We have to specify in the Render Control Unit Mode register
when CCS is enabled.
Bspec: 46034
Original-patch-by: Michel Thierry
Cc: Daniele Ceraolo Spurio <daniele.ceraolospu...@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursu...@linux.intel.com>
Cc: Vinay Belgaumkar <vinay.belgaum...@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospu...@intel.com>
Signed-off-by: Aravind Iddamsetty <aravind.iddamse...@intel.com>
Signed-off-by: Matt Roper <matthew.d.ro...@intel.com>
---
.../drm/i915/gt/intel_execlists_submission.c | 26 +++++++++++++++++++
.../gpu/drm/i915/gt/uc/intel_guc_submission.c | 26 +++++++++++++++++++
drivers/gpu/drm/i915/i915_reg.h | 3 +++
3 files changed, 55 insertions(+)
diff --git a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
index 2b36ec7f3a04..046f7da67ba6 100644
--- a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
+++ b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
@@ -2874,6 +2874,29 @@ static int execlists_resume(struct intel_engine_cs
*engine)
return 0;
}
+static int gen12_rcs_resume(struct intel_engine_cs *engine)
+{
+ int ret;
+
+ ret = execlists_resume(engine);
+ if (ret)
+ return ret;
+
+ /*
+ * Multi Context programming.
+ * just need to program this register once no matter how many CCS
+ * engines there are. Since some of the CCS engines might be fused off,
+ * we can't do this as part of the init of a specific CCS and we do
+ * it during RCS init instead. RCS and all CCS engines are reset
+ * together, so post-reset re-init is covered as well.
+ */
+ if (CCS_MASK(engine->gt))
+ intel_uncore_write(engine->uncore, GEN12_RCU_MODE,
+ _MASKED_BIT_ENABLE(GEN12_RCU_MODE_CCS_ENABLE));
+
+ return 0;
+}
+
static void execlists_reset_prepare(struct intel_engine_cs *engine)
{
ENGINE_TRACE(engine, "depth<-%d\n",
@@ -3394,6 +3417,9 @@ static void rcs_submission_override(struct
intel_engine_cs *engine)
engine->emit_fini_breadcrumb = gen8_emit_fini_breadcrumb_rcs;
break;
}
+
+ if (engine->class == RENDER_CLASS)
+ engine->resume = gen12_rcs_resume;
}
int intel_execlists_submission_setup(struct intel_engine_cs *engine)
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 2f5bf7aa7e3b..db956255d076 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -2350,6 +2350,29 @@ static bool guc_sched_engine_disabled(struct
i915_sched_engine *sched_engine)
return !sched_engine->tasklet.callback;
}
+static int gen12_rcs_resume(struct intel_engine_cs *engine)
+{
+ int ret;
+
+ ret = guc_resume(engine);
+ if (ret)
+ return ret;
+
+ /*
+ * Multi Context programming.
+ * just need to program this register once no matter how many CCS
+ * engines there are. Since some of the CCS engines might be fused off,
+ * we can't do this as part of the init of a specific CCS and we do
+ * it during RCS init instead. RCS and all CCS engines are reset
+ * together, so post-reset re-init is covered as well.
+ */
+ if (CCS_MASK(engine->gt))
+ intel_uncore_write(engine->uncore, GEN12_RCU_MODE,
+ _MASKED_BIT_ENABLE(GEN12_RCU_MODE_CCS_ENABLE));
+
+ return 0;
+}
+
static void guc_set_default_submission(struct intel_engine_cs *engine)
{
engine->submit_request = guc_submit_request;
@@ -2464,6 +2487,9 @@ static void rcs_submission_override(struct
intel_engine_cs *engine)
engine->emit_fini_breadcrumb = gen8_emit_fini_breadcrumb_rcs;
break;
}
+
+ if (engine->class == RENDER_CLASS)
+ engine->resume = gen12_rcs_resume;
}
static inline void guc_default_irqs(struct intel_engine_cs *engine)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 5b68c02c35af..57f9456f8c61 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -498,6 +498,9 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
#define ECOBITS_PPGTT_CACHE64B (3 << 8)
#define ECOBITS_PPGTT_CACHE4B (0 << 8)
+#define GEN12_RCU_MODE _MMIO(0x14800)
+#define GEN12_RCU_MODE_CCS_ENABLE REG_BIT(0)
+
#define GAB_CTL _MMIO(0x24000)
#define GAB_CTL_CONT_AFTER_PAGEFAULT (1 << 8)
--
2.25.4
