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block, fs, drivers: remove REQ_OP compat defs and related code
[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>
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"
1da177e4 49
6b0b6285 50MODULE_ALIAS("mmc:block");
5e71b7a6
OJ		 51#ifdef MODULE_PARAM_PREFIX
52#undef MODULE_PARAM_PREFIX
53#endif
54#define MODULE_PARAM_PREFIX "mmcblk."
55
6a7a6b45
AW		 56#define INAND_CMD38_ARG_EXT_CSD 113
57#define INAND_CMD38_ARG_ERASE 0x00
58#define INAND_CMD38_ARG_TRIM 0x01
59#define INAND_CMD38_ARG_SECERASE 0x80
60#define INAND_CMD38_ARG_SECTRIM1 0x81
61#define INAND_CMD38_ARG_SECTRIM2 0x88
8fee476b 62#define MMC_BLK_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */
775a9362
ME		 63#define MMC_SANITIZE_REQ_TIMEOUT 240000
64#define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16)
6a7a6b45 65
d3df0465 66#define mmc_req_rel_wr(req) ((req->cmd_flags & REQ_FUA) && \
ce39f9d1
SJ		 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 81 * limited to (1 << 20) / number of minors per device. It is also
b10fa99e 82 * limited by the MAX_DEVICES below.
5e71b7a6
OJ		 83 */
84static int max_devices;
85
a26eba61
BH		 86#define MAX_DEVICES 256
87
b10fa99e
UH		 88static DEFINE_IDA(mmc_blk_ida);
89static DEFINE_SPINLOCK(mmc_blk_lock);
1da177e4 90
1da177e4
LT		 91/*
92 * There is one mmc_blk_data per slot.
93 */
94struct mmc_blk_data {
95 spinlock_t lock;
96 struct gendisk *disk;
97 struct mmc_queue queue;
371a689f 98 struct list_head part;
1da177e4 99
d0c97cfb
AW		 100 unsigned int flags;
101#define MMC_BLK_CMD23 (1 << 0) /* Can do SET_BLOCK_COUNT for multiblock */
102#define MMC_BLK_REL_WR (1 << 1) /* MMC Reliable write support */
ce39f9d1 103#define MMC_BLK_PACKED_CMD (1 << 2) /* MMC packed command support */
d0c97cfb 104
1da177e4 105 unsigned int usage;
a6f6c96b 106 unsigned int read_only;
371a689f 107 unsigned int part_type;
67716327
AH		 108 unsigned int reset_done;
109#define MMC_BLK_READ BIT(0)
110#define MMC_BLK_WRITE BIT(1)
111#define MMC_BLK_DISCARD BIT(2)
112#define MMC_BLK_SECDISCARD BIT(3)
371a689f
AW		 113
114 /*
115 * Only set in main mmc_blk_data associated
fc95e30b 116 * with mmc_card with dev_set_drvdata, and keeps
371a689f
AW		 117 * track of the current selected device partition.
118 */
119 unsigned int part_curr;
120 struct device_attribute force_ro;
add710ea
JR		 121 struct device_attribute power_ro_lock;
122 int area_type;
1da177e4
LT		 123};
124
a621aaed 125static DEFINE_MUTEX(open_lock);
1da177e4 126
ce39f9d1
SJ		 127enum {
128 MMC_PACKED_NR_IDX = -1,
129 MMC_PACKED_NR_ZERO,
130 MMC_PACKED_NR_SINGLE,
131};
132
5e71b7a6
OJ		 133module_param(perdev_minors, int, 0444);
134MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device");
135
8d1e977d
LP		 136static inline int mmc_blk_part_switch(struct mmc_card *card,
137 struct mmc_blk_data *md);
138static int get_card_status(struct mmc_card *card, u32 *status, int retries);
139
ce39f9d1
SJ		 140static inline void mmc_blk_clear_packed(struct mmc_queue_req *mqrq)
141{
142 struct mmc_packed *packed = mqrq->packed;
143
144 BUG_ON(!packed);
145
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
4d6144de
JR		 358 if (!idata->buf_bytes)
359 return idata;
360
1ff8950c 361 idata->buf = kmalloc(idata->buf_bytes, GFP_KERNEL);
cb87ea28
JC		 362 if (!idata->buf) {
363 err = -ENOMEM;
aea253ec 364 goto idata_err;
cb87ea28
JC		 365 }
366
367 if (copy_from_user(idata->buf, (void __user *)(unsigned long)
368 idata->ic.data_ptr, idata->buf_bytes)) {
369 err = -EFAULT;
370 goto copy_err;
371 }
372
373 return idata;
374
375copy_err:
376 kfree(idata->buf);
aea253ec 377idata_err:
cb87ea28 378 kfree(idata);
aea253ec 379out:
cb87ea28 380 return ERR_PTR(err);
cb87ea28
JC		 381}
382
a5f5774c
JH		 383static int mmc_blk_ioctl_copy_to_user(struct mmc_ioc_cmd __user *ic_ptr,
384 struct mmc_blk_ioc_data *idata)
385{
386 struct mmc_ioc_cmd *ic = &idata->ic;
387
388 if (copy_to_user(&(ic_ptr->response), ic->response,
389 sizeof(ic->response)))
390 return -EFAULT;
391
392 if (!idata->ic.write_flag) {
393 if (copy_to_user((void __user *)(unsigned long)ic->data_ptr,
394 idata->buf, idata->buf_bytes))
395 return -EFAULT;
396 }
397
398 return 0;
399}
400
8d1e977d
LP		 401static int ioctl_rpmb_card_status_poll(struct mmc_card *card, u32 *status,
402 u32 retries_max)
403{
404 int err;
405 u32 retry_count = 0;
406
407 if (!status || !retries_max)
408 return -EINVAL;
409
410 do {
411 err = get_card_status(card, status, 5);
412 if (err)
413 break;
414
415 if (!R1_STATUS(*status) &&
416 (R1_CURRENT_STATE(*status) != R1_STATE_PRG))
417 break; /* RPMB programming operation complete */
418
419 /*
420 * Rechedule to give the MMC device a chance to continue
421 * processing the previous command without being polled too
422 * frequently.
423 */
424 usleep_range(1000, 5000);
425 } while (++retry_count < retries_max);
426
427 if (retry_count == retries_max)
428 err = -EPERM;
429
430 return err;
431}
432
775a9362
ME		 433static int ioctl_do_sanitize(struct mmc_card *card)
434{
435 int err;
436
a2d1086d 437 if (!mmc_can_sanitize(card)) {
775a9362
ME		 438 pr_warn("%s: %s - SANITIZE is not supported\n",
439 mmc_hostname(card->host), __func__);
440 err = -EOPNOTSUPP;
441 goto out;
442 }
443
444 pr_debug("%s: %s - SANITIZE IN PROGRESS...\n",
445 mmc_hostname(card->host), __func__);
446
447 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
448 EXT_CSD_SANITIZE_START, 1,
449 MMC_SANITIZE_REQ_TIMEOUT);
450
451 if (err)
452 pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n",
453 mmc_hostname(card->host), __func__, err);
454
455 pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card->host),
456 __func__);
457out:
458 return err;
459}
460
a5f5774c
JH		 461static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md,
462 struct mmc_blk_ioc_data *idata)
cb87ea28 463{
cb87ea28
JC		 464 struct mmc_command cmd = {0};
465 struct mmc_data data = {0};
ad5fd972 466 struct mmc_request mrq = {NULL};
cb87ea28
JC		 467 struct scatterlist sg;
468 int err;
8d1e977d
LP		 469 int is_rpmb = false;
470 u32 status = 0;
cb87ea28 471
a5f5774c
JH		 472 if (!card || !md || !idata)
473 return -EINVAL;
cb87ea28 474
8d1e977d
LP		 475 if (md->area_type & MMC_BLK_DATA_AREA_RPMB)
476 is_rpmb = true;
477
4d6144de
JR		 478 cmd.opcode = idata->ic.opcode;
479 cmd.arg = idata->ic.arg;
480 cmd.flags = idata->ic.flags;
481
482 if (idata->buf_bytes) {
483 data.sg = &sg;
484 data.sg_len = 1;
485 data.blksz = idata->ic.blksz;
486 data.blocks = idata->ic.blocks;
487
488 sg_init_one(data.sg, idata->buf, idata->buf_bytes);
489
490 if (idata->ic.write_flag)
491 data.flags = MMC_DATA_WRITE;
492 else
493 data.flags = MMC_DATA_READ;
494
495 /* data.flags must already be set before doing this. */
496 mmc_set_data_timeout(&data, card);
497
498 /* Allow overriding the timeout_ns for empirical tuning. */
499 if (idata->ic.data_timeout_ns)
500 data.timeout_ns = idata->ic.data_timeout_ns;
501
502 if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
503 /*
504 * Pretend this is a data transfer and rely on the
505 * host driver to compute timeout. When all host
506 * drivers support cmd.cmd_timeout for R1B, this
507 * can be changed to:
508 *
509 * mrq.data = NULL;
510 * cmd.cmd_timeout = idata->ic.cmd_timeout_ms;
511 */
512 data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000;
513 }
514
515 mrq.data = &data;
516 }
517
518 mrq.cmd = &cmd;
519
8d1e977d
LP		 520 err = mmc_blk_part_switch(card, md);
521 if (err)
a5f5774c 522 return err;
8d1e977d 523
cb87ea28
JC		 524 if (idata->ic.is_acmd) {
525 err = mmc_app_cmd(card->host, card);
526 if (err)
a5f5774c 527 return err;
cb87ea28
JC		 528 }
529
8d1e977d
LP		 530 if (is_rpmb) {
531 err = mmc_set_blockcount(card, data.blocks,
532 idata->ic.write_flag & (1 << 31));
533 if (err)
a5f5774c 534 return err;
8d1e977d
LP		 535 }
536
a82e484e
YG		 537 if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) &&
538 (cmd.opcode == MMC_SWITCH)) {
775a9362
ME		 539 err = ioctl_do_sanitize(card);
540
541 if (err)
542 pr_err("%s: ioctl_do_sanitize() failed. err = %d",
543 __func__, err);
544
a5f5774c 545 return err;
775a9362
ME		 546 }
547
cb87ea28
JC		 548 mmc_wait_for_req(card->host, &mrq);
549
550 if (cmd.error) {
551 dev_err(mmc_dev(card->host), "%s: cmd error %d\n",
552 __func__, cmd.error);
a5f5774c 553 return cmd.error;
cb87ea28
JC		 554 }
555 if (data.error) {
556 dev_err(mmc_dev(card->host), "%s: data error %d\n",
557 __func__, data.error);
a5f5774c 558 return data.error;
cb87ea28
JC		 559 }
560
561 /*
562 * According to the SD specs, some commands require a delay after
563 * issuing the command.
564 */
565 if (idata->ic.postsleep_min_us)
566 usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us);
567
a5f5774c 568 memcpy(&(idata->ic.response), cmd.resp, sizeof(cmd.resp));
cb87ea28 569
8d1e977d
LP		 570 if (is_rpmb) {
571 /*
572 * Ensure RPMB command has completed by polling CMD13
573 * "Send Status".
574 */
575 err = ioctl_rpmb_card_status_poll(card, &status, 5);
576 if (err)
577 dev_err(mmc_dev(card->host),
578 "%s: Card Status=0x%08X, error %d\n",
579 __func__, status, err);
580 }
581
a5f5774c
JH		 582 return err;
583}
584
585static int mmc_blk_ioctl_cmd(struct block_device *bdev,
586 struct mmc_ioc_cmd __user *ic_ptr)
587{
588 struct mmc_blk_ioc_data *idata;
589 struct mmc_blk_data *md;
590 struct mmc_card *card;
b093410c 591 int err = 0, ioc_err = 0;
a5f5774c 592
83c742c3
SL		 593 /*
594 * The caller must have CAP_SYS_RAWIO, and must be calling this on the
595 * whole block device, not on a partition. This prevents overspray
596 * between sibling partitions.
597 */
598 if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
599 return -EPERM;
600
a5f5774c
JH		 601 idata = mmc_blk_ioctl_copy_from_user(ic_ptr);
602 if (IS_ERR(idata))
603 return PTR_ERR(idata);
604
605 md = mmc_blk_get(bdev->bd_disk);
606 if (!md) {
607 err = -EINVAL;
608 goto cmd_err;
609 }
610
611 card = md->queue.card;
612 if (IS_ERR(card)) {
613 err = PTR_ERR(card);
614 goto cmd_done;
615 }
616
617 mmc_get_card(card);
618
b093410c 619 ioc_err = __mmc_blk_ioctl_cmd(card, md, idata);
a5f5774c 620
3c866568
AH		 621 /* Always switch back to main area after RPMB access */
622 if (md->area_type & MMC_BLK_DATA_AREA_RPMB)
623 mmc_blk_part_switch(card, dev_get_drvdata(&card->dev));
624
e94cfef6 625 mmc_put_card(card);
cb87ea28 626
b093410c 627 err = mmc_blk_ioctl_copy_to_user(ic_ptr, idata);
a5f5774c 628
cb87ea28
JC		 629cmd_done:
630 mmc_blk_put(md);
1c02f000 631cmd_err:
cb87ea28
JC		 632 kfree(idata->buf);
633 kfree(idata);
b093410c 634 return ioc_err ? ioc_err : err;
cb87ea28
JC		 635}
636
a5f5774c
JH		 637static int mmc_blk_ioctl_multi_cmd(struct block_device *bdev,
638 struct mmc_ioc_multi_cmd __user *user)
639{
640 struct mmc_blk_ioc_data **idata = NULL;
641 struct mmc_ioc_cmd __user *cmds = user->cmds;
642 struct mmc_card *card;
643 struct mmc_blk_data *md;
b093410c 644 int i, err = 0, ioc_err = 0;
a5f5774c
JH		 645 __u64 num_of_cmds;
646
83c742c3
SL		 647 /*
648 * The caller must have CAP_SYS_RAWIO, and must be calling this on the
649 * whole block device, not on a partition. This prevents overspray
650 * between sibling partitions.
651 */
652 if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
653 return -EPERM;
654
a5f5774c
JH		 655 if (copy_from_user(&num_of_cmds, &user->num_of_cmds,
656 sizeof(num_of_cmds)))
657 return -EFAULT;
658
659 if (num_of_cmds > MMC_IOC_MAX_CMDS)
660 return -EINVAL;
661
662 idata = kcalloc(num_of_cmds, sizeof(*idata), GFP_KERNEL);
663 if (!idata)
664 return -ENOMEM;
665
666 for (i = 0; i < num_of_cmds; i++) {
667 idata[i] = mmc_blk_ioctl_copy_from_user(&cmds[i]);
668 if (IS_ERR(idata[i])) {
669 err = PTR_ERR(idata[i]);
670 num_of_cmds = i;
671 goto cmd_err;
672 }
673 }
674
675 md = mmc_blk_get(bdev->bd_disk);
f00ab14c
OJ		 676 if (!md) {
677 err = -EINVAL;
a5f5774c 678 goto cmd_err;
f00ab14c 679 }
a5f5774c
JH		 680
681 card = md->queue.card;
682 if (IS_ERR(card)) {
683 err = PTR_ERR(card);
684 goto cmd_done;
685 }
686
687 mmc_get_card(card);
688
b093410c
GG		 689 for (i = 0; i < num_of_cmds && !ioc_err; i++)
690 ioc_err = __mmc_blk_ioctl_cmd(card, md, idata[i]);
a5f5774c 691
3c866568
AH		 692 /* Always switch back to main area after RPMB access */
693 if (md->area_type & MMC_BLK_DATA_AREA_RPMB)
694 mmc_blk_part_switch(card, dev_get_drvdata(&card->dev));
695
a5f5774c
JH		 696 mmc_put_card(card);
697
698 /* copy to user if data and response */
b093410c 699 for (i = 0; i < num_of_cmds && !err; i++)
a5f5774c 700 err = mmc_blk_ioctl_copy_to_user(&cmds[i], idata[i]);
a5f5774c
JH		 701
702cmd_done:
703 mmc_blk_put(md);
704cmd_err:
705 for (i = 0; i < num_of_cmds; i++) {
706 kfree(idata[i]->buf);
707 kfree(idata[i]);
708 }
709 kfree(idata);
b093410c 710 return ioc_err ? ioc_err : err;
a5f5774c
JH		 711}
712
cb87ea28
JC		 713static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode,
714 unsigned int cmd, unsigned long arg)
715{
a5f5774c
JH		 716 switch (cmd) {
717 case MMC_IOC_CMD:
718 return mmc_blk_ioctl_cmd(bdev,
719 (struct mmc_ioc_cmd __user *)arg);
720 case MMC_IOC_MULTI_CMD:
721 return mmc_blk_ioctl_multi_cmd(bdev,
722 (struct mmc_ioc_multi_cmd __user *)arg);
723 default:
724 return -EINVAL;
725 }
cb87ea28
JC		 726}
727
728#ifdef CONFIG_COMPAT
729static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode,
730 unsigned int cmd, unsigned long arg)
731{
732 return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg));
733}
734#endif
735
83d5cde4 736static const struct block_device_operations mmc_bdops = {
a5a1561f
AV		 737 .open = mmc_blk_open,
738 .release = mmc_blk_release,
a885c8c4 739 .getgeo = mmc_blk_getgeo,
1da177e4 740 .owner = THIS_MODULE,
cb87ea28
JC		 741 .ioctl = mmc_blk_ioctl,
742#ifdef CONFIG_COMPAT
743 .compat_ioctl = mmc_blk_compat_ioctl,
744#endif
1da177e4
LT		 745};
746
371a689f
AW		 747static inline int mmc_blk_part_switch(struct mmc_card *card,
748 struct mmc_blk_data *md)
749{
750 int ret;
fc95e30b 751 struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev);
0d7d85ca 752
371a689f
AW		 753 if (main_md->part_curr == md->part_type)
754 return 0;
755
756 if (mmc_card_mmc(card)) {
0d7d85ca
AH		 757 u8 part_config = card->ext_csd.part_config;
758
57da0c04
AH		 759 if (md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
760 mmc_retune_pause(card->host);
761
0d7d85ca
AH		 762 part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
763 part_config |= md->part_type;
371a689f
AW		 764
765 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
0d7d85ca 766 EXT_CSD_PART_CONFIG, part_config,
371a689f 767 card->ext_csd.part_time);
57da0c04
AH		 768 if (ret) {
769 if (md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
770 mmc_retune_unpause(card->host);
371a689f 771 return ret;
57da0c04 772 }
0d7d85ca
AH		 773
774 card->ext_csd.part_config = part_config;
57da0c04
AH		 775
776 if (main_md->part_curr == EXT_CSD_PART_CONFIG_ACC_RPMB)
777 mmc_retune_unpause(card->host);
67716327 778 }
371a689f
AW		 779
780 main_md->part_curr = md->part_type;
781 return 0;
782}
783
ec5a19dd
PO		 784static u32 mmc_sd_num_wr_blocks(struct mmc_card *card)
785{
786 int err;
051913da
BD		 787 u32 result;
788 __be32 *blocks;
ec5a19dd 789
ad5fd972 790 struct mmc_request mrq = {NULL};
1278dba1 791 struct mmc_command cmd = {0};
a61ad2b4 792 struct mmc_data data = {0};
ec5a19dd
PO		 793
794 struct scatterlist sg;
795
ec5a19dd
PO		 796 cmd.opcode = MMC_APP_CMD;
797 cmd.arg = card->rca << 16;
7213d175 798 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
ec5a19dd
PO		 799
800 err = mmc_wait_for_cmd(card->host, &cmd, 0);
7213d175
DB		 801 if (err)
802 return (u32)-1;
803 if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD))
ec5a19dd
PO		 804 return (u32)-1;
805
806 memset(&cmd, 0, sizeof(struct mmc_command));
807
808 cmd.opcode = SD_APP_SEND_NUM_WR_BLKS;
809 cmd.arg = 0;
7213d175 810 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
ec5a19dd 811
ec5a19dd
PO		 812 data.blksz = 4;
813 data.blocks = 1;
814 data.flags = MMC_DATA_READ;
815 data.sg = &sg;
816 data.sg_len = 1;
d380443c 817 mmc_set_data_timeout(&data, card);
ec5a19dd 818
ec5a19dd
PO		 819 mrq.cmd = &cmd;
820 mrq.data = &data;
821
051913da
BD		 822 blocks = kmalloc(4, GFP_KERNEL);
823 if (!blocks)
824 return (u32)-1;
825
826 sg_init_one(&sg, blocks, 4);
ec5a19dd
PO		 827
828 mmc_wait_for_req(card->host, &mrq);
829
051913da
BD		 830 result = ntohl(*blocks);
831 kfree(blocks);
832
17b0429d 833 if (cmd.error || data.error)
051913da 834 result = (u32)-1;
ec5a19dd 835
051913da 836 return result;
ec5a19dd
PO		 837}
838
0a2d4048 839static int get_card_status(struct mmc_card *card, u32 *status, int retries)
504f191f 840{
1278dba1 841 struct mmc_command cmd = {0};
504f191f
AH		 842 int err;
843
504f191f
AH		 844 cmd.opcode = MMC_SEND_STATUS;
845 if (!mmc_host_is_spi(card->host))
846 cmd.arg = card->rca << 16;
847 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
0a2d4048
RKAL		 848 err = mmc_wait_for_cmd(card->host, &cmd, retries);
849 if (err == 0)
850 *status = cmd.resp[0];
851 return err;
504f191f
AH		 852}
853
c49433fb 854static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms,
95a91298 855 bool hw_busy_detect, struct request *req, int *gen_err)
c49433fb
UH		 856{
857 unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
858 int err = 0;
859 u32 status;
860
861 do {
862 err = get_card_status(card, &status, 5);
863 if (err) {
864 pr_err("%s: error %d requesting status\n",
865 req->rq_disk->disk_name, err);
866 return err;
867 }
868
869 if (status & R1_ERROR) {
870 pr_err("%s: %s: error sending status cmd, status %#x\n",
871 req->rq_disk->disk_name, __func__, status);
872 *gen_err = 1;
873 }
874
95a91298
UH		 875 /* We may rely on the host hw to handle busy detection.*/
876 if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) &&
877 hw_busy_detect)
878 break;
879
c49433fb
UH		 880 /*
881 * Timeout if the device never becomes ready for data and never
882 * leaves the program state.
883 */
884 if (time_after(jiffies, timeout)) {
885 pr_err("%s: Card stuck in programming state! %s %s\n",
886 mmc_hostname(card->host),
887 req->rq_disk->disk_name, __func__);
888 return -ETIMEDOUT;
889 }
890
891 /*
892 * Some cards mishandle the status bits,
893 * so make sure to check both the busy
894 * indication and the card state.
895 */
896 } while (!(status & R1_READY_FOR_DATA) ||
897 (R1_CURRENT_STATE(status) == R1_STATE_PRG));
898
899 return err;
900}
901
bb5cba40
UH		 902static int send_stop(struct mmc_card *card, unsigned int timeout_ms,
903 struct request *req, int *gen_err, u32 *stop_status)
904{
905 struct mmc_host *host = card->host;
906 struct mmc_command cmd = {0};
907 int err;
908 bool use_r1b_resp = rq_data_dir(req) == WRITE;
909
910 /*
911 * Normally we use R1B responses for WRITE, but in cases where the host
912 * has specified a max_busy_timeout we need to validate it. A failure
913 * means we need to prevent the host from doing hw busy detection, which
914 * is done by converting to a R1 response instead.
915 */
916 if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout))
917 use_r1b_resp = false;
918
919 cmd.opcode = MMC_STOP_TRANSMISSION;
920 if (use_r1b_resp) {
921 cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
922 cmd.busy_timeout = timeout_ms;
923 } else {
924 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
925 }
926
927 err = mmc_wait_for_cmd(host, &cmd, 5);
928 if (err)
929 return err;
930
931 *stop_status = cmd.resp[0];
932
933 /* No need to check card status in case of READ. */
934 if (rq_data_dir(req) == READ)
935 return 0;
936
937 if (!mmc_host_is_spi(host) &&
938 (*stop_status & R1_ERROR)) {
939 pr_err("%s: %s: general error sending stop command, resp %#x\n",
940 req->rq_disk->disk_name, __func__, *stop_status);
941 *gen_err = 1;
942 }
943
944 return card_busy_detect(card, timeout_ms, use_r1b_resp, req, gen_err);
945}
946
a8ad82cc 947#define ERR_NOMEDIUM 3
a01f3ccf
RKAL		 948#define ERR_RETRY 2
949#define ERR_ABORT 1
950#define ERR_CONTINUE 0
951
952static int mmc_blk_cmd_error(struct request *req, const char *name, int error,
953 bool status_valid, u32 status)
954{
955 switch (error) {
956 case -EILSEQ:
957 /* response crc error, retry the r/w cmd */
958 pr_err("%s: %s sending %s command, card status %#x\n",
959 req->rq_disk->disk_name, "response CRC error",
960 name, status);
961 return ERR_RETRY;
962
963 case -ETIMEDOUT:
964 pr_err("%s: %s sending %s command, card status %#x\n",
965 req->rq_disk->disk_name, "timed out", name, status);
966
967 /* If the status cmd initially failed, retry the r/w cmd */
cc4d04be
KS		 968 if (!status_valid) {
969 pr_err("%s: status not valid, retrying timeout\n",
970 req->rq_disk->disk_name);
a01f3ccf 971 return ERR_RETRY;
cc4d04be 972 }
a01f3ccf
RKAL		 973
974 /*
975 * If it was a r/w cmd crc error, or illegal command
976 * (eg, issued in wrong state) then retry - we should
977 * have corrected the state problem above.
978 */
cc4d04be
KS		 979 if (status & (R1_COM_CRC_ERROR | R1_ILLEGAL_COMMAND)) {
980 pr_err("%s: command error, retrying timeout\n",
981 req->rq_disk->disk_name);
a01f3ccf 982 return ERR_RETRY;
cc4d04be 983 }
a01f3ccf
RKAL		 984
985 /* Otherwise abort the command */
986 return ERR_ABORT;
987
988 default:
989 /* We don't understand the error code the driver gave us */
990 pr_err("%s: unknown error %d sending read/write command, card status %#x\n",
991 req->rq_disk->disk_name, error, status);
992 return ERR_ABORT;
993 }
994}
995
996/*
997 * Initial r/w and stop cmd error recovery.
998 * We don't know whether the card received the r/w cmd or not, so try to
999 * restore things back to a sane state. Essentially, we do this as follows:
1000 * - Obtain card status. If the first attempt to obtain card status fails,
1001 * the status word will reflect the failed status cmd, not the failed
1002 * r/w cmd. If we fail to obtain card status, it suggests we can no
1003 * longer communicate with the card.
1004 * - Check the card state. If the card received the cmd but there was a
1005 * transient problem with the response, it might still be in a data transfer
1006 * mode. Try to send it a stop command. If this fails, we can't recover.
1007 * - If the r/w cmd failed due to a response CRC error, it was probably
1008 * transient, so retry the cmd.
1009 * - If the r/w cmd timed out, but we didn't get the r/w cmd status, retry.
1010 * - If the r/w cmd timed out, and the r/w cmd failed due to CRC error or
1011 * illegal cmd, retry.
1012 * Otherwise we don't understand what happened, so abort.
1013 */
1014static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req,
c8760069 1015 struct mmc_blk_request *brq, int *ecc_err, int *gen_err)
a01f3ccf
RKAL		 1016{
1017 bool prev_cmd_status_valid = true;
1018 u32 status, stop_status = 0;
1019 int err, retry;
1020
a8ad82cc
SRT		 1021 if (mmc_card_removed(card))
1022 return ERR_NOMEDIUM;
1023
a01f3ccf
RKAL		 1024 /*
1025 * Try to get card status which indicates both the card state
1026 * and why there was no response. If the first attempt fails,
1027 * we can't be sure the returned status is for the r/w command.
1028 */
1029 for (retry = 2; retry >= 0; retry--) {
1030 err = get_card_status(card, &status, 0);
1031 if (!err)
1032 break;
1033
6f398ad2
AH		 1034 /* Re-tune if needed */
1035 mmc_retune_recheck(card->host);
1036
a01f3ccf
RKAL		 1037 prev_cmd_status_valid = false;
1038 pr_err("%s: error %d sending status command, %sing\n",
1039 req->rq_disk->disk_name, err, retry ? "retry" : "abort");
1040 }
1041
1042 /* We couldn't get a response from the card. Give up. */
a8ad82cc
SRT		 1043 if (err) {
1044 /* Check if the card is removed */
1045 if (mmc_detect_card_removed(card->host))
1046 return ERR_NOMEDIUM;
a01f3ccf 1047 return ERR_ABORT;
a8ad82cc 1048 }
a01f3ccf 1049
67716327
AH		 1050 /* Flag ECC errors */
1051 if ((status & R1_CARD_ECC_FAILED) ||
1052 (brq->stop.resp[0] & R1_CARD_ECC_FAILED) ||
1053 (brq->cmd.resp[0] & R1_CARD_ECC_FAILED))
1054 *ecc_err = 1;
1055
c8760069
KY		 1056 /* Flag General errors */
1057 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ)
1058 if ((status & R1_ERROR) ||
1059 (brq->stop.resp[0] & R1_ERROR)) {
1060 pr_err("%s: %s: general error sending stop or status command, stop cmd response %#x, card status %#x\n",
1061 req->rq_disk->disk_name, __func__,
1062 brq->stop.resp[0], status);
1063 *gen_err = 1;
1064 }
1065
a01f3ccf
RKAL		 1066 /*
1067 * Check the current card state. If it is in some data transfer
1068 * mode, tell it to stop (and hopefully transition back to TRAN.)
1069 */
1070 if (R1_CURRENT_STATE(status) == R1_STATE_DATA ||
1071 R1_CURRENT_STATE(status) == R1_STATE_RCV) {
bb5cba40
UH		 1072 err = send_stop(card,
1073 DIV_ROUND_UP(brq->data.timeout_ns, 1000000),
1074 req, gen_err, &stop_status);
1075 if (err) {
a01f3ccf
RKAL		 1076 pr_err("%s: error %d sending stop command\n",
1077 req->rq_disk->disk_name, err);
bb5cba40
UH		 1078 /*
1079 * If the stop cmd also timed out, the card is probably
1080 * not present, so abort. Other errors are bad news too.
1081 */
a01f3ccf 1082 return ERR_ABORT;
bb5cba40
UH		 1083 }
1084
67716327
AH		 1085 if (stop_status & R1_CARD_ECC_FAILED)
1086 *ecc_err = 1;
a01f3ccf
RKAL		 1087 }
1088
1089 /* Check for set block count errors */
1090 if (brq->sbc.error)
1091 return mmc_blk_cmd_error(req, "SET_BLOCK_COUNT", brq->sbc.error,
1092 prev_cmd_status_valid, status);
1093
1094 /* Check for r/w command errors */
1095 if (brq->cmd.error)
1096 return mmc_blk_cmd_error(req, "r/w cmd", brq->cmd.error,
1097 prev_cmd_status_valid, status);
1098
67716327
AH		 1099 /* Data errors */
1100 if (!brq->stop.error)
1101 return ERR_CONTINUE;
1102
a01f3ccf 1103 /* Now for stop errors. These aren't fatal to the transfer. */
5e1344eb 1104 pr_info("%s: error %d sending stop command, original cmd response %#x, card status %#x\n",
a01f3ccf
RKAL		 1105 req->rq_disk->disk_name, brq->stop.error,
1106 brq->cmd.resp[0], status);
1107
1108 /*
1109 * Subsitute in our own stop status as this will give the error
1110 * state which happened during the execution of the r/w command.
1111 */
1112 if (stop_status) {
1113 brq->stop.resp[0] = stop_status;
1114 brq->stop.error = 0;
1115 }
1116 return ERR_CONTINUE;
1117}
1118
67716327
AH		 1119static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host,
1120 int type)
1121{
1122 int err;
1123
1124 if (md->reset_done & type)
1125 return -EEXIST;
1126
1127 md->reset_done |= type;
1128 err = mmc_hw_reset(host);
1129 /* Ensure we switch back to the correct partition */
1130 if (err != -EOPNOTSUPP) {
fc95e30b
UH		 1131 struct mmc_blk_data *main_md =
1132 dev_get_drvdata(&host->card->dev);
67716327
AH		 1133 int part_err;
1134
1135 main_md->part_curr = main_md->part_type;
1136 part_err = mmc_blk_part_switch(host->card, md);
1137 if (part_err) {
1138 /*
1139 * We have failed to get back into the correct
1140 * partition, so we need to abort the whole request.
1141 */
1142 return -ENODEV;
1143 }
1144 }
1145 return err;
1146}
1147
1148static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type)
1149{
1150 md->reset_done &= ~type;
1151}
1152
4e93b9a6
CD		 1153int mmc_access_rpmb(struct mmc_queue *mq)
1154{
1155 struct mmc_blk_data *md = mq->data;
1156 /*
1157 * If this is a RPMB partition access, return ture
1158 */
1159 if (md && md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
1160 return true;
1161
1162 return false;
1163}
1164
bd788c96
AH		 1165static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
1166{
1167 struct mmc_blk_data *md = mq->data;
1168 struct mmc_card *card = md->queue.card;
1169 unsigned int from, nr, arg;
67716327 1170 int err = 0, type = MMC_BLK_DISCARD;
bd788c96 1171
bd788c96
AH		 1172 if (!mmc_can_erase(card)) {
1173 err = -EOPNOTSUPP;
1174 goto out;
1175 }
1176
1177 from = blk_rq_pos(req);
1178 nr = blk_rq_sectors(req);
1179
b3bf9153
KP		 1180 if (mmc_can_discard(card))
1181 arg = MMC_DISCARD_ARG;
1182 else if (mmc_can_trim(card))
bd788c96
AH		 1183 arg = MMC_TRIM_ARG;
1184 else
1185 arg = MMC_ERASE_ARG;
67716327 1186retry:
6a7a6b45
AW		 1187 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1188 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1189 INAND_CMD38_ARG_EXT_CSD,
1190 arg == MMC_TRIM_ARG ?
1191 INAND_CMD38_ARG_TRIM :
1192 INAND_CMD38_ARG_ERASE,
1193 0);
1194 if (err)
1195 goto out;
1196 }
bd788c96
AH		 1197 err = mmc_erase(card, from, nr, arg);
1198out:
67716327
AH		 1199 if (err == -EIO && !mmc_blk_reset(md, card->host, type))
1200 goto retry;
1201 if (!err)
1202 mmc_blk_reset_success(md, type);
ecf8b5d0 1203 blk_end_request(req, err, blk_rq_bytes(req));
bd788c96 1204
bd788c96
AH		 1205 return err ? 0 : 1;
1206}
1207
49804548
AH		 1208static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
1209 struct request *req)
1210{
1211 struct mmc_blk_data *md = mq->data;
1212 struct mmc_card *card = md->queue.card;
775a9362 1213 unsigned int from, nr, arg;
67716327 1214 int err = 0, type = MMC_BLK_SECDISCARD;
49804548 1215
775a9362 1216 if (!(mmc_can_secure_erase_trim(card))) {
49804548
AH		 1217 err = -EOPNOTSUPP;
1218 goto out;
1219 }
1220
28302812
AH		 1221 from = blk_rq_pos(req);
1222 nr = blk_rq_sectors(req);
1223
775a9362
ME		 1224 if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr))
1225 arg = MMC_SECURE_TRIM1_ARG;
1226 else
1227 arg = MMC_SECURE_ERASE_ARG;
d9ddd629 1228
67716327 1229retry:
6a7a6b45
AW		 1230 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1231 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1232 INAND_CMD38_ARG_EXT_CSD,
1233 arg == MMC_SECURE_TRIM1_ARG ?
1234 INAND_CMD38_ARG_SECTRIM1 :
1235 INAND_CMD38_ARG_SECERASE,
1236 0);
1237 if (err)
28302812 1238 goto out_retry;
6a7a6b45 1239 }
28302812 1240
49804548 1241 err = mmc_erase(card, from, nr, arg);
28302812
AH		 1242 if (err == -EIO)
1243 goto out_retry;
1244 if (err)
1245 goto out;
1246
1247 if (arg == MMC_SECURE_TRIM1_ARG) {
6a7a6b45
AW		 1248 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1249 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1250 INAND_CMD38_ARG_EXT_CSD,
1251 INAND_CMD38_ARG_SECTRIM2,
1252 0);
1253 if (err)
28302812 1254 goto out_retry;
6a7a6b45 1255 }
28302812 1256
49804548 1257 err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG);
28302812
AH		 1258 if (err == -EIO)
1259 goto out_retry;
1260 if (err)
1261 goto out;
6a7a6b45 1262 }
28302812 1263
28302812
AH		 1264out_retry:
1265 if (err && !mmc_blk_reset(md, card->host, type))
67716327
AH		 1266 goto retry;
1267 if (!err)
1268 mmc_blk_reset_success(md, type);
28302812 1269out:
ecf8b5d0 1270 blk_end_request(req, err, blk_rq_bytes(req));
49804548 1271
49804548
AH		 1272 return err ? 0 : 1;
1273}
1274
f4c5522b
AW		 1275static int mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req)
1276{
1277 struct mmc_blk_data *md = mq->data;
881d1c25
SJ		 1278 struct mmc_card *card = md->queue.card;
1279 int ret = 0;
1280
1281 ret = mmc_flush_cache(card);
1282 if (ret)
1283 ret = -EIO;
f4c5522b 1284
ecf8b5d0 1285 blk_end_request_all(req, ret);
f4c5522b 1286
881d1c25 1287 return ret ? 0 : 1;
f4c5522b
AW		 1288}
1289
1290/*
1291 * Reformat current write as a reliable write, supporting
1292 * both legacy and the enhanced reliable write MMC cards.
1293 * In each transfer we'll handle only as much as a single
1294 * reliable write can handle, thus finish the request in
1295 * partial completions.
1296 */
d0c97cfb
AW		 1297static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq,
1298 struct mmc_card *card,
1299 struct request *req)
f4c5522b 1300{
f4c5522b
AW		 1301 if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) {
1302 /* Legacy mode imposes restrictions on transfers. */
1303 if (!IS_ALIGNED(brq->cmd.arg, card->ext_csd.rel_sectors))
1304 brq->data.blocks = 1;
1305
1306 if (brq->data.blocks > card->ext_csd.rel_sectors)
1307 brq->data.blocks = card->ext_csd.rel_sectors;
1308 else if (brq->data.blocks < card->ext_csd.rel_sectors)
1309 brq->data.blocks = 1;
1310 }
f4c5522b
AW		 1311}
1312
4c2b8f26
RKAL		 1313#define CMD_ERRORS \
1314 (R1_OUT_OF_RANGE | /* Command argument out of range */ \
1315 R1_ADDRESS_ERROR | /* Misaligned address */ \
1316 R1_BLOCK_LEN_ERROR | /* Transferred block length incorrect */\
1317 R1_WP_VIOLATION | /* Tried to write to protected block */ \
1318 R1_CC_ERROR | /* Card controller error */ \
1319 R1_ERROR) /* General/unknown error */
1320
ee8a43a5
PF		 1321static int mmc_blk_err_check(struct mmc_card *card,
1322 struct mmc_async_req *areq)
d78d4a8a 1323{
ee8a43a5
PF		 1324 struct mmc_queue_req *mq_mrq = container_of(areq, struct mmc_queue_req,
1325 mmc_active);
1326 struct mmc_blk_request *brq = &mq_mrq->brq;
1327 struct request *req = mq_mrq->req;
b8360a49 1328 int need_retune = card->host->need_retune;
c8760069 1329 int ecc_err = 0, gen_err = 0;
d78d4a8a
PF		 1330
1331 /*
1332 * sbc.error indicates a problem with the set block count
1333 * command. No data will have been transferred.
1334 *
1335 * cmd.error indicates a problem with the r/w command. No
1336 * data will have been transferred.
1337 *
1338 * stop.error indicates a problem with the stop command. Data
1339 * may have been transferred, or may still be transferring.
1340 */
67716327
AH		 1341 if (brq->sbc.error || brq->cmd.error || brq->stop.error ||
1342 brq->data.error) {
c8760069 1343 switch (mmc_blk_cmd_recovery(card, req, brq, &ecc_err, &gen_err)) {
d78d4a8a
PF		 1344 case ERR_RETRY:
1345 return MMC_BLK_RETRY;
1346 case ERR_ABORT:
1347 return MMC_BLK_ABORT;
a8ad82cc
SRT		 1348 case ERR_NOMEDIUM:
1349 return MMC_BLK_NOMEDIUM;
d78d4a8a
PF		 1350 case ERR_CONTINUE:
1351 break;
1352 }
1353 }
1354
1355 /*
1356 * Check for errors relating to the execution of the
1357 * initial command - such as address errors. No data
1358 * has been transferred.
1359 */
1360 if (brq->cmd.resp[0] & CMD_ERRORS) {
1361 pr_err("%s: r/w command failed, status = %#x\n",
1362 req->rq_disk->disk_name, brq->cmd.resp[0]);
1363 return MMC_BLK_ABORT;
1364 }
1365
1366 /*
1367 * Everything else is either success, or a data error of some
1368 * kind. If it was a write, we may have transitioned to
1369 * program mode, which we have to wait for it to complete.
1370 */
1371 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) {
c49433fb 1372 int err;
8fee476b 1373
c8760069
KY		 1374 /* Check stop command response */
1375 if (brq->stop.resp[0] & R1_ERROR) {
1376 pr_err("%s: %s: general error sending stop command, stop cmd response %#x\n",
1377 req->rq_disk->disk_name, __func__,
1378 brq->stop.resp[0]);
1379 gen_err = 1;
1380 }
1381
95a91298
UH		 1382 err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, false, req,
1383 &gen_err);
c49433fb
UH		 1384 if (err)
1385 return MMC_BLK_CMD_ERR;
d78d4a8a
PF		 1386 }
1387
c8760069
KY		 1388 /* if general error occurs, retry the write operation. */
1389 if (gen_err) {
1390 pr_warn("%s: retrying write for general error\n",
1391 req->rq_disk->disk_name);
1392 return MMC_BLK_RETRY;
1393 }
1394
d78d4a8a 1395 if (brq->data.error) {
b8360a49 1396 if (need_retune && !brq->retune_retry_done) {
09faf61d
RK		 1397 pr_debug("%s: retrying because a re-tune was needed\n",
1398 req->rq_disk->disk_name);
b8360a49
AH		 1399 brq->retune_retry_done = 1;
1400 return MMC_BLK_RETRY;
1401 }
d78d4a8a
PF		 1402 pr_err("%s: error %d transferring data, sector %u, nr %u, cmd response %#x, card status %#x\n",
1403 req->rq_disk->disk_name, brq->data.error,
1404 (unsigned)blk_rq_pos(req),
1405 (unsigned)blk_rq_sectors(req),
1406 brq->cmd.resp[0], brq->stop.resp[0]);
1407
1408 if (rq_data_dir(req) == READ) {
67716327
AH		 1409 if (ecc_err)
1410 return MMC_BLK_ECC_ERR;
d78d4a8a
PF		 1411 return MMC_BLK_DATA_ERR;
1412 } else {
1413 return MMC_BLK_CMD_ERR;
1414 }
1415 }
1416
67716327
AH		 1417 if (!brq->data.bytes_xfered)
1418 return MMC_BLK_RETRY;
d78d4a8a 1419
ce39f9d1
SJ		 1420 if (mmc_packed_cmd(mq_mrq->cmd_type)) {
1421 if (unlikely(brq->data.blocks << 9 != brq->data.bytes_xfered))
1422 return MMC_BLK_PARTIAL;
1423 else
1424 return MMC_BLK_SUCCESS;
1425 }
1426
67716327
AH		 1427 if (blk_rq_bytes(req) != brq->data.bytes_xfered)
1428 return MMC_BLK_PARTIAL;
1429
1430 return MMC_BLK_SUCCESS;
d78d4a8a
PF		 1431}
1432
ce39f9d1
SJ		 1433static int mmc_blk_packed_err_check(struct mmc_card *card,
1434 struct mmc_async_req *areq)
1435{
1436 struct mmc_queue_req *mq_rq = container_of(areq, struct mmc_queue_req,
1437 mmc_active);
1438 struct request *req = mq_rq->req;
1439 struct mmc_packed *packed = mq_rq->packed;
1440 int err, check, status;
1441 u8 *ext_csd;
1442
1443 BUG_ON(!packed);
1444
1445 packed->retries--;
1446 check = mmc_blk_err_check(card, areq);
1447 err = get_card_status(card, &status, 0);
1448 if (err) {
1449 pr_err("%s: error %d sending status command\n",
1450 req->rq_disk->disk_name, err);
1451 return MMC_BLK_ABORT;
1452 }
1453
1454 if (status & R1_EXCEPTION_EVENT) {
86817ffb 1455 err = mmc_get_ext_csd(card, &ext_csd);
ce39f9d1
SJ		 1456 if (err) {
1457 pr_err("%s: error %d sending ext_csd\n",
1458 req->rq_disk->disk_name, err);
86817ffb 1459 return MMC_BLK_ABORT;
ce39f9d1
SJ		 1460 }
1461
1462 if ((ext_csd[EXT_CSD_EXP_EVENTS_STATUS] &
1463 EXT_CSD_PACKED_FAILURE) &&
1464 (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1465 EXT_CSD_PACKED_GENERIC_ERROR)) {
1466 if (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1467 EXT_CSD_PACKED_INDEXED_ERROR) {
1468 packed->idx_failure =
1469 ext_csd[EXT_CSD_PACKED_FAILURE_INDEX] - 1;
1470 check = MMC_BLK_PARTIAL;
1471 }
1472 pr_err("%s: packed cmd failed, nr %u, sectors %u, "
1473 "failure index: %d\n",
1474 req->rq_disk->disk_name, packed->nr_entries,
1475 packed->blocks, packed->idx_failure);
1476 }
ce39f9d1
SJ		 1477 kfree(ext_csd);
1478 }
1479
1480 return check;
1481}
1482
54d49d77
PF		 1483static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
1484 struct mmc_card *card,
1485 int disable_multi,
1486 struct mmc_queue *mq)
1da177e4 1487{
54d49d77
PF		 1488 u32 readcmd, writecmd;
1489 struct mmc_blk_request *brq = &mqrq->brq;
1490 struct request *req = mqrq->req;
1da177e4 1491 struct mmc_blk_data *md = mq->data;
4265900e 1492 bool do_data_tag;
1da177e4 1493
f4c5522b
AW		 1494 /*
1495 * Reliable writes are used to implement Forced Unit Access and
d3df0465 1496 * are supported only on MMCs.
f4c5522b 1497 */
d3df0465 1498 bool do_rel_wr = (req->cmd_flags & REQ_FUA) &&
f4c5522b 1499 (rq_data_dir(req) == WRITE) &&
d0c97cfb 1500 (md->flags & MMC_BLK_REL_WR);
f4c5522b 1501
54d49d77
PF		 1502 memset(brq, 0, sizeof(struct mmc_blk_request));
1503 brq->mrq.cmd = &brq->cmd;
1504 brq->mrq.data = &brq->data;
1da177e4 1505
54d49d77
PF		 1506 brq->cmd.arg = blk_rq_pos(req);
1507 if (!mmc_card_blockaddr(card))
1508 brq->cmd.arg <<= 9;
1509 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1510 brq->data.blksz = 512;
1511 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1512 brq->stop.arg = 0;
54d49d77 1513 brq->data.blocks = blk_rq_sectors(req);
6a79e391 1514
54d49d77
PF		 1515 /*
1516 * The block layer doesn't support all sector count
1517 * restrictions, so we need to be prepared for too big
1518 * requests.
1519 */
1520 if (brq->data.blocks > card->host->max_blk_count)
1521 brq->data.blocks = card->host->max_blk_count;
1da177e4 1522
2bf22b39
PW		 1523 if (brq->data.blocks > 1) {
1524 /*
1525 * After a read error, we redo the request one sector
1526 * at a time in order to accurately determine which
1527 * sectors can be read successfully.
1528 */
1529 if (disable_multi)
1530 brq->data.blocks = 1;
1531
2e47e842
KM		 1532 /*
1533 * Some controllers have HW issues while operating
1534 * in multiple I/O mode
1535 */
1536 if (card->host->ops->multi_io_quirk)
1537 brq->data.blocks = card->host->ops->multi_io_quirk(card,
1538 (rq_data_dir(req) == READ) ?
1539 MMC_DATA_READ : MMC_DATA_WRITE,
1540 brq->data.blocks);
2bf22b39 1541 }
d0c97cfb 1542
54d49d77
PF		 1543 if (brq->data.blocks > 1 || do_rel_wr) {
1544 /* SPI multiblock writes terminate using a special
1545 * token, not a STOP_TRANSMISSION request.
d0c97cfb 1546 */
54d49d77
PF		 1547 if (!mmc_host_is_spi(card->host) ||
1548 rq_data_dir(req) == READ)
1549 brq->mrq.stop = &brq->stop;
1550 readcmd = MMC_READ_MULTIPLE_BLOCK;
1551 writecmd = MMC_WRITE_MULTIPLE_BLOCK;
1552 } else {
1553 brq->mrq.stop = NULL;
1554 readcmd = MMC_READ_SINGLE_BLOCK;
1555 writecmd = MMC_WRITE_BLOCK;
1556 }
1557 if (rq_data_dir(req) == READ) {
1558 brq->cmd.opcode = readcmd;
f53f1102 1559 brq->data.flags = MMC_DATA_READ;
bcc3e172
UH		 1560 if (brq->mrq.stop)
1561 brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 |
1562 MMC_CMD_AC;
54d49d77
PF		 1563 } else {
1564 brq->cmd.opcode = writecmd;
f53f1102 1565 brq->data.flags = MMC_DATA_WRITE;
bcc3e172
UH		 1566 if (brq->mrq.stop)
1567 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B |
1568 MMC_CMD_AC;
54d49d77 1569 }
d0c97cfb 1570
54d49d77
PF		 1571 if (do_rel_wr)
1572 mmc_apply_rel_rw(brq, card, req);
f4c5522b 1573
4265900e
SD		 1574 /*
1575 * Data tag is used only during writing meta data to speed
1576 * up write and any subsequent read of this meta data
1577 */
1578 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1579 (req->cmd_flags & REQ_META) &&
1580 (rq_data_dir(req) == WRITE) &&
1581 ((brq->data.blocks * brq->data.blksz) >=
1582 card->ext_csd.data_tag_unit_size);
1583
54d49d77
PF		 1584 /*
1585 * Pre-defined multi-block transfers are preferable to
1586 * open ended-ones (and necessary for reliable writes).
1587 * However, it is not sufficient to just send CMD23,
1588 * and avoid the final CMD12, as on an error condition
1589 * CMD12 (stop) needs to be sent anyway. This, coupled
1590 * with Auto-CMD23 enhancements provided by some
1591 * hosts, means that the complexity of dealing
1592 * with this is best left to the host. If CMD23 is
1593 * supported by card and host, we'll fill sbc in and let
1594 * the host deal with handling it correctly. This means
1595 * that for hosts that don't expose MMC_CAP_CMD23, no
1596 * change of behavior will be observed.
1597 *
1598 * N.B: Some MMC cards experience perf degradation.
1599 * We'll avoid using CMD23-bounded multiblock writes for
1600 * these, while retaining features like reliable writes.
1601 */
4265900e
SD		 1602 if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) &&
1603 (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) ||
1604 do_data_tag)) {
54d49d77
PF		 1605 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1606 brq->sbc.arg = brq->data.blocks |
4265900e
SD		 1607 (do_rel_wr ? (1 << 31) : 0) |
1608 (do_data_tag ? (1 << 29) : 0);
54d49d77
PF		 1609 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1610 brq->mrq.sbc = &brq->sbc;
1611 }
98ccf149 1612
54d49d77
PF		 1613 mmc_set_data_timeout(&brq->data, card);
1614
1615 brq->data.sg = mqrq->sg;
1616 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1617
1618 /*
1619 * Adjust the sg list so it is the same size as the
1620 * request.
1621 */
1622 if (brq->data.blocks != blk_rq_sectors(req)) {
1623 int i, data_size = brq->data.blocks << 9;
1624 struct scatterlist *sg;
1625
1626 for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) {
1627 data_size -= sg->length;
1628 if (data_size <= 0) {
1629 sg->length += data_size;
1630 i++;
1631 break;
6a79e391 1632 }
6a79e391 1633 }
54d49d77
PF		 1634 brq->data.sg_len = i;
1635 }
1636
ee8a43a5
PF		 1637 mqrq->mmc_active.mrq = &brq->mrq;
1638 mqrq->mmc_active.err_check = mmc_blk_err_check;
1639
54d49d77
PF		 1640 mmc_queue_bounce_pre(mqrq);
1641}
6a79e391 1642
ce39f9d1
SJ		 1643static inline u8 mmc_calc_packed_hdr_segs(struct request_queue *q,
1644 struct mmc_card *card)
1645{
1646 unsigned int hdr_sz = mmc_large_sector(card) ? 4096 : 512;
1647 unsigned int max_seg_sz = queue_max_segment_size(q);
1648 unsigned int len, nr_segs = 0;
1649
1650 do {
1651 len = min(hdr_sz, max_seg_sz);
1652 hdr_sz -= len;
1653 nr_segs++;
1654 } while (hdr_sz);
1655
1656 return nr_segs;
1657}
1658
1659static u8 mmc_blk_prep_packed_list(struct mmc_queue *mq, struct request *req)
1660{
1661 struct request_queue *q = mq->queue;
1662 struct mmc_card *card = mq->card;
1663 struct request *cur = req, *next = NULL;
1664 struct mmc_blk_data *md = mq->data;
1665 struct mmc_queue_req *mqrq = mq->mqrq_cur;
1666 bool en_rel_wr = card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN;
1667 unsigned int req_sectors = 0, phys_segments = 0;
1668 unsigned int max_blk_count, max_phys_segs;
1669 bool put_back = true;
1670 u8 max_packed_rw = 0;
1671 u8 reqs = 0;
1672
1673 if (!(md->flags & MMC_BLK_PACKED_CMD))
1674 goto no_packed;
1675
1676 if ((rq_data_dir(cur) == WRITE) &&
1677 mmc_host_packed_wr(card->host))
1678 max_packed_rw = card->ext_csd.max_packed_writes;
1679
1680 if (max_packed_rw == 0)
1681 goto no_packed;
1682
1683 if (mmc_req_rel_wr(cur) &&
1684 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1685 goto no_packed;
1686
1687 if (mmc_large_sector(card) &&
1688 !IS_ALIGNED(blk_rq_sectors(cur), 8))
1689 goto no_packed;
1690
1691 mmc_blk_clear_packed(mqrq);
1692
1693 max_blk_count = min(card->host->max_blk_count,
1694 card->host->max_req_size >> 9);
1695 if (unlikely(max_blk_count > 0xffff))
1696 max_blk_count = 0xffff;
1697
1698 max_phys_segs = queue_max_segments(q);
1699 req_sectors += blk_rq_sectors(cur);
1700 phys_segments += cur->nr_phys_segments;
1701
1702 if (rq_data_dir(cur) == WRITE) {
1703 req_sectors += mmc_large_sector(card) ? 8 : 1;
1704 phys_segments += mmc_calc_packed_hdr_segs(q, card);
1705 }
1706
1707 do {
1708 if (reqs >= max_packed_rw - 1) {
1709 put_back = false;
1710 break;
1711 }
1712
1713 spin_lock_irq(q->queue_lock);
1714 next = blk_fetch_request(q);
1715 spin_unlock_irq(q->queue_lock);
1716 if (!next) {
1717 put_back = false;
1718 break;
1719 }
1720
1721 if (mmc_large_sector(card) &&
1722 !IS_ALIGNED(blk_rq_sectors(next), 8))
1723 break;
1724
c2df40df 1725 if (req_op(next) == REQ_OP_DISCARD || next->cmd_flags & REQ_FLUSH)
ce39f9d1
SJ		 1726 break;
1727
1728 if (rq_data_dir(cur) != rq_data_dir(next))
1729 break;
1730
1731 if (mmc_req_rel_wr(next) &&
1732 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1733 break;
1734
1735 req_sectors += blk_rq_sectors(next);
1736 if (req_sectors > max_blk_count)
1737 break;
1738
1739 phys_segments += next->nr_phys_segments;
1740 if (phys_segments > max_phys_segs)
1741 break;
1742
1743 list_add_tail(&next->queuelist, &mqrq->packed->list);
1744 cur = next;
1745 reqs++;
1746 } while (1);
1747
1748 if (put_back) {
1749 spin_lock_irq(q->queue_lock);
1750 blk_requeue_request(q, next);
1751 spin_unlock_irq(q->queue_lock);
1752 }
1753
1754 if (reqs > 0) {
1755 list_add(&req->queuelist, &mqrq->packed->list);
1756 mqrq->packed->nr_entries = ++reqs;
1757 mqrq->packed->retries = reqs;
1758 return reqs;
1759 }
1760
1761no_packed:
1762 mqrq->cmd_type = MMC_PACKED_NONE;
1763 return 0;
1764}
1765
1766static void mmc_blk_packed_hdr_wrq_prep(struct mmc_queue_req *mqrq,
1767 struct mmc_card *card,
1768 struct mmc_queue *mq)
1769{
1770 struct mmc_blk_request *brq = &mqrq->brq;
1771 struct request *req = mqrq->req;
1772 struct request *prq;
1773 struct mmc_blk_data *md = mq->data;
1774 struct mmc_packed *packed = mqrq->packed;
1775 bool do_rel_wr, do_data_tag;
1776 u32 *packed_cmd_hdr;
1777 u8 hdr_blocks;
1778 u8 i = 1;
1779
1780 BUG_ON(!packed);
1781
1782 mqrq->cmd_type = MMC_PACKED_WRITE;
1783 packed->blocks = 0;
1784 packed->idx_failure = MMC_PACKED_NR_IDX;
1785
1786 packed_cmd_hdr = packed->cmd_hdr;
1787 memset(packed_cmd_hdr, 0, sizeof(packed->cmd_hdr));
1788 packed_cmd_hdr[0] = (packed->nr_entries << 16) |
1789 (PACKED_CMD_WR << 8) | PACKED_CMD_VER;
1790 hdr_blocks = mmc_large_sector(card) ? 8 : 1;
1791
1792 /*
1793 * Argument for each entry of packed group
1794 */
1795 list_for_each_entry(prq, &packed->list, queuelist) {
1796 do_rel_wr = mmc_req_rel_wr(prq) && (md->flags & MMC_BLK_REL_WR);
1797 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1798 (prq->cmd_flags & REQ_META) &&
1799 (rq_data_dir(prq) == WRITE) &&
1800 ((brq->data.blocks * brq->data.blksz) >=
1801 card->ext_csd.data_tag_unit_size);
1802 /* Argument of CMD23 */
1803 packed_cmd_hdr[(i * 2)] =
1804 (do_rel_wr ? MMC_CMD23_ARG_REL_WR : 0) |
1805 (do_data_tag ? MMC_CMD23_ARG_TAG_REQ : 0) |
1806 blk_rq_sectors(prq);
1807 /* Argument of CMD18 or CMD25 */
1808 packed_cmd_hdr[((i * 2)) + 1] =
1809 mmc_card_blockaddr(card) ?
1810 blk_rq_pos(prq) : blk_rq_pos(prq) << 9;
1811 packed->blocks += blk_rq_sectors(prq);
1812 i++;
1813 }
1814
1815 memset(brq, 0, sizeof(struct mmc_blk_request));
1816 brq->mrq.cmd = &brq->cmd;
1817 brq->mrq.data = &brq->data;
1818 brq->mrq.sbc = &brq->sbc;
1819 brq->mrq.stop = &brq->stop;
1820
1821 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1822 brq->sbc.arg = MMC_CMD23_ARG_PACKED | (packed->blocks + hdr_blocks);
1823 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1824
1825 brq->cmd.opcode = MMC_WRITE_MULTIPLE_BLOCK;
1826 brq->cmd.arg = blk_rq_pos(req);
1827 if (!mmc_card_blockaddr(card))
1828 brq->cmd.arg <<= 9;
1829 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1830
1831 brq->data.blksz = 512;
1832 brq->data.blocks = packed->blocks + hdr_blocks;
f53f1102 1833 brq->data.flags = MMC_DATA_WRITE;
ce39f9d1
SJ		 1834
1835 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1836 brq->stop.arg = 0;
1837 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
1838
1839 mmc_set_data_timeout(&brq->data, card);
1840
1841 brq->data.sg = mqrq->sg;
1842 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1843
1844 mqrq->mmc_active.mrq = &brq->mrq;
1845 mqrq->mmc_active.err_check = mmc_blk_packed_err_check;
1846
1847 mmc_queue_bounce_pre(mqrq);
1848}
1849
67716327
AH		 1850static int mmc_blk_cmd_err(struct mmc_blk_data *md, struct mmc_card *card,
1851 struct mmc_blk_request *brq, struct request *req,
1852 int ret)
1853{
ce39f9d1
SJ		 1854 struct mmc_queue_req *mq_rq;
1855 mq_rq = container_of(brq, struct mmc_queue_req, brq);
1856
67716327
AH		 1857 /*
1858 * If this is an SD card and we're writing, we can first
1859 * mark the known good sectors as ok.
1860 *
1861 * If the card is not SD, we can still ok written sectors
1862 * as reported by the controller (which might be less than
1863 * the real number of written sectors, but never more).
1864 */
1865 if (mmc_card_sd(card)) {
1866 u32 blocks;
1867
1868 blocks = mmc_sd_num_wr_blocks(card);
1869 if (blocks != (u32)-1) {
ecf8b5d0 1870 ret = blk_end_request(req, 0, blocks << 9);
67716327
AH		 1871 }
1872 } else {
ce39f9d1
SJ		 1873 if (!mmc_packed_cmd(mq_rq->cmd_type))
1874 ret = blk_end_request(req, 0, brq->data.bytes_xfered);
67716327
AH		 1875 }
1876 return ret;
1877}
1878
ce39f9d1
SJ		 1879static int mmc_blk_end_packed_req(struct mmc_queue_req *mq_rq)
1880{
1881 struct request *prq;
1882 struct mmc_packed *packed = mq_rq->packed;
1883 int idx = packed->idx_failure, i = 0;
1884 int ret = 0;
1885
1886 BUG_ON(!packed);
1887
1888 while (!list_empty(&packed->list)) {
1889 prq = list_entry_rq(packed->list.next);
1890 if (idx == i) {
1891 /* retry from error index */
1892 packed->nr_entries -= idx;
1893 mq_rq->req = prq;
1894 ret = 1;
1895
1896 if (packed->nr_entries == MMC_PACKED_NR_SINGLE) {
1897 list_del_init(&prq->queuelist);
1898 mmc_blk_clear_packed(mq_rq);
1899 }
1900 return ret;
1901 }
1902 list_del_init(&prq->queuelist);
1903 blk_end_request(prq, 0, blk_rq_bytes(prq));
1904 i++;
1905 }
1906
1907 mmc_blk_clear_packed(mq_rq);
1908 return ret;
1909}
1910
1911static void mmc_blk_abort_packed_req(struct mmc_queue_req *mq_rq)
1912{
1913 struct request *prq;
1914 struct mmc_packed *packed = mq_rq->packed;
1915
1916 BUG_ON(!packed);
1917
1918 while (!list_empty(&packed->list)) {
1919 prq = list_entry_rq(packed->list.next);
1920 list_del_init(&prq->queuelist);
1921 blk_end_request(prq, -EIO, blk_rq_bytes(prq));
1922 }
1923
1924 mmc_blk_clear_packed(mq_rq);
1925}
1926
1927static void mmc_blk_revert_packed_req(struct mmc_queue *mq,
1928 struct mmc_queue_req *mq_rq)
1929{
1930 struct request *prq;
1931 struct request_queue *q = mq->queue;
1932 struct mmc_packed *packed = mq_rq->packed;
1933
1934 BUG_ON(!packed);
1935
1936 while (!list_empty(&packed->list)) {
1937 prq = list_entry_rq(packed->list.prev);
1938 if (prq->queuelist.prev != &packed->list) {
1939 list_del_init(&prq->queuelist);
1940 spin_lock_irq(q->queue_lock);
1941 blk_requeue_request(mq->queue, prq);
1942 spin_unlock_irq(q->queue_lock);
1943 } else {
1944 list_del_init(&prq->queuelist);
1945 }
1946 }
1947
1948 mmc_blk_clear_packed(mq_rq);
1949}
1950
ee8a43a5 1951static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc)
54d49d77
PF		 1952{
1953 struct mmc_blk_data *md = mq->data;
1954 struct mmc_card *card = md->queue.card;
1955 struct mmc_blk_request *brq = &mq->mqrq_cur->brq;
b8360a49 1956 int ret = 1, disable_multi = 0, retry = 0, type, retune_retry_done = 0;
d78d4a8a 1957 enum mmc_blk_status status;
ee8a43a5 1958 struct mmc_queue_req *mq_rq;
a5075eb9 1959 struct request *req = rqc;
ee8a43a5 1960 struct mmc_async_req *areq;
ce39f9d1
SJ		 1961 const u8 packed_nr = 2;
1962 u8 reqs = 0;
1da177e4 1963
ee8a43a5
PF		 1964 if (!rqc && !mq->mqrq_prev->req)
1965 return 0;
98ccf149 1966
ce39f9d1
SJ		 1967 if (rqc)
1968 reqs = mmc_blk_prep_packed_list(mq, rqc);
1969
ee8a43a5
PF		 1970 do {
1971 if (rqc) {
a5075eb9
SD		 1972 /*
1973 * When 4KB native sector is enabled, only 8 blocks
1974 * multiple read or write is allowed
1975 */
1976 if ((brq->data.blocks & 0x07) &&
1977 (card->ext_csd.data_sector_size == 4096)) {
1978 pr_err("%s: Transfer size is not 4KB sector size aligned\n",
1979 req->rq_disk->disk_name);
ce39f9d1 1980 mq_rq = mq->mqrq_cur;
a5075eb9
SD		 1981 goto cmd_abort;
1982 }
ce39f9d1
SJ		 1983
1984 if (reqs >= packed_nr)
1985 mmc_blk_packed_hdr_wrq_prep(mq->mqrq_cur,
1986 card, mq);
1987 else
1988 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
ee8a43a5
PF		 1989 areq = &mq->mqrq_cur->mmc_active;
1990 } else
1991 areq = NULL;
1992 areq = mmc_start_req(card->host, areq, (int *) &status);
2220eedf
KD		 1993 if (!areq) {
1994 if (status == MMC_BLK_NEW_REQUEST)
1995 mq->flags |= MMC_QUEUE_NEW_REQUEST;
ee8a43a5 1996 return 0;
2220eedf 1997 }
ee8a43a5
PF		 1998
1999 mq_rq = container_of(areq, struct mmc_queue_req, mmc_active);
2000 brq = &mq_rq->brq;
2001 req = mq_rq->req;
67716327 2002 type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
ee8a43a5 2003 mmc_queue_bounce_post(mq_rq);
98ccf149 2004
d78d4a8a
PF		 2005 switch (status) {
2006 case MMC_BLK_SUCCESS:
2007 case MMC_BLK_PARTIAL:
2008 /*
2009 * A block was successfully transferred.
2010 */
67716327 2011 mmc_blk_reset_success(md, type);
ce39f9d1
SJ		 2012
2013 if (mmc_packed_cmd(mq_rq->cmd_type)) {
2014 ret = mmc_blk_end_packed_req(mq_rq);
2015 break;
2016 } else {
2017 ret = blk_end_request(req, 0,
d78d4a8a 2018 brq->data.bytes_xfered);
ce39f9d1
SJ		 2019 }
2020
67716327
AH		 2021 /*
2022 * If the blk_end_request function returns non-zero even
2023 * though all data has been transferred and no errors
2024 * were returned by the host controller, it's a bug.
2025 */
ee8a43a5 2026 if (status == MMC_BLK_SUCCESS && ret) {
a3c76eb9 2027 pr_err("%s BUG rq_tot %d d_xfer %d\n",
ee8a43a5
PF		 2028 __func__, blk_rq_bytes(req),
2029 brq->data.bytes_xfered);
2030 rqc = NULL;
2031 goto cmd_abort;
2032 }
d78d4a8a
PF		 2033 break;
2034 case MMC_BLK_CMD_ERR:
67716327 2035 ret = mmc_blk_cmd_err(md, card, brq, req, ret);
29535f7b
DW		 2036 if (mmc_blk_reset(md, card->host, type))
2037 goto cmd_abort;
2038 if (!ret)
2039 goto start_new_req;
2040 break;
d78d4a8a 2041 case MMC_BLK_RETRY:
b8360a49 2042 retune_retry_done = brq->retune_retry_done;
d78d4a8a 2043 if (retry++ < 5)
a01f3ccf 2044 break;
67716327 2045 /* Fall through */
d78d4a8a 2046 case MMC_BLK_ABORT:
67716327
AH		 2047 if (!mmc_blk_reset(md, card->host, type))
2048 break;
4c2b8f26 2049 goto cmd_abort;
67716327
AH		 2050 case MMC_BLK_DATA_ERR: {
2051 int err;
2052
2053 err = mmc_blk_reset(md, card->host, type);
2054 if (!err)
2055 break;
ce39f9d1
SJ		 2056 if (err == -ENODEV ||
2057 mmc_packed_cmd(mq_rq->cmd_type))
67716327
AH		 2058 goto cmd_abort;
2059 /* Fall through */
2060 }
2061 case MMC_BLK_ECC_ERR:
2062 if (brq->data.blocks > 1) {
2063 /* Redo read one sector at a time */
6606110d
JP		 2064 pr_warn("%s: retrying using single block read\n",
2065 req->rq_disk->disk_name);
67716327
AH		 2066 disable_multi = 1;
2067 break;
2068 }
d78d4a8a
PF		 2069 /*
2070 * After an error, we redo I/O one sector at a
2071 * time, so we only reach here after trying to
2072 * read a single sector.
2073 */
ecf8b5d0 2074 ret = blk_end_request(req, -EIO,
d78d4a8a 2075 brq->data.blksz);
ee8a43a5
PF		 2076 if (!ret)
2077 goto start_new_req;
d78d4a8a 2078 break;
a8ad82cc
SRT		 2079 case MMC_BLK_NOMEDIUM:
2080 goto cmd_abort;
2220eedf
KD		 2081 default:
2082 pr_err("%s: Unhandled return value (%d)",
2083 req->rq_disk->disk_name, status);
2084 goto cmd_abort;
4c2b8f26
RKAL		 2085 }
2086
ee8a43a5 2087 if (ret) {
ce39f9d1
SJ		 2088 if (mmc_packed_cmd(mq_rq->cmd_type)) {
2089 if (!mq_rq->packed->retries)
2090 goto cmd_abort;
2091 mmc_blk_packed_hdr_wrq_prep(mq_rq, card, mq);
2092 mmc_start_req(card->host,
2093 &mq_rq->mmc_active, NULL);
2094 } else {
2095
2096 /*
2097 * In case of a incomplete request
2098 * prepare it again and resend.
2099 */
2100 mmc_blk_rw_rq_prep(mq_rq, card,
2101 disable_multi, mq);
2102 mmc_start_req(card->host,
2103 &mq_rq->mmc_active, NULL);
2104 }
b8360a49 2105 mq_rq->brq.retune_retry_done = retune_retry_done;
ee8a43a5 2106 }
1da177e4
LT		 2107 } while (ret);
2108
1da177e4
LT		 2109 return 1;
2110
a01f3ccf 2111 cmd_abort:
ce39f9d1
SJ		 2112 if (mmc_packed_cmd(mq_rq->cmd_type)) {
2113 mmc_blk_abort_packed_req(mq_rq);
2114 } else {
2115 if (mmc_card_removed(card))
2116 req->cmd_flags |= REQ_QUIET;
2117 while (ret)
2118 ret = blk_end_request(req, -EIO,
2119 blk_rq_cur_bytes(req));
2120 }
1da177e4 2121
ee8a43a5
PF		 2122 start_new_req:
2123 if (rqc) {
7a81902f
SJ		 2124 if (mmc_card_removed(card)) {
2125 rqc->cmd_flags |= REQ_QUIET;
2126 blk_end_request_all(rqc, -EIO);
2127 } else {
ce39f9d1
SJ		 2128 /*
2129 * If current request is packed, it needs to put back.
2130 */
2131 if (mmc_packed_cmd(mq->mqrq_cur->cmd_type))
2132 mmc_blk_revert_packed_req(mq, mq->mqrq_cur);
2133
7a81902f
SJ		 2134 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
2135 mmc_start_req(card->host,
2136 &mq->mqrq_cur->mmc_active, NULL);
2137 }
ee8a43a5
PF		 2138 }
2139
1da177e4
LT		 2140 return 0;
2141}
2142
bd788c96
AH		 2143static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
2144{
1a258db6
AW		 2145 int ret;
2146 struct mmc_blk_data *md = mq->data;
2147 struct mmc_card *card = md->queue.card;
2220eedf
KD		 2148 struct mmc_host *host = card->host;
2149 unsigned long flags;
f662ae48 2150 unsigned int cmd_flags = req ? req->cmd_flags : 0;
1a258db6 2151
ee8a43a5
PF		 2152 if (req && !mq->mqrq_prev->req)
2153 /* claim host only for the first request */
e94cfef6 2154 mmc_get_card(card);
ee8a43a5 2155
371a689f
AW		 2156 ret = mmc_blk_part_switch(card, md);
2157 if (ret) {
0d7d85ca 2158 if (req) {
ecf8b5d0 2159 blk_end_request_all(req, -EIO);
0d7d85ca 2160 }
371a689f
AW		 2161 ret = 0;
2162 goto out;
2163 }
1a258db6 2164
2220eedf 2165 mq->flags &= ~MMC_QUEUE_NEW_REQUEST;
c2df40df 2166 if (req && req_op(req) == REQ_OP_DISCARD) {
ee8a43a5
PF		 2167 /* complete ongoing async transfer before issuing discard */
2168 if (card->host->areq)
2169 mmc_blk_issue_rw_rq(mq, NULL);
5204d00f 2170 if (req->cmd_flags & REQ_SECURE)
1a258db6 2171 ret = mmc_blk_issue_secdiscard_rq(mq, req);
49804548 2172 else
1a258db6 2173 ret = mmc_blk_issue_discard_rq(mq, req);
f662ae48 2174 } else if (cmd_flags & REQ_FLUSH) {
393f9a08
JC		 2175 /* complete ongoing async transfer before issuing flush */
2176 if (card->host->areq)
2177 mmc_blk_issue_rw_rq(mq, NULL);
1a258db6 2178 ret = mmc_blk_issue_flush(mq, req);
49804548 2179 } else {
2220eedf
KD		 2180 if (!req && host->areq) {
2181 spin_lock_irqsave(&host->context_info.lock, flags);
2182 host->context_info.is_waiting_last_req = true;
2183 spin_unlock_irqrestore(&host->context_info.lock, flags);
2184 }
1a258db6 2185 ret = mmc_blk_issue_rw_rq(mq, req);
49804548 2186 }
1a258db6 2187
371a689f 2188out:
ef3a69c7 2189 if ((!req && !(mq->flags & MMC_QUEUE_NEW_REQUEST)) ||
c2df40df 2190 mmc_req_is_special(req))
ef3a69c7
SJ		 2191 /*
2192 * Release host when there are no more requests
2193 * and after special request(discard, flush) is done.
2194 * In case sepecial request, there is no reentry to
2195 * the 'mmc_blk_issue_rq' with 'mqrq_prev->req'.
2196 */
e94cfef6 2197 mmc_put_card(card);
1a258db6 2198 return ret;
bd788c96 2199}
1da177e4 2200
a6f6c96b
RK		 2201static inline int mmc_blk_readonly(struct mmc_card *card)
2202{
2203 return mmc_card_readonly(card) ||
2204 !(card->csd.cmdclass & CCC_BLOCK_WRITE);
2205}
2206
371a689f
AW		 2207static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
2208 struct device *parent,
2209 sector_t size,
2210 bool default_ro,
add710ea
JR		 2211 const char *subname,
2212 int area_type)
1da177e4
LT		 2213{
2214 struct mmc_blk_data *md;
2215 int devidx, ret;
2216
b10fa99e
UH		 2217again:
2218 if (!ida_pre_get(&mmc_blk_ida, GFP_KERNEL))
2219 return ERR_PTR(-ENOMEM);
2220
2221 spin_lock(&mmc_blk_lock);
2222 ret = ida_get_new(&mmc_blk_ida, &devidx);
2223 spin_unlock(&mmc_blk_lock);
2224
2225 if (ret == -EAGAIN)
2226 goto again;
2227 else if (ret)
2228 return ERR_PTR(ret);
2229
2230 if (devidx >= max_devices) {
2231 ret = -ENOSPC;
2232 goto out;
2233 }
1da177e4 2234
dd00cc48 2235 md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL);
a6f6c96b
RK		 2236 if (!md) {
2237 ret = -ENOMEM;
2238 goto out;
2239 }
1da177e4 2240
add710ea
JR		 2241 md->area_type = area_type;
2242
a6f6c96b
RK		 2243 /*
2244 * Set the read-only status based on the supported commands
2245 * and the write protect switch.
2246 */
2247 md->read_only = mmc_blk_readonly(card);
1da177e4 2248
5e71b7a6 2249 md->disk = alloc_disk(perdev_minors);
a6f6c96b
RK		 2250 if (md->disk == NULL) {
2251 ret = -ENOMEM;
2252 goto err_kfree;
2253 }
1da177e4 2254
a6f6c96b 2255 spin_lock_init(&md->lock);
371a689f 2256 INIT_LIST_HEAD(&md->part);
a6f6c96b 2257 md->usage = 1;
1da177e4 2258
d09408ad 2259 ret = mmc_init_queue(&md->queue, card, &md->lock, subname);
a6f6c96b
RK		 2260 if (ret)
2261 goto err_putdisk;
1da177e4 2262
a6f6c96b
RK		 2263 md->queue.issue_fn = mmc_blk_issue_rq;
2264 md->queue.data = md;
d2b18394 2265
fe6b4c88 2266 md->disk->major = MMC_BLOCK_MAJOR;
5e71b7a6 2267 md->disk->first_minor = devidx * perdev_minors;
a6f6c96b
RK		 2268 md->disk->fops = &mmc_bdops;
2269 md->disk->private_data = md;
2270 md->disk->queue = md->queue.queue;
371a689f
AW		 2271 md->disk->driverfs_dev = parent;
2272 set_disk_ro(md->disk, md->read_only || default_ro);
382c55f8 2273 md->disk->flags = GENHD_FL_EXT_DEVT;
f5b4d71f 2274 if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT))
53d8f974 2275 md->disk->flags |= GENHD_FL_NO_PART_SCAN;
a6f6c96b
RK		 2276
2277 /*
2278 * As discussed on lkml, GENHD_FL_REMOVABLE should:
2279 *
2280 * - be set for removable media with permanent block devices
2281 * - be unset for removable block devices with permanent media
2282 *
2283 * Since MMC block devices clearly fall under the second
2284 * case, we do not set GENHD_FL_REMOVABLE. Userspace
2285 * should use the block device creation/destruction hotplug
2286 * messages to tell when the card is present.
2287 */
2288
f06c9153 2289 snprintf(md->disk->disk_name, sizeof(md->disk->disk_name),
9aaf3437 2290 "mmcblk%u%s", card->host->index, subname ? subname : "");
a6f6c96b 2291
a5075eb9
SD		 2292 if (mmc_card_mmc(card))
2293 blk_queue_logical_block_size(md->queue.queue,
2294 card->ext_csd.data_sector_size);
2295 else
2296 blk_queue_logical_block_size(md->queue.queue, 512);
2297
371a689f 2298 set_capacity(md->disk, size);
d0c97cfb 2299
f0d89972
AW		 2300 if (mmc_host_cmd23(card->host)) {
2301 if (mmc_card_mmc(card) ||
2302 (mmc_card_sd(card) &&
2303 card->scr.cmds & SD_SCR_CMD23_SUPPORT))
2304 md->flags |= MMC_BLK_CMD23;
2305 }
d0c97cfb
AW		 2306
2307 if (mmc_card_mmc(card) &&
2308 md->flags & MMC_BLK_CMD23 &&
2309 ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) ||
2310 card->ext_csd.rel_sectors)) {
2311 md->flags |= MMC_BLK_REL_WR;
e9d5c746 2312 blk_queue_write_cache(md->queue.queue, true, true);
d0c97cfb
AW		 2313 }
2314
ce39f9d1
SJ		 2315 if (mmc_card_mmc(card) &&
2316 (area_type == MMC_BLK_DATA_AREA_MAIN) &&
2317 (md->flags & MMC_BLK_CMD23) &&
2318 card->ext_csd.packed_event_en) {
2319 if (!mmc_packed_init(&md->queue, card))
2320 md->flags |= MMC_BLK_PACKED_CMD;
2321 }
2322
371a689f
AW		 2323 return md;
2324
2325 err_putdisk:
2326 put_disk(md->disk);
2327 err_kfree:
2328 kfree(md);
2329 out:
b10fa99e
UH		 2330 spin_lock(&mmc_blk_lock);
2331 ida_remove(&mmc_blk_ida, devidx);
2332 spin_unlock(&mmc_blk_lock);
371a689f
AW		 2333 return ERR_PTR(ret);
2334}
2335
2336static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
2337{
2338 sector_t size;
a6f6c96b 2339
85a18ad9
PO		 2340 if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) {
2341 /*
2342 * The EXT_CSD sector count is in number or 512 byte
2343 * sectors.
2344 */
371a689f 2345 size = card->ext_csd.sectors;
85a18ad9
PO		 2346 } else {
2347 /*
2348 * The CSD capacity field is in units of read_blkbits.
2349 * set_capacity takes units of 512 bytes.
2350 */
087de9ed
KM		 2351 size = (typeof(sector_t))card->csd.capacity
2352 << (card->csd.read_blkbits - 9);
85a18ad9 2353 }
371a689f 2354
7a30f2af 2355 return mmc_blk_alloc_req(card, &card->dev, size, false, NULL,
add710ea 2356 MMC_BLK_DATA_AREA_MAIN);
371a689f 2357}
a6f6c96b 2358
371a689f
AW		 2359static int mmc_blk_alloc_part(struct mmc_card *card,
2360 struct mmc_blk_data *md,
2361 unsigned int part_type,
2362 sector_t size,
2363 bool default_ro,
add710ea
JR		 2364 const char *subname,
2365 int area_type)
371a689f
AW		 2366{
2367 char cap_str[10];
2368 struct mmc_blk_data *part_md;
2369
2370 part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro,
add710ea 2371 subname, area_type);
371a689f
AW		 2372 if (IS_ERR(part_md))
2373 return PTR_ERR(part_md);
2374 part_md->part_type = part_type;
2375 list_add(&part_md->part, &md->part);
2376
b9f28d86 2377 string_get_size((u64)get_capacity(part_md->disk), 512, STRING_UNITS_2,
371a689f 2378 cap_str, sizeof(cap_str));
a3c76eb9 2379 pr_info("%s: %s %s partition %u %s\n",
371a689f
AW		 2380 part_md->disk->disk_name, mmc_card_id(card),
2381 mmc_card_name(card), part_md->part_type, cap_str);
2382 return 0;
2383}
2384
e0c368d5
NJ		 2385/* MMC Physical partitions consist of two boot partitions and
2386 * up to four general purpose partitions.
2387 * For each partition enabled in EXT_CSD a block device will be allocatedi
2388 * to provide access to the partition.
2389 */
2390
371a689f
AW		 2391static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md)
2392{
e0c368d5 2393 int idx, ret = 0;
371a689f
AW		 2394
2395 if (!mmc_card_mmc(card))
2396 return 0;
2397
e0c368d5
NJ		 2398 for (idx = 0; idx < card->nr_parts; idx++) {
2399 if (card->part[idx].size) {
2400 ret = mmc_blk_alloc_part(card, md,
2401 card->part[idx].part_cfg,
2402 card->part[idx].size >> 9,
2403 card->part[idx].force_ro,
add710ea
JR		 2404 card->part[idx].name,
2405 card->part[idx].area_type);
e0c368d5
NJ		 2406 if (ret)
2407 return ret;
2408 }
371a689f
AW		 2409 }
2410
2411 return ret;
1da177e4
LT		 2412}
2413
371a689f
AW		 2414static void mmc_blk_remove_req(struct mmc_blk_data *md)
2415{
add710ea
JR		 2416 struct mmc_card *card;
2417
371a689f 2418 if (md) {
fdfa20c1
PT		 2419 /*
2420 * Flush remaining requests and free queues. It
2421 * is freeing the queue that stops new requests
2422 * from being accepted.
2423 */
8efb83a2 2424 card = md->queue.card;
fdfa20c1
PT		 2425 mmc_cleanup_queue(&md->queue);
2426 if (md->flags & MMC_BLK_PACKED_CMD)
2427 mmc_packed_clean(&md->queue);
371a689f
AW		 2428 if (md->disk->flags & GENHD_FL_UP) {
2429 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
add710ea
JR		 2430 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2431 card->ext_csd.boot_ro_lockable)
2432 device_remove_file(disk_to_dev(md->disk),
2433 &md->power_ro_lock);
371a689f 2434
371a689f
AW		 2435 del_gendisk(md->disk);
2436 }
371a689f
AW		 2437 mmc_blk_put(md);
2438 }
2439}
2440
2441static void mmc_blk_remove_parts(struct mmc_card *card,
2442 struct mmc_blk_data *md)
2443{
2444 struct list_head *pos, *q;
2445 struct mmc_blk_data *part_md;
2446
2447 list_for_each_safe(pos, q, &md->part) {
2448 part_md = list_entry(pos, struct mmc_blk_data, part);
2449 list_del(pos);
2450 mmc_blk_remove_req(part_md);
2451 }
2452}
2453
2454static int mmc_add_disk(struct mmc_blk_data *md)
2455{
2456 int ret;
add710ea 2457 struct mmc_card *card = md->queue.card;
371a689f
AW		 2458
2459 add_disk(md->disk);
2460 md->force_ro.show = force_ro_show;
2461 md->force_ro.store = force_ro_store;
641c3187 2462 sysfs_attr_init(&md->force_ro.attr);
371a689f
AW		 2463 md->force_ro.attr.name = "force_ro";
2464 md->force_ro.attr.mode = S_IRUGO | S_IWUSR;
2465 ret = device_create_file(disk_to_dev(md->disk), &md->force_ro);
2466 if (ret)
add710ea
JR		 2467 goto force_ro_fail;
2468
2469 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2470 card->ext_csd.boot_ro_lockable) {
88187398 2471 umode_t mode;
add710ea
JR		 2472
2473 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS)
2474 mode = S_IRUGO;
2475 else
2476 mode = S_IRUGO | S_IWUSR;
2477
2478 md->power_ro_lock.show = power_ro_lock_show;
2479 md->power_ro_lock.store = power_ro_lock_store;
00d9ac08 2480 sysfs_attr_init(&md->power_ro_lock.attr);
add710ea
JR		 2481 md->power_ro_lock.attr.mode = mode;
2482 md->power_ro_lock.attr.name =
2483 "ro_lock_until_next_power_on";
2484 ret = device_create_file(disk_to_dev(md->disk),
2485 &md->power_ro_lock);
2486 if (ret)
2487 goto power_ro_lock_fail;
2488 }
2489 return ret;
2490
2491power_ro_lock_fail:
2492 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2493force_ro_fail:
2494 del_gendisk(md->disk);
371a689f
AW		 2495
2496 return ret;
2497}
2498
c59d4473
CB		 2499#define CID_MANFID_SANDISK 0x2
2500#define CID_MANFID_TOSHIBA 0x11
2501#define CID_MANFID_MICRON 0x13
3550ccdb 2502#define CID_MANFID_SAMSUNG 0x15
b5b4ff0a 2503#define CID_MANFID_KINGSTON 0x70
c59d4473 2504
6f60c222
AW		 2505static const struct mmc_fixup blk_fixups[] =
2506{
c59d4473
CB		 2507 MMC_FIXUP("SEM02G", CID_MANFID_SANDISK, 0x100, add_quirk,
2508 MMC_QUIRK_INAND_CMD38),
2509 MMC_FIXUP("SEM04G", CID_MANFID_SANDISK, 0x100, add_quirk,
2510 MMC_QUIRK_INAND_CMD38),
2511 MMC_FIXUP("SEM08G", CID_MANFID_SANDISK, 0x100, add_quirk,
2512 MMC_QUIRK_INAND_CMD38),
2513 MMC_FIXUP("SEM16G", CID_MANFID_SANDISK, 0x100, add_quirk,
2514 MMC_QUIRK_INAND_CMD38),
2515 MMC_FIXUP("SEM32G", CID_MANFID_SANDISK, 0x100, add_quirk,
2516 MMC_QUIRK_INAND_CMD38),
d0c97cfb
AW		 2517
2518 /*
2519 * Some MMC cards experience performance degradation with CMD23
2520 * instead of CMD12-bounded multiblock transfers. For now we'll
2521 * black list what's bad...
2522 * - Certain Toshiba cards.
2523 *
2524 * N.B. This doesn't affect SD cards.
2525 */
7d70d476
YL		 2526 MMC_FIXUP("SDMB-32", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
2527 MMC_QUIRK_BLK_NO_CMD23),
2528 MMC_FIXUP("SDM032", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
2529 MMC_QUIRK_BLK_NO_CMD23),
c59d4473 2530 MMC_FIXUP("MMC08G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
d0c97cfb 2531 MMC_QUIRK_BLK_NO_CMD23),
c59d4473 2532 MMC_FIXUP("MMC16G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
d0c97cfb 2533 MMC_QUIRK_BLK_NO_CMD23),
c59d4473 2534 MMC_FIXUP("MMC32G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
d0c97cfb 2535 MMC_QUIRK_BLK_NO_CMD23),
6de5fc9c
SNX		 2536
2537 /*
32ecd320 2538 * Some MMC cards need longer data read timeout than indicated in CSD.
6de5fc9c 2539 */
c59d4473 2540 MMC_FIXUP(CID_NAME_ANY, CID_MANFID_MICRON, 0x200, add_quirk_mmc,
6de5fc9c 2541 MMC_QUIRK_LONG_READ_TIME),
32ecd320
MG		 2542 MMC_FIXUP("008GE0", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2543 MMC_QUIRK_LONG_READ_TIME),
6de5fc9c 2544
3550ccdb
IC		 2545 /*
2546 * On these Samsung MoviNAND parts, performing secure erase or
2547 * secure trim can result in unrecoverable corruption due to a
2548 * firmware bug.
2549 */
2550 MMC_FIXUP("M8G2FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2551 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2552 MMC_FIXUP("MAG4FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2553 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2554 MMC_FIXUP("MBG8FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2555 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2556 MMC_FIXUP("MCGAFA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2557 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2558 MMC_FIXUP("VAL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2559 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2560 MMC_FIXUP("VYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2561 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2562 MMC_FIXUP("KYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2563 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2564 MMC_FIXUP("VZL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2565 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2566
b5b4ff0a
SL		 2567 /*
2568 * On Some Kingston eMMCs, performing trim can result in
2569 * unrecoverable data conrruption occasionally due to a firmware bug.
2570 */
2571 MMC_FIXUP("V10008", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
2572 MMC_QUIRK_TRIM_BROKEN),
2573 MMC_FIXUP("V10016", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
2574 MMC_QUIRK_TRIM_BROKEN),
2575
6f60c222
AW		 2576 END_FIXUP
2577};
2578
96541bac 2579static int mmc_blk_probe(struct mmc_card *card)
1da177e4 2580{
371a689f 2581 struct mmc_blk_data *md, *part_md;
a7bbb573
PO		 2582 char cap_str[10];
2583
912490db
PO		 2584 /*
2585 * Check that the card supports the command class(es) we need.
2586 */
2587 if (!(card->csd.cmdclass & CCC_BLOCK_READ))
1da177e4
LT		 2588 return -ENODEV;
2589
5204d00f
LC		 2590 mmc_fixup_device(card, blk_fixups);
2591
1da177e4
LT		 2592 md = mmc_blk_alloc(card);
2593 if (IS_ERR(md))
2594 return PTR_ERR(md);
2595
b9f28d86 2596 string_get_size((u64)get_capacity(md->disk), 512, STRING_UNITS_2,
a7bbb573 2597 cap_str, sizeof(cap_str));
a3c76eb9 2598 pr_info("%s: %s %s %s %s\n",
1da177e4 2599 md->disk->disk_name, mmc_card_id(card), mmc_card_name(card),
a7bbb573 2600 cap_str, md->read_only ? "(ro)" : "");
1da177e4 2601
371a689f
AW		 2602 if (mmc_blk_alloc_parts(card, md))
2603 goto out;
2604
96541bac 2605 dev_set_drvdata(&card->dev, md);
6f60c222 2606
371a689f
AW		 2607 if (mmc_add_disk(md))
2608 goto out;
2609
2610 list_for_each_entry(part_md, &md->part, part) {
2611 if (mmc_add_disk(part_md))
2612 goto out;
2613 }
e94cfef6
UH		 2614
2615 pm_runtime_set_autosuspend_delay(&card->dev, 3000);
2616 pm_runtime_use_autosuspend(&card->dev);
2617
2618 /*
2619 * Don't enable runtime PM for SD-combo cards here. Leave that
2620 * decision to be taken during the SDIO init sequence instead.
2621 */
2622 if (card->type != MMC_TYPE_SD_COMBO) {
2623 pm_runtime_set_active(&card->dev);
2624 pm_runtime_enable(&card->dev);
2625 }
2626
1da177e4
LT		 2627 return 0;
2628
2629 out:
371a689f
AW		 2630 mmc_blk_remove_parts(card, md);
2631 mmc_blk_remove_req(md);
5865f287 2632 return 0;
1da177e4
LT		 2633}
2634
96541bac 2635static void mmc_blk_remove(struct mmc_card *card)
1da177e4 2636{
96541bac 2637 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
1da177e4 2638
371a689f 2639 mmc_blk_remove_parts(card, md);
e94cfef6 2640 pm_runtime_get_sync(&card->dev);
ddd6fa7e
AH		 2641 mmc_claim_host(card->host);
2642 mmc_blk_part_switch(card, md);
2643 mmc_release_host(card->host);
e94cfef6
UH		 2644 if (card->type != MMC_TYPE_SD_COMBO)
2645 pm_runtime_disable(&card->dev);
2646 pm_runtime_put_noidle(&card->dev);
371a689f 2647 mmc_blk_remove_req(md);
96541bac 2648 dev_set_drvdata(&card->dev, NULL);
1da177e4
LT		 2649}
2650
96541bac 2651static int _mmc_blk_suspend(struct mmc_card *card)
1da177e4 2652{
371a689f 2653 struct mmc_blk_data *part_md;
96541bac 2654 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
1da177e4
LT		 2655
2656 if (md) {
2657 mmc_queue_suspend(&md->queue);
371a689f
AW		 2658 list_for_each_entry(part_md, &md->part, part) {
2659 mmc_queue_suspend(&part_md->queue);
2660 }
1da177e4
LT		 2661 }
2662 return 0;
2663}
2664
96541bac 2665static void mmc_blk_shutdown(struct mmc_card *card)
76287748 2666{
96541bac 2667 _mmc_blk_suspend(card);
76287748
UH		 2668}
2669
0967edc6
UH		 2670#ifdef CONFIG_PM_SLEEP
2671static int mmc_blk_suspend(struct device *dev)
76287748 2672{
96541bac
UH		 2673 struct mmc_card *card = mmc_dev_to_card(dev);
2674
2675 return _mmc_blk_suspend(card);
76287748
UH		 2676}
2677
0967edc6 2678static int mmc_blk_resume(struct device *dev)
1da177e4 2679{
371a689f 2680 struct mmc_blk_data *part_md;
fc95e30b 2681 struct mmc_blk_data *md = dev_get_drvdata(dev);
1da177e4
LT		 2682
2683 if (md) {
371a689f
AW		 2684 /*
2685 * Resume involves the card going into idle state,
2686 * so current partition is always the main one.
2687 */
2688 md->part_curr = md->part_type;
1da177e4 2689 mmc_queue_resume(&md->queue);
371a689f
AW		 2690 list_for_each_entry(part_md, &md->part, part) {
2691 mmc_queue_resume(&part_md->queue);
2692 }
1da177e4
LT		 2693 }
2694 return 0;
2695}
1da177e4
LT		 2696#endif
2697
0967edc6
UH		 2698static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops, mmc_blk_suspend, mmc_blk_resume);
2699
96541bac
UH		 2700static struct mmc_driver mmc_driver = {
2701 .drv = {
2702 .name = "mmcblk",
2703 .pm = &mmc_blk_pm_ops,
2704 },
1da177e4
LT		 2705 .probe = mmc_blk_probe,
2706 .remove = mmc_blk_remove,
76287748 2707 .shutdown = mmc_blk_shutdown,
1da177e4
LT		 2708};
2709
2710static int __init mmc_blk_init(void)
2711{
9d4e98e9 2712 int res;
1da177e4 2713
5e71b7a6
OJ		 2714 if (perdev_minors != CONFIG_MMC_BLOCK_MINORS)
2715 pr_info("mmcblk: using %d minors per device\n", perdev_minors);
2716
a26eba61 2717 max_devices = min(MAX_DEVICES, (1 << MINORBITS) / perdev_minors);
5e71b7a6 2718
fe6b4c88
PO		 2719 res = register_blkdev(MMC_BLOCK_MAJOR, "mmc");
2720 if (res)
1da177e4 2721 goto out;
1da177e4 2722
9d4e98e9
AM		 2723 res = mmc_register_driver(&mmc_driver);
2724 if (res)
2725 goto out2;
1da177e4 2726
9d4e98e9
AM		 2727 return 0;
2728 out2:
2729 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
1da177e4
LT		 2730 out:
2731 return res;
2732}
2733
2734static void __exit mmc_blk_exit(void)
2735{
2736 mmc_unregister_driver(&mmc_driver);
fe6b4c88 2737 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
1da177e4
LT		 2738}
2739
2740module_init(mmc_blk_init);
2741module_exit(mmc_blk_exit);
2742
2743MODULE_LICENSE("GPL");
2744MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver");
2745
Linux 6.x block layer and io_uring tree(s)