1
2
3
4
5
6
7
8
9
10#define DRIVER_NAME "ms_block"
11#define pr_fmt(fmt) DRIVER_NAME ": " fmt
12
13#include <linux/module.h>
14#include <linux/blk-mq.h>
15#include <linux/memstick.h>
16#include <linux/idr.h>
17#include <linux/hdreg.h>
18#include <linux/delay.h>
19#include <linux/slab.h>
20#include <linux/random.h>
21#include <linux/bitmap.h>
22#include <linux/scatterlist.h>
23#include <linux/jiffies.h>
24#include <linux/workqueue.h>
25#include <linux/mutex.h>
26#include "ms_block.h"
27
28static int debug;
29static int cache_flush_timeout = 1000;
30static bool verify_writes;
31
32
33
34
35
36static size_t msb_sg_copy(struct scatterlist *sg_from,
37 struct scatterlist *sg_to, int to_nents, size_t offset, size_t len)
38{
39 size_t copied = 0;
40
41 while (offset > 0) {
42 if (offset >= sg_from->length) {
43 if (sg_is_last(sg_from))
44 return 0;
45
46 offset -= sg_from->length;
47 sg_from = sg_next(sg_from);
48 continue;
49 }
50
51 copied = min(len, sg_from->length - offset);
52 sg_set_page(sg_to, sg_page(sg_from),
53 copied, sg_from->offset + offset);
54
55 len -= copied;
56 offset = 0;
57
58 if (sg_is_last(sg_from) || !len)
59 goto out;
60
61 sg_to = sg_next(sg_to);
62 to_nents--;
63 sg_from = sg_next(sg_from);
64 }
65
66 while (len > sg_from->length && to_nents--) {
67 len -= sg_from->length;
68 copied += sg_from->length;
69
70 sg_set_page(sg_to, sg_page(sg_from),
71 sg_from->length, sg_from->offset);
72
73 if (sg_is_last(sg_from) || !len)
74 goto out;
75
76 sg_from = sg_next(sg_from);
77 sg_to = sg_next(sg_to);
78 }
79
80 if (len && to_nents) {
81 sg_set_page(sg_to, sg_page(sg_from), len, sg_from->offset);
82 copied += len;
83 }
84out:
85 sg_mark_end(sg_to);
86 return copied;
87}
88
89
90
91
92
93
94static int msb_sg_compare_to_buffer(struct scatterlist *sg,
95 size_t offset, u8 *buffer, size_t len)
96{
97 int retval = 0, cmplen;
98 struct sg_mapping_iter miter;
99
100 sg_miter_start(&miter, sg, sg_nents(sg),
101 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
102
103 while (sg_miter_next(&miter) && len > 0) {
104 if (offset >= miter.length) {
105 offset -= miter.length;
106 continue;
107 }
108
109 cmplen = min(miter.length - offset, len);
110 retval = memcmp(miter.addr + offset, buffer, cmplen) ? -1 : 0;
111 if (retval)
112 break;
113
114 buffer += cmplen;
115 len -= cmplen;
116 offset = 0;
117 }
118
119 if (!retval && len)
120 retval = -1;
121
122 sg_miter_stop(&miter);
123 return retval;
124}
125
126
127
128
129
130
131
132
133static int msb_get_zone_from_lba(int lba)
134{
135 if (lba < 494)
136 return 0;
137 return ((lba - 494) / 496) + 1;
138}
139
140
141static int msb_get_zone_from_pba(int pba)
142{
143 return pba / MS_BLOCKS_IN_ZONE;
144}
145
146
147static int msb_validate_used_block_bitmap(struct msb_data *msb)
148{
149 int total_free_blocks = 0;
150 int i;
151
152 if (!debug)
153 return 0;
154
155 for (i = 0; i < msb->zone_count; i++)
156 total_free_blocks += msb->free_block_count[i];
157
158 if (msb->block_count - bitmap_weight(msb->used_blocks_bitmap,
159 msb->block_count) == total_free_blocks)
160 return 0;
161
162 pr_err("BUG: free block counts don't match the bitmap");
163 msb->read_only = true;
164 return -EINVAL;
165}
166
167
168static void msb_mark_block_used(struct msb_data *msb, int pba)
169{
170 int zone = msb_get_zone_from_pba(pba);
171
172 if (test_bit(pba, msb->used_blocks_bitmap)) {
173 pr_err(
174 "BUG: attempt to mark already used pba %d as used", pba);
175 msb->read_only = true;
176 return;
177 }
178
179 if (msb_validate_used_block_bitmap(msb))
180 return;
181
182
183 __set_bit(pba, msb->used_blocks_bitmap);
184 msb->free_block_count[zone]--;
185}
186
187
188static void msb_mark_block_unused(struct msb_data *msb, int pba)
189{
190 int zone = msb_get_zone_from_pba(pba);
191
192 if (!test_bit(pba, msb->used_blocks_bitmap)) {
193 pr_err("BUG: attempt to mark already unused pba %d as unused" , pba);
194 msb->read_only = true;
195 return;
196 }
197
198 if (msb_validate_used_block_bitmap(msb))
199 return;
200
201
202 __clear_bit(pba, msb->used_blocks_bitmap);
203 msb->free_block_count[zone]++;
204}
205
206
207static void msb_invalidate_reg_window(struct msb_data *msb)
208{
209 msb->reg_addr.w_offset = offsetof(struct ms_register, id);
210 msb->reg_addr.w_length = sizeof(struct ms_id_register);
211 msb->reg_addr.r_offset = offsetof(struct ms_register, id);
212 msb->reg_addr.r_length = sizeof(struct ms_id_register);
213 msb->addr_valid = false;
214}
215
216
217static int msb_run_state_machine(struct msb_data *msb, int (*state_func)
218 (struct memstick_dev *card, struct memstick_request **req))
219{
220 struct memstick_dev *card = msb->card;
221
222 WARN_ON(msb->state != -1);
223 msb->int_polling = false;
224 msb->state = 0;
225 msb->exit_error = 0;
226
227 memset(&card->current_mrq, 0, sizeof(card->current_mrq));
228
229 card->next_request = state_func;
230 memstick_new_req(card->host);
231 wait_for_completion(&card->mrq_complete);
232
233 WARN_ON(msb->state != -1);
234 return msb->exit_error;
235}
236
237
238static int msb_exit_state_machine(struct msb_data *msb, int error)
239{
240 WARN_ON(msb->state == -1);
241
242 msb->state = -1;
243 msb->exit_error = error;
244 msb->card->next_request = h_msb_default_bad;
245
246
247 if (error)
248 msb_invalidate_reg_window(msb);
249
250 complete(&msb->card->mrq_complete);
251 return -ENXIO;
252}
253
254
255static int msb_read_int_reg(struct msb_data *msb, long timeout)
256{
257 struct memstick_request *mrq = &msb->card->current_mrq;
258
259 WARN_ON(msb->state == -1);
260
261 if (!msb->int_polling) {
262 msb->int_timeout = jiffies +
263 msecs_to_jiffies(timeout == -1 ? 500 : timeout);
264 msb->int_polling = true;
265 } else if (time_after(jiffies, msb->int_timeout)) {
266 mrq->data[0] = MEMSTICK_INT_CMDNAK;
267 return 0;
268 }
269
270 if ((msb->caps & MEMSTICK_CAP_AUTO_GET_INT) &&
271 mrq->need_card_int && !mrq->error) {
272 mrq->data[0] = mrq->int_reg;
273 mrq->need_card_int = false;
274 return 0;
275 } else {
276 memstick_init_req(mrq, MS_TPC_GET_INT, NULL, 1);
277 return 1;
278 }
279}
280
281
282static int msb_read_regs(struct msb_data *msb, int offset, int len)
283{
284 struct memstick_request *req = &msb->card->current_mrq;
285
286 if (msb->reg_addr.r_offset != offset ||
287 msb->reg_addr.r_length != len || !msb->addr_valid) {
288
289 msb->reg_addr.r_offset = offset;
290 msb->reg_addr.r_length = len;
291 msb->addr_valid = true;
292
293 memstick_init_req(req, MS_TPC_SET_RW_REG_ADRS,
294 &msb->reg_addr, sizeof(msb->reg_addr));
295 return 0;
296 }
297
298 memstick_init_req(req, MS_TPC_READ_REG, NULL, len);
299 return 1;
300}
301
302
303static int msb_write_regs(struct msb_data *msb, int offset, int len, void *buf)
304{
305 struct memstick_request *req = &msb->card->current_mrq;
306
307 if (msb->reg_addr.w_offset != offset ||
308 msb->reg_addr.w_length != len || !msb->addr_valid) {
309
310 msb->reg_addr.w_offset = offset;
311 msb->reg_addr.w_length = len;
312 msb->addr_valid = true;
313
314 memstick_init_req(req, MS_TPC_SET_RW_REG_ADRS,
315 &msb->reg_addr, sizeof(msb->reg_addr));
316 return 0;
317 }
318
319 memstick_init_req(req, MS_TPC_WRITE_REG, buf, len);
320 return 1;
321}
322
323
324static int h_msb_default_bad(struct memstick_dev *card,
325 struct memstick_request **mrq)
326{
327 return -ENXIO;
328}
329
330
331
332
333
334
335static int h_msb_read_page(struct memstick_dev *card,
336 struct memstick_request **out_mrq)
337{
338 struct msb_data *msb = memstick_get_drvdata(card);
339 struct memstick_request *mrq = *out_mrq = &card->current_mrq;
340 struct scatterlist sg[2];
341 u8 command, intreg;
342
343 if (mrq->error) {
344 dbg("read_page, unknown error");
345 return msb_exit_state_machine(msb, mrq->error);
346 }
347again:
348 switch (msb->state) {
349 case MSB_RP_SEND_BLOCK_ADDRESS:
350
351
352
353
354 if (!msb_write_regs(msb,
355 offsetof(struct ms_register, param),
356 sizeof(struct ms_param_register),
357 (unsigned char *)&msb->regs.param))
358 return 0;
359
360 msb->state = MSB_RP_SEND_READ_COMMAND;
361 return 0;
362
363 case MSB_RP_SEND_READ_COMMAND:
364 command = MS_CMD_BLOCK_READ;
365 memstick_init_req(mrq, MS_TPC_SET_CMD, &command, 1);
366 msb->state = MSB_RP_SEND_INT_REQ;
367 return 0;
368
369 case MSB_RP_SEND_INT_REQ:
370 msb->state = MSB_RP_RECEIVE_INT_REQ_RESULT;
371
372
373
374 if (msb_read_int_reg(msb, -1))
375 return 0;
376 fallthrough;
377
378 case MSB_RP_RECEIVE_INT_REQ_RESULT:
379 intreg = mrq->data[0];
380 msb->regs.status.interrupt = intreg;
381
382 if (intreg & MEMSTICK_INT_CMDNAK)
383 return msb_exit_state_machine(msb, -EIO);
384
385 if (!(intreg & MEMSTICK_INT_CED)) {
386 msb->state = MSB_RP_SEND_INT_REQ;
387 goto again;
388 }
389
390 msb->int_polling = false;
391 msb->state = (intreg & MEMSTICK_INT_ERR) ?
392 MSB_RP_SEND_READ_STATUS_REG : MSB_RP_SEND_OOB_READ;
393 goto again;
394
395 case MSB_RP_SEND_READ_STATUS_REG:
396
397 if (!msb_read_regs(msb,
398 offsetof(struct ms_register, status),
399 sizeof(struct ms_status_register)))
400 return 0;
401
402 msb->state = MSB_RP_RECEIVE_STATUS_REG;
403 return 0;
404
405 case MSB_RP_RECEIVE_STATUS_REG:
406 msb->regs.status = *(struct ms_status_register *)mrq->data;
407 msb->state = MSB_RP_SEND_OOB_READ;
408 fallthrough;
409
410 case MSB_RP_SEND_OOB_READ:
411 if (!msb_read_regs(msb,
412 offsetof(struct ms_register, extra_data),
413 sizeof(struct ms_extra_data_register)))
414 return 0;
415
416 msb->state = MSB_RP_RECEIVE_OOB_READ;
417 return 0;
418
419 case MSB_RP_RECEIVE_OOB_READ:
420 msb->regs.extra_data =
421 *(struct ms_extra_data_register *) mrq->data;
422 msb->state = MSB_RP_SEND_READ_DATA;
423 fallthrough;
424
425 case MSB_RP_SEND_READ_DATA:
426
427 if (msb->regs.param.cp == MEMSTICK_CP_EXTRA) {
428 msb->state = MSB_RP_RECEIVE_READ_DATA;
429 goto again;
430 }
431
432 sg_init_table(sg, ARRAY_SIZE(sg));
433 msb_sg_copy(msb->current_sg, sg, ARRAY_SIZE(sg),
434 msb->current_sg_offset,
435 msb->page_size);
436
437 memstick_init_req_sg(mrq, MS_TPC_READ_LONG_DATA, sg);
438 msb->state = MSB_RP_RECEIVE_READ_DATA;
439 return 0;
440
441 case MSB_RP_RECEIVE_READ_DATA:
442 if (!(msb->regs.status.interrupt & MEMSTICK_INT_ERR)) {
443 msb->current_sg_offset += msb->page_size;
444 return msb_exit_state_machine(msb, 0);
445 }
446
447 if (msb->regs.status.status1 & MEMSTICK_UNCORR_ERROR) {
448 dbg("read_page: uncorrectable error");
449 return msb_exit_state_machine(msb, -EBADMSG);
450 }
451
452 if (msb->regs.status.status1 & MEMSTICK_CORR_ERROR) {
453 dbg("read_page: correctable error");
454 msb->current_sg_offset += msb->page_size;
455 return msb_exit_state_machine(msb, -EUCLEAN);
456 } else {
457 dbg("read_page: INT error, but no status error bits");
458 return msb_exit_state_machine(msb, -EIO);
459 }
460 }
461
462 BUG();
463}
464
465
466
467
468
469
470
471
472
473static int h_msb_write_block(struct memstick_dev *card,
474 struct memstick_request **out_mrq)
475{
476 struct msb_data *msb = memstick_get_drvdata(card);
477 struct memstick_request *mrq = *out_mrq = &card->current_mrq;
478 struct scatterlist sg[2];
479 u8 intreg, command;
480
481 if (mrq->error)
482 return msb_exit_state_machine(msb, mrq->error);
483
484again:
485 switch (msb->state) {
486
487
488
489
490
491
492
493 case MSB_WB_SEND_WRITE_PARAMS:
494 if (!msb_write_regs(msb,
495 offsetof(struct ms_register, param),
496 sizeof(struct ms_param_register),
497 &msb->regs.param))
498 return 0;
499
500 msb->state = MSB_WB_SEND_WRITE_OOB;
501 return 0;
502
503 case MSB_WB_SEND_WRITE_OOB:
504 if (!msb_write_regs(msb,
505 offsetof(struct ms_register, extra_data),
506 sizeof(struct ms_extra_data_register),
507 &msb->regs.extra_data))
508 return 0;
509 msb->state = MSB_WB_SEND_WRITE_COMMAND;
510 return 0;
511
512
513 case MSB_WB_SEND_WRITE_COMMAND:
514 command = MS_CMD_BLOCK_WRITE;
515 memstick_init_req(mrq, MS_TPC_SET_CMD, &command, 1);
516 msb->state = MSB_WB_SEND_INT_REQ;
517 return 0;
518
519 case MSB_WB_SEND_INT_REQ:
520 msb->state = MSB_WB_RECEIVE_INT_REQ;
521 if (msb_read_int_reg(msb, -1))
522 return 0;
523 fallthrough;
524
525 case MSB_WB_RECEIVE_INT_REQ:
526 intreg = mrq->data[0];
527 msb->regs.status.interrupt = intreg;
528
529
530 if (intreg & (MEMSTICK_INT_CMDNAK))
531 return msb_exit_state_machine(msb, -EIO);
532
533 if (intreg & MEMSTICK_INT_ERR)
534 return msb_exit_state_machine(msb, -EBADMSG);
535
536
537
538 if (msb->current_page == msb->pages_in_block) {
539 if (intreg & MEMSTICK_INT_CED)
540 return msb_exit_state_machine(msb, 0);
541 msb->state = MSB_WB_SEND_INT_REQ;
542 goto again;
543
544 }
545
546
547 if (!(intreg & MEMSTICK_INT_BREQ)) {
548 msb->state = MSB_WB_SEND_INT_REQ;
549 goto again;
550 }
551
552 msb->int_polling = false;
553 msb->state = MSB_WB_SEND_WRITE_DATA;
554 fallthrough;
555
556 case MSB_WB_SEND_WRITE_DATA:
557 sg_init_table(sg, ARRAY_SIZE(sg));
558
559 if (msb_sg_copy(msb->current_sg, sg, ARRAY_SIZE(sg),
560 msb->current_sg_offset,
561 msb->page_size) < msb->page_size)
562 return msb_exit_state_machine(msb, -EIO);
563
564 memstick_init_req_sg(mrq, MS_TPC_WRITE_LONG_DATA, sg);
565 mrq->need_card_int = 1;
566 msb->state = MSB_WB_RECEIVE_WRITE_CONFIRMATION;
567 return 0;
568
569 case MSB_WB_RECEIVE_WRITE_CONFIRMATION:
570 msb->current_page++;
571 msb->current_sg_offset += msb->page_size;
572 msb->state = MSB_WB_SEND_INT_REQ;
573 goto again;
574 default:
575 BUG();
576 }
577
578 return 0;
579}
580
581
582
583
584
585static int h_msb_send_command(struct memstick_dev *card,
586 struct memstick_request **out_mrq)
587{
588 struct msb_data *msb = memstick_get_drvdata(card);
589 struct memstick_request *mrq = *out_mrq = &card->current_mrq;
590 u8 intreg;
591
592 if (mrq->error) {
593 dbg("send_command: unknown error");
594 return msb_exit_state_machine(msb, mrq->error);
595 }
596again:
597 switch (msb->state) {
598
599
600 case MSB_SC_SEND_WRITE_PARAMS:
601 if (!msb_write_regs(msb,
602 offsetof(struct ms_register, param),
603 sizeof(struct ms_param_register),
604 &msb->regs.param))
605 return 0;
606 msb->state = MSB_SC_SEND_WRITE_OOB;
607 return 0;
608
609 case MSB_SC_SEND_WRITE_OOB:
610 if (!msb->command_need_oob) {
611 msb->state = MSB_SC_SEND_COMMAND;
612 goto again;
613 }
614
615 if (!msb_write_regs(msb,
616 offsetof(struct ms_register, extra_data),
617 sizeof(struct ms_extra_data_register),
618 &msb->regs.extra_data))
619 return 0;
620
621 msb->state = MSB_SC_SEND_COMMAND;
622 return 0;
623
624 case MSB_SC_SEND_COMMAND:
625 memstick_init_req(mrq, MS_TPC_SET_CMD, &msb->command_value, 1);
626 msb->state = MSB_SC_SEND_INT_REQ;
627 return 0;
628
629 case MSB_SC_SEND_INT_REQ:
630 msb->state = MSB_SC_RECEIVE_INT_REQ;
631 if (msb_read_int_reg(msb, -1))
632 return 0;
633 fallthrough;
634
635 case MSB_SC_RECEIVE_INT_REQ:
636 intreg = mrq->data[0];
637
638 if (intreg & MEMSTICK_INT_CMDNAK)
639 return msb_exit_state_machine(msb, -EIO);
640 if (intreg & MEMSTICK_INT_ERR)
641 return msb_exit_state_machine(msb, -EBADMSG);
642
643 if (!(intreg & MEMSTICK_INT_CED)) {
644 msb->state = MSB_SC_SEND_INT_REQ;
645 goto again;
646 }
647
648 return msb_exit_state_machine(msb, 0);
649 }
650
651 BUG();
652}
653
654
655static int h_msb_reset(struct memstick_dev *card,
656 struct memstick_request **out_mrq)
657{
658 u8 command = MS_CMD_RESET;
659 struct msb_data *msb = memstick_get_drvdata(card);
660 struct memstick_request *mrq = *out_mrq = &card->current_mrq;
661
662 if (mrq->error)
663 return msb_exit_state_machine(msb, mrq->error);
664
665 switch (msb->state) {
666 case MSB_RS_SEND:
667 memstick_init_req(mrq, MS_TPC_SET_CMD, &command, 1);
668 mrq->need_card_int = 0;
669 msb->state = MSB_RS_CONFIRM;
670 return 0;
671 case MSB_RS_CONFIRM:
672 return msb_exit_state_machine(msb, 0);
673 }
674 BUG();
675}
676
677
678static int h_msb_parallel_switch(struct memstick_dev *card,
679 struct memstick_request **out_mrq)
680{
681 struct msb_data *msb = memstick_get_drvdata(card);
682 struct memstick_request *mrq = *out_mrq = &card->current_mrq;
683 struct memstick_host *host = card->host;
684
685 if (mrq->error) {
686 dbg("parallel_switch: error");
687 msb->regs.param.system &= ~MEMSTICK_SYS_PAM;
688 return msb_exit_state_machine(msb, mrq->error);
689 }
690
691 switch (msb->state) {
692 case MSB_PS_SEND_SWITCH_COMMAND:
693
694 msb->regs.param.system |= MEMSTICK_SYS_PAM;
695
696 if (!msb_write_regs(msb,
697 offsetof(struct ms_register, param),
698 1,
699 (unsigned char *)&msb->regs.param))
700 return 0;
701
702 msb->state = MSB_PS_SWICH_HOST;
703 return 0;
704
705 case MSB_PS_SWICH_HOST:
706
707
708
709 host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_PAR4);
710 memstick_init_req(mrq, MS_TPC_GET_INT, NULL, 1);
711 msb->state = MSB_PS_CONFIRM;
712 return 0;
713
714 case MSB_PS_CONFIRM:
715 return msb_exit_state_machine(msb, 0);
716 }
717
718 BUG();
719}
720
721static int msb_switch_to_parallel(struct msb_data *msb);
722
723
724static int msb_reset(struct msb_data *msb, bool full)
725{
726
727 bool was_parallel = msb->regs.param.system & MEMSTICK_SYS_PAM;
728 struct memstick_dev *card = msb->card;
729 struct memstick_host *host = card->host;
730 int error;
731
732
733 msb->regs.param.system = MEMSTICK_SYS_BAMD;
734
735 if (full) {
736 error = host->set_param(host,
737 MEMSTICK_POWER, MEMSTICK_POWER_OFF);
738 if (error)
739 goto out_error;
740
741 msb_invalidate_reg_window(msb);
742
743 error = host->set_param(host,
744 MEMSTICK_POWER, MEMSTICK_POWER_ON);
745 if (error)
746 goto out_error;
747
748 error = host->set_param(host,
749 MEMSTICK_INTERFACE, MEMSTICK_SERIAL);
750 if (error) {
751out_error:
752 dbg("Failed to reset the host controller");
753 msb->read_only = true;
754 return -EFAULT;
755 }
756 }
757
758 error = msb_run_state_machine(msb, h_msb_reset);
759 if (error) {
760 dbg("Failed to reset the card");
761 msb->read_only = true;
762 return -ENODEV;
763 }
764
765
766 if (was_parallel)
767 msb_switch_to_parallel(msb);
768 return 0;
769}
770
771
772static int msb_switch_to_parallel(struct msb_data *msb)
773{
774 int error;
775
776 error = msb_run_state_machine(msb, h_msb_parallel_switch);
777 if (error) {
778 pr_err("Switch to parallel failed");
779 msb->regs.param.system &= ~MEMSTICK_SYS_PAM;
780 msb_reset(msb, true);
781 return -EFAULT;
782 }
783
784 msb->caps |= MEMSTICK_CAP_AUTO_GET_INT;
785 return 0;
786}
787
788
789static int msb_set_overwrite_flag(struct msb_data *msb,
790 u16 pba, u8 page, u8 flag)
791{
792 if (msb->read_only)
793 return -EROFS;
794
795 msb->regs.param.block_address = cpu_to_be16(pba);
796 msb->regs.param.page_address = page;
797 msb->regs.param.cp = MEMSTICK_CP_OVERWRITE;
798 msb->regs.extra_data.overwrite_flag = flag;
799 msb->command_value = MS_CMD_BLOCK_WRITE;
800 msb->command_need_oob = true;
801
802 dbg_verbose("changing overwrite flag to %02x for sector %d, page %d",
803 flag, pba, page);
804 return msb_run_state_machine(msb, h_msb_send_command);
805}
806
807static int msb_mark_bad(struct msb_data *msb, int pba)
808{
809 pr_notice("marking pba %d as bad", pba);
810 msb_reset(msb, true);
811 return msb_set_overwrite_flag(
812 msb, pba, 0, 0xFF & ~MEMSTICK_OVERWRITE_BKST);
813}
814
815static int msb_mark_page_bad(struct msb_data *msb, int pba, int page)
816{
817 dbg("marking page %d of pba %d as bad", page, pba);
818 msb_reset(msb, true);
819 return msb_set_overwrite_flag(msb,
820 pba, page, ~MEMSTICK_OVERWRITE_PGST0);
821}
822
823
824static int msb_erase_block(struct msb_data *msb, u16 pba)
825{
826 int error, try;
827
828 if (msb->read_only)
829 return -EROFS;
830
831 dbg_verbose("erasing pba %d", pba);
832
833 for (try = 1; try < 3; try++) {
834 msb->regs.param.block_address = cpu_to_be16(pba);
835 msb->regs.param.page_address = 0;
836 msb->regs.param.cp = MEMSTICK_CP_BLOCK;
837 msb->command_value = MS_CMD_BLOCK_ERASE;
838 msb->command_need_oob = false;
839
840
841 error = msb_run_state_machine(msb, h_msb_send_command);
842 if (!error || msb_reset(msb, true))
843 break;
844 }
845
846 if (error) {
847 pr_err("erase failed, marking pba %d as bad", pba);
848 msb_mark_bad(msb, pba);
849 }
850
851 dbg_verbose("erase success, marking pba %d as unused", pba);
852 msb_mark_block_unused(msb, pba);
853 __set_bit(pba, msb->erased_blocks_bitmap);
854 return error;
855}
856
857
858static int msb_read_page(struct msb_data *msb,
859 u16 pba, u8 page, struct ms_extra_data_register *extra,
860 struct scatterlist *sg, int offset)
861{
862 int try, error;
863
864 if (pba == MS_BLOCK_INVALID) {
865 unsigned long flags;
866 struct sg_mapping_iter miter;
867 size_t len = msb->page_size;
868
869 dbg_verbose("read unmapped sector. returning 0xFF");
870
871 local_irq_save(flags);
872 sg_miter_start(&miter, sg, sg_nents(sg),
873 SG_MITER_ATOMIC | SG_MITER_TO_SG);
874
875 while (sg_miter_next(&miter) && len > 0) {
876
877 int chunklen;
878
879 if (offset && offset >= miter.length) {
880 offset -= miter.length;
881 continue;
882 }
883
884 chunklen = min(miter.length - offset, len);
885 memset(miter.addr + offset, 0xFF, chunklen);
886 len -= chunklen;
887 offset = 0;
888 }
889
890 sg_miter_stop(&miter);
891 local_irq_restore(flags);
892
893 if (offset)
894 return -EFAULT;
895
896 if (extra)
897 memset(extra, 0xFF, sizeof(*extra));
898 return 0;
899 }
900
901 if (pba >= msb->block_count) {
902 pr_err("BUG: attempt to read beyond the end of the card at pba %d", pba);
903 return -EINVAL;
904 }
905
906 for (try = 1; try < 3; try++) {
907 msb->regs.param.block_address = cpu_to_be16(pba);
908 msb->regs.param.page_address = page;
909 msb->regs.param.cp = MEMSTICK_CP_PAGE;
910
911 msb->current_sg = sg;
912 msb->current_sg_offset = offset;
913 error = msb_run_state_machine(msb, h_msb_read_page);
914
915
916 if (error == -EUCLEAN) {
917 pr_notice("correctable error on pba %d, page %d",
918 pba, page);
919 error = 0;
920 }
921
922 if (!error && extra)
923 *extra = msb->regs.extra_data;
924
925 if (!error || msb_reset(msb, true))
926 break;
927
928 }
929
930
931 if (error == -EBADMSG) {
932 pr_err("uncorrectable error on read of pba %d, page %d",
933 pba, page);
934
935 if (msb->regs.extra_data.overwrite_flag &
936 MEMSTICK_OVERWRITE_PGST0)
937 msb_mark_page_bad(msb, pba, page);
938 return -EBADMSG;
939 }
940
941 if (error)
942 pr_err("read of pba %d, page %d failed with error %d",
943 pba, page, error);
944 return error;
945}
946
947
948static int msb_read_oob(struct msb_data *msb, u16 pba, u16 page,
949 struct ms_extra_data_register *extra)
950{
951 int error;
952
953 BUG_ON(!extra);
954 msb->regs.param.block_address = cpu_to_be16(pba);
955 msb->regs.param.page_address = page;
956 msb->regs.param.cp = MEMSTICK_CP_EXTRA;
957
958 if (pba > msb->block_count) {
959 pr_err("BUG: attempt to read beyond the end of card at pba %d", pba);
960 return -EINVAL;
961 }
962
963 error = msb_run_state_machine(msb, h_msb_read_page);
964 *extra = msb->regs.extra_data;
965
966 if (error == -EUCLEAN) {
967 pr_notice("correctable error on pba %d, page %d",
968 pba, page);
969 return 0;
970 }
971
972 return error;
973}
974
975
976static int msb_verify_block(struct msb_data *msb, u16 pba,
977 struct scatterlist *orig_sg, int offset)
978{
979 struct scatterlist sg;
980 int page = 0, error;
981
982 sg_init_one(&sg, msb->block_buffer, msb->block_size);
983
984 while (page < msb->pages_in_block) {
985
986 error = msb_read_page(msb, pba, page,
987 NULL, &sg, page * msb->page_size);
988 if (error)
989 return error;
990 page++;
991 }
992
993 if (msb_sg_compare_to_buffer(orig_sg, offset,
994 msb->block_buffer, msb->block_size))
995 return -EIO;
996 return 0;
997}
998
999
1000static int msb_write_block(struct msb_data *msb,
1001 u16 pba, u32 lba, struct scatterlist *sg, int offset)
1002{
1003 int error, current_try = 1;
1004
1005 BUG_ON(sg->length < msb->page_size);
1006
1007 if (msb->read_only)
1008 return -EROFS;
1009
1010 if (pba == MS_BLOCK_INVALID) {
1011 pr_err(
1012 "BUG: write: attempt to write MS_BLOCK_INVALID block");
1013 return -EINVAL;
1014 }
1015
1016 if (pba >= msb->block_count || lba >= msb->logical_block_count) {
1017 pr_err(
1018 "BUG: write: attempt to write beyond the end of device");
1019 return -EINVAL;
1020 }
1021
1022 if (msb_get_zone_from_lba(lba) != msb_get_zone_from_pba(pba)) {
1023 pr_err("BUG: write: lba zone mismatch");
1024 return -EINVAL;
1025 }
1026
1027 if (pba == msb->boot_block_locations[0] ||
1028 pba == msb->boot_block_locations[1]) {
1029 pr_err("BUG: write: attempt to write to boot blocks!");
1030 return -EINVAL;
1031 }
1032
1033 while (1) {
1034
1035 if (msb->read_only)
1036 return -EROFS;
1037
1038 msb->regs.param.cp = MEMSTICK_CP_BLOCK;
1039 msb->regs.param.page_address = 0;
1040 msb->regs.param.block_address = cpu_to_be16(pba);
1041
1042 msb->regs.extra_data.management_flag = 0xFF;
1043 msb->regs.extra_data.overwrite_flag = 0xF8;
1044 msb->regs.extra_data.logical_address = cpu_to_be16(lba);
1045
1046 msb->current_sg = sg;
1047 msb->current_sg_offset = offset;
1048 msb->current_page = 0;
1049
1050 error = msb_run_state_machine(msb, h_msb_write_block);
1051
1052
1053
1054
1055
1056
1057
1058
1059 if (!error && (verify_writes ||
1060 !test_bit(pba, msb->erased_blocks_bitmap)))
1061 error = msb_verify_block(msb, pba, sg, offset);
1062
1063 if (!error)
1064 break;
1065
1066 if (current_try > 1 || msb_reset(msb, true))
1067 break;
1068
1069 pr_err("write failed, trying to erase the pba %d", pba);
1070 error = msb_erase_block(msb, pba);
1071 if (error)
1072 break;
1073
1074 current_try++;
1075 }
1076 return error;
1077}
1078
1079
1080static u16 msb_get_free_block(struct msb_data *msb, int zone)
1081{
1082 u16 pos;
1083 int pba = zone * MS_BLOCKS_IN_ZONE;
1084 int i;
1085
1086 get_random_bytes(&pos, sizeof(pos));
1087
1088 if (!msb->free_block_count[zone]) {
1089 pr_err("NO free blocks in the zone %d, to use for a write, (media is WORN out) switching to RO mode", zone);
1090 msb->read_only = true;
1091 return MS_BLOCK_INVALID;
1092 }
1093
1094 pos %= msb->free_block_count[zone];
1095
1096 dbg_verbose("have %d choices for a free block, selected randomly: %d",
1097 msb->free_block_count[zone], pos);
1098
1099 pba = find_next_zero_bit(msb->used_blocks_bitmap,
1100 msb->block_count, pba);
1101 for (i = 0; i < pos; ++i)
1102 pba = find_next_zero_bit(msb->used_blocks_bitmap,
1103 msb->block_count, pba + 1);
1104
1105 dbg_verbose("result of the free blocks scan: pba %d", pba);
1106
1107 if (pba == msb->block_count || (msb_get_zone_from_pba(pba)) != zone) {
1108 pr_err("BUG: can't get a free block");
1109 msb->read_only = true;
1110 return MS_BLOCK_INVALID;
1111 }
1112
1113 msb_mark_block_used(msb, pba);
1114 return pba;
1115}
1116
1117static int msb_update_block(struct msb_data *msb, u16 lba,
1118 struct scatterlist *sg, int offset)
1119{
1120 u16 pba, new_pba;
1121 int error, try;
1122
1123 pba = msb->lba_to_pba_table[lba];
1124 dbg_verbose("start of a block update at lba %d, pba %d", lba, pba);
1125
1126 if (pba != MS_BLOCK_INVALID) {
1127 dbg_verbose("setting the update flag on the block");
1128 msb_set_overwrite_flag(msb, pba, 0,
1129 0xFF & ~MEMSTICK_OVERWRITE_UDST);
1130 }
1131
1132 for (try = 0; try < 3; try++) {
1133 new_pba = msb_get_free_block(msb,
1134 msb_get_zone_from_lba(lba));
1135
1136 if (new_pba == MS_BLOCK_INVALID) {
1137 error = -EIO;
1138 goto out;
1139 }
1140
1141 dbg_verbose("block update: writing updated block to the pba %d",
1142 new_pba);
1143 error = msb_write_block(msb, new_pba, lba, sg, offset);
1144 if (error == -EBADMSG) {
1145 msb_mark_bad(msb, new_pba);
1146 continue;
1147 }
1148
1149 if (error)
1150 goto out;
1151
1152 dbg_verbose("block update: erasing the old block");
1153 msb_erase_block(msb, pba);
1154 msb->lba_to_pba_table[lba] = new_pba;
1155 return 0;
1156 }
1157out:
1158 if (error) {
1159 pr_err("block update error after %d tries, switching to r/o mode", try);
1160 msb->read_only = true;
1161 }
1162 return error;
1163}
1164
1165
1166static void msb_fix_boot_page_endianness(struct ms_boot_page *p)
1167{
1168 p->header.block_id = be16_to_cpu(p->header.block_id);
1169 p->header.format_reserved = be16_to_cpu(p->header.format_reserved);
1170 p->entry.disabled_block.start_addr
1171 = be32_to_cpu(p->entry.disabled_block.start_addr);
1172 p->entry.disabled_block.data_size
1173 = be32_to_cpu(p->entry.disabled_block.data_size);
1174 p->entry.cis_idi.start_addr
1175 = be32_to_cpu(p->entry.cis_idi.start_addr);
1176 p->entry.cis_idi.data_size
1177 = be32_to_cpu(p->entry.cis_idi.data_size);
1178 p->attr.block_size = be16_to_cpu(p->attr.block_size);
1179 p->attr.number_of_blocks = be16_to_cpu(p->attr.number_of_blocks);
1180 p->attr.number_of_effective_blocks
1181 = be16_to_cpu(p->attr.number_of_effective_blocks);
1182 p->attr.page_size = be16_to_cpu(p->attr.page_size);
1183 p->attr.memory_manufacturer_code
1184 = be16_to_cpu(p->attr.memory_manufacturer_code);
1185 p->attr.memory_device_code = be16_to_cpu(p->attr.memory_device_code);
1186 p->attr.implemented_capacity
1187 = be16_to_cpu(p->attr.implemented_capacity);
1188 p->attr.controller_number = be16_to_cpu(p->attr.controller_number);
1189 p->attr.controller_function = be16_to_cpu(p->attr.controller_function);
1190}
1191
1192static int msb_read_boot_blocks(struct msb_data *msb)
1193{
1194 int pba = 0;
1195 struct scatterlist sg;
1196 struct ms_extra_data_register extra;
1197 struct ms_boot_page *page;
1198
1199 msb->boot_block_locations[0] = MS_BLOCK_INVALID;
1200 msb->boot_block_locations[1] = MS_BLOCK_INVALID;
1201 msb->boot_block_count = 0;
1202
1203 dbg_verbose("Start of a scan for the boot blocks");
1204
1205 if (!msb->boot_page) {
1206 page = kmalloc_array(2, sizeof(struct ms_boot_page),
1207 GFP_KERNEL);
1208 if (!page)
1209 return -ENOMEM;
1210
1211 msb->boot_page = page;
1212 } else
1213 page = msb->boot_page;
1214
1215 msb->block_count = MS_BLOCK_MAX_BOOT_ADDR;
1216
1217 for (pba = 0; pba < MS_BLOCK_MAX_BOOT_ADDR; pba++) {
1218
1219 sg_init_one(&sg, page, sizeof(*page));
1220 if (msb_read_page(msb, pba, 0, &extra, &sg, 0)) {
1221 dbg("boot scan: can't read pba %d", pba);
1222 continue;
1223 }
1224
1225 if (extra.management_flag & MEMSTICK_MANAGEMENT_SYSFLG) {
1226 dbg("management flag doesn't indicate boot block %d",
1227 pba);
1228 continue;
1229 }
1230
1231 if (be16_to_cpu(page->header.block_id) != MS_BLOCK_BOOT_ID) {
1232 dbg("the pba at %d doesn't contain boot block ID", pba);
1233 continue;
1234 }
1235
1236 msb_fix_boot_page_endianness(page);
1237 msb->boot_block_locations[msb->boot_block_count] = pba;
1238
1239 page++;
1240 msb->boot_block_count++;
1241
1242 if (msb->boot_block_count == 2)
1243 break;
1244 }
1245
1246 if (!msb->boot_block_count) {
1247 pr_err("media doesn't contain master page, aborting");
1248 return -EIO;
1249 }
1250
1251 dbg_verbose("End of scan for boot blocks");
1252 return 0;
1253}
1254
1255static int msb_read_bad_block_table(struct msb_data *msb, int block_nr)
1256{
1257 struct ms_boot_page *boot_block;
1258 struct scatterlist sg;
1259 u16 *buffer = NULL;
1260 int offset = 0;
1261 int i, error = 0;
1262 int data_size, data_offset, page, page_offset, size_to_read;
1263 u16 pba;
1264
1265 BUG_ON(block_nr > 1);
1266 boot_block = &msb->boot_page[block_nr];
1267 pba = msb->boot_block_locations[block_nr];
1268
1269 if (msb->boot_block_locations[block_nr] == MS_BLOCK_INVALID)
1270 return -EINVAL;
1271
1272 data_size = boot_block->entry.disabled_block.data_size;
1273 data_offset = sizeof(struct ms_boot_page) +
1274 boot_block->entry.disabled_block.start_addr;
1275 if (!data_size)
1276 return 0;
1277
1278 page = data_offset / msb->page_size;
1279 page_offset = data_offset % msb->page_size;
1280 size_to_read =
1281 DIV_ROUND_UP(data_size + page_offset, msb->page_size) *
1282 msb->page_size;
1283
1284 dbg("reading bad block of boot block at pba %d, offset %d len %d",
1285 pba, data_offset, data_size);
1286
1287 buffer = kzalloc(size_to_read, GFP_KERNEL);
1288 if (!buffer)
1289 return -ENOMEM;
1290
1291
1292 sg_init_one(&sg, buffer, size_to_read);
1293
1294 while (offset < size_to_read) {
1295 error = msb_read_page(msb, pba, page, NULL, &sg, offset);
1296 if (error)
1297 goto out;
1298
1299 page++;
1300 offset += msb->page_size;
1301
1302 if (page == msb->pages_in_block) {
1303 pr_err(
1304 "bad block table extends beyond the boot block");
1305 break;
1306 }
1307 }
1308
1309
1310 for (i = page_offset; i < data_size / sizeof(u16); i++) {
1311
1312 u16 bad_block = be16_to_cpu(buffer[i]);
1313
1314 if (bad_block >= msb->block_count) {
1315 dbg("bad block table contains invalid block %d",
1316 bad_block);
1317 continue;
1318 }
1319
1320 if (test_bit(bad_block, msb->used_blocks_bitmap)) {
1321 dbg("duplicate bad block %d in the table",
1322 bad_block);
1323 continue;
1324 }
1325
1326 dbg("block %d is marked as factory bad", bad_block);
1327 msb_mark_block_used(msb, bad_block);
1328 }
1329out:
1330 kfree(buffer);
1331 return error;
1332}
1333
1334static int msb_ftl_initialize(struct msb_data *msb)
1335{
1336 int i;
1337
1338 if (msb->ftl_initialized)
1339 return 0;
1340
1341 msb->zone_count = msb->block_count / MS_BLOCKS_IN_ZONE;
1342 msb->logical_block_count = msb->zone_count * 496 - 2;
1343
1344 msb->used_blocks_bitmap = kzalloc(msb->block_count / 8, GFP_KERNEL);
1345 msb->erased_blocks_bitmap = kzalloc(msb->block_count / 8, GFP_KERNEL);
1346 msb->lba_to_pba_table =
1347 kmalloc_array(msb->logical_block_count, sizeof(u16),
1348 GFP_KERNEL);
1349
1350 if (!msb->used_blocks_bitmap || !msb->lba_to_pba_table ||
1351 !msb->erased_blocks_bitmap) {
1352 kfree(msb->used_blocks_bitmap);
1353 kfree(msb->lba_to_pba_table);
1354 kfree(msb->erased_blocks_bitmap);
1355 return -ENOMEM;
1356 }
1357
1358 for (i = 0; i < msb->zone_count; i++)
1359 msb->free_block_count[i] = MS_BLOCKS_IN_ZONE;
1360
1361 memset(msb->lba_to_pba_table, MS_BLOCK_INVALID,
1362 msb->logical_block_count * sizeof(u16));
1363
1364 dbg("initial FTL tables created. Zone count = %d, Logical block count = %d",
1365 msb->zone_count, msb->logical_block_count);
1366
1367 msb->ftl_initialized = true;
1368 return 0;
1369}
1370
1371static int msb_ftl_scan(struct msb_data *msb)
1372{
1373 u16 pba, lba, other_block;
1374 u8 overwrite_flag, management_flag, other_overwrite_flag;
1375 int error;
1376 struct ms_extra_data_register extra;
1377 u8 *overwrite_flags = kzalloc(msb->block_count, GFP_KERNEL);
1378
1379 if (!overwrite_flags)
1380 return -ENOMEM;
1381
1382 dbg("Start of media scanning");
1383 for (pba = 0; pba < msb->block_count; pba++) {
1384
1385 if (pba == msb->boot_block_locations[0] ||
1386 pba == msb->boot_block_locations[1]) {
1387 dbg_verbose("pba %05d -> [boot block]", pba);
1388 msb_mark_block_used(msb, pba);
1389 continue;
1390 }
1391
1392 if (test_bit(pba, msb->used_blocks_bitmap)) {
1393 dbg_verbose("pba %05d -> [factory bad]", pba);
1394 continue;
1395 }
1396
1397 memset(&extra, 0, sizeof(extra));
1398 error = msb_read_oob(msb, pba, 0, &extra);
1399
1400
1401 if (error == -EBADMSG) {
1402 pr_notice(
1403 "oob of pba %d damaged, will try to erase it", pba);
1404 msb_mark_block_used(msb, pba);
1405 msb_erase_block(msb, pba);
1406 continue;
1407 } else if (error) {
1408 pr_err("unknown error %d on read of oob of pba %d - aborting",
1409 error, pba);
1410
1411 kfree(overwrite_flags);
1412 return error;
1413 }
1414
1415 lba = be16_to_cpu(extra.logical_address);
1416 management_flag = extra.management_flag;
1417 overwrite_flag = extra.overwrite_flag;
1418 overwrite_flags[pba] = overwrite_flag;
1419
1420
1421 if (!(overwrite_flag & MEMSTICK_OVERWRITE_BKST)) {
1422 dbg("pba %05d -> [BAD]", pba);
1423 msb_mark_block_used(msb, pba);
1424 continue;
1425 }
1426
1427
1428 if ((management_flag & MEMSTICK_MANAGEMENT_FLAG_NORMAL) !=
1429 MEMSTICK_MANAGEMENT_FLAG_NORMAL) {
1430 dbg("pba %05d -> [reserved management flag %02x]",
1431 pba, management_flag);
1432 msb_mark_block_used(msb, pba);
1433 continue;
1434 }
1435
1436
1437 if (!(management_flag & MEMSTICK_MANAGEMENT_ATFLG)) {
1438 dbg("pba %05d -> [temp table] - will erase", pba);
1439
1440 msb_mark_block_used(msb, pba);
1441 msb_erase_block(msb, pba);
1442 continue;
1443 }
1444
1445 if (lba == MS_BLOCK_INVALID) {
1446 dbg_verbose("pba %05d -> [free]", pba);
1447 continue;
1448 }
1449
1450 msb_mark_block_used(msb, pba);
1451
1452
1453 if (msb_get_zone_from_lba(lba) != msb_get_zone_from_pba(pba)) {
1454 pr_notice("pba %05d -> [bad lba %05d] - will erase",
1455 pba, lba);
1456 msb_erase_block(msb, pba);
1457 continue;
1458 }
1459
1460
1461 if (msb->lba_to_pba_table[lba] == MS_BLOCK_INVALID) {
1462 dbg_verbose("pba %05d -> [lba %05d]", pba, lba);
1463 msb->lba_to_pba_table[lba] = pba;
1464 continue;
1465 }
1466
1467 other_block = msb->lba_to_pba_table[lba];
1468 other_overwrite_flag = overwrite_flags[other_block];
1469
1470 pr_notice("Collision between pba %d and pba %d",
1471 pba, other_block);
1472
1473 if (!(overwrite_flag & MEMSTICK_OVERWRITE_UDST)) {
1474 pr_notice("pba %d is marked as stable, use it", pba);
1475 msb_erase_block(msb, other_block);
1476 msb->lba_to_pba_table[lba] = pba;
1477 continue;
1478 }
1479
1480 if (!(other_overwrite_flag & MEMSTICK_OVERWRITE_UDST)) {
1481 pr_notice("pba %d is marked as stable, use it",
1482 other_block);
1483 msb_erase_block(msb, pba);
1484 continue;
1485 }
1486
1487 pr_notice("collision between blocks %d and %d, without stable flag set on both, erasing pba %d",
1488 pba, other_block, other_block);
1489
1490 msb_erase_block(msb, other_block);
1491 msb->lba_to_pba_table[lba] = pba;
1492 }
1493
1494 dbg("End of media scanning");
1495 kfree(overwrite_flags);
1496 return 0;
1497}
1498
1499static void msb_cache_flush_timer(struct timer_list *t)
1500{
1501 struct msb_data *msb = from_timer(msb, t, cache_flush_timer);
1502
1503 msb->need_flush_cache = true;
1504 queue_work(msb->io_queue, &msb->io_work);
1505}
1506
1507
1508static void msb_cache_discard(struct msb_data *msb)
1509{
1510 if (msb->cache_block_lba == MS_BLOCK_INVALID)
1511 return;
1512
1513 del_timer_sync(&msb->cache_flush_timer);
1514
1515 dbg_verbose("Discarding the write cache");
1516 msb->cache_block_lba = MS_BLOCK_INVALID;
1517 bitmap_zero(&msb->valid_cache_bitmap, msb->pages_in_block);
1518}
1519
1520static int msb_cache_init(struct msb_data *msb)
1521{
1522 timer_setup(&msb->cache_flush_timer, msb_cache_flush_timer, 0);
1523
1524 if (!msb->cache)
1525 msb->cache = kzalloc(msb->block_size, GFP_KERNEL);
1526 if (!msb->cache)
1527 return -ENOMEM;
1528
1529 msb_cache_discard(msb);
1530 return 0;
1531}
1532
1533static int msb_cache_flush(struct msb_data *msb)
1534{
1535 struct scatterlist sg;
1536 struct ms_extra_data_register extra;
1537 int page, offset, error;
1538 u16 pba, lba;
1539
1540 if (msb->read_only)
1541 return -EROFS;
1542
1543 if (msb->cache_block_lba == MS_BLOCK_INVALID)
1544 return 0;
1545
1546 lba = msb->cache_block_lba;
1547 pba = msb->lba_to_pba_table[lba];
1548
1549 dbg_verbose("Flushing the write cache of pba %d (LBA %d)",
1550 pba, msb->cache_block_lba);
1551
1552 sg_init_one(&sg, msb->cache , msb->block_size);
1553
1554
1555 for (page = 0; page < msb->pages_in_block; page++) {
1556
1557 if (test_bit(page, &msb->valid_cache_bitmap))
1558 continue;
1559
1560 offset = page * msb->page_size;
1561
1562 dbg_verbose("reading non-present sector %d of cache block %d",
1563 page, lba);
1564 error = msb_read_page(msb, pba, page, &extra, &sg, offset);
1565
1566
1567 if (error == -EBADMSG) {
1568 pr_err("read error on sector %d, contents probably damaged", page);
1569 continue;
1570 }
1571
1572 if (error)
1573 return error;
1574
1575 if ((extra.overwrite_flag & MEMSTICK_OV_PG_NORMAL) !=
1576 MEMSTICK_OV_PG_NORMAL) {
1577 dbg("page %d is marked as bad", page);
1578 continue;
1579 }
1580
1581 set_bit(page, &msb->valid_cache_bitmap);
1582 }
1583
1584
1585 error = msb_update_block(msb, msb->cache_block_lba, &sg, 0);
1586 pba = msb->lba_to_pba_table[msb->cache_block_lba];
1587
1588
1589 if (!error) {
1590 for (page = 0; page < msb->pages_in_block; page++) {
1591
1592 if (test_bit(page, &msb->valid_cache_bitmap))
1593 continue;
1594
1595 dbg("marking page %d as containing damaged data",
1596 page);
1597 msb_set_overwrite_flag(msb,
1598 pba , page, 0xFF & ~MEMSTICK_OV_PG_NORMAL);
1599 }
1600 }
1601
1602 msb_cache_discard(msb);
1603 return error;
1604}
1605
1606static int msb_cache_write(struct msb_data *msb, int lba,
1607 int page, bool add_to_cache_only, struct scatterlist *sg, int offset)
1608{
1609 int error;
1610 struct scatterlist sg_tmp[10];
1611
1612 if (msb->read_only)
1613 return -EROFS;
1614
1615 if (msb->cache_block_lba == MS_BLOCK_INVALID ||
1616 lba != msb->cache_block_lba)
1617 if (add_to_cache_only)
1618 return 0;
1619
1620
1621 if (msb->cache_block_lba != MS_BLOCK_INVALID &&
1622 lba != msb->cache_block_lba) {
1623 dbg_verbose("first flush the cache");
1624 error = msb_cache_flush(msb);
1625 if (error)
1626 return error;
1627 }
1628
1629 if (msb->cache_block_lba == MS_BLOCK_INVALID) {
1630 msb->cache_block_lba = lba;
1631 mod_timer(&msb->cache_flush_timer,
1632 jiffies + msecs_to_jiffies(cache_flush_timeout));
1633 }
1634
1635 dbg_verbose("Write of LBA %d page %d to cache ", lba, page);
1636
1637 sg_init_table(sg_tmp, ARRAY_SIZE(sg_tmp));
1638 msb_sg_copy(sg, sg_tmp, ARRAY_SIZE(sg_tmp), offset, msb->page_size);
1639
1640 sg_copy_to_buffer(sg_tmp, sg_nents(sg_tmp),
1641 msb->cache + page * msb->page_size, msb->page_size);
1642
1643 set_bit(page, &msb->valid_cache_bitmap);
1644 return 0;
1645}
1646
1647static int msb_cache_read(struct msb_data *msb, int lba,
1648 int page, struct scatterlist *sg, int offset)
1649{
1650 int pba = msb->lba_to_pba_table[lba];
1651 struct scatterlist sg_tmp[10];
1652 int error = 0;
1653
1654 if (lba == msb->cache_block_lba &&
1655 test_bit(page, &msb->valid_cache_bitmap)) {
1656
1657 dbg_verbose("Read of LBA %d (pba %d) sector %d from cache",
1658 lba, pba, page);
1659
1660 sg_init_table(sg_tmp, ARRAY_SIZE(sg_tmp));
1661 msb_sg_copy(sg, sg_tmp, ARRAY_SIZE(sg_tmp),
1662 offset, msb->page_size);
1663 sg_copy_from_buffer(sg_tmp, sg_nents(sg_tmp),
1664 msb->cache + msb->page_size * page,
1665 msb->page_size);
1666 } else {
1667 dbg_verbose("Read of LBA %d (pba %d) sector %d from device",
1668 lba, pba, page);
1669
1670 error = msb_read_page(msb, pba, page, NULL, sg, offset);
1671 if (error)
1672 return error;
1673
1674 msb_cache_write(msb, lba, page, true, sg, offset);
1675 }
1676 return error;
1677}
1678
1679
1680
1681
1682
1683
1684
1685
1686static const struct chs_entry chs_table[] = {
1687
1688 { 4, 16, 247, 2 },
1689 { 8, 16, 495, 2 },
1690 { 16, 16, 495, 4 },
1691 { 32, 16, 991, 4 },
1692 { 64, 16, 991, 8 },
1693 {128, 16, 991, 16 },
1694 { 0 }
1695};
1696
1697
1698static int msb_init_card(struct memstick_dev *card)
1699{
1700 struct msb_data *msb = memstick_get_drvdata(card);
1701 struct memstick_host *host = card->host;
1702 struct ms_boot_page *boot_block;
1703 int error = 0, i, raw_size_in_megs;
1704
1705 msb->caps = 0;
1706
1707 if (card->id.class >= MEMSTICK_CLASS_ROM &&
1708 card->id.class <= MEMSTICK_CLASS_ROM)
1709 msb->read_only = true;
1710
1711 msb->state = -1;
1712 error = msb_reset(msb, false);
1713 if (error)
1714 return error;
1715
1716
1717
1718
1719
1720 if (host->caps & MEMSTICK_CAP_PAR4)
1721 msb_switch_to_parallel(msb);
1722
1723 msb->page_size = sizeof(struct ms_boot_page);
1724
1725
1726 error = msb_read_boot_blocks(msb);
1727 if (error)
1728 return -EIO;
1729
1730 boot_block = &msb->boot_page[0];
1731
1732
1733 msb->block_count = boot_block->attr.number_of_blocks;
1734 msb->page_size = boot_block->attr.page_size;
1735
1736 msb->pages_in_block = boot_block->attr.block_size * 2;
1737 msb->block_size = msb->page_size * msb->pages_in_block;
1738
1739 if (msb->page_size > PAGE_SIZE) {
1740
1741 dbg("device page %d size isn't supported", msb->page_size);
1742 return -EINVAL;
1743 }
1744
1745 msb->block_buffer = kzalloc(msb->block_size, GFP_KERNEL);
1746 if (!msb->block_buffer)
1747 return -ENOMEM;
1748
1749 raw_size_in_megs = (msb->block_size * msb->block_count) >> 20;
1750
1751 for (i = 0; chs_table[i].size; i++) {
1752
1753 if (chs_table[i].size != raw_size_in_megs)
1754 continue;
1755
1756 msb->geometry.cylinders = chs_table[i].cyl;
1757 msb->geometry.heads = chs_table[i].head;
1758 msb->geometry.sectors = chs_table[i].sec;
1759 break;
1760 }
1761
1762 if (boot_block->attr.transfer_supporting == 1)
1763 msb->caps |= MEMSTICK_CAP_PAR4;
1764
1765 if (boot_block->attr.device_type & 0x03)
1766 msb->read_only = true;
1767
1768 dbg("Total block count = %d", msb->block_count);
1769 dbg("Each block consists of %d pages", msb->pages_in_block);
1770 dbg("Page size = %d bytes", msb->page_size);
1771 dbg("Parallel mode supported: %d", !!(msb->caps & MEMSTICK_CAP_PAR4));
1772 dbg("Read only: %d", msb->read_only);
1773
1774#if 0
1775
1776 if (host->caps & msb->caps & MEMSTICK_CAP_PAR4)
1777 msb_switch_to_parallel(msb);
1778#endif
1779
1780 error = msb_cache_init(msb);
1781 if (error)
1782 return error;
1783
1784 error = msb_ftl_initialize(msb);
1785 if (error)
1786 return error;
1787
1788
1789
1790 error = msb_read_bad_block_table(msb, 0);
1791
1792 if (error && error != -ENOMEM) {
1793 dbg("failed to read bad block table from primary boot block, trying from backup");
1794 error = msb_read_bad_block_table(msb, 1);
1795 }
1796
1797 if (error)
1798 return error;
1799
1800
1801 error = msb_ftl_scan(msb);
1802 if (error) {
1803 pr_err("Scan of media failed");
1804 return error;
1805 }
1806
1807 return 0;
1808
1809}
1810
1811static int msb_do_write_request(struct msb_data *msb, int lba,
1812 int page, struct scatterlist *sg, size_t len, int *sucessfuly_written)
1813{
1814 int error = 0;
1815 off_t offset = 0;
1816 *sucessfuly_written = 0;
1817
1818 while (offset < len) {
1819 if (page == 0 && len - offset >= msb->block_size) {
1820
1821 if (msb->cache_block_lba == lba)
1822 msb_cache_discard(msb);
1823
1824 dbg_verbose("Writing whole lba %d", lba);
1825 error = msb_update_block(msb, lba, sg, offset);
1826 if (error)
1827 return error;
1828
1829 offset += msb->block_size;
1830 *sucessfuly_written += msb->block_size;
1831 lba++;
1832 continue;
1833 }
1834
1835 error = msb_cache_write(msb, lba, page, false, sg, offset);
1836 if (error)
1837 return error;
1838
1839 offset += msb->page_size;
1840 *sucessfuly_written += msb->page_size;
1841
1842 page++;
1843 if (page == msb->pages_in_block) {
1844 page = 0;
1845 lba++;
1846 }
1847 }
1848 return 0;
1849}
1850
1851static int msb_do_read_request(struct msb_data *msb, int lba,
1852 int page, struct scatterlist *sg, int len, int *sucessfuly_read)
1853{
1854 int error = 0;
1855 int offset = 0;
1856 *sucessfuly_read = 0;
1857
1858 while (offset < len) {
1859
1860 error = msb_cache_read(msb, lba, page, sg, offset);
1861 if (error)
1862 return error;
1863
1864 offset += msb->page_size;
1865 *sucessfuly_read += msb->page_size;
1866
1867 page++;
1868 if (page == msb->pages_in_block) {
1869 page = 0;
1870 lba++;
1871 }
1872 }
1873 return 0;
1874}
1875
1876static void msb_io_work(struct work_struct *work)
1877{
1878 struct msb_data *msb = container_of(work, struct msb_data, io_work);
1879 int page, error, len;
1880 sector_t lba;
1881 struct scatterlist *sg = msb->prealloc_sg;
1882 struct request *req;
1883
1884 dbg_verbose("IO: work started");
1885
1886 while (1) {
1887 spin_lock_irq(&msb->q_lock);
1888
1889 if (msb->need_flush_cache) {
1890 msb->need_flush_cache = false;
1891 spin_unlock_irq(&msb->q_lock);
1892 msb_cache_flush(msb);
1893 continue;
1894 }
1895
1896 req = msb->req;
1897 if (!req) {
1898 dbg_verbose("IO: no more requests exiting");
1899 spin_unlock_irq(&msb->q_lock);
1900 return;
1901 }
1902
1903 spin_unlock_irq(&msb->q_lock);
1904
1905
1906 dbg_verbose("IO: processing new request");
1907 blk_rq_map_sg(msb->queue, req, sg);
1908
1909 lba = blk_rq_pos(req);
1910
1911 sector_div(lba, msb->page_size / 512);
1912 page = sector_div(lba, msb->pages_in_block);
1913
1914 if (rq_data_dir(msb->req) == READ)
1915 error = msb_do_read_request(msb, lba, page, sg,
1916 blk_rq_bytes(req), &len);
1917 else
1918 error = msb_do_write_request(msb, lba, page, sg,
1919 blk_rq_bytes(req), &len);
1920
1921 if (len && !blk_update_request(req, BLK_STS_OK, len)) {
1922 __blk_mq_end_request(req, BLK_STS_OK);
1923 spin_lock_irq(&msb->q_lock);
1924 msb->req = NULL;
1925 spin_unlock_irq(&msb->q_lock);
1926 }
1927
1928 if (error && msb->req) {
1929 blk_status_t ret = errno_to_blk_status(error);
1930
1931 dbg_verbose("IO: ending one sector of the request with error");
1932 blk_mq_end_request(req, ret);
1933 spin_lock_irq(&msb->q_lock);
1934 msb->req = NULL;
1935 spin_unlock_irq(&msb->q_lock);
1936 }
1937
1938 if (msb->req)
1939 dbg_verbose("IO: request still pending");
1940 }
1941}
1942
1943static DEFINE_IDR(msb_disk_idr);
1944static DEFINE_MUTEX(msb_disk_lock);
1945
1946static int msb_bd_open(struct block_device *bdev, fmode_t mode)
1947{
1948 struct gendisk *disk = bdev->bd_disk;
1949 struct msb_data *msb = disk->private_data;
1950
1951 dbg_verbose("block device open");
1952
1953 mutex_lock(&msb_disk_lock);
1954
1955 if (msb && msb->card)
1956 msb->usage_count++;
1957
1958 mutex_unlock(&msb_disk_lock);
1959 return 0;
1960}
1961
1962static void msb_data_clear(struct msb_data *msb)
1963{
1964 kfree(msb->boot_page);
1965 kfree(msb->used_blocks_bitmap);
1966 kfree(msb->lba_to_pba_table);
1967 kfree(msb->cache);
1968 msb->card = NULL;
1969}
1970
1971static int msb_disk_release(struct gendisk *disk)
1972{
1973 struct msb_data *msb = disk->private_data;
1974
1975 dbg_verbose("block device release");
1976 mutex_lock(&msb_disk_lock);
1977
1978 if (msb) {
1979 if (msb->usage_count)
1980 msb->usage_count--;
1981
1982 if (!msb->usage_count) {
1983 disk->private_data = NULL;
1984 idr_remove(&msb_disk_idr, msb->disk_id);
1985 put_disk(disk);
1986 kfree(msb);
1987 }
1988 }
1989 mutex_unlock(&msb_disk_lock);
1990 return 0;
1991}
1992
1993static void msb_bd_release(struct gendisk *disk, fmode_t mode)
1994{
1995 msb_disk_release(disk);
1996}
1997
1998static int msb_bd_getgeo(struct block_device *bdev,
1999 struct hd_geometry *geo)
2000{
2001 struct msb_data *msb = bdev->bd_disk->private_data;
2002 *geo = msb->geometry;
2003 return 0;
2004}
2005
2006static blk_status_t msb_queue_rq(struct blk_mq_hw_ctx *hctx,
2007 const struct blk_mq_queue_data *bd)
2008{
2009 struct memstick_dev *card = hctx->queue->queuedata;
2010 struct msb_data *msb = memstick_get_drvdata(card);
2011 struct request *req = bd->rq;
2012
2013 dbg_verbose("Submit request");
2014
2015 spin_lock_irq(&msb->q_lock);
2016
2017 if (msb->card_dead) {
2018 dbg("Refusing requests on removed card");
2019
2020 WARN_ON(!msb->io_queue_stopped);
2021
2022 spin_unlock_irq(&msb->q_lock);
2023 blk_mq_start_request(req);
2024 return BLK_STS_IOERR;
2025 }
2026
2027 if (msb->req) {
2028 spin_unlock_irq(&msb->q_lock);
2029 return BLK_STS_DEV_RESOURCE;
2030 }
2031
2032 blk_mq_start_request(req);
2033 msb->req = req;
2034
2035 if (!msb->io_queue_stopped)
2036 queue_work(msb->io_queue, &msb->io_work);
2037
2038 spin_unlock_irq(&msb->q_lock);
2039 return BLK_STS_OK;
2040}
2041
2042static int msb_check_card(struct memstick_dev *card)
2043{
2044 struct msb_data *msb = memstick_get_drvdata(card);
2045
2046 return (msb->card_dead == 0);
2047}
2048
2049static void msb_stop(struct memstick_dev *card)
2050{
2051 struct msb_data *msb = memstick_get_drvdata(card);
2052 unsigned long flags;
2053
2054 dbg("Stopping all msblock IO");
2055
2056 blk_mq_stop_hw_queues(msb->queue);
2057 spin_lock_irqsave(&msb->q_lock, flags);
2058 msb->io_queue_stopped = true;
2059 spin_unlock_irqrestore(&msb->q_lock, flags);
2060
2061 del_timer_sync(&msb->cache_flush_timer);
2062 flush_workqueue(msb->io_queue);
2063
2064 spin_lock_irqsave(&msb->q_lock, flags);
2065 if (msb->req) {
2066 blk_mq_requeue_request(msb->req, false);
2067 msb->req = NULL;
2068 }
2069 spin_unlock_irqrestore(&msb->q_lock, flags);
2070}
2071
2072static void msb_start(struct memstick_dev *card)
2073{
2074 struct msb_data *msb = memstick_get_drvdata(card);
2075 unsigned long flags;
2076
2077 dbg("Resuming IO from msblock");
2078
2079 msb_invalidate_reg_window(msb);
2080
2081 spin_lock_irqsave(&msb->q_lock, flags);
2082 if (!msb->io_queue_stopped || msb->card_dead) {
2083 spin_unlock_irqrestore(&msb->q_lock, flags);
2084 return;
2085 }
2086 spin_unlock_irqrestore(&msb->q_lock, flags);
2087
2088
2089 msb->need_flush_cache = true;
2090 msb->io_queue_stopped = false;
2091
2092 blk_mq_start_hw_queues(msb->queue);
2093
2094 queue_work(msb->io_queue, &msb->io_work);
2095
2096}
2097
2098static const struct block_device_operations msb_bdops = {
2099 .open = msb_bd_open,
2100 .release = msb_bd_release,
2101 .getgeo = msb_bd_getgeo,
2102 .owner = THIS_MODULE
2103};
2104
2105static const struct blk_mq_ops msb_mq_ops = {
2106 .queue_rq = msb_queue_rq,
2107};
2108
2109
2110static int msb_init_disk(struct memstick_dev *card)
2111{
2112 struct msb_data *msb = memstick_get_drvdata(card);
2113 int rc;
2114 unsigned long capacity;
2115
2116 mutex_lock(&msb_disk_lock);
2117 msb->disk_id = idr_alloc(&msb_disk_idr, card, 0, 256, GFP_KERNEL);
2118 mutex_unlock(&msb_disk_lock);
2119
2120 if (msb->disk_id < 0)
2121 return msb->disk_id;
2122
2123 rc = blk_mq_alloc_sq_tag_set(&msb->tag_set, &msb_mq_ops, 2,
2124 BLK_MQ_F_SHOULD_MERGE);
2125 if (rc)
2126 goto out_release_id;
2127
2128 msb->disk = blk_mq_alloc_disk(&msb->tag_set, card);
2129 if (IS_ERR(msb->disk)) {
2130 rc = PTR_ERR(msb->disk);
2131 goto out_free_tag_set;
2132 }
2133 msb->queue = msb->disk->queue;
2134
2135 blk_queue_max_hw_sectors(msb->queue, MS_BLOCK_MAX_PAGES);
2136 blk_queue_max_segments(msb->queue, MS_BLOCK_MAX_SEGS);
2137 blk_queue_max_segment_size(msb->queue,
2138 MS_BLOCK_MAX_PAGES * msb->page_size);
2139 blk_queue_logical_block_size(msb->queue, msb->page_size);
2140
2141 sprintf(msb->disk->disk_name, "msblk%d", msb->disk_id);
2142 msb->disk->fops = &msb_bdops;
2143 msb->disk->private_data = msb;
2144
2145 capacity = msb->pages_in_block * msb->logical_block_count;
2146 capacity *= (msb->page_size / 512);
2147 set_capacity(msb->disk, capacity);
2148 dbg("Set total disk size to %lu sectors", capacity);
2149
2150 msb->usage_count = 1;
2151 msb->io_queue = alloc_ordered_workqueue("ms_block", WQ_MEM_RECLAIM);
2152 INIT_WORK(&msb->io_work, msb_io_work);
2153 sg_init_table(msb->prealloc_sg, MS_BLOCK_MAX_SEGS+1);
2154
2155 if (msb->read_only)
2156 set_disk_ro(msb->disk, 1);
2157
2158 msb_start(card);
2159 device_add_disk(&card->dev, msb->disk, NULL);
2160 dbg("Disk added");
2161 return 0;
2162
2163out_free_tag_set:
2164 blk_mq_free_tag_set(&msb->tag_set);
2165out_release_id:
2166 mutex_lock(&msb_disk_lock);
2167 idr_remove(&msb_disk_idr, msb->disk_id);
2168 mutex_unlock(&msb_disk_lock);
2169 return rc;
2170}
2171
2172static int msb_probe(struct memstick_dev *card)
2173{
2174 struct msb_data *msb;
2175 int rc = 0;
2176
2177 msb = kzalloc(sizeof(struct msb_data), GFP_KERNEL);
2178 if (!msb)
2179 return -ENOMEM;
2180 memstick_set_drvdata(card, msb);
2181 msb->card = card;
2182 spin_lock_init(&msb->q_lock);
2183
2184 rc = msb_init_card(card);
2185 if (rc)
2186 goto out_free;
2187
2188 rc = msb_init_disk(card);
2189 if (!rc) {
2190 card->check = msb_check_card;
2191 card->stop = msb_stop;
2192 card->start = msb_start;
2193 return 0;
2194 }
2195out_free:
2196 memstick_set_drvdata(card, NULL);
2197 msb_data_clear(msb);
2198 kfree(msb);
2199 return rc;
2200}
2201
2202static void msb_remove(struct memstick_dev *card)
2203{
2204 struct msb_data *msb = memstick_get_drvdata(card);
2205 unsigned long flags;
2206
2207 if (!msb->io_queue_stopped)
2208 msb_stop(card);
2209
2210 dbg("Removing the disk device");
2211
2212
2213 spin_lock_irqsave(&msb->q_lock, flags);
2214 msb->card_dead = true;
2215 spin_unlock_irqrestore(&msb->q_lock, flags);
2216 blk_mq_start_hw_queues(msb->queue);
2217
2218
2219 del_gendisk(msb->disk);
2220 blk_cleanup_queue(msb->queue);
2221 blk_mq_free_tag_set(&msb->tag_set);
2222 msb->queue = NULL;
2223
2224 mutex_lock(&msb_disk_lock);
2225 msb_data_clear(msb);
2226 mutex_unlock(&msb_disk_lock);
2227
2228 msb_disk_release(msb->disk);
2229 memstick_set_drvdata(card, NULL);
2230}
2231
2232#ifdef CONFIG_PM
2233
2234static int msb_suspend(struct memstick_dev *card, pm_message_t state)
2235{
2236 msb_stop(card);
2237 return 0;
2238}
2239
2240static int msb_resume(struct memstick_dev *card)
2241{
2242 struct msb_data *msb = memstick_get_drvdata(card);
2243 struct msb_data *new_msb = NULL;
2244 bool card_dead = true;
2245
2246#ifndef CONFIG_MEMSTICK_UNSAFE_RESUME
2247 msb->card_dead = true;
2248 return 0;
2249#endif
2250 mutex_lock(&card->host->lock);
2251
2252 new_msb = kzalloc(sizeof(struct msb_data), GFP_KERNEL);
2253 if (!new_msb)
2254 goto out;
2255
2256 new_msb->card = card;
2257 memstick_set_drvdata(card, new_msb);
2258 spin_lock_init(&new_msb->q_lock);
2259 sg_init_table(msb->prealloc_sg, MS_BLOCK_MAX_SEGS+1);
2260
2261 if (msb_init_card(card))
2262 goto out;
2263
2264 if (msb->block_size != new_msb->block_size)
2265 goto out;
2266
2267 if (memcmp(msb->boot_page, new_msb->boot_page,
2268 sizeof(struct ms_boot_page)))
2269 goto out;
2270
2271 if (msb->logical_block_count != new_msb->logical_block_count ||
2272 memcmp(msb->lba_to_pba_table, new_msb->lba_to_pba_table,
2273 msb->logical_block_count))
2274 goto out;
2275
2276 if (msb->block_count != new_msb->block_count ||
2277 memcmp(msb->used_blocks_bitmap, new_msb->used_blocks_bitmap,
2278 msb->block_count / 8))
2279 goto out;
2280
2281 card_dead = false;
2282out:
2283 if (card_dead)
2284 dbg("Card was removed/replaced during suspend");
2285
2286 msb->card_dead = card_dead;
2287 memstick_set_drvdata(card, msb);
2288
2289 if (new_msb) {
2290 msb_data_clear(new_msb);
2291 kfree(new_msb);
2292 }
2293
2294 msb_start(card);
2295 mutex_unlock(&card->host->lock);
2296 return 0;
2297}
2298#else
2299
2300#define msb_suspend NULL
2301#define msb_resume NULL
2302
2303#endif
2304
2305static struct memstick_device_id msb_id_tbl[] = {
2306 {MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_LEGACY, MEMSTICK_CATEGORY_STORAGE,
2307 MEMSTICK_CLASS_FLASH},
2308
2309 {MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_LEGACY, MEMSTICK_CATEGORY_STORAGE,
2310 MEMSTICK_CLASS_ROM},
2311
2312 {MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_LEGACY, MEMSTICK_CATEGORY_STORAGE,
2313 MEMSTICK_CLASS_RO},
2314
2315 {MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_LEGACY, MEMSTICK_CATEGORY_STORAGE,
2316 MEMSTICK_CLASS_WP},
2317
2318 {MEMSTICK_MATCH_ALL, MEMSTICK_TYPE_DUO, MEMSTICK_CATEGORY_STORAGE_DUO,
2319 MEMSTICK_CLASS_DUO},
2320 {}
2321};
2322MODULE_DEVICE_TABLE(memstick, msb_id_tbl);
2323
2324
2325static struct memstick_driver msb_driver = {
2326 .driver = {
2327 .name = DRIVER_NAME,
2328 .owner = THIS_MODULE
2329 },
2330 .id_table = msb_id_tbl,
2331 .probe = msb_probe,
2332 .remove = msb_remove,
2333 .suspend = msb_suspend,
2334 .resume = msb_resume
2335};
2336
2337static int __init msb_init(void)
2338{
2339 int rc = memstick_register_driver(&msb_driver);
2340
2341 if (rc)
2342 pr_err("failed to register memstick driver (error %d)\n", rc);
2343
2344 return rc;
2345}
2346
2347static void __exit msb_exit(void)
2348{
2349 memstick_unregister_driver(&msb_driver);
2350 idr_destroy(&msb_disk_idr);
2351}
2352
2353module_init(msb_init);
2354module_exit(msb_exit);
2355
2356module_param(cache_flush_timeout, int, S_IRUGO);
2357MODULE_PARM_DESC(cache_flush_timeout,
2358 "Cache flush timeout in msec (1000 default)");
2359module_param(debug, int, S_IRUGO | S_IWUSR);
2360MODULE_PARM_DESC(debug, "Debug level (0-2)");
2361
2362module_param(verify_writes, bool, S_IRUGO);
2363MODULE_PARM_DESC(verify_writes, "Read back and check all data that is written");
2364
2365MODULE_LICENSE("GPL");
2366MODULE_AUTHOR("Maxim Levitsky");
2367MODULE_DESCRIPTION("Sony MemoryStick block device driver");
2368
