xref: /illumos-kvm-cmd/dma.h (revision 68396ea9)
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 {
19     target_phys_addr_t base;
20     target_phys_addr_t len;
21 } ScatterGatherEntry;
22 
23 typedef struct {
24     ScatterGatherEntry *sg;
25     int nsg;
26     int nalloc;
27     target_phys_addr_t size;
28 } QEMUSGList;
29 
30 void qemu_sglist_init(QEMUSGList *qsg, int alloc_hint);
31 void qemu_sglist_add(QEMUSGList *qsg, target_phys_addr_t base,
32                      target_phys_addr_t 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