From: Jens Freimann <jfreimann@redhat.com>
To: dev@dpdk.org
Cc: tiwei.bie@intel.com, yliu@fridaylinux.org,
maxime.coquelin@redhat.com, mst@redhat.com
Subject: [dpdk-dev] [PATCH 11/14] vhost: add helpers for packed virtqueues
Date: Mon, 29 Jan 2018 15:11:40 +0100 [thread overview]
Message-ID: <20180129141143.13437-12-jfreimann@redhat.com> (raw)
In-Reply-To: <20180129141143.13437-1-jfreimann@redhat.com>
Add some helper functions to set/check descriptor flags
and toggle the used wrap counter.
Signed-off-by: Jens Freimann <jfreimann@redhat.com>
---
lib/librte_vhost/virtio-1.1.h | 43 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 43 insertions(+)
diff --git a/lib/librte_vhost/virtio-1.1.h b/lib/librte_vhost/virtio-1.1.h
index 5ca0bc33f..84039797e 100644
--- a/lib/librte_vhost/virtio-1.1.h
+++ b/lib/librte_vhost/virtio-1.1.h
@@ -17,4 +17,47 @@ struct vring_desc_1_1 {
uint16_t flags;
};
+static inline void
+toggle_wrap_counter(struct vhost_virtqueue *vq)
+{
+ vq->used_wrap_counter ^= 1;
+}
+
+static inline int
+desc_is_avail(struct vhost_virtqueue *vq, struct vring_desc_1_1 *desc)
+{
+ if (!vq)
+ return -1;
+
+ if (vq->used_wrap_counter == 1)
+ if ((desc->flags & DESC_AVAIL) && !(desc->flags & DESC_USED))
+ return 1;
+ if (vq->used_wrap_counter == 0)
+ if (!(desc->flags & DESC_AVAIL) && (desc->flags & DESC_USED))
+ return 1;
+ return 0;
+}
+
+static inline void
+_set_desc_used(struct vring_desc_1_1 *desc, int wrap_counter)
+{
+ uint16_t flags = desc->flags;
+
+ if (wrap_counter == 1) {
+ flags |= DESC_USED;
+ flags |= DESC_AVAIL;
+ } else {
+ flags &= ~DESC_USED;
+ flags &= ~DESC_AVAIL;
+ }
+
+ desc->flags = flags;
+}
+
+static inline void
+set_desc_used(struct vhost_virtqueue *vq, struct vring_desc_1_1 *desc)
+{
+ _set_desc_used(desc, vq->used_wrap_counter);
+}
+
#endif /* __VIRTIO_1_1_H */
--
2.14.3
next prev parent reply other threads:[~2018-01-29 14:13 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-29 14:11 [dpdk-dev] [PATCH 00/14] implement " Jens Freimann
2018-01-29 14:11 ` [dpdk-dev] [PATCH 01/14] net/virtio: vring init for packed queues Jens Freimann
2018-01-29 14:11 ` [dpdk-dev] [PATCH 02/14] net/virtio: don't call virtio_disable_intr() " Jens Freimann
2018-01-29 14:11 ` [dpdk-dev] [PATCH 03/14] net/virtio: add virtio 1.1 defines Jens Freimann
2018-01-29 14:11 ` [dpdk-dev] [PATCH 04/14] net/virtio: add packed virtqueue helpers Jens Freimann
2018-01-29 14:11 ` [dpdk-dev] [PATCH 05/14] net/virtio: don't dump split virtqueue data Jens Freimann
2018-01-29 14:11 ` [dpdk-dev] [PATCH 06/14] net/virtio-user: add option to use packed queues Jens Freimann
2018-01-29 14:11 ` [dpdk-dev] [PATCH 07/14] net/virtio: implement transmit path for " Jens Freimann
2018-02-12 13:16 ` Jason Wang
2018-02-13 9:10 ` Jens Freimann
2018-01-29 14:11 ` [dpdk-dev] [PATCH 08/14] net/virtio: implement receive " Jens Freimann
2018-01-29 14:11 ` [dpdk-dev] [PATCH 09/14] vhost: add virtio 1.1 defines Jens Freimann
2018-01-29 14:24 ` Yuanhan Liu
2018-01-29 14:28 ` Jens Freimann
2018-01-29 14:11 ` [dpdk-dev] [PATCH 10/14] vhost: vring address setup for packed queues Jens Freimann
2018-02-01 9:16 ` Maxime Coquelin
2018-01-29 14:11 ` Jens Freimann [this message]
2018-02-01 9:20 ` [dpdk-dev] [PATCH 11/14] vhost: add helpers for packed virtqueues Maxime Coquelin
2018-01-29 14:11 ` [dpdk-dev] [PATCH 12/14] vhost: dequeue for packed queues Jens Freimann
2018-02-01 9:35 ` Maxime Coquelin
2018-02-01 10:23 ` Jens Freimann
2018-01-29 14:11 ` [dpdk-dev] [PATCH 13/14] vhost: packed queue enqueue path Jens Freimann
2018-01-29 14:11 ` [dpdk-dev] [PATCH 14/14] vhost: enable packed virtqueues Jens Freimann
2018-01-30 10:45 ` Jens Freimann
2018-02-06 6:20 ` [dpdk-dev] [PATCH 00/14] implement " Jason Wang
2018-02-06 13:58 ` Jens Freimann
2018-02-07 8:37 ` Jason Wang
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