drivers/ide/ide-lib.c

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