From 1ca1e43e55f4cd068f997154ffaf5fa62b08b802 Mon Sep 17 00:00:00 2001 From: Dave Jiang Date: Tue, 24 May 2011 13:18:04 -0700 Subject: [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 Signed-off-by: Dan Williams Signed-off-by: James Bottomley --- drivers/scsi/libsas/sas_ata.c | 40 +++++++++++++++++++++++++++++++++++++++- 1 file changed, 39 insertions(+), 1 deletion(-) (limited to 'drivers/scsi') 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, -- cgit v1.2.3-58-ga151