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