git.oblomov.eu Git - linux-2.6/blob - drivers/block/umem.c

   1 /*
   2  * mm.c - Micro Memory(tm) PCI memory board block device driver - v2.3
   3  *
   4  * (C) 2001 San Mehat <nettwerk@valinux.com>
   5  * (C) 2001 Johannes Erdfelt <jerdfelt@valinux.com>
   6  * (C) 2001 NeilBrown <neilb@cse.unsw.edu.au>
   7  *
   8  * This driver for the Micro Memory PCI Memory Module with Battery Backup
   9  * is Copyright Micro Memory Inc 2001-2002.  All rights reserved.
  10  *
  11  * This driver is released to the public under the terms of the
  12  *  GNU GENERAL PUBLIC LICENSE version 2
  13  * See the file COPYING for details.
  14  *
  15  * This driver provides a standard block device interface for Micro Memory(tm)
  16  * PCI based RAM boards.
  17  * 10/05/01: Phap Nguyen - Rebuilt the driver
  18  * 10/22/01: Phap Nguyen - v2.1 Added disk partitioning
  19  * 29oct2001:NeilBrown   - Use make_request_fn instead of request_fn
  20  *                       - use stand disk partitioning (so fdisk works).
  21  * 08nov2001:NeilBrown   - change driver name from "mm" to "umem"
  22  *                       - incorporate into main kernel
  23  * 08apr2002:NeilBrown   - Move some of interrupt handle to tasklet
  24  *                       - use spin_lock_bh instead of _irq
  25  *                       - Never block on make_request.  queue
  26  *                         bh's instead.
  27  *                       - unregister umem from devfs at mod unload
  28  *                       - Change version to 2.3
  29  * 07Nov2001:Phap Nguyen - Select pci read command: 06, 12, 15 (Decimal)
  30  * 07Jan2002: P. Nguyen  - Used PCI Memory Write & Invalidate for DMA
  31  * 15May2002:NeilBrown   - convert to bio for 2.5
  32  * 17May2002:NeilBrown   - remove init_mem initialisation.  Instead detect
  33  *                       - a sequence of writes that cover the card, and
  34  *                       - set initialised bit then.
  35  */
  36
  37 #include <linux/config.h>
  38 #include <linux/sched.h>
  39 #include <linux/fs.h>
  40 #include <linux/bio.h>
  41 #include <linux/kernel.h>
  42 #include <linux/mm.h>
  43 #include <linux/mman.h>
  44 #include <linux/ioctl.h>
  45 #include <linux/module.h>
  46 #include <linux/init.h>
  47 #include <linux/interrupt.h>
  48 #include <linux/smp_lock.h>
  49 #include <linux/timer.h>
  50 #include <linux/pci.h>
  51 #include <linux/slab.h>
  52
  53 #include <linux/fcntl.h>        /* O_ACCMODE */
  54 #include <linux/hdreg.h>  /* HDIO_GETGEO */
  55
  56 #include <linux/umem.h>
  57
  58 #include <asm/uaccess.h>
  59 #include <asm/io.h>
  60
  61 #define PRINTK(x...) do {} while (0)
  62 #define dprintk(x...) do {} while (0)
  63 /*#define dprintk(x...) printk(x) */
  64
  65 #define MM_MAXCARDS 4
  66 #define MM_RAHEAD 2      /* two sectors */
  67 #define MM_BLKSIZE 1024  /* 1k blocks */
  68 #define MM_HARDSECT 512  /* 512-byte hardware sectors */
  69 #define MM_SHIFT 6       /* max 64 partitions on 4 cards  */
  70
  71 /*
  72  * Version Information
  73  */
  74
  75 #define DRIVER_VERSION "v2.3"
  76 #define DRIVER_AUTHOR "San Mehat, Johannes Erdfelt, NeilBrown"
  77 #define DRIVER_DESC "Micro Memory(tm) PCI memory board block driver"
  78
  79 static int debug;
  80 /* #define HW_TRACE(x)     writeb(x,cards[0].csr_remap + MEMCTRLSTATUS_MAGIC) */
  81 #define HW_TRACE(x)
  82
  83 #define DEBUG_LED_ON_TRANSFER   0x01
  84 #define DEBUG_BATTERY_POLLING   0x02
  85
  86 module_param(debug, int, 0644);
  87 MODULE_PARM_DESC(debug, "Debug bitmask");
  88
  89 static int pci_read_cmd = 0x0C;         /* Read Multiple */
  90 module_param(pci_read_cmd, int, 0);
  91 MODULE_PARM_DESC(pci_read_cmd, "PCI read command");
  92
  93 static int pci_write_cmd = 0x0F;        /* Write and Invalidate */
  94 module_param(pci_write_cmd, int, 0);
  95 MODULE_PARM_DESC(pci_write_cmd, "PCI write command");
  96
  97 static int pci_cmds;
  98
  99 static int major_nr;
 100
 101 #include <linux/blkdev.h>
 102 #include <linux/blkpg.h>
 103
 104 struct cardinfo {
 105         int             card_number;
 106         struct pci_dev  *dev;
 107
 108         int             irq;
 109
 110         unsigned long   csr_base;
 111         unsigned char   __iomem *csr_remap;
 112         unsigned long   csr_len;
 113 #ifdef CONFIG_MM_MAP_MEMORY
 114         unsigned long   mem_base;
 115         unsigned char   __iomem *mem_remap;
 116         unsigned long   mem_len;
 117 #endif
 118
 119         unsigned int    win_size; /* PCI window size */
 120         unsigned int    mm_size;  /* size in kbytes */
 121
 122         unsigned int    init_size; /* initial segment, in sectors,
 123                                     * that we know to
 124                                     * have been written
 125                                     */
 126         struct bio      *bio, *currentbio, **biotail;
 127
 128         request_queue_t *queue;
 129
 130         struct mm_page {
 131                 dma_addr_t              page_dma;
 132                 struct mm_dma_desc      *desc;
 133                 int                     cnt, headcnt;
 134                 struct bio              *bio, **biotail;
 135         } mm_pages[2];
 136 #define DESC_PER_PAGE ((PAGE_SIZE*2)/sizeof(struct mm_dma_desc))
 137
 138         int  Active, Ready;
 139
 140         struct tasklet_struct   tasklet;
 141         unsigned int dma_status;
 142
 143         struct {
 144                 int             good;
 145                 int             warned;
 146                 unsigned long   last_change;
 147         } battery[2];
 148
 149         spinlock_t      lock;
 150         int             check_batteries;
 151
 152         int             flags;
 153 };
 154
 155 static struct cardinfo cards[MM_MAXCARDS];
 156 static struct block_device_operations mm_fops;
 157 static struct timer_list battery_timer;
 158
 159 static int num_cards = 0;
 160
 161 static struct gendisk *mm_gendisk[MM_MAXCARDS];
 162
 163 static void check_batteries(struct cardinfo *card);
 164
 165 /*
 166 -----------------------------------------------------------------------------------
 167 --                           get_userbit
 168 -----------------------------------------------------------------------------------
 169 */
 170 static int get_userbit(struct cardinfo *card, int bit)
 171 {
 172         unsigned char led;
 173
 174         led = readb(card->csr_remap + MEMCTRLCMD_LEDCTRL);
 175         return led & bit;
 176 }
 177 /*
 178 -----------------------------------------------------------------------------------
 179 --                            set_userbit
 180 -----------------------------------------------------------------------------------
 181 */
 182 static int set_userbit(struct cardinfo *card, int bit, unsigned char state)
 183 {
 184         unsigned char led;
 185
 186         led = readb(card->csr_remap + MEMCTRLCMD_LEDCTRL);
 187         if (state)
 188                 led |= bit;
 189         else
 190                 led &= ~bit;
 191         writeb(led, card->csr_remap + MEMCTRLCMD_LEDCTRL);
 192
 193         return 0;
 194 }
 195 /*
 196 -----------------------------------------------------------------------------------
 197 --                             set_led
 198 -----------------------------------------------------------------------------------
 199 */
 200 /*
 201  * NOTE: For the power LED, use the LED_POWER_* macros since they differ
 202  */
 203 static void set_led(struct cardinfo *card, int shift, unsigned char state)
 204 {
 205         unsigned char led;
 206
 207         led = readb(card->csr_remap + MEMCTRLCMD_LEDCTRL);
 208         if (state == LED_FLIP)
 209                 led ^= (1<<shift);
 210         else {
 211                 led &= ~(0x03 << shift);
 212                 led |= (state << shift);
 213         }
 214         writeb(led, card->csr_remap + MEMCTRLCMD_LEDCTRL);
 215
 216 }
 217
 218 #ifdef MM_DIAG
 219 /*
 220 -----------------------------------------------------------------------------------
 221 --                              dump_regs
 222 -----------------------------------------------------------------------------------
 223 */
 224 static void dump_regs(struct cardinfo *card)
 225 {
 226         unsigned char *p;
 227         int i, i1;
 228
 229         p = card->csr_remap;
 230         for (i = 0; i < 8; i++) {
 231                 printk(KERN_DEBUG "%p   ", p);
 232
 233                 for (i1 = 0; i1 < 16; i1++)
 234                         printk("%02x ", *p++);
 235
 236                 printk("\n");
 237         }
 238 }
 239 #endif
 240 /*
 241 -----------------------------------------------------------------------------------
 242 --                            dump_dmastat
 243 -----------------------------------------------------------------------------------
 244 */
 245 static void dump_dmastat(struct cardinfo *card, unsigned int dmastat)
 246 {
 247         printk(KERN_DEBUG "MM%d*: DMAstat - ", card->card_number);
 248         if (dmastat & DMASCR_ANY_ERR)
 249                 printk("ANY_ERR ");
 250         if (dmastat & DMASCR_MBE_ERR)
 251                 printk("MBE_ERR ");
 252         if (dmastat & DMASCR_PARITY_ERR_REP)
 253                 printk("PARITY_ERR_REP ");
 254         if (dmastat & DMASCR_PARITY_ERR_DET)
 255                 printk("PARITY_ERR_DET ");
 256         if (dmastat & DMASCR_SYSTEM_ERR_SIG)
 257                 printk("SYSTEM_ERR_SIG ");
 258         if (dmastat & DMASCR_TARGET_ABT)
 259                 printk("TARGET_ABT ");
 260         if (dmastat & DMASCR_MASTER_ABT)
 261                 printk("MASTER_ABT ");
 262         if (dmastat & DMASCR_CHAIN_COMPLETE)
 263                 printk("CHAIN_COMPLETE ");
 264         if (dmastat & DMASCR_DMA_COMPLETE)
 265                 printk("DMA_COMPLETE ");
 266         printk("\n");
 267 }
 268
 269 /*
 270  * Theory of request handling
 271  *
 272  * Each bio is assigned to one mm_dma_desc - which may not be enough FIXME
 273  * We have two pages of mm_dma_desc, holding about 64 descriptors
 274  * each.  These are allocated at init time.
 275  * One page is "Ready" and is either full, or can have request added.
 276  * The other page might be "Active", which DMA is happening on it.
 277  *
 278  * Whenever IO on the active page completes, the Ready page is activated
 279  * and the ex-Active page is clean out and made Ready.
 280  * Otherwise the Ready page is only activated when it becomes full, or
 281  * when mm_unplug_device is called via the unplug_io_fn.
 282  *
 283  * If a request arrives while both pages a full, it is queued, and b_rdev is
 284  * overloaded to record whether it was a read or a write.
 285  *
 286  * The interrupt handler only polls the device to clear the interrupt.
 287  * The processing of the result is done in a tasklet.
 288  */
 289
 290 static void mm_start_io(struct cardinfo *card)
 291 {
 292         /* we have the lock, we know there is
 293          * no IO active, and we know that card->Active
 294          * is set
 295          */
 296         struct mm_dma_desc *desc;
 297         struct mm_page *page;
 298         int offset;
 299
 300         /* make the last descriptor end the chain */
 301         page = &card->mm_pages[card->Active];
 302         PRINTK("start_io: %d %d->%d\n", card->Active, page->headcnt, page->cnt-1);
 303         desc = &page->desc[page->cnt-1];
 304
 305         desc->control_bits |= cpu_to_le32(DMASCR_CHAIN_COMP_EN);
 306         desc->control_bits &= ~cpu_to_le32(DMASCR_CHAIN_EN);
 307         desc->sem_control_bits = desc->control_bits;
 308
 309
 310         if (debug & DEBUG_LED_ON_TRANSFER)
 311                 set_led(card, LED_REMOVE, LED_ON);
 312
 313         desc = &page->desc[page->headcnt];
 314         writel(0, card->csr_remap + DMA_PCI_ADDR);
 315         writel(0, card->csr_remap + DMA_PCI_ADDR + 4);
 316
 317         writel(0, card->csr_remap + DMA_LOCAL_ADDR);
 318         writel(0, card->csr_remap + DMA_LOCAL_ADDR + 4);
 319
 320         writel(0, card->csr_remap + DMA_TRANSFER_SIZE);
 321         writel(0, card->csr_remap + DMA_TRANSFER_SIZE + 4);
 322
 323         writel(0, card->csr_remap + DMA_SEMAPHORE_ADDR);
 324         writel(0, card->csr_remap + DMA_SEMAPHORE_ADDR + 4);
 325
 326         offset = ((char*)desc) - ((char*)page->desc);
 327         writel(cpu_to_le32((page->page_dma+offset)&0xffffffff),
 328                card->csr_remap + DMA_DESCRIPTOR_ADDR);
 329         /* Force the value to u64 before shifting otherwise >> 32 is undefined C
 330          * and on some ports will do nothing ! */
 331         writel(cpu_to_le32(((u64)page->page_dma)>>32),
 332                card->csr_remap + DMA_DESCRIPTOR_ADDR + 4);
 333
 334         /* Go, go, go */
 335         writel(cpu_to_le32(DMASCR_GO | DMASCR_CHAIN_EN | pci_cmds),
 336                card->csr_remap + DMA_STATUS_CTRL);
 337 }
 338
 339 static int add_bio(struct cardinfo *card);
 340
 341 static void activate(struct cardinfo *card)
 342 {
 343         /* if No page is Active, and Ready is
 344          * not empty, then switch Ready page
 345          * to active and start IO.
 346          * Then add any bh's that are available to Ready
 347          */
 348
 349         do {
 350                 while (add_bio(card))
 351                         ;
 352
 353                 if (card->Active == -1 &&
 354                     card->mm_pages[card->Ready].cnt > 0) {
 355                         card->Active = card->Ready;
 356                         card->Ready = 1-card->Ready;
 357                         mm_start_io(card);
 358                 }
 359
 360         } while (card->Active == -1 && add_bio(card));
 361 }
 362
 363 static inline void reset_page(struct mm_page *page)
 364 {
 365         page->cnt = 0;
 366         page->headcnt = 0;
 367         page->bio = NULL;
 368         page->biotail = & page->bio;
 369 }
 370
 371 static void mm_unplug_device(request_queue_t *q)
 372 {
 373         struct cardinfo *card = q->queuedata;
 374         unsigned long flags;
 375
 376         spin_lock_irqsave(&card->lock, flags);
 377         if (blk_remove_plug(q))
 378                 activate(card);
 379         spin_unlock_irqrestore(&card->lock, flags);
 380 }
 381
 382 /*
 383  * If there is room on Ready page, take
 384  * one bh off list and add it.
 385  * return 1 if there was room, else 0.
 386  */
 387 static int add_bio(struct cardinfo *card)
 388 {
 389         struct mm_page *p;
 390         struct mm_dma_desc *desc;
 391         dma_addr_t dma_handle;
 392         int offset;
 393         struct bio *bio;
 394         int rw;
 395         int len;
 396
 397         bio = card->currentbio;
 398         if (!bio && card->bio) {
 399                 card->currentbio = card->bio;
 400                 card->bio = card->bio->bi_next;
 401                 if (card->bio == NULL)
 402                         card->biotail = &card->bio;
 403                 card->currentbio->bi_next = NULL;
 404                 return 1;
 405         }
 406         if (!bio)
 407                 return 0;
 408
 409         rw = bio_rw(bio);
 410         if (card->mm_pages[card->Ready].cnt >= DESC_PER_PAGE)
 411                 return 0;
 412
 413         len = bio_iovec(bio)->bv_len;
 414         dma_handle = pci_map_page(card->dev,
 415                                   bio_page(bio),
 416                                   bio_offset(bio),
 417                                   len,
 418                                   (rw==READ) ?
 419                                   PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE);
 420
 421         p = &card->mm_pages[card->Ready];
 422         desc = &p->desc[p->cnt];
 423         p->cnt++;
 424         if ((p->biotail) != &bio->bi_next) {
 425                 *(p->biotail) = bio;
 426                 p->biotail = &(bio->bi_next);
 427                 bio->bi_next = NULL;
 428         }
 429
 430         desc->data_dma_handle = dma_handle;
 431
 432         desc->pci_addr = cpu_to_le64((u64)desc->data_dma_handle);
 433         desc->local_addr= cpu_to_le64(bio->bi_sector << 9);
 434         desc->transfer_size = cpu_to_le32(len);
 435         offset = ( ((char*)&desc->sem_control_bits) - ((char*)p->desc));
 436         desc->sem_addr = cpu_to_le64((u64)(p->page_dma+offset));
 437         desc->zero1 = desc->zero2 = 0;
 438         offset = ( ((char*)(desc+1)) - ((char*)p->desc));
 439         desc->next_desc_addr = cpu_to_le64(p->page_dma+offset);
 440         desc->control_bits = cpu_to_le32(DMASCR_GO|DMASCR_ERR_INT_EN|
 441                                          DMASCR_PARITY_INT_EN|
 442                                          DMASCR_CHAIN_EN |
 443                                          DMASCR_SEM_EN |
 444                                          pci_cmds);
 445         if (rw == WRITE)
 446                 desc->control_bits |= cpu_to_le32(DMASCR_TRANSFER_READ);
 447         desc->sem_control_bits = desc->control_bits;
 448
 449         bio->bi_sector += (len>>9);
 450         bio->bi_size -= len;
 451         bio->bi_idx++;
 452         if (bio->bi_idx >= bio->bi_vcnt)
 453                 card->currentbio = NULL;
 454
 455         return 1;
 456 }
 457
 458 static void process_page(unsigned long data)
 459 {
 460         /* check if any of the requests in the page are DMA_COMPLETE,
 461          * and deal with them appropriately.
 462          * If we find a descriptor without DMA_COMPLETE in the semaphore, then
 463          * dma must have hit an error on that descriptor, so use dma_status instead
 464          * and assume that all following descriptors must be re-tried.
 465          */
 466         struct mm_page *page;
 467         struct bio *return_bio=NULL;
 468         struct cardinfo *card = (struct cardinfo *)data;
 469         unsigned int dma_status = card->dma_status;
 470
 471         spin_lock_bh(&card->lock);
 472         if (card->Active < 0)
 473                 goto out_unlock;
 474         page = &card->mm_pages[card->Active];
 475
 476         while (page->headcnt < page->cnt) {
 477                 struct bio *bio = page->bio;
 478                 struct mm_dma_desc *desc = &page->desc[page->headcnt];
 479                 int control = le32_to_cpu(desc->sem_control_bits);
 480                 int last=0;
 481                 int idx;
 482
 483                 if (!(control & DMASCR_DMA_COMPLETE)) {
 484                         control = dma_status;
 485                         last=1;
 486                 }
 487                 page->headcnt++;
 488                 idx = bio->bi_phys_segments;
 489                 bio->bi_phys_segments++;
 490                 if (bio->bi_phys_segments >= bio->bi_vcnt)
 491                         page->bio = bio->bi_next;
 492
 493                 pci_unmap_page(card->dev, desc->data_dma_handle,
 494                                bio_iovec_idx(bio,idx)->bv_len,
 495                                  (control& DMASCR_TRANSFER_READ) ?
 496                                 PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
 497                 if (control & DMASCR_HARD_ERROR) {
 498                         /* error */
 499                         clear_bit(BIO_UPTODATE, &bio->bi_flags);
 500                         printk(KERN_WARNING "MM%d: I/O error on sector %d/%d\n",
 501                                card->card_number,
 502                                le32_to_cpu(desc->local_addr)>>9,
 503                                le32_to_cpu(desc->transfer_size));
 504                         dump_dmastat(card, control);
 505                 } else if (test_bit(BIO_RW, &bio->bi_rw) &&
 506                            le32_to_cpu(desc->local_addr)>>9 == card->init_size) {
 507                         card->init_size += le32_to_cpu(desc->transfer_size)>>9;
 508                         if (card->init_size>>1 >= card->mm_size) {
 509                                 printk(KERN_INFO "MM%d: memory now initialised\n",
 510                                        card->card_number);
 511                                 set_userbit(card, MEMORY_INITIALIZED, 1);
 512                         }
 513                 }
 514                 if (bio != page->bio) {
 515                         bio->bi_next = return_bio;
 516                         return_bio = bio;
 517                 }
 518
 519                 if (last) break;
 520         }
 521
 522         if (debug & DEBUG_LED_ON_TRANSFER)
 523                 set_led(card, LED_REMOVE, LED_OFF);
 524
 525         if (card->check_batteries) {
 526                 card->check_batteries = 0;
 527                 check_batteries(card);
 528         }
 529         if (page->headcnt >= page->cnt) {
 530                 reset_page(page);
 531                 card->Active = -1;
 532                 activate(card);
 533         } else {
 534                 /* haven't finished with this one yet */
 535                 PRINTK("do some more\n");
 536                 mm_start_io(card);
 537         }
 538  out_unlock:
 539         spin_unlock_bh(&card->lock);
 540
 541         while(return_bio) {
 542                 struct bio *bio = return_bio;
 543
 544                 return_bio = bio->bi_next;
 545                 bio->bi_next = NULL;
 546                 bio_endio(bio, bio->bi_size, 0);
 547         }
 548 }
 549
 550 /*
 551 -----------------------------------------------------------------------------------
 552 --                              mm_make_request
 553 -----------------------------------------------------------------------------------
 554 */
 555 static int mm_make_request(request_queue_t *q, struct bio *bio)
 556 {
 557         struct cardinfo *card = q->queuedata;
 558         PRINTK("mm_make_request %ld %d\n", bh->b_rsector, bh->b_size);
 559
 560         bio->bi_phys_segments = bio->bi_idx; /* count of completed segments*/
 561         spin_lock_irq(&card->lock);
 562         *card->biotail = bio;
 563         bio->bi_next = NULL;
 564         card->biotail = &bio->bi_next;
 565         blk_plug_device(q);
 566         spin_unlock_irq(&card->lock);
 567
 568         return 0;
 569 }
 570
 571 /*
 572 -----------------------------------------------------------------------------------
 573 --                              mm_interrupt
 574 -----------------------------------------------------------------------------------
 575 */
 576 static irqreturn_t mm_interrupt(int irq, void *__card, struct pt_regs *regs)
 577 {
 578         struct cardinfo *card = (struct cardinfo *) __card;
 579         unsigned int dma_status;
 580         unsigned short cfg_status;
 581
 582 HW_TRACE(0x30);
 583
 584         dma_status = le32_to_cpu(readl(card->csr_remap + DMA_STATUS_CTRL));
 585
 586         if (!(dma_status & (DMASCR_ERROR_MASK | DMASCR_CHAIN_COMPLETE))) {
 587                 /* interrupt wasn't for me ... */
 588                 return IRQ_NONE;
 589         }
 590
 591         /* clear COMPLETION interrupts */
 592         if (card->flags & UM_FLAG_NO_BYTE_STATUS)
 593                 writel(cpu_to_le32(DMASCR_DMA_COMPLETE|DMASCR_CHAIN_COMPLETE),
 594                        card->csr_remap+ DMA_STATUS_CTRL);
 595         else
 596                 writeb((DMASCR_DMA_COMPLETE|DMASCR_CHAIN_COMPLETE) >> 16,
 597                        card->csr_remap+ DMA_STATUS_CTRL + 2);
 598
 599         /* log errors and clear interrupt status */
 600         if (dma_status & DMASCR_ANY_ERR) {
 601                 unsigned int    data_log1, data_log2;
 602                 unsigned int    addr_log1, addr_log2;
 603                 unsigned char   stat, count, syndrome, check;
 604
 605                 stat = readb(card->csr_remap + MEMCTRLCMD_ERRSTATUS);
 606
 607                 data_log1 = le32_to_cpu(readl(card->csr_remap + ERROR_DATA_LOG));
 608                 data_log2 = le32_to_cpu(readl(card->csr_remap + ERROR_DATA_LOG + 4));
 609                 addr_log1 = le32_to_cpu(readl(card->csr_remap + ERROR_ADDR_LOG));
 610                 addr_log2 = readb(card->csr_remap + ERROR_ADDR_LOG + 4);
 611
 612                 count = readb(card->csr_remap + ERROR_COUNT);
 613                 syndrome = readb(card->csr_remap + ERROR_SYNDROME);
 614                 check = readb(card->csr_remap + ERROR_CHECK);
 615
 616                 dump_dmastat(card, dma_status);
 617
 618                 if (stat & 0x01)
 619                         printk(KERN_ERR "MM%d*: Memory access error detected (err count %d)\n",
 620                                 card->card_number, count);
 621                 if (stat & 0x02)
 622                         printk(KERN_ERR "MM%d*: Multi-bit EDC error\n",
 623                                 card->card_number);
 624
 625                 printk(KERN_ERR "MM%d*: Fault Address 0x%02x%08x, Fault Data 0x%08x%08x\n",
 626                         card->card_number, addr_log2, addr_log1, data_log2, data_log1);
 627                 printk(KERN_ERR "MM%d*: Fault Check 0x%02x, Fault Syndrome 0x%02x\n",
 628                         card->card_number, check, syndrome);
 629
 630                 writeb(0, card->csr_remap + ERROR_COUNT);
 631         }
 632
 633         if (dma_status & DMASCR_PARITY_ERR_REP) {
 634                 printk(KERN_ERR "MM%d*: PARITY ERROR REPORTED\n", card->card_number);
 635                 pci_read_config_word(card->dev, PCI_STATUS, &cfg_status);
 636                 pci_write_config_word(card->dev, PCI_STATUS, cfg_status);
 637         }
 638
 639         if (dma_status & DMASCR_PARITY_ERR_DET) {
 640                 printk(KERN_ERR "MM%d*: PARITY ERROR DETECTED\n", card->card_number);
 641                 pci_read_config_word(card->dev, PCI_STATUS, &cfg_status);
 642                 pci_write_config_word(card->dev, PCI_STATUS, cfg_status);
 643         }
 644
 645         if (dma_status & DMASCR_SYSTEM_ERR_SIG) {
 646                 printk(KERN_ERR "MM%d*: SYSTEM ERROR\n", card->card_number);
 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_TARGET_ABT) {
 652                 printk(KERN_ERR "MM%d*: TARGET ABORT\n", card->card_number);
 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_MASTER_ABT) {
 658                 printk(KERN_ERR "MM%d*: MASTER ABORT\n", card->card_number);
 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         /* and process the DMA descriptors */
 664         card->dma_status = dma_status;
 665         tasklet_schedule(&card->tasklet);
 666
 667 HW_TRACE(0x36);
 668
 669         return IRQ_HANDLED;
 670 }
 671 /*
 672 -----------------------------------------------------------------------------------
 673 --                         set_fault_to_battery_status
 674 -----------------------------------------------------------------------------------
 675 */
 676 /*
 677  * If both batteries are good, no LED
 678  * If either battery has been warned, solid LED
 679  * If both batteries are bad, flash the LED quickly
 680  * If either battery is bad, flash the LED semi quickly
 681  */
 682 static void set_fault_to_battery_status(struct cardinfo *card)
 683 {
 684         if (card->battery[0].good && card->battery[1].good)
 685                 set_led(card, LED_FAULT, LED_OFF);
 686         else if (card->battery[0].warned || card->battery[1].warned)
 687                 set_led(card, LED_FAULT, LED_ON);
 688         else if (!card->battery[0].good && !card->battery[1].good)
 689                 set_led(card, LED_FAULT, LED_FLASH_7_0);
 690         else
 691                 set_led(card, LED_FAULT, LED_FLASH_3_5);
 692 }
 693
 694 static void init_battery_timer(void);
 695
 696
 697 /*
 698 -----------------------------------------------------------------------------------
 699 --                            check_battery
 700 -----------------------------------------------------------------------------------
 701 */
 702 static int check_battery(struct cardinfo *card, int battery, int status)
 703 {
 704         if (status != card->battery[battery].good) {
 705                 card->battery[battery].good = !card->battery[battery].good;
 706                 card->battery[battery].last_change = jiffies;
 707
 708                 if (card->battery[battery].good) {
 709                         printk(KERN_ERR "MM%d: Battery %d now good\n",
 710                                 card->card_number, battery + 1);
 711                         card->battery[battery].warned = 0;
 712                 } else
 713                         printk(KERN_ERR "MM%d: Battery %d now FAILED\n",
 714                                 card->card_number, battery + 1);
 715
 716                 return 1;
 717         } else if (!card->battery[battery].good &&
 718                    !card->battery[battery].warned &&
 719                    time_after_eq(jiffies, card->battery[battery].last_change +
 720                                  (HZ * 60 * 60 * 5))) {
 721                 printk(KERN_ERR "MM%d: Battery %d still FAILED after 5 hours\n",
 722                         card->card_number, battery + 1);
 723                 card->battery[battery].warned = 1;
 724
 725                 return 1;
 726         }
 727
 728         return 0;
 729 }
 730 /*
 731 -----------------------------------------------------------------------------------
 732 --                              check_batteries
 733 -----------------------------------------------------------------------------------
 734 */
 735 static void check_batteries(struct cardinfo *card)
 736 {
 737         /* NOTE: this must *never* be called while the card
 738          * is doing (bus-to-card) DMA, or you will need the
 739          * reset switch
 740          */
 741         unsigned char status;
 742         int ret1, ret2;
 743
 744         status = readb(card->csr_remap + MEMCTRLSTATUS_BATTERY);
 745         if (debug & DEBUG_BATTERY_POLLING)
 746                 printk(KERN_DEBUG "MM%d: checking battery status, 1 = %s, 2 = %s\n",
 747                        card->card_number,
 748                        (status & BATTERY_1_FAILURE) ? "FAILURE" : "OK",
 749                        (status & BATTERY_2_FAILURE) ? "FAILURE" : "OK");
 750
 751         ret1 = check_battery(card, 0, !(status & BATTERY_1_FAILURE));
 752         ret2 = check_battery(card, 1, !(status & BATTERY_2_FAILURE));
 753
 754         if (ret1 || ret2)
 755                 set_fault_to_battery_status(card);
 756 }
 757
 758 static void check_all_batteries(unsigned long ptr)
 759 {
 760         int i;
 761
 762         for (i = 0; i < num_cards; i++)
 763                 if (!(cards[i].flags & UM_FLAG_NO_BATT)) {
 764                         struct cardinfo *card = &cards[i];
 765                         spin_lock_bh(&card->lock);
 766                         if (card->Active >= 0)
 767                                 card->check_batteries = 1;
 768                         else
 769                                 check_batteries(card);
 770                         spin_unlock_bh(&card->lock);
 771                 }
 772
 773         init_battery_timer();
 774 }
 775 /*
 776 -----------------------------------------------------------------------------------
 777 --                            init_battery_timer
 778 -----------------------------------------------------------------------------------
 779 */
 780 static void init_battery_timer(void)
 781 {
 782         init_timer(&battery_timer);
 783         battery_timer.function = check_all_batteries;
 784         battery_timer.expires = jiffies + (HZ * 60);
 785         add_timer(&battery_timer);
 786 }
 787 /*
 788 -----------------------------------------------------------------------------------
 789 --                              del_battery_timer
 790 -----------------------------------------------------------------------------------
 791 */
 792 static void del_battery_timer(void)
 793 {
 794         del_timer(&battery_timer);
 795 }
 796 /*
 797 -----------------------------------------------------------------------------------
 798 --                                mm_revalidate
 799 -----------------------------------------------------------------------------------
 800 */
 801 /*
 802  * Note no locks taken out here.  In a worst case scenario, we could drop
 803  * a chunk of system memory.  But that should never happen, since validation
 804  * happens at open or mount time, when locks are held.
 805  *
 806  *      That's crap, since doing that while some partitions are opened
 807  * or mounted will give you really nasty results.
 808  */
 809 static int mm_revalidate(struct gendisk *disk)
 810 {
 811         struct cardinfo *card = disk->private_data;
 812         set_capacity(disk, card->mm_size << 1);
 813         return 0;
 814 }
 815 /*
 816 -----------------------------------------------------------------------------------
 817 --                            mm_ioctl
 818 -----------------------------------------------------------------------------------
 819 */
 820 static int mm_ioctl(struct inode *i, struct file *f, unsigned int cmd, unsigned long arg)
 821 {
 822         if (cmd == HDIO_GETGEO) {
 823                 struct cardinfo *card = i->i_bdev->bd_disk->private_data;
 824                 int size = card->mm_size * (1024 / MM_HARDSECT);
 825                 struct hd_geometry geo;
 826                 /*
 827                  * get geometry: we have to fake one...  trim the size to a
 828                  * multiple of 2048 (1M): tell we have 32 sectors, 64 heads,
 829                  * whatever cylinders.
 830                  */
 831                 geo.heads     = 64;
 832                 geo.sectors   = 32;
 833                 geo.start     = get_start_sect(i->i_bdev);
 834                 geo.cylinders = size / (geo.heads * geo.sectors);
 835
 836                 if (copy_to_user((void __user *) arg, &geo, sizeof(geo)))
 837                         return -EFAULT;
 838                 return 0;
 839         }
 840
 841         return -EINVAL;
 842 }
 843 /*
 844 -----------------------------------------------------------------------------------
 845 --                                mm_check_change
 846 -----------------------------------------------------------------------------------
 847   Future support for removable devices
 848 */
 849 static int mm_check_change(struct gendisk *disk)
 850 {
 851 /*  struct cardinfo *dev = disk->private_data; */
 852         return 0;
 853 }
 854 /*
 855 -----------------------------------------------------------------------------------
 856 --                             mm_fops
 857 -----------------------------------------------------------------------------------
 858 */
 859 static struct block_device_operations mm_fops = {
 860         .owner          = THIS_MODULE,
 861         .ioctl          = mm_ioctl,
 862         .revalidate_disk= mm_revalidate,
 863         .media_changed  = mm_check_change,
 864 };
 865 /*
 866 -----------------------------------------------------------------------------------
 867 --                                mm_pci_probe
 868 -----------------------------------------------------------------------------------
 869 */
 870 static int __devinit mm_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 871 {
 872         int ret = -ENODEV;
 873         struct cardinfo *card = &cards[num_cards];
 874         unsigned char   mem_present;
 875         unsigned char   batt_status;
 876         unsigned int    saved_bar, data;
 877         int             magic_number;
 878
 879         if (pci_enable_device(dev) < 0)
 880                 return -ENODEV;
 881
 882         pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0xF8);
 883         pci_set_master(dev);
 884
 885         card->dev         = dev;
 886         card->card_number = num_cards;
 887
 888         card->csr_base = pci_resource_start(dev, 0);
 889         card->csr_len  = pci_resource_len(dev, 0);
 890 #ifdef CONFIG_MM_MAP_MEMORY
 891         card->mem_base = pci_resource_start(dev, 1);
 892         card->mem_len  = pci_resource_len(dev, 1);
 893 #endif
 894
 895         printk(KERN_INFO "Micro Memory(tm) controller #%d found at %02x:%02x (PCI Mem Module (Battery Backup))\n",
 896                card->card_number, dev->bus->number, dev->devfn);
 897
 898         if (pci_set_dma_mask(dev, 0xffffffffffffffffLL) &&
 899             !pci_set_dma_mask(dev, 0xffffffffLL)) {
 900                 printk(KERN_WARNING "MM%d: NO suitable DMA found\n",num_cards);
 901                 return  -ENOMEM;
 902         }
 903         if (!request_mem_region(card->csr_base, card->csr_len, "Micro Memory")) {
 904                 printk(KERN_ERR "MM%d: Unable to request memory region\n", card->card_number);
 905                 ret = -ENOMEM;
 906
 907                 goto failed_req_csr;
 908         }
 909
 910         card->csr_remap = ioremap_nocache(card->csr_base, card->csr_len);
 911         if (!card->csr_remap) {
 912                 printk(KERN_ERR "MM%d: Unable to remap memory region\n", card->card_number);
 913                 ret = -ENOMEM;
 914
 915                 goto failed_remap_csr;
 916         }
 917
 918         printk(KERN_INFO "MM%d: CSR 0x%08lx -> 0x%p (0x%lx)\n", card->card_number,
 919                card->csr_base, card->csr_remap, card->csr_len);
 920
 921 #ifdef CONFIG_MM_MAP_MEMORY
 922         if (!request_mem_region(card->mem_base, card->mem_len, "Micro Memory")) {
 923                 printk(KERN_ERR "MM%d: Unable to request memory region\n", card->card_number);
 924                 ret = -ENOMEM;
 925
 926                 goto failed_req_mem;
 927         }
 928
 929         if (!(card->mem_remap = ioremap(card->mem_base, cards->mem_len))) {
 930                 printk(KERN_ERR "MM%d: Unable to remap memory region\n", card->card_number);
 931                 ret = -ENOMEM;
 932
 933                 goto failed_remap_mem;
 934         }
 935
 936         printk(KERN_INFO "MM%d: MEM 0x%8lx -> 0x%8lx (0x%lx)\n", card->card_number,
 937                card->mem_base, card->mem_remap, card->mem_len);
 938 #else
 939         printk(KERN_INFO "MM%d: MEM area not remapped (CONFIG_MM_MAP_MEMORY not set)\n",
 940                card->card_number);
 941 #endif
 942         switch(card->dev->device) {
 943         case 0x5415:
 944                 card->flags |= UM_FLAG_NO_BYTE_STATUS | UM_FLAG_NO_BATTREG;
 945                 magic_number = 0x59;
 946                 break;
 947
 948         case 0x5425:
 949                 card->flags |= UM_FLAG_NO_BYTE_STATUS;
 950                 magic_number = 0x5C;
 951                 break;
 952
 953         case 0x6155:
 954                 card->flags |= UM_FLAG_NO_BYTE_STATUS | UM_FLAG_NO_BATTREG | UM_FLAG_NO_BATT;
 955                 magic_number = 0x99;
 956                 break;
 957
 958         default:
 959                 magic_number = 0x100;
 960                 break;
 961         }
 962
 963         if (readb(card->csr_remap + MEMCTRLSTATUS_MAGIC) != magic_number) {
 964                 printk(KERN_ERR "MM%d: Magic number invalid\n", card->card_number);
 965                 ret = -ENOMEM;
 966                 goto failed_magic;
 967         }
 968
 969         card->mm_pages[0].desc = pci_alloc_consistent(card->dev,
 970                                                       PAGE_SIZE*2,
 971                                                       &card->mm_pages[0].page_dma);
 972         card->mm_pages[1].desc = pci_alloc_consistent(card->dev,
 973                                                       PAGE_SIZE*2,
 974                                                       &card->mm_pages[1].page_dma);
 975         if (card->mm_pages[0].desc == NULL ||
 976             card->mm_pages[1].desc == NULL) {
 977                 printk(KERN_ERR "MM%d: alloc failed\n", card->card_number);
 978                 goto failed_alloc;
 979         }
 980         reset_page(&card->mm_pages[0]);
 981         reset_page(&card->mm_pages[1]);
 982         card->Ready = 0;        /* page 0 is ready */
 983         card->Active = -1;      /* no page is active */
 984         card->bio = NULL;
 985         card->biotail = &card->bio;
 986
 987         card->queue = blk_alloc_queue(GFP_KERNEL);
 988         if (!card->queue)
 989                 goto failed_alloc;
 990
 991         blk_queue_make_request(card->queue, mm_make_request);
 992         card->queue->queuedata = card;
 993         card->queue->unplug_fn = mm_unplug_device;
 994
 995         tasklet_init(&card->tasklet, process_page, (unsigned long)card);
 996
 997         card->check_batteries = 0;
 998
 999         mem_present = readb(card->csr_remap + MEMCTRLSTATUS_MEMORY);
1000         switch (mem_present) {
1001         case MEM_128_MB:
1002                 card->mm_size = 1024 * 128;
1003                 break;
1004         case MEM_256_MB:
1005                 card->mm_size = 1024 * 256;
1006                 break;
1007         case MEM_512_MB:
1008                 card->mm_size = 1024 * 512;
1009                 break;
1010         case MEM_1_GB:
1011                 card->mm_size = 1024 * 1024;
1012                 break;
1013         case MEM_2_GB:
1014                 card->mm_size = 1024 * 2048;
1015                 break;
1016         default:
1017                 card->mm_size = 0;
1018                 break;
1019         }
1020
1021         /* Clear the LED's we control */
1022         set_led(card, LED_REMOVE, LED_OFF);
1023         set_led(card, LED_FAULT, LED_OFF);
1024
1025         batt_status = readb(card->csr_remap + MEMCTRLSTATUS_BATTERY);
1026
1027         card->battery[0].good = !(batt_status & BATTERY_1_FAILURE);
1028         card->battery[1].good = !(batt_status & BATTERY_2_FAILURE);
1029         card->battery[0].last_change = card->battery[1].last_change = jiffies;
1030
1031         if (card->flags & UM_FLAG_NO_BATT)
1032                 printk(KERN_INFO "MM%d: Size %d KB\n",
1033                        card->card_number, card->mm_size);
1034         else {
1035                 printk(KERN_INFO "MM%d: Size %d KB, Battery 1 %s (%s), Battery 2 %s (%s)\n",
1036                        card->card_number, card->mm_size,
1037                        (batt_status & BATTERY_1_DISABLED ? "Disabled" : "Enabled"),
1038                        card->battery[0].good ? "OK" : "FAILURE",
1039                        (batt_status & BATTERY_2_DISABLED ? "Disabled" : "Enabled"),
1040                        card->battery[1].good ? "OK" : "FAILURE");
1041
1042                 set_fault_to_battery_status(card);
1043         }
1044
1045         pci_read_config_dword(dev, PCI_BASE_ADDRESS_1, &saved_bar);
1046         data = 0xffffffff;
1047         pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, data);
1048         pci_read_config_dword(dev, PCI_BASE_ADDRESS_1, &data);
1049         pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, saved_bar);
1050         data &= 0xfffffff0;
1051         data = ~data;
1052         data += 1;
1053
1054         card->win_size = data;
1055
1056
1057         if (request_irq(dev->irq, mm_interrupt, SA_SHIRQ, "pci-umem", card)) {
1058                 printk(KERN_ERR "MM%d: Unable to allocate IRQ\n", card->card_number);
1059                 ret = -ENODEV;
1060
1061                 goto failed_req_irq;
1062         }
1063
1064         card->irq = dev->irq;
1065         printk(KERN_INFO "MM%d: Window size %d bytes, IRQ %d\n", card->card_number,
1066                card->win_size, card->irq);
1067
1068         spin_lock_init(&card->lock);
1069
1070         pci_set_drvdata(dev, card);
1071
1072         if (pci_write_cmd != 0x0F)      /* If not Memory Write & Invalidate */
1073                 pci_write_cmd = 0x07;   /* then Memory Write command */
1074
1075         if (pci_write_cmd & 0x08) { /* use Memory Write and Invalidate */
1076                 unsigned short cfg_command;
1077                 pci_read_config_word(dev, PCI_COMMAND, &cfg_command);
1078                 cfg_command |= 0x10; /* Memory Write & Invalidate Enable */
1079                 pci_write_config_word(dev, PCI_COMMAND, cfg_command);
1080         }
1081         pci_cmds = (pci_read_cmd << 28) | (pci_write_cmd << 24);
1082
1083         num_cards++;
1084
1085         if (!get_userbit(card, MEMORY_INITIALIZED)) {
1086                 printk(KERN_INFO "MM%d: memory NOT initialized. Consider over-writing whole device.\n", card->card_number);
1087                 card->init_size = 0;
1088         } else {
1089                 printk(KERN_INFO "MM%d: memory already initialized\n", card->card_number);
1090                 card->init_size = card->mm_size;
1091         }
1092
1093         /* Enable ECC */
1094         writeb(EDC_STORE_CORRECT, card->csr_remap + MEMCTRLCMD_ERRCTRL);
1095
1096         return 0;
1097
1098  failed_req_irq:
1099  failed_alloc:
1100         if (card->mm_pages[0].desc)
1101                 pci_free_consistent(card->dev, PAGE_SIZE*2,
1102                                     card->mm_pages[0].desc,
1103                                     card->mm_pages[0].page_dma);
1104         if (card->mm_pages[1].desc)
1105                 pci_free_consistent(card->dev, PAGE_SIZE*2,
1106                                     card->mm_pages[1].desc,
1107                                     card->mm_pages[1].page_dma);
1108  failed_magic:
1109 #ifdef CONFIG_MM_MAP_MEMORY
1110         iounmap(card->mem_remap);
1111  failed_remap_mem:
1112         release_mem_region(card->mem_base, card->mem_len);
1113  failed_req_mem:
1114 #endif
1115         iounmap(card->csr_remap);
1116  failed_remap_csr:
1117         release_mem_region(card->csr_base, card->csr_len);
1118  failed_req_csr:
1119
1120         return ret;
1121 }
1122 /*
1123 -----------------------------------------------------------------------------------
1124 --                              mm_pci_remove
1125 -----------------------------------------------------------------------------------
1126 */
1127 static void mm_pci_remove(struct pci_dev *dev)
1128 {
1129         struct cardinfo *card = pci_get_drvdata(dev);
1130
1131         tasklet_kill(&card->tasklet);
1132         iounmap(card->csr_remap);
1133         release_mem_region(card->csr_base, card->csr_len);
1134 #ifdef CONFIG_MM_MAP_MEMORY
1135         iounmap(card->mem_remap);
1136         release_mem_region(card->mem_base, card->mem_len);
1137 #endif
1138         free_irq(card->irq, card);
1139
1140         if (card->mm_pages[0].desc)
1141                 pci_free_consistent(card->dev, PAGE_SIZE*2,
1142                                     card->mm_pages[0].desc,
1143                                     card->mm_pages[0].page_dma);
1144         if (card->mm_pages[1].desc)
1145                 pci_free_consistent(card->dev, PAGE_SIZE*2,
1146                                     card->mm_pages[1].desc,
1147                                     card->mm_pages[1].page_dma);
1148         blk_put_queue(card->queue);
1149 }
1150
1151 static const struct pci_device_id mm_pci_ids[] = { {
1152         .vendor =       PCI_VENDOR_ID_MICRO_MEMORY,
1153         .device =       PCI_DEVICE_ID_MICRO_MEMORY_5415CN,
1154         }, {
1155         .vendor =       PCI_VENDOR_ID_MICRO_MEMORY,
1156         .device =       PCI_DEVICE_ID_MICRO_MEMORY_5425CN,
1157         }, {
1158         .vendor =       PCI_VENDOR_ID_MICRO_MEMORY,
1159         .device =       PCI_DEVICE_ID_MICRO_MEMORY_6155,
1160         }, {
1161         .vendor =       0x8086,
1162         .device =       0xB555,
1163         .subvendor=     0x1332,
1164         .subdevice=     0x5460,
1165         .class  =       0x050000,
1166         .class_mask=    0,
1167         }, { /* end: all zeroes */ }
1168 };
1169
1170 MODULE_DEVICE_TABLE(pci, mm_pci_ids);
1171
1172 static struct pci_driver mm_pci_driver = {
1173         .name =         "umem",
1174         .id_table =     mm_pci_ids,
1175         .probe =        mm_pci_probe,
1176         .remove =       mm_pci_remove,
1177 };
1178 /*
1179 -----------------------------------------------------------------------------------
1180 --                               mm_init
1181 -----------------------------------------------------------------------------------
1182 */
1183
1184 static int __init mm_init(void)
1185 {
1186         int retval, i;
1187         int err;
1188
1189         printk(KERN_INFO DRIVER_VERSION " : " DRIVER_DESC "\n");
1190
1191         retval = pci_module_init(&mm_pci_driver);
1192         if (retval)
1193                 return -ENOMEM;
1194
1195         err = major_nr = register_blkdev(0, "umem");
1196         if (err < 0)
1197                 return -EIO;
1198
1199         for (i = 0; i < num_cards; i++) {
1200                 mm_gendisk[i] = alloc_disk(1 << MM_SHIFT);
1201                 if (!mm_gendisk[i])
1202                         goto out;
1203         }
1204
1205         for (i = 0; i < num_cards; i++) {
1206                 struct gendisk *disk = mm_gendisk[i];
1207                 sprintf(disk->disk_name, "umem%c", 'a'+i);
1208                 sprintf(disk->devfs_name, "umem/card%d", i);
1209                 spin_lock_init(&cards[i].lock);
1210                 disk->major = major_nr;
1211                 disk->first_minor  = i << MM_SHIFT;
1212                 disk->fops = &mm_fops;
1213                 disk->private_data = &cards[i];
1214                 disk->queue = cards[i].queue;
1215                 set_capacity(disk, cards[i].mm_size << 1);
1216                 add_disk(disk);
1217         }
1218
1219         init_battery_timer();
1220         printk("MM: desc_per_page = %ld\n", DESC_PER_PAGE);
1221 /* printk("mm_init: Done. 10-19-01 9:00\n"); */
1222         return 0;
1223
1224 out:
1225         unregister_blkdev(major_nr, "umem");
1226         while (i--)
1227                 put_disk(mm_gendisk[i]);
1228         return -ENOMEM;
1229 }
1230 /*
1231 -----------------------------------------------------------------------------------
1232 --                             mm_cleanup
1233 -----------------------------------------------------------------------------------
1234 */
1235 static void __exit mm_cleanup(void)
1236 {
1237         int i;
1238
1239         del_battery_timer();
1240
1241         for (i=0; i < num_cards ; i++) {
1242                 del_gendisk(mm_gendisk[i]);
1243                 put_disk(mm_gendisk[i]);
1244         }
1245
1246         pci_unregister_driver(&mm_pci_driver);
1247
1248         unregister_blkdev(major_nr, "umem");
1249 }
1250
1251 module_init(mm_init);
1252 module_exit(mm_cleanup);
1253
1254 MODULE_AUTHOR(DRIVER_AUTHOR);
1255 MODULE_DESCRIPTION(DRIVER_DESC);
1256 MODULE_LICENSE("GPL");