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libata: make SCR access ops per-link

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Logically, SCR access ops should take @link; however, there was no
compelling reason to convert all SCR access ops when adding @link
abstraction as there's one-to-one mapping between a port and a non-PMP
link.  However, that assumption won't hold anymore with the scheduled
addition of slave link.

Make SCR access ops per-link.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Tejun Heo
2008-07-31 17:02:40 +09:00
committed by Jeff Garzik
parent 6ef190cc92
commit 82ef04fb4c
18 changed files with 153 additions and 141 deletions
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drivers/ata/sata_svw.c
+6 -4
View File
@@ -123,20 +123,22 @@ static int k2_sata_check_atapi_dma(struct ata_queued_cmd *qc)
}
}
static int k2_sata_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
static int k2_sata_scr_read(struct ata_link *link,
unsigned int sc_reg, u32 *val)
{
if (sc_reg > SCR_CONTROL)
return -EINVAL;
*val = readl(ap->ioaddr.scr_addr + (sc_reg * 4));
*val = readl(link->ap->ioaddr.scr_addr + (sc_reg * 4));
return 0;
}
static int k2_sata_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
static int k2_sata_scr_write(struct ata_link *link,
unsigned int sc_reg, u32 val)
{
if (sc_reg > SCR_CONTROL)
return -EINVAL;
writel(val, ap->ioaddr.scr_addr + (sc_reg * 4));
writel(val, link->ap->ioaddr.scr_addr + (sc_reg * 4));
return 0;
}