drm/i915: Stop using I915_READ/WRITE in intel_wopcm_init_hw

More legacy mmio accessor removal. We pass in intel_gt explicitly allowing
code to use new intel_uncore_read/write helpers.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190621070811.7006-17-tvrtko.ursulin@linux.intel.com

drivers/gpu/drm/i915/i915_gem.c

@@ -1272,7 +1272,7 @@ static int init_hw(struct intel_gt *gt)
 		goto out;
 	}
 
-	ret = intel_wopcm_init_hw(&i915->wopcm);
+	ret = intel_wopcm_init_hw(&i915->wopcm, gt);
 	if (ret) {
 		DRM_ERROR("Enabling WOPCM failed (%d)\n", ret);
 		goto out;

drivers/gpu/drm/i915/intel_wopcm.c

@@ -225,17 +225,18 @@ int intel_wopcm_init(struct intel_wopcm *wopcm)
 	return 0;
 }
 
-static inline int write_and_verify(struct drm_i915_private *dev_priv,
-				   i915_reg_t reg, u32 val, u32 mask,
-				   u32 locked_bit)
+static int
+write_and_verify(struct intel_gt *gt,
+		 i915_reg_t reg, u32 val, u32 mask, u32 locked_bit)
 {
+	struct intel_uncore *uncore = gt->uncore;
 	u32 reg_val;
 
 	GEM_BUG_ON(val & ~mask);
 
-	I915_WRITE(reg, val);
+	intel_uncore_write(uncore, reg, val);
 
-	reg_val = I915_READ(reg);
+	reg_val = intel_uncore_read(uncore, reg);
 
 	return (reg_val & mask) != (val | locked_bit) ? -EIO : 0;
 }
@@ -250,29 +251,30 @@ static inline int write_and_verify(struct drm_i915_private *dev_priv,
  *
  * Return: 0 on success. -EIO if registers were locked with incorrect values.
  */
-int intel_wopcm_init_hw(struct intel_wopcm *wopcm)
+int intel_wopcm_init_hw(struct intel_wopcm *wopcm, struct intel_gt *gt)
 {
-	struct drm_i915_private *dev_priv = wopcm_to_i915(wopcm);
+	struct drm_i915_private *i915 = wopcm_to_i915(wopcm);
+	struct intel_uncore *uncore = gt->uncore;
 	u32 huc_agent;
 	u32 mask;
 	int err;
 
-	if (!USES_GUC(dev_priv))
+	if (!USES_GUC(i915))
 		return 0;
 
-	GEM_BUG_ON(!HAS_GUC(dev_priv));
+	GEM_BUG_ON(!HAS_GUC(i915));
 	GEM_BUG_ON(!wopcm->guc.size);
 	GEM_BUG_ON(!wopcm->guc.base);
 
-	err = write_and_verify(dev_priv, GUC_WOPCM_SIZE, wopcm->guc.size,
+	err = write_and_verify(gt, GUC_WOPCM_SIZE, wopcm->guc.size,
 			       GUC_WOPCM_SIZE_MASK | GUC_WOPCM_SIZE_LOCKED,
 			       GUC_WOPCM_SIZE_LOCKED);
 	if (err)
 		goto err_out;
 
-	huc_agent = USES_HUC(dev_priv) ? HUC_LOADING_AGENT_GUC : 0;
+	huc_agent = USES_HUC(i915) ? HUC_LOADING_AGENT_GUC : 0;
 	mask = GUC_WOPCM_OFFSET_MASK | GUC_WOPCM_OFFSET_VALID | huc_agent;
-	err = write_and_verify(dev_priv, DMA_GUC_WOPCM_OFFSET,
+	err = write_and_verify(gt, DMA_GUC_WOPCM_OFFSET,
 			       wopcm->guc.base | huc_agent, mask,
 			       GUC_WOPCM_OFFSET_VALID);
 	if (err)
@@ -283,8 +285,9 @@ int intel_wopcm_init_hw(struct intel_wopcm *wopcm)
 err_out:
 	DRM_ERROR("Failed to init WOPCM registers:\n");
 	DRM_ERROR("DMA_GUC_WOPCM_OFFSET=%#x\n",
-		  I915_READ(DMA_GUC_WOPCM_OFFSET));
-	DRM_ERROR("GUC_WOPCM_SIZE=%#x\n", I915_READ(GUC_WOPCM_SIZE));
+		  intel_uncore_read(uncore, DMA_GUC_WOPCM_OFFSET));
+	DRM_ERROR("GUC_WOPCM_SIZE=%#x\n",
+		  intel_uncore_read(uncore, GUC_WOPCM_SIZE));
 
 	return err;
 }

drivers/gpu/drm/i915/intel_wopcm.h

@@ -9,6 +9,8 @@
 
 #include <linux/types.h>
 
+struct intel_gt;
+
 /**
  * struct intel_wopcm - Overall WOPCM info and WOPCM regions.
  * @size: Size of overall WOPCM.
@@ -41,6 +43,6 @@ static inline u32 intel_wopcm_guc_size(struct intel_wopcm *wopcm)
 
 void intel_wopcm_init_early(struct intel_wopcm *wopcm);
 int intel_wopcm_init(struct intel_wopcm *wopcm);
-int intel_wopcm_init_hw(struct intel_wopcm *wopcm);
+int intel_wopcm_init_hw(struct intel_wopcm *wopcm, struct intel_gt *gt);
 
 #endif