[PATCH] libata: add detailed AC_ERR_* flags

Add detailed AC_ERR_* flags and use them.  Long-term goal is to
describe all errors with err_mask and tf combination (tf for failed
sector information, etc...).  After proper error diagnosis is
implemented, sense data should also be generated from err_mask instead
of directly from hardware tf registers as it is currently.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c
index a168b52..bb3686a 100644 (file)
--- a/drivers/scsi/ahci.c
+++ b/drivers/scsi/ahci.c
@@ -680,7 +680,7 @@ static void ahci_eng_timeout(struct ata_port *ap)
                 * not being called from the SCSI EH.
                 */
                qc->scsidone = scsi_finish_command;
-               qc->err_mask |= AC_ERR_OTHER;
+               qc->err_mask |= AC_ERR_TIMEOUT;
                ata_qc_complete(qc);
        }
 

diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 43a2328..f5519f0 100644 (file)
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -1142,7 +1142,7 @@ ata_exec_internal(struct ata_port *ap, struct ata_device *dev,
                 * spurious interrupt.  We can live with that.
                 */
                if (qc->flags & ATA_QCFLAG_ACTIVE) {
-                       qc->err_mask = AC_ERR_OTHER;
+                       qc->err_mask = AC_ERR_TIMEOUT;
                        ata_qc_complete(qc);
                        printk(KERN_WARNING "ata%u: qc timeout (cmd 0x%x)\n",
                               ap->id, command);
@@ -2917,7 +2917,7 @@ static unsigned long ata_pio_poll(struct ata_port *ap)
        status = ata_chk_status(ap);
        if (status & ATA_BUSY) {
                if (time_after(jiffies, ap->pio_task_timeout)) {
-                       qc->err_mask |= AC_ERR_ATA_BUS;
+                       qc->err_mask |= AC_ERR_TIMEOUT;
                        ap->hsm_task_state = HSM_ST_TMOUT;
                        return 0;
                }
@@ -3295,7 +3295,7 @@ static void atapi_pio_bytes(struct ata_queued_cmd *qc)
 err_out:
        printk(KERN_INFO "ata%u: dev %u: ATAPI check failed\n",
              ap->id, dev->devno);
-       qc->err_mask |= AC_ERR_ATA_BUS;
+       qc->err_mask |= AC_ERR_HSM;
        ap->hsm_task_state = HSM_ST_ERR;
 }
 
@@ -3353,7 +3353,7 @@ static void ata_pio_block(struct ata_port *ap)
        } else {
                /* handle BSY=0, DRQ=0 as error */
                if ((status & ATA_DRQ) == 0) {
-                       qc->err_mask |= AC_ERR_ATA_BUS;
+                       qc->err_mask |= AC_ERR_HSM;
                        ap->hsm_task_state = HSM_ST_ERR;
                        return;
                }
@@ -4159,14 +4159,14 @@ static void atapi_packet_task(void *_data)
        /* sleep-wait for BSY to clear */
        DPRINTK("busy wait\n");
        if (ata_busy_sleep(ap, ATA_TMOUT_CDB_QUICK, ATA_TMOUT_CDB)) {
-               qc->err_mask |= AC_ERR_ATA_BUS;
+               qc->err_mask |= AC_ERR_TIMEOUT;
                goto err_out;
        }
 
        /* make sure DRQ is set */
        status = ata_chk_status(ap);
        if ((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ) {
-               qc->err_mask |= AC_ERR_ATA_BUS;
+               qc->err_mask |= AC_ERR_HSM;
                goto err_out;
        }
 

diff --git a/drivers/scsi/sata_mv.c b/drivers/scsi/sata_mv.c
index cd54244..89bcd85 100644 (file)
--- a/drivers/scsi/sata_mv.c
+++ b/drivers/scsi/sata_mv.c
@@ -1866,7 +1866,7 @@ static void mv_eng_timeout(struct ata_port *ap)
                 */
                spin_lock_irqsave(&ap->host_set->lock, flags);
                qc->scsidone = scsi_finish_command;
-               qc->err_mask |= AC_ERR_OTHER;
+               qc->err_mask |= AC_ERR_TIMEOUT;
                ata_qc_complete(qc);
                spin_unlock_irqrestore(&ap->host_set->lock, flags);
        }

diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c
index 9231301..fb59012 100644 (file)
--- a/drivers/scsi/sata_sil24.c
+++ b/drivers/scsi/sata_sil24.c
@@ -653,7 +653,7 @@ static void sil24_eng_timeout(struct ata_port *ap)
         */
        printk(KERN_ERR "ata%u: command timeout\n", ap->id);
        qc->scsidone = scsi_finish_command;
-       qc->err_mask |= AC_ERR_OTHER;
+       qc->err_mask |= AC_ERR_TIMEOUT;
        ata_qc_complete(qc);
 
        sil24_reset_controller(ap);

diff --git a/include/linux/libata.h b/include/linux/libata.h
index d58b659..8ff3a7f 100644 (file)
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -222,10 +222,15 @@ enum hsm_task_states {
 };
 
 enum ata_completion_errors {
-       AC_ERR_OTHER            = (1 << 0),
-       AC_ERR_DEV              = (1 << 1),
-       AC_ERR_ATA_BUS          = (1 << 2),
-       AC_ERR_HOST_BUS         = (1 << 3),
+       AC_ERR_DEV              = (1 << 0), /* device reported error */
+       AC_ERR_HSM              = (1 << 1), /* host state machine violation */
+       AC_ERR_TIMEOUT          = (1 << 2), /* timeout */
+       AC_ERR_MEDIA            = (1 << 3), /* media error */
+       AC_ERR_ATA_BUS          = (1 << 4), /* ATA bus error */
+       AC_ERR_HOST_BUS         = (1 << 5), /* host bus error */
+       AC_ERR_SYSTEM           = (1 << 6), /* system error */
+       AC_ERR_INVALID          = (1 << 7), /* invalid argument */
+       AC_ERR_OTHER            = (1 << 8), /* unknown */
 };
 
 /* forward declarations */
@@ -833,7 +838,7 @@ static inline int ata_try_flush_cache(const struct ata_device *dev)
 static inline unsigned int ac_err_mask(u8 status)
 {
        if (status & ATA_BUSY)
-               return AC_ERR_ATA_BUS;
+               return AC_ERR_HSM;
        if (status & (ATA_ERR | ATA_DF))
                return AC_ERR_DEV;
        return 0;