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 | * | |
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 | */ | |
31 | struct 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 |
41 | struct 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 | ||
59 | enum { | |
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 */ | |
77 | struct 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 */ | |
88 | static int uas_submit_urbs(struct scsi_cmnd *cmnd, | |
89 | struct uas_dev_info *devinfo, gfp_t gfp); | |
ea9da1c7 | 90 | static void uas_do_work(struct work_struct *work); |
4c456971 | 91 | static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller); |
d89bd835 GH |
92 | static void uas_configure_endpoints(struct uas_dev_info *devinfo); |
93 | static void uas_free_streams(struct uas_dev_info *devinfo); | |
326349f8 | 94 | static 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 | 97 | static 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 |
118 | static 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 |
143 | static 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 |
164 | static 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 |
176 | static 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 |
198 | static 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 | ||
221 | static 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 | ||
244 | static 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 | ||
267 | static 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 | ||
291 | static 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 | ||
304 | static 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 | 381 | static 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 | ||
409 | static 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 | ||
431 | static 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 | ||
456 | static 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 |
496 | static 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 | ||
539 | err: | |
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 |
550 | static 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 | ||
570 | static 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 | 651 | static 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 |
717 | static DEF_SCSI_QCMD(uas_queuecommand) |
718 | ||
023b515e GH |
719 | static 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 | 765 | static 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 | 793 | static 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 | ||
800 | static 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 | |
be326f4c HG |
807 | err = usb_lock_device_for_reset(udev, devinfo->intf); |
808 | if (err) { | |
809 | shost_printk(KERN_ERR, sdev->host, | |
810 | "%s FAILED to get lock err %d\n", __func__, err); | |
811 | return FAILED; | |
812 | } | |
813 | ||
326349f8 | 814 | shost_printk(KERN_INFO, sdev->host, "%s start\n", __func__); |
023b515e | 815 | devinfo->resetting = 1; |
4c456971 | 816 | uas_abort_work(devinfo); |
a0e39e34 | 817 | usb_kill_anchored_urbs(&devinfo->cmd_urbs); |
023b515e GH |
818 | usb_kill_anchored_urbs(&devinfo->sense_urbs); |
819 | usb_kill_anchored_urbs(&devinfo->data_urbs); | |
326349f8 | 820 | uas_zap_dead(devinfo); |
d89bd835 | 821 | uas_free_streams(devinfo); |
023b515e | 822 | err = usb_reset_device(udev); |
d89bd835 GH |
823 | if (!err) |
824 | uas_configure_endpoints(devinfo); | |
023b515e | 825 | devinfo->resetting = 0; |
115bb1ff | 826 | |
be326f4c HG |
827 | usb_unlock_device(udev); |
828 | ||
023b515e GH |
829 | if (err) { |
830 | shost_printk(KERN_INFO, sdev->host, "%s FAILED\n", __func__); | |
831 | return FAILED; | |
832 | } | |
115bb1ff | 833 | |
023b515e GH |
834 | shost_printk(KERN_INFO, sdev->host, "%s success\n", __func__); |
835 | return SUCCESS; | |
115bb1ff MW |
836 | } |
837 | ||
838 | static int uas_slave_alloc(struct scsi_device *sdev) | |
839 | { | |
840 | sdev->hostdata = (void *)sdev->host->hostdata[0]; | |
841 | return 0; | |
842 | } | |
843 | ||
844 | static int uas_slave_configure(struct scsi_device *sdev) | |
845 | { | |
846 | struct uas_dev_info *devinfo = sdev->hostdata; | |
847 | scsi_set_tag_type(sdev, MSG_ORDERED_TAG); | |
03939864 | 848 | scsi_activate_tcq(sdev, devinfo->qdepth - 3); |
115bb1ff MW |
849 | return 0; |
850 | } | |
851 | ||
852 | static struct scsi_host_template uas_host_template = { | |
853 | .module = THIS_MODULE, | |
854 | .name = "uas", | |
855 | .queuecommand = uas_queuecommand, | |
856 | .slave_alloc = uas_slave_alloc, | |
857 | .slave_configure = uas_slave_configure, | |
858 | .eh_abort_handler = uas_eh_abort_handler, | |
859 | .eh_device_reset_handler = uas_eh_device_reset_handler, | |
115bb1ff MW |
860 | .eh_bus_reset_handler = uas_eh_bus_reset_handler, |
861 | .can_queue = 65536, /* Is there a limit on the _host_ ? */ | |
862 | .this_id = -1, | |
863 | .sg_tablesize = SG_NONE, | |
864 | .cmd_per_lun = 1, /* until we override it */ | |
865 | .skip_settle_delay = 1, | |
866 | .ordered_tag = 1, | |
867 | }; | |
868 | ||
869 | static struct usb_device_id uas_usb_ids[] = { | |
870 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_BULK) }, | |
871 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_UAS) }, | |
872 | /* 0xaa is a prototype device I happen to have access to */ | |
873 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, 0xaa) }, | |
874 | { } | |
875 | }; | |
876 | MODULE_DEVICE_TABLE(usb, uas_usb_ids); | |
877 | ||
89dc2905 MW |
878 | static int uas_is_interface(struct usb_host_interface *intf) |
879 | { | |
880 | return (intf->desc.bInterfaceClass == USB_CLASS_MASS_STORAGE && | |
881 | intf->desc.bInterfaceSubClass == USB_SC_SCSI && | |
882 | intf->desc.bInterfaceProtocol == USB_PR_UAS); | |
883 | } | |
884 | ||
c898add5 SAS |
885 | static int uas_isnt_supported(struct usb_device *udev) |
886 | { | |
887 | struct usb_hcd *hcd = bus_to_hcd(udev->bus); | |
888 | ||
889 | dev_warn(&udev->dev, "The driver for the USB controller %s does not " | |
890 | "support scatter-gather which is\n", | |
891 | hcd->driver->description); | |
892 | dev_warn(&udev->dev, "required by the UAS driver. Please try an" | |
893 | "alternative USB controller if you wish to use UAS.\n"); | |
894 | return -ENODEV; | |
895 | } | |
896 | ||
89dc2905 MW |
897 | static int uas_switch_interface(struct usb_device *udev, |
898 | struct usb_interface *intf) | |
899 | { | |
900 | int i; | |
c898add5 | 901 | int sg_supported = udev->bus->sg_tablesize != 0; |
89dc2905 MW |
902 | |
903 | for (i = 0; i < intf->num_altsetting; i++) { | |
904 | struct usb_host_interface *alt = &intf->altsetting[i]; | |
c898add5 SAS |
905 | |
906 | if (uas_is_interface(alt)) { | |
907 | if (!sg_supported) | |
908 | return uas_isnt_supported(udev); | |
89dc2905 MW |
909 | return usb_set_interface(udev, |
910 | alt->desc.bInterfaceNumber, | |
911 | alt->desc.bAlternateSetting); | |
c898add5 | 912 | } |
89dc2905 MW |
913 | } |
914 | ||
915 | return -ENODEV; | |
916 | } | |
917 | ||
115bb1ff MW |
918 | static void uas_configure_endpoints(struct uas_dev_info *devinfo) |
919 | { | |
920 | struct usb_host_endpoint *eps[4] = { }; | |
921 | struct usb_interface *intf = devinfo->intf; | |
922 | struct usb_device *udev = devinfo->udev; | |
923 | struct usb_host_endpoint *endpoint = intf->cur_altsetting->endpoint; | |
924 | unsigned i, n_endpoints = intf->cur_altsetting->desc.bNumEndpoints; | |
925 | ||
926 | devinfo->uas_sense_old = 0; | |
22188f4a | 927 | devinfo->cmnd = NULL; |
115bb1ff MW |
928 | |
929 | for (i = 0; i < n_endpoints; i++) { | |
930 | unsigned char *extra = endpoint[i].extra; | |
931 | int len = endpoint[i].extralen; | |
932 | while (len > 1) { | |
933 | if (extra[1] == USB_DT_PIPE_USAGE) { | |
934 | unsigned pipe_id = extra[2]; | |
935 | if (pipe_id > 0 && pipe_id < 5) | |
936 | eps[pipe_id - 1] = &endpoint[i]; | |
937 | break; | |
938 | } | |
939 | len -= extra[0]; | |
940 | extra += extra[0]; | |
941 | } | |
942 | } | |
943 | ||
944 | /* | |
945 | * Assume that if we didn't find a control pipe descriptor, we're | |
946 | * using a device with old firmware that happens to be set up like | |
947 | * this. | |
948 | */ | |
949 | if (!eps[0]) { | |
950 | devinfo->cmd_pipe = usb_sndbulkpipe(udev, 1); | |
951 | devinfo->status_pipe = usb_rcvbulkpipe(udev, 1); | |
952 | devinfo->data_in_pipe = usb_rcvbulkpipe(udev, 2); | |
953 | devinfo->data_out_pipe = usb_sndbulkpipe(udev, 2); | |
954 | ||
955 | eps[1] = usb_pipe_endpoint(udev, devinfo->status_pipe); | |
956 | eps[2] = usb_pipe_endpoint(udev, devinfo->data_in_pipe); | |
957 | eps[3] = usb_pipe_endpoint(udev, devinfo->data_out_pipe); | |
958 | } else { | |
959 | devinfo->cmd_pipe = usb_sndbulkpipe(udev, | |
6c2334e9 | 960 | usb_endpoint_num(&eps[0]->desc)); |
115bb1ff | 961 | devinfo->status_pipe = usb_rcvbulkpipe(udev, |
6c2334e9 | 962 | usb_endpoint_num(&eps[1]->desc)); |
115bb1ff | 963 | devinfo->data_in_pipe = usb_rcvbulkpipe(udev, |
6c2334e9 | 964 | usb_endpoint_num(&eps[2]->desc)); |
115bb1ff | 965 | devinfo->data_out_pipe = usb_sndbulkpipe(udev, |
6c2334e9 | 966 | usb_endpoint_num(&eps[3]->desc)); |
115bb1ff MW |
967 | } |
968 | ||
969 | devinfo->qdepth = usb_alloc_streams(devinfo->intf, eps + 1, 3, 256, | |
970 | GFP_KERNEL); | |
971 | if (devinfo->qdepth < 0) { | |
972 | devinfo->qdepth = 256; | |
973 | devinfo->use_streams = 0; | |
974 | } else { | |
975 | devinfo->use_streams = 1; | |
976 | } | |
977 | } | |
978 | ||
dae51546 SAS |
979 | static void uas_free_streams(struct uas_dev_info *devinfo) |
980 | { | |
981 | struct usb_device *udev = devinfo->udev; | |
982 | struct usb_host_endpoint *eps[3]; | |
983 | ||
984 | eps[0] = usb_pipe_endpoint(udev, devinfo->status_pipe); | |
985 | eps[1] = usb_pipe_endpoint(udev, devinfo->data_in_pipe); | |
986 | eps[2] = usb_pipe_endpoint(udev, devinfo->data_out_pipe); | |
987 | usb_free_streams(devinfo->intf, eps, 3, GFP_KERNEL); | |
988 | } | |
989 | ||
115bb1ff MW |
990 | /* |
991 | * XXX: What I'd like to do here is register a SCSI host for each USB host in | |
992 | * the system. Follow usb-storage's design of registering a SCSI host for | |
993 | * each USB device for the moment. Can implement this by walking up the | |
994 | * USB hierarchy until we find a USB host. | |
995 | */ | |
996 | static int uas_probe(struct usb_interface *intf, const struct usb_device_id *id) | |
997 | { | |
6ce8213b HG |
998 | int result = -ENOMEM; |
999 | struct Scsi_Host *shost = NULL; | |
115bb1ff MW |
1000 | struct uas_dev_info *devinfo; |
1001 | struct usb_device *udev = interface_to_usbdev(intf); | |
1002 | ||
89dc2905 MW |
1003 | if (uas_switch_interface(udev, intf)) |
1004 | return -ENODEV; | |
115bb1ff MW |
1005 | |
1006 | devinfo = kmalloc(sizeof(struct uas_dev_info), GFP_KERNEL); | |
1007 | if (!devinfo) | |
6ce8213b | 1008 | goto set_alt0; |
115bb1ff | 1009 | |
115bb1ff MW |
1010 | shost = scsi_host_alloc(&uas_host_template, sizeof(void *)); |
1011 | if (!shost) | |
6ce8213b | 1012 | goto set_alt0; |
115bb1ff MW |
1013 | |
1014 | shost->max_cmd_len = 16 + 252; | |
1015 | shost->max_id = 1; | |
bde027b4 GH |
1016 | shost->max_lun = 256; |
1017 | shost->max_channel = 0; | |
115bb1ff MW |
1018 | shost->sg_tablesize = udev->bus->sg_tablesize; |
1019 | ||
115bb1ff MW |
1020 | devinfo->intf = intf; |
1021 | devinfo->udev = udev; | |
023b515e | 1022 | devinfo->resetting = 0; |
a0e39e34 | 1023 | init_usb_anchor(&devinfo->cmd_urbs); |
bdd000fb GH |
1024 | init_usb_anchor(&devinfo->sense_urbs); |
1025 | init_usb_anchor(&devinfo->data_urbs); | |
e0648520 | 1026 | spin_lock_init(&devinfo->lock); |
1bf8198e GH |
1027 | INIT_WORK(&devinfo->work, uas_do_work); |
1028 | INIT_LIST_HEAD(&devinfo->work_list); | |
326349f8 | 1029 | INIT_LIST_HEAD(&devinfo->dead_list); |
115bb1ff MW |
1030 | uas_configure_endpoints(devinfo); |
1031 | ||
03939864 | 1032 | result = scsi_init_shared_tag_map(shost, devinfo->qdepth - 3); |
115bb1ff | 1033 | if (result) |
6ce8213b | 1034 | goto free_streams; |
dae51546 SAS |
1035 | |
1036 | result = scsi_add_host(shost, &intf->dev); | |
1037 | if (result) | |
6ce8213b | 1038 | goto free_streams; |
dae51546 | 1039 | |
115bb1ff MW |
1040 | shost->hostdata[0] = (unsigned long)devinfo; |
1041 | ||
115bb1ff MW |
1042 | scsi_scan_host(shost); |
1043 | usb_set_intfdata(intf, shost); | |
1044 | return result; | |
dae51546 | 1045 | |
6ce8213b | 1046 | free_streams: |
dae51546 | 1047 | uas_free_streams(devinfo); |
6ce8213b HG |
1048 | set_alt0: |
1049 | usb_set_interface(udev, intf->altsetting[0].desc.bInterfaceNumber, 0); | |
115bb1ff MW |
1050 | kfree(devinfo); |
1051 | if (shost) | |
1052 | scsi_host_put(shost); | |
1053 | return result; | |
1054 | } | |
1055 | ||
1056 | static int uas_pre_reset(struct usb_interface *intf) | |
1057 | { | |
1058 | /* XXX: Need to return 1 if it's not our device in error handling */ | |
1059 | return 0; | |
1060 | } | |
1061 | ||
1062 | static int uas_post_reset(struct usb_interface *intf) | |
1063 | { | |
1064 | /* XXX: Need to return 1 if it's not our device in error handling */ | |
1065 | return 0; | |
1066 | } | |
1067 | ||
1068 | static void uas_disconnect(struct usb_interface *intf) | |
1069 | { | |
115bb1ff MW |
1070 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
1071 | struct uas_dev_info *devinfo = (void *)shost->hostdata[0]; | |
1072 | ||
4c456971 | 1073 | devinfo->resetting = 1; |
1bf8198e | 1074 | cancel_work_sync(&devinfo->work); |
4c456971 | 1075 | uas_abort_work(devinfo); |
a0e39e34 | 1076 | usb_kill_anchored_urbs(&devinfo->cmd_urbs); |
bdd000fb GH |
1077 | usb_kill_anchored_urbs(&devinfo->sense_urbs); |
1078 | usb_kill_anchored_urbs(&devinfo->data_urbs); | |
326349f8 | 1079 | uas_zap_dead(devinfo); |
4c456971 | 1080 | scsi_remove_host(shost); |
dae51546 | 1081 | uas_free_streams(devinfo); |
115bb1ff MW |
1082 | kfree(devinfo); |
1083 | } | |
1084 | ||
1085 | /* | |
1086 | * XXX: Should this plug into libusual so we can auto-upgrade devices from | |
1087 | * Bulk-Only to UAS? | |
1088 | */ | |
1089 | static struct usb_driver uas_driver = { | |
1090 | .name = "uas", | |
1091 | .probe = uas_probe, | |
1092 | .disconnect = uas_disconnect, | |
1093 | .pre_reset = uas_pre_reset, | |
1094 | .post_reset = uas_post_reset, | |
1095 | .id_table = uas_usb_ids, | |
1096 | }; | |
1097 | ||
65db4305 | 1098 | module_usb_driver(uas_driver); |
115bb1ff MW |
1099 | |
1100 | MODULE_LICENSE("GPL"); | |
1101 | MODULE_AUTHOR("Matthew Wilcox and Sarah Sharp"); |