drm/i915/guc: Move GuC boot param initialization out of xfer

We want to keep ucode xfer functions separate from other
initialization. Once separated, add explicit forcewake.

v2: use BLITTER domain only and add comment (Daniele)

Suggested-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> #1
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171016144724.17244-3-michal.wajdeczko@intel.com

drivers/gpu/drm/i915/intel_guc.c

@@ -67,6 +67,98 @@ void intel_guc_init_early(struct intel_guc *guc)
 	guc->notify = gen8_guc_raise_irq;
 }
 
+static u32 get_gttype(struct drm_i915_private *dev_priv)
+{
+	/* XXX: GT type based on PCI device ID? field seems unused by fw */
+	return 0;
+}
+
+static u32 get_core_family(struct drm_i915_private *dev_priv)
+{
+	u32 gen = INTEL_GEN(dev_priv);
+
+	switch (gen) {
+	case 9:
+		return GUC_CORE_FAMILY_GEN9;
+
+	default:
+		MISSING_CASE(gen);
+		return GUC_CORE_FAMILY_UNKNOWN;
+	}
+}
+
+/*
+ * Initialise the GuC parameter block before starting the firmware
+ * transfer. These parameters are read by the firmware on startup
+ * and cannot be changed thereafter.
+ */
+void intel_guc_init_params(struct intel_guc *guc)
+{
+	struct drm_i915_private *dev_priv = guc_to_i915(guc);
+	u32 params[GUC_CTL_MAX_DWORDS];
+	int i;
+
+	memset(&params, 0, sizeof(params));
+
+	params[GUC_CTL_DEVICE_INFO] |=
+		(get_gttype(dev_priv) << GUC_CTL_GTTYPE_SHIFT) |
+		(get_core_family(dev_priv) << GUC_CTL_COREFAMILY_SHIFT);
+
+	/*
+	 * GuC ARAT increment is 10 ns. GuC default scheduler quantum is one
+	 * second. This ARAR is calculated by:
+	 * Scheduler-Quantum-in-ns / ARAT-increment-in-ns = 1000000000 / 10
+	 */
+	params[GUC_CTL_ARAT_HIGH] = 0;
+	params[GUC_CTL_ARAT_LOW] = 100000000;
+
+	params[GUC_CTL_WA] |= GUC_CTL_WA_UK_BY_DRIVER;
+
+	params[GUC_CTL_FEATURE] |= GUC_CTL_DISABLE_SCHEDULER |
+			GUC_CTL_VCS2_ENABLED;
+
+	params[GUC_CTL_LOG_PARAMS] = guc->log.flags;
+
+	if (i915_modparams.guc_log_level >= 0) {
+		params[GUC_CTL_DEBUG] =
+			i915_modparams.guc_log_level << GUC_LOG_VERBOSITY_SHIFT;
+	} else
+		params[GUC_CTL_DEBUG] = GUC_LOG_DISABLED;
+
+	/* If GuC submission is enabled, set up additional parameters here */
+	if (i915_modparams.enable_guc_submission) {
+		u32 ads = guc_ggtt_offset(guc->ads_vma) >> PAGE_SHIFT;
+		u32 pgs = guc_ggtt_offset(dev_priv->guc.stage_desc_pool);
+		u32 ctx_in_16 = GUC_MAX_STAGE_DESCRIPTORS / 16;
+
+		params[GUC_CTL_DEBUG] |= ads << GUC_ADS_ADDR_SHIFT;
+		params[GUC_CTL_DEBUG] |= GUC_ADS_ENABLED;
+
+		pgs >>= PAGE_SHIFT;
+		params[GUC_CTL_CTXINFO] = (pgs << GUC_CTL_BASE_ADDR_SHIFT) |
+			(ctx_in_16 << GUC_CTL_CTXNUM_IN16_SHIFT);
+
+		params[GUC_CTL_FEATURE] |= GUC_CTL_KERNEL_SUBMISSIONS;
+
+		/* Unmask this bit to enable the GuC's internal scheduler */
+		params[GUC_CTL_FEATURE] &= ~GUC_CTL_DISABLE_SCHEDULER;
+	}
+
+	/*
+	 * All SOFT_SCRATCH registers are in FORCEWAKE_BLITTER domain and
+	 * they are power context saved so it's ok to release forcewake
+	 * when we are done here and take it again at xfer time.
+	 */
+	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_BLITTER);
+
+	I915_WRITE(SOFT_SCRATCH(0), 0);
+
+	for (i = 0; i < GUC_CTL_MAX_DWORDS; i++)
+		I915_WRITE(SOFT_SCRATCH(1 + i), params[i]);
+
+	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_BLITTER);
+}
+
 int intel_guc_send_nop(struct intel_guc *guc, const u32 *action, u32 len)
 {
 	WARN(1, "Unexpected send: action=%#x\n", *action);

drivers/gpu/drm/i915/intel_guc.h

@@ -95,6 +95,7 @@ static inline u32 guc_ggtt_offset(struct i915_vma *vma)
 
 void intel_guc_init_early(struct intel_guc *guc);
 void intel_guc_init_send_regs(struct intel_guc *guc);
+void intel_guc_init_params(struct intel_guc *guc);
 int intel_guc_send_nop(struct intel_guc *guc, const u32 *action, u32 len);
 int intel_guc_send_mmio(struct intel_guc *guc, const u32 *action, u32 len);
 int intel_guc_sample_forcewake(struct intel_guc *guc);

drivers/gpu/drm/i915/intel_guc_loader.c

@@ -79,89 +79,6 @@ MODULE_FIRMWARE(I915_KBL_GUC_UCODE);
 #define I915_GLK_GUC_UCODE GUC_FW_PATH(glk, GLK_FW_MAJOR, GLK_FW_MINOR)
 
 
-static u32 get_gttype(struct drm_i915_private *dev_priv)
-{
-	/* XXX: GT type based on PCI device ID? field seems unused by fw */
-	return 0;
-}
-
-static u32 get_core_family(struct drm_i915_private *dev_priv)
-{
-	u32 gen = INTEL_GEN(dev_priv);
-
-	switch (gen) {
-	case 9:
-		return GUC_CORE_FAMILY_GEN9;
-
-	default:
-		MISSING_CASE(gen);
-		return GUC_CORE_FAMILY_UNKNOWN;
-	}
-}
-
-/*
- * Initialise the GuC parameter block before starting the firmware
- * transfer. These parameters are read by the firmware on startup
- * and cannot be changed thereafter.
- */
-static void guc_params_init(struct drm_i915_private *dev_priv)
-{
-	struct intel_guc *guc = &dev_priv->guc;
-	u32 params[GUC_CTL_MAX_DWORDS];
-	int i;
-
-	memset(&params, 0, sizeof(params));
-
-	params[GUC_CTL_DEVICE_INFO] |=
-		(get_gttype(dev_priv) << GUC_CTL_GTTYPE_SHIFT) |
-		(get_core_family(dev_priv) << GUC_CTL_COREFAMILY_SHIFT);
-
-	/*
-	 * GuC ARAT increment is 10 ns. GuC default scheduler quantum is one
-	 * second. This ARAR is calculated by:
-	 * Scheduler-Quantum-in-ns / ARAT-increment-in-ns = 1000000000 / 10
-	 */
-	params[GUC_CTL_ARAT_HIGH] = 0;
-	params[GUC_CTL_ARAT_LOW] = 100000000;
-
-	params[GUC_CTL_WA] |= GUC_CTL_WA_UK_BY_DRIVER;
-
-	params[GUC_CTL_FEATURE] |= GUC_CTL_DISABLE_SCHEDULER |
-			GUC_CTL_VCS2_ENABLED;
-
-	params[GUC_CTL_LOG_PARAMS] = guc->log.flags;
-
-	if (i915_modparams.guc_log_level >= 0) {
-		params[GUC_CTL_DEBUG] =
-			i915_modparams.guc_log_level << GUC_LOG_VERBOSITY_SHIFT;
-	} else
-		params[GUC_CTL_DEBUG] = GUC_LOG_DISABLED;
-
-	/* If GuC submission is enabled, set up additional parameters here */
-	if (i915_modparams.enable_guc_submission) {
-		u32 ads = guc_ggtt_offset(guc->ads_vma) >> PAGE_SHIFT;
-		u32 pgs = guc_ggtt_offset(dev_priv->guc.stage_desc_pool);
-		u32 ctx_in_16 = GUC_MAX_STAGE_DESCRIPTORS / 16;
-
-		params[GUC_CTL_DEBUG] |= ads << GUC_ADS_ADDR_SHIFT;
-		params[GUC_CTL_DEBUG] |= GUC_ADS_ENABLED;
-
-		pgs >>= PAGE_SHIFT;
-		params[GUC_CTL_CTXINFO] = (pgs << GUC_CTL_BASE_ADDR_SHIFT) |
-			(ctx_in_16 << GUC_CTL_CTXNUM_IN16_SHIFT);
-
-		params[GUC_CTL_FEATURE] |= GUC_CTL_KERNEL_SUBMISSIONS;
-
-		/* Unmask this bit to enable the GuC's internal scheduler */
-		params[GUC_CTL_FEATURE] &= ~GUC_CTL_DISABLE_SCHEDULER;
-	}
-
-	I915_WRITE(SOFT_SCRATCH(0), 0);
-
-	for (i = 0; i < GUC_CTL_MAX_DWORDS; i++)
-		I915_WRITE(SOFT_SCRATCH(1 + i), params[i]);
-}
-
 /*
  * Read the GuC status register (GUC_STATUS) and store it in the
  * specified location; then return a boolean indicating whether
@@ -301,8 +218,6 @@ static int guc_ucode_xfer(struct drm_i915_private *dev_priv)
 		I915_WRITE(GUC_ARAT_C6DIS, 0x1FF);
 	}
 
-	guc_params_init(dev_priv);
-
 	ret = guc_ucode_xfer_dma(dev_priv, vma);
 
 	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);

drivers/gpu/drm/i915/intel_uc.c

@@ -195,6 +195,7 @@ int intel_uc_init_hw(struct drm_i915_private *dev_priv)
 			goto err_submission;
 
 		intel_huc_init_hw(&dev_priv->huc);
+		intel_guc_init_params(guc);
 		ret = intel_guc_init_hw(&dev_priv->guc);
 		if (ret == 0 || ret != -EAGAIN)
 			break;