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858 lines
21 KiB
858 lines
21 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Support for SATA devices on Serial Attached SCSI (SAS) controllers |
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* |
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* Copyright (C) 2006 IBM Corporation |
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* |
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* Written by: Darrick J. Wong <[email protected]>, IBM Corporation |
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*/ |
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|
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#include <linux/scatterlist.h> |
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#include <linux/slab.h> |
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#include <linux/async.h> |
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#include <linux/export.h> |
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#include <scsi/sas_ata.h> |
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#include "sas_internal.h" |
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#include <scsi/scsi_host.h> |
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#include <scsi/scsi_device.h> |
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#include <scsi/scsi_tcq.h> |
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#include <scsi/scsi.h> |
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#include <scsi/scsi_transport.h> |
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#include <scsi/scsi_transport_sas.h> |
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#include "scsi_sas_internal.h" |
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#include "scsi_transport_api.h" |
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#include <scsi/scsi_eh.h> |
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|
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static enum ata_completion_errors sas_to_ata_err(struct task_status_struct *ts) |
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{ |
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/* Cheesy attempt to translate SAS errors into ATA. Hah! */ |
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|
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/* transport error */ |
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if (ts->resp == SAS_TASK_UNDELIVERED) |
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return AC_ERR_ATA_BUS; |
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|
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/* ts->resp == SAS_TASK_COMPLETE */ |
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/* task delivered, what happened afterwards? */ |
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switch (ts->stat) { |
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case SAS_DEV_NO_RESPONSE: |
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return AC_ERR_TIMEOUT; |
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case SAS_INTERRUPTED: |
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case SAS_PHY_DOWN: |
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case SAS_NAK_R_ERR: |
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return AC_ERR_ATA_BUS; |
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case SAS_DATA_UNDERRUN: |
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/* |
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* Some programs that use the taskfile interface |
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* (smartctl in particular) can cause underrun |
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* problems. Ignore these errors, perhaps at our |
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* peril. |
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*/ |
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return 0; |
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case SAS_DATA_OVERRUN: |
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case SAS_QUEUE_FULL: |
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case SAS_DEVICE_UNKNOWN: |
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case SAS_SG_ERR: |
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return AC_ERR_INVALID; |
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case SAS_OPEN_TO: |
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case SAS_OPEN_REJECT: |
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pr_warn("%s: Saw error %d. What to do?\n", |
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__func__, ts->stat); |
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return AC_ERR_OTHER; |
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case SAM_STAT_CHECK_CONDITION: |
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case SAS_ABORTED_TASK: |
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return AC_ERR_DEV; |
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case SAS_PROTO_RESPONSE: |
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/* This means the ending_fis has the error |
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* value; return 0 here to collect it |
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*/ |
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return 0; |
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default: |
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return 0; |
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} |
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} |
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static void sas_ata_task_done(struct sas_task *task) |
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{ |
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struct ata_queued_cmd *qc = task->uldd_task; |
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struct domain_device *dev = task->dev; |
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struct task_status_struct *stat = &task->task_status; |
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struct ata_task_resp *resp = (struct ata_task_resp *)stat->buf; |
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struct sas_ha_struct *sas_ha = dev->port->ha; |
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enum ata_completion_errors ac; |
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unsigned long flags; |
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struct ata_link *link; |
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struct ata_port *ap; |
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spin_lock_irqsave(&dev->done_lock, flags); |
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if (test_bit(SAS_HA_FROZEN, &sas_ha->state)) |
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task = NULL; |
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else if (qc && qc->scsicmd) |
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ASSIGN_SAS_TASK(qc->scsicmd, NULL); |
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spin_unlock_irqrestore(&dev->done_lock, flags); |
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/* check if libsas-eh got to the task before us */ |
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if (unlikely(!task)) |
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return; |
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if (!qc) |
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goto qc_already_gone; |
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ap = qc->ap; |
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link = &ap->link; |
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spin_lock_irqsave(ap->lock, flags); |
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/* check if we lost the race with libata/sas_ata_post_internal() */ |
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if (unlikely(ap->pflags & ATA_PFLAG_FROZEN)) { |
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spin_unlock_irqrestore(ap->lock, flags); |
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if (qc->scsicmd) |
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goto qc_already_gone; |
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else { |
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/* if eh is not involved and the port is frozen then the |
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* ata internal abort process has taken responsibility |
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* for this sas_task |
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*/ |
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return; |
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} |
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} |
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if (stat->stat == SAS_PROTO_RESPONSE || |
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stat->stat == SAS_SAM_STAT_GOOD || |
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(stat->stat == SAS_SAM_STAT_CHECK_CONDITION && |
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dev->sata_dev.class == ATA_DEV_ATAPI)) { |
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memcpy(dev->sata_dev.fis, resp->ending_fis, ATA_RESP_FIS_SIZE); |
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if (!link->sactive) { |
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qc->err_mask |= ac_err_mask(dev->sata_dev.fis[2]); |
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} else { |
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link->eh_info.err_mask |= ac_err_mask(dev->sata_dev.fis[2]); |
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if (unlikely(link->eh_info.err_mask)) |
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qc->flags |= ATA_QCFLAG_FAILED; |
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} |
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} else { |
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ac = sas_to_ata_err(stat); |
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if (ac) { |
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pr_warn("%s: SAS error 0x%x\n", __func__, stat->stat); |
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/* We saw a SAS error. Send a vague error. */ |
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if (!link->sactive) { |
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qc->err_mask = ac; |
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} else { |
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link->eh_info.err_mask |= AC_ERR_DEV; |
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qc->flags |= ATA_QCFLAG_FAILED; |
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} |
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dev->sata_dev.fis[3] = 0x04; /* status err */ |
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dev->sata_dev.fis[2] = ATA_ERR; |
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} |
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} |
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qc->lldd_task = NULL; |
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ata_qc_complete(qc); |
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spin_unlock_irqrestore(ap->lock, flags); |
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qc_already_gone: |
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sas_free_task(task); |
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} |
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static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc) |
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__must_hold(ap->lock) |
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{ |
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struct sas_task *task; |
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struct scatterlist *sg; |
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int ret = AC_ERR_SYSTEM; |
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unsigned int si, xfer = 0; |
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struct ata_port *ap = qc->ap; |
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struct domain_device *dev = ap->private_data; |
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struct sas_ha_struct *sas_ha = dev->port->ha; |
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struct Scsi_Host *host = sas_ha->core.shost; |
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struct sas_internal *i = to_sas_internal(host->transportt); |
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/* TODO: we should try to remove that unlock */ |
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spin_unlock(ap->lock); |
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/* If the device fell off, no sense in issuing commands */ |
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if (test_bit(SAS_DEV_GONE, &dev->state)) |
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goto out; |
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task = sas_alloc_task(GFP_ATOMIC); |
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if (!task) |
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goto out; |
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task->dev = dev; |
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task->task_proto = SAS_PROTOCOL_STP; |
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task->task_done = sas_ata_task_done; |
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if (qc->tf.command == ATA_CMD_FPDMA_WRITE || |
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qc->tf.command == ATA_CMD_FPDMA_READ || |
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qc->tf.command == ATA_CMD_FPDMA_RECV || |
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qc->tf.command == ATA_CMD_FPDMA_SEND || |
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qc->tf.command == ATA_CMD_NCQ_NON_DATA) { |
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/* Need to zero out the tag libata assigned us */ |
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qc->tf.nsect = 0; |
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} |
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ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, (u8 *)&task->ata_task.fis); |
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task->uldd_task = qc; |
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if (ata_is_atapi(qc->tf.protocol)) { |
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memcpy(task->ata_task.atapi_packet, qc->cdb, qc->dev->cdb_len); |
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task->total_xfer_len = qc->nbytes; |
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task->num_scatter = qc->n_elem; |
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task->data_dir = qc->dma_dir; |
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} else if (qc->tf.protocol == ATA_PROT_NODATA) { |
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task->data_dir = DMA_NONE; |
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} else { |
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for_each_sg(qc->sg, sg, qc->n_elem, si) |
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xfer += sg_dma_len(sg); |
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task->total_xfer_len = xfer; |
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task->num_scatter = si; |
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task->data_dir = qc->dma_dir; |
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} |
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task->scatter = qc->sg; |
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task->ata_task.retry_count = 1; |
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task->task_state_flags = SAS_TASK_STATE_PENDING; |
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qc->lldd_task = task; |
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task->ata_task.use_ncq = ata_is_ncq(qc->tf.protocol); |
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task->ata_task.dma_xfer = ata_is_dma(qc->tf.protocol); |
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if (qc->scsicmd) |
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ASSIGN_SAS_TASK(qc->scsicmd, task); |
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ret = i->dft->lldd_execute_task(task, GFP_ATOMIC); |
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if (ret) { |
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pr_debug("lldd_execute_task returned: %d\n", ret); |
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if (qc->scsicmd) |
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ASSIGN_SAS_TASK(qc->scsicmd, NULL); |
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sas_free_task(task); |
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qc->lldd_task = NULL; |
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ret = AC_ERR_SYSTEM; |
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} |
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out: |
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spin_lock(ap->lock); |
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return ret; |
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} |
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static bool sas_ata_qc_fill_rtf(struct ata_queued_cmd *qc) |
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{ |
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struct domain_device *dev = qc->ap->private_data; |
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ata_tf_from_fis(dev->sata_dev.fis, &qc->result_tf); |
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return true; |
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} |
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static struct sas_internal *dev_to_sas_internal(struct domain_device *dev) |
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{ |
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return to_sas_internal(dev->port->ha->core.shost->transportt); |
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} |
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static int sas_get_ata_command_set(struct domain_device *dev); |
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int sas_get_ata_info(struct domain_device *dev, struct ex_phy *phy) |
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{ |
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if (phy->attached_tproto & SAS_PROTOCOL_STP) |
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dev->tproto = phy->attached_tproto; |
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if (phy->attached_sata_dev) |
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dev->tproto |= SAS_SATA_DEV; |
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if (phy->attached_dev_type == SAS_SATA_PENDING) |
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dev->dev_type = SAS_SATA_PENDING; |
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else { |
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int res; |
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dev->dev_type = SAS_SATA_DEV; |
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res = sas_get_report_phy_sata(dev->parent, phy->phy_id, |
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&dev->sata_dev.rps_resp); |
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if (res) { |
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pr_debug("report phy sata to %016llx:%02d returned 0x%x\n", |
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SAS_ADDR(dev->parent->sas_addr), |
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phy->phy_id, res); |
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return res; |
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} |
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memcpy(dev->frame_rcvd, &dev->sata_dev.rps_resp.rps.fis, |
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sizeof(struct dev_to_host_fis)); |
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dev->sata_dev.class = sas_get_ata_command_set(dev); |
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} |
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return 0; |
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} |
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static int sas_ata_clear_pending(struct domain_device *dev, struct ex_phy *phy) |
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{ |
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int res; |
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/* we weren't pending, so successfully end the reset sequence now */ |
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if (dev->dev_type != SAS_SATA_PENDING) |
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return 1; |
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/* hmmm, if this succeeds do we need to repost the domain_device to the |
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* lldd so it can pick up new parameters? |
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*/ |
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res = sas_get_ata_info(dev, phy); |
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if (res) |
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return 0; /* retry */ |
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else |
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return 1; |
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} |
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static int smp_ata_check_ready(struct ata_link *link) |
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{ |
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int res; |
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struct ata_port *ap = link->ap; |
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struct domain_device *dev = ap->private_data; |
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struct domain_device *ex_dev = dev->parent; |
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struct sas_phy *phy = sas_get_local_phy(dev); |
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struct ex_phy *ex_phy = &ex_dev->ex_dev.ex_phy[phy->number]; |
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res = sas_ex_phy_discover(ex_dev, phy->number); |
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sas_put_local_phy(phy); |
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/* break the wait early if the expander is unreachable, |
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* otherwise keep polling |
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*/ |
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if (res == -ECOMM) |
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return res; |
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if (res != SMP_RESP_FUNC_ACC) |
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return 0; |
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switch (ex_phy->attached_dev_type) { |
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case SAS_SATA_PENDING: |
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return 0; |
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case SAS_END_DEVICE: |
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if (ex_phy->attached_sata_dev) |
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return sas_ata_clear_pending(dev, ex_phy); |
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fallthrough; |
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default: |
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return -ENODEV; |
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} |
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} |
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static int local_ata_check_ready(struct ata_link *link) |
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{ |
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struct ata_port *ap = link->ap; |
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struct domain_device *dev = ap->private_data; |
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struct sas_internal *i = dev_to_sas_internal(dev); |
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if (i->dft->lldd_ata_check_ready) |
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return i->dft->lldd_ata_check_ready(dev); |
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else { |
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/* lldd's that don't implement 'ready' checking get the |
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* old default behavior of not coordinating reset |
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* recovery with libata |
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*/ |
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return 1; |
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} |
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} |
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static int sas_ata_printk(const char *level, const struct domain_device *ddev, |
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const char *fmt, ...) |
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{ |
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struct ata_port *ap = ddev->sata_dev.ap; |
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struct device *dev = &ddev->rphy->dev; |
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struct va_format vaf; |
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va_list args; |
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int r; |
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va_start(args, fmt); |
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vaf.fmt = fmt; |
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vaf.va = &args; |
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r = printk("%s" SAS_FMT "ata%u: %s: %pV", |
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level, ap->print_id, dev_name(dev), &vaf); |
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va_end(args); |
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return r; |
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} |
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static int sas_ata_hard_reset(struct ata_link *link, unsigned int *class, |
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unsigned long deadline) |
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{ |
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int ret = 0, res; |
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struct sas_phy *phy; |
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struct ata_port *ap = link->ap; |
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int (*check_ready)(struct ata_link *link); |
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struct domain_device *dev = ap->private_data; |
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struct sas_internal *i = dev_to_sas_internal(dev); |
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res = i->dft->lldd_I_T_nexus_reset(dev); |
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if (res == -ENODEV) |
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return res; |
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if (res != TMF_RESP_FUNC_COMPLETE) |
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sas_ata_printk(KERN_DEBUG, dev, "Unable to reset ata device?\n"); |
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phy = sas_get_local_phy(dev); |
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if (scsi_is_sas_phy_local(phy)) |
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check_ready = local_ata_check_ready; |
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else |
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check_ready = smp_ata_check_ready; |
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sas_put_local_phy(phy); |
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ret = ata_wait_after_reset(link, deadline, check_ready); |
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if (ret && ret != -EAGAIN) |
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sas_ata_printk(KERN_ERR, dev, "reset failed (errno=%d)\n", ret); |
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*class = dev->sata_dev.class; |
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ap->cbl = ATA_CBL_SATA; |
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return ret; |
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} |
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/* |
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* notify the lldd to forget the sas_task for this internal ata command |
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* that bypasses scsi-eh |
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*/ |
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static void sas_ata_internal_abort(struct sas_task *task) |
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{ |
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struct sas_internal *si = dev_to_sas_internal(task->dev); |
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unsigned long flags; |
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int res; |
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spin_lock_irqsave(&task->task_state_lock, flags); |
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if (task->task_state_flags & SAS_TASK_STATE_ABORTED || |
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task->task_state_flags & SAS_TASK_STATE_DONE) { |
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spin_unlock_irqrestore(&task->task_state_lock, flags); |
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pr_debug("%s: Task %p already finished.\n", __func__, task); |
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goto out; |
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} |
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task->task_state_flags |= SAS_TASK_STATE_ABORTED; |
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spin_unlock_irqrestore(&task->task_state_lock, flags); |
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res = si->dft->lldd_abort_task(task); |
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spin_lock_irqsave(&task->task_state_lock, flags); |
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if (task->task_state_flags & SAS_TASK_STATE_DONE || |
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res == TMF_RESP_FUNC_COMPLETE) { |
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spin_unlock_irqrestore(&task->task_state_lock, flags); |
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goto out; |
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} |
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|
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/* XXX we are not prepared to deal with ->lldd_abort_task() |
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* failures. TODO: lldds need to unconditionally forget about |
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* aborted ata tasks, otherwise we (likely) leak the sas task |
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* here |
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*/ |
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pr_warn("%s: Task %p leaked.\n", __func__, task); |
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|
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if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) |
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task->task_state_flags &= ~SAS_TASK_STATE_ABORTED; |
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spin_unlock_irqrestore(&task->task_state_lock, flags); |
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return; |
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out: |
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sas_free_task(task); |
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} |
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static void sas_ata_post_internal(struct ata_queued_cmd *qc) |
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{ |
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if (qc->flags & ATA_QCFLAG_FAILED) |
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qc->err_mask |= AC_ERR_OTHER; |
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|
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if (qc->err_mask) { |
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/* |
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* Find the sas_task and kill it. By this point, libata |
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* has decided to kill the qc and has frozen the port. |
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* In this state sas_ata_task_done() will no longer free |
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* the sas_task, so we need to notify the lldd (via |
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* ->lldd_abort_task) that the task is dead and free it |
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* ourselves. |
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*/ |
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struct sas_task *task = qc->lldd_task; |
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qc->lldd_task = NULL; |
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if (!task) |
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return; |
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task->uldd_task = NULL; |
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sas_ata_internal_abort(task); |
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} |
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} |
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static void sas_ata_set_dmamode(struct ata_port *ap, struct ata_device *ata_dev) |
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{ |
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struct domain_device *dev = ap->private_data; |
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struct sas_internal *i = dev_to_sas_internal(dev); |
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|
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if (i->dft->lldd_ata_set_dmamode) |
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i->dft->lldd_ata_set_dmamode(dev); |
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} |
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|
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static void sas_ata_sched_eh(struct ata_port *ap) |
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{ |
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struct domain_device *dev = ap->private_data; |
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struct sas_ha_struct *ha = dev->port->ha; |
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unsigned long flags; |
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spin_lock_irqsave(&ha->lock, flags); |
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if (!test_and_set_bit(SAS_DEV_EH_PENDING, &dev->state)) |
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ha->eh_active++; |
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ata_std_sched_eh(ap); |
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spin_unlock_irqrestore(&ha->lock, flags); |
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} |
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void sas_ata_end_eh(struct ata_port *ap) |
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{ |
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struct domain_device *dev = ap->private_data; |
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struct sas_ha_struct *ha = dev->port->ha; |
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unsigned long flags; |
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spin_lock_irqsave(&ha->lock, flags); |
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if (test_and_clear_bit(SAS_DEV_EH_PENDING, &dev->state)) |
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ha->eh_active--; |
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spin_unlock_irqrestore(&ha->lock, flags); |
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} |
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static int sas_ata_prereset(struct ata_link *link, unsigned long deadline) |
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{ |
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struct ata_port *ap = link->ap; |
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struct domain_device *dev = ap->private_data; |
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struct sas_phy *local_phy = sas_get_local_phy(dev); |
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int res = 0; |
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|
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if (!local_phy->enabled || test_bit(SAS_DEV_GONE, &dev->state)) |
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res = -ENOENT; |
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sas_put_local_phy(local_phy); |
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return res; |
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} |
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|
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static struct ata_port_operations sas_sata_ops = { |
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.prereset = sas_ata_prereset, |
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.hardreset = sas_ata_hard_reset, |
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.error_handler = ata_std_error_handler, |
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.post_internal_cmd = sas_ata_post_internal, |
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.qc_defer = ata_std_qc_defer, |
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.qc_prep = ata_noop_qc_prep, |
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.qc_issue = sas_ata_qc_issue, |
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.qc_fill_rtf = sas_ata_qc_fill_rtf, |
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.port_start = ata_sas_port_start, |
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.port_stop = ata_sas_port_stop, |
|
.set_dmamode = sas_ata_set_dmamode, |
|
.sched_eh = sas_ata_sched_eh, |
|
.end_eh = sas_ata_end_eh, |
|
}; |
|
|
|
static struct ata_port_info sata_port_info = { |
|
.flags = ATA_FLAG_SATA | ATA_FLAG_PIO_DMA | ATA_FLAG_NCQ | |
|
ATA_FLAG_SAS_HOST | ATA_FLAG_FPDMA_AUX, |
|
.pio_mask = ATA_PIO4, |
|
.mwdma_mask = ATA_MWDMA2, |
|
.udma_mask = ATA_UDMA6, |
|
.port_ops = &sas_sata_ops |
|
}; |
|
|
|
int sas_ata_init(struct domain_device *found_dev) |
|
{ |
|
struct sas_ha_struct *ha = found_dev->port->ha; |
|
struct Scsi_Host *shost = ha->core.shost; |
|
struct ata_host *ata_host; |
|
struct ata_port *ap; |
|
int rc; |
|
|
|
ata_host = kzalloc(sizeof(*ata_host), GFP_KERNEL); |
|
if (!ata_host) { |
|
pr_err("ata host alloc failed.\n"); |
|
return -ENOMEM; |
|
} |
|
|
|
ata_host_init(ata_host, ha->dev, &sas_sata_ops); |
|
|
|
ap = ata_sas_port_alloc(ata_host, &sata_port_info, shost); |
|
if (!ap) { |
|
pr_err("ata_sas_port_alloc failed.\n"); |
|
rc = -ENODEV; |
|
goto free_host; |
|
} |
|
|
|
ap->private_data = found_dev; |
|
ap->cbl = ATA_CBL_SATA; |
|
ap->scsi_host = shost; |
|
rc = ata_sas_port_init(ap); |
|
if (rc) |
|
goto destroy_port; |
|
|
|
rc = ata_sas_tport_add(ata_host->dev, ap); |
|
if (rc) |
|
goto destroy_port; |
|
|
|
found_dev->sata_dev.ata_host = ata_host; |
|
found_dev->sata_dev.ap = ap; |
|
|
|
return 0; |
|
|
|
destroy_port: |
|
ata_sas_port_destroy(ap); |
|
free_host: |
|
ata_host_put(ata_host); |
|
return rc; |
|
} |
|
|
|
void sas_ata_task_abort(struct sas_task *task) |
|
{ |
|
struct ata_queued_cmd *qc = task->uldd_task; |
|
struct completion *waiting; |
|
|
|
/* Bounce SCSI-initiated commands to the SCSI EH */ |
|
if (qc->scsicmd) { |
|
blk_abort_request(scsi_cmd_to_rq(qc->scsicmd)); |
|
return; |
|
} |
|
|
|
/* Internal command, fake a timeout and complete. */ |
|
qc->flags &= ~ATA_QCFLAG_ACTIVE; |
|
qc->flags |= ATA_QCFLAG_FAILED; |
|
qc->err_mask |= AC_ERR_TIMEOUT; |
|
waiting = qc->private_data; |
|
complete(waiting); |
|
} |
|
|
|
static int sas_get_ata_command_set(struct domain_device *dev) |
|
{ |
|
struct dev_to_host_fis *fis = |
|
(struct dev_to_host_fis *) dev->frame_rcvd; |
|
struct ata_taskfile tf; |
|
|
|
if (dev->dev_type == SAS_SATA_PENDING) |
|
return ATA_DEV_UNKNOWN; |
|
|
|
ata_tf_from_fis((const u8 *)fis, &tf); |
|
|
|
return ata_dev_classify(&tf); |
|
} |
|
|
|
void sas_probe_sata(struct asd_sas_port *port) |
|
{ |
|
struct domain_device *dev, *n; |
|
|
|
mutex_lock(&port->ha->disco_mutex); |
|
list_for_each_entry(dev, &port->disco_list, disco_list_node) { |
|
if (!dev_is_sata(dev)) |
|
continue; |
|
|
|
ata_sas_async_probe(dev->sata_dev.ap); |
|
} |
|
mutex_unlock(&port->ha->disco_mutex); |
|
|
|
list_for_each_entry_safe(dev, n, &port->disco_list, disco_list_node) { |
|
if (!dev_is_sata(dev)) |
|
continue; |
|
|
|
sas_ata_wait_eh(dev); |
|
|
|
/* if libata could not bring the link up, don't surface |
|
* the device |
|
*/ |
|
if (!ata_dev_enabled(sas_to_ata_dev(dev))) |
|
sas_fail_probe(dev, __func__, -ENODEV); |
|
} |
|
|
|
} |
|
|
|
static void sas_ata_flush_pm_eh(struct asd_sas_port *port, const char *func) |
|
{ |
|
struct domain_device *dev, *n; |
|
|
|
list_for_each_entry_safe(dev, n, &port->dev_list, dev_list_node) { |
|
if (!dev_is_sata(dev)) |
|
continue; |
|
|
|
sas_ata_wait_eh(dev); |
|
|
|
/* if libata failed to power manage the device, tear it down */ |
|
if (ata_dev_disabled(sas_to_ata_dev(dev))) |
|
sas_fail_probe(dev, func, -ENODEV); |
|
} |
|
} |
|
|
|
void sas_suspend_sata(struct asd_sas_port *port) |
|
{ |
|
struct domain_device *dev; |
|
|
|
mutex_lock(&port->ha->disco_mutex); |
|
list_for_each_entry(dev, &port->dev_list, dev_list_node) { |
|
struct sata_device *sata; |
|
|
|
if (!dev_is_sata(dev)) |
|
continue; |
|
|
|
sata = &dev->sata_dev; |
|
if (sata->ap->pm_mesg.event == PM_EVENT_SUSPEND) |
|
continue; |
|
|
|
ata_sas_port_suspend(sata->ap); |
|
} |
|
mutex_unlock(&port->ha->disco_mutex); |
|
|
|
sas_ata_flush_pm_eh(port, __func__); |
|
} |
|
|
|
void sas_resume_sata(struct asd_sas_port *port) |
|
{ |
|
struct domain_device *dev; |
|
|
|
mutex_lock(&port->ha->disco_mutex); |
|
list_for_each_entry(dev, &port->dev_list, dev_list_node) { |
|
struct sata_device *sata; |
|
|
|
if (!dev_is_sata(dev)) |
|
continue; |
|
|
|
sata = &dev->sata_dev; |
|
if (sata->ap->pm_mesg.event == PM_EVENT_ON) |
|
continue; |
|
|
|
ata_sas_port_resume(sata->ap); |
|
} |
|
mutex_unlock(&port->ha->disco_mutex); |
|
|
|
sas_ata_flush_pm_eh(port, __func__); |
|
} |
|
|
|
/** |
|
* sas_discover_sata - discover an STP/SATA domain device |
|
* @dev: pointer to struct domain_device of interest |
|
* |
|
* Devices directly attached to a HA port, have no parents. All other |
|
* devices do, and should have their "parent" pointer set appropriately |
|
* before calling this function. |
|
*/ |
|
int sas_discover_sata(struct domain_device *dev) |
|
{ |
|
if (dev->dev_type == SAS_SATA_PM) |
|
return -ENODEV; |
|
|
|
dev->sata_dev.class = sas_get_ata_command_set(dev); |
|
sas_fill_in_rphy(dev, dev->rphy); |
|
|
|
return sas_notify_lldd_dev_found(dev); |
|
} |
|
|
|
static void async_sas_ata_eh(void *data, async_cookie_t cookie) |
|
{ |
|
struct domain_device *dev = data; |
|
struct ata_port *ap = dev->sata_dev.ap; |
|
struct sas_ha_struct *ha = dev->port->ha; |
|
|
|
sas_ata_printk(KERN_DEBUG, dev, "dev error handler\n"); |
|
ata_scsi_port_error_handler(ha->core.shost, ap); |
|
sas_put_device(dev); |
|
} |
|
|
|
void sas_ata_strategy_handler(struct Scsi_Host *shost) |
|
{ |
|
struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost); |
|
ASYNC_DOMAIN_EXCLUSIVE(async); |
|
int i; |
|
|
|
/* it's ok to defer revalidation events during ata eh, these |
|
* disks are in one of three states: |
|
* 1/ present for initial domain discovery, and these |
|
* resets will cause bcn flutters |
|
* 2/ hot removed, we'll discover that after eh fails |
|
* 3/ hot added after initial discovery, lost the race, and need |
|
* to catch the next train. |
|
*/ |
|
sas_disable_revalidation(sas_ha); |
|
|
|
spin_lock_irq(&sas_ha->phy_port_lock); |
|
for (i = 0; i < sas_ha->num_phys; i++) { |
|
struct asd_sas_port *port = sas_ha->sas_port[i]; |
|
struct domain_device *dev; |
|
|
|
spin_lock(&port->dev_list_lock); |
|
list_for_each_entry(dev, &port->dev_list, dev_list_node) { |
|
if (!dev_is_sata(dev)) |
|
continue; |
|
|
|
/* hold a reference over eh since we may be |
|
* racing with final remove once all commands |
|
* are completed |
|
*/ |
|
kref_get(&dev->kref); |
|
|
|
async_schedule_domain(async_sas_ata_eh, dev, &async); |
|
} |
|
spin_unlock(&port->dev_list_lock); |
|
} |
|
spin_unlock_irq(&sas_ha->phy_port_lock); |
|
|
|
async_synchronize_full_domain(&async); |
|
|
|
sas_enable_revalidation(sas_ha); |
|
} |
|
|
|
void sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q, |
|
struct list_head *done_q) |
|
{ |
|
struct scsi_cmnd *cmd, *n; |
|
struct domain_device *eh_dev; |
|
|
|
do { |
|
LIST_HEAD(sata_q); |
|
eh_dev = NULL; |
|
|
|
list_for_each_entry_safe(cmd, n, work_q, eh_entry) { |
|
struct domain_device *ddev = cmd_to_domain_dev(cmd); |
|
|
|
if (!dev_is_sata(ddev) || TO_SAS_TASK(cmd)) |
|
continue; |
|
if (eh_dev && eh_dev != ddev) |
|
continue; |
|
eh_dev = ddev; |
|
list_move(&cmd->eh_entry, &sata_q); |
|
} |
|
|
|
if (!list_empty(&sata_q)) { |
|
struct ata_port *ap = eh_dev->sata_dev.ap; |
|
|
|
sas_ata_printk(KERN_DEBUG, eh_dev, "cmd error handler\n"); |
|
ata_scsi_cmd_error_handler(shost, ap, &sata_q); |
|
/* |
|
* ata's error handler may leave the cmd on the list |
|
* so make sure they don't remain on a stack list |
|
* about to go out of scope. |
|
* |
|
* This looks strange, since the commands are |
|
* now part of no list, but the next error |
|
* action will be ata_port_error_handler() |
|
* which takes no list and sweeps them up |
|
* anyway from the ata tag array. |
|
*/ |
|
while (!list_empty(&sata_q)) |
|
list_del_init(sata_q.next); |
|
} |
|
} while (eh_dev); |
|
} |
|
|
|
void sas_ata_schedule_reset(struct domain_device *dev) |
|
{ |
|
struct ata_eh_info *ehi; |
|
struct ata_port *ap; |
|
unsigned long flags; |
|
|
|
if (!dev_is_sata(dev)) |
|
return; |
|
|
|
ap = dev->sata_dev.ap; |
|
ehi = &ap->link.eh_info; |
|
|
|
spin_lock_irqsave(ap->lock, flags); |
|
ehi->err_mask |= AC_ERR_TIMEOUT; |
|
ehi->action |= ATA_EH_RESET; |
|
ata_port_schedule_eh(ap); |
|
spin_unlock_irqrestore(ap->lock, flags); |
|
} |
|
EXPORT_SYMBOL_GPL(sas_ata_schedule_reset); |
|
|
|
void sas_ata_wait_eh(struct domain_device *dev) |
|
{ |
|
struct ata_port *ap; |
|
|
|
if (!dev_is_sata(dev)) |
|
return; |
|
|
|
ap = dev->sata_dev.ap; |
|
ata_port_wait_eh(ap); |
|
}
|
|
|