diff options
| author | Christoph Hellwig <hch@lst.de> | 2011-05-19 10:57:59 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2011-06-15 14:36:16 +0200 |
| commit | cb144ccb2ffdb3bca4026455074e434d8db34d73 (patch) | |
| tree | 550622a24052ea59e64e3efd7486201b29956af9 | |
| parent | 0754f9ecef98ad95442f16657df9721dd5682c3a (diff) | |
make dma_bdrv_io available to drivers
Make dma_bdrv_io available for drivers, and pass an explicit I/O function
instead of hardcoding bdrv_aio_readv/bdrv_aio_writev. This is required
to implement non-READ/WRITE dma commands in the ide driver, e.g. the
upcoming TRIM support.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
| -rw-r--r-- | dma-helpers.c | 23 | ||||
| -rw-r--r-- | dma.h | 8 |
2 files changed, 18 insertions, 13 deletions
diff --git a/dma-helpers.c b/dma-helpers.c index 712ed897f3..ba7f897d42 100644 --- a/dma-helpers.c +++ b/dma-helpers.c @@ -47,6 +47,7 @@ typedef struct { target_phys_addr_t sg_cur_byte; QEMUIOVector iov; QEMUBH *bh; + DMAIOFunc *io_func; } DMAAIOCB; static void dma_bdrv_cb(void *opaque, int ret); @@ -116,13 +117,8 @@ static void dma_bdrv_cb(void *opaque, int ret) return; } - if (dbs->is_write) { - dbs->acb = bdrv_aio_writev(dbs->bs, dbs->sector_num, &dbs->iov, - dbs->iov.size / 512, dma_bdrv_cb, dbs); - } else { - dbs->acb = bdrv_aio_readv(dbs->bs, dbs->sector_num, &dbs->iov, - dbs->iov.size / 512, dma_bdrv_cb, dbs); - } + dbs->acb = dbs->io_func(dbs->bs, dbs->sector_num, &dbs->iov, + dbs->iov.size / 512, dma_bdrv_cb, dbs); if (!dbs->acb) { dma_bdrv_unmap(dbs); qemu_iovec_destroy(&dbs->iov); @@ -144,12 +140,12 @@ static AIOPool dma_aio_pool = { .cancel = dma_aio_cancel, }; -static BlockDriverAIOCB *dma_bdrv_io( +BlockDriverAIOCB *dma_bdrv_io( BlockDriverState *bs, QEMUSGList *sg, uint64_t sector_num, - BlockDriverCompletionFunc *cb, void *opaque, - int is_write) + DMAIOFunc *io_func, BlockDriverCompletionFunc *cb, + void *opaque, int is_write) { - DMAAIOCB *dbs = qemu_aio_get(&dma_aio_pool, bs, cb, opaque); + DMAAIOCB *dbs = qemu_aio_get(&dma_aio_pool, bs, cb, opaque); dbs->acb = NULL; dbs->bs = bs; @@ -158,6 +154,7 @@ static BlockDriverAIOCB *dma_bdrv_io( dbs->sg_cur_index = 0; dbs->sg_cur_byte = 0; dbs->is_write = is_write; + dbs->io_func = io_func; dbs->bh = NULL; qemu_iovec_init(&dbs->iov, sg->nsg); dma_bdrv_cb(dbs, 0); @@ -173,12 +170,12 @@ BlockDriverAIOCB *dma_bdrv_read(BlockDriverState *bs, QEMUSGList *sg, uint64_t sector, void (*cb)(void *opaque, int ret), void *opaque) { - return dma_bdrv_io(bs, sg, sector, cb, opaque, 0); + return dma_bdrv_io(bs, sg, sector, bdrv_aio_readv, cb, opaque, 0); } BlockDriverAIOCB *dma_bdrv_write(BlockDriverState *bs, QEMUSGList *sg, uint64_t sector, void (*cb)(void *opaque, int ret), void *opaque) { - return dma_bdrv_io(bs, sg, sector, cb, opaque, 1); + return dma_bdrv_io(bs, sg, sector, bdrv_aio_writev, cb, opaque, 1); } @@ -32,6 +32,14 @@ void qemu_sglist_add(QEMUSGList *qsg, target_phys_addr_t base, target_phys_addr_t len); void qemu_sglist_destroy(QEMUSGList *qsg); +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, int is_write); BlockDriverAIOCB *dma_bdrv_read(BlockDriverState *bs, QEMUSGList *sg, uint64_t sector, BlockDriverCompletionFunc *cb, void *opaque); |