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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> |
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); |
d89bd835 GH |
88 | static void uas_configure_endpoints(struct uas_dev_info *devinfo); |
89 | static void uas_free_streams(struct uas_dev_info *devinfo); | |
115bb1ff | 90 | |
ea9da1c7 | 91 | static DECLARE_WORK(uas_work, uas_do_work); |
115bb1ff MW |
92 | static DEFINE_SPINLOCK(uas_work_lock); |
93 | static LIST_HEAD(uas_work_list); | |
94 | ||
aa8f6123 GH |
95 | static void uas_unlink_data_urbs(struct uas_dev_info *devinfo, |
96 | struct uas_cmd_info *cmdinfo) | |
97 | { | |
b06e48af GH |
98 | unsigned long flags; |
99 | ||
100 | /* | |
101 | * The UNLINK_DATA_URBS flag makes sure uas_try_complete | |
102 | * (called by urb completion) doesn't release cmdinfo | |
103 | * underneath us. | |
104 | */ | |
105 | spin_lock_irqsave(&devinfo->lock, flags); | |
106 | cmdinfo->state |= UNLINK_DATA_URBS; | |
107 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
108 | ||
aa8f6123 GH |
109 | if (cmdinfo->data_in_urb) |
110 | usb_unlink_urb(cmdinfo->data_in_urb); | |
111 | if (cmdinfo->data_out_urb) | |
112 | usb_unlink_urb(cmdinfo->data_out_urb); | |
b06e48af GH |
113 | |
114 | spin_lock_irqsave(&devinfo->lock, flags); | |
115 | cmdinfo->state &= ~UNLINK_DATA_URBS; | |
116 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
aa8f6123 GH |
117 | } |
118 | ||
115bb1ff MW |
119 | static void uas_do_work(struct work_struct *work) |
120 | { | |
121 | struct uas_cmd_info *cmdinfo; | |
ea9da1c7 | 122 | struct uas_cmd_info *temp; |
115bb1ff | 123 | struct list_head list; |
e0648520 | 124 | unsigned long flags; |
ea9da1c7 | 125 | int err; |
115bb1ff MW |
126 | |
127 | spin_lock_irq(&uas_work_lock); | |
128 | list_replace_init(&uas_work_list, &list); | |
129 | spin_unlock_irq(&uas_work_lock); | |
130 | ||
ea9da1c7 | 131 | list_for_each_entry_safe(cmdinfo, temp, &list, list) { |
115bb1ff MW |
132 | struct scsi_pointer *scp = (void *)cmdinfo; |
133 | struct scsi_cmnd *cmnd = container_of(scp, | |
134 | struct scsi_cmnd, SCp); | |
e0648520 GH |
135 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
136 | spin_lock_irqsave(&devinfo->lock, flags); | |
137 | err = uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_ATOMIC); | |
efefecf3 GH |
138 | if (!err) |
139 | cmdinfo->state &= ~IS_IN_WORK_LIST; | |
e0648520 | 140 | spin_unlock_irqrestore(&devinfo->lock, flags); |
ea9da1c7 SS |
141 | if (err) { |
142 | list_del(&cmdinfo->list); | |
143 | spin_lock_irq(&uas_work_lock); | |
144 | list_add_tail(&cmdinfo->list, &uas_work_list); | |
145 | spin_unlock_irq(&uas_work_lock); | |
146 | schedule_work(&uas_work); | |
147 | } | |
115bb1ff MW |
148 | } |
149 | } | |
150 | ||
4c456971 GH |
151 | static void uas_abort_work(struct uas_dev_info *devinfo) |
152 | { | |
153 | struct uas_cmd_info *cmdinfo; | |
154 | struct uas_cmd_info *temp; | |
155 | struct list_head list; | |
156 | unsigned long flags; | |
157 | ||
158 | spin_lock_irq(&uas_work_lock); | |
159 | list_replace_init(&uas_work_list, &list); | |
160 | spin_unlock_irq(&uas_work_lock); | |
161 | ||
162 | spin_lock_irqsave(&devinfo->lock, flags); | |
163 | list_for_each_entry_safe(cmdinfo, temp, &list, list) { | |
164 | struct scsi_pointer *scp = (void *)cmdinfo; | |
165 | struct scsi_cmnd *cmnd = container_of(scp, | |
166 | struct scsi_cmnd, SCp); | |
167 | struct uas_dev_info *di = (void *)cmnd->device->hostdata; | |
168 | ||
169 | if (di == devinfo) { | |
170 | cmdinfo->state |= COMMAND_ABORTED; | |
171 | cmdinfo->state &= ~IS_IN_WORK_LIST; | |
172 | if (devinfo->resetting) { | |
173 | /* uas_stat_cmplt() will not do that | |
174 | * when a device reset is in | |
175 | * progress */ | |
176 | cmdinfo->state &= ~COMMAND_INFLIGHT; | |
177 | } | |
178 | uas_try_complete(cmnd, __func__); | |
179 | } else { | |
180 | /* not our uas device, relink into list */ | |
181 | list_del(&cmdinfo->list); | |
182 | spin_lock_irq(&uas_work_lock); | |
183 | list_add_tail(&cmdinfo->list, &uas_work_list); | |
184 | spin_unlock_irq(&uas_work_lock); | |
185 | } | |
186 | } | |
187 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
188 | } | |
189 | ||
115bb1ff MW |
190 | static void uas_sense(struct urb *urb, struct scsi_cmnd *cmnd) |
191 | { | |
192 | struct sense_iu *sense_iu = urb->transfer_buffer; | |
193 | struct scsi_device *sdev = cmnd->device; | |
194 | ||
195 | if (urb->actual_length > 16) { | |
196 | unsigned len = be16_to_cpup(&sense_iu->len); | |
197 | if (len + 16 != urb->actual_length) { | |
198 | int newlen = min(len + 16, urb->actual_length) - 16; | |
199 | if (newlen < 0) | |
200 | newlen = 0; | |
201 | sdev_printk(KERN_INFO, sdev, "%s: urb length %d " | |
202 | "disagrees with IU sense data length %d, " | |
203 | "using %d bytes of sense data\n", __func__, | |
204 | urb->actual_length, len, newlen); | |
205 | len = newlen; | |
206 | } | |
207 | memcpy(cmnd->sense_buffer, sense_iu->sense, len); | |
208 | } | |
209 | ||
210 | cmnd->result = sense_iu->status; | |
115bb1ff MW |
211 | } |
212 | ||
213 | static void uas_sense_old(struct urb *urb, struct scsi_cmnd *cmnd) | |
214 | { | |
215 | struct sense_iu_old *sense_iu = urb->transfer_buffer; | |
216 | struct scsi_device *sdev = cmnd->device; | |
217 | ||
218 | if (urb->actual_length > 8) { | |
219 | unsigned len = be16_to_cpup(&sense_iu->len) - 2; | |
220 | if (len + 8 != urb->actual_length) { | |
221 | int newlen = min(len + 8, urb->actual_length) - 8; | |
222 | if (newlen < 0) | |
223 | newlen = 0; | |
224 | sdev_printk(KERN_INFO, sdev, "%s: urb length %d " | |
225 | "disagrees with IU sense data length %d, " | |
226 | "using %d bytes of sense data\n", __func__, | |
227 | urb->actual_length, len, newlen); | |
228 | len = newlen; | |
229 | } | |
230 | memcpy(cmnd->sense_buffer, sense_iu->sense, len); | |
231 | } | |
232 | ||
233 | cmnd->result = sense_iu->status; | |
b1d67693 GH |
234 | } |
235 | ||
236 | static void uas_log_cmd_state(struct scsi_cmnd *cmnd, const char *caller) | |
237 | { | |
238 | struct uas_cmd_info *ci = (void *)&cmnd->SCp; | |
239 | ||
240 | scmd_printk(KERN_INFO, cmnd, "%s %p tag %d, inflight:" | |
efefecf3 | 241 | "%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", |
b1d67693 GH |
242 | caller, cmnd, cmnd->request->tag, |
243 | (ci->state & SUBMIT_STATUS_URB) ? " s-st" : "", | |
244 | (ci->state & ALLOC_DATA_IN_URB) ? " a-in" : "", | |
245 | (ci->state & SUBMIT_DATA_IN_URB) ? " s-in" : "", | |
246 | (ci->state & ALLOC_DATA_OUT_URB) ? " a-out" : "", | |
247 | (ci->state & SUBMIT_DATA_OUT_URB) ? " s-out" : "", | |
248 | (ci->state & ALLOC_CMD_URB) ? " a-cmd" : "", | |
249 | (ci->state & SUBMIT_CMD_URB) ? " s-cmd" : "", | |
250 | (ci->state & COMMAND_INFLIGHT) ? " CMD" : "", | |
251 | (ci->state & DATA_IN_URB_INFLIGHT) ? " IN" : "", | |
252 | (ci->state & DATA_OUT_URB_INFLIGHT) ? " OUT" : "", | |
ef018cc9 | 253 | (ci->state & COMMAND_COMPLETED) ? " done" : "", |
b06e48af | 254 | (ci->state & COMMAND_ABORTED) ? " abort" : "", |
efefecf3 GH |
255 | (ci->state & UNLINK_DATA_URBS) ? " unlink": "", |
256 | (ci->state & IS_IN_WORK_LIST) ? " work" : ""); | |
b1d67693 GH |
257 | } |
258 | ||
259 | static int uas_try_complete(struct scsi_cmnd *cmnd, const char *caller) | |
260 | { | |
261 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
e0648520 | 262 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
b1d67693 | 263 | |
e0648520 | 264 | WARN_ON(!spin_is_locked(&devinfo->lock)); |
b1d67693 GH |
265 | if (cmdinfo->state & (COMMAND_INFLIGHT | |
266 | DATA_IN_URB_INFLIGHT | | |
b06e48af GH |
267 | DATA_OUT_URB_INFLIGHT | |
268 | UNLINK_DATA_URBS)) | |
b1d67693 GH |
269 | return -EBUSY; |
270 | BUG_ON(cmdinfo->state & COMMAND_COMPLETED); | |
271 | cmdinfo->state |= COMMAND_COMPLETED; | |
272 | usb_free_urb(cmdinfo->data_in_urb); | |
273 | usb_free_urb(cmdinfo->data_out_urb); | |
0871d7d8 GH |
274 | if (cmdinfo->state & COMMAND_ABORTED) { |
275 | scmd_printk(KERN_INFO, cmnd, "abort completed\n"); | |
276 | cmnd->result = DID_ABORT << 16; | |
277 | } | |
c621a81e | 278 | cmnd->scsi_done(cmnd); |
b1d67693 | 279 | return 0; |
115bb1ff MW |
280 | } |
281 | ||
282 | static void uas_xfer_data(struct urb *urb, struct scsi_cmnd *cmnd, | |
b1d67693 | 283 | unsigned direction) |
115bb1ff MW |
284 | { |
285 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
286 | int err; | |
287 | ||
b1d67693 | 288 | cmdinfo->state |= direction | SUBMIT_STATUS_URB; |
115bb1ff MW |
289 | err = uas_submit_urbs(cmnd, cmnd->device->hostdata, GFP_ATOMIC); |
290 | if (err) { | |
291 | spin_lock(&uas_work_lock); | |
292 | list_add_tail(&cmdinfo->list, &uas_work_list); | |
efefecf3 | 293 | cmdinfo->state |= IS_IN_WORK_LIST; |
115bb1ff MW |
294 | spin_unlock(&uas_work_lock); |
295 | schedule_work(&uas_work); | |
296 | } | |
297 | } | |
298 | ||
299 | static void uas_stat_cmplt(struct urb *urb) | |
300 | { | |
301 | struct iu *iu = urb->transfer_buffer; | |
22188f4a SAS |
302 | struct Scsi_Host *shost = urb->context; |
303 | struct uas_dev_info *devinfo = (void *)shost->hostdata[0]; | |
115bb1ff | 304 | struct scsi_cmnd *cmnd; |
b1d67693 | 305 | struct uas_cmd_info *cmdinfo; |
e0648520 | 306 | unsigned long flags; |
115bb1ff MW |
307 | u16 tag; |
308 | ||
309 | if (urb->status) { | |
310 | dev_err(&urb->dev->dev, "URB BAD STATUS %d\n", urb->status); | |
db32de11 | 311 | usb_free_urb(urb); |
115bb1ff MW |
312 | return; |
313 | } | |
314 | ||
023b515e GH |
315 | if (devinfo->resetting) { |
316 | usb_free_urb(urb); | |
317 | return; | |
318 | } | |
319 | ||
e0648520 | 320 | spin_lock_irqsave(&devinfo->lock, flags); |
115bb1ff | 321 | tag = be16_to_cpup(&iu->tag) - 1; |
22188f4a SAS |
322 | if (tag == 0) |
323 | cmnd = devinfo->cmnd; | |
115bb1ff | 324 | else |
22188f4a | 325 | cmnd = scsi_host_find_tag(shost, tag - 1); |
e0423dee | 326 | |
96c1eb98 | 327 | if (!cmnd) { |
e0423dee GH |
328 | if (iu->iu_id == IU_ID_RESPONSE) { |
329 | /* store results for uas_eh_task_mgmt() */ | |
330 | memcpy(&devinfo->response, iu, sizeof(devinfo->response)); | |
023b515e | 331 | } |
e0423dee GH |
332 | usb_free_urb(urb); |
333 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
334 | return; | |
96c1eb98 | 335 | } |
115bb1ff | 336 | |
e0423dee | 337 | cmdinfo = (void *)&cmnd->SCp; |
115bb1ff MW |
338 | switch (iu->iu_id) { |
339 | case IU_ID_STATUS: | |
22188f4a SAS |
340 | if (devinfo->cmnd == cmnd) |
341 | devinfo->cmnd = NULL; | |
342 | ||
115bb1ff MW |
343 | if (urb->actual_length < 16) |
344 | devinfo->uas_sense_old = 1; | |
345 | if (devinfo->uas_sense_old) | |
346 | uas_sense_old(urb, cmnd); | |
347 | else | |
348 | uas_sense(urb, cmnd); | |
8aac863e GH |
349 | if (cmnd->result != 0) { |
350 | /* cancel data transfers on error */ | |
aa8f6123 GH |
351 | spin_unlock_irqrestore(&devinfo->lock, flags); |
352 | uas_unlink_data_urbs(devinfo, cmdinfo); | |
353 | spin_lock_irqsave(&devinfo->lock, flags); | |
8aac863e | 354 | } |
b1d67693 GH |
355 | cmdinfo->state &= ~COMMAND_INFLIGHT; |
356 | uas_try_complete(cmnd, __func__); | |
115bb1ff MW |
357 | break; |
358 | case IU_ID_READ_READY: | |
359 | uas_xfer_data(urb, cmnd, SUBMIT_DATA_IN_URB); | |
360 | break; | |
361 | case IU_ID_WRITE_READY: | |
362 | uas_xfer_data(urb, cmnd, SUBMIT_DATA_OUT_URB); | |
363 | break; | |
364 | default: | |
365 | scmd_printk(KERN_ERR, cmnd, | |
366 | "Bogus IU (%d) received on status pipe\n", iu->iu_id); | |
367 | } | |
e9bd7e1a | 368 | usb_free_urb(urb); |
e0648520 | 369 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
370 | } |
371 | ||
c621a81e | 372 | static void uas_data_cmplt(struct urb *urb) |
115bb1ff | 373 | { |
b1d67693 GH |
374 | struct scsi_cmnd *cmnd = urb->context; |
375 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
e0648520 | 376 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
b1d67693 | 377 | struct scsi_data_buffer *sdb = NULL; |
e0648520 | 378 | unsigned long flags; |
b1d67693 | 379 | |
e0648520 | 380 | spin_lock_irqsave(&devinfo->lock, flags); |
b1d67693 GH |
381 | if (cmdinfo->data_in_urb == urb) { |
382 | sdb = scsi_in(cmnd); | |
383 | cmdinfo->state &= ~DATA_IN_URB_INFLIGHT; | |
384 | } else if (cmdinfo->data_out_urb == urb) { | |
385 | sdb = scsi_out(cmnd); | |
386 | cmdinfo->state &= ~DATA_OUT_URB_INFLIGHT; | |
387 | } | |
388 | BUG_ON(sdb == NULL); | |
8aac863e GH |
389 | if (urb->status) { |
390 | /* error: no data transfered */ | |
391 | sdb->resid = sdb->length; | |
392 | } else { | |
393 | sdb->resid = sdb->length - urb->actual_length; | |
394 | } | |
b1d67693 | 395 | uas_try_complete(cmnd, __func__); |
e0648520 | 396 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
397 | } |
398 | ||
399 | static struct urb *uas_alloc_data_urb(struct uas_dev_info *devinfo, gfp_t gfp, | |
b1d67693 GH |
400 | unsigned int pipe, u16 stream_id, |
401 | struct scsi_cmnd *cmnd, | |
402 | enum dma_data_direction dir) | |
115bb1ff MW |
403 | { |
404 | struct usb_device *udev = devinfo->udev; | |
405 | struct urb *urb = usb_alloc_urb(0, gfp); | |
b1d67693 GH |
406 | struct scsi_data_buffer *sdb = (dir == DMA_FROM_DEVICE) |
407 | ? scsi_in(cmnd) : scsi_out(cmnd); | |
115bb1ff MW |
408 | |
409 | if (!urb) | |
410 | goto out; | |
b1d67693 GH |
411 | usb_fill_bulk_urb(urb, udev, pipe, NULL, sdb->length, |
412 | uas_data_cmplt, cmnd); | |
c621a81e GH |
413 | if (devinfo->use_streams) |
414 | urb->stream_id = stream_id; | |
115bb1ff MW |
415 | urb->num_sgs = udev->bus->sg_tablesize ? sdb->table.nents : 0; |
416 | urb->sg = sdb->table.sgl; | |
417 | out: | |
418 | return urb; | |
419 | } | |
420 | ||
421 | static struct urb *uas_alloc_sense_urb(struct uas_dev_info *devinfo, gfp_t gfp, | |
e9bd7e1a | 422 | struct Scsi_Host *shost, u16 stream_id) |
115bb1ff MW |
423 | { |
424 | struct usb_device *udev = devinfo->udev; | |
425 | struct urb *urb = usb_alloc_urb(0, gfp); | |
426 | struct sense_iu *iu; | |
427 | ||
428 | if (!urb) | |
429 | goto out; | |
430 | ||
ac563cfd | 431 | iu = kzalloc(sizeof(*iu), gfp); |
115bb1ff MW |
432 | if (!iu) |
433 | goto free; | |
434 | ||
435 | usb_fill_bulk_urb(urb, udev, devinfo->status_pipe, iu, sizeof(*iu), | |
e9bd7e1a | 436 | uas_stat_cmplt, shost); |
115bb1ff MW |
437 | urb->stream_id = stream_id; |
438 | urb->transfer_flags |= URB_FREE_BUFFER; | |
439 | out: | |
440 | return urb; | |
441 | free: | |
442 | usb_free_urb(urb); | |
443 | return NULL; | |
444 | } | |
445 | ||
446 | static struct urb *uas_alloc_cmd_urb(struct uas_dev_info *devinfo, gfp_t gfp, | |
447 | struct scsi_cmnd *cmnd, u16 stream_id) | |
448 | { | |
449 | struct usb_device *udev = devinfo->udev; | |
450 | struct scsi_device *sdev = cmnd->device; | |
451 | struct urb *urb = usb_alloc_urb(0, gfp); | |
452 | struct command_iu *iu; | |
453 | int len; | |
454 | ||
455 | if (!urb) | |
456 | goto out; | |
457 | ||
458 | len = cmnd->cmd_len - 16; | |
459 | if (len < 0) | |
460 | len = 0; | |
461 | len = ALIGN(len, 4); | |
ac563cfd | 462 | iu = kzalloc(sizeof(*iu) + len, gfp); |
115bb1ff MW |
463 | if (!iu) |
464 | goto free; | |
465 | ||
466 | iu->iu_id = IU_ID_COMMAND; | |
9eb44541 | 467 | if (blk_rq_tagged(cmnd->request)) |
22188f4a | 468 | iu->tag = cpu_to_be16(cmnd->request->tag + 2); |
9eb44541 SS |
469 | else |
470 | iu->tag = cpu_to_be16(1); | |
02e031cb | 471 | iu->prio_attr = UAS_SIMPLE_TAG; |
115bb1ff MW |
472 | iu->len = len; |
473 | int_to_scsilun(sdev->lun, &iu->lun); | |
474 | memcpy(iu->cdb, cmnd->cmnd, cmnd->cmd_len); | |
475 | ||
476 | usb_fill_bulk_urb(urb, udev, devinfo->cmd_pipe, iu, sizeof(*iu) + len, | |
477 | usb_free_urb, NULL); | |
478 | urb->transfer_flags |= URB_FREE_BUFFER; | |
479 | out: | |
480 | return urb; | |
481 | free: | |
482 | usb_free_urb(urb); | |
483 | return NULL; | |
484 | } | |
485 | ||
023b515e GH |
486 | static int uas_submit_task_urb(struct scsi_cmnd *cmnd, gfp_t gfp, |
487 | u8 function, u16 stream_id) | |
488 | { | |
489 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; | |
490 | struct usb_device *udev = devinfo->udev; | |
491 | struct urb *urb = usb_alloc_urb(0, gfp); | |
492 | struct task_mgmt_iu *iu; | |
493 | int err = -ENOMEM; | |
494 | ||
495 | if (!urb) | |
496 | goto err; | |
497 | ||
498 | iu = kzalloc(sizeof(*iu), gfp); | |
499 | if (!iu) | |
500 | goto err; | |
501 | ||
502 | iu->iu_id = IU_ID_TASK_MGMT; | |
503 | iu->tag = cpu_to_be16(stream_id); | |
504 | int_to_scsilun(cmnd->device->lun, &iu->lun); | |
505 | ||
506 | iu->function = function; | |
507 | switch (function) { | |
508 | case TMF_ABORT_TASK: | |
509 | if (blk_rq_tagged(cmnd->request)) | |
510 | iu->task_tag = cpu_to_be16(cmnd->request->tag + 2); | |
511 | else | |
512 | iu->task_tag = cpu_to_be16(1); | |
513 | break; | |
514 | } | |
515 | ||
516 | usb_fill_bulk_urb(urb, udev, devinfo->cmd_pipe, iu, sizeof(*iu), | |
517 | usb_free_urb, NULL); | |
518 | urb->transfer_flags |= URB_FREE_BUFFER; | |
519 | ||
520 | err = usb_submit_urb(urb, gfp); | |
521 | if (err) | |
522 | goto err; | |
a0e39e34 | 523 | usb_anchor_urb(urb, &devinfo->cmd_urbs); |
023b515e GH |
524 | |
525 | return 0; | |
526 | ||
527 | err: | |
528 | usb_free_urb(urb); | |
529 | return err; | |
530 | } | |
531 | ||
115bb1ff MW |
532 | /* |
533 | * Why should I request the Status IU before sending the Command IU? Spec | |
534 | * says to, but also says the device may receive them in any order. Seems | |
535 | * daft to me. | |
536 | */ | |
537 | ||
e9bd7e1a GH |
538 | static int uas_submit_sense_urb(struct Scsi_Host *shost, |
539 | gfp_t gfp, unsigned int stream) | |
115bb1ff | 540 | { |
e9bd7e1a GH |
541 | struct uas_dev_info *devinfo = (void *)shost->hostdata[0]; |
542 | struct urb *urb; | |
115bb1ff | 543 | |
e9bd7e1a GH |
544 | urb = uas_alloc_sense_urb(devinfo, gfp, shost, stream); |
545 | if (!urb) | |
546 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
547 | if (usb_submit_urb(urb, gfp)) { | |
548 | shost_printk(KERN_INFO, shost, | |
549 | "sense urb submission failure\n"); | |
550 | usb_free_urb(urb); | |
551 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
115bb1ff | 552 | } |
bdd000fb | 553 | usb_anchor_urb(urb, &devinfo->sense_urbs); |
e9bd7e1a GH |
554 | return 0; |
555 | } | |
556 | ||
557 | static int uas_submit_urbs(struct scsi_cmnd *cmnd, | |
558 | struct uas_dev_info *devinfo, gfp_t gfp) | |
559 | { | |
560 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
561 | int err; | |
115bb1ff | 562 | |
e0648520 | 563 | WARN_ON(!spin_is_locked(&devinfo->lock)); |
92a3f767 | 564 | if (cmdinfo->state & SUBMIT_STATUS_URB) { |
e9bd7e1a GH |
565 | err = uas_submit_sense_urb(cmnd->device->host, gfp, |
566 | cmdinfo->stream); | |
567 | if (err) { | |
568 | return err; | |
115bb1ff | 569 | } |
92a3f767 | 570 | cmdinfo->state &= ~SUBMIT_STATUS_URB; |
115bb1ff MW |
571 | } |
572 | ||
573 | if (cmdinfo->state & ALLOC_DATA_IN_URB) { | |
574 | cmdinfo->data_in_urb = uas_alloc_data_urb(devinfo, gfp, | |
c621a81e | 575 | devinfo->data_in_pipe, cmdinfo->stream, |
b1d67693 | 576 | cmnd, DMA_FROM_DEVICE); |
115bb1ff MW |
577 | if (!cmdinfo->data_in_urb) |
578 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
579 | cmdinfo->state &= ~ALLOC_DATA_IN_URB; | |
580 | } | |
581 | ||
582 | if (cmdinfo->state & SUBMIT_DATA_IN_URB) { | |
583 | if (usb_submit_urb(cmdinfo->data_in_urb, gfp)) { | |
584 | scmd_printk(KERN_INFO, cmnd, | |
585 | "data in urb submission failure\n"); | |
586 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
587 | } | |
588 | cmdinfo->state &= ~SUBMIT_DATA_IN_URB; | |
b1d67693 | 589 | cmdinfo->state |= DATA_IN_URB_INFLIGHT; |
bdd000fb | 590 | usb_anchor_urb(cmdinfo->data_in_urb, &devinfo->data_urbs); |
115bb1ff MW |
591 | } |
592 | ||
593 | if (cmdinfo->state & ALLOC_DATA_OUT_URB) { | |
594 | cmdinfo->data_out_urb = uas_alloc_data_urb(devinfo, gfp, | |
c621a81e | 595 | devinfo->data_out_pipe, cmdinfo->stream, |
b1d67693 | 596 | cmnd, DMA_TO_DEVICE); |
115bb1ff MW |
597 | if (!cmdinfo->data_out_urb) |
598 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
599 | cmdinfo->state &= ~ALLOC_DATA_OUT_URB; | |
600 | } | |
601 | ||
602 | if (cmdinfo->state & SUBMIT_DATA_OUT_URB) { | |
603 | if (usb_submit_urb(cmdinfo->data_out_urb, gfp)) { | |
604 | scmd_printk(KERN_INFO, cmnd, | |
605 | "data out urb submission failure\n"); | |
606 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
607 | } | |
608 | cmdinfo->state &= ~SUBMIT_DATA_OUT_URB; | |
b1d67693 | 609 | cmdinfo->state |= DATA_OUT_URB_INFLIGHT; |
bdd000fb | 610 | usb_anchor_urb(cmdinfo->data_out_urb, &devinfo->data_urbs); |
115bb1ff MW |
611 | } |
612 | ||
613 | if (cmdinfo->state & ALLOC_CMD_URB) { | |
614 | cmdinfo->cmd_urb = uas_alloc_cmd_urb(devinfo, gfp, cmnd, | |
a0e39e34 | 615 | cmdinfo->stream); |
115bb1ff MW |
616 | if (!cmdinfo->cmd_urb) |
617 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
618 | cmdinfo->state &= ~ALLOC_CMD_URB; | |
619 | } | |
620 | ||
621 | if (cmdinfo->state & SUBMIT_CMD_URB) { | |
a0e39e34 | 622 | usb_get_urb(cmdinfo->cmd_urb); |
115bb1ff MW |
623 | if (usb_submit_urb(cmdinfo->cmd_urb, gfp)) { |
624 | scmd_printk(KERN_INFO, cmnd, | |
625 | "cmd urb submission failure\n"); | |
626 | return SCSI_MLQUEUE_DEVICE_BUSY; | |
627 | } | |
a0e39e34 GH |
628 | usb_anchor_urb(cmdinfo->cmd_urb, &devinfo->cmd_urbs); |
629 | usb_put_urb(cmdinfo->cmd_urb); | |
630 | cmdinfo->cmd_urb = NULL; | |
115bb1ff | 631 | cmdinfo->state &= ~SUBMIT_CMD_URB; |
b1d67693 | 632 | cmdinfo->state |= COMMAND_INFLIGHT; |
115bb1ff MW |
633 | } |
634 | ||
635 | return 0; | |
636 | } | |
637 | ||
f281233d | 638 | static int uas_queuecommand_lck(struct scsi_cmnd *cmnd, |
115bb1ff MW |
639 | void (*done)(struct scsi_cmnd *)) |
640 | { | |
641 | struct scsi_device *sdev = cmnd->device; | |
642 | struct uas_dev_info *devinfo = sdev->hostdata; | |
643 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; | |
e0648520 | 644 | unsigned long flags; |
115bb1ff MW |
645 | int err; |
646 | ||
647 | BUILD_BUG_ON(sizeof(struct uas_cmd_info) > sizeof(struct scsi_pointer)); | |
648 | ||
f8be6bfc GH |
649 | if (devinfo->resetting) { |
650 | cmnd->result = DID_ERROR << 16; | |
651 | cmnd->scsi_done(cmnd); | |
652 | return 0; | |
653 | } | |
654 | ||
e0648520 GH |
655 | spin_lock_irqsave(&devinfo->lock, flags); |
656 | if (devinfo->cmnd) { | |
657 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
115bb1ff | 658 | return SCSI_MLQUEUE_DEVICE_BUSY; |
e0648520 | 659 | } |
115bb1ff MW |
660 | |
661 | if (blk_rq_tagged(cmnd->request)) { | |
22188f4a | 662 | cmdinfo->stream = cmnd->request->tag + 2; |
115bb1ff | 663 | } else { |
22188f4a | 664 | devinfo->cmnd = cmnd; |
115bb1ff MW |
665 | cmdinfo->stream = 1; |
666 | } | |
667 | ||
668 | cmnd->scsi_done = done; | |
669 | ||
e9bd7e1a | 670 | cmdinfo->state = SUBMIT_STATUS_URB | |
115bb1ff MW |
671 | ALLOC_CMD_URB | SUBMIT_CMD_URB; |
672 | ||
673 | switch (cmnd->sc_data_direction) { | |
674 | case DMA_FROM_DEVICE: | |
675 | cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB; | |
676 | break; | |
677 | case DMA_BIDIRECTIONAL: | |
678 | cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB; | |
679 | case DMA_TO_DEVICE: | |
680 | cmdinfo->state |= ALLOC_DATA_OUT_URB | SUBMIT_DATA_OUT_URB; | |
681 | case DMA_NONE: | |
682 | break; | |
683 | } | |
684 | ||
685 | if (!devinfo->use_streams) { | |
db32de11 | 686 | cmdinfo->state &= ~(SUBMIT_DATA_IN_URB | SUBMIT_DATA_OUT_URB); |
115bb1ff MW |
687 | cmdinfo->stream = 0; |
688 | } | |
689 | ||
690 | err = uas_submit_urbs(cmnd, devinfo, GFP_ATOMIC); | |
691 | if (err) { | |
692 | /* If we did nothing, give up now */ | |
92a3f767 | 693 | if (cmdinfo->state & SUBMIT_STATUS_URB) { |
e0648520 | 694 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
695 | return SCSI_MLQUEUE_DEVICE_BUSY; |
696 | } | |
697 | spin_lock(&uas_work_lock); | |
698 | list_add_tail(&cmdinfo->list, &uas_work_list); | |
efefecf3 | 699 | cmdinfo->state |= IS_IN_WORK_LIST; |
115bb1ff MW |
700 | spin_unlock(&uas_work_lock); |
701 | schedule_work(&uas_work); | |
702 | } | |
703 | ||
e0648520 | 704 | spin_unlock_irqrestore(&devinfo->lock, flags); |
115bb1ff MW |
705 | return 0; |
706 | } | |
707 | ||
f281233d JG |
708 | static DEF_SCSI_QCMD(uas_queuecommand) |
709 | ||
023b515e GH |
710 | static int uas_eh_task_mgmt(struct scsi_cmnd *cmnd, |
711 | const char *fname, u8 function) | |
115bb1ff | 712 | { |
023b515e GH |
713 | struct Scsi_Host *shost = cmnd->device->host; |
714 | struct uas_dev_info *devinfo = (void *)shost->hostdata[0]; | |
03939864 | 715 | u16 tag = devinfo->qdepth - 1; |
e0648520 | 716 | unsigned long flags; |
115bb1ff | 717 | |
e0648520 | 718 | spin_lock_irqsave(&devinfo->lock, flags); |
023b515e | 719 | memset(&devinfo->response, 0, sizeof(devinfo->response)); |
e0648520 | 720 | if (uas_submit_sense_urb(shost, GFP_ATOMIC, tag)) { |
023b515e GH |
721 | shost_printk(KERN_INFO, shost, |
722 | "%s: %s: submit sense urb failed\n", | |
723 | __func__, fname); | |
1994ff40 | 724 | spin_unlock_irqrestore(&devinfo->lock, flags); |
023b515e GH |
725 | return FAILED; |
726 | } | |
e0648520 | 727 | if (uas_submit_task_urb(cmnd, GFP_ATOMIC, function, tag)) { |
023b515e GH |
728 | shost_printk(KERN_INFO, shost, |
729 | "%s: %s: submit task mgmt urb failed\n", | |
730 | __func__, fname); | |
1994ff40 | 731 | spin_unlock_irqrestore(&devinfo->lock, flags); |
023b515e GH |
732 | return FAILED; |
733 | } | |
e0648520 GH |
734 | spin_unlock_irqrestore(&devinfo->lock, flags); |
735 | ||
736 | if (usb_wait_anchor_empty_timeout(&devinfo->sense_urbs, 3000) == 0) { | |
023b515e GH |
737 | shost_printk(KERN_INFO, shost, |
738 | "%s: %s timed out\n", __func__, fname); | |
739 | return FAILED; | |
740 | } | |
741 | if (be16_to_cpu(devinfo->response.tag) != tag) { | |
742 | shost_printk(KERN_INFO, shost, | |
743 | "%s: %s failed (wrong tag %d/%d)\n", __func__, | |
744 | fname, be16_to_cpu(devinfo->response.tag), tag); | |
745 | return FAILED; | |
746 | } | |
747 | if (devinfo->response.response_code != RC_TMF_COMPLETE) { | |
748 | shost_printk(KERN_INFO, shost, | |
749 | "%s: %s failed (rc 0x%x)\n", __func__, | |
750 | fname, devinfo->response.response_code); | |
751 | return FAILED; | |
752 | } | |
753 | return SUCCESS; | |
115bb1ff MW |
754 | } |
755 | ||
023b515e | 756 | static int uas_eh_abort_handler(struct scsi_cmnd *cmnd) |
115bb1ff | 757 | { |
023b515e | 758 | struct uas_cmd_info *cmdinfo = (void *)&cmnd->SCp; |
e0648520 GH |
759 | struct uas_dev_info *devinfo = (void *)cmnd->device->hostdata; |
760 | unsigned long flags; | |
023b515e | 761 | int ret; |
115bb1ff | 762 | |
023b515e | 763 | uas_log_cmd_state(cmnd, __func__); |
e0648520 | 764 | spin_lock_irqsave(&devinfo->lock, flags); |
ef018cc9 | 765 | cmdinfo->state |= COMMAND_ABORTED; |
5d390403 GH |
766 | if (cmdinfo->state & IS_IN_WORK_LIST) { |
767 | spin_lock(&uas_work_lock); | |
768 | list_del(&cmdinfo->list); | |
769 | cmdinfo->state &= ~IS_IN_WORK_LIST; | |
770 | spin_unlock(&uas_work_lock); | |
771 | } | |
772 | if (cmdinfo->state & COMMAND_INFLIGHT) { | |
773 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
774 | ret = uas_eh_task_mgmt(cmnd, "ABORT TASK", TMF_ABORT_TASK); | |
775 | } else { | |
776 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
777 | uas_unlink_data_urbs(devinfo, cmdinfo); | |
778 | spin_lock_irqsave(&devinfo->lock, flags); | |
779 | uas_try_complete(cmnd, __func__); | |
780 | spin_unlock_irqrestore(&devinfo->lock, flags); | |
781 | ret = SUCCESS; | |
782 | } | |
023b515e | 783 | return ret; |
115bb1ff MW |
784 | } |
785 | ||
023b515e | 786 | static int uas_eh_device_reset_handler(struct scsi_cmnd *cmnd) |
115bb1ff | 787 | { |
023b515e GH |
788 | sdev_printk(KERN_INFO, cmnd->device, "%s\n", __func__); |
789 | return uas_eh_task_mgmt(cmnd, "LOGICAL UNIT RESET", | |
790 | TMF_LOGICAL_UNIT_RESET); | |
115bb1ff MW |
791 | } |
792 | ||
793 | static int uas_eh_bus_reset_handler(struct scsi_cmnd *cmnd) | |
794 | { | |
795 | struct scsi_device *sdev = cmnd->device; | |
796 | struct uas_dev_info *devinfo = sdev->hostdata; | |
797 | struct usb_device *udev = devinfo->udev; | |
023b515e | 798 | int err; |
115bb1ff | 799 | |
023b515e | 800 | devinfo->resetting = 1; |
4c456971 | 801 | uas_abort_work(devinfo); |
a0e39e34 | 802 | usb_kill_anchored_urbs(&devinfo->cmd_urbs); |
023b515e GH |
803 | usb_kill_anchored_urbs(&devinfo->sense_urbs); |
804 | usb_kill_anchored_urbs(&devinfo->data_urbs); | |
d89bd835 | 805 | uas_free_streams(devinfo); |
023b515e | 806 | err = usb_reset_device(udev); |
d89bd835 GH |
807 | if (!err) |
808 | uas_configure_endpoints(devinfo); | |
023b515e | 809 | devinfo->resetting = 0; |
115bb1ff | 810 | |
023b515e GH |
811 | if (err) { |
812 | shost_printk(KERN_INFO, sdev->host, "%s FAILED\n", __func__); | |
813 | return FAILED; | |
814 | } | |
115bb1ff | 815 | |
023b515e GH |
816 | shost_printk(KERN_INFO, sdev->host, "%s success\n", __func__); |
817 | return SUCCESS; | |
115bb1ff MW |
818 | } |
819 | ||
820 | static int uas_slave_alloc(struct scsi_device *sdev) | |
821 | { | |
822 | sdev->hostdata = (void *)sdev->host->hostdata[0]; | |
823 | return 0; | |
824 | } | |
825 | ||
826 | static int uas_slave_configure(struct scsi_device *sdev) | |
827 | { | |
828 | struct uas_dev_info *devinfo = sdev->hostdata; | |
829 | scsi_set_tag_type(sdev, MSG_ORDERED_TAG); | |
03939864 | 830 | scsi_activate_tcq(sdev, devinfo->qdepth - 3); |
115bb1ff MW |
831 | return 0; |
832 | } | |
833 | ||
834 | static struct scsi_host_template uas_host_template = { | |
835 | .module = THIS_MODULE, | |
836 | .name = "uas", | |
837 | .queuecommand = uas_queuecommand, | |
838 | .slave_alloc = uas_slave_alloc, | |
839 | .slave_configure = uas_slave_configure, | |
840 | .eh_abort_handler = uas_eh_abort_handler, | |
841 | .eh_device_reset_handler = uas_eh_device_reset_handler, | |
115bb1ff MW |
842 | .eh_bus_reset_handler = uas_eh_bus_reset_handler, |
843 | .can_queue = 65536, /* Is there a limit on the _host_ ? */ | |
844 | .this_id = -1, | |
845 | .sg_tablesize = SG_NONE, | |
846 | .cmd_per_lun = 1, /* until we override it */ | |
847 | .skip_settle_delay = 1, | |
848 | .ordered_tag = 1, | |
849 | }; | |
850 | ||
851 | static struct usb_device_id uas_usb_ids[] = { | |
852 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_BULK) }, | |
853 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, USB_PR_UAS) }, | |
854 | /* 0xaa is a prototype device I happen to have access to */ | |
855 | { USB_INTERFACE_INFO(USB_CLASS_MASS_STORAGE, USB_SC_SCSI, 0xaa) }, | |
856 | { } | |
857 | }; | |
858 | MODULE_DEVICE_TABLE(usb, uas_usb_ids); | |
859 | ||
89dc2905 MW |
860 | static int uas_is_interface(struct usb_host_interface *intf) |
861 | { | |
862 | return (intf->desc.bInterfaceClass == USB_CLASS_MASS_STORAGE && | |
863 | intf->desc.bInterfaceSubClass == USB_SC_SCSI && | |
864 | intf->desc.bInterfaceProtocol == USB_PR_UAS); | |
865 | } | |
866 | ||
c898add5 SAS |
867 | static int uas_isnt_supported(struct usb_device *udev) |
868 | { | |
869 | struct usb_hcd *hcd = bus_to_hcd(udev->bus); | |
870 | ||
871 | dev_warn(&udev->dev, "The driver for the USB controller %s does not " | |
872 | "support scatter-gather which is\n", | |
873 | hcd->driver->description); | |
874 | dev_warn(&udev->dev, "required by the UAS driver. Please try an" | |
875 | "alternative USB controller if you wish to use UAS.\n"); | |
876 | return -ENODEV; | |
877 | } | |
878 | ||
89dc2905 MW |
879 | static int uas_switch_interface(struct usb_device *udev, |
880 | struct usb_interface *intf) | |
881 | { | |
882 | int i; | |
c898add5 | 883 | int sg_supported = udev->bus->sg_tablesize != 0; |
89dc2905 MW |
884 | |
885 | for (i = 0; i < intf->num_altsetting; i++) { | |
886 | struct usb_host_interface *alt = &intf->altsetting[i]; | |
c898add5 SAS |
887 | |
888 | if (uas_is_interface(alt)) { | |
889 | if (!sg_supported) | |
890 | return uas_isnt_supported(udev); | |
89dc2905 MW |
891 | return usb_set_interface(udev, |
892 | alt->desc.bInterfaceNumber, | |
893 | alt->desc.bAlternateSetting); | |
c898add5 | 894 | } |
89dc2905 MW |
895 | } |
896 | ||
897 | return -ENODEV; | |
898 | } | |
899 | ||
115bb1ff MW |
900 | static void uas_configure_endpoints(struct uas_dev_info *devinfo) |
901 | { | |
902 | struct usb_host_endpoint *eps[4] = { }; | |
903 | struct usb_interface *intf = devinfo->intf; | |
904 | struct usb_device *udev = devinfo->udev; | |
905 | struct usb_host_endpoint *endpoint = intf->cur_altsetting->endpoint; | |
906 | unsigned i, n_endpoints = intf->cur_altsetting->desc.bNumEndpoints; | |
907 | ||
908 | devinfo->uas_sense_old = 0; | |
22188f4a | 909 | devinfo->cmnd = NULL; |
115bb1ff MW |
910 | |
911 | for (i = 0; i < n_endpoints; i++) { | |
912 | unsigned char *extra = endpoint[i].extra; | |
913 | int len = endpoint[i].extralen; | |
914 | while (len > 1) { | |
915 | if (extra[1] == USB_DT_PIPE_USAGE) { | |
916 | unsigned pipe_id = extra[2]; | |
917 | if (pipe_id > 0 && pipe_id < 5) | |
918 | eps[pipe_id - 1] = &endpoint[i]; | |
919 | break; | |
920 | } | |
921 | len -= extra[0]; | |
922 | extra += extra[0]; | |
923 | } | |
924 | } | |
925 | ||
926 | /* | |
927 | * Assume that if we didn't find a control pipe descriptor, we're | |
928 | * using a device with old firmware that happens to be set up like | |
929 | * this. | |
930 | */ | |
931 | if (!eps[0]) { | |
932 | devinfo->cmd_pipe = usb_sndbulkpipe(udev, 1); | |
933 | devinfo->status_pipe = usb_rcvbulkpipe(udev, 1); | |
934 | devinfo->data_in_pipe = usb_rcvbulkpipe(udev, 2); | |
935 | devinfo->data_out_pipe = usb_sndbulkpipe(udev, 2); | |
936 | ||
937 | eps[1] = usb_pipe_endpoint(udev, devinfo->status_pipe); | |
938 | eps[2] = usb_pipe_endpoint(udev, devinfo->data_in_pipe); | |
939 | eps[3] = usb_pipe_endpoint(udev, devinfo->data_out_pipe); | |
940 | } else { | |
941 | devinfo->cmd_pipe = usb_sndbulkpipe(udev, | |
942 | eps[0]->desc.bEndpointAddress); | |
943 | devinfo->status_pipe = usb_rcvbulkpipe(udev, | |
944 | eps[1]->desc.bEndpointAddress); | |
945 | devinfo->data_in_pipe = usb_rcvbulkpipe(udev, | |
946 | eps[2]->desc.bEndpointAddress); | |
947 | devinfo->data_out_pipe = usb_sndbulkpipe(udev, | |
948 | eps[3]->desc.bEndpointAddress); | |
949 | } | |
950 | ||
951 | devinfo->qdepth = usb_alloc_streams(devinfo->intf, eps + 1, 3, 256, | |
952 | GFP_KERNEL); | |
953 | if (devinfo->qdepth < 0) { | |
954 | devinfo->qdepth = 256; | |
955 | devinfo->use_streams = 0; | |
956 | } else { | |
957 | devinfo->use_streams = 1; | |
958 | } | |
959 | } | |
960 | ||
dae51546 SAS |
961 | static void uas_free_streams(struct uas_dev_info *devinfo) |
962 | { | |
963 | struct usb_device *udev = devinfo->udev; | |
964 | struct usb_host_endpoint *eps[3]; | |
965 | ||
966 | eps[0] = usb_pipe_endpoint(udev, devinfo->status_pipe); | |
967 | eps[1] = usb_pipe_endpoint(udev, devinfo->data_in_pipe); | |
968 | eps[2] = usb_pipe_endpoint(udev, devinfo->data_out_pipe); | |
969 | usb_free_streams(devinfo->intf, eps, 3, GFP_KERNEL); | |
970 | } | |
971 | ||
115bb1ff MW |
972 | /* |
973 | * XXX: What I'd like to do here is register a SCSI host for each USB host in | |
974 | * the system. Follow usb-storage's design of registering a SCSI host for | |
975 | * each USB device for the moment. Can implement this by walking up the | |
976 | * USB hierarchy until we find a USB host. | |
977 | */ | |
978 | static int uas_probe(struct usb_interface *intf, const struct usb_device_id *id) | |
979 | { | |
980 | int result; | |
981 | struct Scsi_Host *shost; | |
982 | struct uas_dev_info *devinfo; | |
983 | struct usb_device *udev = interface_to_usbdev(intf); | |
984 | ||
89dc2905 MW |
985 | if (uas_switch_interface(udev, intf)) |
986 | return -ENODEV; | |
115bb1ff MW |
987 | |
988 | devinfo = kmalloc(sizeof(struct uas_dev_info), GFP_KERNEL); | |
989 | if (!devinfo) | |
990 | return -ENOMEM; | |
991 | ||
992 | result = -ENOMEM; | |
993 | shost = scsi_host_alloc(&uas_host_template, sizeof(void *)); | |
994 | if (!shost) | |
995 | goto free; | |
996 | ||
997 | shost->max_cmd_len = 16 + 252; | |
998 | shost->max_id = 1; | |
bde027b4 GH |
999 | shost->max_lun = 256; |
1000 | shost->max_channel = 0; | |
115bb1ff MW |
1001 | shost->sg_tablesize = udev->bus->sg_tablesize; |
1002 | ||
115bb1ff MW |
1003 | devinfo->intf = intf; |
1004 | devinfo->udev = udev; | |
023b515e | 1005 | devinfo->resetting = 0; |
a0e39e34 | 1006 | init_usb_anchor(&devinfo->cmd_urbs); |
bdd000fb GH |
1007 | init_usb_anchor(&devinfo->sense_urbs); |
1008 | init_usb_anchor(&devinfo->data_urbs); | |
e0648520 | 1009 | spin_lock_init(&devinfo->lock); |
115bb1ff MW |
1010 | uas_configure_endpoints(devinfo); |
1011 | ||
03939864 | 1012 | result = scsi_init_shared_tag_map(shost, devinfo->qdepth - 3); |
115bb1ff MW |
1013 | if (result) |
1014 | goto free; | |
dae51546 SAS |
1015 | |
1016 | result = scsi_add_host(shost, &intf->dev); | |
1017 | if (result) | |
1018 | goto deconfig_eps; | |
1019 | ||
115bb1ff MW |
1020 | shost->hostdata[0] = (unsigned long)devinfo; |
1021 | ||
115bb1ff MW |
1022 | scsi_scan_host(shost); |
1023 | usb_set_intfdata(intf, shost); | |
1024 | return result; | |
dae51546 SAS |
1025 | |
1026 | deconfig_eps: | |
1027 | uas_free_streams(devinfo); | |
115bb1ff MW |
1028 | free: |
1029 | kfree(devinfo); | |
1030 | if (shost) | |
1031 | scsi_host_put(shost); | |
1032 | return result; | |
1033 | } | |
1034 | ||
1035 | static int uas_pre_reset(struct usb_interface *intf) | |
1036 | { | |
1037 | /* XXX: Need to return 1 if it's not our device in error handling */ | |
1038 | return 0; | |
1039 | } | |
1040 | ||
1041 | static int uas_post_reset(struct usb_interface *intf) | |
1042 | { | |
1043 | /* XXX: Need to return 1 if it's not our device in error handling */ | |
1044 | return 0; | |
1045 | } | |
1046 | ||
1047 | static void uas_disconnect(struct usb_interface *intf) | |
1048 | { | |
115bb1ff MW |
1049 | struct Scsi_Host *shost = usb_get_intfdata(intf); |
1050 | struct uas_dev_info *devinfo = (void *)shost->hostdata[0]; | |
1051 | ||
4c456971 GH |
1052 | devinfo->resetting = 1; |
1053 | uas_abort_work(devinfo); | |
a0e39e34 | 1054 | usb_kill_anchored_urbs(&devinfo->cmd_urbs); |
bdd000fb GH |
1055 | usb_kill_anchored_urbs(&devinfo->sense_urbs); |
1056 | usb_kill_anchored_urbs(&devinfo->data_urbs); | |
4c456971 | 1057 | scsi_remove_host(shost); |
dae51546 | 1058 | uas_free_streams(devinfo); |
115bb1ff MW |
1059 | kfree(devinfo); |
1060 | } | |
1061 | ||
1062 | /* | |
1063 | * XXX: Should this plug into libusual so we can auto-upgrade devices from | |
1064 | * Bulk-Only to UAS? | |
1065 | */ | |
1066 | static struct usb_driver uas_driver = { | |
1067 | .name = "uas", | |
1068 | .probe = uas_probe, | |
1069 | .disconnect = uas_disconnect, | |
1070 | .pre_reset = uas_pre_reset, | |
1071 | .post_reset = uas_post_reset, | |
1072 | .id_table = uas_usb_ids, | |
1073 | }; | |
1074 | ||
65db4305 | 1075 | module_usb_driver(uas_driver); |
115bb1ff MW |
1076 | |
1077 | MODULE_LICENSE("GPL"); | |
1078 | MODULE_AUTHOR("Matthew Wilcox and Sarah Sharp"); |