Beispiel #1
0
static void sas_scsi_task_done(struct sas_task *task)
{
	struct scsi_cmnd *sc = task->uldd_task;
	struct domain_device *dev = task->dev;
	struct sas_ha_struct *ha = dev->port->ha;
	unsigned long flags;

	spin_lock_irqsave(&dev->done_lock, flags);
	if (test_bit(SAS_HA_FROZEN, &ha->state))
		task = NULL;
	else
		ASSIGN_SAS_TASK(sc, NULL);
	spin_unlock_irqrestore(&dev->done_lock, flags);

	if (unlikely(!task)) {
		/* task will be completed by the error handler */
		SAS_DPRINTK("task done but aborted\n");
		return;
	}

	if (unlikely(!sc)) {
		SAS_DPRINTK("task_done called with non existing SCSI cmnd!\n");
		list_del_init(&task->list);
		sas_free_task(task);
		return;
	}

	sas_end_task(sc, task);
	sc->scsi_done(sc);
}
Beispiel #2
0
static void sas_ata_task_done(struct sas_task *task)
{
	struct ata_queued_cmd *qc = task->uldd_task;
	struct domain_device *dev;
	struct task_status_struct *stat = &task->task_status;
	struct ata_task_resp *resp = (struct ata_task_resp *)stat->buf;
	struct sas_ha_struct *sas_ha;
	enum ata_completion_errors ac;
	unsigned long flags;

	if (!qc)
		goto qc_already_gone;

	dev = qc->ap->private_data;
	sas_ha = dev->port->ha;

	spin_lock_irqsave(dev->sata_dev.ap->lock, flags);
	if (stat->stat == SAS_PROTO_RESPONSE || stat->stat == SAM_GOOD) {
		ata_tf_from_fis(resp->ending_fis, &dev->sata_dev.tf);
		qc->err_mask |= ac_err_mask(dev->sata_dev.tf.command);
		dev->sata_dev.sstatus = resp->sstatus;
		dev->sata_dev.serror = resp->serror;
		dev->sata_dev.scontrol = resp->scontrol;
	} else if (stat->stat != SAM_STAT_GOOD) {
		ac = sas_to_ata_err(stat);
		if (ac) {
			SAS_DPRINTK("%s: SAS error %x\n", __FUNCTION__,
				    stat->stat);
			/* We saw a SAS error. Send a vague error. */
			qc->err_mask = ac;
			dev->sata_dev.tf.feature = 0x04; /* status err */
			dev->sata_dev.tf.command = ATA_ERR;
		}
	}

	qc->lldd_task = NULL;
	if (qc->scsicmd)
		ASSIGN_SAS_TASK(qc->scsicmd, NULL);
	ata_qc_complete(qc);
	spin_unlock_irqrestore(dev->sata_dev.ap->lock, flags);

	/*
	 * If the sas_task has an ata qc, a scsi_cmnd and the aborted
	 * flag is set, then we must have come in via the libsas EH
	 * functions.  When we exit this function, we need to put the
	 * scsi_cmnd on the list of finished errors.  The ata_qc_complete
	 * call cleans up the libata side of things but we're protected
	 * from the scsi_cmnd going away because the scsi_cmnd is owned
	 * by the EH, making libata's call to scsi_done a NOP.
	 */
	spin_lock_irqsave(&task->task_state_lock, flags);
	if (qc->scsicmd && task->task_state_flags & SAS_TASK_STATE_ABORTED)
		scsi_eh_finish_cmd(qc->scsicmd, &sas_ha->eh_done_q);
	spin_unlock_irqrestore(&task->task_state_lock, flags);

qc_already_gone:
	list_del_init(&task->list);
	sas_free_task(task);
}
Beispiel #3
0
static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc)
{
	int res;
	struct sas_task *task;
	struct domain_device *dev = qc->ap->private_data;
	struct sas_ha_struct *sas_ha = dev->port->ha;
	struct Scsi_Host *host = sas_ha->core.shost;
	struct sas_internal *i = to_sas_internal(host->transportt);
	struct scatterlist *sg;
	unsigned int xfer = 0;
	unsigned int si;

	/* If the device fell off, no sense in issuing commands */
	if (dev->gone)
		return AC_ERR_SYSTEM;

	task = sas_alloc_task(GFP_ATOMIC);
	if (!task)
		return AC_ERR_SYSTEM;
	task->dev = dev;
	task->task_proto = SAS_PROTOCOL_STP;
	task->task_done = sas_ata_task_done;

	if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
	    qc->tf.command == ATA_CMD_FPDMA_READ) {
		/* Need to zero out the tag libata assigned us */
		qc->tf.nsect = 0;
	}

	ata_tf_to_fis(&qc->tf, 1, 0, (u8*)&task->ata_task.fis);
	task->uldd_task = qc;
	if (ata_is_atapi(qc->tf.protocol)) {
		memcpy(task->ata_task.atapi_packet, qc->cdb, qc->dev->cdb_len);
		task->total_xfer_len = qc->nbytes;
		task->num_scatter = qc->n_elem;
	} else {
		for_each_sg(qc->sg, sg, qc->n_elem, si)
			xfer += sg->length;

		task->total_xfer_len = xfer;
		task->num_scatter = si;
	}

	task->data_dir = qc->dma_dir;
	task->scatter = qc->sg;
	task->ata_task.retry_count = 1;
	task->task_state_flags = SAS_TASK_STATE_PENDING;
	qc->lldd_task = task;

	switch (qc->tf.protocol) {
	case ATA_PROT_NCQ:
		task->ata_task.use_ncq = 1;
		/* fall through */
	case ATAPI_PROT_DMA:
	case ATA_PROT_DMA:
		task->ata_task.dma_xfer = 1;
		break;
	}

	if (qc->scsicmd)
		ASSIGN_SAS_TASK(qc->scsicmd, task);

	if (sas_ha->lldd_max_execute_num < 2)
		res = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC);
	else
		res = sas_queue_up(task);

	/* Examine */
	if (res) {
		SAS_DPRINTK("lldd_execute_task returned: %d\n", res);

		if (qc->scsicmd)
			ASSIGN_SAS_TASK(qc->scsicmd, NULL);
		sas_free_task(task);
		return AC_ERR_SYSTEM;
	}

	return 0;
}
static void sas_ata_task_done(struct sas_task *task)
{
	struct ata_queued_cmd *qc = task->uldd_task;
	struct domain_device *dev = task->dev;
	struct task_status_struct *stat = &task->task_status;
	struct ata_task_resp *resp = (struct ata_task_resp *)stat->buf;
	struct sas_ha_struct *sas_ha = dev->port->ha;
	enum ata_completion_errors ac;
	unsigned long flags;
	struct ata_link *link;
	struct ata_port *ap;

	spin_lock_irqsave(&dev->done_lock, flags);
	if (test_bit(SAS_HA_FROZEN, &sas_ha->state))
		task = NULL;
	else if (qc && qc->scsicmd)
		ASSIGN_SAS_TASK(qc->scsicmd, NULL);
	spin_unlock_irqrestore(&dev->done_lock, flags);

	/* check if libsas-eh got to the task before us */
	if (unlikely(!task))
		return;

	if (!qc)
		goto qc_already_gone;

	ap = qc->ap;
	link = &ap->link;

	spin_lock_irqsave(ap->lock, flags);
	/* check if we lost the race with libata/sas_ata_post_internal() */
	if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) {
		spin_unlock_irqrestore(ap->lock, flags);
		if (qc->scsicmd)
			goto qc_already_gone;
		else {
			/* if eh is not involved and the port is frozen then the
			 * ata internal abort process has taken responsibility
			 * for this sas_task
			 */
			return;
		}
	}

	if (stat->stat == SAS_PROTO_RESPONSE || stat->stat == SAM_STAT_GOOD ||
	    ((stat->stat == SAM_STAT_CHECK_CONDITION &&
	      dev->sata_dev.command_set == ATAPI_COMMAND_SET))) {
		memcpy(dev->sata_dev.fis, resp->ending_fis, ATA_RESP_FIS_SIZE);

		if (!link->sactive) {
			qc->err_mask |= ac_err_mask(dev->sata_dev.fis[2]);
		} else {
			link->eh_info.err_mask |= ac_err_mask(dev->sata_dev.fis[2]);
			if (unlikely(link->eh_info.err_mask))
				qc->flags |= ATA_QCFLAG_FAILED;
		}
	} else {
		ac = sas_to_ata_err(stat);
		if (ac) {
			SAS_DPRINTK("%s: SAS error %x\n", __func__,
				    stat->stat);
			/* We saw a SAS error. Send a vague error. */
			if (!link->sactive) {
				qc->err_mask = ac;
			} else {
				link->eh_info.err_mask |= AC_ERR_DEV;
				qc->flags |= ATA_QCFLAG_FAILED;
			}

			dev->sata_dev.fis[3] = 0x04; /* status err */
			dev->sata_dev.fis[2] = ATA_ERR;
		}
	}

	qc->lldd_task = NULL;
	ata_qc_complete(qc);
	spin_unlock_irqrestore(ap->lock, flags);

qc_already_gone:
	list_del_init(&task->list);
	sas_free_task(task);
}
static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc)
{
	unsigned long flags;
	struct sas_task *task;
	struct scatterlist *sg;
	int ret = AC_ERR_SYSTEM;
	unsigned int si, xfer = 0;
	struct ata_port *ap = qc->ap;
	struct domain_device *dev = ap->private_data;
	struct sas_ha_struct *sas_ha = dev->port->ha;
	struct Scsi_Host *host = sas_ha->core.shost;
	struct sas_internal *i = to_sas_internal(host->transportt);

	/* TODO: audit callers to ensure they are ready for qc_issue to
	 * unconditionally re-enable interrupts
	 */
	local_irq_save(flags);
	spin_unlock(ap->lock);

	/* If the device fell off, no sense in issuing commands */
	if (test_bit(SAS_DEV_GONE, &dev->state))
		goto out;

	task = sas_alloc_task(GFP_ATOMIC);
	if (!task)
		goto out;
	task->dev = dev;
	task->task_proto = SAS_PROTOCOL_STP;
	task->task_done = sas_ata_task_done;

	if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
	    qc->tf.command == ATA_CMD_FPDMA_READ) {
		/* Need to zero out the tag libata assigned us */
		qc->tf.nsect = 0;
	}

	ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, (u8 *)&task->ata_task.fis);
	task->uldd_task = qc;
	if (ata_is_atapi(qc->tf.protocol)) {
		memcpy(task->ata_task.atapi_packet, qc->cdb, qc->dev->cdb_len);
		task->total_xfer_len = qc->nbytes;
		task->num_scatter = qc->n_elem;
	} else {
		for_each_sg(qc->sg, sg, qc->n_elem, si)
			xfer += sg->length;

		task->total_xfer_len = xfer;
		task->num_scatter = si;
	}

	task->data_dir = qc->dma_dir;
	task->scatter = qc->sg;
	task->ata_task.retry_count = 1;
	task->task_state_flags = SAS_TASK_STATE_PENDING;
	qc->lldd_task = task;

	switch (qc->tf.protocol) {
	case ATA_PROT_NCQ:
		task->ata_task.use_ncq = 1;
		/* fall through */
	case ATAPI_PROT_DMA:
	case ATA_PROT_DMA:
		task->ata_task.dma_xfer = 1;
		break;
	}

	if (qc->scsicmd)
		ASSIGN_SAS_TASK(qc->scsicmd, task);

	if (sas_ha->lldd_max_execute_num < 2)
		ret = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC);
	else
		ret = sas_queue_up(task);

	/* Examine */
	if (ret) {
		SAS_DPRINTK("lldd_execute_task returned: %d\n", ret);

		if (qc->scsicmd)
			ASSIGN_SAS_TASK(qc->scsicmd, NULL);
		sas_free_task(task);
		ret = AC_ERR_SYSTEM;
	}

 out:
	spin_lock(ap->lock);
	local_irq_restore(flags);
	return ret;
}
static void sas_scsi_task_done(struct sas_task *task)
{
	struct task_status_struct *ts = &task->task_status;
	struct scsi_cmnd *sc = task->uldd_task;
	int hs = 0, stat = 0;

	if (unlikely(task->task_state_flags & SAS_TASK_STATE_ABORTED)) {
		/* Aborted tasks will be completed by the error handler */
		SAS_DPRINTK("task done but aborted\n");
		return;
	}

	if (unlikely(!sc)) {
		SAS_DPRINTK("task_done called with non existing SCSI cmnd!\n");
		list_del_init(&task->list);
		sas_free_task(task);
		return;
	}

	if (ts->resp == SAS_TASK_UNDELIVERED) {
		/* transport error */
		hs = DID_NO_CONNECT;
	} else { /* ts->resp == SAS_TASK_COMPLETE */
		/* task delivered, what happened afterwards? */
		switch (ts->stat) {
		case SAS_DEV_NO_RESPONSE:
		case SAS_INTERRUPTED:
		case SAS_PHY_DOWN:
		case SAS_NAK_R_ERR:
		case SAS_OPEN_TO:
			hs = DID_NO_CONNECT;
			break;
		case SAS_DATA_UNDERRUN:
			scsi_set_resid(sc, ts->residual);
			if (scsi_bufflen(sc) - scsi_get_resid(sc) < sc->underflow)
				hs = DID_ERROR;
			break;
		case SAS_DATA_OVERRUN:
			hs = DID_ERROR;
			break;
		case SAS_QUEUE_FULL:
			hs = DID_SOFT_ERROR; /* retry */
			break;
		case SAS_DEVICE_UNKNOWN:
			hs = DID_BAD_TARGET;
			break;
		case SAS_SG_ERR:
			hs = DID_PARITY;
			break;
		case SAS_OPEN_REJECT:
			if (ts->open_rej_reason == SAS_OREJ_RSVD_RETRY)
				hs = DID_SOFT_ERROR; /* retry */
			else
				hs = DID_ERROR;
			break;
		case SAS_PROTO_RESPONSE:
			SAS_DPRINTK("LLDD:%s sent SAS_PROTO_RESP for an SSP "
				    "task; please report this\n",
				    task->dev->port->ha->sas_ha_name);
			break;
		case SAS_ABORTED_TASK:
			hs = DID_ABORT;
			break;
		case SAM_STAT_CHECK_CONDITION:
			memcpy(sc->sense_buffer, ts->buf,
			       min(SCSI_SENSE_BUFFERSIZE, ts->buf_valid_size));
			stat = SAM_STAT_CHECK_CONDITION;
			break;
		default:
			stat = ts->stat;
			break;
		}
	}
	ASSIGN_SAS_TASK(sc, NULL);
	sc->result = (hs << 16) | stat;
	list_del_init(&task->list);
	sas_free_task(task);
	sc->scsi_done(sc);
}
Beispiel #7
0
static void sas_ata_task_done(struct sas_task *task)
{
    struct ata_queued_cmd *qc = task->uldd_task;
    struct domain_device *dev;
    struct task_status_struct *stat = &task->task_status;
    struct ata_task_resp *resp = (struct ata_task_resp *)stat->buf;
    struct sas_ha_struct *sas_ha;
    enum ata_completion_errors ac;
    unsigned long flags;
    struct ata_link *link;

    if (!qc)
        goto qc_already_gone;

    dev = qc->ap->private_data;
    sas_ha = dev->port->ha;
    link = &dev->sata_dev.ap->link;

    spin_lock_irqsave(dev->sata_dev.ap->lock, flags);
    if (stat->stat == SAS_PROTO_RESPONSE || stat->stat == SAM_STAT_GOOD ||
            ((stat->stat == SAM_STAT_CHECK_CONDITION &&
              dev->sata_dev.command_set == ATAPI_COMMAND_SET))) {
        memcpy(dev->sata_dev.fis, resp->ending_fis, ATA_RESP_FIS_SIZE);

        if (!link->sactive) {
            qc->err_mask |= ac_err_mask(dev->sata_dev.fis[2]);
        } else {
            link->eh_info.err_mask |= ac_err_mask(dev->sata_dev.fis[2]);
            if (unlikely(link->eh_info.err_mask))
                qc->flags |= ATA_QCFLAG_FAILED;
        }

        dev->sata_dev.sstatus = resp->sstatus;
        dev->sata_dev.serror = resp->serror;
        dev->sata_dev.scontrol = resp->scontrol;
    } else {
        ac = sas_to_ata_err(stat);
        if (ac) {
            SAS_DPRINTK("%s: SAS error %x\n", __func__,
                        stat->stat);
            /* We saw a SAS error. Send a vague error. */
            if (!link->sactive) {
                qc->err_mask = ac;
            } else {
                link->eh_info.err_mask |= AC_ERR_DEV;
                qc->flags |= ATA_QCFLAG_FAILED;
            }

            dev->sata_dev.fis[3] = 0x04; /* status err */
            dev->sata_dev.fis[2] = ATA_ERR;
        }
    }

    qc->lldd_task = NULL;
    if (qc->scsicmd)
        ASSIGN_SAS_TASK(qc->scsicmd, NULL);
    ata_qc_complete(qc);
    spin_unlock_irqrestore(dev->sata_dev.ap->lock, flags);

    /*
     * If the sas_task has an ata qc, a scsi_cmnd and the aborted
     * flag is set, then we must have come in via the libsas EH
     * functions.  When we exit this function, we need to put the
     * scsi_cmnd on the list of finished errors.  The ata_qc_complete
     * call cleans up the libata side of things but we're protected
     * from the scsi_cmnd going away because the scsi_cmnd is owned
     * by the EH, making libata's call to scsi_done a NOP.
     */
    spin_lock_irqsave(&task->task_state_lock, flags);
    if (qc->scsicmd && task->task_state_flags & SAS_TASK_STATE_ABORTED)
        scsi_eh_finish_cmd(qc->scsicmd, &sas_ha->eh_done_q);
    spin_unlock_irqrestore(&task->task_state_lock, flags);

qc_already_gone:
    list_del_init(&task->list);
    sas_free_task(task);
}
static void sas_ata_task_done(struct sas_task *task)
{
	struct ata_queued_cmd *qc = task->uldd_task;
	struct domain_device *dev = task->dev;
	struct task_status_struct *stat = &task->task_status;
	struct ata_task_resp *resp = (struct ata_task_resp *)stat->buf;
	struct sas_ha_struct *sas_ha = dev->port->ha;
	enum ata_completion_errors ac;
	unsigned long flags;
	struct ata_link *link;
	struct ata_port *ap;

	spin_lock_irqsave(&dev->done_lock, flags);
	if (test_bit(SAS_HA_FROZEN, &sas_ha->state))
		task = NULL;
	else if (qc && qc->scsicmd)
		ASSIGN_SAS_TASK(qc->scsicmd, NULL);
	spin_unlock_irqrestore(&dev->done_lock, flags);

	
	if (unlikely(!task))
		return;

	if (!qc)
		goto qc_already_gone;

	ap = qc->ap;
	link = &ap->link;

	spin_lock_irqsave(ap->lock, flags);
	
	if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) {
		spin_unlock_irqrestore(ap->lock, flags);
		if (qc->scsicmd)
			goto qc_already_gone;
		else {
			return;
		}
	}

	if (stat->stat == SAS_PROTO_RESPONSE || stat->stat == SAM_STAT_GOOD ||
	    ((stat->stat == SAM_STAT_CHECK_CONDITION &&
	      dev->sata_dev.command_set == ATAPI_COMMAND_SET))) {
		ata_tf_from_fis(resp->ending_fis, &dev->sata_dev.tf);

		if (!link->sactive) {
			qc->err_mask |= ac_err_mask(dev->sata_dev.tf.command);
		} else {
			link->eh_info.err_mask |= ac_err_mask(dev->sata_dev.tf.command);
			if (unlikely(link->eh_info.err_mask))
				qc->flags |= ATA_QCFLAG_FAILED;
		}
	} else {
		ac = sas_to_ata_err(stat);
		if (ac) {
			SAS_DPRINTK("%s: SAS error %x\n", __func__,
				    stat->stat);
			
			if (!link->sactive) {
				qc->err_mask = ac;
			} else {
				link->eh_info.err_mask |= AC_ERR_DEV;
				qc->flags |= ATA_QCFLAG_FAILED;
			}

			dev->sata_dev.tf.feature = 0x04; 
			dev->sata_dev.tf.command = ATA_ERR;
		}
	}

	qc->lldd_task = NULL;
	ata_qc_complete(qc);
	spin_unlock_irqrestore(ap->lock, flags);

qc_already_gone:
	list_del_init(&task->list);
	sas_free_task(task);
}