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[03/10] drm/i915: Upgrade execbuffer fail after resume failure to EIO

Message ID 1404423186-2019-4-git-send-email-rodrigo.vivi@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Rodrigo Vivi July 3, 2014, 9:32 p.m. UTC 
From: Chris Wilson <chris@chris-wilson.co.uk>

If we try to execute on a known ring, but it has failed to be
initialised correctly, report that the GPU is hung rather than the
command invalid. This leaves us reporting EINVAL only if the user
requests execution on a ring that is not supported by the device.

This should prevent UXA from getting stuck in a null render loop after a
failed resume.

v2 (Rodrigo): Fix conflict and add VCS2 ring and
   	      s/intel_ring_buffer/intel_engine_cs.

Reported-by: Jiri Kosina <jikos@jikos.cz>
References: https://bugs.freedesktop.org/show_bug.cgi?id=76554
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
---
 drivers/gpu/drm/i915/i915_gem_execbuffer.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index d815ef5..23786ab 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -1076,6 +1076,19 @@  eb_get_batch(struct eb_vmas *eb)
 	return vma->obj;
 }
 
+static bool
+intel_ring_valid(struct intel_engine_cs *ring)
+{
+	switch (ring->id) {
+	case RCS: return true;
+	case VCS: return HAS_BSD(ring->dev);
+	case BCS: return HAS_BLT(ring->dev);
+	case VECS: return HAS_VEBOX(ring->dev);
+	case VCS2: return HAS_BSD2(ring->dev);
+	default: return false;
+	}
+}
+
 static int
 i915_gem_do_execbuffer(struct drm_device *dev, void *data,
 		       struct drm_file *file,
@@ -1133,7 +1146,7 @@  i915_gem_do_execbuffer(struct drm_device *dev, void *data,
 	if (!intel_ring_initialized(ring)) {
 		DRM_DEBUG("execbuf with invalid ring: %d\n",
 			  (int)(args->flags & I915_EXEC_RING_MASK));
-		return -EINVAL;
+		return intel_ring_valid(ring) ? -EIO : -EINVAL;
 	}
 
 	mode = args->flags & I915_EXEC_CONSTANTS_MASK;