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/ieee802154_netdev.h>
  28 #include <net/wpan-phy.h>
  29 #include <net/ieee802154_netdev.h>
  30
  31 #include "mac802154.h"
  32
  33 struct phy_chan_notify_work {
  34         struct work_struct work;
  35         struct net_device *dev;
  36 };
  37
  38 struct hw_addr_filt_notify_work {
  39         struct work_struct work;
  40         struct net_device *dev;
  41         unsigned long changed;
  42 };
  43
  44 static struct mac802154_priv *mac802154_slave_get_priv(struct net_device *dev)
  45 {
  46         struct mac802154_sub_if_data *priv = netdev_priv(dev);
  47
  48         BUG_ON(dev->type != ARPHRD_IEEE802154);
  49
  50         return priv->hw;
  51 }
  52
  53 static void hw_addr_notify(struct work_struct *work)
  54 {
  55         struct hw_addr_filt_notify_work *nw = container_of(work,
  56                         struct hw_addr_filt_notify_work, work);
  57         struct mac802154_priv *hw = mac802154_slave_get_priv(nw->dev);
  58         int res;
  59
  60         res = hw->ops->set_hw_addr_filt(&hw->hw,
  61                                         &hw->hw.hw_filt,
  62                                         nw->changed);
  63         if (res)
  64                 pr_debug("failed changed mask %lx\n", nw->changed);
  65
  66         kfree(nw);
  67 }
  68
  69 static void set_hw_addr_filt(struct net_device *dev, unsigned long changed)
  70 {
  71         struct mac802154_sub_if_data *priv = netdev_priv(dev);
  72         struct hw_addr_filt_notify_work *work;
  73
  74         work = kzalloc(sizeof(*work), GFP_ATOMIC);
  75         if (!work)
  76                 return;
  77
  78         INIT_WORK(&work->work, hw_addr_notify);
  79         work->dev = dev;
  80         work->changed = changed;
  81         queue_work(priv->hw->dev_workqueue, &work->work);
  82 }
  83
  84 void mac802154_dev_set_short_addr(struct net_device *dev, __le16 val)
  85 {
  86         struct mac802154_sub_if_data *priv = netdev_priv(dev);
  87
  88         BUG_ON(dev->type != ARPHRD_IEEE802154);
  89
  90         spin_lock_bh(&priv->mib_lock);
  91         priv->short_addr = val;
  92         spin_unlock_bh(&priv->mib_lock);
  93
  94         if ((priv->hw->ops->set_hw_addr_filt) &&
  95             (priv->hw->hw.hw_filt.short_addr != priv->short_addr)) {
  96                 priv->hw->hw.hw_filt.short_addr = priv->short_addr;
  97                 set_hw_addr_filt(dev, IEEE802515_AFILT_SADDR_CHANGED);
  98         }
  99 }
 100
 101 __le16 mac802154_dev_get_short_addr(const struct net_device *dev)
 102 {
 103         struct mac802154_sub_if_data *priv = netdev_priv(dev);
 104         __le16 ret;
 105
 106         BUG_ON(dev->type != ARPHRD_IEEE802154);
 107
 108         spin_lock_bh(&priv->mib_lock);
 109         ret = priv->short_addr;
 110         spin_unlock_bh(&priv->mib_lock);
 111
 112         return ret;
 113 }
 114
 115 void mac802154_dev_set_ieee_addr(struct net_device *dev)
 116 {
 117         struct mac802154_sub_if_data *priv = netdev_priv(dev);
 118         struct mac802154_priv *mac = priv->hw;
 119
 120         priv->extended_addr = ieee802154_devaddr_from_raw(dev->dev_addr);
 121
 122         if (mac->ops->set_hw_addr_filt &&
 123             mac->hw.hw_filt.ieee_addr != priv->extended_addr) {
 124                 mac->hw.hw_filt.ieee_addr = priv->extended_addr;
 125                 set_hw_addr_filt(dev, IEEE802515_AFILT_IEEEADDR_CHANGED);
 126         }
 127 }
 128
 129 __le16 mac802154_dev_get_pan_id(const struct net_device *dev)
 130 {
 131         struct mac802154_sub_if_data *priv = netdev_priv(dev);
 132         __le16 ret;
 133
 134         BUG_ON(dev->type != ARPHRD_IEEE802154);
 135
 136         spin_lock_bh(&priv->mib_lock);
 137         ret = priv->pan_id;
 138         spin_unlock_bh(&priv->mib_lock);
 139
 140         return ret;
 141 }
 142
 143 void mac802154_dev_set_pan_id(struct net_device *dev, __le16 val)
 144 {
 145         struct mac802154_sub_if_data *priv = netdev_priv(dev);
 146
 147         BUG_ON(dev->type != ARPHRD_IEEE802154);
 148
 149         spin_lock_bh(&priv->mib_lock);
 150         priv->pan_id = val;
 151         spin_unlock_bh(&priv->mib_lock);
 152
 153         if ((priv->hw->ops->set_hw_addr_filt) &&
 154             (priv->hw->hw.hw_filt.pan_id != priv->pan_id)) {
 155                 priv->hw->hw.hw_filt.pan_id = priv->pan_id;
 156                 set_hw_addr_filt(dev, IEEE802515_AFILT_PANID_CHANGED);
 157         }
 158 }
 159
 160 u8 mac802154_dev_get_dsn(const struct net_device *dev)
 161 {
 162         struct mac802154_sub_if_data *priv = netdev_priv(dev);
 163
 164         BUG_ON(dev->type != ARPHRD_IEEE802154);
 165
 166         return priv->dsn++;
 167 }
 168
 169 static void phy_chan_notify(struct work_struct *work)
 170 {
 171         struct phy_chan_notify_work *nw = container_of(work,
 172                                           struct phy_chan_notify_work, work);
 173         struct mac802154_priv *hw = mac802154_slave_get_priv(nw->dev);
 174         struct mac802154_sub_if_data *priv = netdev_priv(nw->dev);
 175         int res;
 176
 177         mutex_lock(&priv->hw->phy->pib_lock);
 178         res = hw->ops->set_channel(&hw->hw, priv->page, priv->chan);
 179         if (res)
 180                 pr_debug("set_channel failed\n");
 181         else {
 182                 priv->hw->phy->current_channel = priv->chan;
 183                 priv->hw->phy->current_page = priv->page;
 184         }
 185         mutex_unlock(&priv->hw->phy->pib_lock);
 186
 187         kfree(nw);
 188 }
 189
 190 void mac802154_dev_set_page_channel(struct net_device *dev, u8 page, u8 chan)
 191 {
 192         struct mac802154_sub_if_data *priv = netdev_priv(dev);
 193         struct phy_chan_notify_work *work;
 194
 195         BUG_ON(dev->type != ARPHRD_IEEE802154);
 196
 197         spin_lock_bh(&priv->mib_lock);
 198         priv->page = page;
 199         priv->chan = chan;
 200         spin_unlock_bh(&priv->mib_lock);
 201
 202         mutex_lock(&priv->hw->phy->pib_lock);
 203         if (priv->hw->phy->current_channel != priv->chan ||
 204             priv->hw->phy->current_page != priv->page) {
 205                 mutex_unlock(&priv->hw->phy->pib_lock);
 206
 207                 work = kzalloc(sizeof(*work), GFP_ATOMIC);
 208                 if (!work)
 209                         return;
 210
 211                 INIT_WORK(&work->work, phy_chan_notify);
 212                 work->dev = dev;
 213                 queue_work(priv->hw->dev_workqueue, &work->work);
 214         } else
 215                 mutex_unlock(&priv->hw->phy->pib_lock);
 216 }