Re: [PATCH 4/5] drm/i915: Capture PPGTT info on error capture

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On Fri, Jan 24, 2014 at 06:17:44PM -0800, Ben Widawsky wrote:
> Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Signed-off-by: Ben Widawsky <ben@xxxxxxxxxxxx>
> ---
>  drivers/gpu/drm/i915/i915_drv.h       |  7 ++++++
>  drivers/gpu/drm/i915/i915_gpu_error.c | 41 +++++++++++++++++++++++++++++++++++
>  2 files changed, 48 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 6f68515..5105fd4 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -359,6 +359,13 @@ struct drm_i915_error_state {
>  		s32 ring:4;
>  		u32 cache_level:3;
>  	} **active_bo, **pinned_bo;
> +	struct drm_i915_vm_info {
> +		u32 gfx_mode;
> +		union {
> +			u64 pdp[4];
> +			u32 pp_dir_base;
> +		};
> +	} vm_info[I915_NUM_RINGS];

Note for future janitorial work: let's coalesce all the per-ring
information into the ring error struct.

>  	u32 *active_bo_count, *pinned_bo_count;

For instance, I thought active_bo was already being tracked per-ring.
(Pinned bo is global since that exists more or less to make sure that
our registers are pointing into pinned objects.)

Do we also want to capture?
  GAC_ECO_BITS /* gen6,7 */
  GAM_ECOCHK /* gen6,7 */
  GAB_CTL /* gen6 */
  GFX_MODE /* gen6 */

The rest looks good.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre
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