projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
mmc: block: Respect hw busy detection in card_busy_detect()
[linux-2.6-block.git] / drivers / mmc / card / block.c
CommitLineData
1da177e4
LT		 1/*
2 * Block driver for media (i.e., flash cards)
3 *
4 * Copyright 2002 Hewlett-Packard Company
979ce720 5 * Copyright 2005-2008 Pierre Ossman
1da177e4
LT		 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
1da177e4
LT		 24#include <linux/kernel.h>
25#include <linux/fs.h>
5a0e3ad6 26#include <linux/slab.h>
1da177e4
LT		 27#include <linux/errno.h>
28#include <linux/hdreg.h>
29#include <linux/kdev_t.h>
30#include <linux/blkdev.h>
a621aaed 31#include <linux/mutex.h>
ec5a19dd 32#include <linux/scatterlist.h>
a7bbb573 33#include <linux/string_helpers.h>
cb87ea28
JC		 34#include <linux/delay.h>
35#include <linux/capability.h>
36#include <linux/compat.h>
e94cfef6 37#include <linux/pm_runtime.h>
1da177e4 38
cb87ea28 39#include <linux/mmc/ioctl.h>
1da177e4 40#include <linux/mmc/card.h>
385e3227 41#include <linux/mmc/host.h>
da7fbe58
PO		 42#include <linux/mmc/mmc.h>
43#include <linux/mmc/sd.h>
1da177e4 44
1da177e4
LT		 45#include <asm/uaccess.h>
46
98ac2162 47#include "queue.h"
1da177e4 48
6b0b6285 49MODULE_ALIAS("mmc:block");
5e71b7a6
OJ		 50#ifdef MODULE_PARAM_PREFIX
51#undef MODULE_PARAM_PREFIX
52#endif
53#define MODULE_PARAM_PREFIX "mmcblk."
54
6a7a6b45
AW		 55#define INAND_CMD38_ARG_EXT_CSD 113
56#define INAND_CMD38_ARG_ERASE 0x00
57#define INAND_CMD38_ARG_TRIM 0x01
58#define INAND_CMD38_ARG_SECERASE 0x80
59#define INAND_CMD38_ARG_SECTRIM1 0x81
60#define INAND_CMD38_ARG_SECTRIM2 0x88
8fee476b 61#define MMC_BLK_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */
775a9362
ME		 62#define MMC_SANITIZE_REQ_TIMEOUT 240000
63#define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16)
6a7a6b45 64
ce39f9d1
SJ		 65#define mmc_req_rel_wr(req) (((req->cmd_flags & REQ_FUA) || \
66 (req->cmd_flags & REQ_META)) && \
67 (rq_data_dir(req) == WRITE))
68#define PACKED_CMD_VER 0x01
69#define PACKED_CMD_WR 0x02
70
5e71b7a6 71static DEFINE_MUTEX(block_mutex);
6b0b6285 72
1da177e4 73/*
5e71b7a6
OJ		 74 * The defaults come from config options but can be overriden by module
75 * or bootarg options.
1da177e4 76 */
5e71b7a6 77static int perdev_minors = CONFIG_MMC_BLOCK_MINORS;
1dff3144 78
5e71b7a6
OJ		 79/*
80 * We've only got one major, so number of mmcblk devices is
81 * limited to 256 / number of minors per device.
82 */
83static int max_devices;
84
85/* 256 minors, so at most 256 separate devices */
86static DECLARE_BITMAP(dev_use, 256);
f06c9153 87static DECLARE_BITMAP(name_use, 256);
1da177e4 88
1da177e4
LT		 89/*
90 * There is one mmc_blk_data per slot.
91 */
92struct mmc_blk_data {
93 spinlock_t lock;
94 struct gendisk *disk;
95 struct mmc_queue queue;
371a689f 96 struct list_head part;
1da177e4 97
d0c97cfb
AW		 98 unsigned int flags;
99#define MMC_BLK_CMD23 (1 << 0) /* Can do SET_BLOCK_COUNT for multiblock */
100#define MMC_BLK_REL_WR (1 << 1) /* MMC Reliable write support */
ce39f9d1 101#define MMC_BLK_PACKED_CMD (1 << 2) /* MMC packed command support */
d0c97cfb 102
1da177e4 103 unsigned int usage;
a6f6c96b 104 unsigned int read_only;
371a689f 105 unsigned int part_type;
f06c9153 106 unsigned int name_idx;
67716327
AH		 107 unsigned int reset_done;
108#define MMC_BLK_READ BIT(0)
109#define MMC_BLK_WRITE BIT(1)
110#define MMC_BLK_DISCARD BIT(2)
111#define MMC_BLK_SECDISCARD BIT(3)
371a689f
AW		 112
113 /*
114 * Only set in main mmc_blk_data associated
115 * with mmc_card with mmc_set_drvdata, and keeps
116 * track of the current selected device partition.
117 */
118 unsigned int part_curr;
119 struct device_attribute force_ro;
add710ea
JR		 120 struct device_attribute power_ro_lock;
121 int area_type;
1da177e4
LT		 122};
123
a621aaed 124static DEFINE_MUTEX(open_lock);
1da177e4 125
ce39f9d1
SJ		 126enum {
127 MMC_PACKED_NR_IDX = -1,
128 MMC_PACKED_NR_ZERO,
129 MMC_PACKED_NR_SINGLE,
130};
131
5e71b7a6
OJ		 132module_param(perdev_minors, int, 0444);
133MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device");
134
8d1e977d
LP		 135static inline int mmc_blk_part_switch(struct mmc_card *card,
136 struct mmc_blk_data *md);
137static int get_card_status(struct mmc_card *card, u32 *status, int retries);
138
ce39f9d1
SJ		 139static inline void mmc_blk_clear_packed(struct mmc_queue_req *mqrq)
140{
141 struct mmc_packed *packed = mqrq->packed;
142
143 BUG_ON(!packed);
144
145 mqrq->cmd_type = MMC_PACKED_NONE;
146 packed->nr_entries = MMC_PACKED_NR_ZERO;
147 packed->idx_failure = MMC_PACKED_NR_IDX;
148 packed->retries = 0;
149 packed->blocks = 0;
150}
151
1da177e4
LT		 152static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk)
153{
154 struct mmc_blk_data *md;
155
a621aaed 156 mutex_lock(&open_lock);
1da177e4
LT		 157 md = disk->private_data;
158 if (md && md->usage == 0)
159 md = NULL;
160 if (md)
161 md->usage++;
a621aaed 162 mutex_unlock(&open_lock);
1da177e4
LT		 163
164 return md;
165}
166
371a689f
AW		 167static inline int mmc_get_devidx(struct gendisk *disk)
168{
169 int devmaj = MAJOR(disk_devt(disk));
170 int devidx = MINOR(disk_devt(disk)) / perdev_minors;
171
172 if (!devmaj)
173 devidx = disk->first_minor / perdev_minors;
174 return devidx;
175}
176
1da177e4
LT		 177static void mmc_blk_put(struct mmc_blk_data *md)
178{
a621aaed 179 mutex_lock(&open_lock);
1da177e4
LT		 180 md->usage--;
181 if (md->usage == 0) {
371a689f 182 int devidx = mmc_get_devidx(md->disk);
5fa83ce2
AH		 183 blk_cleanup_queue(md->queue.queue);
184
1dff3144
DW		 185 __clear_bit(devidx, dev_use);
186
1da177e4 187 put_disk(md->disk);
1da177e4
LT		 188 kfree(md);
189 }
a621aaed 190 mutex_unlock(&open_lock);
1da177e4
LT		 191}
192
add710ea
JR		 193static ssize_t power_ro_lock_show(struct device *dev,
194 struct device_attribute *attr, char *buf)
195{
196 int ret;
197 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
198 struct mmc_card *card = md->queue.card;
199 int locked = 0;
200
201 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PERM_WP_EN)
202 locked = 2;
203 else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN)
204 locked = 1;
205
206 ret = snprintf(buf, PAGE_SIZE, "%d\n", locked);
207
208 return ret;
209}
210
211static ssize_t power_ro_lock_store(struct device *dev,
212 struct device_attribute *attr, const char *buf, size_t count)
213{
214 int ret;
215 struct mmc_blk_data *md, *part_md;
216 struct mmc_card *card;
217 unsigned long set;
218
219 if (kstrtoul(buf, 0, &set))
220 return -EINVAL;
221
222 if (set != 1)
223 return count;
224
225 md = mmc_blk_get(dev_to_disk(dev));
226 card = md->queue.card;
227
e94cfef6 228 mmc_get_card(card);
add710ea
JR		 229
230 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP,
231 card->ext_csd.boot_ro_lock |
232 EXT_CSD_BOOT_WP_B_PWR_WP_EN,
233 card->ext_csd.part_time);
234 if (ret)
235 pr_err("%s: Locking boot partition ro until next power on failed: %d\n", md->disk->disk_name, ret);
236 else
237 card->ext_csd.boot_ro_lock |= EXT_CSD_BOOT_WP_B_PWR_WP_EN;
238
e94cfef6 239 mmc_put_card(card);
add710ea
JR		 240
241 if (!ret) {
242 pr_info("%s: Locking boot partition ro until next power on\n",
243 md->disk->disk_name);
244 set_disk_ro(md->disk, 1);
245
246 list_for_each_entry(part_md, &md->part, part)
247 if (part_md->area_type == MMC_BLK_DATA_AREA_BOOT) {
248 pr_info("%s: Locking boot partition ro until next power on\n", part_md->disk->disk_name);
249 set_disk_ro(part_md->disk, 1);
250 }
251 }
252
253 mmc_blk_put(md);
254 return count;
255}
256
371a689f
AW		 257static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr,
258 char *buf)
259{
260 int ret;
261 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
262
263 ret = snprintf(buf, PAGE_SIZE, "%d",
264 get_disk_ro(dev_to_disk(dev)) ^
265 md->read_only);
266 mmc_blk_put(md);
267 return ret;
268}
269
270static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr,
271 const char *buf, size_t count)
272{
273 int ret;
274 char *end;
275 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
276 unsigned long set = simple_strtoul(buf, &end, 0);
277 if (end == buf) {
278 ret = -EINVAL;
279 goto out;
280 }
281
282 set_disk_ro(dev_to_disk(dev), set || md->read_only);
283 ret = count;
284out:
285 mmc_blk_put(md);
286 return ret;
287}
288
a5a1561f 289static int mmc_blk_open(struct block_device *bdev, fmode_t mode)
1da177e4 290{
a5a1561f 291 struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk);
1da177e4
LT		 292 int ret = -ENXIO;
293
2a48fc0a 294 mutex_lock(&block_mutex);
1da177e4
LT		 295 if (md) {
296 if (md->usage == 2)
a5a1561f 297 check_disk_change(bdev);
1da177e4 298 ret = 0;
a00fc090 299
a5a1561f 300 if ((mode & FMODE_WRITE) && md->read_only) {
70bb0896 301 mmc_blk_put(md);
a00fc090 302 ret = -EROFS;
70bb0896 303 }
1da177e4 304 }
2a48fc0a 305 mutex_unlock(&block_mutex);
1da177e4
LT		 306
307 return ret;
308}
309
db2a144b 310static void mmc_blk_release(struct gendisk *disk, fmode_t mode)
1da177e4 311{
a5a1561f 312 struct mmc_blk_data *md = disk->private_data;
1da177e4 313
2a48fc0a 314 mutex_lock(&block_mutex);
1da177e4 315 mmc_blk_put(md);
2a48fc0a 316 mutex_unlock(&block_mutex);
1da177e4
LT		 317}
318
319static int
a885c8c4 320mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1da177e4 321{
a885c8c4
CH		 322 geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16);
323 geo->heads = 4;
324 geo->sectors = 16;
325 return 0;
1da177e4
LT		 326}
327
cb87ea28
JC		 328struct mmc_blk_ioc_data {
329 struct mmc_ioc_cmd ic;
330 unsigned char *buf;
331 u64 buf_bytes;
332};
333
334static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user(
335 struct mmc_ioc_cmd __user *user)
336{
337 struct mmc_blk_ioc_data *idata;
338 int err;
339
340 idata = kzalloc(sizeof(*idata), GFP_KERNEL);
341 if (!idata) {
342 err = -ENOMEM;
aea253ec 343 goto out;
cb87ea28
JC		 344 }
345
346 if (copy_from_user(&idata->ic, user, sizeof(idata->ic))) {
347 err = -EFAULT;
aea253ec 348 goto idata_err;
cb87ea28
JC		 349 }
350
351 idata->buf_bytes = (u64) idata->ic.blksz * idata->ic.blocks;
352 if (idata->buf_bytes > MMC_IOC_MAX_BYTES) {
353 err = -EOVERFLOW;
aea253ec 354 goto idata_err;
cb87ea28
JC		 355 }
356
4d6144de
JR		 357 if (!idata->buf_bytes)
358 return idata;
359
cb87ea28
JC		 360 idata->buf = kzalloc(idata->buf_bytes, GFP_KERNEL);
361 if (!idata->buf) {
362 err = -ENOMEM;
aea253ec 363 goto idata_err;
cb87ea28
JC		 364 }
365
366 if (copy_from_user(idata->buf, (void __user *)(unsigned long)
367 idata->ic.data_ptr, idata->buf_bytes)) {
368 err = -EFAULT;
369 goto copy_err;
370 }
371
372 return idata;
373
374copy_err:
375 kfree(idata->buf);
aea253ec 376idata_err:
cb87ea28 377 kfree(idata);
aea253ec 378out:
cb87ea28 379 return ERR_PTR(err);
cb87ea28
JC		 380}
381
8d1e977d
LP		 382static int ioctl_rpmb_card_status_poll(struct mmc_card *card, u32 *status,
383 u32 retries_max)
384{
385 int err;
386 u32 retry_count = 0;
387
388 if (!status || !retries_max)
389 return -EINVAL;
390
391 do {
392 err = get_card_status(card, status, 5);
393 if (err)
394 break;
395
396 if (!R1_STATUS(*status) &&
397 (R1_CURRENT_STATE(*status) != R1_STATE_PRG))
398 break; /* RPMB programming operation complete */
399
400 /*
401 * Rechedule to give the MMC device a chance to continue
402 * processing the previous command without being polled too
403 * frequently.
404 */
405 usleep_range(1000, 5000);
406 } while (++retry_count < retries_max);
407
408 if (retry_count == retries_max)
409 err = -EPERM;
410
411 return err;
412}
413
775a9362
ME		 414static int ioctl_do_sanitize(struct mmc_card *card)
415{
416 int err;
417
a2d1086d 418 if (!mmc_can_sanitize(card)) {
775a9362
ME		 419 pr_warn("%s: %s - SANITIZE is not supported\n",
420 mmc_hostname(card->host), __func__);
421 err = -EOPNOTSUPP;
422 goto out;
423 }
424
425 pr_debug("%s: %s - SANITIZE IN PROGRESS...\n",
426 mmc_hostname(card->host), __func__);
427
428 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
429 EXT_CSD_SANITIZE_START, 1,
430 MMC_SANITIZE_REQ_TIMEOUT);
431
432 if (err)
433 pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n",
434 mmc_hostname(card->host), __func__, err);
435
436 pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card->host),
437 __func__);
438out:
439 return err;
440}
441
cb87ea28
JC		 442static int mmc_blk_ioctl_cmd(struct block_device *bdev,
443 struct mmc_ioc_cmd __user *ic_ptr)
444{
445 struct mmc_blk_ioc_data *idata;
446 struct mmc_blk_data *md;
447 struct mmc_card *card;
448 struct mmc_command cmd = {0};
449 struct mmc_data data = {0};
ad5fd972 450 struct mmc_request mrq = {NULL};
cb87ea28
JC		 451 struct scatterlist sg;
452 int err;
8d1e977d
LP		 453 int is_rpmb = false;
454 u32 status = 0;
cb87ea28
JC		 455
456 /*
457 * The caller must have CAP_SYS_RAWIO, and must be calling this on the
458 * whole block device, not on a partition. This prevents overspray
459 * between sibling partitions.
460 */
461 if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
462 return -EPERM;
463
464 idata = mmc_blk_ioctl_copy_from_user(ic_ptr);
465 if (IS_ERR(idata))
466 return PTR_ERR(idata);
467
cb87ea28
JC		 468 md = mmc_blk_get(bdev->bd_disk);
469 if (!md) {
470 err = -EINVAL;
1c02f000 471 goto cmd_err;
cb87ea28
JC		 472 }
473
8d1e977d
LP		 474 if (md->area_type & MMC_BLK_DATA_AREA_RPMB)
475 is_rpmb = true;
476
cb87ea28
JC		 477 card = md->queue.card;
478 if (IS_ERR(card)) {
479 err = PTR_ERR(card);
480 goto cmd_done;
481 }
482
4d6144de
JR		 483 cmd.opcode = idata->ic.opcode;
484 cmd.arg = idata->ic.arg;
485 cmd.flags = idata->ic.flags;
486
487 if (idata->buf_bytes) {
488 data.sg = &sg;
489 data.sg_len = 1;
490 data.blksz = idata->ic.blksz;
491 data.blocks = idata->ic.blocks;
492
493 sg_init_one(data.sg, idata->buf, idata->buf_bytes);
494
495 if (idata->ic.write_flag)
496 data.flags = MMC_DATA_WRITE;
497 else
498 data.flags = MMC_DATA_READ;
499
500 /* data.flags must already be set before doing this. */
501 mmc_set_data_timeout(&data, card);
502
503 /* Allow overriding the timeout_ns for empirical tuning. */
504 if (idata->ic.data_timeout_ns)
505 data.timeout_ns = idata->ic.data_timeout_ns;
506
507 if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
508 /*
509 * Pretend this is a data transfer and rely on the
510 * host driver to compute timeout. When all host
511 * drivers support cmd.cmd_timeout for R1B, this
512 * can be changed to:
513 *
514 * mrq.data = NULL;
515 * cmd.cmd_timeout = idata->ic.cmd_timeout_ms;
516 */
517 data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000;
518 }
519
520 mrq.data = &data;
521 }
522
523 mrq.cmd = &cmd;
524
e94cfef6 525 mmc_get_card(card);
cb87ea28 526
8d1e977d
LP		 527 err = mmc_blk_part_switch(card, md);
528 if (err)
529 goto cmd_rel_host;
530
cb87ea28
JC		 531 if (idata->ic.is_acmd) {
532 err = mmc_app_cmd(card->host, card);
533 if (err)
534 goto cmd_rel_host;
535 }
536
8d1e977d
LP		 537 if (is_rpmb) {
538 err = mmc_set_blockcount(card, data.blocks,
539 idata->ic.write_flag & (1 << 31));
540 if (err)
541 goto cmd_rel_host;
542 }
543
a82e484e
YG		 544 if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) &&
545 (cmd.opcode == MMC_SWITCH)) {
775a9362
ME		 546 err = ioctl_do_sanitize(card);
547
548 if (err)
549 pr_err("%s: ioctl_do_sanitize() failed. err = %d",
550 __func__, err);
551
552 goto cmd_rel_host;
553 }
554
cb87ea28
JC		 555 mmc_wait_for_req(card->host, &mrq);
556
557 if (cmd.error) {
558 dev_err(mmc_dev(card->host), "%s: cmd error %d\n",
559 __func__, cmd.error);
560 err = cmd.error;
561 goto cmd_rel_host;
562 }
563 if (data.error) {
564 dev_err(mmc_dev(card->host), "%s: data error %d\n",
565 __func__, data.error);
566 err = data.error;
567 goto cmd_rel_host;
568 }
569
570 /*
571 * According to the SD specs, some commands require a delay after
572 * issuing the command.
573 */
574 if (idata->ic.postsleep_min_us)
575 usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us);
576
577 if (copy_to_user(&(ic_ptr->response), cmd.resp, sizeof(cmd.resp))) {
578 err = -EFAULT;
579 goto cmd_rel_host;
580 }
581
582 if (!idata->ic.write_flag) {
583 if (copy_to_user((void __user *)(unsigned long) idata->ic.data_ptr,
584 idata->buf, idata->buf_bytes)) {
585 err = -EFAULT;
586 goto cmd_rel_host;
587 }
588 }
589
8d1e977d
LP		 590 if (is_rpmb) {
591 /*
592 * Ensure RPMB command has completed by polling CMD13
593 * "Send Status".
594 */
595 err = ioctl_rpmb_card_status_poll(card, &status, 5);
596 if (err)
597 dev_err(mmc_dev(card->host),
598 "%s: Card Status=0x%08X, error %d\n",
599 __func__, status, err);
600 }
601
cb87ea28 602cmd_rel_host:
e94cfef6 603 mmc_put_card(card);
cb87ea28
JC		 604
605cmd_done:
606 mmc_blk_put(md);
1c02f000 607cmd_err:
cb87ea28
JC		 608 kfree(idata->buf);
609 kfree(idata);
610 return err;
611}
612
613static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode,
614 unsigned int cmd, unsigned long arg)
615{
616 int ret = -EINVAL;
617 if (cmd == MMC_IOC_CMD)
618 ret = mmc_blk_ioctl_cmd(bdev, (struct mmc_ioc_cmd __user *)arg);
619 return ret;
620}
621
622#ifdef CONFIG_COMPAT
623static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode,
624 unsigned int cmd, unsigned long arg)
625{
626 return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg));
627}
628#endif
629
83d5cde4 630static const struct block_device_operations mmc_bdops = {
a5a1561f
AV		 631 .open = mmc_blk_open,
632 .release = mmc_blk_release,
a885c8c4 633 .getgeo = mmc_blk_getgeo,
1da177e4 634 .owner = THIS_MODULE,
cb87ea28
JC		 635 .ioctl = mmc_blk_ioctl,
636#ifdef CONFIG_COMPAT
637 .compat_ioctl = mmc_blk_compat_ioctl,
638#endif
1da177e4
LT		 639};
640
371a689f
AW		 641static inline int mmc_blk_part_switch(struct mmc_card *card,
642 struct mmc_blk_data *md)
643{
644 int ret;
645 struct mmc_blk_data *main_md = mmc_get_drvdata(card);
0d7d85ca 646
371a689f
AW		 647 if (main_md->part_curr == md->part_type)
648 return 0;
649
650 if (mmc_card_mmc(card)) {
0d7d85ca
AH		 651 u8 part_config = card->ext_csd.part_config;
652
653 part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
654 part_config |= md->part_type;
371a689f
AW		 655
656 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
0d7d85ca 657 EXT_CSD_PART_CONFIG, part_config,
371a689f
AW		 658 card->ext_csd.part_time);
659 if (ret)
660 return ret;
0d7d85ca
AH		 661
662 card->ext_csd.part_config = part_config;
67716327 663 }
371a689f
AW		 664
665 main_md->part_curr = md->part_type;
666 return 0;
667}
668
ec5a19dd
PO		 669static u32 mmc_sd_num_wr_blocks(struct mmc_card *card)
670{
671 int err;
051913da
BD		 672 u32 result;
673 __be32 *blocks;
ec5a19dd 674
ad5fd972 675 struct mmc_request mrq = {NULL};
1278dba1 676 struct mmc_command cmd = {0};
a61ad2b4 677 struct mmc_data data = {0};
ec5a19dd
PO		 678
679 struct scatterlist sg;
680
ec5a19dd
PO		 681 cmd.opcode = MMC_APP_CMD;
682 cmd.arg = card->rca << 16;
7213d175 683 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
ec5a19dd
PO		 684
685 err = mmc_wait_for_cmd(card->host, &cmd, 0);
7213d175
DB		 686 if (err)
687 return (u32)-1;
688 if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD))
ec5a19dd
PO		 689 return (u32)-1;
690
691 memset(&cmd, 0, sizeof(struct mmc_command));
692
693 cmd.opcode = SD_APP_SEND_NUM_WR_BLKS;
694 cmd.arg = 0;
7213d175 695 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
ec5a19dd 696
ec5a19dd
PO		 697 data.blksz = 4;
698 data.blocks = 1;
699 data.flags = MMC_DATA_READ;
700 data.sg = &sg;
701 data.sg_len = 1;
d380443c 702 mmc_set_data_timeout(&data, card);
ec5a19dd 703
ec5a19dd
PO		 704 mrq.cmd = &cmd;
705 mrq.data = &data;
706
051913da
BD		 707 blocks = kmalloc(4, GFP_KERNEL);
708 if (!blocks)
709 return (u32)-1;
710
711 sg_init_one(&sg, blocks, 4);
ec5a19dd
PO		 712
713 mmc_wait_for_req(card->host, &mrq);
714
051913da
BD		 715 result = ntohl(*blocks);
716 kfree(blocks);
717
17b0429d 718 if (cmd.error || data.error)
051913da 719 result = (u32)-1;
ec5a19dd 720
051913da 721 return result;
ec5a19dd
PO		 722}
723
a01f3ccf
RKAL		 724static int send_stop(struct mmc_card *card, u32 *status)
725{
726 struct mmc_command cmd = {0};
727 int err;
728
729 cmd.opcode = MMC_STOP_TRANSMISSION;
730 cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
731 err = mmc_wait_for_cmd(card->host, &cmd, 5);
732 if (err == 0)
733 *status = cmd.resp[0];
734 return err;
735}
736
0a2d4048 737static int get_card_status(struct mmc_card *card, u32 *status, int retries)
504f191f 738{
1278dba1 739 struct mmc_command cmd = {0};
504f191f
AH		 740 int err;
741
504f191f
AH		 742 cmd.opcode = MMC_SEND_STATUS;
743 if (!mmc_host_is_spi(card->host))
744 cmd.arg = card->rca << 16;
745 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
0a2d4048
RKAL		 746 err = mmc_wait_for_cmd(card->host, &cmd, retries);
747 if (err == 0)
748 *status = cmd.resp[0];
749 return err;
504f191f
AH		 750}
751
c49433fb 752static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms,
95a91298 753 bool hw_busy_detect, struct request *req, int *gen_err)
c49433fb
UH		 754{
755 unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
756 int err = 0;
757 u32 status;
758
759 do {
760 err = get_card_status(card, &status, 5);
761 if (err) {
762 pr_err("%s: error %d requesting status\n",
763 req->rq_disk->disk_name, err);
764 return err;
765 }
766
767 if (status & R1_ERROR) {
768 pr_err("%s: %s: error sending status cmd, status %#x\n",
769 req->rq_disk->disk_name, __func__, status);
770 *gen_err = 1;
771 }
772
95a91298
UH		 773 /* We may rely on the host hw to handle busy detection.*/
774 if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) &&
775 hw_busy_detect)
776 break;
777
c49433fb
UH		 778 /*
779 * Timeout if the device never becomes ready for data and never
780 * leaves the program state.
781 */
782 if (time_after(jiffies, timeout)) {
783 pr_err("%s: Card stuck in programming state! %s %s\n",
784 mmc_hostname(card->host),
785 req->rq_disk->disk_name, __func__);
786 return -ETIMEDOUT;
787 }
788
789 /*
790 * Some cards mishandle the status bits,
791 * so make sure to check both the busy
792 * indication and the card state.
793 */
794 } while (!(status & R1_READY_FOR_DATA) ||
795 (R1_CURRENT_STATE(status) == R1_STATE_PRG));
796
797 return err;
798}
799
a8ad82cc 800#define ERR_NOMEDIUM 3
a01f3ccf
RKAL		 801#define ERR_RETRY 2
802#define ERR_ABORT 1
803#define ERR_CONTINUE 0
804
805static int mmc_blk_cmd_error(struct request *req, const char *name, int error,
806 bool status_valid, u32 status)
807{
808 switch (error) {
809 case -EILSEQ:
810 /* response crc error, retry the r/w cmd */
811 pr_err("%s: %s sending %s command, card status %#x\n",
812 req->rq_disk->disk_name, "response CRC error",
813 name, status);
814 return ERR_RETRY;
815
816 case -ETIMEDOUT:
817 pr_err("%s: %s sending %s command, card status %#x\n",
818 req->rq_disk->disk_name, "timed out", name, status);
819
820 /* If the status cmd initially failed, retry the r/w cmd */
821 if (!status_valid)
822 return ERR_RETRY;
823
824 /*
825 * If it was a r/w cmd crc error, or illegal command
826 * (eg, issued in wrong state) then retry - we should
827 * have corrected the state problem above.
828 */
829 if (status & (R1_COM_CRC_ERROR | R1_ILLEGAL_COMMAND))
830 return ERR_RETRY;
831
832 /* Otherwise abort the command */
833 return ERR_ABORT;
834
835 default:
836 /* We don't understand the error code the driver gave us */
837 pr_err("%s: unknown error %d sending read/write command, card status %#x\n",
838 req->rq_disk->disk_name, error, status);
839 return ERR_ABORT;
840 }
841}
842
843/*
844 * Initial r/w and stop cmd error recovery.
845 * We don't know whether the card received the r/w cmd or not, so try to
846 * restore things back to a sane state. Essentially, we do this as follows:
847 * - Obtain card status. If the first attempt to obtain card status fails,
848 * the status word will reflect the failed status cmd, not the failed
849 * r/w cmd. If we fail to obtain card status, it suggests we can no
850 * longer communicate with the card.
851 * - Check the card state. If the card received the cmd but there was a
852 * transient problem with the response, it might still be in a data transfer
853 * mode. Try to send it a stop command. If this fails, we can't recover.
854 * - If the r/w cmd failed due to a response CRC error, it was probably
855 * transient, so retry the cmd.
856 * - If the r/w cmd timed out, but we didn't get the r/w cmd status, retry.
857 * - If the r/w cmd timed out, and the r/w cmd failed due to CRC error or
858 * illegal cmd, retry.
859 * Otherwise we don't understand what happened, so abort.
860 */
861static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req,
c8760069 862 struct mmc_blk_request *brq, int *ecc_err, int *gen_err)
a01f3ccf
RKAL		 863{
864 bool prev_cmd_status_valid = true;
865 u32 status, stop_status = 0;
866 int err, retry;
867
a8ad82cc
SRT		 868 if (mmc_card_removed(card))
869 return ERR_NOMEDIUM;
870
a01f3ccf
RKAL		 871 /*
872 * Try to get card status which indicates both the card state
873 * and why there was no response. If the first attempt fails,
874 * we can't be sure the returned status is for the r/w command.
875 */
876 for (retry = 2; retry >= 0; retry--) {
877 err = get_card_status(card, &status, 0);
878 if (!err)
879 break;
880
881 prev_cmd_status_valid = false;
882 pr_err("%s: error %d sending status command, %sing\n",
883 req->rq_disk->disk_name, err, retry ? "retry" : "abort");
884 }
885
886 /* We couldn't get a response from the card. Give up. */
a8ad82cc
SRT		 887 if (err) {
888 /* Check if the card is removed */
889 if (mmc_detect_card_removed(card->host))
890 return ERR_NOMEDIUM;
a01f3ccf 891 return ERR_ABORT;
a8ad82cc 892 }
a01f3ccf 893
67716327
AH		 894 /* Flag ECC errors */
895 if ((status & R1_CARD_ECC_FAILED) ||
896 (brq->stop.resp[0] & R1_CARD_ECC_FAILED) ||
897 (brq->cmd.resp[0] & R1_CARD_ECC_FAILED))
898 *ecc_err = 1;
899
c8760069
KY		 900 /* Flag General errors */
901 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ)
902 if ((status & R1_ERROR) ||
903 (brq->stop.resp[0] & R1_ERROR)) {
904 pr_err("%s: %s: general error sending stop or status command, stop cmd response %#x, card status %#x\n",
905 req->rq_disk->disk_name, __func__,
906 brq->stop.resp[0], status);
907 *gen_err = 1;
908 }
909
a01f3ccf
RKAL		 910 /*
911 * Check the current card state. If it is in some data transfer
912 * mode, tell it to stop (and hopefully transition back to TRAN.)
913 */
914 if (R1_CURRENT_STATE(status) == R1_STATE_DATA ||
915 R1_CURRENT_STATE(status) == R1_STATE_RCV) {
916 err = send_stop(card, &stop_status);
917 if (err)
918 pr_err("%s: error %d sending stop command\n",
919 req->rq_disk->disk_name, err);
920
921 /*
922 * If the stop cmd also timed out, the card is probably
923 * not present, so abort. Other errors are bad news too.
924 */
925 if (err)
926 return ERR_ABORT;
67716327
AH		 927 if (stop_status & R1_CARD_ECC_FAILED)
928 *ecc_err = 1;
c8760069
KY		 929 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ)
930 if (stop_status & R1_ERROR) {
931 pr_err("%s: %s: general error sending stop command, stop cmd response %#x\n",
932 req->rq_disk->disk_name, __func__,
933 stop_status);
934 *gen_err = 1;
935 }
a01f3ccf
RKAL		 936 }
937
938 /* Check for set block count errors */
939 if (brq->sbc.error)
940 return mmc_blk_cmd_error(req, "SET_BLOCK_COUNT", brq->sbc.error,
941 prev_cmd_status_valid, status);
942
943 /* Check for r/w command errors */
944 if (brq->cmd.error)
945 return mmc_blk_cmd_error(req, "r/w cmd", brq->cmd.error,
946 prev_cmd_status_valid, status);
947
67716327
AH		 948 /* Data errors */
949 if (!brq->stop.error)
950 return ERR_CONTINUE;
951
a01f3ccf
RKAL		 952 /* Now for stop errors. These aren't fatal to the transfer. */
953 pr_err("%s: error %d sending stop command, original cmd response %#x, card status %#x\n",
954 req->rq_disk->disk_name, brq->stop.error,
955 brq->cmd.resp[0], status);
956
957 /*
958 * Subsitute in our own stop status as this will give the error
959 * state which happened during the execution of the r/w command.
960 */
961 if (stop_status) {
962 brq->stop.resp[0] = stop_status;
963 brq->stop.error = 0;
964 }
965 return ERR_CONTINUE;
966}
967
67716327
AH		 968static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host,
969 int type)
970{
971 int err;
972
973 if (md->reset_done & type)
974 return -EEXIST;
975
976 md->reset_done |= type;
977 err = mmc_hw_reset(host);
978 /* Ensure we switch back to the correct partition */
979 if (err != -EOPNOTSUPP) {
980 struct mmc_blk_data *main_md = mmc_get_drvdata(host->card);
981 int part_err;
982
983 main_md->part_curr = main_md->part_type;
984 part_err = mmc_blk_part_switch(host->card, md);
985 if (part_err) {
986 /*
987 * We have failed to get back into the correct
988 * partition, so we need to abort the whole request.
989 */
990 return -ENODEV;
991 }
992 }
993 return err;
994}
995
996static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type)
997{
998 md->reset_done &= ~type;
999}
1000
bd788c96
AH		 1001static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
1002{
1003 struct mmc_blk_data *md = mq->data;
1004 struct mmc_card *card = md->queue.card;
1005 unsigned int from, nr, arg;
67716327 1006 int err = 0, type = MMC_BLK_DISCARD;
bd788c96 1007
bd788c96
AH		 1008 if (!mmc_can_erase(card)) {
1009 err = -EOPNOTSUPP;
1010 goto out;
1011 }
1012
1013 from = blk_rq_pos(req);
1014 nr = blk_rq_sectors(req);
1015
b3bf9153
KP		 1016 if (mmc_can_discard(card))
1017 arg = MMC_DISCARD_ARG;
1018 else if (mmc_can_trim(card))
bd788c96
AH		 1019 arg = MMC_TRIM_ARG;
1020 else
1021 arg = MMC_ERASE_ARG;
67716327 1022retry:
6a7a6b45
AW		 1023 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1024 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1025 INAND_CMD38_ARG_EXT_CSD,
1026 arg == MMC_TRIM_ARG ?
1027 INAND_CMD38_ARG_TRIM :
1028 INAND_CMD38_ARG_ERASE,
1029 0);
1030 if (err)
1031 goto out;
1032 }
bd788c96
AH		 1033 err = mmc_erase(card, from, nr, arg);
1034out:
67716327
AH		 1035 if (err == -EIO && !mmc_blk_reset(md, card->host, type))
1036 goto retry;
1037 if (!err)
1038 mmc_blk_reset_success(md, type);
ecf8b5d0 1039 blk_end_request(req, err, blk_rq_bytes(req));
bd788c96 1040
bd788c96
AH		 1041 return err ? 0 : 1;
1042}
1043
49804548
AH		 1044static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
1045 struct request *req)
1046{
1047 struct mmc_blk_data *md = mq->data;
1048 struct mmc_card *card = md->queue.card;
775a9362 1049 unsigned int from, nr, arg;
67716327 1050 int err = 0, type = MMC_BLK_SECDISCARD;
49804548 1051
775a9362 1052 if (!(mmc_can_secure_erase_trim(card))) {
49804548
AH		 1053 err = -EOPNOTSUPP;
1054 goto out;
1055 }
1056
28302812
AH		 1057 from = blk_rq_pos(req);
1058 nr = blk_rq_sectors(req);
1059
775a9362
ME		 1060 if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr))
1061 arg = MMC_SECURE_TRIM1_ARG;
1062 else
1063 arg = MMC_SECURE_ERASE_ARG;
d9ddd629 1064
67716327 1065retry:
6a7a6b45
AW		 1066 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1067 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1068 INAND_CMD38_ARG_EXT_CSD,
1069 arg == MMC_SECURE_TRIM1_ARG ?
1070 INAND_CMD38_ARG_SECTRIM1 :
1071 INAND_CMD38_ARG_SECERASE,
1072 0);
1073 if (err)
28302812 1074 goto out_retry;
6a7a6b45 1075 }
28302812 1076
49804548 1077 err = mmc_erase(card, from, nr, arg);
28302812
AH		 1078 if (err == -EIO)
1079 goto out_retry;
1080 if (err)
1081 goto out;
1082
1083 if (arg == MMC_SECURE_TRIM1_ARG) {
6a7a6b45
AW		 1084 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1085 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1086 INAND_CMD38_ARG_EXT_CSD,
1087 INAND_CMD38_ARG_SECTRIM2,
1088 0);
1089 if (err)
28302812 1090 goto out_retry;
6a7a6b45 1091 }
28302812 1092
49804548 1093 err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG);
28302812
AH		 1094 if (err == -EIO)
1095 goto out_retry;
1096 if (err)
1097 goto out;
6a7a6b45 1098 }
28302812 1099
28302812
AH		 1100out_retry:
1101 if (err && !mmc_blk_reset(md, card->host, type))
67716327
AH		 1102 goto retry;
1103 if (!err)
1104 mmc_blk_reset_success(md, type);
28302812 1105out:
ecf8b5d0 1106 blk_end_request(req, err, blk_rq_bytes(req));
49804548 1107
49804548
AH		 1108 return err ? 0 : 1;
1109}
1110
f4c5522b
AW		 1111static int mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req)
1112{
1113 struct mmc_blk_data *md = mq->data;
881d1c25
SJ		 1114 struct mmc_card *card = md->queue.card;
1115 int ret = 0;
1116
1117 ret = mmc_flush_cache(card);
1118 if (ret)
1119 ret = -EIO;
f4c5522b 1120
ecf8b5d0 1121 blk_end_request_all(req, ret);
f4c5522b 1122
881d1c25 1123 return ret ? 0 : 1;
f4c5522b
AW		 1124}
1125
1126/*
1127 * Reformat current write as a reliable write, supporting
1128 * both legacy and the enhanced reliable write MMC cards.
1129 * In each transfer we'll handle only as much as a single
1130 * reliable write can handle, thus finish the request in
1131 * partial completions.
1132 */
d0c97cfb
AW		 1133static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq,
1134 struct mmc_card *card,
1135 struct request *req)
f4c5522b 1136{
f4c5522b
AW		 1137 if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) {
1138 /* Legacy mode imposes restrictions on transfers. */
1139 if (!IS_ALIGNED(brq->cmd.arg, card->ext_csd.rel_sectors))
1140 brq->data.blocks = 1;
1141
1142 if (brq->data.blocks > card->ext_csd.rel_sectors)
1143 brq->data.blocks = card->ext_csd.rel_sectors;
1144 else if (brq->data.blocks < card->ext_csd.rel_sectors)
1145 brq->data.blocks = 1;
1146 }
f4c5522b
AW		 1147}
1148
4c2b8f26
RKAL		 1149#define CMD_ERRORS \
1150 (R1_OUT_OF_RANGE | /* Command argument out of range */ \
1151 R1_ADDRESS_ERROR | /* Misaligned address */ \
1152 R1_BLOCK_LEN_ERROR | /* Transferred block length incorrect */\
1153 R1_WP_VIOLATION | /* Tried to write to protected block */ \
1154 R1_CC_ERROR | /* Card controller error */ \
1155 R1_ERROR) /* General/unknown error */
1156
ee8a43a5
PF		 1157static int mmc_blk_err_check(struct mmc_card *card,
1158 struct mmc_async_req *areq)
d78d4a8a 1159{
ee8a43a5
PF		 1160 struct mmc_queue_req *mq_mrq = container_of(areq, struct mmc_queue_req,
1161 mmc_active);
1162 struct mmc_blk_request *brq = &mq_mrq->brq;
1163 struct request *req = mq_mrq->req;
c8760069 1164 int ecc_err = 0, gen_err = 0;
d78d4a8a
PF		 1165
1166 /*
1167 * sbc.error indicates a problem with the set block count
1168 * command. No data will have been transferred.
1169 *
1170 * cmd.error indicates a problem with the r/w command. No
1171 * data will have been transferred.
1172 *
1173 * stop.error indicates a problem with the stop command. Data
1174 * may have been transferred, or may still be transferring.
1175 */
67716327
AH		 1176 if (brq->sbc.error || brq->cmd.error || brq->stop.error ||
1177 brq->data.error) {
c8760069 1178 switch (mmc_blk_cmd_recovery(card, req, brq, &ecc_err, &gen_err)) {
d78d4a8a
PF		 1179 case ERR_RETRY:
1180 return MMC_BLK_RETRY;
1181 case ERR_ABORT:
1182 return MMC_BLK_ABORT;
a8ad82cc
SRT		 1183 case ERR_NOMEDIUM:
1184 return MMC_BLK_NOMEDIUM;
d78d4a8a
PF		 1185 case ERR_CONTINUE:
1186 break;
1187 }
1188 }
1189
1190 /*
1191 * Check for errors relating to the execution of the
1192 * initial command - such as address errors. No data
1193 * has been transferred.
1194 */
1195 if (brq->cmd.resp[0] & CMD_ERRORS) {
1196 pr_err("%s: r/w command failed, status = %#x\n",
1197 req->rq_disk->disk_name, brq->cmd.resp[0]);
1198 return MMC_BLK_ABORT;
1199 }
1200
1201 /*
1202 * Everything else is either success, or a data error of some
1203 * kind. If it was a write, we may have transitioned to
1204 * program mode, which we have to wait for it to complete.
1205 */
1206 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) {
c49433fb 1207 int err;
8fee476b 1208
c8760069
KY		 1209 /* Check stop command response */
1210 if (brq->stop.resp[0] & R1_ERROR) {
1211 pr_err("%s: %s: general error sending stop command, stop cmd response %#x\n",
1212 req->rq_disk->disk_name, __func__,
1213 brq->stop.resp[0]);
1214 gen_err = 1;
1215 }
1216
95a91298
UH		 1217 err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, false, req,
1218 &gen_err);
c49433fb
UH		 1219 if (err)
1220 return MMC_BLK_CMD_ERR;
d78d4a8a
PF		 1221 }
1222
c8760069
KY		 1223 /* if general error occurs, retry the write operation. */
1224 if (gen_err) {
1225 pr_warn("%s: retrying write for general error\n",
1226 req->rq_disk->disk_name);
1227 return MMC_BLK_RETRY;
1228 }
1229
d78d4a8a
PF		 1230 if (brq->data.error) {
1231 pr_err("%s: error %d transferring data, sector %u, nr %u, cmd response %#x, card status %#x\n",
1232 req->rq_disk->disk_name, brq->data.error,
1233 (unsigned)blk_rq_pos(req),
1234 (unsigned)blk_rq_sectors(req),
1235 brq->cmd.resp[0], brq->stop.resp[0]);
1236
1237 if (rq_data_dir(req) == READ) {
67716327
AH		 1238 if (ecc_err)
1239 return MMC_BLK_ECC_ERR;
d78d4a8a
PF		 1240 return MMC_BLK_DATA_ERR;
1241 } else {
1242 return MMC_BLK_CMD_ERR;
1243 }
1244 }
1245
67716327
AH		 1246 if (!brq->data.bytes_xfered)
1247 return MMC_BLK_RETRY;
d78d4a8a 1248
ce39f9d1
SJ		 1249 if (mmc_packed_cmd(mq_mrq->cmd_type)) {
1250 if (unlikely(brq->data.blocks << 9 != brq->data.bytes_xfered))
1251 return MMC_BLK_PARTIAL;
1252 else
1253 return MMC_BLK_SUCCESS;
1254 }
1255
67716327
AH		 1256 if (blk_rq_bytes(req) != brq->data.bytes_xfered)
1257 return MMC_BLK_PARTIAL;
1258
1259 return MMC_BLK_SUCCESS;
d78d4a8a
PF		 1260}
1261
ce39f9d1
SJ		 1262static int mmc_blk_packed_err_check(struct mmc_card *card,
1263 struct mmc_async_req *areq)
1264{
1265 struct mmc_queue_req *mq_rq = container_of(areq, struct mmc_queue_req,
1266 mmc_active);
1267 struct request *req = mq_rq->req;
1268 struct mmc_packed *packed = mq_rq->packed;
1269 int err, check, status;
1270 u8 *ext_csd;
1271
1272 BUG_ON(!packed);
1273
1274 packed->retries--;
1275 check = mmc_blk_err_check(card, areq);
1276 err = get_card_status(card, &status, 0);
1277 if (err) {
1278 pr_err("%s: error %d sending status command\n",
1279 req->rq_disk->disk_name, err);
1280 return MMC_BLK_ABORT;
1281 }
1282
1283 if (status & R1_EXCEPTION_EVENT) {
1284 ext_csd = kzalloc(512, GFP_KERNEL);
1285 if (!ext_csd) {
1286 pr_err("%s: unable to allocate buffer for ext_csd\n",
1287 req->rq_disk->disk_name);
1288 return -ENOMEM;
1289 }
1290
1291 err = mmc_send_ext_csd(card, ext_csd);
1292 if (err) {
1293 pr_err("%s: error %d sending ext_csd\n",
1294 req->rq_disk->disk_name, err);
1295 check = MMC_BLK_ABORT;
1296 goto free;
1297 }
1298
1299 if ((ext_csd[EXT_CSD_EXP_EVENTS_STATUS] &
1300 EXT_CSD_PACKED_FAILURE) &&
1301 (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1302 EXT_CSD_PACKED_GENERIC_ERROR)) {
1303 if (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1304 EXT_CSD_PACKED_INDEXED_ERROR) {
1305 packed->idx_failure =
1306 ext_csd[EXT_CSD_PACKED_FAILURE_INDEX] - 1;
1307 check = MMC_BLK_PARTIAL;
1308 }
1309 pr_err("%s: packed cmd failed, nr %u, sectors %u, "
1310 "failure index: %d\n",
1311 req->rq_disk->disk_name, packed->nr_entries,
1312 packed->blocks, packed->idx_failure);
1313 }
1314free:
1315 kfree(ext_csd);
1316 }
1317
1318 return check;
1319}
1320
54d49d77
PF		 1321static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
1322 struct mmc_card *card,
1323 int disable_multi,
1324 struct mmc_queue *mq)
1da177e4 1325{
54d49d77
PF		 1326 u32 readcmd, writecmd;
1327 struct mmc_blk_request *brq = &mqrq->brq;
1328 struct request *req = mqrq->req;
1da177e4 1329 struct mmc_blk_data *md = mq->data;
4265900e 1330 bool do_data_tag;
1da177e4 1331
f4c5522b
AW		 1332 /*
1333 * Reliable writes are used to implement Forced Unit Access and
1334 * REQ_META accesses, and are supported only on MMCs.
65299a3b
CH		 1335 *
1336 * XXX: this really needs a good explanation of why REQ_META
1337 * is treated special.
f4c5522b
AW		 1338 */
1339 bool do_rel_wr = ((req->cmd_flags & REQ_FUA) ||
1340 (req->cmd_flags & REQ_META)) &&
1341 (rq_data_dir(req) == WRITE) &&
d0c97cfb 1342 (md->flags & MMC_BLK_REL_WR);
f4c5522b 1343
54d49d77
PF		 1344 memset(brq, 0, sizeof(struct mmc_blk_request));
1345 brq->mrq.cmd = &brq->cmd;
1346 brq->mrq.data = &brq->data;
1da177e4 1347
54d49d77
PF		 1348 brq->cmd.arg = blk_rq_pos(req);
1349 if (!mmc_card_blockaddr(card))
1350 brq->cmd.arg <<= 9;
1351 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1352 brq->data.blksz = 512;
1353 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1354 brq->stop.arg = 0;
54d49d77 1355 brq->data.blocks = blk_rq_sectors(req);
6a79e391 1356
54d49d77
PF		 1357 /*
1358 * The block layer doesn't support all sector count
1359 * restrictions, so we need to be prepared for too big
1360 * requests.
1361 */
1362 if (brq->data.blocks > card->host->max_blk_count)
1363 brq->data.blocks = card->host->max_blk_count;
1da177e4 1364
2bf22b39
PW		 1365 if (brq->data.blocks > 1) {
1366 /*
1367 * After a read error, we redo the request one sector
1368 * at a time in order to accurately determine which
1369 * sectors can be read successfully.
1370 */
1371 if (disable_multi)
1372 brq->data.blocks = 1;
1373
1374 /* Some controllers can't do multiblock reads due to hw bugs */
1375 if (card->host->caps2 & MMC_CAP2_NO_MULTI_READ &&
1376 rq_data_dir(req) == READ)
1377 brq->data.blocks = 1;
1378 }
d0c97cfb 1379
54d49d77
PF		 1380 if (brq->data.blocks > 1 || do_rel_wr) {
1381 /* SPI multiblock writes terminate using a special
1382 * token, not a STOP_TRANSMISSION request.
d0c97cfb 1383 */
54d49d77
PF		 1384 if (!mmc_host_is_spi(card->host) ||
1385 rq_data_dir(req) == READ)
1386 brq->mrq.stop = &brq->stop;
1387 readcmd = MMC_READ_MULTIPLE_BLOCK;
1388 writecmd = MMC_WRITE_MULTIPLE_BLOCK;
1389 } else {
1390 brq->mrq.stop = NULL;
1391 readcmd = MMC_READ_SINGLE_BLOCK;
1392 writecmd = MMC_WRITE_BLOCK;
1393 }
1394 if (rq_data_dir(req) == READ) {
1395 brq->cmd.opcode = readcmd;
1396 brq->data.flags |= MMC_DATA_READ;
bcc3e172
UH		 1397 if (brq->mrq.stop)
1398 brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 |
1399 MMC_CMD_AC;
54d49d77
PF		 1400 } else {
1401 brq->cmd.opcode = writecmd;
1402 brq->data.flags |= MMC_DATA_WRITE;
bcc3e172
UH		 1403 if (brq->mrq.stop)
1404 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B |
1405 MMC_CMD_AC;
54d49d77 1406 }
d0c97cfb 1407
54d49d77
PF		 1408 if (do_rel_wr)
1409 mmc_apply_rel_rw(brq, card, req);
f4c5522b 1410
4265900e
SD		 1411 /*
1412 * Data tag is used only during writing meta data to speed
1413 * up write and any subsequent read of this meta data
1414 */
1415 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1416 (req->cmd_flags & REQ_META) &&
1417 (rq_data_dir(req) == WRITE) &&
1418 ((brq->data.blocks * brq->data.blksz) >=
1419 card->ext_csd.data_tag_unit_size);
1420
54d49d77
PF		 1421 /*
1422 * Pre-defined multi-block transfers are preferable to
1423 * open ended-ones (and necessary for reliable writes).
1424 * However, it is not sufficient to just send CMD23,
1425 * and avoid the final CMD12, as on an error condition
1426 * CMD12 (stop) needs to be sent anyway. This, coupled
1427 * with Auto-CMD23 enhancements provided by some
1428 * hosts, means that the complexity of dealing
1429 * with this is best left to the host. If CMD23 is
1430 * supported by card and host, we'll fill sbc in and let
1431 * the host deal with handling it correctly. This means
1432 * that for hosts that don't expose MMC_CAP_CMD23, no
1433 * change of behavior will be observed.
1434 *
1435 * N.B: Some MMC cards experience perf degradation.
1436 * We'll avoid using CMD23-bounded multiblock writes for
1437 * these, while retaining features like reliable writes.
1438 */
4265900e
SD		 1439 if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) &&
1440 (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) ||
1441 do_data_tag)) {
54d49d77
PF		 1442 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1443 brq->sbc.arg = brq->data.blocks |
4265900e
SD		 1444 (do_rel_wr ? (1 << 31) : 0) |
1445 (do_data_tag ? (1 << 29) : 0);
54d49d77
PF		 1446 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1447 brq->mrq.sbc = &brq->sbc;
1448 }
98ccf149 1449
54d49d77
PF		 1450 mmc_set_data_timeout(&brq->data, card);
1451
1452 brq->data.sg = mqrq->sg;
1453 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1454
1455 /*
1456 * Adjust the sg list so it is the same size as the
1457 * request.
1458 */
1459 if (brq->data.blocks != blk_rq_sectors(req)) {
1460 int i, data_size = brq->data.blocks << 9;
1461 struct scatterlist *sg;
1462
1463 for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) {
1464 data_size -= sg->length;
1465 if (data_size <= 0) {
1466 sg->length += data_size;
1467 i++;
1468 break;
6a79e391 1469 }
6a79e391 1470 }
54d49d77
PF		 1471 brq->data.sg_len = i;
1472 }
1473
ee8a43a5
PF		 1474 mqrq->mmc_active.mrq = &brq->mrq;
1475 mqrq->mmc_active.err_check = mmc_blk_err_check;
1476
54d49d77
PF		 1477 mmc_queue_bounce_pre(mqrq);
1478}
6a79e391 1479
ce39f9d1
SJ		 1480static inline u8 mmc_calc_packed_hdr_segs(struct request_queue *q,
1481 struct mmc_card *card)
1482{
1483 unsigned int hdr_sz = mmc_large_sector(card) ? 4096 : 512;
1484 unsigned int max_seg_sz = queue_max_segment_size(q);
1485 unsigned int len, nr_segs = 0;
1486
1487 do {
1488 len = min(hdr_sz, max_seg_sz);
1489 hdr_sz -= len;
1490 nr_segs++;
1491 } while (hdr_sz);
1492
1493 return nr_segs;
1494}
1495
1496static u8 mmc_blk_prep_packed_list(struct mmc_queue *mq, struct request *req)
1497{
1498 struct request_queue *q = mq->queue;
1499 struct mmc_card *card = mq->card;
1500 struct request *cur = req, *next = NULL;
1501 struct mmc_blk_data *md = mq->data;
1502 struct mmc_queue_req *mqrq = mq->mqrq_cur;
1503 bool en_rel_wr = card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN;
1504 unsigned int req_sectors = 0, phys_segments = 0;
1505 unsigned int max_blk_count, max_phys_segs;
1506 bool put_back = true;
1507 u8 max_packed_rw = 0;
1508 u8 reqs = 0;
1509
1510 if (!(md->flags & MMC_BLK_PACKED_CMD))
1511 goto no_packed;
1512
1513 if ((rq_data_dir(cur) == WRITE) &&
1514 mmc_host_packed_wr(card->host))
1515 max_packed_rw = card->ext_csd.max_packed_writes;
1516
1517 if (max_packed_rw == 0)
1518 goto no_packed;
1519
1520 if (mmc_req_rel_wr(cur) &&
1521 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1522 goto no_packed;
1523
1524 if (mmc_large_sector(card) &&
1525 !IS_ALIGNED(blk_rq_sectors(cur), 8))
1526 goto no_packed;
1527
1528 mmc_blk_clear_packed(mqrq);
1529
1530 max_blk_count = min(card->host->max_blk_count,
1531 card->host->max_req_size >> 9);
1532 if (unlikely(max_blk_count > 0xffff))
1533 max_blk_count = 0xffff;
1534
1535 max_phys_segs = queue_max_segments(q);
1536 req_sectors += blk_rq_sectors(cur);
1537 phys_segments += cur->nr_phys_segments;
1538
1539 if (rq_data_dir(cur) == WRITE) {
1540 req_sectors += mmc_large_sector(card) ? 8 : 1;
1541 phys_segments += mmc_calc_packed_hdr_segs(q, card);
1542 }
1543
1544 do {
1545 if (reqs >= max_packed_rw - 1) {
1546 put_back = false;
1547 break;
1548 }
1549
1550 spin_lock_irq(q->queue_lock);
1551 next = blk_fetch_request(q);
1552 spin_unlock_irq(q->queue_lock);
1553 if (!next) {
1554 put_back = false;
1555 break;
1556 }
1557
1558 if (mmc_large_sector(card) &&
1559 !IS_ALIGNED(blk_rq_sectors(next), 8))
1560 break;
1561
1562 if (next->cmd_flags & REQ_DISCARD ||
1563 next->cmd_flags & REQ_FLUSH)
1564 break;
1565
1566 if (rq_data_dir(cur) != rq_data_dir(next))
1567 break;
1568
1569 if (mmc_req_rel_wr(next) &&
1570 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1571 break;
1572
1573 req_sectors += blk_rq_sectors(next);
1574 if (req_sectors > max_blk_count)
1575 break;
1576
1577 phys_segments += next->nr_phys_segments;
1578 if (phys_segments > max_phys_segs)
1579 break;
1580
1581 list_add_tail(&next->queuelist, &mqrq->packed->list);
1582 cur = next;
1583 reqs++;
1584 } while (1);
1585
1586 if (put_back) {
1587 spin_lock_irq(q->queue_lock);
1588 blk_requeue_request(q, next);
1589 spin_unlock_irq(q->queue_lock);
1590 }
1591
1592 if (reqs > 0) {
1593 list_add(&req->queuelist, &mqrq->packed->list);
1594 mqrq->packed->nr_entries = ++reqs;
1595 mqrq->packed->retries = reqs;
1596 return reqs;
1597 }
1598
1599no_packed:
1600 mqrq->cmd_type = MMC_PACKED_NONE;
1601 return 0;
1602}
1603
1604static void mmc_blk_packed_hdr_wrq_prep(struct mmc_queue_req *mqrq,
1605 struct mmc_card *card,
1606 struct mmc_queue *mq)
1607{
1608 struct mmc_blk_request *brq = &mqrq->brq;
1609 struct request *req = mqrq->req;
1610 struct request *prq;
1611 struct mmc_blk_data *md = mq->data;
1612 struct mmc_packed *packed = mqrq->packed;
1613 bool do_rel_wr, do_data_tag;
1614 u32 *packed_cmd_hdr;
1615 u8 hdr_blocks;
1616 u8 i = 1;
1617
1618 BUG_ON(!packed);
1619
1620 mqrq->cmd_type = MMC_PACKED_WRITE;
1621 packed->blocks = 0;
1622 packed->idx_failure = MMC_PACKED_NR_IDX;
1623
1624 packed_cmd_hdr = packed->cmd_hdr;
1625 memset(packed_cmd_hdr, 0, sizeof(packed->cmd_hdr));
1626 packed_cmd_hdr[0] = (packed->nr_entries << 16) |
1627 (PACKED_CMD_WR << 8) | PACKED_CMD_VER;
1628 hdr_blocks = mmc_large_sector(card) ? 8 : 1;
1629
1630 /*
1631 * Argument for each entry of packed group
1632 */
1633 list_for_each_entry(prq, &packed->list, queuelist) {
1634 do_rel_wr = mmc_req_rel_wr(prq) && (md->flags & MMC_BLK_REL_WR);
1635 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1636 (prq->cmd_flags & REQ_META) &&
1637 (rq_data_dir(prq) == WRITE) &&
1638 ((brq->data.blocks * brq->data.blksz) >=
1639 card->ext_csd.data_tag_unit_size);
1640 /* Argument of CMD23 */
1641 packed_cmd_hdr[(i * 2)] =
1642 (do_rel_wr ? MMC_CMD23_ARG_REL_WR : 0) |
1643 (do_data_tag ? MMC_CMD23_ARG_TAG_REQ : 0) |
1644 blk_rq_sectors(prq);
1645 /* Argument of CMD18 or CMD25 */
1646 packed_cmd_hdr[((i * 2)) + 1] =
1647 mmc_card_blockaddr(card) ?
1648 blk_rq_pos(prq) : blk_rq_pos(prq) << 9;
1649 packed->blocks += blk_rq_sectors(prq);
1650 i++;
1651 }
1652
1653 memset(brq, 0, sizeof(struct mmc_blk_request));
1654 brq->mrq.cmd = &brq->cmd;
1655 brq->mrq.data = &brq->data;
1656 brq->mrq.sbc = &brq->sbc;
1657 brq->mrq.stop = &brq->stop;
1658
1659 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1660 brq->sbc.arg = MMC_CMD23_ARG_PACKED | (packed->blocks + hdr_blocks);
1661 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1662
1663 brq->cmd.opcode = MMC_WRITE_MULTIPLE_BLOCK;
1664 brq->cmd.arg = blk_rq_pos(req);
1665 if (!mmc_card_blockaddr(card))
1666 brq->cmd.arg <<= 9;
1667 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1668
1669 brq->data.blksz = 512;
1670 brq->data.blocks = packed->blocks + hdr_blocks;
1671 brq->data.flags |= MMC_DATA_WRITE;
1672
1673 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1674 brq->stop.arg = 0;
1675 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
1676
1677 mmc_set_data_timeout(&brq->data, card);
1678
1679 brq->data.sg = mqrq->sg;
1680 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1681
1682 mqrq->mmc_active.mrq = &brq->mrq;
1683 mqrq->mmc_active.err_check = mmc_blk_packed_err_check;
1684
1685 mmc_queue_bounce_pre(mqrq);
1686}
1687
67716327
AH		 1688static int mmc_blk_cmd_err(struct mmc_blk_data *md, struct mmc_card *card,
1689 struct mmc_blk_request *brq, struct request *req,
1690 int ret)
1691{
ce39f9d1
SJ		 1692 struct mmc_queue_req *mq_rq;
1693 mq_rq = container_of(brq, struct mmc_queue_req, brq);
1694
67716327
AH		 1695 /*
1696 * If this is an SD card and we're writing, we can first
1697 * mark the known good sectors as ok.
1698 *
1699 * If the card is not SD, we can still ok written sectors
1700 * as reported by the controller (which might be less than
1701 * the real number of written sectors, but never more).
1702 */
1703 if (mmc_card_sd(card)) {
1704 u32 blocks;
1705
1706 blocks = mmc_sd_num_wr_blocks(card);
1707 if (blocks != (u32)-1) {
ecf8b5d0 1708 ret = blk_end_request(req, 0, blocks << 9);
67716327
AH		 1709 }
1710 } else {
ce39f9d1
SJ		 1711 if (!mmc_packed_cmd(mq_rq->cmd_type))
1712 ret = blk_end_request(req, 0, brq->data.bytes_xfered);
67716327
AH		 1713 }
1714 return ret;
1715}
1716
ce39f9d1
SJ		 1717static int mmc_blk_end_packed_req(struct mmc_queue_req *mq_rq)
1718{
1719 struct request *prq;
1720 struct mmc_packed *packed = mq_rq->packed;
1721 int idx = packed->idx_failure, i = 0;
1722 int ret = 0;
1723
1724 BUG_ON(!packed);
1725
1726 while (!list_empty(&packed->list)) {
1727 prq = list_entry_rq(packed->list.next);
1728 if (idx == i) {
1729 /* retry from error index */
1730 packed->nr_entries -= idx;
1731 mq_rq->req = prq;
1732 ret = 1;
1733
1734 if (packed->nr_entries == MMC_PACKED_NR_SINGLE) {
1735 list_del_init(&prq->queuelist);
1736 mmc_blk_clear_packed(mq_rq);
1737 }
1738 return ret;
1739 }
1740 list_del_init(&prq->queuelist);
1741 blk_end_request(prq, 0, blk_rq_bytes(prq));
1742 i++;
1743 }
1744
1745 mmc_blk_clear_packed(mq_rq);
1746 return ret;
1747}
1748
1749static void mmc_blk_abort_packed_req(struct mmc_queue_req *mq_rq)
1750{
1751 struct request *prq;
1752 struct mmc_packed *packed = mq_rq->packed;
1753
1754 BUG_ON(!packed);
1755
1756 while (!list_empty(&packed->list)) {
1757 prq = list_entry_rq(packed->list.next);
1758 list_del_init(&prq->queuelist);
1759 blk_end_request(prq, -EIO, blk_rq_bytes(prq));
1760 }
1761
1762 mmc_blk_clear_packed(mq_rq);
1763}
1764
1765static void mmc_blk_revert_packed_req(struct mmc_queue *mq,
1766 struct mmc_queue_req *mq_rq)
1767{
1768 struct request *prq;
1769 struct request_queue *q = mq->queue;
1770 struct mmc_packed *packed = mq_rq->packed;
1771
1772 BUG_ON(!packed);
1773
1774 while (!list_empty(&packed->list)) {
1775 prq = list_entry_rq(packed->list.prev);
1776 if (prq->queuelist.prev != &packed->list) {
1777 list_del_init(&prq->queuelist);
1778 spin_lock_irq(q->queue_lock);
1779 blk_requeue_request(mq->queue, prq);
1780 spin_unlock_irq(q->queue_lock);
1781 } else {
1782 list_del_init(&prq->queuelist);
1783 }
1784 }
1785
1786 mmc_blk_clear_packed(mq_rq);
1787}
1788
ee8a43a5 1789static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc)
54d49d77
PF		 1790{
1791 struct mmc_blk_data *md = mq->data;
1792 struct mmc_card *card = md->queue.card;
1793 struct mmc_blk_request *brq = &mq->mqrq_cur->brq;
67716327 1794 int ret = 1, disable_multi = 0, retry = 0, type;
d78d4a8a 1795 enum mmc_blk_status status;
ee8a43a5 1796 struct mmc_queue_req *mq_rq;
a5075eb9 1797 struct request *req = rqc;
ee8a43a5 1798 struct mmc_async_req *areq;
ce39f9d1
SJ		 1799 const u8 packed_nr = 2;
1800 u8 reqs = 0;
1da177e4 1801
ee8a43a5
PF		 1802 if (!rqc && !mq->mqrq_prev->req)
1803 return 0;
98ccf149 1804
ce39f9d1
SJ		 1805 if (rqc)
1806 reqs = mmc_blk_prep_packed_list(mq, rqc);
1807
ee8a43a5
PF		 1808 do {
1809 if (rqc) {
a5075eb9
SD		 1810 /*
1811 * When 4KB native sector is enabled, only 8 blocks
1812 * multiple read or write is allowed
1813 */
1814 if ((brq->data.blocks & 0x07) &&
1815 (card->ext_csd.data_sector_size == 4096)) {
1816 pr_err("%s: Transfer size is not 4KB sector size aligned\n",
1817 req->rq_disk->disk_name);
ce39f9d1 1818 mq_rq = mq->mqrq_cur;
a5075eb9
SD		 1819 goto cmd_abort;
1820 }
ce39f9d1
SJ		 1821
1822 if (reqs >= packed_nr)
1823 mmc_blk_packed_hdr_wrq_prep(mq->mqrq_cur,
1824 card, mq);
1825 else
1826 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
ee8a43a5
PF		 1827 areq = &mq->mqrq_cur->mmc_active;
1828 } else
1829 areq = NULL;
1830 areq = mmc_start_req(card->host, areq, (int *) &status);
2220eedf
KD		 1831 if (!areq) {
1832 if (status == MMC_BLK_NEW_REQUEST)
1833 mq->flags |= MMC_QUEUE_NEW_REQUEST;
ee8a43a5 1834 return 0;
2220eedf 1835 }
ee8a43a5
PF		 1836
1837 mq_rq = container_of(areq, struct mmc_queue_req, mmc_active);
1838 brq = &mq_rq->brq;
1839 req = mq_rq->req;
67716327 1840 type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
ee8a43a5 1841 mmc_queue_bounce_post(mq_rq);
98ccf149 1842
d78d4a8a
PF		 1843 switch (status) {
1844 case MMC_BLK_SUCCESS:
1845 case MMC_BLK_PARTIAL:
1846 /*
1847 * A block was successfully transferred.
1848 */
67716327 1849 mmc_blk_reset_success(md, type);
ce39f9d1
SJ		 1850
1851 if (mmc_packed_cmd(mq_rq->cmd_type)) {
1852 ret = mmc_blk_end_packed_req(mq_rq);
1853 break;
1854 } else {
1855 ret = blk_end_request(req, 0,
d78d4a8a 1856 brq->data.bytes_xfered);
ce39f9d1
SJ		 1857 }
1858
67716327
AH		 1859 /*
1860 * If the blk_end_request function returns non-zero even
1861 * though all data has been transferred and no errors
1862 * were returned by the host controller, it's a bug.
1863 */
ee8a43a5 1864 if (status == MMC_BLK_SUCCESS && ret) {
a3c76eb9 1865 pr_err("%s BUG rq_tot %d d_xfer %d\n",
ee8a43a5
PF		 1866 __func__, blk_rq_bytes(req),
1867 brq->data.bytes_xfered);
1868 rqc = NULL;
1869 goto cmd_abort;
1870 }
d78d4a8a
PF		 1871 break;
1872 case MMC_BLK_CMD_ERR:
67716327
AH		 1873 ret = mmc_blk_cmd_err(md, card, brq, req, ret);
1874 if (!mmc_blk_reset(md, card->host, type))
1875 break;
1876 goto cmd_abort;
d78d4a8a
PF		 1877 case MMC_BLK_RETRY:
1878 if (retry++ < 5)
a01f3ccf 1879 break;
67716327 1880 /* Fall through */
d78d4a8a 1881 case MMC_BLK_ABORT:
67716327
AH		 1882 if (!mmc_blk_reset(md, card->host, type))
1883 break;
4c2b8f26 1884 goto cmd_abort;
67716327
AH		 1885 case MMC_BLK_DATA_ERR: {
1886 int err;
1887
1888 err = mmc_blk_reset(md, card->host, type);
1889 if (!err)
1890 break;
ce39f9d1
SJ		 1891 if (err == -ENODEV ||
1892 mmc_packed_cmd(mq_rq->cmd_type))
67716327
AH		 1893 goto cmd_abort;
1894 /* Fall through */
1895 }
1896 case MMC_BLK_ECC_ERR:
1897 if (brq->data.blocks > 1) {
1898 /* Redo read one sector at a time */
1899 pr_warning("%s: retrying using single block read\n",
1900 req->rq_disk->disk_name);
1901 disable_multi = 1;
1902 break;
1903 }
d78d4a8a
PF		 1904 /*
1905 * After an error, we redo I/O one sector at a
1906 * time, so we only reach here after trying to
1907 * read a single sector.
1908 */
ecf8b5d0 1909 ret = blk_end_request(req, -EIO,
d78d4a8a 1910 brq->data.blksz);
ee8a43a5
PF		 1911 if (!ret)
1912 goto start_new_req;
d78d4a8a 1913 break;
a8ad82cc
SRT		 1914 case MMC_BLK_NOMEDIUM:
1915 goto cmd_abort;
2220eedf
KD		 1916 default:
1917 pr_err("%s: Unhandled return value (%d)",
1918 req->rq_disk->disk_name, status);
1919 goto cmd_abort;
4c2b8f26
RKAL		 1920 }
1921
ee8a43a5 1922 if (ret) {
ce39f9d1
SJ		 1923 if (mmc_packed_cmd(mq_rq->cmd_type)) {
1924 if (!mq_rq->packed->retries)
1925 goto cmd_abort;
1926 mmc_blk_packed_hdr_wrq_prep(mq_rq, card, mq);
1927 mmc_start_req(card->host,
1928 &mq_rq->mmc_active, NULL);
1929 } else {
1930
1931 /*
1932 * In case of a incomplete request
1933 * prepare it again and resend.
1934 */
1935 mmc_blk_rw_rq_prep(mq_rq, card,
1936 disable_multi, mq);
1937 mmc_start_req(card->host,
1938 &mq_rq->mmc_active, NULL);
1939 }
ee8a43a5 1940 }
1da177e4
LT		 1941 } while (ret);
1942
1da177e4
LT		 1943 return 1;
1944
a01f3ccf 1945 cmd_abort:
ce39f9d1
SJ		 1946 if (mmc_packed_cmd(mq_rq->cmd_type)) {
1947 mmc_blk_abort_packed_req(mq_rq);
1948 } else {
1949 if (mmc_card_removed(card))
1950 req->cmd_flags |= REQ_QUIET;
1951 while (ret)
1952 ret = blk_end_request(req, -EIO,
1953 blk_rq_cur_bytes(req));
1954 }
1da177e4 1955
ee8a43a5
PF		 1956 start_new_req:
1957 if (rqc) {
7a81902f
SJ		 1958 if (mmc_card_removed(card)) {
1959 rqc->cmd_flags |= REQ_QUIET;
1960 blk_end_request_all(rqc, -EIO);
1961 } else {
ce39f9d1
SJ		 1962 /*
1963 * If current request is packed, it needs to put back.
1964 */
1965 if (mmc_packed_cmd(mq->mqrq_cur->cmd_type))
1966 mmc_blk_revert_packed_req(mq, mq->mqrq_cur);
1967
7a81902f
SJ		 1968 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
1969 mmc_start_req(card->host,
1970 &mq->mqrq_cur->mmc_active, NULL);
1971 }
ee8a43a5
PF		 1972 }
1973
1da177e4
LT		 1974 return 0;
1975}
1976
bd788c96
AH		 1977static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
1978{
1a258db6
AW		 1979 int ret;
1980 struct mmc_blk_data *md = mq->data;
1981 struct mmc_card *card = md->queue.card;
2220eedf
KD		 1982 struct mmc_host *host = card->host;
1983 unsigned long flags;
f662ae48 1984 unsigned int cmd_flags = req ? req->cmd_flags : 0;
1a258db6 1985
ee8a43a5
PF		 1986 if (req && !mq->mqrq_prev->req)
1987 /* claim host only for the first request */
e94cfef6 1988 mmc_get_card(card);
ee8a43a5 1989
371a689f
AW		 1990 ret = mmc_blk_part_switch(card, md);
1991 if (ret) {
0d7d85ca 1992 if (req) {
ecf8b5d0 1993 blk_end_request_all(req, -EIO);
0d7d85ca 1994 }
371a689f
AW		 1995 ret = 0;
1996 goto out;
1997 }
1a258db6 1998
2220eedf 1999 mq->flags &= ~MMC_QUEUE_NEW_REQUEST;
f662ae48 2000 if (cmd_flags & REQ_DISCARD) {
ee8a43a5
PF		 2001 /* complete ongoing async transfer before issuing discard */
2002 if (card->host->areq)
2003 mmc_blk_issue_rw_rq(mq, NULL);
3550ccdb
IC		 2004 if (req->cmd_flags & REQ_SECURE &&
2005 !(card->quirks & MMC_QUIRK_SEC_ERASE_TRIM_BROKEN))
1a258db6 2006 ret = mmc_blk_issue_secdiscard_rq(mq, req);
49804548 2007 else
1a258db6 2008 ret = mmc_blk_issue_discard_rq(mq, req);
f662ae48 2009 } else if (cmd_flags & REQ_FLUSH) {
393f9a08
JC		 2010 /* complete ongoing async transfer before issuing flush */
2011 if (card->host->areq)
2012 mmc_blk_issue_rw_rq(mq, NULL);
1a258db6 2013 ret = mmc_blk_issue_flush(mq, req);
49804548 2014 } else {
2220eedf
KD		 2015 if (!req && host->areq) {
2016 spin_lock_irqsave(&host->context_info.lock, flags);
2017 host->context_info.is_waiting_last_req = true;
2018 spin_unlock_irqrestore(&host->context_info.lock, flags);
2019 }
1a258db6 2020 ret = mmc_blk_issue_rw_rq(mq, req);
49804548 2021 }
1a258db6 2022
371a689f 2023out:
ef3a69c7 2024 if ((!req && !(mq->flags & MMC_QUEUE_NEW_REQUEST)) ||
f662ae48 2025 (cmd_flags & MMC_REQ_SPECIAL_MASK))
ef3a69c7
SJ		 2026 /*
2027 * Release host when there are no more requests
2028 * and after special request(discard, flush) is done.
2029 * In case sepecial request, there is no reentry to
2030 * the 'mmc_blk_issue_rq' with 'mqrq_prev->req'.
2031 */
e94cfef6 2032 mmc_put_card(card);
1a258db6 2033 return ret;
bd788c96 2034}
1da177e4 2035
a6f6c96b
RK		 2036static inline int mmc_blk_readonly(struct mmc_card *card)
2037{
2038 return mmc_card_readonly(card) ||
2039 !(card->csd.cmdclass & CCC_BLOCK_WRITE);
2040}
2041
371a689f
AW		 2042static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
2043 struct device *parent,
2044 sector_t size,
2045 bool default_ro,
add710ea
JR		 2046 const char *subname,
2047 int area_type)
1da177e4
LT		 2048{
2049 struct mmc_blk_data *md;
2050 int devidx, ret;
2051
5e71b7a6
OJ		 2052 devidx = find_first_zero_bit(dev_use, max_devices);
2053 if (devidx >= max_devices)
1da177e4
LT		 2054 return ERR_PTR(-ENOSPC);
2055 __set_bit(devidx, dev_use);
2056
dd00cc48 2057 md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL);
a6f6c96b
RK		 2058 if (!md) {
2059 ret = -ENOMEM;
2060 goto out;
2061 }
1da177e4 2062
f06c9153
AW		 2063 /*
2064 * !subname implies we are creating main mmc_blk_data that will be
2065 * associated with mmc_card with mmc_set_drvdata. Due to device
2066 * partitions, devidx will not coincide with a per-physical card
2067 * index anymore so we keep track of a name index.
2068 */
2069 if (!subname) {
2070 md->name_idx = find_first_zero_bit(name_use, max_devices);
2071 __set_bit(md->name_idx, name_use);
add710ea 2072 } else
f06c9153
AW		 2073 md->name_idx = ((struct mmc_blk_data *)
2074 dev_to_disk(parent)->private_data)->name_idx;
2075
add710ea
JR		 2076 md->area_type = area_type;
2077
a6f6c96b
RK		 2078 /*
2079 * Set the read-only status based on the supported commands
2080 * and the write protect switch.
2081 */
2082 md->read_only = mmc_blk_readonly(card);
1da177e4 2083
5e71b7a6 2084 md->disk = alloc_disk(perdev_minors);
a6f6c96b
RK		 2085 if (md->disk == NULL) {
2086 ret = -ENOMEM;
2087 goto err_kfree;
2088 }
1da177e4 2089
a6f6c96b 2090 spin_lock_init(&md->lock);
371a689f 2091 INIT_LIST_HEAD(&md->part);
a6f6c96b 2092 md->usage = 1;
1da177e4 2093
d09408ad 2094 ret = mmc_init_queue(&md->queue, card, &md->lock, subname);
a6f6c96b
RK		 2095 if (ret)
2096 goto err_putdisk;
1da177e4 2097
a6f6c96b
RK		 2098 md->queue.issue_fn = mmc_blk_issue_rq;
2099 md->queue.data = md;
d2b18394 2100
fe6b4c88 2101 md->disk->major = MMC_BLOCK_MAJOR;
5e71b7a6 2102 md->disk->first_minor = devidx * perdev_minors;
a6f6c96b
RK		 2103 md->disk->fops = &mmc_bdops;
2104 md->disk->private_data = md;
2105 md->disk->queue = md->queue.queue;
371a689f
AW		 2106 md->disk->driverfs_dev = parent;
2107 set_disk_ro(md->disk, md->read_only || default_ro);
53d8f974
LP		 2108 if (area_type & MMC_BLK_DATA_AREA_RPMB)
2109 md->disk->flags |= GENHD_FL_NO_PART_SCAN;
a6f6c96b
RK		 2110
2111 /*
2112 * As discussed on lkml, GENHD_FL_REMOVABLE should:
2113 *
2114 * - be set for removable media with permanent block devices
2115 * - be unset for removable block devices with permanent media
2116 *
2117 * Since MMC block devices clearly fall under the second
2118 * case, we do not set GENHD_FL_REMOVABLE. Userspace
2119 * should use the block device creation/destruction hotplug
2120 * messages to tell when the card is present.
2121 */
2122
f06c9153
AW		 2123 snprintf(md->disk->disk_name, sizeof(md->disk->disk_name),
2124 "mmcblk%d%s", md->name_idx, subname ? subname : "");
a6f6c96b 2125
a5075eb9
SD		 2126 if (mmc_card_mmc(card))
2127 blk_queue_logical_block_size(md->queue.queue,
2128 card->ext_csd.data_sector_size);
2129 else
2130 blk_queue_logical_block_size(md->queue.queue, 512);
2131
371a689f 2132 set_capacity(md->disk, size);
d0c97cfb 2133
f0d89972
AW		 2134 if (mmc_host_cmd23(card->host)) {
2135 if (mmc_card_mmc(card) ||
2136 (mmc_card_sd(card) &&
2137 card->scr.cmds & SD_SCR_CMD23_SUPPORT))
2138 md->flags |= MMC_BLK_CMD23;
2139 }
d0c97cfb
AW		 2140
2141 if (mmc_card_mmc(card) &&
2142 md->flags & MMC_BLK_CMD23 &&
2143 ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) ||
2144 card->ext_csd.rel_sectors)) {
2145 md->flags |= MMC_BLK_REL_WR;
2146 blk_queue_flush(md->queue.queue, REQ_FLUSH | REQ_FUA);
2147 }
2148
ce39f9d1
SJ		 2149 if (mmc_card_mmc(card) &&
2150 (area_type == MMC_BLK_DATA_AREA_MAIN) &&
2151 (md->flags & MMC_BLK_CMD23) &&
2152 card->ext_csd.packed_event_en) {
2153 if (!mmc_packed_init(&md->queue, card))
2154 md->flags |= MMC_BLK_PACKED_CMD;
2155 }
2156
371a689f
AW		 2157 return md;
2158
2159 err_putdisk:
2160 put_disk(md->disk);
2161 err_kfree:
2162 kfree(md);
2163 out:
2164 return ERR_PTR(ret);
2165}
2166
2167static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
2168{
2169 sector_t size;
2170 struct mmc_blk_data *md;
a6f6c96b 2171
85a18ad9
PO		 2172 if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) {
2173 /*
2174 * The EXT_CSD sector count is in number or 512 byte
2175 * sectors.
2176 */
371a689f 2177 size = card->ext_csd.sectors;
85a18ad9
PO		 2178 } else {
2179 /*
2180 * The CSD capacity field is in units of read_blkbits.
2181 * set_capacity takes units of 512 bytes.
2182 */
371a689f 2183 size = card->csd.capacity << (card->csd.read_blkbits - 9);
85a18ad9 2184 }
371a689f 2185
add710ea
JR		 2186 md = mmc_blk_alloc_req(card, &card->dev, size, false, NULL,
2187 MMC_BLK_DATA_AREA_MAIN);
1da177e4 2188 return md;
371a689f 2189}
a6f6c96b 2190
371a689f
AW		 2191static int mmc_blk_alloc_part(struct mmc_card *card,
2192 struct mmc_blk_data *md,
2193 unsigned int part_type,
2194 sector_t size,
2195 bool default_ro,
add710ea
JR		 2196 const char *subname,
2197 int area_type)
371a689f
AW		 2198{
2199 char cap_str[10];
2200 struct mmc_blk_data *part_md;
2201
2202 part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro,
add710ea 2203 subname, area_type);
371a689f
AW		 2204 if (IS_ERR(part_md))
2205 return PTR_ERR(part_md);
2206 part_md->part_type = part_type;
2207 list_add(&part_md->part, &md->part);
2208
2209 string_get_size((u64)get_capacity(part_md->disk) << 9, STRING_UNITS_2,
2210 cap_str, sizeof(cap_str));
a3c76eb9 2211 pr_info("%s: %s %s partition %u %s\n",
371a689f
AW		 2212 part_md->disk->disk_name, mmc_card_id(card),
2213 mmc_card_name(card), part_md->part_type, cap_str);
2214 return 0;
2215}
2216
e0c368d5
NJ		 2217/* MMC Physical partitions consist of two boot partitions and
2218 * up to four general purpose partitions.
2219 * For each partition enabled in EXT_CSD a block device will be allocatedi
2220 * to provide access to the partition.
2221 */
2222
371a689f
AW		 2223static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md)
2224{
e0c368d5 2225 int idx, ret = 0;
371a689f
AW		 2226
2227 if (!mmc_card_mmc(card))
2228 return 0;
2229
e0c368d5
NJ		 2230 for (idx = 0; idx < card->nr_parts; idx++) {
2231 if (card->part[idx].size) {
2232 ret = mmc_blk_alloc_part(card, md,
2233 card->part[idx].part_cfg,
2234 card->part[idx].size >> 9,
2235 card->part[idx].force_ro,
add710ea
JR		 2236 card->part[idx].name,
2237 card->part[idx].area_type);
e0c368d5
NJ		 2238 if (ret)
2239 return ret;
2240 }
371a689f
AW		 2241 }
2242
2243 return ret;
1da177e4
LT		 2244}
2245
371a689f
AW		 2246static void mmc_blk_remove_req(struct mmc_blk_data *md)
2247{
add710ea
JR		 2248 struct mmc_card *card;
2249
371a689f 2250 if (md) {
fdfa20c1
PT		 2251 /*
2252 * Flush remaining requests and free queues. It
2253 * is freeing the queue that stops new requests
2254 * from being accepted.
2255 */
8efb83a2 2256 card = md->queue.card;
fdfa20c1
PT		 2257 mmc_cleanup_queue(&md->queue);
2258 if (md->flags & MMC_BLK_PACKED_CMD)
2259 mmc_packed_clean(&md->queue);
371a689f
AW		 2260 if (md->disk->flags & GENHD_FL_UP) {
2261 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
add710ea
JR		 2262 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2263 card->ext_csd.boot_ro_lockable)
2264 device_remove_file(disk_to_dev(md->disk),
2265 &md->power_ro_lock);
371a689f 2266
371a689f
AW		 2267 del_gendisk(md->disk);
2268 }
371a689f
AW		 2269 mmc_blk_put(md);
2270 }
2271}
2272
2273static void mmc_blk_remove_parts(struct mmc_card *card,
2274 struct mmc_blk_data *md)
2275{
2276 struct list_head *pos, *q;
2277 struct mmc_blk_data *part_md;
2278
f06c9153 2279 __clear_bit(md->name_idx, name_use);
371a689f
AW		 2280 list_for_each_safe(pos, q, &md->part) {
2281 part_md = list_entry(pos, struct mmc_blk_data, part);
2282 list_del(pos);
2283 mmc_blk_remove_req(part_md);
2284 }
2285}
2286
2287static int mmc_add_disk(struct mmc_blk_data *md)
2288{
2289 int ret;
add710ea 2290 struct mmc_card *card = md->queue.card;
371a689f
AW		 2291
2292 add_disk(md->disk);
2293 md->force_ro.show = force_ro_show;
2294 md->force_ro.store = force_ro_store;
641c3187 2295 sysfs_attr_init(&md->force_ro.attr);
371a689f
AW		 2296 md->force_ro.attr.name = "force_ro";
2297 md->force_ro.attr.mode = S_IRUGO | S_IWUSR;
2298 ret = device_create_file(disk_to_dev(md->disk), &md->force_ro);
2299 if (ret)
add710ea
JR		 2300 goto force_ro_fail;
2301
2302 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2303 card->ext_csd.boot_ro_lockable) {
88187398 2304 umode_t mode;
add710ea
JR		 2305
2306 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS)
2307 mode = S_IRUGO;
2308 else
2309 mode = S_IRUGO | S_IWUSR;
2310
2311 md->power_ro_lock.show = power_ro_lock_show;
2312 md->power_ro_lock.store = power_ro_lock_store;
00d9ac08 2313 sysfs_attr_init(&md->power_ro_lock.attr);
add710ea
JR		 2314 md->power_ro_lock.attr.mode = mode;
2315 md->power_ro_lock.attr.name =
2316 "ro_lock_until_next_power_on";
2317 ret = device_create_file(disk_to_dev(md->disk),
2318 &md->power_ro_lock);
2319 if (ret)
2320 goto power_ro_lock_fail;
2321 }
2322 return ret;
2323
2324power_ro_lock_fail:
2325 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2326force_ro_fail:
2327 del_gendisk(md->disk);
371a689f
AW		 2328
2329 return ret;
2330}
2331
c59d4473
CB		 2332#define CID_MANFID_SANDISK 0x2
2333#define CID_MANFID_TOSHIBA 0x11
2334#define CID_MANFID_MICRON 0x13
3550ccdb 2335#define CID_MANFID_SAMSUNG 0x15
c59d4473 2336
6f60c222
AW		 2337static const struct mmc_fixup blk_fixups[] =
2338{
c59d4473
CB		 2339 MMC_FIXUP("SEM02G", CID_MANFID_SANDISK, 0x100, add_quirk,
2340 MMC_QUIRK_INAND_CMD38),
2341 MMC_FIXUP("SEM04G", CID_MANFID_SANDISK, 0x100, add_quirk,
2342 MMC_QUIRK_INAND_CMD38),
2343 MMC_FIXUP("SEM08G", CID_MANFID_SANDISK, 0x100, add_quirk,
2344 MMC_QUIRK_INAND_CMD38),
2345 MMC_FIXUP("SEM16G", CID_MANFID_SANDISK, 0x100, add_quirk,
2346 MMC_QUIRK_INAND_CMD38),
2347 MMC_FIXUP("SEM32G", CID_MANFID_SANDISK, 0x100, add_quirk,
2348 MMC_QUIRK_INAND_CMD38),
d0c97cfb
AW		 2349
2350 /*
2351 * Some MMC cards experience performance degradation with CMD23
2352 * instead of CMD12-bounded multiblock transfers. For now we'll
2353 * black list what's bad...
2354 * - Certain Toshiba cards.
2355 *
2356 * N.B. This doesn't affect SD cards.
2357 */
c59d4473 2358 MMC_FIXUP("MMC08G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
d0c97cfb 2359 MMC_QUIRK_BLK_NO_CMD23),
c59d4473 2360 MMC_FIXUP("MMC16G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
d0c97cfb 2361 MMC_QUIRK_BLK_NO_CMD23),
c59d4473 2362 MMC_FIXUP("MMC32G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
d0c97cfb 2363 MMC_QUIRK_BLK_NO_CMD23),
6de5fc9c
SNX		 2364
2365 /*
2366 * Some Micron MMC cards needs longer data read timeout than
2367 * indicated in CSD.
2368 */
c59d4473 2369 MMC_FIXUP(CID_NAME_ANY, CID_MANFID_MICRON, 0x200, add_quirk_mmc,
6de5fc9c
SNX		 2370 MMC_QUIRK_LONG_READ_TIME),
2371
3550ccdb
IC		 2372 /*
2373 * On these Samsung MoviNAND parts, performing secure erase or
2374 * secure trim can result in unrecoverable corruption due to a
2375 * firmware bug.
2376 */
2377 MMC_FIXUP("M8G2FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2378 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2379 MMC_FIXUP("MAG4FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2380 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2381 MMC_FIXUP("MBG8FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2382 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2383 MMC_FIXUP("MCGAFA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2384 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2385 MMC_FIXUP("VAL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2386 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2387 MMC_FIXUP("VYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2388 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2389 MMC_FIXUP("KYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2390 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2391 MMC_FIXUP("VZL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2392 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2393
6f60c222
AW		 2394 END_FIXUP
2395};
2396
1da177e4
LT		 2397static int mmc_blk_probe(struct mmc_card *card)
2398{
371a689f 2399 struct mmc_blk_data *md, *part_md;
a7bbb573
PO		 2400 char cap_str[10];
2401
912490db
PO		 2402 /*
2403 * Check that the card supports the command class(es) we need.
2404 */
2405 if (!(card->csd.cmdclass & CCC_BLOCK_READ))
1da177e4
LT		 2406 return -ENODEV;
2407
1da177e4
LT		 2408 md = mmc_blk_alloc(card);
2409 if (IS_ERR(md))
2410 return PTR_ERR(md);
2411
444122fd 2412 string_get_size((u64)get_capacity(md->disk) << 9, STRING_UNITS_2,
a7bbb573 2413 cap_str, sizeof(cap_str));
a3c76eb9 2414 pr_info("%s: %s %s %s %s\n",
1da177e4 2415 md->disk->disk_name, mmc_card_id(card), mmc_card_name(card),
a7bbb573 2416 cap_str, md->read_only ? "(ro)" : "");
1da177e4 2417
371a689f
AW		 2418 if (mmc_blk_alloc_parts(card, md))
2419 goto out;
2420
1da177e4 2421 mmc_set_drvdata(card, md);
6f60c222
AW		 2422 mmc_fixup_device(card, blk_fixups);
2423
371a689f
AW		 2424 if (mmc_add_disk(md))
2425 goto out;
2426
2427 list_for_each_entry(part_md, &md->part, part) {
2428 if (mmc_add_disk(part_md))
2429 goto out;
2430 }
e94cfef6
UH		 2431
2432 pm_runtime_set_autosuspend_delay(&card->dev, 3000);
2433 pm_runtime_use_autosuspend(&card->dev);
2434
2435 /*
2436 * Don't enable runtime PM for SD-combo cards here. Leave that
2437 * decision to be taken during the SDIO init sequence instead.
2438 */
2439 if (card->type != MMC_TYPE_SD_COMBO) {
2440 pm_runtime_set_active(&card->dev);
2441 pm_runtime_enable(&card->dev);
2442 }
2443
1da177e4
LT		 2444 return 0;
2445
2446 out:
371a689f
AW		 2447 mmc_blk_remove_parts(card, md);
2448 mmc_blk_remove_req(md);
5865f287 2449 return 0;
1da177e4
LT		 2450}
2451
2452static void mmc_blk_remove(struct mmc_card *card)
2453{
2454 struct mmc_blk_data *md = mmc_get_drvdata(card);
2455
371a689f 2456 mmc_blk_remove_parts(card, md);
e94cfef6 2457 pm_runtime_get_sync(&card->dev);
ddd6fa7e
AH		 2458 mmc_claim_host(card->host);
2459 mmc_blk_part_switch(card, md);
2460 mmc_release_host(card->host);
e94cfef6
UH		 2461 if (card->type != MMC_TYPE_SD_COMBO)
2462 pm_runtime_disable(&card->dev);
2463 pm_runtime_put_noidle(&card->dev);
371a689f 2464 mmc_blk_remove_req(md);
1da177e4
LT		 2465 mmc_set_drvdata(card, NULL);
2466}
2467
76287748 2468static int _mmc_blk_suspend(struct mmc_card *card)
1da177e4 2469{
371a689f 2470 struct mmc_blk_data *part_md;
1da177e4
LT		 2471 struct mmc_blk_data *md = mmc_get_drvdata(card);
2472
2473 if (md) {
2474 mmc_queue_suspend(&md->queue);
371a689f
AW		 2475 list_for_each_entry(part_md, &md->part, part) {
2476 mmc_queue_suspend(&part_md->queue);
2477 }
1da177e4
LT		 2478 }
2479 return 0;
2480}
2481
76287748
UH		 2482static void mmc_blk_shutdown(struct mmc_card *card)
2483{
2484 _mmc_blk_suspend(card);
2485}
2486
2487#ifdef CONFIG_PM
2488static int mmc_blk_suspend(struct mmc_card *card)
2489{
2490 return _mmc_blk_suspend(card);
2491}
2492
1da177e4
LT		 2493static int mmc_blk_resume(struct mmc_card *card)
2494{
371a689f 2495 struct mmc_blk_data *part_md;
1da177e4
LT		 2496 struct mmc_blk_data *md = mmc_get_drvdata(card);
2497
2498 if (md) {
371a689f
AW		 2499 /*
2500 * Resume involves the card going into idle state,
2501 * so current partition is always the main one.
2502 */
2503 md->part_curr = md->part_type;
1da177e4 2504 mmc_queue_resume(&md->queue);
371a689f
AW		 2505 list_for_each_entry(part_md, &md->part, part) {
2506 mmc_queue_resume(&part_md->queue);
2507 }
1da177e4
LT		 2508 }
2509 return 0;
2510}
2511#else
2512#define mmc_blk_suspend NULL
2513#define mmc_blk_resume NULL
2514#endif
2515
2516static struct mmc_driver mmc_driver = {
2517 .drv = {
2518 .name = "mmcblk",
2519 },
2520 .probe = mmc_blk_probe,
2521 .remove = mmc_blk_remove,
2522 .suspend = mmc_blk_suspend,
2523 .resume = mmc_blk_resume,
76287748 2524 .shutdown = mmc_blk_shutdown,
1da177e4
LT		 2525};
2526
2527static int __init mmc_blk_init(void)
2528{
9d4e98e9 2529 int res;
1da177e4 2530
5e71b7a6
OJ		 2531 if (perdev_minors != CONFIG_MMC_BLOCK_MINORS)
2532 pr_info("mmcblk: using %d minors per device\n", perdev_minors);
2533
2534 max_devices = 256 / perdev_minors;
2535
fe6b4c88
PO		 2536 res = register_blkdev(MMC_BLOCK_MAJOR, "mmc");
2537 if (res)
1da177e4 2538 goto out;
1da177e4 2539
9d4e98e9
AM		 2540 res = mmc_register_driver(&mmc_driver);
2541 if (res)
2542 goto out2;
1da177e4 2543
9d4e98e9
AM		 2544 return 0;
2545 out2:
2546 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
1da177e4
LT		 2547 out:
2548 return res;
2549}
2550
2551static void __exit mmc_blk_exit(void)
2552{
2553 mmc_unregister_driver(&mmc_driver);
fe6b4c88 2554 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
1da177e4
LT		 2555}
2556
2557module_init(mmc_blk_init);
2558module_exit(mmc_blk_exit);
2559
2560MODULE_LICENSE("GPL");
2561MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver");
2562
Linux 6.x block layer and io_uring tree(s)