[Intel-gfx] [PATCH 1/3] drm/i915: add function for GT related workarounds

[Mika Kuoppala]

tim.gore at intel.com writes:

> From: Tim Gore <tim.gore at intel.com>
>
> Add a function that is a place for workarounds that are
> GT related but not required per ring. This function is
> called on driver load and also after a reset and on
> resume, so it is safe for workarounds that get clobbered
> in these situations.
>
> Signed-off-by: Tim Gore <tim.gore at intel.com>
> ---
>  drivers/gpu/drm/i915/i915_gem_gtt.c | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
> index 7377b67..fe960d5 100644
> --- a/drivers/gpu/drm/i915/i915_gem_gtt.c
> +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
> @@ -2132,6 +2132,16 @@ static void i915_address_space_init(struct i915_address_space *vm,
>  	list_add_tail(&vm->global_link, &dev_priv->vm_list);
>  }
>  
> +void gtt_write_workarounds(struct drm_device *dev)
> +{

static void

This can be squashed with 2/3.

-Mika

> +	struct drm_i915_private *dev_priv = dev->dev_private;
> +
> +	/* This function is for gtt related workarounds. This function is
> +	 * called on driver load and after a GPU reset, so you can place
> +	 * workarounds here even if they get overwritten by GPU reset.
> +	 */
> +}
> +
>  int i915_ppgtt_init(struct drm_device *dev, struct i915_hw_ppgtt *ppgtt)
>  {
>  	struct drm_i915_private *dev_priv = dev->dev_private;
> @@ -2148,6 +2158,8 @@ int i915_ppgtt_init(struct drm_device *dev, struct i915_hw_ppgtt *ppgtt)
>  
>  int i915_ppgtt_init_hw(struct drm_device *dev)
>  {
> +	gtt_write_workarounds(dev);
> +
>  	/* In the case of execlists, PPGTT is enabled by the context descriptor
>  	 * and the PDPs are contained within the context itself.  We don't
>  	 * need to do anything here. */
> -- 
> 1.9.1