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) 2019-2020 Linaro Ltd.
12 #include <linux/dma-direction.h>
25  * struct gsi_trans - a GSI transaction
38  * @direction:	DMA transfer direction (DMA_NONE for commands)
72  * gsi_trans_pool_init() - Initialize a pool of structures for transactions
74  * @size:	Size of elements in the pool
75  * @count:	Minimum number of elements in the pool
76  * @max_alloc:	Maximum number of elements allocated at a time from pool
80 int gsi_trans_pool_init(struct gsi_trans_pool *pool, size_t size, u32 count,
84  * gsi_trans_pool_alloc() - Allocate one or more elements from a pool
85  * @pool:	Pool pointer
86  * @count:	Number of elements to allocate from the pool
88  * Return:	Virtual address of element(s) allocated from the pool
90 void *gsi_trans_pool_alloc(struct gsi_trans_pool *pool, u32 count);
93  * gsi_trans_pool_exit() - Inverse of gsi_trans_pool_init()
94  * @pool:	Pool pointer
96 void gsi_trans_pool_exit(struct gsi_trans_pool *pool);
99  * gsi_trans_pool_init_dma() - Initialize a pool of DMA-able structures
100  * @dev:	Device used for DMA
101  * @pool:	Pool pointer
102  * @size:	Size of elements in the pool
103  * @count:	Minimum number of elements in the pool
104  * @max_alloc:	Maximum number of elements allocated at a time from pool
108  * Structures in this pool reside in DMA-coherent memory.
110 int gsi_trans_pool_init_dma(struct device *dev, struct gsi_trans_pool *pool,
114  * gsi_trans_pool_alloc_dma() - Allocate an element from a DMA pool
115  * @pool:	DMA pool pointer
116  * @addr:	DMA address "handle" associated with the allocation
118  * Return:	Virtual address of element allocated from the pool
120  * Only one element at a time may be allocated from a DMA pool.
122 void *gsi_trans_pool_alloc_dma(struct gsi_trans_pool *pool, dma_addr_t *addr);
125  * gsi_trans_pool_exit() - Inverse of gsi_trans_pool_init()
126  * @pool:	Pool pointer
128 void gsi_trans_pool_exit_dma(struct device *dev, struct gsi_trans_pool *pool);
131  * gsi_channel_trans_alloc() - Allocate a GSI transaction on a channel
135  * @direction:	DMA direction for entire SGL (or DMA_NONE)
145  * gsi_trans_free() - Free a previously-allocated GSI transaction
151  * gsi_trans_cmd_add() - Add an immediate command to a transaction
155  * @addr:	DMA address for payload
156  * @direction:	Direction of DMA transfer (or DMA_NONE if none required)
164  * gsi_trans_page_add() - Add a page transfer to a transaction
174  * gsi_trans_skb_add() - Add a socket transfer to a transaction
178  * Return:	0, or -EMSGSIZE if socket data won't fit in transaction.
183  * gsi_trans_commit() - Commit a GSI transaction
190  * gsi_trans_commit_wait() - Commit a GSI transaction and wait for it
197  * gsi_trans_commit_wait_timeout() - Commit a GSI transaction and wait for
206  * gsi_trans_read_byte() - Issue a single byte read TRE on a channel
209  * @addr:	DMA address into which to transfer the one byte
217  * gsi_trans_read_byte_done() - Clean up after a single byte read TRE