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[RFC PATCH 2/9] vdpa: Extract get geatures part from vhost_vdpa_get_max_
From: |
Eugenio Pérez |
Subject: |
[RFC PATCH 2/9] vdpa: Extract get geatures part from vhost_vdpa_get_max_queue_pairs |
Date: |
Mon, 14 Feb 2022 20:16:28 +0100 |
To know the device features is also needed for CVQ SVQ. Extract from
vhost_vdpa_get_max_queue_pairs so we can reuse it.
Report errno in case of failure getting them while we're at it.
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
---
net/vhost-vdpa.c | 30 ++++++++++++++++++++----------
1 file changed, 20 insertions(+), 10 deletions(-)
diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
index 420614d590..fc844a7ce6 100644
--- a/net/vhost-vdpa.c
+++ b/net/vhost-vdpa.c
@@ -241,20 +241,24 @@ static NetClientState *net_vhost_vdpa_init(NetClientState
*peer,
return nc;
}
-static int vhost_vdpa_get_max_queue_pairs(int fd, int *has_cvq, Error **errp)
+static int vhost_vdpa_get_features(int fd, uint64_t *features, Error **errp)
+{
+ int ret = ioctl(fd, VHOST_GET_FEATURES, features);
+ if (ret) {
+ error_setg_errno(errp, errno,
+ "Fail to query features from vhost-vDPA device");
+ }
+ return ret;
+}
+
+static int vhost_vdpa_get_max_queue_pairs(int fd, uint64_t features,
+ int *has_cvq, Error **errp)
{
unsigned long config_size = offsetof(struct vhost_vdpa_config, buf);
g_autofree struct vhost_vdpa_config *config = NULL;
__virtio16 *max_queue_pairs;
- uint64_t features;
int ret;
- ret = ioctl(fd, VHOST_GET_FEATURES, &features);
- if (ret) {
- error_setg(errp, "Fail to query features from vhost-vDPA device");
- return ret;
- }
-
if (features & (1 << VIRTIO_NET_F_CTRL_VQ)) {
*has_cvq = 1;
} else {
@@ -285,10 +289,11 @@ int net_init_vhost_vdpa(const Netdev *netdev, const char
*name,
NetClientState *peer, Error **errp)
{
const NetdevVhostVDPAOptions *opts;
+ uint64_t features;
int vdpa_device_fd;
g_autofree NetClientState **ncs = NULL;
NetClientState *nc;
- int queue_pairs, i, has_cvq = 0;
+ int queue_pairs, r, i, has_cvq = 0;
g_autoptr(VhostIOVATree) iova_tree = NULL;
struct vhost_vdpa_iova_range iova_range;
@@ -304,7 +309,12 @@ int net_init_vhost_vdpa(const Netdev *netdev, const char
*name,
return -errno;
}
- queue_pairs = vhost_vdpa_get_max_queue_pairs(vdpa_device_fd,
+ r = vhost_vdpa_get_features(vdpa_device_fd, &features, errp);
+ if (r) {
+ return r;
+ }
+
+ queue_pairs = vhost_vdpa_get_max_queue_pairs(vdpa_device_fd, features,
&has_cvq, errp);
if (queue_pairs < 0) {
qemu_close(vdpa_device_fd);
--
2.27.0
- [RFC PATCH 0/9] Net Control VQ support in vDPA SVQ, Eugenio Pérez, 2022/02/14
- [RFC PATCH 1/9] virtio-net: Expose ctrl virtqueue logic, Eugenio Pérez, 2022/02/14
- [RFC PATCH 2/9] vdpa: Extract get geatures part from vhost_vdpa_get_max_queue_pairs,
Eugenio Pérez <=
- [RFC PATCH 3/9] virtio: Make virtqueue_alloc_element non-static, Eugenio Pérez, 2022/02/14
- [RFC PATCH 4/9] vhost: Add SVQElement, Eugenio Pérez, 2022/02/14
- [RFC PATCH 5/9] vhost: Add custom used buffer callback, Eugenio Pérez, 2022/02/14
- [RFC PATCH 6/9] vdpa: Add map/unmap operation callback to SVQ, Eugenio Pérez, 2022/02/14
- [RFC PATCH 7/9] vhost: Add vhost_svq_inject, Eugenio Pérez, 2022/02/14
- [RFC PATCH 8/9] vhost: Add vhost_svq_start_op, Eugenio Pérez, 2022/02/14
- [RFC PATCH 9/9] vdpa: control virtqueue support on shadow virtqueue, Eugenio Pérez, 2022/02/14
- Re: [RFC PATCH 0/9] Net Control VQ support in vDPA SVQ, Eugenio Perez Martin, 2022/02/15