libata-link: introduce ata_link
Introduce ata_link. It abstracts PHY and sits between ata_port and
ata_device. This new level of abstraction is necessary to support
SATA Port Multiplier, which basically adds a bunch of links (PHYs) to
a ATA host port. Fields related to command execution, spd_limit and
EH are per-link and thus moved to ata_link.
This patch only defines the host link. Multiple link handling will be
added later. Also, a lot of ap->link derefences are added but many of
them will be removed as each part is converted to deal directly with
ata_link instead of ata_port.
This patch introduces no behavior change.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: James Bottomley <James.Bottomley@SteelEye.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c
index 5e573ef..1d6503d 100644
--- a/drivers/scsi/libsas/sas_ata.c
+++ b/drivers/scsi/libsas/sas_ata.c
@@ -249,17 +249,17 @@
switch (dev->sata_dev.command_set) {
case ATA_COMMAND_SET:
SAS_DPRINTK("%s: Found ATA device.\n", __FUNCTION__);
- ap->device[0].class = ATA_DEV_ATA;
+ ap->link.device[0].class = ATA_DEV_ATA;
break;
case ATAPI_COMMAND_SET:
SAS_DPRINTK("%s: Found ATAPI device.\n", __FUNCTION__);
- ap->device[0].class = ATA_DEV_ATAPI;
+ ap->link.device[0].class = ATA_DEV_ATAPI;
break;
default:
SAS_DPRINTK("%s: Unknown SATA command set: %d.\n",
__FUNCTION__,
dev->sata_dev.command_set);
- ap->device[0].class = ATA_DEV_UNKNOWN;
+ ap->link.device[0].class = ATA_DEV_UNKNOWN;
break;
}
@@ -317,7 +317,7 @@
dev->sata_dev.serror = val;
break;
case SCR_ACTIVE:
- dev->sata_dev.ap->sactive = val;
+ dev->sata_dev.ap->link.sactive = val;
break;
default:
return -EINVAL;
@@ -342,7 +342,7 @@
*val = dev->sata_dev.serror;
return 0;
case SCR_ACTIVE:
- *val = dev->sata_dev.ap->sactive;
+ *val = dev->sata_dev.ap->link.sactive;
return 0;
default:
return -EINVAL;