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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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4
include/linux/libata.h
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@ -772,8 +772,8 @@ struct ata_port_operations {
/*
* Optional features
*/
int (*scr_read)(struct ata_port *ap, unsigned int sc_reg, u32 *val);
int (*scr_write)(struct ata_port *ap, unsigned int sc_reg, u32 val);
int (*scr_read)(struct ata_link *link, unsigned int sc_reg, u32 *val);
int (*scr_write)(struct ata_link *link, unsigned int sc_reg, u32 val);
void (*pmp_attach)(struct ata_port *ap);
void (*pmp_detach)(struct ata_port *ap);
int (*enable_pm)(struct ata_port *ap, enum link_pm policy);