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 | * | |
5df2be63 | 5 | * Copyright Hans de Goede <hdegoede@redhat.com> for Red Hat, Inc. 2013 - 2014 |
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 HG |
33 | #define MAX_CMNDS 256 |
34 | ||
115bb1ff MW |
35 | /* |
36 | * The r00-r01c specs define this version of the SENSE IU data structure. | |
37 | * It's still in use by several different firmware releases. | |
38 | */ | |
39 | struct sense_iu_old { | |
40 | __u8 iu_id; | |
41 | __u8 rsvd1; | |
42 | __be16 tag; | |
43 | __be16 len; | |
44 | __u8 status; | |
45 | __u8 service_response; | |
46 | __u8 sense[SCSI_SENSE_BUFFERSIZE]; | |
47 | }; | |
48 | ||
115bb1ff MW |
49 | struct uas_dev_info { |
50 | struct usb_interface *intf; | |
51 | struct usb_device *udev; | |
a0e39e34 | 52 | struct usb_anchor cmd_urbs; |
bdd000fb GH |
53 | struct usb_anchor sense_urbs; |
54 | struct usb_anchor data_urbs; | |
59307852 | 55 | unsigned long flags; |
023b515e | 56 | int qdepth, resetting; |
115bb1ff MW |
57 | unsigned cmd_pipe, status_pipe, data_in_pipe, data_out_pipe; |
58 | unsigned use_streams:1; | |
59 | unsigned uas_sense_old:1; | |
da65c2bb | 60 | unsigned shutdown:1; |
5e61aede | 61 | struct scsi_cmnd *cmnd[MAX_CMNDS]; |
e0648520 | 62 | spinlock_t lock; |
1bf8198e | 63 | struct work_struct work; |
115bb1ff MW |
64 | }; |
65 | ||
66 | enum { | |
92a3f767 | 67 | SUBMIT_STATUS_URB = (1 << 1), |
115bb1ff MW |
68 | ALLOC_DATA_IN_URB = (1 << 2), |
69 | SUBMIT_DATA_IN_URB = (1 << 3), | |
70 | ALLOC_DATA_OUT_URB = (1 << 4), | |
71 | SUBMIT_DATA_OUT_URB = (1 << 5), | |
72 | ALLOC_CMD_URB = (1 << 6), | |
73 | SUBMIT_CMD_URB = (1 << 7), | |
b1d67693 GH |
74 | COMMAND_INFLIGHT = (1 << 8), |
75 | DATA_IN_URB_INFLIGHT = (1 << 9), | |
76 | DATA_OUT_URB_INFLIGHT = (1 << 10), | |
eb7d664a HG |
77 | COMMAND_ABORTED = (1 << 11), |
78 | IS_IN_WORK_LIST = (1 << 12), | |
115bb1ff MW |
79 | }; |
80 | ||
81 | /* Overrides scsi_pointer */ | |
82 | struct uas_cmd_info { | |
83 | unsigned int state; | |
84 | unsigned int stream; | |
85 | struct urb *cmd_urb; | |
115bb1ff MW |
86 | struct urb *data_in_urb; |
87 | struct urb *data_out_urb; | |
115bb1ff MW |
88 | }; |
89 | ||
90 | /* I hate forward declarations, but I actually have a loop */ | |
91 | static int uas_submit_urbs(struct scsi_cmnd *cmnd, | |
92 | struct uas_dev_info *devinfo, gfp_t gfp); | |
ea9da1c7 | 93 | static void uas_do_work(struct work_struct *work); |
4c456971 | 94 | static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller); |
d89bd835 | 95 | static void uas_free_streams(struct uas_dev_info *devinfo); |
326349f8 | 96 | static void uas_log_cmd_state(struct scsi_cmnd *cmnd, const char *caller); |
115bb1ff | 97 | |
115bb1ff MW |
98 | static void uas_do_work(struct work_struct *work) |
99 | { | |
1bf8198e GH |
100 | struct uas_dev_info *devinfo = |
101 | container_of(work, struct uas_dev_info, work); | |
115bb1ff | 102 | struct uas_cmd_info *cmdinfo; |
43cd99cb | 103 | struct scsi_cmnd *cmnd; |
e0648520 | 104 | unsigned long flags; |
43cd99cb | 105 | int i, err; |
115bb1ff | 106 | |
1bf8198e | 107 | spin_lock_irqsave(&devinfo->lock, flags); |
b7b5d11f HG |
108 | |
109 | if (devinfo->resetting) | |
110 | goto out; | |
111 | ||
43cd99cb HG |
112 | for (i = 0; i < devinfo->qdepth; i++) { |
113 | if (!devinfo->cmnd[i]) | |
114 | continue; | |
115 | ||
116 | cmnd = devinfo->cmnd[i]; | |
117 | cmdinfo = (void *)&cmnd->SCp; | |
61c09ce5 HG |
118 | |
119 | if (!(cmdinfo->state & IS_IN_WORK_LIST)) | |
120 | continue; | |
121 | ||
e7eda932 | 122 | err = uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_ATOMIC); |
61c09ce5 | 123 | if (!err) |
efefecf3 | 124 | cmdinfo->state &= ~IS_IN_WORK_LIST; |
61c09ce5 | 125 | else |
1bf8198e | 126 | schedule_work(&devinfo->work); |
115bb1ff | 127 | } |
b7b5d11f | 128 | out: |
1bf8198e | 129 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
130 | } |
131 | ||
1bf8198e GH |
132 | static void uas_add_work(struct uas_cmd_info *cmdinfo) |
133 | { | |
134 | struct scsi_pointer *scp = (void *)cmdinfo; | |
135 | struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, SCp); | |
136 | struct uas_dev_info *devinfo = cmnd->device->hostdata; | |
137 | ||
ab945eff | 138 | lockdep_assert_held(&devinfo->lock); |
1bf8198e GH |
139 | cmdinfo->state |= IS_IN_WORK_LIST; |
140 | schedule_work(&devinfo->work); | |
141 | } | |
142 | ||
1589349f | 143 | static void uas_zap_pending(struct uas_dev_info *devinfo, int result) |
326349f8 GH |
144 | { |
145 | struct uas_cmd_info *cmdinfo; | |
43cd99cb | 146 | struct scsi_cmnd *cmnd; |
326349f8 | 147 | unsigned long flags; |
43cd99cb | 148 | int i, err; |
326349f8 GH |
149 | |
150 | spin_lock_irqsave(&devinfo->lock, flags); | |
43cd99cb HG |
151 | for (i = 0; i < devinfo->qdepth; i++) { |
152 | if (!devinfo->cmnd[i]) | |
153 | continue; | |
154 | ||
155 | cmnd = devinfo->cmnd[i]; | |
156 | cmdinfo = (void *)&cmnd->SCp; | |
326349f8 | 157 | uas_log_cmd_state(cmnd, __func__); |
9c15c573 HG |
158 | /* Sense urbs were killed, clear COMMAND_INFLIGHT manually */ |
159 | cmdinfo->state &= ~COMMAND_INFLIGHT; | |
1589349f | 160 | cmnd->result = result << 16; |
9c15c573 HG |
161 | err = uas_try_complete(cmnd, __func__); |
162 | WARN_ON(err != 0); | |
326349f8 GH |
163 | } |
164 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
165 | } | |
166 | ||
115bb1ff MW |
167 | static void uas_sense(struct urb *urb, struct scsi_cmnd *cmnd) |
168 | { | |
169 | struct sense_iu *sense_iu = urb->transfer_buffer; | |
170 | struct scsi_device *sdev = cmnd->device; | |
171 | ||
172 | if (urb->actual_length > 16) { | |
173 | unsigned len = be16_to_cpup(&sense_iu->len); | |
174 | if (len + 16 != urb->actual_length) { | |
175 | int newlen = min(len + 16, urb->actual_length) - 16; | |
176 | if (newlen < 0) | |
177 | newlen = 0; | |
178 | sdev_printk(KERN_INFO, sdev, "%s: urb length %d " | |
179 | "disagrees with IU sense data length %d, " | |
180 | "using %d bytes of sense data\n", __func__, | |
181 | urb->actual_length, len, newlen); | |
182 | len = newlen; | |
183 | } | |
184 | memcpy(cmnd->sense_buffer, sense_iu->sense, len); | |
185 | } | |
186 | ||
187 | cmnd->result = sense_iu->status; | |
115bb1ff MW |
188 | } |
189 | ||
190 | static void uas_sense_old(struct urb *urb, struct scsi_cmnd *cmnd) | |
191 | { | |
192 | struct sense_iu_old *sense_iu = urb->transfer_buffer; | |
193 | struct scsi_device *sdev = cmnd->device; | |
194 | ||
195 | if (urb->actual_length > 8) { | |
196 | unsigned len = be16_to_cpup(&sense_iu->len) - 2; | |
197 | if (len + 8 != urb->actual_length) { | |
198 | int newlen = min(len + 8, urb->actual_length) - 8; | |
199 | if (newlen < 0) | |
200 | newlen = 0; | |
201 | sdev_printk(KERN_INFO, sdev, "%s: urb length %d " | |
202 | "disagrees with IU sense data length %d, " | |
203 | "using %d bytes of sense data\n", __func__, | |
204 | urb->actual_length, len, newlen); | |
205 | len = newlen; | |
206 | } | |
207 | memcpy(cmnd->sense_buffer, sense_iu->sense, len); | |
208 | } | |
209 | ||
210 | cmnd->result = sense_iu->status; | |
b1d67693 GH |
211 | } |
212 | ||
e0620001 HG |
213 | /* |
214 | * scsi-tags go from 0 - (nr_tags - 1), uas tags need to match stream-ids, | |
215 | * which go from 1 - nr_streams. And we use 1 for untagged commands. | |
216 | */ | |
217 | static int uas_get_tag(struct scsi_cmnd *cmnd) | |
218 | { | |
219 | int tag; | |
220 | ||
221 | if (blk_rq_tagged(cmnd->request)) | |
222 | tag = cmnd->request->tag + 2; | |
223 | else | |
224 | tag = 1; | |
225 | ||
226 | return tag; | |
227 | } | |
228 | ||
b1d67693 GH |
229 | static void uas_log_cmd_state(struct scsi_cmnd *cmnd, const char *caller) |
230 | { | |
231 | struct uas_cmd_info *ci = (void *)&cmnd->SCp; | |
232 | ||
60d9f67d | 233 | scmd_printk(KERN_INFO, cmnd, |
eb7d664a | 234 | "%s tag %d inflight:%s%s%s%s%s%s%s%s%s%s%s%s ", |
6dcd8ec2 | 235 | caller, uas_get_tag(cmnd), |
b1d67693 GH |
236 | (ci->state & SUBMIT_STATUS_URB) ? " s-st" : "", |
237 | (ci->state & ALLOC_DATA_IN_URB) ? " a-in" : "", | |
238 | (ci->state & SUBMIT_DATA_IN_URB) ? " s-in" : "", | |
239 | (ci->state & ALLOC_DATA_OUT_URB) ? " a-out" : "", | |
240 | (ci->state & SUBMIT_DATA_OUT_URB) ? " s-out" : "", | |
241 | (ci->state & ALLOC_CMD_URB) ? " a-cmd" : "", | |
242 | (ci->state & SUBMIT_CMD_URB) ? " s-cmd" : "", | |
243 | (ci->state & COMMAND_INFLIGHT) ? " CMD" : "", | |
244 | (ci->state & DATA_IN_URB_INFLIGHT) ? " IN" : "", | |
245 | (ci->state & DATA_OUT_URB_INFLIGHT) ? " OUT" : "", | |
b06e48af | 246 | (ci->state & COMMAND_ABORTED) ? " abort" : "", |
efefecf3 | 247 | (ci->state & IS_IN_WORK_LIST) ? " work" : ""); |
6dcd8ec2 | 248 | scsi_print_command(cmnd); |
b1d67693 GH |
249 | } |
250 | ||
4c5481ef HG |
251 | static void uas_free_unsubmitted_urbs(struct scsi_cmnd *cmnd) |
252 | { | |
253 | struct uas_cmd_info *cmdinfo; | |
254 | ||
255 | if (!cmnd) | |
256 | return; | |
257 | ||
258 | cmdinfo = (void *)&cmnd->SCp; | |
259 | ||
260 | if (cmdinfo->state & SUBMIT_CMD_URB) | |
261 | usb_free_urb(cmdinfo->cmd_urb); | |
262 | ||
263 | /* data urbs may have never gotten their submit flag set */ | |
264 | if (!(cmdinfo->state & DATA_IN_URB_INFLIGHT)) | |
265 | usb_free_urb(cmdinfo->data_in_urb); | |
266 | if (!(cmdinfo->state & DATA_OUT_URB_INFLIGHT)) | |
267 | usb_free_urb(cmdinfo->data_out_urb); | |
268 | } | |
269 | ||
b1d67693 GH |
270 | static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller) |
271 | { | |
272 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
e0648520 | 273 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
b1d67693 | 274 | |
ab945eff | 275 | lockdep_assert_held(&devinfo->lock); |
b1d67693 GH |
276 | if (cmdinfo->state & (COMMAND_INFLIGHT | |
277 | DATA_IN_URB_INFLIGHT | | |
616f0e6c HG |
278 | DATA_OUT_URB_INFLIGHT | |
279 | COMMAND_ABORTED)) | |
b1d67693 | 280 | return -EBUSY; |
5e61aede | 281 | devinfo->cmnd[uas_get_tag(cmnd) - 1] = NULL; |
4c5481ef | 282 | uas_free_unsubmitted_urbs(cmnd); |
c621a81e | 283 | cmnd->scsi_done(cmnd); |
b1d67693 | 284 | return 0; |
115bb1ff MW |
285 | } |
286 | ||
287 | static void uas_xfer_data(struct urb *urb, struct scsi_cmnd *cmnd, | |
b1d67693 | 288 | unsigned direction) |
115bb1ff MW |
289 | { |
290 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
291 | int err; | |
292 | ||
b1d67693 | 293 | cmdinfo->state |= direction | SUBMIT_STATUS_URB; |
115bb1ff MW |
294 | err = uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_ATOMIC); |
295 | if (err) { | |
1bf8198e | 296 | uas_add_work(cmdinfo); |
115bb1ff MW |
297 | } |
298 | } | |
299 | ||
300 | static void uas_stat_cmplt(struct urb *urb) | |
301 | { | |
302 | struct iu *iu = urb->transfer_buffer; | |
22188f4a | 303 | struct Scsi_Host *shost = urb->context; |
21fc05b6 | 304 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
60d9f67d HG |
305 | struct urb *data_in_urb = NULL; |
306 | struct urb *data_out_urb = NULL; | |
115bb1ff | 307 | struct scsi_cmnd *cmnd; |
b1d67693 | 308 | struct uas_cmd_info *cmdinfo; |
e0648520 | 309 | unsigned long flags; |
5e61aede | 310 | unsigned int idx; |
115bb1ff | 311 | |
b7b5d11f HG |
312 | spin_lock_irqsave(&devinfo->lock, flags); |
313 | ||
314 | if (devinfo->resetting) | |
315 | goto out; | |
316 | ||
115bb1ff | 317 | if (urb->status) { |
51b36173 | 318 | if (urb->status != -ENOENT && urb->status != -ECONNRESET) { |
326349f8 GH |
319 | dev_err(&urb->dev->dev, "stat urb: status %d\n", |
320 | urb->status); | |
321 | } | |
b7b5d11f | 322 | goto out; |
023b515e GH |
323 | } |
324 | ||
5e61aede HG |
325 | idx = be16_to_cpup(&iu->tag) - 1; |
326 | if (idx >= MAX_CMNDS || !devinfo->cmnd[idx]) { | |
327 | dev_err(&urb->dev->dev, | |
328 | "stat urb: no pending cmd for tag %d\n", idx + 1); | |
b7b5d11f | 329 | goto out; |
5e61aede | 330 | } |
115bb1ff | 331 | |
5e61aede | 332 | cmnd = devinfo->cmnd[idx]; |
e0423dee | 333 | cmdinfo = (void *)&cmnd->SCp; |
d89da03a HG |
334 | |
335 | if (!(cmdinfo->state & COMMAND_INFLIGHT)) { | |
336 | scmd_printk(KERN_ERR, cmnd, "unexpected status cmplt\n"); | |
337 | goto out; | |
338 | } | |
339 | ||
115bb1ff MW |
340 | switch (iu->iu_id) { |
341 | case IU_ID_STATUS: | |
342 | if (urb->actual_length < 16) | |
343 | devinfo->uas_sense_old = 1; | |
344 | if (devinfo->uas_sense_old) | |
345 | uas_sense_old(urb, cmnd); | |
346 | else | |
347 | uas_sense(urb, cmnd); | |
8aac863e GH |
348 | if (cmnd->result != 0) { |
349 | /* cancel data transfers on error */ | |
60d9f67d HG |
350 | data_in_urb = usb_get_urb(cmdinfo->data_in_urb); |
351 | data_out_urb = usb_get_urb(cmdinfo->data_out_urb); | |
8aac863e | 352 | } |
b1d67693 GH |
353 | cmdinfo->state &= ~COMMAND_INFLIGHT; |
354 | uas_try_complete(cmnd, __func__); | |
115bb1ff MW |
355 | break; |
356 | case IU_ID_READ_READY: | |
8e453155 HG |
357 | if (!cmdinfo->data_in_urb || |
358 | (cmdinfo->state & DATA_IN_URB_INFLIGHT)) { | |
359 | scmd_printk(KERN_ERR, cmnd, "unexpected read rdy\n"); | |
360 | break; | |
361 | } | |
115bb1ff MW |
362 | uas_xfer_data(urb, cmnd, SUBMIT_DATA_IN_URB); |
363 | break; | |
364 | case IU_ID_WRITE_READY: | |
8e453155 HG |
365 | if (!cmdinfo->data_out_urb || |
366 | (cmdinfo->state & DATA_OUT_URB_INFLIGHT)) { | |
367 | scmd_printk(KERN_ERR, cmnd, "unexpected write rdy\n"); | |
368 | break; | |
369 | } | |
115bb1ff MW |
370 | uas_xfer_data(urb, cmnd, SUBMIT_DATA_OUT_URB); |
371 | break; | |
372 | default: | |
373 | scmd_printk(KERN_ERR, cmnd, | |
374 | "Bogus IU (%d) received on status pipe\n", iu->iu_id); | |
375 | } | |
b7b5d11f | 376 | out: |
e9bd7e1a | 377 | usb_free_urb(urb); |
e0648520 | 378 | spin_unlock_irqrestore(&devinfo->lock, flags); |
60d9f67d HG |
379 | |
380 | /* Unlinking of data urbs must be done without holding the lock */ | |
381 | if (data_in_urb) { | |
382 | usb_unlink_urb(data_in_urb); | |
383 | usb_put_urb(data_in_urb); | |
384 | } | |
385 | if (data_out_urb) { | |
386 | usb_unlink_urb(data_out_urb); | |
387 | usb_put_urb(data_out_urb); | |
388 | } | |
115bb1ff MW |
389 | } |
390 | ||
c621a81e | 391 | static void uas_data_cmplt(struct urb *urb) |
115bb1ff | 392 | { |
b1d67693 GH |
393 | struct scsi_cmnd *cmnd = urb->context; |
394 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
e0648520 | 395 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
b1d67693 | 396 | struct scsi_data_buffer *sdb = NULL; |
e0648520 | 397 | unsigned long flags; |
b1d67693 | 398 | |
e0648520 | 399 | spin_lock_irqsave(&devinfo->lock, flags); |
b7b5d11f | 400 | |
b1d67693 GH |
401 | if (cmdinfo->data_in_urb == urb) { |
402 | sdb = scsi_in(cmnd); | |
403 | cmdinfo->state &= ~DATA_IN_URB_INFLIGHT; | |
85fea825 | 404 | cmdinfo->data_in_urb = NULL; |
b1d67693 GH |
405 | } else if (cmdinfo->data_out_urb == urb) { |
406 | sdb = scsi_out(cmnd); | |
407 | cmdinfo->state &= ~DATA_OUT_URB_INFLIGHT; | |
85fea825 | 408 | cmdinfo->data_out_urb = NULL; |
b1d67693 | 409 | } |
f491ecbb GH |
410 | if (sdb == NULL) { |
411 | WARN_ON_ONCE(1); | |
b7b5d11f HG |
412 | goto out; |
413 | } | |
414 | ||
415 | if (devinfo->resetting) | |
416 | goto out; | |
417 | ||
d89da03a HG |
418 | /* Data urbs should not complete before the cmd urb is submitted */ |
419 | if (cmdinfo->state & SUBMIT_CMD_URB) { | |
420 | scmd_printk(KERN_ERR, cmnd, "unexpected data cmplt\n"); | |
421 | goto out; | |
422 | } | |
423 | ||
b7b5d11f | 424 | if (urb->status) { |
51b36173 | 425 | if (urb->status != -ENOENT && urb->status != -ECONNRESET) { |
876285cc HG |
426 | uas_log_cmd_state(cmnd, __func__); |
427 | scmd_printk(KERN_ERR, cmnd, | |
428 | "data cmplt err %d stream %d\n", | |
429 | urb->status, urb->stream_id); | |
430 | } | |
8aac863e GH |
431 | /* error: no data transfered */ |
432 | sdb->resid = sdb->length; | |
433 | } else { | |
434 | sdb->resid = sdb->length - urb->actual_length; | |
435 | } | |
b1d67693 | 436 | uas_try_complete(cmnd, __func__); |
b7b5d11f | 437 | out: |
85fea825 | 438 | usb_free_urb(urb); |
e0648520 | 439 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
440 | } |
441 | ||
876285cc HG |
442 | static void uas_cmd_cmplt(struct urb *urb) |
443 | { | |
b6823c51 HG |
444 | if (urb->status) |
445 | dev_err(&urb->dev->dev, "cmd cmplt err %d\n", urb->status); | |
876285cc | 446 | |
876285cc HG |
447 | usb_free_urb(urb); |
448 | } | |
449 | ||
115bb1ff | 450 | static struct urb *uas_alloc_data_urb(struct uas_dev_info *devinfo, gfp_t gfp, |
b1d67693 GH |
451 | unsigned int pipe, u16 stream_id, |
452 | struct scsi_cmnd *cmnd, | |
453 | enum dma_data_direction dir) | |
115bb1ff MW |
454 | { |
455 | struct usb_device *udev = devinfo->udev; | |
456 | struct urb *urb = usb_alloc_urb(0, gfp); | |
b1d67693 GH |
457 | struct scsi_data_buffer *sdb = (dir == DMA_FROM_DEVICE) |
458 | ? scsi_in(cmnd) : scsi_out(cmnd); | |
115bb1ff MW |
459 | |
460 | if (!urb) | |
461 | goto out; | |
b1d67693 GH |
462 | usb_fill_bulk_urb(urb, udev, pipe, NULL, sdb->length, |
463 | uas_data_cmplt, cmnd); | |
c6d4579d | 464 | urb->stream_id = stream_id; |
115bb1ff MW |
465 | urb->num_sgs = udev->bus->sg_tablesize ? sdb->table.nents : 0; |
466 | urb->sg = sdb->table.sgl; | |
467 | out: | |
468 | return urb; | |
469 | } | |
470 | ||
471 | static struct urb *uas_alloc_sense_urb(struct uas_dev_info *devinfo, gfp_t gfp, | |
e9bd7e1a | 472 | struct Scsi_Host *shost, u16 stream_id) |
115bb1ff MW |
473 | { |
474 | struct usb_device *udev = devinfo->udev; | |
475 | struct urb *urb = usb_alloc_urb(0, gfp); | |
476 | struct sense_iu *iu; | |
477 | ||
478 | if (!urb) | |
479 | goto out; | |
480 | ||
ac563cfd | 481 | iu = kzalloc(sizeof(*iu), gfp); |
115bb1ff MW |
482 | if (!iu) |
483 | goto free; | |
484 | ||
485 | usb_fill_bulk_urb(urb, udev, devinfo->status_pipe, iu, sizeof(*iu), | |
e9bd7e1a | 486 | uas_stat_cmplt, shost); |
115bb1ff MW |
487 | urb->stream_id = stream_id; |
488 | urb->transfer_flags |= URB_FREE_BUFFER; | |
489 | out: | |
490 | return urb; | |
491 | free: | |
492 | usb_free_urb(urb); | |
493 | return NULL; | |
494 | } | |
495 | ||
496 | static struct urb *uas_alloc_cmd_urb(struct uas_dev_info *devinfo, gfp_t gfp, | |
a887cd36 | 497 | struct scsi_cmnd *cmnd) |
115bb1ff MW |
498 | { |
499 | struct usb_device *udev = devinfo->udev; | |
500 | struct scsi_device *sdev = cmnd->device; | |
501 | struct urb *urb = usb_alloc_urb(0, gfp); | |
502 | struct command_iu *iu; | |
503 | int len; | |
504 | ||
505 | if (!urb) | |
506 | goto out; | |
507 | ||
508 | len = cmnd->cmd_len - 16; | |
509 | if (len < 0) | |
510 | len = 0; | |
511 | len = ALIGN(len, 4); | |
ac563cfd | 512 | iu = kzalloc(sizeof(*iu) + len, gfp); |
115bb1ff MW |
513 | if (!iu) |
514 | goto free; | |
515 | ||
516 | iu->iu_id = IU_ID_COMMAND; | |
e0620001 | 517 | iu->tag = cpu_to_be16(uas_get_tag(cmnd)); |
02e031cb | 518 | iu->prio_attr = UAS_SIMPLE_TAG; |
115bb1ff MW |
519 | iu->len = len; |
520 | int_to_scsilun(sdev->lun, &iu->lun); | |
521 | memcpy(iu->cdb, cmnd->cmnd, cmnd->cmd_len); | |
522 | ||
523 | usb_fill_bulk_urb(urb, udev, devinfo->cmd_pipe, iu, sizeof(*iu) + len, | |
b6823c51 | 524 | uas_cmd_cmplt, NULL); |
115bb1ff MW |
525 | urb->transfer_flags |= URB_FREE_BUFFER; |
526 | out: | |
527 | return urb; | |
528 | free: | |
529 | usb_free_urb(urb); | |
530 | return NULL; | |
531 | } | |
532 | ||
533 | /* | |
534 | * Why should I request the Status IU before sending the Command IU? Spec | |
535 | * says to, but also says the device may receive them in any order. Seems | |
536 | * daft to me. | |
537 | */ | |
538 | ||
876285cc | 539 | static struct urb *uas_submit_sense_urb(struct scsi_cmnd *cmnd, |
70cf0fba | 540 | gfp_t gfp, unsigned int stream) |
115bb1ff | 541 | { |
876285cc | 542 | struct Scsi_Host *shost = cmnd->device->host; |
21fc05b6 | 543 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
e9bd7e1a | 544 | struct urb *urb; |
876285cc | 545 | int err; |
115bb1ff | 546 | |
e9bd7e1a GH |
547 | urb = uas_alloc_sense_urb(devinfo, gfp, shost, stream); |
548 | if (!urb) | |
70cf0fba | 549 | return NULL; |
d5f808d3 | 550 | usb_anchor_urb(urb, &devinfo->sense_urbs); |
876285cc HG |
551 | err = usb_submit_urb(urb, gfp); |
552 | if (err) { | |
d5f808d3 | 553 | usb_unanchor_urb(urb); |
876285cc | 554 | uas_log_cmd_state(cmnd, __func__); |
e9bd7e1a | 555 | shost_printk(KERN_INFO, shost, |
876285cc HG |
556 | "sense urb submission error %d stream %d\n", |
557 | err, stream); | |
e9bd7e1a | 558 | usb_free_urb(urb); |
70cf0fba | 559 | return NULL; |
115bb1ff | 560 | } |
70cf0fba | 561 | return urb; |
e9bd7e1a GH |
562 | } |
563 | ||
564 | static int uas_submit_urbs(struct scsi_cmnd *cmnd, | |
565 | struct uas_dev_info *devinfo, gfp_t gfp) | |
566 | { | |
567 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
70cf0fba | 568 | struct urb *urb; |
876285cc | 569 | int err; |
115bb1ff | 570 | |
ab945eff | 571 | lockdep_assert_held(&devinfo->lock); |
92a3f767 | 572 | if (cmdinfo->state & SUBMIT_STATUS_URB) { |
876285cc | 573 | urb = uas_submit_sense_urb(cmnd, gfp, cmdinfo->stream); |
70cf0fba HG |
574 | if (!urb) |
575 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
92a3f767 | 576 | cmdinfo->state &= ~SUBMIT_STATUS_URB; |
115bb1ff MW |
577 | } |
578 | ||
579 | if (cmdinfo->state & ALLOC_DATA_IN_URB) { | |
580 | cmdinfo->data_in_urb = uas_alloc_data_urb(devinfo, gfp, | |
c621a81e | 581 | devinfo->data_in_pipe, cmdinfo->stream, |
b1d67693 | 582 | cmnd, DMA_FROM_DEVICE); |
115bb1ff MW |
583 | if (!cmdinfo->data_in_urb) |
584 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
585 | cmdinfo->state &= ~ALLOC_DATA_IN_URB; | |
586 | } | |
587 | ||
588 | if (cmdinfo->state & SUBMIT_DATA_IN_URB) { | |
d5f808d3 | 589 | usb_anchor_urb(cmdinfo->data_in_urb, &devinfo->data_urbs); |
876285cc HG |
590 | err = usb_submit_urb(cmdinfo->data_in_urb, gfp); |
591 | if (err) { | |
d5f808d3 | 592 | usb_unanchor_urb(cmdinfo->data_in_urb); |
876285cc | 593 | uas_log_cmd_state(cmnd, __func__); |
115bb1ff | 594 | scmd_printk(KERN_INFO, cmnd, |
876285cc HG |
595 | "data in urb submission error %d stream %d\n", |
596 | err, cmdinfo->data_in_urb->stream_id); | |
115bb1ff MW |
597 | return SCSI_MLQUEUE_DEVICE_BUSY; |
598 | } | |
599 | cmdinfo->state &= ~SUBMIT_DATA_IN_URB; | |
b1d67693 | 600 | cmdinfo->state |= DATA_IN_URB_INFLIGHT; |
115bb1ff MW |
601 | } |
602 | ||
603 | if (cmdinfo->state & ALLOC_DATA_OUT_URB) { | |
604 | cmdinfo->data_out_urb = uas_alloc_data_urb(devinfo, gfp, | |
c621a81e | 605 | devinfo->data_out_pipe, cmdinfo->stream, |
b1d67693 | 606 | cmnd, DMA_TO_DEVICE); |
115bb1ff MW |
607 | if (!cmdinfo->data_out_urb) |
608 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
609 | cmdinfo->state &= ~ALLOC_DATA_OUT_URB; | |
610 | } | |
611 | ||
612 | if (cmdinfo->state & SUBMIT_DATA_OUT_URB) { | |
d5f808d3 | 613 | usb_anchor_urb(cmdinfo->data_out_urb, &devinfo->data_urbs); |
876285cc HG |
614 | err = usb_submit_urb(cmdinfo->data_out_urb, gfp); |
615 | if (err) { | |
d5f808d3 | 616 | usb_unanchor_urb(cmdinfo->data_out_urb); |
876285cc | 617 | uas_log_cmd_state(cmnd, __func__); |
115bb1ff | 618 | scmd_printk(KERN_INFO, cmnd, |
876285cc HG |
619 | "data out urb submission error %d stream %d\n", |
620 | err, cmdinfo->data_out_urb->stream_id); | |
115bb1ff MW |
621 | return SCSI_MLQUEUE_DEVICE_BUSY; |
622 | } | |
623 | cmdinfo->state &= ~SUBMIT_DATA_OUT_URB; | |
b1d67693 | 624 | cmdinfo->state |= DATA_OUT_URB_INFLIGHT; |
115bb1ff MW |
625 | } |
626 | ||
627 | if (cmdinfo->state & ALLOC_CMD_URB) { | |
a887cd36 | 628 | cmdinfo->cmd_urb = uas_alloc_cmd_urb(devinfo, gfp, cmnd); |
115bb1ff MW |
629 | if (!cmdinfo->cmd_urb) |
630 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
631 | cmdinfo->state &= ~ALLOC_CMD_URB; | |
632 | } | |
633 | ||
634 | if (cmdinfo->state & SUBMIT_CMD_URB) { | |
d5f808d3 | 635 | usb_anchor_urb(cmdinfo->cmd_urb, &devinfo->cmd_urbs); |
876285cc HG |
636 | err = usb_submit_urb(cmdinfo->cmd_urb, gfp); |
637 | if (err) { | |
d5f808d3 | 638 | usb_unanchor_urb(cmdinfo->cmd_urb); |
876285cc | 639 | uas_log_cmd_state(cmnd, __func__); |
115bb1ff | 640 | scmd_printk(KERN_INFO, cmnd, |
876285cc | 641 | "cmd urb submission error %d\n", err); |
115bb1ff MW |
642 | return SCSI_MLQUEUE_DEVICE_BUSY; |
643 | } | |
a0e39e34 | 644 | cmdinfo->cmd_urb = NULL; |
115bb1ff | 645 | cmdinfo->state &= ~SUBMIT_CMD_URB; |
b1d67693 | 646 | cmdinfo->state |= COMMAND_INFLIGHT; |
115bb1ff MW |
647 | } |
648 | ||
649 | return 0; | |
650 | } | |
651 | ||
f281233d | 652 | static int uas_queuecommand_lck(struct scsi_cmnd *cmnd, |
115bb1ff MW |
653 | void (*done)(struct scsi_cmnd *)) |
654 | { | |
655 | struct scsi_device *sdev = cmnd->device; | |
656 | struct uas_dev_info *devinfo = sdev->hostdata; | |
657 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
e0648520 | 658 | unsigned long flags; |
5e61aede | 659 | unsigned int stream; |
115bb1ff MW |
660 | int err; |
661 | ||
662 | BUILD_BUG_ON(sizeof(struct uas_cmd_info) > sizeof(struct scsi_pointer)); | |
663 | ||
f9dc024a HG |
664 | /* Re-check scsi_block_requests now that we've the host-lock */ |
665 | if (cmnd->device->host->host_self_blocked) | |
666 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
667 | ||
59307852 HG |
668 | if ((devinfo->flags & US_FL_NO_ATA_1X) && |
669 | (cmnd->cmnd[0] == ATA_12 || cmnd->cmnd[0] == ATA_16)) { | |
670 | memcpy(cmnd->sense_buffer, usb_stor_sense_invalidCDB, | |
671 | sizeof(usb_stor_sense_invalidCDB)); | |
672 | cmnd->result = SAM_STAT_CHECK_CONDITION; | |
673 | cmnd->scsi_done(cmnd); | |
674 | return 0; | |
675 | } | |
676 | ||
c6f63207 HG |
677 | spin_lock_irqsave(&devinfo->lock, flags); |
678 | ||
f8be6bfc GH |
679 | if (devinfo->resetting) { |
680 | cmnd->result = DID_ERROR << 16; | |
681 | cmnd->scsi_done(cmnd); | |
c6f63207 | 682 | spin_unlock_irqrestore(&devinfo->lock, flags); |
f8be6bfc GH |
683 | return 0; |
684 | } | |
685 | ||
5e61aede HG |
686 | stream = uas_get_tag(cmnd); |
687 | if (devinfo->cmnd[stream - 1]) { | |
e0648520 | 688 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff | 689 | return SCSI_MLQUEUE_DEVICE_BUSY; |
e0648520 | 690 | } |
115bb1ff | 691 | |
115bb1ff MW |
692 | cmnd->scsi_done = done; |
693 | ||
5e61aede HG |
694 | memset(cmdinfo, 0, sizeof(*cmdinfo)); |
695 | cmdinfo->stream = stream; | |
e0620001 | 696 | cmdinfo->state = SUBMIT_STATUS_URB | ALLOC_CMD_URB | SUBMIT_CMD_URB; |
115bb1ff MW |
697 | |
698 | switch (cmnd->sc_data_direction) { | |
699 | case DMA_FROM_DEVICE: | |
700 | cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB; | |
701 | break; | |
702 | case DMA_BIDIRECTIONAL: | |
703 | cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB; | |
704 | case DMA_TO_DEVICE: | |
705 | cmdinfo->state |= ALLOC_DATA_OUT_URB | SUBMIT_DATA_OUT_URB; | |
706 | case DMA_NONE: | |
707 | break; | |
708 | } | |
709 | ||
710 | if (!devinfo->use_streams) { | |
db32de11 | 711 | cmdinfo->state &= ~(SUBMIT_DATA_IN_URB | SUBMIT_DATA_OUT_URB); |
115bb1ff MW |
712 | cmdinfo->stream = 0; |
713 | } | |
714 | ||
715 | err = uas_submit_urbs(cmnd, devinfo, GFP_ATOMIC); | |
716 | if (err) { | |
717 | /* If we did nothing, give up now */ | |
92a3f767 | 718 | if (cmdinfo->state & SUBMIT_STATUS_URB) { |
e0648520 | 719 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
720 | return SCSI_MLQUEUE_DEVICE_BUSY; |
721 | } | |
1bf8198e | 722 | uas_add_work(cmdinfo); |
115bb1ff MW |
723 | } |
724 | ||
5e61aede | 725 | devinfo->cmnd[stream - 1] = cmnd; |
e0648520 | 726 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
727 | return 0; |
728 | } | |
729 | ||
f281233d JG |
730 | static DEF_SCSI_QCMD(uas_queuecommand) |
731 | ||
616f0e6c HG |
732 | /* |
733 | * For now we do not support actually sending an abort to the device, so | |
734 | * this eh always fails. Still we must define it to make sure that we've | |
735 | * dropped all references to the cmnd in question once this function exits. | |
736 | */ | |
737 | static int uas_eh_abort_handler(struct scsi_cmnd *cmnd) | |
738 | { | |
739 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
740 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; | |
741 | struct urb *data_in_urb = NULL; | |
742 | struct urb *data_out_urb = NULL; | |
743 | unsigned long flags; | |
744 | ||
745 | spin_lock_irqsave(&devinfo->lock, flags); | |
746 | ||
747 | uas_log_cmd_state(cmnd, __func__); | |
748 | ||
749 | /* Ensure that try_complete does not call scsi_done */ | |
750 | cmdinfo->state |= COMMAND_ABORTED; | |
751 | ||
752 | /* Drop all refs to this cmnd, kill data urbs to break their ref */ | |
753 | devinfo->cmnd[uas_get_tag(cmnd) - 1] = NULL; | |
754 | if (cmdinfo->state & DATA_IN_URB_INFLIGHT) | |
755 | data_in_urb = usb_get_urb(cmdinfo->data_in_urb); | |
756 | if (cmdinfo->state & DATA_OUT_URB_INFLIGHT) | |
757 | data_out_urb = usb_get_urb(cmdinfo->data_out_urb); | |
758 | ||
4c5481ef HG |
759 | uas_free_unsubmitted_urbs(cmnd); |
760 | ||
616f0e6c HG |
761 | spin_unlock_irqrestore(&devinfo->lock, flags); |
762 | ||
763 | if (data_in_urb) { | |
764 | usb_kill_urb(data_in_urb); | |
765 | usb_put_urb(data_in_urb); | |
766 | } | |
767 | if (data_out_urb) { | |
768 | usb_kill_urb(data_out_urb); | |
769 | usb_put_urb(data_out_urb); | |
770 | } | |
771 | ||
772 | return FAILED; | |
773 | } | |
774 | ||
115bb1ff MW |
775 | static int uas_eh_bus_reset_handler(struct scsi_cmnd *cmnd) |
776 | { | |
777 | struct scsi_device *sdev = cmnd->device; | |
778 | struct uas_dev_info *devinfo = sdev->hostdata; | |
779 | struct usb_device *udev = devinfo->udev; | |
b7b5d11f | 780 | unsigned long flags; |
023b515e | 781 | int err; |
115bb1ff | 782 | |
be326f4c HG |
783 | err = usb_lock_device_for_reset(udev, devinfo->intf); |
784 | if (err) { | |
785 | shost_printk(KERN_ERR, sdev->host, | |
786 | "%s FAILED to get lock err %d\n", __func__, err); | |
787 | return FAILED; | |
788 | } | |
789 | ||
326349f8 | 790 | shost_printk(KERN_INFO, sdev->host, "%s start\n", __func__); |
b7b5d11f HG |
791 | |
792 | spin_lock_irqsave(&devinfo->lock, flags); | |
023b515e | 793 | devinfo->resetting = 1; |
b7b5d11f HG |
794 | spin_unlock_irqrestore(&devinfo->lock, flags); |
795 | ||
a0e39e34 | 796 | usb_kill_anchored_urbs(&devinfo->cmd_urbs); |
023b515e GH |
797 | usb_kill_anchored_urbs(&devinfo->sense_urbs); |
798 | usb_kill_anchored_urbs(&devinfo->data_urbs); | |
1589349f HG |
799 | uas_zap_pending(devinfo, DID_RESET); |
800 | ||
023b515e | 801 | err = usb_reset_device(udev); |
b7b5d11f HG |
802 | |
803 | spin_lock_irqsave(&devinfo->lock, flags); | |
023b515e | 804 | devinfo->resetting = 0; |
b7b5d11f | 805 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff | 806 | |
be326f4c HG |
807 | usb_unlock_device(udev); |
808 | ||
023b515e GH |
809 | if (err) { |
810 | shost_printk(KERN_INFO, sdev->host, "%s FAILED\n", __func__); | |
811 | return FAILED; | |
812 | } | |
115bb1ff | 813 | |
023b515e GH |
814 | shost_printk(KERN_INFO, sdev->host, "%s success\n", __func__); |
815 | return SUCCESS; | |
115bb1ff MW |
816 | } |
817 | ||
818 | static int uas_slave_alloc(struct scsi_device *sdev) | |
819 | { | |
21fc05b6 | 820 | sdev->hostdata = (void *)sdev->host->hostdata; |
37599f96 HG |
821 | |
822 | /* USB has unusual DMA-alignment requirements: Although the | |
823 | * starting address of each scatter-gather element doesn't matter, | |
824 | * the length of each element except the last must be divisible | |
825 | * by the Bulk maxpacket value. There's currently no way to | |
826 | * express this by block-layer constraints, so we'll cop out | |
827 | * and simply require addresses to be aligned at 512-byte | |
828 | * boundaries. This is okay since most block I/O involves | |
829 | * hardware sectors that are multiples of 512 bytes in length, | |
830 | * and since host controllers up through USB 2.0 have maxpacket | |
831 | * values no larger than 512. | |
832 | * | |
833 | * But it doesn't suffice for Wireless USB, where Bulk maxpacket | |
834 | * values can be as large as 2048. To make that work properly | |
835 | * will require changes to the block layer. | |
836 | */ | |
837 | blk_queue_update_dma_alignment(sdev->request_queue, (512 - 1)); | |
838 | ||
115bb1ff MW |
839 | return 0; |
840 | } | |
841 | ||
842 | static int uas_slave_configure(struct scsi_device *sdev) | |
843 | { | |
844 | struct uas_dev_info *devinfo = sdev->hostdata; | |
734016b0 HG |
845 | |
846 | if (devinfo->flags & US_FL_NO_REPORT_OPCODES) | |
847 | sdev->no_report_opcodes = 1; | |
848 | ||
115bb1ff | 849 | scsi_set_tag_type(sdev, MSG_ORDERED_TAG); |
d3f7c156 | 850 | scsi_activate_tcq(sdev, devinfo->qdepth - 2); |
115bb1ff MW |
851 | return 0; |
852 | } | |
853 | ||
854 | static struct scsi_host_template uas_host_template = { | |
855 | .module = THIS_MODULE, | |
856 | .name = "uas", | |
857 | .queuecommand = uas_queuecommand, | |
858 | .slave_alloc = uas_slave_alloc, | |
859 | .slave_configure = uas_slave_configure, | |
616f0e6c | 860 | .eh_abort_handler = uas_eh_abort_handler, |
115bb1ff MW |
861 | .eh_bus_reset_handler = uas_eh_bus_reset_handler, |
862 | .can_queue = 65536, /* Is there a limit on the _host_ ? */ | |
863 | .this_id = -1, | |
864 | .sg_tablesize = SG_NONE, | |
865 | .cmd_per_lun = 1, /* until we override it */ | |
866 | .skip_settle_delay = 1, | |
867 | .ordered_tag = 1, | |
868 | }; | |
869 | ||
79b4c061 HG |
870 | #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \ |
871 | vendorName, productName, useProtocol, useTransport, \ | |
872 | initFunction, flags) \ | |
873 | { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \ | |
874 | .driver_info = (flags) } | |
875 | ||
115bb1ff | 876 | static struct usb_device_id uas_usb_ids[] = { |
79b4c061 | 877 | # include "unusual_uas.h" |
115bb1ff MW |
878 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_BULK) }, |
879 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_UAS) }, | |
880 | /* 0xaa is a prototype device I happen to have access to */ | |
881 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, 0xaa) }, | |
882 | { } | |
883 | }; | |
884 | MODULE_DEVICE_TABLE(usb, uas_usb_ids); | |
885 | ||
79b4c061 HG |
886 | #undef UNUSUAL_DEV |
887 | ||
e1be067b HG |
888 | static int uas_switch_interface(struct usb_device *udev, |
889 | struct usb_interface *intf) | |
890 | { | |
891 | int alt; | |
892 | ||
893 | alt = uas_find_uas_alt_setting(intf); | |
894 | if (alt < 0) | |
895 | return alt; | |
896 | ||
897 | return usb_set_interface(udev, | |
898 | intf->altsetting[0].desc.bInterfaceNumber, alt); | |
899 | } | |
900 | ||
58d51444 | 901 | static int uas_configure_endpoints(struct uas_dev_info *devinfo) |
34f11e59 HG |
902 | { |
903 | struct usb_host_endpoint *eps[4] = { }; | |
904 | struct usb_device *udev = devinfo->udev; | |
905 | int r; | |
906 | ||
907 | devinfo->uas_sense_old = 0; | |
34f11e59 HG |
908 | |
909 | r = uas_find_endpoints(devinfo->intf->cur_altsetting, eps); | |
74d71aec HG |
910 | if (r) |
911 | return r; | |
912 | ||
913 | devinfo->cmd_pipe = usb_sndbulkpipe(udev, | |
914 | usb_endpoint_num(&eps[0]->desc)); | |
915 | devinfo->status_pipe = usb_rcvbulkpipe(udev, | |
916 | usb_endpoint_num(&eps[1]->desc)); | |
917 | devinfo->data_in_pipe = usb_rcvbulkpipe(udev, | |
918 | usb_endpoint_num(&eps[2]->desc)); | |
919 | devinfo->data_out_pipe = usb_sndbulkpipe(udev, | |
920 | usb_endpoint_num(&eps[3]->desc)); | |
115bb1ff | 921 | |
e5e55819 | 922 | if (udev->speed < USB_SPEED_SUPER) { |
e2875c33 | 923 | devinfo->qdepth = 32; |
115bb1ff MW |
924 | devinfo->use_streams = 0; |
925 | } else { | |
58d51444 | 926 | devinfo->qdepth = usb_alloc_streams(devinfo->intf, eps + 1, |
5e61aede | 927 | 3, MAX_CMNDS, GFP_NOIO); |
58d51444 HG |
928 | if (devinfo->qdepth < 0) |
929 | return devinfo->qdepth; | |
115bb1ff MW |
930 | devinfo->use_streams = 1; |
931 | } | |
58d51444 HG |
932 | |
933 | return 0; | |
115bb1ff MW |
934 | } |
935 | ||
dae51546 SAS |
936 | static void uas_free_streams(struct uas_dev_info *devinfo) |
937 | { | |
938 | struct usb_device *udev = devinfo->udev; | |
939 | struct usb_host_endpoint *eps[3]; | |
940 | ||
941 | eps[0] = usb_pipe_endpoint(udev, devinfo->status_pipe); | |
942 | eps[1] = usb_pipe_endpoint(udev, devinfo->data_in_pipe); | |
943 | eps[2] = usb_pipe_endpoint(udev, devinfo->data_out_pipe); | |
94d72f00 | 944 | usb_free_streams(devinfo->intf, eps, 3, GFP_NOIO); |
dae51546 SAS |
945 | } |
946 | ||
115bb1ff MW |
947 | static int uas_probe(struct usb_interface *intf, const struct usb_device_id *id) |
948 | { | |
6ce8213b HG |
949 | int result = -ENOMEM; |
950 | struct Scsi_Host *shost = NULL; | |
115bb1ff MW |
951 | struct uas_dev_info *devinfo; |
952 | struct usb_device *udev = interface_to_usbdev(intf); | |
953 | ||
79b4c061 HG |
954 | if (!uas_use_uas_driver(intf, id)) |
955 | return -ENODEV; | |
956 | ||
89dc2905 MW |
957 | if (uas_switch_interface(udev, intf)) |
958 | return -ENODEV; | |
115bb1ff | 959 | |
21fc05b6 HG |
960 | shost = scsi_host_alloc(&uas_host_template, |
961 | sizeof(struct uas_dev_info)); | |
115bb1ff | 962 | if (!shost) |
6ce8213b | 963 | goto set_alt0; |
115bb1ff MW |
964 | |
965 | shost->max_cmd_len = 16 + 252; | |
966 | shost->max_id = 1; | |
bde027b4 GH |
967 | shost->max_lun = 256; |
968 | shost->max_channel = 0; | |
115bb1ff MW |
969 | shost->sg_tablesize = udev->bus->sg_tablesize; |
970 | ||
21fc05b6 | 971 | devinfo = (struct uas_dev_info *)shost->hostdata; |
115bb1ff MW |
972 | devinfo->intf = intf; |
973 | devinfo->udev = udev; | |
023b515e | 974 | devinfo->resetting = 0; |
da65c2bb | 975 | devinfo->shutdown = 0; |
59307852 HG |
976 | devinfo->flags = id->driver_info; |
977 | usb_stor_adjust_quirks(udev, &devinfo->flags); | |
a0e39e34 | 978 | init_usb_anchor(&devinfo->cmd_urbs); |
bdd000fb GH |
979 | init_usb_anchor(&devinfo->sense_urbs); |
980 | init_usb_anchor(&devinfo->data_urbs); | |
e0648520 | 981 | spin_lock_init(&devinfo->lock); |
1bf8198e | 982 | INIT_WORK(&devinfo->work, uas_do_work); |
58d51444 HG |
983 | |
984 | result = uas_configure_endpoints(devinfo); | |
985 | if (result) | |
986 | goto set_alt0; | |
115bb1ff | 987 | |
d3f7c156 | 988 | result = scsi_init_shared_tag_map(shost, devinfo->qdepth - 2); |
115bb1ff | 989 | if (result) |
6ce8213b | 990 | goto free_streams; |
dae51546 | 991 | |
c637f1fa | 992 | usb_set_intfdata(intf, shost); |
dae51546 SAS |
993 | result = scsi_add_host(shost, &intf->dev); |
994 | if (result) | |
6ce8213b | 995 | goto free_streams; |
dae51546 | 996 | |
115bb1ff | 997 | scsi_scan_host(shost); |
115bb1ff | 998 | return result; |
dae51546 | 999 | |
6ce8213b | 1000 | free_streams: |
dae51546 | 1001 | uas_free_streams(devinfo); |
c637f1fa | 1002 | usb_set_intfdata(intf, NULL); |
6ce8213b HG |
1003 | set_alt0: |
1004 | usb_set_interface(udev, intf->altsetting[0].desc.bInterfaceNumber, 0); | |
115bb1ff MW |
1005 | if (shost) |
1006 | scsi_host_put(shost); | |
1007 | return result; | |
1008 | } | |
1009 | ||
f9dc024a HG |
1010 | static int uas_cmnd_list_empty(struct uas_dev_info *devinfo) |
1011 | { | |
1012 | unsigned long flags; | |
1013 | int i, r = 1; | |
1014 | ||
1015 | spin_lock_irqsave(&devinfo->lock, flags); | |
1016 | ||
1017 | for (i = 0; i < devinfo->qdepth; i++) { | |
1018 | if (devinfo->cmnd[i]) { | |
1019 | r = 0; /* Not empty */ | |
1020 | break; | |
1021 | } | |
1022 | } | |
1023 | ||
1024 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
1025 | ||
1026 | return r; | |
1027 | } | |
1028 | ||
1029 | /* | |
1030 | * Wait for any pending cmnds to complete, on usb-2 sense_urbs may temporarily | |
1031 | * get empty while there still is more work to do due to sense-urbs completing | |
1032 | * with a READ/WRITE_READY iu code, so keep waiting until the list gets empty. | |
1033 | */ | |
1034 | static int uas_wait_for_pending_cmnds(struct uas_dev_info *devinfo) | |
1035 | { | |
1036 | unsigned long start_time; | |
1037 | int r; | |
1038 | ||
1039 | start_time = jiffies; | |
1040 | do { | |
1041 | flush_work(&devinfo->work); | |
1042 | ||
1043 | r = usb_wait_anchor_empty_timeout(&devinfo->sense_urbs, 5000); | |
1044 | if (r == 0) | |
1045 | return -ETIME; | |
1046 | ||
1047 | r = usb_wait_anchor_empty_timeout(&devinfo->data_urbs, 500); | |
1048 | if (r == 0) | |
1049 | return -ETIME; | |
1050 | ||
1051 | if (time_after(jiffies, start_time + 5 * HZ)) | |
1052 | return -ETIME; | |
1053 | } while (!uas_cmnd_list_empty(devinfo)); | |
1054 | ||
1055 | return 0; | |
1056 | } | |
1057 | ||
115bb1ff MW |
1058 | static int uas_pre_reset(struct usb_interface *intf) |
1059 | { | |
4de7a373 | 1060 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
21fc05b6 | 1061 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
4de7a373 HG |
1062 | unsigned long flags; |
1063 | ||
da65c2bb HG |
1064 | if (devinfo->shutdown) |
1065 | return 0; | |
1066 | ||
4de7a373 HG |
1067 | /* Block new requests */ |
1068 | spin_lock_irqsave(shost->host_lock, flags); | |
1069 | scsi_block_requests(shost); | |
1070 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1071 | ||
f9dc024a | 1072 | if (uas_wait_for_pending_cmnds(devinfo) != 0) { |
4de7a373 | 1073 | shost_printk(KERN_ERR, shost, "%s: timed out\n", __func__); |
f9dc024a | 1074 | scsi_unblock_requests(shost); |
4de7a373 HG |
1075 | return 1; |
1076 | } | |
1077 | ||
1078 | uas_free_streams(devinfo); | |
1079 | ||
115bb1ff MW |
1080 | return 0; |
1081 | } | |
1082 | ||
1083 | static int uas_post_reset(struct usb_interface *intf) | |
1084 | { | |
4de7a373 | 1085 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
21fc05b6 | 1086 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
4de7a373 HG |
1087 | unsigned long flags; |
1088 | ||
da65c2bb HG |
1089 | if (devinfo->shutdown) |
1090 | return 0; | |
1091 | ||
58d51444 HG |
1092 | if (uas_configure_endpoints(devinfo) != 0) { |
1093 | shost_printk(KERN_ERR, shost, | |
1094 | "%s: alloc streams error after reset", __func__); | |
1095 | return 1; | |
1096 | } | |
4de7a373 HG |
1097 | |
1098 | spin_lock_irqsave(shost->host_lock, flags); | |
1099 | scsi_report_bus_reset(shost, 0); | |
1100 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1101 | ||
1102 | scsi_unblock_requests(shost); | |
1103 | ||
115bb1ff MW |
1104 | return 0; |
1105 | } | |
1106 | ||
0df1f663 HG |
1107 | static int uas_suspend(struct usb_interface *intf, pm_message_t message) |
1108 | { | |
1109 | struct Scsi_Host *shost = usb_get_intfdata(intf); | |
21fc05b6 | 1110 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
0df1f663 | 1111 | |
f9dc024a | 1112 | if (uas_wait_for_pending_cmnds(devinfo) != 0) { |
0df1f663 HG |
1113 | shost_printk(KERN_ERR, shost, "%s: timed out\n", __func__); |
1114 | return -ETIME; | |
1115 | } | |
1116 | ||
1117 | return 0; | |
1118 | } | |
1119 | ||
1120 | static int uas_resume(struct usb_interface *intf) | |
1121 | { | |
1122 | return 0; | |
1123 | } | |
1124 | ||
1125 | static int uas_reset_resume(struct usb_interface *intf) | |
1126 | { | |
1127 | struct Scsi_Host *shost = usb_get_intfdata(intf); | |
21fc05b6 | 1128 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
0df1f663 HG |
1129 | unsigned long flags; |
1130 | ||
1131 | if (uas_configure_endpoints(devinfo) != 0) { | |
1132 | shost_printk(KERN_ERR, shost, | |
1133 | "%s: alloc streams error after reset", __func__); | |
1134 | return -EIO; | |
1135 | } | |
1136 | ||
1137 | spin_lock_irqsave(shost->host_lock, flags); | |
1138 | scsi_report_bus_reset(shost, 0); | |
1139 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1140 | ||
1141 | return 0; | |
1142 | } | |
1143 | ||
115bb1ff MW |
1144 | static void uas_disconnect(struct usb_interface *intf) |
1145 | { | |
115bb1ff | 1146 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
21fc05b6 | 1147 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
b7b5d11f | 1148 | unsigned long flags; |
115bb1ff | 1149 | |
b7b5d11f | 1150 | spin_lock_irqsave(&devinfo->lock, flags); |
4c456971 | 1151 | devinfo->resetting = 1; |
b7b5d11f HG |
1152 | spin_unlock_irqrestore(&devinfo->lock, flags); |
1153 | ||
1bf8198e | 1154 | cancel_work_sync(&devinfo->work); |
a0e39e34 | 1155 | usb_kill_anchored_urbs(&devinfo->cmd_urbs); |
bdd000fb GH |
1156 | usb_kill_anchored_urbs(&devinfo->sense_urbs); |
1157 | usb_kill_anchored_urbs(&devinfo->data_urbs); | |
1589349f HG |
1158 | uas_zap_pending(devinfo, DID_NO_CONNECT); |
1159 | ||
4c456971 | 1160 | scsi_remove_host(shost); |
dae51546 | 1161 | uas_free_streams(devinfo); |
21fc05b6 | 1162 | scsi_host_put(shost); |
115bb1ff MW |
1163 | } |
1164 | ||
da65c2bb HG |
1165 | /* |
1166 | * Put the device back in usb-storage mode on shutdown, as some BIOS-es | |
1167 | * hang on reboot when the device is still in uas mode. Note the reset is | |
1168 | * necessary as some devices won't revert to usb-storage mode without it. | |
1169 | */ | |
1170 | static void uas_shutdown(struct device *dev) | |
1171 | { | |
1172 | struct usb_interface *intf = to_usb_interface(dev); | |
1173 | struct usb_device *udev = interface_to_usbdev(intf); | |
1174 | struct Scsi_Host *shost = usb_get_intfdata(intf); | |
21fc05b6 | 1175 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
da65c2bb HG |
1176 | |
1177 | if (system_state != SYSTEM_RESTART) | |
1178 | return; | |
1179 | ||
1180 | devinfo->shutdown = 1; | |
1181 | uas_free_streams(devinfo); | |
1182 | usb_set_interface(udev, intf->altsetting[0].desc.bInterfaceNumber, 0); | |
1183 | usb_reset_device(udev); | |
1184 | } | |
1185 | ||
115bb1ff MW |
1186 | static struct usb_driver uas_driver = { |
1187 | .name = "uas", | |
1188 | .probe = uas_probe, | |
1189 | .disconnect = uas_disconnect, | |
1190 | .pre_reset = uas_pre_reset, | |
1191 | .post_reset = uas_post_reset, | |
0df1f663 HG |
1192 | .suspend = uas_suspend, |
1193 | .resume = uas_resume, | |
1194 | .reset_resume = uas_reset_resume, | |
da65c2bb | 1195 | .drvwrap.driver.shutdown = uas_shutdown, |
115bb1ff MW |
1196 | .id_table = uas_usb_ids, |
1197 | }; | |
1198 | ||
65db4305 | 1199 | module_usb_driver(uas_driver); |
115bb1ff MW |
1200 | |
1201 | MODULE_LICENSE("GPL"); | |
f50a4968 HG |
1202 | MODULE_AUTHOR( |
1203 | "Hans de Goede <hdegoede@redhat.com>, Matthew Wilcox and Sarah Sharp"); |