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kernel-ark/drivers/net/wireless/ath/ath9k/mac.c
Luis R. Rodriguez f4709fdf68 ath9k: Fix maximum tx fifo settings for single stream devices 
Atheros single stream AR9285 and AR9271 have half the PCU TX FIFO
buffer size of that of dual stream devices. Dual stream devices
have a max PCU TX FIFO size of 8 KB while single stream devices
have 4 KB. Single stream devices have an issue though and require
hardware only to use half of the amount of its capable PCU TX FIFO
size, 2 KB and this requires a change in software.

Technically a change would not have been required (except for frame
burst considerations of 128 bytes) if these devices would have been
able to use the full 4 KB of the PCU TX FIFO size but our systems
engineers recommend 2 KB to be used only. We enforce this through
software by reducing the max frame triggger level to 2 KB.

Fixing the max frame trigger level should then have a few benefits:

  * The PER will now be adjusted as designed for underruns when the
    max trigger level is reached. This should help alleviate the
    bus as the rate control algorithm chooses a slower rate which
    should ensure frames are transmitted properly under high system
    bus load.

  * The poll we use on our TX queues should now trigger and work
    as designed for single stream devices. The hardware passes
    data from each TX queue on the PCU TX FIFO queue respecting each
    queue's priority. The new trigger level ensures this seeding of
    the PCU TX FIFO queue occurs as designed which could mean avoiding
    false resets and actually reseting hw correctly when a TX queue
    is indeed stuck.

  * Some undocumented / unsupported behaviour could have been triggered
    when the max trigger level level was being set to 4 KB on single
    stream devices. Its not clear what this issue was to me yet.

Cc: Kyungwan Nam <kyungwan.nam@atheros.com>
Cc: Bennyam Malavazi <bennyam.malavazi@atheros.com>
Cc: Stephen Chen <stephen.chen@atheros.com>
Cc: Shan Palanisamy <shan.palanisamy@atheros.com>
Cc: Paul Shaw <paul.shaw@atheros.com>
Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-11-28 15:04:52 -05:00

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/*
* Copyright (c) 2008-2009 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 "hw.h"
static void ath9k_hw_set_txq_interrupts(struct ath_hw *ah,
struct ath9k_tx_queue_info *qi)
{
ath_print(ath9k_hw_common(ah), ATH_DBG_INTERRUPT,
"tx ok 0x%x err 0x%x desc 0x%x eol 0x%x urn 0x%x\n",
ah->txok_interrupt_mask, ah->txerr_interrupt_mask,
ah->txdesc_interrupt_mask, ah->txeol_interrupt_mask,
ah->txurn_interrupt_mask);
REG_WRITE(ah, AR_IMR_S0,
SM(ah->txok_interrupt_mask, AR_IMR_S0_QCU_TXOK)
| SM(ah->txdesc_interrupt_mask, AR_IMR_S0_QCU_TXDESC));
REG_WRITE(ah, AR_IMR_S1,
SM(ah->txerr_interrupt_mask, AR_IMR_S1_QCU_TXERR)
| SM(ah->txeol_interrupt_mask, AR_IMR_S1_QCU_TXEOL));
REG_RMW_FIELD(ah, AR_IMR_S2,
AR_IMR_S2_QCU_TXURN, ah->txurn_interrupt_mask);
}
u32 ath9k_hw_gettxbuf(struct ath_hw *ah, u32 q)
{
return REG_READ(ah, AR_QTXDP(q));
}
EXPORT_SYMBOL(ath9k_hw_gettxbuf);
void ath9k_hw_puttxbuf(struct ath_hw *ah, u32 q, u32 txdp)
{
REG_WRITE(ah, AR_QTXDP(q), txdp);
}
EXPORT_SYMBOL(ath9k_hw_puttxbuf);
void ath9k_hw_txstart(struct ath_hw *ah, u32 q)
{
ath_print(ath9k_hw_common(ah), ATH_DBG_QUEUE,
"Enable TXE on queue: %u\n", q);
REG_WRITE(ah, AR_Q_TXE, 1 << q);
}
EXPORT_SYMBOL(ath9k_hw_txstart);
u32 ath9k_hw_numtxpending(struct ath_hw *ah, u32 q)
{
u32 npend;
npend = REG_READ(ah, AR_QSTS(q)) & AR_Q_STS_PEND_FR_CNT;
if (npend == 0) {
if (REG_READ(ah, AR_Q_TXE) & (1 << q))
npend = 1;
}
return npend;
}
EXPORT_SYMBOL(ath9k_hw_numtxpending);
/**
* ath9k_hw_updatetxtriglevel - adjusts the frame trigger level
*
* @ah: atheros hardware struct
* @bIncTrigLevel: whether or not the frame trigger level should be updated
*
* The frame trigger level specifies the minimum number of bytes,
* in units of 64 bytes, that must be DMA'ed into the PCU TX FIFO
* before the PCU will initiate sending the frame on the air. This can
* mean we initiate transmit before a full frame is on the PCU TX FIFO.
* Resets to 0x1 (meaning 64 bytes or a full frame, whichever occurs
* first)
*
* Caution must be taken to ensure to set the frame trigger level based
* on the DMA request size. For example if the DMA request size is set to
* 128 bytes the trigger level cannot exceed 6 * 64 = 384. This is because
* there need to be enough space in the tx FIFO for the requested transfer
* size. Hence the tx FIFO will stop with 512 - 128 = 384 bytes. If we set
* the threshold to a value beyond 6, then the transmit will hang.
*
* Current dual stream devices have a PCU TX FIFO size of 8 KB.
* Current single stream devices have a PCU TX FIFO size of 4 KB, however,
* there is a hardware issue which forces us to use 2 KB instead so the
* frame trigger level must not exceed 2 KB for these chipsets.
*/
bool ath9k_hw_updatetxtriglevel(struct ath_hw *ah, bool bIncTrigLevel)
{
u32 txcfg, curLevel, newLevel;
enum ath9k_int omask;
if (ah->tx_trig_level >= ah->config.max_txtrig_level)
return false;
omask = ath9k_hw_set_interrupts(ah, ah->mask_reg & ~ATH9K_INT_GLOBAL);
txcfg = REG_READ(ah, AR_TXCFG);
curLevel = MS(txcfg, AR_FTRIG);
newLevel = curLevel;
if (bIncTrigLevel) {
if (curLevel < ah->config.max_txtrig_level)
newLevel++;
} else if (curLevel > MIN_TX_FIFO_THRESHOLD)
newLevel--;
if (newLevel != curLevel)
REG_WRITE(ah, AR_TXCFG,
(txcfg & ~AR_FTRIG) | SM(newLevel, AR_FTRIG));
ath9k_hw_set_interrupts(ah, omask);
ah->tx_trig_level = newLevel;
return newLevel != curLevel;
}
EXPORT_SYMBOL(ath9k_hw_updatetxtriglevel);
bool ath9k_hw_stoptxdma(struct ath_hw *ah, u32 q)
{
#define ATH9K_TX_STOP_DMA_TIMEOUT 4000 /* usec */
#define ATH9K_TIME_QUANTUM 100 /* usec */
struct ath_common *common = ath9k_hw_common(ah);
struct ath9k_hw_capabilities *pCap = &ah->caps;
struct ath9k_tx_queue_info *qi;
u32 tsfLow, j, wait;
u32 wait_time = ATH9K_TX_STOP_DMA_TIMEOUT / ATH9K_TIME_QUANTUM;
if (q >= pCap->total_queues) {
ath_print(common, ATH_DBG_QUEUE, "Stopping TX DMA, "
"invalid queue: %u\n", q);
return false;
}
qi = &ah->txq[q];
if (qi->tqi_type == ATH9K_TX_QUEUE_INACTIVE) {
ath_print(common, ATH_DBG_QUEUE, "Stopping TX DMA, "
"inactive queue: %u\n", q);
return false;
}
REG_WRITE(ah, AR_Q_TXD, 1 << q);
for (wait = wait_time; wait != 0; wait--) {
if (ath9k_hw_numtxpending(ah, q) == 0)
break;
udelay(ATH9K_TIME_QUANTUM);
}
if (ath9k_hw_numtxpending(ah, q)) {
ath_print(common, ATH_DBG_QUEUE,
"%s: Num of pending TX Frames %d on Q %d\n",
__func__, ath9k_hw_numtxpending(ah, q), q);
for (j = 0; j < 2; j++) {
tsfLow = REG_READ(ah, AR_TSF_L32);
REG_WRITE(ah, AR_QUIET2,
SM(10, AR_QUIET2_QUIET_DUR));
REG_WRITE(ah, AR_QUIET_PERIOD, 100);
REG_WRITE(ah, AR_NEXT_QUIET_TIMER, tsfLow >> 10);
REG_SET_BIT(ah, AR_TIMER_MODE,
AR_QUIET_TIMER_EN);
if ((REG_READ(ah, AR_TSF_L32) >> 10) == (tsfLow >> 10))
break;
ath_print(common, ATH_DBG_QUEUE,
"TSF has moved while trying to set "
"quiet time TSF: 0x%08x\n", tsfLow);
}
REG_SET_BIT(ah, AR_DIAG_SW, AR_DIAG_FORCE_CH_IDLE_HIGH);
udelay(200);
REG_CLR_BIT(ah, AR_TIMER_MODE, AR_QUIET_TIMER_EN);
wait = wait_time;
while (ath9k_hw_numtxpending(ah, q)) {
if ((--wait) == 0) {
ath_print(common, ATH_DBG_QUEUE,
"Failed to stop TX DMA in 100 "
"msec after killing last frame\n");
break;
}
udelay(ATH9K_TIME_QUANTUM);
}
REG_CLR_BIT(ah, AR_DIAG_SW, AR_DIAG_FORCE_CH_IDLE_HIGH);
}
REG_WRITE(ah, AR_Q_TXD, 0);
return wait != 0;
#undef ATH9K_TX_STOP_DMA_TIMEOUT
#undef ATH9K_TIME_QUANTUM
}
EXPORT_SYMBOL(ath9k_hw_stoptxdma);
void ath9k_hw_filltxdesc(struct ath_hw *ah, struct ath_desc *ds,
u32 segLen, bool firstSeg,
bool lastSeg, const struct ath_desc *ds0)
{
struct ar5416_desc *ads = AR5416DESC(ds);
if (firstSeg) {
ads->ds_ctl1 |= segLen | (lastSeg ? 0 : AR_TxMore);
} else if (lastSeg) {
ads->ds_ctl0 = 0;
ads->ds_ctl1 = segLen;
ads->ds_ctl2 = AR5416DESC_CONST(ds0)->ds_ctl2;
ads->ds_ctl3 = AR5416DESC_CONST(ds0)->ds_ctl3;
} else {
ads->ds_ctl0 = 0;
ads->ds_ctl1 = segLen | AR_TxMore;
ads->ds_ctl2 = 0;
ads->ds_ctl3 = 0;
}
ads->ds_txstatus0 = ads->ds_txstatus1 = 0;
ads->ds_txstatus2 = ads->ds_txstatus3 = 0;
ads->ds_txstatus4 = ads->ds_txstatus5 = 0;
ads->ds_txstatus6 = ads->ds_txstatus7 = 0;
ads->ds_txstatus8 = ads->ds_txstatus9 = 0;
}
EXPORT_SYMBOL(ath9k_hw_filltxdesc);
void ath9k_hw_cleartxdesc(struct ath_hw *ah, struct ath_desc *ds)
{
struct ar5416_desc *ads = AR5416DESC(ds);
ads->ds_txstatus0 = ads->ds_txstatus1 = 0;
ads->ds_txstatus2 = ads->ds_txstatus3 = 0;
ads->ds_txstatus4 = ads->ds_txstatus5 = 0;
ads->ds_txstatus6 = ads->ds_txstatus7 = 0;
ads->ds_txstatus8 = ads->ds_txstatus9 = 0;
}
EXPORT_SYMBOL(ath9k_hw_cleartxdesc);
int ath9k_hw_txprocdesc(struct ath_hw *ah, struct ath_desc *ds)
{
struct ar5416_desc *ads = AR5416DESC(ds);
if ((ads->ds_txstatus9 & AR_TxDone) == 0)
return -EINPROGRESS;
ds->ds_txstat.ts_seqnum = MS(ads->ds_txstatus9, AR_SeqNum);
ds->ds_txstat.ts_tstamp = ads->AR_SendTimestamp;
ds->ds_txstat.ts_status = 0;
ds->ds_txstat.ts_flags = 0;
if (ads->ds_txstatus1 & AR_FrmXmitOK)
ds->ds_txstat.ts_status |= ATH9K_TX_ACKED;
if (ads->ds_txstatus1 & AR_ExcessiveRetries)
ds->ds_txstat.ts_status |= ATH9K_TXERR_XRETRY;
if (ads->ds_txstatus1 & AR_Filtered)
ds->ds_txstat.ts_status |= ATH9K_TXERR_FILT;
if (ads->ds_txstatus1 & AR_FIFOUnderrun) {
ds->ds_txstat.ts_status |= ATH9K_TXERR_FIFO;
ath9k_hw_updatetxtriglevel(ah, true);
}
if (ads->ds_txstatus9 & AR_TxOpExceeded)
ds->ds_txstat.ts_status |= ATH9K_TXERR_XTXOP;
if (ads->ds_txstatus1 & AR_TxTimerExpired)
ds->ds_txstat.ts_status |= ATH9K_TXERR_TIMER_EXPIRED;
if (ads->ds_txstatus1 & AR_DescCfgErr)
ds->ds_txstat.ts_flags |= ATH9K_TX_DESC_CFG_ERR;
if (ads->ds_txstatus1 & AR_TxDataUnderrun) {
ds->ds_txstat.ts_flags |= ATH9K_TX_DATA_UNDERRUN;
ath9k_hw_updatetxtriglevel(ah, true);
}
if (ads->ds_txstatus1 & AR_TxDelimUnderrun) {
ds->ds_txstat.ts_flags |= ATH9K_TX_DELIM_UNDERRUN;
ath9k_hw_updatetxtriglevel(ah, true);
}
if (ads->ds_txstatus0 & AR_TxBaStatus) {
ds->ds_txstat.ts_flags |= ATH9K_TX_BA;
ds->ds_txstat.ba_low = ads->AR_BaBitmapLow;
ds->ds_txstat.ba_high = ads->AR_BaBitmapHigh;
}
ds->ds_txstat.ts_rateindex = MS(ads->ds_txstatus9, AR_FinalTxIdx);
switch (ds->ds_txstat.ts_rateindex) {
case 0:
ds->ds_txstat.ts_ratecode = MS(ads->ds_ctl3, AR_XmitRate0);
break;
case 1:
ds->ds_txstat.ts_ratecode = MS(ads->ds_ctl3, AR_XmitRate1);
break;
case 2:
ds->ds_txstat.ts_ratecode = MS(ads->ds_ctl3, AR_XmitRate2);
break;
case 3:
ds->ds_txstat.ts_ratecode = MS(ads->ds_ctl3, AR_XmitRate3);
break;
}
ds->ds_txstat.ts_rssi = MS(ads->ds_txstatus5, AR_TxRSSICombined);
ds->ds_txstat.ts_rssi_ctl0 = MS(ads->ds_txstatus0, AR_TxRSSIAnt00);
ds->ds_txstat.ts_rssi_ctl1 = MS(ads->ds_txstatus0, AR_TxRSSIAnt01);
ds->ds_txstat.ts_rssi_ctl2 = MS(ads->ds_txstatus0, AR_TxRSSIAnt02);
ds->ds_txstat.ts_rssi_ext0 = MS(ads->ds_txstatus5, AR_TxRSSIAnt10);
ds->ds_txstat.ts_rssi_ext1 = MS(ads->ds_txstatus5, AR_TxRSSIAnt11);
ds->ds_txstat.ts_rssi_ext2 = MS(ads->ds_txstatus5, AR_TxRSSIAnt12);
ds->ds_txstat.evm0 = ads->AR_TxEVM0;
ds->ds_txstat.evm1 = ads->AR_TxEVM1;
ds->ds_txstat.evm2 = ads->AR_TxEVM2;
ds->ds_txstat.ts_shortretry = MS(ads->ds_txstatus1, AR_RTSFailCnt);
ds->ds_txstat.ts_longretry = MS(ads->ds_txstatus1, AR_DataFailCnt);
ds->ds_txstat.ts_virtcol = MS(ads->ds_txstatus1, AR_VirtRetryCnt);
ds->ds_txstat.ts_antenna = 0;
return 0;
}
EXPORT_SYMBOL(ath9k_hw_txprocdesc);
void ath9k_hw_set11n_txdesc(struct ath_hw *ah, struct ath_desc *ds,
u32 pktLen, enum ath9k_pkt_type type, u32 txPower,
u32 keyIx, enum ath9k_key_type keyType, u32 flags)
{
struct ar5416_desc *ads = AR5416DESC(ds);
txPower += ah->txpower_indexoffset;
if (txPower > 63)
txPower = 63;
ads->ds_ctl0 = (pktLen & AR_FrameLen)
| (flags & ATH9K_TXDESC_VMF ? AR_VirtMoreFrag : 0)
| SM(txPower, AR_XmitPower)
| (flags & ATH9K_TXDESC_VEOL ? AR_VEOL : 0)
| (flags & ATH9K_TXDESC_CLRDMASK ? AR_ClrDestMask : 0)
| (flags & ATH9K_TXDESC_INTREQ ? AR_TxIntrReq : 0)
| (keyIx != ATH9K_TXKEYIX_INVALID ? AR_DestIdxValid : 0);
ads->ds_ctl1 =
(keyIx != ATH9K_TXKEYIX_INVALID ? SM(keyIx, AR_DestIdx) : 0)
| SM(type, AR_FrameType)
| (flags & ATH9K_TXDESC_NOACK ? AR_NoAck : 0)
| (flags & ATH9K_TXDESC_EXT_ONLY ? AR_ExtOnly : 0)
| (flags & ATH9K_TXDESC_EXT_AND_CTL ? AR_ExtAndCtl : 0);
ads->ds_ctl6 = SM(keyType, AR_EncrType);
if (AR_SREV_9285(ah)) {
ads->ds_ctl8 = 0;
ads->ds_ctl9 = 0;
ads->ds_ctl10 = 0;
ads->ds_ctl11 = 0;
}
}
EXPORT_SYMBOL(ath9k_hw_set11n_txdesc);
void ath9k_hw_set11n_ratescenario(struct ath_hw *ah, struct ath_desc *ds,
struct ath_desc *lastds,
u32 durUpdateEn, u32 rtsctsRate,
u32 rtsctsDuration,
struct ath9k_11n_rate_series series[],
u32 nseries, u32 flags)
{
struct ar5416_desc *ads = AR5416DESC(ds);
struct ar5416_desc *last_ads = AR5416DESC(lastds);
u32 ds_ctl0;
if (flags & (ATH9K_TXDESC_RTSENA | ATH9K_TXDESC_CTSENA)) {
ds_ctl0 = ads->ds_ctl0;
if (flags & ATH9K_TXDESC_RTSENA) {
ds_ctl0 &= ~AR_CTSEnable;
ds_ctl0 |= AR_RTSEnable;
} else {
ds_ctl0 &= ~AR_RTSEnable;
ds_ctl0 |= AR_CTSEnable;
}
ads->ds_ctl0 = ds_ctl0;
} else {
ads->ds_ctl0 =
(ads->ds_ctl0 & ~(AR_RTSEnable | AR_CTSEnable));
}
ads->ds_ctl2 = set11nTries(series, 0)
| set11nTries(series, 1)
| set11nTries(series, 2)
| set11nTries(series, 3)
| (durUpdateEn ? AR_DurUpdateEna : 0)
| SM(0, AR_BurstDur);
ads->ds_ctl3 = set11nRate(series, 0)
| set11nRate(series, 1)
| set11nRate(series, 2)
| set11nRate(series, 3);
ads->ds_ctl4 = set11nPktDurRTSCTS(series, 0)
| set11nPktDurRTSCTS(series, 1);
ads->ds_ctl5 = set11nPktDurRTSCTS(series, 2)
| set11nPktDurRTSCTS(series, 3);
ads->ds_ctl7 = set11nRateFlags(series, 0)
| set11nRateFlags(series, 1)
| set11nRateFlags(series, 2)
| set11nRateFlags(series, 3)
| SM(rtsctsRate, AR_RTSCTSRate);
last_ads->ds_ctl2 = ads->ds_ctl2;
last_ads->ds_ctl3 = ads->ds_ctl3;
}
EXPORT_SYMBOL(ath9k_hw_set11n_ratescenario);
void ath9k_hw_set11n_aggr_first(struct ath_hw *ah, struct ath_desc *ds,
u32 aggrLen)
{
struct ar5416_desc *ads = AR5416DESC(ds);
ads->ds_ctl1 |= (AR_IsAggr | AR_MoreAggr);
ads->ds_ctl6 &= ~AR_AggrLen;
ads->ds_ctl6 |= SM(aggrLen, AR_AggrLen);
}
EXPORT_SYMBOL(ath9k_hw_set11n_aggr_first);
void ath9k_hw_set11n_aggr_middle(struct ath_hw *ah, struct ath_desc *ds,
u32 numDelims)
{
struct ar5416_desc *ads = AR5416DESC(ds);
unsigned int ctl6;
ads->ds_ctl1 |= (AR_IsAggr | AR_MoreAggr);
ctl6 = ads->ds_ctl6;
ctl6 &= ~AR_PadDelim;
ctl6 |= SM(numDelims, AR_PadDelim);
ads->ds_ctl6 = ctl6;
}
EXPORT_SYMBOL(ath9k_hw_set11n_aggr_middle);
void ath9k_hw_set11n_aggr_last(struct ath_hw *ah, struct ath_desc *ds)
{
struct ar5416_desc *ads = AR5416DESC(ds);
ads->ds_ctl1 |= AR_IsAggr;
ads->ds_ctl1 &= ~AR_MoreAggr;
ads->ds_ctl6 &= ~AR_PadDelim;
}
EXPORT_SYMBOL(ath9k_hw_set11n_aggr_last);
void ath9k_hw_clr11n_aggr(struct ath_hw *ah, struct ath_desc *ds)
{
struct ar5416_desc *ads = AR5416DESC(ds);
ads->ds_ctl1 &= (~AR_IsAggr & ~AR_MoreAggr);
}
EXPORT_SYMBOL(ath9k_hw_clr11n_aggr);
void ath9k_hw_set11n_burstduration(struct ath_hw *ah, struct ath_desc *ds,
u32 burstDuration)
{
struct ar5416_desc *ads = AR5416DESC(ds);
ads->ds_ctl2 &= ~AR_BurstDur;
ads->ds_ctl2 |= SM(burstDuration, AR_BurstDur);
}
EXPORT_SYMBOL(ath9k_hw_set11n_burstduration);
void ath9k_hw_set11n_virtualmorefrag(struct ath_hw *ah, struct ath_desc *ds,
u32 vmf)
{
struct ar5416_desc *ads = AR5416DESC(ds);
if (vmf)
ads->ds_ctl0 |= AR_VirtMoreFrag;
else
ads->ds_ctl0 &= ~AR_VirtMoreFrag;
}
void ath9k_hw_gettxintrtxqs(struct ath_hw *ah, u32 *txqs)
{
*txqs &= ah->intr_txqs;
ah->intr_txqs &= ~(*txqs);
}
EXPORT_SYMBOL(ath9k_hw_gettxintrtxqs);
bool ath9k_hw_set_txq_props(struct ath_hw *ah, int q,
const struct ath9k_tx_queue_info *qinfo)
{
u32 cw;
struct ath_common *common = ath9k_hw_common(ah);
struct ath9k_hw_capabilities *pCap = &ah->caps;
struct ath9k_tx_queue_info *qi;
if (q >= pCap->total_queues) {
ath_print(common, ATH_DBG_QUEUE, "Set TXQ properties, "
"invalid queue: %u\n", q);
return false;
}
qi = &ah->txq[q];
if (qi->tqi_type == ATH9K_TX_QUEUE_INACTIVE) {
ath_print(common, ATH_DBG_QUEUE, "Set TXQ properties, "
"inactive queue: %u\n", q);
return false;
}
ath_print(common, ATH_DBG_QUEUE, "Set queue properties for: %u\n", q);
qi->tqi_ver = qinfo->tqi_ver;
qi->tqi_subtype = qinfo->tqi_subtype;
qi->tqi_qflags = qinfo->tqi_qflags;
qi->tqi_priority = qinfo->tqi_priority;
if (qinfo->tqi_aifs != ATH9K_TXQ_USEDEFAULT)
qi->tqi_aifs = min(qinfo->tqi_aifs, 255U);
else
qi->tqi_aifs = INIT_AIFS;
if (qinfo->tqi_cwmin != ATH9K_TXQ_USEDEFAULT) {
cw = min(qinfo->tqi_cwmin, 1024U);
qi->tqi_cwmin = 1;
while (qi->tqi_cwmin < cw)
qi->tqi_cwmin = (qi->tqi_cwmin << 1) | 1;
} else
qi->tqi_cwmin = qinfo->tqi_cwmin;
if (qinfo->tqi_cwmax != ATH9K_TXQ_USEDEFAULT) {
cw = min(qinfo->tqi_cwmax, 1024U);
qi->tqi_cwmax = 1;
while (qi->tqi_cwmax < cw)
qi->tqi_cwmax = (qi->tqi_cwmax << 1) | 1;
} else
qi->tqi_cwmax = INIT_CWMAX;
if (qinfo->tqi_shretry != 0)
qi->tqi_shretry = min((u32) qinfo->tqi_shretry, 15U);
else
qi->tqi_shretry = INIT_SH_RETRY;
if (qinfo->tqi_lgretry != 0)
qi->tqi_lgretry = min((u32) qinfo->tqi_lgretry, 15U);
else
qi->tqi_lgretry = INIT_LG_RETRY;
qi->tqi_cbrPeriod = qinfo->tqi_cbrPeriod;
qi->tqi_cbrOverflowLimit = qinfo->tqi_cbrOverflowLimit;
qi->tqi_burstTime = qinfo->tqi_burstTime;
qi->tqi_readyTime = qinfo->tqi_readyTime;
switch (qinfo->tqi_subtype) {
case ATH9K_WME_UPSD:
if (qi->tqi_type == ATH9K_TX_QUEUE_DATA)
qi->tqi_intFlags = ATH9K_TXQ_USE_LOCKOUT_BKOFF_DIS;
break;
default:
break;
}
return true;
}
EXPORT_SYMBOL(ath9k_hw_set_txq_props);
bool ath9k_hw_get_txq_props(struct ath_hw *ah, int q,
struct ath9k_tx_queue_info *qinfo)
{
struct ath_common *common = ath9k_hw_common(ah);
struct ath9k_hw_capabilities *pCap = &ah->caps;
struct ath9k_tx_queue_info *qi;
if (q >= pCap->total_queues) {
ath_print(common, ATH_DBG_QUEUE, "Get TXQ properties, "
"invalid queue: %u\n", q);
return false;
}
qi = &ah->txq[q];
if (qi->tqi_type == ATH9K_TX_QUEUE_INACTIVE) {
ath_print(common, ATH_DBG_QUEUE, "Get TXQ properties, "
"inactive queue: %u\n", q);
return false;
}
qinfo->tqi_qflags = qi->tqi_qflags;
qinfo->tqi_ver = qi->tqi_ver;
qinfo->tqi_subtype = qi->tqi_subtype;
qinfo->tqi_qflags = qi->tqi_qflags;
qinfo->tqi_priority = qi->tqi_priority;
qinfo->tqi_aifs = qi->tqi_aifs;
qinfo->tqi_cwmin = qi->tqi_cwmin;
qinfo->tqi_cwmax = qi->tqi_cwmax;
qinfo->tqi_shretry = qi->tqi_shretry;
qinfo->tqi_lgretry = qi->tqi_lgretry;
qinfo->tqi_cbrPeriod = qi->tqi_cbrPeriod;
qinfo->tqi_cbrOverflowLimit = qi->tqi_cbrOverflowLimit;
qinfo->tqi_burstTime = qi->tqi_burstTime;
qinfo->tqi_readyTime = qi->tqi_readyTime;
return true;
}
EXPORT_SYMBOL(ath9k_hw_get_txq_props);
int ath9k_hw_setuptxqueue(struct ath_hw *ah, enum ath9k_tx_queue type,
const struct ath9k_tx_queue_info *qinfo)
{
struct ath_common *common = ath9k_hw_common(ah);
struct ath9k_tx_queue_info *qi;
struct ath9k_hw_capabilities *pCap = &ah->caps;
int q;
switch (type) {
case ATH9K_TX_QUEUE_BEACON:
q = pCap->total_queues - 1;
break;
case ATH9K_TX_QUEUE_CAB:
q = pCap->total_queues - 2;
break;
case ATH9K_TX_QUEUE_PSPOLL:
q = 1;
break;
case ATH9K_TX_QUEUE_UAPSD:
q = pCap->total_queues - 3;
break;
case ATH9K_TX_QUEUE_DATA:
for (q = 0; q < pCap->total_queues; q++)
if (ah->txq[q].tqi_type ==
ATH9K_TX_QUEUE_INACTIVE)
break;
if (q == pCap->total_queues) {
ath_print(common, ATH_DBG_FATAL,
"No available TX queue\n");
return -1;
}
break;
default:
ath_print(common, ATH_DBG_FATAL,
"Invalid TX queue type: %u\n", type);
return -1;
}
ath_print(common, ATH_DBG_QUEUE, "Setup TX queue: %u\n", q);
qi = &ah->txq[q];
if (qi->tqi_type != ATH9K_TX_QUEUE_INACTIVE) {
ath_print(common, ATH_DBG_FATAL,
"TX queue: %u already active\n", q);
return -1;
}
memset(qi, 0, sizeof(struct ath9k_tx_queue_info));
qi->tqi_type = type;
if (qinfo == NULL) {
qi->tqi_qflags =
TXQ_FLAG_TXOKINT_ENABLE
| TXQ_FLAG_TXERRINT_ENABLE
| TXQ_FLAG_TXDESCINT_ENABLE | TXQ_FLAG_TXURNINT_ENABLE;
qi->tqi_aifs = INIT_AIFS;
qi->tqi_cwmin = ATH9K_TXQ_USEDEFAULT;
qi->tqi_cwmax = INIT_CWMAX;
qi->tqi_shretry = INIT_SH_RETRY;
qi->tqi_lgretry = INIT_LG_RETRY;
qi->tqi_physCompBuf = 0;
} else {
qi->tqi_physCompBuf = qinfo->tqi_physCompBuf;
(void) ath9k_hw_set_txq_props(ah, q, qinfo);
}
return q;
}
EXPORT_SYMBOL(ath9k_hw_setuptxqueue);
bool ath9k_hw_releasetxqueue(struct ath_hw *ah, u32 q)
{
struct ath9k_hw_capabilities *pCap = &ah->caps;
struct ath_common *common = ath9k_hw_common(ah);
struct ath9k_tx_queue_info *qi;
if (q >= pCap->total_queues) {
ath_print(common, ATH_DBG_QUEUE, "Release TXQ, "
"invalid queue: %u\n", q);
return false;
}
qi = &ah->txq[q];
if (qi->tqi_type == ATH9K_TX_QUEUE_INACTIVE) {
ath_print(common, ATH_DBG_QUEUE, "Release TXQ, "
"inactive queue: %u\n", q);
return false;
}
ath_print(common, ATH_DBG_QUEUE, "Release TX queue: %u\n", q);
qi->tqi_type = ATH9K_TX_QUEUE_INACTIVE;
ah->txok_interrupt_mask &= ~(1 << q);
ah->txerr_interrupt_mask &= ~(1 << q);
ah->txdesc_interrupt_mask &= ~(1 << q);
ah->txeol_interrupt_mask &= ~(1 << q);
ah->txurn_interrupt_mask &= ~(1 << q);
ath9k_hw_set_txq_interrupts(ah, qi);
return true;
}
EXPORT_SYMBOL(ath9k_hw_releasetxqueue);
bool ath9k_hw_resettxqueue(struct ath_hw *ah, u32 q)
{
struct ath9k_hw_capabilities *pCap = &ah->caps;
struct ath_common *common = ath9k_hw_common(ah);
struct ath9k_channel *chan = ah->curchan;
struct ath9k_tx_queue_info *qi;
u32 cwMin, chanCwMin, value;
if (q >= pCap->total_queues) {
ath_print(common, ATH_DBG_QUEUE, "Reset TXQ, "
"invalid queue: %u\n", q);
return false;
}
qi = &ah->txq[q];
if (qi->tqi_type == ATH9K_TX_QUEUE_INACTIVE) {
ath_print(common, ATH_DBG_QUEUE, "Reset TXQ, "
"inactive queue: %u\n", q);
return true;
}
ath_print(common, ATH_DBG_QUEUE, "Reset TX queue: %u\n", q);
if (qi->tqi_cwmin == ATH9K_TXQ_USEDEFAULT) {
if (chan && IS_CHAN_B(chan))
chanCwMin = INIT_CWMIN_11B;
else
chanCwMin = INIT_CWMIN;
for (cwMin = 1; cwMin < chanCwMin; cwMin = (cwMin << 1) | 1);
} else
cwMin = qi->tqi_cwmin;
REG_WRITE(ah, AR_DLCL_IFS(q),
SM(cwMin, AR_D_LCL_IFS_CWMIN) |
SM(qi->tqi_cwmax, AR_D_LCL_IFS_CWMAX) |
SM(qi->tqi_aifs, AR_D_LCL_IFS_AIFS));
REG_WRITE(ah, AR_DRETRY_LIMIT(q),
SM(INIT_SSH_RETRY, AR_D_RETRY_LIMIT_STA_SH) |
SM(INIT_SLG_RETRY, AR_D_RETRY_LIMIT_STA_LG) |
SM(qi->tqi_shretry, AR_D_RETRY_LIMIT_FR_SH));
REG_WRITE(ah, AR_QMISC(q), AR_Q_MISC_DCU_EARLY_TERM_REQ);
REG_WRITE(ah, AR_DMISC(q),
AR_D_MISC_CW_BKOFF_EN | AR_D_MISC_FRAG_WAIT_EN | 0x2);
if (qi->tqi_cbrPeriod) {
REG_WRITE(ah, AR_QCBRCFG(q),
SM(qi->tqi_cbrPeriod, AR_Q_CBRCFG_INTERVAL) |
SM(qi->tqi_cbrOverflowLimit, AR_Q_CBRCFG_OVF_THRESH));
REG_WRITE(ah, AR_QMISC(q),
REG_READ(ah, AR_QMISC(q)) | AR_Q_MISC_FSP_CBR |
(qi->tqi_cbrOverflowLimit ?
AR_Q_MISC_CBR_EXP_CNTR_LIMIT_EN : 0));
}
if (qi->tqi_readyTime && (qi->tqi_type != ATH9K_TX_QUEUE_CAB)) {
REG_WRITE(ah, AR_QRDYTIMECFG(q),
SM(qi->tqi_readyTime, AR_Q_RDYTIMECFG_DURATION) |
AR_Q_RDYTIMECFG_EN);
}
REG_WRITE(ah, AR_DCHNTIME(q),
SM(qi->tqi_burstTime, AR_D_CHNTIME_DUR) |
(qi->tqi_burstTime ? AR_D_CHNTIME_EN : 0));
if (qi->tqi_burstTime
&& (qi->tqi_qflags & TXQ_FLAG_RDYTIME_EXP_POLICY_ENABLE)) {
REG_WRITE(ah, AR_QMISC(q),
REG_READ(ah, AR_QMISC(q)) |
AR_Q_MISC_RDYTIME_EXP_POLICY);
}
if (qi->tqi_qflags & TXQ_FLAG_BACKOFF_DISABLE) {
REG_WRITE(ah, AR_DMISC(q),
REG_READ(ah, AR_DMISC(q)) |
AR_D_MISC_POST_FR_BKOFF_DIS);
}
if (qi->tqi_qflags & TXQ_FLAG_FRAG_BURST_BACKOFF_ENABLE) {
REG_WRITE(ah, AR_DMISC(q),
REG_READ(ah, AR_DMISC(q)) |
AR_D_MISC_FRAG_BKOFF_EN);
}
switch (qi->tqi_type) {
case ATH9K_TX_QUEUE_BEACON:
REG_WRITE(ah, AR_QMISC(q), REG_READ(ah, AR_QMISC(q))
| AR_Q_MISC_FSP_DBA_GATED
| AR_Q_MISC_BEACON_USE
| AR_Q_MISC_CBR_INCR_DIS1);
REG_WRITE(ah, AR_DMISC(q), REG_READ(ah, AR_DMISC(q))
| (AR_D_MISC_ARB_LOCKOUT_CNTRL_GLOBAL <<
AR_D_MISC_ARB_LOCKOUT_CNTRL_S)
| AR_D_MISC_BEACON_USE
| AR_D_MISC_POST_FR_BKOFF_DIS);
break;
case ATH9K_TX_QUEUE_CAB:
REG_WRITE(ah, AR_QMISC(q), REG_READ(ah, AR_QMISC(q))
| AR_Q_MISC_FSP_DBA_GATED
| AR_Q_MISC_CBR_INCR_DIS1
| AR_Q_MISC_CBR_INCR_DIS0);
value = (qi->tqi_readyTime -
(ah->config.sw_beacon_response_time -
ah->config.dma_beacon_response_time) -
ah->config.additional_swba_backoff) * 1024;
REG_WRITE(ah, AR_QRDYTIMECFG(q),
value | AR_Q_RDYTIMECFG_EN);
REG_WRITE(ah, AR_DMISC(q), REG_READ(ah, AR_DMISC(q))
| (AR_D_MISC_ARB_LOCKOUT_CNTRL_GLOBAL <<
AR_D_MISC_ARB_LOCKOUT_CNTRL_S));
break;
case ATH9K_TX_QUEUE_PSPOLL:
REG_WRITE(ah, AR_QMISC(q),
REG_READ(ah, AR_QMISC(q)) | AR_Q_MISC_CBR_INCR_DIS1);
break;
case ATH9K_TX_QUEUE_UAPSD:
REG_WRITE(ah, AR_DMISC(q), REG_READ(ah, AR_DMISC(q)) |
AR_D_MISC_POST_FR_BKOFF_DIS);
break;
default:
break;
}
if (qi->tqi_intFlags & ATH9K_TXQ_USE_LOCKOUT_BKOFF_DIS) {
REG_WRITE(ah, AR_DMISC(q),
REG_READ(ah, AR_DMISC(q)) |
SM(AR_D_MISC_ARB_LOCKOUT_CNTRL_GLOBAL,
AR_D_MISC_ARB_LOCKOUT_CNTRL) |
AR_D_MISC_POST_FR_BKOFF_DIS);
}
if (qi->tqi_qflags & TXQ_FLAG_TXOKINT_ENABLE)
ah->txok_interrupt_mask |= 1 << q;
else
ah->txok_interrupt_mask &= ~(1 << q);
if (qi->tqi_qflags & TXQ_FLAG_TXERRINT_ENABLE)
ah->txerr_interrupt_mask |= 1 << q;
else
ah->txerr_interrupt_mask &= ~(1 << q);
if (qi->tqi_qflags & TXQ_FLAG_TXDESCINT_ENABLE)
ah->txdesc_interrupt_mask |= 1 << q;
else
ah->txdesc_interrupt_mask &= ~(1 << q);
if (qi->tqi_qflags & TXQ_FLAG_TXEOLINT_ENABLE)
ah->txeol_interrupt_mask |= 1 << q;
else
ah->txeol_interrupt_mask &= ~(1 << q);
if (qi->tqi_qflags & TXQ_FLAG_TXURNINT_ENABLE)
ah->txurn_interrupt_mask |= 1 << q;
else
ah->txurn_interrupt_mask &= ~(1 << q);
ath9k_hw_set_txq_interrupts(ah, qi);
return true;
}
EXPORT_SYMBOL(ath9k_hw_resettxqueue);
int ath9k_hw_rxprocdesc(struct ath_hw *ah, struct ath_desc *ds,
u32 pa, struct ath_desc *nds, u64 tsf)
{
struct ar5416_desc ads;
struct ar5416_desc *adsp = AR5416DESC(ds);
u32 phyerr;
if ((adsp->ds_rxstatus8 & AR_RxDone) == 0)
return -EINPROGRESS;
ads.u.rx = adsp->u.rx;
ds->ds_rxstat.rs_status = 0;
ds->ds_rxstat.rs_flags = 0;
ds->ds_rxstat.rs_datalen = ads.ds_rxstatus1 & AR_DataLen;
ds->ds_rxstat.rs_tstamp = ads.AR_RcvTimestamp;
if (ads.ds_rxstatus8 & AR_PostDelimCRCErr) {
ds->ds_rxstat.rs_rssi = ATH9K_RSSI_BAD;
ds->ds_rxstat.rs_rssi_ctl0 = ATH9K_RSSI_BAD;
ds->ds_rxstat.rs_rssi_ctl1 = ATH9K_RSSI_BAD;
ds->ds_rxstat.rs_rssi_ctl2 = ATH9K_RSSI_BAD;
ds->ds_rxstat.rs_rssi_ext0 = ATH9K_RSSI_BAD;
ds->ds_rxstat.rs_rssi_ext1 = ATH9K_RSSI_BAD;
ds->ds_rxstat.rs_rssi_ext2 = ATH9K_RSSI_BAD;
} else {
ds->ds_rxstat.rs_rssi = MS(ads.ds_rxstatus4, AR_RxRSSICombined);
ds->ds_rxstat.rs_rssi_ctl0 = MS(ads.ds_rxstatus0,
AR_RxRSSIAnt00);
ds->ds_rxstat.rs_rssi_ctl1 = MS(ads.ds_rxstatus0,
AR_RxRSSIAnt01);
ds->ds_rxstat.rs_rssi_ctl2 = MS(ads.ds_rxstatus0,
AR_RxRSSIAnt02);
ds->ds_rxstat.rs_rssi_ext0 = MS(ads.ds_rxstatus4,
AR_RxRSSIAnt10);
ds->ds_rxstat.rs_rssi_ext1 = MS(ads.ds_rxstatus4,
AR_RxRSSIAnt11);
ds->ds_rxstat.rs_rssi_ext2 = MS(ads.ds_rxstatus4,
AR_RxRSSIAnt12);
}
if (ads.ds_rxstatus8 & AR_RxKeyIdxValid)
ds->ds_rxstat.rs_keyix = MS(ads.ds_rxstatus8, AR_KeyIdx);
else
ds->ds_rxstat.rs_keyix = ATH9K_RXKEYIX_INVALID;
ds->ds_rxstat.rs_rate = RXSTATUS_RATE(ah, (&ads));
ds->ds_rxstat.rs_more = (ads.ds_rxstatus1 & AR_RxMore) ? 1 : 0;
ds->ds_rxstat.rs_isaggr = (ads.ds_rxstatus8 & AR_RxAggr) ? 1 : 0;
ds->ds_rxstat.rs_moreaggr =
(ads.ds_rxstatus8 & AR_RxMoreAggr) ? 1 : 0;
ds->ds_rxstat.rs_antenna = MS(ads.ds_rxstatus3, AR_RxAntenna);
ds->ds_rxstat.rs_flags =
(ads.ds_rxstatus3 & AR_GI) ? ATH9K_RX_GI : 0;
ds->ds_rxstat.rs_flags |=
(ads.ds_rxstatus3 & AR_2040) ? ATH9K_RX_2040 : 0;
if (ads.ds_rxstatus8 & AR_PreDelimCRCErr)
ds->ds_rxstat.rs_flags |= ATH9K_RX_DELIM_CRC_PRE;
if (ads.ds_rxstatus8 & AR_PostDelimCRCErr)
ds->ds_rxstat.rs_flags |= ATH9K_RX_DELIM_CRC_POST;
if (ads.ds_rxstatus8 & AR_DecryptBusyErr)
ds->ds_rxstat.rs_flags |= ATH9K_RX_DECRYPT_BUSY;
if ((ads.ds_rxstatus8 & AR_RxFrameOK) == 0) {
if (ads.ds_rxstatus8 & AR_CRCErr)
ds->ds_rxstat.rs_status |= ATH9K_RXERR_CRC;
else if (ads.ds_rxstatus8 & AR_PHYErr) {
ds->ds_rxstat.rs_status |= ATH9K_RXERR_PHY;
phyerr = MS(ads.ds_rxstatus8, AR_PHYErrCode);
ds->ds_rxstat.rs_phyerr = phyerr;
} else if (ads.ds_rxstatus8 & AR_DecryptCRCErr)
ds->ds_rxstat.rs_status |= ATH9K_RXERR_DECRYPT;
else if (ads.ds_rxstatus8 & AR_MichaelErr)
ds->ds_rxstat.rs_status |= ATH9K_RXERR_MIC;
}
return 0;
}
EXPORT_SYMBOL(ath9k_hw_rxprocdesc);
void ath9k_hw_setuprxdesc(struct ath_hw *ah, struct ath_desc *ds,
u32 size, u32 flags)
{
struct ar5416_desc *ads = AR5416DESC(ds);
struct ath9k_hw_capabilities *pCap = &ah->caps;
ads->ds_ctl1 = size & AR_BufLen;
if (flags & ATH9K_RXDESC_INTREQ)
ads->ds_ctl1 |= AR_RxIntrReq;
ads->ds_rxstatus8 &= ~AR_RxDone;
if (!(pCap->hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
memset(&(ads->u), 0, sizeof(ads->u));
}
EXPORT_SYMBOL(ath9k_hw_setuprxdesc);
/*
* This can stop or re-enables RX.
*
* If bool is set this will kill any frame which is currently being
* transferred between the MAC and baseband and also prevent any new
* frames from getting started.
*/
bool ath9k_hw_setrxabort(struct ath_hw *ah, bool set)
{
u32 reg;
if (set) {
REG_SET_BIT(ah, AR_DIAG_SW,
(AR_DIAG_RX_DIS | AR_DIAG_RX_ABORT));
if (!ath9k_hw_wait(ah, AR_OBS_BUS_1, AR_OBS_BUS_1_RX_STATE,
0, AH_WAIT_TIMEOUT)) {
REG_CLR_BIT(ah, AR_DIAG_SW,
(AR_DIAG_RX_DIS |
AR_DIAG_RX_ABORT));
reg = REG_READ(ah, AR_OBS_BUS_1);
ath_print(ath9k_hw_common(ah), ATH_DBG_FATAL,
"RX failed to go idle in 10 ms RXSM=0x%x\n",
reg);
return false;
}
} else {
REG_CLR_BIT(ah, AR_DIAG_SW,
(AR_DIAG_RX_DIS | AR_DIAG_RX_ABORT));
}
return true;
}
EXPORT_SYMBOL(ath9k_hw_setrxabort);
void ath9k_hw_putrxbuf(struct ath_hw *ah, u32 rxdp)
{
REG_WRITE(ah, AR_RXDP, rxdp);
}
EXPORT_SYMBOL(ath9k_hw_putrxbuf);
void ath9k_hw_rxena(struct ath_hw *ah)
{
REG_WRITE(ah, AR_CR, AR_CR_RXE);
}
EXPORT_SYMBOL(ath9k_hw_rxena);
void ath9k_hw_startpcureceive(struct ath_hw *ah)
{
ath9k_enable_mib_counters(ah);
ath9k_ani_reset(ah);
REG_CLR_BIT(ah, AR_DIAG_SW, (AR_DIAG_RX_DIS | AR_DIAG_RX_ABORT));
}
EXPORT_SYMBOL(ath9k_hw_startpcureceive);
void ath9k_hw_stoppcurecv(struct ath_hw *ah)
{
REG_SET_BIT(ah, AR_DIAG_SW, AR_DIAG_RX_DIS);
ath9k_hw_disable_mib_counters(ah);
}
EXPORT_SYMBOL(ath9k_hw_stoppcurecv);
bool ath9k_hw_stopdmarecv(struct ath_hw *ah)
{
#define AH_RX_STOP_DMA_TIMEOUT 10000 /* usec */
#define AH_RX_TIME_QUANTUM 100 /* usec */
struct ath_common *common = ath9k_hw_common(ah);
int i;
REG_WRITE(ah, AR_CR, AR_CR_RXD);
/* Wait for rx enable bit to go low */
for (i = AH_RX_STOP_DMA_TIMEOUT / AH_TIME_QUANTUM; i != 0; i--) {
if ((REG_READ(ah, AR_CR) & AR_CR_RXE) == 0)
break;
udelay(AH_TIME_QUANTUM);
}
if (i == 0) {
ath_print(common, ATH_DBG_FATAL,
"DMA failed to stop in %d ms "
"AR_CR=0x%08x AR_DIAG_SW=0x%08x\n",
AH_RX_STOP_DMA_TIMEOUT / 1000,
REG_READ(ah, AR_CR),
REG_READ(ah, AR_DIAG_SW));
return false;
} else {
return true;
}
#undef AH_RX_TIME_QUANTUM
#undef AH_RX_STOP_DMA_TIMEOUT
}
EXPORT_SYMBOL(ath9k_hw_stopdmarecv);
int ath9k_hw_beaconq_setup(struct ath_hw *ah)
{
struct ath9k_tx_queue_info qi;
memset(&qi, 0, sizeof(qi));
qi.tqi_aifs = 1;
qi.tqi_cwmin = 0;
qi.tqi_cwmax = 0;
/* NB: don't enable any interrupts */
return ath9k_hw_setuptxqueue(ah, ATH9K_TX_QUEUE_BEACON, &qi);
}
EXPORT_SYMBOL(ath9k_hw_beaconq_setup);
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