dma.h revision 34c48ff1e3ad5cd2084ca40188754d45f423750b 
1/*
2 * DMA helper functions
3 *
4 * Copyright (c) 2009 Red Hat
5 *
6 * This work is licensed under the terms of the GNU General Public License
7 * (GNU GPL), version 2 or later.
8 */
9
10#ifndef DMA_H
11#define DMA_H
12
13#include <stdio.h>
14//#include "cpu.h"
15#include "hw/hw.h"
16#include "block.h"
17
18typedef struct {
19    target_phys_addr_t base;
20    target_phys_addr_t len;
21} ScatterGatherEntry;
22
23typedef struct {
24    ScatterGatherEntry *sg;
25    int nsg;
26    int nalloc;
27    target_phys_addr_t size;
28} QEMUSGList;
29
30void qemu_sglist_init(QEMUSGList *qsg, int alloc_hint);
31void qemu_sglist_add(QEMUSGList *qsg, target_phys_addr_t base,
32                     target_phys_addr_t len);
33void qemu_sglist_destroy(QEMUSGList *qsg);
34
35BlockDriverAIOCB *dma_bdrv_read(BlockDriverState *bs,
36                                QEMUSGList *sg, uint64_t sector,
37                                BlockDriverCompletionFunc *cb, void *opaque);
38BlockDriverAIOCB *dma_bdrv_write(BlockDriverState *bs,
39                                 QEMUSGList *sg, uint64_t sector,
40                                 BlockDriverCompletionFunc *cb, void *opaque);
41#endif
42