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/block.h" 17 18 typedef struct { 19 hwaddr base; 20 hwaddr len; 21 } ScatterGatherEntry; 22 23 struct QEMUSGList { 24 ScatterGatherEntry *sg; 25 int nsg; 26 int nalloc; 27 hwaddr size; 28 }; 29 30 void qemu_sglist_init(QEMUSGList *qsg, int alloc_hint); 31 void qemu_sglist_add(QEMUSGList *qsg, hwaddr base, 32 hwaddr 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 42