forked from Minki/linux
5b68138e56
The Times They Are a-Changin'. Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
1225 lines
30 KiB
C
1225 lines
30 KiB
C
/*
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* Copyright (c) 2010-2011 Atheros Communications Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "htc.h"
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/******/
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/* TX */
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/******/
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static const int subtype_txq_to_hwq[] = {
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[WME_AC_BE] = ATH_TXQ_AC_BE,
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[WME_AC_BK] = ATH_TXQ_AC_BK,
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[WME_AC_VI] = ATH_TXQ_AC_VI,
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[WME_AC_VO] = ATH_TXQ_AC_VO,
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};
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#define ATH9K_HTC_INIT_TXQ(subtype) do { \
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qi.tqi_subtype = subtype_txq_to_hwq[subtype]; \
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qi.tqi_aifs = ATH9K_TXQ_USEDEFAULT; \
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qi.tqi_cwmin = ATH9K_TXQ_USEDEFAULT; \
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qi.tqi_cwmax = ATH9K_TXQ_USEDEFAULT; \
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qi.tqi_physCompBuf = 0; \
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qi.tqi_qflags = TXQ_FLAG_TXEOLINT_ENABLE | \
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TXQ_FLAG_TXDESCINT_ENABLE; \
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} while (0)
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int get_hw_qnum(u16 queue, int *hwq_map)
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{
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switch (queue) {
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case 0:
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return hwq_map[WME_AC_VO];
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case 1:
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return hwq_map[WME_AC_VI];
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case 2:
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return hwq_map[WME_AC_BE];
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case 3:
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return hwq_map[WME_AC_BK];
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default:
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return hwq_map[WME_AC_BE];
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}
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}
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void ath9k_htc_check_stop_queues(struct ath9k_htc_priv *priv)
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{
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spin_lock_bh(&priv->tx.tx_lock);
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priv->tx.queued_cnt++;
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if ((priv->tx.queued_cnt >= ATH9K_HTC_TX_THRESHOLD) &&
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!(priv->tx.flags & ATH9K_HTC_OP_TX_QUEUES_STOP)) {
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priv->tx.flags |= ATH9K_HTC_OP_TX_QUEUES_STOP;
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ieee80211_stop_queues(priv->hw);
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}
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spin_unlock_bh(&priv->tx.tx_lock);
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}
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void ath9k_htc_check_wake_queues(struct ath9k_htc_priv *priv)
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{
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spin_lock_bh(&priv->tx.tx_lock);
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if ((priv->tx.queued_cnt < ATH9K_HTC_TX_THRESHOLD) &&
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(priv->tx.flags & ATH9K_HTC_OP_TX_QUEUES_STOP)) {
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priv->tx.flags &= ~ATH9K_HTC_OP_TX_QUEUES_STOP;
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ieee80211_wake_queues(priv->hw);
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}
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spin_unlock_bh(&priv->tx.tx_lock);
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}
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int ath9k_htc_tx_get_slot(struct ath9k_htc_priv *priv)
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{
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int slot;
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spin_lock_bh(&priv->tx.tx_lock);
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slot = find_first_zero_bit(priv->tx.tx_slot, MAX_TX_BUF_NUM);
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if (slot >= MAX_TX_BUF_NUM) {
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spin_unlock_bh(&priv->tx.tx_lock);
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return -ENOBUFS;
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}
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__set_bit(slot, priv->tx.tx_slot);
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spin_unlock_bh(&priv->tx.tx_lock);
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return slot;
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}
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void ath9k_htc_tx_clear_slot(struct ath9k_htc_priv *priv, int slot)
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{
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spin_lock_bh(&priv->tx.tx_lock);
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__clear_bit(slot, priv->tx.tx_slot);
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spin_unlock_bh(&priv->tx.tx_lock);
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}
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static inline enum htc_endpoint_id get_htc_epid(struct ath9k_htc_priv *priv,
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u16 qnum)
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{
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enum htc_endpoint_id epid;
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switch (qnum) {
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case 0:
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TX_QSTAT_INC(WME_AC_VO);
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epid = priv->data_vo_ep;
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break;
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case 1:
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TX_QSTAT_INC(WME_AC_VI);
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epid = priv->data_vi_ep;
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break;
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case 2:
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TX_QSTAT_INC(WME_AC_BE);
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epid = priv->data_be_ep;
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break;
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case 3:
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default:
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TX_QSTAT_INC(WME_AC_BK);
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epid = priv->data_bk_ep;
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break;
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}
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return epid;
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}
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static inline struct sk_buff_head*
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get_htc_epid_queue(struct ath9k_htc_priv *priv, u8 epid)
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{
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struct ath_common *common = ath9k_hw_common(priv->ah);
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struct sk_buff_head *epid_queue = NULL;
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if (epid == priv->mgmt_ep)
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epid_queue = &priv->tx.mgmt_ep_queue;
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else if (epid == priv->cab_ep)
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epid_queue = &priv->tx.cab_ep_queue;
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else if (epid == priv->data_be_ep)
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epid_queue = &priv->tx.data_be_queue;
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else if (epid == priv->data_bk_ep)
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epid_queue = &priv->tx.data_bk_queue;
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else if (epid == priv->data_vi_ep)
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epid_queue = &priv->tx.data_vi_queue;
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else if (epid == priv->data_vo_ep)
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epid_queue = &priv->tx.data_vo_queue;
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else
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ath_err(common, "Invalid EPID: %d\n", epid);
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return epid_queue;
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}
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/*
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* Removes the driver header and returns the TX slot number
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*/
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static inline int strip_drv_header(struct ath9k_htc_priv *priv,
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struct sk_buff *skb)
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{
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struct ath_common *common = ath9k_hw_common(priv->ah);
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struct ath9k_htc_tx_ctl *tx_ctl;
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int slot;
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tx_ctl = HTC_SKB_CB(skb);
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if (tx_ctl->epid == priv->mgmt_ep) {
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struct tx_mgmt_hdr *tx_mhdr =
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(struct tx_mgmt_hdr *)skb->data;
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slot = tx_mhdr->cookie;
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skb_pull(skb, sizeof(struct tx_mgmt_hdr));
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} else if ((tx_ctl->epid == priv->data_bk_ep) ||
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(tx_ctl->epid == priv->data_be_ep) ||
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(tx_ctl->epid == priv->data_vi_ep) ||
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(tx_ctl->epid == priv->data_vo_ep) ||
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(tx_ctl->epid == priv->cab_ep)) {
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struct tx_frame_hdr *tx_fhdr =
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(struct tx_frame_hdr *)skb->data;
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slot = tx_fhdr->cookie;
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skb_pull(skb, sizeof(struct tx_frame_hdr));
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} else {
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ath_err(common, "Unsupported EPID: %d\n", tx_ctl->epid);
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slot = -EINVAL;
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}
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return slot;
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}
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int ath_htc_txq_update(struct ath9k_htc_priv *priv, int qnum,
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struct ath9k_tx_queue_info *qinfo)
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{
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struct ath_hw *ah = priv->ah;
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int error = 0;
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struct ath9k_tx_queue_info qi;
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ath9k_hw_get_txq_props(ah, qnum, &qi);
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qi.tqi_aifs = qinfo->tqi_aifs;
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qi.tqi_cwmin = qinfo->tqi_cwmin / 2; /* XXX */
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qi.tqi_cwmax = qinfo->tqi_cwmax;
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qi.tqi_burstTime = qinfo->tqi_burstTime;
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qi.tqi_readyTime = qinfo->tqi_readyTime;
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if (!ath9k_hw_set_txq_props(ah, qnum, &qi)) {
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ath_err(ath9k_hw_common(ah),
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"Unable to update hardware queue %u!\n", qnum);
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error = -EIO;
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} else {
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ath9k_hw_resettxqueue(ah, qnum);
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}
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return error;
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}
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static void ath9k_htc_tx_mgmt(struct ath9k_htc_priv *priv,
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struct ath9k_htc_vif *avp,
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struct sk_buff *skb,
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u8 sta_idx, u8 vif_idx, u8 slot)
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{
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struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
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struct ieee80211_mgmt *mgmt;
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struct ieee80211_hdr *hdr;
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struct tx_mgmt_hdr mgmt_hdr;
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struct ath9k_htc_tx_ctl *tx_ctl;
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u8 *tx_fhdr;
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tx_ctl = HTC_SKB_CB(skb);
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hdr = (struct ieee80211_hdr *) skb->data;
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memset(tx_ctl, 0, sizeof(*tx_ctl));
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memset(&mgmt_hdr, 0, sizeof(struct tx_mgmt_hdr));
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/*
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* Set the TSF adjust value for probe response
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* frame also.
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*/
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if (avp && unlikely(ieee80211_is_probe_resp(hdr->frame_control))) {
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mgmt = (struct ieee80211_mgmt *)skb->data;
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mgmt->u.probe_resp.timestamp = avp->tsfadjust;
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}
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tx_ctl->type = ATH9K_HTC_MGMT;
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mgmt_hdr.node_idx = sta_idx;
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mgmt_hdr.vif_idx = vif_idx;
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mgmt_hdr.tidno = 0;
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mgmt_hdr.flags = 0;
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mgmt_hdr.cookie = slot;
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mgmt_hdr.key_type = ath9k_cmn_get_hw_crypto_keytype(skb);
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if (mgmt_hdr.key_type == ATH9K_KEY_TYPE_CLEAR)
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mgmt_hdr.keyix = (u8) ATH9K_TXKEYIX_INVALID;
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else
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mgmt_hdr.keyix = tx_info->control.hw_key->hw_key_idx;
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tx_fhdr = skb_push(skb, sizeof(mgmt_hdr));
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memcpy(tx_fhdr, (u8 *) &mgmt_hdr, sizeof(mgmt_hdr));
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tx_ctl->epid = priv->mgmt_ep;
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}
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static void ath9k_htc_tx_data(struct ath9k_htc_priv *priv,
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struct ieee80211_vif *vif,
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struct sk_buff *skb,
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u8 sta_idx, u8 vif_idx, u8 slot,
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bool is_cab)
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{
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struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
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struct ieee80211_hdr *hdr;
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struct ath9k_htc_tx_ctl *tx_ctl;
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struct tx_frame_hdr tx_hdr;
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u32 flags = 0;
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u8 *qc, *tx_fhdr;
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u16 qnum;
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tx_ctl = HTC_SKB_CB(skb);
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hdr = (struct ieee80211_hdr *) skb->data;
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memset(tx_ctl, 0, sizeof(*tx_ctl));
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memset(&tx_hdr, 0, sizeof(struct tx_frame_hdr));
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tx_hdr.node_idx = sta_idx;
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tx_hdr.vif_idx = vif_idx;
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tx_hdr.cookie = slot;
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/*
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* This is a bit redundant but it helps to get
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* the per-packet index quickly when draining the
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* TX queue in the HIF layer. Otherwise we would
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* have to parse the packet contents ...
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*/
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tx_ctl->sta_idx = sta_idx;
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if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) {
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tx_ctl->type = ATH9K_HTC_AMPDU;
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tx_hdr.data_type = ATH9K_HTC_AMPDU;
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} else {
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tx_ctl->type = ATH9K_HTC_NORMAL;
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tx_hdr.data_type = ATH9K_HTC_NORMAL;
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}
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if (ieee80211_is_data_qos(hdr->frame_control)) {
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qc = ieee80211_get_qos_ctl(hdr);
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tx_hdr.tidno = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
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}
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/* Check for RTS protection */
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if (priv->hw->wiphy->rts_threshold != (u32) -1)
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if (skb->len > priv->hw->wiphy->rts_threshold)
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flags |= ATH9K_HTC_TX_RTSCTS;
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/* CTS-to-self */
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if (!(flags & ATH9K_HTC_TX_RTSCTS) &&
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(vif && vif->bss_conf.use_cts_prot))
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flags |= ATH9K_HTC_TX_CTSONLY;
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tx_hdr.flags = cpu_to_be32(flags);
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tx_hdr.key_type = ath9k_cmn_get_hw_crypto_keytype(skb);
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if (tx_hdr.key_type == ATH9K_KEY_TYPE_CLEAR)
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tx_hdr.keyix = (u8) ATH9K_TXKEYIX_INVALID;
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else
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tx_hdr.keyix = tx_info->control.hw_key->hw_key_idx;
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tx_fhdr = skb_push(skb, sizeof(tx_hdr));
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memcpy(tx_fhdr, (u8 *) &tx_hdr, sizeof(tx_hdr));
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if (is_cab) {
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CAB_STAT_INC;
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tx_ctl->epid = priv->cab_ep;
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return;
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}
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qnum = skb_get_queue_mapping(skb);
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tx_ctl->epid = get_htc_epid(priv, qnum);
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}
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int ath9k_htc_tx_start(struct ath9k_htc_priv *priv,
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struct sk_buff *skb,
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u8 slot, bool is_cab)
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{
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struct ieee80211_hdr *hdr;
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struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
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struct ieee80211_sta *sta = tx_info->control.sta;
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struct ieee80211_vif *vif = tx_info->control.vif;
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struct ath9k_htc_sta *ista;
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struct ath9k_htc_vif *avp = NULL;
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u8 sta_idx, vif_idx;
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hdr = (struct ieee80211_hdr *) skb->data;
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/*
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* Find out on which interface this packet has to be
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* sent out.
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*/
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if (vif) {
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avp = (struct ath9k_htc_vif *) vif->drv_priv;
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vif_idx = avp->index;
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} else {
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if (!priv->ah->is_monitoring) {
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ath_dbg(ath9k_hw_common(priv->ah), ATH_DBG_XMIT,
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"VIF is null, but no monitor interface !\n");
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return -EINVAL;
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}
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vif_idx = priv->mon_vif_idx;
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}
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/*
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* Find out which station this packet is destined for.
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*/
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if (sta) {
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ista = (struct ath9k_htc_sta *) sta->drv_priv;
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sta_idx = ista->index;
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} else {
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sta_idx = priv->vif_sta_pos[vif_idx];
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}
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if (ieee80211_is_data(hdr->frame_control))
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ath9k_htc_tx_data(priv, vif, skb,
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sta_idx, vif_idx, slot, is_cab);
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else
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ath9k_htc_tx_mgmt(priv, avp, skb,
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sta_idx, vif_idx, slot);
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return htc_send(priv->htc, skb);
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}
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static inline bool __ath9k_htc_check_tx_aggr(struct ath9k_htc_priv *priv,
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struct ath9k_htc_sta *ista, u8 tid)
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{
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bool ret = false;
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spin_lock_bh(&priv->tx.tx_lock);
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if ((tid < ATH9K_HTC_MAX_TID) && (ista->tid_state[tid] == AGGR_STOP))
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ret = true;
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spin_unlock_bh(&priv->tx.tx_lock);
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return ret;
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}
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static void ath9k_htc_check_tx_aggr(struct ath9k_htc_priv *priv,
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struct ieee80211_vif *vif,
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struct sk_buff *skb)
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{
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struct ieee80211_sta *sta;
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struct ieee80211_hdr *hdr;
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__le16 fc;
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hdr = (struct ieee80211_hdr *) skb->data;
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fc = hdr->frame_control;
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rcu_read_lock();
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sta = ieee80211_find_sta(vif, hdr->addr1);
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if (!sta) {
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rcu_read_unlock();
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return;
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}
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if (sta && conf_is_ht(&priv->hw->conf) &&
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!(skb->protocol == cpu_to_be16(ETH_P_PAE))) {
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if (ieee80211_is_data_qos(fc)) {
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u8 *qc, tid;
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struct ath9k_htc_sta *ista;
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qc = ieee80211_get_qos_ctl(hdr);
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tid = qc[0] & 0xf;
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ista = (struct ath9k_htc_sta *)sta->drv_priv;
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if (__ath9k_htc_check_tx_aggr(priv, ista, tid)) {
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ieee80211_start_tx_ba_session(sta, tid, 0);
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spin_lock_bh(&priv->tx.tx_lock);
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ista->tid_state[tid] = AGGR_PROGRESS;
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spin_unlock_bh(&priv->tx.tx_lock);
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}
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}
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}
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rcu_read_unlock();
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}
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static void ath9k_htc_tx_process(struct ath9k_htc_priv *priv,
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struct sk_buff *skb,
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struct __wmi_event_txstatus *txs)
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{
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struct ieee80211_vif *vif;
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struct ath9k_htc_tx_ctl *tx_ctl;
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struct ieee80211_tx_info *tx_info;
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struct ieee80211_tx_rate *rate;
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struct ieee80211_conf *cur_conf = &priv->hw->conf;
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bool txok;
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int slot;
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slot = strip_drv_header(priv, skb);
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if (slot < 0) {
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dev_kfree_skb_any(skb);
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return;
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}
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tx_ctl = HTC_SKB_CB(skb);
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txok = tx_ctl->txok;
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tx_info = IEEE80211_SKB_CB(skb);
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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 (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->channel->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);
|
|
|
|
/* 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, ATH_DBG_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, ATH_DBG_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, ATH_DBG_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)
|
|
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)
|
|
{
|
|
ath9k_hw_rxena(priv->ah);
|
|
ath9k_htc_opmode_init(priv);
|
|
ath9k_hw_startpcureceive(priv->ah, (priv->op_flags & OP_SCANNING));
|
|
priv->rx.last_rssi = ATH_RSSI_DUMMY_MARKER;
|
|
}
|
|
|
|
static void ath9k_process_rate(struct ieee80211_hw *hw,
|
|
struct ieee80211_rx_status *rxs,
|
|
u8 rx_rate, u8 rs_flags)
|
|
{
|
|
struct ieee80211_supported_band *sband;
|
|
enum ieee80211_band band;
|
|
unsigned int i = 0;
|
|
|
|
if (rx_rate & 0x80) {
|
|
/* HT rate */
|
|
rxs->flag |= RX_FLAG_HT;
|
|
if (rs_flags & ATH9K_RX_2040)
|
|
rxs->flag |= RX_FLAG_40MHZ;
|
|
if (rs_flags & ATH9K_RX_GI)
|
|
rxs->flag |= RX_FLAG_SHORT_GI;
|
|
rxs->rate_idx = rx_rate & 0x7f;
|
|
return;
|
|
}
|
|
|
|
band = hw->conf.channel->band;
|
|
sband = hw->wiphy->bands[band];
|
|
|
|
for (i = 0; i < sband->n_bitrates; i++) {
|
|
if (sband->bitrates[i].hw_value == rx_rate) {
|
|
rxs->rate_idx = i;
|
|
return;
|
|
}
|
|
if (sband->bitrates[i].hw_value_short == rx_rate) {
|
|
rxs->rate_idx = i;
|
|
rxs->flag |= RX_FLAG_SHORTPRE;
|
|
return;
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
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_htc_rx_status *rxstatus;
|
|
int hdrlen, padpos, padsize;
|
|
int last_rssi = ATH_RSSI_DUMMY_MARKER;
|
|
__le16 fc;
|
|
|
|
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;
|
|
}
|
|
|
|
ath9k_htc_err_stat_rx(priv, rxstatus);
|
|
|
|
/* Get the RX status information */
|
|
memcpy(&rxbuf->rxstatus, rxstatus, HTC_RX_FRAME_HEADER_SIZE);
|
|
skb_pull(skb, HTC_RX_FRAME_HEADER_SIZE);
|
|
|
|
hdr = (struct ieee80211_hdr *)skb->data;
|
|
fc = hdr->frame_control;
|
|
hdrlen = ieee80211_get_hdrlen_from_skb(skb);
|
|
|
|
padpos = ath9k_cmn_padpos(fc);
|
|
|
|
padsize = padpos & 3;
|
|
if (padsize && skb->len >= padpos+padsize+FCS_LEN) {
|
|
memmove(skb->data + padsize, skb->data, padpos);
|
|
skb_pull(skb, padsize);
|
|
}
|
|
|
|
memset(rx_status, 0, sizeof(struct ieee80211_rx_status));
|
|
|
|
if (rxbuf->rxstatus.rs_status != 0) {
|
|
if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_CRC)
|
|
rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
|
|
if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_PHY)
|
|
goto rx_next;
|
|
|
|
if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_DECRYPT) {
|
|
/* FIXME */
|
|
} else if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_MIC) {
|
|
if (ieee80211_is_ctl(fc))
|
|
/*
|
|
* Sometimes, we get invalid
|
|
* MIC failures on valid control frames.
|
|
* Remove these mic errors.
|
|
*/
|
|
rxbuf->rxstatus.rs_status &= ~ATH9K_RXERR_MIC;
|
|
else
|
|
rx_status->flag |= RX_FLAG_MMIC_ERROR;
|
|
}
|
|
|
|
/*
|
|
* Reject error frames with the exception of
|
|
* decryption and MIC failures. For monitor mode,
|
|
* we also ignore the CRC error.
|
|
*/
|
|
if (priv->ah->opmode == NL80211_IFTYPE_MONITOR) {
|
|
if (rxbuf->rxstatus.rs_status &
|
|
~(ATH9K_RXERR_DECRYPT | ATH9K_RXERR_MIC |
|
|
ATH9K_RXERR_CRC))
|
|
goto rx_next;
|
|
} else {
|
|
if (rxbuf->rxstatus.rs_status &
|
|
~(ATH9K_RXERR_DECRYPT | ATH9K_RXERR_MIC)) {
|
|
goto rx_next;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!(rxbuf->rxstatus.rs_status & ATH9K_RXERR_DECRYPT)) {
|
|
u8 keyix;
|
|
keyix = rxbuf->rxstatus.rs_keyix;
|
|
if (keyix != ATH9K_RXKEYIX_INVALID) {
|
|
rx_status->flag |= RX_FLAG_DECRYPTED;
|
|
} else if (ieee80211_has_protected(fc) &&
|
|
skb->len >= hdrlen + 4) {
|
|
keyix = skb->data[hdrlen + 3] >> 6;
|
|
if (test_bit(keyix, common->keymap))
|
|
rx_status->flag |= RX_FLAG_DECRYPTED;
|
|
}
|
|
}
|
|
|
|
ath9k_process_rate(hw, rx_status, rxbuf->rxstatus.rs_rate,
|
|
rxbuf->rxstatus.rs_flags);
|
|
|
|
if (rxbuf->rxstatus.rs_rssi != ATH9K_RSSI_BAD &&
|
|
!rxbuf->rxstatus.rs_moreaggr)
|
|
ATH_RSSI_LPF(priv->rx.last_rssi,
|
|
rxbuf->rxstatus.rs_rssi);
|
|
|
|
last_rssi = priv->rx.last_rssi;
|
|
|
|
if (likely(last_rssi != ATH_RSSI_DUMMY_MARKER))
|
|
rxbuf->rxstatus.rs_rssi = ATH_EP_RND(last_rssi,
|
|
ATH_RSSI_EP_MULTIPLIER);
|
|
|
|
if (rxbuf->rxstatus.rs_rssi < 0)
|
|
rxbuf->rxstatus.rs_rssi = 0;
|
|
|
|
if (ieee80211_is_beacon(fc))
|
|
priv->ah->stats.avgbrssi = rxbuf->rxstatus.rs_rssi;
|
|
|
|
rx_status->mactime = be64_to_cpu(rxbuf->rxstatus.rs_tstamp);
|
|
rx_status->band = hw->conf.channel->band;
|
|
rx_status->freq = hw->conf.channel->center_freq;
|
|
rx_status->signal = rxbuf->rxstatus.rs_rssi + ATH_DEFAULT_NOISE_FLOOR;
|
|
rx_status->antenna = rxbuf->rxstatus.rs_antenna;
|
|
rx_status->flag |= RX_FLAG_MACTIME_MPDU;
|
|
|
|
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, ATH_DBG_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)
|
|
{
|
|
struct ath_hw *ah = priv->ah;
|
|
struct ath_common *common = ath9k_hw_common(ah);
|
|
struct ath9k_htc_rxbuf *rxbuf;
|
|
int i = 0;
|
|
|
|
INIT_LIST_HEAD(&priv->rx.rxbuf);
|
|
spin_lock_init(&priv->rx.rxbuflock);
|
|
|
|
for (i = 0; i < ATH9K_HTC_RXBUF; i++) {
|
|
rxbuf = kzalloc(sizeof(struct ath9k_htc_rxbuf), GFP_KERNEL);
|
|
if (rxbuf == NULL) {
|
|
ath_err(common, "Unable to allocate RX buffers\n");
|
|
goto err;
|
|
}
|
|
list_add_tail(&rxbuf->list, &priv->rx.rxbuf);
|
|
}
|
|
|
|
return 0;
|
|
|
|
err:
|
|
ath9k_rx_cleanup(priv);
|
|
return -ENOMEM;
|
|
}
|