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

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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: Michał Winiarski <michal.winiarski@intel.com>
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220728024225.2363663-2-John.C.Harrison@Intel.com
This commit is contained in:
Michał Winiarski 2022-07-27 19:42:20 -07:00 committed by John Harrison
parent 22645976ae
commit 9fb3473732
2 changed files with 18 additions and 0 deletions
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4
drivers/gpu/drm/i915/gt/uc/intel_guc_reg.h
View File

@ -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 */

14
drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
View File

@ -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)