LOCK_TEST_WITH_RETURN(dev, file); \
} while (0)
+/* On SNB platform, before reading ring registers forcewake bit
+ * must be set to prevent GT core from power down and stale values being
+ * returned.
+ */
+void __gen6_gt_force_wake_get(struct drm_i915_private *dev_priv);
+void __gen6_gt_force_wake_put(struct drm_i915_private *dev_priv);
+void __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv);
+
+/* We give fast paths for the really cool registers */
+#define NEEDS_FORCE_WAKE(dev_priv, reg) \
+ (((dev_priv)->info->gen >= 6) && \
+ ((reg) < 0x40000) && \
+ ((reg) != FORCEWAKE))
#define __i915_read(x, y) \
static inline u##x i915_read##x(struct drm_i915_private *dev_priv, u32 reg) { \
- u##x val = read##y(dev_priv->regs + reg); \
+ u##x val = 0; \
+ if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
+ __gen6_gt_force_wake_get(dev_priv); \
+ val = read##y(dev_priv->regs + reg); \
+ __gen6_gt_force_wake_put(dev_priv); \
+ } else { \
+ val = read##y(dev_priv->regs + reg); \
+ } \
trace_i915_reg_rw(false, reg, val, sizeof(val)); \
return val; \
}
#define __i915_write(x, y) \
static inline void i915_write##x(struct drm_i915_private *dev_priv, u32 reg, u##x val) { \
trace_i915_reg_rw(true, reg, val, sizeof(val)); \
+ if (NEEDS_FORCE_WAKE((dev_priv), (reg))) { \
+ __gen6_gt_wait_for_fifo(dev_priv); \
+ } \
write##y(val, dev_priv->regs + reg); \
}
__i915_write(8, b)
#define POSTING_READ16(reg) (void)I915_READ16_NOTRACE(reg)
-/* On SNB platform, before reading ring registers forcewake bit
- * must be set to prevent GT core from power down and stale values being
- * returned.
- */
-void __gen6_gt_force_wake_get(struct drm_i915_private *dev_priv);
-void __gen6_gt_force_wake_put(struct drm_i915_private *dev_priv);
-void __gen6_gt_wait_for_fifo(struct drm_i915_private *dev_priv);
-
-static inline u32 i915_gt_read(struct drm_i915_private *dev_priv, u32 reg)
-{
- u32 val;
-
- if (dev_priv->info->gen >= 6) {
- __gen6_gt_force_wake_get(dev_priv);
- val = I915_READ(reg);
- __gen6_gt_force_wake_put(dev_priv);
- } else
- val = I915_READ(reg);
-
- return val;
-}
-
-static inline void i915_gt_write(struct drm_i915_private *dev_priv,
- u32 reg, u32 val)
-{
- if (dev_priv->info->gen >= 6)
- __gen6_gt_wait_for_fifo(dev_priv);
- I915_WRITE(reg, val);
-}
#endif
struct drm_i915_gem_object *obj;
};
-#define I915_RING_READ(reg) i915_gt_read(dev_priv, reg)
-#define I915_RING_WRITE(reg, val) i915_gt_write(dev_priv, reg, val)
+#define I915_READ_TAIL(ring) I915_READ(RING_TAIL((ring)->mmio_base))
+#define I915_WRITE_TAIL(ring, val) I915_WRITE(RING_TAIL((ring)->mmio_base), val)
-#define I915_READ_TAIL(ring) I915_RING_READ(RING_TAIL((ring)->mmio_base))
-#define I915_WRITE_TAIL(ring, val) I915_RING_WRITE(RING_TAIL((ring)->mmio_base), val)
+#define I915_READ_START(ring) I915_READ(RING_START((ring)->mmio_base))
+#define I915_WRITE_START(ring, val) I915_WRITE(RING_START((ring)->mmio_base), val)
-#define I915_READ_START(ring) I915_RING_READ(RING_START((ring)->mmio_base))
-#define I915_WRITE_START(ring, val) I915_RING_WRITE(RING_START((ring)->mmio_base), val)
+#define I915_READ_HEAD(ring) I915_READ(RING_HEAD((ring)->mmio_base))
+#define I915_WRITE_HEAD(ring, val) I915_WRITE(RING_HEAD((ring)->mmio_base), val)
-#define I915_READ_HEAD(ring) I915_RING_READ(RING_HEAD((ring)->mmio_base))
-#define I915_WRITE_HEAD(ring, val) I915_RING_WRITE(RING_HEAD((ring)->mmio_base), val)
+#define I915_READ_CTL(ring) I915_READ(RING_CTL((ring)->mmio_base))
+#define I915_WRITE_CTL(ring, val) I915_WRITE(RING_CTL((ring)->mmio_base), val)
-#define I915_READ_CTL(ring) I915_RING_READ(RING_CTL((ring)->mmio_base))
-#define I915_WRITE_CTL(ring, val) I915_RING_WRITE(RING_CTL((ring)->mmio_base), val)
+#define I915_READ_IMR(ring) I915_READ(RING_IMR((ring)->mmio_base))
+#define I915_WRITE_IMR(ring, val) I915_WRITE(RING_IMR((ring)->mmio_base), val)
-#define I915_READ_IMR(ring) I915_RING_READ(RING_IMR((ring)->mmio_base))
-#define I915_WRITE_IMR(ring, val) I915_RING_WRITE(RING_IMR((ring)->mmio_base), val)
-
-#define I915_READ_NOPID(ring) I915_RING_READ(RING_NOPID((ring)->mmio_base))
-#define I915_READ_SYNC_0(ring) I915_RING_READ(RING_SYNC_0((ring)->mmio_base))
-#define I915_READ_SYNC_1(ring) I915_RING_READ(RING_SYNC_1((ring)->mmio_base))
+#define I915_READ_NOPID(ring) I915_READ(RING_NOPID((ring)->mmio_base))
+#define I915_READ_SYNC_0(ring) I915_READ(RING_SYNC_0((ring)->mmio_base))
+#define I915_READ_SYNC_1(ring) I915_READ(RING_SYNC_1((ring)->mmio_base))
struct intel_ring_buffer {
const char *name;