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linux/drivers/net/wireless/ath/ath9k/mac.c
Russell Hu 7368160f0a ath9k: add MSI support 
On new Intel platforms like ApolloLake, legacy interrupt mechanism
(INTx) is not supported, so WLAN modules are not working because
interrupts are missing, therefore this patch is to add MSI support to
ath9k.  With module paremeter "use_msi=1", ath9k driver would try to
use MSI instead of INTx.

Signed-off-by: Russell Hu <rhu@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2018-01-16 16:29:22 +02:00

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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 "hw-ops.h"
#include <linux/export.h>
static void ath9k_hw_set_txq_interrupts(struct ath_hw *ah,
struct ath9k_tx_queue_info *qi)
{
ath_dbg(ath9k_hw_common(ah), INTERRUPT,
"tx ok 0x%x err 0x%x desc 0x%x eol 0x%x urn 0x%x\n",
ah->txok_interrupt_mask, ah->txerr_interrupt_mask,
ah->txdesc_interrupt_mask, ah->txeol_interrupt_mask,
ah->txurn_interrupt_mask);
ENABLE_REGWRITE_BUFFER(ah);
REG_WRITE(ah, AR_IMR_S0,
SM(ah->txok_interrupt_mask, AR_IMR_S0_QCU_TXOK)
| SM(ah->txdesc_interrupt_mask, AR_IMR_S0_QCU_TXDESC));
REG_WRITE(ah, AR_IMR_S1,
SM(ah->txerr_interrupt_mask, AR_IMR_S1_QCU_TXERR)
| SM(ah->txeol_interrupt_mask, AR_IMR_S1_QCU_TXEOL));
ah->imrs2_reg &= ~AR_IMR_S2_QCU_TXURN;
ah->imrs2_reg |= (ah->txurn_interrupt_mask & AR_IMR_S2_QCU_TXURN);
REG_WRITE(ah, AR_IMR_S2, ah->imrs2_reg);
REGWRITE_BUFFER_FLUSH(ah);
}
u32 ath9k_hw_gettxbuf(struct ath_hw *ah, u32 q)
{
return REG_READ(ah, AR_QTXDP(q));
}
EXPORT_SYMBOL(ath9k_hw_gettxbuf);
void ath9k_hw_puttxbuf(struct ath_hw *ah, u32 q, u32 txdp)
{
REG_WRITE(ah, AR_QTXDP(q), txdp);
}
EXPORT_SYMBOL(ath9k_hw_puttxbuf);
void ath9k_hw_txstart(struct ath_hw *ah, u32 q)
{
ath_dbg(ath9k_hw_common(ah), QUEUE, "Enable TXE on queue: %u\n", q);
REG_WRITE(ah, AR_Q_TXE, 1 << q);
}
EXPORT_SYMBOL(ath9k_hw_txstart);
u32 ath9k_hw_numtxpending(struct ath_hw *ah, u32 q)
{
u32 npend;
npend = REG_READ(ah, AR_QSTS(q)) & AR_Q_STS_PEND_FR_CNT;
if (npend == 0) {
if (REG_READ(ah, AR_Q_TXE) & (1 << q))
npend = 1;
}
return npend;
}
EXPORT_SYMBOL(ath9k_hw_numtxpending);
/**
* ath9k_hw_updatetxtriglevel - adjusts the frame trigger level
*
* @ah: atheros hardware struct
* @bIncTrigLevel: whether or not the frame trigger level should be updated
*
* The frame trigger level specifies the minimum number of bytes,
* in units of 64 bytes, that must be DMA'ed into the PCU TX FIFO
* before the PCU will initiate sending the frame on the air. This can
* mean we initiate transmit before a full frame is on the PCU TX FIFO.
* Resets to 0x1 (meaning 64 bytes or a full frame, whichever occurs
* first)
*
* Caution must be taken to ensure to set the frame trigger level based
* on the DMA request size. For example if the DMA request size is set to
* 128 bytes the trigger level cannot exceed 6 * 64 = 384. This is because
* there need to be enough space in the tx FIFO for the requested transfer
* size. Hence the tx FIFO will stop with 512 - 128 = 384 bytes. If we set
* the threshold to a value beyond 6, then the transmit will hang.
*
* Current dual stream devices have a PCU TX FIFO size of 8 KB.
* Current single stream devices have a PCU TX FIFO size of 4 KB, however,
* there is a hardware issue which forces us to use 2 KB instead so the
* frame trigger level must not exceed 2 KB for these chipsets.
*/
bool ath9k_hw_updatetxtriglevel(struct ath_hw *ah, bool bIncTrigLevel)
{
u32 txcfg, curLevel, newLevel;
if (ah->tx_trig_level >= ah->config.max_txtrig_level)
return false;
ath9k_hw_disable_interrupts(ah);
txcfg = REG_READ(ah, AR_TXCFG);
curLevel = MS(txcfg, AR_FTRIG);
newLevel = curLevel;
if (bIncTrigLevel) {
if (curLevel < ah->config.max_txtrig_level)
newLevel++;
} else if (curLevel > MIN_TX_FIFO_THRESHOLD)
newLevel--;
if (newLevel != curLevel)
REG_WRITE(ah, AR_TXCFG,
(txcfg & ~AR_FTRIG) | SM(newLevel, AR_FTRIG));
ath9k_hw_enable_interrupts(ah);
ah->tx_trig_level = newLevel;
return newLevel != curLevel;
}
EXPORT_SYMBOL(ath9k_hw_updatetxtriglevel);
void ath9k_hw_abort_tx_dma(struct ath_hw *ah)
{
int maxdelay = 1000;
int i, q;
if (ah->curchan) {
if (IS_CHAN_HALF_RATE(ah->curchan))
maxdelay *= 2;
else if (IS_CHAN_QUARTER_RATE(ah->curchan))
maxdelay *= 4;
}
REG_WRITE(ah, AR_Q_TXD, AR_Q_TXD_M);
REG_SET_BIT(ah, AR_PCU_MISC, AR_PCU_FORCE_QUIET_COLL | AR_PCU_CLEAR_VMF);
REG_SET_BIT(ah, AR_DIAG_SW, AR_DIAG_FORCE_CH_IDLE_HIGH);
REG_SET_BIT(ah, AR_D_GBL_IFS_MISC, AR_D_GBL_IFS_MISC_IGNORE_BACKOFF);
for (q = 0; q < AR_NUM_QCU; q++) {
for (i = 0; i < maxdelay; i++) {
if (i)
udelay(5);
if (!ath9k_hw_numtxpending(ah, q))
break;
}
}
REG_CLR_BIT(ah, AR_PCU_MISC, AR_PCU_FORCE_QUIET_COLL | AR_PCU_CLEAR_VMF);
REG_CLR_BIT(ah, AR_DIAG_SW, AR_DIAG_FORCE_CH_IDLE_HIGH);
REG_CLR_BIT(ah, AR_D_GBL_IFS_MISC, AR_D_GBL_IFS_MISC_IGNORE_BACKOFF);
REG_WRITE(ah, AR_Q_TXD, 0);
}
EXPORT_SYMBOL(ath9k_hw_abort_tx_dma);
bool ath9k_hw_stop_dma_queue(struct ath_hw *ah, u32 q)
{
#define ATH9K_TX_STOP_DMA_TIMEOUT 1000 /* usec */
#define ATH9K_TIME_QUANTUM 100 /* usec */
int wait_time = ATH9K_TX_STOP_DMA_TIMEOUT / ATH9K_TIME_QUANTUM;
int wait;
REG_WRITE(ah, AR_Q_TXD, 1 << q);
for (wait = wait_time; wait != 0; wait--) {
if (wait != wait_time)
udelay(ATH9K_TIME_QUANTUM);
if (ath9k_hw_numtxpending(ah, q) == 0)
break;
}
REG_WRITE(ah, AR_Q_TXD, 0);
return wait != 0;
#undef ATH9K_TX_STOP_DMA_TIMEOUT
#undef ATH9K_TIME_QUANTUM
}
EXPORT_SYMBOL(ath9k_hw_stop_dma_queue);
bool ath9k_hw_set_txq_props(struct ath_hw *ah, int q,
const struct ath9k_tx_queue_info *qinfo)
{
u32 cw;
struct ath_common *common = ath9k_hw_common(ah);
struct ath9k_tx_queue_info *qi;
qi = &ah->txq[q];
if (qi->tqi_type == ATH9K_TX_QUEUE_INACTIVE) {
ath_dbg(common, QUEUE,
"Set TXQ properties, inactive queue: %u\n", q);
return false;
}
ath_dbg(common, QUEUE, "Set queue properties for: %u\n", q);
qi->tqi_ver = qinfo->tqi_ver;
qi->tqi_subtype = qinfo->tqi_subtype;
qi->tqi_qflags = qinfo->tqi_qflags;
qi->tqi_priority = qinfo->tqi_priority;
if (qinfo->tqi_aifs != ATH9K_TXQ_USEDEFAULT)
qi->tqi_aifs = min(qinfo->tqi_aifs, 255U);
else
qi->tqi_aifs = INIT_AIFS;
if (qinfo->tqi_cwmin != ATH9K_TXQ_USEDEFAULT) {
cw = min(qinfo->tqi_cwmin, 1024U);
qi->tqi_cwmin = 1;
while (qi->tqi_cwmin < cw)
qi->tqi_cwmin = (qi->tqi_cwmin << 1) | 1;
} else
qi->tqi_cwmin = qinfo->tqi_cwmin;
if (qinfo->tqi_cwmax != ATH9K_TXQ_USEDEFAULT) {
cw = min(qinfo->tqi_cwmax, 1024U);
qi->tqi_cwmax = 1;
while (qi->tqi_cwmax < cw)
qi->tqi_cwmax = (qi->tqi_cwmax << 1) | 1;
} else
qi->tqi_cwmax = INIT_CWMAX;
if (qinfo->tqi_shretry != 0)
qi->tqi_shretry = min((u32) qinfo->tqi_shretry, 15U);
else
qi->tqi_shretry = INIT_SH_RETRY;
if (qinfo->tqi_lgretry != 0)
qi->tqi_lgretry = min((u32) qinfo->tqi_lgretry, 15U);
else
qi->tqi_lgretry = INIT_LG_RETRY;
qi->tqi_cbrPeriod = qinfo->tqi_cbrPeriod;
qi->tqi_cbrOverflowLimit = qinfo->tqi_cbrOverflowLimit;
qi->tqi_burstTime = qinfo->tqi_burstTime;
qi->tqi_readyTime = qinfo->tqi_readyTime;
switch (qinfo->tqi_subtype) {
case ATH9K_WME_UPSD:
if (qi->tqi_type == ATH9K_TX_QUEUE_DATA)
qi->tqi_intFlags = ATH9K_TXQ_USE_LOCKOUT_BKOFF_DIS;
break;
default:
break;
}
return true;
}
EXPORT_SYMBOL(ath9k_hw_set_txq_props);
bool ath9k_hw_get_txq_props(struct ath_hw *ah, int q,
struct ath9k_tx_queue_info *qinfo)
{
struct ath_common *common = ath9k_hw_common(ah);
struct ath9k_tx_queue_info *qi;
qi = &ah->txq[q];
if (qi->tqi_type == ATH9K_TX_QUEUE_INACTIVE) {
ath_dbg(common, QUEUE,
"Get TXQ properties, inactive queue: %u\n", q);
return false;
}
qinfo->tqi_qflags = qi->tqi_qflags;
qinfo->tqi_ver = qi->tqi_ver;
qinfo->tqi_subtype = qi->tqi_subtype;
qinfo->tqi_qflags = qi->tqi_qflags;
qinfo->tqi_priority = qi->tqi_priority;
qinfo->tqi_aifs = qi->tqi_aifs;
qinfo->tqi_cwmin = qi->tqi_cwmin;
qinfo->tqi_cwmax = qi->tqi_cwmax;
qinfo->tqi_shretry = qi->tqi_shretry;
qinfo->tqi_lgretry = qi->tqi_lgretry;
qinfo->tqi_cbrPeriod = qi->tqi_cbrPeriod;
qinfo->tqi_cbrOverflowLimit = qi->tqi_cbrOverflowLimit;
qinfo->tqi_burstTime = qi->tqi_burstTime;
qinfo->tqi_readyTime = qi->tqi_readyTime;
return true;
}
EXPORT_SYMBOL(ath9k_hw_get_txq_props);
int ath9k_hw_setuptxqueue(struct ath_hw *ah, enum ath9k_tx_queue type,
const struct ath9k_tx_queue_info *qinfo)
{
struct ath_common *common = ath9k_hw_common(ah);
struct ath9k_tx_queue_info *qi;
int q;
switch (type) {
case ATH9K_TX_QUEUE_BEACON:
q = ATH9K_NUM_TX_QUEUES - 1;
break;
case ATH9K_TX_QUEUE_CAB:
q = ATH9K_NUM_TX_QUEUES - 2;
break;
case ATH9K_TX_QUEUE_PSPOLL:
q = 1;
break;
case ATH9K_TX_QUEUE_UAPSD:
q = ATH9K_NUM_TX_QUEUES - 3;
break;
case ATH9K_TX_QUEUE_DATA:
q = qinfo->tqi_subtype;
break;
default:
ath_err(common, "Invalid TX queue type: %u\n", type);
return -1;
}
ath_dbg(common, QUEUE, "Setup TX queue: %u\n", q);
qi = &ah->txq[q];
if (qi->tqi_type != ATH9K_TX_QUEUE_INACTIVE) {
ath_err(common, "TX queue: %u already active\n", q);
return -1;
}
memset(qi, 0, sizeof(struct ath9k_tx_queue_info));
qi->tqi_type = type;
qi->tqi_physCompBuf = qinfo->tqi_physCompBuf;
(void) ath9k_hw_set_txq_props(ah, q, qinfo);
return q;
}
EXPORT_SYMBOL(ath9k_hw_setuptxqueue);
static void ath9k_hw_clear_queue_interrupts(struct ath_hw *ah, u32 q)
{
ah->txok_interrupt_mask &= ~(1 << q);
ah->txerr_interrupt_mask &= ~(1 << q);
ah->txdesc_interrupt_mask &= ~(1 << q);
ah->txeol_interrupt_mask &= ~(1 << q);
ah->txurn_interrupt_mask &= ~(1 << q);
}
bool ath9k_hw_releasetxqueue(struct ath_hw *ah, u32 q)
{
struct ath_common *common = ath9k_hw_common(ah);
struct ath9k_tx_queue_info *qi;
qi = &ah->txq[q];
if (qi->tqi_type == ATH9K_TX_QUEUE_INACTIVE) {
ath_dbg(common, QUEUE, "Release TXQ, inactive queue: %u\n", q);
return false;
}
ath_dbg(common, QUEUE, "Release TX queue: %u\n", q);
qi->tqi_type = ATH9K_TX_QUEUE_INACTIVE;
ath9k_hw_clear_queue_interrupts(ah, q);
ath9k_hw_set_txq_interrupts(ah, qi);
return true;
}
EXPORT_SYMBOL(ath9k_hw_releasetxqueue);
bool ath9k_hw_resettxqueue(struct ath_hw *ah, u32 q)
{
struct ath_common *common = ath9k_hw_common(ah);
struct ath9k_tx_queue_info *qi;
u32 cwMin, chanCwMin, value;
qi = &ah->txq[q];
if (qi->tqi_type == ATH9K_TX_QUEUE_INACTIVE) {
ath_dbg(common, QUEUE, "Reset TXQ, inactive queue: %u\n", q);
return true;
}
ath_dbg(common, QUEUE, "Reset TX queue: %u\n", q);
if (qi->tqi_cwmin == ATH9K_TXQ_USEDEFAULT) {
chanCwMin = INIT_CWMIN;
for (cwMin = 1; cwMin < chanCwMin; cwMin = (cwMin << 1) | 1);
} else
cwMin = qi->tqi_cwmin;
ENABLE_REGWRITE_BUFFER(ah);
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));
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_shretry, AR_D_RETRY_LIMIT_FR_SH));
REG_WRITE(ah, AR_QMISC(q), AR_Q_MISC_DCU_EARLY_TERM_REQ);
if (AR_SREV_9340(ah) && !AR_SREV_9340_13_OR_LATER(ah))
REG_WRITE(ah, AR_DMISC(q),
AR_D_MISC_CW_BKOFF_EN | AR_D_MISC_FRAG_WAIT_EN | 0x1);
else
REG_WRITE(ah, AR_DMISC(q),
AR_D_MISC_CW_BKOFF_EN | AR_D_MISC_FRAG_WAIT_EN | 0x2);
if (qi->tqi_cbrPeriod) {
REG_WRITE(ah, AR_QCBRCFG(q),
SM(qi->tqi_cbrPeriod, AR_Q_CBRCFG_INTERVAL) |
SM(qi->tqi_cbrOverflowLimit, AR_Q_CBRCFG_OVF_THRESH));
REG_SET_BIT(ah, AR_QMISC(q), AR_Q_MISC_FSP_CBR |
(qi->tqi_cbrOverflowLimit ?
AR_Q_MISC_CBR_EXP_CNTR_LIMIT_EN : 0));
}
if (qi->tqi_readyTime && (qi->tqi_type != ATH9K_TX_QUEUE_CAB)) {
REG_WRITE(ah, AR_QRDYTIMECFG(q),
SM(qi->tqi_readyTime, AR_Q_RDYTIMECFG_DURATION) |
AR_Q_RDYTIMECFG_EN);
}
REG_WRITE(ah, AR_DCHNTIME(q),
SM(qi->tqi_burstTime, AR_D_CHNTIME_DUR) |
(qi->tqi_burstTime ? AR_D_CHNTIME_EN : 0));
if (qi->tqi_burstTime
&& (qi->tqi_qflags & TXQ_FLAG_RDYTIME_EXP_POLICY_ENABLE))
REG_SET_BIT(ah, AR_QMISC(q), AR_Q_MISC_RDYTIME_EXP_POLICY);
if (qi->tqi_qflags & TXQ_FLAG_BACKOFF_DISABLE)
REG_SET_BIT(ah, AR_DMISC(q), AR_D_MISC_POST_FR_BKOFF_DIS);
REGWRITE_BUFFER_FLUSH(ah);
if (qi->tqi_qflags & TXQ_FLAG_FRAG_BURST_BACKOFF_ENABLE)
REG_SET_BIT(ah, AR_DMISC(q), AR_D_MISC_FRAG_BKOFF_EN);
switch (qi->tqi_type) {
case ATH9K_TX_QUEUE_BEACON:
ENABLE_REGWRITE_BUFFER(ah);
REG_SET_BIT(ah, AR_QMISC(q),
AR_Q_MISC_FSP_DBA_GATED
| AR_Q_MISC_BEACON_USE
| AR_Q_MISC_CBR_INCR_DIS1);
REG_SET_BIT(ah, AR_DMISC(q),
(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);
REGWRITE_BUFFER_FLUSH(ah);
/*
* cwmin and cwmax should be 0 for beacon queue
* but not for IBSS as we would create an imbalance
* on beaconing fairness for participating nodes.
*/
if (AR_SREV_9300_20_OR_LATER(ah) &&
ah->opmode != NL80211_IFTYPE_ADHOC) {
REG_WRITE(ah, AR_DLCL_IFS(q), SM(0, AR_D_LCL_IFS_CWMIN)
| SM(0, AR_D_LCL_IFS_CWMAX)
| SM(qi->tqi_aifs, AR_D_LCL_IFS_AIFS));
}
break;
case ATH9K_TX_QUEUE_CAB:
ENABLE_REGWRITE_BUFFER(ah);
REG_SET_BIT(ah, AR_QMISC(q),
AR_Q_MISC_FSP_DBA_GATED
| AR_Q_MISC_CBR_INCR_DIS1
| AR_Q_MISC_CBR_INCR_DIS0);
value = (qi->tqi_readyTime -
(ah->config.sw_beacon_response_time -
ah->config.dma_beacon_response_time)) * 1024;
REG_WRITE(ah, AR_QRDYTIMECFG(q),
value | AR_Q_RDYTIMECFG_EN);
REG_SET_BIT(ah, AR_DMISC(q),
(AR_D_MISC_ARB_LOCKOUT_CNTRL_GLOBAL <<
AR_D_MISC_ARB_LOCKOUT_CNTRL_S));
REGWRITE_BUFFER_FLUSH(ah);
break;
case ATH9K_TX_QUEUE_PSPOLL:
REG_SET_BIT(ah, AR_QMISC(q), AR_Q_MISC_CBR_INCR_DIS1);
break;
case ATH9K_TX_QUEUE_UAPSD:
REG_SET_BIT(ah, AR_DMISC(q), AR_D_MISC_POST_FR_BKOFF_DIS);
break;
default:
break;
}
if (qi->tqi_intFlags & ATH9K_TXQ_USE_LOCKOUT_BKOFF_DIS) {
REG_SET_BIT(ah, AR_DMISC(q),
SM(AR_D_MISC_ARB_LOCKOUT_CNTRL_GLOBAL,
AR_D_MISC_ARB_LOCKOUT_CNTRL) |
AR_D_MISC_POST_FR_BKOFF_DIS);
}
if (AR_SREV_9300_20_OR_LATER(ah))
REG_WRITE(ah, AR_Q_DESC_CRCCHK, AR_Q_DESC_CRCCHK_EN);
ath9k_hw_clear_queue_interrupts(ah, q);
if (qi->tqi_qflags & TXQ_FLAG_TXINT_ENABLE) {
ah->txok_interrupt_mask |= 1 << q;
ah->txerr_interrupt_mask |= 1 << q;
}
if (qi->tqi_qflags & TXQ_FLAG_TXDESCINT_ENABLE)
ah->txdesc_interrupt_mask |= 1 << q;
if (qi->tqi_qflags & TXQ_FLAG_TXEOLINT_ENABLE)
ah->txeol_interrupt_mask |= 1 << q;
if (qi->tqi_qflags & TXQ_FLAG_TXURNINT_ENABLE)
ah->txurn_interrupt_mask |= 1 << q;
ath9k_hw_set_txq_interrupts(ah, qi);
return true;
}
EXPORT_SYMBOL(ath9k_hw_resettxqueue);
int ath9k_hw_rxprocdesc(struct ath_hw *ah, struct ath_desc *ds,
struct ath_rx_status *rs)
{
struct ar5416_desc ads;
struct ar5416_desc *adsp = AR5416DESC(ds);
u32 phyerr;
if ((adsp->ds_rxstatus8 & AR_RxDone) == 0)
return -EINPROGRESS;
ads.u.rx = adsp->u.rx;
rs->rs_status = 0;
rs->rs_flags = 0;
rs->enc_flags = 0;
rs->bw = RATE_INFO_BW_20;
rs->rs_datalen = ads.ds_rxstatus1 & AR_DataLen;
rs->rs_tstamp = ads.AR_RcvTimestamp;
if (ads.ds_rxstatus8 & AR_PostDelimCRCErr) {
rs->rs_rssi = ATH9K_RSSI_BAD;
rs->rs_rssi_ctl[0] = ATH9K_RSSI_BAD;
rs->rs_rssi_ctl[1] = ATH9K_RSSI_BAD;
rs->rs_rssi_ctl[2] = ATH9K_RSSI_BAD;
rs->rs_rssi_ext[0] = ATH9K_RSSI_BAD;
rs->rs_rssi_ext[1] = ATH9K_RSSI_BAD;
rs->rs_rssi_ext[2] = ATH9K_RSSI_BAD;
} else {
rs->rs_rssi = MS(ads.ds_rxstatus4, AR_RxRSSICombined);
rs->rs_rssi_ctl[0] = MS(ads.ds_rxstatus0,
AR_RxRSSIAnt00);
rs->rs_rssi_ctl[1] = MS(ads.ds_rxstatus0,
AR_RxRSSIAnt01);
rs->rs_rssi_ctl[2] = MS(ads.ds_rxstatus0,
AR_RxRSSIAnt02);
rs->rs_rssi_ext[0] = MS(ads.ds_rxstatus4,
AR_RxRSSIAnt10);
rs->rs_rssi_ext[1] = MS(ads.ds_rxstatus4,
AR_RxRSSIAnt11);
rs->rs_rssi_ext[2] = MS(ads.ds_rxstatus4,
AR_RxRSSIAnt12);
}
if (ads.ds_rxstatus8 & AR_RxKeyIdxValid)
rs->rs_keyix = MS(ads.ds_rxstatus8, AR_KeyIdx);
else
rs->rs_keyix = ATH9K_RXKEYIX_INVALID;
rs->rs_rate = MS(ads.ds_rxstatus0, AR_RxRate);
rs->rs_more = (ads.ds_rxstatus1 & AR_RxMore) ? 1 : 0;
rs->rs_firstaggr = (ads.ds_rxstatus8 & AR_RxFirstAggr) ? 1 : 0;
rs->rs_isaggr = (ads.ds_rxstatus8 & AR_RxAggr) ? 1 : 0;
rs->rs_moreaggr = (ads.ds_rxstatus8 & AR_RxMoreAggr) ? 1 : 0;
rs->rs_antenna = MS(ads.ds_rxstatus3, AR_RxAntenna);
/* directly mapped flags for ieee80211_rx_status */
rs->enc_flags |=
(ads.ds_rxstatus3 & AR_GI) ? RX_ENC_FLAG_SHORT_GI : 0;
rs->bw = (ads.ds_rxstatus3 & AR_2040) ? RATE_INFO_BW_40 :
RATE_INFO_BW_20;
if (AR_SREV_9280_20_OR_LATER(ah))
rs->enc_flags |=
(ads.ds_rxstatus3 & AR_STBC) ?
/* we can only Nss=1 STBC */
(1 << RX_ENC_FLAG_STBC_SHIFT) : 0;
if (ads.ds_rxstatus8 & AR_PreDelimCRCErr)
rs->rs_flags |= ATH9K_RX_DELIM_CRC_PRE;
if (ads.ds_rxstatus8 & AR_PostDelimCRCErr)
rs->rs_flags |= ATH9K_RX_DELIM_CRC_POST;
if (ads.ds_rxstatus8 & AR_DecryptBusyErr)
rs->rs_flags |= ATH9K_RX_DECRYPT_BUSY;
if ((ads.ds_rxstatus8 & AR_RxFrameOK) == 0) {
/*
* Treat these errors as mutually exclusive to avoid spurious
* extra error reports from the hardware. If a CRC error is
* reported, then decryption and MIC errors are irrelevant,
* the frame is going to be dropped either way
*/
if (ads.ds_rxstatus8 & AR_PHYErr) {
rs->rs_status |= ATH9K_RXERR_PHY;
phyerr = MS(ads.ds_rxstatus8, AR_PHYErrCode);
rs->rs_phyerr = phyerr;
} else if (ads.ds_rxstatus8 & AR_CRCErr)
rs->rs_status |= ATH9K_RXERR_CRC;
else if (ads.ds_rxstatus8 & AR_DecryptCRCErr)
rs->rs_status |= ATH9K_RXERR_DECRYPT;
else if (ads.ds_rxstatus8 & AR_MichaelErr)
rs->rs_status |= ATH9K_RXERR_MIC;
} else {
if (ads.ds_rxstatus8 &
(AR_CRCErr | AR_PHYErr | AR_DecryptCRCErr | AR_MichaelErr))
rs->rs_status |= ATH9K_RXERR_CORRUPT_DESC;
/* Only up to MCS16 supported, everything above is invalid */
if (rs->rs_rate >= 0x90)
rs->rs_status |= ATH9K_RXERR_CORRUPT_DESC;
}
if (ads.ds_rxstatus8 & AR_KeyMiss)
rs->rs_status |= ATH9K_RXERR_KEYMISS;
return 0;
}
EXPORT_SYMBOL(ath9k_hw_rxprocdesc);
/*
* This can stop or re-enables RX.
*
* If bool is set this will kill any frame which is currently being
* transferred between the MAC and baseband and also prevent any new
* frames from getting started.
*/
bool ath9k_hw_setrxabort(struct ath_hw *ah, bool set)
{
u32 reg;
if (set) {
REG_SET_BIT(ah, AR_DIAG_SW,
(AR_DIAG_RX_DIS | AR_DIAG_RX_ABORT));
if (!ath9k_hw_wait(ah, AR_OBS_BUS_1, AR_OBS_BUS_1_RX_STATE,
0, AH_WAIT_TIMEOUT)) {
REG_CLR_BIT(ah, AR_DIAG_SW,
(AR_DIAG_RX_DIS |
AR_DIAG_RX_ABORT));
reg = REG_READ(ah, AR_OBS_BUS_1);
ath_err(ath9k_hw_common(ah),
"RX failed to go idle in 10 ms RXSM=0x%x\n",
reg);
return false;
}
} else {
REG_CLR_BIT(ah, AR_DIAG_SW,
(AR_DIAG_RX_DIS | AR_DIAG_RX_ABORT));
}
return true;
}
EXPORT_SYMBOL(ath9k_hw_setrxabort);
void ath9k_hw_putrxbuf(struct ath_hw *ah, u32 rxdp)
{
REG_WRITE(ah, AR_RXDP, rxdp);
}
EXPORT_SYMBOL(ath9k_hw_putrxbuf);
void ath9k_hw_startpcureceive(struct ath_hw *ah, bool is_scanning)
{
ath9k_enable_mib_counters(ah);
ath9k_ani_reset(ah, is_scanning);
REG_CLR_BIT(ah, AR_DIAG_SW, (AR_DIAG_RX_DIS | AR_DIAG_RX_ABORT));
}
EXPORT_SYMBOL(ath9k_hw_startpcureceive);
void ath9k_hw_abortpcurecv(struct ath_hw *ah)
{
REG_SET_BIT(ah, AR_DIAG_SW, AR_DIAG_RX_ABORT | AR_DIAG_RX_DIS);
ath9k_hw_disable_mib_counters(ah);
}
EXPORT_SYMBOL(ath9k_hw_abortpcurecv);
bool ath9k_hw_stopdmarecv(struct ath_hw *ah, bool *reset)
{
#define AH_RX_STOP_DMA_TIMEOUT 10000 /* usec */
struct ath_common *common = ath9k_hw_common(ah);
u32 mac_status, last_mac_status = 0;
int i;
/* Enable access to the DMA observation bus */
REG_WRITE(ah, AR_MACMISC,
((AR_MACMISC_DMA_OBS_LINE_8 << AR_MACMISC_DMA_OBS_S) |
(AR_MACMISC_MISC_OBS_BUS_1 <<
AR_MACMISC_MISC_OBS_BUS_MSB_S)));
REG_WRITE(ah, AR_CR, AR_CR_RXD);
/* Wait for rx enable bit to go low */
for (i = AH_RX_STOP_DMA_TIMEOUT / AH_TIME_QUANTUM; i != 0; i--) {
if ((REG_READ(ah, AR_CR) & AR_CR_RXE) == 0)
break;
if (!AR_SREV_9300_20_OR_LATER(ah)) {
mac_status = REG_READ(ah, AR_DMADBG_7) & 0x7f0;
if (mac_status == 0x1c0 && mac_status == last_mac_status) {
*reset = true;
break;
}
last_mac_status = mac_status;
}
udelay(AH_TIME_QUANTUM);
}
if (i == 0) {
ath_err(common,
"DMA failed to stop in %d ms AR_CR=0x%08x AR_DIAG_SW=0x%08x DMADBG_7=0x%08x\n",
AH_RX_STOP_DMA_TIMEOUT / 1000,
REG_READ(ah, AR_CR),
REG_READ(ah, AR_DIAG_SW),
REG_READ(ah, AR_DMADBG_7));
return false;
} else {
return true;
}
#undef AH_RX_STOP_DMA_TIMEOUT
}
EXPORT_SYMBOL(ath9k_hw_stopdmarecv);
int ath9k_hw_beaconq_setup(struct ath_hw *ah)
{
struct ath9k_tx_queue_info qi;
memset(&qi, 0, sizeof(qi));
qi.tqi_aifs = 1;
qi.tqi_cwmin = 0;
qi.tqi_cwmax = 0;
if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
qi.tqi_qflags = TXQ_FLAG_TXINT_ENABLE;
return ath9k_hw_setuptxqueue(ah, ATH9K_TX_QUEUE_BEACON, &qi);
}
EXPORT_SYMBOL(ath9k_hw_beaconq_setup);
bool ath9k_hw_intrpend(struct ath_hw *ah)
{
u32 host_isr;
if (AR_SREV_9100(ah))
return true;
host_isr = REG_READ(ah, AR_INTR_ASYNC_CAUSE);
if (((host_isr & AR_INTR_MAC_IRQ) ||
(host_isr & AR_INTR_ASYNC_MASK_MCI)) &&
(host_isr != AR_INTR_SPURIOUS))
return true;
host_isr = REG_READ(ah, AR_INTR_SYNC_CAUSE);
if ((host_isr & AR_INTR_SYNC_DEFAULT)
&& (host_isr != AR_INTR_SPURIOUS))
return true;
return false;
}
EXPORT_SYMBOL(ath9k_hw_intrpend);
void ath9k_hw_kill_interrupts(struct ath_hw *ah)
{
struct ath_common *common = ath9k_hw_common(ah);
ath_dbg(common, INTERRUPT, "disable IER\n");
REG_WRITE(ah, AR_IER, AR_IER_DISABLE);
(void) REG_READ(ah, AR_IER);
if (!AR_SREV_9100(ah)) {
REG_WRITE(ah, AR_INTR_ASYNC_ENABLE, 0);
(void) REG_READ(ah, AR_INTR_ASYNC_ENABLE);
REG_WRITE(ah, AR_INTR_SYNC_ENABLE, 0);
(void) REG_READ(ah, AR_INTR_SYNC_ENABLE);
}
}
EXPORT_SYMBOL(ath9k_hw_kill_interrupts);
void ath9k_hw_disable_interrupts(struct ath_hw *ah)
{
if (!(ah->imask & ATH9K_INT_GLOBAL))
atomic_set(&ah->intr_ref_cnt, -1);
else
atomic_dec(&ah->intr_ref_cnt);
ath9k_hw_kill_interrupts(ah);
}
EXPORT_SYMBOL(ath9k_hw_disable_interrupts);
static void __ath9k_hw_enable_interrupts(struct ath_hw *ah)
{
struct ath_common *common = ath9k_hw_common(ah);
u32 sync_default = AR_INTR_SYNC_DEFAULT;
u32 async_mask;
if (AR_SREV_9340(ah) || AR_SREV_9550(ah) || AR_SREV_9531(ah) ||
AR_SREV_9561(ah))
sync_default &= ~AR_INTR_SYNC_HOST1_FATAL;
async_mask = AR_INTR_MAC_IRQ;
if (ah->imask & ATH9K_INT_MCI)
async_mask |= AR_INTR_ASYNC_MASK_MCI;
ath_dbg(common, INTERRUPT, "enable IER\n");
REG_WRITE(ah, AR_IER, AR_IER_ENABLE);
if (!AR_SREV_9100(ah)) {
REG_WRITE(ah, AR_INTR_ASYNC_ENABLE, async_mask);
REG_WRITE(ah, AR_INTR_ASYNC_MASK, async_mask);
REG_WRITE(ah, AR_INTR_SYNC_ENABLE, sync_default);
REG_WRITE(ah, AR_INTR_SYNC_MASK, sync_default);
}
ath_dbg(common, INTERRUPT, "AR_IMR 0x%x IER 0x%x\n",
REG_READ(ah, AR_IMR), REG_READ(ah, AR_IER));
if (ah->msi_enabled) {
u32 _msi_reg = 0;
u32 i = 0;
u32 msi_pend_addr_mask = AR_PCIE_MSI_HW_INT_PENDING_ADDR_MSI_64;
ath_dbg(ath9k_hw_common(ah), INTERRUPT,
"Enabling MSI, msi_mask=0x%X\n", ah->msi_mask);
REG_WRITE(ah, AR_INTR_PRIO_ASYNC_ENABLE, ah->msi_mask);
REG_WRITE(ah, AR_INTR_PRIO_ASYNC_MASK, ah->msi_mask);
ath_dbg(ath9k_hw_common(ah), INTERRUPT,
"AR_INTR_PRIO_ASYNC_ENABLE=0x%X, AR_INTR_PRIO_ASYNC_MASK=0x%X\n",
REG_READ(ah, AR_INTR_PRIO_ASYNC_ENABLE),
REG_READ(ah, AR_INTR_PRIO_ASYNC_MASK));
if (ah->msi_reg == 0)
ah->msi_reg = REG_READ(ah, AR_PCIE_MSI);
ath_dbg(ath9k_hw_common(ah), INTERRUPT,
"AR_PCIE_MSI=0x%X, ah->msi_reg = 0x%X\n",
AR_PCIE_MSI, ah->msi_reg);
i = 0;
do {
REG_WRITE(ah, AR_PCIE_MSI,
(ah->msi_reg | AR_PCIE_MSI_ENABLE)
& msi_pend_addr_mask);
_msi_reg = REG_READ(ah, AR_PCIE_MSI);
i++;
} while ((_msi_reg & AR_PCIE_MSI_ENABLE) == 0 && i < 200);
if (i >= 200)
ath_err(ath9k_hw_common(ah),
"%s: _msi_reg = 0x%X\n",
__func__, _msi_reg);
}
}
void ath9k_hw_resume_interrupts(struct ath_hw *ah)
{
struct ath_common *common = ath9k_hw_common(ah);
if (!(ah->imask & ATH9K_INT_GLOBAL))
return;
if (atomic_read(&ah->intr_ref_cnt) != 0) {
ath_dbg(common, INTERRUPT, "Do not enable IER ref count %d\n",
atomic_read(&ah->intr_ref_cnt));
return;
}
__ath9k_hw_enable_interrupts(ah);
}
EXPORT_SYMBOL(ath9k_hw_resume_interrupts);
void ath9k_hw_enable_interrupts(struct ath_hw *ah)
{
struct ath_common *common = ath9k_hw_common(ah);
if (!(ah->imask & ATH9K_INT_GLOBAL))
return;
if (!atomic_inc_and_test(&ah->intr_ref_cnt)) {
ath_dbg(common, INTERRUPT, "Do not enable IER ref count %d\n",
atomic_read(&ah->intr_ref_cnt));
return;
}
__ath9k_hw_enable_interrupts(ah);
}
EXPORT_SYMBOL(ath9k_hw_enable_interrupts);
void ath9k_hw_set_interrupts(struct ath_hw *ah)
{
enum ath9k_int ints = ah->imask;
u32 mask, mask2;
struct ath9k_hw_capabilities *pCap = &ah->caps;
struct ath_common *common = ath9k_hw_common(ah);
if (!(ints & ATH9K_INT_GLOBAL))
ath9k_hw_disable_interrupts(ah);
if (ah->msi_enabled) {
ath_dbg(common, INTERRUPT, "Clearing AR_INTR_PRIO_ASYNC_ENABLE\n");
REG_WRITE(ah, AR_INTR_PRIO_ASYNC_ENABLE, 0);
REG_READ(ah, AR_INTR_PRIO_ASYNC_ENABLE);
}
ath_dbg(common, INTERRUPT, "New interrupt mask 0x%x\n", ints);
mask = ints & ATH9K_INT_COMMON;
mask2 = 0;
ah->msi_mask = 0;
if (ints & ATH9K_INT_TX) {
ah->msi_mask |= AR_INTR_PRIO_TX;
if (ah->config.tx_intr_mitigation)
mask |= AR_IMR_TXMINTR | AR_IMR_TXINTM;
else {
if (ah->txok_interrupt_mask)
mask |= AR_IMR_TXOK;
if (ah->txdesc_interrupt_mask)
mask |= AR_IMR_TXDESC;
}
if (ah->txerr_interrupt_mask)
mask |= AR_IMR_TXERR;
if (ah->txeol_interrupt_mask)
mask |= AR_IMR_TXEOL;
}
if (ints & ATH9K_INT_RX) {
ah->msi_mask |= AR_INTR_PRIO_RXLP | AR_INTR_PRIO_RXHP;
if (AR_SREV_9300_20_OR_LATER(ah)) {
mask |= AR_IMR_RXERR | AR_IMR_RXOK_HP;
if (ah->config.rx_intr_mitigation) {
mask &= ~AR_IMR_RXOK_LP;
mask |= AR_IMR_RXMINTR | AR_IMR_RXINTM;
} else {
mask |= AR_IMR_RXOK_LP;
}
} else {
if (ah->config.rx_intr_mitigation)
mask |= AR_IMR_RXMINTR | AR_IMR_RXINTM;
else
mask |= AR_IMR_RXOK | AR_IMR_RXDESC;
}
if (!(pCap->hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
mask |= AR_IMR_GENTMR;
}
if (ints & ATH9K_INT_GENTIMER)
mask |= AR_IMR_GENTMR;
if (ints & (ATH9K_INT_BMISC)) {
mask |= AR_IMR_BCNMISC;
if (ints & ATH9K_INT_TIM)
mask2 |= AR_IMR_S2_TIM;
if (ints & ATH9K_INT_DTIM)
mask2 |= AR_IMR_S2_DTIM;
if (ints & ATH9K_INT_DTIMSYNC)
mask2 |= AR_IMR_S2_DTIMSYNC;
if (ints & ATH9K_INT_CABEND)
mask2 |= AR_IMR_S2_CABEND;
if (ints & ATH9K_INT_TSFOOR)
mask2 |= AR_IMR_S2_TSFOOR;
}
if (ints & (ATH9K_INT_GTT | ATH9K_INT_CST)) {
mask |= AR_IMR_BCNMISC;
if (ints & ATH9K_INT_GTT)
mask2 |= AR_IMR_S2_GTT;
if (ints & ATH9K_INT_CST)
mask2 |= AR_IMR_S2_CST;
}
if (ah->config.hw_hang_checks & HW_BB_WATCHDOG) {
if (ints & ATH9K_INT_BB_WATCHDOG) {
mask |= AR_IMR_BCNMISC;
mask2 |= AR_IMR_S2_BB_WATCHDOG;
}
}
ath_dbg(common, INTERRUPT, "new IMR 0x%x\n", mask);
REG_WRITE(ah, AR_IMR, mask);
ah->imrs2_reg &= ~(AR_IMR_S2_TIM |
AR_IMR_S2_DTIM |
AR_IMR_S2_DTIMSYNC |
AR_IMR_S2_CABEND |
AR_IMR_S2_CABTO |
AR_IMR_S2_TSFOOR |
AR_IMR_S2_GTT |
AR_IMR_S2_CST);
if (ah->config.hw_hang_checks & HW_BB_WATCHDOG) {
if (ints & ATH9K_INT_BB_WATCHDOG)
ah->imrs2_reg &= ~AR_IMR_S2_BB_WATCHDOG;
}
ah->imrs2_reg |= mask2;
REG_WRITE(ah, AR_IMR_S2, ah->imrs2_reg);
if (!(pCap->hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
if (ints & ATH9K_INT_TIM_TIMER)
REG_SET_BIT(ah, AR_IMR_S5, AR_IMR_S5_TIM_TIMER);
else
REG_CLR_BIT(ah, AR_IMR_S5, AR_IMR_S5_TIM_TIMER);
}
return;
}
EXPORT_SYMBOL(ath9k_hw_set_interrupts);
#define ATH9K_HW_MAX_DCU 10
#define ATH9K_HW_SLICE_PER_DCU 16
#define ATH9K_HW_BIT_IN_SLICE 16
void ath9k_hw_set_tx_filter(struct ath_hw *ah, u8 destidx, bool set)
{
int dcu_idx;
u32 filter;
for (dcu_idx = 0; dcu_idx < 10; dcu_idx++) {
filter = SM(set, AR_D_TXBLK_WRITE_COMMAND);
filter |= SM(dcu_idx, AR_D_TXBLK_WRITE_DCU);
filter |= SM((destidx / ATH9K_HW_SLICE_PER_DCU),
AR_D_TXBLK_WRITE_SLICE);
filter |= BIT(destidx % ATH9K_HW_BIT_IN_SLICE);
ath_dbg(ath9k_hw_common(ah), PS,
"DCU%d staid %d set %d txfilter %08x\n",
dcu_idx, destidx, set, filter);
REG_WRITE(ah, AR_D_TXBLK_BASE, filter);
}
}
EXPORT_SYMBOL(ath9k_hw_set_tx_filter);
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