On 18/07/2019 08:00, Chris Wilson wrote:
Use the same mechanism to determine if a backend engine exists for a
uabi mapping as used internally.

Signed-off-by: Chris Wilson <[email protected]>
---
  drivers/gpu/drm/i915/i915_drv.c | 13 +++++++++----
  1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index d1c3499c8e03..367bdc4689f1 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -61,6 +61,7 @@
#include "gem/i915_gem_context.h"
  #include "gem/i915_gem_ioctls.h"
+#include "gt/intel_engine_user.h"
  #include "gt/intel_gt.h"
  #include "gt/intel_gt_pm.h"
  #include "gt/intel_reset.h"
@@ -371,16 +372,20 @@ static int i915_getparam_ioctl(struct drm_device *dev, 
void *data,
                value = dev_priv->overlay ? 1 : 0;
                break;
        case I915_PARAM_HAS_BSD:
-               value = !!dev_priv->engine[VCS0];
+               value = !!intel_engine_lookup_user(dev_priv,
+                                                  I915_ENGINE_CLASS_VIDEO, 0);
                break;
        case I915_PARAM_HAS_BLT:
-               value = !!dev_priv->engine[BCS0];
+               value = !!intel_engine_lookup_user(dev_priv,
+                                                  I915_ENGINE_CLASS_COPY, 0);
                break;
        case I915_PARAM_HAS_VEBOX:
-               value = !!dev_priv->engine[VECS0];
+               value = !!intel_engine_lookup_user(dev_priv,
+                                                  
I915_ENGINE_CLASS_VIDEO_ENHANCE, 0);
                break;
        case I915_PARAM_HAS_BSD2:
-               value = !!dev_priv->engine[VCS1];
+               value = !!intel_engine_lookup_user(dev_priv,
+                                                  I915_ENGINE_CLASS_VIDEO, 1);
                break;
        case I915_PARAM_HAS_LLC:
                value = HAS_LLC(dev_priv);


How do you see ABI semantics of these get_params - "GPU has engine X, or I915_EXEC_X will work"?

Regards,

Tvrtko
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