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20#include <linux/moduleparam.h>
21#include <linux/module.h>
22#include <linux/init.h>
23
24#include <linux/kernel.h>
25#include <linux/fs.h>
26#include <linux/slab.h>
27#include <linux/errno.h>
28#include <linux/hdreg.h>
29#include <linux/kdev_t.h>
30#include <linux/blkdev.h>
31#include <linux/mutex.h>
32#include <linux/scatterlist.h>
33#include <linux/string_helpers.h>
34#include <linux/delay.h>
35#include <linux/capability.h>
36#include <linux/compat.h>
37#include <linux/pm_runtime.h>
38
39#include <linux/mmc/ioctl.h>
40#include <linux/mmc/card.h>
41#include <linux/mmc/host.h>
42#include <linux/mmc/mmc.h>
43#include <linux/mmc/sd.h>
44
45#include <asm/uaccess.h>
46
47#include "queue.h"
48
49MODULE_ALIAS("mmc:block");
50
51#ifdef KERNEL
52#ifdef MODULE_PARAM_PREFIX
53#undef MODULE_PARAM_PREFIX
54#endif
55#define MODULE_PARAM_PREFIX "mmcblk."
56#endif
57
58#define INAND_CMD38_ARG_EXT_CSD 113
59#define INAND_CMD38_ARG_ERASE 0x00
60#define INAND_CMD38_ARG_TRIM 0x01
61#define INAND_CMD38_ARG_SECERASE 0x80
62#define INAND_CMD38_ARG_SECTRIM1 0x81
63#define INAND_CMD38_ARG_SECTRIM2 0x88
64#define MMC_BLK_TIMEOUT_MS (10 * 60 * 1000)
65#define MMC_SANITIZE_REQ_TIMEOUT 240000
66#define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16)
67
68#define mmc_req_rel_wr(req) (((req->cmd_flags & REQ_FUA) || \
69 (req->cmd_flags & REQ_META)) && \
70 (rq_data_dir(req) == WRITE))
71#define PACKED_CMD_VER 0x01
72#define PACKED_CMD_WR 0x02
73
74static DEFINE_MUTEX(block_mutex);
75
76
77
78
79
80static int perdev_minors = CONFIG_MMC_BLOCK_MINORS;
81
82
83
84
85
86
87static int max_devices;
88
89#define MAX_DEVICES 256
90
91
92static DECLARE_BITMAP(dev_use, MAX_DEVICES);
93static DECLARE_BITMAP(name_use, MAX_DEVICES);
94
95
96
97
98struct mmc_blk_data {
99 spinlock_t lock;
100 struct gendisk *disk;
101 struct mmc_queue queue;
102 struct list_head part;
103
104 unsigned int flags;
105#define MMC_BLK_CMD23 (1 << 0)
106#define MMC_BLK_REL_WR (1 << 1)
107#define MMC_BLK_PACKED_CMD (1 << 2)
108
109 unsigned int usage;
110 unsigned int read_only;
111 unsigned int part_type;
112 unsigned int name_idx;
113 unsigned int reset_done;
114#define MMC_BLK_READ BIT(0)
115#define MMC_BLK_WRITE BIT(1)
116#define MMC_BLK_DISCARD BIT(2)
117#define MMC_BLK_SECDISCARD BIT(3)
118
119
120
121
122
123
124 unsigned int part_curr;
125 struct device_attribute force_ro;
126 struct device_attribute power_ro_lock;
127 int area_type;
128};
129
130static DEFINE_MUTEX(open_lock);
131
132enum {
133 MMC_PACKED_NR_IDX = -1,
134 MMC_PACKED_NR_ZERO,
135 MMC_PACKED_NR_SINGLE,
136};
137
138module_param(perdev_minors, int, 0444);
139MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device");
140
141static inline int mmc_blk_part_switch(struct mmc_card *card,
142 struct mmc_blk_data *md);
143static int get_card_status(struct mmc_card *card, u32 *status, int retries);
144
145static inline void mmc_blk_clear_packed(struct mmc_queue_req *mqrq)
146{
147 struct mmc_packed *packed = mqrq->packed;
148
149 BUG_ON(!packed);
150
151 mqrq->cmd_type = MMC_PACKED_NONE;
152 packed->nr_entries = MMC_PACKED_NR_ZERO;
153 packed->idx_failure = MMC_PACKED_NR_IDX;
154 packed->retries = 0;
155 packed->blocks = 0;
156}
157
158static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk)
159{
160 struct mmc_blk_data *md;
161
162 mutex_lock(&open_lock);
163 md = disk->private_data;
164 if (md && md->usage == 0)
165 md = NULL;
166 if (md)
167 md->usage++;
168 mutex_unlock(&open_lock);
169
170 return md;
171}
172
173static inline int mmc_get_devidx(struct gendisk *disk)
174{
175 int devmaj = MAJOR(disk_devt(disk));
176 int devidx = MINOR(disk_devt(disk)) / perdev_minors;
177
178 if (!devmaj)
179 devidx = disk->first_minor / perdev_minors;
180 return devidx;
181}
182
183static void mmc_blk_put(struct mmc_blk_data *md)
184{
185 mutex_lock(&open_lock);
186 md->usage--;
187 if (md->usage == 0) {
188 int devidx = mmc_get_devidx(md->disk);
189 blk_cleanup_queue(md->queue.queue);
190
191 __clear_bit(devidx, dev_use);
192
193 put_disk(md->disk);
194 kfree(md);
195 }
196 mutex_unlock(&open_lock);
197}
198
199static ssize_t power_ro_lock_show(struct device *dev,
200 struct device_attribute *attr, char *buf)
201{
202 int ret;
203 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
204 struct mmc_card *card = md->queue.card;
205 int locked = 0;
206
207 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PERM_WP_EN)
208 locked = 2;
209 else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN)
210 locked = 1;
211
212 ret = snprintf(buf, PAGE_SIZE, "%d\n", locked);
213
214 mmc_blk_put(md);
215
216 return ret;
217}
218
219static ssize_t power_ro_lock_store(struct device *dev,
220 struct device_attribute *attr, const char *buf, size_t count)
221{
222 int ret;
223 struct mmc_blk_data *md, *part_md;
224 struct mmc_card *card;
225 unsigned long set;
226
227 if (kstrtoul(buf, 0, &set))
228 return -EINVAL;
229
230 if (set != 1)
231 return count;
232
233 md = mmc_blk_get(dev_to_disk(dev));
234 card = md->queue.card;
235
236 mmc_get_card(card);
237
238 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP,
239 card->ext_csd.boot_ro_lock |
240 EXT_CSD_BOOT_WP_B_PWR_WP_EN,
241 card->ext_csd.part_time);
242 if (ret)
243 pr_err("%s: Locking boot partition ro until next power on failed: %d\n", md->disk->disk_name, ret);
244 else
245 card->ext_csd.boot_ro_lock |= EXT_CSD_BOOT_WP_B_PWR_WP_EN;
246
247 mmc_put_card(card);
248
249 if (!ret) {
250 pr_info("%s: Locking boot partition ro until next power on\n",
251 md->disk->disk_name);
252 set_disk_ro(md->disk, 1);
253
254 list_for_each_entry(part_md, &md->part, part)
255 if (part_md->area_type == MMC_BLK_DATA_AREA_BOOT) {
256 pr_info("%s: Locking boot partition ro until next power on\n", part_md->disk->disk_name);
257 set_disk_ro(part_md->disk, 1);
258 }
259 }
260
261 mmc_blk_put(md);
262 return count;
263}
264
265static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr,
266 char *buf)
267{
268 int ret;
269 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
270
271 ret = snprintf(buf, PAGE_SIZE, "%d\n",
272 get_disk_ro(dev_to_disk(dev)) ^
273 md->read_only);
274 mmc_blk_put(md);
275 return ret;
276}
277
278static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr,
279 const char *buf, size_t count)
280{
281 int ret;
282 char *end;
283 struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
284 unsigned long set = simple_strtoul(buf, &end, 0);
285 if (end == buf) {
286 ret = -EINVAL;
287 goto out;
288 }
289
290 set_disk_ro(dev_to_disk(dev), set || md->read_only);
291 ret = count;
292out:
293 mmc_blk_put(md);
294 return ret;
295}
296
297static int mmc_blk_open(struct block_device *bdev, fmode_t mode)
298{
299 struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk);
300 int ret = -ENXIO;
301
302 mutex_lock(&block_mutex);
303 if (md) {
304 if (md->usage == 2)
305 check_disk_change(bdev);
306 ret = 0;
307
308 if ((mode & FMODE_WRITE) && md->read_only) {
309 mmc_blk_put(md);
310 ret = -EROFS;
311 }
312 }
313 mutex_unlock(&block_mutex);
314
315 return ret;
316}
317
318static void mmc_blk_release(struct gendisk *disk, fmode_t mode)
319{
320 struct mmc_blk_data *md = disk->private_data;
321
322 mutex_lock(&block_mutex);
323 mmc_blk_put(md);
324 mutex_unlock(&block_mutex);
325}
326
327static int
328mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
329{
330 geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16);
331 geo->heads = 4;
332 geo->sectors = 16;
333 return 0;
334}
335
336struct mmc_blk_ioc_data {
337 struct mmc_ioc_cmd ic;
338 unsigned char *buf;
339 u64 buf_bytes;
340};
341
342static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user(
343 struct mmc_ioc_cmd __user *user)
344{
345 struct mmc_blk_ioc_data *idata;
346 int err;
347
348 idata = kzalloc(sizeof(*idata), GFP_KERNEL);
349 if (!idata) {
350 err = -ENOMEM;
351 goto out;
352 }
353
354 if (copy_from_user(&idata->ic, user, sizeof(idata->ic))) {
355 err = -EFAULT;
356 goto idata_err;
357 }
358
359 idata->buf_bytes = (u64) idata->ic.blksz * idata->ic.blocks;
360 if (idata->buf_bytes > MMC_IOC_MAX_BYTES) {
361 err = -EOVERFLOW;
362 goto idata_err;
363 }
364
365 if (!idata->buf_bytes)
366 return idata;
367
368 idata->buf = kzalloc(idata->buf_bytes, GFP_KERNEL);
369 if (!idata->buf) {
370 err = -ENOMEM;
371 goto idata_err;
372 }
373
374 if (copy_from_user(idata->buf, (void __user *)(unsigned long)
375 idata->ic.data_ptr, idata->buf_bytes)) {
376 err = -EFAULT;
377 goto copy_err;
378 }
379
380 return idata;
381
382copy_err:
383 kfree(idata->buf);
384idata_err:
385 kfree(idata);
386out:
387 return ERR_PTR(err);
388}
389
390static int ioctl_rpmb_card_status_poll(struct mmc_card *card, u32 *status,
391 u32 retries_max)
392{
393 int err;
394 u32 retry_count = 0;
395
396 if (!status || !retries_max)
397 return -EINVAL;
398
399 do {
400 err = get_card_status(card, status, 5);
401 if (err)
402 break;
403
404 if (!R1_STATUS(*status) &&
405 (R1_CURRENT_STATE(*status) != R1_STATE_PRG))
406 break;
407
408
409
410
411
412
413 usleep_range(1000, 5000);
414 } while (++retry_count < retries_max);
415
416 if (retry_count == retries_max)
417 err = -EPERM;
418
419 return err;
420}
421
422static int ioctl_do_sanitize(struct mmc_card *card)
423{
424 int err;
425
426 if (!mmc_can_sanitize(card)) {
427 pr_warn("%s: %s - SANITIZE is not supported\n",
428 mmc_hostname(card->host), __func__);
429 err = -EOPNOTSUPP;
430 goto out;
431 }
432
433 pr_debug("%s: %s - SANITIZE IN PROGRESS...\n",
434 mmc_hostname(card->host), __func__);
435
436 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
437 EXT_CSD_SANITIZE_START, 1,
438 MMC_SANITIZE_REQ_TIMEOUT);
439
440 if (err)
441 pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n",
442 mmc_hostname(card->host), __func__, err);
443
444 pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card->host),
445 __func__);
446out:
447 return err;
448}
449
450static int mmc_blk_ioctl_cmd(struct block_device *bdev,
451 struct mmc_ioc_cmd __user *ic_ptr)
452{
453 struct mmc_blk_ioc_data *idata;
454 struct mmc_blk_data *md;
455 struct mmc_card *card;
456 struct mmc_command cmd = {0};
457 struct mmc_data data = {0};
458 struct mmc_request mrq = {NULL};
459 struct scatterlist sg;
460 int err;
461 int is_rpmb = false;
462 u32 status = 0;
463
464
465
466
467
468
469 if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
470 return -EPERM;
471
472 idata = mmc_blk_ioctl_copy_from_user(ic_ptr);
473 if (IS_ERR(idata))
474 return PTR_ERR(idata);
475
476 md = mmc_blk_get(bdev->bd_disk);
477 if (!md) {
478 err = -EINVAL;
479 goto cmd_err;
480 }
481
482 if (md->area_type & MMC_BLK_DATA_AREA_RPMB)
483 is_rpmb = true;
484
485 card = md->queue.card;
486 if (IS_ERR(card)) {
487 err = PTR_ERR(card);
488 goto cmd_done;
489 }
490
491 cmd.opcode = idata->ic.opcode;
492 cmd.arg = idata->ic.arg;
493 cmd.flags = idata->ic.flags;
494
495 if (idata->buf_bytes) {
496 data.sg = &sg;
497 data.sg_len = 1;
498 data.blksz = idata->ic.blksz;
499 data.blocks = idata->ic.blocks;
500
501 sg_init_one(data.sg, idata->buf, idata->buf_bytes);
502
503 if (idata->ic.write_flag)
504 data.flags = MMC_DATA_WRITE;
505 else
506 data.flags = MMC_DATA_READ;
507
508
509 mmc_set_data_timeout(&data, card);
510
511
512 if (idata->ic.data_timeout_ns)
513 data.timeout_ns = idata->ic.data_timeout_ns;
514
515 if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
516
517
518
519
520
521
522
523
524
525 data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000;
526 }
527
528 mrq.data = &data;
529 }
530
531 mrq.cmd = &cmd;
532
533 mmc_get_card(card);
534
535 err = mmc_blk_part_switch(card, md);
536 if (err)
537 goto cmd_rel_host;
538
539 if (idata->ic.is_acmd) {
540 err = mmc_app_cmd(card->host, card);
541 if (err)
542 goto cmd_rel_host;
543 }
544
545 if (is_rpmb) {
546 err = mmc_set_blockcount(card, data.blocks,
547 idata->ic.write_flag & (1 << 31));
548 if (err)
549 goto cmd_rel_host;
550 }
551
552 if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) &&
553 (cmd.opcode == MMC_SWITCH)) {
554 err = ioctl_do_sanitize(card);
555
556 if (err)
557 pr_err("%s: ioctl_do_sanitize() failed. err = %d",
558 __func__, err);
559
560 goto cmd_rel_host;
561 }
562
563 mmc_wait_for_req(card->host, &mrq);
564
565 if (cmd.error) {
566 dev_err(mmc_dev(card->host), "%s: cmd error %d\n",
567 __func__, cmd.error);
568 err = cmd.error;
569 goto cmd_rel_host;
570 }
571 if (data.error) {
572 dev_err(mmc_dev(card->host), "%s: data error %d\n",
573 __func__, data.error);
574 err = data.error;
575 goto cmd_rel_host;
576 }
577
578
579
580
581
582 if (idata->ic.postsleep_min_us)
583 usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us);
584
585 if (copy_to_user(&(ic_ptr->response), cmd.resp, sizeof(cmd.resp))) {
586 err = -EFAULT;
587 goto cmd_rel_host;
588 }
589
590 if (!idata->ic.write_flag) {
591 if (copy_to_user((void __user *)(unsigned long) idata->ic.data_ptr,
592 idata->buf, idata->buf_bytes)) {
593 err = -EFAULT;
594 goto cmd_rel_host;
595 }
596 }
597
598 if (is_rpmb) {
599
600
601
602
603 err = ioctl_rpmb_card_status_poll(card, &status, 5);
604 if (err)
605 dev_err(mmc_dev(card->host),
606 "%s: Card Status=0x%08X, error %d\n",
607 __func__, status, err);
608 }
609
610cmd_rel_host:
611 mmc_put_card(card);
612
613cmd_done:
614 mmc_blk_put(md);
615cmd_err:
616 kfree(idata->buf);
617 kfree(idata);
618 return err;
619}
620
621static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode,
622 unsigned int cmd, unsigned long arg)
623{
624 int ret = -EINVAL;
625 if (cmd == MMC_IOC_CMD)
626 ret = mmc_blk_ioctl_cmd(bdev, (struct mmc_ioc_cmd __user *)arg);
627 return ret;
628}
629
630#ifdef CONFIG_COMPAT
631static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode,
632 unsigned int cmd, unsigned long arg)
633{
634 return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg));
635}
636#endif
637
638static const struct block_device_operations mmc_bdops = {
639 .open = mmc_blk_open,
640 .release = mmc_blk_release,
641 .getgeo = mmc_blk_getgeo,
642 .owner = THIS_MODULE,
643 .ioctl = mmc_blk_ioctl,
644#ifdef CONFIG_COMPAT
645 .compat_ioctl = mmc_blk_compat_ioctl,
646#endif
647};
648
649static inline int mmc_blk_part_switch(struct mmc_card *card,
650 struct mmc_blk_data *md)
651{
652 int ret;
653 struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev);
654
655 if (main_md->part_curr == md->part_type)
656 return 0;
657
658 if (mmc_card_mmc(card)) {
659 u8 part_config = card->ext_csd.part_config;
660
661 part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
662 part_config |= md->part_type;
663
664 ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
665 EXT_CSD_PART_CONFIG, part_config,
666 card->ext_csd.part_time);
667 if (ret)
668 return ret;
669
670 card->ext_csd.part_config = part_config;
671 }
672
673 main_md->part_curr = md->part_type;
674 return 0;
675}
676
677static u32 mmc_sd_num_wr_blocks(struct mmc_card *card)
678{
679 int err;
680 u32 result;
681 __be32 *blocks;
682
683 struct mmc_request mrq = {NULL};
684 struct mmc_command cmd = {0};
685 struct mmc_data data = {0};
686
687 struct scatterlist sg;
688
689 cmd.opcode = MMC_APP_CMD;
690 cmd.arg = card->rca << 16;
691 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
692
693 err = mmc_wait_for_cmd(card->host, &cmd, 0);
694 if (err)
695 return (u32)-1;
696 if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD))
697 return (u32)-1;
698
699 memset(&cmd, 0, sizeof(struct mmc_command));
700
701 cmd.opcode = SD_APP_SEND_NUM_WR_BLKS;
702 cmd.arg = 0;
703 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
704
705 data.blksz = 4;
706 data.blocks = 1;
707 data.flags = MMC_DATA_READ;
708 data.sg = &sg;
709 data.sg_len = 1;
710 mmc_set_data_timeout(&data, card);
711
712 mrq.cmd = &cmd;
713 mrq.data = &data;
714
715 blocks = kmalloc(4, GFP_KERNEL);
716 if (!blocks)
717 return (u32)-1;
718
719 sg_init_one(&sg, blocks, 4);
720
721 mmc_wait_for_req(card->host, &mrq);
722
723 result = ntohl(*blocks);
724 kfree(blocks);
725
726 if (cmd.error || data.error)
727 result = (u32)-1;
728
729 return result;
730}
731
732static int get_card_status(struct mmc_card *card, u32 *status, int retries)
733{
734 struct mmc_command cmd = {0};
735 int err;
736
737 cmd.opcode = MMC_SEND_STATUS;
738 if (!mmc_host_is_spi(card->host))
739 cmd.arg = card->rca << 16;
740 cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
741 err = mmc_wait_for_cmd(card->host, &cmd, retries);
742 if (err == 0)
743 *status = cmd.resp[0];
744 return err;
745}
746
747static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms,
748 bool hw_busy_detect, struct request *req, int *gen_err)
749{
750 unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
751 int err = 0;
752 u32 status;
753
754 do {
755 err = get_card_status(card, &status, 5);
756 if (err) {
757 pr_err("%s: error %d requesting status\n",
758 req->rq_disk->disk_name, err);
759 return err;
760 }
761
762 if (status & R1_ERROR) {
763 pr_err("%s: %s: error sending status cmd, status %#x\n",
764 req->rq_disk->disk_name, __func__, status);
765 *gen_err = 1;
766 }
767
768
769 if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) &&
770 hw_busy_detect)
771 break;
772
773
774
775
776
777 if (time_after(jiffies, timeout)) {
778 pr_err("%s: Card stuck in programming state! %s %s\n",
779 mmc_hostname(card->host),
780 req->rq_disk->disk_name, __func__);
781 return -ETIMEDOUT;
782 }
783
784
785
786
787
788
789 } while (!(status & R1_READY_FOR_DATA) ||
790 (R1_CURRENT_STATE(status) == R1_STATE_PRG));
791
792 return err;
793}
794
795static int send_stop(struct mmc_card *card, unsigned int timeout_ms,
796 struct request *req, int *gen_err, u32 *stop_status)
797{
798 struct mmc_host *host = card->host;
799 struct mmc_command cmd = {0};
800 int err;
801 bool use_r1b_resp = rq_data_dir(req) == WRITE;
802
803
804
805
806
807
808
809 if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout))
810 use_r1b_resp = false;
811
812 cmd.opcode = MMC_STOP_TRANSMISSION;
813 if (use_r1b_resp) {
814 cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
815 cmd.busy_timeout = timeout_ms;
816 } else {
817 cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
818 }
819
820 err = mmc_wait_for_cmd(host, &cmd, 5);
821 if (err)
822 return err;
823
824 *stop_status = cmd.resp[0];
825
826
827 if (rq_data_dir(req) == READ)
828 return 0;
829
830 if (!mmc_host_is_spi(host) &&
831 (*stop_status & R1_ERROR)) {
832 pr_err("%s: %s: general error sending stop command, resp %#x\n",
833 req->rq_disk->disk_name, __func__, *stop_status);
834 *gen_err = 1;
835 }
836
837 return card_busy_detect(card, timeout_ms, use_r1b_resp, req, gen_err);
838}
839
840#define ERR_NOMEDIUM 3
841#define ERR_RETRY 2
842#define ERR_ABORT 1
843#define ERR_CONTINUE 0
844
845static int mmc_blk_cmd_error(struct request *req, const char *name, int error,
846 bool status_valid, u32 status)
847{
848 switch (error) {
849 case -EILSEQ:
850
851 pr_err("%s: %s sending %s command, card status %#x\n",
852 req->rq_disk->disk_name, "response CRC error",
853 name, status);
854 return ERR_RETRY;
855
856 case -ETIMEDOUT:
857 pr_err("%s: %s sending %s command, card status %#x\n",
858 req->rq_disk->disk_name, "timed out", name, status);
859
860
861 if (!status_valid)
862 return ERR_RETRY;
863
864
865
866
867
868
869 if (status & (R1_COM_CRC_ERROR | R1_ILLEGAL_COMMAND))
870 return ERR_RETRY;
871
872
873 return ERR_ABORT;
874
875 default:
876
877 pr_err("%s: unknown error %d sending read/write command, card status %#x\n",
878 req->rq_disk->disk_name, error, status);
879 return ERR_ABORT;
880 }
881}
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req,
902 struct mmc_blk_request *brq, int *ecc_err, int *gen_err)
903{
904 bool prev_cmd_status_valid = true;
905 u32 status, stop_status = 0;
906 int err, retry;
907
908 if (mmc_card_removed(card))
909 return ERR_NOMEDIUM;
910
911
912
913
914
915
916 for (retry = 2; retry >= 0; retry--) {
917 err = get_card_status(card, &status, 0);
918 if (!err)
919 break;
920
921
922 mmc_retune_recheck(card->host);
923
924 prev_cmd_status_valid = false;
925 pr_err("%s: error %d sending status command, %sing\n",
926 req->rq_disk->disk_name, err, retry ? "retry" : "abort");
927 }
928
929
930 if (err) {
931
932 if (mmc_detect_card_removed(card->host))
933 return ERR_NOMEDIUM;
934 return ERR_ABORT;
935 }
936
937
938 if ((status & R1_CARD_ECC_FAILED) ||
939 (brq->stop.resp[0] & R1_CARD_ECC_FAILED) ||
940 (brq->cmd.resp[0] & R1_CARD_ECC_FAILED))
941 *ecc_err = 1;
942
943
944 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ)
945 if ((status & R1_ERROR) ||
946 (brq->stop.resp[0] & R1_ERROR)) {
947 pr_err("%s: %s: general error sending stop or status command, stop cmd response %#x, card status %#x\n",
948 req->rq_disk->disk_name, __func__,
949 brq->stop.resp[0], status);
950 *gen_err = 1;
951 }
952
953
954
955
956
957 if (R1_CURRENT_STATE(status) == R1_STATE_DATA ||
958 R1_CURRENT_STATE(status) == R1_STATE_RCV) {
959 err = send_stop(card,
960 DIV_ROUND_UP(brq->data.timeout_ns, 1000000),
961 req, gen_err, &stop_status);
962 if (err) {
963 pr_err("%s: error %d sending stop command\n",
964 req->rq_disk->disk_name, err);
965
966
967
968
969 return ERR_ABORT;
970 }
971
972 if (stop_status & R1_CARD_ECC_FAILED)
973 *ecc_err = 1;
974 }
975
976
977 if (brq->sbc.error)
978 return mmc_blk_cmd_error(req, "SET_BLOCK_COUNT", brq->sbc.error,
979 prev_cmd_status_valid, status);
980
981
982 if (brq->cmd.error)
983 return mmc_blk_cmd_error(req, "r/w cmd", brq->cmd.error,
984 prev_cmd_status_valid, status);
985
986
987 if (!brq->stop.error)
988 return ERR_CONTINUE;
989
990
991 pr_info("%s: error %d sending stop command, original cmd response %#x, card status %#x\n",
992 req->rq_disk->disk_name, brq->stop.error,
993 brq->cmd.resp[0], status);
994
995
996
997
998
999 if (stop_status) {
1000 brq->stop.resp[0] = stop_status;
1001 brq->stop.error = 0;
1002 }
1003 return ERR_CONTINUE;
1004}
1005
1006static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host,
1007 int type)
1008{
1009 int err;
1010
1011 if (md->reset_done & type)
1012 return -EEXIST;
1013
1014 md->reset_done |= type;
1015 err = mmc_hw_reset(host);
1016
1017 if (err != -EOPNOTSUPP) {
1018 struct mmc_blk_data *main_md =
1019 dev_get_drvdata(&host->card->dev);
1020 int part_err;
1021
1022 main_md->part_curr = main_md->part_type;
1023 part_err = mmc_blk_part_switch(host->card, md);
1024 if (part_err) {
1025
1026
1027
1028
1029 return -ENODEV;
1030 }
1031 }
1032 return err;
1033}
1034
1035static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type)
1036{
1037 md->reset_done &= ~type;
1038}
1039
1040int mmc_access_rpmb(struct mmc_queue *mq)
1041{
1042 struct mmc_blk_data *md = mq->data;
1043
1044
1045
1046 if (md && md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
1047 return true;
1048
1049 return false;
1050}
1051
1052static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
1053{
1054 struct mmc_blk_data *md = mq->data;
1055 struct mmc_card *card = md->queue.card;
1056 unsigned int from, nr, arg;
1057 int err = 0, type = MMC_BLK_DISCARD;
1058
1059 if (!mmc_can_erase(card)) {
1060 err = -EOPNOTSUPP;
1061 goto out;
1062 }
1063
1064 from = blk_rq_pos(req);
1065 nr = blk_rq_sectors(req);
1066
1067 if (mmc_can_discard(card))
1068 arg = MMC_DISCARD_ARG;
1069 else if (mmc_can_trim(card))
1070 arg = MMC_TRIM_ARG;
1071 else
1072 arg = MMC_ERASE_ARG;
1073retry:
1074 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1075 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1076 INAND_CMD38_ARG_EXT_CSD,
1077 arg == MMC_TRIM_ARG ?
1078 INAND_CMD38_ARG_TRIM :
1079 INAND_CMD38_ARG_ERASE,
1080 0);
1081 if (err)
1082 goto out;
1083 }
1084 err = mmc_erase(card, from, nr, arg);
1085out:
1086 if (err == -EIO && !mmc_blk_reset(md, card->host, type))
1087 goto retry;
1088 if (!err)
1089 mmc_blk_reset_success(md, type);
1090 blk_end_request(req, err, blk_rq_bytes(req));
1091
1092 return err ? 0 : 1;
1093}
1094
1095static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
1096 struct request *req)
1097{
1098 struct mmc_blk_data *md = mq->data;
1099 struct mmc_card *card = md->queue.card;
1100 unsigned int from, nr, arg;
1101 int err = 0, type = MMC_BLK_SECDISCARD;
1102
1103 if (!(mmc_can_secure_erase_trim(card))) {
1104 err = -EOPNOTSUPP;
1105 goto out;
1106 }
1107
1108 from = blk_rq_pos(req);
1109 nr = blk_rq_sectors(req);
1110
1111 if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr))
1112 arg = MMC_SECURE_TRIM1_ARG;
1113 else
1114 arg = MMC_SECURE_ERASE_ARG;
1115
1116retry:
1117 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1118 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1119 INAND_CMD38_ARG_EXT_CSD,
1120 arg == MMC_SECURE_TRIM1_ARG ?
1121 INAND_CMD38_ARG_SECTRIM1 :
1122 INAND_CMD38_ARG_SECERASE,
1123 0);
1124 if (err)
1125 goto out_retry;
1126 }
1127
1128 err = mmc_erase(card, from, nr, arg);
1129 if (err == -EIO)
1130 goto out_retry;
1131 if (err)
1132 goto out;
1133
1134 if (arg == MMC_SECURE_TRIM1_ARG) {
1135 if (card->quirks & MMC_QUIRK_INAND_CMD38) {
1136 err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
1137 INAND_CMD38_ARG_EXT_CSD,
1138 INAND_CMD38_ARG_SECTRIM2,
1139 0);
1140 if (err)
1141 goto out_retry;
1142 }
1143
1144 err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG);
1145 if (err == -EIO)
1146 goto out_retry;
1147 if (err)
1148 goto out;
1149 }
1150
1151out_retry:
1152 if (err && !mmc_blk_reset(md, card->host, type))
1153 goto retry;
1154 if (!err)
1155 mmc_blk_reset_success(md, type);
1156out:
1157 blk_end_request(req, err, blk_rq_bytes(req));
1158
1159 return err ? 0 : 1;
1160}
1161
1162static int mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req)
1163{
1164 struct mmc_blk_data *md = mq->data;
1165 struct mmc_card *card = md->queue.card;
1166 int ret = 0;
1167
1168 ret = mmc_flush_cache(card);
1169 if (ret)
1170 ret = -EIO;
1171
1172 blk_end_request_all(req, ret);
1173
1174 return ret ? 0 : 1;
1175}
1176
1177
1178
1179
1180
1181
1182
1183
1184static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq,
1185 struct mmc_card *card,
1186 struct request *req)
1187{
1188 if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) {
1189
1190 if (!IS_ALIGNED(brq->cmd.arg, card->ext_csd.rel_sectors))
1191 brq->data.blocks = 1;
1192
1193 if (brq->data.blocks > card->ext_csd.rel_sectors)
1194 brq->data.blocks = card->ext_csd.rel_sectors;
1195 else if (brq->data.blocks < card->ext_csd.rel_sectors)
1196 brq->data.blocks = 1;
1197 }
1198}
1199
1200#define CMD_ERRORS \
1201 (R1_OUT_OF_RANGE | \
1202 R1_ADDRESS_ERROR | \
1203 R1_BLOCK_LEN_ERROR | \
1204 R1_WP_VIOLATION | \
1205 R1_CC_ERROR | \
1206 R1_ERROR)
1207
1208static int mmc_blk_err_check(struct mmc_card *card,
1209 struct mmc_async_req *areq)
1210{
1211 struct mmc_queue_req *mq_mrq = container_of(areq, struct mmc_queue_req,
1212 mmc_active);
1213 struct mmc_blk_request *brq = &mq_mrq->brq;
1214 struct request *req = mq_mrq->req;
1215 int need_retune = card->host->need_retune;
1216 int ecc_err = 0, gen_err = 0;
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228 if (brq->sbc.error || brq->cmd.error || brq->stop.error ||
1229 brq->data.error) {
1230 switch (mmc_blk_cmd_recovery(card, req, brq, &ecc_err, &gen_err)) {
1231 case ERR_RETRY:
1232 return MMC_BLK_RETRY;
1233 case ERR_ABORT:
1234 return MMC_BLK_ABORT;
1235 case ERR_NOMEDIUM:
1236 return MMC_BLK_NOMEDIUM;
1237 case ERR_CONTINUE:
1238 break;
1239 }
1240 }
1241
1242
1243
1244
1245
1246
1247 if (brq->cmd.resp[0] & CMD_ERRORS) {
1248 pr_err("%s: r/w command failed, status = %#x\n",
1249 req->rq_disk->disk_name, brq->cmd.resp[0]);
1250 return MMC_BLK_ABORT;
1251 }
1252
1253
1254
1255
1256
1257
1258 if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) {
1259 int err;
1260
1261
1262 if (brq->stop.resp[0] & R1_ERROR) {
1263 pr_err("%s: %s: general error sending stop command, stop cmd response %#x\n",
1264 req->rq_disk->disk_name, __func__,
1265 brq->stop.resp[0]);
1266 gen_err = 1;
1267 }
1268
1269 err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, false, req,
1270 &gen_err);
1271 if (err)
1272 return MMC_BLK_CMD_ERR;
1273 }
1274
1275
1276 if (gen_err) {
1277 pr_warn("%s: retrying write for general error\n",
1278 req->rq_disk->disk_name);
1279 return MMC_BLK_RETRY;
1280 }
1281
1282 if (brq->data.error) {
1283 if (need_retune && !brq->retune_retry_done) {
1284 pr_info("%s: retrying because a re-tune was needed\n",
1285 req->rq_disk->disk_name);
1286 brq->retune_retry_done = 1;
1287 return MMC_BLK_RETRY;
1288 }
1289 pr_err("%s: error %d transferring data, sector %u, nr %u, cmd response %#x, card status %#x\n",
1290 req->rq_disk->disk_name, brq->data.error,
1291 (unsigned)blk_rq_pos(req),
1292 (unsigned)blk_rq_sectors(req),
1293 brq->cmd.resp[0], brq->stop.resp[0]);
1294
1295 if (rq_data_dir(req) == READ) {
1296 if (ecc_err)
1297 return MMC_BLK_ECC_ERR;
1298 return MMC_BLK_DATA_ERR;
1299 } else {
1300 return MMC_BLK_CMD_ERR;
1301 }
1302 }
1303
1304 if (!brq->data.bytes_xfered)
1305 return MMC_BLK_RETRY;
1306
1307 if (mmc_packed_cmd(mq_mrq->cmd_type)) {
1308 if (unlikely(brq->data.blocks << 9 != brq->data.bytes_xfered))
1309 return MMC_BLK_PARTIAL;
1310 else
1311 return MMC_BLK_SUCCESS;
1312 }
1313
1314 if (blk_rq_bytes(req) != brq->data.bytes_xfered)
1315 return MMC_BLK_PARTIAL;
1316
1317 return MMC_BLK_SUCCESS;
1318}
1319
1320static int mmc_blk_packed_err_check(struct mmc_card *card,
1321 struct mmc_async_req *areq)
1322{
1323 struct mmc_queue_req *mq_rq = container_of(areq, struct mmc_queue_req,
1324 mmc_active);
1325 struct request *req = mq_rq->req;
1326 struct mmc_packed *packed = mq_rq->packed;
1327 int err, check, status;
1328 u8 *ext_csd;
1329
1330 BUG_ON(!packed);
1331
1332 packed->retries--;
1333 check = mmc_blk_err_check(card, areq);
1334 err = get_card_status(card, &status, 0);
1335 if (err) {
1336 pr_err("%s: error %d sending status command\n",
1337 req->rq_disk->disk_name, err);
1338 return MMC_BLK_ABORT;
1339 }
1340
1341 if (status & R1_EXCEPTION_EVENT) {
1342 err = mmc_get_ext_csd(card, &ext_csd);
1343 if (err) {
1344 pr_err("%s: error %d sending ext_csd\n",
1345 req->rq_disk->disk_name, err);
1346 return MMC_BLK_ABORT;
1347 }
1348
1349 if ((ext_csd[EXT_CSD_EXP_EVENTS_STATUS] &
1350 EXT_CSD_PACKED_FAILURE) &&
1351 (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1352 EXT_CSD_PACKED_GENERIC_ERROR)) {
1353 if (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
1354 EXT_CSD_PACKED_INDEXED_ERROR) {
1355 packed->idx_failure =
1356 ext_csd[EXT_CSD_PACKED_FAILURE_INDEX] - 1;
1357 check = MMC_BLK_PARTIAL;
1358 }
1359 pr_err("%s: packed cmd failed, nr %u, sectors %u, "
1360 "failure index: %d\n",
1361 req->rq_disk->disk_name, packed->nr_entries,
1362 packed->blocks, packed->idx_failure);
1363 }
1364 kfree(ext_csd);
1365 }
1366
1367 return check;
1368}
1369
1370static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
1371 struct mmc_card *card,
1372 int disable_multi,
1373 struct mmc_queue *mq)
1374{
1375 u32 readcmd, writecmd;
1376 struct mmc_blk_request *brq = &mqrq->brq;
1377 struct request *req = mqrq->req;
1378 struct mmc_blk_data *md = mq->data;
1379 bool do_data_tag;
1380
1381
1382
1383
1384
1385
1386
1387
1388 bool do_rel_wr = ((req->cmd_flags & REQ_FUA) ||
1389 (req->cmd_flags & REQ_META)) &&
1390 (rq_data_dir(req) == WRITE) &&
1391 (md->flags & MMC_BLK_REL_WR);
1392
1393 memset(brq, 0, sizeof(struct mmc_blk_request));
1394 brq->mrq.cmd = &brq->cmd;
1395 brq->mrq.data = &brq->data;
1396
1397 brq->cmd.arg = blk_rq_pos(req);
1398 if (!mmc_card_blockaddr(card))
1399 brq->cmd.arg <<= 9;
1400 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1401 brq->data.blksz = 512;
1402 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1403 brq->stop.arg = 0;
1404 brq->data.blocks = blk_rq_sectors(req);
1405
1406
1407
1408
1409
1410
1411 if (brq->data.blocks > card->host->max_blk_count)
1412 brq->data.blocks = card->host->max_blk_count;
1413
1414 if (brq->data.blocks > 1) {
1415
1416
1417
1418
1419
1420 if (disable_multi)
1421 brq->data.blocks = 1;
1422
1423
1424
1425
1426
1427 if (card->host->ops->multi_io_quirk)
1428 brq->data.blocks = card->host->ops->multi_io_quirk(card,
1429 (rq_data_dir(req) == READ) ?
1430 MMC_DATA_READ : MMC_DATA_WRITE,
1431 brq->data.blocks);
1432 }
1433
1434 if (brq->data.blocks > 1 || do_rel_wr) {
1435
1436
1437
1438 if (!mmc_host_is_spi(card->host) ||
1439 rq_data_dir(req) == READ)
1440 brq->mrq.stop = &brq->stop;
1441 readcmd = MMC_READ_MULTIPLE_BLOCK;
1442 writecmd = MMC_WRITE_MULTIPLE_BLOCK;
1443 } else {
1444 brq->mrq.stop = NULL;
1445 readcmd = MMC_READ_SINGLE_BLOCK;
1446 writecmd = MMC_WRITE_BLOCK;
1447 }
1448 if (rq_data_dir(req) == READ) {
1449 brq->cmd.opcode = readcmd;
1450 brq->data.flags |= MMC_DATA_READ;
1451 if (brq->mrq.stop)
1452 brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 |
1453 MMC_CMD_AC;
1454 } else {
1455 brq->cmd.opcode = writecmd;
1456 brq->data.flags |= MMC_DATA_WRITE;
1457 if (brq->mrq.stop)
1458 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B |
1459 MMC_CMD_AC;
1460 }
1461
1462 if (do_rel_wr)
1463 mmc_apply_rel_rw(brq, card, req);
1464
1465
1466
1467
1468
1469 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1470 (req->cmd_flags & REQ_META) &&
1471 (rq_data_dir(req) == WRITE) &&
1472 ((brq->data.blocks * brq->data.blksz) >=
1473 card->ext_csd.data_tag_unit_size);
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493 if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) &&
1494 (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) ||
1495 do_data_tag)) {
1496 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1497 brq->sbc.arg = brq->data.blocks |
1498 (do_rel_wr ? (1 << 31) : 0) |
1499 (do_data_tag ? (1 << 29) : 0);
1500 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1501 brq->mrq.sbc = &brq->sbc;
1502 }
1503
1504 mmc_set_data_timeout(&brq->data, card);
1505
1506 brq->data.sg = mqrq->sg;
1507 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1508
1509
1510
1511
1512
1513 if (brq->data.blocks != blk_rq_sectors(req)) {
1514 int i, data_size = brq->data.blocks << 9;
1515 struct scatterlist *sg;
1516
1517 for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) {
1518 data_size -= sg->length;
1519 if (data_size <= 0) {
1520 sg->length += data_size;
1521 i++;
1522 break;
1523 }
1524 }
1525 brq->data.sg_len = i;
1526 }
1527
1528 mqrq->mmc_active.mrq = &brq->mrq;
1529 mqrq->mmc_active.err_check = mmc_blk_err_check;
1530
1531 mmc_queue_bounce_pre(mqrq);
1532}
1533
1534static inline u8 mmc_calc_packed_hdr_segs(struct request_queue *q,
1535 struct mmc_card *card)
1536{
1537 unsigned int hdr_sz = mmc_large_sector(card) ? 4096 : 512;
1538 unsigned int max_seg_sz = queue_max_segment_size(q);
1539 unsigned int len, nr_segs = 0;
1540
1541 do {
1542 len = min(hdr_sz, max_seg_sz);
1543 hdr_sz -= len;
1544 nr_segs++;
1545 } while (hdr_sz);
1546
1547 return nr_segs;
1548}
1549
1550static u8 mmc_blk_prep_packed_list(struct mmc_queue *mq, struct request *req)
1551{
1552 struct request_queue *q = mq->queue;
1553 struct mmc_card *card = mq->card;
1554 struct request *cur = req, *next = NULL;
1555 struct mmc_blk_data *md = mq->data;
1556 struct mmc_queue_req *mqrq = mq->mqrq_cur;
1557 bool en_rel_wr = card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN;
1558 unsigned int req_sectors = 0, phys_segments = 0;
1559 unsigned int max_blk_count, max_phys_segs;
1560 bool put_back = true;
1561 u8 max_packed_rw = 0;
1562 u8 reqs = 0;
1563
1564 if (!(md->flags & MMC_BLK_PACKED_CMD))
1565 goto no_packed;
1566
1567 if ((rq_data_dir(cur) == WRITE) &&
1568 mmc_host_packed_wr(card->host))
1569 max_packed_rw = card->ext_csd.max_packed_writes;
1570
1571 if (max_packed_rw == 0)
1572 goto no_packed;
1573
1574 if (mmc_req_rel_wr(cur) &&
1575 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1576 goto no_packed;
1577
1578 if (mmc_large_sector(card) &&
1579 !IS_ALIGNED(blk_rq_sectors(cur), 8))
1580 goto no_packed;
1581
1582 mmc_blk_clear_packed(mqrq);
1583
1584 max_blk_count = min(card->host->max_blk_count,
1585 card->host->max_req_size >> 9);
1586 if (unlikely(max_blk_count > 0xffff))
1587 max_blk_count = 0xffff;
1588
1589 max_phys_segs = queue_max_segments(q);
1590 req_sectors += blk_rq_sectors(cur);
1591 phys_segments += cur->nr_phys_segments;
1592
1593 if (rq_data_dir(cur) == WRITE) {
1594 req_sectors += mmc_large_sector(card) ? 8 : 1;
1595 phys_segments += mmc_calc_packed_hdr_segs(q, card);
1596 }
1597
1598 do {
1599 if (reqs >= max_packed_rw - 1) {
1600 put_back = false;
1601 break;
1602 }
1603
1604 spin_lock_irq(q->queue_lock);
1605 next = blk_fetch_request(q);
1606 spin_unlock_irq(q->queue_lock);
1607 if (!next) {
1608 put_back = false;
1609 break;
1610 }
1611
1612 if (mmc_large_sector(card) &&
1613 !IS_ALIGNED(blk_rq_sectors(next), 8))
1614 break;
1615
1616 if (next->cmd_flags & REQ_DISCARD ||
1617 next->cmd_flags & REQ_FLUSH)
1618 break;
1619
1620 if (rq_data_dir(cur) != rq_data_dir(next))
1621 break;
1622
1623 if (mmc_req_rel_wr(next) &&
1624 (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
1625 break;
1626
1627 req_sectors += blk_rq_sectors(next);
1628 if (req_sectors > max_blk_count)
1629 break;
1630
1631 phys_segments += next->nr_phys_segments;
1632 if (phys_segments > max_phys_segs)
1633 break;
1634
1635 list_add_tail(&next->queuelist, &mqrq->packed->list);
1636 cur = next;
1637 reqs++;
1638 } while (1);
1639
1640 if (put_back) {
1641 spin_lock_irq(q->queue_lock);
1642 blk_requeue_request(q, next);
1643 spin_unlock_irq(q->queue_lock);
1644 }
1645
1646 if (reqs > 0) {
1647 list_add(&req->queuelist, &mqrq->packed->list);
1648 mqrq->packed->nr_entries = ++reqs;
1649 mqrq->packed->retries = reqs;
1650 return reqs;
1651 }
1652
1653no_packed:
1654 mqrq->cmd_type = MMC_PACKED_NONE;
1655 return 0;
1656}
1657
1658static void mmc_blk_packed_hdr_wrq_prep(struct mmc_queue_req *mqrq,
1659 struct mmc_card *card,
1660 struct mmc_queue *mq)
1661{
1662 struct mmc_blk_request *brq = &mqrq->brq;
1663 struct request *req = mqrq->req;
1664 struct request *prq;
1665 struct mmc_blk_data *md = mq->data;
1666 struct mmc_packed *packed = mqrq->packed;
1667 bool do_rel_wr, do_data_tag;
1668 u32 *packed_cmd_hdr;
1669 u8 hdr_blocks;
1670 u8 i = 1;
1671
1672 BUG_ON(!packed);
1673
1674 mqrq->cmd_type = MMC_PACKED_WRITE;
1675 packed->blocks = 0;
1676 packed->idx_failure = MMC_PACKED_NR_IDX;
1677
1678 packed_cmd_hdr = packed->cmd_hdr;
1679 memset(packed_cmd_hdr, 0, sizeof(packed->cmd_hdr));
1680 packed_cmd_hdr[0] = (packed->nr_entries << 16) |
1681 (PACKED_CMD_WR << 8) | PACKED_CMD_VER;
1682 hdr_blocks = mmc_large_sector(card) ? 8 : 1;
1683
1684
1685
1686
1687 list_for_each_entry(prq, &packed->list, queuelist) {
1688 do_rel_wr = mmc_req_rel_wr(prq) && (md->flags & MMC_BLK_REL_WR);
1689 do_data_tag = (card->ext_csd.data_tag_unit_size) &&
1690 (prq->cmd_flags & REQ_META) &&
1691 (rq_data_dir(prq) == WRITE) &&
1692 ((brq->data.blocks * brq->data.blksz) >=
1693 card->ext_csd.data_tag_unit_size);
1694
1695 packed_cmd_hdr[(i * 2)] =
1696 (do_rel_wr ? MMC_CMD23_ARG_REL_WR : 0) |
1697 (do_data_tag ? MMC_CMD23_ARG_TAG_REQ : 0) |
1698 blk_rq_sectors(prq);
1699
1700 packed_cmd_hdr[((i * 2)) + 1] =
1701 mmc_card_blockaddr(card) ?
1702 blk_rq_pos(prq) : blk_rq_pos(prq) << 9;
1703 packed->blocks += blk_rq_sectors(prq);
1704 i++;
1705 }
1706
1707 memset(brq, 0, sizeof(struct mmc_blk_request));
1708 brq->mrq.cmd = &brq->cmd;
1709 brq->mrq.data = &brq->data;
1710 brq->mrq.sbc = &brq->sbc;
1711 brq->mrq.stop = &brq->stop;
1712
1713 brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
1714 brq->sbc.arg = MMC_CMD23_ARG_PACKED | (packed->blocks + hdr_blocks);
1715 brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
1716
1717 brq->cmd.opcode = MMC_WRITE_MULTIPLE_BLOCK;
1718 brq->cmd.arg = blk_rq_pos(req);
1719 if (!mmc_card_blockaddr(card))
1720 brq->cmd.arg <<= 9;
1721 brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
1722
1723 brq->data.blksz = 512;
1724 brq->data.blocks = packed->blocks + hdr_blocks;
1725 brq->data.flags |= MMC_DATA_WRITE;
1726
1727 brq->stop.opcode = MMC_STOP_TRANSMISSION;
1728 brq->stop.arg = 0;
1729 brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
1730
1731 mmc_set_data_timeout(&brq->data, card);
1732
1733 brq->data.sg = mqrq->sg;
1734 brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);
1735
1736 mqrq->mmc_active.mrq = &brq->mrq;
1737 mqrq->mmc_active.err_check = mmc_blk_packed_err_check;
1738
1739 mmc_queue_bounce_pre(mqrq);
1740}
1741
1742static int mmc_blk_cmd_err(struct mmc_blk_data *md, struct mmc_card *card,
1743 struct mmc_blk_request *brq, struct request *req,
1744 int ret)
1745{
1746 struct mmc_queue_req *mq_rq;
1747 mq_rq = container_of(brq, struct mmc_queue_req, brq);
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757 if (mmc_card_sd(card)) {
1758 u32 blocks;
1759
1760 blocks = mmc_sd_num_wr_blocks(card);
1761 if (blocks != (u32)-1) {
1762 ret = blk_end_request(req, 0, blocks << 9);
1763 }
1764 } else {
1765 if (!mmc_packed_cmd(mq_rq->cmd_type))
1766 ret = blk_end_request(req, 0, brq->data.bytes_xfered);
1767 }
1768 return ret;
1769}
1770
1771static int mmc_blk_end_packed_req(struct mmc_queue_req *mq_rq)
1772{
1773 struct request *prq;
1774 struct mmc_packed *packed = mq_rq->packed;
1775 int idx = packed->idx_failure, i = 0;
1776 int ret = 0;
1777
1778 BUG_ON(!packed);
1779
1780 while (!list_empty(&packed->list)) {
1781 prq = list_entry_rq(packed->list.next);
1782 if (idx == i) {
1783
1784 packed->nr_entries -= idx;
1785 mq_rq->req = prq;
1786 ret = 1;
1787
1788 if (packed->nr_entries == MMC_PACKED_NR_SINGLE) {
1789 list_del_init(&prq->queuelist);
1790 mmc_blk_clear_packed(mq_rq);
1791 }
1792 return ret;
1793 }
1794 list_del_init(&prq->queuelist);
1795 blk_end_request(prq, 0, blk_rq_bytes(prq));
1796 i++;
1797 }
1798
1799 mmc_blk_clear_packed(mq_rq);
1800 return ret;
1801}
1802
1803static void mmc_blk_abort_packed_req(struct mmc_queue_req *mq_rq)
1804{
1805 struct request *prq;
1806 struct mmc_packed *packed = mq_rq->packed;
1807
1808 BUG_ON(!packed);
1809
1810 while (!list_empty(&packed->list)) {
1811 prq = list_entry_rq(packed->list.next);
1812 list_del_init(&prq->queuelist);
1813 blk_end_request(prq, -EIO, blk_rq_bytes(prq));
1814 }
1815
1816 mmc_blk_clear_packed(mq_rq);
1817}
1818
1819static void mmc_blk_revert_packed_req(struct mmc_queue *mq,
1820 struct mmc_queue_req *mq_rq)
1821{
1822 struct request *prq;
1823 struct request_queue *q = mq->queue;
1824 struct mmc_packed *packed = mq_rq->packed;
1825
1826 BUG_ON(!packed);
1827
1828 while (!list_empty(&packed->list)) {
1829 prq = list_entry_rq(packed->list.prev);
1830 if (prq->queuelist.prev != &packed->list) {
1831 list_del_init(&prq->queuelist);
1832 spin_lock_irq(q->queue_lock);
1833 blk_requeue_request(mq->queue, prq);
1834 spin_unlock_irq(q->queue_lock);
1835 } else {
1836 list_del_init(&prq->queuelist);
1837 }
1838 }
1839
1840 mmc_blk_clear_packed(mq_rq);
1841}
1842
1843static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc)
1844{
1845 struct mmc_blk_data *md = mq->data;
1846 struct mmc_card *card = md->queue.card;
1847 struct mmc_blk_request *brq = &mq->mqrq_cur->brq;
1848 int ret = 1, disable_multi = 0, retry = 0, type, retune_retry_done = 0;
1849 enum mmc_blk_status status;
1850 struct mmc_queue_req *mq_rq;
1851 struct request *req = rqc;
1852 struct mmc_async_req *areq;
1853 const u8 packed_nr = 2;
1854 u8 reqs = 0;
1855
1856 if (!rqc && !mq->mqrq_prev->req)
1857 return 0;
1858
1859 if (rqc)
1860 reqs = mmc_blk_prep_packed_list(mq, rqc);
1861
1862 do {
1863 if (rqc) {
1864
1865
1866
1867
1868 if ((brq->data.blocks & 0x07) &&
1869 (card->ext_csd.data_sector_size == 4096)) {
1870 pr_err("%s: Transfer size is not 4KB sector size aligned\n",
1871 req->rq_disk->disk_name);
1872 mq_rq = mq->mqrq_cur;
1873 goto cmd_abort;
1874 }
1875
1876 if (reqs >= packed_nr)
1877 mmc_blk_packed_hdr_wrq_prep(mq->mqrq_cur,
1878 card, mq);
1879 else
1880 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
1881 areq = &mq->mqrq_cur->mmc_active;
1882 } else
1883 areq = NULL;
1884 areq = mmc_start_req(card->host, areq, (int *) &status);
1885 if (!areq) {
1886 if (status == MMC_BLK_NEW_REQUEST)
1887 mq->flags |= MMC_QUEUE_NEW_REQUEST;
1888 return 0;
1889 }
1890
1891 mq_rq = container_of(areq, struct mmc_queue_req, mmc_active);
1892 brq = &mq_rq->brq;
1893 req = mq_rq->req;
1894 type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
1895 mmc_queue_bounce_post(mq_rq);
1896
1897 switch (status) {
1898 case MMC_BLK_SUCCESS:
1899 case MMC_BLK_PARTIAL:
1900
1901
1902
1903 mmc_blk_reset_success(md, type);
1904
1905 if (mmc_packed_cmd(mq_rq->cmd_type)) {
1906 ret = mmc_blk_end_packed_req(mq_rq);
1907 break;
1908 } else {
1909 ret = blk_end_request(req, 0,
1910 brq->data.bytes_xfered);
1911 }
1912
1913
1914
1915
1916
1917
1918 if (status == MMC_BLK_SUCCESS && ret) {
1919 pr_err("%s BUG rq_tot %d d_xfer %d\n",
1920 __func__, blk_rq_bytes(req),
1921 brq->data.bytes_xfered);
1922 rqc = NULL;
1923 goto cmd_abort;
1924 }
1925 break;
1926 case MMC_BLK_CMD_ERR:
1927 ret = mmc_blk_cmd_err(md, card, brq, req, ret);
1928 if (mmc_blk_reset(md, card->host, type))
1929 goto cmd_abort;
1930 if (!ret)
1931 goto start_new_req;
1932 break;
1933 case MMC_BLK_RETRY:
1934 retune_retry_done = brq->retune_retry_done;
1935 if (retry++ < 5)
1936 break;
1937
1938 case MMC_BLK_ABORT:
1939 if (!mmc_blk_reset(md, card->host, type))
1940 break;
1941 goto cmd_abort;
1942 case MMC_BLK_DATA_ERR: {
1943 int err;
1944
1945 err = mmc_blk_reset(md, card->host, type);
1946 if (!err)
1947 break;
1948 if (err == -ENODEV ||
1949 mmc_packed_cmd(mq_rq->cmd_type))
1950 goto cmd_abort;
1951
1952 }
1953 case MMC_BLK_ECC_ERR:
1954 if (brq->data.blocks > 1) {
1955
1956 pr_warn("%s: retrying using single block read\n",
1957 req->rq_disk->disk_name);
1958 disable_multi = 1;
1959 break;
1960 }
1961
1962
1963
1964
1965
1966 ret = blk_end_request(req, -EIO,
1967 brq->data.blksz);
1968 if (!ret)
1969 goto start_new_req;
1970 break;
1971 case MMC_BLK_NOMEDIUM:
1972 goto cmd_abort;
1973 default:
1974 pr_err("%s: Unhandled return value (%d)",
1975 req->rq_disk->disk_name, status);
1976 goto cmd_abort;
1977 }
1978
1979 if (ret) {
1980 if (mmc_packed_cmd(mq_rq->cmd_type)) {
1981 if (!mq_rq->packed->retries)
1982 goto cmd_abort;
1983 mmc_blk_packed_hdr_wrq_prep(mq_rq, card, mq);
1984 mmc_start_req(card->host,
1985 &mq_rq->mmc_active, NULL);
1986 } else {
1987
1988
1989
1990
1991
1992 mmc_blk_rw_rq_prep(mq_rq, card,
1993 disable_multi, mq);
1994 mmc_start_req(card->host,
1995 &mq_rq->mmc_active, NULL);
1996 }
1997 mq_rq->brq.retune_retry_done = retune_retry_done;
1998 }
1999 } while (ret);
2000
2001 return 1;
2002
2003 cmd_abort:
2004 if (mmc_packed_cmd(mq_rq->cmd_type)) {
2005 mmc_blk_abort_packed_req(mq_rq);
2006 } else {
2007 if (mmc_card_removed(card))
2008 req->cmd_flags |= REQ_QUIET;
2009 while (ret)
2010 ret = blk_end_request(req, -EIO,
2011 blk_rq_cur_bytes(req));
2012 }
2013
2014 start_new_req:
2015 if (rqc) {
2016 if (mmc_card_removed(card)) {
2017 rqc->cmd_flags |= REQ_QUIET;
2018 blk_end_request_all(rqc, -EIO);
2019 } else {
2020
2021
2022
2023 if (mmc_packed_cmd(mq->mqrq_cur->cmd_type))
2024 mmc_blk_revert_packed_req(mq, mq->mqrq_cur);
2025
2026 mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
2027 mmc_start_req(card->host,
2028 &mq->mqrq_cur->mmc_active, NULL);
2029 }
2030 }
2031
2032 return 0;
2033}
2034
2035static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
2036{
2037 int ret;
2038 struct mmc_blk_data *md = mq->data;
2039 struct mmc_card *card = md->queue.card;
2040 struct mmc_host *host = card->host;
2041 unsigned long flags;
2042 unsigned int cmd_flags = req ? req->cmd_flags : 0;
2043
2044 if (req && !mq->mqrq_prev->req)
2045
2046 mmc_get_card(card);
2047
2048 ret = mmc_blk_part_switch(card, md);
2049 if (ret) {
2050 if (req) {
2051 blk_end_request_all(req, -EIO);
2052 }
2053 ret = 0;
2054 goto out;
2055 }
2056
2057 mq->flags &= ~MMC_QUEUE_NEW_REQUEST;
2058 if (cmd_flags & REQ_DISCARD) {
2059
2060 if (card->host->areq)
2061 mmc_blk_issue_rw_rq(mq, NULL);
2062 if (req->cmd_flags & REQ_SECURE)
2063 ret = mmc_blk_issue_secdiscard_rq(mq, req);
2064 else
2065 ret = mmc_blk_issue_discard_rq(mq, req);
2066 } else if (cmd_flags & REQ_FLUSH) {
2067
2068 if (card->host->areq)
2069 mmc_blk_issue_rw_rq(mq, NULL);
2070 ret = mmc_blk_issue_flush(mq, req);
2071 } else {
2072 if (!req && host->areq) {
2073 spin_lock_irqsave(&host->context_info.lock, flags);
2074 host->context_info.is_waiting_last_req = true;
2075 spin_unlock_irqrestore(&host->context_info.lock, flags);
2076 }
2077 ret = mmc_blk_issue_rw_rq(mq, req);
2078 }
2079
2080out:
2081 if ((!req && !(mq->flags & MMC_QUEUE_NEW_REQUEST)) ||
2082 (cmd_flags & MMC_REQ_SPECIAL_MASK))
2083
2084
2085
2086
2087
2088
2089 mmc_put_card(card);
2090 return ret;
2091}
2092
2093static inline int mmc_blk_readonly(struct mmc_card *card)
2094{
2095 return mmc_card_readonly(card) ||
2096 !(card->csd.cmdclass & CCC_BLOCK_WRITE);
2097}
2098
2099static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
2100 struct device *parent,
2101 sector_t size,
2102 bool default_ro,
2103 const char *subname,
2104 int area_type)
2105{
2106 struct mmc_blk_data *md;
2107 int devidx, ret;
2108
2109 devidx = find_first_zero_bit(dev_use, max_devices);
2110 if (devidx >= max_devices)
2111 return ERR_PTR(-ENOSPC);
2112 __set_bit(devidx, dev_use);
2113
2114 md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL);
2115 if (!md) {
2116 ret = -ENOMEM;
2117 goto out;
2118 }
2119
2120
2121
2122
2123
2124
2125
2126 if (!subname) {
2127 md->name_idx = find_first_zero_bit(name_use, max_devices);
2128 __set_bit(md->name_idx, name_use);
2129 } else
2130 md->name_idx = ((struct mmc_blk_data *)
2131 dev_to_disk(parent)->private_data)->name_idx;
2132
2133 md->area_type = area_type;
2134
2135
2136
2137
2138
2139 md->read_only = mmc_blk_readonly(card);
2140
2141 md->disk = alloc_disk(perdev_minors);
2142 if (md->disk == NULL) {
2143 ret = -ENOMEM;
2144 goto err_kfree;
2145 }
2146
2147 spin_lock_init(&md->lock);
2148 INIT_LIST_HEAD(&md->part);
2149 md->usage = 1;
2150
2151 ret = mmc_init_queue(&md->queue, card, &md->lock, subname);
2152 if (ret)
2153 goto err_putdisk;
2154
2155 md->queue.issue_fn = mmc_blk_issue_rq;
2156 md->queue.data = md;
2157
2158 md->disk->major = MMC_BLOCK_MAJOR;
2159 md->disk->first_minor = devidx * perdev_minors;
2160 md->disk->fops = &mmc_bdops;
2161 md->disk->private_data = md;
2162 md->disk->queue = md->queue.queue;
2163 md->disk->driverfs_dev = parent;
2164 set_disk_ro(md->disk, md->read_only || default_ro);
2165 if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT))
2166 md->disk->flags |= GENHD_FL_NO_PART_SCAN;
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180 snprintf(md->disk->disk_name, sizeof(md->disk->disk_name),
2181 "mmcblk%u%s", md->name_idx, subname ? subname : "");
2182
2183 if (mmc_card_mmc(card))
2184 blk_queue_logical_block_size(md->queue.queue,
2185 card->ext_csd.data_sector_size);
2186 else
2187 blk_queue_logical_block_size(md->queue.queue, 512);
2188
2189 set_capacity(md->disk, size);
2190
2191 if (mmc_host_cmd23(card->host)) {
2192 if (mmc_card_mmc(card) ||
2193 (mmc_card_sd(card) &&
2194 card->scr.cmds & SD_SCR_CMD23_SUPPORT))
2195 md->flags |= MMC_BLK_CMD23;
2196 }
2197
2198 if (mmc_card_mmc(card) &&
2199 md->flags & MMC_BLK_CMD23 &&
2200 ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) ||
2201 card->ext_csd.rel_sectors)) {
2202 md->flags |= MMC_BLK_REL_WR;
2203 blk_queue_flush(md->queue.queue, REQ_FLUSH | REQ_FUA);
2204 }
2205
2206 if (mmc_card_mmc(card) &&
2207 (area_type == MMC_BLK_DATA_AREA_MAIN) &&
2208 (md->flags & MMC_BLK_CMD23) &&
2209 card->ext_csd.packed_event_en) {
2210 if (!mmc_packed_init(&md->queue, card))
2211 md->flags |= MMC_BLK_PACKED_CMD;
2212 }
2213
2214 return md;
2215
2216 err_putdisk:
2217 put_disk(md->disk);
2218 err_kfree:
2219 kfree(md);
2220 out:
2221 return ERR_PTR(ret);
2222}
2223
2224static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
2225{
2226 sector_t size;
2227
2228 if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) {
2229
2230
2231
2232
2233 size = card->ext_csd.sectors;
2234 } else {
2235
2236
2237
2238
2239 size = (typeof(sector_t))card->csd.capacity
2240 << (card->csd.read_blkbits - 9);
2241 }
2242
2243 return mmc_blk_alloc_req(card, &card->dev, size, false, NULL,
2244 MMC_BLK_DATA_AREA_MAIN);
2245}
2246
2247static int mmc_blk_alloc_part(struct mmc_card *card,
2248 struct mmc_blk_data *md,
2249 unsigned int part_type,
2250 sector_t size,
2251 bool default_ro,
2252 const char *subname,
2253 int area_type)
2254{
2255 char cap_str[10];
2256 struct mmc_blk_data *part_md;
2257
2258 part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro,
2259 subname, area_type);
2260 if (IS_ERR(part_md))
2261 return PTR_ERR(part_md);
2262 part_md->part_type = part_type;
2263 list_add(&part_md->part, &md->part);
2264
2265 string_get_size((u64)get_capacity(part_md->disk), 512, STRING_UNITS_2,
2266 cap_str, sizeof(cap_str));
2267 pr_info("%s: %s %s partition %u %s\n",
2268 part_md->disk->disk_name, mmc_card_id(card),
2269 mmc_card_name(card), part_md->part_type, cap_str);
2270 return 0;
2271}
2272
2273
2274
2275
2276
2277
2278
2279static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md)
2280{
2281 int idx, ret = 0;
2282
2283 if (!mmc_card_mmc(card))
2284 return 0;
2285
2286 for (idx = 0; idx < card->nr_parts; idx++) {
2287 if (card->part[idx].size) {
2288 ret = mmc_blk_alloc_part(card, md,
2289 card->part[idx].part_cfg,
2290 card->part[idx].size >> 9,
2291 card->part[idx].force_ro,
2292 card->part[idx].name,
2293 card->part[idx].area_type);
2294 if (ret)
2295 return ret;
2296 }
2297 }
2298
2299 return ret;
2300}
2301
2302static void mmc_blk_remove_req(struct mmc_blk_data *md)
2303{
2304 struct mmc_card *card;
2305
2306 if (md) {
2307
2308
2309
2310
2311
2312 card = md->queue.card;
2313 mmc_cleanup_queue(&md->queue);
2314 if (md->flags & MMC_BLK_PACKED_CMD)
2315 mmc_packed_clean(&md->queue);
2316 if (md->disk->flags & GENHD_FL_UP) {
2317 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2318 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2319 card->ext_csd.boot_ro_lockable)
2320 device_remove_file(disk_to_dev(md->disk),
2321 &md->power_ro_lock);
2322
2323 del_gendisk(md->disk);
2324 }
2325 mmc_blk_put(md);
2326 }
2327}
2328
2329static void mmc_blk_remove_parts(struct mmc_card *card,
2330 struct mmc_blk_data *md)
2331{
2332 struct list_head *pos, *q;
2333 struct mmc_blk_data *part_md;
2334
2335 __clear_bit(md->name_idx, name_use);
2336 list_for_each_safe(pos, q, &md->part) {
2337 part_md = list_entry(pos, struct mmc_blk_data, part);
2338 list_del(pos);
2339 mmc_blk_remove_req(part_md);
2340 }
2341}
2342
2343static int mmc_add_disk(struct mmc_blk_data *md)
2344{
2345 int ret;
2346 struct mmc_card *card = md->queue.card;
2347
2348 add_disk(md->disk);
2349 md->force_ro.show = force_ro_show;
2350 md->force_ro.store = force_ro_store;
2351 sysfs_attr_init(&md->force_ro.attr);
2352 md->force_ro.attr.name = "force_ro";
2353 md->force_ro.attr.mode = S_IRUGO | S_IWUSR;
2354 ret = device_create_file(disk_to_dev(md->disk), &md->force_ro);
2355 if (ret)
2356 goto force_ro_fail;
2357
2358 if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
2359 card->ext_csd.boot_ro_lockable) {
2360 umode_t mode;
2361
2362 if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS)
2363 mode = S_IRUGO;
2364 else
2365 mode = S_IRUGO | S_IWUSR;
2366
2367 md->power_ro_lock.show = power_ro_lock_show;
2368 md->power_ro_lock.store = power_ro_lock_store;
2369 sysfs_attr_init(&md->power_ro_lock.attr);
2370 md->power_ro_lock.attr.mode = mode;
2371 md->power_ro_lock.attr.name =
2372 "ro_lock_until_next_power_on";
2373 ret = device_create_file(disk_to_dev(md->disk),
2374 &md->power_ro_lock);
2375 if (ret)
2376 goto power_ro_lock_fail;
2377 }
2378 return ret;
2379
2380power_ro_lock_fail:
2381 device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2382force_ro_fail:
2383 del_gendisk(md->disk);
2384
2385 return ret;
2386}
2387
2388#define CID_MANFID_SANDISK 0x2
2389#define CID_MANFID_TOSHIBA 0x11
2390#define CID_MANFID_MICRON 0x13
2391#define CID_MANFID_SAMSUNG 0x15
2392#define CID_MANFID_KINGSTON 0x70
2393
2394static const struct mmc_fixup blk_fixups[] =
2395{
2396 MMC_FIXUP("SEM02G", CID_MANFID_SANDISK, 0x100, add_quirk,
2397 MMC_QUIRK_INAND_CMD38),
2398 MMC_FIXUP("SEM04G", CID_MANFID_SANDISK, 0x100, add_quirk,
2399 MMC_QUIRK_INAND_CMD38),
2400 MMC_FIXUP("SEM08G", CID_MANFID_SANDISK, 0x100, add_quirk,
2401 MMC_QUIRK_INAND_CMD38),
2402 MMC_FIXUP("SEM16G", CID_MANFID_SANDISK, 0x100, add_quirk,
2403 MMC_QUIRK_INAND_CMD38),
2404 MMC_FIXUP("SEM32G", CID_MANFID_SANDISK, 0x100, add_quirk,
2405 MMC_QUIRK_INAND_CMD38),
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415 MMC_FIXUP("SDMB-32", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
2416 MMC_QUIRK_BLK_NO_CMD23),
2417 MMC_FIXUP("SDM032", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
2418 MMC_QUIRK_BLK_NO_CMD23),
2419 MMC_FIXUP("MMC08G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2420 MMC_QUIRK_BLK_NO_CMD23),
2421 MMC_FIXUP("MMC16G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2422 MMC_QUIRK_BLK_NO_CMD23),
2423 MMC_FIXUP("MMC32G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2424 MMC_QUIRK_BLK_NO_CMD23),
2425
2426
2427
2428
2429
2430 MMC_FIXUP(CID_NAME_ANY, CID_MANFID_MICRON, 0x200, add_quirk_mmc,
2431 MMC_QUIRK_LONG_READ_TIME),
2432
2433
2434
2435
2436
2437
2438 MMC_FIXUP("M8G2FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2439 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2440 MMC_FIXUP("MAG4FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2441 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2442 MMC_FIXUP("MBG8FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2443 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2444 MMC_FIXUP("MCGAFA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2445 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2446 MMC_FIXUP("VAL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2447 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2448 MMC_FIXUP("VYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2449 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2450 MMC_FIXUP("KYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2451 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2452 MMC_FIXUP("VZL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
2453 MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
2454
2455
2456
2457
2458
2459 MMC_FIXUP("V10008", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
2460 MMC_QUIRK_TRIM_BROKEN),
2461 MMC_FIXUP("V10016", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
2462 MMC_QUIRK_TRIM_BROKEN),
2463
2464 END_FIXUP
2465};
2466
2467static int mmc_blk_probe(struct mmc_card *card)
2468{
2469 struct mmc_blk_data *md, *part_md;
2470 char cap_str[10];
2471
2472
2473
2474
2475 if (!(card->csd.cmdclass & CCC_BLOCK_READ))
2476 return -ENODEV;
2477
2478 mmc_fixup_device(card, blk_fixups);
2479
2480 md = mmc_blk_alloc(card);
2481 if (IS_ERR(md))
2482 return PTR_ERR(md);
2483
2484 string_get_size((u64)get_capacity(md->disk), 512, STRING_UNITS_2,
2485 cap_str, sizeof(cap_str));
2486 pr_info("%s: %s %s %s %s\n",
2487 md->disk->disk_name, mmc_card_id(card), mmc_card_name(card),
2488 cap_str, md->read_only ? "(ro)" : "");
2489
2490 if (mmc_blk_alloc_parts(card, md))
2491 goto out;
2492
2493 dev_set_drvdata(&card->dev, md);
2494
2495 if (mmc_add_disk(md))
2496 goto out;
2497
2498 list_for_each_entry(part_md, &md->part, part) {
2499 if (mmc_add_disk(part_md))
2500 goto out;
2501 }
2502
2503 pm_runtime_set_autosuspend_delay(&card->dev, 3000);
2504 pm_runtime_use_autosuspend(&card->dev);
2505
2506
2507
2508
2509
2510 if (card->type != MMC_TYPE_SD_COMBO) {
2511 pm_runtime_set_active(&card->dev);
2512 pm_runtime_enable(&card->dev);
2513 }
2514
2515 return 0;
2516
2517 out:
2518 mmc_blk_remove_parts(card, md);
2519 mmc_blk_remove_req(md);
2520 return 0;
2521}
2522
2523static void mmc_blk_remove(struct mmc_card *card)
2524{
2525 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
2526
2527 mmc_blk_remove_parts(card, md);
2528 pm_runtime_get_sync(&card->dev);
2529 mmc_claim_host(card->host);
2530 mmc_blk_part_switch(card, md);
2531 mmc_release_host(card->host);
2532 if (card->type != MMC_TYPE_SD_COMBO)
2533 pm_runtime_disable(&card->dev);
2534 pm_runtime_put_noidle(&card->dev);
2535 mmc_blk_remove_req(md);
2536 dev_set_drvdata(&card->dev, NULL);
2537}
2538
2539static int _mmc_blk_suspend(struct mmc_card *card)
2540{
2541 struct mmc_blk_data *part_md;
2542 struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
2543
2544 if (md) {
2545 mmc_queue_suspend(&md->queue);
2546 list_for_each_entry(part_md, &md->part, part) {
2547 mmc_queue_suspend(&part_md->queue);
2548 }
2549 }
2550 return 0;
2551}
2552
2553static void mmc_blk_shutdown(struct mmc_card *card)
2554{
2555 _mmc_blk_suspend(card);
2556}
2557
2558#ifdef CONFIG_PM_SLEEP
2559static int mmc_blk_suspend(struct device *dev)
2560{
2561 struct mmc_card *card = mmc_dev_to_card(dev);
2562
2563 return _mmc_blk_suspend(card);
2564}
2565
2566static int mmc_blk_resume(struct device *dev)
2567{
2568 struct mmc_blk_data *part_md;
2569 struct mmc_blk_data *md = dev_get_drvdata(dev);
2570
2571 if (md) {
2572
2573
2574
2575
2576 md->part_curr = md->part_type;
2577 mmc_queue_resume(&md->queue);
2578 list_for_each_entry(part_md, &md->part, part) {
2579 mmc_queue_resume(&part_md->queue);
2580 }
2581 }
2582 return 0;
2583}
2584#endif
2585
2586static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops, mmc_blk_suspend, mmc_blk_resume);
2587
2588static struct mmc_driver mmc_driver = {
2589 .drv = {
2590 .name = "mmcblk",
2591 .pm = &mmc_blk_pm_ops,
2592 },
2593 .probe = mmc_blk_probe,
2594 .remove = mmc_blk_remove,
2595 .shutdown = mmc_blk_shutdown,
2596};
2597
2598static int __init mmc_blk_init(void)
2599{
2600 int res;
2601
2602 if (perdev_minors != CONFIG_MMC_BLOCK_MINORS)
2603 pr_info("mmcblk: using %d minors per device\n", perdev_minors);
2604
2605 max_devices = min(MAX_DEVICES, (1 << MINORBITS) / perdev_minors);
2606
2607 res = register_blkdev(MMC_BLOCK_MAJOR, "mmc");
2608 if (res)
2609 goto out;
2610
2611 res = mmc_register_driver(&mmc_driver);
2612 if (res)
2613 goto out2;
2614
2615 return 0;
2616 out2:
2617 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
2618 out:
2619 return res;
2620}
2621
2622static void __exit mmc_blk_exit(void)
2623{
2624 mmc_unregister_driver(&mmc_driver);
2625 unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
2626}
2627
2628module_init(mmc_blk_init);
2629module_exit(mmc_blk_exit);
2630
2631MODULE_LICENSE("GPL");
2632MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver");
2633
2634