/**
* Simulate a Netmap NIOCRXSYNC ioctl:
*/
static int
ioctl_niocrxsync(int fd)
{
uint32_t idx, port;
idx = FD_TO_IDX(fd);
if ((port = fd_port[idx].port) < RTE_DIM(ports) &&
ports[port].fd == idx) {
return (rx_sync_if(fd_port[idx].port));
} else {
return (-EINVAL);
}
}
/**
* Doesn't support timeout other than 0 or infinite (negative) timeout
*/
int
rte_netmap_poll(struct pollfd *fds, nfds_t nfds, int timeout)
{
int32_t count_it, ret;
uint32_t i, idx, port;
uint32_t want_rx, want_tx;
if (timeout > 0)
return -1;
ret = 0;
do {
for (i = 0; i < nfds; i++) {
count_it = 0;
if (!FD_VALID(fds[i].fd) || fds[i].events == 0) {
fds[i].revents = 0;
continue;
}
idx = FD_TO_IDX(fds[i].fd);
if ((port = fd_port[idx].port) >= RTE_DIM(ports) ||
ports[port].fd != idx) {
fds[i].revents |= POLLERR;
ret++;
continue;
}
want_rx = fds[i].events & (POLLIN | POLLRDNORM);
want_tx = fds[i].events & (POLLOUT | POLLWRNORM);
if (want_rx && rx_sync_if(port) > 0) {
fds[i].revents = (uint16_t)
(fds[i].revents | want_rx);
count_it = 1;
}
if (want_tx && tx_sync_if(port) > 0) {
fds[i].revents = (uint16_t)
(fds[i].revents | want_tx);
count_it = 1;
}
ret += count_it;
}
}
while ((ret == 0 && timeout < 0) || timeout);
return ret;
}