forked from Minki/linux
7a536265b0
It seems the wl18xx FW sometimes sends spurious changes on the PSM state of the broadcast HLID. This causes us to search for a station on a non-peer link and fail, causing warnings in our log. Prevent the driver from considering PSM changes for any non-peer HLIDs. Signed-off-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: Eliad Peller <eliad@wizery.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
337 lines
8.1 KiB
C
337 lines
8.1 KiB
C
/*
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* This file is part of wl1271
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*
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* Copyright (C) 2008-2009 Nokia Corporation
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*
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* Contact: Luciano Coelho <luciano.coelho@nokia.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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*/
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#include "ps.h"
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#include "io.h"
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#include "tx.h"
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#include "debug.h"
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#define WL1271_WAKEUP_TIMEOUT 500
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#define ELP_ENTRY_DELAY 30
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#define ELP_ENTRY_DELAY_FORCE_PS 5
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void wl1271_elp_work(struct work_struct *work)
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{
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struct delayed_work *dwork;
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struct wl1271 *wl;
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struct wl12xx_vif *wlvif;
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int ret;
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dwork = container_of(work, struct delayed_work, work);
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wl = container_of(dwork, struct wl1271, elp_work);
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wl1271_debug(DEBUG_PSM, "elp work");
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mutex_lock(&wl->mutex);
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if (unlikely(wl->state != WLCORE_STATE_ON))
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goto out;
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/* our work might have been already cancelled */
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if (unlikely(!test_bit(WL1271_FLAG_ELP_REQUESTED, &wl->flags)))
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goto out;
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if (test_bit(WL1271_FLAG_IN_ELP, &wl->flags))
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goto out;
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wl12xx_for_each_wlvif(wl, wlvif) {
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if (wlvif->bss_type == BSS_TYPE_AP_BSS)
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goto out;
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if (!test_bit(WLVIF_FLAG_IN_PS, &wlvif->flags) &&
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test_bit(WLVIF_FLAG_IN_USE, &wlvif->flags))
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goto out;
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}
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wl1271_debug(DEBUG_PSM, "chip to elp");
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ret = wlcore_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG, ELPCTRL_SLEEP);
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if (ret < 0) {
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wl12xx_queue_recovery_work(wl);
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goto out;
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}
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set_bit(WL1271_FLAG_IN_ELP, &wl->flags);
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out:
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mutex_unlock(&wl->mutex);
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}
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/* Routines to toggle sleep mode while in ELP */
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void wl1271_ps_elp_sleep(struct wl1271 *wl)
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{
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struct wl12xx_vif *wlvif;
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u32 timeout;
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/* We do not enter elp sleep in PLT mode */
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if (wl->plt)
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return;
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if (wl->sleep_auth != WL1271_PSM_ELP)
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return;
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/* we shouldn't get consecutive sleep requests */
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if (WARN_ON(test_and_set_bit(WL1271_FLAG_ELP_REQUESTED, &wl->flags)))
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return;
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wl12xx_for_each_wlvif(wl, wlvif) {
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if (wlvif->bss_type == BSS_TYPE_AP_BSS)
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return;
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if (!test_bit(WLVIF_FLAG_IN_PS, &wlvif->flags) &&
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test_bit(WLVIF_FLAG_IN_USE, &wlvif->flags))
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return;
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}
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timeout = wl->conf.conn.forced_ps ?
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ELP_ENTRY_DELAY_FORCE_PS : ELP_ENTRY_DELAY;
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ieee80211_queue_delayed_work(wl->hw, &wl->elp_work,
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msecs_to_jiffies(timeout));
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}
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int wl1271_ps_elp_wakeup(struct wl1271 *wl)
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{
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DECLARE_COMPLETION_ONSTACK(compl);
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unsigned long flags;
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int ret;
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unsigned long start_time = jiffies;
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bool pending = false;
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/*
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* we might try to wake up even if we didn't go to sleep
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* before (e.g. on boot)
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*/
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if (!test_and_clear_bit(WL1271_FLAG_ELP_REQUESTED, &wl->flags))
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return 0;
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/* don't cancel_sync as it might contend for a mutex and deadlock */
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cancel_delayed_work(&wl->elp_work);
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if (!test_bit(WL1271_FLAG_IN_ELP, &wl->flags))
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return 0;
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wl1271_debug(DEBUG_PSM, "waking up chip from elp");
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/*
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* The spinlock is required here to synchronize both the work and
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* the completion variable in one entity.
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*/
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spin_lock_irqsave(&wl->wl_lock, flags);
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if (test_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags))
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pending = true;
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else
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wl->elp_compl = &compl;
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spin_unlock_irqrestore(&wl->wl_lock, flags);
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ret = wlcore_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG, ELPCTRL_WAKE_UP);
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if (ret < 0) {
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wl12xx_queue_recovery_work(wl);
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goto err;
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}
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if (!pending) {
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ret = wait_for_completion_timeout(
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&compl, msecs_to_jiffies(WL1271_WAKEUP_TIMEOUT));
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if (ret == 0) {
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wl1271_error("ELP wakeup timeout!");
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wl12xx_queue_recovery_work(wl);
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ret = -ETIMEDOUT;
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goto err;
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}
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}
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clear_bit(WL1271_FLAG_IN_ELP, &wl->flags);
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wl1271_debug(DEBUG_PSM, "wakeup time: %u ms",
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jiffies_to_msecs(jiffies - start_time));
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goto out;
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err:
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spin_lock_irqsave(&wl->wl_lock, flags);
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wl->elp_compl = NULL;
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spin_unlock_irqrestore(&wl->wl_lock, flags);
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return ret;
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out:
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return 0;
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}
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int wl1271_ps_set_mode(struct wl1271 *wl, struct wl12xx_vif *wlvif,
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enum wl1271_cmd_ps_mode mode)
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{
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int ret;
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u16 timeout = wl->conf.conn.dynamic_ps_timeout;
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switch (mode) {
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case STATION_AUTO_PS_MODE:
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case STATION_POWER_SAVE_MODE:
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wl1271_debug(DEBUG_PSM, "entering psm (mode=%d,timeout=%u)",
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mode, timeout);
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ret = wl1271_acx_wake_up_conditions(wl, wlvif,
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wl->conf.conn.wake_up_event,
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wl->conf.conn.listen_interval);
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if (ret < 0) {
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wl1271_error("couldn't set wake up conditions");
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return ret;
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}
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ret = wl1271_cmd_ps_mode(wl, wlvif, mode, timeout);
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if (ret < 0)
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return ret;
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set_bit(WLVIF_FLAG_IN_PS, &wlvif->flags);
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/*
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* enable beacon early termination.
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* Not relevant for 5GHz and for high rates.
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*/
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if ((wlvif->band == IEEE80211_BAND_2GHZ) &&
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(wlvif->basic_rate < CONF_HW_BIT_RATE_9MBPS)) {
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ret = wl1271_acx_bet_enable(wl, wlvif, true);
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if (ret < 0)
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return ret;
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}
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break;
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case STATION_ACTIVE_MODE:
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wl1271_debug(DEBUG_PSM, "leaving psm");
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/* disable beacon early termination */
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if ((wlvif->band == IEEE80211_BAND_2GHZ) &&
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(wlvif->basic_rate < CONF_HW_BIT_RATE_9MBPS)) {
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ret = wl1271_acx_bet_enable(wl, wlvif, false);
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if (ret < 0)
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return ret;
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}
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ret = wl1271_cmd_ps_mode(wl, wlvif, mode, 0);
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if (ret < 0)
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return ret;
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clear_bit(WLVIF_FLAG_IN_PS, &wlvif->flags);
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break;
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default:
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wl1271_warning("trying to set ps to unsupported mode %d", mode);
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ret = -EINVAL;
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}
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return ret;
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}
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static void wl1271_ps_filter_frames(struct wl1271 *wl, u8 hlid)
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{
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int i;
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struct sk_buff *skb;
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struct ieee80211_tx_info *info;
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unsigned long flags;
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int filtered[NUM_TX_QUEUES];
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struct wl1271_link *lnk = &wl->links[hlid];
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/* filter all frames currently in the low level queues for this hlid */
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for (i = 0; i < NUM_TX_QUEUES; i++) {
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filtered[i] = 0;
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while ((skb = skb_dequeue(&lnk->tx_queue[i]))) {
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filtered[i]++;
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if (WARN_ON(wl12xx_is_dummy_packet(wl, skb)))
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continue;
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info = IEEE80211_SKB_CB(skb);
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info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
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info->status.rates[0].idx = -1;
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ieee80211_tx_status_ni(wl->hw, skb);
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}
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}
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spin_lock_irqsave(&wl->wl_lock, flags);
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for (i = 0; i < NUM_TX_QUEUES; i++) {
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wl->tx_queue_count[i] -= filtered[i];
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if (lnk->wlvif)
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lnk->wlvif->tx_queue_count[i] -= filtered[i];
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}
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spin_unlock_irqrestore(&wl->wl_lock, flags);
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wl1271_handle_tx_low_watermark(wl);
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}
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void wl12xx_ps_link_start(struct wl1271 *wl, struct wl12xx_vif *wlvif,
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u8 hlid, bool clean_queues)
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{
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struct ieee80211_sta *sta;
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struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
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if (WARN_ON_ONCE(wlvif->bss_type != BSS_TYPE_AP_BSS))
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return;
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if (!test_bit(hlid, wlvif->ap.sta_hlid_map) ||
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test_bit(hlid, &wl->ap_ps_map))
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return;
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wl1271_debug(DEBUG_PSM, "start mac80211 PSM on hlid %d pkts %d "
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"clean_queues %d", hlid, wl->links[hlid].allocated_pkts,
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clean_queues);
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rcu_read_lock();
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sta = ieee80211_find_sta(vif, wl->links[hlid].addr);
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if (!sta) {
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wl1271_error("could not find sta %pM for starting ps",
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wl->links[hlid].addr);
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rcu_read_unlock();
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return;
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}
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ieee80211_sta_ps_transition_ni(sta, true);
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rcu_read_unlock();
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/* do we want to filter all frames from this link's queues? */
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if (clean_queues)
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wl1271_ps_filter_frames(wl, hlid);
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__set_bit(hlid, &wl->ap_ps_map);
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}
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void wl12xx_ps_link_end(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 hlid)
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{
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struct ieee80211_sta *sta;
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struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
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if (!test_bit(hlid, &wl->ap_ps_map))
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return;
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wl1271_debug(DEBUG_PSM, "end mac80211 PSM on hlid %d", hlid);
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__clear_bit(hlid, &wl->ap_ps_map);
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rcu_read_lock();
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sta = ieee80211_find_sta(vif, wl->links[hlid].addr);
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if (!sta) {
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wl1271_error("could not find sta %pM for ending ps",
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wl->links[hlid].addr);
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goto end;
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}
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ieee80211_sta_ps_transition_ni(sta, false);
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end:
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rcu_read_unlock();
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}
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