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vringh: define the stride used for translation

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Define a macro to be reused in the different parts of the code.

Useful for the next patches where we add more arrays to manage also
translations with user VA.

Suggested-by: Eugenio Perez Martin <eperezma@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Message-Id: <20230404131326.44403-5-sgarzare@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Stefano Garzarella 2023-04-04 15:13:21 +02:00 committed by Michael S. Tsirkin
parent c037178250
commit f609d6cbb3
1 changed files with 4 additions and 2 deletions
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6
drivers/vhost/vringh.c
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@ -1141,13 +1141,15 @@ static int iotlb_translate(const struct vringh *vrh,
return ret;
}
#define IOTLB_IOV_STRIDE 16
static inline int copy_from_iotlb(const struct vringh *vrh, void *dst,
void *src, size_t len)
{
u64 total_translated = 0;
while (total_translated < len) {
struct bio_vec iov[16];
struct bio_vec iov[IOTLB_IOV_STRIDE];
struct iov_iter iter;
u64 translated;
int ret;
@ -1180,7 +1182,7 @@ static inline int copy_to_iotlb(const struct vringh *vrh, void *dst,
u64 total_translated = 0;
while (total_translated < len) {
struct bio_vec iov[16];
struct bio_vec iov[IOTLB_IOV_STRIDE];
struct iov_iter iter;
u64 translated;
int ret;