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