1/*
2 * Copyright (c) 2011 ETH Zurich.
3 * All rights reserved.
4 *
5 * This file is distributed under the terms in the attached LICENSE file.
6 * If you do not find this file, copies can be found by writing to:
7 * ETH Zurich D-INFK, Haldeneggsteig 4, CH-8092 Zurich. Attn: Systems Group.
8 */
9
10#ifndef _AHCI_DMA_POOL_H
11#define _AHCI_DMA_POOL_H
12#include <string.h>
13
14struct ahci_dma_region {
15    void *vaddr;
16    genpaddr_t paddr;
17    size_t size;
18    size_t backing_region;
19};
20
21errval_t ahci_dma_pool_init(size_t pool_size);
22errval_t ahci_dma_region_alloc(size_t size, struct ahci_dma_region **retregion);
23errval_t ahci_dma_region_alloc_aligned(size_t size, size_t alignment_requirement, struct ahci_dma_region **retregion);
24errval_t ahci_dma_region_free(struct ahci_dma_region *region);
25
26static inline void *ahci_dma_region_copy_in(struct ahci_dma_region *region, const void *buf, genvaddr_t offset, size_t size) {
27    void *dest = (char *)region->vaddr + offset;
28    return memcpy(dest, buf, size);
29}
30static inline void *ahci_dma_region_copy_out(struct ahci_dma_region *region, void *buf, genvaddr_t offset, size_t size) {
31    void *src_ = (char *)region->vaddr + offset;
32    return memcpy(buf, src_, size);
33}
34
35#endif // _AHCI_DMA_POOL_H
36