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/*
* Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
* Copyright (c) 2002-2006 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.
*
* $FreeBSD: release/9.1.0/sys/dev/ath/ath_hal/ar5211/ar5211_xmit.c 223459 2011-06-23 02:38:36Z adrian $
*/
#include "opt_ah.h"
#include "ah.h"
#include "ah_internal.h"
#include "ah_desc.h"
#include "ar5211/ar5211.h"
#include "ar5211/ar5211reg.h"
#include "ar5211/ar5211desc.h"
/*
* Update Tx FIFO trigger level.
*
* Set bIncTrigLevel to TRUE to increase the trigger level.
* Set bIncTrigLevel to FALSE to decrease the trigger level.
*
* Returns TRUE if the trigger level was updated
*/
HAL_BOOL
ar5211UpdateTxTrigLevel(struct ath_hal *ah, HAL_BOOL bIncTrigLevel)
{
uint32_t curTrigLevel, txcfg;
HAL_INT ints = ar5211GetInterrupts(ah);
/*
* Disable chip interrupts. This is because halUpdateTxTrigLevel
* is called from both ISR and non-ISR contexts.
*/
ar5211SetInterrupts(ah, ints &~ HAL_INT_GLOBAL);
txcfg = OS_REG_READ(ah, AR_TXCFG);
curTrigLevel = (txcfg & AR_TXCFG_FTRIG_M) >> AR_TXCFG_FTRIG_S;
if (bIncTrigLevel){
/* increase the trigger level */
curTrigLevel = curTrigLevel +
((MAX_TX_FIFO_THRESHOLD - curTrigLevel) / 2);
} else {
/* decrease the trigger level if not already at the minimum */
if (curTrigLevel > MIN_TX_FIFO_THRESHOLD) {
/* decrease the trigger level */
curTrigLevel--;
} else {
/* no update to the trigger level */
/* re-enable chip interrupts */
ar5211SetInterrupts(ah, ints);
return AH_FALSE;
}
}
/* Update the trigger level */
OS_REG_WRITE(ah, AR_TXCFG, (txcfg &~ AR_TXCFG_FTRIG_M) |
((curTrigLevel << AR_TXCFG_FTRIG_S) & AR_TXCFG_FTRIG_M));
/* re-enable chip interrupts */
ar5211SetInterrupts(ah, ints);
return AH_TRUE;
}
/*
* Set the properties of the tx queue with the parameters
* from qInfo. The queue must previously have been setup
* with a call to ar5211SetupTxQueue.
*/
HAL_BOOL
ar5211SetTxQueueProps(struct ath_hal *ah, int q, const HAL_TXQ_INFO *qInfo)
{
struct ath_hal_5211 *ahp = AH5211(ah);
if (q >= HAL_NUM_TX_QUEUES) {
HALDEBUG(ah, HAL_DEBUG_ANY, "%s: invalid queue num %u\n",
__func__, q);
return AH_FALSE;
}
return ath_hal_setTxQProps(ah, &ahp->ah_txq[q], qInfo);
}
/*
* Return the properties for the specified tx queue.
*/
HAL_BOOL
ar5211GetTxQueueProps(struct ath_hal *ah, int q, HAL_TXQ_INFO *qInfo)
{
struct ath_hal_5211 *ahp = AH5211(ah);
if (q >= HAL_NUM_TX_QUEUES) {
HALDEBUG(ah, HAL_DEBUG_ANY, "%s: invalid queue num %u\n",
__func__, q);
return AH_FALSE;
}
return ath_hal_getTxQProps(ah, qInfo, &ahp->ah_txq[q]);
}
/*
* Allocate and initialize a tx DCU/QCU combination.
*/
int
ar5211SetupTxQueue(struct ath_hal *ah, HAL_TX_QUEUE type,
const HAL_TXQ_INFO *qInfo)
{
struct ath_hal_5211 *ahp = AH5211(ah);
HAL_TX_QUEUE_INFO *qi;
int q;
switch (type) {
case HAL_TX_QUEUE_BEACON:
q = 9;
break;
case HAL_TX_QUEUE_CAB:
q = 8;
break;
case HAL_TX_QUEUE_DATA:
q = 0;
if (ahp->ah_txq[q].tqi_type != HAL_TX_QUEUE_INACTIVE)
return q;
break;
default:
HALDEBUG(ah, HAL_DEBUG_ANY, "%s: bad tx queue type %u\n",
__func__, type);
return -1;
}
HALDEBUG(ah, HAL_DEBUG_TXQUEUE, "%s: queue %u\n", __func__, q);
qi = &ahp->ah_txq[q];
if (qi->tqi_type != HAL_TX_QUEUE_INACTIVE) {
HALDEBUG(ah, HAL_DEBUG_ANY, "%s: tx queue %u already active\n",
__func__, q);
return -1;
}
OS_MEMZERO(qi, sizeof(HAL_TX_QUEUE_INFO));
qi->tqi_type = type;
if (qInfo == AH_NULL) {
/* by default enable OK+ERR+DESC+URN interrupts */
qi->tqi_qflags =
HAL_TXQ_TXOKINT_ENABLE
| HAL_TXQ_TXERRINT_ENABLE
| HAL_TXQ_TXDESCINT_ENABLE
| HAL_TXQ_TXURNINT_ENABLE
;
qi->tqi_aifs = INIT_AIFS;
qi->tqi_cwmin = HAL_TXQ_USEDEFAULT; /* NB: do at reset */
qi->tqi_cwmax = INIT_CWMAX;
qi->tqi_shretry = INIT_SH_RETRY;
qi->tqi_lgretry = INIT_LG_RETRY;
} else
(void) ar5211SetTxQueueProps(ah, q, qInfo);
return q;
}
/*
* Update the h/w interrupt registers to reflect a tx q's configuration.
*/
static void
setTxQInterrupts(struct ath_hal *ah, HAL_TX_QUEUE_INFO *qi)
{
struct ath_hal_5211 *ahp = AH5211(ah);
HALDEBUG(ah, HAL_DEBUG_TXQUEUE,
"%s: tx ok 0x%x err 0x%x desc 0x%x eol 0x%x urn 0x%x\n", __func__
, ahp->ah_txOkInterruptMask
, ahp->ah_txErrInterruptMask
, ahp->ah_txDescInterruptMask
, ahp->ah_txEolInterruptMask
, ahp->ah_txUrnInterruptMask
);
OS_REG_WRITE(ah, AR_IMR_S0,
SM(ahp->ah_txOkInterruptMask, AR_IMR_S0_QCU_TXOK)
| SM(ahp->ah_txDescInterruptMask, AR_IMR_S0_QCU_TXDESC)
);
OS_REG_WRITE(ah, AR_IMR_S1,
SM(ahp->ah_txErrInterruptMask, AR_IMR_S1_QCU_TXERR)
| SM(ahp->ah_txEolInterruptMask, AR_IMR_S1_QCU_TXEOL)
);
OS_REG_RMW_FIELD(ah, AR_IMR_S2,
AR_IMR_S2_QCU_TXURN, ahp->ah_txUrnInterruptMask);
}
/*
* Free a tx DCU/QCU combination.
*/
HAL_BOOL
ar5211ReleaseTxQueue(struct ath_hal *ah, u_int q)
{
struct ath_hal_5211 *ahp = AH5211(ah);
HAL_TX_QUEUE_INFO *qi;
if (q >= HAL_NUM_TX_QUEUES) {
HALDEBUG(ah, HAL_DEBUG_ANY, "%s: invalid queue num %u\n",
__func__, q);
return AH_FALSE;
}
qi = &ahp->ah_txq[q];
if (qi->tqi_type == HAL_TX_QUEUE_INACTIVE) {
HALDEBUG(ah, HAL_DEBUG_TXQUEUE, "%s: inactive queue %u\n",
__func__, q);
return AH_FALSE;
}
HALDEBUG(ah, HAL_DEBUG_TXQUEUE, "%s: release queue %u\n", __func__, q);
qi->tqi_type = HAL_TX_QUEUE_INACTIVE;
ahp->ah_txOkInterruptMask &= ~(1 << q);
ahp->ah_txErrInterruptMask &= ~(1 << q);
ahp->ah_txDescInterruptMask &= ~(1 << q);
ahp->ah_txEolInterruptMask &= ~(1 << q);
ahp->ah_txUrnInterruptMask &= ~(1 << q);
setTxQInterrupts(ah, qi);
return AH_TRUE;
}
/*
* Set the retry, aifs, cwmin/max, readyTime regs for specified queue
*/
HAL_BOOL
ar5211ResetTxQueue(struct ath_hal *ah, u_int q)
{
struct ath_hal_5211 *ahp = AH5211(ah);
const struct ieee80211_channel *chan = AH_PRIVATE(ah)->ah_curchan;
HAL_TX_QUEUE_INFO *qi;
uint32_t cwMin, chanCwMin, value;
if (q >= HAL_NUM_TX_QUEUES) {
HALDEBUG(ah, HAL_DEBUG_ANY, "%s: invalid queue num %u\n",
__func__, q);
return AH_FALSE;
}
qi = &ahp->ah_txq[q];
if (qi->tqi_type == HAL_TX_QUEUE_INACTIVE) {
HALDEBUG(ah, HAL_DEBUG_TXQUEUE, "%s: inactive queue %u\n",
__func__, q);
return AH_TRUE; /* XXX??? */
}
if (qi->tqi_cwmin == HAL_TXQ_USEDEFAULT) {
/*
* Select cwmin according to channel type.
* NB: chan can be NULL during attach
*/
if (chan && IEEE80211_IS_CHAN_B(chan))
chanCwMin = INIT_CWMIN_11B;
else
chanCwMin = INIT_CWMIN;
/* make sure that the CWmin is of the form (2^n - 1) */
for (cwMin = 1; cwMin < chanCwMin; cwMin = (cwMin << 1) | 1)
;
} else
cwMin = qi->tqi_cwmin;
/* set cwMin/Max and AIFS values */
OS_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));
/* Set retry limit values */
OS_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_lgretry, AR_D_RETRY_LIMIT_FR_LG)
| SM(qi->tqi_shretry, AR_D_RETRY_LIMIT_FR_SH)
);
/* enable early termination on the QCU */
OS_REG_WRITE(ah, AR_QMISC(q), AR_Q_MISC_DCU_EARLY_TERM_REQ);
if (AH_PRIVATE(ah)->ah_macVersion < AR_SREV_VERSION_OAHU) {
/* Configure DCU to use the global sequence count */
OS_REG_WRITE(ah, AR_DMISC(q), AR5311_D_MISC_SEQ_NUM_CONTROL);
}
/* multiqueue support */
if (qi->tqi_cbrPeriod) {
OS_REG_WRITE(ah, AR_QCBRCFG(q),
SM(qi->tqi_cbrPeriod,AR_Q_CBRCFG_CBR_INTERVAL)
| SM(qi->tqi_cbrOverflowLimit, AR_Q_CBRCFG_CBR_OVF_THRESH));
OS_REG_WRITE(ah, AR_QMISC(q),
OS_REG_READ(ah, AR_QMISC(q)) |
AR_Q_MISC_FSP_CBR |
(qi->tqi_cbrOverflowLimit ?
AR_Q_MISC_CBR_EXP_CNTR_LIMIT : 0));
}
if (qi->tqi_readyTime) {
OS_REG_WRITE(ah, AR_QRDYTIMECFG(q),
SM(qi->tqi_readyTime, AR_Q_RDYTIMECFG_INT) |
AR_Q_RDYTIMECFG_EN);
}
if (qi->tqi_burstTime) {
OS_REG_WRITE(ah, AR_DCHNTIME(q),
SM(qi->tqi_burstTime, AR_D_CHNTIME_DUR) |
AR_D_CHNTIME_EN);
if (qi->tqi_qflags & HAL_TXQ_RDYTIME_EXP_POLICY_ENABLE) {
OS_REG_WRITE(ah, AR_QMISC(q),
OS_REG_READ(ah, AR_QMISC(q)) |
AR_Q_MISC_RDYTIME_EXP_POLICY);
}
}
if (qi->tqi_qflags & HAL_TXQ_BACKOFF_DISABLE) {
OS_REG_WRITE(ah, AR_DMISC(q),
OS_REG_READ(ah, AR_DMISC(q)) |
AR_D_MISC_POST_FR_BKOFF_DIS);
}
if (qi->tqi_qflags & HAL_TXQ_FRAG_BURST_BACKOFF_ENABLE) {
OS_REG_WRITE(ah, AR_DMISC(q),
OS_REG_READ(ah, AR_DMISC(q)) |
AR_D_MISC_FRAG_BKOFF_EN);
}
switch (qi->tqi_type) {
case HAL_TX_QUEUE_BEACON:
/* Configure QCU for beacons */
OS_REG_WRITE(ah, AR_QMISC(q),
OS_REG_READ(ah, AR_QMISC(q))
| AR_Q_MISC_FSP_DBA_GATED
| AR_Q_MISC_BEACON_USE
| AR_Q_MISC_CBR_INCR_DIS1);
/* Configure DCU for beacons */
value = (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;
if (AH_PRIVATE(ah)->ah_macVersion < AR_SREV_VERSION_OAHU)
value |= AR5311_D_MISC_SEQ_NUM_CONTROL;
OS_REG_WRITE(ah, AR_DMISC(q), value);
break;
case HAL_TX_QUEUE_CAB:
/* Configure QCU for CAB (Crap After Beacon) frames */
OS_REG_WRITE(ah, AR_QMISC(q),
OS_REG_READ(ah, AR_QMISC(q))
| AR_Q_MISC_FSP_DBA_GATED | AR_Q_MISC_CBR_INCR_DIS1
| AR_Q_MISC_CBR_INCR_DIS0 | AR_Q_MISC_RDYTIME_EXP_POLICY);
value = (ahp->ah_beaconInterval
- (ah->ah_config.ah_sw_beacon_response_time
- ah->ah_config.ah_dma_beacon_response_time)
- ah->ah_config.ah_additional_swba_backoff) * 1024;
OS_REG_WRITE(ah, AR_QRDYTIMECFG(q), value | AR_Q_RDYTIMECFG_EN);
/* Configure DCU for CAB */
value = (AR_D_MISC_ARB_LOCKOUT_CNTRL_GLOBAL << AR_D_MISC_ARB_LOCKOUT_CNTRL_S);
if (AH_PRIVATE(ah)->ah_macVersion < AR_SREV_VERSION_OAHU)
value |= AR5311_D_MISC_SEQ_NUM_CONTROL;
OS_REG_WRITE(ah, AR_QMISC(q), value);
break;
default:
/* NB: silence compiler */
break;
}
/*
* Always update the secondary interrupt mask registers - this
* could be a new queue getting enabled in a running system or
* hw getting re-initialized during a reset!
*
* Since we don't differentiate between tx interrupts corresponding
* to individual queues - secondary tx mask regs are always unmasked;
* tx interrupts are enabled/disabled for all queues collectively
* using the primary mask reg
*/
if (qi->tqi_qflags & HAL_TXQ_TXOKINT_ENABLE)
ahp->ah_txOkInterruptMask |= 1 << q;
else
ahp->ah_txOkInterruptMask &= ~(1 << q);
if (qi->tqi_qflags & HAL_TXQ_TXERRINT_ENABLE)
ahp->ah_txErrInterruptMask |= 1 << q;
else
ahp->ah_txErrInterruptMask &= ~(1 << q);
if (qi->tqi_qflags & HAL_TXQ_TXDESCINT_ENABLE)
ahp->ah_txDescInterruptMask |= 1 << q;
else
ahp->ah_txDescInterruptMask &= ~(1 << q);
if (qi->tqi_qflags & HAL_TXQ_TXEOLINT_ENABLE)
ahp->ah_txEolInterruptMask |= 1 << q;
else
ahp->ah_txEolInterruptMask &= ~(1 << q);
if (qi->tqi_qflags & HAL_TXQ_TXURNINT_ENABLE)
ahp->ah_txUrnInterruptMask |= 1 << q;
else
ahp->ah_txUrnInterruptMask &= ~(1 << q);
setTxQInterrupts(ah, qi);
return AH_TRUE;
}
/*
* Get the TXDP for the specified data queue.
*/
uint32_t
ar5211GetTxDP(struct ath_hal *ah, u_int q)
{
HALASSERT(q < HAL_NUM_TX_QUEUES);
return OS_REG_READ(ah, AR_QTXDP(q));
}
/*
* Set the TxDP for the specified tx queue.
*/
HAL_BOOL
ar5211SetTxDP(struct ath_hal *ah, u_int q, uint32_t txdp)
{
HALASSERT(q < HAL_NUM_TX_QUEUES);
HALASSERT(AH5211(ah)->ah_txq[q].tqi_type != HAL_TX_QUEUE_INACTIVE);
/*
* Make sure that TXE is deasserted before setting the TXDP. If TXE
* is still asserted, setting TXDP will have no effect.
*/
HALASSERT((OS_REG_READ(ah, AR_Q_TXE) & (1 << q)) == 0);
OS_REG_WRITE(ah, AR_QTXDP(q), txdp);
return AH_TRUE;
}
/*
* Set Transmit Enable bits for the specified queues.
*/
HAL_BOOL
ar5211StartTxDma(struct ath_hal *ah, u_int q)
{
HALASSERT(q < HAL_NUM_TX_QUEUES);
HALASSERT(AH5211(ah)->ah_txq[q].tqi_type != HAL_TX_QUEUE_INACTIVE);
/* Check that queue is not already active */
HALASSERT((OS_REG_READ(ah, AR_Q_TXD) & (1<<q)) == 0);
HALDEBUG(ah, HAL_DEBUG_TXQUEUE, "%s: queue %u\n", __func__, q);
/* Check to be sure we're not enabling a q that has its TXD bit set. */
HALASSERT((OS_REG_READ(ah, AR_Q_TXD) & (1 << q)) == 0);
OS_REG_WRITE(ah, AR_Q_TXE, 1 << q);
return AH_TRUE;
}
/*
* Return the number of frames pending on the specified queue.
*/
uint32_t
ar5211NumTxPending(struct ath_hal *ah, u_int q)
{
uint32_t n;
HALASSERT(q < HAL_NUM_TX_QUEUES);
HALASSERT(AH5211(ah)->ah_txq[q].tqi_type != HAL_TX_QUEUE_INACTIVE);
n = OS_REG_READ(ah, AR_QSTS(q)) & AR_Q_STS_PEND_FR_CNT_M;
/*
* Pending frame count (PFC) can momentarily go to zero
* while TXE remains asserted. In other words a PFC of
* zero is not sufficient to say that the queue has stopped.
*/
if (n == 0 && (OS_REG_READ(ah, AR_Q_TXE) & (1<<q)))
n = 1; /* arbitrarily pick 1 */
return n;
}
/*
* Stop transmit on the specified queue
*/
HAL_BOOL
ar5211StopTxDma(struct ath_hal *ah, u_int q)
{
int i;
HALASSERT(q < HAL_NUM_TX_QUEUES);
HALASSERT(AH5211(ah)->ah_txq[q].tqi_type != HAL_TX_QUEUE_INACTIVE);
OS_REG_WRITE(ah, AR_Q_TXD, 1<<q);
for (i = 0; i < 10000; i++) {
if (ar5211NumTxPending(ah, q) == 0)
break;
OS_DELAY(10);
}
OS_REG_WRITE(ah, AR_Q_TXD, 0);
return (i < 10000);
}
/*
* Descriptor Access Functions
*/
#define VALID_PKT_TYPES \
((1<<HAL_PKT_TYPE_NORMAL)|(1<<HAL_PKT_TYPE_ATIM)|\
(1<<HAL_PKT_TYPE_PSPOLL)|(1<<HAL_PKT_TYPE_PROBE_RESP)|\
(1<<HAL_PKT_TYPE_BEACON))
#define isValidPktType(_t) ((1<<(_t)) & VALID_PKT_TYPES)
#define VALID_TX_RATES \
((1<<0x0b)|(1<<0x0f)|(1<<0x0a)|(1<<0x0e)|(1<<0x09)|(1<<0x0d)|\
(1<<0x08)|(1<<0x0c)|(1<<0x1b)|(1<<0x1a)|(1<<0x1e)|(1<<0x19)|\
(1<<0x1d)|(1<<0x18)|(1<<0x1c))
#define isValidTxRate(_r) ((1<<(_r)) & VALID_TX_RATES)
HAL_BOOL
ar5211SetupTxDesc(struct ath_hal *ah, struct ath_desc *ds,
u_int pktLen,
u_int hdrLen,
HAL_PKT_TYPE type,
u_int txPower,
u_int txRate0, u_int txTries0,
u_int keyIx,
u_int antMode,
u_int flags,
u_int rtsctsRate,
u_int rtsctsDuration,
u_int compicvLen,
u_int compivLen,
u_int comp)
{
struct ar5211_desc *ads = AR5211DESC(ds);
(void) hdrLen;
(void) txPower;
(void) rtsctsRate; (void) rtsctsDuration;
HALASSERT(txTries0 != 0);
HALASSERT(isValidPktType(type));
HALASSERT(isValidTxRate(txRate0));
/* XXX validate antMode */
ads->ds_ctl0 = (pktLen & AR_FrameLen)
| (txRate0 << AR_XmitRate_S)
| (antMode << AR_AntModeXmit_S)
| (flags & HAL_TXDESC_CLRDMASK ? AR_ClearDestMask : 0)
| (flags & HAL_TXDESC_INTREQ ? AR_TxInterReq : 0)
| (flags & HAL_TXDESC_RTSENA ? AR_RTSCTSEnable : 0)
| (flags & HAL_TXDESC_VEOL ? AR_VEOL : 0)
;
ads->ds_ctl1 = (type << 26)
| (flags & HAL_TXDESC_NOACK ? AR_NoAck : 0)
;
if (keyIx != HAL_TXKEYIX_INVALID) {
ads->ds_ctl1 |=
(keyIx << AR_EncryptKeyIdx_S) & AR_EncryptKeyIdx;
ads->ds_ctl0 |= AR_EncryptKeyValid;
}
return AH_TRUE;
#undef RATE
}
HAL_BOOL
ar5211SetupXTxDesc(struct ath_hal *ah, struct ath_desc *ds,
u_int txRate1, u_int txTries1,
u_int txRate2, u_int txTries2,
u_int txRate3, u_int txTries3)
{
(void) ah; (void) ds;
(void) txRate1; (void) txTries1;
(void) txRate2; (void) txTries2;
(void) txRate3; (void) txTries3;
return AH_FALSE;
}
void
ar5211IntrReqTxDesc(struct ath_hal *ah, struct ath_desc *ds)
{
struct ar5211_desc *ads = AR5211DESC(ds);
ads->ds_ctl0 |= AR_TxInterReq;
}
HAL_BOOL
ar5211FillTxDesc(struct ath_hal *ah, struct ath_desc *ds,
u_int segLen, HAL_BOOL firstSeg, HAL_BOOL lastSeg,
const struct ath_desc *ds0)
{
struct ar5211_desc *ads = AR5211DESC(ds);
HALASSERT((segLen &~ AR_BufLen) == 0);
if (firstSeg) {
/*
* First descriptor, don't clobber xmit control data
* setup by ar5211SetupTxDesc.
*/
ads->ds_ctl1 |= segLen | (lastSeg ? 0 : AR_More);
} else if (lastSeg) { /* !firstSeg && lastSeg */
/*
* Last descriptor in a multi-descriptor frame,
* copy the transmit parameters from the first
* frame for processing on completion.
*/
ads->ds_ctl0 = AR5211DESC_CONST(ds0)->ds_ctl0;
ads->ds_ctl1 = segLen;
} else { /* !firstSeg && !lastSeg */
/*
* Intermediate descriptor in a multi-descriptor frame.
*/
ads->ds_ctl0 = 0;
ads->ds_ctl1 = segLen | AR_More;
}
ads->ds_status0 = ads->ds_status1 = 0;
return AH_TRUE;
}
/*
* Processing of HW TX descriptor.
*/
HAL_STATUS
ar5211ProcTxDesc(struct ath_hal *ah,
struct ath_desc *ds, struct ath_tx_status *ts)
{
struct ar5211_desc *ads = AR5211DESC(ds);
if ((ads->ds_status1 & AR_Done) == 0)
return HAL_EINPROGRESS;
/* Update software copies of the HW status */
ts->ts_seqnum = MS(ads->ds_status1, AR_SeqNum);
ts->ts_tstamp = MS(ads->ds_status0, AR_SendTimestamp);
ts->ts_status = 0;
if ((ads->ds_status0 & AR_FrmXmitOK) == 0) {
if (ads->ds_status0 & AR_ExcessiveRetries)
ts->ts_status |= HAL_TXERR_XRETRY;
if (ads->ds_status0 & AR_Filtered)
ts->ts_status |= HAL_TXERR_FILT;
if (ads->ds_status0 & AR_FIFOUnderrun)
ts->ts_status |= HAL_TXERR_FIFO;
}
ts->ts_rate = MS(ads->ds_ctl0, AR_XmitRate);
ts->ts_rssi = MS(ads->ds_status1, AR_AckSigStrength);
ts->ts_shortretry = MS(ads->ds_status0, AR_ShortRetryCnt);
ts->ts_longretry = MS(ads->ds_status0, AR_LongRetryCnt);
ts->ts_virtcol = MS(ads->ds_status0, AR_VirtCollCnt);
ts->ts_antenna = 0; /* NB: don't know */
ts->ts_finaltsi = 0;
/*
* NB: the number of retries is one less than it should be.
* Also, 0 retries and 1 retry are both reported as 0 retries.
*/
if (ts->ts_shortretry > 0)
ts->ts_shortretry++;
if (ts->ts_longretry > 0)
ts->ts_longretry++;
return HAL_OK;
}
/*
* Determine which tx queues need interrupt servicing.
* STUB.
*/
void
ar5211GetTxIntrQueue(struct ath_hal *ah, uint32_t *txqs)
{
return;
}
/*
* Retrieve the rate table from the given TX completion descriptor
*/
HAL_BOOL
ar5211GetTxCompletionRates(struct ath_hal *ah, const struct ath_desc *ds0, int *rates, int *tries)
{
return AH_FALSE;
}