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> | |
4de7a373 | 21 | #include <scsi/scsi_eh.h> |
115bb1ff MW |
22 | #include <scsi/scsi_dbg.h> |
23 | #include <scsi/scsi_cmnd.h> | |
24 | #include <scsi/scsi_device.h> | |
25 | #include <scsi/scsi_host.h> | |
26 | #include <scsi/scsi_tcq.h> | |
27 | ||
115bb1ff MW |
28 | /* |
29 | * The r00-r01c specs define this version of the SENSE IU data structure. | |
30 | * It's still in use by several different firmware releases. | |
31 | */ | |
32 | struct sense_iu_old { | |
33 | __u8 iu_id; | |
34 | __u8 rsvd1; | |
35 | __be16 tag; | |
36 | __be16 len; | |
37 | __u8 status; | |
38 | __u8 service_response; | |
39 | __u8 sense[SCSI_SENSE_BUFFERSIZE]; | |
40 | }; | |
41 | ||
115bb1ff MW |
42 | struct uas_dev_info { |
43 | struct usb_interface *intf; | |
44 | struct usb_device *udev; | |
a0e39e34 | 45 | struct usb_anchor cmd_urbs; |
bdd000fb GH |
46 | struct usb_anchor sense_urbs; |
47 | struct usb_anchor data_urbs; | |
023b515e | 48 | int qdepth, resetting; |
e52e0314 | 49 | struct response_iu response; |
115bb1ff MW |
50 | unsigned cmd_pipe, status_pipe, data_in_pipe, data_out_pipe; |
51 | unsigned use_streams:1; | |
52 | unsigned uas_sense_old:1; | |
22188f4a | 53 | struct scsi_cmnd *cmnd; |
e0648520 | 54 | spinlock_t lock; |
1bf8198e GH |
55 | struct work_struct work; |
56 | struct list_head work_list; | |
326349f8 | 57 | struct list_head dead_list; |
115bb1ff MW |
58 | }; |
59 | ||
60 | enum { | |
92a3f767 | 61 | SUBMIT_STATUS_URB = (1 << 1), |
115bb1ff MW |
62 | ALLOC_DATA_IN_URB = (1 << 2), |
63 | SUBMIT_DATA_IN_URB = (1 << 3), | |
64 | ALLOC_DATA_OUT_URB = (1 << 4), | |
65 | SUBMIT_DATA_OUT_URB = (1 << 5), | |
66 | ALLOC_CMD_URB = (1 << 6), | |
67 | SUBMIT_CMD_URB = (1 << 7), | |
b1d67693 GH |
68 | COMMAND_INFLIGHT = (1 << 8), |
69 | DATA_IN_URB_INFLIGHT = (1 << 9), | |
70 | DATA_OUT_URB_INFLIGHT = (1 << 10), | |
71 | COMMAND_COMPLETED = (1 << 11), | |
ef018cc9 | 72 | COMMAND_ABORTED = (1 << 12), |
b06e48af | 73 | UNLINK_DATA_URBS = (1 << 13), |
efefecf3 | 74 | IS_IN_WORK_LIST = (1 << 14), |
115bb1ff MW |
75 | }; |
76 | ||
77 | /* Overrides scsi_pointer */ | |
78 | struct uas_cmd_info { | |
79 | unsigned int state; | |
80 | unsigned int stream; | |
81 | struct urb *cmd_urb; | |
115bb1ff MW |
82 | struct urb *data_in_urb; |
83 | struct urb *data_out_urb; | |
1bf8198e | 84 | struct list_head work; |
326349f8 | 85 | struct list_head dead; |
115bb1ff MW |
86 | }; |
87 | ||
88 | /* I hate forward declarations, but I actually have a loop */ | |
89 | static int uas_submit_urbs(struct scsi_cmnd *cmnd, | |
90 | struct uas_dev_info *devinfo, gfp_t gfp); | |
ea9da1c7 | 91 | static void uas_do_work(struct work_struct *work); |
4c456971 | 92 | static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller); |
d89bd835 GH |
93 | static void uas_configure_endpoints(struct uas_dev_info *devinfo); |
94 | static void uas_free_streams(struct uas_dev_info *devinfo); | |
326349f8 | 95 | static void uas_log_cmd_state(struct scsi_cmnd *cmnd, const char *caller); |
115bb1ff | 96 | |
7e50e0be | 97 | /* Must be called with devinfo->lock held, will temporary unlock the lock */ |
aa8f6123 | 98 | static void uas_unlink_data_urbs(struct uas_dev_info *devinfo, |
7e50e0be HG |
99 | struct uas_cmd_info *cmdinfo, |
100 | unsigned long *lock_flags) | |
aa8f6123 | 101 | { |
b06e48af GH |
102 | /* |
103 | * The UNLINK_DATA_URBS flag makes sure uas_try_complete | |
104 | * (called by urb completion) doesn't release cmdinfo | |
105 | * underneath us. | |
106 | */ | |
b06e48af | 107 | cmdinfo->state |= UNLINK_DATA_URBS; |
7e50e0be | 108 | spin_unlock_irqrestore(&devinfo->lock, *lock_flags); |
b06e48af | 109 | |
aa8f6123 GH |
110 | if (cmdinfo->data_in_urb) |
111 | usb_unlink_urb(cmdinfo->data_in_urb); | |
112 | if (cmdinfo->data_out_urb) | |
113 | usb_unlink_urb(cmdinfo->data_out_urb); | |
b06e48af | 114 | |
7e50e0be | 115 | spin_lock_irqsave(&devinfo->lock, *lock_flags); |
b06e48af | 116 | cmdinfo->state &= ~UNLINK_DATA_URBS; |
aa8f6123 GH |
117 | } |
118 | ||
115bb1ff MW |
119 | static void uas_do_work(struct work_struct *work) |
120 | { | |
1bf8198e GH |
121 | struct uas_dev_info *devinfo = |
122 | container_of(work, struct uas_dev_info, work); | |
115bb1ff | 123 | struct uas_cmd_info *cmdinfo; |
ea9da1c7 | 124 | struct uas_cmd_info *temp; |
e0648520 | 125 | unsigned long flags; |
ea9da1c7 | 126 | int err; |
115bb1ff | 127 | |
1bf8198e GH |
128 | spin_lock_irqsave(&devinfo->lock, flags); |
129 | list_for_each_entry_safe(cmdinfo, temp, &devinfo->work_list, work) { | |
115bb1ff | 130 | struct scsi_pointer *scp = (void *)cmdinfo; |
1bf8198e GH |
131 | struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, |
132 | SCp); | |
e0648520 | 133 | err = uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_ATOMIC); |
1bf8198e | 134 | if (!err) { |
efefecf3 | 135 | cmdinfo->state &= ~IS_IN_WORK_LIST; |
1bf8198e GH |
136 | list_del(&cmdinfo->work); |
137 | } else { | |
138 | schedule_work(&devinfo->work); | |
ea9da1c7 | 139 | } |
115bb1ff | 140 | } |
1bf8198e | 141 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
142 | } |
143 | ||
4c456971 GH |
144 | static void uas_abort_work(struct uas_dev_info *devinfo) |
145 | { | |
146 | struct uas_cmd_info *cmdinfo; | |
147 | struct uas_cmd_info *temp; | |
4c456971 GH |
148 | unsigned long flags; |
149 | ||
4c456971 | 150 | spin_lock_irqsave(&devinfo->lock, flags); |
1bf8198e | 151 | list_for_each_entry_safe(cmdinfo, temp, &devinfo->work_list, work) { |
4c456971 | 152 | struct scsi_pointer *scp = (void *)cmdinfo; |
1bf8198e GH |
153 | struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, |
154 | SCp); | |
326349f8 | 155 | uas_log_cmd_state(cmnd, __func__); |
f491ecbb | 156 | WARN_ON_ONCE(cmdinfo->state & COMMAND_ABORTED); |
1bf8198e GH |
157 | cmdinfo->state |= COMMAND_ABORTED; |
158 | cmdinfo->state &= ~IS_IN_WORK_LIST; | |
1bf8198e | 159 | list_del(&cmdinfo->work); |
326349f8 | 160 | list_add_tail(&cmdinfo->dead, &devinfo->dead_list); |
4c456971 GH |
161 | } |
162 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
163 | } | |
164 | ||
1bf8198e GH |
165 | static void uas_add_work(struct uas_cmd_info *cmdinfo) |
166 | { | |
167 | struct scsi_pointer *scp = (void *)cmdinfo; | |
168 | struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, SCp); | |
169 | struct uas_dev_info *devinfo = cmnd->device->hostdata; | |
170 | ||
f491ecbb | 171 | WARN_ON_ONCE(!spin_is_locked(&devinfo->lock)); |
1bf8198e GH |
172 | list_add_tail(&cmdinfo->work, &devinfo->work_list); |
173 | cmdinfo->state |= IS_IN_WORK_LIST; | |
174 | schedule_work(&devinfo->work); | |
175 | } | |
176 | ||
326349f8 GH |
177 | static void uas_zap_dead(struct uas_dev_info *devinfo) |
178 | { | |
179 | struct uas_cmd_info *cmdinfo; | |
180 | struct uas_cmd_info *temp; | |
181 | unsigned long flags; | |
182 | ||
183 | spin_lock_irqsave(&devinfo->lock, flags); | |
184 | list_for_each_entry_safe(cmdinfo, temp, &devinfo->dead_list, dead) { | |
185 | struct scsi_pointer *scp = (void *)cmdinfo; | |
186 | struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, | |
187 | SCp); | |
188 | uas_log_cmd_state(cmnd, __func__); | |
f491ecbb | 189 | WARN_ON_ONCE(!(cmdinfo->state & COMMAND_ABORTED)); |
326349f8 GH |
190 | /* all urbs are killed, clear inflight bits */ |
191 | cmdinfo->state &= ~(COMMAND_INFLIGHT | | |
192 | DATA_IN_URB_INFLIGHT | | |
193 | DATA_OUT_URB_INFLIGHT); | |
194 | uas_try_complete(cmnd, __func__); | |
195 | } | |
196 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
197 | } | |
198 | ||
115bb1ff MW |
199 | static void uas_sense(struct urb *urb, struct scsi_cmnd *cmnd) |
200 | { | |
201 | struct sense_iu *sense_iu = urb->transfer_buffer; | |
202 | struct scsi_device *sdev = cmnd->device; | |
203 | ||
204 | if (urb->actual_length > 16) { | |
205 | unsigned len = be16_to_cpup(&sense_iu->len); | |
206 | if (len + 16 != urb->actual_length) { | |
207 | int newlen = min(len + 16, urb->actual_length) - 16; | |
208 | if (newlen < 0) | |
209 | newlen = 0; | |
210 | sdev_printk(KERN_INFO, sdev, "%s: urb length %d " | |
211 | "disagrees with IU sense data length %d, " | |
212 | "using %d bytes of sense data\n", __func__, | |
213 | urb->actual_length, len, newlen); | |
214 | len = newlen; | |
215 | } | |
216 | memcpy(cmnd->sense_buffer, sense_iu->sense, len); | |
217 | } | |
218 | ||
219 | cmnd->result = sense_iu->status; | |
115bb1ff MW |
220 | } |
221 | ||
222 | static void uas_sense_old(struct urb *urb, struct scsi_cmnd *cmnd) | |
223 | { | |
224 | struct sense_iu_old *sense_iu = urb->transfer_buffer; | |
225 | struct scsi_device *sdev = cmnd->device; | |
226 | ||
227 | if (urb->actual_length > 8) { | |
228 | unsigned len = be16_to_cpup(&sense_iu->len) - 2; | |
229 | if (len + 8 != urb->actual_length) { | |
230 | int newlen = min(len + 8, urb->actual_length) - 8; | |
231 | if (newlen < 0) | |
232 | newlen = 0; | |
233 | sdev_printk(KERN_INFO, sdev, "%s: urb length %d " | |
234 | "disagrees with IU sense data length %d, " | |
235 | "using %d bytes of sense data\n", __func__, | |
236 | urb->actual_length, len, newlen); | |
237 | len = newlen; | |
238 | } | |
239 | memcpy(cmnd->sense_buffer, sense_iu->sense, len); | |
240 | } | |
241 | ||
242 | cmnd->result = sense_iu->status; | |
b1d67693 GH |
243 | } |
244 | ||
245 | static void uas_log_cmd_state(struct scsi_cmnd *cmnd, const char *caller) | |
246 | { | |
247 | struct uas_cmd_info *ci = (void *)&cmnd->SCp; | |
248 | ||
249 | scmd_printk(KERN_INFO, cmnd, "%s %p tag %d, inflight:" | |
efefecf3 | 250 | "%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", |
b1d67693 GH |
251 | caller, cmnd, cmnd->request->tag, |
252 | (ci->state & SUBMIT_STATUS_URB) ? " s-st" : "", | |
253 | (ci->state & ALLOC_DATA_IN_URB) ? " a-in" : "", | |
254 | (ci->state & SUBMIT_DATA_IN_URB) ? " s-in" : "", | |
255 | (ci->state & ALLOC_DATA_OUT_URB) ? " a-out" : "", | |
256 | (ci->state & SUBMIT_DATA_OUT_URB) ? " s-out" : "", | |
257 | (ci->state & ALLOC_CMD_URB) ? " a-cmd" : "", | |
258 | (ci->state & SUBMIT_CMD_URB) ? " s-cmd" : "", | |
259 | (ci->state & COMMAND_INFLIGHT) ? " CMD" : "", | |
260 | (ci->state & DATA_IN_URB_INFLIGHT) ? " IN" : "", | |
261 | (ci->state & DATA_OUT_URB_INFLIGHT) ? " OUT" : "", | |
ef018cc9 | 262 | (ci->state & COMMAND_COMPLETED) ? " done" : "", |
b06e48af | 263 | (ci->state & COMMAND_ABORTED) ? " abort" : "", |
efefecf3 GH |
264 | (ci->state & UNLINK_DATA_URBS) ? " unlink": "", |
265 | (ci->state & IS_IN_WORK_LIST) ? " work" : ""); | |
b1d67693 GH |
266 | } |
267 | ||
268 | static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller) | |
269 | { | |
270 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
e0648520 | 271 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
b1d67693 | 272 | |
f491ecbb | 273 | WARN_ON_ONCE(!spin_is_locked(&devinfo->lock)); |
b1d67693 GH |
274 | if (cmdinfo->state & (COMMAND_INFLIGHT | |
275 | DATA_IN_URB_INFLIGHT | | |
b06e48af GH |
276 | DATA_OUT_URB_INFLIGHT | |
277 | UNLINK_DATA_URBS)) | |
b1d67693 | 278 | return -EBUSY; |
f491ecbb | 279 | WARN_ON_ONCE(cmdinfo->state & COMMAND_COMPLETED); |
b1d67693 GH |
280 | cmdinfo->state |= COMMAND_COMPLETED; |
281 | usb_free_urb(cmdinfo->data_in_urb); | |
282 | usb_free_urb(cmdinfo->data_out_urb); | |
0871d7d8 GH |
283 | if (cmdinfo->state & COMMAND_ABORTED) { |
284 | scmd_printk(KERN_INFO, cmnd, "abort completed\n"); | |
285 | cmnd->result = DID_ABORT << 16; | |
326349f8 | 286 | list_del(&cmdinfo->dead); |
0871d7d8 | 287 | } |
c621a81e | 288 | cmnd->scsi_done(cmnd); |
b1d67693 | 289 | return 0; |
115bb1ff MW |
290 | } |
291 | ||
292 | static void uas_xfer_data(struct urb *urb, struct scsi_cmnd *cmnd, | |
b1d67693 | 293 | unsigned direction) |
115bb1ff MW |
294 | { |
295 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
296 | int err; | |
297 | ||
b1d67693 | 298 | cmdinfo->state |= direction | SUBMIT_STATUS_URB; |
115bb1ff MW |
299 | err = uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_ATOMIC); |
300 | if (err) { | |
1bf8198e | 301 | uas_add_work(cmdinfo); |
115bb1ff MW |
302 | } |
303 | } | |
304 | ||
305 | static void uas_stat_cmplt(struct urb *urb) | |
306 | { | |
307 | struct iu *iu = urb->transfer_buffer; | |
22188f4a SAS |
308 | struct Scsi_Host *shost = urb->context; |
309 | struct uas_dev_info *devinfo = (void *)shost->hostdata[0]; | |
115bb1ff | 310 | struct scsi_cmnd *cmnd; |
b1d67693 | 311 | struct uas_cmd_info *cmdinfo; |
e0648520 | 312 | unsigned long flags; |
115bb1ff MW |
313 | u16 tag; |
314 | ||
315 | if (urb->status) { | |
326349f8 GH |
316 | if (urb->status == -ENOENT) { |
317 | dev_err(&urb->dev->dev, "stat urb: killed, stream %d\n", | |
318 | urb->stream_id); | |
319 | } else { | |
320 | dev_err(&urb->dev->dev, "stat urb: status %d\n", | |
321 | urb->status); | |
322 | } | |
db32de11 | 323 | usb_free_urb(urb); |
115bb1ff MW |
324 | return; |
325 | } | |
326 | ||
023b515e GH |
327 | if (devinfo->resetting) { |
328 | usb_free_urb(urb); | |
329 | return; | |
330 | } | |
331 | ||
e0648520 | 332 | spin_lock_irqsave(&devinfo->lock, flags); |
115bb1ff | 333 | tag = be16_to_cpup(&iu->tag) - 1; |
22188f4a SAS |
334 | if (tag == 0) |
335 | cmnd = devinfo->cmnd; | |
115bb1ff | 336 | else |
22188f4a | 337 | cmnd = scsi_host_find_tag(shost, tag - 1); |
e0423dee | 338 | |
96c1eb98 | 339 | if (!cmnd) { |
e0423dee GH |
340 | if (iu->iu_id == IU_ID_RESPONSE) { |
341 | /* store results for uas_eh_task_mgmt() */ | |
342 | memcpy(&devinfo->response, iu, sizeof(devinfo->response)); | |
023b515e | 343 | } |
e0423dee GH |
344 | usb_free_urb(urb); |
345 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
346 | return; | |
96c1eb98 | 347 | } |
115bb1ff | 348 | |
e0423dee | 349 | cmdinfo = (void *)&cmnd->SCp; |
115bb1ff MW |
350 | switch (iu->iu_id) { |
351 | case IU_ID_STATUS: | |
22188f4a SAS |
352 | if (devinfo->cmnd == cmnd) |
353 | devinfo->cmnd = NULL; | |
354 | ||
115bb1ff MW |
355 | if (urb->actual_length < 16) |
356 | devinfo->uas_sense_old = 1; | |
357 | if (devinfo->uas_sense_old) | |
358 | uas_sense_old(urb, cmnd); | |
359 | else | |
360 | uas_sense(urb, cmnd); | |
8aac863e GH |
361 | if (cmnd->result != 0) { |
362 | /* cancel data transfers on error */ | |
7e50e0be | 363 | uas_unlink_data_urbs(devinfo, cmdinfo, &flags); |
8aac863e | 364 | } |
b1d67693 GH |
365 | cmdinfo->state &= ~COMMAND_INFLIGHT; |
366 | uas_try_complete(cmnd, __func__); | |
115bb1ff MW |
367 | break; |
368 | case IU_ID_READ_READY: | |
369 | uas_xfer_data(urb, cmnd, SUBMIT_DATA_IN_URB); | |
370 | break; | |
371 | case IU_ID_WRITE_READY: | |
372 | uas_xfer_data(urb, cmnd, SUBMIT_DATA_OUT_URB); | |
373 | break; | |
374 | default: | |
375 | scmd_printk(KERN_ERR, cmnd, | |
376 | "Bogus IU (%d) received on status pipe\n", iu->iu_id); | |
377 | } | |
e9bd7e1a | 378 | usb_free_urb(urb); |
e0648520 | 379 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
380 | } |
381 | ||
c621a81e | 382 | static void uas_data_cmplt(struct urb *urb) |
115bb1ff | 383 | { |
b1d67693 GH |
384 | struct scsi_cmnd *cmnd = urb->context; |
385 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
e0648520 | 386 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
b1d67693 | 387 | struct scsi_data_buffer *sdb = NULL; |
e0648520 | 388 | unsigned long flags; |
b1d67693 | 389 | |
e0648520 | 390 | spin_lock_irqsave(&devinfo->lock, flags); |
b1d67693 GH |
391 | if (cmdinfo->data_in_urb == urb) { |
392 | sdb = scsi_in(cmnd); | |
393 | cmdinfo->state &= ~DATA_IN_URB_INFLIGHT; | |
394 | } else if (cmdinfo->data_out_urb == urb) { | |
395 | sdb = scsi_out(cmnd); | |
396 | cmdinfo->state &= ~DATA_OUT_URB_INFLIGHT; | |
397 | } | |
f491ecbb GH |
398 | if (sdb == NULL) { |
399 | WARN_ON_ONCE(1); | |
400 | } else if (urb->status) { | |
8aac863e GH |
401 | /* error: no data transfered */ |
402 | sdb->resid = sdb->length; | |
403 | } else { | |
404 | sdb->resid = sdb->length - urb->actual_length; | |
405 | } | |
b1d67693 | 406 | uas_try_complete(cmnd, __func__); |
e0648520 | 407 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
408 | } |
409 | ||
410 | static struct urb *uas_alloc_data_urb(struct uas_dev_info *devinfo, gfp_t gfp, | |
b1d67693 GH |
411 | unsigned int pipe, u16 stream_id, |
412 | struct scsi_cmnd *cmnd, | |
413 | enum dma_data_direction dir) | |
115bb1ff MW |
414 | { |
415 | struct usb_device *udev = devinfo->udev; | |
416 | struct urb *urb = usb_alloc_urb(0, gfp); | |
b1d67693 GH |
417 | struct scsi_data_buffer *sdb = (dir == DMA_FROM_DEVICE) |
418 | ? scsi_in(cmnd) : scsi_out(cmnd); | |
115bb1ff MW |
419 | |
420 | if (!urb) | |
421 | goto out; | |
b1d67693 GH |
422 | usb_fill_bulk_urb(urb, udev, pipe, NULL, sdb->length, |
423 | uas_data_cmplt, cmnd); | |
c621a81e GH |
424 | if (devinfo->use_streams) |
425 | urb->stream_id = stream_id; | |
115bb1ff MW |
426 | urb->num_sgs = udev->bus->sg_tablesize ? sdb->table.nents : 0; |
427 | urb->sg = sdb->table.sgl; | |
428 | out: | |
429 | return urb; | |
430 | } | |
431 | ||
432 | static struct urb *uas_alloc_sense_urb(struct uas_dev_info *devinfo, gfp_t gfp, | |
e9bd7e1a | 433 | struct Scsi_Host *shost, u16 stream_id) |
115bb1ff MW |
434 | { |
435 | struct usb_device *udev = devinfo->udev; | |
436 | struct urb *urb = usb_alloc_urb(0, gfp); | |
437 | struct sense_iu *iu; | |
438 | ||
439 | if (!urb) | |
440 | goto out; | |
441 | ||
ac563cfd | 442 | iu = kzalloc(sizeof(*iu), gfp); |
115bb1ff MW |
443 | if (!iu) |
444 | goto free; | |
445 | ||
446 | usb_fill_bulk_urb(urb, udev, devinfo->status_pipe, iu, sizeof(*iu), | |
e9bd7e1a | 447 | uas_stat_cmplt, shost); |
115bb1ff MW |
448 | urb->stream_id = stream_id; |
449 | urb->transfer_flags |= URB_FREE_BUFFER; | |
450 | out: | |
451 | return urb; | |
452 | free: | |
453 | usb_free_urb(urb); | |
454 | return NULL; | |
455 | } | |
456 | ||
457 | static struct urb *uas_alloc_cmd_urb(struct uas_dev_info *devinfo, gfp_t gfp, | |
a887cd36 | 458 | struct scsi_cmnd *cmnd) |
115bb1ff MW |
459 | { |
460 | struct usb_device *udev = devinfo->udev; | |
461 | struct scsi_device *sdev = cmnd->device; | |
462 | struct urb *urb = usb_alloc_urb(0, gfp); | |
463 | struct command_iu *iu; | |
464 | int len; | |
465 | ||
466 | if (!urb) | |
467 | goto out; | |
468 | ||
469 | len = cmnd->cmd_len - 16; | |
470 | if (len < 0) | |
471 | len = 0; | |
472 | len = ALIGN(len, 4); | |
ac563cfd | 473 | iu = kzalloc(sizeof(*iu) + len, gfp); |
115bb1ff MW |
474 | if (!iu) |
475 | goto free; | |
476 | ||
477 | iu->iu_id = IU_ID_COMMAND; | |
9eb44541 | 478 | if (blk_rq_tagged(cmnd->request)) |
22188f4a | 479 | iu->tag = cpu_to_be16(cmnd->request->tag + 2); |
9eb44541 SS |
480 | else |
481 | iu->tag = cpu_to_be16(1); | |
02e031cb | 482 | iu->prio_attr = UAS_SIMPLE_TAG; |
115bb1ff MW |
483 | iu->len = len; |
484 | int_to_scsilun(sdev->lun, &iu->lun); | |
485 | memcpy(iu->cdb, cmnd->cmnd, cmnd->cmd_len); | |
486 | ||
487 | usb_fill_bulk_urb(urb, udev, devinfo->cmd_pipe, iu, sizeof(*iu) + len, | |
488 | usb_free_urb, NULL); | |
489 | urb->transfer_flags |= URB_FREE_BUFFER; | |
490 | out: | |
491 | return urb; | |
492 | free: | |
493 | usb_free_urb(urb); | |
494 | return NULL; | |
495 | } | |
496 | ||
023b515e GH |
497 | static int uas_submit_task_urb(struct scsi_cmnd *cmnd, gfp_t gfp, |
498 | u8 function, u16 stream_id) | |
499 | { | |
500 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; | |
501 | struct usb_device *udev = devinfo->udev; | |
502 | struct urb *urb = usb_alloc_urb(0, gfp); | |
503 | struct task_mgmt_iu *iu; | |
504 | int err = -ENOMEM; | |
505 | ||
506 | if (!urb) | |
507 | goto err; | |
508 | ||
509 | iu = kzalloc(sizeof(*iu), gfp); | |
510 | if (!iu) | |
511 | goto err; | |
512 | ||
513 | iu->iu_id = IU_ID_TASK_MGMT; | |
514 | iu->tag = cpu_to_be16(stream_id); | |
515 | int_to_scsilun(cmnd->device->lun, &iu->lun); | |
516 | ||
517 | iu->function = function; | |
518 | switch (function) { | |
519 | case TMF_ABORT_TASK: | |
520 | if (blk_rq_tagged(cmnd->request)) | |
521 | iu->task_tag = cpu_to_be16(cmnd->request->tag + 2); | |
522 | else | |
523 | iu->task_tag = cpu_to_be16(1); | |
524 | break; | |
525 | } | |
526 | ||
527 | usb_fill_bulk_urb(urb, udev, devinfo->cmd_pipe, iu, sizeof(*iu), | |
528 | usb_free_urb, NULL); | |
529 | urb->transfer_flags |= URB_FREE_BUFFER; | |
530 | ||
d5f808d3 | 531 | usb_anchor_urb(urb, &devinfo->cmd_urbs); |
023b515e | 532 | err = usb_submit_urb(urb, gfp); |
d5f808d3 HG |
533 | if (err) { |
534 | usb_unanchor_urb(urb); | |
023b515e | 535 | goto err; |
d5f808d3 | 536 | } |
023b515e GH |
537 | |
538 | return 0; | |
539 | ||
540 | err: | |
541 | usb_free_urb(urb); | |
542 | return err; | |
543 | } | |
544 | ||
115bb1ff MW |
545 | /* |
546 | * Why should I request the Status IU before sending the Command IU? Spec | |
547 | * says to, but also says the device may receive them in any order. Seems | |
548 | * daft to me. | |
549 | */ | |
550 | ||
e9bd7e1a GH |
551 | static int uas_submit_sense_urb(struct Scsi_Host *shost, |
552 | gfp_t gfp, unsigned int stream) | |
115bb1ff | 553 | { |
e9bd7e1a GH |
554 | struct uas_dev_info *devinfo = (void *)shost->hostdata[0]; |
555 | struct urb *urb; | |
115bb1ff | 556 | |
e9bd7e1a GH |
557 | urb = uas_alloc_sense_urb(devinfo, gfp, shost, stream); |
558 | if (!urb) | |
559 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
d5f808d3 | 560 | usb_anchor_urb(urb, &devinfo->sense_urbs); |
e9bd7e1a | 561 | if (usb_submit_urb(urb, gfp)) { |
d5f808d3 | 562 | usb_unanchor_urb(urb); |
e9bd7e1a GH |
563 | shost_printk(KERN_INFO, shost, |
564 | "sense urb submission failure\n"); | |
565 | usb_free_urb(urb); | |
566 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
115bb1ff | 567 | } |
e9bd7e1a GH |
568 | return 0; |
569 | } | |
570 | ||
571 | static int uas_submit_urbs(struct scsi_cmnd *cmnd, | |
572 | struct uas_dev_info *devinfo, gfp_t gfp) | |
573 | { | |
574 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
575 | int err; | |
115bb1ff | 576 | |
f491ecbb | 577 | WARN_ON_ONCE(!spin_is_locked(&devinfo->lock)); |
92a3f767 | 578 | if (cmdinfo->state & SUBMIT_STATUS_URB) { |
e9bd7e1a GH |
579 | err = uas_submit_sense_urb(cmnd->device->host, gfp, |
580 | cmdinfo->stream); | |
581 | if (err) { | |
582 | return err; | |
115bb1ff | 583 | } |
92a3f767 | 584 | cmdinfo->state &= ~SUBMIT_STATUS_URB; |
115bb1ff MW |
585 | } |
586 | ||
587 | if (cmdinfo->state & ALLOC_DATA_IN_URB) { | |
588 | cmdinfo->data_in_urb = uas_alloc_data_urb(devinfo, gfp, | |
c621a81e | 589 | devinfo->data_in_pipe, cmdinfo->stream, |
b1d67693 | 590 | cmnd, DMA_FROM_DEVICE); |
115bb1ff MW |
591 | if (!cmdinfo->data_in_urb) |
592 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
593 | cmdinfo->state &= ~ALLOC_DATA_IN_URB; | |
594 | } | |
595 | ||
596 | if (cmdinfo->state & SUBMIT_DATA_IN_URB) { | |
d5f808d3 | 597 | usb_anchor_urb(cmdinfo->data_in_urb, &devinfo->data_urbs); |
115bb1ff | 598 | if (usb_submit_urb(cmdinfo->data_in_urb, gfp)) { |
d5f808d3 | 599 | usb_unanchor_urb(cmdinfo->data_in_urb); |
115bb1ff MW |
600 | scmd_printk(KERN_INFO, cmnd, |
601 | "data in urb submission failure\n"); | |
602 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
603 | } | |
604 | cmdinfo->state &= ~SUBMIT_DATA_IN_URB; | |
b1d67693 | 605 | cmdinfo->state |= DATA_IN_URB_INFLIGHT; |
115bb1ff MW |
606 | } |
607 | ||
608 | if (cmdinfo->state & ALLOC_DATA_OUT_URB) { | |
609 | cmdinfo->data_out_urb = uas_alloc_data_urb(devinfo, gfp, | |
c621a81e | 610 | devinfo->data_out_pipe, cmdinfo->stream, |
b1d67693 | 611 | cmnd, DMA_TO_DEVICE); |
115bb1ff MW |
612 | if (!cmdinfo->data_out_urb) |
613 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
614 | cmdinfo->state &= ~ALLOC_DATA_OUT_URB; | |
615 | } | |
616 | ||
617 | if (cmdinfo->state & SUBMIT_DATA_OUT_URB) { | |
d5f808d3 | 618 | usb_anchor_urb(cmdinfo->data_out_urb, &devinfo->data_urbs); |
115bb1ff | 619 | if (usb_submit_urb(cmdinfo->data_out_urb, gfp)) { |
d5f808d3 | 620 | usb_unanchor_urb(cmdinfo->data_out_urb); |
115bb1ff MW |
621 | scmd_printk(KERN_INFO, cmnd, |
622 | "data out urb submission failure\n"); | |
623 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
624 | } | |
625 | cmdinfo->state &= ~SUBMIT_DATA_OUT_URB; | |
b1d67693 | 626 | cmdinfo->state |= DATA_OUT_URB_INFLIGHT; |
115bb1ff MW |
627 | } |
628 | ||
629 | if (cmdinfo->state & ALLOC_CMD_URB) { | |
a887cd36 | 630 | cmdinfo->cmd_urb = uas_alloc_cmd_urb(devinfo, gfp, cmnd); |
115bb1ff MW |
631 | if (!cmdinfo->cmd_urb) |
632 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
633 | cmdinfo->state &= ~ALLOC_CMD_URB; | |
634 | } | |
635 | ||
636 | if (cmdinfo->state & SUBMIT_CMD_URB) { | |
d5f808d3 | 637 | usb_anchor_urb(cmdinfo->cmd_urb, &devinfo->cmd_urbs); |
115bb1ff | 638 | if (usb_submit_urb(cmdinfo->cmd_urb, gfp)) { |
d5f808d3 | 639 | usb_unanchor_urb(cmdinfo->cmd_urb); |
115bb1ff MW |
640 | scmd_printk(KERN_INFO, cmnd, |
641 | "cmd urb submission failure\n"); | |
642 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
643 | } | |
a0e39e34 | 644 | cmdinfo->cmd_urb = NULL; |
115bb1ff | 645 | cmdinfo->state &= ~SUBMIT_CMD_URB; |
b1d67693 | 646 | cmdinfo->state |= COMMAND_INFLIGHT; |
115bb1ff MW |
647 | } |
648 | ||
649 | return 0; | |
650 | } | |
651 | ||
f281233d | 652 | static int uas_queuecommand_lck(struct scsi_cmnd *cmnd, |
115bb1ff MW |
653 | void (*done)(struct scsi_cmnd *)) |
654 | { | |
655 | struct scsi_device *sdev = cmnd->device; | |
656 | struct uas_dev_info *devinfo = sdev->hostdata; | |
657 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
e0648520 | 658 | unsigned long flags; |
115bb1ff MW |
659 | int err; |
660 | ||
661 | BUILD_BUG_ON(sizeof(struct uas_cmd_info) > sizeof(struct scsi_pointer)); | |
662 | ||
f8be6bfc GH |
663 | if (devinfo->resetting) { |
664 | cmnd->result = DID_ERROR << 16; | |
665 | cmnd->scsi_done(cmnd); | |
666 | return 0; | |
667 | } | |
668 | ||
e0648520 GH |
669 | spin_lock_irqsave(&devinfo->lock, flags); |
670 | if (devinfo->cmnd) { | |
671 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
115bb1ff | 672 | return SCSI_MLQUEUE_DEVICE_BUSY; |
e0648520 | 673 | } |
115bb1ff MW |
674 | |
675 | if (blk_rq_tagged(cmnd->request)) { | |
22188f4a | 676 | cmdinfo->stream = cmnd->request->tag + 2; |
115bb1ff | 677 | } else { |
22188f4a | 678 | devinfo->cmnd = cmnd; |
115bb1ff MW |
679 | cmdinfo->stream = 1; |
680 | } | |
681 | ||
682 | cmnd->scsi_done = done; | |
683 | ||
e9bd7e1a | 684 | cmdinfo->state = SUBMIT_STATUS_URB | |
115bb1ff MW |
685 | ALLOC_CMD_URB | SUBMIT_CMD_URB; |
686 | ||
687 | switch (cmnd->sc_data_direction) { | |
688 | case DMA_FROM_DEVICE: | |
689 | cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB; | |
690 | break; | |
691 | case DMA_BIDIRECTIONAL: | |
692 | cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB; | |
693 | case DMA_TO_DEVICE: | |
694 | cmdinfo->state |= ALLOC_DATA_OUT_URB | SUBMIT_DATA_OUT_URB; | |
695 | case DMA_NONE: | |
696 | break; | |
697 | } | |
698 | ||
699 | if (!devinfo->use_streams) { | |
db32de11 | 700 | cmdinfo->state &= ~(SUBMIT_DATA_IN_URB | SUBMIT_DATA_OUT_URB); |
115bb1ff MW |
701 | cmdinfo->stream = 0; |
702 | } | |
703 | ||
704 | err = uas_submit_urbs(cmnd, devinfo, GFP_ATOMIC); | |
705 | if (err) { | |
706 | /* If we did nothing, give up now */ | |
92a3f767 | 707 | if (cmdinfo->state & SUBMIT_STATUS_URB) { |
e0648520 | 708 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
709 | return SCSI_MLQUEUE_DEVICE_BUSY; |
710 | } | |
1bf8198e | 711 | uas_add_work(cmdinfo); |
115bb1ff MW |
712 | } |
713 | ||
e0648520 | 714 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
715 | return 0; |
716 | } | |
717 | ||
f281233d JG |
718 | static DEF_SCSI_QCMD(uas_queuecommand) |
719 | ||
023b515e GH |
720 | static int uas_eh_task_mgmt(struct scsi_cmnd *cmnd, |
721 | const char *fname, u8 function) | |
115bb1ff | 722 | { |
023b515e GH |
723 | struct Scsi_Host *shost = cmnd->device->host; |
724 | struct uas_dev_info *devinfo = (void *)shost->hostdata[0]; | |
d3f7c156 | 725 | u16 tag = devinfo->qdepth; |
e0648520 | 726 | unsigned long flags; |
115bb1ff | 727 | |
e0648520 | 728 | spin_lock_irqsave(&devinfo->lock, flags); |
023b515e | 729 | memset(&devinfo->response, 0, sizeof(devinfo->response)); |
e0648520 | 730 | if (uas_submit_sense_urb(shost, GFP_ATOMIC, tag)) { |
023b515e GH |
731 | shost_printk(KERN_INFO, shost, |
732 | "%s: %s: submit sense urb failed\n", | |
733 | __func__, fname); | |
1994ff40 | 734 | spin_unlock_irqrestore(&devinfo->lock, flags); |
023b515e GH |
735 | return FAILED; |
736 | } | |
e0648520 | 737 | if (uas_submit_task_urb(cmnd, GFP_ATOMIC, function, tag)) { |
023b515e GH |
738 | shost_printk(KERN_INFO, shost, |
739 | "%s: %s: submit task mgmt urb failed\n", | |
740 | __func__, fname); | |
1994ff40 | 741 | spin_unlock_irqrestore(&devinfo->lock, flags); |
023b515e GH |
742 | return FAILED; |
743 | } | |
e0648520 GH |
744 | spin_unlock_irqrestore(&devinfo->lock, flags); |
745 | ||
746 | if (usb_wait_anchor_empty_timeout(&devinfo->sense_urbs, 3000) == 0) { | |
023b515e GH |
747 | shost_printk(KERN_INFO, shost, |
748 | "%s: %s timed out\n", __func__, fname); | |
749 | return FAILED; | |
750 | } | |
751 | if (be16_to_cpu(devinfo->response.tag) != tag) { | |
752 | shost_printk(KERN_INFO, shost, | |
753 | "%s: %s failed (wrong tag %d/%d)\n", __func__, | |
754 | fname, be16_to_cpu(devinfo->response.tag), tag); | |
755 | return FAILED; | |
756 | } | |
757 | if (devinfo->response.response_code != RC_TMF_COMPLETE) { | |
758 | shost_printk(KERN_INFO, shost, | |
759 | "%s: %s failed (rc 0x%x)\n", __func__, | |
760 | fname, devinfo->response.response_code); | |
761 | return FAILED; | |
762 | } | |
763 | return SUCCESS; | |
115bb1ff MW |
764 | } |
765 | ||
023b515e | 766 | static int uas_eh_abort_handler(struct scsi_cmnd *cmnd) |
115bb1ff | 767 | { |
023b515e | 768 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; |
e0648520 GH |
769 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
770 | unsigned long flags; | |
023b515e | 771 | int ret; |
115bb1ff | 772 | |
023b515e | 773 | uas_log_cmd_state(cmnd, __func__); |
e0648520 | 774 | spin_lock_irqsave(&devinfo->lock, flags); |
f491ecbb | 775 | WARN_ON_ONCE(cmdinfo->state & COMMAND_ABORTED); |
ef018cc9 | 776 | cmdinfo->state |= COMMAND_ABORTED; |
326349f8 | 777 | list_add_tail(&cmdinfo->dead, &devinfo->dead_list); |
5d390403 | 778 | if (cmdinfo->state & IS_IN_WORK_LIST) { |
1bf8198e | 779 | list_del(&cmdinfo->work); |
5d390403 | 780 | cmdinfo->state &= ~IS_IN_WORK_LIST; |
5d390403 GH |
781 | } |
782 | if (cmdinfo->state & COMMAND_INFLIGHT) { | |
783 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
784 | ret = uas_eh_task_mgmt(cmnd, "ABORT TASK", TMF_ABORT_TASK); | |
785 | } else { | |
7e50e0be | 786 | uas_unlink_data_urbs(devinfo, cmdinfo, &flags); |
5d390403 GH |
787 | uas_try_complete(cmnd, __func__); |
788 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
789 | ret = SUCCESS; | |
790 | } | |
023b515e | 791 | return ret; |
115bb1ff MW |
792 | } |
793 | ||
023b515e | 794 | static int uas_eh_device_reset_handler(struct scsi_cmnd *cmnd) |
115bb1ff | 795 | { |
023b515e GH |
796 | sdev_printk(KERN_INFO, cmnd->device, "%s\n", __func__); |
797 | return uas_eh_task_mgmt(cmnd, "LOGICAL UNIT RESET", | |
798 | TMF_LOGICAL_UNIT_RESET); | |
115bb1ff MW |
799 | } |
800 | ||
801 | static int uas_eh_bus_reset_handler(struct scsi_cmnd *cmnd) | |
802 | { | |
803 | struct scsi_device *sdev = cmnd->device; | |
804 | struct uas_dev_info *devinfo = sdev->hostdata; | |
805 | struct usb_device *udev = devinfo->udev; | |
023b515e | 806 | int err; |
115bb1ff | 807 | |
be326f4c HG |
808 | err = usb_lock_device_for_reset(udev, devinfo->intf); |
809 | if (err) { | |
810 | shost_printk(KERN_ERR, sdev->host, | |
811 | "%s FAILED to get lock err %d\n", __func__, err); | |
812 | return FAILED; | |
813 | } | |
814 | ||
326349f8 | 815 | shost_printk(KERN_INFO, sdev->host, "%s start\n", __func__); |
023b515e | 816 | devinfo->resetting = 1; |
4c456971 | 817 | uas_abort_work(devinfo); |
a0e39e34 | 818 | usb_kill_anchored_urbs(&devinfo->cmd_urbs); |
023b515e GH |
819 | usb_kill_anchored_urbs(&devinfo->sense_urbs); |
820 | usb_kill_anchored_urbs(&devinfo->data_urbs); | |
326349f8 | 821 | uas_zap_dead(devinfo); |
023b515e GH |
822 | err = usb_reset_device(udev); |
823 | devinfo->resetting = 0; | |
115bb1ff | 824 | |
be326f4c HG |
825 | usb_unlock_device(udev); |
826 | ||
023b515e GH |
827 | if (err) { |
828 | shost_printk(KERN_INFO, sdev->host, "%s FAILED\n", __func__); | |
829 | return FAILED; | |
830 | } | |
115bb1ff | 831 | |
023b515e GH |
832 | shost_printk(KERN_INFO, sdev->host, "%s success\n", __func__); |
833 | return SUCCESS; | |
115bb1ff MW |
834 | } |
835 | ||
836 | static int uas_slave_alloc(struct scsi_device *sdev) | |
837 | { | |
838 | sdev->hostdata = (void *)sdev->host->hostdata[0]; | |
839 | return 0; | |
840 | } | |
841 | ||
842 | static int uas_slave_configure(struct scsi_device *sdev) | |
843 | { | |
844 | struct uas_dev_info *devinfo = sdev->hostdata; | |
845 | scsi_set_tag_type(sdev, MSG_ORDERED_TAG); | |
d3f7c156 | 846 | scsi_activate_tcq(sdev, devinfo->qdepth - 2); |
115bb1ff MW |
847 | return 0; |
848 | } | |
849 | ||
850 | static struct scsi_host_template uas_host_template = { | |
851 | .module = THIS_MODULE, | |
852 | .name = "uas", | |
853 | .queuecommand = uas_queuecommand, | |
854 | .slave_alloc = uas_slave_alloc, | |
855 | .slave_configure = uas_slave_configure, | |
856 | .eh_abort_handler = uas_eh_abort_handler, | |
857 | .eh_device_reset_handler = uas_eh_device_reset_handler, | |
115bb1ff MW |
858 | .eh_bus_reset_handler = uas_eh_bus_reset_handler, |
859 | .can_queue = 65536, /* Is there a limit on the _host_ ? */ | |
860 | .this_id = -1, | |
861 | .sg_tablesize = SG_NONE, | |
862 | .cmd_per_lun = 1, /* until we override it */ | |
863 | .skip_settle_delay = 1, | |
864 | .ordered_tag = 1, | |
865 | }; | |
866 | ||
867 | static struct usb_device_id uas_usb_ids[] = { | |
868 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_BULK) }, | |
869 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_UAS) }, | |
870 | /* 0xaa is a prototype device I happen to have access to */ | |
871 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, 0xaa) }, | |
872 | { } | |
873 | }; | |
874 | MODULE_DEVICE_TABLE(usb, uas_usb_ids); | |
875 | ||
89dc2905 MW |
876 | static int uas_is_interface(struct usb_host_interface *intf) |
877 | { | |
878 | return (intf->desc.bInterfaceClass == USB_CLASS_MASS_STORAGE && | |
879 | intf->desc.bInterfaceSubClass == USB_SC_SCSI && | |
880 | intf->desc.bInterfaceProtocol == USB_PR_UAS); | |
881 | } | |
882 | ||
c898add5 SAS |
883 | static int uas_isnt_supported(struct usb_device *udev) |
884 | { | |
885 | struct usb_hcd *hcd = bus_to_hcd(udev->bus); | |
886 | ||
887 | dev_warn(&udev->dev, "The driver for the USB controller %s does not " | |
888 | "support scatter-gather which is\n", | |
889 | hcd->driver->description); | |
890 | dev_warn(&udev->dev, "required by the UAS driver. Please try an" | |
891 | "alternative USB controller if you wish to use UAS.\n"); | |
892 | return -ENODEV; | |
893 | } | |
894 | ||
e1be067b | 895 | static int uas_find_uas_alt_setting(struct usb_interface *intf) |
89dc2905 MW |
896 | { |
897 | int i; | |
e1be067b | 898 | struct usb_device *udev = interface_to_usbdev(intf); |
c898add5 | 899 | int sg_supported = udev->bus->sg_tablesize != 0; |
89dc2905 MW |
900 | |
901 | for (i = 0; i < intf->num_altsetting; i++) { | |
902 | struct usb_host_interface *alt = &intf->altsetting[i]; | |
c898add5 SAS |
903 | |
904 | if (uas_is_interface(alt)) { | |
905 | if (!sg_supported) | |
906 | return uas_isnt_supported(udev); | |
e1be067b | 907 | return alt->desc.bAlternateSetting; |
c898add5 | 908 | } |
89dc2905 MW |
909 | } |
910 | ||
911 | return -ENODEV; | |
912 | } | |
913 | ||
e1be067b HG |
914 | static int uas_switch_interface(struct usb_device *udev, |
915 | struct usb_interface *intf) | |
916 | { | |
917 | int alt; | |
918 | ||
919 | alt = uas_find_uas_alt_setting(intf); | |
920 | if (alt < 0) | |
921 | return alt; | |
922 | ||
923 | return usb_set_interface(udev, | |
924 | intf->altsetting[0].desc.bInterfaceNumber, alt); | |
925 | } | |
926 | ||
115bb1ff MW |
927 | static void uas_configure_endpoints(struct uas_dev_info *devinfo) |
928 | { | |
929 | struct usb_host_endpoint *eps[4] = { }; | |
930 | struct usb_interface *intf = devinfo->intf; | |
931 | struct usb_device *udev = devinfo->udev; | |
932 | struct usb_host_endpoint *endpoint = intf->cur_altsetting->endpoint; | |
933 | unsigned i, n_endpoints = intf->cur_altsetting->desc.bNumEndpoints; | |
934 | ||
935 | devinfo->uas_sense_old = 0; | |
22188f4a | 936 | devinfo->cmnd = NULL; |
115bb1ff MW |
937 | |
938 | for (i = 0; i < n_endpoints; i++) { | |
939 | unsigned char *extra = endpoint[i].extra; | |
940 | int len = endpoint[i].extralen; | |
941 | while (len > 1) { | |
942 | if (extra[1] == USB_DT_PIPE_USAGE) { | |
943 | unsigned pipe_id = extra[2]; | |
944 | if (pipe_id > 0 && pipe_id < 5) | |
945 | eps[pipe_id - 1] = &endpoint[i]; | |
946 | break; | |
947 | } | |
948 | len -= extra[0]; | |
949 | extra += extra[0]; | |
950 | } | |
951 | } | |
952 | ||
953 | /* | |
954 | * Assume that if we didn't find a control pipe descriptor, we're | |
955 | * using a device with old firmware that happens to be set up like | |
956 | * this. | |
957 | */ | |
958 | if (!eps[0]) { | |
959 | devinfo->cmd_pipe = usb_sndbulkpipe(udev, 1); | |
960 | devinfo->status_pipe = usb_rcvbulkpipe(udev, 1); | |
961 | devinfo->data_in_pipe = usb_rcvbulkpipe(udev, 2); | |
962 | devinfo->data_out_pipe = usb_sndbulkpipe(udev, 2); | |
963 | ||
964 | eps[1] = usb_pipe_endpoint(udev, devinfo->status_pipe); | |
965 | eps[2] = usb_pipe_endpoint(udev, devinfo->data_in_pipe); | |
966 | eps[3] = usb_pipe_endpoint(udev, devinfo->data_out_pipe); | |
967 | } else { | |
968 | devinfo->cmd_pipe = usb_sndbulkpipe(udev, | |
6c2334e9 | 969 | usb_endpoint_num(&eps[0]->desc)); |
115bb1ff | 970 | devinfo->status_pipe = usb_rcvbulkpipe(udev, |
6c2334e9 | 971 | usb_endpoint_num(&eps[1]->desc)); |
115bb1ff | 972 | devinfo->data_in_pipe = usb_rcvbulkpipe(udev, |
6c2334e9 | 973 | usb_endpoint_num(&eps[2]->desc)); |
115bb1ff | 974 | devinfo->data_out_pipe = usb_sndbulkpipe(udev, |
6c2334e9 | 975 | usb_endpoint_num(&eps[3]->desc)); |
115bb1ff MW |
976 | } |
977 | ||
978 | devinfo->qdepth = usb_alloc_streams(devinfo->intf, eps + 1, 3, 256, | |
979 | GFP_KERNEL); | |
980 | if (devinfo->qdepth < 0) { | |
981 | devinfo->qdepth = 256; | |
982 | devinfo->use_streams = 0; | |
983 | } else { | |
984 | devinfo->use_streams = 1; | |
985 | } | |
986 | } | |
987 | ||
dae51546 SAS |
988 | static void uas_free_streams(struct uas_dev_info *devinfo) |
989 | { | |
990 | struct usb_device *udev = devinfo->udev; | |
991 | struct usb_host_endpoint *eps[3]; | |
992 | ||
993 | eps[0] = usb_pipe_endpoint(udev, devinfo->status_pipe); | |
994 | eps[1] = usb_pipe_endpoint(udev, devinfo->data_in_pipe); | |
995 | eps[2] = usb_pipe_endpoint(udev, devinfo->data_out_pipe); | |
996 | usb_free_streams(devinfo->intf, eps, 3, GFP_KERNEL); | |
997 | } | |
998 | ||
115bb1ff MW |
999 | /* |
1000 | * XXX: What I'd like to do here is register a SCSI host for each USB host in | |
1001 | * the system. Follow usb-storage's design of registering a SCSI host for | |
1002 | * each USB device for the moment. Can implement this by walking up the | |
1003 | * USB hierarchy until we find a USB host. | |
1004 | */ | |
1005 | static int uas_probe(struct usb_interface *intf, const struct usb_device_id *id) | |
1006 | { | |
6ce8213b HG |
1007 | int result = -ENOMEM; |
1008 | struct Scsi_Host *shost = NULL; | |
115bb1ff MW |
1009 | struct uas_dev_info *devinfo; |
1010 | struct usb_device *udev = interface_to_usbdev(intf); | |
1011 | ||
89dc2905 MW |
1012 | if (uas_switch_interface(udev, intf)) |
1013 | return -ENODEV; | |
115bb1ff MW |
1014 | |
1015 | devinfo = kmalloc(sizeof(struct uas_dev_info), GFP_KERNEL); | |
1016 | if (!devinfo) | |
6ce8213b | 1017 | goto set_alt0; |
115bb1ff | 1018 | |
115bb1ff MW |
1019 | shost = scsi_host_alloc(&uas_host_template, sizeof(void *)); |
1020 | if (!shost) | |
6ce8213b | 1021 | goto set_alt0; |
115bb1ff MW |
1022 | |
1023 | shost->max_cmd_len = 16 + 252; | |
1024 | shost->max_id = 1; | |
bde027b4 GH |
1025 | shost->max_lun = 256; |
1026 | shost->max_channel = 0; | |
115bb1ff MW |
1027 | shost->sg_tablesize = udev->bus->sg_tablesize; |
1028 | ||
115bb1ff MW |
1029 | devinfo->intf = intf; |
1030 | devinfo->udev = udev; | |
023b515e | 1031 | devinfo->resetting = 0; |
a0e39e34 | 1032 | init_usb_anchor(&devinfo->cmd_urbs); |
bdd000fb GH |
1033 | init_usb_anchor(&devinfo->sense_urbs); |
1034 | init_usb_anchor(&devinfo->data_urbs); | |
e0648520 | 1035 | spin_lock_init(&devinfo->lock); |
1bf8198e GH |
1036 | INIT_WORK(&devinfo->work, uas_do_work); |
1037 | INIT_LIST_HEAD(&devinfo->work_list); | |
326349f8 | 1038 | INIT_LIST_HEAD(&devinfo->dead_list); |
115bb1ff MW |
1039 | uas_configure_endpoints(devinfo); |
1040 | ||
d3f7c156 | 1041 | result = scsi_init_shared_tag_map(shost, devinfo->qdepth - 2); |
115bb1ff | 1042 | if (result) |
6ce8213b | 1043 | goto free_streams; |
dae51546 SAS |
1044 | |
1045 | result = scsi_add_host(shost, &intf->dev); | |
1046 | if (result) | |
6ce8213b | 1047 | goto free_streams; |
dae51546 | 1048 | |
115bb1ff MW |
1049 | shost->hostdata[0] = (unsigned long)devinfo; |
1050 | ||
115bb1ff MW |
1051 | scsi_scan_host(shost); |
1052 | usb_set_intfdata(intf, shost); | |
1053 | return result; | |
dae51546 | 1054 | |
6ce8213b | 1055 | free_streams: |
dae51546 | 1056 | uas_free_streams(devinfo); |
6ce8213b HG |
1057 | set_alt0: |
1058 | usb_set_interface(udev, intf->altsetting[0].desc.bInterfaceNumber, 0); | |
115bb1ff MW |
1059 | kfree(devinfo); |
1060 | if (shost) | |
1061 | scsi_host_put(shost); | |
1062 | return result; | |
1063 | } | |
1064 | ||
1065 | static int uas_pre_reset(struct usb_interface *intf) | |
1066 | { | |
4de7a373 HG |
1067 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
1068 | struct uas_dev_info *devinfo = (void *)shost->hostdata[0]; | |
1069 | unsigned long flags; | |
1070 | ||
1071 | /* Block new requests */ | |
1072 | spin_lock_irqsave(shost->host_lock, flags); | |
1073 | scsi_block_requests(shost); | |
1074 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1075 | ||
1076 | /* Wait for any pending requests to complete */ | |
1077 | flush_work(&devinfo->work); | |
1078 | if (usb_wait_anchor_empty_timeout(&devinfo->sense_urbs, 5000) == 0) { | |
1079 | shost_printk(KERN_ERR, shost, "%s: timed out\n", __func__); | |
1080 | return 1; | |
1081 | } | |
1082 | ||
1083 | uas_free_streams(devinfo); | |
1084 | ||
115bb1ff MW |
1085 | return 0; |
1086 | } | |
1087 | ||
1088 | static int uas_post_reset(struct usb_interface *intf) | |
1089 | { | |
4de7a373 HG |
1090 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
1091 | struct uas_dev_info *devinfo = (void *)shost->hostdata[0]; | |
1092 | unsigned long flags; | |
1093 | ||
1094 | uas_configure_endpoints(devinfo); | |
1095 | ||
1096 | spin_lock_irqsave(shost->host_lock, flags); | |
1097 | scsi_report_bus_reset(shost, 0); | |
1098 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1099 | ||
1100 | scsi_unblock_requests(shost); | |
1101 | ||
115bb1ff MW |
1102 | return 0; |
1103 | } | |
1104 | ||
1105 | static void uas_disconnect(struct usb_interface *intf) | |
1106 | { | |
115bb1ff MW |
1107 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
1108 | struct uas_dev_info *devinfo = (void *)shost->hostdata[0]; | |
1109 | ||
4c456971 | 1110 | devinfo->resetting = 1; |
1bf8198e | 1111 | cancel_work_sync(&devinfo->work); |
4c456971 | 1112 | uas_abort_work(devinfo); |
a0e39e34 | 1113 | usb_kill_anchored_urbs(&devinfo->cmd_urbs); |
bdd000fb GH |
1114 | usb_kill_anchored_urbs(&devinfo->sense_urbs); |
1115 | usb_kill_anchored_urbs(&devinfo->data_urbs); | |
326349f8 | 1116 | uas_zap_dead(devinfo); |
4c456971 | 1117 | scsi_remove_host(shost); |
dae51546 | 1118 | uas_free_streams(devinfo); |
115bb1ff MW |
1119 | kfree(devinfo); |
1120 | } | |
1121 | ||
1122 | /* | |
1123 | * XXX: Should this plug into libusual so we can auto-upgrade devices from | |
1124 | * Bulk-Only to UAS? | |
1125 | */ | |
1126 | static struct usb_driver uas_driver = { | |
1127 | .name = "uas", | |
1128 | .probe = uas_probe, | |
1129 | .disconnect = uas_disconnect, | |
1130 | .pre_reset = uas_pre_reset, | |
1131 | .post_reset = uas_post_reset, | |
1132 | .id_table = uas_usb_ids, | |
1133 | }; | |
1134 | ||
65db4305 | 1135 | module_usb_driver(uas_driver); |
115bb1ff MW |
1136 | |
1137 | MODULE_LICENSE("GPL"); | |
1138 | MODULE_AUTHOR("Matthew Wilcox and Sarah Sharp"); |