[Intel-gfx] [PATCH 09/33] drm/i915/gt: Mark ring->vma as active while pinned

[Lionel Landwerlin]

On 12/12/2019 16:04, Chris Wilson wrote:
> As we use the active state to keep the vma alive while we are reading
> its contents during GPU error capture, we need to mark the
> ring->vma as active during execution if we want to include the rinbuffer
> in the error state.
>
> Reported-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
> Fixes: b1e3177bd1d8 ("drm/i915: Coordinate i915_active with its own mutex")
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> Cc: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
Acked-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
> ---
>   drivers/gpu/drm/i915/gt/intel_ring.c | 10 +++++++++-
>   1 file changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_ring.c b/drivers/gpu/drm/i915/gt/intel_ring.c
> index 374b28f13ca0..7a27264150b9 100644
> --- a/drivers/gpu/drm/i915/gt/intel_ring.c
> +++ b/drivers/gpu/drm/i915/gt/intel_ring.c
> @@ -45,6 +45,10 @@ int intel_ring_pin(struct intel_ring *ring)
>   	if (unlikely(ret))
>   		goto err_unpin;
>   
> +	ret = i915_active_acquire(&vma->active);
> +	if (ret)
> +		goto err_ring;
> +
>   	if (i915_vma_is_map_and_fenceable(vma))
>   		addr = (void __force *)i915_vma_pin_iomap(vma);
>   	else
> @@ -52,7 +56,7 @@ int intel_ring_pin(struct intel_ring *ring)
>   					       i915_coherent_map_type(vma->vm->i915));
>   	if (IS_ERR(addr)) {
>   		ret = PTR_ERR(addr);
> -		goto err_ring;
> +		goto err_active;
>   	}
>   
>   	i915_vma_make_unshrinkable(vma);
> @@ -63,6 +67,8 @@ int intel_ring_pin(struct intel_ring *ring)
>   	ring->vaddr = addr;
>   	return 0;
>   
> +err_active:
> +	i915_active_release(&vma->active);
>   err_ring:
>   	i915_vma_unpin(vma);
>   err_unpin:
> @@ -93,6 +99,8 @@ void intel_ring_unpin(struct intel_ring *ring)
>   		i915_gem_object_unpin_map(vma->obj);
>   
>   	i915_vma_make_purgeable(vma);
> +
> +	i915_active_release(&vma->active);
>   	i915_vma_unpin(vma);
>   }
>