void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo)
{
struct ttm_bo_device *bdev = bo->bdev;
struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type];
ttm_mem_io_lock(man, false);
ttm_bo_unmap_virtual_locked(bo);
ttm_mem_io_unlock(man);
}
static int ttm_mem_io_evict(struct ttm_mem_type_manager *man)
{
struct ttm_buffer_object *bo;
if (!man->use_io_reserve_lru || list_empty(&man->io_reserve_lru))
return -EAGAIN;
bo = list_first_entry(&man->io_reserve_lru,
struct ttm_buffer_object,
io_reserve_lru);
list_del_init(&bo->io_reserve_lru);
ttm_bo_unmap_virtual_locked(bo);
return 0;
}
static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
struct ttm_mem_reg *mem,
bool evict, bool interruptible,
bool no_wait_reserve, bool no_wait_gpu)
{
struct ttm_bo_device *bdev = bo->bdev;
bool old_is_pci = ttm_mem_reg_is_pci(bdev, &bo->mem);
bool new_is_pci = ttm_mem_reg_is_pci(bdev, mem);
struct ttm_mem_type_manager *old_man = &bdev->man[bo->mem.mem_type];
struct ttm_mem_type_manager *new_man = &bdev->man[mem->mem_type];
int ret = 0;
if (old_is_pci || new_is_pci ||
((mem->placement & bo->mem.placement & TTM_PL_MASK_CACHING) == 0)) {
ret = ttm_mem_io_lock(old_man, true);
if (unlikely(ret != 0))
goto out_err;
ttm_bo_unmap_virtual_locked(bo);
ttm_mem_io_unlock(old_man);
}
/*
* Create and bind a ttm if required.
*/
if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && (bo->ttm == NULL)) {
ret = ttm_bo_add_ttm(bo, false);
if (ret)
goto out_err;
ret = ttm_tt_set_placement_caching(bo->ttm, mem->placement);
if (ret)
goto out_err;
if (mem->mem_type != TTM_PL_SYSTEM) {
ret = ttm_tt_bind(bo->ttm, mem);
if (ret)
goto out_err;
}
if (bo->mem.mem_type == TTM_PL_SYSTEM) {
if (bdev->driver->move_notify)
bdev->driver->move_notify(bo, mem);
bo->mem = *mem;
mem->mm_node = NULL;
goto moved;
}
}
if (bdev->driver->move_notify)
bdev->driver->move_notify(bo, mem);
if (!(old_man->flags & TTM_MEMTYPE_FLAG_FIXED) &&
!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED))
ret = ttm_bo_move_ttm(bo, evict, no_wait_reserve, no_wait_gpu, mem);
else if (bdev->driver->move)
ret = bdev->driver->move(bo, evict, interruptible,
no_wait_reserve, no_wait_gpu, mem);
else
ret = ttm_bo_move_memcpy(bo, evict, no_wait_reserve, no_wait_gpu, mem);
if (ret)
goto out_err;
moved:
if (bo->evicted) {
ret = bdev->driver->invalidate_caches(bdev, bo->mem.placement);
if (ret)
printk(KERN_ERR TTM_PFX "Can not flush read caches\n");
bo->evicted = false;
}
if (bo->mem.mm_node) {
bo->offset = (bo->mem.start << PAGE_SHIFT) +
bdev->man[bo->mem.mem_type].gpu_offset;
bo->cur_placement = bo->mem.placement;
} else
bo->offset = 0;
return 0;
out_err:
new_man = &bdev->man[bo->mem.mem_type];
if ((new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && bo->ttm) {
ttm_tt_unbind(bo->ttm);
ttm_tt_destroy(bo->ttm);
bo->ttm = NULL;
}
return ret;
}
