drm/i915: Use the common register access functions for NOTRACE variants

Detangle the confusion that NOTRACE variants of the register read/write
routines were directly using the raw register access. We need for those
routines to reuse the common code for serializing register access and
ensuring the correct register power states. This is only possible now
that the only routines that required raw access use their own API.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_drv.h

@@ -2134,7 +2134,7 @@ int vlv_gpu_freq(int ddr_freq, int val);
 int vlv_freq_opcode(int ddr_freq, int val);
 
 #define __i915_read(x) \
-	u##x i915_read##x(struct drm_i915_private *dev_priv, u32 reg);
+	u##x i915_read##x(struct drm_i915_private *dev_priv, u32 reg, bool trace);
 __i915_read(8)
 __i915_read(16)
 __i915_read(32)
@@ -2142,28 +2142,28 @@ __i915_read(64)
 #undef __i915_read
 
 #define __i915_write(x) \
-	void i915_write##x(struct drm_i915_private *dev_priv, u32 reg, u##x val);
+	void i915_write##x(struct drm_i915_private *dev_priv, u32 reg, u##x val, bool trace);
 __i915_write(8)
 __i915_write(16)
 __i915_write(32)
 __i915_write(64)
 #undef __i915_write
 
-#define I915_READ8(reg)		i915_read8(dev_priv, (reg))
-#define I915_WRITE8(reg, val)	i915_write8(dev_priv, (reg), (val))
+#define I915_READ8(reg)		i915_read8(dev_priv, (reg), true)
+#define I915_WRITE8(reg, val)	i915_write8(dev_priv, (reg), (val), true)
 
-#define I915_READ16(reg)	i915_read16(dev_priv, (reg))
-#define I915_WRITE16(reg, val)	i915_write16(dev_priv, (reg), (val))
-#define I915_READ16_NOTRACE(reg)	readw(dev_priv->regs + (reg))
-#define I915_WRITE16_NOTRACE(reg, val)	writew(val, dev_priv->regs + (reg))
+#define I915_READ16(reg)	i915_read16(dev_priv, (reg), true)
+#define I915_WRITE16(reg, val)	i915_write16(dev_priv, (reg), (val), true)
+#define I915_READ16_NOTRACE(reg)	i915_read16(dev_priv, (reg), false)
+#define I915_WRITE16_NOTRACE(reg, val)	i915_write16(dev_priv, (reg), (val), false)
 
-#define I915_READ(reg)		i915_read32(dev_priv, (reg))
-#define I915_WRITE(reg, val)	i915_write32(dev_priv, (reg), (val))
-#define I915_READ_NOTRACE(reg)		readl(dev_priv->regs + (reg))
-#define I915_WRITE_NOTRACE(reg, val)	writel(val, dev_priv->regs + (reg))
+#define I915_READ(reg)		i915_read32(dev_priv, (reg), true)
+#define I915_WRITE(reg, val)	i915_write32(dev_priv, (reg), (val), true)
+#define I915_READ_NOTRACE(reg)		i915_read32(dev_priv, (reg), false)
+#define I915_WRITE_NOTRACE(reg, val)	i915_write32(dev_priv, (reg), (val), false)
 
-#define I915_WRITE64(reg, val)	i915_write64(dev_priv, (reg), (val))
-#define I915_READ64(reg)	i915_read64(dev_priv, (reg))
+#define I915_WRITE64(reg, val)	i915_write64(dev_priv, (reg), (val), true)
+#define I915_READ64(reg)	i915_read64(dev_priv, (reg), true)
 
 #define POSTING_READ(reg)	(void)I915_READ_NOTRACE(reg)
 #define POSTING_READ16(reg)	(void)I915_READ16_NOTRACE(reg)

drivers/gpu/drm/i915/intel_uncore.c

@@ -343,7 +343,7 @@ hsw_unclaimed_reg_check(struct drm_i915_private *dev_priv, u32 reg)
 }
 
 #define __i915_read(x) \
-u##x i915_read##x(struct drm_i915_private *dev_priv, u32 reg) { \
+u##x i915_read##x(struct drm_i915_private *dev_priv, u32 reg, bool trace) { \
 	unsigned long irqflags; \
 	u##x val = 0; \
 	spin_lock_irqsave(&dev_priv->uncore.lock, irqflags); \
@@ -359,7 +359,7 @@ u##x i915_read##x(struct drm_i915_private *dev_priv, u32 reg) { \
 		val = __raw_i915_read##x(dev_priv, reg); \
 	} \
 	spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags); \
-	trace_i915_reg_rw(false, reg, val, sizeof(val)); \
+	if (trace) trace_i915_reg_rw(false, reg, val, sizeof(val)); \
 	return val; \
 }
 
@@ -370,10 +370,10 @@ __i915_read(64)
 #undef __i915_read
 
 #define __i915_write(x) \
-void i915_write##x(struct drm_i915_private *dev_priv, u32 reg, u##x val) { \
+void i915_write##x(struct drm_i915_private *dev_priv, u32 reg, u##x val, bool trace) { \
 	unsigned long irqflags; \
 	u32 __fifo_ret = 0; \
-	trace_i915_reg_rw(true, reg, val, sizeof(val)); \
+	if (trace) trace_i915_reg_rw(true, reg, val, sizeof(val)); \
 	spin_lock_irqsave(&dev_priv->uncore.lock, irqflags); \
 	if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
 		__fifo_ret = __gen6_gt_wait_for_fifo(dev_priv); \