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-rw-r--r--net/mac80211/ht.c364
1 files changed, 293 insertions, 71 deletions
diff --git a/net/mac80211/ht.c b/net/mac80211/ht.c
index 75d679d75e6..15702ff64a4 100644
--- a/net/mac80211/ht.c
+++ b/net/mac80211/ht.c
@@ -14,25 +14,150 @@
*/
#include <linux/ieee80211.h>
+#include <linux/export.h>
#include <net/mac80211.h>
#include "ieee80211_i.h"
#include "rate.h"
-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)
+static void __check_htcap_disable(struct ieee80211_ht_cap *ht_capa,
+ struct ieee80211_ht_cap *ht_capa_mask,
+ struct ieee80211_sta_ht_cap *ht_cap,
+ u16 flag)
{
+ __le16 le_flag = cpu_to_le16(flag);
+ if (ht_capa_mask->cap_info & le_flag) {
+ if (!(ht_capa->cap_info & le_flag))
+ ht_cap->cap &= ~flag;
+ }
+}
+
+static void __check_htcap_enable(struct ieee80211_ht_cap *ht_capa,
+ struct ieee80211_ht_cap *ht_capa_mask,
+ struct ieee80211_sta_ht_cap *ht_cap,
+ u16 flag)
+{
+ __le16 le_flag = cpu_to_le16(flag);
+
+ if ((ht_capa_mask->cap_info & le_flag) &&
+ (ht_capa->cap_info & le_flag))
+ ht_cap->cap |= flag;
+}
+
+void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
+ struct ieee80211_sta_ht_cap *ht_cap)
+{
+ struct ieee80211_ht_cap *ht_capa, *ht_capa_mask;
+ u8 *scaps, *smask;
+ int i;
+
+ if (!ht_cap->ht_supported)
+ return;
+
+ switch (sdata->vif.type) {
+ case NL80211_IFTYPE_STATION:
+ ht_capa = &sdata->u.mgd.ht_capa;
+ ht_capa_mask = &sdata->u.mgd.ht_capa_mask;
+ break;
+ case NL80211_IFTYPE_ADHOC:
+ ht_capa = &sdata->u.ibss.ht_capa;
+ ht_capa_mask = &sdata->u.ibss.ht_capa_mask;
+ break;
+ default:
+ WARN_ON_ONCE(1);
+ return;
+ }
+
+ scaps = (u8 *)(&ht_capa->mcs.rx_mask);
+ smask = (u8 *)(&ht_capa_mask->mcs.rx_mask);
+
+ /* NOTE: If you add more over-rides here, update register_hw
+ * ht_capa_mod_mask logic in main.c as well.
+ * And, if this method can ever change ht_cap.ht_supported, fix
+ * the check in ieee80211_add_ht_ie.
+ */
+
+ /* check for HT over-rides, MCS rates first. */
+ for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) {
+ u8 m = smask[i];
+ ht_cap->mcs.rx_mask[i] &= ~m; /* turn off all masked bits */
+ /* Add back rates that are supported */
+ ht_cap->mcs.rx_mask[i] |= (m & scaps[i]);
+ }
+
+ /* Force removal of HT-40 capabilities? */
+ __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap,
+ IEEE80211_HT_CAP_SUP_WIDTH_20_40);
+ __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap,
+ IEEE80211_HT_CAP_SGI_40);
+
+ /* Allow user to disable SGI-20 (SGI-40 is handled above) */
+ __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap,
+ IEEE80211_HT_CAP_SGI_20);
+
+ /* Allow user to disable the max-AMSDU bit. */
+ __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap,
+ IEEE80211_HT_CAP_MAX_AMSDU);
+
+ /* Allow user to disable LDPC */
+ __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap,
+ IEEE80211_HT_CAP_LDPC_CODING);
+
+ /* Allow user to enable 40 MHz intolerant bit. */
+ __check_htcap_enable(ht_capa, ht_capa_mask, ht_cap,
+ IEEE80211_HT_CAP_40MHZ_INTOLERANT);
+
+ /* Allow user to decrease AMPDU factor */
+ if (ht_capa_mask->ampdu_params_info &
+ IEEE80211_HT_AMPDU_PARM_FACTOR) {
+ u8 n = ht_capa->ampdu_params_info &
+ IEEE80211_HT_AMPDU_PARM_FACTOR;
+ if (n < ht_cap->ampdu_factor)
+ ht_cap->ampdu_factor = n;
+ }
+
+ /* Allow the user to increase AMPDU density. */
+ if (ht_capa_mask->ampdu_params_info &
+ IEEE80211_HT_AMPDU_PARM_DENSITY) {
+ u8 n = (ht_capa->ampdu_params_info &
+ IEEE80211_HT_AMPDU_PARM_DENSITY)
+ >> IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT;
+ if (n > ht_cap->ampdu_density)
+ ht_cap->ampdu_density = n;
+ }
+}
+
+
+bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
+ struct ieee80211_supported_band *sband,
+ const struct ieee80211_ht_cap *ht_cap_ie,
+ struct sta_info *sta)
+{
+ struct ieee80211_sta_ht_cap ht_cap, own_cap;
u8 ampdu_info, tx_mcs_set_cap;
int i, max_tx_streams;
+ bool changed;
+ enum ieee80211_sta_rx_bandwidth bw;
+ enum ieee80211_smps_mode smps_mode;
- BUG_ON(!ht_cap);
-
- memset(ht_cap, 0, sizeof(*ht_cap));
+ memset(&ht_cap, 0, sizeof(ht_cap));
if (!ht_cap_ie || !sband->ht_cap.ht_supported)
- return;
+ goto apply;
- ht_cap->ht_supported = true;
+ ht_cap.ht_supported = true;
+
+ own_cap = sband->ht_cap;
+
+ /*
+ * If user has specified capability over-rides, take care
+ * of that if the station we're setting up is the AP that
+ * we advertised a restricted capability set to. Override
+ * our own capabilities and then use those below.
+ */
+ if ((sdata->vif.type == NL80211_IFTYPE_STATION ||
+ sdata->vif.type == NL80211_IFTYPE_ADHOC) &&
+ !test_sta_flag(sta, WLAN_STA_TDLS_PEER))
+ ieee80211_apply_htcap_overrides(sdata, &own_cap);
/*
* The bits listed in this expression should be
@@ -40,35 +165,38 @@ void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
* advertises more then we can't use those thus
* we mask them out.
*/
- ht_cap->cap = le16_to_cpu(ht_cap_ie->cap_info) &
- (sband->ht_cap.cap |
- ~(IEEE80211_HT_CAP_LDPC_CODING |
- IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
- IEEE80211_HT_CAP_GRN_FLD |
- IEEE80211_HT_CAP_SGI_20 |
- IEEE80211_HT_CAP_SGI_40 |
- IEEE80211_HT_CAP_DSSSCCK40));
+ ht_cap.cap = le16_to_cpu(ht_cap_ie->cap_info) &
+ (own_cap.cap | ~(IEEE80211_HT_CAP_LDPC_CODING |
+ IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
+ IEEE80211_HT_CAP_GRN_FLD |
+ IEEE80211_HT_CAP_SGI_20 |
+ IEEE80211_HT_CAP_SGI_40 |
+ IEEE80211_HT_CAP_DSSSCCK40));
+
/*
* The STBC bits are asymmetric -- if we don't have
* TX then mask out the peer's RX and vice versa.
*/
- if (!(sband->ht_cap.cap & IEEE80211_HT_CAP_TX_STBC))
- ht_cap->cap &= ~IEEE80211_HT_CAP_RX_STBC;
- if (!(sband->ht_cap.cap & IEEE80211_HT_CAP_RX_STBC))
- ht_cap->cap &= ~IEEE80211_HT_CAP_TX_STBC;
+ if (!(own_cap.cap & IEEE80211_HT_CAP_TX_STBC))
+ ht_cap.cap &= ~IEEE80211_HT_CAP_RX_STBC;
+ if (!(own_cap.cap & IEEE80211_HT_CAP_RX_STBC))
+ ht_cap.cap &= ~IEEE80211_HT_CAP_TX_STBC;
ampdu_info = ht_cap_ie->ampdu_params_info;
- ht_cap->ampdu_factor =
+ ht_cap.ampdu_factor =
ampdu_info & IEEE80211_HT_AMPDU_PARM_FACTOR;
- ht_cap->ampdu_density =
+ ht_cap.ampdu_density =
(ampdu_info & IEEE80211_HT_AMPDU_PARM_DENSITY) >> 2;
/* own MCS TX capabilities */
- tx_mcs_set_cap = sband->ht_cap.mcs.tx_params;
+ tx_mcs_set_cap = own_cap.mcs.tx_params;
+
+ /* Copy peer MCS TX capabilities, the driver might need them. */
+ ht_cap.mcs.tx_params = ht_cap_ie->mcs.tx_params;
/* can we TX with MCS rates? */
if (!(tx_mcs_set_cap & IEEE80211_HT_MCS_TX_DEFINED))
- return;
+ goto apply;
/* Counting from 0, therefore +1 */
if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_RX_DIFF)
@@ -79,38 +207,91 @@ void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
max_tx_streams = IEEE80211_HT_MCS_TX_MAX_STREAMS;
/*
- * 802.11n D5.0 20.3.5 / 20.6 says:
+ * 802.11n-2009 20.3.5 / 20.6 says:
* - indices 0 to 7 and 32 are single spatial stream
* - 8 to 31 are multiple spatial streams using equal modulation
* [8..15 for two streams, 16..23 for three and 24..31 for four]
* - remainder are multiple spatial streams using unequal modulation
*/
for (i = 0; i < max_tx_streams; i++)
- ht_cap->mcs.rx_mask[i] =
- sband->ht_cap.mcs.rx_mask[i] & ht_cap_ie->mcs.rx_mask[i];
+ ht_cap.mcs.rx_mask[i] =
+ own_cap.mcs.rx_mask[i] & ht_cap_ie->mcs.rx_mask[i];
if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_UNEQUAL_MODULATION)
for (i = IEEE80211_HT_MCS_UNEQUAL_MODULATION_START_BYTE;
i < IEEE80211_HT_MCS_MASK_LEN; i++)
- ht_cap->mcs.rx_mask[i] =
- sband->ht_cap.mcs.rx_mask[i] &
+ ht_cap.mcs.rx_mask[i] =
+ own_cap.mcs.rx_mask[i] &
ht_cap_ie->mcs.rx_mask[i];
/* handle MCS rate 32 too */
- if (sband->ht_cap.mcs.rx_mask[32/8] & ht_cap_ie->mcs.rx_mask[32/8] & 1)
- ht_cap->mcs.rx_mask[32/8] |= 1;
+ if (own_cap.mcs.rx_mask[32/8] & ht_cap_ie->mcs.rx_mask[32/8] & 1)
+ ht_cap.mcs.rx_mask[32/8] |= 1;
+
+ apply:
+ changed = memcmp(&sta->sta.ht_cap, &ht_cap, sizeof(ht_cap));
+
+ memcpy(&sta->sta.ht_cap, &ht_cap, sizeof(ht_cap));
+
+ switch (sdata->vif.bss_conf.chandef.width) {
+ default:
+ WARN_ON_ONCE(1);
+ /* fall through */
+ case NL80211_CHAN_WIDTH_20_NOHT:
+ case NL80211_CHAN_WIDTH_20:
+ bw = IEEE80211_STA_RX_BW_20;
+ break;
+ case NL80211_CHAN_WIDTH_40:
+ case NL80211_CHAN_WIDTH_80:
+ case NL80211_CHAN_WIDTH_80P80:
+ case NL80211_CHAN_WIDTH_160:
+ bw = ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
+ IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20;
+ break;
+ }
+
+ if (bw != sta->sta.bandwidth)
+ changed = true;
+ sta->sta.bandwidth = bw;
+
+ sta->cur_max_bandwidth =
+ ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
+ IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20;
+
+ switch ((ht_cap.cap & IEEE80211_HT_CAP_SM_PS)
+ >> IEEE80211_HT_CAP_SM_PS_SHIFT) {
+ case WLAN_HT_CAP_SM_PS_INVALID:
+ case WLAN_HT_CAP_SM_PS_STATIC:
+ smps_mode = IEEE80211_SMPS_STATIC;
+ break;
+ case WLAN_HT_CAP_SM_PS_DYNAMIC:
+ smps_mode = IEEE80211_SMPS_DYNAMIC;
+ break;
+ case WLAN_HT_CAP_SM_PS_DISABLED:
+ smps_mode = IEEE80211_SMPS_OFF;
+ break;
+ }
+
+ if (smps_mode != sta->sta.smps_mode)
+ changed = true;
+ sta->sta.smps_mode = smps_mode;
+
+ return changed;
}
-void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta, bool tx)
+void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta,
+ enum ieee80211_agg_stop_reason reason)
{
int i;
cancel_work_sync(&sta->ampdu_mlme.work);
- for (i = 0; i < STA_TID_NUM; i++) {
- __ieee80211_stop_tx_ba_session(sta, i, WLAN_BACK_INITIATOR, tx);
+ for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
+ __ieee80211_stop_tx_ba_session(sta, i, reason);
__ieee80211_stop_rx_ba_session(sta, i, WLAN_BACK_RECIPIENT,
- WLAN_REASON_QSTA_LEAVE_QBSS, tx);
+ WLAN_REASON_QSTA_LEAVE_QBSS,
+ reason != AGG_STOP_DESTROY_STA &&
+ reason != AGG_STOP_PEER_REQUEST);
}
}
@@ -127,27 +308,49 @@ void ieee80211_ba_session_work(struct work_struct *work)
* down by the code that set the flag, so this
* need not run.
*/
- if (test_sta_flags(sta, WLAN_STA_BLOCK_BA))
+ if (test_sta_flag(sta, WLAN_STA_BLOCK_BA))
return;
mutex_lock(&sta->ampdu_mlme.mtx);
- for (tid = 0; tid < STA_TID_NUM; tid++) {
+ for (tid = 0; tid < IEEE80211_NUM_TIDS; tid++) {
if (test_and_clear_bit(tid, sta->ampdu_mlme.tid_rx_timer_expired))
___ieee80211_stop_rx_ba_session(
sta, tid, WLAN_BACK_RECIPIENT,
WLAN_REASON_QSTA_TIMEOUT, true);
- tid_tx = sta->ampdu_mlme.tid_tx[tid];
- if (!tid_tx)
- continue;
+ if (test_and_clear_bit(tid,
+ sta->ampdu_mlme.tid_rx_stop_requested))
+ ___ieee80211_stop_rx_ba_session(
+ sta, tid, WLAN_BACK_RECIPIENT,
+ WLAN_REASON_UNSPECIFIED, true);
+
+ spin_lock_bh(&sta->lock);
+
+ tid_tx = sta->ampdu_mlme.tid_start_tx[tid];
+ if (tid_tx) {
+ /*
+ * Assign it over to the normal tid_tx array
+ * where it "goes live".
+ */
+
+ sta->ampdu_mlme.tid_start_tx[tid] = NULL;
+ /* could there be a race? */
+ if (sta->ampdu_mlme.tid_tx[tid])
+ kfree(tid_tx);
+ else
+ ieee80211_assign_tid_tx(sta, tid, tid_tx);
+ spin_unlock_bh(&sta->lock);
- if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state))
ieee80211_tx_ba_session_handle_start(sta, tid);
- else if (test_and_clear_bit(HT_AGG_STATE_WANT_STOP,
- &tid_tx->state))
+ continue;
+ }
+ spin_unlock_bh(&sta->lock);
+
+ tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
+ if (tid_tx && test_and_clear_bit(HT_AGG_STATE_WANT_STOP,
+ &tid_tx->state))
___ieee80211_stop_tx_ba_session(sta, tid,
- WLAN_BACK_INITIATOR,
- true);
+ AGG_STOP_LOCAL_REQUEST);
}
mutex_unlock(&sta->ampdu_mlme.mtx);
}
@@ -162,12 +365,8 @@ void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
u16 params;
skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
-
- if (!skb) {
- printk(KERN_ERR "%s: failed to allocate buffer "
- "for delba frame\n", sdata->name);
+ if (!skb)
return;
- }
skb_reserve(skb, local->hw.extra_tx_headroom);
mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
@@ -175,10 +374,13 @@ void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
memcpy(mgmt->da, da, ETH_ALEN);
memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
if (sdata->vif.type == NL80211_IFTYPE_AP ||
- sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
+ sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
+ sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
else if (sdata->vif.type == NL80211_IFTYPE_STATION)
memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN);
+ else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
+ memcpy(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN);
mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
IEEE80211_STYPE_ACTION);
@@ -207,19 +409,16 @@ void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
-#ifdef CONFIG_MAC80211_HT_DEBUG
- if (net_ratelimit())
- printk(KERN_DEBUG "delba from %pM (%s) tid %d reason code %d\n",
- mgmt->sa, initiator ? "initiator" : "recipient", tid,
- le16_to_cpu(mgmt->u.action.u.delba.reason_code));
-#endif /* CONFIG_MAC80211_HT_DEBUG */
+ ht_dbg_ratelimited(sdata, "delba from %pM (%s) tid %d reason code %d\n",
+ mgmt->sa, initiator ? "initiator" : "recipient",
+ tid,
+ le16_to_cpu(mgmt->u.action.u.delba.reason_code));
if (initiator == WLAN_BACK_INITIATOR)
__ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_INITIATOR, 0,
true);
else
- __ieee80211_stop_tx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
- true);
+ __ieee80211_stop_tx_ba_session(sta, tid, AGG_STOP_PEER_REQUEST);
}
int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
@@ -269,15 +468,28 @@ int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
return 0;
}
-void ieee80211_request_smps_work(struct work_struct *work)
+void ieee80211_request_smps_mgd_work(struct work_struct *work)
{
struct ieee80211_sub_if_data *sdata =
container_of(work, struct ieee80211_sub_if_data,
u.mgd.request_smps_work);
- mutex_lock(&sdata->u.mgd.mtx);
- __ieee80211_request_smps(sdata, sdata->u.mgd.driver_smps_mode);
- mutex_unlock(&sdata->u.mgd.mtx);
+ sdata_lock(sdata);
+ __ieee80211_request_smps_mgd(sdata, sdata->u.mgd.driver_smps_mode);
+ sdata_unlock(sdata);
+}
+
+void ieee80211_request_smps_ap_work(struct work_struct *work)
+{
+ struct ieee80211_sub_if_data *sdata =
+ container_of(work, struct ieee80211_sub_if_data,
+ u.ap.request_smps_work);
+
+ sdata_lock(sdata);
+ if (sdata_dereference(sdata->u.ap.beacon, sdata))
+ __ieee80211_request_smps_ap(sdata,
+ sdata->u.ap.driver_smps_mode);
+ sdata_unlock(sdata);
}
void ieee80211_request_smps(struct ieee80211_vif *vif,
@@ -285,16 +497,26 @@ void ieee80211_request_smps(struct ieee80211_vif *vif,
{
struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
- if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
+ if (WARN_ON_ONCE(vif->type != NL80211_IFTYPE_STATION &&
+ vif->type != NL80211_IFTYPE_AP))
return;
- if (WARN_ON(smps_mode == IEEE80211_SMPS_OFF))
- smps_mode = IEEE80211_SMPS_AUTOMATIC;
-
- sdata->u.mgd.driver_smps_mode = smps_mode;
-
- ieee80211_queue_work(&sdata->local->hw,
- &sdata->u.mgd.request_smps_work);
+ if (vif->type == NL80211_IFTYPE_STATION) {
+ if (sdata->u.mgd.driver_smps_mode == smps_mode)
+ return;
+ sdata->u.mgd.driver_smps_mode = smps_mode;
+ ieee80211_queue_work(&sdata->local->hw,
+ &sdata->u.mgd.request_smps_work);
+ } else {
+ /* AUTOMATIC is meaningless in AP mode */
+ if (WARN_ON_ONCE(smps_mode == IEEE80211_SMPS_AUTOMATIC))
+ return;
+ if (sdata->u.ap.driver_smps_mode == smps_mode)
+ return;
+ sdata->u.ap.driver_smps_mode = smps_mode;
+ ieee80211_queue_work(&sdata->local->hw,
+ &sdata->u.ap.request_smps_work);
+ }
}
/* this might change ... don't want non-open drivers using it */
EXPORT_SYMBOL_GPL(ieee80211_request_smps);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-03 18:28:34 +0000