diff options
author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
commit | 57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch) | |
tree | 5e910f0e82173f4ef4f51111366a3f1299037a7b /drivers/net/wireless/ath/ath9k/htc_drv_beacon.c |
Initial import
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/htc_drv_beacon.c')
-rw-r--r-- | drivers/net/wireless/ath/ath9k/htc_drv_beacon.c | 505 |
1 files changed, 505 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_beacon.c b/drivers/net/wireless/ath/ath9k/htc_drv_beacon.c new file mode 100644 index 000000000..e8b6ec3c1 --- /dev/null +++ b/drivers/net/wireless/ath/ath9k/htc_drv_beacon.c @@ -0,0 +1,505 @@ +/* + * Copyright (c) 2010-2011 Atheros Communications Inc. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "htc.h" + +#define FUDGE 2 + +void ath9k_htc_beaconq_config(struct ath9k_htc_priv *priv) +{ + struct ath_hw *ah = priv->ah; + struct ath9k_tx_queue_info qi, qi_be; + + memset(&qi, 0, sizeof(struct ath9k_tx_queue_info)); + memset(&qi_be, 0, sizeof(struct ath9k_tx_queue_info)); + + ath9k_hw_get_txq_props(ah, priv->beacon.beaconq, &qi); + + if (priv->ah->opmode == NL80211_IFTYPE_AP || + priv->ah->opmode == NL80211_IFTYPE_MESH_POINT) { + qi.tqi_aifs = 1; + qi.tqi_cwmin = 0; + qi.tqi_cwmax = 0; + } else if (priv->ah->opmode == NL80211_IFTYPE_ADHOC) { + int qnum = priv->hwq_map[IEEE80211_AC_BE]; + + ath9k_hw_get_txq_props(ah, qnum, &qi_be); + + qi.tqi_aifs = qi_be.tqi_aifs; + + /* + * For WIFI Beacon Distribution + * Long slot time : 2x cwmin + * Short slot time : 4x cwmin + */ + if (ah->slottime == ATH9K_SLOT_TIME_20) + qi.tqi_cwmin = 2*qi_be.tqi_cwmin; + else + qi.tqi_cwmin = 4*qi_be.tqi_cwmin; + + qi.tqi_cwmax = qi_be.tqi_cwmax; + + } + + if (!ath9k_hw_set_txq_props(ah, priv->beacon.beaconq, &qi)) { + ath_err(ath9k_hw_common(ah), + "Unable to update beacon queue %u!\n", priv->beacon.beaconq); + } else { + ath9k_hw_resettxqueue(ah, priv->beacon.beaconq); + } +} + +/* + * Both nexttbtt and intval have to be in usecs. + */ +static void ath9k_htc_beacon_init(struct ath9k_htc_priv *priv, + struct ath_beacon_config *conf, + bool reset_tsf) +{ + struct ath_hw *ah = priv->ah; + int ret __attribute__ ((unused)); + __be32 htc_imask = 0; + u8 cmd_rsp; + + if (conf->intval >= TU_TO_USEC(DEFAULT_SWBA_RESPONSE)) + ah->config.sw_beacon_response_time = DEFAULT_SWBA_RESPONSE; + else + ah->config.sw_beacon_response_time = MIN_SWBA_RESPONSE; + + WMI_CMD(WMI_DISABLE_INTR_CMDID); + if (reset_tsf) + ath9k_hw_reset_tsf(ah); + ath9k_htc_beaconq_config(priv); + ath9k_hw_beaconinit(ah, conf->nexttbtt, conf->intval); + priv->beacon.bmisscnt = 0; + htc_imask = cpu_to_be32(ah->imask); + WMI_CMD_BUF(WMI_ENABLE_INTR_CMDID, &htc_imask); +} + +static void ath9k_htc_beacon_config_sta(struct ath9k_htc_priv *priv, + struct ath_beacon_config *bss_conf) +{ + struct ath9k_beacon_state bs; + enum ath9k_int imask = 0; + __be32 htc_imask = 0; + int ret __attribute__ ((unused)); + u8 cmd_rsp; + + if (ath9k_cmn_beacon_config_sta(priv->ah, bss_conf, &bs) == -EPERM) + return; + + WMI_CMD(WMI_DISABLE_INTR_CMDID); + ath9k_hw_set_sta_beacon_timers(priv->ah, &bs); + imask |= ATH9K_INT_BMISS; + htc_imask = cpu_to_be32(imask); + WMI_CMD_BUF(WMI_ENABLE_INTR_CMDID, &htc_imask); +} + +static void ath9k_htc_beacon_config_ap(struct ath9k_htc_priv *priv, + struct ath_beacon_config *conf) +{ + struct ath_hw *ah = priv->ah; + ah->imask = 0; + + ath9k_cmn_beacon_config_ap(ah, conf, ATH9K_HTC_MAX_BCN_VIF); + ath9k_htc_beacon_init(priv, conf, false); +} + +static void ath9k_htc_beacon_config_adhoc(struct ath9k_htc_priv *priv, + struct ath_beacon_config *conf) +{ + struct ath_hw *ah = priv->ah; + ah->imask = 0; + + ath9k_cmn_beacon_config_adhoc(ah, conf); + ath9k_htc_beacon_init(priv, conf, conf->ibss_creator); +} + +void ath9k_htc_beaconep(void *drv_priv, struct sk_buff *skb, + enum htc_endpoint_id ep_id, bool txok) +{ + dev_kfree_skb_any(skb); +} + +static void ath9k_htc_send_buffered(struct ath9k_htc_priv *priv, + int slot) +{ + struct ath_common *common = ath9k_hw_common(priv->ah); + struct ieee80211_vif *vif; + struct sk_buff *skb; + struct ieee80211_hdr *hdr; + int padpos, padsize, ret, tx_slot; + + spin_lock_bh(&priv->beacon_lock); + + vif = priv->beacon.bslot[slot]; + + skb = ieee80211_get_buffered_bc(priv->hw, vif); + + while(skb) { + hdr = (struct ieee80211_hdr *) skb->data; + + padpos = ieee80211_hdrlen(hdr->frame_control); + padsize = padpos & 3; + if (padsize && skb->len > padpos) { + if (skb_headroom(skb) < padsize) { + dev_kfree_skb_any(skb); + goto next; + } + skb_push(skb, padsize); + memmove(skb->data, skb->data + padsize, padpos); + } + + tx_slot = ath9k_htc_tx_get_slot(priv); + if (tx_slot < 0) { + ath_dbg(common, XMIT, "No free CAB slot\n"); + dev_kfree_skb_any(skb); + goto next; + } + + ret = ath9k_htc_tx_start(priv, NULL, skb, tx_slot, true); + if (ret != 0) { + ath9k_htc_tx_clear_slot(priv, tx_slot); + dev_kfree_skb_any(skb); + + ath_dbg(common, XMIT, "Failed to send CAB frame\n"); + } else { + spin_lock_bh(&priv->tx.tx_lock); + priv->tx.queued_cnt++; + spin_unlock_bh(&priv->tx.tx_lock); + } + next: + skb = ieee80211_get_buffered_bc(priv->hw, vif); + } + + spin_unlock_bh(&priv->beacon_lock); +} + +static void ath9k_htc_send_beacon(struct ath9k_htc_priv *priv, + int slot) +{ + struct ath_common *common = ath9k_hw_common(priv->ah); + struct ieee80211_vif *vif; + struct ath9k_htc_vif *avp; + struct tx_beacon_header beacon_hdr; + struct ath9k_htc_tx_ctl *tx_ctl; + struct ieee80211_tx_info *info; + struct ieee80211_mgmt *mgmt; + struct sk_buff *beacon; + u8 *tx_fhdr; + int ret; + + memset(&beacon_hdr, 0, sizeof(struct tx_beacon_header)); + + spin_lock_bh(&priv->beacon_lock); + + vif = priv->beacon.bslot[slot]; + avp = (struct ath9k_htc_vif *)vif->drv_priv; + + if (unlikely(test_bit(ATH_OP_SCANNING, &common->op_flags))) { + spin_unlock_bh(&priv->beacon_lock); + return; + } + + /* Get a new beacon */ + beacon = ieee80211_beacon_get(priv->hw, vif); + if (!beacon) { + spin_unlock_bh(&priv->beacon_lock); + return; + } + + /* + * Update the TSF adjust value here, the HW will + * add this value for every beacon. + */ + mgmt = (struct ieee80211_mgmt *)beacon->data; + mgmt->u.beacon.timestamp = avp->tsfadjust; + + info = IEEE80211_SKB_CB(beacon); + if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) { + struct ieee80211_hdr *hdr = + (struct ieee80211_hdr *) beacon->data; + avp->seq_no += 0x10; + hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); + hdr->seq_ctrl |= cpu_to_le16(avp->seq_no); + } + + tx_ctl = HTC_SKB_CB(beacon); + memset(tx_ctl, 0, sizeof(*tx_ctl)); + + tx_ctl->type = ATH9K_HTC_BEACON; + tx_ctl->epid = priv->beacon_ep; + + beacon_hdr.vif_index = avp->index; + tx_fhdr = skb_push(beacon, sizeof(beacon_hdr)); + memcpy(tx_fhdr, (u8 *) &beacon_hdr, sizeof(beacon_hdr)); + + ret = htc_send(priv->htc, beacon); + if (ret != 0) { + if (ret == -ENOMEM) { + ath_dbg(common, BSTUCK, + "Failed to send beacon, no free TX buffer\n"); + } + dev_kfree_skb_any(beacon); + } + + spin_unlock_bh(&priv->beacon_lock); +} + +static int ath9k_htc_choose_bslot(struct ath9k_htc_priv *priv, + struct wmi_event_swba *swba) +{ + struct ath_common *common = ath9k_hw_common(priv->ah); + u64 tsf; + u32 tsftu; + u16 intval; + int slot; + + intval = priv->cur_beacon_conf.beacon_interval; + + tsf = be64_to_cpu(swba->tsf); + tsftu = TSF_TO_TU(tsf >> 32, tsf); + slot = ((tsftu % intval) * ATH9K_HTC_MAX_BCN_VIF) / intval; + slot = ATH9K_HTC_MAX_BCN_VIF - slot - 1; + + ath_dbg(common, BEACON, + "Choose slot: %d, tsf: %llu, tsftu: %u, intval: %u\n", + slot, tsf, tsftu, intval); + + return slot; +} + +void ath9k_htc_swba(struct ath9k_htc_priv *priv, + struct wmi_event_swba *swba) +{ + struct ath_common *common = ath9k_hw_common(priv->ah); + int slot; + + if (swba->beacon_pending != 0) { + priv->beacon.bmisscnt++; + if (priv->beacon.bmisscnt > BSTUCK_THRESHOLD) { + ath_dbg(common, BSTUCK, "Beacon stuck, HW reset\n"); + ieee80211_queue_work(priv->hw, + &priv->fatal_work); + } + return; + } + + if (priv->beacon.bmisscnt) { + ath_dbg(common, BSTUCK, + "Resuming beacon xmit after %u misses\n", + priv->beacon.bmisscnt); + priv->beacon.bmisscnt = 0; + } + + slot = ath9k_htc_choose_bslot(priv, swba); + spin_lock_bh(&priv->beacon_lock); + if (priv->beacon.bslot[slot] == NULL) { + spin_unlock_bh(&priv->beacon_lock); + return; + } + spin_unlock_bh(&priv->beacon_lock); + + ath9k_htc_send_buffered(priv, slot); + ath9k_htc_send_beacon(priv, slot); +} + +void ath9k_htc_assign_bslot(struct ath9k_htc_priv *priv, + struct ieee80211_vif *vif) +{ + struct ath_common *common = ath9k_hw_common(priv->ah); + struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv; + int i = 0; + + spin_lock_bh(&priv->beacon_lock); + for (i = 0; i < ATH9K_HTC_MAX_BCN_VIF; i++) { + if (priv->beacon.bslot[i] == NULL) { + avp->bslot = i; + break; + } + } + + priv->beacon.bslot[avp->bslot] = vif; + spin_unlock_bh(&priv->beacon_lock); + + ath_dbg(common, CONFIG, "Added interface at beacon slot: %d\n", + avp->bslot); +} + +void ath9k_htc_remove_bslot(struct ath9k_htc_priv *priv, + struct ieee80211_vif *vif) +{ + struct ath_common *common = ath9k_hw_common(priv->ah); + struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv; + + spin_lock_bh(&priv->beacon_lock); + priv->beacon.bslot[avp->bslot] = NULL; + spin_unlock_bh(&priv->beacon_lock); + + ath_dbg(common, CONFIG, "Removed interface at beacon slot: %d\n", + avp->bslot); +} + +/* + * Calculate the TSF adjustment value for all slots + * other than zero. + */ +void ath9k_htc_set_tsfadjust(struct ath9k_htc_priv *priv, + struct ieee80211_vif *vif) +{ + struct ath_common *common = ath9k_hw_common(priv->ah); + struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *)vif->drv_priv; + struct ath_beacon_config *cur_conf = &priv->cur_beacon_conf; + u64 tsfadjust; + + if (avp->bslot == 0) + return; + + /* + * The beacon interval cannot be different for multi-AP mode, + * and we reach here only for VIF slots greater than zero, + * so beacon_interval is guaranteed to be set in cur_conf. + */ + tsfadjust = cur_conf->beacon_interval * avp->bslot / ATH9K_HTC_MAX_BCN_VIF; + avp->tsfadjust = cpu_to_le64(TU_TO_USEC(tsfadjust)); + + ath_dbg(common, CONFIG, "tsfadjust is: %llu for bslot: %d\n", + (unsigned long long)tsfadjust, avp->bslot); +} + +static void ath9k_htc_beacon_iter(void *data, u8 *mac, struct ieee80211_vif *vif) +{ + bool *beacon_configured = (bool *)data; + struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *) vif->drv_priv; + + if (vif->type == NL80211_IFTYPE_STATION && + avp->beacon_configured) + *beacon_configured = true; +} + +static bool ath9k_htc_check_beacon_config(struct ath9k_htc_priv *priv, + struct ieee80211_vif *vif) +{ + struct ath_common *common = ath9k_hw_common(priv->ah); + struct ath_beacon_config *cur_conf = &priv->cur_beacon_conf; + struct ieee80211_bss_conf *bss_conf = &vif->bss_conf; + bool beacon_configured; + + /* + * Changing the beacon interval when multiple AP interfaces + * are configured will affect beacon transmission of all + * of them. + */ + if ((priv->ah->opmode == NL80211_IFTYPE_AP) && + (priv->num_ap_vif > 1) && + (vif->type == NL80211_IFTYPE_AP) && + (cur_conf->beacon_interval != bss_conf->beacon_int)) { + ath_dbg(common, CONFIG, + "Changing beacon interval of multiple AP interfaces !\n"); + return false; + } + + /* + * If the HW is operating in AP mode, any new station interfaces that + * are added cannot change the beacon parameters. + */ + if (priv->num_ap_vif && + (vif->type != NL80211_IFTYPE_AP)) { + ath_dbg(common, CONFIG, + "HW in AP mode, cannot set STA beacon parameters\n"); + return false; + } + + /* + * The beacon parameters are configured only for the first + * station interface. + */ + if ((priv->ah->opmode == NL80211_IFTYPE_STATION) && + (priv->num_sta_vif > 1) && + (vif->type == NL80211_IFTYPE_STATION)) { + beacon_configured = false; + ieee80211_iterate_active_interfaces_atomic( + priv->hw, IEEE80211_IFACE_ITER_RESUME_ALL, + ath9k_htc_beacon_iter, &beacon_configured); + + if (beacon_configured) { + ath_dbg(common, CONFIG, + "Beacon already configured for a station interface\n"); + return false; + } + } + + return true; +} + +void ath9k_htc_beacon_config(struct ath9k_htc_priv *priv, + struct ieee80211_vif *vif) +{ + struct ath_common *common = ath9k_hw_common(priv->ah); + struct ath_beacon_config *cur_conf = &priv->cur_beacon_conf; + struct ieee80211_bss_conf *bss_conf = &vif->bss_conf; + struct ath9k_htc_vif *avp = (struct ath9k_htc_vif *) vif->drv_priv; + + if (!ath9k_htc_check_beacon_config(priv, vif)) + return; + + cur_conf->beacon_interval = bss_conf->beacon_int; + if (cur_conf->beacon_interval == 0) + cur_conf->beacon_interval = 100; + + cur_conf->dtim_period = bss_conf->dtim_period; + cur_conf->bmiss_timeout = + ATH_DEFAULT_BMISS_LIMIT * cur_conf->beacon_interval; + + switch (vif->type) { + case NL80211_IFTYPE_STATION: + ath9k_htc_beacon_config_sta(priv, cur_conf); + avp->beacon_configured = true; + break; + case NL80211_IFTYPE_ADHOC: + ath9k_htc_beacon_config_adhoc(priv, cur_conf); + break; + case NL80211_IFTYPE_MESH_POINT: + case NL80211_IFTYPE_AP: + ath9k_htc_beacon_config_ap(priv, cur_conf); + break; + default: + ath_dbg(common, CONFIG, "Unsupported beaconing mode\n"); + return; + } +} + +void ath9k_htc_beacon_reconfig(struct ath9k_htc_priv *priv) +{ + struct ath_common *common = ath9k_hw_common(priv->ah); + struct ath_beacon_config *cur_conf = &priv->cur_beacon_conf; + + switch (priv->ah->opmode) { + case NL80211_IFTYPE_STATION: + ath9k_htc_beacon_config_sta(priv, cur_conf); + break; + case NL80211_IFTYPE_ADHOC: + ath9k_htc_beacon_config_adhoc(priv, cur_conf); + break; + case NL80211_IFTYPE_MESH_POINT: + case NL80211_IFTYPE_AP: + ath9k_htc_beacon_config_ap(priv, cur_conf); + break; + default: + ath_dbg(common, CONFIG, "Unsupported beaconing mode\n"); + return; + } +} |