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dm thin metadata: fix __udivdi3 undefined on 32-bit
[linux/fpc-iii.git] / drivers / mmc / card / block.c
blobf2b733275a0a4a22b6ef0cd4b386237d0933c599
1 /*
2 * Block driver for media (i.e., flash cards)
3 *
4 * Copyright 2002 Hewlett-Packard Company
5 * Copyright 2005-2008 Pierre Ossman
6 *
7 * Use consistent with the GNU GPL is permitted,
8 * provided that this copyright notice is
9 * preserved in its entirety in all copies and derived works.
10 *
11 * HEWLETT-PACKARD COMPANY MAKES NO WARRANTIES, EXPRESSED OR IMPLIED,
12 * AS TO THE USEFULNESS OR CORRECTNESS OF THIS CODE OR ITS
13 * FITNESS FOR ANY PARTICULAR PURPOSE.
14 *
15 * Many thanks to Alessandro Rubini and Jonathan Corbet!
16 *
17 * Author: Andrew Christian
18 * 28 May 2002
19 */
20 #include <linux/moduleparam.h>
21 #include <linux/module.h>
22 #include <linux/init.h>
23
24 #include <linux/kernel.h>
25 #include <linux/fs.h>
26 #include <linux/slab.h>
27 #include <linux/errno.h>
28 #include <linux/hdreg.h>
29 #include <linux/kdev_t.h>
30 #include <linux/blkdev.h>
31 #include <linux/mutex.h>
32 #include <linux/scatterlist.h>
33 #include <linux/string_helpers.h>
34 #include <linux/delay.h>
35 #include <linux/capability.h>
36 #include <linux/compat.h>
37 #include <linux/pm_runtime.h>
38
39 #include <linux/mmc/ioctl.h>
40 #include <linux/mmc/card.h>
41 #include <linux/mmc/host.h>
42 #include <linux/mmc/mmc.h>
43 #include <linux/mmc/sd.h>
44
45 #include <asm/uaccess.h>
46
47 #include "queue.h"
48
49 MODULE_ALIAS("mmc:block");
50
51 #ifdef KERNEL
52 #ifdef MODULE_PARAM_PREFIX
53 #undef MODULE_PARAM_PREFIX
54 #endif
55 #define MODULE_PARAM_PREFIX "mmcblk."
56 #endif
57
58 #define INAND_CMD38_ARG_EXT_CSD 113
59 #define INAND_CMD38_ARG_ERASE 0x00
60 #define INAND_CMD38_ARG_TRIM 0x01
61 #define INAND_CMD38_ARG_SECERASE 0x80
62 #define INAND_CMD38_ARG_SECTRIM1 0x81
63 #define INAND_CMD38_ARG_SECTRIM2 0x88
64 #define MMC_BLK_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */
65 #define MMC_SANITIZE_REQ_TIMEOUT 240000
66 #define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16)
67
68 #define mmc_req_rel_wr(req) ((req->cmd_flags & REQ_FUA) && \
69 (rq_data_dir(req) == WRITE))
70 #define PACKED_CMD_VER 0x01
71 #define PACKED_CMD_WR 0x02
72
73 static DEFINE_MUTEX(block_mutex);
74
75 /*
76 * The defaults come from config options but can be overriden by module
77 * or bootarg options.
78 */
79 static int perdev_minors = CONFIG_MMC_BLOCK_MINORS;
80
81 /*
82 * We've only got one major, so number of mmcblk devices is
83 * limited to (1 << 20) / number of minors per device. It is also
84 * currently limited by the size of the static bitmaps below.
85 */
86 static int max_devices;
87
88 #define MAX_DEVICES 256
89
90 /* TODO: Replace these with struct ida */
91 static DECLARE_BITMAP(dev_use, MAX_DEVICES);
92 static DECLARE_BITMAP(name_use, MAX_DEVICES);
93
94 /*
95 * There is one mmc_blk_data per slot.
96 */
97 struct mmc_blk_data {
98 spinlock_t lock;
99 struct gendisk *disk;
100 struct mmc_queue queue;
101 struct list_head part;
102
103 unsigned int flags;
104 #define MMC_BLK_CMD23 (1 << 0) /* Can do SET_BLOCK_COUNT for multiblock */
105 #define MMC_BLK_REL_WR (1 << 1) /* MMC Reliable write support */
106 #define MMC_BLK_PACKED_CMD (1 << 2) /* MMC packed command support */
107
108 unsigned int usage;
109 unsigned int read_only;
110 unsigned int part_type;
111 unsigned int name_idx;
112 unsigned int reset_done;
113 #define MMC_BLK_READ BIT(0)
114 #define MMC_BLK_WRITE BIT(1)
115 #define MMC_BLK_DISCARD BIT(2)
116 #define MMC_BLK_SECDISCARD BIT(3)
117
118 /*
119 * Only set in main mmc_blk_data associated
120 * with mmc_card with dev_set_drvdata, and keeps
121 * track of the current selected device partition.
122 */
123 unsigned int part_curr;
124 struct device_attribute force_ro;
125 struct device_attribute power_ro_lock;
126 int area_type;
127 };
128
129 static DEFINE_MUTEX(open_lock);
130
131 enum {
132 MMC_PACKED_NR_IDX = -1,
133 MMC_PACKED_NR_ZERO,
134 MMC_PACKED_NR_SINGLE,
135 };
136
137 module_param(perdev_minors, int, 0444);
138 MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device");
139
140 static inline int mmc_blk_part_switch(struct mmc_card *card,
141 struct mmc_blk_data *md);
142 static int get_card_status(struct mmc_card *card, u32 *status, int retries);
143
144 static inline void mmc_blk_clear_packed(struct mmc_queue_req *mqrq)
145 {
146 struct mmc_packed *packed = mqrq->packed;
147
148 BUG_ON(!packed);
149
150 mqrq->cmd_type = MMC_PACKED_NONE;
151 packed->nr_entries = MMC_PACKED_NR_ZERO;
152 packed->idx_failure = MMC_PACKED_NR_IDX;
153 packed->retries = 0;
154 packed->blocks = 0;
155 }
156
157 static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk)
158 {
159 struct mmc_blk_data *md;
160
161 mutex_lock(&open_lock);
162 md = disk->private_data;
163 if (md && md->usage == 0)
164 md = NULL;
165 if (md)
166 md->usage++;
167 mutex_unlock(&open_lock);
168
169 return md;
170 }
171
172 static inline int mmc_get_devidx(struct gendisk *disk)
173 {
174 int devmaj = MAJOR(disk_devt(disk));
175 int devidx = MINOR(disk_devt(disk)) / perdev_minors;
176
177 if (!devmaj)
178 devidx = disk->first_minor / perdev_minors;
179 return devidx;
180 }
181
182 static void mmc_blk_put(struct mmc_blk_data *md)
183 {
184 mutex_lock(&open_lock);
185 md->usage--;
186 if (md->usage == 0) {
187 int devidx = mmc_get_devidx(md->disk);
188 blk_cleanup_queue(md->queue.queue);
189
190 __clear_bit(devidx, dev_use);
191
192 put_disk(md->disk);
193 kfree(md);
194 }
195 mutex_unlock(&open_lock);
196 }
197
198 static ssize_t power_ro_lock_show(struct device *dev,
199 struct device_attribute *attr, char *buf)
200 {
201 int ret;
202 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
203 struct mmc_card *card = md->queue.card;
204 int locked = 0;
205
206 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PERM_WP_EN)
207 locked = 2;
208 else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN)
209 locked = 1;
210
211 ret = snprintf(buf, PAGE_SIZE, "%d\n", locked);
212
213 mmc_blk_put(md);
214
215 return ret;
216 }
217
218 static ssize_t power_ro_lock_store(struct device *dev,
219 struct device_attribute *attr, const char *buf, size_t count)
220 {
221 int ret;
222 struct mmc_blk_data *md, *part_md;
223 struct mmc_card *card;
224 unsigned long set;
225
226 if (kstrtoul(buf, 0, &set))
227 return -EINVAL;
228
229 if (set != 1)
230 return count;
231
232 md = mmc_blk_get(dev_to_disk(dev));
233 card = md->queue.card;
234
235 mmc_get_card(card);
236
237 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP,
238 card->ext_csd.boot_ro_lock |
239 EXT_CSD_BOOT_WP_B_PWR_WP_EN,
240 card->ext_csd.part_time);
241 if (ret)
242 pr_err("%s: Locking boot partition ro until next power on failed: %d\n", md->disk->disk_name, ret);
243 else
244 card->ext_csd.boot_ro_lock |= EXT_CSD_BOOT_WP_B_PWR_WP_EN;
245
246 mmc_put_card(card);
247
248 if (!ret) {
249 pr_info("%s: Locking boot partition ro until next power on\n",
250 md->disk->disk_name);
251 set_disk_ro(md->disk, 1);
252
253 list_for_each_entry(part_md, &md->part, part)
254 if (part_md->area_type == MMC_BLK_DATA_AREA_BOOT) {
255 pr_info("%s: Locking boot partition ro until next power on\n", part_md->disk->disk_name);
256 set_disk_ro(part_md->disk, 1);
257 }
258 }
259
260 mmc_blk_put(md);
261 return count;
262 }
263
264 static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr,
265 char *buf)
266 {
267 int ret;
268 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
269
270 ret = snprintf(buf, PAGE_SIZE, "%d\n",
271 get_disk_ro(dev_to_disk(dev)) ^
272 md->read_only);
273 mmc_blk_put(md);
274 return ret;
275 }
276
277 static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr,
278 const char *buf, size_t count)
279 {
280 int ret;
281 char *end;
282 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
283 unsigned long set = simple_strtoul(buf, &end, 0);
284 if (end == buf) {
285 ret = -EINVAL;
286 goto out;
287 }
288
289 set_disk_ro(dev_to_disk(dev), set || md->read_only);
290 ret = count;
291 out:
292 mmc_blk_put(md);
293 return ret;
294 }
295
296 static int mmc_blk_open(struct block_device *bdev, fmode_t mode)
297 {
298 struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk);
299 int ret = -ENXIO;
300
301 mutex_lock(&block_mutex);
302 if (md) {
303 if (md->usage == 2)
304 check_disk_change(bdev);
305 ret = 0;
306
307 if ((mode & FMODE_WRITE) && md->read_only) {
308 mmc_blk_put(md);
309 ret = -EROFS;
310 }
311 }
312 mutex_unlock(&block_mutex);
313
314 return ret;
315 }
316
317 static void mmc_blk_release(struct gendisk *disk, fmode_t mode)
318 {
319 struct mmc_blk_data *md = disk->private_data;
320
321 mutex_lock(&block_mutex);
322 mmc_blk_put(md);
323 mutex_unlock(&block_mutex);
324 }
325
326 static int
327 mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
328 {
329 geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16);
330 geo->heads = 4;
331 geo->sectors = 16;
332 return 0;
333 }
334
335 struct mmc_blk_ioc_data {
336 struct mmc_ioc_cmd ic;
337 unsigned char *buf;
338 u64 buf_bytes;
339 };
340
341 static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user(
342 struct mmc_ioc_cmd __user *user)
343 {
344 struct mmc_blk_ioc_data *idata;
345 int err;
346
347 idata = kzalloc(sizeof(*idata), GFP_KERNEL);
348 if (!idata) {
349 err = -ENOMEM;
350 goto out;
351 }
352
353 if (copy_from_user(&idata->ic, user, sizeof(idata->ic))) {
354 err = -EFAULT;
355 goto idata_err;
356 }
357
358 idata->buf_bytes = (u64) idata->ic.blksz * idata->ic.blocks;
359 if (idata->buf_bytes > MMC_IOC_MAX_BYTES) {
360 err = -EOVERFLOW;
361 goto idata_err;
362 }
363
364 if (!idata->buf_bytes)
365 return idata;
366
367 idata->buf = kzalloc(idata->buf_bytes, GFP_KERNEL);
368 if (!idata->buf) {
369 err = -ENOMEM;
370 goto idata_err;
371 }
372
373 if (copy_from_user(idata->buf, (void __user *)(unsigned long)
374 idata->ic.data_ptr, idata->buf_bytes)) {
375 err = -EFAULT;
376 goto copy_err;
377 }
378
379 return idata;
380
381 copy_err:
382 kfree(idata->buf);
383 idata_err:
384 kfree(idata);
385 out:
386 return ERR_PTR(err);
387 }
388
389 static int mmc_blk_ioctl_copy_to_user(struct mmc_ioc_cmd __user *ic_ptr,
390 struct mmc_blk_ioc_data *idata)
391 {
392 struct mmc_ioc_cmd *ic = &idata->ic;
393
394 if (copy_to_user(&(ic_ptr->response), ic->response,
395 sizeof(ic->response)))
396 return -EFAULT;
397
398 if (!idata->ic.write_flag) {
399 if (copy_to_user((void __user *)(unsigned long)ic->data_ptr,
400 idata->buf, idata->buf_bytes))
401 return -EFAULT;
402 }
403
404 return 0;
405 }
406
407 static int ioctl_rpmb_card_status_poll(struct mmc_card *card, u32 *status,
408 u32 retries_max)
409 {
410 int err;
411 u32 retry_count = 0;
412
413 if (!status || !retries_max)
414 return -EINVAL;
415
416 do {
417 err = get_card_status(card, status, 5);
418 if (err)
419 break;
420
421 if (!R1_STATUS(*status) &&
422 (R1_CURRENT_STATE(*status) != R1_STATE_PRG))
423 break; /* RPMB programming operation complete */
424
425 /*
426 * Rechedule to give the MMC device a chance to continue
427 * processing the previous command without being polled too
428 * frequently.
429 */
430 usleep_range(1000, 5000);
431 } while (++retry_count < retries_max);
432
433 if (retry_count == retries_max)
434 err = -EPERM;
435
436 return err;
437 }
438
439 static int ioctl_do_sanitize(struct mmc_card *card)
440 {
441 int err;
442
443 if (!mmc_can_sanitize(card)) {
444 pr_warn("%s: %s - SANITIZE is not supported\n",
445 mmc_hostname(card->host), __func__);
446 err = -EOPNOTSUPP;
447 goto out;
448 }
449
450 pr_debug("%s: %s - SANITIZE IN PROGRESS...\n",
451 mmc_hostname(card->host), __func__);
452
453 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
454 EXT_CSD_SANITIZE_START, 1,
455 MMC_SANITIZE_REQ_TIMEOUT);
456
457 if (err)
458 pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n",
459 mmc_hostname(card->host), __func__, err);
460
461 pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card->host),
462 __func__);
463 out:
464 return err;
465 }
466
467 static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md,
468 struct mmc_blk_ioc_data *idata)
469 {
470 struct mmc_command cmd = {0};
471 struct mmc_data data = {0};
472 struct mmc_request mrq = {NULL};
473 struct scatterlist sg;
474 int err;
475 int is_rpmb = false;
476 u32 status = 0;
477
478 if (!card || !md || !idata)
479 return -EINVAL;
480
481 if (md->area_type & MMC_BLK_DATA_AREA_RPMB)
482 is_rpmb = true;
483
484 cmd.opcode = idata->ic.opcode;
485 cmd.arg = idata->ic.arg;
486 cmd.flags = idata->ic.flags;
487
488 if (idata->buf_bytes) {
489 data.sg = &sg;
490 data.sg_len = 1;
491 data.blksz = idata->ic.blksz;
492 data.blocks = idata->ic.blocks;
493
494 sg_init_one(data.sg, idata->buf, idata->buf_bytes);
495
496 if (idata->ic.write_flag)
497 data.flags = MMC_DATA_WRITE;
498 else
499 data.flags = MMC_DATA_READ;
500
501 /* data.flags must already be set before doing this. */
502 mmc_set_data_timeout(&data, card);
503
504 /* Allow overriding the timeout_ns for empirical tuning. */
505 if (idata->ic.data_timeout_ns)
506 data.timeout_ns = idata->ic.data_timeout_ns;
507
508 if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
509 /*
510 * Pretend this is a data transfer and rely on the
511 * host driver to compute timeout. When all host
512 * drivers support cmd.cmd_timeout for R1B, this
513 * can be changed to:
514 *
515 * mrq.data = NULL;
516 * cmd.cmd_timeout = idata->ic.cmd_timeout_ms;
517 */
518 data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000;
519 }
520
521 mrq.data = &data;
522 }
523
524 mrq.cmd = &cmd;
525
526 err = mmc_blk_part_switch(card, md);
527 if (err)
528 return err;
529
530 if (idata->ic.is_acmd) {
531 err = mmc_app_cmd(card->host, card);
532 if (err)
533 return err;
534 }
535
536 if (is_rpmb) {
537 err = mmc_set_blockcount(card, data.blocks,
538 idata->ic.write_flag & (1 << 31));
539 if (err)
540 return err;
541 }
542
543 if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) &&
544 (cmd.opcode == MMC_SWITCH)) {
545 err = ioctl_do_sanitize(card);
546
547 if (err)
548 pr_err("%s: ioctl_do_sanitize() failed. err = %d",
549 __func__, err);
550
551 return err;
552 }
553
554 mmc_wait_for_req(card->host, &mrq);
555
556 if (cmd.error) {
557 dev_err(mmc_dev(card->host), "%s: cmd error %d\n",
558 __func__, cmd.error);
559 return cmd.error;
560 }
561 if (data.error) {
562 dev_err(mmc_dev(card->host), "%s: data error %d\n",
563 __func__, data.error);
564 return data.error;
565 }
566
567 /*
568 * According to the SD specs, some commands require a delay after
569 * issuing the command.
570 */
571 if (idata->ic.postsleep_min_us)
572 usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us);
573
574 memcpy(&(idata->ic.response), cmd.resp, sizeof(cmd.resp));
575
576 if (is_rpmb) {
577 /*
578 * Ensure RPMB command has completed by polling CMD13
579 * "Send Status".
580 */
581 err = ioctl_rpmb_card_status_poll(card, &status, 5);
582 if (err)
583 dev_err(mmc_dev(card->host),
584 "%s: Card Status=0x%08X, error %d\n",
585 __func__, status, err);
586 }
587
588 return err;
589 }
590
591 static int mmc_blk_ioctl_cmd(struct block_device *bdev,
592 struct mmc_ioc_cmd __user *ic_ptr)
593 {
594 struct mmc_blk_ioc_data *idata;
595 struct mmc_blk_data *md;
596 struct mmc_card *card;
597 int err = 0, ioc_err = 0;
598
599 /*
600 * The caller must have CAP_SYS_RAWIO, and must be calling this on the
601 * whole block device, not on a partition. This prevents overspray
602 * between sibling partitions.
603 */
604 if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
605 return -EPERM;
606
607 idata = mmc_blk_ioctl_copy_from_user(ic_ptr);
608 if (IS_ERR(idata))
609 return PTR_ERR(idata);
610
611 md = mmc_blk_get(bdev->bd_disk);
612 if (!md) {
613 err = -EINVAL;
614 goto cmd_err;
615 }
616
617 card = md->queue.card;
618 if (IS_ERR(card)) {
619 err = PTR_ERR(card);
620 goto cmd_done;
621 }
622
623 mmc_get_card(card);
624
625 ioc_err = __mmc_blk_ioctl_cmd(card, md, idata);
626
627 mmc_put_card(card);
628
629 err = mmc_blk_ioctl_copy_to_user(ic_ptr, idata);
630
631 cmd_done:
632 mmc_blk_put(md);
633 cmd_err:
634 kfree(idata->buf);
635 kfree(idata);
636 return ioc_err ? ioc_err : err;
637 }
638
639 static int mmc_blk_ioctl_multi_cmd(struct block_device *bdev,
640 struct mmc_ioc_multi_cmd __user *user)
641 {
642 struct mmc_blk_ioc_data **idata = NULL;
643 struct mmc_ioc_cmd __user *cmds = user->cmds;
644 struct mmc_card *card;
645 struct mmc_blk_data *md;
646 int i, err = 0, ioc_err = 0;
647 __u64 num_of_cmds;
648
649 /*
650 * The caller must have CAP_SYS_RAWIO, and must be calling this on the
651 * whole block device, not on a partition. This prevents overspray
652 * between sibling partitions.
653 */
654 if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
655 return -EPERM;
656
657 if (copy_from_user(&num_of_cmds, &user->num_of_cmds,
658 sizeof(num_of_cmds)))
659 return -EFAULT;
660
661 if (num_of_cmds > MMC_IOC_MAX_CMDS)
662 return -EINVAL;
663
664 idata = kcalloc(num_of_cmds, sizeof(*idata), GFP_KERNEL);
665 if (!idata)
666 return -ENOMEM;
667
668 for (i = 0; i < num_of_cmds; i++) {
669 idata[i] = mmc_blk_ioctl_copy_from_user(&cmds[i]);
670 if (IS_ERR(idata[i])) {
671 err = PTR_ERR(idata[i]);
672 num_of_cmds = i;
673 goto cmd_err;
674 }
675 }
676
677 md = mmc_blk_get(bdev->bd_disk);
678 if (!md)
679 goto cmd_err;
680
681 card = md->queue.card;
682 if (IS_ERR(card)) {
683 err = PTR_ERR(card);
684 goto cmd_done;
685 }
686
687 mmc_get_card(card);
688
689 for (i = 0; i < num_of_cmds && !ioc_err; i++)
690 ioc_err = __mmc_blk_ioctl_cmd(card, md, idata[i]);
691
692 mmc_put_card(card);
693
694 /* copy to user if data and response */
695 for (i = 0; i < num_of_cmds && !err; i++)
696 err = mmc_blk_ioctl_copy_to_user(&cmds[i], idata[i]);
697
698 cmd_done:
699 mmc_blk_put(md);
700 cmd_err:
701 for (i = 0; i < num_of_cmds; i++) {
702 kfree(idata[i]->buf);
703 kfree(idata[i]);
704 }
705 kfree(idata);
706 return ioc_err ? ioc_err : err;
707 }
708
709 static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode,
710 unsigned int cmd, unsigned long arg)
711 {
712 switch (cmd) {
713 case MMC_IOC_CMD:
714 return mmc_blk_ioctl_cmd(bdev,
715 (struct mmc_ioc_cmd __user *)arg);
716 case MMC_IOC_MULTI_CMD:
717 return mmc_blk_ioctl_multi_cmd(bdev,
718 (struct mmc_ioc_multi_cmd __user *)arg);
719 default:
720 return -EINVAL;
721 }
722 }
723
724 #ifdef CONFIG_COMPAT
725 static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode,
726 unsigned int cmd, unsigned long arg)
727 {
728 return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg));
729 }
730 #endif
731
732 static const struct block_device_operations mmc_bdops = {
733 .open = mmc_blk_open,
734 .release = mmc_blk_release,
735 .getgeo = mmc_blk_getgeo,
736 .owner = THIS_MODULE,
737 .ioctl = mmc_blk_ioctl,
738 #ifdef CONFIG_COMPAT
739 .compat_ioctl = mmc_blk_compat_ioctl,
740 #endif
741 };
742
743 static inline int mmc_blk_part_switch(struct mmc_card *card,
744 struct mmc_blk_data *md)
745 {
746 int ret;
747 struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev);
748
749 if (main_md->part_curr == md->part_type)
750 return 0;
751
752 if (mmc_card_mmc(card)) {
753 u8 part_config = card->ext_csd.part_config;
754
755 part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
756 part_config |= md->part_type;
757
758 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
759 EXT_CSD_PART_CONFIG, part_config,
760 card->ext_csd.part_time);
761 if (ret)
762 return ret;
763
764 card->ext_csd.part_config = part_config;
765 }
766
767 main_md->part_curr = md->part_type;
768 return 0;
769 }
770
771 static u32 mmc_sd_num_wr_blocks(struct mmc_card *card)
772 {
773 int err;
774 u32 result;
775 __be32 *blocks;
776
777 struct mmc_request mrq = {NULL};
778 struct mmc_command cmd = {0};
779 struct mmc_data data = {0};
780
781 struct scatterlist sg;
782
783 cmd.opcode = MMC_APP_CMD;
784 cmd.arg = card->rca << 16;
785 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
786
787 err = mmc_wait_for_cmd(card->host, &cmd, 0);
788 if (err)
789 return (u32)-1;
790 if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD))
791 return (u32)-1;
792
793 memset(&cmd, 0, sizeof(struct mmc_command));
794
795 cmd.opcode = SD_APP_SEND_NUM_WR_BLKS;
796 cmd.arg = 0;
797 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
798
799 data.blksz = 4;
800 data.blocks = 1;
801 data.flags = MMC_DATA_READ;
802 data.sg = &sg;
803 data.sg_len = 1;
804 mmc_set_data_timeout(&data, card);
805
806 mrq.cmd = &cmd;
807 mrq.data = &data;
808
809 blocks = kmalloc(4, GFP_KERNEL);
810 if (!blocks)
811 return (u32)-1;
812
813 sg_init_one(&sg, blocks, 4);
814
815 mmc_wait_for_req(card->host, &mrq);
816
817 result = ntohl(*blocks);
818 kfree(blocks);
819
820 if (cmd.error || data.error)
821 result = (u32)-1;
822
823 return result;
824 }
825
826 static int get_card_status(struct mmc_card *card, u32 *status, int retries)
827 {
828 struct mmc_command cmd = {0};
829 int err;
830
831 cmd.opcode = MMC_SEND_STATUS;
832 if (!mmc_host_is_spi(card->host))
833 cmd.arg = card->rca << 16;
834 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
835 err = mmc_wait_for_cmd(card->host, &cmd, retries);
836 if (err == 0)
837 *status = cmd.resp[0];
838 return err;
839 }
840
841 static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms,
842 bool hw_busy_detect, struct request *req, int *gen_err)
843 {
844 unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
845 int err = 0;
846 u32 status;
847
848 do {
849 err = get_card_status(card, &status, 5);
850 if (err) {
851 pr_err("%s: error %d requesting status\n",
852 req->rq_disk->disk_name, err);
853 return err;
854 }
855
856 if (status & R1_ERROR) {
857 pr_err("%s: %s: error sending status cmd, status %#x\n",
858 req->rq_disk->disk_name, __func__, status);
859 *gen_err = 1;
860 }
861
862 /* We may rely on the host hw to handle busy detection.*/
863 if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) &&
864 hw_busy_detect)
865 break;
866
867 /*
868 * Timeout if the device never becomes ready for data and never
869 * leaves the program state.
870 */
871 if (time_after(jiffies, timeout)) {
872 pr_err("%s: Card stuck in programming state! %s %s\n",
873 mmc_hostname(card->host),
874 req->rq_disk->disk_name, __func__);
875 return -ETIMEDOUT;
876 }
877
878 /*
879 * Some cards mishandle the status bits,
880 * so make sure to check both the busy
881 * indication and the card state.
882 */
883 } while (!(status & R1_READY_FOR_DATA) ||
884 (R1_CURRENT_STATE(status) == R1_STATE_PRG));
885
886 return err;
887 }
888
889 static int send_stop(struct mmc_card *card, unsigned int timeout_ms,
890 struct request *req, int *gen_err, u32 *stop_status)
891 {
892 struct mmc_host *host = card->host;
893 struct mmc_command cmd = {0};
894 int err;
895 bool use_r1b_resp = rq_data_dir(req) == WRITE;
896
897 /*
898 * Normally we use R1B responses for WRITE, but in cases where the host
899 * has specified a max_busy_timeout we need to validate it. A failure
900 * means we need to prevent the host from doing hw busy detection, which
901 * is done by converting to a R1 response instead.
902 */
903 if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout))
904 use_r1b_resp = false;
905
906 cmd.opcode = MMC_STOP_TRANSMISSION;
907 if (use_r1b_resp) {
908 cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
909 cmd.busy_timeout = timeout_ms;
910 } else {
911 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
912 }
913
914 err = mmc_wait_for_cmd(host, &cmd, 5);
915 if (err)
916 return err;
917
918 *stop_status = cmd.resp[0];
919
920 /* No need to check card status in case of READ. */
921 if (rq_data_dir(req) == READ)
922 return 0;
923
924 if (!mmc_host_is_spi(host) &&
925 (*stop_status & R1_ERROR)) {
926 pr_err("%s: %s: general error sending stop command, resp %#x\n",
927 req->rq_disk->disk_name, __func__, *stop_status);
928 *gen_err = 1;
929 }
930
931 return card_busy_detect(card, timeout_ms, use_r1b_resp, req, gen_err);
932 }
933
934 #define ERR_NOMEDIUM 3
935 #define ERR_RETRY 2
936 #define ERR_ABORT 1
937 #define ERR_CONTINUE 0
938
939 static int mmc_blk_cmd_error(struct request *req, const char *name, int error,
940 bool status_valid, u32 status)
941 {
942 switch (error) {
943 case -EILSEQ:
944 /* response crc error, retry the r/w cmd */
945 pr_err("%s: %s sending %s command, card status %#x\n",
946 req->rq_disk->disk_name, "response CRC error",
947 name, status);
948 return ERR_RETRY;
949
950 case -ETIMEDOUT:
951 pr_err("%s: %s sending %s command, card status %#x\n",
952 req->rq_disk->disk_name, "timed out", name, status);
953
954 /* If the status cmd initially failed, retry the r/w cmd */
955 if (!status_valid)
956 return ERR_RETRY;
957
958 /*
959 * If it was a r/w cmd crc error, or illegal command
960 * (eg, issued in wrong state) then retry - we should
961 * have corrected the state problem above.
962 */
963 if (status & (R1_COM_CRC_ERROR | R1_ILLEGAL_COMMAND))
964 return ERR_RETRY;
965
966 /* Otherwise abort the command */
967 return ERR_ABORT;
968
969 default:
970 /* We don't understand the error code the driver gave us */
971 pr_err("%s: unknown error %d sending read/write command, card status %#x\n",
972 req->rq_disk->disk_name, error, status);
973 return ERR_ABORT;
974 }
975 }
976
977 /*
978 * Initial r/w and stop cmd error recovery.
979 * We don't know whether the card received the r/w cmd or not, so try to
980 * restore things back to a sane state. Essentially, we do this as follows:
981 * - Obtain card status. If the first attempt to obtain card status fails,
982 * the status word will reflect the failed status cmd, not the failed
983 * r/w cmd. If we fail to obtain card status, it suggests we can no
984 * longer communicate with the card.
985 * - Check the card state. If the card received the cmd but there was a
986 * transient problem with the response, it might still be in a data transfer
987 * mode. Try to send it a stop command. If this fails, we can't recover.
988 * - If the r/w cmd failed due to a response CRC error, it was probably
989 * transient, so retry the cmd.
990 * - If the r/w cmd timed out, but we didn't get the r/w cmd status, retry.
991 * - If the r/w cmd timed out, and the r/w cmd failed due to CRC error or
992 * illegal cmd, retry.
993 * Otherwise we don't understand what happened, so abort.
994 */
995 static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req,
996 struct mmc_blk_request *brq, int *ecc_err, int *gen_err)
997 {
998 bool prev_cmd_status_valid = true;
999 u32 status, stop_status = 0;
1000 int err, retry;
1001
1002 if (mmc_card_removed(card))
1003 return ERR_NOMEDIUM;
1004
1005 /*
1006 * Try to get card status which indicates both the card state
1007 * and why there was no response. If the first attempt fails,
1008 * we can't be sure the returned status is for the r/w command.
1009 */
1010 for (retry = 2; retry >= 0; retry--) {
1011 err = get_card_status(card, &status, 0);
1012 if (!err)
1013 break;
1014
1015 /* Re-tune if needed */
1016 mmc_retune_recheck(card->host);
1017
1018 prev_cmd_status_valid = false;
1019 pr_err("%s: error %d sending status command, %sing\n",
1020 req->rq_disk->disk_name, err, retry ? "retry" : "abort");
1021 }
1022
1023 /* We couldn't get a response from the card. Give up. */
1024 if (err) {
1025 /* Check if the card is removed */
1026 if (mmc_detect_card_removed(card->host))
1027 return ERR_NOMEDIUM;
1028 return ERR_ABORT;
1029 }
1030
1031 /* Flag ECC errors */
1032 if ((status & R1_CARD_ECC_FAILED) ||
1033 (brq->stop.resp[0] & R1_CARD_ECC_FAILED) ||
1034 (brq->cmd.resp[0] & R1_CARD_ECC_FAILED))
1035 *ecc_err = 1;
1036
1037 /* Flag General errors */
1038 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ)
1039 if ((status & R1_ERROR) ||
1040 (brq->stop.resp[0] & R1_ERROR)) {
1041 pr_err("%s: %s: general error sending stop or status command, stop cmd response %#x, card status %#x\n",
1042 req->rq_disk->disk_name, __func__,
1043 brq->stop.resp[0], status);
1044 *gen_err = 1;
1045 }
1046
1047 /*
1048 * Check the current card state. If it is in some data transfer
1049 * mode, tell it to stop (and hopefully transition back to TRAN.)
1050 */
1051 if (R1_CURRENT_STATE(status) == R1_STATE_DATA ||
1052 R1_CURRENT_STATE(status) == R1_STATE_RCV) {
1053 err = send_stop(card,
1054 DIV_ROUND_UP(brq->data.timeout_ns, 1000000),
1055 req, gen_err, &stop_status);
1056 if (err) {
1057 pr_err("%s: error %d sending stop command\n",
1058 req->rq_disk->disk_name, err);
1059 /*
1060 * If the stop cmd also timed out, the card is probably
1061 * not present, so abort. Other errors are bad news too.
1062 */
1063 return ERR_ABORT;
1064 }
1065
1066 if (stop_status & R1_CARD_ECC_FAILED)
1067 *ecc_err = 1;
1068 }
1069
1070 /* Check for set block count errors */
1071 if (brq->sbc.error)
1072 return mmc_blk_cmd_error(req, "SET_BLOCK_COUNT", brq->sbc.error,
1073 prev_cmd_status_valid, status);
1074
1075 /* Check for r/w command errors */
1076 if (brq->cmd.error)
1077 return mmc_blk_cmd_error(req, "r/w cmd", brq->cmd.error,
1078 prev_cmd_status_valid, status);
1079
1080 /* Data errors */
1081 if (!brq->stop.error)
1082 return ERR_CONTINUE;
1083
1084 /* Now for stop errors. These aren't fatal to the transfer. */
1085 pr_info("%s: error %d sending stop command, original cmd response %#x, card status %#x\n",
1086 req->rq_disk->disk_name, brq->stop.error,
1087 brq->cmd.resp[0], status);
1088
1089 /*
1090 * Subsitute in our own stop status as this will give the error
1091 * state which happened during the execution of the r/w command.
1092 */
1093 if (stop_status) {
1094 brq->stop.resp[0] = stop_status;
1095 brq->stop.error = 0;
1096 }
1097 return ERR_CONTINUE;
1098 }
1099
1100 static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host,
1101 int type)
1102 {
1103 int err;
1104
1105 if (md->reset_done & type)
1106 return -EEXIST;
1107
1108 md->reset_done |= type;
1109 err = mmc_hw_reset(host);
1110 /* Ensure we switch back to the correct partition */
1111 if (err != -EOPNOTSUPP) {
1112 struct mmc_blk_data *main_md =
1113 dev_get_drvdata(&host->card->dev);
1114 int part_err;
1115
1116 main_md->part_curr = main_md->part_type;
1117 part_err = mmc_blk_part_switch(host->card, md);
1118 if (part_err) {
1119 /*
1120 * We have failed to get back into the correct
1121 * partition, so we need to abort the whole request.
1122 */
1123 return -ENODEV;
1124 }
1125 }
1126 return err;
1127 }
1128
1129 static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type)
1130 {
1131 md->reset_done &= ~type;
1132 }
1133
1134 int mmc_access_rpmb(struct mmc_queue *mq)
1135 {
1136 struct mmc_blk_data *md = mq->data;
1137 /*
1138 * If this is a RPMB partition access, return ture
1139 */
1140 if (md && md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
1141 return true;
1142
1143 return false;
1144 }
1145
1146 static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
1147 {
1148 struct mmc_blk_data *md = mq->data;
1149 struct mmc_card *card = md->queue.card;
1150 unsigned int from, nr, arg;
1151 int err = 0, type = MMC_BLK_DISCARD;
1152
1153 if (!mmc_can_erase(card)) {
1154 err = -EOPNOTSUPP;
1155 goto out;
1156 }
1157
1158 from = blk_rq_pos(req);
1159 nr = blk_rq_sectors(req);
1160
1161 if (mmc_can_discard(card))
1162 arg = MMC_DISCARD_ARG;
1163 else if (mmc_can_trim(card))
1164 arg = MMC_TRIM_ARG;
1165 else
1166 arg = MMC_ERASE_ARG;
1167 retry:
1168 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1169 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1170 INAND_CMD38_ARG_EXT_CSD,
1171 arg == MMC_TRIM_ARG ?
1172 INAND_CMD38_ARG_TRIM :
1173 INAND_CMD38_ARG_ERASE,
1174 0);
1175 if (err)
1176 goto out;
1177 }
1178 err = mmc_erase(card, from, nr, arg);
1179 out:
1180 if (err == -EIO && !mmc_blk_reset(md, card->host, type))
1181 goto retry;
1182 if (!err)
1183 mmc_blk_reset_success(md, type);
1184 blk_end_request(req, err, blk_rq_bytes(req));
1185
1186 return err ? 0 : 1;
1187 }
1188
1189 static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
1190 struct request *req)
1191 {
1192 struct mmc_blk_data *md = mq->data;
1193 struct mmc_card *card = md->queue.card;
1194 unsigned int from, nr, arg;
1195 int err = 0, type = MMC_BLK_SECDISCARD;
1196
1197 if (!(mmc_can_secure_erase_trim(card))) {
1198 err = -EOPNOTSUPP;
1199 goto out;
1200 }
1201
1202 from = blk_rq_pos(req);
1203 nr = blk_rq_sectors(req);
1204
1205 if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr))
1206 arg = MMC_SECURE_TRIM1_ARG;
1207 else
1208 arg = MMC_SECURE_ERASE_ARG;
1209
1210 retry:
1211 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1212 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1213 INAND_CMD38_ARG_EXT_CSD,
1214 arg == MMC_SECURE_TRIM1_ARG ?
1215 INAND_CMD38_ARG_SECTRIM1 :
1216 INAND_CMD38_ARG_SECERASE,
1217 0);
1218 if (err)
1219 goto out_retry;
1220 }
1221
1222 err = mmc_erase(card, from, nr, arg);
1223 if (err == -EIO)
1224 goto out_retry;
1225 if (err)
1226 goto out;
1227
1228 if (arg == MMC_SECURE_TRIM1_ARG) {
1229 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1230 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1231 INAND_CMD38_ARG_EXT_CSD,
1232 INAND_CMD38_ARG_SECTRIM2,
1233 0);
1234 if (err)
1235 goto out_retry;
1236 }
1237
1238 err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG);
1239 if (err == -EIO)
1240 goto out_retry;
1241 if (err)
1242 goto out;
1243 }
1244
1245 out_retry:
1246 if (err && !mmc_blk_reset(md, card->host, type))
1247 goto retry;
1248 if (!err)
1249 mmc_blk_reset_success(md, type);
1250 out:
1251 blk_end_request(req, err, blk_rq_bytes(req));
1252
1253 return err ? 0 : 1;
1254 }
1255
1256 static int mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req)
1257 {
1258 struct mmc_blk_data *md = mq->data;
1259 struct mmc_card *card = md->queue.card;
1260 int ret = 0;
1261
1262 ret = mmc_flush_cache(card);
1263 if (ret)
1264 ret = -EIO;
1265
1266 blk_end_request_all(req, ret);
1267
1268 return ret ? 0 : 1;
1269 }
1270
1271 /*
1272 * Reformat current write as a reliable write, supporting
1273 * both legacy and the enhanced reliable write MMC cards.
1274 * In each transfer we'll handle only as much as a single
1275 * reliable write can handle, thus finish the request in
1276 * partial completions.
1277 */
1278 static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq,
1279 struct mmc_card *card,
1280 struct request *req)
1281 {
1282 if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) {
1283 /* Legacy mode imposes restrictions on transfers. */
1284 if (!IS_ALIGNED(brq->cmd.arg, card->ext_csd.rel_sectors))
1285 brq->data.blocks = 1;
1286
1287 if (brq->data.blocks > card->ext_csd.rel_sectors)
1288 brq->data.blocks = card->ext_csd.rel_sectors;
1289 else if (brq->data.blocks < card->ext_csd.rel_sectors)
1290 brq->data.blocks = 1;
1291 }
1292 }
1293
1294 #define CMD_ERRORS \
1295 (R1_OUT_OF_RANGE | /* Command argument out of range */ \
1296 R1_ADDRESS_ERROR | /* Misaligned address */ \
1297 R1_BLOCK_LEN_ERROR | /* Transferred block length incorrect */\
1298 R1_WP_VIOLATION | /* Tried to write to protected block */ \
1299 R1_CC_ERROR | /* Card controller error */ \
1300 R1_ERROR) /* General/unknown error */
1301
1302 static int mmc_blk_err_check(struct mmc_card *card,
1303 struct mmc_async_req *areq)
1304 {
1305 struct mmc_queue_req *mq_mrq = container_of(areq, struct mmc_queue_req,
1306 mmc_active);
1307 struct mmc_blk_request *brq = &mq_mrq->brq;
1308 struct request *req = mq_mrq->req;
1309 int need_retune = card->host->need_retune;
1310 int ecc_err = 0, gen_err = 0;
1311
1312 /*
1313 * sbc.error indicates a problem with the set block count
1314 * command. No data will have been transferred.
1315 *
1316 * cmd.error indicates a problem with the r/w command. No
1317 * data will have been transferred.
1318 *
1319 * stop.error indicates a problem with the stop command. Data
1320 * may have been transferred, or may still be transferring.
1321 */
1322 if (brq->sbc.error || brq->cmd.error || brq->stop.error ||
1323 brq->data.error) {
1324 switch (mmc_blk_cmd_recovery(card, req, brq, &ecc_err, &gen_err)) {
1325 case ERR_RETRY:
1326 return MMC_BLK_RETRY;
1327 case ERR_ABORT:
1328 return MMC_BLK_ABORT;
1329 case ERR_NOMEDIUM:
1330 return MMC_BLK_NOMEDIUM;
1331 case ERR_CONTINUE:
1332 break;
1333 }
1334 }
1335
1336 /*
1337 * Check for errors relating to the execution of the
1338 * initial command - such as address errors. No data
1339 * has been transferred.
1340 */
1341 if (brq->cmd.resp[0] & CMD_ERRORS) {
1342 pr_err("%s: r/w command failed, status = %#x\n",
1343 req->rq_disk->disk_name, brq->cmd.resp[0]);
1344 return MMC_BLK_ABORT;
1345 }
1346
1347 /*
1348 * Everything else is either success, or a data error of some
1349 * kind. If it was a write, we may have transitioned to
1350 * program mode, which we have to wait for it to complete.
1351 */
1352 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) {
1353 int err;
1354
1355 /* Check stop command response */
1356 if (brq->stop.resp[0] & R1_ERROR) {
1357 pr_err("%s: %s: general error sending stop command, stop cmd response %#x\n",
1358 req->rq_disk->disk_name, __func__,
1359 brq->stop.resp[0]);
1360 gen_err = 1;
1361 }
1362
1363 err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, false, req,
1364 &gen_err);
1365 if (err)
1366 return MMC_BLK_CMD_ERR;
1367 }
1368
1369 /* if general error occurs, retry the write operation. */
1370 if (gen_err) {
1371 pr_warn("%s: retrying write for general error\n",
1372 req->rq_disk->disk_name);
1373 return MMC_BLK_RETRY;
1374 }
1375
1376 if (brq->data.error) {
1377 if (need_retune && !brq->retune_retry_done) {
1378 pr_info("%s: retrying because a re-tune was needed\n",
1379 req->rq_disk->disk_name);
1380 brq->retune_retry_done = 1;
1381 return MMC_BLK_RETRY;
1382 }
1383 pr_err("%s: error %d transferring data, sector %u, nr %u, cmd response %#x, card status %#x\n",
1384 req->rq_disk->disk_name, brq->data.error,
1385 (unsigned)blk_rq_pos(req),
1386 (unsigned)blk_rq_sectors(req),
1387 brq->cmd.resp[0], brq->stop.resp[0]);
1388
1389 if (rq_data_dir(req) == READ) {
1390 if (ecc_err)
1391 return MMC_BLK_ECC_ERR;
1392 return MMC_BLK_DATA_ERR;
1393 } else {
1394 return MMC_BLK_CMD_ERR;
1395 }
1396 }
1397
1398 if (!brq->data.bytes_xfered)
1399 return MMC_BLK_RETRY;
1400
1401 if (mmc_packed_cmd(mq_mrq->cmd_type)) {
1402 if (unlikely(brq->data.blocks << 9 != brq->data.bytes_xfered))
1403 return MMC_BLK_PARTIAL;
1404 else
1405 return MMC_BLK_SUCCESS;
1406 }
1407
1408 if (blk_rq_bytes(req) != brq->data.bytes_xfered)
1409 return MMC_BLK_PARTIAL;
1410
1411 return MMC_BLK_SUCCESS;
1412 }
1413
1414 static int mmc_blk_packed_err_check(struct mmc_card *card,
1415 struct mmc_async_req *areq)
1416 {
1417 struct mmc_queue_req *mq_rq = container_of(areq, struct mmc_queue_req,
1418 mmc_active);
1419 struct request *req = mq_rq->req;
1420 struct mmc_packed *packed = mq_rq->packed;
1421 int err, check, status;
1422 u8 *ext_csd;
1423
1424 BUG_ON(!packed);
1425
1426 packed->retries--;
1427 check = mmc_blk_err_check(card, areq);
1428 err = get_card_status(card, &status, 0);
1429 if (err) {
1430 pr_err("%s: error %d sending status command\n",
1431 req->rq_disk->disk_name, err);
1432 return MMC_BLK_ABORT;
1433 }
1434
1435 if (status & R1_EXCEPTION_EVENT) {
1436 err = mmc_get_ext_csd(card, &ext_csd);
1437 if (err) {
1438 pr_err("%s: error %d sending ext_csd\n",
1439 req->rq_disk->disk_name, err);
1440 return MMC_BLK_ABORT;
1441 }
1442
1443 if ((ext_csd[EXT_CSD_EXP_EVENTS_STATUS] &
1444 EXT_CSD_PACKED_FAILURE) &&
1445 (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1446 EXT_CSD_PACKED_GENERIC_ERROR)) {
1447 if (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1448 EXT_CSD_PACKED_INDEXED_ERROR) {
1449 packed->idx_failure =
1450 ext_csd[EXT_CSD_PACKED_FAILURE_INDEX] - 1;
1451 check = MMC_BLK_PARTIAL;
1452 }
1453 pr_err("%s: packed cmd failed, nr %u, sectors %u, "
1454 "failure index: %d\n",
1455 req->rq_disk->disk_name, packed->nr_entries,
1456 packed->blocks, packed->idx_failure);
1457 }
1458 kfree(ext_csd);
1459 }
1460
1461 return check;
1462 }
1463
1464 static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
1465 struct mmc_card *card,
1466 int disable_multi,
1467 struct mmc_queue *mq)
1468 {
1469 u32 readcmd, writecmd;
1470 struct mmc_blk_request *brq = &mqrq->brq;
1471 struct request *req = mqrq->req;
1472 struct mmc_blk_data *md = mq->data;
1473 bool do_data_tag;
1474
1475 /*
1476 * Reliable writes are used to implement Forced Unit Access and
1477 * are supported only on MMCs.
1478 */
1479 bool do_rel_wr = (req->cmd_flags & REQ_FUA) &&
1480 (rq_data_dir(req) == WRITE) &&
1481 (md->flags & MMC_BLK_REL_WR);
1482
1483 memset(brq, 0, sizeof(struct mmc_blk_request));
1484 brq->mrq.cmd = &brq->cmd;
1485 brq->mrq.data = &brq->data;
1486
1487 brq->cmd.arg = blk_rq_pos(req);
1488 if (!mmc_card_blockaddr(card))
1489 brq->cmd.arg <<= 9;
1490 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1491 brq->data.blksz = 512;
1492 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1493 brq->stop.arg = 0;
1494 brq->data.blocks = blk_rq_sectors(req);
1495
1496 /*
1497 * The block layer doesn't support all sector count
1498 * restrictions, so we need to be prepared for too big
1499 * requests.
1500 */
1501 if (brq->data.blocks > card->host->max_blk_count)
1502 brq->data.blocks = card->host->max_blk_count;
1503
1504 if (brq->data.blocks > 1) {
1505 /*
1506 * After a read error, we redo the request one sector
1507 * at a time in order to accurately determine which
1508 * sectors can be read successfully.
1509 */
1510 if (disable_multi)
1511 brq->data.blocks = 1;
1512
1513 /*
1514 * Some controllers have HW issues while operating
1515 * in multiple I/O mode
1516 */
1517 if (card->host->ops->multi_io_quirk)
1518 brq->data.blocks = card->host->ops->multi_io_quirk(card,
1519 (rq_data_dir(req) == READ) ?
1520 MMC_DATA_READ : MMC_DATA_WRITE,
1521 brq->data.blocks);
1522 }
1523
1524 if (brq->data.blocks > 1 || do_rel_wr) {
1525 /* SPI multiblock writes terminate using a special
1526 * token, not a STOP_TRANSMISSION request.
1527 */
1528 if (!mmc_host_is_spi(card->host) ||
1529 rq_data_dir(req) == READ)
1530 brq->mrq.stop = &brq->stop;
1531 readcmd = MMC_READ_MULTIPLE_BLOCK;
1532 writecmd = MMC_WRITE_MULTIPLE_BLOCK;
1533 } else {
1534 brq->mrq.stop = NULL;
1535 readcmd = MMC_READ_SINGLE_BLOCK;
1536 writecmd = MMC_WRITE_BLOCK;
1537 }
1538 if (rq_data_dir(req) == READ) {
1539 brq->cmd.opcode = readcmd;
1540 brq->data.flags |= MMC_DATA_READ;
1541 if (brq->mrq.stop)
1542 brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 |
1543 MMC_CMD_AC;
1544 } else {
1545 brq->cmd.opcode = writecmd;
1546 brq->data.flags |= MMC_DATA_WRITE;
1547 if (brq->mrq.stop)
1548 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B |
1549 MMC_CMD_AC;
1550 }
1551
1552 if (do_rel_wr)
1553 mmc_apply_rel_rw(brq, card, req);
1554
1555 /*
1556 * Data tag is used only during writing meta data to speed
1557 * up write and any subsequent read of this meta data
1558 */
1559 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1560 (req->cmd_flags & REQ_META) &&
1561 (rq_data_dir(req) == WRITE) &&
1562 ((brq->data.blocks * brq->data.blksz) >=
1563 card->ext_csd.data_tag_unit_size);
1564
1565 /*
1566 * Pre-defined multi-block transfers are preferable to
1567 * open ended-ones (and necessary for reliable writes).
1568 * However, it is not sufficient to just send CMD23,
1569 * and avoid the final CMD12, as on an error condition
1570 * CMD12 (stop) needs to be sent anyway. This, coupled
1571 * with Auto-CMD23 enhancements provided by some
1572 * hosts, means that the complexity of dealing
1573 * with this is best left to the host. If CMD23 is
1574 * supported by card and host, we'll fill sbc in and let
1575 * the host deal with handling it correctly. This means
1576 * that for hosts that don't expose MMC_CAP_CMD23, no
1577 * change of behavior will be observed.
1578 *
1579 * N.B: Some MMC cards experience perf degradation.
1580 * We'll avoid using CMD23-bounded multiblock writes for
1581 * these, while retaining features like reliable writes.
1582 */
1583 if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) &&
1584 (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) ||
1585 do_data_tag)) {
1586 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1587 brq->sbc.arg = brq->data.blocks |
1588 (do_rel_wr ? (1 << 31) : 0) |
1589 (do_data_tag ? (1 << 29) : 0);
1590 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1591 brq->mrq.sbc = &brq->sbc;
1592 }
1593
1594 mmc_set_data_timeout(&brq->data, card);
1595
1596 brq->data.sg = mqrq->sg;
1597 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1598
1599 /*
1600 * Adjust the sg list so it is the same size as the
1601 * request.
1602 */
1603 if (brq->data.blocks != blk_rq_sectors(req)) {
1604 int i, data_size = brq->data.blocks << 9;
1605 struct scatterlist *sg;
1606
1607 for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) {
1608 data_size -= sg->length;
1609 if (data_size <= 0) {
1610 sg->length += data_size;
1611 i++;
1612 break;
1613 }
1614 }
1615 brq->data.sg_len = i;
1616 }
1617
1618 mqrq->mmc_active.mrq = &brq->mrq;
1619 mqrq->mmc_active.err_check = mmc_blk_err_check;
1620
1621 mmc_queue_bounce_pre(mqrq);
1622 }
1623
1624 static inline u8 mmc_calc_packed_hdr_segs(struct request_queue *q,
1625 struct mmc_card *card)
1626 {
1627 unsigned int hdr_sz = mmc_large_sector(card) ? 4096 : 512;
1628 unsigned int max_seg_sz = queue_max_segment_size(q);
1629 unsigned int len, nr_segs = 0;
1630
1631 do {
1632 len = min(hdr_sz, max_seg_sz);
1633 hdr_sz -= len;
1634 nr_segs++;
1635 } while (hdr_sz);
1636
1637 return nr_segs;
1638 }
1639
1640 static u8 mmc_blk_prep_packed_list(struct mmc_queue *mq, struct request *req)
1641 {
1642 struct request_queue *q = mq->queue;
1643 struct mmc_card *card = mq->card;
1644 struct request *cur = req, *next = NULL;
1645 struct mmc_blk_data *md = mq->data;
1646 struct mmc_queue_req *mqrq = mq->mqrq_cur;
1647 bool en_rel_wr = card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN;
1648 unsigned int req_sectors = 0, phys_segments = 0;
1649 unsigned int max_blk_count, max_phys_segs;
1650 bool put_back = true;
1651 u8 max_packed_rw = 0;
1652 u8 reqs = 0;
1653
1654 if (!(md->flags & MMC_BLK_PACKED_CMD))
1655 goto no_packed;
1656
1657 if ((rq_data_dir(cur) == WRITE) &&
1658 mmc_host_packed_wr(card->host))
1659 max_packed_rw = card->ext_csd.max_packed_writes;
1660
1661 if (max_packed_rw == 0)
1662 goto no_packed;
1663
1664 if (mmc_req_rel_wr(cur) &&
1665 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1666 goto no_packed;
1667
1668 if (mmc_large_sector(card) &&
1669 !IS_ALIGNED(blk_rq_sectors(cur), 8))
1670 goto no_packed;
1671
1672 mmc_blk_clear_packed(mqrq);
1673
1674 max_blk_count = min(card->host->max_blk_count,
1675 card->host->max_req_size >> 9);
1676 if (unlikely(max_blk_count > 0xffff))
1677 max_blk_count = 0xffff;
1678
1679 max_phys_segs = queue_max_segments(q);
1680 req_sectors += blk_rq_sectors(cur);
1681 phys_segments += cur->nr_phys_segments;
1682
1683 if (rq_data_dir(cur) == WRITE) {
1684 req_sectors += mmc_large_sector(card) ? 8 : 1;
1685 phys_segments += mmc_calc_packed_hdr_segs(q, card);
1686 }
1687
1688 do {
1689 if (reqs >= max_packed_rw - 1) {
1690 put_back = false;
1691 break;
1692 }
1693
1694 spin_lock_irq(q->queue_lock);
1695 next = blk_fetch_request(q);
1696 spin_unlock_irq(q->queue_lock);
1697 if (!next) {
1698 put_back = false;
1699 break;
1700 }
1701
1702 if (mmc_large_sector(card) &&
1703 !IS_ALIGNED(blk_rq_sectors(next), 8))
1704 break;
1705
1706 if (next->cmd_flags & REQ_DISCARD ||
1707 next->cmd_flags & REQ_FLUSH)
1708 break;
1709
1710 if (rq_data_dir(cur) != rq_data_dir(next))
1711 break;
1712
1713 if (mmc_req_rel_wr(next) &&
1714 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1715 break;
1716
1717 req_sectors += blk_rq_sectors(next);
1718 if (req_sectors > max_blk_count)
1719 break;
1720
1721 phys_segments += next->nr_phys_segments;
1722 if (phys_segments > max_phys_segs)
1723 break;
1724
1725 list_add_tail(&next->queuelist, &mqrq->packed->list);
1726 cur = next;
1727 reqs++;
1728 } while (1);
1729
1730 if (put_back) {
1731 spin_lock_irq(q->queue_lock);
1732 blk_requeue_request(q, next);
1733 spin_unlock_irq(q->queue_lock);
1734 }
1735
1736 if (reqs > 0) {
1737 list_add(&req->queuelist, &mqrq->packed->list);
1738 mqrq->packed->nr_entries = ++reqs;
1739 mqrq->packed->retries = reqs;
1740 return reqs;
1741 }
1742
1743 no_packed:
1744 mqrq->cmd_type = MMC_PACKED_NONE;
1745 return 0;
1746 }
1747
1748 static void mmc_blk_packed_hdr_wrq_prep(struct mmc_queue_req *mqrq,
1749 struct mmc_card *card,
1750 struct mmc_queue *mq)
1751 {
1752 struct mmc_blk_request *brq = &mqrq->brq;
1753 struct request *req = mqrq->req;
1754 struct request *prq;
1755 struct mmc_blk_data *md = mq->data;
1756 struct mmc_packed *packed = mqrq->packed;
1757 bool do_rel_wr, do_data_tag;
1758 __le32 *packed_cmd_hdr;
1759 u8 hdr_blocks;
1760 u8 i = 1;
1761
1762 BUG_ON(!packed);
1763
1764 mqrq->cmd_type = MMC_PACKED_WRITE;
1765 packed->blocks = 0;
1766 packed->idx_failure = MMC_PACKED_NR_IDX;
1767
1768 packed_cmd_hdr = packed->cmd_hdr;
1769 memset(packed_cmd_hdr, 0, sizeof(packed->cmd_hdr));
1770 packed_cmd_hdr[0] = cpu_to_le32((packed->nr_entries << 16) |
1771 (PACKED_CMD_WR << 8) | PACKED_CMD_VER);
1772 hdr_blocks = mmc_large_sector(card) ? 8 : 1;
1773
1774 /*
1775 * Argument for each entry of packed group
1776 */
1777 list_for_each_entry(prq, &packed->list, queuelist) {
1778 do_rel_wr = mmc_req_rel_wr(prq) && (md->flags & MMC_BLK_REL_WR);
1779 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1780 (prq->cmd_flags & REQ_META) &&
1781 (rq_data_dir(prq) == WRITE) &&
1782 ((brq->data.blocks * brq->data.blksz) >=
1783 card->ext_csd.data_tag_unit_size);
1784 /* Argument of CMD23 */
1785 packed_cmd_hdr[(i * 2)] = cpu_to_le32(
1786 (do_rel_wr ? MMC_CMD23_ARG_REL_WR : 0) |
1787 (do_data_tag ? MMC_CMD23_ARG_TAG_REQ : 0) |
1788 blk_rq_sectors(prq));
1789 /* Argument of CMD18 or CMD25 */
1790 packed_cmd_hdr[((i * 2)) + 1] = cpu_to_le32(
1791 mmc_card_blockaddr(card) ?
1792 blk_rq_pos(prq) : blk_rq_pos(prq) << 9);
1793 packed->blocks += blk_rq_sectors(prq);
1794 i++;
1795 }
1796
1797 memset(brq, 0, sizeof(struct mmc_blk_request));
1798 brq->mrq.cmd = &brq->cmd;
1799 brq->mrq.data = &brq->data;
1800 brq->mrq.sbc = &brq->sbc;
1801 brq->mrq.stop = &brq->stop;
1802
1803 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1804 brq->sbc.arg = MMC_CMD23_ARG_PACKED | (packed->blocks + hdr_blocks);
1805 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1806
1807 brq->cmd.opcode = MMC_WRITE_MULTIPLE_BLOCK;
1808 brq->cmd.arg = blk_rq_pos(req);
1809 if (!mmc_card_blockaddr(card))
1810 brq->cmd.arg <<= 9;
1811 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1812
1813 brq->data.blksz = 512;
1814 brq->data.blocks = packed->blocks + hdr_blocks;
1815 brq->data.flags |= MMC_DATA_WRITE;
1816
1817 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1818 brq->stop.arg = 0;
1819 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
1820
1821 mmc_set_data_timeout(&brq->data, card);
1822
1823 brq->data.sg = mqrq->sg;
1824 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1825
1826 mqrq->mmc_active.mrq = &brq->mrq;
1827 mqrq->mmc_active.err_check = mmc_blk_packed_err_check;
1828
1829 mmc_queue_bounce_pre(mqrq);
1830 }
1831
1832 static int mmc_blk_cmd_err(struct mmc_blk_data *md, struct mmc_card *card,
1833 struct mmc_blk_request *brq, struct request *req,
1834 int ret)
1835 {
1836 struct mmc_queue_req *mq_rq;
1837 mq_rq = container_of(brq, struct mmc_queue_req, brq);
1838
1839 /*
1840 * If this is an SD card and we're writing, we can first
1841 * mark the known good sectors as ok.
1842 *
1843 * If the card is not SD, we can still ok written sectors
1844 * as reported by the controller (which might be less than
1845 * the real number of written sectors, but never more).
1846 */
1847 if (mmc_card_sd(card)) {
1848 u32 blocks;
1849
1850 blocks = mmc_sd_num_wr_blocks(card);
1851 if (blocks != (u32)-1) {
1852 ret = blk_end_request(req, 0, blocks << 9);
1853 }
1854 } else {
1855 if (!mmc_packed_cmd(mq_rq->cmd_type))
1856 ret = blk_end_request(req, 0, brq->data.bytes_xfered);
1857 }
1858 return ret;
1859 }
1860
1861 static int mmc_blk_end_packed_req(struct mmc_queue_req *mq_rq)
1862 {
1863 struct request *prq;
1864 struct mmc_packed *packed = mq_rq->packed;
1865 int idx = packed->idx_failure, i = 0;
1866 int ret = 0;
1867
1868 BUG_ON(!packed);
1869
1870 while (!list_empty(&packed->list)) {
1871 prq = list_entry_rq(packed->list.next);
1872 if (idx == i) {
1873 /* retry from error index */
1874 packed->nr_entries -= idx;
1875 mq_rq->req = prq;
1876 ret = 1;
1877
1878 if (packed->nr_entries == MMC_PACKED_NR_SINGLE) {
1879 list_del_init(&prq->queuelist);
1880 mmc_blk_clear_packed(mq_rq);
1881 }
1882 return ret;
1883 }
1884 list_del_init(&prq->queuelist);
1885 blk_end_request(prq, 0, blk_rq_bytes(prq));
1886 i++;
1887 }
1888
1889 mmc_blk_clear_packed(mq_rq);
1890 return ret;
1891 }
1892
1893 static void mmc_blk_abort_packed_req(struct mmc_queue_req *mq_rq)
1894 {
1895 struct request *prq;
1896 struct mmc_packed *packed = mq_rq->packed;
1897
1898 BUG_ON(!packed);
1899
1900 while (!list_empty(&packed->list)) {
1901 prq = list_entry_rq(packed->list.next);
1902 list_del_init(&prq->queuelist);
1903 blk_end_request(prq, -EIO, blk_rq_bytes(prq));
1904 }
1905
1906 mmc_blk_clear_packed(mq_rq);
1907 }
1908
1909 static void mmc_blk_revert_packed_req(struct mmc_queue *mq,
1910 struct mmc_queue_req *mq_rq)
1911 {
1912 struct request *prq;
1913 struct request_queue *q = mq->queue;
1914 struct mmc_packed *packed = mq_rq->packed;
1915
1916 BUG_ON(!packed);
1917
1918 while (!list_empty(&packed->list)) {
1919 prq = list_entry_rq(packed->list.prev);
1920 if (prq->queuelist.prev != &packed->list) {
1921 list_del_init(&prq->queuelist);
1922 spin_lock_irq(q->queue_lock);
1923 blk_requeue_request(mq->queue, prq);
1924 spin_unlock_irq(q->queue_lock);
1925 } else {
1926 list_del_init(&prq->queuelist);
1927 }
1928 }
1929
1930 mmc_blk_clear_packed(mq_rq);
1931 }
1932
1933 static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc)
1934 {
1935 struct mmc_blk_data *md = mq->data;
1936 struct mmc_card *card = md->queue.card;
1937 struct mmc_blk_request *brq = &mq->mqrq_cur->brq;
1938 int ret = 1, disable_multi = 0, retry = 0, type, retune_retry_done = 0;
1939 enum mmc_blk_status status;
1940 struct mmc_queue_req *mq_rq;
1941 struct request *req = rqc;
1942 struct mmc_async_req *areq;
1943 const u8 packed_nr = 2;
1944 u8 reqs = 0;
1945
1946 if (!rqc && !mq->mqrq_prev->req)
1947 return 0;
1948
1949 if (rqc)
1950 reqs = mmc_blk_prep_packed_list(mq, rqc);
1951
1952 do {
1953 if (rqc) {
1954 /*
1955 * When 4KB native sector is enabled, only 8 blocks
1956 * multiple read or write is allowed
1957 */
1958 if ((brq->data.blocks & 0x07) &&
1959 (card->ext_csd.data_sector_size == 4096)) {
1960 pr_err("%s: Transfer size is not 4KB sector size aligned\n",
1961 req->rq_disk->disk_name);
1962 mq_rq = mq->mqrq_cur;
1963 goto cmd_abort;
1964 }
1965
1966 if (reqs >= packed_nr)
1967 mmc_blk_packed_hdr_wrq_prep(mq->mqrq_cur,
1968 card, mq);
1969 else
1970 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
1971 areq = &mq->mqrq_cur->mmc_active;
1972 } else
1973 areq = NULL;
1974 areq = mmc_start_req(card->host, areq, (int *) &status);
1975 if (!areq) {
1976 if (status == MMC_BLK_NEW_REQUEST)
1977 mq->flags |= MMC_QUEUE_NEW_REQUEST;
1978 return 0;
1979 }
1980
1981 mq_rq = container_of(areq, struct mmc_queue_req, mmc_active);
1982 brq = &mq_rq->brq;
1983 req = mq_rq->req;
1984 type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
1985 mmc_queue_bounce_post(mq_rq);
1986
1987 switch (status) {
1988 case MMC_BLK_SUCCESS:
1989 case MMC_BLK_PARTIAL:
1990 /*
1991 * A block was successfully transferred.
1992 */
1993 mmc_blk_reset_success(md, type);
1994
1995 if (mmc_packed_cmd(mq_rq->cmd_type)) {
1996 ret = mmc_blk_end_packed_req(mq_rq);
1997 break;
1998 } else {
1999 ret = blk_end_request(req, 0,
2000 brq->data.bytes_xfered);
2001 }
2002
2003 /*
2004 * If the blk_end_request function returns non-zero even
2005 * though all data has been transferred and no errors
2006 * were returned by the host controller, it's a bug.
2007 */
2008 if (status == MMC_BLK_SUCCESS && ret) {
2009 pr_err("%s BUG rq_tot %d d_xfer %d\n",
2010 __func__, blk_rq_bytes(req),
2011 brq->data.bytes_xfered);
2012 rqc = NULL;
2013 goto cmd_abort;
2014 }
2015 break;
2016 case MMC_BLK_CMD_ERR:
2017 ret = mmc_blk_cmd_err(md, card, brq, req, ret);
2018 if (mmc_blk_reset(md, card->host, type))
2019 goto cmd_abort;
2020 if (!ret)
2021 goto start_new_req;
2022 break;
2023 case MMC_BLK_RETRY:
2024 retune_retry_done = brq->retune_retry_done;
2025 if (retry++ < 5)
2026 break;
2027 /* Fall through */
2028 case MMC_BLK_ABORT:
2029 if (!mmc_blk_reset(md, card->host, type))
2030 break;
2031 goto cmd_abort;
2032 case MMC_BLK_DATA_ERR: {
2033 int err;
2034
2035 err = mmc_blk_reset(md, card->host, type);
2036 if (!err)
2037 break;
2038 if (err == -ENODEV ||
2039 mmc_packed_cmd(mq_rq->cmd_type))
2040 goto cmd_abort;
2041 /* Fall through */
2042 }
2043 case MMC_BLK_ECC_ERR:
2044 if (brq->data.blocks > 1) {
2045 /* Redo read one sector at a time */
2046 pr_warn("%s: retrying using single block read\n",
2047 req->rq_disk->disk_name);
2048 disable_multi = 1;
2049 break;
2050 }
2051 /*
2052 * After an error, we redo I/O one sector at a
2053 * time, so we only reach here after trying to
2054 * read a single sector.
2055 */
2056 ret = blk_end_request(req, -EIO,
2057 brq->data.blksz);
2058 if (!ret)
2059 goto start_new_req;
2060 break;
2061 case MMC_BLK_NOMEDIUM:
2062 goto cmd_abort;
2063 default:
2064 pr_err("%s: Unhandled return value (%d)",
2065 req->rq_disk->disk_name, status);
2066 goto cmd_abort;
2067 }
2068
2069 if (ret) {
2070 if (mmc_packed_cmd(mq_rq->cmd_type)) {
2071 if (!mq_rq->packed->retries)
2072 goto cmd_abort;
2073 mmc_blk_packed_hdr_wrq_prep(mq_rq, card, mq);
2074 mmc_start_req(card->host,
2075 &mq_rq->mmc_active, NULL);
2076 } else {
2077
2078 /*
2079 * In case of a incomplete request
2080 * prepare it again and resend.
2081 */
2082 mmc_blk_rw_rq_prep(mq_rq, card,
2083 disable_multi, mq);
2084 mmc_start_req(card->host,
2085 &mq_rq->mmc_active, NULL);
2086 }
2087 mq_rq->brq.retune_retry_done = retune_retry_done;
2088 }
2089 } while (ret);
2090
2091 return 1;
2092
2093 cmd_abort:
2094 if (mmc_packed_cmd(mq_rq->cmd_type)) {
2095 mmc_blk_abort_packed_req(mq_rq);
2096 } else {
2097 if (mmc_card_removed(card))
2098 req->cmd_flags |= REQ_QUIET;
2099 while (ret)
2100 ret = blk_end_request(req, -EIO,
2101 blk_rq_cur_bytes(req));
2102 }
2103
2104 start_new_req:
2105 if (rqc) {
2106 if (mmc_card_removed(card)) {
2107 rqc->cmd_flags |= REQ_QUIET;
2108 blk_end_request_all(rqc, -EIO);
2109 } else {
2110 /*
2111 * If current request is packed, it needs to put back.
2112 */
2113 if (mmc_packed_cmd(mq->mqrq_cur->cmd_type))
2114 mmc_blk_revert_packed_req(mq, mq->mqrq_cur);
2115
2116 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
2117 mmc_start_req(card->host,
2118 &mq->mqrq_cur->mmc_active, NULL);
2119 }
2120 }
2121
2122 return 0;
2123 }
2124
2125 static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
2126 {
2127 int ret;
2128 struct mmc_blk_data *md = mq->data;
2129 struct mmc_card *card = md->queue.card;
2130 struct mmc_host *host = card->host;
2131 unsigned long flags;
2132 unsigned int cmd_flags = req ? req->cmd_flags : 0;
2133
2134 if (req && !mq->mqrq_prev->req)
2135 /* claim host only for the first request */
2136 mmc_get_card(card);
2137
2138 ret = mmc_blk_part_switch(card, md);
2139 if (ret) {
2140 if (req) {
2141 blk_end_request_all(req, -EIO);
2142 }
2143 ret = 0;
2144 goto out;
2145 }
2146
2147 mq->flags &= ~MMC_QUEUE_NEW_REQUEST;
2148 if (cmd_flags & REQ_DISCARD) {
2149 /* complete ongoing async transfer before issuing discard */
2150 if (card->host->areq)
2151 mmc_blk_issue_rw_rq(mq, NULL);
2152 if (req->cmd_flags & REQ_SECURE)
2153 ret = mmc_blk_issue_secdiscard_rq(mq, req);
2154 else
2155 ret = mmc_blk_issue_discard_rq(mq, req);
2156 } else if (cmd_flags & REQ_FLUSH) {
2157 /* complete ongoing async transfer before issuing flush */
2158 if (card->host->areq)
2159 mmc_blk_issue_rw_rq(mq, NULL);
2160 ret = mmc_blk_issue_flush(mq, req);
2161 } else {
2162 if (!req && host->areq) {
2163 spin_lock_irqsave(&host->context_info.lock, flags);
2164 host->context_info.is_waiting_last_req = true;
2165 spin_unlock_irqrestore(&host->context_info.lock, flags);
2166 }
2167 ret = mmc_blk_issue_rw_rq(mq, req);
2168 }
2169
2170 out:
2171 if ((!req && !(mq->flags & MMC_QUEUE_NEW_REQUEST)) ||
2172 (cmd_flags & MMC_REQ_SPECIAL_MASK))
2173 /*
2174 * Release host when there are no more requests
2175 * and after special request(discard, flush) is done.
2176 * In case sepecial request, there is no reentry to
2177 * the 'mmc_blk_issue_rq' with 'mqrq_prev->req'.
2178 */
2179 mmc_put_card(card);
2180 return ret;
2181 }
2182
2183 static inline int mmc_blk_readonly(struct mmc_card *card)
2184 {
2185 return mmc_card_readonly(card) ||
2186 !(card->csd.cmdclass & CCC_BLOCK_WRITE);
2187 }
2188
2189 static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
2190 struct device *parent,
2191 sector_t size,
2192 bool default_ro,
2193 const char *subname,
2194 int area_type)
2195 {
2196 struct mmc_blk_data *md;
2197 int devidx, ret;
2198
2199 devidx = find_first_zero_bit(dev_use, max_devices);
2200 if (devidx >= max_devices)
2201 return ERR_PTR(-ENOSPC);
2202 __set_bit(devidx, dev_use);
2203
2204 md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL);
2205 if (!md) {
2206 ret = -ENOMEM;
2207 goto out;
2208 }
2209
2210 /*
2211 * !subname implies we are creating main mmc_blk_data that will be
2212 * associated with mmc_card with dev_set_drvdata. Due to device
2213 * partitions, devidx will not coincide with a per-physical card
2214 * index anymore so we keep track of a name index.
2215 */
2216 if (!subname) {
2217 md->name_idx = find_first_zero_bit(name_use, max_devices);
2218 __set_bit(md->name_idx, name_use);
2219 } else
2220 md->name_idx = ((struct mmc_blk_data *)
2221 dev_to_disk(parent)->private_data)->name_idx;
2222
2223 md->area_type = area_type;
2224
2225 /*
2226 * Set the read-only status based on the supported commands
2227 * and the write protect switch.
2228 */
2229 md->read_only = mmc_blk_readonly(card);
2230
2231 md->disk = alloc_disk(perdev_minors);
2232 if (md->disk == NULL) {
2233 ret = -ENOMEM;
2234 goto err_kfree;
2235 }
2236
2237 spin_lock_init(&md->lock);
2238 INIT_LIST_HEAD(&md->part);
2239 md->usage = 1;
2240
2241 ret = mmc_init_queue(&md->queue, card, &md->lock, subname);
2242 if (ret)
2243 goto err_putdisk;
2244
2245 md->queue.issue_fn = mmc_blk_issue_rq;
2246 md->queue.data = md;
2247
2248 md->disk->major = MMC_BLOCK_MAJOR;
2249 md->disk->first_minor = devidx * perdev_minors;
2250 md->disk->fops = &mmc_bdops;
2251 md->disk->private_data = md;
2252 md->disk->queue = md->queue.queue;
2253 md->disk->driverfs_dev = parent;
2254 set_disk_ro(md->disk, md->read_only || default_ro);
2255 if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT))
2256 md->disk->flags |= GENHD_FL_NO_PART_SCAN;
2257
2258 /*
2259 * As discussed on lkml, GENHD_FL_REMOVABLE should:
2260 *
2261 * - be set for removable media with permanent block devices
2262 * - be unset for removable block devices with permanent media
2263 *
2264 * Since MMC block devices clearly fall under the second
2265 * case, we do not set GENHD_FL_REMOVABLE. Userspace
2266 * should use the block device creation/destruction hotplug
2267 * messages to tell when the card is present.
2268 */
2269
2270 snprintf(md->disk->disk_name, sizeof(md->disk->disk_name),
2271 "mmcblk%u%s", md->name_idx, subname ? subname : "");
2272
2273 if (mmc_card_mmc(card))
2274 blk_queue_logical_block_size(md->queue.queue,
2275 card->ext_csd.data_sector_size);
2276 else
2277 blk_queue_logical_block_size(md->queue.queue, 512);
2278
2279 set_capacity(md->disk, size);
2280
2281 if (mmc_host_cmd23(card->host)) {
2282 if ((mmc_card_mmc(card) &&
2283 card->csd.mmca_vsn >= CSD_SPEC_VER_3) ||
2284 (mmc_card_sd(card) &&
2285 card->scr.cmds & SD_SCR_CMD23_SUPPORT))
2286 md->flags |= MMC_BLK_CMD23;
2287 }
2288
2289 if (mmc_card_mmc(card) &&
2290 md->flags & MMC_BLK_CMD23 &&
2291 ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) ||
2292 card->ext_csd.rel_sectors)) {
2293 md->flags |= MMC_BLK_REL_WR;
2294 blk_queue_flush(md->queue.queue, REQ_FLUSH | REQ_FUA);
2295 }
2296
2297 if (mmc_card_mmc(card) &&
2298 (area_type == MMC_BLK_DATA_AREA_MAIN) &&
2299 (md->flags & MMC_BLK_CMD23) &&
2300 card->ext_csd.packed_event_en) {
2301 if (!mmc_packed_init(&md->queue, card))
2302 md->flags |= MMC_BLK_PACKED_CMD;
2303 }
2304
2305 return md;
2306
2307 err_putdisk:
2308 put_disk(md->disk);
2309 err_kfree:
2310 kfree(md);
2311 out:
2312 return ERR_PTR(ret);
2313 }
2314
2315 static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
2316 {
2317 sector_t size;
2318
2319 if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) {
2320 /*
2321 * The EXT_CSD sector count is in number or 512 byte
2322 * sectors.
2323 */
2324 size = card->ext_csd.sectors;
2325 } else {
2326 /*
2327 * The CSD capacity field is in units of read_blkbits.
2328 * set_capacity takes units of 512 bytes.
2329 */
2330 size = (typeof(sector_t))card->csd.capacity
2331 << (card->csd.read_blkbits - 9);
2332 }
2333
2334 return mmc_blk_alloc_req(card, &card->dev, size, false, NULL,
2335 MMC_BLK_DATA_AREA_MAIN);
2336 }
2337
2338 static int mmc_blk_alloc_part(struct mmc_card *card,
2339 struct mmc_blk_data *md,
2340 unsigned int part_type,
2341 sector_t size,
2342 bool default_ro,
2343 const char *subname,
2344 int area_type)
2345 {
2346 char cap_str[10];
2347 struct mmc_blk_data *part_md;
2348
2349 part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro,
2350 subname, area_type);
2351 if (IS_ERR(part_md))
2352 return PTR_ERR(part_md);
2353 part_md->part_type = part_type;
2354 list_add(&part_md->part, &md->part);
2355
2356 string_get_size((u64)get_capacity(part_md->disk), 512, STRING_UNITS_2,
2357 cap_str, sizeof(cap_str));
2358 pr_info("%s: %s %s partition %u %s\n",
2359 part_md->disk->disk_name, mmc_card_id(card),
2360 mmc_card_name(card), part_md->part_type, cap_str);
2361 return 0;
2362 }
2363
2364 /* MMC Physical partitions consist of two boot partitions and
2365 * up to four general purpose partitions.
2366 * For each partition enabled in EXT_CSD a block device will be allocatedi
2367 * to provide access to the partition.
2368 */
2369
2370 static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md)
2371 {
2372 int idx, ret = 0;
2373
2374 if (!mmc_card_mmc(card))
2375 return 0;
2376
2377 for (idx = 0; idx < card->nr_parts; idx++) {
2378 if (card->part[idx].size) {
2379 ret = mmc_blk_alloc_part(card, md,
2380 card->part[idx].part_cfg,
2381 card->part[idx].size >> 9,
2382 card->part[idx].force_ro,
2383 card->part[idx].name,
2384 card->part[idx].area_type);
2385 if (ret)
2386 return ret;
2387 }
2388 }
2389
2390 return ret;
2391 }
2392
2393 static void mmc_blk_remove_req(struct mmc_blk_data *md)
2394 {
2395 struct mmc_card *card;
2396
2397 if (md) {
2398 /*
2399 * Flush remaining requests and free queues. It
2400 * is freeing the queue that stops new requests
2401 * from being accepted.
2402 */
2403 card = md->queue.card;
2404 mmc_cleanup_queue(&md->queue);
2405 if (md->flags & MMC_BLK_PACKED_CMD)
2406 mmc_packed_clean(&md->queue);
2407 if (md->disk->flags & GENHD_FL_UP) {
2408 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2409 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2410 card->ext_csd.boot_ro_lockable)
2411 device_remove_file(disk_to_dev(md->disk),
2412 &md->power_ro_lock);
2413
2414 del_gendisk(md->disk);
2415 }
2416 mmc_blk_put(md);
2417 }
2418 }
2419
2420 static void mmc_blk_remove_parts(struct mmc_card *card,
2421 struct mmc_blk_data *md)
2422 {
2423 struct list_head *pos, *q;
2424 struct mmc_blk_data *part_md;
2425
2426 __clear_bit(md->name_idx, name_use);
2427 list_for_each_safe(pos, q, &md->part) {
2428 part_md = list_entry(pos, struct mmc_blk_data, part);
2429 list_del(pos);
2430 mmc_blk_remove_req(part_md);
2431 }
2432 }
2433
2434 static int mmc_add_disk(struct mmc_blk_data *md)
2435 {
2436 int ret;
2437 struct mmc_card *card = md->queue.card;
2438
2439 add_disk(md->disk);
2440 md->force_ro.show = force_ro_show;
2441 md->force_ro.store = force_ro_store;
2442 sysfs_attr_init(&md->force_ro.attr);
2443 md->force_ro.attr.name = "force_ro";
2444 md->force_ro.attr.mode = S_IRUGO | S_IWUSR;
2445 ret = device_create_file(disk_to_dev(md->disk), &md->force_ro);
2446 if (ret)
2447 goto force_ro_fail;
2448
2449 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2450 card->ext_csd.boot_ro_lockable) {
2451 umode_t mode;
2452
2453 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS)
2454 mode = S_IRUGO;
2455 else
2456 mode = S_IRUGO | S_IWUSR;
2457
2458 md->power_ro_lock.show = power_ro_lock_show;
2459 md->power_ro_lock.store = power_ro_lock_store;
2460 sysfs_attr_init(&md->power_ro_lock.attr);
2461 md->power_ro_lock.attr.mode = mode;
2462 md->power_ro_lock.attr.name =
2463 "ro_lock_until_next_power_on";
2464 ret = device_create_file(disk_to_dev(md->disk),
2465 &md->power_ro_lock);
2466 if (ret)
2467 goto power_ro_lock_fail;
2468 }
2469 return ret;
2470
2471 power_ro_lock_fail:
2472 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2473 force_ro_fail:
2474 del_gendisk(md->disk);
2475
2476 return ret;
2477 }
2478
2479 #define CID_MANFID_SANDISK 0x2
2480 #define CID_MANFID_TOSHIBA 0x11
2481 #define CID_MANFID_MICRON 0x13
2482 #define CID_MANFID_SAMSUNG 0x15
2483 #define CID_MANFID_KINGSTON 0x70
2484
2485 static const struct mmc_fixup blk_fixups[] =
2486 {
2487 MMC_FIXUP("SEM02G", CID_MANFID_SANDISK, 0x100, add_quirk,
2488 MMC_QUIRK_INAND_CMD38),
2489 MMC_FIXUP("SEM04G", CID_MANFID_SANDISK, 0x100, add_quirk,
2490 MMC_QUIRK_INAND_CMD38),
2491 MMC_FIXUP("SEM08G", CID_MANFID_SANDISK, 0x100, add_quirk,
2492 MMC_QUIRK_INAND_CMD38),
2493 MMC_FIXUP("SEM16G", CID_MANFID_SANDISK, 0x100, add_quirk,
2494 MMC_QUIRK_INAND_CMD38),
2495 MMC_FIXUP("SEM32G", CID_MANFID_SANDISK, 0x100, add_quirk,
2496 MMC_QUIRK_INAND_CMD38),
2497
2498 /*
2499 * Some MMC cards experience performance degradation with CMD23
2500 * instead of CMD12-bounded multiblock transfers. For now we'll
2501 * black list what's bad...
2502 * - Certain Toshiba cards.
2503 *
2504 * N.B. This doesn't affect SD cards.
2505 */
2506 MMC_FIXUP("SDMB-32", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
2507 MMC_QUIRK_BLK_NO_CMD23),
2508 MMC_FIXUP("SDM032", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
2509 MMC_QUIRK_BLK_NO_CMD23),
2510 MMC_FIXUP("MMC08G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2511 MMC_QUIRK_BLK_NO_CMD23),
2512 MMC_FIXUP("MMC16G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2513 MMC_QUIRK_BLK_NO_CMD23),
2514 MMC_FIXUP("MMC32G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2515 MMC_QUIRK_BLK_NO_CMD23),
2516
2517 /*
2518 * Some MMC cards need longer data read timeout than indicated in CSD.
2519 */
2520 MMC_FIXUP(CID_NAME_ANY, CID_MANFID_MICRON, 0x200, add_quirk_mmc,
2521 MMC_QUIRK_LONG_READ_TIME),
2522 MMC_FIXUP("008GE0", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2523 MMC_QUIRK_LONG_READ_TIME),
2524
2525 /*
2526 * On these Samsung MoviNAND parts, performing secure erase or
2527 * secure trim can result in unrecoverable corruption due to a
2528 * firmware bug.
2529 */
2530 MMC_FIXUP("M8G2FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2531 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2532 MMC_FIXUP("MAG4FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2533 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2534 MMC_FIXUP("MBG8FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2535 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2536 MMC_FIXUP("MCGAFA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2537 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2538 MMC_FIXUP("VAL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2539 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2540 MMC_FIXUP("VYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2541 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2542 MMC_FIXUP("KYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2543 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2544 MMC_FIXUP("VZL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2545 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2546
2547 /*
2548 * On Some Kingston eMMCs, performing trim can result in
2549 * unrecoverable data conrruption occasionally due to a firmware bug.
2550 */
2551 MMC_FIXUP("V10008", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
2552 MMC_QUIRK_TRIM_BROKEN),
2553 MMC_FIXUP("V10016", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
2554 MMC_QUIRK_TRIM_BROKEN),
2555
2556 END_FIXUP
2557 };
2558
2559 static int mmc_blk_probe(struct mmc_card *card)
2560 {
2561 struct mmc_blk_data *md, *part_md;
2562 char cap_str[10];
2563
2564 /*
2565 * Check that the card supports the command class(es) we need.
2566 */
2567 if (!(card->csd.cmdclass & CCC_BLOCK_READ))
2568 return -ENODEV;
2569
2570 mmc_fixup_device(card, blk_fixups);
2571
2572 md = mmc_blk_alloc(card);
2573 if (IS_ERR(md))
2574 return PTR_ERR(md);
2575
2576 string_get_size((u64)get_capacity(md->disk), 512, STRING_UNITS_2,
2577 cap_str, sizeof(cap_str));
2578 pr_info("%s: %s %s %s %s\n",
2579 md->disk->disk_name, mmc_card_id(card), mmc_card_name(card),
2580 cap_str, md->read_only ? "(ro)" : "");
2581
2582 if (mmc_blk_alloc_parts(card, md))
2583 goto out;
2584
2585 dev_set_drvdata(&card->dev, md);
2586
2587 if (mmc_add_disk(md))
2588 goto out;
2589
2590 list_for_each_entry(part_md, &md->part, part) {
2591 if (mmc_add_disk(part_md))
2592 goto out;
2593 }
2594
2595 pm_runtime_set_autosuspend_delay(&card->dev, 3000);
2596 pm_runtime_use_autosuspend(&card->dev);
2597
2598 /*
2599 * Don't enable runtime PM for SD-combo cards here. Leave that
2600 * decision to be taken during the SDIO init sequence instead.
2601 */
2602 if (card->type != MMC_TYPE_SD_COMBO) {
2603 pm_runtime_set_active(&card->dev);
2604 pm_runtime_enable(&card->dev);
2605 }
2606
2607 return 0;
2608
2609 out:
2610 mmc_blk_remove_parts(card, md);
2611 mmc_blk_remove_req(md);
2612 return 0;
2613 }
2614
2615 static void mmc_blk_remove(struct mmc_card *card)
2616 {
2617 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
2618
2619 mmc_blk_remove_parts(card, md);
2620 pm_runtime_get_sync(&card->dev);
2621 mmc_claim_host(card->host);
2622 mmc_blk_part_switch(card, md);
2623 mmc_release_host(card->host);
2624 if (card->type != MMC_TYPE_SD_COMBO)
2625 pm_runtime_disable(&card->dev);
2626 pm_runtime_put_noidle(&card->dev);
2627 mmc_blk_remove_req(md);
2628 dev_set_drvdata(&card->dev, NULL);
2629 }
2630
2631 static int _mmc_blk_suspend(struct mmc_card *card)
2632 {
2633 struct mmc_blk_data *part_md;
2634 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
2635
2636 if (md) {
2637 mmc_queue_suspend(&md->queue);
2638 list_for_each_entry(part_md, &md->part, part) {
2639 mmc_queue_suspend(&part_md->queue);
2640 }
2641 }
2642 return 0;
2643 }
2644
2645 static void mmc_blk_shutdown(struct mmc_card *card)
2646 {
2647 _mmc_blk_suspend(card);
2648 }
2649
2650 #ifdef CONFIG_PM_SLEEP
2651 static int mmc_blk_suspend(struct device *dev)
2652 {
2653 struct mmc_card *card = mmc_dev_to_card(dev);
2654
2655 return _mmc_blk_suspend(card);
2656 }
2657
2658 static int mmc_blk_resume(struct device *dev)
2659 {
2660 struct mmc_blk_data *part_md;
2661 struct mmc_blk_data *md = dev_get_drvdata(dev);
2662
2663 if (md) {
2664 /*
2665 * Resume involves the card going into idle state,
2666 * so current partition is always the main one.
2667 */
2668 md->part_curr = md->part_type;
2669 mmc_queue_resume(&md->queue);
2670 list_for_each_entry(part_md, &md->part, part) {
2671 mmc_queue_resume(&part_md->queue);
2672 }
2673 }
2674 return 0;
2675 }
2676 #endif
2677
2678 static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops, mmc_blk_suspend, mmc_blk_resume);
2679
2680 static struct mmc_driver mmc_driver = {
2681 .drv = {
2682 .name = "mmcblk",
2683 .pm = &mmc_blk_pm_ops,
2684 },
2685 .probe = mmc_blk_probe,
2686 .remove = mmc_blk_remove,
2687 .shutdown = mmc_blk_shutdown,
2688 };
2689
2690 static int __init mmc_blk_init(void)
2691 {
2692 int res;
2693
2694 if (perdev_minors != CONFIG_MMC_BLOCK_MINORS)
2695 pr_info("mmcblk: using %d minors per device\n", perdev_minors);
2696
2697 max_devices = min(MAX_DEVICES, (1 << MINORBITS) / perdev_minors);
2698
2699 res = register_blkdev(MMC_BLOCK_MAJOR, "mmc");
2700 if (res)
2701 goto out;
2702
2703 res = mmc_register_driver(&mmc_driver);
2704 if (res)
2705 goto out2;
2706
2707 return 0;
2708 out2:
2709 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
2710 out:
2711 return res;
2712 }
2713
2714 static void __exit mmc_blk_exit(void)
2715 {
2716 mmc_unregister_driver(&mmc_driver);
2717 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
2718 }
2719
2720 module_init(mmc_blk_init);
2721 module_exit(mmc_blk_exit);
2722
2723 MODULE_LICENSE("GPL");
2724 MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver");
2725
Linux with added FPC-III support