Commit | Line | Data |
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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0 |
115bb1ff MW |
2 | /* |
3 | * USB Attached SCSI | |
4 | * Note that this is not the same as the USB Mass Storage driver | |
5 | * | |
13630746 | 6 | * Copyright Hans de Goede <hdegoede@redhat.com> for Red Hat, Inc. 2013 - 2016 |
115bb1ff MW |
7 | * Copyright Matthew Wilcox for Intel Corp, 2010 |
8 | * Copyright Sarah Sharp for Intel Corp, 2010 | |
115bb1ff MW |
9 | */ |
10 | ||
11 | #include <linux/blkdev.h> | |
12 | #include <linux/slab.h> | |
13 | #include <linux/types.h> | |
6eb0de82 | 14 | #include <linux/module.h> |
115bb1ff | 15 | #include <linux/usb.h> |
79b4c061 | 16 | #include <linux/usb_usual.h> |
c898add5 | 17 | #include <linux/usb/hcd.h> |
115bb1ff | 18 | #include <linux/usb/storage.h> |
348748b0 | 19 | #include <linux/usb/uas.h> |
115bb1ff MW |
20 | |
21 | #include <scsi/scsi.h> | |
4de7a373 | 22 | #include <scsi/scsi_eh.h> |
115bb1ff MW |
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 | ||
82aa0387 | 29 | #include "uas-detect.h" |
59307852 | 30 | #include "scsiglue.h" |
82aa0387 | 31 | |
5e61aede | 32 | #define MAX_CMNDS 256 |
115bb1ff | 33 | |
115bb1ff MW |
34 | struct uas_dev_info { |
35 | struct usb_interface *intf; | |
36 | struct usb_device *udev; | |
a0e39e34 | 37 | struct usb_anchor cmd_urbs; |
bdd000fb GH |
38 | struct usb_anchor sense_urbs; |
39 | struct usb_anchor data_urbs; | |
d181b34b | 40 | u64 flags; |
023b515e | 41 | int qdepth, resetting; |
115bb1ff MW |
42 | unsigned cmd_pipe, status_pipe, data_in_pipe, data_out_pipe; |
43 | unsigned use_streams:1; | |
da65c2bb | 44 | unsigned shutdown:1; |
5e61aede | 45 | struct scsi_cmnd *cmnd[MAX_CMNDS]; |
e0648520 | 46 | spinlock_t lock; |
1bf8198e | 47 | struct work_struct work; |
3e99862c | 48 | struct work_struct scan_work; /* for async scanning */ |
115bb1ff MW |
49 | }; |
50 | ||
51 | enum { | |
76433194 ON |
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), | |
115bb1ff MW |
64 | }; |
65 | ||
66 | /* Overrides scsi_pointer */ | |
67 | struct uas_cmd_info { | |
68 | unsigned int state; | |
e28e2f2f | 69 | unsigned int uas_tag; |
115bb1ff | 70 | struct urb *cmd_urb; |
115bb1ff MW |
71 | struct urb *data_in_urb; |
72 | struct urb *data_out_urb; | |
115bb1ff MW |
73 | }; |
74 | ||
75 | /* I hate forward declarations, but I actually have a loop */ | |
76 | static int uas_submit_urbs(struct scsi_cmnd *cmnd, | |
b36d8391 | 77 | struct uas_dev_info *devinfo); |
ea9da1c7 | 78 | static void uas_do_work(struct work_struct *work); |
4c456971 | 79 | static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller); |
d89bd835 | 80 | static void uas_free_streams(struct uas_dev_info *devinfo); |
1ad7ed5a HG |
81 | static void uas_log_cmd_state(struct scsi_cmnd *cmnd, const char *prefix, |
82 | int status); | |
aa8f6123 | 83 | |
f6cc6093 ON |
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 | ||
115bb1ff MW |
97 | static void uas_do_work(struct work_struct *work) |
98 | { | |
1bf8198e GH |
99 | struct uas_dev_info *devinfo = |
100 | container_of(work, struct uas_dev_info, work); | |
115bb1ff | 101 | struct uas_cmd_info *cmdinfo; |
43cd99cb | 102 | struct scsi_cmnd *cmnd; |
e0648520 | 103 | unsigned long flags; |
43cd99cb | 104 | int i, err; |
115bb1ff | 105 | |
1bf8198e | 106 | spin_lock_irqsave(&devinfo->lock, flags); |
b7b5d11f HG |
107 | |
108 | if (devinfo->resetting) | |
109 | goto out; | |
110 | ||
43cd99cb HG |
111 | for (i = 0; i < devinfo->qdepth; i++) { |
112 | if (!devinfo->cmnd[i]) | |
113 | continue; | |
114 | ||
115 | cmnd = devinfo->cmnd[i]; | |
5dfcf1ad | 116 | cmdinfo = scsi_cmd_priv(cmnd); |
61c09ce5 HG |
117 | |
118 | if (!(cmdinfo->state & IS_IN_WORK_LIST)) | |
119 | continue; | |
120 | ||
b36d8391 | 121 | err = uas_submit_urbs(cmnd, cmnd->device->hostdata); |
61c09ce5 | 122 | if (!err) |
efefecf3 | 123 | cmdinfo->state &= ~IS_IN_WORK_LIST; |
61c09ce5 | 124 | else |
f6cc6093 | 125 | queue_work(workqueue, &devinfo->work); |
115bb1ff | 126 | } |
b7b5d11f | 127 | out: |
4c456971 GH |
128 | spin_unlock_irqrestore(&devinfo->lock, flags); |
129 | } | |
130 | ||
3e99862c EH |
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 | ||
5dfcf1ad | 142 | static void uas_add_work(struct scsi_cmnd *cmnd) |
1bf8198e | 143 | { |
5dfcf1ad | 144 | struct uas_cmd_info *cmdinfo = scsi_cmd_priv(cmnd); |
1bf8198e GH |
145 | struct uas_dev_info *devinfo = cmnd->device->hostdata; |
146 | ||
ab945eff | 147 | lockdep_assert_held(&devinfo->lock); |
1bf8198e | 148 | cmdinfo->state |= IS_IN_WORK_LIST; |
f6cc6093 | 149 | queue_work(workqueue, &devinfo->work); |
1bf8198e GH |
150 | } |
151 | ||
1589349f | 152 | static void uas_zap_pending(struct uas_dev_info *devinfo, int result) |
326349f8 GH |
153 | { |
154 | struct uas_cmd_info *cmdinfo; | |
43cd99cb | 155 | struct scsi_cmnd *cmnd; |
326349f8 | 156 | unsigned long flags; |
43cd99cb | 157 | int i, err; |
326349f8 GH |
158 | |
159 | spin_lock_irqsave(&devinfo->lock, flags); | |
43cd99cb HG |
160 | for (i = 0; i < devinfo->qdepth; i++) { |
161 | if (!devinfo->cmnd[i]) | |
162 | continue; | |
163 | ||
164 | cmnd = devinfo->cmnd[i]; | |
5dfcf1ad | 165 | cmdinfo = scsi_cmd_priv(cmnd); |
1ad7ed5a | 166 | uas_log_cmd_state(cmnd, __func__, 0); |
9c15c573 HG |
167 | /* Sense urbs were killed, clear COMMAND_INFLIGHT manually */ |
168 | cmdinfo->state &= ~COMMAND_INFLIGHT; | |
1589349f | 169 | cmnd->result = result << 16; |
9c15c573 HG |
170 | err = uas_try_complete(cmnd, __func__); |
171 | WARN_ON(err != 0); | |
326349f8 GH |
172 | } |
173 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
174 | } | |
175 | ||
115bb1ff MW |
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; | |
115bb1ff MW |
197 | } |
198 | ||
1ad7ed5a HG |
199 | static void uas_log_cmd_state(struct scsi_cmnd *cmnd, const char *prefix, |
200 | int status) | |
b1d67693 | 201 | { |
5dfcf1ad | 202 | struct uas_cmd_info *ci = scsi_cmd_priv(cmnd); |
b1d67693 | 203 | |
5963dec9 ON |
204 | if (status == -ENODEV) /* too late */ |
205 | return; | |
206 | ||
60d9f67d | 207 | scmd_printk(KERN_INFO, cmnd, |
e28e2f2f | 208 | "%s %d uas-tag %d inflight:%s%s%s%s%s%s%s%s%s%s%s%s ", |
5dfcf1ad | 209 | prefix, status, ci->uas_tag, |
b1d67693 GH |
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" : "", | |
b06e48af | 220 | (ci->state & COMMAND_ABORTED) ? " abort" : "", |
efefecf3 | 221 | (ci->state & IS_IN_WORK_LIST) ? " work" : ""); |
6dcd8ec2 | 222 | scsi_print_command(cmnd); |
b1d67693 GH |
223 | } |
224 | ||
4c5481ef HG |
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 | ||
5dfcf1ad | 232 | cmdinfo = scsi_cmd_priv(cmnd); |
4c5481ef HG |
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); | |
b1d67693 GH |
242 | } |
243 | ||
244 | static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller) | |
245 | { | |
5dfcf1ad | 246 | struct uas_cmd_info *cmdinfo = scsi_cmd_priv(cmnd); |
e0648520 | 247 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
b1d67693 | 248 | |
ab945eff | 249 | lockdep_assert_held(&devinfo->lock); |
b1d67693 GH |
250 | if (cmdinfo->state & (COMMAND_INFLIGHT | |
251 | DATA_IN_URB_INFLIGHT | | |
b06e48af | 252 | DATA_OUT_URB_INFLIGHT | |
616f0e6c | 253 | COMMAND_ABORTED)) |
b1d67693 | 254 | return -EBUSY; |
e28e2f2f | 255 | devinfo->cmnd[cmdinfo->uas_tag - 1] = NULL; |
4c5481ef | 256 | uas_free_unsubmitted_urbs(cmnd); |
46c97948 | 257 | scsi_done(cmnd); |
b1d67693 | 258 | return 0; |
115bb1ff MW |
259 | } |
260 | ||
261 | static void uas_xfer_data(struct urb *urb, struct scsi_cmnd *cmnd, | |
b1d67693 | 262 | unsigned direction) |
115bb1ff | 263 | { |
5dfcf1ad | 264 | struct uas_cmd_info *cmdinfo = scsi_cmd_priv(cmnd); |
115bb1ff MW |
265 | int err; |
266 | ||
b1d67693 | 267 | cmdinfo->state |= direction | SUBMIT_STATUS_URB; |
b36d8391 | 268 | err = uas_submit_urbs(cmnd, cmnd->device->hostdata); |
115bb1ff | 269 | if (err) { |
5dfcf1ad | 270 | uas_add_work(cmnd); |
115bb1ff MW |
271 | } |
272 | } | |
273 | ||
aa742683 ON |
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: | |
8036a7e7 | 280 | set_host_byte(cmnd, DID_BAD_TARGET); |
aa742683 ON |
281 | break; |
282 | case RC_TMF_SUCCEEDED: | |
8036a7e7 | 283 | set_host_byte(cmnd, DID_OK); |
aa742683 ON |
284 | break; |
285 | case RC_TMF_NOT_SUPPORTED: | |
f1d0d5c9 | 286 | set_host_byte(cmnd, DID_BAD_TARGET); |
aa742683 ON |
287 | break; |
288 | default: | |
289 | uas_log_cmd_state(cmnd, "response iu", response_code); | |
8036a7e7 | 290 | set_host_byte(cmnd, DID_ERROR); |
aa742683 ON |
291 | break; |
292 | } | |
293 | ||
294 | return response_code == RC_TMF_SUCCEEDED; | |
295 | } | |
296 | ||
115bb1ff MW |
297 | static void uas_stat_cmplt(struct urb *urb) |
298 | { | |
299 | struct iu *iu = urb->transfer_buffer; | |
22188f4a | 300 | struct Scsi_Host *shost = urb->context; |
21fc05b6 | 301 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
60d9f67d HG |
302 | struct urb *data_in_urb = NULL; |
303 | struct urb *data_out_urb = NULL; | |
115bb1ff | 304 | struct scsi_cmnd *cmnd; |
b1d67693 | 305 | struct uas_cmd_info *cmdinfo; |
e0648520 | 306 | unsigned long flags; |
5e61aede | 307 | unsigned int idx; |
cca26be3 | 308 | int status = urb->status; |
aa742683 | 309 | bool success; |
115bb1ff | 310 | |
b7b5d11f HG |
311 | spin_lock_irqsave(&devinfo->lock, flags); |
312 | ||
313 | if (devinfo->resetting) | |
314 | goto out; | |
115bb1ff | 315 | |
cca26be3 ON |
316 | if (status) { |
317 | if (status != -ENOENT && status != -ECONNRESET && status != -ESHUTDOWN) | |
318 | dev_err(&urb->dev->dev, "stat urb: status %d\n", status); | |
b7b5d11f | 319 | goto out; |
115bb1ff MW |
320 | } |
321 | ||
5e61aede HG |
322 | idx = be16_to_cpup(&iu->tag) - 1; |
323 | if (idx >= MAX_CMNDS || !devinfo->cmnd[idx]) { | |
324 | dev_err(&urb->dev->dev, | |
e28e2f2f | 325 | "stat urb: no pending cmd for uas-tag %d\n", idx + 1); |
b7b5d11f | 326 | goto out; |
023b515e GH |
327 | } |
328 | ||
5e61aede | 329 | cmnd = devinfo->cmnd[idx]; |
5dfcf1ad | 330 | cmdinfo = scsi_cmd_priv(cmnd); |
d89da03a HG |
331 | |
332 | if (!(cmdinfo->state & COMMAND_INFLIGHT)) { | |
1ad7ed5a | 333 | uas_log_cmd_state(cmnd, "unexpected status cmplt", 0); |
d89da03a | 334 | goto out; |
96c1eb98 | 335 | } |
115bb1ff MW |
336 | |
337 | switch (iu->iu_id) { | |
338 | case IU_ID_STATUS: | |
5ad22cfc | 339 | uas_sense(urb, cmnd); |
8aac863e GH |
340 | if (cmnd->result != 0) { |
341 | /* cancel data transfers on error */ | |
60d9f67d HG |
342 | data_in_urb = usb_get_urb(cmdinfo->data_in_urb); |
343 | data_out_urb = usb_get_urb(cmdinfo->data_out_urb); | |
8aac863e | 344 | } |
b1d67693 GH |
345 | cmdinfo->state &= ~COMMAND_INFLIGHT; |
346 | uas_try_complete(cmnd, __func__); | |
115bb1ff MW |
347 | break; |
348 | case IU_ID_READ_READY: | |
8e453155 HG |
349 | if (!cmdinfo->data_in_urb || |
350 | (cmdinfo->state & DATA_IN_URB_INFLIGHT)) { | |
1ad7ed5a | 351 | uas_log_cmd_state(cmnd, "unexpected read rdy", 0); |
8e453155 HG |
352 | break; |
353 | } | |
115bb1ff MW |
354 | uas_xfer_data(urb, cmnd, SUBMIT_DATA_IN_URB); |
355 | break; | |
356 | case IU_ID_WRITE_READY: | |
8e453155 HG |
357 | if (!cmdinfo->data_out_urb || |
358 | (cmdinfo->state & DATA_OUT_URB_INFLIGHT)) { | |
1ad7ed5a | 359 | uas_log_cmd_state(cmnd, "unexpected write rdy", 0); |
8e453155 HG |
360 | break; |
361 | } | |
115bb1ff MW |
362 | uas_xfer_data(urb, cmnd, SUBMIT_DATA_OUT_URB); |
363 | break; | |
fac1f485 | 364 | case IU_ID_RESPONSE: |
fac1f485 | 365 | cmdinfo->state &= ~COMMAND_INFLIGHT; |
aa742683 ON |
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 | } | |
fac1f485 HG |
372 | uas_try_complete(cmnd, __func__); |
373 | break; | |
115bb1ff | 374 | default: |
1ad7ed5a | 375 | uas_log_cmd_state(cmnd, "bogus IU", iu->iu_id); |
115bb1ff | 376 | } |
b7b5d11f | 377 | out: |
e9bd7e1a | 378 | usb_free_urb(urb); |
e0648520 | 379 | spin_unlock_irqrestore(&devinfo->lock, flags); |
60d9f67d HG |
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 | } | |
115bb1ff MW |
390 | } |
391 | ||
c621a81e | 392 | static void uas_data_cmplt(struct urb *urb) |
115bb1ff | 393 | { |
b1d67693 | 394 | struct scsi_cmnd *cmnd = urb->context; |
5dfcf1ad | 395 | struct uas_cmd_info *cmdinfo = scsi_cmd_priv(cmnd); |
e0648520 | 396 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
ae3d56d8 | 397 | struct scsi_data_buffer *sdb = &cmnd->sdb; |
e0648520 | 398 | unsigned long flags; |
cca26be3 | 399 | int status = urb->status; |
b1d67693 | 400 | |
e0648520 | 401 | spin_lock_irqsave(&devinfo->lock, flags); |
b7b5d11f | 402 | |
b1d67693 | 403 | if (cmdinfo->data_in_urb == urb) { |
b1d67693 | 404 | cmdinfo->state &= ~DATA_IN_URB_INFLIGHT; |
85fea825 | 405 | cmdinfo->data_in_urb = NULL; |
b1d67693 | 406 | } else if (cmdinfo->data_out_urb == urb) { |
b1d67693 | 407 | cmdinfo->state &= ~DATA_OUT_URB_INFLIGHT; |
85fea825 | 408 | cmdinfo->data_out_urb = NULL; |
b1d67693 | 409 | } |
b7b5d11f HG |
410 | |
411 | if (devinfo->resetting) | |
412 | goto out; | |
413 | ||
d89da03a HG |
414 | /* Data urbs should not complete before the cmd urb is submitted */ |
415 | if (cmdinfo->state & SUBMIT_CMD_URB) { | |
1ad7ed5a | 416 | uas_log_cmd_state(cmnd, "unexpected data cmplt", 0); |
d89da03a HG |
417 | goto out; |
418 | } | |
419 | ||
cca26be3 ON |
420 | if (status) { |
421 | if (status != -ENOENT && status != -ECONNRESET && status != -ESHUTDOWN) | |
422 | uas_log_cmd_state(cmnd, "data cmplt err", status); | |
8aac863e | 423 | /* error: no data transfered */ |
229531be | 424 | scsi_set_resid(cmnd, sdb->length); |
8aac863e | 425 | } else { |
229531be | 426 | scsi_set_resid(cmnd, sdb->length - urb->actual_length); |
8aac863e | 427 | } |
b1d67693 | 428 | uas_try_complete(cmnd, __func__); |
b7b5d11f | 429 | out: |
85fea825 | 430 | usb_free_urb(urb); |
e0648520 | 431 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
432 | } |
433 | ||
876285cc HG |
434 | static void uas_cmd_cmplt(struct urb *urb) |
435 | { | |
b6823c51 HG |
436 | if (urb->status) |
437 | dev_err(&urb->dev->dev, "cmd cmplt err %d\n", urb->status); | |
876285cc | 438 | |
876285cc HG |
439 | usb_free_urb(urb); |
440 | } | |
441 | ||
115bb1ff | 442 | static struct urb *uas_alloc_data_urb(struct uas_dev_info *devinfo, gfp_t gfp, |
b1d67693 GH |
443 | struct scsi_cmnd *cmnd, |
444 | enum dma_data_direction dir) | |
115bb1ff MW |
445 | { |
446 | struct usb_device *udev = devinfo->udev; | |
5dfcf1ad | 447 | struct uas_cmd_info *cmdinfo = scsi_cmd_priv(cmnd); |
115bb1ff | 448 | struct urb *urb = usb_alloc_urb(0, gfp); |
ae3d56d8 | 449 | struct scsi_data_buffer *sdb = &cmnd->sdb; |
2d75b9cb HG |
450 | unsigned int pipe = (dir == DMA_FROM_DEVICE) |
451 | ? devinfo->data_in_pipe : devinfo->data_out_pipe; | |
115bb1ff MW |
452 | |
453 | if (!urb) | |
454 | goto out; | |
b1d67693 GH |
455 | usb_fill_bulk_urb(urb, udev, pipe, NULL, sdb->length, |
456 | uas_data_cmplt, cmnd); | |
e28e2f2f HG |
457 | if (devinfo->use_streams) |
458 | urb->stream_id = cmdinfo->uas_tag; | |
115bb1ff MW |
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, | |
2d75b9cb | 466 | struct scsi_cmnd *cmnd) |
115bb1ff MW |
467 | { |
468 | struct usb_device *udev = devinfo->udev; | |
5dfcf1ad | 469 | struct uas_cmd_info *cmdinfo = scsi_cmd_priv(cmnd); |
115bb1ff MW |
470 | struct urb *urb = usb_alloc_urb(0, gfp); |
471 | struct sense_iu *iu; | |
472 | ||
473 | if (!urb) | |
474 | goto out; | |
475 | ||
ac563cfd | 476 | iu = kzalloc(sizeof(*iu), gfp); |
115bb1ff MW |
477 | if (!iu) |
478 | goto free; | |
479 | ||
480 | usb_fill_bulk_urb(urb, udev, devinfo->status_pipe, iu, sizeof(*iu), | |
2d75b9cb | 481 | uas_stat_cmplt, cmnd->device->host); |
e28e2f2f HG |
482 | if (devinfo->use_streams) |
483 | urb->stream_id = cmdinfo->uas_tag; | |
115bb1ff MW |
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, | |
a887cd36 | 493 | struct scsi_cmnd *cmnd) |
115bb1ff MW |
494 | { |
495 | struct usb_device *udev = devinfo->udev; | |
496 | struct scsi_device *sdev = cmnd->device; | |
5dfcf1ad | 497 | struct uas_cmd_info *cmdinfo = scsi_cmd_priv(cmnd); |
115bb1ff MW |
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); | |
ac563cfd | 509 | iu = kzalloc(sizeof(*iu) + len, gfp); |
115bb1ff MW |
510 | if (!iu) |
511 | goto free; | |
512 | ||
513 | iu->iu_id = IU_ID_COMMAND; | |
e28e2f2f | 514 | iu->tag = cpu_to_be16(cmdinfo->uas_tag); |
02e031cb | 515 | iu->prio_attr = UAS_SIMPLE_TAG; |
115bb1ff MW |
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, | |
b6823c51 | 521 | uas_cmd_cmplt, NULL); |
115bb1ff MW |
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 | ||
cd5432c7 | 536 | static int uas_submit_sense_urb(struct scsi_cmnd *cmnd, gfp_t gfp) |
115bb1ff | 537 | { |
2d75b9cb | 538 | struct uas_dev_info *devinfo = cmnd->device->hostdata; |
e9bd7e1a | 539 | struct urb *urb; |
876285cc | 540 | int err; |
115bb1ff | 541 | |
2d75b9cb | 542 | urb = uas_alloc_sense_urb(devinfo, gfp, cmnd); |
e9bd7e1a | 543 | if (!urb) |
cd5432c7 | 544 | return -ENOMEM; |
d5f808d3 | 545 | usb_anchor_urb(urb, &devinfo->sense_urbs); |
876285cc HG |
546 | err = usb_submit_urb(urb, gfp); |
547 | if (err) { | |
d5f808d3 | 548 | usb_unanchor_urb(urb); |
1ad7ed5a | 549 | uas_log_cmd_state(cmnd, "sense submit err", err); |
e9bd7e1a | 550 | usb_free_urb(urb); |
115bb1ff | 551 | } |
cd5432c7 | 552 | return err; |
e9bd7e1a GH |
553 | } |
554 | ||
555 | static int uas_submit_urbs(struct scsi_cmnd *cmnd, | |
b36d8391 | 556 | struct uas_dev_info *devinfo) |
e9bd7e1a | 557 | { |
5dfcf1ad | 558 | struct uas_cmd_info *cmdinfo = scsi_cmd_priv(cmnd); |
876285cc | 559 | int err; |
115bb1ff | 560 | |
ab945eff | 561 | lockdep_assert_held(&devinfo->lock); |
92a3f767 | 562 | if (cmdinfo->state & SUBMIT_STATUS_URB) { |
cd5432c7 WW |
563 | err = uas_submit_sense_urb(cmnd, GFP_ATOMIC); |
564 | if (err) | |
565 | return err; | |
92a3f767 | 566 | cmdinfo->state &= ~SUBMIT_STATUS_URB; |
115bb1ff MW |
567 | } |
568 | ||
569 | if (cmdinfo->state & ALLOC_DATA_IN_URB) { | |
b36d8391 | 570 | cmdinfo->data_in_urb = uas_alloc_data_urb(devinfo, GFP_ATOMIC, |
2d75b9cb | 571 | cmnd, DMA_FROM_DEVICE); |
115bb1ff | 572 | if (!cmdinfo->data_in_urb) |
cd5432c7 | 573 | return -ENOMEM; |
115bb1ff MW |
574 | cmdinfo->state &= ~ALLOC_DATA_IN_URB; |
575 | } | |
576 | ||
577 | if (cmdinfo->state & SUBMIT_DATA_IN_URB) { | |
d5f808d3 | 578 | usb_anchor_urb(cmdinfo->data_in_urb, &devinfo->data_urbs); |
b36d8391 | 579 | err = usb_submit_urb(cmdinfo->data_in_urb, GFP_ATOMIC); |
876285cc | 580 | if (err) { |
d5f808d3 | 581 | usb_unanchor_urb(cmdinfo->data_in_urb); |
1ad7ed5a | 582 | uas_log_cmd_state(cmnd, "data in submit err", err); |
cd5432c7 | 583 | return err; |
115bb1ff MW |
584 | } |
585 | cmdinfo->state &= ~SUBMIT_DATA_IN_URB; | |
b1d67693 | 586 | cmdinfo->state |= DATA_IN_URB_INFLIGHT; |
115bb1ff MW |
587 | } |
588 | ||
589 | if (cmdinfo->state & ALLOC_DATA_OUT_URB) { | |
b36d8391 | 590 | cmdinfo->data_out_urb = uas_alloc_data_urb(devinfo, GFP_ATOMIC, |
2d75b9cb | 591 | cmnd, DMA_TO_DEVICE); |
115bb1ff | 592 | if (!cmdinfo->data_out_urb) |
cd5432c7 | 593 | return -ENOMEM; |
115bb1ff MW |
594 | cmdinfo->state &= ~ALLOC_DATA_OUT_URB; |
595 | } | |
596 | ||
597 | if (cmdinfo->state & SUBMIT_DATA_OUT_URB) { | |
d5f808d3 | 598 | usb_anchor_urb(cmdinfo->data_out_urb, &devinfo->data_urbs); |
b36d8391 | 599 | err = usb_submit_urb(cmdinfo->data_out_urb, GFP_ATOMIC); |
876285cc | 600 | if (err) { |
d5f808d3 | 601 | usb_unanchor_urb(cmdinfo->data_out_urb); |
1ad7ed5a | 602 | uas_log_cmd_state(cmnd, "data out submit err", err); |
cd5432c7 | 603 | return err; |
115bb1ff MW |
604 | } |
605 | cmdinfo->state &= ~SUBMIT_DATA_OUT_URB; | |
b1d67693 | 606 | cmdinfo->state |= DATA_OUT_URB_INFLIGHT; |
115bb1ff MW |
607 | } |
608 | ||
609 | if (cmdinfo->state & ALLOC_CMD_URB) { | |
b36d8391 | 610 | cmdinfo->cmd_urb = uas_alloc_cmd_urb(devinfo, GFP_ATOMIC, cmnd); |
115bb1ff | 611 | if (!cmdinfo->cmd_urb) |
cd5432c7 | 612 | return -ENOMEM; |
115bb1ff MW |
613 | cmdinfo->state &= ~ALLOC_CMD_URB; |
614 | } | |
615 | ||
616 | if (cmdinfo->state & SUBMIT_CMD_URB) { | |
d5f808d3 | 617 | usb_anchor_urb(cmdinfo->cmd_urb, &devinfo->cmd_urbs); |
b36d8391 | 618 | err = usb_submit_urb(cmdinfo->cmd_urb, GFP_ATOMIC); |
876285cc | 619 | if (err) { |
d5f808d3 | 620 | usb_unanchor_urb(cmdinfo->cmd_urb); |
1ad7ed5a | 621 | uas_log_cmd_state(cmnd, "cmd submit err", err); |
cd5432c7 | 622 | return err; |
115bb1ff | 623 | } |
a0e39e34 | 624 | cmdinfo->cmd_urb = NULL; |
115bb1ff | 625 | cmdinfo->state &= ~SUBMIT_CMD_URB; |
b1d67693 | 626 | cmdinfo->state |= COMMAND_INFLIGHT; |
115bb1ff MW |
627 | } |
628 | ||
629 | return 0; | |
630 | } | |
631 | ||
af049dfd | 632 | static int uas_queuecommand_lck(struct scsi_cmnd *cmnd) |
115bb1ff MW |
633 | { |
634 | struct scsi_device *sdev = cmnd->device; | |
635 | struct uas_dev_info *devinfo = sdev->hostdata; | |
5dfcf1ad | 636 | struct uas_cmd_info *cmdinfo = scsi_cmd_priv(cmnd); |
e0648520 | 637 | unsigned long flags; |
e28e2f2f | 638 | int idx, err; |
115bb1ff | 639 | |
f9dc024a HG |
640 | /* Re-check scsi_block_requests now that we've the host-lock */ |
641 | if (cmnd->device->host->host_self_blocked) | |
642 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
643 | ||
59307852 HG |
644 | if ((devinfo->flags & US_FL_NO_ATA_1X) && |
645 | (cmnd->cmnd[0] == ATA_12 || cmnd->cmnd[0] == ATA_16)) { | |
646 | memcpy(cmnd->sense_buffer, usb_stor_sense_invalidCDB, | |
647 | sizeof(usb_stor_sense_invalidCDB)); | |
648 | cmnd->result = SAM_STAT_CHECK_CONDITION; | |
46c97948 | 649 | scsi_done(cmnd); |
59307852 HG |
650 | return 0; |
651 | } | |
652 | ||
c6f63207 HG |
653 | spin_lock_irqsave(&devinfo->lock, flags); |
654 | ||
f8be6bfc | 655 | if (devinfo->resetting) { |
8036a7e7 | 656 | set_host_byte(cmnd, DID_ERROR); |
46c97948 | 657 | scsi_done(cmnd); |
eb2a86ae | 658 | goto zombie; |
f8be6bfc GH |
659 | } |
660 | ||
e28e2f2f HG |
661 | /* Find a free uas-tag */ |
662 | for (idx = 0; idx < devinfo->qdepth; idx++) { | |
663 | if (!devinfo->cmnd[idx]) | |
664 | break; | |
665 | } | |
666 | if (idx == devinfo->qdepth) { | |
e0648520 | 667 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff | 668 | return SCSI_MLQUEUE_DEVICE_BUSY; |
e0648520 | 669 | } |
115bb1ff | 670 | |
5e61aede | 671 | memset(cmdinfo, 0, sizeof(*cmdinfo)); |
e28e2f2f | 672 | cmdinfo->uas_tag = idx + 1; /* uas-tag == usb-stream-id, so 1 based */ |
e0620001 | 673 | cmdinfo->state = SUBMIT_STATUS_URB | ALLOC_CMD_URB | SUBMIT_CMD_URB; |
115bb1ff MW |
674 | |
675 | switch (cmnd->sc_data_direction) { | |
676 | case DMA_FROM_DEVICE: | |
677 | cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB; | |
678 | break; | |
679 | case DMA_BIDIRECTIONAL: | |
680 | cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB; | |
df561f66 | 681 | fallthrough; |
115bb1ff MW |
682 | case DMA_TO_DEVICE: |
683 | cmdinfo->state |= ALLOC_DATA_OUT_URB | SUBMIT_DATA_OUT_URB; | |
93c747ed | 684 | break; |
115bb1ff MW |
685 | case DMA_NONE: |
686 | break; | |
687 | } | |
688 | ||
e28e2f2f | 689 | if (!devinfo->use_streams) |
db32de11 | 690 | cmdinfo->state &= ~(SUBMIT_DATA_IN_URB | SUBMIT_DATA_OUT_URB); |
115bb1ff | 691 | |
b36d8391 | 692 | err = uas_submit_urbs(cmnd, devinfo); |
eb2a86ae ON |
693 | /* |
694 | * in case of fatal errors the SCSI layer is peculiar | |
695 | * a command that has finished is a success for the purpose | |
696 | * of queueing, no matter how fatal the error | |
697 | */ | |
698 | if (err == -ENODEV) { | |
cd5432c7 | 699 | set_host_byte(cmnd, DID_NO_CONNECT); |
46c97948 | 700 | scsi_done(cmnd); |
eb2a86ae ON |
701 | goto zombie; |
702 | } | |
115bb1ff MW |
703 | if (err) { |
704 | /* If we did nothing, give up now */ | |
92a3f767 | 705 | if (cmdinfo->state & SUBMIT_STATUS_URB) { |
e0648520 | 706 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
707 | return SCSI_MLQUEUE_DEVICE_BUSY; |
708 | } | |
5dfcf1ad | 709 | uas_add_work(cmnd); |
115bb1ff MW |
710 | } |
711 | ||
e28e2f2f | 712 | devinfo->cmnd[idx] = cmnd; |
eb2a86ae | 713 | zombie: |
e0648520 | 714 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
715 | return 0; |
716 | } | |
717 | ||
f281233d JG |
718 | static DEF_SCSI_QCMD(uas_queuecommand) |
719 | ||
616f0e6c HG |
720 | /* |
721 | * For now we do not support actually sending an abort to the device, so | |
722 | * this eh always fails. Still we must define it to make sure that we've | |
723 | * dropped all references to the cmnd in question once this function exits. | |
724 | */ | |
725 | static int uas_eh_abort_handler(struct scsi_cmnd *cmnd) | |
115bb1ff | 726 | { |
5dfcf1ad | 727 | struct uas_cmd_info *cmdinfo = scsi_cmd_priv(cmnd); |
616f0e6c HG |
728 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
729 | struct urb *data_in_urb = NULL; | |
730 | struct urb *data_out_urb = NULL; | |
e0648520 | 731 | unsigned long flags; |
115bb1ff | 732 | |
e0648520 | 733 | spin_lock_irqsave(&devinfo->lock, flags); |
b83b86a3 | 734 | |
1ad7ed5a | 735 | uas_log_cmd_state(cmnd, __func__, 0); |
c6f63207 | 736 | |
616f0e6c HG |
737 | /* Ensure that try_complete does not call scsi_done */ |
738 | cmdinfo->state |= COMMAND_ABORTED; | |
b83b86a3 | 739 | |
616f0e6c | 740 | /* Drop all refs to this cmnd, kill data urbs to break their ref */ |
e28e2f2f | 741 | devinfo->cmnd[cmdinfo->uas_tag - 1] = NULL; |
616f0e6c HG |
742 | if (cmdinfo->state & DATA_IN_URB_INFLIGHT) |
743 | data_in_urb = usb_get_urb(cmdinfo->data_in_urb); | |
744 | if (cmdinfo->state & DATA_OUT_URB_INFLIGHT) | |
745 | data_out_urb = usb_get_urb(cmdinfo->data_out_urb); | |
e0648520 | 746 | |
4c5481ef | 747 | uas_free_unsubmitted_urbs(cmnd); |
b83b86a3 | 748 | |
b83b86a3 HG |
749 | spin_unlock_irqrestore(&devinfo->lock, flags); |
750 | ||
616f0e6c HG |
751 | if (data_in_urb) { |
752 | usb_kill_urb(data_in_urb); | |
753 | usb_put_urb(data_in_urb); | |
c6f63207 | 754 | } |
616f0e6c HG |
755 | if (data_out_urb) { |
756 | usb_kill_urb(data_out_urb); | |
757 | usb_put_urb(data_out_urb); | |
5d390403 | 758 | } |
115bb1ff | 759 | |
616f0e6c | 760 | return FAILED; |
115bb1ff MW |
761 | } |
762 | ||
e13849b7 | 763 | static int uas_eh_device_reset_handler(struct scsi_cmnd *cmnd) |
115bb1ff MW |
764 | { |
765 | struct scsi_device *sdev = cmnd->device; | |
766 | struct uas_dev_info *devinfo = sdev->hostdata; | |
767 | struct usb_device *udev = devinfo->udev; | |
b7b5d11f | 768 | unsigned long flags; |
023b515e | 769 | int err; |
115bb1ff | 770 | |
be326f4c HG |
771 | err = usb_lock_device_for_reset(udev, devinfo->intf); |
772 | if (err) { | |
773 | shost_printk(KERN_ERR, sdev->host, | |
774 | "%s FAILED to get lock err %d\n", __func__, err); | |
775 | return FAILED; | |
776 | } | |
777 | ||
326349f8 | 778 | shost_printk(KERN_INFO, sdev->host, "%s start\n", __func__); |
b7b5d11f HG |
779 | |
780 | spin_lock_irqsave(&devinfo->lock, flags); | |
023b515e | 781 | devinfo->resetting = 1; |
b7b5d11f HG |
782 | spin_unlock_irqrestore(&devinfo->lock, flags); |
783 | ||
a0e39e34 | 784 | usb_kill_anchored_urbs(&devinfo->cmd_urbs); |
023b515e GH |
785 | usb_kill_anchored_urbs(&devinfo->sense_urbs); |
786 | usb_kill_anchored_urbs(&devinfo->data_urbs); | |
1589349f HG |
787 | uas_zap_pending(devinfo, DID_RESET); |
788 | ||
023b515e | 789 | err = usb_reset_device(udev); |
b7b5d11f HG |
790 | |
791 | spin_lock_irqsave(&devinfo->lock, flags); | |
023b515e | 792 | devinfo->resetting = 0; |
b7b5d11f | 793 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff | 794 | |
be326f4c HG |
795 | usb_unlock_device(udev); |
796 | ||
023b515e | 797 | if (err) { |
ce39fe6f HG |
798 | shost_printk(KERN_INFO, sdev->host, "%s FAILED err %d\n", |
799 | __func__, err); | |
023b515e GH |
800 | return FAILED; |
801 | } | |
115bb1ff | 802 | |
023b515e GH |
803 | shost_printk(KERN_INFO, sdev->host, "%s success\n", __func__); |
804 | return SUCCESS; | |
115bb1ff MW |
805 | } |
806 | ||
13630746 HG |
807 | static int uas_target_alloc(struct scsi_target *starget) |
808 | { | |
809 | struct uas_dev_info *devinfo = (struct uas_dev_info *) | |
810 | dev_to_shost(starget->dev.parent)->hostdata; | |
811 | ||
812 | if (devinfo->flags & US_FL_NO_REPORT_LUNS) | |
813 | starget->no_report_luns = 1; | |
814 | ||
815 | return 0; | |
816 | } | |
817 | ||
115bb1ff MW |
818 | static int uas_slave_alloc(struct scsi_device *sdev) |
819 | { | |
ee136af4 HG |
820 | struct uas_dev_info *devinfo = |
821 | (struct uas_dev_info *)sdev->host->hostdata; | |
822 | ||
823 | sdev->hostdata = devinfo; | |
37599f96 | 824 | |
3ae62a42 ON |
825 | /* |
826 | * The protocol has no requirements on alignment in the strict sense. | |
827 | * Controllers may or may not have alignment restrictions. | |
828 | * As this is not exported, we use an extremely conservative guess. | |
37599f96 HG |
829 | */ |
830 | blk_queue_update_dma_alignment(sdev->request_queue, (512 - 1)); | |
831 | ||
d5c65d32 GKH |
832 | if (devinfo->flags & US_FL_MAX_SECTORS_64) |
833 | blk_queue_max_hw_sectors(sdev->request_queue, 64); | |
834 | else if (devinfo->flags & US_FL_MAX_SECTORS_240) | |
835 | blk_queue_max_hw_sectors(sdev->request_queue, 240); | |
836 | ||
115bb1ff MW |
837 | return 0; |
838 | } | |
839 | ||
840 | static int uas_slave_configure(struct scsi_device *sdev) | |
841 | { | |
842 | struct uas_dev_info *devinfo = sdev->hostdata; | |
734016b0 HG |
843 | |
844 | if (devinfo->flags & US_FL_NO_REPORT_OPCODES) | |
845 | sdev->no_report_opcodes = 1; | |
846 | ||
9fa62b1a DK |
847 | /* A few buggy USB-ATA bridges don't understand FUA */ |
848 | if (devinfo->flags & US_FL_BROKEN_FUA) | |
849 | sdev->broken_fua = 1; | |
850 | ||
8c4e97dd AK |
851 | /* UAS also needs to support FL_ALWAYS_SYNC */ |
852 | if (devinfo->flags & US_FL_ALWAYS_SYNC) { | |
853 | sdev->skip_ms_page_3f = 1; | |
854 | sdev->skip_ms_page_8 = 1; | |
855 | sdev->wce_default_on = 1; | |
856 | } | |
42d1c6d4 | 857 | |
bff000ca ON |
858 | /* Some disks cannot handle READ_CAPACITY_16 */ |
859 | if (devinfo->flags & US_FL_NO_READ_CAPACITY_16) | |
860 | sdev->no_read_capacity_16 = 1; | |
861 | ||
8010622c ON |
862 | /* Some disks cannot handle WRITE_SAME */ |
863 | if (devinfo->flags & US_FL_NO_SAME) | |
864 | sdev->no_write_same = 1; | |
42d1c6d4 ON |
865 | /* |
866 | * Some disks return the total number of blocks in response | |
867 | * to READ CAPACITY rather than the highest block number. | |
868 | * If this device makes that mistake, tell the sd driver. | |
869 | */ | |
870 | if (devinfo->flags & US_FL_FIX_CAPACITY) | |
871 | sdev->fix_capacity = 1; | |
872 | ||
335cbbd5 ON |
873 | /* |
874 | * in some cases we have to guess | |
875 | */ | |
876 | if (devinfo->flags & US_FL_CAPACITY_HEURISTICS) | |
877 | sdev->guess_capacity = 1; | |
878 | ||
321da3dc MP |
879 | /* |
880 | * Some devices report generic values until the media has been | |
881 | * accessed. Force a READ(10) prior to querying device | |
882 | * characteristics. | |
883 | */ | |
884 | sdev->read_before_ms = 1; | |
885 | ||
42d1c6d4 ON |
886 | /* |
887 | * Some devices don't like MODE SENSE with page=0x3f, | |
888 | * which is the command used for checking if a device | |
889 | * is write-protected. Now that we tell the sd driver | |
890 | * to do a 192-byte transfer with this command the | |
891 | * majority of devices work fine, but a few still can't | |
892 | * handle it. The sd driver will simply assume those | |
893 | * devices are write-enabled. | |
894 | */ | |
895 | if (devinfo->flags & US_FL_NO_WP_DETECT) | |
896 | sdev->skip_ms_page_3f = 1; | |
897 | ||
593224ea | 898 | scsi_change_queue_depth(sdev, devinfo->qdepth - 2); |
115bb1ff MW |
899 | return 0; |
900 | } | |
901 | ||
04d1fa43 | 902 | static const struct scsi_host_template uas_host_template = { |
115bb1ff MW |
903 | .module = THIS_MODULE, |
904 | .name = "uas", | |
905 | .queuecommand = uas_queuecommand, | |
13630746 | 906 | .target_alloc = uas_target_alloc, |
115bb1ff MW |
907 | .slave_alloc = uas_slave_alloc, |
908 | .slave_configure = uas_slave_configure, | |
909 | .eh_abort_handler = uas_eh_abort_handler, | |
e13849b7 | 910 | .eh_device_reset_handler = uas_eh_device_reset_handler, |
115bb1ff | 911 | .this_id = -1, |
115bb1ff | 912 | .skip_settle_delay = 1, |
4af14d11 | 913 | .dma_boundary = PAGE_SIZE - 1, |
5dfcf1ad | 914 | .cmd_size = sizeof(struct uas_cmd_info), |
115bb1ff MW |
915 | }; |
916 | ||
79b4c061 HG |
917 | #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \ |
918 | vendorName, productName, useProtocol, useTransport, \ | |
919 | initFunction, flags) \ | |
920 | { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \ | |
921 | .driver_info = (flags) } | |
922 | ||
115bb1ff | 923 | static struct usb_device_id uas_usb_ids[] = { |
79b4c061 | 924 | # include "unusual_uas.h" |
115bb1ff MW |
925 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_BULK) }, |
926 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_UAS) }, | |
115bb1ff MW |
927 | { } |
928 | }; | |
929 | MODULE_DEVICE_TABLE(usb, uas_usb_ids); | |
930 | ||
79b4c061 HG |
931 | #undef UNUSUAL_DEV |
932 | ||
e1be067b HG |
933 | static int uas_switch_interface(struct usb_device *udev, |
934 | struct usb_interface *intf) | |
935 | { | |
786de92b | 936 | struct usb_host_interface *alt; |
e1be067b HG |
937 | |
938 | alt = uas_find_uas_alt_setting(intf); | |
786de92b AS |
939 | if (!alt) |
940 | return -ENODEV; | |
e1be067b | 941 | |
786de92b AS |
942 | return usb_set_interface(udev, alt->desc.bInterfaceNumber, |
943 | alt->desc.bAlternateSetting); | |
e1be067b HG |
944 | } |
945 | ||
58d51444 | 946 | static int uas_configure_endpoints(struct uas_dev_info *devinfo) |
34f11e59 HG |
947 | { |
948 | struct usb_host_endpoint *eps[4] = { }; | |
949 | struct usb_device *udev = devinfo->udev; | |
950 | int r; | |
951 | ||
34f11e59 | 952 | r = uas_find_endpoints(devinfo->intf->cur_altsetting, eps); |
74d71aec HG |
953 | if (r) |
954 | return r; | |
955 | ||
956 | devinfo->cmd_pipe = usb_sndbulkpipe(udev, | |
957 | usb_endpoint_num(&eps[0]->desc)); | |
958 | devinfo->status_pipe = usb_rcvbulkpipe(udev, | |
959 | usb_endpoint_num(&eps[1]->desc)); | |
960 | devinfo->data_in_pipe = usb_rcvbulkpipe(udev, | |
961 | usb_endpoint_num(&eps[2]->desc)); | |
962 | devinfo->data_out_pipe = usb_sndbulkpipe(udev, | |
963 | usb_endpoint_num(&eps[3]->desc)); | |
115bb1ff | 964 | |
e5e55819 | 965 | if (udev->speed < USB_SPEED_SUPER) { |
e2875c33 | 966 | devinfo->qdepth = 32; |
115bb1ff MW |
967 | devinfo->use_streams = 0; |
968 | } else { | |
58d51444 | 969 | devinfo->qdepth = usb_alloc_streams(devinfo->intf, eps + 1, |
5e61aede | 970 | 3, MAX_CMNDS, GFP_NOIO); |
58d51444 HG |
971 | if (devinfo->qdepth < 0) |
972 | return devinfo->qdepth; | |
115bb1ff MW |
973 | devinfo->use_streams = 1; |
974 | } | |
58d51444 HG |
975 | |
976 | return 0; | |
115bb1ff MW |
977 | } |
978 | ||
dae51546 SAS |
979 | static void uas_free_streams(struct uas_dev_info *devinfo) |
980 | { | |
981 | struct usb_device *udev = devinfo->udev; | |
982 | struct usb_host_endpoint *eps[3]; | |
983 | ||
984 | eps[0] = usb_pipe_endpoint(udev, devinfo->status_pipe); | |
985 | eps[1] = usb_pipe_endpoint(udev, devinfo->data_in_pipe); | |
986 | eps[2] = usb_pipe_endpoint(udev, devinfo->data_out_pipe); | |
94d72f00 | 987 | usb_free_streams(devinfo->intf, eps, 3, GFP_NOIO); |
dae51546 SAS |
988 | } |
989 | ||
115bb1ff MW |
990 | static int uas_probe(struct usb_interface *intf, const struct usb_device_id *id) |
991 | { | |
6ce8213b HG |
992 | int result = -ENOMEM; |
993 | struct Scsi_Host *shost = NULL; | |
115bb1ff MW |
994 | struct uas_dev_info *devinfo; |
995 | struct usb_device *udev = interface_to_usbdev(intf); | |
d181b34b | 996 | u64 dev_flags; |
115bb1ff | 997 | |
a5011d44 | 998 | if (!uas_use_uas_driver(intf, id, &dev_flags)) |
79b4c061 HG |
999 | return -ENODEV; |
1000 | ||
89dc2905 MW |
1001 | if (uas_switch_interface(udev, intf)) |
1002 | return -ENODEV; | |
115bb1ff | 1003 | |
21fc05b6 HG |
1004 | shost = scsi_host_alloc(&uas_host_template, |
1005 | sizeof(struct uas_dev_info)); | |
115bb1ff | 1006 | if (!shost) |
6ce8213b | 1007 | goto set_alt0; |
115bb1ff MW |
1008 | |
1009 | shost->max_cmd_len = 16 + 252; | |
1010 | shost->max_id = 1; | |
bde027b4 GH |
1011 | shost->max_lun = 256; |
1012 | shost->max_channel = 0; | |
115bb1ff MW |
1013 | shost->sg_tablesize = udev->bus->sg_tablesize; |
1014 | ||
21fc05b6 | 1015 | devinfo = (struct uas_dev_info *)shost->hostdata; |
115bb1ff MW |
1016 | devinfo->intf = intf; |
1017 | devinfo->udev = udev; | |
023b515e | 1018 | devinfo->resetting = 0; |
da65c2bb | 1019 | devinfo->shutdown = 0; |
a5011d44 | 1020 | devinfo->flags = dev_flags; |
a0e39e34 | 1021 | init_usb_anchor(&devinfo->cmd_urbs); |
bdd000fb GH |
1022 | init_usb_anchor(&devinfo->sense_urbs); |
1023 | init_usb_anchor(&devinfo->data_urbs); | |
e0648520 | 1024 | spin_lock_init(&devinfo->lock); |
1bf8198e | 1025 | INIT_WORK(&devinfo->work, uas_do_work); |
3e99862c | 1026 | INIT_WORK(&devinfo->scan_work, uas_scan_work); |
58d51444 HG |
1027 | |
1028 | result = uas_configure_endpoints(devinfo); | |
1029 | if (result) | |
1030 | goto set_alt0; | |
115bb1ff | 1031 | |
198de51d HG |
1032 | /* |
1033 | * 1 tag is reserved for untagged commands + | |
1034 | * 1 tag to avoid off by one errors in some bridge firmwares | |
1035 | */ | |
1036 | shost->can_queue = devinfo->qdepth - 2; | |
1037 | ||
c637f1fa | 1038 | usb_set_intfdata(intf, shost); |
d5c65d32 | 1039 | result = scsi_add_host(shost, &intf->dev); |
dae51546 | 1040 | if (result) |
6ce8213b | 1041 | goto free_streams; |
dae51546 | 1042 | |
3e99862c EH |
1043 | /* Submit the delayed_work for SCSI-device scanning */ |
1044 | schedule_work(&devinfo->scan_work); | |
1045 | ||
115bb1ff | 1046 | return result; |
dae51546 | 1047 | |
6ce8213b | 1048 | free_streams: |
dae51546 | 1049 | uas_free_streams(devinfo); |
c637f1fa | 1050 | usb_set_intfdata(intf, NULL); |
6ce8213b HG |
1051 | set_alt0: |
1052 | usb_set_interface(udev, intf->altsetting[0].desc.bInterfaceNumber, 0); | |
115bb1ff MW |
1053 | if (shost) |
1054 | scsi_host_put(shost); | |
1055 | return result; | |
1056 | } | |
1057 | ||
f9dc024a HG |
1058 | static int uas_cmnd_list_empty(struct uas_dev_info *devinfo) |
1059 | { | |
1060 | unsigned long flags; | |
1061 | int i, r = 1; | |
1062 | ||
1063 | spin_lock_irqsave(&devinfo->lock, flags); | |
1064 | ||
1065 | for (i = 0; i < devinfo->qdepth; i++) { | |
1066 | if (devinfo->cmnd[i]) { | |
1067 | r = 0; /* Not empty */ | |
1068 | break; | |
1069 | } | |
1070 | } | |
1071 | ||
1072 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
1073 | ||
1074 | return r; | |
1075 | } | |
1076 | ||
1077 | /* | |
1078 | * Wait for any pending cmnds to complete, on usb-2 sense_urbs may temporarily | |
1079 | * get empty while there still is more work to do due to sense-urbs completing | |
1080 | * with a READ/WRITE_READY iu code, so keep waiting until the list gets empty. | |
1081 | */ | |
1082 | static int uas_wait_for_pending_cmnds(struct uas_dev_info *devinfo) | |
1083 | { | |
1084 | unsigned long start_time; | |
1085 | int r; | |
1086 | ||
1087 | start_time = jiffies; | |
1088 | do { | |
1089 | flush_work(&devinfo->work); | |
1090 | ||
1091 | r = usb_wait_anchor_empty_timeout(&devinfo->sense_urbs, 5000); | |
1092 | if (r == 0) | |
1093 | return -ETIME; | |
1094 | ||
1095 | r = usb_wait_anchor_empty_timeout(&devinfo->data_urbs, 500); | |
1096 | if (r == 0) | |
1097 | return -ETIME; | |
1098 | ||
1099 | if (time_after(jiffies, start_time + 5 * HZ)) | |
1100 | return -ETIME; | |
1101 | } while (!uas_cmnd_list_empty(devinfo)); | |
1102 | ||
1103 | return 0; | |
1104 | } | |
1105 | ||
115bb1ff MW |
1106 | static int uas_pre_reset(struct usb_interface *intf) |
1107 | { | |
4de7a373 | 1108 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
21fc05b6 | 1109 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
4de7a373 HG |
1110 | unsigned long flags; |
1111 | ||
da65c2bb HG |
1112 | if (devinfo->shutdown) |
1113 | return 0; | |
1114 | ||
4de7a373 HG |
1115 | /* Block new requests */ |
1116 | spin_lock_irqsave(shost->host_lock, flags); | |
1117 | scsi_block_requests(shost); | |
1118 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1119 | ||
f9dc024a | 1120 | if (uas_wait_for_pending_cmnds(devinfo) != 0) { |
4de7a373 | 1121 | shost_printk(KERN_ERR, shost, "%s: timed out\n", __func__); |
f9dc024a | 1122 | scsi_unblock_requests(shost); |
4de7a373 HG |
1123 | return 1; |
1124 | } | |
1125 | ||
1126 | uas_free_streams(devinfo); | |
1127 | ||
115bb1ff MW |
1128 | return 0; |
1129 | } | |
1130 | ||
1131 | static int uas_post_reset(struct usb_interface *intf) | |
1132 | { | |
4de7a373 | 1133 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
21fc05b6 | 1134 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
4de7a373 | 1135 | unsigned long flags; |
ce39fe6f | 1136 | int err; |
4de7a373 | 1137 | |
da65c2bb HG |
1138 | if (devinfo->shutdown) |
1139 | return 0; | |
1140 | ||
ce39fe6f | 1141 | err = uas_configure_endpoints(devinfo); |
9a513c90 | 1142 | if (err && err != -ENODEV) |
58d51444 | 1143 | shost_printk(KERN_ERR, shost, |
ce39fe6f HG |
1144 | "%s: alloc streams error %d after reset", |
1145 | __func__, err); | |
4de7a373 | 1146 | |
cbeef22f | 1147 | /* we must unblock the host in every case lest we deadlock */ |
4de7a373 HG |
1148 | spin_lock_irqsave(shost->host_lock, flags); |
1149 | scsi_report_bus_reset(shost, 0); | |
1150 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1151 | ||
1152 | scsi_unblock_requests(shost); | |
1153 | ||
cbeef22f | 1154 | return err ? 1 : 0; |
115bb1ff MW |
1155 | } |
1156 | ||
0df1f663 HG |
1157 | static int uas_suspend(struct usb_interface *intf, pm_message_t message) |
1158 | { | |
1159 | struct Scsi_Host *shost = usb_get_intfdata(intf); | |
21fc05b6 | 1160 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
0df1f663 | 1161 | |
f9dc024a | 1162 | if (uas_wait_for_pending_cmnds(devinfo) != 0) { |
0df1f663 HG |
1163 | shost_printk(KERN_ERR, shost, "%s: timed out\n", __func__); |
1164 | return -ETIME; | |
1165 | } | |
1166 | ||
1167 | return 0; | |
1168 | } | |
1169 | ||
1170 | static int uas_resume(struct usb_interface *intf) | |
1171 | { | |
1172 | return 0; | |
1173 | } | |
1174 | ||
1175 | static int uas_reset_resume(struct usb_interface *intf) | |
1176 | { | |
1177 | struct Scsi_Host *shost = usb_get_intfdata(intf); | |
21fc05b6 | 1178 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
0df1f663 | 1179 | unsigned long flags; |
ce39fe6f | 1180 | int err; |
0df1f663 | 1181 | |
ce39fe6f HG |
1182 | err = uas_configure_endpoints(devinfo); |
1183 | if (err) { | |
0df1f663 | 1184 | shost_printk(KERN_ERR, shost, |
ce39fe6f HG |
1185 | "%s: alloc streams error %d after reset", |
1186 | __func__, err); | |
0df1f663 HG |
1187 | return -EIO; |
1188 | } | |
1189 | ||
1190 | spin_lock_irqsave(shost->host_lock, flags); | |
1191 | scsi_report_bus_reset(shost, 0); | |
1192 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1193 | ||
1194 | return 0; | |
1195 | } | |
1196 | ||
115bb1ff MW |
1197 | static void uas_disconnect(struct usb_interface *intf) |
1198 | { | |
115bb1ff | 1199 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
21fc05b6 | 1200 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
b7b5d11f | 1201 | unsigned long flags; |
115bb1ff | 1202 | |
b7b5d11f | 1203 | spin_lock_irqsave(&devinfo->lock, flags); |
4c456971 | 1204 | devinfo->resetting = 1; |
b7b5d11f HG |
1205 | spin_unlock_irqrestore(&devinfo->lock, flags); |
1206 | ||
1bf8198e | 1207 | cancel_work_sync(&devinfo->work); |
a0e39e34 | 1208 | usb_kill_anchored_urbs(&devinfo->cmd_urbs); |
bdd000fb GH |
1209 | usb_kill_anchored_urbs(&devinfo->sense_urbs); |
1210 | usb_kill_anchored_urbs(&devinfo->data_urbs); | |
1589349f HG |
1211 | uas_zap_pending(devinfo, DID_NO_CONNECT); |
1212 | ||
3e99862c EH |
1213 | /* |
1214 | * Prevent SCSI scanning (if it hasn't started yet) | |
1215 | * or wait for the SCSI-scanning routine to stop. | |
1216 | */ | |
1217 | cancel_work_sync(&devinfo->scan_work); | |
1218 | ||
4c456971 | 1219 | scsi_remove_host(shost); |
dae51546 | 1220 | uas_free_streams(devinfo); |
21fc05b6 | 1221 | scsi_host_put(shost); |
115bb1ff MW |
1222 | } |
1223 | ||
da65c2bb HG |
1224 | /* |
1225 | * Put the device back in usb-storage mode on shutdown, as some BIOS-es | |
1226 | * hang on reboot when the device is still in uas mode. Note the reset is | |
1227 | * necessary as some devices won't revert to usb-storage mode without it. | |
1228 | */ | |
1229 | static void uas_shutdown(struct device *dev) | |
1230 | { | |
1231 | struct usb_interface *intf = to_usb_interface(dev); | |
1232 | struct usb_device *udev = interface_to_usbdev(intf); | |
1233 | struct Scsi_Host *shost = usb_get_intfdata(intf); | |
21fc05b6 | 1234 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
da65c2bb HG |
1235 | |
1236 | if (system_state != SYSTEM_RESTART) | |
1237 | return; | |
1238 | ||
1239 | devinfo->shutdown = 1; | |
1240 | uas_free_streams(devinfo); | |
1241 | usb_set_interface(udev, intf->altsetting[0].desc.bInterfaceNumber, 0); | |
1242 | usb_reset_device(udev); | |
1243 | } | |
1244 | ||
115bb1ff MW |
1245 | static struct usb_driver uas_driver = { |
1246 | .name = "uas", | |
1247 | .probe = uas_probe, | |
1248 | .disconnect = uas_disconnect, | |
1249 | .pre_reset = uas_pre_reset, | |
1250 | .post_reset = uas_post_reset, | |
0df1f663 HG |
1251 | .suspend = uas_suspend, |
1252 | .resume = uas_resume, | |
1253 | .reset_resume = uas_reset_resume, | |
49a78b05 | 1254 | .driver.shutdown = uas_shutdown, |
115bb1ff MW |
1255 | .id_table = uas_usb_ids, |
1256 | }; | |
1257 | ||
f6cc6093 ON |
1258 | static int __init uas_init(void) |
1259 | { | |
1260 | int rv; | |
1261 | ||
1262 | workqueue = alloc_workqueue("uas", WQ_MEM_RECLAIM, 0); | |
1263 | if (!workqueue) | |
1264 | return -ENOMEM; | |
1265 | ||
1266 | rv = usb_register(&uas_driver); | |
1267 | if (rv) { | |
1268 | destroy_workqueue(workqueue); | |
1269 | return -ENOMEM; | |
1270 | } | |
1271 | ||
1272 | return 0; | |
1273 | } | |
1274 | ||
1275 | static void __exit uas_exit(void) | |
1276 | { | |
1277 | usb_deregister(&uas_driver); | |
1278 | destroy_workqueue(workqueue); | |
1279 | } | |
1280 | ||
1281 | module_init(uas_init); | |
1282 | module_exit(uas_exit); | |
115bb1ff MW |
1283 | |
1284 | MODULE_LICENSE("GPL"); | |
32bca2df | 1285 | MODULE_IMPORT_NS(USB_STORAGE); |
f50a4968 HG |
1286 | MODULE_AUTHOR( |
1287 | "Hans de Goede <hdegoede@redhat.com>, Matthew Wilcox and Sarah Sharp"); |