Return-path: Received: from mail.atheros.com ([12.36.123.2]:31962 "EHLO mail.atheros.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751457AbYLHKDy (ORCPT ); Mon, 8 Dec 2008 05:03:54 -0500 Received: from mail.atheros.com ([10.10.20.108]) by sidewinder.atheros.com for ; Mon, 08 Dec 2008 02:03:54 -0800 From: Sujith MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Message-ID: <18748.61509.403330.286366@gargle.gargle.HOWL> (sfid-20081208_110416_636246_35CE21B9) Date: Mon, 8 Dec 2008 15:30:37 +0530 To: CC: , , , , Subject: [RFC] mac80211: fix HT channel selection Sender: linux-wireless-owner@vger.kernel.org List-ID: HT management is done differently for AP and STA modes, unify to just the ->config() callback since HT is fundamentally a PHY property and cannot be per-BSS. Signed-off-by: Johannes Berg Signed-off-by: Sujith --- v2: --- Add a new NL80211 attribute to enable/disable HT (NL80211_ATTR_WIPHY_HT). NL80211_ATTR_WIPHY_SEC_CHAN_OFFSET now has only the secondary channel offsets. ieee80211_enable_ht() and ieee8021_hw_config() have been cleaned up a bit to handle the revised nl80211 attributes. I have tested this with ath9k, works okay in both STA and AP mode. drivers/net/wireless/ath9k/main.c | 108 ++++++------------------------- drivers/net/wireless/iwlwifi/iwl-agn.c | 21 +++++-- drivers/net/wireless/mac80211_hwsim.c | 7 +-- include/linux/nl80211.h | 8 +-- include/net/cfg80211.h | 1 + include/net/mac80211.h | 9 +--- net/mac80211/cfg.c | 2 + net/mac80211/ht.c | 57 ----------------- net/mac80211/ieee80211_i.h | 4 +- net/mac80211/main.c | 26 ++------ net/mac80211/mlme.c | 68 ++++++++++++++++++++- net/mac80211/util.c | 3 +- net/wireless/nl80211.c | 14 +++-- 13 files changed, 131 insertions(+), 197 deletions(-) diff --git a/drivers/net/wireless/ath9k/main.c b/drivers/net/wireless/ath9k/main.c index 9939749..0a646e9 100644 --- a/drivers/net/wireless/ath9k/main.c +++ b/drivers/net/wireless/ath9k/main.c @@ -622,8 +622,6 @@ static int ath_get_channel(struct ath_softc *sc, return -1; } -/* ext_chan_offset: (-1, 0, 1) (below, none, above) */ - static u32 ath_get_extchanmode(struct ath_softc *sc, struct ieee80211_channel *chan, int ext_chan_offset, @@ -633,24 +631,24 @@ static u32 ath_get_extchanmode(struct ath_softc *sc, switch (chan->band) { case IEEE80211_BAND_2GHZ: - if ((ext_chan_offset == 0) && + if ((ext_chan_offset == NL80211_SEC_CHAN_DISABLED) && (tx_chan_width == ATH9K_HT_MACMODE_20)) chanmode = CHANNEL_G_HT20; - if ((ext_chan_offset == 1) && + if ((ext_chan_offset == NL80211_SEC_CHAN_ABOVE) && (tx_chan_width == ATH9K_HT_MACMODE_2040)) chanmode = CHANNEL_G_HT40PLUS; - if ((ext_chan_offset == -1) && + if ((ext_chan_offset == NL80211_SEC_CHAN_BELOW) && (tx_chan_width == ATH9K_HT_MACMODE_2040)) chanmode = CHANNEL_G_HT40MINUS; break; case IEEE80211_BAND_5GHZ: - if ((ext_chan_offset == 0) && + if ((ext_chan_offset == NL80211_SEC_CHAN_DISABLED) && (tx_chan_width == ATH9K_HT_MACMODE_20)) chanmode = CHANNEL_A_HT20; - if ((ext_chan_offset == 1) && + if ((ext_chan_offset == NL80211_SEC_CHAN_ABOVE) && (tx_chan_width == ATH9K_HT_MACMODE_2040)) chanmode = CHANNEL_A_HT40PLUS; - if ((ext_chan_offset == -1) && + if ((ext_chan_offset == NL80211_SEC_CHAN_BELOW) && (tx_chan_width == ATH9K_HT_MACMODE_2040)) chanmode = CHANNEL_A_HT40MINUS; break; @@ -828,42 +826,11 @@ static void setup_ht_cap(struct ieee80211_sta_ht_cap *ht_info) ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED; } -static void ath9k_ht_conf(struct ath_softc *sc, - struct ieee80211_bss_conf *bss_conf) -{ - if (sc->hw->conf.ht.enabled) { - if (bss_conf->ht.width_40_ok) - sc->tx_chan_width = ATH9K_HT_MACMODE_2040; - else - sc->tx_chan_width = ATH9K_HT_MACMODE_20; - - ath9k_hw_set11nmac2040(sc->sc_ah, sc->tx_chan_width); - - DPRINTF(sc, ATH_DBG_CONFIG, - "BSS Changed HT, chanwidth: %d\n", sc->tx_chan_width); - } -} - -static inline int ath_sec_offset(u8 ext_offset) -{ - if (ext_offset == IEEE80211_HT_PARAM_CHA_SEC_NONE) - return 0; - else if (ext_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE) - return 1; - else if (ext_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW) - return -1; - - return 0; -} - static void ath9k_bss_assoc_info(struct ath_softc *sc, struct ieee80211_vif *vif, struct ieee80211_bss_conf *bss_conf) { - struct ieee80211_hw *hw = sc->hw; - struct ieee80211_channel *curchan = hw->conf.channel; struct ath_vap *avp = (void *)vif->drv_priv; - int pos; DECLARE_MAC_BUF(mac); if (bss_conf->assoc) { @@ -886,40 +853,6 @@ static void ath9k_bss_assoc_info(struct ath_softc *sc, sc->sc_halstats.ns_avgtxrssi = ATH_RSSI_DUMMY_MARKER; sc->sc_halstats.ns_avgtxrate = ATH_RATE_DUMMY_MARKER; - /* Update chainmask */ - ath_update_chainmask(sc, hw->conf.ht.enabled); - - DPRINTF(sc, ATH_DBG_CONFIG, - "bssid %s aid 0x%x\n", - print_mac(mac, sc->sc_curbssid), sc->sc_curaid); - - pos = ath_get_channel(sc, curchan); - if (pos == -1) { - DPRINTF(sc, ATH_DBG_FATAL, - "Invalid channel: %d\n", curchan->center_freq); - return; - } - - if (hw->conf.ht.enabled) { - int offset = - ath_sec_offset(bss_conf->ht.secondary_channel_offset); - sc->tx_chan_width = (bss_conf->ht.width_40_ok) ? - ATH9K_HT_MACMODE_2040 : ATH9K_HT_MACMODE_20; - - sc->sc_ah->ah_channels[pos].chanmode = - ath_get_extchanmode(sc, curchan, - offset, sc->tx_chan_width); - } else { - sc->sc_ah->ah_channels[pos].chanmode = - (curchan->band == IEEE80211_BAND_2GHZ) ? - CHANNEL_G : CHANNEL_A; - } - - /* set h/w channel */ - if (ath_set_channel(sc, &sc->sc_ah->ah_channels[pos]) < 0) - DPRINTF(sc, ATH_DBG_FATAL, "Unable to set channel: %d\n", - curchan->center_freq); - /* Start ANI */ mod_timer(&sc->sc_ani.timer, jiffies + msecs_to_jiffies(ATH_ANI_POLLINTERVAL)); @@ -2146,13 +2079,16 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed) struct ath_softc *sc = hw->priv; struct ieee80211_conf *conf = &hw->conf; - if (changed & IEEE80211_CONF_CHANGE_CHANNEL) { + if (changed & (IEEE80211_CONF_CHANGE_CHANNEL | + IEEE80211_CONF_CHANGE_HT)) { struct ieee80211_channel *curchan = hw->conf.channel; int pos; DPRINTF(sc, ATH_DBG_CONFIG, "Set channel: %d MHz\n", curchan->center_freq); + ath_update_chainmask(sc, conf->ht.enabled); + pos = ath_get_channel(sc, curchan); if (pos == -1) { DPRINTF(sc, ATH_DBG_FATAL, "Invalid channel: %d\n", @@ -2160,21 +2096,25 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed) return -EINVAL; } - sc->tx_chan_width = ATH9K_HT_MACMODE_20; + switch(conf->ht.sec_chan_offset) { + case NL80211_SEC_CHAN_ABOVE: + case NL80211_SEC_CHAN_BELOW: + sc->tx_chan_width = ATH9K_HT_MACMODE_2040; + break; + case NL80211_SEC_CHAN_DISABLED: + sc->tx_chan_width = ATH9K_HT_MACMODE_20; + break; + } + sc->sc_ah->ah_channels[pos].chanmode = (curchan->band == IEEE80211_BAND_2GHZ) ? CHANNEL_G : CHANNEL_A; - if ((sc->sc_ah->ah_opmode == NL80211_IFTYPE_AP) && - (conf->ht.enabled)) { - sc->tx_chan_width = (!!conf->ht.sec_chan_offset) ? - ATH9K_HT_MACMODE_2040 : ATH9K_HT_MACMODE_20; - + if(conf->ht.enabled) sc->sc_ah->ah_channels[pos].chanmode = ath_get_extchanmode(sc, curchan, conf->ht.sec_chan_offset, sc->tx_chan_width); - } if (ath_set_channel(sc, &sc->sc_ah->ah_channels[pos]) < 0) { DPRINTF(sc, ATH_DBG_FATAL, "Unable to set channel\n"); @@ -2182,9 +2122,6 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed) } } - if (changed & IEEE80211_CONF_CHANGE_HT) - ath_update_chainmask(sc, conf->ht.enabled); - if (changed & IEEE80211_CONF_CHANGE_POWER) sc->sc_config.txpowlimit = 2 * conf->power_level; @@ -2419,9 +2356,6 @@ static void ath9k_bss_info_changed(struct ieee80211_hw *hw, sc->sc_flags &= ~SC_OP_PROTECT_ENABLE; } - if (changed & BSS_CHANGED_HT) - ath9k_ht_conf(sc, bss_conf); - if (changed & BSS_CHANGED_ASSOC) { DPRINTF(sc, ATH_DBG_CONFIG, "BSS Changed ASSOC %d\n", bss_conf->assoc); diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c index fc4e7e4..28668e1 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn.c +++ b/drivers/net/wireless/iwlwifi/iwl-agn.c @@ -516,19 +516,28 @@ static void iwl_ht_conf(struct iwl_priv *priv, iwl_conf->supported_chan_width = !!(ht_conf->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40); - iwl_conf->extension_chan_offset = bss_conf->ht.secondary_channel_offset; - /* If no above or below channel supplied disable FAT channel */ - if (iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_ABOVE && - iwl_conf->extension_chan_offset != IEEE80211_HT_PARAM_CHA_SEC_BELOW) { + /* + * XXX: The HT configuration needs to be moved into iwl_mac_config() + * to be done there correctly. + */ + switch (priv->hw->conf.ht.sec_chan_offset) { + case NL80211_SEC_CHAN_BELOW: + iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_BELOW; + break; + case NL80211_SEC_CHAN_ABOVE: + iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_ABOVE; + break; + case NL80211_SEC_CHAN_DISABLED: iwl_conf->extension_chan_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE; - iwl_conf->supported_chan_width = 0; + break; } iwl_conf->sm_ps = (u8)((ht_conf->cap & IEEE80211_HT_CAP_SM_PS) >> 2); memcpy(&iwl_conf->mcs, &ht_conf->mcs, 16); - iwl_conf->tx_chan_width = bss_conf->ht.width_40_ok; + iwl_conf->tx_chan_width = + iwl_conf->extension_chan_offset != NL80211_SEC_CHAN_DISABLED; iwl_conf->ht_protection = bss_conf->ht.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION; iwl_conf->non_GF_STA_present = diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c index f43da1c..d6d01cd 100644 --- a/drivers/net/wireless/mac80211_hwsim.c +++ b/drivers/net/wireless/mac80211_hwsim.c @@ -497,11 +497,8 @@ static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw, } if (changed & BSS_CHANGED_HT) { - printk(KERN_DEBUG " %s: HT: sec_ch_offs=%d width_40_ok=%d " - "op_mode=%d\n", - wiphy_name(hw->wiphy), - info->ht.secondary_channel_offset, - info->ht.width_40_ok, info->ht.operation_mode); + printk(KERN_DEBUG " %s: HT: op_mode=%d\n", + wiphy_name(hw->wiphy), info->ht.operation_mode); } if (changed & BSS_CHANGED_BASIC_RATES) { diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h index 04d4516..c074e04 100644 --- a/include/linux/nl80211.h +++ b/include/linux/nl80211.h @@ -202,13 +202,11 @@ enum nl80211_commands { * @NL80211_ATTR_WIPHY_TXQ_PARAMS: a nested array of TX queue parameters * @NL80211_ATTR_WIPHY_FREQ: frequency of the selected channel in MHz * @NL80211_ATTR_WIPHY_SEC_CHAN_OFFSET: included with NL80211_ATTR_WIPHY_FREQ - * if HT20 or HT40 are allowed (i.e., 802.11n disabled if not included): - * NL80211_SEC_CHAN_NO_HT = HT not allowed (i.e., same as not including - * this attribute) * NL80211_SEC_CHAN_DISABLED = HT20 only * NL80211_SEC_CHAN_BELOW = secondary channel is below the primary channel * NL80211_SEC_CHAN_ABOVE = secondary channel is above the primary channel - * + * @NL80211_ATTR_WIPHY_HT: included with NL80211_ATTR_WIPHY_FREQ, + * specifies whether HT is enabled for the channel * @NL80211_ATTR_IFINDEX: network interface index of the device to operate on * @NL80211_ATTR_IFNAME: network interface name * @NL80211_ATTR_IFTYPE: type of virtual interface, see &enum nl80211_iftype @@ -345,6 +343,7 @@ enum nl80211_attrs { NL80211_ATTR_WIPHY_TXQ_PARAMS, NL80211_ATTR_WIPHY_FREQ, NL80211_ATTR_WIPHY_SEC_CHAN_OFFSET, + NL80211_ATTR_WIPHY_HT, /* add attributes here, update the policy in nl80211.c */ @@ -775,7 +774,6 @@ enum nl80211_txq_q { }; enum nl80211_sec_chan_offset { - NL80211_SEC_CHAN_NO_HT /* No HT */, NL80211_SEC_CHAN_DISABLED /* HT20 only */, NL80211_SEC_CHAN_BELOW /* HT40- */, NL80211_SEC_CHAN_ABOVE /* HT40+ */ diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index a0c0bf1..775819b 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -523,6 +523,7 @@ struct cfg80211_ops { int (*set_channel)(struct wiphy *wiphy, struct ieee80211_channel *chan, + bool enable_ht, enum nl80211_sec_chan_offset); }; diff --git a/include/net/mac80211.h b/include/net/mac80211.h index e84c922..23914a5 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -165,14 +165,9 @@ enum ieee80211_bss_change { /** * struct ieee80211_bss_ht_conf - BSS's changing HT configuration - * @secondary_channel_offset: secondary channel offset, uses - * %IEEE80211_HT_PARAM_CHA_SEC_ values - * @width_40_ok: indicates that 40 MHz bandwidth may be used for TX * @operation_mode: HT operation mode (like in &struct ieee80211_ht_info) */ struct ieee80211_bss_ht_conf { - u8 secondary_channel_offset; - bool width_40_ok; u16 operation_mode; }; @@ -508,9 +503,7 @@ static inline int __deprecated __IEEE80211_CONF_SHORT_SLOT_TIME(void) struct ieee80211_ht_conf { bool enabled; - int sec_chan_offset; /* 0 = HT40 disabled; -1 = HT40 enabled, secondary - * channel below primary; 1 = HT40 enabled, - * secondary channel above primary */ + enum nl80211_sec_chan_offset sec_chan_offset; }; /** diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 7a7a6c1..0a5b24b 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -1097,11 +1097,13 @@ static int ieee80211_set_txq_params(struct wiphy *wiphy, static int ieee80211_set_channel(struct wiphy *wiphy, struct ieee80211_channel *chan, + bool enable_ht, enum nl80211_sec_chan_offset sec_chan_offset) { struct ieee80211_local *local = wiphy_priv(wiphy); local->oper_channel = chan; + local->oper_ht = enable_ht; local->oper_sec_chan_offset = sec_chan_offset; return ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); diff --git a/net/mac80211/ht.c b/net/mac80211/ht.c index ece79ae..76616fe 100644 --- a/net/mac80211/ht.c +++ b/net/mac80211/ht.c @@ -84,63 +84,6 @@ void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband, ht_cap->mcs.rx_mask[32/8] |= 1; } -/* - * ieee80211_enable_ht should be called only after the operating band - * has been determined as ht configuration depends on the hw's - * HT abilities for a specific band. - */ -u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata, - struct ieee80211_ht_info *hti, - u16 ap_ht_cap_flags) -{ - struct ieee80211_local *local = sdata->local; - struct ieee80211_supported_band *sband; - struct ieee80211_bss_ht_conf ht; - u32 changed = 0; - bool enable_ht = true, ht_changed; - - sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; - - memset(&ht, 0, sizeof(ht)); - - /* HT is not supported */ - if (!sband->ht_cap.ht_supported) - enable_ht = false; - - /* check that channel matches the right operating channel */ - if (local->hw.conf.channel->center_freq != - ieee80211_channel_to_frequency(hti->control_chan)) - enable_ht = false; - - /* - * XXX: This is totally incorrect when there are multiple virtual - * interfaces, needs to be fixed later. - */ - ht_changed = local->hw.conf.ht.enabled != enable_ht; - local->hw.conf.ht.enabled = enable_ht; - if (ht_changed) - ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_HT); - - /* disable HT */ - if (!enable_ht) - return 0; - ht.secondary_channel_offset = - hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET; - ht.width_40_ok = - !(ap_ht_cap_flags & IEEE80211_HT_CAP_40MHZ_INTOLERANT) && - (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) && - (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY); - ht.operation_mode = le16_to_cpu(hti->operation_mode); - - /* if bss configuration changed store the new one */ - if (memcmp(&sdata->vif.bss_conf.ht, &ht, sizeof(ht))) { - changed |= BSS_CHANGED_HT; - sdata->vif.bss_conf.ht = ht; - } - - return changed; -} - static void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata, const u8 *da, u16 tid, u8 dialog_token, u16 start_seq_num, diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index 527205f..e43391a 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -626,6 +626,7 @@ struct ieee80211_local { struct delayed_work scan_work; struct ieee80211_sub_if_data *scan_sdata; struct ieee80211_channel *oper_channel, *scan_channel; + bool oper_ht; enum nl80211_sec_chan_offset oper_sec_chan_offset; u8 scan_ssid[IEEE80211_MAX_SSID_LEN]; size_t scan_ssid_len; @@ -929,9 +930,6 @@ int ieee80211_subif_start_xmit(struct sk_buff *skb, struct net_device *dev); void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband, struct ieee80211_ht_cap *ht_cap_ie, struct ieee80211_sta_ht_cap *ht_cap); -u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata, - struct ieee80211_ht_info *hti, - u16 ap_ht_cap_flags); void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn); void ieee80211_sta_stop_rx_ba_session(struct ieee80211_sub_if_data *sdata, u8 *da, diff --git a/net/mac80211/main.c b/net/mac80211/main.c index 29c3ecf..57bad73 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -195,39 +195,27 @@ int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) struct ieee80211_channel *chan; int ret = 0; int power; + bool enable_ht; enum nl80211_sec_chan_offset sec_chan_offset; might_sleep(); if (local->sw_scanning) { chan = local->scan_channel; - sec_chan_offset = NL80211_SEC_CHAN_NO_HT; + enable_ht = false; + sec_chan_offset = NL80211_SEC_CHAN_DISABLED; } else { chan = local->oper_channel; + enable_ht = local->oper_ht; sec_chan_offset = local->oper_sec_chan_offset; } if (chan != local->hw.conf.channel || + enable_ht != local->hw.conf.ht.enabled || sec_chan_offset != local->hw.conf.ht.sec_chan_offset) { local->hw.conf.channel = chan; - switch (sec_chan_offset) { - case NL80211_SEC_CHAN_NO_HT: - local->hw.conf.ht.enabled = false; - local->hw.conf.ht.sec_chan_offset = 0; - break; - case NL80211_SEC_CHAN_DISABLED: - local->hw.conf.ht.enabled = true; - local->hw.conf.ht.sec_chan_offset = 0; - break; - case NL80211_SEC_CHAN_BELOW: - local->hw.conf.ht.enabled = true; - local->hw.conf.ht.sec_chan_offset = -1; - break; - case NL80211_SEC_CHAN_ABOVE: - local->hw.conf.ht.enabled = true; - local->hw.conf.ht.sec_chan_offset = 1; - break; - } + local->hw.conf.ht.sec_chan_offset = sec_chan_offset; + local->hw.conf.ht.enabled = enable_ht; changed |= IEEE80211_CONF_CHANGE_CHANNEL; } diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index 07b0cc3..43fb2f8 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -863,7 +863,8 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, rcu_read_unlock(); - local->hw.conf.ht.enabled = false; + local->oper_ht = false; + local->oper_sec_chan_offset = NL80211_SEC_CHAN_DISABLED; ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_HT); ieee80211_bss_info_change_notify(sdata, changed); @@ -1192,6 +1193,71 @@ static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, ieee80211_set_disassoc(sdata, ifsta, false, false, reason_code); } +/* + * ieee80211_enable_ht should be called only after the operating band + * has been determined as ht configuration depends on the hw's + * HT abilities for a specific band. + */ +static u32 ieee80211_enable_ht(struct ieee80211_sub_if_data *sdata, + struct ieee80211_ht_info *hti, + u16 ap_ht_cap_flags) +{ + struct ieee80211_local *local = sdata->local; + struct ieee80211_supported_band *sband; + struct ieee80211_bss_ht_conf ht; + u32 changed = 0; + bool enable_ht = true, ht_changed; + s8 secchan = NL80211_SEC_CHAN_DISABLED; + + sband = local->hw.wiphy->bands[local->hw.conf.channel->band]; + + memset(&ht, 0, sizeof(ht)); + + /* HT is not supported */ + if (!sband->ht_cap.ht_supported) + enable_ht = false; + + /* check that channel matches the right operating channel */ + if (local->hw.conf.channel->center_freq != + ieee80211_channel_to_frequency(hti->control_chan)) + enable_ht = false; + + if (enable_ht && + (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) && + (hti->ht_param & IEEE80211_HT_PARAM_CHAN_WIDTH_ANY)) { + switch (hti->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { + case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: + secchan = NL80211_SEC_CHAN_ABOVE; + break; + case IEEE80211_HT_PARAM_CHA_SEC_BELOW: + secchan = NL80211_SEC_CHAN_BELOW; + break; + } + } + + ht_changed = local->hw.conf.ht.enabled != enable_ht || + secchan != local->hw.conf.ht.sec_chan_offset; + + local->oper_sec_chan_offset = secchan; + local->oper_ht = enable_ht; + + if (ht_changed) + ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_HT); + + /* disable HT */ + if (!enable_ht) + return 0; + + ht.operation_mode = le16_to_cpu(hti->operation_mode); + + /* if bss configuration changed store the new one */ + if (memcmp(&sdata->vif.bss_conf.ht, &ht, sizeof(ht))) { + changed |= BSS_CHANGED_HT; + sdata->vif.bss_conf.ht = ht; + } + + return changed; +} static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, struct ieee80211_if_sta *ifsta, diff --git a/net/mac80211/util.c b/net/mac80211/util.c index 505d68f..c7beb7a 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -641,7 +641,8 @@ int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freqMHz) chan->flags & IEEE80211_CHAN_NO_IBSS) return ret; local->oper_channel = chan; - local->oper_sec_chan_offset = NL80211_SEC_CHAN_NO_HT; + local->oper_ht = false; + local->oper_sec_chan_offset = NL80211_SEC_CHAN_DISABLED; if (local->sw_scanning || local->hw_scanning) ret = 0; diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 9caee60..f17b4aa 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -60,6 +60,7 @@ static struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] __read_mostly = { .len = BUS_ID_SIZE-1 }, [NL80211_ATTR_WIPHY_TXQ_PARAMS] = { .type = NLA_NESTED }, [NL80211_ATTR_WIPHY_FREQ] = { .type = NLA_U32 }, + [NL80211_ATTR_WIPHY_HT] = { .type = NLA_U8 }, [NL80211_ATTR_WIPHY_SEC_CHAN_OFFSET] = { .type = NLA_U32 }, [NL80211_ATTR_IFTYPE] = { .type = NLA_U32 }, @@ -363,21 +364,24 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info) if (info->attrs[NL80211_ATTR_WIPHY_FREQ]) { enum nl80211_sec_chan_offset sec_chan_offset = - NL80211_SEC_CHAN_NO_HT; + NL80211_SEC_CHAN_DISABLED; struct ieee80211_channel *chan; u32 freq, sec_freq; + bool enable_ht = false; if (!rdev->ops->set_channel) { result = -EOPNOTSUPP; goto bad_res; } - if (info->attrs[NL80211_ATTR_WIPHY_SEC_CHAN_OFFSET]) { + if (info->attrs[NL80211_ATTR_WIPHY_HT]) + enable_ht = nla_get_u8(info->attrs[NL80211_ATTR_WIPHY_HT]); + + if (enable_ht && info->attrs[NL80211_ATTR_WIPHY_SEC_CHAN_OFFSET]) { sec_chan_offset = nla_get_u32( info->attrs[ NL80211_ATTR_WIPHY_SEC_CHAN_OFFSET]); - if (sec_chan_offset != NL80211_SEC_CHAN_NO_HT && - sec_chan_offset != NL80211_SEC_CHAN_DISABLED && + if (sec_chan_offset != NL80211_SEC_CHAN_DISABLED && sec_chan_offset != NL80211_SEC_CHAN_BELOW && sec_chan_offset != NL80211_SEC_CHAN_ABOVE) { result = -EINVAL; @@ -409,7 +413,7 @@ static int nl80211_set_wiphy(struct sk_buff *skb, struct genl_info *info) } } - result = rdev->ops->set_channel(&rdev->wiphy, chan, + result = rdev->ops->set_channel(&rdev->wiphy, chan, enable_ht, sec_chan_offset); if (result) goto bad_res; -- 1.6.0.3