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12#include "qemu/osdep.h"
13#include "clients.h"
14#include "net/vhost_net.h"
15#include "net/vhost-vdpa.h"
16#include "hw/virtio/vhost-vdpa.h"
17#include "qemu/config-file.h"
18#include "qemu/error-report.h"
19#include "qemu/option.h"
20#include "qapi/error.h"
21#include <sys/ioctl.h>
22#include <err.h>
23#include "standard-headers/linux/virtio_net.h"
24#include "monitor/monitor.h"
25#include "hw/virtio/vhost.h"
26
27
28typedef struct VhostVDPAState {
29 NetClientState nc;
30 struct vhost_vdpa vhost_vdpa;
31 VHostNetState *vhost_net;
32 uint64_t acked_features;
33 bool started;
34} VhostVDPAState;
35
36const int vdpa_feature_bits[] = {
37 VIRTIO_F_NOTIFY_ON_EMPTY,
38 VIRTIO_RING_F_INDIRECT_DESC,
39 VIRTIO_RING_F_EVENT_IDX,
40 VIRTIO_F_ANY_LAYOUT,
41 VIRTIO_F_VERSION_1,
42 VIRTIO_NET_F_CSUM,
43 VIRTIO_NET_F_GUEST_CSUM,
44 VIRTIO_NET_F_GSO,
45 VIRTIO_NET_F_GUEST_TSO4,
46 VIRTIO_NET_F_GUEST_TSO6,
47 VIRTIO_NET_F_GUEST_ECN,
48 VIRTIO_NET_F_GUEST_UFO,
49 VIRTIO_NET_F_HOST_TSO4,
50 VIRTIO_NET_F_HOST_TSO6,
51 VIRTIO_NET_F_HOST_ECN,
52 VIRTIO_NET_F_HOST_UFO,
53 VIRTIO_NET_F_MRG_RXBUF,
54 VIRTIO_NET_F_MTU,
55 VIRTIO_F_IOMMU_PLATFORM,
56 VIRTIO_F_RING_PACKED,
57 VIRTIO_NET_F_GUEST_ANNOUNCE,
58 VIRTIO_NET_F_STATUS,
59 VHOST_INVALID_FEATURE_BIT
60};
61
62VHostNetState *vhost_vdpa_get_vhost_net(NetClientState *nc)
63{
64 VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc);
65 assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA);
66 return s->vhost_net;
67}
68
69uint64_t vhost_vdpa_get_acked_features(NetClientState *nc)
70{
71 VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc);
72 assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA);
73 s->acked_features = vhost_net_get_acked_features(s->vhost_net);
74
75 return s->acked_features;
76}
77
78static int vhost_vdpa_net_check_device_id(struct vhost_net *net)
79{
80 uint32_t device_id;
81 int ret;
82 struct vhost_dev *hdev;
83
84 hdev = (struct vhost_dev *)&net->dev;
85 ret = hdev->vhost_ops->vhost_get_device_id(hdev, &device_id);
86 if (device_id != VIRTIO_ID_NET) {
87 return -ENOTSUP;
88 }
89 return ret;
90}
91
92static void vhost_vdpa_del(NetClientState *ncs)
93{
94 VhostVDPAState *s;
95 assert(ncs->info->type == NET_CLIENT_DRIVER_VHOST_VDPA);
96 s = DO_UPCAST(VhostVDPAState, nc, ncs);
97 if (s->vhost_net) {
98 vhost_net_cleanup(s->vhost_net);
99 }
100}
101
102static int vhost_vdpa_add(NetClientState *ncs, void *be)
103{
104 VhostNetOptions options;
105 struct vhost_net *net = NULL;
106 VhostVDPAState *s;
107 int ret;
108
109 options.backend_type = VHOST_BACKEND_TYPE_VDPA;
110 assert(ncs->info->type == NET_CLIENT_DRIVER_VHOST_VDPA);
111 s = DO_UPCAST(VhostVDPAState, nc, ncs);
112 options.net_backend = ncs;
113 options.opaque = be;
114 options.busyloop_timeout = 0;
115
116 net = vhost_net_init(&options);
117 if (!net) {
118 error_report("failed to init vhost_net for queue");
119 goto err;
120 }
121 if (s->vhost_net) {
122 vhost_net_cleanup(s->vhost_net);
123 g_free(s->vhost_net);
124 }
125 s->vhost_net = net;
126 ret = vhost_vdpa_net_check_device_id(net);
127 if (ret) {
128 goto err;
129 }
130 return 0;
131err:
132 if (net) {
133 vhost_net_cleanup(net);
134 }
135 vhost_vdpa_del(ncs);
136 return -1;
137}
138
139static void vhost_vdpa_cleanup(NetClientState *nc)
140{
141 VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc);
142
143 if (s->vhost_net) {
144 vhost_net_cleanup(s->vhost_net);
145 g_free(s->vhost_net);
146 s->vhost_net = NULL;
147 }
148 if (s->vhost_vdpa.device_fd >= 0) {
149 qemu_close(s->vhost_vdpa.device_fd);
150 s->vhost_vdpa.device_fd = -1;
151 }
152}
153
154static bool vhost_vdpa_has_vnet_hdr(NetClientState *nc)
155{
156 assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA);
157
158 return true;
159}
160
161static bool vhost_vdpa_has_ufo(NetClientState *nc)
162{
163 assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA);
164 VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc);
165 uint64_t features = 0;
166 features |= (1ULL << VIRTIO_NET_F_HOST_UFO);
167 features = vhost_net_get_features(s->vhost_net, features);
168 return !!(features & (1ULL << VIRTIO_NET_F_HOST_UFO));
169
170}
171
172static NetClientInfo net_vhost_vdpa_info = {
173 .type = NET_CLIENT_DRIVER_VHOST_VDPA,
174 .size = sizeof(VhostVDPAState),
175 .cleanup = vhost_vdpa_cleanup,
176 .has_vnet_hdr = vhost_vdpa_has_vnet_hdr,
177 .has_ufo = vhost_vdpa_has_ufo,
178};
179
180static int net_vhost_vdpa_init(NetClientState *peer, const char *device,
181 const char *name, const char *vhostdev)
182{
183 NetClientState *nc = NULL;
184 VhostVDPAState *s;
185 int vdpa_device_fd = -1;
186 int ret = 0;
187 assert(name);
188 nc = qemu_new_net_client(&net_vhost_vdpa_info, peer, device, name);
189 snprintf(nc->info_str, sizeof(nc->info_str), TYPE_VHOST_VDPA);
190 nc->queue_index = 0;
191 s = DO_UPCAST(VhostVDPAState, nc, nc);
192 vdpa_device_fd = qemu_open_old(vhostdev, O_RDWR);
193 if (vdpa_device_fd == -1) {
194 return -errno;
195 }
196 s->vhost_vdpa.device_fd = vdpa_device_fd;
197 ret = vhost_vdpa_add(nc, (void *)&s->vhost_vdpa);
198 assert(s->vhost_net);
199 return ret;
200}
201
202static int net_vhost_check_net(void *opaque, QemuOpts *opts, Error **errp)
203{
204 const char *name = opaque;
205 const char *driver, *netdev;
206
207 driver = qemu_opt_get(opts, "driver");
208 netdev = qemu_opt_get(opts, "netdev");
209 if (!driver || !netdev) {
210 return 0;
211 }
212 if (strcmp(netdev, name) == 0 &&
213 !g_str_has_prefix(driver, "virtio-net-")) {
214 error_setg(errp, "vhost-vdpa requires frontend driver virtio-net-*");
215 return -1;
216 }
217 return 0;
218}
219
220int net_init_vhost_vdpa(const Netdev *netdev, const char *name,
221 NetClientState *peer, Error **errp)
222{
223 const NetdevVhostVDPAOptions *opts;
224
225 assert(netdev->type == NET_CLIENT_DRIVER_VHOST_VDPA);
226 opts = &netdev->u.vhost_vdpa;
227
228 if (qemu_opts_foreach(qemu_find_opts("device"), net_vhost_check_net,
229 (char *)name, errp)) {
230 return -1;
231 }
232 return net_vhost_vdpa_init(peer, TYPE_VHOST_VDPA, name, opts->vhostdev);
233}
234
