trio.c

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/*
 * Copyright 2012 Tilera Corporation. All Rights Reserved.
 *
 *   This program is free software; you can redistribute it and/or
 *   modify it under the terms of the GNU General Public License
 *   as published by the Free Software Foundation, version 2.
 *
 *   This program is distributed in the hope that it will be useful, but
 *   WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
 *   NON INFRINGEMENT.  See the GNU General Public License for
 *   more details.
 */

/*
 * Implementation of trio gxio calls.
 */

#include <linux/errno.h>
#include <linux/io.h>
#include <linux/module.h>

#include <gxio/trio.h>
#include <gxio/iorpc_globals.h>
#include <gxio/iorpc_trio.h>
#include <gxio/kiorpc.h>

int gxio_trio_init(gxio_trio_context_t *context, unsigned int trio_index)
{
    char file[32];
    int fd;

    snprintf(file, sizeof(file), "trio/%d/iorpc", trio_index);
    fd = hv_dev_open((HV_VirtAddr) file, 0);
    if (fd < 0) {
        context->fd = -1;

        if (fd >= GXIO_ERR_MIN && fd <= GXIO_ERR_MAX)
            return fd;
        else
            return -ENODEV;
    }

    context->fd = fd;

    return 0;
}

EXPORT_SYMBOL_GPL(gxio_trio_init);