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linux-pinenote/drivers/net/wireless/ath/ath9k/main.c
Rajkumar Manoharan 124b979bae ath9k: Fix race in reset-work usage 
Using work_pending() to defer certain operations when
a HW-reset work has been queued is racy since the check
would return false when the work item is actually in
execution. Use SC_OP_HW_RESET instead to fix this race.
Also, unify the reset debug statistics maintenance.

Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-07-17 15:11:40 -04:00

2451 lines
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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 <linux/nl80211.h>
#include <linux/delay.h>
#include "ath9k.h"
#include "btcoex.h"
static void ath9k_set_assoc_state(struct ath_softc *sc,
struct ieee80211_vif *vif);
u8 ath9k_parse_mpdudensity(u8 mpdudensity)
{
/*
* 802.11n D2.0 defined values for "Minimum MPDU Start Spacing":
* 0 for no restriction
* 1 for 1/4 us
* 2 for 1/2 us
* 3 for 1 us
* 4 for 2 us
* 5 for 4 us
* 6 for 8 us
* 7 for 16 us
*/
switch (mpdudensity) {
case 0:
return 0;
case 1:
case 2:
case 3:
/* Our lower layer calculations limit our precision to
1 microsecond */
return 1;
case 4:
return 2;
case 5:
return 4;
case 6:
return 8;
case 7:
return 16;
default:
return 0;
}
}
static bool ath9k_has_pending_frames(struct ath_softc *sc, struct ath_txq *txq)
{
bool pending = false;
spin_lock_bh(&txq->axq_lock);
if (txq->axq_depth || !list_empty(&txq->axq_acq))
pending = true;
spin_unlock_bh(&txq->axq_lock);
return pending;
}
static bool ath9k_setpower(struct ath_softc *sc, enum ath9k_power_mode mode)
{
unsigned long flags;
bool ret;
spin_lock_irqsave(&sc->sc_pm_lock, flags);
ret = ath9k_hw_setpower(sc->sc_ah, mode);
spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
return ret;
}
void ath9k_ps_wakeup(struct ath_softc *sc)
{
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
unsigned long flags;
enum ath9k_power_mode power_mode;
spin_lock_irqsave(&sc->sc_pm_lock, flags);
if (++sc->ps_usecount != 1)
goto unlock;
power_mode = sc->sc_ah->power_mode;
ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
/*
* While the hardware is asleep, the cycle counters contain no
* useful data. Better clear them now so that they don't mess up
* survey data results.
*/
if (power_mode != ATH9K_PM_AWAKE) {
spin_lock(&common->cc_lock);
ath_hw_cycle_counters_update(common);
memset(&common->cc_survey, 0, sizeof(common->cc_survey));
memset(&common->cc_ani, 0, sizeof(common->cc_ani));
spin_unlock(&common->cc_lock);
}
unlock:
spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
}
void ath9k_ps_restore(struct ath_softc *sc)
{
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
enum ath9k_power_mode mode;
unsigned long flags;
bool reset;
spin_lock_irqsave(&sc->sc_pm_lock, flags);
if (--sc->ps_usecount != 0)
goto unlock;
if (sc->ps_idle) {
ath9k_hw_setrxabort(sc->sc_ah, 1);
ath9k_hw_stopdmarecv(sc->sc_ah, &reset);
mode = ATH9K_PM_FULL_SLEEP;
} else if (sc->ps_enabled &&
!(sc->ps_flags & (PS_WAIT_FOR_BEACON |
PS_WAIT_FOR_CAB |
PS_WAIT_FOR_PSPOLL_DATA |
PS_WAIT_FOR_TX_ACK))) {
mode = ATH9K_PM_NETWORK_SLEEP;
if (ath9k_hw_btcoex_is_enabled(sc->sc_ah))
ath9k_btcoex_stop_gen_timer(sc);
} else {
goto unlock;
}
spin_lock(&common->cc_lock);
ath_hw_cycle_counters_update(common);
spin_unlock(&common->cc_lock);
ath9k_hw_setpower(sc->sc_ah, mode);
unlock:
spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
}
static void __ath_cancel_work(struct ath_softc *sc)
{
cancel_work_sync(&sc->paprd_work);
cancel_work_sync(&sc->hw_check_work);
cancel_delayed_work_sync(&sc->tx_complete_work);
cancel_delayed_work_sync(&sc->hw_pll_work);
#ifdef CONFIG_ATH9K_BTCOEX_SUPPORT
if (ath9k_hw_mci_is_enabled(sc->sc_ah))
cancel_work_sync(&sc->mci_work);
#endif
}
static void ath_cancel_work(struct ath_softc *sc)
{
__ath_cancel_work(sc);
cancel_work_sync(&sc->hw_reset_work);
}
static void ath_restart_work(struct ath_softc *sc)
{
ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
if (AR_SREV_9340(sc->sc_ah) || AR_SREV_9485(sc->sc_ah) ||
AR_SREV_9550(sc->sc_ah))
ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work,
msecs_to_jiffies(ATH_PLL_WORK_INTERVAL));
ath_start_rx_poll(sc, 3);
ath_start_ani(sc);
}
static bool ath_prepare_reset(struct ath_softc *sc, bool retry_tx, bool flush)
{
struct ath_hw *ah = sc->sc_ah;
bool ret = true;
ieee80211_stop_queues(sc->hw);
sc->hw_busy_count = 0;
ath_stop_ani(sc);
del_timer_sync(&sc->rx_poll_timer);
ath9k_debug_samp_bb_mac(sc);
ath9k_hw_disable_interrupts(ah);
if (!ath_stoprecv(sc))
ret = false;
if (!ath_drain_all_txq(sc, retry_tx))
ret = false;
if (!flush) {
if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
ath_rx_tasklet(sc, 1, true);
ath_rx_tasklet(sc, 1, false);
} else {
ath_flushrecv(sc);
}
return ret;
}
static bool ath_complete_reset(struct ath_softc *sc, bool start)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
unsigned long flags;
if (ath_startrecv(sc) != 0) {
ath_err(common, "Unable to restart recv logic\n");
return false;
}
ath9k_cmn_update_txpow(ah, sc->curtxpow,
sc->config.txpowlimit, &sc->curtxpow);
clear_bit(SC_OP_HW_RESET, &sc->sc_flags);
ath9k_hw_set_interrupts(ah);
ath9k_hw_enable_interrupts(ah);
if (!(sc->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) && start) {
if (!test_bit(SC_OP_BEACONS, &sc->sc_flags))
goto work;
ath9k_set_beacon(sc);
if (ah->opmode == NL80211_IFTYPE_STATION &&
test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags)) {
spin_lock_irqsave(&sc->sc_pm_lock, flags);
sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
}
work:
ath_restart_work(sc);
}
if ((ah->caps.hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB) && sc->ant_rx != 3)
ath_ant_comb_update(sc);
ieee80211_wake_queues(sc->hw);
return true;
}
static int ath_reset_internal(struct ath_softc *sc, struct ath9k_channel *hchan,
bool retry_tx)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ath9k_hw_cal_data *caldata = NULL;
bool fastcc = true;
bool flush = false;
int r;
__ath_cancel_work(sc);
spin_lock_bh(&sc->sc_pcu_lock);
if (!(sc->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)) {
fastcc = false;
caldata = &sc->caldata;
}
if (!hchan) {
fastcc = false;
flush = true;
hchan = ah->curchan;
}
if (!ath_prepare_reset(sc, retry_tx, flush))
fastcc = false;
ath_dbg(common, CONFIG, "Reset to %u MHz, HT40: %d fastcc: %d\n",
hchan->channel, IS_CHAN_HT40(hchan), fastcc);
r = ath9k_hw_reset(ah, hchan, caldata, fastcc);
if (r) {
ath_err(common,
"Unable to reset channel, reset status %d\n", r);
goto out;
}
if (!ath_complete_reset(sc, true))
r = -EIO;
out:
spin_unlock_bh(&sc->sc_pcu_lock);
return r;
}
/*
* Set/change channels. If the channel is really being changed, it's done
* by reseting the chip. To accomplish this we must first cleanup any pending
* DMA, then restart stuff.
*/
static int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
struct ath9k_channel *hchan)
{
int r;
if (test_bit(SC_OP_INVALID, &sc->sc_flags))
return -EIO;
r = ath_reset_internal(sc, hchan, false);
return r;
}
static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta,
struct ieee80211_vif *vif)
{
struct ath_node *an;
u8 density;
an = (struct ath_node *)sta->drv_priv;
#ifdef CONFIG_ATH9K_DEBUGFS
spin_lock(&sc->nodes_lock);
list_add(&an->list, &sc->nodes);
spin_unlock(&sc->nodes_lock);
#endif
an->sta = sta;
an->vif = vif;
if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT) {
ath_tx_node_init(sc, an);
an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
sta->ht_cap.ampdu_factor);
density = ath9k_parse_mpdudensity(sta->ht_cap.ampdu_density);
an->mpdudensity = density;
}
}
static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
{
struct ath_node *an = (struct ath_node *)sta->drv_priv;
#ifdef CONFIG_ATH9K_DEBUGFS
spin_lock(&sc->nodes_lock);
list_del(&an->list);
spin_unlock(&sc->nodes_lock);
an->sta = NULL;
#endif
if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT)
ath_tx_node_cleanup(sc, an);
}
void ath9k_tasklet(unsigned long data)
{
struct ath_softc *sc = (struct ath_softc *)data;
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
enum ath_reset_type type;
unsigned long flags;
u32 status = sc->intrstatus;
u32 rxmask;
ath9k_ps_wakeup(sc);
spin_lock(&sc->sc_pcu_lock);
if ((status & ATH9K_INT_FATAL) ||
(status & ATH9K_INT_BB_WATCHDOG)) {
if (status & ATH9K_INT_FATAL)
type = RESET_TYPE_FATAL_INT;
else
type = RESET_TYPE_BB_WATCHDOG;
ath9k_queue_reset(sc, type);
goto out;
}
spin_lock_irqsave(&sc->sc_pm_lock, flags);
if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
/*
* TSF sync does not look correct; remain awake to sync with
* the next Beacon.
*/
ath_dbg(common, PS, "TSFOOR - Sync with next Beacon\n");
sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
}
spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL |
ATH9K_INT_RXORN);
else
rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
if (status & rxmask) {
/* Check for high priority Rx first */
if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
(status & ATH9K_INT_RXHP))
ath_rx_tasklet(sc, 0, true);
ath_rx_tasklet(sc, 0, false);
}
if (status & ATH9K_INT_TX) {
if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
ath_tx_edma_tasklet(sc);
else
ath_tx_tasklet(sc);
}
ath9k_btcoex_handle_interrupt(sc, status);
out:
/* re-enable hardware interrupt */
ath9k_hw_enable_interrupts(ah);
spin_unlock(&sc->sc_pcu_lock);
ath9k_ps_restore(sc);
}
irqreturn_t ath_isr(int irq, void *dev)
{
#define SCHED_INTR ( \
ATH9K_INT_FATAL | \
ATH9K_INT_BB_WATCHDOG | \
ATH9K_INT_RXORN | \
ATH9K_INT_RXEOL | \
ATH9K_INT_RX | \
ATH9K_INT_RXLP | \
ATH9K_INT_RXHP | \
ATH9K_INT_TX | \
ATH9K_INT_BMISS | \
ATH9K_INT_CST | \
ATH9K_INT_TSFOOR | \
ATH9K_INT_GENTIMER | \
ATH9K_INT_MCI)
struct ath_softc *sc = dev;
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
enum ath9k_int status;
bool sched = false;
/*
* The hardware is not ready/present, don't
* touch anything. Note this can happen early
* on if the IRQ is shared.
*/
if (test_bit(SC_OP_INVALID, &sc->sc_flags))
return IRQ_NONE;
/* shared irq, not for us */
if (!ath9k_hw_intrpend(ah))
return IRQ_NONE;
if(test_bit(SC_OP_HW_RESET, &sc->sc_flags))
return IRQ_HANDLED;
/*
* Figure out the reason(s) for the interrupt. Note
* that the hal returns a pseudo-ISR that may include
* bits we haven't explicitly enabled so we mask the
* value to insure we only process bits we requested.
*/
ath9k_hw_getisr(ah, &status); /* NB: clears ISR too */
status &= ah->imask; /* discard unasked-for bits */
/*
* If there are no status bits set, then this interrupt was not
* for me (should have been caught above).
*/
if (!status)
return IRQ_NONE;
/* Cache the status */
sc->intrstatus = status;
if (status & SCHED_INTR)
sched = true;
#ifdef CONFIG_PM_SLEEP
if (status & ATH9K_INT_BMISS) {
if (atomic_read(&sc->wow_sleep_proc_intr) == 0) {
ath_dbg(common, ANY, "during WoW we got a BMISS\n");
atomic_inc(&sc->wow_got_bmiss_intr);
atomic_dec(&sc->wow_sleep_proc_intr);
}
ath_dbg(common, INTERRUPT, "beacon miss interrupt\n");
}
#endif
/*
* If a FATAL or RXORN interrupt is received, we have to reset the
* chip immediately.
*/
if ((status & ATH9K_INT_FATAL) || ((status & ATH9K_INT_RXORN) &&
!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)))
goto chip_reset;
if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
(status & ATH9K_INT_BB_WATCHDOG)) {
spin_lock(&common->cc_lock);
ath_hw_cycle_counters_update(common);
ar9003_hw_bb_watchdog_dbg_info(ah);
spin_unlock(&common->cc_lock);
goto chip_reset;
}
if (status & ATH9K_INT_SWBA)
tasklet_schedule(&sc->bcon_tasklet);
if (status & ATH9K_INT_TXURN)
ath9k_hw_updatetxtriglevel(ah, true);
if (status & ATH9K_INT_RXEOL) {
ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
ath9k_hw_set_interrupts(ah);
}
if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
if (status & ATH9K_INT_TIM_TIMER) {
if (ATH_DBG_WARN_ON_ONCE(sc->ps_idle))
goto chip_reset;
/* Clear RxAbort bit so that we can
* receive frames */
ath9k_setpower(sc, ATH9K_PM_AWAKE);
spin_lock(&sc->sc_pm_lock);
ath9k_hw_setrxabort(sc->sc_ah, 0);
sc->ps_flags |= PS_WAIT_FOR_BEACON;
spin_unlock(&sc->sc_pm_lock);
}
chip_reset:
ath_debug_stat_interrupt(sc, status);
if (sched) {
/* turn off every interrupt */
ath9k_hw_disable_interrupts(ah);
tasklet_schedule(&sc->intr_tq);
}
return IRQ_HANDLED;
#undef SCHED_INTR
}
static int ath_reset(struct ath_softc *sc, bool retry_tx)
{
int r;
ath9k_ps_wakeup(sc);
r = ath_reset_internal(sc, NULL, retry_tx);
if (retry_tx) {
int i;
for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
if (ATH_TXQ_SETUP(sc, i)) {
spin_lock_bh(&sc->tx.txq[i].axq_lock);
ath_txq_schedule(sc, &sc->tx.txq[i]);
spin_unlock_bh(&sc->tx.txq[i].axq_lock);
}
}
}
ath9k_ps_restore(sc);
return r;
}
void ath9k_queue_reset(struct ath_softc *sc, enum ath_reset_type type)
{
#ifdef CONFIG_ATH9K_DEBUGFS
RESET_STAT_INC(sc, type);
#endif
set_bit(SC_OP_HW_RESET, &sc->sc_flags);
ieee80211_queue_work(sc->hw, &sc->hw_reset_work);
}
void ath_reset_work(struct work_struct *work)
{
struct ath_softc *sc = container_of(work, struct ath_softc, hw_reset_work);
ath_reset(sc, true);
}
/**********************/
/* mac80211 callbacks */
/**********************/
static int ath9k_start(struct ieee80211_hw *hw)
{
struct ath_softc *sc = hw->priv;
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ieee80211_channel *curchan = hw->conf.channel;
struct ath9k_channel *init_channel;
int r;
ath_dbg(common, CONFIG,
"Starting driver with initial channel: %d MHz\n",
curchan->center_freq);
ath9k_ps_wakeup(sc);
mutex_lock(&sc->mutex);
init_channel = ath9k_cmn_get_curchannel(hw, ah);
/* Reset SERDES registers */
ath9k_hw_configpcipowersave(ah, false);
/*
* The basic interface to setting the hardware in a good
* state is ``reset''. On return the hardware is known to
* be powered up and with interrupts disabled. This must
* be followed by initialization of the appropriate bits
* and then setup of the interrupt mask.
*/
spin_lock_bh(&sc->sc_pcu_lock);
atomic_set(&ah->intr_ref_cnt, -1);
r = ath9k_hw_reset(ah, init_channel, ah->caldata, false);
if (r) {
ath_err(common,
"Unable to reset hardware; reset status %d (freq %u MHz)\n",
r, curchan->center_freq);
spin_unlock_bh(&sc->sc_pcu_lock);
goto mutex_unlock;
}
/* Setup our intr mask. */
ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL |
ATH9K_INT_RXORN | ATH9K_INT_FATAL |
ATH9K_INT_GLOBAL;
if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
ah->imask |= ATH9K_INT_RXHP |
ATH9K_INT_RXLP |
ATH9K_INT_BB_WATCHDOG;
else
ah->imask |= ATH9K_INT_RX;
ah->imask |= ATH9K_INT_GTT;
if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
ah->imask |= ATH9K_INT_CST;
ath_mci_enable(sc);
clear_bit(SC_OP_INVALID, &sc->sc_flags);
sc->sc_ah->is_monitoring = false;
if (!ath_complete_reset(sc, false)) {
r = -EIO;
spin_unlock_bh(&sc->sc_pcu_lock);
goto mutex_unlock;
}
if (ah->led_pin >= 0) {
ath9k_hw_cfg_output(ah, ah->led_pin,
AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
ath9k_hw_set_gpio(ah, ah->led_pin, 0);
}
/*
* Reset key cache to sane defaults (all entries cleared) instead of
* semi-random values after suspend/resume.
*/
ath9k_cmn_init_crypto(sc->sc_ah);
spin_unlock_bh(&sc->sc_pcu_lock);
if (ah->caps.pcie_lcr_extsync_en && common->bus_ops->extn_synch_en)
common->bus_ops->extn_synch_en(common);
mutex_unlock:
mutex_unlock(&sc->mutex);
ath9k_ps_restore(sc);
return r;
}
static void ath9k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
{
struct ath_softc *sc = hw->priv;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ath_tx_control txctl;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
unsigned long flags;
if (sc->ps_enabled) {
/*
* mac80211 does not set PM field for normal data frames, so we
* need to update that based on the current PS mode.
*/
if (ieee80211_is_data(hdr->frame_control) &&
!ieee80211_is_nullfunc(hdr->frame_control) &&
!ieee80211_has_pm(hdr->frame_control)) {
ath_dbg(common, PS,
"Add PM=1 for a TX frame while in PS mode\n");
hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
}
}
if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_NETWORK_SLEEP)) {
/*
* We are using PS-Poll and mac80211 can request TX while in
* power save mode. Need to wake up hardware for the TX to be
* completed and if needed, also for RX of buffered frames.
*/
ath9k_ps_wakeup(sc);
spin_lock_irqsave(&sc->sc_pm_lock, flags);
if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
ath9k_hw_setrxabort(sc->sc_ah, 0);
if (ieee80211_is_pspoll(hdr->frame_control)) {
ath_dbg(common, PS,
"Sending PS-Poll to pick a buffered frame\n");
sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
} else {
ath_dbg(common, PS, "Wake up to complete TX\n");
sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
}
/*
* The actual restore operation will happen only after
* the ps_flags bit is cleared. We are just dropping
* the ps_usecount here.
*/
spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
ath9k_ps_restore(sc);
}
/*
* Cannot tx while the hardware is in full sleep, it first needs a full
* chip reset to recover from that
*/
if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_FULL_SLEEP)) {
ath_err(common, "TX while HW is in FULL_SLEEP mode\n");
goto exit;
}
memset(&txctl, 0, sizeof(struct ath_tx_control));
txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)];
ath_dbg(common, XMIT, "transmitting packet, skb: %p\n", skb);
if (ath_tx_start(hw, skb, &txctl) != 0) {
ath_dbg(common, XMIT, "TX failed\n");
TX_STAT_INC(txctl.txq->axq_qnum, txfailed);
goto exit;
}
return;
exit:
dev_kfree_skb_any(skb);
}
static void ath9k_stop(struct ieee80211_hw *hw)
{
struct ath_softc *sc = hw->priv;
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
bool prev_idle;
mutex_lock(&sc->mutex);
ath_cancel_work(sc);
del_timer_sync(&sc->rx_poll_timer);
if (test_bit(SC_OP_INVALID, &sc->sc_flags)) {
ath_dbg(common, ANY, "Device not present\n");
mutex_unlock(&sc->mutex);
return;
}
/* Ensure HW is awake when we try to shut it down. */
ath9k_ps_wakeup(sc);
spin_lock_bh(&sc->sc_pcu_lock);
/* prevent tasklets to enable interrupts once we disable them */
ah->imask &= ~ATH9K_INT_GLOBAL;
/* make sure h/w will not generate any interrupt
* before setting the invalid flag. */
ath9k_hw_disable_interrupts(ah);
spin_unlock_bh(&sc->sc_pcu_lock);
/* we can now sync irq and kill any running tasklets, since we already
* disabled interrupts and not holding a spin lock */
synchronize_irq(sc->irq);
tasklet_kill(&sc->intr_tq);
tasklet_kill(&sc->bcon_tasklet);
prev_idle = sc->ps_idle;
sc->ps_idle = true;
spin_lock_bh(&sc->sc_pcu_lock);
if (ah->led_pin >= 0) {
ath9k_hw_set_gpio(ah, ah->led_pin, 1);
ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
}
ath_prepare_reset(sc, false, true);
if (sc->rx.frag) {
dev_kfree_skb_any(sc->rx.frag);
sc->rx.frag = NULL;
}
if (!ah->curchan)
ah->curchan = ath9k_cmn_get_curchannel(hw, ah);
ath9k_hw_reset(ah, ah->curchan, ah->caldata, false);
ath9k_hw_phy_disable(ah);
ath9k_hw_configpcipowersave(ah, true);
spin_unlock_bh(&sc->sc_pcu_lock);
ath9k_ps_restore(sc);
set_bit(SC_OP_INVALID, &sc->sc_flags);
sc->ps_idle = prev_idle;
mutex_unlock(&sc->mutex);
ath_dbg(common, CONFIG, "Driver halt\n");
}
bool ath9k_uses_beacons(int type)
{
switch (type) {
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_ADHOC:
case NL80211_IFTYPE_MESH_POINT:
return true;
default:
return false;
}
}
static void ath9k_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
{
struct ath9k_vif_iter_data *iter_data = data;
int i;
if (iter_data->hw_macaddr)
for (i = 0; i < ETH_ALEN; i++)
iter_data->mask[i] &=
~(iter_data->hw_macaddr[i] ^ mac[i]);
switch (vif->type) {
case NL80211_IFTYPE_AP:
iter_data->naps++;
break;
case NL80211_IFTYPE_STATION:
iter_data->nstations++;
break;
case NL80211_IFTYPE_ADHOC:
iter_data->nadhocs++;
break;
case NL80211_IFTYPE_MESH_POINT:
iter_data->nmeshes++;
break;
case NL80211_IFTYPE_WDS:
iter_data->nwds++;
break;
default:
break;
}
}
static void ath9k_sta_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
{
struct ath_softc *sc = data;
struct ath_vif *avp = (void *)vif->drv_priv;
if (vif->type != NL80211_IFTYPE_STATION)
return;
if (avp->primary_sta_vif)
ath9k_set_assoc_state(sc, vif);
}
/* Called with sc->mutex held. */
void ath9k_calculate_iter_data(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ath9k_vif_iter_data *iter_data)
{
struct ath_softc *sc = hw->priv;
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
/*
* Use the hardware MAC address as reference, the hardware uses it
* together with the BSSID mask when matching addresses.
*/
memset(iter_data, 0, sizeof(*iter_data));
iter_data->hw_macaddr = common->macaddr;
memset(&iter_data->mask, 0xff, ETH_ALEN);
if (vif)
ath9k_vif_iter(iter_data, vif->addr, vif);
/* Get list of all active MAC addresses */
ieee80211_iterate_active_interfaces_atomic(sc->hw, ath9k_vif_iter,
iter_data);
}
/* Called with sc->mutex held. */
static void ath9k_calculate_summary_state(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct ath_softc *sc = hw->priv;
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ath9k_vif_iter_data iter_data;
enum nl80211_iftype old_opmode = ah->opmode;
ath9k_calculate_iter_data(hw, vif, &iter_data);
memcpy(common->bssidmask, iter_data.mask, ETH_ALEN);
ath_hw_setbssidmask(common);
if (iter_data.naps > 0) {
ath9k_hw_set_tsfadjust(ah, true);
ah->opmode = NL80211_IFTYPE_AP;
} else {
ath9k_hw_set_tsfadjust(ah, false);
if (iter_data.nmeshes)
ah->opmode = NL80211_IFTYPE_MESH_POINT;
else if (iter_data.nwds)
ah->opmode = NL80211_IFTYPE_AP;
else if (iter_data.nadhocs)
ah->opmode = NL80211_IFTYPE_ADHOC;
else
ah->opmode = NL80211_IFTYPE_STATION;
}
ath9k_hw_setopmode(ah);
if ((iter_data.nstations + iter_data.nadhocs + iter_data.nmeshes) > 0)
ah->imask |= ATH9K_INT_TSFOOR;
else
ah->imask &= ~ATH9K_INT_TSFOOR;
ath9k_hw_set_interrupts(ah);
/*
* If we are changing the opmode to STATION,
* a beacon sync needs to be done.
*/
if (ah->opmode == NL80211_IFTYPE_STATION &&
old_opmode == NL80211_IFTYPE_AP &&
test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags)) {
ieee80211_iterate_active_interfaces_atomic(sc->hw,
ath9k_sta_vif_iter, sc);
}
}
static int ath9k_add_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct ath_softc *sc = hw->priv;
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
int ret = 0;
ath9k_ps_wakeup(sc);
mutex_lock(&sc->mutex);
switch (vif->type) {
case NL80211_IFTYPE_STATION:
case NL80211_IFTYPE_WDS:
case NL80211_IFTYPE_ADHOC:
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_MESH_POINT:
break;
default:
ath_err(common, "Interface type %d not yet supported\n",
vif->type);
ret = -EOPNOTSUPP;
goto out;
}
if (ath9k_uses_beacons(vif->type)) {
if (sc->nbcnvifs >= ATH_BCBUF) {
ath_err(common, "Not enough beacon buffers when adding"
" new interface of type: %i\n",
vif->type);
ret = -ENOBUFS;
goto out;
}
}
ath_dbg(common, CONFIG, "Attach a VIF of type: %d\n", vif->type);
sc->nvifs++;
ath9k_calculate_summary_state(hw, vif);
if (ath9k_uses_beacons(vif->type))
ath9k_beacon_assign_slot(sc, vif);
out:
mutex_unlock(&sc->mutex);
ath9k_ps_restore(sc);
return ret;
}
static int ath9k_change_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
enum nl80211_iftype new_type,
bool p2p)
{
struct ath_softc *sc = hw->priv;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
int ret = 0;
ath_dbg(common, CONFIG, "Change Interface\n");
mutex_lock(&sc->mutex);
ath9k_ps_wakeup(sc);
if (ath9k_uses_beacons(new_type) &&
!ath9k_uses_beacons(vif->type)) {
if (sc->nbcnvifs >= ATH_BCBUF) {
ath_err(common, "No beacon slot available\n");
ret = -ENOBUFS;
goto out;
}
}
if (ath9k_uses_beacons(vif->type))
ath9k_beacon_remove_slot(sc, vif);
vif->type = new_type;
vif->p2p = p2p;
ath9k_calculate_summary_state(hw, vif);
if (ath9k_uses_beacons(vif->type))
ath9k_beacon_assign_slot(sc, vif);
out:
ath9k_ps_restore(sc);
mutex_unlock(&sc->mutex);
return ret;
}
static void ath9k_remove_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct ath_softc *sc = hw->priv;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
ath_dbg(common, CONFIG, "Detach Interface\n");
ath9k_ps_wakeup(sc);
mutex_lock(&sc->mutex);
sc->nvifs--;
if (ath9k_uses_beacons(vif->type))
ath9k_beacon_remove_slot(sc, vif);
ath9k_calculate_summary_state(hw, NULL);
mutex_unlock(&sc->mutex);
ath9k_ps_restore(sc);
}
static void ath9k_enable_ps(struct ath_softc *sc)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
sc->ps_enabled = true;
if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) {
ah->imask |= ATH9K_INT_TIM_TIMER;
ath9k_hw_set_interrupts(ah);
}
ath9k_hw_setrxabort(ah, 1);
}
ath_dbg(common, PS, "PowerSave enabled\n");
}
static void ath9k_disable_ps(struct ath_softc *sc)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
sc->ps_enabled = false;
ath9k_hw_setpower(ah, ATH9K_PM_AWAKE);
if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) {
ath9k_hw_setrxabort(ah, 0);
sc->ps_flags &= ~(PS_WAIT_FOR_BEACON |
PS_WAIT_FOR_CAB |
PS_WAIT_FOR_PSPOLL_DATA |
PS_WAIT_FOR_TX_ACK);
if (ah->imask & ATH9K_INT_TIM_TIMER) {
ah->imask &= ~ATH9K_INT_TIM_TIMER;
ath9k_hw_set_interrupts(ah);
}
}
ath_dbg(common, PS, "PowerSave disabled\n");
}
static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
{
struct ath_softc *sc = hw->priv;
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ieee80211_conf *conf = &hw->conf;
bool reset_channel = false;
ath9k_ps_wakeup(sc);
mutex_lock(&sc->mutex);
if (changed & IEEE80211_CONF_CHANGE_IDLE) {
sc->ps_idle = !!(conf->flags & IEEE80211_CONF_IDLE);
if (sc->ps_idle) {
ath_cancel_work(sc);
ath9k_stop_btcoex(sc);
} else {
ath9k_start_btcoex(sc);
/*
* The chip needs a reset to properly wake up from
* full sleep
*/
reset_channel = ah->chip_fullsleep;
}
}
/*
* We just prepare to enable PS. We have to wait until our AP has
* ACK'd our null data frame to disable RX otherwise we'll ignore
* those ACKs and end up retransmitting the same null data frames.
* IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode.
*/
if (changed & IEEE80211_CONF_CHANGE_PS) {
unsigned long flags;
spin_lock_irqsave(&sc->sc_pm_lock, flags);
if (conf->flags & IEEE80211_CONF_PS)
ath9k_enable_ps(sc);
else
ath9k_disable_ps(sc);
spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
}
if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
if (conf->flags & IEEE80211_CONF_MONITOR) {
ath_dbg(common, CONFIG, "Monitor mode is enabled\n");
sc->sc_ah->is_monitoring = true;
} else {
ath_dbg(common, CONFIG, "Monitor mode is disabled\n");
sc->sc_ah->is_monitoring = false;
}
}
if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) || reset_channel) {
struct ieee80211_channel *curchan = hw->conf.channel;
int pos = curchan->hw_value;
int old_pos = -1;
unsigned long flags;
if (ah->curchan)
old_pos = ah->curchan - &ah->channels[0];
ath_dbg(common, CONFIG, "Set channel: %d MHz type: %d\n",
curchan->center_freq, conf->channel_type);
/* update survey stats for the old channel before switching */
spin_lock_irqsave(&common->cc_lock, flags);
ath_update_survey_stats(sc);
spin_unlock_irqrestore(&common->cc_lock, flags);
/*
* Preserve the current channel values, before updating
* the same channel
*/
if (ah->curchan && (old_pos == pos))
ath9k_hw_getnf(ah, ah->curchan);
ath9k_cmn_update_ichannel(&sc->sc_ah->channels[pos],
curchan, conf->channel_type);
/*
* If the operating channel changes, change the survey in-use flags
* along with it.
* Reset the survey data for the new channel, unless we're switching
* back to the operating channel from an off-channel operation.
*/
if (!(hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) &&
sc->cur_survey != &sc->survey[pos]) {
if (sc->cur_survey)
sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE;
sc->cur_survey = &sc->survey[pos];
memset(sc->cur_survey, 0, sizeof(struct survey_info));
sc->cur_survey->filled |= SURVEY_INFO_IN_USE;
} else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) {
memset(&sc->survey[pos], 0, sizeof(struct survey_info));
}
if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
ath_err(common, "Unable to set channel\n");
mutex_unlock(&sc->mutex);
ath9k_ps_restore(sc);
return -EINVAL;
}
/*
* The most recent snapshot of channel->noisefloor for the old
* channel is only available after the hardware reset. Copy it to
* the survey stats now.
*/
if (old_pos >= 0)
ath_update_survey_nf(sc, old_pos);
}
if (changed & IEEE80211_CONF_CHANGE_POWER) {
ath_dbg(common, CONFIG, "Set power: %d\n", conf->power_level);
sc->config.txpowlimit = 2 * conf->power_level;
ath9k_cmn_update_txpow(ah, sc->curtxpow,
sc->config.txpowlimit, &sc->curtxpow);
}
mutex_unlock(&sc->mutex);
ath9k_ps_restore(sc);
return 0;
}
#define SUPPORTED_FILTERS \
(FIF_PROMISC_IN_BSS | \
FIF_ALLMULTI | \
FIF_CONTROL | \
FIF_PSPOLL | \
FIF_OTHER_BSS | \
FIF_BCN_PRBRESP_PROMISC | \
FIF_PROBE_REQ | \
FIF_FCSFAIL)
/* FIXME: sc->sc_full_reset ? */
static void ath9k_configure_filter(struct ieee80211_hw *hw,
unsigned int changed_flags,
unsigned int *total_flags,
u64 multicast)
{
struct ath_softc *sc = hw->priv;
u32 rfilt;
changed_flags &= SUPPORTED_FILTERS;
*total_flags &= SUPPORTED_FILTERS;
sc->rx.rxfilter = *total_flags;
ath9k_ps_wakeup(sc);
rfilt = ath_calcrxfilter(sc);
ath9k_hw_setrxfilter(sc->sc_ah, rfilt);
ath9k_ps_restore(sc);
ath_dbg(ath9k_hw_common(sc->sc_ah), CONFIG, "Set HW RX filter: 0x%x\n",
rfilt);
}
static int ath9k_sta_add(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta)
{
struct ath_softc *sc = hw->priv;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ath_node *an = (struct ath_node *) sta->drv_priv;
struct ieee80211_key_conf ps_key = { };
ath_node_attach(sc, sta, vif);
if (vif->type != NL80211_IFTYPE_AP &&
vif->type != NL80211_IFTYPE_AP_VLAN)
return 0;
an->ps_key = ath_key_config(common, vif, sta, &ps_key);
return 0;
}
static void ath9k_del_ps_key(struct ath_softc *sc,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta)
{
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ath_node *an = (struct ath_node *) sta->drv_priv;
struct ieee80211_key_conf ps_key = { .hw_key_idx = an->ps_key };
if (!an->ps_key)
return;
ath_key_delete(common, &ps_key);
}
static int ath9k_sta_remove(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta)
{
struct ath_softc *sc = hw->priv;
ath9k_del_ps_key(sc, vif, sta);
ath_node_detach(sc, sta);
return 0;
}
static void ath9k_sta_notify(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
enum sta_notify_cmd cmd,
struct ieee80211_sta *sta)
{
struct ath_softc *sc = hw->priv;
struct ath_node *an = (struct ath_node *) sta->drv_priv;
if (!sta->ht_cap.ht_supported)
return;
switch (cmd) {
case STA_NOTIFY_SLEEP:
an->sleeping = true;
ath_tx_aggr_sleep(sta, sc, an);
break;
case STA_NOTIFY_AWAKE:
an->sleeping = false;
ath_tx_aggr_wakeup(sc, an);
break;
}
}
static int ath9k_conf_tx(struct ieee80211_hw *hw,
struct ieee80211_vif *vif, u16 queue,
const struct ieee80211_tx_queue_params *params)
{
struct ath_softc *sc = hw->priv;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ath_txq *txq;
struct ath9k_tx_queue_info qi;
int ret = 0;
if (queue >= WME_NUM_AC)
return 0;
txq = sc->tx.txq_map[queue];
ath9k_ps_wakeup(sc);
mutex_lock(&sc->mutex);
memset(&qi, 0, sizeof(struct ath9k_tx_queue_info));
qi.tqi_aifs = params->aifs;
qi.tqi_cwmin = params->cw_min;
qi.tqi_cwmax = params->cw_max;
qi.tqi_burstTime = params->txop * 32;
ath_dbg(common, CONFIG,
"Configure tx [queue/halq] [%d/%d], aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
queue, txq->axq_qnum, params->aifs, params->cw_min,
params->cw_max, params->txop);
ath_update_max_aggr_framelen(sc, queue, qi.tqi_burstTime);
ret = ath_txq_update(sc, txq->axq_qnum, &qi);
if (ret)
ath_err(common, "TXQ Update failed\n");
mutex_unlock(&sc->mutex);
ath9k_ps_restore(sc);
return ret;
}
static int ath9k_set_key(struct ieee80211_hw *hw,
enum set_key_cmd cmd,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta,
struct ieee80211_key_conf *key)
{
struct ath_softc *sc = hw->priv;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
int ret = 0;
if (ath9k_modparam_nohwcrypt)
return -ENOSPC;
if ((vif->type == NL80211_IFTYPE_ADHOC ||
vif->type == NL80211_IFTYPE_MESH_POINT) &&
(key->cipher == WLAN_CIPHER_SUITE_TKIP ||
key->cipher == WLAN_CIPHER_SUITE_CCMP) &&
!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
/*
* For now, disable hw crypto for the RSN IBSS group keys. This
* could be optimized in the future to use a modified key cache
* design to support per-STA RX GTK, but until that gets
* implemented, use of software crypto for group addressed
* frames is a acceptable to allow RSN IBSS to be used.
*/
return -EOPNOTSUPP;
}
mutex_lock(&sc->mutex);
ath9k_ps_wakeup(sc);
ath_dbg(common, CONFIG, "Set HW Key\n");
switch (cmd) {
case SET_KEY:
if (sta)
ath9k_del_ps_key(sc, vif, sta);
ret = ath_key_config(common, vif, sta, key);
if (ret >= 0) {
key->hw_key_idx = ret;
/* push IV and Michael MIC generation to stack */
key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
if (sc->sc_ah->sw_mgmt_crypto &&
key->cipher == WLAN_CIPHER_SUITE_CCMP)
key->flags |= IEEE80211_KEY_FLAG_SW_MGMT;
ret = 0;
}
break;
case DISABLE_KEY:
ath_key_delete(common, key);
break;
default:
ret = -EINVAL;
}
ath9k_ps_restore(sc);
mutex_unlock(&sc->mutex);
return ret;
}
static void ath9k_set_assoc_state(struct ath_softc *sc,
struct ieee80211_vif *vif)
{
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ath_vif *avp = (void *)vif->drv_priv;
struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
unsigned long flags;
set_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags);
avp->primary_sta_vif = true;
/*
* Set the AID, BSSID and do beacon-sync only when
* the HW opmode is STATION.
*
* But the primary bit is set above in any case.
*/
if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION)
return;
memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
common->curaid = bss_conf->aid;
ath9k_hw_write_associd(sc->sc_ah);
sc->last_rssi = ATH_RSSI_DUMMY_MARKER;
sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
spin_lock_irqsave(&sc->sc_pm_lock, flags);
sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
ath_dbg(common, CONFIG,
"Primary Station interface: %pM, BSSID: %pM\n",
vif->addr, common->curbssid);
}
static void ath9k_bss_assoc_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
{
struct ath_softc *sc = data;
struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
if (test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags))
return;
if (bss_conf->assoc)
ath9k_set_assoc_state(sc, vif);
}
static void ath9k_bss_info_changed(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_bss_conf *bss_conf,
u32 changed)
{
#define CHECK_ANI \
(BSS_CHANGED_ASSOC | \
BSS_CHANGED_IBSS | \
BSS_CHANGED_BEACON_ENABLED)
struct ath_softc *sc = hw->priv;
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ath_vif *avp = (void *)vif->drv_priv;
int slottime;
ath9k_ps_wakeup(sc);
mutex_lock(&sc->mutex);
if (changed & BSS_CHANGED_ASSOC) {
ath_dbg(common, CONFIG, "BSSID %pM Changed ASSOC %d\n",
bss_conf->bssid, bss_conf->assoc);
if (avp->primary_sta_vif && !bss_conf->assoc) {
clear_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags);
avp->primary_sta_vif = false;
if (ah->opmode == NL80211_IFTYPE_STATION)
clear_bit(SC_OP_BEACONS, &sc->sc_flags);
}
ieee80211_iterate_active_interfaces_atomic(sc->hw,
ath9k_bss_assoc_iter, sc);
if (!test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags) &&
ah->opmode == NL80211_IFTYPE_STATION) {
memset(common->curbssid, 0, ETH_ALEN);
common->curaid = 0;
ath9k_hw_write_associd(sc->sc_ah);
}
}
if (changed & BSS_CHANGED_IBSS) {
memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
common->curaid = bss_conf->aid;
ath9k_hw_write_associd(sc->sc_ah);
}
if ((changed & BSS_CHANGED_BEACON_ENABLED) ||
(changed & BSS_CHANGED_BEACON_INT)) {
if (ah->opmode == NL80211_IFTYPE_AP &&
bss_conf->enable_beacon)
ath9k_set_tsfadjust(sc, vif);
if (ath9k_allow_beacon_config(sc, vif))
ath9k_beacon_config(sc, vif, changed);
}
if (changed & BSS_CHANGED_ERP_SLOT) {
if (bss_conf->use_short_slot)
slottime = 9;
else
slottime = 20;
if (vif->type == NL80211_IFTYPE_AP) {
/*
* Defer update, so that connected stations can adjust
* their settings at the same time.
* See beacon.c for more details
*/
sc->beacon.slottime = slottime;
sc->beacon.updateslot = UPDATE;
} else {
ah->slottime = slottime;
ath9k_hw_init_global_settings(ah);
}
}
if (changed & CHECK_ANI)
ath_check_ani(sc);
mutex_unlock(&sc->mutex);
ath9k_ps_restore(sc);
#undef CHECK_ANI
}
static u64 ath9k_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
{
struct ath_softc *sc = hw->priv;
u64 tsf;
mutex_lock(&sc->mutex);
ath9k_ps_wakeup(sc);
tsf = ath9k_hw_gettsf64(sc->sc_ah);
ath9k_ps_restore(sc);
mutex_unlock(&sc->mutex);
return tsf;
}
static void ath9k_set_tsf(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
u64 tsf)
{
struct ath_softc *sc = hw->priv;
mutex_lock(&sc->mutex);
ath9k_ps_wakeup(sc);
ath9k_hw_settsf64(sc->sc_ah, tsf);
ath9k_ps_restore(sc);
mutex_unlock(&sc->mutex);
}
static void ath9k_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
{
struct ath_softc *sc = hw->priv;
mutex_lock(&sc->mutex);
ath9k_ps_wakeup(sc);
ath9k_hw_reset_tsf(sc->sc_ah);
ath9k_ps_restore(sc);
mutex_unlock(&sc->mutex);
}
static int ath9k_ampdu_action(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
enum ieee80211_ampdu_mlme_action action,
struct ieee80211_sta *sta,
u16 tid, u16 *ssn, u8 buf_size)
{
struct ath_softc *sc = hw->priv;
int ret = 0;
local_bh_disable();
switch (action) {
case IEEE80211_AMPDU_RX_START:
break;
case IEEE80211_AMPDU_RX_STOP:
break;
case IEEE80211_AMPDU_TX_START:
ath9k_ps_wakeup(sc);
ret = ath_tx_aggr_start(sc, sta, tid, ssn);
if (!ret)
ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
ath9k_ps_restore(sc);
break;
case IEEE80211_AMPDU_TX_STOP:
ath9k_ps_wakeup(sc);
ath_tx_aggr_stop(sc, sta, tid);
ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
ath9k_ps_restore(sc);
break;
case IEEE80211_AMPDU_TX_OPERATIONAL:
ath9k_ps_wakeup(sc);
ath_tx_aggr_resume(sc, sta, tid);
ath9k_ps_restore(sc);
break;
default:
ath_err(ath9k_hw_common(sc->sc_ah), "Unknown AMPDU action\n");
}
local_bh_enable();
return ret;
}
static int ath9k_get_survey(struct ieee80211_hw *hw, int idx,
struct survey_info *survey)
{
struct ath_softc *sc = hw->priv;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ieee80211_supported_band *sband;
struct ieee80211_channel *chan;
unsigned long flags;
int pos;
spin_lock_irqsave(&common->cc_lock, flags);
if (idx == 0)
ath_update_survey_stats(sc);
sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ];
if (sband && idx >= sband->n_channels) {
idx -= sband->n_channels;
sband = NULL;
}
if (!sband)
sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ];
if (!sband || idx >= sband->n_channels) {
spin_unlock_irqrestore(&common->cc_lock, flags);
return -ENOENT;
}
chan = &sband->channels[idx];
pos = chan->hw_value;
memcpy(survey, &sc->survey[pos], sizeof(*survey));
survey->channel = chan;
spin_unlock_irqrestore(&common->cc_lock, flags);
return 0;
}
static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
{
struct ath_softc *sc = hw->priv;
struct ath_hw *ah = sc->sc_ah;
mutex_lock(&sc->mutex);
ah->coverage_class = coverage_class;
ath9k_ps_wakeup(sc);
ath9k_hw_init_global_settings(ah);
ath9k_ps_restore(sc);
mutex_unlock(&sc->mutex);
}
static void ath9k_flush(struct ieee80211_hw *hw, bool drop)
{
struct ath_softc *sc = hw->priv;
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
int timeout = 200; /* ms */
int i, j;
bool drain_txq;
mutex_lock(&sc->mutex);
cancel_delayed_work_sync(&sc->tx_complete_work);
if (ah->ah_flags & AH_UNPLUGGED) {
ath_dbg(common, ANY, "Device has been unplugged!\n");
mutex_unlock(&sc->mutex);
return;
}
if (test_bit(SC_OP_INVALID, &sc->sc_flags)) {
ath_dbg(common, ANY, "Device not present\n");
mutex_unlock(&sc->mutex);
return;
}
for (j = 0; j < timeout; j++) {
bool npend = false;
if (j)
usleep_range(1000, 2000);
for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
if (!ATH_TXQ_SETUP(sc, i))
continue;
npend = ath9k_has_pending_frames(sc, &sc->tx.txq[i]);
if (npend)
break;
}
if (!npend)
break;
}
if (drop) {
ath9k_ps_wakeup(sc);
spin_lock_bh(&sc->sc_pcu_lock);
drain_txq = ath_drain_all_txq(sc, false);
spin_unlock_bh(&sc->sc_pcu_lock);
if (!drain_txq)
ath_reset(sc, false);
ath9k_ps_restore(sc);
ieee80211_wake_queues(hw);
}
ieee80211_queue_delayed_work(hw, &sc->tx_complete_work, 0);
mutex_unlock(&sc->mutex);
}
static bool ath9k_tx_frames_pending(struct ieee80211_hw *hw)
{
struct ath_softc *sc = hw->priv;
int i;
for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
if (!ATH_TXQ_SETUP(sc, i))
continue;
if (ath9k_has_pending_frames(sc, &sc->tx.txq[i]))
return true;
}
return false;
}
static int ath9k_tx_last_beacon(struct ieee80211_hw *hw)
{
struct ath_softc *sc = hw->priv;
struct ath_hw *ah = sc->sc_ah;
struct ieee80211_vif *vif;
struct ath_vif *avp;
struct ath_buf *bf;
struct ath_tx_status ts;
bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA);
int status;
vif = sc->beacon.bslot[0];
if (!vif)
return 0;
if (!vif->bss_conf.enable_beacon)
return 0;
avp = (void *)vif->drv_priv;
if (!sc->beacon.tx_processed && !edma) {
tasklet_disable(&sc->bcon_tasklet);
bf = avp->av_bcbuf;
if (!bf || !bf->bf_mpdu)
goto skip;
status = ath9k_hw_txprocdesc(ah, bf->bf_desc, &ts);
if (status == -EINPROGRESS)
goto skip;
sc->beacon.tx_processed = true;
sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK);
skip:
tasklet_enable(&sc->bcon_tasklet);
}
return sc->beacon.tx_last;
}
static int ath9k_get_stats(struct ieee80211_hw *hw,
struct ieee80211_low_level_stats *stats)
{
struct ath_softc *sc = hw->priv;
struct ath_hw *ah = sc->sc_ah;
struct ath9k_mib_stats *mib_stats = &ah->ah_mibStats;
stats->dot11ACKFailureCount = mib_stats->ackrcv_bad;
stats->dot11RTSFailureCount = mib_stats->rts_bad;
stats->dot11FCSErrorCount = mib_stats->fcs_bad;
stats->dot11RTSSuccessCount = mib_stats->rts_good;
return 0;
}
static u32 fill_chainmask(u32 cap, u32 new)
{
u32 filled = 0;
int i;
for (i = 0; cap && new; i++, cap >>= 1) {
if (!(cap & BIT(0)))
continue;
if (new & BIT(0))
filled |= BIT(i);
new >>= 1;
}
return filled;
}
static bool validate_antenna_mask(struct ath_hw *ah, u32 val)
{
switch (val & 0x7) {
case 0x1:
case 0x3:
case 0x7:
return true;
case 0x2:
return (ah->caps.rx_chainmask == 1);
default:
return false;
}
}
static int ath9k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant)
{
struct ath_softc *sc = hw->priv;
struct ath_hw *ah = sc->sc_ah;
if (ah->caps.rx_chainmask != 1)
rx_ant |= tx_ant;
if (!validate_antenna_mask(ah, rx_ant) || !tx_ant)
return -EINVAL;
sc->ant_rx = rx_ant;
sc->ant_tx = tx_ant;
if (ah->caps.rx_chainmask == 1)
return 0;
/* AR9100 runs into calibration issues if not all rx chains are enabled */
if (AR_SREV_9100(ah))
ah->rxchainmask = 0x7;
else
ah->rxchainmask = fill_chainmask(ah->caps.rx_chainmask, rx_ant);
ah->txchainmask = fill_chainmask(ah->caps.tx_chainmask, tx_ant);
ath9k_reload_chainmask_settings(sc);
return 0;
}
static int ath9k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant)
{
struct ath_softc *sc = hw->priv;
*tx_ant = sc->ant_tx;
*rx_ant = sc->ant_rx;
return 0;
}
#ifdef CONFIG_ATH9K_DEBUGFS
/* Ethtool support for get-stats */
#define AMKSTR(nm) #nm "_BE", #nm "_BK", #nm "_VI", #nm "_VO"
static const char ath9k_gstrings_stats[][ETH_GSTRING_LEN] = {
"tx_pkts_nic",
"tx_bytes_nic",
"rx_pkts_nic",
"rx_bytes_nic",
AMKSTR(d_tx_pkts),
AMKSTR(d_tx_bytes),
AMKSTR(d_tx_mpdus_queued),
AMKSTR(d_tx_mpdus_completed),
AMKSTR(d_tx_mpdu_xretries),
AMKSTR(d_tx_aggregates),
AMKSTR(d_tx_ampdus_queued_hw),
AMKSTR(d_tx_ampdus_queued_sw),
AMKSTR(d_tx_ampdus_completed),
AMKSTR(d_tx_ampdu_retries),
AMKSTR(d_tx_ampdu_xretries),
AMKSTR(d_tx_fifo_underrun),
AMKSTR(d_tx_op_exceeded),
AMKSTR(d_tx_timer_expiry),
AMKSTR(d_tx_desc_cfg_err),
AMKSTR(d_tx_data_underrun),
AMKSTR(d_tx_delim_underrun),
"d_rx_decrypt_crc_err",
"d_rx_phy_err",
"d_rx_mic_err",
"d_rx_pre_delim_crc_err",
"d_rx_post_delim_crc_err",
"d_rx_decrypt_busy_err",
"d_rx_phyerr_radar",
"d_rx_phyerr_ofdm_timing",
"d_rx_phyerr_cck_timing",
};
#define ATH9K_SSTATS_LEN ARRAY_SIZE(ath9k_gstrings_stats)
static void ath9k_get_et_strings(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
u32 sset, u8 *data)
{
if (sset == ETH_SS_STATS)
memcpy(data, *ath9k_gstrings_stats,
sizeof(ath9k_gstrings_stats));
}
static int ath9k_get_et_sset_count(struct ieee80211_hw *hw,
struct ieee80211_vif *vif, int sset)
{
if (sset == ETH_SS_STATS)
return ATH9K_SSTATS_LEN;
return 0;
}
#define PR_QNUM(_n) (sc->tx.txq_map[_n]->axq_qnum)
#define AWDATA(elem) \
do { \
data[i++] = sc->debug.stats.txstats[PR_QNUM(WME_AC_BE)].elem; \
data[i++] = sc->debug.stats.txstats[PR_QNUM(WME_AC_BK)].elem; \
data[i++] = sc->debug.stats.txstats[PR_QNUM(WME_AC_VI)].elem; \
data[i++] = sc->debug.stats.txstats[PR_QNUM(WME_AC_VO)].elem; \
} while (0)
#define AWDATA_RX(elem) \
do { \
data[i++] = sc->debug.stats.rxstats.elem; \
} while (0)
static void ath9k_get_et_stats(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ethtool_stats *stats, u64 *data)
{
struct ath_softc *sc = hw->priv;
int i = 0;
data[i++] = (sc->debug.stats.txstats[PR_QNUM(WME_AC_BE)].tx_pkts_all +
sc->debug.stats.txstats[PR_QNUM(WME_AC_BK)].tx_pkts_all +
sc->debug.stats.txstats[PR_QNUM(WME_AC_VI)].tx_pkts_all +
sc->debug.stats.txstats[PR_QNUM(WME_AC_VO)].tx_pkts_all);
data[i++] = (sc->debug.stats.txstats[PR_QNUM(WME_AC_BE)].tx_bytes_all +
sc->debug.stats.txstats[PR_QNUM(WME_AC_BK)].tx_bytes_all +
sc->debug.stats.txstats[PR_QNUM(WME_AC_VI)].tx_bytes_all +
sc->debug.stats.txstats[PR_QNUM(WME_AC_VO)].tx_bytes_all);
AWDATA_RX(rx_pkts_all);
AWDATA_RX(rx_bytes_all);
AWDATA(tx_pkts_all);
AWDATA(tx_bytes_all);
AWDATA(queued);
AWDATA(completed);
AWDATA(xretries);
AWDATA(a_aggr);
AWDATA(a_queued_hw);
AWDATA(a_queued_sw);
AWDATA(a_completed);
AWDATA(a_retries);
AWDATA(a_xretries);
AWDATA(fifo_underrun);
AWDATA(xtxop);
AWDATA(timer_exp);
AWDATA(desc_cfg_err);
AWDATA(data_underrun);
AWDATA(delim_underrun);
AWDATA_RX(decrypt_crc_err);
AWDATA_RX(phy_err);
AWDATA_RX(mic_err);
AWDATA_RX(pre_delim_crc_err);
AWDATA_RX(post_delim_crc_err);
AWDATA_RX(decrypt_busy_err);
AWDATA_RX(phy_err_stats[ATH9K_PHYERR_RADAR]);
AWDATA_RX(phy_err_stats[ATH9K_PHYERR_OFDM_TIMING]);
AWDATA_RX(phy_err_stats[ATH9K_PHYERR_CCK_TIMING]);
WARN_ON(i != ATH9K_SSTATS_LEN);
}
/* End of ethtool get-stats functions */
#endif
#ifdef CONFIG_PM_SLEEP
static void ath9k_wow_map_triggers(struct ath_softc *sc,
struct cfg80211_wowlan *wowlan,
u32 *wow_triggers)
{
if (wowlan->disconnect)
*wow_triggers |= AH_WOW_LINK_CHANGE |
AH_WOW_BEACON_MISS;
if (wowlan->magic_pkt)
*wow_triggers |= AH_WOW_MAGIC_PATTERN_EN;
if (wowlan->n_patterns)
*wow_triggers |= AH_WOW_USER_PATTERN_EN;
sc->wow_enabled = *wow_triggers;
}
static void ath9k_wow_add_disassoc_deauth_pattern(struct ath_softc *sc)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ath9k_hw_capabilities *pcaps = &ah->caps;
int pattern_count = 0;
int i, byte_cnt;
u8 dis_deauth_pattern[MAX_PATTERN_SIZE];
u8 dis_deauth_mask[MAX_PATTERN_SIZE];
memset(dis_deauth_pattern, 0, MAX_PATTERN_SIZE);
memset(dis_deauth_mask, 0, MAX_PATTERN_SIZE);
/*
* Create Dissassociate / Deauthenticate packet filter
*
* 2 bytes 2 byte 6 bytes 6 bytes 6 bytes
* +--------------+----------+---------+--------+--------+----
* + Frame Control+ Duration + DA + SA + BSSID +
* +--------------+----------+---------+--------+--------+----
*
* The above is the management frame format for disassociate/
* deauthenticate pattern, from this we need to match the first byte
* of 'Frame Control' and DA, SA, and BSSID fields
* (skipping 2nd byte of FC and Duration feild.
*
* Disassociate pattern
* --------------------
* Frame control = 00 00 1010
* DA, SA, BSSID = x:x:x:x:x:x
* Pattern will be A0000000 | x:x:x:x:x:x | x:x:x:x:x:x
* | x:x:x:x:x:x -- 22 bytes
*
* Deauthenticate pattern
* ----------------------
* Frame control = 00 00 1100
* DA, SA, BSSID = x:x:x:x:x:x
* Pattern will be C0000000 | x:x:x:x:x:x | x:x:x:x:x:x
* | x:x:x:x:x:x -- 22 bytes
*/
/* Create Disassociate Pattern first */
byte_cnt = 0;
/* Fill out the mask with all FF's */
for (i = 0; i < MAX_PATTERN_MASK_SIZE; i++)
dis_deauth_mask[i] = 0xff;
/* copy the first byte of frame control field */
dis_deauth_pattern[byte_cnt] = 0xa0;
byte_cnt++;
/* skip 2nd byte of frame control and Duration field */
byte_cnt += 3;
/*
* need not match the destination mac address, it can be a broadcast
* mac address or an unicast to this station
*/
byte_cnt += 6;
/* copy the source mac address */
memcpy((dis_deauth_pattern + byte_cnt), common->curbssid, ETH_ALEN);
byte_cnt += 6;
/* copy the bssid, its same as the source mac address */
memcpy((dis_deauth_pattern + byte_cnt), common->curbssid, ETH_ALEN);
/* Create Disassociate pattern mask */
if (pcaps->hw_caps & ATH9K_HW_WOW_PATTERN_MATCH_EXACT) {
if (pcaps->hw_caps & ATH9K_HW_WOW_PATTERN_MATCH_DWORD) {
/*
* for AR9280, because of hardware limitation, the
* first 4 bytes have to be matched for all patterns.
* the mask for disassociation and de-auth pattern
* matching need to enable the first 4 bytes.
* also the duration field needs to be filled.
*/
dis_deauth_mask[0] = 0xf0;
/*
* fill in duration field
FIXME: what is the exact value ?
*/
dis_deauth_pattern[2] = 0xff;
dis_deauth_pattern[3] = 0xff;
} else {
dis_deauth_mask[0] = 0xfe;
}
dis_deauth_mask[1] = 0x03;
dis_deauth_mask[2] = 0xc0;
} else {
dis_deauth_mask[0] = 0xef;
dis_deauth_mask[1] = 0x3f;
dis_deauth_mask[2] = 0x00;
dis_deauth_mask[3] = 0xfc;
}
ath_dbg(common, WOW, "Adding disassoc/deauth patterns for WoW\n");
ath9k_hw_wow_apply_pattern(ah, dis_deauth_pattern, dis_deauth_mask,
pattern_count, byte_cnt);
pattern_count++;
/*
* for de-authenticate pattern, only the first byte of the frame
* control field gets changed from 0xA0 to 0xC0
*/
dis_deauth_pattern[0] = 0xC0;
ath9k_hw_wow_apply_pattern(ah, dis_deauth_pattern, dis_deauth_mask,
pattern_count, byte_cnt);
}
static void ath9k_wow_add_pattern(struct ath_softc *sc,
struct cfg80211_wowlan *wowlan)
{
struct ath_hw *ah = sc->sc_ah;
struct ath9k_wow_pattern *wow_pattern = NULL;
struct cfg80211_wowlan_trig_pkt_pattern *patterns = wowlan->patterns;
int mask_len;
s8 i = 0;
if (!wowlan->n_patterns)
return;
/*
* Add the new user configured patterns
*/
for (i = 0; i < wowlan->n_patterns; i++) {
wow_pattern = kzalloc(sizeof(*wow_pattern), GFP_KERNEL);
if (!wow_pattern)
return;
/*
* TODO: convert the generic user space pattern to
* appropriate chip specific/802.11 pattern.
*/
mask_len = DIV_ROUND_UP(wowlan->patterns[i].pattern_len, 8);
memset(wow_pattern->pattern_bytes, 0, MAX_PATTERN_SIZE);
memset(wow_pattern->mask_bytes, 0, MAX_PATTERN_SIZE);
memcpy(wow_pattern->pattern_bytes, patterns[i].pattern,
patterns[i].pattern_len);
memcpy(wow_pattern->mask_bytes, patterns[i].mask, mask_len);
wow_pattern->pattern_len = patterns[i].pattern_len;
/*
* just need to take care of deauth and disssoc pattern,
* make sure we don't overwrite them.
*/
ath9k_hw_wow_apply_pattern(ah, wow_pattern->pattern_bytes,
wow_pattern->mask_bytes,
i + 2,
wow_pattern->pattern_len);
kfree(wow_pattern);
}
}
static int ath9k_suspend(struct ieee80211_hw *hw,
struct cfg80211_wowlan *wowlan)
{
struct ath_softc *sc = hw->priv;
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
u32 wow_triggers_enabled = 0;
int ret = 0;
mutex_lock(&sc->mutex);
ath_cancel_work(sc);
del_timer_sync(&common->ani.timer);
del_timer_sync(&sc->rx_poll_timer);
if (test_bit(SC_OP_INVALID, &sc->sc_flags)) {
ath_dbg(common, ANY, "Device not present\n");
ret = -EINVAL;
goto fail_wow;
}
if (WARN_ON(!wowlan)) {
ath_dbg(common, WOW, "None of the WoW triggers enabled\n");
ret = -EINVAL;
goto fail_wow;
}
if (!device_can_wakeup(sc->dev)) {
ath_dbg(common, WOW, "device_can_wakeup failed, WoW is not enabled\n");
ret = 1;
goto fail_wow;
}
/*
* none of the sta vifs are associated
* and we are not currently handling multivif
* cases, for instance we have to seperately
* configure 'keep alive frame' for each
* STA.
*/
if (!test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags)) {
ath_dbg(common, WOW, "None of the STA vifs are associated\n");
ret = 1;
goto fail_wow;
}
if (sc->nvifs > 1) {
ath_dbg(common, WOW, "WoW for multivif is not yet supported\n");
ret = 1;
goto fail_wow;
}
ath9k_wow_map_triggers(sc, wowlan, &wow_triggers_enabled);
ath_dbg(common, WOW, "WoW triggers enabled 0x%x\n",
wow_triggers_enabled);
ath9k_ps_wakeup(sc);
ath9k_stop_btcoex(sc);
/*
* Enable wake up on recieving disassoc/deauth
* frame by default.
*/
ath9k_wow_add_disassoc_deauth_pattern(sc);
if (wow_triggers_enabled & AH_WOW_USER_PATTERN_EN)
ath9k_wow_add_pattern(sc, wowlan);
spin_lock_bh(&sc->sc_pcu_lock);
/*
* To avoid false wake, we enable beacon miss interrupt only
* when we go to sleep. We save the current interrupt mask
* so we can restore it after the system wakes up
*/
sc->wow_intr_before_sleep = ah->imask;
ah->imask &= ~ATH9K_INT_GLOBAL;
ath9k_hw_disable_interrupts(ah);
ah->imask = ATH9K_INT_BMISS | ATH9K_INT_GLOBAL;
ath9k_hw_set_interrupts(ah);
ath9k_hw_enable_interrupts(ah);
spin_unlock_bh(&sc->sc_pcu_lock);
/*
* we can now sync irq and kill any running tasklets, since we already
* disabled interrupts and not holding a spin lock
*/
synchronize_irq(sc->irq);
tasklet_kill(&sc->intr_tq);
ath9k_hw_wow_enable(ah, wow_triggers_enabled);
ath9k_ps_restore(sc);
ath_dbg(common, ANY, "WoW enabled in ath9k\n");
atomic_inc(&sc->wow_sleep_proc_intr);
fail_wow:
mutex_unlock(&sc->mutex);
return ret;
}
static int ath9k_resume(struct ieee80211_hw *hw)
{
struct ath_softc *sc = hw->priv;
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
u32 wow_status;
mutex_lock(&sc->mutex);
ath9k_ps_wakeup(sc);
spin_lock_bh(&sc->sc_pcu_lock);
ath9k_hw_disable_interrupts(ah);
ah->imask = sc->wow_intr_before_sleep;
ath9k_hw_set_interrupts(ah);
ath9k_hw_enable_interrupts(ah);
spin_unlock_bh(&sc->sc_pcu_lock);
wow_status = ath9k_hw_wow_wakeup(ah);
if (atomic_read(&sc->wow_got_bmiss_intr) == 0) {
/*
* some devices may not pick beacon miss
* as the reason they woke up so we add
* that here for that shortcoming.
*/
wow_status |= AH_WOW_BEACON_MISS;
atomic_dec(&sc->wow_got_bmiss_intr);
ath_dbg(common, ANY, "Beacon miss interrupt picked up during WoW sleep\n");
}
atomic_dec(&sc->wow_sleep_proc_intr);
if (wow_status) {
ath_dbg(common, ANY, "Waking up due to WoW triggers %s with WoW status = %x\n",
ath9k_hw_wow_event_to_string(wow_status), wow_status);
}
ath_restart_work(sc);
ath9k_start_btcoex(sc);
ath9k_ps_restore(sc);
mutex_unlock(&sc->mutex);
return 0;
}
static void ath9k_set_wakeup(struct ieee80211_hw *hw, bool enabled)
{
struct ath_softc *sc = hw->priv;
mutex_lock(&sc->mutex);
device_init_wakeup(sc->dev, 1);
device_set_wakeup_enable(sc->dev, enabled);
mutex_unlock(&sc->mutex);
}
#endif
struct ieee80211_ops ath9k_ops = {
.tx = ath9k_tx,
.start = ath9k_start,
.stop = ath9k_stop,
.add_interface = ath9k_add_interface,
.change_interface = ath9k_change_interface,
.remove_interface = ath9k_remove_interface,
.config = ath9k_config,
.configure_filter = ath9k_configure_filter,
.sta_add = ath9k_sta_add,
.sta_remove = ath9k_sta_remove,
.sta_notify = ath9k_sta_notify,
.conf_tx = ath9k_conf_tx,
.bss_info_changed = ath9k_bss_info_changed,
.set_key = ath9k_set_key,
.get_tsf = ath9k_get_tsf,
.set_tsf = ath9k_set_tsf,
.reset_tsf = ath9k_reset_tsf,
.ampdu_action = ath9k_ampdu_action,
.get_survey = ath9k_get_survey,
.rfkill_poll = ath9k_rfkill_poll_state,
.set_coverage_class = ath9k_set_coverage_class,
.flush = ath9k_flush,
.tx_frames_pending = ath9k_tx_frames_pending,
.tx_last_beacon = ath9k_tx_last_beacon,
.get_stats = ath9k_get_stats,
.set_antenna = ath9k_set_antenna,
.get_antenna = ath9k_get_antenna,
#ifdef CONFIG_PM_SLEEP
.suspend = ath9k_suspend,
.resume = ath9k_resume,
.set_wakeup = ath9k_set_wakeup,
#endif
#ifdef CONFIG_ATH9K_DEBUGFS
.get_et_sset_count = ath9k_get_et_sset_count,
.get_et_stats = ath9k_get_et_stats,
.get_et_strings = ath9k_get_et_strings,
#endif
};
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