diff options
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.h | 9 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_ringbuffer.c | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_ringbuffer.h | 3 |
3 files changed, 13 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.h b/drivers/gpu/drm/i915/i915_gem.h index a585d47c420a..412fa2794cbb 100644 --- a/drivers/gpu/drm/i915/i915_gem.h +++ b/drivers/gpu/drm/i915/i915_gem.h @@ -28,9 +28,18 @@ #ifdef CONFIG_DRM_I915_DEBUG_GEM #define GEM_BUG_ON(expr) BUG_ON(expr) #define GEM_WARN_ON(expr) WARN_ON(expr) + +#define GEM_BUG_ONLY(expr) expr +#define GEM_BUG_ONLY_DECLARE(var) var +#define GEM_BUG_ONLY_ON(expr) GEM_BUG_ON(expr) + #else #define GEM_BUG_ON(expr) BUILD_BUG_ON_INVALID(expr) #define GEM_WARN_ON(expr) (BUILD_BUG_ON_INVALID(expr), 0) + +#define GEM_BUG_ONLY(expr) do { } while (0) +#define GEM_BUG_ONLY_DECLARE(var) +#define GEM_BUG_ONLY_ON(expr) #endif #define I915_NUM_ENGINES 5 diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index d32cbba25d98..383083ef2210 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -2238,6 +2238,7 @@ int intel_ring_begin(struct drm_i915_gem_request *req, int num_dwords) ring->space -= bytes; GEM_BUG_ON(ring->space < 0); + GEM_BUG_ONLY(ring->advance = ring->tail + bytes); return 0; } diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h index b9c15cd40fbf..2c6d3655985e 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.h +++ b/drivers/gpu/drm/i915/intel_ringbuffer.h @@ -144,6 +144,8 @@ struct intel_ring { u32 head; u32 tail; + GEM_BUG_ONLY_DECLARE(u32 advance); + int space; int size; int effective_size; @@ -516,6 +518,7 @@ static inline void intel_ring_advance(struct intel_ring *ring) * reserved for the command packet (i.e. the value passed to * intel_ring_begin()). */ + GEM_BUG_ONLY_ON(ring->tail != ring->advance); } static inline u32 intel_ring_offset(struct intel_ring *ring, void *addr) |