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   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/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 #include <linux/dma-mapping.h>
  53
  54 #include <linux/fcntl.h>        /* O_ACCMODE */
  55 #include <linux/hdreg.h>  /* HDIO_GETGEO */
  56
  57 #include <linux/umem.h>
  58
  59 #include <asm/uaccess.h>
  60 #include <asm/io.h>
  61
  62 #define MM_MAXCARDS 4
  63 #define MM_RAHEAD 2      /* two sectors */
  64 #define MM_BLKSIZE 1024  /* 1k blocks */
  65 #define MM_HARDSECT 512  /* 512-byte hardware sectors */
  66 #define MM_SHIFT 6       /* max 64 partitions on 4 cards  */
  67
  68 /*
  69  * Version Information
  70  */
  71
  72 #define DRIVER_VERSION "v2.3"
  73 #define DRIVER_AUTHOR "San Mehat, Johannes Erdfelt, NeilBrown"
  74 #define DRIVER_DESC "Micro Memory(tm) PCI memory board block driver"
  75
  76 static int debug;
  77 /* #define HW_TRACE(x)     writeb(x,cards[0].csr_remap + MEMCTRLSTATUS_MAGIC) */
  78 #define HW_TRACE(x)
  79
  80 #define DEBUG_LED_ON_TRANSFER   0x01
  81 #define DEBUG_BATTERY_POLLING   0x02
  82
  83 module_param(debug, int, 0644);
  84 MODULE_PARM_DESC(debug, "Debug bitmask");
  85
  86 static int pci_read_cmd = 0x0C;         /* Read Multiple */
  87 module_param(pci_read_cmd, int, 0);
  88 MODULE_PARM_DESC(pci_read_cmd, "PCI read command");
  89
  90 static int pci_write_cmd = 0x0F;        /* Write and Invalidate */
  91 module_param(pci_write_cmd, int, 0);
  92 MODULE_PARM_DESC(pci_write_cmd, "PCI write command");
  93
  94 static int pci_cmds;
  95
  96 static int major_nr;
  97
  98 #include <linux/blkdev.h>
  99 #include <linux/blkpg.h>
 100
 101 struct cardinfo {
 102         int             card_number;
 103         struct pci_dev  *dev;
 104
 105         int             irq;
 106
 107         unsigned long   csr_base;
 108         unsigned char   __iomem *csr_remap;
 109         unsigned long   csr_len;
 110 #ifdef CONFIG_MM_MAP_MEMORY
 111         unsigned long   mem_base;
 112         unsigned char   __iomem *mem_remap;
 113         unsigned long   mem_len;
 114 #endif
 115
 116         unsigned int    win_size; /* PCI window size */
 117         unsigned int    mm_size;  /* size in kbytes */
 118
 119         unsigned int    init_size; /* initial segment, in sectors,
 120                                     * that we know to
 121                                     * have been written
 122                                     */
 123         struct bio      *bio, *currentbio, **biotail;
 124
 125         request_queue_t *queue;
 126
 127         struct mm_page {
 128                 dma_addr_t              page_dma;
 129                 struct mm_dma_desc      *desc;
 130                 int                     cnt, headcnt;
 131                 struct bio              *bio, **biotail;
 132         } mm_pages[2];
 133 #define DESC_PER_PAGE ((PAGE_SIZE*2)/sizeof(struct mm_dma_desc))
 134
 135         int  Active, Ready;
 136
 137         struct tasklet_struct   tasklet;
 138         unsigned int dma_status;
 139
 140         struct {
 141                 int             good;
 142                 int             warned;
 143                 unsigned long   last_change;
 144         } battery[2];
 145
 146         spinlock_t      lock;
 147         int             check_batteries;
 148
 149         int             flags;
 150 };
 151
 152 static struct cardinfo cards[MM_MAXCARDS];
 153 static struct block_device_operations mm_fops;
 154 static struct timer_list battery_timer;
 155
 156 static int num_cards = 0;
 157
 158 static struct gendisk *mm_gendisk[MM_MAXCARDS];
 159
 160 static void check_batteries(struct cardinfo *card);
 161
 162 /*
 163 -----------------------------------------------------------------------------------
 164 --                           get_userbit
 165 -----------------------------------------------------------------------------------
 166 */
 167 static int get_userbit(struct cardinfo *card, int bit)
 168 {
 169         unsigned char led;
 170
 171         led = readb(card->csr_remap + MEMCTRLCMD_LEDCTRL);
 172         return led & bit;
 173 }
 174 /*
 175 -----------------------------------------------------------------------------------
 176 --                            set_userbit
 177 -----------------------------------------------------------------------------------
 178 */
 179 static int set_userbit(struct cardinfo *card, int bit, unsigned char state)
 180 {
 181         unsigned char led;
 182
 183         led = readb(card->csr_remap + MEMCTRLCMD_LEDCTRL);
 184         if (state)
 185                 led |= bit;
 186         else
 187                 led &= ~bit;
 188         writeb(led, card->csr_remap + MEMCTRLCMD_LEDCTRL);
 189
 190         return 0;
 191 }
 192 /*
 193 -----------------------------------------------------------------------------------
 194 --                             set_led
 195 -----------------------------------------------------------------------------------
 196 */
 197 /*
 198  * NOTE: For the power LED, use the LED_POWER_* macros since they differ
 199  */
 200 static void set_led(struct cardinfo *card, int shift, unsigned char state)
 201 {
 202         unsigned char led;
 203
 204         led = readb(card->csr_remap + MEMCTRLCMD_LEDCTRL);
 205         if (state == LED_FLIP)
 206                 led ^= (1<<shift);
 207         else {
 208                 led &= ~(0x03 << shift);
 209                 led |= (state << shift);
 210         }
 211         writeb(led, card->csr_remap + MEMCTRLCMD_LEDCTRL);
 212
 213 }
 214
 215 #ifdef MM_DIAG
 216 /*
 217 -----------------------------------------------------------------------------------
 218 --                              dump_regs
 219 -----------------------------------------------------------------------------------
 220 */
 221 static void dump_regs(struct cardinfo *card)
 222 {
 223         unsigned char *p;
 224         int i, i1;
 225
 226         p = card->csr_remap;
 227         for (i = 0; i < 8; i++) {
 228                 printk(KERN_DEBUG "%p   ", p);
 229
 230                 for (i1 = 0; i1 < 16; i1++)
 231                         printk("%02x ", *p++);
 232
 233                 printk("\n");
 234         }
 235 }
 236 #endif
 237 /*
 238 -----------------------------------------------------------------------------------
 239 --                            dump_dmastat
 240 -----------------------------------------------------------------------------------
 241 */
 242 static void dump_dmastat(struct cardinfo *card, unsigned int dmastat)
 243 {
 244         printk(KERN_DEBUG "MM%d*: DMAstat - ", card->card_number);
 245         if (dmastat & DMASCR_ANY_ERR)
 246                 printk("ANY_ERR ");
 247         if (dmastat & DMASCR_MBE_ERR)
 248                 printk("MBE_ERR ");
 249         if (dmastat & DMASCR_PARITY_ERR_REP)
 250                 printk("PARITY_ERR_REP ");
 251         if (dmastat & DMASCR_PARITY_ERR_DET)
 252                 printk("PARITY_ERR_DET ");
 253         if (dmastat & DMASCR_SYSTEM_ERR_SIG)
 254                 printk("SYSTEM_ERR_SIG ");
 255         if (dmastat & DMASCR_TARGET_ABT)
 256                 printk("TARGET_ABT ");
 257         if (dmastat & DMASCR_MASTER_ABT)
 258                 printk("MASTER_ABT ");
 259         if (dmastat & DMASCR_CHAIN_COMPLETE)
 260                 printk("CHAIN_COMPLETE ");
 261         if (dmastat & DMASCR_DMA_COMPLETE)
 262                 printk("DMA_COMPLETE ");
 263         printk("\n");
 264 }
 265
 266 /*
 267  * Theory of request handling
 268  *
 269  * Each bio is assigned to one mm_dma_desc - which may not be enough FIXME
 270  * We have two pages of mm_dma_desc, holding about 64 descriptors
 271  * each.  These are allocated at init time.
 272  * One page is "Ready" and is either full, or can have request added.
 273  * The other page might be "Active", which DMA is happening on it.
 274  *
 275  * Whenever IO on the active page completes, the Ready page is activated
 276  * and the ex-Active page is clean out and made Ready.
 277  * Otherwise the Ready page is only activated when it becomes full, or
 278  * when mm_unplug_device is called via the unplug_io_fn.
 279  *
 280  * If a request arrives while both pages a full, it is queued, and b_rdev is
 281  * overloaded to record whether it was a read or a write.
 282  *
 283  * The interrupt handler only polls the device to clear the interrupt.
 284  * The processing of the result is done in a tasklet.
 285  */
 286
 287 static void mm_start_io(struct cardinfo *card)
 288 {
 289         /* we have the lock, we know there is
 290          * no IO active, and we know that card->Active
 291          * is set
 292          */
 293         struct mm_dma_desc *desc;
 294         struct mm_page *page;
 295         int offset;
 296
 297         /* make the last descriptor end the chain */
 298         page = &card->mm_pages[card->Active];
 299         pr_debug("start_io: %d %d->%d\n", card->Active, page->headcnt, page->cnt-1);
 300         desc = &page->desc[page->cnt-1];
 301
 302         desc->control_bits |= cpu_to_le32(DMASCR_CHAIN_COMP_EN);
 303         desc->control_bits &= ~cpu_to_le32(DMASCR_CHAIN_EN);
 304         desc->sem_control_bits = desc->control_bits;
 305
 306
 307         if (debug & DEBUG_LED_ON_TRANSFER)
 308                 set_led(card, LED_REMOVE, LED_ON);
 309
 310         desc = &page->desc[page->headcnt];
 311         writel(0, card->csr_remap + DMA_PCI_ADDR);
 312         writel(0, card->csr_remap + DMA_PCI_ADDR + 4);
 313
 314         writel(0, card->csr_remap + DMA_LOCAL_ADDR);
 315         writel(0, card->csr_remap + DMA_LOCAL_ADDR + 4);
 316
 317         writel(0, card->csr_remap + DMA_TRANSFER_SIZE);
 318         writel(0, card->csr_remap + DMA_TRANSFER_SIZE + 4);
 319
 320         writel(0, card->csr_remap + DMA_SEMAPHORE_ADDR);
 321         writel(0, card->csr_remap + DMA_SEMAPHORE_ADDR + 4);
 322
 323         offset = ((char*)desc) - ((char*)page->desc);
 324         writel(cpu_to_le32((page->page_dma+offset)&0xffffffff),
 325                card->csr_remap + DMA_DESCRIPTOR_ADDR);
 326         /* Force the value to u64 before shifting otherwise >> 32 is undefined C
 327          * and on some ports will do nothing ! */
 328         writel(cpu_to_le32(((u64)page->page_dma)>>32),
 329                card->csr_remap + DMA_DESCRIPTOR_ADDR + 4);
 330
 331         /* Go, go, go */
 332         writel(cpu_to_le32(DMASCR_GO | DMASCR_CHAIN_EN | pci_cmds),
 333                card->csr_remap + DMA_STATUS_CTRL);
 334 }
 335
 336 static int add_bio(struct cardinfo *card);
 337
 338 static void activate(struct cardinfo *card)
 339 {
 340         /* if No page is Active, and Ready is
 341          * not empty, then switch Ready page
 342          * to active and start IO.
 343          * Then add any bh's that are available to Ready
 344          */
 345
 346         do {
 347                 while (add_bio(card))
 348                         ;
 349
 350                 if (card->Active == -1 &&
 351                     card->mm_pages[card->Ready].cnt > 0) {
 352                         card->Active = card->Ready;
 353                         card->Ready = 1-card->Ready;
 354                         mm_start_io(card);
 355                 }
 356
 357         } while (card->Active == -1 && add_bio(card));
 358 }
 359
 360 static inline void reset_page(struct mm_page *page)
 361 {
 362         page->cnt = 0;
 363         page->headcnt = 0;
 364         page->bio = NULL;
 365         page->biotail = & page->bio;
 366 }
 367
 368 static void mm_unplug_device(request_queue_t *q)
 369 {
 370         struct cardinfo *card = q->queuedata;
 371         unsigned long flags;
 372
 373         spin_lock_irqsave(&card->lock, flags);
 374         if (blk_remove_plug(q))
 375                 activate(card);
 376         spin_unlock_irqrestore(&card->lock, flags);
 377 }
 378
 379 /*
 380  * If there is room on Ready page, take
 381  * one bh off list and add it.
 382  * return 1 if there was room, else 0.
 383  */
 384 static int add_bio(struct cardinfo *card)
 385 {
 386         struct mm_page *p;
 387         struct mm_dma_desc *desc;
 388         dma_addr_t dma_handle;
 389         int offset;
 390         struct bio *bio;
 391         int rw;
 392         int len;
 393
 394         bio = card->currentbio;
 395         if (!bio && card->bio) {
 396                 card->currentbio = card->bio;
 397                 card->bio = card->bio->bi_next;
 398                 if (card->bio == NULL)
 399                         card->biotail = &card->bio;
 400                 card->currentbio->bi_next = NULL;
 401                 return 1;
 402         }
 403         if (!bio)
 404                 return 0;
 405
 406         rw = bio_rw(bio);
 407         if (card->mm_pages[card->Ready].cnt >= DESC_PER_PAGE)
 408                 return 0;
 409
 410         len = bio_iovec(bio)->bv_len;
 411         dma_handle = pci_map_page(card->dev,
 412                                   bio_page(bio),
 413                                   bio_offset(bio),
 414                                   len,
 415                                   (rw==READ) ?
 416                                   PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE);
 417
 418         p = &card->mm_pages[card->Ready];
 419         desc = &p->desc[p->cnt];
 420         p->cnt++;
 421         if ((p->biotail) != &bio->bi_next) {
 422                 *(p->biotail) = bio;
 423                 p->biotail = &(bio->bi_next);
 424                 bio->bi_next = NULL;
 425         }
 426
 427         desc->data_dma_handle = dma_handle;
 428
 429         desc->pci_addr = cpu_to_le64((u64)desc->data_dma_handle);
 430         desc->local_addr= cpu_to_le64(bio->bi_sector << 9);
 431         desc->transfer_size = cpu_to_le32(len);
 432         offset = ( ((char*)&desc->sem_control_bits) - ((char*)p->desc));
 433         desc->sem_addr = cpu_to_le64((u64)(p->page_dma+offset));
 434         desc->zero1 = desc->zero2 = 0;
 435         offset = ( ((char*)(desc+1)) - ((char*)p->desc));
 436         desc->next_desc_addr = cpu_to_le64(p->page_dma+offset);
 437         desc->control_bits = cpu_to_le32(DMASCR_GO|DMASCR_ERR_INT_EN|
 438                                          DMASCR_PARITY_INT_EN|
 439                                          DMASCR_CHAIN_EN |
 440                                          DMASCR_SEM_EN |
 441                                          pci_cmds);
 442         if (rw == WRITE)
 443                 desc->control_bits |= cpu_to_le32(DMASCR_TRANSFER_READ);
 444         desc->sem_control_bits = desc->control_bits;
 445
 446         bio->bi_sector += (len>>9);
 447         bio->bi_size -= len;
 448         bio->bi_idx++;
 449         if (bio->bi_idx >= bio->bi_vcnt)
 450                 card->currentbio = NULL;
 451
 452         return 1;
 453 }
 454
 455 static void process_page(unsigned long data)
 456 {
 457         /* check if any of the requests in the page are DMA_COMPLETE,
 458          * and deal with them appropriately.
 459          * If we find a descriptor without DMA_COMPLETE in the semaphore, then
 460          * dma must have hit an error on that descriptor, so use dma_status instead
 461          * and assume that all following descriptors must be re-tried.
 462          */
 463         struct mm_page *page;
 464         struct bio *return_bio=NULL;
 465         struct cardinfo *card = (struct cardinfo *)data;
 466         unsigned int dma_status = card->dma_status;
 467
 468         spin_lock_bh(&card->lock);
 469         if (card->Active < 0)
 470                 goto out_unlock;
 471         page = &card->mm_pages[card->Active];
 472
 473         while (page->headcnt < page->cnt) {
 474                 struct bio *bio = page->bio;
 475                 struct mm_dma_desc *desc = &page->desc[page->headcnt];
 476                 int control = le32_to_cpu(desc->sem_control_bits);
 477                 int last=0;
 478                 int idx;
 479
 480                 if (!(control & DMASCR_DMA_COMPLETE)) {
 481                         control = dma_status;
 482                         last=1;
 483                 }
 484                 page->headcnt++;
 485                 idx = bio->bi_phys_segments;
 486                 bio->bi_phys_segments++;
 487                 if (bio->bi_phys_segments >= bio->bi_vcnt)
 488                         page->bio = bio->bi_next;
 489
 490                 pci_unmap_page(card->dev, desc->data_dma_handle,
 491                                bio_iovec_idx(bio,idx)->bv_len,
 492                                  (control& DMASCR_TRANSFER_READ) ?
 493                                 PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE);
 494                 if (control & DMASCR_HARD_ERROR) {
 495                         /* error */
 496                         clear_bit(BIO_UPTODATE, &bio->bi_flags);
 497                         printk(KERN_WARNING "MM%d: I/O error on sector %d/%d\n",
 498                                card->card_number,
 499                                le32_to_cpu(desc->local_addr)>>9,
 500                                le32_to_cpu(desc->transfer_size));
 501                         dump_dmastat(card, control);
 502                 } else if (test_bit(BIO_RW, &bio->bi_rw) &&
 503                            le32_to_cpu(desc->local_addr)>>9 == card->init_size) {
 504                         card->init_size += le32_to_cpu(desc->transfer_size)>>9;
 505                         if (card->init_size>>1 >= card->mm_size) {
 506                                 printk(KERN_INFO "MM%d: memory now initialised\n",
 507                                        card->card_number);
 508                                 set_userbit(card, MEMORY_INITIALIZED, 1);
 509                         }
 510                 }
 511                 if (bio != page->bio) {
 512                         bio->bi_next = return_bio;
 513                         return_bio = bio;
 514                 }
 515
 516                 if (last) break;
 517         }
 518
 519         if (debug & DEBUG_LED_ON_TRANSFER)
 520                 set_led(card, LED_REMOVE, LED_OFF);
 521
 522         if (card->check_batteries) {
 523                 card->check_batteries = 0;
 524                 check_batteries(card);
 525         }
 526         if (page->headcnt >= page->cnt) {
 527                 reset_page(page);
 528                 card->Active = -1;
 529                 activate(card);
 530         } else {
 531                 /* haven't finished with this one yet */
 532                 pr_debug("do some more\n");
 533                 mm_start_io(card);
 534         }
 535  out_unlock:
 536         spin_unlock_bh(&card->lock);
 537
 538         while(return_bio) {
 539                 struct bio *bio = return_bio;
 540
 541                 return_bio = bio->bi_next;
 542                 bio->bi_next = NULL;
 543                 bio_endio(bio, bio->bi_size, 0);
 544         }
 545 }
 546
 547 /*
 548 -----------------------------------------------------------------------------------
 549 --                              mm_make_request
 550 -----------------------------------------------------------------------------------
 551 */
 552 static int mm_make_request(request_queue_t *q, struct bio *bio)
 553 {
 554         struct cardinfo *card = q->queuedata;
 555         pr_debug("mm_make_request %ld %d\n", bh->b_rsector, bh->b_size);
 556
 557         bio->bi_phys_segments = bio->bi_idx; /* count of completed segments*/
 558         spin_lock_irq(&card->lock);
 559         *card->biotail = bio;
 560         bio->bi_next = NULL;
 561         card->biotail = &bio->bi_next;
 562         blk_plug_device(q);
 563         spin_unlock_irq(&card->lock);
 564
 565         return 0;
 566 }
 567
 568 /*
 569 -----------------------------------------------------------------------------------
 570 --                              mm_interrupt
 571 -----------------------------------------------------------------------------------
 572 */
 573 static irqreturn_t mm_interrupt(int irq, void *__card, struct pt_regs *regs)
 574 {
 575         struct cardinfo *card = (struct cardinfo *) __card;
 576         unsigned int dma_status;
 577         unsigned short cfg_status;
 578
 579 HW_TRACE(0x30);
 580
 581         dma_status = le32_to_cpu(readl(card->csr_remap + DMA_STATUS_CTRL));
 582
 583         if (!(dma_status & (DMASCR_ERROR_MASK | DMASCR_CHAIN_COMPLETE))) {
 584                 /* interrupt wasn't for me ... */
 585                 return IRQ_NONE;
 586         }
 587
 588         /* clear COMPLETION interrupts */
 589         if (card->flags & UM_FLAG_NO_BYTE_STATUS)
 590                 writel(cpu_to_le32(DMASCR_DMA_COMPLETE|DMASCR_CHAIN_COMPLETE),
 591                        card->csr_remap+ DMA_STATUS_CTRL);
 592         else
 593                 writeb((DMASCR_DMA_COMPLETE|DMASCR_CHAIN_COMPLETE) >> 16,
 594                        card->csr_remap+ DMA_STATUS_CTRL + 2);
 595
 596         /* log errors and clear interrupt status */
 597         if (dma_status & DMASCR_ANY_ERR) {
 598                 unsigned int    data_log1, data_log2;
 599                 unsigned int    addr_log1, addr_log2;
 600                 unsigned char   stat, count, syndrome, check;
 601
 602                 stat = readb(card->csr_remap + MEMCTRLCMD_ERRSTATUS);
 603
 604                 data_log1 = le32_to_cpu(readl(card->csr_remap + ERROR_DATA_LOG));
 605                 data_log2 = le32_to_cpu(readl(card->csr_remap + ERROR_DATA_LOG + 4));
 606                 addr_log1 = le32_to_cpu(readl(card->csr_remap + ERROR_ADDR_LOG));
 607                 addr_log2 = readb(card->csr_remap + ERROR_ADDR_LOG + 4);
 608
 609                 count = readb(card->csr_remap + ERROR_COUNT);
 610                 syndrome = readb(card->csr_remap + ERROR_SYNDROME);
 611                 check = readb(card->csr_remap + ERROR_CHECK);
 612
 613                 dump_dmastat(card, dma_status);
 614
 615                 if (stat & 0x01)
 616                         printk(KERN_ERR "MM%d*: Memory access error detected (err count %d)\n",
 617                                 card->card_number, count);
 618                 if (stat & 0x02)
 619                         printk(KERN_ERR "MM%d*: Multi-bit EDC error\n",
 620                                 card->card_number);
 621
 622                 printk(KERN_ERR "MM%d*: Fault Address 0x%02x%08x, Fault Data 0x%08x%08x\n",
 623                         card->card_number, addr_log2, addr_log1, data_log2, data_log1);
 624                 printk(KERN_ERR "MM%d*: Fault Check 0x%02x, Fault Syndrome 0x%02x\n",
 625                         card->card_number, check, syndrome);
 626
 627                 writeb(0, card->csr_remap + ERROR_COUNT);
 628         }
 629
 630         if (dma_status & DMASCR_PARITY_ERR_REP) {
 631                 printk(KERN_ERR "MM%d*: PARITY ERROR REPORTED\n", card->card_number);
 632                 pci_read_config_word(card->dev, PCI_STATUS, &cfg_status);
 633                 pci_write_config_word(card->dev, PCI_STATUS, cfg_status);
 634         }
 635
 636         if (dma_status & DMASCR_PARITY_ERR_DET) {
 637                 printk(KERN_ERR "MM%d*: PARITY ERROR DETECTED\n", card->card_number);
 638                 pci_read_config_word(card->dev, PCI_STATUS, &cfg_status);
 639                 pci_write_config_word(card->dev, PCI_STATUS, cfg_status);
 640         }
 641
 642         if (dma_status & DMASCR_SYSTEM_ERR_SIG) {
 643                 printk(KERN_ERR "MM%d*: SYSTEM ERROR\n", card->card_number);
 644                 pci_read_config_word(card->dev, PCI_STATUS, &cfg_status);
 645                 pci_write_config_word(card->dev, PCI_STATUS, cfg_status);
 646         }
 647
 648         if (dma_status & DMASCR_TARGET_ABT) {
 649                 printk(KERN_ERR "MM%d*: TARGET ABORT\n", card->card_number);
 650                 pci_read_config_word(card->dev, PCI_STATUS, &cfg_status);
 651                 pci_write_config_word(card->dev, PCI_STATUS, cfg_status);
 652         }
 653
 654         if (dma_status & DMASCR_MASTER_ABT) {
 655                 printk(KERN_ERR "MM%d*: MASTER ABORT\n", card->card_number);
 656                 pci_read_config_word(card->dev, PCI_STATUS, &cfg_status);
 657                 pci_write_config_word(card->dev, PCI_STATUS, cfg_status);
 658         }
 659
 660         /* and process the DMA descriptors */
 661         card->dma_status = dma_status;
 662         tasklet_schedule(&card->tasklet);
 663
 664 HW_TRACE(0x36);
 665
 666         return IRQ_HANDLED;
 667 }
 668 /*
 669 -----------------------------------------------------------------------------------
 670 --                         set_fault_to_battery_status
 671 -----------------------------------------------------------------------------------
 672 */
 673 /*
 674  * If both batteries are good, no LED
 675  * If either battery has been warned, solid LED
 676  * If both batteries are bad, flash the LED quickly
 677  * If either battery is bad, flash the LED semi quickly
 678  */
 679 static void set_fault_to_battery_status(struct cardinfo *card)
 680 {
 681         if (card->battery[0].good && card->battery[1].good)
 682                 set_led(card, LED_FAULT, LED_OFF);
 683         else if (card->battery[0].warned || card->battery[1].warned)
 684                 set_led(card, LED_FAULT, LED_ON);
 685         else if (!card->battery[0].good && !card->battery[1].good)
 686                 set_led(card, LED_FAULT, LED_FLASH_7_0);
 687         else
 688                 set_led(card, LED_FAULT, LED_FLASH_3_5);
 689 }
 690
 691 static void init_battery_timer(void);
 692
 693
 694 /*
 695 -----------------------------------------------------------------------------------
 696 --                            check_battery
 697 -----------------------------------------------------------------------------------
 698 */
 699 static int check_battery(struct cardinfo *card, int battery, int status)
 700 {
 701         if (status != card->battery[battery].good) {
 702                 card->battery[battery].good = !card->battery[battery].good;
 703                 card->battery[battery].last_change = jiffies;
 704
 705                 if (card->battery[battery].good) {
 706                         printk(KERN_ERR "MM%d: Battery %d now good\n",
 707                                 card->card_number, battery + 1);
 708                         card->battery[battery].warned = 0;
 709                 } else
 710                         printk(KERN_ERR "MM%d: Battery %d now FAILED\n",
 711                                 card->card_number, battery + 1);
 712
 713                 return 1;
 714         } else if (!card->battery[battery].good &&
 715                    !card->battery[battery].warned &&
 716                    time_after_eq(jiffies, card->battery[battery].last_change +
 717                                  (HZ * 60 * 60 * 5))) {
 718                 printk(KERN_ERR "MM%d: Battery %d still FAILED after 5 hours\n",
 719                         card->card_number, battery + 1);
 720                 card->battery[battery].warned = 1;
 721
 722                 return 1;
 723         }
 724
 725         return 0;
 726 }
 727 /*
 728 -----------------------------------------------------------------------------------
 729 --                              check_batteries
 730 -----------------------------------------------------------------------------------
 731 */
 732 static void check_batteries(struct cardinfo *card)
 733 {
 734         /* NOTE: this must *never* be called while the card
 735          * is doing (bus-to-card) DMA, or you will need the
 736          * reset switch
 737          */
 738         unsigned char status;
 739         int ret1, ret2;
 740
 741         status = readb(card->csr_remap + MEMCTRLSTATUS_BATTERY);
 742         if (debug & DEBUG_BATTERY_POLLING)
 743                 printk(KERN_DEBUG "MM%d: checking battery status, 1 = %s, 2 = %s\n",
 744                        card->card_number,
 745                        (status & BATTERY_1_FAILURE) ? "FAILURE" : "OK",
 746                        (status & BATTERY_2_FAILURE) ? "FAILURE" : "OK");
 747
 748         ret1 = check_battery(card, 0, !(status & BATTERY_1_FAILURE));
 749         ret2 = check_battery(card, 1, !(status & BATTERY_2_FAILURE));
 750
 751         if (ret1 || ret2)
 752                 set_fault_to_battery_status(card);
 753 }
 754
 755 static void check_all_batteries(unsigned long ptr)
 756 {
 757         int i;
 758
 759         for (i = 0; i < num_cards; i++)
 760                 if (!(cards[i].flags & UM_FLAG_NO_BATT)) {
 761                         struct cardinfo *card = &cards[i];
 762                         spin_lock_bh(&card->lock);
 763                         if (card->Active >= 0)
 764                                 card->check_batteries = 1;
 765                         else
 766                                 check_batteries(card);
 767                         spin_unlock_bh(&card->lock);
 768                 }
 769
 770         init_battery_timer();
 771 }
 772 /*
 773 -----------------------------------------------------------------------------------
 774 --                            init_battery_timer
 775 -----------------------------------------------------------------------------------
 776 */
 777 static void init_battery_timer(void)
 778 {
 779         init_timer(&battery_timer);
 780         battery_timer.function = check_all_batteries;
 781         battery_timer.expires = jiffies + (HZ * 60);
 782         add_timer(&battery_timer);
 783 }
 784 /*
 785 -----------------------------------------------------------------------------------
 786 --                              del_battery_timer
 787 -----------------------------------------------------------------------------------
 788 */
 789 static void del_battery_timer(void)
 790 {
 791         del_timer(&battery_timer);
 792 }
 793 /*
 794 -----------------------------------------------------------------------------------
 795 --                                mm_revalidate
 796 -----------------------------------------------------------------------------------
 797 */
 798 /*
 799  * Note no locks taken out here.  In a worst case scenario, we could drop
 800  * a chunk of system memory.  But that should never happen, since validation
 801  * happens at open or mount time, when locks are held.
 802  *
 803  *      That's crap, since doing that while some partitions are opened
 804  * or mounted will give you really nasty results.
 805  */
 806 static int mm_revalidate(struct gendisk *disk)
 807 {
 808         struct cardinfo *card = disk->private_data;
 809         set_capacity(disk, card->mm_size << 1);
 810         return 0;
 811 }
 812
 813 static int mm_getgeo(struct block_device *bdev, struct hd_geometry *geo)
 814 {
 815         struct cardinfo *card = bdev->bd_disk->private_data;
 816         int size = card->mm_size * (1024 / MM_HARDSECT);
 817
 818         /*
 819          * get geometry: we have to fake one...  trim the size to a
 820          * multiple of 2048 (1M): tell we have 32 sectors, 64 heads,
 821          * whatever cylinders.
 822          */
 823         geo->heads     = 64;
 824         geo->sectors   = 32;
 825         geo->cylinders = size / (geo->heads * geo->sectors);
 826         return 0;
 827 }
 828
 829 /*
 830 -----------------------------------------------------------------------------------
 831 --                                mm_check_change
 832 -----------------------------------------------------------------------------------
 833   Future support for removable devices
 834 */
 835 static int mm_check_change(struct gendisk *disk)
 836 {
 837 /*  struct cardinfo *dev = disk->private_data; */
 838         return 0;
 839 }
 840 /*
 841 -----------------------------------------------------------------------------------
 842 --                             mm_fops
 843 -----------------------------------------------------------------------------------
 844 */
 845 static struct block_device_operations mm_fops = {
 846         .owner          = THIS_MODULE,
 847         .getgeo         = mm_getgeo,
 848         .revalidate_disk= mm_revalidate,
 849         .media_changed  = mm_check_change,
 850 };
 851 /*
 852 -----------------------------------------------------------------------------------
 853 --                                mm_pci_probe
 854 -----------------------------------------------------------------------------------
 855 */
 856 static int __devinit mm_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 857 {
 858         int ret = -ENODEV;
 859         struct cardinfo *card = &cards[num_cards];
 860         unsigned char   mem_present;
 861         unsigned char   batt_status;
 862         unsigned int    saved_bar, data;
 863         int             magic_number;
 864
 865         if (pci_enable_device(dev) < 0)
 866                 return -ENODEV;
 867
 868         pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0xF8);
 869         pci_set_master(dev);
 870
 871         card->dev         = dev;
 872         card->card_number = num_cards;
 873
 874         card->csr_base = pci_resource_start(dev, 0);
 875         card->csr_len  = pci_resource_len(dev, 0);
 876 #ifdef CONFIG_MM_MAP_MEMORY
 877         card->mem_base = pci_resource_start(dev, 1);
 878         card->mem_len  = pci_resource_len(dev, 1);
 879 #endif
 880
 881         printk(KERN_INFO "Micro Memory(tm) controller #%d found at %02x:%02x (PCI Mem Module (Battery Backup))\n",
 882                card->card_number, dev->bus->number, dev->devfn);
 883
 884         if (pci_set_dma_mask(dev, DMA_64BIT_MASK) &&
 885             pci_set_dma_mask(dev, DMA_32BIT_MASK)) {
 886                 printk(KERN_WARNING "MM%d: NO suitable DMA found\n",num_cards);
 887                 return  -ENOMEM;
 888         }
 889         if (!request_mem_region(card->csr_base, card->csr_len, "Micro Memory")) {
 890                 printk(KERN_ERR "MM%d: Unable to request memory region\n", card->card_number);
 891                 ret = -ENOMEM;
 892
 893                 goto failed_req_csr;
 894         }
 895
 896         card->csr_remap = ioremap_nocache(card->csr_base, card->csr_len);
 897         if (!card->csr_remap) {
 898                 printk(KERN_ERR "MM%d: Unable to remap memory region\n", card->card_number);
 899                 ret = -ENOMEM;
 900
 901                 goto failed_remap_csr;
 902         }
 903
 904         printk(KERN_INFO "MM%d: CSR 0x%08lx -> 0x%p (0x%lx)\n", card->card_number,
 905                card->csr_base, card->csr_remap, card->csr_len);
 906
 907 #ifdef CONFIG_MM_MAP_MEMORY
 908         if (!request_mem_region(card->mem_base, card->mem_len, "Micro Memory")) {
 909                 printk(KERN_ERR "MM%d: Unable to request memory region\n", card->card_number);
 910                 ret = -ENOMEM;
 911
 912                 goto failed_req_mem;
 913         }
 914
 915         if (!(card->mem_remap = ioremap(card->mem_base, cards->mem_len))) {
 916                 printk(KERN_ERR "MM%d: Unable to remap memory region\n", card->card_number);
 917                 ret = -ENOMEM;
 918
 919                 goto failed_remap_mem;
 920         }
 921
 922         printk(KERN_INFO "MM%d: MEM 0x%8lx -> 0x%8lx (0x%lx)\n", card->card_number,
 923                card->mem_base, card->mem_remap, card->mem_len);
 924 #else
 925         printk(KERN_INFO "MM%d: MEM area not remapped (CONFIG_MM_MAP_MEMORY not set)\n",
 926                card->card_number);
 927 #endif
 928         switch(card->dev->device) {
 929         case 0x5415:
 930                 card->flags |= UM_FLAG_NO_BYTE_STATUS | UM_FLAG_NO_BATTREG;
 931                 magic_number = 0x59;
 932                 break;
 933
 934         case 0x5425:
 935                 card->flags |= UM_FLAG_NO_BYTE_STATUS;
 936                 magic_number = 0x5C;
 937                 break;
 938
 939         case 0x6155:
 940                 card->flags |= UM_FLAG_NO_BYTE_STATUS | UM_FLAG_NO_BATTREG | UM_FLAG_NO_BATT;
 941                 magic_number = 0x99;
 942                 break;
 943
 944         default:
 945                 magic_number = 0x100;
 946                 break;
 947         }
 948
 949         if (readb(card->csr_remap + MEMCTRLSTATUS_MAGIC) != magic_number) {
 950                 printk(KERN_ERR "MM%d: Magic number invalid\n", card->card_number);
 951                 ret = -ENOMEM;
 952                 goto failed_magic;
 953         }
 954
 955         card->mm_pages[0].desc = pci_alloc_consistent(card->dev,
 956                                                       PAGE_SIZE*2,
 957                                                       &card->mm_pages[0].page_dma);
 958         card->mm_pages[1].desc = pci_alloc_consistent(card->dev,
 959                                                       PAGE_SIZE*2,
 960                                                       &card->mm_pages[1].page_dma);
 961         if (card->mm_pages[0].desc == NULL ||
 962             card->mm_pages[1].desc == NULL) {
 963                 printk(KERN_ERR "MM%d: alloc failed\n", card->card_number);
 964                 goto failed_alloc;
 965         }
 966         reset_page(&card->mm_pages[0]);
 967         reset_page(&card->mm_pages[1]);
 968         card->Ready = 0;        /* page 0 is ready */
 969         card->Active = -1;      /* no page is active */
 970         card->bio = NULL;
 971         card->biotail = &card->bio;
 972
 973         card->queue = blk_alloc_queue(GFP_KERNEL);
 974         if (!card->queue)
 975                 goto failed_alloc;
 976
 977         blk_queue_make_request(card->queue, mm_make_request);
 978         card->queue->queuedata = card;
 979         card->queue->unplug_fn = mm_unplug_device;
 980
 981         tasklet_init(&card->tasklet, process_page, (unsigned long)card);
 982
 983         card->check_batteries = 0;
 984
 985         mem_present = readb(card->csr_remap + MEMCTRLSTATUS_MEMORY);
 986         switch (mem_present) {
 987         case MEM_128_MB:
 988                 card->mm_size = 1024 * 128;
 989                 break;
 990         case MEM_256_MB:
 991                 card->mm_size = 1024 * 256;
 992                 break;
 993         case MEM_512_MB:
 994                 card->mm_size = 1024 * 512;
 995                 break;
 996         case MEM_1_GB:
 997                 card->mm_size = 1024 * 1024;
 998                 break;
 999         case MEM_2_GB:
1000                 card->mm_size = 1024 * 2048;
1001                 break;
1002         default:
1003                 card->mm_size = 0;
1004                 break;
1005         }
1006
1007         /* Clear the LED's we control */
1008         set_led(card, LED_REMOVE, LED_OFF);
1009         set_led(card, LED_FAULT, LED_OFF);
1010
1011         batt_status = readb(card->csr_remap + MEMCTRLSTATUS_BATTERY);
1012
1013         card->battery[0].good = !(batt_status & BATTERY_1_FAILURE);
1014         card->battery[1].good = !(batt_status & BATTERY_2_FAILURE);
1015         card->battery[0].last_change = card->battery[1].last_change = jiffies;
1016
1017         if (card->flags & UM_FLAG_NO_BATT)
1018                 printk(KERN_INFO "MM%d: Size %d KB\n",
1019                        card->card_number, card->mm_size);
1020         else {
1021                 printk(KERN_INFO "MM%d: Size %d KB, Battery 1 %s (%s), Battery 2 %s (%s)\n",
1022                        card->card_number, card->mm_size,
1023                        (batt_status & BATTERY_1_DISABLED ? "Disabled" : "Enabled"),
1024                        card->battery[0].good ? "OK" : "FAILURE",
1025                        (batt_status & BATTERY_2_DISABLED ? "Disabled" : "Enabled"),
1026                        card->battery[1].good ? "OK" : "FAILURE");
1027
1028                 set_fault_to_battery_status(card);
1029         }
1030
1031         pci_read_config_dword(dev, PCI_BASE_ADDRESS_1, &saved_bar);
1032         data = 0xffffffff;
1033         pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, data);
1034         pci_read_config_dword(dev, PCI_BASE_ADDRESS_1, &data);
1035         pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, saved_bar);
1036         data &= 0xfffffff0;
1037         data = ~data;
1038         data += 1;
1039
1040         card->win_size = data;
1041
1042
1043         if (request_irq(dev->irq, mm_interrupt, IRQF_SHARED, "pci-umem", card)) {
1044                 printk(KERN_ERR "MM%d: Unable to allocate IRQ\n", card->card_number);
1045                 ret = -ENODEV;
1046
1047                 goto failed_req_irq;
1048         }
1049
1050         card->irq = dev->irq;
1051         printk(KERN_INFO "MM%d: Window size %d bytes, IRQ %d\n", card->card_number,
1052                card->win_size, card->irq);
1053
1054         spin_lock_init(&card->lock);
1055
1056         pci_set_drvdata(dev, card);
1057
1058         if (pci_write_cmd != 0x0F)      /* If not Memory Write & Invalidate */
1059                 pci_write_cmd = 0x07;   /* then Memory Write command */
1060
1061         if (pci_write_cmd & 0x08) { /* use Memory Write and Invalidate */
1062                 unsigned short cfg_command;
1063                 pci_read_config_word(dev, PCI_COMMAND, &cfg_command);
1064                 cfg_command |= 0x10; /* Memory Write & Invalidate Enable */
1065                 pci_write_config_word(dev, PCI_COMMAND, cfg_command);
1066         }
1067         pci_cmds = (pci_read_cmd << 28) | (pci_write_cmd << 24);
1068
1069         num_cards++;
1070
1071         if (!get_userbit(card, MEMORY_INITIALIZED)) {
1072                 printk(KERN_INFO "MM%d: memory NOT initialized. Consider over-writing whole device.\n", card->card_number);
1073                 card->init_size = 0;
1074         } else {
1075                 printk(KERN_INFO "MM%d: memory already initialized\n", card->card_number);
1076                 card->init_size = card->mm_size;
1077         }
1078
1079         /* Enable ECC */
1080         writeb(EDC_STORE_CORRECT, card->csr_remap + MEMCTRLCMD_ERRCTRL);
1081
1082         return 0;
1083
1084  failed_req_irq:
1085  failed_alloc:
1086         if (card->mm_pages[0].desc)
1087                 pci_free_consistent(card->dev, PAGE_SIZE*2,
1088                                     card->mm_pages[0].desc,
1089                                     card->mm_pages[0].page_dma);
1090         if (card->mm_pages[1].desc)
1091                 pci_free_consistent(card->dev, PAGE_SIZE*2,
1092                                     card->mm_pages[1].desc,
1093                                     card->mm_pages[1].page_dma);
1094  failed_magic:
1095 #ifdef CONFIG_MM_MAP_MEMORY
1096         iounmap(card->mem_remap);
1097  failed_remap_mem:
1098         release_mem_region(card->mem_base, card->mem_len);
1099  failed_req_mem:
1100 #endif
1101         iounmap(card->csr_remap);
1102  failed_remap_csr:
1103         release_mem_region(card->csr_base, card->csr_len);
1104  failed_req_csr:
1105
1106         return ret;
1107 }
1108 /*
1109 -----------------------------------------------------------------------------------
1110 --                              mm_pci_remove
1111 -----------------------------------------------------------------------------------
1112 */
1113 static void mm_pci_remove(struct pci_dev *dev)
1114 {
1115         struct cardinfo *card = pci_get_drvdata(dev);
1116
1117         tasklet_kill(&card->tasklet);
1118         iounmap(card->csr_remap);
1119         release_mem_region(card->csr_base, card->csr_len);
1120 #ifdef CONFIG_MM_MAP_MEMORY
1121         iounmap(card->mem_remap);
1122         release_mem_region(card->mem_base, card->mem_len);
1123 #endif
1124         free_irq(card->irq, card);
1125
1126         if (card->mm_pages[0].desc)
1127                 pci_free_consistent(card->dev, PAGE_SIZE*2,
1128                                     card->mm_pages[0].desc,
1129                                     card->mm_pages[0].page_dma);
1130         if (card->mm_pages[1].desc)
1131                 pci_free_consistent(card->dev, PAGE_SIZE*2,
1132                                     card->mm_pages[1].desc,
1133                                     card->mm_pages[1].page_dma);
1134         blk_cleanup_queue(card->queue);
1135 }
1136
1137 static const struct pci_device_id mm_pci_ids[] = { {
1138         .vendor =       PCI_VENDOR_ID_MICRO_MEMORY,
1139         .device =       PCI_DEVICE_ID_MICRO_MEMORY_5415CN,
1140         }, {
1141         .vendor =       PCI_VENDOR_ID_MICRO_MEMORY,
1142         .device =       PCI_DEVICE_ID_MICRO_MEMORY_5425CN,
1143         }, {
1144         .vendor =       PCI_VENDOR_ID_MICRO_MEMORY,
1145         .device =       PCI_DEVICE_ID_MICRO_MEMORY_6155,
1146         }, {
1147         .vendor =       0x8086,
1148         .device =       0xB555,
1149         .subvendor=     0x1332,
1150         .subdevice=     0x5460,
1151         .class  =       0x050000,
1152         .class_mask=    0,
1153         }, { /* end: all zeroes */ }
1154 };
1155
1156 MODULE_DEVICE_TABLE(pci, mm_pci_ids);
1157
1158 static struct pci_driver mm_pci_driver = {
1159         .name =         "umem",
1160         .id_table =     mm_pci_ids,
1161         .probe =        mm_pci_probe,
1162         .remove =       mm_pci_remove,
1163 };
1164 /*
1165 -----------------------------------------------------------------------------------
1166 --                               mm_init
1167 -----------------------------------------------------------------------------------
1168 */
1169
1170 static int __init mm_init(void)
1171 {
1172         int retval, i;
1173         int err;
1174
1175         printk(KERN_INFO DRIVER_VERSION " : " DRIVER_DESC "\n");
1176
1177         retval = pci_register_driver(&mm_pci_driver);
1178         if (retval)
1179                 return -ENOMEM;
1180
1181         err = major_nr = register_blkdev(0, "umem");
1182         if (err < 0)
1183                 return -EIO;
1184
1185         for (i = 0; i < num_cards; i++) {
1186                 mm_gendisk[i] = alloc_disk(1 << MM_SHIFT);
1187                 if (!mm_gendisk[i])
1188                         goto out;
1189         }
1190
1191         for (i = 0; i < num_cards; i++) {
1192                 struct gendisk *disk = mm_gendisk[i];
1193                 sprintf(disk->disk_name, "umem%c", 'a'+i);
1194                 spin_lock_init(&cards[i].lock);
1195                 disk->major = major_nr;
1196                 disk->first_minor  = i << MM_SHIFT;
1197                 disk->fops = &mm_fops;
1198                 disk->private_data = &cards[i];
1199                 disk->queue = cards[i].queue;
1200                 set_capacity(disk, cards[i].mm_size << 1);
1201                 add_disk(disk);
1202         }
1203
1204         init_battery_timer();
1205         printk("MM: desc_per_page = %ld\n", DESC_PER_PAGE);
1206 /* printk("mm_init: Done. 10-19-01 9:00\n"); */
1207         return 0;
1208
1209 out:
1210         unregister_blkdev(major_nr, "umem");
1211         while (i--)
1212                 put_disk(mm_gendisk[i]);
1213         return -ENOMEM;
1214 }
1215 /*
1216 -----------------------------------------------------------------------------------
1217 --                             mm_cleanup
1218 -----------------------------------------------------------------------------------
1219 */
1220 static void __exit mm_cleanup(void)
1221 {
1222         int i;
1223
1224         del_battery_timer();
1225
1226         for (i=0; i < num_cards ; i++) {
1227                 del_gendisk(mm_gendisk[i]);
1228                 put_disk(mm_gendisk[i]);
1229         }
1230
1231         pci_unregister_driver(&mm_pci_driver);
1232
1233         unregister_blkdev(major_nr, "umem");
1234 }
1235
1236 module_init(mm_init);
1237 module_exit(mm_cleanup);
1238
1239 MODULE_AUTHOR(DRIVER_AUTHOR);
1240 MODULE_DESCRIPTION(DRIVER_DESC);
1241 MODULE_LICENSE("GPL");