| 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 | } |