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 | 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 { | |
92a3f767 | 52 | SUBMIT_STATUS_URB = (1 << 1), |
115bb1ff MW |
53 | ALLOC_DATA_IN_URB = (1 << 2), |
54 | SUBMIT_DATA_IN_URB = (1 << 3), | |
55 | ALLOC_DATA_OUT_URB = (1 << 4), | |
56 | SUBMIT_DATA_OUT_URB = (1 << 5), | |
57 | ALLOC_CMD_URB = (1 << 6), | |
58 | SUBMIT_CMD_URB = (1 << 7), | |
b1d67693 GH |
59 | COMMAND_INFLIGHT = (1 << 8), |
60 | DATA_IN_URB_INFLIGHT = (1 << 9), | |
61 | DATA_OUT_URB_INFLIGHT = (1 << 10), | |
eb7d664a HG |
62 | COMMAND_ABORTED = (1 << 11), |
63 | IS_IN_WORK_LIST = (1 << 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, | |
77 | struct uas_dev_info *devinfo, gfp_t gfp); | |
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 | ||
e7eda932 | 108 | err = uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_ATOMIC); |
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; |
115bb1ff MW |
243 | err = uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_ATOMIC); |
244 | if (err) { | |
1bf8198e | 245 | uas_add_work(cmdinfo); |
115bb1ff MW |
246 | } |
247 | } | |
248 | ||
249 | static void uas_stat_cmplt(struct urb *urb) | |
250 | { | |
251 | struct iu *iu = urb->transfer_buffer; | |
22188f4a | 252 | struct Scsi_Host *shost = urb->context; |
21fc05b6 | 253 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
60d9f67d HG |
254 | struct urb *data_in_urb = NULL; |
255 | struct urb *data_out_urb = NULL; | |
115bb1ff | 256 | struct scsi_cmnd *cmnd; |
b1d67693 | 257 | struct uas_cmd_info *cmdinfo; |
e0648520 | 258 | unsigned long flags; |
5e61aede | 259 | unsigned int idx; |
cca26be3 | 260 | int status = urb->status; |
115bb1ff | 261 | |
b7b5d11f HG |
262 | spin_lock_irqsave(&devinfo->lock, flags); |
263 | ||
264 | if (devinfo->resetting) | |
265 | goto out; | |
115bb1ff | 266 | |
cca26be3 ON |
267 | if (status) { |
268 | if (status != -ENOENT && status != -ECONNRESET && status != -ESHUTDOWN) | |
269 | dev_err(&urb->dev->dev, "stat urb: status %d\n", status); | |
b7b5d11f | 270 | goto out; |
115bb1ff MW |
271 | } |
272 | ||
5e61aede HG |
273 | idx = be16_to_cpup(&iu->tag) - 1; |
274 | if (idx >= MAX_CMNDS || !devinfo->cmnd[idx]) { | |
275 | dev_err(&urb->dev->dev, | |
e28e2f2f | 276 | "stat urb: no pending cmd for uas-tag %d\n", idx + 1); |
b7b5d11f | 277 | goto out; |
023b515e GH |
278 | } |
279 | ||
5e61aede | 280 | cmnd = devinfo->cmnd[idx]; |
e0423dee | 281 | cmdinfo = (void *)&cmnd->SCp; |
d89da03a HG |
282 | |
283 | if (!(cmdinfo->state & COMMAND_INFLIGHT)) { | |
1ad7ed5a | 284 | uas_log_cmd_state(cmnd, "unexpected status cmplt", 0); |
d89da03a | 285 | goto out; |
96c1eb98 | 286 | } |
115bb1ff MW |
287 | |
288 | switch (iu->iu_id) { | |
289 | case IU_ID_STATUS: | |
5ad22cfc | 290 | uas_sense(urb, cmnd); |
8aac863e GH |
291 | if (cmnd->result != 0) { |
292 | /* cancel data transfers on error */ | |
60d9f67d HG |
293 | data_in_urb = usb_get_urb(cmdinfo->data_in_urb); |
294 | data_out_urb = usb_get_urb(cmdinfo->data_out_urb); | |
8aac863e | 295 | } |
b1d67693 GH |
296 | cmdinfo->state &= ~COMMAND_INFLIGHT; |
297 | uas_try_complete(cmnd, __func__); | |
115bb1ff MW |
298 | break; |
299 | case IU_ID_READ_READY: | |
8e453155 HG |
300 | if (!cmdinfo->data_in_urb || |
301 | (cmdinfo->state & DATA_IN_URB_INFLIGHT)) { | |
1ad7ed5a | 302 | uas_log_cmd_state(cmnd, "unexpected read rdy", 0); |
8e453155 HG |
303 | break; |
304 | } | |
115bb1ff MW |
305 | uas_xfer_data(urb, cmnd, SUBMIT_DATA_IN_URB); |
306 | break; | |
307 | case IU_ID_WRITE_READY: | |
8e453155 HG |
308 | if (!cmdinfo->data_out_urb || |
309 | (cmdinfo->state & DATA_OUT_URB_INFLIGHT)) { | |
1ad7ed5a | 310 | uas_log_cmd_state(cmnd, "unexpected write rdy", 0); |
8e453155 HG |
311 | break; |
312 | } | |
115bb1ff MW |
313 | uas_xfer_data(urb, cmnd, SUBMIT_DATA_OUT_URB); |
314 | break; | |
fac1f485 HG |
315 | case IU_ID_RESPONSE: |
316 | uas_log_cmd_state(cmnd, "unexpected response iu", | |
317 | ((struct response_iu *)iu)->response_code); | |
318 | /* Error, cancel data transfers */ | |
319 | data_in_urb = usb_get_urb(cmdinfo->data_in_urb); | |
320 | data_out_urb = usb_get_urb(cmdinfo->data_out_urb); | |
321 | cmdinfo->state &= ~COMMAND_INFLIGHT; | |
322 | cmnd->result = DID_ERROR << 16; | |
323 | uas_try_complete(cmnd, __func__); | |
324 | break; | |
115bb1ff | 325 | default: |
1ad7ed5a | 326 | uas_log_cmd_state(cmnd, "bogus IU", iu->iu_id); |
115bb1ff | 327 | } |
b7b5d11f | 328 | out: |
e9bd7e1a | 329 | usb_free_urb(urb); |
e0648520 | 330 | spin_unlock_irqrestore(&devinfo->lock, flags); |
60d9f67d HG |
331 | |
332 | /* Unlinking of data urbs must be done without holding the lock */ | |
333 | if (data_in_urb) { | |
334 | usb_unlink_urb(data_in_urb); | |
335 | usb_put_urb(data_in_urb); | |
336 | } | |
337 | if (data_out_urb) { | |
338 | usb_unlink_urb(data_out_urb); | |
339 | usb_put_urb(data_out_urb); | |
340 | } | |
115bb1ff MW |
341 | } |
342 | ||
c621a81e | 343 | static void uas_data_cmplt(struct urb *urb) |
115bb1ff | 344 | { |
b1d67693 GH |
345 | struct scsi_cmnd *cmnd = urb->context; |
346 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
e0648520 | 347 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
b1d67693 | 348 | struct scsi_data_buffer *sdb = NULL; |
e0648520 | 349 | unsigned long flags; |
cca26be3 | 350 | int status = urb->status; |
b1d67693 | 351 | |
e0648520 | 352 | spin_lock_irqsave(&devinfo->lock, flags); |
b7b5d11f | 353 | |
b1d67693 GH |
354 | if (cmdinfo->data_in_urb == urb) { |
355 | sdb = scsi_in(cmnd); | |
356 | cmdinfo->state &= ~DATA_IN_URB_INFLIGHT; | |
85fea825 | 357 | cmdinfo->data_in_urb = NULL; |
b1d67693 GH |
358 | } else if (cmdinfo->data_out_urb == urb) { |
359 | sdb = scsi_out(cmnd); | |
360 | cmdinfo->state &= ~DATA_OUT_URB_INFLIGHT; | |
85fea825 | 361 | cmdinfo->data_out_urb = NULL; |
b1d67693 | 362 | } |
f491ecbb GH |
363 | if (sdb == NULL) { |
364 | WARN_ON_ONCE(1); | |
b7b5d11f HG |
365 | goto out; |
366 | } | |
367 | ||
368 | if (devinfo->resetting) | |
369 | goto out; | |
370 | ||
d89da03a HG |
371 | /* Data urbs should not complete before the cmd urb is submitted */ |
372 | if (cmdinfo->state & SUBMIT_CMD_URB) { | |
1ad7ed5a | 373 | uas_log_cmd_state(cmnd, "unexpected data cmplt", 0); |
d89da03a HG |
374 | goto out; |
375 | } | |
376 | ||
cca26be3 ON |
377 | if (status) { |
378 | if (status != -ENOENT && status != -ECONNRESET && status != -ESHUTDOWN) | |
379 | uas_log_cmd_state(cmnd, "data cmplt err", status); | |
8aac863e GH |
380 | /* error: no data transfered */ |
381 | sdb->resid = sdb->length; | |
382 | } else { | |
383 | sdb->resid = sdb->length - urb->actual_length; | |
384 | } | |
b1d67693 | 385 | uas_try_complete(cmnd, __func__); |
b7b5d11f | 386 | out: |
85fea825 | 387 | usb_free_urb(urb); |
e0648520 | 388 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
389 | } |
390 | ||
876285cc HG |
391 | static void uas_cmd_cmplt(struct urb *urb) |
392 | { | |
b6823c51 HG |
393 | if (urb->status) |
394 | dev_err(&urb->dev->dev, "cmd cmplt err %d\n", urb->status); | |
876285cc | 395 | |
876285cc HG |
396 | usb_free_urb(urb); |
397 | } | |
398 | ||
115bb1ff | 399 | static struct urb *uas_alloc_data_urb(struct uas_dev_info *devinfo, gfp_t gfp, |
b1d67693 GH |
400 | struct scsi_cmnd *cmnd, |
401 | enum dma_data_direction dir) | |
115bb1ff MW |
402 | { |
403 | struct usb_device *udev = devinfo->udev; | |
2d75b9cb | 404 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; |
115bb1ff | 405 | struct urb *urb = usb_alloc_urb(0, gfp); |
b1d67693 GH |
406 | struct scsi_data_buffer *sdb = (dir == DMA_FROM_DEVICE) |
407 | ? scsi_in(cmnd) : scsi_out(cmnd); | |
2d75b9cb HG |
408 | unsigned int pipe = (dir == DMA_FROM_DEVICE) |
409 | ? devinfo->data_in_pipe : devinfo->data_out_pipe; | |
115bb1ff MW |
410 | |
411 | if (!urb) | |
412 | goto out; | |
b1d67693 GH |
413 | usb_fill_bulk_urb(urb, udev, pipe, NULL, sdb->length, |
414 | uas_data_cmplt, cmnd); | |
e28e2f2f HG |
415 | if (devinfo->use_streams) |
416 | urb->stream_id = cmdinfo->uas_tag; | |
115bb1ff MW |
417 | urb->num_sgs = udev->bus->sg_tablesize ? sdb->table.nents : 0; |
418 | urb->sg = sdb->table.sgl; | |
419 | out: | |
420 | return urb; | |
421 | } | |
422 | ||
423 | static struct urb *uas_alloc_sense_urb(struct uas_dev_info *devinfo, gfp_t gfp, | |
2d75b9cb | 424 | struct scsi_cmnd *cmnd) |
115bb1ff MW |
425 | { |
426 | struct usb_device *udev = devinfo->udev; | |
2d75b9cb | 427 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; |
115bb1ff MW |
428 | struct urb *urb = usb_alloc_urb(0, gfp); |
429 | struct sense_iu *iu; | |
430 | ||
431 | if (!urb) | |
432 | goto out; | |
433 | ||
ac563cfd | 434 | iu = kzalloc(sizeof(*iu), gfp); |
115bb1ff MW |
435 | if (!iu) |
436 | goto free; | |
437 | ||
438 | usb_fill_bulk_urb(urb, udev, devinfo->status_pipe, iu, sizeof(*iu), | |
2d75b9cb | 439 | uas_stat_cmplt, cmnd->device->host); |
e28e2f2f HG |
440 | if (devinfo->use_streams) |
441 | urb->stream_id = cmdinfo->uas_tag; | |
115bb1ff MW |
442 | urb->transfer_flags |= URB_FREE_BUFFER; |
443 | out: | |
444 | return urb; | |
445 | free: | |
446 | usb_free_urb(urb); | |
447 | return NULL; | |
448 | } | |
449 | ||
450 | static struct urb *uas_alloc_cmd_urb(struct uas_dev_info *devinfo, gfp_t gfp, | |
a887cd36 | 451 | struct scsi_cmnd *cmnd) |
115bb1ff MW |
452 | { |
453 | struct usb_device *udev = devinfo->udev; | |
454 | struct scsi_device *sdev = cmnd->device; | |
e28e2f2f | 455 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; |
115bb1ff MW |
456 | struct urb *urb = usb_alloc_urb(0, gfp); |
457 | struct command_iu *iu; | |
458 | int len; | |
459 | ||
460 | if (!urb) | |
461 | goto out; | |
462 | ||
463 | len = cmnd->cmd_len - 16; | |
464 | if (len < 0) | |
465 | len = 0; | |
466 | len = ALIGN(len, 4); | |
ac563cfd | 467 | iu = kzalloc(sizeof(*iu) + len, gfp); |
115bb1ff MW |
468 | if (!iu) |
469 | goto free; | |
470 | ||
471 | iu->iu_id = IU_ID_COMMAND; | |
e28e2f2f | 472 | iu->tag = cpu_to_be16(cmdinfo->uas_tag); |
02e031cb | 473 | iu->prio_attr = UAS_SIMPLE_TAG; |
115bb1ff MW |
474 | iu->len = len; |
475 | int_to_scsilun(sdev->lun, &iu->lun); | |
476 | memcpy(iu->cdb, cmnd->cmnd, cmnd->cmd_len); | |
477 | ||
478 | usb_fill_bulk_urb(urb, udev, devinfo->cmd_pipe, iu, sizeof(*iu) + len, | |
b6823c51 | 479 | uas_cmd_cmplt, NULL); |
115bb1ff MW |
480 | urb->transfer_flags |= URB_FREE_BUFFER; |
481 | out: | |
482 | return urb; | |
483 | free: | |
484 | usb_free_urb(urb); | |
485 | return NULL; | |
486 | } | |
487 | ||
488 | /* | |
489 | * Why should I request the Status IU before sending the Command IU? Spec | |
490 | * says to, but also says the device may receive them in any order. Seems | |
491 | * daft to me. | |
492 | */ | |
493 | ||
2d75b9cb | 494 | static struct urb *uas_submit_sense_urb(struct scsi_cmnd *cmnd, gfp_t gfp) |
115bb1ff | 495 | { |
2d75b9cb | 496 | struct uas_dev_info *devinfo = cmnd->device->hostdata; |
e9bd7e1a | 497 | struct urb *urb; |
876285cc | 498 | int err; |
115bb1ff | 499 | |
2d75b9cb | 500 | urb = uas_alloc_sense_urb(devinfo, gfp, cmnd); |
e9bd7e1a | 501 | if (!urb) |
70cf0fba | 502 | return NULL; |
d5f808d3 | 503 | usb_anchor_urb(urb, &devinfo->sense_urbs); |
876285cc HG |
504 | err = usb_submit_urb(urb, gfp); |
505 | if (err) { | |
d5f808d3 | 506 | usb_unanchor_urb(urb); |
1ad7ed5a | 507 | uas_log_cmd_state(cmnd, "sense submit err", err); |
e9bd7e1a | 508 | usb_free_urb(urb); |
70cf0fba | 509 | return NULL; |
115bb1ff | 510 | } |
70cf0fba | 511 | return urb; |
e9bd7e1a GH |
512 | } |
513 | ||
514 | static int uas_submit_urbs(struct scsi_cmnd *cmnd, | |
515 | struct uas_dev_info *devinfo, gfp_t gfp) | |
516 | { | |
517 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
70cf0fba | 518 | struct urb *urb; |
876285cc | 519 | int err; |
115bb1ff | 520 | |
ab945eff | 521 | lockdep_assert_held(&devinfo->lock); |
92a3f767 | 522 | if (cmdinfo->state & SUBMIT_STATUS_URB) { |
2d75b9cb | 523 | urb = uas_submit_sense_urb(cmnd, gfp); |
70cf0fba HG |
524 | if (!urb) |
525 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
92a3f767 | 526 | cmdinfo->state &= ~SUBMIT_STATUS_URB; |
115bb1ff MW |
527 | } |
528 | ||
529 | if (cmdinfo->state & ALLOC_DATA_IN_URB) { | |
530 | cmdinfo->data_in_urb = uas_alloc_data_urb(devinfo, gfp, | |
2d75b9cb | 531 | cmnd, DMA_FROM_DEVICE); |
115bb1ff MW |
532 | if (!cmdinfo->data_in_urb) |
533 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
534 | cmdinfo->state &= ~ALLOC_DATA_IN_URB; | |
535 | } | |
536 | ||
537 | if (cmdinfo->state & SUBMIT_DATA_IN_URB) { | |
d5f808d3 | 538 | usb_anchor_urb(cmdinfo->data_in_urb, &devinfo->data_urbs); |
876285cc HG |
539 | err = usb_submit_urb(cmdinfo->data_in_urb, gfp); |
540 | if (err) { | |
d5f808d3 | 541 | usb_unanchor_urb(cmdinfo->data_in_urb); |
1ad7ed5a | 542 | uas_log_cmd_state(cmnd, "data in submit err", err); |
115bb1ff MW |
543 | return SCSI_MLQUEUE_DEVICE_BUSY; |
544 | } | |
545 | cmdinfo->state &= ~SUBMIT_DATA_IN_URB; | |
b1d67693 | 546 | cmdinfo->state |= DATA_IN_URB_INFLIGHT; |
115bb1ff MW |
547 | } |
548 | ||
549 | if (cmdinfo->state & ALLOC_DATA_OUT_URB) { | |
550 | cmdinfo->data_out_urb = uas_alloc_data_urb(devinfo, gfp, | |
2d75b9cb | 551 | cmnd, DMA_TO_DEVICE); |
115bb1ff MW |
552 | if (!cmdinfo->data_out_urb) |
553 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
554 | cmdinfo->state &= ~ALLOC_DATA_OUT_URB; | |
555 | } | |
556 | ||
557 | if (cmdinfo->state & SUBMIT_DATA_OUT_URB) { | |
d5f808d3 | 558 | usb_anchor_urb(cmdinfo->data_out_urb, &devinfo->data_urbs); |
876285cc HG |
559 | err = usb_submit_urb(cmdinfo->data_out_urb, gfp); |
560 | if (err) { | |
d5f808d3 | 561 | usb_unanchor_urb(cmdinfo->data_out_urb); |
1ad7ed5a | 562 | uas_log_cmd_state(cmnd, "data out submit err", err); |
115bb1ff MW |
563 | return SCSI_MLQUEUE_DEVICE_BUSY; |
564 | } | |
565 | cmdinfo->state &= ~SUBMIT_DATA_OUT_URB; | |
b1d67693 | 566 | cmdinfo->state |= DATA_OUT_URB_INFLIGHT; |
115bb1ff MW |
567 | } |
568 | ||
569 | if (cmdinfo->state & ALLOC_CMD_URB) { | |
a887cd36 | 570 | cmdinfo->cmd_urb = uas_alloc_cmd_urb(devinfo, gfp, cmnd); |
115bb1ff MW |
571 | if (!cmdinfo->cmd_urb) |
572 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
573 | cmdinfo->state &= ~ALLOC_CMD_URB; | |
574 | } | |
575 | ||
576 | if (cmdinfo->state & SUBMIT_CMD_URB) { | |
d5f808d3 | 577 | usb_anchor_urb(cmdinfo->cmd_urb, &devinfo->cmd_urbs); |
876285cc HG |
578 | err = usb_submit_urb(cmdinfo->cmd_urb, gfp); |
579 | if (err) { | |
d5f808d3 | 580 | usb_unanchor_urb(cmdinfo->cmd_urb); |
1ad7ed5a | 581 | uas_log_cmd_state(cmnd, "cmd submit err", err); |
115bb1ff MW |
582 | return SCSI_MLQUEUE_DEVICE_BUSY; |
583 | } | |
a0e39e34 | 584 | cmdinfo->cmd_urb = NULL; |
115bb1ff | 585 | cmdinfo->state &= ~SUBMIT_CMD_URB; |
b1d67693 | 586 | cmdinfo->state |= COMMAND_INFLIGHT; |
115bb1ff MW |
587 | } |
588 | ||
589 | return 0; | |
590 | } | |
591 | ||
f281233d | 592 | static int uas_queuecommand_lck(struct scsi_cmnd *cmnd, |
115bb1ff MW |
593 | void (*done)(struct scsi_cmnd *)) |
594 | { | |
595 | struct scsi_device *sdev = cmnd->device; | |
596 | struct uas_dev_info *devinfo = sdev->hostdata; | |
597 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
e0648520 | 598 | unsigned long flags; |
e28e2f2f | 599 | int idx, err; |
115bb1ff MW |
600 | |
601 | BUILD_BUG_ON(sizeof(struct uas_cmd_info) > sizeof(struct scsi_pointer)); | |
602 | ||
f9dc024a HG |
603 | /* Re-check scsi_block_requests now that we've the host-lock */ |
604 | if (cmnd->device->host->host_self_blocked) | |
605 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
606 | ||
59307852 HG |
607 | if ((devinfo->flags & US_FL_NO_ATA_1X) && |
608 | (cmnd->cmnd[0] == ATA_12 || cmnd->cmnd[0] == ATA_16)) { | |
609 | memcpy(cmnd->sense_buffer, usb_stor_sense_invalidCDB, | |
610 | sizeof(usb_stor_sense_invalidCDB)); | |
611 | cmnd->result = SAM_STAT_CHECK_CONDITION; | |
612 | cmnd->scsi_done(cmnd); | |
613 | return 0; | |
614 | } | |
615 | ||
c6f63207 HG |
616 | spin_lock_irqsave(&devinfo->lock, flags); |
617 | ||
f8be6bfc GH |
618 | if (devinfo->resetting) { |
619 | cmnd->result = DID_ERROR << 16; | |
620 | cmnd->scsi_done(cmnd); | |
c6f63207 | 621 | spin_unlock_irqrestore(&devinfo->lock, flags); |
f8be6bfc GH |
622 | return 0; |
623 | } | |
624 | ||
e28e2f2f HG |
625 | /* Find a free uas-tag */ |
626 | for (idx = 0; idx < devinfo->qdepth; idx++) { | |
627 | if (!devinfo->cmnd[idx]) | |
628 | break; | |
629 | } | |
630 | if (idx == devinfo->qdepth) { | |
e0648520 | 631 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff | 632 | return SCSI_MLQUEUE_DEVICE_BUSY; |
e0648520 | 633 | } |
115bb1ff | 634 | |
115bb1ff MW |
635 | cmnd->scsi_done = done; |
636 | ||
5e61aede | 637 | memset(cmdinfo, 0, sizeof(*cmdinfo)); |
e28e2f2f | 638 | cmdinfo->uas_tag = idx + 1; /* uas-tag == usb-stream-id, so 1 based */ |
e0620001 | 639 | cmdinfo->state = SUBMIT_STATUS_URB | ALLOC_CMD_URB | SUBMIT_CMD_URB; |
115bb1ff MW |
640 | |
641 | switch (cmnd->sc_data_direction) { | |
642 | case DMA_FROM_DEVICE: | |
643 | cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB; | |
644 | break; | |
645 | case DMA_BIDIRECTIONAL: | |
646 | cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB; | |
647 | case DMA_TO_DEVICE: | |
648 | cmdinfo->state |= ALLOC_DATA_OUT_URB | SUBMIT_DATA_OUT_URB; | |
649 | case DMA_NONE: | |
650 | break; | |
651 | } | |
652 | ||
e28e2f2f | 653 | if (!devinfo->use_streams) |
db32de11 | 654 | cmdinfo->state &= ~(SUBMIT_DATA_IN_URB | SUBMIT_DATA_OUT_URB); |
115bb1ff MW |
655 | |
656 | err = uas_submit_urbs(cmnd, devinfo, GFP_ATOMIC); | |
657 | if (err) { | |
658 | /* If we did nothing, give up now */ | |
92a3f767 | 659 | if (cmdinfo->state & SUBMIT_STATUS_URB) { |
e0648520 | 660 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
661 | return SCSI_MLQUEUE_DEVICE_BUSY; |
662 | } | |
1bf8198e | 663 | uas_add_work(cmdinfo); |
115bb1ff MW |
664 | } |
665 | ||
e28e2f2f | 666 | devinfo->cmnd[idx] = cmnd; |
e0648520 | 667 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
668 | return 0; |
669 | } | |
670 | ||
f281233d JG |
671 | static DEF_SCSI_QCMD(uas_queuecommand) |
672 | ||
616f0e6c HG |
673 | /* |
674 | * For now we do not support actually sending an abort to the device, so | |
675 | * this eh always fails. Still we must define it to make sure that we've | |
676 | * dropped all references to the cmnd in question once this function exits. | |
677 | */ | |
678 | static int uas_eh_abort_handler(struct scsi_cmnd *cmnd) | |
115bb1ff | 679 | { |
616f0e6c HG |
680 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; |
681 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; | |
682 | struct urb *data_in_urb = NULL; | |
683 | struct urb *data_out_urb = NULL; | |
e0648520 | 684 | unsigned long flags; |
115bb1ff | 685 | |
e0648520 | 686 | spin_lock_irqsave(&devinfo->lock, flags); |
b83b86a3 | 687 | |
1ad7ed5a | 688 | uas_log_cmd_state(cmnd, __func__, 0); |
c6f63207 | 689 | |
616f0e6c HG |
690 | /* Ensure that try_complete does not call scsi_done */ |
691 | cmdinfo->state |= COMMAND_ABORTED; | |
b83b86a3 | 692 | |
616f0e6c | 693 | /* Drop all refs to this cmnd, kill data urbs to break their ref */ |
e28e2f2f | 694 | devinfo->cmnd[cmdinfo->uas_tag - 1] = NULL; |
616f0e6c HG |
695 | if (cmdinfo->state & DATA_IN_URB_INFLIGHT) |
696 | data_in_urb = usb_get_urb(cmdinfo->data_in_urb); | |
697 | if (cmdinfo->state & DATA_OUT_URB_INFLIGHT) | |
698 | data_out_urb = usb_get_urb(cmdinfo->data_out_urb); | |
e0648520 | 699 | |
4c5481ef | 700 | uas_free_unsubmitted_urbs(cmnd); |
b83b86a3 | 701 | |
b83b86a3 HG |
702 | spin_unlock_irqrestore(&devinfo->lock, flags); |
703 | ||
616f0e6c HG |
704 | if (data_in_urb) { |
705 | usb_kill_urb(data_in_urb); | |
706 | usb_put_urb(data_in_urb); | |
c6f63207 | 707 | } |
616f0e6c HG |
708 | if (data_out_urb) { |
709 | usb_kill_urb(data_out_urb); | |
710 | usb_put_urb(data_out_urb); | |
5d390403 | 711 | } |
115bb1ff | 712 | |
616f0e6c | 713 | return FAILED; |
115bb1ff MW |
714 | } |
715 | ||
716 | static int uas_eh_bus_reset_handler(struct scsi_cmnd *cmnd) | |
717 | { | |
718 | struct scsi_device *sdev = cmnd->device; | |
719 | struct uas_dev_info *devinfo = sdev->hostdata; | |
720 | struct usb_device *udev = devinfo->udev; | |
b7b5d11f | 721 | unsigned long flags; |
023b515e | 722 | int err; |
115bb1ff | 723 | |
be326f4c HG |
724 | err = usb_lock_device_for_reset(udev, devinfo->intf); |
725 | if (err) { | |
726 | shost_printk(KERN_ERR, sdev->host, | |
727 | "%s FAILED to get lock err %d\n", __func__, err); | |
728 | return FAILED; | |
729 | } | |
730 | ||
326349f8 | 731 | shost_printk(KERN_INFO, sdev->host, "%s start\n", __func__); |
b7b5d11f HG |
732 | |
733 | spin_lock_irqsave(&devinfo->lock, flags); | |
023b515e | 734 | devinfo->resetting = 1; |
b7b5d11f HG |
735 | spin_unlock_irqrestore(&devinfo->lock, flags); |
736 | ||
a0e39e34 | 737 | usb_kill_anchored_urbs(&devinfo->cmd_urbs); |
023b515e GH |
738 | usb_kill_anchored_urbs(&devinfo->sense_urbs); |
739 | usb_kill_anchored_urbs(&devinfo->data_urbs); | |
1589349f HG |
740 | uas_zap_pending(devinfo, DID_RESET); |
741 | ||
023b515e | 742 | err = usb_reset_device(udev); |
b7b5d11f HG |
743 | |
744 | spin_lock_irqsave(&devinfo->lock, flags); | |
023b515e | 745 | devinfo->resetting = 0; |
b7b5d11f | 746 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff | 747 | |
be326f4c HG |
748 | usb_unlock_device(udev); |
749 | ||
023b515e | 750 | if (err) { |
ce39fe6f HG |
751 | shost_printk(KERN_INFO, sdev->host, "%s FAILED err %d\n", |
752 | __func__, err); | |
023b515e GH |
753 | return FAILED; |
754 | } | |
115bb1ff | 755 | |
023b515e GH |
756 | shost_printk(KERN_INFO, sdev->host, "%s success\n", __func__); |
757 | return SUCCESS; | |
115bb1ff MW |
758 | } |
759 | ||
760 | static int uas_slave_alloc(struct scsi_device *sdev) | |
761 | { | |
ee136af4 HG |
762 | struct uas_dev_info *devinfo = |
763 | (struct uas_dev_info *)sdev->host->hostdata; | |
764 | ||
765 | sdev->hostdata = devinfo; | |
37599f96 HG |
766 | |
767 | /* USB has unusual DMA-alignment requirements: Although the | |
768 | * starting address of each scatter-gather element doesn't matter, | |
769 | * the length of each element except the last must be divisible | |
770 | * by the Bulk maxpacket value. There's currently no way to | |
771 | * express this by block-layer constraints, so we'll cop out | |
772 | * and simply require addresses to be aligned at 512-byte | |
773 | * boundaries. This is okay since most block I/O involves | |
774 | * hardware sectors that are multiples of 512 bytes in length, | |
775 | * and since host controllers up through USB 2.0 have maxpacket | |
776 | * values no larger than 512. | |
777 | * | |
778 | * But it doesn't suffice for Wireless USB, where Bulk maxpacket | |
779 | * values can be as large as 2048. To make that work properly | |
780 | * will require changes to the block layer. | |
781 | */ | |
782 | blk_queue_update_dma_alignment(sdev->request_queue, (512 - 1)); | |
783 | ||
ee136af4 HG |
784 | if (devinfo->flags & US_FL_MAX_SECTORS_64) |
785 | blk_queue_max_hw_sectors(sdev->request_queue, 64); | |
786 | else if (devinfo->flags & US_FL_MAX_SECTORS_240) | |
787 | blk_queue_max_hw_sectors(sdev->request_queue, 240); | |
788 | ||
115bb1ff MW |
789 | return 0; |
790 | } | |
791 | ||
792 | static int uas_slave_configure(struct scsi_device *sdev) | |
793 | { | |
794 | struct uas_dev_info *devinfo = sdev->hostdata; | |
734016b0 HG |
795 | |
796 | if (devinfo->flags & US_FL_NO_REPORT_OPCODES) | |
797 | sdev->no_report_opcodes = 1; | |
798 | ||
db5ed4df | 799 | scsi_change_queue_depth(sdev, devinfo->qdepth - 2); |
115bb1ff MW |
800 | return 0; |
801 | } | |
802 | ||
803 | static struct scsi_host_template uas_host_template = { | |
804 | .module = THIS_MODULE, | |
805 | .name = "uas", | |
806 | .queuecommand = uas_queuecommand, | |
807 | .slave_alloc = uas_slave_alloc, | |
808 | .slave_configure = uas_slave_configure, | |
809 | .eh_abort_handler = uas_eh_abort_handler, | |
115bb1ff MW |
810 | .eh_bus_reset_handler = uas_eh_bus_reset_handler, |
811 | .can_queue = 65536, /* Is there a limit on the _host_ ? */ | |
812 | .this_id = -1, | |
813 | .sg_tablesize = SG_NONE, | |
115bb1ff | 814 | .skip_settle_delay = 1, |
115bb1ff MW |
815 | }; |
816 | ||
79b4c061 HG |
817 | #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \ |
818 | vendorName, productName, useProtocol, useTransport, \ | |
819 | initFunction, flags) \ | |
820 | { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \ | |
821 | .driver_info = (flags) } | |
822 | ||
115bb1ff | 823 | static struct usb_device_id uas_usb_ids[] = { |
79b4c061 | 824 | # include "unusual_uas.h" |
115bb1ff MW |
825 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_BULK) }, |
826 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_UAS) }, | |
115bb1ff MW |
827 | { } |
828 | }; | |
829 | MODULE_DEVICE_TABLE(usb, uas_usb_ids); | |
830 | ||
79b4c061 HG |
831 | #undef UNUSUAL_DEV |
832 | ||
e1be067b HG |
833 | static int uas_switch_interface(struct usb_device *udev, |
834 | struct usb_interface *intf) | |
835 | { | |
836 | int alt; | |
837 | ||
838 | alt = uas_find_uas_alt_setting(intf); | |
839 | if (alt < 0) | |
840 | return alt; | |
841 | ||
842 | return usb_set_interface(udev, | |
843 | intf->altsetting[0].desc.bInterfaceNumber, alt); | |
844 | } | |
845 | ||
58d51444 | 846 | static int uas_configure_endpoints(struct uas_dev_info *devinfo) |
34f11e59 HG |
847 | { |
848 | struct usb_host_endpoint *eps[4] = { }; | |
849 | struct usb_device *udev = devinfo->udev; | |
850 | int r; | |
851 | ||
34f11e59 | 852 | r = uas_find_endpoints(devinfo->intf->cur_altsetting, eps); |
74d71aec HG |
853 | if (r) |
854 | return r; | |
855 | ||
856 | devinfo->cmd_pipe = usb_sndbulkpipe(udev, | |
857 | usb_endpoint_num(&eps[0]->desc)); | |
858 | devinfo->status_pipe = usb_rcvbulkpipe(udev, | |
859 | usb_endpoint_num(&eps[1]->desc)); | |
860 | devinfo->data_in_pipe = usb_rcvbulkpipe(udev, | |
861 | usb_endpoint_num(&eps[2]->desc)); | |
862 | devinfo->data_out_pipe = usb_sndbulkpipe(udev, | |
863 | usb_endpoint_num(&eps[3]->desc)); | |
115bb1ff | 864 | |
e5e55819 | 865 | if (udev->speed < USB_SPEED_SUPER) { |
e2875c33 | 866 | devinfo->qdepth = 32; |
115bb1ff MW |
867 | devinfo->use_streams = 0; |
868 | } else { | |
58d51444 | 869 | devinfo->qdepth = usb_alloc_streams(devinfo->intf, eps + 1, |
5e61aede | 870 | 3, MAX_CMNDS, GFP_NOIO); |
58d51444 HG |
871 | if (devinfo->qdepth < 0) |
872 | return devinfo->qdepth; | |
115bb1ff MW |
873 | devinfo->use_streams = 1; |
874 | } | |
58d51444 HG |
875 | |
876 | return 0; | |
115bb1ff MW |
877 | } |
878 | ||
dae51546 SAS |
879 | static void uas_free_streams(struct uas_dev_info *devinfo) |
880 | { | |
881 | struct usb_device *udev = devinfo->udev; | |
882 | struct usb_host_endpoint *eps[3]; | |
883 | ||
884 | eps[0] = usb_pipe_endpoint(udev, devinfo->status_pipe); | |
885 | eps[1] = usb_pipe_endpoint(udev, devinfo->data_in_pipe); | |
886 | eps[2] = usb_pipe_endpoint(udev, devinfo->data_out_pipe); | |
94d72f00 | 887 | usb_free_streams(devinfo->intf, eps, 3, GFP_NOIO); |
dae51546 SAS |
888 | } |
889 | ||
115bb1ff MW |
890 | static int uas_probe(struct usb_interface *intf, const struct usb_device_id *id) |
891 | { | |
6ce8213b HG |
892 | int result = -ENOMEM; |
893 | struct Scsi_Host *shost = NULL; | |
115bb1ff MW |
894 | struct uas_dev_info *devinfo; |
895 | struct usb_device *udev = interface_to_usbdev(intf); | |
a5011d44 | 896 | unsigned long dev_flags; |
115bb1ff | 897 | |
a5011d44 | 898 | if (!uas_use_uas_driver(intf, id, &dev_flags)) |
79b4c061 HG |
899 | return -ENODEV; |
900 | ||
89dc2905 MW |
901 | if (uas_switch_interface(udev, intf)) |
902 | return -ENODEV; | |
115bb1ff | 903 | |
21fc05b6 HG |
904 | shost = scsi_host_alloc(&uas_host_template, |
905 | sizeof(struct uas_dev_info)); | |
115bb1ff | 906 | if (!shost) |
6ce8213b | 907 | goto set_alt0; |
115bb1ff MW |
908 | |
909 | shost->max_cmd_len = 16 + 252; | |
910 | shost->max_id = 1; | |
bde027b4 GH |
911 | shost->max_lun = 256; |
912 | shost->max_channel = 0; | |
115bb1ff MW |
913 | shost->sg_tablesize = udev->bus->sg_tablesize; |
914 | ||
21fc05b6 | 915 | devinfo = (struct uas_dev_info *)shost->hostdata; |
115bb1ff MW |
916 | devinfo->intf = intf; |
917 | devinfo->udev = udev; | |
023b515e | 918 | devinfo->resetting = 0; |
da65c2bb | 919 | devinfo->shutdown = 0; |
a5011d44 | 920 | devinfo->flags = dev_flags; |
a0e39e34 | 921 | init_usb_anchor(&devinfo->cmd_urbs); |
bdd000fb GH |
922 | init_usb_anchor(&devinfo->sense_urbs); |
923 | init_usb_anchor(&devinfo->data_urbs); | |
e0648520 | 924 | spin_lock_init(&devinfo->lock); |
1bf8198e | 925 | INIT_WORK(&devinfo->work, uas_do_work); |
58d51444 HG |
926 | |
927 | result = uas_configure_endpoints(devinfo); | |
928 | if (result) | |
929 | goto set_alt0; | |
115bb1ff | 930 | |
c637f1fa | 931 | usb_set_intfdata(intf, shost); |
dae51546 SAS |
932 | result = scsi_add_host(shost, &intf->dev); |
933 | if (result) | |
6ce8213b | 934 | goto free_streams; |
dae51546 | 935 | |
115bb1ff | 936 | scsi_scan_host(shost); |
115bb1ff | 937 | return result; |
dae51546 | 938 | |
6ce8213b | 939 | free_streams: |
dae51546 | 940 | uas_free_streams(devinfo); |
c637f1fa | 941 | usb_set_intfdata(intf, NULL); |
6ce8213b HG |
942 | set_alt0: |
943 | usb_set_interface(udev, intf->altsetting[0].desc.bInterfaceNumber, 0); | |
115bb1ff MW |
944 | if (shost) |
945 | scsi_host_put(shost); | |
946 | return result; | |
947 | } | |
948 | ||
f9dc024a HG |
949 | static int uas_cmnd_list_empty(struct uas_dev_info *devinfo) |
950 | { | |
951 | unsigned long flags; | |
952 | int i, r = 1; | |
953 | ||
954 | spin_lock_irqsave(&devinfo->lock, flags); | |
955 | ||
956 | for (i = 0; i < devinfo->qdepth; i++) { | |
957 | if (devinfo->cmnd[i]) { | |
958 | r = 0; /* Not empty */ | |
959 | break; | |
960 | } | |
961 | } | |
962 | ||
963 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
964 | ||
965 | return r; | |
966 | } | |
967 | ||
968 | /* | |
969 | * Wait for any pending cmnds to complete, on usb-2 sense_urbs may temporarily | |
970 | * get empty while there still is more work to do due to sense-urbs completing | |
971 | * with a READ/WRITE_READY iu code, so keep waiting until the list gets empty. | |
972 | */ | |
973 | static int uas_wait_for_pending_cmnds(struct uas_dev_info *devinfo) | |
974 | { | |
975 | unsigned long start_time; | |
976 | int r; | |
977 | ||
978 | start_time = jiffies; | |
979 | do { | |
980 | flush_work(&devinfo->work); | |
981 | ||
982 | r = usb_wait_anchor_empty_timeout(&devinfo->sense_urbs, 5000); | |
983 | if (r == 0) | |
984 | return -ETIME; | |
985 | ||
986 | r = usb_wait_anchor_empty_timeout(&devinfo->data_urbs, 500); | |
987 | if (r == 0) | |
988 | return -ETIME; | |
989 | ||
990 | if (time_after(jiffies, start_time + 5 * HZ)) | |
991 | return -ETIME; | |
992 | } while (!uas_cmnd_list_empty(devinfo)); | |
993 | ||
994 | return 0; | |
995 | } | |
996 | ||
115bb1ff MW |
997 | static int uas_pre_reset(struct usb_interface *intf) |
998 | { | |
4de7a373 | 999 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
21fc05b6 | 1000 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
4de7a373 HG |
1001 | unsigned long flags; |
1002 | ||
da65c2bb HG |
1003 | if (devinfo->shutdown) |
1004 | return 0; | |
1005 | ||
4de7a373 HG |
1006 | /* Block new requests */ |
1007 | spin_lock_irqsave(shost->host_lock, flags); | |
1008 | scsi_block_requests(shost); | |
1009 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1010 | ||
f9dc024a | 1011 | if (uas_wait_for_pending_cmnds(devinfo) != 0) { |
4de7a373 | 1012 | shost_printk(KERN_ERR, shost, "%s: timed out\n", __func__); |
f9dc024a | 1013 | scsi_unblock_requests(shost); |
4de7a373 HG |
1014 | return 1; |
1015 | } | |
1016 | ||
1017 | uas_free_streams(devinfo); | |
1018 | ||
115bb1ff MW |
1019 | return 0; |
1020 | } | |
1021 | ||
1022 | static int uas_post_reset(struct usb_interface *intf) | |
1023 | { | |
4de7a373 | 1024 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
21fc05b6 | 1025 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
4de7a373 | 1026 | unsigned long flags; |
ce39fe6f | 1027 | int err; |
4de7a373 | 1028 | |
da65c2bb HG |
1029 | if (devinfo->shutdown) |
1030 | return 0; | |
1031 | ||
ce39fe6f HG |
1032 | err = uas_configure_endpoints(devinfo); |
1033 | if (err) { | |
58d51444 | 1034 | shost_printk(KERN_ERR, shost, |
ce39fe6f HG |
1035 | "%s: alloc streams error %d after reset", |
1036 | __func__, err); | |
58d51444 HG |
1037 | return 1; |
1038 | } | |
4de7a373 HG |
1039 | |
1040 | spin_lock_irqsave(shost->host_lock, flags); | |
1041 | scsi_report_bus_reset(shost, 0); | |
1042 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1043 | ||
1044 | scsi_unblock_requests(shost); | |
1045 | ||
115bb1ff MW |
1046 | return 0; |
1047 | } | |
1048 | ||
0df1f663 HG |
1049 | static int uas_suspend(struct usb_interface *intf, pm_message_t message) |
1050 | { | |
1051 | struct Scsi_Host *shost = usb_get_intfdata(intf); | |
21fc05b6 | 1052 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
0df1f663 | 1053 | |
f9dc024a | 1054 | if (uas_wait_for_pending_cmnds(devinfo) != 0) { |
0df1f663 HG |
1055 | shost_printk(KERN_ERR, shost, "%s: timed out\n", __func__); |
1056 | return -ETIME; | |
1057 | } | |
1058 | ||
1059 | return 0; | |
1060 | } | |
1061 | ||
1062 | static int uas_resume(struct usb_interface *intf) | |
1063 | { | |
1064 | return 0; | |
1065 | } | |
1066 | ||
1067 | static int uas_reset_resume(struct usb_interface *intf) | |
1068 | { | |
1069 | struct Scsi_Host *shost = usb_get_intfdata(intf); | |
21fc05b6 | 1070 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
0df1f663 | 1071 | unsigned long flags; |
ce39fe6f | 1072 | int err; |
0df1f663 | 1073 | |
ce39fe6f HG |
1074 | err = uas_configure_endpoints(devinfo); |
1075 | if (err) { | |
0df1f663 | 1076 | shost_printk(KERN_ERR, shost, |
ce39fe6f HG |
1077 | "%s: alloc streams error %d after reset", |
1078 | __func__, err); | |
0df1f663 HG |
1079 | return -EIO; |
1080 | } | |
1081 | ||
1082 | spin_lock_irqsave(shost->host_lock, flags); | |
1083 | scsi_report_bus_reset(shost, 0); | |
1084 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1085 | ||
1086 | return 0; | |
1087 | } | |
1088 | ||
115bb1ff MW |
1089 | static void uas_disconnect(struct usb_interface *intf) |
1090 | { | |
115bb1ff | 1091 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
21fc05b6 | 1092 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
b7b5d11f | 1093 | unsigned long flags; |
115bb1ff | 1094 | |
b7b5d11f | 1095 | spin_lock_irqsave(&devinfo->lock, flags); |
4c456971 | 1096 | devinfo->resetting = 1; |
b7b5d11f HG |
1097 | spin_unlock_irqrestore(&devinfo->lock, flags); |
1098 | ||
1bf8198e | 1099 | cancel_work_sync(&devinfo->work); |
a0e39e34 | 1100 | usb_kill_anchored_urbs(&devinfo->cmd_urbs); |
bdd000fb GH |
1101 | usb_kill_anchored_urbs(&devinfo->sense_urbs); |
1102 | usb_kill_anchored_urbs(&devinfo->data_urbs); | |
1589349f HG |
1103 | uas_zap_pending(devinfo, DID_NO_CONNECT); |
1104 | ||
4c456971 | 1105 | scsi_remove_host(shost); |
dae51546 | 1106 | uas_free_streams(devinfo); |
21fc05b6 | 1107 | scsi_host_put(shost); |
115bb1ff MW |
1108 | } |
1109 | ||
da65c2bb HG |
1110 | /* |
1111 | * Put the device back in usb-storage mode on shutdown, as some BIOS-es | |
1112 | * hang on reboot when the device is still in uas mode. Note the reset is | |
1113 | * necessary as some devices won't revert to usb-storage mode without it. | |
1114 | */ | |
1115 | static void uas_shutdown(struct device *dev) | |
1116 | { | |
1117 | struct usb_interface *intf = to_usb_interface(dev); | |
1118 | struct usb_device *udev = interface_to_usbdev(intf); | |
1119 | struct Scsi_Host *shost = usb_get_intfdata(intf); | |
21fc05b6 | 1120 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
da65c2bb HG |
1121 | |
1122 | if (system_state != SYSTEM_RESTART) | |
1123 | return; | |
1124 | ||
1125 | devinfo->shutdown = 1; | |
1126 | uas_free_streams(devinfo); | |
1127 | usb_set_interface(udev, intf->altsetting[0].desc.bInterfaceNumber, 0); | |
1128 | usb_reset_device(udev); | |
1129 | } | |
1130 | ||
115bb1ff MW |
1131 | static struct usb_driver uas_driver = { |
1132 | .name = "uas", | |
1133 | .probe = uas_probe, | |
1134 | .disconnect = uas_disconnect, | |
1135 | .pre_reset = uas_pre_reset, | |
1136 | .post_reset = uas_post_reset, | |
0df1f663 HG |
1137 | .suspend = uas_suspend, |
1138 | .resume = uas_resume, | |
1139 | .reset_resume = uas_reset_resume, | |
da65c2bb | 1140 | .drvwrap.driver.shutdown = uas_shutdown, |
115bb1ff MW |
1141 | .id_table = uas_usb_ids, |
1142 | }; | |
1143 | ||
65db4305 | 1144 | module_usb_driver(uas_driver); |
115bb1ff MW |
1145 | |
1146 | MODULE_LICENSE("GPL"); | |
f50a4968 HG |
1147 | MODULE_AUTHOR( |
1148 | "Hans de Goede <hdegoede@redhat.com>, Matthew Wilcox and Sarah Sharp"); |