]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * mm.c - Micro Memory(tm) PCI memory board block device driver - v2.3 | |
3 | * | |
4 | * (C) 2001 San Mehat <nettwerk@valinux.com> | |
5 | * (C) 2001 Johannes Erdfelt <jerdfelt@valinux.com> | |
6 | * (C) 2001 NeilBrown <neilb@cse.unsw.edu.au> | |
7 | * | |
8 | * This driver for the Micro Memory PCI Memory Module with Battery Backup | |
9 | * is Copyright Micro Memory Inc 2001-2002. All rights reserved. | |
10 | * | |
11 | * This driver is released to the public under the terms of the | |
12 | * GNU GENERAL PUBLIC LICENSE version 2 | |
13 | * See the file COPYING for details. | |
14 | * | |
15 | * This driver provides a standard block device interface for Micro Memory(tm) | |
16 | * PCI based RAM boards. | |
17 | * 10/05/01: Phap Nguyen - Rebuilt the driver | |
18 | * 10/22/01: Phap Nguyen - v2.1 Added disk partitioning | |
19 | * 29oct2001:NeilBrown - Use make_request_fn instead of request_fn | |
20 | * - use stand disk partitioning (so fdisk works). | |
21 | * 08nov2001:NeilBrown - change driver name from "mm" to "umem" | |
22 | * - incorporate into main kernel | |
23 | * 08apr2002:NeilBrown - Move some of interrupt handle to tasklet | |
24 | * - use spin_lock_bh instead of _irq | |
25 | * - Never block on make_request. queue | |
26 | * bh's instead. | |
27 | * - unregister umem from devfs at mod unload | |
28 | * - Change version to 2.3 | |
29 | * 07Nov2001:Phap Nguyen - Select pci read command: 06, 12, 15 (Decimal) | |
30 | * 07Jan2002: P. Nguyen - Used PCI Memory Write & Invalidate for DMA | |
31 | * 15May2002:NeilBrown - convert to bio for 2.5 | |
32 | * 17May2002:NeilBrown - remove init_mem initialisation. Instead detect | |
33 | * - a sequence of writes that cover the card, and | |
34 | * - set initialised bit then. | |
35 | */ | |
36 | ||
46308c0b | 37 | //#define DEBUG /* uncomment if you want debugging info (pr_debug) */ |
1da177e4 LT |
38 | #include <linux/fs.h> |
39 | #include <linux/bio.h> | |
40 | #include <linux/kernel.h> | |
41 | #include <linux/mm.h> | |
42 | #include <linux/mman.h> | |
43 | #include <linux/ioctl.h> | |
44 | #include <linux/module.h> | |
45 | #include <linux/init.h> | |
46 | #include <linux/interrupt.h> | |
1da177e4 LT |
47 | #include <linux/timer.h> |
48 | #include <linux/pci.h> | |
49 | #include <linux/slab.h> | |
910638ae | 50 | #include <linux/dma-mapping.h> |
1da177e4 LT |
51 | |
52 | #include <linux/fcntl.h> /* O_ACCMODE */ | |
53 | #include <linux/hdreg.h> /* HDIO_GETGEO */ | |
54 | ||
3084f0c6 | 55 | #include "umem.h" |
1da177e4 LT |
56 | |
57 | #include <asm/uaccess.h> | |
58 | #include <asm/io.h> | |
59 | ||
1da177e4 LT |
60 | #define MM_MAXCARDS 4 |
61 | #define MM_RAHEAD 2 /* two sectors */ | |
62 | #define MM_BLKSIZE 1024 /* 1k blocks */ | |
63 | #define MM_HARDSECT 512 /* 512-byte hardware sectors */ | |
64 | #define MM_SHIFT 6 /* max 64 partitions on 4 cards */ | |
65 | ||
66 | /* | |
67 | * Version Information | |
68 | */ | |
69 | ||
70 | #define DRIVER_VERSION "v2.3" | |
71 | #define DRIVER_AUTHOR "San Mehat, Johannes Erdfelt, NeilBrown" | |
72 | #define DRIVER_DESC "Micro Memory(tm) PCI memory board block driver" | |
73 | ||
74 | static int debug; | |
75 | /* #define HW_TRACE(x) writeb(x,cards[0].csr_remap + MEMCTRLSTATUS_MAGIC) */ | |
76 | #define HW_TRACE(x) | |
77 | ||
78 | #define DEBUG_LED_ON_TRANSFER 0x01 | |
79 | #define DEBUG_BATTERY_POLLING 0x02 | |
80 | ||
81 | module_param(debug, int, 0644); | |
82 | MODULE_PARM_DESC(debug, "Debug bitmask"); | |
83 | ||
84 | static int pci_read_cmd = 0x0C; /* Read Multiple */ | |
85 | module_param(pci_read_cmd, int, 0); | |
86 | MODULE_PARM_DESC(pci_read_cmd, "PCI read command"); | |
87 | ||
88 | static int pci_write_cmd = 0x0F; /* Write and Invalidate */ | |
89 | module_param(pci_write_cmd, int, 0); | |
90 | MODULE_PARM_DESC(pci_write_cmd, "PCI write command"); | |
91 | ||
92 | static int pci_cmds; | |
93 | ||
94 | static int major_nr; | |
95 | ||
96 | #include <linux/blkdev.h> | |
97 | #include <linux/blkpg.h> | |
98 | ||
99 | struct cardinfo { | |
1da177e4 LT |
100 | struct pci_dev *dev; |
101 | ||
102 | int irq; | |
103 | ||
104 | unsigned long csr_base; | |
105 | unsigned char __iomem *csr_remap; | |
106 | unsigned long csr_len; | |
1da177e4 LT |
107 | unsigned int win_size; /* PCI window size */ |
108 | unsigned int mm_size; /* size in kbytes */ | |
109 | ||
110 | unsigned int init_size; /* initial segment, in sectors, | |
111 | * that we know to | |
112 | * have been written | |
113 | */ | |
114 | struct bio *bio, *currentbio, **biotail; | |
eea9befa N |
115 | int current_idx; |
116 | sector_t current_sector; | |
1da177e4 | 117 | |
165125e1 | 118 | struct request_queue *queue; |
1da177e4 LT |
119 | |
120 | struct mm_page { | |
121 | dma_addr_t page_dma; | |
122 | struct mm_dma_desc *desc; | |
123 | int cnt, headcnt; | |
124 | struct bio *bio, **biotail; | |
eea9befa | 125 | int idx; |
1da177e4 LT |
126 | } mm_pages[2]; |
127 | #define DESC_PER_PAGE ((PAGE_SIZE*2)/sizeof(struct mm_dma_desc)) | |
128 | ||
129 | int Active, Ready; | |
130 | ||
131 | struct tasklet_struct tasklet; | |
132 | unsigned int dma_status; | |
133 | ||
134 | struct { | |
135 | int good; | |
136 | int warned; | |
137 | unsigned long last_change; | |
138 | } battery[2]; | |
139 | ||
140 | spinlock_t lock; | |
141 | int check_batteries; | |
142 | ||
143 | int flags; | |
144 | }; | |
145 | ||
146 | static struct cardinfo cards[MM_MAXCARDS]; | |
147 | static struct block_device_operations mm_fops; | |
148 | static struct timer_list battery_timer; | |
149 | ||
150 | static int num_cards = 0; | |
151 | ||
152 | static struct gendisk *mm_gendisk[MM_MAXCARDS]; | |
153 | ||
154 | static void check_batteries(struct cardinfo *card); | |
155 | ||
156 | /* | |
157 | ----------------------------------------------------------------------------------- | |
158 | -- get_userbit | |
159 | ----------------------------------------------------------------------------------- | |
160 | */ | |
161 | static int get_userbit(struct cardinfo *card, int bit) | |
162 | { | |
163 | unsigned char led; | |
164 | ||
165 | led = readb(card->csr_remap + MEMCTRLCMD_LEDCTRL); | |
166 | return led & bit; | |
167 | } | |
168 | /* | |
169 | ----------------------------------------------------------------------------------- | |
170 | -- set_userbit | |
171 | ----------------------------------------------------------------------------------- | |
172 | */ | |
173 | static int set_userbit(struct cardinfo *card, int bit, unsigned char state) | |
174 | { | |
175 | unsigned char led; | |
176 | ||
177 | led = readb(card->csr_remap + MEMCTRLCMD_LEDCTRL); | |
178 | if (state) | |
179 | led |= bit; | |
180 | else | |
181 | led &= ~bit; | |
182 | writeb(led, card->csr_remap + MEMCTRLCMD_LEDCTRL); | |
183 | ||
184 | return 0; | |
185 | } | |
186 | /* | |
187 | ----------------------------------------------------------------------------------- | |
188 | -- set_led | |
189 | ----------------------------------------------------------------------------------- | |
190 | */ | |
191 | /* | |
192 | * NOTE: For the power LED, use the LED_POWER_* macros since they differ | |
193 | */ | |
194 | static void set_led(struct cardinfo *card, int shift, unsigned char state) | |
195 | { | |
196 | unsigned char led; | |
197 | ||
198 | led = readb(card->csr_remap + MEMCTRLCMD_LEDCTRL); | |
199 | if (state == LED_FLIP) | |
200 | led ^= (1<<shift); | |
201 | else { | |
202 | led &= ~(0x03 << shift); | |
203 | led |= (state << shift); | |
204 | } | |
205 | writeb(led, card->csr_remap + MEMCTRLCMD_LEDCTRL); | |
206 | ||
207 | } | |
208 | ||
209 | #ifdef MM_DIAG | |
210 | /* | |
211 | ----------------------------------------------------------------------------------- | |
212 | -- dump_regs | |
213 | ----------------------------------------------------------------------------------- | |
214 | */ | |
215 | static void dump_regs(struct cardinfo *card) | |
216 | { | |
217 | unsigned char *p; | |
218 | int i, i1; | |
219 | ||
220 | p = card->csr_remap; | |
221 | for (i = 0; i < 8; i++) { | |
222 | printk(KERN_DEBUG "%p ", p); | |
223 | ||
224 | for (i1 = 0; i1 < 16; i1++) | |
225 | printk("%02x ", *p++); | |
226 | ||
227 | printk("\n"); | |
228 | } | |
229 | } | |
230 | #endif | |
231 | /* | |
232 | ----------------------------------------------------------------------------------- | |
233 | -- dump_dmastat | |
234 | ----------------------------------------------------------------------------------- | |
235 | */ | |
236 | static void dump_dmastat(struct cardinfo *card, unsigned int dmastat) | |
237 | { | |
4e0af881 | 238 | dev_printk(KERN_DEBUG, &card->dev->dev, "DMAstat - "); |
1da177e4 LT |
239 | if (dmastat & DMASCR_ANY_ERR) |
240 | printk("ANY_ERR "); | |
241 | if (dmastat & DMASCR_MBE_ERR) | |
242 | printk("MBE_ERR "); | |
243 | if (dmastat & DMASCR_PARITY_ERR_REP) | |
244 | printk("PARITY_ERR_REP "); | |
245 | if (dmastat & DMASCR_PARITY_ERR_DET) | |
246 | printk("PARITY_ERR_DET "); | |
247 | if (dmastat & DMASCR_SYSTEM_ERR_SIG) | |
248 | printk("SYSTEM_ERR_SIG "); | |
249 | if (dmastat & DMASCR_TARGET_ABT) | |
250 | printk("TARGET_ABT "); | |
251 | if (dmastat & DMASCR_MASTER_ABT) | |
252 | printk("MASTER_ABT "); | |
253 | if (dmastat & DMASCR_CHAIN_COMPLETE) | |
254 | printk("CHAIN_COMPLETE "); | |
255 | if (dmastat & DMASCR_DMA_COMPLETE) | |
256 | printk("DMA_COMPLETE "); | |
257 | printk("\n"); | |
258 | } | |
259 | ||
260 | /* | |
261 | * Theory of request handling | |
262 | * | |
263 | * Each bio is assigned to one mm_dma_desc - which may not be enough FIXME | |
264 | * We have two pages of mm_dma_desc, holding about 64 descriptors | |
265 | * each. These are allocated at init time. | |
266 | * One page is "Ready" and is either full, or can have request added. | |
267 | * The other page might be "Active", which DMA is happening on it. | |
268 | * | |
269 | * Whenever IO on the active page completes, the Ready page is activated | |
270 | * and the ex-Active page is clean out and made Ready. | |
271 | * Otherwise the Ready page is only activated when it becomes full, or | |
272 | * when mm_unplug_device is called via the unplug_io_fn. | |
273 | * | |
274 | * If a request arrives while both pages a full, it is queued, and b_rdev is | |
275 | * overloaded to record whether it was a read or a write. | |
276 | * | |
277 | * The interrupt handler only polls the device to clear the interrupt. | |
278 | * The processing of the result is done in a tasklet. | |
279 | */ | |
280 | ||
281 | static void mm_start_io(struct cardinfo *card) | |
282 | { | |
283 | /* we have the lock, we know there is | |
284 | * no IO active, and we know that card->Active | |
285 | * is set | |
286 | */ | |
287 | struct mm_dma_desc *desc; | |
288 | struct mm_page *page; | |
289 | int offset; | |
290 | ||
291 | /* make the last descriptor end the chain */ | |
292 | page = &card->mm_pages[card->Active]; | |
46308c0b | 293 | pr_debug("start_io: %d %d->%d\n", card->Active, page->headcnt, page->cnt-1); |
1da177e4 LT |
294 | desc = &page->desc[page->cnt-1]; |
295 | ||
296 | desc->control_bits |= cpu_to_le32(DMASCR_CHAIN_COMP_EN); | |
297 | desc->control_bits &= ~cpu_to_le32(DMASCR_CHAIN_EN); | |
298 | desc->sem_control_bits = desc->control_bits; | |
299 | ||
300 | ||
301 | if (debug & DEBUG_LED_ON_TRANSFER) | |
302 | set_led(card, LED_REMOVE, LED_ON); | |
303 | ||
304 | desc = &page->desc[page->headcnt]; | |
305 | writel(0, card->csr_remap + DMA_PCI_ADDR); | |
306 | writel(0, card->csr_remap + DMA_PCI_ADDR + 4); | |
307 | ||
308 | writel(0, card->csr_remap + DMA_LOCAL_ADDR); | |
309 | writel(0, card->csr_remap + DMA_LOCAL_ADDR + 4); | |
310 | ||
311 | writel(0, card->csr_remap + DMA_TRANSFER_SIZE); | |
312 | writel(0, card->csr_remap + DMA_TRANSFER_SIZE + 4); | |
313 | ||
314 | writel(0, card->csr_remap + DMA_SEMAPHORE_ADDR); | |
315 | writel(0, card->csr_remap + DMA_SEMAPHORE_ADDR + 4); | |
316 | ||
317 | offset = ((char*)desc) - ((char*)page->desc); | |
318 | writel(cpu_to_le32((page->page_dma+offset)&0xffffffff), | |
319 | card->csr_remap + DMA_DESCRIPTOR_ADDR); | |
320 | /* Force the value to u64 before shifting otherwise >> 32 is undefined C | |
321 | * and on some ports will do nothing ! */ | |
322 | writel(cpu_to_le32(((u64)page->page_dma)>>32), | |
323 | card->csr_remap + DMA_DESCRIPTOR_ADDR + 4); | |
324 | ||
325 | /* Go, go, go */ | |
326 | writel(cpu_to_le32(DMASCR_GO | DMASCR_CHAIN_EN | pci_cmds), | |
327 | card->csr_remap + DMA_STATUS_CTRL); | |
328 | } | |
329 | ||
330 | static int add_bio(struct cardinfo *card); | |
331 | ||
332 | static void activate(struct cardinfo *card) | |
333 | { | |
334 | /* if No page is Active, and Ready is | |
335 | * not empty, then switch Ready page | |
336 | * to active and start IO. | |
337 | * Then add any bh's that are available to Ready | |
338 | */ | |
339 | ||
340 | do { | |
341 | while (add_bio(card)) | |
342 | ; | |
343 | ||
344 | if (card->Active == -1 && | |
345 | card->mm_pages[card->Ready].cnt > 0) { | |
346 | card->Active = card->Ready; | |
347 | card->Ready = 1-card->Ready; | |
348 | mm_start_io(card); | |
349 | } | |
350 | ||
351 | } while (card->Active == -1 && add_bio(card)); | |
352 | } | |
353 | ||
354 | static inline void reset_page(struct mm_page *page) | |
355 | { | |
356 | page->cnt = 0; | |
357 | page->headcnt = 0; | |
358 | page->bio = NULL; | |
359 | page->biotail = & page->bio; | |
360 | } | |
361 | ||
165125e1 | 362 | static void mm_unplug_device(struct request_queue *q) |
1da177e4 LT |
363 | { |
364 | struct cardinfo *card = q->queuedata; | |
365 | unsigned long flags; | |
366 | ||
367 | spin_lock_irqsave(&card->lock, flags); | |
368 | if (blk_remove_plug(q)) | |
369 | activate(card); | |
370 | spin_unlock_irqrestore(&card->lock, flags); | |
371 | } | |
372 | ||
373 | /* | |
374 | * If there is room on Ready page, take | |
375 | * one bh off list and add it. | |
376 | * return 1 if there was room, else 0. | |
377 | */ | |
378 | static int add_bio(struct cardinfo *card) | |
379 | { | |
380 | struct mm_page *p; | |
381 | struct mm_dma_desc *desc; | |
382 | dma_addr_t dma_handle; | |
383 | int offset; | |
384 | struct bio *bio; | |
eea9befa N |
385 | struct bio_vec *vec; |
386 | int idx; | |
1da177e4 LT |
387 | int rw; |
388 | int len; | |
389 | ||
390 | bio = card->currentbio; | |
391 | if (!bio && card->bio) { | |
392 | card->currentbio = card->bio; | |
eea9befa N |
393 | card->current_idx = card->bio->bi_idx; |
394 | card->current_sector = card->bio->bi_sector; | |
1da177e4 LT |
395 | card->bio = card->bio->bi_next; |
396 | if (card->bio == NULL) | |
397 | card->biotail = &card->bio; | |
398 | card->currentbio->bi_next = NULL; | |
399 | return 1; | |
400 | } | |
401 | if (!bio) | |
402 | return 0; | |
eea9befa | 403 | idx = card->current_idx; |
1da177e4 LT |
404 | |
405 | rw = bio_rw(bio); | |
406 | if (card->mm_pages[card->Ready].cnt >= DESC_PER_PAGE) | |
407 | return 0; | |
408 | ||
eea9befa N |
409 | vec = bio_iovec_idx(bio, idx); |
410 | len = vec->bv_len; | |
411 | dma_handle = pci_map_page(card->dev, | |
412 | vec->bv_page, | |
413 | vec->bv_offset, | |
1da177e4 LT |
414 | len, |
415 | (rw==READ) ? | |
416 | PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE); | |
417 | ||
418 | p = &card->mm_pages[card->Ready]; | |
419 | desc = &p->desc[p->cnt]; | |
420 | p->cnt++; | |
eea9befa N |
421 | if (p->bio == NULL) |
422 | p->idx = idx; | |
1da177e4 LT |
423 | if ((p->biotail) != &bio->bi_next) { |
424 | *(p->biotail) = bio; | |
425 | p->biotail = &(bio->bi_next); | |
426 | bio->bi_next = NULL; | |
427 | } | |
428 | ||
429 | desc->data_dma_handle = dma_handle; | |
430 | ||
431 | desc->pci_addr = cpu_to_le64((u64)desc->data_dma_handle); | |
eea9befa | 432 | desc->local_addr = cpu_to_le64(card->current_sector << 9); |
1da177e4 LT |
433 | desc->transfer_size = cpu_to_le32(len); |
434 | offset = ( ((char*)&desc->sem_control_bits) - ((char*)p->desc)); | |
435 | desc->sem_addr = cpu_to_le64((u64)(p->page_dma+offset)); | |
436 | desc->zero1 = desc->zero2 = 0; | |
437 | offset = ( ((char*)(desc+1)) - ((char*)p->desc)); | |
438 | desc->next_desc_addr = cpu_to_le64(p->page_dma+offset); | |
439 | desc->control_bits = cpu_to_le32(DMASCR_GO|DMASCR_ERR_INT_EN| | |
440 | DMASCR_PARITY_INT_EN| | |
441 | DMASCR_CHAIN_EN | | |
442 | DMASCR_SEM_EN | | |
443 | pci_cmds); | |
444 | if (rw == WRITE) | |
445 | desc->control_bits |= cpu_to_le32(DMASCR_TRANSFER_READ); | |
446 | desc->sem_control_bits = desc->control_bits; | |
447 | ||
eea9befa N |
448 | card->current_sector += (len >> 9); |
449 | idx++; | |
450 | card->current_idx = idx; | |
451 | if (idx >= bio->bi_vcnt) | |
1da177e4 LT |
452 | card->currentbio = NULL; |
453 | ||
454 | return 1; | |
455 | } | |
456 | ||
457 | static void process_page(unsigned long data) | |
458 | { | |
459 | /* check if any of the requests in the page are DMA_COMPLETE, | |
460 | * and deal with them appropriately. | |
461 | * If we find a descriptor without DMA_COMPLETE in the semaphore, then | |
462 | * dma must have hit an error on that descriptor, so use dma_status instead | |
463 | * and assume that all following descriptors must be re-tried. | |
464 | */ | |
465 | struct mm_page *page; | |
466 | struct bio *return_bio=NULL; | |
467 | struct cardinfo *card = (struct cardinfo *)data; | |
468 | unsigned int dma_status = card->dma_status; | |
469 | ||
470 | spin_lock_bh(&card->lock); | |
471 | if (card->Active < 0) | |
472 | goto out_unlock; | |
473 | page = &card->mm_pages[card->Active]; | |
474 | ||
475 | while (page->headcnt < page->cnt) { | |
476 | struct bio *bio = page->bio; | |
477 | struct mm_dma_desc *desc = &page->desc[page->headcnt]; | |
478 | int control = le32_to_cpu(desc->sem_control_bits); | |
479 | int last=0; | |
480 | int idx; | |
481 | ||
482 | if (!(control & DMASCR_DMA_COMPLETE)) { | |
483 | control = dma_status; | |
484 | last=1; | |
485 | } | |
486 | page->headcnt++; | |
eea9befa N |
487 | idx = page->idx; |
488 | page->idx++; | |
489 | if (page->idx >= bio->bi_vcnt) { | |
1da177e4 | 490 | page->bio = bio->bi_next; |
eea9befa N |
491 | page->idx = page->bio->bi_idx; |
492 | } | |
1da177e4 LT |
493 | |
494 | pci_unmap_page(card->dev, desc->data_dma_handle, | |
495 | bio_iovec_idx(bio,idx)->bv_len, | |
496 | (control& DMASCR_TRANSFER_READ) ? | |
497 | PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); | |
498 | if (control & DMASCR_HARD_ERROR) { | |
499 | /* error */ | |
500 | clear_bit(BIO_UPTODATE, &bio->bi_flags); | |
4e0af881 JG |
501 | dev_printk(KERN_WARNING, &card->dev->dev, |
502 | "I/O error on sector %d/%d\n", | |
503 | le32_to_cpu(desc->local_addr)>>9, | |
504 | le32_to_cpu(desc->transfer_size)); | |
1da177e4 LT |
505 | dump_dmastat(card, control); |
506 | } else if (test_bit(BIO_RW, &bio->bi_rw) && | |
507 | le32_to_cpu(desc->local_addr)>>9 == card->init_size) { | |
508 | card->init_size += le32_to_cpu(desc->transfer_size)>>9; | |
509 | if (card->init_size>>1 >= card->mm_size) { | |
4e0af881 JG |
510 | dev_printk(KERN_INFO, &card->dev->dev, |
511 | "memory now initialised\n"); | |
1da177e4 LT |
512 | set_userbit(card, MEMORY_INITIALIZED, 1); |
513 | } | |
514 | } | |
515 | if (bio != page->bio) { | |
516 | bio->bi_next = return_bio; | |
517 | return_bio = bio; | |
518 | } | |
519 | ||
520 | if (last) break; | |
521 | } | |
522 | ||
523 | if (debug & DEBUG_LED_ON_TRANSFER) | |
524 | set_led(card, LED_REMOVE, LED_OFF); | |
525 | ||
526 | if (card->check_batteries) { | |
527 | card->check_batteries = 0; | |
528 | check_batteries(card); | |
529 | } | |
530 | if (page->headcnt >= page->cnt) { | |
531 | reset_page(page); | |
532 | card->Active = -1; | |
533 | activate(card); | |
534 | } else { | |
535 | /* haven't finished with this one yet */ | |
46308c0b | 536 | pr_debug("do some more\n"); |
1da177e4 LT |
537 | mm_start_io(card); |
538 | } | |
539 | out_unlock: | |
540 | spin_unlock_bh(&card->lock); | |
541 | ||
542 | while(return_bio) { | |
543 | struct bio *bio = return_bio; | |
544 | ||
545 | return_bio = bio->bi_next; | |
546 | bio->bi_next = NULL; | |
6712ecf8 | 547 | bio_endio(bio, 0); |
1da177e4 LT |
548 | } |
549 | } | |
550 | ||
551 | /* | |
552 | ----------------------------------------------------------------------------------- | |
553 | -- mm_make_request | |
554 | ----------------------------------------------------------------------------------- | |
555 | */ | |
165125e1 | 556 | static int mm_make_request(struct request_queue *q, struct bio *bio) |
1da177e4 LT |
557 | { |
558 | struct cardinfo *card = q->queuedata; | |
f2b9ecc4 ZB |
559 | pr_debug("mm_make_request %llu %u\n", |
560 | (unsigned long long)bio->bi_sector, bio->bi_size); | |
1da177e4 | 561 | |
1da177e4 LT |
562 | spin_lock_irq(&card->lock); |
563 | *card->biotail = bio; | |
564 | bio->bi_next = NULL; | |
565 | card->biotail = &bio->bi_next; | |
566 | blk_plug_device(q); | |
567 | spin_unlock_irq(&card->lock); | |
568 | ||
569 | return 0; | |
570 | } | |
571 | ||
572 | /* | |
573 | ----------------------------------------------------------------------------------- | |
574 | -- mm_interrupt | |
575 | ----------------------------------------------------------------------------------- | |
576 | */ | |
7d12e780 | 577 | static irqreturn_t mm_interrupt(int irq, void *__card) |
1da177e4 LT |
578 | { |
579 | struct cardinfo *card = (struct cardinfo *) __card; | |
580 | unsigned int dma_status; | |
581 | unsigned short cfg_status; | |
582 | ||
583 | HW_TRACE(0x30); | |
584 | ||
585 | dma_status = le32_to_cpu(readl(card->csr_remap + DMA_STATUS_CTRL)); | |
586 | ||
587 | if (!(dma_status & (DMASCR_ERROR_MASK | DMASCR_CHAIN_COMPLETE))) { | |
588 | /* interrupt wasn't for me ... */ | |
589 | return IRQ_NONE; | |
590 | } | |
591 | ||
592 | /* clear COMPLETION interrupts */ | |
593 | if (card->flags & UM_FLAG_NO_BYTE_STATUS) | |
594 | writel(cpu_to_le32(DMASCR_DMA_COMPLETE|DMASCR_CHAIN_COMPLETE), | |
595 | card->csr_remap+ DMA_STATUS_CTRL); | |
596 | else | |
597 | writeb((DMASCR_DMA_COMPLETE|DMASCR_CHAIN_COMPLETE) >> 16, | |
598 | card->csr_remap+ DMA_STATUS_CTRL + 2); | |
599 | ||
600 | /* log errors and clear interrupt status */ | |
601 | if (dma_status & DMASCR_ANY_ERR) { | |
602 | unsigned int data_log1, data_log2; | |
603 | unsigned int addr_log1, addr_log2; | |
604 | unsigned char stat, count, syndrome, check; | |
605 | ||
606 | stat = readb(card->csr_remap + MEMCTRLCMD_ERRSTATUS); | |
607 | ||
608 | data_log1 = le32_to_cpu(readl(card->csr_remap + ERROR_DATA_LOG)); | |
609 | data_log2 = le32_to_cpu(readl(card->csr_remap + ERROR_DATA_LOG + 4)); | |
610 | addr_log1 = le32_to_cpu(readl(card->csr_remap + ERROR_ADDR_LOG)); | |
611 | addr_log2 = readb(card->csr_remap + ERROR_ADDR_LOG + 4); | |
612 | ||
613 | count = readb(card->csr_remap + ERROR_COUNT); | |
614 | syndrome = readb(card->csr_remap + ERROR_SYNDROME); | |
615 | check = readb(card->csr_remap + ERROR_CHECK); | |
616 | ||
617 | dump_dmastat(card, dma_status); | |
618 | ||
619 | if (stat & 0x01) | |
4e0af881 JG |
620 | dev_printk(KERN_ERR, &card->dev->dev, |
621 | "Memory access error detected (err count %d)\n", | |
622 | count); | |
1da177e4 | 623 | if (stat & 0x02) |
4e0af881 JG |
624 | dev_printk(KERN_ERR, &card->dev->dev, |
625 | "Multi-bit EDC error\n"); | |
1da177e4 | 626 | |
4e0af881 JG |
627 | dev_printk(KERN_ERR, &card->dev->dev, |
628 | "Fault Address 0x%02x%08x, Fault Data 0x%08x%08x\n", | |
629 | addr_log2, addr_log1, data_log2, data_log1); | |
630 | dev_printk(KERN_ERR, &card->dev->dev, | |
631 | "Fault Check 0x%02x, Fault Syndrome 0x%02x\n", | |
632 | check, syndrome); | |
1da177e4 LT |
633 | |
634 | writeb(0, card->csr_remap + ERROR_COUNT); | |
635 | } | |
636 | ||
637 | if (dma_status & DMASCR_PARITY_ERR_REP) { | |
4e0af881 JG |
638 | dev_printk(KERN_ERR, &card->dev->dev, |
639 | "PARITY ERROR REPORTED\n"); | |
1da177e4 LT |
640 | pci_read_config_word(card->dev, PCI_STATUS, &cfg_status); |
641 | pci_write_config_word(card->dev, PCI_STATUS, cfg_status); | |
642 | } | |
643 | ||
644 | if (dma_status & DMASCR_PARITY_ERR_DET) { | |
4e0af881 JG |
645 | dev_printk(KERN_ERR, &card->dev->dev, |
646 | "PARITY ERROR DETECTED\n"); | |
1da177e4 LT |
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_SYSTEM_ERR_SIG) { | |
4e0af881 | 652 | dev_printk(KERN_ERR, &card->dev->dev, "SYSTEM ERROR\n"); |
1da177e4 LT |
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_TARGET_ABT) { | |
4e0af881 | 658 | dev_printk(KERN_ERR, &card->dev->dev, "TARGET ABORT\n"); |
1da177e4 LT |
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 | if (dma_status & DMASCR_MASTER_ABT) { | |
4e0af881 | 664 | dev_printk(KERN_ERR, &card->dev->dev, "MASTER ABORT\n"); |
1da177e4 LT |
665 | pci_read_config_word(card->dev, PCI_STATUS, &cfg_status); |
666 | pci_write_config_word(card->dev, PCI_STATUS, cfg_status); | |
667 | } | |
668 | ||
669 | /* and process the DMA descriptors */ | |
670 | card->dma_status = dma_status; | |
671 | tasklet_schedule(&card->tasklet); | |
672 | ||
673 | HW_TRACE(0x36); | |
674 | ||
675 | return IRQ_HANDLED; | |
676 | } | |
677 | /* | |
678 | ----------------------------------------------------------------------------------- | |
679 | -- set_fault_to_battery_status | |
680 | ----------------------------------------------------------------------------------- | |
681 | */ | |
682 | /* | |
683 | * If both batteries are good, no LED | |
684 | * If either battery has been warned, solid LED | |
685 | * If both batteries are bad, flash the LED quickly | |
686 | * If either battery is bad, flash the LED semi quickly | |
687 | */ | |
688 | static void set_fault_to_battery_status(struct cardinfo *card) | |
689 | { | |
690 | if (card->battery[0].good && card->battery[1].good) | |
691 | set_led(card, LED_FAULT, LED_OFF); | |
692 | else if (card->battery[0].warned || card->battery[1].warned) | |
693 | set_led(card, LED_FAULT, LED_ON); | |
694 | else if (!card->battery[0].good && !card->battery[1].good) | |
695 | set_led(card, LED_FAULT, LED_FLASH_7_0); | |
696 | else | |
697 | set_led(card, LED_FAULT, LED_FLASH_3_5); | |
698 | } | |
699 | ||
700 | static void init_battery_timer(void); | |
701 | ||
702 | ||
703 | /* | |
704 | ----------------------------------------------------------------------------------- | |
705 | -- check_battery | |
706 | ----------------------------------------------------------------------------------- | |
707 | */ | |
708 | static int check_battery(struct cardinfo *card, int battery, int status) | |
709 | { | |
710 | if (status != card->battery[battery].good) { | |
711 | card->battery[battery].good = !card->battery[battery].good; | |
712 | card->battery[battery].last_change = jiffies; | |
713 | ||
714 | if (card->battery[battery].good) { | |
4e0af881 JG |
715 | dev_printk(KERN_ERR, &card->dev->dev, |
716 | "Battery %d now good\n", battery + 1); | |
1da177e4 LT |
717 | card->battery[battery].warned = 0; |
718 | } else | |
4e0af881 JG |
719 | dev_printk(KERN_ERR, &card->dev->dev, |
720 | "Battery %d now FAILED\n", battery + 1); | |
1da177e4 LT |
721 | |
722 | return 1; | |
723 | } else if (!card->battery[battery].good && | |
724 | !card->battery[battery].warned && | |
725 | time_after_eq(jiffies, card->battery[battery].last_change + | |
726 | (HZ * 60 * 60 * 5))) { | |
4e0af881 JG |
727 | dev_printk(KERN_ERR, &card->dev->dev, |
728 | "Battery %d still FAILED after 5 hours\n", battery + 1); | |
1da177e4 LT |
729 | card->battery[battery].warned = 1; |
730 | ||
731 | return 1; | |
732 | } | |
733 | ||
734 | return 0; | |
735 | } | |
736 | /* | |
737 | ----------------------------------------------------------------------------------- | |
738 | -- check_batteries | |
739 | ----------------------------------------------------------------------------------- | |
740 | */ | |
741 | static void check_batteries(struct cardinfo *card) | |
742 | { | |
743 | /* NOTE: this must *never* be called while the card | |
744 | * is doing (bus-to-card) DMA, or you will need the | |
745 | * reset switch | |
746 | */ | |
747 | unsigned char status; | |
748 | int ret1, ret2; | |
749 | ||
750 | status = readb(card->csr_remap + MEMCTRLSTATUS_BATTERY); | |
751 | if (debug & DEBUG_BATTERY_POLLING) | |
4e0af881 JG |
752 | dev_printk(KERN_DEBUG, &card->dev->dev, |
753 | "checking battery status, 1 = %s, 2 = %s\n", | |
1da177e4 LT |
754 | (status & BATTERY_1_FAILURE) ? "FAILURE" : "OK", |
755 | (status & BATTERY_2_FAILURE) ? "FAILURE" : "OK"); | |
756 | ||
757 | ret1 = check_battery(card, 0, !(status & BATTERY_1_FAILURE)); | |
758 | ret2 = check_battery(card, 1, !(status & BATTERY_2_FAILURE)); | |
759 | ||
760 | if (ret1 || ret2) | |
761 | set_fault_to_battery_status(card); | |
762 | } | |
763 | ||
764 | static void check_all_batteries(unsigned long ptr) | |
765 | { | |
766 | int i; | |
767 | ||
768 | for (i = 0; i < num_cards; i++) | |
769 | if (!(cards[i].flags & UM_FLAG_NO_BATT)) { | |
770 | struct cardinfo *card = &cards[i]; | |
771 | spin_lock_bh(&card->lock); | |
772 | if (card->Active >= 0) | |
773 | card->check_batteries = 1; | |
774 | else | |
775 | check_batteries(card); | |
776 | spin_unlock_bh(&card->lock); | |
777 | } | |
778 | ||
779 | init_battery_timer(); | |
780 | } | |
781 | /* | |
782 | ----------------------------------------------------------------------------------- | |
783 | -- init_battery_timer | |
784 | ----------------------------------------------------------------------------------- | |
785 | */ | |
786 | static void init_battery_timer(void) | |
787 | { | |
788 | init_timer(&battery_timer); | |
789 | battery_timer.function = check_all_batteries; | |
790 | battery_timer.expires = jiffies + (HZ * 60); | |
791 | add_timer(&battery_timer); | |
792 | } | |
793 | /* | |
794 | ----------------------------------------------------------------------------------- | |
795 | -- del_battery_timer | |
796 | ----------------------------------------------------------------------------------- | |
797 | */ | |
798 | static void del_battery_timer(void) | |
799 | { | |
800 | del_timer(&battery_timer); | |
801 | } | |
802 | /* | |
803 | ----------------------------------------------------------------------------------- | |
804 | -- mm_revalidate | |
805 | ----------------------------------------------------------------------------------- | |
806 | */ | |
807 | /* | |
808 | * Note no locks taken out here. In a worst case scenario, we could drop | |
809 | * a chunk of system memory. But that should never happen, since validation | |
810 | * happens at open or mount time, when locks are held. | |
811 | * | |
812 | * That's crap, since doing that while some partitions are opened | |
813 | * or mounted will give you really nasty results. | |
814 | */ | |
815 | static int mm_revalidate(struct gendisk *disk) | |
816 | { | |
817 | struct cardinfo *card = disk->private_data; | |
818 | set_capacity(disk, card->mm_size << 1); | |
819 | return 0; | |
820 | } | |
a885c8c4 CH |
821 | |
822 | static int mm_getgeo(struct block_device *bdev, struct hd_geometry *geo) | |
1da177e4 | 823 | { |
a885c8c4 CH |
824 | struct cardinfo *card = bdev->bd_disk->private_data; |
825 | int size = card->mm_size * (1024 / MM_HARDSECT); | |
1da177e4 | 826 | |
a885c8c4 CH |
827 | /* |
828 | * get geometry: we have to fake one... trim the size to a | |
829 | * multiple of 2048 (1M): tell we have 32 sectors, 64 heads, | |
830 | * whatever cylinders. | |
831 | */ | |
832 | geo->heads = 64; | |
833 | geo->sectors = 32; | |
834 | geo->cylinders = size / (geo->heads * geo->sectors); | |
835 | return 0; | |
1da177e4 | 836 | } |
a885c8c4 | 837 | |
1da177e4 LT |
838 | /* |
839 | ----------------------------------------------------------------------------------- | |
840 | -- mm_check_change | |
841 | ----------------------------------------------------------------------------------- | |
842 | Future support for removable devices | |
843 | */ | |
844 | static int mm_check_change(struct gendisk *disk) | |
845 | { | |
846 | /* struct cardinfo *dev = disk->private_data; */ | |
847 | return 0; | |
848 | } | |
849 | /* | |
850 | ----------------------------------------------------------------------------------- | |
851 | -- mm_fops | |
852 | ----------------------------------------------------------------------------------- | |
853 | */ | |
854 | static struct block_device_operations mm_fops = { | |
855 | .owner = THIS_MODULE, | |
a885c8c4 | 856 | .getgeo = mm_getgeo, |
1da177e4 LT |
857 | .revalidate_disk= mm_revalidate, |
858 | .media_changed = mm_check_change, | |
859 | }; | |
860 | /* | |
861 | ----------------------------------------------------------------------------------- | |
862 | -- mm_pci_probe | |
863 | ----------------------------------------------------------------------------------- | |
864 | */ | |
865 | static int __devinit mm_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) | |
866 | { | |
867 | int ret = -ENODEV; | |
868 | struct cardinfo *card = &cards[num_cards]; | |
869 | unsigned char mem_present; | |
870 | unsigned char batt_status; | |
871 | unsigned int saved_bar, data; | |
872 | int magic_number; | |
4e0af881 JG |
873 | static int printed_version; |
874 | ||
875 | if (!printed_version++) | |
876 | printk(KERN_INFO DRIVER_VERSION " : " DRIVER_DESC "\n"); | |
1da177e4 LT |
877 | |
878 | if (pci_enable_device(dev) < 0) | |
879 | return -ENODEV; | |
880 | ||
881 | pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0xF8); | |
882 | pci_set_master(dev); | |
883 | ||
884 | card->dev = dev; | |
1da177e4 LT |
885 | |
886 | card->csr_base = pci_resource_start(dev, 0); | |
887 | card->csr_len = pci_resource_len(dev, 0); | |
1da177e4 | 888 | |
4e0af881 JG |
889 | dev_printk(KERN_INFO, &dev->dev, |
890 | "Micro Memory(tm) controller found (PCI Mem Module (Battery Backup))\n"); | |
1da177e4 | 891 | |
910638ae MG |
892 | if (pci_set_dma_mask(dev, DMA_64BIT_MASK) && |
893 | pci_set_dma_mask(dev, DMA_32BIT_MASK)) { | |
4e0af881 | 894 | dev_printk(KERN_WARNING, &dev->dev, "NO suitable DMA found\n"); |
1da177e4 LT |
895 | return -ENOMEM; |
896 | } | |
897 | if (!request_mem_region(card->csr_base, card->csr_len, "Micro Memory")) { | |
4e0af881 JG |
898 | dev_printk(KERN_ERR, &card->dev->dev, |
899 | "Unable to request memory region\n"); | |
1da177e4 LT |
900 | ret = -ENOMEM; |
901 | ||
902 | goto failed_req_csr; | |
903 | } | |
904 | ||
905 | card->csr_remap = ioremap_nocache(card->csr_base, card->csr_len); | |
906 | if (!card->csr_remap) { | |
4e0af881 JG |
907 | dev_printk(KERN_ERR, &card->dev->dev, |
908 | "Unable to remap memory region\n"); | |
1da177e4 LT |
909 | ret = -ENOMEM; |
910 | ||
911 | goto failed_remap_csr; | |
912 | } | |
913 | ||
4e0af881 JG |
914 | dev_printk(KERN_INFO, &card->dev->dev, |
915 | "CSR 0x%08lx -> 0x%p (0x%lx)\n", | |
1da177e4 LT |
916 | card->csr_base, card->csr_remap, card->csr_len); |
917 | ||
1da177e4 LT |
918 | switch(card->dev->device) { |
919 | case 0x5415: | |
920 | card->flags |= UM_FLAG_NO_BYTE_STATUS | UM_FLAG_NO_BATTREG; | |
921 | magic_number = 0x59; | |
922 | break; | |
923 | ||
924 | case 0x5425: | |
925 | card->flags |= UM_FLAG_NO_BYTE_STATUS; | |
926 | magic_number = 0x5C; | |
927 | break; | |
928 | ||
929 | case 0x6155: | |
930 | card->flags |= UM_FLAG_NO_BYTE_STATUS | UM_FLAG_NO_BATTREG | UM_FLAG_NO_BATT; | |
931 | magic_number = 0x99; | |
932 | break; | |
933 | ||
934 | default: | |
935 | magic_number = 0x100; | |
936 | break; | |
937 | } | |
938 | ||
939 | if (readb(card->csr_remap + MEMCTRLSTATUS_MAGIC) != magic_number) { | |
4e0af881 | 940 | dev_printk(KERN_ERR, &card->dev->dev, "Magic number invalid\n"); |
1da177e4 LT |
941 | ret = -ENOMEM; |
942 | goto failed_magic; | |
943 | } | |
944 | ||
945 | card->mm_pages[0].desc = pci_alloc_consistent(card->dev, | |
946 | PAGE_SIZE*2, | |
947 | &card->mm_pages[0].page_dma); | |
948 | card->mm_pages[1].desc = pci_alloc_consistent(card->dev, | |
949 | PAGE_SIZE*2, | |
950 | &card->mm_pages[1].page_dma); | |
951 | if (card->mm_pages[0].desc == NULL || | |
952 | card->mm_pages[1].desc == NULL) { | |
4e0af881 | 953 | dev_printk(KERN_ERR, &card->dev->dev, "alloc failed\n"); |
1da177e4 LT |
954 | goto failed_alloc; |
955 | } | |
956 | reset_page(&card->mm_pages[0]); | |
957 | reset_page(&card->mm_pages[1]); | |
958 | card->Ready = 0; /* page 0 is ready */ | |
959 | card->Active = -1; /* no page is active */ | |
960 | card->bio = NULL; | |
961 | card->biotail = &card->bio; | |
962 | ||
963 | card->queue = blk_alloc_queue(GFP_KERNEL); | |
964 | if (!card->queue) | |
965 | goto failed_alloc; | |
966 | ||
967 | blk_queue_make_request(card->queue, mm_make_request); | |
968 | card->queue->queuedata = card; | |
969 | card->queue->unplug_fn = mm_unplug_device; | |
970 | ||
971 | tasklet_init(&card->tasklet, process_page, (unsigned long)card); | |
972 | ||
973 | card->check_batteries = 0; | |
974 | ||
975 | mem_present = readb(card->csr_remap + MEMCTRLSTATUS_MEMORY); | |
976 | switch (mem_present) { | |
977 | case MEM_128_MB: | |
978 | card->mm_size = 1024 * 128; | |
979 | break; | |
980 | case MEM_256_MB: | |
981 | card->mm_size = 1024 * 256; | |
982 | break; | |
983 | case MEM_512_MB: | |
984 | card->mm_size = 1024 * 512; | |
985 | break; | |
986 | case MEM_1_GB: | |
987 | card->mm_size = 1024 * 1024; | |
988 | break; | |
989 | case MEM_2_GB: | |
990 | card->mm_size = 1024 * 2048; | |
991 | break; | |
992 | default: | |
993 | card->mm_size = 0; | |
994 | break; | |
995 | } | |
996 | ||
997 | /* Clear the LED's we control */ | |
998 | set_led(card, LED_REMOVE, LED_OFF); | |
999 | set_led(card, LED_FAULT, LED_OFF); | |
1000 | ||
1001 | batt_status = readb(card->csr_remap + MEMCTRLSTATUS_BATTERY); | |
1002 | ||
1003 | card->battery[0].good = !(batt_status & BATTERY_1_FAILURE); | |
1004 | card->battery[1].good = !(batt_status & BATTERY_2_FAILURE); | |
1005 | card->battery[0].last_change = card->battery[1].last_change = jiffies; | |
1006 | ||
1007 | if (card->flags & UM_FLAG_NO_BATT) | |
4e0af881 JG |
1008 | dev_printk(KERN_INFO, &card->dev->dev, |
1009 | "Size %d KB\n", card->mm_size); | |
1da177e4 | 1010 | else { |
4e0af881 JG |
1011 | dev_printk(KERN_INFO, &card->dev->dev, |
1012 | "Size %d KB, Battery 1 %s (%s), Battery 2 %s (%s)\n", | |
1013 | card->mm_size, | |
1da177e4 LT |
1014 | (batt_status & BATTERY_1_DISABLED ? "Disabled" : "Enabled"), |
1015 | card->battery[0].good ? "OK" : "FAILURE", | |
1016 | (batt_status & BATTERY_2_DISABLED ? "Disabled" : "Enabled"), | |
1017 | card->battery[1].good ? "OK" : "FAILURE"); | |
1018 | ||
1019 | set_fault_to_battery_status(card); | |
1020 | } | |
1021 | ||
1022 | pci_read_config_dword(dev, PCI_BASE_ADDRESS_1, &saved_bar); | |
1023 | data = 0xffffffff; | |
1024 | pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, data); | |
1025 | pci_read_config_dword(dev, PCI_BASE_ADDRESS_1, &data); | |
1026 | pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, saved_bar); | |
1027 | data &= 0xfffffff0; | |
1028 | data = ~data; | |
1029 | data += 1; | |
1030 | ||
1031 | card->win_size = data; | |
1032 | ||
1033 | ||
69ab3912 | 1034 | if (request_irq(dev->irq, mm_interrupt, IRQF_SHARED, "pci-umem", card)) { |
4e0af881 JG |
1035 | dev_printk(KERN_ERR, &card->dev->dev, |
1036 | "Unable to allocate IRQ\n"); | |
1da177e4 LT |
1037 | ret = -ENODEV; |
1038 | ||
1039 | goto failed_req_irq; | |
1040 | } | |
1041 | ||
1042 | card->irq = dev->irq; | |
4e0af881 JG |
1043 | dev_printk(KERN_INFO, &card->dev->dev, |
1044 | "Window size %d bytes, IRQ %d\n", | |
1da177e4 LT |
1045 | card->win_size, card->irq); |
1046 | ||
1047 | spin_lock_init(&card->lock); | |
1048 | ||
1049 | pci_set_drvdata(dev, card); | |
1050 | ||
1051 | if (pci_write_cmd != 0x0F) /* If not Memory Write & Invalidate */ | |
1052 | pci_write_cmd = 0x07; /* then Memory Write command */ | |
1053 | ||
1054 | if (pci_write_cmd & 0x08) { /* use Memory Write and Invalidate */ | |
1055 | unsigned short cfg_command; | |
1056 | pci_read_config_word(dev, PCI_COMMAND, &cfg_command); | |
1057 | cfg_command |= 0x10; /* Memory Write & Invalidate Enable */ | |
1058 | pci_write_config_word(dev, PCI_COMMAND, cfg_command); | |
1059 | } | |
1060 | pci_cmds = (pci_read_cmd << 28) | (pci_write_cmd << 24); | |
1061 | ||
1062 | num_cards++; | |
1063 | ||
1064 | if (!get_userbit(card, MEMORY_INITIALIZED)) { | |
4e0af881 JG |
1065 | dev_printk(KERN_INFO, &card->dev->dev, |
1066 | "memory NOT initialized. Consider over-writing whole device.\n"); | |
1da177e4 LT |
1067 | card->init_size = 0; |
1068 | } else { | |
4e0af881 JG |
1069 | dev_printk(KERN_INFO, &card->dev->dev, |
1070 | "memory already initialized\n"); | |
1da177e4 LT |
1071 | card->init_size = card->mm_size; |
1072 | } | |
1073 | ||
1074 | /* Enable ECC */ | |
1075 | writeb(EDC_STORE_CORRECT, card->csr_remap + MEMCTRLCMD_ERRCTRL); | |
1076 | ||
1077 | return 0; | |
1078 | ||
1079 | failed_req_irq: | |
1080 | failed_alloc: | |
1081 | if (card->mm_pages[0].desc) | |
1082 | pci_free_consistent(card->dev, PAGE_SIZE*2, | |
1083 | card->mm_pages[0].desc, | |
1084 | card->mm_pages[0].page_dma); | |
1085 | if (card->mm_pages[1].desc) | |
1086 | pci_free_consistent(card->dev, PAGE_SIZE*2, | |
1087 | card->mm_pages[1].desc, | |
1088 | card->mm_pages[1].page_dma); | |
1089 | failed_magic: | |
1da177e4 LT |
1090 | iounmap(card->csr_remap); |
1091 | failed_remap_csr: | |
1092 | release_mem_region(card->csr_base, card->csr_len); | |
1093 | failed_req_csr: | |
1094 | ||
1095 | return ret; | |
1096 | } | |
1097 | /* | |
1098 | ----------------------------------------------------------------------------------- | |
1099 | -- mm_pci_remove | |
1100 | ----------------------------------------------------------------------------------- | |
1101 | */ | |
1102 | static void mm_pci_remove(struct pci_dev *dev) | |
1103 | { | |
1104 | struct cardinfo *card = pci_get_drvdata(dev); | |
1105 | ||
1106 | tasklet_kill(&card->tasklet); | |
1107 | iounmap(card->csr_remap); | |
1108 | release_mem_region(card->csr_base, card->csr_len); | |
1da177e4 LT |
1109 | free_irq(card->irq, card); |
1110 | ||
1111 | if (card->mm_pages[0].desc) | |
1112 | pci_free_consistent(card->dev, PAGE_SIZE*2, | |
1113 | card->mm_pages[0].desc, | |
1114 | card->mm_pages[0].page_dma); | |
1115 | if (card->mm_pages[1].desc) | |
1116 | pci_free_consistent(card->dev, PAGE_SIZE*2, | |
1117 | card->mm_pages[1].desc, | |
1118 | card->mm_pages[1].page_dma); | |
1312f40e | 1119 | blk_cleanup_queue(card->queue); |
1da177e4 LT |
1120 | } |
1121 | ||
5874c18b NB |
1122 | static const struct pci_device_id mm_pci_ids[] = { |
1123 | {PCI_DEVICE(PCI_VENDOR_ID_MICRO_MEMORY,PCI_DEVICE_ID_MICRO_MEMORY_5415CN)}, | |
1124 | {PCI_DEVICE(PCI_VENDOR_ID_MICRO_MEMORY,PCI_DEVICE_ID_MICRO_MEMORY_5425CN)}, | |
1125 | {PCI_DEVICE(PCI_VENDOR_ID_MICRO_MEMORY,PCI_DEVICE_ID_MICRO_MEMORY_6155)}, | |
1126 | { | |
1da177e4 LT |
1127 | .vendor = 0x8086, |
1128 | .device = 0xB555, | |
1129 | .subvendor= 0x1332, | |
1130 | .subdevice= 0x5460, | |
1131 | .class = 0x050000, | |
1132 | .class_mask= 0, | |
5874c18b | 1133 | }, { /* end: all zeroes */ } |
1da177e4 LT |
1134 | }; |
1135 | ||
1136 | MODULE_DEVICE_TABLE(pci, mm_pci_ids); | |
1137 | ||
1138 | static struct pci_driver mm_pci_driver = { | |
1139 | .name = "umem", | |
1140 | .id_table = mm_pci_ids, | |
1141 | .probe = mm_pci_probe, | |
1142 | .remove = mm_pci_remove, | |
1143 | }; | |
1144 | /* | |
1145 | ----------------------------------------------------------------------------------- | |
1146 | -- mm_init | |
1147 | ----------------------------------------------------------------------------------- | |
1148 | */ | |
1149 | ||
1150 | static int __init mm_init(void) | |
1151 | { | |
1152 | int retval, i; | |
1153 | int err; | |
1154 | ||
9bfab8ce | 1155 | retval = pci_register_driver(&mm_pci_driver); |
1da177e4 LT |
1156 | if (retval) |
1157 | return -ENOMEM; | |
1158 | ||
1159 | err = major_nr = register_blkdev(0, "umem"); | |
5a243e0e N |
1160 | if (err < 0) { |
1161 | pci_unregister_driver(&mm_pci_driver); | |
1da177e4 | 1162 | return -EIO; |
5a243e0e | 1163 | } |
1da177e4 LT |
1164 | |
1165 | for (i = 0; i < num_cards; i++) { | |
1166 | mm_gendisk[i] = alloc_disk(1 << MM_SHIFT); | |
1167 | if (!mm_gendisk[i]) | |
1168 | goto out; | |
1169 | } | |
1170 | ||
1171 | for (i = 0; i < num_cards; i++) { | |
1172 | struct gendisk *disk = mm_gendisk[i]; | |
1173 | sprintf(disk->disk_name, "umem%c", 'a'+i); | |
1da177e4 LT |
1174 | spin_lock_init(&cards[i].lock); |
1175 | disk->major = major_nr; | |
1176 | disk->first_minor = i << MM_SHIFT; | |
1177 | disk->fops = &mm_fops; | |
1178 | disk->private_data = &cards[i]; | |
1179 | disk->queue = cards[i].queue; | |
1180 | set_capacity(disk, cards[i].mm_size << 1); | |
1181 | add_disk(disk); | |
1182 | } | |
1183 | ||
1184 | init_battery_timer(); | |
4e0af881 | 1185 | printk(KERN_INFO "MM: desc_per_page = %ld\n", DESC_PER_PAGE); |
1da177e4 LT |
1186 | /* printk("mm_init: Done. 10-19-01 9:00\n"); */ |
1187 | return 0; | |
1188 | ||
1189 | out: | |
5a243e0e | 1190 | pci_unregister_driver(&mm_pci_driver); |
1da177e4 LT |
1191 | unregister_blkdev(major_nr, "umem"); |
1192 | while (i--) | |
1193 | put_disk(mm_gendisk[i]); | |
1194 | return -ENOMEM; | |
1195 | } | |
1196 | /* | |
1197 | ----------------------------------------------------------------------------------- | |
1198 | -- mm_cleanup | |
1199 | ----------------------------------------------------------------------------------- | |
1200 | */ | |
1201 | static void __exit mm_cleanup(void) | |
1202 | { | |
1203 | int i; | |
1204 | ||
1205 | del_battery_timer(); | |
1206 | ||
1207 | for (i=0; i < num_cards ; i++) { | |
1208 | del_gendisk(mm_gendisk[i]); | |
1209 | put_disk(mm_gendisk[i]); | |
1210 | } | |
1211 | ||
1212 | pci_unregister_driver(&mm_pci_driver); | |
1213 | ||
1214 | unregister_blkdev(major_nr, "umem"); | |
1215 | } | |
1216 | ||
1217 | module_init(mm_init); | |
1218 | module_exit(mm_cleanup); | |
1219 | ||
1220 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
1221 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1222 | MODULE_LICENSE("GPL"); |