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authoraliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162>2009-02-05 21:23:58 +0000
committeraliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162>2009-02-05 21:23:58 +0000
commit59a703ebaa9cb5aeda986dc8f627b8d23e3297cd (patch)
tree409d817d5e499297da04543b88823c7fcd6a3c04 /dma.h
parentbe959463afd3e257611d6b6ab98d24c0c94d4e3d (diff)
Introduce block dma helpers (Avi Kivity)
These helpers perform read/write requests on entire scatter/gather lists, relieving the device emulation code from mapping and unmapping physical memory, and from looping when map resources are exhausted. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6524 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'dma.h')
-rw-r--r--dma.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/dma.h b/dma.h
index 16af50f1f..d596717f1 100644
--- a/dma.h
+++ b/dma.h
@@ -12,6 +12,7 @@
#include <stdio.h>
#include "cpu.h"
+#include "block.h"
typedef struct {
target_phys_addr_t base;
@@ -30,4 +31,11 @@ void qemu_sglist_add(QEMUSGList *qsg, target_phys_addr_t base,
target_phys_addr_t len);
void qemu_sglist_destroy(QEMUSGList *qsg);
+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