149 	struct sun4i_dma_contract	*contract;  member
163 /* A contract is a set of promises */
326  * from the next pending contract.
334 	struct sun4i_dma_contract *contract = NULL;  in __execute_vchan_pending()  local
358 		/* Figure out which contract we're working with today */  in __execute_vchan_pending()
362 				"No pending contract found");  in __execute_vchan_pending()
367 		contract = to_sun4i_dma_contract(vd);  in __execute_vchan_pending()
368 		if (list_empty(&contract->demands)) {  in __execute_vchan_pending()
369 			/* The contract has been completed so mark it as such */  in __execute_vchan_pending()
370 			list_del(&contract->vd.node);  in __execute_vchan_pending()
371 			vchan_cookie_complete(&contract->vd);  in __execute_vchan_pending()
373 				"Empty contract found and marked complete");  in __execute_vchan_pending()
375 	} while (list_empty(&contract->demands));  in __execute_vchan_pending()
378 	promise = list_first_entry(&contract->demands,  in __execute_vchan_pending()
384 		vchan->contract = contract;  in __execute_vchan_pending()
386 		set_pchan_interrupt(priv, pchan, contract->use_half_int, 1);  in __execute_vchan_pending()
434  * Generate a promise, to be used in a normal DMA contract.
438  * promise will live in the demands list on a contract. Once it has been
440  * All linked promises will be freed when the corresponding contract is freed
501  * Generate a promise, to be used in a dedicated DMA contract.
505  * promise will live in the demands list on a contract. Once it has been
507  * All linked promises will be freed when the corresponding contract is freed
558  * Generate a contract
561  * linked lists, we need to implement SG via software. We use a contract
567 	struct sun4i_dma_contract *contract;  in generate_dma_contract()  local
569 	contract = kzalloc(sizeof(*contract), GFP_NOWAIT);  in generate_dma_contract()
570 	if (!contract)  in generate_dma_contract()
573 	INIT_LIST_HEAD(&contract->demands);  in generate_dma_contract()
574 	INIT_LIST_HEAD(&contract->completed_demands);  in generate_dma_contract()
576 	return contract;  in generate_dma_contract()
583  * loop. This function returns the next promise from a cyclic contract,
587 get_next_cyclic_promise(struct sun4i_dma_contract *contract)  in get_next_cyclic_promise()  argument
591 	promise = list_first_entry_or_null(&contract->demands,  in get_next_cyclic_promise()
594 		list_splice_init(&contract->completed_demands,  in get_next_cyclic_promise()
595 				 &contract->demands);  in get_next_cyclic_promise()
596 		promise = list_first_entry(&contract->demands,  in get_next_cyclic_promise()
604  * Free a contract and all its associated promises
608 	struct sun4i_dma_contract *contract = to_sun4i_dma_contract(vd);  in sun4i_dma_free_contract()  local
612 	list_for_each_entry_safe(promise, tmp, &contract->demands, list)  in sun4i_dma_free_contract()
615 	list_for_each_entry_safe(promise, tmp, &contract->completed_demands, list)  in sun4i_dma_free_contract()
618 	kfree(contract);  in sun4i_dma_free_contract()
628 	struct sun4i_dma_contract *contract;  in sun4i_dma_prep_dma_memcpy()  local
630 	contract = generate_dma_contract();  in sun4i_dma_prep_dma_memcpy()
631 	if (!contract)  in sun4i_dma_prep_dma_memcpy()
651 		kfree(contract);  in sun4i_dma_prep_dma_memcpy()
664 	/* Fill the contract with our only promise */  in sun4i_dma_prep_dma_memcpy()
665 	list_add_tail(&promise->list, &contract->demands);  in sun4i_dma_prep_dma_memcpy()
668 	return vchan_tx_prep(&vchan->vc, &contract->vd, flags);  in sun4i_dma_prep_dma_memcpy()
679 	struct sun4i_dma_contract *contract;  in sun4i_dma_prep_dma_cyclic()  local
690 	contract = generate_dma_contract();  in sun4i_dma_prep_dma_cyclic()
691 	if (!contract)  in sun4i_dma_prep_dma_cyclic()
694 	contract->is_cyclic = 1;  in sun4i_dma_prep_dma_cyclic()
756 		contract->use_half_int = 1;  in sun4i_dma_prep_dma_cyclic()
783 		/* Then add it to the contract */  in sun4i_dma_prep_dma_cyclic()
784 		list_add_tail(&promise->list, &contract->demands);  in sun4i_dma_prep_dma_cyclic()
788 	return vchan_tx_prep(&vchan->vc, &contract->vd, flags);  in sun4i_dma_prep_dma_cyclic()
799 	struct sun4i_dma_contract *contract;  in sun4i_dma_prep_slave_sg()  local
814 	contract = generate_dma_contract();  in sun4i_dma_prep_slave_sg()
815 	if (!contract)  in sun4i_dma_prep_slave_sg()
876 		/* Then add it to the contract */  in sun4i_dma_prep_slave_sg()
877 		list_add_tail(&promise->list, &contract->demands);  in sun4i_dma_prep_slave_sg()
881 	 * Once we've got all the promises ready, add the contract  in sun4i_dma_prep_slave_sg()
884 	return vchan_tx_prep(&vchan->vc, &contract->vd, flags);  in sun4i_dma_prep_slave_sg()
969 	struct sun4i_dma_contract *contract;  in sun4i_dma_tx_status()  local
984 	contract = to_sun4i_dma_contract(vd);  in sun4i_dma_tx_status()
986 	list_for_each_entry(promise, &contract->demands, list)  in sun4i_dma_tx_status()
994 	promise = list_first_entry_or_null(&contract->demands,  in sun4i_dma_tx_status()
1035 	struct sun4i_dma_contract *contract;  in sun4i_dma_interrupt()  local
1052 		contract = vchan->contract;  in sun4i_dma_interrupt()
1066 				       &contract->completed_demands);  in sun4i_dma_interrupt()
1081 			if (contract->is_cyclic) {  in sun4i_dma_interrupt()
1082 				promise = get_next_cyclic_promise(contract);  in sun4i_dma_interrupt()
1085 				vchan_cyclic_callback(&contract->vd);  in sun4i_dma_interrupt()
1098 			if (contract->is_cyclic)  in sun4i_dma_interrupt()
1099 				vchan_cyclic_callback(&contract->vd);  in sun4i_dma_interrupt()