1#define _GNU_SOURCE
2#include <getopt.h>
3#include <string.h>
4#include <poll.h>
5#include <sys/eventfd.h>
6#include <stdlib.h>
7#include <assert.h>
8#include <unistd.h>
9#include <sys/ioctl.h>
10#include <sys/stat.h>
11#include <sys/types.h>
12#include <fcntl.h>
13#include <linux/vhost.h>
14#include <linux/virtio.h>
15#include <linux/virtio_ring.h>
16#include "../../drivers/vhost/test.h"
17
18struct vq_info {
19 int kick;
20 int call;
21 int num;
22 int idx;
23 void *ring;
24
25 struct vring vring;
26 struct virtqueue *vq;
27};
28
29struct vdev_info {
30 struct virtio_device vdev;
31 int control;
32 struct pollfd fds[1];
33 struct vq_info vqs[1];
34 int nvqs;
35 void *buf;
36 size_t buf_size;
37 struct vhost_memory *mem;
38};
39
40void vq_notify(struct virtqueue *vq)
41{
42 struct vq_info *info = vq->priv;
43 unsigned long long v = 1;
44 int r;
45 r = write(info->kick, &v, sizeof v);
46 assert(r == sizeof v);
47}
48
49void vq_callback(struct virtqueue *vq)
50{
51}
52
53
54void vhost_vq_setup(struct vdev_info *dev, struct vq_info *info)
55{
56 struct vhost_vring_state state = { .index = info->idx };
57 struct vhost_vring_file file = { .index = info->idx };
58 unsigned long long features = dev->vdev.features[0];
59 struct vhost_vring_addr addr = {
60 .index = info->idx,
61 .desc_user_addr = (uint64_t)(unsigned long)info->vring.desc,
62 .avail_user_addr = (uint64_t)(unsigned long)info->vring.avail,
63 .used_user_addr = (uint64_t)(unsigned long)info->vring.used,
64 };
65 int r;
66 r = ioctl(dev->control, VHOST_SET_FEATURES, &features);
67 assert(r >= 0);
68 state.num = info->vring.num;
69 r = ioctl(dev->control, VHOST_SET_VRING_NUM, &state);
70 assert(r >= 0);
71 state.num = 0;
72 r = ioctl(dev->control, VHOST_SET_VRING_BASE, &state);
73 assert(r >= 0);
74 r = ioctl(dev->control, VHOST_SET_VRING_ADDR, &addr);
75 assert(r >= 0);
76 file.fd = info->kick;
77 r = ioctl(dev->control, VHOST_SET_VRING_KICK, &file);
78 assert(r >= 0);
79 file.fd = info->call;
80 r = ioctl(dev->control, VHOST_SET_VRING_CALL, &file);
81 assert(r >= 0);
82}
83
84static void vq_info_add(struct vdev_info *dev, int num)
85{
86 struct vq_info *info = &dev->vqs[dev->nvqs];
87 int r;
88 info->idx = dev->nvqs;
89 info->kick = eventfd(0, EFD_NONBLOCK);
90 info->call = eventfd(0, EFD_NONBLOCK);
91 r = posix_memalign(&info->ring, 4096, vring_size(num, 4096));
92 assert(r >= 0);
93 memset(info->ring, 0, vring_size(num, 4096));
94 vring_init(&info->vring, num, info->ring, 4096);
95 info->vq = vring_new_virtqueue(info->vring.num, 4096, &dev->vdev,
96 true, info->ring,
97 vq_notify, vq_callback, "test");
98 assert(info->vq);
99 info->vq->priv = info;
100 vhost_vq_setup(dev, info);
101 dev->fds[info->idx].fd = info->call;
102 dev->fds[info->idx].events = POLLIN;
103 dev->nvqs++;
104}
105
106static void vdev_info_init(struct vdev_info* dev, unsigned long long features)
107{
108 int r;
109 memset(dev, 0, sizeof *dev);
110 dev->vdev.features[0] = features;
111 dev->vdev.features[1] = features >> 32;
112 dev->buf_size = 1024;
113 dev->buf = malloc(dev->buf_size);
114 assert(dev->buf);
115 dev->control = open("/dev/vhost-test", O_RDWR);
116 assert(dev->control >= 0);
117 r = ioctl(dev->control, VHOST_SET_OWNER, NULL);
118 assert(r >= 0);
119 dev->mem = malloc(offsetof(struct vhost_memory, regions) +
120 sizeof dev->mem->regions[0]);
121 assert(dev->mem);
122 memset(dev->mem, 0, offsetof(struct vhost_memory, regions) +
123 sizeof dev->mem->regions[0]);
124 dev->mem->nregions = 1;
125 dev->mem->regions[0].guest_phys_addr = (long)dev->buf;
126 dev->mem->regions[0].userspace_addr = (long)dev->buf;
127 dev->mem->regions[0].memory_size = dev->buf_size;
128 r = ioctl(dev->control, VHOST_SET_MEM_TABLE, dev->mem);
129 assert(r >= 0);
130}
131
132
133
134
135
136static void wait_for_interrupt(struct vdev_info *dev)
137{
138 int i;
139 unsigned long long val;
140 poll(dev->fds, dev->nvqs, -1);
141 for (i = 0; i < dev->nvqs; ++i)
142 if (dev->fds[i].revents & POLLIN) {
143 read(dev->fds[i].fd, &val, sizeof val);
144 }
145}
146
147static void run_test(struct vdev_info *dev, struct vq_info *vq,
148 bool delayed, int bufs)
149{
150 struct scatterlist sl;
151 long started = 0, completed = 0;
152 long completed_before;
153 int r, test = 1;
154 unsigned len;
155 long long spurious = 0;
156 r = ioctl(dev->control, VHOST_TEST_RUN, &test);
157 assert(r >= 0);
158 for (;;) {
159 virtqueue_disable_cb(vq->vq);
160 completed_before = completed;
161 do {
162 if (started < bufs) {
163 sg_init_one(&sl, dev->buf, dev->buf_size);
164 r = virtqueue_add_buf(vq->vq, &sl, 1, 0,
165 dev->buf + started,
166 GFP_ATOMIC);
167 if (likely(r == 0)) {
168 ++started;
169 virtqueue_kick(vq->vq);
170 }
171 } else
172 r = -1;
173
174
175 if (virtqueue_get_buf(vq->vq, &len)) {
176 ++completed;
177 r = 0;
178 }
179
180 } while (r == 0);
181 if (completed == completed_before)
182 ++spurious;
183 assert(completed <= bufs);
184 assert(started <= bufs);
185 if (completed == bufs)
186 break;
187 if (delayed) {
188 if (virtqueue_enable_cb_delayed(vq->vq))
189 wait_for_interrupt(dev);
190 } else {
191 if (virtqueue_enable_cb(vq->vq))
192 wait_for_interrupt(dev);
193 }
194 }
195 test = 0;
196 r = ioctl(dev->control, VHOST_TEST_RUN, &test);
197 assert(r >= 0);
198 fprintf(stderr, "spurious wakeus: 0x%llx\n", spurious);
199}
200
201const char optstring[] = "h";
202const struct option longopts[] = {
203 {
204 .name = "help",
205 .val = 'h',
206 },
207 {
208 .name = "event-idx",
209 .val = 'E',
210 },
211 {
212 .name = "no-event-idx",
213 .val = 'e',
214 },
215 {
216 .name = "indirect",
217 .val = 'I',
218 },
219 {
220 .name = "no-indirect",
221 .val = 'i',
222 },
223 {
224 .name = "delayed-interrupt",
225 .val = 'D',
226 },
227 {
228 .name = "no-delayed-interrupt",
229 .val = 'd',
230 },
231 {
232 }
233};
234
235static void help(void)
236{
237 fprintf(stderr, "Usage: virtio_test [--help]"
238 " [--no-indirect]"
239 " [--no-event-idx]"
240 " [--delayed-interrupt]"
241 "\n");
242}
243
244int main(int argc, char **argv)
245{
246 struct vdev_info dev;
247 unsigned long long features = (1ULL << VIRTIO_RING_F_INDIRECT_DESC) |
248 (1ULL << VIRTIO_RING_F_EVENT_IDX);
249 int o;
250 bool delayed = false;
251
252 for (;;) {
253 o = getopt_long(argc, argv, optstring, longopts, NULL);
254 switch (o) {
255 case -1:
256 goto done;
257 case '?':
258 help();
259 exit(2);
260 case 'e':
261 features &= ~(1ULL << VIRTIO_RING_F_EVENT_IDX);
262 break;
263 case 'h':
264 help();
265 goto done;
266 case 'i':
267 features &= ~(1ULL << VIRTIO_RING_F_INDIRECT_DESC);
268 break;
269 case 'D':
270 delayed = true;
271 break;
272 default:
273 assert(0);
274 break;
275 }
276 }
277
278done:
279 vdev_info_init(&dev, features);
280 vq_info_add(&dev, 256);
281 run_test(&dev, &dev.vqs[0], delayed, 0x100000);
282 return 0;
283}
284
