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mmc: core: Flag re-tuning is needed on CRC errors
[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
a26eba61
BH		 81 * limited to (1 << 20) / number of minors per device. It is also
82 * currently limited by the size of the static bitmaps below.
5e71b7a6
OJ		 83 */
84static int max_devices;
85
a26eba61
BH		 86#define MAX_DEVICES 256
87
88/* TODO: Replace these with struct ida */
89static DECLARE_BITMAP(dev_use, MAX_DEVICES);
90static DECLARE_BITMAP(name_use, MAX_DEVICES);
1da177e4 91
1da177e4
LT		 92/*
93 * There is one mmc_blk_data per slot.
94 */
95struct mmc_blk_data {
96 spinlock_t lock;
97 struct gendisk *disk;
98 struct mmc_queue queue;
371a689f 99 struct list_head part;
1da177e4 100
d0c97cfb
AW		 101 unsigned int flags;
102#define MMC_BLK_CMD23 (1 << 0) /* Can do SET_BLOCK_COUNT for multiblock */
103#define MMC_BLK_REL_WR (1 << 1) /* MMC Reliable write support */
ce39f9d1 104#define MMC_BLK_PACKED_CMD (1 << 2) /* MMC packed command support */
d0c97cfb 105
1da177e4 106 unsigned int usage;
a6f6c96b 107 unsigned int read_only;
371a689f 108 unsigned int part_type;
f06c9153 109 unsigned int name_idx;
67716327
AH		 110 unsigned int reset_done;
111#define MMC_BLK_READ BIT(0)
112#define MMC_BLK_WRITE BIT(1)
113#define MMC_BLK_DISCARD BIT(2)
114#define MMC_BLK_SECDISCARD BIT(3)
371a689f
AW		 115
116 /*
117 * Only set in main mmc_blk_data associated
fc95e30b 118 * with mmc_card with dev_set_drvdata, and keeps
371a689f
AW		 119 * track of the current selected device partition.
120 */
121 unsigned int part_curr;
122 struct device_attribute force_ro;
add710ea
JR		 123 struct device_attribute power_ro_lock;
124 int area_type;
1da177e4
LT		 125};
126
a621aaed 127static DEFINE_MUTEX(open_lock);
1da177e4 128
ce39f9d1
SJ		 129enum {
130 MMC_PACKED_NR_IDX = -1,
131 MMC_PACKED_NR_ZERO,
132 MMC_PACKED_NR_SINGLE,
133};
134
5e71b7a6
OJ		 135module_param(perdev_minors, int, 0444);
136MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device");
137
8d1e977d
LP		 138static inline int mmc_blk_part_switch(struct mmc_card *card,
139 struct mmc_blk_data *md);
140static int get_card_status(struct mmc_card *card, u32 *status, int retries);
141
ce39f9d1
SJ		 142static inline void mmc_blk_clear_packed(struct mmc_queue_req *mqrq)
143{
144 struct mmc_packed *packed = mqrq->packed;
145
146 BUG_ON(!packed);
147
148 mqrq->cmd_type = MMC_PACKED_NONE;
149 packed->nr_entries = MMC_PACKED_NR_ZERO;
150 packed->idx_failure = MMC_PACKED_NR_IDX;
151 packed->retries = 0;
152 packed->blocks = 0;
153}
154
1da177e4
LT		 155static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk)
156{
157 struct mmc_blk_data *md;
158
a621aaed 159 mutex_lock(&open_lock);
1da177e4
LT		 160 md = disk->private_data;
161 if (md && md->usage == 0)
162 md = NULL;
163 if (md)
164 md->usage++;
a621aaed 165 mutex_unlock(&open_lock);
1da177e4
LT		 166
167 return md;
168}
169
371a689f
AW		 170static inline int mmc_get_devidx(struct gendisk *disk)
171{
172 int devmaj = MAJOR(disk_devt(disk));
173 int devidx = MINOR(disk_devt(disk)) / perdev_minors;
174
175 if (!devmaj)
176 devidx = disk->first_minor / perdev_minors;
177 return devidx;
178}
179
1da177e4
LT		 180static void mmc_blk_put(struct mmc_blk_data *md)
181{
a621aaed 182 mutex_lock(&open_lock);
1da177e4
LT		 183 md->usage--;
184 if (md->usage == 0) {
371a689f 185 int devidx = mmc_get_devidx(md->disk);
5fa83ce2
AH		 186 blk_cleanup_queue(md->queue.queue);
187
1dff3144
DW		 188 __clear_bit(devidx, dev_use);
189
1da177e4 190 put_disk(md->disk);
1da177e4
LT		 191 kfree(md);
192 }
a621aaed 193 mutex_unlock(&open_lock);
1da177e4
LT		 194}
195
add710ea
JR		 196static ssize_t power_ro_lock_show(struct device *dev,
197 struct device_attribute *attr, char *buf)
198{
199 int ret;
200 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
201 struct mmc_card *card = md->queue.card;
202 int locked = 0;
203
204 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PERM_WP_EN)
205 locked = 2;
206 else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN)
207 locked = 1;
208
209 ret = snprintf(buf, PAGE_SIZE, "%d\n", locked);
210
211 return ret;
212}
213
214static ssize_t power_ro_lock_store(struct device *dev,
215 struct device_attribute *attr, const char *buf, size_t count)
216{
217 int ret;
218 struct mmc_blk_data *md, *part_md;
219 struct mmc_card *card;
220 unsigned long set;
221
222 if (kstrtoul(buf, 0, &set))
223 return -EINVAL;
224
225 if (set != 1)
226 return count;
227
228 md = mmc_blk_get(dev_to_disk(dev));
229 card = md->queue.card;
230
e94cfef6 231 mmc_get_card(card);
add710ea
JR		 232
233 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP,
234 card->ext_csd.boot_ro_lock |
235 EXT_CSD_BOOT_WP_B_PWR_WP_EN,
236 card->ext_csd.part_time);
237 if (ret)
238 pr_err("%s: Locking boot partition ro until next power on failed: %d\n", md->disk->disk_name, ret);
239 else
240 card->ext_csd.boot_ro_lock |= EXT_CSD_BOOT_WP_B_PWR_WP_EN;
241
e94cfef6 242 mmc_put_card(card);
add710ea
JR		 243
244 if (!ret) {
245 pr_info("%s: Locking boot partition ro until next power on\n",
246 md->disk->disk_name);
247 set_disk_ro(md->disk, 1);
248
249 list_for_each_entry(part_md, &md->part, part)
250 if (part_md->area_type == MMC_BLK_DATA_AREA_BOOT) {
251 pr_info("%s: Locking boot partition ro until next power on\n", part_md->disk->disk_name);
252 set_disk_ro(part_md->disk, 1);
253 }
254 }
255
256 mmc_blk_put(md);
257 return count;
258}
259
371a689f
AW		 260static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr,
261 char *buf)
262{
263 int ret;
264 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
265
0031a98a 266 ret = snprintf(buf, PAGE_SIZE, "%d\n",
371a689f
AW		 267 get_disk_ro(dev_to_disk(dev)) ^
268 md->read_only);
269 mmc_blk_put(md);
270 return ret;
271}
272
273static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr,
274 const char *buf, size_t count)
275{
276 int ret;
277 char *end;
278 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
279 unsigned long set = simple_strtoul(buf, &end, 0);
280 if (end == buf) {
281 ret = -EINVAL;
282 goto out;
283 }
284
285 set_disk_ro(dev_to_disk(dev), set || md->read_only);
286 ret = count;
287out:
288 mmc_blk_put(md);
289 return ret;
290}
291
a5a1561f 292static int mmc_blk_open(struct block_device *bdev, fmode_t mode)
1da177e4 293{
a5a1561f 294 struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk);
1da177e4
LT		 295 int ret = -ENXIO;
296
2a48fc0a 297 mutex_lock(&block_mutex);
1da177e4
LT		 298 if (md) {
299 if (md->usage == 2)
a5a1561f 300 check_disk_change(bdev);
1da177e4 301 ret = 0;
a00fc090 302
a5a1561f 303 if ((mode & FMODE_WRITE) && md->read_only) {
70bb0896 304 mmc_blk_put(md);
a00fc090 305 ret = -EROFS;
70bb0896 306 }
1da177e4 307 }
2a48fc0a 308 mutex_unlock(&block_mutex);
1da177e4
LT		 309
310 return ret;
311}
312
db2a144b 313static void mmc_blk_release(struct gendisk *disk, fmode_t mode)
1da177e4 314{
a5a1561f 315 struct mmc_blk_data *md = disk->private_data;
1da177e4 316
2a48fc0a 317 mutex_lock(&block_mutex);
1da177e4 318 mmc_blk_put(md);
2a48fc0a 319 mutex_unlock(&block_mutex);
1da177e4
LT		 320}
321
322static int
a885c8c4 323mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1da177e4 324{
a885c8c4
CH		 325 geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16);
326 geo->heads = 4;
327 geo->sectors = 16;
328 return 0;
1da177e4
LT		 329}
330
cb87ea28
JC		 331struct mmc_blk_ioc_data {
332 struct mmc_ioc_cmd ic;
333 unsigned char *buf;
334 u64 buf_bytes;
335};
336
337static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user(
338 struct mmc_ioc_cmd __user *user)
339{
340 struct mmc_blk_ioc_data *idata;
341 int err;
342
343 idata = kzalloc(sizeof(*idata), GFP_KERNEL);
344 if (!idata) {
345 err = -ENOMEM;
aea253ec 346 goto out;
cb87ea28
JC		 347 }
348
349 if (copy_from_user(&idata->ic, user, sizeof(idata->ic))) {
350 err = -EFAULT;
aea253ec 351 goto idata_err;
cb87ea28
JC		 352 }
353
354 idata->buf_bytes = (u64) idata->ic.blksz * idata->ic.blocks;
355 if (idata->buf_bytes > MMC_IOC_MAX_BYTES) {
356 err = -EOVERFLOW;
aea253ec 357 goto idata_err;
cb87ea28
JC		 358 }
359
4d6144de
JR		 360 if (!idata->buf_bytes)
361 return idata;
362
cb87ea28
JC		 363 idata->buf = kzalloc(idata->buf_bytes, GFP_KERNEL);
364 if (!idata->buf) {
365 err = -ENOMEM;
aea253ec 366 goto idata_err;
cb87ea28
JC		 367 }
368
369 if (copy_from_user(idata->buf, (void __user *)(unsigned long)
370 idata->ic.data_ptr, idata->buf_bytes)) {
371 err = -EFAULT;
372 goto copy_err;
373 }
374
375 return idata;
376
377copy_err:
378 kfree(idata->buf);
aea253ec 379idata_err:
cb87ea28 380 kfree(idata);
aea253ec 381out:
cb87ea28 382 return ERR_PTR(err);
cb87ea28
JC		 383}
384
8d1e977d
LP		 385static int ioctl_rpmb_card_status_poll(struct mmc_card *card, u32 *status,
386 u32 retries_max)
387{
388 int err;
389 u32 retry_count = 0;
390
391 if (!status || !retries_max)
392 return -EINVAL;
393
394 do {
395 err = get_card_status(card, status, 5);
396 if (err)
397 break;
398
399 if (!R1_STATUS(*status) &&
400 (R1_CURRENT_STATE(*status) != R1_STATE_PRG))
401 break; /* RPMB programming operation complete */
402
403 /*
404 * Rechedule to give the MMC device a chance to continue
405 * processing the previous command without being polled too
406 * frequently.
407 */
408 usleep_range(1000, 5000);
409 } while (++retry_count < retries_max);
410
411 if (retry_count == retries_max)
412 err = -EPERM;
413
414 return err;
415}
416
775a9362
ME		 417static int ioctl_do_sanitize(struct mmc_card *card)
418{
419 int err;
420
a2d1086d 421 if (!mmc_can_sanitize(card)) {
775a9362
ME		 422 pr_warn("%s: %s - SANITIZE is not supported\n",
423 mmc_hostname(card->host), __func__);
424 err = -EOPNOTSUPP;
425 goto out;
426 }
427
428 pr_debug("%s: %s - SANITIZE IN PROGRESS...\n",
429 mmc_hostname(card->host), __func__);
430
431 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
432 EXT_CSD_SANITIZE_START, 1,
433 MMC_SANITIZE_REQ_TIMEOUT);
434
435 if (err)
436 pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n",
437 mmc_hostname(card->host), __func__, err);
438
439 pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card->host),
440 __func__);
441out:
442 return err;
443}
444
cb87ea28
JC		 445static int mmc_blk_ioctl_cmd(struct block_device *bdev,
446 struct mmc_ioc_cmd __user *ic_ptr)
447{
448 struct mmc_blk_ioc_data *idata;
449 struct mmc_blk_data *md;
450 struct mmc_card *card;
451 struct mmc_command cmd = {0};
452 struct mmc_data data = {0};
ad5fd972 453 struct mmc_request mrq = {NULL};
cb87ea28
JC		 454 struct scatterlist sg;
455 int err;
8d1e977d
LP		 456 int is_rpmb = false;
457 u32 status = 0;
cb87ea28
JC		 458
459 /*
460 * The caller must have CAP_SYS_RAWIO, and must be calling this on the
461 * whole block device, not on a partition. This prevents overspray
462 * between sibling partitions.
463 */
464 if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
465 return -EPERM;
466
467 idata = mmc_blk_ioctl_copy_from_user(ic_ptr);
468 if (IS_ERR(idata))
469 return PTR_ERR(idata);
470
cb87ea28
JC		 471 md = mmc_blk_get(bdev->bd_disk);
472 if (!md) {
473 err = -EINVAL;
1c02f000 474 goto cmd_err;
cb87ea28
JC		 475 }
476
8d1e977d
LP		 477 if (md->area_type & MMC_BLK_DATA_AREA_RPMB)
478 is_rpmb = true;
479
cb87ea28
JC		 480 card = md->queue.card;
481 if (IS_ERR(card)) {
482 err = PTR_ERR(card);
483 goto cmd_done;
484 }
485
4d6144de
JR		 486 cmd.opcode = idata->ic.opcode;
487 cmd.arg = idata->ic.arg;
488 cmd.flags = idata->ic.flags;
489
490 if (idata->buf_bytes) {
491 data.sg = &sg;
492 data.sg_len = 1;
493 data.blksz = idata->ic.blksz;
494 data.blocks = idata->ic.blocks;
495
496 sg_init_one(data.sg, idata->buf, idata->buf_bytes);
497
498 if (idata->ic.write_flag)
499 data.flags = MMC_DATA_WRITE;
500 else
501 data.flags = MMC_DATA_READ;
502
503 /* data.flags must already be set before doing this. */
504 mmc_set_data_timeout(&data, card);
505
506 /* Allow overriding the timeout_ns for empirical tuning. */
507 if (idata->ic.data_timeout_ns)
508 data.timeout_ns = idata->ic.data_timeout_ns;
509
510 if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
511 /*
512 * Pretend this is a data transfer and rely on the
513 * host driver to compute timeout. When all host
514 * drivers support cmd.cmd_timeout for R1B, this
515 * can be changed to:
516 *
517 * mrq.data = NULL;
518 * cmd.cmd_timeout = idata->ic.cmd_timeout_ms;
519 */
520 data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000;
521 }
522
523 mrq.data = &data;
524 }
525
526 mrq.cmd = &cmd;
527
e94cfef6 528 mmc_get_card(card);
cb87ea28 529
8d1e977d
LP		 530 err = mmc_blk_part_switch(card, md);
531 if (err)
532 goto cmd_rel_host;
533
cb87ea28
JC		 534 if (idata->ic.is_acmd) {
535 err = mmc_app_cmd(card->host, card);
536 if (err)
537 goto cmd_rel_host;
538 }
539
8d1e977d
LP		 540 if (is_rpmb) {
541 err = mmc_set_blockcount(card, data.blocks,
542 idata->ic.write_flag & (1 << 31));
543 if (err)
544 goto cmd_rel_host;
545 }
546
a82e484e
YG		 547 if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) &&
548 (cmd.opcode == MMC_SWITCH)) {
775a9362
ME		 549 err = ioctl_do_sanitize(card);
550
551 if (err)
552 pr_err("%s: ioctl_do_sanitize() failed. err = %d",
553 __func__, err);
554
555 goto cmd_rel_host;
556 }
557
cb87ea28
JC		 558 mmc_wait_for_req(card->host, &mrq);
559
560 if (cmd.error) {
561 dev_err(mmc_dev(card->host), "%s: cmd error %d\n",
562 __func__, cmd.error);
563 err = cmd.error;
564 goto cmd_rel_host;
565 }
566 if (data.error) {
567 dev_err(mmc_dev(card->host), "%s: data error %d\n",
568 __func__, data.error);
569 err = data.error;
570 goto cmd_rel_host;
571 }
572
573 /*
574 * According to the SD specs, some commands require a delay after
575 * issuing the command.
576 */
577 if (idata->ic.postsleep_min_us)
578 usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us);
579
580 if (copy_to_user(&(ic_ptr->response), cmd.resp, sizeof(cmd.resp))) {
581 err = -EFAULT;
582 goto cmd_rel_host;
583 }
584
585 if (!idata->ic.write_flag) {
586 if (copy_to_user((void __user *)(unsigned long) idata->ic.data_ptr,
587 idata->buf, idata->buf_bytes)) {
588 err = -EFAULT;
589 goto cmd_rel_host;
590 }
591 }
592
8d1e977d
LP		 593 if (is_rpmb) {
594 /*
595 * Ensure RPMB command has completed by polling CMD13
596 * "Send Status".
597 */
598 err = ioctl_rpmb_card_status_poll(card, &status, 5);
599 if (err)
600 dev_err(mmc_dev(card->host),
601 "%s: Card Status=0x%08X, error %d\n",
602 __func__, status, err);
603 }
604
cb87ea28 605cmd_rel_host:
e94cfef6 606 mmc_put_card(card);
cb87ea28
JC		 607
608cmd_done:
609 mmc_blk_put(md);
1c02f000 610cmd_err:
cb87ea28
JC		 611 kfree(idata->buf);
612 kfree(idata);
613 return err;
614}
615
616static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode,
617 unsigned int cmd, unsigned long arg)
618{
619 int ret = -EINVAL;
620 if (cmd == MMC_IOC_CMD)
621 ret = mmc_blk_ioctl_cmd(bdev, (struct mmc_ioc_cmd __user *)arg);
622 return ret;
623}
624
625#ifdef CONFIG_COMPAT
626static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode,
627 unsigned int cmd, unsigned long arg)
628{
629 return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg));
630}
631#endif
632
83d5cde4 633static const struct block_device_operations mmc_bdops = {
a5a1561f
AV		 634 .open = mmc_blk_open,
635 .release = mmc_blk_release,
a885c8c4 636 .getgeo = mmc_blk_getgeo,
1da177e4 637 .owner = THIS_MODULE,
cb87ea28
JC		 638 .ioctl = mmc_blk_ioctl,
639#ifdef CONFIG_COMPAT
640 .compat_ioctl = mmc_blk_compat_ioctl,
641#endif
1da177e4
LT		 642};
643
371a689f
AW		 644static inline int mmc_blk_part_switch(struct mmc_card *card,
645 struct mmc_blk_data *md)
646{
647 int ret;
fc95e30b 648 struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev);
0d7d85ca 649
371a689f
AW		 650 if (main_md->part_curr == md->part_type)
651 return 0;
652
653 if (mmc_card_mmc(card)) {
0d7d85ca
AH		 654 u8 part_config = card->ext_csd.part_config;
655
656 part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
657 part_config |= md->part_type;
371a689f
AW		 658
659 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
0d7d85ca 660 EXT_CSD_PART_CONFIG, part_config,
371a689f
AW		 661 card->ext_csd.part_time);
662 if (ret)
663 return ret;
0d7d85ca
AH		 664
665 card->ext_csd.part_config = part_config;
67716327 666 }
371a689f
AW		 667
668 main_md->part_curr = md->part_type;
669 return 0;
670}
671
ec5a19dd
PO		 672static u32 mmc_sd_num_wr_blocks(struct mmc_card *card)
673{
674 int err;
051913da
BD		 675 u32 result;
676 __be32 *blocks;
ec5a19dd 677
ad5fd972 678 struct mmc_request mrq = {NULL};
1278dba1 679 struct mmc_command cmd = {0};
a61ad2b4 680 struct mmc_data data = {0};
ec5a19dd
PO		 681
682 struct scatterlist sg;
683
ec5a19dd
PO		 684 cmd.opcode = MMC_APP_CMD;
685 cmd.arg = card->rca << 16;
7213d175 686 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
ec5a19dd
PO		 687
688 err = mmc_wait_for_cmd(card->host, &cmd, 0);
7213d175
DB		 689 if (err)
690 return (u32)-1;
691 if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD))
ec5a19dd
PO		 692 return (u32)-1;
693
694 memset(&cmd, 0, sizeof(struct mmc_command));
695
696 cmd.opcode = SD_APP_SEND_NUM_WR_BLKS;
697 cmd.arg = 0;
7213d175 698 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
ec5a19dd 699
ec5a19dd
PO		 700 data.blksz = 4;
701 data.blocks = 1;
702 data.flags = MMC_DATA_READ;
703 data.sg = &sg;
704 data.sg_len = 1;
d380443c 705 mmc_set_data_timeout(&data, card);
ec5a19dd 706
ec5a19dd
PO		 707 mrq.cmd = &cmd;
708 mrq.data = &data;
709
051913da
BD		 710 blocks = kmalloc(4, GFP_KERNEL);
711 if (!blocks)
712 return (u32)-1;
713
714 sg_init_one(&sg, blocks, 4);
ec5a19dd
PO		 715
716 mmc_wait_for_req(card->host, &mrq);
717
051913da
BD		 718 result = ntohl(*blocks);
719 kfree(blocks);
720
17b0429d 721 if (cmd.error || data.error)
051913da 722 result = (u32)-1;
ec5a19dd 723
051913da 724 return result;
ec5a19dd
PO		 725}
726
0a2d4048 727static int get_card_status(struct mmc_card *card, u32 *status, int retries)
504f191f 728{
1278dba1 729 struct mmc_command cmd = {0};
504f191f
AH		 730 int err;
731
504f191f
AH		 732 cmd.opcode = MMC_SEND_STATUS;
733 if (!mmc_host_is_spi(card->host))
734 cmd.arg = card->rca << 16;
735 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
0a2d4048
RKAL		 736 err = mmc_wait_for_cmd(card->host, &cmd, retries);
737 if (err == 0)
738 *status = cmd.resp[0];
739 return err;
504f191f
AH		 740}
741
c49433fb 742static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms,
95a91298 743 bool hw_busy_detect, struct request *req, int *gen_err)
c49433fb
UH		 744{
745 unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
746 int err = 0;
747 u32 status;
748
749 do {
750 err = get_card_status(card, &status, 5);
751 if (err) {
752 pr_err("%s: error %d requesting status\n",
753 req->rq_disk->disk_name, err);
754 return err;
755 }
756
757 if (status & R1_ERROR) {
758 pr_err("%s: %s: error sending status cmd, status %#x\n",
759 req->rq_disk->disk_name, __func__, status);
760 *gen_err = 1;
761 }
762
95a91298
UH		 763 /* We may rely on the host hw to handle busy detection.*/
764 if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) &&
765 hw_busy_detect)
766 break;
767
c49433fb
UH		 768 /*
769 * Timeout if the device never becomes ready for data and never
770 * leaves the program state.
771 */
772 if (time_after(jiffies, timeout)) {
773 pr_err("%s: Card stuck in programming state! %s %s\n",
774 mmc_hostname(card->host),
775 req->rq_disk->disk_name, __func__);
776 return -ETIMEDOUT;
777 }
778
779 /*
780 * Some cards mishandle the status bits,
781 * so make sure to check both the busy
782 * indication and the card state.
783 */
784 } while (!(status & R1_READY_FOR_DATA) ||
785 (R1_CURRENT_STATE(status) == R1_STATE_PRG));
786
787 return err;
788}
789
bb5cba40
UH		 790static int send_stop(struct mmc_card *card, unsigned int timeout_ms,
791 struct request *req, int *gen_err, u32 *stop_status)
792{
793 struct mmc_host *host = card->host;
794 struct mmc_command cmd = {0};
795 int err;
796 bool use_r1b_resp = rq_data_dir(req) == WRITE;
797
798 /*
799 * Normally we use R1B responses for WRITE, but in cases where the host
800 * has specified a max_busy_timeout we need to validate it. A failure
801 * means we need to prevent the host from doing hw busy detection, which
802 * is done by converting to a R1 response instead.
803 */
804 if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout))
805 use_r1b_resp = false;
806
807 cmd.opcode = MMC_STOP_TRANSMISSION;
808 if (use_r1b_resp) {
809 cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
810 cmd.busy_timeout = timeout_ms;
811 } else {
812 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
813 }
814
815 err = mmc_wait_for_cmd(host, &cmd, 5);
816 if (err)
817 return err;
818
819 *stop_status = cmd.resp[0];
820
821 /* No need to check card status in case of READ. */
822 if (rq_data_dir(req) == READ)
823 return 0;
824
825 if (!mmc_host_is_spi(host) &&
826 (*stop_status & R1_ERROR)) {
827 pr_err("%s: %s: general error sending stop command, resp %#x\n",
828 req->rq_disk->disk_name, __func__, *stop_status);
829 *gen_err = 1;
830 }
831
832 return card_busy_detect(card, timeout_ms, use_r1b_resp, req, gen_err);
833}
834
a8ad82cc 835#define ERR_NOMEDIUM 3
a01f3ccf
RKAL		 836#define ERR_RETRY 2
837#define ERR_ABORT 1
838#define ERR_CONTINUE 0
839
840static int mmc_blk_cmd_error(struct request *req, const char *name, int error,
841 bool status_valid, u32 status)
842{
843 switch (error) {
844 case -EILSEQ:
845 /* response crc error, retry the r/w cmd */
846 pr_err("%s: %s sending %s command, card status %#x\n",
847 req->rq_disk->disk_name, "response CRC error",
848 name, status);
849 return ERR_RETRY;
850
851 case -ETIMEDOUT:
852 pr_err("%s: %s sending %s command, card status %#x\n",
853 req->rq_disk->disk_name, "timed out", name, status);
854
855 /* If the status cmd initially failed, retry the r/w cmd */
856 if (!status_valid)
857 return ERR_RETRY;
858
859 /*
860 * If it was a r/w cmd crc error, or illegal command
861 * (eg, issued in wrong state) then retry - we should
862 * have corrected the state problem above.
863 */
864 if (status & (R1_COM_CRC_ERROR | R1_ILLEGAL_COMMAND))
865 return ERR_RETRY;
866
867 /* Otherwise abort the command */
868 return ERR_ABORT;
869
870 default:
871 /* We don't understand the error code the driver gave us */
872 pr_err("%s: unknown error %d sending read/write command, card status %#x\n",
873 req->rq_disk->disk_name, error, status);
874 return ERR_ABORT;
875 }
876}
877
878/*
879 * Initial r/w and stop cmd error recovery.
880 * We don't know whether the card received the r/w cmd or not, so try to
881 * restore things back to a sane state. Essentially, we do this as follows:
882 * - Obtain card status. If the first attempt to obtain card status fails,
883 * the status word will reflect the failed status cmd, not the failed
884 * r/w cmd. If we fail to obtain card status, it suggests we can no
885 * longer communicate with the card.
886 * - Check the card state. If the card received the cmd but there was a
887 * transient problem with the response, it might still be in a data transfer
888 * mode. Try to send it a stop command. If this fails, we can't recover.
889 * - If the r/w cmd failed due to a response CRC error, it was probably
890 * transient, so retry the cmd.
891 * - If the r/w cmd timed out, but we didn't get the r/w cmd status, retry.
892 * - If the r/w cmd timed out, and the r/w cmd failed due to CRC error or
893 * illegal cmd, retry.
894 * Otherwise we don't understand what happened, so abort.
895 */
896static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req,
c8760069 897 struct mmc_blk_request *brq, int *ecc_err, int *gen_err)
a01f3ccf
RKAL		 898{
899 bool prev_cmd_status_valid = true;
900 u32 status, stop_status = 0;
901 int err, retry;
902
a8ad82cc
SRT		 903 if (mmc_card_removed(card))
904 return ERR_NOMEDIUM;
905
a01f3ccf
RKAL		 906 /*
907 * Try to get card status which indicates both the card state
908 * and why there was no response. If the first attempt fails,
909 * we can't be sure the returned status is for the r/w command.
910 */
911 for (retry = 2; retry >= 0; retry--) {
912 err = get_card_status(card, &status, 0);
913 if (!err)
914 break;
915
916 prev_cmd_status_valid = false;
917 pr_err("%s: error %d sending status command, %sing\n",
918 req->rq_disk->disk_name, err, retry ? "retry" : "abort");
919 }
920
921 /* We couldn't get a response from the card. Give up. */
a8ad82cc
SRT		 922 if (err) {
923 /* Check if the card is removed */
924 if (mmc_detect_card_removed(card->host))
925 return ERR_NOMEDIUM;
a01f3ccf 926 return ERR_ABORT;
a8ad82cc 927 }
a01f3ccf 928
67716327
AH		 929 /* Flag ECC errors */
930 if ((status & R1_CARD_ECC_FAILED) ||
931 (brq->stop.resp[0] & R1_CARD_ECC_FAILED) ||
932 (brq->cmd.resp[0] & R1_CARD_ECC_FAILED))
933 *ecc_err = 1;
934
c8760069
KY		 935 /* Flag General errors */
936 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ)
937 if ((status & R1_ERROR) ||
938 (brq->stop.resp[0] & R1_ERROR)) {
939 pr_err("%s: %s: general error sending stop or status command, stop cmd response %#x, card status %#x\n",
940 req->rq_disk->disk_name, __func__,
941 brq->stop.resp[0], status);
942 *gen_err = 1;
943 }
944
a01f3ccf
RKAL		 945 /*
946 * Check the current card state. If it is in some data transfer
947 * mode, tell it to stop (and hopefully transition back to TRAN.)
948 */
949 if (R1_CURRENT_STATE(status) == R1_STATE_DATA ||
950 R1_CURRENT_STATE(status) == R1_STATE_RCV) {
bb5cba40
UH		 951 err = send_stop(card,
952 DIV_ROUND_UP(brq->data.timeout_ns, 1000000),
953 req, gen_err, &stop_status);
954 if (err) {
a01f3ccf
RKAL		 955 pr_err("%s: error %d sending stop command\n",
956 req->rq_disk->disk_name, err);
bb5cba40
UH		 957 /*
958 * If the stop cmd also timed out, the card is probably
959 * not present, so abort. Other errors are bad news too.
960 */
a01f3ccf 961 return ERR_ABORT;
bb5cba40
UH		 962 }
963
67716327
AH		 964 if (stop_status & R1_CARD_ECC_FAILED)
965 *ecc_err = 1;
a01f3ccf
RKAL		 966 }
967
968 /* Check for set block count errors */
969 if (brq->sbc.error)
970 return mmc_blk_cmd_error(req, "SET_BLOCK_COUNT", brq->sbc.error,
971 prev_cmd_status_valid, status);
972
973 /* Check for r/w command errors */
974 if (brq->cmd.error)
975 return mmc_blk_cmd_error(req, "r/w cmd", brq->cmd.error,
976 prev_cmd_status_valid, status);
977
67716327
AH		 978 /* Data errors */
979 if (!brq->stop.error)
980 return ERR_CONTINUE;
981
a01f3ccf 982 /* Now for stop errors. These aren't fatal to the transfer. */
5e1344eb 983 pr_info("%s: error %d sending stop command, original cmd response %#x, card status %#x\n",
a01f3ccf
RKAL		 984 req->rq_disk->disk_name, brq->stop.error,
985 brq->cmd.resp[0], status);
986
987 /*
988 * Subsitute in our own stop status as this will give the error
989 * state which happened during the execution of the r/w command.
990 */
991 if (stop_status) {
992 brq->stop.resp[0] = stop_status;
993 brq->stop.error = 0;
994 }
995 return ERR_CONTINUE;
996}
997
67716327
AH		 998static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host,
999 int type)
1000{
1001 int err;
1002
1003 if (md->reset_done & type)
1004 return -EEXIST;
1005
1006 md->reset_done |= type;
1007 err = mmc_hw_reset(host);
1008 /* Ensure we switch back to the correct partition */
1009 if (err != -EOPNOTSUPP) {
fc95e30b
UH		 1010 struct mmc_blk_data *main_md =
1011 dev_get_drvdata(&host->card->dev);
67716327
AH		 1012 int part_err;
1013
1014 main_md->part_curr = main_md->part_type;
1015 part_err = mmc_blk_part_switch(host->card, md);
1016 if (part_err) {
1017 /*
1018 * We have failed to get back into the correct
1019 * partition, so we need to abort the whole request.
1020 */
1021 return -ENODEV;
1022 }
1023 }
1024 return err;
1025}
1026
1027static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type)
1028{
1029 md->reset_done &= ~type;
1030}
1031
4e93b9a6
CD		 1032int mmc_access_rpmb(struct mmc_queue *mq)
1033{
1034 struct mmc_blk_data *md = mq->data;
1035 /*
1036 * If this is a RPMB partition access, return ture
1037 */
1038 if (md && md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
1039 return true;
1040
1041 return false;
1042}
1043
bd788c96
AH		 1044static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
1045{
1046 struct mmc_blk_data *md = mq->data;
1047 struct mmc_card *card = md->queue.card;
1048 unsigned int from, nr, arg;
67716327 1049 int err = 0, type = MMC_BLK_DISCARD;
bd788c96 1050
bd788c96
AH		 1051 if (!mmc_can_erase(card)) {
1052 err = -EOPNOTSUPP;
1053 goto out;
1054 }
1055
1056 from = blk_rq_pos(req);
1057 nr = blk_rq_sectors(req);
1058
b3bf9153
KP		 1059 if (mmc_can_discard(card))
1060 arg = MMC_DISCARD_ARG;
1061 else if (mmc_can_trim(card))
bd788c96
AH		 1062 arg = MMC_TRIM_ARG;
1063 else
1064 arg = MMC_ERASE_ARG;
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_TRIM_ARG ?
1070 INAND_CMD38_ARG_TRIM :
1071 INAND_CMD38_ARG_ERASE,
1072 0);
1073 if (err)
1074 goto out;
1075 }
bd788c96
AH		 1076 err = mmc_erase(card, from, nr, arg);
1077out:
67716327
AH		 1078 if (err == -EIO && !mmc_blk_reset(md, card->host, type))
1079 goto retry;
1080 if (!err)
1081 mmc_blk_reset_success(md, type);
ecf8b5d0 1082 blk_end_request(req, err, blk_rq_bytes(req));
bd788c96 1083
bd788c96
AH		 1084 return err ? 0 : 1;
1085}
1086
49804548
AH		 1087static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
1088 struct request *req)
1089{
1090 struct mmc_blk_data *md = mq->data;
1091 struct mmc_card *card = md->queue.card;
775a9362 1092 unsigned int from, nr, arg;
67716327 1093 int err = 0, type = MMC_BLK_SECDISCARD;
49804548 1094
775a9362 1095 if (!(mmc_can_secure_erase_trim(card))) {
49804548
AH		 1096 err = -EOPNOTSUPP;
1097 goto out;
1098 }
1099
28302812
AH		 1100 from = blk_rq_pos(req);
1101 nr = blk_rq_sectors(req);
1102
775a9362
ME		 1103 if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr))
1104 arg = MMC_SECURE_TRIM1_ARG;
1105 else
1106 arg = MMC_SECURE_ERASE_ARG;
d9ddd629 1107
67716327 1108retry:
6a7a6b45
AW		 1109 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1110 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1111 INAND_CMD38_ARG_EXT_CSD,
1112 arg == MMC_SECURE_TRIM1_ARG ?
1113 INAND_CMD38_ARG_SECTRIM1 :
1114 INAND_CMD38_ARG_SECERASE,
1115 0);
1116 if (err)
28302812 1117 goto out_retry;
6a7a6b45 1118 }
28302812 1119
49804548 1120 err = mmc_erase(card, from, nr, arg);
28302812
AH		 1121 if (err == -EIO)
1122 goto out_retry;
1123 if (err)
1124 goto out;
1125
1126 if (arg == MMC_SECURE_TRIM1_ARG) {
6a7a6b45
AW		 1127 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1128 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1129 INAND_CMD38_ARG_EXT_CSD,
1130 INAND_CMD38_ARG_SECTRIM2,
1131 0);
1132 if (err)
28302812 1133 goto out_retry;
6a7a6b45 1134 }
28302812 1135
49804548 1136 err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG);
28302812
AH		 1137 if (err == -EIO)
1138 goto out_retry;
1139 if (err)
1140 goto out;
6a7a6b45 1141 }
28302812 1142
28302812
AH		 1143out_retry:
1144 if (err && !mmc_blk_reset(md, card->host, type))
67716327
AH		 1145 goto retry;
1146 if (!err)
1147 mmc_blk_reset_success(md, type);
28302812 1148out:
ecf8b5d0 1149 blk_end_request(req, err, blk_rq_bytes(req));
49804548 1150
49804548
AH		 1151 return err ? 0 : 1;
1152}
1153
f4c5522b
AW		 1154static int mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req)
1155{
1156 struct mmc_blk_data *md = mq->data;
881d1c25
SJ		 1157 struct mmc_card *card = md->queue.card;
1158 int ret = 0;
1159
1160 ret = mmc_flush_cache(card);
1161 if (ret)
1162 ret = -EIO;
f4c5522b 1163
ecf8b5d0 1164 blk_end_request_all(req, ret);
f4c5522b 1165
881d1c25 1166 return ret ? 0 : 1;
f4c5522b
AW		 1167}
1168
1169/*
1170 * Reformat current write as a reliable write, supporting
1171 * both legacy and the enhanced reliable write MMC cards.
1172 * In each transfer we'll handle only as much as a single
1173 * reliable write can handle, thus finish the request in
1174 * partial completions.
1175 */
d0c97cfb
AW		 1176static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq,
1177 struct mmc_card *card,
1178 struct request *req)
f4c5522b 1179{
f4c5522b
AW		 1180 if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) {
1181 /* Legacy mode imposes restrictions on transfers. */
1182 if (!IS_ALIGNED(brq->cmd.arg, card->ext_csd.rel_sectors))
1183 brq->data.blocks = 1;
1184
1185 if (brq->data.blocks > card->ext_csd.rel_sectors)
1186 brq->data.blocks = card->ext_csd.rel_sectors;
1187 else if (brq->data.blocks < card->ext_csd.rel_sectors)
1188 brq->data.blocks = 1;
1189 }
f4c5522b
AW		 1190}
1191
4c2b8f26
RKAL		 1192#define CMD_ERRORS \
1193 (R1_OUT_OF_RANGE | /* Command argument out of range */ \
1194 R1_ADDRESS_ERROR | /* Misaligned address */ \
1195 R1_BLOCK_LEN_ERROR | /* Transferred block length incorrect */\
1196 R1_WP_VIOLATION | /* Tried to write to protected block */ \
1197 R1_CC_ERROR | /* Card controller error */ \
1198 R1_ERROR) /* General/unknown error */
1199
ee8a43a5
PF		 1200static int mmc_blk_err_check(struct mmc_card *card,
1201 struct mmc_async_req *areq)
d78d4a8a 1202{
ee8a43a5
PF		 1203 struct mmc_queue_req *mq_mrq = container_of(areq, struct mmc_queue_req,
1204 mmc_active);
1205 struct mmc_blk_request *brq = &mq_mrq->brq;
1206 struct request *req = mq_mrq->req;
c8760069 1207 int ecc_err = 0, gen_err = 0;
d78d4a8a
PF		 1208
1209 /*
1210 * sbc.error indicates a problem with the set block count
1211 * command. No data will have been transferred.
1212 *
1213 * cmd.error indicates a problem with the r/w command. No
1214 * data will have been transferred.
1215 *
1216 * stop.error indicates a problem with the stop command. Data
1217 * may have been transferred, or may still be transferring.
1218 */
67716327
AH		 1219 if (brq->sbc.error || brq->cmd.error || brq->stop.error ||
1220 brq->data.error) {
c8760069 1221 switch (mmc_blk_cmd_recovery(card, req, brq, &ecc_err, &gen_err)) {
d78d4a8a
PF		 1222 case ERR_RETRY:
1223 return MMC_BLK_RETRY;
1224 case ERR_ABORT:
1225 return MMC_BLK_ABORT;
a8ad82cc
SRT		 1226 case ERR_NOMEDIUM:
1227 return MMC_BLK_NOMEDIUM;
d78d4a8a
PF		 1228 case ERR_CONTINUE:
1229 break;
1230 }
1231 }
1232
1233 /*
1234 * Check for errors relating to the execution of the
1235 * initial command - such as address errors. No data
1236 * has been transferred.
1237 */
1238 if (brq->cmd.resp[0] & CMD_ERRORS) {
1239 pr_err("%s: r/w command failed, status = %#x\n",
1240 req->rq_disk->disk_name, brq->cmd.resp[0]);
1241 return MMC_BLK_ABORT;
1242 }
1243
1244 /*
1245 * Everything else is either success, or a data error of some
1246 * kind. If it was a write, we may have transitioned to
1247 * program mode, which we have to wait for it to complete.
1248 */
1249 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) {
c49433fb 1250 int err;
8fee476b 1251
c8760069
KY		 1252 /* Check stop command response */
1253 if (brq->stop.resp[0] & R1_ERROR) {
1254 pr_err("%s: %s: general error sending stop command, stop cmd response %#x\n",
1255 req->rq_disk->disk_name, __func__,
1256 brq->stop.resp[0]);
1257 gen_err = 1;
1258 }
1259
95a91298
UH		 1260 err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, false, req,
1261 &gen_err);
c49433fb
UH		 1262 if (err)
1263 return MMC_BLK_CMD_ERR;
d78d4a8a
PF		 1264 }
1265
c8760069
KY		 1266 /* if general error occurs, retry the write operation. */
1267 if (gen_err) {
1268 pr_warn("%s: retrying write for general error\n",
1269 req->rq_disk->disk_name);
1270 return MMC_BLK_RETRY;
1271 }
1272
d78d4a8a
PF		 1273 if (brq->data.error) {
1274 pr_err("%s: error %d transferring data, sector %u, nr %u, cmd response %#x, card status %#x\n",
1275 req->rq_disk->disk_name, brq->data.error,
1276 (unsigned)blk_rq_pos(req),
1277 (unsigned)blk_rq_sectors(req),
1278 brq->cmd.resp[0], brq->stop.resp[0]);
1279
1280 if (rq_data_dir(req) == READ) {
67716327
AH		 1281 if (ecc_err)
1282 return MMC_BLK_ECC_ERR;
d78d4a8a
PF		 1283 return MMC_BLK_DATA_ERR;
1284 } else {
1285 return MMC_BLK_CMD_ERR;
1286 }
1287 }
1288
67716327
AH		 1289 if (!brq->data.bytes_xfered)
1290 return MMC_BLK_RETRY;
d78d4a8a 1291
ce39f9d1
SJ		 1292 if (mmc_packed_cmd(mq_mrq->cmd_type)) {
1293 if (unlikely(brq->data.blocks << 9 != brq->data.bytes_xfered))
1294 return MMC_BLK_PARTIAL;
1295 else
1296 return MMC_BLK_SUCCESS;
1297 }
1298
67716327
AH		 1299 if (blk_rq_bytes(req) != brq->data.bytes_xfered)
1300 return MMC_BLK_PARTIAL;
1301
1302 return MMC_BLK_SUCCESS;
d78d4a8a
PF		 1303}
1304
ce39f9d1
SJ		 1305static int mmc_blk_packed_err_check(struct mmc_card *card,
1306 struct mmc_async_req *areq)
1307{
1308 struct mmc_queue_req *mq_rq = container_of(areq, struct mmc_queue_req,
1309 mmc_active);
1310 struct request *req = mq_rq->req;
1311 struct mmc_packed *packed = mq_rq->packed;
1312 int err, check, status;
1313 u8 *ext_csd;
1314
1315 BUG_ON(!packed);
1316
1317 packed->retries--;
1318 check = mmc_blk_err_check(card, areq);
1319 err = get_card_status(card, &status, 0);
1320 if (err) {
1321 pr_err("%s: error %d sending status command\n",
1322 req->rq_disk->disk_name, err);
1323 return MMC_BLK_ABORT;
1324 }
1325
1326 if (status & R1_EXCEPTION_EVENT) {
86817ffb 1327 err = mmc_get_ext_csd(card, &ext_csd);
ce39f9d1
SJ		 1328 if (err) {
1329 pr_err("%s: error %d sending ext_csd\n",
1330 req->rq_disk->disk_name, err);
86817ffb 1331 return MMC_BLK_ABORT;
ce39f9d1
SJ		 1332 }
1333
1334 if ((ext_csd[EXT_CSD_EXP_EVENTS_STATUS] &
1335 EXT_CSD_PACKED_FAILURE) &&
1336 (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1337 EXT_CSD_PACKED_GENERIC_ERROR)) {
1338 if (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1339 EXT_CSD_PACKED_INDEXED_ERROR) {
1340 packed->idx_failure =
1341 ext_csd[EXT_CSD_PACKED_FAILURE_INDEX] - 1;
1342 check = MMC_BLK_PARTIAL;
1343 }
1344 pr_err("%s: packed cmd failed, nr %u, sectors %u, "
1345 "failure index: %d\n",
1346 req->rq_disk->disk_name, packed->nr_entries,
1347 packed->blocks, packed->idx_failure);
1348 }
ce39f9d1
SJ		 1349 kfree(ext_csd);
1350 }
1351
1352 return check;
1353}
1354
54d49d77
PF		 1355static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
1356 struct mmc_card *card,
1357 int disable_multi,
1358 struct mmc_queue *mq)
1da177e4 1359{
54d49d77
PF		 1360 u32 readcmd, writecmd;
1361 struct mmc_blk_request *brq = &mqrq->brq;
1362 struct request *req = mqrq->req;
1da177e4 1363 struct mmc_blk_data *md = mq->data;
4265900e 1364 bool do_data_tag;
1da177e4 1365
f4c5522b
AW		 1366 /*
1367 * Reliable writes are used to implement Forced Unit Access and
1368 * REQ_META accesses, and are supported only on MMCs.
65299a3b
CH		 1369 *
1370 * XXX: this really needs a good explanation of why REQ_META
1371 * is treated special.
f4c5522b
AW		 1372 */
1373 bool do_rel_wr = ((req->cmd_flags & REQ_FUA) ||
1374 (req->cmd_flags & REQ_META)) &&
1375 (rq_data_dir(req) == WRITE) &&
d0c97cfb 1376 (md->flags & MMC_BLK_REL_WR);
f4c5522b 1377
54d49d77
PF		 1378 memset(brq, 0, sizeof(struct mmc_blk_request));
1379 brq->mrq.cmd = &brq->cmd;
1380 brq->mrq.data = &brq->data;
1da177e4 1381
54d49d77
PF		 1382 brq->cmd.arg = blk_rq_pos(req);
1383 if (!mmc_card_blockaddr(card))
1384 brq->cmd.arg <<= 9;
1385 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1386 brq->data.blksz = 512;
1387 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1388 brq->stop.arg = 0;
54d49d77 1389 brq->data.blocks = blk_rq_sectors(req);
6a79e391 1390
54d49d77
PF		 1391 /*
1392 * The block layer doesn't support all sector count
1393 * restrictions, so we need to be prepared for too big
1394 * requests.
1395 */
1396 if (brq->data.blocks > card->host->max_blk_count)
1397 brq->data.blocks = card->host->max_blk_count;
1da177e4 1398
2bf22b39
PW		 1399 if (brq->data.blocks > 1) {
1400 /*
1401 * After a read error, we redo the request one sector
1402 * at a time in order to accurately determine which
1403 * sectors can be read successfully.
1404 */
1405 if (disable_multi)
1406 brq->data.blocks = 1;
1407
2e47e842
KM		 1408 /*
1409 * Some controllers have HW issues while operating
1410 * in multiple I/O mode
1411 */
1412 if (card->host->ops->multi_io_quirk)
1413 brq->data.blocks = card->host->ops->multi_io_quirk(card,
1414 (rq_data_dir(req) == READ) ?
1415 MMC_DATA_READ : MMC_DATA_WRITE,
1416 brq->data.blocks);
2bf22b39 1417 }
d0c97cfb 1418
54d49d77
PF		 1419 if (brq->data.blocks > 1 || do_rel_wr) {
1420 /* SPI multiblock writes terminate using a special
1421 * token, not a STOP_TRANSMISSION request.
d0c97cfb 1422 */
54d49d77
PF		 1423 if (!mmc_host_is_spi(card->host) ||
1424 rq_data_dir(req) == READ)
1425 brq->mrq.stop = &brq->stop;
1426 readcmd = MMC_READ_MULTIPLE_BLOCK;
1427 writecmd = MMC_WRITE_MULTIPLE_BLOCK;
1428 } else {
1429 brq->mrq.stop = NULL;
1430 readcmd = MMC_READ_SINGLE_BLOCK;
1431 writecmd = MMC_WRITE_BLOCK;
1432 }
1433 if (rq_data_dir(req) == READ) {
1434 brq->cmd.opcode = readcmd;
1435 brq->data.flags |= MMC_DATA_READ;
bcc3e172
UH		 1436 if (brq->mrq.stop)
1437 brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 |
1438 MMC_CMD_AC;
54d49d77
PF		 1439 } else {
1440 brq->cmd.opcode = writecmd;
1441 brq->data.flags |= MMC_DATA_WRITE;
bcc3e172
UH		 1442 if (brq->mrq.stop)
1443 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B |
1444 MMC_CMD_AC;
54d49d77 1445 }
d0c97cfb 1446
54d49d77
PF		 1447 if (do_rel_wr)
1448 mmc_apply_rel_rw(brq, card, req);
f4c5522b 1449
4265900e
SD		 1450 /*
1451 * Data tag is used only during writing meta data to speed
1452 * up write and any subsequent read of this meta data
1453 */
1454 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1455 (req->cmd_flags & REQ_META) &&
1456 (rq_data_dir(req) == WRITE) &&
1457 ((brq->data.blocks * brq->data.blksz) >=
1458 card->ext_csd.data_tag_unit_size);
1459
54d49d77
PF		 1460 /*
1461 * Pre-defined multi-block transfers are preferable to
1462 * open ended-ones (and necessary for reliable writes).
1463 * However, it is not sufficient to just send CMD23,
1464 * and avoid the final CMD12, as on an error condition
1465 * CMD12 (stop) needs to be sent anyway. This, coupled
1466 * with Auto-CMD23 enhancements provided by some
1467 * hosts, means that the complexity of dealing
1468 * with this is best left to the host. If CMD23 is
1469 * supported by card and host, we'll fill sbc in and let
1470 * the host deal with handling it correctly. This means
1471 * that for hosts that don't expose MMC_CAP_CMD23, no
1472 * change of behavior will be observed.
1473 *
1474 * N.B: Some MMC cards experience perf degradation.
1475 * We'll avoid using CMD23-bounded multiblock writes for
1476 * these, while retaining features like reliable writes.
1477 */
4265900e
SD		 1478 if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) &&
1479 (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) ||
1480 do_data_tag)) {
54d49d77
PF		 1481 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1482 brq->sbc.arg = brq->data.blocks |
4265900e
SD		 1483 (do_rel_wr ? (1 << 31) : 0) |
1484 (do_data_tag ? (1 << 29) : 0);
54d49d77
PF		 1485 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1486 brq->mrq.sbc = &brq->sbc;
1487 }
98ccf149 1488
54d49d77
PF		 1489 mmc_set_data_timeout(&brq->data, card);
1490
1491 brq->data.sg = mqrq->sg;
1492 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1493
1494 /*
1495 * Adjust the sg list so it is the same size as the
1496 * request.
1497 */
1498 if (brq->data.blocks != blk_rq_sectors(req)) {
1499 int i, data_size = brq->data.blocks << 9;
1500 struct scatterlist *sg;
1501
1502 for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) {
1503 data_size -= sg->length;
1504 if (data_size <= 0) {
1505 sg->length += data_size;
1506 i++;
1507 break;
6a79e391 1508 }
6a79e391 1509 }
54d49d77
PF		 1510 brq->data.sg_len = i;
1511 }
1512
ee8a43a5
PF		 1513 mqrq->mmc_active.mrq = &brq->mrq;
1514 mqrq->mmc_active.err_check = mmc_blk_err_check;
1515
54d49d77
PF		 1516 mmc_queue_bounce_pre(mqrq);
1517}
6a79e391 1518
ce39f9d1
SJ		 1519static inline u8 mmc_calc_packed_hdr_segs(struct request_queue *q,
1520 struct mmc_card *card)
1521{
1522 unsigned int hdr_sz = mmc_large_sector(card) ? 4096 : 512;
1523 unsigned int max_seg_sz = queue_max_segment_size(q);
1524 unsigned int len, nr_segs = 0;
1525
1526 do {
1527 len = min(hdr_sz, max_seg_sz);
1528 hdr_sz -= len;
1529 nr_segs++;
1530 } while (hdr_sz);
1531
1532 return nr_segs;
1533}
1534
1535static u8 mmc_blk_prep_packed_list(struct mmc_queue *mq, struct request *req)
1536{
1537 struct request_queue *q = mq->queue;
1538 struct mmc_card *card = mq->card;
1539 struct request *cur = req, *next = NULL;
1540 struct mmc_blk_data *md = mq->data;
1541 struct mmc_queue_req *mqrq = mq->mqrq_cur;
1542 bool en_rel_wr = card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN;
1543 unsigned int req_sectors = 0, phys_segments = 0;
1544 unsigned int max_blk_count, max_phys_segs;
1545 bool put_back = true;
1546 u8 max_packed_rw = 0;
1547 u8 reqs = 0;
1548
1549 if (!(md->flags & MMC_BLK_PACKED_CMD))
1550 goto no_packed;
1551
1552 if ((rq_data_dir(cur) == WRITE) &&
1553 mmc_host_packed_wr(card->host))
1554 max_packed_rw = card->ext_csd.max_packed_writes;
1555
1556 if (max_packed_rw == 0)
1557 goto no_packed;
1558
1559 if (mmc_req_rel_wr(cur) &&
1560 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1561 goto no_packed;
1562
1563 if (mmc_large_sector(card) &&
1564 !IS_ALIGNED(blk_rq_sectors(cur), 8))
1565 goto no_packed;
1566
1567 mmc_blk_clear_packed(mqrq);
1568
1569 max_blk_count = min(card->host->max_blk_count,
1570 card->host->max_req_size >> 9);
1571 if (unlikely(max_blk_count > 0xffff))
1572 max_blk_count = 0xffff;
1573
1574 max_phys_segs = queue_max_segments(q);
1575 req_sectors += blk_rq_sectors(cur);
1576 phys_segments += cur->nr_phys_segments;
1577
1578 if (rq_data_dir(cur) == WRITE) {
1579 req_sectors += mmc_large_sector(card) ? 8 : 1;
1580 phys_segments += mmc_calc_packed_hdr_segs(q, card);
1581 }
1582
1583 do {
1584 if (reqs >= max_packed_rw - 1) {
1585 put_back = false;
1586 break;
1587 }
1588
1589 spin_lock_irq(q->queue_lock);
1590 next = blk_fetch_request(q);
1591 spin_unlock_irq(q->queue_lock);
1592 if (!next) {
1593 put_back = false;
1594 break;
1595 }
1596
1597 if (mmc_large_sector(card) &&
1598 !IS_ALIGNED(blk_rq_sectors(next), 8))
1599 break;
1600
1601 if (next->cmd_flags & REQ_DISCARD ||
1602 next->cmd_flags & REQ_FLUSH)
1603 break;
1604
1605 if (rq_data_dir(cur) != rq_data_dir(next))
1606 break;
1607
1608 if (mmc_req_rel_wr(next) &&
1609 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1610 break;
1611
1612 req_sectors += blk_rq_sectors(next);
1613 if (req_sectors > max_blk_count)
1614 break;
1615
1616 phys_segments += next->nr_phys_segments;
1617 if (phys_segments > max_phys_segs)
1618 break;
1619
1620 list_add_tail(&next->queuelist, &mqrq->packed->list);
1621 cur = next;
1622 reqs++;
1623 } while (1);
1624
1625 if (put_back) {
1626 spin_lock_irq(q->queue_lock);
1627 blk_requeue_request(q, next);
1628 spin_unlock_irq(q->queue_lock);
1629 }
1630
1631 if (reqs > 0) {
1632 list_add(&req->queuelist, &mqrq->packed->list);
1633 mqrq->packed->nr_entries = ++reqs;
1634 mqrq->packed->retries = reqs;
1635 return reqs;
1636 }
1637
1638no_packed:
1639 mqrq->cmd_type = MMC_PACKED_NONE;
1640 return 0;
1641}
1642
1643static void mmc_blk_packed_hdr_wrq_prep(struct mmc_queue_req *mqrq,
1644 struct mmc_card *card,
1645 struct mmc_queue *mq)
1646{
1647 struct mmc_blk_request *brq = &mqrq->brq;
1648 struct request *req = mqrq->req;
1649 struct request *prq;
1650 struct mmc_blk_data *md = mq->data;
1651 struct mmc_packed *packed = mqrq->packed;
1652 bool do_rel_wr, do_data_tag;
1653 u32 *packed_cmd_hdr;
1654 u8 hdr_blocks;
1655 u8 i = 1;
1656
1657 BUG_ON(!packed);
1658
1659 mqrq->cmd_type = MMC_PACKED_WRITE;
1660 packed->blocks = 0;
1661 packed->idx_failure = MMC_PACKED_NR_IDX;
1662
1663 packed_cmd_hdr = packed->cmd_hdr;
1664 memset(packed_cmd_hdr, 0, sizeof(packed->cmd_hdr));
1665 packed_cmd_hdr[0] = (packed->nr_entries << 16) |
1666 (PACKED_CMD_WR << 8) | PACKED_CMD_VER;
1667 hdr_blocks = mmc_large_sector(card) ? 8 : 1;
1668
1669 /*
1670 * Argument for each entry of packed group
1671 */
1672 list_for_each_entry(prq, &packed->list, queuelist) {
1673 do_rel_wr = mmc_req_rel_wr(prq) && (md->flags & MMC_BLK_REL_WR);
1674 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1675 (prq->cmd_flags & REQ_META) &&
1676 (rq_data_dir(prq) == WRITE) &&
1677 ((brq->data.blocks * brq->data.blksz) >=
1678 card->ext_csd.data_tag_unit_size);
1679 /* Argument of CMD23 */
1680 packed_cmd_hdr[(i * 2)] =
1681 (do_rel_wr ? MMC_CMD23_ARG_REL_WR : 0) |
1682 (do_data_tag ? MMC_CMD23_ARG_TAG_REQ : 0) |
1683 blk_rq_sectors(prq);
1684 /* Argument of CMD18 or CMD25 */
1685 packed_cmd_hdr[((i * 2)) + 1] =
1686 mmc_card_blockaddr(card) ?
1687 blk_rq_pos(prq) : blk_rq_pos(prq) << 9;
1688 packed->blocks += blk_rq_sectors(prq);
1689 i++;
1690 }
1691
1692 memset(brq, 0, sizeof(struct mmc_blk_request));
1693 brq->mrq.cmd = &brq->cmd;
1694 brq->mrq.data = &brq->data;
1695 brq->mrq.sbc = &brq->sbc;
1696 brq->mrq.stop = &brq->stop;
1697
1698 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1699 brq->sbc.arg = MMC_CMD23_ARG_PACKED | (packed->blocks + hdr_blocks);
1700 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1701
1702 brq->cmd.opcode = MMC_WRITE_MULTIPLE_BLOCK;
1703 brq->cmd.arg = blk_rq_pos(req);
1704 if (!mmc_card_blockaddr(card))
1705 brq->cmd.arg <<= 9;
1706 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1707
1708 brq->data.blksz = 512;
1709 brq->data.blocks = packed->blocks + hdr_blocks;
1710 brq->data.flags |= MMC_DATA_WRITE;
1711
1712 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1713 brq->stop.arg = 0;
1714 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
1715
1716 mmc_set_data_timeout(&brq->data, card);
1717
1718 brq->data.sg = mqrq->sg;
1719 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1720
1721 mqrq->mmc_active.mrq = &brq->mrq;
1722 mqrq->mmc_active.err_check = mmc_blk_packed_err_check;
1723
1724 mmc_queue_bounce_pre(mqrq);
1725}
1726
67716327
AH		 1727static int mmc_blk_cmd_err(struct mmc_blk_data *md, struct mmc_card *card,
1728 struct mmc_blk_request *brq, struct request *req,
1729 int ret)
1730{
ce39f9d1
SJ		 1731 struct mmc_queue_req *mq_rq;
1732 mq_rq = container_of(brq, struct mmc_queue_req, brq);
1733
67716327
AH		 1734 /*
1735 * If this is an SD card and we're writing, we can first
1736 * mark the known good sectors as ok.
1737 *
1738 * If the card is not SD, we can still ok written sectors
1739 * as reported by the controller (which might be less than
1740 * the real number of written sectors, but never more).
1741 */
1742 if (mmc_card_sd(card)) {
1743 u32 blocks;
1744
1745 blocks = mmc_sd_num_wr_blocks(card);
1746 if (blocks != (u32)-1) {
ecf8b5d0 1747 ret = blk_end_request(req, 0, blocks << 9);
67716327
AH		 1748 }
1749 } else {
ce39f9d1
SJ		 1750 if (!mmc_packed_cmd(mq_rq->cmd_type))
1751 ret = blk_end_request(req, 0, brq->data.bytes_xfered);
67716327
AH		 1752 }
1753 return ret;
1754}
1755
ce39f9d1
SJ		 1756static int mmc_blk_end_packed_req(struct mmc_queue_req *mq_rq)
1757{
1758 struct request *prq;
1759 struct mmc_packed *packed = mq_rq->packed;
1760 int idx = packed->idx_failure, i = 0;
1761 int ret = 0;
1762
1763 BUG_ON(!packed);
1764
1765 while (!list_empty(&packed->list)) {
1766 prq = list_entry_rq(packed->list.next);
1767 if (idx == i) {
1768 /* retry from error index */
1769 packed->nr_entries -= idx;
1770 mq_rq->req = prq;
1771 ret = 1;
1772
1773 if (packed->nr_entries == MMC_PACKED_NR_SINGLE) {
1774 list_del_init(&prq->queuelist);
1775 mmc_blk_clear_packed(mq_rq);
1776 }
1777 return ret;
1778 }
1779 list_del_init(&prq->queuelist);
1780 blk_end_request(prq, 0, blk_rq_bytes(prq));
1781 i++;
1782 }
1783
1784 mmc_blk_clear_packed(mq_rq);
1785 return ret;
1786}
1787
1788static void mmc_blk_abort_packed_req(struct mmc_queue_req *mq_rq)
1789{
1790 struct request *prq;
1791 struct mmc_packed *packed = mq_rq->packed;
1792
1793 BUG_ON(!packed);
1794
1795 while (!list_empty(&packed->list)) {
1796 prq = list_entry_rq(packed->list.next);
1797 list_del_init(&prq->queuelist);
1798 blk_end_request(prq, -EIO, blk_rq_bytes(prq));
1799 }
1800
1801 mmc_blk_clear_packed(mq_rq);
1802}
1803
1804static void mmc_blk_revert_packed_req(struct mmc_queue *mq,
1805 struct mmc_queue_req *mq_rq)
1806{
1807 struct request *prq;
1808 struct request_queue *q = mq->queue;
1809 struct mmc_packed *packed = mq_rq->packed;
1810
1811 BUG_ON(!packed);
1812
1813 while (!list_empty(&packed->list)) {
1814 prq = list_entry_rq(packed->list.prev);
1815 if (prq->queuelist.prev != &packed->list) {
1816 list_del_init(&prq->queuelist);
1817 spin_lock_irq(q->queue_lock);
1818 blk_requeue_request(mq->queue, prq);
1819 spin_unlock_irq(q->queue_lock);
1820 } else {
1821 list_del_init(&prq->queuelist);
1822 }
1823 }
1824
1825 mmc_blk_clear_packed(mq_rq);
1826}
1827
ee8a43a5 1828static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc)
54d49d77
PF		 1829{
1830 struct mmc_blk_data *md = mq->data;
1831 struct mmc_card *card = md->queue.card;
1832 struct mmc_blk_request *brq = &mq->mqrq_cur->brq;
67716327 1833 int ret = 1, disable_multi = 0, retry = 0, type;
d78d4a8a 1834 enum mmc_blk_status status;
ee8a43a5 1835 struct mmc_queue_req *mq_rq;
a5075eb9 1836 struct request *req = rqc;
ee8a43a5 1837 struct mmc_async_req *areq;
ce39f9d1
SJ		 1838 const u8 packed_nr = 2;
1839 u8 reqs = 0;
1da177e4 1840
ee8a43a5
PF		 1841 if (!rqc && !mq->mqrq_prev->req)
1842 return 0;
98ccf149 1843
ce39f9d1
SJ		 1844 if (rqc)
1845 reqs = mmc_blk_prep_packed_list(mq, rqc);
1846
ee8a43a5
PF		 1847 do {
1848 if (rqc) {
a5075eb9
SD		 1849 /*
1850 * When 4KB native sector is enabled, only 8 blocks
1851 * multiple read or write is allowed
1852 */
1853 if ((brq->data.blocks & 0x07) &&
1854 (card->ext_csd.data_sector_size == 4096)) {
1855 pr_err("%s: Transfer size is not 4KB sector size aligned\n",
1856 req->rq_disk->disk_name);
ce39f9d1 1857 mq_rq = mq->mqrq_cur;
a5075eb9
SD		 1858 goto cmd_abort;
1859 }
ce39f9d1
SJ		 1860
1861 if (reqs >= packed_nr)
1862 mmc_blk_packed_hdr_wrq_prep(mq->mqrq_cur,
1863 card, mq);
1864 else
1865 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
ee8a43a5
PF		 1866 areq = &mq->mqrq_cur->mmc_active;
1867 } else
1868 areq = NULL;
1869 areq = mmc_start_req(card->host, areq, (int *) &status);
2220eedf
KD		 1870 if (!areq) {
1871 if (status == MMC_BLK_NEW_REQUEST)
1872 mq->flags |= MMC_QUEUE_NEW_REQUEST;
ee8a43a5 1873 return 0;
2220eedf 1874 }
ee8a43a5
PF		 1875
1876 mq_rq = container_of(areq, struct mmc_queue_req, mmc_active);
1877 brq = &mq_rq->brq;
1878 req = mq_rq->req;
67716327 1879 type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
ee8a43a5 1880 mmc_queue_bounce_post(mq_rq);
98ccf149 1881
d78d4a8a
PF		 1882 switch (status) {
1883 case MMC_BLK_SUCCESS:
1884 case MMC_BLK_PARTIAL:
1885 /*
1886 * A block was successfully transferred.
1887 */
67716327 1888 mmc_blk_reset_success(md, type);
ce39f9d1
SJ		 1889
1890 if (mmc_packed_cmd(mq_rq->cmd_type)) {
1891 ret = mmc_blk_end_packed_req(mq_rq);
1892 break;
1893 } else {
1894 ret = blk_end_request(req, 0,
d78d4a8a 1895 brq->data.bytes_xfered);
ce39f9d1
SJ		 1896 }
1897
67716327
AH		 1898 /*
1899 * If the blk_end_request function returns non-zero even
1900 * though all data has been transferred and no errors
1901 * were returned by the host controller, it's a bug.
1902 */
ee8a43a5 1903 if (status == MMC_BLK_SUCCESS && ret) {
a3c76eb9 1904 pr_err("%s BUG rq_tot %d d_xfer %d\n",
ee8a43a5
PF		 1905 __func__, blk_rq_bytes(req),
1906 brq->data.bytes_xfered);
1907 rqc = NULL;
1908 goto cmd_abort;
1909 }
d78d4a8a
PF		 1910 break;
1911 case MMC_BLK_CMD_ERR:
67716327
AH		 1912 ret = mmc_blk_cmd_err(md, card, brq, req, ret);
1913 if (!mmc_blk_reset(md, card->host, type))
1914 break;
1915 goto cmd_abort;
d78d4a8a
PF		 1916 case MMC_BLK_RETRY:
1917 if (retry++ < 5)
a01f3ccf 1918 break;
67716327 1919 /* Fall through */
d78d4a8a 1920 case MMC_BLK_ABORT:
67716327
AH		 1921 if (!mmc_blk_reset(md, card->host, type))
1922 break;
4c2b8f26 1923 goto cmd_abort;
67716327
AH		 1924 case MMC_BLK_DATA_ERR: {
1925 int err;
1926
1927 err = mmc_blk_reset(md, card->host, type);
1928 if (!err)
1929 break;
ce39f9d1
SJ		 1930 if (err == -ENODEV ||
1931 mmc_packed_cmd(mq_rq->cmd_type))
67716327
AH		 1932 goto cmd_abort;
1933 /* Fall through */
1934 }
1935 case MMC_BLK_ECC_ERR:
1936 if (brq->data.blocks > 1) {
1937 /* Redo read one sector at a time */
6606110d
JP		 1938 pr_warn("%s: retrying using single block read\n",
1939 req->rq_disk->disk_name);
67716327
AH		 1940 disable_multi = 1;
1941 break;
1942 }
d78d4a8a
PF		 1943 /*
1944 * After an error, we redo I/O one sector at a
1945 * time, so we only reach here after trying to
1946 * read a single sector.
1947 */
ecf8b5d0 1948 ret = blk_end_request(req, -EIO,
d78d4a8a 1949 brq->data.blksz);
ee8a43a5
PF		 1950 if (!ret)
1951 goto start_new_req;
d78d4a8a 1952 break;
a8ad82cc
SRT		 1953 case MMC_BLK_NOMEDIUM:
1954 goto cmd_abort;
2220eedf
KD		 1955 default:
1956 pr_err("%s: Unhandled return value (%d)",
1957 req->rq_disk->disk_name, status);
1958 goto cmd_abort;
4c2b8f26
RKAL		 1959 }
1960
ee8a43a5 1961 if (ret) {
ce39f9d1
SJ		 1962 if (mmc_packed_cmd(mq_rq->cmd_type)) {
1963 if (!mq_rq->packed->retries)
1964 goto cmd_abort;
1965 mmc_blk_packed_hdr_wrq_prep(mq_rq, card, mq);
1966 mmc_start_req(card->host,
1967 &mq_rq->mmc_active, NULL);
1968 } else {
1969
1970 /*
1971 * In case of a incomplete request
1972 * prepare it again and resend.
1973 */
1974 mmc_blk_rw_rq_prep(mq_rq, card,
1975 disable_multi, mq);
1976 mmc_start_req(card->host,
1977 &mq_rq->mmc_active, NULL);
1978 }
ee8a43a5 1979 }
1da177e4
LT		 1980 } while (ret);
1981
1da177e4
LT		 1982 return 1;
1983
a01f3ccf 1984 cmd_abort:
ce39f9d1
SJ		 1985 if (mmc_packed_cmd(mq_rq->cmd_type)) {
1986 mmc_blk_abort_packed_req(mq_rq);
1987 } else {
1988 if (mmc_card_removed(card))
1989 req->cmd_flags |= REQ_QUIET;
1990 while (ret)
1991 ret = blk_end_request(req, -EIO,
1992 blk_rq_cur_bytes(req));
1993 }
1da177e4 1994
ee8a43a5
PF		 1995 start_new_req:
1996 if (rqc) {
7a81902f
SJ		 1997 if (mmc_card_removed(card)) {
1998 rqc->cmd_flags |= REQ_QUIET;
1999 blk_end_request_all(rqc, -EIO);
2000 } else {
ce39f9d1
SJ		 2001 /*
2002 * If current request is packed, it needs to put back.
2003 */
2004 if (mmc_packed_cmd(mq->mqrq_cur->cmd_type))
2005 mmc_blk_revert_packed_req(mq, mq->mqrq_cur);
2006
7a81902f
SJ		 2007 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
2008 mmc_start_req(card->host,
2009 &mq->mqrq_cur->mmc_active, NULL);
2010 }
ee8a43a5
PF		 2011 }
2012
1da177e4
LT		 2013 return 0;
2014}
2015
bd788c96
AH		 2016static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
2017{
1a258db6
AW		 2018 int ret;
2019 struct mmc_blk_data *md = mq->data;
2020 struct mmc_card *card = md->queue.card;
2220eedf
KD		 2021 struct mmc_host *host = card->host;
2022 unsigned long flags;
f662ae48 2023 unsigned int cmd_flags = req ? req->cmd_flags : 0;
1a258db6 2024
ee8a43a5
PF		 2025 if (req && !mq->mqrq_prev->req)
2026 /* claim host only for the first request */
e94cfef6 2027 mmc_get_card(card);
ee8a43a5 2028
371a689f
AW		 2029 ret = mmc_blk_part_switch(card, md);
2030 if (ret) {
0d7d85ca 2031 if (req) {
ecf8b5d0 2032 blk_end_request_all(req, -EIO);
0d7d85ca 2033 }
371a689f
AW		 2034 ret = 0;
2035 goto out;
2036 }
1a258db6 2037
2220eedf 2038 mq->flags &= ~MMC_QUEUE_NEW_REQUEST;
f662ae48 2039 if (cmd_flags & REQ_DISCARD) {
ee8a43a5
PF		 2040 /* complete ongoing async transfer before issuing discard */
2041 if (card->host->areq)
2042 mmc_blk_issue_rw_rq(mq, NULL);
5204d00f 2043 if (req->cmd_flags & REQ_SECURE)
1a258db6 2044 ret = mmc_blk_issue_secdiscard_rq(mq, req);
49804548 2045 else
1a258db6 2046 ret = mmc_blk_issue_discard_rq(mq, req);
f662ae48 2047 } else if (cmd_flags & REQ_FLUSH) {
393f9a08
JC		 2048 /* complete ongoing async transfer before issuing flush */
2049 if (card->host->areq)
2050 mmc_blk_issue_rw_rq(mq, NULL);
1a258db6 2051 ret = mmc_blk_issue_flush(mq, req);
49804548 2052 } else {
2220eedf
KD		 2053 if (!req && host->areq) {
2054 spin_lock_irqsave(&host->context_info.lock, flags);
2055 host->context_info.is_waiting_last_req = true;
2056 spin_unlock_irqrestore(&host->context_info.lock, flags);
2057 }
1a258db6 2058 ret = mmc_blk_issue_rw_rq(mq, req);
49804548 2059 }
1a258db6 2060
371a689f 2061out:
ef3a69c7 2062 if ((!req && !(mq->flags & MMC_QUEUE_NEW_REQUEST)) ||
f662ae48 2063 (cmd_flags & MMC_REQ_SPECIAL_MASK))
ef3a69c7
SJ		 2064 /*
2065 * Release host when there are no more requests
2066 * and after special request(discard, flush) is done.
2067 * In case sepecial request, there is no reentry to
2068 * the 'mmc_blk_issue_rq' with 'mqrq_prev->req'.
2069 */
e94cfef6 2070 mmc_put_card(card);
1a258db6 2071 return ret;
bd788c96 2072}
1da177e4 2073
a6f6c96b
RK		 2074static inline int mmc_blk_readonly(struct mmc_card *card)
2075{
2076 return mmc_card_readonly(card) ||
2077 !(card->csd.cmdclass & CCC_BLOCK_WRITE);
2078}
2079
371a689f
AW		 2080static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
2081 struct device *parent,
2082 sector_t size,
2083 bool default_ro,
add710ea
JR		 2084 const char *subname,
2085 int area_type)
1da177e4
LT		 2086{
2087 struct mmc_blk_data *md;
2088 int devidx, ret;
2089
5e71b7a6
OJ		 2090 devidx = find_first_zero_bit(dev_use, max_devices);
2091 if (devidx >= max_devices)
1da177e4
LT		 2092 return ERR_PTR(-ENOSPC);
2093 __set_bit(devidx, dev_use);
2094
dd00cc48 2095 md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL);
a6f6c96b
RK		 2096 if (!md) {
2097 ret = -ENOMEM;
2098 goto out;
2099 }
1da177e4 2100
f06c9153
AW		 2101 /*
2102 * !subname implies we are creating main mmc_blk_data that will be
fc95e30b 2103 * associated with mmc_card with dev_set_drvdata. Due to device
f06c9153
AW		 2104 * partitions, devidx will not coincide with a per-physical card
2105 * index anymore so we keep track of a name index.
2106 */
2107 if (!subname) {
2108 md->name_idx = find_first_zero_bit(name_use, max_devices);
2109 __set_bit(md->name_idx, name_use);
add710ea 2110 } else
f06c9153
AW		 2111 md->name_idx = ((struct mmc_blk_data *)
2112 dev_to_disk(parent)->private_data)->name_idx;
2113
add710ea
JR		 2114 md->area_type = area_type;
2115
a6f6c96b
RK		 2116 /*
2117 * Set the read-only status based on the supported commands
2118 * and the write protect switch.
2119 */
2120 md->read_only = mmc_blk_readonly(card);
1da177e4 2121
5e71b7a6 2122 md->disk = alloc_disk(perdev_minors);
a6f6c96b
RK		 2123 if (md->disk == NULL) {
2124 ret = -ENOMEM;
2125 goto err_kfree;
2126 }
1da177e4 2127
a6f6c96b 2128 spin_lock_init(&md->lock);
371a689f 2129 INIT_LIST_HEAD(&md->part);
a6f6c96b 2130 md->usage = 1;
1da177e4 2131
d09408ad 2132 ret = mmc_init_queue(&md->queue, card, &md->lock, subname);
a6f6c96b
RK		 2133 if (ret)
2134 goto err_putdisk;
1da177e4 2135
a6f6c96b
RK		 2136 md->queue.issue_fn = mmc_blk_issue_rq;
2137 md->queue.data = md;
d2b18394 2138
fe6b4c88 2139 md->disk->major = MMC_BLOCK_MAJOR;
5e71b7a6 2140 md->disk->first_minor = devidx * perdev_minors;
a6f6c96b
RK		 2141 md->disk->fops = &mmc_bdops;
2142 md->disk->private_data = md;
2143 md->disk->queue = md->queue.queue;
371a689f
AW		 2144 md->disk->driverfs_dev = parent;
2145 set_disk_ro(md->disk, md->read_only || default_ro);
f5b4d71f 2146 if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT))
53d8f974 2147 md->disk->flags |= GENHD_FL_NO_PART_SCAN;
a6f6c96b
RK		 2148
2149 /*
2150 * As discussed on lkml, GENHD_FL_REMOVABLE should:
2151 *
2152 * - be set for removable media with permanent block devices
2153 * - be unset for removable block devices with permanent media
2154 *
2155 * Since MMC block devices clearly fall under the second
2156 * case, we do not set GENHD_FL_REMOVABLE. Userspace
2157 * should use the block device creation/destruction hotplug
2158 * messages to tell when the card is present.
2159 */
2160
f06c9153 2161 snprintf(md->disk->disk_name, sizeof(md->disk->disk_name),
fe821915 2162 "mmcblk%u%s", md->name_idx, subname ? subname : "");
a6f6c96b 2163
a5075eb9
SD		 2164 if (mmc_card_mmc(card))
2165 blk_queue_logical_block_size(md->queue.queue,
2166 card->ext_csd.data_sector_size);
2167 else
2168 blk_queue_logical_block_size(md->queue.queue, 512);
2169
371a689f 2170 set_capacity(md->disk, size);
d0c97cfb 2171
f0d89972
AW		 2172 if (mmc_host_cmd23(card->host)) {
2173 if (mmc_card_mmc(card) ||
2174 (mmc_card_sd(card) &&
2175 card->scr.cmds & SD_SCR_CMD23_SUPPORT))
2176 md->flags |= MMC_BLK_CMD23;
2177 }
d0c97cfb
AW		 2178
2179 if (mmc_card_mmc(card) &&
2180 md->flags & MMC_BLK_CMD23 &&
2181 ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) ||
2182 card->ext_csd.rel_sectors)) {
2183 md->flags |= MMC_BLK_REL_WR;
2184 blk_queue_flush(md->queue.queue, REQ_FLUSH | REQ_FUA);
2185 }
2186
ce39f9d1
SJ		 2187 if (mmc_card_mmc(card) &&
2188 (area_type == MMC_BLK_DATA_AREA_MAIN) &&
2189 (md->flags & MMC_BLK_CMD23) &&
2190 card->ext_csd.packed_event_en) {
2191 if (!mmc_packed_init(&md->queue, card))
2192 md->flags |= MMC_BLK_PACKED_CMD;
2193 }
2194
371a689f
AW		 2195 return md;
2196
2197 err_putdisk:
2198 put_disk(md->disk);
2199 err_kfree:
2200 kfree(md);
2201 out:
2202 return ERR_PTR(ret);
2203}
2204
2205static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
2206{
2207 sector_t size;
a6f6c96b 2208
85a18ad9
PO		 2209 if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) {
2210 /*
2211 * The EXT_CSD sector count is in number or 512 byte
2212 * sectors.
2213 */
371a689f 2214 size = card->ext_csd.sectors;
85a18ad9
PO		 2215 } else {
2216 /*
2217 * The CSD capacity field is in units of read_blkbits.
2218 * set_capacity takes units of 512 bytes.
2219 */
371a689f 2220 size = card->csd.capacity << (card->csd.read_blkbits - 9);
85a18ad9 2221 }
371a689f 2222
7a30f2af 2223 return mmc_blk_alloc_req(card, &card->dev, size, false, NULL,
add710ea 2224 MMC_BLK_DATA_AREA_MAIN);
371a689f 2225}
a6f6c96b 2226
371a689f
AW		 2227static int mmc_blk_alloc_part(struct mmc_card *card,
2228 struct mmc_blk_data *md,
2229 unsigned int part_type,
2230 sector_t size,
2231 bool default_ro,
add710ea
JR		 2232 const char *subname,
2233 int area_type)
371a689f
AW		 2234{
2235 char cap_str[10];
2236 struct mmc_blk_data *part_md;
2237
2238 part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro,
add710ea 2239 subname, area_type);
371a689f
AW		 2240 if (IS_ERR(part_md))
2241 return PTR_ERR(part_md);
2242 part_md->part_type = part_type;
2243 list_add(&part_md->part, &md->part);
2244
b9f28d86 2245 string_get_size((u64)get_capacity(part_md->disk), 512, STRING_UNITS_2,
371a689f 2246 cap_str, sizeof(cap_str));
a3c76eb9 2247 pr_info("%s: %s %s partition %u %s\n",
371a689f
AW		 2248 part_md->disk->disk_name, mmc_card_id(card),
2249 mmc_card_name(card), part_md->part_type, cap_str);
2250 return 0;
2251}
2252
e0c368d5
NJ		 2253/* MMC Physical partitions consist of two boot partitions and
2254 * up to four general purpose partitions.
2255 * For each partition enabled in EXT_CSD a block device will be allocatedi
2256 * to provide access to the partition.
2257 */
2258
371a689f
AW		 2259static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md)
2260{
e0c368d5 2261 int idx, ret = 0;
371a689f
AW		 2262
2263 if (!mmc_card_mmc(card))
2264 return 0;
2265
e0c368d5
NJ		 2266 for (idx = 0; idx < card->nr_parts; idx++) {
2267 if (card->part[idx].size) {
2268 ret = mmc_blk_alloc_part(card, md,
2269 card->part[idx].part_cfg,
2270 card->part[idx].size >> 9,
2271 card->part[idx].force_ro,
add710ea
JR		 2272 card->part[idx].name,
2273 card->part[idx].area_type);
e0c368d5
NJ		 2274 if (ret)
2275 return ret;
2276 }
371a689f
AW		 2277 }
2278
2279 return ret;
1da177e4
LT		 2280}
2281
371a689f
AW		 2282static void mmc_blk_remove_req(struct mmc_blk_data *md)
2283{
add710ea
JR		 2284 struct mmc_card *card;
2285
371a689f 2286 if (md) {
fdfa20c1
PT		 2287 /*
2288 * Flush remaining requests and free queues. It
2289 * is freeing the queue that stops new requests
2290 * from being accepted.
2291 */
8efb83a2 2292 card = md->queue.card;
fdfa20c1
PT		 2293 mmc_cleanup_queue(&md->queue);
2294 if (md->flags & MMC_BLK_PACKED_CMD)
2295 mmc_packed_clean(&md->queue);
371a689f
AW		 2296 if (md->disk->flags & GENHD_FL_UP) {
2297 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
add710ea
JR		 2298 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2299 card->ext_csd.boot_ro_lockable)
2300 device_remove_file(disk_to_dev(md->disk),
2301 &md->power_ro_lock);
371a689f 2302
371a689f
AW		 2303 del_gendisk(md->disk);
2304 }
371a689f
AW		 2305 mmc_blk_put(md);
2306 }
2307}
2308
2309static void mmc_blk_remove_parts(struct mmc_card *card,
2310 struct mmc_blk_data *md)
2311{
2312 struct list_head *pos, *q;
2313 struct mmc_blk_data *part_md;
2314
f06c9153 2315 __clear_bit(md->name_idx, name_use);
371a689f
AW		 2316 list_for_each_safe(pos, q, &md->part) {
2317 part_md = list_entry(pos, struct mmc_blk_data, part);
2318 list_del(pos);
2319 mmc_blk_remove_req(part_md);
2320 }
2321}
2322
2323static int mmc_add_disk(struct mmc_blk_data *md)
2324{
2325 int ret;
add710ea 2326 struct mmc_card *card = md->queue.card;
371a689f
AW		 2327
2328 add_disk(md->disk);
2329 md->force_ro.show = force_ro_show;
2330 md->force_ro.store = force_ro_store;
641c3187 2331 sysfs_attr_init(&md->force_ro.attr);
371a689f
AW		 2332 md->force_ro.attr.name = "force_ro";
2333 md->force_ro.attr.mode = S_IRUGO | S_IWUSR;
2334 ret = device_create_file(disk_to_dev(md->disk), &md->force_ro);
2335 if (ret)
add710ea
JR		 2336 goto force_ro_fail;
2337
2338 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2339 card->ext_csd.boot_ro_lockable) {
88187398 2340 umode_t mode;
add710ea
JR		 2341
2342 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS)
2343 mode = S_IRUGO;
2344 else
2345 mode = S_IRUGO | S_IWUSR;
2346
2347 md->power_ro_lock.show = power_ro_lock_show;
2348 md->power_ro_lock.store = power_ro_lock_store;
00d9ac08 2349 sysfs_attr_init(&md->power_ro_lock.attr);
add710ea
JR		 2350 md->power_ro_lock.attr.mode = mode;
2351 md->power_ro_lock.attr.name =
2352 "ro_lock_until_next_power_on";
2353 ret = device_create_file(disk_to_dev(md->disk),
2354 &md->power_ro_lock);
2355 if (ret)
2356 goto power_ro_lock_fail;
2357 }
2358 return ret;
2359
2360power_ro_lock_fail:
2361 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2362force_ro_fail:
2363 del_gendisk(md->disk);
371a689f
AW		 2364
2365 return ret;
2366}
2367
c59d4473
CB		 2368#define CID_MANFID_SANDISK 0x2
2369#define CID_MANFID_TOSHIBA 0x11
2370#define CID_MANFID_MICRON 0x13
3550ccdb 2371#define CID_MANFID_SAMSUNG 0x15
c59d4473 2372
6f60c222
AW		 2373static const struct mmc_fixup blk_fixups[] =
2374{
c59d4473
CB		 2375 MMC_FIXUP("SEM02G", CID_MANFID_SANDISK, 0x100, add_quirk,
2376 MMC_QUIRK_INAND_CMD38),
2377 MMC_FIXUP("SEM04G", CID_MANFID_SANDISK, 0x100, add_quirk,
2378 MMC_QUIRK_INAND_CMD38),
2379 MMC_FIXUP("SEM08G", CID_MANFID_SANDISK, 0x100, add_quirk,
2380 MMC_QUIRK_INAND_CMD38),
2381 MMC_FIXUP("SEM16G", CID_MANFID_SANDISK, 0x100, add_quirk,
2382 MMC_QUIRK_INAND_CMD38),
2383 MMC_FIXUP("SEM32G", CID_MANFID_SANDISK, 0x100, add_quirk,
2384 MMC_QUIRK_INAND_CMD38),
d0c97cfb
AW		 2385
2386 /*
2387 * Some MMC cards experience performance degradation with CMD23
2388 * instead of CMD12-bounded multiblock transfers. For now we'll
2389 * black list what's bad...
2390 * - Certain Toshiba cards.
2391 *
2392 * N.B. This doesn't affect SD cards.
2393 */
c59d4473 2394 MMC_FIXUP("MMC08G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
d0c97cfb 2395 MMC_QUIRK_BLK_NO_CMD23),
c59d4473 2396 MMC_FIXUP("MMC16G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
d0c97cfb 2397 MMC_QUIRK_BLK_NO_CMD23),
c59d4473 2398 MMC_FIXUP("MMC32G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
d0c97cfb 2399 MMC_QUIRK_BLK_NO_CMD23),
6de5fc9c
SNX		 2400
2401 /*
2402 * Some Micron MMC cards needs longer data read timeout than
2403 * indicated in CSD.
2404 */
c59d4473 2405 MMC_FIXUP(CID_NAME_ANY, CID_MANFID_MICRON, 0x200, add_quirk_mmc,
6de5fc9c
SNX		 2406 MMC_QUIRK_LONG_READ_TIME),
2407
3550ccdb
IC		 2408 /*
2409 * On these Samsung MoviNAND parts, performing secure erase or
2410 * secure trim can result in unrecoverable corruption due to a
2411 * firmware bug.
2412 */
2413 MMC_FIXUP("M8G2FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2414 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2415 MMC_FIXUP("MAG4FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2416 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2417 MMC_FIXUP("MBG8FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2418 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2419 MMC_FIXUP("MCGAFA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2420 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2421 MMC_FIXUP("VAL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2422 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2423 MMC_FIXUP("VYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2424 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2425 MMC_FIXUP("KYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2426 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2427 MMC_FIXUP("VZL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2428 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2429
6f60c222
AW		 2430 END_FIXUP
2431};
2432
96541bac 2433static int mmc_blk_probe(struct mmc_card *card)
1da177e4 2434{
371a689f 2435 struct mmc_blk_data *md, *part_md;
a7bbb573
PO		 2436 char cap_str[10];
2437
912490db
PO		 2438 /*
2439 * Check that the card supports the command class(es) we need.
2440 */
2441 if (!(card->csd.cmdclass & CCC_BLOCK_READ))
1da177e4
LT		 2442 return -ENODEV;
2443
5204d00f
LC		 2444 mmc_fixup_device(card, blk_fixups);
2445
1da177e4
LT		 2446 md = mmc_blk_alloc(card);
2447 if (IS_ERR(md))
2448 return PTR_ERR(md);
2449
b9f28d86 2450 string_get_size((u64)get_capacity(md->disk), 512, STRING_UNITS_2,
a7bbb573 2451 cap_str, sizeof(cap_str));
a3c76eb9 2452 pr_info("%s: %s %s %s %s\n",
1da177e4 2453 md->disk->disk_name, mmc_card_id(card), mmc_card_name(card),
a7bbb573 2454 cap_str, md->read_only ? "(ro)" : "");
1da177e4 2455
371a689f
AW		 2456 if (mmc_blk_alloc_parts(card, md))
2457 goto out;
2458
96541bac 2459 dev_set_drvdata(&card->dev, md);
6f60c222 2460
371a689f
AW		 2461 if (mmc_add_disk(md))
2462 goto out;
2463
2464 list_for_each_entry(part_md, &md->part, part) {
2465 if (mmc_add_disk(part_md))
2466 goto out;
2467 }
e94cfef6
UH		 2468
2469 pm_runtime_set_autosuspend_delay(&card->dev, 3000);
2470 pm_runtime_use_autosuspend(&card->dev);
2471
2472 /*
2473 * Don't enable runtime PM for SD-combo cards here. Leave that
2474 * decision to be taken during the SDIO init sequence instead.
2475 */
2476 if (card->type != MMC_TYPE_SD_COMBO) {
2477 pm_runtime_set_active(&card->dev);
2478 pm_runtime_enable(&card->dev);
2479 }
2480
1da177e4
LT		 2481 return 0;
2482
2483 out:
371a689f
AW		 2484 mmc_blk_remove_parts(card, md);
2485 mmc_blk_remove_req(md);
5865f287 2486 return 0;
1da177e4
LT		 2487}
2488
96541bac 2489static void mmc_blk_remove(struct mmc_card *card)
1da177e4 2490{
96541bac 2491 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
1da177e4 2492
371a689f 2493 mmc_blk_remove_parts(card, md);
e94cfef6 2494 pm_runtime_get_sync(&card->dev);
ddd6fa7e
AH		 2495 mmc_claim_host(card->host);
2496 mmc_blk_part_switch(card, md);
2497 mmc_release_host(card->host);
e94cfef6
UH		 2498 if (card->type != MMC_TYPE_SD_COMBO)
2499 pm_runtime_disable(&card->dev);
2500 pm_runtime_put_noidle(&card->dev);
371a689f 2501 mmc_blk_remove_req(md);
96541bac 2502 dev_set_drvdata(&card->dev, NULL);
1da177e4
LT		 2503}
2504
96541bac 2505static int _mmc_blk_suspend(struct mmc_card *card)
1da177e4 2506{
371a689f 2507 struct mmc_blk_data *part_md;
96541bac 2508 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
1da177e4
LT		 2509
2510 if (md) {
2511 mmc_queue_suspend(&md->queue);
371a689f
AW		 2512 list_for_each_entry(part_md, &md->part, part) {
2513 mmc_queue_suspend(&part_md->queue);
2514 }
1da177e4
LT		 2515 }
2516 return 0;
2517}
2518
96541bac 2519static void mmc_blk_shutdown(struct mmc_card *card)
76287748 2520{
96541bac 2521 _mmc_blk_suspend(card);
76287748
UH		 2522}
2523
0967edc6
UH		 2524#ifdef CONFIG_PM_SLEEP
2525static int mmc_blk_suspend(struct device *dev)
76287748 2526{
96541bac
UH		 2527 struct mmc_card *card = mmc_dev_to_card(dev);
2528
2529 return _mmc_blk_suspend(card);
76287748
UH		 2530}
2531
0967edc6 2532static int mmc_blk_resume(struct device *dev)
1da177e4 2533{
371a689f 2534 struct mmc_blk_data *part_md;
fc95e30b 2535 struct mmc_blk_data *md = dev_get_drvdata(dev);
1da177e4
LT		 2536
2537 if (md) {
371a689f
AW		 2538 /*
2539 * Resume involves the card going into idle state,
2540 * so current partition is always the main one.
2541 */
2542 md->part_curr = md->part_type;
1da177e4 2543 mmc_queue_resume(&md->queue);
371a689f
AW		 2544 list_for_each_entry(part_md, &md->part, part) {
2545 mmc_queue_resume(&part_md->queue);
2546 }
1da177e4
LT		 2547 }
2548 return 0;
2549}
1da177e4
LT		 2550#endif
2551
0967edc6
UH		 2552static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops, mmc_blk_suspend, mmc_blk_resume);
2553
96541bac
UH		 2554static struct mmc_driver mmc_driver = {
2555 .drv = {
2556 .name = "mmcblk",
2557 .pm = &mmc_blk_pm_ops,
2558 },
1da177e4
LT		 2559 .probe = mmc_blk_probe,
2560 .remove = mmc_blk_remove,
76287748 2561 .shutdown = mmc_blk_shutdown,
1da177e4
LT		 2562};
2563
2564static int __init mmc_blk_init(void)
2565{
9d4e98e9 2566 int res;
1da177e4 2567
5e71b7a6
OJ		 2568 if (perdev_minors != CONFIG_MMC_BLOCK_MINORS)
2569 pr_info("mmcblk: using %d minors per device\n", perdev_minors);
2570
a26eba61 2571 max_devices = min(MAX_DEVICES, (1 << MINORBITS) / perdev_minors);
5e71b7a6 2572
fe6b4c88
PO		 2573 res = register_blkdev(MMC_BLOCK_MAJOR, "mmc");
2574 if (res)
1da177e4 2575 goto out;
1da177e4 2576
9d4e98e9
AM		 2577 res = mmc_register_driver(&mmc_driver);
2578 if (res)
2579 goto out2;
1da177e4 2580
9d4e98e9
AM		 2581 return 0;
2582 out2:
2583 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
1da177e4
LT		 2584 out:
2585 return res;
2586}
2587
2588static void __exit mmc_blk_exit(void)
2589{
2590 mmc_unregister_driver(&mmc_driver);
fe6b4c88 2591 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
1da177e4
LT		 2592}
2593
2594module_init(mmc_blk_init);
2595module_exit(mmc_blk_exit);
2596
2597MODULE_LICENSE("GPL");
2598MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver");
2599
Linux 6.x block layer and io_uring tree(s)