139 	struct sun4i_dma_contract	*contract;  member
153 /* A contract is a set of promises */
315  * from the next pending contract.
323 	struct sun4i_dma_contract *contract = NULL;  in __execute_vchan_pending()  local
347 		/* Figure out which contract we're working with today */  in __execute_vchan_pending()
351 				"No pending contract found");  in __execute_vchan_pending()
356 		contract = to_sun4i_dma_contract(vd);  in __execute_vchan_pending()
357 		if (list_empty(&contract->demands)) {  in __execute_vchan_pending()
358 			/* The contract has been completed so mark it as such */  in __execute_vchan_pending()
359 			list_del(&contract->vd.node);  in __execute_vchan_pending()
360 			vchan_cookie_complete(&contract->vd);  in __execute_vchan_pending()
362 				"Empty contract found and marked complete");  in __execute_vchan_pending()
364 	} while (list_empty(&contract->demands));  in __execute_vchan_pending()
367 	promise = list_first_entry(&contract->demands,  in __execute_vchan_pending()
373 		vchan->contract = contract;  in __execute_vchan_pending()
375 		set_pchan_interrupt(priv, pchan, contract->is_cyclic, 1);  in __execute_vchan_pending()
423  * Generate a promise, to be used in a normal DMA contract.
427  * promise will live in the demands list on a contract. Once it has been
429  * All linked promises will be freed when the corresponding contract is freed
490  * Generate a promise, to be used in a dedicated DMA contract.
494  * promise will live in the demands list on a contract. Once it has been
496  * All linked promises will be freed when the corresponding contract is freed
547  * Generate a contract
550  * linked lists, we need to implement SG via software. We use a contract
556 	struct sun4i_dma_contract *contract;  in generate_dma_contract()  local
558 	contract = kzalloc(sizeof(*contract), GFP_NOWAIT);  in generate_dma_contract()
559 	if (!contract)  in generate_dma_contract()
562 	INIT_LIST_HEAD(&contract->demands);  in generate_dma_contract()
563 	INIT_LIST_HEAD(&contract->completed_demands);  in generate_dma_contract()
565 	return contract;  in generate_dma_contract()
572  * loop. This function returns the next promise from a cyclic contract,
576 get_next_cyclic_promise(struct sun4i_dma_contract *contract)  in get_next_cyclic_promise()  argument
580 	promise = list_first_entry_or_null(&contract->demands,  in get_next_cyclic_promise()
583 		list_splice_init(&contract->completed_demands,  in get_next_cyclic_promise()
584 				 &contract->demands);  in get_next_cyclic_promise()
585 		promise = list_first_entry(&contract->demands,  in get_next_cyclic_promise()
593  * Free a contract and all its associated promises
597 	struct sun4i_dma_contract *contract = to_sun4i_dma_contract(vd);  in sun4i_dma_free_contract()  local
601 	list_for_each_entry_safe(promise, tmp, &contract->demands, list)  in sun4i_dma_free_contract()
604 	list_for_each_entry_safe(promise, tmp, &contract->completed_demands, list)  in sun4i_dma_free_contract()
607 	kfree(contract);  in sun4i_dma_free_contract()
617 	struct sun4i_dma_contract *contract;  in sun4i_dma_prep_dma_memcpy()  local
619 	contract = generate_dma_contract();  in sun4i_dma_prep_dma_memcpy()
620 	if (!contract)  in sun4i_dma_prep_dma_memcpy()
640 		kfree(contract);  in sun4i_dma_prep_dma_memcpy()
653 	/* Fill the contract with our only promise */  in sun4i_dma_prep_dma_memcpy()
654 	list_add_tail(&promise->list, &contract->demands);  in sun4i_dma_prep_dma_memcpy()
657 	return vchan_tx_prep(&vchan->vc, &contract->vd, flags);  in sun4i_dma_prep_dma_memcpy()
668 	struct sun4i_dma_contract *contract;  in sun4i_dma_prep_dma_cyclic()  local
679 	contract = generate_dma_contract();  in sun4i_dma_prep_dma_cyclic()
680 	if (!contract)  in sun4i_dma_prep_dma_cyclic()
683 	contract->is_cyclic = 1;  in sun4i_dma_prep_dma_cyclic()
763 		/* Then add it to the contract */  in sun4i_dma_prep_dma_cyclic()
764 		list_add_tail(&promise->list, &contract->demands);  in sun4i_dma_prep_dma_cyclic()
768 	return vchan_tx_prep(&vchan->vc, &contract->vd, flags);  in sun4i_dma_prep_dma_cyclic()
779 	struct sun4i_dma_contract *contract;  in sun4i_dma_prep_slave_sg()  local
794 	contract = generate_dma_contract();  in sun4i_dma_prep_slave_sg()
795 	if (!contract)  in sun4i_dma_prep_slave_sg()
856 		/* Then add it to the contract */  in sun4i_dma_prep_slave_sg()
857 		list_add_tail(&promise->list, &contract->demands);  in sun4i_dma_prep_slave_sg()
861 	 * Once we've got all the promises ready, add the contract  in sun4i_dma_prep_slave_sg()
864 	return vchan_tx_prep(&vchan->vc, &contract->vd, flags);  in sun4i_dma_prep_slave_sg()
949 	struct sun4i_dma_contract *contract;  in sun4i_dma_tx_status()  local
964 	contract = to_sun4i_dma_contract(vd);  in sun4i_dma_tx_status()
966 	list_for_each_entry(promise, &contract->demands, list)  in sun4i_dma_tx_status()
974 	promise = list_first_entry_or_null(&contract->demands,  in sun4i_dma_tx_status()
1015 	struct sun4i_dma_contract *contract;  in sun4i_dma_interrupt()  local
1032 		contract = vchan->contract;  in sun4i_dma_interrupt()
1047 				      &contract->completed_demands);  in sun4i_dma_interrupt()
1062 			if (contract->is_cyclic) {  in sun4i_dma_interrupt()
1063 				promise = get_next_cyclic_promise(contract);  in sun4i_dma_interrupt()
1066 				vchan_cyclic_callback(&contract->vd);  in sun4i_dma_interrupt()
1079 			if (contract->is_cyclic)  in sun4i_dma_interrupt()
1080 				vchan_cyclic_callback(&contract->vd);  in sun4i_dma_interrupt()