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kernel-ark/drivers/net/wireless/ath/ath9k/ar9003_mac.c
Senthil Balasubramanian 6ee63f55c7 ath9k_hw: Fix low throughput issue with AR93xx 
TX underruns were noticed when RTS/CTS preceded aggregates.
This issue was noticed in ar93xx family of chipsets only.
The workaround involves padding the RTS or CTS length up
to the min packet length of 256 bytes required by the
hardware by adding delimiters to the fist descriptor of
the aggregate.

Signed-off-by: Senthil Balasubramanian <senthilkumar@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2010-11-16 16:37:07 -05:00

683 lines
18 KiB
C
Raw Blame History

/*
* 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 "hw.h"
#include "ar9003_mac.h"
static void ar9003_hw_rx_enable(struct ath_hw *hw)
{
REG_WRITE(hw, AR_CR, 0);
}
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 void ar9003_hw_get_desc_link(void *ds, u32 **ds_link)
{
struct ar9003_txc *ads = ds;
*ds_link = &ads->link;
}
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;
u32 sync_cause = 0;
struct ath_common *common = ath9k_hw_common(ah);
if (REG_READ(ah, AR_INTR_ASYNC_CAUSE) & AR_INTR_MAC_IRQ) {
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)
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 (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_print(common, ATH_DBG_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 void ar9003_hw_fill_txdesc(struct ath_hw *ah, void *ds, u32 seglen,
bool is_firstseg, bool is_lastseg,
const void *ds0, dma_addr_t buf_addr,
unsigned int qcu)
{
struct ar9003_txc *ads = (struct ar9003_txc *) ds;
unsigned int descid = 0;
ads->info = (ATHEROS_VENDOR_ID << AR_DescId_S) |
(1 << AR_TxRxDesc_S) |
(1 << AR_CtrlStat_S) |
(qcu << AR_TxQcuNum_S) | 0x17;
ads->data0 = buf_addr;
ads->data1 = 0;
ads->data2 = 0;
ads->data3 = 0;
ads->ctl3 = (seglen << AR_BufLen_S);
ads->ctl3 &= AR_BufLen;
/* Fill in pointer checksum and descriptor id */
ads->ctl10 = ar9003_calc_ptr_chksum(ads);
ads->ctl10 |= (descid << AR_TxDescId_S);
if (is_firstseg) {
ads->ctl12 |= (is_lastseg ? 0 : AR_TxMore);
} else if (is_lastseg) {
ads->ctl11 = 0;
ads->ctl12 = 0;
ads->ctl13 = AR9003TXC_CONST(ds0)->ctl13;
ads->ctl14 = AR9003TXC_CONST(ds0)->ctl14;
} else {
/* XXX Intermediate descriptor in a multi-descriptor frame.*/
ads->ctl11 = 0;
ads->ctl12 = AR_TxMore;
ads->ctl13 = 0;
ads->ctl14 = 0;
}
}
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_print(ath9k_hw_common(ah), ATH_DBG_XMIT,
"Tx Descriptor error %x\n", ads->ds_info);
memset(ads, 0, sizeof(*ads));
return -EIO;
}
if (status & AR_TxOpExceeded)
ts->ts_status |= ATH9K_TXERR_XTXOP;
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;
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;
}
static void ar9003_hw_set11n_txdesc(struct ath_hw *ah, void *ds,
u32 pktlen, enum ath9k_pkt_type type, u32 txpower,
u32 keyIx, enum ath9k_key_type keyType, u32 flags)
{
struct ar9003_txc *ads = (struct ar9003_txc *) ds;
if (txpower > ah->txpower_limit)
txpower = ah->txpower_limit;
txpower += ah->txpower_indexoffset;
if (txpower > 63)
txpower = 63;
ads->ctl11 = (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)
| (keyIx != ATH9K_TXKEYIX_INVALID ? AR_DestIdxValid : 0)
| (flags & ATH9K_TXDESC_LOWRXCHAIN ? AR_LowRxChain : 0);
ads->ctl12 =
(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->ctl17 = SM(keyType, AR_EncrType) |
(flags & ATH9K_TXDESC_LDPC ? AR_LDPC : 0);
ads->ctl18 = 0;
ads->ctl19 = AR_Not_Sounding;
ads->ctl20 = 0;
ads->ctl21 = 0;
ads->ctl22 = 0;
}
static void ar9003_hw_set11n_ratescenario(struct ath_hw *ah, void *ds,
void *lastds,
u32 durUpdateEn, u32 rtsctsRate,
u32 rtsctsDuration,
struct ath9k_11n_rate_series series[],
u32 nseries, u32 flags)
{
struct ar9003_txc *ads = (struct ar9003_txc *) ds;
struct ar9003_txc *last_ads = (struct ar9003_txc *) lastds;
u_int32_t ctl11;
if (flags & (ATH9K_TXDESC_RTSENA | ATH9K_TXDESC_CTSENA)) {
ctl11 = ads->ctl11;
if (flags & ATH9K_TXDESC_RTSENA) {
ctl11 &= ~AR_CTSEnable;
ctl11 |= AR_RTSEnable;
} else {
ctl11 &= ~AR_RTSEnable;
ctl11 |= AR_CTSEnable;
}
ads->ctl11 = ctl11;
} else {
ads->ctl11 = (ads->ctl11 & ~(AR_RTSEnable | AR_CTSEnable));
}
ads->ctl13 = set11nTries(series, 0)
| set11nTries(series, 1)
| set11nTries(series, 2)
| set11nTries(series, 3)
| (durUpdateEn ? AR_DurUpdateEna : 0)
| SM(0, AR_BurstDur);
ads->ctl14 = set11nRate(series, 0)
| set11nRate(series, 1)
| set11nRate(series, 2)
| set11nRate(series, 3);
ads->ctl15 = set11nPktDurRTSCTS(series, 0)
| set11nPktDurRTSCTS(series, 1);
ads->ctl16 = set11nPktDurRTSCTS(series, 2)
| set11nPktDurRTSCTS(series, 3);
ads->ctl18 = set11nRateFlags(series, 0)
| set11nRateFlags(series, 1)
| set11nRateFlags(series, 2)
| set11nRateFlags(series, 3)
| SM(rtsctsRate, AR_RTSCTSRate);
ads->ctl19 = AR_Not_Sounding;
last_ads->ctl13 = ads->ctl13;
last_ads->ctl14 = ads->ctl14;
}
static void ar9003_hw_set11n_aggr_first(struct ath_hw *ah, void *ds,
u32 aggrLen)
{
#define FIRST_DESC_NDELIMS 60
struct ar9003_txc *ads = (struct ar9003_txc *) ds;
ads->ctl12 |= (AR_IsAggr | AR_MoreAggr);
if (ah->ent_mode & AR_ENT_OTP_MPSD) {
u32 ctl17, ndelim;
/*
* Add delimiter when using RTS/CTS with aggregation
* and non enterprise AR9003 card
*/
ctl17 = ads->ctl17;
ndelim = MS(ctl17, AR_PadDelim);
if (ndelim < FIRST_DESC_NDELIMS) {
aggrLen += (FIRST_DESC_NDELIMS - ndelim) * 4;
ndelim = FIRST_DESC_NDELIMS;
}
ctl17 &= ~AR_AggrLen;
ctl17 |= SM(aggrLen, AR_AggrLen);
ctl17 &= ~AR_PadDelim;
ctl17 |= SM(ndelim, AR_PadDelim);
ads->ctl17 = ctl17;
} else {
ads->ctl17 &= ~AR_AggrLen;
ads->ctl17 |= SM(aggrLen, AR_AggrLen);
}
}
static void ar9003_hw_set11n_aggr_middle(struct ath_hw *ah, void *ds,
u32 numDelims)
{
struct ar9003_txc *ads = (struct ar9003_txc *) ds;
unsigned int ctl17;
ads->ctl12 |= (AR_IsAggr | AR_MoreAggr);
/*
* We use a stack variable to manipulate ctl6 to reduce uncached
* read modify, modfiy, write.
*/
ctl17 = ads->ctl17;
ctl17 &= ~AR_PadDelim;
ctl17 |= SM(numDelims, AR_PadDelim);
ads->ctl17 = ctl17;
}
static void ar9003_hw_set11n_aggr_last(struct ath_hw *ah, void *ds)
{
struct ar9003_txc *ads = (struct ar9003_txc *) ds;
ads->ctl12 |= AR_IsAggr;
ads->ctl12 &= ~AR_MoreAggr;
ads->ctl17 &= ~AR_PadDelim;
}
static void ar9003_hw_clr11n_aggr(struct ath_hw *ah, void *ds)
{
struct ar9003_txc *ads = (struct ar9003_txc *) ds;
ads->ctl12 &= (~AR_IsAggr & ~AR_MoreAggr);
}
static void ar9003_hw_set11n_burstduration(struct ath_hw *ah, void *ds,
u32 burstDuration)
{
struct ar9003_txc *ads = (struct ar9003_txc *) ds;
ads->ctl13 &= ~AR_BurstDur;
ads->ctl13 |= SM(burstDuration, AR_BurstDur);
}
static void ar9003_hw_set11n_virtualmorefrag(struct ath_hw *ah, void *ds,
u32 vmf)
{
struct ar9003_txc *ads = (struct ar9003_txc *) ds;
if (vmf)
ads->ctl11 |= AR_VirtMoreFrag;
else
ads->ctl11 &= ~AR_VirtMoreFrag;
}
void ar9003_hw_set_paprd_txdesc(struct ath_hw *ah, void *ds, u8 chains)
{
struct ar9003_txc *ads = ds;
ads->ctl12 |= SM(chains, AR_PAPRDChainMask);
}
EXPORT_SYMBOL(ar9003_hw_set_paprd_txdesc);
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_desc_link = ar9003_hw_get_desc_link;
ops->get_isr = ar9003_hw_get_isr;
ops->fill_txdesc = ar9003_hw_fill_txdesc;
ops->proc_txdesc = ar9003_hw_proc_txdesc;
ops->set11n_txdesc = ar9003_hw_set11n_txdesc;
ops->set11n_ratescenario = ar9003_hw_set11n_ratescenario;
ops->set11n_aggr_first = ar9003_hw_set11n_aggr_first;
ops->set11n_aggr_middle = ar9003_hw_set11n_aggr_middle;
ops->set11n_aggr_last = ar9003_hw_set11n_aggr_last;
ops->clr11n_aggr = ar9003_hw_clr11n_aggr;
ops->set11n_burstduration = ar9003_hw_set11n_burstduration;
ops->set11n_virtualmorefrag = ar9003_hw_set11n_virtualmorefrag;
}
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;
/* TODO: byte swap on big endian for ar9300_10 */
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;
if (!rxs)
return 0;
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_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;
}
} else if (rxsp->status11 & AR_DecryptCRCErr) {
rxs->rs_status |= ATH9K_RXERR_DECRYPT;
} else if (rxsp->status11 & AR_MichaelErr) {
rxs->rs_status |= ATH9K_RXERR_MIC;
} else if (rxsp->status11 & AR_KeyMiss)
rxs->rs_status |= ATH9K_RXERR_DECRYPT;
}
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_print(ath9k_hw_common(ah), ATH_DBG_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,
u8 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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