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524 lines
14 KiB
524 lines
14 KiB
/* |
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* Copyright (c) 2010-2011 Atheros Communications Inc. |
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* |
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* Permission to use, copy, modify, and/or distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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|
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#include "htc.h" |
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|
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#define FUDGE 2 |
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|
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void ath9k_htc_beaconq_config(struct ath9k_htc_priv *priv) |
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{ |
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struct ath_hw *ah = priv->ah; |
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struct ath9k_tx_queue_info qi, qi_be; |
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memset(&qi, 0, sizeof(struct ath9k_tx_queue_info)); |
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memset(&qi_be, 0, sizeof(struct ath9k_tx_queue_info)); |
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ath9k_hw_get_txq_props(ah, priv->beacon.beaconq, &qi); |
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if (priv->ah->opmode == NL80211_IFTYPE_AP || |
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priv->ah->opmode == NL80211_IFTYPE_MESH_POINT) { |
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qi.tqi_aifs = 1; |
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qi.tqi_cwmin = 0; |
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qi.tqi_cwmax = 0; |
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} else if (priv->ah->opmode == NL80211_IFTYPE_ADHOC) { |
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int qnum = priv->hwq_map[IEEE80211_AC_BE]; |
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ath9k_hw_get_txq_props(ah, qnum, &qi_be); |
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qi.tqi_aifs = qi_be.tqi_aifs; |
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/* |
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* For WIFI Beacon Distribution |
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* Long slot time : 2x cwmin |
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* Short slot time : 4x cwmin |
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*/ |
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if (ah->slottime == 20) |
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qi.tqi_cwmin = 2*qi_be.tqi_cwmin; |
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else |
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qi.tqi_cwmin = 4*qi_be.tqi_cwmin; |
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qi.tqi_cwmax = qi_be.tqi_cwmax; |
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} |
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if (!ath9k_hw_set_txq_props(ah, priv->beacon.beaconq, &qi)) { |
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ath_err(ath9k_hw_common(ah), |
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"Unable to update beacon queue %u!\n", priv->beacon.beaconq); |
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} else { |
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ath9k_hw_resettxqueue(ah, priv->beacon.beaconq); |
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} |
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} |
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/* |
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* Both nexttbtt and intval have to be in usecs. |
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*/ |
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static void ath9k_htc_beacon_init(struct ath9k_htc_priv *priv, |
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struct ath_beacon_config *conf, |
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bool reset_tsf) |
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{ |
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struct ath_hw *ah = priv->ah; |
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int ret __attribute__ ((unused)); |
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__be32 htc_imask = 0; |
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u8 cmd_rsp; |
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if (conf->intval >= TU_TO_USEC(DEFAULT_SWBA_RESPONSE)) |
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ah->config.sw_beacon_response_time = DEFAULT_SWBA_RESPONSE; |
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else |
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ah->config.sw_beacon_response_time = MIN_SWBA_RESPONSE; |
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WMI_CMD(WMI_DISABLE_INTR_CMDID); |
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if (reset_tsf) |
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ath9k_hw_reset_tsf(ah); |
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ath9k_htc_beaconq_config(priv); |
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ath9k_hw_beaconinit(ah, conf->nexttbtt, conf->intval); |
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priv->beacon.bmisscnt = 0; |
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htc_imask = cpu_to_be32(ah->imask); |
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WMI_CMD_BUF(WMI_ENABLE_INTR_CMDID, &htc_imask); |
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} |
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static void ath9k_htc_beacon_config_sta(struct ath9k_htc_priv *priv, |
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struct ath_beacon_config *bss_conf) |
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{ |
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struct ath9k_beacon_state bs; |
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enum ath9k_int imask = 0; |
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__be32 htc_imask = 0; |
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int ret __attribute__ ((unused)); |
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u8 cmd_rsp; |
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if (ath9k_cmn_beacon_config_sta(priv->ah, bss_conf, &bs) == -EPERM) |
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return; |
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WMI_CMD(WMI_DISABLE_INTR_CMDID); |
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ath9k_hw_set_sta_beacon_timers(priv->ah, &bs); |
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imask |= ATH9K_INT_BMISS; |
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htc_imask = cpu_to_be32(imask); |
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WMI_CMD_BUF(WMI_ENABLE_INTR_CMDID, &htc_imask); |
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} |
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static void ath9k_htc_beacon_config_ap(struct ath9k_htc_priv *priv, |
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struct ath_beacon_config *conf) |
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{ |
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struct ath_hw *ah = priv->ah; |
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ah->imask = 0; |
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ath9k_cmn_beacon_config_ap(ah, conf, ATH9K_HTC_MAX_BCN_VIF); |
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ath9k_htc_beacon_init(priv, conf, false); |
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} |
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static void ath9k_htc_beacon_config_adhoc(struct ath9k_htc_priv *priv, |
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struct ath_beacon_config *conf) |
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{ |
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struct ath_hw *ah = priv->ah; |
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ah->imask = 0; |
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ath9k_cmn_beacon_config_adhoc(ah, conf); |
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ath9k_htc_beacon_init(priv, conf, conf->ibss_creator); |
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} |
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void ath9k_htc_beaconep(void *drv_priv, struct sk_buff *skb, |
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enum htc_endpoint_id ep_id, bool txok) |
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{ |
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dev_kfree_skb_any(skb); |
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} |
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static void ath9k_htc_send_buffered(struct ath9k_htc_priv *priv, |
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int slot) |
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{ |
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struct ath_common *common = ath9k_hw_common(priv->ah); |
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struct ieee80211_vif *vif; |
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struct sk_buff *skb; |
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struct ieee80211_hdr *hdr; |
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int padpos, padsize, ret, tx_slot; |
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spin_lock_bh(&priv->beacon_lock); |
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vif = priv->beacon.bslot[slot]; |
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skb = ieee80211_get_buffered_bc(priv->hw, vif); |
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while(skb) { |
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hdr = (struct ieee80211_hdr *) skb->data; |
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padpos = ieee80211_hdrlen(hdr->frame_control); |
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padsize = padpos & 3; |
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if (padsize && skb->len > padpos) { |
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if (skb_headroom(skb) < padsize) { |
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dev_kfree_skb_any(skb); |
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goto next; |
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} |
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skb_push(skb, padsize); |
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memmove(skb->data, skb->data + padsize, padpos); |
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} |
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tx_slot = ath9k_htc_tx_get_slot(priv); |
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if (tx_slot < 0) { |
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ath_dbg(common, XMIT, "No free CAB slot\n"); |
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dev_kfree_skb_any(skb); |
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goto next; |
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} |
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ret = ath9k_htc_tx_start(priv, NULL, skb, tx_slot, true); |
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if (ret != 0) { |
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ath9k_htc_tx_clear_slot(priv, tx_slot); |
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dev_kfree_skb_any(skb); |
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ath_dbg(common, XMIT, "Failed to send CAB frame\n"); |
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} else { |
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spin_lock_bh(&priv->tx.tx_lock); |
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priv->tx.queued_cnt++; |
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spin_unlock_bh(&priv->tx.tx_lock); |
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} |
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next: |
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skb = ieee80211_get_buffered_bc(priv->hw, vif); |
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} |
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spin_unlock_bh(&priv->beacon_lock); |
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} |
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static void ath9k_htc_send_beacon(struct ath9k_htc_priv *priv, |
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int slot) |
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{ |
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struct ath_common *common = ath9k_hw_common(priv->ah); |
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struct ieee80211_vif *vif; |
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struct ath9k_htc_vif *avp; |
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struct tx_beacon_header beacon_hdr; |
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struct ath9k_htc_tx_ctl *tx_ctl; |
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struct ieee80211_tx_info *info; |
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struct ieee80211_mgmt *mgmt; |
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struct sk_buff *beacon; |
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u8 *tx_fhdr; |
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int ret; |
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memset(&beacon_hdr, 0, sizeof(struct tx_beacon_header)); |
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spin_lock_bh(&priv->beacon_lock); |
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vif = priv->beacon.bslot[slot]; |
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avp = (struct ath9k_htc_vif *)vif->drv_priv; |
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if (unlikely(test_bit(ATH_OP_SCANNING, &common->op_flags))) { |
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spin_unlock_bh(&priv->beacon_lock); |
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return; |
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} |
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/* Get a new beacon */ |
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beacon = ieee80211_beacon_get(priv->hw, vif); |
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if (!beacon) { |
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spin_unlock_bh(&priv->beacon_lock); |
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return; |
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} |
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/* |
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* Update the TSF adjust value here, the HW will |
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* add this value for every beacon. |
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*/ |
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mgmt = (struct ieee80211_mgmt *)beacon->data; |
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mgmt->u.beacon.timestamp = avp->tsfadjust; |
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info = IEEE80211_SKB_CB(beacon); |
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if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) { |
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struct ieee80211_hdr *hdr = |
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(struct ieee80211_hdr *) beacon->data; |
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avp->seq_no += 0x10; |
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hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); |
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hdr->seq_ctrl |= cpu_to_le16(avp->seq_no); |
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} |
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tx_ctl = HTC_SKB_CB(beacon); |
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memset(tx_ctl, 0, sizeof(*tx_ctl)); |
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tx_ctl->type = ATH9K_HTC_BEACON; |
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tx_ctl->epid = priv->beacon_ep; |
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beacon_hdr.vif_index = avp->index; |
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tx_fhdr = skb_push(beacon, sizeof(beacon_hdr)); |
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memcpy(tx_fhdr, (u8 *) &beacon_hdr, sizeof(beacon_hdr)); |
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ret = htc_send(priv->htc, beacon); |
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if (ret != 0) { |
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if (ret == -ENOMEM) { |
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ath_dbg(common, BSTUCK, |
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"Failed to send beacon, no free TX buffer\n"); |
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} |
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dev_kfree_skb_any(beacon); |
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} |
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spin_unlock_bh(&priv->beacon_lock); |
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ath9k_htc_csa_is_finished(priv); |
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} |
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static int ath9k_htc_choose_bslot(struct ath9k_htc_priv *priv, |
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struct wmi_event_swba *swba) |
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{ |
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struct ath_common *common = ath9k_hw_common(priv->ah); |
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u64 tsf; |
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u32 tsftu; |
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u16 intval; |
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int slot; |
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intval = priv->cur_beacon_conf.beacon_interval; |
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tsf = be64_to_cpu(swba->tsf); |
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tsftu = TSF_TO_TU(tsf >> 32, tsf); |
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slot = ((tsftu % intval) * ATH9K_HTC_MAX_BCN_VIF) / intval; |
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slot = ATH9K_HTC_MAX_BCN_VIF - slot - 1; |
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ath_dbg(common, BEACON, |
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"Choose slot: %d, tsf: %llu, tsftu: %u, intval: %u\n", |
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slot, tsf, tsftu, intval); |
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return slot; |
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} |
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void ath9k_htc_swba(struct ath9k_htc_priv *priv, |
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struct wmi_event_swba *swba) |
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{ |
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struct ath_common *common = ath9k_hw_common(priv->ah); |
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int slot; |
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if (swba->beacon_pending != 0) { |
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priv->beacon.bmisscnt++; |
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if (priv->beacon.bmisscnt > BSTUCK_THRESHOLD) { |
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ath_dbg(common, BSTUCK, "Beacon stuck, HW reset\n"); |
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ieee80211_queue_work(priv->hw, |
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&priv->fatal_work); |
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} |
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return; |
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} |
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if (priv->beacon.bmisscnt) { |
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ath_dbg(common, BSTUCK, |
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"Resuming beacon xmit after %u misses\n", |
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priv->beacon.bmisscnt); |
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priv->beacon.bmisscnt = 0; |
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} |
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slot = ath9k_htc_choose_bslot(priv, swba); |
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spin_lock_bh(&priv->beacon_lock); |
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if (priv->beacon.bslot[slot] == NULL) { |
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spin_unlock_bh(&priv->beacon_lock); |
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return; |
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} |
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spin_unlock_bh(&priv->beacon_lock); |
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ath9k_htc_send_buffered(priv, slot); |
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ath9k_htc_send_beacon(priv, slot); |
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} |
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void ath9k_htc_assign_bslot(struct ath9k_htc_priv *priv, |
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struct ieee80211_vif *vif) |
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{ |
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struct ath_common *common = ath9k_hw_common(priv->ah); |
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struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv; |
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int i = 0; |
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spin_lock_bh(&priv->beacon_lock); |
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for (i = 0; i < ATH9K_HTC_MAX_BCN_VIF; i++) { |
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if (priv->beacon.bslot[i] == NULL) { |
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avp->bslot = i; |
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break; |
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} |
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} |
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priv->beacon.bslot[avp->bslot] = vif; |
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spin_unlock_bh(&priv->beacon_lock); |
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ath_dbg(common, CONFIG, "Added interface at beacon slot: %d\n", |
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avp->bslot); |
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} |
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void ath9k_htc_remove_bslot(struct ath9k_htc_priv *priv, |
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struct ieee80211_vif *vif) |
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{ |
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struct ath_common *common = ath9k_hw_common(priv->ah); |
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struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv; |
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spin_lock_bh(&priv->beacon_lock); |
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priv->beacon.bslot[avp->bslot] = NULL; |
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spin_unlock_bh(&priv->beacon_lock); |
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ath_dbg(common, CONFIG, "Removed interface at beacon slot: %d\n", |
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avp->bslot); |
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} |
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/* |
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* Calculate the TSF adjustment value for all slots |
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* other than zero. |
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*/ |
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void ath9k_htc_set_tsfadjust(struct ath9k_htc_priv *priv, |
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struct ieee80211_vif *vif) |
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{ |
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struct ath_common *common = ath9k_hw_common(priv->ah); |
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struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv; |
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struct ath_beacon_config *cur_conf = &priv->cur_beacon_conf; |
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u64 tsfadjust; |
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if (avp->bslot == 0) |
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return; |
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/* |
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* The beacon interval cannot be different for multi-AP mode, |
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* and we reach here only for VIF slots greater than zero, |
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* so beacon_interval is guaranteed to be set in cur_conf. |
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*/ |
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tsfadjust = cur_conf->beacon_interval * avp->bslot / ATH9K_HTC_MAX_BCN_VIF; |
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avp->tsfadjust = cpu_to_le64(TU_TO_USEC(tsfadjust)); |
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ath_dbg(common, CONFIG, "tsfadjust is: %llu for bslot: %d\n", |
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(unsigned long long)tsfadjust, avp->bslot); |
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} |
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static void ath9k_htc_beacon_iter(void *data, u8 *mac, struct ieee80211_vif *vif) |
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{ |
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bool *beacon_configured = data; |
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struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *) vif->drv_priv; |
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if (vif->type == NL80211_IFTYPE_STATION && |
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avp->beacon_configured) |
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*beacon_configured = true; |
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} |
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static bool ath9k_htc_check_beacon_config(struct ath9k_htc_priv *priv, |
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struct ieee80211_vif *vif) |
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{ |
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struct ath_common *common = ath9k_hw_common(priv->ah); |
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struct ath_beacon_config *cur_conf = &priv->cur_beacon_conf; |
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struct ieee80211_bss_conf *bss_conf = &vif->bss_conf; |
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bool beacon_configured; |
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|
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/* |
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* Changing the beacon interval when multiple AP interfaces |
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* are configured will affect beacon transmission of all |
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* of them. |
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*/ |
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if ((priv->ah->opmode == NL80211_IFTYPE_AP) && |
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(priv->num_ap_vif > 1) && |
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(vif->type == NL80211_IFTYPE_AP) && |
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(cur_conf->beacon_interval != bss_conf->beacon_int)) { |
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ath_dbg(common, CONFIG, |
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"Changing beacon interval of multiple AP interfaces !\n"); |
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return false; |
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} |
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|
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/* |
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* If the HW is operating in AP mode, any new station interfaces that |
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* are added cannot change the beacon parameters. |
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*/ |
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if (priv->num_ap_vif && |
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(vif->type != NL80211_IFTYPE_AP)) { |
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ath_dbg(common, CONFIG, |
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"HW in AP mode, cannot set STA beacon parameters\n"); |
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return false; |
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} |
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/* |
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* The beacon parameters are configured only for the first |
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* station interface. |
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*/ |
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if ((priv->ah->opmode == NL80211_IFTYPE_STATION) && |
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(priv->num_sta_vif > 1) && |
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(vif->type == NL80211_IFTYPE_STATION)) { |
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beacon_configured = false; |
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ieee80211_iterate_active_interfaces_atomic( |
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priv->hw, IEEE80211_IFACE_ITER_RESUME_ALL, |
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ath9k_htc_beacon_iter, &beacon_configured); |
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|
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if (beacon_configured) { |
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ath_dbg(common, CONFIG, |
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"Beacon already configured for a station interface\n"); |
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return false; |
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} |
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} |
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|
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return true; |
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} |
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|
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void ath9k_htc_beacon_config(struct ath9k_htc_priv *priv, |
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struct ieee80211_vif *vif) |
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{ |
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struct ath_common *common = ath9k_hw_common(priv->ah); |
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struct ath_beacon_config *cur_conf = &priv->cur_beacon_conf; |
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struct ieee80211_bss_conf *bss_conf = &vif->bss_conf; |
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struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *) vif->drv_priv; |
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|
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if (!ath9k_htc_check_beacon_config(priv, vif)) |
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return; |
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|
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cur_conf->beacon_interval = bss_conf->beacon_int; |
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if (cur_conf->beacon_interval == 0) |
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cur_conf->beacon_interval = 100; |
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|
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cur_conf->dtim_period = bss_conf->dtim_period; |
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cur_conf->bmiss_timeout = |
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ATH_DEFAULT_BMISS_LIMIT * cur_conf->beacon_interval; |
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|
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switch (vif->type) { |
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case NL80211_IFTYPE_STATION: |
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ath9k_htc_beacon_config_sta(priv, cur_conf); |
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avp->beacon_configured = true; |
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break; |
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case NL80211_IFTYPE_ADHOC: |
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ath9k_htc_beacon_config_adhoc(priv, cur_conf); |
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break; |
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case NL80211_IFTYPE_MESH_POINT: |
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case NL80211_IFTYPE_AP: |
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ath9k_htc_beacon_config_ap(priv, cur_conf); |
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break; |
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default: |
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ath_dbg(common, CONFIG, "Unsupported beaconing mode\n"); |
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return; |
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} |
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} |
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|
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void ath9k_htc_beacon_reconfig(struct ath9k_htc_priv *priv) |
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{ |
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struct ath_common *common = ath9k_hw_common(priv->ah); |
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struct ath_beacon_config *cur_conf = &priv->cur_beacon_conf; |
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|
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switch (priv->ah->opmode) { |
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case NL80211_IFTYPE_STATION: |
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ath9k_htc_beacon_config_sta(priv, cur_conf); |
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break; |
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case NL80211_IFTYPE_ADHOC: |
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ath9k_htc_beacon_config_adhoc(priv, cur_conf); |
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break; |
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case NL80211_IFTYPE_MESH_POINT: |
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case NL80211_IFTYPE_AP: |
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ath9k_htc_beacon_config_ap(priv, cur_conf); |
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break; |
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default: |
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ath_dbg(common, CONFIG, "Unsupported beaconing mode\n"); |
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return; |
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} |
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} |
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|
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bool ath9k_htc_csa_is_finished(struct ath9k_htc_priv *priv) |
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{ |
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struct ieee80211_vif *vif; |
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|
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vif = priv->csa_vif; |
|
if (!vif || !vif->csa_active) |
|
return false; |
|
|
|
if (!ieee80211_beacon_cntdwn_is_complete(vif)) |
|
return false; |
|
|
|
ieee80211_csa_finish(vif); |
|
|
|
priv->csa_vif = NULL; |
|
return true; |
|
}
|
|
|