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ide: Switch to byte-based aio block access

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Sector-based blk_aio_readv() and blk_aio_writev() should die; switch
to byte-based blk_aio_preadv() and blk_aio_pwritev() instead.

The patch had to touch multiple files at once, because dma_blk_io()
takes pointers to the functions, and ide_issue_trim() piggybacks on
the same interface (while ignoring offset under the hood).

Signed-off-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Eric Blake 2016-05-06 10:26:31 -06:00 • committed by Kevin Wolf
parent 60cb2fa7eb
commit d4f510eb3f
5 changed files with 18 additions and 21 deletions
Download patch file Download diff file Expand all files Collapse all files

10
hw/ide/core.c
View file

@ -442,7 +442,7 @@ static void ide_issue_trim_cb(void *opaque, int ret)
}
BlockAIOCB *ide_issue_trim(BlockBackend *blk,
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
int64_t offset, QEMUIOVector *qiov, BdrvRequestFlags flags,
BlockCompletionFunc *cb, void *opaque)
{
TrimAIOCB *iocb;
@ -616,8 +616,8 @@ BlockAIOCB *ide_buffered_readv(IDEState *s, int64_t sector_num,
req->iov.iov_len = iov->size;
qemu_iovec_init_external(&req->qiov, &req->iov, 1);
aioreq = blk_aio_readv(s->blk, sector_num, &req->qiov, nb_sectors,
ide_buffered_readv_cb, req);
aioreq = blk_aio_preadv(s->blk, sector_num << BDRV_SECTOR_BITS,
&req->qiov, 0, ide_buffered_readv_cb, req);
QLIST_INSERT_HEAD(&s->buffered_requests, req, list);
return aioreq;
@ -1006,8 +1006,8 @@ static void ide_sector_write(IDEState *s)
block_acct_start(blk_get_stats(s->blk), &s->acct,
n * BDRV_SECTOR_SIZE, BLOCK_ACCT_WRITE);
s->pio_aiocb = blk_aio_writev(s->blk, sector_num, &s->qiov, n,
ide_sector_write_cb, s);
s->pio_aiocb = blk_aio_pwritev(s->blk, sector_num << BDRV_SECTOR_BITS,
&s->qiov, 0, ide_sector_write_cb, s);
}
static void ide_flush_cb(void *opaque, int ret)

2
hw/ide/internal.h
View file

@ -614,7 +614,7 @@ void ide_transfer_start(IDEState *s, uint8_t *buf, int size,
void ide_transfer_stop(IDEState *s);
void ide_set_inactive(IDEState *s, bool more);
BlockAIOCB *ide_issue_trim(BlockBackend *blk,
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
int64_t offset, QEMUIOVector *qiov, BdrvRequestFlags flags,
BlockCompletionFunc *cb, void *opaque);
BlockAIOCB *ide_buffered_readv(IDEState *s, int64_t sector_num,
QEMUIOVector *iov, int nb_sectors,

9
hw/ide/macio.c
View file

@ -120,8 +120,7 @@ static void pmac_dma_read(BlockBackend *blk,
MACIO_DPRINTF("--- Block read transfer - sector_num: %" PRIx64 " "
"nsector: %x\n", (offset >> 9), (bytes >> 9));
s->bus->dma->aiocb = blk_aio_readv(blk, (offset >> 9), &io->iov,
(bytes >> 9), cb, io);
s->bus->dma->aiocb = blk_aio_preadv(blk, offset, &io->iov, 0, cb, io);
}
static void pmac_dma_write(BlockBackend *blk,
@ -205,8 +204,7 @@ static void pmac_dma_write(BlockBackend *blk,
MACIO_DPRINTF("--- Block write transfer - sector_num: %" PRIx64 " "
"nsector: %x\n", (offset >> 9), (bytes >> 9));
s->bus->dma->aiocb = blk_aio_writev(blk, (offset >> 9), &io->iov,
(bytes >> 9), cb, io);
s->bus->dma->aiocb = blk_aio_pwritev(blk, offset, &io->iov, 0, cb, io);
}
static void pmac_dma_trim(BlockBackend *blk,
@ -232,8 +230,7 @@ static void pmac_dma_trim(BlockBackend *blk,
s->io_buffer_index += io->len;
io->len = 0;
s->bus->dma->aiocb = ide_issue_trim(blk, (offset >> 9), &io->iov,
(bytes >> 9), cb, io);
s->bus->dma->aiocb = ide_issue_trim(blk, offset, &io->iov, 0, cb, io);
}
static void pmac_ide_atapi_transfer_cb(void *opaque, int ret)