drm/i915: Turn __raw_i915_read8() & co. in to inline functions

There's no need for __raw_i915_read8() & co. to be macros, so make them
inline functions. To avoid typo mistakes generate the inline functions
using preprocessor templates.

We have a few users of the raw register acces functions outside
intel_uncore.c, so let's also move the functions into intel_drv.h.

While doing that switch I915_READ_FW() & co. to use the
__raw_i915_read() functions, and use the _FW macros everywhere
outside intel_uncore.c where we want to read registers without
grabbing forcewake and whatnot. The only exception is
i915_check_vgpu() which itself gets called from intel_uncore.c,
so using the __raw_i915_read stuff there seems appropriate.

v2: Squash in the intel_uncore.c->i915_drv.h move
    Convert I915_READ_FW() to use __raw_i915_read(), and use
    I915_READ_FW() outside of intel_uncore.c (Chris)

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1445517300-28173-2-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>

drivers/gpu/drm/i915/i915_debugfs.c

@@ -1524,7 +1524,7 @@ static int gen6_drpc_info(struct seq_file *m)
 		seq_printf(m, "RC information accurate: %s\n", yesno(count < 51));
 	}
 
-	gt_core_status = readl(dev_priv->regs + GEN6_GT_CORE_STATUS);
+	gt_core_status = I915_READ_FW(GEN6_GT_CORE_STATUS);
 	trace_i915_reg_rw(false, GEN6_GT_CORE_STATUS, gt_core_status, 4, true);
 
 	rpmodectl1 = I915_READ(GEN6_RP_CONTROL);

drivers/gpu/drm/i915/i915_drv.h

@@ -3453,6 +3453,32 @@ int intel_freq_opcode(struct drm_i915_private *dev_priv, int val);
 #define POSTING_READ(reg)	(void)I915_READ_NOTRACE(reg)
 #define POSTING_READ16(reg)	(void)I915_READ16_NOTRACE(reg)
 
+#define __raw_read(x, s) \
+static inline uint##x##_t __raw_i915_read##x(struct drm_i915_private *dev_priv, \
+					     uint32_t reg) \
+{ \
+	return read##s(dev_priv->regs + reg); \
+}
+
+#define __raw_write(x, s) \
+static inline void __raw_i915_write##x(struct drm_i915_private *dev_priv, \
+				       uint32_t reg, uint##x##_t val) \
+{ \
+	write##s(val, dev_priv->regs + reg); \
+}
+__raw_read(8, b)
+__raw_read(16, w)
+__raw_read(32, l)
+__raw_read(64, q)
+
+__raw_write(8, b)
+__raw_write(16, w)
+__raw_write(32, l)
+__raw_write(64, q)
+
+#undef __raw_read
+#undef __raw_write
+
 /* These are untraced mmio-accessors that are only valid to be used inside
  * criticial sections inside IRQ handlers where forcewake is explicitly
  * controlled.
@@ -3460,8 +3486,8 @@ int intel_freq_opcode(struct drm_i915_private *dev_priv, int val);
  * Note: Should only be used between intel_uncore_forcewake_irqlock() and
  * intel_uncore_forcewake_irqunlock().
  */
-#define I915_READ_FW(reg__) readl(dev_priv->regs + (reg__))
-#define I915_WRITE_FW(reg__, val__) writel(val__, dev_priv->regs + (reg__))
+#define I915_READ_FW(reg__) __raw_i915_read32(dev_priv, (reg__))
+#define I915_WRITE_FW(reg__, val__) __raw_i915_write32(dev_priv, (reg__), (val__))
 #define POSTING_READ_FW(reg__) (void)I915_READ_FW(reg__)
 
 /* "Broadcast RGB" property */

drivers/gpu/drm/i915/i915_irq.c

@@ -717,9 +717,7 @@ static u32 g4x_get_vblank_counter(struct drm_device *dev, int pipe)
 	return I915_READ(PIPE_FRMCOUNT_G4X(pipe));
 }
 
-/* raw reads, only for fast reads of display block, no need for forcewake etc. */
-#define __raw_i915_read32(dev_priv__, reg__) readl((dev_priv__)->regs + (reg__))
-
+/* I915_READ_FW, only for fast reads of display block, no need for forcewake etc. */
 static int __intel_get_crtc_scanline(struct intel_crtc *crtc)
 {
 	struct drm_device *dev = crtc->base.dev;
@@ -733,9 +731,9 @@ static int __intel_get_crtc_scanline(struct intel_crtc *crtc)
 		vtotal /= 2;
 
 	if (IS_GEN2(dev))
-		position = __raw_i915_read32(dev_priv, PIPEDSL(pipe)) & DSL_LINEMASK_GEN2;
+		position = I915_READ_FW(PIPEDSL(pipe)) & DSL_LINEMASK_GEN2;
 	else
-		position = __raw_i915_read32(dev_priv, PIPEDSL(pipe)) & DSL_LINEMASK_GEN3;
+		position = I915_READ_FW(PIPEDSL(pipe)) & DSL_LINEMASK_GEN3;
 
 	/*
 	 * On HSW, the DSL reg (0x70000) appears to return 0 if we
@@ -827,7 +825,7 @@ static int i915_get_crtc_scanoutpos(struct drm_device *dev, int pipe,
 		 * We can split this into vertical and horizontal
 		 * scanout position.
 		 */
-		position = (__raw_i915_read32(dev_priv, PIPEFRAMEPIXEL(pipe)) & PIPE_PIXEL_MASK) >> PIPE_PIXEL_SHIFT;
+		position = (I915_READ_FW(PIPEFRAMEPIXEL(pipe)) & PIPE_PIXEL_MASK) >> PIPE_PIXEL_SHIFT;
 
 		/* convert to pixel counts */
 		vbl_start *= htotal;

drivers/gpu/drm/i915/i915_vgpu.c

@@ -69,13 +69,13 @@ void i915_check_vgpu(struct drm_device *dev)
 	if (!IS_HASWELL(dev))
 		return;
 
-	magic = readq(dev_priv->regs + vgtif_reg(magic));
+	magic = __raw_i915_read64(dev_priv, vgtif_reg(magic));
 	if (magic != VGT_MAGIC)
 		return;
 
 	version = INTEL_VGT_IF_VERSION_ENCODE(
-		readw(dev_priv->regs + vgtif_reg(version_major)),
-		readw(dev_priv->regs + vgtif_reg(version_minor)));
+		__raw_i915_read16(dev_priv, vgtif_reg(version_major)),
+		__raw_i915_read16(dev_priv, vgtif_reg(version_minor)));
 	if (version != INTEL_VGT_IF_VERSION) {
 		DRM_INFO("VGT interface version mismatch!\n");
 		return;

drivers/gpu/drm/i915/intel_uncore.c

@@ -29,19 +29,7 @@
 
 #define FORCEWAKE_ACK_TIMEOUT_MS 50
 
-#define __raw_i915_read8(dev_priv__, reg__) readb((dev_priv__)->regs + (reg__))
-#define __raw_i915_write8(dev_priv__, reg__, val__) writeb(val__, (dev_priv__)->regs + (reg__))
-
-#define __raw_i915_read16(dev_priv__, reg__) readw((dev_priv__)->regs + (reg__))
-#define __raw_i915_write16(dev_priv__, reg__, val__) writew(val__, (dev_priv__)->regs + (reg__))
-
-#define __raw_i915_read32(dev_priv__, reg__) readl((dev_priv__)->regs + (reg__))
-#define __raw_i915_write32(dev_priv__, reg__, val__) writel(val__, (dev_priv__)->regs + (reg__))
-
-#define __raw_i915_read64(dev_priv__, reg__) readq((dev_priv__)->regs + (reg__))
-#define __raw_i915_write64(dev_priv__, reg__, val__) writeq(val__, (dev_priv__)->regs + (reg__))
-
-#define __raw_posting_read(dev_priv__, reg__) (void)__raw_i915_read32(dev_priv__, reg__)
+#define __raw_posting_read(dev_priv__, reg__) (void)__raw_i915_read32((dev_priv__), (reg__))
 
 static const char * const forcewake_domain_names[] = {
 	"render",