/* * 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 ScatterGatherEntry ScatterGatherEntry; #if defined(TARGET_PHYS_ADDR_BITS) typedef target_phys_addr_t dma_addr_t; #define DMA_ADDR_FMT TARGET_FMT_plx typedef enum { DMA_DIRECTION_TO_DEVICE = 0, DMA_DIRECTION_FROM_DEVICE = 1, } DMADirection; struct ScatterGatherEntry { dma_addr_t base; dma_addr_t len; }; struct QEMUSGList { ScatterGatherEntry *sg; int nsg; int nalloc; dma_addr_t size; }; void qemu_sglist_init(QEMUSGList *qsg, int alloc_hint); void qemu_sglist_add(QEMUSGList *qsg, dma_addr_t base, dma_addr_t len); void qemu_sglist_destroy(QEMUSGList *qsg); #endif 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, bool to_dev); 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