Author: bryanv
Date: Thu Jan 1 02:06:00 2015
New Revision: 276491
URL: https://svnweb.freebsd.org/changeset/base/276491
Log:
Add softc flag for when the indirect descriptor feature was negotiated
MFC after: 2 weeks
Modified:
head/sys/dev/virtio/network/if_vtnet.c
head/sys/dev/virtio/network/if_vtnetvar.h
Modified: head/sys/dev/virtio/network/if_vtnet.c
==============================================================================
--- head/sys/dev/virtio/network/if_vtnet.c Thu Jan 1 02:04:44 2015
(r276490)
+++ head/sys/dev/virtio/network/if_vtnet.c Thu Jan 1 02:06:00 2015
(r276491)
@@ -599,6 +599,8 @@ vtnet_setup_features(struct vtnet_softc
vtnet_negotiate_features(sc);
+ if (virtio_with_feature(dev, VIRTIO_RING_F_INDIRECT_DESC))
+ sc->vtnet_flags |= VTNET_FLAG_INDIRECT;
if (virtio_with_feature(dev, VIRTIO_RING_F_EVENT_IDX))
sc->vtnet_flags |= VTNET_FLAG_EVENT_IDX;
@@ -3653,7 +3655,7 @@ vtnet_set_tx_intr_threshold(struct vtnet
* Without indirect descriptors, leave enough room for the most
* segments we handle.
*/
- if (virtio_with_feature(dev, VIRTIO_RING_F_INDIRECT_DESC) == 0 &&
+ if ((sc->vtnet_flags & VTNET_FLAG_INDIRECT) == 0 &&
thresh < sc->vtnet_tx_nsegs)
thresh = sc->vtnet_tx_nsegs;
Modified: head/sys/dev/virtio/network/if_vtnetvar.h
==============================================================================
--- head/sys/dev/virtio/network/if_vtnetvar.h Thu Jan 1 02:04:44 2015
(r276490)
+++ head/sys/dev/virtio/network/if_vtnetvar.h Thu Jan 1 02:06:00 2015
(r276491)
@@ -140,7 +140,8 @@ struct vtnet_softc {
#define VTNET_FLAG_MRG_RXBUFS 0x0080
#define VTNET_FLAG_LRO_NOMRG 0x0100
#define VTNET_FLAG_MULTIQ 0x0200
-#define VTNET_FLAG_EVENT_IDX 0x0400
+#define VTNET_FLAG_INDIRECT 0x0400
+#define VTNET_FLAG_EVENT_IDX 0x0800
int vtnet_link_active;
int vtnet_hdr_size;
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