mirror of https://gitee.com/openkylin/qemu.git
50 lines
1.6 KiB
C
50 lines
1.6 KiB
C
/*
|
|
* DMA helper functions
|
|
*
|
|
* Copyright (c) 2009 Red Hat
|
|
*
|
|
* This work is licensed under the terms of the GNU General Public License
|
|
* (GNU GPL), version 2 or later.
|
|
*/
|
|
|
|
#ifndef DMA_H
|
|
#define DMA_H
|
|
|
|
#include <stdio.h>
|
|
//#include "cpu.h"
|
|
#include "hw/hw.h"
|
|
#include "block.h"
|
|
|
|
typedef struct {
|
|
target_phys_addr_t base;
|
|
target_phys_addr_t len;
|
|
} ScatterGatherEntry;
|
|
|
|
struct QEMUSGList {
|
|
ScatterGatherEntry *sg;
|
|
int nsg;
|
|
int nalloc;
|
|
target_phys_addr_t size;
|
|
};
|
|
|
|
void qemu_sglist_init(QEMUSGList *qsg, int alloc_hint);
|
|
void qemu_sglist_add(QEMUSGList *qsg, target_phys_addr_t base,
|
|
target_phys_addr_t len);
|
|
void qemu_sglist_destroy(QEMUSGList *qsg);
|
|
|
|
typedef BlockDriverAIOCB *DMAIOFunc(BlockDriverState *bs, int64_t sector_num,
|
|
QEMUIOVector *iov, int nb_sectors,
|
|
BlockDriverCompletionFunc *cb, void *opaque);
|
|
|
|
BlockDriverAIOCB *dma_bdrv_io(BlockDriverState *bs,
|
|
QEMUSGList *sg, uint64_t sector_num,
|
|
DMAIOFunc *io_func, BlockDriverCompletionFunc *cb,
|
|
void *opaque, int is_write);
|
|
BlockDriverAIOCB *dma_bdrv_read(BlockDriverState *bs,
|
|
QEMUSGList *sg, uint64_t sector,
|
|
BlockDriverCompletionFunc *cb, void *opaque);
|
|
BlockDriverAIOCB *dma_bdrv_write(BlockDriverState *bs,
|
|
QEMUSGList *sg, uint64_t sector,
|
|
BlockDriverCompletionFunc *cb, void *opaque);
|
|
#endif
|