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 | * | |
f50a4968 | 5 | * Copyright Hans de Goede <hdegoede@redhat.com> for Red Hat, Inc. 2013 |
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 HG |
30 | #include "uas-detect.h" |
31 | ||
115bb1ff MW |
32 | /* |
33 | * The r00-r01c specs define this version of the SENSE IU data structure. | |
34 | * It's still in use by several different firmware releases. | |
35 | */ | |
36 | struct sense_iu_old { | |
37 | __u8 iu_id; | |
38 | __u8 rsvd1; | |
39 | __be16 tag; | |
40 | __be16 len; | |
41 | __u8 status; | |
42 | __u8 service_response; | |
43 | __u8 sense[SCSI_SENSE_BUFFERSIZE]; | |
44 | }; | |
45 | ||
115bb1ff MW |
46 | struct uas_dev_info { |
47 | struct usb_interface *intf; | |
48 | struct usb_device *udev; | |
a0e39e34 | 49 | struct usb_anchor cmd_urbs; |
bdd000fb GH |
50 | struct usb_anchor sense_urbs; |
51 | struct usb_anchor data_urbs; | |
023b515e | 52 | int qdepth, resetting; |
e52e0314 | 53 | struct response_iu response; |
115bb1ff MW |
54 | unsigned cmd_pipe, status_pipe, data_in_pipe, data_out_pipe; |
55 | unsigned use_streams:1; | |
56 | unsigned uas_sense_old:1; | |
b83b86a3 | 57 | unsigned running_task:1; |
da65c2bb | 58 | unsigned shutdown:1; |
22188f4a | 59 | struct scsi_cmnd *cmnd; |
e0648520 | 60 | spinlock_t lock; |
1bf8198e | 61 | struct work_struct work; |
61c09ce5 | 62 | struct list_head inflight_list; |
326349f8 | 63 | struct list_head dead_list; |
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), |
b06e48af | 79 | UNLINK_DATA_URBS = (1 << 13), |
efefecf3 | 80 | IS_IN_WORK_LIST = (1 << 14), |
115bb1ff MW |
81 | }; |
82 | ||
83 | /* Overrides scsi_pointer */ | |
84 | struct uas_cmd_info { | |
85 | unsigned int state; | |
86 | unsigned int stream; | |
87 | struct urb *cmd_urb; | |
115bb1ff MW |
88 | struct urb *data_in_urb; |
89 | struct urb *data_out_urb; | |
040d1a8f | 90 | struct list_head list; |
115bb1ff MW |
91 | }; |
92 | ||
93 | /* I hate forward declarations, but I actually have a loop */ | |
94 | static int uas_submit_urbs(struct scsi_cmnd *cmnd, | |
95 | struct uas_dev_info *devinfo, gfp_t gfp); | |
ea9da1c7 | 96 | static void uas_do_work(struct work_struct *work); |
4c456971 | 97 | static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller); |
d89bd835 | 98 | static void uas_free_streams(struct uas_dev_info *devinfo); |
326349f8 | 99 | static void uas_log_cmd_state(struct scsi_cmnd *cmnd, const char *caller); |
115bb1ff | 100 | |
7e50e0be | 101 | /* Must be called with devinfo->lock held, will temporary unlock the lock */ |
aa8f6123 | 102 | static void uas_unlink_data_urbs(struct uas_dev_info *devinfo, |
7e50e0be HG |
103 | struct uas_cmd_info *cmdinfo, |
104 | unsigned long *lock_flags) | |
aa8f6123 | 105 | { |
b06e48af GH |
106 | /* |
107 | * The UNLINK_DATA_URBS flag makes sure uas_try_complete | |
108 | * (called by urb completion) doesn't release cmdinfo | |
109 | * underneath us. | |
110 | */ | |
b06e48af | 111 | cmdinfo->state |= UNLINK_DATA_URBS; |
7e50e0be | 112 | spin_unlock_irqrestore(&devinfo->lock, *lock_flags); |
b06e48af | 113 | |
aa8f6123 GH |
114 | if (cmdinfo->data_in_urb) |
115 | usb_unlink_urb(cmdinfo->data_in_urb); | |
116 | if (cmdinfo->data_out_urb) | |
117 | usb_unlink_urb(cmdinfo->data_out_urb); | |
b06e48af | 118 | |
7e50e0be | 119 | spin_lock_irqsave(&devinfo->lock, *lock_flags); |
b06e48af | 120 | cmdinfo->state &= ~UNLINK_DATA_URBS; |
aa8f6123 GH |
121 | } |
122 | ||
115bb1ff MW |
123 | static void uas_do_work(struct work_struct *work) |
124 | { | |
1bf8198e GH |
125 | struct uas_dev_info *devinfo = |
126 | container_of(work, struct uas_dev_info, work); | |
115bb1ff | 127 | struct uas_cmd_info *cmdinfo; |
e0648520 | 128 | unsigned long flags; |
ea9da1c7 | 129 | int err; |
115bb1ff | 130 | |
1bf8198e | 131 | spin_lock_irqsave(&devinfo->lock, flags); |
040d1a8f | 132 | list_for_each_entry(cmdinfo, &devinfo->inflight_list, list) { |
115bb1ff | 133 | struct scsi_pointer *scp = (void *)cmdinfo; |
1bf8198e GH |
134 | struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, |
135 | SCp); | |
61c09ce5 HG |
136 | |
137 | if (!(cmdinfo->state & IS_IN_WORK_LIST)) | |
138 | continue; | |
139 | ||
e36e6493 | 140 | err = uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_NOIO); |
61c09ce5 | 141 | if (!err) |
efefecf3 | 142 | cmdinfo->state &= ~IS_IN_WORK_LIST; |
61c09ce5 | 143 | else |
1bf8198e | 144 | schedule_work(&devinfo->work); |
115bb1ff | 145 | } |
1bf8198e | 146 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
147 | } |
148 | ||
da3033ea | 149 | static void uas_mark_cmd_dead(struct uas_dev_info *devinfo, |
673331c8 HG |
150 | struct uas_cmd_info *cmdinfo, |
151 | int result, const char *caller) | |
da3033ea HG |
152 | { |
153 | struct scsi_pointer *scp = (void *)cmdinfo; | |
154 | struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, SCp); | |
155 | ||
156 | uas_log_cmd_state(cmnd, caller); | |
157 | WARN_ON_ONCE(!spin_is_locked(&devinfo->lock)); | |
158 | WARN_ON_ONCE(cmdinfo->state & COMMAND_ABORTED); | |
159 | cmdinfo->state |= COMMAND_ABORTED; | |
160 | cmdinfo->state &= ~IS_IN_WORK_LIST; | |
673331c8 | 161 | cmnd->result = result << 16; |
040d1a8f | 162 | list_move_tail(&cmdinfo->list, &devinfo->dead_list); |
da3033ea HG |
163 | } |
164 | ||
673331c8 HG |
165 | static void uas_abort_inflight(struct uas_dev_info *devinfo, int result, |
166 | const char *caller) | |
4c456971 GH |
167 | { |
168 | struct uas_cmd_info *cmdinfo; | |
169 | struct uas_cmd_info *temp; | |
4c456971 GH |
170 | unsigned long flags; |
171 | ||
4c456971 | 172 | spin_lock_irqsave(&devinfo->lock, flags); |
040d1a8f | 173 | list_for_each_entry_safe(cmdinfo, temp, &devinfo->inflight_list, list) |
673331c8 | 174 | uas_mark_cmd_dead(devinfo, cmdinfo, result, caller); |
4c456971 GH |
175 | spin_unlock_irqrestore(&devinfo->lock, flags); |
176 | } | |
177 | ||
1bf8198e GH |
178 | static void uas_add_work(struct uas_cmd_info *cmdinfo) |
179 | { | |
180 | struct scsi_pointer *scp = (void *)cmdinfo; | |
181 | struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, SCp); | |
182 | struct uas_dev_info *devinfo = cmnd->device->hostdata; | |
183 | ||
f491ecbb | 184 | WARN_ON_ONCE(!spin_is_locked(&devinfo->lock)); |
1bf8198e GH |
185 | cmdinfo->state |= IS_IN_WORK_LIST; |
186 | schedule_work(&devinfo->work); | |
187 | } | |
188 | ||
326349f8 GH |
189 | static void uas_zap_dead(struct uas_dev_info *devinfo) |
190 | { | |
191 | struct uas_cmd_info *cmdinfo; | |
192 | struct uas_cmd_info *temp; | |
193 | unsigned long flags; | |
194 | ||
195 | spin_lock_irqsave(&devinfo->lock, flags); | |
040d1a8f | 196 | list_for_each_entry_safe(cmdinfo, temp, &devinfo->dead_list, list) { |
326349f8 GH |
197 | struct scsi_pointer *scp = (void *)cmdinfo; |
198 | struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, | |
199 | SCp); | |
200 | uas_log_cmd_state(cmnd, __func__); | |
f491ecbb | 201 | WARN_ON_ONCE(!(cmdinfo->state & COMMAND_ABORTED)); |
326349f8 GH |
202 | /* all urbs are killed, clear inflight bits */ |
203 | cmdinfo->state &= ~(COMMAND_INFLIGHT | | |
204 | DATA_IN_URB_INFLIGHT | | |
205 | DATA_OUT_URB_INFLIGHT); | |
206 | uas_try_complete(cmnd, __func__); | |
207 | } | |
b83b86a3 | 208 | devinfo->running_task = 0; |
326349f8 GH |
209 | spin_unlock_irqrestore(&devinfo->lock, flags); |
210 | } | |
211 | ||
115bb1ff MW |
212 | static void uas_sense(struct urb *urb, struct scsi_cmnd *cmnd) |
213 | { | |
214 | struct sense_iu *sense_iu = urb->transfer_buffer; | |
215 | struct scsi_device *sdev = cmnd->device; | |
216 | ||
217 | if (urb->actual_length > 16) { | |
218 | unsigned len = be16_to_cpup(&sense_iu->len); | |
219 | if (len + 16 != urb->actual_length) { | |
220 | int newlen = min(len + 16, urb->actual_length) - 16; | |
221 | if (newlen < 0) | |
222 | newlen = 0; | |
223 | sdev_printk(KERN_INFO, sdev, "%s: urb length %d " | |
224 | "disagrees with IU sense data length %d, " | |
225 | "using %d bytes of sense data\n", __func__, | |
226 | urb->actual_length, len, newlen); | |
227 | len = newlen; | |
228 | } | |
229 | memcpy(cmnd->sense_buffer, sense_iu->sense, len); | |
230 | } | |
231 | ||
232 | cmnd->result = sense_iu->status; | |
115bb1ff MW |
233 | } |
234 | ||
235 | static void uas_sense_old(struct urb *urb, struct scsi_cmnd *cmnd) | |
236 | { | |
237 | struct sense_iu_old *sense_iu = urb->transfer_buffer; | |
238 | struct scsi_device *sdev = cmnd->device; | |
239 | ||
240 | if (urb->actual_length > 8) { | |
241 | unsigned len = be16_to_cpup(&sense_iu->len) - 2; | |
242 | if (len + 8 != urb->actual_length) { | |
243 | int newlen = min(len + 8, urb->actual_length) - 8; | |
244 | if (newlen < 0) | |
245 | newlen = 0; | |
246 | sdev_printk(KERN_INFO, sdev, "%s: urb length %d " | |
247 | "disagrees with IU sense data length %d, " | |
248 | "using %d bytes of sense data\n", __func__, | |
249 | urb->actual_length, len, newlen); | |
250 | len = newlen; | |
251 | } | |
252 | memcpy(cmnd->sense_buffer, sense_iu->sense, len); | |
253 | } | |
254 | ||
255 | cmnd->result = sense_iu->status; | |
b1d67693 GH |
256 | } |
257 | ||
258 | static void uas_log_cmd_state(struct scsi_cmnd *cmnd, const char *caller) | |
259 | { | |
260 | struct uas_cmd_info *ci = (void *)&cmnd->SCp; | |
261 | ||
262 | scmd_printk(KERN_INFO, cmnd, "%s %p tag %d, inflight:" | |
efefecf3 | 263 | "%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", |
b1d67693 GH |
264 | caller, cmnd, cmnd->request->tag, |
265 | (ci->state & SUBMIT_STATUS_URB) ? " s-st" : "", | |
266 | (ci->state & ALLOC_DATA_IN_URB) ? " a-in" : "", | |
267 | (ci->state & SUBMIT_DATA_IN_URB) ? " s-in" : "", | |
268 | (ci->state & ALLOC_DATA_OUT_URB) ? " a-out" : "", | |
269 | (ci->state & SUBMIT_DATA_OUT_URB) ? " s-out" : "", | |
270 | (ci->state & ALLOC_CMD_URB) ? " a-cmd" : "", | |
271 | (ci->state & SUBMIT_CMD_URB) ? " s-cmd" : "", | |
272 | (ci->state & COMMAND_INFLIGHT) ? " CMD" : "", | |
273 | (ci->state & DATA_IN_URB_INFLIGHT) ? " IN" : "", | |
274 | (ci->state & DATA_OUT_URB_INFLIGHT) ? " OUT" : "", | |
ef018cc9 | 275 | (ci->state & COMMAND_COMPLETED) ? " done" : "", |
b06e48af | 276 | (ci->state & COMMAND_ABORTED) ? " abort" : "", |
efefecf3 GH |
277 | (ci->state & UNLINK_DATA_URBS) ? " unlink": "", |
278 | (ci->state & IS_IN_WORK_LIST) ? " work" : ""); | |
b1d67693 GH |
279 | } |
280 | ||
281 | static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller) | |
282 | { | |
283 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
e0648520 | 284 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
b1d67693 | 285 | |
f491ecbb | 286 | WARN_ON_ONCE(!spin_is_locked(&devinfo->lock)); |
b1d67693 GH |
287 | if (cmdinfo->state & (COMMAND_INFLIGHT | |
288 | DATA_IN_URB_INFLIGHT | | |
b06e48af GH |
289 | DATA_OUT_URB_INFLIGHT | |
290 | UNLINK_DATA_URBS)) | |
b1d67693 | 291 | return -EBUSY; |
f491ecbb | 292 | WARN_ON_ONCE(cmdinfo->state & COMMAND_COMPLETED); |
b1d67693 GH |
293 | cmdinfo->state |= COMMAND_COMPLETED; |
294 | usb_free_urb(cmdinfo->data_in_urb); | |
295 | usb_free_urb(cmdinfo->data_out_urb); | |
673331c8 | 296 | if (cmdinfo->state & COMMAND_ABORTED) |
0871d7d8 | 297 | scmd_printk(KERN_INFO, cmnd, "abort completed\n"); |
040d1a8f | 298 | list_del(&cmdinfo->list); |
c621a81e | 299 | cmnd->scsi_done(cmnd); |
b1d67693 | 300 | return 0; |
115bb1ff MW |
301 | } |
302 | ||
303 | static void uas_xfer_data(struct urb *urb, struct scsi_cmnd *cmnd, | |
b1d67693 | 304 | unsigned direction) |
115bb1ff MW |
305 | { |
306 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
307 | int err; | |
308 | ||
b1d67693 | 309 | cmdinfo->state |= direction | SUBMIT_STATUS_URB; |
115bb1ff MW |
310 | err = uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_ATOMIC); |
311 | if (err) { | |
1bf8198e | 312 | uas_add_work(cmdinfo); |
115bb1ff MW |
313 | } |
314 | } | |
315 | ||
316 | static void uas_stat_cmplt(struct urb *urb) | |
317 | { | |
318 | struct iu *iu = urb->transfer_buffer; | |
22188f4a | 319 | struct Scsi_Host *shost = urb->context; |
21fc05b6 | 320 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
115bb1ff | 321 | struct scsi_cmnd *cmnd; |
b1d67693 | 322 | struct uas_cmd_info *cmdinfo; |
e0648520 | 323 | unsigned long flags; |
115bb1ff MW |
324 | u16 tag; |
325 | ||
326 | if (urb->status) { | |
326349f8 GH |
327 | if (urb->status == -ENOENT) { |
328 | dev_err(&urb->dev->dev, "stat urb: killed, stream %d\n", | |
329 | urb->stream_id); | |
330 | } else { | |
331 | dev_err(&urb->dev->dev, "stat urb: status %d\n", | |
332 | urb->status); | |
333 | } | |
db32de11 | 334 | usb_free_urb(urb); |
115bb1ff MW |
335 | return; |
336 | } | |
337 | ||
023b515e GH |
338 | if (devinfo->resetting) { |
339 | usb_free_urb(urb); | |
340 | return; | |
341 | } | |
342 | ||
e0648520 | 343 | spin_lock_irqsave(&devinfo->lock, flags); |
115bb1ff | 344 | tag = be16_to_cpup(&iu->tag) - 1; |
22188f4a SAS |
345 | if (tag == 0) |
346 | cmnd = devinfo->cmnd; | |
115bb1ff | 347 | else |
22188f4a | 348 | cmnd = scsi_host_find_tag(shost, tag - 1); |
e0423dee | 349 | |
96c1eb98 | 350 | if (!cmnd) { |
e0423dee | 351 | if (iu->iu_id == IU_ID_RESPONSE) { |
b83b86a3 HG |
352 | if (!devinfo->running_task) |
353 | dev_warn(&urb->dev->dev, | |
354 | "stat urb: recv unexpected response iu\n"); | |
e0423dee GH |
355 | /* store results for uas_eh_task_mgmt() */ |
356 | memcpy(&devinfo->response, iu, sizeof(devinfo->response)); | |
023b515e | 357 | } |
e0423dee GH |
358 | usb_free_urb(urb); |
359 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
360 | return; | |
96c1eb98 | 361 | } |
115bb1ff | 362 | |
e0423dee | 363 | cmdinfo = (void *)&cmnd->SCp; |
115bb1ff MW |
364 | switch (iu->iu_id) { |
365 | case IU_ID_STATUS: | |
22188f4a SAS |
366 | if (devinfo->cmnd == cmnd) |
367 | devinfo->cmnd = NULL; | |
368 | ||
115bb1ff MW |
369 | if (urb->actual_length < 16) |
370 | devinfo->uas_sense_old = 1; | |
371 | if (devinfo->uas_sense_old) | |
372 | uas_sense_old(urb, cmnd); | |
373 | else | |
374 | uas_sense(urb, cmnd); | |
8aac863e GH |
375 | if (cmnd->result != 0) { |
376 | /* cancel data transfers on error */ | |
7e50e0be | 377 | uas_unlink_data_urbs(devinfo, cmdinfo, &flags); |
8aac863e | 378 | } |
b1d67693 GH |
379 | cmdinfo->state &= ~COMMAND_INFLIGHT; |
380 | uas_try_complete(cmnd, __func__); | |
115bb1ff MW |
381 | break; |
382 | case IU_ID_READ_READY: | |
8e453155 HG |
383 | if (!cmdinfo->data_in_urb || |
384 | (cmdinfo->state & DATA_IN_URB_INFLIGHT)) { | |
385 | scmd_printk(KERN_ERR, cmnd, "unexpected read rdy\n"); | |
386 | break; | |
387 | } | |
115bb1ff MW |
388 | uas_xfer_data(urb, cmnd, SUBMIT_DATA_IN_URB); |
389 | break; | |
390 | case IU_ID_WRITE_READY: | |
8e453155 HG |
391 | if (!cmdinfo->data_out_urb || |
392 | (cmdinfo->state & DATA_OUT_URB_INFLIGHT)) { | |
393 | scmd_printk(KERN_ERR, cmnd, "unexpected write rdy\n"); | |
394 | break; | |
395 | } | |
115bb1ff MW |
396 | uas_xfer_data(urb, cmnd, SUBMIT_DATA_OUT_URB); |
397 | break; | |
398 | default: | |
399 | scmd_printk(KERN_ERR, cmnd, | |
400 | "Bogus IU (%d) received on status pipe\n", iu->iu_id); | |
401 | } | |
e9bd7e1a | 402 | usb_free_urb(urb); |
e0648520 | 403 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
404 | } |
405 | ||
c621a81e | 406 | static void uas_data_cmplt(struct urb *urb) |
115bb1ff | 407 | { |
b1d67693 GH |
408 | struct scsi_cmnd *cmnd = urb->context; |
409 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
e0648520 | 410 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
b1d67693 | 411 | struct scsi_data_buffer *sdb = NULL; |
e0648520 | 412 | unsigned long flags; |
b1d67693 | 413 | |
e0648520 | 414 | spin_lock_irqsave(&devinfo->lock, flags); |
b1d67693 GH |
415 | if (cmdinfo->data_in_urb == urb) { |
416 | sdb = scsi_in(cmnd); | |
417 | cmdinfo->state &= ~DATA_IN_URB_INFLIGHT; | |
418 | } else if (cmdinfo->data_out_urb == urb) { | |
419 | sdb = scsi_out(cmnd); | |
420 | cmdinfo->state &= ~DATA_OUT_URB_INFLIGHT; | |
421 | } | |
f491ecbb GH |
422 | if (sdb == NULL) { |
423 | WARN_ON_ONCE(1); | |
424 | } else if (urb->status) { | |
876285cc HG |
425 | if (urb->status != -ECONNRESET) { |
426 | uas_log_cmd_state(cmnd, __func__); | |
427 | scmd_printk(KERN_ERR, cmnd, | |
428 | "data cmplt err %d stream %d\n", | |
429 | urb->status, urb->stream_id); | |
430 | } | |
8aac863e GH |
431 | /* error: no data transfered */ |
432 | sdb->resid = sdb->length; | |
433 | } else { | |
434 | sdb->resid = sdb->length - urb->actual_length; | |
435 | } | |
b1d67693 | 436 | uas_try_complete(cmnd, __func__); |
e0648520 | 437 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
438 | } |
439 | ||
876285cc HG |
440 | static void uas_cmd_cmplt(struct urb *urb) |
441 | { | |
442 | struct scsi_cmnd *cmnd = urb->context; | |
443 | ||
444 | if (urb->status) { | |
445 | uas_log_cmd_state(cmnd, __func__); | |
446 | scmd_printk(KERN_ERR, cmnd, "cmd cmplt err %d\n", urb->status); | |
447 | } | |
448 | usb_free_urb(urb); | |
449 | } | |
450 | ||
115bb1ff | 451 | static struct urb *uas_alloc_data_urb(struct uas_dev_info *devinfo, gfp_t gfp, |
b1d67693 GH |
452 | unsigned int pipe, u16 stream_id, |
453 | struct scsi_cmnd *cmnd, | |
454 | enum dma_data_direction dir) | |
115bb1ff MW |
455 | { |
456 | struct usb_device *udev = devinfo->udev; | |
457 | struct urb *urb = usb_alloc_urb(0, gfp); | |
b1d67693 GH |
458 | struct scsi_data_buffer *sdb = (dir == DMA_FROM_DEVICE) |
459 | ? scsi_in(cmnd) : scsi_out(cmnd); | |
115bb1ff MW |
460 | |
461 | if (!urb) | |
462 | goto out; | |
b1d67693 GH |
463 | usb_fill_bulk_urb(urb, udev, pipe, NULL, sdb->length, |
464 | uas_data_cmplt, cmnd); | |
c6d4579d | 465 | urb->stream_id = stream_id; |
115bb1ff MW |
466 | urb->num_sgs = udev->bus->sg_tablesize ? sdb->table.nents : 0; |
467 | urb->sg = sdb->table.sgl; | |
468 | out: | |
469 | return urb; | |
470 | } | |
471 | ||
472 | static struct urb *uas_alloc_sense_urb(struct uas_dev_info *devinfo, gfp_t gfp, | |
e9bd7e1a | 473 | struct Scsi_Host *shost, u16 stream_id) |
115bb1ff MW |
474 | { |
475 | struct usb_device *udev = devinfo->udev; | |
476 | struct urb *urb = usb_alloc_urb(0, gfp); | |
477 | struct sense_iu *iu; | |
478 | ||
479 | if (!urb) | |
480 | goto out; | |
481 | ||
ac563cfd | 482 | iu = kzalloc(sizeof(*iu), gfp); |
115bb1ff MW |
483 | if (!iu) |
484 | goto free; | |
485 | ||
486 | usb_fill_bulk_urb(urb, udev, devinfo->status_pipe, iu, sizeof(*iu), | |
e9bd7e1a | 487 | uas_stat_cmplt, shost); |
115bb1ff MW |
488 | urb->stream_id = stream_id; |
489 | urb->transfer_flags |= URB_FREE_BUFFER; | |
490 | out: | |
491 | return urb; | |
492 | free: | |
493 | usb_free_urb(urb); | |
494 | return NULL; | |
495 | } | |
496 | ||
497 | static struct urb *uas_alloc_cmd_urb(struct uas_dev_info *devinfo, gfp_t gfp, | |
a887cd36 | 498 | struct scsi_cmnd *cmnd) |
115bb1ff MW |
499 | { |
500 | struct usb_device *udev = devinfo->udev; | |
501 | struct scsi_device *sdev = cmnd->device; | |
502 | struct urb *urb = usb_alloc_urb(0, gfp); | |
503 | struct command_iu *iu; | |
504 | int len; | |
505 | ||
506 | if (!urb) | |
507 | goto out; | |
508 | ||
509 | len = cmnd->cmd_len - 16; | |
510 | if (len < 0) | |
511 | len = 0; | |
512 | len = ALIGN(len, 4); | |
ac563cfd | 513 | iu = kzalloc(sizeof(*iu) + len, gfp); |
115bb1ff MW |
514 | if (!iu) |
515 | goto free; | |
516 | ||
517 | iu->iu_id = IU_ID_COMMAND; | |
9eb44541 | 518 | if (blk_rq_tagged(cmnd->request)) |
22188f4a | 519 | iu->tag = cpu_to_be16(cmnd->request->tag + 2); |
9eb44541 SS |
520 | else |
521 | iu->tag = cpu_to_be16(1); | |
02e031cb | 522 | iu->prio_attr = UAS_SIMPLE_TAG; |
115bb1ff MW |
523 | iu->len = len; |
524 | int_to_scsilun(sdev->lun, &iu->lun); | |
525 | memcpy(iu->cdb, cmnd->cmnd, cmnd->cmd_len); | |
526 | ||
527 | usb_fill_bulk_urb(urb, udev, devinfo->cmd_pipe, iu, sizeof(*iu) + len, | |
876285cc | 528 | uas_cmd_cmplt, cmnd); |
115bb1ff MW |
529 | urb->transfer_flags |= URB_FREE_BUFFER; |
530 | out: | |
531 | return urb; | |
532 | free: | |
533 | usb_free_urb(urb); | |
534 | return NULL; | |
535 | } | |
536 | ||
023b515e GH |
537 | static int uas_submit_task_urb(struct scsi_cmnd *cmnd, gfp_t gfp, |
538 | u8 function, u16 stream_id) | |
539 | { | |
540 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; | |
541 | struct usb_device *udev = devinfo->udev; | |
542 | struct urb *urb = usb_alloc_urb(0, gfp); | |
543 | struct task_mgmt_iu *iu; | |
544 | int err = -ENOMEM; | |
545 | ||
546 | if (!urb) | |
547 | goto err; | |
548 | ||
549 | iu = kzalloc(sizeof(*iu), gfp); | |
550 | if (!iu) | |
551 | goto err; | |
552 | ||
553 | iu->iu_id = IU_ID_TASK_MGMT; | |
554 | iu->tag = cpu_to_be16(stream_id); | |
555 | int_to_scsilun(cmnd->device->lun, &iu->lun); | |
556 | ||
557 | iu->function = function; | |
558 | switch (function) { | |
559 | case TMF_ABORT_TASK: | |
560 | if (blk_rq_tagged(cmnd->request)) | |
561 | iu->task_tag = cpu_to_be16(cmnd->request->tag + 2); | |
562 | else | |
563 | iu->task_tag = cpu_to_be16(1); | |
564 | break; | |
565 | } | |
566 | ||
567 | usb_fill_bulk_urb(urb, udev, devinfo->cmd_pipe, iu, sizeof(*iu), | |
876285cc | 568 | uas_cmd_cmplt, cmnd); |
023b515e GH |
569 | urb->transfer_flags |= URB_FREE_BUFFER; |
570 | ||
d5f808d3 | 571 | usb_anchor_urb(urb, &devinfo->cmd_urbs); |
023b515e | 572 | err = usb_submit_urb(urb, gfp); |
d5f808d3 HG |
573 | if (err) { |
574 | usb_unanchor_urb(urb); | |
876285cc HG |
575 | uas_log_cmd_state(cmnd, __func__); |
576 | scmd_printk(KERN_ERR, cmnd, "task submission err %d\n", err); | |
023b515e | 577 | goto err; |
d5f808d3 | 578 | } |
023b515e GH |
579 | |
580 | return 0; | |
581 | ||
582 | err: | |
583 | usb_free_urb(urb); | |
584 | return err; | |
585 | } | |
586 | ||
115bb1ff MW |
587 | /* |
588 | * Why should I request the Status IU before sending the Command IU? Spec | |
589 | * says to, but also says the device may receive them in any order. Seems | |
590 | * daft to me. | |
591 | */ | |
592 | ||
876285cc | 593 | static struct urb *uas_submit_sense_urb(struct scsi_cmnd *cmnd, |
70cf0fba | 594 | gfp_t gfp, unsigned int stream) |
115bb1ff | 595 | { |
876285cc | 596 | struct Scsi_Host *shost = cmnd->device->host; |
21fc05b6 | 597 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
e9bd7e1a | 598 | struct urb *urb; |
876285cc | 599 | int err; |
115bb1ff | 600 | |
e9bd7e1a GH |
601 | urb = uas_alloc_sense_urb(devinfo, gfp, shost, stream); |
602 | if (!urb) | |
70cf0fba | 603 | return NULL; |
d5f808d3 | 604 | usb_anchor_urb(urb, &devinfo->sense_urbs); |
876285cc HG |
605 | err = usb_submit_urb(urb, gfp); |
606 | if (err) { | |
d5f808d3 | 607 | usb_unanchor_urb(urb); |
876285cc | 608 | uas_log_cmd_state(cmnd, __func__); |
e9bd7e1a | 609 | shost_printk(KERN_INFO, shost, |
876285cc HG |
610 | "sense urb submission error %d stream %d\n", |
611 | err, stream); | |
e9bd7e1a | 612 | usb_free_urb(urb); |
70cf0fba | 613 | return NULL; |
115bb1ff | 614 | } |
70cf0fba | 615 | return urb; |
e9bd7e1a GH |
616 | } |
617 | ||
618 | static int uas_submit_urbs(struct scsi_cmnd *cmnd, | |
619 | struct uas_dev_info *devinfo, gfp_t gfp) | |
620 | { | |
621 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
70cf0fba | 622 | struct urb *urb; |
876285cc | 623 | int err; |
115bb1ff | 624 | |
f491ecbb | 625 | WARN_ON_ONCE(!spin_is_locked(&devinfo->lock)); |
92a3f767 | 626 | if (cmdinfo->state & SUBMIT_STATUS_URB) { |
876285cc | 627 | urb = uas_submit_sense_urb(cmnd, gfp, cmdinfo->stream); |
70cf0fba HG |
628 | if (!urb) |
629 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
92a3f767 | 630 | cmdinfo->state &= ~SUBMIT_STATUS_URB; |
115bb1ff MW |
631 | } |
632 | ||
633 | if (cmdinfo->state & ALLOC_DATA_IN_URB) { | |
634 | cmdinfo->data_in_urb = uas_alloc_data_urb(devinfo, gfp, | |
c621a81e | 635 | devinfo->data_in_pipe, cmdinfo->stream, |
b1d67693 | 636 | cmnd, DMA_FROM_DEVICE); |
115bb1ff MW |
637 | if (!cmdinfo->data_in_urb) |
638 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
639 | cmdinfo->state &= ~ALLOC_DATA_IN_URB; | |
640 | } | |
641 | ||
642 | if (cmdinfo->state & SUBMIT_DATA_IN_URB) { | |
d5f808d3 | 643 | usb_anchor_urb(cmdinfo->data_in_urb, &devinfo->data_urbs); |
876285cc HG |
644 | err = usb_submit_urb(cmdinfo->data_in_urb, gfp); |
645 | if (err) { | |
d5f808d3 | 646 | usb_unanchor_urb(cmdinfo->data_in_urb); |
876285cc | 647 | uas_log_cmd_state(cmnd, __func__); |
115bb1ff | 648 | scmd_printk(KERN_INFO, cmnd, |
876285cc HG |
649 | "data in urb submission error %d stream %d\n", |
650 | err, cmdinfo->data_in_urb->stream_id); | |
115bb1ff MW |
651 | return SCSI_MLQUEUE_DEVICE_BUSY; |
652 | } | |
653 | cmdinfo->state &= ~SUBMIT_DATA_IN_URB; | |
b1d67693 | 654 | cmdinfo->state |= DATA_IN_URB_INFLIGHT; |
115bb1ff MW |
655 | } |
656 | ||
657 | if (cmdinfo->state & ALLOC_DATA_OUT_URB) { | |
658 | cmdinfo->data_out_urb = uas_alloc_data_urb(devinfo, gfp, | |
c621a81e | 659 | devinfo->data_out_pipe, cmdinfo->stream, |
b1d67693 | 660 | cmnd, DMA_TO_DEVICE); |
115bb1ff MW |
661 | if (!cmdinfo->data_out_urb) |
662 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
663 | cmdinfo->state &= ~ALLOC_DATA_OUT_URB; | |
664 | } | |
665 | ||
666 | if (cmdinfo->state & SUBMIT_DATA_OUT_URB) { | |
d5f808d3 | 667 | usb_anchor_urb(cmdinfo->data_out_urb, &devinfo->data_urbs); |
876285cc HG |
668 | err = usb_submit_urb(cmdinfo->data_out_urb, gfp); |
669 | if (err) { | |
d5f808d3 | 670 | usb_unanchor_urb(cmdinfo->data_out_urb); |
876285cc | 671 | uas_log_cmd_state(cmnd, __func__); |
115bb1ff | 672 | scmd_printk(KERN_INFO, cmnd, |
876285cc HG |
673 | "data out urb submission error %d stream %d\n", |
674 | err, cmdinfo->data_out_urb->stream_id); | |
115bb1ff MW |
675 | return SCSI_MLQUEUE_DEVICE_BUSY; |
676 | } | |
677 | cmdinfo->state &= ~SUBMIT_DATA_OUT_URB; | |
b1d67693 | 678 | cmdinfo->state |= DATA_OUT_URB_INFLIGHT; |
115bb1ff MW |
679 | } |
680 | ||
681 | if (cmdinfo->state & ALLOC_CMD_URB) { | |
a887cd36 | 682 | cmdinfo->cmd_urb = uas_alloc_cmd_urb(devinfo, gfp, cmnd); |
115bb1ff MW |
683 | if (!cmdinfo->cmd_urb) |
684 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
685 | cmdinfo->state &= ~ALLOC_CMD_URB; | |
686 | } | |
687 | ||
688 | if (cmdinfo->state & SUBMIT_CMD_URB) { | |
d5f808d3 | 689 | usb_anchor_urb(cmdinfo->cmd_urb, &devinfo->cmd_urbs); |
876285cc HG |
690 | err = usb_submit_urb(cmdinfo->cmd_urb, gfp); |
691 | if (err) { | |
d5f808d3 | 692 | usb_unanchor_urb(cmdinfo->cmd_urb); |
876285cc | 693 | uas_log_cmd_state(cmnd, __func__); |
115bb1ff | 694 | scmd_printk(KERN_INFO, cmnd, |
876285cc | 695 | "cmd urb submission error %d\n", err); |
115bb1ff MW |
696 | return SCSI_MLQUEUE_DEVICE_BUSY; |
697 | } | |
a0e39e34 | 698 | cmdinfo->cmd_urb = NULL; |
115bb1ff | 699 | cmdinfo->state &= ~SUBMIT_CMD_URB; |
b1d67693 | 700 | cmdinfo->state |= COMMAND_INFLIGHT; |
115bb1ff MW |
701 | } |
702 | ||
703 | return 0; | |
704 | } | |
705 | ||
f281233d | 706 | static int uas_queuecommand_lck(struct scsi_cmnd *cmnd, |
115bb1ff MW |
707 | void (*done)(struct scsi_cmnd *)) |
708 | { | |
709 | struct scsi_device *sdev = cmnd->device; | |
710 | struct uas_dev_info *devinfo = sdev->hostdata; | |
711 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
e0648520 | 712 | unsigned long flags; |
115bb1ff MW |
713 | int err; |
714 | ||
715 | BUILD_BUG_ON(sizeof(struct uas_cmd_info) > sizeof(struct scsi_pointer)); | |
716 | ||
c6f63207 HG |
717 | spin_lock_irqsave(&devinfo->lock, flags); |
718 | ||
f8be6bfc GH |
719 | if (devinfo->resetting) { |
720 | cmnd->result = DID_ERROR << 16; | |
721 | cmnd->scsi_done(cmnd); | |
c6f63207 | 722 | spin_unlock_irqrestore(&devinfo->lock, flags); |
f8be6bfc GH |
723 | return 0; |
724 | } | |
725 | ||
e0648520 GH |
726 | if (devinfo->cmnd) { |
727 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
115bb1ff | 728 | return SCSI_MLQUEUE_DEVICE_BUSY; |
e0648520 | 729 | } |
115bb1ff | 730 | |
3a4462e0 HG |
731 | memset(cmdinfo, 0, sizeof(*cmdinfo)); |
732 | ||
115bb1ff | 733 | if (blk_rq_tagged(cmnd->request)) { |
22188f4a | 734 | cmdinfo->stream = cmnd->request->tag + 2; |
115bb1ff | 735 | } else { |
22188f4a | 736 | devinfo->cmnd = cmnd; |
115bb1ff MW |
737 | cmdinfo->stream = 1; |
738 | } | |
739 | ||
740 | cmnd->scsi_done = done; | |
741 | ||
e9bd7e1a | 742 | cmdinfo->state = SUBMIT_STATUS_URB | |
115bb1ff MW |
743 | ALLOC_CMD_URB | SUBMIT_CMD_URB; |
744 | ||
745 | switch (cmnd->sc_data_direction) { | |
746 | case DMA_FROM_DEVICE: | |
747 | cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB; | |
748 | break; | |
749 | case DMA_BIDIRECTIONAL: | |
750 | cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB; | |
751 | case DMA_TO_DEVICE: | |
752 | cmdinfo->state |= ALLOC_DATA_OUT_URB | SUBMIT_DATA_OUT_URB; | |
753 | case DMA_NONE: | |
754 | break; | |
755 | } | |
756 | ||
757 | if (!devinfo->use_streams) { | |
db32de11 | 758 | cmdinfo->state &= ~(SUBMIT_DATA_IN_URB | SUBMIT_DATA_OUT_URB); |
115bb1ff MW |
759 | cmdinfo->stream = 0; |
760 | } | |
761 | ||
762 | err = uas_submit_urbs(cmnd, devinfo, GFP_ATOMIC); | |
763 | if (err) { | |
764 | /* If we did nothing, give up now */ | |
92a3f767 | 765 | if (cmdinfo->state & SUBMIT_STATUS_URB) { |
e0648520 | 766 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
767 | return SCSI_MLQUEUE_DEVICE_BUSY; |
768 | } | |
1bf8198e | 769 | uas_add_work(cmdinfo); |
115bb1ff MW |
770 | } |
771 | ||
040d1a8f | 772 | list_add_tail(&cmdinfo->list, &devinfo->inflight_list); |
e0648520 | 773 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
774 | return 0; |
775 | } | |
776 | ||
f281233d JG |
777 | static DEF_SCSI_QCMD(uas_queuecommand) |
778 | ||
023b515e GH |
779 | static int uas_eh_task_mgmt(struct scsi_cmnd *cmnd, |
780 | const char *fname, u8 function) | |
115bb1ff | 781 | { |
023b515e | 782 | struct Scsi_Host *shost = cmnd->device->host; |
21fc05b6 | 783 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
d3f7c156 | 784 | u16 tag = devinfo->qdepth; |
e0648520 | 785 | unsigned long flags; |
70cf0fba | 786 | struct urb *sense_urb; |
b83b86a3 | 787 | int result = SUCCESS; |
115bb1ff | 788 | |
e0648520 | 789 | spin_lock_irqsave(&devinfo->lock, flags); |
b83b86a3 | 790 | |
c6f63207 HG |
791 | if (devinfo->resetting) { |
792 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
793 | return FAILED; | |
794 | } | |
795 | ||
b83b86a3 HG |
796 | if (devinfo->running_task) { |
797 | shost_printk(KERN_INFO, shost, | |
798 | "%s: %s: error already running a task\n", | |
799 | __func__, fname); | |
800 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
801 | return FAILED; | |
802 | } | |
803 | ||
804 | devinfo->running_task = 1; | |
023b515e | 805 | memset(&devinfo->response, 0, sizeof(devinfo->response)); |
876285cc | 806 | sense_urb = uas_submit_sense_urb(cmnd, GFP_NOIO, |
f323abcd | 807 | devinfo->use_streams ? tag : 0); |
70cf0fba | 808 | if (!sense_urb) { |
023b515e GH |
809 | shost_printk(KERN_INFO, shost, |
810 | "%s: %s: submit sense urb failed\n", | |
811 | __func__, fname); | |
b83b86a3 | 812 | devinfo->running_task = 0; |
1994ff40 | 813 | spin_unlock_irqrestore(&devinfo->lock, flags); |
023b515e GH |
814 | return FAILED; |
815 | } | |
e36e6493 | 816 | if (uas_submit_task_urb(cmnd, GFP_NOIO, function, tag)) { |
023b515e GH |
817 | shost_printk(KERN_INFO, shost, |
818 | "%s: %s: submit task mgmt urb failed\n", | |
819 | __func__, fname); | |
b83b86a3 | 820 | devinfo->running_task = 0; |
1994ff40 | 821 | spin_unlock_irqrestore(&devinfo->lock, flags); |
70cf0fba | 822 | usb_kill_urb(sense_urb); |
023b515e GH |
823 | return FAILED; |
824 | } | |
e0648520 GH |
825 | spin_unlock_irqrestore(&devinfo->lock, flags); |
826 | ||
827 | if (usb_wait_anchor_empty_timeout(&devinfo->sense_urbs, 3000) == 0) { | |
b83b86a3 HG |
828 | /* |
829 | * Note we deliberately do not clear running_task here. If we | |
830 | * allow new tasks to be submitted, there is no way to figure | |
831 | * out if a received response_iu is for the failed task or for | |
832 | * the new one. A bus-reset will eventually clear running_task. | |
833 | */ | |
023b515e GH |
834 | shost_printk(KERN_INFO, shost, |
835 | "%s: %s timed out\n", __func__, fname); | |
836 | return FAILED; | |
837 | } | |
b83b86a3 HG |
838 | |
839 | spin_lock_irqsave(&devinfo->lock, flags); | |
840 | devinfo->running_task = 0; | |
023b515e GH |
841 | if (be16_to_cpu(devinfo->response.tag) != tag) { |
842 | shost_printk(KERN_INFO, shost, | |
843 | "%s: %s failed (wrong tag %d/%d)\n", __func__, | |
844 | fname, be16_to_cpu(devinfo->response.tag), tag); | |
b83b86a3 HG |
845 | result = FAILED; |
846 | } else if (devinfo->response.response_code != RC_TMF_COMPLETE) { | |
023b515e GH |
847 | shost_printk(KERN_INFO, shost, |
848 | "%s: %s failed (rc 0x%x)\n", __func__, | |
849 | fname, devinfo->response.response_code); | |
b83b86a3 | 850 | result = FAILED; |
023b515e | 851 | } |
b83b86a3 HG |
852 | spin_unlock_irqrestore(&devinfo->lock, flags); |
853 | ||
854 | return result; | |
115bb1ff MW |
855 | } |
856 | ||
023b515e | 857 | static int uas_eh_abort_handler(struct scsi_cmnd *cmnd) |
115bb1ff | 858 | { |
023b515e | 859 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; |
e0648520 GH |
860 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
861 | unsigned long flags; | |
023b515e | 862 | int ret; |
115bb1ff | 863 | |
e0648520 | 864 | spin_lock_irqsave(&devinfo->lock, flags); |
c6f63207 HG |
865 | |
866 | if (devinfo->resetting) { | |
867 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
868 | return FAILED; | |
869 | } | |
870 | ||
673331c8 | 871 | uas_mark_cmd_dead(devinfo, cmdinfo, DID_ABORT, __func__); |
5d390403 GH |
872 | if (cmdinfo->state & COMMAND_INFLIGHT) { |
873 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
874 | ret = uas_eh_task_mgmt(cmnd, "ABORT TASK", TMF_ABORT_TASK); | |
875 | } else { | |
7e50e0be | 876 | uas_unlink_data_urbs(devinfo, cmdinfo, &flags); |
5d390403 GH |
877 | uas_try_complete(cmnd, __func__); |
878 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
879 | ret = SUCCESS; | |
880 | } | |
023b515e | 881 | return ret; |
115bb1ff MW |
882 | } |
883 | ||
023b515e | 884 | static int uas_eh_device_reset_handler(struct scsi_cmnd *cmnd) |
115bb1ff | 885 | { |
023b515e GH |
886 | sdev_printk(KERN_INFO, cmnd->device, "%s\n", __func__); |
887 | return uas_eh_task_mgmt(cmnd, "LOGICAL UNIT RESET", | |
888 | TMF_LOGICAL_UNIT_RESET); | |
115bb1ff MW |
889 | } |
890 | ||
891 | static int uas_eh_bus_reset_handler(struct scsi_cmnd *cmnd) | |
892 | { | |
893 | struct scsi_device *sdev = cmnd->device; | |
894 | struct uas_dev_info *devinfo = sdev->hostdata; | |
895 | struct usb_device *udev = devinfo->udev; | |
023b515e | 896 | int err; |
115bb1ff | 897 | |
be326f4c HG |
898 | err = usb_lock_device_for_reset(udev, devinfo->intf); |
899 | if (err) { | |
900 | shost_printk(KERN_ERR, sdev->host, | |
901 | "%s FAILED to get lock err %d\n", __func__, err); | |
902 | return FAILED; | |
903 | } | |
904 | ||
326349f8 | 905 | shost_printk(KERN_INFO, sdev->host, "%s start\n", __func__); |
023b515e | 906 | devinfo->resetting = 1; |
673331c8 | 907 | uas_abort_inflight(devinfo, DID_RESET, __func__); |
a0e39e34 | 908 | usb_kill_anchored_urbs(&devinfo->cmd_urbs); |
023b515e GH |
909 | usb_kill_anchored_urbs(&devinfo->sense_urbs); |
910 | usb_kill_anchored_urbs(&devinfo->data_urbs); | |
326349f8 | 911 | uas_zap_dead(devinfo); |
023b515e GH |
912 | err = usb_reset_device(udev); |
913 | devinfo->resetting = 0; | |
115bb1ff | 914 | |
be326f4c HG |
915 | usb_unlock_device(udev); |
916 | ||
023b515e GH |
917 | if (err) { |
918 | shost_printk(KERN_INFO, sdev->host, "%s FAILED\n", __func__); | |
919 | return FAILED; | |
920 | } | |
115bb1ff | 921 | |
023b515e GH |
922 | shost_printk(KERN_INFO, sdev->host, "%s success\n", __func__); |
923 | return SUCCESS; | |
115bb1ff MW |
924 | } |
925 | ||
926 | static int uas_slave_alloc(struct scsi_device *sdev) | |
927 | { | |
21fc05b6 | 928 | sdev->hostdata = (void *)sdev->host->hostdata; |
37599f96 HG |
929 | |
930 | /* USB has unusual DMA-alignment requirements: Although the | |
931 | * starting address of each scatter-gather element doesn't matter, | |
932 | * the length of each element except the last must be divisible | |
933 | * by the Bulk maxpacket value. There's currently no way to | |
934 | * express this by block-layer constraints, so we'll cop out | |
935 | * and simply require addresses to be aligned at 512-byte | |
936 | * boundaries. This is okay since most block I/O involves | |
937 | * hardware sectors that are multiples of 512 bytes in length, | |
938 | * and since host controllers up through USB 2.0 have maxpacket | |
939 | * values no larger than 512. | |
940 | * | |
941 | * But it doesn't suffice for Wireless USB, where Bulk maxpacket | |
942 | * values can be as large as 2048. To make that work properly | |
943 | * will require changes to the block layer. | |
944 | */ | |
945 | blk_queue_update_dma_alignment(sdev->request_queue, (512 - 1)); | |
946 | ||
115bb1ff MW |
947 | return 0; |
948 | } | |
949 | ||
950 | static int uas_slave_configure(struct scsi_device *sdev) | |
951 | { | |
952 | struct uas_dev_info *devinfo = sdev->hostdata; | |
953 | scsi_set_tag_type(sdev, MSG_ORDERED_TAG); | |
d3f7c156 | 954 | scsi_activate_tcq(sdev, devinfo->qdepth - 2); |
115bb1ff MW |
955 | return 0; |
956 | } | |
957 | ||
958 | static struct scsi_host_template uas_host_template = { | |
959 | .module = THIS_MODULE, | |
960 | .name = "uas", | |
961 | .queuecommand = uas_queuecommand, | |
962 | .slave_alloc = uas_slave_alloc, | |
963 | .slave_configure = uas_slave_configure, | |
964 | .eh_abort_handler = uas_eh_abort_handler, | |
965 | .eh_device_reset_handler = uas_eh_device_reset_handler, | |
115bb1ff MW |
966 | .eh_bus_reset_handler = uas_eh_bus_reset_handler, |
967 | .can_queue = 65536, /* Is there a limit on the _host_ ? */ | |
968 | .this_id = -1, | |
969 | .sg_tablesize = SG_NONE, | |
970 | .cmd_per_lun = 1, /* until we override it */ | |
971 | .skip_settle_delay = 1, | |
972 | .ordered_tag = 1, | |
973 | }; | |
974 | ||
79b4c061 HG |
975 | #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \ |
976 | vendorName, productName, useProtocol, useTransport, \ | |
977 | initFunction, flags) \ | |
978 | { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \ | |
979 | .driver_info = (flags) } | |
980 | ||
115bb1ff | 981 | static struct usb_device_id uas_usb_ids[] = { |
79b4c061 | 982 | # include "unusual_uas.h" |
115bb1ff MW |
983 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_BULK) }, |
984 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_UAS) }, | |
985 | /* 0xaa is a prototype device I happen to have access to */ | |
986 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, 0xaa) }, | |
987 | { } | |
988 | }; | |
989 | MODULE_DEVICE_TABLE(usb, uas_usb_ids); | |
990 | ||
79b4c061 HG |
991 | #undef UNUSUAL_DEV |
992 | ||
e1be067b HG |
993 | static int uas_switch_interface(struct usb_device *udev, |
994 | struct usb_interface *intf) | |
995 | { | |
996 | int alt; | |
997 | ||
998 | alt = uas_find_uas_alt_setting(intf); | |
999 | if (alt < 0) | |
1000 | return alt; | |
1001 | ||
1002 | return usb_set_interface(udev, | |
1003 | intf->altsetting[0].desc.bInterfaceNumber, alt); | |
1004 | } | |
1005 | ||
58d51444 | 1006 | static int uas_configure_endpoints(struct uas_dev_info *devinfo) |
34f11e59 HG |
1007 | { |
1008 | struct usb_host_endpoint *eps[4] = { }; | |
1009 | struct usb_device *udev = devinfo->udev; | |
1010 | int r; | |
1011 | ||
1012 | devinfo->uas_sense_old = 0; | |
1013 | devinfo->cmnd = NULL; | |
1014 | ||
1015 | r = uas_find_endpoints(devinfo->intf->cur_altsetting, eps); | |
74d71aec HG |
1016 | if (r) |
1017 | return r; | |
1018 | ||
1019 | devinfo->cmd_pipe = usb_sndbulkpipe(udev, | |
1020 | usb_endpoint_num(&eps[0]->desc)); | |
1021 | devinfo->status_pipe = usb_rcvbulkpipe(udev, | |
1022 | usb_endpoint_num(&eps[1]->desc)); | |
1023 | devinfo->data_in_pipe = usb_rcvbulkpipe(udev, | |
1024 | usb_endpoint_num(&eps[2]->desc)); | |
1025 | devinfo->data_out_pipe = usb_sndbulkpipe(udev, | |
1026 | usb_endpoint_num(&eps[3]->desc)); | |
115bb1ff | 1027 | |
58d51444 | 1028 | if (udev->speed != USB_SPEED_SUPER) { |
115bb1ff MW |
1029 | devinfo->qdepth = 256; |
1030 | devinfo->use_streams = 0; | |
1031 | } else { | |
58d51444 HG |
1032 | devinfo->qdepth = usb_alloc_streams(devinfo->intf, eps + 1, |
1033 | 3, 256, GFP_KERNEL); | |
1034 | if (devinfo->qdepth < 0) | |
1035 | return devinfo->qdepth; | |
115bb1ff MW |
1036 | devinfo->use_streams = 1; |
1037 | } | |
58d51444 HG |
1038 | |
1039 | return 0; | |
115bb1ff MW |
1040 | } |
1041 | ||
dae51546 SAS |
1042 | static void uas_free_streams(struct uas_dev_info *devinfo) |
1043 | { | |
1044 | struct usb_device *udev = devinfo->udev; | |
1045 | struct usb_host_endpoint *eps[3]; | |
1046 | ||
1047 | eps[0] = usb_pipe_endpoint(udev, devinfo->status_pipe); | |
1048 | eps[1] = usb_pipe_endpoint(udev, devinfo->data_in_pipe); | |
1049 | eps[2] = usb_pipe_endpoint(udev, devinfo->data_out_pipe); | |
1050 | usb_free_streams(devinfo->intf, eps, 3, GFP_KERNEL); | |
1051 | } | |
1052 | ||
115bb1ff MW |
1053 | static int uas_probe(struct usb_interface *intf, const struct usb_device_id *id) |
1054 | { | |
6ce8213b HG |
1055 | int result = -ENOMEM; |
1056 | struct Scsi_Host *shost = NULL; | |
115bb1ff MW |
1057 | struct uas_dev_info *devinfo; |
1058 | struct usb_device *udev = interface_to_usbdev(intf); | |
1059 | ||
79b4c061 HG |
1060 | if (!uas_use_uas_driver(intf, id)) |
1061 | return -ENODEV; | |
1062 | ||
89dc2905 MW |
1063 | if (uas_switch_interface(udev, intf)) |
1064 | return -ENODEV; | |
115bb1ff | 1065 | |
21fc05b6 HG |
1066 | shost = scsi_host_alloc(&uas_host_template, |
1067 | sizeof(struct uas_dev_info)); | |
115bb1ff | 1068 | if (!shost) |
6ce8213b | 1069 | goto set_alt0; |
115bb1ff MW |
1070 | |
1071 | shost->max_cmd_len = 16 + 252; | |
1072 | shost->max_id = 1; | |
bde027b4 GH |
1073 | shost->max_lun = 256; |
1074 | shost->max_channel = 0; | |
115bb1ff MW |
1075 | shost->sg_tablesize = udev->bus->sg_tablesize; |
1076 | ||
21fc05b6 | 1077 | devinfo = (struct uas_dev_info *)shost->hostdata; |
115bb1ff MW |
1078 | devinfo->intf = intf; |
1079 | devinfo->udev = udev; | |
023b515e | 1080 | devinfo->resetting = 0; |
b83b86a3 | 1081 | devinfo->running_task = 0; |
da65c2bb | 1082 | devinfo->shutdown = 0; |
a0e39e34 | 1083 | init_usb_anchor(&devinfo->cmd_urbs); |
bdd000fb GH |
1084 | init_usb_anchor(&devinfo->sense_urbs); |
1085 | init_usb_anchor(&devinfo->data_urbs); | |
e0648520 | 1086 | spin_lock_init(&devinfo->lock); |
1bf8198e | 1087 | INIT_WORK(&devinfo->work, uas_do_work); |
61c09ce5 | 1088 | INIT_LIST_HEAD(&devinfo->inflight_list); |
326349f8 | 1089 | INIT_LIST_HEAD(&devinfo->dead_list); |
58d51444 HG |
1090 | |
1091 | result = uas_configure_endpoints(devinfo); | |
1092 | if (result) | |
1093 | goto set_alt0; | |
115bb1ff | 1094 | |
d3f7c156 | 1095 | result = scsi_init_shared_tag_map(shost, devinfo->qdepth - 2); |
115bb1ff | 1096 | if (result) |
6ce8213b | 1097 | goto free_streams; |
dae51546 SAS |
1098 | |
1099 | result = scsi_add_host(shost, &intf->dev); | |
1100 | if (result) | |
6ce8213b | 1101 | goto free_streams; |
dae51546 | 1102 | |
115bb1ff MW |
1103 | scsi_scan_host(shost); |
1104 | usb_set_intfdata(intf, shost); | |
1105 | return result; | |
dae51546 | 1106 | |
6ce8213b | 1107 | free_streams: |
dae51546 | 1108 | uas_free_streams(devinfo); |
6ce8213b HG |
1109 | set_alt0: |
1110 | usb_set_interface(udev, intf->altsetting[0].desc.bInterfaceNumber, 0); | |
115bb1ff MW |
1111 | if (shost) |
1112 | scsi_host_put(shost); | |
1113 | return result; | |
1114 | } | |
1115 | ||
1116 | static int uas_pre_reset(struct usb_interface *intf) | |
1117 | { | |
4de7a373 | 1118 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
21fc05b6 | 1119 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
4de7a373 HG |
1120 | unsigned long flags; |
1121 | ||
da65c2bb HG |
1122 | if (devinfo->shutdown) |
1123 | return 0; | |
1124 | ||
4de7a373 HG |
1125 | /* Block new requests */ |
1126 | spin_lock_irqsave(shost->host_lock, flags); | |
1127 | scsi_block_requests(shost); | |
1128 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1129 | ||
1130 | /* Wait for any pending requests to complete */ | |
1131 | flush_work(&devinfo->work); | |
1132 | if (usb_wait_anchor_empty_timeout(&devinfo->sense_urbs, 5000) == 0) { | |
1133 | shost_printk(KERN_ERR, shost, "%s: timed out\n", __func__); | |
1134 | return 1; | |
1135 | } | |
1136 | ||
1137 | uas_free_streams(devinfo); | |
1138 | ||
115bb1ff MW |
1139 | return 0; |
1140 | } | |
1141 | ||
1142 | static int uas_post_reset(struct usb_interface *intf) | |
1143 | { | |
4de7a373 | 1144 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
21fc05b6 | 1145 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
4de7a373 HG |
1146 | unsigned long flags; |
1147 | ||
da65c2bb HG |
1148 | if (devinfo->shutdown) |
1149 | return 0; | |
1150 | ||
58d51444 HG |
1151 | if (uas_configure_endpoints(devinfo) != 0) { |
1152 | shost_printk(KERN_ERR, shost, | |
1153 | "%s: alloc streams error after reset", __func__); | |
1154 | return 1; | |
1155 | } | |
4de7a373 HG |
1156 | |
1157 | spin_lock_irqsave(shost->host_lock, flags); | |
1158 | scsi_report_bus_reset(shost, 0); | |
1159 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1160 | ||
1161 | scsi_unblock_requests(shost); | |
1162 | ||
115bb1ff MW |
1163 | return 0; |
1164 | } | |
1165 | ||
0df1f663 HG |
1166 | static int uas_suspend(struct usb_interface *intf, pm_message_t message) |
1167 | { | |
1168 | struct Scsi_Host *shost = usb_get_intfdata(intf); | |
21fc05b6 | 1169 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
0df1f663 HG |
1170 | |
1171 | /* Wait for any pending requests to complete */ | |
1172 | flush_work(&devinfo->work); | |
1173 | if (usb_wait_anchor_empty_timeout(&devinfo->sense_urbs, 5000) == 0) { | |
1174 | shost_printk(KERN_ERR, shost, "%s: timed out\n", __func__); | |
1175 | return -ETIME; | |
1176 | } | |
1177 | ||
1178 | return 0; | |
1179 | } | |
1180 | ||
1181 | static int uas_resume(struct usb_interface *intf) | |
1182 | { | |
1183 | return 0; | |
1184 | } | |
1185 | ||
1186 | static int uas_reset_resume(struct usb_interface *intf) | |
1187 | { | |
1188 | struct Scsi_Host *shost = usb_get_intfdata(intf); | |
21fc05b6 | 1189 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
0df1f663 HG |
1190 | unsigned long flags; |
1191 | ||
1192 | if (uas_configure_endpoints(devinfo) != 0) { | |
1193 | shost_printk(KERN_ERR, shost, | |
1194 | "%s: alloc streams error after reset", __func__); | |
1195 | return -EIO; | |
1196 | } | |
1197 | ||
1198 | spin_lock_irqsave(shost->host_lock, flags); | |
1199 | scsi_report_bus_reset(shost, 0); | |
1200 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1201 | ||
1202 | return 0; | |
1203 | } | |
1204 | ||
115bb1ff MW |
1205 | static void uas_disconnect(struct usb_interface *intf) |
1206 | { | |
115bb1ff | 1207 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
21fc05b6 | 1208 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
115bb1ff | 1209 | |
4c456971 | 1210 | devinfo->resetting = 1; |
1bf8198e | 1211 | cancel_work_sync(&devinfo->work); |
673331c8 | 1212 | uas_abort_inflight(devinfo, DID_NO_CONNECT, __func__); |
a0e39e34 | 1213 | usb_kill_anchored_urbs(&devinfo->cmd_urbs); |
bdd000fb GH |
1214 | usb_kill_anchored_urbs(&devinfo->sense_urbs); |
1215 | usb_kill_anchored_urbs(&devinfo->data_urbs); | |
326349f8 | 1216 | uas_zap_dead(devinfo); |
4c456971 | 1217 | scsi_remove_host(shost); |
dae51546 | 1218 | uas_free_streams(devinfo); |
21fc05b6 | 1219 | scsi_host_put(shost); |
115bb1ff MW |
1220 | } |
1221 | ||
da65c2bb HG |
1222 | /* |
1223 | * Put the device back in usb-storage mode on shutdown, as some BIOS-es | |
1224 | * hang on reboot when the device is still in uas mode. Note the reset is | |
1225 | * necessary as some devices won't revert to usb-storage mode without it. | |
1226 | */ | |
1227 | static void uas_shutdown(struct device *dev) | |
1228 | { | |
1229 | struct usb_interface *intf = to_usb_interface(dev); | |
1230 | struct usb_device *udev = interface_to_usbdev(intf); | |
1231 | struct Scsi_Host *shost = usb_get_intfdata(intf); | |
21fc05b6 | 1232 | struct uas_dev_info *devinfo = (struct uas_dev_info *)shost->hostdata; |
da65c2bb HG |
1233 | |
1234 | if (system_state != SYSTEM_RESTART) | |
1235 | return; | |
1236 | ||
1237 | devinfo->shutdown = 1; | |
1238 | uas_free_streams(devinfo); | |
1239 | usb_set_interface(udev, intf->altsetting[0].desc.bInterfaceNumber, 0); | |
1240 | usb_reset_device(udev); | |
1241 | } | |
1242 | ||
115bb1ff MW |
1243 | static struct usb_driver uas_driver = { |
1244 | .name = "uas", | |
1245 | .probe = uas_probe, | |
1246 | .disconnect = uas_disconnect, | |
1247 | .pre_reset = uas_pre_reset, | |
1248 | .post_reset = uas_post_reset, | |
0df1f663 HG |
1249 | .suspend = uas_suspend, |
1250 | .resume = uas_resume, | |
1251 | .reset_resume = uas_reset_resume, | |
da65c2bb | 1252 | .drvwrap.driver.shutdown = uas_shutdown, |
115bb1ff MW |
1253 | .id_table = uas_usb_ids, |
1254 | }; | |
1255 | ||
65db4305 | 1256 | module_usb_driver(uas_driver); |
115bb1ff MW |
1257 | |
1258 | MODULE_LICENSE("GPL"); | |
f50a4968 HG |
1259 | MODULE_AUTHOR( |
1260 | "Hans de Goede <hdegoede@redhat.com>, Matthew Wilcox and Sarah Sharp"); |