--- /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"
+
+/******/
+/* TX */
+/******/
+
+static const int subtype_txq_to_hwq[] = {
+ [IEEE80211_AC_BE] = ATH_TXQ_AC_BE,
+ [IEEE80211_AC_BK] = ATH_TXQ_AC_BK,
+ [IEEE80211_AC_VI] = ATH_TXQ_AC_VI,
+ [IEEE80211_AC_VO] = ATH_TXQ_AC_VO,
+};
+
+#define ATH9K_HTC_INIT_TXQ(subtype) do { \
+ qi.tqi_subtype = subtype_txq_to_hwq[subtype]; \
+ qi.tqi_aifs = ATH9K_TXQ_USEDEFAULT; \
+ qi.tqi_cwmin = ATH9K_TXQ_USEDEFAULT; \
+ qi.tqi_cwmax = ATH9K_TXQ_USEDEFAULT; \
+ qi.tqi_physCompBuf = 0; \
+ qi.tqi_qflags = TXQ_FLAG_TXEOLINT_ENABLE | \
+ TXQ_FLAG_TXDESCINT_ENABLE; \
+ } while (0)
+
+int get_hw_qnum(u16 queue, int *hwq_map)
+{
+ switch (queue) {
+ case 0:
+ return hwq_map[IEEE80211_AC_VO];
+ case 1:
+ return hwq_map[IEEE80211_AC_VI];
+ case 2:
+ return hwq_map[IEEE80211_AC_BE];
+ case 3:
+ return hwq_map[IEEE80211_AC_BK];
+ default:
+ return hwq_map[IEEE80211_AC_BE];
+ }
+}
+
+void ath9k_htc_check_stop_queues(struct ath9k_htc_priv *priv)
+{
+ spin_lock_bh(&priv->tx.tx_lock);
+ priv->tx.queued_cnt++;
+ if ((priv->tx.queued_cnt >= ATH9K_HTC_TX_THRESHOLD) &&
+ !(priv->tx.flags & ATH9K_HTC_OP_TX_QUEUES_STOP)) {
+ priv->tx.flags |= ATH9K_HTC_OP_TX_QUEUES_STOP;
+ ieee80211_stop_queues(priv->hw);
+ }
+ spin_unlock_bh(&priv->tx.tx_lock);
+}
+
+void ath9k_htc_check_wake_queues(struct ath9k_htc_priv *priv)
+{
+ spin_lock_bh(&priv->tx.tx_lock);
+ if ((priv->tx.queued_cnt < ATH9K_HTC_TX_THRESHOLD) &&
+ (priv->tx.flags & ATH9K_HTC_OP_TX_QUEUES_STOP)) {
+ priv->tx.flags &= ~ATH9K_HTC_OP_TX_QUEUES_STOP;
+ ieee80211_wake_queues(priv->hw);
+ }
+ spin_unlock_bh(&priv->tx.tx_lock);
+}
+
+int ath9k_htc_tx_get_slot(struct ath9k_htc_priv *priv)
+{
+ int slot;
+
+ spin_lock_bh(&priv->tx.tx_lock);
+ slot = find_first_zero_bit(priv->tx.tx_slot, MAX_TX_BUF_NUM);
+ if (slot >= MAX_TX_BUF_NUM) {
+ spin_unlock_bh(&priv->tx.tx_lock);
+ return -ENOBUFS;
+ }
+ __set_bit(slot, priv->tx.tx_slot);
+ spin_unlock_bh(&priv->tx.tx_lock);
+
+ return slot;
+}
+
+void ath9k_htc_tx_clear_slot(struct ath9k_htc_priv *priv, int slot)
+{
+ spin_lock_bh(&priv->tx.tx_lock);
+ __clear_bit(slot, priv->tx.tx_slot);
+ spin_unlock_bh(&priv->tx.tx_lock);
+}
+
+static inline enum htc_endpoint_id get_htc_epid(struct ath9k_htc_priv *priv,
+ u16 qnum)
+{
+ enum htc_endpoint_id epid;
+
+ switch (qnum) {
+ case 0:
+ TX_QSTAT_INC(IEEE80211_AC_VO);
+ epid = priv->data_vo_ep;
+ break;
+ case 1:
+ TX_QSTAT_INC(IEEE80211_AC_VI);
+ epid = priv->data_vi_ep;
+ break;
+ case 2:
+ TX_QSTAT_INC(IEEE80211_AC_BE);
+ epid = priv->data_be_ep;
+ break;
+ case 3:
+ default:
+ TX_QSTAT_INC(IEEE80211_AC_BK);
+ epid = priv->data_bk_ep;
+ break;
+ }
+
+ return epid;
+}
+
+static inline struct sk_buff_head*
+get_htc_epid_queue(struct ath9k_htc_priv *priv, u8 epid)
+{
+ struct ath_common *common = ath9k_hw_common(priv->ah);
+ struct sk_buff_head *epid_queue = NULL;
+
+ if (epid == priv->mgmt_ep)
+ epid_queue = &priv->tx.mgmt_ep_queue;
+ else if (epid == priv->cab_ep)
+ epid_queue = &priv->tx.cab_ep_queue;
+ else if (epid == priv->data_be_ep)
+ epid_queue = &priv->tx.data_be_queue;
+ else if (epid == priv->data_bk_ep)
+ epid_queue = &priv->tx.data_bk_queue;
+ else if (epid == priv->data_vi_ep)
+ epid_queue = &priv->tx.data_vi_queue;
+ else if (epid == priv->data_vo_ep)
+ epid_queue = &priv->tx.data_vo_queue;
+ else
+ ath_err(common, "Invalid EPID: %d\n", epid);
+
+ return epid_queue;
+}
+
+/*
+ * Removes the driver header and returns the TX slot number
+ */
+static inline int strip_drv_header(struct ath9k_htc_priv *priv,
+ struct sk_buff *skb)
+{
+ struct ath_common *common = ath9k_hw_common(priv->ah);
+ struct ath9k_htc_tx_ctl *tx_ctl;
+ int slot;
+
+ tx_ctl = HTC_SKB_CB(skb);
+
+ if (tx_ctl->epid == priv->mgmt_ep) {
+ struct tx_mgmt_hdr *tx_mhdr =
+ (struct tx_mgmt_hdr *)skb->data;
+ slot = tx_mhdr->cookie;
+ skb_pull(skb, sizeof(struct tx_mgmt_hdr));
+ } else if ((tx_ctl->epid == priv->data_bk_ep) ||
+ (tx_ctl->epid == priv->data_be_ep) ||
+ (tx_ctl->epid == priv->data_vi_ep) ||
+ (tx_ctl->epid == priv->data_vo_ep) ||
+ (tx_ctl->epid == priv->cab_ep)) {
+ struct tx_frame_hdr *tx_fhdr =
+ (struct tx_frame_hdr *)skb->data;
+ slot = tx_fhdr->cookie;
+ skb_pull(skb, sizeof(struct tx_frame_hdr));
+ } else {
+ ath_err(common, "Unsupported EPID: %d\n", tx_ctl->epid);
+ slot = -EINVAL;
+ }
+
+ return slot;
+}
+
+int ath_htc_txq_update(struct ath9k_htc_priv *priv, int qnum,
+ struct ath9k_tx_queue_info *qinfo)
+{
+ struct ath_hw *ah = priv->ah;
+ int error = 0;
+ struct ath9k_tx_queue_info qi;
+
+ ath9k_hw_get_txq_props(ah, qnum, &qi);
+
+ qi.tqi_aifs = qinfo->tqi_aifs;
+ qi.tqi_cwmin = qinfo->tqi_cwmin / 2; /* XXX */
+ qi.tqi_cwmax = qinfo->tqi_cwmax;
+ qi.tqi_burstTime = qinfo->tqi_burstTime;
+ qi.tqi_readyTime = qinfo->tqi_readyTime;
+
+ if (!ath9k_hw_set_txq_props(ah, qnum, &qi)) {
+ ath_err(ath9k_hw_common(ah),
+ "Unable to update hardware queue %u!\n", qnum);
+ error = -EIO;
+ } else {
+ ath9k_hw_resettxqueue(ah, qnum);
+ }
+
+ return error;
+}
+
+static void ath9k_htc_tx_mgmt(struct ath9k_htc_priv *priv,
+ struct ath9k_htc_vif *avp,
+ struct sk_buff *skb,
+ u8 sta_idx, u8 vif_idx, u8 slot)
+{
+ struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
+ struct ieee80211_mgmt *mgmt;
+ struct ieee80211_hdr *hdr;
+ struct tx_mgmt_hdr mgmt_hdr;
+ struct ath9k_htc_tx_ctl *tx_ctl;
+ u8 *tx_fhdr;
+
+ tx_ctl = HTC_SKB_CB(skb);
+ hdr = (struct ieee80211_hdr *) skb->data;
+
+ memset(tx_ctl, 0, sizeof(*tx_ctl));
+ memset(&mgmt_hdr, 0, sizeof(struct tx_mgmt_hdr));
+
+ /*
+ * Set the TSF adjust value for probe response
+ * frame also.
+ */
+ if (avp && unlikely(ieee80211_is_probe_resp(hdr->frame_control))) {
+ mgmt = (struct ieee80211_mgmt *)skb->data;
+ mgmt->u.probe_resp.timestamp = avp->tsfadjust;
+ }
+
+ tx_ctl->type = ATH9K_HTC_MGMT;
+
+ mgmt_hdr.node_idx = sta_idx;
+ mgmt_hdr.vif_idx = vif_idx;
+ mgmt_hdr.tidno = 0;
+ mgmt_hdr.flags = 0;
+ mgmt_hdr.cookie = slot;
+
+ mgmt_hdr.key_type = ath9k_cmn_get_hw_crypto_keytype(skb);
+ if (mgmt_hdr.key_type == ATH9K_KEY_TYPE_CLEAR)
+ mgmt_hdr.keyix = (u8) ATH9K_TXKEYIX_INVALID;
+ else
+ mgmt_hdr.keyix = tx_info->control.hw_key->hw_key_idx;
+
+ tx_fhdr = skb_push(skb, sizeof(mgmt_hdr));
+ memcpy(tx_fhdr, (u8 *) &mgmt_hdr, sizeof(mgmt_hdr));
+ tx_ctl->epid = priv->mgmt_ep;
+}
+
+static void ath9k_htc_tx_data(struct ath9k_htc_priv *priv,
+ struct ieee80211_vif *vif,
+ struct sk_buff *skb,
+ u8 sta_idx, u8 vif_idx, u8 slot,
+ bool is_cab)
+{
+ struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
+ struct ieee80211_hdr *hdr;
+ struct ath9k_htc_tx_ctl *tx_ctl;
+ struct tx_frame_hdr tx_hdr;
+ u32 flags = 0;
+ u8 *qc, *tx_fhdr;
+ u16 qnum;
+
+ tx_ctl = HTC_SKB_CB(skb);
+ hdr = (struct ieee80211_hdr *) skb->data;
+
+ memset(tx_ctl, 0, sizeof(*tx_ctl));
+ memset(&tx_hdr, 0, sizeof(struct tx_frame_hdr));
+
+ tx_hdr.node_idx = sta_idx;
+ tx_hdr.vif_idx = vif_idx;
+ tx_hdr.cookie = slot;
+
+ /*
+ * This is a bit redundant but it helps to get
+ * the per-packet index quickly when draining the
+ * TX queue in the HIF layer. Otherwise we would
+ * have to parse the packet contents ...
+ */
+ tx_ctl->sta_idx = sta_idx;
+
+ if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) {
+ tx_ctl->type = ATH9K_HTC_AMPDU;
+ tx_hdr.data_type = ATH9K_HTC_AMPDU;
+ } else {
+ tx_ctl->type = ATH9K_HTC_NORMAL;
+ tx_hdr.data_type = ATH9K_HTC_NORMAL;
+ }
+
+ if (ieee80211_is_data_qos(hdr->frame_control)) {
+ qc = ieee80211_get_qos_ctl(hdr);
+ tx_hdr.tidno = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
+ }
+
+ /* Check for RTS protection */
+ if (priv->hw->wiphy->rts_threshold != (u32) -1)
+ if (skb->len > priv->hw->wiphy->rts_threshold)
+ flags |= ATH9K_HTC_TX_RTSCTS;
+
+ /* CTS-to-self */
+ if (!(flags & ATH9K_HTC_TX_RTSCTS) &&
+ (vif && vif->bss_conf.use_cts_prot))
+ flags |= ATH9K_HTC_TX_CTSONLY;
+
+ tx_hdr.flags = cpu_to_be32(flags);
+ tx_hdr.key_type = ath9k_cmn_get_hw_crypto_keytype(skb);
+ if (tx_hdr.key_type == ATH9K_KEY_TYPE_CLEAR)
+ tx_hdr.keyix = (u8) ATH9K_TXKEYIX_INVALID;
+ else
+ tx_hdr.keyix = tx_info->control.hw_key->hw_key_idx;
+
+ tx_fhdr = skb_push(skb, sizeof(tx_hdr));
+ memcpy(tx_fhdr, (u8 *) &tx_hdr, sizeof(tx_hdr));
+
+ if (is_cab) {
+ CAB_STAT_INC;
+ tx_ctl->epid = priv->cab_ep;
+ return;
+ }
+
+ qnum = skb_get_queue_mapping(skb);
+ tx_ctl->epid = get_htc_epid(priv, qnum);
+}
+
+int ath9k_htc_tx_start(struct ath9k_htc_priv *priv,
+ struct ieee80211_sta *sta,
+ struct sk_buff *skb,
+ u8 slot, bool is_cab)
+{
+ struct ieee80211_hdr *hdr;
+ struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
+ struct ieee80211_vif *vif = tx_info->control.vif;
+ struct ath9k_htc_sta *ista;
+ struct ath9k_htc_vif *avp = NULL;
+ u8 sta_idx, vif_idx;
+
+ hdr = (struct ieee80211_hdr *) skb->data;
+
+ /*
+ * Find out on which interface this packet has to be
+ * sent out.
+ */
+ if (vif) {
+ avp = (struct ath9k_htc_vif *) vif->drv_priv;
+ vif_idx = avp->index;
+ } else {
+ if (!priv->ah->is_monitoring) {
+ ath_dbg(ath9k_hw_common(priv->ah), XMIT,
+ "VIF is null, but no monitor interface !\n");
+ return -EINVAL;
+ }
+
+ vif_idx = priv->mon_vif_idx;
+ }
+
+ /*
+ * Find out which station this packet is destined for.
+ */
+ if (sta) {
+ ista = (struct ath9k_htc_sta *) sta->drv_priv;
+ sta_idx = ista->index;
+ } else {
+ sta_idx = priv->vif_sta_pos[vif_idx];
+ }
+
+ if (ieee80211_is_data(hdr->frame_control))
+ ath9k_htc_tx_data(priv, vif, skb,
+ sta_idx, vif_idx, slot, is_cab);
+ else
+ ath9k_htc_tx_mgmt(priv, avp, skb,
+ sta_idx, vif_idx, slot);
+
+
+ return htc_send(priv->htc, skb);
+}
+
+static inline bool __ath9k_htc_check_tx_aggr(struct ath9k_htc_priv *priv,
+ struct ath9k_htc_sta *ista, u8 tid)
+{
+ bool ret = false;
+
+ spin_lock_bh(&priv->tx.tx_lock);
+ if ((tid < ATH9K_HTC_MAX_TID) && (ista->tid_state[tid] == AGGR_STOP))
+ ret = true;
+ spin_unlock_bh(&priv->tx.tx_lock);
+
+ return ret;
+}
+
+static void ath9k_htc_check_tx_aggr(struct ath9k_htc_priv *priv,
+ struct ieee80211_vif *vif,
+ struct sk_buff *skb)
+{
+ struct ieee80211_sta *sta;
+ struct ieee80211_hdr *hdr;
+ __le16 fc;
+
+ hdr = (struct ieee80211_hdr *) skb->data;
+ fc = hdr->frame_control;
+
+ rcu_read_lock();
+
+ sta = ieee80211_find_sta(vif, hdr->addr1);
+ if (!sta) {
+ rcu_read_unlock();
+ return;
+ }
+
+ if (sta && conf_is_ht(&priv->hw->conf) &&
+ !(skb->protocol == cpu_to_be16(ETH_P_PAE))) {
+ if (ieee80211_is_data_qos(fc)) {
+ u8 *qc, tid;
+ struct ath9k_htc_sta *ista;
+
+ qc = ieee80211_get_qos_ctl(hdr);
+ tid = qc[0] & 0xf;
+ ista = (struct ath9k_htc_sta *)sta->drv_priv;
+ if (__ath9k_htc_check_tx_aggr(priv, ista, tid)) {
+ ieee80211_start_tx_ba_session(sta, tid, 0);
+ spin_lock_bh(&priv->tx.tx_lock);
+ ista->tid_state[tid] = AGGR_PROGRESS;
+ spin_unlock_bh(&priv->tx.tx_lock);
+ }
+ }
+ }
+
+ rcu_read_unlock();
+}
+
+static void ath9k_htc_tx_process(struct ath9k_htc_priv *priv,
+ struct sk_buff *skb,
+ struct __wmi_event_txstatus *txs)
+{
+ struct ieee80211_vif *vif;
+ struct ath9k_htc_tx_ctl *tx_ctl;
+ struct ieee80211_tx_info *tx_info;
+ struct ieee80211_tx_rate *rate;
+ struct ieee80211_conf *cur_conf = &priv->hw->conf;
+ bool txok;
+ int slot;
+ int hdrlen, padsize;
+
+ slot = strip_drv_header(priv, skb);
+ if (slot < 0) {
+ dev_kfree_skb_any(skb);
+ return;
+ }
+
+ tx_ctl = HTC_SKB_CB(skb);
+ txok = tx_ctl->txok;
+ tx_info = IEEE80211_SKB_CB(skb);
+ vif = tx_info->control.vif;
+ rate = &tx_info->status.rates[0];
+
+ memset(&tx_info->status, 0, sizeof(tx_info->status));
+
+ /*
+ * URB submission failed for this frame, it never reached
+ * the target.
+ */
+ if (!txok || !vif || !txs)
+ goto send_mac80211;
+
+ if (txs->ts_flags & ATH9K_HTC_TXSTAT_ACK) {
+ tx_info->flags |= IEEE80211_TX_STAT_ACK;
+ if (tx_info->flags & IEEE80211_TX_CTL_AMPDU)
+ tx_info->flags |= IEEE80211_TX_STAT_AMPDU;
+ }
+
+ if (txs->ts_flags & ATH9K_HTC_TXSTAT_FILT)
+ tx_info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
+
+ if (txs->ts_flags & ATH9K_HTC_TXSTAT_RTC_CTS)
+ rate->flags |= IEEE80211_TX_RC_USE_RTS_CTS;
+
+ rate->count = 1;
+ rate->idx = MS(txs->ts_rate, ATH9K_HTC_TXSTAT_RATE);
+
+ if (txs->ts_flags & ATH9K_HTC_TXSTAT_MCS) {
+ rate->flags |= IEEE80211_TX_RC_MCS;
+
+ if (txs->ts_flags & ATH9K_HTC_TXSTAT_CW40)
+ rate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
+ if (txs->ts_flags & ATH9K_HTC_TXSTAT_SGI)
+ rate->flags |= IEEE80211_TX_RC_SHORT_GI;
+ } else {
+ if (cur_conf->chandef.chan->band == IEEE80211_BAND_5GHZ)
+ rate->idx += 4; /* No CCK rates */
+ }
+
+ ath9k_htc_check_tx_aggr(priv, vif, skb);
+
+send_mac80211:
+ spin_lock_bh(&priv->tx.tx_lock);
+ if (WARN_ON(--priv->tx.queued_cnt < 0))
+ priv->tx.queued_cnt = 0;
+ spin_unlock_bh(&priv->tx.tx_lock);
+
+ ath9k_htc_tx_clear_slot(priv, slot);
+
+ /* Remove padding before handing frame back to mac80211 */
+ hdrlen = ieee80211_get_hdrlen_from_skb(skb);
+
+ padsize = hdrlen & 3;
+ if (padsize && skb->len > hdrlen + padsize) {
+ memmove(skb->data + padsize, skb->data, hdrlen);
+ skb_pull(skb, padsize);
+ }
+
+ /* Send status to mac80211 */
+ ieee80211_tx_status(priv->hw, skb);
+}
+
+static inline void ath9k_htc_tx_drainq(struct ath9k_htc_priv *priv,
+ struct sk_buff_head *queue)
+{
+ struct sk_buff *skb;
+
+ while ((skb = skb_dequeue(queue)) != NULL) {
+ ath9k_htc_tx_process(priv, skb, NULL);
+ }
+}
+
+void ath9k_htc_tx_drain(struct ath9k_htc_priv *priv)
+{
+ struct ath9k_htc_tx_event *event, *tmp;
+
+ spin_lock_bh(&priv->tx.tx_lock);
+ priv->tx.flags |= ATH9K_HTC_OP_TX_DRAIN;
+ spin_unlock_bh(&priv->tx.tx_lock);
+
+ /*
+ * Ensure that all pending TX frames are flushed,
+ * and that the TX completion/failed tasklets is killed.
+ */
+ htc_stop(priv->htc);
+ tasklet_kill(&priv->wmi->wmi_event_tasklet);
+ tasklet_kill(&priv->tx_failed_tasklet);
+
+ ath9k_htc_tx_drainq(priv, &priv->tx.mgmt_ep_queue);
+ ath9k_htc_tx_drainq(priv, &priv->tx.cab_ep_queue);
+ ath9k_htc_tx_drainq(priv, &priv->tx.data_be_queue);
+ ath9k_htc_tx_drainq(priv, &priv->tx.data_bk_queue);
+ ath9k_htc_tx_drainq(priv, &priv->tx.data_vi_queue);
+ ath9k_htc_tx_drainq(priv, &priv->tx.data_vo_queue);
+ ath9k_htc_tx_drainq(priv, &priv->tx.tx_failed);
+
+ /*
+ * The TX cleanup timer has already been killed.
+ */
+ spin_lock_bh(&priv->wmi->event_lock);
+ list_for_each_entry_safe(event, tmp, &priv->wmi->pending_tx_events, list) {
+ list_del(&event->list);
+ kfree(event);
+ }
+ spin_unlock_bh(&priv->wmi->event_lock);
+
+ spin_lock_bh(&priv->tx.tx_lock);
+ priv->tx.flags &= ~ATH9K_HTC_OP_TX_DRAIN;
+ spin_unlock_bh(&priv->tx.tx_lock);
+}
+
+void ath9k_tx_failed_tasklet(unsigned long data)
+{
+ struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)data;
+
+ spin_lock_bh(&priv->tx.tx_lock);
+ if (priv->tx.flags & ATH9K_HTC_OP_TX_DRAIN) {
+ spin_unlock_bh(&priv->tx.tx_lock);
+ return;
+ }
+ spin_unlock_bh(&priv->tx.tx_lock);
+
+ ath9k_htc_tx_drainq(priv, &priv->tx.tx_failed);
+}
+
+static inline bool check_cookie(struct ath9k_htc_priv *priv,
+ struct sk_buff *skb,
+ u8 cookie, u8 epid)
+{
+ u8 fcookie = 0;
+
+ if (epid == priv->mgmt_ep) {
+ struct tx_mgmt_hdr *hdr;
+ hdr = (struct tx_mgmt_hdr *) skb->data;
+ fcookie = hdr->cookie;
+ } else if ((epid == priv->data_bk_ep) ||
+ (epid == priv->data_be_ep) ||
+ (epid == priv->data_vi_ep) ||
+ (epid == priv->data_vo_ep) ||
+ (epid == priv->cab_ep)) {
+ struct tx_frame_hdr *hdr;
+ hdr = (struct tx_frame_hdr *) skb->data;
+ fcookie = hdr->cookie;
+ }
+
+ if (fcookie == cookie)
+ return true;
+
+ return false;
+}
+
+static struct sk_buff* ath9k_htc_tx_get_packet(struct ath9k_htc_priv *priv,
+ struct __wmi_event_txstatus *txs)
+{
+ struct ath_common *common = ath9k_hw_common(priv->ah);
+ struct sk_buff_head *epid_queue;
+ struct sk_buff *skb, *tmp;
+ unsigned long flags;
+ u8 epid = MS(txs->ts_rate, ATH9K_HTC_TXSTAT_EPID);
+
+ epid_queue = get_htc_epid_queue(priv, epid);
+ if (!epid_queue)
+ return NULL;
+
+ spin_lock_irqsave(&epid_queue->lock, flags);
+ skb_queue_walk_safe(epid_queue, skb, tmp) {
+ if (check_cookie(priv, skb, txs->cookie, epid)) {
+ __skb_unlink(skb, epid_queue);
+ spin_unlock_irqrestore(&epid_queue->lock, flags);
+ return skb;
+ }
+ }
+ spin_unlock_irqrestore(&epid_queue->lock, flags);
+
+ ath_dbg(common, XMIT, "No matching packet for cookie: %d, epid: %d\n",
+ txs->cookie, epid);
+
+ return NULL;
+}
+
+void ath9k_htc_txstatus(struct ath9k_htc_priv *priv, void *wmi_event)
+{
+ struct wmi_event_txstatus *txs = (struct wmi_event_txstatus *)wmi_event;
+ struct __wmi_event_txstatus *__txs;
+ struct sk_buff *skb;
+ struct ath9k_htc_tx_event *tx_pend;
+ int i;
+
+ for (i = 0; i < txs->cnt; i++) {
+ WARN_ON(txs->cnt > HTC_MAX_TX_STATUS);
+
+ __txs = &txs->txstatus[i];
+
+ skb = ath9k_htc_tx_get_packet(priv, __txs);
+ if (!skb) {
+ /*
+ * Store this event, so that the TX cleanup
+ * routine can check later for the needed packet.
+ */
+ tx_pend = kzalloc(sizeof(struct ath9k_htc_tx_event),
+ GFP_ATOMIC);
+ if (!tx_pend)
+ continue;
+
+ memcpy(&tx_pend->txs, __txs,
+ sizeof(struct __wmi_event_txstatus));
+
+ spin_lock(&priv->wmi->event_lock);
+ list_add_tail(&tx_pend->list,
+ &priv->wmi->pending_tx_events);
+ spin_unlock(&priv->wmi->event_lock);
+
+ continue;
+ }
+
+ ath9k_htc_tx_process(priv, skb, __txs);
+ }
+
+ /* Wake TX queues if needed */
+ ath9k_htc_check_wake_queues(priv);
+}
+
+void ath9k_htc_txep(void *drv_priv, struct sk_buff *skb,
+ enum htc_endpoint_id ep_id, bool txok)
+{
+ struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *) drv_priv;
+ struct ath9k_htc_tx_ctl *tx_ctl;
+ struct sk_buff_head *epid_queue;
+
+ tx_ctl = HTC_SKB_CB(skb);
+ tx_ctl->txok = txok;
+ tx_ctl->timestamp = jiffies;
+
+ if (!txok) {
+ skb_queue_tail(&priv->tx.tx_failed, skb);
+ tasklet_schedule(&priv->tx_failed_tasklet);
+ return;
+ }
+
+ epid_queue = get_htc_epid_queue(priv, ep_id);
+ if (!epid_queue) {
+ dev_kfree_skb_any(skb);
+ return;
+ }
+
+ skb_queue_tail(epid_queue, skb);
+}
+
+static inline bool check_packet(struct ath9k_htc_priv *priv, struct sk_buff *skb)
+{
+ struct ath_common *common = ath9k_hw_common(priv->ah);
+ struct ath9k_htc_tx_ctl *tx_ctl;
+
+ tx_ctl = HTC_SKB_CB(skb);
+
+ if (time_after(jiffies,
+ tx_ctl->timestamp +
+ msecs_to_jiffies(ATH9K_HTC_TX_TIMEOUT_INTERVAL))) {
+ ath_dbg(common, XMIT, "Dropping a packet due to TX timeout\n");
+ return true;
+ }
+
+ return false;
+}
+
+static void ath9k_htc_tx_cleanup_queue(struct ath9k_htc_priv *priv,
+ struct sk_buff_head *epid_queue)
+{
+ bool process = false;
+ unsigned long flags;
+ struct sk_buff *skb, *tmp;
+ struct sk_buff_head queue;
+
+ skb_queue_head_init(&queue);
+
+ spin_lock_irqsave(&epid_queue->lock, flags);
+ skb_queue_walk_safe(epid_queue, skb, tmp) {
+ if (check_packet(priv, skb)) {
+ __skb_unlink(skb, epid_queue);
+ __skb_queue_tail(&queue, skb);
+ process = true;
+ }
+ }
+ spin_unlock_irqrestore(&epid_queue->lock, flags);
+
+ if (process) {
+ skb_queue_walk_safe(&queue, skb, tmp) {
+ __skb_unlink(skb, &queue);
+ ath9k_htc_tx_process(priv, skb, NULL);
+ }
+ }
+}
+
+void ath9k_htc_tx_cleanup_timer(unsigned long data)
+{
+ struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *) data;
+ struct ath_common *common = ath9k_hw_common(priv->ah);
+ struct ath9k_htc_tx_event *event, *tmp;
+ struct sk_buff *skb;
+
+ spin_lock(&priv->wmi->event_lock);
+ list_for_each_entry_safe(event, tmp, &priv->wmi->pending_tx_events, list) {
+
+ skb = ath9k_htc_tx_get_packet(priv, &event->txs);
+ if (skb) {
+ ath_dbg(common, XMIT,
+ "Found packet for cookie: %d, epid: %d\n",
+ event->txs.cookie,
+ MS(event->txs.ts_rate, ATH9K_HTC_TXSTAT_EPID));
+
+ ath9k_htc_tx_process(priv, skb, &event->txs);
+ list_del(&event->list);
+ kfree(event);
+ continue;
+ }
+
+ if (++event->count >= ATH9K_HTC_TX_TIMEOUT_COUNT) {
+ list_del(&event->list);
+ kfree(event);
+ }
+ }
+ spin_unlock(&priv->wmi->event_lock);
+
+ /*
+ * Check if status-pending packets have to be cleaned up.
+ */
+ ath9k_htc_tx_cleanup_queue(priv, &priv->tx.mgmt_ep_queue);
+ ath9k_htc_tx_cleanup_queue(priv, &priv->tx.cab_ep_queue);
+ ath9k_htc_tx_cleanup_queue(priv, &priv->tx.data_be_queue);
+ ath9k_htc_tx_cleanup_queue(priv, &priv->tx.data_bk_queue);
+ ath9k_htc_tx_cleanup_queue(priv, &priv->tx.data_vi_queue);
+ ath9k_htc_tx_cleanup_queue(priv, &priv->tx.data_vo_queue);
+
+ /* Wake TX queues if needed */
+ ath9k_htc_check_wake_queues(priv);
+
+ mod_timer(&priv->tx.cleanup_timer,
+ jiffies + msecs_to_jiffies(ATH9K_HTC_TX_CLEANUP_INTERVAL));
+}
+
+int ath9k_tx_init(struct ath9k_htc_priv *priv)
+{
+ skb_queue_head_init(&priv->tx.mgmt_ep_queue);
+ skb_queue_head_init(&priv->tx.cab_ep_queue);
+ skb_queue_head_init(&priv->tx.data_be_queue);
+ skb_queue_head_init(&priv->tx.data_bk_queue);
+ skb_queue_head_init(&priv->tx.data_vi_queue);
+ skb_queue_head_init(&priv->tx.data_vo_queue);
+ skb_queue_head_init(&priv->tx.tx_failed);
+ return 0;
+}
+
+void ath9k_tx_cleanup(struct ath9k_htc_priv *priv)
+{
+
+}
+
+bool ath9k_htc_txq_setup(struct ath9k_htc_priv *priv, int subtype)
+{
+ struct ath_hw *ah = priv->ah;
+ struct ath_common *common = ath9k_hw_common(ah);
+ struct ath9k_tx_queue_info qi;
+ int qnum;
+
+ memset(&qi, 0, sizeof(qi));
+ ATH9K_HTC_INIT_TXQ(subtype);
+
+ qnum = ath9k_hw_setuptxqueue(priv->ah, ATH9K_TX_QUEUE_DATA, &qi);
+ if (qnum == -1)
+ return false;
+
+ if (qnum >= ARRAY_SIZE(priv->hwq_map)) {
+ ath_err(common, "qnum %u out of range, max %zu!\n",
+ qnum, ARRAY_SIZE(priv->hwq_map));
+ ath9k_hw_releasetxqueue(ah, qnum);
+ return false;
+ }
+
+ priv->hwq_map[subtype] = qnum;
+ return true;
+}
+
+int ath9k_htc_cabq_setup(struct ath9k_htc_priv *priv)
+{
+ struct ath9k_tx_queue_info qi;
+
+ memset(&qi, 0, sizeof(qi));
+ ATH9K_HTC_INIT_TXQ(0);
+
+ return ath9k_hw_setuptxqueue(priv->ah, ATH9K_TX_QUEUE_CAB, &qi);
+}
+
+/******/
+/* RX */
+/******/
+
+/*
+ * Calculate the RX filter to be set in the HW.
+ */
+u32 ath9k_htc_calcrxfilter(struct ath9k_htc_priv *priv)
+{
+#define RX_FILTER_PRESERVE (ATH9K_RX_FILTER_PHYERR | ATH9K_RX_FILTER_PHYRADAR)
+
+ struct ath_hw *ah = priv->ah;
+ u32 rfilt;
+
+ rfilt = (ath9k_hw_getrxfilter(ah) & RX_FILTER_PRESERVE)
+ | ATH9K_RX_FILTER_UCAST | ATH9K_RX_FILTER_BCAST
+ | ATH9K_RX_FILTER_MCAST;
+
+ if (priv->rxfilter & FIF_PROBE_REQ)
+ rfilt |= ATH9K_RX_FILTER_PROBEREQ;
+
+ /*
+ * Set promiscuous mode when FIF_PROMISC_IN_BSS is enabled for station
+ * mode interface or when in monitor mode. AP mode does not need this
+ * since it receives all in-BSS frames anyway.
+ */
+ if (((ah->opmode != NL80211_IFTYPE_AP) &&
+ (priv->rxfilter & FIF_PROMISC_IN_BSS)) ||
+ ah->is_monitoring)
+ rfilt |= ATH9K_RX_FILTER_PROM;
+
+ if (priv->rxfilter & FIF_CONTROL)
+ rfilt |= ATH9K_RX_FILTER_CONTROL;
+
+ if ((ah->opmode == NL80211_IFTYPE_STATION) &&
+ (priv->nvifs <= 1) &&
+ !(priv->rxfilter & FIF_BCN_PRBRESP_PROMISC))
+ rfilt |= ATH9K_RX_FILTER_MYBEACON;
+ else
+ rfilt |= ATH9K_RX_FILTER_BEACON;
+
+ if (conf_is_ht(&priv->hw->conf)) {
+ rfilt |= ATH9K_RX_FILTER_COMP_BAR;
+ rfilt |= ATH9K_RX_FILTER_UNCOMP_BA_BAR;
+ }
+
+ if (priv->rxfilter & FIF_PSPOLL)
+ rfilt |= ATH9K_RX_FILTER_PSPOLL;
+
+ if (priv->nvifs > 1 || priv->rxfilter & FIF_OTHER_BSS)
+ rfilt |= ATH9K_RX_FILTER_MCAST_BCAST_ALL;
+
+ return rfilt;
+
+#undef RX_FILTER_PRESERVE
+}
+
+/*
+ * Recv initialization for opmode change.
+ */
+static void ath9k_htc_opmode_init(struct ath9k_htc_priv *priv)
+{
+ struct ath_hw *ah = priv->ah;
+ u32 rfilt, mfilt[2];
+
+ /* configure rx filter */
+ rfilt = ath9k_htc_calcrxfilter(priv);
+ ath9k_hw_setrxfilter(ah, rfilt);
+
+ /* calculate and install multicast filter */
+ mfilt[0] = mfilt[1] = ~0;
+ ath9k_hw_setmcastfilter(ah, mfilt[0], mfilt[1]);
+}
+
+void ath9k_host_rx_init(struct ath9k_htc_priv *priv)
+{
+ struct ath_common *common = ath9k_hw_common(priv->ah);
+ ath9k_hw_rxena(priv->ah);
+ ath9k_htc_opmode_init(priv);
+ ath9k_hw_startpcureceive(priv->ah, test_bit(ATH_OP_SCANNING, &common->op_flags));
+}
+
+static inline void convert_htc_flag(struct ath_rx_status *rx_stats,
+ struct ath_htc_rx_status *rxstatus)
+{
+ rx_stats->flag = 0;
+ if (rxstatus->rs_flags & ATH9K_RX_2040)
+ rx_stats->flag |= RX_FLAG_40MHZ;
+ if (rxstatus->rs_flags & ATH9K_RX_GI)
+ rx_stats->flag |= RX_FLAG_SHORT_GI;
+}
+
+static void rx_status_htc_to_ath(struct ath_rx_status *rx_stats,
+ struct ath_htc_rx_status *rxstatus)
+{
+ rx_stats->rs_datalen = be16_to_cpu(rxstatus->rs_datalen);
+ rx_stats->rs_status = rxstatus->rs_status;
+ rx_stats->rs_phyerr = rxstatus->rs_phyerr;
+ rx_stats->rs_rssi = rxstatus->rs_rssi;
+ rx_stats->rs_keyix = rxstatus->rs_keyix;
+ rx_stats->rs_rate = rxstatus->rs_rate;
+ rx_stats->rs_antenna = rxstatus->rs_antenna;
+ rx_stats->rs_more = rxstatus->rs_more;
+
+ memcpy(rx_stats->rs_rssi_ctl, rxstatus->rs_rssi_ctl,
+ sizeof(rx_stats->rs_rssi_ctl));
+ memcpy(rx_stats->rs_rssi_ext, rxstatus->rs_rssi_ext,
+ sizeof(rx_stats->rs_rssi_ext));
+
+ rx_stats->rs_isaggr = rxstatus->rs_isaggr;
+ rx_stats->rs_moreaggr = rxstatus->rs_moreaggr;
+ rx_stats->rs_num_delims = rxstatus->rs_num_delims;
+ convert_htc_flag(rx_stats, rxstatus);
+}
+
+static bool ath9k_rx_prepare(struct ath9k_htc_priv *priv,
+ struct ath9k_htc_rxbuf *rxbuf,
+ struct ieee80211_rx_status *rx_status)
+
+{
+ struct ieee80211_hdr *hdr;
+ struct ieee80211_hw *hw = priv->hw;
+ struct sk_buff *skb = rxbuf->skb;
+ struct ath_common *common = ath9k_hw_common(priv->ah);
+ struct ath_hw *ah = common->ah;
+ struct ath_htc_rx_status *rxstatus;
+ struct ath_rx_status rx_stats;
+ bool decrypt_error = false;
+
+ if (skb->len < HTC_RX_FRAME_HEADER_SIZE) {
+ ath_err(common, "Corrupted RX frame, dropping (len: %d)\n",
+ skb->len);
+ goto rx_next;
+ }
+
+ rxstatus = (struct ath_htc_rx_status *)skb->data;
+
+ if (be16_to_cpu(rxstatus->rs_datalen) -
+ (skb->len - HTC_RX_FRAME_HEADER_SIZE) != 0) {
+ ath_err(common,
+ "Corrupted RX data len, dropping (dlen: %d, skblen: %d)\n",
+ rxstatus->rs_datalen, skb->len);
+ goto rx_next;
+ }
+
+ /* Get the RX status information */
+
+ memset(rx_status, 0, sizeof(struct ieee80211_rx_status));
+
+ /* Copy everything from ath_htc_rx_status (HTC_RX_FRAME_HEADER).
+ * After this, we can drop this part of skb. */
+ rx_status_htc_to_ath(&rx_stats, rxstatus);
+ ath9k_htc_err_stat_rx(priv, &rx_stats);
+ rx_status->mactime = be64_to_cpu(rxstatus->rs_tstamp);
+ skb_pull(skb, HTC_RX_FRAME_HEADER_SIZE);
+
+ /*
+ * everything but the rate is checked here, the rate check is done
+ * separately to avoid doing two lookups for a rate for each frame.
+ */
+ hdr = (struct ieee80211_hdr *)skb->data;
+
+ /*
+ * Process PHY errors and return so that the packet
+ * can be dropped.
+ */
+ if (rx_stats.rs_status & ATH9K_RXERR_PHY) {
+ /* TODO: Not using DFS processing now. */
+ if (ath_cmn_process_fft(&priv->spec_priv, hdr,
+ &rx_stats, rx_status->mactime)) {
+ /* TODO: Code to collect spectral scan statistics */
+ }
+ goto rx_next;
+ }
+
+ if (!ath9k_cmn_rx_accept(common, hdr, rx_status, &rx_stats,
+ &decrypt_error, priv->rxfilter))
+ goto rx_next;
+
+ ath9k_cmn_rx_skb_postprocess(common, skb, &rx_stats,
+ rx_status, decrypt_error);
+
+ if (ath9k_cmn_process_rate(common, hw, &rx_stats, rx_status))
+ goto rx_next;
+
+ rx_stats.is_mybeacon = ath_is_mybeacon(common, hdr);
+ ath9k_cmn_process_rssi(common, hw, &rx_stats, rx_status);
+
+ rx_status->band = ah->curchan->chan->band;
+ rx_status->freq = ah->curchan->chan->center_freq;
+ rx_status->antenna = rx_stats.rs_antenna;
+ rx_status->flag |= RX_FLAG_MACTIME_END;
+
+ return true;
+rx_next:
+ return false;
+}
+
+/*
+ * FIXME: Handle FLUSH later on.
+ */
+void ath9k_rx_tasklet(unsigned long data)
+{
+ struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)data;
+ struct ath9k_htc_rxbuf *rxbuf = NULL, *tmp_buf = NULL;
+ struct ieee80211_rx_status rx_status;
+ struct sk_buff *skb;
+ unsigned long flags;
+ struct ieee80211_hdr *hdr;
+
+ do {
+ spin_lock_irqsave(&priv->rx.rxbuflock, flags);
+ list_for_each_entry(tmp_buf, &priv->rx.rxbuf, list) {
+ if (tmp_buf->in_process) {
+ rxbuf = tmp_buf;
+ break;
+ }
+ }
+
+ if (rxbuf == NULL) {
+ spin_unlock_irqrestore(&priv->rx.rxbuflock, flags);
+ break;
+ }
+
+ if (!rxbuf->skb)
+ goto requeue;
+
+ if (!ath9k_rx_prepare(priv, rxbuf, &rx_status)) {
+ dev_kfree_skb_any(rxbuf->skb);
+ goto requeue;
+ }
+
+ memcpy(IEEE80211_SKB_RXCB(rxbuf->skb), &rx_status,
+ sizeof(struct ieee80211_rx_status));
+ skb = rxbuf->skb;
+ hdr = (struct ieee80211_hdr *) skb->data;
+
+ if (ieee80211_is_beacon(hdr->frame_control) && priv->ps_enabled)
+ ieee80211_queue_work(priv->hw, &priv->ps_work);
+
+ spin_unlock_irqrestore(&priv->rx.rxbuflock, flags);
+
+ ieee80211_rx(priv->hw, skb);
+
+ spin_lock_irqsave(&priv->rx.rxbuflock, flags);
+requeue:
+ rxbuf->in_process = false;
+ rxbuf->skb = NULL;
+ list_move_tail(&rxbuf->list, &priv->rx.rxbuf);
+ rxbuf = NULL;
+ spin_unlock_irqrestore(&priv->rx.rxbuflock, flags);
+ } while (1);
+
+}
+
+void ath9k_htc_rxep(void *drv_priv, struct sk_buff *skb,
+ enum htc_endpoint_id ep_id)
+{
+ struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)drv_priv;
+ struct ath_hw *ah = priv->ah;
+ struct ath_common *common = ath9k_hw_common(ah);
+ struct ath9k_htc_rxbuf *rxbuf = NULL, *tmp_buf = NULL;
+
+ spin_lock(&priv->rx.rxbuflock);
+ list_for_each_entry(tmp_buf, &priv->rx.rxbuf, list) {
+ if (!tmp_buf->in_process) {
+ rxbuf = tmp_buf;
+ break;
+ }
+ }
+ spin_unlock(&priv->rx.rxbuflock);
+
+ if (rxbuf == NULL) {
+ ath_dbg(common, ANY, "No free RX buffer\n");
+ goto err;
+ }
+
+ spin_lock(&priv->rx.rxbuflock);
+ rxbuf->skb = skb;
+ rxbuf->in_process = true;
+ spin_unlock(&priv->rx.rxbuflock);
+
+ tasklet_schedule(&priv->rx_tasklet);
+ return;
+err:
+ dev_kfree_skb_any(skb);
+}
+
+/* FIXME: Locking for cleanup/init */
+
+void ath9k_rx_cleanup(struct ath9k_htc_priv *priv)
+{
+ struct ath9k_htc_rxbuf *rxbuf, *tbuf;
+
+ list_for_each_entry_safe(rxbuf, tbuf, &priv->rx.rxbuf, list) {
+ list_del(&rxbuf->list);
+ if (rxbuf->skb)
+ dev_kfree_skb_any(rxbuf->skb);
+ kfree(rxbuf);
+ }
+}
+
+int ath9k_rx_init(struct ath9k_htc_priv *priv)
+{
+ int i = 0;
+
+ INIT_LIST_HEAD(&priv->rx.rxbuf);
+ spin_lock_init(&priv->rx.rxbuflock);
+
+ for (i = 0; i < ATH9K_HTC_RXBUF; i++) {
+ struct ath9k_htc_rxbuf *rxbuf =
+ kzalloc(sizeof(struct ath9k_htc_rxbuf), GFP_KERNEL);
+ if (rxbuf == NULL)
+ goto err;
+
+ list_add_tail(&rxbuf->list, &priv->rx.rxbuf);
+ }
+
+ return 0;
+
+err:
+ ath9k_rx_cleanup(priv);
+ return -ENOMEM;
+}
Code Review / kvmfornfv.git / blobdiff