On su, 2016-08-07 at 15:45 +0100, Chris Wilson wrote:
> With execlists, we have context objects everywhere, not just RCS. So
> store them for post-mortem debugging. This also has a secondary effect
> of removing one more unsafe list iteration with using preserved state
> from the hanging request. And now we can cross-reference the request's
> context state with that loaded by the GPU.
>
> Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahti...@linux.intel.com>
> ---
> drivers/gpu/drm/i915/i915_gpu_error.c | 28 ++++------------------------
> 1 file changed, 4 insertions(+), 24 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c
> b/drivers/gpu/drm/i915/i915_gpu_error.c
> index b94a59733cf8..c621fa23cd28 100644
> --- a/drivers/gpu/drm/i915/i915_gpu_error.c
> +++ b/drivers/gpu/drm/i915/i915_gpu_error.c
> @@ -1028,28 +1028,6 @@ static void error_record_engine_registers(struct
> drm_i915_error_state *error,
> }
> }
>
> -static void i915_gem_record_active_context(struct intel_engine_cs *engine,
> - struct drm_i915_error_state *error,
> - struct drm_i915_error_engine *ee)
> -{
> - struct drm_i915_private *dev_priv = engine->i915;
> - struct drm_i915_gem_object *obj;
> -
> - /* Currently render ring is the only HW context user */
> - if (engine->id != RCS || !error->ccid)
> - return;
> -
> - list_for_each_entry(obj, &dev_priv->mm.bound_list, global_list) {
> - if (!i915_gem_obj_ggtt_bound(obj))
> - continue;
> -
> - if ((error->ccid & PAGE_MASK) == i915_gem_obj_ggtt_offset(obj))
> {
> - ee->ctx = i915_error_ggtt_object_create(dev_priv, obj);
> - break;
> - }
> - }
> -}
> -
> static void i915_gem_record_rings(struct drm_i915_private *dev_priv,
> struct drm_i915_error_state *error)
> {
> @@ -1099,6 +1077,10 @@ static void i915_gem_record_rings(struct
> drm_i915_private *dev_priv,
> i915_error_ggtt_object_create(dev_priv,
>
> engine->scratch.obj);
>
> + ee->ctx =
> + i915_error_ggtt_object_create(dev_priv,
> +
> request->ctx->engine[i].state);
> +
> if (request->pid) {
> struct task_struct *task;
>
> @@ -1129,8 +1111,6 @@ static void i915_gem_record_rings(struct
> drm_i915_private *dev_priv,
> ee->wa_ctx = i915_error_ggtt_object_create(dev_priv,
> engine->wa_ctx.obj);
>
> - i915_gem_record_active_context(engine, error, ee);
> -
> count = 0;
> list_for_each_entry(request, &engine->request_list, link)
> count++;
--
Joonas Lahtinen
Open Source Technology Center
Intel Corporation
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