HelenOS sources

root/uspace/app/pci/pci.c

DEFINITIONS

1. main
2. syntax_print
3. pci_list
4. pci_list_bridge
5. pci_list_bridge_id

/*
 * Copyright (c) 2019 Jiri Svoboda
 * 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.
 */

/** @addtogroup pci
 * @{
 */

/**
 * @file
 * @brief Tool for listing PCI devices.
 */

#include <devman.h>
#include <errno.h>
#include <io/table.h>
#include <loc.h>
#include <pci.h>
#include <stdio.h>
#include <stdlib.h>
#include <str.h>

#define NAME    "mkext4"

#define MAX_NAME_LENGTH 1024

static void syntax_print(void);
static errno_t pci_list(void);
static errno_t pci_list_bridge(const char *);
static errno_t pci_list_bridge_id(service_id_t);

int main(int argc, char **argv)
{
        errno_t rc;
        const char *bridge = NULL;

        --argc;
        ++argv;

        while (argc > 0 && argv[0][0] == '-') {
                if (str_cmp(argv[0], "--bridge") == 0) {
                        --argc;
                        ++argv;
                        if (argc < 1) {
                                printf("Option argument missing.\n");
                                return 1;
                        }

                        bridge = argv[0];
                        --argc;
                        ++argv;
                } else {
                        syntax_print();
                        return 1;
                }
        }

        if (argc != 0) {
                syntax_print();
                return 1;
        }

        if (bridge != NULL)
                rc = pci_list_bridge(bridge);
        else
                rc = pci_list();

        if (rc != EOK)
                return 1;

        return 0;
}

static void syntax_print(void)
{
        printf("syntax: pci [<options>]\n");
        printf("options:\n"
            "\t--bridge <svc-name> Only devices under host bridge <svc-name>\n");
}

/** List PCI devices. */
static errno_t pci_list(void)
{
        errno_t rc;
        category_id_t pci_cat_id;
        service_id_t *svc_ids = NULL;
        size_t svc_cnt;
        size_t i;

        rc = loc_category_get_id("pci", &pci_cat_id, 0);
        if (rc != EOK) {
                printf("Error getting 'pci' category ID.\n");
                goto error;
        }

        rc = loc_category_get_svcs(pci_cat_id, &svc_ids, &svc_cnt);
        if (rc != EOK) {
                printf("Error getting list of PCI services.\n");
                goto error;
        }

        for (i = 0; i < svc_cnt; i++) {
                if (i > 0)
                        putchar('\n');

                rc = pci_list_bridge_id(svc_ids[i]);
                if (rc != EOK)
                        goto error;
        }

        free(svc_ids);
        return EOK;
error:
        if (svc_ids != NULL)
                free(svc_ids);
        return rc;
}

/** List PCI devices under a host bridge specified by name.
 *
 * @param svc_name PCI service name
 * @return EOK on success or an error code
 */
static errno_t pci_list_bridge(const char *svc_name)
{
        errno_t rc;
        service_id_t svc_id;

        rc = loc_service_get_id(svc_name, &svc_id, 0);
        if (rc != EOK) {
                printf("Error looking up host bridge '%s'.\n", svc_name);
                return rc;
        }

        return pci_list_bridge_id(svc_id);
}

/** List PCI devices under a host bridge specified by ID.
 *
 * @param svc_id PCI service ID
 * @return EOK on success or an error code
 */
static errno_t pci_list_bridge_id(service_id_t svc_id)
{
        errno_t rc;
        devman_handle_t *dev_ids = NULL;
        size_t dev_cnt;
        pci_dev_info_t dev_info;
        size_t i;
        pci_t *pci = NULL;
        char *svc_name = NULL;
        char *drv_name = NULL;
        table_t *table = NULL;

        drv_name = malloc(MAX_NAME_LENGTH);
        if (drv_name == NULL) {
                printf("Out of memory.\n");
                rc = ENOMEM;
                goto error;
        }

        rc = table_create(&table);
        if (rc != EOK) {
                printf("Out of memory.\n");
                rc = ENOMEM;
                goto error;
        }

        table_header_row(table);
        table_printf(table, "Address\t" "Type\t" "Driver\n");

        rc = loc_service_get_name(svc_id, &svc_name);
        if (rc != EOK) {
                printf("Error getting service name.\n");
                goto error;
        }

        rc = pci_open(svc_id, &pci);
        if (rc != EOK) {
                printf("Error opening PCI service '%s'.\n", svc_name);
                goto error;
        }

        rc = pci_get_devices(pci, &dev_ids, &dev_cnt);
        if (rc != EOK) {
                printf("Error getting PCI device list.\n");
                goto error;
        }

        for (i = 0; i < dev_cnt; i++) {
                rc = pci_dev_get_info(pci, dev_ids[i], &dev_info);
                if (rc != EOK) {
                        printf("Error getting PCI device info.\n");
                        goto error;
                }

                rc = devman_fun_get_driver_name(dev_info.dev_handle,
                    drv_name, MAX_NAME_LENGTH);
                if (rc != EOK && rc != EINVAL) {
                        printf("Error getting driver name.\n");
                        goto error;
                }

                if (rc == EINVAL)
                        drv_name[0] = '\0';

                table_printf(table, "%02x.%02x.%x\t" "%04x:%04x\t"
                    "%s\n", dev_info.bus_num, dev_info.dev_num,
                    dev_info.fn_num, dev_info.vendor_id,
                    dev_info.device_id, drv_name);
        }

        printf("Device listing for host bridge %s:\n\n", svc_name);
        rc = table_print_out(table, stdout);
        if (rc != EOK) {
                printf("Error printing table.\n");
                goto error;
        }

        table_destroy(table);
        table = NULL;
        free(dev_ids);
        dev_ids = NULL;
        pci_close(pci);
        pci = NULL;
        free(svc_name);
        svc_name = NULL;

        free(drv_name);
        return EOK;
error:
        if (drv_name != NULL)
                free(drv_name);
        if (table != NULL)
                table_destroy(table);
        if (pci != NULL)
                pci_close(pci);
        if (svc_name != NULL)
                free(svc_name);
        if (dev_ids != NULL)
                free(dev_ids);
        return rc;
}

/**
 * @}
 */