Commit | Line | Data |
---|---|---|
871f8477 CYC |
1 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
2 | ||
126bb03b AC |
3 | #include <linux/sched.h> |
4 | #include <linux/errno.h> | |
5 | #include <linux/slab.h> | |
6 | ||
7 | #include <scsi/scsi.h> | |
8 | #include <scsi/scsi_eh.h> | |
9 | #include <scsi/scsi_device.h> | |
10 | ||
11 | #include "usb.h" | |
12 | #include "scsiglue.h" | |
13 | #include "transport.h" | |
14 | ||
15 | /*********************************************************************** | |
16 | * Data transfer routines | |
17 | ***********************************************************************/ | |
3aa4fc58 CYC |
18 | /* |
19 | * usb_stor_blocking_completion() | |
20 | */ | |
126bb03b AC |
21 | static void usb_stor_blocking_completion(struct urb *urb) |
22 | { | |
23 | struct completion *urb_done_ptr = urb->context; | |
24 | ||
871f8477 | 25 | /* pr_info("transport --- usb_stor_blocking_completion\n"); */ |
126bb03b AC |
26 | complete(urb_done_ptr); |
27 | } | |
28 | ||
3aa4fc58 CYC |
29 | /* |
30 | * usb_stor_msg_common() | |
31 | */ | |
126bb03b AC |
32 | static int usb_stor_msg_common(struct us_data *us, int timeout) |
33 | { | |
34 | struct completion urb_done; | |
35 | long timeleft; | |
36 | int status; | |
37 | ||
871f8477 | 38 | /* pr_info("transport --- usb_stor_msg_common\n"); */ |
126bb03b AC |
39 | if (test_bit(US_FLIDX_ABORTING, &us->dflags)) |
40 | return -EIO; | |
41 | ||
42 | init_completion(&urb_done); | |
43 | ||
44 | us->current_urb->context = &urb_done; | |
45 | us->current_urb->actual_length = 0; | |
46 | us->current_urb->error_count = 0; | |
47 | us->current_urb->status = 0; | |
48 | ||
307ae1d3 | 49 | us->current_urb->transfer_flags = 0; |
126bb03b AC |
50 | if (us->current_urb->transfer_buffer == us->iobuf) |
51 | us->current_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
52 | us->current_urb->transfer_dma = us->iobuf_dma; | |
53 | us->current_urb->setup_dma = us->cr_dma; | |
54 | ||
55 | status = usb_submit_urb(us->current_urb, GFP_NOIO); | |
56 | if (status) | |
57 | return status; | |
58 | ||
59 | set_bit(US_FLIDX_URB_ACTIVE, &us->dflags); | |
60 | ||
3aa4fc58 CYC |
61 | if (test_bit(US_FLIDX_ABORTING, &us->dflags)) { |
62 | if (test_and_clear_bit(US_FLIDX_URB_ACTIVE, &us->dflags)) { | |
871f8477 | 63 | /* pr_info("-- cancelling URB\n"); */ |
126bb03b AC |
64 | usb_unlink_urb(us->current_urb); |
65 | } | |
66 | } | |
67 | ||
3aa4fc58 CYC |
68 | timeleft = wait_for_completion_interruptible_timeout(&urb_done, |
69 | timeout ? : MAX_SCHEDULE_TIMEOUT); | |
126bb03b AC |
70 | clear_bit(US_FLIDX_URB_ACTIVE, &us->dflags); |
71 | ||
3aa4fc58 | 72 | if (timeleft <= 0) { |
871f8477 CYC |
73 | /* pr_info("%s -- cancelling URB\n", |
74 | timeleft == 0 ? "Timeout" : "Signal"); */ | |
126bb03b AC |
75 | usb_kill_urb(us->current_urb); |
76 | } | |
77 | ||
78 | return us->current_urb->status; | |
79 | } | |
80 | ||
3aa4fc58 CYC |
81 | /* |
82 | * usb_stor_control_msg() | |
83 | */ | |
126bb03b AC |
84 | int usb_stor_control_msg(struct us_data *us, unsigned int pipe, |
85 | u8 request, u8 requesttype, u16 value, u16 index, | |
86 | void *data, u16 size, int timeout) | |
87 | { | |
88 | int status; | |
89 | ||
871f8477 | 90 | /* pr_info("transport --- usb_stor_control_msg\n"); */ |
126bb03b AC |
91 | |
92 | /* fill in the devrequest structure */ | |
93 | us->cr->bRequestType = requesttype; | |
94 | us->cr->bRequest = request; | |
95 | us->cr->wValue = cpu_to_le16(value); | |
96 | us->cr->wIndex = cpu_to_le16(index); | |
97 | us->cr->wLength = cpu_to_le16(size); | |
98 | ||
99 | /* fill and submit the URB */ | |
100 | usb_fill_control_urb(us->current_urb, us->pusb_dev, pipe, | |
3aa4fc58 | 101 | (unsigned char *) us->cr, data, size, |
126bb03b AC |
102 | usb_stor_blocking_completion, NULL); |
103 | status = usb_stor_msg_common(us, timeout); | |
104 | ||
105 | /* return the actual length of the data transferred if no error */ | |
106 | if (status == 0) | |
107 | status = us->current_urb->actual_length; | |
108 | return status; | |
109 | } | |
110 | ||
3aa4fc58 CYC |
111 | /* |
112 | * usb_stor_clear_halt() | |
113 | */ | |
126bb03b AC |
114 | int usb_stor_clear_halt(struct us_data *us, unsigned int pipe) |
115 | { | |
116 | int result; | |
117 | int endp = usb_pipeendpoint(pipe); | |
118 | ||
871f8477 | 119 | /* pr_info("transport --- usb_stor_clear_halt\n"); */ |
3aa4fc58 | 120 | if (usb_pipein(pipe)) |
126bb03b AC |
121 | endp |= USB_DIR_IN; |
122 | ||
123 | result = usb_stor_control_msg(us, us->send_ctrl_pipe, | |
124 | USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, | |
125 | USB_ENDPOINT_HALT, endp, | |
126 | NULL, 0, 3*HZ); | |
127 | ||
128 | /* reset the endpoint toggle */ | |
129 | if (result >= 0) | |
3aa4fc58 CYC |
130 | /* usb_settoggle(us->pusb_dev, usb_pipeendpoint(pipe), |
131 | usb_pipeout(pipe), 0); */ | |
132 | usb_reset_endpoint(us->pusb_dev, endp); | |
126bb03b AC |
133 | |
134 | return result; | |
135 | } | |
136 | ||
3aa4fc58 CYC |
137 | /* |
138 | * interpret_urb_result() | |
139 | */ | |
126bb03b AC |
140 | static int interpret_urb_result(struct us_data *us, unsigned int pipe, |
141 | unsigned int length, int result, unsigned int partial) | |
142 | { | |
871f8477 | 143 | /* pr_info("transport --- interpret_urb_result\n"); */ |
126bb03b AC |
144 | switch (result) { |
145 | /* no error code; did we send all the data? */ | |
146 | case 0: | |
3aa4fc58 | 147 | if (partial != length) { |
871f8477 | 148 | /* pr_info("-- short transfer\n"); */ |
126bb03b AC |
149 | return USB_STOR_XFER_SHORT; |
150 | } | |
871f8477 | 151 | /* pr_info("-- transfer complete\n"); */ |
126bb03b AC |
152 | return USB_STOR_XFER_GOOD; |
153 | case -EPIPE: | |
3aa4fc58 | 154 | if (usb_pipecontrol(pipe)) { |
871f8477 | 155 | /* pr_info("-- stall on control pipe\n"); */ |
126bb03b AC |
156 | return USB_STOR_XFER_STALLED; |
157 | } | |
871f8477 | 158 | /* pr_info("clearing endpoint halt for pipe 0x%x\n", pipe); */ |
126bb03b AC |
159 | if (usb_stor_clear_halt(us, pipe) < 0) |
160 | return USB_STOR_XFER_ERROR; | |
161 | return USB_STOR_XFER_STALLED; | |
162 | case -EOVERFLOW: | |
871f8477 | 163 | /* pr_info("-- babble\n"); */ |
126bb03b AC |
164 | return USB_STOR_XFER_LONG; |
165 | case -ECONNRESET: | |
871f8477 | 166 | /* pr_info("-- transfer cancelled\n"); */ |
126bb03b AC |
167 | return USB_STOR_XFER_ERROR; |
168 | case -EREMOTEIO: | |
871f8477 | 169 | /* pr_info("-- short read transfer\n"); */ |
126bb03b AC |
170 | return USB_STOR_XFER_SHORT; |
171 | case -EIO: | |
871f8477 | 172 | /* pr_info("-- abort or disconnect in progress\n"); */ |
126bb03b AC |
173 | return USB_STOR_XFER_ERROR; |
174 | default: | |
871f8477 | 175 | /* pr_info("-- unknown error\n"); */ |
126bb03b AC |
176 | return USB_STOR_XFER_ERROR; |
177 | } | |
178 | } | |
179 | ||
3aa4fc58 CYC |
180 | /* |
181 | * usb_stor_bulk_transfer_buf() | |
182 | */ | |
126bb03b AC |
183 | int usb_stor_bulk_transfer_buf(struct us_data *us, unsigned int pipe, |
184 | void *buf, unsigned int length, unsigned int *act_len) | |
185 | { | |
186 | int result; | |
187 | ||
871f8477 | 188 | /* pr_info("transport --- usb_stor_bulk_transfer_buf\n"); */ |
126bb03b AC |
189 | |
190 | /* fill and submit the URB */ | |
3aa4fc58 CYC |
191 | usb_fill_bulk_urb(us->current_urb, us->pusb_dev, pipe, buf, |
192 | length, usb_stor_blocking_completion, NULL); | |
126bb03b AC |
193 | result = usb_stor_msg_common(us, 0); |
194 | ||
195 | /* store the actual length of the data transferred */ | |
196 | if (act_len) | |
197 | *act_len = us->current_urb->actual_length; | |
198 | ||
3aa4fc58 CYC |
199 | return interpret_urb_result(us, pipe, length, result, |
200 | us->current_urb->actual_length); | |
126bb03b AC |
201 | } |
202 | ||
3aa4fc58 CYC |
203 | /* |
204 | * usb_stor_bulk_transfer_sglist() | |
205 | */ | |
126bb03b AC |
206 | static int usb_stor_bulk_transfer_sglist(struct us_data *us, unsigned int pipe, |
207 | struct scatterlist *sg, int num_sg, unsigned int length, | |
208 | unsigned int *act_len) | |
209 | { | |
210 | int result; | |
211 | ||
871f8477 | 212 | /* pr_info("transport --- usb_stor_bulk_transfer_sglist\n"); */ |
126bb03b AC |
213 | if (test_bit(US_FLIDX_ABORTING, &us->dflags)) |
214 | return USB_STOR_XFER_ERROR; | |
215 | ||
216 | /* initialize the scatter-gather request block */ | |
3aa4fc58 CYC |
217 | result = usb_sg_init(&us->current_sg, us->pusb_dev, pipe, 0, |
218 | sg, num_sg, length, GFP_NOIO); | |
219 | if (result) { | |
871f8477 | 220 | /* pr_info("usb_sg_init returned %d\n", result); */ |
126bb03b AC |
221 | return USB_STOR_XFER_ERROR; |
222 | } | |
223 | ||
3aa4fc58 CYC |
224 | /* since the block has been initialized successfully, |
225 | it's now okay to cancel it */ | |
126bb03b AC |
226 | set_bit(US_FLIDX_SG_ACTIVE, &us->dflags); |
227 | ||
228 | /* did an abort/disconnect occur during the submission? */ | |
3aa4fc58 | 229 | if (test_bit(US_FLIDX_ABORTING, &us->dflags)) { |
126bb03b | 230 | /* cancel the request, if it hasn't been cancelled already */ |
3aa4fc58 | 231 | if (test_and_clear_bit(US_FLIDX_SG_ACTIVE, &us->dflags)) { |
871f8477 | 232 | /* pr_info("-- cancelling sg request\n"); */ |
126bb03b AC |
233 | usb_sg_cancel(&us->current_sg); |
234 | } | |
235 | } | |
236 | ||
237 | /* wait for the completion of the transfer */ | |
238 | usb_sg_wait(&us->current_sg); | |
239 | clear_bit(US_FLIDX_SG_ACTIVE, &us->dflags); | |
240 | ||
241 | result = us->current_sg.status; | |
242 | if (act_len) | |
243 | *act_len = us->current_sg.bytes; | |
244 | ||
3aa4fc58 CYC |
245 | return interpret_urb_result(us, pipe, length, |
246 | result, us->current_sg.bytes); | |
126bb03b AC |
247 | } |
248 | ||
3aa4fc58 CYC |
249 | /* |
250 | * usb_stor_bulk_srb() | |
251 | */ | |
252 | int usb_stor_bulk_srb(struct us_data *us, unsigned int pipe, | |
253 | struct scsi_cmnd *srb) | |
126bb03b AC |
254 | { |
255 | unsigned int partial; | |
256 | int result = usb_stor_bulk_transfer_sglist(us, pipe, scsi_sglist(srb), | |
257 | scsi_sg_count(srb), scsi_bufflen(srb), | |
258 | &partial); | |
259 | ||
260 | scsi_set_resid(srb, scsi_bufflen(srb) - partial); | |
261 | return result; | |
262 | } | |
263 | ||
3aa4fc58 CYC |
264 | /* |
265 | * usb_stor_bulk_transfer_sg() | |
266 | */ | |
267 | int usb_stor_bulk_transfer_sg(struct us_data *us, unsigned int pipe, | |
126bb03b AC |
268 | void *buf, unsigned int length_left, int use_sg, int *residual) |
269 | { | |
270 | int result; | |
271 | unsigned int partial; | |
272 | ||
871f8477 | 273 | /* pr_info("transport --- usb_stor_bulk_transfer_sg\n"); */ |
126bb03b | 274 | /* are we scatter-gathering? */ |
3aa4fc58 | 275 | if (use_sg) { |
126bb03b AC |
276 | /* use the usb core scatter-gather primitives */ |
277 | result = usb_stor_bulk_transfer_sglist(us, pipe, | |
278 | (struct scatterlist *) buf, use_sg, | |
279 | length_left, &partial); | |
280 | length_left -= partial; | |
3aa4fc58 | 281 | } else { |
126bb03b | 282 | /* no scatter-gather, just make the request */ |
3aa4fc58 CYC |
283 | result = usb_stor_bulk_transfer_buf(us, pipe, buf, |
284 | length_left, &partial); | |
126bb03b AC |
285 | length_left -= partial; |
286 | } | |
287 | ||
288 | /* store the residual and return the error code */ | |
289 | if (residual) | |
290 | *residual = length_left; | |
291 | return result; | |
292 | } | |
293 | ||
294 | /*********************************************************************** | |
295 | * Transport routines | |
296 | ***********************************************************************/ | |
3aa4fc58 CYC |
297 | /* |
298 | * usb_stor_invoke_transport() | |
299 | */ | |
126bb03b AC |
300 | void usb_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us) |
301 | { | |
302 | int need_auto_sense; | |
303 | int result; | |
304 | ||
871f8477 | 305 | /* pr_info("transport --- usb_stor_invoke_transport\n"); */ |
126bb03b AC |
306 | usb_stor_print_cmd(srb); |
307 | /* send the command to the transport layer */ | |
308 | scsi_set_resid(srb, 0); | |
3aa4fc58 CYC |
309 | result = us->transport(srb, us); /* usb_stor_Bulk_transport; */ |
310 | ||
311 | /* if the command gets aborted by the higher layers, | |
312 | we need to short-circuit all other processing */ | |
313 | if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) { | |
871f8477 | 314 | /* pr_info("-- command was aborted\n"); */ |
126bb03b AC |
315 | srb->result = DID_ABORT << 16; |
316 | goto Handle_Errors; | |
317 | } | |
318 | ||
319 | /* if there is a transport error, reset and don't auto-sense */ | |
3aa4fc58 | 320 | if (result == USB_STOR_TRANSPORT_ERROR) { |
871f8477 | 321 | /* pr_info("-- transport indicates error, resetting\n"); */ |
126bb03b AC |
322 | srb->result = DID_ERROR << 16; |
323 | goto Handle_Errors; | |
324 | } | |
325 | ||
326 | /* if the transport provided its own sense data, don't auto-sense */ | |
3aa4fc58 | 327 | if (result == USB_STOR_TRANSPORT_NO_SENSE) { |
126bb03b AC |
328 | srb->result = SAM_STAT_CHECK_CONDITION; |
329 | return; | |
330 | } | |
331 | ||
332 | srb->result = SAM_STAT_GOOD; | |
333 | ||
334 | /* Determine if we need to auto-sense */ | |
335 | need_auto_sense = 0; | |
336 | ||
3aa4fc58 CYC |
337 | if ((us->protocol == USB_PR_CB || us->protocol == USB_PR_DPCM_USB) && |
338 | srb->sc_data_direction != DMA_FROM_DEVICE) { | |
871f8477 | 339 | /* pr_info("-- CB transport device requiring auto-sense\n"); */ |
126bb03b AC |
340 | need_auto_sense = 1; |
341 | } | |
342 | ||
3aa4fc58 | 343 | if (result == USB_STOR_TRANSPORT_FAILED) { |
871f8477 | 344 | /* pr_info("-- transport indicates command failure\n"); */ |
126bb03b AC |
345 | need_auto_sense = 1; |
346 | } | |
347 | ||
348 | /* Now, if we need to do the auto-sense, let's do it */ | |
3aa4fc58 | 349 | if (need_auto_sense) { |
126bb03b AC |
350 | int temp_result; |
351 | struct scsi_eh_save ses; | |
352 | ||
871f8477 | 353 | pr_info("Issuing auto-REQUEST_SENSE\n"); |
126bb03b AC |
354 | |
355 | scsi_eh_prep_cmnd(srb, &ses, NULL, 0, US_SENSE_SIZE); | |
356 | ||
357 | /* we must do the protocol translation here */ | |
3aa4fc58 CYC |
358 | if (us->subclass == USB_SC_RBC || |
359 | us->subclass == USB_SC_SCSI || | |
360 | us->subclass == USB_SC_CYP_ATACB) { | |
126bb03b | 361 | srb->cmd_len = 6; |
3aa4fc58 | 362 | } else { |
126bb03b | 363 | srb->cmd_len = 12; |
3aa4fc58 | 364 | } |
126bb03b AC |
365 | /* issue the auto-sense command */ |
366 | scsi_set_resid(srb, 0); | |
367 | temp_result = us->transport(us->srb, us); | |
368 | ||
369 | /* let's clean up right away */ | |
370 | scsi_eh_restore_cmnd(srb, &ses); | |
371 | ||
3aa4fc58 | 372 | if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) { |
871f8477 | 373 | /* pr_info("-- auto-sense aborted\n"); */ |
126bb03b AC |
374 | srb->result = DID_ABORT << 16; |
375 | goto Handle_Errors; | |
376 | } | |
3aa4fc58 | 377 | if (temp_result != USB_STOR_TRANSPORT_GOOD) { |
871f8477 | 378 | /* pr_info("-- auto-sense failure\n"); */ |
126bb03b AC |
379 | srb->result = DID_ERROR << 16; |
380 | if (!(us->fflags & US_FL_SCM_MULT_TARG)) | |
381 | goto Handle_Errors; | |
382 | return; | |
383 | } | |
384 | ||
385 | /* set the result so the higher layers expect this data */ | |
386 | srb->result = SAM_STAT_CHECK_CONDITION; | |
387 | ||
388 | if (result == USB_STOR_TRANSPORT_GOOD && | |
389 | (srb->sense_buffer[2] & 0xaf) == 0 && | |
390 | srb->sense_buffer[12] == 0 && | |
3aa4fc58 | 391 | srb->sense_buffer[13] == 0) { |
126bb03b AC |
392 | srb->result = SAM_STAT_GOOD; |
393 | srb->sense_buffer[0] = 0x0; | |
394 | } | |
395 | } | |
396 | ||
397 | /* Did we transfer less than the minimum amount required? */ | |
3aa4fc58 CYC |
398 | if (srb->result == SAM_STAT_GOOD && scsi_bufflen(srb) - |
399 | scsi_get_resid(srb) < srb->underflow) | |
400 | srb->result = (DID_ERROR << 16); | |
401 | /* v02 | (SUGGEST_RETRY << 24); */ | |
126bb03b AC |
402 | |
403 | return; | |
404 | ||
405 | Handle_Errors: | |
406 | scsi_lock(us_to_host(us)); | |
407 | set_bit(US_FLIDX_RESETTING, &us->dflags); | |
408 | clear_bit(US_FLIDX_ABORTING, &us->dflags); | |
409 | scsi_unlock(us_to_host(us)); | |
410 | ||
411 | mutex_unlock(&us->dev_mutex); | |
412 | result = usb_stor_port_reset(us); | |
413 | mutex_lock(&us->dev_mutex); | |
414 | ||
3aa4fc58 | 415 | if (result < 0) { |
126bb03b AC |
416 | scsi_lock(us_to_host(us)); |
417 | usb_stor_report_device_reset(us); | |
418 | scsi_unlock(us_to_host(us)); | |
419 | us->transport_reset(us); | |
420 | } | |
421 | clear_bit(US_FLIDX_RESETTING, &us->dflags); | |
422 | } | |
423 | ||
3aa4fc58 CYC |
424 | /* |
425 | * ENE_stor_invoke_transport() | |
426 | */ | |
126bb03b AC |
427 | void ENE_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us) |
428 | { | |
3aa4fc58 | 429 | int result = 0; |
126bb03b | 430 | |
871f8477 | 431 | /* pr_info("transport --- ENE_stor_invoke_transport\n"); */ |
126bb03b AC |
432 | usb_stor_print_cmd(srb); |
433 | /* send the command to the transport layer */ | |
434 | scsi_set_resid(srb, 0); | |
20c3d7f7 | 435 | if (!(us->SM_Status.Ready)) |
126bb03b | 436 | result = ENE_InitMedia(us); |
3aa4fc58 | 437 | |
126bb03b AC |
438 | if (us->Power_IsResum == true) { |
439 | result = ENE_InitMedia(us); | |
3aa4fc58 CYC |
440 | us->Power_IsResum = false; |
441 | } | |
442 | ||
3aa4fc58 CYC |
443 | if (us->SM_Status.Ready) |
444 | result = SM_SCSIIrp(us, srb); | |
445 | ||
446 | /* if the command gets aborted by the higher layers, | |
447 | we need to short-circuit all other processing */ | |
448 | if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) { | |
871f8477 | 449 | /* pr_info("-- command was aborted\n"); */ |
126bb03b AC |
450 | srb->result = DID_ABORT << 16; |
451 | goto Handle_Errors; | |
452 | } | |
453 | ||
454 | /* if there is a transport error, reset and don't auto-sense */ | |
3aa4fc58 | 455 | if (result == USB_STOR_TRANSPORT_ERROR) { |
871f8477 | 456 | /* pr_info("-- transport indicates error, resetting\n"); */ |
126bb03b AC |
457 | srb->result = DID_ERROR << 16; |
458 | goto Handle_Errors; | |
459 | } | |
460 | ||
461 | /* if the transport provided its own sense data, don't auto-sense */ | |
3aa4fc58 | 462 | if (result == USB_STOR_TRANSPORT_NO_SENSE) { |
126bb03b AC |
463 | srb->result = SAM_STAT_CHECK_CONDITION; |
464 | return; | |
465 | } | |
466 | ||
467 | srb->result = SAM_STAT_GOOD; | |
3aa4fc58 | 468 | if (result == USB_STOR_TRANSPORT_FAILED) { |
871f8477 | 469 | /* pr_info("-- transport indicates command failure\n"); */ |
3aa4fc58 | 470 | /* need_auto_sense = 1; */ |
126bb03b AC |
471 | BuildSenseBuffer(srb, us->SrbStatus); |
472 | srb->result = SAM_STAT_CHECK_CONDITION; | |
473 | } | |
474 | ||
475 | /* Did we transfer less than the minimum amount required? */ | |
3aa4fc58 CYC |
476 | if (srb->result == SAM_STAT_GOOD && scsi_bufflen(srb) - |
477 | scsi_get_resid(srb) < srb->underflow) | |
478 | srb->result = (DID_ERROR << 16); | |
479 | /* v02 | (SUGGEST_RETRY << 24); */ | |
126bb03b AC |
480 | |
481 | return; | |
482 | ||
483 | Handle_Errors: | |
484 | scsi_lock(us_to_host(us)); | |
485 | set_bit(US_FLIDX_RESETTING, &us->dflags); | |
486 | clear_bit(US_FLIDX_ABORTING, &us->dflags); | |
487 | scsi_unlock(us_to_host(us)); | |
488 | ||
489 | mutex_unlock(&us->dev_mutex); | |
490 | result = usb_stor_port_reset(us); | |
491 | mutex_lock(&us->dev_mutex); | |
492 | ||
3aa4fc58 | 493 | if (result < 0) { |
126bb03b AC |
494 | scsi_lock(us_to_host(us)); |
495 | usb_stor_report_device_reset(us); | |
496 | scsi_unlock(us_to_host(us)); | |
497 | us->transport_reset(us); | |
498 | } | |
499 | clear_bit(US_FLIDX_RESETTING, &us->dflags); | |
500 | } | |
501 | ||
3aa4fc58 CYC |
502 | /* |
503 | * BuildSenseBuffer() | |
504 | */ | |
126bb03b AC |
505 | void BuildSenseBuffer(struct scsi_cmnd *srb, int SrbStatus) |
506 | { | |
3aa4fc58 CYC |
507 | BYTE *buf = srb->sense_buffer; |
508 | BYTE asc; | |
126bb03b | 509 | |
871f8477 | 510 | pr_info("transport --- BuildSenseBuffer\n"); |
3aa4fc58 CYC |
511 | switch (SrbStatus) { |
512 | case SS_NOT_READY: | |
513 | asc = 0x3a; | |
514 | break; /* sense key = 0x02 */ | |
515 | case SS_MEDIUM_ERR: | |
516 | asc = 0x0c; | |
517 | break; /* sense key = 0x03 */ | |
518 | case SS_ILLEGAL_REQUEST: | |
519 | asc = 0x20; | |
520 | break; /* sense key = 0x05 */ | |
521 | default: | |
522 | asc = 0x00; | |
523 | break; /* ?? */ | |
524 | } | |
525 | ||
526 | memset(buf, 0, 18); | |
527 | buf[0x00] = 0xf0; | |
528 | buf[0x02] = SrbStatus; | |
529 | buf[0x07] = 0x0b; | |
530 | buf[0x0c] = asc; | |
126bb03b AC |
531 | } |
532 | ||
3aa4fc58 CYC |
533 | /* |
534 | * usb_stor_stop_transport() | |
535 | */ | |
126bb03b AC |
536 | void usb_stor_stop_transport(struct us_data *us) |
537 | { | |
871f8477 | 538 | /* pr_info("transport --- usb_stor_stop_transport\n"); */ |
126bb03b | 539 | |
3aa4fc58 | 540 | if (test_and_clear_bit(US_FLIDX_URB_ACTIVE, &us->dflags)) { |
871f8477 | 541 | /* pr_info("-- cancelling URB\n"); */ |
126bb03b AC |
542 | usb_unlink_urb(us->current_urb); |
543 | } | |
544 | ||
3aa4fc58 | 545 | if (test_and_clear_bit(US_FLIDX_SG_ACTIVE, &us->dflags)) { |
871f8477 | 546 | /* pr_info("-- cancelling sg request\n"); */ |
126bb03b AC |
547 | usb_sg_cancel(&us->current_sg); |
548 | } | |
549 | } | |
550 | ||
3aa4fc58 CYC |
551 | /* |
552 | * usb_stor_Bulk_max_lun() | |
553 | */ | |
126bb03b AC |
554 | int usb_stor_Bulk_max_lun(struct us_data *us) |
555 | { | |
556 | int result; | |
557 | ||
871f8477 | 558 | /* pr_info("transport --- usb_stor_Bulk_max_lun\n"); */ |
126bb03b AC |
559 | /* issue the command */ |
560 | us->iobuf[0] = 0; | |
561 | result = usb_stor_control_msg(us, us->recv_ctrl_pipe, | |
562 | US_BULK_GET_MAX_LUN, | |
563 | USB_DIR_IN | USB_TYPE_CLASS | | |
564 | USB_RECIP_INTERFACE, | |
565 | 0, us->ifnum, us->iobuf, 1, HZ); | |
566 | ||
871f8477 CYC |
567 | /* pr_info("GetMaxLUN command result is %d, data is %d\n", |
568 | result, us->iobuf[0]); */ | |
126bb03b AC |
569 | |
570 | /* if we have a successful request, return the result */ | |
571 | if (result > 0) | |
572 | return us->iobuf[0]; | |
573 | ||
574 | return 0; | |
575 | } | |
576 | ||
3aa4fc58 CYC |
577 | /* |
578 | * usb_stor_Bulk_transport() | |
579 | */ | |
126bb03b AC |
580 | int usb_stor_Bulk_transport(struct scsi_cmnd *srb, struct us_data *us) |
581 | { | |
582 | struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf; | |
583 | struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap *) us->iobuf; | |
584 | unsigned int transfer_length = scsi_bufflen(srb); | |
585 | unsigned int residue; | |
586 | int result; | |
587 | int fake_sense = 0; | |
588 | unsigned int cswlen; | |
589 | unsigned int cbwlen = US_BULK_CB_WRAP_LEN; | |
590 | ||
871f8477 | 591 | /* pr_info("transport --- usb_stor_Bulk_transport\n"); */ |
126bb03b | 592 | /* Take care of BULK32 devices; set extra byte to 0 */ |
3aa4fc58 | 593 | if (unlikely(us->fflags & US_FL_BULK32)) { |
126bb03b AC |
594 | cbwlen = 32; |
595 | us->iobuf[31] = 0; | |
596 | } | |
597 | ||
598 | /* set up the command wrapper */ | |
599 | bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN); | |
600 | bcb->DataTransferLength = cpu_to_le32(transfer_length); | |
601 | bcb->Flags = srb->sc_data_direction == DMA_FROM_DEVICE ? 1 << 7 : 0; | |
602 | bcb->Tag = ++us->tag; | |
603 | bcb->Lun = srb->device->lun; | |
604 | if (us->fflags & US_FL_SCM_MULT_TARG) | |
605 | bcb->Lun |= srb->device->id << 4; | |
606 | bcb->Length = srb->cmd_len; | |
607 | ||
608 | /* copy the command payload */ | |
609 | memset(bcb->CDB, 0, sizeof(bcb->CDB)); | |
610 | memcpy(bcb->CDB, srb->cmnd, bcb->Length); | |
611 | ||
3aa4fc58 | 612 | /* send command */ |
126bb03b | 613 | /* send it to out endpoint */ |
871f8477 | 614 | /* pr_info("Bulk Command S 0x%x T 0x%x L %d F %d Trg %d LUN %d CL %d\n", |
126bb03b AC |
615 | le32_to_cpu(bcb->Signature), bcb->Tag, |
616 | le32_to_cpu(bcb->DataTransferLength), bcb->Flags, | |
617 | (bcb->Lun >> 4), (bcb->Lun & 0x0F), | |
871f8477 | 618 | bcb->Length); */ |
3aa4fc58 CYC |
619 | result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, |
620 | bcb, cbwlen, NULL); | |
871f8477 | 621 | /* pr_info("Bulk command transfer result=%d\n", result); */ |
126bb03b AC |
622 | if (result != USB_STOR_XFER_GOOD) |
623 | return USB_STOR_TRANSPORT_ERROR; | |
624 | ||
625 | if (unlikely(us->fflags & US_FL_GO_SLOW)) | |
626 | udelay(125); | |
627 | ||
3aa4fc58 CYC |
628 | /* R/W data */ |
629 | if (transfer_length) { | |
d48e5cff CYC |
630 | unsigned int pipe; |
631 | if (srb->sc_data_direction == DMA_FROM_DEVICE) | |
632 | pipe = us->recv_bulk_pipe; | |
633 | else | |
634 | pipe = us->send_bulk_pipe; | |
635 | ||
126bb03b | 636 | result = usb_stor_bulk_srb(us, pipe, srb); |
871f8477 | 637 | /* pr_info("Bulk data transfer result 0x%x\n", result); */ |
126bb03b AC |
638 | if (result == USB_STOR_XFER_ERROR) |
639 | return USB_STOR_TRANSPORT_ERROR; | |
640 | ||
641 | if (result == USB_STOR_XFER_LONG) | |
642 | fake_sense = 1; | |
643 | } | |
644 | ||
645 | /* get CSW for device status */ | |
871f8477 | 646 | /* pr_info("Attempting to get CSW...\n"); */ |
3aa4fc58 CYC |
647 | result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs, |
648 | US_BULK_CS_WRAP_LEN, &cswlen); | |
126bb03b | 649 | |
3aa4fc58 | 650 | if (result == USB_STOR_XFER_SHORT && cswlen == 0) { |
871f8477 | 651 | /* pr_info("Received 0-length CSW; retrying...\n"); */ |
3aa4fc58 CYC |
652 | result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs, |
653 | US_BULK_CS_WRAP_LEN, &cswlen); | |
126bb03b AC |
654 | } |
655 | ||
656 | /* did the attempt to read the CSW fail? */ | |
3aa4fc58 | 657 | if (result == USB_STOR_XFER_STALLED) { |
126bb03b | 658 | /* get the status again */ |
871f8477 | 659 | /* pr_info("Attempting to get CSW (2nd try)...\n"); */ |
3aa4fc58 CYC |
660 | result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs, |
661 | US_BULK_CS_WRAP_LEN, NULL); | |
126bb03b AC |
662 | } |
663 | ||
664 | /* if we still have a failure at this point, we're in trouble */ | |
871f8477 | 665 | /* pr_info("Bulk status result = %d\n", result); */ |
126bb03b AC |
666 | if (result != USB_STOR_XFER_GOOD) |
667 | return USB_STOR_TRANSPORT_ERROR; | |
668 | ||
669 | /* check bulk status */ | |
670 | residue = le32_to_cpu(bcs->Residue); | |
871f8477 CYC |
671 | /* pr_info("Bulk Status S 0x%x T 0x%x R %u Stat 0x%x\n", |
672 | le32_to_cpu(bcs->Signature), | |
673 | bcs->Tag, residue, bcs->Status); */ | |
3aa4fc58 CYC |
674 | if (!(bcs->Tag == us->tag || |
675 | (us->fflags & US_FL_BULK_IGNORE_TAG)) || | |
676 | bcs->Status > US_BULK_STAT_PHASE) { | |
871f8477 | 677 | /* pr_info("Bulk logical error\n"); */ |
126bb03b AC |
678 | return USB_STOR_TRANSPORT_ERROR; |
679 | } | |
680 | ||
3aa4fc58 | 681 | if (!us->bcs_signature) { |
126bb03b | 682 | us->bcs_signature = bcs->Signature; |
3aa4fc58 | 683 | /* if (us->bcs_signature != cpu_to_le32(US_BULK_CS_SIGN)) */ |
871f8477 CYC |
684 | /* pr_info("Learnt BCS signature 0x%08X\n", |
685 | le32_to_cpu(us->bcs_signature)); */ | |
3aa4fc58 | 686 | } else if (bcs->Signature != us->bcs_signature) { |
871f8477 | 687 | /* pr_info("Signature mismatch: got %08X, expecting %08X\n", |
126bb03b | 688 | le32_to_cpu(bcs->Signature), |
871f8477 | 689 | le32_to_cpu(us->bcs_signature)); */ |
126bb03b AC |
690 | return USB_STOR_TRANSPORT_ERROR; |
691 | } | |
692 | ||
693 | /* try to compute the actual residue, based on how much data | |
694 | * was really transferred and what the device tells us */ | |
3aa4fc58 | 695 | if (residue && !(us->fflags & US_FL_IGNORE_RESIDUE)) { |
126bb03b AC |
696 | |
697 | /* Heuristically detect devices that generate bogus residues | |
698 | * by seeing what happens with INQUIRY and READ CAPACITY | |
699 | * commands. | |
700 | */ | |
701 | if (bcs->Status == US_BULK_STAT_OK && | |
702 | scsi_get_resid(srb) == 0 && | |
703 | ((srb->cmnd[0] == INQUIRY && | |
704 | transfer_length == 36) || | |
705 | (srb->cmnd[0] == READ_CAPACITY && | |
3aa4fc58 | 706 | transfer_length == 8))) { |
126bb03b AC |
707 | us->fflags |= US_FL_IGNORE_RESIDUE; |
708 | ||
3aa4fc58 | 709 | } else { |
126bb03b | 710 | residue = min(residue, transfer_length); |
3aa4fc58 CYC |
711 | scsi_set_resid(srb, max(scsi_get_resid(srb), |
712 | (int) residue)); | |
126bb03b AC |
713 | } |
714 | } | |
715 | ||
716 | /* based on the status code, we report good or bad */ | |
3aa4fc58 CYC |
717 | switch (bcs->Status) { |
718 | case US_BULK_STAT_OK: | |
719 | if (fake_sense) { | |
720 | memcpy(srb->sense_buffer, usb_stor_sense_invalidCDB, | |
721 | sizeof(usb_stor_sense_invalidCDB)); | |
722 | return USB_STOR_TRANSPORT_NO_SENSE; | |
723 | } | |
724 | return USB_STOR_TRANSPORT_GOOD; | |
725 | ||
726 | case US_BULK_STAT_FAIL: | |
727 | return USB_STOR_TRANSPORT_FAILED; | |
728 | ||
729 | case US_BULK_STAT_PHASE: | |
730 | return USB_STOR_TRANSPORT_ERROR; | |
126bb03b AC |
731 | } |
732 | return USB_STOR_TRANSPORT_ERROR; | |
733 | } | |
734 | ||
735 | /*********************************************************************** | |
736 | * Reset routines | |
737 | ***********************************************************************/ | |
3aa4fc58 CYC |
738 | /* |
739 | * usb_stor_reset_common() | |
740 | */ | |
126bb03b AC |
741 | static int usb_stor_reset_common(struct us_data *us, |
742 | u8 request, u8 requesttype, | |
743 | u16 value, u16 index, void *data, u16 size) | |
744 | { | |
745 | int result; | |
746 | int result2; | |
747 | ||
871f8477 | 748 | /* pr_info("transport --- usb_stor_reset_common\n"); */ |
3aa4fc58 | 749 | if (test_bit(US_FLIDX_DISCONNECTING, &us->dflags)) { |
871f8477 | 750 | /* pr_info("No reset during disconnect\n"); */ |
126bb03b AC |
751 | return -EIO; |
752 | } | |
753 | ||
3aa4fc58 CYC |
754 | result = usb_stor_control_msg(us, us->send_ctrl_pipe, |
755 | request, requesttype, value, index, data, size, 5*HZ); | |
756 | ||
757 | if (result < 0) { | |
871f8477 | 758 | /* pr_info("Soft reset failed: %d\n", result); */ |
126bb03b AC |
759 | return result; |
760 | } | |
761 | ||
3aa4fc58 CYC |
762 | wait_event_interruptible_timeout(us->delay_wait, |
763 | test_bit(US_FLIDX_DISCONNECTING, &us->dflags), HZ*6); | |
764 | ||
765 | if (test_bit(US_FLIDX_DISCONNECTING, &us->dflags)) { | |
871f8477 | 766 | /* pr_info("Reset interrupted by disconnect\n"); */ |
126bb03b AC |
767 | return -EIO; |
768 | } | |
769 | ||
871f8477 | 770 | /* pr_info("Soft reset: clearing bulk-in endpoint halt\n"); */ |
126bb03b AC |
771 | result = usb_stor_clear_halt(us, us->recv_bulk_pipe); |
772 | ||
871f8477 | 773 | /* pr_info("Soft reset: clearing bulk-out endpoint halt\n"); */ |
126bb03b AC |
774 | result2 = usb_stor_clear_halt(us, us->send_bulk_pipe); |
775 | ||
776 | /* return a result code based on the result of the clear-halts */ | |
777 | if (result >= 0) | |
778 | result = result2; | |
3aa4fc58 | 779 | /* if (result < 0) */ |
871f8477 | 780 | /* pr_info("Soft reset failed\n"); */ |
3aa4fc58 | 781 | /* else */ |
871f8477 | 782 | /* pr_info("Soft reset done\n"); */ |
126bb03b AC |
783 | return result; |
784 | } | |
785 | ||
3aa4fc58 CYC |
786 | /* |
787 | * usb_stor_Bulk_reset() | |
788 | */ | |
126bb03b AC |
789 | int usb_stor_Bulk_reset(struct us_data *us) |
790 | { | |
871f8477 | 791 | /* pr_info("transport --- usb_stor_Bulk_reset\n"); */ |
126bb03b AC |
792 | return usb_stor_reset_common(us, US_BULK_RESET_REQUEST, |
793 | USB_TYPE_CLASS | USB_RECIP_INTERFACE, | |
794 | 0, us->ifnum, NULL, 0); | |
795 | } | |
796 | ||
3aa4fc58 CYC |
797 | /* |
798 | * usb_stor_port_reset() | |
799 | */ | |
126bb03b AC |
800 | int usb_stor_port_reset(struct us_data *us) |
801 | { | |
a200adb1 | 802 | int result; |
126bb03b | 803 | |
871f8477 | 804 | /* pr_info("transport --- usb_stor_port_reset\n"); */ |
e1049604 | 805 | result = usb_lock_device_for_reset(us->pusb_dev, us->pusb_intf); |
126bb03b | 806 | if (result < 0) |
871f8477 | 807 | pr_info("unable to lock device for reset: %d\n", result); |
e1049604 | 808 | else { |
126bb03b | 809 | /* Were we disconnected while waiting for the lock? */ |
e1049604 | 810 | if (test_bit(US_FLIDX_DISCONNECTING, &us->dflags)) { |
126bb03b | 811 | result = -EIO; |
871f8477 | 812 | /* pr_info("No reset during disconnect\n"); */ |
e1049604 | 813 | } else { |
126bb03b | 814 | result = usb_reset_device(us->pusb_dev); |
871f8477 CYC |
815 | /* pr_info("usb_reset_composite_device returns %d\n", |
816 | result); */ | |
126bb03b | 817 | } |
e1049604 | 818 | usb_unlock_device(us->pusb_dev); |
126bb03b AC |
819 | } |
820 | return result; | |
821 | } | |
822 | ||
823 |