ar5211_xmit.c

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/*-
 * SPDX-License-Identifier: ISC
 *
 * 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.
 *
 * $FreeBSD$
 */
#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,
        HAL_DMA_ADDR *bufAddrList, uint32_t *segLenList, u_int qcuId,
        u_int descId, HAL_BOOL firstSeg, HAL_BOOL lastSeg,
        const struct ath_desc *ds0)
{
        struct ar5211_desc *ads = AR5211DESC(ds);
        uint32_t segLen = segLenList[0];
 
        ds->ds_data = bufAddrList[0];
 
        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;
}
 
void
ar5211SetTxDescLink(struct ath_hal *ah, void *ds, uint32_t link)
{
        struct ar5211_desc *ads = AR5211DESC(ds);
 
        ads->ds_link = link;
}
 
void
ar5211GetTxDescLink(struct ath_hal *ah, void *ds, uint32_t *link)
{
        struct ar5211_desc *ads = AR5211DESC(ds);
 
        *link = ads->ds_link;
}
 
void
ar5211GetTxDescLinkPtr(struct ath_hal *ah, void *ds, uint32_t **linkptr)
{
        struct ar5211_desc *ads = AR5211DESC(ds);
 
        *linkptr = &ads->ds_link;
}