[dpdk-dev] [PATCH 10/14] vhost: vring address setup for packed queues
Jens Freimann
jfreimann at redhat.com
Mon Jan 29 15:11:39 CET 2018
From: Yuanhan Liu <yuanhan.liu at linux.intel.com>
Add code to set up packed queues when enabled.
Signed-off-by: Yuanhan Liu <yuanhan.liu at linux.intel.com>
Signed-off-by: Jens Freimann <jfreiman at redhat.com>
---
lib/librte_vhost/vhost.c | 4 ++++
lib/librte_vhost/vhost.h | 1 +
lib/librte_vhost/vhost_user.c | 17 ++++++++++++++++-
3 files changed, 21 insertions(+), 1 deletion(-)
diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c
index 1dd9adbc7..78913912c 100644
--- a/lib/librte_vhost/vhost.c
+++ b/lib/librte_vhost/vhost.c
@@ -536,6 +536,9 @@ rte_vhost_enable_guest_notification(int vid, uint16_t queue_id, int enable)
{
struct virtio_net *dev = get_device(vid);
+ if (dev->features & (1ULL << VIRTIO_F_PACKED))
+ return 0;
+
if (dev == NULL)
return -1;
@@ -545,6 +548,7 @@ rte_vhost_enable_guest_notification(int vid, uint16_t queue_id, int enable)
return -1;
}
+
dev->virtqueue[queue_id]->used->flags = VRING_USED_F_NO_NOTIFY;
return 0;
}
diff --git a/lib/librte_vhost/vhost.h b/lib/librte_vhost/vhost.h
index 152e8bce1..8554d51d8 100644
--- a/lib/librte_vhost/vhost.h
+++ b/lib/librte_vhost/vhost.h
@@ -68,6 +68,7 @@ struct batch_copy_elem {
*/
struct vhost_virtqueue {
struct vring_desc *desc;
+ struct vring_desc_1_1 *desc_1_1;
struct vring_avail *avail;
struct vring_used *used;
uint32_t size;
diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index 1dd1a61b6..979bffe1a 100644
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -414,6 +414,19 @@ translate_ring_addresses(struct virtio_net *dev, int vq_index)
struct vhost_virtqueue *vq = dev->virtqueue[vq_index];
struct vhost_vring_addr *addr = &vq->ring_addrs;
+ if (dev->features & (1ULL << VIRTIO_F_PACKED)) {
+ vq->desc_1_1 = (struct vring_desc_1_1 *) ring_addr_to_vva
+ (dev, vq, addr->desc_user_addr, sizeof(vq->desc_1_1));
+ vq->desc = NULL;
+ vq->avail = NULL;
+ vq->used = NULL;
+ vq->log_guest_addr = 0;
+
+ assert(vq->last_used_idx == 0);
+
+ return dev;
+ }
+
/* The addresses are converted from QEMU virtual to Vhost virtual. */
if (vq->desc && vq->avail && vq->used)
return dev;
@@ -426,6 +439,7 @@ translate_ring_addresses(struct virtio_net *dev, int vq_index)
dev->vid);
return dev;
}
+ vq->desc_1_1 = NULL;
dev = numa_realloc(dev, vq_index);
vq = dev->virtqueue[vq_index];
@@ -763,7 +777,8 @@ vhost_user_set_mem_table(struct virtio_net *dev, struct VhostUserMsg *pmsg)
static int
vq_is_ready(struct vhost_virtqueue *vq)
{
- return vq && vq->desc && vq->avail && vq->used &&
+ return vq &&
+ (vq->desc_1_1 || (vq->desc && vq->avail && vq->used)) &&
vq->kickfd != VIRTIO_UNINITIALIZED_EVENTFD &&
vq->callfd != VIRTIO_UNINITIALIZED_EVENTFD;
}
--
2.14.3
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