diff options
Diffstat (limited to 'drivers/scsi/libata-scsi.c')
-rw-r--r-- | drivers/scsi/libata-scsi.c | 199 |
1 files changed, 26 insertions, 173 deletions
diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c index 410c787..1595378 100644 --- a/drivers/scsi/libata-scsi.c +++ b/drivers/scsi/libata-scsi.c @@ -53,7 +53,6 @@ typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, const u8 *scsicmd); static struct ata_device * ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev); -enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd); #define RW_RECOVERY_MPAGE 0x1 #define RW_RECOVERY_MPAGE_LEN 12 @@ -99,6 +98,7 @@ static const u8 def_control_mpage[CONTROL_MPAGE_LEN] = { * It just needs the eh_timed_out hook. */ struct scsi_transport_template ata_scsi_transport_template = { + .eh_strategy_handler = ata_scsi_error, .eh_timed_out = ata_scsi_timed_out, }; @@ -395,7 +395,7 @@ void ata_dump_status(unsigned id, struct ata_taskfile *tf) int ata_scsi_device_resume(struct scsi_device *sdev) { - struct ata_port *ap = (struct ata_port *) &sdev->host->hostdata[0]; + struct ata_port *ap = ata_shost_to_port(sdev->host); struct ata_device *dev = &ap->device[sdev->id]; return ata_device_resume(ap, dev); @@ -403,7 +403,7 @@ int ata_scsi_device_resume(struct scsi_device *sdev) int ata_scsi_device_suspend(struct scsi_device *sdev, pm_message_t state) { - struct ata_port *ap = (struct ata_port *) &sdev->host->hostdata[0]; + struct ata_port *ap = ata_shost_to_port(sdev->host); struct ata_device *dev = &ap->device[sdev->id]; return ata_device_suspend(ap, dev, state); @@ -546,16 +546,11 @@ void ata_gen_ata_desc_sense(struct ata_queued_cmd *qc) cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; /* - * Read the controller registers. - */ - WARN_ON(qc->ap->ops->tf_read == NULL); - qc->ap->ops->tf_read(qc->ap, tf); - - /* * Use ata_to_sense_error() to map status register bits * onto sense key, asc & ascq. */ - if (tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { + if (qc->err_mask || + tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { ata_to_sense_error(qc->ap->id, tf->command, tf->feature, &sb[1], &sb[2], &sb[3]); sb[1] &= 0x0f; @@ -621,16 +616,11 @@ void ata_gen_fixed_sense(struct ata_queued_cmd *qc) cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; /* - * Read the controller registers. - */ - WARN_ON(qc->ap->ops->tf_read == NULL); - qc->ap->ops->tf_read(qc->ap, tf); - - /* * Use ata_to_sense_error() to map status register bits * onto sense key, asc & ascq. */ - if (tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { + if (qc->err_mask || + tf->command & (ATA_BUSY | ATA_DF | ATA_ERR | ATA_DRQ)) { ata_to_sense_error(qc->ap->id, tf->command, tf->feature, &sb[2], &sb[12], &sb[13]); sb[2] &= 0x0f; @@ -714,7 +704,7 @@ int ata_scsi_slave_config(struct scsi_device *sdev) struct ata_port *ap; struct ata_device *dev; - ap = (struct ata_port *) &sdev->host->hostdata[0]; + ap = ata_shost_to_port(sdev->host); dev = &ap->device[sdev->id]; ata_scsi_dev_config(sdev, dev); @@ -724,141 +714,6 @@ int ata_scsi_slave_config(struct scsi_device *sdev) } /** - * ata_scsi_timed_out - SCSI layer time out callback - * @cmd: timed out SCSI command - * - * Handles SCSI layer timeout. We race with normal completion of - * the qc for @cmd. If the qc is already gone, we lose and let - * the scsi command finish (EH_HANDLED). Otherwise, the qc has - * timed out and EH should be invoked. Prevent ata_qc_complete() - * from finishing it by setting EH_SCHEDULED and return - * EH_NOT_HANDLED. - * - * LOCKING: - * Called from timer context - * - * RETURNS: - * EH_HANDLED or EH_NOT_HANDLED - */ -enum scsi_eh_timer_return ata_scsi_timed_out(struct scsi_cmnd *cmd) -{ - struct Scsi_Host *host = cmd->device->host; - struct ata_port *ap = (struct ata_port *) &host->hostdata[0]; - unsigned long flags; - struct ata_queued_cmd *qc; - enum scsi_eh_timer_return ret = EH_HANDLED; - - DPRINTK("ENTER\n"); - - spin_lock_irqsave(&ap->host_set->lock, flags); - qc = ata_qc_from_tag(ap, ap->active_tag); - if (qc) { - WARN_ON(qc->scsicmd != cmd); - qc->flags |= ATA_QCFLAG_EH_SCHEDULED; - qc->err_mask |= AC_ERR_TIMEOUT; - ret = EH_NOT_HANDLED; - } - spin_unlock_irqrestore(&ap->host_set->lock, flags); - - DPRINTK("EXIT, ret=%d\n", ret); - return ret; -} - -/** - * ata_scsi_error - SCSI layer error handler callback - * @host: SCSI host on which error occurred - * - * Handles SCSI-layer-thrown error events. - * - * LOCKING: - * Inherited from SCSI layer (none, can sleep) - * - * RETURNS: - * Zero. - */ - -int ata_scsi_error(struct Scsi_Host *host) -{ - struct ata_port *ap; - unsigned long flags; - - DPRINTK("ENTER\n"); - - ap = (struct ata_port *) &host->hostdata[0]; - - spin_lock_irqsave(&ap->host_set->lock, flags); - WARN_ON(ap->flags & ATA_FLAG_IN_EH); - ap->flags |= ATA_FLAG_IN_EH; - WARN_ON(ata_qc_from_tag(ap, ap->active_tag) == NULL); - spin_unlock_irqrestore(&ap->host_set->lock, flags); - - ata_port_flush_task(ap); - - ap->ops->eng_timeout(ap); - - WARN_ON(host->host_failed || !list_empty(&host->eh_cmd_q)); - - scsi_eh_flush_done_q(&ap->eh_done_q); - - spin_lock_irqsave(&ap->host_set->lock, flags); - ap->flags &= ~ATA_FLAG_IN_EH; - spin_unlock_irqrestore(&ap->host_set->lock, flags); - - DPRINTK("EXIT\n"); - return 0; -} - -static void ata_eh_scsidone(struct scsi_cmnd *scmd) -{ - /* nada */ -} - -static void __ata_eh_qc_complete(struct ata_queued_cmd *qc) -{ - struct ata_port *ap = qc->ap; - struct scsi_cmnd *scmd = qc->scsicmd; - unsigned long flags; - - spin_lock_irqsave(&ap->host_set->lock, flags); - qc->scsidone = ata_eh_scsidone; - __ata_qc_complete(qc); - WARN_ON(ata_tag_valid(qc->tag)); - spin_unlock_irqrestore(&ap->host_set->lock, flags); - - scsi_eh_finish_cmd(scmd, &ap->eh_done_q); -} - -/** - * ata_eh_qc_complete - Complete an active ATA command from EH - * @qc: Command to complete - * - * Indicate to the mid and upper layers that an ATA command has - * completed. To be used from EH. - */ -void ata_eh_qc_complete(struct ata_queued_cmd *qc) -{ - struct scsi_cmnd *scmd = qc->scsicmd; - scmd->retries = scmd->allowed; - __ata_eh_qc_complete(qc); -} - -/** - * ata_eh_qc_retry - Tell midlayer to retry an ATA command after EH - * @qc: Command to retry - * - * Indicate to the mid and upper layers that an ATA command - * should be retried. To be used from EH. - * - * SCSI midlayer limits the number of retries to scmd->allowed. - * This function might need to adjust scmd->retries for commands - * which get retried due to unrelated NCQ failures. - */ -void ata_eh_qc_retry(struct ata_queued_cmd *qc) -{ - __ata_eh_qc_complete(qc); -} - -/** * ata_scsi_start_stop_xlat - Translate SCSI START STOP UNIT command * @qc: Storage for translated ATA taskfile * @scsicmd: SCSI command to translate @@ -1197,6 +1052,7 @@ static unsigned int ata_scsi_rw_xlat(struct ata_queued_cmd *qc, const u8 *scsicm u64 block; u32 n_block; + qc->flags |= ATA_QCFLAG_IO; tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE; if (scsicmd[0] == WRITE_10 || scsicmd[0] == WRITE_6 || @@ -1343,11 +1199,14 @@ static void ata_scsi_qc_complete(struct ata_queued_cmd *qc) */ if (((cdb[0] == ATA_16) || (cdb[0] == ATA_12)) && ((cdb[2] & 0x20) || need_sense)) { + qc->ap->ops->tf_read(qc->ap, &qc->tf); ata_gen_ata_desc_sense(qc); } else { if (!need_sense) { cmd->result = SAM_STAT_GOOD; } else { + qc->ap->ops->tf_read(qc->ap, &qc->tf); + /* TODO: decide which descriptor format to use * for 48b LBA devices and call that here * instead of the fixed desc, which is only @@ -1431,9 +1290,7 @@ static void ata_scsi_translate(struct ata_port *ap, struct ata_device *dev, goto early_finish; /* select device, send command to hardware */ - qc->err_mask = ata_qc_issue(qc); - if (qc->err_mask) - ata_qc_complete(qc); + ata_qc_issue(qc); VPRINTK("EXIT\n"); return; @@ -2141,13 +1998,15 @@ void ata_scsi_badcmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *), u8 static void atapi_sense_complete(struct ata_queued_cmd *qc) { - if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) + if (qc->err_mask && ((qc->err_mask & AC_ERR_DEV) == 0)) { /* FIXME: not quite right; we don't want the * translation of taskfile registers into * a sense descriptors, since that's only * correct for ATA, not ATAPI */ + qc->ap->ops->tf_read(qc->ap, &qc->tf); ata_gen_ata_desc_sense(qc); + } qc->scsidone(qc->scsicmd); ata_qc_free(qc); @@ -2199,9 +2058,7 @@ static void atapi_request_sense(struct ata_queued_cmd *qc) qc->complete_fn = atapi_sense_complete; - qc->err_mask = ata_qc_issue(qc); - if (qc->err_mask) - ata_qc_complete(qc); + ata_qc_issue(qc); DPRINTK("EXIT\n"); } @@ -2217,17 +2074,15 @@ static void atapi_qc_complete(struct ata_queued_cmd *qc) cmd->result = SAM_STAT_CHECK_CONDITION; atapi_request_sense(qc); return; - } - - else if (unlikely(err_mask)) + } else if (unlikely(err_mask)) { /* FIXME: not quite right; we don't want the * translation of taskfile registers into * a sense descriptors, since that's only * correct for ATA, not ATAPI */ + qc->ap->ops->tf_read(qc->ap, &qc->tf); ata_gen_ata_desc_sense(qc); - - else { + } else { u8 *scsicmd = cmd->cmnd; if ((scsicmd[0] == INQUIRY) && ((scsicmd[1] & 0x03) == 0)) { @@ -2309,11 +2164,9 @@ static unsigned int atapi_xlat(struct ata_queued_cmd *qc, const u8 *scsicmd) qc->tf.protocol = ATA_PROT_ATAPI_DMA; qc->tf.feature |= ATAPI_PKT_DMA; -#ifdef ATAPI_ENABLE_DMADIR - /* some SATA bridges need us to indicate data xfer direction */ - if (cmd->sc_data_direction != DMA_TO_DEVICE) + if (atapi_dmadir && (cmd->sc_data_direction != DMA_TO_DEVICE)) + /* some SATA bridges need us to indicate data xfer direction */ qc->tf.feature |= ATAPI_DMADIR; -#endif } qc->nbytes = cmd->bufflen; @@ -2353,7 +2206,7 @@ ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev) (scsidev->lun != 0))) return NULL; - if (unlikely(!ata_dev_present(dev))) + if (unlikely(!ata_dev_enabled(dev))) return NULL; if (!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) { @@ -2625,7 +2478,7 @@ int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) struct scsi_device *scsidev = cmd->device; struct Scsi_Host *shost = scsidev->host; - ap = (struct ata_port *) &shost->hostdata[0]; + ap = ata_shost_to_port(shost); spin_unlock(shost->host_lock); spin_lock(&ap->host_set->lock); @@ -2741,13 +2594,13 @@ void ata_scsi_scan_host(struct ata_port *ap) struct ata_device *dev; unsigned int i; - if (ap->flags & ATA_FLAG_PORT_DISABLED) + if (ap->flags & ATA_FLAG_DISABLED) return; for (i = 0; i < ATA_MAX_DEVICES; i++) { dev = &ap->device[i]; - if (ata_dev_present(dev)) + if (ata_dev_enabled(dev)) scsi_scan_target(&ap->host->shost_gendev, 0, i, 0, 0); } } |