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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; |
115bb1ff MW |
48 | }; |
49 | ||
50 | enum { | |
76433194 ON |
51 | SUBMIT_STATUS_URB = BIT(1), |
52 | ALLOC_DATA_IN_URB = BIT(2), | |
53 | SUBMIT_DATA_IN_URB = BIT(3), | |
54 | ALLOC_DATA_OUT_URB = BIT(4), | |
55 | SUBMIT_DATA_OUT_URB = BIT(5), | |
56 | ALLOC_CMD_URB = BIT(6), | |
57 | SUBMIT_CMD_URB = BIT(7), | |
58 | COMMAND_INFLIGHT = BIT(8), | |
59 | DATA_IN_URB_INFLIGHT = BIT(9), | |
60 | DATA_OUT_URB_INFLIGHT = BIT(10), | |
61 | COMMAND_ABORTED = BIT(11), | |
62 | IS_IN_WORK_LIST = BIT(12), | |
115bb1ff MW |
63 | }; |
64 | ||
65 | /* Overrides scsi_pointer */ | |
66 | struct uas_cmd_info { | |
67 | unsigned int state; | |
e28e2f2f | 68 | unsigned int uas_tag; |
115bb1ff | 69 | struct urb *cmd_urb; |
115bb1ff MW |
70 | struct urb *data_in_urb; |
71 | struct urb *data_out_urb; | |
115bb1ff MW |
72 | }; |
73 | ||
74 | /* I hate forward declarations, but I actually have a loop */ | |
75 | static int uas_submit_urbs(struct scsi_cmnd *cmnd, | |
b36d8391 | 76 | struct uas_dev_info *devinfo); |
ea9da1c7 | 77 | static void uas_do_work(struct work_struct *work); |
4c456971 | 78 | static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller); |
d89bd835 | 79 | static void uas_free_streams(struct uas_dev_info *devinfo); |
1ad7ed5a HG |
80 | static void uas_log_cmd_state(struct scsi_cmnd *cmnd, const char *prefix, |
81 | int status); | |
aa8f6123 | 82 | |
115bb1ff MW |
83 | static void uas_do_work(struct work_struct *work) |
84 | { | |
1bf8198e GH |
85 | struct uas_dev_info *devinfo = |
86 | container_of(work, struct uas_dev_info, work); | |
115bb1ff | 87 | struct uas_cmd_info *cmdinfo; |
43cd99cb | 88 | struct scsi_cmnd *cmnd; |
e0648520 | 89 | unsigned long flags; |
43cd99cb | 90 | int i, err; |
115bb1ff | 91 | |
1bf8198e | 92 | spin_lock_irqsave(&devinfo->lock, flags); |
b7b5d11f HG |
93 | |
94 | if (devinfo->resetting) | |
95 | goto out; | |
96 | ||
43cd99cb HG |
97 | for (i = 0; i < devinfo->qdepth; i++) { |
98 | if (!devinfo->cmnd[i]) | |
99 | continue; | |
100 | ||
101 | cmnd = devinfo->cmnd[i]; | |
102 | cmdinfo = (void *)&cmnd->SCp; | |
61c09ce5 HG |
103 | |
104 | if (!(cmdinfo->state & IS_IN_WORK_LIST)) | |
105 | continue; | |
106 | ||
b36d8391 | 107 | err = uas_submit_urbs(cmnd, cmnd->device->hostdata); |
61c09ce5 | 108 | if (!err) |
efefecf3 | 109 | cmdinfo->state &= ~IS_IN_WORK_LIST; |
61c09ce5 | 110 | else |
1bf8198e | 111 | schedule_work(&devinfo->work); |
115bb1ff | 112 | } |
b7b5d11f | 113 | out: |
4c456971 GH |
114 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115 | } | |
116 | ||
1bf8198e GH |
117 | static void uas_add_work(struct uas_cmd_info *cmdinfo) |
118 | { | |
119 | struct scsi_pointer *scp = (void *)cmdinfo; | |
120 | struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, SCp); | |
121 | struct uas_dev_info *devinfo = cmnd->device->hostdata; | |
122 | ||
ab945eff | 123 | lockdep_assert_held(&devinfo->lock); |
1bf8198e GH |
124 | cmdinfo->state |= IS_IN_WORK_LIST; |
125 | schedule_work(&devinfo->work); | |
126 | } | |
127 | ||
1589349f | 128 | static void uas_zap_pending(struct uas_dev_info *devinfo, int result) |
326349f8 GH |
129 | { |
130 | struct uas_cmd_info *cmdinfo; | |
43cd99cb | 131 | struct scsi_cmnd *cmnd; |
326349f8 | 132 | unsigned long flags; |
43cd99cb | 133 | int i, err; |
326349f8 GH |
134 | |
135 | spin_lock_irqsave(&devinfo->lock, flags); | |
43cd99cb HG |
136 | for (i = 0; i < devinfo->qdepth; i++) { |
137 | if (!devinfo->cmnd[i]) | |
138 | continue; | |
139 | ||
140 | cmnd = devinfo->cmnd[i]; | |
141 | cmdinfo = (void *)&cmnd->SCp; | |
1ad7ed5a | 142 | uas_log_cmd_state(cmnd, __func__, 0); |
9c15c573 HG |
143 | /* Sense urbs were killed, clear COMMAND_INFLIGHT manually */ |
144 | cmdinfo->state &= ~COMMAND_INFLIGHT; | |
1589349f | 145 | cmnd->result = result << 16; |
9c15c573 HG |
146 | err = uas_try_complete(cmnd, __func__); |
147 | WARN_ON(err != 0); | |
326349f8 GH |
148 | } |
149 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
150 | } | |
151 | ||
115bb1ff MW |
152 | static void uas_sense(struct urb *urb, struct scsi_cmnd *cmnd) |
153 | { | |
154 | struct sense_iu *sense_iu = urb->transfer_buffer; | |
155 | struct scsi_device *sdev = cmnd->device; | |
156 | ||
157 | if (urb->actual_length > 16) { | |
158 | unsigned len = be16_to_cpup(&sense_iu->len); | |
159 | if (len + 16 != urb->actual_length) { | |
160 | int newlen = min(len + 16, urb->actual_length) - 16; | |
161 | if (newlen < 0) | |
162 | newlen = 0; | |
163 | sdev_printk(KERN_INFO, sdev, "%s: urb length %d " | |
164 | "disagrees with IU sense data length %d, " | |
165 | "using %d bytes of sense data\n", __func__, | |
166 | urb->actual_length, len, newlen); | |
167 | len = newlen; | |
168 | } | |
169 | memcpy(cmnd->sense_buffer, sense_iu->sense, len); | |
170 | } | |
171 | ||
172 | cmnd->result = sense_iu->status; | |
115bb1ff MW |
173 | } |
174 | ||
1ad7ed5a HG |
175 | static void uas_log_cmd_state(struct scsi_cmnd *cmnd, const char *prefix, |
176 | int status) | |
b1d67693 GH |
177 | { |
178 | struct uas_cmd_info *ci = (void *)&cmnd->SCp; | |
e28e2f2f | 179 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; |
b1d67693 | 180 | |
60d9f67d | 181 | scmd_printk(KERN_INFO, cmnd, |
e28e2f2f HG |
182 | "%s %d uas-tag %d inflight:%s%s%s%s%s%s%s%s%s%s%s%s ", |
183 | prefix, status, cmdinfo->uas_tag, | |
b1d67693 GH |
184 | (ci->state & SUBMIT_STATUS_URB) ? " s-st" : "", |
185 | (ci->state & ALLOC_DATA_IN_URB) ? " a-in" : "", | |
186 | (ci->state & SUBMIT_DATA_IN_URB) ? " s-in" : "", | |
187 | (ci->state & ALLOC_DATA_OUT_URB) ? " a-out" : "", | |
188 | (ci->state & SUBMIT_DATA_OUT_URB) ? " s-out" : "", | |
189 | (ci->state & ALLOC_CMD_URB) ? " a-cmd" : "", | |
190 | (ci->state & SUBMIT_CMD_URB) ? " s-cmd" : "", | |
191 | (ci->state & COMMAND_INFLIGHT) ? " CMD" : "", | |
192 | (ci->state & DATA_IN_URB_INFLIGHT) ? " IN" : "", | |
193 | (ci->state & DATA_OUT_URB_INFLIGHT) ? " OUT" : "", | |
b06e48af | 194 | (ci->state & COMMAND_ABORTED) ? " abort" : "", |
efefecf3 | 195 | (ci->state & IS_IN_WORK_LIST) ? " work" : ""); |
6dcd8ec2 | 196 | scsi_print_command(cmnd); |
b1d67693 GH |
197 | } |
198 | ||
4c5481ef HG |
199 | static void uas_free_unsubmitted_urbs(struct scsi_cmnd *cmnd) |
200 | { | |
201 | struct uas_cmd_info *cmdinfo; | |
202 | ||
203 | if (!cmnd) | |
204 | return; | |
205 | ||
206 | cmdinfo = (void *)&cmnd->SCp; | |
207 | ||
208 | if (cmdinfo->state & SUBMIT_CMD_URB) | |
209 | usb_free_urb(cmdinfo->cmd_urb); | |
210 | ||
211 | /* data urbs may have never gotten their submit flag set */ | |
212 | if (!(cmdinfo->state & DATA_IN_URB_INFLIGHT)) | |
213 | usb_free_urb(cmdinfo->data_in_urb); | |
214 | if (!(cmdinfo->state & DATA_OUT_URB_INFLIGHT)) | |
215 | usb_free_urb(cmdinfo->data_out_urb); | |
b1d67693 GH |
216 | } |
217 | ||
218 | static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller) | |
219 | { | |
220 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
e0648520 | 221 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
b1d67693 | 222 | |
ab945eff | 223 | lockdep_assert_held(&devinfo->lock); |
b1d67693 GH |
224 | if (cmdinfo->state & (COMMAND_INFLIGHT | |
225 | DATA_IN_URB_INFLIGHT | | |
b06e48af | 226 | DATA_OUT_URB_INFLIGHT | |
616f0e6c | 227 | COMMAND_ABORTED)) |
b1d67693 | 228 | return -EBUSY; |
e28e2f2f | 229 | devinfo->cmnd[cmdinfo->uas_tag - 1] = NULL; |
4c5481ef | 230 | uas_free_unsubmitted_urbs(cmnd); |
c621a81e | 231 | cmnd->scsi_done(cmnd); |
b1d67693 | 232 | return 0; |
115bb1ff MW |
233 | } |
234 | ||
235 | static void uas_xfer_data(struct urb *urb, struct scsi_cmnd *cmnd, | |
b1d67693 | 236 | unsigned direction) |
115bb1ff MW |
237 | { |
238 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
239 | int err; | |
240 | ||
b1d67693 | 241 | cmdinfo->state |= direction | SUBMIT_STATUS_URB; |
b36d8391 | 242 | err = uas_submit_urbs(cmnd, cmnd->device->hostdata); |
115bb1ff | 243 | if (err) { |
1bf8198e | 244 | uas_add_work(cmdinfo); |
115bb1ff MW |
245 | } |
246 | } | |
247 | ||
aa742683 ON |
248 | static bool uas_evaluate_response_iu(struct response_iu *riu, struct scsi_cmnd *cmnd) |
249 | { | |
250 | u8 response_code = riu->response_code; | |
251 | ||
252 | switch (response_code) { | |
253 | case RC_INCORRECT_LUN: | |
254 | cmnd->result = DID_BAD_TARGET << 16; | |
255 | break; | |
256 | case RC_TMF_SUCCEEDED: | |
257 | cmnd->result = DID_OK << 16; | |
258 | break; | |
259 | case RC_TMF_NOT_SUPPORTED: | |
260 | cmnd->result = DID_TARGET_FAILURE << 16; | |
261 | break; | |
262 | default: | |
263 | uas_log_cmd_state(cmnd, "response iu", response_code); | |
264 | cmnd->result = DID_ERROR << 16; | |
265 | break; | |
266 | } | |
267 | ||
268 | return response_code == RC_TMF_SUCCEEDED; | |
269 | } | |
270 | ||
115bb1ff MW |
271 | static void uas_stat_cmplt(struct urb *urb) |
272 | { | |
273 | struct iu *iu = urb->transfer_buffer; | |
22188f4a | 274 | struct Scsi_Host *shost = urb->context; |
21fc05b6 | 275 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
60d9f67d HG |
276 | struct urb *data_in_urb = NULL; |
277 | struct urb *data_out_urb = NULL; | |
115bb1ff | 278 | struct scsi_cmnd *cmnd; |
b1d67693 | 279 | struct uas_cmd_info *cmdinfo; |
e0648520 | 280 | unsigned long flags; |
5e61aede | 281 | unsigned int idx; |
cca26be3 | 282 | int status = urb->status; |
aa742683 | 283 | bool success; |
115bb1ff | 284 | |
b7b5d11f HG |
285 | spin_lock_irqsave(&devinfo->lock, flags); |
286 | ||
287 | if (devinfo->resetting) | |
288 | goto out; | |
115bb1ff | 289 | |
cca26be3 ON |
290 | if (status) { |
291 | if (status != -ENOENT && status != -ECONNRESET && status != -ESHUTDOWN) | |
292 | dev_err(&urb->dev->dev, "stat urb: status %d\n", status); | |
b7b5d11f | 293 | goto out; |
115bb1ff MW |
294 | } |
295 | ||
5e61aede HG |
296 | idx = be16_to_cpup(&iu->tag) - 1; |
297 | if (idx >= MAX_CMNDS || !devinfo->cmnd[idx]) { | |
298 | dev_err(&urb->dev->dev, | |
e28e2f2f | 299 | "stat urb: no pending cmd for uas-tag %d\n", idx + 1); |
b7b5d11f | 300 | goto out; |
023b515e GH |
301 | } |
302 | ||
5e61aede | 303 | cmnd = devinfo->cmnd[idx]; |
e0423dee | 304 | cmdinfo = (void *)&cmnd->SCp; |
d89da03a HG |
305 | |
306 | if (!(cmdinfo->state & COMMAND_INFLIGHT)) { | |
1ad7ed5a | 307 | uas_log_cmd_state(cmnd, "unexpected status cmplt", 0); |
d89da03a | 308 | goto out; |
96c1eb98 | 309 | } |
115bb1ff MW |
310 | |
311 | switch (iu->iu_id) { | |
312 | case IU_ID_STATUS: | |
5ad22cfc | 313 | uas_sense(urb, cmnd); |
8aac863e GH |
314 | if (cmnd->result != 0) { |
315 | /* cancel data transfers on error */ | |
60d9f67d HG |
316 | data_in_urb = usb_get_urb(cmdinfo->data_in_urb); |
317 | data_out_urb = usb_get_urb(cmdinfo->data_out_urb); | |
8aac863e | 318 | } |
b1d67693 GH |
319 | cmdinfo->state &= ~COMMAND_INFLIGHT; |
320 | uas_try_complete(cmnd, __func__); | |
115bb1ff MW |
321 | break; |
322 | case IU_ID_READ_READY: | |
8e453155 HG |
323 | if (!cmdinfo->data_in_urb || |
324 | (cmdinfo->state & DATA_IN_URB_INFLIGHT)) { | |
1ad7ed5a | 325 | uas_log_cmd_state(cmnd, "unexpected read rdy", 0); |
8e453155 HG |
326 | break; |
327 | } | |
115bb1ff MW |
328 | uas_xfer_data(urb, cmnd, SUBMIT_DATA_IN_URB); |
329 | break; | |
330 | case IU_ID_WRITE_READY: | |
8e453155 HG |
331 | if (!cmdinfo->data_out_urb || |
332 | (cmdinfo->state & DATA_OUT_URB_INFLIGHT)) { | |
1ad7ed5a | 333 | uas_log_cmd_state(cmnd, "unexpected write rdy", 0); |
8e453155 HG |
334 | break; |
335 | } | |
115bb1ff MW |
336 | uas_xfer_data(urb, cmnd, SUBMIT_DATA_OUT_URB); |
337 | break; | |
fac1f485 | 338 | case IU_ID_RESPONSE: |
fac1f485 | 339 | cmdinfo->state &= ~COMMAND_INFLIGHT; |
aa742683 ON |
340 | success = uas_evaluate_response_iu((struct response_iu *)iu, cmnd); |
341 | if (!success) { | |
342 | /* Error, cancel data transfers */ | |
343 | data_in_urb = usb_get_urb(cmdinfo->data_in_urb); | |
344 | data_out_urb = usb_get_urb(cmdinfo->data_out_urb); | |
345 | } | |
fac1f485 HG |
346 | uas_try_complete(cmnd, __func__); |
347 | break; | |
115bb1ff | 348 | default: |
1ad7ed5a | 349 | uas_log_cmd_state(cmnd, "bogus IU", iu->iu_id); |
115bb1ff | 350 | } |
b7b5d11f | 351 | out: |
e9bd7e1a | 352 | usb_free_urb(urb); |
e0648520 | 353 | spin_unlock_irqrestore(&devinfo->lock, flags); |
60d9f67d HG |
354 | |
355 | /* Unlinking of data urbs must be done without holding the lock */ | |
356 | if (data_in_urb) { | |
357 | usb_unlink_urb(data_in_urb); | |
358 | usb_put_urb(data_in_urb); | |
359 | } | |
360 | if (data_out_urb) { | |
361 | usb_unlink_urb(data_out_urb); | |
362 | usb_put_urb(data_out_urb); | |
363 | } | |
115bb1ff MW |
364 | } |
365 | ||
c621a81e | 366 | static void uas_data_cmplt(struct urb *urb) |
115bb1ff | 367 | { |
b1d67693 GH |
368 | struct scsi_cmnd *cmnd = urb->context; |
369 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
e0648520 | 370 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
ae3d56d8 | 371 | struct scsi_data_buffer *sdb = &cmnd->sdb; |
e0648520 | 372 | unsigned long flags; |
cca26be3 | 373 | int status = urb->status; |
b1d67693 | 374 | |
e0648520 | 375 | spin_lock_irqsave(&devinfo->lock, flags); |
b7b5d11f | 376 | |
b1d67693 | 377 | if (cmdinfo->data_in_urb == urb) { |
b1d67693 | 378 | cmdinfo->state &= ~DATA_IN_URB_INFLIGHT; |
85fea825 | 379 | cmdinfo->data_in_urb = NULL; |
b1d67693 | 380 | } else if (cmdinfo->data_out_urb == urb) { |
b1d67693 | 381 | cmdinfo->state &= ~DATA_OUT_URB_INFLIGHT; |
85fea825 | 382 | cmdinfo->data_out_urb = NULL; |
b1d67693 | 383 | } |
b7b5d11f HG |
384 | |
385 | if (devinfo->resetting) | |
386 | goto out; | |
387 | ||
d89da03a HG |
388 | /* Data urbs should not complete before the cmd urb is submitted */ |
389 | if (cmdinfo->state & SUBMIT_CMD_URB) { | |
1ad7ed5a | 390 | uas_log_cmd_state(cmnd, "unexpected data cmplt", 0); |
d89da03a HG |
391 | goto out; |
392 | } | |
393 | ||
cca26be3 ON |
394 | if (status) { |
395 | if (status != -ENOENT && status != -ECONNRESET && status != -ESHUTDOWN) | |
396 | uas_log_cmd_state(cmnd, "data cmplt err", status); | |
8aac863e | 397 | /* error: no data transfered */ |
229531be | 398 | scsi_set_resid(cmnd, sdb->length); |
8aac863e | 399 | } else { |
229531be | 400 | scsi_set_resid(cmnd, sdb->length - urb->actual_length); |
8aac863e | 401 | } |
b1d67693 | 402 | uas_try_complete(cmnd, __func__); |
b7b5d11f | 403 | out: |
85fea825 | 404 | usb_free_urb(urb); |
e0648520 | 405 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
406 | } |
407 | ||
876285cc HG |
408 | static void uas_cmd_cmplt(struct urb *urb) |
409 | { | |
b6823c51 HG |
410 | if (urb->status) |
411 | dev_err(&urb->dev->dev, "cmd cmplt err %d\n", urb->status); | |
876285cc | 412 | |
876285cc HG |
413 | usb_free_urb(urb); |
414 | } | |
415 | ||
115bb1ff | 416 | static struct urb *uas_alloc_data_urb(struct uas_dev_info *devinfo, gfp_t gfp, |
b1d67693 GH |
417 | struct scsi_cmnd *cmnd, |
418 | enum dma_data_direction dir) | |
115bb1ff MW |
419 | { |
420 | struct usb_device *udev = devinfo->udev; | |
2d75b9cb | 421 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; |
115bb1ff | 422 | struct urb *urb = usb_alloc_urb(0, gfp); |
ae3d56d8 | 423 | struct scsi_data_buffer *sdb = &cmnd->sdb; |
2d75b9cb HG |
424 | unsigned int pipe = (dir == DMA_FROM_DEVICE) |
425 | ? devinfo->data_in_pipe : devinfo->data_out_pipe; | |
115bb1ff MW |
426 | |
427 | if (!urb) | |
428 | goto out; | |
b1d67693 GH |
429 | usb_fill_bulk_urb(urb, udev, pipe, NULL, sdb->length, |
430 | uas_data_cmplt, cmnd); | |
e28e2f2f HG |
431 | if (devinfo->use_streams) |
432 | urb->stream_id = cmdinfo->uas_tag; | |
115bb1ff MW |
433 | urb->num_sgs = udev->bus->sg_tablesize ? sdb->table.nents : 0; |
434 | urb->sg = sdb->table.sgl; | |
435 | out: | |
436 | return urb; | |
437 | } | |
438 | ||
439 | static struct urb *uas_alloc_sense_urb(struct uas_dev_info *devinfo, gfp_t gfp, | |
2d75b9cb | 440 | struct scsi_cmnd *cmnd) |
115bb1ff MW |
441 | { |
442 | struct usb_device *udev = devinfo->udev; | |
2d75b9cb | 443 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; |
115bb1ff MW |
444 | struct urb *urb = usb_alloc_urb(0, gfp); |
445 | struct sense_iu *iu; | |
446 | ||
447 | if (!urb) | |
448 | goto out; | |
449 | ||
ac563cfd | 450 | iu = kzalloc(sizeof(*iu), gfp); |
115bb1ff MW |
451 | if (!iu) |
452 | goto free; | |
453 | ||
454 | usb_fill_bulk_urb(urb, udev, devinfo->status_pipe, iu, sizeof(*iu), | |
2d75b9cb | 455 | uas_stat_cmplt, cmnd->device->host); |
e28e2f2f HG |
456 | if (devinfo->use_streams) |
457 | urb->stream_id = cmdinfo->uas_tag; | |
115bb1ff MW |
458 | urb->transfer_flags |= URB_FREE_BUFFER; |
459 | out: | |
460 | return urb; | |
461 | free: | |
462 | usb_free_urb(urb); | |
463 | return NULL; | |
464 | } | |
465 | ||
466 | static struct urb *uas_alloc_cmd_urb(struct uas_dev_info *devinfo, gfp_t gfp, | |
a887cd36 | 467 | struct scsi_cmnd *cmnd) |
115bb1ff MW |
468 | { |
469 | struct usb_device *udev = devinfo->udev; | |
470 | struct scsi_device *sdev = cmnd->device; | |
e28e2f2f | 471 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; |
115bb1ff MW |
472 | struct urb *urb = usb_alloc_urb(0, gfp); |
473 | struct command_iu *iu; | |
474 | int len; | |
475 | ||
476 | if (!urb) | |
477 | goto out; | |
478 | ||
479 | len = cmnd->cmd_len - 16; | |
480 | if (len < 0) | |
481 | len = 0; | |
482 | len = ALIGN(len, 4); | |
ac563cfd | 483 | iu = kzalloc(sizeof(*iu) + len, gfp); |
115bb1ff MW |
484 | if (!iu) |
485 | goto free; | |
486 | ||
487 | iu->iu_id = IU_ID_COMMAND; | |
e28e2f2f | 488 | iu->tag = cpu_to_be16(cmdinfo->uas_tag); |
02e031cb | 489 | iu->prio_attr = UAS_SIMPLE_TAG; |
115bb1ff MW |
490 | iu->len = len; |
491 | int_to_scsilun(sdev->lun, &iu->lun); | |
492 | memcpy(iu->cdb, cmnd->cmnd, cmnd->cmd_len); | |
493 | ||
494 | usb_fill_bulk_urb(urb, udev, devinfo->cmd_pipe, iu, sizeof(*iu) + len, | |
b6823c51 | 495 | uas_cmd_cmplt, NULL); |
115bb1ff MW |
496 | urb->transfer_flags |= URB_FREE_BUFFER; |
497 | out: | |
498 | return urb; | |
499 | free: | |
500 | usb_free_urb(urb); | |
501 | return NULL; | |
502 | } | |
503 | ||
504 | /* | |
505 | * Why should I request the Status IU before sending the Command IU? Spec | |
506 | * says to, but also says the device may receive them in any order. Seems | |
507 | * daft to me. | |
508 | */ | |
509 | ||
2d75b9cb | 510 | static struct urb *uas_submit_sense_urb(struct scsi_cmnd *cmnd, gfp_t gfp) |
115bb1ff | 511 | { |
2d75b9cb | 512 | struct uas_dev_info *devinfo = cmnd->device->hostdata; |
e9bd7e1a | 513 | struct urb *urb; |
876285cc | 514 | int err; |
115bb1ff | 515 | |
2d75b9cb | 516 | urb = uas_alloc_sense_urb(devinfo, gfp, cmnd); |
e9bd7e1a | 517 | if (!urb) |
70cf0fba | 518 | return NULL; |
d5f808d3 | 519 | usb_anchor_urb(urb, &devinfo->sense_urbs); |
876285cc HG |
520 | err = usb_submit_urb(urb, gfp); |
521 | if (err) { | |
d5f808d3 | 522 | usb_unanchor_urb(urb); |
1ad7ed5a | 523 | uas_log_cmd_state(cmnd, "sense submit err", err); |
e9bd7e1a | 524 | usb_free_urb(urb); |
70cf0fba | 525 | return NULL; |
115bb1ff | 526 | } |
70cf0fba | 527 | return urb; |
e9bd7e1a GH |
528 | } |
529 | ||
530 | static int uas_submit_urbs(struct scsi_cmnd *cmnd, | |
b36d8391 | 531 | struct uas_dev_info *devinfo) |
e9bd7e1a GH |
532 | { |
533 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
70cf0fba | 534 | struct urb *urb; |
876285cc | 535 | int err; |
115bb1ff | 536 | |
ab945eff | 537 | lockdep_assert_held(&devinfo->lock); |
92a3f767 | 538 | if (cmdinfo->state & SUBMIT_STATUS_URB) { |
b36d8391 | 539 | urb = uas_submit_sense_urb(cmnd, GFP_ATOMIC); |
70cf0fba HG |
540 | if (!urb) |
541 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
92a3f767 | 542 | cmdinfo->state &= ~SUBMIT_STATUS_URB; |
115bb1ff MW |
543 | } |
544 | ||
545 | if (cmdinfo->state & ALLOC_DATA_IN_URB) { | |
b36d8391 | 546 | cmdinfo->data_in_urb = uas_alloc_data_urb(devinfo, GFP_ATOMIC, |
2d75b9cb | 547 | cmnd, DMA_FROM_DEVICE); |
115bb1ff MW |
548 | if (!cmdinfo->data_in_urb) |
549 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
550 | cmdinfo->state &= ~ALLOC_DATA_IN_URB; | |
551 | } | |
552 | ||
553 | if (cmdinfo->state & SUBMIT_DATA_IN_URB) { | |
d5f808d3 | 554 | usb_anchor_urb(cmdinfo->data_in_urb, &devinfo->data_urbs); |
b36d8391 | 555 | err = usb_submit_urb(cmdinfo->data_in_urb, GFP_ATOMIC); |
876285cc | 556 | if (err) { |
d5f808d3 | 557 | usb_unanchor_urb(cmdinfo->data_in_urb); |
1ad7ed5a | 558 | uas_log_cmd_state(cmnd, "data in submit err", err); |
115bb1ff MW |
559 | return SCSI_MLQUEUE_DEVICE_BUSY; |
560 | } | |
561 | cmdinfo->state &= ~SUBMIT_DATA_IN_URB; | |
b1d67693 | 562 | cmdinfo->state |= DATA_IN_URB_INFLIGHT; |
115bb1ff MW |
563 | } |
564 | ||
565 | if (cmdinfo->state & ALLOC_DATA_OUT_URB) { | |
b36d8391 | 566 | cmdinfo->data_out_urb = uas_alloc_data_urb(devinfo, GFP_ATOMIC, |
2d75b9cb | 567 | cmnd, DMA_TO_DEVICE); |
115bb1ff MW |
568 | if (!cmdinfo->data_out_urb) |
569 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
570 | cmdinfo->state &= ~ALLOC_DATA_OUT_URB; | |
571 | } | |
572 | ||
573 | if (cmdinfo->state & SUBMIT_DATA_OUT_URB) { | |
d5f808d3 | 574 | usb_anchor_urb(cmdinfo->data_out_urb, &devinfo->data_urbs); |
b36d8391 | 575 | err = usb_submit_urb(cmdinfo->data_out_urb, GFP_ATOMIC); |
876285cc | 576 | if (err) { |
d5f808d3 | 577 | usb_unanchor_urb(cmdinfo->data_out_urb); |
1ad7ed5a | 578 | uas_log_cmd_state(cmnd, "data out submit err", err); |
115bb1ff MW |
579 | return SCSI_MLQUEUE_DEVICE_BUSY; |
580 | } | |
581 | cmdinfo->state &= ~SUBMIT_DATA_OUT_URB; | |
b1d67693 | 582 | cmdinfo->state |= DATA_OUT_URB_INFLIGHT; |
115bb1ff MW |
583 | } |
584 | ||
585 | if (cmdinfo->state & ALLOC_CMD_URB) { | |
b36d8391 | 586 | cmdinfo->cmd_urb = uas_alloc_cmd_urb(devinfo, GFP_ATOMIC, cmnd); |
115bb1ff MW |
587 | if (!cmdinfo->cmd_urb) |
588 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
589 | cmdinfo->state &= ~ALLOC_CMD_URB; | |
590 | } | |
591 | ||
592 | if (cmdinfo->state & SUBMIT_CMD_URB) { | |
d5f808d3 | 593 | usb_anchor_urb(cmdinfo->cmd_urb, &devinfo->cmd_urbs); |
b36d8391 | 594 | err = usb_submit_urb(cmdinfo->cmd_urb, GFP_ATOMIC); |
876285cc | 595 | if (err) { |
d5f808d3 | 596 | usb_unanchor_urb(cmdinfo->cmd_urb); |
1ad7ed5a | 597 | uas_log_cmd_state(cmnd, "cmd submit err", err); |
115bb1ff MW |
598 | return SCSI_MLQUEUE_DEVICE_BUSY; |
599 | } | |
a0e39e34 | 600 | cmdinfo->cmd_urb = NULL; |
115bb1ff | 601 | cmdinfo->state &= ~SUBMIT_CMD_URB; |
b1d67693 | 602 | cmdinfo->state |= COMMAND_INFLIGHT; |
115bb1ff MW |
603 | } |
604 | ||
605 | return 0; | |
606 | } | |
607 | ||
f281233d | 608 | static int uas_queuecommand_lck(struct scsi_cmnd *cmnd, |
115bb1ff MW |
609 | void (*done)(struct scsi_cmnd *)) |
610 | { | |
611 | struct scsi_device *sdev = cmnd->device; | |
612 | struct uas_dev_info *devinfo = sdev->hostdata; | |
613 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
e0648520 | 614 | unsigned long flags; |
e28e2f2f | 615 | int idx, err; |
115bb1ff MW |
616 | |
617 | BUILD_BUG_ON(sizeof(struct uas_cmd_info) > sizeof(struct scsi_pointer)); | |
618 | ||
f9dc024a HG |
619 | /* Re-check scsi_block_requests now that we've the host-lock */ |
620 | if (cmnd->device->host->host_self_blocked) | |
621 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
622 | ||
59307852 HG |
623 | if ((devinfo->flags & US_FL_NO_ATA_1X) && |
624 | (cmnd->cmnd[0] == ATA_12 || cmnd->cmnd[0] == ATA_16)) { | |
625 | memcpy(cmnd->sense_buffer, usb_stor_sense_invalidCDB, | |
626 | sizeof(usb_stor_sense_invalidCDB)); | |
627 | cmnd->result = SAM_STAT_CHECK_CONDITION; | |
628 | cmnd->scsi_done(cmnd); | |
629 | return 0; | |
630 | } | |
631 | ||
c6f63207 HG |
632 | spin_lock_irqsave(&devinfo->lock, flags); |
633 | ||
f8be6bfc GH |
634 | if (devinfo->resetting) { |
635 | cmnd->result = DID_ERROR << 16; | |
636 | cmnd->scsi_done(cmnd); | |
c6f63207 | 637 | spin_unlock_irqrestore(&devinfo->lock, flags); |
f8be6bfc GH |
638 | return 0; |
639 | } | |
640 | ||
e28e2f2f HG |
641 | /* Find a free uas-tag */ |
642 | for (idx = 0; idx < devinfo->qdepth; idx++) { | |
643 | if (!devinfo->cmnd[idx]) | |
644 | break; | |
645 | } | |
646 | if (idx == devinfo->qdepth) { | |
e0648520 | 647 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff | 648 | return SCSI_MLQUEUE_DEVICE_BUSY; |
e0648520 | 649 | } |
115bb1ff | 650 | |
115bb1ff MW |
651 | cmnd->scsi_done = done; |
652 | ||
5e61aede | 653 | memset(cmdinfo, 0, sizeof(*cmdinfo)); |
e28e2f2f | 654 | cmdinfo->uas_tag = idx + 1; /* uas-tag == usb-stream-id, so 1 based */ |
e0620001 | 655 | cmdinfo->state = SUBMIT_STATUS_URB | ALLOC_CMD_URB | SUBMIT_CMD_URB; |
115bb1ff MW |
656 | |
657 | switch (cmnd->sc_data_direction) { | |
658 | case DMA_FROM_DEVICE: | |
659 | cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB; | |
660 | break; | |
661 | case DMA_BIDIRECTIONAL: | |
662 | cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB; | |
685b2df4 | 663 | /* fall through */ |
115bb1ff MW |
664 | case DMA_TO_DEVICE: |
665 | cmdinfo->state |= ALLOC_DATA_OUT_URB | SUBMIT_DATA_OUT_URB; | |
666 | case DMA_NONE: | |
667 | break; | |
668 | } | |
669 | ||
e28e2f2f | 670 | if (!devinfo->use_streams) |
db32de11 | 671 | cmdinfo->state &= ~(SUBMIT_DATA_IN_URB | SUBMIT_DATA_OUT_URB); |
115bb1ff | 672 | |
b36d8391 | 673 | err = uas_submit_urbs(cmnd, devinfo); |
115bb1ff MW |
674 | if (err) { |
675 | /* If we did nothing, give up now */ | |
92a3f767 | 676 | if (cmdinfo->state & SUBMIT_STATUS_URB) { |
e0648520 | 677 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
678 | return SCSI_MLQUEUE_DEVICE_BUSY; |
679 | } | |
1bf8198e | 680 | uas_add_work(cmdinfo); |
115bb1ff MW |
681 | } |
682 | ||
e28e2f2f | 683 | devinfo->cmnd[idx] = cmnd; |
e0648520 | 684 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
685 | return 0; |
686 | } | |
687 | ||
f281233d JG |
688 | static DEF_SCSI_QCMD(uas_queuecommand) |
689 | ||
616f0e6c HG |
690 | /* |
691 | * For now we do not support actually sending an abort to the device, so | |
692 | * this eh always fails. Still we must define it to make sure that we've | |
693 | * dropped all references to the cmnd in question once this function exits. | |
694 | */ | |
695 | static int uas_eh_abort_handler(struct scsi_cmnd *cmnd) | |
115bb1ff | 696 | { |
616f0e6c HG |
697 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; |
698 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; | |
699 | struct urb *data_in_urb = NULL; | |
700 | struct urb *data_out_urb = NULL; | |
e0648520 | 701 | unsigned long flags; |
115bb1ff | 702 | |
e0648520 | 703 | spin_lock_irqsave(&devinfo->lock, flags); |
b83b86a3 | 704 | |
1ad7ed5a | 705 | uas_log_cmd_state(cmnd, __func__, 0); |
c6f63207 | 706 | |
616f0e6c HG |
707 | /* Ensure that try_complete does not call scsi_done */ |
708 | cmdinfo->state |= COMMAND_ABORTED; | |
b83b86a3 | 709 | |
616f0e6c | 710 | /* Drop all refs to this cmnd, kill data urbs to break their ref */ |
e28e2f2f | 711 | devinfo->cmnd[cmdinfo->uas_tag - 1] = NULL; |
616f0e6c HG |
712 | if (cmdinfo->state & DATA_IN_URB_INFLIGHT) |
713 | data_in_urb = usb_get_urb(cmdinfo->data_in_urb); | |
714 | if (cmdinfo->state & DATA_OUT_URB_INFLIGHT) | |
715 | data_out_urb = usb_get_urb(cmdinfo->data_out_urb); | |
e0648520 | 716 | |
4c5481ef | 717 | uas_free_unsubmitted_urbs(cmnd); |
b83b86a3 | 718 | |
b83b86a3 HG |
719 | spin_unlock_irqrestore(&devinfo->lock, flags); |
720 | ||
616f0e6c HG |
721 | if (data_in_urb) { |
722 | usb_kill_urb(data_in_urb); | |
723 | usb_put_urb(data_in_urb); | |
c6f63207 | 724 | } |
616f0e6c HG |
725 | if (data_out_urb) { |
726 | usb_kill_urb(data_out_urb); | |
727 | usb_put_urb(data_out_urb); | |
5d390403 | 728 | } |
115bb1ff | 729 | |
616f0e6c | 730 | return FAILED; |
115bb1ff MW |
731 | } |
732 | ||
e13849b7 | 733 | static int uas_eh_device_reset_handler(struct scsi_cmnd *cmnd) |
115bb1ff MW |
734 | { |
735 | struct scsi_device *sdev = cmnd->device; | |
736 | struct uas_dev_info *devinfo = sdev->hostdata; | |
737 | struct usb_device *udev = devinfo->udev; | |
b7b5d11f | 738 | unsigned long flags; |
023b515e | 739 | int err; |
115bb1ff | 740 | |
be326f4c HG |
741 | err = usb_lock_device_for_reset(udev, devinfo->intf); |
742 | if (err) { | |
743 | shost_printk(KERN_ERR, sdev->host, | |
744 | "%s FAILED to get lock err %d\n", __func__, err); | |
745 | return FAILED; | |
746 | } | |
747 | ||
326349f8 | 748 | shost_printk(KERN_INFO, sdev->host, "%s start\n", __func__); |
b7b5d11f HG |
749 | |
750 | spin_lock_irqsave(&devinfo->lock, flags); | |
023b515e | 751 | devinfo->resetting = 1; |
b7b5d11f HG |
752 | spin_unlock_irqrestore(&devinfo->lock, flags); |
753 | ||
a0e39e34 | 754 | usb_kill_anchored_urbs(&devinfo->cmd_urbs); |
023b515e GH |
755 | usb_kill_anchored_urbs(&devinfo->sense_urbs); |
756 | usb_kill_anchored_urbs(&devinfo->data_urbs); | |
1589349f HG |
757 | uas_zap_pending(devinfo, DID_RESET); |
758 | ||
023b515e | 759 | err = usb_reset_device(udev); |
b7b5d11f HG |
760 | |
761 | spin_lock_irqsave(&devinfo->lock, flags); | |
023b515e | 762 | devinfo->resetting = 0; |
b7b5d11f | 763 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff | 764 | |
be326f4c HG |
765 | usb_unlock_device(udev); |
766 | ||
023b515e | 767 | if (err) { |
ce39fe6f HG |
768 | shost_printk(KERN_INFO, sdev->host, "%s FAILED err %d\n", |
769 | __func__, err); | |
023b515e GH |
770 | return FAILED; |
771 | } | |
115bb1ff | 772 | |
023b515e GH |
773 | shost_printk(KERN_INFO, sdev->host, "%s success\n", __func__); |
774 | return SUCCESS; | |
115bb1ff MW |
775 | } |
776 | ||
13630746 HG |
777 | static int uas_target_alloc(struct scsi_target *starget) |
778 | { | |
779 | struct uas_dev_info *devinfo = (struct uas_dev_info *) | |
780 | dev_to_shost(starget->dev.parent)->hostdata; | |
781 | ||
782 | if (devinfo->flags & US_FL_NO_REPORT_LUNS) | |
783 | starget->no_report_luns = 1; | |
784 | ||
785 | return 0; | |
786 | } | |
787 | ||
115bb1ff MW |
788 | static int uas_slave_alloc(struct scsi_device *sdev) |
789 | { | |
ee136af4 HG |
790 | struct uas_dev_info *devinfo = |
791 | (struct uas_dev_info *)sdev->host->hostdata; | |
3ae62a42 | 792 | int maxp; |
ee136af4 HG |
793 | |
794 | sdev->hostdata = devinfo; | |
37599f96 | 795 | |
f0183a33 | 796 | /* |
3ae62a42 ON |
797 | * We have two requirements here. We must satisfy the requirements |
798 | * of the physical HC and the demands of the protocol, as we | |
799 | * definitely want no additional memory allocation in this path | |
800 | * ruling out using bounce buffers. | |
37599f96 | 801 | * |
3ae62a42 ON |
802 | * For a transmission on USB to continue we must never send |
803 | * a package that is smaller than maxpacket. Hence the length of each | |
804 | * scatterlist element except the last must be divisible by the | |
805 | * Bulk maxpacket value. | |
806 | * If the HC does not ensure that through SG, | |
807 | * the upper layer must do that. We must assume nothing | |
808 | * about the capabilities off the HC, so we use the most | |
809 | * pessimistic requirement. | |
810 | */ | |
811 | ||
812 | maxp = usb_maxpacket(devinfo->udev, devinfo->data_in_pipe, 0); | |
813 | blk_queue_virt_boundary(sdev->request_queue, maxp - 1); | |
814 | ||
815 | /* | |
816 | * The protocol has no requirements on alignment in the strict sense. | |
817 | * Controllers may or may not have alignment restrictions. | |
818 | * As this is not exported, we use an extremely conservative guess. | |
37599f96 HG |
819 | */ |
820 | blk_queue_update_dma_alignment(sdev->request_queue, (512 - 1)); | |
821 | ||
ee136af4 HG |
822 | if (devinfo->flags & US_FL_MAX_SECTORS_64) |
823 | blk_queue_max_hw_sectors(sdev->request_queue, 64); | |
824 | else if (devinfo->flags & US_FL_MAX_SECTORS_240) | |
825 | blk_queue_max_hw_sectors(sdev->request_queue, 240); | |
826 | ||
115bb1ff MW |
827 | return 0; |
828 | } | |
829 | ||
830 | static int uas_slave_configure(struct scsi_device *sdev) | |
831 | { | |
832 | struct uas_dev_info *devinfo = sdev->hostdata; | |
734016b0 HG |
833 | |
834 | if (devinfo->flags & US_FL_NO_REPORT_OPCODES) | |
835 | sdev->no_report_opcodes = 1; | |
836 | ||
9fa62b1a DK |
837 | /* A few buggy USB-ATA bridges don't understand FUA */ |
838 | if (devinfo->flags & US_FL_BROKEN_FUA) | |
839 | sdev->broken_fua = 1; | |
840 | ||
8c4e97dd AK |
841 | /* UAS also needs to support FL_ALWAYS_SYNC */ |
842 | if (devinfo->flags & US_FL_ALWAYS_SYNC) { | |
843 | sdev->skip_ms_page_3f = 1; | |
844 | sdev->skip_ms_page_8 = 1; | |
845 | sdev->wce_default_on = 1; | |
846 | } | |
42d1c6d4 ON |
847 | |
848 | /* | |
849 | * Some disks return the total number of blocks in response | |
850 | * to READ CAPACITY rather than the highest block number. | |
851 | * If this device makes that mistake, tell the sd driver. | |
852 | */ | |
853 | if (devinfo->flags & US_FL_FIX_CAPACITY) | |
854 | sdev->fix_capacity = 1; | |
855 | ||
856 | /* | |
857 | * Some devices don't like MODE SENSE with page=0x3f, | |
858 | * which is the command used for checking if a device | |
859 | * is write-protected. Now that we tell the sd driver | |
860 | * to do a 192-byte transfer with this command the | |
861 | * majority of devices work fine, but a few still can't | |
862 | * handle it. The sd driver will simply assume those | |
863 | * devices are write-enabled. | |
864 | */ | |
865 | if (devinfo->flags & US_FL_NO_WP_DETECT) | |
866 | sdev->skip_ms_page_3f = 1; | |
867 | ||
593224ea | 868 | scsi_change_queue_depth(sdev, devinfo->qdepth - 2); |
115bb1ff MW |
869 | return 0; |
870 | } | |
871 | ||
872 | static struct scsi_host_template uas_host_template = { | |
873 | .module = THIS_MODULE, | |
874 | .name = "uas", | |
875 | .queuecommand = uas_queuecommand, | |
13630746 | 876 | .target_alloc = uas_target_alloc, |
115bb1ff MW |
877 | .slave_alloc = uas_slave_alloc, |
878 | .slave_configure = uas_slave_configure, | |
879 | .eh_abort_handler = uas_eh_abort_handler, | |
e13849b7 | 880 | .eh_device_reset_handler = uas_eh_device_reset_handler, |
115bb1ff MW |
881 | .this_id = -1, |
882 | .sg_tablesize = SG_NONE, | |
115bb1ff | 883 | .skip_settle_delay = 1, |
4af14d11 | 884 | .dma_boundary = PAGE_SIZE - 1, |
115bb1ff MW |
885 | }; |
886 | ||
79b4c061 HG |
887 | #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \ |
888 | vendorName, productName, useProtocol, useTransport, \ | |
889 | initFunction, flags) \ | |
890 | { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \ | |
891 | .driver_info = (flags) } | |
892 | ||
115bb1ff | 893 | static struct usb_device_id uas_usb_ids[] = { |
79b4c061 | 894 | # include "unusual_uas.h" |
115bb1ff MW |
895 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_BULK) }, |
896 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_UAS) }, | |
115bb1ff MW |
897 | { } |
898 | }; | |
899 | MODULE_DEVICE_TABLE(usb, uas_usb_ids); | |
900 | ||
79b4c061 HG |
901 | #undef UNUSUAL_DEV |
902 | ||
e1be067b HG |
903 | static int uas_switch_interface(struct usb_device *udev, |
904 | struct usb_interface *intf) | |
905 | { | |
786de92b | 906 | struct usb_host_interface *alt; |
e1be067b HG |
907 | |
908 | alt = uas_find_uas_alt_setting(intf); | |
786de92b AS |
909 | if (!alt) |
910 | return -ENODEV; | |
e1be067b | 911 | |
786de92b AS |
912 | return usb_set_interface(udev, alt->desc.bInterfaceNumber, |
913 | alt->desc.bAlternateSetting); | |
e1be067b HG |
914 | } |
915 | ||
58d51444 | 916 | static int uas_configure_endpoints(struct uas_dev_info *devinfo) |
34f11e59 HG |
917 | { |
918 | struct usb_host_endpoint *eps[4] = { }; | |
919 | struct usb_device *udev = devinfo->udev; | |
920 | int r; | |
921 | ||
34f11e59 | 922 | r = uas_find_endpoints(devinfo->intf->cur_altsetting, eps); |
74d71aec HG |
923 | if (r) |
924 | return r; | |
925 | ||
926 | devinfo->cmd_pipe = usb_sndbulkpipe(udev, | |
927 | usb_endpoint_num(&eps[0]->desc)); | |
928 | devinfo->status_pipe = usb_rcvbulkpipe(udev, | |
929 | usb_endpoint_num(&eps[1]->desc)); | |
930 | devinfo->data_in_pipe = usb_rcvbulkpipe(udev, | |
931 | usb_endpoint_num(&eps[2]->desc)); | |
932 | devinfo->data_out_pipe = usb_sndbulkpipe(udev, | |
933 | usb_endpoint_num(&eps[3]->desc)); | |
115bb1ff | 934 | |
e5e55819 | 935 | if (udev->speed < USB_SPEED_SUPER) { |
e2875c33 | 936 | devinfo->qdepth = 32; |
115bb1ff MW |
937 | devinfo->use_streams = 0; |
938 | } else { | |
58d51444 | 939 | devinfo->qdepth = usb_alloc_streams(devinfo->intf, eps + 1, |
5e61aede | 940 | 3, MAX_CMNDS, GFP_NOIO); |
58d51444 HG |
941 | if (devinfo->qdepth < 0) |
942 | return devinfo->qdepth; | |
115bb1ff MW |
943 | devinfo->use_streams = 1; |
944 | } | |
58d51444 HG |
945 | |
946 | return 0; | |
115bb1ff MW |
947 | } |
948 | ||
dae51546 SAS |
949 | static void uas_free_streams(struct uas_dev_info *devinfo) |
950 | { | |
951 | struct usb_device *udev = devinfo->udev; | |
952 | struct usb_host_endpoint *eps[3]; | |
953 | ||
954 | eps[0] = usb_pipe_endpoint(udev, devinfo->status_pipe); | |
955 | eps[1] = usb_pipe_endpoint(udev, devinfo->data_in_pipe); | |
956 | eps[2] = usb_pipe_endpoint(udev, devinfo->data_out_pipe); | |
94d72f00 | 957 | usb_free_streams(devinfo->intf, eps, 3, GFP_NOIO); |
dae51546 SAS |
958 | } |
959 | ||
115bb1ff MW |
960 | static int uas_probe(struct usb_interface *intf, const struct usb_device_id *id) |
961 | { | |
6ce8213b HG |
962 | int result = -ENOMEM; |
963 | struct Scsi_Host *shost = NULL; | |
115bb1ff MW |
964 | struct uas_dev_info *devinfo; |
965 | struct usb_device *udev = interface_to_usbdev(intf); | |
a5011d44 | 966 | unsigned long dev_flags; |
115bb1ff | 967 | |
a5011d44 | 968 | if (!uas_use_uas_driver(intf, id, &dev_flags)) |
79b4c061 HG |
969 | return -ENODEV; |
970 | ||
89dc2905 MW |
971 | if (uas_switch_interface(udev, intf)) |
972 | return -ENODEV; | |
115bb1ff | 973 | |
21fc05b6 HG |
974 | shost = scsi_host_alloc(&uas_host_template, |
975 | sizeof(struct uas_dev_info)); | |
115bb1ff | 976 | if (!shost) |
6ce8213b | 977 | goto set_alt0; |
115bb1ff MW |
978 | |
979 | shost->max_cmd_len = 16 + 252; | |
980 | shost->max_id = 1; | |
bde027b4 GH |
981 | shost->max_lun = 256; |
982 | shost->max_channel = 0; | |
115bb1ff MW |
983 | shost->sg_tablesize = udev->bus->sg_tablesize; |
984 | ||
21fc05b6 | 985 | devinfo = (struct uas_dev_info *)shost->hostdata; |
115bb1ff MW |
986 | devinfo->intf = intf; |
987 | devinfo->udev = udev; | |
023b515e | 988 | devinfo->resetting = 0; |
da65c2bb | 989 | devinfo->shutdown = 0; |
a5011d44 | 990 | devinfo->flags = dev_flags; |
a0e39e34 | 991 | init_usb_anchor(&devinfo->cmd_urbs); |
bdd000fb GH |
992 | init_usb_anchor(&devinfo->sense_urbs); |
993 | init_usb_anchor(&devinfo->data_urbs); | |
e0648520 | 994 | spin_lock_init(&devinfo->lock); |
1bf8198e | 995 | INIT_WORK(&devinfo->work, uas_do_work); |
58d51444 HG |
996 | |
997 | result = uas_configure_endpoints(devinfo); | |
998 | if (result) | |
999 | goto set_alt0; | |
115bb1ff | 1000 | |
198de51d HG |
1001 | /* |
1002 | * 1 tag is reserved for untagged commands + | |
1003 | * 1 tag to avoid off by one errors in some bridge firmwares | |
1004 | */ | |
1005 | shost->can_queue = devinfo->qdepth - 2; | |
1006 | ||
c637f1fa | 1007 | usb_set_intfdata(intf, shost); |
dae51546 SAS |
1008 | result = scsi_add_host(shost, &intf->dev); |
1009 | if (result) | |
6ce8213b | 1010 | goto free_streams; |
dae51546 | 1011 | |
115bb1ff | 1012 | scsi_scan_host(shost); |
115bb1ff | 1013 | return result; |
dae51546 | 1014 | |
6ce8213b | 1015 | free_streams: |
dae51546 | 1016 | uas_free_streams(devinfo); |
c637f1fa | 1017 | usb_set_intfdata(intf, NULL); |
6ce8213b HG |
1018 | set_alt0: |
1019 | usb_set_interface(udev, intf->altsetting[0].desc.bInterfaceNumber, 0); | |
115bb1ff MW |
1020 | if (shost) |
1021 | scsi_host_put(shost); | |
1022 | return result; | |
1023 | } | |
1024 | ||
f9dc024a HG |
1025 | static int uas_cmnd_list_empty(struct uas_dev_info *devinfo) |
1026 | { | |
1027 | unsigned long flags; | |
1028 | int i, r = 1; | |
1029 | ||
1030 | spin_lock_irqsave(&devinfo->lock, flags); | |
1031 | ||
1032 | for (i = 0; i < devinfo->qdepth; i++) { | |
1033 | if (devinfo->cmnd[i]) { | |
1034 | r = 0; /* Not empty */ | |
1035 | break; | |
1036 | } | |
1037 | } | |
1038 | ||
1039 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
1040 | ||
1041 | return r; | |
1042 | } | |
1043 | ||
1044 | /* | |
1045 | * Wait for any pending cmnds to complete, on usb-2 sense_urbs may temporarily | |
1046 | * get empty while there still is more work to do due to sense-urbs completing | |
1047 | * with a READ/WRITE_READY iu code, so keep waiting until the list gets empty. | |
1048 | */ | |
1049 | static int uas_wait_for_pending_cmnds(struct uas_dev_info *devinfo) | |
1050 | { | |
1051 | unsigned long start_time; | |
1052 | int r; | |
1053 | ||
1054 | start_time = jiffies; | |
1055 | do { | |
1056 | flush_work(&devinfo->work); | |
1057 | ||
1058 | r = usb_wait_anchor_empty_timeout(&devinfo->sense_urbs, 5000); | |
1059 | if (r == 0) | |
1060 | return -ETIME; | |
1061 | ||
1062 | r = usb_wait_anchor_empty_timeout(&devinfo->data_urbs, 500); | |
1063 | if (r == 0) | |
1064 | return -ETIME; | |
1065 | ||
1066 | if (time_after(jiffies, start_time + 5 * HZ)) | |
1067 | return -ETIME; | |
1068 | } while (!uas_cmnd_list_empty(devinfo)); | |
1069 | ||
1070 | return 0; | |
1071 | } | |
1072 | ||
115bb1ff MW |
1073 | static int uas_pre_reset(struct usb_interface *intf) |
1074 | { | |
4de7a373 | 1075 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
21fc05b6 | 1076 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
4de7a373 HG |
1077 | unsigned long flags; |
1078 | ||
da65c2bb HG |
1079 | if (devinfo->shutdown) |
1080 | return 0; | |
1081 | ||
4de7a373 HG |
1082 | /* Block new requests */ |
1083 | spin_lock_irqsave(shost->host_lock, flags); | |
1084 | scsi_block_requests(shost); | |
1085 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1086 | ||
f9dc024a | 1087 | if (uas_wait_for_pending_cmnds(devinfo) != 0) { |
4de7a373 | 1088 | shost_printk(KERN_ERR, shost, "%s: timed out\n", __func__); |
f9dc024a | 1089 | scsi_unblock_requests(shost); |
4de7a373 HG |
1090 | return 1; |
1091 | } | |
1092 | ||
1093 | uas_free_streams(devinfo); | |
1094 | ||
115bb1ff MW |
1095 | return 0; |
1096 | } | |
1097 | ||
1098 | static int uas_post_reset(struct usb_interface *intf) | |
1099 | { | |
4de7a373 | 1100 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
21fc05b6 | 1101 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
4de7a373 | 1102 | unsigned long flags; |
ce39fe6f | 1103 | int err; |
4de7a373 | 1104 | |
da65c2bb HG |
1105 | if (devinfo->shutdown) |
1106 | return 0; | |
1107 | ||
ce39fe6f | 1108 | err = uas_configure_endpoints(devinfo); |
9a513c90 | 1109 | if (err && err != -ENODEV) |
58d51444 | 1110 | shost_printk(KERN_ERR, shost, |
ce39fe6f HG |
1111 | "%s: alloc streams error %d after reset", |
1112 | __func__, err); | |
4de7a373 | 1113 | |
cbeef22f | 1114 | /* we must unblock the host in every case lest we deadlock */ |
4de7a373 HG |
1115 | spin_lock_irqsave(shost->host_lock, flags); |
1116 | scsi_report_bus_reset(shost, 0); | |
1117 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1118 | ||
1119 | scsi_unblock_requests(shost); | |
1120 | ||
cbeef22f | 1121 | return err ? 1 : 0; |
115bb1ff MW |
1122 | } |
1123 | ||
0df1f663 HG |
1124 | static int uas_suspend(struct usb_interface *intf, pm_message_t message) |
1125 | { | |
1126 | struct Scsi_Host *shost = usb_get_intfdata(intf); | |
21fc05b6 | 1127 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
0df1f663 | 1128 | |
f9dc024a | 1129 | if (uas_wait_for_pending_cmnds(devinfo) != 0) { |
0df1f663 HG |
1130 | shost_printk(KERN_ERR, shost, "%s: timed out\n", __func__); |
1131 | return -ETIME; | |
1132 | } | |
1133 | ||
1134 | return 0; | |
1135 | } | |
1136 | ||
1137 | static int uas_resume(struct usb_interface *intf) | |
1138 | { | |
1139 | return 0; | |
1140 | } | |
1141 | ||
1142 | static int uas_reset_resume(struct usb_interface *intf) | |
1143 | { | |
1144 | struct Scsi_Host *shost = usb_get_intfdata(intf); | |
21fc05b6 | 1145 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
0df1f663 | 1146 | unsigned long flags; |
ce39fe6f | 1147 | int err; |
0df1f663 | 1148 | |
ce39fe6f HG |
1149 | err = uas_configure_endpoints(devinfo); |
1150 | if (err) { | |
0df1f663 | 1151 | shost_printk(KERN_ERR, shost, |
ce39fe6f HG |
1152 | "%s: alloc streams error %d after reset", |
1153 | __func__, err); | |
0df1f663 HG |
1154 | return -EIO; |
1155 | } | |
1156 | ||
1157 | spin_lock_irqsave(shost->host_lock, flags); | |
1158 | scsi_report_bus_reset(shost, 0); | |
1159 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1160 | ||
1161 | return 0; | |
1162 | } | |
1163 | ||
115bb1ff MW |
1164 | static void uas_disconnect(struct usb_interface *intf) |
1165 | { | |
115bb1ff | 1166 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
21fc05b6 | 1167 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
b7b5d11f | 1168 | unsigned long flags; |
115bb1ff | 1169 | |
b7b5d11f | 1170 | spin_lock_irqsave(&devinfo->lock, flags); |
4c456971 | 1171 | devinfo->resetting = 1; |
b7b5d11f HG |
1172 | spin_unlock_irqrestore(&devinfo->lock, flags); |
1173 | ||
1bf8198e | 1174 | cancel_work_sync(&devinfo->work); |
a0e39e34 | 1175 | usb_kill_anchored_urbs(&devinfo->cmd_urbs); |
bdd000fb GH |
1176 | usb_kill_anchored_urbs(&devinfo->sense_urbs); |
1177 | usb_kill_anchored_urbs(&devinfo->data_urbs); | |
1589349f HG |
1178 | uas_zap_pending(devinfo, DID_NO_CONNECT); |
1179 | ||
4c456971 | 1180 | scsi_remove_host(shost); |
dae51546 | 1181 | uas_free_streams(devinfo); |
21fc05b6 | 1182 | scsi_host_put(shost); |
115bb1ff MW |
1183 | } |
1184 | ||
da65c2bb HG |
1185 | /* |
1186 | * Put the device back in usb-storage mode on shutdown, as some BIOS-es | |
1187 | * hang on reboot when the device is still in uas mode. Note the reset is | |
1188 | * necessary as some devices won't revert to usb-storage mode without it. | |
1189 | */ | |
1190 | static void uas_shutdown(struct device *dev) | |
1191 | { | |
1192 | struct usb_interface *intf = to_usb_interface(dev); | |
1193 | struct usb_device *udev = interface_to_usbdev(intf); | |
1194 | struct Scsi_Host *shost = usb_get_intfdata(intf); | |
21fc05b6 | 1195 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
da65c2bb HG |
1196 | |
1197 | if (system_state != SYSTEM_RESTART) | |
1198 | return; | |
1199 | ||
1200 | devinfo->shutdown = 1; | |
1201 | uas_free_streams(devinfo); | |
1202 | usb_set_interface(udev, intf->altsetting[0].desc.bInterfaceNumber, 0); | |
1203 | usb_reset_device(udev); | |
1204 | } | |
1205 | ||
115bb1ff MW |
1206 | static struct usb_driver uas_driver = { |
1207 | .name = "uas", | |
1208 | .probe = uas_probe, | |
1209 | .disconnect = uas_disconnect, | |
1210 | .pre_reset = uas_pre_reset, | |
1211 | .post_reset = uas_post_reset, | |
0df1f663 HG |
1212 | .suspend = uas_suspend, |
1213 | .resume = uas_resume, | |
1214 | .reset_resume = uas_reset_resume, | |
da65c2bb | 1215 | .drvwrap.driver.shutdown = uas_shutdown, |
115bb1ff MW |
1216 | .id_table = uas_usb_ids, |
1217 | }; | |
1218 | ||
65db4305 | 1219 | module_usb_driver(uas_driver); |
115bb1ff MW |
1220 | |
1221 | MODULE_LICENSE("GPL"); | |
f50a4968 HG |
1222 | MODULE_AUTHOR( |
1223 | "Hans de Goede <hdegoede@redhat.com>, Matthew Wilcox and Sarah Sharp"); |