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