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drivers/block/umem: use dev_printk()
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CommitLineData
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
74static 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
81module_param(debug, int, 0644);
82MODULE_PARM_DESC(debug, "Debug bitmask");
83
84static int pci_read_cmd = 0x0C; /* Read Multiple */
85module_param(pci_read_cmd, int, 0);
86MODULE_PARM_DESC(pci_read_cmd, "PCI read command");
87
88static int pci_write_cmd = 0x0F; /* Write and Invalidate */
89module_param(pci_write_cmd, int, 0);
90MODULE_PARM_DESC(pci_write_cmd, "PCI write command");
91
92static int pci_cmds;
93
94static int major_nr;
95
96#include <linux/blkdev.h>
97#include <linux/blkpg.h>
98
99struct 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
146static struct cardinfo cards[MM_MAXCARDS];
147static struct block_device_operations mm_fops;
148static struct timer_list battery_timer;
149
150static int num_cards = 0;
151
152static struct gendisk *mm_gendisk[MM_MAXCARDS];
153
154static void check_batteries(struct cardinfo *card);
155
156/*
157-----------------------------------------------------------------------------------
158-- get_userbit
159-----------------------------------------------------------------------------------
160*/
161static 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*/
173static 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 */
194static 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*/
215static 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*/
236static 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
281static 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
330static int add_bio(struct cardinfo *card);
331
332static 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
354static 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 362static 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 */
378static 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
457static 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 556static 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 577static 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
583HW_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
673HW_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 */
688static 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
700static void init_battery_timer(void);
701
702
703/*
704-----------------------------------------------------------------------------------
705-- check_battery
706-----------------------------------------------------------------------------------
707*/
708static 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*/
741static 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
764static 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*/
786static 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*/
798static 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 */
815static 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
822static 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*/
844static 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*/
854static 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*/
865static 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*/
1102static 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		 1122static 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
1136MODULE_DEVICE_TABLE(pci, mm_pci_ids);
1137
1138static 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
1150static 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
1189out:
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*/
1201static 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
1217module_init(mm_init);
1218module_exit(mm_cleanup);
1219
1220MODULE_AUTHOR(DRIVER_AUTHOR);
1221MODULE_DESCRIPTION(DRIVER_DESC);
1222MODULE_LICENSE("GPL");
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