[PATCH 6/7] drm/i915/guc: define media GT GuC send regs

[John Harrison]

On 9/22/2022 15:11, Daniele Ceraolo Spurio wrote:
> The media GT shares the G-unit with the root GT, so a second set of
> communication registers is required for the media GuC.
>
> Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
> Cc: John Harrison <John.C.Harrison at Intel.com>
> Cc: Alan Previn <alan.previn.teres.alexis at intel.com>
Reviewed-by: John Harrison <John.C.Harrison at Intel.com>

> ---
>   drivers/gpu/drm/i915/gt/uc/intel_guc.c     | 14 ++++++++++----
>   drivers/gpu/drm/i915/gt/uc/intel_guc_reg.h |  2 ++
>   2 files changed, 12 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
> index bac06e3d6f2c..b0beab44b34c 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc.c
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
> @@ -156,7 +156,8 @@ static void gen11_disable_guc_interrupts(struct intel_guc *guc)
>   
>   void intel_guc_init_early(struct intel_guc *guc)
>   {
> -	struct drm_i915_private *i915 = guc_to_gt(guc)->i915;
> +	struct intel_gt *gt = guc_to_gt(guc);
> +	struct drm_i915_private *i915 = gt->i915;
>   
>   	intel_uc_fw_init_early(&guc->fw, INTEL_UC_FW_TYPE_GUC);
>   	intel_guc_ct_init_early(&guc->ct);
> @@ -168,12 +169,17 @@ void intel_guc_init_early(struct intel_guc *guc)
>   	mutex_init(&guc->send_mutex);
>   	spin_lock_init(&guc->irq_lock);
>   	if (GRAPHICS_VER(i915) >= 11) {
> -		guc->notify_reg = GEN11_GUC_HOST_INTERRUPT;
>   		guc->interrupts.reset = gen11_reset_guc_interrupts;
>   		guc->interrupts.enable = gen11_enable_guc_interrupts;
>   		guc->interrupts.disable = gen11_disable_guc_interrupts;
> -		guc->send_regs.base =
> -			i915_mmio_reg_offset(GEN11_SOFT_SCRATCH(0));
> +		if (gt->type == GT_MEDIA) {
> +			guc->notify_reg = MEDIA_GUC_HOST_INTERRUPT;
> +			guc->send_regs.base = i915_mmio_reg_offset(MEDIA_SOFT_SCRATCH(0));
> +		} else {
> +			guc->notify_reg = GEN11_GUC_HOST_INTERRUPT;
> +			guc->send_regs.base = i915_mmio_reg_offset(GEN11_SOFT_SCRATCH(0));
> +		}
> +
>   		guc->send_regs.count = GEN11_SOFT_SCRATCH_COUNT;
>   
>   	} else {
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_reg.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_reg.h
> index a7092f711e9c..9915de32e894 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_reg.h
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_reg.h
> @@ -36,6 +36,7 @@
>   #define SOFT_SCRATCH_COUNT		16
>   
>   #define GEN11_SOFT_SCRATCH(n)		_MMIO(0x190240 + (n) * 4)
> +#define MEDIA_SOFT_SCRATCH(n)		_MMIO(0x190310 + (n) * 4)
>   #define GEN11_SOFT_SCRATCH_COUNT	4
>   
>   #define UOS_RSA_SCRATCH(i)		_MMIO(0xc200 + (i) * 4)
> @@ -101,6 +102,7 @@
>   #define GUC_SEND_INTERRUPT		_MMIO(0xc4c8)
>   #define   GUC_SEND_TRIGGER		  (1<<0)
>   #define GEN11_GUC_HOST_INTERRUPT	_MMIO(0x1901f0)
> +#define MEDIA_GUC_HOST_INTERRUPT	_MMIO(0x190304)
>   
>   #define GEN12_GUC_SEM_INTR_ENABLES	_MMIO(0xc71c)
>   #define   GUC_SEM_INTR_ROUTE_TO_GUC	BIT(31)