ide-lib.c

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#include <linux/types.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/interrupt.h>
#include <linux/ide.h>
#include <linux/bitops.h>

void ide_toggle_bounce(ide_drive_t *drive, int on)
{
    u64 addr = BLK_BOUNCE_HIGH; /* dma64_addr_t */

    if (!PCI_DMA_BUS_IS_PHYS) {
        addr = BLK_BOUNCE_ANY;
    } else if (on && drive->media == ide_disk) {
        struct device *dev = drive->hwif->dev;

        if (dev && dev->dma_mask)
            addr = *dev->dma_mask;
    }

    if (drive->queue)
        blk_queue_bounce_limit(drive->queue, addr);
}

u64 ide_get_lba_addr(struct ide_cmd *cmd, int lba48)
{
    struct ide_taskfile *tf = &cmd->tf;
    u32 high, low;

    low  = (tf->lbah << 16) | (tf->lbam << 8) | tf->lbal;
    if (lba48) {
        tf = &cmd->hob;
        high = (tf->lbah << 16) | (tf->lbam << 8) | tf->lbal;
    } else
        high = tf->device & 0xf;

    return ((u64)high << 24) | low;
}
EXPORT_SYMBOL_GPL(ide_get_lba_addr);

static void ide_dump_sector(ide_drive_t *drive)
{
    struct ide_cmd cmd;
    struct ide_taskfile *tf = &cmd.tf;
    u8 lba48 = !!(drive->dev_flags & IDE_DFLAG_LBA48);

    memset(&cmd, 0, sizeof(cmd));
    if (lba48) {
        cmd.valid.in.tf  = IDE_VALID_LBA;
        cmd.valid.in.hob = IDE_VALID_LBA;
        cmd.tf_flags = IDE_TFLAG_LBA48;
    } else
        cmd.valid.in.tf  = IDE_VALID_LBA | IDE_VALID_DEVICE;

    ide_tf_readback(drive, &cmd);

    if (lba48 || (tf->device & ATA_LBA))
        printk(KERN_CONT ", LBAsect=%llu",
            (unsigned long long)ide_get_lba_addr(&cmd, lba48));
    else
        printk(KERN_CONT ", CHS=%d/%d/%d", (tf->lbah << 8) + tf->lbam,
            tf->device & 0xf, tf->lbal);
}

static void ide_dump_ata_error(ide_drive_t *drive, u8 err)
{
    printk(KERN_CONT "{ ");
    if (err & ATA_ABORTED)
        printk(KERN_CONT "DriveStatusError ");
    if (err & ATA_ICRC)
        printk(KERN_CONT "%s",
            (err & ATA_ABORTED) ? "BadCRC " : "BadSector ");
    if (err & ATA_UNC)
        printk(KERN_CONT "UncorrectableError ");
    if (err & ATA_IDNF)
        printk(KERN_CONT "SectorIdNotFound ");
    if (err & ATA_TRK0NF)
        printk(KERN_CONT "TrackZeroNotFound ");
    if (err & ATA_AMNF)
        printk(KERN_CONT "AddrMarkNotFound ");
    printk(KERN_CONT "}");
    if ((err & (ATA_BBK | ATA_ABORTED)) == ATA_BBK ||
        (err & (ATA_UNC | ATA_IDNF | ATA_AMNF))) {
        struct request *rq = drive->hwif->rq;

        ide_dump_sector(drive);

        if (rq)
            printk(KERN_CONT ", sector=%llu",
                   (unsigned long long)blk_rq_pos(rq));
    }
    printk(KERN_CONT "\n");
}

static void ide_dump_atapi_error(ide_drive_t *drive, u8 err)
{
    printk(KERN_CONT "{ ");
    if (err & ATAPI_ILI)
        printk(KERN_CONT "IllegalLengthIndication ");
    if (err & ATAPI_EOM)
        printk(KERN_CONT "EndOfMedia ");
    if (err & ATA_ABORTED)
        printk(KERN_CONT "AbortedCommand ");
    if (err & ATA_MCR)
        printk(KERN_CONT "MediaChangeRequested ");
    if (err & ATAPI_LFS)
        printk(KERN_CONT "LastFailedSense=0x%02x ",
            (err & ATAPI_LFS) >> 4);
    printk(KERN_CONT "}\n");
}

u8 ide_dump_status(ide_drive_t *drive, const char *msg, u8 stat)
{
    u8 err = 0;

    printk(KERN_ERR "%s: %s: status=0x%02x { ", drive->name, msg, stat);
    if (stat & ATA_BUSY)
        printk(KERN_CONT "Busy ");
    else {
        if (stat & ATA_DRDY)
            printk(KERN_CONT "DriveReady ");
        if (stat & ATA_DF)
            printk(KERN_CONT "DeviceFault ");
        if (stat & ATA_DSC)
            printk(KERN_CONT "SeekComplete ");
        if (stat & ATA_DRQ)
            printk(KERN_CONT "DataRequest ");
        if (stat & ATA_CORR)
            printk(KERN_CONT "CorrectedError ");
        if (stat & ATA_IDX)
            printk(KERN_CONT "Index ");
        if (stat & ATA_ERR)
            printk(KERN_CONT "Error ");
    }
    printk(KERN_CONT "}\n");
    if ((stat & (ATA_BUSY | ATA_ERR)) == ATA_ERR) {
        err = ide_read_error(drive);
        printk(KERN_ERR "%s: %s: error=0x%02x ", drive->name, msg, err);
        if (drive->media == ide_disk)
            ide_dump_ata_error(drive, err);
        else
            ide_dump_atapi_error(drive, err);
    }

    printk(KERN_ERR "%s: possibly failed opcode: 0x%02x\n",
        drive->name, drive->hwif->cmd.tf.command);

    return err;
}
EXPORT_SYMBOL(ide_dump_status);