static void ttm_bo_release_list(struct kref *list_kref)
{
struct ttm_buffer_object *bo =
container_of(list_kref, struct ttm_buffer_object, list_kref);
struct ttm_bo_device *bdev = bo->bdev;
size_t acc_size = bo->acc_size;
BUG_ON(atomic_read(&bo->list_kref.refcount));
BUG_ON(atomic_read(&bo->kref.refcount));
BUG_ON(atomic_read(&bo->cpu_writers));
BUG_ON(bo->sync_obj != NULL);
BUG_ON(bo->mem.mm_node != NULL);
BUG_ON(!list_empty(&bo->lru));
BUG_ON(!list_empty(&bo->ddestroy));
if (bo->ttm)
ttm_tt_destroy(bo->ttm);
atomic_dec(&bo->glob->bo_count);
if (bo->destroy)
bo->destroy(bo);
else {
kfree(bo);
}
ttm_mem_global_free(bdev->glob->mem_glob, acc_size);
}
int ttm_tt_init(struct ttm_tt *ttm, struct ttm_buffer_object *bo,
uint32_t page_flags)
{
ttm_tt_init_fields(ttm, bo, page_flags);
if (ttm_tt_alloc_page_directory(ttm)) {
ttm_tt_destroy(ttm);
pr_err("Failed allocating page table\n");
return -ENOMEM;
}
return 0;
}
struct ttm_tt *ttm_tt_create(struct ttm_bo_device *bdev, unsigned long size,
uint32_t page_flags, struct page *dummy_read_page)
{
struct ttm_bo_driver *bo_driver = bdev->driver;
struct ttm_tt *ttm;
if (!bo_driver)
return NULL;
ttm = kzalloc(sizeof(*ttm), GFP_KERNEL);
if (!ttm)
return NULL;
ttm->glob = bdev->glob;
ttm->num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
ttm->first_himem_page = ttm->num_pages;
ttm->last_lomem_page = -1;
ttm->caching_state = tt_cached;
ttm->page_flags = page_flags;
ttm->dummy_read_page = dummy_read_page;
ttm_tt_alloc_page_directory(ttm);
if (!ttm->pages) {
ttm_tt_destroy(ttm);
printk(KERN_ERR TTM_PFX "Failed allocating page table\n");
return NULL;
}
ttm->be = bo_driver->create_ttm_backend_entry(bdev);
if (!ttm->be) {
ttm_tt_destroy(ttm);
printk(KERN_ERR TTM_PFX "Failed creating ttm backend entry\n");
return NULL;
}
ttm->state = tt_unpopulated;
return ttm;
}
int ttm_dma_tt_init(struct ttm_dma_tt *ttm_dma, struct ttm_buffer_object *bo,
uint32_t page_flags)
{
struct ttm_tt *ttm = &ttm_dma->ttm;
ttm_tt_init_fields(ttm, bo, page_flags);
INIT_LIST_HEAD(&ttm_dma->pages_list);
if (ttm_dma_tt_alloc_page_directory(ttm_dma)) {
ttm_tt_destroy(ttm);
pr_err("Failed allocating page table\n");
return -ENOMEM;
}
return 0;
}
/*
* Call bo->mutex locked.
*/
static int ttm_bo_add_ttm(struct ttm_buffer_object *bo, bool zero_alloc)
{
struct ttm_bo_device *bdev = bo->bdev;
struct ttm_bo_global *glob = bo->glob;
int ret = 0;
uint32_t page_flags = 0;
TTM_ASSERT_LOCKED(&bo->mutex);
bo->ttm = NULL;
if (bdev->need_dma32)
page_flags |= TTM_PAGE_FLAG_DMA32;
switch (bo->type) {
case ttm_bo_type_device:
if (zero_alloc)
page_flags |= TTM_PAGE_FLAG_ZERO_ALLOC;
case ttm_bo_type_kernel:
bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
page_flags, glob->dummy_read_page);
if (unlikely(bo->ttm == NULL))
ret = -ENOMEM;
break;
case ttm_bo_type_user:
bo->ttm = ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT,
page_flags | TTM_PAGE_FLAG_USER,
glob->dummy_read_page);
if (unlikely(bo->ttm == NULL)) {
ret = -ENOMEM;
break;
}
ret = ttm_tt_set_user(bo->ttm, current,
bo->buffer_start, bo->num_pages);
if (unlikely(ret != 0)) {
ttm_tt_destroy(bo->ttm);
bo->ttm = NULL;
}
break;
default:
printk(KERN_ERR TTM_PFX "Illegal buffer object type\n");
ret = -EINVAL;
break;
}
return ret;
}
static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object *bo)
{
if (bo->ttm) {
ttm_tt_unbind(bo->ttm);
ttm_tt_destroy(bo->ttm);
bo->ttm = NULL;
}
ttm_bo_mem_put(bo, &bo->mem);
atomic_set(&bo->reserved, 0);
/*
* Make processes trying to reserve really pick it up.
*/
smp_mb__after_atomic_dec();
wake_up_all(&bo->event_queue);
}
int ttm_tt_init(struct ttm_tt *ttm, struct ttm_bo_device *bdev,
unsigned long size, uint32_t page_flags,
struct page *dummy_read_page)
{
ttm->bdev = bdev;
ttm->glob = bdev->glob;
ttm->num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
ttm->caching_state = tt_cached;
ttm->page_flags = page_flags;
ttm->dummy_read_page = dummy_read_page;
ttm->state = tt_unpopulated;
ttm->swap_storage = NULL;
ttm_tt_alloc_page_directory(ttm);
if (!ttm->pages) {
ttm_tt_destroy(ttm);
pr_err("Failed allocating page table\n");
return -ENOMEM;
}
return 0;
}
int ttm_dma_tt_init(struct ttm_dma_tt *ttm_dma, struct ttm_bo_device *bdev,
unsigned long size, uint32_t page_flags,
vm_page_t dummy_read_page)
{
struct ttm_tt *ttm = &ttm_dma->ttm;
ttm->bdev = bdev;
ttm->glob = bdev->glob;
ttm->num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
ttm->caching_state = tt_cached;
ttm->page_flags = page_flags;
ttm->dummy_read_page = dummy_read_page;
ttm->state = tt_unpopulated;
ttm->swap_storage = NULL;
INIT_LIST_HEAD(&ttm_dma->pages_list);
ttm_dma_tt_alloc_page_directory(ttm_dma);
if (!ttm->pages || !ttm_dma->dma_address) {
ttm_tt_destroy(ttm);
pr_err("Failed allocating page table\n");
return -ENOMEM;
}
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;
}