PPC: Enable doorbell excp handlers
[qemu.git] / dma.h
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 ScatterGatherEntry ScatterGatherEntry;
19
20 #if defined(TARGET_PHYS_ADDR_BITS)
21 typedef target_phys_addr_t dma_addr_t;
22
23 #define DMA_ADDR_FMT TARGET_FMT_plx
24
25 typedef enum {
26 DMA_DIRECTION_TO_DEVICE = 0,
27 DMA_DIRECTION_FROM_DEVICE = 1,
28 } DMADirection;
29
30 struct ScatterGatherEntry {
31 dma_addr_t base;
32 dma_addr_t len;
33 };
34
35 struct QEMUSGList {
36 ScatterGatherEntry *sg;
37 int nsg;
38 int nalloc;
39 dma_addr_t size;
40 };
41
42 void qemu_sglist_init(QEMUSGList *qsg, int alloc_hint);
43 void qemu_sglist_add(QEMUSGList *qsg, dma_addr_t base, dma_addr_t len);
44 void qemu_sglist_destroy(QEMUSGList *qsg);
45 #endif
46
47 typedef BlockDriverAIOCB *DMAIOFunc(BlockDriverState *bs, int64_t sector_num,
48 QEMUIOVector *iov, int nb_sectors,
49 BlockDriverCompletionFunc *cb, void *opaque);
50
51 BlockDriverAIOCB *dma_bdrv_io(BlockDriverState *bs,
52 QEMUSGList *sg, uint64_t sector_num,
53 DMAIOFunc *io_func, BlockDriverCompletionFunc *cb,
54 void *opaque, bool to_dev);
55 BlockDriverAIOCB *dma_bdrv_read(BlockDriverState *bs,
56 QEMUSGList *sg, uint64_t sector,
57 BlockDriverCompletionFunc *cb, void *opaque);
58 BlockDriverAIOCB *dma_bdrv_write(BlockDriverState *bs,
59 QEMUSGList *sg, uint64_t sector,
60 BlockDriverCompletionFunc *cb, void *opaque);
61 #endif