drm/i915: fall back to shmem pwrite when the buffer is not accessible

It's too expensive to move it around just for that pwrite, especially
when we're trashing on the mappable gtt part like crazy.

Tested-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 83dfb4407c8f78ae15f66badad5910fc5729c801..7f33e6af6ecbeb3fa413dd57c3a72baca6a4abeb 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -771,6 +771,7 @@ i915_gem_pwrite_ioctl(struct drm_device *dev, void *data,
 
        if (obj->gtt_space &&
            obj->cache_level == I915_CACHE_NONE &&
+           obj->map_and_fenceable &&
            obj->base.write_domain != I915_GEM_DOMAIN_CPU) {
                ret = i915_gem_gtt_pwrite_fast(dev, obj, args, file);
                /* Note that the gtt paths might fail with non-page-backed user