diff options
Diffstat (limited to 'drivers/gpu/drm/i915/i915_drv.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.h | 54 |
1 files changed, 24 insertions, 30 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 4b862f366904..083644ef8f31 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1325,10 +1325,30 @@ extern void intel_display_print_error_state(struct seq_file *m, 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; \ } @@ -1341,6 +1361,9 @@ __i915_read(64, q) #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) @@ -1369,33 +1392,4 @@ __i915_write(64, q) #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 |