| 793 | spin_lock_irqsave(&devinfo->lock, flags); |
Gerd Hoffmann | 023b515 | 2012-06-19 09:54:54 +0200 | [diff] [blame] | 794 | devinfo->resetting = 0; |
Hans de Goede | b7b5d11 | 2014-09-13 12:26:30 +0200 | [diff] [blame] | 795 | spin_unlock_irqrestore(&devinfo->lock, flags); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 796 | |
Hans de Goede | be326f4 | 2013-09-22 16:27:02 +0200 | [diff] [blame] | 797 | usb_unlock_device(udev); |
| 798 | |
Gerd Hoffmann | 023b515 | 2012-06-19 09:54:54 +0200 | [diff] [blame] | 799 | if (err) { |
Hans de Goede | ce39fe6 | 2014-09-13 12:26:50 +0200 | [diff] [blame] | 800 | shost_printk(KERN_INFO, sdev->host, "%s FAILED err %d\n", |
| 801 | __func__, err); |
Gerd Hoffmann | 023b515 | 2012-06-19 09:54:54 +0200 | [diff] [blame] | 802 | return FAILED; |
| 803 | } |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 804 | |
Gerd Hoffmann | 023b515 | 2012-06-19 09:54:54 +0200 | [diff] [blame] | 805 | shost_printk(KERN_INFO, sdev->host, "%s success\n", __func__); |
| 806 | return SUCCESS; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 807 | } |
| 808 | |
Hans de Goede | 1363074 | 2016-04-12 12:27:09 +0200 | [diff] [blame] | 809 | static int uas_target_alloc(struct scsi_target *starget) |
| 810 | { |
| 811 | struct uas_dev_info *devinfo = (struct uas_dev_info *) |
| 812 | dev_to_shost(starget->dev.parent)->hostdata; |
| 813 | |
| 814 | if (devinfo->flags & US_FL_NO_REPORT_LUNS) |
| 815 | starget->no_report_luns = 1; |
| 816 | |
| 817 | return 0; |
| 818 | } |
| 819 | |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 820 | static int uas_slave_alloc(struct scsi_device *sdev) |
| 821 | { |
Hans de Goede | ee136af | 2015-04-21 11:20:31 +0200 | [diff] [blame] | 822 | struct uas_dev_info *devinfo = |
| 823 | (struct uas_dev_info *)sdev->host->hostdata; |
| 824 | |
| 825 | sdev->hostdata = devinfo; |
Hans de Goede | 37599f9 | 2013-11-15 10:04:31 +0100 | [diff] [blame] | 826 | |
Felipe Balbi | f0183a3 | 2016-04-18 13:09:11 +0300 | [diff] [blame] | 827 | /* |
Oliver Neukum | 3ae62a4 | 2019-04-30 12:21:45 +0200 | [diff] [blame] | 828 | * The protocol has no requirements on alignment in the strict sense. |
| 829 | * Controllers may or may not have alignment restrictions. |
| 830 | * As this is not exported, we use an extremely conservative guess. |
Hans de Goede | 37599f9 | 2013-11-15 10:04:31 +0100 | [diff] [blame] | 831 | */ |
| 832 | blk_queue_update_dma_alignment(sdev->request_queue, (512 - 1)); |
| 833 | |
Greg Kroah-Hartman | d5c65d3 | 2020-12-04 16:00:34 +0100 | [diff] [blame] | 834 | if (devinfo->flags & US_FL_MAX_SECTORS_64) |
| 835 | blk_queue_max_hw_sectors(sdev->request_queue, 64); |
| 836 | else if (devinfo->flags & US_FL_MAX_SECTORS_240) |
| 837 | blk_queue_max_hw_sectors(sdev->request_queue, 240); |
| 838 | |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 839 | return 0; |
| 840 | } |
| 841 | |
| 842 | static int uas_slave_configure(struct scsi_device *sdev) |
| 843 | { |
| 844 | struct uas_dev_info *devinfo = sdev->hostdata; |
Hans de Goede | 734016b | 2014-09-16 18:36:52 +0200 | [diff] [blame] | 845 | |
| 846 | if (devinfo->flags & US_FL_NO_REPORT_OPCODES) |
| 847 | sdev->no_report_opcodes = 1; |
| 848 | |
Dmitry Katsubo | 9fa62b1 | 2015-11-20 01:30:44 +0100 | [diff] [blame] | 849 | /* A few buggy USB-ATA bridges don't understand FUA */ |
| 850 | if (devinfo->flags & US_FL_BROKEN_FUA) |
| 851 | sdev->broken_fua = 1; |
| 852 | |
Alexander Kappner | 8c4e97dd | 2018-05-18 21:50:15 -0700 | [diff] [blame] | 853 | /* UAS also needs to support FL_ALWAYS_SYNC */ |
| 854 | if (devinfo->flags & US_FL_ALWAYS_SYNC) { |
| 855 | sdev->skip_ms_page_3f = 1; |
| 856 | sdev->skip_ms_page_8 = 1; |
| 857 | sdev->wce_default_on = 1; |
| 858 | } |
Oliver Neukum | 42d1c6d | 2018-08-09 16:03:37 +0200 | [diff] [blame] | 859 | |
Oliver Neukum | bff000c | 2019-11-14 12:27:56 +0100 | [diff] [blame] | 860 | /* Some disks cannot handle READ_CAPACITY_16 */ |
| 861 | if (devinfo->flags & US_FL_NO_READ_CAPACITY_16) |
| 862 | sdev->no_read_capacity_16 = 1; |
| 863 | |
Oliver Neukum | 8010622 | 2020-12-09 16:26:39 +0100 | [diff] [blame] | 864 | /* Some disks cannot handle WRITE_SAME */ |
| 865 | if (devinfo->flags & US_FL_NO_SAME) |
| 866 | sdev->no_write_same = 1; |
Oliver Neukum | 42d1c6d | 2018-08-09 16:03:37 +0200 | [diff] [blame] | 867 | /* |
| 868 | * Some disks return the total number of blocks in response |
| 869 | * to READ CAPACITY rather than the highest block number. |
| 870 | * If this device makes that mistake, tell the sd driver. |
| 871 | */ |
| 872 | if (devinfo->flags & US_FL_FIX_CAPACITY) |
| 873 | sdev->fix_capacity = 1; |
| 874 | |
| 875 | /* |
Oliver Neukum | 335cbbd | 2019-11-14 12:27:57 +0100 | [diff] [blame] | 876 | * in some cases we have to guess |
| 877 | */ |
| 878 | if (devinfo->flags & US_FL_CAPACITY_HEURISTICS) |
| 879 | sdev->guess_capacity = 1; |
| 880 | |
| 881 | /* |
Oliver Neukum | 42d1c6d | 2018-08-09 16:03:37 +0200 | [diff] [blame] | 882 | * Some devices don't like MODE SENSE with page=0x3f, |
| 883 | * which is the command used for checking if a device |
| 884 | * is write-protected. Now that we tell the sd driver |
| 885 | * to do a 192-byte transfer with this command the |
| 886 | * majority of devices work fine, but a few still can't |
| 887 | * handle it. The sd driver will simply assume those |
| 888 | * devices are write-enabled. |
| 889 | */ |
| 890 | if (devinfo->flags & US_FL_NO_WP_DETECT) |
| 891 | sdev->skip_ms_page_3f = 1; |
| 892 | |
Hans de Goede | 593224e | 2016-05-31 09:18:03 +0200 | [diff] [blame] | 893 | scsi_change_queue_depth(sdev, devinfo->qdepth - 2); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 894 | return 0; |
| 895 | } |
| 896 | |
| 897 | static struct scsi_host_template uas_host_template = { |
| 898 | .module = THIS_MODULE, |
| 899 | .name = "uas", |
| 900 | .queuecommand = uas_queuecommand, |
Hans de Goede | 1363074 | 2016-04-12 12:27:09 +0200 | [diff] [blame] | 901 | .target_alloc = uas_target_alloc, |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 902 | .slave_alloc = uas_slave_alloc, |
| 903 | .slave_configure = uas_slave_configure, |
| 904 | .eh_abort_handler = uas_eh_abort_handler, |
Hannes Reinecke | e13849b | 2017-08-25 13:57:01 +0200 | [diff] [blame] | 905 | .eh_device_reset_handler = uas_eh_device_reset_handler, |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 906 | .this_id = -1, |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 907 | .skip_settle_delay = 1, |
Christoph Hellwig | 4af14d1 | 2018-12-13 16:17:09 +0100 | [diff] [blame] | 908 | .dma_boundary = PAGE_SIZE - 1, |
Bart Van Assche | 5dfcf1a | 2022-02-18 11:51:13 -0800 | [diff] [blame] | 909 | .cmd_size = sizeof(struct uas_cmd_info), |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 910 | }; |
| 911 | |
Hans de Goede | 79b4c06 | 2013-10-25 17:04:33 +0100 | [diff] [blame] | 912 | #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \ |
| 913 | vendorName, productName, useProtocol, useTransport, \ |
| 914 | initFunction, flags) \ |
| 915 | { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \ |
| 916 | .driver_info = (flags) } |
| 917 | |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 918 | static struct usb_device_id uas_usb_ids[] = { |
Hans de Goede | 79b4c06 | 2013-10-25 17:04:33 +0100 | [diff] [blame] | 919 | # include "unusual_uas.h" |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 920 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_BULK) }, |
| 921 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_UAS) }, |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 922 | { } |
| 923 | }; |
| 924 | MODULE_DEVICE_TABLE(usb, uas_usb_ids); |
| 925 | |
Hans de Goede | 79b4c06 | 2013-10-25 17:04:33 +0100 | [diff] [blame] | 926 | #undef UNUSUAL_DEV |
| 927 | |
Hans de Goede | e1be067 | 2013-10-21 08:00:58 +0100 | [diff] [blame] | 928 | static int uas_switch_interface(struct usb_device *udev, |
| 929 | struct usb_interface *intf) |
| 930 | { |
Alan Stern | 786de92 | 2017-09-22 11:56:49 -0400 | [diff] [blame] | 931 | struct usb_host_interface *alt; |
Hans de Goede | e1be067 | 2013-10-21 08:00:58 +0100 | [diff] [blame] | 932 | |
| 933 | alt = uas_find_uas_alt_setting(intf); |
Alan Stern | 786de92 | 2017-09-22 11:56:49 -0400 | [diff] [blame] | 934 | if (!alt) |
| 935 | return -ENODEV; |
Hans de Goede | e1be067 | 2013-10-21 08:00:58 +0100 | [diff] [blame] | 936 | |
Alan Stern | 786de92 | 2017-09-22 11:56:49 -0400 | [diff] [blame] | 937 | return usb_set_interface(udev, alt->desc.bInterfaceNumber, |
| 938 | alt->desc.bAlternateSetting); |
Hans de Goede | e1be067 | 2013-10-21 08:00:58 +0100 | [diff] [blame] | 939 | } |
| 940 | |
Hans de Goede | 58d5144 | 2013-10-29 10:23:26 +0100 | [diff] [blame] | 941 | static int uas_configure_endpoints(struct uas_dev_info *devinfo) |
Hans de Goede | 34f11e5 | 2013-10-29 08:54:48 +0100 | [diff] [blame] | 942 | { |
| 943 | struct usb_host_endpoint *eps[4] = { }; |
| 944 | struct usb_device *udev = devinfo->udev; |
| 945 | int r; |
| 946 | |
Hans de Goede | 34f11e5 | 2013-10-29 08:54:48 +0100 | [diff] [blame] | 947 | r = uas_find_endpoints(devinfo->intf->cur_altsetting, eps); |
Hans de Goede | 74d71ae | 2013-10-29 10:10:36 +0100 | [diff] [blame] | 948 | if (r) |
| 949 | return r; |
Hans de Goede | 34f11e5 | 2013-10-29 08:54:48 +0100 | [diff] [blame] | 950 | |
Hans de Goede | 74d71ae | 2013-10-29 10:10:36 +0100 | [diff] [blame] | 951 | devinfo->cmd_pipe = usb_sndbulkpipe(udev, |
| 952 | usb_endpoint_num(&eps[0]->desc)); |
| 953 | devinfo->status_pipe = usb_rcvbulkpipe(udev, |
| 954 | usb_endpoint_num(&eps[1]->desc)); |
| 955 | devinfo->data_in_pipe = usb_rcvbulkpipe(udev, |
| 956 | usb_endpoint_num(&eps[2]->desc)); |
| 957 | devinfo->data_out_pipe = usb_sndbulkpipe(udev, |
| 958 | usb_endpoint_num(&eps[3]->desc)); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 959 | |
Hans de Goede | e5e5581 | 2014-09-13 12:26:43 +0200 | [diff] [blame] | 960 | if (udev->speed < USB_SPEED_SUPER) { |
Hans de Goede | e2875c3 | 2014-08-01 17:33:08 +0200 | [diff] [blame] | 961 | devinfo->qdepth = 32; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 962 | devinfo->use_streams = 0; |
| 963 | } else { |
Hans de Goede | 58d5144 | 2013-10-29 10:23:26 +0100 | [diff] [blame] | 964 | devinfo->qdepth = usb_alloc_streams(devinfo->intf, eps + 1, |
Hans de Goede | 5e61aed | 2014-09-13 12:26:32 +0200 | [diff] [blame] | 965 | 3, MAX_CMNDS, GFP_NOIO); |
Hans de Goede | 58d5144 | 2013-10-29 10:23:26 +0100 | [diff] [blame] | 966 | if (devinfo->qdepth < 0) |
| 967 | return devinfo->qdepth; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 968 | devinfo->use_streams = 1; |
| 969 | } |
Hans de Goede | 58d5144 | 2013-10-29 10:23:26 +0100 | [diff] [blame] | 970 | |
| 971 | return 0; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 972 | } |
| 973 | |
Sebastian Andrzej Siewior | dae5154 | 2011-12-19 17:06:08 +0100 | [diff] [blame] | 974 | static void uas_free_streams(struct uas_dev_info *devinfo) |
| 975 | { |
| 976 | struct usb_device *udev = devinfo->udev; |
| 977 | struct usb_host_endpoint *eps[3]; |
| 978 | |
| 979 | eps[0] = usb_pipe_endpoint(udev, devinfo->status_pipe); |
| 980 | eps[1] = usb_pipe_endpoint(udev, devinfo->data_in_pipe); |
| 981 | eps[2] = usb_pipe_endpoint(udev, devinfo->data_out_pipe); |
Oliver Neukum | 94d72f0 | 2014-03-28 11:25:50 +0100 | [diff] [blame] | 982 | usb_free_streams(devinfo->intf, eps, 3, GFP_NOIO); |
Sebastian Andrzej Siewior | dae5154 | 2011-12-19 17:06:08 +0100 | [diff] [blame] | 983 | } |
| 984 | |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 985 | static int uas_probe(struct usb_interface *intf, const struct usb_device_id *id) |
| 986 | { |
Hans de Goede | 6ce8213 | 2013-10-17 19:00:45 +0200 | [diff] [blame] | 987 | int result = -ENOMEM; |
| 988 | struct Scsi_Host *shost = NULL; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 989 | struct uas_dev_info *devinfo; |
| 990 | struct usb_device *udev = interface_to_usbdev(intf); |
Hans de Goede | a5011d4 | 2015-04-21 11:20:30 +0200 | [diff] [blame] | 991 | unsigned long dev_flags; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 992 | |
Hans de Goede | a5011d4 | 2015-04-21 11:20:30 +0200 | [diff] [blame] | 993 | if (!uas_use_uas_driver(intf, id, &dev_flags)) |
Hans de Goede | 79b4c06 | 2013-10-25 17:04:33 +0100 | [diff] [blame] | 994 | return -ENODEV; |
| 995 | |
Matthew Wilcox | 89dc290 | 2010-12-15 15:44:05 -0500 | [diff] [blame] | 996 | if (uas_switch_interface(udev, intf)) |
| 997 | return -ENODEV; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 998 | |
Hans de Goede | 21fc05b | 2013-11-13 09:32:22 +0100 | [diff] [blame] | 999 | shost = scsi_host_alloc(&uas_host_template, |
| 1000 | sizeof(struct uas_dev_info)); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 1001 | if (!shost) |
Hans de Goede | 6ce8213 | 2013-10-17 19:00:45 +0200 | [diff] [blame] | 1002 | goto set_alt0; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 1003 | |
| 1004 | shost->max_cmd_len = 16 + 252; |
| 1005 | shost->max_id = 1; |
Gerd Hoffmann | bde027b | 2013-01-25 15:03:36 +0100 | [diff] [blame] | 1006 | shost->max_lun = 256; |
| 1007 | shost->max_channel = 0; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 1008 | shost->sg_tablesize = udev->bus->sg_tablesize; |
| 1009 | |
Hans de Goede | 21fc05b | 2013-11-13 09:32:22 +0100 | [diff] [blame] | 1010 | devinfo = (struct uas_dev_info *)shost->hostdata; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 1011 | devinfo->intf = intf; |
| 1012 | devinfo->udev = udev; |
Gerd Hoffmann | 023b515 | 2012-06-19 09:54:54 +0200 | [diff] [blame] | 1013 | devinfo->resetting = 0; |
Hans de Goede | da65c2b | 2013-11-11 11:51:42 +0100 | [diff] [blame] | 1014 | devinfo->shutdown = 0; |
Hans de Goede | a5011d4 | 2015-04-21 11:20:30 +0200 | [diff] [blame] | 1015 | devinfo->flags = dev_flags; |
Gerd Hoffmann | a0e39e3 | 2012-09-25 10:47:04 +0200 | [diff] [blame] | 1016 | init_usb_anchor(&devinfo->cmd_urbs); |
Gerd Hoffmann | bdd000f | 2012-06-19 09:54:53 +0200 | [diff] [blame] | 1017 | init_usb_anchor(&devinfo->sense_urbs); |
| 1018 | init_usb_anchor(&devinfo->data_urbs); |
Gerd Hoffmann | e064852 | 2012-09-25 10:47:08 +0200 | [diff] [blame] | 1019 | spin_lock_init(&devinfo->lock); |
Gerd Hoffmann | 1bf8198 | 2013-09-13 13:27:12 +0200 | [diff] [blame] | 1020 | INIT_WORK(&devinfo->work, uas_do_work); |
EJ Hsu | 3e99862 | 2020-01-30 01:25:06 -0800 | [diff] [blame] | 1021 | INIT_WORK(&devinfo->scan_work, uas_scan_work); |
Hans de Goede | 58d5144 | 2013-10-29 10:23:26 +0100 | [diff] [blame] | 1022 | |
| 1023 | result = uas_configure_endpoints(devinfo); |
| 1024 | if (result) |
| 1025 | goto set_alt0; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 1026 | |
Hans de Goede | 198de51 | 2016-04-12 12:27:08 +0200 | [diff] [blame] | 1027 | /* |
| 1028 | * 1 tag is reserved for untagged commands + |
| 1029 | * 1 tag to avoid off by one errors in some bridge firmwares |
| 1030 | */ |
| 1031 | shost->can_queue = devinfo->qdepth - 2; |
| 1032 | |
Oliver Neukum | c637f1fa | 2014-03-28 11:29:25 +0100 | [diff] [blame] | 1033 | usb_set_intfdata(intf, shost); |
Greg Kroah-Hartman | d5c65d3 | 2020-12-04 16:00:34 +0100 | [diff] [blame] | 1034 | result = scsi_add_host(shost, &intf->dev); |
Sebastian Andrzej Siewior | dae5154 | 2011-12-19 17:06:08 +0100 | [diff] [blame] | 1035 | if (result) |
Hans de Goede | 6ce8213 | 2013-10-17 19:00:45 +0200 | [diff] [blame] | 1036 | goto free_streams; |
Sebastian Andrzej Siewior | dae5154 | 2011-12-19 17:06:08 +0100 | [diff] [blame] | 1037 | |
EJ Hsu | 3e99862 | 2020-01-30 01:25:06 -0800 | [diff] [blame] | 1038 | /* Submit the delayed_work for SCSI-device scanning */ |
| 1039 | schedule_work(&devinfo->scan_work); |
| 1040 | |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 1041 | return result; |
Sebastian Andrzej Siewior | dae5154 | 2011-12-19 17:06:08 +0100 | [diff] [blame] | 1042 | |
Hans de Goede | 6ce8213 | 2013-10-17 19:00:45 +0200 | [diff] [blame] | 1043 | free_streams: |
Sebastian Andrzej Siewior | dae5154 | 2011-12-19 17:06:08 +0100 | [diff] [blame] | 1044 | uas_free_streams(devinfo); |
Oliver Neukum | c637f1fa | 2014-03-28 11:29:25 +0100 | [diff] [blame] | 1045 | usb_set_intfdata(intf, NULL); |
Hans de Goede | 6ce8213 | 2013-10-17 19:00:45 +0200 | [diff] [blame] | 1046 | set_alt0: |
| 1047 | usb_set_interface(udev, intf->altsetting[0].desc.bInterfaceNumber, 0); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 1048 | if (shost) |
| 1049 | scsi_host_put(shost); |
| 1050 | return result; |
| 1051 | } |
| 1052 | |
Hans de Goede | f9dc024 | 2014-09-13 12:26:42 +0200 | [diff] [blame] | 1053 | static int uas_cmnd_list_empty(struct uas_dev_info *devinfo) |
| 1054 | { |
| 1055 | unsigned long flags; |
| 1056 | int i, r = 1; |
| 1057 | |
| 1058 | spin_lock_irqsave(&devinfo->lock, flags); |
| 1059 | |
| 1060 | for (i = 0; i < devinfo->qdepth; i++) { |
| 1061 | if (devinfo->cmnd[i]) { |
| 1062 | r = 0; /* Not empty */ |
| 1063 | break; |
| 1064 | } |
| 1065 | } |
| 1066 | |
| 1067 | spin_unlock_irqrestore(&devinfo->lock, flags); |
| 1068 | |
| 1069 | return r; |
| 1070 | } |
| 1071 | |
| 1072 | /* |
| 1073 | * Wait for any pending cmnds to complete, on usb-2 sense_urbs may temporarily |
| 1074 | * get empty while there still is more work to do due to sense-urbs completing |
| 1075 | * with a READ/WRITE_READY iu code, so keep waiting until the list gets empty. |
| 1076 | */ |
| 1077 | static int uas_wait_for_pending_cmnds(struct uas_dev_info *devinfo) |
| 1078 | { |
| 1079 | unsigned long start_time; |
| 1080 | int r; |
| 1081 | |
| 1082 | start_time = jiffies; |
| 1083 | do { |
| 1084 | flush_work(&devinfo->work); |
| 1085 | |
| 1086 | r = usb_wait_anchor_empty_timeout(&devinfo->sense_urbs, 5000); |
| 1087 | if (r == 0) |
| 1088 | return -ETIME; |
| 1089 | |
| 1090 | r = usb_wait_anchor_empty_timeout(&devinfo->data_urbs, 500); |
| 1091 | if (r == 0) |
| 1092 | return -ETIME; |
| 1093 | |
| 1094 | if (time_after(jiffies, start_time + 5 * HZ)) |
| 1095 | return -ETIME; |
| 1096 | } while (!uas_cmnd_list_empty(devinfo)); |
| 1097 | |
| 1098 | return 0; |
| 1099 | } |
| 1100 | |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 1101 | static int uas_pre_reset(struct usb_interface *intf) |
| 1102 | { |
Hans de Goede | 4de7a373 | 2013-10-22 16:10:44 +0100 | [diff] [blame] | 1103 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
Hans de Goede | 21fc05b | 2013-11-13 09:32:22 +0100 | [diff] [blame] | 1104 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
Hans de Goede | 4de7a373 | 2013-10-22 16:10:44 +0100 | [diff] [blame] | 1105 | unsigned long flags; |
| 1106 | |
Hans de Goede | da65c2b | 2013-11-11 11:51:42 +0100 | [diff] [blame] | 1107 | if (devinfo->shutdown) |
| 1108 | return 0; |
| 1109 | |
Hans de Goede | 4de7a373 | 2013-10-22 16:10:44 +0100 | [diff] [blame] | 1110 | /* Block new requests */ |
| 1111 | spin_lock_irqsave(shost->host_lock, flags); |
| 1112 | scsi_block_requests(shost); |
| 1113 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 1114 | |
Hans de Goede | f9dc024 | 2014-09-13 12:26:42 +0200 | [diff] [blame] | 1115 | if (uas_wait_for_pending_cmnds(devinfo) != 0) { |
Hans de Goede | 4de7a373 | 2013-10-22 16:10:44 +0100 | [diff] [blame] | 1116 | shost_printk(KERN_ERR, shost, "%s: timed out\n", __func__); |
Hans de Goede | f9dc024 | 2014-09-13 12:26:42 +0200 | [diff] [blame] | 1117 | scsi_unblock_requests(shost); |
Hans de Goede | 4de7a373 | 2013-10-22 16:10:44 +0100 | [diff] [blame] | 1118 | return 1; |
| 1119 | } |
| 1120 | |
| 1121 | uas_free_streams(devinfo); |
| 1122 | |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 1123 | return 0; |
| 1124 | } |
| 1125 | |
| 1126 | static int uas_post_reset(struct usb_interface *intf) |
| 1127 | { |
Hans de Goede | 4de7a373 | 2013-10-22 16:10:44 +0100 | [diff] [blame] | 1128 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
Hans de Goede | 21fc05b | 2013-11-13 09:32:22 +0100 | [diff] [blame] | 1129 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
Hans de Goede | 4de7a373 | 2013-10-22 16:10:44 +0100 | [diff] [blame] | 1130 | unsigned long flags; |
Hans de Goede | ce39fe6 | 2014-09-13 12:26:50 +0200 | [diff] [blame] | 1131 | int err; |
Hans de Goede | 4de7a373 | 2013-10-22 16:10:44 +0100 | [diff] [blame] | 1132 | |
Hans de Goede | da65c2b | 2013-11-11 11:51:42 +0100 | [diff] [blame] | 1133 | if (devinfo->shutdown) |
| 1134 | return 0; |
| 1135 | |
Hans de Goede | ce39fe6 | 2014-09-13 12:26:50 +0200 | [diff] [blame] | 1136 | err = uas_configure_endpoints(devinfo); |
Oliver Neukum | 9a513c9 | 2018-03-06 15:04:24 +0100 | [diff] [blame] | 1137 | if (err && err != -ENODEV) |
Hans de Goede | 58d5144 | 2013-10-29 10:23:26 +0100 | [diff] [blame] | 1138 | shost_printk(KERN_ERR, shost, |
Hans de Goede | ce39fe6 | 2014-09-13 12:26:50 +0200 | [diff] [blame] | 1139 | "%s: alloc streams error %d after reset", |
| 1140 | __func__, err); |
Hans de Goede | 4de7a373 | 2013-10-22 16:10:44 +0100 | [diff] [blame] | 1141 | |
Oliver Neukum | cbeef22 | 2018-01-11 13:10:16 +0100 | [diff] [blame] | 1142 | /* we must unblock the host in every case lest we deadlock */ |
Hans de Goede | 4de7a373 | 2013-10-22 16:10:44 +0100 | [diff] [blame] | 1143 | spin_lock_irqsave(shost->host_lock, flags); |
| 1144 | scsi_report_bus_reset(shost, 0); |
| 1145 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 1146 | |
| 1147 | scsi_unblock_requests(shost); |
| 1148 | |
Oliver Neukum | cbeef22 | 2018-01-11 13:10:16 +0100 | [diff] [blame] | 1149 | return err ? 1 : 0; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 1150 | } |
| 1151 | |
Hans de Goede | 0df1f66 | 2013-11-07 08:47:05 +0100 | [diff] [blame] | 1152 | static int uas_suspend(struct usb_interface *intf, pm_message_t message) |
| 1153 | { |
| 1154 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
Hans de Goede | 21fc05b | 2013-11-13 09:32:22 +0100 | [diff] [blame] | 1155 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
Hans de Goede | 0df1f66 | 2013-11-07 08:47:05 +0100 | [diff] [blame] | 1156 | |
Hans de Goede | f9dc024 | 2014-09-13 12:26:42 +0200 | [diff] [blame] | 1157 | if (uas_wait_for_pending_cmnds(devinfo) != 0) { |
Hans de Goede | 0df1f66 | 2013-11-07 08:47:05 +0100 | [diff] [blame] | 1158 | shost_printk(KERN_ERR, shost, "%s: timed out\n", __func__); |
| 1159 | return -ETIME; |
| 1160 | } |
| 1161 | |
| 1162 | return 0; |
| 1163 | } |
| 1164 | |
| 1165 | static int uas_resume(struct usb_interface *intf) |
| 1166 | { |
| 1167 | return 0; |
| 1168 | } |
| 1169 | |
| 1170 | static int uas_reset_resume(struct usb_interface *intf) |
| 1171 | { |
| 1172 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
Hans de Goede | 21fc05b | 2013-11-13 09:32:22 +0100 | [diff] [blame] | 1173 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
Hans de Goede | 0df1f66 | 2013-11-07 08:47:05 +0100 | [diff] [blame] | 1174 | unsigned long flags; |
Hans de Goede | ce39fe6 | 2014-09-13 12:26:50 +0200 | [diff] [blame] | 1175 | int err; |
Hans de Goede | 0df1f66 | 2013-11-07 08:47:05 +0100 | [diff] [blame] | 1176 | |
Hans de Goede | ce39fe6 | 2014-09-13 12:26:50 +0200 | [diff] [blame] | 1177 | err = uas_configure_endpoints(devinfo); |
| 1178 | if (err) { |
Hans de Goede | 0df1f66 | 2013-11-07 08:47:05 +0100 | [diff] [blame] | 1179 | shost_printk(KERN_ERR, shost, |
Hans de Goede | ce39fe6 | 2014-09-13 12:26:50 +0200 | [diff] [blame] | 1180 | "%s: alloc streams error %d after reset", |
| 1181 | __func__, err); |
Hans de Goede | 0df1f66 | 2013-11-07 08:47:05 +0100 | [diff] [blame] | 1182 | return -EIO; |
| 1183 | } |
| 1184 | |
| 1185 | spin_lock_irqsave(shost->host_lock, flags); |
| 1186 | scsi_report_bus_reset(shost, 0); |
| 1187 | spin_unlock_irqrestore(shost->host_lock, flags); |
| 1188 | |
| 1189 | return 0; |
| 1190 | } |
| 1191 | |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 1192 | static void uas_disconnect(struct usb_interface *intf) |
| 1193 | { |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 1194 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
Hans de Goede | 21fc05b | 2013-11-13 09:32:22 +0100 | [diff] [blame] | 1195 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
Hans de Goede | b7b5d11 | 2014-09-13 12:26:30 +0200 | [diff] [blame] | 1196 | unsigned long flags; |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 1197 | |
Hans de Goede | b7b5d11 | 2014-09-13 12:26:30 +0200 | [diff] [blame] | 1198 | spin_lock_irqsave(&devinfo->lock, flags); |
Gerd Hoffmann | 4c45697 | 2012-11-30 11:54:44 +0100 | [diff] [blame] | 1199 | devinfo->resetting = 1; |
Hans de Goede | b7b5d11 | 2014-09-13 12:26:30 +0200 | [diff] [blame] | 1200 | spin_unlock_irqrestore(&devinfo->lock, flags); |
| 1201 | |
Gerd Hoffmann | 1bf8198 | 2013-09-13 13:27:12 +0200 | [diff] [blame] | 1202 | cancel_work_sync(&devinfo->work); |
Gerd Hoffmann | a0e39e3 | 2012-09-25 10:47:04 +0200 | [diff] [blame] | 1203 | usb_kill_anchored_urbs(&devinfo->cmd_urbs); |
Gerd Hoffmann | bdd000f | 2012-06-19 09:54:53 +0200 | [diff] [blame] | 1204 | usb_kill_anchored_urbs(&devinfo->sense_urbs); |
| 1205 | usb_kill_anchored_urbs(&devinfo->data_urbs); |
Hans de Goede | 1589349 | 2014-09-13 12:26:36 +0200 | [diff] [blame] | 1206 | uas_zap_pending(devinfo, DID_NO_CONNECT); |
| 1207 | |
EJ Hsu | 3e99862 | 2020-01-30 01:25:06 -0800 | [diff] [blame] | 1208 | /* |
| 1209 | * Prevent SCSI scanning (if it hasn't started yet) |
| 1210 | * or wait for the SCSI-scanning routine to stop. |
| 1211 | */ |
| 1212 | cancel_work_sync(&devinfo->scan_work); |
| 1213 | |
Gerd Hoffmann | 4c45697 | 2012-11-30 11:54:44 +0100 | [diff] [blame] | 1214 | scsi_remove_host(shost); |
Sebastian Andrzej Siewior | dae5154 | 2011-12-19 17:06:08 +0100 | [diff] [blame] | 1215 | uas_free_streams(devinfo); |
Hans de Goede | 21fc05b | 2013-11-13 09:32:22 +0100 | [diff] [blame] | 1216 | scsi_host_put(shost); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 1217 | } |
| 1218 | |
Hans de Goede | da65c2b | 2013-11-11 11:51:42 +0100 | [diff] [blame] | 1219 | /* |
| 1220 | * Put the device back in usb-storage mode on shutdown, as some BIOS-es |
| 1221 | * hang on reboot when the device is still in uas mode. Note the reset is |
| 1222 | * necessary as some devices won't revert to usb-storage mode without it. |
| 1223 | */ |
| 1224 | static void uas_shutdown(struct device *dev) |
| 1225 | { |
| 1226 | struct usb_interface *intf = to_usb_interface(dev); |
| 1227 | struct usb_device *udev = interface_to_usbdev(intf); |
| 1228 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
Hans de Goede | 21fc05b | 2013-11-13 09:32:22 +0100 | [diff] [blame] | 1229 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
Hans de Goede | da65c2b | 2013-11-11 11:51:42 +0100 | [diff] [blame] | 1230 | |
| 1231 | if (system_state != SYSTEM_RESTART) |
| 1232 | return; |
| 1233 | |
| 1234 | devinfo->shutdown = 1; |
| 1235 | uas_free_streams(devinfo); |
| 1236 | usb_set_interface(udev, intf->altsetting[0].desc.bInterfaceNumber, 0); |
| 1237 | usb_reset_device(udev); |
| 1238 | } |
| 1239 | |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 1240 | static struct usb_driver uas_driver = { |
| 1241 | .name = "uas", |
| 1242 | .probe = uas_probe, |
| 1243 | .disconnect = uas_disconnect, |
| 1244 | .pre_reset = uas_pre_reset, |
| 1245 | .post_reset = uas_post_reset, |
Hans de Goede | 0df1f66 | 2013-11-07 08:47:05 +0100 | [diff] [blame] | 1246 | .suspend = uas_suspend, |
| 1247 | .resume = uas_resume, |
| 1248 | .reset_resume = uas_reset_resume, |
Hans de Goede | da65c2b | 2013-11-11 11:51:42 +0100 | [diff] [blame] | 1249 | .drvwrap.driver.shutdown = uas_shutdown, |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 1250 | .id_table = uas_usb_ids, |
| 1251 | }; |
| 1252 | |
Oliver Neukum | f6cc609 | 2020-04-15 16:17:50 +0200 | [diff] [blame] | 1253 | static int __init uas_init(void) |
| 1254 | { |
| 1255 | int rv; |
| 1256 | |
| 1257 | workqueue = alloc_workqueue("uas", WQ_MEM_RECLAIM, 0); |
| 1258 | if (!workqueue) |
| 1259 | return -ENOMEM; |
| 1260 | |
| 1261 | rv = usb_register(&uas_driver); |
| 1262 | if (rv) { |
| 1263 | destroy_workqueue(workqueue); |
| 1264 | return -ENOMEM; |
| 1265 | } |
| 1266 | |
| 1267 | return 0; |
| 1268 | } |
| 1269 | |
| 1270 | static void __exit uas_exit(void) |
| 1271 | { |
| 1272 | usb_deregister(&uas_driver); |
| 1273 | destroy_workqueue(workqueue); |
| 1274 | } |
| 1275 | |
| 1276 | module_init(uas_init); |
| 1277 | module_exit(uas_exit); |
Matthew Wilcox | 115bb1f | 2010-10-07 13:05:23 +0200 | [diff] [blame] | 1278 | |
| 1279 | MODULE_LICENSE("GPL"); |
Matthias Maennich | 32bca2d | 2019-09-06 11:32:35 +0100 | [diff] [blame] | 1280 | MODULE_IMPORT_NS(USB_STORAGE); |
Hans de Goede | f50a496 | 2013-10-28 10:48:04 +0000 | [diff] [blame] | 1281 | MODULE_AUTHOR( |
| 1282 | "Hans de Goede <hdegoede@redhat.com>, Matthew Wilcox and Sarah Sharp"); |