Re: [Intel-gfx] [PATCH v4 1/3] drm/i915: Add GuC TLB Invalidation pci tags

[Jani Nikula <jani.nikula@linux.intel.com>]

On Tue, 03 Oct 2023, Jonathan Cavitt <jonathan.cavitt@intel.com> wrote:
> Add device info tags for if GuC TLB Invalidation is enabled.  Since GuC
> based TLB invalidation is only strictly necessary for MTL presently,
> only enable GuC based TLB invalidations for MTL.

In the subject, what's a "pci tag"?

BR,
Jani.


>
> Signed-off-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
> ---
>  drivers/gpu/drm/i915/i915_drv.h          | 1 +
>  drivers/gpu/drm/i915/i915_pci.c          | 1 +
>  drivers/gpu/drm/i915/intel_device_info.h | 3 ++-
>  3 files changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index b4fa81cab92d7..154f004373a9c 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -821,4 +821,5 @@ IS_SUBPLATFORM(const struct drm_i915_private *i915,
>  #define HAS_LMEMBAR_SMEM_STOLEN(i915) (!HAS_LMEM(i915) && \
>  				       GRAPHICS_VER_FULL(i915) >= IP_VER(12, 70))
>  
> +#define HAS_GUC_TLB_INVALIDATION(i915)	(INTEL_INFO(i915)->has_guc_tlb_invalidation)
>  #endif
> diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
> index df7c261410f79..c3a5d5efb45d1 100644
> --- a/drivers/gpu/drm/i915/i915_pci.c
> +++ b/drivers/gpu/drm/i915/i915_pci.c
> @@ -837,6 +837,7 @@ static const struct intel_device_info mtl_info = {
>  	.memory_regions = REGION_SMEM | REGION_STOLEN_LMEM,
>  	.platform_engine_mask = BIT(RCS0) | BIT(BCS0) | BIT(CCS0),
>  	.require_force_probe = 1,
> +	.has_guc_tlb_invalidation = 1,
>  	MTL_CACHELEVEL,
>  };
>  
> diff --git a/drivers/gpu/drm/i915/intel_device_info.h b/drivers/gpu/drm/i915/intel_device_info.h
> index 39817490b13fd..ad54db0a22470 100644
> --- a/drivers/gpu/drm/i915/intel_device_info.h
> +++ b/drivers/gpu/drm/i915/intel_device_info.h
> @@ -173,7 +173,8 @@ enum intel_ppgtt_type {
>  	func(has_coherent_ggtt); \
>  	func(tuning_thread_rr_after_dep); \
>  	func(unfenced_needs_alignment); \
> -	func(hws_needs_physical);
> +	func(hws_needs_physical); \
> +	func(has_guc_tlb_invalidation);
>  
>  struct intel_ip_version {
>  	u8 ver;

-- 
Jani Nikula, Intel