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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 | ||
458cf5e9 | 37 | #undef DEBUG /* #define DEBUG 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> | |
5a0e3ad6 | 43 | #include <linux/gfp.h> |
1da177e4 LT |
44 | #include <linux/ioctl.h> |
45 | #include <linux/module.h> | |
46 | #include <linux/init.h> | |
47 | #include <linux/interrupt.h> | |
1da177e4 LT |
48 | #include <linux/timer.h> |
49 | #include <linux/pci.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 | ||
ee4a7b68 JG |
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" | |
1da177e4 LT |
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 { | |
1da177e4 LT |
101 | struct pci_dev *dev; |
102 | ||
1da177e4 | 103 | unsigned char __iomem *csr_remap; |
1da177e4 LT |
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; | |
eea9befa N |
111 | int current_idx; |
112 | sector_t current_sector; | |
1da177e4 | 113 | |
165125e1 | 114 | struct request_queue *queue; |
1da177e4 LT |
115 | |
116 | struct mm_page { | |
117 | dma_addr_t page_dma; | |
118 | struct mm_dma_desc *desc; | |
119 | int cnt, headcnt; | |
120 | struct bio *bio, **biotail; | |
eea9befa | 121 | int idx; |
1da177e4 LT |
122 | } mm_pages[2]; |
123 | #define DESC_PER_PAGE ((PAGE_SIZE*2)/sizeof(struct mm_dma_desc)) | |
124 | ||
125 | int Active, Ready; | |
126 | ||
127 | struct tasklet_struct tasklet; | |
128 | unsigned int dma_status; | |
129 | ||
130 | struct { | |
131 | int good; | |
132 | int warned; | |
133 | unsigned long last_change; | |
134 | } battery[2]; | |
135 | ||
136 | spinlock_t lock; | |
137 | int check_batteries; | |
138 | ||
139 | int flags; | |
140 | }; | |
141 | ||
142 | static struct cardinfo cards[MM_MAXCARDS]; | |
1da177e4 LT |
143 | static struct timer_list battery_timer; |
144 | ||
458cf5e9 | 145 | static int num_cards; |
1da177e4 LT |
146 | |
147 | static struct gendisk *mm_gendisk[MM_MAXCARDS]; | |
148 | ||
149 | static void check_batteries(struct cardinfo *card); | |
150 | ||
1da177e4 LT |
151 | static int get_userbit(struct cardinfo *card, int bit) |
152 | { | |
153 | unsigned char led; | |
154 | ||
155 | led = readb(card->csr_remap + MEMCTRLCMD_LEDCTRL); | |
156 | return led & bit; | |
157 | } | |
458cf5e9 | 158 | |
1da177e4 LT |
159 | static int set_userbit(struct cardinfo *card, int bit, unsigned char state) |
160 | { | |
161 | unsigned char led; | |
162 | ||
163 | led = readb(card->csr_remap + MEMCTRLCMD_LEDCTRL); | |
164 | if (state) | |
165 | led |= bit; | |
166 | else | |
167 | led &= ~bit; | |
168 | writeb(led, card->csr_remap + MEMCTRLCMD_LEDCTRL); | |
169 | ||
170 | return 0; | |
171 | } | |
458cf5e9 | 172 | |
1da177e4 LT |
173 | /* |
174 | * NOTE: For the power LED, use the LED_POWER_* macros since they differ | |
175 | */ | |
176 | static void set_led(struct cardinfo *card, int shift, unsigned char state) | |
177 | { | |
178 | unsigned char led; | |
179 | ||
180 | led = readb(card->csr_remap + MEMCTRLCMD_LEDCTRL); | |
181 | if (state == LED_FLIP) | |
182 | led ^= (1<<shift); | |
183 | else { | |
184 | led &= ~(0x03 << shift); | |
185 | led |= (state << shift); | |
186 | } | |
187 | writeb(led, card->csr_remap + MEMCTRLCMD_LEDCTRL); | |
188 | ||
189 | } | |
190 | ||
191 | #ifdef MM_DIAG | |
1da177e4 LT |
192 | static void dump_regs(struct cardinfo *card) |
193 | { | |
194 | unsigned char *p; | |
195 | int i, i1; | |
196 | ||
197 | p = card->csr_remap; | |
198 | for (i = 0; i < 8; i++) { | |
199 | printk(KERN_DEBUG "%p ", p); | |
200 | ||
201 | for (i1 = 0; i1 < 16; i1++) | |
202 | printk("%02x ", *p++); | |
203 | ||
204 | printk("\n"); | |
205 | } | |
206 | } | |
207 | #endif | |
458cf5e9 | 208 | |
1da177e4 LT |
209 | static void dump_dmastat(struct cardinfo *card, unsigned int dmastat) |
210 | { | |
4e0af881 | 211 | dev_printk(KERN_DEBUG, &card->dev->dev, "DMAstat - "); |
1da177e4 | 212 | if (dmastat & DMASCR_ANY_ERR) |
458cf5e9 | 213 | printk(KERN_CONT "ANY_ERR "); |
1da177e4 | 214 | if (dmastat & DMASCR_MBE_ERR) |
458cf5e9 | 215 | printk(KERN_CONT "MBE_ERR "); |
1da177e4 | 216 | if (dmastat & DMASCR_PARITY_ERR_REP) |
458cf5e9 | 217 | printk(KERN_CONT "PARITY_ERR_REP "); |
1da177e4 | 218 | if (dmastat & DMASCR_PARITY_ERR_DET) |
458cf5e9 | 219 | printk(KERN_CONT "PARITY_ERR_DET "); |
1da177e4 | 220 | if (dmastat & DMASCR_SYSTEM_ERR_SIG) |
458cf5e9 | 221 | printk(KERN_CONT "SYSTEM_ERR_SIG "); |
1da177e4 | 222 | if (dmastat & DMASCR_TARGET_ABT) |
458cf5e9 | 223 | printk(KERN_CONT "TARGET_ABT "); |
1da177e4 | 224 | if (dmastat & DMASCR_MASTER_ABT) |
458cf5e9 | 225 | printk(KERN_CONT "MASTER_ABT "); |
1da177e4 | 226 | if (dmastat & DMASCR_CHAIN_COMPLETE) |
458cf5e9 | 227 | printk(KERN_CONT "CHAIN_COMPLETE "); |
1da177e4 | 228 | if (dmastat & DMASCR_DMA_COMPLETE) |
458cf5e9 | 229 | printk(KERN_CONT "DMA_COMPLETE "); |
1da177e4 LT |
230 | printk("\n"); |
231 | } | |
232 | ||
233 | /* | |
234 | * Theory of request handling | |
235 | * | |
236 | * Each bio is assigned to one mm_dma_desc - which may not be enough FIXME | |
237 | * We have two pages of mm_dma_desc, holding about 64 descriptors | |
238 | * each. These are allocated at init time. | |
239 | * One page is "Ready" and is either full, or can have request added. | |
240 | * The other page might be "Active", which DMA is happening on it. | |
241 | * | |
242 | * Whenever IO on the active page completes, the Ready page is activated | |
243 | * and the ex-Active page is clean out and made Ready. | |
7eaceacc | 244 | * Otherwise the Ready page is only activated when it becomes full. |
1da177e4 LT |
245 | * |
246 | * If a request arrives while both pages a full, it is queued, and b_rdev is | |
247 | * overloaded to record whether it was a read or a write. | |
248 | * | |
249 | * The interrupt handler only polls the device to clear the interrupt. | |
250 | * The processing of the result is done in a tasklet. | |
251 | */ | |
252 | ||
253 | static void mm_start_io(struct cardinfo *card) | |
254 | { | |
255 | /* we have the lock, we know there is | |
256 | * no IO active, and we know that card->Active | |
257 | * is set | |
258 | */ | |
259 | struct mm_dma_desc *desc; | |
260 | struct mm_page *page; | |
261 | int offset; | |
262 | ||
263 | /* make the last descriptor end the chain */ | |
264 | page = &card->mm_pages[card->Active]; | |
458cf5e9 RD |
265 | pr_debug("start_io: %d %d->%d\n", |
266 | card->Active, page->headcnt, page->cnt - 1); | |
1da177e4 LT |
267 | desc = &page->desc[page->cnt-1]; |
268 | ||
269 | desc->control_bits |= cpu_to_le32(DMASCR_CHAIN_COMP_EN); | |
270 | desc->control_bits &= ~cpu_to_le32(DMASCR_CHAIN_EN); | |
271 | desc->sem_control_bits = desc->control_bits; | |
272 | ||
4e953a21 | 273 | |
1da177e4 LT |
274 | if (debug & DEBUG_LED_ON_TRANSFER) |
275 | set_led(card, LED_REMOVE, LED_ON); | |
276 | ||
277 | desc = &page->desc[page->headcnt]; | |
278 | writel(0, card->csr_remap + DMA_PCI_ADDR); | |
279 | writel(0, card->csr_remap + DMA_PCI_ADDR + 4); | |
280 | ||
281 | writel(0, card->csr_remap + DMA_LOCAL_ADDR); | |
282 | writel(0, card->csr_remap + DMA_LOCAL_ADDR + 4); | |
283 | ||
284 | writel(0, card->csr_remap + DMA_TRANSFER_SIZE); | |
285 | writel(0, card->csr_remap + DMA_TRANSFER_SIZE + 4); | |
286 | ||
287 | writel(0, card->csr_remap + DMA_SEMAPHORE_ADDR); | |
288 | writel(0, card->csr_remap + DMA_SEMAPHORE_ADDR + 4); | |
289 | ||
458cf5e9 RD |
290 | offset = ((char *)desc) - ((char *)page->desc); |
291 | writel(cpu_to_le32((page->page_dma+offset) & 0xffffffff), | |
1da177e4 LT |
292 | card->csr_remap + DMA_DESCRIPTOR_ADDR); |
293 | /* Force the value to u64 before shifting otherwise >> 32 is undefined C | |
294 | * and on some ports will do nothing ! */ | |
295 | writel(cpu_to_le32(((u64)page->page_dma)>>32), | |
296 | card->csr_remap + DMA_DESCRIPTOR_ADDR + 4); | |
297 | ||
298 | /* Go, go, go */ | |
299 | writel(cpu_to_le32(DMASCR_GO | DMASCR_CHAIN_EN | pci_cmds), | |
300 | card->csr_remap + DMA_STATUS_CTRL); | |
301 | } | |
302 | ||
303 | static int add_bio(struct cardinfo *card); | |
304 | ||
305 | static void activate(struct cardinfo *card) | |
306 | { | |
4e953a21 | 307 | /* if No page is Active, and Ready is |
1da177e4 LT |
308 | * not empty, then switch Ready page |
309 | * to active and start IO. | |
310 | * Then add any bh's that are available to Ready | |
311 | */ | |
312 | ||
313 | do { | |
314 | while (add_bio(card)) | |
315 | ; | |
316 | ||
317 | if (card->Active == -1 && | |
318 | card->mm_pages[card->Ready].cnt > 0) { | |
319 | card->Active = card->Ready; | |
320 | card->Ready = 1-card->Ready; | |
321 | mm_start_io(card); | |
322 | } | |
323 | ||
324 | } while (card->Active == -1 && add_bio(card)); | |
325 | } | |
326 | ||
327 | static inline void reset_page(struct mm_page *page) | |
328 | { | |
329 | page->cnt = 0; | |
330 | page->headcnt = 0; | |
331 | page->bio = NULL; | |
458cf5e9 | 332 | page->biotail = &page->bio; |
1da177e4 LT |
333 | } |
334 | ||
4e953a21 | 335 | /* |
1da177e4 LT |
336 | * If there is room on Ready page, take |
337 | * one bh off list and add it. | |
338 | * return 1 if there was room, else 0. | |
339 | */ | |
340 | static int add_bio(struct cardinfo *card) | |
341 | { | |
342 | struct mm_page *p; | |
343 | struct mm_dma_desc *desc; | |
344 | dma_addr_t dma_handle; | |
345 | int offset; | |
346 | struct bio *bio; | |
eea9befa N |
347 | struct bio_vec *vec; |
348 | int idx; | |
1da177e4 LT |
349 | int rw; |
350 | int len; | |
351 | ||
352 | bio = card->currentbio; | |
353 | if (!bio && card->bio) { | |
354 | card->currentbio = card->bio; | |
eea9befa N |
355 | card->current_idx = card->bio->bi_idx; |
356 | card->current_sector = card->bio->bi_sector; | |
1da177e4 LT |
357 | card->bio = card->bio->bi_next; |
358 | if (card->bio == NULL) | |
359 | card->biotail = &card->bio; | |
360 | card->currentbio->bi_next = NULL; | |
361 | return 1; | |
362 | } | |
363 | if (!bio) | |
364 | return 0; | |
eea9befa | 365 | idx = card->current_idx; |
1da177e4 LT |
366 | |
367 | rw = bio_rw(bio); | |
368 | if (card->mm_pages[card->Ready].cnt >= DESC_PER_PAGE) | |
369 | return 0; | |
370 | ||
eea9befa N |
371 | vec = bio_iovec_idx(bio, idx); |
372 | len = vec->bv_len; | |
373 | dma_handle = pci_map_page(card->dev, | |
374 | vec->bv_page, | |
375 | vec->bv_offset, | |
1da177e4 | 376 | len, |
458cf5e9 | 377 | (rw == READ) ? |
1da177e4 LT |
378 | PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE); |
379 | ||
380 | p = &card->mm_pages[card->Ready]; | |
381 | desc = &p->desc[p->cnt]; | |
382 | p->cnt++; | |
eea9befa N |
383 | if (p->bio == NULL) |
384 | p->idx = idx; | |
1da177e4 LT |
385 | if ((p->biotail) != &bio->bi_next) { |
386 | *(p->biotail) = bio; | |
387 | p->biotail = &(bio->bi_next); | |
388 | bio->bi_next = NULL; | |
389 | } | |
390 | ||
391 | desc->data_dma_handle = dma_handle; | |
392 | ||
393 | desc->pci_addr = cpu_to_le64((u64)desc->data_dma_handle); | |
eea9befa | 394 | desc->local_addr = cpu_to_le64(card->current_sector << 9); |
1da177e4 | 395 | desc->transfer_size = cpu_to_le32(len); |
458cf5e9 | 396 | offset = (((char *)&desc->sem_control_bits) - ((char *)p->desc)); |
1da177e4 LT |
397 | desc->sem_addr = cpu_to_le64((u64)(p->page_dma+offset)); |
398 | desc->zero1 = desc->zero2 = 0; | |
458cf5e9 | 399 | offset = (((char *)(desc+1)) - ((char *)p->desc)); |
1da177e4 LT |
400 | desc->next_desc_addr = cpu_to_le64(p->page_dma+offset); |
401 | desc->control_bits = cpu_to_le32(DMASCR_GO|DMASCR_ERR_INT_EN| | |
402 | DMASCR_PARITY_INT_EN| | |
403 | DMASCR_CHAIN_EN | | |
404 | DMASCR_SEM_EN | | |
405 | pci_cmds); | |
406 | if (rw == WRITE) | |
407 | desc->control_bits |= cpu_to_le32(DMASCR_TRANSFER_READ); | |
408 | desc->sem_control_bits = desc->control_bits; | |
409 | ||
eea9befa N |
410 | card->current_sector += (len >> 9); |
411 | idx++; | |
412 | card->current_idx = idx; | |
413 | if (idx >= bio->bi_vcnt) | |
1da177e4 LT |
414 | card->currentbio = NULL; |
415 | ||
416 | return 1; | |
417 | } | |
418 | ||
419 | static void process_page(unsigned long data) | |
420 | { | |
421 | /* check if any of the requests in the page are DMA_COMPLETE, | |
422 | * and deal with them appropriately. | |
423 | * If we find a descriptor without DMA_COMPLETE in the semaphore, then | |
458cf5e9 RD |
424 | * dma must have hit an error on that descriptor, so use dma_status |
425 | * instead and assume that all following descriptors must be re-tried. | |
1da177e4 LT |
426 | */ |
427 | struct mm_page *page; | |
458cf5e9 | 428 | struct bio *return_bio = NULL; |
1da177e4 LT |
429 | struct cardinfo *card = (struct cardinfo *)data; |
430 | unsigned int dma_status = card->dma_status; | |
431 | ||
432 | spin_lock_bh(&card->lock); | |
433 | if (card->Active < 0) | |
434 | goto out_unlock; | |
435 | page = &card->mm_pages[card->Active]; | |
4e953a21 | 436 | |
1da177e4 LT |
437 | while (page->headcnt < page->cnt) { |
438 | struct bio *bio = page->bio; | |
439 | struct mm_dma_desc *desc = &page->desc[page->headcnt]; | |
440 | int control = le32_to_cpu(desc->sem_control_bits); | |
458cf5e9 | 441 | int last = 0; |
1da177e4 LT |
442 | int idx; |
443 | ||
444 | if (!(control & DMASCR_DMA_COMPLETE)) { | |
445 | control = dma_status; | |
458cf5e9 | 446 | last = 1; |
1da177e4 LT |
447 | } |
448 | page->headcnt++; | |
eea9befa N |
449 | idx = page->idx; |
450 | page->idx++; | |
451 | if (page->idx >= bio->bi_vcnt) { | |
1da177e4 | 452 | page->bio = bio->bi_next; |
794e64d5 NB |
453 | if (page->bio) |
454 | page->idx = page->bio->bi_idx; | |
eea9befa | 455 | } |
1da177e4 | 456 | |
4e953a21 | 457 | pci_unmap_page(card->dev, desc->data_dma_handle, |
458cf5e9 RD |
458 | bio_iovec_idx(bio, idx)->bv_len, |
459 | (control & DMASCR_TRANSFER_READ) ? | |
1da177e4 LT |
460 | PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); |
461 | if (control & DMASCR_HARD_ERROR) { | |
462 | /* error */ | |
463 | clear_bit(BIO_UPTODATE, &bio->bi_flags); | |
4e0af881 JG |
464 | dev_printk(KERN_WARNING, &card->dev->dev, |
465 | "I/O error on sector %d/%d\n", | |
466 | le32_to_cpu(desc->local_addr)>>9, | |
467 | le32_to_cpu(desc->transfer_size)); | |
1da177e4 | 468 | dump_dmastat(card, control); |
7b6d91da | 469 | } else if ((bio->bi_rw & REQ_WRITE) && |
458cf5e9 RD |
470 | le32_to_cpu(desc->local_addr) >> 9 == |
471 | card->init_size) { | |
472 | card->init_size += le32_to_cpu(desc->transfer_size) >> 9; | |
473 | if (card->init_size >> 1 >= card->mm_size) { | |
4e0af881 JG |
474 | dev_printk(KERN_INFO, &card->dev->dev, |
475 | "memory now initialised\n"); | |
1da177e4 LT |
476 | set_userbit(card, MEMORY_INITIALIZED, 1); |
477 | } | |
478 | } | |
479 | if (bio != page->bio) { | |
480 | bio->bi_next = return_bio; | |
481 | return_bio = bio; | |
482 | } | |
483 | ||
458cf5e9 RD |
484 | if (last) |
485 | break; | |
1da177e4 LT |
486 | } |
487 | ||
488 | if (debug & DEBUG_LED_ON_TRANSFER) | |
489 | set_led(card, LED_REMOVE, LED_OFF); | |
490 | ||
491 | if (card->check_batteries) { | |
492 | card->check_batteries = 0; | |
493 | check_batteries(card); | |
494 | } | |
495 | if (page->headcnt >= page->cnt) { | |
496 | reset_page(page); | |
497 | card->Active = -1; | |
498 | activate(card); | |
499 | } else { | |
500 | /* haven't finished with this one yet */ | |
46308c0b | 501 | pr_debug("do some more\n"); |
1da177e4 LT |
502 | mm_start_io(card); |
503 | } | |
504 | out_unlock: | |
505 | spin_unlock_bh(&card->lock); | |
506 | ||
458cf5e9 | 507 | while (return_bio) { |
1da177e4 LT |
508 | struct bio *bio = return_bio; |
509 | ||
510 | return_bio = bio->bi_next; | |
511 | bio->bi_next = NULL; | |
6712ecf8 | 512 | bio_endio(bio, 0); |
1da177e4 LT |
513 | } |
514 | } | |
515 | ||
74018dc3 | 516 | static void mm_unplug(struct blk_plug_cb *cb, bool from_schedule) |
32587371 | 517 | { |
9cbb1750 | 518 | struct cardinfo *card = cb->data; |
32587371 | 519 | |
9cbb1750 N |
520 | spin_lock_irq(&card->lock); |
521 | activate(card); | |
522 | spin_unlock_irq(&card->lock); | |
523 | kfree(cb); | |
32587371 TG |
524 | } |
525 | ||
526 | static int mm_check_plugged(struct cardinfo *card) | |
527 | { | |
9cbb1750 | 528 | return !!blk_check_plugged(mm_unplug, card, sizeof(struct blk_plug_cb)); |
32587371 TG |
529 | } |
530 | ||
5a7bbad2 | 531 | static void mm_make_request(struct request_queue *q, struct bio *bio) |
1da177e4 LT |
532 | { |
533 | struct cardinfo *card = q->queuedata; | |
f2b9ecc4 ZB |
534 | pr_debug("mm_make_request %llu %u\n", |
535 | (unsigned long long)bio->bi_sector, bio->bi_size); | |
1da177e4 | 536 | |
1da177e4 LT |
537 | spin_lock_irq(&card->lock); |
538 | *card->biotail = bio; | |
539 | bio->bi_next = NULL; | |
540 | card->biotail = &bio->bi_next; | |
32587371 TG |
541 | if (bio->bi_rw & REQ_SYNC || !mm_check_plugged(card)) |
542 | activate(card); | |
1da177e4 LT |
543 | spin_unlock_irq(&card->lock); |
544 | ||
5a7bbad2 | 545 | return; |
1da177e4 LT |
546 | } |
547 | ||
7d12e780 | 548 | static irqreturn_t mm_interrupt(int irq, void *__card) |
1da177e4 LT |
549 | { |
550 | struct cardinfo *card = (struct cardinfo *) __card; | |
551 | unsigned int dma_status; | |
552 | unsigned short cfg_status; | |
553 | ||
554 | HW_TRACE(0x30); | |
555 | ||
556 | dma_status = le32_to_cpu(readl(card->csr_remap + DMA_STATUS_CTRL)); | |
557 | ||
558 | if (!(dma_status & (DMASCR_ERROR_MASK | DMASCR_CHAIN_COMPLETE))) { | |
559 | /* interrupt wasn't for me ... */ | |
560 | return IRQ_NONE; | |
458cf5e9 | 561 | } |
1da177e4 LT |
562 | |
563 | /* clear COMPLETION interrupts */ | |
564 | if (card->flags & UM_FLAG_NO_BYTE_STATUS) | |
565 | writel(cpu_to_le32(DMASCR_DMA_COMPLETE|DMASCR_CHAIN_COMPLETE), | |
458cf5e9 | 566 | card->csr_remap + DMA_STATUS_CTRL); |
1da177e4 LT |
567 | else |
568 | writeb((DMASCR_DMA_COMPLETE|DMASCR_CHAIN_COMPLETE) >> 16, | |
458cf5e9 | 569 | card->csr_remap + DMA_STATUS_CTRL + 2); |
4e953a21 | 570 | |
1da177e4 LT |
571 | /* log errors and clear interrupt status */ |
572 | if (dma_status & DMASCR_ANY_ERR) { | |
573 | unsigned int data_log1, data_log2; | |
574 | unsigned int addr_log1, addr_log2; | |
575 | unsigned char stat, count, syndrome, check; | |
576 | ||
577 | stat = readb(card->csr_remap + MEMCTRLCMD_ERRSTATUS); | |
578 | ||
458cf5e9 RD |
579 | data_log1 = le32_to_cpu(readl(card->csr_remap + |
580 | ERROR_DATA_LOG)); | |
581 | data_log2 = le32_to_cpu(readl(card->csr_remap + | |
582 | ERROR_DATA_LOG + 4)); | |
583 | addr_log1 = le32_to_cpu(readl(card->csr_remap + | |
584 | ERROR_ADDR_LOG)); | |
1da177e4 LT |
585 | addr_log2 = readb(card->csr_remap + ERROR_ADDR_LOG + 4); |
586 | ||
587 | count = readb(card->csr_remap + ERROR_COUNT); | |
588 | syndrome = readb(card->csr_remap + ERROR_SYNDROME); | |
589 | check = readb(card->csr_remap + ERROR_CHECK); | |
590 | ||
591 | dump_dmastat(card, dma_status); | |
592 | ||
593 | if (stat & 0x01) | |
4e0af881 JG |
594 | dev_printk(KERN_ERR, &card->dev->dev, |
595 | "Memory access error detected (err count %d)\n", | |
596 | count); | |
1da177e4 | 597 | if (stat & 0x02) |
4e0af881 JG |
598 | dev_printk(KERN_ERR, &card->dev->dev, |
599 | "Multi-bit EDC error\n"); | |
1da177e4 | 600 | |
4e0af881 JG |
601 | dev_printk(KERN_ERR, &card->dev->dev, |
602 | "Fault Address 0x%02x%08x, Fault Data 0x%08x%08x\n", | |
603 | addr_log2, addr_log1, data_log2, data_log1); | |
604 | dev_printk(KERN_ERR, &card->dev->dev, | |
605 | "Fault Check 0x%02x, Fault Syndrome 0x%02x\n", | |
606 | check, syndrome); | |
1da177e4 LT |
607 | |
608 | writeb(0, card->csr_remap + ERROR_COUNT); | |
609 | } | |
610 | ||
611 | if (dma_status & DMASCR_PARITY_ERR_REP) { | |
4e0af881 JG |
612 | dev_printk(KERN_ERR, &card->dev->dev, |
613 | "PARITY ERROR REPORTED\n"); | |
1da177e4 LT |
614 | pci_read_config_word(card->dev, PCI_STATUS, &cfg_status); |
615 | pci_write_config_word(card->dev, PCI_STATUS, cfg_status); | |
616 | } | |
617 | ||
618 | if (dma_status & DMASCR_PARITY_ERR_DET) { | |
4e0af881 JG |
619 | dev_printk(KERN_ERR, &card->dev->dev, |
620 | "PARITY ERROR DETECTED\n"); | |
1da177e4 LT |
621 | pci_read_config_word(card->dev, PCI_STATUS, &cfg_status); |
622 | pci_write_config_word(card->dev, PCI_STATUS, cfg_status); | |
623 | } | |
624 | ||
625 | if (dma_status & DMASCR_SYSTEM_ERR_SIG) { | |
4e0af881 | 626 | dev_printk(KERN_ERR, &card->dev->dev, "SYSTEM ERROR\n"); |
1da177e4 LT |
627 | pci_read_config_word(card->dev, PCI_STATUS, &cfg_status); |
628 | pci_write_config_word(card->dev, PCI_STATUS, cfg_status); | |
629 | } | |
630 | ||
631 | if (dma_status & DMASCR_TARGET_ABT) { | |
4e0af881 | 632 | dev_printk(KERN_ERR, &card->dev->dev, "TARGET ABORT\n"); |
1da177e4 LT |
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_MASTER_ABT) { | |
4e0af881 | 638 | dev_printk(KERN_ERR, &card->dev->dev, "MASTER ABORT\n"); |
1da177e4 LT |
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 | /* and process the DMA descriptors */ | |
644 | card->dma_status = dma_status; | |
645 | tasklet_schedule(&card->tasklet); | |
646 | ||
647 | HW_TRACE(0x36); | |
648 | ||
4e953a21 | 649 | return IRQ_HANDLED; |
1da177e4 | 650 | } |
458cf5e9 | 651 | |
1da177e4 LT |
652 | /* |
653 | * If both batteries are good, no LED | |
654 | * If either battery has been warned, solid LED | |
655 | * If both batteries are bad, flash the LED quickly | |
656 | * If either battery is bad, flash the LED semi quickly | |
657 | */ | |
658 | static void set_fault_to_battery_status(struct cardinfo *card) | |
659 | { | |
660 | if (card->battery[0].good && card->battery[1].good) | |
661 | set_led(card, LED_FAULT, LED_OFF); | |
662 | else if (card->battery[0].warned || card->battery[1].warned) | |
663 | set_led(card, LED_FAULT, LED_ON); | |
664 | else if (!card->battery[0].good && !card->battery[1].good) | |
665 | set_led(card, LED_FAULT, LED_FLASH_7_0); | |
666 | else | |
667 | set_led(card, LED_FAULT, LED_FLASH_3_5); | |
668 | } | |
669 | ||
670 | static void init_battery_timer(void); | |
671 | ||
1da177e4 LT |
672 | static int check_battery(struct cardinfo *card, int battery, int status) |
673 | { | |
674 | if (status != card->battery[battery].good) { | |
675 | card->battery[battery].good = !card->battery[battery].good; | |
676 | card->battery[battery].last_change = jiffies; | |
677 | ||
678 | if (card->battery[battery].good) { | |
4e0af881 JG |
679 | dev_printk(KERN_ERR, &card->dev->dev, |
680 | "Battery %d now good\n", battery + 1); | |
1da177e4 LT |
681 | card->battery[battery].warned = 0; |
682 | } else | |
4e0af881 JG |
683 | dev_printk(KERN_ERR, &card->dev->dev, |
684 | "Battery %d now FAILED\n", battery + 1); | |
1da177e4 LT |
685 | |
686 | return 1; | |
687 | } else if (!card->battery[battery].good && | |
688 | !card->battery[battery].warned && | |
689 | time_after_eq(jiffies, card->battery[battery].last_change + | |
690 | (HZ * 60 * 60 * 5))) { | |
4e0af881 JG |
691 | dev_printk(KERN_ERR, &card->dev->dev, |
692 | "Battery %d still FAILED after 5 hours\n", battery + 1); | |
1da177e4 LT |
693 | card->battery[battery].warned = 1; |
694 | ||
695 | return 1; | |
696 | } | |
697 | ||
698 | return 0; | |
699 | } | |
458cf5e9 | 700 | |
1da177e4 LT |
701 | static void check_batteries(struct cardinfo *card) |
702 | { | |
703 | /* NOTE: this must *never* be called while the card | |
704 | * is doing (bus-to-card) DMA, or you will need the | |
705 | * reset switch | |
706 | */ | |
707 | unsigned char status; | |
708 | int ret1, ret2; | |
709 | ||
710 | status = readb(card->csr_remap + MEMCTRLSTATUS_BATTERY); | |
711 | if (debug & DEBUG_BATTERY_POLLING) | |
4e0af881 JG |
712 | dev_printk(KERN_DEBUG, &card->dev->dev, |
713 | "checking battery status, 1 = %s, 2 = %s\n", | |
1da177e4 LT |
714 | (status & BATTERY_1_FAILURE) ? "FAILURE" : "OK", |
715 | (status & BATTERY_2_FAILURE) ? "FAILURE" : "OK"); | |
716 | ||
717 | ret1 = check_battery(card, 0, !(status & BATTERY_1_FAILURE)); | |
718 | ret2 = check_battery(card, 1, !(status & BATTERY_2_FAILURE)); | |
719 | ||
720 | if (ret1 || ret2) | |
721 | set_fault_to_battery_status(card); | |
722 | } | |
723 | ||
724 | static void check_all_batteries(unsigned long ptr) | |
725 | { | |
726 | int i; | |
727 | ||
4e953a21 | 728 | for (i = 0; i < num_cards; i++) |
1da177e4 LT |
729 | if (!(cards[i].flags & UM_FLAG_NO_BATT)) { |
730 | struct cardinfo *card = &cards[i]; | |
731 | spin_lock_bh(&card->lock); | |
732 | if (card->Active >= 0) | |
733 | card->check_batteries = 1; | |
734 | else | |
735 | check_batteries(card); | |
736 | spin_unlock_bh(&card->lock); | |
737 | } | |
738 | ||
739 | init_battery_timer(); | |
740 | } | |
458cf5e9 | 741 | |
1da177e4 LT |
742 | static void init_battery_timer(void) |
743 | { | |
744 | init_timer(&battery_timer); | |
745 | battery_timer.function = check_all_batteries; | |
746 | battery_timer.expires = jiffies + (HZ * 60); | |
747 | add_timer(&battery_timer); | |
748 | } | |
458cf5e9 | 749 | |
1da177e4 LT |
750 | static void del_battery_timer(void) |
751 | { | |
752 | del_timer(&battery_timer); | |
753 | } | |
458cf5e9 | 754 | |
1da177e4 LT |
755 | /* |
756 | * Note no locks taken out here. In a worst case scenario, we could drop | |
757 | * a chunk of system memory. But that should never happen, since validation | |
758 | * happens at open or mount time, when locks are held. | |
759 | * | |
760 | * That's crap, since doing that while some partitions are opened | |
761 | * or mounted will give you really nasty results. | |
762 | */ | |
763 | static int mm_revalidate(struct gendisk *disk) | |
764 | { | |
765 | struct cardinfo *card = disk->private_data; | |
766 | set_capacity(disk, card->mm_size << 1); | |
767 | return 0; | |
768 | } | |
a885c8c4 CH |
769 | |
770 | static int mm_getgeo(struct block_device *bdev, struct hd_geometry *geo) | |
1da177e4 | 771 | { |
a885c8c4 CH |
772 | struct cardinfo *card = bdev->bd_disk->private_data; |
773 | int size = card->mm_size * (1024 / MM_HARDSECT); | |
1da177e4 | 774 | |
a885c8c4 CH |
775 | /* |
776 | * get geometry: we have to fake one... trim the size to a | |
777 | * multiple of 2048 (1M): tell we have 32 sectors, 64 heads, | |
778 | * whatever cylinders. | |
779 | */ | |
780 | geo->heads = 64; | |
781 | geo->sectors = 32; | |
782 | geo->cylinders = size / (geo->heads * geo->sectors); | |
783 | return 0; | |
1da177e4 | 784 | } |
a885c8c4 | 785 | |
83d5cde4 | 786 | static const struct block_device_operations mm_fops = { |
1da177e4 | 787 | .owner = THIS_MODULE, |
a885c8c4 | 788 | .getgeo = mm_getgeo, |
458cf5e9 | 789 | .revalidate_disk = mm_revalidate, |
1da177e4 | 790 | }; |
458cf5e9 | 791 | |
8d85fce7 | 792 | static int mm_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) |
1da177e4 LT |
793 | { |
794 | int ret = -ENODEV; | |
795 | struct cardinfo *card = &cards[num_cards]; | |
796 | unsigned char mem_present; | |
797 | unsigned char batt_status; | |
798 | unsigned int saved_bar, data; | |
ee4a7b68 JG |
799 | unsigned long csr_base; |
800 | unsigned long csr_len; | |
1da177e4 | 801 | int magic_number; |
4e0af881 JG |
802 | static int printed_version; |
803 | ||
804 | if (!printed_version++) | |
805 | printk(KERN_INFO DRIVER_VERSION " : " DRIVER_DESC "\n"); | |
1da177e4 | 806 | |
ee4a7b68 JG |
807 | ret = pci_enable_device(dev); |
808 | if (ret) | |
809 | return ret; | |
1da177e4 LT |
810 | |
811 | pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0xF8); | |
812 | pci_set_master(dev); | |
813 | ||
814 | card->dev = dev; | |
1da177e4 | 815 | |
ee4a7b68 JG |
816 | csr_base = pci_resource_start(dev, 0); |
817 | csr_len = pci_resource_len(dev, 0); | |
818 | if (!csr_base || !csr_len) | |
819 | return -ENODEV; | |
1da177e4 | 820 | |
4e0af881 | 821 | dev_printk(KERN_INFO, &dev->dev, |
458cf5e9 | 822 | "Micro Memory(tm) controller found (PCI Mem Module (Battery Backup))\n"); |
1da177e4 | 823 | |
6a35528a | 824 | if (pci_set_dma_mask(dev, DMA_BIT_MASK(64)) && |
284901a9 | 825 | pci_set_dma_mask(dev, DMA_BIT_MASK(32))) { |
4e0af881 | 826 | dev_printk(KERN_WARNING, &dev->dev, "NO suitable DMA found\n"); |
1da177e4 LT |
827 | return -ENOMEM; |
828 | } | |
ee4a7b68 JG |
829 | |
830 | ret = pci_request_regions(dev, DRIVER_NAME); | |
831 | if (ret) { | |
4e0af881 JG |
832 | dev_printk(KERN_ERR, &card->dev->dev, |
833 | "Unable to request memory region\n"); | |
1da177e4 LT |
834 | goto failed_req_csr; |
835 | } | |
836 | ||
ee4a7b68 | 837 | card->csr_remap = ioremap_nocache(csr_base, csr_len); |
1da177e4 | 838 | if (!card->csr_remap) { |
4e0af881 JG |
839 | dev_printk(KERN_ERR, &card->dev->dev, |
840 | "Unable to remap memory region\n"); | |
1da177e4 LT |
841 | ret = -ENOMEM; |
842 | ||
843 | goto failed_remap_csr; | |
844 | } | |
845 | ||
4e0af881 JG |
846 | dev_printk(KERN_INFO, &card->dev->dev, |
847 | "CSR 0x%08lx -> 0x%p (0x%lx)\n", | |
ee4a7b68 | 848 | csr_base, card->csr_remap, csr_len); |
1da177e4 | 849 | |
458cf5e9 | 850 | switch (card->dev->device) { |
1da177e4 LT |
851 | case 0x5415: |
852 | card->flags |= UM_FLAG_NO_BYTE_STATUS | UM_FLAG_NO_BATTREG; | |
853 | magic_number = 0x59; | |
854 | break; | |
855 | ||
856 | case 0x5425: | |
857 | card->flags |= UM_FLAG_NO_BYTE_STATUS; | |
858 | magic_number = 0x5C; | |
859 | break; | |
860 | ||
861 | case 0x6155: | |
458cf5e9 RD |
862 | card->flags |= UM_FLAG_NO_BYTE_STATUS | |
863 | UM_FLAG_NO_BATTREG | UM_FLAG_NO_BATT; | |
1da177e4 LT |
864 | magic_number = 0x99; |
865 | break; | |
866 | ||
867 | default: | |
868 | magic_number = 0x100; | |
869 | break; | |
870 | } | |
871 | ||
872 | if (readb(card->csr_remap + MEMCTRLSTATUS_MAGIC) != magic_number) { | |
4e0af881 | 873 | dev_printk(KERN_ERR, &card->dev->dev, "Magic number invalid\n"); |
1da177e4 LT |
874 | ret = -ENOMEM; |
875 | goto failed_magic; | |
876 | } | |
877 | ||
878 | card->mm_pages[0].desc = pci_alloc_consistent(card->dev, | |
458cf5e9 RD |
879 | PAGE_SIZE * 2, |
880 | &card->mm_pages[0].page_dma); | |
1da177e4 | 881 | card->mm_pages[1].desc = pci_alloc_consistent(card->dev, |
458cf5e9 RD |
882 | PAGE_SIZE * 2, |
883 | &card->mm_pages[1].page_dma); | |
1da177e4 LT |
884 | if (card->mm_pages[0].desc == NULL || |
885 | card->mm_pages[1].desc == NULL) { | |
4e0af881 | 886 | dev_printk(KERN_ERR, &card->dev->dev, "alloc failed\n"); |
1da177e4 LT |
887 | goto failed_alloc; |
888 | } | |
889 | reset_page(&card->mm_pages[0]); | |
890 | reset_page(&card->mm_pages[1]); | |
891 | card->Ready = 0; /* page 0 is ready */ | |
892 | card->Active = -1; /* no page is active */ | |
893 | card->bio = NULL; | |
894 | card->biotail = &card->bio; | |
895 | ||
896 | card->queue = blk_alloc_queue(GFP_KERNEL); | |
897 | if (!card->queue) | |
898 | goto failed_alloc; | |
899 | ||
900 | blk_queue_make_request(card->queue, mm_make_request); | |
f3c737de | 901 | card->queue->queue_lock = &card->lock; |
1da177e4 | 902 | card->queue->queuedata = card; |
1da177e4 LT |
903 | |
904 | tasklet_init(&card->tasklet, process_page, (unsigned long)card); | |
905 | ||
906 | card->check_batteries = 0; | |
4e953a21 | 907 | |
1da177e4 LT |
908 | mem_present = readb(card->csr_remap + MEMCTRLSTATUS_MEMORY); |
909 | switch (mem_present) { | |
910 | case MEM_128_MB: | |
911 | card->mm_size = 1024 * 128; | |
912 | break; | |
913 | case MEM_256_MB: | |
914 | card->mm_size = 1024 * 256; | |
915 | break; | |
916 | case MEM_512_MB: | |
917 | card->mm_size = 1024 * 512; | |
918 | break; | |
919 | case MEM_1_GB: | |
920 | card->mm_size = 1024 * 1024; | |
921 | break; | |
922 | case MEM_2_GB: | |
923 | card->mm_size = 1024 * 2048; | |
924 | break; | |
925 | default: | |
926 | card->mm_size = 0; | |
927 | break; | |
928 | } | |
929 | ||
930 | /* Clear the LED's we control */ | |
931 | set_led(card, LED_REMOVE, LED_OFF); | |
932 | set_led(card, LED_FAULT, LED_OFF); | |
933 | ||
934 | batt_status = readb(card->csr_remap + MEMCTRLSTATUS_BATTERY); | |
935 | ||
936 | card->battery[0].good = !(batt_status & BATTERY_1_FAILURE); | |
937 | card->battery[1].good = !(batt_status & BATTERY_2_FAILURE); | |
938 | card->battery[0].last_change = card->battery[1].last_change = jiffies; | |
939 | ||
4e953a21 | 940 | if (card->flags & UM_FLAG_NO_BATT) |
4e0af881 JG |
941 | dev_printk(KERN_INFO, &card->dev->dev, |
942 | "Size %d KB\n", card->mm_size); | |
1da177e4 | 943 | else { |
4e0af881 JG |
944 | dev_printk(KERN_INFO, &card->dev->dev, |
945 | "Size %d KB, Battery 1 %s (%s), Battery 2 %s (%s)\n", | |
946 | card->mm_size, | |
458cf5e9 | 947 | batt_status & BATTERY_1_DISABLED ? "Disabled" : "Enabled", |
1da177e4 | 948 | card->battery[0].good ? "OK" : "FAILURE", |
458cf5e9 | 949 | batt_status & BATTERY_2_DISABLED ? "Disabled" : "Enabled", |
1da177e4 LT |
950 | card->battery[1].good ? "OK" : "FAILURE"); |
951 | ||
952 | set_fault_to_battery_status(card); | |
953 | } | |
954 | ||
955 | pci_read_config_dword(dev, PCI_BASE_ADDRESS_1, &saved_bar); | |
956 | data = 0xffffffff; | |
957 | pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, data); | |
958 | pci_read_config_dword(dev, PCI_BASE_ADDRESS_1, &data); | |
959 | pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, saved_bar); | |
960 | data &= 0xfffffff0; | |
961 | data = ~data; | |
962 | data += 1; | |
963 | ||
458cf5e9 RD |
964 | if (request_irq(dev->irq, mm_interrupt, IRQF_SHARED, DRIVER_NAME, |
965 | card)) { | |
4e0af881 JG |
966 | dev_printk(KERN_ERR, &card->dev->dev, |
967 | "Unable to allocate IRQ\n"); | |
1da177e4 | 968 | ret = -ENODEV; |
1da177e4 LT |
969 | goto failed_req_irq; |
970 | } | |
971 | ||
4e0af881 | 972 | dev_printk(KERN_INFO, &card->dev->dev, |
ee4a7b68 | 973 | "Window size %d bytes, IRQ %d\n", data, dev->irq); |
1da177e4 | 974 | |
458cf5e9 | 975 | spin_lock_init(&card->lock); |
1da177e4 LT |
976 | |
977 | pci_set_drvdata(dev, card); | |
978 | ||
979 | if (pci_write_cmd != 0x0F) /* If not Memory Write & Invalidate */ | |
980 | pci_write_cmd = 0x07; /* then Memory Write command */ | |
981 | ||
982 | if (pci_write_cmd & 0x08) { /* use Memory Write and Invalidate */ | |
983 | unsigned short cfg_command; | |
984 | pci_read_config_word(dev, PCI_COMMAND, &cfg_command); | |
985 | cfg_command |= 0x10; /* Memory Write & Invalidate Enable */ | |
986 | pci_write_config_word(dev, PCI_COMMAND, cfg_command); | |
987 | } | |
988 | pci_cmds = (pci_read_cmd << 28) | (pci_write_cmd << 24); | |
989 | ||
990 | num_cards++; | |
991 | ||
992 | if (!get_userbit(card, MEMORY_INITIALIZED)) { | |
4e0af881 | 993 | dev_printk(KERN_INFO, &card->dev->dev, |
458cf5e9 | 994 | "memory NOT initialized. Consider over-writing whole device.\n"); |
1da177e4 LT |
995 | card->init_size = 0; |
996 | } else { | |
4e0af881 JG |
997 | dev_printk(KERN_INFO, &card->dev->dev, |
998 | "memory already initialized\n"); | |
1da177e4 LT |
999 | card->init_size = card->mm_size; |
1000 | } | |
1001 | ||
1002 | /* Enable ECC */ | |
1003 | writeb(EDC_STORE_CORRECT, card->csr_remap + MEMCTRLCMD_ERRCTRL); | |
1004 | ||
1005 | return 0; | |
1006 | ||
1007 | failed_req_irq: | |
1008 | failed_alloc: | |
1009 | if (card->mm_pages[0].desc) | |
1010 | pci_free_consistent(card->dev, PAGE_SIZE*2, | |
1011 | card->mm_pages[0].desc, | |
1012 | card->mm_pages[0].page_dma); | |
1013 | if (card->mm_pages[1].desc) | |
1014 | pci_free_consistent(card->dev, PAGE_SIZE*2, | |
1015 | card->mm_pages[1].desc, | |
1016 | card->mm_pages[1].page_dma); | |
1017 | failed_magic: | |
1da177e4 LT |
1018 | iounmap(card->csr_remap); |
1019 | failed_remap_csr: | |
ee4a7b68 | 1020 | pci_release_regions(dev); |
1da177e4 LT |
1021 | failed_req_csr: |
1022 | ||
1023 | return ret; | |
1024 | } | |
458cf5e9 | 1025 | |
1da177e4 LT |
1026 | static void mm_pci_remove(struct pci_dev *dev) |
1027 | { | |
1028 | struct cardinfo *card = pci_get_drvdata(dev); | |
1029 | ||
1030 | tasklet_kill(&card->tasklet); | |
ee4a7b68 | 1031 | free_irq(dev->irq, card); |
1da177e4 | 1032 | iounmap(card->csr_remap); |
1da177e4 LT |
1033 | |
1034 | if (card->mm_pages[0].desc) | |
1035 | pci_free_consistent(card->dev, PAGE_SIZE*2, | |
1036 | card->mm_pages[0].desc, | |
1037 | card->mm_pages[0].page_dma); | |
1038 | if (card->mm_pages[1].desc) | |
1039 | pci_free_consistent(card->dev, PAGE_SIZE*2, | |
1040 | card->mm_pages[1].desc, | |
1041 | card->mm_pages[1].page_dma); | |
1312f40e | 1042 | blk_cleanup_queue(card->queue); |
ee4a7b68 JG |
1043 | |
1044 | pci_release_regions(dev); | |
1045 | pci_disable_device(dev); | |
1da177e4 LT |
1046 | } |
1047 | ||
5874c18b | 1048 | static const struct pci_device_id mm_pci_ids[] = { |
458cf5e9 RD |
1049 | {PCI_DEVICE(PCI_VENDOR_ID_MICRO_MEMORY, PCI_DEVICE_ID_MICRO_MEMORY_5415CN)}, |
1050 | {PCI_DEVICE(PCI_VENDOR_ID_MICRO_MEMORY, PCI_DEVICE_ID_MICRO_MEMORY_5425CN)}, | |
1051 | {PCI_DEVICE(PCI_VENDOR_ID_MICRO_MEMORY, PCI_DEVICE_ID_MICRO_MEMORY_6155)}, | |
5874c18b | 1052 | { |
1da177e4 LT |
1053 | .vendor = 0x8086, |
1054 | .device = 0xB555, | |
458cf5e9 RD |
1055 | .subvendor = 0x1332, |
1056 | .subdevice = 0x5460, | |
1057 | .class = 0x050000, | |
1058 | .class_mask = 0, | |
5874c18b | 1059 | }, { /* end: all zeroes */ } |
1da177e4 LT |
1060 | }; |
1061 | ||
1062 | MODULE_DEVICE_TABLE(pci, mm_pci_ids); | |
1063 | ||
1064 | static struct pci_driver mm_pci_driver = { | |
ee4a7b68 JG |
1065 | .name = DRIVER_NAME, |
1066 | .id_table = mm_pci_ids, | |
1067 | .probe = mm_pci_probe, | |
1068 | .remove = mm_pci_remove, | |
1da177e4 | 1069 | }; |
ee4a7b68 | 1070 | |
1da177e4 LT |
1071 | static int __init mm_init(void) |
1072 | { | |
1073 | int retval, i; | |
1074 | int err; | |
1075 | ||
9bfab8ce | 1076 | retval = pci_register_driver(&mm_pci_driver); |
1da177e4 LT |
1077 | if (retval) |
1078 | return -ENOMEM; | |
1079 | ||
cb3503ca | 1080 | err = major_nr = register_blkdev(0, DRIVER_NAME); |
5a243e0e N |
1081 | if (err < 0) { |
1082 | pci_unregister_driver(&mm_pci_driver); | |
1da177e4 | 1083 | return -EIO; |
5a243e0e | 1084 | } |
1da177e4 LT |
1085 | |
1086 | for (i = 0; i < num_cards; i++) { | |
1087 | mm_gendisk[i] = alloc_disk(1 << MM_SHIFT); | |
1088 | if (!mm_gendisk[i]) | |
1089 | goto out; | |
1090 | } | |
1091 | ||
1092 | for (i = 0; i < num_cards; i++) { | |
1093 | struct gendisk *disk = mm_gendisk[i]; | |
1094 | sprintf(disk->disk_name, "umem%c", 'a'+i); | |
1da177e4 LT |
1095 | spin_lock_init(&cards[i].lock); |
1096 | disk->major = major_nr; | |
1097 | disk->first_minor = i << MM_SHIFT; | |
1098 | disk->fops = &mm_fops; | |
1099 | disk->private_data = &cards[i]; | |
1100 | disk->queue = cards[i].queue; | |
1101 | set_capacity(disk, cards[i].mm_size << 1); | |
1102 | add_disk(disk); | |
1103 | } | |
1104 | ||
1105 | init_battery_timer(); | |
4e0af881 | 1106 | printk(KERN_INFO "MM: desc_per_page = %ld\n", DESC_PER_PAGE); |
1da177e4 LT |
1107 | /* printk("mm_init: Done. 10-19-01 9:00\n"); */ |
1108 | return 0; | |
1109 | ||
1110 | out: | |
5a243e0e | 1111 | pci_unregister_driver(&mm_pci_driver); |
cb3503ca | 1112 | unregister_blkdev(major_nr, DRIVER_NAME); |
1da177e4 LT |
1113 | while (i--) |
1114 | put_disk(mm_gendisk[i]); | |
1115 | return -ENOMEM; | |
1116 | } | |
458cf5e9 | 1117 | |
1da177e4 LT |
1118 | static void __exit mm_cleanup(void) |
1119 | { | |
1120 | int i; | |
1121 | ||
1122 | del_battery_timer(); | |
1123 | ||
458cf5e9 | 1124 | for (i = 0; i < num_cards ; i++) { |
1da177e4 LT |
1125 | del_gendisk(mm_gendisk[i]); |
1126 | put_disk(mm_gendisk[i]); | |
1127 | } | |
1128 | ||
1129 | pci_unregister_driver(&mm_pci_driver); | |
1130 | ||
cb3503ca | 1131 | unregister_blkdev(major_nr, DRIVER_NAME); |
1da177e4 LT |
1132 | } |
1133 | ||
1134 | module_init(mm_init); | |
1135 | module_exit(mm_cleanup); | |
1136 | ||
1137 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
1138 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1139 | MODULE_LICENSE("GPL"); |