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linux/drivers/net/wireless/ath/ath9k/main.c

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/*
* Copyright (c) 2008-2009 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 "ath9k.h"
#include "btcoex.h"
static void ath_cache_conf_rate(struct ath_softc *sc,
struct ieee80211_conf *conf)
{
switch (conf->channel->band) {
case IEEE80211_BAND_2GHZ:
if (conf_is_ht20(conf))
sc->cur_rate_mode = ATH9K_MODE_11NG_HT20;
else if (conf_is_ht40_minus(conf))
sc->cur_rate_mode = ATH9K_MODE_11NG_HT40MINUS;
else if (conf_is_ht40_plus(conf))
sc->cur_rate_mode = ATH9K_MODE_11NG_HT40PLUS;
else
sc->cur_rate_mode = ATH9K_MODE_11G;
break;
case IEEE80211_BAND_5GHZ:
if (conf_is_ht20(conf))
sc->cur_rate_mode = ATH9K_MODE_11NA_HT20;
else if (conf_is_ht40_minus(conf))
sc->cur_rate_mode = ATH9K_MODE_11NA_HT40MINUS;
else if (conf_is_ht40_plus(conf))
sc->cur_rate_mode = ATH9K_MODE_11NA_HT40PLUS;
else
sc->cur_rate_mode = ATH9K_MODE_11A;
break;
default:
BUG_ON(1);
break;
}
}
static void ath_update_txpow(struct ath_softc *sc)
{
struct ath_hw *ah = sc->sc_ah;
u32 txpow;
if (sc->curtxpow != sc->config.txpowlimit) {
ath9k_hw_set_txpowerlimit(ah, sc->config.txpowlimit);
/* read back in case value is clamped */
ath9k_hw_getcapability(ah, ATH9K_CAP_TXPOW, 1, &txpow);
sc->curtxpow = txpow;
}
}
static u8 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 struct ath9k_channel *ath_get_curchannel(struct ath_softc *sc,
struct ieee80211_hw *hw)
{
struct ieee80211_channel *curchan = hw->conf.channel;
struct ath9k_channel *channel;
u8 chan_idx;
chan_idx = curchan->hw_value;
channel = &sc->sc_ah->channels[chan_idx];
ath9k_update_ichannel(sc, hw, channel);
return channel;
}
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)
{
unsigned long flags;
spin_lock_irqsave(&sc->sc_pm_lock, flags);
if (++sc->ps_usecount != 1)
goto unlock;
ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
unlock:
spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
}
void ath9k_ps_restore(struct ath_softc *sc)
{
unsigned long flags;
spin_lock_irqsave(&sc->sc_pm_lock, flags);
if (--sc->ps_usecount != 0)
goto unlock;
if (sc->ps_idle)
ath9k_hw_setpower(sc->sc_ah, 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)))
ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_NETWORK_SLEEP);
unlock:
spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
}
/*
* 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.
*/
int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
struct ath9k_channel *hchan)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ieee80211_conf *conf = &common->hw->conf;
bool fastcc = true, stopped;
struct ieee80211_channel *channel = hw->conf.channel;
int r;
if (sc->sc_flags & SC_OP_INVALID)
return -EIO;
ath9k_ps_wakeup(sc);
/*
* This is only performed if the channel settings have
* actually changed.
*
* To switch channels clear any pending DMA operations;
* wait long enough for the RX fifo to drain, reset the
* hardware at the new frequency, and then re-enable
* the relevant bits of the h/w.
*/
ath9k_hw_set_interrupts(ah, 0);
ath_drain_all_txq(sc, false);
stopped = ath_stoprecv(sc);
/* XXX: do not flush receive queue here. We don't want
* to flush data frames already in queue because of
* changing channel. */
if (!stopped || (sc->sc_flags & SC_OP_FULL_RESET))
fastcc = false;
ath_print(common, ATH_DBG_CONFIG,
"(%u MHz) -> (%u MHz), conf_is_ht40: %d\n",
sc->sc_ah->curchan->channel,
channel->center_freq, conf_is_ht40(conf));
spin_lock_bh(&sc->sc_resetlock);
r = ath9k_hw_reset(ah, hchan, fastcc);
if (r) {
ath_print(common, ATH_DBG_FATAL,
"Unable to reset channel (%u MHz), "
"reset status %d\n",
channel->center_freq, r);
spin_unlock_bh(&sc->sc_resetlock);
goto ps_restore;
}
spin_unlock_bh(&sc->sc_resetlock);
sc->sc_flags &= ~SC_OP_FULL_RESET;
if (ath_startrecv(sc) != 0) {
ath_print(common, ATH_DBG_FATAL,
"Unable to restart recv logic\n");
r = -EIO;
goto ps_restore;
}
ath_cache_conf_rate(sc, &hw->conf);
ath_update_txpow(sc);
ath9k_hw_set_interrupts(ah, ah->imask);
ps_restore:
ath9k_ps_restore(sc);
return r;
}
/*
* This routine performs the periodic noise floor calibration function
* that is used to adjust and optimize the chip performance. This
* takes environmental changes (location, temperature) into account.
* When the task is complete, it reschedules itself depending on the
* appropriate interval that was calculated.
*/
void ath_ani_calibrate(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);
bool longcal = false;
bool shortcal = false;
bool aniflag = false;
unsigned int timestamp = jiffies_to_msecs(jiffies);
u32 cal_interval, short_cal_interval;
short_cal_interval = (ah->opmode == NL80211_IFTYPE_AP) ?
ATH_AP_SHORT_CALINTERVAL : ATH_STA_SHORT_CALINTERVAL;
/* Only calibrate if awake */
if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE)
goto set_timer;
ath9k_ps_wakeup(sc);
/* Long calibration runs independently of short calibration. */
if ((timestamp - common->ani.longcal_timer) >= ATH_LONG_CALINTERVAL) {
longcal = true;
ath_print(common, ATH_DBG_ANI, "longcal @%lu\n", jiffies);
common->ani.longcal_timer = timestamp;
}
/* Short calibration applies only while caldone is false */
if (!common->ani.caldone) {
if ((timestamp - common->ani.shortcal_timer) >= short_cal_interval) {
shortcal = true;
ath_print(common, ATH_DBG_ANI,
"shortcal @%lu\n", jiffies);
common->ani.shortcal_timer = timestamp;
common->ani.resetcal_timer = timestamp;
}
} else {
if ((timestamp - common->ani.resetcal_timer) >=
ATH_RESTART_CALINTERVAL) {
common->ani.caldone = ath9k_hw_reset_calvalid(ah);
if (common->ani.caldone)
common->ani.resetcal_timer = timestamp;
}
}
/* Verify whether we must check ANI */
if ((timestamp - common->ani.checkani_timer) >= ATH_ANI_POLLINTERVAL) {
aniflag = true;
common->ani.checkani_timer = timestamp;
}
/* Skip all processing if there's nothing to do. */
if (longcal || shortcal || aniflag) {
/* Call ANI routine if necessary */
if (aniflag)
ath9k_hw_ani_monitor(ah, ah->curchan);
/* Perform calibration if necessary */
if (longcal || shortcal) {
common->ani.caldone =
ath9k_hw_calibrate(ah,
ah->curchan,
common->rx_chainmask,
longcal);
if (longcal)
common->ani.noise_floor = ath9k_hw_getchan_noise(ah,
ah->curchan);
ath_print(common, ATH_DBG_ANI,
" calibrate chan %u/%x nf: %d\n",
ah->curchan->channel,
ah->curchan->channelFlags,
common->ani.noise_floor);
}
}
ath9k_ps_restore(sc);
set_timer:
/*
* Set timer interval based on previous results.
* The interval must be the shortest necessary to satisfy ANI,
* short calibration and long calibration.
*/
cal_interval = ATH_LONG_CALINTERVAL;
if (sc->sc_ah->config.enable_ani)
cal_interval = min(cal_interval, (u32)ATH_ANI_POLLINTERVAL);
if (!common->ani.caldone)
cal_interval = min(cal_interval, (u32)short_cal_interval);
mod_timer(&common->ani.timer, jiffies + msecs_to_jiffies(cal_interval));
}
static void ath_start_ani(struct ath_common *common)
{
unsigned long timestamp = jiffies_to_msecs(jiffies);
common->ani.longcal_timer = timestamp;
common->ani.shortcal_timer = timestamp;
common->ani.checkani_timer = timestamp;
mod_timer(&common->ani.timer,
jiffies + msecs_to_jiffies(ATH_ANI_POLLINTERVAL));
}
/*
* Update tx/rx chainmask. For legacy association,
* hard code chainmask to 1x1, for 11n association, use
* the chainmask configuration, for bt coexistence, use
* the chainmask configuration even in legacy mode.
*/
void ath_update_chainmask(struct ath_softc *sc, int is_ht)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
if ((sc->sc_flags & SC_OP_SCANNING) || is_ht ||
(ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE)) {
common->tx_chainmask = ah->caps.tx_chainmask;
common->rx_chainmask = ah->caps.rx_chainmask;
} else {
common->tx_chainmask = 1;
common->rx_chainmask = 1;
}
ath_print(common, ATH_DBG_CONFIG,
"tx chmask: %d, rx chmask: %d\n",
common->tx_chainmask,
common->rx_chainmask);
}
static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta)
{
struct ath_node *an;
an = (struct ath_node *)sta->drv_priv;
if (sc->sc_flags & SC_OP_TXAGGR) {
ath_tx_node_init(sc, an);
an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR +
sta->ht_cap.ampdu_factor);
an->mpdudensity = parse_mpdudensity(sta->ht_cap.ampdu_density);
an->last_rssi = ATH_RSSI_DUMMY_MARKER;
}
}
static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta)
{
struct ath_node *an = (struct ath_node *)sta->drv_priv;
if (sc->sc_flags & SC_OP_TXAGGR)
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);
u32 status = sc->intrstatus;
u32 rxmask;
ath9k_ps_wakeup(sc);
if ((status & ATH9K_INT_FATAL) ||
!ath9k_hw_check_alive(ah)) {
ath_reset(sc, false);
ath9k_ps_restore(sc);
return;
}
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) {
spin_lock_bh(&sc->rx.rxflushlock);
/* 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);
spin_unlock_bh(&sc->rx.rxflushlock);
}
if (status & ATH9K_INT_TX) {
if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
ath_tx_edma_tasklet(sc);
else
ath_tx_tasklet(sc);
}
if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) {
/*
* TSF sync does not look correct; remain awake to sync with
* the next Beacon.
*/
ath_print(common, ATH_DBG_PS,
"TSFOOR - Sync with next Beacon\n");
sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
}
if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
if (status & ATH9K_INT_GENTIMER)
ath_gen_timer_isr(sc->sc_ah);
/* re-enable hardware interrupt */
ath9k_hw_set_interrupts(ah, ah->imask);
ath9k_ps_restore(sc);
}
irqreturn_t ath_isr(int irq, void *dev)
{
#define SCHED_INTR ( \
ATH9K_INT_FATAL | \
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)
struct ath_softc *sc = dev;
struct ath_hw *ah = sc->sc_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 (sc->sc_flags & SC_OP_INVALID)
return IRQ_NONE;
/* shared irq, not for us */
if (!ath9k_hw_intrpend(ah))
return IRQ_NONE;
/*
* 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;
/*
* 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 (status & ATH9K_INT_SWBA)
tasklet_schedule(&sc->bcon_tasklet);
if (status & ATH9K_INT_TXURN)
ath9k_hw_updatetxtriglevel(ah, true);
if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) {
if (status & ATH9K_INT_RXEOL) {
ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN);
ath9k_hw_set_interrupts(ah, ah->imask);
}
}
if (status & ATH9K_INT_MIB) {
/*
* Disable interrupts until we service the MIB
* interrupt; otherwise it will continue to
* fire.
*/
ath9k_hw_set_interrupts(ah, 0);
/*
* Let the hal handle the event. We assume
* it will clear whatever condition caused
* the interrupt.
*/
ath9k_hw_procmibevent(ah);
ath9k_hw_set_interrupts(ah, ah->imask);
}
if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP))
if (status & ATH9K_INT_TIM_TIMER) {
/* Clear RxAbort bit so that we can
* receive frames */
ath9k_setpower(sc, ATH9K_PM_AWAKE);
ath9k_hw_setrxabort(sc->sc_ah, 0);
sc->ps_flags |= PS_WAIT_FOR_BEACON;
}
chip_reset:
ath_debug_stat_interrupt(sc, status);
if (sched) {
/* turn off every interrupt except SWBA */
ath9k_hw_set_interrupts(ah, (ah->imask & ATH9K_INT_SWBA));
tasklet_schedule(&sc->intr_tq);
}
return IRQ_HANDLED;
#undef SCHED_INTR
}
static u32 ath_get_extchanmode(struct ath_softc *sc,
struct ieee80211_channel *chan,
enum nl80211_channel_type channel_type)
{
u32 chanmode = 0;
switch (chan->band) {
case IEEE80211_BAND_2GHZ:
switch(channel_type) {
case NL80211_CHAN_NO_HT:
case NL80211_CHAN_HT20:
chanmode = CHANNEL_G_HT20;
break;
case NL80211_CHAN_HT40PLUS:
chanmode = CHANNEL_G_HT40PLUS;
break;
case NL80211_CHAN_HT40MINUS:
chanmode = CHANNEL_G_HT40MINUS;
break;
}
break;
case IEEE80211_BAND_5GHZ:
switch(channel_type) {
case NL80211_CHAN_NO_HT:
case NL80211_CHAN_HT20:
chanmode = CHANNEL_A_HT20;
break;
case NL80211_CHAN_HT40PLUS:
chanmode = CHANNEL_A_HT40PLUS;
break;
case NL80211_CHAN_HT40MINUS:
chanmode = CHANNEL_A_HT40MINUS;
break;
}
break;
default:
break;
}
return chanmode;
}
static int ath_setkey_tkip(struct ath_common *common, u16 keyix, const u8 *key,
struct ath9k_keyval *hk, const u8 *addr,
bool authenticator)
{
struct ath_hw *ah = common->ah;
const u8 *key_rxmic;
const u8 *key_txmic;
key_txmic = key + NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY;
key_rxmic = key + NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY;
if (addr == NULL) {
/*
* Group key installation - only two key cache entries are used
* regardless of splitmic capability since group key is only
* used either for TX or RX.
*/
if (authenticator) {
memcpy(hk->kv_mic, key_txmic, sizeof(hk->kv_mic));
memcpy(hk->kv_txmic, key_txmic, sizeof(hk->kv_mic));
} else {
memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic));
memcpy(hk->kv_txmic, key_rxmic, sizeof(hk->kv_mic));
}
return ath9k_hw_set_keycache_entry(ah, keyix, hk, addr);
}
if (!common->splitmic) {
/* TX and RX keys share the same key cache entry. */
memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic));
memcpy(hk->kv_txmic, key_txmic, sizeof(hk->kv_txmic));
return ath9k_hw_set_keycache_entry(ah, keyix, hk, addr);
}
/* Separate key cache entries for TX and RX */
/* TX key goes at first index, RX key at +32. */
memcpy(hk->kv_mic, key_txmic, sizeof(hk->kv_mic));
if (!ath9k_hw_set_keycache_entry(ah, keyix, hk, NULL)) {
/* TX MIC entry failed. No need to proceed further */
ath_print(common, ATH_DBG_FATAL,
"Setting TX MIC Key Failed\n");
return 0;
}
memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic));
/* XXX delete tx key on failure? */
return ath9k_hw_set_keycache_entry(ah, keyix + 32, hk, addr);
}
static int ath_reserve_key_cache_slot_tkip(struct ath_common *common)
{
int i;
for (i = IEEE80211_WEP_NKID; i < common->keymax / 2; i++) {
if (test_bit(i, common->keymap) ||
test_bit(i + 64, common->keymap))
continue; /* At least one part of TKIP key allocated */
if (common->splitmic &&
(test_bit(i + 32, common->keymap) ||
test_bit(i + 64 + 32, common->keymap)))
continue; /* At least one part of TKIP key allocated */
/* Found a free slot for a TKIP key */
return i;
}
return -1;
}
static int ath_reserve_key_cache_slot(struct ath_common *common)
{
int i;
/* First, try to find slots that would not be available for TKIP. */
if (common->splitmic) {
for (i = IEEE80211_WEP_NKID; i < common->keymax / 4; i++) {
if (!test_bit(i, common->keymap) &&
(test_bit(i + 32, common->keymap) ||
test_bit(i + 64, common->keymap) ||
test_bit(i + 64 + 32, common->keymap)))
return i;
if (!test_bit(i + 32, common->keymap) &&
(test_bit(i, common->keymap) ||
test_bit(i + 64, common->keymap) ||
test_bit(i + 64 + 32, common->keymap)))
return i + 32;
if (!test_bit(i + 64, common->keymap) &&
(test_bit(i , common->keymap) ||
test_bit(i + 32, common->keymap) ||
test_bit(i + 64 + 32, common->keymap)))
return i + 64;
if (!test_bit(i + 64 + 32, common->keymap) &&
(test_bit(i, common->keymap) ||
test_bit(i + 32, common->keymap) ||
test_bit(i + 64, common->keymap)))
return i + 64 + 32;
}
} else {
for (i = IEEE80211_WEP_NKID; i < common->keymax / 2; i++) {
if (!test_bit(i, common->keymap) &&
test_bit(i + 64, common->keymap))
return i;
if (test_bit(i, common->keymap) &&
!test_bit(i + 64, common->keymap))
return i + 64;
}
}
/* No partially used TKIP slots, pick any available slot */
for (i = IEEE80211_WEP_NKID; i < common->keymax; i++) {
/* Do not allow slots that could be needed for TKIP group keys
* to be used. This limitation could be removed if we know that
* TKIP will not be used. */
if (i >= 64 && i < 64 + IEEE80211_WEP_NKID)
continue;
if (common->splitmic) {
if (i >= 32 && i < 32 + IEEE80211_WEP_NKID)
continue;
if (i >= 64 + 32 && i < 64 + 32 + IEEE80211_WEP_NKID)
continue;
}
if (!test_bit(i, common->keymap))
return i; /* Found a free slot for a key */
}
/* No free slot found */
return -1;
}
static int ath_key_config(struct ath_common *common,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta,
struct ieee80211_key_conf *key)
{
struct ath_hw *ah = common->ah;
struct ath9k_keyval hk;
const u8 *mac = NULL;
u8 gmac[ETH_ALEN];
int ret = 0;
int idx;
memset(&hk, 0, sizeof(hk));
switch (key->alg) {
case ALG_WEP:
hk.kv_type = ATH9K_CIPHER_WEP;
break;
case ALG_TKIP:
hk.kv_type = ATH9K_CIPHER_TKIP;
break;
case ALG_CCMP:
hk.kv_type = ATH9K_CIPHER_AES_CCM;
break;
default:
return -EOPNOTSUPP;
}
hk.kv_len = key->keylen;
memcpy(hk.kv_val, key->key, key->keylen);
if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) {
if (key->ap_addr) {
/*
* Group keys on hardware that supports multicast frame
* key search use a mac that is the sender's address with
* the high bit set instead of the app-specified address.
*/
memcpy(gmac, key->ap_addr, ETH_ALEN);
gmac[0] |= 0x80;
mac = gmac;
if (key->alg == ALG_TKIP)
idx = ath_reserve_key_cache_slot_tkip(common);
else
idx = ath_reserve_key_cache_slot(common);
if (idx < 0)
mac = NULL; /* no free key cache entries */
}
if (!mac) {
/* For now, use the default keys for broadcast keys. This may
* need to change with virtual interfaces. */
idx = key->keyidx;
}
} else if (key->keyidx) {
if (WARN_ON(!sta))
return -EOPNOTSUPP;
mac = sta->addr;
if (vif->type != NL80211_IFTYPE_AP) {
/* Only keyidx 0 should be used with unicast key, but
* allow this for client mode for now. */
idx = key->keyidx;
} else
return -EIO;
} else {
if (WARN_ON(!sta))
return -EOPNOTSUPP;
mac = sta->addr;
if (key->alg == ALG_TKIP)
idx = ath_reserve_key_cache_slot_tkip(common);
else
idx = ath_reserve_key_cache_slot(common);
if (idx < 0)
return -ENOSPC; /* no free key cache entries */
}
if (key->alg == ALG_TKIP)
ret = ath_setkey_tkip(common, idx, key->key, &hk, mac,
vif->type == NL80211_IFTYPE_AP);
else
ret = ath9k_hw_set_keycache_entry(ah, idx, &hk, mac);
if (!ret)
return -EIO;
set_bit(idx, common->keymap);
if (key->alg == ALG_TKIP) {
set_bit(idx + 64, common->keymap);
if (common->splitmic) {
set_bit(idx + 32, common->keymap);
set_bit(idx + 64 + 32, common->keymap);
}
}
return idx;
}
static void ath_key_delete(struct ath_common *common, struct ieee80211_key_conf *key)
{
struct ath_hw *ah = common->ah;
ath9k_hw_keyreset(ah, key->hw_key_idx);
if (key->hw_key_idx < IEEE80211_WEP_NKID)
return;
clear_bit(key->hw_key_idx, common->keymap);
if (key->alg != ALG_TKIP)
return;
clear_bit(key->hw_key_idx + 64, common->keymap);
if (common->splitmic) {
ath9k_hw_keyreset(ah, key->hw_key_idx + 32);
clear_bit(key->hw_key_idx + 32, common->keymap);
clear_bit(key->hw_key_idx + 64 + 32, common->keymap);
}
}
static void ath9k_bss_assoc_info(struct ath_softc *sc,
struct ieee80211_vif *vif,
struct ieee80211_bss_conf *bss_conf)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
if (bss_conf->assoc) {
ath_print(common, ATH_DBG_CONFIG,
"Bss Info ASSOC %d, bssid: %pM\n",
bss_conf->aid, common->curbssid);
/* New association, store aid */
common->curaid = bss_conf->aid;
ath9k_hw_write_associd(ah);
/*
* Request a re-configuration of Beacon related timers
* on the receipt of the first Beacon frame (i.e.,
* after time sync with the AP).
*/
sc->ps_flags |= PS_BEACON_SYNC;
/* Configure the beacon */
ath_beacon_config(sc, vif);
/* Reset rssi stats */
sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER;
ath_start_ani(common);
} else {
ath_print(common, ATH_DBG_CONFIG, "Bss Info DISASSOC\n");
common->curaid = 0;
/* Stop ANI */
del_timer_sync(&common->ani.timer);
}
}
void ath_radio_enable(struct ath_softc *sc, struct ieee80211_hw *hw)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ieee80211_channel *channel = hw->conf.channel;
int r;
ath9k_ps_wakeup(sc);
ath9k_hw_configpcipowersave(ah, 0, 0);
if (!ah->curchan)
ah->curchan = ath_get_curchannel(sc, sc->hw);
spin_lock_bh(&sc->sc_resetlock);
r = ath9k_hw_reset(ah, ah->curchan, false);
if (r) {
ath_print(common, ATH_DBG_FATAL,
"Unable to reset channel (%u MHz), "
"reset status %d\n",
channel->center_freq, r);
}
spin_unlock_bh(&sc->sc_resetlock);
ath_update_txpow(sc);
if (ath_startrecv(sc) != 0) {
ath_print(common, ATH_DBG_FATAL,
"Unable to restart recv logic\n");
return;
}
if (sc->sc_flags & SC_OP_BEACONS)
ath_beacon_config(sc, NULL); /* restart beacons */
/* Re-Enable interrupts */
ath9k_hw_set_interrupts(ah, ah->imask);
/* Enable LED */
ath9k_hw_cfg_output(ah, ah->led_pin,
AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
ath9k_hw_set_gpio(ah, ah->led_pin, 0);
ieee80211_wake_queues(hw);
ath9k_ps_restore(sc);
}
void ath_radio_disable(struct ath_softc *sc, struct ieee80211_hw *hw)
{
struct ath_hw *ah = sc->sc_ah;
struct ieee80211_channel *channel = hw->conf.channel;
int r;
ath9k_ps_wakeup(sc);
ieee80211_stop_queues(hw);
/* Disable LED */
ath9k_hw_set_gpio(ah, ah->led_pin, 1);
ath9k_hw_cfg_gpio_input(ah, ah->led_pin);
/* Disable interrupts */
ath9k_hw_set_interrupts(ah, 0);
ath_drain_all_txq(sc, false); /* clear pending tx frames */
ath_stoprecv(sc); /* turn off frame recv */
ath_flushrecv(sc); /* flush recv queue */
if (!ah->curchan)
ah->curchan = ath_get_curchannel(sc, hw);
spin_lock_bh(&sc->sc_resetlock);
r = ath9k_hw_reset(ah, ah->curchan, false);
if (r) {
ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL,
"Unable to reset channel (%u MHz), "
"reset status %d\n",
channel->center_freq, r);
}
spin_unlock_bh(&sc->sc_resetlock);
ath9k_hw_phy_disable(ah);
ath9k_hw_configpcipowersave(ah, 1, 1);
ath9k_ps_restore(sc);
ath9k_setpower(sc, ATH9K_PM_FULL_SLEEP);
}
int ath_reset(struct ath_softc *sc, bool retry_tx)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ieee80211_hw *hw = sc->hw;
int r;
/* Stop ANI */
del_timer_sync(&common->ani.timer);
ieee80211_stop_queues(hw);
ath9k_hw_set_interrupts(ah, 0);
ath_drain_all_txq(sc, retry_tx);
ath_stoprecv(sc);
ath_flushrecv(sc);
spin_lock_bh(&sc->sc_resetlock);
r = ath9k_hw_reset(ah, sc->sc_ah->curchan, false);
if (r)
ath_print(common, ATH_DBG_FATAL,
"Unable to reset hardware; reset status %d\n", r);
spin_unlock_bh(&sc->sc_resetlock);
if (ath_startrecv(sc) != 0)
ath_print(common, ATH_DBG_FATAL,
"Unable to start recv logic\n");
/*
* We may be doing a reset in response to a request
* that changes the channel so update any state that
* might change as a result.
*/
ath_cache_conf_rate(sc, &hw->conf);
ath_update_txpow(sc);
if (sc->sc_flags & SC_OP_BEACONS)
ath_beacon_config(sc, NULL); /* restart beacons */
ath9k_hw_set_interrupts(ah, ah->imask);
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);
}
}
}
ieee80211_wake_queues(hw);
/* Start ANI */
ath_start_ani(common);
return r;
}
int ath_get_hal_qnum(u16 queue, struct ath_softc *sc)
{
int qnum;
switch (queue) {
case 0:
qnum = sc->tx.hwq_map[ATH9K_WME_AC_VO];
break;
case 1:
qnum = sc->tx.hwq_map[ATH9K_WME_AC_VI];
break;
case 2:
qnum = sc->tx.hwq_map[ATH9K_WME_AC_BE];
break;
case 3:
qnum = sc->tx.hwq_map[ATH9K_WME_AC_BK];
break;
default:
qnum = sc->tx.hwq_map[ATH9K_WME_AC_BE];
break;
}
return qnum;
}
int ath_get_mac80211_qnum(u32 queue, struct ath_softc *sc)
{
int qnum;
switch (queue) {
case ATH9K_WME_AC_VO:
qnum = 0;
break;
case ATH9K_WME_AC_VI:
qnum = 1;
break;
case ATH9K_WME_AC_BE:
qnum = 2;
break;
case ATH9K_WME_AC_BK:
qnum = 3;
break;
default:
qnum = -1;
break;
}
return qnum;
}
/* XXX: Remove me once we don't depend on ath9k_channel for all
* this redundant data */
void ath9k_update_ichannel(struct ath_softc *sc, struct ieee80211_hw *hw,
struct ath9k_channel *ichan)
{
struct ieee80211_channel *chan = hw->conf.channel;
struct ieee80211_conf *conf = &hw->conf;
ichan->channel = chan->center_freq;
ichan->chan = chan;
if (chan->band == IEEE80211_BAND_2GHZ) {
ichan->chanmode = CHANNEL_G;
ichan->channelFlags = CHANNEL_2GHZ | CHANNEL_OFDM | CHANNEL_G;
} else {
ichan->chanmode = CHANNEL_A;
ichan->channelFlags = CHANNEL_5GHZ | CHANNEL_OFDM;
}
if (conf_is_ht(conf))
ichan->chanmode = ath_get_extchanmode(sc, chan,
conf->channel_type);
}
/**********************/
/* mac80211 callbacks */
/**********************/
static int ath9k_start(struct ieee80211_hw *hw)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
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_print(common, ATH_DBG_CONFIG,
"Starting driver with initial channel: %d MHz\n",
curchan->center_freq);
mutex_lock(&sc->mutex);
if (ath9k_wiphy_started(sc)) {
if (sc->chan_idx == curchan->hw_value) {
/*
* Already on the operational channel, the new wiphy
* can be marked active.
*/
aphy->state = ATH_WIPHY_ACTIVE;
ieee80211_wake_queues(hw);
} else {
/*
* Another wiphy is on another channel, start the new
* wiphy in paused state.
*/
aphy->state = ATH_WIPHY_PAUSED;
ieee80211_stop_queues(hw);
}
mutex_unlock(&sc->mutex);
return 0;
}
aphy->state = ATH_WIPHY_ACTIVE;
/* setup initial channel */
sc->chan_idx = curchan->hw_value;
init_channel = ath_get_curchannel(sc, hw);
/* Reset SERDES registers */
ath9k_hw_configpcipowersave(ah, 0, 0);
/*
* 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_resetlock);
r = ath9k_hw_reset(ah, init_channel, false);
if (r) {
ath_print(common, ATH_DBG_FATAL,
"Unable to reset hardware; reset status %d "
"(freq %u MHz)\n", r,
curchan->center_freq);
spin_unlock_bh(&sc->sc_resetlock);
goto mutex_unlock;
}
spin_unlock_bh(&sc->sc_resetlock);
/*
* This is needed only to setup initial state
* but it's best done after a reset.
*/
ath_update_txpow(sc);
/*
* Setup the hardware after reset:
* The receive engine is set going.
* Frame transmit is handled entirely
* in the frame output path; there's nothing to do
* here except setup the interrupt mask.
*/
if (ath_startrecv(sc) != 0) {
ath_print(common, ATH_DBG_FATAL,
"Unable to start recv logic\n");
r = -EIO;
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;
else
ah->imask |= ATH9K_INT_RX;
if (ah->caps.hw_caps & ATH9K_HW_CAP_GTT)
ah->imask |= ATH9K_INT_GTT;
if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
ah->imask |= ATH9K_INT_CST;
ath_cache_conf_rate(sc, &hw->conf);
sc->sc_flags &= ~SC_OP_INVALID;
/* Disable BMISS interrupt when we're not associated */
ah->imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
ath9k_hw_set_interrupts(ah, ah->imask);
ieee80211_wake_queues(hw);
ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
if ((ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE) &&
!ah->btcoex_hw.enabled) {
ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
AR_STOMP_LOW_WLAN_WGHT);
ath9k_hw_btcoex_enable(ah);
if (common->bus_ops->bt_coex_prep)
common->bus_ops->bt_coex_prep(common);
if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
ath9k_btcoex_timer_resume(sc);
}
mutex_unlock:
mutex_unlock(&sc->mutex);
return r;
}
static int ath9k_tx(struct ieee80211_hw *hw,
struct sk_buff *skb)
{
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ath_tx_control txctl;
int padpos, padsize;
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
if (aphy->state != ATH_WIPHY_ACTIVE && aphy->state != ATH_WIPHY_SCAN) {
ath_print(common, ATH_DBG_XMIT,
"ath9k: %s: TX in unexpected wiphy state "
"%d\n", wiphy_name(hw->wiphy), aphy->state);
goto exit;
}
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_print(common, ATH_DBG_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_AWAKE)) {
/*
* 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);
ath9k_hw_setrxabort(sc->sc_ah, 0);
if (ieee80211_is_pspoll(hdr->frame_control)) {
ath_print(common, ATH_DBG_PS,
"Sending PS-Poll to pick a buffered frame\n");
sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA;
} else {
ath_print(common, ATH_DBG_PS,
"Wake up to complete TX\n");
sc->ps_flags |= PS_WAIT_FOR_TX_ACK;
}
/*
* The actual restore operation will happen only after
* the sc_flags bit is cleared. We are just dropping
* the ps_usecount here.
*/
ath9k_ps_restore(sc);
}
memset(&txctl, 0, sizeof(struct ath_tx_control));
/*
* As a temporary workaround, assign seq# here; this will likely need
* to be cleaned up to work better with Beacon transmission and virtual
* BSSes.
*/
if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
sc->tx.seq_no += 0x10;
hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
hdr->seq_ctrl |= cpu_to_le16(sc->tx.seq_no);
}
/* Add the padding after the header if this is not already done */
padpos = ath9k_cmn_padpos(hdr->frame_control);
padsize = padpos & 3;
if (padsize && skb->len>padpos) {
if (skb_headroom(skb) < padsize)
return -1;
skb_push(skb, padsize);
memmove(skb->data, skb->data + padsize, padpos);
}
/* Check if a tx queue is available */
txctl.txq = ath_test_get_txq(sc, skb);
if (!txctl.txq)
goto exit;
ath_print(common, ATH_DBG_XMIT, "transmitting packet, skb: %p\n", skb);
if (ath_tx_start(hw, skb, &txctl) != 0) {
ath_print(common, ATH_DBG_XMIT, "TX failed\n");
goto exit;
}
return 0;
exit:
dev_kfree_skb_any(skb);
return 0;
}
static void ath9k_stop(struct ieee80211_hw *hw)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
mutex_lock(&sc->mutex);
aphy->state = ATH_WIPHY_INACTIVE;
cancel_delayed_work_sync(&sc->ath_led_blink_work);
cancel_delayed_work_sync(&sc->tx_complete_work);
if (!sc->num_sec_wiphy) {
cancel_delayed_work_sync(&sc->wiphy_work);
cancel_work_sync(&sc->chan_work);
}
if (sc->sc_flags & SC_OP_INVALID) {
ath_print(common, ATH_DBG_ANY, "Device not present\n");
mutex_unlock(&sc->mutex);
return;
}
if (ath9k_wiphy_started(sc)) {
mutex_unlock(&sc->mutex);
return; /* another wiphy still in use */
}
/* Ensure HW is awake when we try to shut it down. */
ath9k_ps_wakeup(sc);
if (ah->btcoex_hw.enabled) {
ath9k_hw_btcoex_disable(ah);
if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
ath9k_btcoex_timer_pause(sc);
}
/* make sure h/w will not generate any interrupt
* before setting the invalid flag. */
ath9k_hw_set_interrupts(ah, 0);
if (!(sc->sc_flags & SC_OP_INVALID)) {
ath_drain_all_txq(sc, false);
ath_stoprecv(sc);
ath9k_hw_phy_disable(ah);
} else
sc->rx.rxlink = NULL;
/* disable HAL and put h/w to sleep */
ath9k_hw_disable(ah);
ath9k_hw_configpcipowersave(ah, 1, 1);
ath9k_ps_restore(sc);
/* Finally, put the chip in FULL SLEEP mode */
ath9k_setpower(sc, ATH9K_PM_FULL_SLEEP);
sc->sc_flags |= SC_OP_INVALID;
mutex_unlock(&sc->mutex);
ath_print(common, ATH_DBG_CONFIG, "Driver halt\n");
}
static int ath9k_add_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ath_vif *avp = (void *)vif->drv_priv;
enum nl80211_iftype ic_opmode = NL80211_IFTYPE_UNSPECIFIED;
int ret = 0;
mutex_lock(&sc->mutex);
if (!(ah->caps.hw_caps & ATH9K_HW_CAP_BSSIDMASK) &&
sc->nvifs > 0) {
ret = -ENOBUFS;
goto out;
}
switch (vif->type) {
case NL80211_IFTYPE_STATION:
ic_opmode = NL80211_IFTYPE_STATION;
break;
case NL80211_IFTYPE_ADHOC:
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_MESH_POINT:
if (sc->nbcnvifs >= ATH_BCBUF) {
ret = -ENOBUFS;
goto out;
}
ic_opmode = vif->type;
break;
default:
ath_print(common, ATH_DBG_FATAL,
"Interface type %d not yet supported\n", vif->type);
ret = -EOPNOTSUPP;
goto out;
}
ath_print(common, ATH_DBG_CONFIG,
"Attach a VIF of type: %d\n", ic_opmode);
/* Set the VIF opmode */
avp->av_opmode = ic_opmode;
avp->av_bslot = -1;
sc->nvifs++;
if (ah->caps.hw_caps & ATH9K_HW_CAP_BSSIDMASK)
ath9k_set_bssid_mask(hw);
if (sc->nvifs > 1)
goto out; /* skip global settings for secondary vif */
if (ic_opmode == NL80211_IFTYPE_AP) {
ath9k_hw_set_tsfadjust(ah, 1);
sc->sc_flags |= SC_OP_TSF_RESET;
}
/* Set the device opmode */
ah->opmode = ic_opmode;
/*
* Enable MIB interrupts when there are hardware phy counters.
* Note we only do this (at the moment) for station mode.
*/
if ((vif->type == NL80211_IFTYPE_STATION) ||
(vif->type == NL80211_IFTYPE_ADHOC) ||
(vif->type == NL80211_IFTYPE_MESH_POINT)) {
if (ah->config.enable_ani)
ah->imask |= ATH9K_INT_MIB;
ah->imask |= ATH9K_INT_TSFOOR;
}
ath9k_hw_set_interrupts(ah, ah->imask);
if (vif->type == NL80211_IFTYPE_AP ||
vif->type == NL80211_IFTYPE_ADHOC ||
vif->type == NL80211_IFTYPE_MONITOR)
ath_start_ani(common);
out:
mutex_unlock(&sc->mutex);
return ret;
}
static void ath9k_remove_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ath_vif *avp = (void *)vif->drv_priv;
int i;
ath_print(common, ATH_DBG_CONFIG, "Detach Interface\n");
mutex_lock(&sc->mutex);
/* Stop ANI */
del_timer_sync(&common->ani.timer);
/* Reclaim beacon resources */
if ((sc->sc_ah->opmode == NL80211_IFTYPE_AP) ||
(sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC) ||
(sc->sc_ah->opmode == NL80211_IFTYPE_MESH_POINT)) {
ath9k_ps_wakeup(sc);
ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
ath9k_ps_restore(sc);
}
ath_beacon_return(sc, avp);
sc->sc_flags &= ~SC_OP_BEACONS;
for (i = 0; i < ARRAY_SIZE(sc->beacon.bslot); i++) {
if (sc->beacon.bslot[i] == vif) {
printk(KERN_DEBUG "%s: vif had allocated beacon "
"slot\n", __func__);
sc->beacon.bslot[i] = NULL;
sc->beacon.bslot_aphy[i] = NULL;
}
}
sc->nvifs--;
mutex_unlock(&sc->mutex);
}
void ath9k_enable_ps(struct ath_softc *sc)
{
struct ath_hw *ah = sc->sc_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, ah->imask);
}
}
ath9k_hw_setrxabort(ah, 1);
}
static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ieee80211_conf *conf = &hw->conf;
struct ath_hw *ah = sc->sc_ah;
bool disable_radio;
mutex_lock(&sc->mutex);
/*
* Leave this as the first check because we need to turn on the
* radio if it was disabled before prior to processing the rest
* of the changes. Likewise we must only disable the radio towards
* the end.
*/
if (changed & IEEE80211_CONF_CHANGE_IDLE) {
bool enable_radio;
bool all_wiphys_idle;
bool idle = !!(conf->flags & IEEE80211_CONF_IDLE);
spin_lock_bh(&sc->wiphy_lock);
all_wiphys_idle = ath9k_all_wiphys_idle(sc);
ath9k_set_wiphy_idle(aphy, idle);
enable_radio = (!idle && all_wiphys_idle);
/*
* After we unlock here its possible another wiphy
* can be re-renabled so to account for that we will
* only disable the radio toward the end of this routine
* if by then all wiphys are still idle.
*/
spin_unlock_bh(&sc->wiphy_lock);
if (enable_radio) {
sc->ps_idle = false;
ath_radio_enable(sc, hw);
ath_print(common, ATH_DBG_CONFIG,
"not-idle: enabling radio\n");
}
}
/*
* 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) {
if (conf->flags & IEEE80211_CONF_PS) {
sc->ps_flags |= PS_ENABLED;
/*
* At this point we know hardware has received an ACK
* of a previously sent null data frame.
*/
if ((sc->ps_flags & PS_NULLFUNC_COMPLETED)) {
sc->ps_flags &= ~PS_NULLFUNC_COMPLETED;
ath9k_enable_ps(sc);
}
} else {
sc->ps_enabled = false;
sc->ps_flags &= ~(PS_ENABLED |
PS_NULLFUNC_COMPLETED);
ath9k_setpower(sc, ATH9K_PM_AWAKE);
if (!(ah->caps.hw_caps &
ATH9K_HW_CAP_AUTOSLEEP)) {
ath9k_hw_setrxabort(sc->sc_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(sc->sc_ah,
ah->imask);
}
}
}
}
if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
if (conf->flags & IEEE80211_CONF_MONITOR) {
ath_print(common, ATH_DBG_CONFIG,
"HW opmode set to Monitor mode\n");
sc->sc_ah->opmode = NL80211_IFTYPE_MONITOR;
}
}
if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
struct ieee80211_channel *curchan = hw->conf.channel;
int pos = curchan->hw_value;
aphy->chan_idx = pos;
aphy->chan_is_ht = conf_is_ht(conf);
if (aphy->state == ATH_WIPHY_SCAN ||
aphy->state == ATH_WIPHY_ACTIVE)
ath9k_wiphy_pause_all_forced(sc, aphy);
else {
/*
* Do not change operational channel based on a paused
* wiphy changes.
*/
goto skip_chan_change;
}
ath_print(common, ATH_DBG_CONFIG, "Set channel: %d MHz\n",
curchan->center_freq);
/* XXX: remove me eventualy */
ath9k_update_ichannel(sc, hw, &sc->sc_ah->channels[pos]);
ath_update_chainmask(sc, conf_is_ht(conf));
if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) {
ath_print(common, ATH_DBG_FATAL,
"Unable to set channel\n");
mutex_unlock(&sc->mutex);
return -EINVAL;
}
}
skip_chan_change:
if (changed & IEEE80211_CONF_CHANGE_POWER) {
sc->config.txpowlimit = 2 * conf->power_level;
ath_update_txpow(sc);
}
spin_lock_bh(&sc->wiphy_lock);
disable_radio = ath9k_all_wiphys_idle(sc);
spin_unlock_bh(&sc->wiphy_lock);
if (disable_radio) {
ath_print(common, ATH_DBG_CONFIG, "idle: disabling radio\n");
sc->ps_idle = true;
ath_radio_disable(sc, hw);
}
mutex_unlock(&sc->mutex);
return 0;
}
#define SUPPORTED_FILTERS \
(FIF_PROMISC_IN_BSS | \
FIF_ALLMULTI | \
FIF_CONTROL | \
FIF_PSPOLL | \
FIF_OTHER_BSS | \
FIF_BCN_PRBRESP_PROMISC | \
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_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
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_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_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_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
ath_node_attach(sc, sta);
return 0;
}
static int ath9k_sta_remove(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
ath_node_detach(sc, sta);
return 0;
}
static int ath9k_conf_tx(struct ieee80211_hw *hw, u16 queue,
const struct ieee80211_tx_queue_params *params)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
struct ath9k_tx_queue_info qi;
int ret = 0, qnum;
if (queue >= WME_NUM_AC)
return 0;
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;
qnum = ath_get_hal_qnum(queue, sc);
ath_print(common, ATH_DBG_CONFIG,
"Configure tx [queue/halq] [%d/%d], "
"aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
queue, qnum, params->aifs, params->cw_min,
params->cw_max, params->txop);
ret = ath_txq_update(sc, qnum, &qi);
if (ret)
ath_print(common, ATH_DBG_FATAL, "TXQ Update failed\n");
if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)
if ((qnum == sc->tx.hwq_map[ATH9K_WME_AC_BE]) && !ret)
ath_beaconq_config(sc);
mutex_unlock(&sc->mutex);
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_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
int ret = 0;
if (modparam_nohwcrypt)
return -ENOSPC;
mutex_lock(&sc->mutex);
ath9k_ps_wakeup(sc);
ath_print(common, ATH_DBG_CONFIG, "Set HW Key\n");
switch (cmd) {
case SET_KEY:
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->alg == ALG_TKIP)
key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
if (sc->sc_ah->sw_mgmt_crypto && key->alg == ALG_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_bss_info_changed(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_bss_conf *bss_conf,
u32 changed)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
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;
int error;
mutex_lock(&sc->mutex);
if (changed & BSS_CHANGED_BSSID) {
/* Set BSSID */
memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
memcpy(avp->bssid, bss_conf->bssid, ETH_ALEN);
common->curaid = 0;
ath9k_hw_write_associd(ah);
/* Set aggregation protection mode parameters */
sc->config.ath_aggr_prot = 0;
/* Only legacy IBSS for now */
if (vif->type == NL80211_IFTYPE_ADHOC)
ath_update_chainmask(sc, 0);
ath_print(common, ATH_DBG_CONFIG,
"BSSID: %pM aid: 0x%x\n",
common->curbssid, common->curaid);
/* need to reconfigure the beacon */
sc->sc_flags &= ~SC_OP_BEACONS ;
}
/* Enable transmission of beacons (AP, IBSS, MESH) */
if ((changed & BSS_CHANGED_BEACON) ||
((changed & BSS_CHANGED_BEACON_ENABLED) && bss_conf->enable_beacon)) {
ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
error = ath_beacon_alloc(aphy, vif);
if (!error)
ath_beacon_config(sc, vif);
}
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);
}
}
/* Disable transmission of beacons */
if ((changed & BSS_CHANGED_BEACON_ENABLED) && !bss_conf->enable_beacon)
ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
if (changed & BSS_CHANGED_BEACON_INT) {
sc->beacon_interval = bss_conf->beacon_int;
/*
* In case of AP mode, the HW TSF has to be reset
* when the beacon interval changes.
*/
if (vif->type == NL80211_IFTYPE_AP) {
sc->sc_flags |= SC_OP_TSF_RESET;
ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
error = ath_beacon_alloc(aphy, vif);
if (!error)
ath_beacon_config(sc, vif);
} else {
ath_beacon_config(sc, vif);
}
}
if (changed & BSS_CHANGED_ERP_PREAMBLE) {
ath_print(common, ATH_DBG_CONFIG, "BSS Changed PREAMBLE %d\n",
bss_conf->use_short_preamble);
if (bss_conf->use_short_preamble)
sc->sc_flags |= SC_OP_PREAMBLE_SHORT;
else
sc->sc_flags &= ~SC_OP_PREAMBLE_SHORT;
}
if (changed & BSS_CHANGED_ERP_CTS_PROT) {
ath_print(common, ATH_DBG_CONFIG, "BSS Changed CTS PROT %d\n",
bss_conf->use_cts_prot);
if (bss_conf->use_cts_prot &&
hw->conf.channel->band != IEEE80211_BAND_5GHZ)
sc->sc_flags |= SC_OP_PROTECT_ENABLE;
else
sc->sc_flags &= ~SC_OP_PROTECT_ENABLE;
}
if (changed & BSS_CHANGED_ASSOC) {
ath_print(common, ATH_DBG_CONFIG, "BSS Changed ASSOC %d\n",
bss_conf->assoc);
ath9k_bss_assoc_info(sc, vif, bss_conf);
}
mutex_unlock(&sc->mutex);
}
static u64 ath9k_get_tsf(struct ieee80211_hw *hw)
{
u64 tsf;
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
mutex_lock(&sc->mutex);
tsf = ath9k_hw_gettsf64(sc->sc_ah);
mutex_unlock(&sc->mutex);
return tsf;
}
static void ath9k_set_tsf(struct ieee80211_hw *hw, u64 tsf)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
mutex_lock(&sc->mutex);
ath9k_hw_settsf64(sc->sc_ah, tsf);
mutex_unlock(&sc->mutex);
}
static void ath9k_reset_tsf(struct ieee80211_hw *hw)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
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)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
int ret = 0;
switch (action) {
case IEEE80211_AMPDU_RX_START:
if (!(sc->sc_flags & SC_OP_RXAGGR))
ret = -ENOTSUPP;
break;
case IEEE80211_AMPDU_RX_STOP:
break;
case IEEE80211_AMPDU_TX_START:
ath9k_ps_wakeup(sc);
ath_tx_aggr_start(sc, sta, tid, ssn);
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_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_FATAL,
"Unknown AMPDU action\n");
}
return ret;
}
static void ath9k_sw_scan_start(struct ieee80211_hw *hw)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
mutex_lock(&sc->mutex);
if (ath9k_wiphy_scanning(sc)) {
printk(KERN_DEBUG "ath9k: Two wiphys trying to scan at the "
"same time\n");
/*
* Do not allow the concurrent scanning state for now. This
* could be improved with scanning control moved into ath9k.
*/
mutex_unlock(&sc->mutex);
return;
}
aphy->state = ATH_WIPHY_SCAN;
ath9k_wiphy_pause_all_forced(sc, aphy);
sc->sc_flags |= SC_OP_SCANNING;
del_timer_sync(&common->ani.timer);
cancel_delayed_work_sync(&sc->tx_complete_work);
mutex_unlock(&sc->mutex);
}
static void ath9k_sw_scan_complete(struct ieee80211_hw *hw)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
mutex_lock(&sc->mutex);
aphy->state = ATH_WIPHY_ACTIVE;
sc->sc_flags &= ~SC_OP_SCANNING;
sc->sc_flags |= SC_OP_FULL_RESET;
ath_start_ani(common);
ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0);
ath_beacon_config(sc, NULL);
mutex_unlock(&sc->mutex);
}
static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
{
struct ath_wiphy *aphy = hw->priv;
struct ath_softc *sc = aphy->sc;
struct ath_hw *ah = sc->sc_ah;
mutex_lock(&sc->mutex);
ah->coverage_class = coverage_class;
ath9k_hw_init_global_settings(ah);
mutex_unlock(&sc->mutex);
}
struct ieee80211_ops ath9k_ops = {
.tx = ath9k_tx,
.start = ath9k_start,
.stop = ath9k_stop,
.add_interface = ath9k_add_interface,
.remove_interface = ath9k_remove_interface,
.config = ath9k_config,
.configure_filter = ath9k_configure_filter,
.sta_add = ath9k_sta_add,
.sta_remove = ath9k_sta_remove,
.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,
.sw_scan_start = ath9k_sw_scan_start,
.sw_scan_complete = ath9k_sw_scan_complete,
.rfkill_poll = ath9k_rfkill_poll_state,
.set_coverage_class = ath9k_set_coverage_class,
};
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