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