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f4d3b6ab5e
Unblock the RX BA constraint event from firmware in AP mode as well. This allows us to stop RX BA sessions when the FW requests it. In addition refactor the handler for this event to make the flow clearer. Signed-off-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: Luciano Coelho <coelho@ti.com>
399 lines
10 KiB
C
399 lines
10 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 "wl12xx.h"
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#include "reg.h"
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#include "io.h"
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#include "event.h"
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#include "ps.h"
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#include "scan.h"
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#include "wl12xx_80211.h"
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void wl1271_pspoll_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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int ret;
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dwork = container_of(work, struct delayed_work, work);
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wl = container_of(dwork, struct wl1271, pspoll_work);
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wl1271_debug(DEBUG_EVENT, "pspoll work");
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mutex_lock(&wl->mutex);
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if (unlikely(wl->state == WL1271_STATE_OFF))
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goto out;
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if (!test_and_clear_bit(WL1271_FLAG_PSPOLL_FAILURE, &wl->flags))
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goto out;
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if (!test_bit(WL1271_FLAG_STA_ASSOCIATED, &wl->flags))
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goto out;
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/*
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* if we end up here, then we were in powersave when the pspoll
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* delivery failure occurred, and no-one changed state since, so
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* we should go back to powersave.
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*/
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ret = wl1271_ps_elp_wakeup(wl);
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if (ret < 0)
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goto out;
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wl1271_ps_set_mode(wl, STATION_POWER_SAVE_MODE, wl->basic_rate, true);
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wl1271_ps_elp_sleep(wl);
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out:
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mutex_unlock(&wl->mutex);
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};
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static void wl1271_event_pspoll_delivery_fail(struct wl1271 *wl)
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{
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int delay = wl->conf.conn.ps_poll_recovery_period;
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int ret;
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wl->ps_poll_failures++;
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if (wl->ps_poll_failures == 1)
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wl1271_info("AP with dysfunctional ps-poll, "
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"trying to work around it.");
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/* force active mode receive data from the AP */
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if (test_bit(WL1271_FLAG_PSM, &wl->flags)) {
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ret = wl1271_ps_set_mode(wl, STATION_ACTIVE_MODE,
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wl->basic_rate, true);
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if (ret < 0)
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return;
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set_bit(WL1271_FLAG_PSPOLL_FAILURE, &wl->flags);
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ieee80211_queue_delayed_work(wl->hw, &wl->pspoll_work,
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msecs_to_jiffies(delay));
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}
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/*
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* If already in active mode, lets we should be getting data from
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* the AP right away. If we enter PSM too fast after this, and data
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* remains on the AP, we will get another event like this, and we'll
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* go into active once more.
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*/
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}
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static int wl1271_event_ps_report(struct wl1271 *wl,
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struct event_mailbox *mbox,
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bool *beacon_loss)
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{
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int ret = 0;
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u32 total_retries = wl->conf.conn.psm_entry_retries;
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wl1271_debug(DEBUG_EVENT, "ps_status: 0x%x", mbox->ps_status);
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switch (mbox->ps_status) {
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case EVENT_ENTER_POWER_SAVE_FAIL:
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wl1271_debug(DEBUG_PSM, "PSM entry failed");
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if (!test_bit(WL1271_FLAG_PSM, &wl->flags)) {
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/* remain in active mode */
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wl->psm_entry_retry = 0;
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break;
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}
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if (wl->psm_entry_retry < total_retries) {
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wl->psm_entry_retry++;
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ret = wl1271_ps_set_mode(wl, STATION_POWER_SAVE_MODE,
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wl->basic_rate, true);
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} else {
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wl1271_info("No ack to nullfunc from AP.");
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wl->psm_entry_retry = 0;
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*beacon_loss = true;
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}
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break;
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case EVENT_ENTER_POWER_SAVE_SUCCESS:
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wl->psm_entry_retry = 0;
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/* enable beacon filtering */
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ret = wl1271_acx_beacon_filter_opt(wl, true);
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if (ret < 0)
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break;
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/*
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* BET has only a minor effect in 5GHz and masks
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* channel switch IEs, so we only enable BET on 2.4GHz
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*/
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if (wl->band == IEEE80211_BAND_2GHZ)
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/* enable beacon early termination */
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ret = wl1271_acx_bet_enable(wl, true);
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if (wl->ps_compl) {
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complete(wl->ps_compl);
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wl->ps_compl = NULL;
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}
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break;
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default:
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break;
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}
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return ret;
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}
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static void wl1271_event_rssi_trigger(struct wl1271 *wl,
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struct event_mailbox *mbox)
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{
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enum nl80211_cqm_rssi_threshold_event event;
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s8 metric = mbox->rssi_snr_trigger_metric[0];
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wl1271_debug(DEBUG_EVENT, "RSSI trigger metric: %d", metric);
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if (metric <= wl->rssi_thold)
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event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
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else
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event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
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if (event != wl->last_rssi_event)
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ieee80211_cqm_rssi_notify(wl->vif, event, GFP_KERNEL);
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wl->last_rssi_event = event;
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}
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static void wl1271_stop_ba_event(struct wl1271 *wl)
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{
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if (wl->bss_type != BSS_TYPE_AP_BSS) {
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if (!wl->ba_rx_bitmap)
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return;
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ieee80211_stop_rx_ba_session(wl->vif, wl->ba_rx_bitmap,
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wl->bssid);
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} else {
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int i;
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struct wl1271_link *lnk;
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for (i = WL1271_AP_STA_HLID_START; i < WL12XX_MAX_LINKS; i++) {
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lnk = &wl->links[i];
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if (!wl1271_is_active_sta(wl, i) || !lnk->ba_bitmap)
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continue;
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ieee80211_stop_rx_ba_session(wl->vif,
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lnk->ba_bitmap,
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lnk->addr);
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}
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}
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}
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static void wl12xx_event_soft_gemini_sense(struct wl1271 *wl,
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u8 enable)
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{
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if (enable) {
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/* disable dynamic PS when requested by the firmware */
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ieee80211_disable_dyn_ps(wl->vif);
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set_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags);
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} else {
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ieee80211_enable_dyn_ps(wl->vif);
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clear_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags);
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wl1271_recalc_rx_streaming(wl);
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}
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}
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static void wl1271_event_mbox_dump(struct event_mailbox *mbox)
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{
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wl1271_debug(DEBUG_EVENT, "MBOX DUMP:");
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wl1271_debug(DEBUG_EVENT, "\tvector: 0x%x", mbox->events_vector);
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wl1271_debug(DEBUG_EVENT, "\tmask: 0x%x", mbox->events_mask);
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}
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static int wl1271_event_process(struct wl1271 *wl, struct event_mailbox *mbox)
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{
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int ret;
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u32 vector;
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bool beacon_loss = false;
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bool is_ap = (wl->bss_type == BSS_TYPE_AP_BSS);
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bool disconnect_sta = false;
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unsigned long sta_bitmap = 0;
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wl1271_event_mbox_dump(mbox);
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vector = le32_to_cpu(mbox->events_vector);
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vector &= ~(le32_to_cpu(mbox->events_mask));
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wl1271_debug(DEBUG_EVENT, "vector: 0x%x", vector);
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if (vector & SCAN_COMPLETE_EVENT_ID) {
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wl1271_debug(DEBUG_EVENT, "status: 0x%x",
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mbox->scheduled_scan_status);
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wl1271_scan_stm(wl);
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}
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if (vector & PERIODIC_SCAN_REPORT_EVENT_ID) {
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wl1271_debug(DEBUG_EVENT, "PERIODIC_SCAN_REPORT_EVENT "
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"(status 0x%0x)", mbox->scheduled_scan_status);
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wl1271_scan_sched_scan_results(wl);
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}
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if (vector & PERIODIC_SCAN_COMPLETE_EVENT_ID) {
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wl1271_debug(DEBUG_EVENT, "PERIODIC_SCAN_COMPLETE_EVENT "
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"(status 0x%0x)", mbox->scheduled_scan_status);
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if (wl->sched_scanning) {
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wl1271_scan_sched_scan_stop(wl);
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ieee80211_sched_scan_stopped(wl->hw);
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}
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}
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if (vector & SOFT_GEMINI_SENSE_EVENT_ID &&
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wl->bss_type == BSS_TYPE_STA_BSS)
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wl12xx_event_soft_gemini_sense(wl,
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mbox->soft_gemini_sense_info);
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/*
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* The BSS_LOSE_EVENT_ID is only needed while psm (and hence beacon
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* filtering) is enabled. Without PSM, the stack will receive all
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* beacons and can detect beacon loss by itself.
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*
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* As there's possibility that the driver disables PSM before receiving
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* BSS_LOSE_EVENT, beacon loss has to be reported to the stack.
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*
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*/
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if ((vector & BSS_LOSE_EVENT_ID) && !is_ap) {
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wl1271_info("Beacon loss detected.");
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/* indicate to the stack, that beacons have been lost */
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beacon_loss = true;
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}
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if ((vector & PS_REPORT_EVENT_ID) && !is_ap) {
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wl1271_debug(DEBUG_EVENT, "PS_REPORT_EVENT");
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ret = wl1271_event_ps_report(wl, mbox, &beacon_loss);
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if (ret < 0)
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return ret;
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}
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if ((vector & PSPOLL_DELIVERY_FAILURE_EVENT_ID) && !is_ap)
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wl1271_event_pspoll_delivery_fail(wl);
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if (vector & RSSI_SNR_TRIGGER_0_EVENT_ID) {
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wl1271_debug(DEBUG_EVENT, "RSSI_SNR_TRIGGER_0_EVENT");
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if (wl->vif)
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wl1271_event_rssi_trigger(wl, mbox);
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}
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if ((vector & BA_SESSION_RX_CONSTRAINT_EVENT_ID)) {
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wl1271_debug(DEBUG_EVENT, "BA_SESSION_RX_CONSTRAINT_EVENT_ID. "
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"ba_allowed = 0x%x", mbox->rx_ba_allowed);
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wl->ba_allowed = !!mbox->rx_ba_allowed;
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if (wl->vif && !wl->ba_allowed)
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wl1271_stop_ba_event(wl);
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}
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if ((vector & DUMMY_PACKET_EVENT_ID)) {
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wl1271_debug(DEBUG_EVENT, "DUMMY_PACKET_ID_EVENT_ID");
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if (wl->vif)
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wl1271_tx_dummy_packet(wl);
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}
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/*
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* "TX retries exceeded" has a different meaning according to mode.
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* In AP mode the offending station is disconnected.
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*/
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if ((vector & MAX_TX_RETRY_EVENT_ID) && is_ap) {
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wl1271_debug(DEBUG_EVENT, "MAX_TX_RETRY_EVENT_ID");
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sta_bitmap |= le16_to_cpu(mbox->sta_tx_retry_exceeded);
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disconnect_sta = true;
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}
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if ((vector & INACTIVE_STA_EVENT_ID) && is_ap) {
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wl1271_debug(DEBUG_EVENT, "INACTIVE_STA_EVENT_ID");
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sta_bitmap |= le16_to_cpu(mbox->sta_aging_status);
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disconnect_sta = true;
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}
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if (is_ap && disconnect_sta) {
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u32 num_packets = wl->conf.tx.max_tx_retries;
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struct ieee80211_sta *sta;
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const u8 *addr;
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int h;
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for (h = find_first_bit(&sta_bitmap, AP_MAX_LINKS);
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h < AP_MAX_LINKS;
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h = find_next_bit(&sta_bitmap, AP_MAX_LINKS, h+1)) {
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if (!wl1271_is_active_sta(wl, h))
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continue;
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addr = wl->links[h].addr;
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rcu_read_lock();
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sta = ieee80211_find_sta(wl->vif, addr);
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if (sta) {
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wl1271_debug(DEBUG_EVENT, "remove sta %d", h);
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ieee80211_report_low_ack(sta, num_packets);
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}
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rcu_read_unlock();
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}
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}
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if (wl->vif && beacon_loss)
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ieee80211_connection_loss(wl->vif);
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return 0;
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}
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int wl1271_event_unmask(struct wl1271 *wl)
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{
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int ret;
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ret = wl1271_acx_event_mbox_mask(wl, ~(wl->event_mask));
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if (ret < 0)
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return ret;
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return 0;
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}
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void wl1271_event_mbox_config(struct wl1271 *wl)
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{
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wl->mbox_ptr[0] = wl1271_read32(wl, REG_EVENT_MAILBOX_PTR);
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wl->mbox_ptr[1] = wl->mbox_ptr[0] + sizeof(struct event_mailbox);
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wl1271_debug(DEBUG_EVENT, "MBOX ptrs: 0x%x 0x%x",
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wl->mbox_ptr[0], wl->mbox_ptr[1]);
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}
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int wl1271_event_handle(struct wl1271 *wl, u8 mbox_num)
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{
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struct event_mailbox mbox;
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int ret;
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wl1271_debug(DEBUG_EVENT, "EVENT on mbox %d", mbox_num);
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if (mbox_num > 1)
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return -EINVAL;
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/* first we read the mbox descriptor */
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wl1271_read(wl, wl->mbox_ptr[mbox_num], &mbox,
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sizeof(struct event_mailbox), false);
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/* process the descriptor */
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ret = wl1271_event_process(wl, &mbox);
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if (ret < 0)
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return ret;
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/* then we let the firmware know it can go on...*/
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wl1271_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_EVENT_ACK);
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return 0;
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}
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