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mmc: MMC_MTK should depend on HAS_DMA
[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
6f398ad2
AH		 916 /* Re-tune if needed */
917 mmc_retune_recheck(card->host);
918
a01f3ccf
RKAL		 919 prev_cmd_status_valid = false;
920 pr_err("%s: error %d sending status command, %sing\n",
921 req->rq_disk->disk_name, err, retry ? "retry" : "abort");
922 }
923
924 /* We couldn't get a response from the card. Give up. */
a8ad82cc
SRT		 925 if (err) {
926 /* Check if the card is removed */
927 if (mmc_detect_card_removed(card->host))
928 return ERR_NOMEDIUM;
a01f3ccf 929 return ERR_ABORT;
a8ad82cc 930 }
a01f3ccf 931
67716327
AH		 932 /* Flag ECC errors */
933 if ((status & R1_CARD_ECC_FAILED) ||
934 (brq->stop.resp[0] & R1_CARD_ECC_FAILED) ||
935 (brq->cmd.resp[0] & R1_CARD_ECC_FAILED))
936 *ecc_err = 1;
937
c8760069
KY		 938 /* Flag General errors */
939 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ)
940 if ((status & R1_ERROR) ||
941 (brq->stop.resp[0] & R1_ERROR)) {
942 pr_err("%s: %s: general error sending stop or status command, stop cmd response %#x, card status %#x\n",
943 req->rq_disk->disk_name, __func__,
944 brq->stop.resp[0], status);
945 *gen_err = 1;
946 }
947
a01f3ccf
RKAL		 948 /*
949 * Check the current card state. If it is in some data transfer
950 * mode, tell it to stop (and hopefully transition back to TRAN.)
951 */
952 if (R1_CURRENT_STATE(status) == R1_STATE_DATA ||
953 R1_CURRENT_STATE(status) == R1_STATE_RCV) {
bb5cba40
UH		 954 err = send_stop(card,
955 DIV_ROUND_UP(brq->data.timeout_ns, 1000000),
956 req, gen_err, &stop_status);
957 if (err) {
a01f3ccf
RKAL		 958 pr_err("%s: error %d sending stop command\n",
959 req->rq_disk->disk_name, err);
bb5cba40
UH		 960 /*
961 * If the stop cmd also timed out, the card is probably
962 * not present, so abort. Other errors are bad news too.
963 */
a01f3ccf 964 return ERR_ABORT;
bb5cba40
UH		 965 }
966
67716327
AH		 967 if (stop_status & R1_CARD_ECC_FAILED)
968 *ecc_err = 1;
a01f3ccf
RKAL		 969 }
970
971 /* Check for set block count errors */
972 if (brq->sbc.error)
973 return mmc_blk_cmd_error(req, "SET_BLOCK_COUNT", brq->sbc.error,
974 prev_cmd_status_valid, status);
975
976 /* Check for r/w command errors */
977 if (brq->cmd.error)
978 return mmc_blk_cmd_error(req, "r/w cmd", brq->cmd.error,
979 prev_cmd_status_valid, status);
980
67716327
AH		 981 /* Data errors */
982 if (!brq->stop.error)
983 return ERR_CONTINUE;
984
a01f3ccf 985 /* Now for stop errors. These aren't fatal to the transfer. */
5e1344eb 986 pr_info("%s: error %d sending stop command, original cmd response %#x, card status %#x\n",
a01f3ccf
RKAL		 987 req->rq_disk->disk_name, brq->stop.error,
988 brq->cmd.resp[0], status);
989
990 /*
991 * Subsitute in our own stop status as this will give the error
992 * state which happened during the execution of the r/w command.
993 */
994 if (stop_status) {
995 brq->stop.resp[0] = stop_status;
996 brq->stop.error = 0;
997 }
998 return ERR_CONTINUE;
999}
1000
67716327
AH		 1001static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host,
1002 int type)
1003{
1004 int err;
1005
1006 if (md->reset_done & type)
1007 return -EEXIST;
1008
1009 md->reset_done |= type;
1010 err = mmc_hw_reset(host);
1011 /* Ensure we switch back to the correct partition */
1012 if (err != -EOPNOTSUPP) {
fc95e30b
UH		 1013 struct mmc_blk_data *main_md =
1014 dev_get_drvdata(&host->card->dev);
67716327
AH		 1015 int part_err;
1016
1017 main_md->part_curr = main_md->part_type;
1018 part_err = mmc_blk_part_switch(host->card, md);
1019 if (part_err) {
1020 /*
1021 * We have failed to get back into the correct
1022 * partition, so we need to abort the whole request.
1023 */
1024 return -ENODEV;
1025 }
1026 }
1027 return err;
1028}
1029
1030static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type)
1031{
1032 md->reset_done &= ~type;
1033}
1034
4e93b9a6
CD		 1035int mmc_access_rpmb(struct mmc_queue *mq)
1036{
1037 struct mmc_blk_data *md = mq->data;
1038 /*
1039 * If this is a RPMB partition access, return ture
1040 */
1041 if (md && md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
1042 return true;
1043
1044 return false;
1045}
1046
bd788c96
AH		 1047static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
1048{
1049 struct mmc_blk_data *md = mq->data;
1050 struct mmc_card *card = md->queue.card;
1051 unsigned int from, nr, arg;
67716327 1052 int err = 0, type = MMC_BLK_DISCARD;
bd788c96 1053
bd788c96
AH		 1054 if (!mmc_can_erase(card)) {
1055 err = -EOPNOTSUPP;
1056 goto out;
1057 }
1058
1059 from = blk_rq_pos(req);
1060 nr = blk_rq_sectors(req);
1061
b3bf9153
KP		 1062 if (mmc_can_discard(card))
1063 arg = MMC_DISCARD_ARG;
1064 else if (mmc_can_trim(card))
bd788c96
AH		 1065 arg = MMC_TRIM_ARG;
1066 else
1067 arg = MMC_ERASE_ARG;
67716327 1068retry:
6a7a6b45
AW		 1069 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1070 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1071 INAND_CMD38_ARG_EXT_CSD,
1072 arg == MMC_TRIM_ARG ?
1073 INAND_CMD38_ARG_TRIM :
1074 INAND_CMD38_ARG_ERASE,
1075 0);
1076 if (err)
1077 goto out;
1078 }
bd788c96
AH		 1079 err = mmc_erase(card, from, nr, arg);
1080out:
67716327
AH		 1081 if (err == -EIO && !mmc_blk_reset(md, card->host, type))
1082 goto retry;
1083 if (!err)
1084 mmc_blk_reset_success(md, type);
ecf8b5d0 1085 blk_end_request(req, err, blk_rq_bytes(req));
bd788c96 1086
bd788c96
AH		 1087 return err ? 0 : 1;
1088}
1089
49804548
AH		 1090static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
1091 struct request *req)
1092{
1093 struct mmc_blk_data *md = mq->data;
1094 struct mmc_card *card = md->queue.card;
775a9362 1095 unsigned int from, nr, arg;
67716327 1096 int err = 0, type = MMC_BLK_SECDISCARD;
49804548 1097
775a9362 1098 if (!(mmc_can_secure_erase_trim(card))) {
49804548
AH		 1099 err = -EOPNOTSUPP;
1100 goto out;
1101 }
1102
28302812
AH		 1103 from = blk_rq_pos(req);
1104 nr = blk_rq_sectors(req);
1105
775a9362
ME		 1106 if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr))
1107 arg = MMC_SECURE_TRIM1_ARG;
1108 else
1109 arg = MMC_SECURE_ERASE_ARG;
d9ddd629 1110
67716327 1111retry:
6a7a6b45
AW		 1112 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1113 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1114 INAND_CMD38_ARG_EXT_CSD,
1115 arg == MMC_SECURE_TRIM1_ARG ?
1116 INAND_CMD38_ARG_SECTRIM1 :
1117 INAND_CMD38_ARG_SECERASE,
1118 0);
1119 if (err)
28302812 1120 goto out_retry;
6a7a6b45 1121 }
28302812 1122
49804548 1123 err = mmc_erase(card, from, nr, arg);
28302812
AH		 1124 if (err == -EIO)
1125 goto out_retry;
1126 if (err)
1127 goto out;
1128
1129 if (arg == MMC_SECURE_TRIM1_ARG) {
6a7a6b45
AW		 1130 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1131 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1132 INAND_CMD38_ARG_EXT_CSD,
1133 INAND_CMD38_ARG_SECTRIM2,
1134 0);
1135 if (err)
28302812 1136 goto out_retry;
6a7a6b45 1137 }
28302812 1138
49804548 1139 err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG);
28302812
AH		 1140 if (err == -EIO)
1141 goto out_retry;
1142 if (err)
1143 goto out;
6a7a6b45 1144 }
28302812 1145
28302812
AH		 1146out_retry:
1147 if (err && !mmc_blk_reset(md, card->host, type))
67716327
AH		 1148 goto retry;
1149 if (!err)
1150 mmc_blk_reset_success(md, type);
28302812 1151out:
ecf8b5d0 1152 blk_end_request(req, err, blk_rq_bytes(req));
49804548 1153
49804548
AH		 1154 return err ? 0 : 1;
1155}
1156
f4c5522b
AW		 1157static int mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req)
1158{
1159 struct mmc_blk_data *md = mq->data;
881d1c25
SJ		 1160 struct mmc_card *card = md->queue.card;
1161 int ret = 0;
1162
1163 ret = mmc_flush_cache(card);
1164 if (ret)
1165 ret = -EIO;
f4c5522b 1166
ecf8b5d0 1167 blk_end_request_all(req, ret);
f4c5522b 1168
881d1c25 1169 return ret ? 0 : 1;
f4c5522b
AW		 1170}
1171
1172/*
1173 * Reformat current write as a reliable write, supporting
1174 * both legacy and the enhanced reliable write MMC cards.
1175 * In each transfer we'll handle only as much as a single
1176 * reliable write can handle, thus finish the request in
1177 * partial completions.
1178 */
d0c97cfb
AW		 1179static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq,
1180 struct mmc_card *card,
1181 struct request *req)
f4c5522b 1182{
f4c5522b
AW		 1183 if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) {
1184 /* Legacy mode imposes restrictions on transfers. */
1185 if (!IS_ALIGNED(brq->cmd.arg, card->ext_csd.rel_sectors))
1186 brq->data.blocks = 1;
1187
1188 if (brq->data.blocks > card->ext_csd.rel_sectors)
1189 brq->data.blocks = card->ext_csd.rel_sectors;
1190 else if (brq->data.blocks < card->ext_csd.rel_sectors)
1191 brq->data.blocks = 1;
1192 }
f4c5522b
AW		 1193}
1194
4c2b8f26
RKAL		 1195#define CMD_ERRORS \
1196 (R1_OUT_OF_RANGE | /* Command argument out of range */ \
1197 R1_ADDRESS_ERROR | /* Misaligned address */ \
1198 R1_BLOCK_LEN_ERROR | /* Transferred block length incorrect */\
1199 R1_WP_VIOLATION | /* Tried to write to protected block */ \
1200 R1_CC_ERROR | /* Card controller error */ \
1201 R1_ERROR) /* General/unknown error */
1202
ee8a43a5
PF		 1203static int mmc_blk_err_check(struct mmc_card *card,
1204 struct mmc_async_req *areq)
d78d4a8a 1205{
ee8a43a5
PF		 1206 struct mmc_queue_req *mq_mrq = container_of(areq, struct mmc_queue_req,
1207 mmc_active);
1208 struct mmc_blk_request *brq = &mq_mrq->brq;
1209 struct request *req = mq_mrq->req;
b8360a49 1210 int need_retune = card->host->need_retune;
c8760069 1211 int ecc_err = 0, gen_err = 0;
d78d4a8a
PF		 1212
1213 /*
1214 * sbc.error indicates a problem with the set block count
1215 * command. No data will have been transferred.
1216 *
1217 * cmd.error indicates a problem with the r/w command. No
1218 * data will have been transferred.
1219 *
1220 * stop.error indicates a problem with the stop command. Data
1221 * may have been transferred, or may still be transferring.
1222 */
67716327
AH		 1223 if (brq->sbc.error || brq->cmd.error || brq->stop.error ||
1224 brq->data.error) {
c8760069 1225 switch (mmc_blk_cmd_recovery(card, req, brq, &ecc_err, &gen_err)) {
d78d4a8a
PF		 1226 case ERR_RETRY:
1227 return MMC_BLK_RETRY;
1228 case ERR_ABORT:
1229 return MMC_BLK_ABORT;
a8ad82cc
SRT		 1230 case ERR_NOMEDIUM:
1231 return MMC_BLK_NOMEDIUM;
d78d4a8a
PF		 1232 case ERR_CONTINUE:
1233 break;
1234 }
1235 }
1236
1237 /*
1238 * Check for errors relating to the execution of the
1239 * initial command - such as address errors. No data
1240 * has been transferred.
1241 */
1242 if (brq->cmd.resp[0] & CMD_ERRORS) {
1243 pr_err("%s: r/w command failed, status = %#x\n",
1244 req->rq_disk->disk_name, brq->cmd.resp[0]);
1245 return MMC_BLK_ABORT;
1246 }
1247
1248 /*
1249 * Everything else is either success, or a data error of some
1250 * kind. If it was a write, we may have transitioned to
1251 * program mode, which we have to wait for it to complete.
1252 */
1253 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) {
c49433fb 1254 int err;
8fee476b 1255
c8760069
KY		 1256 /* Check stop command response */
1257 if (brq->stop.resp[0] & R1_ERROR) {
1258 pr_err("%s: %s: general error sending stop command, stop cmd response %#x\n",
1259 req->rq_disk->disk_name, __func__,
1260 brq->stop.resp[0]);
1261 gen_err = 1;
1262 }
1263
95a91298
UH		 1264 err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, false, req,
1265 &gen_err);
c49433fb
UH		 1266 if (err)
1267 return MMC_BLK_CMD_ERR;
d78d4a8a
PF		 1268 }
1269
c8760069
KY		 1270 /* if general error occurs, retry the write operation. */
1271 if (gen_err) {
1272 pr_warn("%s: retrying write for general error\n",
1273 req->rq_disk->disk_name);
1274 return MMC_BLK_RETRY;
1275 }
1276
d78d4a8a 1277 if (brq->data.error) {
b8360a49
AH		 1278 if (need_retune && !brq->retune_retry_done) {
1279 pr_info("%s: retrying because a re-tune was needed\n",
1280 req->rq_disk->disk_name);
1281 brq->retune_retry_done = 1;
1282 return MMC_BLK_RETRY;
1283 }
d78d4a8a
PF		 1284 pr_err("%s: error %d transferring data, sector %u, nr %u, cmd response %#x, card status %#x\n",
1285 req->rq_disk->disk_name, brq->data.error,
1286 (unsigned)blk_rq_pos(req),
1287 (unsigned)blk_rq_sectors(req),
1288 brq->cmd.resp[0], brq->stop.resp[0]);
1289
1290 if (rq_data_dir(req) == READ) {
67716327
AH		 1291 if (ecc_err)
1292 return MMC_BLK_ECC_ERR;
d78d4a8a
PF		 1293 return MMC_BLK_DATA_ERR;
1294 } else {
1295 return MMC_BLK_CMD_ERR;
1296 }
1297 }
1298
67716327
AH		 1299 if (!brq->data.bytes_xfered)
1300 return MMC_BLK_RETRY;
d78d4a8a 1301
ce39f9d1
SJ		 1302 if (mmc_packed_cmd(mq_mrq->cmd_type)) {
1303 if (unlikely(brq->data.blocks << 9 != brq->data.bytes_xfered))
1304 return MMC_BLK_PARTIAL;
1305 else
1306 return MMC_BLK_SUCCESS;
1307 }
1308
67716327
AH		 1309 if (blk_rq_bytes(req) != brq->data.bytes_xfered)
1310 return MMC_BLK_PARTIAL;
1311
1312 return MMC_BLK_SUCCESS;
d78d4a8a
PF		 1313}
1314
ce39f9d1
SJ		 1315static int mmc_blk_packed_err_check(struct mmc_card *card,
1316 struct mmc_async_req *areq)
1317{
1318 struct mmc_queue_req *mq_rq = container_of(areq, struct mmc_queue_req,
1319 mmc_active);
1320 struct request *req = mq_rq->req;
1321 struct mmc_packed *packed = mq_rq->packed;
1322 int err, check, status;
1323 u8 *ext_csd;
1324
1325 BUG_ON(!packed);
1326
1327 packed->retries--;
1328 check = mmc_blk_err_check(card, areq);
1329 err = get_card_status(card, &status, 0);
1330 if (err) {
1331 pr_err("%s: error %d sending status command\n",
1332 req->rq_disk->disk_name, err);
1333 return MMC_BLK_ABORT;
1334 }
1335
1336 if (status & R1_EXCEPTION_EVENT) {
86817ffb 1337 err = mmc_get_ext_csd(card, &ext_csd);
ce39f9d1
SJ		 1338 if (err) {
1339 pr_err("%s: error %d sending ext_csd\n",
1340 req->rq_disk->disk_name, err);
86817ffb 1341 return MMC_BLK_ABORT;
ce39f9d1
SJ		 1342 }
1343
1344 if ((ext_csd[EXT_CSD_EXP_EVENTS_STATUS] &
1345 EXT_CSD_PACKED_FAILURE) &&
1346 (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1347 EXT_CSD_PACKED_GENERIC_ERROR)) {
1348 if (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1349 EXT_CSD_PACKED_INDEXED_ERROR) {
1350 packed->idx_failure =
1351 ext_csd[EXT_CSD_PACKED_FAILURE_INDEX] - 1;
1352 check = MMC_BLK_PARTIAL;
1353 }
1354 pr_err("%s: packed cmd failed, nr %u, sectors %u, "
1355 "failure index: %d\n",
1356 req->rq_disk->disk_name, packed->nr_entries,
1357 packed->blocks, packed->idx_failure);
1358 }
ce39f9d1
SJ		 1359 kfree(ext_csd);
1360 }
1361
1362 return check;
1363}
1364
54d49d77
PF		 1365static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
1366 struct mmc_card *card,
1367 int disable_multi,
1368 struct mmc_queue *mq)
1da177e4 1369{
54d49d77
PF		 1370 u32 readcmd, writecmd;
1371 struct mmc_blk_request *brq = &mqrq->brq;
1372 struct request *req = mqrq->req;
1da177e4 1373 struct mmc_blk_data *md = mq->data;
4265900e 1374 bool do_data_tag;
1da177e4 1375
f4c5522b
AW		 1376 /*
1377 * Reliable writes are used to implement Forced Unit Access and
1378 * REQ_META accesses, and are supported only on MMCs.
65299a3b
CH		 1379 *
1380 * XXX: this really needs a good explanation of why REQ_META
1381 * is treated special.
f4c5522b
AW		 1382 */
1383 bool do_rel_wr = ((req->cmd_flags & REQ_FUA) ||
1384 (req->cmd_flags & REQ_META)) &&
1385 (rq_data_dir(req) == WRITE) &&
d0c97cfb 1386 (md->flags & MMC_BLK_REL_WR);
f4c5522b 1387
54d49d77
PF		 1388 memset(brq, 0, sizeof(struct mmc_blk_request));
1389 brq->mrq.cmd = &brq->cmd;
1390 brq->mrq.data = &brq->data;
1da177e4 1391
54d49d77
PF		 1392 brq->cmd.arg = blk_rq_pos(req);
1393 if (!mmc_card_blockaddr(card))
1394 brq->cmd.arg <<= 9;
1395 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1396 brq->data.blksz = 512;
1397 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1398 brq->stop.arg = 0;
54d49d77 1399 brq->data.blocks = blk_rq_sectors(req);
6a79e391 1400
54d49d77
PF		 1401 /*
1402 * The block layer doesn't support all sector count
1403 * restrictions, so we need to be prepared for too big
1404 * requests.
1405 */
1406 if (brq->data.blocks > card->host->max_blk_count)
1407 brq->data.blocks = card->host->max_blk_count;
1da177e4 1408
2bf22b39
PW		 1409 if (brq->data.blocks > 1) {
1410 /*
1411 * After a read error, we redo the request one sector
1412 * at a time in order to accurately determine which
1413 * sectors can be read successfully.
1414 */
1415 if (disable_multi)
1416 brq->data.blocks = 1;
1417
2e47e842
KM		 1418 /*
1419 * Some controllers have HW issues while operating
1420 * in multiple I/O mode
1421 */
1422 if (card->host->ops->multi_io_quirk)
1423 brq->data.blocks = card->host->ops->multi_io_quirk(card,
1424 (rq_data_dir(req) == READ) ?
1425 MMC_DATA_READ : MMC_DATA_WRITE,
1426 brq->data.blocks);
2bf22b39 1427 }
d0c97cfb 1428
54d49d77
PF		 1429 if (brq->data.blocks > 1 || do_rel_wr) {
1430 /* SPI multiblock writes terminate using a special
1431 * token, not a STOP_TRANSMISSION request.
d0c97cfb 1432 */
54d49d77
PF		 1433 if (!mmc_host_is_spi(card->host) ||
1434 rq_data_dir(req) == READ)
1435 brq->mrq.stop = &brq->stop;
1436 readcmd = MMC_READ_MULTIPLE_BLOCK;
1437 writecmd = MMC_WRITE_MULTIPLE_BLOCK;
1438 } else {
1439 brq->mrq.stop = NULL;
1440 readcmd = MMC_READ_SINGLE_BLOCK;
1441 writecmd = MMC_WRITE_BLOCK;
1442 }
1443 if (rq_data_dir(req) == READ) {
1444 brq->cmd.opcode = readcmd;
1445 brq->data.flags |= MMC_DATA_READ;
bcc3e172
UH		 1446 if (brq->mrq.stop)
1447 brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 |
1448 MMC_CMD_AC;
54d49d77
PF		 1449 } else {
1450 brq->cmd.opcode = writecmd;
1451 brq->data.flags |= MMC_DATA_WRITE;
bcc3e172
UH		 1452 if (brq->mrq.stop)
1453 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B |
1454 MMC_CMD_AC;
54d49d77 1455 }
d0c97cfb 1456
54d49d77
PF		 1457 if (do_rel_wr)
1458 mmc_apply_rel_rw(brq, card, req);
f4c5522b 1459
4265900e
SD		 1460 /*
1461 * Data tag is used only during writing meta data to speed
1462 * up write and any subsequent read of this meta data
1463 */
1464 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1465 (req->cmd_flags & REQ_META) &&
1466 (rq_data_dir(req) == WRITE) &&
1467 ((brq->data.blocks * brq->data.blksz) >=
1468 card->ext_csd.data_tag_unit_size);
1469
54d49d77
PF		 1470 /*
1471 * Pre-defined multi-block transfers are preferable to
1472 * open ended-ones (and necessary for reliable writes).
1473 * However, it is not sufficient to just send CMD23,
1474 * and avoid the final CMD12, as on an error condition
1475 * CMD12 (stop) needs to be sent anyway. This, coupled
1476 * with Auto-CMD23 enhancements provided by some
1477 * hosts, means that the complexity of dealing
1478 * with this is best left to the host. If CMD23 is
1479 * supported by card and host, we'll fill sbc in and let
1480 * the host deal with handling it correctly. This means
1481 * that for hosts that don't expose MMC_CAP_CMD23, no
1482 * change of behavior will be observed.
1483 *
1484 * N.B: Some MMC cards experience perf degradation.
1485 * We'll avoid using CMD23-bounded multiblock writes for
1486 * these, while retaining features like reliable writes.
1487 */
4265900e
SD		 1488 if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) &&
1489 (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) ||
1490 do_data_tag)) {
54d49d77
PF		 1491 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1492 brq->sbc.arg = brq->data.blocks |
4265900e
SD		 1493 (do_rel_wr ? (1 << 31) : 0) |
1494 (do_data_tag ? (1 << 29) : 0);
54d49d77
PF		 1495 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1496 brq->mrq.sbc = &brq->sbc;
1497 }
98ccf149 1498
54d49d77
PF		 1499 mmc_set_data_timeout(&brq->data, card);
1500
1501 brq->data.sg = mqrq->sg;
1502 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1503
1504 /*
1505 * Adjust the sg list so it is the same size as the
1506 * request.
1507 */
1508 if (brq->data.blocks != blk_rq_sectors(req)) {
1509 int i, data_size = brq->data.blocks << 9;
1510 struct scatterlist *sg;
1511
1512 for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) {
1513 data_size -= sg->length;
1514 if (data_size <= 0) {
1515 sg->length += data_size;
1516 i++;
1517 break;
6a79e391 1518 }
6a79e391 1519 }
54d49d77
PF		 1520 brq->data.sg_len = i;
1521 }
1522
ee8a43a5
PF		 1523 mqrq->mmc_active.mrq = &brq->mrq;
1524 mqrq->mmc_active.err_check = mmc_blk_err_check;
1525
54d49d77
PF		 1526 mmc_queue_bounce_pre(mqrq);
1527}
6a79e391 1528
ce39f9d1
SJ		 1529static inline u8 mmc_calc_packed_hdr_segs(struct request_queue *q,
1530 struct mmc_card *card)
1531{
1532 unsigned int hdr_sz = mmc_large_sector(card) ? 4096 : 512;
1533 unsigned int max_seg_sz = queue_max_segment_size(q);
1534 unsigned int len, nr_segs = 0;
1535
1536 do {
1537 len = min(hdr_sz, max_seg_sz);
1538 hdr_sz -= len;
1539 nr_segs++;
1540 } while (hdr_sz);
1541
1542 return nr_segs;
1543}
1544
1545static u8 mmc_blk_prep_packed_list(struct mmc_queue *mq, struct request *req)
1546{
1547 struct request_queue *q = mq->queue;
1548 struct mmc_card *card = mq->card;
1549 struct request *cur = req, *next = NULL;
1550 struct mmc_blk_data *md = mq->data;
1551 struct mmc_queue_req *mqrq = mq->mqrq_cur;
1552 bool en_rel_wr = card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN;
1553 unsigned int req_sectors = 0, phys_segments = 0;
1554 unsigned int max_blk_count, max_phys_segs;
1555 bool put_back = true;
1556 u8 max_packed_rw = 0;
1557 u8 reqs = 0;
1558
1559 if (!(md->flags & MMC_BLK_PACKED_CMD))
1560 goto no_packed;
1561
1562 if ((rq_data_dir(cur) == WRITE) &&
1563 mmc_host_packed_wr(card->host))
1564 max_packed_rw = card->ext_csd.max_packed_writes;
1565
1566 if (max_packed_rw == 0)
1567 goto no_packed;
1568
1569 if (mmc_req_rel_wr(cur) &&
1570 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1571 goto no_packed;
1572
1573 if (mmc_large_sector(card) &&
1574 !IS_ALIGNED(blk_rq_sectors(cur), 8))
1575 goto no_packed;
1576
1577 mmc_blk_clear_packed(mqrq);
1578
1579 max_blk_count = min(card->host->max_blk_count,
1580 card->host->max_req_size >> 9);
1581 if (unlikely(max_blk_count > 0xffff))
1582 max_blk_count = 0xffff;
1583
1584 max_phys_segs = queue_max_segments(q);
1585 req_sectors += blk_rq_sectors(cur);
1586 phys_segments += cur->nr_phys_segments;
1587
1588 if (rq_data_dir(cur) == WRITE) {
1589 req_sectors += mmc_large_sector(card) ? 8 : 1;
1590 phys_segments += mmc_calc_packed_hdr_segs(q, card);
1591 }
1592
1593 do {
1594 if (reqs >= max_packed_rw - 1) {
1595 put_back = false;
1596 break;
1597 }
1598
1599 spin_lock_irq(q->queue_lock);
1600 next = blk_fetch_request(q);
1601 spin_unlock_irq(q->queue_lock);
1602 if (!next) {
1603 put_back = false;
1604 break;
1605 }
1606
1607 if (mmc_large_sector(card) &&
1608 !IS_ALIGNED(blk_rq_sectors(next), 8))
1609 break;
1610
1611 if (next->cmd_flags & REQ_DISCARD ||
1612 next->cmd_flags & REQ_FLUSH)
1613 break;
1614
1615 if (rq_data_dir(cur) != rq_data_dir(next))
1616 break;
1617
1618 if (mmc_req_rel_wr(next) &&
1619 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1620 break;
1621
1622 req_sectors += blk_rq_sectors(next);
1623 if (req_sectors > max_blk_count)
1624 break;
1625
1626 phys_segments += next->nr_phys_segments;
1627 if (phys_segments > max_phys_segs)
1628 break;
1629
1630 list_add_tail(&next->queuelist, &mqrq->packed->list);
1631 cur = next;
1632 reqs++;
1633 } while (1);
1634
1635 if (put_back) {
1636 spin_lock_irq(q->queue_lock);
1637 blk_requeue_request(q, next);
1638 spin_unlock_irq(q->queue_lock);
1639 }
1640
1641 if (reqs > 0) {
1642 list_add(&req->queuelist, &mqrq->packed->list);
1643 mqrq->packed->nr_entries = ++reqs;
1644 mqrq->packed->retries = reqs;
1645 return reqs;
1646 }
1647
1648no_packed:
1649 mqrq->cmd_type = MMC_PACKED_NONE;
1650 return 0;
1651}
1652
1653static void mmc_blk_packed_hdr_wrq_prep(struct mmc_queue_req *mqrq,
1654 struct mmc_card *card,
1655 struct mmc_queue *mq)
1656{
1657 struct mmc_blk_request *brq = &mqrq->brq;
1658 struct request *req = mqrq->req;
1659 struct request *prq;
1660 struct mmc_blk_data *md = mq->data;
1661 struct mmc_packed *packed = mqrq->packed;
1662 bool do_rel_wr, do_data_tag;
1663 u32 *packed_cmd_hdr;
1664 u8 hdr_blocks;
1665 u8 i = 1;
1666
1667 BUG_ON(!packed);
1668
1669 mqrq->cmd_type = MMC_PACKED_WRITE;
1670 packed->blocks = 0;
1671 packed->idx_failure = MMC_PACKED_NR_IDX;
1672
1673 packed_cmd_hdr = packed->cmd_hdr;
1674 memset(packed_cmd_hdr, 0, sizeof(packed->cmd_hdr));
1675 packed_cmd_hdr[0] = (packed->nr_entries << 16) |
1676 (PACKED_CMD_WR << 8) | PACKED_CMD_VER;
1677 hdr_blocks = mmc_large_sector(card) ? 8 : 1;
1678
1679 /*
1680 * Argument for each entry of packed group
1681 */
1682 list_for_each_entry(prq, &packed->list, queuelist) {
1683 do_rel_wr = mmc_req_rel_wr(prq) && (md->flags & MMC_BLK_REL_WR);
1684 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1685 (prq->cmd_flags & REQ_META) &&
1686 (rq_data_dir(prq) == WRITE) &&
1687 ((brq->data.blocks * brq->data.blksz) >=
1688 card->ext_csd.data_tag_unit_size);
1689 /* Argument of CMD23 */
1690 packed_cmd_hdr[(i * 2)] =
1691 (do_rel_wr ? MMC_CMD23_ARG_REL_WR : 0) |
1692 (do_data_tag ? MMC_CMD23_ARG_TAG_REQ : 0) |
1693 blk_rq_sectors(prq);
1694 /* Argument of CMD18 or CMD25 */
1695 packed_cmd_hdr[((i * 2)) + 1] =
1696 mmc_card_blockaddr(card) ?
1697 blk_rq_pos(prq) : blk_rq_pos(prq) << 9;
1698 packed->blocks += blk_rq_sectors(prq);
1699 i++;
1700 }
1701
1702 memset(brq, 0, sizeof(struct mmc_blk_request));
1703 brq->mrq.cmd = &brq->cmd;
1704 brq->mrq.data = &brq->data;
1705 brq->mrq.sbc = &brq->sbc;
1706 brq->mrq.stop = &brq->stop;
1707
1708 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1709 brq->sbc.arg = MMC_CMD23_ARG_PACKED | (packed->blocks + hdr_blocks);
1710 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1711
1712 brq->cmd.opcode = MMC_WRITE_MULTIPLE_BLOCK;
1713 brq->cmd.arg = blk_rq_pos(req);
1714 if (!mmc_card_blockaddr(card))
1715 brq->cmd.arg <<= 9;
1716 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1717
1718 brq->data.blksz = 512;
1719 brq->data.blocks = packed->blocks + hdr_blocks;
1720 brq->data.flags |= MMC_DATA_WRITE;
1721
1722 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1723 brq->stop.arg = 0;
1724 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
1725
1726 mmc_set_data_timeout(&brq->data, card);
1727
1728 brq->data.sg = mqrq->sg;
1729 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1730
1731 mqrq->mmc_active.mrq = &brq->mrq;
1732 mqrq->mmc_active.err_check = mmc_blk_packed_err_check;
1733
1734 mmc_queue_bounce_pre(mqrq);
1735}
1736
67716327
AH		 1737static int mmc_blk_cmd_err(struct mmc_blk_data *md, struct mmc_card *card,
1738 struct mmc_blk_request *brq, struct request *req,
1739 int ret)
1740{
ce39f9d1
SJ		 1741 struct mmc_queue_req *mq_rq;
1742 mq_rq = container_of(brq, struct mmc_queue_req, brq);
1743
67716327
AH		 1744 /*
1745 * If this is an SD card and we're writing, we can first
1746 * mark the known good sectors as ok.
1747 *
1748 * If the card is not SD, we can still ok written sectors
1749 * as reported by the controller (which might be less than
1750 * the real number of written sectors, but never more).
1751 */
1752 if (mmc_card_sd(card)) {
1753 u32 blocks;
1754
1755 blocks = mmc_sd_num_wr_blocks(card);
1756 if (blocks != (u32)-1) {
ecf8b5d0 1757 ret = blk_end_request(req, 0, blocks << 9);
67716327
AH		 1758 }
1759 } else {
ce39f9d1
SJ		 1760 if (!mmc_packed_cmd(mq_rq->cmd_type))
1761 ret = blk_end_request(req, 0, brq->data.bytes_xfered);
67716327
AH		 1762 }
1763 return ret;
1764}
1765
ce39f9d1
SJ		 1766static int mmc_blk_end_packed_req(struct mmc_queue_req *mq_rq)
1767{
1768 struct request *prq;
1769 struct mmc_packed *packed = mq_rq->packed;
1770 int idx = packed->idx_failure, i = 0;
1771 int ret = 0;
1772
1773 BUG_ON(!packed);
1774
1775 while (!list_empty(&packed->list)) {
1776 prq = list_entry_rq(packed->list.next);
1777 if (idx == i) {
1778 /* retry from error index */
1779 packed->nr_entries -= idx;
1780 mq_rq->req = prq;
1781 ret = 1;
1782
1783 if (packed->nr_entries == MMC_PACKED_NR_SINGLE) {
1784 list_del_init(&prq->queuelist);
1785 mmc_blk_clear_packed(mq_rq);
1786 }
1787 return ret;
1788 }
1789 list_del_init(&prq->queuelist);
1790 blk_end_request(prq, 0, blk_rq_bytes(prq));
1791 i++;
1792 }
1793
1794 mmc_blk_clear_packed(mq_rq);
1795 return ret;
1796}
1797
1798static void mmc_blk_abort_packed_req(struct mmc_queue_req *mq_rq)
1799{
1800 struct request *prq;
1801 struct mmc_packed *packed = mq_rq->packed;
1802
1803 BUG_ON(!packed);
1804
1805 while (!list_empty(&packed->list)) {
1806 prq = list_entry_rq(packed->list.next);
1807 list_del_init(&prq->queuelist);
1808 blk_end_request(prq, -EIO, blk_rq_bytes(prq));
1809 }
1810
1811 mmc_blk_clear_packed(mq_rq);
1812}
1813
1814static void mmc_blk_revert_packed_req(struct mmc_queue *mq,
1815 struct mmc_queue_req *mq_rq)
1816{
1817 struct request *prq;
1818 struct request_queue *q = mq->queue;
1819 struct mmc_packed *packed = mq_rq->packed;
1820
1821 BUG_ON(!packed);
1822
1823 while (!list_empty(&packed->list)) {
1824 prq = list_entry_rq(packed->list.prev);
1825 if (prq->queuelist.prev != &packed->list) {
1826 list_del_init(&prq->queuelist);
1827 spin_lock_irq(q->queue_lock);
1828 blk_requeue_request(mq->queue, prq);
1829 spin_unlock_irq(q->queue_lock);
1830 } else {
1831 list_del_init(&prq->queuelist);
1832 }
1833 }
1834
1835 mmc_blk_clear_packed(mq_rq);
1836}
1837
ee8a43a5 1838static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc)
54d49d77
PF		 1839{
1840 struct mmc_blk_data *md = mq->data;
1841 struct mmc_card *card = md->queue.card;
1842 struct mmc_blk_request *brq = &mq->mqrq_cur->brq;
b8360a49 1843 int ret = 1, disable_multi = 0, retry = 0, type, retune_retry_done = 0;
d78d4a8a 1844 enum mmc_blk_status status;
ee8a43a5 1845 struct mmc_queue_req *mq_rq;
a5075eb9 1846 struct request *req = rqc;
ee8a43a5 1847 struct mmc_async_req *areq;
ce39f9d1
SJ		 1848 const u8 packed_nr = 2;
1849 u8 reqs = 0;
1da177e4 1850
ee8a43a5
PF		 1851 if (!rqc && !mq->mqrq_prev->req)
1852 return 0;
98ccf149 1853
ce39f9d1
SJ		 1854 if (rqc)
1855 reqs = mmc_blk_prep_packed_list(mq, rqc);
1856
ee8a43a5
PF		 1857 do {
1858 if (rqc) {
a5075eb9
SD		 1859 /*
1860 * When 4KB native sector is enabled, only 8 blocks
1861 * multiple read or write is allowed
1862 */
1863 if ((brq->data.blocks & 0x07) &&
1864 (card->ext_csd.data_sector_size == 4096)) {
1865 pr_err("%s: Transfer size is not 4KB sector size aligned\n",
1866 req->rq_disk->disk_name);
ce39f9d1 1867 mq_rq = mq->mqrq_cur;
a5075eb9
SD		 1868 goto cmd_abort;
1869 }
ce39f9d1
SJ		 1870
1871 if (reqs >= packed_nr)
1872 mmc_blk_packed_hdr_wrq_prep(mq->mqrq_cur,
1873 card, mq);
1874 else
1875 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
ee8a43a5
PF		 1876 areq = &mq->mqrq_cur->mmc_active;
1877 } else
1878 areq = NULL;
1879 areq = mmc_start_req(card->host, areq, (int *) &status);
2220eedf
KD		 1880 if (!areq) {
1881 if (status == MMC_BLK_NEW_REQUEST)
1882 mq->flags |= MMC_QUEUE_NEW_REQUEST;
ee8a43a5 1883 return 0;
2220eedf 1884 }
ee8a43a5
PF		 1885
1886 mq_rq = container_of(areq, struct mmc_queue_req, mmc_active);
1887 brq = &mq_rq->brq;
1888 req = mq_rq->req;
67716327 1889 type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
ee8a43a5 1890 mmc_queue_bounce_post(mq_rq);
98ccf149 1891
d78d4a8a
PF		 1892 switch (status) {
1893 case MMC_BLK_SUCCESS:
1894 case MMC_BLK_PARTIAL:
1895 /*
1896 * A block was successfully transferred.
1897 */
67716327 1898 mmc_blk_reset_success(md, type);
ce39f9d1
SJ		 1899
1900 if (mmc_packed_cmd(mq_rq->cmd_type)) {
1901 ret = mmc_blk_end_packed_req(mq_rq);
1902 break;
1903 } else {
1904 ret = blk_end_request(req, 0,
d78d4a8a 1905 brq->data.bytes_xfered);
ce39f9d1
SJ		 1906 }
1907
67716327
AH		 1908 /*
1909 * If the blk_end_request function returns non-zero even
1910 * though all data has been transferred and no errors
1911 * were returned by the host controller, it's a bug.
1912 */
ee8a43a5 1913 if (status == MMC_BLK_SUCCESS && ret) {
a3c76eb9 1914 pr_err("%s BUG rq_tot %d d_xfer %d\n",
ee8a43a5
PF		 1915 __func__, blk_rq_bytes(req),
1916 brq->data.bytes_xfered);
1917 rqc = NULL;
1918 goto cmd_abort;
1919 }
d78d4a8a
PF		 1920 break;
1921 case MMC_BLK_CMD_ERR:
67716327 1922 ret = mmc_blk_cmd_err(md, card, brq, req, ret);
29535f7b
DW		 1923 if (mmc_blk_reset(md, card->host, type))
1924 goto cmd_abort;
1925 if (!ret)
1926 goto start_new_req;
1927 break;
d78d4a8a 1928 case MMC_BLK_RETRY:
b8360a49 1929 retune_retry_done = brq->retune_retry_done;
d78d4a8a 1930 if (retry++ < 5)
a01f3ccf 1931 break;
67716327 1932 /* Fall through */
d78d4a8a 1933 case MMC_BLK_ABORT:
67716327
AH		 1934 if (!mmc_blk_reset(md, card->host, type))
1935 break;
4c2b8f26 1936 goto cmd_abort;
67716327
AH		 1937 case MMC_BLK_DATA_ERR: {
1938 int err;
1939
1940 err = mmc_blk_reset(md, card->host, type);
1941 if (!err)
1942 break;
ce39f9d1
SJ		 1943 if (err == -ENODEV ||
1944 mmc_packed_cmd(mq_rq->cmd_type))
67716327
AH		 1945 goto cmd_abort;
1946 /* Fall through */
1947 }
1948 case MMC_BLK_ECC_ERR:
1949 if (brq->data.blocks > 1) {
1950 /* Redo read one sector at a time */
6606110d
JP		 1951 pr_warn("%s: retrying using single block read\n",
1952 req->rq_disk->disk_name);
67716327
AH		 1953 disable_multi = 1;
1954 break;
1955 }
d78d4a8a
PF		 1956 /*
1957 * After an error, we redo I/O one sector at a
1958 * time, so we only reach here after trying to
1959 * read a single sector.
1960 */
ecf8b5d0 1961 ret = blk_end_request(req, -EIO,
d78d4a8a 1962 brq->data.blksz);
ee8a43a5
PF		 1963 if (!ret)
1964 goto start_new_req;
d78d4a8a 1965 break;
a8ad82cc
SRT		 1966 case MMC_BLK_NOMEDIUM:
1967 goto cmd_abort;
2220eedf
KD		 1968 default:
1969 pr_err("%s: Unhandled return value (%d)",
1970 req->rq_disk->disk_name, status);
1971 goto cmd_abort;
4c2b8f26
RKAL		 1972 }
1973
ee8a43a5 1974 if (ret) {
ce39f9d1
SJ		 1975 if (mmc_packed_cmd(mq_rq->cmd_type)) {
1976 if (!mq_rq->packed->retries)
1977 goto cmd_abort;
1978 mmc_blk_packed_hdr_wrq_prep(mq_rq, card, mq);
1979 mmc_start_req(card->host,
1980 &mq_rq->mmc_active, NULL);
1981 } else {
1982
1983 /*
1984 * In case of a incomplete request
1985 * prepare it again and resend.
1986 */
1987 mmc_blk_rw_rq_prep(mq_rq, card,
1988 disable_multi, mq);
1989 mmc_start_req(card->host,
1990 &mq_rq->mmc_active, NULL);
1991 }
b8360a49 1992 mq_rq->brq.retune_retry_done = retune_retry_done;
ee8a43a5 1993 }
1da177e4
LT		 1994 } while (ret);
1995
1da177e4
LT		 1996 return 1;
1997
a01f3ccf 1998 cmd_abort:
ce39f9d1
SJ		 1999 if (mmc_packed_cmd(mq_rq->cmd_type)) {
2000 mmc_blk_abort_packed_req(mq_rq);
2001 } else {
2002 if (mmc_card_removed(card))
2003 req->cmd_flags |= REQ_QUIET;
2004 while (ret)
2005 ret = blk_end_request(req, -EIO,
2006 blk_rq_cur_bytes(req));
2007 }
1da177e4 2008
ee8a43a5
PF		 2009 start_new_req:
2010 if (rqc) {
7a81902f
SJ		 2011 if (mmc_card_removed(card)) {
2012 rqc->cmd_flags |= REQ_QUIET;
2013 blk_end_request_all(rqc, -EIO);
2014 } else {
ce39f9d1
SJ		 2015 /*
2016 * If current request is packed, it needs to put back.
2017 */
2018 if (mmc_packed_cmd(mq->mqrq_cur->cmd_type))
2019 mmc_blk_revert_packed_req(mq, mq->mqrq_cur);
2020
7a81902f
SJ		 2021 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
2022 mmc_start_req(card->host,
2023 &mq->mqrq_cur->mmc_active, NULL);
2024 }
ee8a43a5
PF		 2025 }
2026
1da177e4
LT		 2027 return 0;
2028}
2029
bd788c96
AH		 2030static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
2031{
1a258db6
AW		 2032 int ret;
2033 struct mmc_blk_data *md = mq->data;
2034 struct mmc_card *card = md->queue.card;
2220eedf
KD		 2035 struct mmc_host *host = card->host;
2036 unsigned long flags;
f662ae48 2037 unsigned int cmd_flags = req ? req->cmd_flags : 0;
1a258db6 2038
ee8a43a5
PF		 2039 if (req && !mq->mqrq_prev->req)
2040 /* claim host only for the first request */
e94cfef6 2041 mmc_get_card(card);
ee8a43a5 2042
371a689f
AW		 2043 ret = mmc_blk_part_switch(card, md);
2044 if (ret) {
0d7d85ca 2045 if (req) {
ecf8b5d0 2046 blk_end_request_all(req, -EIO);
0d7d85ca 2047 }
371a689f
AW		 2048 ret = 0;
2049 goto out;
2050 }
1a258db6 2051
2220eedf 2052 mq->flags &= ~MMC_QUEUE_NEW_REQUEST;
f662ae48 2053 if (cmd_flags & REQ_DISCARD) {
ee8a43a5
PF		 2054 /* complete ongoing async transfer before issuing discard */
2055 if (card->host->areq)
2056 mmc_blk_issue_rw_rq(mq, NULL);
5204d00f 2057 if (req->cmd_flags & REQ_SECURE)
1a258db6 2058 ret = mmc_blk_issue_secdiscard_rq(mq, req);
49804548 2059 else
1a258db6 2060 ret = mmc_blk_issue_discard_rq(mq, req);
f662ae48 2061 } else if (cmd_flags & REQ_FLUSH) {
393f9a08
JC		 2062 /* complete ongoing async transfer before issuing flush */
2063 if (card->host->areq)
2064 mmc_blk_issue_rw_rq(mq, NULL);
1a258db6 2065 ret = mmc_blk_issue_flush(mq, req);
49804548 2066 } else {
2220eedf
KD		 2067 if (!req && host->areq) {
2068 spin_lock_irqsave(&host->context_info.lock, flags);
2069 host->context_info.is_waiting_last_req = true;
2070 spin_unlock_irqrestore(&host->context_info.lock, flags);
2071 }
1a258db6 2072 ret = mmc_blk_issue_rw_rq(mq, req);
49804548 2073 }
1a258db6 2074
371a689f 2075out:
ef3a69c7 2076 if ((!req && !(mq->flags & MMC_QUEUE_NEW_REQUEST)) ||
f662ae48 2077 (cmd_flags & MMC_REQ_SPECIAL_MASK))
ef3a69c7
SJ		 2078 /*
2079 * Release host when there are no more requests
2080 * and after special request(discard, flush) is done.
2081 * In case sepecial request, there is no reentry to
2082 * the 'mmc_blk_issue_rq' with 'mqrq_prev->req'.
2083 */
e94cfef6 2084 mmc_put_card(card);
1a258db6 2085 return ret;
bd788c96 2086}
1da177e4 2087
a6f6c96b
RK		 2088static inline int mmc_blk_readonly(struct mmc_card *card)
2089{
2090 return mmc_card_readonly(card) ||
2091 !(card->csd.cmdclass & CCC_BLOCK_WRITE);
2092}
2093
371a689f
AW		 2094static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
2095 struct device *parent,
2096 sector_t size,
2097 bool default_ro,
add710ea
JR		 2098 const char *subname,
2099 int area_type)
1da177e4
LT		 2100{
2101 struct mmc_blk_data *md;
2102 int devidx, ret;
2103
5e71b7a6
OJ		 2104 devidx = find_first_zero_bit(dev_use, max_devices);
2105 if (devidx >= max_devices)
1da177e4
LT		 2106 return ERR_PTR(-ENOSPC);
2107 __set_bit(devidx, dev_use);
2108
dd00cc48 2109 md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL);
a6f6c96b
RK		 2110 if (!md) {
2111 ret = -ENOMEM;
2112 goto out;
2113 }
1da177e4 2114
f06c9153
AW		 2115 /*
2116 * !subname implies we are creating main mmc_blk_data that will be
fc95e30b 2117 * associated with mmc_card with dev_set_drvdata. Due to device
f06c9153
AW		 2118 * partitions, devidx will not coincide with a per-physical card
2119 * index anymore so we keep track of a name index.
2120 */
2121 if (!subname) {
2122 md->name_idx = find_first_zero_bit(name_use, max_devices);
2123 __set_bit(md->name_idx, name_use);
add710ea 2124 } else
f06c9153
AW		 2125 md->name_idx = ((struct mmc_blk_data *)
2126 dev_to_disk(parent)->private_data)->name_idx;
2127
add710ea
JR		 2128 md->area_type = area_type;
2129
a6f6c96b
RK		 2130 /*
2131 * Set the read-only status based on the supported commands
2132 * and the write protect switch.
2133 */
2134 md->read_only = mmc_blk_readonly(card);
1da177e4 2135
5e71b7a6 2136 md->disk = alloc_disk(perdev_minors);
a6f6c96b
RK		 2137 if (md->disk == NULL) {
2138 ret = -ENOMEM;
2139 goto err_kfree;
2140 }
1da177e4 2141
a6f6c96b 2142 spin_lock_init(&md->lock);
371a689f 2143 INIT_LIST_HEAD(&md->part);
a6f6c96b 2144 md->usage = 1;
1da177e4 2145
d09408ad 2146 ret = mmc_init_queue(&md->queue, card, &md->lock, subname);
a6f6c96b
RK		 2147 if (ret)
2148 goto err_putdisk;
1da177e4 2149
a6f6c96b
RK		 2150 md->queue.issue_fn = mmc_blk_issue_rq;
2151 md->queue.data = md;
d2b18394 2152
fe6b4c88 2153 md->disk->major = MMC_BLOCK_MAJOR;
5e71b7a6 2154 md->disk->first_minor = devidx * perdev_minors;
a6f6c96b
RK		 2155 md->disk->fops = &mmc_bdops;
2156 md->disk->private_data = md;
2157 md->disk->queue = md->queue.queue;
371a689f
AW		 2158 md->disk->driverfs_dev = parent;
2159 set_disk_ro(md->disk, md->read_only || default_ro);
f5b4d71f 2160 if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT))
53d8f974 2161 md->disk->flags |= GENHD_FL_NO_PART_SCAN;
a6f6c96b
RK		 2162
2163 /*
2164 * As discussed on lkml, GENHD_FL_REMOVABLE should:
2165 *
2166 * - be set for removable media with permanent block devices
2167 * - be unset for removable block devices with permanent media
2168 *
2169 * Since MMC block devices clearly fall under the second
2170 * case, we do not set GENHD_FL_REMOVABLE. Userspace
2171 * should use the block device creation/destruction hotplug
2172 * messages to tell when the card is present.
2173 */
2174
f06c9153 2175 snprintf(md->disk->disk_name, sizeof(md->disk->disk_name),
fe821915 2176 "mmcblk%u%s", md->name_idx, subname ? subname : "");
a6f6c96b 2177
a5075eb9
SD		 2178 if (mmc_card_mmc(card))
2179 blk_queue_logical_block_size(md->queue.queue,
2180 card->ext_csd.data_sector_size);
2181 else
2182 blk_queue_logical_block_size(md->queue.queue, 512);
2183
371a689f 2184 set_capacity(md->disk, size);
d0c97cfb 2185
f0d89972
AW		 2186 if (mmc_host_cmd23(card->host)) {
2187 if (mmc_card_mmc(card) ||
2188 (mmc_card_sd(card) &&
2189 card->scr.cmds & SD_SCR_CMD23_SUPPORT))
2190 md->flags |= MMC_BLK_CMD23;
2191 }
d0c97cfb
AW		 2192
2193 if (mmc_card_mmc(card) &&
2194 md->flags & MMC_BLK_CMD23 &&
2195 ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) ||
2196 card->ext_csd.rel_sectors)) {
2197 md->flags |= MMC_BLK_REL_WR;
2198 blk_queue_flush(md->queue.queue, REQ_FLUSH | REQ_FUA);
2199 }
2200
ce39f9d1
SJ		 2201 if (mmc_card_mmc(card) &&
2202 (area_type == MMC_BLK_DATA_AREA_MAIN) &&
2203 (md->flags & MMC_BLK_CMD23) &&
2204 card->ext_csd.packed_event_en) {
2205 if (!mmc_packed_init(&md->queue, card))
2206 md->flags |= MMC_BLK_PACKED_CMD;
2207 }
2208
371a689f
AW		 2209 return md;
2210
2211 err_putdisk:
2212 put_disk(md->disk);
2213 err_kfree:
2214 kfree(md);
2215 out:
2216 return ERR_PTR(ret);
2217}
2218
2219static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
2220{
2221 sector_t size;
a6f6c96b 2222
85a18ad9
PO		 2223 if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) {
2224 /*
2225 * The EXT_CSD sector count is in number or 512 byte
2226 * sectors.
2227 */
371a689f 2228 size = card->ext_csd.sectors;
85a18ad9
PO		 2229 } else {
2230 /*
2231 * The CSD capacity field is in units of read_blkbits.
2232 * set_capacity takes units of 512 bytes.
2233 */
087de9ed
KM		 2234 size = (typeof(sector_t))card->csd.capacity
2235 << (card->csd.read_blkbits - 9);
85a18ad9 2236 }
371a689f 2237
7a30f2af 2238 return mmc_blk_alloc_req(card, &card->dev, size, false, NULL,
add710ea 2239 MMC_BLK_DATA_AREA_MAIN);
371a689f 2240}
a6f6c96b 2241
371a689f
AW		 2242static int mmc_blk_alloc_part(struct mmc_card *card,
2243 struct mmc_blk_data *md,
2244 unsigned int part_type,
2245 sector_t size,
2246 bool default_ro,
add710ea
JR		 2247 const char *subname,
2248 int area_type)
371a689f
AW		 2249{
2250 char cap_str[10];
2251 struct mmc_blk_data *part_md;
2252
2253 part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro,
add710ea 2254 subname, area_type);
371a689f
AW		 2255 if (IS_ERR(part_md))
2256 return PTR_ERR(part_md);
2257 part_md->part_type = part_type;
2258 list_add(&part_md->part, &md->part);
2259
b9f28d86 2260 string_get_size((u64)get_capacity(part_md->disk), 512, STRING_UNITS_2,
371a689f 2261 cap_str, sizeof(cap_str));
a3c76eb9 2262 pr_info("%s: %s %s partition %u %s\n",
371a689f
AW		 2263 part_md->disk->disk_name, mmc_card_id(card),
2264 mmc_card_name(card), part_md->part_type, cap_str);
2265 return 0;
2266}
2267
e0c368d5
NJ		 2268/* MMC Physical partitions consist of two boot partitions and
2269 * up to four general purpose partitions.
2270 * For each partition enabled in EXT_CSD a block device will be allocatedi
2271 * to provide access to the partition.
2272 */
2273
371a689f
AW		 2274static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md)
2275{
e0c368d5 2276 int idx, ret = 0;
371a689f
AW		 2277
2278 if (!mmc_card_mmc(card))
2279 return 0;
2280
e0c368d5
NJ		 2281 for (idx = 0; idx < card->nr_parts; idx++) {
2282 if (card->part[idx].size) {
2283 ret = mmc_blk_alloc_part(card, md,
2284 card->part[idx].part_cfg,
2285 card->part[idx].size >> 9,
2286 card->part[idx].force_ro,
add710ea
JR		 2287 card->part[idx].name,
2288 card->part[idx].area_type);
e0c368d5
NJ		 2289 if (ret)
2290 return ret;
2291 }
371a689f
AW		 2292 }
2293
2294 return ret;
1da177e4
LT		 2295}
2296
371a689f
AW		 2297static void mmc_blk_remove_req(struct mmc_blk_data *md)
2298{
add710ea
JR		 2299 struct mmc_card *card;
2300
371a689f 2301 if (md) {
fdfa20c1
PT		 2302 /*
2303 * Flush remaining requests and free queues. It
2304 * is freeing the queue that stops new requests
2305 * from being accepted.
2306 */
8efb83a2 2307 card = md->queue.card;
fdfa20c1
PT		 2308 mmc_cleanup_queue(&md->queue);
2309 if (md->flags & MMC_BLK_PACKED_CMD)
2310 mmc_packed_clean(&md->queue);
371a689f
AW		 2311 if (md->disk->flags & GENHD_FL_UP) {
2312 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
add710ea
JR		 2313 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2314 card->ext_csd.boot_ro_lockable)
2315 device_remove_file(disk_to_dev(md->disk),
2316 &md->power_ro_lock);
371a689f 2317
371a689f
AW		 2318 del_gendisk(md->disk);
2319 }
371a689f
AW		 2320 mmc_blk_put(md);
2321 }
2322}
2323
2324static void mmc_blk_remove_parts(struct mmc_card *card,
2325 struct mmc_blk_data *md)
2326{
2327 struct list_head *pos, *q;
2328 struct mmc_blk_data *part_md;
2329
f06c9153 2330 __clear_bit(md->name_idx, name_use);
371a689f
AW		 2331 list_for_each_safe(pos, q, &md->part) {
2332 part_md = list_entry(pos, struct mmc_blk_data, part);
2333 list_del(pos);
2334 mmc_blk_remove_req(part_md);
2335 }
2336}
2337
2338static int mmc_add_disk(struct mmc_blk_data *md)
2339{
2340 int ret;
add710ea 2341 struct mmc_card *card = md->queue.card;
371a689f
AW		 2342
2343 add_disk(md->disk);
2344 md->force_ro.show = force_ro_show;
2345 md->force_ro.store = force_ro_store;
641c3187 2346 sysfs_attr_init(&md->force_ro.attr);
371a689f
AW		 2347 md->force_ro.attr.name = "force_ro";
2348 md->force_ro.attr.mode = S_IRUGO | S_IWUSR;
2349 ret = device_create_file(disk_to_dev(md->disk), &md->force_ro);
2350 if (ret)
add710ea
JR		 2351 goto force_ro_fail;
2352
2353 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2354 card->ext_csd.boot_ro_lockable) {
88187398 2355 umode_t mode;
add710ea
JR		 2356
2357 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS)
2358 mode = S_IRUGO;
2359 else
2360 mode = S_IRUGO | S_IWUSR;
2361
2362 md->power_ro_lock.show = power_ro_lock_show;
2363 md->power_ro_lock.store = power_ro_lock_store;
00d9ac08 2364 sysfs_attr_init(&md->power_ro_lock.attr);
add710ea
JR		 2365 md->power_ro_lock.attr.mode = mode;
2366 md->power_ro_lock.attr.name =
2367 "ro_lock_until_next_power_on";
2368 ret = device_create_file(disk_to_dev(md->disk),
2369 &md->power_ro_lock);
2370 if (ret)
2371 goto power_ro_lock_fail;
2372 }
2373 return ret;
2374
2375power_ro_lock_fail:
2376 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2377force_ro_fail:
2378 del_gendisk(md->disk);
371a689f
AW		 2379
2380 return ret;
2381}
2382
c59d4473
CB		 2383#define CID_MANFID_SANDISK 0x2
2384#define CID_MANFID_TOSHIBA 0x11
2385#define CID_MANFID_MICRON 0x13
3550ccdb 2386#define CID_MANFID_SAMSUNG 0x15
c59d4473 2387
6f60c222
AW		 2388static const struct mmc_fixup blk_fixups[] =
2389{
c59d4473
CB		 2390 MMC_FIXUP("SEM02G", CID_MANFID_SANDISK, 0x100, add_quirk,
2391 MMC_QUIRK_INAND_CMD38),
2392 MMC_FIXUP("SEM04G", CID_MANFID_SANDISK, 0x100, add_quirk,
2393 MMC_QUIRK_INAND_CMD38),
2394 MMC_FIXUP("SEM08G", CID_MANFID_SANDISK, 0x100, add_quirk,
2395 MMC_QUIRK_INAND_CMD38),
2396 MMC_FIXUP("SEM16G", CID_MANFID_SANDISK, 0x100, add_quirk,
2397 MMC_QUIRK_INAND_CMD38),
2398 MMC_FIXUP("SEM32G", CID_MANFID_SANDISK, 0x100, add_quirk,
2399 MMC_QUIRK_INAND_CMD38),
d0c97cfb
AW		 2400
2401 /*
2402 * Some MMC cards experience performance degradation with CMD23
2403 * instead of CMD12-bounded multiblock transfers. For now we'll
2404 * black list what's bad...
2405 * - Certain Toshiba cards.
2406 *
2407 * N.B. This doesn't affect SD cards.
2408 */
c59d4473 2409 MMC_FIXUP("MMC08G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
d0c97cfb 2410 MMC_QUIRK_BLK_NO_CMD23),
c59d4473 2411 MMC_FIXUP("MMC16G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
d0c97cfb 2412 MMC_QUIRK_BLK_NO_CMD23),
c59d4473 2413 MMC_FIXUP("MMC32G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
d0c97cfb 2414 MMC_QUIRK_BLK_NO_CMD23),
6de5fc9c
SNX		 2415
2416 /*
2417 * Some Micron MMC cards needs longer data read timeout than
2418 * indicated in CSD.
2419 */
c59d4473 2420 MMC_FIXUP(CID_NAME_ANY, CID_MANFID_MICRON, 0x200, add_quirk_mmc,
6de5fc9c
SNX		 2421 MMC_QUIRK_LONG_READ_TIME),
2422
3550ccdb
IC		 2423 /*
2424 * On these Samsung MoviNAND parts, performing secure erase or
2425 * secure trim can result in unrecoverable corruption due to a
2426 * firmware bug.
2427 */
2428 MMC_FIXUP("M8G2FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2429 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2430 MMC_FIXUP("MAG4FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2431 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2432 MMC_FIXUP("MBG8FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2433 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2434 MMC_FIXUP("MCGAFA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2435 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2436 MMC_FIXUP("VAL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2437 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2438 MMC_FIXUP("VYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2439 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2440 MMC_FIXUP("KYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2441 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2442 MMC_FIXUP("VZL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2443 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2444
6f60c222
AW		 2445 END_FIXUP
2446};
2447
96541bac 2448static int mmc_blk_probe(struct mmc_card *card)
1da177e4 2449{
371a689f 2450 struct mmc_blk_data *md, *part_md;
a7bbb573
PO		 2451 char cap_str[10];
2452
912490db
PO		 2453 /*
2454 * Check that the card supports the command class(es) we need.
2455 */
2456 if (!(card->csd.cmdclass & CCC_BLOCK_READ))
1da177e4
LT		 2457 return -ENODEV;
2458
5204d00f
LC		 2459 mmc_fixup_device(card, blk_fixups);
2460
1da177e4
LT		 2461 md = mmc_blk_alloc(card);
2462 if (IS_ERR(md))
2463 return PTR_ERR(md);
2464
b9f28d86 2465 string_get_size((u64)get_capacity(md->disk), 512, STRING_UNITS_2,
a7bbb573 2466 cap_str, sizeof(cap_str));
a3c76eb9 2467 pr_info("%s: %s %s %s %s\n",
1da177e4 2468 md->disk->disk_name, mmc_card_id(card), mmc_card_name(card),
a7bbb573 2469 cap_str, md->read_only ? "(ro)" : "");
1da177e4 2470
371a689f
AW		 2471 if (mmc_blk_alloc_parts(card, md))
2472 goto out;
2473
96541bac 2474 dev_set_drvdata(&card->dev, md);
6f60c222 2475
371a689f
AW		 2476 if (mmc_add_disk(md))
2477 goto out;
2478
2479 list_for_each_entry(part_md, &md->part, part) {
2480 if (mmc_add_disk(part_md))
2481 goto out;
2482 }
e94cfef6
UH		 2483
2484 pm_runtime_set_autosuspend_delay(&card->dev, 3000);
2485 pm_runtime_use_autosuspend(&card->dev);
2486
2487 /*
2488 * Don't enable runtime PM for SD-combo cards here. Leave that
2489 * decision to be taken during the SDIO init sequence instead.
2490 */
2491 if (card->type != MMC_TYPE_SD_COMBO) {
2492 pm_runtime_set_active(&card->dev);
2493 pm_runtime_enable(&card->dev);
2494 }
2495
1da177e4
LT		 2496 return 0;
2497
2498 out:
371a689f
AW		 2499 mmc_blk_remove_parts(card, md);
2500 mmc_blk_remove_req(md);
5865f287 2501 return 0;
1da177e4
LT		 2502}
2503
96541bac 2504static void mmc_blk_remove(struct mmc_card *card)
1da177e4 2505{
96541bac 2506 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
1da177e4 2507
371a689f 2508 mmc_blk_remove_parts(card, md);
e94cfef6 2509 pm_runtime_get_sync(&card->dev);
ddd6fa7e
AH		 2510 mmc_claim_host(card->host);
2511 mmc_blk_part_switch(card, md);
2512 mmc_release_host(card->host);
e94cfef6
UH		 2513 if (card->type != MMC_TYPE_SD_COMBO)
2514 pm_runtime_disable(&card->dev);
2515 pm_runtime_put_noidle(&card->dev);
371a689f 2516 mmc_blk_remove_req(md);
96541bac 2517 dev_set_drvdata(&card->dev, NULL);
1da177e4
LT		 2518}
2519
96541bac 2520static int _mmc_blk_suspend(struct mmc_card *card)
1da177e4 2521{
371a689f 2522 struct mmc_blk_data *part_md;
96541bac 2523 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
1da177e4
LT		 2524
2525 if (md) {
2526 mmc_queue_suspend(&md->queue);
371a689f
AW		 2527 list_for_each_entry(part_md, &md->part, part) {
2528 mmc_queue_suspend(&part_md->queue);
2529 }
1da177e4
LT		 2530 }
2531 return 0;
2532}
2533
96541bac 2534static void mmc_blk_shutdown(struct mmc_card *card)
76287748 2535{
96541bac 2536 _mmc_blk_suspend(card);
76287748
UH		 2537}
2538
0967edc6
UH		 2539#ifdef CONFIG_PM_SLEEP
2540static int mmc_blk_suspend(struct device *dev)
76287748 2541{
96541bac
UH		 2542 struct mmc_card *card = mmc_dev_to_card(dev);
2543
2544 return _mmc_blk_suspend(card);
76287748
UH		 2545}
2546
0967edc6 2547static int mmc_blk_resume(struct device *dev)
1da177e4 2548{
371a689f 2549 struct mmc_blk_data *part_md;
fc95e30b 2550 struct mmc_blk_data *md = dev_get_drvdata(dev);
1da177e4
LT		 2551
2552 if (md) {
371a689f
AW		 2553 /*
2554 * Resume involves the card going into idle state,
2555 * so current partition is always the main one.
2556 */
2557 md->part_curr = md->part_type;
1da177e4 2558 mmc_queue_resume(&md->queue);
371a689f
AW		 2559 list_for_each_entry(part_md, &md->part, part) {
2560 mmc_queue_resume(&part_md->queue);
2561 }
1da177e4
LT		 2562 }
2563 return 0;
2564}
1da177e4
LT		 2565#endif
2566
0967edc6
UH		 2567static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops, mmc_blk_suspend, mmc_blk_resume);
2568
96541bac
UH		 2569static struct mmc_driver mmc_driver = {
2570 .drv = {
2571 .name = "mmcblk",
2572 .pm = &mmc_blk_pm_ops,
2573 },
1da177e4
LT		 2574 .probe = mmc_blk_probe,
2575 .remove = mmc_blk_remove,
76287748 2576 .shutdown = mmc_blk_shutdown,
1da177e4
LT		 2577};
2578
2579static int __init mmc_blk_init(void)
2580{
9d4e98e9 2581 int res;
1da177e4 2582
5e71b7a6
OJ		 2583 if (perdev_minors != CONFIG_MMC_BLOCK_MINORS)
2584 pr_info("mmcblk: using %d minors per device\n", perdev_minors);
2585
a26eba61 2586 max_devices = min(MAX_DEVICES, (1 << MINORBITS) / perdev_minors);
5e71b7a6 2587
fe6b4c88
PO		 2588 res = register_blkdev(MMC_BLOCK_MAJOR, "mmc");
2589 if (res)
1da177e4 2590 goto out;
1da177e4 2591
9d4e98e9
AM		 2592 res = mmc_register_driver(&mmc_driver);
2593 if (res)
2594 goto out2;
1da177e4 2595
9d4e98e9
AM		 2596 return 0;
2597 out2:
2598 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
1da177e4
LT		 2599 out:
2600 return res;
2601}
2602
2603static void __exit mmc_blk_exit(void)
2604{
2605 mmc_unregister_driver(&mmc_driver);
fe6b4c88 2606 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
1da177e4
LT		 2607}
2608
2609module_init(mmc_blk_init);
2610module_exit(mmc_blk_exit);
2611
2612MODULE_LICENSE("GPL");
2613MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver");
2614
Linux 6.x block layer and io_uring tree(s)