• Chris Wilson's avatar
    drm/i915: Unify GPU resets upon shutdown · e7ae86ba
    Chris Wilson authored
    Both execlists and legacy need to reset the context (and mode) of the
    GPU before we lose control of the system. By resetting the GPU, we
    revert back to default settings. This simplifies the life of any
    subsequent driver (in particular for virtualized setups) as it does not
    then have to try and recover from an unknown condition. As both paths
    need to reset for the same reason, move the reset to a common point.
    
    This unifies the resets added in a647828a (drm/i915: Also perform gpu
    reset under execlist mode) and 8e96d9c4 (drm/i915: reset the GPU on
    context fini).
    
    v2: Restrict the reset to "modern" gen (where we enable HW contexts) to
    try and avoid leaving the machine in an unusable state with a risky
    reset on older GPU. This should keep the status quo as to who performs
    resets (i.e. currently only GPUs with HW contexts perform a reset on
    shutdown).
    Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
    Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
    CC: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
    Cc: Mika Kuoppala <mika.kuoppala@intel.com>
    Cc: "Niu, Bing" <bing.niu@intel.com>
    Reviewed-by: default avatarMika Kuoppala <mika.kuoppala@intel.com>
    Link: http://patchwork.freedesktop.org/patch/msgid/1461833819-3991-25-git-send-email-chris@chris-wilson.co.uk
    e7ae86ba
i915_gem.c 136 KB