diff options
author | Tejun Heo <htejun@gmail.com> | 2008-04-07 22:47:22 +0900 |
---|---|---|
committer | Jeff Garzik <jgarzik@redhat.com> | 2008-04-17 15:44:25 -0400 |
commit | 071f44b1d2c051641b62a3571223314737ccbe59 (patch) | |
tree | a07794c8109e5d82a78223ae0159eadbf862c463 /include/linux/libata.h | |
parent | 48515f6c006c2a9d7b624ee8ad068018c2d3fe0e (diff) |
libata: implement PMP helpers
Implement helpers to test whether PMP is supported, attached and
determine pmp number to use when issuing SRST to a link. While at it,
move ata_is_host_link() so that it's together with the two new PMP
helpers.
This change simplifies LLDs and helps making PMP support optional.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Diffstat (limited to 'include/linux/libata.h')
-rw-r--r-- | include/linux/libata.h | 38 |
1 files changed, 29 insertions, 9 deletions
diff --git a/include/linux/libata.h b/include/linux/libata.h index eb86d6f3963..1908bf48474 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -1090,13 +1090,38 @@ extern const struct ata_port_operations sata_port_ops; .change_queue_depth = ata_scsi_change_queue_depth /* + * PMP helpers + */ +static inline bool sata_pmp_supported(struct ata_port *ap) +{ + return ap->flags & ATA_FLAG_PMP; +} + +static inline bool sata_pmp_attached(struct ata_port *ap) +{ + return ap->nr_pmp_links != 0; +} + +static inline int ata_is_host_link(const struct ata_link *link) +{ + return link == &link->ap->link; +} + +static inline int sata_srst_pmp(struct ata_link *link) +{ + if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) + return SATA_PMP_CTRL_PORT; + return link->pmp; +} + +/* * printk helpers */ #define ata_port_printk(ap, lv, fmt, args...) \ printk("%sata%u: "fmt, lv, (ap)->print_id , ##args) #define ata_link_printk(link, lv, fmt, args...) do { \ - if ((link)->ap->nr_pmp_links) \ + if (sata_pmp_attached((link)->ap)) \ printk("%sata%u.%02u: "fmt, lv, (link)->ap->print_id, \ (link)->pmp , ##args); \ else \ @@ -1182,11 +1207,6 @@ static inline unsigned int ata_dev_absent(const struct ata_device *dev) /* * link helpers */ -static inline int ata_is_host_link(const struct ata_link *link) -{ - return link == &link->ap->link; -} - static inline int ata_link_max_devices(const struct ata_link *link) { if (ata_is_host_link(link) && link->ap->flags & ATA_FLAG_SLAVE_POSS) @@ -1201,7 +1221,7 @@ static inline int ata_link_active(struct ata_link *link) static inline struct ata_link *ata_port_first_link(struct ata_port *ap) { - if (ap->nr_pmp_links) + if (sata_pmp_attached(ap)) return ap->pmp_link; return &ap->link; } @@ -1210,8 +1230,8 @@ static inline struct ata_link *ata_port_next_link(struct ata_link *link) { struct ata_port *ap = link->ap; - if (link == &ap->link) { - if (!ap->nr_pmp_links) + if (ata_is_host_link(link)) { + if (!sata_pmp_attached(ap)) return NULL; return ap->pmp_link; } |