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| author | Dave Jiang <dave.jiang@intel.com> | 2011-05-24 13:18:04 -0700 |
|---|---|---|
| committer | James Bottomley <jbottomley@parallels.com> | 2011-05-26 22:49:33 -0500 |
| commit | 1ca1e43e55f4cd068f997154ffaf5fa62b08b802 (patch) | |
| tree | 8b705e0088fb362d030caf1eed88ba63e59b7c5e /drivers/scsi/libsas | |
| parent | 3673f4bf6a277f4f2944ad153ceb167b340f9ffc (diff) | |
| download | linux-1ca1e43e55f4cd068f997154ffaf5fa62b08b802.tar.gz linux-1ca1e43e55f4cd068f997154ffaf5fa62b08b802.tar.bz2 linux-1ca1e43e55f4cd068f997154ffaf5fa62b08b802.zip | |
[SCSI] libsas: Add option for SATA soft reset
This allows a libsas driver to optionally provide a soft reset handler
for libata to drive. The isci driver allows software to control the
assertion/deassertion of SRST.
[jejb: checkpatch.pl fixes]
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <jbottomley@parallels.com>
Diffstat (limited to 'drivers/scsi/libsas')
| -rw-r--r-- | drivers/scsi/libsas/sas_ata.c | 40 |
1 files changed, 39 insertions, 1 deletions
diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c index e99301421409..db9238f2ecb8 100644 --- a/drivers/scsi/libsas/sas_ata.c +++ b/drivers/scsi/libsas/sas_ata.c @@ -295,6 +295,44 @@ static int sas_ata_hard_reset(struct ata_link *link, unsigned int *class, return ret; } +static int sas_ata_soft_reset(struct ata_link *link, unsigned int *class, + unsigned long deadline) +{ + struct ata_port *ap = link->ap; + struct domain_device *dev = ap->private_data; + struct sas_internal *i = + to_sas_internal(dev->port->ha->core.shost->transportt); + int res = TMF_RESP_FUNC_FAILED; + int ret = 0; + + if (i->dft->lldd_ata_soft_reset) + res = i->dft->lldd_ata_soft_reset(dev); + + if (res != TMF_RESP_FUNC_COMPLETE) { + SAS_DPRINTK("%s: Unable to soft reset\n", __func__); + ret = -EAGAIN; + } + + switch (dev->sata_dev.command_set) { + case ATA_COMMAND_SET: + SAS_DPRINTK("%s: Found ATA device.\n", __func__); + *class = ATA_DEV_ATA; + break; + case ATAPI_COMMAND_SET: + SAS_DPRINTK("%s: Found ATAPI device.\n", __func__); + *class = ATA_DEV_ATAPI; + break; + default: + SAS_DPRINTK("%s: Unknown SATA command set: %d.\n", + __func__, dev->sata_dev.command_set); + *class = ATA_DEV_UNKNOWN; + break; + } + + ap->cbl = ATA_CBL_SATA; + return ret; +} + static void sas_ata_post_internal(struct ata_queued_cmd *qc) { if (qc->flags & ATA_QCFLAG_FAILED) @@ -325,7 +363,7 @@ static void sas_ata_post_internal(struct ata_queued_cmd *qc) static struct ata_port_operations sas_sata_ops = { .prereset = ata_std_prereset, - .softreset = NULL, + .softreset = sas_ata_soft_reset, .hardreset = sas_ata_hard_reset, .postreset = ata_std_postreset, .error_handler = ata_std_error_handler, |