689 lines
17 KiB
C
689 lines
17 KiB
C
/*
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* Copyright (c) 2010 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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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[ATH9K_WME_AC_VO];
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case 1:
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return hwq_map[ATH9K_WME_AC_VI];
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case 2:
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return hwq_map[ATH9K_WME_AC_BE];
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case 3:
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return hwq_map[ATH9K_WME_AC_BK];
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default:
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return hwq_map[ATH9K_WME_AC_BE];
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}
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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_print(ath9k_hw_common(ah), ATH_DBG_FATAL,
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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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int ath9k_htc_tx_start(struct ath9k_htc_priv *priv, struct sk_buff *skb)
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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 ath9k_htc_sta *ista;
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struct ath9k_htc_vif *avp;
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struct ath9k_htc_tx_ctl tx_ctl;
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enum htc_endpoint_id epid;
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u16 qnum, hw_qnum;
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__le16 fc;
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u8 *tx_fhdr;
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u8 sta_idx;
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hdr = (struct ieee80211_hdr *) skb->data;
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fc = hdr->frame_control;
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avp = (struct ath9k_htc_vif *) tx_info->control.vif->drv_priv;
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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 = 0;
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}
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memset(&tx_ctl, 0, sizeof(struct ath9k_htc_tx_ctl));
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if (ieee80211_is_data(fc)) {
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struct tx_frame_hdr tx_hdr;
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u8 *qc;
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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 = avp->index;
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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(fc)) {
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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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tx_hdr.flags |= ATH9K_HTC_TX_RTSCTS;
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/* CTS-to-self */
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if (!(tx_hdr.flags & ATH9K_HTC_TX_RTSCTS) &&
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(priv->op_flags & OP_PROTECT_ENABLE))
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tx_hdr.flags |= ATH9K_HTC_TX_CTSONLY;
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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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qnum = skb_get_queue_mapping(skb);
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hw_qnum = get_hw_qnum(qnum, priv->hwq_map);
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switch (hw_qnum) {
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case 0:
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epid = priv->data_be_ep;
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break;
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case 2:
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epid = priv->data_vi_ep;
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break;
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case 3:
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epid = priv->data_vo_ep;
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break;
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case 1:
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default:
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epid = priv->data_bk_ep;
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break;
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}
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} else {
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struct tx_mgmt_hdr mgmt_hdr;
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memset(&mgmt_hdr, 0, sizeof(struct tx_mgmt_hdr));
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tx_ctl.type = ATH9K_HTC_NORMAL;
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mgmt_hdr.node_idx = sta_idx;
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mgmt_hdr.vif_idx = avp->index;
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mgmt_hdr.tidno = 0;
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mgmt_hdr.flags = 0;
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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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epid = priv->mgmt_ep;
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}
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return htc_send(priv->htc, skb, epid, &tx_ctl);
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}
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void ath9k_tx_tasklet(unsigned long data)
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{
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struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)data;
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struct ieee80211_sta *sta;
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struct ieee80211_hdr *hdr;
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struct ieee80211_tx_info *tx_info;
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struct sk_buff *skb = NULL;
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__le16 fc;
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while ((skb = skb_dequeue(&priv->tx_queue)) != NULL) {
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hdr = (struct ieee80211_hdr *) skb->data;
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fc = hdr->frame_control;
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tx_info = IEEE80211_SKB_CB(skb);
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memset(&tx_info->status, 0, sizeof(tx_info->status));
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rcu_read_lock();
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sta = ieee80211_find_sta(priv->vif, hdr->addr1);
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if (!sta) {
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rcu_read_unlock();
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ieee80211_tx_status(priv->hw, skb);
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continue;
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}
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/* Check if we need to start aggregation */
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if (sta && conf_is_ht(&priv->hw->conf) &&
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(priv->op_flags & OP_TXAGGR)
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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 ((tid < ATH9K_HTC_MAX_TID) &&
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ista->tid_state[tid] == AGGR_STOP) {
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ieee80211_start_tx_ba_session(sta, tid);
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ista->tid_state[tid] = AGGR_PROGRESS;
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}
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}
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}
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rcu_read_unlock();
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/* Send status to mac80211 */
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ieee80211_tx_status(priv->hw, skb);
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}
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}
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void ath9k_htc_txep(void *drv_priv, struct sk_buff *skb,
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enum htc_endpoint_id ep_id, bool txok)
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{
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struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *) drv_priv;
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struct ieee80211_tx_info *tx_info;
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if (!skb)
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return;
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if (ep_id == priv->mgmt_ep)
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skb_pull(skb, sizeof(struct tx_mgmt_hdr));
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else
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/* TODO: Check for cab/uapsd/data */
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skb_pull(skb, sizeof(struct tx_frame_hdr));
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tx_info = IEEE80211_SKB_CB(skb);
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if (txok)
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tx_info->flags |= IEEE80211_TX_STAT_ACK;
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skb_queue_tail(&priv->tx_queue, skb);
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tasklet_schedule(&priv->tx_tasklet);
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}
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int ath9k_tx_init(struct ath9k_htc_priv *priv)
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{
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skb_queue_head_init(&priv->tx_queue);
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return 0;
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}
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void ath9k_tx_cleanup(struct ath9k_htc_priv *priv)
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{
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}
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bool ath9k_htc_txq_setup(struct ath9k_htc_priv *priv,
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enum ath9k_tx_queue_subtype subtype)
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{
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struct ath_hw *ah = priv->ah;
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struct ath_common *common = ath9k_hw_common(ah);
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struct ath9k_tx_queue_info qi;
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int qnum;
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memset(&qi, 0, sizeof(qi));
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qi.tqi_subtype = 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 | TXQ_FLAG_TXDESCINT_ENABLE;
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qnum = ath9k_hw_setuptxqueue(priv->ah, ATH9K_TX_QUEUE_DATA, &qi);
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if (qnum == -1)
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return false;
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if (qnum >= ARRAY_SIZE(priv->hwq_map)) {
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ath_print(common, ATH_DBG_FATAL,
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"qnum %u out of range, max %u!\n",
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qnum, (unsigned int)ARRAY_SIZE(priv->hwq_map));
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ath9k_hw_releasetxqueue(ah, qnum);
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return false;
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}
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priv->hwq_map[subtype] = qnum;
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return true;
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}
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/******/
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/* RX */
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/******/
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/*
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* Calculate the RX filter to be set in the HW.
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*/
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u32 ath9k_htc_calcrxfilter(struct ath9k_htc_priv *priv)
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{
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#define RX_FILTER_PRESERVE (ATH9K_RX_FILTER_PHYERR | ATH9K_RX_FILTER_PHYRADAR)
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struct ath_hw *ah = priv->ah;
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u32 rfilt;
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rfilt = (ath9k_hw_getrxfilter(ah) & RX_FILTER_PRESERVE)
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| ATH9K_RX_FILTER_UCAST | ATH9K_RX_FILTER_BCAST
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| ATH9K_RX_FILTER_MCAST;
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/* If not a STA, enable processing of Probe Requests */
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if (ah->opmode != NL80211_IFTYPE_STATION)
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rfilt |= ATH9K_RX_FILTER_PROBEREQ;
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/*
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* Set promiscuous mode when FIF_PROMISC_IN_BSS is enabled for station
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* mode interface or when in monitor mode. AP mode does not need this
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* since it receives all in-BSS frames anyway.
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*/
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if (((ah->opmode != NL80211_IFTYPE_AP) &&
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(priv->rxfilter & FIF_PROMISC_IN_BSS)) ||
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(ah->opmode == NL80211_IFTYPE_MONITOR))
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rfilt |= ATH9K_RX_FILTER_PROM;
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if (priv->rxfilter & FIF_CONTROL)
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rfilt |= ATH9K_RX_FILTER_CONTROL;
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if ((ah->opmode == NL80211_IFTYPE_STATION) &&
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!(priv->rxfilter & FIF_BCN_PRBRESP_PROMISC))
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rfilt |= ATH9K_RX_FILTER_MYBEACON;
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else
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rfilt |= ATH9K_RX_FILTER_BEACON;
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if (conf_is_ht(&priv->hw->conf))
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rfilt |= ATH9K_RX_FILTER_COMP_BAR;
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return rfilt;
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#undef RX_FILTER_PRESERVE
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}
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/*
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* Recv initialization for opmode change.
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*/
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static void ath9k_htc_opmode_init(struct ath9k_htc_priv *priv)
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{
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struct ath_hw *ah = priv->ah;
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struct ath_common *common = ath9k_hw_common(ah);
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u32 rfilt, mfilt[2];
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/* configure rx filter */
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rfilt = ath9k_htc_calcrxfilter(priv);
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ath9k_hw_setrxfilter(ah, rfilt);
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/* configure bssid mask */
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if (ah->caps.hw_caps & ATH9K_HW_CAP_BSSIDMASK)
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ath_hw_setbssidmask(common);
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/* configure operational mode */
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ath9k_hw_setopmode(ah);
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/* Handle any link-level address change. */
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ath9k_hw_setmac(ah, common->macaddr);
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/* calculate and install multicast filter */
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mfilt[0] = mfilt[1] = ~0;
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ath9k_hw_setmcastfilter(ah, mfilt[0], mfilt[1]);
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}
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void ath9k_host_rx_init(struct ath9k_htc_priv *priv)
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{
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ath9k_hw_rxena(priv->ah);
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ath9k_htc_opmode_init(priv);
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ath9k_hw_startpcureceive(priv->ah);
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priv->rx.last_rssi = ATH_RSSI_DUMMY_MARKER;
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}
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static void ath9k_process_rate(struct ieee80211_hw *hw,
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struct ieee80211_rx_status *rxs,
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u8 rx_rate, u8 rs_flags)
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{
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struct ieee80211_supported_band *sband;
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enum ieee80211_band band;
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unsigned int i = 0;
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if (rx_rate & 0x80) {
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/* HT rate */
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rxs->flag |= RX_FLAG_HT;
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if (rs_flags & ATH9K_RX_2040)
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rxs->flag |= RX_FLAG_40MHZ;
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if (rs_flags & ATH9K_RX_GI)
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rxs->flag |= RX_FLAG_SHORT_GI;
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rxs->rate_idx = rx_rate & 0x7f;
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return;
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}
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band = hw->conf.channel->band;
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sband = hw->wiphy->bands[band];
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for (i = 0; i < sband->n_bitrates; i++) {
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if (sband->bitrates[i].hw_value == rx_rate) {
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rxs->rate_idx = i;
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return;
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}
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if (sband->bitrates[i].hw_value_short == rx_rate) {
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rxs->rate_idx = i;
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rxs->flag |= RX_FLAG_SHORTPRE;
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return;
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}
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}
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}
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static bool ath9k_rx_prepare(struct ath9k_htc_priv *priv,
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struct ath9k_htc_rxbuf *rxbuf,
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struct ieee80211_rx_status *rx_status)
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{
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struct ieee80211_hdr *hdr;
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struct ieee80211_hw *hw = priv->hw;
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struct sk_buff *skb = rxbuf->skb;
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struct ath_common *common = ath9k_hw_common(priv->ah);
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int hdrlen, padpos, padsize;
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int last_rssi = ATH_RSSI_DUMMY_MARKER;
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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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hdrlen = ieee80211_get_hdrlen_from_skb(skb);
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padpos = ath9k_cmn_padpos(fc);
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padsize = padpos & 3;
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if (padsize && skb->len >= padpos+padsize) {
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memmove(skb->data + padsize, skb->data, padpos);
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skb_pull(skb, padsize);
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}
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memset(rx_status, 0, sizeof(struct ieee80211_rx_status));
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if (rxbuf->rxstatus.rs_status != 0) {
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if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_CRC)
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rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
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if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_PHY)
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goto rx_next;
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if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_DECRYPT) {
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/* FIXME */
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} else if (rxbuf->rxstatus.rs_status & ATH9K_RXERR_MIC) {
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if (ieee80211_is_ctl(fc))
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/*
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* Sometimes, we get invalid
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* MIC failures on valid control frames.
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* Remove these mic errors.
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*/
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rxbuf->rxstatus.rs_status &= ~ATH9K_RXERR_MIC;
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else
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rx_status->flag |= RX_FLAG_MMIC_ERROR;
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}
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/*
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* Reject error frames with the exception of
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* decryption and MIC failures. For monitor mode,
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* we also ignore the CRC error.
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*/
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if (priv->ah->opmode == NL80211_IFTYPE_MONITOR) {
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if (rxbuf->rxstatus.rs_status &
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~(ATH9K_RXERR_DECRYPT | ATH9K_RXERR_MIC |
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ATH9K_RXERR_CRC))
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goto rx_next;
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} else {
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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 (priv->op_flags & OP_ASSOCIATED) {
|
|
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 = 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_TSFT;
|
|
|
|
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;
|
|
|
|
|
|
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;
|
|
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;
|
|
struct ath_htc_rx_status *rxstatus;
|
|
u32 len = 0;
|
|
|
|
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_print(common, ATH_DBG_ANY,
|
|
"No free RX buffer\n");
|
|
goto err;
|
|
}
|
|
|
|
len = skb->len;
|
|
if (len <= HTC_RX_FRAME_HEADER_SIZE) {
|
|
ath_print(common, ATH_DBG_FATAL,
|
|
"Corrupted RX frame, dropping\n");
|
|
goto err;
|
|
}
|
|
|
|
rxstatus = (struct ath_htc_rx_status *)skb->data;
|
|
|
|
rxstatus->rs_tstamp = be64_to_cpu(rxstatus->rs_tstamp);
|
|
rxstatus->rs_datalen = be16_to_cpu(rxstatus->rs_datalen);
|
|
rxstatus->evm0 = be32_to_cpu(rxstatus->evm0);
|
|
rxstatus->evm1 = be32_to_cpu(rxstatus->evm1);
|
|
rxstatus->evm2 = be32_to_cpu(rxstatus->evm2);
|
|
|
|
if (rxstatus->rs_datalen - (len - HTC_RX_FRAME_HEADER_SIZE) != 0) {
|
|
ath_print(common, ATH_DBG_FATAL,
|
|
"Corrupted RX data len, dropping "
|
|
"(epid: %d, dlen: %d, skblen: %d)\n",
|
|
ep_id, rxstatus->rs_datalen, len);
|
|
goto err;
|
|
}
|
|
|
|
spin_lock(&priv->rx.rxbuflock);
|
|
memcpy(&rxbuf->rxstatus, rxstatus, HTC_RX_FRAME_HEADER_SIZE);
|
|
skb_pull(skb, HTC_RX_FRAME_HEADER_SIZE);
|
|
skb->len = rxstatus->rs_datalen;
|
|
rxbuf->skb = skb;
|
|
rxbuf->in_process = true;
|
|
spin_unlock(&priv->rx.rxbuflock);
|
|
|
|
tasklet_schedule(&priv->rx_tasklet);
|
|
return;
|
|
err:
|
|
dev_kfree_skb_any(skb);
|
|
return;
|
|
}
|
|
|
|
/* 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_print(common, ATH_DBG_FATAL,
|
|
"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;
|
|
}
|