diff options
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.h | 5 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem_stolen.c | 65 |
2 files changed, 70 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 1657d8733648..7f6452b592aa 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1712,6 +1712,11 @@ void i915_gem_stolen_cleanup_compression(struct drm_device *dev); void i915_gem_cleanup_stolen(struct drm_device *dev); struct drm_i915_gem_object * i915_gem_object_create_stolen(struct drm_device *dev, u32 size); +struct drm_i915_gem_object * +i915_gem_object_create_stolen_for_preallocated(struct drm_device *dev, + u32 stolen_offset, + u32 gtt_offset, + u32 size); void i915_gem_object_release_stolen(struct drm_i915_gem_object *obj); /* i915_gem_tiling.c */ diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c index efaaba5c4194..4aa6d73e6262 100644 --- a/drivers/gpu/drm/i915/i915_gem_stolen.c +++ b/drivers/gpu/drm/i915/i915_gem_stolen.c @@ -312,6 +312,71 @@ i915_gem_object_create_stolen(struct drm_device *dev, u32 size) return NULL; } +struct drm_i915_gem_object * +i915_gem_object_create_stolen_for_preallocated(struct drm_device *dev, + u32 stolen_offset, + u32 gtt_offset, + u32 size) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + struct drm_i915_gem_object *obj; + struct drm_mm_node *stolen; + + if (dev_priv->mm.stolen_base == 0) + return NULL; + + DRM_DEBUG_KMS("creating preallocated stolen object: stolen_offset=%x, gtt_offset=%x, size=%x\n", + stolen_offset, gtt_offset, size); + + /* KISS and expect everything to be page-aligned */ + BUG_ON(stolen_offset & 4095); + BUG_ON(gtt_offset & 4095); + BUG_ON(size & 4095); + + if (WARN_ON(size == 0)) + return NULL; + + stolen = drm_mm_create_block(&dev_priv->mm.stolen, + stolen_offset, size, + false); + if (stolen == NULL) { + DRM_DEBUG_KMS("failed to allocate stolen space\n"); + return NULL; + } + + obj = _i915_gem_object_create_stolen(dev, stolen); + if (obj == NULL) { + DRM_DEBUG_KMS("failed to allocate stolen object\n"); + drm_mm_put_block(stolen); + return NULL; + } + + /* To simplify the initialisation sequence between KMS and GTT, + * we allow construction of the stolen object prior to + * setting up the GTT space. The actual reservation will occur + * later. + */ + if (drm_mm_initialized(&dev_priv->mm.gtt_space)) { + obj->gtt_space = drm_mm_create_block(&dev_priv->mm.gtt_space, + gtt_offset, size, + false); + if (obj->gtt_space == NULL) { + DRM_DEBUG_KMS("failed to allocate stolen GTT space\n"); + drm_gem_object_unreference(&obj->base); + return NULL; + } + } else + obj->gtt_space = I915_GTT_RESERVED; + + obj->gtt_offset = gtt_offset; + obj->has_global_gtt_mapping = 1; + + list_add_tail(&obj->gtt_list, &dev_priv->mm.bound_list); + list_add_tail(&obj->mm_list, &dev_priv->mm.inactive_list); + + return obj; +} + void i915_gem_object_release_stolen(struct drm_i915_gem_object *obj) { |
