/*
 * Userspace mediated device sample application
 *
 * 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 */

#include <stdio.h>

#include "../lib/muser.h"

ssize_t
bar2_access(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;
}

int main(int argc, char **argv)
{
    lm_dev_info_t dev_info = {
        .pci_info = {
            .id = {.vid = 0x494F, .did = 0x0DC8 },
            .reg_info[LM_DEV_BAR2_REG_IDX] = {
                .flags = LM_REG_FLAG_RW,
                .size = 0x100,
                .fn = &bar2_access
            },
            .irq_count[LM_DEV_INTX_IRQ_IDX] = 1,
        },
        .uuid = argv[1],
    };

    return lm_ctx_run(&dev_info);
}

/* ex: set tabstop=4 shiftwidth=4 softtabstop=4 expandtab: */