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[RFC PATCH v6 14/23] vdpa: control virtqueue support on shadow virtqueue
From: |
Eugenio Pérez |
Subject: |
[RFC PATCH v6 14/23] vdpa: control virtqueue support on shadow virtqueue |
Date: |
Mon, 11 Apr 2022 16:50:17 +0200 |
Introduce the control virtqueue support for vDPA shadow virtqueue. This
is needed for advanced networking features like multiqueue.
To demonstrate command handling, VIRTIO_NET_F_CTRL_MACADDR and
VIRTIO_NET_CTRL_MQ are implemented. If vDPA device is started with SVQ
support and virtio-net driver changes MAC or the number of queues
virtio-net device model will be updated with the new one.
Others cvq commands could be added here straightforwardly but they have
been not tested.
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
---
net/vhost-vdpa.c | 80 ++++++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 77 insertions(+), 3 deletions(-)
diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
index 290aa01e13..a83da4616c 100644
--- a/net/vhost-vdpa.c
+++ b/net/vhost-vdpa.c
@@ -11,6 +11,7 @@
#include "qemu/osdep.h"
#include "clients.h"
+#include "hw/virtio/virtio-net.h"
#include "net/vhost_net.h"
#include "net/vhost-vdpa.h"
#include "hw/virtio/vhost-vdpa.h"
@@ -69,6 +70,30 @@ const int vdpa_feature_bits[] = {
VHOST_INVALID_FEATURE_BIT
};
+/** Supported device specific feature bits with SVQ */
+static const uint64_t vdpa_svq_device_features =
+ BIT_ULL(VIRTIO_NET_F_CSUM) |
+ BIT_ULL(VIRTIO_NET_F_GUEST_CSUM) |
+ BIT_ULL(VIRTIO_NET_F_CTRL_GUEST_OFFLOADS) |
+ BIT_ULL(VIRTIO_NET_F_MTU) |
+ BIT_ULL(VIRTIO_NET_F_MAC) |
+ BIT_ULL(VIRTIO_NET_F_GUEST_TSO4) |
+ BIT_ULL(VIRTIO_NET_F_GUEST_TSO6) |
+ BIT_ULL(VIRTIO_NET_F_GUEST_ECN) |
+ BIT_ULL(VIRTIO_NET_F_GUEST_UFO) |
+ BIT_ULL(VIRTIO_NET_F_HOST_TSO4) |
+ BIT_ULL(VIRTIO_NET_F_HOST_TSO6) |
+ BIT_ULL(VIRTIO_NET_F_HOST_ECN) |
+ BIT_ULL(VIRTIO_NET_F_HOST_UFO) |
+ BIT_ULL(VIRTIO_NET_F_MRG_RXBUF) |
+ BIT_ULL(VIRTIO_NET_F_STATUS) |
+ BIT_ULL(VIRTIO_NET_F_CTRL_VQ) |
+ BIT_ULL(VIRTIO_NET_F_MQ) |
+ BIT_ULL(VIRTIO_F_ANY_LAYOUT) |
+ BIT_ULL(VIRTIO_NET_F_CTRL_MAC_ADDR) |
+ BIT_ULL(VIRTIO_NET_F_RSC_EXT) |
+ BIT_ULL(VIRTIO_NET_F_STANDBY);
+
VHostNetState *vhost_vdpa_get_vhost_net(NetClientState *nc)
{
VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc);
@@ -199,6 +224,46 @@ static int vhost_vdpa_get_iova_range(int fd,
return ret < 0 ? -errno : 0;
}
+static void vhost_vdpa_net_handle_ctrl(VirtIODevice *vdev,
+ const VirtQueueElement *elem)
+{
+ struct virtio_net_ctrl_hdr ctrl;
+ virtio_net_ctrl_ack status = VIRTIO_NET_ERR;
+ size_t s;
+ struct iovec in = {
+ .iov_base = &status,
+ .iov_len = sizeof(status),
+ };
+
+ s = iov_to_buf(elem->out_sg, elem->out_num, 0, &ctrl, sizeof(ctrl.class));
+ if (s != sizeof(ctrl.class)) {
+ return;
+ }
+
+ switch (ctrl.class) {
+ case VIRTIO_NET_CTRL_MAC_ADDR_SET:
+ case VIRTIO_NET_CTRL_MQ:
+ break;
+ default:
+ return;
+ };
+
+ s = iov_to_buf(elem->in_sg, elem->in_num, 0, &status, sizeof(status));
+ if (s != sizeof(status) || status != VIRTIO_NET_OK) {
+ return;
+ }
+
+ status = VIRTIO_NET_ERR;
+ virtio_net_handle_ctrl_iov(vdev, &in, 1, elem->out_sg, elem->out_num);
+ if (status != VIRTIO_NET_OK) {
+ error_report("Bad CVQ processing in model");
+ }
+}
+
+static const VhostShadowVirtqueueOps vhost_vdpa_net_svq_ops = {
+ .used_elem_handler = vhost_vdpa_net_handle_ctrl,
+};
+
static NetClientState *net_vhost_vdpa_init(NetClientState *peer,
const char *device,
const char *name,
@@ -226,6 +291,9 @@ static NetClientState *net_vhost_vdpa_init(NetClientState
*peer,
s->vhost_vdpa.device_fd = vdpa_device_fd;
s->vhost_vdpa.index = queue_pair_index;
s->vhost_vdpa.shadow_vqs_enabled = svq;
+ if (!is_datapath) {
+ s->vhost_vdpa.shadow_vq_ops = &vhost_vdpa_net_svq_ops;
+ }
s->vhost_vdpa.iova_tree = iova_tree;
ret = vhost_vdpa_add(nc, (void *)&s->vhost_vdpa, queue_pair_index, nvqs);
if (ret) {
@@ -314,9 +382,15 @@ int net_init_vhost_vdpa(const Netdev *netdev, const char
*name,
}
if (opts->x_svq) {
struct vhost_vdpa_iova_range iova_range;
-
- if (has_cvq) {
- error_setg(errp, "vdpa svq does not work with cvq");
+ uint64_t invalid_dev_features =
+ features & ~vdpa_svq_device_features &
+ /* Transport are all accepted at this point */
+ ~MAKE_64BIT_MASK(VIRTIO_TRANSPORT_F_START,
+ VIRTIO_TRANSPORT_F_END -
VIRTIO_TRANSPORT_F_START);
+
+ if (invalid_dev_features) {
+ error_setg(errp, "vdpa svq does not work with features 0x%" PRIx64,
+ invalid_dev_features);
goto err_svq;
}
vhost_vdpa_get_iova_range(vdpa_device_fd, &iova_range);
--
2.27.0
- [RFC PATCH v6 05/23] vhost: Fix bad return of descriptors to SVQ, (continued)
- [RFC PATCH v6 05/23] vhost: Fix bad return of descriptors to SVQ, Eugenio Pérez, 2022/04/11
- [RFC PATCH v6 04/23] hw/virtio: Replace g_memdup() by g_memdup2(), Eugenio Pérez, 2022/04/11
- [RFC PATCH v6 02/23] vdpa: Fix bad index calculus at vhost_vdpa_get_vring_base, Eugenio Pérez, 2022/04/11
- [RFC PATCH v6 06/23] vdpa: Add x-svq to NetdevVhostVDPAOptions, Eugenio Pérez, 2022/04/11
- [RFC PATCH v6 07/23] vhost: move descriptor translation to vhost_svq_vring_write_descs, Eugenio Pérez, 2022/04/11
- [RFC PATCH v6 09/23] virtio-net: Expose ctrl virtqueue logic, Eugenio Pérez, 2022/04/11
- [RFC PATCH v6 11/23] virtio: Make virtqueue_alloc_element non-static, Eugenio Pérez, 2022/04/11
- [RFC PATCH v6 10/23] vdpa: Extract get features part from vhost_vdpa_get_max_queue_pairs, Eugenio Pérez, 2022/04/11
- [RFC PATCH v6 13/23] vhost: Add custom used buffer callback, Eugenio Pérez, 2022/04/11
- [RFC PATCH v6 08/23] vdpa: Fix index calculus at vhost_vdpa_svqs_start, Eugenio Pérez, 2022/04/11
- [RFC PATCH v6 14/23] vdpa: control virtqueue support on shadow virtqueue,
Eugenio Pérez <=
- [RFC PATCH v6 15/23] vhost: Add vhost_iova_tree_find, Eugenio Pérez, 2022/04/11
- [RFC PATCH v6 18/23] vdpa: add NetClientState->start() callback, Eugenio Pérez, 2022/04/11
- [RFC PATCH v6 12/23] vhost: Add SVQElement, Eugenio Pérez, 2022/04/11
- [RFC PATCH v6 21/23] vhost: Make possible to check for device exclusive vq group, Eugenio Pérez, 2022/04/11
- [RFC PATCH v6 19/23] vdpa: Add vhost_vdpa_start_control_svq, Eugenio Pérez, 2022/04/11
- [RFC PATCH v6 16/23] vdpa: Add map/unmap operation callback to SVQ, Eugenio Pérez, 2022/04/11
- [RFC PATCH v6 23/23] vdpa: Add x-cvq-svq, Eugenio Pérez, 2022/04/11
- [RFC PATCH v6 17/23] vhost: Add vhost_svq_inject, Eugenio Pérez, 2022/04/11
- [RFC PATCH v6 20/23] vhost: Update kernel headers, Eugenio Pérez, 2022/04/11
- [RFC PATCH v6 22/23] vdpa: Add asid attribute to vdpa device, Eugenio Pérez, 2022/04/11