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