Merge remote-tracking branch 'remotes/bonzini-gitlab/tags/for-upstream' into staging
[qemu.git] / net / vhost-vdpa.c
1 /*
2 * vhost-vdpa.c
3 *
4 * Copyright(c) 2017-2018 Intel Corporation.
5 * Copyright(c) 2020 Red Hat, Inc.
6 *
7 * This work is licensed under the terms of the GNU GPL, version 2 or later.
8 * See the COPYING file in the top-level directory.
9 *
10 */
11
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 /* Todo:need to add the multiqueue support here */
28 typedef 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
36 const 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 VHOST_INVALID_FEATURE_BIT
59 };
60
61 VHostNetState *vhost_vdpa_get_vhost_net(NetClientState *nc)
62 {
63 VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc);
64 assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA);
65 return s->vhost_net;
66 }
67
68 uint64_t vhost_vdpa_get_acked_features(NetClientState *nc)
69 {
70 VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc);
71 assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA);
72 s->acked_features = vhost_net_get_acked_features(s->vhost_net);
73
74 return s->acked_features;
75 }
76
77 static int vhost_vdpa_net_check_device_id(struct vhost_net *net)
78 {
79 uint32_t device_id;
80 int ret;
81 struct vhost_dev *hdev;
82
83 hdev = (struct vhost_dev *)&net->dev;
84 ret = hdev->vhost_ops->vhost_get_device_id(hdev, &device_id);
85 if (device_id != VIRTIO_ID_NET) {
86 return -ENOTSUP;
87 }
88 return ret;
89 }
90
91 static void vhost_vdpa_del(NetClientState *ncs)
92 {
93 VhostVDPAState *s;
94 assert(ncs->info->type == NET_CLIENT_DRIVER_VHOST_VDPA);
95 s = DO_UPCAST(VhostVDPAState, nc, ncs);
96 if (s->vhost_net) {
97 vhost_net_cleanup(s->vhost_net);
98 }
99 }
100
101 static int vhost_vdpa_add(NetClientState *ncs, void *be)
102 {
103 VhostNetOptions options;
104 struct vhost_net *net = NULL;
105 VhostVDPAState *s;
106 int ret;
107
108 options.backend_type = VHOST_BACKEND_TYPE_VDPA;
109 assert(ncs->info->type == NET_CLIENT_DRIVER_VHOST_VDPA);
110 s = DO_UPCAST(VhostVDPAState, nc, ncs);
111 options.net_backend = ncs;
112 options.opaque = be;
113 options.busyloop_timeout = 0;
114
115 net = vhost_net_init(&options);
116 if (!net) {
117 error_report("failed to init vhost_net for queue");
118 goto err;
119 }
120 if (s->vhost_net) {
121 vhost_net_cleanup(s->vhost_net);
122 g_free(s->vhost_net);
123 }
124 s->vhost_net = net;
125 ret = vhost_vdpa_net_check_device_id(net);
126 if (ret) {
127 goto err;
128 }
129 return 0;
130 err:
131 if (net) {
132 vhost_net_cleanup(net);
133 }
134 vhost_vdpa_del(ncs);
135 return -1;
136 }
137
138 static void vhost_vdpa_cleanup(NetClientState *nc)
139 {
140 VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc);
141
142 if (s->vhost_net) {
143 vhost_net_cleanup(s->vhost_net);
144 g_free(s->vhost_net);
145 s->vhost_net = NULL;
146 }
147 }
148
149 static bool vhost_vdpa_has_vnet_hdr(NetClientState *nc)
150 {
151 assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA);
152
153 return true;
154 }
155
156 static bool vhost_vdpa_has_ufo(NetClientState *nc)
157 {
158 assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA);
159 VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc);
160 uint64_t features = 0;
161 features |= (1ULL << VIRTIO_NET_F_HOST_UFO);
162 features = vhost_net_get_features(s->vhost_net, features);
163 return !!(features & (1ULL << VIRTIO_NET_F_HOST_UFO));
164
165 }
166
167 static NetClientInfo net_vhost_vdpa_info = {
168 .type = NET_CLIENT_DRIVER_VHOST_VDPA,
169 .size = sizeof(VhostVDPAState),
170 .cleanup = vhost_vdpa_cleanup,
171 .has_vnet_hdr = vhost_vdpa_has_vnet_hdr,
172 .has_ufo = vhost_vdpa_has_ufo,
173 };
174
175 static int net_vhost_vdpa_init(NetClientState *peer, const char *device,
176 const char *name, const char *vhostdev)
177 {
178 NetClientState *nc = NULL;
179 VhostVDPAState *s;
180 int vdpa_device_fd = -1;
181 int ret = 0;
182 assert(name);
183 nc = qemu_new_net_client(&net_vhost_vdpa_info, peer, device, name);
184 snprintf(nc->info_str, sizeof(nc->info_str), TYPE_VHOST_VDPA);
185 nc->queue_index = 0;
186 s = DO_UPCAST(VhostVDPAState, nc, nc);
187 vdpa_device_fd = qemu_open_old(vhostdev, O_RDWR);
188 if (vdpa_device_fd == -1) {
189 return -errno;
190 }
191 s->vhost_vdpa.device_fd = vdpa_device_fd;
192 ret = vhost_vdpa_add(nc, (void *)&s->vhost_vdpa);
193 assert(s->vhost_net);
194 return ret;
195 }
196
197 static int net_vhost_check_net(void *opaque, QemuOpts *opts, Error **errp)
198 {
199 const char *name = opaque;
200 const char *driver, *netdev;
201
202 driver = qemu_opt_get(opts, "driver");
203 netdev = qemu_opt_get(opts, "netdev");
204 if (!driver || !netdev) {
205 return 0;
206 }
207 if (strcmp(netdev, name) == 0 &&
208 !g_str_has_prefix(driver, "virtio-net-")) {
209 error_setg(errp, "vhost-vdpa requires frontend driver virtio-net-*");
210 return -1;
211 }
212 return 0;
213 }
214
215 int net_init_vhost_vdpa(const Netdev *netdev, const char *name,
216 NetClientState *peer, Error **errp)
217 {
218 const NetdevVhostVDPAOptions *opts;
219
220 assert(netdev->type == NET_CLIENT_DRIVER_VHOST_VDPA);
221 opts = &netdev->u.vhost_vdpa;
222 /* verify net frontend */
223 if (qemu_opts_foreach(qemu_find_opts("device"), net_vhost_check_net,
224 (char *)name, errp)) {
225 return -1;
226 }
227 return net_vhost_vdpa_init(peer, TYPE_VHOST_VDPA, name, opts->vhostdev);
228 }