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linux/drivers/net/wireless/ath/ath9k/ar9003_mac.c

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/*
* Copyright (c) 2010-2011 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 <linux/export.h>
#include "hw.h"
#include "ar9003_mac.h"
#include "ar9003_mci.h"
static void ar9003_hw_rx_enable(struct ath_hw *hw)
{
REG_WRITE(hw, AR_CR, 0);
}
static void
ar9003_set_txdesc(struct ath_hw *ah, void *ds, struct ath_tx_info *i)
{
struct ar9003_txc *ads = ds;
int checksum = 0;
u32 val, ctl12, ctl17;
u8 desc_len;
desc_len = (AR_SREV_9462(ah) ? 0x18 : 0x17);
val = (ATHEROS_VENDOR_ID << AR_DescId_S) |
(1 << AR_TxRxDesc_S) |
(1 << AR_CtrlStat_S) |
(i->qcu << AR_TxQcuNum_S) | desc_len;
checksum += val;
ACCESS_ONCE(ads->info) = val;
checksum += i->link;
ACCESS_ONCE(ads->link) = i->link;
checksum += i->buf_addr[0];
ACCESS_ONCE(ads->data0) = i->buf_addr[0];
checksum += i->buf_addr[1];
ACCESS_ONCE(ads->data1) = i->buf_addr[1];
checksum += i->buf_addr[2];
ACCESS_ONCE(ads->data2) = i->buf_addr[2];
checksum += i->buf_addr[3];
ACCESS_ONCE(ads->data3) = i->buf_addr[3];
checksum += (val = (i->buf_len[0] << AR_BufLen_S) & AR_BufLen);
ACCESS_ONCE(ads->ctl3) = val;
checksum += (val = (i->buf_len[1] << AR_BufLen_S) & AR_BufLen);
ACCESS_ONCE(ads->ctl5) = val;
checksum += (val = (i->buf_len[2] << AR_BufLen_S) & AR_BufLen);
ACCESS_ONCE(ads->ctl7) = val;
checksum += (val = (i->buf_len[3] << AR_BufLen_S) & AR_BufLen);
ACCESS_ONCE(ads->ctl9) = val;
checksum = (u16) (((checksum & 0xffff) + (checksum >> 16)) & 0xffff);
ACCESS_ONCE(ads->ctl10) = checksum;
if (i->is_first || i->is_last) {
ACCESS_ONCE(ads->ctl13) = set11nTries(i->rates, 0)
| set11nTries(i->rates, 1)
| set11nTries(i->rates, 2)
| set11nTries(i->rates, 3)
| (i->dur_update ? AR_DurUpdateEna : 0)
| SM(0, AR_BurstDur);
ACCESS_ONCE(ads->ctl14) = set11nRate(i->rates, 0)
| set11nRate(i->rates, 1)
| set11nRate(i->rates, 2)
| set11nRate(i->rates, 3);
} else {
ACCESS_ONCE(ads->ctl13) = 0;
ACCESS_ONCE(ads->ctl14) = 0;
}
ads->ctl20 = 0;
ads->ctl21 = 0;
ads->ctl22 = 0;
ads->ctl23 = 0;
ctl17 = SM(i->keytype, AR_EncrType);
if (!i->is_first) {
ACCESS_ONCE(ads->ctl11) = 0;
ACCESS_ONCE(ads->ctl12) = i->is_last ? 0 : AR_TxMore;
ACCESS_ONCE(ads->ctl15) = 0;
ACCESS_ONCE(ads->ctl16) = 0;
ACCESS_ONCE(ads->ctl17) = ctl17;
ACCESS_ONCE(ads->ctl18) = 0;
ACCESS_ONCE(ads->ctl19) = 0;
return;
}
ACCESS_ONCE(ads->ctl11) = (i->pkt_len & AR_FrameLen)
| (i->flags & ATH9K_TXDESC_VMF ? AR_VirtMoreFrag : 0)
| SM(i->txpower, AR_XmitPower)
| (i->flags & ATH9K_TXDESC_VEOL ? AR_VEOL : 0)
| (i->keyix != ATH9K_TXKEYIX_INVALID ? AR_DestIdxValid : 0)
| (i->flags & ATH9K_TXDESC_LOWRXCHAIN ? AR_LowRxChain : 0)
| (i->flags & ATH9K_TXDESC_CLRDMASK ? AR_ClrDestMask : 0)
| (i->flags & ATH9K_TXDESC_RTSENA ? AR_RTSEnable :
(i->flags & ATH9K_TXDESC_CTSENA ? AR_CTSEnable : 0));
ctl12 = (i->keyix != ATH9K_TXKEYIX_INVALID ?
SM(i->keyix, AR_DestIdx) : 0)
| SM(i->type, AR_FrameType)
| (i->flags & ATH9K_TXDESC_NOACK ? AR_NoAck : 0)
| (i->flags & ATH9K_TXDESC_EXT_ONLY ? AR_ExtOnly : 0)
| (i->flags & ATH9K_TXDESC_EXT_AND_CTL ? AR_ExtAndCtl : 0);
ctl17 |= (i->flags & ATH9K_TXDESC_LDPC ? AR_LDPC : 0);
switch (i->aggr) {
case AGGR_BUF_FIRST:
ctl17 |= SM(i->aggr_len, AR_AggrLen);
/* fall through */
case AGGR_BUF_MIDDLE:
ctl12 |= AR_IsAggr | AR_MoreAggr;
ctl17 |= SM(i->ndelim, AR_PadDelim);
break;
case AGGR_BUF_LAST:
ctl12 |= AR_IsAggr;
break;
case AGGR_BUF_NONE:
break;
}
val = (i->flags & ATH9K_TXDESC_PAPRD) >> ATH9K_TXDESC_PAPRD_S;
ctl12 |= SM(val, AR_PAPRDChainMask);
ACCESS_ONCE(ads->ctl12) = ctl12;
ACCESS_ONCE(ads->ctl17) = ctl17;
ACCESS_ONCE(ads->ctl15) = set11nPktDurRTSCTS(i->rates, 0)
| set11nPktDurRTSCTS(i->rates, 1);
ACCESS_ONCE(ads->ctl16) = set11nPktDurRTSCTS(i->rates, 2)
| set11nPktDurRTSCTS(i->rates, 3);
ACCESS_ONCE(ads->ctl18) = set11nRateFlags(i->rates, 0)
| set11nRateFlags(i->rates, 1)
| set11nRateFlags(i->rates, 2)
| set11nRateFlags(i->rates, 3)
| SM(i->rtscts_rate, AR_RTSCTSRate);
ACCESS_ONCE(ads->ctl19) = AR_Not_Sounding;
}
static u16 ar9003_calc_ptr_chksum(struct ar9003_txc *ads)
{
int checksum;
checksum = ads->info + ads->link
+ ads->data0 + ads->ctl3
+ ads->data1 + ads->ctl5
+ ads->data2 + ads->ctl7
+ ads->data3 + ads->ctl9;
return ((checksum & 0xffff) + (checksum >> 16)) & AR_TxPtrChkSum;
}
static void ar9003_hw_set_desc_link(void *ds, u32 ds_link)
{
struct ar9003_txc *ads = ds;
ads->link = ds_link;
ads->ctl10 &= ~AR_TxPtrChkSum;
ads->ctl10 |= ar9003_calc_ptr_chksum(ads);
}
static bool ar9003_hw_get_isr(struct ath_hw *ah, enum ath9k_int *masked)
{
u32 isr = 0;
u32 mask2 = 0;
struct ath9k_hw_capabilities *pCap = &ah->caps;
struct ath_common *common = ath9k_hw_common(ah);
u32 sync_cause = 0, async_cause, async_mask = AR_INTR_MAC_IRQ;
if (ath9k_hw_mci_is_enabled(ah))
async_mask |= AR_INTR_ASYNC_MASK_MCI;
async_cause = REG_READ(ah, AR_INTR_ASYNC_CAUSE);
if (async_cause & async_mask) {
if ((REG_READ(ah, AR_RTC_STATUS) & AR_RTC_STATUS_M)
== AR_RTC_STATUS_ON)
isr = REG_READ(ah, AR_ISR);
}
sync_cause = REG_READ(ah, AR_INTR_SYNC_CAUSE) & AR_INTR_SYNC_DEFAULT;
*masked = 0;
if (!isr && !sync_cause && !async_cause)
return false;
if (isr) {
if (isr & AR_ISR_BCNMISC) {
u32 isr2;
isr2 = REG_READ(ah, AR_ISR_S2);
mask2 |= ((isr2 & AR_ISR_S2_TIM) >>
MAP_ISR_S2_TIM);
mask2 |= ((isr2 & AR_ISR_S2_DTIM) >>
MAP_ISR_S2_DTIM);
mask2 |= ((isr2 & AR_ISR_S2_DTIMSYNC) >>
MAP_ISR_S2_DTIMSYNC);
mask2 |= ((isr2 & AR_ISR_S2_CABEND) >>
MAP_ISR_S2_CABEND);
mask2 |= ((isr2 & AR_ISR_S2_GTT) <<
MAP_ISR_S2_GTT);
mask2 |= ((isr2 & AR_ISR_S2_CST) <<
MAP_ISR_S2_CST);
mask2 |= ((isr2 & AR_ISR_S2_TSFOOR) >>
MAP_ISR_S2_TSFOOR);
mask2 |= ((isr2 & AR_ISR_S2_BB_WATCHDOG) >>
MAP_ISR_S2_BB_WATCHDOG);
if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) {
REG_WRITE(ah, AR_ISR_S2, isr2);
isr &= ~AR_ISR_BCNMISC;
}
}
if ((pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED))
isr = REG_READ(ah, AR_ISR_RAC);
if (isr == 0xffffffff) {
*masked = 0;
return false;
}
*masked = isr & ATH9K_INT_COMMON;
if (ah->config.rx_intr_mitigation)
if (isr & (AR_ISR_RXMINTR | AR_ISR_RXINTM))
*masked |= ATH9K_INT_RXLP;
if (ah->config.tx_intr_mitigation)
if (isr & (AR_ISR_TXMINTR | AR_ISR_TXINTM))
*masked |= ATH9K_INT_TX;
if (isr & (AR_ISR_LP_RXOK | AR_ISR_RXERR))
*masked |= ATH9K_INT_RXLP;
if (isr & AR_ISR_HP_RXOK)
*masked |= ATH9K_INT_RXHP;
if (isr & (AR_ISR_TXOK | AR_ISR_TXERR | AR_ISR_TXEOL)) {
*masked |= ATH9K_INT_TX;
if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) {
u32 s0, s1;
s0 = REG_READ(ah, AR_ISR_S0);
REG_WRITE(ah, AR_ISR_S0, s0);
s1 = REG_READ(ah, AR_ISR_S1);
REG_WRITE(ah, AR_ISR_S1, s1);
isr &= ~(AR_ISR_TXOK | AR_ISR_TXERR |
AR_ISR_TXEOL);
}
}
if (isr & AR_ISR_GENTMR) {
u32 s5;
if (pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)
s5 = REG_READ(ah, AR_ISR_S5_S);
else
s5 = REG_READ(ah, AR_ISR_S5);
ah->intr_gen_timer_trigger =
MS(s5, AR_ISR_S5_GENTIMER_TRIG);
ah->intr_gen_timer_thresh =
MS(s5, AR_ISR_S5_GENTIMER_THRESH);
if (ah->intr_gen_timer_trigger)
*masked |= ATH9K_INT_GENTIMER;
if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) {
REG_WRITE(ah, AR_ISR_S5, s5);
isr &= ~AR_ISR_GENTMR;
}
}
*masked |= mask2;
if (!(pCap->hw_caps & ATH9K_HW_CAP_RAC_SUPPORTED)) {
REG_WRITE(ah, AR_ISR, isr);
(void) REG_READ(ah, AR_ISR);
}
if (*masked & ATH9K_INT_BB_WATCHDOG)
ar9003_hw_bb_watchdog_read(ah);
}
if (async_cause & AR_INTR_ASYNC_MASK_MCI)
ar9003_mci_get_isr(ah, masked);
if (sync_cause) {
ath9k_debug_sync_cause(common, sync_cause);
if (sync_cause & AR_INTR_SYNC_RADM_CPL_TIMEOUT) {
REG_WRITE(ah, AR_RC, AR_RC_HOSTIF);
REG_WRITE(ah, AR_RC, 0);
*masked |= ATH9K_INT_FATAL;
}
if (sync_cause & AR_INTR_SYNC_LOCAL_TIMEOUT)
ath_dbg(common, INTERRUPT,
"AR_INTR_SYNC_LOCAL_TIMEOUT\n");
REG_WRITE(ah, AR_INTR_SYNC_CAUSE_CLR, sync_cause);
(void) REG_READ(ah, AR_INTR_SYNC_CAUSE_CLR);
}
return true;
}
static int ar9003_hw_proc_txdesc(struct ath_hw *ah, void *ds,
struct ath_tx_status *ts)
{
struct ar9003_txs *ads;
u32 status;
ads = &ah->ts_ring[ah->ts_tail];
status = ACCESS_ONCE(ads->status8);
if ((status & AR_TxDone) == 0)
return -EINPROGRESS;
ah->ts_tail = (ah->ts_tail + 1) % ah->ts_size;
if ((MS(ads->ds_info, AR_DescId) != ATHEROS_VENDOR_ID) ||
(MS(ads->ds_info, AR_TxRxDesc) != 1)) {
ath_dbg(ath9k_hw_common(ah), XMIT,
"Tx Descriptor error %x\n", ads->ds_info);
memset(ads, 0, sizeof(*ads));
return -EIO;
}
ts->ts_rateindex = MS(status, AR_FinalTxIdx);
ts->ts_seqnum = MS(status, AR_SeqNum);
ts->tid = MS(status, AR_TxTid);
ts->qid = MS(ads->ds_info, AR_TxQcuNum);
ts->desc_id = MS(ads->status1, AR_TxDescId);
ts->ts_tstamp = ads->status4;
ts->ts_status = 0;
ts->ts_flags = 0;
if (status & AR_TxOpExceeded)
ts->ts_status |= ATH9K_TXERR_XTXOP;
status = ACCESS_ONCE(ads->status2);
ts->ts_rssi_ctl0 = MS(status, AR_TxRSSIAnt00);
ts->ts_rssi_ctl1 = MS(status, AR_TxRSSIAnt01);
ts->ts_rssi_ctl2 = MS(status, AR_TxRSSIAnt02);
if (status & AR_TxBaStatus) {
ts->ts_flags |= ATH9K_TX_BA;
ts->ba_low = ads->status5;
ts->ba_high = ads->status6;
}
status = ACCESS_ONCE(ads->status3);
if (status & AR_ExcessiveRetries)
ts->ts_status |= ATH9K_TXERR_XRETRY;
if (status & AR_Filtered)
ts->ts_status |= ATH9K_TXERR_FILT;
if (status & AR_FIFOUnderrun) {
ts->ts_status |= ATH9K_TXERR_FIFO;
ath9k_hw_updatetxtriglevel(ah, true);
}
if (status & AR_TxTimerExpired)
ts->ts_status |= ATH9K_TXERR_TIMER_EXPIRED;
if (status & AR_DescCfgErr)
ts->ts_flags |= ATH9K_TX_DESC_CFG_ERR;
if (status & AR_TxDataUnderrun) {
ts->ts_flags |= ATH9K_TX_DATA_UNDERRUN;
ath9k_hw_updatetxtriglevel(ah, true);
}
if (status & AR_TxDelimUnderrun) {
ts->ts_flags |= ATH9K_TX_DELIM_UNDERRUN;
ath9k_hw_updatetxtriglevel(ah, true);
}
ts->ts_shortretry = MS(status, AR_RTSFailCnt);
ts->ts_longretry = MS(status, AR_DataFailCnt);
ts->ts_virtcol = MS(status, AR_VirtRetryCnt);
status = ACCESS_ONCE(ads->status7);
ts->ts_rssi = MS(status, AR_TxRSSICombined);
ts->ts_rssi_ext0 = MS(status, AR_TxRSSIAnt10);
ts->ts_rssi_ext1 = MS(status, AR_TxRSSIAnt11);
ts->ts_rssi_ext2 = MS(status, AR_TxRSSIAnt12);
memset(ads, 0, sizeof(*ads));
return 0;
}
void ar9003_hw_attach_mac_ops(struct ath_hw *hw)
{
struct ath_hw_ops *ops = ath9k_hw_ops(hw);
ops->rx_enable = ar9003_hw_rx_enable;
ops->set_desc_link = ar9003_hw_set_desc_link;
ops->get_isr = ar9003_hw_get_isr;
ops->set_txdesc = ar9003_set_txdesc;
ops->proc_txdesc = ar9003_hw_proc_txdesc;
}
void ath9k_hw_set_rx_bufsize(struct ath_hw *ah, u16 buf_size)
{
REG_WRITE(ah, AR_DATABUF_SIZE, buf_size & AR_DATABUF_SIZE_MASK);
}
EXPORT_SYMBOL(ath9k_hw_set_rx_bufsize);
void ath9k_hw_addrxbuf_edma(struct ath_hw *ah, u32 rxdp,
enum ath9k_rx_qtype qtype)
{
if (qtype == ATH9K_RX_QUEUE_HP)
REG_WRITE(ah, AR_HP_RXDP, rxdp);
else
REG_WRITE(ah, AR_LP_RXDP, rxdp);
}
EXPORT_SYMBOL(ath9k_hw_addrxbuf_edma);
int ath9k_hw_process_rxdesc_edma(struct ath_hw *ah, struct ath_rx_status *rxs,
void *buf_addr)
{
struct ar9003_rxs *rxsp = (struct ar9003_rxs *) buf_addr;
unsigned int phyerr;
if ((rxsp->status11 & AR_RxDone) == 0)
return -EINPROGRESS;
if (MS(rxsp->ds_info, AR_DescId) != 0x168c)
return -EINVAL;
if ((rxsp->ds_info & (AR_TxRxDesc | AR_CtrlStat)) != 0)
return -EINPROGRESS;
rxs->rs_status = 0;
rxs->rs_flags = 0;
rxs->rs_datalen = rxsp->status2 & AR_DataLen;
rxs->rs_tstamp = rxsp->status3;
/* XXX: Keycache */
rxs->rs_rssi = MS(rxsp->status5, AR_RxRSSICombined);
rxs->rs_rssi_ctl0 = MS(rxsp->status1, AR_RxRSSIAnt00);
rxs->rs_rssi_ctl1 = MS(rxsp->status1, AR_RxRSSIAnt01);
rxs->rs_rssi_ctl2 = MS(rxsp->status1, AR_RxRSSIAnt02);
rxs->rs_rssi_ext0 = MS(rxsp->status5, AR_RxRSSIAnt10);
rxs->rs_rssi_ext1 = MS(rxsp->status5, AR_RxRSSIAnt11);
rxs->rs_rssi_ext2 = MS(rxsp->status5, AR_RxRSSIAnt12);
if (rxsp->status11 & AR_RxKeyIdxValid)
rxs->rs_keyix = MS(rxsp->status11, AR_KeyIdx);
else
rxs->rs_keyix = ATH9K_RXKEYIX_INVALID;
rxs->rs_rate = MS(rxsp->status1, AR_RxRate);
rxs->rs_more = (rxsp->status2 & AR_RxMore) ? 1 : 0;
rxs->rs_isaggr = (rxsp->status11 & AR_RxAggr) ? 1 : 0;
rxs->rs_moreaggr = (rxsp->status11 & AR_RxMoreAggr) ? 1 : 0;
rxs->rs_antenna = (MS(rxsp->status4, AR_RxAntenna) & 0x7);
rxs->rs_flags = (rxsp->status4 & AR_GI) ? ATH9K_RX_GI : 0;
rxs->rs_flags |= (rxsp->status4 & AR_2040) ? ATH9K_RX_2040 : 0;
rxs->evm0 = rxsp->status6;
rxs->evm1 = rxsp->status7;
rxs->evm2 = rxsp->status8;
rxs->evm3 = rxsp->status9;
rxs->evm4 = (rxsp->status10 & 0xffff);
if (rxsp->status11 & AR_PreDelimCRCErr)
rxs->rs_flags |= ATH9K_RX_DELIM_CRC_PRE;
if (rxsp->status11 & AR_PostDelimCRCErr)
rxs->rs_flags |= ATH9K_RX_DELIM_CRC_POST;
if (rxsp->status11 & AR_DecryptBusyErr)
rxs->rs_flags |= ATH9K_RX_DECRYPT_BUSY;
if ((rxsp->status11 & AR_RxFrameOK) == 0) {
/*
* AR_CRCErr will bet set to true if we're on the last
* subframe and the AR_PostDelimCRCErr is caught.
* In a way this also gives us a guarantee that when
* (!(AR_CRCErr) && (AR_PostDelimCRCErr)) we cannot
* possibly be reviewing the last subframe. AR_CRCErr
* is the CRC of the actual data.
*/
if (rxsp->status11 & AR_CRCErr)
rxs->rs_status |= ATH9K_RXERR_CRC;
else if (rxsp->status11 & AR_DecryptCRCErr)
rxs->rs_status |= ATH9K_RXERR_DECRYPT;
else if (rxsp->status11 & AR_MichaelErr)
rxs->rs_status |= ATH9K_RXERR_MIC;
if (rxsp->status11 & AR_PHYErr) {
phyerr = MS(rxsp->status11, AR_PHYErrCode);
/*
* If we reach a point here where AR_PostDelimCRCErr is
* true it implies we're *not* on the last subframe. In
* in that case that we know already that the CRC of
* the frame was OK, and MAC would send an ACK for that
* subframe, even if we did get a phy error of type
* ATH9K_PHYERR_OFDM_RESTART. This is only applicable
* to frame that are prior to the last subframe.
* The AR_PostDelimCRCErr is the CRC for the MPDU
* delimiter, which contains the 4 reserved bits,
* the MPDU length (12 bits), and follows the MPDU
* delimiter for an A-MPDU subframe (0x4E = 'N' ASCII).
*/
if ((phyerr == ATH9K_PHYERR_OFDM_RESTART) &&
(rxsp->status11 & AR_PostDelimCRCErr)) {
rxs->rs_phyerr = 0;
} else {
rxs->rs_status |= ATH9K_RXERR_PHY;
rxs->rs_phyerr = phyerr;
}
};
}
if (rxsp->status11 & AR_KeyMiss)
rxs->rs_status |= ATH9K_RXERR_KEYMISS;
return 0;
}
EXPORT_SYMBOL(ath9k_hw_process_rxdesc_edma);
void ath9k_hw_reset_txstatus_ring(struct ath_hw *ah)
{
ah->ts_tail = 0;
memset((void *) ah->ts_ring, 0,
ah->ts_size * sizeof(struct ar9003_txs));
ath_dbg(ath9k_hw_common(ah), XMIT,
"TS Start 0x%x End 0x%x Virt %p, Size %d\n",
ah->ts_paddr_start, ah->ts_paddr_end,
ah->ts_ring, ah->ts_size);
REG_WRITE(ah, AR_Q_STATUS_RING_START, ah->ts_paddr_start);
REG_WRITE(ah, AR_Q_STATUS_RING_END, ah->ts_paddr_end);
}
void ath9k_hw_setup_statusring(struct ath_hw *ah, void *ts_start,
u32 ts_paddr_start,
u16 size)
{
ah->ts_paddr_start = ts_paddr_start;
ah->ts_paddr_end = ts_paddr_start + (size * sizeof(struct ar9003_txs));
ah->ts_size = size;
ah->ts_ring = (struct ar9003_txs *) ts_start;
ath9k_hw_reset_txstatus_ring(ah);
}
EXPORT_SYMBOL(ath9k_hw_setup_statusring);
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