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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 %llu %u\n",
 556                  (unsigned long long)bio->bi_sector, bio->bi_size);
 557
 558         bio->bi_phys_segments = bio->bi_idx; /* count of completed segments*/
 559         spin_lock_irq(&card->lock);
 560         *card->biotail = bio;
 561         bio->bi_next = NULL;
 562         card->biotail = &bio->bi_next;
 563         blk_plug_device(q);
 564         spin_unlock_irq(&card->lock);
 565
 566         return 0;
 567 }
 568
 569 /*
 570 -----------------------------------------------------------------------------------
 571 --                              mm_interrupt
 572 -----------------------------------------------------------------------------------
 573 */
 574 static irqreturn_t mm_interrupt(int irq, void *__card)
 575 {
 576         struct cardinfo *card = (struct cardinfo *) __card;
 577         unsigned int dma_status;
 578         unsigned short cfg_status;
 579
 580 HW_TRACE(0x30);
 581
 582         dma_status = le32_to_cpu(readl(card->csr_remap + DMA_STATUS_CTRL));
 583
 584         if (!(dma_status & (DMASCR_ERROR_MASK | DMASCR_CHAIN_COMPLETE))) {
 585                 /* interrupt wasn't for me ... */
 586                 return IRQ_NONE;
 587         }
 588
 589         /* clear COMPLETION interrupts */
 590         if (card->flags & UM_FLAG_NO_BYTE_STATUS)
 591                 writel(cpu_to_le32(DMASCR_DMA_COMPLETE|DMASCR_CHAIN_COMPLETE),
 592                        card->csr_remap+ DMA_STATUS_CTRL);
 593         else
 594                 writeb((DMASCR_DMA_COMPLETE|DMASCR_CHAIN_COMPLETE) >> 16,
 595                        card->csr_remap+ DMA_STATUS_CTRL + 2);
 596
 597         /* log errors and clear interrupt status */
 598         if (dma_status & DMASCR_ANY_ERR) {
 599                 unsigned int    data_log1, data_log2;
 600                 unsigned int    addr_log1, addr_log2;
 601                 unsigned char   stat, count, syndrome, check;
 602
 603                 stat = readb(card->csr_remap + MEMCTRLCMD_ERRSTATUS);
 604
 605                 data_log1 = le32_to_cpu(readl(card->csr_remap + ERROR_DATA_LOG));
 606                 data_log2 = le32_to_cpu(readl(card->csr_remap + ERROR_DATA_LOG + 4));
 607                 addr_log1 = le32_to_cpu(readl(card->csr_remap + ERROR_ADDR_LOG));
 608                 addr_log2 = readb(card->csr_remap + ERROR_ADDR_LOG + 4);
 609
 610                 count = readb(card->csr_remap + ERROR_COUNT);
 611                 syndrome = readb(card->csr_remap + ERROR_SYNDROME);
 612                 check = readb(card->csr_remap + ERROR_CHECK);
 613
 614                 dump_dmastat(card, dma_status);
 615
 616                 if (stat & 0x01)
 617                         printk(KERN_ERR "MM%d*: Memory access error detected (err count %d)\n",
 618                                 card->card_number, count);
 619                 if (stat & 0x02)
 620                         printk(KERN_ERR "MM%d*: Multi-bit EDC error\n",
 621                                 card->card_number);
 622
 623                 printk(KERN_ERR "MM%d*: Fault Address 0x%02x%08x, Fault Data 0x%08x%08x\n",
 624                         card->card_number, addr_log2, addr_log1, data_log2, data_log1);
 625                 printk(KERN_ERR "MM%d*: Fault Check 0x%02x, Fault Syndrome 0x%02x\n",
 626                         card->card_number, check, syndrome);
 627
 628                 writeb(0, card->csr_remap + ERROR_COUNT);
 629         }
 630
 631         if (dma_status & DMASCR_PARITY_ERR_REP) {
 632                 printk(KERN_ERR "MM%d*: PARITY ERROR REPORTED\n", card->card_number);
 633                 pci_read_config_word(card->dev, PCI_STATUS, &cfg_status);
 634                 pci_write_config_word(card->dev, PCI_STATUS, cfg_status);
 635         }
 636
 637         if (dma_status & DMASCR_PARITY_ERR_DET) {
 638                 printk(KERN_ERR "MM%d*: PARITY ERROR DETECTED\n", card->card_number);
 639                 pci_read_config_word(card->dev, PCI_STATUS, &cfg_status);
 640                 pci_write_config_word(card->dev, PCI_STATUS, cfg_status);
 641         }
 642
 643         if (dma_status & DMASCR_SYSTEM_ERR_SIG) {
 644                 printk(KERN_ERR "MM%d*: SYSTEM ERROR\n", card->card_number);
 645                 pci_read_config_word(card->dev, PCI_STATUS, &cfg_status);
 646                 pci_write_config_word(card->dev, PCI_STATUS, cfg_status);
 647         }
 648
 649         if (dma_status & DMASCR_TARGET_ABT) {
 650                 printk(KERN_ERR "MM%d*: TARGET ABORT\n", card->card_number);
 651                 pci_read_config_word(card->dev, PCI_STATUS, &cfg_status);
 652                 pci_write_config_word(card->dev, PCI_STATUS, cfg_status);
 653         }
 654
 655         if (dma_status & DMASCR_MASTER_ABT) {
 656                 printk(KERN_ERR "MM%d*: MASTER ABORT\n", card->card_number);
 657                 pci_read_config_word(card->dev, PCI_STATUS, &cfg_status);
 658                 pci_write_config_word(card->dev, PCI_STATUS, cfg_status);
 659         }
 660
 661         /* and process the DMA descriptors */
 662         card->dma_status = dma_status;
 663         tasklet_schedule(&card->tasklet);
 664
 665 HW_TRACE(0x36);
 666
 667         return IRQ_HANDLED;
 668 }
 669 /*
 670 -----------------------------------------------------------------------------------
 671 --                         set_fault_to_battery_status
 672 -----------------------------------------------------------------------------------
 673 */
 674 /*
 675  * If both batteries are good, no LED
 676  * If either battery has been warned, solid LED
 677  * If both batteries are bad, flash the LED quickly
 678  * If either battery is bad, flash the LED semi quickly
 679  */
 680 static void set_fault_to_battery_status(struct cardinfo *card)
 681 {
 682         if (card->battery[0].good && card->battery[1].good)
 683                 set_led(card, LED_FAULT, LED_OFF);
 684         else if (card->battery[0].warned || card->battery[1].warned)
 685                 set_led(card, LED_FAULT, LED_ON);
 686         else if (!card->battery[0].good && !card->battery[1].good)
 687                 set_led(card, LED_FAULT, LED_FLASH_7_0);
 688         else
 689                 set_led(card, LED_FAULT, LED_FLASH_3_5);
 690 }
 691
 692 static void init_battery_timer(void);
 693
 694
 695 /*
 696 -----------------------------------------------------------------------------------
 697 --                            check_battery
 698 -----------------------------------------------------------------------------------
 699 */
 700 static int check_battery(struct cardinfo *card, int battery, int status)
 701 {
 702         if (status != card->battery[battery].good) {
 703                 card->battery[battery].good = !card->battery[battery].good;
 704                 card->battery[battery].last_change = jiffies;
 705
 706                 if (card->battery[battery].good) {
 707                         printk(KERN_ERR "MM%d: Battery %d now good\n",
 708                                 card->card_number, battery + 1);
 709                         card->battery[battery].warned = 0;
 710                 } else
 711                         printk(KERN_ERR "MM%d: Battery %d now FAILED\n",
 712                                 card->card_number, battery + 1);
 713
 714                 return 1;
 715         } else if (!card->battery[battery].good &&
 716                    !card->battery[battery].warned &&
 717                    time_after_eq(jiffies, card->battery[battery].last_change +
 718                                  (HZ * 60 * 60 * 5))) {
 719                 printk(KERN_ERR "MM%d: Battery %d still FAILED after 5 hours\n",
 720                         card->card_number, battery + 1);
 721                 card->battery[battery].warned = 1;
 722
 723                 return 1;
 724         }
 725
 726         return 0;
 727 }
 728 /*
 729 -----------------------------------------------------------------------------------
 730 --                              check_batteries
 731 -----------------------------------------------------------------------------------
 732 */
 733 static void check_batteries(struct cardinfo *card)
 734 {
 735         /* NOTE: this must *never* be called while the card
 736          * is doing (bus-to-card) DMA, or you will need the
 737          * reset switch
 738          */
 739         unsigned char status;
 740         int ret1, ret2;
 741
 742         status = readb(card->csr_remap + MEMCTRLSTATUS_BATTERY);
 743         if (debug & DEBUG_BATTERY_POLLING)
 744                 printk(KERN_DEBUG "MM%d: checking battery status, 1 = %s, 2 = %s\n",
 745                        card->card_number,
 746                        (status & BATTERY_1_FAILURE) ? "FAILURE" : "OK",
 747                        (status & BATTERY_2_FAILURE) ? "FAILURE" : "OK");
 748
 749         ret1 = check_battery(card, 0, !(status & BATTERY_1_FAILURE));
 750         ret2 = check_battery(card, 1, !(status & BATTERY_2_FAILURE));
 751
 752         if (ret1 || ret2)
 753                 set_fault_to_battery_status(card);
 754 }
 755
 756 static void check_all_batteries(unsigned long ptr)
 757 {
 758         int i;
 759
 760         for (i = 0; i < num_cards; i++)
 761                 if (!(cards[i].flags & UM_FLAG_NO_BATT)) {
 762                         struct cardinfo *card = &cards[i];
 763                         spin_lock_bh(&card->lock);
 764                         if (card->Active >= 0)
 765                                 card->check_batteries = 1;
 766                         else
 767                                 check_batteries(card);
 768                         spin_unlock_bh(&card->lock);
 769                 }
 770
 771         init_battery_timer();
 772 }
 773 /*
 774 -----------------------------------------------------------------------------------
 775 --                            init_battery_timer
 776 -----------------------------------------------------------------------------------
 777 */
 778 static void init_battery_timer(void)
 779 {
 780         init_timer(&battery_timer);
 781         battery_timer.function = check_all_batteries;
 782         battery_timer.expires = jiffies + (HZ * 60);
 783         add_timer(&battery_timer);
 784 }
 785 /*
 786 -----------------------------------------------------------------------------------
 787 --                              del_battery_timer
 788 -----------------------------------------------------------------------------------
 789 */
 790 static void del_battery_timer(void)
 791 {
 792         del_timer(&battery_timer);
 793 }
 794 /*
 795 -----------------------------------------------------------------------------------
 796 --                                mm_revalidate
 797 -----------------------------------------------------------------------------------
 798 */
 799 /*
 800  * Note no locks taken out here.  In a worst case scenario, we could drop
 801  * a chunk of system memory.  But that should never happen, since validation
 802  * happens at open or mount time, when locks are held.
 803  *
 804  *      That's crap, since doing that while some partitions are opened
 805  * or mounted will give you really nasty results.
 806  */
 807 static int mm_revalidate(struct gendisk *disk)
 808 {
 809         struct cardinfo *card = disk->private_data;
 810         set_capacity(disk, card->mm_size << 1);
 811         return 0;
 812 }
 813
 814 static int mm_getgeo(struct block_device *bdev, struct hd_geometry *geo)
 815 {
 816         struct cardinfo *card = bdev->bd_disk->private_data;
 817         int size = card->mm_size * (1024 / MM_HARDSECT);
 818
 819         /*
 820          * get geometry: we have to fake one...  trim the size to a
 821          * multiple of 2048 (1M): tell we have 32 sectors, 64 heads,
 822          * whatever cylinders.
 823          */
 824         geo->heads     = 64;
 825         geo->sectors   = 32;
 826         geo->cylinders = size / (geo->heads * geo->sectors);
 827         return 0;
 828 }
 829
 830 /*
 831 -----------------------------------------------------------------------------------
 832 --                                mm_check_change
 833 -----------------------------------------------------------------------------------
 834   Future support for removable devices
 835 */
 836 static int mm_check_change(struct gendisk *disk)
 837 {
 838 /*  struct cardinfo *dev = disk->private_data; */
 839         return 0;
 840 }
 841 /*
 842 -----------------------------------------------------------------------------------
 843 --                             mm_fops
 844 -----------------------------------------------------------------------------------
 845 */
 846 static struct block_device_operations mm_fops = {
 847         .owner          = THIS_MODULE,
 848         .getgeo         = mm_getgeo,
 849         .revalidate_disk= mm_revalidate,
 850         .media_changed  = mm_check_change,
 851 };
 852 /*
 853 -----------------------------------------------------------------------------------
 854 --                                mm_pci_probe
 855 -----------------------------------------------------------------------------------
 856 */
 857 static int __devinit mm_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
 858 {
 859         int ret = -ENODEV;
 860         struct cardinfo *card = &cards[num_cards];
 861         unsigned char   mem_present;
 862         unsigned char   batt_status;
 863         unsigned int    saved_bar, data;
 864         int             magic_number;
 865
 866         if (pci_enable_device(dev) < 0)
 867                 return -ENODEV;
 868
 869         pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0xF8);
 870         pci_set_master(dev);
 871
 872         card->dev         = dev;
 873         card->card_number = num_cards;
 874
 875         card->csr_base = pci_resource_start(dev, 0);
 876         card->csr_len  = pci_resource_len(dev, 0);
 877 #ifdef CONFIG_MM_MAP_MEMORY
 878         card->mem_base = pci_resource_start(dev, 1);
 879         card->mem_len  = pci_resource_len(dev, 1);
 880 #endif
 881
 882         printk(KERN_INFO "Micro Memory(tm) controller #%d found at %02x:%02x (PCI Mem Module (Battery Backup))\n",
 883                card->card_number, dev->bus->number, dev->devfn);
 884
 885         if (pci_set_dma_mask(dev, DMA_64BIT_MASK) &&
 886             pci_set_dma_mask(dev, DMA_32BIT_MASK)) {
 887                 printk(KERN_WARNING "MM%d: NO suitable DMA found\n",num_cards);
 888                 return  -ENOMEM;
 889         }
 890         if (!request_mem_region(card->csr_base, card->csr_len, "Micro Memory")) {
 891                 printk(KERN_ERR "MM%d: Unable to request memory region\n", card->card_number);
 892                 ret = -ENOMEM;
 893
 894                 goto failed_req_csr;
 895         }
 896
 897         card->csr_remap = ioremap_nocache(card->csr_base, card->csr_len);
 898         if (!card->csr_remap) {
 899                 printk(KERN_ERR "MM%d: Unable to remap memory region\n", card->card_number);
 900                 ret = -ENOMEM;
 901
 902                 goto failed_remap_csr;
 903         }
 904
 905         printk(KERN_INFO "MM%d: CSR 0x%08lx -> 0x%p (0x%lx)\n", card->card_number,
 906                card->csr_base, card->csr_remap, card->csr_len);
 907
 908 #ifdef CONFIG_MM_MAP_MEMORY
 909         if (!request_mem_region(card->mem_base, card->mem_len, "Micro Memory")) {
 910                 printk(KERN_ERR "MM%d: Unable to request memory region\n", card->card_number);
 911                 ret = -ENOMEM;
 912
 913                 goto failed_req_mem;
 914         }
 915
 916         if (!(card->mem_remap = ioremap(card->mem_base, cards->mem_len))) {
 917                 printk(KERN_ERR "MM%d: Unable to remap memory region\n", card->card_number);
 918                 ret = -ENOMEM;
 919
 920                 goto failed_remap_mem;
 921         }
 922
 923         printk(KERN_INFO "MM%d: MEM 0x%8lx -> 0x%8lx (0x%lx)\n", card->card_number,
 924                card->mem_base, card->mem_remap, card->mem_len);
 925 #else
 926         printk(KERN_INFO "MM%d: MEM area not remapped (CONFIG_MM_MAP_MEMORY not set)\n",
 927                card->card_number);
 928 #endif
 929         switch(card->dev->device) {
 930         case 0x5415:
 931                 card->flags |= UM_FLAG_NO_BYTE_STATUS | UM_FLAG_NO_BATTREG;
 932                 magic_number = 0x59;
 933                 break;
 934
 935         case 0x5425:
 936                 card->flags |= UM_FLAG_NO_BYTE_STATUS;
 937                 magic_number = 0x5C;
 938                 break;
 939
 940         case 0x6155:
 941                 card->flags |= UM_FLAG_NO_BYTE_STATUS | UM_FLAG_NO_BATTREG | UM_FLAG_NO_BATT;
 942                 magic_number = 0x99;
 943                 break;
 944
 945         default:
 946                 magic_number = 0x100;
 947                 break;
 948         }
 949
 950         if (readb(card->csr_remap + MEMCTRLSTATUS_MAGIC) != magic_number) {
 951                 printk(KERN_ERR "MM%d: Magic number invalid\n", card->card_number);
 952                 ret = -ENOMEM;
 953                 goto failed_magic;
 954         }
 955
 956         card->mm_pages[0].desc = pci_alloc_consistent(card->dev,
 957                                                       PAGE_SIZE*2,
 958                                                       &card->mm_pages[0].page_dma);
 959         card->mm_pages[1].desc = pci_alloc_consistent(card->dev,
 960                                                       PAGE_SIZE*2,
 961                                                       &card->mm_pages[1].page_dma);
 962         if (card->mm_pages[0].desc == NULL ||
 963             card->mm_pages[1].desc == NULL) {
 964                 printk(KERN_ERR "MM%d: alloc failed\n", card->card_number);
 965                 goto failed_alloc;
 966         }
 967         reset_page(&card->mm_pages[0]);
 968         reset_page(&card->mm_pages[1]);
 969         card->Ready = 0;        /* page 0 is ready */
 970         card->Active = -1;      /* no page is active */
 971         card->bio = NULL;
 972         card->biotail = &card->bio;
 973
 974         card->queue = blk_alloc_queue(GFP_KERNEL);
 975         if (!card->queue)
 976                 goto failed_alloc;
 977
 978         blk_queue_make_request(card->queue, mm_make_request);
 979         card->queue->queuedata = card;
 980         card->queue->unplug_fn = mm_unplug_device;
 981
 982         tasklet_init(&card->tasklet, process_page, (unsigned long)card);
 983
 984         card->check_batteries = 0;
 985
 986         mem_present = readb(card->csr_remap + MEMCTRLSTATUS_MEMORY);
 987         switch (mem_present) {
 988         case MEM_128_MB:
 989                 card->mm_size = 1024 * 128;
 990                 break;
 991         case MEM_256_MB:
 992                 card->mm_size = 1024 * 256;
 993                 break;
 994         case MEM_512_MB:
 995                 card->mm_size = 1024 * 512;
 996                 break;
 997         case MEM_1_GB:
 998                 card->mm_size = 1024 * 1024;
 999                 break;
1000         case MEM_2_GB:
1001                 card->mm_size = 1024 * 2048;
1002                 break;
1003         default:
1004                 card->mm_size = 0;
1005                 break;
1006         }
1007
1008         /* Clear the LED's we control */
1009         set_led(card, LED_REMOVE, LED_OFF);
1010         set_led(card, LED_FAULT, LED_OFF);
1011
1012         batt_status = readb(card->csr_remap + MEMCTRLSTATUS_BATTERY);
1013
1014         card->battery[0].good = !(batt_status & BATTERY_1_FAILURE);
1015         card->battery[1].good = !(batt_status & BATTERY_2_FAILURE);
1016         card->battery[0].last_change = card->battery[1].last_change = jiffies;
1017
1018         if (card->flags & UM_FLAG_NO_BATT)
1019                 printk(KERN_INFO "MM%d: Size %d KB\n",
1020                        card->card_number, card->mm_size);
1021         else {
1022                 printk(KERN_INFO "MM%d: Size %d KB, Battery 1 %s (%s), Battery 2 %s (%s)\n",
1023                        card->card_number, card->mm_size,
1024                        (batt_status & BATTERY_1_DISABLED ? "Disabled" : "Enabled"),
1025                        card->battery[0].good ? "OK" : "FAILURE",
1026                        (batt_status & BATTERY_2_DISABLED ? "Disabled" : "Enabled"),
1027                        card->battery[1].good ? "OK" : "FAILURE");
1028
1029                 set_fault_to_battery_status(card);
1030         }
1031
1032         pci_read_config_dword(dev, PCI_BASE_ADDRESS_1, &saved_bar);
1033         data = 0xffffffff;
1034         pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, data);
1035         pci_read_config_dword(dev, PCI_BASE_ADDRESS_1, &data);
1036         pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, saved_bar);
1037         data &= 0xfffffff0;
1038         data = ~data;
1039         data += 1;
1040
1041         card->win_size = data;
1042
1043
1044         if (request_irq(dev->irq, mm_interrupt, IRQF_SHARED, "pci-umem", card)) {
1045                 printk(KERN_ERR "MM%d: Unable to allocate IRQ\n", card->card_number);
1046                 ret = -ENODEV;
1047
1048                 goto failed_req_irq;
1049         }
1050
1051         card->irq = dev->irq;
1052         printk(KERN_INFO "MM%d: Window size %d bytes, IRQ %d\n", card->card_number,
1053                card->win_size, card->irq);
1054
1055         spin_lock_init(&card->lock);
1056
1057         pci_set_drvdata(dev, card);
1058
1059         if (pci_write_cmd != 0x0F)      /* If not Memory Write & Invalidate */
1060                 pci_write_cmd = 0x07;   /* then Memory Write command */
1061
1062         if (pci_write_cmd & 0x08) { /* use Memory Write and Invalidate */
1063                 unsigned short cfg_command;
1064                 pci_read_config_word(dev, PCI_COMMAND, &cfg_command);
1065                 cfg_command |= 0x10; /* Memory Write & Invalidate Enable */
1066                 pci_write_config_word(dev, PCI_COMMAND, cfg_command);
1067         }
1068         pci_cmds = (pci_read_cmd << 28) | (pci_write_cmd << 24);
1069
1070         num_cards++;
1071
1072         if (!get_userbit(card, MEMORY_INITIALIZED)) {
1073                 printk(KERN_INFO "MM%d: memory NOT initialized. Consider over-writing whole device.\n", card->card_number);
1074                 card->init_size = 0;
1075         } else {
1076                 printk(KERN_INFO "MM%d: memory already initialized\n", card->card_number);
1077                 card->init_size = card->mm_size;
1078         }
1079
1080         /* Enable ECC */
1081         writeb(EDC_STORE_CORRECT, card->csr_remap + MEMCTRLCMD_ERRCTRL);
1082
1083         return 0;
1084
1085  failed_req_irq:
1086  failed_alloc:
1087         if (card->mm_pages[0].desc)
1088                 pci_free_consistent(card->dev, PAGE_SIZE*2,
1089                                     card->mm_pages[0].desc,
1090                                     card->mm_pages[0].page_dma);
1091         if (card->mm_pages[1].desc)
1092                 pci_free_consistent(card->dev, PAGE_SIZE*2,
1093                                     card->mm_pages[1].desc,
1094                                     card->mm_pages[1].page_dma);
1095  failed_magic:
1096 #ifdef CONFIG_MM_MAP_MEMORY
1097         iounmap(card->mem_remap);
1098  failed_remap_mem:
1099         release_mem_region(card->mem_base, card->mem_len);
1100  failed_req_mem:
1101 #endif
1102         iounmap(card->csr_remap);
1103  failed_remap_csr:
1104         release_mem_region(card->csr_base, card->csr_len);
1105  failed_req_csr:
1106
1107         return ret;
1108 }
1109 /*
1110 -----------------------------------------------------------------------------------
1111 --                              mm_pci_remove
1112 -----------------------------------------------------------------------------------
1113 */
1114 static void mm_pci_remove(struct pci_dev *dev)
1115 {
1116         struct cardinfo *card = pci_get_drvdata(dev);
1117
1118         tasklet_kill(&card->tasklet);
1119         iounmap(card->csr_remap);
1120         release_mem_region(card->csr_base, card->csr_len);
1121 #ifdef CONFIG_MM_MAP_MEMORY
1122         iounmap(card->mem_remap);
1123         release_mem_region(card->mem_base, card->mem_len);
1124 #endif
1125         free_irq(card->irq, card);
1126
1127         if (card->mm_pages[0].desc)
1128                 pci_free_consistent(card->dev, PAGE_SIZE*2,
1129                                     card->mm_pages[0].desc,
1130                                     card->mm_pages[0].page_dma);
1131         if (card->mm_pages[1].desc)
1132                 pci_free_consistent(card->dev, PAGE_SIZE*2,
1133                                     card->mm_pages[1].desc,
1134                                     card->mm_pages[1].page_dma);
1135         blk_cleanup_queue(card->queue);
1136 }
1137
1138 static const struct pci_device_id mm_pci_ids[] = { {
1139         .vendor =       PCI_VENDOR_ID_MICRO_MEMORY,
1140         .device =       PCI_DEVICE_ID_MICRO_MEMORY_5415CN,
1141         }, {
1142         .vendor =       PCI_VENDOR_ID_MICRO_MEMORY,
1143         .device =       PCI_DEVICE_ID_MICRO_MEMORY_5425CN,
1144         }, {
1145         .vendor =       PCI_VENDOR_ID_MICRO_MEMORY,
1146         .device =       PCI_DEVICE_ID_MICRO_MEMORY_6155,
1147         }, {
1148         .vendor =       0x8086,
1149         .device =       0xB555,
1150         .subvendor=     0x1332,
1151         .subdevice=     0x5460,
1152         .class  =       0x050000,
1153         .class_mask=    0,
1154         }, { /* end: all zeroes */ }
1155 };
1156
1157 MODULE_DEVICE_TABLE(pci, mm_pci_ids);
1158
1159 static struct pci_driver mm_pci_driver = {
1160         .name =         "umem",
1161         .id_table =     mm_pci_ids,
1162         .probe =        mm_pci_probe,
1163         .remove =       mm_pci_remove,
1164 };
1165 /*
1166 -----------------------------------------------------------------------------------
1167 --                               mm_init
1168 -----------------------------------------------------------------------------------
1169 */
1170
1171 static int __init mm_init(void)
1172 {
1173         int retval, i;
1174         int err;
1175
1176         printk(KERN_INFO DRIVER_VERSION " : " DRIVER_DESC "\n");
1177
1178         retval = pci_register_driver(&mm_pci_driver);
1179         if (retval)
1180                 return -ENOMEM;
1181
1182         err = major_nr = register_blkdev(0, "umem");
1183         if (err < 0)
1184                 return -EIO;
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         unregister_blkdev(major_nr, "umem");
1212         while (i--)
1213                 put_disk(mm_gendisk[i]);
1214         return -ENOMEM;
1215 }
1216 /*
1217 -----------------------------------------------------------------------------------
1218 --                             mm_cleanup
1219 -----------------------------------------------------------------------------------
1220 */
1221 static void __exit mm_cleanup(void)
1222 {
1223         int i;
1224
1225         del_battery_timer();
1226
1227         for (i=0; i < num_cards ; i++) {
1228                 del_gendisk(mm_gendisk[i]);
1229                 put_disk(mm_gendisk[i]);
1230         }
1231
1232         pci_unregister_driver(&mm_pci_driver);
1233
1234         unregister_blkdev(major_nr, "umem");
1235 }
1236
1237 module_init(mm_init);
1238 module_exit(mm_cleanup);
1239
1240 MODULE_AUTHOR(DRIVER_AUTHOR);
1241 MODULE_DESCRIPTION(DRIVER_DESC);
1242 MODULE_LICENSE("GPL");