package/mac80211/patches/330-nl80211_ht40.patch

   1 This patch adds new NL80211_CMD_SET_WIPHY attributes
   2 NL80211_ATTR_WIPHY_FREQ and NL80211_ATTR_WIPHY_SEC_CHAN_OFFSET to allow
   3 userspace to set the operating channel (e.g., hostapd for AP mode).
   4
   5 Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com>
   6 Acked-by: Johannes Berg <johannes@sipsolutions.net>
   7
   8
   9 Index: wireless-testing/include/linux/nl80211.h
  10 ===================================================================
  11 --- wireless-testing.orig/include/linux/nl80211.h       2008-11-26 15:15:31.000000000 +0200
  12 +++ wireless-testing/include/linux/nl80211.h    2008-11-26 15:16:59.000000000 +0200
  13 @@ -26,8 +26,9 @@
  14   * @NL80211_CMD_GET_WIPHY: request information about a wiphy or dump request
  15   *     to get a list of all present wiphys.
  16   * @NL80211_CMD_SET_WIPHY: set wiphy parameters, needs %NL80211_ATTR_WIPHY or
  17 - *     %NL80211_ATTR_IFINDEX; can be used to set %NL80211_ATTR_WIPHY_NAME
  18 - *     and/or %NL80211_ATTR_WIPHY_TXQ_PARAMS.
  19 + *     %NL80211_ATTR_IFINDEX; can be used to set %NL80211_ATTR_WIPHY_NAME,
  20 + *     %NL80211_ATTR_WIPHY_TXQ_PARAMS, %NL80211_ATTR_WIPHY_FREQ, and/or
  21 + *     %NL80211_ATTR_WIPHY_SEC_CHAN_OFFSET.
  22   * @NL80211_CMD_NEW_WIPHY: Newly created wiphy, response to get request
  23   *     or rename notification. Has attributes %NL80211_ATTR_WIPHY and
  24   *     %NL80211_ATTR_WIPHY_NAME.
  25 @@ -180,6 +181,14 @@
  26   *     /sys/class/ieee80211/<phyname>/index
  27   * @NL80211_ATTR_WIPHY_NAME: wiphy name (used for renaming)
  28   * @NL80211_ATTR_WIPHY_TXQ_PARAMS: a nested array of TX queue parameters
  29 + * @NL80211_ATTR_WIPHY_FREQ: frequency of the selected channel in MHz
  30 + * @NL80211_ATTR_WIPHY_SEC_CHAN_OFFSET: included with NL80211_ATTR_WIPHY_FREQ
  31 + *     if HT20 or HT40 are allowed (i.e., 802.11n disabled if not included):
  32 + *     NL80211_SEC_CHAN_NO_HT = HT not allowed (i.e., same as not including
  33 + *             this attribute)
  34 + *     NL80211_SEC_CHAN_DISABLED = HT20 only
  35 + *     NL80211_SEC_CHAN_BELOW = secondary channel is below the primary channel
  36 + *     NL80211_SEC_CHAN_ABOVE = secondary channel is above the primary channel
  37   *
  38   * @NL80211_ATTR_IFINDEX: network interface index of the device to operate on
  39   * @NL80211_ATTR_IFNAME: network interface name
  40 @@ -315,6 +324,8 @@
  41         NL80211_ATTR_BSS_BASIC_RATES,
  42
  43         NL80211_ATTR_WIPHY_TXQ_PARAMS,
  44 +       NL80211_ATTR_WIPHY_FREQ,
  45 +       NL80211_ATTR_WIPHY_SEC_CHAN_OFFSET,
  46
  47         /* add attributes here, update the policy in nl80211.c */
  48
  49 @@ -329,6 +340,8 @@
  50  #define NL80211_ATTR_HT_CAPABILITY NL80211_ATTR_HT_CAPABILITY
  51  #define NL80211_ATTR_BSS_BASIC_RATES NL80211_ATTR_BSS_BASIC_RATES
  52  #define NL80211_ATTR_WIPHY_TXQ_PARAMS NL80211_ATTR_WIPHY_TXQ_PARAMS
  53 +#define NL80211_ATTR_WIPHY_FREQ NL80211_ATTR_WIPHY_FREQ
  54 +#define NL80211_ATTR_WIPHY_SEC_CHAN_OFFSET NL80211_ATTR_WIPHY_SEC_CHAN_OFFSET
  55
  56  #define NL80211_MAX_SUPP_RATES                 32
  57  #define NL80211_MAX_SUPP_REG_RULES             32
  58 @@ -742,4 +755,10 @@
  59         NL80211_TXQ_Q_BK
  60  };
  61
  62 +enum nl80211_sec_chan_offset {
  63 +       NL80211_SEC_CHAN_NO_HT /* No HT */,
  64 +       NL80211_SEC_CHAN_DISABLED /* HT20 only */,
  65 +       NL80211_SEC_CHAN_BELOW /* HT40- */,
  66 +       NL80211_SEC_CHAN_ABOVE /* HT40+ */
  67 +};
  68  #endif /* __LINUX_NL80211_H */
  69 Index: wireless-testing/include/net/cfg80211.h
  70 ===================================================================
  71 --- wireless-testing.orig/include/net/cfg80211.h        2008-11-26 15:15:31.000000000 +0200
  72 +++ wireless-testing/include/net/cfg80211.h     2008-11-26 15:29:50.000000000 +0200
  73 @@ -392,6 +392,9 @@
  74  /* from net/wireless.h */
  75  struct wiphy;
  76
  77 +/* from net/ieee80211.h */
  78 +struct ieee80211_channel;
  79 +
  80  /**
  81   * struct cfg80211_ops - backend description for wireless configuration
  82   *
  83 @@ -450,6 +453,8 @@
  84   * @change_bss: Modify parameters for a given BSS.
  85   *
  86   * @set_txq_params: Set TX queue parameters
  87 + *
  88 + * @set_channel: Set channel
  89   */
  90  struct cfg80211_ops {
  91         int     (*add_virtual_intf)(struct wiphy *wiphy, char *name,
  92 @@ -513,6 +518,10 @@
  93
  94         int     (*set_txq_params)(struct wiphy *wiphy,
  95                                   struct ieee80211_txq_params *params);
  96 +
  97 +       int     (*set_channel)(struct wiphy *wiphy,
  98 +                              struct ieee80211_channel *chan,
  99 +                              enum nl80211_sec_chan_offset);
 100  };
 101
 102  #endif /* __NET_CFG80211_H */
 103 Index: wireless-testing/net/mac80211/cfg.c
 104 ===================================================================
 105 --- wireless-testing.orig/net/mac80211/cfg.c    2008-11-26 15:15:31.000000000 +0200
 106 +++ wireless-testing/net/mac80211/cfg.c 2008-11-26 15:19:34.000000000 +0200
 107 @@ -1095,6 +1095,18 @@
 108         return 0;
 109  }
 110
 111 +static int ieee80211_set_channel(struct wiphy *wiphy,
 112 +                                struct ieee80211_channel *chan,
 113 +                                enum nl80211_sec_chan_offset sec_chan_offset)
 114 +{
 115 +       struct ieee80211_local *local = wiphy_priv(wiphy);
 116 +
 117 +       local->oper_channel = chan;
 118 +       local->oper_sec_chan_offset = sec_chan_offset;
 119 +
 120 +       return ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
 121 +}
 122 +
 123  struct cfg80211_ops mac80211_config_ops = {
 124         .add_virtual_intf = ieee80211_add_iface,
 125         .del_virtual_intf = ieee80211_del_iface,
 126 @@ -1122,4 +1134,5 @@
 127  #endif
 128         .change_bss = ieee80211_change_bss,
 129         .set_txq_params = ieee80211_set_txq_params,
 130 +       .set_channel = ieee80211_set_channel,
 131  };
 132 Index: wireless-testing/net/wireless/nl80211.c
 133 ===================================================================
 134 --- wireless-testing.orig/net/wireless/nl80211.c        2008-11-26 15:15:31.000000000 +0200
 135 +++ wireless-testing/net/wireless/nl80211.c     2008-11-26 15:31:31.000000000 +0200
 136 @@ -59,6 +59,8 @@
 137         [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING,
 138                                       .len = BUS_ID_SIZE-1 },
 139         [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED },
 140 +       [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 },
 141 +       [NL80211_ATTR_WIPHY_SEC_CHAN_OFFSET] = { .type = NLA_U32 },
 142
 143         [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 },
 144         [NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
 145 @@ -359,6 +361,61 @@
 146                 }
 147         }
 148
 149 +       if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) {
 150 +               enum nl80211_sec_chan_offset sec_chan_offset =
 151 +                       NL80211_SEC_CHAN_NO_HT;
 152 +               struct ieee80211_channel *chan;
 153 +               u32 freq, sec_freq;
 154 +
 155 +               if (!rdev->ops->set_channel) {
 156 +                       result = -EOPNOTSUPP;
 157 +                       goto bad_res;
 158 +               }
 159 +
 160 +               if (info->attrs[NL80211_ATTR_WIPHY_SEC_CHAN_OFFSET]) {
 161 +                       sec_chan_offset = nla_get_u32(
 162 +                               info->attrs[
 163 +                                       NL80211_ATTR_WIPHY_SEC_CHAN_OFFSET]);
 164 +                       if (sec_chan_offset != NL80211_SEC_CHAN_NO_HT &&
 165 +                           sec_chan_offset != NL80211_SEC_CHAN_DISABLED &&
 166 +                           sec_chan_offset != NL80211_SEC_CHAN_BELOW &&
 167 +                           sec_chan_offset != NL80211_SEC_CHAN_ABOVE) {
 168 +                               result = -EINVAL;
 169 +                               goto bad_res;
 170 +                       }
 171 +               }
 172 +
 173 +               freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
 174 +               chan = ieee80211_get_channel(&rdev->wiphy, freq);
 175 +               if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) {
 176 +                       /* Primary channel not allowed */
 177 +                       result = -EINVAL;
 178 +                       goto bad_res;
 179 +               }
 180 +               if (sec_chan_offset == NL80211_SEC_CHAN_BELOW)
 181 +                       sec_freq = freq - 20;
 182 +               else if (sec_chan_offset == NL80211_SEC_CHAN_ABOVE)
 183 +                       sec_freq = freq + 20;
 184 +               else
 185 +                       sec_freq = 0;
 186 +
 187 +               if (sec_freq) {
 188 +                       struct ieee80211_channel *schan;
 189 +                       schan = ieee80211_get_channel(&rdev->wiphy, sec_freq);
 190 +                       if (!schan || schan->flags & IEEE80211_CHAN_DISABLED) {
 191 +                               /* Secondary channel not allowed */
 192 +                               result = -EINVAL;
 193 +                               goto bad_res;
 194 +                       }
 195 +               }
 196 +
 197 +               result = rdev->ops->set_channel(&rdev->wiphy, chan,
 198 +                                               sec_chan_offset);
 199 +               if (result)
 200 +                       goto bad_res;
 201 +       }
 202 +
 203 +
 204  bad_res:
 205         cfg80211_put_dev(rdev);
 206         return result;
 207 Index: wireless-testing/include/net/mac80211.h
 208 ===================================================================
 209 --- wireless-testing.orig/include/net/mac80211.h        2008-11-26 15:15:31.000000000 +0200
 210 +++ wireless-testing/include/net/mac80211.h     2008-11-26 15:15:47.000000000 +0200
 211 @@ -507,6 +507,9 @@
 212
 213  struct ieee80211_ht_conf {
 214         bool enabled;
 215 +       int sec_chan_offset; /* 0 = HT40 disabled; -1 = HT40 enabled, secondary
 216 +                             * channel below primary; 1 = HT40 enabled,
 217 +                             * secondary channel above primary */
 218  };
 219
 220  /**
 221 Index: wireless-testing/net/mac80211/util.c
 222 ===================================================================
 223 --- wireless-testing.orig/net/mac80211/util.c   2008-11-26 15:15:31.000000000 +0200
 224 +++ wireless-testing/net/mac80211/util.c        2008-11-26 15:20:26.000000000 +0200
 225 @@ -641,6 +641,7 @@
 226                     chan->flags & IEEE80211_CHAN_NO_IBSS)
 227                         return ret;
 228                 local->oper_channel = chan;
 229 +               local->oper_sec_chan_offset = NL80211_SEC_CHAN_NO_HT;
 230
 231                 if (local->sw_scanning || local->hw_scanning)
 232                         ret = 0;
 233 Index: wireless-testing/net/mac80211/ieee80211_i.h
 234 ===================================================================
 235 --- wireless-testing.orig/net/mac80211/ieee80211_i.h    2008-11-26 15:15:31.000000000 +0200
 236 +++ wireless-testing/net/mac80211/ieee80211_i.h 2008-11-26 15:20:12.000000000 +0200
 237 @@ -626,6 +626,7 @@
 238         struct delayed_work scan_work;
 239         struct ieee80211_sub_if_data *scan_sdata;
 240         struct ieee80211_channel *oper_channel, *scan_channel;
 241 +       enum nl80211_sec_chan_offset oper_sec_chan_offset;
 242         u8 scan_ssid[IEEE80211_MAX_SSID_LEN];
 243         size_t scan_ssid_len;
 244         struct list_head bss_list;
 245 Index: wireless-testing/net/mac80211/main.c
 246 ===================================================================
 247 --- wireless-testing.orig/net/mac80211/main.c   2008-11-26 15:15:31.000000000 +0200
 248 +++ wireless-testing/net/mac80211/main.c        2008-11-26 15:29:09.000000000 +0200
 249 @@ -195,20 +195,42 @@
 250         struct ieee80211_channel *chan;
 251         int ret = 0;
 252         int power;
 253 +       enum nl80211_sec_chan_offset sec_chan_offset;
 254
 255         might_sleep();
 256
 257 -       if (local->sw_scanning)
 258 +       if (local->sw_scanning) {
 259                 chan = local->scan_channel;
 260 -       else
 261 +               sec_chan_offset = NL80211_SEC_CHAN_NO_HT;
 262 +       } else {
 263                 chan = local->oper_channel;
 264 +               sec_chan_offset = local->oper_sec_chan_offset;
 265 +       }
 266
 267 -       if (chan != local->hw.conf.channel) {
 268 +       if (chan != local->hw.conf.channel ||
 269 +           sec_chan_offset != local->hw.conf.ht.sec_chan_offset) {
 270                 local->hw.conf.channel = chan;
 271 +               switch (sec_chan_offset) {
 272 +               case NL80211_SEC_CHAN_NO_HT:
 273 +                       local->hw.conf.ht.enabled = false;
 274 +                       local->hw.conf.ht.sec_chan_offset = 0;
 275 +                       break;
 276 +               case NL80211_SEC_CHAN_DISABLED:
 277 +                       local->hw.conf.ht.enabled = true;
 278 +                       local->hw.conf.ht.sec_chan_offset = 0;
 279 +                       break;
 280 +               case NL80211_SEC_CHAN_BELOW:
 281 +                       local->hw.conf.ht.enabled = true;
 282 +                       local->hw.conf.ht.sec_chan_offset = -1;
 283 +                       break;
 284 +               case NL80211_SEC_CHAN_ABOVE:
 285 +                       local->hw.conf.ht.enabled = true;
 286 +                       local->hw.conf.ht.sec_chan_offset = 1;
 287 +                       break;
 288 +               }
 289                 changed |= IEEE80211_CONF_CHANGE_CHANNEL;
 290         }
 291
 292 -
 293         if (!local->hw.conf.power_level)
 294                 power = chan->max_power;
 295         else
 296
 297 --
 298 Jouni Malinen                                            PGP id EFC895FA
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