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Commit | Line | Data |
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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 | ||
eecb3c07 LL |
81 | /* |
82 | * usb_stor_print_cmd(): | |
83 | */ | |
84 | static void usb_stor_print_cmd(struct us_data *us, struct scsi_cmnd *srb) | |
85 | { | |
86 | PBYTE Cdb = srb->cmnd; | |
87 | DWORD cmd = Cdb[0]; | |
eecb3c07 LL |
88 | |
89 | switch (cmd) { | |
90 | case TEST_UNIT_READY: | |
eecb3c07 LL |
91 | break; |
92 | case INQUIRY: | |
0ea8a165 JS |
93 | dev_dbg(&us->pusb_dev->dev, |
94 | "scsi cmd %X --- SCSIOP_INQUIRY\n", cmd); | |
eecb3c07 LL |
95 | break; |
96 | case MODE_SENSE: | |
0ea8a165 JS |
97 | dev_dbg(&us->pusb_dev->dev, |
98 | "scsi cmd %X --- SCSIOP_MODE_SENSE\n", cmd); | |
eecb3c07 LL |
99 | break; |
100 | case START_STOP: | |
0ea8a165 JS |
101 | dev_dbg(&us->pusb_dev->dev, |
102 | "scsi cmd %X --- SCSIOP_START_STOP\n", cmd); | |
eecb3c07 LL |
103 | break; |
104 | case READ_CAPACITY: | |
0ea8a165 JS |
105 | dev_dbg(&us->pusb_dev->dev, |
106 | "scsi cmd %X --- SCSIOP_READ_CAPACITY\n", cmd); | |
eecb3c07 LL |
107 | break; |
108 | case READ_10: | |
eecb3c07 LL |
109 | break; |
110 | case WRITE_10: | |
eecb3c07 LL |
111 | break; |
112 | case ALLOW_MEDIUM_REMOVAL: | |
0ea8a165 JS |
113 | dev_dbg(&us->pusb_dev->dev, |
114 | "scsi cmd %X --- SCSIOP_ALLOW_MEDIUM_REMOVAL\n", cmd); | |
eecb3c07 LL |
115 | break; |
116 | default: | |
117 | dev_dbg(&us->pusb_dev->dev, "scsi cmd %X --- Other cmd\n", cmd); | |
118 | break; | |
119 | } | |
eecb3c07 LL |
120 | } |
121 | ||
3aa4fc58 CYC |
122 | /* |
123 | * usb_stor_control_msg() | |
124 | */ | |
126bb03b AC |
125 | int usb_stor_control_msg(struct us_data *us, unsigned int pipe, |
126 | u8 request, u8 requesttype, u16 value, u16 index, | |
127 | void *data, u16 size, int timeout) | |
128 | { | |
129 | int status; | |
130 | ||
871f8477 | 131 | /* pr_info("transport --- usb_stor_control_msg\n"); */ |
126bb03b AC |
132 | |
133 | /* fill in the devrequest structure */ | |
134 | us->cr->bRequestType = requesttype; | |
135 | us->cr->bRequest = request; | |
136 | us->cr->wValue = cpu_to_le16(value); | |
137 | us->cr->wIndex = cpu_to_le16(index); | |
138 | us->cr->wLength = cpu_to_le16(size); | |
139 | ||
140 | /* fill and submit the URB */ | |
141 | usb_fill_control_urb(us->current_urb, us->pusb_dev, pipe, | |
3aa4fc58 | 142 | (unsigned char *) us->cr, data, size, |
126bb03b AC |
143 | usb_stor_blocking_completion, NULL); |
144 | status = usb_stor_msg_common(us, timeout); | |
145 | ||
146 | /* return the actual length of the data transferred if no error */ | |
147 | if (status == 0) | |
148 | status = us->current_urb->actual_length; | |
149 | return status; | |
150 | } | |
151 | ||
3aa4fc58 CYC |
152 | /* |
153 | * usb_stor_clear_halt() | |
154 | */ | |
126bb03b AC |
155 | int usb_stor_clear_halt(struct us_data *us, unsigned int pipe) |
156 | { | |
157 | int result; | |
158 | int endp = usb_pipeendpoint(pipe); | |
159 | ||
871f8477 | 160 | /* pr_info("transport --- usb_stor_clear_halt\n"); */ |
3aa4fc58 | 161 | if (usb_pipein(pipe)) |
126bb03b AC |
162 | endp |= USB_DIR_IN; |
163 | ||
164 | result = usb_stor_control_msg(us, us->send_ctrl_pipe, | |
165 | USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, | |
166 | USB_ENDPOINT_HALT, endp, | |
167 | NULL, 0, 3*HZ); | |
168 | ||
169 | /* reset the endpoint toggle */ | |
170 | if (result >= 0) | |
3aa4fc58 CYC |
171 | /* usb_settoggle(us->pusb_dev, usb_pipeendpoint(pipe), |
172 | usb_pipeout(pipe), 0); */ | |
173 | usb_reset_endpoint(us->pusb_dev, endp); | |
126bb03b AC |
174 | |
175 | return result; | |
176 | } | |
177 | ||
3aa4fc58 CYC |
178 | /* |
179 | * interpret_urb_result() | |
180 | */ | |
126bb03b AC |
181 | static int interpret_urb_result(struct us_data *us, unsigned int pipe, |
182 | unsigned int length, int result, unsigned int partial) | |
183 | { | |
871f8477 | 184 | /* pr_info("transport --- interpret_urb_result\n"); */ |
126bb03b AC |
185 | switch (result) { |
186 | /* no error code; did we send all the data? */ | |
187 | case 0: | |
3aa4fc58 | 188 | if (partial != length) { |
871f8477 | 189 | /* pr_info("-- short transfer\n"); */ |
126bb03b AC |
190 | return USB_STOR_XFER_SHORT; |
191 | } | |
871f8477 | 192 | /* pr_info("-- transfer complete\n"); */ |
126bb03b AC |
193 | return USB_STOR_XFER_GOOD; |
194 | case -EPIPE: | |
3aa4fc58 | 195 | if (usb_pipecontrol(pipe)) { |
871f8477 | 196 | /* pr_info("-- stall on control pipe\n"); */ |
126bb03b AC |
197 | return USB_STOR_XFER_STALLED; |
198 | } | |
871f8477 | 199 | /* pr_info("clearing endpoint halt for pipe 0x%x\n", pipe); */ |
126bb03b AC |
200 | if (usb_stor_clear_halt(us, pipe) < 0) |
201 | return USB_STOR_XFER_ERROR; | |
202 | return USB_STOR_XFER_STALLED; | |
203 | case -EOVERFLOW: | |
871f8477 | 204 | /* pr_info("-- babble\n"); */ |
126bb03b AC |
205 | return USB_STOR_XFER_LONG; |
206 | case -ECONNRESET: | |
871f8477 | 207 | /* pr_info("-- transfer cancelled\n"); */ |
126bb03b AC |
208 | return USB_STOR_XFER_ERROR; |
209 | case -EREMOTEIO: | |
871f8477 | 210 | /* pr_info("-- short read transfer\n"); */ |
126bb03b AC |
211 | return USB_STOR_XFER_SHORT; |
212 | case -EIO: | |
871f8477 | 213 | /* pr_info("-- abort or disconnect in progress\n"); */ |
126bb03b AC |
214 | return USB_STOR_XFER_ERROR; |
215 | default: | |
871f8477 | 216 | /* pr_info("-- unknown error\n"); */ |
126bb03b AC |
217 | return USB_STOR_XFER_ERROR; |
218 | } | |
219 | } | |
220 | ||
3aa4fc58 CYC |
221 | /* |
222 | * usb_stor_bulk_transfer_buf() | |
223 | */ | |
126bb03b AC |
224 | int usb_stor_bulk_transfer_buf(struct us_data *us, unsigned int pipe, |
225 | void *buf, unsigned int length, unsigned int *act_len) | |
226 | { | |
227 | int result; | |
228 | ||
871f8477 | 229 | /* pr_info("transport --- usb_stor_bulk_transfer_buf\n"); */ |
126bb03b AC |
230 | |
231 | /* fill and submit the URB */ | |
3aa4fc58 CYC |
232 | usb_fill_bulk_urb(us->current_urb, us->pusb_dev, pipe, buf, |
233 | length, usb_stor_blocking_completion, NULL); | |
126bb03b AC |
234 | result = usb_stor_msg_common(us, 0); |
235 | ||
236 | /* store the actual length of the data transferred */ | |
237 | if (act_len) | |
238 | *act_len = us->current_urb->actual_length; | |
239 | ||
3aa4fc58 CYC |
240 | return interpret_urb_result(us, pipe, length, result, |
241 | us->current_urb->actual_length); | |
126bb03b AC |
242 | } |
243 | ||
3aa4fc58 CYC |
244 | /* |
245 | * usb_stor_bulk_transfer_sglist() | |
246 | */ | |
126bb03b AC |
247 | static int usb_stor_bulk_transfer_sglist(struct us_data *us, unsigned int pipe, |
248 | struct scatterlist *sg, int num_sg, unsigned int length, | |
249 | unsigned int *act_len) | |
250 | { | |
251 | int result; | |
252 | ||
871f8477 | 253 | /* pr_info("transport --- usb_stor_bulk_transfer_sglist\n"); */ |
126bb03b AC |
254 | if (test_bit(US_FLIDX_ABORTING, &us->dflags)) |
255 | return USB_STOR_XFER_ERROR; | |
256 | ||
257 | /* initialize the scatter-gather request block */ | |
3aa4fc58 CYC |
258 | result = usb_sg_init(&us->current_sg, us->pusb_dev, pipe, 0, |
259 | sg, num_sg, length, GFP_NOIO); | |
260 | if (result) { | |
871f8477 | 261 | /* pr_info("usb_sg_init returned %d\n", result); */ |
126bb03b AC |
262 | return USB_STOR_XFER_ERROR; |
263 | } | |
264 | ||
3aa4fc58 CYC |
265 | /* since the block has been initialized successfully, |
266 | it's now okay to cancel it */ | |
126bb03b AC |
267 | set_bit(US_FLIDX_SG_ACTIVE, &us->dflags); |
268 | ||
269 | /* did an abort/disconnect occur during the submission? */ | |
3aa4fc58 | 270 | if (test_bit(US_FLIDX_ABORTING, &us->dflags)) { |
126bb03b | 271 | /* cancel the request, if it hasn't been cancelled already */ |
3aa4fc58 | 272 | if (test_and_clear_bit(US_FLIDX_SG_ACTIVE, &us->dflags)) { |
871f8477 | 273 | /* pr_info("-- cancelling sg request\n"); */ |
126bb03b AC |
274 | usb_sg_cancel(&us->current_sg); |
275 | } | |
276 | } | |
277 | ||
278 | /* wait for the completion of the transfer */ | |
279 | usb_sg_wait(&us->current_sg); | |
280 | clear_bit(US_FLIDX_SG_ACTIVE, &us->dflags); | |
281 | ||
282 | result = us->current_sg.status; | |
283 | if (act_len) | |
284 | *act_len = us->current_sg.bytes; | |
285 | ||
3aa4fc58 CYC |
286 | return interpret_urb_result(us, pipe, length, |
287 | result, us->current_sg.bytes); | |
126bb03b AC |
288 | } |
289 | ||
3aa4fc58 CYC |
290 | /* |
291 | * usb_stor_bulk_srb() | |
292 | */ | |
293 | int usb_stor_bulk_srb(struct us_data *us, unsigned int pipe, | |
294 | struct scsi_cmnd *srb) | |
126bb03b AC |
295 | { |
296 | unsigned int partial; | |
297 | int result = usb_stor_bulk_transfer_sglist(us, pipe, scsi_sglist(srb), | |
298 | scsi_sg_count(srb), scsi_bufflen(srb), | |
299 | &partial); | |
300 | ||
301 | scsi_set_resid(srb, scsi_bufflen(srb) - partial); | |
302 | return result; | |
303 | } | |
304 | ||
3aa4fc58 CYC |
305 | /* |
306 | * usb_stor_bulk_transfer_sg() | |
307 | */ | |
308 | int usb_stor_bulk_transfer_sg(struct us_data *us, unsigned int pipe, | |
126bb03b AC |
309 | void *buf, unsigned int length_left, int use_sg, int *residual) |
310 | { | |
311 | int result; | |
312 | unsigned int partial; | |
313 | ||
871f8477 | 314 | /* pr_info("transport --- usb_stor_bulk_transfer_sg\n"); */ |
126bb03b | 315 | /* are we scatter-gathering? */ |
3aa4fc58 | 316 | if (use_sg) { |
126bb03b AC |
317 | /* use the usb core scatter-gather primitives */ |
318 | result = usb_stor_bulk_transfer_sglist(us, pipe, | |
319 | (struct scatterlist *) buf, use_sg, | |
320 | length_left, &partial); | |
321 | length_left -= partial; | |
3aa4fc58 | 322 | } else { |
126bb03b | 323 | /* no scatter-gather, just make the request */ |
3aa4fc58 CYC |
324 | result = usb_stor_bulk_transfer_buf(us, pipe, buf, |
325 | length_left, &partial); | |
126bb03b AC |
326 | length_left -= partial; |
327 | } | |
328 | ||
329 | /* store the residual and return the error code */ | |
330 | if (residual) | |
331 | *residual = length_left; | |
332 | return result; | |
333 | } | |
334 | ||
335 | /*********************************************************************** | |
336 | * Transport routines | |
337 | ***********************************************************************/ | |
3aa4fc58 CYC |
338 | /* |
339 | * usb_stor_invoke_transport() | |
340 | */ | |
126bb03b AC |
341 | void usb_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us) |
342 | { | |
343 | int need_auto_sense; | |
344 | int result; | |
345 | ||
871f8477 | 346 | /* pr_info("transport --- usb_stor_invoke_transport\n"); */ |
29b31420 | 347 | usb_stor_print_cmd(us, srb); |
126bb03b AC |
348 | /* send the command to the transport layer */ |
349 | scsi_set_resid(srb, 0); | |
3aa4fc58 CYC |
350 | result = us->transport(srb, us); /* usb_stor_Bulk_transport; */ |
351 | ||
352 | /* if the command gets aborted by the higher layers, | |
353 | we need to short-circuit all other processing */ | |
354 | if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) { | |
871f8477 | 355 | /* pr_info("-- command was aborted\n"); */ |
126bb03b AC |
356 | srb->result = DID_ABORT << 16; |
357 | goto Handle_Errors; | |
358 | } | |
359 | ||
360 | /* if there is a transport error, reset and don't auto-sense */ | |
3aa4fc58 | 361 | if (result == USB_STOR_TRANSPORT_ERROR) { |
871f8477 | 362 | /* pr_info("-- transport indicates error, resetting\n"); */ |
126bb03b AC |
363 | srb->result = DID_ERROR << 16; |
364 | goto Handle_Errors; | |
365 | } | |
366 | ||
367 | /* if the transport provided its own sense data, don't auto-sense */ | |
3aa4fc58 | 368 | if (result == USB_STOR_TRANSPORT_NO_SENSE) { |
126bb03b AC |
369 | srb->result = SAM_STAT_CHECK_CONDITION; |
370 | return; | |
371 | } | |
372 | ||
373 | srb->result = SAM_STAT_GOOD; | |
374 | ||
375 | /* Determine if we need to auto-sense */ | |
376 | need_auto_sense = 0; | |
377 | ||
3aa4fc58 CYC |
378 | if ((us->protocol == USB_PR_CB || us->protocol == USB_PR_DPCM_USB) && |
379 | srb->sc_data_direction != DMA_FROM_DEVICE) { | |
871f8477 | 380 | /* pr_info("-- CB transport device requiring auto-sense\n"); */ |
126bb03b AC |
381 | need_auto_sense = 1; |
382 | } | |
383 | ||
3aa4fc58 | 384 | if (result == USB_STOR_TRANSPORT_FAILED) { |
871f8477 | 385 | /* pr_info("-- transport indicates command failure\n"); */ |
126bb03b AC |
386 | need_auto_sense = 1; |
387 | } | |
388 | ||
389 | /* Now, if we need to do the auto-sense, let's do it */ | |
3aa4fc58 | 390 | if (need_auto_sense) { |
126bb03b AC |
391 | int temp_result; |
392 | struct scsi_eh_save ses; | |
393 | ||
871f8477 | 394 | pr_info("Issuing auto-REQUEST_SENSE\n"); |
126bb03b AC |
395 | |
396 | scsi_eh_prep_cmnd(srb, &ses, NULL, 0, US_SENSE_SIZE); | |
397 | ||
398 | /* we must do the protocol translation here */ | |
3aa4fc58 CYC |
399 | if (us->subclass == USB_SC_RBC || |
400 | us->subclass == USB_SC_SCSI || | |
401 | us->subclass == USB_SC_CYP_ATACB) { | |
126bb03b | 402 | srb->cmd_len = 6; |
3aa4fc58 | 403 | } else { |
126bb03b | 404 | srb->cmd_len = 12; |
3aa4fc58 | 405 | } |
126bb03b AC |
406 | /* issue the auto-sense command */ |
407 | scsi_set_resid(srb, 0); | |
408 | temp_result = us->transport(us->srb, us); | |
409 | ||
410 | /* let's clean up right away */ | |
411 | scsi_eh_restore_cmnd(srb, &ses); | |
412 | ||
3aa4fc58 | 413 | if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) { |
871f8477 | 414 | /* pr_info("-- auto-sense aborted\n"); */ |
126bb03b AC |
415 | srb->result = DID_ABORT << 16; |
416 | goto Handle_Errors; | |
417 | } | |
3aa4fc58 | 418 | if (temp_result != USB_STOR_TRANSPORT_GOOD) { |
871f8477 | 419 | /* pr_info("-- auto-sense failure\n"); */ |
126bb03b AC |
420 | srb->result = DID_ERROR << 16; |
421 | if (!(us->fflags & US_FL_SCM_MULT_TARG)) | |
422 | goto Handle_Errors; | |
423 | return; | |
424 | } | |
425 | ||
426 | /* set the result so the higher layers expect this data */ | |
427 | srb->result = SAM_STAT_CHECK_CONDITION; | |
428 | ||
429 | if (result == USB_STOR_TRANSPORT_GOOD && | |
430 | (srb->sense_buffer[2] & 0xaf) == 0 && | |
431 | srb->sense_buffer[12] == 0 && | |
3aa4fc58 | 432 | srb->sense_buffer[13] == 0) { |
126bb03b AC |
433 | srb->result = SAM_STAT_GOOD; |
434 | srb->sense_buffer[0] = 0x0; | |
435 | } | |
436 | } | |
437 | ||
438 | /* Did we transfer less than the minimum amount required? */ | |
3aa4fc58 CYC |
439 | if (srb->result == SAM_STAT_GOOD && scsi_bufflen(srb) - |
440 | scsi_get_resid(srb) < srb->underflow) | |
441 | srb->result = (DID_ERROR << 16); | |
442 | /* v02 | (SUGGEST_RETRY << 24); */ | |
126bb03b AC |
443 | |
444 | return; | |
445 | ||
446 | Handle_Errors: | |
447 | scsi_lock(us_to_host(us)); | |
448 | set_bit(US_FLIDX_RESETTING, &us->dflags); | |
449 | clear_bit(US_FLIDX_ABORTING, &us->dflags); | |
450 | scsi_unlock(us_to_host(us)); | |
451 | ||
452 | mutex_unlock(&us->dev_mutex); | |
453 | result = usb_stor_port_reset(us); | |
454 | mutex_lock(&us->dev_mutex); | |
455 | ||
3aa4fc58 | 456 | if (result < 0) { |
126bb03b AC |
457 | scsi_lock(us_to_host(us)); |
458 | usb_stor_report_device_reset(us); | |
459 | scsi_unlock(us_to_host(us)); | |
460 | us->transport_reset(us); | |
461 | } | |
462 | clear_bit(US_FLIDX_RESETTING, &us->dflags); | |
463 | } | |
464 | ||
3aa4fc58 CYC |
465 | /* |
466 | * ENE_stor_invoke_transport() | |
467 | */ | |
126bb03b AC |
468 | void ENE_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us) |
469 | { | |
3aa4fc58 | 470 | int result = 0; |
126bb03b | 471 | |
871f8477 | 472 | /* pr_info("transport --- ENE_stor_invoke_transport\n"); */ |
29b31420 | 473 | usb_stor_print_cmd(us, srb); |
126bb03b AC |
474 | /* send the command to the transport layer */ |
475 | scsi_set_resid(srb, 0); | |
20c3d7f7 | 476 | if (!(us->SM_Status.Ready)) |
126bb03b | 477 | result = ENE_InitMedia(us); |
3aa4fc58 | 478 | |
126bb03b AC |
479 | if (us->Power_IsResum == true) { |
480 | result = ENE_InitMedia(us); | |
3aa4fc58 CYC |
481 | us->Power_IsResum = false; |
482 | } | |
483 | ||
3aa4fc58 CYC |
484 | if (us->SM_Status.Ready) |
485 | result = SM_SCSIIrp(us, srb); | |
486 | ||
487 | /* if the command gets aborted by the higher layers, | |
488 | we need to short-circuit all other processing */ | |
489 | if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) { | |
871f8477 | 490 | /* pr_info("-- command was aborted\n"); */ |
126bb03b AC |
491 | srb->result = DID_ABORT << 16; |
492 | goto Handle_Errors; | |
493 | } | |
494 | ||
495 | /* if there is a transport error, reset and don't auto-sense */ | |
3aa4fc58 | 496 | if (result == USB_STOR_TRANSPORT_ERROR) { |
871f8477 | 497 | /* pr_info("-- transport indicates error, resetting\n"); */ |
126bb03b AC |
498 | srb->result = DID_ERROR << 16; |
499 | goto Handle_Errors; | |
500 | } | |
501 | ||
502 | /* if the transport provided its own sense data, don't auto-sense */ | |
3aa4fc58 | 503 | if (result == USB_STOR_TRANSPORT_NO_SENSE) { |
126bb03b AC |
504 | srb->result = SAM_STAT_CHECK_CONDITION; |
505 | return; | |
506 | } | |
507 | ||
508 | srb->result = SAM_STAT_GOOD; | |
3aa4fc58 | 509 | if (result == USB_STOR_TRANSPORT_FAILED) { |
871f8477 | 510 | /* pr_info("-- transport indicates command failure\n"); */ |
3aa4fc58 | 511 | /* need_auto_sense = 1; */ |
126bb03b AC |
512 | BuildSenseBuffer(srb, us->SrbStatus); |
513 | srb->result = SAM_STAT_CHECK_CONDITION; | |
514 | } | |
515 | ||
516 | /* Did we transfer less than the minimum amount required? */ | |
3aa4fc58 CYC |
517 | if (srb->result == SAM_STAT_GOOD && scsi_bufflen(srb) - |
518 | scsi_get_resid(srb) < srb->underflow) | |
519 | srb->result = (DID_ERROR << 16); | |
520 | /* v02 | (SUGGEST_RETRY << 24); */ | |
126bb03b AC |
521 | |
522 | return; | |
523 | ||
524 | Handle_Errors: | |
525 | scsi_lock(us_to_host(us)); | |
526 | set_bit(US_FLIDX_RESETTING, &us->dflags); | |
527 | clear_bit(US_FLIDX_ABORTING, &us->dflags); | |
528 | scsi_unlock(us_to_host(us)); | |
529 | ||
530 | mutex_unlock(&us->dev_mutex); | |
531 | result = usb_stor_port_reset(us); | |
532 | mutex_lock(&us->dev_mutex); | |
533 | ||
3aa4fc58 | 534 | if (result < 0) { |
126bb03b AC |
535 | scsi_lock(us_to_host(us)); |
536 | usb_stor_report_device_reset(us); | |
537 | scsi_unlock(us_to_host(us)); | |
538 | us->transport_reset(us); | |
539 | } | |
540 | clear_bit(US_FLIDX_RESETTING, &us->dflags); | |
541 | } | |
542 | ||
3aa4fc58 CYC |
543 | /* |
544 | * BuildSenseBuffer() | |
545 | */ | |
126bb03b AC |
546 | void BuildSenseBuffer(struct scsi_cmnd *srb, int SrbStatus) |
547 | { | |
3aa4fc58 CYC |
548 | BYTE *buf = srb->sense_buffer; |
549 | BYTE asc; | |
126bb03b | 550 | |
871f8477 | 551 | pr_info("transport --- BuildSenseBuffer\n"); |
3aa4fc58 CYC |
552 | switch (SrbStatus) { |
553 | case SS_NOT_READY: | |
554 | asc = 0x3a; | |
555 | break; /* sense key = 0x02 */ | |
556 | case SS_MEDIUM_ERR: | |
557 | asc = 0x0c; | |
558 | break; /* sense key = 0x03 */ | |
559 | case SS_ILLEGAL_REQUEST: | |
560 | asc = 0x20; | |
561 | break; /* sense key = 0x05 */ | |
562 | default: | |
563 | asc = 0x00; | |
564 | break; /* ?? */ | |
565 | } | |
566 | ||
567 | memset(buf, 0, 18); | |
568 | buf[0x00] = 0xf0; | |
569 | buf[0x02] = SrbStatus; | |
570 | buf[0x07] = 0x0b; | |
571 | buf[0x0c] = asc; | |
126bb03b AC |
572 | } |
573 | ||
3aa4fc58 CYC |
574 | /* |
575 | * usb_stor_stop_transport() | |
576 | */ | |
126bb03b AC |
577 | void usb_stor_stop_transport(struct us_data *us) |
578 | { | |
871f8477 | 579 | /* pr_info("transport --- usb_stor_stop_transport\n"); */ |
126bb03b | 580 | |
3aa4fc58 | 581 | if (test_and_clear_bit(US_FLIDX_URB_ACTIVE, &us->dflags)) { |
871f8477 | 582 | /* pr_info("-- cancelling URB\n"); */ |
126bb03b AC |
583 | usb_unlink_urb(us->current_urb); |
584 | } | |
585 | ||
3aa4fc58 | 586 | if (test_and_clear_bit(US_FLIDX_SG_ACTIVE, &us->dflags)) { |
871f8477 | 587 | /* pr_info("-- cancelling sg request\n"); */ |
126bb03b AC |
588 | usb_sg_cancel(&us->current_sg); |
589 | } | |
590 | } | |
591 | ||
3aa4fc58 CYC |
592 | /* |
593 | * usb_stor_Bulk_max_lun() | |
594 | */ | |
126bb03b AC |
595 | int usb_stor_Bulk_max_lun(struct us_data *us) |
596 | { | |
597 | int result; | |
598 | ||
871f8477 | 599 | /* pr_info("transport --- usb_stor_Bulk_max_lun\n"); */ |
126bb03b AC |
600 | /* issue the command */ |
601 | us->iobuf[0] = 0; | |
602 | result = usb_stor_control_msg(us, us->recv_ctrl_pipe, | |
603 | US_BULK_GET_MAX_LUN, | |
604 | USB_DIR_IN | USB_TYPE_CLASS | | |
605 | USB_RECIP_INTERFACE, | |
606 | 0, us->ifnum, us->iobuf, 1, HZ); | |
607 | ||
871f8477 CYC |
608 | /* pr_info("GetMaxLUN command result is %d, data is %d\n", |
609 | result, us->iobuf[0]); */ | |
126bb03b AC |
610 | |
611 | /* if we have a successful request, return the result */ | |
612 | if (result > 0) | |
613 | return us->iobuf[0]; | |
614 | ||
615 | return 0; | |
616 | } | |
617 | ||
3aa4fc58 CYC |
618 | /* |
619 | * usb_stor_Bulk_transport() | |
620 | */ | |
126bb03b AC |
621 | int usb_stor_Bulk_transport(struct scsi_cmnd *srb, struct us_data *us) |
622 | { | |
623 | struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap *) us->iobuf; | |
624 | struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap *) us->iobuf; | |
625 | unsigned int transfer_length = scsi_bufflen(srb); | |
626 | unsigned int residue; | |
627 | int result; | |
628 | int fake_sense = 0; | |
629 | unsigned int cswlen; | |
630 | unsigned int cbwlen = US_BULK_CB_WRAP_LEN; | |
631 | ||
871f8477 | 632 | /* pr_info("transport --- usb_stor_Bulk_transport\n"); */ |
126bb03b | 633 | /* Take care of BULK32 devices; set extra byte to 0 */ |
3aa4fc58 | 634 | if (unlikely(us->fflags & US_FL_BULK32)) { |
126bb03b AC |
635 | cbwlen = 32; |
636 | us->iobuf[31] = 0; | |
637 | } | |
638 | ||
639 | /* set up the command wrapper */ | |
640 | bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN); | |
641 | bcb->DataTransferLength = cpu_to_le32(transfer_length); | |
642 | bcb->Flags = srb->sc_data_direction == DMA_FROM_DEVICE ? 1 << 7 : 0; | |
643 | bcb->Tag = ++us->tag; | |
644 | bcb->Lun = srb->device->lun; | |
645 | if (us->fflags & US_FL_SCM_MULT_TARG) | |
646 | bcb->Lun |= srb->device->id << 4; | |
647 | bcb->Length = srb->cmd_len; | |
648 | ||
649 | /* copy the command payload */ | |
650 | memset(bcb->CDB, 0, sizeof(bcb->CDB)); | |
651 | memcpy(bcb->CDB, srb->cmnd, bcb->Length); | |
652 | ||
3aa4fc58 | 653 | /* send command */ |
126bb03b | 654 | /* send it to out endpoint */ |
871f8477 | 655 | /* pr_info("Bulk Command S 0x%x T 0x%x L %d F %d Trg %d LUN %d CL %d\n", |
126bb03b AC |
656 | le32_to_cpu(bcb->Signature), bcb->Tag, |
657 | le32_to_cpu(bcb->DataTransferLength), bcb->Flags, | |
658 | (bcb->Lun >> 4), (bcb->Lun & 0x0F), | |
871f8477 | 659 | bcb->Length); */ |
3aa4fc58 CYC |
660 | result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, |
661 | bcb, cbwlen, NULL); | |
871f8477 | 662 | /* pr_info("Bulk command transfer result=%d\n", result); */ |
126bb03b AC |
663 | if (result != USB_STOR_XFER_GOOD) |
664 | return USB_STOR_TRANSPORT_ERROR; | |
665 | ||
666 | if (unlikely(us->fflags & US_FL_GO_SLOW)) | |
667 | udelay(125); | |
668 | ||
3aa4fc58 CYC |
669 | /* R/W data */ |
670 | if (transfer_length) { | |
d48e5cff CYC |
671 | unsigned int pipe; |
672 | if (srb->sc_data_direction == DMA_FROM_DEVICE) | |
673 | pipe = us->recv_bulk_pipe; | |
674 | else | |
675 | pipe = us->send_bulk_pipe; | |
676 | ||
126bb03b | 677 | result = usb_stor_bulk_srb(us, pipe, srb); |
871f8477 | 678 | /* pr_info("Bulk data transfer result 0x%x\n", result); */ |
126bb03b AC |
679 | if (result == USB_STOR_XFER_ERROR) |
680 | return USB_STOR_TRANSPORT_ERROR; | |
681 | ||
682 | if (result == USB_STOR_XFER_LONG) | |
683 | fake_sense = 1; | |
684 | } | |
685 | ||
686 | /* get CSW for device status */ | |
871f8477 | 687 | /* pr_info("Attempting to get CSW...\n"); */ |
3aa4fc58 CYC |
688 | result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs, |
689 | US_BULK_CS_WRAP_LEN, &cswlen); | |
126bb03b | 690 | |
3aa4fc58 | 691 | if (result == USB_STOR_XFER_SHORT && cswlen == 0) { |
871f8477 | 692 | /* pr_info("Received 0-length CSW; retrying...\n"); */ |
3aa4fc58 CYC |
693 | result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs, |
694 | US_BULK_CS_WRAP_LEN, &cswlen); | |
126bb03b AC |
695 | } |
696 | ||
697 | /* did the attempt to read the CSW fail? */ | |
3aa4fc58 | 698 | if (result == USB_STOR_XFER_STALLED) { |
126bb03b | 699 | /* get the status again */ |
871f8477 | 700 | /* pr_info("Attempting to get CSW (2nd try)...\n"); */ |
3aa4fc58 CYC |
701 | result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs, |
702 | US_BULK_CS_WRAP_LEN, NULL); | |
126bb03b AC |
703 | } |
704 | ||
705 | /* if we still have a failure at this point, we're in trouble */ | |
871f8477 | 706 | /* pr_info("Bulk status result = %d\n", result); */ |
126bb03b AC |
707 | if (result != USB_STOR_XFER_GOOD) |
708 | return USB_STOR_TRANSPORT_ERROR; | |
709 | ||
710 | /* check bulk status */ | |
711 | residue = le32_to_cpu(bcs->Residue); | |
871f8477 CYC |
712 | /* pr_info("Bulk Status S 0x%x T 0x%x R %u Stat 0x%x\n", |
713 | le32_to_cpu(bcs->Signature), | |
714 | bcs->Tag, residue, bcs->Status); */ | |
3aa4fc58 CYC |
715 | if (!(bcs->Tag == us->tag || |
716 | (us->fflags & US_FL_BULK_IGNORE_TAG)) || | |
717 | bcs->Status > US_BULK_STAT_PHASE) { | |
871f8477 | 718 | /* pr_info("Bulk logical error\n"); */ |
126bb03b AC |
719 | return USB_STOR_TRANSPORT_ERROR; |
720 | } | |
721 | ||
3aa4fc58 | 722 | if (!us->bcs_signature) { |
126bb03b | 723 | us->bcs_signature = bcs->Signature; |
3aa4fc58 | 724 | /* if (us->bcs_signature != cpu_to_le32(US_BULK_CS_SIGN)) */ |
871f8477 CYC |
725 | /* pr_info("Learnt BCS signature 0x%08X\n", |
726 | le32_to_cpu(us->bcs_signature)); */ | |
3aa4fc58 | 727 | } else if (bcs->Signature != us->bcs_signature) { |
871f8477 | 728 | /* pr_info("Signature mismatch: got %08X, expecting %08X\n", |
126bb03b | 729 | le32_to_cpu(bcs->Signature), |
871f8477 | 730 | le32_to_cpu(us->bcs_signature)); */ |
126bb03b AC |
731 | return USB_STOR_TRANSPORT_ERROR; |
732 | } | |
733 | ||
734 | /* try to compute the actual residue, based on how much data | |
735 | * was really transferred and what the device tells us */ | |
3aa4fc58 | 736 | if (residue && !(us->fflags & US_FL_IGNORE_RESIDUE)) { |
126bb03b AC |
737 | |
738 | /* Heuristically detect devices that generate bogus residues | |
739 | * by seeing what happens with INQUIRY and READ CAPACITY | |
740 | * commands. | |
741 | */ | |
742 | if (bcs->Status == US_BULK_STAT_OK && | |
743 | scsi_get_resid(srb) == 0 && | |
744 | ((srb->cmnd[0] == INQUIRY && | |
745 | transfer_length == 36) || | |
746 | (srb->cmnd[0] == READ_CAPACITY && | |
3aa4fc58 | 747 | transfer_length == 8))) { |
126bb03b AC |
748 | us->fflags |= US_FL_IGNORE_RESIDUE; |
749 | ||
3aa4fc58 | 750 | } else { |
126bb03b | 751 | residue = min(residue, transfer_length); |
3fb91d11 JS |
752 | scsi_set_resid(srb, max_t(int, scsi_get_resid(srb), |
753 | residue)); | |
126bb03b AC |
754 | } |
755 | } | |
756 | ||
757 | /* based on the status code, we report good or bad */ | |
3aa4fc58 CYC |
758 | switch (bcs->Status) { |
759 | case US_BULK_STAT_OK: | |
760 | if (fake_sense) { | |
761 | memcpy(srb->sense_buffer, usb_stor_sense_invalidCDB, | |
762 | sizeof(usb_stor_sense_invalidCDB)); | |
763 | return USB_STOR_TRANSPORT_NO_SENSE; | |
764 | } | |
765 | return USB_STOR_TRANSPORT_GOOD; | |
766 | ||
767 | case US_BULK_STAT_FAIL: | |
768 | return USB_STOR_TRANSPORT_FAILED; | |
769 | ||
770 | case US_BULK_STAT_PHASE: | |
771 | return USB_STOR_TRANSPORT_ERROR; | |
126bb03b AC |
772 | } |
773 | return USB_STOR_TRANSPORT_ERROR; | |
774 | } | |
775 | ||
776 | /*********************************************************************** | |
777 | * Reset routines | |
778 | ***********************************************************************/ | |
3aa4fc58 CYC |
779 | /* |
780 | * usb_stor_reset_common() | |
781 | */ | |
126bb03b AC |
782 | static int usb_stor_reset_common(struct us_data *us, |
783 | u8 request, u8 requesttype, | |
784 | u16 value, u16 index, void *data, u16 size) | |
785 | { | |
786 | int result; | |
787 | int result2; | |
788 | ||
871f8477 | 789 | /* pr_info("transport --- usb_stor_reset_common\n"); */ |
3aa4fc58 | 790 | if (test_bit(US_FLIDX_DISCONNECTING, &us->dflags)) { |
871f8477 | 791 | /* pr_info("No reset during disconnect\n"); */ |
126bb03b AC |
792 | return -EIO; |
793 | } | |
794 | ||
3aa4fc58 CYC |
795 | result = usb_stor_control_msg(us, us->send_ctrl_pipe, |
796 | request, requesttype, value, index, data, size, 5*HZ); | |
797 | ||
798 | if (result < 0) { | |
871f8477 | 799 | /* pr_info("Soft reset failed: %d\n", result); */ |
126bb03b AC |
800 | return result; |
801 | } | |
802 | ||
3aa4fc58 CYC |
803 | wait_event_interruptible_timeout(us->delay_wait, |
804 | test_bit(US_FLIDX_DISCONNECTING, &us->dflags), HZ*6); | |
805 | ||
806 | if (test_bit(US_FLIDX_DISCONNECTING, &us->dflags)) { | |
871f8477 | 807 | /* pr_info("Reset interrupted by disconnect\n"); */ |
126bb03b AC |
808 | return -EIO; |
809 | } | |
810 | ||
871f8477 | 811 | /* pr_info("Soft reset: clearing bulk-in endpoint halt\n"); */ |
126bb03b AC |
812 | result = usb_stor_clear_halt(us, us->recv_bulk_pipe); |
813 | ||
871f8477 | 814 | /* pr_info("Soft reset: clearing bulk-out endpoint halt\n"); */ |
126bb03b AC |
815 | result2 = usb_stor_clear_halt(us, us->send_bulk_pipe); |
816 | ||
817 | /* return a result code based on the result of the clear-halts */ | |
818 | if (result >= 0) | |
819 | result = result2; | |
3aa4fc58 | 820 | /* if (result < 0) */ |
871f8477 | 821 | /* pr_info("Soft reset failed\n"); */ |
3aa4fc58 | 822 | /* else */ |
871f8477 | 823 | /* pr_info("Soft reset done\n"); */ |
126bb03b AC |
824 | return result; |
825 | } | |
826 | ||
3aa4fc58 CYC |
827 | /* |
828 | * usb_stor_Bulk_reset() | |
829 | */ | |
126bb03b AC |
830 | int usb_stor_Bulk_reset(struct us_data *us) |
831 | { | |
871f8477 | 832 | /* pr_info("transport --- usb_stor_Bulk_reset\n"); */ |
126bb03b AC |
833 | return usb_stor_reset_common(us, US_BULK_RESET_REQUEST, |
834 | USB_TYPE_CLASS | USB_RECIP_INTERFACE, | |
835 | 0, us->ifnum, NULL, 0); | |
836 | } | |
837 | ||
3aa4fc58 CYC |
838 | /* |
839 | * usb_stor_port_reset() | |
840 | */ | |
126bb03b AC |
841 | int usb_stor_port_reset(struct us_data *us) |
842 | { | |
a200adb1 | 843 | int result; |
126bb03b | 844 | |
871f8477 | 845 | /* pr_info("transport --- usb_stor_port_reset\n"); */ |
e1049604 | 846 | result = usb_lock_device_for_reset(us->pusb_dev, us->pusb_intf); |
126bb03b | 847 | if (result < 0) |
871f8477 | 848 | pr_info("unable to lock device for reset: %d\n", result); |
e1049604 | 849 | else { |
126bb03b | 850 | /* Were we disconnected while waiting for the lock? */ |
e1049604 | 851 | if (test_bit(US_FLIDX_DISCONNECTING, &us->dflags)) { |
126bb03b | 852 | result = -EIO; |
871f8477 | 853 | /* pr_info("No reset during disconnect\n"); */ |
e1049604 | 854 | } else { |
126bb03b | 855 | result = usb_reset_device(us->pusb_dev); |
871f8477 CYC |
856 | /* pr_info("usb_reset_composite_device returns %d\n", |
857 | result); */ | |
126bb03b | 858 | } |
e1049604 | 859 | usb_unlock_device(us->pusb_dev); |
126bb03b AC |
860 | } |
861 | return result; | |
862 | } | |
863 | ||
864 |