]> git.baikalelectronics.ru Git - kernel.git/commit
drm/i915: Provide an assert for when we expect forcewake to be held
authorChris Wilson <chris@chris-wilson.co.uk>
Mon, 9 Oct 2017 11:03:01 +0000 (12:03 +0100)
committerChris Wilson <chris@chris-wilson.co.uk>
Mon, 9 Oct 2017 16:07:29 +0000 (17:07 +0100)
commit67e6456485c7c04838a5dad720886726ae5590e0
tree064632fdab46beff2fdd9e7bfeceb3fc116d8c1e
parentff97d3ae6951101a85e5153cb128292d7119d15c
drm/i915: Provide an assert for when we expect forcewake to be held

Add assert_forcewakes_active() (the complementary function to
assert_forcewakes_inactive) that documents the requirement of a
function for its callers to be holding the forcewake ref (i.e. the
function is part of a sequence over which RC6 must be prevented).

One such example is during ringbuffer reset, where RC6 must be held
across the whole reinitialisation sequence.

v2: Include debug information in the WARN so we know which fw domain is
missing.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com> #v1
Link: https://patchwork.freedesktop.org/patch/msgid/20171009110301.21705-5-chris@chris-wilson.co.uk
drivers/gpu/drm/i915/intel_ringbuffer.c
drivers/gpu/drm/i915/intel_uncore.c
drivers/gpu/drm/i915/intel_uncore.h