• Joonas Lahtinen's avatar
    drm/i915/guc: Sanitize GuC client initialization · abddffdf
    Joonas Lahtinen authored
    Started adding proper teardown to guc_client_alloc, ended up removing
    quite a few dead ends where errors communicating with the GuC were
    silently ignored. There also seemed to be quite a few erronous
    teardown actions performed in case of an error (ordering wrong).
    
    v2:
      - Increase function symmetry/proximity (Michal/Daniele)
      - Fix __reserve_doorbell accounting for high priority (Daniele)
      - Call __update_doorbell_desc! (Daniele)
      - Isolate __guc_{,de}allocate_doorbell (Michal/Daniele)
    
    v3:
      - "Select" a cacheline is a more accurate verb than "reserve" (Daniele).
      - We cannot update & create the doorbell without reserving it first, so
        move the whole doorbell creation for execbuf_client to the submission
        enable (Oscar).i
      - Add a fixme for ignoring possible doorbell destroy errors.
    
    v4:
      - Remove comment about is_high_priority (Daniele)
      - Debug message typo (Daniele)
      - Reuse __get_doorbell in more places (Daniele)
      - Do not do arithmetic on void pointers (Daniele)
      - Add comment to __reset_doorbell (Daniele)
    
    v5:
      - gccisms like arithmetic on void pointers are not frowned upon (Oscar)
    Signed-off-by: default avatarJoonas Lahtinen <joonas.lahtinen@linux.intel.com>
    Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
    Cc: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
    Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
    Cc: Chris Wilson <chris@chris-wilson.co.uk>
    Signed-off-by: default avatarOscar Mateo <oscar.mateo@intel.com>
    Reviewed-by: default avatarDaniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
    abddffdf
i915_debugfs.c 138 KB