projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
uas: Fix uas not working when plugged into an ehci port
[linux-2.6-block.git] / drivers / usb / storage / uas.c
CommitLineData
115bb1ff
MW		 1/*
2 * USB Attached SCSI
3 * Note that this is not the same as the USB Mass Storage driver
4 *
5 * Copyright Matthew Wilcox for Intel Corp, 2010
6 * Copyright Sarah Sharp for Intel Corp, 2010
7 *
8 * Distributed under the terms of the GNU GPL, version two.
9 */
10
11#include <linux/blkdev.h>
12#include <linux/slab.h>
13#include <linux/types.h>
6eb0de82 14#include <linux/module.h>
115bb1ff 15#include <linux/usb.h>
c898add5 16#include <linux/usb/hcd.h>
115bb1ff 17#include <linux/usb/storage.h>
348748b0 18#include <linux/usb/uas.h>
115bb1ff
MW		 19
20#include <scsi/scsi.h>
21#include <scsi/scsi_dbg.h>
22#include <scsi/scsi_cmnd.h>
23#include <scsi/scsi_device.h>
24#include <scsi/scsi_host.h>
25#include <scsi/scsi_tcq.h>
26
115bb1ff
MW		 27/*
28 * The r00-r01c specs define this version of the SENSE IU data structure.
29 * It's still in use by several different firmware releases.
30 */
31struct sense_iu_old {
32 __u8 iu_id;
33 __u8 rsvd1;
34 __be16 tag;
35 __be16 len;
36 __u8 status;
37 __u8 service_response;
38 __u8 sense[SCSI_SENSE_BUFFERSIZE];
39};
40
115bb1ff
MW		 41struct uas_dev_info {
42 struct usb_interface *intf;
43 struct usb_device *udev;
a0e39e34 44 struct usb_anchor cmd_urbs;
bdd000fb
GH		 45 struct usb_anchor sense_urbs;
46 struct usb_anchor data_urbs;
023b515e
GH		 47 int qdepth, resetting;
48 struct response_ui response;
115bb1ff
MW		 49 unsigned cmd_pipe, status_pipe, data_in_pipe, data_out_pipe;
50 unsigned use_streams:1;
51 unsigned uas_sense_old:1;
22188f4a 52 struct scsi_cmnd *cmnd;
e0648520 53 spinlock_t lock;
1bf8198e
GH		 54 struct work_struct work;
55 struct list_head work_list;
326349f8 56 struct list_head dead_list;
115bb1ff
MW		 57};
58
59enum {
92a3f767 60 SUBMIT_STATUS_URB = (1 << 1),
115bb1ff
MW		 61 ALLOC_DATA_IN_URB = (1 << 2),
62 SUBMIT_DATA_IN_URB = (1 << 3),
63 ALLOC_DATA_OUT_URB = (1 << 4),
64 SUBMIT_DATA_OUT_URB = (1 << 5),
65 ALLOC_CMD_URB = (1 << 6),
66 SUBMIT_CMD_URB = (1 << 7),
b1d67693
GH		 67 COMMAND_INFLIGHT = (1 << 8),
68 DATA_IN_URB_INFLIGHT = (1 << 9),
69 DATA_OUT_URB_INFLIGHT = (1 << 10),
70 COMMAND_COMPLETED = (1 << 11),
ef018cc9 71 COMMAND_ABORTED = (1 << 12),
b06e48af 72 UNLINK_DATA_URBS = (1 << 13),
efefecf3 73 IS_IN_WORK_LIST = (1 << 14),
115bb1ff
MW		 74};
75
76/* Overrides scsi_pointer */
77struct uas_cmd_info {
78 unsigned int state;
79 unsigned int stream;
80 struct urb *cmd_urb;
115bb1ff
MW		 81 struct urb *data_in_urb;
82 struct urb *data_out_urb;
1bf8198e 83 struct list_head work;
326349f8 84 struct list_head dead;
115bb1ff
MW		 85};
86
87/* I hate forward declarations, but I actually have a loop */
88static int uas_submit_urbs(struct scsi_cmnd *cmnd,
89 struct uas_dev_info *devinfo, gfp_t gfp);
ea9da1c7 90static void uas_do_work(struct work_struct *work);
4c456971 91static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller);
d89bd835
GH		 92static void uas_configure_endpoints(struct uas_dev_info *devinfo);
93static void uas_free_streams(struct uas_dev_info *devinfo);
326349f8 94static void uas_log_cmd_state(struct scsi_cmnd *cmnd, const char *caller);
115bb1ff 95
7e50e0be 96/* Must be called with devinfo->lock held, will temporary unlock the lock */
aa8f6123 97static void uas_unlink_data_urbs(struct uas_dev_info *devinfo,
7e50e0be
HG		 98 struct uas_cmd_info *cmdinfo,
99 unsigned long *lock_flags)
aa8f6123 100{
b06e48af
GH		 101 /*
102 * The UNLINK_DATA_URBS flag makes sure uas_try_complete
103 * (called by urb completion) doesn't release cmdinfo
104 * underneath us.
105 */
b06e48af 106 cmdinfo->state |= UNLINK_DATA_URBS;
7e50e0be 107 spin_unlock_irqrestore(&devinfo->lock, *lock_flags);
b06e48af 108
aa8f6123
GH		 109 if (cmdinfo->data_in_urb)
110 usb_unlink_urb(cmdinfo->data_in_urb);
111 if (cmdinfo->data_out_urb)
112 usb_unlink_urb(cmdinfo->data_out_urb);
b06e48af 113
7e50e0be 114 spin_lock_irqsave(&devinfo->lock, *lock_flags);
b06e48af 115 cmdinfo->state &= ~UNLINK_DATA_URBS;
aa8f6123
GH		 116}
117
115bb1ff
MW		 118static void uas_do_work(struct work_struct *work)
119{
1bf8198e
GH		 120 struct uas_dev_info *devinfo =
121 container_of(work, struct uas_dev_info, work);
115bb1ff 122 struct uas_cmd_info *cmdinfo;
ea9da1c7 123 struct uas_cmd_info *temp;
e0648520 124 unsigned long flags;
ea9da1c7 125 int err;
115bb1ff 126
1bf8198e
GH		 127 spin_lock_irqsave(&devinfo->lock, flags);
128 list_for_each_entry_safe(cmdinfo, temp, &devinfo->work_list, work) {
115bb1ff 129 struct scsi_pointer *scp = (void *)cmdinfo;
1bf8198e
GH		 130 struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd,
131 SCp);
e0648520 132 err = uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_ATOMIC);
1bf8198e 133 if (!err) {
efefecf3 134 cmdinfo->state &= ~IS_IN_WORK_LIST;
1bf8198e
GH		 135 list_del(&cmdinfo->work);
136 } else {
137 schedule_work(&devinfo->work);
ea9da1c7 138 }
115bb1ff 139 }
1bf8198e 140 spin_unlock_irqrestore(&devinfo->lock, flags);
115bb1ff
MW		 141}
142
4c456971
GH		 143static void uas_abort_work(struct uas_dev_info *devinfo)
144{
145 struct uas_cmd_info *cmdinfo;
146 struct uas_cmd_info *temp;
4c456971
GH		 147 unsigned long flags;
148
4c456971 149 spin_lock_irqsave(&devinfo->lock, flags);
1bf8198e 150 list_for_each_entry_safe(cmdinfo, temp, &devinfo->work_list, work) {
4c456971 151 struct scsi_pointer *scp = (void *)cmdinfo;
1bf8198e
GH		 152 struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd,
153 SCp);
326349f8 154 uas_log_cmd_state(cmnd, __func__);
f491ecbb 155 WARN_ON_ONCE(cmdinfo->state & COMMAND_ABORTED);
1bf8198e
GH		 156 cmdinfo->state |= COMMAND_ABORTED;
157 cmdinfo->state &= ~IS_IN_WORK_LIST;
1bf8198e 158 list_del(&cmdinfo->work);
326349f8 159 list_add_tail(&cmdinfo->dead, &devinfo->dead_list);
4c456971
GH		 160 }
161 spin_unlock_irqrestore(&devinfo->lock, flags);
162}
163
1bf8198e
GH		 164static void uas_add_work(struct uas_cmd_info *cmdinfo)
165{
166 struct scsi_pointer *scp = (void *)cmdinfo;
167 struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, SCp);
168 struct uas_dev_info *devinfo = cmnd->device->hostdata;
169
f491ecbb 170 WARN_ON_ONCE(!spin_is_locked(&devinfo->lock));
1bf8198e
GH		 171 list_add_tail(&cmdinfo->work, &devinfo->work_list);
172 cmdinfo->state |= IS_IN_WORK_LIST;
173 schedule_work(&devinfo->work);
174}
175
326349f8
GH		 176static void uas_zap_dead(struct uas_dev_info *devinfo)
177{
178 struct uas_cmd_info *cmdinfo;
179 struct uas_cmd_info *temp;
180 unsigned long flags;
181
182 spin_lock_irqsave(&devinfo->lock, flags);
183 list_for_each_entry_safe(cmdinfo, temp, &devinfo->dead_list, dead) {
184 struct scsi_pointer *scp = (void *)cmdinfo;
185 struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd,
186 SCp);
187 uas_log_cmd_state(cmnd, __func__);
f491ecbb 188 WARN_ON_ONCE(!(cmdinfo->state & COMMAND_ABORTED));
326349f8
GH		 189 /* all urbs are killed, clear inflight bits */
190 cmdinfo->state &= ~(COMMAND_INFLIGHT |
191 DATA_IN_URB_INFLIGHT |
192 DATA_OUT_URB_INFLIGHT);
193 uas_try_complete(cmnd, __func__);
194 }
195 spin_unlock_irqrestore(&devinfo->lock, flags);
196}
197
115bb1ff
MW		 198static void uas_sense(struct urb *urb, struct scsi_cmnd *cmnd)
199{
200 struct sense_iu *sense_iu = urb->transfer_buffer;
201 struct scsi_device *sdev = cmnd->device;
202
203 if (urb->actual_length > 16) {
204 unsigned len = be16_to_cpup(&sense_iu->len);
205 if (len + 16 != urb->actual_length) {
206 int newlen = min(len + 16, urb->actual_length) - 16;
207 if (newlen < 0)
208 newlen = 0;
209 sdev_printk(KERN_INFO, sdev, "%s: urb length %d "
210 "disagrees with IU sense data length %d, "
211 "using %d bytes of sense data\n", __func__,
212 urb->actual_length, len, newlen);
213 len = newlen;
214 }
215 memcpy(cmnd->sense_buffer, sense_iu->sense, len);
216 }
217
218 cmnd->result = sense_iu->status;
115bb1ff
MW		 219}
220
221static void uas_sense_old(struct urb *urb, struct scsi_cmnd *cmnd)
222{
223 struct sense_iu_old *sense_iu = urb->transfer_buffer;
224 struct scsi_device *sdev = cmnd->device;
225
226 if (urb->actual_length > 8) {
227 unsigned len = be16_to_cpup(&sense_iu->len) - 2;
228 if (len + 8 != urb->actual_length) {
229 int newlen = min(len + 8, urb->actual_length) - 8;
230 if (newlen < 0)
231 newlen = 0;
232 sdev_printk(KERN_INFO, sdev, "%s: urb length %d "
233 "disagrees with IU sense data length %d, "
234 "using %d bytes of sense data\n", __func__,
235 urb->actual_length, len, newlen);
236 len = newlen;
237 }
238 memcpy(cmnd->sense_buffer, sense_iu->sense, len);
239 }
240
241 cmnd->result = sense_iu->status;
b1d67693
GH		 242}
243
244static void uas_log_cmd_state(struct scsi_cmnd *cmnd, const char *caller)
245{
246 struct uas_cmd_info *ci = (void *)&cmnd->SCp;
247
248 scmd_printk(KERN_INFO, cmnd, "%s %p tag %d, inflight:"
efefecf3 249 "%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
b1d67693
GH		 250 caller, cmnd, cmnd->request->tag,
251 (ci->state & SUBMIT_STATUS_URB) ? " s-st" : "",
252 (ci->state & ALLOC_DATA_IN_URB) ? " a-in" : "",
253 (ci->state & SUBMIT_DATA_IN_URB) ? " s-in" : "",
254 (ci->state & ALLOC_DATA_OUT_URB) ? " a-out" : "",
255 (ci->state & SUBMIT_DATA_OUT_URB) ? " s-out" : "",
256 (ci->state & ALLOC_CMD_URB) ? " a-cmd" : "",
257 (ci->state & SUBMIT_CMD_URB) ? " s-cmd" : "",
258 (ci->state & COMMAND_INFLIGHT) ? " CMD" : "",
259 (ci->state & DATA_IN_URB_INFLIGHT) ? " IN" : "",
260 (ci->state & DATA_OUT_URB_INFLIGHT) ? " OUT" : "",
ef018cc9 261 (ci->state & COMMAND_COMPLETED) ? " done" : "",
b06e48af 262 (ci->state & COMMAND_ABORTED) ? " abort" : "",
efefecf3
GH		 263 (ci->state & UNLINK_DATA_URBS) ? " unlink": "",
264 (ci->state & IS_IN_WORK_LIST) ? " work" : "");
b1d67693
GH		 265}
266
267static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller)
268{
269 struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp;
e0648520 270 struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata;
b1d67693 271
f491ecbb 272 WARN_ON_ONCE(!spin_is_locked(&devinfo->lock));
b1d67693
GH		 273 if (cmdinfo->state & (COMMAND_INFLIGHT |
274 DATA_IN_URB_INFLIGHT |
b06e48af
GH		 275 DATA_OUT_URB_INFLIGHT |
276 UNLINK_DATA_URBS))
b1d67693 277 return -EBUSY;
f491ecbb 278 WARN_ON_ONCE(cmdinfo->state & COMMAND_COMPLETED);
b1d67693
GH		 279 cmdinfo->state |= COMMAND_COMPLETED;
280 usb_free_urb(cmdinfo->data_in_urb);
281 usb_free_urb(cmdinfo->data_out_urb);
0871d7d8
GH		 282 if (cmdinfo->state & COMMAND_ABORTED) {
283 scmd_printk(KERN_INFO, cmnd, "abort completed\n");
284 cmnd->result = DID_ABORT << 16;
326349f8 285 list_del(&cmdinfo->dead);
0871d7d8 286 }
c621a81e 287 cmnd->scsi_done(cmnd);
b1d67693 288 return 0;
115bb1ff
MW		 289}
290
291static void uas_xfer_data(struct urb *urb, struct scsi_cmnd *cmnd,
b1d67693 292 unsigned direction)
115bb1ff
MW		 293{
294 struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp;
295 int err;
296
b1d67693 297 cmdinfo->state |= direction | SUBMIT_STATUS_URB;
115bb1ff
MW		 298 err = uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_ATOMIC);
299 if (err) {
1bf8198e 300 uas_add_work(cmdinfo);
115bb1ff
MW		 301 }
302}
303
304static void uas_stat_cmplt(struct urb *urb)
305{
306 struct iu *iu = urb->transfer_buffer;
22188f4a
SAS		 307 struct Scsi_Host *shost = urb->context;
308 struct uas_dev_info *devinfo = (void *)shost->hostdata[0];
115bb1ff 309 struct scsi_cmnd *cmnd;
b1d67693 310 struct uas_cmd_info *cmdinfo;
e0648520 311 unsigned long flags;
115bb1ff
MW		 312 u16 tag;
313
314 if (urb->status) {
326349f8
GH		 315 if (urb->status == -ENOENT) {
316 dev_err(&urb->dev->dev, "stat urb: killed, stream %d\n",
317 urb->stream_id);
318 } else {
319 dev_err(&urb->dev->dev, "stat urb: status %d\n",
320 urb->status);
321 }
db32de11 322 usb_free_urb(urb);
115bb1ff
MW		 323 return;
324 }
325
023b515e
GH		 326 if (devinfo->resetting) {
327 usb_free_urb(urb);
328 return;
329 }
330
e0648520 331 spin_lock_irqsave(&devinfo->lock, flags);
115bb1ff 332 tag = be16_to_cpup(&iu->tag) - 1;
22188f4a
SAS		 333 if (tag == 0)
334 cmnd = devinfo->cmnd;
115bb1ff 335 else
22188f4a 336 cmnd = scsi_host_find_tag(shost, tag - 1);
e0423dee 337
96c1eb98 338 if (!cmnd) {
e0423dee
GH		 339 if (iu->iu_id == IU_ID_RESPONSE) {
340 /* store results for uas_eh_task_mgmt() */
341 memcpy(&devinfo->response, iu, sizeof(devinfo->response));
023b515e 342 }
e0423dee
GH		 343 usb_free_urb(urb);
344 spin_unlock_irqrestore(&devinfo->lock, flags);
345 return;
96c1eb98 346 }
115bb1ff 347
e0423dee 348 cmdinfo = (void *)&cmnd->SCp;
115bb1ff
MW		 349 switch (iu->iu_id) {
350 case IU_ID_STATUS:
22188f4a
SAS		 351 if (devinfo->cmnd == cmnd)
352 devinfo->cmnd = NULL;
353
115bb1ff
MW		 354 if (urb->actual_length < 16)
355 devinfo->uas_sense_old = 1;
356 if (devinfo->uas_sense_old)
357 uas_sense_old(urb, cmnd);
358 else
359 uas_sense(urb, cmnd);
8aac863e
GH		 360 if (cmnd->result != 0) {
361 /* cancel data transfers on error */
7e50e0be 362 uas_unlink_data_urbs(devinfo, cmdinfo, &flags);
8aac863e 363 }
b1d67693
GH		 364 cmdinfo->state &= ~COMMAND_INFLIGHT;
365 uas_try_complete(cmnd, __func__);
115bb1ff
MW		 366 break;
367 case IU_ID_READ_READY:
368 uas_xfer_data(urb, cmnd, SUBMIT_DATA_IN_URB);
369 break;
370 case IU_ID_WRITE_READY:
371 uas_xfer_data(urb, cmnd, SUBMIT_DATA_OUT_URB);
372 break;
373 default:
374 scmd_printk(KERN_ERR, cmnd,
375 "Bogus IU (%d) received on status pipe\n", iu->iu_id);
376 }
e9bd7e1a 377 usb_free_urb(urb);
e0648520 378 spin_unlock_irqrestore(&devinfo->lock, flags);
115bb1ff
MW		 379}
380
c621a81e 381static void uas_data_cmplt(struct urb *urb)
115bb1ff 382{
b1d67693
GH		 383 struct scsi_cmnd *cmnd = urb->context;
384 struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp;
e0648520 385 struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata;
b1d67693 386 struct scsi_data_buffer *sdb = NULL;
e0648520 387 unsigned long flags;
b1d67693 388
e0648520 389 spin_lock_irqsave(&devinfo->lock, flags);
b1d67693
GH		 390 if (cmdinfo->data_in_urb == urb) {
391 sdb = scsi_in(cmnd);
392 cmdinfo->state &= ~DATA_IN_URB_INFLIGHT;
393 } else if (cmdinfo->data_out_urb == urb) {
394 sdb = scsi_out(cmnd);
395 cmdinfo->state &= ~DATA_OUT_URB_INFLIGHT;
396 }
f491ecbb
GH		 397 if (sdb == NULL) {
398 WARN_ON_ONCE(1);
399 } else if (urb->status) {
8aac863e
GH		 400 /* error: no data transfered */
401 sdb->resid = sdb->length;
402 } else {
403 sdb->resid = sdb->length - urb->actual_length;
404 }
b1d67693 405 uas_try_complete(cmnd, __func__);
e0648520 406 spin_unlock_irqrestore(&devinfo->lock, flags);
115bb1ff
MW		 407}
408
409static struct urb *uas_alloc_data_urb(struct uas_dev_info *devinfo, gfp_t gfp,
b1d67693
GH		 410 unsigned int pipe, u16 stream_id,
411 struct scsi_cmnd *cmnd,
412 enum dma_data_direction dir)
115bb1ff
MW		 413{
414 struct usb_device *udev = devinfo->udev;
415 struct urb *urb = usb_alloc_urb(0, gfp);
b1d67693
GH		 416 struct scsi_data_buffer *sdb = (dir == DMA_FROM_DEVICE)
417 ? scsi_in(cmnd) : scsi_out(cmnd);
115bb1ff
MW		 418
419 if (!urb)
420 goto out;
b1d67693
GH		 421 usb_fill_bulk_urb(urb, udev, pipe, NULL, sdb->length,
422 uas_data_cmplt, cmnd);
c621a81e
GH		 423 if (devinfo->use_streams)
424 urb->stream_id = stream_id;
115bb1ff
MW		 425 urb->num_sgs = udev->bus->sg_tablesize ? sdb->table.nents : 0;
426 urb->sg = sdb->table.sgl;
427 out:
428 return urb;
429}
430
431static struct urb *uas_alloc_sense_urb(struct uas_dev_info *devinfo, gfp_t gfp,
e9bd7e1a 432 struct Scsi_Host *shost, u16 stream_id)
115bb1ff
MW		 433{
434 struct usb_device *udev = devinfo->udev;
435 struct urb *urb = usb_alloc_urb(0, gfp);
436 struct sense_iu *iu;
437
438 if (!urb)
439 goto out;
440
ac563cfd 441 iu = kzalloc(sizeof(*iu), gfp);
115bb1ff
MW		 442 if (!iu)
443 goto free;
444
445 usb_fill_bulk_urb(urb, udev, devinfo->status_pipe, iu, sizeof(*iu),
e9bd7e1a 446 uas_stat_cmplt, shost);
115bb1ff
MW		 447 urb->stream_id = stream_id;
448 urb->transfer_flags |= URB_FREE_BUFFER;
449 out:
450 return urb;
451 free:
452 usb_free_urb(urb);
453 return NULL;
454}
455
456static struct urb *uas_alloc_cmd_urb(struct uas_dev_info *devinfo, gfp_t gfp,
a887cd36 457 struct scsi_cmnd *cmnd)
115bb1ff
MW		 458{
459 struct usb_device *udev = devinfo->udev;
460 struct scsi_device *sdev = cmnd->device;
461 struct urb *urb = usb_alloc_urb(0, gfp);
462 struct command_iu *iu;
463 int len;
464
465 if (!urb)
466 goto out;
467
468 len = cmnd->cmd_len - 16;
469 if (len < 0)
470 len = 0;
471 len = ALIGN(len, 4);
ac563cfd 472 iu = kzalloc(sizeof(*iu) + len, gfp);
115bb1ff
MW		 473 if (!iu)
474 goto free;
475
476 iu->iu_id = IU_ID_COMMAND;
9eb44541 477 if (blk_rq_tagged(cmnd->request))
22188f4a 478 iu->tag = cpu_to_be16(cmnd->request->tag + 2);
9eb44541
SS		 479 else
480 iu->tag = cpu_to_be16(1);
02e031cb 481 iu->prio_attr = UAS_SIMPLE_TAG;
115bb1ff
MW		 482 iu->len = len;
483 int_to_scsilun(sdev->lun, &iu->lun);
484 memcpy(iu->cdb, cmnd->cmnd, cmnd->cmd_len);
485
486 usb_fill_bulk_urb(urb, udev, devinfo->cmd_pipe, iu, sizeof(*iu) + len,
487 usb_free_urb, NULL);
488 urb->transfer_flags |= URB_FREE_BUFFER;
489 out:
490 return urb;
491 free:
492 usb_free_urb(urb);
493 return NULL;
494}
495
023b515e
GH		 496static int uas_submit_task_urb(struct scsi_cmnd *cmnd, gfp_t gfp,
497 u8 function, u16 stream_id)
498{
499 struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata;
500 struct usb_device *udev = devinfo->udev;
501 struct urb *urb = usb_alloc_urb(0, gfp);
502 struct task_mgmt_iu *iu;
503 int err = -ENOMEM;
504
505 if (!urb)
506 goto err;
507
508 iu = kzalloc(sizeof(*iu), gfp);
509 if (!iu)
510 goto err;
511
512 iu->iu_id = IU_ID_TASK_MGMT;
513 iu->tag = cpu_to_be16(stream_id);
514 int_to_scsilun(cmnd->device->lun, &iu->lun);
515
516 iu->function = function;
517 switch (function) {
518 case TMF_ABORT_TASK:
519 if (blk_rq_tagged(cmnd->request))
520 iu->task_tag = cpu_to_be16(cmnd->request->tag + 2);
521 else
522 iu->task_tag = cpu_to_be16(1);
523 break;
524 }
525
526 usb_fill_bulk_urb(urb, udev, devinfo->cmd_pipe, iu, sizeof(*iu),
527 usb_free_urb, NULL);
528 urb->transfer_flags |= URB_FREE_BUFFER;
529
d5f808d3 530 usb_anchor_urb(urb, &devinfo->cmd_urbs);
023b515e 531 err = usb_submit_urb(urb, gfp);
d5f808d3
HG		 532 if (err) {
533 usb_unanchor_urb(urb);
023b515e 534 goto err;
d5f808d3 535 }
023b515e
GH		 536
537 return 0;
538
539err:
540 usb_free_urb(urb);
541 return err;
542}
543
115bb1ff
MW		 544/*
545 * Why should I request the Status IU before sending the Command IU? Spec
546 * says to, but also says the device may receive them in any order. Seems
547 * daft to me.
548 */
549
e9bd7e1a
GH		 550static int uas_submit_sense_urb(struct Scsi_Host *shost,
551 gfp_t gfp, unsigned int stream)
115bb1ff 552{
e9bd7e1a
GH		 553 struct uas_dev_info *devinfo = (void *)shost->hostdata[0];
554 struct urb *urb;
115bb1ff 555
e9bd7e1a
GH		 556 urb = uas_alloc_sense_urb(devinfo, gfp, shost, stream);
557 if (!urb)
558 return SCSI_MLQUEUE_DEVICE_BUSY;
d5f808d3 559 usb_anchor_urb(urb, &devinfo->sense_urbs);
e9bd7e1a 560 if (usb_submit_urb(urb, gfp)) {
d5f808d3 561 usb_unanchor_urb(urb);
e9bd7e1a
GH		 562 shost_printk(KERN_INFO, shost,
563 "sense urb submission failure\n");
564 usb_free_urb(urb);
565 return SCSI_MLQUEUE_DEVICE_BUSY;
115bb1ff 566 }
e9bd7e1a
GH		 567 return 0;
568}
569
570static int uas_submit_urbs(struct scsi_cmnd *cmnd,
571 struct uas_dev_info *devinfo, gfp_t gfp)
572{
573 struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp;
574 int err;
115bb1ff 575
f491ecbb 576 WARN_ON_ONCE(!spin_is_locked(&devinfo->lock));
92a3f767 577 if (cmdinfo->state & SUBMIT_STATUS_URB) {
e9bd7e1a
GH		 578 err = uas_submit_sense_urb(cmnd->device->host, gfp,
579 cmdinfo->stream);
580 if (err) {
581 return err;
115bb1ff 582 }
92a3f767 583 cmdinfo->state &= ~SUBMIT_STATUS_URB;
115bb1ff
MW		 584 }
585
586 if (cmdinfo->state & ALLOC_DATA_IN_URB) {
587 cmdinfo->data_in_urb = uas_alloc_data_urb(devinfo, gfp,
c621a81e 588 devinfo->data_in_pipe, cmdinfo->stream,
b1d67693 589 cmnd, DMA_FROM_DEVICE);
115bb1ff
MW		 590 if (!cmdinfo->data_in_urb)
591 return SCSI_MLQUEUE_DEVICE_BUSY;
592 cmdinfo->state &= ~ALLOC_DATA_IN_URB;
593 }
594
595 if (cmdinfo->state & SUBMIT_DATA_IN_URB) {
d5f808d3 596 usb_anchor_urb(cmdinfo->data_in_urb, &devinfo->data_urbs);
115bb1ff 597 if (usb_submit_urb(cmdinfo->data_in_urb, gfp)) {
d5f808d3 598 usb_unanchor_urb(cmdinfo->data_in_urb);
115bb1ff
MW		 599 scmd_printk(KERN_INFO, cmnd,
600 "data in urb submission failure\n");
601 return SCSI_MLQUEUE_DEVICE_BUSY;
602 }
603 cmdinfo->state &= ~SUBMIT_DATA_IN_URB;
b1d67693 604 cmdinfo->state |= DATA_IN_URB_INFLIGHT;
115bb1ff
MW		 605 }
606
607 if (cmdinfo->state & ALLOC_DATA_OUT_URB) {
608 cmdinfo->data_out_urb = uas_alloc_data_urb(devinfo, gfp,
c621a81e 609 devinfo->data_out_pipe, cmdinfo->stream,
b1d67693 610 cmnd, DMA_TO_DEVICE);
115bb1ff
MW		 611 if (!cmdinfo->data_out_urb)
612 return SCSI_MLQUEUE_DEVICE_BUSY;
613 cmdinfo->state &= ~ALLOC_DATA_OUT_URB;
614 }
615
616 if (cmdinfo->state & SUBMIT_DATA_OUT_URB) {
d5f808d3 617 usb_anchor_urb(cmdinfo->data_out_urb, &devinfo->data_urbs);
115bb1ff 618 if (usb_submit_urb(cmdinfo->data_out_urb, gfp)) {
d5f808d3 619 usb_unanchor_urb(cmdinfo->data_out_urb);
115bb1ff
MW		 620 scmd_printk(KERN_INFO, cmnd,
621 "data out urb submission failure\n");
622 return SCSI_MLQUEUE_DEVICE_BUSY;
623 }
624 cmdinfo->state &= ~SUBMIT_DATA_OUT_URB;
b1d67693 625 cmdinfo->state |= DATA_OUT_URB_INFLIGHT;
115bb1ff
MW		 626 }
627
628 if (cmdinfo->state & ALLOC_CMD_URB) {
a887cd36 629 cmdinfo->cmd_urb = uas_alloc_cmd_urb(devinfo, gfp, cmnd);
115bb1ff
MW		 630 if (!cmdinfo->cmd_urb)
631 return SCSI_MLQUEUE_DEVICE_BUSY;
632 cmdinfo->state &= ~ALLOC_CMD_URB;
633 }
634
635 if (cmdinfo->state & SUBMIT_CMD_URB) {
d5f808d3 636 usb_anchor_urb(cmdinfo->cmd_urb, &devinfo->cmd_urbs);
115bb1ff 637 if (usb_submit_urb(cmdinfo->cmd_urb, gfp)) {
d5f808d3 638 usb_unanchor_urb(cmdinfo->cmd_urb);
115bb1ff
MW		 639 scmd_printk(KERN_INFO, cmnd,
640 "cmd urb submission failure\n");
641 return SCSI_MLQUEUE_DEVICE_BUSY;
642 }
a0e39e34 643 cmdinfo->cmd_urb = NULL;
115bb1ff 644 cmdinfo->state &= ~SUBMIT_CMD_URB;
b1d67693 645 cmdinfo->state |= COMMAND_INFLIGHT;
115bb1ff
MW		 646 }
647
648 return 0;
649}
650
f281233d 651static int uas_queuecommand_lck(struct scsi_cmnd *cmnd,
115bb1ff
MW		 652 void (*done)(struct scsi_cmnd *))
653{
654 struct scsi_device *sdev = cmnd->device;
655 struct uas_dev_info *devinfo = sdev->hostdata;
656 struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp;
e0648520 657 unsigned long flags;
115bb1ff
MW		 658 int err;
659
660 BUILD_BUG_ON(sizeof(struct uas_cmd_info) > sizeof(struct scsi_pointer));
661
f8be6bfc
GH		 662 if (devinfo->resetting) {
663 cmnd->result = DID_ERROR << 16;
664 cmnd->scsi_done(cmnd);
665 return 0;
666 }
667
e0648520
GH		 668 spin_lock_irqsave(&devinfo->lock, flags);
669 if (devinfo->cmnd) {
670 spin_unlock_irqrestore(&devinfo->lock, flags);
115bb1ff 671 return SCSI_MLQUEUE_DEVICE_BUSY;
e0648520 672 }
115bb1ff
MW		 673
674 if (blk_rq_tagged(cmnd->request)) {
22188f4a 675 cmdinfo->stream = cmnd->request->tag + 2;
115bb1ff 676 } else {
22188f4a 677 devinfo->cmnd = cmnd;
115bb1ff
MW		 678 cmdinfo->stream = 1;
679 }
680
681 cmnd->scsi_done = done;
682
e9bd7e1a 683 cmdinfo->state = SUBMIT_STATUS_URB |
115bb1ff
MW		 684 ALLOC_CMD_URB | SUBMIT_CMD_URB;
685
686 switch (cmnd->sc_data_direction) {
687 case DMA_FROM_DEVICE:
688 cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB;
689 break;
690 case DMA_BIDIRECTIONAL:
691 cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB;
692 case DMA_TO_DEVICE:
693 cmdinfo->state |= ALLOC_DATA_OUT_URB | SUBMIT_DATA_OUT_URB;
694 case DMA_NONE:
695 break;
696 }
697
698 if (!devinfo->use_streams) {
db32de11 699 cmdinfo->state &= ~(SUBMIT_DATA_IN_URB | SUBMIT_DATA_OUT_URB);
115bb1ff
MW		 700 cmdinfo->stream = 0;
701 }
702
703 err = uas_submit_urbs(cmnd, devinfo, GFP_ATOMIC);
704 if (err) {
705 /* If we did nothing, give up now */
92a3f767 706 if (cmdinfo->state & SUBMIT_STATUS_URB) {
e0648520 707 spin_unlock_irqrestore(&devinfo->lock, flags);
115bb1ff
MW		 708 return SCSI_MLQUEUE_DEVICE_BUSY;
709 }
1bf8198e 710 uas_add_work(cmdinfo);
115bb1ff
MW		 711 }
712
e0648520 713 spin_unlock_irqrestore(&devinfo->lock, flags);
115bb1ff
MW		 714 return 0;
715}
716
f281233d
JG		 717static DEF_SCSI_QCMD(uas_queuecommand)
718
023b515e
GH		 719static int uas_eh_task_mgmt(struct scsi_cmnd *cmnd,
720 const char *fname, u8 function)
115bb1ff 721{
023b515e
GH		 722 struct Scsi_Host *shost = cmnd->device->host;
723 struct uas_dev_info *devinfo = (void *)shost->hostdata[0];
03939864 724 u16 tag = devinfo->qdepth - 1;
e0648520 725 unsigned long flags;
115bb1ff 726
e0648520 727 spin_lock_irqsave(&devinfo->lock, flags);
023b515e 728 memset(&devinfo->response, 0, sizeof(devinfo->response));
e0648520 729 if (uas_submit_sense_urb(shost, GFP_ATOMIC, tag)) {
023b515e
GH		 730 shost_printk(KERN_INFO, shost,
731 "%s: %s: submit sense urb failed\n",
732 __func__, fname);
1994ff40 733 spin_unlock_irqrestore(&devinfo->lock, flags);
023b515e
GH		 734 return FAILED;
735 }
e0648520 736 if (uas_submit_task_urb(cmnd, GFP_ATOMIC, function, tag)) {
023b515e
GH		 737 shost_printk(KERN_INFO, shost,
738 "%s: %s: submit task mgmt urb failed\n",
739 __func__, fname);
1994ff40 740 spin_unlock_irqrestore(&devinfo->lock, flags);
023b515e
GH		 741 return FAILED;
742 }
e0648520
GH		 743 spin_unlock_irqrestore(&devinfo->lock, flags);
744
745 if (usb_wait_anchor_empty_timeout(&devinfo->sense_urbs, 3000) == 0) {
023b515e
GH		 746 shost_printk(KERN_INFO, shost,
747 "%s: %s timed out\n", __func__, fname);
748 return FAILED;
749 }
750 if (be16_to_cpu(devinfo->response.tag) != tag) {
751 shost_printk(KERN_INFO, shost,
752 "%s: %s failed (wrong tag %d/%d)\n", __func__,
753 fname, be16_to_cpu(devinfo->response.tag), tag);
754 return FAILED;
755 }
756 if (devinfo->response.response_code != RC_TMF_COMPLETE) {
757 shost_printk(KERN_INFO, shost,
758 "%s: %s failed (rc 0x%x)\n", __func__,
759 fname, devinfo->response.response_code);
760 return FAILED;
761 }
762 return SUCCESS;
115bb1ff
MW		 763}
764
023b515e 765static int uas_eh_abort_handler(struct scsi_cmnd *cmnd)
115bb1ff 766{
023b515e 767 struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp;
e0648520
GH		 768 struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata;
769 unsigned long flags;
023b515e 770 int ret;
115bb1ff 771
023b515e 772 uas_log_cmd_state(cmnd, __func__);
e0648520 773 spin_lock_irqsave(&devinfo->lock, flags);
f491ecbb 774 WARN_ON_ONCE(cmdinfo->state & COMMAND_ABORTED);
ef018cc9 775 cmdinfo->state |= COMMAND_ABORTED;
326349f8 776 list_add_tail(&cmdinfo->dead, &devinfo->dead_list);
5d390403 777 if (cmdinfo->state & IS_IN_WORK_LIST) {
1bf8198e 778 list_del(&cmdinfo->work);
5d390403 779 cmdinfo->state &= ~IS_IN_WORK_LIST;
5d390403
GH		 780 }
781 if (cmdinfo->state & COMMAND_INFLIGHT) {
782 spin_unlock_irqrestore(&devinfo->lock, flags);
783 ret = uas_eh_task_mgmt(cmnd, "ABORT TASK", TMF_ABORT_TASK);
784 } else {
7e50e0be 785 uas_unlink_data_urbs(devinfo, cmdinfo, &flags);
5d390403
GH		 786 uas_try_complete(cmnd, __func__);
787 spin_unlock_irqrestore(&devinfo->lock, flags);
788 ret = SUCCESS;
789 }
023b515e 790 return ret;
115bb1ff
MW		 791}
792
023b515e 793static int uas_eh_device_reset_handler(struct scsi_cmnd *cmnd)
115bb1ff 794{
023b515e
GH		 795 sdev_printk(KERN_INFO, cmnd->device, "%s\n", __func__);
796 return uas_eh_task_mgmt(cmnd, "LOGICAL UNIT RESET",
797 TMF_LOGICAL_UNIT_RESET);
115bb1ff
MW		 798}
799
800static int uas_eh_bus_reset_handler(struct scsi_cmnd *cmnd)
801{
802 struct scsi_device *sdev = cmnd->device;
803 struct uas_dev_info *devinfo = sdev->hostdata;
804 struct usb_device *udev = devinfo->udev;
023b515e 805 int err;
115bb1ff 806
326349f8 807 shost_printk(KERN_INFO, sdev->host, "%s start\n", __func__);
023b515e 808 devinfo->resetting = 1;
4c456971 809 uas_abort_work(devinfo);
a0e39e34 810 usb_kill_anchored_urbs(&devinfo->cmd_urbs);
023b515e
GH		 811 usb_kill_anchored_urbs(&devinfo->sense_urbs);
812 usb_kill_anchored_urbs(&devinfo->data_urbs);
326349f8 813 uas_zap_dead(devinfo);
d89bd835 814 uas_free_streams(devinfo);
023b515e 815 err = usb_reset_device(udev);
d89bd835
GH		 816 if (!err)
817 uas_configure_endpoints(devinfo);
023b515e 818 devinfo->resetting = 0;
115bb1ff 819
023b515e
GH		 820 if (err) {
821 shost_printk(KERN_INFO, sdev->host, "%s FAILED\n", __func__);
822 return FAILED;
823 }
115bb1ff 824
023b515e
GH		 825 shost_printk(KERN_INFO, sdev->host, "%s success\n", __func__);
826 return SUCCESS;
115bb1ff
MW		 827}
828
829static int uas_slave_alloc(struct scsi_device *sdev)
830{
831 sdev->hostdata = (void *)sdev->host->hostdata[0];
832 return 0;
833}
834
835static int uas_slave_configure(struct scsi_device *sdev)
836{
837 struct uas_dev_info *devinfo = sdev->hostdata;
838 scsi_set_tag_type(sdev, MSG_ORDERED_TAG);
03939864 839 scsi_activate_tcq(sdev, devinfo->qdepth - 3);
115bb1ff
MW		 840 return 0;
841}
842
843static struct scsi_host_template uas_host_template = {
844 .module = THIS_MODULE,
845 .name = "uas",
846 .queuecommand = uas_queuecommand,
847 .slave_alloc = uas_slave_alloc,
848 .slave_configure = uas_slave_configure,
849 .eh_abort_handler = uas_eh_abort_handler,
850 .eh_device_reset_handler = uas_eh_device_reset_handler,
115bb1ff
MW		 851 .eh_bus_reset_handler = uas_eh_bus_reset_handler,
852 .can_queue = 65536, /* Is there a limit on the _host_ ? */
853 .this_id = -1,
854 .sg_tablesize = SG_NONE,
855 .cmd_per_lun = 1, /* until we override it */
856 .skip_settle_delay = 1,
857 .ordered_tag = 1,
858};
859
860static struct usb_device_id uas_usb_ids[] = {
861 { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_BULK) },
862 { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_UAS) },
863 /* 0xaa is a prototype device I happen to have access to */
864 { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, 0xaa) },
865 { }
866};
867MODULE_DEVICE_TABLE(usb, uas_usb_ids);
868
89dc2905
MW		 869static int uas_is_interface(struct usb_host_interface *intf)
870{
871 return (intf->desc.bInterfaceClass == USB_CLASS_MASS_STORAGE &&
872 intf->desc.bInterfaceSubClass == USB_SC_SCSI &&
873 intf->desc.bInterfaceProtocol == USB_PR_UAS);
874}
875
c898add5
SAS		 876static int uas_isnt_supported(struct usb_device *udev)
877{
878 struct usb_hcd *hcd = bus_to_hcd(udev->bus);
879
880 dev_warn(&udev->dev, "The driver for the USB controller %s does not "
881 "support scatter-gather which is\n",
882 hcd->driver->description);
883 dev_warn(&udev->dev, "required by the UAS driver. Please try an"
884 "alternative USB controller if you wish to use UAS.\n");
885 return -ENODEV;
886}
887
89dc2905
MW		 888static int uas_switch_interface(struct usb_device *udev,
889 struct usb_interface *intf)
890{
891 int i;
c898add5 892 int sg_supported = udev->bus->sg_tablesize != 0;
89dc2905
MW		 893
894 for (i = 0; i < intf->num_altsetting; i++) {
895 struct usb_host_interface *alt = &intf->altsetting[i];
c898add5
SAS		 896
897 if (uas_is_interface(alt)) {
898 if (!sg_supported)
899 return uas_isnt_supported(udev);
89dc2905
MW		 900 return usb_set_interface(udev,
901 alt->desc.bInterfaceNumber,
902 alt->desc.bAlternateSetting);
c898add5 903 }
89dc2905
MW		 904 }
905
906 return -ENODEV;
907}
908
115bb1ff
MW		 909static void uas_configure_endpoints(struct uas_dev_info *devinfo)
910{
911 struct usb_host_endpoint *eps[4] = { };
912 struct usb_interface *intf = devinfo->intf;
913 struct usb_device *udev = devinfo->udev;
914 struct usb_host_endpoint *endpoint = intf->cur_altsetting->endpoint;
915 unsigned i, n_endpoints = intf->cur_altsetting->desc.bNumEndpoints;
916
917 devinfo->uas_sense_old = 0;
22188f4a 918 devinfo->cmnd = NULL;
115bb1ff
MW		 919
920 for (i = 0; i < n_endpoints; i++) {
921 unsigned char *extra = endpoint[i].extra;
922 int len = endpoint[i].extralen;
923 while (len > 1) {
924 if (extra[1] == USB_DT_PIPE_USAGE) {
925 unsigned pipe_id = extra[2];
926 if (pipe_id > 0 && pipe_id < 5)
927 eps[pipe_id - 1] = &endpoint[i];
928 break;
929 }
930 len -= extra[0];
931 extra += extra[0];
932 }
933 }
934
935 /*
936 * Assume that if we didn't find a control pipe descriptor, we're
937 * using a device with old firmware that happens to be set up like
938 * this.
939 */
940 if (!eps[0]) {
941 devinfo->cmd_pipe = usb_sndbulkpipe(udev, 1);
942 devinfo->status_pipe = usb_rcvbulkpipe(udev, 1);
943 devinfo->data_in_pipe = usb_rcvbulkpipe(udev, 2);
944 devinfo->data_out_pipe = usb_sndbulkpipe(udev, 2);
945
946 eps[1] = usb_pipe_endpoint(udev, devinfo->status_pipe);
947 eps[2] = usb_pipe_endpoint(udev, devinfo->data_in_pipe);
948 eps[3] = usb_pipe_endpoint(udev, devinfo->data_out_pipe);
949 } else {
950 devinfo->cmd_pipe = usb_sndbulkpipe(udev,
6c2334e9 951 usb_endpoint_num(&eps[0]->desc));
115bb1ff 952 devinfo->status_pipe = usb_rcvbulkpipe(udev,
6c2334e9 953 usb_endpoint_num(&eps[1]->desc));
115bb1ff 954 devinfo->data_in_pipe = usb_rcvbulkpipe(udev,
6c2334e9 955 usb_endpoint_num(&eps[2]->desc));
115bb1ff 956 devinfo->data_out_pipe = usb_sndbulkpipe(udev,
6c2334e9 957 usb_endpoint_num(&eps[3]->desc));
115bb1ff
MW		 958 }
959
960 devinfo->qdepth = usb_alloc_streams(devinfo->intf, eps + 1, 3, 256,
961 GFP_KERNEL);
962 if (devinfo->qdepth < 0) {
963 devinfo->qdepth = 256;
964 devinfo->use_streams = 0;
965 } else {
966 devinfo->use_streams = 1;
967 }
968}
969
dae51546
SAS		 970static void uas_free_streams(struct uas_dev_info *devinfo)
971{
972 struct usb_device *udev = devinfo->udev;
973 struct usb_host_endpoint *eps[3];
974
975 eps[0] = usb_pipe_endpoint(udev, devinfo->status_pipe);
976 eps[1] = usb_pipe_endpoint(udev, devinfo->data_in_pipe);
977 eps[2] = usb_pipe_endpoint(udev, devinfo->data_out_pipe);
978 usb_free_streams(devinfo->intf, eps, 3, GFP_KERNEL);
979}
980
115bb1ff
MW		 981/*
982 * XXX: What I'd like to do here is register a SCSI host for each USB host in
983 * the system. Follow usb-storage's design of registering a SCSI host for
984 * each USB device for the moment. Can implement this by walking up the
985 * USB hierarchy until we find a USB host.
986 */
987static int uas_probe(struct usb_interface *intf, const struct usb_device_id *id)
988{
6ce8213b
HG		 989 int result = -ENOMEM;
990 struct Scsi_Host *shost = NULL;
115bb1ff
MW		 991 struct uas_dev_info *devinfo;
992 struct usb_device *udev = interface_to_usbdev(intf);
993
89dc2905
MW		 994 if (uas_switch_interface(udev, intf))
995 return -ENODEV;
115bb1ff
MW		 996
997 devinfo = kmalloc(sizeof(struct uas_dev_info), GFP_KERNEL);
998 if (!devinfo)
6ce8213b 999 goto set_alt0;
115bb1ff 1000
115bb1ff
MW		 1001 shost = scsi_host_alloc(&uas_host_template, sizeof(void *));
1002 if (!shost)
6ce8213b 1003 goto set_alt0;
115bb1ff
MW		 1004
1005 shost->max_cmd_len = 16 + 252;
1006 shost->max_id = 1;
bde027b4
GH		 1007 shost->max_lun = 256;
1008 shost->max_channel = 0;
115bb1ff
MW		 1009 shost->sg_tablesize = udev->bus->sg_tablesize;
1010
115bb1ff
MW		 1011 devinfo->intf = intf;
1012 devinfo->udev = udev;
023b515e 1013 devinfo->resetting = 0;
a0e39e34 1014 init_usb_anchor(&devinfo->cmd_urbs);
bdd000fb
GH		 1015 init_usb_anchor(&devinfo->sense_urbs);
1016 init_usb_anchor(&devinfo->data_urbs);
e0648520 1017 spin_lock_init(&devinfo->lock);
1bf8198e
GH		 1018 INIT_WORK(&devinfo->work, uas_do_work);
1019 INIT_LIST_HEAD(&devinfo->work_list);
326349f8 1020 INIT_LIST_HEAD(&devinfo->dead_list);
115bb1ff
MW		 1021 uas_configure_endpoints(devinfo);
1022
03939864 1023 result = scsi_init_shared_tag_map(shost, devinfo->qdepth - 3);
115bb1ff 1024 if (result)
6ce8213b 1025 goto free_streams;
dae51546
SAS		 1026
1027 result = scsi_add_host(shost, &intf->dev);
1028 if (result)
6ce8213b 1029 goto free_streams;
dae51546 1030
115bb1ff
MW		 1031 shost->hostdata[0] = (unsigned long)devinfo;
1032
115bb1ff
MW		 1033 scsi_scan_host(shost);
1034 usb_set_intfdata(intf, shost);
1035 return result;
dae51546 1036
6ce8213b 1037free_streams:
dae51546 1038 uas_free_streams(devinfo);
6ce8213b
HG		 1039set_alt0:
1040 usb_set_interface(udev, intf->altsetting[0].desc.bInterfaceNumber, 0);
115bb1ff
MW		 1041 kfree(devinfo);
1042 if (shost)
1043 scsi_host_put(shost);
1044 return result;
1045}
1046
1047static int uas_pre_reset(struct usb_interface *intf)
1048{
1049/* XXX: Need to return 1 if it's not our device in error handling */
1050 return 0;
1051}
1052
1053static int uas_post_reset(struct usb_interface *intf)
1054{
1055/* XXX: Need to return 1 if it's not our device in error handling */
1056 return 0;
1057}
1058
1059static void uas_disconnect(struct usb_interface *intf)
1060{
115bb1ff
MW		 1061 struct Scsi_Host *shost = usb_get_intfdata(intf);
1062 struct uas_dev_info *devinfo = (void *)shost->hostdata[0];
1063
4c456971 1064 devinfo->resetting = 1;
1bf8198e 1065 cancel_work_sync(&devinfo->work);
4c456971 1066 uas_abort_work(devinfo);
a0e39e34 1067 usb_kill_anchored_urbs(&devinfo->cmd_urbs);
bdd000fb
GH		 1068 usb_kill_anchored_urbs(&devinfo->sense_urbs);
1069 usb_kill_anchored_urbs(&devinfo->data_urbs);
326349f8 1070 uas_zap_dead(devinfo);
4c456971 1071 scsi_remove_host(shost);
dae51546 1072 uas_free_streams(devinfo);
115bb1ff
MW		 1073 kfree(devinfo);
1074}
1075
1076/*
1077 * XXX: Should this plug into libusual so we can auto-upgrade devices from
1078 * Bulk-Only to UAS?
1079 */
1080static struct usb_driver uas_driver = {
1081 .name = "uas",
1082 .probe = uas_probe,
1083 .disconnect = uas_disconnect,
1084 .pre_reset = uas_pre_reset,
1085 .post_reset = uas_post_reset,
1086 .id_table = uas_usb_ids,
1087};
1088
65db4305 1089module_usb_driver(uas_driver);
115bb1ff
MW		 1090
1091MODULE_LICENSE("GPL");
1092MODULE_AUTHOR("Matthew Wilcox and Sarah Sharp");
Linux 6.x block layer and io_uring tree(s)