block.c 68.2 KB
Newer Older
L
Linus Torvalds 已提交
1 2 3 4
/*
 * Block driver for media (i.e., flash cards)
 *
 * Copyright 2002 Hewlett-Packard Company
5
 * Copyright 2005-2008 Pierre Ossman
L
Linus Torvalds 已提交
6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
 *
 * Use consistent with the GNU GPL is permitted,
 * provided that this copyright notice is
 * preserved in its entirety in all copies and derived works.
 *
 * HEWLETT-PACKARD COMPANY MAKES NO WARRANTIES, EXPRESSED OR IMPLIED,
 * AS TO THE USEFULNESS OR CORRECTNESS OF THIS CODE OR ITS
 * FITNESS FOR ANY PARTICULAR PURPOSE.
 *
 * Many thanks to Alessandro Rubini and Jonathan Corbet!
 *
 * Author:  Andrew Christian
 *          28 May 2002
 */
#include <linux/moduleparam.h>
#include <linux/module.h>
#include <linux/init.h>

#include <linux/kernel.h>
#include <linux/fs.h>
26
#include <linux/slab.h>
L
Linus Torvalds 已提交
27 28 29 30
#include <linux/errno.h>
#include <linux/hdreg.h>
#include <linux/kdev_t.h>
#include <linux/blkdev.h>
31
#include <linux/mutex.h>
32
#include <linux/scatterlist.h>
33
#include <linux/string_helpers.h>
34 35 36
#include <linux/delay.h>
#include <linux/capability.h>
#include <linux/compat.h>
37
#include <linux/pm_runtime.h>
38
#include <linux/idr.h>
L
Linus Torvalds 已提交
39

40
#include <linux/mmc/ioctl.h>
L
Linus Torvalds 已提交
41
#include <linux/mmc/card.h>
P
Pierre Ossman 已提交
42
#include <linux/mmc/host.h>
P
Pierre Ossman 已提交
43 44
#include <linux/mmc/mmc.h>
#include <linux/mmc/sd.h>
L
Linus Torvalds 已提交
45 46 47

#include <asm/uaccess.h>

48
#include "queue.h"
L
Linus Torvalds 已提交
49

50
MODULE_ALIAS("mmc:block");
51 52 53 54 55
#ifdef MODULE_PARAM_PREFIX
#undef MODULE_PARAM_PREFIX
#endif
#define MODULE_PARAM_PREFIX "mmcblk."

56 57 58 59 60 61
#define INAND_CMD38_ARG_EXT_CSD  113
#define INAND_CMD38_ARG_ERASE    0x00
#define INAND_CMD38_ARG_TRIM     0x01
#define INAND_CMD38_ARG_SECERASE 0x80
#define INAND_CMD38_ARG_SECTRIM1 0x81
#define INAND_CMD38_ARG_SECTRIM2 0x88
62
#define MMC_BLK_TIMEOUT_MS  (10 * 60 * 1000)        /* 10 minute timeout */
63 64
#define MMC_SANITIZE_REQ_TIMEOUT 240000
#define MMC_EXTRACT_INDEX_FROM_ARG(x) ((x & 0x00FF0000) >> 16)
65

66
#define mmc_req_rel_wr(req)	((req->cmd_flags & REQ_FUA) && \
67 68 69 70
				  (rq_data_dir(req) == WRITE))
#define PACKED_CMD_VER	0x01
#define PACKED_CMD_WR	0x02

71
static DEFINE_MUTEX(block_mutex);
72

L
Linus Torvalds 已提交
73
/*
74 75
 * The defaults come from config options but can be overriden by module
 * or bootarg options.
L
Linus Torvalds 已提交
76
 */
77
static int perdev_minors = CONFIG_MMC_BLOCK_MINORS;
78

79 80
/*
 * We've only got one major, so number of mmcblk devices is
B
Ben Hutchings 已提交
81
 * limited to (1 << 20) / number of minors per device.  It is also
82
 * limited by the MAX_DEVICES below.
83 84 85
 */
static int max_devices;

B
Ben Hutchings 已提交
86 87
#define MAX_DEVICES 256

88 89
static DEFINE_IDA(mmc_blk_ida);
static DEFINE_SPINLOCK(mmc_blk_lock);
L
Linus Torvalds 已提交
90 91 92 93 94 95

/*
 * There is one mmc_blk_data per slot.
 */
struct mmc_blk_data {
	spinlock_t	lock;
96
	struct device	*parent;
L
Linus Torvalds 已提交
97 98
	struct gendisk	*disk;
	struct mmc_queue queue;
99
	struct list_head part;
L
Linus Torvalds 已提交
100

101 102 103
	unsigned int	flags;
#define MMC_BLK_CMD23	(1 << 0)	/* Can do SET_BLOCK_COUNT for multiblock */
#define MMC_BLK_REL_WR	(1 << 1)	/* MMC Reliable write support */
104
#define MMC_BLK_PACKED_CMD	(1 << 2)	/* MMC packed command support */
105

L
Linus Torvalds 已提交
106
	unsigned int	usage;
107
	unsigned int	read_only;
108
	unsigned int	part_type;
109 110 111 112 113
	unsigned int	reset_done;
#define MMC_BLK_READ		BIT(0)
#define MMC_BLK_WRITE		BIT(1)
#define MMC_BLK_DISCARD		BIT(2)
#define MMC_BLK_SECDISCARD	BIT(3)
114 115 116

	/*
	 * Only set in main mmc_blk_data associated
117
	 * with mmc_card with dev_set_drvdata, and keeps
118 119 120 121
	 * track of the current selected device partition.
	 */
	unsigned int	part_curr;
	struct device_attribute force_ro;
122 123
	struct device_attribute power_ro_lock;
	int	area_type;
L
Linus Torvalds 已提交
124 125
};

126
static DEFINE_MUTEX(open_lock);
L
Linus Torvalds 已提交
127

128 129 130 131 132 133
enum {
	MMC_PACKED_NR_IDX = -1,
	MMC_PACKED_NR_ZERO,
	MMC_PACKED_NR_SINGLE,
};

134 135 136
module_param(perdev_minors, int, 0444);
MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device");

137 138 139 140
static inline int mmc_blk_part_switch(struct mmc_card *card,
				      struct mmc_blk_data *md);
static int get_card_status(struct mmc_card *card, u32 *status, int retries);

141 142 143 144 145 146 147 148 149 150 151 152 153
static inline void mmc_blk_clear_packed(struct mmc_queue_req *mqrq)
{
	struct mmc_packed *packed = mqrq->packed;

	BUG_ON(!packed);

	mqrq->cmd_type = MMC_PACKED_NONE;
	packed->nr_entries = MMC_PACKED_NR_ZERO;
	packed->idx_failure = MMC_PACKED_NR_IDX;
	packed->retries = 0;
	packed->blocks = 0;
}

L
Linus Torvalds 已提交
154 155 156 157
static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk)
{
	struct mmc_blk_data *md;

158
	mutex_lock(&open_lock);
L
Linus Torvalds 已提交
159 160 161 162 163
	md = disk->private_data;
	if (md && md->usage == 0)
		md = NULL;
	if (md)
		md->usage++;
164
	mutex_unlock(&open_lock);
L
Linus Torvalds 已提交
165 166 167 168

	return md;
}

169 170
static inline int mmc_get_devidx(struct gendisk *disk)
{
171
	int devidx = disk->first_minor / perdev_minors;
172 173 174
	return devidx;
}

L
Linus Torvalds 已提交
175 176
static void mmc_blk_put(struct mmc_blk_data *md)
{
177
	mutex_lock(&open_lock);
L
Linus Torvalds 已提交
178 179
	md->usage--;
	if (md->usage == 0) {
180
		int devidx = mmc_get_devidx(md->disk);
A
Adrian Hunter 已提交
181 182
		blk_cleanup_queue(md->queue.queue);

183 184 185
		spin_lock(&mmc_blk_lock);
		ida_remove(&mmc_blk_ida, devidx);
		spin_unlock(&mmc_blk_lock);
186

L
Linus Torvalds 已提交
187 188 189
		put_disk(md->disk);
		kfree(md);
	}
190
	mutex_unlock(&open_lock);
L
Linus Torvalds 已提交
191 192
}

193 194 195 196 197 198 199 200 201 202 203 204 205 206 207
static ssize_t power_ro_lock_show(struct device *dev,
		struct device_attribute *attr, char *buf)
{
	int ret;
	struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
	struct mmc_card *card = md->queue.card;
	int locked = 0;

	if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PERM_WP_EN)
		locked = 2;
	else if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_EN)
		locked = 1;

	ret = snprintf(buf, PAGE_SIZE, "%d\n", locked);

208 209
	mmc_blk_put(md);

210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229
	return ret;
}

static ssize_t power_ro_lock_store(struct device *dev,
		struct device_attribute *attr, const char *buf, size_t count)
{
	int ret;
	struct mmc_blk_data *md, *part_md;
	struct mmc_card *card;
	unsigned long set;

	if (kstrtoul(buf, 0, &set))
		return -EINVAL;

	if (set != 1)
		return count;

	md = mmc_blk_get(dev_to_disk(dev));
	card = md->queue.card;

230
	mmc_get_card(card);
231 232 233 234 235 236 237 238 239 240

	ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BOOT_WP,
				card->ext_csd.boot_ro_lock |
				EXT_CSD_BOOT_WP_B_PWR_WP_EN,
				card->ext_csd.part_time);
	if (ret)
		pr_err("%s: Locking boot partition ro until next power on failed: %d\n", md->disk->disk_name, ret);
	else
		card->ext_csd.boot_ro_lock |= EXT_CSD_BOOT_WP_B_PWR_WP_EN;

241
	mmc_put_card(card);
242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258

	if (!ret) {
		pr_info("%s: Locking boot partition ro until next power on\n",
			md->disk->disk_name);
		set_disk_ro(md->disk, 1);

		list_for_each_entry(part_md, &md->part, part)
			if (part_md->area_type == MMC_BLK_DATA_AREA_BOOT) {
				pr_info("%s: Locking boot partition ro until next power on\n", part_md->disk->disk_name);
				set_disk_ro(part_md->disk, 1);
			}
	}

	mmc_blk_put(md);
	return count;
}

259 260 261 262 263 264
static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr,
			     char *buf)
{
	int ret;
	struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));

265
	ret = snprintf(buf, PAGE_SIZE, "%d\n",
266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290
		       get_disk_ro(dev_to_disk(dev)) ^
		       md->read_only);
	mmc_blk_put(md);
	return ret;
}

static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr,
			      const char *buf, size_t count)
{
	int ret;
	char *end;
	struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev));
	unsigned long set = simple_strtoul(buf, &end, 0);
	if (end == buf) {
		ret = -EINVAL;
		goto out;
	}

	set_disk_ro(dev_to_disk(dev), set || md->read_only);
	ret = count;
out:
	mmc_blk_put(md);
	return ret;
}

A
Al Viro 已提交
291
static int mmc_blk_open(struct block_device *bdev, fmode_t mode)
L
Linus Torvalds 已提交
292
{
A
Al Viro 已提交
293
	struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk);
L
Linus Torvalds 已提交
294 295
	int ret = -ENXIO;

296
	mutex_lock(&block_mutex);
L
Linus Torvalds 已提交
297 298
	if (md) {
		if (md->usage == 2)
A
Al Viro 已提交
299
			check_disk_change(bdev);
L
Linus Torvalds 已提交
300
		ret = 0;
P
Pierre Ossman 已提交
301

A
Al Viro 已提交
302
		if ((mode & FMODE_WRITE) && md->read_only) {
303
			mmc_blk_put(md);
P
Pierre Ossman 已提交
304
			ret = -EROFS;
305
		}
L
Linus Torvalds 已提交
306
	}
307
	mutex_unlock(&block_mutex);
L
Linus Torvalds 已提交
308 309 310 311

	return ret;
}

312
static void mmc_blk_release(struct gendisk *disk, fmode_t mode)
L
Linus Torvalds 已提交
313
{
A
Al Viro 已提交
314
	struct mmc_blk_data *md = disk->private_data;
L
Linus Torvalds 已提交
315

316
	mutex_lock(&block_mutex);
L
Linus Torvalds 已提交
317
	mmc_blk_put(md);
318
	mutex_unlock(&block_mutex);
L
Linus Torvalds 已提交
319 320 321
}

static int
322
mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo)
L
Linus Torvalds 已提交
323
{
324 325 326 327
	geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16);
	geo->heads = 4;
	geo->sectors = 16;
	return 0;
L
Linus Torvalds 已提交
328 329
}

330 331 332 333 334 335 336 337 338 339 340 341
struct mmc_blk_ioc_data {
	struct mmc_ioc_cmd ic;
	unsigned char *buf;
	u64 buf_bytes;
};

static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user(
	struct mmc_ioc_cmd __user *user)
{
	struct mmc_blk_ioc_data *idata;
	int err;

342
	idata = kmalloc(sizeof(*idata), GFP_KERNEL);
343 344
	if (!idata) {
		err = -ENOMEM;
345
		goto out;
346 347 348 349
	}

	if (copy_from_user(&idata->ic, user, sizeof(idata->ic))) {
		err = -EFAULT;
350
		goto idata_err;
351 352 353 354 355
	}

	idata->buf_bytes = (u64) idata->ic.blksz * idata->ic.blocks;
	if (idata->buf_bytes > MMC_IOC_MAX_BYTES) {
		err = -EOVERFLOW;
356
		goto idata_err;
357 358
	}

359 360
	if (!idata->buf_bytes) {
		idata->buf = NULL;
361
		return idata;
362
	}
363

364
	idata->buf = kmalloc(idata->buf_bytes, GFP_KERNEL);
365 366
	if (!idata->buf) {
		err = -ENOMEM;
367
		goto idata_err;
368 369 370 371 372 373 374 375 376 377 378 379
	}

	if (copy_from_user(idata->buf, (void __user *)(unsigned long)
					idata->ic.data_ptr, idata->buf_bytes)) {
		err = -EFAULT;
		goto copy_err;
	}

	return idata;

copy_err:
	kfree(idata->buf);
380
idata_err:
381
	kfree(idata);
382
out:
383 384 385
	return ERR_PTR(err);
}

386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403
static int mmc_blk_ioctl_copy_to_user(struct mmc_ioc_cmd __user *ic_ptr,
				      struct mmc_blk_ioc_data *idata)
{
	struct mmc_ioc_cmd *ic = &idata->ic;

	if (copy_to_user(&(ic_ptr->response), ic->response,
			 sizeof(ic->response)))
		return -EFAULT;

	if (!idata->ic.write_flag) {
		if (copy_to_user((void __user *)(unsigned long)ic->data_ptr,
				 idata->buf, idata->buf_bytes))
			return -EFAULT;
	}

	return 0;
}

404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435
static int ioctl_rpmb_card_status_poll(struct mmc_card *card, u32 *status,
				       u32 retries_max)
{
	int err;
	u32 retry_count = 0;

	if (!status || !retries_max)
		return -EINVAL;

	do {
		err = get_card_status(card, status, 5);
		if (err)
			break;

		if (!R1_STATUS(*status) &&
				(R1_CURRENT_STATE(*status) != R1_STATE_PRG))
			break; /* RPMB programming operation complete */

		/*
		 * Rechedule to give the MMC device a chance to continue
		 * processing the previous command without being polled too
		 * frequently.
		 */
		usleep_range(1000, 5000);
	} while (++retry_count < retries_max);

	if (retry_count == retries_max)
		err = -EPERM;

	return err;
}

436 437 438 439
static int ioctl_do_sanitize(struct mmc_card *card)
{
	int err;

440
	if (!mmc_can_sanitize(card)) {
441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463
			pr_warn("%s: %s - SANITIZE is not supported\n",
				mmc_hostname(card->host), __func__);
			err = -EOPNOTSUPP;
			goto out;
	}

	pr_debug("%s: %s - SANITIZE IN PROGRESS...\n",
		mmc_hostname(card->host), __func__);

	err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
					EXT_CSD_SANITIZE_START, 1,
					MMC_SANITIZE_REQ_TIMEOUT);

	if (err)
		pr_err("%s: %s - EXT_CSD_SANITIZE_START failed. err=%d\n",
		       mmc_hostname(card->host), __func__, err);

	pr_debug("%s: %s - SANITIZE COMPLETED\n", mmc_hostname(card->host),
					     __func__);
out:
	return err;
}

464 465
static int __mmc_blk_ioctl_cmd(struct mmc_card *card, struct mmc_blk_data *md,
			       struct mmc_blk_ioc_data *idata)
466 467 468
{
	struct mmc_command cmd = {0};
	struct mmc_data data = {0};
469
	struct mmc_request mrq = {NULL};
470 471
	struct scatterlist sg;
	int err;
472 473
	int is_rpmb = false;
	u32 status = 0;
474

475 476
	if (!card || !md || !idata)
		return -EINVAL;
477

478 479 480
	if (md->area_type & MMC_BLK_DATA_AREA_RPMB)
		is_rpmb = true;

481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522
	cmd.opcode = idata->ic.opcode;
	cmd.arg = idata->ic.arg;
	cmd.flags = idata->ic.flags;

	if (idata->buf_bytes) {
		data.sg = &sg;
		data.sg_len = 1;
		data.blksz = idata->ic.blksz;
		data.blocks = idata->ic.blocks;

		sg_init_one(data.sg, idata->buf, idata->buf_bytes);

		if (idata->ic.write_flag)
			data.flags = MMC_DATA_WRITE;
		else
			data.flags = MMC_DATA_READ;

		/* data.flags must already be set before doing this. */
		mmc_set_data_timeout(&data, card);

		/* Allow overriding the timeout_ns for empirical tuning. */
		if (idata->ic.data_timeout_ns)
			data.timeout_ns = idata->ic.data_timeout_ns;

		if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) {
			/*
			 * Pretend this is a data transfer and rely on the
			 * host driver to compute timeout.  When all host
			 * drivers support cmd.cmd_timeout for R1B, this
			 * can be changed to:
			 *
			 *     mrq.data = NULL;
			 *     cmd.cmd_timeout = idata->ic.cmd_timeout_ms;
			 */
			data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000;
		}

		mrq.data = &data;
	}

	mrq.cmd = &cmd;

523 524
	err = mmc_blk_part_switch(card, md);
	if (err)
525
		return err;
526

527 528 529
	if (idata->ic.is_acmd) {
		err = mmc_app_cmd(card->host, card);
		if (err)
530
			return err;
531 532
	}

533 534 535 536
	if (is_rpmb) {
		err = mmc_set_blockcount(card, data.blocks,
			idata->ic.write_flag & (1 << 31));
		if (err)
537
			return err;
538 539
	}

540 541
	if ((MMC_EXTRACT_INDEX_FROM_ARG(cmd.arg) == EXT_CSD_SANITIZE_START) &&
	    (cmd.opcode == MMC_SWITCH)) {
542 543 544 545 546 547
		err = ioctl_do_sanitize(card);

		if (err)
			pr_err("%s: ioctl_do_sanitize() failed. err = %d",
			       __func__, err);

548
		return err;
549 550
	}

551 552 553 554 555
	mmc_wait_for_req(card->host, &mrq);

	if (cmd.error) {
		dev_err(mmc_dev(card->host), "%s: cmd error %d\n",
						__func__, cmd.error);
556
		return cmd.error;
557 558 559 560
	}
	if (data.error) {
		dev_err(mmc_dev(card->host), "%s: data error %d\n",
						__func__, data.error);
561
		return data.error;
562 563 564 565 566 567 568 569 570
	}

	/*
	 * According to the SD specs, some commands require a delay after
	 * issuing the command.
	 */
	if (idata->ic.postsleep_min_us)
		usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us);

571
	memcpy(&(idata->ic.response), cmd.resp, sizeof(cmd.resp));
572

573 574 575 576 577 578 579 580 581 582 583 584
	if (is_rpmb) {
		/*
		 * Ensure RPMB command has completed by polling CMD13
		 * "Send Status".
		 */
		err = ioctl_rpmb_card_status_poll(card, &status, 5);
		if (err)
			dev_err(mmc_dev(card->host),
					"%s: Card Status=0x%08X, error %d\n",
					__func__, status, err);
	}

585 586 587 588 589 590 591 592 593
	return err;
}

static int mmc_blk_ioctl_cmd(struct block_device *bdev,
			     struct mmc_ioc_cmd __user *ic_ptr)
{
	struct mmc_blk_ioc_data *idata;
	struct mmc_blk_data *md;
	struct mmc_card *card;
594
	int err = 0, ioc_err = 0;
595

596 597 598 599 600 601 602 603
	/*
	 * The caller must have CAP_SYS_RAWIO, and must be calling this on the
	 * whole block device, not on a partition.  This prevents overspray
	 * between sibling partitions.
	 */
	if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
		return -EPERM;

604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621
	idata = mmc_blk_ioctl_copy_from_user(ic_ptr);
	if (IS_ERR(idata))
		return PTR_ERR(idata);

	md = mmc_blk_get(bdev->bd_disk);
	if (!md) {
		err = -EINVAL;
		goto cmd_err;
	}

	card = md->queue.card;
	if (IS_ERR(card)) {
		err = PTR_ERR(card);
		goto cmd_done;
	}

	mmc_get_card(card);

622
	ioc_err = __mmc_blk_ioctl_cmd(card, md, idata);
623

624 625 626 627
	/* Always switch back to main area after RPMB access */
	if (md->area_type & MMC_BLK_DATA_AREA_RPMB)
		mmc_blk_part_switch(card, dev_get_drvdata(&card->dev));

628
	mmc_put_card(card);
629

630
	err = mmc_blk_ioctl_copy_to_user(ic_ptr, idata);
631

632 633
cmd_done:
	mmc_blk_put(md);
634
cmd_err:
635 636
	kfree(idata->buf);
	kfree(idata);
637
	return ioc_err ? ioc_err : err;
638 639
}

640 641 642 643 644 645 646
static int mmc_blk_ioctl_multi_cmd(struct block_device *bdev,
				   struct mmc_ioc_multi_cmd __user *user)
{
	struct mmc_blk_ioc_data **idata = NULL;
	struct mmc_ioc_cmd __user *cmds = user->cmds;
	struct mmc_card *card;
	struct mmc_blk_data *md;
647
	int i, err = 0, ioc_err = 0;
648 649
	__u64 num_of_cmds;

650 651 652 653 654 655 656 657
	/*
	 * The caller must have CAP_SYS_RAWIO, and must be calling this on the
	 * whole block device, not on a partition.  This prevents overspray
	 * between sibling partitions.
	 */
	if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains))
		return -EPERM;

658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678
	if (copy_from_user(&num_of_cmds, &user->num_of_cmds,
			   sizeof(num_of_cmds)))
		return -EFAULT;

	if (num_of_cmds > MMC_IOC_MAX_CMDS)
		return -EINVAL;

	idata = kcalloc(num_of_cmds, sizeof(*idata), GFP_KERNEL);
	if (!idata)
		return -ENOMEM;

	for (i = 0; i < num_of_cmds; i++) {
		idata[i] = mmc_blk_ioctl_copy_from_user(&cmds[i]);
		if (IS_ERR(idata[i])) {
			err = PTR_ERR(idata[i]);
			num_of_cmds = i;
			goto cmd_err;
		}
	}

	md = mmc_blk_get(bdev->bd_disk);
679 680
	if (!md) {
		err = -EINVAL;
681
		goto cmd_err;
682
	}
683 684 685 686 687 688 689 690 691

	card = md->queue.card;
	if (IS_ERR(card)) {
		err = PTR_ERR(card);
		goto cmd_done;
	}

	mmc_get_card(card);

692 693
	for (i = 0; i < num_of_cmds && !ioc_err; i++)
		ioc_err = __mmc_blk_ioctl_cmd(card, md, idata[i]);
694

695 696 697 698
	/* Always switch back to main area after RPMB access */
	if (md->area_type & MMC_BLK_DATA_AREA_RPMB)
		mmc_blk_part_switch(card, dev_get_drvdata(&card->dev));

699 700 701
	mmc_put_card(card);

	/* copy to user if data and response */
702
	for (i = 0; i < num_of_cmds && !err; i++)
703 704 705 706 707 708 709 710 711 712
		err = mmc_blk_ioctl_copy_to_user(&cmds[i], idata[i]);

cmd_done:
	mmc_blk_put(md);
cmd_err:
	for (i = 0; i < num_of_cmds; i++) {
		kfree(idata[i]->buf);
		kfree(idata[i]);
	}
	kfree(idata);
713
	return ioc_err ? ioc_err : err;
714 715
}

716 717 718
static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode,
	unsigned int cmd, unsigned long arg)
{
719 720 721 722 723 724 725 726 727 728
	switch (cmd) {
	case MMC_IOC_CMD:
		return mmc_blk_ioctl_cmd(bdev,
				(struct mmc_ioc_cmd __user *)arg);
	case MMC_IOC_MULTI_CMD:
		return mmc_blk_ioctl_multi_cmd(bdev,
				(struct mmc_ioc_multi_cmd __user *)arg);
	default:
		return -EINVAL;
	}
729 730 731 732 733 734 735 736 737 738
}

#ifdef CONFIG_COMPAT
static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode,
	unsigned int cmd, unsigned long arg)
{
	return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg));
}
#endif

739
static const struct block_device_operations mmc_bdops = {
A
Al Viro 已提交
740 741
	.open			= mmc_blk_open,
	.release		= mmc_blk_release,
742
	.getgeo			= mmc_blk_getgeo,
L
Linus Torvalds 已提交
743
	.owner			= THIS_MODULE,
744 745 746 747
	.ioctl			= mmc_blk_ioctl,
#ifdef CONFIG_COMPAT
	.compat_ioctl		= mmc_blk_compat_ioctl,
#endif
L
Linus Torvalds 已提交
748 749
};

750 751 752 753
static inline int mmc_blk_part_switch(struct mmc_card *card,
				      struct mmc_blk_data *md)
{
	int ret;
754
	struct mmc_blk_data *main_md = dev_get_drvdata(&card->dev);
755

756 757 758 759
	if (main_md->part_curr == md->part_type)
		return 0;

	if (mmc_card_mmc(card)) {
760 761
		u8 part_config = card->ext_csd.part_config;

762 763 764
		if (md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
			mmc_retune_pause(card->host);

765 766
		part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
		part_config |= md->part_type;
767 768

		ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
769
				 EXT_CSD_PART_CONFIG, part_config,
770
				 card->ext_csd.part_time);
771 772 773
		if (ret) {
			if (md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
				mmc_retune_unpause(card->host);
774
			return ret;
775
		}
776 777

		card->ext_csd.part_config = part_config;
778 779 780

		if (main_md->part_curr == EXT_CSD_PART_CONFIG_ACC_RPMB)
			mmc_retune_unpause(card->host);
781
	}
782 783 784 785 786

	main_md->part_curr = md->part_type;
	return 0;
}

787 788 789
static u32 mmc_sd_num_wr_blocks(struct mmc_card *card)
{
	int err;
B
Ben Dooks 已提交
790 791
	u32 result;
	__be32 *blocks;
792

793
	struct mmc_request mrq = {NULL};
794
	struct mmc_command cmd = {0};
795
	struct mmc_data data = {0};
796 797 798 799 800

	struct scatterlist sg;

	cmd.opcode = MMC_APP_CMD;
	cmd.arg = card->rca << 16;
D
David Brownell 已提交
801
	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
802 803

	err = mmc_wait_for_cmd(card->host, &cmd, 0);
D
David Brownell 已提交
804 805 806
	if (err)
		return (u32)-1;
	if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD))
807 808 809 810 811 812
		return (u32)-1;

	memset(&cmd, 0, sizeof(struct mmc_command));

	cmd.opcode = SD_APP_SEND_NUM_WR_BLKS;
	cmd.arg = 0;
D
David Brownell 已提交
813
	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
814 815 816 817 818 819

	data.blksz = 4;
	data.blocks = 1;
	data.flags = MMC_DATA_READ;
	data.sg = &sg;
	data.sg_len = 1;
820
	mmc_set_data_timeout(&data, card);
821 822 823 824

	mrq.cmd = &cmd;
	mrq.data = &data;

B
Ben Dooks 已提交
825 826 827 828 829
	blocks = kmalloc(4, GFP_KERNEL);
	if (!blocks)
		return (u32)-1;

	sg_init_one(&sg, blocks, 4);
830 831 832

	mmc_wait_for_req(card->host, &mrq);

B
Ben Dooks 已提交
833 834 835
	result = ntohl(*blocks);
	kfree(blocks);

P
Pierre Ossman 已提交
836
	if (cmd.error || data.error)
B
Ben Dooks 已提交
837
		result = (u32)-1;
838

B
Ben Dooks 已提交
839
	return result;
840 841
}

842
static int get_card_status(struct mmc_card *card, u32 *status, int retries)
843
{
844
	struct mmc_command cmd = {0};
845 846 847 848 849 850
	int err;

	cmd.opcode = MMC_SEND_STATUS;
	if (!mmc_host_is_spi(card->host))
		cmd.arg = card->rca << 16;
	cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
851 852 853 854
	err = mmc_wait_for_cmd(card->host, &cmd, retries);
	if (err == 0)
		*status = cmd.resp[0];
	return err;
855 856
}

857
static int card_busy_detect(struct mmc_card *card, unsigned int timeout_ms,
858
		bool hw_busy_detect, struct request *req, int *gen_err)
859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877
{
	unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
	int err = 0;
	u32 status;

	do {
		err = get_card_status(card, &status, 5);
		if (err) {
			pr_err("%s: error %d requesting status\n",
			       req->rq_disk->disk_name, err);
			return err;
		}

		if (status & R1_ERROR) {
			pr_err("%s: %s: error sending status cmd, status %#x\n",
				req->rq_disk->disk_name, __func__, status);
			*gen_err = 1;
		}

878 879 880 881 882
		/* We may rely on the host hw to handle busy detection.*/
		if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) &&
			hw_busy_detect)
			break;

883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904
		/*
		 * Timeout if the device never becomes ready for data and never
		 * leaves the program state.
		 */
		if (time_after(jiffies, timeout)) {
			pr_err("%s: Card stuck in programming state! %s %s\n",
				mmc_hostname(card->host),
				req->rq_disk->disk_name, __func__);
			return -ETIMEDOUT;
		}

		/*
		 * Some cards mishandle the status bits,
		 * so make sure to check both the busy
		 * indication and the card state.
		 */
	} while (!(status & R1_READY_FOR_DATA) ||
		 (R1_CURRENT_STATE(status) == R1_STATE_PRG));

	return err;
}

905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949
static int send_stop(struct mmc_card *card, unsigned int timeout_ms,
		struct request *req, int *gen_err, u32 *stop_status)
{
	struct mmc_host *host = card->host;
	struct mmc_command cmd = {0};
	int err;
	bool use_r1b_resp = rq_data_dir(req) == WRITE;

	/*
	 * Normally we use R1B responses for WRITE, but in cases where the host
	 * has specified a max_busy_timeout we need to validate it. A failure
	 * means we need to prevent the host from doing hw busy detection, which
	 * is done by converting to a R1 response instead.
	 */
	if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout))
		use_r1b_resp = false;

	cmd.opcode = MMC_STOP_TRANSMISSION;
	if (use_r1b_resp) {
		cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
		cmd.busy_timeout = timeout_ms;
	} else {
		cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
	}

	err = mmc_wait_for_cmd(host, &cmd, 5);
	if (err)
		return err;

	*stop_status = cmd.resp[0];

	/* No need to check card status in case of READ. */
	if (rq_data_dir(req) == READ)
		return 0;

	if (!mmc_host_is_spi(host) &&
		(*stop_status & R1_ERROR)) {
		pr_err("%s: %s: general error sending stop command, resp %#x\n",
			req->rq_disk->disk_name, __func__, *stop_status);
		*gen_err = 1;
	}

	return card_busy_detect(card, timeout_ms, use_r1b_resp, req, gen_err);
}

950
#define ERR_NOMEDIUM	3
951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970
#define ERR_RETRY	2
#define ERR_ABORT	1
#define ERR_CONTINUE	0

static int mmc_blk_cmd_error(struct request *req, const char *name, int error,
	bool status_valid, u32 status)
{
	switch (error) {
	case -EILSEQ:
		/* response crc error, retry the r/w cmd */
		pr_err("%s: %s sending %s command, card status %#x\n",
			req->rq_disk->disk_name, "response CRC error",
			name, status);
		return ERR_RETRY;

	case -ETIMEDOUT:
		pr_err("%s: %s sending %s command, card status %#x\n",
			req->rq_disk->disk_name, "timed out", name, status);

		/* If the status cmd initially failed, retry the r/w cmd */
971 972 973
		if (!status_valid) {
			pr_err("%s: status not valid, retrying timeout\n",
				req->rq_disk->disk_name);
974
			return ERR_RETRY;
975
		}
976 977 978 979 980 981

		/*
		 * If it was a r/w cmd crc error, or illegal command
		 * (eg, issued in wrong state) then retry - we should
		 * have corrected the state problem above.
		 */
982 983 984
		if (status & (R1_COM_CRC_ERROR | R1_ILLEGAL_COMMAND)) {
			pr_err("%s: command error, retrying timeout\n",
				req->rq_disk->disk_name);
985
			return ERR_RETRY;
986
		}
987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017

		/* Otherwise abort the command */
		return ERR_ABORT;

	default:
		/* We don't understand the error code the driver gave us */
		pr_err("%s: unknown error %d sending read/write command, card status %#x\n",
		       req->rq_disk->disk_name, error, status);
		return ERR_ABORT;
	}
}

/*
 * Initial r/w and stop cmd error recovery.
 * We don't know whether the card received the r/w cmd or not, so try to
 * restore things back to a sane state.  Essentially, we do this as follows:
 * - Obtain card status.  If the first attempt to obtain card status fails,
 *   the status word will reflect the failed status cmd, not the failed
 *   r/w cmd.  If we fail to obtain card status, it suggests we can no
 *   longer communicate with the card.
 * - Check the card state.  If the card received the cmd but there was a
 *   transient problem with the response, it might still be in a data transfer
 *   mode.  Try to send it a stop command.  If this fails, we can't recover.
 * - If the r/w cmd failed due to a response CRC error, it was probably
 *   transient, so retry the cmd.
 * - If the r/w cmd timed out, but we didn't get the r/w cmd status, retry.
 * - If the r/w cmd timed out, and the r/w cmd failed due to CRC error or
 *   illegal cmd, retry.
 * Otherwise we don't understand what happened, so abort.
 */
static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req,
1018
	struct mmc_blk_request *brq, int *ecc_err, int *gen_err)
1019 1020 1021 1022 1023
{
	bool prev_cmd_status_valid = true;
	u32 status, stop_status = 0;
	int err, retry;

1024 1025 1026
	if (mmc_card_removed(card))
		return ERR_NOMEDIUM;

1027 1028 1029 1030 1031 1032 1033 1034 1035 1036
	/*
	 * Try to get card status which indicates both the card state
	 * and why there was no response.  If the first attempt fails,
	 * we can't be sure the returned status is for the r/w command.
	 */
	for (retry = 2; retry >= 0; retry--) {
		err = get_card_status(card, &status, 0);
		if (!err)
			break;

1037 1038 1039
		/* Re-tune if needed */
		mmc_retune_recheck(card->host);

1040 1041 1042 1043 1044 1045
		prev_cmd_status_valid = false;
		pr_err("%s: error %d sending status command, %sing\n",
		       req->rq_disk->disk_name, err, retry ? "retry" : "abort");
	}

	/* We couldn't get a response from the card.  Give up. */
1046 1047 1048 1049
	if (err) {
		/* Check if the card is removed */
		if (mmc_detect_card_removed(card->host))
			return ERR_NOMEDIUM;
1050
		return ERR_ABORT;
1051
	}
1052

1053 1054 1055 1056 1057 1058
	/* Flag ECC errors */
	if ((status & R1_CARD_ECC_FAILED) ||
	    (brq->stop.resp[0] & R1_CARD_ECC_FAILED) ||
	    (brq->cmd.resp[0] & R1_CARD_ECC_FAILED))
		*ecc_err = 1;

1059 1060 1061 1062 1063 1064 1065 1066 1067 1068
	/* Flag General errors */
	if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ)
		if ((status & R1_ERROR) ||
			(brq->stop.resp[0] & R1_ERROR)) {
			pr_err("%s: %s: general error sending stop or status command, stop cmd response %#x, card status %#x\n",
			       req->rq_disk->disk_name, __func__,
			       brq->stop.resp[0], status);
			*gen_err = 1;
		}

1069 1070 1071 1072 1073 1074
	/*
	 * Check the current card state.  If it is in some data transfer
	 * mode, tell it to stop (and hopefully transition back to TRAN.)
	 */
	if (R1_CURRENT_STATE(status) == R1_STATE_DATA ||
	    R1_CURRENT_STATE(status) == R1_STATE_RCV) {
1075 1076 1077 1078
		err = send_stop(card,
			DIV_ROUND_UP(brq->data.timeout_ns, 1000000),
			req, gen_err, &stop_status);
		if (err) {
1079 1080
			pr_err("%s: error %d sending stop command\n",
			       req->rq_disk->disk_name, err);
1081 1082 1083 1084
			/*
			 * If the stop cmd also timed out, the card is probably
			 * not present, so abort. Other errors are bad news too.
			 */
1085
			return ERR_ABORT;
1086 1087
		}

1088 1089
		if (stop_status & R1_CARD_ECC_FAILED)
			*ecc_err = 1;
1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101
	}

	/* Check for set block count errors */
	if (brq->sbc.error)
		return mmc_blk_cmd_error(req, "SET_BLOCK_COUNT", brq->sbc.error,
				prev_cmd_status_valid, status);

	/* Check for r/w command errors */
	if (brq->cmd.error)
		return mmc_blk_cmd_error(req, "r/w cmd", brq->cmd.error,
				prev_cmd_status_valid, status);

1102 1103 1104 1105
	/* Data errors */
	if (!brq->stop.error)
		return ERR_CONTINUE;

1106
	/* Now for stop errors.  These aren't fatal to the transfer. */
1107
	pr_info("%s: error %d sending stop command, original cmd response %#x, card status %#x\n",
1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121
	       req->rq_disk->disk_name, brq->stop.error,
	       brq->cmd.resp[0], status);

	/*
	 * Subsitute in our own stop status as this will give the error
	 * state which happened during the execution of the r/w command.
	 */
	if (stop_status) {
		brq->stop.resp[0] = stop_status;
		brq->stop.error = 0;
	}
	return ERR_CONTINUE;
}

1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133
static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host,
			 int type)
{
	int err;

	if (md->reset_done & type)
		return -EEXIST;

	md->reset_done |= type;
	err = mmc_hw_reset(host);
	/* Ensure we switch back to the correct partition */
	if (err != -EOPNOTSUPP) {
1134 1135
		struct mmc_blk_data *main_md =
			dev_get_drvdata(&host->card->dev);
1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155
		int part_err;

		main_md->part_curr = main_md->part_type;
		part_err = mmc_blk_part_switch(host->card, md);
		if (part_err) {
			/*
			 * We have failed to get back into the correct
			 * partition, so we need to abort the whole request.
			 */
			return -ENODEV;
		}
	}
	return err;
}

static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type)
{
	md->reset_done &= ~type;
}

1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167
int mmc_access_rpmb(struct mmc_queue *mq)
{
	struct mmc_blk_data *md = mq->data;
	/*
	 * If this is a RPMB partition access, return ture
	 */
	if (md && md->part_type == EXT_CSD_PART_CONFIG_ACC_RPMB)
		return true;

	return false;
}

A
Adrian Hunter 已提交
1168 1169 1170 1171 1172
static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req)
{
	struct mmc_blk_data *md = mq->data;
	struct mmc_card *card = md->queue.card;
	unsigned int from, nr, arg;
1173
	int err = 0, type = MMC_BLK_DISCARD;
A
Adrian Hunter 已提交
1174 1175 1176 1177 1178 1179 1180 1181 1182

	if (!mmc_can_erase(card)) {
		err = -EOPNOTSUPP;
		goto out;
	}

	from = blk_rq_pos(req);
	nr = blk_rq_sectors(req);

1183 1184 1185
	if (mmc_can_discard(card))
		arg = MMC_DISCARD_ARG;
	else if (mmc_can_trim(card))
A
Adrian Hunter 已提交
1186 1187 1188
		arg = MMC_TRIM_ARG;
	else
		arg = MMC_ERASE_ARG;
1189
retry:
1190 1191 1192 1193 1194 1195 1196 1197 1198 1199
	if (card->quirks & MMC_QUIRK_INAND_CMD38) {
		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
				 INAND_CMD38_ARG_EXT_CSD,
				 arg == MMC_TRIM_ARG ?
				 INAND_CMD38_ARG_TRIM :
				 INAND_CMD38_ARG_ERASE,
				 0);
		if (err)
			goto out;
	}
A
Adrian Hunter 已提交
1200 1201
	err = mmc_erase(card, from, nr, arg);
out:
1202 1203 1204 1205
	if (err == -EIO && !mmc_blk_reset(md, card->host, type))
		goto retry;
	if (!err)
		mmc_blk_reset_success(md, type);
1206
	blk_end_request(req, err, blk_rq_bytes(req));
A
Adrian Hunter 已提交
1207 1208 1209 1210

	return err ? 0 : 1;
}

1211 1212 1213 1214 1215
static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq,
				       struct request *req)
{
	struct mmc_blk_data *md = mq->data;
	struct mmc_card *card = md->queue.card;
1216
	unsigned int from, nr, arg;
1217
	int err = 0, type = MMC_BLK_SECDISCARD;
1218

1219
	if (!(mmc_can_secure_erase_trim(card))) {
1220 1221 1222 1223
		err = -EOPNOTSUPP;
		goto out;
	}

1224 1225 1226
	from = blk_rq_pos(req);
	nr = blk_rq_sectors(req);

1227 1228 1229 1230
	if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr))
		arg = MMC_SECURE_TRIM1_ARG;
	else
		arg = MMC_SECURE_ERASE_ARG;
1231

1232
retry:
1233 1234 1235 1236 1237 1238 1239 1240
	if (card->quirks & MMC_QUIRK_INAND_CMD38) {
		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
				 INAND_CMD38_ARG_EXT_CSD,
				 arg == MMC_SECURE_TRIM1_ARG ?
				 INAND_CMD38_ARG_SECTRIM1 :
				 INAND_CMD38_ARG_SECERASE,
				 0);
		if (err)
1241
			goto out_retry;
1242
	}
1243

1244
	err = mmc_erase(card, from, nr, arg);
1245 1246 1247 1248 1249 1250
	if (err == -EIO)
		goto out_retry;
	if (err)
		goto out;

	if (arg == MMC_SECURE_TRIM1_ARG) {
1251 1252 1253 1254 1255 1256
		if (card->quirks & MMC_QUIRK_INAND_CMD38) {
			err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
					 INAND_CMD38_ARG_EXT_CSD,
					 INAND_CMD38_ARG_SECTRIM2,
					 0);
			if (err)
1257
				goto out_retry;
1258
		}
1259

1260
		err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG);
1261 1262 1263 1264
		if (err == -EIO)
			goto out_retry;
		if (err)
			goto out;
1265
	}
1266 1267 1268

out_retry:
	if (err && !mmc_blk_reset(md, card->host, type))
1269 1270 1271
		goto retry;
	if (!err)
		mmc_blk_reset_success(md, type);
1272
out:
1273
	blk_end_request(req, err, blk_rq_bytes(req));
1274 1275 1276 1277

	return err ? 0 : 1;
}

A
Andrei Warkentin 已提交
1278 1279 1280
static int mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req)
{
	struct mmc_blk_data *md = mq->data;
1281 1282 1283 1284 1285 1286
	struct mmc_card *card = md->queue.card;
	int ret = 0;

	ret = mmc_flush_cache(card);
	if (ret)
		ret = -EIO;
A
Andrei Warkentin 已提交
1287

1288
	blk_end_request_all(req, ret);
A
Andrei Warkentin 已提交
1289

1290
	return ret ? 0 : 1;
A
Andrei Warkentin 已提交
1291 1292 1293 1294 1295 1296 1297 1298 1299
}

/*
 * Reformat current write as a reliable write, supporting
 * both legacy and the enhanced reliable write MMC cards.
 * In each transfer we'll handle only as much as a single
 * reliable write can handle, thus finish the request in
 * partial completions.
 */
1300 1301 1302
static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq,
				    struct mmc_card *card,
				    struct request *req)
A
Andrei Warkentin 已提交
1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315
{
	if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) {
		/* Legacy mode imposes restrictions on transfers. */
		if (!IS_ALIGNED(brq->cmd.arg, card->ext_csd.rel_sectors))
			brq->data.blocks = 1;

		if (brq->data.blocks > card->ext_csd.rel_sectors)
			brq->data.blocks = card->ext_csd.rel_sectors;
		else if (brq->data.blocks < card->ext_csd.rel_sectors)
			brq->data.blocks = 1;
	}
}

1316 1317 1318 1319 1320 1321 1322 1323
#define CMD_ERRORS							\
	(R1_OUT_OF_RANGE |	/* Command argument out of range */	\
	 R1_ADDRESS_ERROR |	/* Misaligned address */		\
	 R1_BLOCK_LEN_ERROR |	/* Transferred block length incorrect */\
	 R1_WP_VIOLATION |	/* Tried to write to protected block */	\
	 R1_CC_ERROR |		/* Card controller error */		\
	 R1_ERROR)		/* General/unknown error */

1324 1325
static int mmc_blk_err_check(struct mmc_card *card,
			     struct mmc_async_req *areq)
1326
{
1327 1328 1329 1330
	struct mmc_queue_req *mq_mrq = container_of(areq, struct mmc_queue_req,
						    mmc_active);
	struct mmc_blk_request *brq = &mq_mrq->brq;
	struct request *req = mq_mrq->req;
1331
	int need_retune = card->host->need_retune;
1332
	int ecc_err = 0, gen_err = 0;
1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343

	/*
	 * sbc.error indicates a problem with the set block count
	 * command.  No data will have been transferred.
	 *
	 * cmd.error indicates a problem with the r/w command.  No
	 * data will have been transferred.
	 *
	 * stop.error indicates a problem with the stop command.  Data
	 * may have been transferred, or may still be transferring.
	 */
1344 1345
	if (brq->sbc.error || brq->cmd.error || brq->stop.error ||
	    brq->data.error) {
1346
		switch (mmc_blk_cmd_recovery(card, req, brq, &ecc_err, &gen_err)) {
1347 1348 1349 1350
		case ERR_RETRY:
			return MMC_BLK_RETRY;
		case ERR_ABORT:
			return MMC_BLK_ABORT;
1351 1352
		case ERR_NOMEDIUM:
			return MMC_BLK_NOMEDIUM;
1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374
		case ERR_CONTINUE:
			break;
		}
	}

	/*
	 * Check for errors relating to the execution of the
	 * initial command - such as address errors.  No data
	 * has been transferred.
	 */
	if (brq->cmd.resp[0] & CMD_ERRORS) {
		pr_err("%s: r/w command failed, status = %#x\n",
		       req->rq_disk->disk_name, brq->cmd.resp[0]);
		return MMC_BLK_ABORT;
	}

	/*
	 * Everything else is either success, or a data error of some
	 * kind.  If it was a write, we may have transitioned to
	 * program mode, which we have to wait for it to complete.
	 */
	if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) {
1375
		int err;
1376

1377 1378 1379 1380 1381 1382 1383 1384
		/* Check stop command response */
		if (brq->stop.resp[0] & R1_ERROR) {
			pr_err("%s: %s: general error sending stop command, stop cmd response %#x\n",
			       req->rq_disk->disk_name, __func__,
			       brq->stop.resp[0]);
			gen_err = 1;
		}

1385 1386
		err = card_busy_detect(card, MMC_BLK_TIMEOUT_MS, false, req,
					&gen_err);
1387 1388
		if (err)
			return MMC_BLK_CMD_ERR;
1389 1390
	}

1391 1392 1393 1394 1395 1396 1397
	/* if general error occurs, retry the write operation. */
	if (gen_err) {
		pr_warn("%s: retrying write for general error\n",
				req->rq_disk->disk_name);
		return MMC_BLK_RETRY;
	}

1398
	if (brq->data.error) {
1399
		if (need_retune && !brq->retune_retry_done) {
1400 1401
			pr_debug("%s: retrying because a re-tune was needed\n",
				 req->rq_disk->disk_name);
1402 1403 1404
			brq->retune_retry_done = 1;
			return MMC_BLK_RETRY;
		}
1405 1406 1407 1408 1409 1410 1411
		pr_err("%s: error %d transferring data, sector %u, nr %u, cmd response %#x, card status %#x\n",
		       req->rq_disk->disk_name, brq->data.error,
		       (unsigned)blk_rq_pos(req),
		       (unsigned)blk_rq_sectors(req),
		       brq->cmd.resp[0], brq->stop.resp[0]);

		if (rq_data_dir(req) == READ) {
1412 1413
			if (ecc_err)
				return MMC_BLK_ECC_ERR;
1414 1415 1416 1417 1418 1419
			return MMC_BLK_DATA_ERR;
		} else {
			return MMC_BLK_CMD_ERR;
		}
	}

1420 1421
	if (!brq->data.bytes_xfered)
		return MMC_BLK_RETRY;
1422

1423 1424 1425 1426 1427 1428 1429
	if (mmc_packed_cmd(mq_mrq->cmd_type)) {
		if (unlikely(brq->data.blocks << 9 != brq->data.bytes_xfered))
			return MMC_BLK_PARTIAL;
		else
			return MMC_BLK_SUCCESS;
	}

1430 1431 1432 1433
	if (blk_rq_bytes(req) != brq->data.bytes_xfered)
		return MMC_BLK_PARTIAL;

	return MMC_BLK_SUCCESS;
1434 1435
}

1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457
static int mmc_blk_packed_err_check(struct mmc_card *card,
				    struct mmc_async_req *areq)
{
	struct mmc_queue_req *mq_rq = container_of(areq, struct mmc_queue_req,
			mmc_active);
	struct request *req = mq_rq->req;
	struct mmc_packed *packed = mq_rq->packed;
	int err, check, status;
	u8 *ext_csd;

	BUG_ON(!packed);

	packed->retries--;
	check = mmc_blk_err_check(card, areq);
	err = get_card_status(card, &status, 0);
	if (err) {
		pr_err("%s: error %d sending status command\n",
		       req->rq_disk->disk_name, err);
		return MMC_BLK_ABORT;
	}

	if (status & R1_EXCEPTION_EVENT) {
1458
		err = mmc_get_ext_csd(card, &ext_csd);
1459 1460 1461
		if (err) {
			pr_err("%s: error %d sending ext_csd\n",
			       req->rq_disk->disk_name, err);
1462
			return MMC_BLK_ABORT;
1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485
		}

		if ((ext_csd[EXT_CSD_EXP_EVENTS_STATUS] &
		     EXT_CSD_PACKED_FAILURE) &&
		    (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
		     EXT_CSD_PACKED_GENERIC_ERROR)) {
			if (ext_csd[EXT_CSD_PACKED_CMD_STATUS] &
			    EXT_CSD_PACKED_INDEXED_ERROR) {
				packed->idx_failure =
				  ext_csd[EXT_CSD_PACKED_FAILURE_INDEX] - 1;
				check = MMC_BLK_PARTIAL;
			}
			pr_err("%s: packed cmd failed, nr %u, sectors %u, "
			       "failure index: %d\n",
			       req->rq_disk->disk_name, packed->nr_entries,
			       packed->blocks, packed->idx_failure);
		}
		kfree(ext_csd);
	}

	return check;
}

1486 1487 1488 1489
static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq,
			       struct mmc_card *card,
			       int disable_multi,
			       struct mmc_queue *mq)
L
Linus Torvalds 已提交
1490
{
1491 1492 1493
	u32 readcmd, writecmd;
	struct mmc_blk_request *brq = &mqrq->brq;
	struct request *req = mqrq->req;
L
Linus Torvalds 已提交
1494
	struct mmc_blk_data *md = mq->data;
S
Saugata Das 已提交
1495
	bool do_data_tag;
L
Linus Torvalds 已提交
1496

A
Andrei Warkentin 已提交
1497 1498
	/*
	 * Reliable writes are used to implement Forced Unit Access and
1499
	 * are supported only on MMCs.
A
Andrei Warkentin 已提交
1500
	 */
1501
	bool do_rel_wr = (req->cmd_flags & REQ_FUA) &&
A
Andrei Warkentin 已提交
1502
		(rq_data_dir(req) == WRITE) &&
1503
		(md->flags & MMC_BLK_REL_WR);
A
Andrei Warkentin 已提交
1504

1505 1506 1507
	memset(brq, 0, sizeof(struct mmc_blk_request));
	brq->mrq.cmd = &brq->cmd;
	brq->mrq.data = &brq->data;
L
Linus Torvalds 已提交
1508

1509 1510 1511 1512 1513 1514 1515 1516
	brq->cmd.arg = blk_rq_pos(req);
	if (!mmc_card_blockaddr(card))
		brq->cmd.arg <<= 9;
	brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
	brq->data.blksz = 512;
	brq->stop.opcode = MMC_STOP_TRANSMISSION;
	brq->stop.arg = 0;
	brq->data.blocks = blk_rq_sectors(req);
1517

1518 1519 1520 1521 1522 1523 1524
	/*
	 * The block layer doesn't support all sector count
	 * restrictions, so we need to be prepared for too big
	 * requests.
	 */
	if (brq->data.blocks > card->host->max_blk_count)
		brq->data.blocks = card->host->max_blk_count;
L
Linus Torvalds 已提交
1525

1526 1527 1528 1529 1530 1531 1532 1533 1534
	if (brq->data.blocks > 1) {
		/*
		 * After a read error, we redo the request one sector
		 * at a time in order to accurately determine which
		 * sectors can be read successfully.
		 */
		if (disable_multi)
			brq->data.blocks = 1;

1535 1536 1537 1538 1539 1540 1541 1542 1543
		/*
		 * Some controllers have HW issues while operating
		 * in multiple I/O mode
		 */
		if (card->host->ops->multi_io_quirk)
			brq->data.blocks = card->host->ops->multi_io_quirk(card,
						(rq_data_dir(req) == READ) ?
						MMC_DATA_READ : MMC_DATA_WRITE,
						brq->data.blocks);
1544
	}
1545

1546 1547 1548
	if (brq->data.blocks > 1 || do_rel_wr) {
		/* SPI multiblock writes terminate using a special
		 * token, not a STOP_TRANSMISSION request.
1549
		 */
1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561
		if (!mmc_host_is_spi(card->host) ||
		    rq_data_dir(req) == READ)
			brq->mrq.stop = &brq->stop;
		readcmd = MMC_READ_MULTIPLE_BLOCK;
		writecmd = MMC_WRITE_MULTIPLE_BLOCK;
	} else {
		brq->mrq.stop = NULL;
		readcmd = MMC_READ_SINGLE_BLOCK;
		writecmd = MMC_WRITE_BLOCK;
	}
	if (rq_data_dir(req) == READ) {
		brq->cmd.opcode = readcmd;
1562
		brq->data.flags = MMC_DATA_READ;
1563 1564 1565
		if (brq->mrq.stop)
			brq->stop.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 |
					MMC_CMD_AC;
1566 1567
	} else {
		brq->cmd.opcode = writecmd;
1568
		brq->data.flags = MMC_DATA_WRITE;
1569 1570 1571
		if (brq->mrq.stop)
			brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B |
					MMC_CMD_AC;
1572
	}
1573

1574 1575
	if (do_rel_wr)
		mmc_apply_rel_rw(brq, card, req);
A
Andrei Warkentin 已提交
1576

S
Saugata Das 已提交
1577 1578 1579 1580 1581 1582 1583 1584 1585 1586
	/*
	 * Data tag is used only during writing meta data to speed
	 * up write and any subsequent read of this meta data
	 */
	do_data_tag = (card->ext_csd.data_tag_unit_size) &&
		(req->cmd_flags & REQ_META) &&
		(rq_data_dir(req) == WRITE) &&
		((brq->data.blocks * brq->data.blksz) >=
		 card->ext_csd.data_tag_unit_size);

1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604
	/*
	 * Pre-defined multi-block transfers are preferable to
	 * open ended-ones (and necessary for reliable writes).
	 * However, it is not sufficient to just send CMD23,
	 * and avoid the final CMD12, as on an error condition
	 * CMD12 (stop) needs to be sent anyway. This, coupled
	 * with Auto-CMD23 enhancements provided by some
	 * hosts, means that the complexity of dealing
	 * with this is best left to the host. If CMD23 is
	 * supported by card and host, we'll fill sbc in and let
	 * the host deal with handling it correctly. This means
	 * that for hosts that don't expose MMC_CAP_CMD23, no
	 * change of behavior will be observed.
	 *
	 * N.B: Some MMC cards experience perf degradation.
	 * We'll avoid using CMD23-bounded multiblock writes for
	 * these, while retaining features like reliable writes.
	 */
S
Saugata Das 已提交
1605 1606 1607
	if ((md->flags & MMC_BLK_CMD23) && mmc_op_multi(brq->cmd.opcode) &&
	    (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23) ||
	     do_data_tag)) {
1608 1609
		brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
		brq->sbc.arg = brq->data.blocks |
S
Saugata Das 已提交
1610 1611
			(do_rel_wr ? (1 << 31) : 0) |
			(do_data_tag ? (1 << 29) : 0);
1612 1613 1614
		brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;
		brq->mrq.sbc = &brq->sbc;
	}
1615

1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634
	mmc_set_data_timeout(&brq->data, card);

	brq->data.sg = mqrq->sg;
	brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);

	/*
	 * Adjust the sg list so it is the same size as the
	 * request.
	 */
	if (brq->data.blocks != blk_rq_sectors(req)) {
		int i, data_size = brq->data.blocks << 9;
		struct scatterlist *sg;

		for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) {
			data_size -= sg->length;
			if (data_size <= 0) {
				sg->length += data_size;
				i++;
				break;
1635 1636
			}
		}
1637 1638 1639
		brq->data.sg_len = i;
	}

1640 1641 1642
	mqrq->mmc_active.mrq = &brq->mrq;
	mqrq->mmc_active.err_check = mmc_blk_err_check;

1643 1644
	mmc_queue_bounce_pre(mqrq);
}
1645

1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727
static inline u8 mmc_calc_packed_hdr_segs(struct request_queue *q,
					  struct mmc_card *card)
{
	unsigned int hdr_sz = mmc_large_sector(card) ? 4096 : 512;
	unsigned int max_seg_sz = queue_max_segment_size(q);
	unsigned int len, nr_segs = 0;

	do {
		len = min(hdr_sz, max_seg_sz);
		hdr_sz -= len;
		nr_segs++;
	} while (hdr_sz);

	return nr_segs;
}

static u8 mmc_blk_prep_packed_list(struct mmc_queue *mq, struct request *req)
{
	struct request_queue *q = mq->queue;
	struct mmc_card *card = mq->card;
	struct request *cur = req, *next = NULL;
	struct mmc_blk_data *md = mq->data;
	struct mmc_queue_req *mqrq = mq->mqrq_cur;
	bool en_rel_wr = card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN;
	unsigned int req_sectors = 0, phys_segments = 0;
	unsigned int max_blk_count, max_phys_segs;
	bool put_back = true;
	u8 max_packed_rw = 0;
	u8 reqs = 0;

	if (!(md->flags & MMC_BLK_PACKED_CMD))
		goto no_packed;

	if ((rq_data_dir(cur) == WRITE) &&
	    mmc_host_packed_wr(card->host))
		max_packed_rw = card->ext_csd.max_packed_writes;

	if (max_packed_rw == 0)
		goto no_packed;

	if (mmc_req_rel_wr(cur) &&
	    (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
		goto no_packed;

	if (mmc_large_sector(card) &&
	    !IS_ALIGNED(blk_rq_sectors(cur), 8))
		goto no_packed;

	mmc_blk_clear_packed(mqrq);

	max_blk_count = min(card->host->max_blk_count,
			    card->host->max_req_size >> 9);
	if (unlikely(max_blk_count > 0xffff))
		max_blk_count = 0xffff;

	max_phys_segs = queue_max_segments(q);
	req_sectors += blk_rq_sectors(cur);
	phys_segments += cur->nr_phys_segments;

	if (rq_data_dir(cur) == WRITE) {
		req_sectors += mmc_large_sector(card) ? 8 : 1;
		phys_segments += mmc_calc_packed_hdr_segs(q, card);
	}

	do {
		if (reqs >= max_packed_rw - 1) {
			put_back = false;
			break;
		}

		spin_lock_irq(q->queue_lock);
		next = blk_fetch_request(q);
		spin_unlock_irq(q->queue_lock);
		if (!next) {
			put_back = false;
			break;
		}

		if (mmc_large_sector(card) &&
		    !IS_ALIGNED(blk_rq_sectors(next), 8))
			break;

1728
		if (req_op(next) == REQ_OP_DISCARD ||
A
Adrian Hunter 已提交
1729
		    req_op(next) == REQ_OP_SECURE_ERASE ||
1730
		    req_op(next) == REQ_OP_FLUSH)
1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792
			break;

		if (rq_data_dir(cur) != rq_data_dir(next))
			break;

		if (mmc_req_rel_wr(next) &&
		    (md->flags & MMC_BLK_REL_WR) && !en_rel_wr)
			break;

		req_sectors += blk_rq_sectors(next);
		if (req_sectors > max_blk_count)
			break;

		phys_segments +=  next->nr_phys_segments;
		if (phys_segments > max_phys_segs)
			break;

		list_add_tail(&next->queuelist, &mqrq->packed->list);
		cur = next;
		reqs++;
	} while (1);

	if (put_back) {
		spin_lock_irq(q->queue_lock);
		blk_requeue_request(q, next);
		spin_unlock_irq(q->queue_lock);
	}

	if (reqs > 0) {
		list_add(&req->queuelist, &mqrq->packed->list);
		mqrq->packed->nr_entries = ++reqs;
		mqrq->packed->retries = reqs;
		return reqs;
	}

no_packed:
	mqrq->cmd_type = MMC_PACKED_NONE;
	return 0;
}

static void mmc_blk_packed_hdr_wrq_prep(struct mmc_queue_req *mqrq,
					struct mmc_card *card,
					struct mmc_queue *mq)
{
	struct mmc_blk_request *brq = &mqrq->brq;
	struct request *req = mqrq->req;
	struct request *prq;
	struct mmc_blk_data *md = mq->data;
	struct mmc_packed *packed = mqrq->packed;
	bool do_rel_wr, do_data_tag;
	u32 *packed_cmd_hdr;
	u8 hdr_blocks;
	u8 i = 1;

	BUG_ON(!packed);

	mqrq->cmd_type = MMC_PACKED_WRITE;
	packed->blocks = 0;
	packed->idx_failure = MMC_PACKED_NR_IDX;

	packed_cmd_hdr = packed->cmd_hdr;
	memset(packed_cmd_hdr, 0, sizeof(packed->cmd_hdr));
1793 1794
	packed_cmd_hdr[0] = cpu_to_le32((packed->nr_entries << 16) |
		(PACKED_CMD_WR << 8) | PACKED_CMD_VER);
1795 1796 1797 1798 1799 1800 1801 1802 1803 1804
	hdr_blocks = mmc_large_sector(card) ? 8 : 1;

	/*
	 * Argument for each entry of packed group
	 */
	list_for_each_entry(prq, &packed->list, queuelist) {
		do_rel_wr = mmc_req_rel_wr(prq) && (md->flags & MMC_BLK_REL_WR);
		do_data_tag = (card->ext_csd.data_tag_unit_size) &&
			(prq->cmd_flags & REQ_META) &&
			(rq_data_dir(prq) == WRITE) &&
1805
			blk_rq_bytes(prq) >= card->ext_csd.data_tag_unit_size;
1806
		/* Argument of CMD23 */
1807
		packed_cmd_hdr[(i * 2)] = cpu_to_le32(
1808 1809
			(do_rel_wr ? MMC_CMD23_ARG_REL_WR : 0) |
			(do_data_tag ? MMC_CMD23_ARG_TAG_REQ : 0) |
1810
			blk_rq_sectors(prq));
1811
		/* Argument of CMD18 or CMD25 */
1812
		packed_cmd_hdr[((i * 2)) + 1] = cpu_to_le32(
1813
			mmc_card_blockaddr(card) ?
1814
			blk_rq_pos(prq) : blk_rq_pos(prq) << 9);
1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836
		packed->blocks += blk_rq_sectors(prq);
		i++;
	}

	memset(brq, 0, sizeof(struct mmc_blk_request));
	brq->mrq.cmd = &brq->cmd;
	brq->mrq.data = &brq->data;
	brq->mrq.sbc = &brq->sbc;
	brq->mrq.stop = &brq->stop;

	brq->sbc.opcode = MMC_SET_BLOCK_COUNT;
	brq->sbc.arg = MMC_CMD23_ARG_PACKED | (packed->blocks + hdr_blocks);
	brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC;

	brq->cmd.opcode = MMC_WRITE_MULTIPLE_BLOCK;
	brq->cmd.arg = blk_rq_pos(req);
	if (!mmc_card_blockaddr(card))
		brq->cmd.arg <<= 9;
	brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;

	brq->data.blksz = 512;
	brq->data.blocks = packed->blocks + hdr_blocks;
1837
	brq->data.flags = MMC_DATA_WRITE;
1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853

	brq->stop.opcode = MMC_STOP_TRANSMISSION;
	brq->stop.arg = 0;
	brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;

	mmc_set_data_timeout(&brq->data, card);

	brq->data.sg = mqrq->sg;
	brq->data.sg_len = mmc_queue_map_sg(mq, mqrq);

	mqrq->mmc_active.mrq = &brq->mrq;
	mqrq->mmc_active.err_check = mmc_blk_packed_err_check;

	mmc_queue_bounce_pre(mqrq);
}

1854 1855 1856 1857
static int mmc_blk_cmd_err(struct mmc_blk_data *md, struct mmc_card *card,
			   struct mmc_blk_request *brq, struct request *req,
			   int ret)
{
1858 1859 1860
	struct mmc_queue_req *mq_rq;
	mq_rq = container_of(brq, struct mmc_queue_req, brq);

1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873
	/*
	 * If this is an SD card and we're writing, we can first
	 * mark the known good sectors as ok.
	 *
	 * If the card is not SD, we can still ok written sectors
	 * as reported by the controller (which might be less than
	 * the real number of written sectors, but never more).
	 */
	if (mmc_card_sd(card)) {
		u32 blocks;

		blocks = mmc_sd_num_wr_blocks(card);
		if (blocks != (u32)-1) {
1874
			ret = blk_end_request(req, 0, blocks << 9);
1875 1876
		}
	} else {
1877 1878
		if (!mmc_packed_cmd(mq_rq->cmd_type))
			ret = blk_end_request(req, 0, brq->data.bytes_xfered);
1879 1880 1881 1882
	}
	return ret;
}

1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954
static int mmc_blk_end_packed_req(struct mmc_queue_req *mq_rq)
{
	struct request *prq;
	struct mmc_packed *packed = mq_rq->packed;
	int idx = packed->idx_failure, i = 0;
	int ret = 0;

	BUG_ON(!packed);

	while (!list_empty(&packed->list)) {
		prq = list_entry_rq(packed->list.next);
		if (idx == i) {
			/* retry from error index */
			packed->nr_entries -= idx;
			mq_rq->req = prq;
			ret = 1;

			if (packed->nr_entries == MMC_PACKED_NR_SINGLE) {
				list_del_init(&prq->queuelist);
				mmc_blk_clear_packed(mq_rq);
			}
			return ret;
		}
		list_del_init(&prq->queuelist);
		blk_end_request(prq, 0, blk_rq_bytes(prq));
		i++;
	}

	mmc_blk_clear_packed(mq_rq);
	return ret;
}

static void mmc_blk_abort_packed_req(struct mmc_queue_req *mq_rq)
{
	struct request *prq;
	struct mmc_packed *packed = mq_rq->packed;

	BUG_ON(!packed);

	while (!list_empty(&packed->list)) {
		prq = list_entry_rq(packed->list.next);
		list_del_init(&prq->queuelist);
		blk_end_request(prq, -EIO, blk_rq_bytes(prq));
	}

	mmc_blk_clear_packed(mq_rq);
}

static void mmc_blk_revert_packed_req(struct mmc_queue *mq,
				      struct mmc_queue_req *mq_rq)
{
	struct request *prq;
	struct request_queue *q = mq->queue;
	struct mmc_packed *packed = mq_rq->packed;

	BUG_ON(!packed);

	while (!list_empty(&packed->list)) {
		prq = list_entry_rq(packed->list.prev);
		if (prq->queuelist.prev != &packed->list) {
			list_del_init(&prq->queuelist);
			spin_lock_irq(q->queue_lock);
			blk_requeue_request(mq->queue, prq);
			spin_unlock_irq(q->queue_lock);
		} else {
			list_del_init(&prq->queuelist);
		}
	}

	mmc_blk_clear_packed(mq_rq);
}

1955
static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc)
1956 1957 1958 1959
{
	struct mmc_blk_data *md = mq->data;
	struct mmc_card *card = md->queue.card;
	struct mmc_blk_request *brq = &mq->mqrq_cur->brq;
1960
	int ret = 1, disable_multi = 0, retry = 0, type, retune_retry_done = 0;
1961
	enum mmc_blk_status status;
1962
	struct mmc_queue_req *mq_rq;
1963
	struct request *req = rqc;
1964
	struct mmc_async_req *areq;
1965 1966
	const u8 packed_nr = 2;
	u8 reqs = 0;
L
Linus Torvalds 已提交
1967

1968 1969
	if (!rqc && !mq->mqrq_prev->req)
		return 0;
1970

1971 1972 1973
	if (rqc)
		reqs = mmc_blk_prep_packed_list(mq, rqc);

1974 1975
	do {
		if (rqc) {
1976 1977 1978 1979
			/*
			 * When 4KB native sector is enabled, only 8 blocks
			 * multiple read or write is allowed
			 */
1980 1981
			if (mmc_large_sector(card) &&
				!IS_ALIGNED(blk_rq_sectors(rqc), 8)) {
1982 1983
				pr_err("%s: Transfer size is not 4KB sector size aligned\n",
					req->rq_disk->disk_name);
1984
				mq_rq = mq->mqrq_cur;
1985 1986
				goto cmd_abort;
			}
1987 1988 1989 1990 1991 1992

			if (reqs >= packed_nr)
				mmc_blk_packed_hdr_wrq_prep(mq->mqrq_cur,
							    card, mq);
			else
				mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
1993 1994 1995 1996
			areq = &mq->mqrq_cur->mmc_active;
		} else
			areq = NULL;
		areq = mmc_start_req(card->host, areq, (int *) &status);
1997 1998 1999
		if (!areq) {
			if (status == MMC_BLK_NEW_REQUEST)
				mq->flags |= MMC_QUEUE_NEW_REQUEST;
2000
			return 0;
2001
		}
2002 2003 2004 2005

		mq_rq = container_of(areq, struct mmc_queue_req, mmc_active);
		brq = &mq_rq->brq;
		req = mq_rq->req;
2006
		type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE;
2007
		mmc_queue_bounce_post(mq_rq);
2008

2009 2010 2011 2012 2013 2014
		switch (status) {
		case MMC_BLK_SUCCESS:
		case MMC_BLK_PARTIAL:
			/*
			 * A block was successfully transferred.
			 */
2015
			mmc_blk_reset_success(md, type);
2016 2017 2018 2019 2020 2021

			if (mmc_packed_cmd(mq_rq->cmd_type)) {
				ret = mmc_blk_end_packed_req(mq_rq);
				break;
			} else {
				ret = blk_end_request(req, 0,
2022
						brq->data.bytes_xfered);
2023 2024
			}

2025 2026 2027 2028 2029
			/*
			 * If the blk_end_request function returns non-zero even
			 * though all data has been transferred and no errors
			 * were returned by the host controller, it's a bug.
			 */
2030
			if (status == MMC_BLK_SUCCESS && ret) {
2031
				pr_err("%s BUG rq_tot %d d_xfer %d\n",
2032 2033 2034 2035 2036
				       __func__, blk_rq_bytes(req),
				       brq->data.bytes_xfered);
				rqc = NULL;
				goto cmd_abort;
			}
2037 2038
			break;
		case MMC_BLK_CMD_ERR:
2039
			ret = mmc_blk_cmd_err(md, card, brq, req, ret);
2040 2041 2042 2043 2044
			if (mmc_blk_reset(md, card->host, type))
				goto cmd_abort;
			if (!ret)
				goto start_new_req;
			break;
2045
		case MMC_BLK_RETRY:
2046
			retune_retry_done = brq->retune_retry_done;
2047
			if (retry++ < 5)
2048
				break;
2049
			/* Fall through */
2050
		case MMC_BLK_ABORT:
2051 2052
			if (!mmc_blk_reset(md, card->host, type))
				break;
2053
			goto cmd_abort;
2054 2055 2056 2057 2058 2059
		case MMC_BLK_DATA_ERR: {
			int err;

			err = mmc_blk_reset(md, card->host, type);
			if (!err)
				break;
2060 2061
			if (err == -ENODEV ||
				mmc_packed_cmd(mq_rq->cmd_type))
2062 2063 2064 2065 2066 2067
				goto cmd_abort;
			/* Fall through */
		}
		case MMC_BLK_ECC_ERR:
			if (brq->data.blocks > 1) {
				/* Redo read one sector at a time */
J
Joe Perches 已提交
2068 2069
				pr_warn("%s: retrying using single block read\n",
					req->rq_disk->disk_name);
2070 2071 2072
				disable_multi = 1;
				break;
			}
2073 2074 2075 2076 2077
			/*
			 * After an error, we redo I/O one sector at a
			 * time, so we only reach here after trying to
			 * read a single sector.
			 */
2078
			ret = blk_end_request(req, -EIO,
2079
						brq->data.blksz);
2080 2081
			if (!ret)
				goto start_new_req;
2082
			break;
2083 2084
		case MMC_BLK_NOMEDIUM:
			goto cmd_abort;
2085 2086 2087 2088
		default:
			pr_err("%s: Unhandled return value (%d)",
					req->rq_disk->disk_name, status);
			goto cmd_abort;
2089 2090
		}

2091
		if (ret) {
2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108
			if (mmc_packed_cmd(mq_rq->cmd_type)) {
				if (!mq_rq->packed->retries)
					goto cmd_abort;
				mmc_blk_packed_hdr_wrq_prep(mq_rq, card, mq);
				mmc_start_req(card->host,
					      &mq_rq->mmc_active, NULL);
			} else {

				/*
				 * In case of a incomplete request
				 * prepare it again and resend.
				 */
				mmc_blk_rw_rq_prep(mq_rq, card,
						disable_multi, mq);
				mmc_start_req(card->host,
						&mq_rq->mmc_active, NULL);
			}
2109
			mq_rq->brq.retune_retry_done = retune_retry_done;
2110
		}
L
Linus Torvalds 已提交
2111 2112 2113 2114
	} while (ret);

	return 1;

2115
 cmd_abort:
2116 2117 2118 2119 2120 2121 2122 2123 2124
	if (mmc_packed_cmd(mq_rq->cmd_type)) {
		mmc_blk_abort_packed_req(mq_rq);
	} else {
		if (mmc_card_removed(card))
			req->cmd_flags |= REQ_QUIET;
		while (ret)
			ret = blk_end_request(req, -EIO,
					blk_rq_cur_bytes(req));
	}
L
Linus Torvalds 已提交
2125

2126 2127
 start_new_req:
	if (rqc) {
2128 2129 2130 2131
		if (mmc_card_removed(card)) {
			rqc->cmd_flags |= REQ_QUIET;
			blk_end_request_all(rqc, -EIO);
		} else {
2132 2133 2134 2135 2136 2137
			/*
			 * If current request is packed, it needs to put back.
			 */
			if (mmc_packed_cmd(mq->mqrq_cur->cmd_type))
				mmc_blk_revert_packed_req(mq, mq->mqrq_cur);

2138 2139 2140 2141
			mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq);
			mmc_start_req(card->host,
				      &mq->mqrq_cur->mmc_active, NULL);
		}
2142 2143
	}

L
Linus Torvalds 已提交
2144 2145 2146
	return 0;
}

A
Adrian Hunter 已提交
2147 2148
static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
{
2149 2150 2151
	int ret;
	struct mmc_blk_data *md = mq->data;
	struct mmc_card *card = md->queue.card;
2152 2153
	struct mmc_host *host = card->host;
	unsigned long flags;
2154

2155 2156
	if (req && !mq->mqrq_prev->req)
		/* claim host only for the first request */
2157
		mmc_get_card(card);
2158

2159 2160
	ret = mmc_blk_part_switch(card, md);
	if (ret) {
2161
		if (req) {
2162
			blk_end_request_all(req, -EIO);
2163
		}
2164 2165 2166
		ret = 0;
		goto out;
	}
2167

2168
	mq->flags &= ~MMC_QUEUE_NEW_REQUEST;
M
Mike Christie 已提交
2169
	if (req && req_op(req) == REQ_OP_DISCARD) {
2170 2171 2172
		/* complete ongoing async transfer before issuing discard */
		if (card->host->areq)
			mmc_blk_issue_rw_rq(mq, NULL);
2173 2174 2175 2176 2177 2178
		ret = mmc_blk_issue_discard_rq(mq, req);
	} else if (req && req_op(req) == REQ_OP_SECURE_ERASE) {
		/* complete ongoing async transfer before issuing secure erase*/
		if (card->host->areq)
			mmc_blk_issue_rw_rq(mq, NULL);
		ret = mmc_blk_issue_secdiscard_rq(mq, req);
2179
	} else if (req && req_op(req) == REQ_OP_FLUSH) {
2180 2181 2182
		/* complete ongoing async transfer before issuing flush */
		if (card->host->areq)
			mmc_blk_issue_rw_rq(mq, NULL);
2183
		ret = mmc_blk_issue_flush(mq, req);
2184
	} else {
2185 2186 2187 2188 2189
		if (!req && host->areq) {
			spin_lock_irqsave(&host->context_info.lock, flags);
			host->context_info.is_waiting_last_req = true;
			spin_unlock_irqrestore(&host->context_info.lock, flags);
		}
2190
		ret = mmc_blk_issue_rw_rq(mq, req);
2191
	}
2192

2193
out:
2194
	if ((!req && !(mq->flags & MMC_QUEUE_NEW_REQUEST)) ||
M
Mike Christie 已提交
2195
	    mmc_req_is_special(req))
2196 2197 2198 2199 2200 2201
		/*
		 * Release host when there are no more requests
		 * and after special request(discard, flush) is done.
		 * In case sepecial request, there is no reentry to
		 * the 'mmc_blk_issue_rq' with 'mqrq_prev->req'.
		 */
2202
		mmc_put_card(card);
2203
	return ret;
A
Adrian Hunter 已提交
2204
}
L
Linus Torvalds 已提交
2205

2206 2207 2208 2209 2210 2211
static inline int mmc_blk_readonly(struct mmc_card *card)
{
	return mmc_card_readonly(card) ||
	       !(card->csd.cmdclass & CCC_BLOCK_WRITE);
}

2212 2213 2214 2215
static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
					      struct device *parent,
					      sector_t size,
					      bool default_ro,
2216 2217
					      const char *subname,
					      int area_type)
L
Linus Torvalds 已提交
2218 2219 2220 2221
{
	struct mmc_blk_data *md;
	int devidx, ret;

2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238
again:
	if (!ida_pre_get(&mmc_blk_ida, GFP_KERNEL))
		return ERR_PTR(-ENOMEM);

	spin_lock(&mmc_blk_lock);
	ret = ida_get_new(&mmc_blk_ida, &devidx);
	spin_unlock(&mmc_blk_lock);

	if (ret == -EAGAIN)
		goto again;
	else if (ret)
		return ERR_PTR(ret);

	if (devidx >= max_devices) {
		ret = -ENOSPC;
		goto out;
	}
L
Linus Torvalds 已提交
2239

2240
	md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL);
2241 2242 2243 2244
	if (!md) {
		ret = -ENOMEM;
		goto out;
	}
L
Linus Torvalds 已提交
2245

2246 2247
	md->area_type = area_type;

2248 2249 2250 2251 2252
	/*
	 * Set the read-only status based on the supported commands
	 * and the write protect switch.
	 */
	md->read_only = mmc_blk_readonly(card);
L
Linus Torvalds 已提交
2253

2254
	md->disk = alloc_disk(perdev_minors);
2255 2256 2257 2258
	if (md->disk == NULL) {
		ret = -ENOMEM;
		goto err_kfree;
	}
L
Linus Torvalds 已提交
2259

2260
	spin_lock_init(&md->lock);
2261
	INIT_LIST_HEAD(&md->part);
2262
	md->usage = 1;
L
Linus Torvalds 已提交
2263

2264
	ret = mmc_init_queue(&md->queue, card, &md->lock, subname);
2265 2266
	if (ret)
		goto err_putdisk;
L
Linus Torvalds 已提交
2267

2268 2269
	md->queue.issue_fn = mmc_blk_issue_rq;
	md->queue.data = md;
2270

2271
	md->disk->major	= MMC_BLOCK_MAJOR;
2272
	md->disk->first_minor = devidx * perdev_minors;
2273 2274 2275
	md->disk->fops = &mmc_bdops;
	md->disk->private_data = md;
	md->disk->queue = md->queue.queue;
2276
	md->parent = parent;
2277
	set_disk_ro(md->disk, md->read_only || default_ro);
2278
	md->disk->flags = GENHD_FL_EXT_DEVT;
2279
	if (area_type & (MMC_BLK_DATA_AREA_RPMB | MMC_BLK_DATA_AREA_BOOT))
2280
		md->disk->flags |= GENHD_FL_NO_PART_SCAN;
2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293

	/*
	 * As discussed on lkml, GENHD_FL_REMOVABLE should:
	 *
	 * - be set for removable media with permanent block devices
	 * - be unset for removable block devices with permanent media
	 *
	 * Since MMC block devices clearly fall under the second
	 * case, we do not set GENHD_FL_REMOVABLE.  Userspace
	 * should use the block device creation/destruction hotplug
	 * messages to tell when the card is present.
	 */

2294
	snprintf(md->disk->disk_name, sizeof(md->disk->disk_name),
2295
		 "mmcblk%u%s", card->host->index, subname ? subname : "");
2296

2297 2298 2299 2300 2301 2302
	if (mmc_card_mmc(card))
		blk_queue_logical_block_size(md->queue.queue,
					     card->ext_csd.data_sector_size);
	else
		blk_queue_logical_block_size(md->queue.queue, 512);

2303
	set_capacity(md->disk, size);
2304

2305 2306 2307 2308 2309 2310
	if (mmc_host_cmd23(card->host)) {
		if (mmc_card_mmc(card) ||
		    (mmc_card_sd(card) &&
		     card->scr.cmds & SD_SCR_CMD23_SUPPORT))
			md->flags |= MMC_BLK_CMD23;
	}
2311 2312 2313 2314 2315 2316

	if (mmc_card_mmc(card) &&
	    md->flags & MMC_BLK_CMD23 &&
	    ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) ||
	     card->ext_csd.rel_sectors)) {
		md->flags |= MMC_BLK_REL_WR;
2317
		blk_queue_write_cache(md->queue.queue, true, true);
2318 2319
	}

2320 2321 2322 2323 2324 2325 2326 2327
	if (mmc_card_mmc(card) &&
	    (area_type == MMC_BLK_DATA_AREA_MAIN) &&
	    (md->flags & MMC_BLK_CMD23) &&
	    card->ext_csd.packed_event_en) {
		if (!mmc_packed_init(&md->queue, card))
			md->flags |= MMC_BLK_PACKED_CMD;
	}

2328 2329 2330 2331 2332 2333 2334
	return md;

 err_putdisk:
	put_disk(md->disk);
 err_kfree:
	kfree(md);
 out:
2335 2336 2337
	spin_lock(&mmc_blk_lock);
	ida_remove(&mmc_blk_ida, devidx);
	spin_unlock(&mmc_blk_lock);
2338 2339 2340 2341 2342 2343
	return ERR_PTR(ret);
}

static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card)
{
	sector_t size;
2344

P
Pierre Ossman 已提交
2345 2346 2347 2348 2349
	if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) {
		/*
		 * The EXT_CSD sector count is in number or 512 byte
		 * sectors.
		 */
2350
		size = card->ext_csd.sectors;
P
Pierre Ossman 已提交
2351 2352 2353 2354 2355
	} else {
		/*
		 * The CSD capacity field is in units of read_blkbits.
		 * set_capacity takes units of 512 bytes.
		 */
2356 2357
		size = (typeof(sector_t))card->csd.capacity
			<< (card->csd.read_blkbits - 9);
P
Pierre Ossman 已提交
2358
	}
2359

2360
	return mmc_blk_alloc_req(card, &card->dev, size, false, NULL,
2361
					MMC_BLK_DATA_AREA_MAIN);
2362
}
2363

2364 2365 2366 2367 2368
static int mmc_blk_alloc_part(struct mmc_card *card,
			      struct mmc_blk_data *md,
			      unsigned int part_type,
			      sector_t size,
			      bool default_ro,
2369 2370
			      const char *subname,
			      int area_type)
2371 2372 2373 2374 2375
{
	char cap_str[10];
	struct mmc_blk_data *part_md;

	part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro,
2376
				    subname, area_type);
2377 2378 2379 2380 2381
	if (IS_ERR(part_md))
		return PTR_ERR(part_md);
	part_md->part_type = part_type;
	list_add(&part_md->part, &md->part);

2382
	string_get_size((u64)get_capacity(part_md->disk), 512, STRING_UNITS_2,
2383
			cap_str, sizeof(cap_str));
2384
	pr_info("%s: %s %s partition %u %s\n",
2385 2386 2387 2388 2389
	       part_md->disk->disk_name, mmc_card_id(card),
	       mmc_card_name(card), part_md->part_type, cap_str);
	return 0;
}

2390 2391 2392 2393 2394 2395
/* MMC Physical partitions consist of two boot partitions and
 * up to four general purpose partitions.
 * For each partition enabled in EXT_CSD a block device will be allocatedi
 * to provide access to the partition.
 */

2396 2397
static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md)
{
2398
	int idx, ret = 0;
2399 2400 2401 2402

	if (!mmc_card_mmc(card))
		return 0;

2403 2404 2405 2406 2407 2408
	for (idx = 0; idx < card->nr_parts; idx++) {
		if (card->part[idx].size) {
			ret = mmc_blk_alloc_part(card, md,
				card->part[idx].part_cfg,
				card->part[idx].size >> 9,
				card->part[idx].force_ro,
2409 2410
				card->part[idx].name,
				card->part[idx].area_type);
2411 2412 2413
			if (ret)
				return ret;
		}
2414 2415 2416
	}

	return ret;
L
Linus Torvalds 已提交
2417 2418
}

2419 2420
static void mmc_blk_remove_req(struct mmc_blk_data *md)
{
2421 2422
	struct mmc_card *card;

2423
	if (md) {
2424 2425 2426 2427 2428
		/*
		 * Flush remaining requests and free queues. It
		 * is freeing the queue that stops new requests
		 * from being accepted.
		 */
2429
		card = md->queue.card;
2430 2431 2432
		mmc_cleanup_queue(&md->queue);
		if (md->flags & MMC_BLK_PACKED_CMD)
			mmc_packed_clean(&md->queue);
2433 2434
		if (md->disk->flags & GENHD_FL_UP) {
			device_remove_file(disk_to_dev(md->disk), &md->force_ro);
2435 2436 2437 2438
			if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
					card->ext_csd.boot_ro_lockable)
				device_remove_file(disk_to_dev(md->disk),
					&md->power_ro_lock);
2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461

			del_gendisk(md->disk);
		}
		mmc_blk_put(md);
	}
}

static void mmc_blk_remove_parts(struct mmc_card *card,
				 struct mmc_blk_data *md)
{
	struct list_head *pos, *q;
	struct mmc_blk_data *part_md;

	list_for_each_safe(pos, q, &md->part) {
		part_md = list_entry(pos, struct mmc_blk_data, part);
		list_del(pos);
		mmc_blk_remove_req(part_md);
	}
}

static int mmc_add_disk(struct mmc_blk_data *md)
{
	int ret;
2462
	struct mmc_card *card = md->queue.card;
2463

2464
	device_add_disk(md->parent, md->disk);
2465 2466
	md->force_ro.show = force_ro_show;
	md->force_ro.store = force_ro_store;
2467
	sysfs_attr_init(&md->force_ro.attr);
2468 2469 2470 2471
	md->force_ro.attr.name = "force_ro";
	md->force_ro.attr.mode = S_IRUGO | S_IWUSR;
	ret = device_create_file(disk_to_dev(md->disk), &md->force_ro);
	if (ret)
2472 2473 2474 2475
		goto force_ro_fail;

	if ((md->area_type & MMC_BLK_DATA_AREA_BOOT) &&
	     card->ext_csd.boot_ro_lockable) {
A
Al Viro 已提交
2476
		umode_t mode;
2477 2478 2479 2480 2481 2482 2483 2484

		if (card->ext_csd.boot_ro_lock & EXT_CSD_BOOT_WP_B_PWR_WP_DIS)
			mode = S_IRUGO;
		else
			mode = S_IRUGO | S_IWUSR;

		md->power_ro_lock.show = power_ro_lock_show;
		md->power_ro_lock.store = power_ro_lock_store;
2485
		sysfs_attr_init(&md->power_ro_lock.attr);
2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499
		md->power_ro_lock.attr.mode = mode;
		md->power_ro_lock.attr.name =
					"ro_lock_until_next_power_on";
		ret = device_create_file(disk_to_dev(md->disk),
				&md->power_ro_lock);
		if (ret)
			goto power_ro_lock_fail;
	}
	return ret;

power_ro_lock_fail:
	device_remove_file(disk_to_dev(md->disk), &md->force_ro);
force_ro_fail:
	del_gendisk(md->disk);
2500 2501 2502 2503

	return ret;
}

2504 2505
static const struct mmc_fixup blk_fixups[] =
{
2506 2507 2508 2509 2510 2511 2512 2513 2514 2515
	MMC_FIXUP("SEM02G", CID_MANFID_SANDISK, 0x100, add_quirk,
		  MMC_QUIRK_INAND_CMD38),
	MMC_FIXUP("SEM04G", CID_MANFID_SANDISK, 0x100, add_quirk,
		  MMC_QUIRK_INAND_CMD38),
	MMC_FIXUP("SEM08G", CID_MANFID_SANDISK, 0x100, add_quirk,
		  MMC_QUIRK_INAND_CMD38),
	MMC_FIXUP("SEM16G", CID_MANFID_SANDISK, 0x100, add_quirk,
		  MMC_QUIRK_INAND_CMD38),
	MMC_FIXUP("SEM32G", CID_MANFID_SANDISK, 0x100, add_quirk,
		  MMC_QUIRK_INAND_CMD38),
2516 2517 2518 2519 2520 2521 2522 2523 2524

	/*
	 * Some MMC cards experience performance degradation with CMD23
	 * instead of CMD12-bounded multiblock transfers. For now we'll
	 * black list what's bad...
	 * - Certain Toshiba cards.
	 *
	 * N.B. This doesn't affect SD cards.
	 */
2525 2526 2527 2528
	MMC_FIXUP("SDMB-32", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
		  MMC_QUIRK_BLK_NO_CMD23),
	MMC_FIXUP("SDM032", CID_MANFID_SANDISK, CID_OEMID_ANY, add_quirk_mmc,
		  MMC_QUIRK_BLK_NO_CMD23),
2529
	MMC_FIXUP("MMC08G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2530
		  MMC_QUIRK_BLK_NO_CMD23),
2531
	MMC_FIXUP("MMC16G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2532
		  MMC_QUIRK_BLK_NO_CMD23),
2533
	MMC_FIXUP("MMC32G", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
2534
		  MMC_QUIRK_BLK_NO_CMD23),
2535 2536

	/*
2537
	 * Some MMC cards need longer data read timeout than indicated in CSD.
2538
	 */
2539
	MMC_FIXUP(CID_NAME_ANY, CID_MANFID_MICRON, 0x200, add_quirk_mmc,
2540
		  MMC_QUIRK_LONG_READ_TIME),
2541 2542
	MMC_FIXUP("008GE0", CID_MANFID_TOSHIBA, CID_OEMID_ANY, add_quirk_mmc,
		  MMC_QUIRK_LONG_READ_TIME),
2543

2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565
	/*
	 * On these Samsung MoviNAND parts, performing secure erase or
	 * secure trim can result in unrecoverable corruption due to a
	 * firmware bug.
	 */
	MMC_FIXUP("M8G2FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
		  MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
	MMC_FIXUP("MAG4FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
		  MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
	MMC_FIXUP("MBG8FA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
		  MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
	MMC_FIXUP("MCGAFA", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
		  MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
	MMC_FIXUP("VAL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
		  MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
	MMC_FIXUP("VYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
		  MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
	MMC_FIXUP("KYL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
		  MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),
	MMC_FIXUP("VZL00M", CID_MANFID_SAMSUNG, CID_OEMID_ANY, add_quirk_mmc,
		  MMC_QUIRK_SEC_ERASE_TRIM_BROKEN),

2566 2567 2568 2569 2570 2571 2572 2573 2574
	/*
	 *  On Some Kingston eMMCs, performing trim can result in
	 *  unrecoverable data conrruption occasionally due to a firmware bug.
	 */
	MMC_FIXUP("V10008", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
		  MMC_QUIRK_TRIM_BROKEN),
	MMC_FIXUP("V10016", CID_MANFID_KINGSTON, CID_OEMID_ANY, add_quirk_mmc,
		  MMC_QUIRK_TRIM_BROKEN),

2575 2576 2577
	END_FIXUP
};

2578
static int mmc_blk_probe(struct mmc_card *card)
L
Linus Torvalds 已提交
2579
{
2580
	struct mmc_blk_data *md, *part_md;
2581 2582
	char cap_str[10];

2583 2584 2585 2586
	/*
	 * Check that the card supports the command class(es) we need.
	 */
	if (!(card->csd.cmdclass & CCC_BLOCK_READ))
L
Linus Torvalds 已提交
2587 2588
		return -ENODEV;

2589 2590
	mmc_fixup_device(card, blk_fixups);

L
Linus Torvalds 已提交
2591 2592 2593 2594
	md = mmc_blk_alloc(card);
	if (IS_ERR(md))
		return PTR_ERR(md);

2595
	string_get_size((u64)get_capacity(md->disk), 512, STRING_UNITS_2,
2596
			cap_str, sizeof(cap_str));
2597
	pr_info("%s: %s %s %s %s\n",
L
Linus Torvalds 已提交
2598
		md->disk->disk_name, mmc_card_id(card), mmc_card_name(card),
2599
		cap_str, md->read_only ? "(ro)" : "");
L
Linus Torvalds 已提交
2600

2601 2602 2603
	if (mmc_blk_alloc_parts(card, md))
		goto out;

2604
	dev_set_drvdata(&card->dev, md);
2605

2606 2607 2608 2609 2610 2611 2612
	if (mmc_add_disk(md))
		goto out;

	list_for_each_entry(part_md, &md->part, part) {
		if (mmc_add_disk(part_md))
			goto out;
	}
2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625

	pm_runtime_set_autosuspend_delay(&card->dev, 3000);
	pm_runtime_use_autosuspend(&card->dev);

	/*
	 * Don't enable runtime PM for SD-combo cards here. Leave that
	 * decision to be taken during the SDIO init sequence instead.
	 */
	if (card->type != MMC_TYPE_SD_COMBO) {
		pm_runtime_set_active(&card->dev);
		pm_runtime_enable(&card->dev);
	}

L
Linus Torvalds 已提交
2626 2627 2628
	return 0;

 out:
2629 2630
	mmc_blk_remove_parts(card, md);
	mmc_blk_remove_req(md);
2631
	return 0;
L
Linus Torvalds 已提交
2632 2633
}

2634
static void mmc_blk_remove(struct mmc_card *card)
L
Linus Torvalds 已提交
2635
{
2636
	struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
L
Linus Torvalds 已提交
2637

2638
	mmc_blk_remove_parts(card, md);
2639
	pm_runtime_get_sync(&card->dev);
2640 2641 2642
	mmc_claim_host(card->host);
	mmc_blk_part_switch(card, md);
	mmc_release_host(card->host);
2643 2644 2645
	if (card->type != MMC_TYPE_SD_COMBO)
		pm_runtime_disable(&card->dev);
	pm_runtime_put_noidle(&card->dev);
2646
	mmc_blk_remove_req(md);
2647
	dev_set_drvdata(&card->dev, NULL);
L
Linus Torvalds 已提交
2648 2649
}

2650
static int _mmc_blk_suspend(struct mmc_card *card)
L
Linus Torvalds 已提交
2651
{
2652
	struct mmc_blk_data *part_md;
2653
	struct mmc_blk_data *md = dev_get_drvdata(&card->dev);
L
Linus Torvalds 已提交
2654 2655 2656

	if (md) {
		mmc_queue_suspend(&md->queue);
2657 2658 2659
		list_for_each_entry(part_md, &md->part, part) {
			mmc_queue_suspend(&part_md->queue);
		}
L
Linus Torvalds 已提交
2660 2661 2662 2663
	}
	return 0;
}

2664
static void mmc_blk_shutdown(struct mmc_card *card)
2665
{
2666
	_mmc_blk_suspend(card);
2667 2668
}

2669 2670
#ifdef CONFIG_PM_SLEEP
static int mmc_blk_suspend(struct device *dev)
2671
{
2672 2673 2674
	struct mmc_card *card = mmc_dev_to_card(dev);

	return _mmc_blk_suspend(card);
2675 2676
}

2677
static int mmc_blk_resume(struct device *dev)
L
Linus Torvalds 已提交
2678
{
2679
	struct mmc_blk_data *part_md;
2680
	struct mmc_blk_data *md = dev_get_drvdata(dev);
L
Linus Torvalds 已提交
2681 2682

	if (md) {
2683 2684 2685 2686 2687
		/*
		 * Resume involves the card going into idle state,
		 * so current partition is always the main one.
		 */
		md->part_curr = md->part_type;
L
Linus Torvalds 已提交
2688
		mmc_queue_resume(&md->queue);
2689 2690 2691
		list_for_each_entry(part_md, &md->part, part) {
			mmc_queue_resume(&part_md->queue);
		}
L
Linus Torvalds 已提交
2692 2693 2694 2695 2696
	}
	return 0;
}
#endif

2697 2698
static SIMPLE_DEV_PM_OPS(mmc_blk_pm_ops, mmc_blk_suspend, mmc_blk_resume);

2699 2700 2701 2702 2703
static struct mmc_driver mmc_driver = {
	.drv		= {
		.name	= "mmcblk",
		.pm	= &mmc_blk_pm_ops,
	},
L
Linus Torvalds 已提交
2704 2705
	.probe		= mmc_blk_probe,
	.remove		= mmc_blk_remove,
2706
	.shutdown	= mmc_blk_shutdown,
L
Linus Torvalds 已提交
2707 2708 2709 2710
};

static int __init mmc_blk_init(void)
{
2711
	int res;
L
Linus Torvalds 已提交
2712

2713 2714 2715
	if (perdev_minors != CONFIG_MMC_BLOCK_MINORS)
		pr_info("mmcblk: using %d minors per device\n", perdev_minors);

B
Ben Hutchings 已提交
2716
	max_devices = min(MAX_DEVICES, (1 << MINORBITS) / perdev_minors);
2717

2718 2719
	res = register_blkdev(MMC_BLOCK_MAJOR, "mmc");
	if (res)
L
Linus Torvalds 已提交
2720 2721
		goto out;

2722 2723 2724
	res = mmc_register_driver(&mmc_driver);
	if (res)
		goto out2;
L
Linus Torvalds 已提交
2725

2726 2727 2728
	return 0;
 out2:
	unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
L
Linus Torvalds 已提交
2729 2730 2731 2732 2733 2734 2735
 out:
	return res;
}

static void __exit mmc_blk_exit(void)
{
	mmc_unregister_driver(&mmc_driver);
2736
	unregister_blkdev(MMC_BLOCK_MAJOR, "mmc");
L
Linus Torvalds 已提交
2737 2738 2739 2740 2741 2742 2743 2744
}

module_init(mmc_blk_init);
module_exit(mmc_blk_exit);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver");