+static int radeon_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
+{
+ struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
+ struct radeon_device *rdev = radeon_get_rdev(bdev);
+
+ mem->bus.addr = NULL;
+ mem->bus.offset = 0;
+ mem->bus.size = mem->num_pages << PAGE_SHIFT;
+ mem->bus.base = 0;
+ mem->bus.is_iomem = false;
+ if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
+ return -EINVAL;
+ switch (mem->mem_type) {
+ case TTM_PL_SYSTEM:
+ /* system memory */
+ return 0;
+ case TTM_PL_TT:
+#if __OS_HAS_AGP
+ if (rdev->flags & RADEON_IS_AGP) {
+ /* RADEON_IS_AGP is set only if AGP is active */
+ mem->bus.offset = mem->mm_node->start << PAGE_SHIFT;
+ mem->bus.base = rdev->mc.agp_base;
+ mem->bus.is_iomem = !rdev->ddev->agp->cant_use_aperture;
+ }
+#endif
+ break;
+ case TTM_PL_VRAM:
+ mem->bus.offset = mem->mm_node->start << PAGE_SHIFT;
+ /* check if it's visible */
+ if ((mem->bus.offset + mem->bus.size) > rdev->mc.visible_vram_size)
+ return -EINVAL;
+ mem->bus.base = rdev->mc.aper_base;
+ mem->bus.is_iomem = true;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static void radeon_ttm_io_mem_free(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
+{
+}
+