drm/i915: Set up fence registers on sandybridge.

Signed-off-by: Eric Anholt <eric@anholt.net>

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index a35dc8c..715eaac 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2261,6 +2261,28 @@ i915_gem_object_get_pages(struct drm_gem_object *obj,
        return 0;
 }
 
+static void sandybridge_write_fence_reg(struct drm_i915_fence_reg *reg)
+{
+       struct drm_gem_object *obj = reg->obj;
+       struct drm_device *dev = obj->dev;
+       drm_i915_private_t *dev_priv = dev->dev_private;
+       struct drm_i915_gem_object *obj_priv = obj->driver_private;
+       int regnum = obj_priv->fence_reg;
+       uint64_t val;
+
+       val = (uint64_t)((obj_priv->gtt_offset + obj->size - 4096) &
+                   0xfffff000) << 32;
+       val |= obj_priv->gtt_offset & 0xfffff000;
+       val |= (uint64_t)((obj_priv->stride / 128) - 1) <<
+               SANDYBRIDGE_FENCE_PITCH_SHIFT;
+
+       if (obj_priv->tiling_mode == I915_TILING_Y)
+               val |= 1 << I965_FENCE_TILING_Y_SHIFT;
+       val |= I965_FENCE_REG_VALID;
+
+       I915_WRITE64(FENCE_REG_SANDYBRIDGE_0 + (regnum * 8), val);
+}
+
 static void i965_write_fence_reg(struct drm_i915_fence_reg *reg)
 {
        struct drm_gem_object *obj = reg->obj;
@@ -2478,7 +2500,9 @@ i915_gem_object_get_fence_reg(struct drm_gem_object *obj)
 
        reg->obj = obj;
 
-       if (IS_I965G(dev))
+       if (IS_GEN6(dev))
+               sandybridge_write_fence_reg(reg);
+       else if (IS_I965G(dev))
                i965_write_fence_reg(reg);
        else if (IS_I9XX(dev))
                i915_write_fence_reg(reg);
@@ -2504,9 +2528,12 @@ i915_gem_clear_fence_reg(struct drm_gem_object *obj)
        drm_i915_private_t *dev_priv = dev->dev_private;
        struct drm_i915_gem_object *obj_priv = obj->driver_private;
 
-       if (IS_I965G(dev))
+       if (IS_GEN6(dev)) {
+               I915_WRITE64(FENCE_REG_SANDYBRIDGE_0 +
+                            (obj_priv->fence_reg * 8), 0);
+       } else if (IS_I965G(dev)) {
                I915_WRITE64(FENCE_REG_965_0 + (obj_priv->fence_reg * 8), 0);
-       else {
+       } else {
                uint32_t fence_reg;
 
                if (obj_priv->fence_reg < 8)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index eff8d85..1232229 100644 (file)
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -235,6 +235,9 @@
 #define   I965_FENCE_REG_VALID         (1<<0)
 #define   I965_FENCE_MAX_PITCH_VAL     0x0400
 
+#define FENCE_REG_SANDYBRIDGE_0                0x100000
+#define   SANDYBRIDGE_FENCE_PITCH_SHIFT        32
+
 /*
  * Instruction and interrupt control regs
  */