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 //#define DEBUG /* uncomment if you want debugging info (pr_debug) */
  38 #include <linux/fs.h>
  39 #include <linux/bio.h>
  40 #include <linux/kernel.h>
  41 #include <linux/mm.h>
  42 #include <linux/mman.h>
  43 #include <linux/ioctl.h>
  44 #include <linux/module.h>
  45 #include <linux/init.h>
  46 #include <linux/interrupt.h>
  47 #include <linux/timer.h>
  48 #include <linux/pci.h>
  49 #include <linux/slab.h>
  50 #include <linux/dma-mapping.h>
  51
  52 #include <linux/fcntl.h>        /* O_ACCMODE */
  53 #include <linux/hdreg.h>  /* HDIO_GETGEO */
  54
  55 #include <linux/umem.h>
  56
  57 #include <asm/uaccess.h>
  58 #include <asm/io.h>
  59
  60 #define MM_MAXCARDS 4
  61 #define MM_RAHEAD 2      /* two sectors */
  62 #define MM_BLKSIZE 1024  /* 1k blocks */
  63 #define MM_HARDSECT 512  /* 512-byte hardware sectors */
  64 #define MM_SHIFT 6       /* max 64 partitions on 4 cards  */
  65
  66 /*
  67  * Version Information
  68  */
  69
  70 #define DRIVER_VERSION "v2.3"
  71 #define DRIVER_AUTHOR "San Mehat, Johannes Erdfelt, NeilBrown"
  72 #define DRIVER_DESC "Micro Memory(tm) PCI memory board block driver"
  73
  74 static int debug;
  75 /* #define HW_TRACE(x)     writeb(x,cards[0].csr_remap + MEMCTRLSTATUS_MAGIC) */
  76 #define HW_TRACE(x)
  77
  78 #define DEBUG_LED_ON_TRANSFER   0x01
  79 #define DEBUG_BATTERY_POLLING   0x02
  80
  81 module_param(debug, int, 0644);
  82 MODULE_PARM_DESC(debug, "Debug bitmask");
  83
  84 static int pci_read_cmd = 0x0C;         /* Read Multiple */
  85 module_param(pci_read_cmd, int, 0);
  86 MODULE_PARM_DESC(pci_read_cmd, "PCI read command");
  87
  88 static int pci_write_cmd = 0x0F;        /* Write and Invalidate */
  89 module_param(pci_write_cmd, int, 0);
  90 MODULE_PARM_DESC(pci_write_cmd, "PCI write command");
  91
  92 static int pci_cmds;
  93
  94 static int major_nr;
  95
  96 #include <linux/blkdev.h>
  97 #include <linux/blkpg.h>
  98
  99 struct cardinfo {
 100         int             card_number;
 101         struct pci_dev  *dev;
 102
 103         int             irq;
 104
 105         unsigned long   csr_base;
 106         unsigned char   __iomem *csr_remap;
 107         unsigned long   csr_len;
 108 #ifdef CONFIG_MM_MAP_MEMORY
 109         unsigned long   mem_base;
 110         unsigned char   __iomem *mem_remap;
 111         unsigned long   mem_len;
 112 #endif
 113
 114         unsigned int    win_size; /* PCI window size */
 115         unsigned int    mm_size;  /* size in kbytes */
 116
 117         unsigned int    init_size; /* initial segment, in sectors,
 118                                     * that we know to
 119                                     * have been written
 120                                     */
 121         struct bio      *bio, *currentbio, **biotail;
 122
 123         request_queue_t *queue;
 124
 125         struct mm_page {
 126                 dma_addr_t              page_dma;
 127                 struct mm_dma_desc      *desc;
 128                 int                     cnt, headcnt;
 129                 struct bio              *bio, **biotail;
 130         } mm_pages[2];
 131 #define DESC_PER_PAGE ((PAGE_SIZE*2)/sizeof(struct mm_dma_desc))
 132
 133         int  Active, Ready;
 134
 135         struct tasklet_struct   tasklet;
 136         unsigned int dma_status;
 137
 138         struct {
 139                 int             good;
 140                 int             warned;
 141                 unsigned long   last_change;
 142         } battery[2];
 143
 144         spinlock_t      lock;
 145         int             check_batteries;
 146
 147         int             flags;
 148 };
 149
 150 static struct cardinfo cards[MM_MAXCARDS];
 151 static struct block_device_operations mm_fops;
 152 static struct timer_list battery_timer;
 153
 154 static int num_cards = 0;
 155
 156 static struct gendisk *mm_gendisk[MM_MAXCARDS];
 157
 158 static void check_batteries(struct cardinfo *card);
 159
 160 /*
 161 -----------------------------------------------------------------------------------
 162 --                           get_userbit
 163 -----------------------------------------------------------------------------------
 164 */
 165 static int get_userbit(struct cardinfo *card, int bit)
 166 {
 167         unsigned char led;
 168
 169         led = readb(card->csr_remap + MEMCTRLCMD_LEDCTRL);
 170         return led & bit;
 171 }
 172 /*
 173 -----------------------------------------------------------------------------------
 174 --                            set_userbit
 175 -----------------------------------------------------------------------------------
 176 */
 177 static int set_userbit(struct cardinfo *card, int bit, unsigned char state)
 178 {
 179         unsigned char led;
 180
 181         led = readb(card->csr_remap + MEMCTRLCMD_LEDCTRL);
 182         if (state)
 183                 led |= bit;
 184         else
 185                 led &= ~bit;
 186         writeb(led, card->csr_remap + MEMCTRLCMD_LEDCTRL);
 187
 188         return 0;
 189 }
 190 /*
 191 -----------------------------------------------------------------------------------
 192 --                             set_led
 193 -----------------------------------------------------------------------------------
 194 */
 195 /*
 196  * NOTE: For the power LED, use the LED_POWER_* macros since they differ
 197  */
 198 static void set_led(struct cardinfo *card, int shift, unsigned char state)
 199 {
 200         unsigned char led;
 201
 202         led = readb(card->csr_remap + MEMCTRLCMD_LEDCTRL);
 203         if (state == LED_FLIP)
 204                 led ^= (1<<shift);
 205         else {
 206                 led &= ~(0x03 << shift);
 207                 led |= (state << shift);
 208         }
 209         writeb(led, card->csr_remap + MEMCTRLCMD_LEDCTRL);
 210
 211 }
 212
 213 #ifdef MM_DIAG
 214 /*
 215 -----------------------------------------------------------------------------------
 216 --                              dump_regs
 217 -----------------------------------------------------------------------------------
 218 */
 219 static void dump_regs(struct cardinfo *card)
 220 {
 221         unsigned char *p;
 222         int i, i1;
 223
 224         p = card->csr_remap;
 225         for (i = 0; i < 8; i++) {
 226                 printk(KERN_DEBUG "%p   ", p);
 227
 228                 for (i1 = 0; i1 < 16; i1++)
 229                         printk("%02x ", *p++);
 230
 231                 printk("\n");
 232         }
 233 }
 234 #endif
 235 /*
 236 -----------------------------------------------------------------------------------
 237 --                            dump_dmastat
 238 -----------------------------------------------------------------------------------
 239 */
 240 static void dump_dmastat(struct cardinfo *card, unsigned int dmastat)
 241 {
 242         printk(KERN_DEBUG "MM%d*: DMAstat - ", card->card_number);
 243         if (dmastat & DMASCR_ANY_ERR)
 244                 printk("ANY_ERR ");
 245         if (dmastat & DMASCR_MBE_ERR)
 246                 printk("MBE_ERR ");
 247         if (dmastat & DMASCR_PARITY_ERR_REP)
 248                 printk("PARITY_ERR_REP ");
 249         if (dmastat & DMASCR_PARITY_ERR_DET)
 250                 printk("PARITY_ERR_DET ");
 251         if (dmastat & DMASCR_SYSTEM_ERR_SIG)
 252                 printk("SYSTEM_ERR_SIG ");
 253         if (dmastat & DMASCR_TARGET_ABT)
 254                 printk("TARGET_ABT ");
 255         if (dmastat & DMASCR_MASTER_ABT)
 256                 printk("MASTER_ABT ");
 257         if (dmastat & DMASCR_CHAIN_COMPLETE)
 258                 printk("CHAIN_COMPLETE ");
 259         if (dmastat & DMASCR_DMA_COMPLETE)
 260                 printk("DMA_COMPLETE ");
 261         printk("\n");
 262 }
 263
 264 /*
 265  * Theory of request handling
 266  *
 267  * Each bio is assigned to one mm_dma_desc - which may not be enough FIXME
 268  * We have two pages of mm_dma_desc, holding about 64 descriptors
 269  * each.  These are allocated at init time.
 270  * One page is "Ready" and is either full, or can have request added.
 271  * The other page might be "Active", which DMA is happening on it.
 272  *
 273  * Whenever IO on the active page completes, the Ready page is activated
 274  * and the ex-Active page is clean out and made Ready.
 275  * Otherwise the Ready page is only activated when it becomes full, or
 276  * when mm_unplug_device is called via the unplug_io_fn.
 277  *
 278  * If a request arrives while both pages a full, it is queued, and b_rdev is
 279  * overloaded to record whether it was a read or a write.
 280  *
 281  * The interrupt handler only polls the device to clear the interrupt.
 282  * The processing of the result is done in a tasklet.
 283  */
 284
 285 static void mm_start_io(struct cardinfo *card)
 286 {
 287         /* we have the lock, we know there is
 288          * no IO active, and we know that card->Active
 289          * is set
 290          */
 291         struct mm_dma_desc *desc;
 292         struct mm_page *page;
 293         int offset;
 294
 295         /* make the last descriptor end the chain */
 296         page = &card->mm_pages[card->Active];
 297         pr_debug("start_io: %d %d->%d\n", card->Active, page->headcnt, page->cnt-1);
 298         desc = &page->desc[page->cnt-1];
 299
 300         desc->control_bits |= cpu_to_le32(DMASCR_CHAIN_COMP_EN);
 301         desc->control_bits &= ~cpu_to_le32(DMASCR_CHAIN_EN);
 302         desc->sem_control_bits = desc->control_bits;
 303
 304
 305         if (debug & DEBUG_LED_ON_TRANSFER)
 306                 set_led(card, LED_REMOVE, LED_ON);
 307
 308         desc = &page->desc[page->headcnt];
 309         writel(0, card->csr_remap + DMA_PCI_ADDR);
 310         writel(0, card->csr_remap + DMA_PCI_ADDR + 4);
 311
 312         writel(0, card->csr_remap + DMA_LOCAL_ADDR);
 313         writel(0, card->csr_remap + DMA_LOCAL_ADDR + 4);
 314
 315         writel(0, card->csr_remap + DMA_TRANSFER_SIZE);
 316         writel(0, card->csr_remap + DMA_TRANSFER_SIZE + 4);
 317
 318         writel(0, card->csr_remap + DMA_SEMAPHORE_ADDR);
 319         writel(0, card->csr_remap + DMA_SEMAPHORE_ADDR + 4);
 320
 321         offset = ((char*)desc) - ((char*)page->desc);
 322         writel(cpu_to_le32((page->page_dma+offset)&0xffffffff),
 323                card->csr_remap + DMA_DESCRIPTOR_ADDR);
 324         /* Force the value to u64 before shifting otherwise >> 32 is undefined C
 325          * and on some ports will do nothing ! */
 326         writel(cpu_to_le32(((u64)page->page_dma)>>32),
 327                card->csr_remap + DMA_DESCRIPTOR_ADDR + 4);
 328
 329         /* Go, go, go */
 330         writel(cpu_to_le32(DMASCR_GO | DMASCR_CHAIN_EN | pci_cmds),
 331                card->csr_remap + DMA_STATUS_CTRL);
 332 }
 333
 334 static int add_bio(struct cardinfo *card);
 335
 336 static void activate(struct cardinfo *card)
 337 {
 338         /* if No page is Active, and Ready is
 339          * not empty, then switch Ready page
 340          * to active and start IO.
 341          * Then add any bh's that are available to Ready
 342          */
 343
 344         do {
 345                 while (add_bio(card))
 346                         ;
 347
 348                 if (card->Active == -1 &&
 349                     card->mm_pages[card->Ready].cnt > 0) {
 350                         card->Active = card->Ready;
 351                         card->Ready = 1-card->Ready;
 352                         mm_start_io(card);
 353                 }
 354
 355         } while (card->Active == -1 && add_bio(card));
 356 }
 357
 358 static inline void reset_page(struct mm_page *page)
 359 {
 360         page->cnt = 0;
 361         page->headcnt = 0;
 362         page->bio = NULL;
 363         page->biotail = & page->bio;
 364 }
 365
 366 static void mm_unplug_device(request_queue_t *q)
 367 {
 368         struct cardinfo *card = q->queuedata;
 369         unsigned long flags;
 370
 371         spin_lock_irqsave(&card->lock, flags);
 372         if (blk_remove_plug(q))
 373                 activate(card);
 374         spin_unlock_irqrestore(&card->lock, flags);
 375 }
 376
 377 /*
 378  * If there is room on Ready page, take
 379  * one bh off list and add it.
 380  * return 1 if there was room, else 0.
 381  */
 382 static int add_bio(struct cardinfo *card)
 383 {
 384         struct mm_page *p;
 385         struct mm_dma_desc *desc;
 386         dma_addr_t dma_handle;
 387         int offset;
 388         struct bio *bio;
 389         int rw;
 390         int len;
 391
 392         bio = card->currentbio;
 393         if (!bio && card->bio) {
 394                 card->currentbio = card->bio;
 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;
 403
 404         rw = bio_rw(bio);
 405         if (card->mm_pages[card->Ready].cnt >= DESC_PER_PAGE)
 406                 return 0;
 407
 408         len = bio_iovec(bio)->bv_len;
 409         dma_handle = pci_map_page(card->dev,
 410                                   bio_page(bio),
 411                                   bio_offset(bio),
 412                                   len,
 413                                   (rw==READ) ?
 414                                   PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE);
 415
 416         p = &card->mm_pages[card->Ready];
 417         desc = &p->desc[p->cnt];
 418         p->cnt++;
 419         if ((p->biotail) != &bio->bi_next) {
 420                 *(p->biotail) = bio;
 421                 p->biotail = &(bio->bi_next);
 422                 bio->bi_next = NULL;
 423         }
 424
 425         desc->data_dma_handle = dma_handle;
 426
 427         desc->pci_addr = cpu_to_le64((u64)desc->data_dma_handle);
 428         desc->local_addr= cpu_to_le64(bio->bi_sector << 9);
 429         desc->transfer_size = cpu_to_le32(len);
 430         offset = ( ((char*)&desc->sem_control_bits) - ((char*)p->desc));
 431         desc->sem_addr = cpu_to_le64((u64)(p->page_dma+offset));
 432         desc->zero1 = desc->zero2 = 0;
 433         offset = ( ((char*)(desc+1)) - ((char*)p->desc));
 434         desc->next_desc_addr = cpu_to_le64(p->page_dma+offset);
 435         desc->control_bits = cpu_to_le32(DMASCR_GO|DMASCR_ERR_INT_EN|
 436                                          DMASCR_PARITY_INT_EN|
 437                                          DMASCR_CHAIN_EN |
 438                                          DMASCR_SEM_EN |
 439                                          pci_cmds);
 440         if (rw == WRITE)
 441                 desc->control_bits |= cpu_to_le32(DMASCR_TRANSFER_READ);
 442         desc->sem_control_bits = desc->control_bits;
 443
 444         bio->bi_sector += (len>>9);
 445         bio->bi_size -= len;
 446         bio->bi_idx++;
 447         if (bio->bi_idx >= bio->bi_vcnt)
 448                 card->currentbio = NULL;
 449
 450         return 1;
 451 }
 452
 453 static void process_page(unsigned long data)
 454 {
 455         /* check if any of the requests in the page are DMA_COMPLETE,
 456          * and deal with them appropriately.
 457          * If we find a descriptor without DMA_COMPLETE in the semaphore, then
 458          * dma must have hit an error on that descriptor, so use dma_status instead
 459          * and assume that all following descriptors must be re-tried.
 460          */
 461         struct mm_page *page;
 462         struct bio *return_bio=NULL;
 463         struct cardinfo *card = (struct cardinfo *)data;
 464         unsigned int dma_status = card->dma_status;
 465
 466         spin_lock_bh(&card->lock);
 467         if (card->Active < 0)
 468                 goto out_unlock;
 469         page = &card->mm_pages[card->Active];
 470
 471         while (page->headcnt < page->cnt) {
 472                 struct bio *bio = page->bio;
 473                 struct mm_dma_desc *desc = &page->desc[page->headcnt];
 474                 int control = le32_to_cpu(desc->sem_control_bits);
 475                 int last=0;
 476                 int idx;
 477
 478                 if (!(control & DMASCR_DMA_COMPLETE)) {
 479                         control = dma_status;
 480                         last=1;
 481                 }
 482                 page->headcnt++;
 483                 idx = bio->bi_phys_segments;
 484                 bio->bi_phys_segments++;
 485                 if (bio->bi_phys_segments >= bio->bi_vcnt)
 486                         page->bio = bio->bi_next;
 487
 488                 pci_unmap_page(card->dev, desc->data_dma_handle,
 489                                bio_iovec_idx(bio,idx)->bv_len,
 490                                  (control& DMASCR_TRANSFER_READ) ?
 491                                 PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
 492                 if (control & DMASCR_HARD_ERROR) {
 493                         /* error */
 494                         clear_bit(BIO_UPTODATE, &bio->bi_flags);
 495                         printk(KERN_WARNING "MM%d: I/O error on sector %d/%d\n",
 496                                card->card_number,
 497                                le32_to_cpu(desc->local_addr)>>9,
 498                                le32_to_cpu(desc->transfer_size));
 499                         dump_dmastat(card, control);
 500                 } else if (test_bit(BIO_RW, &bio->bi_rw) &&
 501                            le32_to_cpu(desc->local_addr)>>9 == card->init_size) {
 502                         card->init_size += le32_to_cpu(desc->transfer_size)>>9;
 503                         if (card->init_size>>1 >= card->mm_size) {
 504                                 printk(KERN_INFO "MM%d: memory now initialised\n",
 505                                        card->card_number);
 506                                 set_userbit(card, MEMORY_INITIALIZED, 1);
 507                         }
 508                 }
 509                 if (bio != page->bio) {
 510                         bio->bi_next = return_bio;
 511                         return_bio = bio;
 512                 }
 513
 514                 if (last) break;
 515         }
 516
 517         if (debug & DEBUG_LED_ON_TRANSFER)
 518                 set_led(card, LED_REMOVE, LED_OFF);
 519
 520         if (card->check_batteries) {
 521                 card->check_batteries = 0;
 522                 check_batteries(card);
 523         }
 524         if (page->headcnt >= page->cnt) {
 525                 reset_page(page);
 526                 card->Active = -1;
 527                 activate(card);
 528         } else {
 529                 /* haven't finished with this one yet */
 530                 pr_debug("do some more\n");
 531                 mm_start_io(card);
 532         }
 533  out_unlock:
 534         spin_unlock_bh(&card->lock);
 535
 536         while(return_bio) {
 537                 struct bio *bio = return_bio;
 538
 539                 return_bio = bio->bi_next;
 540                 bio->bi_next = NULL;
 541                 bio_endio(bio, bio->bi_size, 0);
 542         }
 543 }
 544
 545 /*
 546 -----------------------------------------------------------------------------------
 547 --                              mm_make_request
 548 -----------------------------------------------------------------------------------
 549 */
 550 static int mm_make_request(request_queue_t *q, struct bio *bio)
 551 {
 552         struct cardinfo *card = q->queuedata;
 553         pr_debug("mm_make_request %llu %u\n",
 554                  (unsigned long long)bio->bi_sector, bio->bi_size);
 555
 556         bio->bi_phys_segments = bio->bi_idx; /* count of completed segments*/
 557         spin_lock_irq(&card->lock);
 558         *card->biotail = bio;
 559         bio->bi_next = NULL;
 560         card->biotail = &bio->bi_next;
 561         blk_plug_device(q);
 562         spin_unlock_irq(&card->lock);
 563
 564         return 0;
 565 }
 566
 567 /*
 568 -----------------------------------------------------------------------------------
 569 --                              mm_interrupt
 570 -----------------------------------------------------------------------------------
 571 */
 572 static irqreturn_t mm_interrupt(int irq, void *__card)
 573 {
 574         struct cardinfo *card = (struct cardinfo *) __card;
 575         unsigned int dma_status;
 576         unsigned short cfg_status;
 577
 578 HW_TRACE(0x30);
 579
 580         dma_status = le32_to_cpu(readl(card->csr_remap + DMA_STATUS_CTRL));
 581
 582         if (!(dma_status & (DMASCR_ERROR_MASK | DMASCR_CHAIN_COMPLETE))) {
 583                 /* interrupt wasn't for me ... */
 584                 return IRQ_NONE;
 585         }
 586
 587         /* clear COMPLETION interrupts */
 588         if (card->flags & UM_FLAG_NO_BYTE_STATUS)
 589                 writel(cpu_to_le32(DMASCR_DMA_COMPLETE|DMASCR_CHAIN_COMPLETE),
 590                        card->csr_remap+ DMA_STATUS_CTRL);
 591         else
 592                 writeb((DMASCR_DMA_COMPLETE|DMASCR_CHAIN_COMPLETE) >> 16,
 593                        card->csr_remap+ DMA_STATUS_CTRL + 2);
 594
 595         /* log errors and clear interrupt status */
 596         if (dma_status & DMASCR_ANY_ERR) {
 597                 unsigned int    data_log1, data_log2;
 598                 unsigned int    addr_log1, addr_log2;
 599                 unsigned char   stat, count, syndrome, check;
 600
 601                 stat = readb(card->csr_remap + MEMCTRLCMD_ERRSTATUS);
 602
 603                 data_log1 = le32_to_cpu(readl(card->csr_remap + ERROR_DATA_LOG));
 604                 data_log2 = le32_to_cpu(readl(card->csr_remap + ERROR_DATA_LOG + 4));
 605                 addr_log1 = le32_to_cpu(readl(card->csr_remap + ERROR_ADDR_LOG));
 606                 addr_log2 = readb(card->csr_remap + ERROR_ADDR_LOG + 4);
 607
 608                 count = readb(card->csr_remap + ERROR_COUNT);
 609                 syndrome = readb(card->csr_remap + ERROR_SYNDROME);
 610                 check = readb(card->csr_remap + ERROR_CHECK);
 611
 612                 dump_dmastat(card, dma_status);
 613
 614                 if (stat & 0x01)
 615                         printk(KERN_ERR "MM%d*: Memory access error detected (err count %d)\n",
 616                                 card->card_number, count);
 617                 if (stat & 0x02)
 618                         printk(KERN_ERR "MM%d*: Multi-bit EDC error\n",
 619                                 card->card_number);
 620
 621                 printk(KERN_ERR "MM%d*: Fault Address 0x%02x%08x, Fault Data 0x%08x%08x\n",
 622                         card->card_number, addr_log2, addr_log1, data_log2, data_log1);
 623                 printk(KERN_ERR "MM%d*: Fault Check 0x%02x, Fault Syndrome 0x%02x\n",
 624                         card->card_number, check, syndrome);
 625
 626                 writeb(0, card->csr_remap + ERROR_COUNT);
 627         }
 628
 629         if (dma_status & DMASCR_PARITY_ERR_REP) {
 630                 printk(KERN_ERR "MM%d*: PARITY ERROR REPORTED\n", card->card_number);
 631                 pci_read_config_word(card->dev, PCI_STATUS, &cfg_status);
 632                 pci_write_config_word(card->dev, PCI_STATUS, cfg_status);
 633         }
 634
 635         if (dma_status & DMASCR_PARITY_ERR_DET) {
 636                 printk(KERN_ERR "MM%d*: PARITY ERROR DETECTED\n", card->card_number);
 637                 pci_read_config_word(card->dev, PCI_STATUS, &cfg_status);
 638                 pci_write_config_word(card->dev, PCI_STATUS, cfg_status);
 639         }
 640
 641         if (dma_status & DMASCR_SYSTEM_ERR_SIG) {
 642                 printk(KERN_ERR "MM%d*: SYSTEM ERROR\n", card->card_number);
 643                 pci_read_config_word(card->dev, PCI_STATUS, &cfg_status);
 644                 pci_write_config_word(card->dev, PCI_STATUS, cfg_status);
 645         }
 646
 647         if (dma_status & DMASCR_TARGET_ABT) {
 648                 printk(KERN_ERR "MM%d*: TARGET ABORT\n", card->card_number);
 649                 pci_read_config_word(card->dev, PCI_STATUS, &cfg_status);
 650                 pci_write_config_word(card->dev, PCI_STATUS, cfg_status);
 651         }
 652
 653         if (dma_status & DMASCR_MASTER_ABT) {
 654                 printk(KERN_ERR "MM%d*: MASTER ABORT\n", card->card_number);
 655                 pci_read_config_word(card->dev, PCI_STATUS, &cfg_status);
 656                 pci_write_config_word(card->dev, PCI_STATUS, cfg_status);
 657         }
 658
 659         /* and process the DMA descriptors */
 660         card->dma_status = dma_status;
 661         tasklet_schedule(&card->tasklet);
 662
 663 HW_TRACE(0x36);
 664
 665         return IRQ_HANDLED;
 666 }
 667 /*
 668 -----------------------------------------------------------------------------------
 669 --                         set_fault_to_battery_status
 670 -----------------------------------------------------------------------------------
 671 */
 672 /*
 673  * If both batteries are good, no LED
 674  * If either battery has been warned, solid LED
 675  * If both batteries are bad, flash the LED quickly
 676  * If either battery is bad, flash the LED semi quickly
 677  */
 678 static void set_fault_to_battery_status(struct cardinfo *card)
 679 {
 680         if (card->battery[0].good && card->battery[1].good)
 681                 set_led(card, LED_FAULT, LED_OFF);
 682         else if (card->battery[0].warned || card->battery[1].warned)
 683                 set_led(card, LED_FAULT, LED_ON);
 684         else if (!card->battery[0].good && !card->battery[1].good)
 685                 set_led(card, LED_FAULT, LED_FLASH_7_0);
 686         else
 687                 set_led(card, LED_FAULT, LED_FLASH_3_5);
 688 }
 689
 690 static void init_battery_timer(void);
 691
 692
 693 /*
 694 -----------------------------------------------------------------------------------
 695 --                            check_battery
 696 -----------------------------------------------------------------------------------
 697 */
 698 static int check_battery(struct cardinfo *card, int battery, int status)
 699 {
 700         if (status != card->battery[battery].good) {
 701                 card->battery[battery].good = !card->battery[battery].good;
 702                 card->battery[battery].last_change = jiffies;
 703
 704                 if (card->battery[battery].good) {
 705                         printk(KERN_ERR "MM%d: Battery %d now good\n",
 706                                 card->card_number, battery + 1);
 707                         card->battery[battery].warned = 0;
 708                 } else
 709                         printk(KERN_ERR "MM%d: Battery %d now FAILED\n",
 710                                 card->card_number, battery + 1);
 711
 712                 return 1;
 713         } else if (!card->battery[battery].good &&
 714                    !card->battery[battery].warned &&
 715                    time_after_eq(jiffies, card->battery[battery].last_change +
 716                                  (HZ * 60 * 60 * 5))) {
 717                 printk(KERN_ERR "MM%d: Battery %d still FAILED after 5 hours\n",
 718                         card->card_number, battery + 1);
 719                 card->battery[battery].warned = 1;
 720
 721                 return 1;
 722         }
 723
 724         return 0;
 725 }
 726 /*
 727 -----------------------------------------------------------------------------------
 728 --                              check_batteries
 729 -----------------------------------------------------------------------------------
 730 */
 731 static void check_batteries(struct cardinfo *card)
 732 {
 733         /* NOTE: this must *never* be called while the card
 734          * is doing (bus-to-card) DMA, or you will need the
 735          * reset switch
 736          */
 737         unsigned char status;
 738         int ret1, ret2;
 739
 740         status = readb(card->csr_remap + MEMCTRLSTATUS_BATTERY);
 741         if (debug & DEBUG_BATTERY_POLLING)
 742                 printk(KERN_DEBUG "MM%d: checking battery status, 1 = %s, 2 = %s\n",
 743                        card->card_number,
 744                        (status & BATTERY_1_FAILURE) ? "FAILURE" : "OK",
 745                        (status & BATTERY_2_FAILURE) ? "FAILURE" : "OK");
 746
 747         ret1 = check_battery(card, 0, !(status & BATTERY_1_FAILURE));
 748         ret2 = check_battery(card, 1, !(status & BATTERY_2_FAILURE));
 749
 750         if (ret1 || ret2)
 751                 set_fault_to_battery_status(card);
 752 }
 753
 754 static void check_all_batteries(unsigned long ptr)
 755 {
 756         int i;
 757
 758         for (i = 0; i < num_cards; i++)
 759                 if (!(cards[i].flags & UM_FLAG_NO_BATT)) {
 760                         struct cardinfo *card = &cards[i];
 761                         spin_lock_bh(&card->lock);
 762                         if (card->Active >= 0)
 763                                 card->check_batteries = 1;
 764                         else
 765                                 check_batteries(card);
 766                         spin_unlock_bh(&card->lock);
 767                 }
 768
 769         init_battery_timer();
 770 }
 771 /*
 772 -----------------------------------------------------------------------------------
 773 --                            init_battery_timer
 774 -----------------------------------------------------------------------------------
 775 */
 776 static void init_battery_timer(void)
 777 {
 778         init_timer(&battery_timer);
 779         battery_timer.function = check_all_batteries;
 780         battery_timer.expires = jiffies + (HZ * 60);
 781         add_timer(&battery_timer);
 782 }
 783 /*
 784 -----------------------------------------------------------------------------------
 785 --                              del_battery_timer
 786 -----------------------------------------------------------------------------------
 787 */
 788 static void del_battery_timer(void)
 789 {
 790         del_timer(&battery_timer);
 791 }
 792 /*
 793 -----------------------------------------------------------------------------------
 794 --                                mm_revalidate
 795 -----------------------------------------------------------------------------------
 796 */
 797 /*
 798  * Note no locks taken out here.  In a worst case scenario, we could drop
 799  * a chunk of system memory.  But that should never happen, since validation
 800  * happens at open or mount time, when locks are held.
 801  *
 802  *      That's crap, since doing that while some partitions are opened
 803  * or mounted will give you really nasty results.
 804  */
 805 static int mm_revalidate(struct gendisk *disk)
 806 {
 807         struct cardinfo *card = disk->private_data;
 808         set_capacity(disk, card->mm_size << 1);
 809         return 0;
 810 }
 811
 812 static int mm_getgeo(struct block_device *bdev, struct hd_geometry *geo)
 813 {
 814         struct cardinfo *card = bdev->bd_disk->private_data;
 815         int size = card->mm_size * (1024 / MM_HARDSECT);
 816
 817         /*
 818          * get geometry: we have to fake one...  trim the size to a
 819          * multiple of 2048 (1M): tell we have 32 sectors, 64 heads,
 820          * whatever cylinders.
 821          */
 822         geo->heads     = 64;
 823         geo->sectors   = 32;
 824         geo->cylinders = size / (geo->heads * geo->sectors);
 825         return 0;
 826 }
 827
 828 /*
 829 -----------------------------------------------------------------------------------
 830 --                                mm_check_change
 831 -----------------------------------------------------------------------------------
 832   Future support for removable devices
 833 */
 834 static int mm_check_change(struct gendisk *disk)
 835 {
 836 /*  struct cardinfo *dev = disk->private_data; */
 837         return 0;
 838 }
 839 /*
 840 -----------------------------------------------------------------------------------
 841 --                             mm_fops
 842 -----------------------------------------------------------------------------------
 843 */
 844 static struct block_device_operations mm_fops = {
 845         .owner          = THIS_MODULE,
 846         .getgeo         = mm_getgeo,
 847         .revalidate_disk= mm_revalidate,
 848         .media_changed  = mm_check_change,
 849 };
 850 /*
 851 -----------------------------------------------------------------------------------
 852 --                                mm_pci_probe
 853 -----------------------------------------------------------------------------------
 854 */
 855 static int __devinit mm_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 856 {
 857         int ret = -ENODEV;
 858         struct cardinfo *card = &cards[num_cards];
 859         unsigned char   mem_present;
 860         unsigned char   batt_status;
 861         unsigned int    saved_bar, data;
 862         int             magic_number;
 863
 864         if (pci_enable_device(dev) < 0)
 865                 return -ENODEV;
 866
 867         pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0xF8);
 868         pci_set_master(dev);
 869
 870         card->dev         = dev;
 871         card->card_number = num_cards;
 872
 873         card->csr_base = pci_resource_start(dev, 0);
 874         card->csr_len  = pci_resource_len(dev, 0);
 875 #ifdef CONFIG_MM_MAP_MEMORY
 876         card->mem_base = pci_resource_start(dev, 1);
 877         card->mem_len  = pci_resource_len(dev, 1);
 878 #endif
 879
 880         printk(KERN_INFO "Micro Memory(tm) controller #%d found at %02x:%02x (PCI Mem Module (Battery Backup))\n",
 881                card->card_number, dev->bus->number, dev->devfn);
 882
 883         if (pci_set_dma_mask(dev, DMA_64BIT_MASK) &&
 884             pci_set_dma_mask(dev, DMA_32BIT_MASK)) {
 885                 printk(KERN_WARNING "MM%d: NO suitable DMA found\n",num_cards);
 886                 return  -ENOMEM;
 887         }
 888         if (!request_mem_region(card->csr_base, card->csr_len, "Micro Memory")) {
 889                 printk(KERN_ERR "MM%d: Unable to request memory region\n", card->card_number);
 890                 ret = -ENOMEM;
 891
 892                 goto failed_req_csr;
 893         }
 894
 895         card->csr_remap = ioremap_nocache(card->csr_base, card->csr_len);
 896         if (!card->csr_remap) {
 897                 printk(KERN_ERR "MM%d: Unable to remap memory region\n", card->card_number);
 898                 ret = -ENOMEM;
 899
 900                 goto failed_remap_csr;
 901         }
 902
 903         printk(KERN_INFO "MM%d: CSR 0x%08lx -> 0x%p (0x%lx)\n", card->card_number,
 904                card->csr_base, card->csr_remap, card->csr_len);
 905
 906 #ifdef CONFIG_MM_MAP_MEMORY
 907         if (!request_mem_region(card->mem_base, card->mem_len, "Micro Memory")) {
 908                 printk(KERN_ERR "MM%d: Unable to request memory region\n", card->card_number);
 909                 ret = -ENOMEM;
 910
 911                 goto failed_req_mem;
 912         }
 913
 914         if (!(card->mem_remap = ioremap(card->mem_base, cards->mem_len))) {
 915                 printk(KERN_ERR "MM%d: Unable to remap memory region\n", card->card_number);
 916                 ret = -ENOMEM;
 917
 918                 goto failed_remap_mem;
 919         }
 920
 921         printk(KERN_INFO "MM%d: MEM 0x%8lx -> 0x%8lx (0x%lx)\n", card->card_number,
 922                card->mem_base, card->mem_remap, card->mem_len);
 923 #else
 924         printk(KERN_INFO "MM%d: MEM area not remapped (CONFIG_MM_MAP_MEMORY not set)\n",
 925                card->card_number);
 926 #endif
 927         switch(card->dev->device) {
 928         case 0x5415:
 929                 card->flags |= UM_FLAG_NO_BYTE_STATUS | UM_FLAG_NO_BATTREG;
 930                 magic_number = 0x59;
 931                 break;
 932
 933         case 0x5425:
 934                 card->flags |= UM_FLAG_NO_BYTE_STATUS;
 935                 magic_number = 0x5C;
 936                 break;
 937
 938         case 0x6155:
 939                 card->flags |= UM_FLAG_NO_BYTE_STATUS | UM_FLAG_NO_BATTREG | UM_FLAG_NO_BATT;
 940                 magic_number = 0x99;
 941                 break;
 942
 943         default:
 944                 magic_number = 0x100;
 945                 break;
 946         }
 947
 948         if (readb(card->csr_remap + MEMCTRLSTATUS_MAGIC) != magic_number) {
 949                 printk(KERN_ERR "MM%d: Magic number invalid\n", card->card_number);
 950                 ret = -ENOMEM;
 951                 goto failed_magic;
 952         }
 953
 954         card->mm_pages[0].desc = pci_alloc_consistent(card->dev,
 955                                                       PAGE_SIZE*2,
 956                                                       &card->mm_pages[0].page_dma);
 957         card->mm_pages[1].desc = pci_alloc_consistent(card->dev,
 958                                                       PAGE_SIZE*2,
 959                                                       &card->mm_pages[1].page_dma);
 960         if (card->mm_pages[0].desc == NULL ||
 961             card->mm_pages[1].desc == NULL) {
 962                 printk(KERN_ERR "MM%d: alloc failed\n", card->card_number);
 963                 goto failed_alloc;
 964         }
 965         reset_page(&card->mm_pages[0]);
 966         reset_page(&card->mm_pages[1]);
 967         card->Ready = 0;        /* page 0 is ready */
 968         card->Active = -1;      /* no page is active */
 969         card->bio = NULL;
 970         card->biotail = &card->bio;
 971
 972         card->queue = blk_alloc_queue(GFP_KERNEL);
 973         if (!card->queue)
 974                 goto failed_alloc;
 975
 976         blk_queue_make_request(card->queue, mm_make_request);
 977         card->queue->queuedata = card;
 978         card->queue->unplug_fn = mm_unplug_device;
 979
 980         tasklet_init(&card->tasklet, process_page, (unsigned long)card);
 981
 982         card->check_batteries = 0;
 983
 984         mem_present = readb(card->csr_remap + MEMCTRLSTATUS_MEMORY);
 985         switch (mem_present) {
 986         case MEM_128_MB:
 987                 card->mm_size = 1024 * 128;
 988                 break;
 989         case MEM_256_MB:
 990                 card->mm_size = 1024 * 256;
 991                 break;
 992         case MEM_512_MB:
 993                 card->mm_size = 1024 * 512;
 994                 break;
 995         case MEM_1_GB:
 996                 card->mm_size = 1024 * 1024;
 997                 break;
 998         case MEM_2_GB:
 999                 card->mm_size = 1024 * 2048;
1000                 break;
1001         default:
1002                 card->mm_size = 0;
1003                 break;
1004         }
1005
1006         /* Clear the LED's we control */
1007         set_led(card, LED_REMOVE, LED_OFF);
1008         set_led(card, LED_FAULT, LED_OFF);
1009
1010         batt_status = readb(card->csr_remap + MEMCTRLSTATUS_BATTERY);
1011
1012         card->battery[0].good = !(batt_status & BATTERY_1_FAILURE);
1013         card->battery[1].good = !(batt_status & BATTERY_2_FAILURE);
1014         card->battery[0].last_change = card->battery[1].last_change = jiffies;
1015
1016         if (card->flags & UM_FLAG_NO_BATT)
1017                 printk(KERN_INFO "MM%d: Size %d KB\n",
1018                        card->card_number, card->mm_size);
1019         else {
1020                 printk(KERN_INFO "MM%d: Size %d KB, Battery 1 %s (%s), Battery 2 %s (%s)\n",
1021                        card->card_number, card->mm_size,
1022                        (batt_status & BATTERY_1_DISABLED ? "Disabled" : "Enabled"),
1023                        card->battery[0].good ? "OK" : "FAILURE",
1024                        (batt_status & BATTERY_2_DISABLED ? "Disabled" : "Enabled"),
1025                        card->battery[1].good ? "OK" : "FAILURE");
1026
1027                 set_fault_to_battery_status(card);
1028         }
1029
1030         pci_read_config_dword(dev, PCI_BASE_ADDRESS_1, &saved_bar);
1031         data = 0xffffffff;
1032         pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, data);
1033         pci_read_config_dword(dev, PCI_BASE_ADDRESS_1, &data);
1034         pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, saved_bar);
1035         data &= 0xfffffff0;
1036         data = ~data;
1037         data += 1;
1038
1039         card->win_size = data;
1040
1041
1042         if (request_irq(dev->irq, mm_interrupt, IRQF_SHARED, "pci-umem", card)) {
1043                 printk(KERN_ERR "MM%d: Unable to allocate IRQ\n", card->card_number);
1044                 ret = -ENODEV;
1045
1046                 goto failed_req_irq;
1047         }
1048
1049         card->irq = dev->irq;
1050         printk(KERN_INFO "MM%d: Window size %d bytes, IRQ %d\n", card->card_number,
1051                card->win_size, card->irq);
1052
1053         spin_lock_init(&card->lock);
1054
1055         pci_set_drvdata(dev, card);
1056
1057         if (pci_write_cmd != 0x0F)      /* If not Memory Write & Invalidate */
1058                 pci_write_cmd = 0x07;   /* then Memory Write command */
1059
1060         if (pci_write_cmd & 0x08) { /* use Memory Write and Invalidate */
1061                 unsigned short cfg_command;
1062                 pci_read_config_word(dev, PCI_COMMAND, &cfg_command);
1063                 cfg_command |= 0x10; /* Memory Write & Invalidate Enable */
1064                 pci_write_config_word(dev, PCI_COMMAND, cfg_command);
1065         }
1066         pci_cmds = (pci_read_cmd << 28) | (pci_write_cmd << 24);
1067
1068         num_cards++;
1069
1070         if (!get_userbit(card, MEMORY_INITIALIZED)) {
1071                 printk(KERN_INFO "MM%d: memory NOT initialized. Consider over-writing whole device.\n", card->card_number);
1072                 card->init_size = 0;
1073         } else {
1074                 printk(KERN_INFO "MM%d: memory already initialized\n", card->card_number);
1075                 card->init_size = card->mm_size;
1076         }
1077
1078         /* Enable ECC */
1079         writeb(EDC_STORE_CORRECT, card->csr_remap + MEMCTRLCMD_ERRCTRL);
1080
1081         return 0;
1082
1083  failed_req_irq:
1084  failed_alloc:
1085         if (card->mm_pages[0].desc)
1086                 pci_free_consistent(card->dev, PAGE_SIZE*2,
1087                                     card->mm_pages[0].desc,
1088                                     card->mm_pages[0].page_dma);
1089         if (card->mm_pages[1].desc)
1090                 pci_free_consistent(card->dev, PAGE_SIZE*2,
1091                                     card->mm_pages[1].desc,
1092                                     card->mm_pages[1].page_dma);
1093  failed_magic:
1094 #ifdef CONFIG_MM_MAP_MEMORY
1095         iounmap(card->mem_remap);
1096  failed_remap_mem:
1097         release_mem_region(card->mem_base, card->mem_len);
1098  failed_req_mem:
1099 #endif
1100         iounmap(card->csr_remap);
1101  failed_remap_csr:
1102         release_mem_region(card->csr_base, card->csr_len);
1103  failed_req_csr:
1104
1105         return ret;
1106 }
1107 /*
1108 -----------------------------------------------------------------------------------
1109 --                              mm_pci_remove
1110 -----------------------------------------------------------------------------------
1111 */
1112 static void mm_pci_remove(struct pci_dev *dev)
1113 {
1114         struct cardinfo *card = pci_get_drvdata(dev);
1115
1116         tasklet_kill(&card->tasklet);
1117         iounmap(card->csr_remap);
1118         release_mem_region(card->csr_base, card->csr_len);
1119 #ifdef CONFIG_MM_MAP_MEMORY
1120         iounmap(card->mem_remap);
1121         release_mem_region(card->mem_base, card->mem_len);
1122 #endif
1123         free_irq(card->irq, card);
1124
1125         if (card->mm_pages[0].desc)
1126                 pci_free_consistent(card->dev, PAGE_SIZE*2,
1127                                     card->mm_pages[0].desc,
1128                                     card->mm_pages[0].page_dma);
1129         if (card->mm_pages[1].desc)
1130                 pci_free_consistent(card->dev, PAGE_SIZE*2,
1131                                     card->mm_pages[1].desc,
1132                                     card->mm_pages[1].page_dma);
1133         blk_cleanup_queue(card->queue);
1134 }
1135
1136 static const struct pci_device_id mm_pci_ids[] = { {
1137         .vendor =       PCI_VENDOR_ID_MICRO_MEMORY,
1138         .device =       PCI_DEVICE_ID_MICRO_MEMORY_5415CN,
1139         }, {
1140         .vendor =       PCI_VENDOR_ID_MICRO_MEMORY,
1141         .device =       PCI_DEVICE_ID_MICRO_MEMORY_5425CN,
1142         }, {
1143         .vendor =       PCI_VENDOR_ID_MICRO_MEMORY,
1144         .device =       PCI_DEVICE_ID_MICRO_MEMORY_6155,
1145         }, {
1146         .vendor =       0x8086,
1147         .device =       0xB555,
1148         .subvendor=     0x1332,
1149         .subdevice=     0x5460,
1150         .class  =       0x050000,
1151         .class_mask=    0,
1152         }, { /* end: all zeroes */ }
1153 };
1154
1155 MODULE_DEVICE_TABLE(pci, mm_pci_ids);
1156
1157 static struct pci_driver mm_pci_driver = {
1158         .name =         "umem",
1159         .id_table =     mm_pci_ids,
1160         .probe =        mm_pci_probe,
1161         .remove =       mm_pci_remove,
1162 };
1163 /*
1164 -----------------------------------------------------------------------------------
1165 --                               mm_init
1166 -----------------------------------------------------------------------------------
1167 */
1168
1169 static int __init mm_init(void)
1170 {
1171         int retval, i;
1172         int err;
1173
1174         printk(KERN_INFO DRIVER_VERSION " : " DRIVER_DESC "\n");
1175
1176         retval = pci_register_driver(&mm_pci_driver);
1177         if (retval)
1178                 return -ENOMEM;
1179
1180         err = major_nr = register_blkdev(0, "umem");
1181         if (err < 0) {
1182                 pci_unregister_driver(&mm_pci_driver);
1183                 return -EIO;
1184         }
1185
1186         for (i = 0; i < num_cards; i++) {
1187                 mm_gendisk[i] = alloc_disk(1 << MM_SHIFT);
1188                 if (!mm_gendisk[i])
1189                         goto out;
1190         }
1191
1192         for (i = 0; i < num_cards; i++) {
1193                 struct gendisk *disk = mm_gendisk[i];
1194                 sprintf(disk->disk_name, "umem%c", 'a'+i);
1195                 spin_lock_init(&cards[i].lock);
1196                 disk->major = major_nr;
1197                 disk->first_minor  = i << MM_SHIFT;
1198                 disk->fops = &mm_fops;
1199                 disk->private_data = &cards[i];
1200                 disk->queue = cards[i].queue;
1201                 set_capacity(disk, cards[i].mm_size << 1);
1202                 add_disk(disk);
1203         }
1204
1205         init_battery_timer();
1206         printk("MM: desc_per_page = %ld\n", DESC_PER_PAGE);
1207 /* printk("mm_init: Done. 10-19-01 9:00\n"); */
1208         return 0;
1209
1210 out:
1211         pci_unregister_driver(&mm_pci_driver);
1212         unregister_blkdev(major_nr, "umem");
1213         while (i--)
1214                 put_disk(mm_gendisk[i]);
1215         return -ENOMEM;
1216 }
1217 /*
1218 -----------------------------------------------------------------------------------
1219 --                             mm_cleanup
1220 -----------------------------------------------------------------------------------
1221 */
1222 static void __exit mm_cleanup(void)
1223 {
1224         int i;
1225
1226         del_battery_timer();
1227
1228         for (i=0; i < num_cards ; i++) {
1229                 del_gendisk(mm_gendisk[i]);
1230                 put_disk(mm_gendisk[i]);
1231         }
1232
1233         pci_unregister_driver(&mm_pci_driver);
1234
1235         unregister_blkdev(major_nr, "umem");
1236 }
1237
1238 module_init(mm_init);
1239 module_exit(mm_cleanup);
1240
1241 MODULE_AUTHOR(DRIVER_AUTHOR);
1242 MODULE_DESCRIPTION(DRIVER_DESC);
1243 MODULE_LICENSE("GPL");