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authorTejun Heo <htejun@gmail.com>2007-08-06 13:36:22 +0400
committerJeff Garzik <jeff@garzik.org>2007-10-12 22:55:30 +0400
commit9af5c9c97dc9d599281778864c72b385f0c63341 (patch)
tree8359986bd42c4a9a5b1993078aa9ee4c7971ac3d /block
parent640fdb504941fa2b9f6f274716fc9f97f2bf6bff (diff)
downloadlinux-9af5c9c97dc9d599281778864c72b385f0c63341.tar.xz
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>
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