diff options
| author | Vincenzo Maffione <vmaffione@FreeBSD.org> | 2020-06-03 17:42:17 +0000 |
|---|---|---|
| committer | Vincenzo Maffione <vmaffione@FreeBSD.org> | 2020-06-03 17:42:17 +0000 |
| commit | 2d769e25b1d525edcf747c2058ce2b7c9e6c6699 (patch) | |
| tree | c3940b93b51224ca48f5d04fc250554ba63816f5 /sys/dev/virtio | |
| parent | 78a3645fd239a1be33fc181bd28d5b52df54e4f0 (diff) | |
| download | src-2d769e25b1d525edcf747c2058ce2b7c9e6c6699.tar.gz src-2d769e25b1d525edcf747c2058ce2b7c9e6c6699.zip | |
netmap: vtnet: add vtnrx_nm_refill index to receive queues
The new index tracks the next netmap slot that is going
to be enqueued into the virtqueue. The index is necessary
to prevent the receive VQ and the netmap rx ring from going
out of sync, considering that we never enqueue N slots, but
at most N-1. This change fixes a bug that causes the VQ
and the netmap ring to go out of sync after N-1 packets
have been received.
MFC after: 1 week
Notes
Notes:
svn path=/head/; revision=361758
Diffstat (limited to 'sys/dev/virtio')
| -rw-r--r-- | sys/dev/virtio/network/if_vtnetvar.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sys/dev/virtio/network/if_vtnetvar.h b/sys/dev/virtio/network/if_vtnetvar.h index 69340c0ec65e..e2e1f3362360 100644 --- a/sys/dev/virtio/network/if_vtnetvar.h +++ b/sys/dev/virtio/network/if_vtnetvar.h @@ -80,6 +80,7 @@ struct vtnet_rxq { struct taskqueue *vtnrx_tq; struct task vtnrx_intrtask; #ifdef DEV_NETMAP + uint32_t vtnrx_nm_refill; struct virtio_net_hdr_mrg_rxbuf vtnrx_shrhdr; #endif /* DEV_NETMAP */ char vtnrx_name[16]; |