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OpenCloudOS-Kernel/drivers/net/wireless/ath/ath9k/htc_drv_txrx.c

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/*
* Copyright (c) 2010 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[] = {
[WME_AC_BE] = ATH_TXQ_AC_BE,
[WME_AC_BK] = ATH_TXQ_AC_BK,
[WME_AC_VI] = ATH_TXQ_AC_VI,
[WME_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[WME_AC_VO];
case 1:
return hwq_map[WME_AC_VI];
case 2:
return hwq_map[WME_AC_BE];
case 3:
return hwq_map[WME_AC_BK];
default:
return hwq_map[WME_AC_BE];
}
}
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_print(ath9k_hw_common(ah), ATH_DBG_FATAL,
"Unable to update hardware queue %u!\n", qnum);
error = -EIO;
} else {
ath9k_hw_resettxqueue(ah, qnum);
}
return error;
}
int ath9k_htc_tx_start(struct ath9k_htc_priv *priv, struct sk_buff *skb)
{
struct ieee80211_hdr *hdr;
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
struct ieee80211_sta *sta = tx_info->control.sta;
struct ath9k_htc_sta *ista;
struct ath9k_htc_tx_ctl tx_ctl;
enum htc_endpoint_id epid;
u16 qnum;
__le16 fc;
u8 *tx_fhdr;
u8 sta_idx, vif_idx;
hdr = (struct ieee80211_hdr *) skb->data;
fc = hdr->frame_control;
if (tx_info->control.vif &&
(struct ath9k_htc_vif *) tx_info->control.vif->drv_priv)
vif_idx = ((struct ath9k_htc_vif *)
tx_info->control.vif->drv_priv)->index;
else
vif_idx = priv->nvifs;
if (sta) {
ista = (struct ath9k_htc_sta *) sta->drv_priv;
sta_idx = ista->index;
} else {
sta_idx = 0;
}
memset(&tx_ctl, 0, sizeof(struct ath9k_htc_tx_ctl));
if (ieee80211_is_data(fc)) {
struct tx_frame_hdr tx_hdr;
u8 *qc;
memset(&tx_hdr, 0, sizeof(struct tx_frame_hdr));
tx_hdr.node_idx = sta_idx;
tx_hdr.vif_idx = vif_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(fc)) {
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)
tx_hdr.flags |= ATH9K_HTC_TX_RTSCTS;
/* CTS-to-self */
if (!(tx_hdr.flags & ATH9K_HTC_TX_RTSCTS) &&
(priv->op_flags & OP_PROTECT_ENABLE))
tx_hdr.flags |= ATH9K_HTC_TX_CTSONLY;
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));
qnum = skb_get_queue_mapping(skb);
switch (qnum) {
case 0:
TX_QSTAT_INC(WME_AC_VO);
epid = priv->data_vo_ep;
break;
case 1:
TX_QSTAT_INC(WME_AC_VI);
epid = priv->data_vi_ep;
break;
case 2:
TX_QSTAT_INC(WME_AC_BE);
epid = priv->data_be_ep;
break;
case 3:
default:
TX_QSTAT_INC(WME_AC_BK);
epid = priv->data_bk_ep;
break;
}
} else {
struct tx_mgmt_hdr mgmt_hdr;
memset(&mgmt_hdr, 0, sizeof(struct tx_mgmt_hdr));
tx_ctl.type = ATH9K_HTC_NORMAL;
mgmt_hdr.node_idx = sta_idx;
mgmt_hdr.vif_idx = vif_idx;
mgmt_hdr.tidno = 0;
mgmt_hdr.flags = 0;
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));
epid = priv->mgmt_ep;
}
return htc_send(priv->htc, skb, epid, &tx_ctl);
}
static 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_lock);
if ((tid < ATH9K_HTC_MAX_TID) && (ista->tid_state[tid] == AGGR_STOP))
ret = true;
spin_unlock_bh(&priv->tx_lock);
return ret;
}
void ath9k_tx_tasklet(unsigned long data)
{
struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)data;
struct ieee80211_sta *sta;
struct ieee80211_hdr *hdr;
struct ieee80211_tx_info *tx_info;
struct sk_buff *skb = NULL;
__le16 fc;
while ((skb = skb_dequeue(&priv->tx_queue)) != NULL) {
hdr = (struct ieee80211_hdr *) skb->data;
fc = hdr->frame_control;
tx_info = IEEE80211_SKB_CB(skb);
memset(&tx_info->status, 0, sizeof(tx_info->status));
rcu_read_lock();
sta = ieee80211_find_sta(priv->vif, hdr->addr1);
if (!sta) {
rcu_read_unlock();
ieee80211_tx_status(priv->hw, skb);
continue;
}
/* Check if we need to start aggregation */
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);
spin_lock_bh(&priv->tx_lock);
ista->tid_state[tid] = AGGR_PROGRESS;
spin_unlock_bh(&priv->tx_lock);
}
}
}
rcu_read_unlock();
/* Send status to mac80211 */
ieee80211_tx_status(priv->hw, skb);
}
/* Wake TX queues if needed */
spin_lock_bh(&priv->tx_lock);
if (priv->tx_queues_stop) {
priv->tx_queues_stop = false;
spin_unlock_bh(&priv->tx_lock);
ath_print(ath9k_hw_common(priv->ah), ATH_DBG_XMIT,
"Waking up TX queues\n");
ieee80211_wake_queues(priv->hw);
return;
}
spin_unlock_bh(&priv->tx_lock);
}
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 ath_common *common = ath9k_hw_common(priv->ah);
struct ieee80211_tx_info *tx_info;
if (!skb)
return;
if (ep_id == priv->mgmt_ep) {
skb_pull(skb, sizeof(struct tx_mgmt_hdr));
} else if ((ep_id == priv->data_bk_ep) ||
(ep_id == priv->data_be_ep) ||
(ep_id == priv->data_vi_ep) ||
(ep_id == priv->data_vo_ep)) {
skb_pull(skb, sizeof(struct tx_frame_hdr));
} else {
ath_print(common, ATH_DBG_FATAL,
"Unsupported TX EPID: %d\n", ep_id);
dev_kfree_skb_any(skb);
return;
}
tx_info = IEEE80211_SKB_CB(skb);
if (txok)
tx_info->flags |= IEEE80211_TX_STAT_ACK;
skb_queue_tail(&priv->tx_queue, skb);
tasklet_schedule(&priv->tx_tasklet);
}
int ath9k_tx_init(struct ath9k_htc_priv *priv)
{
skb_queue_head_init(&priv->tx_queue);
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_print(common, ATH_DBG_FATAL,
"qnum %u out of range, max %u!\n",
qnum, (unsigned int)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->opmode == NL80211_IFTYPE_MONITOR))
rfilt |= ATH9K_RX_FILTER_PROM;
if (priv->rxfilter & FIF_CONTROL)
rfilt |= ATH9K_RX_FILTER_CONTROL;
if ((ah->opmode == NL80211_IFTYPE_STATION) &&
!(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;
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;
struct ath_common *common = ath9k_hw_common(ah);
u32 rfilt, mfilt[2];
/* configure rx filter */
rfilt = ath9k_htc_calcrxfilter(priv);
ath9k_hw_setrxfilter(ah, rfilt);
/* configure bssid mask */
ath_hw_setbssidmask(common);
/* configure operational mode */
ath9k_hw_setopmode(ah);
/* 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_print(common, ATH_DBG_FATAL,
"Corrupted RX frame, dropping\n");
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_print(common, ATH_DBG_FATAL,
"Corrupted RX data len, dropping "
"(dlen: %d, skblen: %d)\n",
rxstatus->rs_datalen, skb->len);
goto rx_next;
}
/* 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 (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 = 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_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;
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_print(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_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;
}
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