• Ben Widawsky's avatar
    drm/i915: l3 parity sysfs interface · 84bc7581
    Ben Widawsky authored
    
    
    Dumb binary interfaces which allow root-only updates of the cache
    remapping registers. As mentioned in a previous patch, software using
    this interface needs to know about HW limits, and other programming
    considerations as the kernel interface does no checking for these things
    on the root-only interface.
    
    v1: Drop extra posting reads (Chris)
    Return negative values in the sysfs interfaces on errors (Chris)
    
    v2: Return -EINVAL for offset % 4 (Jesse)
    Move schizo userspace check out (Jesse)
    Cleaner sysfs item initializers (Daniel)
    Signed-off-by: default avatarBen Widawsky <ben@bwidawsk.net>
    Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
    84bc7581