net/mac802154/mib.c

   1 /*
   2  * Copyright 2007-2012 Siemens AG
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2
   6  * as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  16  *
  17  * Written by:
  18  * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
  19  * Sergey Lapin <slapin@ossfans.org>
  20  * Maxim Gorbachyov <maxim.gorbachev@siemens.com>
  21  * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
  22  */
  23
  24 #include <linux/if_arp.h>
  25
  26 #include <net/mac802154.h>
  27 #include <net/wpan-phy.h>
  28
  29 #include "mac802154.h"
  30
  31 struct hw_addr_filt_notify_work {
  32         struct work_struct work;
  33         struct net_device *dev;
  34         unsigned long changed;
  35 };
  36
  37 struct mac802154_priv *mac802154_slave_get_priv(struct net_device *dev)
  38 {
  39         struct mac802154_sub_if_data *priv = netdev_priv(dev);
  40
  41         BUG_ON(dev->type != ARPHRD_IEEE802154);
  42
  43         return priv->hw;
  44 }
  45
  46 static void hw_addr_notify(struct work_struct *work)
  47 {
  48         struct hw_addr_filt_notify_work *nw = container_of(work,
  49                         struct hw_addr_filt_notify_work, work);
  50         struct mac802154_priv *hw = mac802154_slave_get_priv(nw->dev);
  51         int res;
  52
  53         res = hw->ops->set_hw_addr_filt(&hw->hw,
  54                                         &hw->hw.hw_filt,
  55                                         nw->changed);
  56         if (res)
  57                 pr_debug("failed changed mask %lx\n", nw->changed);
  58
  59         kfree(nw);
  60
  61         return;
  62 }
  63
  64 static void set_hw_addr_filt(struct net_device *dev, unsigned long changed)
  65 {
  66         struct mac802154_sub_if_data *priv = netdev_priv(dev);
  67         struct hw_addr_filt_notify_work *work;
  68
  69         work = kzalloc(sizeof(*work), GFP_ATOMIC);
  70         if (!work)
  71                 return;
  72
  73         INIT_WORK(&work->work, hw_addr_notify);
  74         work->dev = dev;
  75         work->changed = changed;
  76         queue_work(priv->hw->dev_workqueue, &work->work);
  77
  78         return;
  79 }
  80
  81 void mac802154_dev_set_ieee_addr(struct net_device *dev)
  82 {
  83         struct mac802154_sub_if_data *priv = netdev_priv(dev);
  84         struct mac802154_priv *mac = priv->hw;
  85
  86         if (mac->ops->set_hw_addr_filt &&
  87             memcmp(mac->hw.hw_filt.ieee_addr,
  88                    dev->dev_addr, IEEE802154_ADDR_LEN)) {
  89                 memcpy(mac->hw.hw_filt.ieee_addr,
  90                        dev->dev_addr, IEEE802154_ADDR_LEN);
  91                 set_hw_addr_filt(dev, IEEE802515_AFILT_IEEEADDR_CHANGED);
  92         }
  93 }