diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 4f345414fe7..174aef2d648 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -2162,7 +2162,6 @@ static void i830_write_fence_reg(struct drm_i915_fence_reg *reg) val |= I830_FENCE_REG_VALID; I915_WRITE(FENCE_REG_830_0 + (regnum * 4), val); - } /** @@ -2329,6 +2328,42 @@ i915_gem_clear_fence_reg(struct drm_gem_object *obj) } /** + * i915_gem_object_put_fence_reg - waits on outstanding fenced access + * to the buffer to finish, and then resets the fence register. + * @obj: tiled object holding a fence register. + * + * Zeroes out the fence register itself and clears out the associated + * data structures in dev_priv and obj_priv. + */ +int +i915_gem_object_put_fence_reg(struct drm_gem_object *obj) +{ + struct drm_device *dev = obj->dev; + struct drm_i915_gem_object *obj_priv = obj->driver_private; + + if (obj_priv->fence_reg == I915_FENCE_REG_NONE) + return 0; + + /* On the i915, GPU access to tiled buffers is via a fence, + * therefore we must wait for any outstanding access to complete + * before clearing the fence. + */ + if (!IS_I965G(dev)) { + int ret; + + i915_gem_object_flush_gpu_write_domain(obj); + i915_gem_object_flush_gtt_write_domain(obj); + ret = i915_gem_object_wait_rendering(obj); + if (ret != 0) + return ret; + } + + i915_gem_clear_fence_reg (obj); + + return 0; +} + +/** * Finds free space in the GTT aperture and binds the object there. */ static int |