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Commit | Line | Data |
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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> |
79b4c061 | 16 | #include <linux/usb_usual.h> |
c898add5 | 17 | #include <linux/usb/hcd.h> |
115bb1ff | 18 | #include <linux/usb/storage.h> |
348748b0 | 19 | #include <linux/usb/uas.h> |
115bb1ff MW |
20 | |
21 | #include <scsi/scsi.h> | |
4de7a373 | 22 | #include <scsi/scsi_eh.h> |
115bb1ff MW |
23 | #include <scsi/scsi_dbg.h> |
24 | #include <scsi/scsi_cmnd.h> | |
25 | #include <scsi/scsi_device.h> | |
26 | #include <scsi/scsi_host.h> | |
27 | #include <scsi/scsi_tcq.h> | |
28 | ||
82aa0387 HG |
29 | #include "uas-detect.h" |
30 | ||
115bb1ff MW |
31 | /* |
32 | * The r00-r01c specs define this version of the SENSE IU data structure. | |
33 | * It's still in use by several different firmware releases. | |
34 | */ | |
35 | struct sense_iu_old { | |
36 | __u8 iu_id; | |
37 | __u8 rsvd1; | |
38 | __be16 tag; | |
39 | __be16 len; | |
40 | __u8 status; | |
41 | __u8 service_response; | |
42 | __u8 sense[SCSI_SENSE_BUFFERSIZE]; | |
43 | }; | |
44 | ||
115bb1ff MW |
45 | struct uas_dev_info { |
46 | struct usb_interface *intf; | |
47 | struct usb_device *udev; | |
a0e39e34 | 48 | struct usb_anchor cmd_urbs; |
bdd000fb GH |
49 | struct usb_anchor sense_urbs; |
50 | struct usb_anchor data_urbs; | |
023b515e | 51 | int qdepth, resetting; |
e52e0314 | 52 | struct response_iu response; |
115bb1ff MW |
53 | unsigned cmd_pipe, status_pipe, data_in_pipe, data_out_pipe; |
54 | unsigned use_streams:1; | |
55 | unsigned uas_sense_old:1; | |
22188f4a | 56 | struct scsi_cmnd *cmnd; |
e0648520 | 57 | spinlock_t lock; |
1bf8198e GH |
58 | struct work_struct work; |
59 | struct list_head work_list; | |
326349f8 | 60 | struct list_head dead_list; |
115bb1ff MW |
61 | }; |
62 | ||
63 | enum { | |
92a3f767 | 64 | SUBMIT_STATUS_URB = (1 << 1), |
115bb1ff MW |
65 | ALLOC_DATA_IN_URB = (1 << 2), |
66 | SUBMIT_DATA_IN_URB = (1 << 3), | |
67 | ALLOC_DATA_OUT_URB = (1 << 4), | |
68 | SUBMIT_DATA_OUT_URB = (1 << 5), | |
69 | ALLOC_CMD_URB = (1 << 6), | |
70 | SUBMIT_CMD_URB = (1 << 7), | |
b1d67693 GH |
71 | COMMAND_INFLIGHT = (1 << 8), |
72 | DATA_IN_URB_INFLIGHT = (1 << 9), | |
73 | DATA_OUT_URB_INFLIGHT = (1 << 10), | |
74 | COMMAND_COMPLETED = (1 << 11), | |
ef018cc9 | 75 | COMMAND_ABORTED = (1 << 12), |
b06e48af | 76 | UNLINK_DATA_URBS = (1 << 13), |
efefecf3 | 77 | IS_IN_WORK_LIST = (1 << 14), |
115bb1ff MW |
78 | }; |
79 | ||
80 | /* Overrides scsi_pointer */ | |
81 | struct uas_cmd_info { | |
82 | unsigned int state; | |
83 | unsigned int stream; | |
84 | struct urb *cmd_urb; | |
115bb1ff MW |
85 | struct urb *data_in_urb; |
86 | struct urb *data_out_urb; | |
1bf8198e | 87 | struct list_head work; |
326349f8 | 88 | struct list_head dead; |
115bb1ff MW |
89 | }; |
90 | ||
91 | /* I hate forward declarations, but I actually have a loop */ | |
92 | static int uas_submit_urbs(struct scsi_cmnd *cmnd, | |
93 | struct uas_dev_info *devinfo, gfp_t gfp); | |
ea9da1c7 | 94 | static void uas_do_work(struct work_struct *work); |
4c456971 | 95 | static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller); |
d89bd835 | 96 | static void uas_free_streams(struct uas_dev_info *devinfo); |
326349f8 | 97 | static void uas_log_cmd_state(struct scsi_cmnd *cmnd, const char *caller); |
115bb1ff | 98 | |
7e50e0be | 99 | /* Must be called with devinfo->lock held, will temporary unlock the lock */ |
aa8f6123 | 100 | static void uas_unlink_data_urbs(struct uas_dev_info *devinfo, |
7e50e0be HG |
101 | struct uas_cmd_info *cmdinfo, |
102 | unsigned long *lock_flags) | |
aa8f6123 | 103 | { |
b06e48af GH |
104 | /* |
105 | * The UNLINK_DATA_URBS flag makes sure uas_try_complete | |
106 | * (called by urb completion) doesn't release cmdinfo | |
107 | * underneath us. | |
108 | */ | |
b06e48af | 109 | cmdinfo->state |= UNLINK_DATA_URBS; |
7e50e0be | 110 | spin_unlock_irqrestore(&devinfo->lock, *lock_flags); |
b06e48af | 111 | |
aa8f6123 GH |
112 | if (cmdinfo->data_in_urb) |
113 | usb_unlink_urb(cmdinfo->data_in_urb); | |
114 | if (cmdinfo->data_out_urb) | |
115 | usb_unlink_urb(cmdinfo->data_out_urb); | |
b06e48af | 116 | |
7e50e0be | 117 | spin_lock_irqsave(&devinfo->lock, *lock_flags); |
b06e48af | 118 | cmdinfo->state &= ~UNLINK_DATA_URBS; |
aa8f6123 GH |
119 | } |
120 | ||
115bb1ff MW |
121 | static void uas_do_work(struct work_struct *work) |
122 | { | |
1bf8198e GH |
123 | struct uas_dev_info *devinfo = |
124 | container_of(work, struct uas_dev_info, work); | |
115bb1ff | 125 | struct uas_cmd_info *cmdinfo; |
ea9da1c7 | 126 | struct uas_cmd_info *temp; |
e0648520 | 127 | unsigned long flags; |
ea9da1c7 | 128 | int err; |
115bb1ff | 129 | |
1bf8198e GH |
130 | spin_lock_irqsave(&devinfo->lock, flags); |
131 | list_for_each_entry_safe(cmdinfo, temp, &devinfo->work_list, work) { | |
115bb1ff | 132 | struct scsi_pointer *scp = (void *)cmdinfo; |
1bf8198e GH |
133 | struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, |
134 | SCp); | |
e0648520 | 135 | err = uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_ATOMIC); |
1bf8198e | 136 | if (!err) { |
efefecf3 | 137 | cmdinfo->state &= ~IS_IN_WORK_LIST; |
1bf8198e GH |
138 | list_del(&cmdinfo->work); |
139 | } else { | |
140 | schedule_work(&devinfo->work); | |
ea9da1c7 | 141 | } |
115bb1ff | 142 | } |
1bf8198e | 143 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
144 | } |
145 | ||
4c456971 GH |
146 | static void uas_abort_work(struct uas_dev_info *devinfo) |
147 | { | |
148 | struct uas_cmd_info *cmdinfo; | |
149 | struct uas_cmd_info *temp; | |
4c456971 GH |
150 | unsigned long flags; |
151 | ||
4c456971 | 152 | spin_lock_irqsave(&devinfo->lock, flags); |
1bf8198e | 153 | list_for_each_entry_safe(cmdinfo, temp, &devinfo->work_list, work) { |
4c456971 | 154 | struct scsi_pointer *scp = (void *)cmdinfo; |
1bf8198e GH |
155 | struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, |
156 | SCp); | |
326349f8 | 157 | uas_log_cmd_state(cmnd, __func__); |
f491ecbb | 158 | WARN_ON_ONCE(cmdinfo->state & COMMAND_ABORTED); |
1bf8198e GH |
159 | cmdinfo->state |= COMMAND_ABORTED; |
160 | cmdinfo->state &= ~IS_IN_WORK_LIST; | |
1bf8198e | 161 | list_del(&cmdinfo->work); |
326349f8 | 162 | list_add_tail(&cmdinfo->dead, &devinfo->dead_list); |
4c456971 GH |
163 | } |
164 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
165 | } | |
166 | ||
1bf8198e GH |
167 | static void uas_add_work(struct uas_cmd_info *cmdinfo) |
168 | { | |
169 | struct scsi_pointer *scp = (void *)cmdinfo; | |
170 | struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, SCp); | |
171 | struct uas_dev_info *devinfo = cmnd->device->hostdata; | |
172 | ||
f491ecbb | 173 | WARN_ON_ONCE(!spin_is_locked(&devinfo->lock)); |
1bf8198e GH |
174 | list_add_tail(&cmdinfo->work, &devinfo->work_list); |
175 | cmdinfo->state |= IS_IN_WORK_LIST; | |
176 | schedule_work(&devinfo->work); | |
177 | } | |
178 | ||
326349f8 GH |
179 | static void uas_zap_dead(struct uas_dev_info *devinfo) |
180 | { | |
181 | struct uas_cmd_info *cmdinfo; | |
182 | struct uas_cmd_info *temp; | |
183 | unsigned long flags; | |
184 | ||
185 | spin_lock_irqsave(&devinfo->lock, flags); | |
186 | list_for_each_entry_safe(cmdinfo, temp, &devinfo->dead_list, dead) { | |
187 | struct scsi_pointer *scp = (void *)cmdinfo; | |
188 | struct scsi_cmnd *cmnd = container_of(scp, struct scsi_cmnd, | |
189 | SCp); | |
190 | uas_log_cmd_state(cmnd, __func__); | |
f491ecbb | 191 | WARN_ON_ONCE(!(cmdinfo->state & COMMAND_ABORTED)); |
326349f8 GH |
192 | /* all urbs are killed, clear inflight bits */ |
193 | cmdinfo->state &= ~(COMMAND_INFLIGHT | | |
194 | DATA_IN_URB_INFLIGHT | | |
195 | DATA_OUT_URB_INFLIGHT); | |
196 | uas_try_complete(cmnd, __func__); | |
197 | } | |
198 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
199 | } | |
200 | ||
115bb1ff MW |
201 | static void uas_sense(struct urb *urb, struct scsi_cmnd *cmnd) |
202 | { | |
203 | struct sense_iu *sense_iu = urb->transfer_buffer; | |
204 | struct scsi_device *sdev = cmnd->device; | |
205 | ||
206 | if (urb->actual_length > 16) { | |
207 | unsigned len = be16_to_cpup(&sense_iu->len); | |
208 | if (len + 16 != urb->actual_length) { | |
209 | int newlen = min(len + 16, urb->actual_length) - 16; | |
210 | if (newlen < 0) | |
211 | newlen = 0; | |
212 | sdev_printk(KERN_INFO, sdev, "%s: urb length %d " | |
213 | "disagrees with IU sense data length %d, " | |
214 | "using %d bytes of sense data\n", __func__, | |
215 | urb->actual_length, len, newlen); | |
216 | len = newlen; | |
217 | } | |
218 | memcpy(cmnd->sense_buffer, sense_iu->sense, len); | |
219 | } | |
220 | ||
221 | cmnd->result = sense_iu->status; | |
115bb1ff MW |
222 | } |
223 | ||
224 | static void uas_sense_old(struct urb *urb, struct scsi_cmnd *cmnd) | |
225 | { | |
226 | struct sense_iu_old *sense_iu = urb->transfer_buffer; | |
227 | struct scsi_device *sdev = cmnd->device; | |
228 | ||
229 | if (urb->actual_length > 8) { | |
230 | unsigned len = be16_to_cpup(&sense_iu->len) - 2; | |
231 | if (len + 8 != urb->actual_length) { | |
232 | int newlen = min(len + 8, urb->actual_length) - 8; | |
233 | if (newlen < 0) | |
234 | newlen = 0; | |
235 | sdev_printk(KERN_INFO, sdev, "%s: urb length %d " | |
236 | "disagrees with IU sense data length %d, " | |
237 | "using %d bytes of sense data\n", __func__, | |
238 | urb->actual_length, len, newlen); | |
239 | len = newlen; | |
240 | } | |
241 | memcpy(cmnd->sense_buffer, sense_iu->sense, len); | |
242 | } | |
243 | ||
244 | cmnd->result = sense_iu->status; | |
b1d67693 GH |
245 | } |
246 | ||
247 | static void uas_log_cmd_state(struct scsi_cmnd *cmnd, const char *caller) | |
248 | { | |
249 | struct uas_cmd_info *ci = (void *)&cmnd->SCp; | |
250 | ||
251 | scmd_printk(KERN_INFO, cmnd, "%s %p tag %d, inflight:" | |
efefecf3 | 252 | "%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", |
b1d67693 GH |
253 | caller, cmnd, cmnd->request->tag, |
254 | (ci->state & SUBMIT_STATUS_URB) ? " s-st" : "", | |
255 | (ci->state & ALLOC_DATA_IN_URB) ? " a-in" : "", | |
256 | (ci->state & SUBMIT_DATA_IN_URB) ? " s-in" : "", | |
257 | (ci->state & ALLOC_DATA_OUT_URB) ? " a-out" : "", | |
258 | (ci->state & SUBMIT_DATA_OUT_URB) ? " s-out" : "", | |
259 | (ci->state & ALLOC_CMD_URB) ? " a-cmd" : "", | |
260 | (ci->state & SUBMIT_CMD_URB) ? " s-cmd" : "", | |
261 | (ci->state & COMMAND_INFLIGHT) ? " CMD" : "", | |
262 | (ci->state & DATA_IN_URB_INFLIGHT) ? " IN" : "", | |
263 | (ci->state & DATA_OUT_URB_INFLIGHT) ? " OUT" : "", | |
ef018cc9 | 264 | (ci->state & COMMAND_COMPLETED) ? " done" : "", |
b06e48af | 265 | (ci->state & COMMAND_ABORTED) ? " abort" : "", |
efefecf3 GH |
266 | (ci->state & UNLINK_DATA_URBS) ? " unlink": "", |
267 | (ci->state & IS_IN_WORK_LIST) ? " work" : ""); | |
b1d67693 GH |
268 | } |
269 | ||
270 | static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller) | |
271 | { | |
272 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
e0648520 | 273 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
b1d67693 | 274 | |
f491ecbb | 275 | WARN_ON_ONCE(!spin_is_locked(&devinfo->lock)); |
b1d67693 GH |
276 | if (cmdinfo->state & (COMMAND_INFLIGHT | |
277 | DATA_IN_URB_INFLIGHT | | |
b06e48af GH |
278 | DATA_OUT_URB_INFLIGHT | |
279 | UNLINK_DATA_URBS)) | |
b1d67693 | 280 | return -EBUSY; |
f491ecbb | 281 | WARN_ON_ONCE(cmdinfo->state & COMMAND_COMPLETED); |
b1d67693 GH |
282 | cmdinfo->state |= COMMAND_COMPLETED; |
283 | usb_free_urb(cmdinfo->data_in_urb); | |
284 | usb_free_urb(cmdinfo->data_out_urb); | |
0871d7d8 GH |
285 | if (cmdinfo->state & COMMAND_ABORTED) { |
286 | scmd_printk(KERN_INFO, cmnd, "abort completed\n"); | |
287 | cmnd->result = DID_ABORT << 16; | |
326349f8 | 288 | list_del(&cmdinfo->dead); |
0871d7d8 | 289 | } |
c621a81e | 290 | cmnd->scsi_done(cmnd); |
b1d67693 | 291 | return 0; |
115bb1ff MW |
292 | } |
293 | ||
294 | static void uas_xfer_data(struct urb *urb, struct scsi_cmnd *cmnd, | |
b1d67693 | 295 | unsigned direction) |
115bb1ff MW |
296 | { |
297 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
298 | int err; | |
299 | ||
b1d67693 | 300 | cmdinfo->state |= direction | SUBMIT_STATUS_URB; |
115bb1ff MW |
301 | err = uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_ATOMIC); |
302 | if (err) { | |
1bf8198e | 303 | uas_add_work(cmdinfo); |
115bb1ff MW |
304 | } |
305 | } | |
306 | ||
307 | static void uas_stat_cmplt(struct urb *urb) | |
308 | { | |
309 | struct iu *iu = urb->transfer_buffer; | |
22188f4a SAS |
310 | struct Scsi_Host *shost = urb->context; |
311 | struct uas_dev_info *devinfo = (void *)shost->hostdata[0]; | |
115bb1ff | 312 | struct scsi_cmnd *cmnd; |
b1d67693 | 313 | struct uas_cmd_info *cmdinfo; |
e0648520 | 314 | unsigned long flags; |
115bb1ff MW |
315 | u16 tag; |
316 | ||
317 | if (urb->status) { | |
326349f8 GH |
318 | if (urb->status == -ENOENT) { |
319 | dev_err(&urb->dev->dev, "stat urb: killed, stream %d\n", | |
320 | urb->stream_id); | |
321 | } else { | |
322 | dev_err(&urb->dev->dev, "stat urb: status %d\n", | |
323 | urb->status); | |
324 | } | |
db32de11 | 325 | usb_free_urb(urb); |
115bb1ff MW |
326 | return; |
327 | } | |
328 | ||
023b515e GH |
329 | if (devinfo->resetting) { |
330 | usb_free_urb(urb); | |
331 | return; | |
332 | } | |
333 | ||
e0648520 | 334 | spin_lock_irqsave(&devinfo->lock, flags); |
115bb1ff | 335 | tag = be16_to_cpup(&iu->tag) - 1; |
22188f4a SAS |
336 | if (tag == 0) |
337 | cmnd = devinfo->cmnd; | |
115bb1ff | 338 | else |
22188f4a | 339 | cmnd = scsi_host_find_tag(shost, tag - 1); |
e0423dee | 340 | |
96c1eb98 | 341 | if (!cmnd) { |
e0423dee GH |
342 | if (iu->iu_id == IU_ID_RESPONSE) { |
343 | /* store results for uas_eh_task_mgmt() */ | |
344 | memcpy(&devinfo->response, iu, sizeof(devinfo->response)); | |
023b515e | 345 | } |
e0423dee GH |
346 | usb_free_urb(urb); |
347 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
348 | return; | |
96c1eb98 | 349 | } |
115bb1ff | 350 | |
e0423dee | 351 | cmdinfo = (void *)&cmnd->SCp; |
115bb1ff MW |
352 | switch (iu->iu_id) { |
353 | case IU_ID_STATUS: | |
22188f4a SAS |
354 | if (devinfo->cmnd == cmnd) |
355 | devinfo->cmnd = NULL; | |
356 | ||
115bb1ff MW |
357 | if (urb->actual_length < 16) |
358 | devinfo->uas_sense_old = 1; | |
359 | if (devinfo->uas_sense_old) | |
360 | uas_sense_old(urb, cmnd); | |
361 | else | |
362 | uas_sense(urb, cmnd); | |
8aac863e GH |
363 | if (cmnd->result != 0) { |
364 | /* cancel data transfers on error */ | |
7e50e0be | 365 | uas_unlink_data_urbs(devinfo, cmdinfo, &flags); |
8aac863e | 366 | } |
b1d67693 GH |
367 | cmdinfo->state &= ~COMMAND_INFLIGHT; |
368 | uas_try_complete(cmnd, __func__); | |
115bb1ff MW |
369 | break; |
370 | case IU_ID_READ_READY: | |
371 | uas_xfer_data(urb, cmnd, SUBMIT_DATA_IN_URB); | |
372 | break; | |
373 | case IU_ID_WRITE_READY: | |
374 | uas_xfer_data(urb, cmnd, SUBMIT_DATA_OUT_URB); | |
375 | break; | |
376 | default: | |
377 | scmd_printk(KERN_ERR, cmnd, | |
378 | "Bogus IU (%d) received on status pipe\n", iu->iu_id); | |
379 | } | |
e9bd7e1a | 380 | usb_free_urb(urb); |
e0648520 | 381 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
382 | } |
383 | ||
c621a81e | 384 | static void uas_data_cmplt(struct urb *urb) |
115bb1ff | 385 | { |
b1d67693 GH |
386 | struct scsi_cmnd *cmnd = urb->context; |
387 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
e0648520 | 388 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
b1d67693 | 389 | struct scsi_data_buffer *sdb = NULL; |
e0648520 | 390 | unsigned long flags; |
b1d67693 | 391 | |
e0648520 | 392 | spin_lock_irqsave(&devinfo->lock, flags); |
b1d67693 GH |
393 | if (cmdinfo->data_in_urb == urb) { |
394 | sdb = scsi_in(cmnd); | |
395 | cmdinfo->state &= ~DATA_IN_URB_INFLIGHT; | |
396 | } else if (cmdinfo->data_out_urb == urb) { | |
397 | sdb = scsi_out(cmnd); | |
398 | cmdinfo->state &= ~DATA_OUT_URB_INFLIGHT; | |
399 | } | |
f491ecbb GH |
400 | if (sdb == NULL) { |
401 | WARN_ON_ONCE(1); | |
402 | } else if (urb->status) { | |
8aac863e GH |
403 | /* error: no data transfered */ |
404 | sdb->resid = sdb->length; | |
405 | } else { | |
406 | sdb->resid = sdb->length - urb->actual_length; | |
407 | } | |
b1d67693 | 408 | uas_try_complete(cmnd, __func__); |
e0648520 | 409 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
410 | } |
411 | ||
412 | static struct urb *uas_alloc_data_urb(struct uas_dev_info *devinfo, gfp_t gfp, | |
b1d67693 GH |
413 | unsigned int pipe, u16 stream_id, |
414 | struct scsi_cmnd *cmnd, | |
415 | enum dma_data_direction dir) | |
115bb1ff MW |
416 | { |
417 | struct usb_device *udev = devinfo->udev; | |
418 | struct urb *urb = usb_alloc_urb(0, gfp); | |
b1d67693 GH |
419 | struct scsi_data_buffer *sdb = (dir == DMA_FROM_DEVICE) |
420 | ? scsi_in(cmnd) : scsi_out(cmnd); | |
115bb1ff MW |
421 | |
422 | if (!urb) | |
423 | goto out; | |
b1d67693 GH |
424 | usb_fill_bulk_urb(urb, udev, pipe, NULL, sdb->length, |
425 | uas_data_cmplt, cmnd); | |
c621a81e GH |
426 | if (devinfo->use_streams) |
427 | urb->stream_id = stream_id; | |
115bb1ff MW |
428 | urb->num_sgs = udev->bus->sg_tablesize ? sdb->table.nents : 0; |
429 | urb->sg = sdb->table.sgl; | |
430 | out: | |
431 | return urb; | |
432 | } | |
433 | ||
434 | static struct urb *uas_alloc_sense_urb(struct uas_dev_info *devinfo, gfp_t gfp, | |
e9bd7e1a | 435 | struct Scsi_Host *shost, u16 stream_id) |
115bb1ff MW |
436 | { |
437 | struct usb_device *udev = devinfo->udev; | |
438 | struct urb *urb = usb_alloc_urb(0, gfp); | |
439 | struct sense_iu *iu; | |
440 | ||
441 | if (!urb) | |
442 | goto out; | |
443 | ||
ac563cfd | 444 | iu = kzalloc(sizeof(*iu), gfp); |
115bb1ff MW |
445 | if (!iu) |
446 | goto free; | |
447 | ||
448 | usb_fill_bulk_urb(urb, udev, devinfo->status_pipe, iu, sizeof(*iu), | |
e9bd7e1a | 449 | uas_stat_cmplt, shost); |
115bb1ff MW |
450 | urb->stream_id = stream_id; |
451 | urb->transfer_flags |= URB_FREE_BUFFER; | |
452 | out: | |
453 | return urb; | |
454 | free: | |
455 | usb_free_urb(urb); | |
456 | return NULL; | |
457 | } | |
458 | ||
459 | static struct urb *uas_alloc_cmd_urb(struct uas_dev_info *devinfo, gfp_t gfp, | |
a887cd36 | 460 | struct scsi_cmnd *cmnd) |
115bb1ff MW |
461 | { |
462 | struct usb_device *udev = devinfo->udev; | |
463 | struct scsi_device *sdev = cmnd->device; | |
464 | struct urb *urb = usb_alloc_urb(0, gfp); | |
465 | struct command_iu *iu; | |
466 | int len; | |
467 | ||
468 | if (!urb) | |
469 | goto out; | |
470 | ||
471 | len = cmnd->cmd_len - 16; | |
472 | if (len < 0) | |
473 | len = 0; | |
474 | len = ALIGN(len, 4); | |
ac563cfd | 475 | iu = kzalloc(sizeof(*iu) + len, gfp); |
115bb1ff MW |
476 | if (!iu) |
477 | goto free; | |
478 | ||
479 | iu->iu_id = IU_ID_COMMAND; | |
9eb44541 | 480 | if (blk_rq_tagged(cmnd->request)) |
22188f4a | 481 | iu->tag = cpu_to_be16(cmnd->request->tag + 2); |
9eb44541 SS |
482 | else |
483 | iu->tag = cpu_to_be16(1); | |
02e031cb | 484 | iu->prio_attr = UAS_SIMPLE_TAG; |
115bb1ff MW |
485 | iu->len = len; |
486 | int_to_scsilun(sdev->lun, &iu->lun); | |
487 | memcpy(iu->cdb, cmnd->cmnd, cmnd->cmd_len); | |
488 | ||
489 | usb_fill_bulk_urb(urb, udev, devinfo->cmd_pipe, iu, sizeof(*iu) + len, | |
490 | usb_free_urb, NULL); | |
491 | urb->transfer_flags |= URB_FREE_BUFFER; | |
492 | out: | |
493 | return urb; | |
494 | free: | |
495 | usb_free_urb(urb); | |
496 | return NULL; | |
497 | } | |
498 | ||
023b515e GH |
499 | static int uas_submit_task_urb(struct scsi_cmnd *cmnd, gfp_t gfp, |
500 | u8 function, u16 stream_id) | |
501 | { | |
502 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; | |
503 | struct usb_device *udev = devinfo->udev; | |
504 | struct urb *urb = usb_alloc_urb(0, gfp); | |
505 | struct task_mgmt_iu *iu; | |
506 | int err = -ENOMEM; | |
507 | ||
508 | if (!urb) | |
509 | goto err; | |
510 | ||
511 | iu = kzalloc(sizeof(*iu), gfp); | |
512 | if (!iu) | |
513 | goto err; | |
514 | ||
515 | iu->iu_id = IU_ID_TASK_MGMT; | |
516 | iu->tag = cpu_to_be16(stream_id); | |
517 | int_to_scsilun(cmnd->device->lun, &iu->lun); | |
518 | ||
519 | iu->function = function; | |
520 | switch (function) { | |
521 | case TMF_ABORT_TASK: | |
522 | if (blk_rq_tagged(cmnd->request)) | |
523 | iu->task_tag = cpu_to_be16(cmnd->request->tag + 2); | |
524 | else | |
525 | iu->task_tag = cpu_to_be16(1); | |
526 | break; | |
527 | } | |
528 | ||
529 | usb_fill_bulk_urb(urb, udev, devinfo->cmd_pipe, iu, sizeof(*iu), | |
530 | usb_free_urb, NULL); | |
531 | urb->transfer_flags |= URB_FREE_BUFFER; | |
532 | ||
d5f808d3 | 533 | usb_anchor_urb(urb, &devinfo->cmd_urbs); |
023b515e | 534 | err = usb_submit_urb(urb, gfp); |
d5f808d3 HG |
535 | if (err) { |
536 | usb_unanchor_urb(urb); | |
023b515e | 537 | goto err; |
d5f808d3 | 538 | } |
023b515e GH |
539 | |
540 | return 0; | |
541 | ||
542 | err: | |
543 | usb_free_urb(urb); | |
544 | return err; | |
545 | } | |
546 | ||
115bb1ff MW |
547 | /* |
548 | * Why should I request the Status IU before sending the Command IU? Spec | |
549 | * says to, but also says the device may receive them in any order. Seems | |
550 | * daft to me. | |
551 | */ | |
552 | ||
70cf0fba HG |
553 | static struct urb *uas_submit_sense_urb(struct Scsi_Host *shost, |
554 | gfp_t gfp, unsigned int stream) | |
115bb1ff | 555 | { |
e9bd7e1a GH |
556 | struct uas_dev_info *devinfo = (void *)shost->hostdata[0]; |
557 | struct urb *urb; | |
115bb1ff | 558 | |
e9bd7e1a GH |
559 | urb = uas_alloc_sense_urb(devinfo, gfp, shost, stream); |
560 | if (!urb) | |
70cf0fba | 561 | return NULL; |
d5f808d3 | 562 | usb_anchor_urb(urb, &devinfo->sense_urbs); |
e9bd7e1a | 563 | if (usb_submit_urb(urb, gfp)) { |
d5f808d3 | 564 | usb_unanchor_urb(urb); |
e9bd7e1a GH |
565 | shost_printk(KERN_INFO, shost, |
566 | "sense urb submission failure\n"); | |
567 | usb_free_urb(urb); | |
70cf0fba | 568 | return NULL; |
115bb1ff | 569 | } |
70cf0fba | 570 | return urb; |
e9bd7e1a GH |
571 | } |
572 | ||
573 | static int uas_submit_urbs(struct scsi_cmnd *cmnd, | |
574 | struct uas_dev_info *devinfo, gfp_t gfp) | |
575 | { | |
576 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
70cf0fba | 577 | struct urb *urb; |
115bb1ff | 578 | |
f491ecbb | 579 | WARN_ON_ONCE(!spin_is_locked(&devinfo->lock)); |
92a3f767 | 580 | if (cmdinfo->state & SUBMIT_STATUS_URB) { |
70cf0fba | 581 | urb = uas_submit_sense_urb(cmnd->device->host, gfp, |
e9bd7e1a | 582 | cmdinfo->stream); |
70cf0fba HG |
583 | if (!urb) |
584 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
92a3f767 | 585 | cmdinfo->state &= ~SUBMIT_STATUS_URB; |
115bb1ff MW |
586 | } |
587 | ||
588 | if (cmdinfo->state & ALLOC_DATA_IN_URB) { | |
589 | cmdinfo->data_in_urb = uas_alloc_data_urb(devinfo, gfp, | |
c621a81e | 590 | devinfo->data_in_pipe, cmdinfo->stream, |
b1d67693 | 591 | cmnd, DMA_FROM_DEVICE); |
115bb1ff MW |
592 | if (!cmdinfo->data_in_urb) |
593 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
594 | cmdinfo->state &= ~ALLOC_DATA_IN_URB; | |
595 | } | |
596 | ||
597 | if (cmdinfo->state & SUBMIT_DATA_IN_URB) { | |
d5f808d3 | 598 | usb_anchor_urb(cmdinfo->data_in_urb, &devinfo->data_urbs); |
115bb1ff | 599 | if (usb_submit_urb(cmdinfo->data_in_urb, gfp)) { |
d5f808d3 | 600 | usb_unanchor_urb(cmdinfo->data_in_urb); |
115bb1ff MW |
601 | scmd_printk(KERN_INFO, cmnd, |
602 | "data in urb submission failure\n"); | |
603 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
604 | } | |
605 | cmdinfo->state &= ~SUBMIT_DATA_IN_URB; | |
b1d67693 | 606 | cmdinfo->state |= DATA_IN_URB_INFLIGHT; |
115bb1ff MW |
607 | } |
608 | ||
609 | if (cmdinfo->state & ALLOC_DATA_OUT_URB) { | |
610 | cmdinfo->data_out_urb = uas_alloc_data_urb(devinfo, gfp, | |
c621a81e | 611 | devinfo->data_out_pipe, cmdinfo->stream, |
b1d67693 | 612 | cmnd, DMA_TO_DEVICE); |
115bb1ff MW |
613 | if (!cmdinfo->data_out_urb) |
614 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
615 | cmdinfo->state &= ~ALLOC_DATA_OUT_URB; | |
616 | } | |
617 | ||
618 | if (cmdinfo->state & SUBMIT_DATA_OUT_URB) { | |
d5f808d3 | 619 | usb_anchor_urb(cmdinfo->data_out_urb, &devinfo->data_urbs); |
115bb1ff | 620 | if (usb_submit_urb(cmdinfo->data_out_urb, gfp)) { |
d5f808d3 | 621 | usb_unanchor_urb(cmdinfo->data_out_urb); |
115bb1ff MW |
622 | scmd_printk(KERN_INFO, cmnd, |
623 | "data out urb submission failure\n"); | |
624 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
625 | } | |
626 | cmdinfo->state &= ~SUBMIT_DATA_OUT_URB; | |
b1d67693 | 627 | cmdinfo->state |= DATA_OUT_URB_INFLIGHT; |
115bb1ff MW |
628 | } |
629 | ||
630 | if (cmdinfo->state & ALLOC_CMD_URB) { | |
a887cd36 | 631 | cmdinfo->cmd_urb = uas_alloc_cmd_urb(devinfo, gfp, cmnd); |
115bb1ff MW |
632 | if (!cmdinfo->cmd_urb) |
633 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
634 | cmdinfo->state &= ~ALLOC_CMD_URB; | |
635 | } | |
636 | ||
637 | if (cmdinfo->state & SUBMIT_CMD_URB) { | |
d5f808d3 | 638 | usb_anchor_urb(cmdinfo->cmd_urb, &devinfo->cmd_urbs); |
115bb1ff | 639 | if (usb_submit_urb(cmdinfo->cmd_urb, gfp)) { |
d5f808d3 | 640 | usb_unanchor_urb(cmdinfo->cmd_urb); |
115bb1ff MW |
641 | scmd_printk(KERN_INFO, cmnd, |
642 | "cmd urb submission failure\n"); | |
643 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
644 | } | |
a0e39e34 | 645 | cmdinfo->cmd_urb = NULL; |
115bb1ff | 646 | cmdinfo->state &= ~SUBMIT_CMD_URB; |
b1d67693 | 647 | cmdinfo->state |= COMMAND_INFLIGHT; |
115bb1ff MW |
648 | } |
649 | ||
650 | return 0; | |
651 | } | |
652 | ||
f281233d | 653 | static int uas_queuecommand_lck(struct scsi_cmnd *cmnd, |
115bb1ff MW |
654 | void (*done)(struct scsi_cmnd *)) |
655 | { | |
656 | struct scsi_device *sdev = cmnd->device; | |
657 | struct uas_dev_info *devinfo = sdev->hostdata; | |
658 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
e0648520 | 659 | unsigned long flags; |
115bb1ff MW |
660 | int err; |
661 | ||
662 | BUILD_BUG_ON(sizeof(struct uas_cmd_info) > sizeof(struct scsi_pointer)); | |
663 | ||
f8be6bfc GH |
664 | if (devinfo->resetting) { |
665 | cmnd->result = DID_ERROR << 16; | |
666 | cmnd->scsi_done(cmnd); | |
667 | return 0; | |
668 | } | |
669 | ||
e0648520 GH |
670 | spin_lock_irqsave(&devinfo->lock, flags); |
671 | if (devinfo->cmnd) { | |
672 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
115bb1ff | 673 | return SCSI_MLQUEUE_DEVICE_BUSY; |
e0648520 | 674 | } |
115bb1ff MW |
675 | |
676 | if (blk_rq_tagged(cmnd->request)) { | |
22188f4a | 677 | cmdinfo->stream = cmnd->request->tag + 2; |
115bb1ff | 678 | } else { |
22188f4a | 679 | devinfo->cmnd = cmnd; |
115bb1ff MW |
680 | cmdinfo->stream = 1; |
681 | } | |
682 | ||
683 | cmnd->scsi_done = done; | |
684 | ||
e9bd7e1a | 685 | cmdinfo->state = SUBMIT_STATUS_URB | |
115bb1ff MW |
686 | ALLOC_CMD_URB | SUBMIT_CMD_URB; |
687 | ||
688 | switch (cmnd->sc_data_direction) { | |
689 | case DMA_FROM_DEVICE: | |
690 | cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB; | |
691 | break; | |
692 | case DMA_BIDIRECTIONAL: | |
693 | cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB; | |
694 | case DMA_TO_DEVICE: | |
695 | cmdinfo->state |= ALLOC_DATA_OUT_URB | SUBMIT_DATA_OUT_URB; | |
696 | case DMA_NONE: | |
697 | break; | |
698 | } | |
699 | ||
700 | if (!devinfo->use_streams) { | |
db32de11 | 701 | cmdinfo->state &= ~(SUBMIT_DATA_IN_URB | SUBMIT_DATA_OUT_URB); |
115bb1ff MW |
702 | cmdinfo->stream = 0; |
703 | } | |
704 | ||
705 | err = uas_submit_urbs(cmnd, devinfo, GFP_ATOMIC); | |
706 | if (err) { | |
707 | /* If we did nothing, give up now */ | |
92a3f767 | 708 | if (cmdinfo->state & SUBMIT_STATUS_URB) { |
e0648520 | 709 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
710 | return SCSI_MLQUEUE_DEVICE_BUSY; |
711 | } | |
1bf8198e | 712 | uas_add_work(cmdinfo); |
115bb1ff MW |
713 | } |
714 | ||
e0648520 | 715 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
716 | return 0; |
717 | } | |
718 | ||
f281233d JG |
719 | static DEF_SCSI_QCMD(uas_queuecommand) |
720 | ||
023b515e GH |
721 | static int uas_eh_task_mgmt(struct scsi_cmnd *cmnd, |
722 | const char *fname, u8 function) | |
115bb1ff | 723 | { |
023b515e GH |
724 | struct Scsi_Host *shost = cmnd->device->host; |
725 | struct uas_dev_info *devinfo = (void *)shost->hostdata[0]; | |
d3f7c156 | 726 | u16 tag = devinfo->qdepth; |
e0648520 | 727 | unsigned long flags; |
70cf0fba | 728 | struct urb *sense_urb; |
115bb1ff | 729 | |
e0648520 | 730 | spin_lock_irqsave(&devinfo->lock, flags); |
023b515e | 731 | memset(&devinfo->response, 0, sizeof(devinfo->response)); |
70cf0fba HG |
732 | sense_urb = uas_submit_sense_urb(shost, GFP_ATOMIC, tag); |
733 | if (!sense_urb) { | |
023b515e GH |
734 | shost_printk(KERN_INFO, shost, |
735 | "%s: %s: submit sense urb failed\n", | |
736 | __func__, fname); | |
1994ff40 | 737 | spin_unlock_irqrestore(&devinfo->lock, flags); |
023b515e GH |
738 | return FAILED; |
739 | } | |
e0648520 | 740 | if (uas_submit_task_urb(cmnd, GFP_ATOMIC, function, tag)) { |
023b515e GH |
741 | shost_printk(KERN_INFO, shost, |
742 | "%s: %s: submit task mgmt urb failed\n", | |
743 | __func__, fname); | |
1994ff40 | 744 | spin_unlock_irqrestore(&devinfo->lock, flags); |
70cf0fba | 745 | usb_kill_urb(sense_urb); |
023b515e GH |
746 | return FAILED; |
747 | } | |
e0648520 GH |
748 | spin_unlock_irqrestore(&devinfo->lock, flags); |
749 | ||
750 | if (usb_wait_anchor_empty_timeout(&devinfo->sense_urbs, 3000) == 0) { | |
023b515e GH |
751 | shost_printk(KERN_INFO, shost, |
752 | "%s: %s timed out\n", __func__, fname); | |
753 | return FAILED; | |
754 | } | |
755 | if (be16_to_cpu(devinfo->response.tag) != tag) { | |
756 | shost_printk(KERN_INFO, shost, | |
757 | "%s: %s failed (wrong tag %d/%d)\n", __func__, | |
758 | fname, be16_to_cpu(devinfo->response.tag), tag); | |
759 | return FAILED; | |
760 | } | |
761 | if (devinfo->response.response_code != RC_TMF_COMPLETE) { | |
762 | shost_printk(KERN_INFO, shost, | |
763 | "%s: %s failed (rc 0x%x)\n", __func__, | |
764 | fname, devinfo->response.response_code); | |
765 | return FAILED; | |
766 | } | |
767 | return SUCCESS; | |
115bb1ff MW |
768 | } |
769 | ||
023b515e | 770 | static int uas_eh_abort_handler(struct scsi_cmnd *cmnd) |
115bb1ff | 771 | { |
023b515e | 772 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; |
e0648520 GH |
773 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
774 | unsigned long flags; | |
023b515e | 775 | int ret; |
115bb1ff | 776 | |
023b515e | 777 | uas_log_cmd_state(cmnd, __func__); |
e0648520 | 778 | spin_lock_irqsave(&devinfo->lock, flags); |
f491ecbb | 779 | WARN_ON_ONCE(cmdinfo->state & COMMAND_ABORTED); |
ef018cc9 | 780 | cmdinfo->state |= COMMAND_ABORTED; |
326349f8 | 781 | list_add_tail(&cmdinfo->dead, &devinfo->dead_list); |
5d390403 | 782 | if (cmdinfo->state & IS_IN_WORK_LIST) { |
1bf8198e | 783 | list_del(&cmdinfo->work); |
5d390403 | 784 | cmdinfo->state &= ~IS_IN_WORK_LIST; |
5d390403 GH |
785 | } |
786 | if (cmdinfo->state & COMMAND_INFLIGHT) { | |
787 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
788 | ret = uas_eh_task_mgmt(cmnd, "ABORT TASK", TMF_ABORT_TASK); | |
789 | } else { | |
7e50e0be | 790 | uas_unlink_data_urbs(devinfo, cmdinfo, &flags); |
5d390403 GH |
791 | uas_try_complete(cmnd, __func__); |
792 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
793 | ret = SUCCESS; | |
794 | } | |
023b515e | 795 | return ret; |
115bb1ff MW |
796 | } |
797 | ||
023b515e | 798 | static int uas_eh_device_reset_handler(struct scsi_cmnd *cmnd) |
115bb1ff | 799 | { |
023b515e GH |
800 | sdev_printk(KERN_INFO, cmnd->device, "%s\n", __func__); |
801 | return uas_eh_task_mgmt(cmnd, "LOGICAL UNIT RESET", | |
802 | TMF_LOGICAL_UNIT_RESET); | |
115bb1ff MW |
803 | } |
804 | ||
805 | static int uas_eh_bus_reset_handler(struct scsi_cmnd *cmnd) | |
806 | { | |
807 | struct scsi_device *sdev = cmnd->device; | |
808 | struct uas_dev_info *devinfo = sdev->hostdata; | |
809 | struct usb_device *udev = devinfo->udev; | |
023b515e | 810 | int err; |
115bb1ff | 811 | |
be326f4c HG |
812 | err = usb_lock_device_for_reset(udev, devinfo->intf); |
813 | if (err) { | |
814 | shost_printk(KERN_ERR, sdev->host, | |
815 | "%s FAILED to get lock err %d\n", __func__, err); | |
816 | return FAILED; | |
817 | } | |
818 | ||
326349f8 | 819 | shost_printk(KERN_INFO, sdev->host, "%s start\n", __func__); |
023b515e | 820 | devinfo->resetting = 1; |
4c456971 | 821 | uas_abort_work(devinfo); |
a0e39e34 | 822 | usb_kill_anchored_urbs(&devinfo->cmd_urbs); |
023b515e GH |
823 | usb_kill_anchored_urbs(&devinfo->sense_urbs); |
824 | usb_kill_anchored_urbs(&devinfo->data_urbs); | |
326349f8 | 825 | uas_zap_dead(devinfo); |
023b515e GH |
826 | err = usb_reset_device(udev); |
827 | devinfo->resetting = 0; | |
115bb1ff | 828 | |
be326f4c HG |
829 | usb_unlock_device(udev); |
830 | ||
023b515e GH |
831 | if (err) { |
832 | shost_printk(KERN_INFO, sdev->host, "%s FAILED\n", __func__); | |
833 | return FAILED; | |
834 | } | |
115bb1ff | 835 | |
023b515e GH |
836 | shost_printk(KERN_INFO, sdev->host, "%s success\n", __func__); |
837 | return SUCCESS; | |
115bb1ff MW |
838 | } |
839 | ||
840 | static int uas_slave_alloc(struct scsi_device *sdev) | |
841 | { | |
842 | sdev->hostdata = (void *)sdev->host->hostdata[0]; | |
843 | return 0; | |
844 | } | |
845 | ||
846 | static int uas_slave_configure(struct scsi_device *sdev) | |
847 | { | |
848 | struct uas_dev_info *devinfo = sdev->hostdata; | |
849 | scsi_set_tag_type(sdev, MSG_ORDERED_TAG); | |
d3f7c156 | 850 | scsi_activate_tcq(sdev, devinfo->qdepth - 2); |
115bb1ff MW |
851 | return 0; |
852 | } | |
853 | ||
854 | static struct scsi_host_template uas_host_template = { | |
855 | .module = THIS_MODULE, | |
856 | .name = "uas", | |
857 | .queuecommand = uas_queuecommand, | |
858 | .slave_alloc = uas_slave_alloc, | |
859 | .slave_configure = uas_slave_configure, | |
860 | .eh_abort_handler = uas_eh_abort_handler, | |
861 | .eh_device_reset_handler = uas_eh_device_reset_handler, | |
115bb1ff MW |
862 | .eh_bus_reset_handler = uas_eh_bus_reset_handler, |
863 | .can_queue = 65536, /* Is there a limit on the _host_ ? */ | |
864 | .this_id = -1, | |
865 | .sg_tablesize = SG_NONE, | |
866 | .cmd_per_lun = 1, /* until we override it */ | |
867 | .skip_settle_delay = 1, | |
868 | .ordered_tag = 1, | |
869 | }; | |
870 | ||
79b4c061 HG |
871 | #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \ |
872 | vendorName, productName, useProtocol, useTransport, \ | |
873 | initFunction, flags) \ | |
874 | { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \ | |
875 | .driver_info = (flags) } | |
876 | ||
115bb1ff | 877 | static struct usb_device_id uas_usb_ids[] = { |
79b4c061 | 878 | # include "unusual_uas.h" |
115bb1ff MW |
879 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_BULK) }, |
880 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_UAS) }, | |
881 | /* 0xaa is a prototype device I happen to have access to */ | |
882 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, 0xaa) }, | |
883 | { } | |
884 | }; | |
885 | MODULE_DEVICE_TABLE(usb, uas_usb_ids); | |
886 | ||
79b4c061 HG |
887 | #undef UNUSUAL_DEV |
888 | ||
e1be067b HG |
889 | static int uas_switch_interface(struct usb_device *udev, |
890 | struct usb_interface *intf) | |
891 | { | |
892 | int alt; | |
893 | ||
894 | alt = uas_find_uas_alt_setting(intf); | |
895 | if (alt < 0) | |
896 | return alt; | |
897 | ||
898 | return usb_set_interface(udev, | |
899 | intf->altsetting[0].desc.bInterfaceNumber, alt); | |
900 | } | |
901 | ||
58d51444 | 902 | static int uas_configure_endpoints(struct uas_dev_info *devinfo) |
34f11e59 HG |
903 | { |
904 | struct usb_host_endpoint *eps[4] = { }; | |
905 | struct usb_device *udev = devinfo->udev; | |
906 | int r; | |
907 | ||
908 | devinfo->uas_sense_old = 0; | |
909 | devinfo->cmnd = NULL; | |
910 | ||
911 | r = uas_find_endpoints(devinfo->intf->cur_altsetting, eps); | |
74d71aec HG |
912 | if (r) |
913 | return r; | |
914 | ||
915 | devinfo->cmd_pipe = usb_sndbulkpipe(udev, | |
916 | usb_endpoint_num(&eps[0]->desc)); | |
917 | devinfo->status_pipe = usb_rcvbulkpipe(udev, | |
918 | usb_endpoint_num(&eps[1]->desc)); | |
919 | devinfo->data_in_pipe = usb_rcvbulkpipe(udev, | |
920 | usb_endpoint_num(&eps[2]->desc)); | |
921 | devinfo->data_out_pipe = usb_sndbulkpipe(udev, | |
922 | usb_endpoint_num(&eps[3]->desc)); | |
115bb1ff | 923 | |
58d51444 | 924 | if (udev->speed != USB_SPEED_SUPER) { |
115bb1ff MW |
925 | devinfo->qdepth = 256; |
926 | devinfo->use_streams = 0; | |
927 | } else { | |
58d51444 HG |
928 | devinfo->qdepth = usb_alloc_streams(devinfo->intf, eps + 1, |
929 | 3, 256, GFP_KERNEL); | |
930 | if (devinfo->qdepth < 0) | |
931 | return devinfo->qdepth; | |
115bb1ff MW |
932 | devinfo->use_streams = 1; |
933 | } | |
58d51444 HG |
934 | |
935 | return 0; | |
115bb1ff MW |
936 | } |
937 | ||
dae51546 SAS |
938 | static void uas_free_streams(struct uas_dev_info *devinfo) |
939 | { | |
940 | struct usb_device *udev = devinfo->udev; | |
941 | struct usb_host_endpoint *eps[3]; | |
942 | ||
943 | eps[0] = usb_pipe_endpoint(udev, devinfo->status_pipe); | |
944 | eps[1] = usb_pipe_endpoint(udev, devinfo->data_in_pipe); | |
945 | eps[2] = usb_pipe_endpoint(udev, devinfo->data_out_pipe); | |
946 | usb_free_streams(devinfo->intf, eps, 3, GFP_KERNEL); | |
947 | } | |
948 | ||
115bb1ff MW |
949 | /* |
950 | * XXX: What I'd like to do here is register a SCSI host for each USB host in | |
951 | * the system. Follow usb-storage's design of registering a SCSI host for | |
952 | * each USB device for the moment. Can implement this by walking up the | |
953 | * USB hierarchy until we find a USB host. | |
954 | */ | |
955 | static int uas_probe(struct usb_interface *intf, const struct usb_device_id *id) | |
956 | { | |
6ce8213b HG |
957 | int result = -ENOMEM; |
958 | struct Scsi_Host *shost = NULL; | |
115bb1ff MW |
959 | struct uas_dev_info *devinfo; |
960 | struct usb_device *udev = interface_to_usbdev(intf); | |
961 | ||
79b4c061 HG |
962 | if (!uas_use_uas_driver(intf, id)) |
963 | return -ENODEV; | |
964 | ||
89dc2905 MW |
965 | if (uas_switch_interface(udev, intf)) |
966 | return -ENODEV; | |
115bb1ff MW |
967 | |
968 | devinfo = kmalloc(sizeof(struct uas_dev_info), GFP_KERNEL); | |
969 | if (!devinfo) | |
6ce8213b | 970 | goto set_alt0; |
115bb1ff | 971 | |
115bb1ff MW |
972 | shost = scsi_host_alloc(&uas_host_template, sizeof(void *)); |
973 | if (!shost) | |
6ce8213b | 974 | goto set_alt0; |
115bb1ff MW |
975 | |
976 | shost->max_cmd_len = 16 + 252; | |
977 | shost->max_id = 1; | |
bde027b4 GH |
978 | shost->max_lun = 256; |
979 | shost->max_channel = 0; | |
115bb1ff MW |
980 | shost->sg_tablesize = udev->bus->sg_tablesize; |
981 | ||
115bb1ff MW |
982 | devinfo->intf = intf; |
983 | devinfo->udev = udev; | |
023b515e | 984 | devinfo->resetting = 0; |
a0e39e34 | 985 | init_usb_anchor(&devinfo->cmd_urbs); |
bdd000fb GH |
986 | init_usb_anchor(&devinfo->sense_urbs); |
987 | init_usb_anchor(&devinfo->data_urbs); | |
e0648520 | 988 | spin_lock_init(&devinfo->lock); |
1bf8198e GH |
989 | INIT_WORK(&devinfo->work, uas_do_work); |
990 | INIT_LIST_HEAD(&devinfo->work_list); | |
326349f8 | 991 | INIT_LIST_HEAD(&devinfo->dead_list); |
58d51444 HG |
992 | |
993 | result = uas_configure_endpoints(devinfo); | |
994 | if (result) | |
995 | goto set_alt0; | |
115bb1ff | 996 | |
d3f7c156 | 997 | result = scsi_init_shared_tag_map(shost, devinfo->qdepth - 2); |
115bb1ff | 998 | if (result) |
6ce8213b | 999 | goto free_streams; |
dae51546 SAS |
1000 | |
1001 | result = scsi_add_host(shost, &intf->dev); | |
1002 | if (result) | |
6ce8213b | 1003 | goto free_streams; |
dae51546 | 1004 | |
115bb1ff MW |
1005 | shost->hostdata[0] = (unsigned long)devinfo; |
1006 | ||
115bb1ff MW |
1007 | scsi_scan_host(shost); |
1008 | usb_set_intfdata(intf, shost); | |
1009 | return result; | |
dae51546 | 1010 | |
6ce8213b | 1011 | free_streams: |
dae51546 | 1012 | uas_free_streams(devinfo); |
6ce8213b HG |
1013 | set_alt0: |
1014 | usb_set_interface(udev, intf->altsetting[0].desc.bInterfaceNumber, 0); | |
115bb1ff MW |
1015 | kfree(devinfo); |
1016 | if (shost) | |
1017 | scsi_host_put(shost); | |
1018 | return result; | |
1019 | } | |
1020 | ||
1021 | static int uas_pre_reset(struct usb_interface *intf) | |
1022 | { | |
4de7a373 HG |
1023 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
1024 | struct uas_dev_info *devinfo = (void *)shost->hostdata[0]; | |
1025 | unsigned long flags; | |
1026 | ||
1027 | /* Block new requests */ | |
1028 | spin_lock_irqsave(shost->host_lock, flags); | |
1029 | scsi_block_requests(shost); | |
1030 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1031 | ||
1032 | /* Wait for any pending requests to complete */ | |
1033 | flush_work(&devinfo->work); | |
1034 | if (usb_wait_anchor_empty_timeout(&devinfo->sense_urbs, 5000) == 0) { | |
1035 | shost_printk(KERN_ERR, shost, "%s: timed out\n", __func__); | |
1036 | return 1; | |
1037 | } | |
1038 | ||
1039 | uas_free_streams(devinfo); | |
1040 | ||
115bb1ff MW |
1041 | return 0; |
1042 | } | |
1043 | ||
1044 | static int uas_post_reset(struct usb_interface *intf) | |
1045 | { | |
4de7a373 HG |
1046 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
1047 | struct uas_dev_info *devinfo = (void *)shost->hostdata[0]; | |
1048 | unsigned long flags; | |
1049 | ||
58d51444 HG |
1050 | if (uas_configure_endpoints(devinfo) != 0) { |
1051 | shost_printk(KERN_ERR, shost, | |
1052 | "%s: alloc streams error after reset", __func__); | |
1053 | return 1; | |
1054 | } | |
4de7a373 HG |
1055 | |
1056 | spin_lock_irqsave(shost->host_lock, flags); | |
1057 | scsi_report_bus_reset(shost, 0); | |
1058 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1059 | ||
1060 | scsi_unblock_requests(shost); | |
1061 | ||
115bb1ff MW |
1062 | return 0; |
1063 | } | |
1064 | ||
1065 | static void uas_disconnect(struct usb_interface *intf) | |
1066 | { | |
115bb1ff MW |
1067 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
1068 | struct uas_dev_info *devinfo = (void *)shost->hostdata[0]; | |
1069 | ||
4c456971 | 1070 | devinfo->resetting = 1; |
1bf8198e | 1071 | cancel_work_sync(&devinfo->work); |
4c456971 | 1072 | uas_abort_work(devinfo); |
a0e39e34 | 1073 | usb_kill_anchored_urbs(&devinfo->cmd_urbs); |
bdd000fb GH |
1074 | usb_kill_anchored_urbs(&devinfo->sense_urbs); |
1075 | usb_kill_anchored_urbs(&devinfo->data_urbs); | |
326349f8 | 1076 | uas_zap_dead(devinfo); |
4c456971 | 1077 | scsi_remove_host(shost); |
dae51546 | 1078 | uas_free_streams(devinfo); |
115bb1ff MW |
1079 | kfree(devinfo); |
1080 | } | |
1081 | ||
115bb1ff MW |
1082 | static struct usb_driver uas_driver = { |
1083 | .name = "uas", | |
1084 | .probe = uas_probe, | |
1085 | .disconnect = uas_disconnect, | |
1086 | .pre_reset = uas_pre_reset, | |
1087 | .post_reset = uas_post_reset, | |
1088 | .id_table = uas_usb_ids, | |
1089 | }; | |
1090 | ||
65db4305 | 1091 | module_usb_driver(uas_driver); |
115bb1ff MW |
1092 | |
1093 | MODULE_LICENSE("GPL"); | |
1094 | MODULE_AUTHOR("Matthew Wilcox and Sarah Sharp"); |