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/*
* Copyright (c) 2019, Nutanix Inc. All rights reserved.
* Author: Thanos Makatos <thanos@nutanix.com>
* Swapnil Ingle <swapnil.ingle@nutanix.com>
* Felipe Franciosi <felipe@nutanix.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Nutanix nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
*/
/*
* gpio-pci-idio-16: a simple example server identifying as a GPIO PCI device.
*/
#include <stdio.h>
#include <err.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#include <errno.h>
#include "common.h"
#include "libvfio-user.h"
#include "tran_sock.h"
static void
_log(UNUSED void *pvt, UNUSED vfu_log_lvl_t lvl, char const *msg)
{
fprintf(stderr, "gpio: %s\n", msg);
}
ssize_t
bar2_access(UNUSED void *pvt, char * const buf, size_t count, loff_t offset,
const bool is_write)
{
static char n;
if (offset == 0 && !is_write)
buf[0] = n++ / 3;
return count;
}
static void _sa_handler(UNUSED int signum)
{
}
int
main(int argc, char *argv[])
{
int ret;
bool verbose = false;
char opt;
struct sigaction act = { .sa_handler = _sa_handler };
vfu_ctx_t *vfu_ctx;
vfu_pci_hdr_id_t id = { .vid = 0x494F, .did = 0x0DC8 };
vfu_pci_hdr_ss_t ss = { .vid = 0x0, .sid = 0x0 };
vfu_pci_hdr_cc_t cc = { { 0 } };
while ((opt = getopt(argc, argv, "v")) != -1) {
switch (opt) {
case 'v':
verbose = true;
break;
default: /* '?' */
fprintf(stderr, "Usage: %s [-v] <socketpath>\n", argv[0]);
exit(EXIT_FAILURE);
}
}
if (optind >= argc) {
errx(EXIT_FAILURE, "missing vfio-user socket path");
}
sigemptyset(&act.sa_mask);
if (sigaction(SIGINT, &act, NULL) == -1) {
err(EXIT_FAILURE, "failed to register signal handler");
}
vfu_ctx = vfu_create_ctx(VFU_TRANS_SOCK, argv[optind], 0, NULL);
if (vfu_ctx == NULL) {
if (errno == EINTR) {
printf("interrupted\n");
exit(EXIT_SUCCESS);
}
err(EXIT_FAILURE, "failed to initialize device emulation");
}
ret = vfu_setup_log(vfu_ctx, _log, verbose ? VFU_DBG : VFU_ERR);
if (ret < 0) {
err(EXIT_FAILURE, "failed to setup log");
}
ret = vfu_pci_setup_config_hdr(vfu_ctx, id, ss, cc, false);
if (ret < 0) {
fprintf(stderr, "failed to setup pci header\n");
goto out;
}
ret = vfu_setup_region(vfu_ctx, VFU_PCI_DEV_BAR2_REGION_IDX, 0x100,
&bar2_access, VFU_REG_FLAG_RW, NULL, 0, NULL);
if (ret < 0) {
fprintf(stderr, "failed to setup region\n");
goto out;
}
ret = vfu_ctx_drive(vfu_ctx);
if (ret != 0) {
if (ret != -ENOTCONN && ret != -EINTR) {
fprintf(stderr, "failed to realize device emulation\n");
goto out;
}
ret = 0;
}
out:
vfu_destroy_ctx(vfu_ctx);
return ret;
}
/* ex: set tabstop=4 shiftwidth=4 softtabstop=4 expandtab: */
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