| /* |
| * 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; |
| |
| if (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; |
| } |