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| author | Tejun Heo <tj@kernel.org> | 2010-09-01 17:50:07 +0200 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2010-10-22 02:21:04 +0200 |
| commit | 6c8ea89cecd780faa4f4c8ed8b3b6ab88f9fa841 (patch) | |
| tree | a38ecca3c52cd4ca021137086b39d7dcd8b042cc /drivers/ata/libata.h | |
| parent | libata: reimplement link power management (diff) | |
| download | linux-6c8ea89cecd780faa4f4c8ed8b3b6ab88f9fa841.tar.xz linux-6c8ea89cecd780faa4f4c8ed8b3b6ab88f9fa841.zip | |
libata: implement LPM support for port multipliers
Port multipliers can do DIPM on fan-out links fine. Implement support
for it. Tested w/ SIMG 57xx and marvell PMPs. Both the host and
fan-out links enter power save modes nicely.
SIMG 37xx and 47xx report link offline on SStatus causing EH to detach
the devices. Blacklisted.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to '')
| -rw-r--r-- | drivers/ata/libata.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h index 55a6f413a550..7c070a4b1c08 100644 --- a/drivers/ata/libata.h +++ b/drivers/ata/libata.h @@ -176,6 +176,8 @@ extern int ata_ering_map(struct ata_ering *ering, #ifdef CONFIG_SATA_PMP extern int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *val); extern int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val); +extern int sata_pmp_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, + unsigned hints); extern int sata_pmp_attach(struct ata_device *dev); #else /* CONFIG_SATA_PMP */ static inline int sata_pmp_scr_read(struct ata_link *link, int reg, u32 *val) @@ -188,6 +190,12 @@ static inline int sata_pmp_scr_write(struct ata_link *link, int reg, u32 val) return -EINVAL; } +static inline int sata_pmp_set_lpm(struct ata_link *link, + enum ata_lpm_policy policy, unsigned hints) +{ + return -EINVAL; +} + static inline int sata_pmp_attach(struct ata_device *dev) { return -EINVAL; |