If any l3 rows have been previously remapped, we must remap them after
GPU reset/resume too.
v2: Just return (no warn) on remapping init if not IVB (Jesse)
Move the check of schizo userspace to i915_gem_l3_remap (Jesse)
Signed-off-by: Ben Widawsky <b...@bwidawsk.net>
---
drivers/gpu/drm/i915/i915_drv.h | 3 +++
drivers/gpu/drm/i915/i915_gem.c | 34 ++++++++++++++++++++++++++++++++++
drivers/gpu/drm/i915/i915_reg.h | 3 +++
3 files changed, 40 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 504f53e..470c732 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -656,6 +656,8 @@ typedef struct drm_i915_private {
/** PPGTT used for aliasing the PPGTT with the GTT */
struct i915_hw_ppgtt *aliasing_ppgtt;
+ u32 *l3_remap_info;
+
struct shrinker inactive_shrinker;
/**
@@ -1309,6 +1311,7 @@ int __must_check i915_gem_object_set_domain(struct
drm_i915_gem_object *obj,
int __must_check i915_gem_object_finish_gpu(struct drm_i915_gem_object *obj);
int __must_check i915_gem_init(struct drm_device *dev);
int __must_check i915_gem_init_hw(struct drm_device *dev);
+void i915_gem_l3_remap(struct drm_device *dev);
void i915_gem_init_swizzling(struct drm_device *dev);
void i915_gem_init_ppgtt(struct drm_device *dev);
void i915_gem_cleanup_ringbuffer(struct drm_device *dev);
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index d2eaa00..1c08e09 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -3527,6 +3527,38 @@ i915_gem_idle(struct drm_device *dev)
return 0;
}
+void i915_gem_l3_remap(struct drm_device *dev)
+{
+ drm_i915_private_t *dev_priv = dev->dev_private;
+ u32 misccpctl;
+ int i;
+
+ if (!IS_IVYBRIDGE(dev))
+ return;
+
+ if (!dev_priv->mm.l3_remap_info)
+ return;
+
+ misccpctl = I915_READ(GEN7_MISCCPCTL);
+ I915_WRITE(GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE);
+ POSTING_READ(GEN7_MISCCPCTL);
+
+ for (i = 0; i < GEN7_L3LOG_SIZE; i += 4) {
+ u32 remap = I915_READ(GEN7_L3LOG_BASE + i);
+ if (remap && remap != dev_priv->mm.l3_remap_info[i/4])
+ DRM_DEBUG("0x%x was already programmed to %x\n",
+ GEN7_L3LOG_BASE + i, remap);
+ if (remap && !dev_priv->mm.l3_remap_info[i/4])
+ DRM_DEBUG_DRIVER("Clearing remapped register\n");
+ I915_WRITE(GEN7_L3LOG_BASE + i,
dev_priv->mm.l3_remap_info[i/4]);
+ }
+
+ /* Make sure all the writes land before disabling dop clock gating */
+ POSTING_READ(GEN7_L3LOG_BASE);
+
+ I915_WRITE(GEN7_MISCCPCTL, misccpctl);
+}
+
void i915_gem_init_swizzling(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = dev->dev_private;
@@ -3616,6 +3648,8 @@ i915_gem_init_hw(struct drm_device *dev)
drm_i915_private_t *dev_priv = dev->dev_private;
int ret;
+ i915_gem_l3_remap(dev);
+
i915_gem_init_swizzling(dev);
ret = intel_init_render_ring_buffer(dev);
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 4d53dbd..d48a067 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4105,6 +4105,9 @@
((reg & GEN7_L3CDERRST1_SUBBANK_MASK) >> 8)
#define GEN7_L3CDERRST1_ENABLE (1<<7)
+#define GEN7_L3LOG_BASE 0xB070
+#define GEN7_L3LOG_SIZE 0x80
+
#define G4X_AUD_VID_DID 0x62020
#define INTEL_AUDIO_DEVCL 0x808629FB
#define INTEL_AUDIO_DEVBLC 0x80862801
--
1.7.10.2
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