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mmc: block: convert ecc_err to a bool
[mirror_ubuntu-artful-kernel.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>
b10fa99e 38#include <linux/idr.h>
1da177e4 39
cb87ea28 40#include <linux/mmc/ioctl.h>
1da177e4 41#include <linux/mmc/card.h>
385e3227 42#include <linux/mmc/host.h>
da7fbe58
PO		 43#include <linux/mmc/mmc.h>
44#include <linux/mmc/sd.h>
1da177e4 45
1da177e4
LT		 46#include <asm/uaccess.h>
47
98ac2162 48#include "queue.h"
48ab086d 49#include "block.h"
1da177e4 50
6b0b6285 51MODULE_ALIAS("mmc:block");
5e71b7a6
OJ		 52#ifdef MODULE_PARAM_PREFIX
53#undef MODULE_PARAM_PREFIX
54#endif
55#define MODULE_PARAM_PREFIX "mmcblk."
56
6a7a6b45
AW		 57#define INAND_CMD38_ARG_EXT_CSD 113
58#define INAND_CMD38_ARG_ERASE 0x00
59#define INAND_CMD38_ARG_TRIM 0x01
60#define INAND_CMD38_ARG_SECERASE 0x80
61#define INAND_CMD38_ARG_SECTRIM1 0x81
62#define INAND_CMD38_ARG_SECTRIM2 0x88
8fee476b 63#define MMC_BLK_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */
775a9362
ME		 64#define MMC_SANITIZE_REQ_TIMEOUT 240000
65#define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16)
6a7a6b45 66
d3df0465 67#define mmc_req_rel_wr(req) ((req->cmd_flags & REQ_FUA) && \
ce39f9d1
SJ		 68 (rq_data_dir(req) == WRITE))
69#define PACKED_CMD_VER 0x01
70#define PACKED_CMD_WR 0x02
71
5e71b7a6 72static DEFINE_MUTEX(block_mutex);
6b0b6285 73
1da177e4 74/*
5e71b7a6
OJ		 75 * The defaults come from config options but can be overriden by module
76 * or bootarg options.
1da177e4 77 */
5e71b7a6 78static int perdev_minors = CONFIG_MMC_BLOCK_MINORS;
1dff3144 79
5e71b7a6
OJ		 80/*
81 * We've only got one major, so number of mmcblk devices is
a26eba61 82 * limited to (1 << 20) / number of minors per device. It is also
b10fa99e 83 * limited by the MAX_DEVICES below.
5e71b7a6
OJ		 84 */
85static int max_devices;
86
a26eba61
BH		 87#define MAX_DEVICES 256
88
b10fa99e
UH		 89static DEFINE_IDA(mmc_blk_ida);
90static DEFINE_SPINLOCK(mmc_blk_lock);
1da177e4 91
1da177e4
LT		 92/*
93 * There is one mmc_blk_data per slot.
94 */
95struct mmc_blk_data {
96 spinlock_t lock;
307d8e6f 97 struct device *parent;
1da177e4
LT		 98 struct gendisk *disk;
99 struct mmc_queue queue;
371a689f 100 struct list_head part;
1da177e4 101
d0c97cfb
AW		 102 unsigned int flags;
103#define MMC_BLK_CMD23 (1 << 0) /* Can do SET_BLOCK_COUNT for multiblock */
104#define MMC_BLK_REL_WR (1 << 1) /* MMC Reliable write support */
ce39f9d1 105#define MMC_BLK_PACKED_CMD (1 << 2) /* MMC packed command support */
d0c97cfb 106
1da177e4 107 unsigned int usage;
a6f6c96b 108 unsigned int read_only;
371a689f 109 unsigned int part_type;
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
ce39f9d1
SJ		 146 mqrq->cmd_type = MMC_PACKED_NONE;
147 packed->nr_entries = MMC_PACKED_NR_ZERO;
148 packed->idx_failure = MMC_PACKED_NR_IDX;
149 packed->retries = 0;
150 packed->blocks = 0;
151}
152
1da177e4
LT		 153static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk)
154{
155 struct mmc_blk_data *md;
156
a621aaed 157 mutex_lock(&open_lock);
1da177e4
LT		 158 md = disk->private_data;
159 if (md && md->usage == 0)
160 md = NULL;
161 if (md)
162 md->usage++;
a621aaed 163 mutex_unlock(&open_lock);
1da177e4
LT		 164
165 return md;
166}
167
371a689f
AW		 168static inline int mmc_get_devidx(struct gendisk *disk)
169{
382c55f8 170 int devidx = disk->first_minor / perdev_minors;
371a689f
AW		 171 return devidx;
172}
173
1da177e4
LT		 174static void mmc_blk_put(struct mmc_blk_data *md)
175{
a621aaed 176 mutex_lock(&open_lock);
1da177e4
LT		 177 md->usage--;
178 if (md->usage == 0) {
371a689f 179 int devidx = mmc_get_devidx(md->disk);
5fa83ce2
AH		 180 blk_cleanup_queue(md->queue.queue);
181
b10fa99e
UH		 182 spin_lock(&mmc_blk_lock);
183 ida_remove(&mmc_blk_ida, devidx);
184 spin_unlock(&mmc_blk_lock);
1dff3144 185
1da177e4 186 put_disk(md->disk);
1da177e4
LT		 187 kfree(md);
188 }
a621aaed 189 mutex_unlock(&open_lock);
1da177e4
LT		 190}
191
add710ea
JR		 192static ssize_t power_ro_lock_show(struct device *dev,
193 struct device_attribute *attr, char *buf)
194{
195 int ret;
196 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
197 struct mmc_card *card = md->queue.card;
198 int locked = 0;
199
200 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PERM_WP_EN)
201 locked = 2;
202 else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN)
203 locked = 1;
204
205 ret = snprintf(buf, PAGE_SIZE, "%d\n", locked);
206
9098f84c
TW		 207 mmc_blk_put(md);
208
add710ea
JR		 209 return ret;
210}
211
212static ssize_t power_ro_lock_store(struct device *dev,
213 struct device_attribute *attr, const char *buf, size_t count)
214{
215 int ret;
216 struct mmc_blk_data *md, *part_md;
217 struct mmc_card *card;
218 unsigned long set;
219
220 if (kstrtoul(buf, 0, &set))
221 return -EINVAL;
222
223 if (set != 1)
224 return count;
225
226 md = mmc_blk_get(dev_to_disk(dev));
227 card = md->queue.card;
228
e94cfef6 229 mmc_get_card(card);
add710ea
JR		 230
231 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP,
232 card->ext_csd.boot_ro_lock |
233 EXT_CSD_BOOT_WP_B_PWR_WP_EN,
234 card->ext_csd.part_time);
235 if (ret)
236 pr_err("%s: Locking boot partition ro until next power on failed: %d\n", md->disk->disk_name, ret);
237 else
238 card->ext_csd.boot_ro_lock |= EXT_CSD_BOOT_WP_B_PWR_WP_EN;
239
e94cfef6 240 mmc_put_card(card);
add710ea
JR		 241
242 if (!ret) {
243 pr_info("%s: Locking boot partition ro until next power on\n",
244 md->disk->disk_name);
245 set_disk_ro(md->disk, 1);
246
247 list_for_each_entry(part_md, &md->part, part)
248 if (part_md->area_type == MMC_BLK_DATA_AREA_BOOT) {
249 pr_info("%s: Locking boot partition ro until next power on\n", part_md->disk->disk_name);
250 set_disk_ro(part_md->disk, 1);
251 }
252 }
253
254 mmc_blk_put(md);
255 return count;
256}
257
371a689f
AW		 258static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr,
259 char *buf)
260{
261 int ret;
262 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
263
0031a98a 264 ret = snprintf(buf, PAGE_SIZE, "%d\n",
371a689f
AW		 265 get_disk_ro(dev_to_disk(dev)) ^
266 md->read_only);
267 mmc_blk_put(md);
268 return ret;
269}
270
271static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr,
272 const char *buf, size_t count)
273{
274 int ret;
275 char *end;
276 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
277 unsigned long set = simple_strtoul(buf, &end, 0);
278 if (end == buf) {
279 ret = -EINVAL;
280 goto out;
281 }
282
283 set_disk_ro(dev_to_disk(dev), set || md->read_only);
284 ret = count;
285out:
286 mmc_blk_put(md);
287 return ret;
288}
289
a5a1561f 290static int mmc_blk_open(struct block_device *bdev, fmode_t mode)
1da177e4 291{
a5a1561f 292 struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk);
1da177e4
LT		 293 int ret = -ENXIO;
294
2a48fc0a 295 mutex_lock(&block_mutex);
1da177e4
LT		 296 if (md) {
297 if (md->usage == 2)
a5a1561f 298 check_disk_change(bdev);
1da177e4 299 ret = 0;
a00fc090 300
a5a1561f 301 if ((mode & FMODE_WRITE) && md->read_only) {
70bb0896 302 mmc_blk_put(md);
a00fc090 303 ret = -EROFS;
70bb0896 304 }
1da177e4 305 }
2a48fc0a 306 mutex_unlock(&block_mutex);
1da177e4
LT		 307
308 return ret;
309}
310
db2a144b 311static void mmc_blk_release(struct gendisk *disk, fmode_t mode)
1da177e4 312{
a5a1561f 313 struct mmc_blk_data *md = disk->private_data;
1da177e4 314
2a48fc0a 315 mutex_lock(&block_mutex);
1da177e4 316 mmc_blk_put(md);
2a48fc0a 317 mutex_unlock(&block_mutex);
1da177e4
LT		 318}
319
320static int
a885c8c4 321mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1da177e4 322{
a885c8c4
CH		 323 geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16);
324 geo->heads = 4;
325 geo->sectors = 16;
326 return 0;
1da177e4
LT		 327}
328
cb87ea28
JC		 329struct mmc_blk_ioc_data {
330 struct mmc_ioc_cmd ic;
331 unsigned char *buf;
332 u64 buf_bytes;
333};
334
335static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user(
336 struct mmc_ioc_cmd __user *user)
337{
338 struct mmc_blk_ioc_data *idata;
339 int err;
340
1ff8950c 341 idata = kmalloc(sizeof(*idata), GFP_KERNEL);
cb87ea28
JC		 342 if (!idata) {
343 err = -ENOMEM;
aea253ec 344 goto out;
cb87ea28
JC		 345 }
346
347 if (copy_from_user(&idata->ic, user, sizeof(idata->ic))) {
348 err = -EFAULT;
aea253ec 349 goto idata_err;
cb87ea28
JC		 350 }
351
352 idata->buf_bytes = (u64) idata->ic.blksz * idata->ic.blocks;
353 if (idata->buf_bytes > MMC_IOC_MAX_BYTES) {
354 err = -EOVERFLOW;
aea253ec 355 goto idata_err;
cb87ea28
JC		 356 }
357
bfe5b1b1
VV		 358 if (!idata->buf_bytes) {
359 idata->buf = NULL;
4d6144de 360 return idata;
bfe5b1b1 361 }
4d6144de 362
1ff8950c 363 idata->buf = kmalloc(idata->buf_bytes, GFP_KERNEL);
cb87ea28
JC		 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
a5f5774c
JH		 385static int mmc_blk_ioctl_copy_to_user(struct mmc_ioc_cmd __user *ic_ptr,
386 struct mmc_blk_ioc_data *idata)
387{
388 struct mmc_ioc_cmd *ic = &idata->ic;
389
390 if (copy_to_user(&(ic_ptr->response), ic->response,
391 sizeof(ic->response)))
392 return -EFAULT;
393
394 if (!idata->ic.write_flag) {
395 if (copy_to_user((void __user *)(unsigned long)ic->data_ptr,
396 idata->buf, idata->buf_bytes))
397 return -EFAULT;
398 }
399
400 return 0;
401}
402
8d1e977d
LP		 403static int ioctl_rpmb_card_status_poll(struct mmc_card *card, u32 *status,
404 u32 retries_max)
405{
406 int err;
407 u32 retry_count = 0;
408
409 if (!status || !retries_max)
410 return -EINVAL;
411
412 do {
413 err = get_card_status(card, status, 5);
414 if (err)
415 break;
416
417 if (!R1_STATUS(*status) &&
418 (R1_CURRENT_STATE(*status) != R1_STATE_PRG))
419 break; /* RPMB programming operation complete */
420
421 /*
422 * Rechedule to give the MMC device a chance to continue
423 * processing the previous command without being polled too
424 * frequently.
425 */
426 usleep_range(1000, 5000);
427 } while (++retry_count < retries_max);
428
429 if (retry_count == retries_max)
430 err = -EPERM;
431
432 return err;
433}
434
775a9362
ME		 435static int ioctl_do_sanitize(struct mmc_card *card)
436{
437 int err;
438
a2d1086d 439 if (!mmc_can_sanitize(card)) {
775a9362
ME		 440 pr_warn("%s: %s - SANITIZE is not supported\n",
441 mmc_hostname(card->host), __func__);
442 err = -EOPNOTSUPP;
443 goto out;
444 }
445
446 pr_debug("%s: %s - SANITIZE IN PROGRESS...\n",
447 mmc_hostname(card->host), __func__);
448
449 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
450 EXT_CSD_SANITIZE_START, 1,
451 MMC_SANITIZE_REQ_TIMEOUT);
452
453 if (err)
454 pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n",
455 mmc_hostname(card->host), __func__, err);
456
457 pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card->host),
458 __func__);
459out:
460 return err;
461}
462
a5f5774c
JH		 463static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md,
464 struct mmc_blk_ioc_data *idata)
cb87ea28 465{
cb87ea28
JC		 466 struct mmc_command cmd = {0};
467 struct mmc_data data = {0};
ad5fd972 468 struct mmc_request mrq = {NULL};
cb87ea28
JC		 469 struct scatterlist sg;
470 int err;
8d1e977d
LP		 471 int is_rpmb = false;
472 u32 status = 0;
cb87ea28 473
a5f5774c
JH		 474 if (!card || !md || !idata)
475 return -EINVAL;
cb87ea28 476
8d1e977d
LP		 477 if (md->area_type & MMC_BLK_DATA_AREA_RPMB)
478 is_rpmb = true;
479
4d6144de
JR		 480 cmd.opcode = idata->ic.opcode;
481 cmd.arg = idata->ic.arg;
482 cmd.flags = idata->ic.flags;
483
484 if (idata->buf_bytes) {
485 data.sg = &sg;
486 data.sg_len = 1;
487 data.blksz = idata->ic.blksz;
488 data.blocks = idata->ic.blocks;
489
490 sg_init_one(data.sg, idata->buf, idata->buf_bytes);
491
492 if (idata->ic.write_flag)
493 data.flags = MMC_DATA_WRITE;
494 else
495 data.flags = MMC_DATA_READ;
496
497 /* data.flags must already be set before doing this. */
498 mmc_set_data_timeout(&data, card);
499
500 /* Allow overriding the timeout_ns for empirical tuning. */
501 if (idata->ic.data_timeout_ns)
502 data.timeout_ns = idata->ic.data_timeout_ns;
503
504 if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
505 /*
506 * Pretend this is a data transfer and rely on the
507 * host driver to compute timeout. When all host
508 * drivers support cmd.cmd_timeout for R1B, this
509 * can be changed to:
510 *
511 * mrq.data = NULL;
512 * cmd.cmd_timeout = idata->ic.cmd_timeout_ms;
513 */
514 data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000;
515 }
516
517 mrq.data = &data;
518 }
519
520 mrq.cmd = &cmd;
521
8d1e977d
LP		 522 err = mmc_blk_part_switch(card, md);
523 if (err)
a5f5774c 524 return err;
8d1e977d 525
cb87ea28
JC		 526 if (idata->ic.is_acmd) {
527 err = mmc_app_cmd(card->host, card);
528 if (err)
a5f5774c 529 return err;
cb87ea28
JC		 530 }
531
8d1e977d
LP		 532 if (is_rpmb) {
533 err = mmc_set_blockcount(card, data.blocks,
534 idata->ic.write_flag & (1 << 31));
535 if (err)
a5f5774c 536 return err;
8d1e977d
LP		 537 }
538
a82e484e
YG		 539 if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) &&
540 (cmd.opcode == MMC_SWITCH)) {
775a9362
ME		 541 err = ioctl_do_sanitize(card);
542
543 if (err)
544 pr_err("%s: ioctl_do_sanitize() failed. err = %d",
545 __func__, err);
546
a5f5774c 547 return err;
775a9362
ME		 548 }
549
cb87ea28
JC		 550 mmc_wait_for_req(card->host, &mrq);
551
552 if (cmd.error) {
553 dev_err(mmc_dev(card->host), "%s: cmd error %d\n",
554 __func__, cmd.error);
a5f5774c 555 return cmd.error;
cb87ea28
JC		 556 }
557 if (data.error) {
558 dev_err(mmc_dev(card->host), "%s: data error %d\n",
559 __func__, data.error);
a5f5774c 560 return data.error;
cb87ea28
JC		 561 }
562
563 /*
564 * According to the SD specs, some commands require a delay after
565 * issuing the command.
566 */
567 if (idata->ic.postsleep_min_us)
568 usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us);
569
a5f5774c 570 memcpy(&(idata->ic.response), cmd.resp, sizeof(cmd.resp));
cb87ea28 571
8d1e977d
LP		 572 if (is_rpmb) {
573 /*
574 * Ensure RPMB command has completed by polling CMD13
575 * "Send Status".
576 */
577 err = ioctl_rpmb_card_status_poll(card, &status, 5);
578 if (err)
579 dev_err(mmc_dev(card->host),
580 "%s: Card Status=0x%08X, error %d\n",
581 __func__, status, err);
582 }
583
a5f5774c
JH		 584 return err;
585}
586
587static int mmc_blk_ioctl_cmd(struct block_device *bdev,
588 struct mmc_ioc_cmd __user *ic_ptr)
589{
590 struct mmc_blk_ioc_data *idata;
591 struct mmc_blk_data *md;
592 struct mmc_card *card;
b093410c 593 int err = 0, ioc_err = 0;
a5f5774c 594
83c742c3
SL		 595 /*
596 * The caller must have CAP_SYS_RAWIO, and must be calling this on the
597 * whole block device, not on a partition. This prevents overspray
598 * between sibling partitions.
599 */
600 if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
601 return -EPERM;
602
a5f5774c
JH		 603 idata = mmc_blk_ioctl_copy_from_user(ic_ptr);
604 if (IS_ERR(idata))
605 return PTR_ERR(idata);
606
607 md = mmc_blk_get(bdev->bd_disk);
608 if (!md) {
609 err = -EINVAL;
610 goto cmd_err;
611 }
612
613 card = md->queue.card;
614 if (IS_ERR(card)) {
615 err = PTR_ERR(card);
616 goto cmd_done;
617 }
618
619 mmc_get_card(card);
620
b093410c 621 ioc_err = __mmc_blk_ioctl_cmd(card, md, idata);
a5f5774c 622
3c866568
AH		 623 /* Always switch back to main area after RPMB access */
624 if (md->area_type & MMC_BLK_DATA_AREA_RPMB)
625 mmc_blk_part_switch(card, dev_get_drvdata(&card->dev));
626
e94cfef6 627 mmc_put_card(card);
cb87ea28 628
b093410c 629 err = mmc_blk_ioctl_copy_to_user(ic_ptr, idata);
a5f5774c 630
cb87ea28
JC		 631cmd_done:
632 mmc_blk_put(md);
1c02f000 633cmd_err:
cb87ea28
JC		 634 kfree(idata->buf);
635 kfree(idata);
b093410c 636 return ioc_err ? ioc_err : err;
cb87ea28
JC		 637}
638
a5f5774c
JH		 639static int mmc_blk_ioctl_multi_cmd(struct block_device *bdev,
640 struct mmc_ioc_multi_cmd __user *user)
641{
642 struct mmc_blk_ioc_data **idata = NULL;
643 struct mmc_ioc_cmd __user *cmds = user->cmds;
644 struct mmc_card *card;
645 struct mmc_blk_data *md;
b093410c 646 int i, err = 0, ioc_err = 0;
a5f5774c
JH		 647 __u64 num_of_cmds;
648
83c742c3
SL		 649 /*
650 * The caller must have CAP_SYS_RAWIO, and must be calling this on the
651 * whole block device, not on a partition. This prevents overspray
652 * between sibling partitions.
653 */
654 if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
655 return -EPERM;
656
a5f5774c
JH		 657 if (copy_from_user(&num_of_cmds, &user->num_of_cmds,
658 sizeof(num_of_cmds)))
659 return -EFAULT;
660
661 if (num_of_cmds > MMC_IOC_MAX_CMDS)
662 return -EINVAL;
663
664 idata = kcalloc(num_of_cmds, sizeof(*idata), GFP_KERNEL);
665 if (!idata)
666 return -ENOMEM;
667
668 for (i = 0; i < num_of_cmds; i++) {
669 idata[i] = mmc_blk_ioctl_copy_from_user(&cmds[i]);
670 if (IS_ERR(idata[i])) {
671 err = PTR_ERR(idata[i]);
672 num_of_cmds = i;
673 goto cmd_err;
674 }
675 }
676
677 md = mmc_blk_get(bdev->bd_disk);
f00ab14c
OJ		 678 if (!md) {
679 err = -EINVAL;
a5f5774c 680 goto cmd_err;
f00ab14c 681 }
a5f5774c
JH		 682
683 card = md->queue.card;
684 if (IS_ERR(card)) {
685 err = PTR_ERR(card);
686 goto cmd_done;
687 }
688
689 mmc_get_card(card);
690
b093410c
GG		 691 for (i = 0; i < num_of_cmds && !ioc_err; i++)
692 ioc_err = __mmc_blk_ioctl_cmd(card, md, idata[i]);
a5f5774c 693
3c866568
AH		 694 /* Always switch back to main area after RPMB access */
695 if (md->area_type & MMC_BLK_DATA_AREA_RPMB)
696 mmc_blk_part_switch(card, dev_get_drvdata(&card->dev));
697
a5f5774c
JH		 698 mmc_put_card(card);
699
700 /* copy to user if data and response */
b093410c 701 for (i = 0; i < num_of_cmds && !err; i++)
a5f5774c 702 err = mmc_blk_ioctl_copy_to_user(&cmds[i], idata[i]);
a5f5774c
JH		 703
704cmd_done:
705 mmc_blk_put(md);
706cmd_err:
707 for (i = 0; i < num_of_cmds; i++) {
708 kfree(idata[i]->buf);
709 kfree(idata[i]);
710 }
711 kfree(idata);
b093410c 712 return ioc_err ? ioc_err : err;
a5f5774c
JH		 713}
714
cb87ea28
JC		 715static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode,
716 unsigned int cmd, unsigned long arg)
717{
a5f5774c
JH		 718 switch (cmd) {
719 case MMC_IOC_CMD:
720 return mmc_blk_ioctl_cmd(bdev,
721 (struct mmc_ioc_cmd __user *)arg);
722 case MMC_IOC_MULTI_CMD:
723 return mmc_blk_ioctl_multi_cmd(bdev,
724 (struct mmc_ioc_multi_cmd __user *)arg);
725 default:
726 return -EINVAL;
727 }
cb87ea28
JC		 728}
729
730#ifdef CONFIG_COMPAT
731static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode,
732 unsigned int cmd, unsigned long arg)
733{
734 return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg));
735}
736#endif
737
83d5cde4 738static const struct block_device_operations mmc_bdops = {
a5a1561f
AV		 739 .open = mmc_blk_open,
740 .release = mmc_blk_release,
a885c8c4 741 .getgeo = mmc_blk_getgeo,
1da177e4 742 .owner = THIS_MODULE,
cb87ea28
JC		 743 .ioctl = mmc_blk_ioctl,
744#ifdef CONFIG_COMPAT
745 .compat_ioctl = mmc_blk_compat_ioctl,
746#endif
1da177e4
LT		 747};
748
371a689f
AW		 749static inline int mmc_blk_part_switch(struct mmc_card *card,
750 struct mmc_blk_data *md)
751{
752 int ret;
fc95e30b 753 struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev);
0d7d85ca 754
371a689f
AW		 755 if (main_md->part_curr == md->part_type)
756 return 0;
757
758 if (mmc_card_mmc(card)) {
0d7d85ca
AH		 759 u8 part_config = card->ext_csd.part_config;
760
57da0c04
AH		 761 if (md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
762 mmc_retune_pause(card->host);
763
0d7d85ca
AH		 764 part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
765 part_config |= md->part_type;
371a689f
AW		 766
767 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
0d7d85ca 768 EXT_CSD_PART_CONFIG, part_config,
371a689f 769 card->ext_csd.part_time);
57da0c04
AH		 770 if (ret) {
771 if (md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
772 mmc_retune_unpause(card->host);
371a689f 773 return ret;
57da0c04 774 }
0d7d85ca
AH		 775
776 card->ext_csd.part_config = part_config;
57da0c04
AH		 777
778 if (main_md->part_curr == EXT_CSD_PART_CONFIG_ACC_RPMB)
779 mmc_retune_unpause(card->host);
67716327 780 }
371a689f
AW		 781
782 main_md->part_curr = md->part_type;
783 return 0;
784}
785
ec5a19dd
PO		 786static u32 mmc_sd_num_wr_blocks(struct mmc_card *card)
787{
788 int err;
051913da
BD		 789 u32 result;
790 __be32 *blocks;
ec5a19dd 791
ad5fd972 792 struct mmc_request mrq = {NULL};
1278dba1 793 struct mmc_command cmd = {0};
a61ad2b4 794 struct mmc_data data = {0};
ec5a19dd
PO		 795
796 struct scatterlist sg;
797
ec5a19dd
PO		 798 cmd.opcode = MMC_APP_CMD;
799 cmd.arg = card->rca << 16;
7213d175 800 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
ec5a19dd
PO		 801
802 err = mmc_wait_for_cmd(card->host, &cmd, 0);
7213d175
DB		 803 if (err)
804 return (u32)-1;
805 if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD))
ec5a19dd
PO		 806 return (u32)-1;
807
808 memset(&cmd, 0, sizeof(struct mmc_command));
809
810 cmd.opcode = SD_APP_SEND_NUM_WR_BLKS;
811 cmd.arg = 0;
7213d175 812 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
ec5a19dd 813
ec5a19dd
PO		 814 data.blksz = 4;
815 data.blocks = 1;
816 data.flags = MMC_DATA_READ;
817 data.sg = &sg;
818 data.sg_len = 1;
d380443c 819 mmc_set_data_timeout(&data, card);
ec5a19dd 820
ec5a19dd
PO		 821 mrq.cmd = &cmd;
822 mrq.data = &data;
823
051913da
BD		 824 blocks = kmalloc(4, GFP_KERNEL);
825 if (!blocks)
826 return (u32)-1;
827
828 sg_init_one(&sg, blocks, 4);
ec5a19dd
PO		 829
830 mmc_wait_for_req(card->host, &mrq);
831
051913da
BD		 832 result = ntohl(*blocks);
833 kfree(blocks);
834
17b0429d 835 if (cmd.error || data.error)
051913da 836 result = (u32)-1;
ec5a19dd 837
051913da 838 return result;
ec5a19dd
PO		 839}
840
0a2d4048 841static int get_card_status(struct mmc_card *card, u32 *status, int retries)
504f191f 842{
1278dba1 843 struct mmc_command cmd = {0};
504f191f
AH		 844 int err;
845
504f191f
AH		 846 cmd.opcode = MMC_SEND_STATUS;
847 if (!mmc_host_is_spi(card->host))
848 cmd.arg = card->rca << 16;
849 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
0a2d4048
RKAL		 850 err = mmc_wait_for_cmd(card->host, &cmd, retries);
851 if (err == 0)
852 *status = cmd.resp[0];
853 return err;
504f191f
AH		 854}
855
c49433fb 856static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms,
c44d6cef 857 bool hw_busy_detect, struct request *req, bool *gen_err)
c49433fb
UH		 858{
859 unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
860 int err = 0;
861 u32 status;
862
863 do {
864 err = get_card_status(card, &status, 5);
865 if (err) {
866 pr_err("%s: error %d requesting status\n",
867 req->rq_disk->disk_name, err);
868 return err;
869 }
870
871 if (status & R1_ERROR) {
872 pr_err("%s: %s: error sending status cmd, status %#x\n",
873 req->rq_disk->disk_name, __func__, status);
c44d6cef 874 *gen_err = true;
c49433fb
UH		 875 }
876
95a91298
UH		 877 /* We may rely on the host hw to handle busy detection.*/
878 if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) &&
879 hw_busy_detect)
880 break;
881
c49433fb
UH		 882 /*
883 * Timeout if the device never becomes ready for data and never
884 * leaves the program state.
885 */
886 if (time_after(jiffies, timeout)) {
887 pr_err("%s: Card stuck in programming state! %s %s\n",
888 mmc_hostname(card->host),
889 req->rq_disk->disk_name, __func__);
890 return -ETIMEDOUT;
891 }
892
893 /*
894 * Some cards mishandle the status bits,
895 * so make sure to check both the busy
896 * indication and the card state.
897 */
898 } while (!(status & R1_READY_FOR_DATA) ||
899 (R1_CURRENT_STATE(status) == R1_STATE_PRG));
900
901 return err;
902}
903
bb5cba40 904static int send_stop(struct mmc_card *card, unsigned int timeout_ms,
c44d6cef 905 struct request *req, bool *gen_err, u32 *stop_status)
bb5cba40
UH		 906{
907 struct mmc_host *host = card->host;
908 struct mmc_command cmd = {0};
909 int err;
910 bool use_r1b_resp = rq_data_dir(req) == WRITE;
911
912 /*
913 * Normally we use R1B responses for WRITE, but in cases where the host
914 * has specified a max_busy_timeout we need to validate it. A failure
915 * means we need to prevent the host from doing hw busy detection, which
916 * is done by converting to a R1 response instead.
917 */
918 if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout))
919 use_r1b_resp = false;
920
921 cmd.opcode = MMC_STOP_TRANSMISSION;
922 if (use_r1b_resp) {
923 cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
924 cmd.busy_timeout = timeout_ms;
925 } else {
926 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
927 }
928
929 err = mmc_wait_for_cmd(host, &cmd, 5);
930 if (err)
931 return err;
932
933 *stop_status = cmd.resp[0];
934
935 /* No need to check card status in case of READ. */
936 if (rq_data_dir(req) == READ)
937 return 0;
938
939 if (!mmc_host_is_spi(host) &&
940 (*stop_status & R1_ERROR)) {
941 pr_err("%s: %s: general error sending stop command, resp %#x\n",
942 req->rq_disk->disk_name, __func__, *stop_status);
c44d6cef 943 *gen_err = true;
bb5cba40
UH		 944 }
945
946 return card_busy_detect(card, timeout_ms, use_r1b_resp, req, gen_err);
947}
948
a8ad82cc 949#define ERR_NOMEDIUM 3
a01f3ccf
RKAL		 950#define ERR_RETRY 2
951#define ERR_ABORT 1
952#define ERR_CONTINUE 0
953
954static int mmc_blk_cmd_error(struct request *req, const char *name, int error,
955 bool status_valid, u32 status)
956{
957 switch (error) {
958 case -EILSEQ:
959 /* response crc error, retry the r/w cmd */
960 pr_err("%s: %s sending %s command, card status %#x\n",
961 req->rq_disk->disk_name, "response CRC error",
962 name, status);
963 return ERR_RETRY;
964
965 case -ETIMEDOUT:
966 pr_err("%s: %s sending %s command, card status %#x\n",
967 req->rq_disk->disk_name, "timed out", name, status);
968
969 /* If the status cmd initially failed, retry the r/w cmd */
cc4d04be
KS		 970 if (!status_valid) {
971 pr_err("%s: status not valid, retrying timeout\n",
972 req->rq_disk->disk_name);
a01f3ccf 973 return ERR_RETRY;
cc4d04be 974 }
a01f3ccf
RKAL		 975
976 /*
977 * If it was a r/w cmd crc error, or illegal command
978 * (eg, issued in wrong state) then retry - we should
979 * have corrected the state problem above.
980 */
cc4d04be
KS		 981 if (status & (R1_COM_CRC_ERROR | R1_ILLEGAL_COMMAND)) {
982 pr_err("%s: command error, retrying timeout\n",
983 req->rq_disk->disk_name);
a01f3ccf 984 return ERR_RETRY;
cc4d04be 985 }
a01f3ccf
RKAL		 986
987 /* Otherwise abort the command */
988 return ERR_ABORT;
989
990 default:
991 /* We don't understand the error code the driver gave us */
992 pr_err("%s: unknown error %d sending read/write command, card status %#x\n",
993 req->rq_disk->disk_name, error, status);
994 return ERR_ABORT;
995 }
996}
997
998/*
999 * Initial r/w and stop cmd error recovery.
1000 * We don't know whether the card received the r/w cmd or not, so try to
1001 * restore things back to a sane state. Essentially, we do this as follows:
1002 * - Obtain card status. If the first attempt to obtain card status fails,
1003 * the status word will reflect the failed status cmd, not the failed
1004 * r/w cmd. If we fail to obtain card status, it suggests we can no
1005 * longer communicate with the card.
1006 * - Check the card state. If the card received the cmd but there was a
1007 * transient problem with the response, it might still be in a data transfer
1008 * mode. Try to send it a stop command. If this fails, we can't recover.
1009 * - If the r/w cmd failed due to a response CRC error, it was probably
1010 * transient, so retry the cmd.
1011 * - If the r/w cmd timed out, but we didn't get the r/w cmd status, retry.
1012 * - If the r/w cmd timed out, and the r/w cmd failed due to CRC error or
1013 * illegal cmd, retry.
1014 * Otherwise we don't understand what happened, so abort.
1015 */
1016static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req,
2cc64587 1017 struct mmc_blk_request *brq, bool *ecc_err, bool *gen_err)
a01f3ccf
RKAL		 1018{
1019 bool prev_cmd_status_valid = true;
1020 u32 status, stop_status = 0;
1021 int err, retry;
1022
a8ad82cc
SRT		 1023 if (mmc_card_removed(card))
1024 return ERR_NOMEDIUM;
1025
a01f3ccf
RKAL		 1026 /*
1027 * Try to get card status which indicates both the card state
1028 * and why there was no response. If the first attempt fails,
1029 * we can't be sure the returned status is for the r/w command.
1030 */
1031 for (retry = 2; retry >= 0; retry--) {
1032 err = get_card_status(card, &status, 0);
1033 if (!err)
1034 break;
1035
6f398ad2
AH		 1036 /* Re-tune if needed */
1037 mmc_retune_recheck(card->host);
1038
a01f3ccf
RKAL		 1039 prev_cmd_status_valid = false;
1040 pr_err("%s: error %d sending status command, %sing\n",
1041 req->rq_disk->disk_name, err, retry ? "retry" : "abort");
1042 }
1043
1044 /* We couldn't get a response from the card. Give up. */
a8ad82cc
SRT		 1045 if (err) {
1046 /* Check if the card is removed */
1047 if (mmc_detect_card_removed(card->host))
1048 return ERR_NOMEDIUM;
a01f3ccf 1049 return ERR_ABORT;
a8ad82cc 1050 }
a01f3ccf 1051
67716327
AH		 1052 /* Flag ECC errors */
1053 if ((status & R1_CARD_ECC_FAILED) ||
1054 (brq->stop.resp[0] & R1_CARD_ECC_FAILED) ||
1055 (brq->cmd.resp[0] & R1_CARD_ECC_FAILED))
2cc64587 1056 *ecc_err = true;
67716327 1057
c8760069
KY		 1058 /* Flag General errors */
1059 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ)
1060 if ((status & R1_ERROR) ||
1061 (brq->stop.resp[0] & R1_ERROR)) {
1062 pr_err("%s: %s: general error sending stop or status command, stop cmd response %#x, card status %#x\n",
1063 req->rq_disk->disk_name, __func__,
1064 brq->stop.resp[0], status);
c44d6cef 1065 *gen_err = true;
c8760069
KY		 1066 }
1067
a01f3ccf
RKAL		 1068 /*
1069 * Check the current card state. If it is in some data transfer
1070 * mode, tell it to stop (and hopefully transition back to TRAN.)
1071 */
1072 if (R1_CURRENT_STATE(status) == R1_STATE_DATA ||
1073 R1_CURRENT_STATE(status) == R1_STATE_RCV) {
bb5cba40
UH		 1074 err = send_stop(card,
1075 DIV_ROUND_UP(brq->data.timeout_ns, 1000000),
1076 req, gen_err, &stop_status);
1077 if (err) {
a01f3ccf
RKAL		 1078 pr_err("%s: error %d sending stop command\n",
1079 req->rq_disk->disk_name, err);
bb5cba40
UH		 1080 /*
1081 * If the stop cmd also timed out, the card is probably
1082 * not present, so abort. Other errors are bad news too.
1083 */
a01f3ccf 1084 return ERR_ABORT;
bb5cba40
UH		 1085 }
1086
67716327 1087 if (stop_status & R1_CARD_ECC_FAILED)
2cc64587 1088 *ecc_err = true;
a01f3ccf
RKAL		 1089 }
1090
1091 /* Check for set block count errors */
1092 if (brq->sbc.error)
1093 return mmc_blk_cmd_error(req, "SET_BLOCK_COUNT", brq->sbc.error,
1094 prev_cmd_status_valid, status);
1095
1096 /* Check for r/w command errors */
1097 if (brq->cmd.error)
1098 return mmc_blk_cmd_error(req, "r/w cmd", brq->cmd.error,
1099 prev_cmd_status_valid, status);
1100
67716327
AH		 1101 /* Data errors */
1102 if (!brq->stop.error)
1103 return ERR_CONTINUE;
1104
a01f3ccf 1105 /* Now for stop errors. These aren't fatal to the transfer. */
5e1344eb 1106 pr_info("%s: error %d sending stop command, original cmd response %#x, card status %#x\n",
a01f3ccf
RKAL		 1107 req->rq_disk->disk_name, brq->stop.error,
1108 brq->cmd.resp[0], status);
1109
1110 /*
1111 * Subsitute in our own stop status as this will give the error
1112 * state which happened during the execution of the r/w command.
1113 */
1114 if (stop_status) {
1115 brq->stop.resp[0] = stop_status;
1116 brq->stop.error = 0;
1117 }
1118 return ERR_CONTINUE;
1119}
1120
67716327
AH		 1121static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host,
1122 int type)
1123{
1124 int err;
1125
1126 if (md->reset_done & type)
1127 return -EEXIST;
1128
1129 md->reset_done |= type;
1130 err = mmc_hw_reset(host);
1131 /* Ensure we switch back to the correct partition */
1132 if (err != -EOPNOTSUPP) {
fc95e30b
UH		 1133 struct mmc_blk_data *main_md =
1134 dev_get_drvdata(&host->card->dev);
67716327
AH		 1135 int part_err;
1136
1137 main_md->part_curr = main_md->part_type;
1138 part_err = mmc_blk_part_switch(host->card, md);
1139 if (part_err) {
1140 /*
1141 * We have failed to get back into the correct
1142 * partition, so we need to abort the whole request.
1143 */
1144 return -ENODEV;
1145 }
1146 }
1147 return err;
1148}
1149
1150static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type)
1151{
1152 md->reset_done &= ~type;
1153}
1154
4e93b9a6
CD		 1155int mmc_access_rpmb(struct mmc_queue *mq)
1156{
1157 struct mmc_blk_data *md = mq->data;
1158 /*
1159 * If this is a RPMB partition access, return ture
1160 */
1161 if (md && md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
1162 return true;
1163
1164 return false;
1165}
1166
bd788c96
AH		 1167static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
1168{
1169 struct mmc_blk_data *md = mq->data;
1170 struct mmc_card *card = md->queue.card;
1171 unsigned int from, nr, arg;
67716327 1172 int err = 0, type = MMC_BLK_DISCARD;
bd788c96 1173
bd788c96
AH		 1174 if (!mmc_can_erase(card)) {
1175 err = -EOPNOTSUPP;
1176 goto out;
1177 }
1178
1179 from = blk_rq_pos(req);
1180 nr = blk_rq_sectors(req);
1181
b3bf9153
KP		 1182 if (mmc_can_discard(card))
1183 arg = MMC_DISCARD_ARG;
1184 else if (mmc_can_trim(card))
bd788c96
AH		 1185 arg = MMC_TRIM_ARG;
1186 else
1187 arg = MMC_ERASE_ARG;
67716327 1188retry:
6a7a6b45
AW		 1189 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1190 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1191 INAND_CMD38_ARG_EXT_CSD,
1192 arg == MMC_TRIM_ARG ?
1193 INAND_CMD38_ARG_TRIM :
1194 INAND_CMD38_ARG_ERASE,
1195 0);
1196 if (err)
1197 goto out;
1198 }
bd788c96
AH		 1199 err = mmc_erase(card, from, nr, arg);
1200out:
67716327
AH		 1201 if (err == -EIO && !mmc_blk_reset(md, card->host, type))
1202 goto retry;
1203 if (!err)
1204 mmc_blk_reset_success(md, type);
ecf8b5d0 1205 blk_end_request(req, err, blk_rq_bytes(req));
bd788c96 1206
bd788c96
AH		 1207 return err ? 0 : 1;
1208}
1209
49804548
AH		 1210static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
1211 struct request *req)
1212{
1213 struct mmc_blk_data *md = mq->data;
1214 struct mmc_card *card = md->queue.card;
775a9362 1215 unsigned int from, nr, arg;
67716327 1216 int err = 0, type = MMC_BLK_SECDISCARD;
49804548 1217
775a9362 1218 if (!(mmc_can_secure_erase_trim(card))) {
49804548
AH		 1219 err = -EOPNOTSUPP;
1220 goto out;
1221 }
1222
28302812
AH		 1223 from = blk_rq_pos(req);
1224 nr = blk_rq_sectors(req);
1225
775a9362
ME		 1226 if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr))
1227 arg = MMC_SECURE_TRIM1_ARG;
1228 else
1229 arg = MMC_SECURE_ERASE_ARG;
d9ddd629 1230
67716327 1231retry:
6a7a6b45
AW		 1232 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1233 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1234 INAND_CMD38_ARG_EXT_CSD,
1235 arg == MMC_SECURE_TRIM1_ARG ?
1236 INAND_CMD38_ARG_SECTRIM1 :
1237 INAND_CMD38_ARG_SECERASE,
1238 0);
1239 if (err)
28302812 1240 goto out_retry;
6a7a6b45 1241 }
28302812 1242
49804548 1243 err = mmc_erase(card, from, nr, arg);
28302812
AH		 1244 if (err == -EIO)
1245 goto out_retry;
1246 if (err)
1247 goto out;
1248
1249 if (arg == MMC_SECURE_TRIM1_ARG) {
6a7a6b45
AW		 1250 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1251 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1252 INAND_CMD38_ARG_EXT_CSD,
1253 INAND_CMD38_ARG_SECTRIM2,
1254 0);
1255 if (err)
28302812 1256 goto out_retry;
6a7a6b45 1257 }
28302812 1258
49804548 1259 err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG);
28302812
AH		 1260 if (err == -EIO)
1261 goto out_retry;
1262 if (err)
1263 goto out;
6a7a6b45 1264 }
28302812 1265
28302812
AH		 1266out_retry:
1267 if (err && !mmc_blk_reset(md, card->host, type))
67716327
AH		 1268 goto retry;
1269 if (!err)
1270 mmc_blk_reset_success(md, type);
28302812 1271out:
ecf8b5d0 1272 blk_end_request(req, err, blk_rq_bytes(req));
49804548 1273
49804548
AH		 1274 return err ? 0 : 1;
1275}
1276
f4c5522b
AW		 1277static int mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req)
1278{
1279 struct mmc_blk_data *md = mq->data;
881d1c25
SJ		 1280 struct mmc_card *card = md->queue.card;
1281 int ret = 0;
1282
1283 ret = mmc_flush_cache(card);
1284 if (ret)
1285 ret = -EIO;
f4c5522b 1286
ecf8b5d0 1287 blk_end_request_all(req, ret);
f4c5522b 1288
881d1c25 1289 return ret ? 0 : 1;
f4c5522b
AW		 1290}
1291
1292/*
1293 * Reformat current write as a reliable write, supporting
1294 * both legacy and the enhanced reliable write MMC cards.
1295 * In each transfer we'll handle only as much as a single
1296 * reliable write can handle, thus finish the request in
1297 * partial completions.
1298 */
d0c97cfb
AW		 1299static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq,
1300 struct mmc_card *card,
1301 struct request *req)
f4c5522b 1302{
f4c5522b
AW		 1303 if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) {
1304 /* Legacy mode imposes restrictions on transfers. */
1305 if (!IS_ALIGNED(brq->cmd.arg, card->ext_csd.rel_sectors))
1306 brq->data.blocks = 1;
1307
1308 if (brq->data.blocks > card->ext_csd.rel_sectors)
1309 brq->data.blocks = card->ext_csd.rel_sectors;
1310 else if (brq->data.blocks < card->ext_csd.rel_sectors)
1311 brq->data.blocks = 1;
1312 }
f4c5522b
AW		 1313}
1314
4c2b8f26
RKAL		 1315#define CMD_ERRORS \
1316 (R1_OUT_OF_RANGE | /* Command argument out of range */ \
1317 R1_ADDRESS_ERROR | /* Misaligned address */ \
1318 R1_BLOCK_LEN_ERROR | /* Transferred block length incorrect */\
1319 R1_WP_VIOLATION | /* Tried to write to protected block */ \
1320 R1_CC_ERROR | /* Card controller error */ \
1321 R1_ERROR) /* General/unknown error */
1322
ee8a43a5
PF		 1323static int mmc_blk_err_check(struct mmc_card *card,
1324 struct mmc_async_req *areq)
d78d4a8a 1325{
ee8a43a5
PF		 1326 struct mmc_queue_req *mq_mrq = container_of(areq, struct mmc_queue_req,
1327 mmc_active);
1328 struct mmc_blk_request *brq = &mq_mrq->brq;
1329 struct request *req = mq_mrq->req;
b8360a49 1330 int need_retune = card->host->need_retune;
2cc64587 1331 bool ecc_err = false;
c44d6cef 1332 bool gen_err = false;
d78d4a8a
PF		 1333
1334 /*
1335 * sbc.error indicates a problem with the set block count
1336 * command. No data will have been transferred.
1337 *
1338 * cmd.error indicates a problem with the r/w command. No
1339 * data will have been transferred.
1340 *
1341 * stop.error indicates a problem with the stop command. Data
1342 * may have been transferred, or may still be transferring.
1343 */
67716327
AH		 1344 if (brq->sbc.error || brq->cmd.error || brq->stop.error ||
1345 brq->data.error) {
c8760069 1346 switch (mmc_blk_cmd_recovery(card, req, brq, &ecc_err, &gen_err)) {
d78d4a8a
PF		 1347 case ERR_RETRY:
1348 return MMC_BLK_RETRY;
1349 case ERR_ABORT:
1350 return MMC_BLK_ABORT;
a8ad82cc
SRT		 1351 case ERR_NOMEDIUM:
1352 return MMC_BLK_NOMEDIUM;
d78d4a8a
PF		 1353 case ERR_CONTINUE:
1354 break;
1355 }
1356 }
1357
1358 /*
1359 * Check for errors relating to the execution of the
1360 * initial command - such as address errors. No data
1361 * has been transferred.
1362 */
1363 if (brq->cmd.resp[0] & CMD_ERRORS) {
1364 pr_err("%s: r/w command failed, status = %#x\n",
1365 req->rq_disk->disk_name, brq->cmd.resp[0]);
1366 return MMC_BLK_ABORT;
1367 }
1368
1369 /*
1370 * Everything else is either success, or a data error of some
1371 * kind. If it was a write, we may have transitioned to
1372 * program mode, which we have to wait for it to complete.
1373 */
1374 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) {
c49433fb 1375 int err;
8fee476b 1376
c8760069
KY		 1377 /* Check stop command response */
1378 if (brq->stop.resp[0] & R1_ERROR) {
1379 pr_err("%s: %s: general error sending stop command, stop cmd response %#x\n",
1380 req->rq_disk->disk_name, __func__,
1381 brq->stop.resp[0]);
c44d6cef 1382 gen_err = true;
c8760069
KY		 1383 }
1384
95a91298
UH		 1385 err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, false, req,
1386 &gen_err);
c49433fb
UH		 1387 if (err)
1388 return MMC_BLK_CMD_ERR;
d78d4a8a
PF		 1389 }
1390
c8760069
KY		 1391 /* if general error occurs, retry the write operation. */
1392 if (gen_err) {
1393 pr_warn("%s: retrying write for general error\n",
1394 req->rq_disk->disk_name);
1395 return MMC_BLK_RETRY;
1396 }
1397
d78d4a8a 1398 if (brq->data.error) {
b8360a49 1399 if (need_retune && !brq->retune_retry_done) {
09faf61d
RK		 1400 pr_debug("%s: retrying because a re-tune was needed\n",
1401 req->rq_disk->disk_name);
b8360a49
AH		 1402 brq->retune_retry_done = 1;
1403 return MMC_BLK_RETRY;
1404 }
d78d4a8a
PF		 1405 pr_err("%s: error %d transferring data, sector %u, nr %u, cmd response %#x, card status %#x\n",
1406 req->rq_disk->disk_name, brq->data.error,
1407 (unsigned)blk_rq_pos(req),
1408 (unsigned)blk_rq_sectors(req),
1409 brq->cmd.resp[0], brq->stop.resp[0]);
1410
1411 if (rq_data_dir(req) == READ) {
67716327
AH		 1412 if (ecc_err)
1413 return MMC_BLK_ECC_ERR;
d78d4a8a
PF		 1414 return MMC_BLK_DATA_ERR;
1415 } else {
1416 return MMC_BLK_CMD_ERR;
1417 }
1418 }
1419
67716327
AH		 1420 if (!brq->data.bytes_xfered)
1421 return MMC_BLK_RETRY;
d78d4a8a 1422
ce39f9d1
SJ		 1423 if (mmc_packed_cmd(mq_mrq->cmd_type)) {
1424 if (unlikely(brq->data.blocks << 9 != brq->data.bytes_xfered))
1425 return MMC_BLK_PARTIAL;
1426 else
1427 return MMC_BLK_SUCCESS;
1428 }
1429
67716327
AH		 1430 if (blk_rq_bytes(req) != brq->data.bytes_xfered)
1431 return MMC_BLK_PARTIAL;
1432
1433 return MMC_BLK_SUCCESS;
d78d4a8a
PF		 1434}
1435
ce39f9d1
SJ		 1436static int mmc_blk_packed_err_check(struct mmc_card *card,
1437 struct mmc_async_req *areq)
1438{
1439 struct mmc_queue_req *mq_rq = container_of(areq, struct mmc_queue_req,
1440 mmc_active);
1441 struct request *req = mq_rq->req;
1442 struct mmc_packed *packed = mq_rq->packed;
1443 int err, check, status;
1444 u8 *ext_csd;
1445
ce39f9d1
SJ		 1446 packed->retries--;
1447 check = mmc_blk_err_check(card, areq);
1448 err = get_card_status(card, &status, 0);
1449 if (err) {
1450 pr_err("%s: error %d sending status command\n",
1451 req->rq_disk->disk_name, err);
1452 return MMC_BLK_ABORT;
1453 }
1454
1455 if (status & R1_EXCEPTION_EVENT) {
86817ffb 1456 err = mmc_get_ext_csd(card, &ext_csd);
ce39f9d1
SJ		 1457 if (err) {
1458 pr_err("%s: error %d sending ext_csd\n",
1459 req->rq_disk->disk_name, err);
86817ffb 1460 return MMC_BLK_ABORT;
ce39f9d1
SJ		 1461 }
1462
1463 if ((ext_csd[EXT_CSD_EXP_EVENTS_STATUS] &
1464 EXT_CSD_PACKED_FAILURE) &&
1465 (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1466 EXT_CSD_PACKED_GENERIC_ERROR)) {
1467 if (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1468 EXT_CSD_PACKED_INDEXED_ERROR) {
1469 packed->idx_failure =
1470 ext_csd[EXT_CSD_PACKED_FAILURE_INDEX] - 1;
1471 check = MMC_BLK_PARTIAL;
1472 }
1473 pr_err("%s: packed cmd failed, nr %u, sectors %u, "
1474 "failure index: %d\n",
1475 req->rq_disk->disk_name, packed->nr_entries,
1476 packed->blocks, packed->idx_failure);
1477 }
ce39f9d1
SJ		 1478 kfree(ext_csd);
1479 }
1480
1481 return check;
1482}
1483
54d49d77
PF		 1484static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
1485 struct mmc_card *card,
1486 int disable_multi,
1487 struct mmc_queue *mq)
1da177e4 1488{
54d49d77
PF		 1489 u32 readcmd, writecmd;
1490 struct mmc_blk_request *brq = &mqrq->brq;
1491 struct request *req = mqrq->req;
1da177e4 1492 struct mmc_blk_data *md = mq->data;
4265900e 1493 bool do_data_tag;
1da177e4 1494
f4c5522b
AW		 1495 /*
1496 * Reliable writes are used to implement Forced Unit Access and
d3df0465 1497 * are supported only on MMCs.
f4c5522b 1498 */
d3df0465 1499 bool do_rel_wr = (req->cmd_flags & REQ_FUA) &&
f4c5522b 1500 (rq_data_dir(req) == WRITE) &&
d0c97cfb 1501 (md->flags & MMC_BLK_REL_WR);
f4c5522b 1502
54d49d77
PF		 1503 memset(brq, 0, sizeof(struct mmc_blk_request));
1504 brq->mrq.cmd = &brq->cmd;
1505 brq->mrq.data = &brq->data;
1da177e4 1506
54d49d77
PF		 1507 brq->cmd.arg = blk_rq_pos(req);
1508 if (!mmc_card_blockaddr(card))
1509 brq->cmd.arg <<= 9;
1510 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1511 brq->data.blksz = 512;
1512 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1513 brq->stop.arg = 0;
54d49d77 1514 brq->data.blocks = blk_rq_sectors(req);
6a79e391 1515
54d49d77
PF		 1516 /*
1517 * The block layer doesn't support all sector count
1518 * restrictions, so we need to be prepared for too big
1519 * requests.
1520 */
1521 if (brq->data.blocks > card->host->max_blk_count)
1522 brq->data.blocks = card->host->max_blk_count;
1da177e4 1523
2bf22b39
PW		 1524 if (brq->data.blocks > 1) {
1525 /*
1526 * After a read error, we redo the request one sector
1527 * at a time in order to accurately determine which
1528 * sectors can be read successfully.
1529 */
1530 if (disable_multi)
1531 brq->data.blocks = 1;
1532
2e47e842
KM		 1533 /*
1534 * Some controllers have HW issues while operating
1535 * in multiple I/O mode
1536 */
1537 if (card->host->ops->multi_io_quirk)
1538 brq->data.blocks = card->host->ops->multi_io_quirk(card,
1539 (rq_data_dir(req) == READ) ?
1540 MMC_DATA_READ : MMC_DATA_WRITE,
1541 brq->data.blocks);
2bf22b39 1542 }
d0c97cfb 1543
54d49d77
PF		 1544 if (brq->data.blocks > 1 || do_rel_wr) {
1545 /* SPI multiblock writes terminate using a special
1546 * token, not a STOP_TRANSMISSION request.
d0c97cfb 1547 */
54d49d77
PF		 1548 if (!mmc_host_is_spi(card->host) ||
1549 rq_data_dir(req) == READ)
1550 brq->mrq.stop = &brq->stop;
1551 readcmd = MMC_READ_MULTIPLE_BLOCK;
1552 writecmd = MMC_WRITE_MULTIPLE_BLOCK;
1553 } else {
1554 brq->mrq.stop = NULL;
1555 readcmd = MMC_READ_SINGLE_BLOCK;
1556 writecmd = MMC_WRITE_BLOCK;
1557 }
1558 if (rq_data_dir(req) == READ) {
1559 brq->cmd.opcode = readcmd;
f53f1102 1560 brq->data.flags = MMC_DATA_READ;
bcc3e172
UH		 1561 if (brq->mrq.stop)
1562 brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 |
1563 MMC_CMD_AC;
54d49d77
PF		 1564 } else {
1565 brq->cmd.opcode = writecmd;
f53f1102 1566 brq->data.flags = MMC_DATA_WRITE;
bcc3e172
UH		 1567 if (brq->mrq.stop)
1568 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B |
1569 MMC_CMD_AC;
54d49d77 1570 }
d0c97cfb 1571
54d49d77
PF		 1572 if (do_rel_wr)
1573 mmc_apply_rel_rw(brq, card, req);
f4c5522b 1574
4265900e
SD		 1575 /*
1576 * Data tag is used only during writing meta data to speed
1577 * up write and any subsequent read of this meta data
1578 */
1579 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1580 (req->cmd_flags & REQ_META) &&
1581 (rq_data_dir(req) == WRITE) &&
1582 ((brq->data.blocks * brq->data.blksz) >=
1583 card->ext_csd.data_tag_unit_size);
1584
54d49d77
PF		 1585 /*
1586 * Pre-defined multi-block transfers are preferable to
1587 * open ended-ones (and necessary for reliable writes).
1588 * However, it is not sufficient to just send CMD23,
1589 * and avoid the final CMD12, as on an error condition
1590 * CMD12 (stop) needs to be sent anyway. This, coupled
1591 * with Auto-CMD23 enhancements provided by some
1592 * hosts, means that the complexity of dealing
1593 * with this is best left to the host. If CMD23 is
1594 * supported by card and host, we'll fill sbc in and let
1595 * the host deal with handling it correctly. This means
1596 * that for hosts that don't expose MMC_CAP_CMD23, no
1597 * change of behavior will be observed.
1598 *
1599 * N.B: Some MMC cards experience perf degradation.
1600 * We'll avoid using CMD23-bounded multiblock writes for
1601 * these, while retaining features like reliable writes.
1602 */
4265900e
SD		 1603 if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) &&
1604 (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) ||
1605 do_data_tag)) {
54d49d77
PF		 1606 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1607 brq->sbc.arg = brq->data.blocks |
4265900e
SD		 1608 (do_rel_wr ? (1 << 31) : 0) |
1609 (do_data_tag ? (1 << 29) : 0);
54d49d77
PF		 1610 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1611 brq->mrq.sbc = &brq->sbc;
1612 }
98ccf149 1613
54d49d77
PF		 1614 mmc_set_data_timeout(&brq->data, card);
1615
1616 brq->data.sg = mqrq->sg;
1617 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1618
1619 /*
1620 * Adjust the sg list so it is the same size as the
1621 * request.
1622 */
1623 if (brq->data.blocks != blk_rq_sectors(req)) {
1624 int i, data_size = brq->data.blocks << 9;
1625 struct scatterlist *sg;
1626
1627 for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) {
1628 data_size -= sg->length;
1629 if (data_size <= 0) {
1630 sg->length += data_size;
1631 i++;
1632 break;
6a79e391 1633 }
6a79e391 1634 }
54d49d77
PF		 1635 brq->data.sg_len = i;
1636 }
1637
ee8a43a5
PF		 1638 mqrq->mmc_active.mrq = &brq->mrq;
1639 mqrq->mmc_active.err_check = mmc_blk_err_check;
1640
54d49d77
PF		 1641 mmc_queue_bounce_pre(mqrq);
1642}
6a79e391 1643
ce39f9d1
SJ		 1644static inline u8 mmc_calc_packed_hdr_segs(struct request_queue *q,
1645 struct mmc_card *card)
1646{
1647 unsigned int hdr_sz = mmc_large_sector(card) ? 4096 : 512;
1648 unsigned int max_seg_sz = queue_max_segment_size(q);
1649 unsigned int len, nr_segs = 0;
1650
1651 do {
1652 len = min(hdr_sz, max_seg_sz);
1653 hdr_sz -= len;
1654 nr_segs++;
1655 } while (hdr_sz);
1656
1657 return nr_segs;
1658}
1659
1660static u8 mmc_blk_prep_packed_list(struct mmc_queue *mq, struct request *req)
1661{
1662 struct request_queue *q = mq->queue;
1663 struct mmc_card *card = mq->card;
1664 struct request *cur = req, *next = NULL;
1665 struct mmc_blk_data *md = mq->data;
1666 struct mmc_queue_req *mqrq = mq->mqrq_cur;
1667 bool en_rel_wr = card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN;
1668 unsigned int req_sectors = 0, phys_segments = 0;
1669 unsigned int max_blk_count, max_phys_segs;
1670 bool put_back = true;
1671 u8 max_packed_rw = 0;
1672 u8 reqs = 0;
1673
96e52daa
SL		 1674 /*
1675 * We don't need to check packed for any further
1676 * operation of packed stuff as we set MMC_PACKED_NONE
1677 * and return zero for reqs if geting null packed. Also
1678 * we clean the flag of MMC_BLK_PACKED_CMD to avoid doing
1679 * it again when removing blk req.
1680 */
1681 if (!mqrq->packed) {
1682 md->flags &= (~MMC_BLK_PACKED_CMD);
1683 goto no_packed;
1684 }
1685
ce39f9d1
SJ		 1686 if (!(md->flags & MMC_BLK_PACKED_CMD))
1687 goto no_packed;
1688
1689 if ((rq_data_dir(cur) == WRITE) &&
1690 mmc_host_packed_wr(card->host))
1691 max_packed_rw = card->ext_csd.max_packed_writes;
1692
1693 if (max_packed_rw == 0)
1694 goto no_packed;
1695
1696 if (mmc_req_rel_wr(cur) &&
1697 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1698 goto no_packed;
1699
1700 if (mmc_large_sector(card) &&
1701 !IS_ALIGNED(blk_rq_sectors(cur), 8))
1702 goto no_packed;
1703
1704 mmc_blk_clear_packed(mqrq);
1705
1706 max_blk_count = min(card->host->max_blk_count,
1707 card->host->max_req_size >> 9);
1708 if (unlikely(max_blk_count > 0xffff))
1709 max_blk_count = 0xffff;
1710
1711 max_phys_segs = queue_max_segments(q);
1712 req_sectors += blk_rq_sectors(cur);
1713 phys_segments += cur->nr_phys_segments;
1714
1715 if (rq_data_dir(cur) == WRITE) {
1716 req_sectors += mmc_large_sector(card) ? 8 : 1;
1717 phys_segments += mmc_calc_packed_hdr_segs(q, card);
1718 }
1719
1720 do {
1721 if (reqs >= max_packed_rw - 1) {
1722 put_back = false;
1723 break;
1724 }
1725
1726 spin_lock_irq(q->queue_lock);
1727 next = blk_fetch_request(q);
1728 spin_unlock_irq(q->queue_lock);
1729 if (!next) {
1730 put_back = false;
1731 break;
1732 }
1733
1734 if (mmc_large_sector(card) &&
1735 !IS_ALIGNED(blk_rq_sectors(next), 8))
1736 break;
1737
3a5e02ce 1738 if (req_op(next) == REQ_OP_DISCARD ||
7afafc8a 1739 req_op(next) == REQ_OP_SECURE_ERASE ||
3a5e02ce 1740 req_op(next) == REQ_OP_FLUSH)
ce39f9d1
SJ		 1741 break;
1742
1743 if (rq_data_dir(cur) != rq_data_dir(next))
1744 break;
1745
1746 if (mmc_req_rel_wr(next) &&
1747 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1748 break;
1749
1750 req_sectors += blk_rq_sectors(next);
1751 if (req_sectors > max_blk_count)
1752 break;
1753
1754 phys_segments += next->nr_phys_segments;
1755 if (phys_segments > max_phys_segs)
1756 break;
1757
1758 list_add_tail(&next->queuelist, &mqrq->packed->list);
1759 cur = next;
1760 reqs++;
1761 } while (1);
1762
1763 if (put_back) {
1764 spin_lock_irq(q->queue_lock);
1765 blk_requeue_request(q, next);
1766 spin_unlock_irq(q->queue_lock);
1767 }
1768
1769 if (reqs > 0) {
1770 list_add(&req->queuelist, &mqrq->packed->list);
1771 mqrq->packed->nr_entries = ++reqs;
1772 mqrq->packed->retries = reqs;
1773 return reqs;
1774 }
1775
1776no_packed:
1777 mqrq->cmd_type = MMC_PACKED_NONE;
1778 return 0;
1779}
1780
1781static void mmc_blk_packed_hdr_wrq_prep(struct mmc_queue_req *mqrq,
1782 struct mmc_card *card,
1783 struct mmc_queue *mq)
1784{
1785 struct mmc_blk_request *brq = &mqrq->brq;
1786 struct request *req = mqrq->req;
1787 struct request *prq;
1788 struct mmc_blk_data *md = mq->data;
1789 struct mmc_packed *packed = mqrq->packed;
1790 bool do_rel_wr, do_data_tag;
3f2d2664 1791 __le32 *packed_cmd_hdr;
ce39f9d1
SJ		 1792 u8 hdr_blocks;
1793 u8 i = 1;
1794
ce39f9d1
SJ		 1795 mqrq->cmd_type = MMC_PACKED_WRITE;
1796 packed->blocks = 0;
1797 packed->idx_failure = MMC_PACKED_NR_IDX;
1798
1799 packed_cmd_hdr = packed->cmd_hdr;
1800 memset(packed_cmd_hdr, 0, sizeof(packed->cmd_hdr));
f68381a7
TK		 1801 packed_cmd_hdr[0] = cpu_to_le32((packed->nr_entries << 16) |
1802 (PACKED_CMD_WR << 8) | PACKED_CMD_VER);
ce39f9d1
SJ		 1803 hdr_blocks = mmc_large_sector(card) ? 8 : 1;
1804
1805 /*
1806 * Argument for each entry of packed group
1807 */
1808 list_for_each_entry(prq, &packed->list, queuelist) {
1809 do_rel_wr = mmc_req_rel_wr(prq) && (md->flags & MMC_BLK_REL_WR);
1810 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1811 (prq->cmd_flags & REQ_META) &&
1812 (rq_data_dir(prq) == WRITE) &&
d806b46e 1813 blk_rq_bytes(prq) >= card->ext_csd.data_tag_unit_size;
ce39f9d1 1814 /* Argument of CMD23 */
f68381a7 1815 packed_cmd_hdr[(i * 2)] = cpu_to_le32(
ce39f9d1
SJ		 1816 (do_rel_wr ? MMC_CMD23_ARG_REL_WR : 0) |
1817 (do_data_tag ? MMC_CMD23_ARG_TAG_REQ : 0) |
f68381a7 1818 blk_rq_sectors(prq));
ce39f9d1 1819 /* Argument of CMD18 or CMD25 */
f68381a7 1820 packed_cmd_hdr[((i * 2)) + 1] = cpu_to_le32(
ce39f9d1 1821 mmc_card_blockaddr(card) ?
f68381a7 1822 blk_rq_pos(prq) : blk_rq_pos(prq) << 9);
ce39f9d1
SJ		 1823 packed->blocks += blk_rq_sectors(prq);
1824 i++;
1825 }
1826
1827 memset(brq, 0, sizeof(struct mmc_blk_request));
1828 brq->mrq.cmd = &brq->cmd;
1829 brq->mrq.data = &brq->data;
1830 brq->mrq.sbc = &brq->sbc;
1831 brq->mrq.stop = &brq->stop;
1832
1833 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1834 brq->sbc.arg = MMC_CMD23_ARG_PACKED | (packed->blocks + hdr_blocks);
1835 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1836
1837 brq->cmd.opcode = MMC_WRITE_MULTIPLE_BLOCK;
1838 brq->cmd.arg = blk_rq_pos(req);
1839 if (!mmc_card_blockaddr(card))
1840 brq->cmd.arg <<= 9;
1841 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1842
1843 brq->data.blksz = 512;
1844 brq->data.blocks = packed->blocks + hdr_blocks;
f53f1102 1845 brq->data.flags = MMC_DATA_WRITE;
ce39f9d1
SJ		 1846
1847 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1848 brq->stop.arg = 0;
1849 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
1850
1851 mmc_set_data_timeout(&brq->data, card);
1852
1853 brq->data.sg = mqrq->sg;
1854 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1855
1856 mqrq->mmc_active.mrq = &brq->mrq;
1857 mqrq->mmc_active.err_check = mmc_blk_packed_err_check;
1858
1859 mmc_queue_bounce_pre(mqrq);
1860}
1861
67716327
AH		 1862static int mmc_blk_cmd_err(struct mmc_blk_data *md, struct mmc_card *card,
1863 struct mmc_blk_request *brq, struct request *req,
1864 int ret)
1865{
ce39f9d1
SJ		 1866 struct mmc_queue_req *mq_rq;
1867 mq_rq = container_of(brq, struct mmc_queue_req, brq);
1868
67716327
AH		 1869 /*
1870 * If this is an SD card and we're writing, we can first
1871 * mark the known good sectors as ok.
1872 *
1873 * If the card is not SD, we can still ok written sectors
1874 * as reported by the controller (which might be less than
1875 * the real number of written sectors, but never more).
1876 */
1877 if (mmc_card_sd(card)) {
1878 u32 blocks;
1879
1880 blocks = mmc_sd_num_wr_blocks(card);
1881 if (blocks != (u32)-1) {
ecf8b5d0 1882 ret = blk_end_request(req, 0, blocks << 9);
67716327
AH		 1883 }
1884 } else {
ce39f9d1
SJ		 1885 if (!mmc_packed_cmd(mq_rq->cmd_type))
1886 ret = blk_end_request(req, 0, brq->data.bytes_xfered);
67716327
AH		 1887 }
1888 return ret;
1889}
1890
ce39f9d1
SJ		 1891static int mmc_blk_end_packed_req(struct mmc_queue_req *mq_rq)
1892{
1893 struct request *prq;
1894 struct mmc_packed *packed = mq_rq->packed;
1895 int idx = packed->idx_failure, i = 0;
1896 int ret = 0;
1897
ce39f9d1
SJ		 1898 while (!list_empty(&packed->list)) {
1899 prq = list_entry_rq(packed->list.next);
1900 if (idx == i) {
1901 /* retry from error index */
1902 packed->nr_entries -= idx;
1903 mq_rq->req = prq;
1904 ret = 1;
1905
1906 if (packed->nr_entries == MMC_PACKED_NR_SINGLE) {
1907 list_del_init(&prq->queuelist);
1908 mmc_blk_clear_packed(mq_rq);
1909 }
1910 return ret;
1911 }
1912 list_del_init(&prq->queuelist);
1913 blk_end_request(prq, 0, blk_rq_bytes(prq));
1914 i++;
1915 }
1916
1917 mmc_blk_clear_packed(mq_rq);
1918 return ret;
1919}
1920
1921static void mmc_blk_abort_packed_req(struct mmc_queue_req *mq_rq)
1922{
1923 struct request *prq;
1924 struct mmc_packed *packed = mq_rq->packed;
1925
ce39f9d1
SJ		 1926 while (!list_empty(&packed->list)) {
1927 prq = list_entry_rq(packed->list.next);
1928 list_del_init(&prq->queuelist);
1929 blk_end_request(prq, -EIO, blk_rq_bytes(prq));
1930 }
1931
1932 mmc_blk_clear_packed(mq_rq);
1933}
1934
1935static void mmc_blk_revert_packed_req(struct mmc_queue *mq,
1936 struct mmc_queue_req *mq_rq)
1937{
1938 struct request *prq;
1939 struct request_queue *q = mq->queue;
1940 struct mmc_packed *packed = mq_rq->packed;
1941
ce39f9d1
SJ		 1942 while (!list_empty(&packed->list)) {
1943 prq = list_entry_rq(packed->list.prev);
1944 if (prq->queuelist.prev != &packed->list) {
1945 list_del_init(&prq->queuelist);
1946 spin_lock_irq(q->queue_lock);
1947 blk_requeue_request(mq->queue, prq);
1948 spin_unlock_irq(q->queue_lock);
1949 } else {
1950 list_del_init(&prq->queuelist);
1951 }
1952 }
1953
1954 mmc_blk_clear_packed(mq_rq);
1955}
1956
ee8a43a5 1957static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc)
54d49d77
PF		 1958{
1959 struct mmc_blk_data *md = mq->data;
1960 struct mmc_card *card = md->queue.card;
1961 struct mmc_blk_request *brq = &mq->mqrq_cur->brq;
b8360a49 1962 int ret = 1, disable_multi = 0, retry = 0, type, retune_retry_done = 0;
d78d4a8a 1963 enum mmc_blk_status status;
ee8a43a5 1964 struct mmc_queue_req *mq_rq;
a5075eb9 1965 struct request *req = rqc;
ee8a43a5 1966 struct mmc_async_req *areq;
ce39f9d1
SJ		 1967 const u8 packed_nr = 2;
1968 u8 reqs = 0;
1da177e4 1969
ee8a43a5
PF		 1970 if (!rqc && !mq->mqrq_prev->req)
1971 return 0;
98ccf149 1972
ce39f9d1
SJ		 1973 if (rqc)
1974 reqs = mmc_blk_prep_packed_list(mq, rqc);
1975
ee8a43a5
PF		 1976 do {
1977 if (rqc) {
a5075eb9
SD		 1978 /*
1979 * When 4KB native sector is enabled, only 8 blocks
1980 * multiple read or write is allowed
1981 */
e87c8561
YJ		 1982 if (mmc_large_sector(card) &&
1983 !IS_ALIGNED(blk_rq_sectors(rqc), 8)) {
a5075eb9
SD		 1984 pr_err("%s: Transfer size is not 4KB sector size aligned\n",
1985 req->rq_disk->disk_name);
ce39f9d1 1986 mq_rq = mq->mqrq_cur;
a5075eb9
SD		 1987 goto cmd_abort;
1988 }
ce39f9d1
SJ		 1989
1990 if (reqs >= packed_nr)
1991 mmc_blk_packed_hdr_wrq_prep(mq->mqrq_cur,
1992 card, mq);
1993 else
1994 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
ee8a43a5
PF		 1995 areq = &mq->mqrq_cur->mmc_active;
1996 } else
1997 areq = NULL;
1998 areq = mmc_start_req(card->host, areq, (int *) &status);
2220eedf
KD		 1999 if (!areq) {
2000 if (status == MMC_BLK_NEW_REQUEST)
2001 mq->flags |= MMC_QUEUE_NEW_REQUEST;
ee8a43a5 2002 return 0;
2220eedf 2003 }
ee8a43a5
PF		 2004
2005 mq_rq = container_of(areq, struct mmc_queue_req, mmc_active);
2006 brq = &mq_rq->brq;
2007 req = mq_rq->req;
67716327 2008 type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
ee8a43a5 2009 mmc_queue_bounce_post(mq_rq);
98ccf149 2010
d78d4a8a
PF		 2011 switch (status) {
2012 case MMC_BLK_SUCCESS:
2013 case MMC_BLK_PARTIAL:
2014 /*
2015 * A block was successfully transferred.
2016 */
67716327 2017 mmc_blk_reset_success(md, type);
ce39f9d1
SJ		 2018
2019 if (mmc_packed_cmd(mq_rq->cmd_type)) {
2020 ret = mmc_blk_end_packed_req(mq_rq);
2021 break;
2022 } else {
2023 ret = blk_end_request(req, 0,
d78d4a8a 2024 brq->data.bytes_xfered);
ce39f9d1
SJ		 2025 }
2026
67716327
AH		 2027 /*
2028 * If the blk_end_request function returns non-zero even
2029 * though all data has been transferred and no errors
2030 * were returned by the host controller, it's a bug.
2031 */
ee8a43a5 2032 if (status == MMC_BLK_SUCCESS && ret) {
a3c76eb9 2033 pr_err("%s BUG rq_tot %d d_xfer %d\n",
ee8a43a5
PF		 2034 __func__, blk_rq_bytes(req),
2035 brq->data.bytes_xfered);
2036 rqc = NULL;
2037 goto cmd_abort;
2038 }
d78d4a8a
PF		 2039 break;
2040 case MMC_BLK_CMD_ERR:
67716327 2041 ret = mmc_blk_cmd_err(md, card, brq, req, ret);
29535f7b
DW		 2042 if (mmc_blk_reset(md, card->host, type))
2043 goto cmd_abort;
2044 if (!ret)
2045 goto start_new_req;
2046 break;
d78d4a8a 2047 case MMC_BLK_RETRY:
b8360a49 2048 retune_retry_done = brq->retune_retry_done;
d78d4a8a 2049 if (retry++ < 5)
a01f3ccf 2050 break;
67716327 2051 /* Fall through */
d78d4a8a 2052 case MMC_BLK_ABORT:
67716327
AH		 2053 if (!mmc_blk_reset(md, card->host, type))
2054 break;
4c2b8f26 2055 goto cmd_abort;
67716327
AH		 2056 case MMC_BLK_DATA_ERR: {
2057 int err;
2058
2059 err = mmc_blk_reset(md, card->host, type);
2060 if (!err)
2061 break;
ce39f9d1
SJ		 2062 if (err == -ENODEV ||
2063 mmc_packed_cmd(mq_rq->cmd_type))
67716327
AH		 2064 goto cmd_abort;
2065 /* Fall through */
2066 }
2067 case MMC_BLK_ECC_ERR:
2068 if (brq->data.blocks > 1) {
2069 /* Redo read one sector at a time */
6606110d
JP		 2070 pr_warn("%s: retrying using single block read\n",
2071 req->rq_disk->disk_name);
67716327
AH		 2072 disable_multi = 1;
2073 break;
2074 }
d78d4a8a
PF		 2075 /*
2076 * After an error, we redo I/O one sector at a
2077 * time, so we only reach here after trying to
2078 * read a single sector.
2079 */
ecf8b5d0 2080 ret = blk_end_request(req, -EIO,
d78d4a8a 2081 brq->data.blksz);
ee8a43a5
PF		 2082 if (!ret)
2083 goto start_new_req;
d78d4a8a 2084 break;
a8ad82cc
SRT		 2085 case MMC_BLK_NOMEDIUM:
2086 goto cmd_abort;
2220eedf
KD		 2087 default:
2088 pr_err("%s: Unhandled return value (%d)",
2089 req->rq_disk->disk_name, status);
2090 goto cmd_abort;
4c2b8f26
RKAL		 2091 }
2092
ee8a43a5 2093 if (ret) {
ce39f9d1
SJ		 2094 if (mmc_packed_cmd(mq_rq->cmd_type)) {
2095 if (!mq_rq->packed->retries)
2096 goto cmd_abort;
2097 mmc_blk_packed_hdr_wrq_prep(mq_rq, card, mq);
2098 mmc_start_req(card->host,
2099 &mq_rq->mmc_active, NULL);
2100 } else {
2101
2102 /*
2103 * In case of a incomplete request
2104 * prepare it again and resend.
2105 */
2106 mmc_blk_rw_rq_prep(mq_rq, card,
2107 disable_multi, mq);
2108 mmc_start_req(card->host,
2109 &mq_rq->mmc_active, NULL);
2110 }
b8360a49 2111 mq_rq->brq.retune_retry_done = retune_retry_done;
ee8a43a5 2112 }
1da177e4
LT		 2113 } while (ret);
2114
1da177e4
LT		 2115 return 1;
2116
a01f3ccf 2117 cmd_abort:
ce39f9d1
SJ		 2118 if (mmc_packed_cmd(mq_rq->cmd_type)) {
2119 mmc_blk_abort_packed_req(mq_rq);
2120 } else {
2121 if (mmc_card_removed(card))
2122 req->cmd_flags |= REQ_QUIET;
2123 while (ret)
2124 ret = blk_end_request(req, -EIO,
2125 blk_rq_cur_bytes(req));
2126 }
1da177e4 2127
ee8a43a5
PF		 2128 start_new_req:
2129 if (rqc) {
7a81902f
SJ		 2130 if (mmc_card_removed(card)) {
2131 rqc->cmd_flags |= REQ_QUIET;
2132 blk_end_request_all(rqc, -EIO);
2133 } else {
ce39f9d1
SJ		 2134 /*
2135 * If current request is packed, it needs to put back.
2136 */
2137 if (mmc_packed_cmd(mq->mqrq_cur->cmd_type))
2138 mmc_blk_revert_packed_req(mq, mq->mqrq_cur);
2139
7a81902f
SJ		 2140 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
2141 mmc_start_req(card->host,
2142 &mq->mqrq_cur->mmc_active, NULL);
2143 }
ee8a43a5
PF		 2144 }
2145
1da177e4
LT		 2146 return 0;
2147}
2148
29eb7bd0 2149int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
bd788c96 2150{
1a258db6
AW		 2151 int ret;
2152 struct mmc_blk_data *md = mq->data;
2153 struct mmc_card *card = md->queue.card;
2220eedf
KD		 2154 struct mmc_host *host = card->host;
2155 unsigned long flags;
869c5548 2156 bool req_is_special = mmc_req_is_special(req);
1a258db6 2157
ee8a43a5
PF		 2158 if (req && !mq->mqrq_prev->req)
2159 /* claim host only for the first request */
e94cfef6 2160 mmc_get_card(card);
ee8a43a5 2161
371a689f
AW		 2162 ret = mmc_blk_part_switch(card, md);
2163 if (ret) {
0d7d85ca 2164 if (req) {
ecf8b5d0 2165 blk_end_request_all(req, -EIO);
0d7d85ca 2166 }
371a689f
AW		 2167 ret = 0;
2168 goto out;
2169 }
1a258db6 2170
2220eedf 2171 mq->flags &= ~MMC_QUEUE_NEW_REQUEST;
c2df40df 2172 if (req && req_op(req) == REQ_OP_DISCARD) {
ee8a43a5
PF		 2173 /* complete ongoing async transfer before issuing discard */
2174 if (card->host->areq)
2175 mmc_blk_issue_rw_rq(mq, NULL);
288dab8a
CH		 2176 ret = mmc_blk_issue_discard_rq(mq, req);
2177 } else if (req && req_op(req) == REQ_OP_SECURE_ERASE) {
2178 /* complete ongoing async transfer before issuing secure erase*/
2179 if (card->host->areq)
2180 mmc_blk_issue_rw_rq(mq, NULL);
2181 ret = mmc_blk_issue_secdiscard_rq(mq, req);
3a5e02ce 2182 } else if (req && req_op(req) == REQ_OP_FLUSH) {
393f9a08
JC		 2183 /* complete ongoing async transfer before issuing flush */
2184 if (card->host->areq)
2185 mmc_blk_issue_rw_rq(mq, NULL);
1a258db6 2186 ret = mmc_blk_issue_flush(mq, req);
49804548 2187 } else {
2220eedf
KD		 2188 if (!req && host->areq) {
2189 spin_lock_irqsave(&host->context_info.lock, flags);
2190 host->context_info.is_waiting_last_req = true;
2191 spin_unlock_irqrestore(&host->context_info.lock, flags);
2192 }
1a258db6 2193 ret = mmc_blk_issue_rw_rq(mq, req);
49804548 2194 }
1a258db6 2195
371a689f 2196out:
869c5548 2197 if ((!req && !(mq->flags & MMC_QUEUE_NEW_REQUEST)) || req_is_special)
ef3a69c7
SJ		 2198 /*
2199 * Release host when there are no more requests
2200 * and after special request(discard, flush) is done.
2201 * In case sepecial request, there is no reentry to
2202 * the 'mmc_blk_issue_rq' with 'mqrq_prev->req'.
2203 */
e94cfef6 2204 mmc_put_card(card);
1a258db6 2205 return ret;
bd788c96 2206}
1da177e4 2207
a6f6c96b
RK		 2208static inline int mmc_blk_readonly(struct mmc_card *card)
2209{
2210 return mmc_card_readonly(card) ||
2211 !(card->csd.cmdclass & CCC_BLOCK_WRITE);
2212}
2213
371a689f
AW		 2214static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
2215 struct device *parent,
2216 sector_t size,
2217 bool default_ro,
add710ea
JR		 2218 const char *subname,
2219 int area_type)
1da177e4
LT		 2220{
2221 struct mmc_blk_data *md;
2222 int devidx, ret;
2223
b10fa99e
UH		 2224again:
2225 if (!ida_pre_get(&mmc_blk_ida, GFP_KERNEL))
2226 return ERR_PTR(-ENOMEM);
2227
2228 spin_lock(&mmc_blk_lock);
2229 ret = ida_get_new(&mmc_blk_ida, &devidx);
2230 spin_unlock(&mmc_blk_lock);
2231
2232 if (ret == -EAGAIN)
2233 goto again;
2234 else if (ret)
2235 return ERR_PTR(ret);
2236
2237 if (devidx >= max_devices) {
2238 ret = -ENOSPC;
2239 goto out;
2240 }
1da177e4 2241
dd00cc48 2242 md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL);
a6f6c96b
RK		 2243 if (!md) {
2244 ret = -ENOMEM;
2245 goto out;
2246 }
1da177e4 2247
add710ea
JR		 2248 md->area_type = area_type;
2249
a6f6c96b
RK		 2250 /*
2251 * Set the read-only status based on the supported commands
2252 * and the write protect switch.
2253 */
2254 md->read_only = mmc_blk_readonly(card);
1da177e4 2255
5e71b7a6 2256 md->disk = alloc_disk(perdev_minors);
a6f6c96b
RK		 2257 if (md->disk == NULL) {
2258 ret = -ENOMEM;
2259 goto err_kfree;
2260 }
1da177e4 2261
a6f6c96b 2262 spin_lock_init(&md->lock);
371a689f 2263 INIT_LIST_HEAD(&md->part);
a6f6c96b 2264 md->usage = 1;
1da177e4 2265
d09408ad 2266 ret = mmc_init_queue(&md->queue, card, &md->lock, subname);
a6f6c96b
RK		 2267 if (ret)
2268 goto err_putdisk;
1da177e4 2269
a6f6c96b 2270 md->queue.data = md;
d2b18394 2271
fe6b4c88 2272 md->disk->major = MMC_BLOCK_MAJOR;
5e71b7a6 2273 md->disk->first_minor = devidx * perdev_minors;
a6f6c96b
RK		 2274 md->disk->fops = &mmc_bdops;
2275 md->disk->private_data = md;
2276 md->disk->queue = md->queue.queue;
307d8e6f 2277 md->parent = parent;
371a689f 2278 set_disk_ro(md->disk, md->read_only || default_ro);
382c55f8 2279 md->disk->flags = GENHD_FL_EXT_DEVT;
f5b4d71f 2280 if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT))
53d8f974 2281 md->disk->flags |= GENHD_FL_NO_PART_SCAN;
a6f6c96b
RK		 2282
2283 /*
2284 * As discussed on lkml, GENHD_FL_REMOVABLE should:
2285 *
2286 * - be set for removable media with permanent block devices
2287 * - be unset for removable block devices with permanent media
2288 *
2289 * Since MMC block devices clearly fall under the second
2290 * case, we do not set GENHD_FL_REMOVABLE. Userspace
2291 * should use the block device creation/destruction hotplug
2292 * messages to tell when the card is present.
2293 */
2294
f06c9153 2295 snprintf(md->disk->disk_name, sizeof(md->disk->disk_name),
9aaf3437 2296 "mmcblk%u%s", card->host->index, subname ? subname : "");
a6f6c96b 2297
a5075eb9
SD		 2298 if (mmc_card_mmc(card))
2299 blk_queue_logical_block_size(md->queue.queue,
2300 card->ext_csd.data_sector_size);
2301 else
2302 blk_queue_logical_block_size(md->queue.queue, 512);
2303
371a689f 2304 set_capacity(md->disk, size);
d0c97cfb 2305
f0d89972 2306 if (mmc_host_cmd23(card->host)) {
0ed50abb
DG		 2307 if ((mmc_card_mmc(card) &&
2308 card->csd.mmca_vsn >= CSD_SPEC_VER_3) ||
f0d89972
AW		 2309 (mmc_card_sd(card) &&
2310 card->scr.cmds & SD_SCR_CMD23_SUPPORT))
2311 md->flags |= MMC_BLK_CMD23;
2312 }
d0c97cfb
AW		 2313
2314 if (mmc_card_mmc(card) &&
2315 md->flags & MMC_BLK_CMD23 &&
2316 ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) ||
2317 card->ext_csd.rel_sectors)) {
2318 md->flags |= MMC_BLK_REL_WR;
e9d5c746 2319 blk_queue_write_cache(md->queue.queue, true, true);
d0c97cfb
AW		 2320 }
2321
ce39f9d1
SJ		 2322 if (mmc_card_mmc(card) &&
2323 (area_type == MMC_BLK_DATA_AREA_MAIN) &&
2324 (md->flags & MMC_BLK_CMD23) &&
2325 card->ext_csd.packed_event_en) {
2326 if (!mmc_packed_init(&md->queue, card))
2327 md->flags |= MMC_BLK_PACKED_CMD;
2328 }
2329
371a689f
AW		 2330 return md;
2331
2332 err_putdisk:
2333 put_disk(md->disk);
2334 err_kfree:
2335 kfree(md);
2336 out:
b10fa99e
UH		 2337 spin_lock(&mmc_blk_lock);
2338 ida_remove(&mmc_blk_ida, devidx);
2339 spin_unlock(&mmc_blk_lock);
371a689f
AW		 2340 return ERR_PTR(ret);
2341}
2342
2343static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
2344{
2345 sector_t size;
a6f6c96b 2346
85a18ad9
PO		 2347 if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) {
2348 /*
2349 * The EXT_CSD sector count is in number or 512 byte
2350 * sectors.
2351 */
371a689f 2352 size = card->ext_csd.sectors;
85a18ad9
PO		 2353 } else {
2354 /*
2355 * The CSD capacity field is in units of read_blkbits.
2356 * set_capacity takes units of 512 bytes.
2357 */
087de9ed
KM		 2358 size = (typeof(sector_t))card->csd.capacity
2359 << (card->csd.read_blkbits - 9);
85a18ad9 2360 }
371a689f 2361
7a30f2af 2362 return mmc_blk_alloc_req(card, &card->dev, size, false, NULL,
add710ea 2363 MMC_BLK_DATA_AREA_MAIN);
371a689f 2364}
a6f6c96b 2365
371a689f
AW		 2366static int mmc_blk_alloc_part(struct mmc_card *card,
2367 struct mmc_blk_data *md,
2368 unsigned int part_type,
2369 sector_t size,
2370 bool default_ro,
add710ea
JR		 2371 const char *subname,
2372 int area_type)
371a689f
AW		 2373{
2374 char cap_str[10];
2375 struct mmc_blk_data *part_md;
2376
2377 part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro,
add710ea 2378 subname, area_type);
371a689f
AW		 2379 if (IS_ERR(part_md))
2380 return PTR_ERR(part_md);
2381 part_md->part_type = part_type;
2382 list_add(&part_md->part, &md->part);
2383
b9f28d86 2384 string_get_size((u64)get_capacity(part_md->disk), 512, STRING_UNITS_2,
371a689f 2385 cap_str, sizeof(cap_str));
a3c76eb9 2386 pr_info("%s: %s %s partition %u %s\n",
371a689f
AW		 2387 part_md->disk->disk_name, mmc_card_id(card),
2388 mmc_card_name(card), part_md->part_type, cap_str);
2389 return 0;
2390}
2391
e0c368d5
NJ		 2392/* MMC Physical partitions consist of two boot partitions and
2393 * up to four general purpose partitions.
2394 * For each partition enabled in EXT_CSD a block device will be allocatedi
2395 * to provide access to the partition.
2396 */
2397
371a689f
AW		 2398static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md)
2399{
e0c368d5 2400 int idx, ret = 0;
371a689f
AW		 2401
2402 if (!mmc_card_mmc(card))
2403 return 0;
2404
e0c368d5
NJ		 2405 for (idx = 0; idx < card->nr_parts; idx++) {
2406 if (card->part[idx].size) {
2407 ret = mmc_blk_alloc_part(card, md,
2408 card->part[idx].part_cfg,
2409 card->part[idx].size >> 9,
2410 card->part[idx].force_ro,
add710ea
JR		 2411 card->part[idx].name,
2412 card->part[idx].area_type);
e0c368d5
NJ		 2413 if (ret)
2414 return ret;
2415 }
371a689f
AW		 2416 }
2417
2418 return ret;
1da177e4
LT		 2419}
2420
371a689f
AW		 2421static void mmc_blk_remove_req(struct mmc_blk_data *md)
2422{
add710ea
JR		 2423 struct mmc_card *card;
2424
371a689f 2425 if (md) {
fdfa20c1
PT		 2426 /*
2427 * Flush remaining requests and free queues. It
2428 * is freeing the queue that stops new requests
2429 * from being accepted.
2430 */
8efb83a2 2431 card = md->queue.card;
fdfa20c1
PT		 2432 mmc_cleanup_queue(&md->queue);
2433 if (md->flags & MMC_BLK_PACKED_CMD)
2434 mmc_packed_clean(&md->queue);
371a689f
AW		 2435 if (md->disk->flags & GENHD_FL_UP) {
2436 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
add710ea
JR		 2437 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2438 card->ext_csd.boot_ro_lockable)
2439 device_remove_file(disk_to_dev(md->disk),
2440 &md->power_ro_lock);
371a689f 2441
371a689f
AW		 2442 del_gendisk(md->disk);
2443 }
371a689f
AW		 2444 mmc_blk_put(md);
2445 }
2446}
2447
2448static void mmc_blk_remove_parts(struct mmc_card *card,
2449 struct mmc_blk_data *md)
2450{
2451 struct list_head *pos, *q;
2452 struct mmc_blk_data *part_md;
2453
2454 list_for_each_safe(pos, q, &md->part) {
2455 part_md = list_entry(pos, struct mmc_blk_data, part);
2456 list_del(pos);
2457 mmc_blk_remove_req(part_md);
2458 }
2459}
2460
2461static int mmc_add_disk(struct mmc_blk_data *md)
2462{
2463 int ret;
add710ea 2464 struct mmc_card *card = md->queue.card;
371a689f 2465
307d8e6f 2466 device_add_disk(md->parent, md->disk);
371a689f
AW		 2467 md->force_ro.show = force_ro_show;
2468 md->force_ro.store = force_ro_store;
641c3187 2469 sysfs_attr_init(&md->force_ro.attr);
371a689f
AW		 2470 md->force_ro.attr.name = "force_ro";
2471 md->force_ro.attr.mode = S_IRUGO | S_IWUSR;
2472 ret = device_create_file(disk_to_dev(md->disk), &md->force_ro);
2473 if (ret)
add710ea
JR		 2474 goto force_ro_fail;
2475
2476 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2477 card->ext_csd.boot_ro_lockable) {
88187398 2478 umode_t mode;
add710ea
JR		 2479
2480 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS)
2481 mode = S_IRUGO;
2482 else
2483 mode = S_IRUGO | S_IWUSR;
2484
2485 md->power_ro_lock.show = power_ro_lock_show;
2486 md->power_ro_lock.store = power_ro_lock_store;
00d9ac08 2487 sysfs_attr_init(&md->power_ro_lock.attr);
add710ea
JR		 2488 md->power_ro_lock.attr.mode = mode;
2489 md->power_ro_lock.attr.name =
2490 "ro_lock_until_next_power_on";
2491 ret = device_create_file(disk_to_dev(md->disk),
2492 &md->power_ro_lock);
2493 if (ret)
2494 goto power_ro_lock_fail;
2495 }
2496 return ret;
2497
2498power_ro_lock_fail:
2499 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2500force_ro_fail:
2501 del_gendisk(md->disk);
371a689f
AW		 2502
2503 return ret;
2504}
2505
6f60c222
AW		 2506static const struct mmc_fixup blk_fixups[] =
2507{
c59d4473
CB		 2508 MMC_FIXUP("SEM02G", CID_MANFID_SANDISK, 0x100, add_quirk,
2509 MMC_QUIRK_INAND_CMD38),
2510 MMC_FIXUP("SEM04G", CID_MANFID_SANDISK, 0x100, add_quirk,
2511 MMC_QUIRK_INAND_CMD38),
2512 MMC_FIXUP("SEM08G", CID_MANFID_SANDISK, 0x100, add_quirk,
2513 MMC_QUIRK_INAND_CMD38),
2514 MMC_FIXUP("SEM16G", CID_MANFID_SANDISK, 0x100, add_quirk,
2515 MMC_QUIRK_INAND_CMD38),
2516 MMC_FIXUP("SEM32G", CID_MANFID_SANDISK, 0x100, add_quirk,
2517 MMC_QUIRK_INAND_CMD38),
d0c97cfb
AW		 2518
2519 /*
2520 * Some MMC cards experience performance degradation with CMD23
2521 * instead of CMD12-bounded multiblock transfers. For now we'll
2522 * black list what's bad...
2523 * - Certain Toshiba cards.
2524 *
2525 * N.B. This doesn't affect SD cards.
2526 */
7d70d476
YL		 2527 MMC_FIXUP("SDMB-32", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
2528 MMC_QUIRK_BLK_NO_CMD23),
2529 MMC_FIXUP("SDM032", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
2530 MMC_QUIRK_BLK_NO_CMD23),
c59d4473 2531 MMC_FIXUP("MMC08G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
d0c97cfb 2532 MMC_QUIRK_BLK_NO_CMD23),
c59d4473 2533 MMC_FIXUP("MMC16G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
d0c97cfb 2534 MMC_QUIRK_BLK_NO_CMD23),
c59d4473 2535 MMC_FIXUP("MMC32G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
d0c97cfb 2536 MMC_QUIRK_BLK_NO_CMD23),
6de5fc9c
SNX		 2537
2538 /*
32ecd320 2539 * Some MMC cards need longer data read timeout than indicated in CSD.
6de5fc9c 2540 */
c59d4473 2541 MMC_FIXUP(CID_NAME_ANY, CID_MANFID_MICRON, 0x200, add_quirk_mmc,
6de5fc9c 2542 MMC_QUIRK_LONG_READ_TIME),
32ecd320
MG		 2543 MMC_FIXUP("008GE0", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2544 MMC_QUIRK_LONG_READ_TIME),
6de5fc9c 2545
3550ccdb
IC		 2546 /*
2547 * On these Samsung MoviNAND parts, performing secure erase or
2548 * secure trim can result in unrecoverable corruption due to a
2549 * firmware bug.
2550 */
2551 MMC_FIXUP("M8G2FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2552 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2553 MMC_FIXUP("MAG4FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2554 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2555 MMC_FIXUP("MBG8FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2556 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2557 MMC_FIXUP("MCGAFA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2558 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2559 MMC_FIXUP("VAL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2560 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2561 MMC_FIXUP("VYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2562 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2563 MMC_FIXUP("KYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2564 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2565 MMC_FIXUP("VZL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2566 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2567
b5b4ff0a
SL		 2568 /*
2569 * On Some Kingston eMMCs, performing trim can result in
2570 * unrecoverable data conrruption occasionally due to a firmware bug.
2571 */
2572 MMC_FIXUP("V10008", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
2573 MMC_QUIRK_TRIM_BROKEN),
2574 MMC_FIXUP("V10016", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
2575 MMC_QUIRK_TRIM_BROKEN),
2576
6f60c222
AW		 2577 END_FIXUP
2578};
2579
96541bac 2580static int mmc_blk_probe(struct mmc_card *card)
1da177e4 2581{
371a689f 2582 struct mmc_blk_data *md, *part_md;
a7bbb573
PO		 2583 char cap_str[10];
2584
912490db
PO		 2585 /*
2586 * Check that the card supports the command class(es) we need.
2587 */
2588 if (!(card->csd.cmdclass & CCC_BLOCK_READ))
1da177e4
LT		 2589 return -ENODEV;
2590
5204d00f
LC		 2591 mmc_fixup_device(card, blk_fixups);
2592
1da177e4
LT		 2593 md = mmc_blk_alloc(card);
2594 if (IS_ERR(md))
2595 return PTR_ERR(md);
2596
b9f28d86 2597 string_get_size((u64)get_capacity(md->disk), 512, STRING_UNITS_2,
a7bbb573 2598 cap_str, sizeof(cap_str));
a3c76eb9 2599 pr_info("%s: %s %s %s %s\n",
1da177e4 2600 md->disk->disk_name, mmc_card_id(card), mmc_card_name(card),
a7bbb573 2601 cap_str, md->read_only ? "(ro)" : "");
1da177e4 2602
371a689f
AW		 2603 if (mmc_blk_alloc_parts(card, md))
2604 goto out;
2605
96541bac 2606 dev_set_drvdata(&card->dev, md);
6f60c222 2607
371a689f
AW		 2608 if (mmc_add_disk(md))
2609 goto out;
2610
2611 list_for_each_entry(part_md, &md->part, part) {
2612 if (mmc_add_disk(part_md))
2613 goto out;
2614 }
e94cfef6
UH		 2615
2616 pm_runtime_set_autosuspend_delay(&card->dev, 3000);
2617 pm_runtime_use_autosuspend(&card->dev);
2618
2619 /*
2620 * Don't enable runtime PM for SD-combo cards here. Leave that
2621 * decision to be taken during the SDIO init sequence instead.
2622 */
2623 if (card->type != MMC_TYPE_SD_COMBO) {
2624 pm_runtime_set_active(&card->dev);
2625 pm_runtime_enable(&card->dev);
2626 }
2627
1da177e4
LT		 2628 return 0;
2629
2630 out:
371a689f
AW		 2631 mmc_blk_remove_parts(card, md);
2632 mmc_blk_remove_req(md);
5865f287 2633 return 0;
1da177e4
LT		 2634}
2635
96541bac 2636static void mmc_blk_remove(struct mmc_card *card)
1da177e4 2637{
96541bac 2638 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
1da177e4 2639
371a689f 2640 mmc_blk_remove_parts(card, md);
e94cfef6 2641 pm_runtime_get_sync(&card->dev);
ddd6fa7e
AH		 2642 mmc_claim_host(card->host);
2643 mmc_blk_part_switch(card, md);
2644 mmc_release_host(card->host);
e94cfef6
UH		 2645 if (card->type != MMC_TYPE_SD_COMBO)
2646 pm_runtime_disable(&card->dev);
2647 pm_runtime_put_noidle(&card->dev);
371a689f 2648 mmc_blk_remove_req(md);
96541bac 2649 dev_set_drvdata(&card->dev, NULL);
1da177e4
LT		 2650}
2651
96541bac 2652static int _mmc_blk_suspend(struct mmc_card *card)
1da177e4 2653{
371a689f 2654 struct mmc_blk_data *part_md;
96541bac 2655 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
1da177e4
LT		 2656
2657 if (md) {
2658 mmc_queue_suspend(&md->queue);
371a689f
AW		 2659 list_for_each_entry(part_md, &md->part, part) {
2660 mmc_queue_suspend(&part_md->queue);
2661 }
1da177e4
LT		 2662 }
2663 return 0;
2664}
2665
96541bac 2666static void mmc_blk_shutdown(struct mmc_card *card)
76287748 2667{
96541bac 2668 _mmc_blk_suspend(card);
76287748
UH		 2669}
2670
0967edc6
UH		 2671#ifdef CONFIG_PM_SLEEP
2672static int mmc_blk_suspend(struct device *dev)
76287748 2673{
96541bac
UH		 2674 struct mmc_card *card = mmc_dev_to_card(dev);
2675
2676 return _mmc_blk_suspend(card);
76287748
UH		 2677}
2678
0967edc6 2679static int mmc_blk_resume(struct device *dev)
1da177e4 2680{
371a689f 2681 struct mmc_blk_data *part_md;
fc95e30b 2682 struct mmc_blk_data *md = dev_get_drvdata(dev);
1da177e4
LT		 2683
2684 if (md) {
371a689f
AW		 2685 /*
2686 * Resume involves the card going into idle state,
2687 * so current partition is always the main one.
2688 */
2689 md->part_curr = md->part_type;
1da177e4 2690 mmc_queue_resume(&md->queue);
371a689f
AW		 2691 list_for_each_entry(part_md, &md->part, part) {
2692 mmc_queue_resume(&part_md->queue);
2693 }
1da177e4
LT		 2694 }
2695 return 0;
2696}
1da177e4
LT		 2697#endif
2698
0967edc6
UH		 2699static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops, mmc_blk_suspend, mmc_blk_resume);
2700
96541bac
UH		 2701static struct mmc_driver mmc_driver = {
2702 .drv = {
2703 .name = "mmcblk",
2704 .pm = &mmc_blk_pm_ops,
2705 },
1da177e4
LT		 2706 .probe = mmc_blk_probe,
2707 .remove = mmc_blk_remove,
76287748 2708 .shutdown = mmc_blk_shutdown,
1da177e4
LT		 2709};
2710
2711static int __init mmc_blk_init(void)
2712{
9d4e98e9 2713 int res;
1da177e4 2714
5e71b7a6
OJ		 2715 if (perdev_minors != CONFIG_MMC_BLOCK_MINORS)
2716 pr_info("mmcblk: using %d minors per device\n", perdev_minors);
2717
a26eba61 2718 max_devices = min(MAX_DEVICES, (1 << MINORBITS) / perdev_minors);
5e71b7a6 2719
fe6b4c88
PO		 2720 res = register_blkdev(MMC_BLOCK_MAJOR, "mmc");
2721 if (res)
1da177e4 2722 goto out;
1da177e4 2723
9d4e98e9
AM		 2724 res = mmc_register_driver(&mmc_driver);
2725 if (res)
2726 goto out2;
1da177e4 2727
9d4e98e9
AM		 2728 return 0;
2729 out2:
2730 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
1da177e4
LT		 2731 out:
2732 return res;
2733}
2734
2735static void __exit mmc_blk_exit(void)
2736{
2737 mmc_unregister_driver(&mmc_driver);
fe6b4c88 2738 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
1da177e4
LT		 2739}
2740
2741module_init(mmc_blk_init);
2742module_exit(mmc_blk_exit);
2743
2744MODULE_LICENSE("GPL");
2745MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver");
2746
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