314 lines
8.1 KiB
C
314 lines
8.1 KiB
C
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/*
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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 "debug.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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static void wl1271_event_rssi_trigger(struct wl1271 *wl,
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struct wl12xx_vif *wlvif,
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struct event_mailbox *mbox)
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{
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struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
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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 <= wlvif->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 != wlvif->last_rssi_event)
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ieee80211_cqm_rssi_notify(vif, event, GFP_KERNEL);
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wlvif->last_rssi_event = event;
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}
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static void wl1271_stop_ba_event(struct wl1271 *wl, struct wl12xx_vif *wlvif)
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{
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struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
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if (wlvif->bss_type != BSS_TYPE_AP_BSS) {
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if (!wlvif->sta.ba_rx_bitmap)
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return;
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ieee80211_stop_rx_ba_session(vif, wlvif->sta.ba_rx_bitmap,
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vif->bss_conf.bssid);
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} else {
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u8 hlid;
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struct wl1271_link *lnk;
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for_each_set_bit(hlid, wlvif->ap.sta_hlid_map,
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WL12XX_MAX_LINKS) {
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lnk = &wl->links[hlid];
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if (!lnk->ba_bitmap)
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continue;
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ieee80211_stop_rx_ba_session(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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struct wl12xx_vif *wlvif;
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if (enable) {
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set_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags);
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} else {
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clear_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags);
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wl12xx_for_each_wlvif_sta(wl, wlvif) {
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wl1271_recalc_rx_streaming(wl, wlvif);
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}
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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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struct ieee80211_vif *vif;
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struct wl12xx_vif *wlvif;
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u32 vector;
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bool beacon_loss = false;
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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, wl->scan_vif);
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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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ieee80211_sched_scan_stopped(wl->hw);
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wl->sched_scanning = false;
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}
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}
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if (vector & SOFT_GEMINI_SENSE_EVENT_ID)
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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) {
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/* TODO: check for multi-role */
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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 & RSSI_SNR_TRIGGER_0_EVENT_ID) {
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/* TODO: check actual multi-role support */
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wl1271_debug(DEBUG_EVENT, "RSSI_SNR_TRIGGER_0_EVENT");
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wl12xx_for_each_wlvif_sta(wl, wlvif) {
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wl1271_event_rssi_trigger(wl, wlvif, mbox);
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}
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}
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if (vector & BA_SESSION_RX_CONSTRAINT_EVENT_ID) {
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u8 role_id = mbox->role_id;
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wl1271_debug(DEBUG_EVENT, "BA_SESSION_RX_CONSTRAINT_EVENT_ID. "
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"ba_allowed = 0x%x, role_id=%d",
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mbox->rx_ba_allowed, role_id);
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wl12xx_for_each_wlvif(wl, wlvif) {
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if (role_id != 0xff && role_id != wlvif->role_id)
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continue;
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wlvif->ba_allowed = !!mbox->rx_ba_allowed;
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if (!wlvif->ba_allowed)
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wl1271_stop_ba_event(wl, wlvif);
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}
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}
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if (vector & CHANNEL_SWITCH_COMPLETE_EVENT_ID) {
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wl1271_debug(DEBUG_EVENT, "CHANNEL_SWITCH_COMPLETE_EVENT_ID. "
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"status = 0x%x",
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mbox->channel_switch_status);
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/*
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* That event uses for two cases:
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* 1) channel switch complete with status=0
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* 2) channel switch failed status=1
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*/
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/* TODO: configure only the relevant vif */
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wl12xx_for_each_wlvif_sta(wl, wlvif) {
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bool success;
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if (!test_and_clear_bit(WLVIF_FLAG_CS_PROGRESS,
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&wl->flags))
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continue;
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success = mbox->channel_switch_status ? false : true;
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vif = wl12xx_wlvif_to_vif(wlvif);
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ieee80211_chswitch_done(vif, success);
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}
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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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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) {
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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) {
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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 (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_each_set_bit(h, &sta_bitmap, WL12XX_MAX_LINKS) {
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bool found = false;
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/* find the ap vif connected to this sta */
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wl12xx_for_each_wlvif_ap(wl, wlvif) {
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if (!test_bit(h, wlvif->ap.sta_hlid_map))
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continue;
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found = true;
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break;
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}
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if (!found)
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continue;
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vif = wl12xx_wlvif_to_vif(wlvif);
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addr = wl->links[h].addr;
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rcu_read_lock();
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sta = ieee80211_find_sta(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 (beacon_loss)
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wl12xx_for_each_wlvif_sta(wl, wlvif) {
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vif = wl12xx_wlvif_to_vif(wlvif);
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ieee80211_connection_loss(vif);
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}
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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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