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; | |
59307852 | 40 | unsigned long 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]; | |
116 | cmdinfo = (void *)&cmnd->SCp; | |
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 | ||
1bf8198e GH |
142 | static void uas_add_work(struct uas_cmd_info *cmdinfo) |
143 | { | |
144 | struct scsi_pointer *scp = (void *)cmdinfo; | |
145 | struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, SCp); | |
146 | struct uas_dev_info *devinfo = cmnd->device->hostdata; | |
147 | ||
ab945eff | 148 | lockdep_assert_held(&devinfo->lock); |
1bf8198e | 149 | cmdinfo->state |= IS_IN_WORK_LIST; |
f6cc6093 | 150 | queue_work(workqueue, &devinfo->work); |
1bf8198e GH |
151 | } |
152 | ||
1589349f | 153 | static void uas_zap_pending(struct uas_dev_info *devinfo, int result) |
326349f8 GH |
154 | { |
155 | struct uas_cmd_info *cmdinfo; | |
43cd99cb | 156 | struct scsi_cmnd *cmnd; |
326349f8 | 157 | unsigned long flags; |
43cd99cb | 158 | int i, err; |
326349f8 GH |
159 | |
160 | spin_lock_irqsave(&devinfo->lock, flags); | |
43cd99cb HG |
161 | for (i = 0; i < devinfo->qdepth; i++) { |
162 | if (!devinfo->cmnd[i]) | |
163 | continue; | |
164 | ||
165 | cmnd = devinfo->cmnd[i]; | |
166 | cmdinfo = (void *)&cmnd->SCp; | |
1ad7ed5a | 167 | uas_log_cmd_state(cmnd, __func__, 0); |
9c15c573 HG |
168 | /* Sense urbs were killed, clear COMMAND_INFLIGHT manually */ |
169 | cmdinfo->state &= ~COMMAND_INFLIGHT; | |
1589349f | 170 | cmnd->result = result << 16; |
9c15c573 HG |
171 | err = uas_try_complete(cmnd, __func__); |
172 | WARN_ON(err != 0); | |
326349f8 GH |
173 | } |
174 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
175 | } | |
176 | ||
115bb1ff MW |
177 | static void uas_sense(struct urb *urb, struct scsi_cmnd *cmnd) |
178 | { | |
179 | struct sense_iu *sense_iu = urb->transfer_buffer; | |
180 | struct scsi_device *sdev = cmnd->device; | |
181 | ||
182 | if (urb->actual_length > 16) { | |
183 | unsigned len = be16_to_cpup(&sense_iu->len); | |
184 | if (len + 16 != urb->actual_length) { | |
185 | int newlen = min(len + 16, urb->actual_length) - 16; | |
186 | if (newlen < 0) | |
187 | newlen = 0; | |
188 | sdev_printk(KERN_INFO, sdev, "%s: urb length %d " | |
189 | "disagrees with IU sense data length %d, " | |
190 | "using %d bytes of sense data\n", __func__, | |
191 | urb->actual_length, len, newlen); | |
192 | len = newlen; | |
193 | } | |
194 | memcpy(cmnd->sense_buffer, sense_iu->sense, len); | |
195 | } | |
196 | ||
197 | cmnd->result = sense_iu->status; | |
115bb1ff MW |
198 | } |
199 | ||
1ad7ed5a HG |
200 | static void uas_log_cmd_state(struct scsi_cmnd *cmnd, const char *prefix, |
201 | int status) | |
b1d67693 GH |
202 | { |
203 | struct uas_cmd_info *ci = (void *)&cmnd->SCp; | |
e28e2f2f | 204 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; |
b1d67693 | 205 | |
5963dec9 ON |
206 | if (status == -ENODEV) /* too late */ |
207 | return; | |
208 | ||
60d9f67d | 209 | scmd_printk(KERN_INFO, cmnd, |
e28e2f2f HG |
210 | "%s %d uas-tag %d inflight:%s%s%s%s%s%s%s%s%s%s%s%s ", |
211 | prefix, status, cmdinfo->uas_tag, | |
b1d67693 GH |
212 | (ci->state & SUBMIT_STATUS_URB) ? " s-st" : "", |
213 | (ci->state & ALLOC_DATA_IN_URB) ? " a-in" : "", | |
214 | (ci->state & SUBMIT_DATA_IN_URB) ? " s-in" : "", | |
215 | (ci->state & ALLOC_DATA_OUT_URB) ? " a-out" : "", | |
216 | (ci->state & SUBMIT_DATA_OUT_URB) ? " s-out" : "", | |
217 | (ci->state & ALLOC_CMD_URB) ? " a-cmd" : "", | |
218 | (ci->state & SUBMIT_CMD_URB) ? " s-cmd" : "", | |
219 | (ci->state & COMMAND_INFLIGHT) ? " CMD" : "", | |
220 | (ci->state & DATA_IN_URB_INFLIGHT) ? " IN" : "", | |
221 | (ci->state & DATA_OUT_URB_INFLIGHT) ? " OUT" : "", | |
b06e48af | 222 | (ci->state & COMMAND_ABORTED) ? " abort" : "", |
efefecf3 | 223 | (ci->state & IS_IN_WORK_LIST) ? " work" : ""); |
6dcd8ec2 | 224 | scsi_print_command(cmnd); |
b1d67693 GH |
225 | } |
226 | ||
4c5481ef HG |
227 | static void uas_free_unsubmitted_urbs(struct scsi_cmnd *cmnd) |
228 | { | |
229 | struct uas_cmd_info *cmdinfo; | |
230 | ||
231 | if (!cmnd) | |
232 | return; | |
233 | ||
234 | cmdinfo = (void *)&cmnd->SCp; | |
235 | ||
236 | if (cmdinfo->state & SUBMIT_CMD_URB) | |
237 | usb_free_urb(cmdinfo->cmd_urb); | |
238 | ||
239 | /* data urbs may have never gotten their submit flag set */ | |
240 | if (!(cmdinfo->state & DATA_IN_URB_INFLIGHT)) | |
241 | usb_free_urb(cmdinfo->data_in_urb); | |
242 | if (!(cmdinfo->state & DATA_OUT_URB_INFLIGHT)) | |
243 | usb_free_urb(cmdinfo->data_out_urb); | |
b1d67693 GH |
244 | } |
245 | ||
246 | static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller) | |
247 | { | |
248 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
e0648520 | 249 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
b1d67693 | 250 | |
ab945eff | 251 | lockdep_assert_held(&devinfo->lock); |
b1d67693 GH |
252 | if (cmdinfo->state & (COMMAND_INFLIGHT | |
253 | DATA_IN_URB_INFLIGHT | | |
b06e48af | 254 | DATA_OUT_URB_INFLIGHT | |
616f0e6c | 255 | COMMAND_ABORTED)) |
b1d67693 | 256 | return -EBUSY; |
e28e2f2f | 257 | devinfo->cmnd[cmdinfo->uas_tag - 1] = NULL; |
4c5481ef | 258 | uas_free_unsubmitted_urbs(cmnd); |
c621a81e | 259 | cmnd->scsi_done(cmnd); |
b1d67693 | 260 | return 0; |
115bb1ff MW |
261 | } |
262 | ||
263 | static void uas_xfer_data(struct urb *urb, struct scsi_cmnd *cmnd, | |
b1d67693 | 264 | unsigned direction) |
115bb1ff MW |
265 | { |
266 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
267 | int err; | |
268 | ||
b1d67693 | 269 | cmdinfo->state |= direction | SUBMIT_STATUS_URB; |
b36d8391 | 270 | err = uas_submit_urbs(cmnd, cmnd->device->hostdata); |
115bb1ff | 271 | if (err) { |
1bf8198e | 272 | uas_add_work(cmdinfo); |
115bb1ff MW |
273 | } |
274 | } | |
275 | ||
aa742683 ON |
276 | static bool uas_evaluate_response_iu(struct response_iu *riu, struct scsi_cmnd *cmnd) |
277 | { | |
278 | u8 response_code = riu->response_code; | |
279 | ||
280 | switch (response_code) { | |
281 | case RC_INCORRECT_LUN: | |
282 | cmnd->result = DID_BAD_TARGET << 16; | |
283 | break; | |
284 | case RC_TMF_SUCCEEDED: | |
285 | cmnd->result = DID_OK << 16; | |
286 | break; | |
287 | case RC_TMF_NOT_SUPPORTED: | |
288 | cmnd->result = DID_TARGET_FAILURE << 16; | |
289 | break; | |
290 | default: | |
291 | uas_log_cmd_state(cmnd, "response iu", response_code); | |
292 | cmnd->result = DID_ERROR << 16; | |
293 | break; | |
294 | } | |
295 | ||
296 | return response_code == RC_TMF_SUCCEEDED; | |
297 | } | |
298 | ||
115bb1ff MW |
299 | static void uas_stat_cmplt(struct urb *urb) |
300 | { | |
301 | struct iu *iu = urb->transfer_buffer; | |
22188f4a | 302 | struct Scsi_Host *shost = urb->context; |
21fc05b6 | 303 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
60d9f67d HG |
304 | struct urb *data_in_urb = NULL; |
305 | struct urb *data_out_urb = NULL; | |
115bb1ff | 306 | struct scsi_cmnd *cmnd; |
b1d67693 | 307 | struct uas_cmd_info *cmdinfo; |
e0648520 | 308 | unsigned long flags; |
5e61aede | 309 | unsigned int idx; |
cca26be3 | 310 | int status = urb->status; |
aa742683 | 311 | bool success; |
115bb1ff | 312 | |
b7b5d11f HG |
313 | spin_lock_irqsave(&devinfo->lock, flags); |
314 | ||
315 | if (devinfo->resetting) | |
316 | goto out; | |
115bb1ff | 317 | |
cca26be3 ON |
318 | if (status) { |
319 | if (status != -ENOENT && status != -ECONNRESET && status != -ESHUTDOWN) | |
320 | dev_err(&urb->dev->dev, "stat urb: status %d\n", status); | |
b7b5d11f | 321 | goto out; |
115bb1ff MW |
322 | } |
323 | ||
5e61aede HG |
324 | idx = be16_to_cpup(&iu->tag) - 1; |
325 | if (idx >= MAX_CMNDS || !devinfo->cmnd[idx]) { | |
326 | dev_err(&urb->dev->dev, | |
e28e2f2f | 327 | "stat urb: no pending cmd for uas-tag %d\n", idx + 1); |
b7b5d11f | 328 | goto out; |
023b515e GH |
329 | } |
330 | ||
5e61aede | 331 | cmnd = devinfo->cmnd[idx]; |
e0423dee | 332 | cmdinfo = (void *)&cmnd->SCp; |
d89da03a HG |
333 | |
334 | if (!(cmdinfo->state & COMMAND_INFLIGHT)) { | |
1ad7ed5a | 335 | uas_log_cmd_state(cmnd, "unexpected status cmplt", 0); |
d89da03a | 336 | goto out; |
96c1eb98 | 337 | } |
115bb1ff MW |
338 | |
339 | switch (iu->iu_id) { | |
340 | case IU_ID_STATUS: | |
5ad22cfc | 341 | uas_sense(urb, cmnd); |
8aac863e GH |
342 | if (cmnd->result != 0) { |
343 | /* cancel data transfers on error */ | |
60d9f67d HG |
344 | data_in_urb = usb_get_urb(cmdinfo->data_in_urb); |
345 | data_out_urb = usb_get_urb(cmdinfo->data_out_urb); | |
8aac863e | 346 | } |
b1d67693 GH |
347 | cmdinfo->state &= ~COMMAND_INFLIGHT; |
348 | uas_try_complete(cmnd, __func__); | |
115bb1ff MW |
349 | break; |
350 | case IU_ID_READ_READY: | |
8e453155 HG |
351 | if (!cmdinfo->data_in_urb || |
352 | (cmdinfo->state & DATA_IN_URB_INFLIGHT)) { | |
1ad7ed5a | 353 | uas_log_cmd_state(cmnd, "unexpected read rdy", 0); |
8e453155 HG |
354 | break; |
355 | } | |
115bb1ff MW |
356 | uas_xfer_data(urb, cmnd, SUBMIT_DATA_IN_URB); |
357 | break; | |
358 | case IU_ID_WRITE_READY: | |
8e453155 HG |
359 | if (!cmdinfo->data_out_urb || |
360 | (cmdinfo->state & DATA_OUT_URB_INFLIGHT)) { | |
1ad7ed5a | 361 | uas_log_cmd_state(cmnd, "unexpected write rdy", 0); |
8e453155 HG |
362 | break; |
363 | } | |
115bb1ff MW |
364 | uas_xfer_data(urb, cmnd, SUBMIT_DATA_OUT_URB); |
365 | break; | |
fac1f485 | 366 | case IU_ID_RESPONSE: |
fac1f485 | 367 | cmdinfo->state &= ~COMMAND_INFLIGHT; |
aa742683 ON |
368 | success = uas_evaluate_response_iu((struct response_iu *)iu, cmnd); |
369 | if (!success) { | |
370 | /* Error, cancel data transfers */ | |
371 | data_in_urb = usb_get_urb(cmdinfo->data_in_urb); | |
372 | data_out_urb = usb_get_urb(cmdinfo->data_out_urb); | |
373 | } | |
fac1f485 HG |
374 | uas_try_complete(cmnd, __func__); |
375 | break; | |
115bb1ff | 376 | default: |
1ad7ed5a | 377 | uas_log_cmd_state(cmnd, "bogus IU", iu->iu_id); |
115bb1ff | 378 | } |
b7b5d11f | 379 | out: |
e9bd7e1a | 380 | usb_free_urb(urb); |
e0648520 | 381 | spin_unlock_irqrestore(&devinfo->lock, flags); |
60d9f67d HG |
382 | |
383 | /* Unlinking of data urbs must be done without holding the lock */ | |
384 | if (data_in_urb) { | |
385 | usb_unlink_urb(data_in_urb); | |
386 | usb_put_urb(data_in_urb); | |
387 | } | |
388 | if (data_out_urb) { | |
389 | usb_unlink_urb(data_out_urb); | |
390 | usb_put_urb(data_out_urb); | |
391 | } | |
115bb1ff MW |
392 | } |
393 | ||
c621a81e | 394 | static void uas_data_cmplt(struct urb *urb) |
115bb1ff | 395 | { |
b1d67693 GH |
396 | struct scsi_cmnd *cmnd = urb->context; |
397 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
e0648520 | 398 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
ae3d56d8 | 399 | struct scsi_data_buffer *sdb = &cmnd->sdb; |
e0648520 | 400 | unsigned long flags; |
cca26be3 | 401 | int status = urb->status; |
b1d67693 | 402 | |
e0648520 | 403 | spin_lock_irqsave(&devinfo->lock, flags); |
b7b5d11f | 404 | |
b1d67693 | 405 | if (cmdinfo->data_in_urb == urb) { |
b1d67693 | 406 | cmdinfo->state &= ~DATA_IN_URB_INFLIGHT; |
85fea825 | 407 | cmdinfo->data_in_urb = NULL; |
b1d67693 | 408 | } else if (cmdinfo->data_out_urb == urb) { |
b1d67693 | 409 | cmdinfo->state &= ~DATA_OUT_URB_INFLIGHT; |
85fea825 | 410 | cmdinfo->data_out_urb = NULL; |
b1d67693 | 411 | } |
b7b5d11f HG |
412 | |
413 | if (devinfo->resetting) | |
414 | goto out; | |
415 | ||
d89da03a HG |
416 | /* Data urbs should not complete before the cmd urb is submitted */ |
417 | if (cmdinfo->state & SUBMIT_CMD_URB) { | |
1ad7ed5a | 418 | uas_log_cmd_state(cmnd, "unexpected data cmplt", 0); |
d89da03a HG |
419 | goto out; |
420 | } | |
421 | ||
cca26be3 ON |
422 | if (status) { |
423 | if (status != -ENOENT && status != -ECONNRESET && status != -ESHUTDOWN) | |
424 | uas_log_cmd_state(cmnd, "data cmplt err", status); | |
8aac863e | 425 | /* error: no data transfered */ |
229531be | 426 | scsi_set_resid(cmnd, sdb->length); |
8aac863e | 427 | } else { |
229531be | 428 | scsi_set_resid(cmnd, sdb->length - urb->actual_length); |
8aac863e | 429 | } |
b1d67693 | 430 | uas_try_complete(cmnd, __func__); |
b7b5d11f | 431 | out: |
85fea825 | 432 | usb_free_urb(urb); |
e0648520 | 433 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
434 | } |
435 | ||
876285cc HG |
436 | static void uas_cmd_cmplt(struct urb *urb) |
437 | { | |
b6823c51 HG |
438 | if (urb->status) |
439 | dev_err(&urb->dev->dev, "cmd cmplt err %d\n", urb->status); | |
876285cc | 440 | |
876285cc HG |
441 | usb_free_urb(urb); |
442 | } | |
443 | ||
115bb1ff | 444 | static struct urb *uas_alloc_data_urb(struct uas_dev_info *devinfo, gfp_t gfp, |
b1d67693 GH |
445 | struct scsi_cmnd *cmnd, |
446 | enum dma_data_direction dir) | |
115bb1ff MW |
447 | { |
448 | struct usb_device *udev = devinfo->udev; | |
2d75b9cb | 449 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; |
115bb1ff | 450 | struct urb *urb = usb_alloc_urb(0, gfp); |
ae3d56d8 | 451 | struct scsi_data_buffer *sdb = &cmnd->sdb; |
2d75b9cb HG |
452 | unsigned int pipe = (dir == DMA_FROM_DEVICE) |
453 | ? devinfo->data_in_pipe : devinfo->data_out_pipe; | |
115bb1ff MW |
454 | |
455 | if (!urb) | |
456 | goto out; | |
b1d67693 GH |
457 | usb_fill_bulk_urb(urb, udev, pipe, NULL, sdb->length, |
458 | uas_data_cmplt, cmnd); | |
e28e2f2f HG |
459 | if (devinfo->use_streams) |
460 | urb->stream_id = cmdinfo->uas_tag; | |
115bb1ff MW |
461 | urb->num_sgs = udev->bus->sg_tablesize ? sdb->table.nents : 0; |
462 | urb->sg = sdb->table.sgl; | |
463 | out: | |
464 | return urb; | |
465 | } | |
466 | ||
467 | static struct urb *uas_alloc_sense_urb(struct uas_dev_info *devinfo, gfp_t gfp, | |
2d75b9cb | 468 | struct scsi_cmnd *cmnd) |
115bb1ff MW |
469 | { |
470 | struct usb_device *udev = devinfo->udev; | |
2d75b9cb | 471 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; |
115bb1ff MW |
472 | struct urb *urb = usb_alloc_urb(0, gfp); |
473 | struct sense_iu *iu; | |
474 | ||
475 | if (!urb) | |
476 | goto out; | |
477 | ||
ac563cfd | 478 | iu = kzalloc(sizeof(*iu), gfp); |
115bb1ff MW |
479 | if (!iu) |
480 | goto free; | |
481 | ||
482 | usb_fill_bulk_urb(urb, udev, devinfo->status_pipe, iu, sizeof(*iu), | |
2d75b9cb | 483 | uas_stat_cmplt, cmnd->device->host); |
e28e2f2f HG |
484 | if (devinfo->use_streams) |
485 | urb->stream_id = cmdinfo->uas_tag; | |
115bb1ff MW |
486 | urb->transfer_flags |= URB_FREE_BUFFER; |
487 | out: | |
488 | return urb; | |
489 | free: | |
490 | usb_free_urb(urb); | |
491 | return NULL; | |
492 | } | |
493 | ||
494 | static struct urb *uas_alloc_cmd_urb(struct uas_dev_info *devinfo, gfp_t gfp, | |
a887cd36 | 495 | struct scsi_cmnd *cmnd) |
115bb1ff MW |
496 | { |
497 | struct usb_device *udev = devinfo->udev; | |
498 | struct scsi_device *sdev = cmnd->device; | |
e28e2f2f | 499 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; |
115bb1ff MW |
500 | struct urb *urb = usb_alloc_urb(0, gfp); |
501 | struct command_iu *iu; | |
502 | int len; | |
503 | ||
504 | if (!urb) | |
505 | goto out; | |
506 | ||
507 | len = cmnd->cmd_len - 16; | |
508 | if (len < 0) | |
509 | len = 0; | |
510 | len = ALIGN(len, 4); | |
ac563cfd | 511 | iu = kzalloc(sizeof(*iu) + len, gfp); |
115bb1ff MW |
512 | if (!iu) |
513 | goto free; | |
514 | ||
515 | iu->iu_id = IU_ID_COMMAND; | |
e28e2f2f | 516 | iu->tag = cpu_to_be16(cmdinfo->uas_tag); |
02e031cb | 517 | iu->prio_attr = UAS_SIMPLE_TAG; |
115bb1ff MW |
518 | iu->len = len; |
519 | int_to_scsilun(sdev->lun, &iu->lun); | |
520 | memcpy(iu->cdb, cmnd->cmnd, cmnd->cmd_len); | |
521 | ||
522 | usb_fill_bulk_urb(urb, udev, devinfo->cmd_pipe, iu, sizeof(*iu) + len, | |
b6823c51 | 523 | uas_cmd_cmplt, NULL); |
115bb1ff MW |
524 | urb->transfer_flags |= URB_FREE_BUFFER; |
525 | out: | |
526 | return urb; | |
527 | free: | |
528 | usb_free_urb(urb); | |
529 | return NULL; | |
530 | } | |
531 | ||
532 | /* | |
533 | * Why should I request the Status IU before sending the Command IU? Spec | |
534 | * says to, but also says the device may receive them in any order. Seems | |
535 | * daft to me. | |
536 | */ | |
537 | ||
2d75b9cb | 538 | static struct urb *uas_submit_sense_urb(struct scsi_cmnd *cmnd, gfp_t gfp) |
115bb1ff | 539 | { |
2d75b9cb | 540 | struct uas_dev_info *devinfo = cmnd->device->hostdata; |
e9bd7e1a | 541 | struct urb *urb; |
876285cc | 542 | int err; |
115bb1ff | 543 | |
2d75b9cb | 544 | urb = uas_alloc_sense_urb(devinfo, gfp, cmnd); |
e9bd7e1a | 545 | if (!urb) |
70cf0fba | 546 | return NULL; |
d5f808d3 | 547 | usb_anchor_urb(urb, &devinfo->sense_urbs); |
876285cc HG |
548 | err = usb_submit_urb(urb, gfp); |
549 | if (err) { | |
d5f808d3 | 550 | usb_unanchor_urb(urb); |
1ad7ed5a | 551 | uas_log_cmd_state(cmnd, "sense submit err", err); |
e9bd7e1a | 552 | usb_free_urb(urb); |
70cf0fba | 553 | return NULL; |
115bb1ff | 554 | } |
70cf0fba | 555 | return urb; |
e9bd7e1a GH |
556 | } |
557 | ||
558 | static int uas_submit_urbs(struct scsi_cmnd *cmnd, | |
b36d8391 | 559 | struct uas_dev_info *devinfo) |
e9bd7e1a GH |
560 | { |
561 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
70cf0fba | 562 | struct urb *urb; |
876285cc | 563 | int err; |
115bb1ff | 564 | |
ab945eff | 565 | lockdep_assert_held(&devinfo->lock); |
92a3f767 | 566 | if (cmdinfo->state & SUBMIT_STATUS_URB) { |
b36d8391 | 567 | urb = uas_submit_sense_urb(cmnd, GFP_ATOMIC); |
70cf0fba HG |
568 | if (!urb) |
569 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
92a3f767 | 570 | cmdinfo->state &= ~SUBMIT_STATUS_URB; |
115bb1ff MW |
571 | } |
572 | ||
573 | if (cmdinfo->state & ALLOC_DATA_IN_URB) { | |
b36d8391 | 574 | cmdinfo->data_in_urb = uas_alloc_data_urb(devinfo, GFP_ATOMIC, |
2d75b9cb | 575 | cmnd, DMA_FROM_DEVICE); |
115bb1ff MW |
576 | if (!cmdinfo->data_in_urb) |
577 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
578 | cmdinfo->state &= ~ALLOC_DATA_IN_URB; | |
579 | } | |
580 | ||
581 | if (cmdinfo->state & SUBMIT_DATA_IN_URB) { | |
d5f808d3 | 582 | usb_anchor_urb(cmdinfo->data_in_urb, &devinfo->data_urbs); |
b36d8391 | 583 | err = usb_submit_urb(cmdinfo->data_in_urb, GFP_ATOMIC); |
876285cc | 584 | if (err) { |
d5f808d3 | 585 | usb_unanchor_urb(cmdinfo->data_in_urb); |
1ad7ed5a | 586 | uas_log_cmd_state(cmnd, "data in submit err", err); |
115bb1ff MW |
587 | return SCSI_MLQUEUE_DEVICE_BUSY; |
588 | } | |
589 | cmdinfo->state &= ~SUBMIT_DATA_IN_URB; | |
b1d67693 | 590 | cmdinfo->state |= DATA_IN_URB_INFLIGHT; |
115bb1ff MW |
591 | } |
592 | ||
593 | if (cmdinfo->state & ALLOC_DATA_OUT_URB) { | |
b36d8391 | 594 | cmdinfo->data_out_urb = uas_alloc_data_urb(devinfo, GFP_ATOMIC, |
2d75b9cb | 595 | cmnd, DMA_TO_DEVICE); |
115bb1ff MW |
596 | if (!cmdinfo->data_out_urb) |
597 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
598 | cmdinfo->state &= ~ALLOC_DATA_OUT_URB; | |
599 | } | |
600 | ||
601 | if (cmdinfo->state & SUBMIT_DATA_OUT_URB) { | |
d5f808d3 | 602 | usb_anchor_urb(cmdinfo->data_out_urb, &devinfo->data_urbs); |
b36d8391 | 603 | err = usb_submit_urb(cmdinfo->data_out_urb, GFP_ATOMIC); |
876285cc | 604 | if (err) { |
d5f808d3 | 605 | usb_unanchor_urb(cmdinfo->data_out_urb); |
1ad7ed5a | 606 | uas_log_cmd_state(cmnd, "data out submit err", err); |
115bb1ff MW |
607 | return SCSI_MLQUEUE_DEVICE_BUSY; |
608 | } | |
609 | cmdinfo->state &= ~SUBMIT_DATA_OUT_URB; | |
b1d67693 | 610 | cmdinfo->state |= DATA_OUT_URB_INFLIGHT; |
115bb1ff MW |
611 | } |
612 | ||
613 | if (cmdinfo->state & ALLOC_CMD_URB) { | |
b36d8391 | 614 | cmdinfo->cmd_urb = uas_alloc_cmd_urb(devinfo, GFP_ATOMIC, cmnd); |
115bb1ff MW |
615 | if (!cmdinfo->cmd_urb) |
616 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
617 | cmdinfo->state &= ~ALLOC_CMD_URB; | |
618 | } | |
619 | ||
620 | if (cmdinfo->state & SUBMIT_CMD_URB) { | |
d5f808d3 | 621 | usb_anchor_urb(cmdinfo->cmd_urb, &devinfo->cmd_urbs); |
b36d8391 | 622 | err = usb_submit_urb(cmdinfo->cmd_urb, GFP_ATOMIC); |
876285cc | 623 | if (err) { |
d5f808d3 | 624 | usb_unanchor_urb(cmdinfo->cmd_urb); |
1ad7ed5a | 625 | uas_log_cmd_state(cmnd, "cmd submit err", err); |
115bb1ff MW |
626 | return SCSI_MLQUEUE_DEVICE_BUSY; |
627 | } | |
a0e39e34 | 628 | cmdinfo->cmd_urb = NULL; |
115bb1ff | 629 | cmdinfo->state &= ~SUBMIT_CMD_URB; |
b1d67693 | 630 | cmdinfo->state |= COMMAND_INFLIGHT; |
115bb1ff MW |
631 | } |
632 | ||
633 | return 0; | |
634 | } | |
635 | ||
f281233d | 636 | static int uas_queuecommand_lck(struct scsi_cmnd *cmnd, |
115bb1ff MW |
637 | void (*done)(struct scsi_cmnd *)) |
638 | { | |
639 | struct scsi_device *sdev = cmnd->device; | |
640 | struct uas_dev_info *devinfo = sdev->hostdata; | |
641 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
e0648520 | 642 | unsigned long flags; |
e28e2f2f | 643 | int idx, err; |
115bb1ff MW |
644 | |
645 | BUILD_BUG_ON(sizeof(struct uas_cmd_info) > sizeof(struct scsi_pointer)); | |
646 | ||
f9dc024a HG |
647 | /* Re-check scsi_block_requests now that we've the host-lock */ |
648 | if (cmnd->device->host->host_self_blocked) | |
649 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
650 | ||
59307852 HG |
651 | if ((devinfo->flags & US_FL_NO_ATA_1X) && |
652 | (cmnd->cmnd[0] == ATA_12 || cmnd->cmnd[0] == ATA_16)) { | |
653 | memcpy(cmnd->sense_buffer, usb_stor_sense_invalidCDB, | |
654 | sizeof(usb_stor_sense_invalidCDB)); | |
655 | cmnd->result = SAM_STAT_CHECK_CONDITION; | |
656 | cmnd->scsi_done(cmnd); | |
657 | return 0; | |
658 | } | |
659 | ||
c6f63207 HG |
660 | spin_lock_irqsave(&devinfo->lock, flags); |
661 | ||
f8be6bfc GH |
662 | if (devinfo->resetting) { |
663 | cmnd->result = DID_ERROR << 16; | |
664 | cmnd->scsi_done(cmnd); | |
325b0087 | 665 | goto zombie; |
f8be6bfc GH |
666 | } |
667 | ||
e28e2f2f HG |
668 | /* Find a free uas-tag */ |
669 | for (idx = 0; idx < devinfo->qdepth; idx++) { | |
670 | if (!devinfo->cmnd[idx]) | |
671 | break; | |
672 | } | |
673 | if (idx == devinfo->qdepth) { | |
e0648520 | 674 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff | 675 | return SCSI_MLQUEUE_DEVICE_BUSY; |
e0648520 | 676 | } |
115bb1ff | 677 | |
115bb1ff MW |
678 | cmnd->scsi_done = done; |
679 | ||
5e61aede | 680 | memset(cmdinfo, 0, sizeof(*cmdinfo)); |
e28e2f2f | 681 | cmdinfo->uas_tag = idx + 1; /* uas-tag == usb-stream-id, so 1 based */ |
e0620001 | 682 | cmdinfo->state = SUBMIT_STATUS_URB | ALLOC_CMD_URB | SUBMIT_CMD_URB; |
115bb1ff MW |
683 | |
684 | switch (cmnd->sc_data_direction) { | |
685 | case DMA_FROM_DEVICE: | |
686 | cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB; | |
687 | break; | |
688 | case DMA_BIDIRECTIONAL: | |
689 | cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB; | |
df561f66 | 690 | fallthrough; |
115bb1ff MW |
691 | case DMA_TO_DEVICE: |
692 | cmdinfo->state |= ALLOC_DATA_OUT_URB | SUBMIT_DATA_OUT_URB; | |
693 | case DMA_NONE: | |
694 | break; | |
695 | } | |
696 | ||
e28e2f2f | 697 | if (!devinfo->use_streams) |
db32de11 | 698 | cmdinfo->state &= ~(SUBMIT_DATA_IN_URB | SUBMIT_DATA_OUT_URB); |
115bb1ff | 699 | |
b36d8391 | 700 | err = uas_submit_urbs(cmnd, devinfo); |
325b0087 ON |
701 | /* |
702 | * in case of fatal errors the SCSI layer is peculiar | |
703 | * a command that has finished is a success for the purpose | |
704 | * of queueing, no matter how fatal the error | |
705 | */ | |
706 | if (err == -ENODEV) { | |
707 | cmnd->result = DID_ERROR << 16; | |
708 | cmnd->scsi_done(cmnd); | |
709 | goto zombie; | |
710 | } | |
115bb1ff MW |
711 | if (err) { |
712 | /* If we did nothing, give up now */ | |
92a3f767 | 713 | if (cmdinfo->state & SUBMIT_STATUS_URB) { |
e0648520 | 714 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
715 | return SCSI_MLQUEUE_DEVICE_BUSY; |
716 | } | |
1bf8198e | 717 | uas_add_work(cmdinfo); |
115bb1ff MW |
718 | } |
719 | ||
e28e2f2f | 720 | devinfo->cmnd[idx] = cmnd; |
325b0087 | 721 | zombie: |
e0648520 | 722 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
723 | return 0; |
724 | } | |
725 | ||
f281233d JG |
726 | static DEF_SCSI_QCMD(uas_queuecommand) |
727 | ||
616f0e6c HG |
728 | /* |
729 | * For now we do not support actually sending an abort to the device, so | |
730 | * this eh always fails. Still we must define it to make sure that we've | |
731 | * dropped all references to the cmnd in question once this function exits. | |
732 | */ | |
733 | static int uas_eh_abort_handler(struct scsi_cmnd *cmnd) | |
115bb1ff | 734 | { |
616f0e6c HG |
735 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; |
736 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; | |
737 | struct urb *data_in_urb = NULL; | |
738 | struct urb *data_out_urb = NULL; | |
e0648520 | 739 | unsigned long flags; |
115bb1ff | 740 | |
e0648520 | 741 | spin_lock_irqsave(&devinfo->lock, flags); |
b83b86a3 | 742 | |
1ad7ed5a | 743 | uas_log_cmd_state(cmnd, __func__, 0); |
c6f63207 | 744 | |
616f0e6c HG |
745 | /* Ensure that try_complete does not call scsi_done */ |
746 | cmdinfo->state |= COMMAND_ABORTED; | |
b83b86a3 | 747 | |
616f0e6c | 748 | /* Drop all refs to this cmnd, kill data urbs to break their ref */ |
e28e2f2f | 749 | devinfo->cmnd[cmdinfo->uas_tag - 1] = NULL; |
616f0e6c HG |
750 | if (cmdinfo->state & DATA_IN_URB_INFLIGHT) |
751 | data_in_urb = usb_get_urb(cmdinfo->data_in_urb); | |
752 | if (cmdinfo->state & DATA_OUT_URB_INFLIGHT) | |
753 | data_out_urb = usb_get_urb(cmdinfo->data_out_urb); | |
e0648520 | 754 | |
4c5481ef | 755 | uas_free_unsubmitted_urbs(cmnd); |
b83b86a3 | 756 | |
b83b86a3 HG |
757 | spin_unlock_irqrestore(&devinfo->lock, flags); |
758 | ||
616f0e6c HG |
759 | if (data_in_urb) { |
760 | usb_kill_urb(data_in_urb); | |
761 | usb_put_urb(data_in_urb); | |
c6f63207 | 762 | } |
616f0e6c HG |
763 | if (data_out_urb) { |
764 | usb_kill_urb(data_out_urb); | |
765 | usb_put_urb(data_out_urb); | |
5d390403 | 766 | } |
115bb1ff | 767 | |
616f0e6c | 768 | return FAILED; |
115bb1ff MW |
769 | } |
770 | ||
e13849b7 | 771 | static int uas_eh_device_reset_handler(struct scsi_cmnd *cmnd) |
115bb1ff MW |
772 | { |
773 | struct scsi_device *sdev = cmnd->device; | |
774 | struct uas_dev_info *devinfo = sdev->hostdata; | |
775 | struct usb_device *udev = devinfo->udev; | |
b7b5d11f | 776 | unsigned long flags; |
023b515e | 777 | int err; |
115bb1ff | 778 | |
be326f4c HG |
779 | err = usb_lock_device_for_reset(udev, devinfo->intf); |
780 | if (err) { | |
781 | shost_printk(KERN_ERR, sdev->host, | |
782 | "%s FAILED to get lock err %d\n", __func__, err); | |
783 | return FAILED; | |
784 | } | |
785 | ||
326349f8 | 786 | shost_printk(KERN_INFO, sdev->host, "%s start\n", __func__); |
b7b5d11f HG |
787 | |
788 | spin_lock_irqsave(&devinfo->lock, flags); | |
023b515e | 789 | devinfo->resetting = 1; |
b7b5d11f HG |
790 | spin_unlock_irqrestore(&devinfo->lock, flags); |
791 | ||
a0e39e34 | 792 | usb_kill_anchored_urbs(&devinfo->cmd_urbs); |
023b515e GH |
793 | usb_kill_anchored_urbs(&devinfo->sense_urbs); |
794 | usb_kill_anchored_urbs(&devinfo->data_urbs); | |
1589349f HG |
795 | uas_zap_pending(devinfo, DID_RESET); |
796 | ||
023b515e | 797 | err = usb_reset_device(udev); |
b7b5d11f HG |
798 | |
799 | spin_lock_irqsave(&devinfo->lock, flags); | |
023b515e | 800 | devinfo->resetting = 0; |
b7b5d11f | 801 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff | 802 | |
be326f4c HG |
803 | usb_unlock_device(udev); |
804 | ||
023b515e | 805 | if (err) { |
ce39fe6f HG |
806 | shost_printk(KERN_INFO, sdev->host, "%s FAILED err %d\n", |
807 | __func__, err); | |
023b515e GH |
808 | return FAILED; |
809 | } | |
115bb1ff | 810 | |
023b515e GH |
811 | shost_printk(KERN_INFO, sdev->host, "%s success\n", __func__); |
812 | return SUCCESS; | |
115bb1ff MW |
813 | } |
814 | ||
13630746 HG |
815 | static int uas_target_alloc(struct scsi_target *starget) |
816 | { | |
817 | struct uas_dev_info *devinfo = (struct uas_dev_info *) | |
818 | dev_to_shost(starget->dev.parent)->hostdata; | |
819 | ||
820 | if (devinfo->flags & US_FL_NO_REPORT_LUNS) | |
821 | starget->no_report_luns = 1; | |
822 | ||
823 | return 0; | |
824 | } | |
825 | ||
115bb1ff MW |
826 | static int uas_slave_alloc(struct scsi_device *sdev) |
827 | { | |
ee136af4 HG |
828 | struct uas_dev_info *devinfo = |
829 | (struct uas_dev_info *)sdev->host->hostdata; | |
830 | ||
831 | sdev->hostdata = devinfo; | |
37599f96 | 832 | |
3ae62a42 ON |
833 | /* |
834 | * The protocol has no requirements on alignment in the strict sense. | |
835 | * Controllers may or may not have alignment restrictions. | |
836 | * As this is not exported, we use an extremely conservative guess. | |
37599f96 HG |
837 | */ |
838 | blk_queue_update_dma_alignment(sdev->request_queue, (512 - 1)); | |
839 | ||
ee136af4 HG |
840 | if (devinfo->flags & US_FL_MAX_SECTORS_64) |
841 | blk_queue_max_hw_sectors(sdev->request_queue, 64); | |
842 | else if (devinfo->flags & US_FL_MAX_SECTORS_240) | |
843 | blk_queue_max_hw_sectors(sdev->request_queue, 240); | |
844 | ||
115bb1ff MW |
845 | return 0; |
846 | } | |
847 | ||
848 | static int uas_slave_configure(struct scsi_device *sdev) | |
849 | { | |
850 | struct uas_dev_info *devinfo = sdev->hostdata; | |
734016b0 HG |
851 | |
852 | if (devinfo->flags & US_FL_NO_REPORT_OPCODES) | |
853 | sdev->no_report_opcodes = 1; | |
854 | ||
9fa62b1a DK |
855 | /* A few buggy USB-ATA bridges don't understand FUA */ |
856 | if (devinfo->flags & US_FL_BROKEN_FUA) | |
857 | sdev->broken_fua = 1; | |
858 | ||
8c4e97dd AK |
859 | /* UAS also needs to support FL_ALWAYS_SYNC */ |
860 | if (devinfo->flags & US_FL_ALWAYS_SYNC) { | |
861 | sdev->skip_ms_page_3f = 1; | |
862 | sdev->skip_ms_page_8 = 1; | |
863 | sdev->wce_default_on = 1; | |
864 | } | |
42d1c6d4 | 865 | |
bff000ca ON |
866 | /* Some disks cannot handle READ_CAPACITY_16 */ |
867 | if (devinfo->flags & US_FL_NO_READ_CAPACITY_16) | |
868 | sdev->no_read_capacity_16 = 1; | |
869 | ||
42d1c6d4 ON |
870 | /* |
871 | * Some disks return the total number of blocks in response | |
872 | * to READ CAPACITY rather than the highest block number. | |
873 | * If this device makes that mistake, tell the sd driver. | |
874 | */ | |
875 | if (devinfo->flags & US_FL_FIX_CAPACITY) | |
876 | sdev->fix_capacity = 1; | |
877 | ||
335cbbd5 ON |
878 | /* |
879 | * in some cases we have to guess | |
880 | */ | |
881 | if (devinfo->flags & US_FL_CAPACITY_HEURISTICS) | |
882 | sdev->guess_capacity = 1; | |
883 | ||
42d1c6d4 ON |
884 | /* |
885 | * Some devices don't like MODE SENSE with page=0x3f, | |
886 | * which is the command used for checking if a device | |
887 | * is write-protected. Now that we tell the sd driver | |
888 | * to do a 192-byte transfer with this command the | |
889 | * majority of devices work fine, but a few still can't | |
890 | * handle it. The sd driver will simply assume those | |
891 | * devices are write-enabled. | |
892 | */ | |
893 | if (devinfo->flags & US_FL_NO_WP_DETECT) | |
894 | sdev->skip_ms_page_3f = 1; | |
895 | ||
593224ea | 896 | scsi_change_queue_depth(sdev, devinfo->qdepth - 2); |
115bb1ff MW |
897 | return 0; |
898 | } | |
899 | ||
900 | static struct scsi_host_template uas_host_template = { | |
901 | .module = THIS_MODULE, | |
902 | .name = "uas", | |
903 | .queuecommand = uas_queuecommand, | |
13630746 | 904 | .target_alloc = uas_target_alloc, |
115bb1ff MW |
905 | .slave_alloc = uas_slave_alloc, |
906 | .slave_configure = uas_slave_configure, | |
907 | .eh_abort_handler = uas_eh_abort_handler, | |
e13849b7 | 908 | .eh_device_reset_handler = uas_eh_device_reset_handler, |
115bb1ff | 909 | .this_id = -1, |
115bb1ff | 910 | .skip_settle_delay = 1, |
4af14d11 | 911 | .dma_boundary = PAGE_SIZE - 1, |
115bb1ff MW |
912 | }; |
913 | ||
79b4c061 HG |
914 | #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \ |
915 | vendorName, productName, useProtocol, useTransport, \ | |
916 | initFunction, flags) \ | |
917 | { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \ | |
918 | .driver_info = (flags) } | |
919 | ||
115bb1ff | 920 | static struct usb_device_id uas_usb_ids[] = { |
79b4c061 | 921 | # include "unusual_uas.h" |
115bb1ff MW |
922 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_BULK) }, |
923 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_UAS) }, | |
115bb1ff MW |
924 | { } |
925 | }; | |
926 | MODULE_DEVICE_TABLE(usb, uas_usb_ids); | |
927 | ||
79b4c061 HG |
928 | #undef UNUSUAL_DEV |
929 | ||
e1be067b HG |
930 | static int uas_switch_interface(struct usb_device *udev, |
931 | struct usb_interface *intf) | |
932 | { | |
786de92b | 933 | struct usb_host_interface *alt; |
e1be067b HG |
934 | |
935 | alt = uas_find_uas_alt_setting(intf); | |
786de92b AS |
936 | if (!alt) |
937 | return -ENODEV; | |
e1be067b | 938 | |
786de92b AS |
939 | return usb_set_interface(udev, alt->desc.bInterfaceNumber, |
940 | alt->desc.bAlternateSetting); | |
e1be067b HG |
941 | } |
942 | ||
58d51444 | 943 | static int uas_configure_endpoints(struct uas_dev_info *devinfo) |
34f11e59 HG |
944 | { |
945 | struct usb_host_endpoint *eps[4] = { }; | |
946 | struct usb_device *udev = devinfo->udev; | |
947 | int r; | |
948 | ||
34f11e59 | 949 | r = uas_find_endpoints(devinfo->intf->cur_altsetting, eps); |
74d71aec HG |
950 | if (r) |
951 | return r; | |
952 | ||
953 | devinfo->cmd_pipe = usb_sndbulkpipe(udev, | |
954 | usb_endpoint_num(&eps[0]->desc)); | |
955 | devinfo->status_pipe = usb_rcvbulkpipe(udev, | |
956 | usb_endpoint_num(&eps[1]->desc)); | |
957 | devinfo->data_in_pipe = usb_rcvbulkpipe(udev, | |
958 | usb_endpoint_num(&eps[2]->desc)); | |
959 | devinfo->data_out_pipe = usb_sndbulkpipe(udev, | |
960 | usb_endpoint_num(&eps[3]->desc)); | |
115bb1ff | 961 | |
e5e55819 | 962 | if (udev->speed < USB_SPEED_SUPER) { |
e2875c33 | 963 | devinfo->qdepth = 32; |
115bb1ff MW |
964 | devinfo->use_streams = 0; |
965 | } else { | |
58d51444 | 966 | devinfo->qdepth = usb_alloc_streams(devinfo->intf, eps + 1, |
5e61aede | 967 | 3, MAX_CMNDS, GFP_NOIO); |
58d51444 HG |
968 | if (devinfo->qdepth < 0) |
969 | return devinfo->qdepth; | |
115bb1ff MW |
970 | devinfo->use_streams = 1; |
971 | } | |
58d51444 HG |
972 | |
973 | return 0; | |
115bb1ff MW |
974 | } |
975 | ||
dae51546 SAS |
976 | static void uas_free_streams(struct uas_dev_info *devinfo) |
977 | { | |
978 | struct usb_device *udev = devinfo->udev; | |
979 | struct usb_host_endpoint *eps[3]; | |
980 | ||
981 | eps[0] = usb_pipe_endpoint(udev, devinfo->status_pipe); | |
982 | eps[1] = usb_pipe_endpoint(udev, devinfo->data_in_pipe); | |
983 | eps[2] = usb_pipe_endpoint(udev, devinfo->data_out_pipe); | |
94d72f00 | 984 | usb_free_streams(devinfo->intf, eps, 3, GFP_NOIO); |
dae51546 SAS |
985 | } |
986 | ||
115bb1ff MW |
987 | static int uas_probe(struct usb_interface *intf, const struct usb_device_id *id) |
988 | { | |
6ce8213b HG |
989 | int result = -ENOMEM; |
990 | struct Scsi_Host *shost = NULL; | |
115bb1ff MW |
991 | struct uas_dev_info *devinfo; |
992 | struct usb_device *udev = interface_to_usbdev(intf); | |
a5011d44 | 993 | unsigned long dev_flags; |
115bb1ff | 994 | |
a5011d44 | 995 | if (!uas_use_uas_driver(intf, id, &dev_flags)) |
79b4c061 HG |
996 | return -ENODEV; |
997 | ||
89dc2905 MW |
998 | if (uas_switch_interface(udev, intf)) |
999 | return -ENODEV; | |
115bb1ff | 1000 | |
21fc05b6 HG |
1001 | shost = scsi_host_alloc(&uas_host_template, |
1002 | sizeof(struct uas_dev_info)); | |
115bb1ff | 1003 | if (!shost) |
6ce8213b | 1004 | goto set_alt0; |
115bb1ff MW |
1005 | |
1006 | shost->max_cmd_len = 16 + 252; | |
1007 | shost->max_id = 1; | |
bde027b4 GH |
1008 | shost->max_lun = 256; |
1009 | shost->max_channel = 0; | |
115bb1ff MW |
1010 | shost->sg_tablesize = udev->bus->sg_tablesize; |
1011 | ||
21fc05b6 | 1012 | devinfo = (struct uas_dev_info *)shost->hostdata; |
115bb1ff MW |
1013 | devinfo->intf = intf; |
1014 | devinfo->udev = udev; | |
023b515e | 1015 | devinfo->resetting = 0; |
da65c2bb | 1016 | devinfo->shutdown = 0; |
a5011d44 | 1017 | devinfo->flags = dev_flags; |
a0e39e34 | 1018 | init_usb_anchor(&devinfo->cmd_urbs); |
bdd000fb GH |
1019 | init_usb_anchor(&devinfo->sense_urbs); |
1020 | init_usb_anchor(&devinfo->data_urbs); | |
e0648520 | 1021 | spin_lock_init(&devinfo->lock); |
1bf8198e | 1022 | INIT_WORK(&devinfo->work, uas_do_work); |
3e99862c | 1023 | INIT_WORK(&devinfo->scan_work, uas_scan_work); |
58d51444 HG |
1024 | |
1025 | result = uas_configure_endpoints(devinfo); | |
1026 | if (result) | |
1027 | goto set_alt0; | |
115bb1ff | 1028 | |
198de51d HG |
1029 | /* |
1030 | * 1 tag is reserved for untagged commands + | |
1031 | * 1 tag to avoid off by one errors in some bridge firmwares | |
1032 | */ | |
1033 | shost->can_queue = devinfo->qdepth - 2; | |
1034 | ||
c637f1fa | 1035 | usb_set_intfdata(intf, shost); |
dae51546 SAS |
1036 | result = scsi_add_host(shost, &intf->dev); |
1037 | if (result) | |
6ce8213b | 1038 | goto free_streams; |
dae51546 | 1039 | |
3e99862c EH |
1040 | /* Submit the delayed_work for SCSI-device scanning */ |
1041 | schedule_work(&devinfo->scan_work); | |
1042 | ||
115bb1ff | 1043 | return result; |
dae51546 | 1044 | |
6ce8213b | 1045 | free_streams: |
dae51546 | 1046 | uas_free_streams(devinfo); |
c637f1fa | 1047 | usb_set_intfdata(intf, NULL); |
6ce8213b HG |
1048 | set_alt0: |
1049 | usb_set_interface(udev, intf->altsetting[0].desc.bInterfaceNumber, 0); | |
115bb1ff MW |
1050 | if (shost) |
1051 | scsi_host_put(shost); | |
1052 | return result; | |
1053 | } | |
1054 | ||
f9dc024a HG |
1055 | static int uas_cmnd_list_empty(struct uas_dev_info *devinfo) |
1056 | { | |
1057 | unsigned long flags; | |
1058 | int i, r = 1; | |
1059 | ||
1060 | spin_lock_irqsave(&devinfo->lock, flags); | |
1061 | ||
1062 | for (i = 0; i < devinfo->qdepth; i++) { | |
1063 | if (devinfo->cmnd[i]) { | |
1064 | r = 0; /* Not empty */ | |
1065 | break; | |
1066 | } | |
1067 | } | |
1068 | ||
1069 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
1070 | ||
1071 | return r; | |
1072 | } | |
1073 | ||
1074 | /* | |
1075 | * Wait for any pending cmnds to complete, on usb-2 sense_urbs may temporarily | |
1076 | * get empty while there still is more work to do due to sense-urbs completing | |
1077 | * with a READ/WRITE_READY iu code, so keep waiting until the list gets empty. | |
1078 | */ | |
1079 | static int uas_wait_for_pending_cmnds(struct uas_dev_info *devinfo) | |
1080 | { | |
1081 | unsigned long start_time; | |
1082 | int r; | |
1083 | ||
1084 | start_time = jiffies; | |
1085 | do { | |
1086 | flush_work(&devinfo->work); | |
1087 | ||
1088 | r = usb_wait_anchor_empty_timeout(&devinfo->sense_urbs, 5000); | |
1089 | if (r == 0) | |
1090 | return -ETIME; | |
1091 | ||
1092 | r = usb_wait_anchor_empty_timeout(&devinfo->data_urbs, 500); | |
1093 | if (r == 0) | |
1094 | return -ETIME; | |
1095 | ||
1096 | if (time_after(jiffies, start_time + 5 * HZ)) | |
1097 | return -ETIME; | |
1098 | } while (!uas_cmnd_list_empty(devinfo)); | |
1099 | ||
1100 | return 0; | |
1101 | } | |
1102 | ||
115bb1ff MW |
1103 | static int uas_pre_reset(struct usb_interface *intf) |
1104 | { | |
4de7a373 | 1105 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
21fc05b6 | 1106 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
4de7a373 HG |
1107 | unsigned long flags; |
1108 | ||
da65c2bb HG |
1109 | if (devinfo->shutdown) |
1110 | return 0; | |
1111 | ||
4de7a373 HG |
1112 | /* Block new requests */ |
1113 | spin_lock_irqsave(shost->host_lock, flags); | |
1114 | scsi_block_requests(shost); | |
1115 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1116 | ||
f9dc024a | 1117 | if (uas_wait_for_pending_cmnds(devinfo) != 0) { |
4de7a373 | 1118 | shost_printk(KERN_ERR, shost, "%s: timed out\n", __func__); |
f9dc024a | 1119 | scsi_unblock_requests(shost); |
4de7a373 HG |
1120 | return 1; |
1121 | } | |
1122 | ||
1123 | uas_free_streams(devinfo); | |
1124 | ||
115bb1ff MW |
1125 | return 0; |
1126 | } | |
1127 | ||
1128 | static int uas_post_reset(struct usb_interface *intf) | |
1129 | { | |
4de7a373 | 1130 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
21fc05b6 | 1131 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
4de7a373 | 1132 | unsigned long flags; |
ce39fe6f | 1133 | int err; |
4de7a373 | 1134 | |
da65c2bb HG |
1135 | if (devinfo->shutdown) |
1136 | return 0; | |
1137 | ||
ce39fe6f | 1138 | err = uas_configure_endpoints(devinfo); |
9a513c90 | 1139 | if (err && err != -ENODEV) |
58d51444 | 1140 | shost_printk(KERN_ERR, shost, |
ce39fe6f HG |
1141 | "%s: alloc streams error %d after reset", |
1142 | __func__, err); | |
4de7a373 | 1143 | |
cbeef22f | 1144 | /* we must unblock the host in every case lest we deadlock */ |
4de7a373 HG |
1145 | spin_lock_irqsave(shost->host_lock, flags); |
1146 | scsi_report_bus_reset(shost, 0); | |
1147 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1148 | ||
1149 | scsi_unblock_requests(shost); | |
1150 | ||
cbeef22f | 1151 | return err ? 1 : 0; |
115bb1ff MW |
1152 | } |
1153 | ||
0df1f663 HG |
1154 | static int uas_suspend(struct usb_interface *intf, pm_message_t message) |
1155 | { | |
1156 | struct Scsi_Host *shost = usb_get_intfdata(intf); | |
21fc05b6 | 1157 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
0df1f663 | 1158 | |
f9dc024a | 1159 | if (uas_wait_for_pending_cmnds(devinfo) != 0) { |
0df1f663 HG |
1160 | shost_printk(KERN_ERR, shost, "%s: timed out\n", __func__); |
1161 | return -ETIME; | |
1162 | } | |
1163 | ||
1164 | return 0; | |
1165 | } | |
1166 | ||
1167 | static int uas_resume(struct usb_interface *intf) | |
1168 | { | |
1169 | return 0; | |
1170 | } | |
1171 | ||
1172 | static int uas_reset_resume(struct usb_interface *intf) | |
1173 | { | |
1174 | struct Scsi_Host *shost = usb_get_intfdata(intf); | |
21fc05b6 | 1175 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
0df1f663 | 1176 | unsigned long flags; |
ce39fe6f | 1177 | int err; |
0df1f663 | 1178 | |
ce39fe6f HG |
1179 | err = uas_configure_endpoints(devinfo); |
1180 | if (err) { | |
0df1f663 | 1181 | shost_printk(KERN_ERR, shost, |
ce39fe6f HG |
1182 | "%s: alloc streams error %d after reset", |
1183 | __func__, err); | |
0df1f663 HG |
1184 | return -EIO; |
1185 | } | |
1186 | ||
1187 | spin_lock_irqsave(shost->host_lock, flags); | |
1188 | scsi_report_bus_reset(shost, 0); | |
1189 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1190 | ||
1191 | return 0; | |
1192 | } | |
1193 | ||
115bb1ff MW |
1194 | static void uas_disconnect(struct usb_interface *intf) |
1195 | { | |
115bb1ff | 1196 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
21fc05b6 | 1197 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
b7b5d11f | 1198 | unsigned long flags; |
115bb1ff | 1199 | |
b7b5d11f | 1200 | spin_lock_irqsave(&devinfo->lock, flags); |
4c456971 | 1201 | devinfo->resetting = 1; |
b7b5d11f HG |
1202 | spin_unlock_irqrestore(&devinfo->lock, flags); |
1203 | ||
1bf8198e | 1204 | cancel_work_sync(&devinfo->work); |
a0e39e34 | 1205 | usb_kill_anchored_urbs(&devinfo->cmd_urbs); |
bdd000fb GH |
1206 | usb_kill_anchored_urbs(&devinfo->sense_urbs); |
1207 | usb_kill_anchored_urbs(&devinfo->data_urbs); | |
1589349f HG |
1208 | uas_zap_pending(devinfo, DID_NO_CONNECT); |
1209 | ||
3e99862c EH |
1210 | /* |
1211 | * Prevent SCSI scanning (if it hasn't started yet) | |
1212 | * or wait for the SCSI-scanning routine to stop. | |
1213 | */ | |
1214 | cancel_work_sync(&devinfo->scan_work); | |
1215 | ||
4c456971 | 1216 | scsi_remove_host(shost); |
dae51546 | 1217 | uas_free_streams(devinfo); |
21fc05b6 | 1218 | scsi_host_put(shost); |
115bb1ff MW |
1219 | } |
1220 | ||
da65c2bb HG |
1221 | /* |
1222 | * Put the device back in usb-storage mode on shutdown, as some BIOS-es | |
1223 | * hang on reboot when the device is still in uas mode. Note the reset is | |
1224 | * necessary as some devices won't revert to usb-storage mode without it. | |
1225 | */ | |
1226 | static void uas_shutdown(struct device *dev) | |
1227 | { | |
1228 | struct usb_interface *intf = to_usb_interface(dev); | |
1229 | struct usb_device *udev = interface_to_usbdev(intf); | |
1230 | struct Scsi_Host *shost = usb_get_intfdata(intf); | |
21fc05b6 | 1231 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
da65c2bb HG |
1232 | |
1233 | if (system_state != SYSTEM_RESTART) | |
1234 | return; | |
1235 | ||
1236 | devinfo->shutdown = 1; | |
1237 | uas_free_streams(devinfo); | |
1238 | usb_set_interface(udev, intf->altsetting[0].desc.bInterfaceNumber, 0); | |
1239 | usb_reset_device(udev); | |
1240 | } | |
1241 | ||
115bb1ff MW |
1242 | static struct usb_driver uas_driver = { |
1243 | .name = "uas", | |
1244 | .probe = uas_probe, | |
1245 | .disconnect = uas_disconnect, | |
1246 | .pre_reset = uas_pre_reset, | |
1247 | .post_reset = uas_post_reset, | |
0df1f663 HG |
1248 | .suspend = uas_suspend, |
1249 | .resume = uas_resume, | |
1250 | .reset_resume = uas_reset_resume, | |
da65c2bb | 1251 | .drvwrap.driver.shutdown = uas_shutdown, |
115bb1ff MW |
1252 | .id_table = uas_usb_ids, |
1253 | }; | |
1254 | ||
f6cc6093 ON |
1255 | static int __init uas_init(void) |
1256 | { | |
1257 | int rv; | |
1258 | ||
1259 | workqueue = alloc_workqueue("uas", WQ_MEM_RECLAIM, 0); | |
1260 | if (!workqueue) | |
1261 | return -ENOMEM; | |
1262 | ||
1263 | rv = usb_register(&uas_driver); | |
1264 | if (rv) { | |
1265 | destroy_workqueue(workqueue); | |
1266 | return -ENOMEM; | |
1267 | } | |
1268 | ||
1269 | return 0; | |
1270 | } | |
1271 | ||
1272 | static void __exit uas_exit(void) | |
1273 | { | |
1274 | usb_deregister(&uas_driver); | |
1275 | destroy_workqueue(workqueue); | |
1276 | } | |
1277 | ||
1278 | module_init(uas_init); | |
1279 | module_exit(uas_exit); | |
115bb1ff MW |
1280 | |
1281 | MODULE_LICENSE("GPL"); | |
32bca2df | 1282 | MODULE_IMPORT_NS(USB_STORAGE); |
f50a4968 HG |
1283 | MODULE_AUTHOR( |
1284 | "Hans de Goede <hdegoede@redhat.com>, Matthew Wilcox and Sarah Sharp"); |