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494a43bb AO |
1 | /* |
2 | * NAND Flash Controller Device Driver | |
3 | * Copyright (c) 2009, Intel Corporation and its suppliers. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
17 | * | |
18 | */ | |
19 | ||
20 | #include "ffsport.h" | |
21 | #include "flash.h" | |
22 | #include <linux/interrupt.h> | |
23 | #include <linux/delay.h> | |
24 | #include <linux/blkdev.h> | |
25 | #include <linux/wait.h> | |
26 | #include <linux/mutex.h> | |
27 | #include <linux/kthread.h> | |
28 | #include <linux/log2.h> | |
29 | #include <linux/init.h> | |
f8d261d3 | 30 | #include <linux/slab.h> |
63fcf10d | 31 | #include <linux/async.h> |
494a43bb AO |
32 | |
33 | /**** Helper functions used for Div, Remainder operation on u64 ****/ | |
34 | ||
35 | /*&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&& | |
36 | * Function: GLOB_Calc_Used_Bits | |
37 | * Inputs: Power of 2 number | |
38 | * Outputs: Number of Used Bits | |
39 | * 0, if the argument is 0 | |
40 | * Description: Calculate the number of bits used by a given power of 2 number | |
25985edc | 41 | * Number can be up to 32 bit |
494a43bb AO |
42 | *&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&*/ |
43 | int GLOB_Calc_Used_Bits(u32 n) | |
44 | { | |
45 | int tot_bits = 0; | |
46 | ||
47 | if (n >= 1 << 16) { | |
48 | n >>= 16; | |
49 | tot_bits += 16; | |
50 | } | |
51 | ||
52 | if (n >= 1 << 8) { | |
53 | n >>= 8; | |
54 | tot_bits += 8; | |
55 | } | |
56 | ||
57 | if (n >= 1 << 4) { | |
58 | n >>= 4; | |
59 | tot_bits += 4; | |
60 | } | |
61 | ||
62 | if (n >= 1 << 2) { | |
63 | n >>= 2; | |
64 | tot_bits += 2; | |
65 | } | |
66 | ||
67 | if (n >= 1 << 1) | |
68 | tot_bits += 1; | |
69 | ||
70 | return ((n == 0) ? (0) : tot_bits); | |
71 | } | |
72 | ||
73 | /*&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&& | |
74 | * Function: GLOB_u64_Div | |
75 | * Inputs: Number of u64 | |
76 | * A power of 2 number as Division | |
77 | * Outputs: Quotient of the Divisor operation | |
78 | * Description: It divides the address by divisor by using bit shift operation | |
79 | * (essentially without explicitely using "/"). | |
80 | * Divisor is a power of 2 number and Divided is of u64 | |
81 | *&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&*/ | |
82 | u64 GLOB_u64_Div(u64 addr, u32 divisor) | |
83 | { | |
84 | return (u64)(addr >> GLOB_Calc_Used_Bits(divisor)); | |
85 | } | |
86 | ||
87 | /*&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&& | |
88 | * Function: GLOB_u64_Remainder | |
89 | * Inputs: Number of u64 | |
90 | * Divisor Type (1 -PageAddress, 2- BlockAddress) | |
91 | * Outputs: Remainder of the Division operation | |
92 | * Description: It calculates the remainder of a number (of u64) by | |
93 | * divisor(power of 2 number ) by using bit shifting and multiply | |
94 | * operation(essentially without explicitely using "/"). | |
95 | *&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&*/ | |
96 | u64 GLOB_u64_Remainder(u64 addr, u32 divisor_type) | |
97 | { | |
98 | u64 result = 0; | |
99 | ||
100 | if (divisor_type == 1) { /* Remainder -- Page */ | |
101 | result = (addr >> DeviceInfo.nBitsInPageDataSize); | |
102 | result = result * DeviceInfo.wPageDataSize; | |
103 | } else if (divisor_type == 2) { /* Remainder -- Block */ | |
104 | result = (addr >> DeviceInfo.nBitsInBlockDataSize); | |
105 | result = result * DeviceInfo.wBlockDataSize; | |
106 | } | |
107 | ||
108 | result = addr - result; | |
109 | ||
110 | return result; | |
111 | } | |
112 | ||
113 | #define NUM_DEVICES 1 | |
114 | #define PARTITIONS 8 | |
115 | ||
116 | #define GLOB_SBD_NAME "nd" | |
117 | #define GLOB_SBD_IRQ_NUM (29) | |
494a43bb AO |
118 | |
119 | #define GLOB_SBD_IOCTL_GC (0x7701) | |
120 | #define GLOB_SBD_IOCTL_WL (0x7702) | |
121 | #define GLOB_SBD_IOCTL_FORMAT (0x7703) | |
122 | #define GLOB_SBD_IOCTL_ERASE_FLASH (0x7704) | |
123 | #define GLOB_SBD_IOCTL_FLUSH_CACHE (0x7705) | |
124 | #define GLOB_SBD_IOCTL_COPY_BLK_TABLE (0x7706) | |
125 | #define GLOB_SBD_IOCTL_COPY_WEAR_LEVELING_TABLE (0x7707) | |
126 | #define GLOB_SBD_IOCTL_GET_NAND_INFO (0x7708) | |
127 | #define GLOB_SBD_IOCTL_WRITE_DATA (0x7709) | |
128 | #define GLOB_SBD_IOCTL_READ_DATA (0x770A) | |
129 | ||
90d59828 DW |
130 | static int reserved_mb = 0; |
131 | module_param(reserved_mb, int, 0); | |
132 | MODULE_PARM_DESC(reserved_mb, "Reserved space for OS image, in MiB (default 25 MiB)"); | |
494a43bb AO |
133 | |
134 | int nand_debug_level; | |
135 | module_param(nand_debug_level, int, 0644); | |
136 | MODULE_PARM_DESC(nand_debug_level, "debug level value: 1-3"); | |
137 | ||
138 | MODULE_LICENSE("GPL"); | |
139 | ||
140 | struct spectra_nand_dev { | |
141 | struct pci_dev *dev; | |
142 | u64 size; | |
143 | u16 users; | |
144 | spinlock_t qlock; | |
145 | void __iomem *ioaddr; /* Mapped address */ | |
146 | struct request_queue *queue; | |
147 | struct task_struct *thread; | |
148 | struct gendisk *gd; | |
149 | u8 *tmp_buf; | |
150 | }; | |
151 | ||
152 | ||
153 | static int GLOB_SBD_majornum; | |
154 | ||
155 | static char *GLOB_version = GLOB_VERSION; | |
156 | ||
157 | static struct spectra_nand_dev nand_device[NUM_DEVICES]; | |
158 | ||
159 | static struct mutex spectra_lock; | |
160 | ||
161 | static int res_blks_os = 1; | |
162 | ||
163 | struct spectra_indentfy_dev_tag IdentifyDeviceData; | |
164 | ||
165 | static int force_flush_cache(void) | |
166 | { | |
167 | nand_dbg_print(NAND_DBG_DEBUG, "%s, Line %d, Function: %s\n", | |
168 | __FILE__, __LINE__, __func__); | |
169 | ||
170 | if (ERR == GLOB_FTL_Flush_Cache()) { | |
171 | printk(KERN_ERR "Fail to Flush FTL Cache!\n"); | |
172 | return -EFAULT; | |
173 | } | |
174 | #if CMD_DMA | |
175 | if (glob_ftl_execute_cmds()) | |
176 | return -EIO; | |
177 | else | |
178 | return 0; | |
179 | #endif | |
180 | return 0; | |
181 | } | |
182 | ||
183 | struct ioctl_rw_page_info { | |
184 | u8 *data; | |
185 | unsigned int page; | |
186 | }; | |
187 | ||
188 | static int ioctl_read_page_data(unsigned long arg) | |
189 | { | |
190 | u8 *buf; | |
191 | struct ioctl_rw_page_info info; | |
192 | int result = PASS; | |
193 | ||
194 | if (copy_from_user(&info, (void __user *)arg, sizeof(info))) | |
195 | return -EFAULT; | |
196 | ||
197 | buf = kmalloc(IdentifyDeviceData.PageDataSize, GFP_ATOMIC); | |
198 | if (!buf) { | |
199 | printk(KERN_ERR "ioctl_read_page_data: " | |
200 | "failed to allocate memory\n"); | |
201 | return -ENOMEM; | |
202 | } | |
203 | ||
204 | mutex_lock(&spectra_lock); | |
205 | result = GLOB_FTL_Page_Read(buf, | |
206 | (u64)info.page * IdentifyDeviceData.PageDataSize); | |
207 | mutex_unlock(&spectra_lock); | |
208 | ||
209 | if (copy_to_user((void __user *)info.data, buf, | |
210 | IdentifyDeviceData.PageDataSize)) { | |
211 | printk(KERN_ERR "ioctl_read_page_data: " | |
212 | "failed to copy user data\n"); | |
213 | kfree(buf); | |
214 | return -EFAULT; | |
215 | } | |
216 | ||
217 | kfree(buf); | |
218 | return result; | |
219 | } | |
220 | ||
221 | static int ioctl_write_page_data(unsigned long arg) | |
222 | { | |
223 | u8 *buf; | |
224 | struct ioctl_rw_page_info info; | |
225 | int result = PASS; | |
226 | ||
227 | if (copy_from_user(&info, (void __user *)arg, sizeof(info))) | |
228 | return -EFAULT; | |
229 | ||
230 | buf = kmalloc(IdentifyDeviceData.PageDataSize, GFP_ATOMIC); | |
231 | if (!buf) { | |
232 | printk(KERN_ERR "ioctl_write_page_data: " | |
233 | "failed to allocate memory\n"); | |
234 | return -ENOMEM; | |
235 | } | |
236 | ||
237 | if (copy_from_user(buf, (void __user *)info.data, | |
238 | IdentifyDeviceData.PageDataSize)) { | |
239 | printk(KERN_ERR "ioctl_write_page_data: " | |
240 | "failed to copy user data\n"); | |
241 | kfree(buf); | |
242 | return -EFAULT; | |
243 | } | |
244 | ||
245 | mutex_lock(&spectra_lock); | |
246 | result = GLOB_FTL_Page_Write(buf, | |
247 | (u64)info.page * IdentifyDeviceData.PageDataSize); | |
248 | mutex_unlock(&spectra_lock); | |
249 | ||
250 | kfree(buf); | |
251 | return result; | |
252 | } | |
253 | ||
254 | /* Return how many blocks should be reserved for bad block replacement */ | |
255 | static int get_res_blk_num_bad_blk(void) | |
256 | { | |
257 | return IdentifyDeviceData.wDataBlockNum / 10; | |
258 | } | |
259 | ||
260 | /* Return how many blocks should be reserved for OS image */ | |
261 | static int get_res_blk_num_os(void) | |
262 | { | |
263 | u32 res_blks, blk_size; | |
264 | ||
265 | blk_size = IdentifyDeviceData.PageDataSize * | |
266 | IdentifyDeviceData.PagesPerBlock; | |
267 | ||
90d59828 | 268 | res_blks = (reserved_mb * 1024 * 1024) / blk_size; |
494a43bb AO |
269 | |
270 | if ((res_blks < 1) || (res_blks >= IdentifyDeviceData.wDataBlockNum)) | |
271 | res_blks = 1; /* Reserved 1 block for block table */ | |
272 | ||
273 | return res_blks; | |
274 | } | |
275 | ||
494a43bb AO |
276 | /* Transfer a full request. */ |
277 | static int do_transfer(struct spectra_nand_dev *tr, struct request *req) | |
278 | { | |
279 | u64 start_addr, addr; | |
280 | u32 logical_start_sect, hd_start_sect; | |
281 | u32 nsect, hd_sects; | |
282 | u32 rsect, tsect = 0; | |
283 | char *buf; | |
284 | u32 ratio = IdentifyDeviceData.PageDataSize >> 9; | |
285 | ||
286 | start_addr = (u64)(blk_rq_pos(req)) << 9; | |
287 | /* Add a big enough offset to prevent the OS Image from | |
288 | * being accessed or damaged by file system */ | |
289 | start_addr += IdentifyDeviceData.PageDataSize * | |
290 | IdentifyDeviceData.PagesPerBlock * | |
291 | res_blks_os; | |
292 | ||
7b633f66 | 293 | if (req->cmd_type & REQ_FLUSH) { |
494a43bb AO |
294 | if (force_flush_cache()) /* Fail to flush cache */ |
295 | return -EIO; | |
296 | else | |
297 | return 0; | |
298 | } | |
299 | ||
eeba34d9 | 300 | if (req->cmd_type != REQ_TYPE_FS) |
494a43bb AO |
301 | return -EIO; |
302 | ||
303 | if (blk_rq_pos(req) + blk_rq_cur_sectors(req) > get_capacity(tr->gd)) { | |
304 | printk(KERN_ERR "Spectra error: request over the NAND " | |
305 | "capacity!sector %d, current_nr_sectors %d, " | |
306 | "while capacity is %d\n", | |
307 | (int)blk_rq_pos(req), | |
308 | blk_rq_cur_sectors(req), | |
309 | (int)get_capacity(tr->gd)); | |
310 | return -EIO; | |
311 | } | |
312 | ||
313 | logical_start_sect = start_addr >> 9; | |
314 | hd_start_sect = logical_start_sect / ratio; | |
315 | rsect = logical_start_sect - hd_start_sect * ratio; | |
316 | ||
317 | addr = (u64)hd_start_sect * ratio * 512; | |
318 | buf = req->buffer; | |
319 | nsect = blk_rq_cur_sectors(req); | |
320 | ||
321 | if (rsect) | |
322 | tsect = (ratio - rsect) < nsect ? (ratio - rsect) : nsect; | |
323 | ||
324 | switch (rq_data_dir(req)) { | |
325 | case READ: | |
326 | /* Read the first NAND page */ | |
327 | if (rsect) { | |
328 | if (GLOB_FTL_Page_Read(tr->tmp_buf, addr)) { | |
329 | printk(KERN_ERR "Error in %s, Line %d\n", | |
330 | __FILE__, __LINE__); | |
331 | return -EIO; | |
332 | } | |
333 | memcpy(buf, tr->tmp_buf + (rsect << 9), tsect << 9); | |
334 | addr += IdentifyDeviceData.PageDataSize; | |
335 | buf += tsect << 9; | |
336 | nsect -= tsect; | |
337 | } | |
338 | ||
339 | /* Read the other NAND pages */ | |
340 | for (hd_sects = nsect / ratio; hd_sects > 0; hd_sects--) { | |
341 | if (GLOB_FTL_Page_Read(buf, addr)) { | |
342 | printk(KERN_ERR "Error in %s, Line %d\n", | |
343 | __FILE__, __LINE__); | |
344 | return -EIO; | |
345 | } | |
346 | addr += IdentifyDeviceData.PageDataSize; | |
347 | buf += IdentifyDeviceData.PageDataSize; | |
348 | } | |
349 | ||
350 | /* Read the last NAND pages */ | |
351 | if (nsect % ratio) { | |
352 | if (GLOB_FTL_Page_Read(tr->tmp_buf, addr)) { | |
353 | printk(KERN_ERR "Error in %s, Line %d\n", | |
354 | __FILE__, __LINE__); | |
355 | return -EIO; | |
356 | } | |
357 | memcpy(buf, tr->tmp_buf, (nsect % ratio) << 9); | |
358 | } | |
359 | #if CMD_DMA | |
360 | if (glob_ftl_execute_cmds()) | |
361 | return -EIO; | |
362 | else | |
363 | return 0; | |
364 | #endif | |
365 | return 0; | |
366 | ||
367 | case WRITE: | |
368 | /* Write the first NAND page */ | |
369 | if (rsect) { | |
370 | if (GLOB_FTL_Page_Read(tr->tmp_buf, addr)) { | |
371 | printk(KERN_ERR "Error in %s, Line %d\n", | |
372 | __FILE__, __LINE__); | |
373 | return -EIO; | |
374 | } | |
375 | memcpy(tr->tmp_buf + (rsect << 9), buf, tsect << 9); | |
376 | if (GLOB_FTL_Page_Write(tr->tmp_buf, addr)) { | |
377 | printk(KERN_ERR "Error in %s, Line %d\n", | |
378 | __FILE__, __LINE__); | |
379 | return -EIO; | |
380 | } | |
381 | addr += IdentifyDeviceData.PageDataSize; | |
382 | buf += tsect << 9; | |
383 | nsect -= tsect; | |
384 | } | |
385 | ||
386 | /* Write the other NAND pages */ | |
387 | for (hd_sects = nsect / ratio; hd_sects > 0; hd_sects--) { | |
388 | if (GLOB_FTL_Page_Write(buf, addr)) { | |
389 | printk(KERN_ERR "Error in %s, Line %d\n", | |
390 | __FILE__, __LINE__); | |
391 | return -EIO; | |
392 | } | |
393 | addr += IdentifyDeviceData.PageDataSize; | |
394 | buf += IdentifyDeviceData.PageDataSize; | |
395 | } | |
396 | ||
397 | /* Write the last NAND pages */ | |
398 | if (nsect % ratio) { | |
399 | if (GLOB_FTL_Page_Read(tr->tmp_buf, addr)) { | |
400 | printk(KERN_ERR "Error in %s, Line %d\n", | |
401 | __FILE__, __LINE__); | |
402 | return -EIO; | |
403 | } | |
404 | memcpy(tr->tmp_buf, buf, (nsect % ratio) << 9); | |
405 | if (GLOB_FTL_Page_Write(tr->tmp_buf, addr)) { | |
406 | printk(KERN_ERR "Error in %s, Line %d\n", | |
407 | __FILE__, __LINE__); | |
408 | return -EIO; | |
409 | } | |
410 | } | |
411 | #if CMD_DMA | |
412 | if (glob_ftl_execute_cmds()) | |
413 | return -EIO; | |
414 | else | |
415 | return 0; | |
416 | #endif | |
417 | return 0; | |
418 | ||
419 | default: | |
420 | printk(KERN_NOTICE "Unknown request %u\n", rq_data_dir(req)); | |
421 | return -EIO; | |
422 | } | |
423 | } | |
424 | ||
425 | /* This function is copied from drivers/mtd/mtd_blkdevs.c */ | |
426 | static int spectra_trans_thread(void *arg) | |
427 | { | |
428 | struct spectra_nand_dev *tr = arg; | |
429 | struct request_queue *rq = tr->queue; | |
430 | struct request *req = NULL; | |
431 | ||
432 | /* we might get involved when memory gets low, so use PF_MEMALLOC */ | |
433 | current->flags |= PF_MEMALLOC; | |
434 | ||
435 | spin_lock_irq(rq->queue_lock); | |
436 | while (!kthread_should_stop()) { | |
437 | int res; | |
438 | ||
439 | if (!req) { | |
440 | req = blk_fetch_request(rq); | |
441 | if (!req) { | |
442 | set_current_state(TASK_INTERRUPTIBLE); | |
443 | spin_unlock_irq(rq->queue_lock); | |
444 | schedule(); | |
445 | spin_lock_irq(rq->queue_lock); | |
446 | continue; | |
447 | } | |
448 | } | |
449 | ||
450 | spin_unlock_irq(rq->queue_lock); | |
451 | ||
452 | mutex_lock(&spectra_lock); | |
453 | res = do_transfer(tr, req); | |
454 | mutex_unlock(&spectra_lock); | |
455 | ||
456 | spin_lock_irq(rq->queue_lock); | |
457 | ||
458 | if (!__blk_end_request_cur(req, res)) | |
459 | req = NULL; | |
460 | } | |
461 | ||
462 | if (req) | |
463 | __blk_end_request_all(req, -EIO); | |
464 | ||
465 | spin_unlock_irq(rq->queue_lock); | |
466 | ||
467 | return 0; | |
468 | } | |
469 | ||
470 | ||
471 | /* Request function that "handles clustering". */ | |
472 | static void GLOB_SBD_request(struct request_queue *rq) | |
473 | { | |
474 | struct spectra_nand_dev *pdev = rq->queuedata; | |
475 | wake_up_process(pdev->thread); | |
476 | } | |
477 | ||
478 | static int GLOB_SBD_open(struct block_device *bdev, fmode_t mode) | |
479 | ||
480 | { | |
481 | nand_dbg_print(NAND_DBG_WARN, "%s, Line %d, Function: %s\n", | |
482 | __FILE__, __LINE__, __func__); | |
483 | return 0; | |
484 | } | |
485 | ||
486 | static int GLOB_SBD_release(struct gendisk *disk, fmode_t mode) | |
487 | { | |
488 | int ret; | |
489 | ||
490 | nand_dbg_print(NAND_DBG_WARN, "%s, Line %d, Function: %s\n", | |
491 | __FILE__, __LINE__, __func__); | |
492 | ||
493 | mutex_lock(&spectra_lock); | |
494 | ret = force_flush_cache(); | |
495 | mutex_unlock(&spectra_lock); | |
496 | ||
497 | return 0; | |
498 | } | |
499 | ||
500 | static int GLOB_SBD_getgeo(struct block_device *bdev, struct hd_geometry *geo) | |
501 | { | |
502 | geo->heads = 4; | |
503 | geo->sectors = 16; | |
504 | geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16); | |
505 | ||
506 | nand_dbg_print(NAND_DBG_DEBUG, | |
507 | "heads: %d, sectors: %d, cylinders: %d\n", | |
508 | geo->heads, geo->sectors, geo->cylinders); | |
509 | ||
510 | return 0; | |
511 | } | |
512 | ||
513 | int GLOB_SBD_ioctl(struct block_device *bdev, fmode_t mode, | |
514 | unsigned int cmd, unsigned long arg) | |
515 | { | |
516 | int ret; | |
517 | ||
518 | nand_dbg_print(NAND_DBG_TRACE, "%s, Line %d, Function: %s\n", | |
519 | __FILE__, __LINE__, __func__); | |
520 | ||
521 | switch (cmd) { | |
522 | case GLOB_SBD_IOCTL_GC: | |
523 | nand_dbg_print(NAND_DBG_DEBUG, | |
524 | "Spectra IOCTL: Garbage Collection " | |
525 | "being performed\n"); | |
526 | if (PASS != GLOB_FTL_Garbage_Collection()) | |
527 | return -EFAULT; | |
528 | return 0; | |
529 | ||
530 | case GLOB_SBD_IOCTL_WL: | |
531 | nand_dbg_print(NAND_DBG_DEBUG, | |
532 | "Spectra IOCTL: Static Wear Leveling " | |
533 | "being performed\n"); | |
534 | if (PASS != GLOB_FTL_Wear_Leveling()) | |
535 | return -EFAULT; | |
536 | return 0; | |
537 | ||
538 | case GLOB_SBD_IOCTL_FORMAT: | |
539 | nand_dbg_print(NAND_DBG_DEBUG, "Spectra IOCTL: Flash format " | |
540 | "being performed\n"); | |
541 | if (PASS != GLOB_FTL_Flash_Format()) | |
542 | return -EFAULT; | |
543 | return 0; | |
544 | ||
545 | case GLOB_SBD_IOCTL_FLUSH_CACHE: | |
546 | nand_dbg_print(NAND_DBG_DEBUG, "Spectra IOCTL: Cache flush " | |
547 | "being performed\n"); | |
548 | mutex_lock(&spectra_lock); | |
549 | ret = force_flush_cache(); | |
550 | mutex_unlock(&spectra_lock); | |
551 | return ret; | |
552 | ||
553 | case GLOB_SBD_IOCTL_COPY_BLK_TABLE: | |
554 | nand_dbg_print(NAND_DBG_DEBUG, "Spectra IOCTL: " | |
555 | "Copy block table\n"); | |
556 | if (copy_to_user((void __user *)arg, | |
557 | get_blk_table_start_addr(), | |
558 | get_blk_table_len())) | |
559 | return -EFAULT; | |
560 | return 0; | |
561 | ||
562 | case GLOB_SBD_IOCTL_COPY_WEAR_LEVELING_TABLE: | |
563 | nand_dbg_print(NAND_DBG_DEBUG, "Spectra IOCTL: " | |
564 | "Copy wear leveling table\n"); | |
565 | if (copy_to_user((void __user *)arg, | |
566 | get_wear_leveling_table_start_addr(), | |
567 | get_wear_leveling_table_len())) | |
568 | return -EFAULT; | |
569 | return 0; | |
570 | ||
571 | case GLOB_SBD_IOCTL_GET_NAND_INFO: | |
572 | nand_dbg_print(NAND_DBG_DEBUG, "Spectra IOCTL: " | |
573 | "Get NAND info\n"); | |
574 | if (copy_to_user((void __user *)arg, &IdentifyDeviceData, | |
575 | sizeof(IdentifyDeviceData))) | |
576 | return -EFAULT; | |
577 | return 0; | |
578 | ||
579 | case GLOB_SBD_IOCTL_WRITE_DATA: | |
580 | nand_dbg_print(NAND_DBG_DEBUG, "Spectra IOCTL: " | |
581 | "Write one page data\n"); | |
582 | return ioctl_write_page_data(arg); | |
583 | ||
584 | case GLOB_SBD_IOCTL_READ_DATA: | |
585 | nand_dbg_print(NAND_DBG_DEBUG, "Spectra IOCTL: " | |
586 | "Read one page data\n"); | |
587 | return ioctl_read_page_data(arg); | |
588 | } | |
589 | ||
590 | return -ENOTTY; | |
591 | } | |
592 | ||
2a48fc0a AB |
593 | static DEFINE_MUTEX(ffsport_mutex); |
594 | ||
6e19d2db JMC |
595 | int GLOB_SBD_unlocked_ioctl(struct block_device *bdev, fmode_t mode, |
596 | unsigned int cmd, unsigned long arg) | |
597 | { | |
598 | int ret; | |
599 | ||
2a48fc0a | 600 | mutex_lock(&ffsport_mutex); |
6e19d2db | 601 | ret = GLOB_SBD_ioctl(bdev, mode, cmd, arg); |
2a48fc0a | 602 | mutex_unlock(&ffsport_mutex); |
6e19d2db JMC |
603 | |
604 | return ret; | |
605 | } | |
606 | ||
494a43bb AO |
607 | static struct block_device_operations GLOB_SBD_ops = { |
608 | .owner = THIS_MODULE, | |
609 | .open = GLOB_SBD_open, | |
610 | .release = GLOB_SBD_release, | |
6e19d2db | 611 | .ioctl = GLOB_SBD_unlocked_ioctl, |
494a43bb AO |
612 | .getgeo = GLOB_SBD_getgeo, |
613 | }; | |
614 | ||
615 | static int SBD_setup_device(struct spectra_nand_dev *dev, int which) | |
616 | { | |
617 | int res_blks; | |
618 | u32 sects; | |
619 | ||
620 | nand_dbg_print(NAND_DBG_TRACE, "%s, Line %d, Function: %s\n", | |
621 | __FILE__, __LINE__, __func__); | |
622 | ||
623 | memset(dev, 0, sizeof(struct spectra_nand_dev)); | |
624 | ||
625 | nand_dbg_print(NAND_DBG_WARN, "Reserved %d blocks " | |
626 | "for OS image, %d blocks for bad block replacement.\n", | |
627 | get_res_blk_num_os(), | |
628 | get_res_blk_num_bad_blk()); | |
629 | ||
630 | res_blks = get_res_blk_num_bad_blk() + get_res_blk_num_os(); | |
631 | ||
632 | dev->size = (u64)IdentifyDeviceData.PageDataSize * | |
633 | IdentifyDeviceData.PagesPerBlock * | |
634 | (IdentifyDeviceData.wDataBlockNum - res_blks); | |
635 | ||
636 | res_blks_os = get_res_blk_num_os(); | |
637 | ||
638 | spin_lock_init(&dev->qlock); | |
639 | ||
640 | dev->tmp_buf = kmalloc(IdentifyDeviceData.PageDataSize, GFP_ATOMIC); | |
641 | if (!dev->tmp_buf) { | |
642 | printk(KERN_ERR "Failed to kmalloc memory in %s Line %d, exit.\n", | |
643 | __FILE__, __LINE__); | |
644 | goto out_vfree; | |
645 | } | |
646 | ||
647 | dev->queue = blk_init_queue(GLOB_SBD_request, &dev->qlock); | |
648 | if (dev->queue == NULL) { | |
649 | printk(KERN_ERR | |
650 | "Spectra: Request queue could not be initialized." | |
651 | " Aborting\n "); | |
652 | goto out_vfree; | |
653 | } | |
654 | dev->queue->queuedata = dev; | |
655 | ||
25985edc | 656 | /* As Linux block layer does't support >4KB hardware sector, */ |
494a43bb AO |
657 | /* Here we force report 512 byte hardware sector size to Kernel */ |
658 | blk_queue_logical_block_size(dev->queue, 512); | |
659 | ||
73e1cc4a | 660 | blk_queue_flush(dev->queue, REQ_FLUSH); |
494a43bb AO |
661 | |
662 | dev->thread = kthread_run(spectra_trans_thread, dev, "nand_thd"); | |
663 | if (IS_ERR(dev->thread)) { | |
664 | blk_cleanup_queue(dev->queue); | |
665 | unregister_blkdev(GLOB_SBD_majornum, GLOB_SBD_NAME); | |
666 | return PTR_ERR(dev->thread); | |
667 | } | |
668 | ||
669 | dev->gd = alloc_disk(PARTITIONS); | |
670 | if (!dev->gd) { | |
671 | printk(KERN_ERR | |
672 | "Spectra: Could not allocate disk. Aborting \n "); | |
673 | goto out_vfree; | |
674 | } | |
675 | dev->gd->major = GLOB_SBD_majornum; | |
676 | dev->gd->first_minor = which * PARTITIONS; | |
677 | dev->gd->fops = &GLOB_SBD_ops; | |
678 | dev->gd->queue = dev->queue; | |
679 | dev->gd->private_data = dev; | |
680 | snprintf(dev->gd->disk_name, 32, "%s%c", GLOB_SBD_NAME, which + 'a'); | |
681 | ||
682 | sects = dev->size >> 9; | |
683 | nand_dbg_print(NAND_DBG_WARN, "Capacity sects: %d\n", sects); | |
684 | set_capacity(dev->gd, sects); | |
685 | ||
686 | add_disk(dev->gd); | |
687 | ||
688 | return 0; | |
689 | out_vfree: | |
690 | return -ENOMEM; | |
691 | } | |
692 | ||
693 | /* | |
694 | static ssize_t show_nand_block_num(struct device *dev, | |
695 | struct device_attribute *attr, char *buf) | |
696 | { | |
697 | return snprintf(buf, PAGE_SIZE, "%d\n", | |
698 | (int)IdentifyDeviceData.wDataBlockNum); | |
699 | } | |
700 | ||
701 | static ssize_t show_nand_pages_per_block(struct device *dev, | |
702 | struct device_attribute *attr, char *buf) | |
703 | { | |
704 | return snprintf(buf, PAGE_SIZE, "%d\n", | |
705 | (int)IdentifyDeviceData.PagesPerBlock); | |
706 | } | |
707 | ||
708 | static ssize_t show_nand_page_size(struct device *dev, | |
709 | struct device_attribute *attr, char *buf) | |
710 | { | |
711 | return snprintf(buf, PAGE_SIZE, "%d\n", | |
712 | (int)IdentifyDeviceData.PageDataSize); | |
713 | } | |
714 | ||
715 | static DEVICE_ATTR(nand_block_num, 0444, show_nand_block_num, NULL); | |
716 | static DEVICE_ATTR(nand_pages_per_block, 0444, show_nand_pages_per_block, NULL); | |
717 | static DEVICE_ATTR(nand_page_size, 0444, show_nand_page_size, NULL); | |
718 | ||
719 | static void create_sysfs_entry(struct device *dev) | |
720 | { | |
721 | if (device_create_file(dev, &dev_attr_nand_block_num)) | |
722 | printk(KERN_ERR "Spectra: " | |
723 | "failed to create sysfs entry nand_block_num.\n"); | |
724 | if (device_create_file(dev, &dev_attr_nand_pages_per_block)) | |
725 | printk(KERN_ERR "Spectra: " | |
726 | "failed to create sysfs entry nand_pages_per_block.\n"); | |
727 | if (device_create_file(dev, &dev_attr_nand_page_size)) | |
728 | printk(KERN_ERR "Spectra: " | |
729 | "failed to create sysfs entry nand_page_size.\n"); | |
730 | } | |
731 | */ | |
732 | ||
63fcf10d | 733 | static void register_spectra_ftl_async(void *unused, async_cookie_t cookie) |
494a43bb AO |
734 | { |
735 | int i; | |
736 | ||
494a43bb AO |
737 | /* create_sysfs_entry(&dev->dev); */ |
738 | ||
739 | if (PASS != GLOB_FTL_IdentifyDevice(&IdentifyDeviceData)) { | |
740 | printk(KERN_ERR "Spectra: Unable to Read Flash Device. " | |
741 | "Aborting\n"); | |
63fcf10d | 742 | return; |
494a43bb AO |
743 | } else { |
744 | nand_dbg_print(NAND_DBG_WARN, "In GLOB_SBD_init: " | |
745 | "Num blocks=%d, pagesperblock=%d, " | |
746 | "pagedatasize=%d, ECCBytesPerSector=%d\n", | |
747 | (int)IdentifyDeviceData.NumBlocks, | |
748 | (int)IdentifyDeviceData.PagesPerBlock, | |
749 | (int)IdentifyDeviceData.PageDataSize, | |
750 | (int)IdentifyDeviceData.wECCBytesPerSector); | |
751 | } | |
752 | ||
753 | printk(KERN_ALERT "Spectra: searching block table, please wait ...\n"); | |
754 | if (GLOB_FTL_Init() != PASS) { | |
755 | printk(KERN_ERR "Spectra: Unable to Initialize FTL Layer. " | |
756 | "Aborting\n"); | |
757 | goto out_ftl_flash_register; | |
758 | } | |
759 | printk(KERN_ALERT "Spectra: block table has been found.\n"); | |
760 | ||
6f5a4162 YW |
761 | GLOB_SBD_majornum = register_blkdev(0, GLOB_SBD_NAME); |
762 | if (GLOB_SBD_majornum <= 0) { | |
763 | printk(KERN_ERR "Unable to get the major %d for Spectra", | |
764 | GLOB_SBD_majornum); | |
765 | goto out_ftl_flash_register; | |
766 | } | |
767 | ||
494a43bb AO |
768 | for (i = 0; i < NUM_DEVICES; i++) |
769 | if (SBD_setup_device(&nand_device[i], i) == -ENOMEM) | |
6f5a4162 | 770 | goto out_blk_register; |
494a43bb AO |
771 | |
772 | nand_dbg_print(NAND_DBG_DEBUG, | |
773 | "Spectra: module loaded with major number %d\n", | |
774 | GLOB_SBD_majornum); | |
775 | ||
63fcf10d | 776 | return; |
494a43bb | 777 | |
6f5a4162 YW |
778 | out_blk_register: |
779 | unregister_blkdev(GLOB_SBD_majornum, GLOB_SBD_NAME); | |
494a43bb AO |
780 | out_ftl_flash_register: |
781 | GLOB_FTL_Cache_Release(); | |
494a43bb | 782 | printk(KERN_ERR "Spectra: Module load failed.\n"); |
63fcf10d | 783 | } |
494a43bb | 784 | |
63fcf10d YW |
785 | int register_spectra_ftl() |
786 | { | |
787 | async_schedule(register_spectra_ftl_async, NULL); | |
788 | return 0; | |
6f5a4162 YW |
789 | } |
790 | EXPORT_SYMBOL_GPL(register_spectra_ftl); | |
791 | ||
792 | static int GLOB_SBD_init(void) | |
793 | { | |
794 | /* Set debug output level (0~3) here. 3 is most verbose */ | |
795 | printk(KERN_ALERT "Spectra: %s\n", GLOB_version); | |
796 | ||
797 | mutex_init(&spectra_lock); | |
798 | ||
799 | if (PASS != GLOB_FTL_Flash_Init()) { | |
800 | printk(KERN_ERR "Spectra: Unable to Initialize Flash Device. " | |
801 | "Aborting\n"); | |
802 | return -ENODEV; | |
803 | } | |
804 | return 0; | |
494a43bb AO |
805 | } |
806 | ||
807 | static void __exit GLOB_SBD_exit(void) | |
808 | { | |
809 | int i; | |
810 | ||
811 | nand_dbg_print(NAND_DBG_TRACE, "%s, Line %d, Function: %s\n", | |
812 | __FILE__, __LINE__, __func__); | |
813 | ||
814 | for (i = 0; i < NUM_DEVICES; i++) { | |
815 | struct spectra_nand_dev *dev = &nand_device[i]; | |
816 | if (dev->gd) { | |
817 | del_gendisk(dev->gd); | |
818 | put_disk(dev->gd); | |
819 | } | |
820 | if (dev->queue) | |
821 | blk_cleanup_queue(dev->queue); | |
822 | kfree(dev->tmp_buf); | |
823 | } | |
824 | ||
825 | unregister_blkdev(GLOB_SBD_majornum, GLOB_SBD_NAME); | |
826 | ||
827 | mutex_lock(&spectra_lock); | |
828 | force_flush_cache(); | |
829 | mutex_unlock(&spectra_lock); | |
830 | ||
831 | GLOB_FTL_Cache_Release(); | |
832 | ||
833 | GLOB_FTL_Flash_Release(); | |
834 | ||
835 | nand_dbg_print(NAND_DBG_DEBUG, | |
836 | "Spectra FTL module (major number %d) unloaded.\n", | |
837 | GLOB_SBD_majornum); | |
838 | } | |
839 | ||
494a43bb AO |
840 | module_init(GLOB_SBD_init); |
841 | module_exit(GLOB_SBD_exit); |