![Dan Williams](/assets/img/avatar_default.png)
Tejun says: "At least for libata, worrying about suspend/resume failures don't make whole lot of sense. If suspend failed, just proceed with suspend. If the device can't be woken up afterwards, that's that. There isn't anything we could have done differently anyway. The same for resume, if spinup fails, the device is dud and the following commands will invoke EH actions and will eventually fail. Again, there really isn't any *choice* to make. Just making sure the errors are handled gracefully (ie. don't crash) and the following commands are handled correctly should be enough." The only libata user that actually cares about the result from a suspend operation is libsas. However, it only cares about whether queuing a new operation collides with an in-flight one. All libsas does with the error is retry, but we can just let libata wait for the previous operation before continuing. Other cleanups include: 1/ Unifying all ata port pm operations on an ata_port_pm_ prefix 2/ Marking all ata port pm helper routines as returning void, only ata_port_pm_ entry points need to fake a 0 return value. 3/ Killing ata_port_{suspend|resume}_common() in favor of calling ata_port_request_pm() directly 4/ Killing the wrappers that just do a to_ata_port() conversion 5/ Clearly marking the entry points that do async operations with an _async suffix. Reference: http://marc.info/?l=linux-scsi&m=138995409532286&w=2 Cc: Phillip Susi <psusi@ubuntu.com> Cc: Alan Stern <stern@rowland.harvard.edu> Suggested-by: Tejun Heo <tj@kernel.org> Signed-off-by: Todd Brandt <todd.e.brandt@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Tejun Heo <tj@kernel.org>
916 lines
23 KiB
C
916 lines
23 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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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_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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SAS_DPRINTK("%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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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 || stat->stat == SAM_STAT_GOOD ||
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((stat->stat == SAM_STAT_CHECK_CONDITION &&
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dev->sata_dev.command_set == ATAPI_COMMAND_SET))) {
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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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SAS_DPRINTK("%s: SAS error %x\n", __func__,
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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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list_del_init(&task->list);
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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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{
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unsigned long flags;
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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: audit callers to ensure they are ready for qc_issue to
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* unconditionally re-enable interrupts
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*/
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local_irq_save(flags);
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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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/* 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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} else {
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for_each_sg(qc->sg, sg, qc->n_elem, si)
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xfer += sg->length;
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task->total_xfer_len = xfer;
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task->num_scatter = si;
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}
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task->data_dir = qc->dma_dir;
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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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switch (qc->tf.protocol) {
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case ATA_PROT_NCQ:
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task->ata_task.use_ncq = 1;
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/* fall through */
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case ATAPI_PROT_DMA:
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case ATA_PROT_DMA:
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task->ata_task.dma_xfer = 1;
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break;
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}
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if (qc->scsicmd)
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ASSIGN_SAS_TASK(qc->scsicmd, task);
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if (sas_ha->lldd_max_execute_num < 2)
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ret = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC);
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else
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ret = sas_queue_up(task);
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/* Examine */
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if (ret) {
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SAS_DPRINTK("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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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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local_irq_restore(flags);
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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 void 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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SAS_DPRINTK("report phy sata to %016llx:0x%x returned "
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"0x%x\n", 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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/* TODO switch to ata_dev_classify() */
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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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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("%ssas: 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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/* XXX: if the class changes during the reset the upper layer
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* should be informed, if the device has gone away we assume
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* libsas will eventually delete it
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*/
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switch (dev->sata_dev.command_set) {
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case ATA_COMMAND_SET:
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*class = ATA_DEV_ATA;
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break;
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case ATAPI_COMMAND_SET:
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*class = ATA_DEV_ATAPI;
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break;
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}
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|
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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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/*
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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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|
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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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SAS_DPRINTK("%s: Task %p already finished.\n", __func__,
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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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|
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res = si->dft->lldd_abort_task(task);
|
|
|
|
spin_lock_irqsave(&task->task_state_lock, flags);
|
|
if (task->task_state_flags & SAS_TASK_STATE_DONE ||
|
|
res == TMF_RESP_FUNC_COMPLETE) {
|
|
spin_unlock_irqrestore(&task->task_state_lock, flags);
|
|
goto out;
|
|
}
|
|
|
|
/* XXX we are not prepared to deal with ->lldd_abort_task()
|
|
* failures. TODO: lldds need to unconditionally forget about
|
|
* aborted ata tasks, otherwise we (likely) leak the sas task
|
|
* here
|
|
*/
|
|
SAS_DPRINTK("%s: Task %p leaked.\n", __func__, task);
|
|
|
|
if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
|
|
task->task_state_flags &= ~SAS_TASK_STATE_ABORTED;
|
|
spin_unlock_irqrestore(&task->task_state_lock, flags);
|
|
|
|
return;
|
|
out:
|
|
list_del_init(&task->list);
|
|
sas_free_task(task);
|
|
}
|
|
|
|
static void sas_ata_post_internal(struct ata_queued_cmd *qc)
|
|
{
|
|
if (qc->flags & ATA_QCFLAG_FAILED)
|
|
qc->err_mask |= AC_ERR_OTHER;
|
|
|
|
if (qc->err_mask) {
|
|
/*
|
|
* Find the sas_task and kill it. By this point, libata
|
|
* has decided to kill the qc and has frozen the port.
|
|
* In this state sas_ata_task_done() will no longer free
|
|
* the sas_task, so we need to notify the lldd (via
|
|
* ->lldd_abort_task) that the task is dead and free it
|
|
* ourselves.
|
|
*/
|
|
struct sas_task *task = qc->lldd_task;
|
|
|
|
qc->lldd_task = NULL;
|
|
if (!task)
|
|
return;
|
|
task->uldd_task = NULL;
|
|
sas_ata_internal_abort(task);
|
|
}
|
|
}
|
|
|
|
|
|
static void sas_ata_set_dmamode(struct ata_port *ap, struct ata_device *ata_dev)
|
|
{
|
|
struct domain_device *dev = ap->private_data;
|
|
struct sas_internal *i = dev_to_sas_internal(dev);
|
|
|
|
if (i->dft->lldd_ata_set_dmamode)
|
|
i->dft->lldd_ata_set_dmamode(dev);
|
|
}
|
|
|
|
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 struct ata_port_operations sas_sata_ops = {
|
|
.prereset = ata_std_prereset,
|
|
.hardreset = sas_ata_hard_reset,
|
|
.postreset = ata_std_postreset,
|
|
.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,
|
|
.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_port *ap;
|
|
int rc;
|
|
|
|
ata_host_init(&found_dev->sata_dev.ata_host, ha->dev, &sas_sata_ops);
|
|
ap = ata_sas_port_alloc(&found_dev->sata_dev.ata_host,
|
|
&sata_port_info,
|
|
shost);
|
|
if (!ap) {
|
|
SAS_DPRINTK("ata_sas_port_alloc failed.\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
ap->private_data = found_dev;
|
|
ap->cbl = ATA_CBL_SATA;
|
|
ap->scsi_host = shost;
|
|
rc = ata_sas_port_init(ap);
|
|
if (rc) {
|
|
ata_sas_port_destroy(ap);
|
|
return rc;
|
|
}
|
|
found_dev->sata_dev.ap = ap;
|
|
|
|
return 0;
|
|
}
|
|
|
|
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) {
|
|
struct request_queue *q = qc->scsicmd->device->request_queue;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(q->queue_lock, flags);
|
|
blk_abort_request(qc->scsicmd->request);
|
|
spin_unlock_irqrestore(q->queue_lock, flags);
|
|
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 void sas_get_ata_command_set(struct domain_device *dev)
|
|
{
|
|
struct dev_to_host_fis *fis =
|
|
(struct dev_to_host_fis *) dev->frame_rcvd;
|
|
|
|
if (dev->dev_type == SAS_SATA_PENDING)
|
|
return;
|
|
|
|
if ((fis->sector_count == 1 && /* ATA */
|
|
fis->lbal == 1 &&
|
|
fis->lbam == 0 &&
|
|
fis->lbah == 0 &&
|
|
fis->device == 0)
|
|
||
|
|
(fis->sector_count == 0 && /* CE-ATA (mATA) */
|
|
fis->lbal == 0 &&
|
|
fis->lbam == 0xCE &&
|
|
fis->lbah == 0xAA &&
|
|
(fis->device & ~0x10) == 0))
|
|
|
|
dev->sata_dev.command_set = ATA_COMMAND_SET;
|
|
|
|
else if ((fis->interrupt_reason == 1 && /* ATAPI */
|
|
fis->lbal == 1 &&
|
|
fis->byte_count_low == 0x14 &&
|
|
fis->byte_count_high == 0xEB &&
|
|
(fis->device & ~0x10) == 0))
|
|
|
|
dev->sata_dev.command_set = ATAPI_COMMAND_SET;
|
|
|
|
else if ((fis->sector_count == 1 && /* SEMB */
|
|
fis->lbal == 1 &&
|
|
fis->lbam == 0x3C &&
|
|
fis->lbah == 0xC3 &&
|
|
fis->device == 0)
|
|
||
|
|
(fis->interrupt_reason == 1 && /* SATA PM */
|
|
fis->lbal == 1 &&
|
|
fis->byte_count_low == 0x69 &&
|
|
fis->byte_count_high == 0x96 &&
|
|
(fis->device & ~0x10) == 0))
|
|
|
|
/* Treat it as a superset? */
|
|
dev->sata_dev.command_set = ATAPI_COMMAND_SET;
|
|
}
|
|
|
|
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_disabled(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)
|
|
{
|
|
int res;
|
|
|
|
if (dev->dev_type == SAS_SATA_PM)
|
|
return -ENODEV;
|
|
|
|
sas_get_ata_command_set(dev);
|
|
sas_fill_in_rphy(dev, dev->rphy);
|
|
|
|
res = sas_notify_lldd_dev_found(dev);
|
|
if (res)
|
|
return res;
|
|
|
|
sas_discover_event(dev->port, DISCE_PROBE);
|
|
return 0;
|
|
}
|
|
|
|
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);
|
|
}
|