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 i915_address_space *ggtt = &dev_priv->gtt.base; struct drm_i915_gem_object *obj; struct drm_mm_node *stolen; struct i915_vma *vma; int ret; if (!drm_mm_initialized(&dev_priv->mm.stolen)) 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(size & 4095); if (WARN_ON(size == 0)) return NULL; stolen = kzalloc(sizeof(*stolen), GFP_KERNEL); if (!stolen) return NULL; stolen->start = stolen_offset; stolen->size = size; ret = drm_mm_reserve_node(&dev_priv->mm.stolen, stolen); if (ret) { DRM_DEBUG_KMS("failed to allocate stolen space\n"); kfree(stolen); return NULL; } obj = _i915_gem_object_create_stolen(dev, stolen); if (obj == NULL) { DRM_DEBUG_KMS("failed to allocate stolen object\n"); drm_mm_remove_node(stolen); kfree(stolen); return NULL; } /* Some objects just need physical mem from stolen space */ if (gtt_offset == I915_GTT_OFFSET_NONE) return obj; vma = i915_gem_vma_create(obj, ggtt); if (IS_ERR(vma)) { ret = PTR_ERR(vma); goto err_out; } /* 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. */ vma->node.start = gtt_offset; vma->node.size = size; if (drm_mm_initialized(&ggtt->mm)) { ret = drm_mm_reserve_node(&ggtt->mm, &vma->node); if (ret) { DRM_DEBUG_KMS("failed to allocate stolen GTT space\n"); goto err_vma; } } obj->has_global_gtt_mapping = 1; list_add_tail(&obj->global_list, &dev_priv->mm.bound_list); list_add_tail(&vma->mm_list, &ggtt->inactive_list); return obj; err_vma: i915_gem_vma_destroy(vma); err_out: drm_mm_remove_node(stolen); kfree(stolen); drm_gem_object_unreference(&obj->base); return NULL; }
struct drm_i915_gem_object * kos_gem_fb_object_create(struct drm_device *dev, u32 gtt_offset, u32 size) { struct drm_i915_private *dev_priv = dev->dev_private; struct i915_address_space *ggtt = &dev_priv->gtt.base; struct drm_i915_gem_object *obj; struct drm_mm_node *fb_node; struct i915_vma *vma; int ret; DRM_DEBUG_KMS("creating preallocated framebuffer object: gtt_offset=%x, size=%x\n", gtt_offset, size); /* KISS and expect everything to be page-aligned */ BUG_ON(size & 4095); if (WARN_ON(size == 0)) return NULL; fb_node = kzalloc(sizeof(*fb_node), GFP_KERNEL); if (!fb_node) return NULL; fb_node->start = gtt_offset; fb_node->size = size; obj = _kos_fb_object_create(dev, fb_node); if (obj == NULL) { DRM_DEBUG_KMS("failed to preallocate framebuffer object\n"); kfree(fb_node); return NULL; } vma = i915_gem_obj_lookup_or_create_vma(obj, ggtt); if (IS_ERR(vma)) { ret = PTR_ERR(vma); goto err_out; } /* 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. */ vma->node.start = gtt_offset; vma->node.size = size; if (drm_mm_initialized(&ggtt->mm)) { ret = drm_mm_reserve_node(&ggtt->mm, &vma->node); if (ret) { DRM_DEBUG_KMS("failed to allocate framebuffer GTT space\n"); goto err_vma; } } // obj->has_global_gtt_mapping = 1; list_add_tail(&obj->global_list, &dev_priv->mm.bound_list); list_add_tail(&vma->mm_list, &ggtt->inactive_list); mutex_lock(&dev->object_name_lock); idr_preload(GFP_KERNEL); if (!obj->base.name) { ret = idr_alloc(&dev->object_name_idr, &obj->base, 1, 0, GFP_NOWAIT); if (ret < 0) goto err_gem; obj->base.name = ret; /* Allocate a reference for the name table. */ drm_gem_object_reference(&obj->base); DRM_DEBUG_KMS("%s allocate fb name %d\n", __FUNCTION__, obj->base.name ); } idr_preload_end(); mutex_unlock(&dev->object_name_lock); drm_gem_object_unreference(&obj->base); return obj; err_gem: idr_preload_end(); mutex_unlock(&dev->object_name_lock); err_vma: i915_gem_vma_destroy(vma); err_out: kfree(fb_node); drm_gem_object_unreference(&obj->base); return NULL; }