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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 | ||
37 | #include <linux/config.h> | |
38 | #include <linux/sched.h> | |
39 | #include <linux/fs.h> | |
40 | #include <linux/bio.h> | |
41 | #include <linux/kernel.h> | |
42 | #include <linux/mm.h> | |
43 | #include <linux/mman.h> | |
44 | #include <linux/ioctl.h> | |
45 | #include <linux/module.h> | |
46 | #include <linux/init.h> | |
47 | #include <linux/interrupt.h> | |
48 | #include <linux/smp_lock.h> | |
49 | #include <linux/timer.h> | |
50 | #include <linux/pci.h> | |
51 | #include <linux/slab.h> | |
52 | ||
53 | #include <linux/fcntl.h> /* O_ACCMODE */ | |
54 | #include <linux/hdreg.h> /* HDIO_GETGEO */ | |
55 | ||
56 | #include <linux/umem.h> | |
57 | ||
58 | #include <asm/uaccess.h> | |
59 | #include <asm/io.h> | |
60 | ||
61 | #define PRINTK(x...) do {} while (0) | |
62 | #define dprintk(x...) do {} while (0) | |
63 | /*#define dprintk(x...) printk(x) */ | |
64 | ||
65 | #define MM_MAXCARDS 4 | |
66 | #define MM_RAHEAD 2 /* two sectors */ | |
67 | #define MM_BLKSIZE 1024 /* 1k blocks */ | |
68 | #define MM_HARDSECT 512 /* 512-byte hardware sectors */ | |
69 | #define MM_SHIFT 6 /* max 64 partitions on 4 cards */ | |
70 | ||
71 | /* | |
72 | * Version Information | |
73 | */ | |
74 | ||
75 | #define DRIVER_VERSION "v2.3" | |
76 | #define DRIVER_AUTHOR "San Mehat, Johannes Erdfelt, NeilBrown" | |
77 | #define DRIVER_DESC "Micro Memory(tm) PCI memory board block driver" | |
78 | ||
79 | static int debug; | |
80 | /* #define HW_TRACE(x) writeb(x,cards[0].csr_remap + MEMCTRLSTATUS_MAGIC) */ | |
81 | #define HW_TRACE(x) | |
82 | ||
83 | #define DEBUG_LED_ON_TRANSFER 0x01 | |
84 | #define DEBUG_BATTERY_POLLING 0x02 | |
85 | ||
86 | module_param(debug, int, 0644); | |
87 | MODULE_PARM_DESC(debug, "Debug bitmask"); | |
88 | ||
89 | static int pci_read_cmd = 0x0C; /* Read Multiple */ | |
90 | module_param(pci_read_cmd, int, 0); | |
91 | MODULE_PARM_DESC(pci_read_cmd, "PCI read command"); | |
92 | ||
93 | static int pci_write_cmd = 0x0F; /* Write and Invalidate */ | |
94 | module_param(pci_write_cmd, int, 0); | |
95 | MODULE_PARM_DESC(pci_write_cmd, "PCI write command"); | |
96 | ||
97 | static int pci_cmds; | |
98 | ||
99 | static int major_nr; | |
100 | ||
101 | #include <linux/blkdev.h> | |
102 | #include <linux/blkpg.h> | |
103 | ||
104 | struct cardinfo { | |
105 | int card_number; | |
106 | struct pci_dev *dev; | |
107 | ||
108 | int irq; | |
109 | ||
110 | unsigned long csr_base; | |
111 | unsigned char __iomem *csr_remap; | |
112 | unsigned long csr_len; | |
113 | #ifdef CONFIG_MM_MAP_MEMORY | |
114 | unsigned long mem_base; | |
115 | unsigned char __iomem *mem_remap; | |
116 | unsigned long mem_len; | |
117 | #endif | |
118 | ||
119 | unsigned int win_size; /* PCI window size */ | |
120 | unsigned int mm_size; /* size in kbytes */ | |
121 | ||
122 | unsigned int init_size; /* initial segment, in sectors, | |
123 | * that we know to | |
124 | * have been written | |
125 | */ | |
126 | struct bio *bio, *currentbio, **biotail; | |
127 | ||
128 | request_queue_t *queue; | |
129 | ||
130 | struct mm_page { | |
131 | dma_addr_t page_dma; | |
132 | struct mm_dma_desc *desc; | |
133 | int cnt, headcnt; | |
134 | struct bio *bio, **biotail; | |
135 | } mm_pages[2]; | |
136 | #define DESC_PER_PAGE ((PAGE_SIZE*2)/sizeof(struct mm_dma_desc)) | |
137 | ||
138 | int Active, Ready; | |
139 | ||
140 | struct tasklet_struct tasklet; | |
141 | unsigned int dma_status; | |
142 | ||
143 | struct { | |
144 | int good; | |
145 | int warned; | |
146 | unsigned long last_change; | |
147 | } battery[2]; | |
148 | ||
149 | spinlock_t lock; | |
150 | int check_batteries; | |
151 | ||
152 | int flags; | |
153 | }; | |
154 | ||
155 | static struct cardinfo cards[MM_MAXCARDS]; | |
156 | static struct block_device_operations mm_fops; | |
157 | static struct timer_list battery_timer; | |
158 | ||
159 | static int num_cards = 0; | |
160 | ||
161 | static struct gendisk *mm_gendisk[MM_MAXCARDS]; | |
162 | ||
163 | static void check_batteries(struct cardinfo *card); | |
164 | ||
165 | /* | |
166 | ----------------------------------------------------------------------------------- | |
167 | -- get_userbit | |
168 | ----------------------------------------------------------------------------------- | |
169 | */ | |
170 | static int get_userbit(struct cardinfo *card, int bit) | |
171 | { | |
172 | unsigned char led; | |
173 | ||
174 | led = readb(card->csr_remap + MEMCTRLCMD_LEDCTRL); | |
175 | return led & bit; | |
176 | } | |
177 | /* | |
178 | ----------------------------------------------------------------------------------- | |
179 | -- set_userbit | |
180 | ----------------------------------------------------------------------------------- | |
181 | */ | |
182 | static int set_userbit(struct cardinfo *card, int bit, unsigned char state) | |
183 | { | |
184 | unsigned char led; | |
185 | ||
186 | led = readb(card->csr_remap + MEMCTRLCMD_LEDCTRL); | |
187 | if (state) | |
188 | led |= bit; | |
189 | else | |
190 | led &= ~bit; | |
191 | writeb(led, card->csr_remap + MEMCTRLCMD_LEDCTRL); | |
192 | ||
193 | return 0; | |
194 | } | |
195 | /* | |
196 | ----------------------------------------------------------------------------------- | |
197 | -- set_led | |
198 | ----------------------------------------------------------------------------------- | |
199 | */ | |
200 | /* | |
201 | * NOTE: For the power LED, use the LED_POWER_* macros since they differ | |
202 | */ | |
203 | static void set_led(struct cardinfo *card, int shift, unsigned char state) | |
204 | { | |
205 | unsigned char led; | |
206 | ||
207 | led = readb(card->csr_remap + MEMCTRLCMD_LEDCTRL); | |
208 | if (state == LED_FLIP) | |
209 | led ^= (1<<shift); | |
210 | else { | |
211 | led &= ~(0x03 << shift); | |
212 | led |= (state << shift); | |
213 | } | |
214 | writeb(led, card->csr_remap + MEMCTRLCMD_LEDCTRL); | |
215 | ||
216 | } | |
217 | ||
218 | #ifdef MM_DIAG | |
219 | /* | |
220 | ----------------------------------------------------------------------------------- | |
221 | -- dump_regs | |
222 | ----------------------------------------------------------------------------------- | |
223 | */ | |
224 | static void dump_regs(struct cardinfo *card) | |
225 | { | |
226 | unsigned char *p; | |
227 | int i, i1; | |
228 | ||
229 | p = card->csr_remap; | |
230 | for (i = 0; i < 8; i++) { | |
231 | printk(KERN_DEBUG "%p ", p); | |
232 | ||
233 | for (i1 = 0; i1 < 16; i1++) | |
234 | printk("%02x ", *p++); | |
235 | ||
236 | printk("\n"); | |
237 | } | |
238 | } | |
239 | #endif | |
240 | /* | |
241 | ----------------------------------------------------------------------------------- | |
242 | -- dump_dmastat | |
243 | ----------------------------------------------------------------------------------- | |
244 | */ | |
245 | static void dump_dmastat(struct cardinfo *card, unsigned int dmastat) | |
246 | { | |
247 | printk(KERN_DEBUG "MM%d*: DMAstat - ", card->card_number); | |
248 | if (dmastat & DMASCR_ANY_ERR) | |
249 | printk("ANY_ERR "); | |
250 | if (dmastat & DMASCR_MBE_ERR) | |
251 | printk("MBE_ERR "); | |
252 | if (dmastat & DMASCR_PARITY_ERR_REP) | |
253 | printk("PARITY_ERR_REP "); | |
254 | if (dmastat & DMASCR_PARITY_ERR_DET) | |
255 | printk("PARITY_ERR_DET "); | |
256 | if (dmastat & DMASCR_SYSTEM_ERR_SIG) | |
257 | printk("SYSTEM_ERR_SIG "); | |
258 | if (dmastat & DMASCR_TARGET_ABT) | |
259 | printk("TARGET_ABT "); | |
260 | if (dmastat & DMASCR_MASTER_ABT) | |
261 | printk("MASTER_ABT "); | |
262 | if (dmastat & DMASCR_CHAIN_COMPLETE) | |
263 | printk("CHAIN_COMPLETE "); | |
264 | if (dmastat & DMASCR_DMA_COMPLETE) | |
265 | printk("DMA_COMPLETE "); | |
266 | printk("\n"); | |
267 | } | |
268 | ||
269 | /* | |
270 | * Theory of request handling | |
271 | * | |
272 | * Each bio is assigned to one mm_dma_desc - which may not be enough FIXME | |
273 | * We have two pages of mm_dma_desc, holding about 64 descriptors | |
274 | * each. These are allocated at init time. | |
275 | * One page is "Ready" and is either full, or can have request added. | |
276 | * The other page might be "Active", which DMA is happening on it. | |
277 | * | |
278 | * Whenever IO on the active page completes, the Ready page is activated | |
279 | * and the ex-Active page is clean out and made Ready. | |
280 | * Otherwise the Ready page is only activated when it becomes full, or | |
281 | * when mm_unplug_device is called via the unplug_io_fn. | |
282 | * | |
283 | * If a request arrives while both pages a full, it is queued, and b_rdev is | |
284 | * overloaded to record whether it was a read or a write. | |
285 | * | |
286 | * The interrupt handler only polls the device to clear the interrupt. | |
287 | * The processing of the result is done in a tasklet. | |
288 | */ | |
289 | ||
290 | static void mm_start_io(struct cardinfo *card) | |
291 | { | |
292 | /* we have the lock, we know there is | |
293 | * no IO active, and we know that card->Active | |
294 | * is set | |
295 | */ | |
296 | struct mm_dma_desc *desc; | |
297 | struct mm_page *page; | |
298 | int offset; | |
299 | ||
300 | /* make the last descriptor end the chain */ | |
301 | page = &card->mm_pages[card->Active]; | |
302 | PRINTK("start_io: %d %d->%d\n", card->Active, page->headcnt, page->cnt-1); | |
303 | desc = &page->desc[page->cnt-1]; | |
304 | ||
305 | desc->control_bits |= cpu_to_le32(DMASCR_CHAIN_COMP_EN); | |
306 | desc->control_bits &= ~cpu_to_le32(DMASCR_CHAIN_EN); | |
307 | desc->sem_control_bits = desc->control_bits; | |
308 | ||
309 | ||
310 | if (debug & DEBUG_LED_ON_TRANSFER) | |
311 | set_led(card, LED_REMOVE, LED_ON); | |
312 | ||
313 | desc = &page->desc[page->headcnt]; | |
314 | writel(0, card->csr_remap + DMA_PCI_ADDR); | |
315 | writel(0, card->csr_remap + DMA_PCI_ADDR + 4); | |
316 | ||
317 | writel(0, card->csr_remap + DMA_LOCAL_ADDR); | |
318 | writel(0, card->csr_remap + DMA_LOCAL_ADDR + 4); | |
319 | ||
320 | writel(0, card->csr_remap + DMA_TRANSFER_SIZE); | |
321 | writel(0, card->csr_remap + DMA_TRANSFER_SIZE + 4); | |
322 | ||
323 | writel(0, card->csr_remap + DMA_SEMAPHORE_ADDR); | |
324 | writel(0, card->csr_remap + DMA_SEMAPHORE_ADDR + 4); | |
325 | ||
326 | offset = ((char*)desc) - ((char*)page->desc); | |
327 | writel(cpu_to_le32((page->page_dma+offset)&0xffffffff), | |
328 | card->csr_remap + DMA_DESCRIPTOR_ADDR); | |
329 | /* Force the value to u64 before shifting otherwise >> 32 is undefined C | |
330 | * and on some ports will do nothing ! */ | |
331 | writel(cpu_to_le32(((u64)page->page_dma)>>32), | |
332 | card->csr_remap + DMA_DESCRIPTOR_ADDR + 4); | |
333 | ||
334 | /* Go, go, go */ | |
335 | writel(cpu_to_le32(DMASCR_GO | DMASCR_CHAIN_EN | pci_cmds), | |
336 | card->csr_remap + DMA_STATUS_CTRL); | |
337 | } | |
338 | ||
339 | static int add_bio(struct cardinfo *card); | |
340 | ||
341 | static void activate(struct cardinfo *card) | |
342 | { | |
343 | /* if No page is Active, and Ready is | |
344 | * not empty, then switch Ready page | |
345 | * to active and start IO. | |
346 | * Then add any bh's that are available to Ready | |
347 | */ | |
348 | ||
349 | do { | |
350 | while (add_bio(card)) | |
351 | ; | |
352 | ||
353 | if (card->Active == -1 && | |
354 | card->mm_pages[card->Ready].cnt > 0) { | |
355 | card->Active = card->Ready; | |
356 | card->Ready = 1-card->Ready; | |
357 | mm_start_io(card); | |
358 | } | |
359 | ||
360 | } while (card->Active == -1 && add_bio(card)); | |
361 | } | |
362 | ||
363 | static inline void reset_page(struct mm_page *page) | |
364 | { | |
365 | page->cnt = 0; | |
366 | page->headcnt = 0; | |
367 | page->bio = NULL; | |
368 | page->biotail = & page->bio; | |
369 | } | |
370 | ||
371 | static void mm_unplug_device(request_queue_t *q) | |
372 | { | |
373 | struct cardinfo *card = q->queuedata; | |
374 | unsigned long flags; | |
375 | ||
376 | spin_lock_irqsave(&card->lock, flags); | |
377 | if (blk_remove_plug(q)) | |
378 | activate(card); | |
379 | spin_unlock_irqrestore(&card->lock, flags); | |
380 | } | |
381 | ||
382 | /* | |
383 | * If there is room on Ready page, take | |
384 | * one bh off list and add it. | |
385 | * return 1 if there was room, else 0. | |
386 | */ | |
387 | static int add_bio(struct cardinfo *card) | |
388 | { | |
389 | struct mm_page *p; | |
390 | struct mm_dma_desc *desc; | |
391 | dma_addr_t dma_handle; | |
392 | int offset; | |
393 | struct bio *bio; | |
394 | int rw; | |
395 | int len; | |
396 | ||
397 | bio = card->currentbio; | |
398 | if (!bio && card->bio) { | |
399 | card->currentbio = card->bio; | |
400 | card->bio = card->bio->bi_next; | |
401 | if (card->bio == NULL) | |
402 | card->biotail = &card->bio; | |
403 | card->currentbio->bi_next = NULL; | |
404 | return 1; | |
405 | } | |
406 | if (!bio) | |
407 | return 0; | |
408 | ||
409 | rw = bio_rw(bio); | |
410 | if (card->mm_pages[card->Ready].cnt >= DESC_PER_PAGE) | |
411 | return 0; | |
412 | ||
413 | len = bio_iovec(bio)->bv_len; | |
414 | dma_handle = pci_map_page(card->dev, | |
415 | bio_page(bio), | |
416 | bio_offset(bio), | |
417 | len, | |
418 | (rw==READ) ? | |
419 | PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE); | |
420 | ||
421 | p = &card->mm_pages[card->Ready]; | |
422 | desc = &p->desc[p->cnt]; | |
423 | p->cnt++; | |
424 | if ((p->biotail) != &bio->bi_next) { | |
425 | *(p->biotail) = bio; | |
426 | p->biotail = &(bio->bi_next); | |
427 | bio->bi_next = NULL; | |
428 | } | |
429 | ||
430 | desc->data_dma_handle = dma_handle; | |
431 | ||
432 | desc->pci_addr = cpu_to_le64((u64)desc->data_dma_handle); | |
433 | desc->local_addr= cpu_to_le64(bio->bi_sector << 9); | |
434 | desc->transfer_size = cpu_to_le32(len); | |
435 | offset = ( ((char*)&desc->sem_control_bits) - ((char*)p->desc)); | |
436 | desc->sem_addr = cpu_to_le64((u64)(p->page_dma+offset)); | |
437 | desc->zero1 = desc->zero2 = 0; | |
438 | offset = ( ((char*)(desc+1)) - ((char*)p->desc)); | |
439 | desc->next_desc_addr = cpu_to_le64(p->page_dma+offset); | |
440 | desc->control_bits = cpu_to_le32(DMASCR_GO|DMASCR_ERR_INT_EN| | |
441 | DMASCR_PARITY_INT_EN| | |
442 | DMASCR_CHAIN_EN | | |
443 | DMASCR_SEM_EN | | |
444 | pci_cmds); | |
445 | if (rw == WRITE) | |
446 | desc->control_bits |= cpu_to_le32(DMASCR_TRANSFER_READ); | |
447 | desc->sem_control_bits = desc->control_bits; | |
448 | ||
449 | bio->bi_sector += (len>>9); | |
450 | bio->bi_size -= len; | |
451 | bio->bi_idx++; | |
452 | if (bio->bi_idx >= bio->bi_vcnt) | |
453 | card->currentbio = NULL; | |
454 | ||
455 | return 1; | |
456 | } | |
457 | ||
458 | static void process_page(unsigned long data) | |
459 | { | |
460 | /* check if any of the requests in the page are DMA_COMPLETE, | |
461 | * and deal with them appropriately. | |
462 | * If we find a descriptor without DMA_COMPLETE in the semaphore, then | |
463 | * dma must have hit an error on that descriptor, so use dma_status instead | |
464 | * and assume that all following descriptors must be re-tried. | |
465 | */ | |
466 | struct mm_page *page; | |
467 | struct bio *return_bio=NULL; | |
468 | struct cardinfo *card = (struct cardinfo *)data; | |
469 | unsigned int dma_status = card->dma_status; | |
470 | ||
471 | spin_lock_bh(&card->lock); | |
472 | if (card->Active < 0) | |
473 | goto out_unlock; | |
474 | page = &card->mm_pages[card->Active]; | |
475 | ||
476 | while (page->headcnt < page->cnt) { | |
477 | struct bio *bio = page->bio; | |
478 | struct mm_dma_desc *desc = &page->desc[page->headcnt]; | |
479 | int control = le32_to_cpu(desc->sem_control_bits); | |
480 | int last=0; | |
481 | int idx; | |
482 | ||
483 | if (!(control & DMASCR_DMA_COMPLETE)) { | |
484 | control = dma_status; | |
485 | last=1; | |
486 | } | |
487 | page->headcnt++; | |
488 | idx = bio->bi_phys_segments; | |
489 | bio->bi_phys_segments++; | |
490 | if (bio->bi_phys_segments >= bio->bi_vcnt) | |
491 | page->bio = bio->bi_next; | |
492 | ||
493 | pci_unmap_page(card->dev, desc->data_dma_handle, | |
494 | bio_iovec_idx(bio,idx)->bv_len, | |
495 | (control& DMASCR_TRANSFER_READ) ? | |
496 | PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); | |
497 | if (control & DMASCR_HARD_ERROR) { | |
498 | /* error */ | |
499 | clear_bit(BIO_UPTODATE, &bio->bi_flags); | |
500 | printk(KERN_WARNING "MM%d: I/O error on sector %d/%d\n", | |
501 | card->card_number, | |
502 | le32_to_cpu(desc->local_addr)>>9, | |
503 | le32_to_cpu(desc->transfer_size)); | |
504 | dump_dmastat(card, control); | |
505 | } else if (test_bit(BIO_RW, &bio->bi_rw) && | |
506 | le32_to_cpu(desc->local_addr)>>9 == card->init_size) { | |
507 | card->init_size += le32_to_cpu(desc->transfer_size)>>9; | |
508 | if (card->init_size>>1 >= card->mm_size) { | |
509 | printk(KERN_INFO "MM%d: memory now initialised\n", | |
510 | card->card_number); | |
511 | set_userbit(card, MEMORY_INITIALIZED, 1); | |
512 | } | |
513 | } | |
514 | if (bio != page->bio) { | |
515 | bio->bi_next = return_bio; | |
516 | return_bio = bio; | |
517 | } | |
518 | ||
519 | if (last) break; | |
520 | } | |
521 | ||
522 | if (debug & DEBUG_LED_ON_TRANSFER) | |
523 | set_led(card, LED_REMOVE, LED_OFF); | |
524 | ||
525 | if (card->check_batteries) { | |
526 | card->check_batteries = 0; | |
527 | check_batteries(card); | |
528 | } | |
529 | if (page->headcnt >= page->cnt) { | |
530 | reset_page(page); | |
531 | card->Active = -1; | |
532 | activate(card); | |
533 | } else { | |
534 | /* haven't finished with this one yet */ | |
535 | PRINTK("do some more\n"); | |
536 | mm_start_io(card); | |
537 | } | |
538 | out_unlock: | |
539 | spin_unlock_bh(&card->lock); | |
540 | ||
541 | while(return_bio) { | |
542 | struct bio *bio = return_bio; | |
543 | ||
544 | return_bio = bio->bi_next; | |
545 | bio->bi_next = NULL; | |
546 | bio_endio(bio, bio->bi_size, 0); | |
547 | } | |
548 | } | |
549 | ||
550 | /* | |
551 | ----------------------------------------------------------------------------------- | |
552 | -- mm_make_request | |
553 | ----------------------------------------------------------------------------------- | |
554 | */ | |
555 | static int mm_make_request(request_queue_t *q, struct bio *bio) | |
556 | { | |
557 | struct cardinfo *card = q->queuedata; | |
558 | PRINTK("mm_make_request %ld %d\n", bh->b_rsector, bh->b_size); | |
559 | ||
560 | bio->bi_phys_segments = bio->bi_idx; /* count of completed segments*/ | |
561 | spin_lock_irq(&card->lock); | |
562 | *card->biotail = bio; | |
563 | bio->bi_next = NULL; | |
564 | card->biotail = &bio->bi_next; | |
565 | blk_plug_device(q); | |
566 | spin_unlock_irq(&card->lock); | |
567 | ||
568 | return 0; | |
569 | } | |
570 | ||
571 | /* | |
572 | ----------------------------------------------------------------------------------- | |
573 | -- mm_interrupt | |
574 | ----------------------------------------------------------------------------------- | |
575 | */ | |
576 | static irqreturn_t mm_interrupt(int irq, void *__card, struct pt_regs *regs) | |
577 | { | |
578 | struct cardinfo *card = (struct cardinfo *) __card; | |
579 | unsigned int dma_status; | |
580 | unsigned short cfg_status; | |
581 | ||
582 | HW_TRACE(0x30); | |
583 | ||
584 | dma_status = le32_to_cpu(readl(card->csr_remap + DMA_STATUS_CTRL)); | |
585 | ||
586 | if (!(dma_status & (DMASCR_ERROR_MASK | DMASCR_CHAIN_COMPLETE))) { | |
587 | /* interrupt wasn't for me ... */ | |
588 | return IRQ_NONE; | |
589 | } | |
590 | ||
591 | /* clear COMPLETION interrupts */ | |
592 | if (card->flags & UM_FLAG_NO_BYTE_STATUS) | |
593 | writel(cpu_to_le32(DMASCR_DMA_COMPLETE|DMASCR_CHAIN_COMPLETE), | |
594 | card->csr_remap+ DMA_STATUS_CTRL); | |
595 | else | |
596 | writeb((DMASCR_DMA_COMPLETE|DMASCR_CHAIN_COMPLETE) >> 16, | |
597 | card->csr_remap+ DMA_STATUS_CTRL + 2); | |
598 | ||
599 | /* log errors and clear interrupt status */ | |
600 | if (dma_status & DMASCR_ANY_ERR) { | |
601 | unsigned int data_log1, data_log2; | |
602 | unsigned int addr_log1, addr_log2; | |
603 | unsigned char stat, count, syndrome, check; | |
604 | ||
605 | stat = readb(card->csr_remap + MEMCTRLCMD_ERRSTATUS); | |
606 | ||
607 | data_log1 = le32_to_cpu(readl(card->csr_remap + ERROR_DATA_LOG)); | |
608 | data_log2 = le32_to_cpu(readl(card->csr_remap + ERROR_DATA_LOG + 4)); | |
609 | addr_log1 = le32_to_cpu(readl(card->csr_remap + ERROR_ADDR_LOG)); | |
610 | addr_log2 = readb(card->csr_remap + ERROR_ADDR_LOG + 4); | |
611 | ||
612 | count = readb(card->csr_remap + ERROR_COUNT); | |
613 | syndrome = readb(card->csr_remap + ERROR_SYNDROME); | |
614 | check = readb(card->csr_remap + ERROR_CHECK); | |
615 | ||
616 | dump_dmastat(card, dma_status); | |
617 | ||
618 | if (stat & 0x01) | |
619 | printk(KERN_ERR "MM%d*: Memory access error detected (err count %d)\n", | |
620 | card->card_number, count); | |
621 | if (stat & 0x02) | |
622 | printk(KERN_ERR "MM%d*: Multi-bit EDC error\n", | |
623 | card->card_number); | |
624 | ||
625 | printk(KERN_ERR "MM%d*: Fault Address 0x%02x%08x, Fault Data 0x%08x%08x\n", | |
626 | card->card_number, addr_log2, addr_log1, data_log2, data_log1); | |
627 | printk(KERN_ERR "MM%d*: Fault Check 0x%02x, Fault Syndrome 0x%02x\n", | |
628 | card->card_number, check, syndrome); | |
629 | ||
630 | writeb(0, card->csr_remap + ERROR_COUNT); | |
631 | } | |
632 | ||
633 | if (dma_status & DMASCR_PARITY_ERR_REP) { | |
634 | printk(KERN_ERR "MM%d*: PARITY ERROR REPORTED\n", card->card_number); | |
635 | pci_read_config_word(card->dev, PCI_STATUS, &cfg_status); | |
636 | pci_write_config_word(card->dev, PCI_STATUS, cfg_status); | |
637 | } | |
638 | ||
639 | if (dma_status & DMASCR_PARITY_ERR_DET) { | |
640 | printk(KERN_ERR "MM%d*: PARITY ERROR DETECTED\n", card->card_number); | |
641 | pci_read_config_word(card->dev, PCI_STATUS, &cfg_status); | |
642 | pci_write_config_word(card->dev, PCI_STATUS, cfg_status); | |
643 | } | |
644 | ||
645 | if (dma_status & DMASCR_SYSTEM_ERR_SIG) { | |
646 | printk(KERN_ERR "MM%d*: SYSTEM ERROR\n", card->card_number); | |
647 | pci_read_config_word(card->dev, PCI_STATUS, &cfg_status); | |
648 | pci_write_config_word(card->dev, PCI_STATUS, cfg_status); | |
649 | } | |
650 | ||
651 | if (dma_status & DMASCR_TARGET_ABT) { | |
652 | printk(KERN_ERR "MM%d*: TARGET ABORT\n", card->card_number); | |
653 | pci_read_config_word(card->dev, PCI_STATUS, &cfg_status); | |
654 | pci_write_config_word(card->dev, PCI_STATUS, cfg_status); | |
655 | } | |
656 | ||
657 | if (dma_status & DMASCR_MASTER_ABT) { | |
658 | printk(KERN_ERR "MM%d*: MASTER ABORT\n", card->card_number); | |
659 | pci_read_config_word(card->dev, PCI_STATUS, &cfg_status); | |
660 | pci_write_config_word(card->dev, PCI_STATUS, cfg_status); | |
661 | } | |
662 | ||
663 | /* and process the DMA descriptors */ | |
664 | card->dma_status = dma_status; | |
665 | tasklet_schedule(&card->tasklet); | |
666 | ||
667 | HW_TRACE(0x36); | |
668 | ||
669 | return IRQ_HANDLED; | |
670 | } | |
671 | /* | |
672 | ----------------------------------------------------------------------------------- | |
673 | -- set_fault_to_battery_status | |
674 | ----------------------------------------------------------------------------------- | |
675 | */ | |
676 | /* | |
677 | * If both batteries are good, no LED | |
678 | * If either battery has been warned, solid LED | |
679 | * If both batteries are bad, flash the LED quickly | |
680 | * If either battery is bad, flash the LED semi quickly | |
681 | */ | |
682 | static void set_fault_to_battery_status(struct cardinfo *card) | |
683 | { | |
684 | if (card->battery[0].good && card->battery[1].good) | |
685 | set_led(card, LED_FAULT, LED_OFF); | |
686 | else if (card->battery[0].warned || card->battery[1].warned) | |
687 | set_led(card, LED_FAULT, LED_ON); | |
688 | else if (!card->battery[0].good && !card->battery[1].good) | |
689 | set_led(card, LED_FAULT, LED_FLASH_7_0); | |
690 | else | |
691 | set_led(card, LED_FAULT, LED_FLASH_3_5); | |
692 | } | |
693 | ||
694 | static void init_battery_timer(void); | |
695 | ||
696 | ||
697 | /* | |
698 | ----------------------------------------------------------------------------------- | |
699 | -- check_battery | |
700 | ----------------------------------------------------------------------------------- | |
701 | */ | |
702 | static int check_battery(struct cardinfo *card, int battery, int status) | |
703 | { | |
704 | if (status != card->battery[battery].good) { | |
705 | card->battery[battery].good = !card->battery[battery].good; | |
706 | card->battery[battery].last_change = jiffies; | |
707 | ||
708 | if (card->battery[battery].good) { | |
709 | printk(KERN_ERR "MM%d: Battery %d now good\n", | |
710 | card->card_number, battery + 1); | |
711 | card->battery[battery].warned = 0; | |
712 | } else | |
713 | printk(KERN_ERR "MM%d: Battery %d now FAILED\n", | |
714 | card->card_number, battery + 1); | |
715 | ||
716 | return 1; | |
717 | } else if (!card->battery[battery].good && | |
718 | !card->battery[battery].warned && | |
719 | time_after_eq(jiffies, card->battery[battery].last_change + | |
720 | (HZ * 60 * 60 * 5))) { | |
721 | printk(KERN_ERR "MM%d: Battery %d still FAILED after 5 hours\n", | |
722 | card->card_number, battery + 1); | |
723 | card->battery[battery].warned = 1; | |
724 | ||
725 | return 1; | |
726 | } | |
727 | ||
728 | return 0; | |
729 | } | |
730 | /* | |
731 | ----------------------------------------------------------------------------------- | |
732 | -- check_batteries | |
733 | ----------------------------------------------------------------------------------- | |
734 | */ | |
735 | static void check_batteries(struct cardinfo *card) | |
736 | { | |
737 | /* NOTE: this must *never* be called while the card | |
738 | * is doing (bus-to-card) DMA, or you will need the | |
739 | * reset switch | |
740 | */ | |
741 | unsigned char status; | |
742 | int ret1, ret2; | |
743 | ||
744 | status = readb(card->csr_remap + MEMCTRLSTATUS_BATTERY); | |
745 | if (debug & DEBUG_BATTERY_POLLING) | |
746 | printk(KERN_DEBUG "MM%d: checking battery status, 1 = %s, 2 = %s\n", | |
747 | card->card_number, | |
748 | (status & BATTERY_1_FAILURE) ? "FAILURE" : "OK", | |
749 | (status & BATTERY_2_FAILURE) ? "FAILURE" : "OK"); | |
750 | ||
751 | ret1 = check_battery(card, 0, !(status & BATTERY_1_FAILURE)); | |
752 | ret2 = check_battery(card, 1, !(status & BATTERY_2_FAILURE)); | |
753 | ||
754 | if (ret1 || ret2) | |
755 | set_fault_to_battery_status(card); | |
756 | } | |
757 | ||
758 | static void check_all_batteries(unsigned long ptr) | |
759 | { | |
760 | int i; | |
761 | ||
762 | for (i = 0; i < num_cards; i++) | |
763 | if (!(cards[i].flags & UM_FLAG_NO_BATT)) { | |
764 | struct cardinfo *card = &cards[i]; | |
765 | spin_lock_bh(&card->lock); | |
766 | if (card->Active >= 0) | |
767 | card->check_batteries = 1; | |
768 | else | |
769 | check_batteries(card); | |
770 | spin_unlock_bh(&card->lock); | |
771 | } | |
772 | ||
773 | init_battery_timer(); | |
774 | } | |
775 | /* | |
776 | ----------------------------------------------------------------------------------- | |
777 | -- init_battery_timer | |
778 | ----------------------------------------------------------------------------------- | |
779 | */ | |
780 | static void init_battery_timer(void) | |
781 | { | |
782 | init_timer(&battery_timer); | |
783 | battery_timer.function = check_all_batteries; | |
784 | battery_timer.expires = jiffies + (HZ * 60); | |
785 | add_timer(&battery_timer); | |
786 | } | |
787 | /* | |
788 | ----------------------------------------------------------------------------------- | |
789 | -- del_battery_timer | |
790 | ----------------------------------------------------------------------------------- | |
791 | */ | |
792 | static void del_battery_timer(void) | |
793 | { | |
794 | del_timer(&battery_timer); | |
795 | } | |
796 | /* | |
797 | ----------------------------------------------------------------------------------- | |
798 | -- mm_revalidate | |
799 | ----------------------------------------------------------------------------------- | |
800 | */ | |
801 | /* | |
802 | * Note no locks taken out here. In a worst case scenario, we could drop | |
803 | * a chunk of system memory. But that should never happen, since validation | |
804 | * happens at open or mount time, when locks are held. | |
805 | * | |
806 | * That's crap, since doing that while some partitions are opened | |
807 | * or mounted will give you really nasty results. | |
808 | */ | |
809 | static int mm_revalidate(struct gendisk *disk) | |
810 | { | |
811 | struct cardinfo *card = disk->private_data; | |
812 | set_capacity(disk, card->mm_size << 1); | |
813 | return 0; | |
814 | } | |
815 | /* | |
816 | ----------------------------------------------------------------------------------- | |
817 | -- mm_ioctl | |
818 | ----------------------------------------------------------------------------------- | |
819 | */ | |
820 | static int mm_ioctl(struct inode *i, struct file *f, unsigned int cmd, unsigned long arg) | |
821 | { | |
822 | if (cmd == HDIO_GETGEO) { | |
823 | struct cardinfo *card = i->i_bdev->bd_disk->private_data; | |
824 | int size = card->mm_size * (1024 / MM_HARDSECT); | |
825 | struct hd_geometry geo; | |
826 | /* | |
827 | * get geometry: we have to fake one... trim the size to a | |
828 | * multiple of 2048 (1M): tell we have 32 sectors, 64 heads, | |
829 | * whatever cylinders. | |
830 | */ | |
831 | geo.heads = 64; | |
832 | geo.sectors = 32; | |
833 | geo.start = get_start_sect(i->i_bdev); | |
834 | geo.cylinders = size / (geo.heads * geo.sectors); | |
835 | ||
836 | if (copy_to_user((void __user *) arg, &geo, sizeof(geo))) | |
837 | return -EFAULT; | |
838 | return 0; | |
839 | } | |
840 | ||
841 | return -EINVAL; | |
842 | } | |
843 | /* | |
844 | ----------------------------------------------------------------------------------- | |
845 | -- mm_check_change | |
846 | ----------------------------------------------------------------------------------- | |
847 | Future support for removable devices | |
848 | */ | |
849 | static int mm_check_change(struct gendisk *disk) | |
850 | { | |
851 | /* struct cardinfo *dev = disk->private_data; */ | |
852 | return 0; | |
853 | } | |
854 | /* | |
855 | ----------------------------------------------------------------------------------- | |
856 | -- mm_fops | |
857 | ----------------------------------------------------------------------------------- | |
858 | */ | |
859 | static struct block_device_operations mm_fops = { | |
860 | .owner = THIS_MODULE, | |
861 | .ioctl = mm_ioctl, | |
862 | .revalidate_disk= mm_revalidate, | |
863 | .media_changed = mm_check_change, | |
864 | }; | |
865 | /* | |
866 | ----------------------------------------------------------------------------------- | |
867 | -- mm_pci_probe | |
868 | ----------------------------------------------------------------------------------- | |
869 | */ | |
870 | static int __devinit mm_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) | |
871 | { | |
872 | int ret = -ENODEV; | |
873 | struct cardinfo *card = &cards[num_cards]; | |
874 | unsigned char mem_present; | |
875 | unsigned char batt_status; | |
876 | unsigned int saved_bar, data; | |
877 | int magic_number; | |
878 | ||
879 | if (pci_enable_device(dev) < 0) | |
880 | return -ENODEV; | |
881 | ||
882 | pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0xF8); | |
883 | pci_set_master(dev); | |
884 | ||
885 | card->dev = dev; | |
886 | card->card_number = num_cards; | |
887 | ||
888 | card->csr_base = pci_resource_start(dev, 0); | |
889 | card->csr_len = pci_resource_len(dev, 0); | |
890 | #ifdef CONFIG_MM_MAP_MEMORY | |
891 | card->mem_base = pci_resource_start(dev, 1); | |
892 | card->mem_len = pci_resource_len(dev, 1); | |
893 | #endif | |
894 | ||
895 | printk(KERN_INFO "Micro Memory(tm) controller #%d found at %02x:%02x (PCI Mem Module (Battery Backup))\n", | |
896 | card->card_number, dev->bus->number, dev->devfn); | |
897 | ||
898 | if (pci_set_dma_mask(dev, 0xffffffffffffffffLL) && | |
899 | !pci_set_dma_mask(dev, 0xffffffffLL)) { | |
900 | printk(KERN_WARNING "MM%d: NO suitable DMA found\n",num_cards); | |
901 | return -ENOMEM; | |
902 | } | |
903 | if (!request_mem_region(card->csr_base, card->csr_len, "Micro Memory")) { | |
904 | printk(KERN_ERR "MM%d: Unable to request memory region\n", card->card_number); | |
905 | ret = -ENOMEM; | |
906 | ||
907 | goto failed_req_csr; | |
908 | } | |
909 | ||
910 | card->csr_remap = ioremap_nocache(card->csr_base, card->csr_len); | |
911 | if (!card->csr_remap) { | |
912 | printk(KERN_ERR "MM%d: Unable to remap memory region\n", card->card_number); | |
913 | ret = -ENOMEM; | |
914 | ||
915 | goto failed_remap_csr; | |
916 | } | |
917 | ||
918 | printk(KERN_INFO "MM%d: CSR 0x%08lx -> 0x%p (0x%lx)\n", card->card_number, | |
919 | card->csr_base, card->csr_remap, card->csr_len); | |
920 | ||
921 | #ifdef CONFIG_MM_MAP_MEMORY | |
922 | if (!request_mem_region(card->mem_base, card->mem_len, "Micro Memory")) { | |
923 | printk(KERN_ERR "MM%d: Unable to request memory region\n", card->card_number); | |
924 | ret = -ENOMEM; | |
925 | ||
926 | goto failed_req_mem; | |
927 | } | |
928 | ||
929 | if (!(card->mem_remap = ioremap(card->mem_base, cards->mem_len))) { | |
930 | printk(KERN_ERR "MM%d: Unable to remap memory region\n", card->card_number); | |
931 | ret = -ENOMEM; | |
932 | ||
933 | goto failed_remap_mem; | |
934 | } | |
935 | ||
936 | printk(KERN_INFO "MM%d: MEM 0x%8lx -> 0x%8lx (0x%lx)\n", card->card_number, | |
937 | card->mem_base, card->mem_remap, card->mem_len); | |
938 | #else | |
939 | printk(KERN_INFO "MM%d: MEM area not remapped (CONFIG_MM_MAP_MEMORY not set)\n", | |
940 | card->card_number); | |
941 | #endif | |
942 | switch(card->dev->device) { | |
943 | case 0x5415: | |
944 | card->flags |= UM_FLAG_NO_BYTE_STATUS | UM_FLAG_NO_BATTREG; | |
945 | magic_number = 0x59; | |
946 | break; | |
947 | ||
948 | case 0x5425: | |
949 | card->flags |= UM_FLAG_NO_BYTE_STATUS; | |
950 | magic_number = 0x5C; | |
951 | break; | |
952 | ||
953 | case 0x6155: | |
954 | card->flags |= UM_FLAG_NO_BYTE_STATUS | UM_FLAG_NO_BATTREG | UM_FLAG_NO_BATT; | |
955 | magic_number = 0x99; | |
956 | break; | |
957 | ||
958 | default: | |
959 | magic_number = 0x100; | |
960 | break; | |
961 | } | |
962 | ||
963 | if (readb(card->csr_remap + MEMCTRLSTATUS_MAGIC) != magic_number) { | |
964 | printk(KERN_ERR "MM%d: Magic number invalid\n", card->card_number); | |
965 | ret = -ENOMEM; | |
966 | goto failed_magic; | |
967 | } | |
968 | ||
969 | card->mm_pages[0].desc = pci_alloc_consistent(card->dev, | |
970 | PAGE_SIZE*2, | |
971 | &card->mm_pages[0].page_dma); | |
972 | card->mm_pages[1].desc = pci_alloc_consistent(card->dev, | |
973 | PAGE_SIZE*2, | |
974 | &card->mm_pages[1].page_dma); | |
975 | if (card->mm_pages[0].desc == NULL || | |
976 | card->mm_pages[1].desc == NULL) { | |
977 | printk(KERN_ERR "MM%d: alloc failed\n", card->card_number); | |
978 | goto failed_alloc; | |
979 | } | |
980 | reset_page(&card->mm_pages[0]); | |
981 | reset_page(&card->mm_pages[1]); | |
982 | card->Ready = 0; /* page 0 is ready */ | |
983 | card->Active = -1; /* no page is active */ | |
984 | card->bio = NULL; | |
985 | card->biotail = &card->bio; | |
986 | ||
987 | card->queue = blk_alloc_queue(GFP_KERNEL); | |
988 | if (!card->queue) | |
989 | goto failed_alloc; | |
990 | ||
991 | blk_queue_make_request(card->queue, mm_make_request); | |
992 | card->queue->queuedata = card; | |
993 | card->queue->unplug_fn = mm_unplug_device; | |
994 | ||
995 | tasklet_init(&card->tasklet, process_page, (unsigned long)card); | |
996 | ||
997 | card->check_batteries = 0; | |
998 | ||
999 | mem_present = readb(card->csr_remap + MEMCTRLSTATUS_MEMORY); | |
1000 | switch (mem_present) { | |
1001 | case MEM_128_MB: | |
1002 | card->mm_size = 1024 * 128; | |
1003 | break; | |
1004 | case MEM_256_MB: | |
1005 | card->mm_size = 1024 * 256; | |
1006 | break; | |
1007 | case MEM_512_MB: | |
1008 | card->mm_size = 1024 * 512; | |
1009 | break; | |
1010 | case MEM_1_GB: | |
1011 | card->mm_size = 1024 * 1024; | |
1012 | break; | |
1013 | case MEM_2_GB: | |
1014 | card->mm_size = 1024 * 2048; | |
1015 | break; | |
1016 | default: | |
1017 | card->mm_size = 0; | |
1018 | break; | |
1019 | } | |
1020 | ||
1021 | /* Clear the LED's we control */ | |
1022 | set_led(card, LED_REMOVE, LED_OFF); | |
1023 | set_led(card, LED_FAULT, LED_OFF); | |
1024 | ||
1025 | batt_status = readb(card->csr_remap + MEMCTRLSTATUS_BATTERY); | |
1026 | ||
1027 | card->battery[0].good = !(batt_status & BATTERY_1_FAILURE); | |
1028 | card->battery[1].good = !(batt_status & BATTERY_2_FAILURE); | |
1029 | card->battery[0].last_change = card->battery[1].last_change = jiffies; | |
1030 | ||
1031 | if (card->flags & UM_FLAG_NO_BATT) | |
1032 | printk(KERN_INFO "MM%d: Size %d KB\n", | |
1033 | card->card_number, card->mm_size); | |
1034 | else { | |
1035 | printk(KERN_INFO "MM%d: Size %d KB, Battery 1 %s (%s), Battery 2 %s (%s)\n", | |
1036 | card->card_number, card->mm_size, | |
1037 | (batt_status & BATTERY_1_DISABLED ? "Disabled" : "Enabled"), | |
1038 | card->battery[0].good ? "OK" : "FAILURE", | |
1039 | (batt_status & BATTERY_2_DISABLED ? "Disabled" : "Enabled"), | |
1040 | card->battery[1].good ? "OK" : "FAILURE"); | |
1041 | ||
1042 | set_fault_to_battery_status(card); | |
1043 | } | |
1044 | ||
1045 | pci_read_config_dword(dev, PCI_BASE_ADDRESS_1, &saved_bar); | |
1046 | data = 0xffffffff; | |
1047 | pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, data); | |
1048 | pci_read_config_dword(dev, PCI_BASE_ADDRESS_1, &data); | |
1049 | pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, saved_bar); | |
1050 | data &= 0xfffffff0; | |
1051 | data = ~data; | |
1052 | data += 1; | |
1053 | ||
1054 | card->win_size = data; | |
1055 | ||
1056 | ||
1057 | if (request_irq(dev->irq, mm_interrupt, SA_SHIRQ, "pci-umem", card)) { | |
1058 | printk(KERN_ERR "MM%d: Unable to allocate IRQ\n", card->card_number); | |
1059 | ret = -ENODEV; | |
1060 | ||
1061 | goto failed_req_irq; | |
1062 | } | |
1063 | ||
1064 | card->irq = dev->irq; | |
1065 | printk(KERN_INFO "MM%d: Window size %d bytes, IRQ %d\n", card->card_number, | |
1066 | card->win_size, card->irq); | |
1067 | ||
1068 | spin_lock_init(&card->lock); | |
1069 | ||
1070 | pci_set_drvdata(dev, card); | |
1071 | ||
1072 | if (pci_write_cmd != 0x0F) /* If not Memory Write & Invalidate */ | |
1073 | pci_write_cmd = 0x07; /* then Memory Write command */ | |
1074 | ||
1075 | if (pci_write_cmd & 0x08) { /* use Memory Write and Invalidate */ | |
1076 | unsigned short cfg_command; | |
1077 | pci_read_config_word(dev, PCI_COMMAND, &cfg_command); | |
1078 | cfg_command |= 0x10; /* Memory Write & Invalidate Enable */ | |
1079 | pci_write_config_word(dev, PCI_COMMAND, cfg_command); | |
1080 | } | |
1081 | pci_cmds = (pci_read_cmd << 28) | (pci_write_cmd << 24); | |
1082 | ||
1083 | num_cards++; | |
1084 | ||
1085 | if (!get_userbit(card, MEMORY_INITIALIZED)) { | |
1086 | printk(KERN_INFO "MM%d: memory NOT initialized. Consider over-writing whole device.\n", card->card_number); | |
1087 | card->init_size = 0; | |
1088 | } else { | |
1089 | printk(KERN_INFO "MM%d: memory already initialized\n", card->card_number); | |
1090 | card->init_size = card->mm_size; | |
1091 | } | |
1092 | ||
1093 | /* Enable ECC */ | |
1094 | writeb(EDC_STORE_CORRECT, card->csr_remap + MEMCTRLCMD_ERRCTRL); | |
1095 | ||
1096 | return 0; | |
1097 | ||
1098 | failed_req_irq: | |
1099 | failed_alloc: | |
1100 | if (card->mm_pages[0].desc) | |
1101 | pci_free_consistent(card->dev, PAGE_SIZE*2, | |
1102 | card->mm_pages[0].desc, | |
1103 | card->mm_pages[0].page_dma); | |
1104 | if (card->mm_pages[1].desc) | |
1105 | pci_free_consistent(card->dev, PAGE_SIZE*2, | |
1106 | card->mm_pages[1].desc, | |
1107 | card->mm_pages[1].page_dma); | |
1108 | failed_magic: | |
1109 | #ifdef CONFIG_MM_MAP_MEMORY | |
1110 | iounmap(card->mem_remap); | |
1111 | failed_remap_mem: | |
1112 | release_mem_region(card->mem_base, card->mem_len); | |
1113 | failed_req_mem: | |
1114 | #endif | |
1115 | iounmap(card->csr_remap); | |
1116 | failed_remap_csr: | |
1117 | release_mem_region(card->csr_base, card->csr_len); | |
1118 | failed_req_csr: | |
1119 | ||
1120 | return ret; | |
1121 | } | |
1122 | /* | |
1123 | ----------------------------------------------------------------------------------- | |
1124 | -- mm_pci_remove | |
1125 | ----------------------------------------------------------------------------------- | |
1126 | */ | |
1127 | static void mm_pci_remove(struct pci_dev *dev) | |
1128 | { | |
1129 | struct cardinfo *card = pci_get_drvdata(dev); | |
1130 | ||
1131 | tasklet_kill(&card->tasklet); | |
1132 | iounmap(card->csr_remap); | |
1133 | release_mem_region(card->csr_base, card->csr_len); | |
1134 | #ifdef CONFIG_MM_MAP_MEMORY | |
1135 | iounmap(card->mem_remap); | |
1136 | release_mem_region(card->mem_base, card->mem_len); | |
1137 | #endif | |
1138 | free_irq(card->irq, card); | |
1139 | ||
1140 | if (card->mm_pages[0].desc) | |
1141 | pci_free_consistent(card->dev, PAGE_SIZE*2, | |
1142 | card->mm_pages[0].desc, | |
1143 | card->mm_pages[0].page_dma); | |
1144 | if (card->mm_pages[1].desc) | |
1145 | pci_free_consistent(card->dev, PAGE_SIZE*2, | |
1146 | card->mm_pages[1].desc, | |
1147 | card->mm_pages[1].page_dma); | |
1148 | blk_put_queue(card->queue); | |
1149 | } | |
1150 | ||
1151 | static const struct pci_device_id mm_pci_ids[] = { { | |
1152 | .vendor = PCI_VENDOR_ID_MICRO_MEMORY, | |
1153 | .device = PCI_DEVICE_ID_MICRO_MEMORY_5415CN, | |
1154 | }, { | |
1155 | .vendor = PCI_VENDOR_ID_MICRO_MEMORY, | |
1156 | .device = PCI_DEVICE_ID_MICRO_MEMORY_5425CN, | |
1157 | }, { | |
1158 | .vendor = PCI_VENDOR_ID_MICRO_MEMORY, | |
1159 | .device = PCI_DEVICE_ID_MICRO_MEMORY_6155, | |
1160 | }, { | |
1161 | .vendor = 0x8086, | |
1162 | .device = 0xB555, | |
1163 | .subvendor= 0x1332, | |
1164 | .subdevice= 0x5460, | |
1165 | .class = 0x050000, | |
1166 | .class_mask= 0, | |
1167 | }, { /* end: all zeroes */ } | |
1168 | }; | |
1169 | ||
1170 | MODULE_DEVICE_TABLE(pci, mm_pci_ids); | |
1171 | ||
1172 | static struct pci_driver mm_pci_driver = { | |
1173 | .name = "umem", | |
1174 | .id_table = mm_pci_ids, | |
1175 | .probe = mm_pci_probe, | |
1176 | .remove = mm_pci_remove, | |
1177 | }; | |
1178 | /* | |
1179 | ----------------------------------------------------------------------------------- | |
1180 | -- mm_init | |
1181 | ----------------------------------------------------------------------------------- | |
1182 | */ | |
1183 | ||
1184 | static int __init mm_init(void) | |
1185 | { | |
1186 | int retval, i; | |
1187 | int err; | |
1188 | ||
1189 | printk(KERN_INFO DRIVER_VERSION " : " DRIVER_DESC "\n"); | |
1190 | ||
1191 | retval = pci_module_init(&mm_pci_driver); | |
1192 | if (retval) | |
1193 | return -ENOMEM; | |
1194 | ||
1195 | err = major_nr = register_blkdev(0, "umem"); | |
1196 | if (err < 0) | |
1197 | return -EIO; | |
1198 | ||
1199 | for (i = 0; i < num_cards; i++) { | |
1200 | mm_gendisk[i] = alloc_disk(1 << MM_SHIFT); | |
1201 | if (!mm_gendisk[i]) | |
1202 | goto out; | |
1203 | } | |
1204 | ||
1205 | for (i = 0; i < num_cards; i++) { | |
1206 | struct gendisk *disk = mm_gendisk[i]; | |
1207 | sprintf(disk->disk_name, "umem%c", 'a'+i); | |
1208 | sprintf(disk->devfs_name, "umem/card%d", i); | |
1209 | spin_lock_init(&cards[i].lock); | |
1210 | disk->major = major_nr; | |
1211 | disk->first_minor = i << MM_SHIFT; | |
1212 | disk->fops = &mm_fops; | |
1213 | disk->private_data = &cards[i]; | |
1214 | disk->queue = cards[i].queue; | |
1215 | set_capacity(disk, cards[i].mm_size << 1); | |
1216 | add_disk(disk); | |
1217 | } | |
1218 | ||
1219 | init_battery_timer(); | |
1220 | printk("MM: desc_per_page = %ld\n", DESC_PER_PAGE); | |
1221 | /* printk("mm_init: Done. 10-19-01 9:00\n"); */ | |
1222 | return 0; | |
1223 | ||
1224 | out: | |
1225 | unregister_blkdev(major_nr, "umem"); | |
1226 | while (i--) | |
1227 | put_disk(mm_gendisk[i]); | |
1228 | return -ENOMEM; | |
1229 | } | |
1230 | /* | |
1231 | ----------------------------------------------------------------------------------- | |
1232 | -- mm_cleanup | |
1233 | ----------------------------------------------------------------------------------- | |
1234 | */ | |
1235 | static void __exit mm_cleanup(void) | |
1236 | { | |
1237 | int i; | |
1238 | ||
1239 | del_battery_timer(); | |
1240 | ||
1241 | for (i=0; i < num_cards ; i++) { | |
1242 | del_gendisk(mm_gendisk[i]); | |
1243 | put_disk(mm_gendisk[i]); | |
1244 | } | |
1245 | ||
1246 | pci_unregister_driver(&mm_pci_driver); | |
1247 | ||
1248 | unregister_blkdev(major_nr, "umem"); | |
1249 | } | |
1250 | ||
1251 | module_init(mm_init); | |
1252 | module_exit(mm_cleanup); | |
1253 | ||
1254 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
1255 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1256 | MODULE_LICENSE("GPL"); |