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33#ifdef CONFIG_USB_STORAGE_DEBUG
34#define DEBUG
35#endif
36
37#include <linux/sched.h>
38#include <linux/errno.h>
39#include <linux/module.h>
40#include <linux/slab.h>
41#include <linux/kthread.h>
42#include <linux/mutex.h>
43#include <linux/utsname.h>
44
45#include <scsi/scsi.h>
46#include <scsi/scsi_cmnd.h>
47#include <scsi/scsi_device.h>
48
49#include "usb.h"
50#include "scsiglue.h"
51#include "transport.h"
52#include "protocol.h"
53#include "debug.h"
54#include "initializers.h"
55
56#include "sierra_ms.h"
57#include "option_ms.h"
58
59#if IS_ENABLED(CONFIG_USB_UAS)
60#include "uas-detect.h"
61#endif
62
63#define DRV_NAME "usb-storage"
64
65
66MODULE_AUTHOR("Matthew Dharm <mdharm-usb@one-eyed-alien.net>");
67MODULE_DESCRIPTION("USB Mass Storage driver for Linux");
68MODULE_LICENSE("GPL");
69
70static unsigned int delay_use = 1;
71module_param(delay_use, uint, S_IRUGO | S_IWUSR);
72MODULE_PARM_DESC(delay_use, "seconds to delay before using a new device");
73
74static char quirks[128];
75module_param_string(quirks, quirks, sizeof(quirks), S_IRUGO | S_IWUSR);
76MODULE_PARM_DESC(quirks, "supplemental list of device IDs and their quirks");
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94#define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
95 vendor_name, product_name, use_protocol, use_transport, \
96 init_function, Flags) \
97{ \
98 .vendorName = vendor_name, \
99 .productName = product_name, \
100 .useProtocol = use_protocol, \
101 .useTransport = use_transport, \
102 .initFunction = init_function, \
103}
104
105#define COMPLIANT_DEV UNUSUAL_DEV
106
107#define USUAL_DEV(use_protocol, use_transport) \
108{ \
109 .useProtocol = use_protocol, \
110 .useTransport = use_transport, \
111}
112
113#define UNUSUAL_VENDOR_INTF(idVendor, cl, sc, pr, \
114 vendor_name, product_name, use_protocol, use_transport, \
115 init_function, Flags) \
116{ \
117 .vendorName = vendor_name, \
118 .productName = product_name, \
119 .useProtocol = use_protocol, \
120 .useTransport = use_transport, \
121 .initFunction = init_function, \
122}
123
124static const struct us_unusual_dev us_unusual_dev_list[] = {
125# include "unusual_devs.h"
126 { }
127};
128
129static const struct us_unusual_dev for_dynamic_ids =
130 USUAL_DEV(USB_SC_SCSI, USB_PR_BULK);
131
132#undef UNUSUAL_DEV
133#undef COMPLIANT_DEV
134#undef USUAL_DEV
135#undef UNUSUAL_VENDOR_INTF
136
137#ifdef CONFIG_LOCKDEP
138
139static struct lock_class_key us_interface_key[USB_MAXINTERFACES];
140
141static void us_set_lock_class(struct mutex *mutex,
142 struct usb_interface *intf)
143{
144 struct usb_device *udev = interface_to_usbdev(intf);
145 struct usb_host_config *config = udev->actconfig;
146 int i;
147
148 for (i = 0; i < config->desc.bNumInterfaces; i++) {
149 if (config->interface[i] == intf)
150 break;
151 }
152
153 BUG_ON(i == config->desc.bNumInterfaces);
154
155 lockdep_set_class(mutex, &us_interface_key[i]);
156}
157
158#else
159
160static void us_set_lock_class(struct mutex *mutex,
161 struct usb_interface *intf)
162{
163}
164
165#endif
166
167#ifdef CONFIG_PM
168
169int usb_stor_suspend(struct usb_interface *iface, pm_message_t message)
170{
171 struct us_data *us = usb_get_intfdata(iface);
172
173
174 mutex_lock(&us->dev_mutex);
175
176 if (us->suspend_resume_hook)
177 (us->suspend_resume_hook)(us, US_SUSPEND);
178
179
180
181
182
183
184 mutex_unlock(&us->dev_mutex);
185 return 0;
186}
187EXPORT_SYMBOL_GPL(usb_stor_suspend);
188
189int usb_stor_resume(struct usb_interface *iface)
190{
191 struct us_data *us = usb_get_intfdata(iface);
192
193 mutex_lock(&us->dev_mutex);
194
195 if (us->suspend_resume_hook)
196 (us->suspend_resume_hook)(us, US_RESUME);
197
198 mutex_unlock(&us->dev_mutex);
199 return 0;
200}
201EXPORT_SYMBOL_GPL(usb_stor_resume);
202
203int usb_stor_reset_resume(struct usb_interface *iface)
204{
205 struct us_data *us = usb_get_intfdata(iface);
206
207
208 usb_stor_report_bus_reset(us);
209
210
211
212
213
214 return 0;
215}
216EXPORT_SYMBOL_GPL(usb_stor_reset_resume);
217
218#endif
219
220
221
222
223
224
225int usb_stor_pre_reset(struct usb_interface *iface)
226{
227 struct us_data *us = usb_get_intfdata(iface);
228
229
230 mutex_lock(&us->dev_mutex);
231 return 0;
232}
233EXPORT_SYMBOL_GPL(usb_stor_pre_reset);
234
235int usb_stor_post_reset(struct usb_interface *iface)
236{
237 struct us_data *us = usb_get_intfdata(iface);
238
239
240 usb_stor_report_bus_reset(us);
241
242
243
244
245
246
247 mutex_unlock(&us->dev_mutex);
248 return 0;
249}
250EXPORT_SYMBOL_GPL(usb_stor_post_reset);
251
252
253
254
255
256
257
258
259
260
261void fill_inquiry_response(struct us_data *us, unsigned char *data,
262 unsigned int data_len)
263{
264 if (data_len < 36)
265 return;
266
267 memset(data+8, ' ', 28);
268 if (data[0]&0x20) {
269
270
271
272
273
274
275
276
277
278
279 } else {
280 u16 bcdDevice = le16_to_cpu(us->pusb_dev->descriptor.bcdDevice);
281 int n;
282
283 n = strlen(us->unusual_dev->vendorName);
284 memcpy(data+8, us->unusual_dev->vendorName, min(8, n));
285 n = strlen(us->unusual_dev->productName);
286 memcpy(data+16, us->unusual_dev->productName, min(16, n));
287
288 data[32] = 0x30 + ((bcdDevice>>12) & 0x0F);
289 data[33] = 0x30 + ((bcdDevice>>8) & 0x0F);
290 data[34] = 0x30 + ((bcdDevice>>4) & 0x0F);
291 data[35] = 0x30 + ((bcdDevice) & 0x0F);
292 }
293
294 usb_stor_set_xfer_buf(data, data_len, us->srb);
295}
296EXPORT_SYMBOL_GPL(fill_inquiry_response);
297
298static int usb_stor_control_thread(void * __us)
299{
300 struct us_data *us = (struct us_data *)__us;
301 struct Scsi_Host *host = us_to_host(us);
302 struct scsi_cmnd *srb;
303
304 for (;;) {
305 usb_stor_dbg(us, "*** thread sleeping\n");
306 if (wait_for_completion_interruptible(&us->cmnd_ready))
307 break;
308
309 usb_stor_dbg(us, "*** thread awakened\n");
310
311
312 mutex_lock(&(us->dev_mutex));
313
314
315 scsi_lock(host);
316
317
318 srb = us->srb;
319 if (srb == NULL) {
320 scsi_unlock(host);
321 mutex_unlock(&us->dev_mutex);
322 usb_stor_dbg(us, "-- exiting\n");
323 break;
324 }
325
326
327 if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
328 srb->result = DID_ABORT << 16;
329 goto SkipForAbort;
330 }
331
332 scsi_unlock(host);
333
334
335
336
337
338 if (srb->sc_data_direction == DMA_BIDIRECTIONAL) {
339 usb_stor_dbg(us, "UNKNOWN data direction\n");
340 srb->result = DID_ERROR << 16;
341 }
342
343
344
345
346
347 else if (srb->device->id &&
348 !(us->fflags & US_FL_SCM_MULT_TARG)) {
349 usb_stor_dbg(us, "Bad target number (%d:%llu)\n",
350 srb->device->id,
351 srb->device->lun);
352 srb->result = DID_BAD_TARGET << 16;
353 }
354
355 else if (srb->device->lun > us->max_lun) {
356 usb_stor_dbg(us, "Bad LUN (%d:%llu)\n",
357 srb->device->id,
358 srb->device->lun);
359 srb->result = DID_BAD_TARGET << 16;
360 }
361
362
363
364
365
366 else if ((srb->cmnd[0] == INQUIRY) &&
367 (us->fflags & US_FL_FIX_INQUIRY)) {
368 unsigned char data_ptr[36] = {
369 0x00, 0x80, 0x02, 0x02,
370 0x1F, 0x00, 0x00, 0x00};
371
372 usb_stor_dbg(us, "Faking INQUIRY command\n");
373 fill_inquiry_response(us, data_ptr, 36);
374 srb->result = SAM_STAT_GOOD;
375 }
376
377
378 else {
379 US_DEBUG(usb_stor_show_command(us, srb));
380 us->proto_handler(srb, us);
381 usb_mark_last_busy(us->pusb_dev);
382 }
383
384
385 scsi_lock(host);
386
387
388 if (srb->result == DID_ABORT << 16) {
389SkipForAbort:
390 usb_stor_dbg(us, "scsi command aborted\n");
391 srb = NULL;
392 }
393
394
395
396
397
398
399
400
401 if (test_bit(US_FLIDX_TIMED_OUT, &us->dflags)) {
402 complete(&(us->notify));
403
404
405 clear_bit(US_FLIDX_ABORTING, &us->dflags);
406 clear_bit(US_FLIDX_TIMED_OUT, &us->dflags);
407 }
408
409
410 us->srb = NULL;
411 scsi_unlock(host);
412
413
414 mutex_unlock(&us->dev_mutex);
415
416
417 if (srb) {
418 usb_stor_dbg(us, "scsi cmd done, result=0x%x\n",
419 srb->result);
420 srb->scsi_done(srb);
421 }
422 }
423
424
425 for (;;) {
426 set_current_state(TASK_INTERRUPTIBLE);
427 if (kthread_should_stop())
428 break;
429 schedule();
430 }
431 __set_current_state(TASK_RUNNING);
432 return 0;
433}
434
435
436
437
438
439
440static int associate_dev(struct us_data *us, struct usb_interface *intf)
441{
442
443 us->pusb_dev = interface_to_usbdev(intf);
444 us->pusb_intf = intf;
445 us->ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
446 usb_stor_dbg(us, "Vendor: 0x%04x, Product: 0x%04x, Revision: 0x%04x\n",
447 le16_to_cpu(us->pusb_dev->descriptor.idVendor),
448 le16_to_cpu(us->pusb_dev->descriptor.idProduct),
449 le16_to_cpu(us->pusb_dev->descriptor.bcdDevice));
450 usb_stor_dbg(us, "Interface Subclass: 0x%02x, Protocol: 0x%02x\n",
451 intf->cur_altsetting->desc.bInterfaceSubClass,
452 intf->cur_altsetting->desc.bInterfaceProtocol);
453
454
455 usb_set_intfdata(intf, us);
456
457
458 us->cr = kmalloc(sizeof(*us->cr), GFP_KERNEL);
459 if (!us->cr)
460 return -ENOMEM;
461
462 us->iobuf = usb_alloc_coherent(us->pusb_dev, US_IOBUF_SIZE,
463 GFP_KERNEL, &us->iobuf_dma);
464 if (!us->iobuf) {
465 usb_stor_dbg(us, "I/O buffer allocation failed\n");
466 return -ENOMEM;
467 }
468 return 0;
469}
470
471
472#define TOLOWER(x) ((x) | 0x20)
473
474
475void usb_stor_adjust_quirks(struct usb_device *udev, unsigned long *fflags)
476{
477 char *p;
478 u16 vid = le16_to_cpu(udev->descriptor.idVendor);
479 u16 pid = le16_to_cpu(udev->descriptor.idProduct);
480 unsigned f = 0;
481 unsigned int mask = (US_FL_SANE_SENSE | US_FL_BAD_SENSE |
482 US_FL_FIX_CAPACITY | US_FL_IGNORE_UAS |
483 US_FL_CAPACITY_HEURISTICS | US_FL_IGNORE_DEVICE |
484 US_FL_NOT_LOCKABLE | US_FL_MAX_SECTORS_64 |
485 US_FL_CAPACITY_OK | US_FL_IGNORE_RESIDUE |
486 US_FL_SINGLE_LUN | US_FL_NO_WP_DETECT |
487 US_FL_NO_READ_DISC_INFO | US_FL_NO_READ_CAPACITY_16 |
488 US_FL_INITIAL_READ10 | US_FL_WRITE_CACHE |
489 US_FL_NO_ATA_1X | US_FL_NO_REPORT_OPCODES |
490 US_FL_MAX_SECTORS_240 | US_FL_NO_REPORT_LUNS |
491 US_FL_ALWAYS_SYNC);
492
493 p = quirks;
494 while (*p) {
495
496 if (vid == simple_strtoul(p, &p, 16) &&
497 *p == ':' &&
498 pid == simple_strtoul(p+1, &p, 16) &&
499 *p == ':')
500 break;
501
502
503 while (*p) {
504 if (*p++ == ',')
505 break;
506 }
507 }
508 if (!*p)
509 return;
510
511
512 while (*++p && *p != ',') {
513 switch (TOLOWER(*p)) {
514 case 'a':
515 f |= US_FL_SANE_SENSE;
516 break;
517 case 'b':
518 f |= US_FL_BAD_SENSE;
519 break;
520 case 'c':
521 f |= US_FL_FIX_CAPACITY;
522 break;
523 case 'd':
524 f |= US_FL_NO_READ_DISC_INFO;
525 break;
526 case 'e':
527 f |= US_FL_NO_READ_CAPACITY_16;
528 break;
529 case 'f':
530 f |= US_FL_NO_REPORT_OPCODES;
531 break;
532 case 'g':
533 f |= US_FL_MAX_SECTORS_240;
534 break;
535 case 'h':
536 f |= US_FL_CAPACITY_HEURISTICS;
537 break;
538 case 'i':
539 f |= US_FL_IGNORE_DEVICE;
540 break;
541 case 'j':
542 f |= US_FL_NO_REPORT_LUNS;
543 break;
544 case 'k':
545 f |= US_FL_NO_SAME;
546 break;
547 case 'l':
548 f |= US_FL_NOT_LOCKABLE;
549 break;
550 case 'm':
551 f |= US_FL_MAX_SECTORS_64;
552 break;
553 case 'n':
554 f |= US_FL_INITIAL_READ10;
555 break;
556 case 'o':
557 f |= US_FL_CAPACITY_OK;
558 break;
559 case 'p':
560 f |= US_FL_WRITE_CACHE;
561 break;
562 case 'r':
563 f |= US_FL_IGNORE_RESIDUE;
564 break;
565 case 's':
566 f |= US_FL_SINGLE_LUN;
567 break;
568 case 't':
569 f |= US_FL_NO_ATA_1X;
570 break;
571 case 'u':
572 f |= US_FL_IGNORE_UAS;
573 break;
574 case 'w':
575 f |= US_FL_NO_WP_DETECT;
576 break;
577 case 'y':
578 f |= US_FL_ALWAYS_SYNC;
579 break;
580
581 }
582 }
583 *fflags = (*fflags & ~mask) | f;
584}
585EXPORT_SYMBOL_GPL(usb_stor_adjust_quirks);
586
587
588static int get_device_info(struct us_data *us, const struct usb_device_id *id,
589 const struct us_unusual_dev *unusual_dev)
590{
591 struct usb_device *dev = us->pusb_dev;
592 struct usb_interface_descriptor *idesc =
593 &us->pusb_intf->cur_altsetting->desc;
594 struct device *pdev = &us->pusb_intf->dev;
595
596
597 us->unusual_dev = unusual_dev;
598 us->subclass = (unusual_dev->useProtocol == USB_SC_DEVICE) ?
599 idesc->bInterfaceSubClass :
600 unusual_dev->useProtocol;
601 us->protocol = (unusual_dev->useTransport == USB_PR_DEVICE) ?
602 idesc->bInterfaceProtocol :
603 unusual_dev->useTransport;
604 us->fflags = id->driver_info;
605 usb_stor_adjust_quirks(us->pusb_dev, &us->fflags);
606
607 if (us->fflags & US_FL_IGNORE_DEVICE) {
608 dev_info(pdev, "device ignored\n");
609 return -ENODEV;
610 }
611
612
613
614
615
616 if (dev->speed != USB_SPEED_HIGH)
617 us->fflags &= ~US_FL_GO_SLOW;
618
619 if (us->fflags)
620 dev_info(pdev, "Quirks match for vid %04x pid %04x: %lx\n",
621 le16_to_cpu(dev->descriptor.idVendor),
622 le16_to_cpu(dev->descriptor.idProduct),
623 us->fflags);
624
625
626
627
628
629
630
631 if (id->idVendor || id->idProduct) {
632 static const char *msgs[3] = {
633 "an unneeded SubClass entry",
634 "an unneeded Protocol entry",
635 "unneeded SubClass and Protocol entries"};
636 struct usb_device_descriptor *ddesc = &dev->descriptor;
637 int msg = -1;
638
639 if (unusual_dev->useProtocol != USB_SC_DEVICE &&
640 us->subclass == idesc->bInterfaceSubClass)
641 msg += 1;
642 if (unusual_dev->useTransport != USB_PR_DEVICE &&
643 us->protocol == idesc->bInterfaceProtocol)
644 msg += 2;
645 if (msg >= 0 && !(us->fflags & US_FL_NEED_OVERRIDE))
646 dev_notice(pdev, "This device "
647 "(%04x,%04x,%04x S %02x P %02x)"
648 " has %s in unusual_devs.h (kernel"
649 " %s)\n"
650 " Please send a copy of this message to "
651 "<linux-usb@vger.kernel.org> and "
652 "<usb-storage@lists.one-eyed-alien.net>\n",
653 le16_to_cpu(ddesc->idVendor),
654 le16_to_cpu(ddesc->idProduct),
655 le16_to_cpu(ddesc->bcdDevice),
656 idesc->bInterfaceSubClass,
657 idesc->bInterfaceProtocol,
658 msgs[msg],
659 utsname()->release);
660 }
661
662 return 0;
663}
664
665
666static void get_transport(struct us_data *us)
667{
668 switch (us->protocol) {
669 case USB_PR_CB:
670 us->transport_name = "Control/Bulk";
671 us->transport = usb_stor_CB_transport;
672 us->transport_reset = usb_stor_CB_reset;
673 us->max_lun = 7;
674 break;
675
676 case USB_PR_CBI:
677 us->transport_name = "Control/Bulk/Interrupt";
678 us->transport = usb_stor_CB_transport;
679 us->transport_reset = usb_stor_CB_reset;
680 us->max_lun = 7;
681 break;
682
683 case USB_PR_BULK:
684 us->transport_name = "Bulk";
685 us->transport = usb_stor_Bulk_transport;
686 us->transport_reset = usb_stor_Bulk_reset;
687 break;
688 }
689}
690
691
692static void get_protocol(struct us_data *us)
693{
694 switch (us->subclass) {
695 case USB_SC_RBC:
696 us->protocol_name = "Reduced Block Commands (RBC)";
697 us->proto_handler = usb_stor_transparent_scsi_command;
698 break;
699
700 case USB_SC_8020:
701 us->protocol_name = "8020i";
702 us->proto_handler = usb_stor_pad12_command;
703 us->max_lun = 0;
704 break;
705
706 case USB_SC_QIC:
707 us->protocol_name = "QIC-157";
708 us->proto_handler = usb_stor_pad12_command;
709 us->max_lun = 0;
710 break;
711
712 case USB_SC_8070:
713 us->protocol_name = "8070i";
714 us->proto_handler = usb_stor_pad12_command;
715 us->max_lun = 0;
716 break;
717
718 case USB_SC_SCSI:
719 us->protocol_name = "Transparent SCSI";
720 us->proto_handler = usb_stor_transparent_scsi_command;
721 break;
722
723 case USB_SC_UFI:
724 us->protocol_name = "Uniform Floppy Interface (UFI)";
725 us->proto_handler = usb_stor_ufi_command;
726 break;
727 }
728}
729
730
731static int get_pipes(struct us_data *us)
732{
733 struct usb_host_interface *alt = us->pusb_intf->cur_altsetting;
734 struct usb_endpoint_descriptor *ep_in;
735 struct usb_endpoint_descriptor *ep_out;
736 struct usb_endpoint_descriptor *ep_int;
737 int res;
738
739
740
741
742
743
744
745 res = usb_find_common_endpoints(alt, &ep_in, &ep_out, NULL, NULL);
746 if (res) {
747 usb_stor_dbg(us, "bulk endpoints not found\n");
748 return res;
749 }
750
751 res = usb_find_int_in_endpoint(alt, &ep_int);
752 if (res && us->protocol == USB_PR_CBI) {
753 usb_stor_dbg(us, "interrupt endpoint not found\n");
754 return res;
755 }
756
757
758 us->send_ctrl_pipe = usb_sndctrlpipe(us->pusb_dev, 0);
759 us->recv_ctrl_pipe = usb_rcvctrlpipe(us->pusb_dev, 0);
760 us->send_bulk_pipe = usb_sndbulkpipe(us->pusb_dev,
761 usb_endpoint_num(ep_out));
762 us->recv_bulk_pipe = usb_rcvbulkpipe(us->pusb_dev,
763 usb_endpoint_num(ep_in));
764 if (ep_int) {
765 us->recv_intr_pipe = usb_rcvintpipe(us->pusb_dev,
766 usb_endpoint_num(ep_int));
767 us->ep_bInterval = ep_int->bInterval;
768 }
769 return 0;
770}
771
772
773static int usb_stor_acquire_resources(struct us_data *us)
774{
775 int p;
776 struct task_struct *th;
777
778 us->current_urb = usb_alloc_urb(0, GFP_KERNEL);
779 if (!us->current_urb)
780 return -ENOMEM;
781
782
783
784
785
786 if (us->unusual_dev->initFunction) {
787 p = us->unusual_dev->initFunction(us);
788 if (p)
789 return p;
790 }
791
792
793 th = kthread_run(usb_stor_control_thread, us, "usb-storage");
794 if (IS_ERR(th)) {
795 dev_warn(&us->pusb_intf->dev,
796 "Unable to start control thread\n");
797 return PTR_ERR(th);
798 }
799 us->ctl_thread = th;
800
801 return 0;
802}
803
804
805static void usb_stor_release_resources(struct us_data *us)
806{
807
808
809
810
811
812 usb_stor_dbg(us, "-- sending exit command to thread\n");
813 complete(&us->cmnd_ready);
814 if (us->ctl_thread)
815 kthread_stop(us->ctl_thread);
816
817
818 if (us->extra_destructor) {
819 usb_stor_dbg(us, "-- calling extra_destructor()\n");
820 us->extra_destructor(us->extra);
821 }
822
823
824 kfree(us->extra);
825 usb_free_urb(us->current_urb);
826}
827
828
829static void dissociate_dev(struct us_data *us)
830{
831
832 kfree(us->cr);
833 usb_free_coherent(us->pusb_dev, US_IOBUF_SIZE, us->iobuf, us->iobuf_dma);
834
835
836 usb_set_intfdata(us->pusb_intf, NULL);
837}
838
839
840
841
842
843static void quiesce_and_remove_host(struct us_data *us)
844{
845 struct Scsi_Host *host = us_to_host(us);
846
847
848 if (us->pusb_dev->state == USB_STATE_NOTATTACHED) {
849 set_bit(US_FLIDX_DISCONNECTING, &us->dflags);
850 wake_up(&us->delay_wait);
851 }
852
853
854
855
856
857 cancel_delayed_work_sync(&us->scan_dwork);
858
859
860 if (test_bit(US_FLIDX_SCAN_PENDING, &us->dflags))
861 usb_autopm_put_interface_no_suspend(us->pusb_intf);
862
863
864
865
866
867 scsi_remove_host(host);
868
869
870
871
872
873 scsi_lock(host);
874 set_bit(US_FLIDX_DISCONNECTING, &us->dflags);
875 scsi_unlock(host);
876 wake_up(&us->delay_wait);
877}
878
879
880static void release_everything(struct us_data *us)
881{
882 usb_stor_release_resources(us);
883 dissociate_dev(us);
884
885
886
887
888
889 scsi_host_put(us_to_host(us));
890}
891
892
893static void usb_stor_scan_dwork(struct work_struct *work)
894{
895 struct us_data *us = container_of(work, struct us_data,
896 scan_dwork.work);
897 struct device *dev = &us->pusb_intf->dev;
898
899 dev_dbg(dev, "starting scan\n");
900
901
902 if (us->protocol == USB_PR_BULK &&
903 !(us->fflags & US_FL_SINGLE_LUN) &&
904 !(us->fflags & US_FL_SCM_MULT_TARG)) {
905 mutex_lock(&us->dev_mutex);
906 us->max_lun = usb_stor_Bulk_max_lun(us);
907
908
909
910
911
912 if (us->max_lun >= 8)
913 us_to_host(us)->max_lun = us->max_lun+1;
914 mutex_unlock(&us->dev_mutex);
915 }
916 scsi_scan_host(us_to_host(us));
917 dev_dbg(dev, "scan complete\n");
918
919
920
921 usb_autopm_put_interface(us->pusb_intf);
922 clear_bit(US_FLIDX_SCAN_PENDING, &us->dflags);
923}
924
925static unsigned int usb_stor_sg_tablesize(struct usb_interface *intf)
926{
927 struct usb_device *usb_dev = interface_to_usbdev(intf);
928
929 if (usb_dev->bus->sg_tablesize) {
930 return usb_dev->bus->sg_tablesize;
931 }
932 return SG_ALL;
933}
934
935
936int usb_stor_probe1(struct us_data **pus,
937 struct usb_interface *intf,
938 const struct usb_device_id *id,
939 const struct us_unusual_dev *unusual_dev,
940 struct scsi_host_template *sht)
941{
942 struct Scsi_Host *host;
943 struct us_data *us;
944 int result;
945
946 dev_info(&intf->dev, "USB Mass Storage device detected\n");
947
948
949
950
951
952 host = scsi_host_alloc(sht, sizeof(*us));
953 if (!host) {
954 dev_warn(&intf->dev, "Unable to allocate the scsi host\n");
955 return -ENOMEM;
956 }
957
958
959
960
961 host->max_cmd_len = 16;
962 host->sg_tablesize = usb_stor_sg_tablesize(intf);
963 *pus = us = host_to_us(host);
964 mutex_init(&(us->dev_mutex));
965 us_set_lock_class(&us->dev_mutex, intf);
966 init_completion(&us->cmnd_ready);
967 init_completion(&(us->notify));
968 init_waitqueue_head(&us->delay_wait);
969 INIT_DELAYED_WORK(&us->scan_dwork, usb_stor_scan_dwork);
970
971
972 result = associate_dev(us, intf);
973 if (result)
974 goto BadDevice;
975
976
977 result = get_device_info(us, id, unusual_dev);
978 if (result)
979 goto BadDevice;
980
981
982 get_transport(us);
983 get_protocol(us);
984
985
986
987
988
989 return 0;
990
991BadDevice:
992 usb_stor_dbg(us, "storage_probe() failed\n");
993 release_everything(us);
994 return result;
995}
996EXPORT_SYMBOL_GPL(usb_stor_probe1);
997
998
999int usb_stor_probe2(struct us_data *us)
1000{
1001 int result;
1002 struct device *dev = &us->pusb_intf->dev;
1003
1004
1005 if (!us->transport || !us->proto_handler) {
1006 result = -ENXIO;
1007 goto BadDevice;
1008 }
1009 usb_stor_dbg(us, "Transport: %s\n", us->transport_name);
1010 usb_stor_dbg(us, "Protocol: %s\n", us->protocol_name);
1011
1012 if (us->fflags & US_FL_SCM_MULT_TARG) {
1013
1014
1015
1016
1017 us->max_lun = 7;
1018
1019 us_to_host(us)->this_id = 7;
1020
1021 } else {
1022
1023 us_to_host(us)->max_id = 1;
1024
1025
1026
1027
1028
1029 if (us->transport == usb_stor_Bulk_transport)
1030 us_to_host(us)->no_scsi2_lun_in_cdb = 1;
1031 }
1032
1033
1034 if (us->fflags & US_FL_SINGLE_LUN)
1035 us->max_lun = 0;
1036
1037
1038 result = get_pipes(us);
1039 if (result)
1040 goto BadDevice;
1041
1042
1043
1044
1045
1046 if (us->fflags & US_FL_INITIAL_READ10)
1047 set_bit(US_FLIDX_REDO_READ10, &us->dflags);
1048
1049
1050 result = usb_stor_acquire_resources(us);
1051 if (result)
1052 goto BadDevice;
1053 usb_autopm_get_interface_no_resume(us->pusb_intf);
1054 snprintf(us->scsi_name, sizeof(us->scsi_name), "usb-storage %s",
1055 dev_name(&us->pusb_intf->dev));
1056 result = scsi_add_host(us_to_host(us), dev);
1057 if (result) {
1058 dev_warn(dev,
1059 "Unable to add the scsi host\n");
1060 goto HostAddErr;
1061 }
1062
1063
1064 set_bit(US_FLIDX_SCAN_PENDING, &us->dflags);
1065
1066 if (delay_use > 0)
1067 dev_dbg(dev, "waiting for device to settle before scanning\n");
1068 queue_delayed_work(system_freezable_wq, &us->scan_dwork,
1069 delay_use * HZ);
1070 return 0;
1071
1072
1073HostAddErr:
1074 usb_autopm_put_interface_no_suspend(us->pusb_intf);
1075BadDevice:
1076 usb_stor_dbg(us, "storage_probe() failed\n");
1077 release_everything(us);
1078 return result;
1079}
1080EXPORT_SYMBOL_GPL(usb_stor_probe2);
1081
1082
1083void usb_stor_disconnect(struct usb_interface *intf)
1084{
1085 struct us_data *us = usb_get_intfdata(intf);
1086
1087 quiesce_and_remove_host(us);
1088 release_everything(us);
1089}
1090EXPORT_SYMBOL_GPL(usb_stor_disconnect);
1091
1092static struct scsi_host_template usb_stor_host_template;
1093
1094
1095static int storage_probe(struct usb_interface *intf,
1096 const struct usb_device_id *id)
1097{
1098 const struct us_unusual_dev *unusual_dev;
1099 struct us_data *us;
1100 int result;
1101 int size;
1102
1103
1104#if IS_ENABLED(CONFIG_USB_UAS)
1105 if (uas_use_uas_driver(intf, id, NULL))
1106 return -ENXIO;
1107#endif
1108
1109
1110
1111
1112
1113 if (usb_usual_ignore_device(intf))
1114 return -ENXIO;
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124 size = ARRAY_SIZE(us_unusual_dev_list);
1125 if (id >= usb_storage_usb_ids && id < usb_storage_usb_ids + size) {
1126 unusual_dev = (id - usb_storage_usb_ids) + us_unusual_dev_list;
1127 } else {
1128 unusual_dev = &for_dynamic_ids;
1129
1130 dev_dbg(&intf->dev, "Use Bulk-Only transport with the Transparent SCSI protocol for dynamic id: 0x%04x 0x%04x\n",
1131 id->idVendor, id->idProduct);
1132 }
1133
1134 result = usb_stor_probe1(&us, intf, id, unusual_dev,
1135 &usb_stor_host_template);
1136 if (result)
1137 return result;
1138
1139
1140
1141 result = usb_stor_probe2(us);
1142 return result;
1143}
1144
1145static struct usb_driver usb_storage_driver = {
1146 .name = DRV_NAME,
1147 .probe = storage_probe,
1148 .disconnect = usb_stor_disconnect,
1149 .suspend = usb_stor_suspend,
1150 .resume = usb_stor_resume,
1151 .reset_resume = usb_stor_reset_resume,
1152 .pre_reset = usb_stor_pre_reset,
1153 .post_reset = usb_stor_post_reset,
1154 .id_table = usb_storage_usb_ids,
1155 .supports_autosuspend = 1,
1156 .soft_unbind = 1,
1157};
1158
1159module_usb_stor_driver(usb_storage_driver, usb_stor_host_template, DRV_NAME);
1160