From de18a29e0fa3904894b4e02fae0e712cd43f740c Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Sat, 27 Nov 2010 22:30:41 +0100 Subject: [PATCH] drm/i915: fix regression due to ba3d8d749b01548b9 We don't track gpu flush request in any special way. So even with obj->write_domain == 0, a gpu flush might be outstanding but no yet executed. Even worse, the latest request might use the object only for reading. So and unconditional call to object_wait_rendering is needed for !pipelined. Hence revert that patch fully and untangle the flushing from the synchronization again. Reported-by: Keith Packard Tested-by: Keith Packard Signed-off-by: Daniel Vetter Signed-off-by: Chris Wilson --- drivers/gpu/drm/i915/i915_gem.c | 43 ++++++++++++++------------------- 1 file changed, 18 insertions(+), 25 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 92b097dbe4f..5e54821af99 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -38,8 +38,7 @@ static uint32_t i915_gem_get_gtt_alignment(struct drm_gem_object *obj); -static int i915_gem_object_flush_gpu_write_domain(struct drm_gem_object *obj, - bool pipelined); +static int i915_gem_object_flush_gpu_write_domain(struct drm_gem_object *obj); static void i915_gem_object_flush_gtt_write_domain(struct drm_gem_object *obj); static void i915_gem_object_flush_cpu_write_domain(struct drm_gem_object *obj); static int i915_gem_object_set_to_cpu_domain(struct drm_gem_object *obj, @@ -2594,7 +2593,7 @@ i915_gem_object_put_fence_reg(struct drm_gem_object *obj, if (reg->gpu) { int ret; - ret = i915_gem_object_flush_gpu_write_domain(obj, true); + ret = i915_gem_object_flush_gpu_write_domain(obj); if (ret) return ret; @@ -2742,8 +2741,7 @@ i915_gem_clflush_object(struct drm_gem_object *obj) /** Flushes any GPU write domain for the object if it's dirty. */ static int -i915_gem_object_flush_gpu_write_domain(struct drm_gem_object *obj, - bool pipelined) +i915_gem_object_flush_gpu_write_domain(struct drm_gem_object *obj) { struct drm_device *dev = obj->dev; uint32_t old_write_domain; @@ -2762,10 +2760,7 @@ i915_gem_object_flush_gpu_write_domain(struct drm_gem_object *obj, obj->read_domains, old_write_domain); - if (pipelined) - return 0; - - return i915_gem_object_wait_rendering(obj, true); + return 0; } /** Flushes the GTT write domain for the object if it's dirty. */ @@ -2826,18 +2821,15 @@ i915_gem_object_set_to_gtt_domain(struct drm_gem_object *obj, int write) if (obj_priv->gtt_space == NULL) return -EINVAL; - ret = i915_gem_object_flush_gpu_write_domain(obj, false); + ret = i915_gem_object_flush_gpu_write_domain(obj); if (ret != 0) return ret; + ret = i915_gem_object_wait_rendering(obj, true); + if (ret) + return ret; i915_gem_object_flush_cpu_write_domain(obj); - if (write) { - ret = i915_gem_object_wait_rendering(obj, true); - if (ret) - return ret; - } - old_write_domain = obj->write_domain; old_read_domains = obj->read_domains; @@ -2875,7 +2867,7 @@ i915_gem_object_set_to_display_plane(struct drm_gem_object *obj, if (obj_priv->gtt_space == NULL) return -EINVAL; - ret = i915_gem_object_flush_gpu_write_domain(obj, true); + ret = i915_gem_object_flush_gpu_write_domain(obj); if (ret) return ret; @@ -2924,9 +2916,12 @@ i915_gem_object_set_to_cpu_domain(struct drm_gem_object *obj, int write) uint32_t old_write_domain, old_read_domains; int ret; - ret = i915_gem_object_flush_gpu_write_domain(obj, false); + ret = i915_gem_object_flush_gpu_write_domain(obj); if (ret != 0) return ret; + ret = i915_gem_object_wait_rendering(obj, true); + if (ret) + return ret; i915_gem_object_flush_gtt_write_domain(obj); @@ -2935,12 +2930,6 @@ i915_gem_object_set_to_cpu_domain(struct drm_gem_object *obj, int write) */ i915_gem_object_set_to_full_cpu_read_domain(obj); - if (write) { - ret = i915_gem_object_wait_rendering(obj, true); - if (ret) - return ret; - } - old_write_domain = obj->write_domain; old_read_domains = obj->read_domains; @@ -3205,9 +3194,13 @@ i915_gem_object_set_cpu_read_domain_range(struct drm_gem_object *obj, if (offset == 0 && size == obj->size) return i915_gem_object_set_to_cpu_domain(obj, 0); - ret = i915_gem_object_flush_gpu_write_domain(obj, false); + ret = i915_gem_object_flush_gpu_write_domain(obj); if (ret != 0) return ret; + ret = i915_gem_object_wait_rendering(obj, true); + if (ret) + return ret; + i915_gem_object_flush_gtt_write_domain(obj); /* If we're already fully in the CPU read domain, we're done. */ -- 2.20.1