• Alexandre Bounine's avatar
    rapidio: add handling of redundant routes · af84ca38
    Alexandre Bounine authored
    Detects RIO link to the already enumerated device and properly sets links
    between device objects.  Changes to the enumeration/discovery logic:
    
    1. Use Master Enable bit to signal end of the enumeration - agents may
       start their discovery process as soon as they see this bit set
       (Component Tag register was used before for this purpose).
    
    2. Enumerator sets Component Tag (!= 0) immediately during device
       setup.  This allows to identify the device if the redundant route
       exists in a RIO system.
    Signed-off-by: default avatarAlexandre Bounine <alexandre.bounine@idt.com>
    Cc: Thomas Moll <thomas.moll@sysgo.com>
    Cc: Matt Porter <mporter@kernel.crashing.org>
    Cc: Li Yang <leoli@freescale.com>
    Cc: Kumar Gala <galak@kernel.crashing.org>
    Cc: Micha Nelissen <micha@neli.hopto.org>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    af84ca38
fsl_rio.c 44.3 KB