Release 4.11 drivers/net/wireless/ath/ath9k/wow.c
/*
* Copyright (c) 2013 Qualcomm Atheros, 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 "ath9k.h"
static const struct wiphy_wowlan_support ath9k_wowlan_support_legacy = {
.flags = WIPHY_WOWLAN_MAGIC_PKT | WIPHY_WOWLAN_DISCONNECT,
.n_patterns = MAX_NUM_USER_PATTERN,
.pattern_min_len = 1,
.pattern_max_len = MAX_PATTERN_SIZE,
};
static const struct wiphy_wowlan_support ath9k_wowlan_support = {
.flags = WIPHY_WOWLAN_MAGIC_PKT | WIPHY_WOWLAN_DISCONNECT,
.n_patterns = MAX_NUM_PATTERN - 2,
.pattern_min_len = 1,
.pattern_max_len = MAX_PATTERN_SIZE,
};
static u8 ath9k_wow_map_triggers(struct ath_softc *sc,
struct cfg80211_wowlan *wowlan)
{
u8 wow_triggers = 0;
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;
return wow_triggers;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Sujith Manoharan | 56 | 100.00% | 2 | 100.00% |
| Total | 56 | 100.00% | 2 | 100.00% |
static int 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);
int pattern_count = 0;
int ret, i, byte_cnt = 0;
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
*/
/* 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 */
dis_deauth_mask[0] = 0xfe;
dis_deauth_mask[1] = 0x03;
dis_deauth_mask[2] = 0xc0;
ret = ath9k_hw_wow_apply_pattern(ah, dis_deauth_pattern, dis_deauth_mask,
pattern_count, byte_cnt);
if (ret)
goto exit;
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;
ret = ath9k_hw_wow_apply_pattern(ah, dis_deauth_pattern, dis_deauth_mask,
pattern_count, byte_cnt);
exit:
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Sujith Manoharan | 228 | 100.00% | 3 | 100.00% |
| Total | 228 | 100.00% | 3 | 100.00% |
static int ath9k_wow_add_pattern(struct ath_softc *sc,
struct cfg80211_wowlan *wowlan)
{
struct ath_hw *ah = sc->sc_ah;
struct cfg80211_pkt_pattern *patterns = wowlan->patterns;
u8 wow_pattern[MAX_PATTERN_SIZE];
u8 wow_mask[MAX_PATTERN_SIZE];
int mask_len, ret = 0;
s8 i = 0;
for (i = 0; i < wowlan->n_patterns; i++) {
mask_len = DIV_ROUND_UP(patterns[i].pattern_len, 8);
memset(wow_pattern, 0, MAX_PATTERN_SIZE);
memset(wow_mask, 0, MAX_PATTERN_SIZE);
memcpy(wow_pattern, patterns[i].pattern, patterns[i].pattern_len);
memcpy(wow_mask, patterns[i].mask, mask_len);
ret = ath9k_hw_wow_apply_pattern(ah,
wow_pattern,
wow_mask,
i + 2,
patterns[i].pattern_len);
if (ret)
break;
}
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Sujith Manoharan | 170 | 100.00% | 3 | 100.00% |
| Total | 170 | 100.00% | 3 | 100.00% |
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);
u8 triggers;
int ret = 0;
ath9k_deinit_channel_context(sc);
mutex_lock(&sc->mutex);
if (test_bit(ATH_OP_INVALID, &common->op_flags)) {
ath_err(common, "Device not present\n");
ret = -ENODEV;
goto fail_wow;
}
if (WARN_ON(!wowlan)) {
ath_err(common, "None of the WoW triggers enabled\n");
ret = -EINVAL;
goto fail_wow;
}
if (sc->cur_chan->nvifs > 1) {
ath_dbg(common, WOW, "WoW for multivif is not yet supported\n");
ret = 1;
goto fail_wow;
}
if (ath9k_is_chanctx_enabled()) {
if (test_bit(ATH_OP_MULTI_CHANNEL, &common->op_flags)) {
ath_dbg(common, WOW,
"Multi-channel WOW is not supported\n");
ret = 1;
goto fail_wow;
}
}
if (!test_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags)) {
ath_dbg(common, WOW, "None of the STA vifs are associated\n");
ret = 1;
goto fail_wow;
}
triggers = ath9k_wow_map_triggers(sc, wowlan);
if (!triggers) {
ath_dbg(common, WOW, "No valid WoW triggers\n");
ret = 1;
goto fail_wow;
}
ath_cancel_work(sc);
ath_stop_ani(sc);
ath9k_ps_wakeup(sc);
ath9k_stop_btcoex(sc);
/*
* Enable wake up on recieving disassoc/deauth
* frame by default.
*/
ret = ath9k_wow_add_disassoc_deauth_pattern(sc);
if (ret) {
ath_err(common,
"Unable to add disassoc/deauth pattern: %d\n", ret);
goto fail_wow;
}
if (triggers & AH_WOW_USER_PATTERN_EN) {
ret = ath9k_wow_add_pattern(sc, wowlan);
if (ret) {
ath_err(common,
"Unable to add user pattern: %d\n", ret);
goto fail_wow;
}
}
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, triggers);
ath9k_ps_restore(sc);
ath_dbg(common, WOW, "Suspend with WoW triggers: 0x%x\n", triggers);
set_bit(ATH_OP_WOW_ENABLED, &common->op_flags);
fail_wow:
mutex_unlock(&sc->mutex);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Sujith Manoharan | 437 | 98.42% | 8 | 80.00% |
| Felix Fietkau | 4 | 0.90% | 1 | 10.00% |
| Oleksij Rempel | 3 | 0.68% | 1 | 10.00% |
| Total | 444 | 100.00% | 10 | 100.00% |
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);
u8 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);
status = ath9k_hw_wow_wakeup(ah);
ath_dbg(common, WOW, "Resume with WoW status: 0x%x\n", status);
ath_restart_work(sc);
ath9k_start_btcoex(sc);
clear_bit(ATH_OP_WOW_ENABLED, &common->op_flags);
ath9k_ps_restore(sc);
mutex_unlock(&sc->mutex);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Sujith Manoharan | 147 | 100.00% | 3 | 100.00% |
| Total | 147 | 100.00% | 3 | 100.00% |
void ath9k_set_wakeup(struct ieee80211_hw *hw, bool enabled)
{
struct ath_softc *sc = hw->priv;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
mutex_lock(&sc->mutex);
device_set_wakeup_enable(sc->dev, enabled);
mutex_unlock(&sc->mutex);
ath_dbg(common, WOW, "WoW wakeup source is %s\n",
(enabled) ? "enabled" : "disabled");
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Sujith Manoharan | 76 | 100.00% | 2 | 100.00% |
| Total | 76 | 100.00% | 2 | 100.00% |
void ath9k_init_wow(struct ieee80211_hw *hw)
{
struct ath_softc *sc = hw->priv;
struct ath_hw *ah = sc->sc_ah;
if ((sc->driver_data & ATH9K_PCI_WOW) || sc->force_wow) {
if (AR_SREV_9462_20_OR_LATER(ah) || AR_SREV_9565_11_OR_LATER(ah))
hw->wiphy->wowlan = &ath9k_wowlan_support;
else
hw->wiphy->wowlan = &ath9k_wowlan_support_legacy;
device_init_wakeup(sc->dev, 1);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Sujith Manoharan | 84 | 100.00% | 4 | 100.00% |
| Total | 84 | 100.00% | 4 | 100.00% |
void ath9k_deinit_wow(struct ieee80211_hw *hw)
{
struct ath_softc *sc = hw->priv;
if ((sc->driver_data & ATH9K_PCI_WOW) || sc->force_wow)
device_init_wakeup(sc->dev, 0);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Sujith Manoharan | 42 | 100.00% | 3 | 100.00% |
| Total | 42 | 100.00% | 3 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Sujith Manoharan | 1306 | 99.47% | 14 | 87.50% |
| Felix Fietkau | 4 | 0.30% | 1 | 6.25% |
| Oleksij Rempel | 3 | 0.23% | 1 | 6.25% |
| Total | 1313 | 100.00% | 16 | 100.00% |
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