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1da177e4 LT |
1 | /* |
2 | * mm.c - Micro Memory(tm) PCI memory board block device driver - v2.3 | |
3 | * | |
4 | * (C) 2001 San Mehat <nettwerk@valinux.com> | |
5 | * (C) 2001 Johannes Erdfelt <jerdfelt@valinux.com> | |
6 | * (C) 2001 NeilBrown <neilb@cse.unsw.edu.au> | |
7 | * | |
8 | * This driver for the Micro Memory PCI Memory Module with Battery Backup | |
9 | * is Copyright Micro Memory Inc 2001-2002. All rights reserved. | |
10 | * | |
11 | * This driver is released to the public under the terms of the | |
12 | * GNU GENERAL PUBLIC LICENSE version 2 | |
13 | * See the file COPYING for details. | |
14 | * | |
15 | * This driver provides a standard block device interface for Micro Memory(tm) | |
16 | * PCI based RAM boards. | |
17 | * 10/05/01: Phap Nguyen - Rebuilt the driver | |
18 | * 10/22/01: Phap Nguyen - v2.1 Added disk partitioning | |
19 | * 29oct2001:NeilBrown - Use make_request_fn instead of request_fn | |
20 | * - use stand disk partitioning (so fdisk works). | |
21 | * 08nov2001:NeilBrown - change driver name from "mm" to "umem" | |
22 | * - incorporate into main kernel | |
23 | * 08apr2002:NeilBrown - Move some of interrupt handle to tasklet | |
24 | * - use spin_lock_bh instead of _irq | |
25 | * - Never block on make_request. queue | |
26 | * bh's instead. | |
27 | * - unregister umem from devfs at mod unload | |
28 | * - Change version to 2.3 | |
29 | * 07Nov2001:Phap Nguyen - Select pci read command: 06, 12, 15 (Decimal) | |
30 | * 07Jan2002: P. Nguyen - Used PCI Memory Write & Invalidate for DMA | |
31 | * 15May2002:NeilBrown - convert to bio for 2.5 | |
32 | * 17May2002:NeilBrown - remove init_mem initialisation. Instead detect | |
33 | * - a sequence of writes that cover the card, and | |
34 | * - set initialised bit then. | |
35 | */ | |
36 | ||
46308c0b | 37 | //#define DEBUG /* uncomment if you want debugging info (pr_debug) */ |
1da177e4 LT |
38 | #include <linux/fs.h> |
39 | #include <linux/bio.h> | |
40 | #include <linux/kernel.h> | |
41 | #include <linux/mm.h> | |
42 | #include <linux/mman.h> | |
43 | #include <linux/ioctl.h> | |
44 | #include <linux/module.h> | |
45 | #include <linux/init.h> | |
46 | #include <linux/interrupt.h> | |
1da177e4 LT |
47 | #include <linux/timer.h> |
48 | #include <linux/pci.h> | |
49 | #include <linux/slab.h> | |
910638ae | 50 | #include <linux/dma-mapping.h> |
1da177e4 LT |
51 | |
52 | #include <linux/fcntl.h> /* O_ACCMODE */ | |
53 | #include <linux/hdreg.h> /* HDIO_GETGEO */ | |
54 | ||
55 | #include <linux/umem.h> | |
56 | ||
57 | #include <asm/uaccess.h> | |
58 | #include <asm/io.h> | |
59 | ||
1da177e4 LT |
60 | #define MM_MAXCARDS 4 |
61 | #define MM_RAHEAD 2 /* two sectors */ | |
62 | #define MM_BLKSIZE 1024 /* 1k blocks */ | |
63 | #define MM_HARDSECT 512 /* 512-byte hardware sectors */ | |
64 | #define MM_SHIFT 6 /* max 64 partitions on 4 cards */ | |
65 | ||
66 | /* | |
67 | * Version Information | |
68 | */ | |
69 | ||
70 | #define DRIVER_VERSION "v2.3" | |
71 | #define DRIVER_AUTHOR "San Mehat, Johannes Erdfelt, NeilBrown" | |
72 | #define DRIVER_DESC "Micro Memory(tm) PCI memory board block driver" | |
73 | ||
74 | static int debug; | |
75 | /* #define HW_TRACE(x) writeb(x,cards[0].csr_remap + MEMCTRLSTATUS_MAGIC) */ | |
76 | #define HW_TRACE(x) | |
77 | ||
78 | #define DEBUG_LED_ON_TRANSFER 0x01 | |
79 | #define DEBUG_BATTERY_POLLING 0x02 | |
80 | ||
81 | module_param(debug, int, 0644); | |
82 | MODULE_PARM_DESC(debug, "Debug bitmask"); | |
83 | ||
84 | static int pci_read_cmd = 0x0C; /* Read Multiple */ | |
85 | module_param(pci_read_cmd, int, 0); | |
86 | MODULE_PARM_DESC(pci_read_cmd, "PCI read command"); | |
87 | ||
88 | static int pci_write_cmd = 0x0F; /* Write and Invalidate */ | |
89 | module_param(pci_write_cmd, int, 0); | |
90 | MODULE_PARM_DESC(pci_write_cmd, "PCI write command"); | |
91 | ||
92 | static int pci_cmds; | |
93 | ||
94 | static int major_nr; | |
95 | ||
96 | #include <linux/blkdev.h> | |
97 | #include <linux/blkpg.h> | |
98 | ||
99 | struct cardinfo { | |
100 | int card_number; | |
101 | struct pci_dev *dev; | |
102 | ||
103 | int irq; | |
104 | ||
105 | unsigned long csr_base; | |
106 | unsigned char __iomem *csr_remap; | |
107 | unsigned long csr_len; | |
108 | #ifdef CONFIG_MM_MAP_MEMORY | |
109 | unsigned long mem_base; | |
110 | unsigned char __iomem *mem_remap; | |
111 | unsigned long mem_len; | |
112 | #endif | |
113 | ||
114 | unsigned int win_size; /* PCI window size */ | |
115 | unsigned int mm_size; /* size in kbytes */ | |
116 | ||
117 | unsigned int init_size; /* initial segment, in sectors, | |
118 | * that we know to | |
119 | * have been written | |
120 | */ | |
121 | struct bio *bio, *currentbio, **biotail; | |
122 | ||
123 | request_queue_t *queue; | |
124 | ||
125 | struct mm_page { | |
126 | dma_addr_t page_dma; | |
127 | struct mm_dma_desc *desc; | |
128 | int cnt, headcnt; | |
129 | struct bio *bio, **biotail; | |
130 | } mm_pages[2]; | |
131 | #define DESC_PER_PAGE ((PAGE_SIZE*2)/sizeof(struct mm_dma_desc)) | |
132 | ||
133 | int Active, Ready; | |
134 | ||
135 | struct tasklet_struct tasklet; | |
136 | unsigned int dma_status; | |
137 | ||
138 | struct { | |
139 | int good; | |
140 | int warned; | |
141 | unsigned long last_change; | |
142 | } battery[2]; | |
143 | ||
144 | spinlock_t lock; | |
145 | int check_batteries; | |
146 | ||
147 | int flags; | |
148 | }; | |
149 | ||
150 | static struct cardinfo cards[MM_MAXCARDS]; | |
151 | static struct block_device_operations mm_fops; | |
152 | static struct timer_list battery_timer; | |
153 | ||
154 | static int num_cards = 0; | |
155 | ||
156 | static struct gendisk *mm_gendisk[MM_MAXCARDS]; | |
157 | ||
158 | static void check_batteries(struct cardinfo *card); | |
159 | ||
160 | /* | |
161 | ----------------------------------------------------------------------------------- | |
162 | -- get_userbit | |
163 | ----------------------------------------------------------------------------------- | |
164 | */ | |
165 | static int get_userbit(struct cardinfo *card, int bit) | |
166 | { | |
167 | unsigned char led; | |
168 | ||
169 | led = readb(card->csr_remap + MEMCTRLCMD_LEDCTRL); | |
170 | return led & bit; | |
171 | } | |
172 | /* | |
173 | ----------------------------------------------------------------------------------- | |
174 | -- set_userbit | |
175 | ----------------------------------------------------------------------------------- | |
176 | */ | |
177 | static int set_userbit(struct cardinfo *card, int bit, unsigned char state) | |
178 | { | |
179 | unsigned char led; | |
180 | ||
181 | led = readb(card->csr_remap + MEMCTRLCMD_LEDCTRL); | |
182 | if (state) | |
183 | led |= bit; | |
184 | else | |
185 | led &= ~bit; | |
186 | writeb(led, card->csr_remap + MEMCTRLCMD_LEDCTRL); | |
187 | ||
188 | return 0; | |
189 | } | |
190 | /* | |
191 | ----------------------------------------------------------------------------------- | |
192 | -- set_led | |
193 | ----------------------------------------------------------------------------------- | |
194 | */ | |
195 | /* | |
196 | * NOTE: For the power LED, use the LED_POWER_* macros since they differ | |
197 | */ | |
198 | static void set_led(struct cardinfo *card, int shift, unsigned char state) | |
199 | { | |
200 | unsigned char led; | |
201 | ||
202 | led = readb(card->csr_remap + MEMCTRLCMD_LEDCTRL); | |
203 | if (state == LED_FLIP) | |
204 | led ^= (1<<shift); | |
205 | else { | |
206 | led &= ~(0x03 << shift); | |
207 | led |= (state << shift); | |
208 | } | |
209 | writeb(led, card->csr_remap + MEMCTRLCMD_LEDCTRL); | |
210 | ||
211 | } | |
212 | ||
213 | #ifdef MM_DIAG | |
214 | /* | |
215 | ----------------------------------------------------------------------------------- | |
216 | -- dump_regs | |
217 | ----------------------------------------------------------------------------------- | |
218 | */ | |
219 | static void dump_regs(struct cardinfo *card) | |
220 | { | |
221 | unsigned char *p; | |
222 | int i, i1; | |
223 | ||
224 | p = card->csr_remap; | |
225 | for (i = 0; i < 8; i++) { | |
226 | printk(KERN_DEBUG "%p ", p); | |
227 | ||
228 | for (i1 = 0; i1 < 16; i1++) | |
229 | printk("%02x ", *p++); | |
230 | ||
231 | printk("\n"); | |
232 | } | |
233 | } | |
234 | #endif | |
235 | /* | |
236 | ----------------------------------------------------------------------------------- | |
237 | -- dump_dmastat | |
238 | ----------------------------------------------------------------------------------- | |
239 | */ | |
240 | static void dump_dmastat(struct cardinfo *card, unsigned int dmastat) | |
241 | { | |
242 | printk(KERN_DEBUG "MM%d*: DMAstat - ", card->card_number); | |
243 | if (dmastat & DMASCR_ANY_ERR) | |
244 | printk("ANY_ERR "); | |
245 | if (dmastat & DMASCR_MBE_ERR) | |
246 | printk("MBE_ERR "); | |
247 | if (dmastat & DMASCR_PARITY_ERR_REP) | |
248 | printk("PARITY_ERR_REP "); | |
249 | if (dmastat & DMASCR_PARITY_ERR_DET) | |
250 | printk("PARITY_ERR_DET "); | |
251 | if (dmastat & DMASCR_SYSTEM_ERR_SIG) | |
252 | printk("SYSTEM_ERR_SIG "); | |
253 | if (dmastat & DMASCR_TARGET_ABT) | |
254 | printk("TARGET_ABT "); | |
255 | if (dmastat & DMASCR_MASTER_ABT) | |
256 | printk("MASTER_ABT "); | |
257 | if (dmastat & DMASCR_CHAIN_COMPLETE) | |
258 | printk("CHAIN_COMPLETE "); | |
259 | if (dmastat & DMASCR_DMA_COMPLETE) | |
260 | printk("DMA_COMPLETE "); | |
261 | printk("\n"); | |
262 | } | |
263 | ||
264 | /* | |
265 | * Theory of request handling | |
266 | * | |
267 | * Each bio is assigned to one mm_dma_desc - which may not be enough FIXME | |
268 | * We have two pages of mm_dma_desc, holding about 64 descriptors | |
269 | * each. These are allocated at init time. | |
270 | * One page is "Ready" and is either full, or can have request added. | |
271 | * The other page might be "Active", which DMA is happening on it. | |
272 | * | |
273 | * Whenever IO on the active page completes, the Ready page is activated | |
274 | * and the ex-Active page is clean out and made Ready. | |
275 | * Otherwise the Ready page is only activated when it becomes full, or | |
276 | * when mm_unplug_device is called via the unplug_io_fn. | |
277 | * | |
278 | * If a request arrives while both pages a full, it is queued, and b_rdev is | |
279 | * overloaded to record whether it was a read or a write. | |
280 | * | |
281 | * The interrupt handler only polls the device to clear the interrupt. | |
282 | * The processing of the result is done in a tasklet. | |
283 | */ | |
284 | ||
285 | static void mm_start_io(struct cardinfo *card) | |
286 | { | |
287 | /* we have the lock, we know there is | |
288 | * no IO active, and we know that card->Active | |
289 | * is set | |
290 | */ | |
291 | struct mm_dma_desc *desc; | |
292 | struct mm_page *page; | |
293 | int offset; | |
294 | ||
295 | /* make the last descriptor end the chain */ | |
296 | page = &card->mm_pages[card->Active]; | |
46308c0b | 297 | pr_debug("start_io: %d %d->%d\n", card->Active, page->headcnt, page->cnt-1); |
1da177e4 LT |
298 | desc = &page->desc[page->cnt-1]; |
299 | ||
300 | desc->control_bits |= cpu_to_le32(DMASCR_CHAIN_COMP_EN); | |
301 | desc->control_bits &= ~cpu_to_le32(DMASCR_CHAIN_EN); | |
302 | desc->sem_control_bits = desc->control_bits; | |
303 | ||
304 | ||
305 | if (debug & DEBUG_LED_ON_TRANSFER) | |
306 | set_led(card, LED_REMOVE, LED_ON); | |
307 | ||
308 | desc = &page->desc[page->headcnt]; | |
309 | writel(0, card->csr_remap + DMA_PCI_ADDR); | |
310 | writel(0, card->csr_remap + DMA_PCI_ADDR + 4); | |
311 | ||
312 | writel(0, card->csr_remap + DMA_LOCAL_ADDR); | |
313 | writel(0, card->csr_remap + DMA_LOCAL_ADDR + 4); | |
314 | ||
315 | writel(0, card->csr_remap + DMA_TRANSFER_SIZE); | |
316 | writel(0, card->csr_remap + DMA_TRANSFER_SIZE + 4); | |
317 | ||
318 | writel(0, card->csr_remap + DMA_SEMAPHORE_ADDR); | |
319 | writel(0, card->csr_remap + DMA_SEMAPHORE_ADDR + 4); | |
320 | ||
321 | offset = ((char*)desc) - ((char*)page->desc); | |
322 | writel(cpu_to_le32((page->page_dma+offset)&0xffffffff), | |
323 | card->csr_remap + DMA_DESCRIPTOR_ADDR); | |
324 | /* Force the value to u64 before shifting otherwise >> 32 is undefined C | |
325 | * and on some ports will do nothing ! */ | |
326 | writel(cpu_to_le32(((u64)page->page_dma)>>32), | |
327 | card->csr_remap + DMA_DESCRIPTOR_ADDR + 4); | |
328 | ||
329 | /* Go, go, go */ | |
330 | writel(cpu_to_le32(DMASCR_GO | DMASCR_CHAIN_EN | pci_cmds), | |
331 | card->csr_remap + DMA_STATUS_CTRL); | |
332 | } | |
333 | ||
334 | static int add_bio(struct cardinfo *card); | |
335 | ||
336 | static void activate(struct cardinfo *card) | |
337 | { | |
338 | /* if No page is Active, and Ready is | |
339 | * not empty, then switch Ready page | |
340 | * to active and start IO. | |
341 | * Then add any bh's that are available to Ready | |
342 | */ | |
343 | ||
344 | do { | |
345 | while (add_bio(card)) | |
346 | ; | |
347 | ||
348 | if (card->Active == -1 && | |
349 | card->mm_pages[card->Ready].cnt > 0) { | |
350 | card->Active = card->Ready; | |
351 | card->Ready = 1-card->Ready; | |
352 | mm_start_io(card); | |
353 | } | |
354 | ||
355 | } while (card->Active == -1 && add_bio(card)); | |
356 | } | |
357 | ||
358 | static inline void reset_page(struct mm_page *page) | |
359 | { | |
360 | page->cnt = 0; | |
361 | page->headcnt = 0; | |
362 | page->bio = NULL; | |
363 | page->biotail = & page->bio; | |
364 | } | |
365 | ||
366 | static void mm_unplug_device(request_queue_t *q) | |
367 | { | |
368 | struct cardinfo *card = q->queuedata; | |
369 | unsigned long flags; | |
370 | ||
371 | spin_lock_irqsave(&card->lock, flags); | |
372 | if (blk_remove_plug(q)) | |
373 | activate(card); | |
374 | spin_unlock_irqrestore(&card->lock, flags); | |
375 | } | |
376 | ||
377 | /* | |
378 | * If there is room on Ready page, take | |
379 | * one bh off list and add it. | |
380 | * return 1 if there was room, else 0. | |
381 | */ | |
382 | static int add_bio(struct cardinfo *card) | |
383 | { | |
384 | struct mm_page *p; | |
385 | struct mm_dma_desc *desc; | |
386 | dma_addr_t dma_handle; | |
387 | int offset; | |
388 | struct bio *bio; | |
389 | int rw; | |
390 | int len; | |
391 | ||
392 | bio = card->currentbio; | |
393 | if (!bio && card->bio) { | |
394 | card->currentbio = card->bio; | |
395 | card->bio = card->bio->bi_next; | |
396 | if (card->bio == NULL) | |
397 | card->biotail = &card->bio; | |
398 | card->currentbio->bi_next = NULL; | |
399 | return 1; | |
400 | } | |
401 | if (!bio) | |
402 | return 0; | |
403 | ||
404 | rw = bio_rw(bio); | |
405 | if (card->mm_pages[card->Ready].cnt >= DESC_PER_PAGE) | |
406 | return 0; | |
407 | ||
408 | len = bio_iovec(bio)->bv_len; | |
409 | dma_handle = pci_map_page(card->dev, | |
410 | bio_page(bio), | |
411 | bio_offset(bio), | |
412 | len, | |
413 | (rw==READ) ? | |
414 | PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE); | |
415 | ||
416 | p = &card->mm_pages[card->Ready]; | |
417 | desc = &p->desc[p->cnt]; | |
418 | p->cnt++; | |
419 | if ((p->biotail) != &bio->bi_next) { | |
420 | *(p->biotail) = bio; | |
421 | p->biotail = &(bio->bi_next); | |
422 | bio->bi_next = NULL; | |
423 | } | |
424 | ||
425 | desc->data_dma_handle = dma_handle; | |
426 | ||
427 | desc->pci_addr = cpu_to_le64((u64)desc->data_dma_handle); | |
428 | desc->local_addr= cpu_to_le64(bio->bi_sector << 9); | |
429 | desc->transfer_size = cpu_to_le32(len); | |
430 | offset = ( ((char*)&desc->sem_control_bits) - ((char*)p->desc)); | |
431 | desc->sem_addr = cpu_to_le64((u64)(p->page_dma+offset)); | |
432 | desc->zero1 = desc->zero2 = 0; | |
433 | offset = ( ((char*)(desc+1)) - ((char*)p->desc)); | |
434 | desc->next_desc_addr = cpu_to_le64(p->page_dma+offset); | |
435 | desc->control_bits = cpu_to_le32(DMASCR_GO|DMASCR_ERR_INT_EN| | |
436 | DMASCR_PARITY_INT_EN| | |
437 | DMASCR_CHAIN_EN | | |
438 | DMASCR_SEM_EN | | |
439 | pci_cmds); | |
440 | if (rw == WRITE) | |
441 | desc->control_bits |= cpu_to_le32(DMASCR_TRANSFER_READ); | |
442 | desc->sem_control_bits = desc->control_bits; | |
443 | ||
444 | bio->bi_sector += (len>>9); | |
445 | bio->bi_size -= len; | |
446 | bio->bi_idx++; | |
447 | if (bio->bi_idx >= bio->bi_vcnt) | |
448 | card->currentbio = NULL; | |
449 | ||
450 | return 1; | |
451 | } | |
452 | ||
453 | static void process_page(unsigned long data) | |
454 | { | |
455 | /* check if any of the requests in the page are DMA_COMPLETE, | |
456 | * and deal with them appropriately. | |
457 | * If we find a descriptor without DMA_COMPLETE in the semaphore, then | |
458 | * dma must have hit an error on that descriptor, so use dma_status instead | |
459 | * and assume that all following descriptors must be re-tried. | |
460 | */ | |
461 | struct mm_page *page; | |
462 | struct bio *return_bio=NULL; | |
463 | struct cardinfo *card = (struct cardinfo *)data; | |
464 | unsigned int dma_status = card->dma_status; | |
465 | ||
466 | spin_lock_bh(&card->lock); | |
467 | if (card->Active < 0) | |
468 | goto out_unlock; | |
469 | page = &card->mm_pages[card->Active]; | |
470 | ||
471 | while (page->headcnt < page->cnt) { | |
472 | struct bio *bio = page->bio; | |
473 | struct mm_dma_desc *desc = &page->desc[page->headcnt]; | |
474 | int control = le32_to_cpu(desc->sem_control_bits); | |
475 | int last=0; | |
476 | int idx; | |
477 | ||
478 | if (!(control & DMASCR_DMA_COMPLETE)) { | |
479 | control = dma_status; | |
480 | last=1; | |
481 | } | |
482 | page->headcnt++; | |
483 | idx = bio->bi_phys_segments; | |
484 | bio->bi_phys_segments++; | |
485 | if (bio->bi_phys_segments >= bio->bi_vcnt) | |
486 | page->bio = bio->bi_next; | |
487 | ||
488 | pci_unmap_page(card->dev, desc->data_dma_handle, | |
489 | bio_iovec_idx(bio,idx)->bv_len, | |
490 | (control& DMASCR_TRANSFER_READ) ? | |
491 | PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); | |
492 | if (control & DMASCR_HARD_ERROR) { | |
493 | /* error */ | |
494 | clear_bit(BIO_UPTODATE, &bio->bi_flags); | |
495 | printk(KERN_WARNING "MM%d: I/O error on sector %d/%d\n", | |
496 | card->card_number, | |
497 | le32_to_cpu(desc->local_addr)>>9, | |
498 | le32_to_cpu(desc->transfer_size)); | |
499 | dump_dmastat(card, control); | |
500 | } else if (test_bit(BIO_RW, &bio->bi_rw) && | |
501 | le32_to_cpu(desc->local_addr)>>9 == card->init_size) { | |
502 | card->init_size += le32_to_cpu(desc->transfer_size)>>9; | |
503 | if (card->init_size>>1 >= card->mm_size) { | |
504 | printk(KERN_INFO "MM%d: memory now initialised\n", | |
505 | card->card_number); | |
506 | set_userbit(card, MEMORY_INITIALIZED, 1); | |
507 | } | |
508 | } | |
509 | if (bio != page->bio) { | |
510 | bio->bi_next = return_bio; | |
511 | return_bio = bio; | |
512 | } | |
513 | ||
514 | if (last) break; | |
515 | } | |
516 | ||
517 | if (debug & DEBUG_LED_ON_TRANSFER) | |
518 | set_led(card, LED_REMOVE, LED_OFF); | |
519 | ||
520 | if (card->check_batteries) { | |
521 | card->check_batteries = 0; | |
522 | check_batteries(card); | |
523 | } | |
524 | if (page->headcnt >= page->cnt) { | |
525 | reset_page(page); | |
526 | card->Active = -1; | |
527 | activate(card); | |
528 | } else { | |
529 | /* haven't finished with this one yet */ | |
46308c0b | 530 | pr_debug("do some more\n"); |
1da177e4 LT |
531 | mm_start_io(card); |
532 | } | |
533 | out_unlock: | |
534 | spin_unlock_bh(&card->lock); | |
535 | ||
536 | while(return_bio) { | |
537 | struct bio *bio = return_bio; | |
538 | ||
539 | return_bio = bio->bi_next; | |
540 | bio->bi_next = NULL; | |
541 | bio_endio(bio, bio->bi_size, 0); | |
542 | } | |
543 | } | |
544 | ||
545 | /* | |
546 | ----------------------------------------------------------------------------------- | |
547 | -- mm_make_request | |
548 | ----------------------------------------------------------------------------------- | |
549 | */ | |
550 | static int mm_make_request(request_queue_t *q, struct bio *bio) | |
551 | { | |
552 | struct cardinfo *card = q->queuedata; | |
f2b9ecc4 ZB |
553 | pr_debug("mm_make_request %llu %u\n", |
554 | (unsigned long long)bio->bi_sector, bio->bi_size); | |
1da177e4 LT |
555 | |
556 | bio->bi_phys_segments = bio->bi_idx; /* count of completed segments*/ | |
557 | spin_lock_irq(&card->lock); | |
558 | *card->biotail = bio; | |
559 | bio->bi_next = NULL; | |
560 | card->biotail = &bio->bi_next; | |
561 | blk_plug_device(q); | |
562 | spin_unlock_irq(&card->lock); | |
563 | ||
564 | return 0; | |
565 | } | |
566 | ||
567 | /* | |
568 | ----------------------------------------------------------------------------------- | |
569 | -- mm_interrupt | |
570 | ----------------------------------------------------------------------------------- | |
571 | */ | |
7d12e780 | 572 | static irqreturn_t mm_interrupt(int irq, void *__card) |
1da177e4 LT |
573 | { |
574 | struct cardinfo *card = (struct cardinfo *) __card; | |
575 | unsigned int dma_status; | |
576 | unsigned short cfg_status; | |
577 | ||
578 | HW_TRACE(0x30); | |
579 | ||
580 | dma_status = le32_to_cpu(readl(card->csr_remap + DMA_STATUS_CTRL)); | |
581 | ||
582 | if (!(dma_status & (DMASCR_ERROR_MASK | DMASCR_CHAIN_COMPLETE))) { | |
583 | /* interrupt wasn't for me ... */ | |
584 | return IRQ_NONE; | |
585 | } | |
586 | ||
587 | /* clear COMPLETION interrupts */ | |
588 | if (card->flags & UM_FLAG_NO_BYTE_STATUS) | |
589 | writel(cpu_to_le32(DMASCR_DMA_COMPLETE|DMASCR_CHAIN_COMPLETE), | |
590 | card->csr_remap+ DMA_STATUS_CTRL); | |
591 | else | |
592 | writeb((DMASCR_DMA_COMPLETE|DMASCR_CHAIN_COMPLETE) >> 16, | |
593 | card->csr_remap+ DMA_STATUS_CTRL + 2); | |
594 | ||
595 | /* log errors and clear interrupt status */ | |
596 | if (dma_status & DMASCR_ANY_ERR) { | |
597 | unsigned int data_log1, data_log2; | |
598 | unsigned int addr_log1, addr_log2; | |
599 | unsigned char stat, count, syndrome, check; | |
600 | ||
601 | stat = readb(card->csr_remap + MEMCTRLCMD_ERRSTATUS); | |
602 | ||
603 | data_log1 = le32_to_cpu(readl(card->csr_remap + ERROR_DATA_LOG)); | |
604 | data_log2 = le32_to_cpu(readl(card->csr_remap + ERROR_DATA_LOG + 4)); | |
605 | addr_log1 = le32_to_cpu(readl(card->csr_remap + ERROR_ADDR_LOG)); | |
606 | addr_log2 = readb(card->csr_remap + ERROR_ADDR_LOG + 4); | |
607 | ||
608 | count = readb(card->csr_remap + ERROR_COUNT); | |
609 | syndrome = readb(card->csr_remap + ERROR_SYNDROME); | |
610 | check = readb(card->csr_remap + ERROR_CHECK); | |
611 | ||
612 | dump_dmastat(card, dma_status); | |
613 | ||
614 | if (stat & 0x01) | |
615 | printk(KERN_ERR "MM%d*: Memory access error detected (err count %d)\n", | |
616 | card->card_number, count); | |
617 | if (stat & 0x02) | |
618 | printk(KERN_ERR "MM%d*: Multi-bit EDC error\n", | |
619 | card->card_number); | |
620 | ||
621 | printk(KERN_ERR "MM%d*: Fault Address 0x%02x%08x, Fault Data 0x%08x%08x\n", | |
622 | card->card_number, addr_log2, addr_log1, data_log2, data_log1); | |
623 | printk(KERN_ERR "MM%d*: Fault Check 0x%02x, Fault Syndrome 0x%02x\n", | |
624 | card->card_number, check, syndrome); | |
625 | ||
626 | writeb(0, card->csr_remap + ERROR_COUNT); | |
627 | } | |
628 | ||
629 | if (dma_status & DMASCR_PARITY_ERR_REP) { | |
630 | printk(KERN_ERR "MM%d*: PARITY ERROR REPORTED\n", card->card_number); | |
631 | pci_read_config_word(card->dev, PCI_STATUS, &cfg_status); | |
632 | pci_write_config_word(card->dev, PCI_STATUS, cfg_status); | |
633 | } | |
634 | ||
635 | if (dma_status & DMASCR_PARITY_ERR_DET) { | |
636 | printk(KERN_ERR "MM%d*: PARITY ERROR DETECTED\n", card->card_number); | |
637 | pci_read_config_word(card->dev, PCI_STATUS, &cfg_status); | |
638 | pci_write_config_word(card->dev, PCI_STATUS, cfg_status); | |
639 | } | |
640 | ||
641 | if (dma_status & DMASCR_SYSTEM_ERR_SIG) { | |
642 | printk(KERN_ERR "MM%d*: SYSTEM ERROR\n", card->card_number); | |
643 | pci_read_config_word(card->dev, PCI_STATUS, &cfg_status); | |
644 | pci_write_config_word(card->dev, PCI_STATUS, cfg_status); | |
645 | } | |
646 | ||
647 | if (dma_status & DMASCR_TARGET_ABT) { | |
648 | printk(KERN_ERR "MM%d*: TARGET ABORT\n", card->card_number); | |
649 | pci_read_config_word(card->dev, PCI_STATUS, &cfg_status); | |
650 | pci_write_config_word(card->dev, PCI_STATUS, cfg_status); | |
651 | } | |
652 | ||
653 | if (dma_status & DMASCR_MASTER_ABT) { | |
654 | printk(KERN_ERR "MM%d*: MASTER ABORT\n", card->card_number); | |
655 | pci_read_config_word(card->dev, PCI_STATUS, &cfg_status); | |
656 | pci_write_config_word(card->dev, PCI_STATUS, cfg_status); | |
657 | } | |
658 | ||
659 | /* and process the DMA descriptors */ | |
660 | card->dma_status = dma_status; | |
661 | tasklet_schedule(&card->tasklet); | |
662 | ||
663 | HW_TRACE(0x36); | |
664 | ||
665 | return IRQ_HANDLED; | |
666 | } | |
667 | /* | |
668 | ----------------------------------------------------------------------------------- | |
669 | -- set_fault_to_battery_status | |
670 | ----------------------------------------------------------------------------------- | |
671 | */ | |
672 | /* | |
673 | * If both batteries are good, no LED | |
674 | * If either battery has been warned, solid LED | |
675 | * If both batteries are bad, flash the LED quickly | |
676 | * If either battery is bad, flash the LED semi quickly | |
677 | */ | |
678 | static void set_fault_to_battery_status(struct cardinfo *card) | |
679 | { | |
680 | if (card->battery[0].good && card->battery[1].good) | |
681 | set_led(card, LED_FAULT, LED_OFF); | |
682 | else if (card->battery[0].warned || card->battery[1].warned) | |
683 | set_led(card, LED_FAULT, LED_ON); | |
684 | else if (!card->battery[0].good && !card->battery[1].good) | |
685 | set_led(card, LED_FAULT, LED_FLASH_7_0); | |
686 | else | |
687 | set_led(card, LED_FAULT, LED_FLASH_3_5); | |
688 | } | |
689 | ||
690 | static void init_battery_timer(void); | |
691 | ||
692 | ||
693 | /* | |
694 | ----------------------------------------------------------------------------------- | |
695 | -- check_battery | |
696 | ----------------------------------------------------------------------------------- | |
697 | */ | |
698 | static int check_battery(struct cardinfo *card, int battery, int status) | |
699 | { | |
700 | if (status != card->battery[battery].good) { | |
701 | card->battery[battery].good = !card->battery[battery].good; | |
702 | card->battery[battery].last_change = jiffies; | |
703 | ||
704 | if (card->battery[battery].good) { | |
705 | printk(KERN_ERR "MM%d: Battery %d now good\n", | |
706 | card->card_number, battery + 1); | |
707 | card->battery[battery].warned = 0; | |
708 | } else | |
709 | printk(KERN_ERR "MM%d: Battery %d now FAILED\n", | |
710 | card->card_number, battery + 1); | |
711 | ||
712 | return 1; | |
713 | } else if (!card->battery[battery].good && | |
714 | !card->battery[battery].warned && | |
715 | time_after_eq(jiffies, card->battery[battery].last_change + | |
716 | (HZ * 60 * 60 * 5))) { | |
717 | printk(KERN_ERR "MM%d: Battery %d still FAILED after 5 hours\n", | |
718 | card->card_number, battery + 1); | |
719 | card->battery[battery].warned = 1; | |
720 | ||
721 | return 1; | |
722 | } | |
723 | ||
724 | return 0; | |
725 | } | |
726 | /* | |
727 | ----------------------------------------------------------------------------------- | |
728 | -- check_batteries | |
729 | ----------------------------------------------------------------------------------- | |
730 | */ | |
731 | static void check_batteries(struct cardinfo *card) | |
732 | { | |
733 | /* NOTE: this must *never* be called while the card | |
734 | * is doing (bus-to-card) DMA, or you will need the | |
735 | * reset switch | |
736 | */ | |
737 | unsigned char status; | |
738 | int ret1, ret2; | |
739 | ||
740 | status = readb(card->csr_remap + MEMCTRLSTATUS_BATTERY); | |
741 | if (debug & DEBUG_BATTERY_POLLING) | |
742 | printk(KERN_DEBUG "MM%d: checking battery status, 1 = %s, 2 = %s\n", | |
743 | card->card_number, | |
744 | (status & BATTERY_1_FAILURE) ? "FAILURE" : "OK", | |
745 | (status & BATTERY_2_FAILURE) ? "FAILURE" : "OK"); | |
746 | ||
747 | ret1 = check_battery(card, 0, !(status & BATTERY_1_FAILURE)); | |
748 | ret2 = check_battery(card, 1, !(status & BATTERY_2_FAILURE)); | |
749 | ||
750 | if (ret1 || ret2) | |
751 | set_fault_to_battery_status(card); | |
752 | } | |
753 | ||
754 | static void check_all_batteries(unsigned long ptr) | |
755 | { | |
756 | int i; | |
757 | ||
758 | for (i = 0; i < num_cards; i++) | |
759 | if (!(cards[i].flags & UM_FLAG_NO_BATT)) { | |
760 | struct cardinfo *card = &cards[i]; | |
761 | spin_lock_bh(&card->lock); | |
762 | if (card->Active >= 0) | |
763 | card->check_batteries = 1; | |
764 | else | |
765 | check_batteries(card); | |
766 | spin_unlock_bh(&card->lock); | |
767 | } | |
768 | ||
769 | init_battery_timer(); | |
770 | } | |
771 | /* | |
772 | ----------------------------------------------------------------------------------- | |
773 | -- init_battery_timer | |
774 | ----------------------------------------------------------------------------------- | |
775 | */ | |
776 | static void init_battery_timer(void) | |
777 | { | |
778 | init_timer(&battery_timer); | |
779 | battery_timer.function = check_all_batteries; | |
780 | battery_timer.expires = jiffies + (HZ * 60); | |
781 | add_timer(&battery_timer); | |
782 | } | |
783 | /* | |
784 | ----------------------------------------------------------------------------------- | |
785 | -- del_battery_timer | |
786 | ----------------------------------------------------------------------------------- | |
787 | */ | |
788 | static void del_battery_timer(void) | |
789 | { | |
790 | del_timer(&battery_timer); | |
791 | } | |
792 | /* | |
793 | ----------------------------------------------------------------------------------- | |
794 | -- mm_revalidate | |
795 | ----------------------------------------------------------------------------------- | |
796 | */ | |
797 | /* | |
798 | * Note no locks taken out here. In a worst case scenario, we could drop | |
799 | * a chunk of system memory. But that should never happen, since validation | |
800 | * happens at open or mount time, when locks are held. | |
801 | * | |
802 | * That's crap, since doing that while some partitions are opened | |
803 | * or mounted will give you really nasty results. | |
804 | */ | |
805 | static int mm_revalidate(struct gendisk *disk) | |
806 | { | |
807 | struct cardinfo *card = disk->private_data; | |
808 | set_capacity(disk, card->mm_size << 1); | |
809 | return 0; | |
810 | } | |
a885c8c4 CH |
811 | |
812 | static int mm_getgeo(struct block_device *bdev, struct hd_geometry *geo) | |
1da177e4 | 813 | { |
a885c8c4 CH |
814 | struct cardinfo *card = bdev->bd_disk->private_data; |
815 | int size = card->mm_size * (1024 / MM_HARDSECT); | |
1da177e4 | 816 | |
a885c8c4 CH |
817 | /* |
818 | * get geometry: we have to fake one... trim the size to a | |
819 | * multiple of 2048 (1M): tell we have 32 sectors, 64 heads, | |
820 | * whatever cylinders. | |
821 | */ | |
822 | geo->heads = 64; | |
823 | geo->sectors = 32; | |
824 | geo->cylinders = size / (geo->heads * geo->sectors); | |
825 | return 0; | |
1da177e4 | 826 | } |
a885c8c4 | 827 | |
1da177e4 LT |
828 | /* |
829 | ----------------------------------------------------------------------------------- | |
830 | -- mm_check_change | |
831 | ----------------------------------------------------------------------------------- | |
832 | Future support for removable devices | |
833 | */ | |
834 | static int mm_check_change(struct gendisk *disk) | |
835 | { | |
836 | /* struct cardinfo *dev = disk->private_data; */ | |
837 | return 0; | |
838 | } | |
839 | /* | |
840 | ----------------------------------------------------------------------------------- | |
841 | -- mm_fops | |
842 | ----------------------------------------------------------------------------------- | |
843 | */ | |
844 | static struct block_device_operations mm_fops = { | |
845 | .owner = THIS_MODULE, | |
a885c8c4 | 846 | .getgeo = mm_getgeo, |
1da177e4 LT |
847 | .revalidate_disk= mm_revalidate, |
848 | .media_changed = mm_check_change, | |
849 | }; | |
850 | /* | |
851 | ----------------------------------------------------------------------------------- | |
852 | -- mm_pci_probe | |
853 | ----------------------------------------------------------------------------------- | |
854 | */ | |
855 | static int __devinit mm_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) | |
856 | { | |
857 | int ret = -ENODEV; | |
858 | struct cardinfo *card = &cards[num_cards]; | |
859 | unsigned char mem_present; | |
860 | unsigned char batt_status; | |
861 | unsigned int saved_bar, data; | |
862 | int magic_number; | |
863 | ||
864 | if (pci_enable_device(dev) < 0) | |
865 | return -ENODEV; | |
866 | ||
867 | pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0xF8); | |
868 | pci_set_master(dev); | |
869 | ||
870 | card->dev = dev; | |
871 | card->card_number = num_cards; | |
872 | ||
873 | card->csr_base = pci_resource_start(dev, 0); | |
874 | card->csr_len = pci_resource_len(dev, 0); | |
875 | #ifdef CONFIG_MM_MAP_MEMORY | |
876 | card->mem_base = pci_resource_start(dev, 1); | |
877 | card->mem_len = pci_resource_len(dev, 1); | |
878 | #endif | |
879 | ||
880 | printk(KERN_INFO "Micro Memory(tm) controller #%d found at %02x:%02x (PCI Mem Module (Battery Backup))\n", | |
881 | card->card_number, dev->bus->number, dev->devfn); | |
882 | ||
910638ae MG |
883 | if (pci_set_dma_mask(dev, DMA_64BIT_MASK) && |
884 | pci_set_dma_mask(dev, DMA_32BIT_MASK)) { | |
1da177e4 LT |
885 | printk(KERN_WARNING "MM%d: NO suitable DMA found\n",num_cards); |
886 | return -ENOMEM; | |
887 | } | |
888 | if (!request_mem_region(card->csr_base, card->csr_len, "Micro Memory")) { | |
889 | printk(KERN_ERR "MM%d: Unable to request memory region\n", card->card_number); | |
890 | ret = -ENOMEM; | |
891 | ||
892 | goto failed_req_csr; | |
893 | } | |
894 | ||
895 | card->csr_remap = ioremap_nocache(card->csr_base, card->csr_len); | |
896 | if (!card->csr_remap) { | |
897 | printk(KERN_ERR "MM%d: Unable to remap memory region\n", card->card_number); | |
898 | ret = -ENOMEM; | |
899 | ||
900 | goto failed_remap_csr; | |
901 | } | |
902 | ||
903 | printk(KERN_INFO "MM%d: CSR 0x%08lx -> 0x%p (0x%lx)\n", card->card_number, | |
904 | card->csr_base, card->csr_remap, card->csr_len); | |
905 | ||
906 | #ifdef CONFIG_MM_MAP_MEMORY | |
907 | if (!request_mem_region(card->mem_base, card->mem_len, "Micro Memory")) { | |
908 | printk(KERN_ERR "MM%d: Unable to request memory region\n", card->card_number); | |
909 | ret = -ENOMEM; | |
910 | ||
911 | goto failed_req_mem; | |
912 | } | |
913 | ||
914 | if (!(card->mem_remap = ioremap(card->mem_base, cards->mem_len))) { | |
915 | printk(KERN_ERR "MM%d: Unable to remap memory region\n", card->card_number); | |
916 | ret = -ENOMEM; | |
917 | ||
918 | goto failed_remap_mem; | |
919 | } | |
920 | ||
921 | printk(KERN_INFO "MM%d: MEM 0x%8lx -> 0x%8lx (0x%lx)\n", card->card_number, | |
922 | card->mem_base, card->mem_remap, card->mem_len); | |
923 | #else | |
924 | printk(KERN_INFO "MM%d: MEM area not remapped (CONFIG_MM_MAP_MEMORY not set)\n", | |
925 | card->card_number); | |
926 | #endif | |
927 | switch(card->dev->device) { | |
928 | case 0x5415: | |
929 | card->flags |= UM_FLAG_NO_BYTE_STATUS | UM_FLAG_NO_BATTREG; | |
930 | magic_number = 0x59; | |
931 | break; | |
932 | ||
933 | case 0x5425: | |
934 | card->flags |= UM_FLAG_NO_BYTE_STATUS; | |
935 | magic_number = 0x5C; | |
936 | break; | |
937 | ||
938 | case 0x6155: | |
939 | card->flags |= UM_FLAG_NO_BYTE_STATUS | UM_FLAG_NO_BATTREG | UM_FLAG_NO_BATT; | |
940 | magic_number = 0x99; | |
941 | break; | |
942 | ||
943 | default: | |
944 | magic_number = 0x100; | |
945 | break; | |
946 | } | |
947 | ||
948 | if (readb(card->csr_remap + MEMCTRLSTATUS_MAGIC) != magic_number) { | |
949 | printk(KERN_ERR "MM%d: Magic number invalid\n", card->card_number); | |
950 | ret = -ENOMEM; | |
951 | goto failed_magic; | |
952 | } | |
953 | ||
954 | card->mm_pages[0].desc = pci_alloc_consistent(card->dev, | |
955 | PAGE_SIZE*2, | |
956 | &card->mm_pages[0].page_dma); | |
957 | card->mm_pages[1].desc = pci_alloc_consistent(card->dev, | |
958 | PAGE_SIZE*2, | |
959 | &card->mm_pages[1].page_dma); | |
960 | if (card->mm_pages[0].desc == NULL || | |
961 | card->mm_pages[1].desc == NULL) { | |
962 | printk(KERN_ERR "MM%d: alloc failed\n", card->card_number); | |
963 | goto failed_alloc; | |
964 | } | |
965 | reset_page(&card->mm_pages[0]); | |
966 | reset_page(&card->mm_pages[1]); | |
967 | card->Ready = 0; /* page 0 is ready */ | |
968 | card->Active = -1; /* no page is active */ | |
969 | card->bio = NULL; | |
970 | card->biotail = &card->bio; | |
971 | ||
972 | card->queue = blk_alloc_queue(GFP_KERNEL); | |
973 | if (!card->queue) | |
974 | goto failed_alloc; | |
975 | ||
976 | blk_queue_make_request(card->queue, mm_make_request); | |
977 | card->queue->queuedata = card; | |
978 | card->queue->unplug_fn = mm_unplug_device; | |
979 | ||
980 | tasklet_init(&card->tasklet, process_page, (unsigned long)card); | |
981 | ||
982 | card->check_batteries = 0; | |
983 | ||
984 | mem_present = readb(card->csr_remap + MEMCTRLSTATUS_MEMORY); | |
985 | switch (mem_present) { | |
986 | case MEM_128_MB: | |
987 | card->mm_size = 1024 * 128; | |
988 | break; | |
989 | case MEM_256_MB: | |
990 | card->mm_size = 1024 * 256; | |
991 | break; | |
992 | case MEM_512_MB: | |
993 | card->mm_size = 1024 * 512; | |
994 | break; | |
995 | case MEM_1_GB: | |
996 | card->mm_size = 1024 * 1024; | |
997 | break; | |
998 | case MEM_2_GB: | |
999 | card->mm_size = 1024 * 2048; | |
1000 | break; | |
1001 | default: | |
1002 | card->mm_size = 0; | |
1003 | break; | |
1004 | } | |
1005 | ||
1006 | /* Clear the LED's we control */ | |
1007 | set_led(card, LED_REMOVE, LED_OFF); | |
1008 | set_led(card, LED_FAULT, LED_OFF); | |
1009 | ||
1010 | batt_status = readb(card->csr_remap + MEMCTRLSTATUS_BATTERY); | |
1011 | ||
1012 | card->battery[0].good = !(batt_status & BATTERY_1_FAILURE); | |
1013 | card->battery[1].good = !(batt_status & BATTERY_2_FAILURE); | |
1014 | card->battery[0].last_change = card->battery[1].last_change = jiffies; | |
1015 | ||
1016 | if (card->flags & UM_FLAG_NO_BATT) | |
1017 | printk(KERN_INFO "MM%d: Size %d KB\n", | |
1018 | card->card_number, card->mm_size); | |
1019 | else { | |
1020 | printk(KERN_INFO "MM%d: Size %d KB, Battery 1 %s (%s), Battery 2 %s (%s)\n", | |
1021 | card->card_number, card->mm_size, | |
1022 | (batt_status & BATTERY_1_DISABLED ? "Disabled" : "Enabled"), | |
1023 | card->battery[0].good ? "OK" : "FAILURE", | |
1024 | (batt_status & BATTERY_2_DISABLED ? "Disabled" : "Enabled"), | |
1025 | card->battery[1].good ? "OK" : "FAILURE"); | |
1026 | ||
1027 | set_fault_to_battery_status(card); | |
1028 | } | |
1029 | ||
1030 | pci_read_config_dword(dev, PCI_BASE_ADDRESS_1, &saved_bar); | |
1031 | data = 0xffffffff; | |
1032 | pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, data); | |
1033 | pci_read_config_dword(dev, PCI_BASE_ADDRESS_1, &data); | |
1034 | pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, saved_bar); | |
1035 | data &= 0xfffffff0; | |
1036 | data = ~data; | |
1037 | data += 1; | |
1038 | ||
1039 | card->win_size = data; | |
1040 | ||
1041 | ||
69ab3912 | 1042 | if (request_irq(dev->irq, mm_interrupt, IRQF_SHARED, "pci-umem", card)) { |
1da177e4 LT |
1043 | printk(KERN_ERR "MM%d: Unable to allocate IRQ\n", card->card_number); |
1044 | ret = -ENODEV; | |
1045 | ||
1046 | goto failed_req_irq; | |
1047 | } | |
1048 | ||
1049 | card->irq = dev->irq; | |
1050 | printk(KERN_INFO "MM%d: Window size %d bytes, IRQ %d\n", card->card_number, | |
1051 | card->win_size, card->irq); | |
1052 | ||
1053 | spin_lock_init(&card->lock); | |
1054 | ||
1055 | pci_set_drvdata(dev, card); | |
1056 | ||
1057 | if (pci_write_cmd != 0x0F) /* If not Memory Write & Invalidate */ | |
1058 | pci_write_cmd = 0x07; /* then Memory Write command */ | |
1059 | ||
1060 | if (pci_write_cmd & 0x08) { /* use Memory Write and Invalidate */ | |
1061 | unsigned short cfg_command; | |
1062 | pci_read_config_word(dev, PCI_COMMAND, &cfg_command); | |
1063 | cfg_command |= 0x10; /* Memory Write & Invalidate Enable */ | |
1064 | pci_write_config_word(dev, PCI_COMMAND, cfg_command); | |
1065 | } | |
1066 | pci_cmds = (pci_read_cmd << 28) | (pci_write_cmd << 24); | |
1067 | ||
1068 | num_cards++; | |
1069 | ||
1070 | if (!get_userbit(card, MEMORY_INITIALIZED)) { | |
1071 | printk(KERN_INFO "MM%d: memory NOT initialized. Consider over-writing whole device.\n", card->card_number); | |
1072 | card->init_size = 0; | |
1073 | } else { | |
1074 | printk(KERN_INFO "MM%d: memory already initialized\n", card->card_number); | |
1075 | card->init_size = card->mm_size; | |
1076 | } | |
1077 | ||
1078 | /* Enable ECC */ | |
1079 | writeb(EDC_STORE_CORRECT, card->csr_remap + MEMCTRLCMD_ERRCTRL); | |
1080 | ||
1081 | return 0; | |
1082 | ||
1083 | failed_req_irq: | |
1084 | failed_alloc: | |
1085 | if (card->mm_pages[0].desc) | |
1086 | pci_free_consistent(card->dev, PAGE_SIZE*2, | |
1087 | card->mm_pages[0].desc, | |
1088 | card->mm_pages[0].page_dma); | |
1089 | if (card->mm_pages[1].desc) | |
1090 | pci_free_consistent(card->dev, PAGE_SIZE*2, | |
1091 | card->mm_pages[1].desc, | |
1092 | card->mm_pages[1].page_dma); | |
1093 | failed_magic: | |
1094 | #ifdef CONFIG_MM_MAP_MEMORY | |
1095 | iounmap(card->mem_remap); | |
1096 | failed_remap_mem: | |
1097 | release_mem_region(card->mem_base, card->mem_len); | |
1098 | failed_req_mem: | |
1099 | #endif | |
1100 | iounmap(card->csr_remap); | |
1101 | failed_remap_csr: | |
1102 | release_mem_region(card->csr_base, card->csr_len); | |
1103 | failed_req_csr: | |
1104 | ||
1105 | return ret; | |
1106 | } | |
1107 | /* | |
1108 | ----------------------------------------------------------------------------------- | |
1109 | -- mm_pci_remove | |
1110 | ----------------------------------------------------------------------------------- | |
1111 | */ | |
1112 | static void mm_pci_remove(struct pci_dev *dev) | |
1113 | { | |
1114 | struct cardinfo *card = pci_get_drvdata(dev); | |
1115 | ||
1116 | tasklet_kill(&card->tasklet); | |
1117 | iounmap(card->csr_remap); | |
1118 | release_mem_region(card->csr_base, card->csr_len); | |
1119 | #ifdef CONFIG_MM_MAP_MEMORY | |
1120 | iounmap(card->mem_remap); | |
1121 | release_mem_region(card->mem_base, card->mem_len); | |
1122 | #endif | |
1123 | free_irq(card->irq, card); | |
1124 | ||
1125 | if (card->mm_pages[0].desc) | |
1126 | pci_free_consistent(card->dev, PAGE_SIZE*2, | |
1127 | card->mm_pages[0].desc, | |
1128 | card->mm_pages[0].page_dma); | |
1129 | if (card->mm_pages[1].desc) | |
1130 | pci_free_consistent(card->dev, PAGE_SIZE*2, | |
1131 | card->mm_pages[1].desc, | |
1132 | card->mm_pages[1].page_dma); | |
1312f40e | 1133 | blk_cleanup_queue(card->queue); |
1da177e4 LT |
1134 | } |
1135 | ||
1136 | static const struct pci_device_id mm_pci_ids[] = { { | |
1137 | .vendor = PCI_VENDOR_ID_MICRO_MEMORY, | |
1138 | .device = PCI_DEVICE_ID_MICRO_MEMORY_5415CN, | |
1139 | }, { | |
1140 | .vendor = PCI_VENDOR_ID_MICRO_MEMORY, | |
1141 | .device = PCI_DEVICE_ID_MICRO_MEMORY_5425CN, | |
1142 | }, { | |
1143 | .vendor = PCI_VENDOR_ID_MICRO_MEMORY, | |
1144 | .device = PCI_DEVICE_ID_MICRO_MEMORY_6155, | |
1145 | }, { | |
1146 | .vendor = 0x8086, | |
1147 | .device = 0xB555, | |
1148 | .subvendor= 0x1332, | |
1149 | .subdevice= 0x5460, | |
1150 | .class = 0x050000, | |
1151 | .class_mask= 0, | |
1152 | }, { /* end: all zeroes */ } | |
1153 | }; | |
1154 | ||
1155 | MODULE_DEVICE_TABLE(pci, mm_pci_ids); | |
1156 | ||
1157 | static struct pci_driver mm_pci_driver = { | |
1158 | .name = "umem", | |
1159 | .id_table = mm_pci_ids, | |
1160 | .probe = mm_pci_probe, | |
1161 | .remove = mm_pci_remove, | |
1162 | }; | |
1163 | /* | |
1164 | ----------------------------------------------------------------------------------- | |
1165 | -- mm_init | |
1166 | ----------------------------------------------------------------------------------- | |
1167 | */ | |
1168 | ||
1169 | static int __init mm_init(void) | |
1170 | { | |
1171 | int retval, i; | |
1172 | int err; | |
1173 | ||
1174 | printk(KERN_INFO DRIVER_VERSION " : " DRIVER_DESC "\n"); | |
1175 | ||
9bfab8ce | 1176 | retval = pci_register_driver(&mm_pci_driver); |
1da177e4 LT |
1177 | if (retval) |
1178 | return -ENOMEM; | |
1179 | ||
1180 | err = major_nr = register_blkdev(0, "umem"); | |
5a243e0e N |
1181 | if (err < 0) { |
1182 | pci_unregister_driver(&mm_pci_driver); | |
1da177e4 | 1183 | return -EIO; |
5a243e0e | 1184 | } |
1da177e4 LT |
1185 | |
1186 | for (i = 0; i < num_cards; i++) { | |
1187 | mm_gendisk[i] = alloc_disk(1 << MM_SHIFT); | |
1188 | if (!mm_gendisk[i]) | |
1189 | goto out; | |
1190 | } | |
1191 | ||
1192 | for (i = 0; i < num_cards; i++) { | |
1193 | struct gendisk *disk = mm_gendisk[i]; | |
1194 | sprintf(disk->disk_name, "umem%c", 'a'+i); | |
1da177e4 LT |
1195 | spin_lock_init(&cards[i].lock); |
1196 | disk->major = major_nr; | |
1197 | disk->first_minor = i << MM_SHIFT; | |
1198 | disk->fops = &mm_fops; | |
1199 | disk->private_data = &cards[i]; | |
1200 | disk->queue = cards[i].queue; | |
1201 | set_capacity(disk, cards[i].mm_size << 1); | |
1202 | add_disk(disk); | |
1203 | } | |
1204 | ||
1205 | init_battery_timer(); | |
1206 | printk("MM: desc_per_page = %ld\n", DESC_PER_PAGE); | |
1207 | /* printk("mm_init: Done. 10-19-01 9:00\n"); */ | |
1208 | return 0; | |
1209 | ||
1210 | out: | |
5a243e0e | 1211 | pci_unregister_driver(&mm_pci_driver); |
1da177e4 LT |
1212 | unregister_blkdev(major_nr, "umem"); |
1213 | while (i--) | |
1214 | put_disk(mm_gendisk[i]); | |
1215 | return -ENOMEM; | |
1216 | } | |
1217 | /* | |
1218 | ----------------------------------------------------------------------------------- | |
1219 | -- mm_cleanup | |
1220 | ----------------------------------------------------------------------------------- | |
1221 | */ | |
1222 | static void __exit mm_cleanup(void) | |
1223 | { | |
1224 | int i; | |
1225 | ||
1226 | del_battery_timer(); | |
1227 | ||
1228 | for (i=0; i < num_cards ; i++) { | |
1229 | del_gendisk(mm_gendisk[i]); | |
1230 | put_disk(mm_gendisk[i]); | |
1231 | } | |
1232 | ||
1233 | pci_unregister_driver(&mm_pci_driver); | |
1234 | ||
1235 | unregister_blkdev(major_nr, "umem"); | |
1236 | } | |
1237 | ||
1238 | module_init(mm_init); | |
1239 | module_exit(mm_cleanup); | |
1240 | ||
1241 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
1242 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1243 | MODULE_LICENSE("GPL"); |