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Commit | Line | Data |
---|---|---|
115bb1ff MW |
1 | /* |
2 | * USB Attached SCSI | |
3 | * Note that this is not the same as the USB Mass Storage driver | |
4 | * | |
13630746 | 5 | * Copyright Hans de Goede <hdegoede@redhat.com> for Red Hat, Inc. 2013 - 2016 |
115bb1ff MW |
6 | * Copyright Matthew Wilcox for Intel Corp, 2010 |
7 | * Copyright Sarah Sharp for Intel Corp, 2010 | |
8 | * | |
9 | * Distributed under the terms of the GNU GPL, version two. | |
10 | */ | |
11 | ||
12 | #include <linux/blkdev.h> | |
13 | #include <linux/slab.h> | |
14 | #include <linux/types.h> | |
6eb0de82 | 15 | #include <linux/module.h> |
115bb1ff | 16 | #include <linux/usb.h> |
79b4c061 | 17 | #include <linux/usb_usual.h> |
c898add5 | 18 | #include <linux/usb/hcd.h> |
115bb1ff | 19 | #include <linux/usb/storage.h> |
348748b0 | 20 | #include <linux/usb/uas.h> |
115bb1ff MW |
21 | |
22 | #include <scsi/scsi.h> | |
4de7a373 | 23 | #include <scsi/scsi_eh.h> |
115bb1ff MW |
24 | #include <scsi/scsi_dbg.h> |
25 | #include <scsi/scsi_cmnd.h> | |
26 | #include <scsi/scsi_device.h> | |
27 | #include <scsi/scsi_host.h> | |
28 | #include <scsi/scsi_tcq.h> | |
29 | ||
82aa0387 | 30 | #include "uas-detect.h" |
59307852 | 31 | #include "scsiglue.h" |
82aa0387 | 32 | |
5e61aede | 33 | #define MAX_CMNDS 256 |
115bb1ff | 34 | |
115bb1ff MW |
35 | struct uas_dev_info { |
36 | struct usb_interface *intf; | |
37 | struct usb_device *udev; | |
a0e39e34 | 38 | struct usb_anchor cmd_urbs; |
bdd000fb GH |
39 | struct usb_anchor sense_urbs; |
40 | struct usb_anchor data_urbs; | |
59307852 | 41 | unsigned long flags; |
023b515e | 42 | int qdepth, resetting; |
115bb1ff MW |
43 | unsigned cmd_pipe, status_pipe, data_in_pipe, data_out_pipe; |
44 | unsigned use_streams:1; | |
da65c2bb | 45 | unsigned shutdown:1; |
5e61aede | 46 | struct scsi_cmnd *cmnd[MAX_CMNDS]; |
e0648520 | 47 | spinlock_t lock; |
1bf8198e | 48 | struct work_struct work; |
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 | |
115bb1ff MW |
84 | static void uas_do_work(struct work_struct *work) |
85 | { | |
1bf8198e GH |
86 | struct uas_dev_info *devinfo = |
87 | container_of(work, struct uas_dev_info, work); | |
115bb1ff | 88 | struct uas_cmd_info *cmdinfo; |
43cd99cb | 89 | struct scsi_cmnd *cmnd; |
e0648520 | 90 | unsigned long flags; |
43cd99cb | 91 | int i, err; |
115bb1ff | 92 | |
1bf8198e | 93 | spin_lock_irqsave(&devinfo->lock, flags); |
b7b5d11f HG |
94 | |
95 | if (devinfo->resetting) | |
96 | goto out; | |
97 | ||
43cd99cb HG |
98 | for (i = 0; i < devinfo->qdepth; i++) { |
99 | if (!devinfo->cmnd[i]) | |
100 | continue; | |
101 | ||
102 | cmnd = devinfo->cmnd[i]; | |
103 | cmdinfo = (void *)&cmnd->SCp; | |
61c09ce5 HG |
104 | |
105 | if (!(cmdinfo->state & IS_IN_WORK_LIST)) | |
106 | continue; | |
107 | ||
b36d8391 | 108 | err = uas_submit_urbs(cmnd, cmnd->device->hostdata); |
61c09ce5 | 109 | if (!err) |
efefecf3 | 110 | cmdinfo->state &= ~IS_IN_WORK_LIST; |
61c09ce5 | 111 | else |
1bf8198e | 112 | schedule_work(&devinfo->work); |
115bb1ff | 113 | } |
b7b5d11f | 114 | out: |
4c456971 GH |
115 | spin_unlock_irqrestore(&devinfo->lock, flags); |
116 | } | |
117 | ||
1bf8198e GH |
118 | static void uas_add_work(struct uas_cmd_info *cmdinfo) |
119 | { | |
120 | struct scsi_pointer *scp = (void *)cmdinfo; | |
121 | struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, SCp); | |
122 | struct uas_dev_info *devinfo = cmnd->device->hostdata; | |
123 | ||
ab945eff | 124 | lockdep_assert_held(&devinfo->lock); |
1bf8198e GH |
125 | cmdinfo->state |= IS_IN_WORK_LIST; |
126 | schedule_work(&devinfo->work); | |
127 | } | |
128 | ||
1589349f | 129 | static void uas_zap_pending(struct uas_dev_info *devinfo, int result) |
326349f8 GH |
130 | { |
131 | struct uas_cmd_info *cmdinfo; | |
43cd99cb | 132 | struct scsi_cmnd *cmnd; |
326349f8 | 133 | unsigned long flags; |
43cd99cb | 134 | int i, err; |
326349f8 GH |
135 | |
136 | spin_lock_irqsave(&devinfo->lock, flags); | |
43cd99cb HG |
137 | for (i = 0; i < devinfo->qdepth; i++) { |
138 | if (!devinfo->cmnd[i]) | |
139 | continue; | |
140 | ||
141 | cmnd = devinfo->cmnd[i]; | |
142 | cmdinfo = (void *)&cmnd->SCp; | |
1ad7ed5a | 143 | uas_log_cmd_state(cmnd, __func__, 0); |
9c15c573 HG |
144 | /* Sense urbs were killed, clear COMMAND_INFLIGHT manually */ |
145 | cmdinfo->state &= ~COMMAND_INFLIGHT; | |
1589349f | 146 | cmnd->result = result << 16; |
9c15c573 HG |
147 | err = uas_try_complete(cmnd, __func__); |
148 | WARN_ON(err != 0); | |
326349f8 GH |
149 | } |
150 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
151 | } | |
152 | ||
115bb1ff MW |
153 | static void uas_sense(struct urb *urb, struct scsi_cmnd *cmnd) |
154 | { | |
155 | struct sense_iu *sense_iu = urb->transfer_buffer; | |
156 | struct scsi_device *sdev = cmnd->device; | |
157 | ||
158 | if (urb->actual_length > 16) { | |
159 | unsigned len = be16_to_cpup(&sense_iu->len); | |
160 | if (len + 16 != urb->actual_length) { | |
161 | int newlen = min(len + 16, urb->actual_length) - 16; | |
162 | if (newlen < 0) | |
163 | newlen = 0; | |
164 | sdev_printk(KERN_INFO, sdev, "%s: urb length %d " | |
165 | "disagrees with IU sense data length %d, " | |
166 | "using %d bytes of sense data\n", __func__, | |
167 | urb->actual_length, len, newlen); | |
168 | len = newlen; | |
169 | } | |
170 | memcpy(cmnd->sense_buffer, sense_iu->sense, len); | |
171 | } | |
172 | ||
173 | cmnd->result = sense_iu->status; | |
115bb1ff MW |
174 | } |
175 | ||
1ad7ed5a HG |
176 | static void uas_log_cmd_state(struct scsi_cmnd *cmnd, const char *prefix, |
177 | int status) | |
b1d67693 GH |
178 | { |
179 | struct uas_cmd_info *ci = (void *)&cmnd->SCp; | |
e28e2f2f | 180 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; |
b1d67693 | 181 | |
60d9f67d | 182 | scmd_printk(KERN_INFO, cmnd, |
e28e2f2f HG |
183 | "%s %d uas-tag %d inflight:%s%s%s%s%s%s%s%s%s%s%s%s ", |
184 | prefix, status, cmdinfo->uas_tag, | |
b1d67693 GH |
185 | (ci->state & SUBMIT_STATUS_URB) ? " s-st" : "", |
186 | (ci->state & ALLOC_DATA_IN_URB) ? " a-in" : "", | |
187 | (ci->state & SUBMIT_DATA_IN_URB) ? " s-in" : "", | |
188 | (ci->state & ALLOC_DATA_OUT_URB) ? " a-out" : "", | |
189 | (ci->state & SUBMIT_DATA_OUT_URB) ? " s-out" : "", | |
190 | (ci->state & ALLOC_CMD_URB) ? " a-cmd" : "", | |
191 | (ci->state & SUBMIT_CMD_URB) ? " s-cmd" : "", | |
192 | (ci->state & COMMAND_INFLIGHT) ? " CMD" : "", | |
193 | (ci->state & DATA_IN_URB_INFLIGHT) ? " IN" : "", | |
194 | (ci->state & DATA_OUT_URB_INFLIGHT) ? " OUT" : "", | |
b06e48af | 195 | (ci->state & COMMAND_ABORTED) ? " abort" : "", |
efefecf3 | 196 | (ci->state & IS_IN_WORK_LIST) ? " work" : ""); |
6dcd8ec2 | 197 | scsi_print_command(cmnd); |
b1d67693 GH |
198 | } |
199 | ||
4c5481ef HG |
200 | static void uas_free_unsubmitted_urbs(struct scsi_cmnd *cmnd) |
201 | { | |
202 | struct uas_cmd_info *cmdinfo; | |
203 | ||
204 | if (!cmnd) | |
205 | return; | |
206 | ||
207 | cmdinfo = (void *)&cmnd->SCp; | |
208 | ||
209 | if (cmdinfo->state & SUBMIT_CMD_URB) | |
210 | usb_free_urb(cmdinfo->cmd_urb); | |
211 | ||
212 | /* data urbs may have never gotten their submit flag set */ | |
213 | if (!(cmdinfo->state & DATA_IN_URB_INFLIGHT)) | |
214 | usb_free_urb(cmdinfo->data_in_urb); | |
215 | if (!(cmdinfo->state & DATA_OUT_URB_INFLIGHT)) | |
216 | usb_free_urb(cmdinfo->data_out_urb); | |
b1d67693 GH |
217 | } |
218 | ||
219 | static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller) | |
220 | { | |
221 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
e0648520 | 222 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
b1d67693 | 223 | |
ab945eff | 224 | lockdep_assert_held(&devinfo->lock); |
b1d67693 GH |
225 | if (cmdinfo->state & (COMMAND_INFLIGHT | |
226 | DATA_IN_URB_INFLIGHT | | |
b06e48af | 227 | DATA_OUT_URB_INFLIGHT | |
616f0e6c | 228 | COMMAND_ABORTED)) |
b1d67693 | 229 | return -EBUSY; |
e28e2f2f | 230 | devinfo->cmnd[cmdinfo->uas_tag - 1] = NULL; |
4c5481ef | 231 | uas_free_unsubmitted_urbs(cmnd); |
c621a81e | 232 | cmnd->scsi_done(cmnd); |
b1d67693 | 233 | return 0; |
115bb1ff MW |
234 | } |
235 | ||
236 | static void uas_xfer_data(struct urb *urb, struct scsi_cmnd *cmnd, | |
b1d67693 | 237 | unsigned direction) |
115bb1ff MW |
238 | { |
239 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
240 | int err; | |
241 | ||
b1d67693 | 242 | cmdinfo->state |= direction | SUBMIT_STATUS_URB; |
b36d8391 | 243 | err = uas_submit_urbs(cmnd, cmnd->device->hostdata); |
115bb1ff | 244 | if (err) { |
1bf8198e | 245 | uas_add_work(cmdinfo); |
115bb1ff MW |
246 | } |
247 | } | |
248 | ||
aa742683 ON |
249 | static bool uas_evaluate_response_iu(struct response_iu *riu, struct scsi_cmnd *cmnd) |
250 | { | |
251 | u8 response_code = riu->response_code; | |
252 | ||
253 | switch (response_code) { | |
254 | case RC_INCORRECT_LUN: | |
255 | cmnd->result = DID_BAD_TARGET << 16; | |
256 | break; | |
257 | case RC_TMF_SUCCEEDED: | |
258 | cmnd->result = DID_OK << 16; | |
259 | break; | |
260 | case RC_TMF_NOT_SUPPORTED: | |
261 | cmnd->result = DID_TARGET_FAILURE << 16; | |
262 | break; | |
263 | default: | |
264 | uas_log_cmd_state(cmnd, "response iu", response_code); | |
265 | cmnd->result = DID_ERROR << 16; | |
266 | break; | |
267 | } | |
268 | ||
269 | return response_code == RC_TMF_SUCCEEDED; | |
270 | } | |
271 | ||
115bb1ff MW |
272 | static void uas_stat_cmplt(struct urb *urb) |
273 | { | |
274 | struct iu *iu = urb->transfer_buffer; | |
22188f4a | 275 | struct Scsi_Host *shost = urb->context; |
21fc05b6 | 276 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
60d9f67d HG |
277 | struct urb *data_in_urb = NULL; |
278 | struct urb *data_out_urb = NULL; | |
115bb1ff | 279 | struct scsi_cmnd *cmnd; |
b1d67693 | 280 | struct uas_cmd_info *cmdinfo; |
e0648520 | 281 | unsigned long flags; |
5e61aede | 282 | unsigned int idx; |
cca26be3 | 283 | int status = urb->status; |
aa742683 | 284 | bool success; |
115bb1ff | 285 | |
b7b5d11f HG |
286 | spin_lock_irqsave(&devinfo->lock, flags); |
287 | ||
288 | if (devinfo->resetting) | |
289 | goto out; | |
115bb1ff | 290 | |
cca26be3 ON |
291 | if (status) { |
292 | if (status != -ENOENT && status != -ECONNRESET && status != -ESHUTDOWN) | |
293 | dev_err(&urb->dev->dev, "stat urb: status %d\n", status); | |
b7b5d11f | 294 | goto out; |
115bb1ff MW |
295 | } |
296 | ||
5e61aede HG |
297 | idx = be16_to_cpup(&iu->tag) - 1; |
298 | if (idx >= MAX_CMNDS || !devinfo->cmnd[idx]) { | |
299 | dev_err(&urb->dev->dev, | |
e28e2f2f | 300 | "stat urb: no pending cmd for uas-tag %d\n", idx + 1); |
b7b5d11f | 301 | goto out; |
023b515e GH |
302 | } |
303 | ||
5e61aede | 304 | cmnd = devinfo->cmnd[idx]; |
e0423dee | 305 | cmdinfo = (void *)&cmnd->SCp; |
d89da03a HG |
306 | |
307 | if (!(cmdinfo->state & COMMAND_INFLIGHT)) { | |
1ad7ed5a | 308 | uas_log_cmd_state(cmnd, "unexpected status cmplt", 0); |
d89da03a | 309 | goto out; |
96c1eb98 | 310 | } |
115bb1ff MW |
311 | |
312 | switch (iu->iu_id) { | |
313 | case IU_ID_STATUS: | |
5ad22cfc | 314 | uas_sense(urb, cmnd); |
8aac863e GH |
315 | if (cmnd->result != 0) { |
316 | /* cancel data transfers on error */ | |
60d9f67d HG |
317 | data_in_urb = usb_get_urb(cmdinfo->data_in_urb); |
318 | data_out_urb = usb_get_urb(cmdinfo->data_out_urb); | |
8aac863e | 319 | } |
b1d67693 GH |
320 | cmdinfo->state &= ~COMMAND_INFLIGHT; |
321 | uas_try_complete(cmnd, __func__); | |
115bb1ff MW |
322 | break; |
323 | case IU_ID_READ_READY: | |
8e453155 HG |
324 | if (!cmdinfo->data_in_urb || |
325 | (cmdinfo->state & DATA_IN_URB_INFLIGHT)) { | |
1ad7ed5a | 326 | uas_log_cmd_state(cmnd, "unexpected read rdy", 0); |
8e453155 HG |
327 | break; |
328 | } | |
115bb1ff MW |
329 | uas_xfer_data(urb, cmnd, SUBMIT_DATA_IN_URB); |
330 | break; | |
331 | case IU_ID_WRITE_READY: | |
8e453155 HG |
332 | if (!cmdinfo->data_out_urb || |
333 | (cmdinfo->state & DATA_OUT_URB_INFLIGHT)) { | |
1ad7ed5a | 334 | uas_log_cmd_state(cmnd, "unexpected write rdy", 0); |
8e453155 HG |
335 | break; |
336 | } | |
115bb1ff MW |
337 | uas_xfer_data(urb, cmnd, SUBMIT_DATA_OUT_URB); |
338 | break; | |
fac1f485 | 339 | case IU_ID_RESPONSE: |
fac1f485 | 340 | cmdinfo->state &= ~COMMAND_INFLIGHT; |
aa742683 ON |
341 | success = uas_evaluate_response_iu((struct response_iu *)iu, cmnd); |
342 | if (!success) { | |
343 | /* Error, cancel data transfers */ | |
344 | data_in_urb = usb_get_urb(cmdinfo->data_in_urb); | |
345 | data_out_urb = usb_get_urb(cmdinfo->data_out_urb); | |
346 | } | |
fac1f485 HG |
347 | uas_try_complete(cmnd, __func__); |
348 | break; | |
115bb1ff | 349 | default: |
1ad7ed5a | 350 | uas_log_cmd_state(cmnd, "bogus IU", iu->iu_id); |
115bb1ff | 351 | } |
b7b5d11f | 352 | out: |
e9bd7e1a | 353 | usb_free_urb(urb); |
e0648520 | 354 | spin_unlock_irqrestore(&devinfo->lock, flags); |
60d9f67d HG |
355 | |
356 | /* Unlinking of data urbs must be done without holding the lock */ | |
357 | if (data_in_urb) { | |
358 | usb_unlink_urb(data_in_urb); | |
359 | usb_put_urb(data_in_urb); | |
360 | } | |
361 | if (data_out_urb) { | |
362 | usb_unlink_urb(data_out_urb); | |
363 | usb_put_urb(data_out_urb); | |
364 | } | |
115bb1ff MW |
365 | } |
366 | ||
c621a81e | 367 | static void uas_data_cmplt(struct urb *urb) |
115bb1ff | 368 | { |
b1d67693 GH |
369 | struct scsi_cmnd *cmnd = urb->context; |
370 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
e0648520 | 371 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
b1d67693 | 372 | struct scsi_data_buffer *sdb = NULL; |
e0648520 | 373 | unsigned long flags; |
cca26be3 | 374 | int status = urb->status; |
b1d67693 | 375 | |
e0648520 | 376 | spin_lock_irqsave(&devinfo->lock, flags); |
b7b5d11f | 377 | |
b1d67693 GH |
378 | if (cmdinfo->data_in_urb == urb) { |
379 | sdb = scsi_in(cmnd); | |
380 | cmdinfo->state &= ~DATA_IN_URB_INFLIGHT; | |
85fea825 | 381 | cmdinfo->data_in_urb = NULL; |
b1d67693 GH |
382 | } else if (cmdinfo->data_out_urb == urb) { |
383 | sdb = scsi_out(cmnd); | |
384 | cmdinfo->state &= ~DATA_OUT_URB_INFLIGHT; | |
85fea825 | 385 | cmdinfo->data_out_urb = NULL; |
b1d67693 | 386 | } |
f491ecbb GH |
387 | if (sdb == NULL) { |
388 | WARN_ON_ONCE(1); | |
b7b5d11f HG |
389 | goto out; |
390 | } | |
391 | ||
392 | if (devinfo->resetting) | |
393 | goto out; | |
394 | ||
d89da03a HG |
395 | /* Data urbs should not complete before the cmd urb is submitted */ |
396 | if (cmdinfo->state & SUBMIT_CMD_URB) { | |
1ad7ed5a | 397 | uas_log_cmd_state(cmnd, "unexpected data cmplt", 0); |
d89da03a HG |
398 | goto out; |
399 | } | |
400 | ||
cca26be3 ON |
401 | if (status) { |
402 | if (status != -ENOENT && status != -ECONNRESET && status != -ESHUTDOWN) | |
403 | uas_log_cmd_state(cmnd, "data cmplt err", status); | |
8aac863e GH |
404 | /* error: no data transfered */ |
405 | sdb->resid = sdb->length; | |
406 | } else { | |
407 | sdb->resid = sdb->length - urb->actual_length; | |
408 | } | |
b1d67693 | 409 | uas_try_complete(cmnd, __func__); |
b7b5d11f | 410 | out: |
85fea825 | 411 | usb_free_urb(urb); |
e0648520 | 412 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
413 | } |
414 | ||
876285cc HG |
415 | static void uas_cmd_cmplt(struct urb *urb) |
416 | { | |
b6823c51 HG |
417 | if (urb->status) |
418 | dev_err(&urb->dev->dev, "cmd cmplt err %d\n", urb->status); | |
876285cc | 419 | |
876285cc HG |
420 | usb_free_urb(urb); |
421 | } | |
422 | ||
115bb1ff | 423 | static struct urb *uas_alloc_data_urb(struct uas_dev_info *devinfo, gfp_t gfp, |
b1d67693 GH |
424 | struct scsi_cmnd *cmnd, |
425 | enum dma_data_direction dir) | |
115bb1ff MW |
426 | { |
427 | struct usb_device *udev = devinfo->udev; | |
2d75b9cb | 428 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; |
115bb1ff | 429 | struct urb *urb = usb_alloc_urb(0, gfp); |
b1d67693 GH |
430 | struct scsi_data_buffer *sdb = (dir == DMA_FROM_DEVICE) |
431 | ? scsi_in(cmnd) : scsi_out(cmnd); | |
2d75b9cb HG |
432 | unsigned int pipe = (dir == DMA_FROM_DEVICE) |
433 | ? devinfo->data_in_pipe : devinfo->data_out_pipe; | |
115bb1ff MW |
434 | |
435 | if (!urb) | |
436 | goto out; | |
b1d67693 GH |
437 | usb_fill_bulk_urb(urb, udev, pipe, NULL, sdb->length, |
438 | uas_data_cmplt, cmnd); | |
e28e2f2f HG |
439 | if (devinfo->use_streams) |
440 | urb->stream_id = cmdinfo->uas_tag; | |
115bb1ff MW |
441 | urb->num_sgs = udev->bus->sg_tablesize ? sdb->table.nents : 0; |
442 | urb->sg = sdb->table.sgl; | |
443 | out: | |
444 | return urb; | |
445 | } | |
446 | ||
447 | static struct urb *uas_alloc_sense_urb(struct uas_dev_info *devinfo, gfp_t gfp, | |
2d75b9cb | 448 | struct scsi_cmnd *cmnd) |
115bb1ff MW |
449 | { |
450 | struct usb_device *udev = devinfo->udev; | |
2d75b9cb | 451 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; |
115bb1ff MW |
452 | struct urb *urb = usb_alloc_urb(0, gfp); |
453 | struct sense_iu *iu; | |
454 | ||
455 | if (!urb) | |
456 | goto out; | |
457 | ||
ac563cfd | 458 | iu = kzalloc(sizeof(*iu), gfp); |
115bb1ff MW |
459 | if (!iu) |
460 | goto free; | |
461 | ||
462 | usb_fill_bulk_urb(urb, udev, devinfo->status_pipe, iu, sizeof(*iu), | |
2d75b9cb | 463 | uas_stat_cmplt, cmnd->device->host); |
e28e2f2f HG |
464 | if (devinfo->use_streams) |
465 | urb->stream_id = cmdinfo->uas_tag; | |
115bb1ff MW |
466 | urb->transfer_flags |= URB_FREE_BUFFER; |
467 | out: | |
468 | return urb; | |
469 | free: | |
470 | usb_free_urb(urb); | |
471 | return NULL; | |
472 | } | |
473 | ||
474 | static struct urb *uas_alloc_cmd_urb(struct uas_dev_info *devinfo, gfp_t gfp, | |
a887cd36 | 475 | struct scsi_cmnd *cmnd) |
115bb1ff MW |
476 | { |
477 | struct usb_device *udev = devinfo->udev; | |
478 | struct scsi_device *sdev = cmnd->device; | |
e28e2f2f | 479 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; |
115bb1ff MW |
480 | struct urb *urb = usb_alloc_urb(0, gfp); |
481 | struct command_iu *iu; | |
482 | int len; | |
483 | ||
484 | if (!urb) | |
485 | goto out; | |
486 | ||
487 | len = cmnd->cmd_len - 16; | |
488 | if (len < 0) | |
489 | len = 0; | |
490 | len = ALIGN(len, 4); | |
ac563cfd | 491 | iu = kzalloc(sizeof(*iu) + len, gfp); |
115bb1ff MW |
492 | if (!iu) |
493 | goto free; | |
494 | ||
495 | iu->iu_id = IU_ID_COMMAND; | |
e28e2f2f | 496 | iu->tag = cpu_to_be16(cmdinfo->uas_tag); |
02e031cb | 497 | iu->prio_attr = UAS_SIMPLE_TAG; |
115bb1ff MW |
498 | iu->len = len; |
499 | int_to_scsilun(sdev->lun, &iu->lun); | |
500 | memcpy(iu->cdb, cmnd->cmnd, cmnd->cmd_len); | |
501 | ||
502 | usb_fill_bulk_urb(urb, udev, devinfo->cmd_pipe, iu, sizeof(*iu) + len, | |
b6823c51 | 503 | uas_cmd_cmplt, NULL); |
115bb1ff MW |
504 | urb->transfer_flags |= URB_FREE_BUFFER; |
505 | out: | |
506 | return urb; | |
507 | free: | |
508 | usb_free_urb(urb); | |
509 | return NULL; | |
510 | } | |
511 | ||
512 | /* | |
513 | * Why should I request the Status IU before sending the Command IU? Spec | |
514 | * says to, but also says the device may receive them in any order. Seems | |
515 | * daft to me. | |
516 | */ | |
517 | ||
2d75b9cb | 518 | static struct urb *uas_submit_sense_urb(struct scsi_cmnd *cmnd, gfp_t gfp) |
115bb1ff | 519 | { |
2d75b9cb | 520 | struct uas_dev_info *devinfo = cmnd->device->hostdata; |
e9bd7e1a | 521 | struct urb *urb; |
876285cc | 522 | int err; |
115bb1ff | 523 | |
2d75b9cb | 524 | urb = uas_alloc_sense_urb(devinfo, gfp, cmnd); |
e9bd7e1a | 525 | if (!urb) |
70cf0fba | 526 | return NULL; |
d5f808d3 | 527 | usb_anchor_urb(urb, &devinfo->sense_urbs); |
876285cc HG |
528 | err = usb_submit_urb(urb, gfp); |
529 | if (err) { | |
d5f808d3 | 530 | usb_unanchor_urb(urb); |
1ad7ed5a | 531 | uas_log_cmd_state(cmnd, "sense submit err", err); |
e9bd7e1a | 532 | usb_free_urb(urb); |
70cf0fba | 533 | return NULL; |
115bb1ff | 534 | } |
70cf0fba | 535 | return urb; |
e9bd7e1a GH |
536 | } |
537 | ||
538 | static int uas_submit_urbs(struct scsi_cmnd *cmnd, | |
b36d8391 | 539 | struct uas_dev_info *devinfo) |
e9bd7e1a GH |
540 | { |
541 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
70cf0fba | 542 | struct urb *urb; |
876285cc | 543 | int err; |
115bb1ff | 544 | |
ab945eff | 545 | lockdep_assert_held(&devinfo->lock); |
92a3f767 | 546 | if (cmdinfo->state & SUBMIT_STATUS_URB) { |
b36d8391 | 547 | urb = uas_submit_sense_urb(cmnd, GFP_ATOMIC); |
70cf0fba HG |
548 | if (!urb) |
549 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
92a3f767 | 550 | cmdinfo->state &= ~SUBMIT_STATUS_URB; |
115bb1ff MW |
551 | } |
552 | ||
553 | if (cmdinfo->state & ALLOC_DATA_IN_URB) { | |
b36d8391 | 554 | cmdinfo->data_in_urb = uas_alloc_data_urb(devinfo, GFP_ATOMIC, |
2d75b9cb | 555 | cmnd, DMA_FROM_DEVICE); |
115bb1ff MW |
556 | if (!cmdinfo->data_in_urb) |
557 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
558 | cmdinfo->state &= ~ALLOC_DATA_IN_URB; | |
559 | } | |
560 | ||
561 | if (cmdinfo->state & SUBMIT_DATA_IN_URB) { | |
d5f808d3 | 562 | usb_anchor_urb(cmdinfo->data_in_urb, &devinfo->data_urbs); |
b36d8391 | 563 | err = usb_submit_urb(cmdinfo->data_in_urb, GFP_ATOMIC); |
876285cc | 564 | if (err) { |
d5f808d3 | 565 | usb_unanchor_urb(cmdinfo->data_in_urb); |
1ad7ed5a | 566 | uas_log_cmd_state(cmnd, "data in submit err", err); |
115bb1ff MW |
567 | return SCSI_MLQUEUE_DEVICE_BUSY; |
568 | } | |
569 | cmdinfo->state &= ~SUBMIT_DATA_IN_URB; | |
b1d67693 | 570 | cmdinfo->state |= DATA_IN_URB_INFLIGHT; |
115bb1ff MW |
571 | } |
572 | ||
573 | if (cmdinfo->state & ALLOC_DATA_OUT_URB) { | |
b36d8391 | 574 | cmdinfo->data_out_urb = uas_alloc_data_urb(devinfo, GFP_ATOMIC, |
2d75b9cb | 575 | cmnd, DMA_TO_DEVICE); |
115bb1ff MW |
576 | if (!cmdinfo->data_out_urb) |
577 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
578 | cmdinfo->state &= ~ALLOC_DATA_OUT_URB; | |
579 | } | |
580 | ||
581 | if (cmdinfo->state & SUBMIT_DATA_OUT_URB) { | |
d5f808d3 | 582 | usb_anchor_urb(cmdinfo->data_out_urb, &devinfo->data_urbs); |
b36d8391 | 583 | err = usb_submit_urb(cmdinfo->data_out_urb, GFP_ATOMIC); |
876285cc | 584 | if (err) { |
d5f808d3 | 585 | usb_unanchor_urb(cmdinfo->data_out_urb); |
1ad7ed5a | 586 | uas_log_cmd_state(cmnd, "data out submit err", err); |
115bb1ff MW |
587 | return SCSI_MLQUEUE_DEVICE_BUSY; |
588 | } | |
589 | cmdinfo->state &= ~SUBMIT_DATA_OUT_URB; | |
b1d67693 | 590 | cmdinfo->state |= DATA_OUT_URB_INFLIGHT; |
115bb1ff MW |
591 | } |
592 | ||
593 | if (cmdinfo->state & ALLOC_CMD_URB) { | |
b36d8391 | 594 | cmdinfo->cmd_urb = uas_alloc_cmd_urb(devinfo, GFP_ATOMIC, cmnd); |
115bb1ff MW |
595 | if (!cmdinfo->cmd_urb) |
596 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
597 | cmdinfo->state &= ~ALLOC_CMD_URB; | |
598 | } | |
599 | ||
600 | if (cmdinfo->state & SUBMIT_CMD_URB) { | |
d5f808d3 | 601 | usb_anchor_urb(cmdinfo->cmd_urb, &devinfo->cmd_urbs); |
b36d8391 | 602 | err = usb_submit_urb(cmdinfo->cmd_urb, GFP_ATOMIC); |
876285cc | 603 | if (err) { |
d5f808d3 | 604 | usb_unanchor_urb(cmdinfo->cmd_urb); |
1ad7ed5a | 605 | uas_log_cmd_state(cmnd, "cmd submit err", err); |
115bb1ff MW |
606 | return SCSI_MLQUEUE_DEVICE_BUSY; |
607 | } | |
a0e39e34 | 608 | cmdinfo->cmd_urb = NULL; |
115bb1ff | 609 | cmdinfo->state &= ~SUBMIT_CMD_URB; |
b1d67693 | 610 | cmdinfo->state |= COMMAND_INFLIGHT; |
115bb1ff MW |
611 | } |
612 | ||
613 | return 0; | |
614 | } | |
615 | ||
f281233d | 616 | static int uas_queuecommand_lck(struct scsi_cmnd *cmnd, |
115bb1ff MW |
617 | void (*done)(struct scsi_cmnd *)) |
618 | { | |
619 | struct scsi_device *sdev = cmnd->device; | |
620 | struct uas_dev_info *devinfo = sdev->hostdata; | |
621 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
e0648520 | 622 | unsigned long flags; |
e28e2f2f | 623 | int idx, err; |
115bb1ff MW |
624 | |
625 | BUILD_BUG_ON(sizeof(struct uas_cmd_info) > sizeof(struct scsi_pointer)); | |
626 | ||
f9dc024a HG |
627 | /* Re-check scsi_block_requests now that we've the host-lock */ |
628 | if (cmnd->device->host->host_self_blocked) | |
629 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
630 | ||
59307852 HG |
631 | if ((devinfo->flags & US_FL_NO_ATA_1X) && |
632 | (cmnd->cmnd[0] == ATA_12 || cmnd->cmnd[0] == ATA_16)) { | |
633 | memcpy(cmnd->sense_buffer, usb_stor_sense_invalidCDB, | |
634 | sizeof(usb_stor_sense_invalidCDB)); | |
635 | cmnd->result = SAM_STAT_CHECK_CONDITION; | |
636 | cmnd->scsi_done(cmnd); | |
637 | return 0; | |
638 | } | |
639 | ||
c6f63207 HG |
640 | spin_lock_irqsave(&devinfo->lock, flags); |
641 | ||
f8be6bfc GH |
642 | if (devinfo->resetting) { |
643 | cmnd->result = DID_ERROR << 16; | |
644 | cmnd->scsi_done(cmnd); | |
c6f63207 | 645 | spin_unlock_irqrestore(&devinfo->lock, flags); |
f8be6bfc GH |
646 | return 0; |
647 | } | |
648 | ||
e28e2f2f HG |
649 | /* Find a free uas-tag */ |
650 | for (idx = 0; idx < devinfo->qdepth; idx++) { | |
651 | if (!devinfo->cmnd[idx]) | |
652 | break; | |
653 | } | |
654 | if (idx == devinfo->qdepth) { | |
e0648520 | 655 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff | 656 | return SCSI_MLQUEUE_DEVICE_BUSY; |
e0648520 | 657 | } |
115bb1ff | 658 | |
115bb1ff MW |
659 | cmnd->scsi_done = done; |
660 | ||
5e61aede | 661 | memset(cmdinfo, 0, sizeof(*cmdinfo)); |
e28e2f2f | 662 | cmdinfo->uas_tag = idx + 1; /* uas-tag == usb-stream-id, so 1 based */ |
e0620001 | 663 | cmdinfo->state = SUBMIT_STATUS_URB | ALLOC_CMD_URB | SUBMIT_CMD_URB; |
115bb1ff MW |
664 | |
665 | switch (cmnd->sc_data_direction) { | |
666 | case DMA_FROM_DEVICE: | |
667 | cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB; | |
668 | break; | |
669 | case DMA_BIDIRECTIONAL: | |
670 | cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB; | |
671 | case DMA_TO_DEVICE: | |
672 | cmdinfo->state |= ALLOC_DATA_OUT_URB | SUBMIT_DATA_OUT_URB; | |
673 | case DMA_NONE: | |
674 | break; | |
675 | } | |
676 | ||
e28e2f2f | 677 | if (!devinfo->use_streams) |
db32de11 | 678 | cmdinfo->state &= ~(SUBMIT_DATA_IN_URB | SUBMIT_DATA_OUT_URB); |
115bb1ff | 679 | |
b36d8391 | 680 | err = uas_submit_urbs(cmnd, devinfo); |
115bb1ff MW |
681 | if (err) { |
682 | /* If we did nothing, give up now */ | |
92a3f767 | 683 | if (cmdinfo->state & SUBMIT_STATUS_URB) { |
e0648520 | 684 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
685 | return SCSI_MLQUEUE_DEVICE_BUSY; |
686 | } | |
1bf8198e | 687 | uas_add_work(cmdinfo); |
115bb1ff MW |
688 | } |
689 | ||
e28e2f2f | 690 | devinfo->cmnd[idx] = cmnd; |
e0648520 | 691 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
692 | return 0; |
693 | } | |
694 | ||
f281233d JG |
695 | static DEF_SCSI_QCMD(uas_queuecommand) |
696 | ||
616f0e6c HG |
697 | /* |
698 | * For now we do not support actually sending an abort to the device, so | |
699 | * this eh always fails. Still we must define it to make sure that we've | |
700 | * dropped all references to the cmnd in question once this function exits. | |
701 | */ | |
702 | static int uas_eh_abort_handler(struct scsi_cmnd *cmnd) | |
115bb1ff | 703 | { |
616f0e6c HG |
704 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; |
705 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; | |
706 | struct urb *data_in_urb = NULL; | |
707 | struct urb *data_out_urb = NULL; | |
e0648520 | 708 | unsigned long flags; |
115bb1ff | 709 | |
e0648520 | 710 | spin_lock_irqsave(&devinfo->lock, flags); |
b83b86a3 | 711 | |
1ad7ed5a | 712 | uas_log_cmd_state(cmnd, __func__, 0); |
c6f63207 | 713 | |
616f0e6c HG |
714 | /* Ensure that try_complete does not call scsi_done */ |
715 | cmdinfo->state |= COMMAND_ABORTED; | |
b83b86a3 | 716 | |
616f0e6c | 717 | /* Drop all refs to this cmnd, kill data urbs to break their ref */ |
e28e2f2f | 718 | devinfo->cmnd[cmdinfo->uas_tag - 1] = NULL; |
616f0e6c HG |
719 | if (cmdinfo->state & DATA_IN_URB_INFLIGHT) |
720 | data_in_urb = usb_get_urb(cmdinfo->data_in_urb); | |
721 | if (cmdinfo->state & DATA_OUT_URB_INFLIGHT) | |
722 | data_out_urb = usb_get_urb(cmdinfo->data_out_urb); | |
e0648520 | 723 | |
4c5481ef | 724 | uas_free_unsubmitted_urbs(cmnd); |
b83b86a3 | 725 | |
b83b86a3 HG |
726 | spin_unlock_irqrestore(&devinfo->lock, flags); |
727 | ||
616f0e6c HG |
728 | if (data_in_urb) { |
729 | usb_kill_urb(data_in_urb); | |
730 | usb_put_urb(data_in_urb); | |
c6f63207 | 731 | } |
616f0e6c HG |
732 | if (data_out_urb) { |
733 | usb_kill_urb(data_out_urb); | |
734 | usb_put_urb(data_out_urb); | |
5d390403 | 735 | } |
115bb1ff | 736 | |
616f0e6c | 737 | return FAILED; |
115bb1ff MW |
738 | } |
739 | ||
740 | static int uas_eh_bus_reset_handler(struct scsi_cmnd *cmnd) | |
741 | { | |
742 | struct scsi_device *sdev = cmnd->device; | |
743 | struct uas_dev_info *devinfo = sdev->hostdata; | |
744 | struct usb_device *udev = devinfo->udev; | |
b7b5d11f | 745 | unsigned long flags; |
023b515e | 746 | int err; |
115bb1ff | 747 | |
be326f4c HG |
748 | err = usb_lock_device_for_reset(udev, devinfo->intf); |
749 | if (err) { | |
750 | shost_printk(KERN_ERR, sdev->host, | |
751 | "%s FAILED to get lock err %d\n", __func__, err); | |
752 | return FAILED; | |
753 | } | |
754 | ||
326349f8 | 755 | shost_printk(KERN_INFO, sdev->host, "%s start\n", __func__); |
b7b5d11f HG |
756 | |
757 | spin_lock_irqsave(&devinfo->lock, flags); | |
023b515e | 758 | devinfo->resetting = 1; |
b7b5d11f HG |
759 | spin_unlock_irqrestore(&devinfo->lock, flags); |
760 | ||
a0e39e34 | 761 | usb_kill_anchored_urbs(&devinfo->cmd_urbs); |
023b515e GH |
762 | usb_kill_anchored_urbs(&devinfo->sense_urbs); |
763 | usb_kill_anchored_urbs(&devinfo->data_urbs); | |
1589349f HG |
764 | uas_zap_pending(devinfo, DID_RESET); |
765 | ||
023b515e | 766 | err = usb_reset_device(udev); |
b7b5d11f HG |
767 | |
768 | spin_lock_irqsave(&devinfo->lock, flags); | |
023b515e | 769 | devinfo->resetting = 0; |
b7b5d11f | 770 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff | 771 | |
be326f4c HG |
772 | usb_unlock_device(udev); |
773 | ||
023b515e | 774 | if (err) { |
ce39fe6f HG |
775 | shost_printk(KERN_INFO, sdev->host, "%s FAILED err %d\n", |
776 | __func__, err); | |
023b515e GH |
777 | return FAILED; |
778 | } | |
115bb1ff | 779 | |
023b515e GH |
780 | shost_printk(KERN_INFO, sdev->host, "%s success\n", __func__); |
781 | return SUCCESS; | |
115bb1ff MW |
782 | } |
783 | ||
13630746 HG |
784 | static int uas_target_alloc(struct scsi_target *starget) |
785 | { | |
786 | struct uas_dev_info *devinfo = (struct uas_dev_info *) | |
787 | dev_to_shost(starget->dev.parent)->hostdata; | |
788 | ||
789 | if (devinfo->flags & US_FL_NO_REPORT_LUNS) | |
790 | starget->no_report_luns = 1; | |
791 | ||
792 | return 0; | |
793 | } | |
794 | ||
115bb1ff MW |
795 | static int uas_slave_alloc(struct scsi_device *sdev) |
796 | { | |
ee136af4 HG |
797 | struct uas_dev_info *devinfo = |
798 | (struct uas_dev_info *)sdev->host->hostdata; | |
799 | ||
800 | sdev->hostdata = devinfo; | |
37599f96 | 801 | |
f0183a33 FB |
802 | /* |
803 | * USB has unusual DMA-alignment requirements: Although the | |
37599f96 HG |
804 | * starting address of each scatter-gather element doesn't matter, |
805 | * the length of each element except the last must be divisible | |
806 | * by the Bulk maxpacket value. There's currently no way to | |
807 | * express this by block-layer constraints, so we'll cop out | |
808 | * and simply require addresses to be aligned at 512-byte | |
809 | * boundaries. This is okay since most block I/O involves | |
810 | * hardware sectors that are multiples of 512 bytes in length, | |
811 | * and since host controllers up through USB 2.0 have maxpacket | |
812 | * values no larger than 512. | |
813 | * | |
814 | * But it doesn't suffice for Wireless USB, where Bulk maxpacket | |
815 | * values can be as large as 2048. To make that work properly | |
816 | * will require changes to the block layer. | |
817 | */ | |
818 | blk_queue_update_dma_alignment(sdev->request_queue, (512 - 1)); | |
819 | ||
ee136af4 HG |
820 | if (devinfo->flags & US_FL_MAX_SECTORS_64) |
821 | blk_queue_max_hw_sectors(sdev->request_queue, 64); | |
822 | else if (devinfo->flags & US_FL_MAX_SECTORS_240) | |
823 | blk_queue_max_hw_sectors(sdev->request_queue, 240); | |
824 | ||
115bb1ff MW |
825 | return 0; |
826 | } | |
827 | ||
828 | static int uas_slave_configure(struct scsi_device *sdev) | |
829 | { | |
830 | struct uas_dev_info *devinfo = sdev->hostdata; | |
734016b0 HG |
831 | |
832 | if (devinfo->flags & US_FL_NO_REPORT_OPCODES) | |
833 | sdev->no_report_opcodes = 1; | |
834 | ||
9fa62b1a DK |
835 | /* A few buggy USB-ATA bridges don't understand FUA */ |
836 | if (devinfo->flags & US_FL_BROKEN_FUA) | |
837 | sdev->broken_fua = 1; | |
838 | ||
115bb1ff MW |
839 | return 0; |
840 | } | |
841 | ||
842 | static struct scsi_host_template uas_host_template = { | |
843 | .module = THIS_MODULE, | |
844 | .name = "uas", | |
845 | .queuecommand = uas_queuecommand, | |
13630746 | 846 | .target_alloc = uas_target_alloc, |
115bb1ff MW |
847 | .slave_alloc = uas_slave_alloc, |
848 | .slave_configure = uas_slave_configure, | |
849 | .eh_abort_handler = uas_eh_abort_handler, | |
115bb1ff | 850 | .eh_bus_reset_handler = uas_eh_bus_reset_handler, |
55ff8cfb | 851 | .can_queue = MAX_CMNDS, |
115bb1ff MW |
852 | .this_id = -1, |
853 | .sg_tablesize = SG_NONE, | |
115bb1ff | 854 | .skip_settle_delay = 1, |
115bb1ff MW |
855 | }; |
856 | ||
79b4c061 HG |
857 | #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \ |
858 | vendorName, productName, useProtocol, useTransport, \ | |
859 | initFunction, flags) \ | |
860 | { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \ | |
861 | .driver_info = (flags) } | |
862 | ||
115bb1ff | 863 | static struct usb_device_id uas_usb_ids[] = { |
79b4c061 | 864 | # include "unusual_uas.h" |
115bb1ff MW |
865 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_BULK) }, |
866 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_UAS) }, | |
115bb1ff MW |
867 | { } |
868 | }; | |
869 | MODULE_DEVICE_TABLE(usb, uas_usb_ids); | |
870 | ||
79b4c061 HG |
871 | #undef UNUSUAL_DEV |
872 | ||
e1be067b HG |
873 | static int uas_switch_interface(struct usb_device *udev, |
874 | struct usb_interface *intf) | |
875 | { | |
876 | int alt; | |
877 | ||
878 | alt = uas_find_uas_alt_setting(intf); | |
879 | if (alt < 0) | |
880 | return alt; | |
881 | ||
882 | return usb_set_interface(udev, | |
883 | intf->altsetting[0].desc.bInterfaceNumber, alt); | |
884 | } | |
885 | ||
58d51444 | 886 | static int uas_configure_endpoints(struct uas_dev_info *devinfo) |
34f11e59 HG |
887 | { |
888 | struct usb_host_endpoint *eps[4] = { }; | |
889 | struct usb_device *udev = devinfo->udev; | |
890 | int r; | |
891 | ||
34f11e59 | 892 | r = uas_find_endpoints(devinfo->intf->cur_altsetting, eps); |
74d71aec HG |
893 | if (r) |
894 | return r; | |
895 | ||
896 | devinfo->cmd_pipe = usb_sndbulkpipe(udev, | |
897 | usb_endpoint_num(&eps[0]->desc)); | |
898 | devinfo->status_pipe = usb_rcvbulkpipe(udev, | |
899 | usb_endpoint_num(&eps[1]->desc)); | |
900 | devinfo->data_in_pipe = usb_rcvbulkpipe(udev, | |
901 | usb_endpoint_num(&eps[2]->desc)); | |
902 | devinfo->data_out_pipe = usb_sndbulkpipe(udev, | |
903 | usb_endpoint_num(&eps[3]->desc)); | |
115bb1ff | 904 | |
e5e55819 | 905 | if (udev->speed < USB_SPEED_SUPER) { |
e2875c33 | 906 | devinfo->qdepth = 32; |
115bb1ff MW |
907 | devinfo->use_streams = 0; |
908 | } else { | |
58d51444 | 909 | devinfo->qdepth = usb_alloc_streams(devinfo->intf, eps + 1, |
5e61aede | 910 | 3, MAX_CMNDS, GFP_NOIO); |
58d51444 HG |
911 | if (devinfo->qdepth < 0) |
912 | return devinfo->qdepth; | |
115bb1ff MW |
913 | devinfo->use_streams = 1; |
914 | } | |
58d51444 HG |
915 | |
916 | return 0; | |
115bb1ff MW |
917 | } |
918 | ||
dae51546 SAS |
919 | static void uas_free_streams(struct uas_dev_info *devinfo) |
920 | { | |
921 | struct usb_device *udev = devinfo->udev; | |
922 | struct usb_host_endpoint *eps[3]; | |
923 | ||
924 | eps[0] = usb_pipe_endpoint(udev, devinfo->status_pipe); | |
925 | eps[1] = usb_pipe_endpoint(udev, devinfo->data_in_pipe); | |
926 | eps[2] = usb_pipe_endpoint(udev, devinfo->data_out_pipe); | |
94d72f00 | 927 | usb_free_streams(devinfo->intf, eps, 3, GFP_NOIO); |
dae51546 SAS |
928 | } |
929 | ||
115bb1ff MW |
930 | static int uas_probe(struct usb_interface *intf, const struct usb_device_id *id) |
931 | { | |
6ce8213b HG |
932 | int result = -ENOMEM; |
933 | struct Scsi_Host *shost = NULL; | |
115bb1ff MW |
934 | struct uas_dev_info *devinfo; |
935 | struct usb_device *udev = interface_to_usbdev(intf); | |
a5011d44 | 936 | unsigned long dev_flags; |
115bb1ff | 937 | |
a5011d44 | 938 | if (!uas_use_uas_driver(intf, id, &dev_flags)) |
79b4c061 HG |
939 | return -ENODEV; |
940 | ||
89dc2905 MW |
941 | if (uas_switch_interface(udev, intf)) |
942 | return -ENODEV; | |
115bb1ff | 943 | |
21fc05b6 HG |
944 | shost = scsi_host_alloc(&uas_host_template, |
945 | sizeof(struct uas_dev_info)); | |
115bb1ff | 946 | if (!shost) |
6ce8213b | 947 | goto set_alt0; |
115bb1ff MW |
948 | |
949 | shost->max_cmd_len = 16 + 252; | |
950 | shost->max_id = 1; | |
bde027b4 GH |
951 | shost->max_lun = 256; |
952 | shost->max_channel = 0; | |
115bb1ff MW |
953 | shost->sg_tablesize = udev->bus->sg_tablesize; |
954 | ||
21fc05b6 | 955 | devinfo = (struct uas_dev_info *)shost->hostdata; |
115bb1ff MW |
956 | devinfo->intf = intf; |
957 | devinfo->udev = udev; | |
023b515e | 958 | devinfo->resetting = 0; |
da65c2bb | 959 | devinfo->shutdown = 0; |
a5011d44 | 960 | devinfo->flags = dev_flags; |
a0e39e34 | 961 | init_usb_anchor(&devinfo->cmd_urbs); |
bdd000fb GH |
962 | init_usb_anchor(&devinfo->sense_urbs); |
963 | init_usb_anchor(&devinfo->data_urbs); | |
e0648520 | 964 | spin_lock_init(&devinfo->lock); |
1bf8198e | 965 | INIT_WORK(&devinfo->work, uas_do_work); |
58d51444 HG |
966 | |
967 | result = uas_configure_endpoints(devinfo); | |
968 | if (result) | |
969 | goto set_alt0; | |
115bb1ff | 970 | |
198de51d HG |
971 | /* |
972 | * 1 tag is reserved for untagged commands + | |
973 | * 1 tag to avoid off by one errors in some bridge firmwares | |
974 | */ | |
975 | shost->can_queue = devinfo->qdepth - 2; | |
976 | ||
c637f1fa | 977 | usb_set_intfdata(intf, shost); |
dae51546 SAS |
978 | result = scsi_add_host(shost, &intf->dev); |
979 | if (result) | |
6ce8213b | 980 | goto free_streams; |
dae51546 | 981 | |
115bb1ff | 982 | scsi_scan_host(shost); |
115bb1ff | 983 | return result; |
dae51546 | 984 | |
6ce8213b | 985 | free_streams: |
dae51546 | 986 | uas_free_streams(devinfo); |
c637f1fa | 987 | usb_set_intfdata(intf, NULL); |
6ce8213b HG |
988 | set_alt0: |
989 | usb_set_interface(udev, intf->altsetting[0].desc.bInterfaceNumber, 0); | |
115bb1ff MW |
990 | if (shost) |
991 | scsi_host_put(shost); | |
992 | return result; | |
993 | } | |
994 | ||
f9dc024a HG |
995 | static int uas_cmnd_list_empty(struct uas_dev_info *devinfo) |
996 | { | |
997 | unsigned long flags; | |
998 | int i, r = 1; | |
999 | ||
1000 | spin_lock_irqsave(&devinfo->lock, flags); | |
1001 | ||
1002 | for (i = 0; i < devinfo->qdepth; i++) { | |
1003 | if (devinfo->cmnd[i]) { | |
1004 | r = 0; /* Not empty */ | |
1005 | break; | |
1006 | } | |
1007 | } | |
1008 | ||
1009 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
1010 | ||
1011 | return r; | |
1012 | } | |
1013 | ||
1014 | /* | |
1015 | * Wait for any pending cmnds to complete, on usb-2 sense_urbs may temporarily | |
1016 | * get empty while there still is more work to do due to sense-urbs completing | |
1017 | * with a READ/WRITE_READY iu code, so keep waiting until the list gets empty. | |
1018 | */ | |
1019 | static int uas_wait_for_pending_cmnds(struct uas_dev_info *devinfo) | |
1020 | { | |
1021 | unsigned long start_time; | |
1022 | int r; | |
1023 | ||
1024 | start_time = jiffies; | |
1025 | do { | |
1026 | flush_work(&devinfo->work); | |
1027 | ||
1028 | r = usb_wait_anchor_empty_timeout(&devinfo->sense_urbs, 5000); | |
1029 | if (r == 0) | |
1030 | return -ETIME; | |
1031 | ||
1032 | r = usb_wait_anchor_empty_timeout(&devinfo->data_urbs, 500); | |
1033 | if (r == 0) | |
1034 | return -ETIME; | |
1035 | ||
1036 | if (time_after(jiffies, start_time + 5 * HZ)) | |
1037 | return -ETIME; | |
1038 | } while (!uas_cmnd_list_empty(devinfo)); | |
1039 | ||
1040 | return 0; | |
1041 | } | |
1042 | ||
115bb1ff MW |
1043 | static int uas_pre_reset(struct usb_interface *intf) |
1044 | { | |
4de7a373 | 1045 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
21fc05b6 | 1046 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
4de7a373 HG |
1047 | unsigned long flags; |
1048 | ||
da65c2bb HG |
1049 | if (devinfo->shutdown) |
1050 | return 0; | |
1051 | ||
4de7a373 HG |
1052 | /* Block new requests */ |
1053 | spin_lock_irqsave(shost->host_lock, flags); | |
1054 | scsi_block_requests(shost); | |
1055 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1056 | ||
f9dc024a | 1057 | if (uas_wait_for_pending_cmnds(devinfo) != 0) { |
4de7a373 | 1058 | shost_printk(KERN_ERR, shost, "%s: timed out\n", __func__); |
f9dc024a | 1059 | scsi_unblock_requests(shost); |
4de7a373 HG |
1060 | return 1; |
1061 | } | |
1062 | ||
1063 | uas_free_streams(devinfo); | |
1064 | ||
115bb1ff MW |
1065 | return 0; |
1066 | } | |
1067 | ||
1068 | static int uas_post_reset(struct usb_interface *intf) | |
1069 | { | |
4de7a373 | 1070 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
21fc05b6 | 1071 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
4de7a373 | 1072 | unsigned long flags; |
ce39fe6f | 1073 | int err; |
4de7a373 | 1074 | |
da65c2bb HG |
1075 | if (devinfo->shutdown) |
1076 | return 0; | |
1077 | ||
ce39fe6f HG |
1078 | err = uas_configure_endpoints(devinfo); |
1079 | if (err) { | |
58d51444 | 1080 | shost_printk(KERN_ERR, shost, |
ce39fe6f HG |
1081 | "%s: alloc streams error %d after reset", |
1082 | __func__, err); | |
58d51444 HG |
1083 | return 1; |
1084 | } | |
4de7a373 HG |
1085 | |
1086 | spin_lock_irqsave(shost->host_lock, flags); | |
1087 | scsi_report_bus_reset(shost, 0); | |
1088 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1089 | ||
1090 | scsi_unblock_requests(shost); | |
1091 | ||
115bb1ff MW |
1092 | return 0; |
1093 | } | |
1094 | ||
0df1f663 HG |
1095 | static int uas_suspend(struct usb_interface *intf, pm_message_t message) |
1096 | { | |
1097 | struct Scsi_Host *shost = usb_get_intfdata(intf); | |
21fc05b6 | 1098 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
0df1f663 | 1099 | |
f9dc024a | 1100 | if (uas_wait_for_pending_cmnds(devinfo) != 0) { |
0df1f663 HG |
1101 | shost_printk(KERN_ERR, shost, "%s: timed out\n", __func__); |
1102 | return -ETIME; | |
1103 | } | |
1104 | ||
1105 | return 0; | |
1106 | } | |
1107 | ||
1108 | static int uas_resume(struct usb_interface *intf) | |
1109 | { | |
1110 | return 0; | |
1111 | } | |
1112 | ||
1113 | static int uas_reset_resume(struct usb_interface *intf) | |
1114 | { | |
1115 | struct Scsi_Host *shost = usb_get_intfdata(intf); | |
21fc05b6 | 1116 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
0df1f663 | 1117 | unsigned long flags; |
ce39fe6f | 1118 | int err; |
0df1f663 | 1119 | |
ce39fe6f HG |
1120 | err = uas_configure_endpoints(devinfo); |
1121 | if (err) { | |
0df1f663 | 1122 | shost_printk(KERN_ERR, shost, |
ce39fe6f HG |
1123 | "%s: alloc streams error %d after reset", |
1124 | __func__, err); | |
0df1f663 HG |
1125 | return -EIO; |
1126 | } | |
1127 | ||
1128 | spin_lock_irqsave(shost->host_lock, flags); | |
1129 | scsi_report_bus_reset(shost, 0); | |
1130 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1131 | ||
1132 | return 0; | |
1133 | } | |
1134 | ||
115bb1ff MW |
1135 | static void uas_disconnect(struct usb_interface *intf) |
1136 | { | |
115bb1ff | 1137 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
21fc05b6 | 1138 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
b7b5d11f | 1139 | unsigned long flags; |
115bb1ff | 1140 | |
b7b5d11f | 1141 | spin_lock_irqsave(&devinfo->lock, flags); |
4c456971 | 1142 | devinfo->resetting = 1; |
b7b5d11f HG |
1143 | spin_unlock_irqrestore(&devinfo->lock, flags); |
1144 | ||
1bf8198e | 1145 | cancel_work_sync(&devinfo->work); |
a0e39e34 | 1146 | usb_kill_anchored_urbs(&devinfo->cmd_urbs); |
bdd000fb GH |
1147 | usb_kill_anchored_urbs(&devinfo->sense_urbs); |
1148 | usb_kill_anchored_urbs(&devinfo->data_urbs); | |
1589349f HG |
1149 | uas_zap_pending(devinfo, DID_NO_CONNECT); |
1150 | ||
4c456971 | 1151 | scsi_remove_host(shost); |
dae51546 | 1152 | uas_free_streams(devinfo); |
21fc05b6 | 1153 | scsi_host_put(shost); |
115bb1ff MW |
1154 | } |
1155 | ||
da65c2bb HG |
1156 | /* |
1157 | * Put the device back in usb-storage mode on shutdown, as some BIOS-es | |
1158 | * hang on reboot when the device is still in uas mode. Note the reset is | |
1159 | * necessary as some devices won't revert to usb-storage mode without it. | |
1160 | */ | |
1161 | static void uas_shutdown(struct device *dev) | |
1162 | { | |
1163 | struct usb_interface *intf = to_usb_interface(dev); | |
1164 | struct usb_device *udev = interface_to_usbdev(intf); | |
1165 | struct Scsi_Host *shost = usb_get_intfdata(intf); | |
21fc05b6 | 1166 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
da65c2bb HG |
1167 | |
1168 | if (system_state != SYSTEM_RESTART) | |
1169 | return; | |
1170 | ||
1171 | devinfo->shutdown = 1; | |
1172 | uas_free_streams(devinfo); | |
1173 | usb_set_interface(udev, intf->altsetting[0].desc.bInterfaceNumber, 0); | |
1174 | usb_reset_device(udev); | |
1175 | } | |
1176 | ||
115bb1ff MW |
1177 | static struct usb_driver uas_driver = { |
1178 | .name = "uas", | |
1179 | .probe = uas_probe, | |
1180 | .disconnect = uas_disconnect, | |
1181 | .pre_reset = uas_pre_reset, | |
1182 | .post_reset = uas_post_reset, | |
0df1f663 HG |
1183 | .suspend = uas_suspend, |
1184 | .resume = uas_resume, | |
1185 | .reset_resume = uas_reset_resume, | |
da65c2bb | 1186 | .drvwrap.driver.shutdown = uas_shutdown, |
115bb1ff MW |
1187 | .id_table = uas_usb_ids, |
1188 | }; | |
1189 | ||
65db4305 | 1190 | module_usb_driver(uas_driver); |
115bb1ff MW |
1191 | |
1192 | MODULE_LICENSE("GPL"); | |
f50a4968 HG |
1193 | MODULE_AUTHOR( |
1194 | "Hans de Goede <hdegoede@redhat.com>, Matthew Wilcox and Sarah Sharp"); |