Commit | Line | Data |
---|---|---|
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> |
1da177e4 LT |
34 | |
35 | #include <linux/mmc/card.h> | |
385e3227 | 36 | #include <linux/mmc/host.h> |
da7fbe58 PO |
37 | #include <linux/mmc/mmc.h> |
38 | #include <linux/mmc/sd.h> | |
1da177e4 LT |
39 | |
40 | #include <asm/system.h> | |
41 | #include <asm/uaccess.h> | |
42 | ||
98ac2162 | 43 | #include "queue.h" |
1da177e4 | 44 | |
6b0b6285 | 45 | MODULE_ALIAS("mmc:block"); |
5e71b7a6 OJ |
46 | #ifdef MODULE_PARAM_PREFIX |
47 | #undef MODULE_PARAM_PREFIX | |
48 | #endif | |
49 | #define MODULE_PARAM_PREFIX "mmcblk." | |
50 | ||
6a7a6b45 AW |
51 | #define INAND_CMD38_ARG_EXT_CSD 113 |
52 | #define INAND_CMD38_ARG_ERASE 0x00 | |
53 | #define INAND_CMD38_ARG_TRIM 0x01 | |
54 | #define INAND_CMD38_ARG_SECERASE 0x80 | |
55 | #define INAND_CMD38_ARG_SECTRIM1 0x81 | |
56 | #define INAND_CMD38_ARG_SECTRIM2 0x88 | |
57 | ||
f4c5522b AW |
58 | #define REL_WRITES_SUPPORTED(card) (mmc_card_mmc((card)) && \ |
59 | (((card)->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) || \ | |
60 | ((card)->ext_csd.rel_sectors))) | |
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 LT |
88 | |
89 | unsigned int usage; | |
a6f6c96b | 90 | unsigned int read_only; |
371a689f | 91 | unsigned int part_type; |
f06c9153 | 92 | unsigned int name_idx; |
371a689f AW |
93 | |
94 | /* | |
95 | * Only set in main mmc_blk_data associated | |
96 | * with mmc_card with mmc_set_drvdata, and keeps | |
97 | * track of the current selected device partition. | |
98 | */ | |
99 | unsigned int part_curr; | |
100 | struct device_attribute force_ro; | |
1da177e4 LT |
101 | }; |
102 | ||
a621aaed | 103 | static DEFINE_MUTEX(open_lock); |
1da177e4 | 104 | |
5e71b7a6 OJ |
105 | module_param(perdev_minors, int, 0444); |
106 | MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device"); | |
107 | ||
1da177e4 LT |
108 | static struct mmc_blk_data *mmc_blk_get(struct gendisk *disk) |
109 | { | |
110 | struct mmc_blk_data *md; | |
111 | ||
a621aaed | 112 | mutex_lock(&open_lock); |
1da177e4 LT |
113 | md = disk->private_data; |
114 | if (md && md->usage == 0) | |
115 | md = NULL; | |
116 | if (md) | |
117 | md->usage++; | |
a621aaed | 118 | mutex_unlock(&open_lock); |
1da177e4 LT |
119 | |
120 | return md; | |
121 | } | |
122 | ||
371a689f AW |
123 | static inline int mmc_get_devidx(struct gendisk *disk) |
124 | { | |
125 | int devmaj = MAJOR(disk_devt(disk)); | |
126 | int devidx = MINOR(disk_devt(disk)) / perdev_minors; | |
127 | ||
128 | if (!devmaj) | |
129 | devidx = disk->first_minor / perdev_minors; | |
130 | return devidx; | |
131 | } | |
132 | ||
1da177e4 LT |
133 | static void mmc_blk_put(struct mmc_blk_data *md) |
134 | { | |
a621aaed | 135 | mutex_lock(&open_lock); |
1da177e4 LT |
136 | md->usage--; |
137 | if (md->usage == 0) { | |
371a689f | 138 | int devidx = mmc_get_devidx(md->disk); |
5fa83ce2 AH |
139 | blk_cleanup_queue(md->queue.queue); |
140 | ||
1dff3144 DW |
141 | __clear_bit(devidx, dev_use); |
142 | ||
1da177e4 | 143 | put_disk(md->disk); |
1da177e4 LT |
144 | kfree(md); |
145 | } | |
a621aaed | 146 | mutex_unlock(&open_lock); |
1da177e4 LT |
147 | } |
148 | ||
371a689f AW |
149 | static ssize_t force_ro_show(struct device *dev, struct device_attribute *attr, |
150 | char *buf) | |
151 | { | |
152 | int ret; | |
153 | struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev)); | |
154 | ||
155 | ret = snprintf(buf, PAGE_SIZE, "%d", | |
156 | get_disk_ro(dev_to_disk(dev)) ^ | |
157 | md->read_only); | |
158 | mmc_blk_put(md); | |
159 | return ret; | |
160 | } | |
161 | ||
162 | static ssize_t force_ro_store(struct device *dev, struct device_attribute *attr, | |
163 | const char *buf, size_t count) | |
164 | { | |
165 | int ret; | |
166 | char *end; | |
167 | struct mmc_blk_data *md = mmc_blk_get(dev_to_disk(dev)); | |
168 | unsigned long set = simple_strtoul(buf, &end, 0); | |
169 | if (end == buf) { | |
170 | ret = -EINVAL; | |
171 | goto out; | |
172 | } | |
173 | ||
174 | set_disk_ro(dev_to_disk(dev), set || md->read_only); | |
175 | ret = count; | |
176 | out: | |
177 | mmc_blk_put(md); | |
178 | return ret; | |
179 | } | |
180 | ||
a5a1561f | 181 | static int mmc_blk_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 182 | { |
a5a1561f | 183 | struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk); |
1da177e4 LT |
184 | int ret = -ENXIO; |
185 | ||
2a48fc0a | 186 | mutex_lock(&block_mutex); |
1da177e4 LT |
187 | if (md) { |
188 | if (md->usage == 2) | |
a5a1561f | 189 | check_disk_change(bdev); |
1da177e4 | 190 | ret = 0; |
a00fc090 | 191 | |
a5a1561f | 192 | if ((mode & FMODE_WRITE) && md->read_only) { |
70bb0896 | 193 | mmc_blk_put(md); |
a00fc090 | 194 | ret = -EROFS; |
70bb0896 | 195 | } |
1da177e4 | 196 | } |
2a48fc0a | 197 | mutex_unlock(&block_mutex); |
1da177e4 LT |
198 | |
199 | return ret; | |
200 | } | |
201 | ||
a5a1561f | 202 | static int mmc_blk_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 203 | { |
a5a1561f | 204 | struct mmc_blk_data *md = disk->private_data; |
1da177e4 | 205 | |
2a48fc0a | 206 | mutex_lock(&block_mutex); |
1da177e4 | 207 | mmc_blk_put(md); |
2a48fc0a | 208 | mutex_unlock(&block_mutex); |
1da177e4 LT |
209 | return 0; |
210 | } | |
211 | ||
212 | static int | |
a885c8c4 | 213 | mmc_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4 | 214 | { |
a885c8c4 CH |
215 | geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16); |
216 | geo->heads = 4; | |
217 | geo->sectors = 16; | |
218 | return 0; | |
1da177e4 LT |
219 | } |
220 | ||
83d5cde4 | 221 | static const struct block_device_operations mmc_bdops = { |
a5a1561f AV |
222 | .open = mmc_blk_open, |
223 | .release = mmc_blk_release, | |
a885c8c4 | 224 | .getgeo = mmc_blk_getgeo, |
1da177e4 LT |
225 | .owner = THIS_MODULE, |
226 | }; | |
227 | ||
228 | struct mmc_blk_request { | |
229 | struct mmc_request mrq; | |
230 | struct mmc_command cmd; | |
231 | struct mmc_command stop; | |
232 | struct mmc_data data; | |
233 | }; | |
234 | ||
371a689f AW |
235 | static inline int mmc_blk_part_switch(struct mmc_card *card, |
236 | struct mmc_blk_data *md) | |
237 | { | |
238 | int ret; | |
239 | struct mmc_blk_data *main_md = mmc_get_drvdata(card); | |
240 | if (main_md->part_curr == md->part_type) | |
241 | return 0; | |
242 | ||
243 | if (mmc_card_mmc(card)) { | |
244 | card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK; | |
245 | card->ext_csd.part_config |= md->part_type; | |
246 | ||
247 | ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
248 | EXT_CSD_PART_CONFIG, card->ext_csd.part_config, | |
249 | card->ext_csd.part_time); | |
250 | if (ret) | |
251 | return ret; | |
252 | } | |
253 | ||
254 | main_md->part_curr = md->part_type; | |
255 | return 0; | |
256 | } | |
257 | ||
ec5a19dd PO |
258 | static u32 mmc_sd_num_wr_blocks(struct mmc_card *card) |
259 | { | |
260 | int err; | |
051913da BD |
261 | u32 result; |
262 | __be32 *blocks; | |
ec5a19dd | 263 | |
24f5b53b | 264 | struct mmc_request mrq = {0}; |
1278dba1 | 265 | struct mmc_command cmd = {0}; |
a61ad2b4 | 266 | struct mmc_data data = {0}; |
ec5a19dd PO |
267 | unsigned int timeout_us; |
268 | ||
269 | struct scatterlist sg; | |
270 | ||
ec5a19dd PO |
271 | cmd.opcode = MMC_APP_CMD; |
272 | cmd.arg = card->rca << 16; | |
7213d175 | 273 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC; |
ec5a19dd PO |
274 | |
275 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
7213d175 DB |
276 | if (err) |
277 | return (u32)-1; | |
278 | if (!mmc_host_is_spi(card->host) && !(cmd.resp[0] & R1_APP_CMD)) | |
ec5a19dd PO |
279 | return (u32)-1; |
280 | ||
281 | memset(&cmd, 0, sizeof(struct mmc_command)); | |
282 | ||
283 | cmd.opcode = SD_APP_SEND_NUM_WR_BLKS; | |
284 | cmd.arg = 0; | |
7213d175 | 285 | cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; |
ec5a19dd | 286 | |
ec5a19dd PO |
287 | data.timeout_ns = card->csd.tacc_ns * 100; |
288 | data.timeout_clks = card->csd.tacc_clks * 100; | |
289 | ||
290 | timeout_us = data.timeout_ns / 1000; | |
291 | timeout_us += data.timeout_clks * 1000 / | |
292 | (card->host->ios.clock / 1000); | |
293 | ||
294 | if (timeout_us > 100000) { | |
295 | data.timeout_ns = 100000000; | |
296 | data.timeout_clks = 0; | |
297 | } | |
298 | ||
299 | data.blksz = 4; | |
300 | data.blocks = 1; | |
301 | data.flags = MMC_DATA_READ; | |
302 | data.sg = &sg; | |
303 | data.sg_len = 1; | |
304 | ||
ec5a19dd PO |
305 | mrq.cmd = &cmd; |
306 | mrq.data = &data; | |
307 | ||
051913da BD |
308 | blocks = kmalloc(4, GFP_KERNEL); |
309 | if (!blocks) | |
310 | return (u32)-1; | |
311 | ||
312 | sg_init_one(&sg, blocks, 4); | |
ec5a19dd PO |
313 | |
314 | mmc_wait_for_req(card->host, &mrq); | |
315 | ||
051913da BD |
316 | result = ntohl(*blocks); |
317 | kfree(blocks); | |
318 | ||
17b0429d | 319 | if (cmd.error || data.error) |
051913da | 320 | result = (u32)-1; |
ec5a19dd | 321 | |
051913da | 322 | return result; |
ec5a19dd PO |
323 | } |
324 | ||
504f191f AH |
325 | static u32 get_card_status(struct mmc_card *card, struct request *req) |
326 | { | |
1278dba1 | 327 | struct mmc_command cmd = {0}; |
504f191f AH |
328 | int err; |
329 | ||
504f191f AH |
330 | cmd.opcode = MMC_SEND_STATUS; |
331 | if (!mmc_host_is_spi(card->host)) | |
332 | cmd.arg = card->rca << 16; | |
333 | cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC; | |
334 | err = mmc_wait_for_cmd(card->host, &cmd, 0); | |
335 | if (err) | |
b595076a | 336 | printk(KERN_ERR "%s: error %d sending status command", |
504f191f AH |
337 | req->rq_disk->disk_name, err); |
338 | return cmd.resp[0]; | |
339 | } | |
340 | ||
bd788c96 AH |
341 | static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req) |
342 | { | |
343 | struct mmc_blk_data *md = mq->data; | |
344 | struct mmc_card *card = md->queue.card; | |
345 | unsigned int from, nr, arg; | |
346 | int err = 0; | |
347 | ||
bd788c96 AH |
348 | if (!mmc_can_erase(card)) { |
349 | err = -EOPNOTSUPP; | |
350 | goto out; | |
351 | } | |
352 | ||
353 | from = blk_rq_pos(req); | |
354 | nr = blk_rq_sectors(req); | |
355 | ||
356 | if (mmc_can_trim(card)) | |
357 | arg = MMC_TRIM_ARG; | |
358 | else | |
359 | arg = MMC_ERASE_ARG; | |
360 | ||
6a7a6b45 AW |
361 | if (card->quirks & MMC_QUIRK_INAND_CMD38) { |
362 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
363 | INAND_CMD38_ARG_EXT_CSD, | |
364 | arg == MMC_TRIM_ARG ? | |
365 | INAND_CMD38_ARG_TRIM : | |
366 | INAND_CMD38_ARG_ERASE, | |
367 | 0); | |
368 | if (err) | |
369 | goto out; | |
370 | } | |
bd788c96 AH |
371 | err = mmc_erase(card, from, nr, arg); |
372 | out: | |
373 | spin_lock_irq(&md->lock); | |
374 | __blk_end_request(req, err, blk_rq_bytes(req)); | |
375 | spin_unlock_irq(&md->lock); | |
376 | ||
bd788c96 AH |
377 | return err ? 0 : 1; |
378 | } | |
379 | ||
49804548 AH |
380 | static int mmc_blk_issue_secdiscard_rq(struct mmc_queue *mq, |
381 | struct request *req) | |
382 | { | |
383 | struct mmc_blk_data *md = mq->data; | |
384 | struct mmc_card *card = md->queue.card; | |
385 | unsigned int from, nr, arg; | |
386 | int err = 0; | |
387 | ||
49804548 AH |
388 | if (!mmc_can_secure_erase_trim(card)) { |
389 | err = -EOPNOTSUPP; | |
390 | goto out; | |
391 | } | |
392 | ||
393 | from = blk_rq_pos(req); | |
394 | nr = blk_rq_sectors(req); | |
395 | ||
396 | if (mmc_can_trim(card) && !mmc_erase_group_aligned(card, from, nr)) | |
397 | arg = MMC_SECURE_TRIM1_ARG; | |
398 | else | |
399 | arg = MMC_SECURE_ERASE_ARG; | |
400 | ||
6a7a6b45 AW |
401 | if (card->quirks & MMC_QUIRK_INAND_CMD38) { |
402 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
403 | INAND_CMD38_ARG_EXT_CSD, | |
404 | arg == MMC_SECURE_TRIM1_ARG ? | |
405 | INAND_CMD38_ARG_SECTRIM1 : | |
406 | INAND_CMD38_ARG_SECERASE, | |
407 | 0); | |
408 | if (err) | |
409 | goto out; | |
410 | } | |
49804548 | 411 | err = mmc_erase(card, from, nr, arg); |
6a7a6b45 AW |
412 | if (!err && arg == MMC_SECURE_TRIM1_ARG) { |
413 | if (card->quirks & MMC_QUIRK_INAND_CMD38) { | |
414 | err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, | |
415 | INAND_CMD38_ARG_EXT_CSD, | |
416 | INAND_CMD38_ARG_SECTRIM2, | |
417 | 0); | |
418 | if (err) | |
419 | goto out; | |
420 | } | |
49804548 | 421 | err = mmc_erase(card, from, nr, MMC_SECURE_TRIM2_ARG); |
6a7a6b45 | 422 | } |
49804548 AH |
423 | out: |
424 | spin_lock_irq(&md->lock); | |
425 | __blk_end_request(req, err, blk_rq_bytes(req)); | |
426 | spin_unlock_irq(&md->lock); | |
427 | ||
49804548 AH |
428 | return err ? 0 : 1; |
429 | } | |
430 | ||
f4c5522b AW |
431 | static int mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req) |
432 | { | |
433 | struct mmc_blk_data *md = mq->data; | |
434 | ||
435 | /* | |
436 | * No-op, only service this because we need REQ_FUA for reliable | |
437 | * writes. | |
438 | */ | |
439 | spin_lock_irq(&md->lock); | |
440 | __blk_end_request_all(req, 0); | |
441 | spin_unlock_irq(&md->lock); | |
442 | ||
443 | return 1; | |
444 | } | |
445 | ||
446 | /* | |
447 | * Reformat current write as a reliable write, supporting | |
448 | * both legacy and the enhanced reliable write MMC cards. | |
449 | * In each transfer we'll handle only as much as a single | |
450 | * reliable write can handle, thus finish the request in | |
451 | * partial completions. | |
452 | */ | |
453 | static inline int mmc_apply_rel_rw(struct mmc_blk_request *brq, | |
454 | struct mmc_card *card, | |
455 | struct request *req) | |
456 | { | |
457 | int err; | |
1278dba1 | 458 | struct mmc_command set_count = {0}; |
f4c5522b AW |
459 | |
460 | if (!(card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN)) { | |
461 | /* Legacy mode imposes restrictions on transfers. */ | |
462 | if (!IS_ALIGNED(brq->cmd.arg, card->ext_csd.rel_sectors)) | |
463 | brq->data.blocks = 1; | |
464 | ||
465 | if (brq->data.blocks > card->ext_csd.rel_sectors) | |
466 | brq->data.blocks = card->ext_csd.rel_sectors; | |
467 | else if (brq->data.blocks < card->ext_csd.rel_sectors) | |
468 | brq->data.blocks = 1; | |
469 | } | |
470 | ||
f4c5522b AW |
471 | set_count.opcode = MMC_SET_BLOCK_COUNT; |
472 | set_count.arg = brq->data.blocks | (1 << 31); | |
473 | set_count.flags = MMC_RSP_R1 | MMC_CMD_AC; | |
474 | err = mmc_wait_for_cmd(card->host, &set_count, 0); | |
475 | if (err) | |
476 | printk(KERN_ERR "%s: error %d SET_BLOCK_COUNT\n", | |
477 | req->rq_disk->disk_name, err); | |
478 | return err; | |
479 | } | |
480 | ||
bd788c96 | 481 | static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req) |
1da177e4 LT |
482 | { |
483 | struct mmc_blk_data *md = mq->data; | |
484 | struct mmc_card *card = md->queue.card; | |
176f00ff | 485 | struct mmc_blk_request brq; |
6a79e391 | 486 | int ret = 1, disable_multi = 0; |
1da177e4 | 487 | |
f4c5522b AW |
488 | /* |
489 | * Reliable writes are used to implement Forced Unit Access and | |
490 | * REQ_META accesses, and are supported only on MMCs. | |
491 | */ | |
492 | bool do_rel_wr = ((req->cmd_flags & REQ_FUA) || | |
493 | (req->cmd_flags & REQ_META)) && | |
494 | (rq_data_dir(req) == WRITE) && | |
495 | REL_WRITES_SUPPORTED(card); | |
496 | ||
1da177e4 | 497 | do { |
1278dba1 | 498 | struct mmc_command cmd = {0}; |
504f191f | 499 | u32 readcmd, writecmd, status = 0; |
1da177e4 LT |
500 | |
501 | memset(&brq, 0, sizeof(struct mmc_blk_request)); | |
502 | brq.mrq.cmd = &brq.cmd; | |
503 | brq.mrq.data = &brq.data; | |
504 | ||
83096ebf | 505 | brq.cmd.arg = blk_rq_pos(req); |
fba68bd2 PL |
506 | if (!mmc_card_blockaddr(card)) |
507 | brq.cmd.arg <<= 9; | |
7213d175 | 508 | brq.cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; |
08846698 | 509 | brq.data.blksz = 512; |
1da177e4 LT |
510 | brq.stop.opcode = MMC_STOP_TRANSMISSION; |
511 | brq.stop.arg = 0; | |
7213d175 | 512 | brq.stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; |
83096ebf | 513 | brq.data.blocks = blk_rq_sectors(req); |
1da177e4 | 514 | |
548d2de9 PO |
515 | /* |
516 | * The block layer doesn't support all sector count | |
517 | * restrictions, so we need to be prepared for too big | |
518 | * requests. | |
519 | */ | |
520 | if (brq.data.blocks > card->host->max_blk_count) | |
521 | brq.data.blocks = card->host->max_blk_count; | |
522 | ||
6a79e391 AH |
523 | /* |
524 | * After a read error, we redo the request one sector at a time | |
525 | * in order to accurately determine which sectors can be read | |
526 | * successfully. | |
527 | */ | |
528 | if (disable_multi && brq.data.blocks > 1) | |
529 | brq.data.blocks = 1; | |
530 | ||
f4c5522b | 531 | if (brq.data.blocks > 1 || do_rel_wr) { |
7213d175 | 532 | /* SPI multiblock writes terminate using a special |
f4c5522b AW |
533 | * token, not a STOP_TRANSMISSION request. Reliable |
534 | * writes use SET_BLOCK_COUNT and do not use a | |
535 | * STOP_TRANSMISSION request either. | |
7213d175 | 536 | */ |
f4c5522b AW |
537 | if ((!mmc_host_is_spi(card->host) && !do_rel_wr) || |
538 | rq_data_dir(req) == READ) | |
7213d175 | 539 | brq.mrq.stop = &brq.stop; |
db53f28b RK |
540 | readcmd = MMC_READ_MULTIPLE_BLOCK; |
541 | writecmd = MMC_WRITE_MULTIPLE_BLOCK; | |
788ee7b0 RK |
542 | } else { |
543 | brq.mrq.stop = NULL; | |
db53f28b RK |
544 | readcmd = MMC_READ_SINGLE_BLOCK; |
545 | writecmd = MMC_WRITE_BLOCK; | |
546 | } | |
db53f28b RK |
547 | if (rq_data_dir(req) == READ) { |
548 | brq.cmd.opcode = readcmd; | |
549 | brq.data.flags |= MMC_DATA_READ; | |
550 | } else { | |
551 | brq.cmd.opcode = writecmd; | |
552 | brq.data.flags |= MMC_DATA_WRITE; | |
788ee7b0 | 553 | } |
1da177e4 | 554 | |
f4c5522b AW |
555 | if (do_rel_wr && mmc_apply_rel_rw(&brq, card, req)) |
556 | goto cmd_err; | |
557 | ||
b146d26a PO |
558 | mmc_set_data_timeout(&brq.data, card); |
559 | ||
1da177e4 | 560 | brq.data.sg = mq->sg; |
98ccf149 PO |
561 | brq.data.sg_len = mmc_queue_map_sg(mq); |
562 | ||
6a79e391 AH |
563 | /* |
564 | * Adjust the sg list so it is the same size as the | |
565 | * request. | |
566 | */ | |
83096ebf | 567 | if (brq.data.blocks != blk_rq_sectors(req)) { |
6a79e391 AH |
568 | int i, data_size = brq.data.blocks << 9; |
569 | struct scatterlist *sg; | |
570 | ||
571 | for_each_sg(brq.data.sg, sg, brq.data.sg_len, i) { | |
572 | data_size -= sg->length; | |
573 | if (data_size <= 0) { | |
574 | sg->length += data_size; | |
575 | i++; | |
576 | break; | |
577 | } | |
578 | } | |
579 | brq.data.sg_len = i; | |
580 | } | |
581 | ||
98ccf149 | 582 | mmc_queue_bounce_pre(mq); |
1da177e4 LT |
583 | |
584 | mmc_wait_for_req(card->host, &brq.mrq); | |
98ccf149 PO |
585 | |
586 | mmc_queue_bounce_post(mq); | |
587 | ||
979ce720 PO |
588 | /* |
589 | * Check for errors here, but don't jump to cmd_err | |
590 | * until later as we need to wait for the card to leave | |
591 | * programming mode even when things go wrong. | |
592 | */ | |
6a79e391 AH |
593 | if (brq.cmd.error || brq.data.error || brq.stop.error) { |
594 | if (brq.data.blocks > 1 && rq_data_dir(req) == READ) { | |
595 | /* Redo read one sector at a time */ | |
596 | printk(KERN_WARNING "%s: retrying using single " | |
597 | "block read\n", req->rq_disk->disk_name); | |
598 | disable_multi = 1; | |
599 | continue; | |
600 | } | |
504f191f | 601 | status = get_card_status(card, req); |
6a79e391 | 602 | } |
504f191f | 603 | |
1da177e4 | 604 | if (brq.cmd.error) { |
504f191f AH |
605 | printk(KERN_ERR "%s: error %d sending read/write " |
606 | "command, response %#x, card status %#x\n", | |
607 | req->rq_disk->disk_name, brq.cmd.error, | |
608 | brq.cmd.resp[0], status); | |
1da177e4 LT |
609 | } |
610 | ||
611 | if (brq.data.error) { | |
504f191f AH |
612 | if (brq.data.error == -ETIMEDOUT && brq.mrq.stop) |
613 | /* 'Stop' response contains card status */ | |
614 | status = brq.mrq.stop->resp[0]; | |
615 | printk(KERN_ERR "%s: error %d transferring data," | |
616 | " sector %u, nr %u, card status %#x\n", | |
617 | req->rq_disk->disk_name, brq.data.error, | |
83096ebf TH |
618 | (unsigned)blk_rq_pos(req), |
619 | (unsigned)blk_rq_sectors(req), status); | |
1da177e4 LT |
620 | } |
621 | ||
622 | if (brq.stop.error) { | |
504f191f AH |
623 | printk(KERN_ERR "%s: error %d sending stop command, " |
624 | "response %#x, card status %#x\n", | |
625 | req->rq_disk->disk_name, brq.stop.error, | |
626 | brq.stop.resp[0], status); | |
1da177e4 LT |
627 | } |
628 | ||
7213d175 | 629 | if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) { |
2ed6d22c RK |
630 | do { |
631 | int err; | |
632 | ||
633 | cmd.opcode = MMC_SEND_STATUS; | |
634 | cmd.arg = card->rca << 16; | |
635 | cmd.flags = MMC_RSP_R1 | MMC_CMD_AC; | |
636 | err = mmc_wait_for_cmd(card->host, &cmd, 5); | |
637 | if (err) { | |
638 | printk(KERN_ERR "%s: error %d requesting status\n", | |
639 | req->rq_disk->disk_name, err); | |
640 | goto cmd_err; | |
641 | } | |
d198f101 PO |
642 | /* |
643 | * Some cards mishandle the status bits, | |
644 | * so make sure to check both the busy | |
645 | * indication and the card state. | |
646 | */ | |
647 | } while (!(cmd.resp[0] & R1_READY_FOR_DATA) || | |
648 | (R1_CURRENT_STATE(cmd.resp[0]) == 7)); | |
1da177e4 LT |
649 | |
650 | #if 0 | |
2ed6d22c RK |
651 | if (cmd.resp[0] & ~0x00000900) |
652 | printk(KERN_ERR "%s: status = %08x\n", | |
653 | req->rq_disk->disk_name, cmd.resp[0]); | |
654 | if (mmc_decode_status(cmd.resp)) | |
655 | goto cmd_err; | |
1da177e4 | 656 | #endif |
2ed6d22c | 657 | } |
1da177e4 | 658 | |
6a79e391 AH |
659 | if (brq.cmd.error || brq.stop.error || brq.data.error) { |
660 | if (rq_data_dir(req) == READ) { | |
661 | /* | |
662 | * After an error, we redo I/O one sector at a | |
663 | * time, so we only reach here after trying to | |
664 | * read a single sector. | |
665 | */ | |
666 | spin_lock_irq(&md->lock); | |
667 | ret = __blk_end_request(req, -EIO, brq.data.blksz); | |
668 | spin_unlock_irq(&md->lock); | |
669 | continue; | |
670 | } | |
979ce720 | 671 | goto cmd_err; |
6a79e391 | 672 | } |
979ce720 | 673 | |
1da177e4 LT |
674 | /* |
675 | * A block was successfully transferred. | |
676 | */ | |
677 | spin_lock_irq(&md->lock); | |
fd539832 | 678 | ret = __blk_end_request(req, 0, brq.data.bytes_xfered); |
1da177e4 LT |
679 | spin_unlock_irq(&md->lock); |
680 | } while (ret); | |
681 | ||
1da177e4 LT |
682 | return 1; |
683 | ||
684 | cmd_err: | |
ec5a19dd PO |
685 | /* |
686 | * If this is an SD card and we're writing, we can first | |
687 | * mark the known good sectors as ok. | |
688 | * | |
689 | * If the card is not SD, we can still ok written sectors | |
23af6039 PO |
690 | * as reported by the controller (which might be less than |
691 | * the real number of written sectors, but never more). | |
1da177e4 | 692 | */ |
6a79e391 AH |
693 | if (mmc_card_sd(card)) { |
694 | u32 blocks; | |
23af6039 | 695 | |
6a79e391 AH |
696 | blocks = mmc_sd_num_wr_blocks(card); |
697 | if (blocks != (u32)-1) { | |
ec5a19dd | 698 | spin_lock_irq(&md->lock); |
6a79e391 | 699 | ret = __blk_end_request(req, 0, blocks << 9); |
ec5a19dd PO |
700 | spin_unlock_irq(&md->lock); |
701 | } | |
6a79e391 AH |
702 | } else { |
703 | spin_lock_irq(&md->lock); | |
704 | ret = __blk_end_request(req, 0, brq.data.bytes_xfered); | |
705 | spin_unlock_irq(&md->lock); | |
176f00ff PO |
706 | } |
707 | ||
1da177e4 | 708 | spin_lock_irq(&md->lock); |
fd539832 KU |
709 | while (ret) |
710 | ret = __blk_end_request(req, -EIO, blk_rq_cur_bytes(req)); | |
1da177e4 LT |
711 | spin_unlock_irq(&md->lock); |
712 | ||
713 | return 0; | |
714 | } | |
715 | ||
bd788c96 AH |
716 | static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) |
717 | { | |
1a258db6 AW |
718 | int ret; |
719 | struct mmc_blk_data *md = mq->data; | |
720 | struct mmc_card *card = md->queue.card; | |
721 | ||
722 | mmc_claim_host(card->host); | |
371a689f AW |
723 | ret = mmc_blk_part_switch(card, md); |
724 | if (ret) { | |
725 | ret = 0; | |
726 | goto out; | |
727 | } | |
1a258db6 | 728 | |
49804548 AH |
729 | if (req->cmd_flags & REQ_DISCARD) { |
730 | if (req->cmd_flags & REQ_SECURE) | |
1a258db6 | 731 | ret = mmc_blk_issue_secdiscard_rq(mq, req); |
49804548 | 732 | else |
1a258db6 | 733 | ret = mmc_blk_issue_discard_rq(mq, req); |
f4c5522b | 734 | } else if (req->cmd_flags & REQ_FLUSH) { |
1a258db6 | 735 | ret = mmc_blk_issue_flush(mq, req); |
49804548 | 736 | } else { |
1a258db6 | 737 | ret = mmc_blk_issue_rw_rq(mq, req); |
49804548 | 738 | } |
1a258db6 | 739 | |
371a689f | 740 | out: |
1a258db6 AW |
741 | mmc_release_host(card->host); |
742 | return ret; | |
bd788c96 | 743 | } |
1da177e4 | 744 | |
a6f6c96b RK |
745 | static inline int mmc_blk_readonly(struct mmc_card *card) |
746 | { | |
747 | return mmc_card_readonly(card) || | |
748 | !(card->csd.cmdclass & CCC_BLOCK_WRITE); | |
749 | } | |
750 | ||
371a689f AW |
751 | static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card, |
752 | struct device *parent, | |
753 | sector_t size, | |
754 | bool default_ro, | |
755 | const char *subname) | |
1da177e4 LT |
756 | { |
757 | struct mmc_blk_data *md; | |
758 | int devidx, ret; | |
759 | ||
5e71b7a6 OJ |
760 | devidx = find_first_zero_bit(dev_use, max_devices); |
761 | if (devidx >= max_devices) | |
1da177e4 LT |
762 | return ERR_PTR(-ENOSPC); |
763 | __set_bit(devidx, dev_use); | |
764 | ||
dd00cc48 | 765 | md = kzalloc(sizeof(struct mmc_blk_data), GFP_KERNEL); |
a6f6c96b RK |
766 | if (!md) { |
767 | ret = -ENOMEM; | |
768 | goto out; | |
769 | } | |
1da177e4 | 770 | |
f06c9153 AW |
771 | /* |
772 | * !subname implies we are creating main mmc_blk_data that will be | |
773 | * associated with mmc_card with mmc_set_drvdata. Due to device | |
774 | * partitions, devidx will not coincide with a per-physical card | |
775 | * index anymore so we keep track of a name index. | |
776 | */ | |
777 | if (!subname) { | |
778 | md->name_idx = find_first_zero_bit(name_use, max_devices); | |
779 | __set_bit(md->name_idx, name_use); | |
780 | } | |
781 | else | |
782 | md->name_idx = ((struct mmc_blk_data *) | |
783 | dev_to_disk(parent)->private_data)->name_idx; | |
784 | ||
a6f6c96b RK |
785 | /* |
786 | * Set the read-only status based on the supported commands | |
787 | * and the write protect switch. | |
788 | */ | |
789 | md->read_only = mmc_blk_readonly(card); | |
1da177e4 | 790 | |
5e71b7a6 | 791 | md->disk = alloc_disk(perdev_minors); |
a6f6c96b RK |
792 | if (md->disk == NULL) { |
793 | ret = -ENOMEM; | |
794 | goto err_kfree; | |
795 | } | |
1da177e4 | 796 | |
a6f6c96b | 797 | spin_lock_init(&md->lock); |
371a689f | 798 | INIT_LIST_HEAD(&md->part); |
a6f6c96b | 799 | md->usage = 1; |
1da177e4 | 800 | |
a6f6c96b RK |
801 | ret = mmc_init_queue(&md->queue, card, &md->lock); |
802 | if (ret) | |
803 | goto err_putdisk; | |
1da177e4 | 804 | |
a6f6c96b RK |
805 | md->queue.issue_fn = mmc_blk_issue_rq; |
806 | md->queue.data = md; | |
d2b18394 | 807 | |
fe6b4c88 | 808 | md->disk->major = MMC_BLOCK_MAJOR; |
5e71b7a6 | 809 | md->disk->first_minor = devidx * perdev_minors; |
a6f6c96b RK |
810 | md->disk->fops = &mmc_bdops; |
811 | md->disk->private_data = md; | |
812 | md->disk->queue = md->queue.queue; | |
371a689f AW |
813 | md->disk->driverfs_dev = parent; |
814 | set_disk_ro(md->disk, md->read_only || default_ro); | |
f4c5522b AW |
815 | if (REL_WRITES_SUPPORTED(card)) |
816 | blk_queue_flush(md->queue.queue, REQ_FLUSH | REQ_FUA); | |
a6f6c96b RK |
817 | |
818 | /* | |
819 | * As discussed on lkml, GENHD_FL_REMOVABLE should: | |
820 | * | |
821 | * - be set for removable media with permanent block devices | |
822 | * - be unset for removable block devices with permanent media | |
823 | * | |
824 | * Since MMC block devices clearly fall under the second | |
825 | * case, we do not set GENHD_FL_REMOVABLE. Userspace | |
826 | * should use the block device creation/destruction hotplug | |
827 | * messages to tell when the card is present. | |
828 | */ | |
829 | ||
f06c9153 AW |
830 | snprintf(md->disk->disk_name, sizeof(md->disk->disk_name), |
831 | "mmcblk%d%s", md->name_idx, subname ? subname : ""); | |
a6f6c96b | 832 | |
e1defc4f | 833 | blk_queue_logical_block_size(md->queue.queue, 512); |
371a689f AW |
834 | set_capacity(md->disk, size); |
835 | return md; | |
836 | ||
837 | err_putdisk: | |
838 | put_disk(md->disk); | |
839 | err_kfree: | |
840 | kfree(md); | |
841 | out: | |
842 | return ERR_PTR(ret); | |
843 | } | |
844 | ||
845 | static struct mmc_blk_data *mmc_blk_alloc(struct mmc_card *card) | |
846 | { | |
847 | sector_t size; | |
848 | struct mmc_blk_data *md; | |
a6f6c96b | 849 | |
85a18ad9 PO |
850 | if (!mmc_card_sd(card) && mmc_card_blockaddr(card)) { |
851 | /* | |
852 | * The EXT_CSD sector count is in number or 512 byte | |
853 | * sectors. | |
854 | */ | |
371a689f | 855 | size = card->ext_csd.sectors; |
85a18ad9 PO |
856 | } else { |
857 | /* | |
858 | * The CSD capacity field is in units of read_blkbits. | |
859 | * set_capacity takes units of 512 bytes. | |
860 | */ | |
371a689f | 861 | size = card->csd.capacity << (card->csd.read_blkbits - 9); |
85a18ad9 | 862 | } |
371a689f AW |
863 | |
864 | md = mmc_blk_alloc_req(card, &card->dev, size, false, NULL); | |
1da177e4 | 865 | return md; |
371a689f | 866 | } |
a6f6c96b | 867 | |
371a689f AW |
868 | static int mmc_blk_alloc_part(struct mmc_card *card, |
869 | struct mmc_blk_data *md, | |
870 | unsigned int part_type, | |
871 | sector_t size, | |
872 | bool default_ro, | |
873 | const char *subname) | |
874 | { | |
875 | char cap_str[10]; | |
876 | struct mmc_blk_data *part_md; | |
877 | ||
878 | part_md = mmc_blk_alloc_req(card, disk_to_dev(md->disk), size, default_ro, | |
879 | subname); | |
880 | if (IS_ERR(part_md)) | |
881 | return PTR_ERR(part_md); | |
882 | part_md->part_type = part_type; | |
883 | list_add(&part_md->part, &md->part); | |
884 | ||
885 | string_get_size((u64)get_capacity(part_md->disk) << 9, STRING_UNITS_2, | |
886 | cap_str, sizeof(cap_str)); | |
887 | printk(KERN_INFO "%s: %s %s partition %u %s\n", | |
888 | part_md->disk->disk_name, mmc_card_id(card), | |
889 | mmc_card_name(card), part_md->part_type, cap_str); | |
890 | return 0; | |
891 | } | |
892 | ||
893 | static int mmc_blk_alloc_parts(struct mmc_card *card, struct mmc_blk_data *md) | |
894 | { | |
895 | int ret = 0; | |
896 | ||
897 | if (!mmc_card_mmc(card)) | |
898 | return 0; | |
899 | ||
900 | if (card->ext_csd.boot_size) { | |
901 | ret = mmc_blk_alloc_part(card, md, EXT_CSD_PART_CONFIG_ACC_BOOT0, | |
902 | card->ext_csd.boot_size >> 9, | |
903 | true, | |
904 | "boot0"); | |
905 | if (ret) | |
906 | return ret; | |
907 | ret = mmc_blk_alloc_part(card, md, EXT_CSD_PART_CONFIG_ACC_BOOT1, | |
908 | card->ext_csd.boot_size >> 9, | |
909 | true, | |
910 | "boot1"); | |
911 | if (ret) | |
912 | return ret; | |
913 | } | |
914 | ||
915 | return ret; | |
1da177e4 LT |
916 | } |
917 | ||
918 | static int | |
919 | mmc_blk_set_blksize(struct mmc_blk_data *md, struct mmc_card *card) | |
920 | { | |
1da177e4 LT |
921 | int err; |
922 | ||
b855885e | 923 | mmc_claim_host(card->host); |
0f8d8ea6 | 924 | err = mmc_set_blocklen(card, 512); |
b855885e | 925 | mmc_release_host(card->host); |
1da177e4 LT |
926 | |
927 | if (err) { | |
0f8d8ea6 AH |
928 | printk(KERN_ERR "%s: unable to set block size to 512: %d\n", |
929 | md->disk->disk_name, err); | |
1da177e4 LT |
930 | return -EINVAL; |
931 | } | |
932 | ||
933 | return 0; | |
934 | } | |
935 | ||
371a689f AW |
936 | static void mmc_blk_remove_req(struct mmc_blk_data *md) |
937 | { | |
938 | if (md) { | |
939 | if (md->disk->flags & GENHD_FL_UP) { | |
940 | device_remove_file(disk_to_dev(md->disk), &md->force_ro); | |
941 | ||
942 | /* Stop new requests from getting into the queue */ | |
943 | del_gendisk(md->disk); | |
944 | } | |
945 | ||
946 | /* Then flush out any already in there */ | |
947 | mmc_cleanup_queue(&md->queue); | |
948 | mmc_blk_put(md); | |
949 | } | |
950 | } | |
951 | ||
952 | static void mmc_blk_remove_parts(struct mmc_card *card, | |
953 | struct mmc_blk_data *md) | |
954 | { | |
955 | struct list_head *pos, *q; | |
956 | struct mmc_blk_data *part_md; | |
957 | ||
f06c9153 | 958 | __clear_bit(md->name_idx, name_use); |
371a689f AW |
959 | list_for_each_safe(pos, q, &md->part) { |
960 | part_md = list_entry(pos, struct mmc_blk_data, part); | |
961 | list_del(pos); | |
962 | mmc_blk_remove_req(part_md); | |
963 | } | |
964 | } | |
965 | ||
966 | static int mmc_add_disk(struct mmc_blk_data *md) | |
967 | { | |
968 | int ret; | |
969 | ||
970 | add_disk(md->disk); | |
971 | md->force_ro.show = force_ro_show; | |
972 | md->force_ro.store = force_ro_store; | |
641c3187 | 973 | sysfs_attr_init(&md->force_ro.attr); |
371a689f AW |
974 | md->force_ro.attr.name = "force_ro"; |
975 | md->force_ro.attr.mode = S_IRUGO | S_IWUSR; | |
976 | ret = device_create_file(disk_to_dev(md->disk), &md->force_ro); | |
977 | if (ret) | |
978 | del_gendisk(md->disk); | |
979 | ||
980 | return ret; | |
981 | } | |
982 | ||
6f60c222 AW |
983 | static const struct mmc_fixup blk_fixups[] = |
984 | { | |
6a7a6b45 AW |
985 | MMC_FIXUP("SEM02G", 0x2, 0x100, add_quirk, MMC_QUIRK_INAND_CMD38), |
986 | MMC_FIXUP("SEM04G", 0x2, 0x100, add_quirk, MMC_QUIRK_INAND_CMD38), | |
987 | MMC_FIXUP("SEM08G", 0x2, 0x100, add_quirk, MMC_QUIRK_INAND_CMD38), | |
988 | MMC_FIXUP("SEM16G", 0x2, 0x100, add_quirk, MMC_QUIRK_INAND_CMD38), | |
989 | MMC_FIXUP("SEM32G", 0x2, 0x100, add_quirk, MMC_QUIRK_INAND_CMD38), | |
6f60c222 AW |
990 | END_FIXUP |
991 | }; | |
992 | ||
1da177e4 LT |
993 | static int mmc_blk_probe(struct mmc_card *card) |
994 | { | |
371a689f | 995 | struct mmc_blk_data *md, *part_md; |
1da177e4 | 996 | int err; |
a7bbb573 PO |
997 | char cap_str[10]; |
998 | ||
912490db PO |
999 | /* |
1000 | * Check that the card supports the command class(es) we need. | |
1001 | */ | |
1002 | if (!(card->csd.cmdclass & CCC_BLOCK_READ)) | |
1da177e4 LT |
1003 | return -ENODEV; |
1004 | ||
1da177e4 LT |
1005 | md = mmc_blk_alloc(card); |
1006 | if (IS_ERR(md)) | |
1007 | return PTR_ERR(md); | |
1008 | ||
1009 | err = mmc_blk_set_blksize(md, card); | |
1010 | if (err) | |
1011 | goto out; | |
1012 | ||
444122fd | 1013 | string_get_size((u64)get_capacity(md->disk) << 9, STRING_UNITS_2, |
a7bbb573 PO |
1014 | cap_str, sizeof(cap_str)); |
1015 | printk(KERN_INFO "%s: %s %s %s %s\n", | |
1da177e4 | 1016 | md->disk->disk_name, mmc_card_id(card), mmc_card_name(card), |
a7bbb573 | 1017 | cap_str, md->read_only ? "(ro)" : ""); |
1da177e4 | 1018 | |
371a689f AW |
1019 | if (mmc_blk_alloc_parts(card, md)) |
1020 | goto out; | |
1021 | ||
1da177e4 | 1022 | mmc_set_drvdata(card, md); |
6f60c222 AW |
1023 | mmc_fixup_device(card, blk_fixups); |
1024 | ||
371a689f AW |
1025 | if (mmc_add_disk(md)) |
1026 | goto out; | |
1027 | ||
1028 | list_for_each_entry(part_md, &md->part, part) { | |
1029 | if (mmc_add_disk(part_md)) | |
1030 | goto out; | |
1031 | } | |
1da177e4 LT |
1032 | return 0; |
1033 | ||
1034 | out: | |
371a689f AW |
1035 | mmc_blk_remove_parts(card, md); |
1036 | mmc_blk_remove_req(md); | |
1da177e4 LT |
1037 | return err; |
1038 | } | |
1039 | ||
1040 | static void mmc_blk_remove(struct mmc_card *card) | |
1041 | { | |
1042 | struct mmc_blk_data *md = mmc_get_drvdata(card); | |
1043 | ||
371a689f AW |
1044 | mmc_blk_remove_parts(card, md); |
1045 | mmc_blk_remove_req(md); | |
1da177e4 LT |
1046 | mmc_set_drvdata(card, NULL); |
1047 | } | |
1048 | ||
1049 | #ifdef CONFIG_PM | |
1050 | static int mmc_blk_suspend(struct mmc_card *card, pm_message_t state) | |
1051 | { | |
371a689f | 1052 | struct mmc_blk_data *part_md; |
1da177e4 LT |
1053 | struct mmc_blk_data *md = mmc_get_drvdata(card); |
1054 | ||
1055 | if (md) { | |
1056 | mmc_queue_suspend(&md->queue); | |
371a689f AW |
1057 | list_for_each_entry(part_md, &md->part, part) { |
1058 | mmc_queue_suspend(&part_md->queue); | |
1059 | } | |
1da177e4 LT |
1060 | } |
1061 | return 0; | |
1062 | } | |
1063 | ||
1064 | static int mmc_blk_resume(struct mmc_card *card) | |
1065 | { | |
371a689f | 1066 | struct mmc_blk_data *part_md; |
1da177e4 LT |
1067 | struct mmc_blk_data *md = mmc_get_drvdata(card); |
1068 | ||
1069 | if (md) { | |
1070 | mmc_blk_set_blksize(md, card); | |
371a689f AW |
1071 | |
1072 | /* | |
1073 | * Resume involves the card going into idle state, | |
1074 | * so current partition is always the main one. | |
1075 | */ | |
1076 | md->part_curr = md->part_type; | |
1da177e4 | 1077 | mmc_queue_resume(&md->queue); |
371a689f AW |
1078 | list_for_each_entry(part_md, &md->part, part) { |
1079 | mmc_queue_resume(&part_md->queue); | |
1080 | } | |
1da177e4 LT |
1081 | } |
1082 | return 0; | |
1083 | } | |
1084 | #else | |
1085 | #define mmc_blk_suspend NULL | |
1086 | #define mmc_blk_resume NULL | |
1087 | #endif | |
1088 | ||
1089 | static struct mmc_driver mmc_driver = { | |
1090 | .drv = { | |
1091 | .name = "mmcblk", | |
1092 | }, | |
1093 | .probe = mmc_blk_probe, | |
1094 | .remove = mmc_blk_remove, | |
1095 | .suspend = mmc_blk_suspend, | |
1096 | .resume = mmc_blk_resume, | |
1097 | }; | |
1098 | ||
1099 | static int __init mmc_blk_init(void) | |
1100 | { | |
9d4e98e9 | 1101 | int res; |
1da177e4 | 1102 | |
5e71b7a6 OJ |
1103 | if (perdev_minors != CONFIG_MMC_BLOCK_MINORS) |
1104 | pr_info("mmcblk: using %d minors per device\n", perdev_minors); | |
1105 | ||
1106 | max_devices = 256 / perdev_minors; | |
1107 | ||
fe6b4c88 PO |
1108 | res = register_blkdev(MMC_BLOCK_MAJOR, "mmc"); |
1109 | if (res) | |
1da177e4 | 1110 | goto out; |
1da177e4 | 1111 | |
9d4e98e9 AM |
1112 | res = mmc_register_driver(&mmc_driver); |
1113 | if (res) | |
1114 | goto out2; | |
1da177e4 | 1115 | |
9d4e98e9 AM |
1116 | return 0; |
1117 | out2: | |
1118 | unregister_blkdev(MMC_BLOCK_MAJOR, "mmc"); | |
1da177e4 LT |
1119 | out: |
1120 | return res; | |
1121 | } | |
1122 | ||
1123 | static void __exit mmc_blk_exit(void) | |
1124 | { | |
1125 | mmc_unregister_driver(&mmc_driver); | |
fe6b4c88 | 1126 | unregister_blkdev(MMC_BLOCK_MAJOR, "mmc"); |
1da177e4 LT |
1127 | } |
1128 | ||
1129 | module_init(mmc_blk_init); | |
1130 | module_exit(mmc_blk_exit); | |
1131 | ||
1132 | MODULE_LICENSE("GPL"); | |
1133 | MODULE_DESCRIPTION("Multimedia Card (MMC) block device driver"); | |
1134 |