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Line 518... Line 518...
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 *
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 *
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 * @driver: Pointer to a struct ttm_bo_driver struct setup by the driver.
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 * @driver: Pointer to a struct ttm_bo_driver struct setup by the driver.
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 * @man: An array of mem_type_managers.
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 * @man: An array of mem_type_managers.
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 * @fence_lock: Protects the synchronizing members on *all* bos belonging
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 * @fence_lock: Protects the synchronizing members on *all* bos belonging
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 * to this device.
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 * to this device.
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 * @addr_space_mm: Range manager for the device address space.
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 * @vma_manager: Address space manager
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 * lru_lock: Spinlock that protects the buffer+device lru lists and
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 * lru_lock: Spinlock that protects the buffer+device lru lists and
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 * ddestroy lists.
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 * ddestroy lists.
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 * @val_seq: Current validation sequence.
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 * @val_seq: Current validation sequence.
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 * @dev_mapping: A pointer to the struct address_space representing the
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 * @dev_mapping: A pointer to the struct address_space representing the
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 * device address space.
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 * device address space.
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extern void ttm_mem_io_free_vm(struct ttm_buffer_object *bo);
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extern void ttm_mem_io_free_vm(struct ttm_buffer_object *bo);
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extern int ttm_mem_io_lock(struct ttm_mem_type_manager *man,
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extern int ttm_mem_io_lock(struct ttm_mem_type_manager *man,
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			   bool interruptible);
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			   bool interruptible);
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extern void ttm_mem_io_unlock(struct ttm_mem_type_manager *man);
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extern void ttm_mem_io_unlock(struct ttm_mem_type_manager *man);
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extern void ttm_bo_del_sub_from_lru(struct ttm_buffer_object *bo);
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extern void ttm_bo_add_to_lru(struct ttm_buffer_object *bo);
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/**
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 * ttm_bo_reserve_nolru:
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 *
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 * @bo: A pointer to a struct ttm_buffer_object.
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 * @interruptible: Sleep interruptible if waiting.
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 * @no_wait: Don't sleep while trying to reserve, rather return -EBUSY.
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 * @use_ticket: If @bo is already reserved, Only sleep waiting for
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 * it to become unreserved if @ticket->stamp is older.
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 *
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 * Will not remove reserved buffers from the lru lists.
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 * Otherwise identical to ttm_bo_reserve.
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 *
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 * Returns:
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 * -EDEADLK: The reservation may cause a deadlock.
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 * Release all buffer reservations, wait for @bo to become unreserved and
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 * try again. (only if use_sequence == 1).
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 * -ERESTARTSYS: A wait for the buffer to become unreserved was interrupted by
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 * a signal. Release all buffer reservations and return to user-space.
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 * -EBUSY: The function needed to sleep, but @no_wait was true
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 * -EALREADY: Bo already reserved using @ticket. This error code will only
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 * be returned if @use_ticket is set to true.
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 */
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static inline int ttm_bo_reserve_nolru(struct ttm_buffer_object *bo,
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				       bool interruptible,
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				       bool no_wait, bool use_ticket,
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				       struct ww_acquire_ctx *ticket)
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{
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	int ret = 0;
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/*
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	if (no_wait) {
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		bool success;
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		if (WARN_ON(ticket))
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			return -EBUSY;
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		success = ww_mutex_trylock(&bo->resv->lock);
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		return success ? 0 : -EBUSY;
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	}
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	if (interruptible)
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		ret = ww_mutex_lock_interruptible(&bo->resv->lock, ticket);
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	else
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		ret = ww_mutex_lock(&bo->resv->lock, ticket);
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	if (ret == -EINTR)
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		return -ERESTARTSYS;
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*/
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	return ret;
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}
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/**
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/**
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 * ttm_bo_reserve:
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 * ttm_bo_reserve:
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	if (!(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) {
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	if (!(bo->mem.placement & TTM_PL_FLAG_NO_EVICT)) {
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		spin_lock(&bo->glob->lru_lock);
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		spin_lock(&bo->glob->lru_lock);
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		ttm_bo_add_to_lru(bo);
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		ttm_bo_add_to_lru(bo);
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		spin_unlock(&bo->glob->lru_lock);
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		spin_unlock(&bo->glob->lru_lock);
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	}
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	}
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	ww_mutex_unlock(&bo->resv->lock);
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//   ww_mutex_unlock(&bo->resv->lock);
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}
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}
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/**
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/**
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 * ttm_bo_unreserve
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 * ttm_bo_unreserve