drivers/ide/ide-lib.c

   1 #include <linux/types.h>
   2 #include <linux/string.h>
   3 #include <linux/kernel.h>
   4 #include <linux/interrupt.h>
   5 #include <linux/ide.h>
   6 #include <linux/bitops.h>
   7
   8 /**
   9  *      ide_toggle_bounce       -       handle bounce buffering
  10  *      @drive: drive to update
  11  *      @on: on/off boolean
  12  *
  13  *      Enable or disable bounce buffering for the device. Drives move
  14  *      between PIO and DMA and that changes the rules we need.
  15  */
  16
  17 void ide_toggle_bounce(ide_drive_t *drive, int on)
  18 {
  19         u64 addr = BLK_BOUNCE_HIGH;     /* dma64_addr_t */
  20
  21         if (!PCI_DMA_BUS_IS_PHYS) {
  22                 addr = BLK_BOUNCE_ANY;
  23         } else if (on && drive->media == ide_disk) {
  24                 struct device *dev = drive->hwif->dev;
  25
  26                 if (dev && dev->dma_mask)
  27                         addr = *dev->dma_mask;
  28         }
  29
  30         if (drive->queue)
  31                 blk_queue_bounce_limit(drive->queue, addr);
  32 }
  33
  34 static void ide_dump_opcode(ide_drive_t *drive)
  35 {
  36         struct request *rq = drive->hwif->rq;
  37         struct ide_cmd *cmd = NULL;
  38
  39         if (!rq)
  40                 return;
  41
  42         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE)
  43                 cmd = rq->special;
  44
  45         printk(KERN_ERR "ide: failed opcode was: ");
  46         if (cmd == NULL)
  47                 printk(KERN_CONT "unknown\n");
  48         else
  49                 printk(KERN_CONT "0x%02x\n", cmd->tf.command);
  50 }
  51
  52 u64 ide_get_lba_addr(struct ide_taskfile *tf, int lba48)
  53 {
  54         u32 high, low;
  55
  56         if (lba48)
  57                 high = (tf->hob_lbah << 16) | (tf->hob_lbam << 8) |
  58                         tf->hob_lbal;
  59         else
  60                 high = tf->device & 0xf;
  61         low  = (tf->lbah << 16) | (tf->lbam << 8) | tf->lbal;
  62
  63         return ((u64)high << 24) | low;
  64 }
  65 EXPORT_SYMBOL_GPL(ide_get_lba_addr);
  66
  67 static void ide_dump_sector(ide_drive_t *drive)
  68 {
  69         struct ide_cmd cmd;
  70         struct ide_taskfile *tf = &cmd.tf;
  71         u8 lba48 = !!(drive->dev_flags & IDE_DFLAG_LBA48);
  72
  73         memset(&cmd, 0, sizeof(cmd));
  74         if (lba48) {
  75                 cmd.valid.in.tf  = IDE_VALID_LBA;
  76                 cmd.valid.in.hob = IDE_VALID_LBA;
  77                 cmd.tf_flags = IDE_TFLAG_LBA48;
  78         } else
  79                 cmd.valid.in.tf  = IDE_VALID_LBA | IDE_VALID_DEVICE;
  80
  81         drive->hwif->tp_ops->tf_read(drive, &cmd);
  82
  83         if (lba48 || (tf->device & ATA_LBA))
  84                 printk(KERN_CONT ", LBAsect=%llu",
  85                         (unsigned long long)ide_get_lba_addr(tf, lba48));
  86         else
  87                 printk(KERN_CONT ", CHS=%d/%d/%d", (tf->lbah << 8) + tf->lbam,
  88                         tf->device & 0xf, tf->lbal);
  89 }
  90
  91 static void ide_dump_ata_error(ide_drive_t *drive, u8 err)
  92 {
  93         printk(KERN_ERR "{ ");
  94         if (err & ATA_ABORTED)
  95                 printk(KERN_CONT "DriveStatusError ");
  96         if (err & ATA_ICRC)
  97                 printk(KERN_CONT "%s",
  98                         (err & ATA_ABORTED) ? "BadCRC " : "BadSector ");
  99         if (err & ATA_UNC)
 100                 printk(KERN_CONT "UncorrectableError ");
 101         if (err & ATA_IDNF)
 102                 printk(KERN_CONT "SectorIdNotFound ");
 103         if (err & ATA_TRK0NF)
 104                 printk(KERN_CONT "TrackZeroNotFound ");
 105         if (err & ATA_AMNF)
 106                 printk(KERN_CONT "AddrMarkNotFound ");
 107         printk(KERN_CONT "}");
 108         if ((err & (ATA_BBK | ATA_ABORTED)) == ATA_BBK ||
 109             (err & (ATA_UNC | ATA_IDNF | ATA_AMNF))) {
 110                 struct request *rq = drive->hwif->rq;
 111
 112                 ide_dump_sector(drive);
 113
 114                 if (rq)
 115                         printk(KERN_CONT ", sector=%llu",
 116                                (unsigned long long)rq->sector);
 117         }
 118         printk(KERN_CONT "\n");
 119 }
 120
 121 static void ide_dump_atapi_error(ide_drive_t *drive, u8 err)
 122 {
 123         printk(KERN_ERR "{ ");
 124         if (err & ATAPI_ILI)
 125                 printk(KERN_CONT "IllegalLengthIndication ");
 126         if (err & ATAPI_EOM)
 127                 printk(KERN_CONT "EndOfMedia ");
 128         if (err & ATA_ABORTED)
 129                 printk(KERN_CONT "AbortedCommand ");
 130         if (err & ATA_MCR)
 131                 printk(KERN_CONT "MediaChangeRequested ");
 132         if (err & ATAPI_LFS)
 133                 printk(KERN_CONT "LastFailedSense=0x%02x ",
 134                         (err & ATAPI_LFS) >> 4);
 135         printk(KERN_CONT "}\n");
 136 }
 137
 138 /**
 139  *      ide_dump_status         -       translate ATA/ATAPI error
 140  *      @drive: drive that status applies to
 141  *      @msg: text message to print
 142  *      @stat: status byte to decode
 143  *
 144  *      Error reporting, in human readable form (luxurious, but a memory hog).
 145  *      Combines the drive name, message and status byte to provide a
 146  *      user understandable explanation of the device error.
 147  */
 148
 149 u8 ide_dump_status(ide_drive_t *drive, const char *msg, u8 stat)
 150 {
 151         u8 err = 0;
 152
 153         printk(KERN_ERR "%s: %s: status=0x%02x { ", drive->name, msg, stat);
 154         if (stat & ATA_BUSY)
 155                 printk(KERN_CONT "Busy ");
 156         else {
 157                 if (stat & ATA_DRDY)
 158                         printk(KERN_CONT "DriveReady ");
 159                 if (stat & ATA_DF)
 160                         printk(KERN_CONT "DeviceFault ");
 161                 if (stat & ATA_DSC)
 162                         printk(KERN_CONT "SeekComplete ");
 163                 if (stat & ATA_DRQ)
 164                         printk(KERN_CONT "DataRequest ");
 165                 if (stat & ATA_CORR)
 166                         printk(KERN_CONT "CorrectedError ");
 167                 if (stat & ATA_IDX)
 168                         printk(KERN_CONT "Index ");
 169                 if (stat & ATA_ERR)
 170                         printk(KERN_CONT "Error ");
 171         }
 172         printk(KERN_CONT "}\n");
 173         if ((stat & (ATA_BUSY | ATA_ERR)) == ATA_ERR) {
 174                 err = ide_read_error(drive);
 175                 printk(KERN_ERR "%s: %s: error=0x%02x ", drive->name, msg, err);
 176                 if (drive->media == ide_disk)
 177                         ide_dump_ata_error(drive, err);
 178                 else
 179                         ide_dump_atapi_error(drive, err);
 180         }
 181         ide_dump_opcode(drive);
 182         return err;
 183 }
 184 EXPORT_SYMBOL(ide_dump_status);