[Intel-gfx] [RFC] [PATCH 3/7] drm/i915: add reset_status for hw_contexts

[Mika Kuoppala]

For arb-robustness, every context needs to have it's own
reset status. Default context will be handled in a identical
way as the no-context case in further down in the patch set.
For no-context case, the reset status will be stored in
the file_priv part.

Signed-off-by: Mika Kuoppala <mika.kuoppala at intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h         |    5 +++++
 drivers/gpu/drm/i915/i915_gem_context.c |   33 +++++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index b87240f..42fcfb6 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1674,6 +1674,11 @@ void i915_gem_context_fini(struct drm_device *dev);
 void i915_gem_context_close(struct drm_device *dev, struct drm_file *file);
 int i915_switch_context(struct intel_ring_buffer *ring,
 			struct drm_file *file, int to_id);
+void i915_gem_context_free(struct kref *ctx_ref);
+int i915_gem_context_get_reset_stats(struct intel_ring_buffer *ring,
+				     struct drm_file *file,
+				     u32 id,
+				     struct i915_reset_stats **rs);
 int i915_gem_context_create_ioctl(struct drm_device *dev, void *data,
 				  struct drm_file *file);
 int i915_gem_context_destroy_ioctl(struct drm_device *dev, void *data,
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index a3f06bc..8e0d50c 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -299,6 +299,39 @@ static int context_idr_cleanup(int id, void *p, void *data)
 	return 0;
 }
 
+int i915_gem_context_get_reset_stats(struct intel_ring_buffer *ring,
+				     struct drm_file *file,
+				     u32 id,
+				     struct i915_reset_stats **rs)
+{
+	struct drm_i915_private *dev_priv = ring->dev->dev_private;
+	struct i915_hw_context *to;
+
+	if (dev_priv->hw_contexts_disabled)
+		return -ENOENT;
+
+	if (ring->id != RCS)
+		return -EINVAL;
+
+	/* No reset status for default context id, it is in file_priv */
+	if (id == DEFAULT_CONTEXT_ID)
+		return -EINVAL;
+
+	if (rs == NULL)
+		return -EINVAL;
+
+	if (file == NULL)
+		return -EINVAL;
+
+	to = i915_gem_context_get(file->driver_priv, id);
+	if (to == NULL)
+		return -ENOENT;
+
+	*rs = &to->reset_stats;
+
+	return 0;
+}
+
 void i915_gem_context_close(struct drm_device *dev, struct drm_file *file)
 {
 	struct drm_i915_file_private *file_priv = file->driver_priv;
-- 
1.7.9.5