[Intel-gfx] [RFC PATCH 6/8] drm/i915: redirect GTT accesses to vgt if enabled

[Jike Song]

Signed-off-by: Jike Song <jike.song at intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h | 41 ++++++++++++++++++++++++++++++++++-------
 1 file changed, 34 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 051442e..742fe8a 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -3077,27 +3077,54 @@ int vlv_freq_opcode(struct drm_i915_private *dev_priv, int val);
 
 #define GTT_READ32(addr)						\
 ({									\
-	u32 ret =  readl(addr);						\
-	ret;								\
+	off_t reg = (unsigned long)(addr) -				\
+			(unsigned long)(dev_priv->gtt.gsm);		\
+	u32 __ret = 0;							\
+	if (i915.enable_vgt)						\
+		vgt_emulate_host_read(reg, &__ret, sizeof(u32),		\
+						true, false);		\
+	else								\
+		__ret = readl(addr);					\
+	__ret;								\
 })
 
 #define GTT_READ64(addr)						\
 ({									\
-	u64 ret = readq(addr);						\
-	ret;								\
+	off_t reg = (unsigned long)(addr) -				\
+			(unsigned long)(dev_priv->gtt.gsm);		\
+	u64 __ret = 0;							\
+	if (i915.enable_vgt)						\
+		vgt_emulate_host_read(reg, &__ret, sizeof(u64),		\
+						true, false);		\
+	else								\
+		__ret = readq(addr);					\
+	__ret;								\
 })
 
 #define GTT_WRITE32(val, addr)						\
 ({									\
-	writel((val), (addr));						\
+	off_t reg = (unsigned long)(addr) -				\
+			(unsigned long)(dev_priv->gtt.gsm);		\
+	u32 __val = (val);						\
+	if (i915.enable_vgt)						\
+		vgt_emulate_host_write(reg, &__val, sizeof(u32),	\
+						true, false);		\
+	else								\
+		writel((val), (addr));					\
 })
 
 #define GTT_WRITE64(val, addr)						\
 ({									\
-	writeq((val), (addr));						\
+	off_t reg = (unsigned long)(addr) -				\
+			(unsigned long)(dev_priv->gtt.gsm);		\
+	u64 __val = (val);						\
+	if (i915.enable_vgt)						\
+		vgt_emulate_host_write(reg, &__val, sizeof(u64),	\
+						true, false);		\
+	else								\
+		writeq((val), (addr));					\
 })
 
-
 /* "Broadcast RGB" property */
 #define INTEL_BROADCAST_RGB_AUTO 0
 #define INTEL_BROADCAST_RGB_FULL 1
-- 
1.9.1