LXR qemu/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 "block.h"
  16
  17typedef struct {
  18    target_phys_addr_t base;
  19    target_phys_addr_t len;
  20} ScatterGatherEntry;
  21
  22typedef struct {
  23    ScatterGatherEntry *sg;
  24    int nsg;
  25    int nalloc;
  26    target_phys_addr_t size;
  27} QEMUSGList;
  28
  29void qemu_sglist_init(QEMUSGList *qsg, int alloc_hint);
  30void qemu_sglist_add(QEMUSGList *qsg, target_phys_addr_t base,
  31                     target_phys_addr_t len);
  32void qemu_sglist_destroy(QEMUSGList *qsg);
  33
  34BlockDriverAIOCB *dma_bdrv_read(BlockDriverState *bs,
  35                                QEMUSGList *sg, uint64_t sector,
  36                                BlockDriverCompletionFunc *cb, void *opaque);
  37BlockDriverAIOCB *dma_bdrv_write(BlockDriverState *bs,
  38                                 QEMUSGList *sg, uint64_t sector,
  39                                 BlockDriverCompletionFunc *cb, void *opaque);
  40
  41#endif
  42