linux-imx

// SPDX-License-Identifier: GPL-2.0+

/*

 * IBM Hot Plug Controller Driver

 *

 * Written By: Irene Zubarev, IBM Corporation

 *

 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)

 * Copyright (C) 2001,2002 IBM Corp.

 *

 * All rights reserved.

 *

 * Send feedback to <gregkh@us.ibm.com>

 *

 */

​

#include <linux/module.h>

#include <linux/slab.h>

#include <linux/pci.h>

#include <linux/list.h>

#include <linux/init.h>

#include "ibmphp.h"

​

static int flags = 0;       /* for testing */

​

static void update_resources(struct bus_node *bus_cur, int type, int rangeno);

static int once_over(void);

static int remove_ranges(struct bus_node *, struct bus_node *);

static int update_bridge_ranges(struct bus_node **);

static int add_bus_range(int type, struct range_node *, struct bus_node *);

static void fix_resources(struct bus_node *);

static struct bus_node *find_bus_wprev(u8, struct bus_node **, u8);

​

static LIST_HEAD(gbuses);

​

static struct bus_node * __init alloc_error_bus(struct ebda_pci_rsrc *curr, u8 busno, int flag)

{

    struct bus_node *newbus;

​

    if (!(curr) && !(flag)) {

        err("NULL pointer passed\n");

        return NULL;

    }

​

    newbus = kzalloc(sizeof(struct bus_node), GFP_KERNEL);

    if (!newbus)

        return NULL;

​

    if (flag)

        newbus->busno = busno;

    else

        newbus->busno = curr->bus_num;

    list_add_tail(&newbus->bus_list, &gbuses);

    return newbus;

}

​

static struct resource_node * __init alloc_resources(struct ebda_pci_rsrc *curr)

{

    struct resource_node *rs;

​

    if (!curr) {

        err("NULL passed to allocate\n");

        return NULL;

    }

​

    rs = kzalloc(sizeof(struct resource_node), GFP_KERNEL);

    if (!rs)

        return NULL;

​

    rs->busno = curr->bus_num;

    rs->devfunc = curr->dev_fun;

    rs->start = curr->start_addr;

    rs->end = curr->end_addr;

    rs->len = curr->end_addr - curr->start_addr + 1;

    return rs;

}

​

static int __init alloc_bus_range(struct bus_node **new_bus, struct range_node **new_range, struct ebda_pci_rsrc *curr, int flag, u8 first_bus)

{

    struct bus_node *newbus;

    struct range_node *newrange;

    u8 num_ranges = 0;

​

    if (first_bus) {

        newbus = kzalloc(sizeof(struct bus_node), GFP_KERNEL);

        if (!newbus)

            return -ENOMEM;

​

        newbus->busno = curr->bus_num;

    } else {

        newbus = *new_bus;

        switch (flag) {

            case MEM: