[deliverable/linux.git] / tools / virtio / virtio_test.c

#define _GNU_SOURCE
#include <getopt.h>
#include <string.h>
#include <poll.h>
#include <sys/eventfd.h>
#include <stdlib.h>
#include <assert.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <linux/vhost.h>
#include <linux/virtio.h>
#include <linux/virtio_ring.h>
#include "../../drivers/vhost/test.h"

struct vq_info {
	int kick;
	int call;
	int num;
	int idx;
	void *ring;
	/* copy used for control */
	struct vring vring;
	struct virtqueue *vq;
};

struct vdev_info {
	struct virtio_device vdev;
	int control;
	struct pollfd fds[1];
	struct vq_info vqs[1];
	int nvqs;
	void *buf;
	size_t buf_size;
	struct vhost_memory *mem;
};

void vq_notify(struct virtqueue *vq)
{
	struct vq_info *info = vq->priv;
	unsigned long long v = 1;
	int r;
	r = write(info->kick, &v, sizeof v);
	assert(r == sizeof v);
}

void vq_callback(struct virtqueue *vq)
{
}


void vhost_vq_setup(struct vdev_info *dev, struct vq_info *info)
{
	struct vhost_vring_state state = { .index = info->idx };
	struct vhost_vring_file file = { .index = info->idx };
	unsigned long long features = dev->vdev.features[0];
	struct vhost_vring_addr addr = {
		.index = info->idx,
		.desc_user_addr = (uint64_t)(unsigned long)info->vring.desc,
		.avail_user_addr = (uint64_t)(unsigned long)info->vring.avail,
		.used_user_addr = (uint64_t)(unsigned long)info->vring.used,
	};
	int r;
	r = ioctl(dev->control, VHOST_SET_FEATURES, &features);
	assert(r >= 0);
	state.num = info->vring.num;
	r = ioctl(dev->control, VHOST_SET_VRING_NUM, &state);
	assert(r >= 0);
	state.num = 0;
	r = ioctl(dev->control, VHOST_SET_VRING_BASE, &state);
	assert(r >= 0);
	r = ioctl(dev->control, VHOST_SET_VRING_ADDR, &addr);
	assert(r >= 0);
	file.fd = info->kick;
	r = ioctl(dev->control, VHOST_SET_VRING_KICK, &file);
	assert(r >= 0);
	file.fd = info->call;
	r = ioctl(dev->control, VHOST_SET_VRING_CALL, &file);
	assert(r >= 0);
}

static void vq_info_add(struct vdev_info *dev, int num)
{
	struct vq_info *info = &dev->vqs[dev->nvqs];
	int r;
	info->idx = dev->nvqs;
	info->kick = eventfd(0, EFD_NONBLOCK);
	info->call = eventfd(0, EFD_NONBLOCK);
	r = posix_memalign(&info->ring, 4096, vring_size(num, 4096));
	assert(r >= 0);
	memset(info->ring, 0, vring_size(num, 4096));
	vring_init(&info->vring, num, info->ring, 4096);
	info->vq = vring_new_virtqueue(info->idx,
				       info->vring.num, 4096, &dev->vdev,
				       true, info->ring,
				       vq_notify, vq_callback, "test");
	assert(info->vq);
	info->vq->priv = info;
	vhost_vq_setup(dev, info);
	dev->fds[info->idx].fd = info->call;
	dev->fds[info->idx].events = POLLIN;
	dev->nvqs++;
}

static void vdev_info_init(struct vdev_info* dev, unsigned long long features)
{
	int r;
	memset(dev, 0, sizeof *dev);
	dev->vdev.features[0] = features;
	dev->vdev.features[1] = features >> 32;
	dev->buf_size = 1024;
	dev->buf = malloc(dev->buf_size);
	assert(dev->buf);
        dev->control = open("/dev/vhost-test", O_RDWR);
	assert(dev->control >= 0);
	r = ioctl(dev->control, VHOST_SET_OWNER, NULL);
	assert(r >= 0);
	dev->mem = malloc(offsetof(struct vhost_memory, regions) +
			  sizeof dev->mem->regions[0]);
	assert(dev->mem);
	memset(dev->mem, 0, offsetof(struct vhost_memory, regions) +
                          sizeof dev->mem->regions[0]);
	dev->mem->nregions = 1;
	dev->mem->regions[0].guest_phys_addr = (long)dev->buf;
	dev->mem->regions[0].userspace_addr = (long)dev->buf;
	dev->mem->regions[0].memory_size = dev->buf_size;
	r = ioctl(dev->control, VHOST_SET_MEM_TABLE, dev->mem);
	assert(r >= 0);
}

/* TODO: this is pretty bad: we get a cache line bounce
 * for the wait queue on poll and another one on read,
 * plus the read which is there just to clear the
 * current state. */
static void wait_for_interrupt(struct vdev_info *dev)
{
	int i;
	unsigned long long val;
	poll(dev->fds, dev->nvqs, -1);
	for (i = 0; i < dev->nvqs; ++i)
		if (dev->fds[i].revents & POLLIN) {
			read(dev->fds[i].fd, &val, sizeof val);
		}
}

static void run_test(struct vdev_info *dev, struct vq_info *vq,
		     bool delayed, int bufs)
{
	struct scatterlist sl;
	long started = 0, completed = 0;
	long completed_before;
	int r, test = 1;
	unsigned len;
	long long spurious = 0;
	r = ioctl(dev->control, VHOST_TEST_RUN, &test);
	assert(r >= 0);
	for (;;) {
		virtqueue_disable_cb(vq->vq);
		completed_before = completed;
		do {
			if (started < bufs) {
				sg_init_one(&sl, dev->buf, dev->buf_size);
				r = virtqueue_add_buf(vq->vq, &sl, 1, 0,
						      dev->buf + started,
						      GFP_ATOMIC);
				if (likely(r == 0)) {
					++started;
					virtqueue_kick(vq->vq);
				}
			} else
				r = -1;

			/* Flush out completed bufs if any */
			if (virtqueue_get_buf(vq->vq, &len)) {
				++completed;
				r = 0;
			}

		} while (r == 0);
		if (completed == completed_before)
			++spurious;
		assert(completed <= bufs);
		assert(started <= bufs);
		if (completed == bufs)
			break;
		if (delayed) {
			if (virtqueue_enable_cb_delayed(vq->vq))
				wait_for_interrupt(dev);
		} else {
			if (virtqueue_enable_cb(vq->vq))
				wait_for_interrupt(dev);
		}
	}
	test = 0;
	r = ioctl(dev->control, VHOST_TEST_RUN, &test);
	assert(r >= 0);
	fprintf(stderr, "spurious wakeus: 0x%llx\n", spurious);
}

const char optstring[] = "h";
const struct option longopts[] = {
	{
		.name = "help",
		.val = 'h',
	},
	{
		.name = "event-idx",
		.val = 'E',
	},
	{
		.name = "no-event-idx",
		.val = 'e',
	},
	{
		.name = "indirect",
		.val = 'I',
	},
	{
		.name = "no-indirect",
		.val = 'i',
	},
	{
		.name = "delayed-interrupt",
		.val = 'D',
	},
	{
		.name = "no-delayed-interrupt",
		.val = 'd',
	},
	{
	}
};

static void help(void)
{
	fprintf(stderr, "Usage: virtio_test [--help]"
		" [--no-indirect]"
		" [--no-event-idx]"
		" [--delayed-interrupt]"
		"\n");
}

int main(int argc, char **argv)
{
	struct vdev_info dev;
	unsigned long long features = (1ULL << VIRTIO_RING_F_INDIRECT_DESC) |
		(1ULL << VIRTIO_RING_F_EVENT_IDX);
	int o;
	bool delayed = false;

	for (;;) {
		o = getopt_long(argc, argv, optstring, longopts, NULL);
		switch (o) {
		case -1:
			goto done;
		case '?':
			help();
			exit(2);
		case 'e':
			features &= ~(1ULL << VIRTIO_RING_F_EVENT_IDX);
			break;
		case 'h':
			help();
			goto done;
		case 'i':
			features &= ~(1ULL << VIRTIO_RING_F_INDIRECT_DESC);
			break;
		case 'D':
			delayed = true;
			break;
		default:
			assert(0);
			break;
		}
	}

done:
	vdev_info_init(&dev, features);
	vq_info_add(&dev, 256);
	run_test(&dev, &dev.vqs[0], delayed, 0x100000);
	return 0;
}
Commit	Line	Data
4e53f78e MT	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
	18	struct vq_info {
	19	int kick;
	20	int call;
	21	int num;
	22	int idx;
	23	void *ring;
	24	/* copy used for control */
	25	struct vring vring;
	26	struct virtqueue *vq;
	27	};
	28
	29	struct 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
	40	void 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
	49	void vq_callback(struct virtqueue *vq)
	50	{
	51	}
	52
	53
	54	void 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
84	static 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);
73640c99 MT	95	info->vq = vring_new_virtqueue(info->idx,
73640c99 MT	96	info->vring.num, 4096, &dev->vdev,
7b21e34f	97	true, info->ring,
4e53f78e MT	98	vq_notify, vq_callback, "test");
	99	assert(info->vq);
	100	info->vq->priv = info;
	101	vhost_vq_setup(dev, info);
	102	dev->fds[info->idx].fd = info->call;
	103	dev->fds[info->idx].events = POLLIN;
	104	dev->nvqs++;
	105	}
	106
	107	static void vdev_info_init(struct vdev_info* dev, unsigned long long features)
	108	{
	109	int r;
	110	memset(dev, 0, sizeof *dev);
	111	dev->vdev.features[0] = features;
	112	dev->vdev.features[1] = features >> 32;
	113	dev->buf_size = 1024;
	114	dev->buf = malloc(dev->buf_size);
	115	assert(dev->buf);
	116	dev->control = open("/dev/vhost-test", O_RDWR);
	117	assert(dev->control >= 0);
	118	r = ioctl(dev->control, VHOST_SET_OWNER, NULL);
	119	assert(r >= 0);
	120	dev->mem = malloc(offsetof(struct vhost_memory, regions) +
	121	sizeof dev->mem->regions[0]);
	122	assert(dev->mem);
	123	memset(dev->mem, 0, offsetof(struct vhost_memory, regions) +
	124	sizeof dev->mem->regions[0]);
	125	dev->mem->nregions = 1;
	126	dev->mem->regions[0].guest_phys_addr = (long)dev->buf;
	127	dev->mem->regions[0].userspace_addr = (long)dev->buf;
	128	dev->mem->regions[0].memory_size = dev->buf_size;
	129	r = ioctl(dev->control, VHOST_SET_MEM_TABLE, dev->mem);
	130	assert(r >= 0);
	131	}
	132
	133	/* TODO: this is pretty bad: we get a cache line bounce
	134	* for the wait queue on poll and another one on read,
	135	* plus the read which is there just to clear the
	136	* current state. */
	137	static void wait_for_interrupt(struct vdev_info *dev)
	138	{
	139	int i;
	140	unsigned long long val;
	141	poll(dev->fds, dev->nvqs, -1);
	142	for (i = 0; i < dev->nvqs; ++i)
	143	if (dev->fds[i].revents & POLLIN) {
	144	read(dev->fds[i].fd, &val, sizeof val);
	145	}
	146	}
	147
64d09888 MT	148	static void run_test(struct vdev_info dev, struct vq_info vq,
64d09888 MT	149	bool delayed, int bufs)
4e53f78e MT	150	{
	151	struct scatterlist sl;
	152	long started = 0, completed = 0;
	153	long completed_before;
	154	int r, test = 1;
	155	unsigned len;
	156	long long spurious = 0;
	157	r = ioctl(dev->control, VHOST_TEST_RUN, &test);
	158	assert(r >= 0);
	159	for (;;) {
	160	virtqueue_disable_cb(vq->vq);
	161	completed_before = completed;
	162	do {
	163	if (started < bufs) {
	164	sg_init_one(&sl, dev->buf, dev->buf_size);
	165	r = virtqueue_add_buf(vq->vq, &sl, 1, 0,
f96fde41 RR	166	dev->buf + started,
f96fde41 RR	167	GFP_ATOMIC);
de929b04	168	if (likely(r == 0)) {
4e53f78e MT	169	++started;
	170	virtqueue_kick(vq->vq);
	171	}
	172	} else
	173	r = -1;
	174
	175	/* Flush out completed bufs if any */
	176	if (virtqueue_get_buf(vq->vq, &len)) {
	177	++completed;
	178	r = 0;
	179	}
	180
de929b04	181	} while (r == 0);
4e53f78e MT	182	if (completed == completed_before)
	183	++spurious;
	184	assert(completed <= bufs);
	185	assert(started <= bufs);
	186	if (completed == bufs)
	187	break;
64d09888 MT	188	if (delayed) {
	189	if (virtqueue_enable_cb_delayed(vq->vq))
	190	wait_for_interrupt(dev);
	191	} else {
	192	if (virtqueue_enable_cb(vq->vq))
	193	wait_for_interrupt(dev);
4e53f78e MT	194	}
	195	}
	196	test = 0;
	197	r = ioctl(dev->control, VHOST_TEST_RUN, &test);
	198	assert(r >= 0);
	199	fprintf(stderr, "spurious wakeus: 0x%llx\n", spurious);
	200	}
	201
	202	const char optstring[] = "h";
	203	const struct option longopts[] = {
	204	{
	205	.name = "help",
	206	.val = 'h',
	207	},
4423fe40 MT	208	{
	209	.name = "event-idx",
	210	.val = 'E',
	211	},
	212	{
	213	.name = "no-event-idx",
	214	.val = 'e',
	215	},
4e53f78e MT	216	{
	217	.name = "indirect",
	218	.val = 'I',
	219	},
	220	{
	221	.name = "no-indirect",
	222	.val = 'i',
	223	},
64d09888 MT	224	{
	225	.name = "delayed-interrupt",
	226	.val = 'D',
	227	},
	228	{
	229	.name = "no-delayed-interrupt",
	230	.val = 'd',
	231	},
4e53f78e MT	232	{
	233	}
	234	};
	235
4a7d6455	236	static void help(void)
4e53f78e	237	{
4423fe40 MT	238	fprintf(stderr, "Usage: virtio_test [--help]"
	239	" [--no-indirect]"
	240	" [--no-event-idx]"
64d09888	241	" [--delayed-interrupt]"
4423fe40	242	"\n");
4e53f78e MT	243	}
	244
	245	int main(int argc, char **argv)
	246	{
	247	struct vdev_info dev;
4423fe40 MT	248	unsigned long long features = (1ULL << VIRTIO_RING_F_INDIRECT_DESC) \|
4423fe40 MT	249	(1ULL << VIRTIO_RING_F_EVENT_IDX);
4e53f78e	250	int o;
64d09888	251	bool delayed = false;
4e53f78e MT	252
	253	for (;;) {
	254	o = getopt_long(argc, argv, optstring, longopts, NULL);
	255	switch (o) {
	256	case -1:
	257	goto done;
	258	case '?':
	259	help();
	260	exit(2);
4423fe40 MT	261	case 'e':
	262	features &= ~(1ULL << VIRTIO_RING_F_EVENT_IDX);
	263	break;
4e53f78e MT	264	case 'h':
	265	help();
	266	goto done;
	267	case 'i':
	268	features &= ~(1ULL << VIRTIO_RING_F_INDIRECT_DESC);
	269	break;
64d09888 MT	270	case 'D':
	271	delayed = true;
	272	break;
4e53f78e MT	273	default:
	274	assert(0);
	275	break;
	276	}
	277	}
	278
	279	done:
	280	vdev_info_init(&dev, features);
	281	vq_info_add(&dev, 256);
64d09888	282	run_test(&dev, &dev.vqs[0], delayed, 0x100000);
4e53f78e MT	283	return 0;
4e53f78e MT	284	}