871 lines
22 KiB
C
871 lines
22 KiB
C
// 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 <djwong@us.ibm.com>, IBM Corporation
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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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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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/* 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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/* 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_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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/* For NCQ commands, zero out the tag libata assigned us */
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if (ata_is_ncq(qc->tf.protocol))
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qc->tf.nsect = 0;
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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 (!ata_is_data(qc->tf.protocol)) {
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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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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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int sas_ata_wait_after_reset(struct domain_device *dev, unsigned long deadline)
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{
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struct sata_device *sata_dev = &dev->sata_dev;
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int (*check_ready)(struct ata_link *link);
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struct ata_port *ap = sata_dev->ap;
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struct ata_link *link = &ap->link;
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struct sas_phy *phy;
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int ret;
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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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return ret;
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}
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EXPORT_SYMBOL_GPL(sas_ata_wait_after_reset);
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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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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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int ret;
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ret = i->dft->lldd_I_T_nexus_reset(dev);
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if (ret == -ENODEV)
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return ret;
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if (ret != TMF_RESP_FUNC_COMPLETE)
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sas_ata_printk(KERN_DEBUG, dev, "Unable to reset ata device?\n");
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ret = sas_ata_wait_after_reset(dev, deadline);
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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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/* 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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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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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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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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static void sas_ata_sched_eh(struct ata_port *ap)
|
|
{
|
|
struct domain_device *dev = ap->private_data;
|
|
struct sas_ha_struct *ha = dev->port->ha;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&ha->lock, flags);
|
|
if (!test_and_set_bit(SAS_DEV_EH_PENDING, &dev->state))
|
|
ha->eh_active++;
|
|
ata_std_sched_eh(ap);
|
|
spin_unlock_irqrestore(&ha->lock, flags);
|
|
}
|
|
|
|
void sas_ata_end_eh(struct ata_port *ap)
|
|
{
|
|
struct domain_device *dev = ap->private_data;
|
|
struct sas_ha_struct *ha = dev->port->ha;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&ha->lock, flags);
|
|
if (test_and_clear_bit(SAS_DEV_EH_PENDING, &dev->state))
|
|
ha->eh_active--;
|
|
spin_unlock_irqrestore(&ha->lock, flags);
|
|
}
|
|
|
|
static int sas_ata_prereset(struct ata_link *link, unsigned long deadline)
|
|
{
|
|
struct ata_port *ap = link->ap;
|
|
struct domain_device *dev = ap->private_data;
|
|
struct sas_phy *local_phy = sas_get_local_phy(dev);
|
|
int res = 0;
|
|
|
|
if (!local_phy->enabled || test_bit(SAS_DEV_GONE, &dev->state))
|
|
res = -ENOENT;
|
|
sas_put_local_phy(local_phy);
|
|
|
|
return res;
|
|
}
|
|
|
|
static struct ata_port_operations sas_sata_ops = {
|
|
.prereset = sas_ata_prereset,
|
|
.hardreset = sas_ata_hard_reset,
|
|
.error_handler = ata_std_error_handler,
|
|
.post_internal_cmd = sas_ata_post_internal,
|
|
.qc_defer = ata_std_qc_defer,
|
|
.qc_prep = ata_noop_qc_prep,
|
|
.qc_issue = sas_ata_qc_issue,
|
|
.qc_fill_rtf = sas_ata_qc_fill_rtf,
|
|
.port_start = ata_sas_port_start,
|
|
.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 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);
|
|
}
|
|
|
|
int sas_execute_ata_cmd(struct domain_device *device, u8 *fis, int force_phy_id)
|
|
{
|
|
struct sas_tmf_task tmf_task = {};
|
|
return sas_execute_tmf(device, fis, sizeof(struct host_to_dev_fis),
|
|
force_phy_id, &tmf_task);
|
|
}
|
|
EXPORT_SYMBOL_GPL(sas_execute_ata_cmd);
|