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author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-06 12:30:19 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-06 12:30:19 -0800 |
commit | abb359450f20c32ae03039d8736f12b1d561caf5 (patch) | |
tree | 6e8723885feb66a138f19f0ff31615dc13a8d859 /tools/virtio/virtio_test.c | |
parent | cb600d2f83c854ec3d6660063e4466431999489b (diff) | |
parent | 4e3dbdb1392a83bd21a6ff8f6bc785495058d37c (diff) | |
download | kernel_samsung_smdk4412-abb359450f20c32ae03039d8736f12b1d561caf5.zip kernel_samsung_smdk4412-abb359450f20c32ae03039d8736f12b1d561caf5.tar.gz kernel_samsung_smdk4412-abb359450f20c32ae03039d8736f12b1d561caf5.tar.bz2 |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1436 commits)
cassini: Use local-mac-address prom property for Cassini MAC address
net: remove the duplicate #ifdef __KERNEL__
net: bridge: check the length of skb after nf_bridge_maybe_copy_header()
netconsole: clarify stopping message
netconsole: don't announce stopping if nothing happened
cnic: Fix the type field in SPQ messages
netfilter: fix export secctx error handling
netfilter: fix the race when initializing nf_ct_expect_hash_rnd
ipv4: IP defragmentation must be ECN aware
net: r6040: Return proper error for r6040_init_one
dcb: use after free in dcb_flushapp()
dcb: unlock on error in dcbnl_ieee_get()
net: ixp4xx_eth: Return proper error for eth_init_one
include/linux/if_ether.h: Add #define ETH_P_LINK_CTL for HPNA and wlan local tunnel
net: add POLLPRI to sock_def_readable()
af_unix: Avoid socket->sk NULL OOPS in stream connect security hooks.
net_sched: pfifo_head_drop problem
mac80211: remove stray extern
mac80211: implement off-channel TX using hw r-o-c offload
mac80211: implement hardware offload for remain-on-channel
...
Diffstat (limited to 'tools/virtio/virtio_test.c')
-rw-r--r-- | tools/virtio/virtio_test.c | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/tools/virtio/virtio_test.c b/tools/virtio/virtio_test.c new file mode 100644 index 0000000..df0c6d2 --- /dev/null +++ b/tools/virtio/virtio_test.c @@ -0,0 +1,248 @@ +#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->vring.num, 4096, &dev->vdev, 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, 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); + 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 (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 = "indirect", + .val = 'I', + }, + { + .name = "no-indirect", + .val = 'i', + }, + { + } +}; + +static void help() +{ + fprintf(stderr, "Usage: virtio_test [--help] [--no-indirect]\n"); +} + +int main(int argc, char **argv) +{ + struct vdev_info dev; + unsigned long long features = 1ULL << VIRTIO_RING_F_INDIRECT_DESC; + int o; + + for (;;) { + o = getopt_long(argc, argv, optstring, longopts, NULL); + switch (o) { + case -1: + goto done; + case '?': + help(); + exit(2); + case 'h': + help(); + goto done; + case 'i': + features &= ~(1ULL << VIRTIO_RING_F_INDIRECT_DESC); + break; + default: + assert(0); + break; + } + } + +done: + vdev_info_init(&dev, features); + vq_info_add(&dev, 256); + run_test(&dev, &dev.vqs[0], 0x100000); + return 0; +} |