source: mainline/uspace/drv/test/test3/test3.c

/*
 * Copyright (c) 2011 Vojtech Horky
 * All rights reserved.
 *
 * 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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.
 */

/** @file
 */

#include <assert.h>
#include <stdio.h>
#include <errno.h>
#include <str_error.h>
#include <ddf/driver.h>
#include <ddf/log.h>

#define NAME "test3"

#define NUM_FUNCS 20

static errno_t test3_dev_add(ddf_dev_t *dev);
static errno_t test3_dev_remove(ddf_dev_t *dev);
static errno_t test3_fun_online(ddf_fun_t *fun);
static errno_t test3_fun_offline(ddf_fun_t *fun);

static driver_ops_t driver_ops = {
        .dev_add = &test3_dev_add,
        .dev_remove = &test3_dev_remove,
        .fun_online = &test3_fun_online,
        .fun_offline = &test3_fun_offline,
};

static driver_t test3_driver = {
        .name = NAME,
        .driver_ops = &driver_ops
};

typedef struct {
        ddf_dev_t *dev;
        ddf_fun_t *fun[NUM_FUNCS];
} test3_t;

static errno_t register_fun_and_add_to_category(ddf_dev_t *parent,
    const char *base_name, size_t index, const char *class_name,
    ddf_fun_t **pfun)
{
        ddf_fun_t *fun = NULL;
        errno_t rc;
        char *fun_name = NULL;
        bool bound = false;

        if (asprintf(&fun_name, "%s%zu", base_name, index) < 0) {
                ddf_msg(LVL_ERROR, "Failed to format string: No memory");
                rc = ENOMEM;
                goto leave;
        }

        fun = ddf_fun_create(parent, fun_exposed, fun_name);
        if (fun == NULL) {
                ddf_msg(LVL_ERROR, "Failed creating function %s", fun_name);
                rc = ENOMEM;
                goto leave;
        }

        rc = ddf_fun_bind(fun);
        if (rc != EOK) {
                ddf_msg(LVL_ERROR, "Failed binding function %s: %s", fun_name,
                    str_error(rc));
                goto leave;
        }

        bound = true;

        rc = ddf_fun_add_to_category(fun, class_name);
        if (rc != EOK) {
                ddf_msg(LVL_ERROR, "Failed addning function %s to category %s: "
                    "%s", fun_name, class_name, str_error(rc));
                goto leave;
        }

        ddf_msg(LVL_NOTE, "Registered exposed function `%s'.", fun_name);

leave:
        free(fun_name);

        if (bound)
                ddf_fun_unbind(fun);
        if ((rc != EOK) && (fun != NULL)) {
                ddf_fun_destroy(fun);
        }

        *pfun = fun;
        return rc;
}

static errno_t fun_remove(ddf_fun_t *fun, const char *name)
{
        errno_t rc;

        ddf_msg(LVL_DEBUG, "fun_remove(%p, '%s')", fun, name);
        rc = ddf_fun_offline(fun);
        if (rc != EOK) {
                ddf_msg(LVL_ERROR, "Error offlining function '%s'.", name);
                return rc;
        }

        rc = ddf_fun_unbind(fun);
        if (rc != EOK) {
                ddf_msg(LVL_ERROR, "Failed unbinding function '%s'.", name);
                return rc;
        }

        ddf_fun_destroy(fun);
        return EOK;
}

static errno_t test3_dev_add(ddf_dev_t *dev)
{
        errno_t rc = EOK;
        test3_t *test3;

        ddf_msg(LVL_DEBUG, "dev_add(name=\"%s\", handle=%d)",
            ddf_dev_get_name(dev), (int) ddf_dev_get_handle(dev));

        test3 = ddf_dev_data_alloc(dev, sizeof(test3_t));
        if (test3 == NULL) {
                ddf_msg(LVL_ERROR, "Failed allocating soft state.");
                return ENOMEM;
        }

        size_t i;
        for (i = 0; i < NUM_FUNCS; i++) {
                rc = register_fun_and_add_to_category(dev,
                    "test3_", i, "test3", &test3->fun[i]);
                if (rc != EOK) {
                        break;
                }
        }

        return rc;
}

static errno_t test3_dev_remove(ddf_dev_t *dev)
{
        test3_t *test3 = (test3_t *)ddf_dev_data_get(dev);
        char *fun_name;
        errno_t rc;
        size_t i;

        for (i = 0; i < NUM_FUNCS; i++) {
                if (asprintf(&fun_name, "test3_%zu", i) < 0) {
                        ddf_msg(LVL_ERROR, "Failed to format string: No memory");
                        return ENOMEM;
                }

                rc = fun_remove(test3->fun[i], fun_name);
                if (rc != EOK)
                        return rc;

                free(fun_name);
        }

        return EOK;
}

static errno_t test3_fun_online(ddf_fun_t *fun)
{
        ddf_msg(LVL_DEBUG, "test3_fun_online()");
        return ddf_fun_online(fun);
}

static errno_t test3_fun_offline(ddf_fun_t *fun)
{
        ddf_msg(LVL_DEBUG, "test3_fun_offline()");
        return ddf_fun_offline(fun);
}

int main(int argc, char *argv[])
{
        printf(NAME ": HelenOS test3 virtual device driver\n");
        ddf_log_init(NAME);
        return ddf_driver_main(&test3_driver);
}