[GitHub/mt8127/android_kernel_alcatel_ttab.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 <stdbool.h>
#include <linux/vhost.h>
#include <linux/virtio.h>
#include <linux/virtio_ring.h>
#include "../../drivers/vhost/test.h"

/* Unused */
void *__kmalloc_fake, *__kfree_ignore_start, *__kfree_ignore_end;

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_outbuf(vq->vq, &sl, 1,
							 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>
61d0b5a4	13	#include <stdbool.h>
4e53f78e MT	14	#include <linux/vhost.h>
	15	#include <linux/virtio.h>
	16	#include <linux/virtio_ring.h>
	17	#include "../../drivers/vhost/test.h"
	18
61d0b5a4 RR	19	/* Unused */
	20	void __kmalloc_fake, __kfree_ignore_start, *__kfree_ignore_end;
	21
4e53f78e MT	22	struct 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
	33	struct 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
	44	void 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	}
	52
	53	void vq_callback(struct virtqueue *vq)
	54	{
	55	}
	56
	57
	58	void vhost_vq_setup(struct vdev_info dev, struct vq_info info)
	59	{
	60	struct vhost_vring_state state = { .index = info->idx };
	61	struct vhost_vring_file file = { .index = info->idx };
	62	unsigned long long features = dev->vdev.features[0];
	63	struct vhost_vring_addr addr = {
	64	.index = info->idx,
	65	.desc_user_addr = (uint64_t)(unsigned long)info->vring.desc,
	66	.avail_user_addr = (uint64_t)(unsigned long)info->vring.avail,
	67	.used_user_addr = (uint64_t)(unsigned long)info->vring.used,
	68	};
	69	int r;
	70	r = ioctl(dev->control, VHOST_SET_FEATURES, &features);
	71	assert(r >= 0);
	72	state.num = info->vring.num;
	73	r = ioctl(dev->control, VHOST_SET_VRING_NUM, &state);
	74	assert(r >= 0);
	75	state.num = 0;
	76	r = ioctl(dev->control, VHOST_SET_VRING_BASE, &state);
	77	assert(r >= 0);
	78	r = ioctl(dev->control, VHOST_SET_VRING_ADDR, &addr);
	79	assert(r >= 0);
	80	file.fd = info->kick;
	81	r = ioctl(dev->control, VHOST_SET_VRING_KICK, &file);
	82	assert(r >= 0);
	83	file.fd = info->call;
	84	r = ioctl(dev->control, VHOST_SET_VRING_CALL, &file);
	85	assert(r >= 0);
86	}
87
88	static void vq_info_add(struct vdev_info *dev, int num)
89	{
90	struct vq_info *info = &dev->vqs[dev->nvqs];
91	int r;
92	info->idx = dev->nvqs;
93	info->kick = eventfd(0, EFD_NONBLOCK);
94	info->call = eventfd(0, EFD_NONBLOCK);
95	r = posix_memalign(&info->ring, 4096, vring_size(num, 4096));
96	assert(r >= 0);
97	memset(info->ring, 0, vring_size(num, 4096));
98	vring_init(&info->vring, num, info->ring, 4096);
73640c99 MT	99	info->vq = vring_new_virtqueue(info->idx,
73640c99 MT	100	info->vring.num, 4096, &dev->vdev,
7b21e34f	101	true, info->ring,
4e53f78e MT	102	vq_notify, vq_callback, "test");
	103	assert(info->vq);
	104	info->vq->priv = info;
	105	vhost_vq_setup(dev, info);
	106	dev->fds[info->idx].fd = info->call;
	107	dev->fds[info->idx].events = POLLIN;
	108	dev->nvqs++;
	109	}
	110
	111	static void vdev_info_init(struct vdev_info* dev, unsigned long long features)
	112	{
	113	int r;
	114	memset(dev, 0, sizeof *dev);
	115	dev->vdev.features[0] = features;
	116	dev->vdev.features[1] = features >> 32;
	117	dev->buf_size = 1024;
	118	dev->buf = malloc(dev->buf_size);
	119	assert(dev->buf);
	120	dev->control = open("/dev/vhost-test", O_RDWR);
	121	assert(dev->control >= 0);
	122	r = ioctl(dev->control, VHOST_SET_OWNER, NULL);
	123	assert(r >= 0);
	124	dev->mem = malloc(offsetof(struct vhost_memory, regions) +
	125	sizeof dev->mem->regions[0]);
	126	assert(dev->mem);
	127	memset(dev->mem, 0, offsetof(struct vhost_memory, regions) +
	128	sizeof dev->mem->regions[0]);
	129	dev->mem->nregions = 1;
	130	dev->mem->regions[0].guest_phys_addr = (long)dev->buf;
	131	dev->mem->regions[0].userspace_addr = (long)dev->buf;
	132	dev->mem->regions[0].memory_size = dev->buf_size;
	133	r = ioctl(dev->control, VHOST_SET_MEM_TABLE, dev->mem);
	134	assert(r >= 0);
	135	}
	136
	137	/* TODO: this is pretty bad: we get a cache line bounce
	138	* for the wait queue on poll and another one on read,
	139	* plus the read which is there just to clear the
	140	* current state. */
	141	static void wait_for_interrupt(struct vdev_info *dev)
	142	{
	143	int i;
	144	unsigned long long val;
	145	poll(dev->fds, dev->nvqs, -1);
	146	for (i = 0; i < dev->nvqs; ++i)
	147	if (dev->fds[i].revents & POLLIN) {
	148	read(dev->fds[i].fd, &val, sizeof val);
	149	}
	150	}
	151
64d09888 MT	152	static void run_test(struct vdev_info dev, struct vq_info vq,
64d09888 MT	153	bool delayed, int bufs)
4e53f78e MT	154	{
	155	struct scatterlist sl;
	156	long started = 0, completed = 0;
	157	long completed_before;
	158	int r, test = 1;
	159	unsigned len;
	160	long long spurious = 0;
	161	r = ioctl(dev->control, VHOST_TEST_RUN, &test);
	162	assert(r >= 0);
	163	for (;;) {
	164	virtqueue_disable_cb(vq->vq);
	165	completed_before = completed;
	166	do {
	167	if (started < bufs) {
	168	sg_init_one(&sl, dev->buf, dev->buf_size);
cf994e0a RR	169	r = virtqueue_add_outbuf(vq->vq, &sl, 1,
	170	dev->buf + started,
	171	GFP_ATOMIC);
de929b04	172	if (likely(r == 0)) {
4e53f78e MT	173	++started;
	174	virtqueue_kick(vq->vq);
	175	}
	176	} else
	177	r = -1;
	178
	179	/* Flush out completed bufs if any */
	180	if (virtqueue_get_buf(vq->vq, &len)) {
	181	++completed;
	182	r = 0;
	183	}
	184
de929b04	185	} while (r == 0);
4e53f78e MT	186	if (completed == completed_before)
	187	++spurious;
	188	assert(completed <= bufs);
	189	assert(started <= bufs);
	190	if (completed == bufs)
	191	break;
64d09888 MT	192	if (delayed) {
	193	if (virtqueue_enable_cb_delayed(vq->vq))
	194	wait_for_interrupt(dev);
	195	} else {
	196	if (virtqueue_enable_cb(vq->vq))
	197	wait_for_interrupt(dev);
4e53f78e MT	198	}
	199	}
	200	test = 0;
	201	r = ioctl(dev->control, VHOST_TEST_RUN, &test);
	202	assert(r >= 0);
	203	fprintf(stderr, "spurious wakeus: 0x%llx\n", spurious);
	204	}
	205
	206	const char optstring[] = "h";
	207	const struct option longopts[] = {
	208	{
	209	.name = "help",
	210	.val = 'h',
	211	},
4423fe40 MT	212	{
	213	.name = "event-idx",
	214	.val = 'E',
	215	},
	216	{
	217	.name = "no-event-idx",
	218	.val = 'e',
	219	},
4e53f78e MT	220	{
	221	.name = "indirect",
	222	.val = 'I',
	223	},
	224	{
	225	.name = "no-indirect",
	226	.val = 'i',
	227	},
64d09888 MT	228	{
	229	.name = "delayed-interrupt",
	230	.val = 'D',
	231	},
	232	{
	233	.name = "no-delayed-interrupt",
	234	.val = 'd',
	235	},
4e53f78e MT	236	{
	237	}
	238	};
	239
4a7d6455	240	static void help(void)
4e53f78e	241	{
4423fe40 MT	242	fprintf(stderr, "Usage: virtio_test [--help]"
	243	" [--no-indirect]"
	244	" [--no-event-idx]"
64d09888	245	" [--delayed-interrupt]"
4423fe40	246	"\n");
4e53f78e MT	247	}
	248
	249	int main(int argc, char **argv)
	250	{
	251	struct vdev_info dev;
4423fe40 MT	252	unsigned long long features = (1ULL << VIRTIO_RING_F_INDIRECT_DESC) \|
4423fe40 MT	253	(1ULL << VIRTIO_RING_F_EVENT_IDX);
4e53f78e	254	int o;
64d09888	255	bool delayed = false;
4e53f78e MT	256
	257	for (;;) {
	258	o = getopt_long(argc, argv, optstring, longopts, NULL);
	259	switch (o) {
	260	case -1:
	261	goto done;
	262	case '?':
	263	help();
	264	exit(2);
4423fe40 MT	265	case 'e':
	266	features &= ~(1ULL << VIRTIO_RING_F_EVENT_IDX);
	267	break;
4e53f78e MT	268	case 'h':
	269	help();
	270	goto done;
	271	case 'i':
	272	features &= ~(1ULL << VIRTIO_RING_F_INDIRECT_DESC);
	273	break;
64d09888 MT	274	case 'D':
	275	delayed = true;
	276	break;
4e53f78e MT	277	default:
	278	assert(0);
	279	break;
	280	}
	281	}
	282
	283	done:
	284	vdev_info_init(&dev, features);
	285	vq_info_add(&dev, 256);
64d09888	286	run_test(&dev, &dev.vqs[0], delayed, 0x100000);
4e53f78e MT	287	return 0;
4e53f78e MT	288	}