diff options
Diffstat (limited to 'hw/virtio.c')
| -rw-r--r-- | hw/virtio.c | 28 |
1 files changed, 21 insertions, 7 deletions
diff --git a/hw/virtio.c b/hw/virtio.c index cfad363..6821092 100644 --- a/hw/virtio.c +++ b/hw/virtio.c @@ -335,7 +335,8 @@ static unsigned virtqueue_next_desc(target_phys_addr_t desc_pa, return next; } -int virtqueue_avail_bytes(VirtQueue *vq, int in_bytes, int out_bytes) +void virtqueue_get_avail_bytes(VirtQueue *vq, unsigned int *in_bytes, + unsigned int *out_bytes) { unsigned int idx; unsigned int total_bufs, in_total, out_total; @@ -380,13 +381,9 @@ int virtqueue_avail_bytes(VirtQueue *vq, int in_bytes, int out_bytes) } if (vring_desc_flags(desc_pa, i) & VRING_DESC_F_WRITE) { - if (in_bytes > 0 && - (in_total += vring_desc_len(desc_pa, i)) >= in_bytes) - return 1; + in_total += vring_desc_len(desc_pa, i); } else { - if (out_bytes > 0 && - (out_total += vring_desc_len(desc_pa, i)) >= out_bytes) - return 1; + out_total += vring_desc_len(desc_pa, i); } } while ((i = virtqueue_next_desc(desc_pa, i, max)) != max); @@ -395,7 +392,24 @@ int virtqueue_avail_bytes(VirtQueue *vq, int in_bytes, int out_bytes) else total_bufs++; } + if (in_bytes) { + *in_bytes = in_total; + } + if (out_bytes) { + *out_bytes = out_total; + } +} +int virtqueue_avail_bytes(VirtQueue *vq, unsigned int in_bytes, + unsigned int out_bytes) +{ + unsigned int in_total, out_total; + + virtqueue_get_avail_bytes(vq, &in_total, &out_total); + if ((in_bytes && in_bytes < in_total) + || (out_bytes && out_bytes < out_total)) { + return 1; + } return 0; } |