On 05/12/2015 12:49 PM, Chris Wilson wrote:
> On Mon, May 11, 2015 at 12:01:11PM +0300, Abdiel Janulgue wrote:
>> Ensures that the batch buffer is executed by the resource streamer
>>
>> Signed-off-by: Abdiel Janulgue <abdiel.janul...@linux.intel.com>
>> ---
>> drivers/gpu/drm/i915/i915_gem_execbuffer.c | 15 +++++++++++++++
>> drivers/gpu/drm/i915/intel_ringbuffer.h | 1 +
>> include/uapi/drm/i915_drm.h | 7 ++++++-
>> 3 files changed, 22 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
>> b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
>> index a3190e79..afbd3c16 100644
>> --- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
>> +++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
>> @@ -1474,6 +1474,21 @@ i915_gem_do_execbuffer(struct drm_device *dev, void
>> *data,
>> } else
>> ring = &dev_priv->ring[(args->flags & I915_EXEC_RING_MASK) - 1];
>>
>> + if (args->flags & I915_EXEC_RESOURCE_STREAMER) {
>> + if (!IS_HASWELL(dev) && INTEL_INFO(dev)->gen < 8) {
>> + DRM_DEBUG("RS is only allowed for Haswell, Gen8 "
>> + "and above\n");
>> + return -EINVAL;
>> + }
>> + if (ring->id != RCS) {
>> + DRM_DEBUG("RS is not available on %s)\n",
>> + ring->name);
>> + return -EINVAL;
>> + }
>> +
>> + dispatch_flags |= I915_DISPATCH_RS;
>> + }
>> +
>> if (!intel_ring_initialized(ring)) {
>
> Please don't split the conversion from args->flags to ring from its
> subsequent EINVAL check.
> -Chris
>
I'll include this change in the next version.
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