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linux/drivers/net/wireless/ath/ath9k/ar9002_mac.c
Felix Fietkau aebc0a88dd ath9k_hw: clean up ath9k_hw_setuprxdesc 
The ATH9K_HW_CAP_AUTOSLEEP check is bogus, the rx status area needs to be
cleared on all non-EDMA PCI/AHB based chipsets anyway.
Limit the memset to the rx status area to improve performance.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-03-15 13:45:04 -04:00

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/*
* Copyright (c) 2008-2011 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 "hw.h"
#include <linux/export.h>
#define AR_BufLen 0x00000fff
static void ar9002_hw_rx_enable(struct ath_hw *ah)
{
REG_WRITE(ah, AR_CR, AR_CR_RXE);
}
static void ar9002_hw_set_desc_link(void *ds, u32 ds_link)
{
((struct ath_desc*) ds)->ds_link = ds_link;
}
static bool ar9002_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;
bool fatal_int = false;
struct ath_common *common = ath9k_hw_common(ah);
if (!AR_SREV_9100(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;
} else {
*masked = 0;
isr = REG_READ(ah, AR_ISR);
}
if (isr) {
if (isr & AR_ISR_BCNMISC) {
u32 isr2;
isr2 = REG_READ(ah, AR_ISR_S2);
if (isr2 & AR_ISR_S2_TIM)
mask2 |= ATH9K_INT_TIM;
if (isr2 & AR_ISR_S2_DTIM)
mask2 |= ATH9K_INT_DTIM;
if (isr2 & AR_ISR_S2_DTIMSYNC)
mask2 |= ATH9K_INT_DTIMSYNC;
if (isr2 & (AR_ISR_S2_CABEND))
mask2 |= ATH9K_INT_CABEND;
if (isr2 & AR_ISR_S2_GTT)
mask2 |= ATH9K_INT_GTT;
if (isr2 & AR_ISR_S2_CST)
mask2 |= ATH9K_INT_CST;
if (isr2 & AR_ISR_S2_TSFOOR)
mask2 |= ATH9K_INT_TSFOOR;
}
isr = REG_READ(ah, AR_ISR_RAC);
if (isr == 0xffffffff) {
*masked = 0;
return false;
}
*masked = isr & ATH9K_INT_COMMON;
if (isr & (AR_ISR_RXMINTR | AR_ISR_RXINTM |
AR_ISR_RXOK | AR_ISR_RXERR))
*masked |= ATH9K_INT_RX;
if (isr &
(AR_ISR_TXOK | AR_ISR_TXDESC | AR_ISR_TXERR |
AR_ISR_TXEOL)) {
u32 s0_s, s1_s;
*masked |= ATH9K_INT_TX;
s0_s = REG_READ(ah, AR_ISR_S0_S);
ah->intr_txqs |= MS(s0_s, AR_ISR_S0_QCU_TXOK);
ah->intr_txqs |= MS(s0_s, AR_ISR_S0_QCU_TXDESC);
s1_s = REG_READ(ah, AR_ISR_S1_S);
ah->intr_txqs |= MS(s1_s, AR_ISR_S1_QCU_TXERR);
ah->intr_txqs |= MS(s1_s, AR_ISR_S1_QCU_TXEOL);
}
if (isr & AR_ISR_RXORN) {
ath_dbg(common, INTERRUPT,
"receive FIFO overrun interrupt\n");
}
*masked |= mask2;
}
if (AR_SREV_9100(ah))
return true;
if (isr & AR_ISR_GENTMR) {
u32 s5_s;
s5_s = REG_READ(ah, AR_ISR_S5_S);
ah->intr_gen_timer_trigger =
MS(s5_s, AR_ISR_S5_GENTIMER_TRIG);
ah->intr_gen_timer_thresh =
MS(s5_s, AR_ISR_S5_GENTIMER_THRESH);
if (ah->intr_gen_timer_trigger)
*masked |= ATH9K_INT_GENTIMER;
if ((s5_s & AR_ISR_S5_TIM_TIMER) &&
!(pCap->hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
*masked |= ATH9K_INT_TIM_TIMER;
}
if (sync_cause) {
fatal_int =
(sync_cause &
(AR_INTR_SYNC_HOST1_FATAL | AR_INTR_SYNC_HOST1_PERR))
? true : false;
if (fatal_int) {
if (sync_cause & AR_INTR_SYNC_HOST1_FATAL) {
ath_dbg(common, ANY,
"received PCI FATAL interrupt\n");
}
if (sync_cause & AR_INTR_SYNC_HOST1_PERR) {
ath_dbg(common, ANY,
"received PCI PERR interrupt\n");
}
*masked |= ATH9K_INT_FATAL;
}
if (sync_cause & AR_INTR_SYNC_RADM_CPL_TIMEOUT) {
ath_dbg(common, INTERRUPT,
"AR_INTR_SYNC_RADM_CPL_TIMEOUT\n");
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 void
ar9002_set_txdesc(struct ath_hw *ah, void *ds, struct ath_tx_info *i)
{
struct ar5416_desc *ads = AR5416DESC(ds);
u32 ctl1, ctl6;
ads->ds_txstatus0 = ads->ds_txstatus1 = 0;
ads->ds_txstatus2 = ads->ds_txstatus3 = 0;
ads->ds_txstatus4 = ads->ds_txstatus5 = 0;
ads->ds_txstatus6 = ads->ds_txstatus7 = 0;
ads->ds_txstatus8 = ads->ds_txstatus9 = 0;
ACCESS_ONCE(ads->ds_link) = i->link;
ACCESS_ONCE(ads->ds_data) = i->buf_addr[0];
ctl1 = i->buf_len[0] | (i->is_last ? 0 : AR_TxMore);
ctl6 = SM(i->keytype, AR_EncrType);
if (AR_SREV_9285(ah)) {
ads->ds_ctl8 = 0;
ads->ds_ctl9 = 0;
ads->ds_ctl10 = 0;
ads->ds_ctl11 = 0;
}
if ((i->is_first || i->is_last) &&
i->aggr != AGGR_BUF_MIDDLE && i->aggr != AGGR_BUF_LAST) {
ACCESS_ONCE(ads->ds_ctl2) = 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->ds_ctl3) = set11nRate(i->rates, 0)
| set11nRate(i->rates, 1)
| set11nRate(i->rates, 2)
| set11nRate(i->rates, 3);
} else {
ACCESS_ONCE(ads->ds_ctl2) = 0;
ACCESS_ONCE(ads->ds_ctl3) = 0;
}
if (!i->is_first) {
ACCESS_ONCE(ads->ds_ctl0) = 0;
ACCESS_ONCE(ads->ds_ctl1) = ctl1;
ACCESS_ONCE(ads->ds_ctl6) = ctl6;
return;
}
ctl1 |= (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);
switch (i->aggr) {
case AGGR_BUF_FIRST:
ctl6 |= SM(i->aggr_len, AR_AggrLen);
/* fall through */
case AGGR_BUF_MIDDLE:
ctl1 |= AR_IsAggr | AR_MoreAggr;
ctl6 |= SM(i->ndelim, AR_PadDelim);
break;
case AGGR_BUF_LAST:
ctl1 |= AR_IsAggr;
break;
case AGGR_BUF_NONE:
break;
}
ACCESS_ONCE(ads->ds_ctl0) = (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->flags & ATH9K_TXDESC_INTREQ ? AR_TxIntrReq : 0)
| (i->keyix != ATH9K_TXKEYIX_INVALID ? AR_DestIdxValid : 0)
| (i->flags & ATH9K_TXDESC_CLRDMASK ? AR_ClrDestMask : 0)
| (i->flags & ATH9K_TXDESC_RTSENA ? AR_RTSEnable :
(i->flags & ATH9K_TXDESC_CTSENA ? AR_CTSEnable : 0));
ACCESS_ONCE(ads->ds_ctl1) = ctl1;
ACCESS_ONCE(ads->ds_ctl6) = ctl6;
if (i->aggr == AGGR_BUF_MIDDLE || i->aggr == AGGR_BUF_LAST)
return;
ACCESS_ONCE(ads->ds_ctl4) = set11nPktDurRTSCTS(i->rates, 0)
| set11nPktDurRTSCTS(i->rates, 1);
ACCESS_ONCE(ads->ds_ctl5) = set11nPktDurRTSCTS(i->rates, 2)
| set11nPktDurRTSCTS(i->rates, 3);
ACCESS_ONCE(ads->ds_ctl7) = set11nRateFlags(i->rates, 0)
| set11nRateFlags(i->rates, 1)
| set11nRateFlags(i->rates, 2)
| set11nRateFlags(i->rates, 3)
| SM(i->rtscts_rate, AR_RTSCTSRate);
}
static int ar9002_hw_proc_txdesc(struct ath_hw *ah, void *ds,
struct ath_tx_status *ts)
{
struct ar5416_desc *ads = AR5416DESC(ds);
u32 status;
status = ACCESS_ONCE(ads->ds_txstatus9);
if ((status & AR_TxDone) == 0)
return -EINPROGRESS;
ts->ts_tstamp = ads->AR_SendTimestamp;
ts->ts_status = 0;
ts->ts_flags = 0;
if (status & AR_TxOpExceeded)
ts->ts_status |= ATH9K_TXERR_XTXOP;
ts->tid = MS(status, AR_TxTid);
ts->ts_rateindex = MS(status, AR_FinalTxIdx);
ts->ts_seqnum = MS(status, AR_SeqNum);
status = ACCESS_ONCE(ads->ds_txstatus0);
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->AR_BaBitmapLow;
ts->ba_high = ads->AR_BaBitmapHigh;
}
status = ACCESS_ONCE(ads->ds_txstatus1);
if (status & AR_FrmXmitOK)
ts->ts_status |= ATH9K_TX_ACKED;
else {
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->ds_txstatus5);
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);
ts->evm0 = ads->AR_TxEVM0;
ts->evm1 = ads->AR_TxEVM1;
ts->evm2 = ads->AR_TxEVM2;
return 0;
}
void ath9k_hw_setuprxdesc(struct ath_hw *ah, struct ath_desc *ds,
u32 size, u32 flags)
{
struct ar5416_desc *ads = AR5416DESC(ds);
ads->ds_ctl1 = size & AR_BufLen;
if (flags & ATH9K_RXDESC_INTREQ)
ads->ds_ctl1 |= AR_RxIntrReq;
memset(&ads->u.rx, 0, sizeof(ads->u.rx));
}
EXPORT_SYMBOL(ath9k_hw_setuprxdesc);
void ar9002_hw_attach_mac_ops(struct ath_hw *ah)
{
struct ath_hw_ops *ops = ath9k_hw_ops(ah);
ops->rx_enable = ar9002_hw_rx_enable;
ops->set_desc_link = ar9002_hw_set_desc_link;
ops->get_isr = ar9002_hw_get_isr;
ops->set_txdesc = ar9002_set_txdesc;
ops->proc_txdesc = ar9002_hw_proc_txdesc;
}
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