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), | |
77 | COMMAND_COMPLETED = (1 << 11), | |
ef018cc9 | 78 | COMMAND_ABORTED = (1 << 12), |
60d9f67d | 79 | IS_IN_WORK_LIST = (1 << 13), |
115bb1ff MW |
80 | }; |
81 | ||
82 | /* Overrides scsi_pointer */ | |
83 | struct uas_cmd_info { | |
84 | unsigned int state; | |
85 | unsigned int stream; | |
86 | struct urb *cmd_urb; | |
115bb1ff MW |
87 | struct urb *data_in_urb; |
88 | struct urb *data_out_urb; | |
115bb1ff MW |
89 | }; |
90 | ||
91 | /* I hate forward declarations, but I actually have a loop */ | |
92 | static int uas_submit_urbs(struct scsi_cmnd *cmnd, | |
93 | struct uas_dev_info *devinfo, gfp_t gfp); | |
ea9da1c7 | 94 | static void uas_do_work(struct work_struct *work); |
4c456971 | 95 | static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller); |
d89bd835 | 96 | static void uas_free_streams(struct uas_dev_info *devinfo); |
326349f8 | 97 | static void uas_log_cmd_state(struct scsi_cmnd *cmnd, const char *caller); |
115bb1ff | 98 | |
115bb1ff MW |
99 | static void uas_do_work(struct work_struct *work) |
100 | { | |
1bf8198e GH |
101 | struct uas_dev_info *devinfo = |
102 | container_of(work, struct uas_dev_info, work); | |
115bb1ff | 103 | struct uas_cmd_info *cmdinfo; |
43cd99cb | 104 | struct scsi_cmnd *cmnd; |
e0648520 | 105 | unsigned long flags; |
43cd99cb | 106 | int i, err; |
115bb1ff | 107 | |
1bf8198e | 108 | spin_lock_irqsave(&devinfo->lock, flags); |
b7b5d11f HG |
109 | |
110 | if (devinfo->resetting) | |
111 | goto out; | |
112 | ||
43cd99cb HG |
113 | for (i = 0; i < devinfo->qdepth; i++) { |
114 | if (!devinfo->cmnd[i]) | |
115 | continue; | |
116 | ||
117 | cmnd = devinfo->cmnd[i]; | |
118 | cmdinfo = (void *)&cmnd->SCp; | |
61c09ce5 HG |
119 | |
120 | if (!(cmdinfo->state & IS_IN_WORK_LIST)) | |
121 | continue; | |
122 | ||
e7eda932 | 123 | err = uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_ATOMIC); |
61c09ce5 | 124 | if (!err) |
efefecf3 | 125 | cmdinfo->state &= ~IS_IN_WORK_LIST; |
61c09ce5 | 126 | else |
1bf8198e | 127 | schedule_work(&devinfo->work); |
115bb1ff | 128 | } |
b7b5d11f | 129 | out: |
1bf8198e | 130 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
131 | } |
132 | ||
1bf8198e GH |
133 | static void uas_add_work(struct uas_cmd_info *cmdinfo) |
134 | { | |
135 | struct scsi_pointer *scp = (void *)cmdinfo; | |
136 | struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, SCp); | |
137 | struct uas_dev_info *devinfo = cmnd->device->hostdata; | |
138 | ||
ab945eff | 139 | lockdep_assert_held(&devinfo->lock); |
1bf8198e GH |
140 | cmdinfo->state |= IS_IN_WORK_LIST; |
141 | schedule_work(&devinfo->work); | |
142 | } | |
143 | ||
1589349f | 144 | static void uas_zap_pending(struct uas_dev_info *devinfo, int result) |
326349f8 GH |
145 | { |
146 | struct uas_cmd_info *cmdinfo; | |
43cd99cb | 147 | struct scsi_cmnd *cmnd; |
326349f8 | 148 | unsigned long flags; |
43cd99cb | 149 | int i, err; |
326349f8 GH |
150 | |
151 | spin_lock_irqsave(&devinfo->lock, flags); | |
43cd99cb HG |
152 | for (i = 0; i < devinfo->qdepth; i++) { |
153 | if (!devinfo->cmnd[i]) | |
154 | continue; | |
155 | ||
156 | cmnd = devinfo->cmnd[i]; | |
157 | cmdinfo = (void *)&cmnd->SCp; | |
326349f8 | 158 | uas_log_cmd_state(cmnd, __func__); |
9c15c573 HG |
159 | /* Sense urbs were killed, clear COMMAND_INFLIGHT manually */ |
160 | cmdinfo->state &= ~COMMAND_INFLIGHT; | |
1589349f | 161 | cmnd->result = result << 16; |
9c15c573 HG |
162 | err = uas_try_complete(cmnd, __func__); |
163 | WARN_ON(err != 0); | |
326349f8 GH |
164 | } |
165 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
166 | } | |
167 | ||
115bb1ff MW |
168 | static void uas_sense(struct urb *urb, struct scsi_cmnd *cmnd) |
169 | { | |
170 | struct sense_iu *sense_iu = urb->transfer_buffer; | |
171 | struct scsi_device *sdev = cmnd->device; | |
172 | ||
173 | if (urb->actual_length > 16) { | |
174 | unsigned len = be16_to_cpup(&sense_iu->len); | |
175 | if (len + 16 != urb->actual_length) { | |
176 | int newlen = min(len + 16, urb->actual_length) - 16; | |
177 | if (newlen < 0) | |
178 | newlen = 0; | |
179 | sdev_printk(KERN_INFO, sdev, "%s: urb length %d " | |
180 | "disagrees with IU sense data length %d, " | |
181 | "using %d bytes of sense data\n", __func__, | |
182 | urb->actual_length, len, newlen); | |
183 | len = newlen; | |
184 | } | |
185 | memcpy(cmnd->sense_buffer, sense_iu->sense, len); | |
186 | } | |
187 | ||
188 | cmnd->result = sense_iu->status; | |
115bb1ff MW |
189 | } |
190 | ||
191 | static void uas_sense_old(struct urb *urb, struct scsi_cmnd *cmnd) | |
192 | { | |
193 | struct sense_iu_old *sense_iu = urb->transfer_buffer; | |
194 | struct scsi_device *sdev = cmnd->device; | |
195 | ||
196 | if (urb->actual_length > 8) { | |
197 | unsigned len = be16_to_cpup(&sense_iu->len) - 2; | |
198 | if (len + 8 != urb->actual_length) { | |
199 | int newlen = min(len + 8, urb->actual_length) - 8; | |
200 | if (newlen < 0) | |
201 | newlen = 0; | |
202 | sdev_printk(KERN_INFO, sdev, "%s: urb length %d " | |
203 | "disagrees with IU sense data length %d, " | |
204 | "using %d bytes of sense data\n", __func__, | |
205 | urb->actual_length, len, newlen); | |
206 | len = newlen; | |
207 | } | |
208 | memcpy(cmnd->sense_buffer, sense_iu->sense, len); | |
209 | } | |
210 | ||
211 | cmnd->result = sense_iu->status; | |
b1d67693 GH |
212 | } |
213 | ||
e0620001 HG |
214 | /* |
215 | * scsi-tags go from 0 - (nr_tags - 1), uas tags need to match stream-ids, | |
216 | * which go from 1 - nr_streams. And we use 1 for untagged commands. | |
217 | */ | |
218 | static int uas_get_tag(struct scsi_cmnd *cmnd) | |
219 | { | |
220 | int tag; | |
221 | ||
222 | if (blk_rq_tagged(cmnd->request)) | |
223 | tag = cmnd->request->tag + 2; | |
224 | else | |
225 | tag = 1; | |
226 | ||
227 | return tag; | |
228 | } | |
229 | ||
b1d67693 GH |
230 | static void uas_log_cmd_state(struct scsi_cmnd *cmnd, const char *caller) |
231 | { | |
232 | struct uas_cmd_info *ci = (void *)&cmnd->SCp; | |
233 | ||
60d9f67d HG |
234 | scmd_printk(KERN_INFO, cmnd, |
235 | "%s %p tag %d, inflight:%s%s%s%s%s%s%s%s%s%s%s%s%s\n", | |
e0620001 | 236 | caller, cmnd, uas_get_tag(cmnd), |
b1d67693 GH |
237 | (ci->state & SUBMIT_STATUS_URB) ? " s-st" : "", |
238 | (ci->state & ALLOC_DATA_IN_URB) ? " a-in" : "", | |
239 | (ci->state & SUBMIT_DATA_IN_URB) ? " s-in" : "", | |
240 | (ci->state & ALLOC_DATA_OUT_URB) ? " a-out" : "", | |
241 | (ci->state & SUBMIT_DATA_OUT_URB) ? " s-out" : "", | |
242 | (ci->state & ALLOC_CMD_URB) ? " a-cmd" : "", | |
243 | (ci->state & SUBMIT_CMD_URB) ? " s-cmd" : "", | |
244 | (ci->state & COMMAND_INFLIGHT) ? " CMD" : "", | |
245 | (ci->state & DATA_IN_URB_INFLIGHT) ? " IN" : "", | |
246 | (ci->state & DATA_OUT_URB_INFLIGHT) ? " OUT" : "", | |
ef018cc9 | 247 | (ci->state & COMMAND_COMPLETED) ? " done" : "", |
b06e48af | 248 | (ci->state & COMMAND_ABORTED) ? " abort" : "", |
efefecf3 | 249 | (ci->state & IS_IN_WORK_LIST) ? " work" : ""); |
b1d67693 GH |
250 | } |
251 | ||
252 | static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller) | |
253 | { | |
254 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
e0648520 | 255 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
b1d67693 | 256 | |
ab945eff | 257 | lockdep_assert_held(&devinfo->lock); |
b1d67693 GH |
258 | if (cmdinfo->state & (COMMAND_INFLIGHT | |
259 | DATA_IN_URB_INFLIGHT | | |
60d9f67d | 260 | DATA_OUT_URB_INFLIGHT)) |
b1d67693 | 261 | return -EBUSY; |
f491ecbb | 262 | WARN_ON_ONCE(cmdinfo->state & COMMAND_COMPLETED); |
b1d67693 | 263 | cmdinfo->state |= COMMAND_COMPLETED; |
673331c8 | 264 | if (cmdinfo->state & COMMAND_ABORTED) |
0871d7d8 | 265 | scmd_printk(KERN_INFO, cmnd, "abort completed\n"); |
5e61aede | 266 | devinfo->cmnd[uas_get_tag(cmnd) - 1] = NULL; |
c621a81e | 267 | cmnd->scsi_done(cmnd); |
b1d67693 | 268 | return 0; |
115bb1ff MW |
269 | } |
270 | ||
271 | static void uas_xfer_data(struct urb *urb, struct scsi_cmnd *cmnd, | |
b1d67693 | 272 | unsigned direction) |
115bb1ff MW |
273 | { |
274 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
275 | int err; | |
276 | ||
b1d67693 | 277 | cmdinfo->state |= direction | SUBMIT_STATUS_URB; |
115bb1ff MW |
278 | err = uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_ATOMIC); |
279 | if (err) { | |
1bf8198e | 280 | uas_add_work(cmdinfo); |
115bb1ff MW |
281 | } |
282 | } | |
283 | ||
284 | static void uas_stat_cmplt(struct urb *urb) | |
285 | { | |
286 | struct iu *iu = urb->transfer_buffer; | |
22188f4a | 287 | struct Scsi_Host *shost = urb->context; |
21fc05b6 | 288 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
60d9f67d HG |
289 | struct urb *data_in_urb = NULL; |
290 | struct urb *data_out_urb = NULL; | |
115bb1ff | 291 | struct scsi_cmnd *cmnd; |
b1d67693 | 292 | struct uas_cmd_info *cmdinfo; |
e0648520 | 293 | unsigned long flags; |
5e61aede | 294 | unsigned int idx; |
115bb1ff | 295 | |
b7b5d11f HG |
296 | spin_lock_irqsave(&devinfo->lock, flags); |
297 | ||
298 | if (devinfo->resetting) | |
299 | goto out; | |
300 | ||
115bb1ff | 301 | if (urb->status) { |
326349f8 GH |
302 | if (urb->status == -ENOENT) { |
303 | dev_err(&urb->dev->dev, "stat urb: killed, stream %d\n", | |
304 | urb->stream_id); | |
305 | } else { | |
306 | dev_err(&urb->dev->dev, "stat urb: status %d\n", | |
307 | urb->status); | |
308 | } | |
b7b5d11f | 309 | goto out; |
023b515e GH |
310 | } |
311 | ||
5e61aede HG |
312 | idx = be16_to_cpup(&iu->tag) - 1; |
313 | if (idx >= MAX_CMNDS || !devinfo->cmnd[idx]) { | |
314 | dev_err(&urb->dev->dev, | |
315 | "stat urb: no pending cmd for tag %d\n", idx + 1); | |
b7b5d11f | 316 | goto out; |
5e61aede | 317 | } |
115bb1ff | 318 | |
5e61aede | 319 | cmnd = devinfo->cmnd[idx]; |
e0423dee | 320 | cmdinfo = (void *)&cmnd->SCp; |
d89da03a HG |
321 | |
322 | if (!(cmdinfo->state & COMMAND_INFLIGHT)) { | |
323 | scmd_printk(KERN_ERR, cmnd, "unexpected status cmplt\n"); | |
324 | goto out; | |
325 | } | |
326 | ||
115bb1ff MW |
327 | switch (iu->iu_id) { |
328 | case IU_ID_STATUS: | |
329 | if (urb->actual_length < 16) | |
330 | devinfo->uas_sense_old = 1; | |
331 | if (devinfo->uas_sense_old) | |
332 | uas_sense_old(urb, cmnd); | |
333 | else | |
334 | uas_sense(urb, cmnd); | |
8aac863e GH |
335 | if (cmnd->result != 0) { |
336 | /* cancel data transfers on error */ | |
60d9f67d HG |
337 | data_in_urb = usb_get_urb(cmdinfo->data_in_urb); |
338 | data_out_urb = usb_get_urb(cmdinfo->data_out_urb); | |
8aac863e | 339 | } |
b1d67693 GH |
340 | cmdinfo->state &= ~COMMAND_INFLIGHT; |
341 | uas_try_complete(cmnd, __func__); | |
115bb1ff MW |
342 | break; |
343 | case IU_ID_READ_READY: | |
8e453155 HG |
344 | if (!cmdinfo->data_in_urb || |
345 | (cmdinfo->state & DATA_IN_URB_INFLIGHT)) { | |
346 | scmd_printk(KERN_ERR, cmnd, "unexpected read rdy\n"); | |
347 | break; | |
348 | } | |
115bb1ff MW |
349 | uas_xfer_data(urb, cmnd, SUBMIT_DATA_IN_URB); |
350 | break; | |
351 | case IU_ID_WRITE_READY: | |
8e453155 HG |
352 | if (!cmdinfo->data_out_urb || |
353 | (cmdinfo->state & DATA_OUT_URB_INFLIGHT)) { | |
354 | scmd_printk(KERN_ERR, cmnd, "unexpected write rdy\n"); | |
355 | break; | |
356 | } | |
115bb1ff MW |
357 | uas_xfer_data(urb, cmnd, SUBMIT_DATA_OUT_URB); |
358 | break; | |
359 | default: | |
360 | scmd_printk(KERN_ERR, cmnd, | |
361 | "Bogus IU (%d) received on status pipe\n", iu->iu_id); | |
362 | } | |
b7b5d11f | 363 | out: |
e9bd7e1a | 364 | usb_free_urb(urb); |
e0648520 | 365 | spin_unlock_irqrestore(&devinfo->lock, flags); |
60d9f67d HG |
366 | |
367 | /* Unlinking of data urbs must be done without holding the lock */ | |
368 | if (data_in_urb) { | |
369 | usb_unlink_urb(data_in_urb); | |
370 | usb_put_urb(data_in_urb); | |
371 | } | |
372 | if (data_out_urb) { | |
373 | usb_unlink_urb(data_out_urb); | |
374 | usb_put_urb(data_out_urb); | |
375 | } | |
115bb1ff MW |
376 | } |
377 | ||
c621a81e | 378 | static void uas_data_cmplt(struct urb *urb) |
115bb1ff | 379 | { |
b1d67693 GH |
380 | struct scsi_cmnd *cmnd = urb->context; |
381 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
e0648520 | 382 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
b1d67693 | 383 | struct scsi_data_buffer *sdb = NULL; |
e0648520 | 384 | unsigned long flags; |
b1d67693 | 385 | |
e0648520 | 386 | spin_lock_irqsave(&devinfo->lock, flags); |
b7b5d11f | 387 | |
b1d67693 GH |
388 | if (cmdinfo->data_in_urb == urb) { |
389 | sdb = scsi_in(cmnd); | |
390 | cmdinfo->state &= ~DATA_IN_URB_INFLIGHT; | |
85fea825 | 391 | cmdinfo->data_in_urb = NULL; |
b1d67693 GH |
392 | } else if (cmdinfo->data_out_urb == urb) { |
393 | sdb = scsi_out(cmnd); | |
394 | cmdinfo->state &= ~DATA_OUT_URB_INFLIGHT; | |
85fea825 | 395 | cmdinfo->data_out_urb = NULL; |
b1d67693 | 396 | } |
f491ecbb GH |
397 | if (sdb == NULL) { |
398 | WARN_ON_ONCE(1); | |
b7b5d11f HG |
399 | goto out; |
400 | } | |
401 | ||
402 | if (devinfo->resetting) | |
403 | goto out; | |
404 | ||
d89da03a HG |
405 | /* Data urbs should not complete before the cmd urb is submitted */ |
406 | if (cmdinfo->state & SUBMIT_CMD_URB) { | |
407 | scmd_printk(KERN_ERR, cmnd, "unexpected data cmplt\n"); | |
408 | goto out; | |
409 | } | |
410 | ||
b7b5d11f | 411 | if (urb->status) { |
876285cc HG |
412 | if (urb->status != -ECONNRESET) { |
413 | uas_log_cmd_state(cmnd, __func__); | |
414 | scmd_printk(KERN_ERR, cmnd, | |
415 | "data cmplt err %d stream %d\n", | |
416 | urb->status, urb->stream_id); | |
417 | } | |
8aac863e GH |
418 | /* error: no data transfered */ |
419 | sdb->resid = sdb->length; | |
420 | } else { | |
421 | sdb->resid = sdb->length - urb->actual_length; | |
422 | } | |
b1d67693 | 423 | uas_try_complete(cmnd, __func__); |
b7b5d11f | 424 | out: |
85fea825 | 425 | usb_free_urb(urb); |
e0648520 | 426 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
427 | } |
428 | ||
876285cc HG |
429 | static void uas_cmd_cmplt(struct urb *urb) |
430 | { | |
431 | struct scsi_cmnd *cmnd = urb->context; | |
432 | ||
433 | if (urb->status) { | |
434 | uas_log_cmd_state(cmnd, __func__); | |
435 | scmd_printk(KERN_ERR, cmnd, "cmd cmplt err %d\n", urb->status); | |
436 | } | |
437 | usb_free_urb(urb); | |
438 | } | |
439 | ||
115bb1ff | 440 | static struct urb *uas_alloc_data_urb(struct uas_dev_info *devinfo, gfp_t gfp, |
b1d67693 GH |
441 | unsigned int pipe, u16 stream_id, |
442 | struct scsi_cmnd *cmnd, | |
443 | enum dma_data_direction dir) | |
115bb1ff MW |
444 | { |
445 | struct usb_device *udev = devinfo->udev; | |
446 | struct urb *urb = usb_alloc_urb(0, gfp); | |
b1d67693 GH |
447 | struct scsi_data_buffer *sdb = (dir == DMA_FROM_DEVICE) |
448 | ? scsi_in(cmnd) : scsi_out(cmnd); | |
115bb1ff MW |
449 | |
450 | if (!urb) | |
451 | goto out; | |
b1d67693 GH |
452 | usb_fill_bulk_urb(urb, udev, pipe, NULL, sdb->length, |
453 | uas_data_cmplt, cmnd); | |
c6d4579d | 454 | urb->stream_id = stream_id; |
115bb1ff MW |
455 | urb->num_sgs = udev->bus->sg_tablesize ? sdb->table.nents : 0; |
456 | urb->sg = sdb->table.sgl; | |
457 | out: | |
458 | return urb; | |
459 | } | |
460 | ||
461 | static struct urb *uas_alloc_sense_urb(struct uas_dev_info *devinfo, gfp_t gfp, | |
e9bd7e1a | 462 | struct Scsi_Host *shost, u16 stream_id) |
115bb1ff MW |
463 | { |
464 | struct usb_device *udev = devinfo->udev; | |
465 | struct urb *urb = usb_alloc_urb(0, gfp); | |
466 | struct sense_iu *iu; | |
467 | ||
468 | if (!urb) | |
469 | goto out; | |
470 | ||
ac563cfd | 471 | iu = kzalloc(sizeof(*iu), gfp); |
115bb1ff MW |
472 | if (!iu) |
473 | goto free; | |
474 | ||
475 | usb_fill_bulk_urb(urb, udev, devinfo->status_pipe, iu, sizeof(*iu), | |
e9bd7e1a | 476 | uas_stat_cmplt, shost); |
115bb1ff MW |
477 | urb->stream_id = stream_id; |
478 | urb->transfer_flags |= URB_FREE_BUFFER; | |
479 | out: | |
480 | return urb; | |
481 | free: | |
482 | usb_free_urb(urb); | |
483 | return NULL; | |
484 | } | |
485 | ||
486 | static struct urb *uas_alloc_cmd_urb(struct uas_dev_info *devinfo, gfp_t gfp, | |
a887cd36 | 487 | struct scsi_cmnd *cmnd) |
115bb1ff MW |
488 | { |
489 | struct usb_device *udev = devinfo->udev; | |
490 | struct scsi_device *sdev = cmnd->device; | |
491 | struct urb *urb = usb_alloc_urb(0, gfp); | |
492 | struct command_iu *iu; | |
493 | int len; | |
494 | ||
495 | if (!urb) | |
496 | goto out; | |
497 | ||
498 | len = cmnd->cmd_len - 16; | |
499 | if (len < 0) | |
500 | len = 0; | |
501 | len = ALIGN(len, 4); | |
ac563cfd | 502 | iu = kzalloc(sizeof(*iu) + len, gfp); |
115bb1ff MW |
503 | if (!iu) |
504 | goto free; | |
505 | ||
506 | iu->iu_id = IU_ID_COMMAND; | |
e0620001 | 507 | iu->tag = cpu_to_be16(uas_get_tag(cmnd)); |
02e031cb | 508 | iu->prio_attr = UAS_SIMPLE_TAG; |
115bb1ff MW |
509 | iu->len = len; |
510 | int_to_scsilun(sdev->lun, &iu->lun); | |
511 | memcpy(iu->cdb, cmnd->cmnd, cmnd->cmd_len); | |
512 | ||
513 | usb_fill_bulk_urb(urb, udev, devinfo->cmd_pipe, iu, sizeof(*iu) + len, | |
876285cc | 514 | uas_cmd_cmplt, cmnd); |
115bb1ff MW |
515 | urb->transfer_flags |= URB_FREE_BUFFER; |
516 | out: | |
517 | return urb; | |
518 | free: | |
519 | usb_free_urb(urb); | |
520 | return NULL; | |
521 | } | |
522 | ||
523 | /* | |
524 | * Why should I request the Status IU before sending the Command IU? Spec | |
525 | * says to, but also says the device may receive them in any order. Seems | |
526 | * daft to me. | |
527 | */ | |
528 | ||
876285cc | 529 | static struct urb *uas_submit_sense_urb(struct scsi_cmnd *cmnd, |
70cf0fba | 530 | gfp_t gfp, unsigned int stream) |
115bb1ff | 531 | { |
876285cc | 532 | struct Scsi_Host *shost = cmnd->device->host; |
21fc05b6 | 533 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
e9bd7e1a | 534 | struct urb *urb; |
876285cc | 535 | int err; |
115bb1ff | 536 | |
e9bd7e1a GH |
537 | urb = uas_alloc_sense_urb(devinfo, gfp, shost, stream); |
538 | if (!urb) | |
70cf0fba | 539 | return NULL; |
d5f808d3 | 540 | usb_anchor_urb(urb, &devinfo->sense_urbs); |
876285cc HG |
541 | err = usb_submit_urb(urb, gfp); |
542 | if (err) { | |
d5f808d3 | 543 | usb_unanchor_urb(urb); |
876285cc | 544 | uas_log_cmd_state(cmnd, __func__); |
e9bd7e1a | 545 | shost_printk(KERN_INFO, shost, |
876285cc HG |
546 | "sense urb submission error %d stream %d\n", |
547 | err, stream); | |
e9bd7e1a | 548 | usb_free_urb(urb); |
70cf0fba | 549 | return NULL; |
115bb1ff | 550 | } |
70cf0fba | 551 | return urb; |
e9bd7e1a GH |
552 | } |
553 | ||
554 | static int uas_submit_urbs(struct scsi_cmnd *cmnd, | |
555 | struct uas_dev_info *devinfo, gfp_t gfp) | |
556 | { | |
557 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
70cf0fba | 558 | struct urb *urb; |
876285cc | 559 | int err; |
115bb1ff | 560 | |
ab945eff | 561 | lockdep_assert_held(&devinfo->lock); |
92a3f767 | 562 | if (cmdinfo->state & SUBMIT_STATUS_URB) { |
876285cc | 563 | urb = uas_submit_sense_urb(cmnd, gfp, cmdinfo->stream); |
70cf0fba HG |
564 | if (!urb) |
565 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
92a3f767 | 566 | cmdinfo->state &= ~SUBMIT_STATUS_URB; |
115bb1ff MW |
567 | } |
568 | ||
569 | if (cmdinfo->state & ALLOC_DATA_IN_URB) { | |
570 | cmdinfo->data_in_urb = uas_alloc_data_urb(devinfo, gfp, | |
c621a81e | 571 | devinfo->data_in_pipe, cmdinfo->stream, |
b1d67693 | 572 | cmnd, DMA_FROM_DEVICE); |
115bb1ff MW |
573 | if (!cmdinfo->data_in_urb) |
574 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
575 | cmdinfo->state &= ~ALLOC_DATA_IN_URB; | |
576 | } | |
577 | ||
578 | if (cmdinfo->state & SUBMIT_DATA_IN_URB) { | |
d5f808d3 | 579 | usb_anchor_urb(cmdinfo->data_in_urb, &devinfo->data_urbs); |
876285cc HG |
580 | err = usb_submit_urb(cmdinfo->data_in_urb, gfp); |
581 | if (err) { | |
d5f808d3 | 582 | usb_unanchor_urb(cmdinfo->data_in_urb); |
876285cc | 583 | uas_log_cmd_state(cmnd, __func__); |
115bb1ff | 584 | scmd_printk(KERN_INFO, cmnd, |
876285cc HG |
585 | "data in urb submission error %d stream %d\n", |
586 | err, cmdinfo->data_in_urb->stream_id); | |
115bb1ff MW |
587 | return SCSI_MLQUEUE_DEVICE_BUSY; |
588 | } | |
589 | cmdinfo->state &= ~SUBMIT_DATA_IN_URB; | |
b1d67693 | 590 | cmdinfo->state |= DATA_IN_URB_INFLIGHT; |
115bb1ff MW |
591 | } |
592 | ||
593 | if (cmdinfo->state & ALLOC_DATA_OUT_URB) { | |
594 | cmdinfo->data_out_urb = uas_alloc_data_urb(devinfo, gfp, | |
c621a81e | 595 | devinfo->data_out_pipe, cmdinfo->stream, |
b1d67693 | 596 | cmnd, DMA_TO_DEVICE); |
115bb1ff MW |
597 | if (!cmdinfo->data_out_urb) |
598 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
599 | cmdinfo->state &= ~ALLOC_DATA_OUT_URB; | |
600 | } | |
601 | ||
602 | if (cmdinfo->state & SUBMIT_DATA_OUT_URB) { | |
d5f808d3 | 603 | usb_anchor_urb(cmdinfo->data_out_urb, &devinfo->data_urbs); |
876285cc HG |
604 | err = usb_submit_urb(cmdinfo->data_out_urb, gfp); |
605 | if (err) { | |
d5f808d3 | 606 | usb_unanchor_urb(cmdinfo->data_out_urb); |
876285cc | 607 | uas_log_cmd_state(cmnd, __func__); |
115bb1ff | 608 | scmd_printk(KERN_INFO, cmnd, |
876285cc HG |
609 | "data out urb submission error %d stream %d\n", |
610 | err, cmdinfo->data_out_urb->stream_id); | |
115bb1ff MW |
611 | return SCSI_MLQUEUE_DEVICE_BUSY; |
612 | } | |
613 | cmdinfo->state &= ~SUBMIT_DATA_OUT_URB; | |
b1d67693 | 614 | cmdinfo->state |= DATA_OUT_URB_INFLIGHT; |
115bb1ff MW |
615 | } |
616 | ||
617 | if (cmdinfo->state & ALLOC_CMD_URB) { | |
a887cd36 | 618 | cmdinfo->cmd_urb = uas_alloc_cmd_urb(devinfo, gfp, cmnd); |
115bb1ff MW |
619 | if (!cmdinfo->cmd_urb) |
620 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
621 | cmdinfo->state &= ~ALLOC_CMD_URB; | |
622 | } | |
623 | ||
624 | if (cmdinfo->state & SUBMIT_CMD_URB) { | |
d5f808d3 | 625 | usb_anchor_urb(cmdinfo->cmd_urb, &devinfo->cmd_urbs); |
876285cc HG |
626 | err = usb_submit_urb(cmdinfo->cmd_urb, gfp); |
627 | if (err) { | |
d5f808d3 | 628 | usb_unanchor_urb(cmdinfo->cmd_urb); |
876285cc | 629 | uas_log_cmd_state(cmnd, __func__); |
115bb1ff | 630 | scmd_printk(KERN_INFO, cmnd, |
876285cc | 631 | "cmd urb submission error %d\n", err); |
115bb1ff MW |
632 | return SCSI_MLQUEUE_DEVICE_BUSY; |
633 | } | |
a0e39e34 | 634 | cmdinfo->cmd_urb = NULL; |
115bb1ff | 635 | cmdinfo->state &= ~SUBMIT_CMD_URB; |
b1d67693 | 636 | cmdinfo->state |= COMMAND_INFLIGHT; |
115bb1ff MW |
637 | } |
638 | ||
639 | return 0; | |
640 | } | |
641 | ||
f281233d | 642 | static int uas_queuecommand_lck(struct scsi_cmnd *cmnd, |
115bb1ff MW |
643 | void (*done)(struct scsi_cmnd *)) |
644 | { | |
645 | struct scsi_device *sdev = cmnd->device; | |
646 | struct uas_dev_info *devinfo = sdev->hostdata; | |
647 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
e0648520 | 648 | unsigned long flags; |
5e61aede | 649 | unsigned int stream; |
115bb1ff MW |
650 | int err; |
651 | ||
652 | BUILD_BUG_ON(sizeof(struct uas_cmd_info) > sizeof(struct scsi_pointer)); | |
653 | ||
59307852 HG |
654 | if ((devinfo->flags & US_FL_NO_ATA_1X) && |
655 | (cmnd->cmnd[0] == ATA_12 || cmnd->cmnd[0] == ATA_16)) { | |
656 | memcpy(cmnd->sense_buffer, usb_stor_sense_invalidCDB, | |
657 | sizeof(usb_stor_sense_invalidCDB)); | |
658 | cmnd->result = SAM_STAT_CHECK_CONDITION; | |
659 | cmnd->scsi_done(cmnd); | |
660 | return 0; | |
661 | } | |
662 | ||
c6f63207 HG |
663 | spin_lock_irqsave(&devinfo->lock, flags); |
664 | ||
f8be6bfc GH |
665 | if (devinfo->resetting) { |
666 | cmnd->result = DID_ERROR << 16; | |
667 | cmnd->scsi_done(cmnd); | |
c6f63207 | 668 | spin_unlock_irqrestore(&devinfo->lock, flags); |
f8be6bfc GH |
669 | return 0; |
670 | } | |
671 | ||
5e61aede HG |
672 | stream = uas_get_tag(cmnd); |
673 | if (devinfo->cmnd[stream - 1]) { | |
e0648520 | 674 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff | 675 | return SCSI_MLQUEUE_DEVICE_BUSY; |
e0648520 | 676 | } |
115bb1ff | 677 | |
115bb1ff MW |
678 | cmnd->scsi_done = done; |
679 | ||
5e61aede HG |
680 | memset(cmdinfo, 0, sizeof(*cmdinfo)); |
681 | cmdinfo->stream = stream; | |
e0620001 | 682 | cmdinfo->state = SUBMIT_STATUS_URB | ALLOC_CMD_URB | SUBMIT_CMD_URB; |
115bb1ff MW |
683 | |
684 | switch (cmnd->sc_data_direction) { | |
685 | case DMA_FROM_DEVICE: | |
686 | cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB; | |
687 | break; | |
688 | case DMA_BIDIRECTIONAL: | |
689 | cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB; | |
690 | case DMA_TO_DEVICE: | |
691 | cmdinfo->state |= ALLOC_DATA_OUT_URB | SUBMIT_DATA_OUT_URB; | |
692 | case DMA_NONE: | |
693 | break; | |
694 | } | |
695 | ||
696 | if (!devinfo->use_streams) { | |
db32de11 | 697 | cmdinfo->state &= ~(SUBMIT_DATA_IN_URB | SUBMIT_DATA_OUT_URB); |
115bb1ff MW |
698 | cmdinfo->stream = 0; |
699 | } | |
700 | ||
701 | err = uas_submit_urbs(cmnd, devinfo, GFP_ATOMIC); | |
702 | if (err) { | |
703 | /* If we did nothing, give up now */ | |
92a3f767 | 704 | if (cmdinfo->state & SUBMIT_STATUS_URB) { |
e0648520 | 705 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
706 | return SCSI_MLQUEUE_DEVICE_BUSY; |
707 | } | |
1bf8198e | 708 | uas_add_work(cmdinfo); |
115bb1ff MW |
709 | } |
710 | ||
5e61aede | 711 | devinfo->cmnd[stream - 1] = cmnd; |
e0648520 | 712 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
713 | return 0; |
714 | } | |
715 | ||
f281233d JG |
716 | static DEF_SCSI_QCMD(uas_queuecommand) |
717 | ||
115bb1ff MW |
718 | static int uas_eh_bus_reset_handler(struct scsi_cmnd *cmnd) |
719 | { | |
720 | struct scsi_device *sdev = cmnd->device; | |
721 | struct uas_dev_info *devinfo = sdev->hostdata; | |
722 | struct usb_device *udev = devinfo->udev; | |
b7b5d11f | 723 | unsigned long flags; |
023b515e | 724 | int err; |
115bb1ff | 725 | |
be326f4c HG |
726 | err = usb_lock_device_for_reset(udev, devinfo->intf); |
727 | if (err) { | |
728 | shost_printk(KERN_ERR, sdev->host, | |
729 | "%s FAILED to get lock err %d\n", __func__, err); | |
730 | return FAILED; | |
731 | } | |
732 | ||
326349f8 | 733 | shost_printk(KERN_INFO, sdev->host, "%s start\n", __func__); |
b7b5d11f HG |
734 | |
735 | spin_lock_irqsave(&devinfo->lock, flags); | |
023b515e | 736 | devinfo->resetting = 1; |
b7b5d11f HG |
737 | spin_unlock_irqrestore(&devinfo->lock, flags); |
738 | ||
a0e39e34 | 739 | usb_kill_anchored_urbs(&devinfo->cmd_urbs); |
023b515e GH |
740 | usb_kill_anchored_urbs(&devinfo->sense_urbs); |
741 | usb_kill_anchored_urbs(&devinfo->data_urbs); | |
1589349f HG |
742 | uas_zap_pending(devinfo, DID_RESET); |
743 | ||
023b515e | 744 | err = usb_reset_device(udev); |
b7b5d11f HG |
745 | |
746 | spin_lock_irqsave(&devinfo->lock, flags); | |
023b515e | 747 | devinfo->resetting = 0; |
b7b5d11f | 748 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff | 749 | |
be326f4c HG |
750 | usb_unlock_device(udev); |
751 | ||
023b515e GH |
752 | if (err) { |
753 | shost_printk(KERN_INFO, sdev->host, "%s FAILED\n", __func__); | |
754 | return FAILED; | |
755 | } | |
115bb1ff | 756 | |
023b515e GH |
757 | shost_printk(KERN_INFO, sdev->host, "%s success\n", __func__); |
758 | return SUCCESS; | |
115bb1ff MW |
759 | } |
760 | ||
761 | static int uas_slave_alloc(struct scsi_device *sdev) | |
762 | { | |
21fc05b6 | 763 | sdev->hostdata = (void *)sdev->host->hostdata; |
37599f96 HG |
764 | |
765 | /* USB has unusual DMA-alignment requirements: Although the | |
766 | * starting address of each scatter-gather element doesn't matter, | |
767 | * the length of each element except the last must be divisible | |
768 | * by the Bulk maxpacket value. There's currently no way to | |
769 | * express this by block-layer constraints, so we'll cop out | |
770 | * and simply require addresses to be aligned at 512-byte | |
771 | * boundaries. This is okay since most block I/O involves | |
772 | * hardware sectors that are multiples of 512 bytes in length, | |
773 | * and since host controllers up through USB 2.0 have maxpacket | |
774 | * values no larger than 512. | |
775 | * | |
776 | * But it doesn't suffice for Wireless USB, where Bulk maxpacket | |
777 | * values can be as large as 2048. To make that work properly | |
778 | * will require changes to the block layer. | |
779 | */ | |
780 | blk_queue_update_dma_alignment(sdev->request_queue, (512 - 1)); | |
781 | ||
115bb1ff MW |
782 | return 0; |
783 | } | |
784 | ||
785 | static int uas_slave_configure(struct scsi_device *sdev) | |
786 | { | |
787 | struct uas_dev_info *devinfo = sdev->hostdata; | |
734016b0 HG |
788 | |
789 | if (devinfo->flags & US_FL_NO_REPORT_OPCODES) | |
790 | sdev->no_report_opcodes = 1; | |
791 | ||
115bb1ff | 792 | scsi_set_tag_type(sdev, MSG_ORDERED_TAG); |
d3f7c156 | 793 | scsi_activate_tcq(sdev, devinfo->qdepth - 2); |
115bb1ff MW |
794 | return 0; |
795 | } | |
796 | ||
797 | static struct scsi_host_template uas_host_template = { | |
798 | .module = THIS_MODULE, | |
799 | .name = "uas", | |
800 | .queuecommand = uas_queuecommand, | |
801 | .slave_alloc = uas_slave_alloc, | |
802 | .slave_configure = uas_slave_configure, | |
115bb1ff MW |
803 | .eh_bus_reset_handler = uas_eh_bus_reset_handler, |
804 | .can_queue = 65536, /* Is there a limit on the _host_ ? */ | |
805 | .this_id = -1, | |
806 | .sg_tablesize = SG_NONE, | |
807 | .cmd_per_lun = 1, /* until we override it */ | |
808 | .skip_settle_delay = 1, | |
809 | .ordered_tag = 1, | |
810 | }; | |
811 | ||
79b4c061 HG |
812 | #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \ |
813 | vendorName, productName, useProtocol, useTransport, \ | |
814 | initFunction, flags) \ | |
815 | { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \ | |
816 | .driver_info = (flags) } | |
817 | ||
115bb1ff | 818 | static struct usb_device_id uas_usb_ids[] = { |
79b4c061 | 819 | # include "unusual_uas.h" |
115bb1ff MW |
820 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_BULK) }, |
821 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_UAS) }, | |
822 | /* 0xaa is a prototype device I happen to have access to */ | |
823 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, 0xaa) }, | |
824 | { } | |
825 | }; | |
826 | MODULE_DEVICE_TABLE(usb, uas_usb_ids); | |
827 | ||
79b4c061 HG |
828 | #undef UNUSUAL_DEV |
829 | ||
e1be067b HG |
830 | static int uas_switch_interface(struct usb_device *udev, |
831 | struct usb_interface *intf) | |
832 | { | |
833 | int alt; | |
834 | ||
835 | alt = uas_find_uas_alt_setting(intf); | |
836 | if (alt < 0) | |
837 | return alt; | |
838 | ||
839 | return usb_set_interface(udev, | |
840 | intf->altsetting[0].desc.bInterfaceNumber, alt); | |
841 | } | |
842 | ||
58d51444 | 843 | static int uas_configure_endpoints(struct uas_dev_info *devinfo) |
34f11e59 HG |
844 | { |
845 | struct usb_host_endpoint *eps[4] = { }; | |
846 | struct usb_device *udev = devinfo->udev; | |
847 | int r; | |
848 | ||
849 | devinfo->uas_sense_old = 0; | |
34f11e59 HG |
850 | |
851 | r = uas_find_endpoints(devinfo->intf->cur_altsetting, eps); | |
74d71aec HG |
852 | if (r) |
853 | return r; | |
854 | ||
855 | devinfo->cmd_pipe = usb_sndbulkpipe(udev, | |
856 | usb_endpoint_num(&eps[0]->desc)); | |
857 | devinfo->status_pipe = usb_rcvbulkpipe(udev, | |
858 | usb_endpoint_num(&eps[1]->desc)); | |
859 | devinfo->data_in_pipe = usb_rcvbulkpipe(udev, | |
860 | usb_endpoint_num(&eps[2]->desc)); | |
861 | devinfo->data_out_pipe = usb_sndbulkpipe(udev, | |
862 | usb_endpoint_num(&eps[3]->desc)); | |
115bb1ff | 863 | |
58d51444 | 864 | if (udev->speed != USB_SPEED_SUPER) { |
e2875c33 | 865 | devinfo->qdepth = 32; |
115bb1ff MW |
866 | devinfo->use_streams = 0; |
867 | } else { | |
58d51444 | 868 | devinfo->qdepth = usb_alloc_streams(devinfo->intf, eps + 1, |
5e61aede | 869 | 3, MAX_CMNDS, GFP_NOIO); |
58d51444 HG |
870 | if (devinfo->qdepth < 0) |
871 | return devinfo->qdepth; | |
115bb1ff MW |
872 | devinfo->use_streams = 1; |
873 | } | |
58d51444 HG |
874 | |
875 | return 0; | |
115bb1ff MW |
876 | } |
877 | ||
dae51546 SAS |
878 | static void uas_free_streams(struct uas_dev_info *devinfo) |
879 | { | |
880 | struct usb_device *udev = devinfo->udev; | |
881 | struct usb_host_endpoint *eps[3]; | |
882 | ||
883 | eps[0] = usb_pipe_endpoint(udev, devinfo->status_pipe); | |
884 | eps[1] = usb_pipe_endpoint(udev, devinfo->data_in_pipe); | |
885 | eps[2] = usb_pipe_endpoint(udev, devinfo->data_out_pipe); | |
94d72f00 | 886 | usb_free_streams(devinfo->intf, eps, 3, GFP_NOIO); |
dae51546 SAS |
887 | } |
888 | ||
115bb1ff MW |
889 | static int uas_probe(struct usb_interface *intf, const struct usb_device_id *id) |
890 | { | |
6ce8213b HG |
891 | int result = -ENOMEM; |
892 | struct Scsi_Host *shost = NULL; | |
115bb1ff MW |
893 | struct uas_dev_info *devinfo; |
894 | struct usb_device *udev = interface_to_usbdev(intf); | |
895 | ||
79b4c061 HG |
896 | if (!uas_use_uas_driver(intf, id)) |
897 | return -ENODEV; | |
898 | ||
89dc2905 MW |
899 | if (uas_switch_interface(udev, intf)) |
900 | return -ENODEV; | |
115bb1ff | 901 | |
21fc05b6 HG |
902 | shost = scsi_host_alloc(&uas_host_template, |
903 | sizeof(struct uas_dev_info)); | |
115bb1ff | 904 | if (!shost) |
6ce8213b | 905 | goto set_alt0; |
115bb1ff MW |
906 | |
907 | shost->max_cmd_len = 16 + 252; | |
908 | shost->max_id = 1; | |
bde027b4 GH |
909 | shost->max_lun = 256; |
910 | shost->max_channel = 0; | |
115bb1ff MW |
911 | shost->sg_tablesize = udev->bus->sg_tablesize; |
912 | ||
21fc05b6 | 913 | devinfo = (struct uas_dev_info *)shost->hostdata; |
115bb1ff MW |
914 | devinfo->intf = intf; |
915 | devinfo->udev = udev; | |
023b515e | 916 | devinfo->resetting = 0; |
da65c2bb | 917 | devinfo->shutdown = 0; |
59307852 HG |
918 | devinfo->flags = id->driver_info; |
919 | usb_stor_adjust_quirks(udev, &devinfo->flags); | |
a0e39e34 | 920 | init_usb_anchor(&devinfo->cmd_urbs); |
bdd000fb GH |
921 | init_usb_anchor(&devinfo->sense_urbs); |
922 | init_usb_anchor(&devinfo->data_urbs); | |
e0648520 | 923 | spin_lock_init(&devinfo->lock); |
1bf8198e | 924 | INIT_WORK(&devinfo->work, uas_do_work); |
58d51444 HG |
925 | |
926 | result = uas_configure_endpoints(devinfo); | |
927 | if (result) | |
928 | goto set_alt0; | |
115bb1ff | 929 | |
d3f7c156 | 930 | result = scsi_init_shared_tag_map(shost, devinfo->qdepth - 2); |
115bb1ff | 931 | if (result) |
6ce8213b | 932 | goto free_streams; |
dae51546 | 933 | |
c637f1fa | 934 | usb_set_intfdata(intf, shost); |
dae51546 SAS |
935 | result = scsi_add_host(shost, &intf->dev); |
936 | if (result) | |
6ce8213b | 937 | goto free_streams; |
dae51546 | 938 | |
115bb1ff | 939 | scsi_scan_host(shost); |
115bb1ff | 940 | return result; |
dae51546 | 941 | |
6ce8213b | 942 | free_streams: |
dae51546 | 943 | uas_free_streams(devinfo); |
c637f1fa | 944 | usb_set_intfdata(intf, NULL); |
6ce8213b HG |
945 | set_alt0: |
946 | usb_set_interface(udev, intf->altsetting[0].desc.bInterfaceNumber, 0); | |
115bb1ff MW |
947 | if (shost) |
948 | scsi_host_put(shost); | |
949 | return result; | |
950 | } | |
951 | ||
952 | static int uas_pre_reset(struct usb_interface *intf) | |
953 | { | |
4de7a373 | 954 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
21fc05b6 | 955 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
4de7a373 HG |
956 | unsigned long flags; |
957 | ||
da65c2bb HG |
958 | if (devinfo->shutdown) |
959 | return 0; | |
960 | ||
4de7a373 HG |
961 | /* Block new requests */ |
962 | spin_lock_irqsave(shost->host_lock, flags); | |
963 | scsi_block_requests(shost); | |
964 | spin_unlock_irqrestore(shost->host_lock, flags); | |
965 | ||
966 | /* Wait for any pending requests to complete */ | |
967 | flush_work(&devinfo->work); | |
968 | if (usb_wait_anchor_empty_timeout(&devinfo->sense_urbs, 5000) == 0) { | |
969 | shost_printk(KERN_ERR, shost, "%s: timed out\n", __func__); | |
970 | return 1; | |
971 | } | |
972 | ||
973 | uas_free_streams(devinfo); | |
974 | ||
115bb1ff MW |
975 | return 0; |
976 | } | |
977 | ||
978 | static int uas_post_reset(struct usb_interface *intf) | |
979 | { | |
4de7a373 | 980 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
21fc05b6 | 981 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
4de7a373 HG |
982 | unsigned long flags; |
983 | ||
da65c2bb HG |
984 | if (devinfo->shutdown) |
985 | return 0; | |
986 | ||
58d51444 HG |
987 | if (uas_configure_endpoints(devinfo) != 0) { |
988 | shost_printk(KERN_ERR, shost, | |
989 | "%s: alloc streams error after reset", __func__); | |
990 | return 1; | |
991 | } | |
4de7a373 HG |
992 | |
993 | spin_lock_irqsave(shost->host_lock, flags); | |
994 | scsi_report_bus_reset(shost, 0); | |
995 | spin_unlock_irqrestore(shost->host_lock, flags); | |
996 | ||
997 | scsi_unblock_requests(shost); | |
998 | ||
115bb1ff MW |
999 | return 0; |
1000 | } | |
1001 | ||
0df1f663 HG |
1002 | static int uas_suspend(struct usb_interface *intf, pm_message_t message) |
1003 | { | |
1004 | struct Scsi_Host *shost = usb_get_intfdata(intf); | |
21fc05b6 | 1005 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
0df1f663 HG |
1006 | |
1007 | /* Wait for any pending requests to complete */ | |
1008 | flush_work(&devinfo->work); | |
1009 | if (usb_wait_anchor_empty_timeout(&devinfo->sense_urbs, 5000) == 0) { | |
1010 | shost_printk(KERN_ERR, shost, "%s: timed out\n", __func__); | |
1011 | return -ETIME; | |
1012 | } | |
1013 | ||
1014 | return 0; | |
1015 | } | |
1016 | ||
1017 | static int uas_resume(struct usb_interface *intf) | |
1018 | { | |
1019 | return 0; | |
1020 | } | |
1021 | ||
1022 | static int uas_reset_resume(struct usb_interface *intf) | |
1023 | { | |
1024 | struct Scsi_Host *shost = usb_get_intfdata(intf); | |
21fc05b6 | 1025 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
0df1f663 HG |
1026 | unsigned long flags; |
1027 | ||
1028 | if (uas_configure_endpoints(devinfo) != 0) { | |
1029 | shost_printk(KERN_ERR, shost, | |
1030 | "%s: alloc streams error after reset", __func__); | |
1031 | return -EIO; | |
1032 | } | |
1033 | ||
1034 | spin_lock_irqsave(shost->host_lock, flags); | |
1035 | scsi_report_bus_reset(shost, 0); | |
1036 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1037 | ||
1038 | return 0; | |
1039 | } | |
1040 | ||
115bb1ff MW |
1041 | static void uas_disconnect(struct usb_interface *intf) |
1042 | { | |
115bb1ff | 1043 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
21fc05b6 | 1044 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
b7b5d11f | 1045 | unsigned long flags; |
115bb1ff | 1046 | |
b7b5d11f | 1047 | spin_lock_irqsave(&devinfo->lock, flags); |
4c456971 | 1048 | devinfo->resetting = 1; |
b7b5d11f HG |
1049 | spin_unlock_irqrestore(&devinfo->lock, flags); |
1050 | ||
1bf8198e | 1051 | cancel_work_sync(&devinfo->work); |
a0e39e34 | 1052 | usb_kill_anchored_urbs(&devinfo->cmd_urbs); |
bdd000fb GH |
1053 | usb_kill_anchored_urbs(&devinfo->sense_urbs); |
1054 | usb_kill_anchored_urbs(&devinfo->data_urbs); | |
1589349f HG |
1055 | uas_zap_pending(devinfo, DID_NO_CONNECT); |
1056 | ||
4c456971 | 1057 | scsi_remove_host(shost); |
dae51546 | 1058 | uas_free_streams(devinfo); |
21fc05b6 | 1059 | scsi_host_put(shost); |
115bb1ff MW |
1060 | } |
1061 | ||
da65c2bb HG |
1062 | /* |
1063 | * Put the device back in usb-storage mode on shutdown, as some BIOS-es | |
1064 | * hang on reboot when the device is still in uas mode. Note the reset is | |
1065 | * necessary as some devices won't revert to usb-storage mode without it. | |
1066 | */ | |
1067 | static void uas_shutdown(struct device *dev) | |
1068 | { | |
1069 | struct usb_interface *intf = to_usb_interface(dev); | |
1070 | struct usb_device *udev = interface_to_usbdev(intf); | |
1071 | struct Scsi_Host *shost = usb_get_intfdata(intf); | |
21fc05b6 | 1072 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
da65c2bb HG |
1073 | |
1074 | if (system_state != SYSTEM_RESTART) | |
1075 | return; | |
1076 | ||
1077 | devinfo->shutdown = 1; | |
1078 | uas_free_streams(devinfo); | |
1079 | usb_set_interface(udev, intf->altsetting[0].desc.bInterfaceNumber, 0); | |
1080 | usb_reset_device(udev); | |
1081 | } | |
1082 | ||
115bb1ff MW |
1083 | static struct usb_driver uas_driver = { |
1084 | .name = "uas", | |
1085 | .probe = uas_probe, | |
1086 | .disconnect = uas_disconnect, | |
1087 | .pre_reset = uas_pre_reset, | |
1088 | .post_reset = uas_post_reset, | |
0df1f663 HG |
1089 | .suspend = uas_suspend, |
1090 | .resume = uas_resume, | |
1091 | .reset_resume = uas_reset_resume, | |
da65c2bb | 1092 | .drvwrap.driver.shutdown = uas_shutdown, |
115bb1ff MW |
1093 | .id_table = uas_usb_ids, |
1094 | }; | |
1095 | ||
65db4305 | 1096 | module_usb_driver(uas_driver); |
115bb1ff MW |
1097 | |
1098 | MODULE_LICENSE("GPL"); | |
f50a4968 HG |
1099 | MODULE_AUTHOR( |
1100 | "Hans de Goede <hdegoede@redhat.com>, Matthew Wilcox and Sarah Sharp"); |