• Zhi Wang's avatar
    drm/i915: Introduce execlist context status change notification · 3c7ba635
    Zhi Wang authored
    This patch introduces an approach to track the execlist context status
    change.
    
    GVT-g uses GVT context as the "shadow context". The content inside GVT
    context will be copied back to guest after the context is idle. And GVT-g
    has to know the status of the execlist context.
    
    This function is configurable when creating a new GEM context. Currently,
    Only GVT-g will create the "status-change-notification" enabled GEM
    context.
    
    v10:
    
    - Fix the identation. (Joonas)
    
    v8:
    
    - Remove the boolean flag in struct i915_gem_context. (Joonas)
    
    v7:
    
    - Remove per-engine ctx status notifiers. Use one status notifier for all
    engines. (Joonas)
    - Add prefix "INTEL_" for related definitions. (Joonas)
    - Refine the comments in execlists_context_status_change(). (Joonas)
    
    v6:
    
    - When !CONFIG_DRM_I915_GVT, make GVT code as dead code then compiler
    could automatically eliminate them for us. (Chris)
    - Always initialize the notifier header, so it could be switched on/off
    at runtime. (Chris)
    
    v5:
    
    - Only compile this feature when CONFIG_DRM_I915_GVT is enabled.(Tvrtko)
    
    Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> (v8)
    Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
    Cc: Chris Wilson <chris@chris-wilson.co.uk>
    Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
    Signed-off-by: default avatarZhi Wang <zhi.a.wang@intel.com>
    Link: http://patchwork.freedesktop.org/patch/msgid/1466078825-6662-8-git-send-email-zhi.a.wang@intel.comSigned-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
    3c7ba635
i915_drv.h 119 KB