diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem_execbuffer.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_execbuffer.c | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c index fda0dc858a1f..61129e6759eb 100644 --- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c @@ -957,7 +957,7 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data, struct intel_ring_buffer *ring; u32 exec_start, exec_len; u32 seqno; - int ret, i; + int ret, mode, i; if (!i915_gem_check_execbuffer(args)) { DRM_ERROR("execbuf with invalid offset/length\n"); @@ -997,6 +997,39 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data, return -EINVAL; } + mode = args->flags & I915_EXEC_CONSTANTS_MASK; + switch (mode) { + case I915_EXEC_CONSTANTS_REL_GENERAL: + case I915_EXEC_CONSTANTS_ABSOLUTE: + case I915_EXEC_CONSTANTS_REL_SURFACE: + if (ring == &dev_priv->ring[RCS] && + mode != dev_priv->relative_constants_mode) { + if (INTEL_INFO(dev)->gen < 4) + return -EINVAL; + + if (INTEL_INFO(dev)->gen > 5 && + mode == I915_EXEC_CONSTANTS_REL_SURFACE) + return -EINVAL; + + ret = intel_ring_begin(ring, 4); + if (ret) + return ret; + + intel_ring_emit(ring, MI_NOOP); + intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(1)); + intel_ring_emit(ring, INSTPM); + intel_ring_emit(ring, + I915_EXEC_CONSTANTS_MASK << 16 | mode); + intel_ring_advance(ring); + + dev_priv->relative_constants_mode = mode; + } + break; + default: + DRM_ERROR("execbuf with unknown constants: %d\n", mode); + return -EINVAL; + } + if (args->buffer_count < 1) { DRM_ERROR("execbuf with %d buffers\n", args->buffer_count); return -EINVAL; |