net/mac802154/cfg.c

   1 /* This program is free software; you can redistribute it and/or modify
   2  * it under the terms of the GNU General Public License version 2
   3  * as published by the Free Software Foundation.
   4  *
   5  * This program is distributed in the hope that it will be useful,
   6  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   7  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   8  * GNU General Public License for more details.
   9  *
  10  * Authors:
  11  * Alexander Aring <aar@pengutronix.de>
  12  *
  13  * Based on: net/mac80211/cfg.c
  14  */
  15
  16 #include <net/rtnetlink.h>
  17 #include <net/cfg802154.h>
  18
  19 #include "ieee802154_i.h"
  20 #include "driver-ops.h"
  21 #include "cfg.h"
  22
  23 static struct net_device *
  24 ieee802154_add_iface_deprecated(struct wpan_phy *wpan_phy,
  25                                 const char *name, int type)
  26 {
  27         struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
  28         struct net_device *dev;
  29
  30         rtnl_lock();
  31         dev = ieee802154_if_add(local, name, NULL, type);
  32         rtnl_unlock();
  33
  34         return dev;
  35 }
  36
  37 static void ieee802154_del_iface_deprecated(struct wpan_phy *wpan_phy,
  38                                             struct net_device *dev)
  39 {
  40         struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);
  41
  42         ieee802154_if_remove(sdata);
  43 }
  44
  45 static int
  46 ieee802154_set_channel(struct wpan_phy *wpan_phy, const u8 page,
  47                        const u8 channel)
  48 {
  49         struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
  50         int ret;
  51
  52         ASSERT_RTNL();
  53
  54         /* check if phy support this setting */
  55         if (!(wpan_phy->channels_supported[page] & BIT(channel)))
  56                 return -EINVAL;
  57
  58         ret = drv_set_channel(local, page, channel);
  59         if (!ret) {
  60                 wpan_phy->current_page = page;
  61                 wpan_phy->current_channel = channel;
  62         }
  63
  64         return ret;
  65 }
  66
  67 static int ieee802154_set_pan_id(struct wpan_phy *wpan_phy,
  68                                  struct wpan_dev *wpan_dev, const u16 pan_id)
  69 {
  70         ASSERT_RTNL();
  71
  72         /* TODO
  73          * I am not sure about to check here on broadcast pan_id.
  74          * Broadcast is a valid setting, comment from 802.15.4:
  75          * If this value is 0xffff, the device is not associated.
  76          *
  77          * This could useful to simple deassociate an device.
  78          */
  79         if (pan_id == IEEE802154_PAN_ID_BROADCAST)
  80                 return -EINVAL;
  81
  82         wpan_dev->pan_id = cpu_to_le16(pan_id);
  83         return 0;
  84 }
  85
  86 static int
  87 ieee802154_set_backoff_exponent(struct wpan_phy *wpan_phy,
  88                                 struct wpan_dev *wpan_dev,
  89                                 const u8 min_be, const u8 max_be)
  90 {
  91         struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
  92
  93         ASSERT_RTNL();
  94
  95         if (!(local->hw.flags & IEEE802154_HW_CSMA_PARAMS))
  96                 return -EOPNOTSUPP;
  97
  98         wpan_dev->min_be = min_be;
  99         wpan_dev->max_be = max_be;
 100         return 0;
 101 }
 102
 103 static int
 104 ieee802154_set_short_addr(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
 105                           const u16 short_addr)
 106 {
 107         ASSERT_RTNL();
 108
 109         /* TODO
 110          * I am not sure about to check here on broadcast short_addr.
 111          * Broadcast is a valid setting, comment from 802.15.4:
 112          * A value of 0xfffe indicates that the device has
 113          * associated but has not been allocated an address. A
 114          * value of 0xffff indicates that the device does not
 115          * have a short address.
 116          *
 117          * I think we should allow to set these settings but
 118          * don't allow to allow socket communication with it.
 119          */
 120         if (short_addr == IEEE802154_ADDR_SHORT_UNSPEC ||
 121             short_addr == IEEE802154_ADDR_SHORT_BROADCAST)
 122                 return -EINVAL;
 123
 124         wpan_dev->short_addr = cpu_to_le16(short_addr);
 125         return 0;
 126 }
 127
 128 static int ieee802154_set_max_csma_backoffs(struct wpan_phy *wpan_phy,
 129                                             struct wpan_dev *wpan_dev,
 130                                             const u8 max_csma_backoffs)
 131 {
 132         struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
 133
 134         ASSERT_RTNL();
 135
 136         if (!(local->hw.flags & IEEE802154_HW_CSMA_PARAMS))
 137                 return -EOPNOTSUPP;
 138
 139         wpan_dev->csma_retries = max_csma_backoffs;
 140         return 0;
 141 }
 142
 143 const struct cfg802154_ops mac802154_config_ops = {
 144         .add_virtual_intf_deprecated = ieee802154_add_iface_deprecated,
 145         .del_virtual_intf_deprecated = ieee802154_del_iface_deprecated,
 146         .set_channel = ieee802154_set_channel,
 147         .set_pan_id = ieee802154_set_pan_id,
 148         .set_short_addr = ieee802154_set_short_addr,
 149         .set_backoff_exponent = ieee802154_set_backoff_exponent,
 150         .set_max_csma_backoffs = ieee802154_set_max_csma_backoffs,
 151 };