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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 <stdbool.h>
14#include <linux/vhost.h>
15#include <linux/virtio.h>
16#include <linux/virtio_ring.h>
17#include "../../drivers/vhost/test.h"
18
19/* Unused */
20void *__kmalloc_fake, *__kfree_ignore_start, *__kfree_ignore_end;
21
22struct vq_info {
23 int kick;
24 int call;
25 int num;
26 int idx;
27 void *ring;
28 /* copy used for control */
29 struct vring vring;
30 struct virtqueue *vq;
31};
32
33struct vdev_info {
34 struct virtio_device vdev;
35 int control;
36 struct pollfd fds[1];
37 struct vq_info vqs[1];
38 int nvqs;
39 void *buf;
40 size_t buf_size;
41 struct vhost_memory *mem;
42};
43
44bool vq_notify(struct virtqueue *vq)
45{
46 struct vq_info *info = vq->priv;
47 unsigned long long v = 1;
48 int r;
49 r = write(info->kick, &v, sizeof v);
50 assert(r == sizeof v);
51 return true;
52}
53
54void vq_callback(struct virtqueue *vq)
55{
56}
57
58
59void vhost_vq_setup(struct vdev_info *dev, struct vq_info *info)
60{
61 struct vhost_vring_state state = { .index = info->idx };
62 struct vhost_vring_file file = { .index = info->idx };
63 unsigned long long features = dev->vdev.features[0];
64 struct vhost_vring_addr addr = {
65 .index = info->idx,
66 .desc_user_addr = (uint64_t)(unsigned long)info->vring.desc,
67 .avail_user_addr = (uint64_t)(unsigned long)info->vring.avail,
68 .used_user_addr = (uint64_t)(unsigned long)info->vring.used,
69 };
70 int r;
71 r = ioctl(dev->control, VHOST_SET_FEATURES, &features);
72 assert(r >= 0);
73 state.num = info->vring.num;
74 r = ioctl(dev->control, VHOST_SET_VRING_NUM, &state);
75 assert(r >= 0);
76 state.num = 0;
77 r = ioctl(dev->control, VHOST_SET_VRING_BASE, &state);
78 assert(r >= 0);
79 r = ioctl(dev->control, VHOST_SET_VRING_ADDR, &addr);
80 assert(r >= 0);
81 file.fd = info->kick;
82 r = ioctl(dev->control, VHOST_SET_VRING_KICK, &file);
83 assert(r >= 0);
84 file.fd = info->call;
85 r = ioctl(dev->control, VHOST_SET_VRING_CALL, &file);
86 assert(r >= 0);
87}
88
89static void vq_info_add(struct vdev_info *dev, int num)
90{
91 struct vq_info *info = &dev->vqs[dev->nvqs];
92 int r;
93 info->idx = dev->nvqs;
94 info->kick = eventfd(0, EFD_NONBLOCK);
95 info->call = eventfd(0, EFD_NONBLOCK);
96 r = posix_memalign(&info->ring, 4096, vring_size(num, 4096));
97 assert(r >= 0);
98 memset(info->ring, 0, vring_size(num, 4096));
99 vring_init(&info->vring, num, info->ring, 4096);
100 info->vq = vring_new_virtqueue(info->idx,
101 info->vring.num, 4096, &dev->vdev,
102 true, info->ring,
103 vq_notify, vq_callback, "test");
104 assert(info->vq);
105 info->vq->priv = info;
106 vhost_vq_setup(dev, info);
107 dev->fds[info->idx].fd = info->call;
108 dev->fds[info->idx].events = POLLIN;
109 dev->nvqs++;
110}
111
112static void vdev_info_init(struct vdev_info* dev, unsigned long long features)
113{
114 int r;
115 memset(dev, 0, sizeof *dev);
116 dev->vdev.features[0] = features;
117 dev->vdev.features[1] = features >> 32;
118 dev->buf_size = 1024;
119 dev->buf = malloc(dev->buf_size);
120 assert(dev->buf);
121 dev->control = open("/dev/vhost-test", O_RDWR);
122 assert(dev->control >= 0);
123 r = ioctl(dev->control, VHOST_SET_OWNER, NULL);
124 assert(r >= 0);
125 dev->mem = malloc(offsetof(struct vhost_memory, regions) +
126 sizeof dev->mem->regions[0]);
127 assert(dev->mem);
128 memset(dev->mem, 0, offsetof(struct vhost_memory, regions) +
129 sizeof dev->mem->regions[0]);
130 dev->mem->nregions = 1;
131 dev->mem->regions[0].guest_phys_addr = (long)dev->buf;
132 dev->mem->regions[0].userspace_addr = (long)dev->buf;
133 dev->mem->regions[0].memory_size = dev->buf_size;
134 r = ioctl(dev->control, VHOST_SET_MEM_TABLE, dev->mem);
135 assert(r >= 0);
136}
137
138/* TODO: this is pretty bad: we get a cache line bounce
139 * for the wait queue on poll and another one on read,
140 * plus the read which is there just to clear the
141 * current state. */
142static void wait_for_interrupt(struct vdev_info *dev)
143{
144 int i;
145 unsigned long long val;
146 poll(dev->fds, dev->nvqs, -1);
147 for (i = 0; i < dev->nvqs; ++i)
148 if (dev->fds[i].revents & POLLIN) {
149 read(dev->fds[i].fd, &val, sizeof val);
150 }
151}
152
153static void run_test(struct vdev_info *dev, struct vq_info *vq,
154 bool delayed, int bufs)
155{
156 struct scatterlist sl;
157 long started = 0, completed = 0;
158 long completed_before;
159 int r, test = 1;
160 unsigned len;
161 long long spurious = 0;
162 r = ioctl(dev->control, VHOST_TEST_RUN, &test);
163 assert(r >= 0);
164 for (;;) {
165 virtqueue_disable_cb(vq->vq);
166 completed_before = completed;
167 do {
168 if (started < bufs) {
169 sg_init_one(&sl, dev->buf, dev->buf_size);
170 r = virtqueue_add_outbuf(vq->vq, &sl, 1,
171 dev->buf + started,
172 GFP_ATOMIC);
173 if (likely(r == 0)) {
174 ++started;
175 if (unlikely(!virtqueue_kick(vq->vq)))
176 r = -1;
177 }
178 } else
179 r = -1;
180
181 /* Flush out completed bufs if any */
182 if (virtqueue_get_buf(vq->vq, &len)) {
183 ++completed;
184 r = 0;
185 }
186
187 } while (r == 0);
188 if (completed == completed_before)
189 ++spurious;
190 assert(completed <= bufs);
191 assert(started <= bufs);
192 if (completed == bufs)
193 break;
194 if (delayed) {
195 if (virtqueue_enable_cb_delayed(vq->vq))
196 wait_for_interrupt(dev);
197 } else {
198 if (virtqueue_enable_cb(vq->vq))
199 wait_for_interrupt(dev);
200 }
201 }
202 test = 0;
203 r = ioctl(dev->control, VHOST_TEST_RUN, &test);
204 assert(r >= 0);
205 fprintf(stderr, "spurious wakeus: 0x%llx\n", spurious);
206}
207
208const char optstring[] = "h";
209const struct option longopts[] = {
210 {
211 .name = "help",
212 .val = 'h',
213 },
214 {
215 .name = "event-idx",
216 .val = 'E',
217 },
218 {
219 .name = "no-event-idx",
220 .val = 'e',
221 },
222 {
223 .name = "indirect",
224 .val = 'I',
225 },
226 {
227 .name = "no-indirect",
228 .val = 'i',
229 },
230 {
231 .name = "delayed-interrupt",
232 .val = 'D',
233 },
234 {
235 .name = "no-delayed-interrupt",
236 .val = 'd',
237 },
238 {
239 }
240};
241
242static void help(void)
243{
244 fprintf(stderr, "Usage: virtio_test [--help]"
245 " [--no-indirect]"
246 " [--no-event-idx]"
247 " [--delayed-interrupt]"
248 "\n");
249}
250
251int main(int argc, char **argv)
252{
253 struct vdev_info dev;
254 unsigned long long features = (1ULL << VIRTIO_RING_F_INDIRECT_DESC) |
255 (1ULL << VIRTIO_RING_F_EVENT_IDX);
256 int o;
257 bool delayed = false;
258
259 for (;;) {
260 o = getopt_long(argc, argv, optstring, longopts, NULL);
261 switch (o) {
262 case -1:
263 goto done;
264 case '?':
265 help();
266 exit(2);
267 case 'e':
268 features &= ~(1ULL << VIRTIO_RING_F_EVENT_IDX);
269 break;
270 case 'h':
271 help();
272 goto done;
273 case 'i':
274 features &= ~(1ULL << VIRTIO_RING_F_INDIRECT_DESC);
275 break;
276 case 'D':
277 delayed = true;
278 break;
279 default:
280 assert(0);
281 break;
282 }
283 }
284
285done:
286 vdev_info_init(&dev, features);
287 vq_info_add(&dev, 256);
288 run_test(&dev, &dev.vqs[0], delayed, 0x100000);
289 return 0;
290}
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 <stdbool.h>
14#include <linux/virtio_types.h>
15#include <linux/vhost.h>
16#include <linux/virtio.h>
17#include <linux/virtio_ring.h>
18#include "../../drivers/vhost/test.h"
19
20/* Unused */
21void *__kmalloc_fake, *__kfree_ignore_start, *__kfree_ignore_end;
22
23struct vq_info {
24 int kick;
25 int call;
26 int num;
27 int idx;
28 void *ring;
29 /* copy used for control */
30 struct vring vring;
31 struct virtqueue *vq;
32};
33
34struct vdev_info {
35 struct virtio_device vdev;
36 int control;
37 struct pollfd fds[1];
38 struct vq_info vqs[1];
39 int nvqs;
40 void *buf;
41 size_t buf_size;
42 struct vhost_memory *mem;
43};
44
45bool vq_notify(struct virtqueue *vq)
46{
47 struct vq_info *info = vq->priv;
48 unsigned long long v = 1;
49 int r;
50 r = write(info->kick, &v, sizeof v);
51 assert(r == sizeof v);
52 return true;
53}
54
55void vq_callback(struct virtqueue *vq)
56{
57}
58
59
60void vhost_vq_setup(struct vdev_info *dev, struct vq_info *info)
61{
62 struct vhost_vring_state state = { .index = info->idx };
63 struct vhost_vring_file file = { .index = info->idx };
64 unsigned long long features = dev->vdev.features;
65 struct vhost_vring_addr addr = {
66 .index = info->idx,
67 .desc_user_addr = (uint64_t)(unsigned long)info->vring.desc,
68 .avail_user_addr = (uint64_t)(unsigned long)info->vring.avail,
69 .used_user_addr = (uint64_t)(unsigned long)info->vring.used,
70 };
71 int r;
72 r = ioctl(dev->control, VHOST_SET_FEATURES, &features);
73 assert(r >= 0);
74 state.num = info->vring.num;
75 r = ioctl(dev->control, VHOST_SET_VRING_NUM, &state);
76 assert(r >= 0);
77 state.num = 0;
78 r = ioctl(dev->control, VHOST_SET_VRING_BASE, &state);
79 assert(r >= 0);
80 r = ioctl(dev->control, VHOST_SET_VRING_ADDR, &addr);
81 assert(r >= 0);
82 file.fd = info->kick;
83 r = ioctl(dev->control, VHOST_SET_VRING_KICK, &file);
84 assert(r >= 0);
85 file.fd = info->call;
86 r = ioctl(dev->control, VHOST_SET_VRING_CALL, &file);
87 assert(r >= 0);
88}
89
90static void vq_info_add(struct vdev_info *dev, int num)
91{
92 struct vq_info *info = &dev->vqs[dev->nvqs];
93 int r;
94 info->idx = dev->nvqs;
95 info->kick = eventfd(0, EFD_NONBLOCK);
96 info->call = eventfd(0, EFD_NONBLOCK);
97 r = posix_memalign(&info->ring, 4096, vring_size(num, 4096));
98 assert(r >= 0);
99 memset(info->ring, 0, vring_size(num, 4096));
100 vring_init(&info->vring, num, info->ring, 4096);
101 info->vq = vring_new_virtqueue(info->idx,
102 info->vring.num, 4096, &dev->vdev,
103 true, info->ring,
104 vq_notify, vq_callback, "test");
105 assert(info->vq);
106 info->vq->priv = info;
107 vhost_vq_setup(dev, info);
108 dev->fds[info->idx].fd = info->call;
109 dev->fds[info->idx].events = POLLIN;
110 dev->nvqs++;
111}
112
113static void vdev_info_init(struct vdev_info* dev, unsigned long long features)
114{
115 int r;
116 memset(dev, 0, sizeof *dev);
117 dev->vdev.features = features;
118 dev->buf_size = 1024;
119 dev->buf = malloc(dev->buf_size);
120 assert(dev->buf);
121 dev->control = open("/dev/vhost-test", O_RDWR);
122 assert(dev->control >= 0);
123 r = ioctl(dev->control, VHOST_SET_OWNER, NULL);
124 assert(r >= 0);
125 dev->mem = malloc(offsetof(struct vhost_memory, regions) +
126 sizeof dev->mem->regions[0]);
127 assert(dev->mem);
128 memset(dev->mem, 0, offsetof(struct vhost_memory, regions) +
129 sizeof dev->mem->regions[0]);
130 dev->mem->nregions = 1;
131 dev->mem->regions[0].guest_phys_addr = (long)dev->buf;
132 dev->mem->regions[0].userspace_addr = (long)dev->buf;
133 dev->mem->regions[0].memory_size = dev->buf_size;
134 r = ioctl(dev->control, VHOST_SET_MEM_TABLE, dev->mem);
135 assert(r >= 0);
136}
137
138/* TODO: this is pretty bad: we get a cache line bounce
139 * for the wait queue on poll and another one on read,
140 * plus the read which is there just to clear the
141 * current state. */
142static void wait_for_interrupt(struct vdev_info *dev)
143{
144 int i;
145 unsigned long long val;
146 poll(dev->fds, dev->nvqs, -1);
147 for (i = 0; i < dev->nvqs; ++i)
148 if (dev->fds[i].revents & POLLIN) {
149 read(dev->fds[i].fd, &val, sizeof val);
150 }
151}
152
153static void run_test(struct vdev_info *dev, struct vq_info *vq,
154 bool delayed, int bufs)
155{
156 struct scatterlist sl;
157 long started = 0, completed = 0;
158 long completed_before;
159 int r, test = 1;
160 unsigned len;
161 long long spurious = 0;
162 r = ioctl(dev->control, VHOST_TEST_RUN, &test);
163 assert(r >= 0);
164 for (;;) {
165 virtqueue_disable_cb(vq->vq);
166 completed_before = completed;
167 do {
168 if (started < bufs) {
169 sg_init_one(&sl, dev->buf, dev->buf_size);
170 r = virtqueue_add_outbuf(vq->vq, &sl, 1,
171 dev->buf + started,
172 GFP_ATOMIC);
173 if (likely(r == 0)) {
174 ++started;
175 if (unlikely(!virtqueue_kick(vq->vq)))
176 r = -1;
177 }
178 } else
179 r = -1;
180
181 /* Flush out completed bufs if any */
182 if (virtqueue_get_buf(vq->vq, &len)) {
183 ++completed;
184 r = 0;
185 }
186
187 } while (r == 0);
188 if (completed == completed_before)
189 ++spurious;
190 assert(completed <= bufs);
191 assert(started <= bufs);
192 if (completed == bufs)
193 break;
194 if (delayed) {
195 if (virtqueue_enable_cb_delayed(vq->vq))
196 wait_for_interrupt(dev);
197 } else {
198 if (virtqueue_enable_cb(vq->vq))
199 wait_for_interrupt(dev);
200 }
201 }
202 test = 0;
203 r = ioctl(dev->control, VHOST_TEST_RUN, &test);
204 assert(r >= 0);
205 fprintf(stderr, "spurious wakeus: 0x%llx\n", spurious);
206}
207
208const char optstring[] = "h";
209const struct option longopts[] = {
210 {
211 .name = "help",
212 .val = 'h',
213 },
214 {
215 .name = "event-idx",
216 .val = 'E',
217 },
218 {
219 .name = "no-event-idx",
220 .val = 'e',
221 },
222 {
223 .name = "indirect",
224 .val = 'I',
225 },
226 {
227 .name = "no-indirect",
228 .val = 'i',
229 },
230 {
231 .name = "virtio-1",
232 .val = '1',
233 },
234 {
235 .name = "no-virtio-1",
236 .val = '0',
237 },
238 {
239 .name = "delayed-interrupt",
240 .val = 'D',
241 },
242 {
243 .name = "no-delayed-interrupt",
244 .val = 'd',
245 },
246 {
247 }
248};
249
250static void help(void)
251{
252 fprintf(stderr, "Usage: virtio_test [--help]"
253 " [--no-indirect]"
254 " [--no-event-idx]"
255 " [--no-virtio-1]"
256 " [--delayed-interrupt]"
257 "\n");
258}
259
260int main(int argc, char **argv)
261{
262 struct vdev_info dev;
263 unsigned long long features = (1ULL << VIRTIO_RING_F_INDIRECT_DESC) |
264 (1ULL << VIRTIO_RING_F_EVENT_IDX) | (1ULL << VIRTIO_F_VERSION_1);
265 int o;
266 bool delayed = false;
267
268 for (;;) {
269 o = getopt_long(argc, argv, optstring, longopts, NULL);
270 switch (o) {
271 case -1:
272 goto done;
273 case '?':
274 help();
275 exit(2);
276 case 'e':
277 features &= ~(1ULL << VIRTIO_RING_F_EVENT_IDX);
278 break;
279 case 'h':
280 help();
281 goto done;
282 case 'i':
283 features &= ~(1ULL << VIRTIO_RING_F_INDIRECT_DESC);
284 break;
285 case '0':
286 features &= ~(1ULL << VIRTIO_F_VERSION_1);
287 break;
288 case 'D':
289 delayed = true;
290 break;
291 default:
292 assert(0);
293 break;
294 }
295 }
296
297done:
298 vdev_info_init(&dev, features);
299 vq_info_add(&dev, 256);
300 run_test(&dev, &dev.vqs[0], delayed, 0x100000);
301 return 0;
302}