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100644 42 lines (35 sloc) 1.111 kB
68396ea @rmustacc Initial commit of d32e8d0b8d9e0ef7cf7ab2e74548982972789dfc from qemu-kvm
rmustacc authored
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
18 typedef struct {
19 target_phys_addr_t base;
20 target_phys_addr_t len;
21 } ScatterGatherEntry;
22
23 typedef struct {
24 ScatterGatherEntry *sg;
25 int nsg;
26 int nalloc;
27 target_phys_addr_t size;
28 } QEMUSGList;
29
30 void qemu_sglist_init(QEMUSGList *qsg, int alloc_hint);
31 void qemu_sglist_add(QEMUSGList *qsg, target_phys_addr_t base,
32 target_phys_addr_t len);
33 void qemu_sglist_destroy(QEMUSGList *qsg);
34
35 BlockDriverAIOCB *dma_bdrv_read(BlockDriverState *bs,
36 QEMUSGList *sg, uint64_t sector,
37 BlockDriverCompletionFunc *cb, void *opaque);
38 BlockDriverAIOCB *dma_bdrv_write(BlockDriverState *bs,
39 QEMUSGList *sg, uint64_t sector,
40 BlockDriverCompletionFunc *cb, void *opaque);
41 #endif
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