[v7,2/9] drm/i915: Add the has_aux_ccs device property

[Krzysztofik, Janusz]

Hi Andy,

On Thursday, 20 July 2023 23:07:30 CEST Andi Shyti wrote:
> We always assumed that a device might either have AUX or FLAT
> CCS, but this is an approximation that is not always true 

If there exists a device that can have CCSs that fall into either none or both 
of those categories then I think we should have that device or two listed here 
as an example, regardless of deducible from the change or not.  Or if there 
are no such devices so far, but we are going to introduce some, then I think 
we should provide that information here.

> as it
> requires some further per device checks.
> 
> Add the "has_aux_ccs" flag in the intel_device_info structure in
> order to have a per device flag indicating of the AUX CCS.
> 
> Signed-off-by: Andi Shyti <andi.shyti at linux.intel.com>
> Cc: Matt Roper <matthew.d.roper at intel.com>
> Cc: Jonathan Cavitt <jonathan.cavitt at intel.com>
> Cc: <stable at vger.kernel.org> # v5.8+
> ---
>  drivers/gpu/drm/i915/gt/gen8_engine_cs.c | 4 ++--
>  drivers/gpu/drm/i915/i915_drv.h          | 1 +
>  drivers/gpu/drm/i915/i915_pci.c          | 5 ++++-
>  drivers/gpu/drm/i915/intel_device_info.h | 1 +
>  4 files changed, 8 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/gt/gen8_engine_cs.c b/drivers/gpu/drm/
i915/gt/gen8_engine_cs.c
> index 563efee055602..0d4d5e0407a2d 100644
> --- a/drivers/gpu/drm/i915/gt/gen8_engine_cs.c
> +++ b/drivers/gpu/drm/i915/gt/gen8_engine_cs.c
> @@ -267,7 +267,7 @@ int gen12_emit_flush_rcs(struct i915_request *rq, u32 
mode)
>  		else if (engine->class == COMPUTE_CLASS)
>  			flags &= ~PIPE_CONTROL_3D_ENGINE_FLAGS;
>  
> -		if (!HAS_FLAT_CCS(rq->engine->i915))
> +		if (HAS_AUX_CCS(rq->engine->i915))
>  			count = 8 + 4;
>  		else
>  			count = 8;
> @@ -307,7 +307,7 @@ int gen12_emit_flush_xcs(struct i915_request *rq, u32 
mode)
>  	if (mode & EMIT_INVALIDATE) {
>  		cmd += 2;
>  
> -		if (!HAS_FLAT_CCS(rq->engine->i915) &&
> +		if (HAS_AUX_CCS(rq->engine->i915) &&
>  		    (rq->engine->class == VIDEO_DECODE_CLASS ||
>  		     rq->engine->class == VIDEO_ENHANCEMENT_CLASS)) {
>  			aux_inv = rq->engine->mask &
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/
i915_drv.h
> index 682ef2b5c7d59..e9cc048b5727a 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -848,6 +848,7 @@ IS_SUBPLATFORM(const struct drm_i915_private *i915,
>   * stored in lmem to support the 3D and media compression formats.
>   */
>  #define HAS_FLAT_CCS(i915)   (INTEL_INFO(i915)->has_flat_ccs)
> +#define HAS_AUX_CCS(i915)    (INTEL_INFO(i915)->has_aux_ccs)
>  
>  #define HAS_GT_UC(i915)	(INTEL_INFO(i915)->has_gt_uc)
>  
> diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/
i915_pci.c
> index fcacdc21643cf..c9ff1d11a9fce 100644
> --- a/drivers/gpu/drm/i915/i915_pci.c
> +++ b/drivers/gpu/drm/i915/i915_pci.c
> @@ -643,7 +643,8 @@ static const struct intel_device_info jsl_info = {
>  	TGL_CACHELEVEL, \
>  	.has_global_mocs = 1, \
>  	.has_pxp = 1, \
> -	.max_pat_index = 3
> +	.max_pat_index = 3, \
> +	.has_aux_ccs = 1

NIT: Can we please have the last element also followed by comma, like in other 
     places (e.g. see below)?  That will simplify future patches.

Other than that, LGTM.

Thanks,
Janusz

>  
>  static const struct intel_device_info tgl_info = {
>  	GEN12_FEATURES,
> @@ -775,6 +776,7 @@ static const struct intel_device_info dg2_info = {
>  
>  static const struct intel_device_info ats_m_info = {
>  	DG2_FEATURES,
> +	.has_aux_ccs = 1,
>  	.require_force_probe = 1,
>  	.tuning_thread_rr_after_dep = 1,
>  };
> @@ -827,6 +829,7 @@ static const struct intel_device_info mtl_info = {
>  	.__runtime.media.ip.ver = 13,
>  	PLATFORM(INTEL_METEORLAKE),
>  	.extra_gt_list = xelpmp_extra_gt,
> +	.has_aux_ccs = 1,
>  	.has_flat_ccs = 0,
>  	.has_gmd_id = 1,
>  	.has_guc_deprivilege = 1,
> diff --git a/drivers/gpu/drm/i915/intel_device_info.h b/drivers/gpu/drm/
i915/intel_device_info.h
> index dbfe6443457b5..93485507506cc 100644
> --- a/drivers/gpu/drm/i915/intel_device_info.h
> +++ b/drivers/gpu/drm/i915/intel_device_info.h
> @@ -151,6 +151,7 @@ enum intel_ppgtt_type {
>  	func(has_reset_engine); \
>  	func(has_3d_pipeline); \
>  	func(has_4tile); \
> +	func(has_aux_ccs); \
>  	func(has_flat_ccs); \
>  	func(has_global_mocs); \
>  	func(has_gmd_id); \
> 

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