• Tejun Heo's avatar
    libata-link: introduce ata_link · 9af5c9c9
    Tejun Heo authored
    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: default avatarTejun Heo <htejun@gmail.com>
    Cc: James Bottomley <James.Bottomley@SteelEye.com>
    Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
    9af5c9c9
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