| 27,1228 → 27,54 |
|---|
| /* |
| * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com> |
| */ |
| |
| #define pr_fmt(fmt) "[TTM] " fmt |
| |
| #include <drm/ttm/ttm_module.h> |
| #include <drm/ttm/ttm_bo_driver.h> |
| #include <drm/ttm/ttm_placement.h> |
| #include <linux/jiffies.h> |
| #include <linux/slab.h> |
| #include <linux/sched.h> |
| #include <linux/mm.h> |
| #include <linux/module.h> |
| |
| #define pr_err(fmt, ...) \ |
| printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__) |
| |
| int ttm_mem_io_lock(struct ttm_mem_type_manager *man, bool interruptible) |
| { |
| |
| mutex_lock(&man->io_reserve_mutex); |
| return 0; |
| } |
| |
| void ttm_mem_io_unlock(struct ttm_mem_type_manager *man) |
| { |
| if (likely(man->io_reserve_fastpath)) |
| return; |
| |
| mutex_unlock(&man->io_reserve_mutex); |
| } |
| |
| |
| #if 0 |
| static void ttm_mem_type_debug(struct ttm_bo_device *bdev, int mem_type) |
| { |
| struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
| |
| pr_err(" has_type: %d\n", man->has_type); |
| pr_err(" use_type: %d\n", man->use_type); |
| pr_err(" flags: 0x%08X\n", man->flags); |
| pr_err(" gpu_offset: 0x%08lX\n", man->gpu_offset); |
| pr_err(" size: %llu\n", man->size); |
| pr_err(" available_caching: 0x%08X\n", man->available_caching); |
| pr_err(" default_caching: 0x%08X\n", man->default_caching); |
| if (mem_type != TTM_PL_SYSTEM) |
| (*man->func->debug)(man, TTM_PFX); |
| } |
| |
| static void ttm_bo_mem_space_debug(struct ttm_buffer_object *bo, |
| struct ttm_placement *placement) |
| { |
| int i, ret, mem_type; |
| |
| pr_err("No space for %p (%lu pages, %luK, %luM)\n", |
| bo, bo->mem.num_pages, bo->mem.size >> 10, |
| bo->mem.size >> 20); |
| for (i = 0; i < placement->num_placement; i++) { |
| ret = ttm_mem_type_from_flags(placement->placement[i], |
| &mem_type); |
| if (ret) |
| return; |
| pr_err(" placement[%d]=0x%08X (%d)\n", |
| i, placement->placement[i], mem_type); |
| ttm_mem_type_debug(bo->bdev, mem_type); |
| } |
| } |
| |
| static ssize_t ttm_bo_global_show(struct kobject *kobj, |
| struct attribute *attr, |
| char *buffer) |
| { |
| struct ttm_bo_global *glob = |
| container_of(kobj, struct ttm_bo_global, kobj); |
| |
| return snprintf(buffer, PAGE_SIZE, "%lu\n", |
| (unsigned long) atomic_read(&glob->bo_count)); |
| } |
| |
| static struct attribute *ttm_bo_global_attrs[] = { |
| &ttm_bo_count, |
| NULL |
| }; |
| |
| static const struct sysfs_ops ttm_bo_global_ops = { |
| .show = &ttm_bo_global_show |
| }; |
| |
| static struct kobj_type ttm_bo_glob_kobj_type = { |
| .release = &ttm_bo_global_kobj_release, |
| .sysfs_ops = &ttm_bo_global_ops, |
| .default_attrs = ttm_bo_global_attrs |
| }; |
| #endif |
| |
| |
| static inline uint32_t ttm_bo_type_flags(unsigned type) |
| { |
| return 1 << (type); |
| } |
| |
| 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); |
| } |
| |
| void ttm_bo_add_to_lru(struct ttm_buffer_object *bo) |
| { |
| struct ttm_bo_device *bdev = bo->bdev; |
| struct ttm_mem_type_manager *man; |
| |
| // BUG_ON(!ttm_bo_is_reserved(bo)); |
| |
| if (!(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) { |
| |
| BUG_ON(!list_empty(&bo->lru)); |
| |
| man = &bdev->man[bo->mem.mem_type]; |
| list_add_tail(&bo->lru, &man->lru); |
| kref_get(&bo->list_kref); |
| |
| if (bo->ttm != NULL) { |
| list_add_tail(&bo->swap, &bo->glob->swap_lru); |
| kref_get(&bo->list_kref); |
| } |
| } |
| } |
| EXPORT_SYMBOL(ttm_bo_add_to_lru); |
| |
| int ttm_bo_del_from_lru(struct ttm_buffer_object *bo) |
| { |
| int put_count = 0; |
| |
| if (!list_empty(&bo->swap)) { |
| list_del_init(&bo->swap); |
| ++put_count; |
| } |
| if (!list_empty(&bo->lru)) { |
| list_del_init(&bo->lru); |
| ++put_count; |
| } |
| |
| /* |
| * TODO: Add a driver hook to delete from |
| * driver-specific LRU's here. |
| */ |
| |
| return put_count; |
| } |
| |
| static void ttm_bo_ref_bug(struct kref *list_kref) |
| { |
| BUG(); |
| } |
| |
| void ttm_bo_list_ref_sub(struct ttm_buffer_object *bo, int count, |
| bool never_free) |
| { |
| // kref_sub(&bo->list_kref, count, |
| // (never_free) ? ttm_bo_ref_bug : ttm_bo_release_list); |
| } |
| |
| void ttm_bo_del_sub_from_lru(struct ttm_buffer_object *bo) |
| { |
| int put_count; |
| |
| spin_lock(&bo->glob->lru_lock); |
| put_count = ttm_bo_del_from_lru(bo); |
| spin_unlock(&bo->glob->lru_lock); |
| ttm_bo_list_ref_sub(bo, put_count, true); |
| } |
| EXPORT_SYMBOL(ttm_bo_del_sub_from_lru); |
| |
| |
| /* |
| * 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 = bdev->driver->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_sg: |
| bo->ttm = bdev->driver->ttm_tt_create(bdev, bo->num_pages << PAGE_SHIFT, |
| page_flags | TTM_PAGE_FLAG_SG, |
| glob->dummy_read_page); |
| if (unlikely(bo->ttm == NULL)) { |
| ret = -ENOMEM; |
| break; |
| } |
| bo->ttm->sg = bo->sg; |
| break; |
| default: |
| pr_err("Illegal buffer object type\n"); |
| ret = -EINVAL; |
| break; |
| } |
| |
| return ret; |
| } |
| |
| #if 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_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)) { |
| if (bo->ttm == NULL) { |
| bool zero = !(old_man->flags & TTM_MEMTYPE_FLAG_FIXED); |
| ret = ttm_bo_add_ttm(bo, zero); |
| 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_gpu, mem); |
| else if (bdev->driver->move) |
| ret = bdev->driver->move(bo, evict, interruptible, |
| no_wait_gpu, mem); |
| else |
| ret = ttm_bo_move_memcpy(bo, evict, no_wait_gpu, mem); |
| |
| if (ret) { |
| if (bdev->driver->move_notify) { |
| struct ttm_mem_reg tmp_mem = *mem; |
| *mem = bo->mem; |
| bo->mem = tmp_mem; |
| bdev->driver->move_notify(bo, mem); |
| bo->mem = *mem; |
| *mem = tmp_mem; |
| } |
| |
| goto out_err; |
| } |
| |
| moved: |
| if (bo->evicted) { |
| ret = bdev->driver->invalidate_caches(bdev, bo->mem.placement); |
| if (ret) |
| pr_err("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; |
| } |
| |
| /** |
| * Call bo::reserved. |
| * Will release GPU memory type usage on destruction. |
| * This is the place to put in driver specific hooks to release |
| * driver private resources. |
| * Will release the bo::reserved lock. |
| */ |
| |
| static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object *bo) |
| { |
| if (bo->bdev->driver->move_notify) |
| bo->bdev->driver->move_notify(bo, NULL); |
| |
| if (bo->ttm) { |
| ttm_tt_unbind(bo->ttm); |
| ttm_tt_destroy(bo->ttm); |
| bo->ttm = NULL; |
| } |
| ttm_bo_mem_put(bo, &bo->mem); |
| |
| ww_mutex_unlock (&bo->resv->lock); |
| } |
| |
| static void ttm_bo_cleanup_refs_or_queue(struct ttm_buffer_object *bo) |
| { |
| struct ttm_bo_device *bdev = bo->bdev; |
| struct ttm_bo_global *glob = bo->glob; |
| struct ttm_bo_driver *driver = bdev->driver; |
| void *sync_obj = NULL; |
| int put_count; |
| int ret; |
| |
| spin_lock(&glob->lru_lock); |
| ret = ttm_bo_reserve_nolru(bo, false, true, false, 0); |
| |
| spin_lock(&bdev->fence_lock); |
| (void) ttm_bo_wait(bo, false, false, true); |
| if (!ret && !bo->sync_obj) { |
| spin_unlock(&bdev->fence_lock); |
| put_count = ttm_bo_del_from_lru(bo); |
| |
| spin_unlock(&glob->lru_lock); |
| ttm_bo_cleanup_memtype_use(bo); |
| |
| ttm_bo_list_ref_sub(bo, put_count, true); |
| |
| return; |
| } |
| if (bo->sync_obj) |
| sync_obj = driver->sync_obj_ref(bo->sync_obj); |
| spin_unlock(&bdev->fence_lock); |
| |
| if (!ret) |
| ww_mutex_unlock(&bo->resv->lock); |
| |
| kref_get(&bo->list_kref); |
| list_add_tail(&bo->ddestroy, &bdev->ddestroy); |
| spin_unlock(&glob->lru_lock); |
| |
| if (sync_obj) { |
| driver->sync_obj_flush(sync_obj); |
| driver->sync_obj_unref(&sync_obj); |
| } |
| schedule_delayed_work(&bdev->wq, |
| ((HZ / 100) < 1) ? 1 : HZ / 100); |
| } |
| |
| /** |
| * function ttm_bo_cleanup_refs_and_unlock |
| * If bo idle, remove from delayed- and lru lists, and unref. |
| * If not idle, do nothing. |
| /* Notes: |
| * |
| * Must be called with lru_lock and reservation held, this function |
| * will drop both before returning. |
| * |
| * @interruptible Any sleeps should occur interruptibly. |
| * @no_wait_gpu Never wait for gpu. Return -EBUSY instead. |
| * We store bo pointer in drm_mm_node struct so we know which bo own a |
| * specific node. There is no protection on the pointer, thus to make |
| * sure things don't go berserk you have to access this pointer while |
| * holding the global lru lock and make sure anytime you free a node you |
| * reset the pointer to NULL. |
| */ |
| |
| static int ttm_bo_cleanup_refs_and_unlock(struct ttm_buffer_object *bo, |
| bool interruptible, |
| bool no_wait_gpu) |
| { |
| struct ttm_bo_device *bdev = bo->bdev; |
| struct ttm_bo_driver *driver = bdev->driver; |
| struct ttm_bo_global *glob = bo->glob; |
| int put_count; |
| int ret; |
| #include "ttm/ttm_module.h" |
| #include "ttm/ttm_bo_driver.h" |
| #include "ttm/ttm_placement.h" |
| #include <linux/module.h> |
| |
| spin_lock(&bdev->fence_lock); |
| ret = ttm_bo_wait(bo, false, false, true); |
| |
| if (ret && !no_wait_gpu) { |
| void *sync_obj; |
| |
| /* |
| * Take a reference to the fence and unreserve, |
| * at this point the buffer should be dead, so |
| * no new sync objects can be attached. |
| */ |
| sync_obj = driver->sync_obj_ref(bo->sync_obj); |
| spin_unlock(&bdev->fence_lock); |
| |
| ww_mutex_unlock(&bo->resv->lock); |
| spin_unlock(&glob->lru_lock); |
| |
| ret = driver->sync_obj_wait(sync_obj, false, interruptible); |
| driver->sync_obj_unref(&sync_obj); |
| if (ret) |
| return ret; |
| |
| /* |
| * remove sync_obj with ttm_bo_wait, the wait should be |
| * finished, and no new wait object should have been added. |
| */ |
| spin_lock(&bdev->fence_lock); |
| ret = ttm_bo_wait(bo, false, false, true); |
| WARN_ON(ret); |
| spin_unlock(&bdev->fence_lock); |
| if (ret) |
| return ret; |
| |
| spin_lock(&glob->lru_lock); |
| ret = ttm_bo_reserve_nolru(bo, false, true, false, 0); |
| |
| /* |
| * We raced, and lost, someone else holds the reservation now, |
| * and is probably busy in ttm_bo_cleanup_memtype_use. |
| * |
| * Even if it's not the case, because we finished waiting any |
| * delayed destruction would succeed, so just return success |
| * here. |
| */ |
| if (ret) { |
| spin_unlock(&glob->lru_lock); |
| return 0; |
| } |
| } else |
| spin_unlock(&bdev->fence_lock); |
| |
| if (ret || unlikely(list_empty(&bo->ddestroy))) { |
| ww_mutex_unlock(&bo->resv->lock); |
| spin_unlock(&glob->lru_lock); |
| return ret; |
| } |
| |
| put_count = ttm_bo_del_from_lru(bo); |
| list_del_init(&bo->ddestroy); |
| ++put_count; |
| |
| spin_unlock(&glob->lru_lock); |
| ttm_bo_cleanup_memtype_use(bo); |
| |
| ttm_bo_list_ref_sub(bo, put_count, true); |
| |
| return 0; |
| } |
| |
| /** |
| * Traverse the delayed list, and call ttm_bo_cleanup_refs on all |
| * encountered buffers. |
| */ |
| |
| static int ttm_bo_delayed_delete(struct ttm_bo_device *bdev, bool remove_all) |
| int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type, |
| unsigned long p_size) |
| { |
| struct ttm_bo_global *glob = bdev->glob; |
| struct ttm_buffer_object *entry = NULL; |
| int ret = 0; |
| |
| spin_lock(&glob->lru_lock); |
| if (list_empty(&bdev->ddestroy)) |
| goto out_unlock; |
| |
| entry = list_first_entry(&bdev->ddestroy, |
| struct ttm_buffer_object, ddestroy); |
| kref_get(&entry->list_kref); |
| |
| for (;;) { |
| struct ttm_buffer_object *nentry = NULL; |
| |
| if (entry->ddestroy.next != &bdev->ddestroy) { |
| nentry = list_first_entry(&entry->ddestroy, |
| struct ttm_buffer_object, ddestroy); |
| kref_get(&nentry->list_kref); |
| } |
| |
| ret = ttm_bo_reserve_nolru(entry, false, true, false, 0); |
| if (remove_all && ret) { |
| spin_unlock(&glob->lru_lock); |
| ret = ttm_bo_reserve_nolru(entry, false, false, |
| false, 0); |
| spin_lock(&glob->lru_lock); |
| } |
| |
| if (!ret) |
| ret = ttm_bo_cleanup_refs_and_unlock(entry, false, |
| !remove_all); |
| else |
| spin_unlock(&glob->lru_lock); |
| |
| kref_put(&entry->list_kref, ttm_bo_release_list); |
| entry = nentry; |
| |
| if (ret || !entry) |
| goto out; |
| |
| spin_lock(&glob->lru_lock); |
| if (list_empty(&entry->ddestroy)) |
| break; |
| } |
| |
| out_unlock: |
| spin_unlock(&glob->lru_lock); |
| out: |
| if (entry) |
| kref_put(&entry->list_kref, ttm_bo_release_list); |
| return ret; |
| } |
| |
| static void ttm_bo_delayed_workqueue(struct work_struct *work) |
| { |
| struct ttm_bo_device *bdev = |
| container_of(work, struct ttm_bo_device, wq.work); |
| |
| if (ttm_bo_delayed_delete(bdev, false)) { |
| schedule_delayed_work(&bdev->wq, |
| ((HZ / 100) < 1) ? 1 : HZ / 100); |
| } |
| } |
| #endif |
| |
| static void ttm_bo_release(struct kref *kref) |
| { |
| struct ttm_buffer_object *bo = |
| container_of(kref, struct ttm_buffer_object, kref); |
| struct ttm_bo_device *bdev = bo->bdev; |
| struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type]; |
| |
| write_lock(&bdev->vm_lock); |
| if (likely(bo->vm_node != NULL)) { |
| // rb_erase(&bo->vm_rb, &bdev->addr_space_rb); |
| drm_mm_put_block(bo->vm_node); |
| bo->vm_node = NULL; |
| } |
| write_unlock(&bdev->vm_lock); |
| ttm_mem_io_lock(man, false); |
| // ttm_mem_io_free_vm(bo); |
| ttm_mem_io_unlock(man); |
| // ttm_bo_cleanup_refs_or_queue(bo); |
| // kref_put(&bo->list_kref, ttm_bo_release_list); |
| } |
| |
| void ttm_bo_unref(struct ttm_buffer_object **p_bo) |
| { |
| struct ttm_buffer_object *bo = *p_bo; |
| |
| *p_bo = NULL; |
| kref_put(&bo->kref, ttm_bo_release); |
| } |
| EXPORT_SYMBOL(ttm_bo_unref); |
| |
| #if 0 |
| int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device *bdev) |
| { |
| return cancel_delayed_work_sync(&bdev->wq); |
| } |
| EXPORT_SYMBOL(ttm_bo_lock_delayed_workqueue); |
| |
| void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev, int resched) |
| { |
| if (resched) |
| schedule_delayed_work(&bdev->wq, |
| ((HZ / 100) < 1) ? 1 : HZ / 100); |
| } |
| EXPORT_SYMBOL(ttm_bo_unlock_delayed_workqueue); |
| |
| static int ttm_bo_evict(struct ttm_buffer_object *bo, bool interruptible, |
| bool no_wait_gpu) |
| { |
| struct ttm_bo_device *bdev = bo->bdev; |
| struct ttm_mem_reg evict_mem; |
| struct ttm_placement placement; |
| int ret = 0; |
| |
| spin_lock(&bdev->fence_lock); |
| ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); |
| spin_unlock(&bdev->fence_lock); |
| |
| if (unlikely(ret != 0)) { |
| if (ret != -ERESTARTSYS) { |
| pr_err("Failed to expire sync object before buffer eviction\n"); |
| } |
| goto out; |
| } |
| |
| // BUG_ON(!ttm_bo_is_reserved(bo)); |
| |
| evict_mem = bo->mem; |
| evict_mem.mm_node = NULL; |
| evict_mem.bus.io_reserved_vm = false; |
| evict_mem.bus.io_reserved_count = 0; |
| |
| placement.fpfn = 0; |
| placement.lpfn = 0; |
| placement.num_placement = 0; |
| placement.num_busy_placement = 0; |
| bdev->driver->evict_flags(bo, &placement); |
| ret = ttm_bo_mem_space(bo, &placement, &evict_mem, interruptible, |
| no_wait_gpu); |
| if (ret) { |
| if (ret != -ERESTARTSYS) { |
| pr_err("Failed to find memory space for buffer 0x%p eviction\n", |
| bo); |
| ttm_bo_mem_space_debug(bo, &placement); |
| } |
| goto out; |
| } |
| |
| ret = ttm_bo_handle_move_mem(bo, &evict_mem, true, interruptible, |
| no_wait_gpu); |
| if (ret) { |
| if (ret != -ERESTARTSYS) |
| pr_err("Buffer eviction failed\n"); |
| ttm_bo_mem_put(bo, &evict_mem); |
| goto out; |
| } |
| bo->evicted = true; |
| out: |
| return ret; |
| } |
| |
| static int ttm_mem_evict_first(struct ttm_bo_device *bdev, |
| uint32_t mem_type, |
| bool interruptible, |
| bool no_wait_gpu) |
| { |
| struct ttm_bo_global *glob = bdev->glob; |
| struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
| struct ttm_buffer_object *bo; |
| int ret = -EBUSY, put_count; |
| |
| spin_lock(&glob->lru_lock); |
| list_for_each_entry(bo, &man->lru, lru) { |
| ret = ttm_bo_reserve_nolru(bo, false, true, false, 0); |
| if (!ret) |
| break; |
| } |
| |
| if (ret) { |
| spin_unlock(&glob->lru_lock); |
| return ret; |
| } |
| |
| kref_get(&bo->list_kref); |
| |
| if (!list_empty(&bo->ddestroy)) { |
| ret = ttm_bo_cleanup_refs_and_unlock(bo, interruptible, |
| no_wait_gpu); |
| kref_put(&bo->list_kref, ttm_bo_release_list); |
| return ret; |
| } |
| |
| put_count = ttm_bo_del_from_lru(bo); |
| spin_unlock(&glob->lru_lock); |
| |
| BUG_ON(ret != 0); |
| |
| ttm_bo_list_ref_sub(bo, put_count, true); |
| |
| ret = ttm_bo_evict(bo, interruptible, no_wait_gpu); |
| ttm_bo_unreserve(bo); |
| |
| kref_put(&bo->list_kref, ttm_bo_release_list); |
| return ret; |
| } |
| |
| void ttm_bo_mem_put(struct ttm_buffer_object *bo, struct ttm_mem_reg *mem) |
| { |
| struct ttm_mem_type_manager *man = &bo->bdev->man[mem->mem_type]; |
| |
| if (mem->mm_node) |
| (*man->func->put_node)(man, mem); |
| } |
| EXPORT_SYMBOL(ttm_bo_mem_put); |
| |
| /** |
| * Repeatedly evict memory from the LRU for @mem_type until we create enough |
| * space, or we've evicted everything and there isn't enough space. |
| */ |
| static int ttm_bo_mem_force_space(struct ttm_buffer_object *bo, |
| uint32_t mem_type, |
| struct ttm_placement *placement, |
| struct ttm_mem_reg *mem, |
| bool interruptible, |
| bool no_wait_gpu) |
| { |
| struct ttm_bo_device *bdev = bo->bdev; |
| struct ttm_mem_type_manager *man = &bdev->man[mem_type]; |
| int ret; |
| |
| do { |
| ret = (*man->func->get_node)(man, bo, placement, mem); |
| if (unlikely(ret != 0)) |
| return ret; |
| if (mem->mm_node) |
| break; |
| ret = ttm_mem_evict_first(bdev, mem_type, |
| interruptible, no_wait_gpu); |
| if (unlikely(ret != 0)) |
| return ret; |
| } while (1); |
| if (mem->mm_node == NULL) |
| return -ENOMEM; |
| mem->mem_type = mem_type; |
| return 0; |
| } |
| |
| static uint32_t ttm_bo_select_caching(struct ttm_mem_type_manager *man, |
| uint32_t cur_placement, |
| uint32_t proposed_placement) |
| { |
| uint32_t caching = proposed_placement & TTM_PL_MASK_CACHING; |
| uint32_t result = proposed_placement & ~TTM_PL_MASK_CACHING; |
| |
| /** |
| * Keep current caching if possible. |
| */ |
| |
| if ((cur_placement & caching) != 0) |
| result |= (cur_placement & caching); |
| else if ((man->default_caching & caching) != 0) |
| result |= man->default_caching; |
| else if ((TTM_PL_FLAG_CACHED & caching) != 0) |
| result |= TTM_PL_FLAG_CACHED; |
| else if ((TTM_PL_FLAG_WC & caching) != 0) |
| result |= TTM_PL_FLAG_WC; |
| else if ((TTM_PL_FLAG_UNCACHED & caching) != 0) |
| result |= TTM_PL_FLAG_UNCACHED; |
| |
| return result; |
| } |
| |
| static bool ttm_bo_mt_compatible(struct ttm_mem_type_manager *man, |
| uint32_t mem_type, |
| uint32_t proposed_placement, |
| uint32_t *masked_placement) |
| { |
| uint32_t cur_flags = ttm_bo_type_flags(mem_type); |
| |
| if ((cur_flags & proposed_placement & TTM_PL_MASK_MEM) == 0) |
| return false; |
| |
| if ((proposed_placement & man->available_caching) == 0) |
| return false; |
| |
| cur_flags |= (proposed_placement & man->available_caching); |
| |
| *masked_placement = cur_flags; |
| return true; |
| } |
| |
| /** |
| * Creates space for memory region @mem according to its type. |
| * |
| * This function first searches for free space in compatible memory types in |
| * the priority order defined by the driver. If free space isn't found, then |
| * ttm_bo_mem_force_space is attempted in priority order to evict and find |
| * space. |
| */ |
| int ttm_bo_mem_space(struct ttm_buffer_object *bo, |
| struct ttm_placement *placement, |
| struct ttm_mem_reg *mem, |
| bool interruptible, |
| bool no_wait_gpu) |
| { |
| struct ttm_bo_device *bdev = bo->bdev; |
| int ret = -EINVAL; |
| struct ttm_mem_type_manager *man; |
| uint32_t mem_type = TTM_PL_SYSTEM; |
| uint32_t cur_flags = 0; |
| bool type_found = false; |
| bool type_ok = false; |
| bool has_erestartsys = false; |
| int i, ret; |
| |
| mem->mm_node = NULL; |
| for (i = 0; i < placement->num_placement; ++i) { |
| ret = ttm_mem_type_from_flags(placement->placement[i], |
| &mem_type); |
| if (ret) |
| if (type >= TTM_NUM_MEM_TYPES) { |
| printk(KERN_ERR TTM_PFX "Illegal memory type %d\n", type); |
| return ret; |
| man = &bdev->man[mem_type]; |
| |
| type_ok = ttm_bo_mt_compatible(man, |
| mem_type, |
| placement->placement[i], |
| &cur_flags); |
| |
| if (!type_ok) |
| continue; |
| |
| cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
| cur_flags); |
| /* |
| * Use the access and other non-mapping-related flag bits from |
| * the memory placement flags to the current flags |
| */ |
| ttm_flag_masked(&cur_flags, placement->placement[i], |
| ~TTM_PL_MASK_MEMTYPE); |
| |
| if (mem_type == TTM_PL_SYSTEM) |
| break; |
| |
| if (man->has_type && man->use_type) { |
| type_found = true; |
| ret = (*man->func->get_node)(man, bo, placement, mem); |
| if (unlikely(ret)) |
| return ret; |
| } |
| if (mem->mm_node) |
| break; |
| } |
| |
| if ((type_ok && (mem_type == TTM_PL_SYSTEM)) || mem->mm_node) { |
| mem->mem_type = mem_type; |
| mem->placement = cur_flags; |
| return 0; |
| } |
| |
| if (!type_found) |
| return -EINVAL; |
| |
| for (i = 0; i < placement->num_busy_placement; ++i) { |
| ret = ttm_mem_type_from_flags(placement->busy_placement[i], |
| &mem_type); |
| if (ret) |
| man = &bdev->man[type]; |
| if (man->has_type) { |
| printk(KERN_ERR TTM_PFX |
| "Memory manager already initialized for type %d\n", |
| type); |
| return ret; |
| man = &bdev->man[mem_type]; |
| if (!man->has_type) |
| continue; |
| if (!ttm_bo_mt_compatible(man, |
| mem_type, |
| placement->busy_placement[i], |
| &cur_flags)) |
| continue; |
| |
| cur_flags = ttm_bo_select_caching(man, bo->mem.placement, |
| cur_flags); |
| /* |
| * Use the access and other non-mapping-related flag bits from |
| * the memory placement flags to the current flags |
| */ |
| ttm_flag_masked(&cur_flags, placement->busy_placement[i], |
| ~TTM_PL_MASK_MEMTYPE); |
| |
| |
| if (mem_type == TTM_PL_SYSTEM) { |
| mem->mem_type = mem_type; |
| mem->placement = cur_flags; |
| mem->mm_node = NULL; |
| return 0; |
| } |
| |
| ret = ttm_bo_mem_force_space(bo, mem_type, placement, mem, |
| interruptible, no_wait_gpu); |
| if (ret == 0 && mem->mm_node) { |
| mem->placement = cur_flags; |
| return 0; |
| } |
| if (ret == -ERESTARTSYS) |
| has_erestartsys = true; |
| } |
| ret = (has_erestartsys) ? -ERESTARTSYS : -ENOMEM; |
| return ret; |
| } |
| EXPORT_SYMBOL(ttm_bo_mem_space); |
| |
| int ttm_bo_move_buffer(struct ttm_buffer_object *bo, |
| struct ttm_placement *placement, |
| bool interruptible, |
| bool no_wait_gpu) |
| { |
| int ret = 0; |
| struct ttm_mem_reg mem; |
| struct ttm_bo_device *bdev = bo->bdev; |
| |
| // BUG_ON(!ttm_bo_is_reserved(bo)); |
| |
| /* |
| * FIXME: It's possible to pipeline buffer moves. |
| * Have the driver move function wait for idle when necessary, |
| * instead of doing it here. |
| */ |
| spin_lock(&bdev->fence_lock); |
| ret = ttm_bo_wait(bo, false, interruptible, no_wait_gpu); |
| spin_unlock(&bdev->fence_lock); |
| if (ret) |
| return ret; |
| mem.num_pages = bo->num_pages; |
| mem.size = mem.num_pages << PAGE_SHIFT; |
| mem.page_alignment = bo->mem.page_alignment; |
| mem.bus.io_reserved_vm = false; |
| mem.bus.io_reserved_count = 0; |
| /* |
| * Determine where to move the buffer. |
| */ |
| ret = ttm_bo_mem_space(bo, placement, &mem, |
| interruptible, no_wait_gpu); |
| if (ret) |
| goto out_unlock; |
| ret = ttm_bo_handle_move_mem(bo, &mem, false, |
| interruptible, no_wait_gpu); |
| out_unlock: |
| if (ret && mem.mm_node) |
| ttm_bo_mem_put(bo, &mem); |
| return ret; |
| } |
| #endif |
| |
| static int ttm_bo_mem_compat(struct ttm_placement *placement, |
| struct ttm_mem_reg *mem) |
| { |
| int i; |
| |
| if (mem->mm_node && placement->lpfn != 0 && |
| (mem->start < placement->fpfn || |
| mem->start + mem->num_pages > placement->lpfn)) |
| return -1; |
| |
| for (i = 0; i < placement->num_placement; i++) { |
| if ((placement->placement[i] & mem->placement & |
| TTM_PL_MASK_CACHING) && |
| (placement->placement[i] & mem->placement & |
| TTM_PL_MASK_MEM)) |
| return i; |
| } |
| return -1; |
| } |
| |
| int ttm_bo_validate(struct ttm_buffer_object *bo, |
| struct ttm_placement *placement, |
| bool interruptible, |
| bool no_wait_gpu) |
| { |
| int ret; |
| |
| // BUG_ON(!ttm_bo_is_reserved(bo)); |
| /* Check that range is valid */ |
| if (placement->lpfn || placement->fpfn) |
| if (placement->fpfn > placement->lpfn || |
| (placement->lpfn - placement->fpfn) < bo->num_pages) |
| return -EINVAL; |
| /* |
| * Check whether we need to move buffer. |
| */ |
| ret = ttm_bo_mem_compat(placement, &bo->mem); |
| if (ret < 0) { |
| // ret = ttm_bo_move_buffer(bo, placement, interruptible, |
| // no_wait_gpu); |
| if (ret) |
| return ret; |
| } else { |
| /* |
| * Use the access and other non-mapping-related flag bits from |
| * the compatible memory placement flags to the active flags |
| */ |
| ttm_flag_masked(&bo->mem.placement, placement->placement[ret], |
| ~TTM_PL_MASK_MEMTYPE); |
| } |
| /* |
| * We might need to add a TTM. |
| */ |
| if (bo->mem.mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) { |
| ret = ttm_bo_add_ttm(bo, true); |
| if (ret) |
| return ret; |
| } |
| return 0; |
| } |
| EXPORT_SYMBOL(ttm_bo_validate); |
| |
| int ttm_bo_check_placement(struct ttm_buffer_object *bo, |
| struct ttm_placement *placement) |
| { |
| BUG_ON((placement->fpfn || placement->lpfn) && |
| (bo->mem.num_pages > (placement->lpfn - placement->fpfn))); |
| |
| return 0; |
| } |
| |
| int ttm_bo_init(struct ttm_bo_device *bdev, |
| struct ttm_buffer_object *bo, |
| unsigned long size, |
| enum ttm_bo_type type, |
| struct ttm_placement *placement, |
| uint32_t page_alignment, |
| bool interruptible, |
| struct file *persistent_swap_storage, |
| size_t acc_size, |
| struct sg_table *sg, |
| void (*destroy) (struct ttm_buffer_object *)) |
| { |
| int ret = 0; |
| unsigned long num_pages; |
| struct ttm_mem_global *mem_glob = bdev->glob->mem_glob; |
| bool locked; |
| |
| // ret = ttm_mem_global_alloc(mem_glob, acc_size, false, false); |
| if (ret) { |
| pr_err("Out of kernel memory\n"); |
| if (destroy) |
| (*destroy)(bo); |
| else |
| kfree(bo); |
| return -ENOMEM; |
| } |
| |
| num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT; |
| if (num_pages == 0) { |
| pr_err("Illegal buffer object size\n"); |
| if (destroy) |
| (*destroy)(bo); |
| else |
| kfree(bo); |
| // ttm_mem_global_free(mem_glob, acc_size); |
| return -EINVAL; |
| } |
| bo->destroy = destroy; |
| |
| kref_init(&bo->kref); |
| kref_init(&bo->list_kref); |
| atomic_set(&bo->cpu_writers, 0); |
| INIT_LIST_HEAD(&bo->lru); |
| INIT_LIST_HEAD(&bo->ddestroy); |
| INIT_LIST_HEAD(&bo->swap); |
| INIT_LIST_HEAD(&bo->io_reserve_lru); |
| bo->bdev = bdev; |
| bo->glob = bdev->glob; |
| bo->type = type; |
| bo->num_pages = num_pages; |
| bo->mem.size = num_pages << PAGE_SHIFT; |
| bo->mem.mem_type = TTM_PL_SYSTEM; |
| bo->mem.num_pages = bo->num_pages; |
| bo->mem.mm_node = NULL; |
| bo->mem.page_alignment = page_alignment; |
| bo->mem.bus.io_reserved_vm = false; |
| bo->mem.bus.io_reserved_count = 0; |
| bo->priv_flags = 0; |
| bo->mem.placement = (TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_CACHED); |
| bo->persistent_swap_storage = persistent_swap_storage; |
| bo->acc_size = acc_size; |
| bo->sg = sg; |
| bo->resv = &bo->ttm_resv; |
| // reservation_object_init(bo->resv); |
| atomic_inc(&bo->glob->bo_count); |
| |
| ret = ttm_bo_check_placement(bo, placement); |
| |
| /* |
| * For ttm_bo_type_device buffers, allocate |
| * address space from the device. |
| */ |
| // if (likely(!ret) && |
| // (bo->type == ttm_bo_type_device || |
| // bo->type == ttm_bo_type_sg)) |
| // ret = ttm_bo_setup_vm(bo); |
| |
| // if (likely(!ret)) |
| // ret = ttm_bo_validate(bo, placement, interruptible, false); |
| |
| // ttm_bo_unreserve(bo); |
| |
| // if (unlikely(ret)) |
| // ttm_bo_unref(&bo); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL(ttm_bo_init); |
| |
| size_t ttm_bo_acc_size(struct ttm_bo_device *bdev, |
| unsigned long bo_size, |
| unsigned struct_size) |
| { |
| unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT; |
| size_t size = 0; |
| |
| size += ttm_round_pot(struct_size); |
| size += PAGE_ALIGN(npages * sizeof(void *)); |
| size += ttm_round_pot(sizeof(struct ttm_tt)); |
| return size; |
| } |
| EXPORT_SYMBOL(ttm_bo_acc_size); |
| |
| size_t ttm_bo_dma_acc_size(struct ttm_bo_device *bdev, |
| unsigned long bo_size, |
| unsigned struct_size) |
| { |
| unsigned npages = (PAGE_ALIGN(bo_size)) >> PAGE_SHIFT; |
| size_t size = 0; |
| |
| size += ttm_round_pot(struct_size); |
| size += PAGE_ALIGN(npages * sizeof(void *)); |
| size += PAGE_ALIGN(npages * sizeof(dma_addr_t)); |
| size += ttm_round_pot(sizeof(struct ttm_dma_tt)); |
| return size; |
| } |
| EXPORT_SYMBOL(ttm_bo_dma_acc_size); |
| |
| int ttm_bo_create(struct ttm_bo_device *bdev, |
| unsigned long size, |
| enum ttm_bo_type type, |
| struct ttm_placement *placement, |
| uint32_t page_alignment, |
| bool interruptible, |
| struct file *persistent_swap_storage, |
| struct ttm_buffer_object **p_bo) |
| { |
| struct ttm_buffer_object *bo; |
| size_t acc_size; |
| int ret; |
| |
| bo = kzalloc(sizeof(*bo), GFP_KERNEL); |
| if (unlikely(bo == NULL)) |
| return -ENOMEM; |
| |
| acc_size = ttm_bo_acc_size(bdev, size, sizeof(struct ttm_buffer_object)); |
| ret = ttm_bo_init(bdev, bo, size, type, placement, page_alignment, |
| interruptible, persistent_swap_storage, acc_size, |
| NULL, NULL); |
| if (likely(ret == 0)) |
| *p_bo = bo; |
| |
| return ret; |
| } |
| EXPORT_SYMBOL(ttm_bo_create); |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
| int ttm_bo_init_mm(struct ttm_bo_device *bdev, unsigned type, |
| unsigned long p_size) |
| { |
| int ret = -EINVAL; |
| struct ttm_mem_type_manager *man; |
| |
| ENTER(); |
| |
| BUG_ON(type >= TTM_NUM_MEM_TYPES); |
| man = &bdev->man[type]; |
| BUG_ON(man->has_type); |
| man->io_reserve_fastpath = true; |
| man->use_io_reserve_lru = false; |
| mutex_init(&man->io_reserve_mutex); |
| INIT_LIST_HEAD(&man->io_reserve_lru); |
| |
| ret = bdev->driver->init_mem_type(bdev, type, man); |
| if (ret) |
| return ret; |
| man->bdev = bdev; |
| |
| ret = 0; |
| if (type != TTM_PL_SYSTEM) { |
| ret = (*man->func->init)(man, p_size); |
| if (!p_size) { |
| printk(KERN_ERR TTM_PFX |
| "Zero size memory manager type %d\n", |
| type); |
| return ret; |
| } |
| ret = drm_mm_init(&man->manager, 0, p_size); |
| if (ret) |
| return ret; |
| } |
| 1258,32 → 84,21 |
|---|
| |
| INIT_LIST_HEAD(&man->lru); |
| |
| LEAVE(); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(ttm_bo_init_mm); |
| |
| |
| void ttm_bo_global_release(struct drm_global_reference *ref) |
| int ttm_bo_global_init(struct ttm_global_reference *ref) |
| { |
| struct ttm_bo_global *glob = ref->object; |
| |
| } |
| EXPORT_SYMBOL(ttm_bo_global_release); |
| |
| int ttm_bo_global_init(struct drm_global_reference *ref) |
| { |
| struct ttm_bo_global_ref *bo_ref = |
| container_of(ref, struct ttm_bo_global_ref, ref); |
| struct ttm_bo_global *glob = ref->object; |
| int ret; |
| |
| ENTER(); |
| |
| mutex_init(&glob->device_list_mutex); |
| spin_lock_init(&glob->lru_lock); |
| // mutex_init(&glob->device_list_mutex); |
| // spin_lock_init(&glob->lru_lock); |
| glob->mem_glob = bo_ref->mem_glob; |
| glob->dummy_read_page = AllocPage(); |
| // glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32); |
| |
| if (unlikely(glob->dummy_read_page == NULL)) { |
| ret = -ENOMEM; |
| 1293,81 → 108,34 |
|---|
| INIT_LIST_HEAD(&glob->swap_lru); |
| INIT_LIST_HEAD(&glob->device_list); |
| |
| atomic_set(&glob->bo_count, 0); |
| // ttm_mem_init_shrink(&glob->shrink, ttm_bo_swapout); |
| ret = ttm_mem_register_shrink(glob->mem_glob, &glob->shrink); |
| if (unlikely(ret != 0)) { |
| printk(KERN_ERR TTM_PFX |
| "Could not register buffer object swapout.\n"); |
| goto out_no_shrink; |
| } |
| |
| LEAVE(); |
| glob->ttm_bo_extra_size = |
| ttm_round_pot(sizeof(struct ttm_tt)) + |
| ttm_round_pot(sizeof(struct ttm_backend)); |
| |
| return 0; |
| glob->ttm_bo_size = glob->ttm_bo_extra_size + |
| ttm_round_pot(sizeof(struct ttm_buffer_object)); |
| |
| atomic_set(&glob->bo_count, 0); |
| |
| // kobject_init(&glob->kobj, &ttm_bo_glob_kobj_type); |
| // ret = kobject_add(&glob->kobj, ttm_get_kobj(), "buffer_objects"); |
| // if (unlikely(ret != 0)) |
| // kobject_put(&glob->kobj); |
| return ret; |
| out_no_shrink: |
| __free_page(glob->dummy_read_page); |
| out_no_drp: |
| kfree(glob); |
| return ret; |
| } |
| EXPORT_SYMBOL(ttm_bo_global_init); |
| |
| |
| int ttm_bo_device_init(struct ttm_bo_device *bdev, |
| struct ttm_bo_global *glob, |
| struct ttm_bo_driver *driver, |
| uint64_t file_page_offset, |
| bool need_dma32) |
| { |
| int ret = -EINVAL; |
| |
| ENTER(); |
| |
| // rwlock_init(&bdev->vm_lock); |
| bdev->driver = driver; |
| |
| memset(bdev->man, 0, sizeof(bdev->man)); |
| |
| /* |
| * Initialize the system memory buffer type. |
| * Other types need to be driver / IOCTL initialized. |
| */ |
| ret = ttm_bo_init_mm(bdev, TTM_PL_SYSTEM, 0); |
| if (unlikely(ret != 0)) |
| goto out_no_sys; |
| |
| bdev->addr_space_rb = RB_ROOT; |
| drm_mm_init(&bdev->addr_space_mm, file_page_offset, 0x10000000); |
| |
| // INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue); |
| INIT_LIST_HEAD(&bdev->ddestroy); |
| bdev->dev_mapping = NULL; |
| bdev->glob = glob; |
| bdev->need_dma32 = need_dma32; |
| bdev->val_seq = 0; |
| spin_lock_init(&bdev->fence_lock); |
| mutex_lock(&glob->device_list_mutex); |
| list_add_tail(&bdev->device_list, &glob->device_list); |
| mutex_unlock(&glob->device_list_mutex); |
| |
| LEAVE(); |
| |
| return 0; |
| out_no_sys: |
| return ret; |
| } |
| EXPORT_SYMBOL(ttm_bo_device_init); |
| |
| /* |
| * buffer object vm functions. |
| */ |
| |
| bool ttm_mem_reg_is_pci(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem) |
| { |
| struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type]; |
| |
| if (!(man->flags & TTM_MEMTYPE_FLAG_FIXED)) { |
| if (mem->mem_type == TTM_PL_SYSTEM) |
| return false; |
| |
| if (man->flags & TTM_MEMTYPE_FLAG_CMA) |
| return false; |
| |
| if (mem->placement & TTM_PL_FLAG_CACHED) |
| return false; |
| } |
| return true; |
| } |
| |