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linux/drivers/net/wireless/ath/ath9k/ar9003_mac.c
Felix Fietkau 7a532fe713 ath9k_hw: fix interpretation of the rx KeyMiss flag 
Documentation states that the KeyMiss flag is only valid if RxFrameOK is
unset, however empirical evidence has shown that this is false.
When KeyMiss is set (and RxFrameOK is 1), the hardware passes a valid frame
which has not been decrypted. The driver then falsely marks the frame
as decrypted, and when using CCMP this corrupts the rx CCMP PN, leading
to connection hangs.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Cc: stable@kernel.org
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-01-16 15:01:15 -05:00

597 lines
17 KiB
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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"
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;
val = (ATHEROS_VENDOR_ID << AR_DescId_S) |
(1 << AR_TxRxDesc_S) |
(1 << AR_CtrlStat_S) |
(i->qcu << AR_TxQcuNum_S) | 0x17;
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;
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);
struct ath9k_hw_mci *mci = &ah->btcoex_hw.mci;
u32 sync_cause = 0, async_cause;
async_cause = REG_READ(ah, AR_INTR_ASYNC_CAUSE);
if (async_cause & (AR_INTR_MAC_IRQ | AR_INTR_ASYNC_MASK_MCI)) {
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) {
u32 raw_intr, rx_msg_intr;
rx_msg_intr = REG_READ(ah, AR_MCI_INTERRUPT_RX_MSG_RAW);
raw_intr = REG_READ(ah, AR_MCI_INTERRUPT_RAW);
if ((raw_intr == 0xdeadbeef) || (rx_msg_intr == 0xdeadbeef))
ath_dbg(common, MCI,
"MCI gets 0xdeadbeef during MCI int processing new raw_intr=0x%08x, new rx_msg_raw=0x%08x, raw_intr=0x%08x, rx_msg_raw=0x%08x\n",
raw_intr, rx_msg_intr, mci->raw_intr,
mci->rx_msg_intr);
else {
mci->rx_msg_intr |= rx_msg_intr;
mci->raw_intr |= raw_intr;
*masked |= ATH9K_INT_MCI;
if (rx_msg_intr & AR_MCI_INTERRUPT_RX_MSG_CONT_INFO)
mci->cont_status =
REG_READ(ah, AR_MCI_CONT_STATUS);
REG_WRITE(ah, AR_MCI_INTERRUPT_RX_MSG_RAW, rx_msg_intr);
REG_WRITE(ah, AR_MCI_INTERRUPT_RAW, raw_intr);
ath_dbg(common, MCI, "AR_INTR_SYNC_MCI\n");
}
}
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_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_txc *txc = (struct ar9003_txc *) ds;
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;
ts->qid = MS(ads->ds_info, AR_TxQcuNum);
if (!txc || (MS(txc->info, AR_TxQcuNum) == ts->qid))
ah->ts_tail = (ah->ts_tail + 1) % ah->ts_size;
else
return -ENOENT;
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->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;
/* TODO: byte swap on big endian for ar9300_10 */
if (!rxs) {
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;
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;
}
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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