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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Block driver for media (i.e., flash cards) | |
3 | * | |
4 | * Copyright 2002 Hewlett-Packard Company | |
979ce720 | 5 | * Copyright 2005-2008 Pierre Ossman |
1da177e4 LT |
6 | * |
7 | * Use consistent with the GNU GPL is permitted, | |
8 | * provided that this copyright notice is | |
9 | * preserved in its entirety in all copies and derived works. | |
10 | * | |
11 | * HEWLETT-PACKARD COMPANY MAKES NO WARRANTIES, EXPRESSED OR IMPLIED, | |
12 | * AS TO THE USEFULNESS OR CORRECTNESS OF THIS CODE OR ITS | |
13 | * FITNESS FOR ANY PARTICULAR PURPOSE. | |
14 | * | |
15 | * Many thanks to Alessandro Rubini and Jonathan Corbet! | |
16 | * | |
17 | * Author: Andrew Christian | |
18 | * 28 May 2002 | |
19 | */ | |
20 | #include <linux/moduleparam.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/init.h> | |
23 | ||
1da177e4 LT |
24 | #include <linux/kernel.h> |
25 | #include <linux/fs.h> | |
5a0e3ad6 | 26 | #include <linux/slab.h> |
1da177e4 LT |
27 | #include <linux/errno.h> |
28 | #include <linux/hdreg.h> | |
29 | #include <linux/kdev_t.h> | |
30 | #include <linux/blkdev.h> | |
a621aaed | 31 | #include <linux/mutex.h> |
ec5a19dd | 32 | #include <linux/scatterlist.h> |
a7bbb573 | 33 | #include <linux/string_helpers.h> |
cb87ea28 JC |
34 | #include <linux/delay.h> |
35 | #include <linux/capability.h> | |
36 | #include <linux/compat.h> | |
1da177e4 | 37 | |
cb87ea28 | 38 | #include <linux/mmc/ioctl.h> |
1da177e4 | 39 | #include <linux/mmc/card.h> |
385e3227 | 40 | #include <linux/mmc/host.h> |
da7fbe58 PO |
41 | #include <linux/mmc/mmc.h> |
42 | #include <linux/mmc/sd.h> | |
1da177e4 LT |
43 | |
44 | #include <asm/system.h> | |
45 | #include <asm/uaccess.h> | |
46 | ||
98ac2162 | 47 | #include "queue.h" |
1da177e4 | 48 | |
6b0b6285 | 49 | MODULE_ALIAS("mmc:block"); |
5e71b7a6 OJ |
50 | #ifdef MODULE_PARAM_PREFIX |
51 | #undef MODULE_PARAM_PREFIX | |
52 | #endif | |
53 | #define MODULE_PARAM_PREFIX "mmcblk." | |
54 | ||
6a7a6b45 AW |
55 | #define INAND_CMD38_ARG_EXT_CSD 113 |
56 | #define INAND_CMD38_ARG_ERASE 0x00 | |
57 | #define INAND_CMD38_ARG_TRIM 0x01 | |
58 | #define INAND_CMD38_ARG_SECERASE 0x80 | |
59 | #define INAND_CMD38_ARG_SECTRIM1 0x81 | |
60 | #define INAND_CMD38_ARG_SECTRIM2 0x88 | |
61 | ||
5e71b7a6 | 62 | static DEFINE_MUTEX(block_mutex); |
6b0b6285 | 63 | |
1da177e4 | 64 | /* |
5e71b7a6 OJ |
65 | * The defaults come from config options but can be overriden by module |
66 | * or bootarg options. | |
1da177e4 | 67 | */ |
5e71b7a6 | 68 | static int perdev_minors = CONFIG_MMC_BLOCK_MINORS; |
1dff3144 | 69 | |
5e71b7a6 OJ |
70 | /* |
71 | * We've only got one major, so number of mmcblk devices is | |
72 | * limited to 256 / number of minors per device. | |
73 | */ | |
74 | static int max_devices; | |
75 | ||
76 | /* 256 minors, so at most 256 separate devices */ | |
77 | static DECLARE_BITMAP(dev_use, 256); | |
f06c9153 | 78 | static DECLARE_BITMAP(name_use, 256); |
1da177e4 | 79 | |
1da177e4 LT |
80 | /* |
81 | * There is one mmc_blk_data per slot. | |
82 | */ | |
83 | struct mmc_blk_data { | |
84 | spinlock_t lock; | |
85 | struct gendisk *disk; | |
86 | struct mmc_queue queue; | |
371a689f | 87 | struct list_head part; |
1da177e4 | 88 | |
d0c97cfb AW |
89 | unsigned int flags; |
90 | #define MMC_BLK_CMD23 (1 << 0) /* Can do SET_BLOCK_COUNT for multiblock */ | |
91 | #define MMC_BLK_REL_WR (1 << 1) /* MMC Reliable write support */ | |
92 | ||
1da177e4 | 93 | unsigned int usage; |
a6f6c96b | 94 | unsigned int read_only; |
371a689f | 95 | unsigned int part_type; |
f06c9153 | 96 | unsigned int name_idx; |
67716327 AH |
97 | unsigned int reset_done; |
98 | #define MMC_BLK_READ BIT(0) | |
99 | #define MMC_BLK_WRITE BIT(1) | |
100 | #define MMC_BLK_DISCARD BIT(2) | |
101 | #define MMC_BLK_SECDISCARD BIT(3) | |
371a689f AW |
102 | |
103 | /* | |
104 | * Only set in main mmc_blk_data associated | |
105 | * with mmc_card with mmc_set_drvdata, and keeps | |
106 | * track of the current selected device partition. | |
107 | */ | |
108 | unsigned int part_curr; | |
109 | struct device_attribute force_ro; | |
1da177e4 LT |
110 | }; |
111 | ||
a621aaed | 112 | static DEFINE_MUTEX(open_lock); |
1da177e4 | 113 | |
d78d4a8a PF |
114 | enum mmc_blk_status { |
115 | MMC_BLK_SUCCESS = 0, | |
116 | MMC_BLK_PARTIAL, | |
d78d4a8a | 117 | MMC_BLK_CMD_ERR, |
67716327 | 118 | MMC_BLK_RETRY, |
d78d4a8a | 119 | MMC_BLK_ABORT, |
67716327 AH |
120 | MMC_BLK_DATA_ERR, |
121 | MMC_BLK_ECC_ERR, | |
d78d4a8a PF |
122 | }; |
123 | ||
5e71b7a6 OJ |
124 | module_param(perdev_minors, int, 0444); |
125 | MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device"); | |
126 | ||
1da177e4 LT |
127 | static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk) |
128 | { | |
129 | struct mmc_blk_data *md; | |
130 | ||
a621aaed | 131 | mutex_lock(&open_lock); |
1da177e4 LT |
132 | md = disk->private_data; |
133 | if (md && md->usage == 0) | |
134 | md = NULL; | |
135 | if (md) | |
136 | md->usage++; | |
a621aaed | 137 | mutex_unlock(&open_lock); |
1da177e4 LT |
138 | |
139 | return md; | |
140 | } | |
141 | ||
371a689f AW |
142 | static inline int mmc_get_devidx(struct gendisk *disk) |
143 | { | |
144 | int devmaj = MAJOR(disk_devt(disk)); | |
145 | int devidx = MINOR(disk_devt(disk)) / perdev_minors; | |
146 | ||
147 | if (!devmaj) | |
148 | devidx = disk->first_minor / perdev_minors; | |
149 | return devidx; | |
150 | } | |
151 | ||
1da177e4 LT |
152 | static void mmc_blk_put(struct mmc_blk_data *md) |
153 | { | |
a621aaed | 154 | mutex_lock(&open_lock); |
1da177e4 LT |
155 | md->usage--; |
156 | if (md->usage == 0) { | |
371a689f | 157 | int devidx = mmc_get_devidx(md->disk); |
5fa83ce2 AH |
158 | blk_cleanup_queue(md->queue.queue); |
159 | ||
1dff3144 DW |
160 | __clear_bit(devidx, dev_use); |
161 | ||
1da177e4 | 162 | put_disk(md->disk); |
1da177e4 LT |
163 | kfree(md); |
164 | } | |
a621aaed | 165 | mutex_unlock(&open_lock); |
1da177e4 LT |
166 | } |
167 | ||
371a689f AW |
168 | static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr, |
169 | char *buf) | |
170 | { | |
171 | int ret; | |
172 | struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev)); | |
173 | ||
174 | ret = snprintf(buf, PAGE_SIZE, "%d", | |
175 | get_disk_ro(dev_to_disk(dev)) ^ | |
176 | md->read_only); | |
177 | mmc_blk_put(md); | |
178 | return ret; | |
179 | } | |
180 | ||
181 | static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr, | |
182 | const char *buf, size_t count) | |
183 | { | |
184 | int ret; | |
185 | char *end; | |
186 | struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev)); | |
187 | unsigned long set = simple_strtoul(buf, &end, 0); | |
188 | if (end == buf) { | |
189 | ret = -EINVAL; | |
190 | goto out; | |
191 | } | |
192 | ||
193 | set_disk_ro(dev_to_disk(dev), set || md->read_only); | |
194 | ret = count; | |
195 | out: | |
196 | mmc_blk_put(md); | |
197 | return ret; | |
198 | } | |
199 | ||
a5a1561f | 200 | static int mmc_blk_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 201 | { |
a5a1561f | 202 | struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk); |
1da177e4 LT |
203 | int ret = -ENXIO; |
204 | ||
2a48fc0a | 205 | mutex_lock(&block_mutex); |
1da177e4 LT |
206 | if (md) { |
207 | if (md->usage == 2) | |
a5a1561f | 208 | check_disk_change(bdev); |
1da177e4 | 209 | ret = 0; |
a00fc090 | 210 | |
a5a1561f | 211 | if ((mode & FMODE_WRITE) && md->read_only) { |
70bb0896 | 212 | mmc_blk_put(md); |
a00fc090 | 213 | ret = -EROFS; |
70bb0896 | 214 | } |
1da177e4 | 215 | } |
2a48fc0a | 216 | mutex_unlock(&block_mutex); |
1da177e4 LT |
217 | |
218 | return ret; | |
219 | } | |
220 | ||
a5a1561f | 221 | static int mmc_blk_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 222 | { |
a5a1561f | 223 | struct mmc_blk_data *md = disk->private_data; |
1da177e4 | 224 | |
2a48fc0a | 225 | mutex_lock(&block_mutex); |
1da177e4 | 226 | mmc_blk_put(md); |
2a48fc0a | 227 | mutex_unlock(&block_mutex); |
1da177e4 LT |
228 | return 0; |
229 | } | |
230 | ||
231 | static int | |
a885c8c4 | 232 | mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 | 233 | { |
a885c8c4 CH |
234 | geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16); |
235 | geo->heads = 4; | |
236 | geo->sectors = 16; | |
237 | return 0; | |
1da177e4 LT |
238 | } |
239 | ||
cb87ea28 JC |
240 | struct mmc_blk_ioc_data { |
241 | struct mmc_ioc_cmd ic; | |
242 | unsigned char *buf; | |
243 | u64 buf_bytes; | |
244 | }; | |
245 | ||
246 | static struct mmc_blk_ioc_data *mmc_blk_ioctl_copy_from_user( | |
247 | struct mmc_ioc_cmd __user *user) | |
248 | { | |
249 | struct mmc_blk_ioc_data *idata; | |
250 | int err; | |
251 | ||
252 | idata = kzalloc(sizeof(*idata), GFP_KERNEL); | |
253 | if (!idata) { | |
254 | err = -ENOMEM; | |
aea253ec | 255 | goto out; |
cb87ea28 JC |
256 | } |
257 | ||
258 | if (copy_from_user(&idata->ic, user, sizeof(idata->ic))) { | |
259 | err = -EFAULT; | |
aea253ec | 260 | goto idata_err; |
cb87ea28 JC |
261 | } |
262 | ||
263 | idata->buf_bytes = (u64) idata->ic.blksz * idata->ic.blocks; | |
264 | if (idata->buf_bytes > MMC_IOC_MAX_BYTES) { | |
265 | err = -EOVERFLOW; | |
aea253ec | 266 | goto idata_err; |
cb87ea28 JC |
267 | } |
268 | ||
269 | idata->buf = kzalloc(idata->buf_bytes, GFP_KERNEL); | |
270 | if (!idata->buf) { | |
271 | err = -ENOMEM; | |
aea253ec | 272 | goto idata_err; |
cb87ea28 JC |
273 | } |
274 | ||
275 | if (copy_from_user(idata->buf, (void __user *)(unsigned long) | |
276 | idata->ic.data_ptr, idata->buf_bytes)) { | |
277 | err = -EFAULT; | |
278 | goto copy_err; | |
279 | } | |
280 | ||
281 | return idata; | |
282 | ||
283 | copy_err: | |
284 | kfree(idata->buf); | |
aea253ec | 285 | idata_err: |
cb87ea28 | 286 | kfree(idata); |
aea253ec | 287 | out: |
cb87ea28 | 288 | return ERR_PTR(err); |
cb87ea28 JC |
289 | } |
290 | ||
291 | static int mmc_blk_ioctl_cmd(struct block_device *bdev, | |
292 | struct mmc_ioc_cmd __user *ic_ptr) | |
293 | { | |
294 | struct mmc_blk_ioc_data *idata; | |
295 | struct mmc_blk_data *md; | |
296 | struct mmc_card *card; | |
297 | struct mmc_command cmd = {0}; | |
298 | struct mmc_data data = {0}; | |
ad5fd972 | 299 | struct mmc_request mrq = {NULL}; |
cb87ea28 JC |
300 | struct scatterlist sg; |
301 | int err; | |
302 | ||
303 | /* | |
304 | * The caller must have CAP_SYS_RAWIO, and must be calling this on the | |
305 | * whole block device, not on a partition. This prevents overspray | |
306 | * between sibling partitions. | |
307 | */ | |
308 | if ((!capable(CAP_SYS_RAWIO)) || (bdev != bdev->bd_contains)) | |
309 | return -EPERM; | |
310 | ||
311 | idata = mmc_blk_ioctl_copy_from_user(ic_ptr); | |
312 | if (IS_ERR(idata)) | |
313 | return PTR_ERR(idata); | |
314 | ||
315 | cmd.opcode = idata->ic.opcode; | |
316 | cmd.arg = idata->ic.arg; | |
317 | cmd.flags = idata->ic.flags; | |
318 | ||
319 | data.sg = &sg; | |
320 | data.sg_len = 1; | |
321 | data.blksz = idata->ic.blksz; | |
322 | data.blocks = idata->ic.blocks; | |
323 | ||
324 | sg_init_one(data.sg, idata->buf, idata->buf_bytes); | |
325 | ||
326 | if (idata->ic.write_flag) | |
327 | data.flags = MMC_DATA_WRITE; | |
328 | else | |
329 | data.flags = MMC_DATA_READ; | |
330 | ||
331 | mrq.cmd = &cmd; | |
332 | mrq.data = &data; | |
333 | ||
334 | md = mmc_blk_get(bdev->bd_disk); | |
335 | if (!md) { | |
336 | err = -EINVAL; | |
337 | goto cmd_done; | |
338 | } | |
339 | ||
340 | card = md->queue.card; | |
341 | if (IS_ERR(card)) { | |
342 | err = PTR_ERR(card); | |
343 | goto cmd_done; | |
344 | } | |
345 | ||
346 | mmc_claim_host(card->host); | |
347 | ||
348 | if (idata->ic.is_acmd) { | |
349 | err = mmc_app_cmd(card->host, card); | |
350 | if (err) | |
351 | goto cmd_rel_host; | |
352 | } | |
353 | ||
354 | /* data.flags must already be set before doing this. */ | |
355 | mmc_set_data_timeout(&data, card); | |
356 | /* Allow overriding the timeout_ns for empirical tuning. */ | |
357 | if (idata->ic.data_timeout_ns) | |
358 | data.timeout_ns = idata->ic.data_timeout_ns; | |
359 | ||
360 | if ((cmd.flags & MMC_RSP_R1B) == MMC_RSP_R1B) { | |
361 | /* | |
362 | * Pretend this is a data transfer and rely on the host driver | |
363 | * to compute timeout. When all host drivers support | |
364 | * cmd.cmd_timeout for R1B, this can be changed to: | |
365 | * | |
366 | * mrq.data = NULL; | |
367 | * cmd.cmd_timeout = idata->ic.cmd_timeout_ms; | |
368 | */ | |
369 | data.timeout_ns = idata->ic.cmd_timeout_ms * 1000000; | |
370 | } | |
371 | ||
372 | mmc_wait_for_req(card->host, &mrq); | |
373 | ||
374 | if (cmd.error) { | |
375 | dev_err(mmc_dev(card->host), "%s: cmd error %d\n", | |
376 | __func__, cmd.error); | |
377 | err = cmd.error; | |
378 | goto cmd_rel_host; | |
379 | } | |
380 | if (data.error) { | |
381 | dev_err(mmc_dev(card->host), "%s: data error %d\n", | |
382 | __func__, data.error); | |
383 | err = data.error; | |
384 | goto cmd_rel_host; | |
385 | } | |
386 | ||
387 | /* | |
388 | * According to the SD specs, some commands require a delay after | |
389 | * issuing the command. | |
390 | */ | |
391 | if (idata->ic.postsleep_min_us) | |
392 | usleep_range(idata->ic.postsleep_min_us, idata->ic.postsleep_max_us); | |
393 | ||
394 | if (copy_to_user(&(ic_ptr->response), cmd.resp, sizeof(cmd.resp))) { | |
395 | err = -EFAULT; | |
396 | goto cmd_rel_host; | |
397 | } | |
398 | ||
399 | if (!idata->ic.write_flag) { | |
400 | if (copy_to_user((void __user *)(unsigned long) idata->ic.data_ptr, | |
401 | idata->buf, idata->buf_bytes)) { | |
402 | err = -EFAULT; | |
403 | goto cmd_rel_host; | |
404 | } | |
405 | } | |
406 | ||
407 | cmd_rel_host: | |
408 | mmc_release_host(card->host); | |
409 | ||
410 | cmd_done: | |
411 | mmc_blk_put(md); | |
412 | kfree(idata->buf); | |
413 | kfree(idata); | |
414 | return err; | |
415 | } | |
416 | ||
417 | static int mmc_blk_ioctl(struct block_device *bdev, fmode_t mode, | |
418 | unsigned int cmd, unsigned long arg) | |
419 | { | |
420 | int ret = -EINVAL; | |
421 | if (cmd == MMC_IOC_CMD) | |
422 | ret = mmc_blk_ioctl_cmd(bdev, (struct mmc_ioc_cmd __user *)arg); | |
423 | return ret; | |
424 | } | |
425 | ||
426 | #ifdef CONFIG_COMPAT | |
427 | static int mmc_blk_compat_ioctl(struct block_device *bdev, fmode_t mode, | |
428 | unsigned int cmd, unsigned long arg) | |
429 | { | |
430 | return mmc_blk_ioctl(bdev, mode, cmd, (unsigned long) compat_ptr(arg)); | |
431 | } | |
432 | #endif | |
433 | ||
83d5cde4 | 434 | static const struct block_device_operations mmc_bdops = { |
a5a1561f AV |
435 | .open = mmc_blk_open, |
436 | .release = mmc_blk_release, | |
a885c8c4 | 437 | .getgeo = mmc_blk_getgeo, |
1da177e4 | 438 | .owner = THIS_MODULE, |
cb87ea28 JC |
439 | .ioctl = mmc_blk_ioctl, |
440 | #ifdef CONFIG_COMPAT | |
441 | .compat_ioctl = mmc_blk_compat_ioctl, | |
442 | #endif | |
1da177e4 LT |
443 | }; |
444 | ||
371a689f AW |
445 | static inline int mmc_blk_part_switch(struct mmc_card *card, |
446 | struct mmc_blk_data *md) | |
447 | { | |
448 | int ret; | |
449 | struct mmc_blk_data *main_md = mmc_get_drvdata(card); | |
0d7d85ca | 450 | |
371a689f AW |
451 | if (main_md->part_curr == md->part_type) |
452 | return 0; | |
453 | ||
454 | if (mmc_card_mmc(card)) { | |
0d7d85ca AH |
455 | u8 part_config = card->ext_csd.part_config; |
456 | ||
457 | part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK; | |
458 | part_config |= md->part_type; | |
371a689f AW |
459 | |
460 | ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
0d7d85ca | 461 | EXT_CSD_PART_CONFIG, part_config, |
371a689f AW |
462 | card->ext_csd.part_time); |
463 | if (ret) | |
464 | return ret; | |
0d7d85ca AH |
465 | |
466 | card->ext_csd.part_config = part_config; | |
67716327 | 467 | } |
371a689f AW |
468 | |
469 | main_md->part_curr = md->part_type; | |
470 | return 0; | |
471 | } | |
472 | ||
ec5a19dd PO |
473 | static u32 mmc_sd_num_wr_blocks(struct mmc_card *card) |
474 | { | |
475 | int err; | |
051913da BD |
476 | u32 result; |
477 | __be32 *blocks; | |
ec5a19dd | 478 | |
ad5fd972 | 479 | struct mmc_request mrq = {NULL}; |
1278dba1 | 480 | struct mmc_command cmd = {0}; |
a61ad2b4 | 481 | struct mmc_data data = {0}; |
ec5a19dd PO |
482 | unsigned int timeout_us; |
483 | ||
484 | struct scatterlist sg; | |
485 | ||
ec5a19dd PO |
486 | cmd.opcode = MMC_APP_CMD; |
487 | cmd.arg = card->rca << 16; | |
7213d175 | 488 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; |
ec5a19dd PO |
489 | |
490 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
7213d175 DB |
491 | if (err) |
492 | return (u32)-1; | |
493 | if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD)) | |
ec5a19dd PO |
494 | return (u32)-1; |
495 | ||
496 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
497 | ||
498 | cmd.opcode = SD_APP_SEND_NUM_WR_BLKS; | |
499 | cmd.arg = 0; | |
7213d175 | 500 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; |
ec5a19dd | 501 | |
ec5a19dd PO |
502 | data.timeout_ns = card->csd.tacc_ns * 100; |
503 | data.timeout_clks = card->csd.tacc_clks * 100; | |
504 | ||
505 | timeout_us = data.timeout_ns / 1000; | |
506 | timeout_us += data.timeout_clks * 1000 / | |
507 | (card->host->ios.clock / 1000); | |
508 | ||
509 | if (timeout_us > 100000) { | |
510 | data.timeout_ns = 100000000; | |
511 | data.timeout_clks = 0; | |
512 | } | |
513 | ||
514 | data.blksz = 4; | |
515 | data.blocks = 1; | |
516 | data.flags = MMC_DATA_READ; | |
517 | data.sg = &sg; | |
518 | data.sg_len = 1; | |
519 | ||
ec5a19dd PO |
520 | mrq.cmd = &cmd; |
521 | mrq.data = &data; | |
522 | ||
051913da BD |
523 | blocks = kmalloc(4, GFP_KERNEL); |
524 | if (!blocks) | |
525 | return (u32)-1; | |
526 | ||
527 | sg_init_one(&sg, blocks, 4); | |
ec5a19dd PO |
528 | |
529 | mmc_wait_for_req(card->host, &mrq); | |
530 | ||
051913da BD |
531 | result = ntohl(*blocks); |
532 | kfree(blocks); | |
533 | ||
17b0429d | 534 | if (cmd.error || data.error) |
051913da | 535 | result = (u32)-1; |
ec5a19dd | 536 | |
051913da | 537 | return result; |
ec5a19dd PO |
538 | } |
539 | ||
a01f3ccf RKAL |
540 | static int send_stop(struct mmc_card *card, u32 *status) |
541 | { | |
542 | struct mmc_command cmd = {0}; | |
543 | int err; | |
544 | ||
545 | cmd.opcode = MMC_STOP_TRANSMISSION; | |
546 | cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; | |
547 | err = mmc_wait_for_cmd(card->host, &cmd, 5); | |
548 | if (err == 0) | |
549 | *status = cmd.resp[0]; | |
550 | return err; | |
551 | } | |
552 | ||
0a2d4048 | 553 | static int get_card_status(struct mmc_card *card, u32 *status, int retries) |
504f191f | 554 | { |
1278dba1 | 555 | struct mmc_command cmd = {0}; |
504f191f AH |
556 | int err; |
557 | ||
504f191f AH |
558 | cmd.opcode = MMC_SEND_STATUS; |
559 | if (!mmc_host_is_spi(card->host)) | |
560 | cmd.arg = card->rca << 16; | |
561 | cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC; | |
0a2d4048 RKAL |
562 | err = mmc_wait_for_cmd(card->host, &cmd, retries); |
563 | if (err == 0) | |
564 | *status = cmd.resp[0]; | |
565 | return err; | |
504f191f AH |
566 | } |
567 | ||
a01f3ccf RKAL |
568 | #define ERR_RETRY 2 |
569 | #define ERR_ABORT 1 | |
570 | #define ERR_CONTINUE 0 | |
571 | ||
572 | static int mmc_blk_cmd_error(struct request *req, const char *name, int error, | |
573 | bool status_valid, u32 status) | |
574 | { | |
575 | switch (error) { | |
576 | case -EILSEQ: | |
577 | /* response crc error, retry the r/w cmd */ | |
578 | pr_err("%s: %s sending %s command, card status %#x\n", | |
579 | req->rq_disk->disk_name, "response CRC error", | |
580 | name, status); | |
581 | return ERR_RETRY; | |
582 | ||
583 | case -ETIMEDOUT: | |
584 | pr_err("%s: %s sending %s command, card status %#x\n", | |
585 | req->rq_disk->disk_name, "timed out", name, status); | |
586 | ||
587 | /* If the status cmd initially failed, retry the r/w cmd */ | |
588 | if (!status_valid) | |
589 | return ERR_RETRY; | |
590 | ||
591 | /* | |
592 | * If it was a r/w cmd crc error, or illegal command | |
593 | * (eg, issued in wrong state) then retry - we should | |
594 | * have corrected the state problem above. | |
595 | */ | |
596 | if (status & (R1_COM_CRC_ERROR | R1_ILLEGAL_COMMAND)) | |
597 | return ERR_RETRY; | |
598 | ||
599 | /* Otherwise abort the command */ | |
600 | return ERR_ABORT; | |
601 | ||
602 | default: | |
603 | /* We don't understand the error code the driver gave us */ | |
604 | pr_err("%s: unknown error %d sending read/write command, card status %#x\n", | |
605 | req->rq_disk->disk_name, error, status); | |
606 | return ERR_ABORT; | |
607 | } | |
608 | } | |
609 | ||
610 | /* | |
611 | * Initial r/w and stop cmd error recovery. | |
612 | * We don't know whether the card received the r/w cmd or not, so try to | |
613 | * restore things back to a sane state. Essentially, we do this as follows: | |
614 | * - Obtain card status. If the first attempt to obtain card status fails, | |
615 | * the status word will reflect the failed status cmd, not the failed | |
616 | * r/w cmd. If we fail to obtain card status, it suggests we can no | |
617 | * longer communicate with the card. | |
618 | * - Check the card state. If the card received the cmd but there was a | |
619 | * transient problem with the response, it might still be in a data transfer | |
620 | * mode. Try to send it a stop command. If this fails, we can't recover. | |
621 | * - If the r/w cmd failed due to a response CRC error, it was probably | |
622 | * transient, so retry the cmd. | |
623 | * - If the r/w cmd timed out, but we didn't get the r/w cmd status, retry. | |
624 | * - If the r/w cmd timed out, and the r/w cmd failed due to CRC error or | |
625 | * illegal cmd, retry. | |
626 | * Otherwise we don't understand what happened, so abort. | |
627 | */ | |
628 | static int mmc_blk_cmd_recovery(struct mmc_card *card, struct request *req, | |
67716327 | 629 | struct mmc_blk_request *brq, int *ecc_err) |
a01f3ccf RKAL |
630 | { |
631 | bool prev_cmd_status_valid = true; | |
632 | u32 status, stop_status = 0; | |
633 | int err, retry; | |
634 | ||
635 | /* | |
636 | * Try to get card status which indicates both the card state | |
637 | * and why there was no response. If the first attempt fails, | |
638 | * we can't be sure the returned status is for the r/w command. | |
639 | */ | |
640 | for (retry = 2; retry >= 0; retry--) { | |
641 | err = get_card_status(card, &status, 0); | |
642 | if (!err) | |
643 | break; | |
644 | ||
645 | prev_cmd_status_valid = false; | |
646 | pr_err("%s: error %d sending status command, %sing\n", | |
647 | req->rq_disk->disk_name, err, retry ? "retry" : "abort"); | |
648 | } | |
649 | ||
650 | /* We couldn't get a response from the card. Give up. */ | |
651 | if (err) | |
652 | return ERR_ABORT; | |
653 | ||
67716327 AH |
654 | /* Flag ECC errors */ |
655 | if ((status & R1_CARD_ECC_FAILED) || | |
656 | (brq->stop.resp[0] & R1_CARD_ECC_FAILED) || | |
657 | (brq->cmd.resp[0] & R1_CARD_ECC_FAILED)) | |
658 | *ecc_err = 1; | |
659 | ||
a01f3ccf RKAL |
660 | /* |
661 | * Check the current card state. If it is in some data transfer | |
662 | * mode, tell it to stop (and hopefully transition back to TRAN.) | |
663 | */ | |
664 | if (R1_CURRENT_STATE(status) == R1_STATE_DATA || | |
665 | R1_CURRENT_STATE(status) == R1_STATE_RCV) { | |
666 | err = send_stop(card, &stop_status); | |
667 | if (err) | |
668 | pr_err("%s: error %d sending stop command\n", | |
669 | req->rq_disk->disk_name, err); | |
670 | ||
671 | /* | |
672 | * If the stop cmd also timed out, the card is probably | |
673 | * not present, so abort. Other errors are bad news too. | |
674 | */ | |
675 | if (err) | |
676 | return ERR_ABORT; | |
67716327 AH |
677 | if (stop_status & R1_CARD_ECC_FAILED) |
678 | *ecc_err = 1; | |
a01f3ccf RKAL |
679 | } |
680 | ||
681 | /* Check for set block count errors */ | |
682 | if (brq->sbc.error) | |
683 | return mmc_blk_cmd_error(req, "SET_BLOCK_COUNT", brq->sbc.error, | |
684 | prev_cmd_status_valid, status); | |
685 | ||
686 | /* Check for r/w command errors */ | |
687 | if (brq->cmd.error) | |
688 | return mmc_blk_cmd_error(req, "r/w cmd", brq->cmd.error, | |
689 | prev_cmd_status_valid, status); | |
690 | ||
67716327 AH |
691 | /* Data errors */ |
692 | if (!brq->stop.error) | |
693 | return ERR_CONTINUE; | |
694 | ||
a01f3ccf RKAL |
695 | /* Now for stop errors. These aren't fatal to the transfer. */ |
696 | pr_err("%s: error %d sending stop command, original cmd response %#x, card status %#x\n", | |
697 | req->rq_disk->disk_name, brq->stop.error, | |
698 | brq->cmd.resp[0], status); | |
699 | ||
700 | /* | |
701 | * Subsitute in our own stop status as this will give the error | |
702 | * state which happened during the execution of the r/w command. | |
703 | */ | |
704 | if (stop_status) { | |
705 | brq->stop.resp[0] = stop_status; | |
706 | brq->stop.error = 0; | |
707 | } | |
708 | return ERR_CONTINUE; | |
709 | } | |
710 | ||
67716327 AH |
711 | static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host, |
712 | int type) | |
713 | { | |
714 | int err; | |
715 | ||
716 | if (md->reset_done & type) | |
717 | return -EEXIST; | |
718 | ||
719 | md->reset_done |= type; | |
720 | err = mmc_hw_reset(host); | |
721 | /* Ensure we switch back to the correct partition */ | |
722 | if (err != -EOPNOTSUPP) { | |
723 | struct mmc_blk_data *main_md = mmc_get_drvdata(host->card); | |
724 | int part_err; | |
725 | ||
726 | main_md->part_curr = main_md->part_type; | |
727 | part_err = mmc_blk_part_switch(host->card, md); | |
728 | if (part_err) { | |
729 | /* | |
730 | * We have failed to get back into the correct | |
731 | * partition, so we need to abort the whole request. | |
732 | */ | |
733 | return -ENODEV; | |
734 | } | |
735 | } | |
736 | return err; | |
737 | } | |
738 | ||
739 | static inline void mmc_blk_reset_success(struct mmc_blk_data *md, int type) | |
740 | { | |
741 | md->reset_done &= ~type; | |
742 | } | |
743 | ||
bd788c96 AH |
744 | static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req) |
745 | { | |
746 | struct mmc_blk_data *md = mq->data; | |
747 | struct mmc_card *card = md->queue.card; | |
748 | unsigned int from, nr, arg; | |
67716327 | 749 | int err = 0, type = MMC_BLK_DISCARD; |
bd788c96 | 750 | |
bd788c96 AH |
751 | if (!mmc_can_erase(card)) { |
752 | err = -EOPNOTSUPP; | |
753 | goto out; | |
754 | } | |
755 | ||
756 | from = blk_rq_pos(req); | |
757 | nr = blk_rq_sectors(req); | |
758 | ||
759 | if (mmc_can_trim(card)) | |
760 | arg = MMC_TRIM_ARG; | |
761 | else | |
762 | arg = MMC_ERASE_ARG; | |
67716327 | 763 | retry: |
6a7a6b45 AW |
764 | if (card->quirks & MMC_QUIRK_INAND_CMD38) { |
765 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
766 | INAND_CMD38_ARG_EXT_CSD, | |
767 | arg == MMC_TRIM_ARG ? | |
768 | INAND_CMD38_ARG_TRIM : | |
769 | INAND_CMD38_ARG_ERASE, | |
770 | 0); | |
771 | if (err) | |
772 | goto out; | |
773 | } | |
bd788c96 AH |
774 | err = mmc_erase(card, from, nr, arg); |
775 | out: | |
67716327 AH |
776 | if (err == -EIO && !mmc_blk_reset(md, card->host, type)) |
777 | goto retry; | |
778 | if (!err) | |
779 | mmc_blk_reset_success(md, type); | |
bd788c96 AH |
780 | spin_lock_irq(&md->lock); |
781 | __blk_end_request(req, err, blk_rq_bytes(req)); | |
782 | spin_unlock_irq(&md->lock); | |
783 | ||
bd788c96 AH |
784 | return err ? 0 : 1; |
785 | } | |
786 | ||
49804548 AH |
787 | static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq, |
788 | struct request *req) | |
789 | { | |
790 | struct mmc_blk_data *md = mq->data; | |
791 | struct mmc_card *card = md->queue.card; | |
792 | unsigned int from, nr, arg; | |
67716327 | 793 | int err = 0, type = MMC_BLK_SECDISCARD; |
49804548 | 794 | |
49804548 AH |
795 | if (!mmc_can_secure_erase_trim(card)) { |
796 | err = -EOPNOTSUPP; | |
797 | goto out; | |
798 | } | |
799 | ||
800 | from = blk_rq_pos(req); | |
801 | nr = blk_rq_sectors(req); | |
802 | ||
803 | if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr)) | |
804 | arg = MMC_SECURE_TRIM1_ARG; | |
805 | else | |
806 | arg = MMC_SECURE_ERASE_ARG; | |
67716327 | 807 | retry: |
6a7a6b45 AW |
808 | if (card->quirks & MMC_QUIRK_INAND_CMD38) { |
809 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
810 | INAND_CMD38_ARG_EXT_CSD, | |
811 | arg == MMC_SECURE_TRIM1_ARG ? | |
812 | INAND_CMD38_ARG_SECTRIM1 : | |
813 | INAND_CMD38_ARG_SECERASE, | |
814 | 0); | |
815 | if (err) | |
816 | goto out; | |
817 | } | |
49804548 | 818 | err = mmc_erase(card, from, nr, arg); |
6a7a6b45 AW |
819 | if (!err && arg == MMC_SECURE_TRIM1_ARG) { |
820 | if (card->quirks & MMC_QUIRK_INAND_CMD38) { | |
821 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
822 | INAND_CMD38_ARG_EXT_CSD, | |
823 | INAND_CMD38_ARG_SECTRIM2, | |
824 | 0); | |
825 | if (err) | |
826 | goto out; | |
827 | } | |
49804548 | 828 | err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG); |
6a7a6b45 | 829 | } |
49804548 | 830 | out: |
67716327 AH |
831 | if (err == -EIO && !mmc_blk_reset(md, card->host, type)) |
832 | goto retry; | |
833 | if (!err) | |
834 | mmc_blk_reset_success(md, type); | |
49804548 AH |
835 | spin_lock_irq(&md->lock); |
836 | __blk_end_request(req, err, blk_rq_bytes(req)); | |
837 | spin_unlock_irq(&md->lock); | |
838 | ||
49804548 AH |
839 | return err ? 0 : 1; |
840 | } | |
841 | ||
f4c5522b AW |
842 | static int mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req) |
843 | { | |
844 | struct mmc_blk_data *md = mq->data; | |
845 | ||
846 | /* | |
847 | * No-op, only service this because we need REQ_FUA for reliable | |
848 | * writes. | |
849 | */ | |
850 | spin_lock_irq(&md->lock); | |
851 | __blk_end_request_all(req, 0); | |
852 | spin_unlock_irq(&md->lock); | |
853 | ||
854 | return 1; | |
855 | } | |
856 | ||
857 | /* | |
858 | * Reformat current write as a reliable write, supporting | |
859 | * both legacy and the enhanced reliable write MMC cards. | |
860 | * In each transfer we'll handle only as much as a single | |
861 | * reliable write can handle, thus finish the request in | |
862 | * partial completions. | |
863 | */ | |
d0c97cfb AW |
864 | static inline void mmc_apply_rel_rw(struct mmc_blk_request *brq, |
865 | struct mmc_card *card, | |
866 | struct request *req) | |
f4c5522b | 867 | { |
f4c5522b AW |
868 | if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) { |
869 | /* Legacy mode imposes restrictions on transfers. */ | |
870 | if (!IS_ALIGNED(brq->cmd.arg, card->ext_csd.rel_sectors)) | |
871 | brq->data.blocks = 1; | |
872 | ||
873 | if (brq->data.blocks > card->ext_csd.rel_sectors) | |
874 | brq->data.blocks = card->ext_csd.rel_sectors; | |
875 | else if (brq->data.blocks < card->ext_csd.rel_sectors) | |
876 | brq->data.blocks = 1; | |
877 | } | |
f4c5522b AW |
878 | } |
879 | ||
4c2b8f26 RKAL |
880 | #define CMD_ERRORS \ |
881 | (R1_OUT_OF_RANGE | /* Command argument out of range */ \ | |
882 | R1_ADDRESS_ERROR | /* Misaligned address */ \ | |
883 | R1_BLOCK_LEN_ERROR | /* Transferred block length incorrect */\ | |
884 | R1_WP_VIOLATION | /* Tried to write to protected block */ \ | |
885 | R1_CC_ERROR | /* Card controller error */ \ | |
886 | R1_ERROR) /* General/unknown error */ | |
887 | ||
ee8a43a5 PF |
888 | static int mmc_blk_err_check(struct mmc_card *card, |
889 | struct mmc_async_req *areq) | |
d78d4a8a | 890 | { |
ee8a43a5 PF |
891 | struct mmc_queue_req *mq_mrq = container_of(areq, struct mmc_queue_req, |
892 | mmc_active); | |
893 | struct mmc_blk_request *brq = &mq_mrq->brq; | |
894 | struct request *req = mq_mrq->req; | |
67716327 | 895 | int ecc_err = 0; |
d78d4a8a PF |
896 | |
897 | /* | |
898 | * sbc.error indicates a problem with the set block count | |
899 | * command. No data will have been transferred. | |
900 | * | |
901 | * cmd.error indicates a problem with the r/w command. No | |
902 | * data will have been transferred. | |
903 | * | |
904 | * stop.error indicates a problem with the stop command. Data | |
905 | * may have been transferred, or may still be transferring. | |
906 | */ | |
67716327 AH |
907 | if (brq->sbc.error || brq->cmd.error || brq->stop.error || |
908 | brq->data.error) { | |
909 | switch (mmc_blk_cmd_recovery(card, req, brq, &ecc_err)) { | |
d78d4a8a PF |
910 | case ERR_RETRY: |
911 | return MMC_BLK_RETRY; | |
912 | case ERR_ABORT: | |
913 | return MMC_BLK_ABORT; | |
914 | case ERR_CONTINUE: | |
915 | break; | |
916 | } | |
917 | } | |
918 | ||
919 | /* | |
920 | * Check for errors relating to the execution of the | |
921 | * initial command - such as address errors. No data | |
922 | * has been transferred. | |
923 | */ | |
924 | if (brq->cmd.resp[0] & CMD_ERRORS) { | |
925 | pr_err("%s: r/w command failed, status = %#x\n", | |
926 | req->rq_disk->disk_name, brq->cmd.resp[0]); | |
927 | return MMC_BLK_ABORT; | |
928 | } | |
929 | ||
930 | /* | |
931 | * Everything else is either success, or a data error of some | |
932 | * kind. If it was a write, we may have transitioned to | |
933 | * program mode, which we have to wait for it to complete. | |
934 | */ | |
935 | if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) { | |
936 | u32 status; | |
937 | do { | |
938 | int err = get_card_status(card, &status, 5); | |
939 | if (err) { | |
940 | printk(KERN_ERR "%s: error %d requesting status\n", | |
941 | req->rq_disk->disk_name, err); | |
942 | return MMC_BLK_CMD_ERR; | |
943 | } | |
944 | /* | |
945 | * Some cards mishandle the status bits, | |
946 | * so make sure to check both the busy | |
947 | * indication and the card state. | |
948 | */ | |
949 | } while (!(status & R1_READY_FOR_DATA) || | |
950 | (R1_CURRENT_STATE(status) == R1_STATE_PRG)); | |
951 | } | |
952 | ||
953 | if (brq->data.error) { | |
954 | pr_err("%s: error %d transferring data, sector %u, nr %u, cmd response %#x, card status %#x\n", | |
955 | req->rq_disk->disk_name, brq->data.error, | |
956 | (unsigned)blk_rq_pos(req), | |
957 | (unsigned)blk_rq_sectors(req), | |
958 | brq->cmd.resp[0], brq->stop.resp[0]); | |
959 | ||
960 | if (rq_data_dir(req) == READ) { | |
67716327 AH |
961 | if (ecc_err) |
962 | return MMC_BLK_ECC_ERR; | |
d78d4a8a PF |
963 | return MMC_BLK_DATA_ERR; |
964 | } else { | |
965 | return MMC_BLK_CMD_ERR; | |
966 | } | |
967 | } | |
968 | ||
67716327 AH |
969 | if (!brq->data.bytes_xfered) |
970 | return MMC_BLK_RETRY; | |
d78d4a8a | 971 | |
67716327 AH |
972 | if (blk_rq_bytes(req) != brq->data.bytes_xfered) |
973 | return MMC_BLK_PARTIAL; | |
974 | ||
975 | return MMC_BLK_SUCCESS; | |
d78d4a8a PF |
976 | } |
977 | ||
54d49d77 PF |
978 | static void mmc_blk_rw_rq_prep(struct mmc_queue_req *mqrq, |
979 | struct mmc_card *card, | |
980 | int disable_multi, | |
981 | struct mmc_queue *mq) | |
1da177e4 | 982 | { |
54d49d77 PF |
983 | u32 readcmd, writecmd; |
984 | struct mmc_blk_request *brq = &mqrq->brq; | |
985 | struct request *req = mqrq->req; | |
1da177e4 | 986 | struct mmc_blk_data *md = mq->data; |
1da177e4 | 987 | |
f4c5522b AW |
988 | /* |
989 | * Reliable writes are used to implement Forced Unit Access and | |
990 | * REQ_META accesses, and are supported only on MMCs. | |
65299a3b CH |
991 | * |
992 | * XXX: this really needs a good explanation of why REQ_META | |
993 | * is treated special. | |
f4c5522b AW |
994 | */ |
995 | bool do_rel_wr = ((req->cmd_flags & REQ_FUA) || | |
996 | (req->cmd_flags & REQ_META)) && | |
997 | (rq_data_dir(req) == WRITE) && | |
d0c97cfb | 998 | (md->flags & MMC_BLK_REL_WR); |
f4c5522b | 999 | |
54d49d77 PF |
1000 | memset(brq, 0, sizeof(struct mmc_blk_request)); |
1001 | brq->mrq.cmd = &brq->cmd; | |
1002 | brq->mrq.data = &brq->data; | |
1da177e4 | 1003 | |
54d49d77 PF |
1004 | brq->cmd.arg = blk_rq_pos(req); |
1005 | if (!mmc_card_blockaddr(card)) | |
1006 | brq->cmd.arg <<= 9; | |
1007 | brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; | |
1008 | brq->data.blksz = 512; | |
1009 | brq->stop.opcode = MMC_STOP_TRANSMISSION; | |
1010 | brq->stop.arg = 0; | |
1011 | brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; | |
1012 | brq->data.blocks = blk_rq_sectors(req); | |
6a79e391 | 1013 | |
54d49d77 PF |
1014 | /* |
1015 | * The block layer doesn't support all sector count | |
1016 | * restrictions, so we need to be prepared for too big | |
1017 | * requests. | |
1018 | */ | |
1019 | if (brq->data.blocks > card->host->max_blk_count) | |
1020 | brq->data.blocks = card->host->max_blk_count; | |
1da177e4 | 1021 | |
54d49d77 PF |
1022 | /* |
1023 | * After a read error, we redo the request one sector at a time | |
1024 | * in order to accurately determine which sectors can be read | |
1025 | * successfully. | |
1026 | */ | |
1027 | if (disable_multi && brq->data.blocks > 1) | |
1028 | brq->data.blocks = 1; | |
d0c97cfb | 1029 | |
54d49d77 PF |
1030 | if (brq->data.blocks > 1 || do_rel_wr) { |
1031 | /* SPI multiblock writes terminate using a special | |
1032 | * token, not a STOP_TRANSMISSION request. | |
d0c97cfb | 1033 | */ |
54d49d77 PF |
1034 | if (!mmc_host_is_spi(card->host) || |
1035 | rq_data_dir(req) == READ) | |
1036 | brq->mrq.stop = &brq->stop; | |
1037 | readcmd = MMC_READ_MULTIPLE_BLOCK; | |
1038 | writecmd = MMC_WRITE_MULTIPLE_BLOCK; | |
1039 | } else { | |
1040 | brq->mrq.stop = NULL; | |
1041 | readcmd = MMC_READ_SINGLE_BLOCK; | |
1042 | writecmd = MMC_WRITE_BLOCK; | |
1043 | } | |
1044 | if (rq_data_dir(req) == READ) { | |
1045 | brq->cmd.opcode = readcmd; | |
1046 | brq->data.flags |= MMC_DATA_READ; | |
1047 | } else { | |
1048 | brq->cmd.opcode = writecmd; | |
1049 | brq->data.flags |= MMC_DATA_WRITE; | |
1050 | } | |
d0c97cfb | 1051 | |
54d49d77 PF |
1052 | if (do_rel_wr) |
1053 | mmc_apply_rel_rw(brq, card, req); | |
f4c5522b | 1054 | |
54d49d77 PF |
1055 | /* |
1056 | * Pre-defined multi-block transfers are preferable to | |
1057 | * open ended-ones (and necessary for reliable writes). | |
1058 | * However, it is not sufficient to just send CMD23, | |
1059 | * and avoid the final CMD12, as on an error condition | |
1060 | * CMD12 (stop) needs to be sent anyway. This, coupled | |
1061 | * with Auto-CMD23 enhancements provided by some | |
1062 | * hosts, means that the complexity of dealing | |
1063 | * with this is best left to the host. If CMD23 is | |
1064 | * supported by card and host, we'll fill sbc in and let | |
1065 | * the host deal with handling it correctly. This means | |
1066 | * that for hosts that don't expose MMC_CAP_CMD23, no | |
1067 | * change of behavior will be observed. | |
1068 | * | |
1069 | * N.B: Some MMC cards experience perf degradation. | |
1070 | * We'll avoid using CMD23-bounded multiblock writes for | |
1071 | * these, while retaining features like reliable writes. | |
1072 | */ | |
b146d26a | 1073 | |
54d49d77 PF |
1074 | if ((md->flags & MMC_BLK_CMD23) && |
1075 | mmc_op_multi(brq->cmd.opcode) && | |
1076 | (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23))) { | |
1077 | brq->sbc.opcode = MMC_SET_BLOCK_COUNT; | |
1078 | brq->sbc.arg = brq->data.blocks | | |
1079 | (do_rel_wr ? (1 << 31) : 0); | |
1080 | brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC; | |
1081 | brq->mrq.sbc = &brq->sbc; | |
1082 | } | |
98ccf149 | 1083 | |
54d49d77 PF |
1084 | mmc_set_data_timeout(&brq->data, card); |
1085 | ||
1086 | brq->data.sg = mqrq->sg; | |
1087 | brq->data.sg_len = mmc_queue_map_sg(mq, mqrq); | |
1088 | ||
1089 | /* | |
1090 | * Adjust the sg list so it is the same size as the | |
1091 | * request. | |
1092 | */ | |
1093 | if (brq->data.blocks != blk_rq_sectors(req)) { | |
1094 | int i, data_size = brq->data.blocks << 9; | |
1095 | struct scatterlist *sg; | |
1096 | ||
1097 | for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) { | |
1098 | data_size -= sg->length; | |
1099 | if (data_size <= 0) { | |
1100 | sg->length += data_size; | |
1101 | i++; | |
1102 | break; | |
6a79e391 | 1103 | } |
6a79e391 | 1104 | } |
54d49d77 PF |
1105 | brq->data.sg_len = i; |
1106 | } | |
1107 | ||
ee8a43a5 PF |
1108 | mqrq->mmc_active.mrq = &brq->mrq; |
1109 | mqrq->mmc_active.err_check = mmc_blk_err_check; | |
1110 | ||
54d49d77 PF |
1111 | mmc_queue_bounce_pre(mqrq); |
1112 | } | |
6a79e391 | 1113 | |
67716327 AH |
1114 | static int mmc_blk_cmd_err(struct mmc_blk_data *md, struct mmc_card *card, |
1115 | struct mmc_blk_request *brq, struct request *req, | |
1116 | int ret) | |
1117 | { | |
1118 | /* | |
1119 | * If this is an SD card and we're writing, we can first | |
1120 | * mark the known good sectors as ok. | |
1121 | * | |
1122 | * If the card is not SD, we can still ok written sectors | |
1123 | * as reported by the controller (which might be less than | |
1124 | * the real number of written sectors, but never more). | |
1125 | */ | |
1126 | if (mmc_card_sd(card)) { | |
1127 | u32 blocks; | |
1128 | ||
1129 | blocks = mmc_sd_num_wr_blocks(card); | |
1130 | if (blocks != (u32)-1) { | |
1131 | spin_lock_irq(&md->lock); | |
1132 | ret = __blk_end_request(req, 0, blocks << 9); | |
1133 | spin_unlock_irq(&md->lock); | |
1134 | } | |
1135 | } else { | |
1136 | spin_lock_irq(&md->lock); | |
1137 | ret = __blk_end_request(req, 0, brq->data.bytes_xfered); | |
1138 | spin_unlock_irq(&md->lock); | |
1139 | } | |
1140 | return ret; | |
1141 | } | |
1142 | ||
ee8a43a5 | 1143 | static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc) |
54d49d77 PF |
1144 | { |
1145 | struct mmc_blk_data *md = mq->data; | |
1146 | struct mmc_card *card = md->queue.card; | |
1147 | struct mmc_blk_request *brq = &mq->mqrq_cur->brq; | |
67716327 | 1148 | int ret = 1, disable_multi = 0, retry = 0, type; |
d78d4a8a | 1149 | enum mmc_blk_status status; |
ee8a43a5 PF |
1150 | struct mmc_queue_req *mq_rq; |
1151 | struct request *req; | |
1152 | struct mmc_async_req *areq; | |
1da177e4 | 1153 | |
ee8a43a5 PF |
1154 | if (!rqc && !mq->mqrq_prev->req) |
1155 | return 0; | |
98ccf149 | 1156 | |
ee8a43a5 PF |
1157 | do { |
1158 | if (rqc) { | |
1159 | mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq); | |
1160 | areq = &mq->mqrq_cur->mmc_active; | |
1161 | } else | |
1162 | areq = NULL; | |
1163 | areq = mmc_start_req(card->host, areq, (int *) &status); | |
1164 | if (!areq) | |
1165 | return 0; | |
1166 | ||
1167 | mq_rq = container_of(areq, struct mmc_queue_req, mmc_active); | |
1168 | brq = &mq_rq->brq; | |
1169 | req = mq_rq->req; | |
67716327 | 1170 | type = rq_data_dir(req) == READ ? MMC_BLK_READ : MMC_BLK_WRITE; |
ee8a43a5 | 1171 | mmc_queue_bounce_post(mq_rq); |
98ccf149 | 1172 | |
d78d4a8a PF |
1173 | switch (status) { |
1174 | case MMC_BLK_SUCCESS: | |
1175 | case MMC_BLK_PARTIAL: | |
1176 | /* | |
1177 | * A block was successfully transferred. | |
1178 | */ | |
67716327 | 1179 | mmc_blk_reset_success(md, type); |
d78d4a8a PF |
1180 | spin_lock_irq(&md->lock); |
1181 | ret = __blk_end_request(req, 0, | |
1182 | brq->data.bytes_xfered); | |
1183 | spin_unlock_irq(&md->lock); | |
67716327 AH |
1184 | /* |
1185 | * If the blk_end_request function returns non-zero even | |
1186 | * though all data has been transferred and no errors | |
1187 | * were returned by the host controller, it's a bug. | |
1188 | */ | |
ee8a43a5 | 1189 | if (status == MMC_BLK_SUCCESS && ret) { |
ee8a43a5 PF |
1190 | printk(KERN_ERR "%s BUG rq_tot %d d_xfer %d\n", |
1191 | __func__, blk_rq_bytes(req), | |
1192 | brq->data.bytes_xfered); | |
1193 | rqc = NULL; | |
1194 | goto cmd_abort; | |
1195 | } | |
d78d4a8a PF |
1196 | break; |
1197 | case MMC_BLK_CMD_ERR: | |
67716327 AH |
1198 | ret = mmc_blk_cmd_err(md, card, brq, req, ret); |
1199 | if (!mmc_blk_reset(md, card->host, type)) | |
1200 | break; | |
1201 | goto cmd_abort; | |
d78d4a8a PF |
1202 | case MMC_BLK_RETRY: |
1203 | if (retry++ < 5) | |
a01f3ccf | 1204 | break; |
67716327 | 1205 | /* Fall through */ |
d78d4a8a | 1206 | case MMC_BLK_ABORT: |
67716327 AH |
1207 | if (!mmc_blk_reset(md, card->host, type)) |
1208 | break; | |
4c2b8f26 | 1209 | goto cmd_abort; |
67716327 AH |
1210 | case MMC_BLK_DATA_ERR: { |
1211 | int err; | |
1212 | ||
1213 | err = mmc_blk_reset(md, card->host, type); | |
1214 | if (!err) | |
1215 | break; | |
1216 | if (err == -ENODEV) | |
1217 | goto cmd_abort; | |
1218 | /* Fall through */ | |
1219 | } | |
1220 | case MMC_BLK_ECC_ERR: | |
1221 | if (brq->data.blocks > 1) { | |
1222 | /* Redo read one sector at a time */ | |
1223 | pr_warning("%s: retrying using single block read\n", | |
1224 | req->rq_disk->disk_name); | |
1225 | disable_multi = 1; | |
1226 | break; | |
1227 | } | |
d78d4a8a PF |
1228 | /* |
1229 | * After an error, we redo I/O one sector at a | |
1230 | * time, so we only reach here after trying to | |
1231 | * read a single sector. | |
1232 | */ | |
1233 | spin_lock_irq(&md->lock); | |
1234 | ret = __blk_end_request(req, -EIO, | |
1235 | brq->data.blksz); | |
1236 | spin_unlock_irq(&md->lock); | |
ee8a43a5 PF |
1237 | if (!ret) |
1238 | goto start_new_req; | |
d78d4a8a | 1239 | break; |
4c2b8f26 RKAL |
1240 | } |
1241 | ||
ee8a43a5 PF |
1242 | if (ret) { |
1243 | /* | |
67716327 | 1244 | * In case of a incomplete request |
ee8a43a5 PF |
1245 | * prepare it again and resend. |
1246 | */ | |
1247 | mmc_blk_rw_rq_prep(mq_rq, card, disable_multi, mq); | |
1248 | mmc_start_req(card->host, &mq_rq->mmc_active, NULL); | |
1249 | } | |
1da177e4 LT |
1250 | } while (ret); |
1251 | ||
1da177e4 LT |
1252 | return 1; |
1253 | ||
a01f3ccf | 1254 | cmd_abort: |
1da177e4 | 1255 | spin_lock_irq(&md->lock); |
fd539832 KU |
1256 | while (ret) |
1257 | ret = __blk_end_request(req, -EIO, blk_rq_cur_bytes(req)); | |
1da177e4 LT |
1258 | spin_unlock_irq(&md->lock); |
1259 | ||
ee8a43a5 PF |
1260 | start_new_req: |
1261 | if (rqc) { | |
1262 | mmc_blk_rw_rq_prep(mq->mqrq_cur, card, 0, mq); | |
1263 | mmc_start_req(card->host, &mq->mqrq_cur->mmc_active, NULL); | |
1264 | } | |
1265 | ||
1da177e4 LT |
1266 | return 0; |
1267 | } | |
1268 | ||
bd788c96 AH |
1269 | static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) |
1270 | { | |
1a258db6 AW |
1271 | int ret; |
1272 | struct mmc_blk_data *md = mq->data; | |
1273 | struct mmc_card *card = md->queue.card; | |
1274 | ||
ee8a43a5 PF |
1275 | if (req && !mq->mqrq_prev->req) |
1276 | /* claim host only for the first request */ | |
1277 | mmc_claim_host(card->host); | |
1278 | ||
371a689f AW |
1279 | ret = mmc_blk_part_switch(card, md); |
1280 | if (ret) { | |
0d7d85ca AH |
1281 | if (req) { |
1282 | spin_lock_irq(&md->lock); | |
1283 | __blk_end_request_all(req, -EIO); | |
1284 | spin_unlock_irq(&md->lock); | |
1285 | } | |
371a689f AW |
1286 | ret = 0; |
1287 | goto out; | |
1288 | } | |
1a258db6 | 1289 | |
ee8a43a5 PF |
1290 | if (req && req->cmd_flags & REQ_DISCARD) { |
1291 | /* complete ongoing async transfer before issuing discard */ | |
1292 | if (card->host->areq) | |
1293 | mmc_blk_issue_rw_rq(mq, NULL); | |
49804548 | 1294 | if (req->cmd_flags & REQ_SECURE) |
1a258db6 | 1295 | ret = mmc_blk_issue_secdiscard_rq(mq, req); |
49804548 | 1296 | else |
1a258db6 | 1297 | ret = mmc_blk_issue_discard_rq(mq, req); |
ee8a43a5 | 1298 | } else if (req && req->cmd_flags & REQ_FLUSH) { |
393f9a08 JC |
1299 | /* complete ongoing async transfer before issuing flush */ |
1300 | if (card->host->areq) | |
1301 | mmc_blk_issue_rw_rq(mq, NULL); | |
1a258db6 | 1302 | ret = mmc_blk_issue_flush(mq, req); |
49804548 | 1303 | } else { |
1a258db6 | 1304 | ret = mmc_blk_issue_rw_rq(mq, req); |
49804548 | 1305 | } |
1a258db6 | 1306 | |
371a689f | 1307 | out: |
ee8a43a5 PF |
1308 | if (!req) |
1309 | /* release host only when there are no more requests */ | |
1310 | mmc_release_host(card->host); | |
1a258db6 | 1311 | return ret; |
bd788c96 | 1312 | } |
1da177e4 | 1313 | |
a6f6c96b RK |
1314 | static inline int mmc_blk_readonly(struct mmc_card *card) |
1315 | { | |
1316 | return mmc_card_readonly(card) || | |
1317 | !(card->csd.cmdclass & CCC_BLOCK_WRITE); | |
1318 | } | |
1319 | ||
371a689f AW |
1320 | static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card, |
1321 | struct device *parent, | |
1322 | sector_t size, | |
1323 | bool default_ro, | |
1324 | const char *subname) | |
1da177e4 LT |
1325 | { |
1326 | struct mmc_blk_data *md; | |
1327 | int devidx, ret; | |
1328 | ||
5e71b7a6 OJ |
1329 | devidx = find_first_zero_bit(dev_use, max_devices); |
1330 | if (devidx >= max_devices) | |
1da177e4 LT |
1331 | return ERR_PTR(-ENOSPC); |
1332 | __set_bit(devidx, dev_use); | |
1333 | ||
dd00cc48 | 1334 | md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL); |
a6f6c96b RK |
1335 | if (!md) { |
1336 | ret = -ENOMEM; | |
1337 | goto out; | |
1338 | } | |
1da177e4 | 1339 | |
f06c9153 AW |
1340 | /* |
1341 | * !subname implies we are creating main mmc_blk_data that will be | |
1342 | * associated with mmc_card with mmc_set_drvdata. Due to device | |
1343 | * partitions, devidx will not coincide with a per-physical card | |
1344 | * index anymore so we keep track of a name index. | |
1345 | */ | |
1346 | if (!subname) { | |
1347 | md->name_idx = find_first_zero_bit(name_use, max_devices); | |
1348 | __set_bit(md->name_idx, name_use); | |
1349 | } | |
1350 | else | |
1351 | md->name_idx = ((struct mmc_blk_data *) | |
1352 | dev_to_disk(parent)->private_data)->name_idx; | |
1353 | ||
a6f6c96b RK |
1354 | /* |
1355 | * Set the read-only status based on the supported commands | |
1356 | * and the write protect switch. | |
1357 | */ | |
1358 | md->read_only = mmc_blk_readonly(card); | |
1da177e4 | 1359 | |
5e71b7a6 | 1360 | md->disk = alloc_disk(perdev_minors); |
a6f6c96b RK |
1361 | if (md->disk == NULL) { |
1362 | ret = -ENOMEM; | |
1363 | goto err_kfree; | |
1364 | } | |
1da177e4 | 1365 | |
a6f6c96b | 1366 | spin_lock_init(&md->lock); |
371a689f | 1367 | INIT_LIST_HEAD(&md->part); |
a6f6c96b | 1368 | md->usage = 1; |
1da177e4 | 1369 | |
d09408ad | 1370 | ret = mmc_init_queue(&md->queue, card, &md->lock, subname); |
a6f6c96b RK |
1371 | if (ret) |
1372 | goto err_putdisk; | |
1da177e4 | 1373 | |
a6f6c96b RK |
1374 | md->queue.issue_fn = mmc_blk_issue_rq; |
1375 | md->queue.data = md; | |
d2b18394 | 1376 | |
fe6b4c88 | 1377 | md->disk->major = MMC_BLOCK_MAJOR; |
5e71b7a6 | 1378 | md->disk->first_minor = devidx * perdev_minors; |
a6f6c96b RK |
1379 | md->disk->fops = &mmc_bdops; |
1380 | md->disk->private_data = md; | |
1381 | md->disk->queue = md->queue.queue; | |
371a689f AW |
1382 | md->disk->driverfs_dev = parent; |
1383 | set_disk_ro(md->disk, md->read_only || default_ro); | |
a6f6c96b RK |
1384 | |
1385 | /* | |
1386 | * As discussed on lkml, GENHD_FL_REMOVABLE should: | |
1387 | * | |
1388 | * - be set for removable media with permanent block devices | |
1389 | * - be unset for removable block devices with permanent media | |
1390 | * | |
1391 | * Since MMC block devices clearly fall under the second | |
1392 | * case, we do not set GENHD_FL_REMOVABLE. Userspace | |
1393 | * should use the block device creation/destruction hotplug | |
1394 | * messages to tell when the card is present. | |
1395 | */ | |
1396 | ||
f06c9153 AW |
1397 | snprintf(md->disk->disk_name, sizeof(md->disk->disk_name), |
1398 | "mmcblk%d%s", md->name_idx, subname ? subname : ""); | |
a6f6c96b | 1399 | |
e1defc4f | 1400 | blk_queue_logical_block_size(md->queue.queue, 512); |
371a689f | 1401 | set_capacity(md->disk, size); |
d0c97cfb | 1402 | |
f0d89972 AW |
1403 | if (mmc_host_cmd23(card->host)) { |
1404 | if (mmc_card_mmc(card) || | |
1405 | (mmc_card_sd(card) && | |
1406 | card->scr.cmds & SD_SCR_CMD23_SUPPORT)) | |
1407 | md->flags |= MMC_BLK_CMD23; | |
1408 | } | |
d0c97cfb AW |
1409 | |
1410 | if (mmc_card_mmc(card) && | |
1411 | md->flags & MMC_BLK_CMD23 && | |
1412 | ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) || | |
1413 | card->ext_csd.rel_sectors)) { | |
1414 | md->flags |= MMC_BLK_REL_WR; | |
1415 | blk_queue_flush(md->queue.queue, REQ_FLUSH | REQ_FUA); | |
1416 | } | |
1417 | ||
371a689f AW |
1418 | return md; |
1419 | ||
1420 | err_putdisk: | |
1421 | put_disk(md->disk); | |
1422 | err_kfree: | |
1423 | kfree(md); | |
1424 | out: | |
1425 | return ERR_PTR(ret); | |
1426 | } | |
1427 | ||
1428 | static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card) | |
1429 | { | |
1430 | sector_t size; | |
1431 | struct mmc_blk_data *md; | |
a6f6c96b | 1432 | |
85a18ad9 PO |
1433 | if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) { |
1434 | /* | |
1435 | * The EXT_CSD sector count is in number or 512 byte | |
1436 | * sectors. | |
1437 | */ | |
371a689f | 1438 | size = card->ext_csd.sectors; |
85a18ad9 PO |
1439 | } else { |
1440 | /* | |
1441 | * The CSD capacity field is in units of read_blkbits. | |
1442 | * set_capacity takes units of 512 bytes. | |
1443 | */ | |
371a689f | 1444 | size = card->csd.capacity << (card->csd.read_blkbits - 9); |
85a18ad9 | 1445 | } |
371a689f AW |
1446 | |
1447 | md = mmc_blk_alloc_req(card, &card->dev, size, false, NULL); | |
1da177e4 | 1448 | return md; |
371a689f | 1449 | } |
a6f6c96b | 1450 | |
371a689f AW |
1451 | static int mmc_blk_alloc_part(struct mmc_card *card, |
1452 | struct mmc_blk_data *md, | |
1453 | unsigned int part_type, | |
1454 | sector_t size, | |
1455 | bool default_ro, | |
1456 | const char *subname) | |
1457 | { | |
1458 | char cap_str[10]; | |
1459 | struct mmc_blk_data *part_md; | |
1460 | ||
1461 | part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro, | |
1462 | subname); | |
1463 | if (IS_ERR(part_md)) | |
1464 | return PTR_ERR(part_md); | |
1465 | part_md->part_type = part_type; | |
1466 | list_add(&part_md->part, &md->part); | |
1467 | ||
1468 | string_get_size((u64)get_capacity(part_md->disk) << 9, STRING_UNITS_2, | |
1469 | cap_str, sizeof(cap_str)); | |
1470 | printk(KERN_INFO "%s: %s %s partition %u %s\n", | |
1471 | part_md->disk->disk_name, mmc_card_id(card), | |
1472 | mmc_card_name(card), part_md->part_type, cap_str); | |
1473 | return 0; | |
1474 | } | |
1475 | ||
1476 | static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md) | |
1477 | { | |
1478 | int ret = 0; | |
1479 | ||
1480 | if (!mmc_card_mmc(card)) | |
1481 | return 0; | |
1482 | ||
f7c56ef2 | 1483 | if (card->ext_csd.boot_size && mmc_boot_partition_access(card->host)) { |
371a689f AW |
1484 | ret = mmc_blk_alloc_part(card, md, EXT_CSD_PART_CONFIG_ACC_BOOT0, |
1485 | card->ext_csd.boot_size >> 9, | |
1486 | true, | |
1487 | "boot0"); | |
1488 | if (ret) | |
1489 | return ret; | |
1490 | ret = mmc_blk_alloc_part(card, md, EXT_CSD_PART_CONFIG_ACC_BOOT1, | |
1491 | card->ext_csd.boot_size >> 9, | |
1492 | true, | |
1493 | "boot1"); | |
1494 | if (ret) | |
1495 | return ret; | |
1496 | } | |
1497 | ||
1498 | return ret; | |
1da177e4 LT |
1499 | } |
1500 | ||
1501 | static int | |
1502 | mmc_blk_set_blksize(struct mmc_blk_data *md, struct mmc_card *card) | |
1503 | { | |
1da177e4 LT |
1504 | int err; |
1505 | ||
b855885e | 1506 | mmc_claim_host(card->host); |
0f8d8ea6 | 1507 | err = mmc_set_blocklen(card, 512); |
b855885e | 1508 | mmc_release_host(card->host); |
1da177e4 LT |
1509 | |
1510 | if (err) { | |
0f8d8ea6 AH |
1511 | printk(KERN_ERR "%s: unable to set block size to 512: %d\n", |
1512 | md->disk->disk_name, err); | |
1da177e4 LT |
1513 | return -EINVAL; |
1514 | } | |
1515 | ||
1516 | return 0; | |
1517 | } | |
1518 | ||
371a689f AW |
1519 | static void mmc_blk_remove_req(struct mmc_blk_data *md) |
1520 | { | |
1521 | if (md) { | |
1522 | if (md->disk->flags & GENHD_FL_UP) { | |
1523 | device_remove_file(disk_to_dev(md->disk), &md->force_ro); | |
1524 | ||
1525 | /* Stop new requests from getting into the queue */ | |
1526 | del_gendisk(md->disk); | |
1527 | } | |
1528 | ||
1529 | /* Then flush out any already in there */ | |
1530 | mmc_cleanup_queue(&md->queue); | |
1531 | mmc_blk_put(md); | |
1532 | } | |
1533 | } | |
1534 | ||
1535 | static void mmc_blk_remove_parts(struct mmc_card *card, | |
1536 | struct mmc_blk_data *md) | |
1537 | { | |
1538 | struct list_head *pos, *q; | |
1539 | struct mmc_blk_data *part_md; | |
1540 | ||
f06c9153 | 1541 | __clear_bit(md->name_idx, name_use); |
371a689f AW |
1542 | list_for_each_safe(pos, q, &md->part) { |
1543 | part_md = list_entry(pos, struct mmc_blk_data, part); | |
1544 | list_del(pos); | |
1545 | mmc_blk_remove_req(part_md); | |
1546 | } | |
1547 | } | |
1548 | ||
1549 | static int mmc_add_disk(struct mmc_blk_data *md) | |
1550 | { | |
1551 | int ret; | |
1552 | ||
1553 | add_disk(md->disk); | |
1554 | md->force_ro.show = force_ro_show; | |
1555 | md->force_ro.store = force_ro_store; | |
641c3187 | 1556 | sysfs_attr_init(&md->force_ro.attr); |
371a689f AW |
1557 | md->force_ro.attr.name = "force_ro"; |
1558 | md->force_ro.attr.mode = S_IRUGO | S_IWUSR; | |
1559 | ret = device_create_file(disk_to_dev(md->disk), &md->force_ro); | |
1560 | if (ret) | |
1561 | del_gendisk(md->disk); | |
1562 | ||
1563 | return ret; | |
1564 | } | |
1565 | ||
6f60c222 AW |
1566 | static const struct mmc_fixup blk_fixups[] = |
1567 | { | |
6a7a6b45 AW |
1568 | MMC_FIXUP("SEM02G", 0x2, 0x100, add_quirk, MMC_QUIRK_INAND_CMD38), |
1569 | MMC_FIXUP("SEM04G", 0x2, 0x100, add_quirk, MMC_QUIRK_INAND_CMD38), | |
1570 | MMC_FIXUP("SEM08G", 0x2, 0x100, add_quirk, MMC_QUIRK_INAND_CMD38), | |
1571 | MMC_FIXUP("SEM16G", 0x2, 0x100, add_quirk, MMC_QUIRK_INAND_CMD38), | |
1572 | MMC_FIXUP("SEM32G", 0x2, 0x100, add_quirk, MMC_QUIRK_INAND_CMD38), | |
d0c97cfb AW |
1573 | |
1574 | /* | |
1575 | * Some MMC cards experience performance degradation with CMD23 | |
1576 | * instead of CMD12-bounded multiblock transfers. For now we'll | |
1577 | * black list what's bad... | |
1578 | * - Certain Toshiba cards. | |
1579 | * | |
1580 | * N.B. This doesn't affect SD cards. | |
1581 | */ | |
1582 | MMC_FIXUP("MMC08G", 0x11, CID_OEMID_ANY, add_quirk_mmc, | |
1583 | MMC_QUIRK_BLK_NO_CMD23), | |
1584 | MMC_FIXUP("MMC16G", 0x11, CID_OEMID_ANY, add_quirk_mmc, | |
1585 | MMC_QUIRK_BLK_NO_CMD23), | |
1586 | MMC_FIXUP("MMC32G", 0x11, CID_OEMID_ANY, add_quirk_mmc, | |
1587 | MMC_QUIRK_BLK_NO_CMD23), | |
6f60c222 AW |
1588 | END_FIXUP |
1589 | }; | |
1590 | ||
1da177e4 LT |
1591 | static int mmc_blk_probe(struct mmc_card *card) |
1592 | { | |
371a689f | 1593 | struct mmc_blk_data *md, *part_md; |
1da177e4 | 1594 | int err; |
a7bbb573 PO |
1595 | char cap_str[10]; |
1596 | ||
912490db PO |
1597 | /* |
1598 | * Check that the card supports the command class(es) we need. | |
1599 | */ | |
1600 | if (!(card->csd.cmdclass & CCC_BLOCK_READ)) | |
1da177e4 LT |
1601 | return -ENODEV; |
1602 | ||
1da177e4 LT |
1603 | md = mmc_blk_alloc(card); |
1604 | if (IS_ERR(md)) | |
1605 | return PTR_ERR(md); | |
1606 | ||
1607 | err = mmc_blk_set_blksize(md, card); | |
1608 | if (err) | |
1609 | goto out; | |
1610 | ||
444122fd | 1611 | string_get_size((u64)get_capacity(md->disk) << 9, STRING_UNITS_2, |
a7bbb573 PO |
1612 | cap_str, sizeof(cap_str)); |
1613 | printk(KERN_INFO "%s: %s %s %s %s\n", | |
1da177e4 | 1614 | md->disk->disk_name, mmc_card_id(card), mmc_card_name(card), |
a7bbb573 | 1615 | cap_str, md->read_only ? "(ro)" : ""); |
1da177e4 | 1616 | |
371a689f AW |
1617 | if (mmc_blk_alloc_parts(card, md)) |
1618 | goto out; | |
1619 | ||
1da177e4 | 1620 | mmc_set_drvdata(card, md); |
6f60c222 AW |
1621 | mmc_fixup_device(card, blk_fixups); |
1622 | ||
371a689f AW |
1623 | if (mmc_add_disk(md)) |
1624 | goto out; | |
1625 | ||
1626 | list_for_each_entry(part_md, &md->part, part) { | |
1627 | if (mmc_add_disk(part_md)) | |
1628 | goto out; | |
1629 | } | |
1da177e4 LT |
1630 | return 0; |
1631 | ||
1632 | out: | |
371a689f AW |
1633 | mmc_blk_remove_parts(card, md); |
1634 | mmc_blk_remove_req(md); | |
1da177e4 LT |
1635 | return err; |
1636 | } | |
1637 | ||
1638 | static void mmc_blk_remove(struct mmc_card *card) | |
1639 | { | |
1640 | struct mmc_blk_data *md = mmc_get_drvdata(card); | |
1641 | ||
371a689f | 1642 | mmc_blk_remove_parts(card, md); |
ddd6fa7e AH |
1643 | mmc_claim_host(card->host); |
1644 | mmc_blk_part_switch(card, md); | |
1645 | mmc_release_host(card->host); | |
371a689f | 1646 | mmc_blk_remove_req(md); |
1da177e4 LT |
1647 | mmc_set_drvdata(card, NULL); |
1648 | } | |
1649 | ||
1650 | #ifdef CONFIG_PM | |
1651 | static int mmc_blk_suspend(struct mmc_card *card, pm_message_t state) | |
1652 | { | |
371a689f | 1653 | struct mmc_blk_data *part_md; |
1da177e4 LT |
1654 | struct mmc_blk_data *md = mmc_get_drvdata(card); |
1655 | ||
1656 | if (md) { | |
1657 | mmc_queue_suspend(&md->queue); | |
371a689f AW |
1658 | list_for_each_entry(part_md, &md->part, part) { |
1659 | mmc_queue_suspend(&part_md->queue); | |
1660 | } | |
1da177e4 LT |
1661 | } |
1662 | return 0; | |
1663 | } | |
1664 | ||
1665 | static int mmc_blk_resume(struct mmc_card *card) | |
1666 | { | |
371a689f | 1667 | struct mmc_blk_data *part_md; |
1da177e4 LT |
1668 | struct mmc_blk_data *md = mmc_get_drvdata(card); |
1669 | ||
1670 | if (md) { | |
1671 | mmc_blk_set_blksize(md, card); | |
371a689f AW |
1672 | |
1673 | /* | |
1674 | * Resume involves the card going into idle state, | |
1675 | * so current partition is always the main one. | |
1676 | */ | |
1677 | md->part_curr = md->part_type; | |
1da177e4 | 1678 | mmc_queue_resume(&md->queue); |
371a689f AW |
1679 | list_for_each_entry(part_md, &md->part, part) { |
1680 | mmc_queue_resume(&part_md->queue); | |
1681 | } | |
1da177e4 LT |
1682 | } |
1683 | return 0; | |
1684 | } | |
1685 | #else | |
1686 | #define mmc_blk_suspend NULL | |
1687 | #define mmc_blk_resume NULL | |
1688 | #endif | |
1689 | ||
1690 | static struct mmc_driver mmc_driver = { | |
1691 | .drv = { | |
1692 | .name = "mmcblk", | |
1693 | }, | |
1694 | .probe = mmc_blk_probe, | |
1695 | .remove = mmc_blk_remove, | |
1696 | .suspend = mmc_blk_suspend, | |
1697 | .resume = mmc_blk_resume, | |
1698 | }; | |
1699 | ||
1700 | static int __init mmc_blk_init(void) | |
1701 | { | |
9d4e98e9 | 1702 | int res; |
1da177e4 | 1703 | |
5e71b7a6 OJ |
1704 | if (perdev_minors != CONFIG_MMC_BLOCK_MINORS) |
1705 | pr_info("mmcblk: using %d minors per device\n", perdev_minors); | |
1706 | ||
1707 | max_devices = 256 / perdev_minors; | |
1708 | ||
fe6b4c88 PO |
1709 | res = register_blkdev(MMC_BLOCK_MAJOR, "mmc"); |
1710 | if (res) | |
1da177e4 | 1711 | goto out; |
1da177e4 | 1712 | |
9d4e98e9 AM |
1713 | res = mmc_register_driver(&mmc_driver); |
1714 | if (res) | |
1715 | goto out2; | |
1da177e4 | 1716 | |
9d4e98e9 AM |
1717 | return 0; |
1718 | out2: | |
1719 | unregister_blkdev(MMC_BLOCK_MAJOR, "mmc"); | |
1da177e4 LT |
1720 | out: |
1721 | return res; | |
1722 | } | |
1723 | ||
1724 | static void __exit mmc_blk_exit(void) | |
1725 | { | |
1726 | mmc_unregister_driver(&mmc_driver); | |
fe6b4c88 | 1727 | unregister_blkdev(MMC_BLOCK_MAJOR, "mmc"); |
1da177e4 LT |
1728 | } |
1729 | ||
1730 | module_init(mmc_blk_init); | |
1731 | module_exit(mmc_blk_exit); | |
1732 | ||
1733 | MODULE_LICENSE("GPL"); | |
1734 | MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver"); | |
1735 |