Lines Matching +full:dma +full:- +full:pool

1 /* SPDX-License-Identifier: GPL-2.0 */
3 /* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
4  * Copyright (C) 2019-2022 Linaro Ltd.
12 #include <linux/dma-direction.h>
29  * struct gsi_trans - a GSI transaction
41  * @direction:	DMA transfer direction (DMA_NONE for commands)
76  * gsi_trans_pool_init() - Initialize a pool of structures for transactions
77  * @pool:	GSI transaction pool pointer
78  * @size:	Size of elements in the pool
79  * @count:	Minimum number of elements in the pool
80  * @max_alloc:	Maximum number of elements allocated at a time from pool
84 int gsi_trans_pool_init(struct gsi_trans_pool *pool, size_t size, u32 count,
88  * gsi_trans_pool_alloc() - Allocate one or more elements from a pool
89  * @pool:	Pool pointer
90  * @count:	Number of elements to allocate from the pool
92  * Return:	Virtual address of element(s) allocated from the pool
94 void *gsi_trans_pool_alloc(struct gsi_trans_pool *pool, u32 count);
97  * gsi_trans_pool_exit() - Inverse of gsi_trans_pool_init()
98  * @pool:	Pool pointer
100 void gsi_trans_pool_exit(struct gsi_trans_pool *pool);
103  * gsi_trans_pool_init_dma() - Initialize a pool of DMA-able structures
104  * @dev:	Device used for DMA
105  * @pool:	Pool pointer
106  * @size:	Size of elements in the pool
107  * @count:	Minimum number of elements in the pool
108  * @max_alloc:	Maximum number of elements allocated at a time from pool
112  * Structures in this pool reside in DMA-coherent memory.
114 int gsi_trans_pool_init_dma(struct device *dev, struct gsi_trans_pool *pool,
118  * gsi_trans_pool_alloc_dma() - Allocate an element from a DMA pool
119  * @pool:	DMA pool pointer
120  * @addr:	DMA address "handle" associated with the allocation
122  * Return:	Virtual address of element allocated from the pool
124  * Only one element at a time may be allocated from a DMA pool.
126 void *gsi_trans_pool_alloc_dma(struct gsi_trans_pool *pool, dma_addr_t *addr);
129  * gsi_trans_pool_exit_dma() - Inverse of gsi_trans_pool_init_dma()
130  * @dev:	Device used for DMA
131  * @pool:	Pool pointer
133 void gsi_trans_pool_exit_dma(struct device *dev, struct gsi_trans_pool *pool);
136  * gsi_channel_trans_idle() - Return whether no transactions are allocated
146  * gsi_channel_trans_alloc() - Allocate a GSI transaction on a channel
150  * @direction:	DMA direction for entire SGL (or DMA_NONE)
160  * gsi_trans_free() - Free a previously-allocated GSI transaction
166  * gsi_trans_cmd_add() - Add an immediate command to a transaction
170  * @addr:	DMA address for payload
177  * gsi_trans_page_add() - Add a page transfer to a transaction
187  * gsi_trans_skb_add() - Add a socket transfer to a transaction
191  * Return:	0, or -EMSGSIZE if socket data won't fit in transaction.
196  * gsi_trans_commit() - Commit a GSI transaction
203  * gsi_trans_commit_wait() - Commit a GSI transaction and wait for it
210  * gsi_trans_read_byte() - Issue a single byte read TRE on a channel
213  * @addr:	DMA address into which to transfer the one byte
221  * gsi_trans_read_byte_done() - Clean up after a single byte read TRE