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path: root/drivers/net/wireless/ti/wl12xx/event.c
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-rw-r--r--drivers/net/wireless/ti/wl12xx/event.c313
1 files changed, 313 insertions, 0 deletions
diff --git a/drivers/net/wireless/ti/wl12xx/event.c b/drivers/net/wireless/ti/wl12xx/event.c
new file mode 100644
index 000000000000..96f06a89c2a9
--- /dev/null
+++ b/drivers/net/wireless/ti/wl12xx/event.c
@@ -0,0 +1,313 @@
+/*
+ * This file is part of wl1271
+ *
+ * Copyright (C) 2008-2009 Nokia Corporation
+ *
+ * Contact: Luciano Coelho <luciano.coelho@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include "wl12xx.h"
+#include "debug.h"
+#include "reg.h"
+#include "io.h"
+#include "event.h"
+#include "ps.h"
+#include "scan.h"
+#include "wl12xx_80211.h"
+
+static void wl1271_event_rssi_trigger(struct wl1271 *wl,
+ struct wl12xx_vif *wlvif,
+ struct event_mailbox *mbox)
+{
+ struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
+ enum nl80211_cqm_rssi_threshold_event event;
+ s8 metric = mbox->rssi_snr_trigger_metric[0];
+
+ wl1271_debug(DEBUG_EVENT, "RSSI trigger metric: %d", metric);
+
+ if (metric <= wlvif->rssi_thold)
+ event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
+ else
+ event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
+
+ if (event != wlvif->last_rssi_event)
+ ieee80211_cqm_rssi_notify(vif, event, GFP_KERNEL);
+ wlvif->last_rssi_event = event;
+}
+
+static void wl1271_stop_ba_event(struct wl1271 *wl, struct wl12xx_vif *wlvif)
+{
+ struct ieee80211_vif *vif = wl12xx_wlvif_to_vif(wlvif);
+
+ if (wlvif->bss_type != BSS_TYPE_AP_BSS) {
+ if (!wlvif->sta.ba_rx_bitmap)
+ return;
+ ieee80211_stop_rx_ba_session(vif, wlvif->sta.ba_rx_bitmap,
+ vif->bss_conf.bssid);
+ } else {
+ u8 hlid;
+ struct wl1271_link *lnk;
+ for_each_set_bit(hlid, wlvif->ap.sta_hlid_map,
+ WL12XX_MAX_LINKS) {
+ lnk = &wl->links[hlid];
+ if (!lnk->ba_bitmap)
+ continue;
+
+ ieee80211_stop_rx_ba_session(vif,
+ lnk->ba_bitmap,
+ lnk->addr);
+ }
+ }
+}
+
+static void wl12xx_event_soft_gemini_sense(struct wl1271 *wl,
+ u8 enable)
+{
+ struct wl12xx_vif *wlvif;
+
+ if (enable) {
+ set_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags);
+ } else {
+ clear_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags);
+ wl12xx_for_each_wlvif_sta(wl, wlvif) {
+ wl1271_recalc_rx_streaming(wl, wlvif);
+ }
+ }
+
+}
+
+static void wl1271_event_mbox_dump(struct event_mailbox *mbox)
+{
+ wl1271_debug(DEBUG_EVENT, "MBOX DUMP:");
+ wl1271_debug(DEBUG_EVENT, "\tvector: 0x%x", mbox->events_vector);
+ wl1271_debug(DEBUG_EVENT, "\tmask: 0x%x", mbox->events_mask);
+}
+
+static int wl1271_event_process(struct wl1271 *wl)
+{
+ struct event_mailbox *mbox = wl->mbox;
+ struct ieee80211_vif *vif;
+ struct wl12xx_vif *wlvif;
+ u32 vector;
+ bool beacon_loss = false;
+ bool disconnect_sta = false;
+ unsigned long sta_bitmap = 0;
+
+ wl1271_event_mbox_dump(mbox);
+
+ vector = le32_to_cpu(mbox->events_vector);
+ vector &= ~(le32_to_cpu(mbox->events_mask));
+ wl1271_debug(DEBUG_EVENT, "vector: 0x%x", vector);
+
+ if (vector & SCAN_COMPLETE_EVENT_ID) {
+ wl1271_debug(DEBUG_EVENT, "status: 0x%x",
+ mbox->scheduled_scan_status);
+
+ wl1271_scan_stm(wl, wl->scan_vif);
+ }
+
+ if (vector & PERIODIC_SCAN_REPORT_EVENT_ID) {
+ wl1271_debug(DEBUG_EVENT, "PERIODIC_SCAN_REPORT_EVENT "
+ "(status 0x%0x)", mbox->scheduled_scan_status);
+
+ wl1271_scan_sched_scan_results(wl);
+ }
+
+ if (vector & PERIODIC_SCAN_COMPLETE_EVENT_ID) {
+ wl1271_debug(DEBUG_EVENT, "PERIODIC_SCAN_COMPLETE_EVENT "
+ "(status 0x%0x)", mbox->scheduled_scan_status);
+ if (wl->sched_scanning) {
+ ieee80211_sched_scan_stopped(wl->hw);
+ wl->sched_scanning = false;
+ }
+ }
+
+ if (vector & SOFT_GEMINI_SENSE_EVENT_ID)
+ wl12xx_event_soft_gemini_sense(wl,
+ mbox->soft_gemini_sense_info);
+
+ /*
+ * The BSS_LOSE_EVENT_ID is only needed while psm (and hence beacon
+ * filtering) is enabled. Without PSM, the stack will receive all
+ * beacons and can detect beacon loss by itself.
+ *
+ * As there's possibility that the driver disables PSM before receiving
+ * BSS_LOSE_EVENT, beacon loss has to be reported to the stack.
+ *
+ */
+ if (vector & BSS_LOSE_EVENT_ID) {
+ /* TODO: check for multi-role */
+ wl1271_info("Beacon loss detected.");
+
+ /* indicate to the stack, that beacons have been lost */
+ beacon_loss = true;
+ }
+
+ if (vector & RSSI_SNR_TRIGGER_0_EVENT_ID) {
+ /* TODO: check actual multi-role support */
+ wl1271_debug(DEBUG_EVENT, "RSSI_SNR_TRIGGER_0_EVENT");
+ wl12xx_for_each_wlvif_sta(wl, wlvif) {
+ wl1271_event_rssi_trigger(wl, wlvif, mbox);
+ }
+ }
+
+ if (vector & BA_SESSION_RX_CONSTRAINT_EVENT_ID) {
+ u8 role_id = mbox->role_id;
+ wl1271_debug(DEBUG_EVENT, "BA_SESSION_RX_CONSTRAINT_EVENT_ID. "
+ "ba_allowed = 0x%x, role_id=%d",
+ mbox->rx_ba_allowed, role_id);
+
+ wl12xx_for_each_wlvif(wl, wlvif) {
+ if (role_id != 0xff && role_id != wlvif->role_id)
+ continue;
+
+ wlvif->ba_allowed = !!mbox->rx_ba_allowed;
+ if (!wlvif->ba_allowed)
+ wl1271_stop_ba_event(wl, wlvif);
+ }
+ }
+
+ if (vector & CHANNEL_SWITCH_COMPLETE_EVENT_ID) {
+ wl1271_debug(DEBUG_EVENT, "CHANNEL_SWITCH_COMPLETE_EVENT_ID. "
+ "status = 0x%x",
+ mbox->channel_switch_status);
+ /*
+ * That event uses for two cases:
+ * 1) channel switch complete with status=0
+ * 2) channel switch failed status=1
+ */
+
+ /* TODO: configure only the relevant vif */
+ wl12xx_for_each_wlvif_sta(wl, wlvif) {
+ bool success;
+
+ if (!test_and_clear_bit(WLVIF_FLAG_CS_PROGRESS,
+ &wlvif->flags))
+ continue;
+
+ success = mbox->channel_switch_status ? false : true;
+ vif = wl12xx_wlvif_to_vif(wlvif);
+
+ ieee80211_chswitch_done(vif, success);
+ }
+ }
+
+ if ((vector & DUMMY_PACKET_EVENT_ID)) {
+ wl1271_debug(DEBUG_EVENT, "DUMMY_PACKET_ID_EVENT_ID");
+ wl1271_tx_dummy_packet(wl);
+ }
+
+ /*
+ * "TX retries exceeded" has a different meaning according to mode.
+ * In AP mode the offending station is disconnected.
+ */
+ if (vector & MAX_TX_RETRY_EVENT_ID) {
+ wl1271_debug(DEBUG_EVENT, "MAX_TX_RETRY_EVENT_ID");
+ sta_bitmap |= le16_to_cpu(mbox->sta_tx_retry_exceeded);
+ disconnect_sta = true;
+ }
+
+ if (vector & INACTIVE_STA_EVENT_ID) {
+ wl1271_debug(DEBUG_EVENT, "INACTIVE_STA_EVENT_ID");
+ sta_bitmap |= le16_to_cpu(mbox->sta_aging_status);
+ disconnect_sta = true;
+ }
+
+ if (disconnect_sta) {
+ u32 num_packets = wl->conf.tx.max_tx_retries;
+ struct ieee80211_sta *sta;
+ const u8 *addr;
+ int h;
+
+ for_each_set_bit(h, &sta_bitmap, WL12XX_MAX_LINKS) {
+ bool found = false;
+ /* find the ap vif connected to this sta */
+ wl12xx_for_each_wlvif_ap(wl, wlvif) {
+ if (!test_bit(h, wlvif->ap.sta_hlid_map))
+ continue;
+ found = true;
+ break;
+ }
+ if (!found)
+ continue;
+
+ vif = wl12xx_wlvif_to_vif(wlvif);
+ addr = wl->links[h].addr;
+
+ rcu_read_lock();
+ sta = ieee80211_find_sta(vif, addr);
+ if (sta) {
+ wl1271_debug(DEBUG_EVENT, "remove sta %d", h);
+ ieee80211_report_low_ack(sta, num_packets);
+ }
+ rcu_read_unlock();
+ }
+ }
+
+ if (beacon_loss)
+ wl12xx_for_each_wlvif_sta(wl, wlvif) {
+ vif = wl12xx_wlvif_to_vif(wlvif);
+ ieee80211_connection_loss(vif);
+ }
+
+ return 0;
+}
+
+int wl1271_event_unmask(struct wl1271 *wl)
+{
+ int ret;
+
+ ret = wl1271_acx_event_mbox_mask(wl, ~(wl->event_mask));
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+void wl1271_event_mbox_config(struct wl1271 *wl)
+{
+ wl->mbox_ptr[0] = wl1271_read32(wl, REG_EVENT_MAILBOX_PTR);
+ wl->mbox_ptr[1] = wl->mbox_ptr[0] + sizeof(struct event_mailbox);
+
+ wl1271_debug(DEBUG_EVENT, "MBOX ptrs: 0x%x 0x%x",
+ wl->mbox_ptr[0], wl->mbox_ptr[1]);
+}
+
+int wl1271_event_handle(struct wl1271 *wl, u8 mbox_num)
+{
+ int ret;
+
+ wl1271_debug(DEBUG_EVENT, "EVENT on mbox %d", mbox_num);
+
+ if (mbox_num > 1)
+ return -EINVAL;
+
+ /* first we read the mbox descriptor */
+ wl1271_read(wl, wl->mbox_ptr[mbox_num], wl->mbox,
+ sizeof(*wl->mbox), false);
+
+ /* process the descriptor */
+ ret = wl1271_event_process(wl);
+ if (ret < 0)
+ return ret;
+
+ /* then we let the firmware know it can go on...*/
+ wl1271_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_EVENT_ACK);
+
+ return 0;
+}