From: Michał Winiarski <michal.winiarski@xxxxxxxxx>
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@xxxxxxxxx>
Signed-off-by: John Harrison <John.C.Harrison@xxxxxxxxx>
Reviewed-by: Matthew Brost <matthew.brost@xxxxxxxxx>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>
---
drivers/gpu/drm/i915/gt/uc/intel_guc_reg.h | 4 ++++
drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 14 ++++++++++++++
2 files changed, 18 insertions(+)
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 8dc063f087eb1..a7092f711e9cd 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_reg.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_reg.h
@@ -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 */
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
index 76916aed897ad..0b8c6450fa344 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -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)
--
2.37.1
