Commit 9fb34737 authored by Michał Winiarski's avatar Michał Winiarski Committed by John Harrison
Browse files

drm/i915/guc: Route semaphores to GuC for Gen12+ 



In GuC submission mode, there is an option to use auto-switch out
semaphores and have GuC auto-switch in a waiting context. This
requires routing the semaphore interrupt to GuC.

Signed-off-by: default avatarMichał Winiarski <michal.winiarski@intel.com>
Signed-off-by: default avatarJohn Harrison <John.C.Harrison@Intel.com>
Reviewed-by: default avatarMatthew Brost <matthew.brost@intel.com>
Reviewed-by: default avatarDaniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220728024225.2363663-2-John.C.Harrison@Intel.com
parent 22645976

drivers/gpu/drm/i915/gt/uc/intel_guc_reg.h

+4 −0
Original line number Diff line number Diff line
@@ -102,6 +102,10 @@ 
#define   GUC_SEND_TRIGGER		  (1<<0)

#define GEN11_GUC_HOST_INTERRUPT	_MMIO(0x1901f0)



#define GEN12_GUC_SEM_INTR_ENABLES	_MMIO(0xc71c)

#define   GUC_SEM_INTR_ROUTE_TO_GUC	BIT(31)

#define   GUC_SEM_INTR_ENABLE_ALL	(0xff)



#define GUC_NUM_DOORBELLS		256



/* format of the HW-monitored doorbell cacheline */

drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c

+14 −0
Original line number Diff line number Diff line
@@ -4191,13 +4191,27 @@ int intel_guc_submission_setup(struct intel_engine_cs *engine) 


void intel_guc_submission_enable(struct intel_guc *guc)

{

	struct intel_gt *gt = guc_to_gt(guc);



	/* Enable and route to GuC */

	if (GRAPHICS_VER(gt->i915) >= 12)

		intel_uncore_write(gt->uncore, GEN12_GUC_SEM_INTR_ENABLES,

				   GUC_SEM_INTR_ROUTE_TO_GUC |

				   GUC_SEM_INTR_ENABLE_ALL);



	guc_init_lrc_mapping(guc);

	guc_init_engine_stats(guc);

}



void intel_guc_submission_disable(struct intel_guc *guc)

{

	struct intel_gt *gt = guc_to_gt(guc);



	/* Note: By the time we're here, GuC may have already been reset */



	/* Disable and route to host */

	if (GRAPHICS_VER(gt->i915) >= 12)

		intel_uncore_write(gt->uncore, GEN12_GUC_SEM_INTR_ENABLES, 0x0);

}



static bool __guc_submission_supported(struct intel_guc *guc)