118 lines
2.6 KiB
C
118 lines
2.6 KiB
C
/*
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* Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/interrupt.h>
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#include <linux/if.h>
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#include <linux/if_ether.h>
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#include <linux/netdevice.h>
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#include <net/d80211.h>
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#include "ieee80211_i.h"
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#include "ieee80211_led.h"
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struct ieee80211_dev_list {
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struct list_head list;
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int dev_index;
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struct ieee80211_local *local;
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};
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static LIST_HEAD(dev_list);
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static DEFINE_SPINLOCK(dev_list_lock);
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/* Caller must hold dev_list_lock */
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static struct ieee80211_dev_list *__ieee80211_dev_find(int index)
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{
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struct ieee80211_dev_list *dev_item;
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list_for_each_entry(dev_item, &dev_list, list) {
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if (dev_item->dev_index == index)
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return dev_item;
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}
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return NULL;
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}
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int ieee80211_dev_alloc_index(struct ieee80211_local *local)
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{
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struct ieee80211_dev_list *dev_item, *new;
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int index = 0;
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new = kmalloc(sizeof(struct ieee80211_dev_list), GFP_KERNEL);
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if (!new)
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return -ENOMEM;
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new->local = local;
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spin_lock(&dev_list_lock);
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list_for_each_entry(dev_item, &dev_list, list) {
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if (index < dev_item->dev_index)
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break;
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index++;
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}
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new->dev_index = index;
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list_add_tail(&new->list, &dev_item->list);
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spin_unlock(&dev_list_lock);
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local->hw.index = index;
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return index;
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}
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void ieee80211_dev_free_index(struct ieee80211_local *local)
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{
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struct ieee80211_dev_list *dev_item;
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spin_lock(&dev_list_lock);
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dev_item = __ieee80211_dev_find(local->hw.index);
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if (dev_item)
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list_del(&dev_item->list);
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spin_unlock(&dev_list_lock);
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if (dev_item)
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kfree(dev_item);
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local->hw.index = -1;
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}
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struct ieee80211_local *ieee80211_dev_find(int index)
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{
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struct ieee80211_dev_list *dev_item;
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spin_lock(&dev_list_lock);
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dev_item = __ieee80211_dev_find(index);
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spin_unlock(&dev_list_lock);
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return dev_item ? dev_item->local : NULL;
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}
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int ieee80211_dev_find_index(struct ieee80211_local *local)
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{
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struct ieee80211_dev_list *dev_item;
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int index = -1;
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spin_lock(&dev_list_lock);
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list_for_each_entry(dev_item, &dev_list, list) {
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if (dev_item->local == local) {
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index = dev_item->dev_index;
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break;
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}
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}
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spin_unlock(&dev_list_lock);
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return index;
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}
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struct ieee80211_local *ieee80211_dev_alloc(gfp_t flags)
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{
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struct ieee80211_local *local;
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local = kzalloc(sizeof(struct ieee80211_local), flags);
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if (!local)
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return NULL;
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local->hw.index = -1;
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ieee80211_dev_sysfs_init(local);
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return local;
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}
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void ieee80211_dev_free(struct ieee80211_local *local)
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{
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ieee80211_dev_sysfs_put(local);
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}
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