--- /dev/null
+/*
+ * 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;
+ }
+}
Code Review / kvmfornfv.git / blobdiff