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| author | Tejun Heo <htejun@gmail.com> | 2007-08-06 18:36:22 +0900 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-10-12 14:55:30 -0400 |
| commit | 9af5c9c97dc9d599281778864c72b385f0c63341 (patch) | |
| tree | 8359986bd42c4a9a5b1993078aa9ee4c7971ac3d /include | |
| parent | 640fdb504941fa2b9f6f274716fc9f97f2bf6bff (diff) | |
| download | linux-9af5c9c97dc9d599281778864c72b385f0c63341.tar.gz linux-9af5c9c97dc9d599281778864c72b385f0c63341.tar.bz2 linux-9af5c9c97dc9d599281778864c72b385f0c63341.zip | |
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>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/libata.h | 40 |
1 files changed, 25 insertions, 15 deletions
diff --git a/include/linux/libata.h b/include/linux/libata.h index a67bb9075e9b..ca4493125fa0 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -436,7 +436,7 @@ struct ata_ering { }; struct ata_device { - struct ata_port *ap; + struct ata_link *link; unsigned int devno; /* 0 or 1 */ unsigned long flags; /* ATA_DFLAG_xxx */ unsigned int horkage; /* List of broken features */ @@ -510,6 +510,24 @@ struct ata_acpi_gtm { u32 flags; } __packed; +struct ata_link { + struct ata_port *ap; + + unsigned int active_tag; /* active tag on this link */ + u32 sactive; /* active NCQ commands */ + + unsigned int hw_sata_spd_limit; + unsigned int sata_spd_limit; + unsigned int sata_spd; /* current SATA PHY speed */ + + /* record runtime error info, protected by host_set lock */ + struct ata_eh_info eh_info; + /* EH context */ + struct ata_eh_context eh_context; + + struct ata_device device[ATA_MAX_DEVICES]; +}; + struct ata_port { struct Scsi_Host *scsi_host; /* our co-allocated scsi host */ const struct ata_port_operations *ops; @@ -533,23 +551,12 @@ struct ata_port { unsigned int mwdma_mask; unsigned int udma_mask; unsigned int cbl; /* cable type; ATA_CBL_xxx */ - unsigned int hw_sata_spd_limit; - unsigned int sata_spd_limit; /* SATA PHY speed limit */ - unsigned int sata_spd; /* current SATA PHY speed */ - - /* record runtime error info, protected by host lock */ - struct ata_eh_info eh_info; - /* EH context owned by EH */ - struct ata_eh_context eh_context; - - struct ata_device device[ATA_MAX_DEVICES]; struct ata_queued_cmd qcmd[ATA_MAX_QUEUE]; unsigned long qc_allocated; unsigned int qc_active; - unsigned int active_tag; - u32 sactive; + struct ata_link link; /* host default link */ struct ata_port_stats stats; struct ata_host *host; @@ -912,8 +919,11 @@ extern void ata_do_eh(struct ata_port *ap, ata_prereset_fn_t prereset, #define ata_port_printk(ap, lv, fmt, args...) \ printk(lv"ata%u: "fmt, (ap)->print_id , ##args) +#define ata_link_printk(link, lv, fmt, args...) \ + printk(lv"ata%u: "fmt, (link)->ap->print_id , ##args) + #define ata_dev_printk(dev, lv, fmt, args...) \ - printk(lv"ata%u.%02u: "fmt, (dev)->ap->print_id, (dev)->devno , ##args) + printk(lv"ata%u.%02u: "fmt, (dev)->link->ap->print_id, (dev)->devno , ##args) /* * ata_eh_info helpers @@ -1149,7 +1159,7 @@ static inline void ata_tf_init(struct ata_device *dev, struct ata_taskfile *tf) { memset(tf, 0, sizeof(*tf)); - tf->ctl = dev->ap->ctl; + tf->ctl = dev->link->ap->ctl; if (dev->devno == 0) tf->device = ATA_DEVICE_OBS; else |