drm/i915/guc: capture GuC logs if FW fails to load
authorDaniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Mon, 22 May 2017 17:50:28 +0000 (10:50 -0700)
committerChris Wilson <chris@chris-wilson.co.uk>
Fri, 26 May 2017 12:59:56 +0000 (13:59 +0100)
commitac58d2ab0ad9c8b7e41404048a3ba4375db012d3
tree83fa3682bd3d1381a3e883e8cbf72a8a401c61e0
parentf8a58d639dd95b0188862b4c1c1cc81c737db612
drm/i915/guc: capture GuC logs if FW fails to load

We're currently deleting the GuC logs if the FW fails to load, but those
are still useful to understand why the loading failed. Keeping the
object around allows us to access them after driver load is completed.

v2: keep the object around instead of using kernel memory (chris)
    don't store the logs in the gpu_error struct (Chris)
    add a check on guc_log_level to avoid snapshotting empty logs

v3: use separate debugfs for error log (Chris)

v4: rebased

v5: clean up obj selection, move err_load inside guc_log, move err_load
    cleanup, rename functions (Michal)

v6: move obj back to intel_guc, move functions to intel_uc.c, don't
    clear obj on new GuC load, free object only if enable_guc_loading
    is set (Michal)

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Oscar Mateo <oscar.mateo@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1495475428-19295-1-git-send-email-daniele.ceraolospurio@intel.com
Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Tested-by: Michel Thierry <michel.thierry@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
drivers/gpu/drm/i915/i915_debugfs.c
drivers/gpu/drm/i915/intel_uc.c
drivers/gpu/drm/i915/intel_uc.h