forked from Minki/linux
47684808fd
In AP mode we register for the MAX_TX_RETRY and INACTIVE_STA events. Both are reported to the upper layers as a TX failure in the offending stations. In STA mode we register only for the MAX_TX_RETRY event. A TX failure is interpreted as a loss of connection. Support for IEEE80211_HW_REPORTS_TX_ACK_STATUS has been removed to avoid the inherent race condition of a mac80211 TX failure counter in addition to the FW counter. This patch depends on "mac80211: allow low level driver to report packet loss" Signed-off-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
335 lines
8.5 KiB
C
335 lines
8.5 KiB
C
/*
|
|
* 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 "reg.h"
|
|
#include "io.h"
|
|
#include "event.h"
|
|
#include "ps.h"
|
|
#include "scan.h"
|
|
#include "wl12xx_80211.h"
|
|
|
|
void wl1271_pspoll_work(struct work_struct *work)
|
|
{
|
|
struct delayed_work *dwork;
|
|
struct wl1271 *wl;
|
|
int ret;
|
|
|
|
dwork = container_of(work, struct delayed_work, work);
|
|
wl = container_of(dwork, struct wl1271, pspoll_work);
|
|
|
|
wl1271_debug(DEBUG_EVENT, "pspoll work");
|
|
|
|
mutex_lock(&wl->mutex);
|
|
|
|
if (unlikely(wl->state == WL1271_STATE_OFF))
|
|
goto out;
|
|
|
|
if (!test_and_clear_bit(WL1271_FLAG_PSPOLL_FAILURE, &wl->flags))
|
|
goto out;
|
|
|
|
if (!test_bit(WL1271_FLAG_STA_ASSOCIATED, &wl->flags))
|
|
goto out;
|
|
|
|
/*
|
|
* if we end up here, then we were in powersave when the pspoll
|
|
* delivery failure occurred, and no-one changed state since, so
|
|
* we should go back to powersave.
|
|
*/
|
|
ret = wl1271_ps_elp_wakeup(wl);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
wl1271_ps_set_mode(wl, STATION_POWER_SAVE_MODE, wl->basic_rate, true);
|
|
|
|
wl1271_ps_elp_sleep(wl);
|
|
out:
|
|
mutex_unlock(&wl->mutex);
|
|
};
|
|
|
|
static void wl1271_event_pspoll_delivery_fail(struct wl1271 *wl)
|
|
{
|
|
int delay = wl->conf.conn.ps_poll_recovery_period;
|
|
int ret;
|
|
|
|
wl->ps_poll_failures++;
|
|
if (wl->ps_poll_failures == 1)
|
|
wl1271_info("AP with dysfunctional ps-poll, "
|
|
"trying to work around it.");
|
|
|
|
/* force active mode receive data from the AP */
|
|
if (test_bit(WL1271_FLAG_PSM, &wl->flags)) {
|
|
ret = wl1271_ps_set_mode(wl, STATION_ACTIVE_MODE,
|
|
wl->basic_rate, true);
|
|
if (ret < 0)
|
|
return;
|
|
set_bit(WL1271_FLAG_PSPOLL_FAILURE, &wl->flags);
|
|
ieee80211_queue_delayed_work(wl->hw, &wl->pspoll_work,
|
|
msecs_to_jiffies(delay));
|
|
}
|
|
|
|
/*
|
|
* If already in active mode, lets we should be getting data from
|
|
* the AP right away. If we enter PSM too fast after this, and data
|
|
* remains on the AP, we will get another event like this, and we'll
|
|
* go into active once more.
|
|
*/
|
|
}
|
|
|
|
static int wl1271_event_ps_report(struct wl1271 *wl,
|
|
struct event_mailbox *mbox,
|
|
bool *beacon_loss)
|
|
{
|
|
int ret = 0;
|
|
u32 total_retries = wl->conf.conn.psm_entry_retries;
|
|
|
|
wl1271_debug(DEBUG_EVENT, "ps_status: 0x%x", mbox->ps_status);
|
|
|
|
switch (mbox->ps_status) {
|
|
case EVENT_ENTER_POWER_SAVE_FAIL:
|
|
wl1271_debug(DEBUG_PSM, "PSM entry failed");
|
|
|
|
if (!test_bit(WL1271_FLAG_PSM, &wl->flags)) {
|
|
/* remain in active mode */
|
|
wl->psm_entry_retry = 0;
|
|
break;
|
|
}
|
|
|
|
if (wl->psm_entry_retry < total_retries) {
|
|
wl->psm_entry_retry++;
|
|
ret = wl1271_ps_set_mode(wl, STATION_POWER_SAVE_MODE,
|
|
wl->basic_rate, true);
|
|
} else {
|
|
wl1271_info("No ack to nullfunc from AP.");
|
|
wl->psm_entry_retry = 0;
|
|
*beacon_loss = true;
|
|
}
|
|
break;
|
|
case EVENT_ENTER_POWER_SAVE_SUCCESS:
|
|
wl->psm_entry_retry = 0;
|
|
|
|
/* enable beacon filtering */
|
|
ret = wl1271_acx_beacon_filter_opt(wl, true);
|
|
if (ret < 0)
|
|
break;
|
|
|
|
/* enable beacon early termination */
|
|
ret = wl1271_acx_bet_enable(wl, true);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void wl1271_event_rssi_trigger(struct wl1271 *wl,
|
|
struct event_mailbox *mbox)
|
|
{
|
|
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 <= wl->rssi_thold)
|
|
event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
|
|
else
|
|
event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
|
|
|
|
if (event != wl->last_rssi_event)
|
|
ieee80211_cqm_rssi_notify(wl->vif, event, GFP_KERNEL);
|
|
wl->last_rssi_event = event;
|
|
}
|
|
|
|
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)
|
|
{
|
|
int ret;
|
|
u32 vector;
|
|
bool beacon_loss = false;
|
|
bool is_ap = (wl->bss_type == BSS_TYPE_AP_BSS);
|
|
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);
|
|
}
|
|
|
|
/* disable dynamic PS when requested by the firmware */
|
|
if (vector & SOFT_GEMINI_SENSE_EVENT_ID &&
|
|
wl->bss_type == BSS_TYPE_STA_BSS) {
|
|
if (mbox->soft_gemini_sense_info)
|
|
ieee80211_disable_dyn_ps(wl->vif);
|
|
else
|
|
ieee80211_enable_dyn_ps(wl->vif);
|
|
}
|
|
|
|
/*
|
|
* 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) && !is_ap) {
|
|
wl1271_info("Beacon loss detected.");
|
|
|
|
/* indicate to the stack, that beacons have been lost */
|
|
beacon_loss = true;
|
|
}
|
|
|
|
if ((vector & PS_REPORT_EVENT_ID) && !is_ap) {
|
|
wl1271_debug(DEBUG_EVENT, "PS_REPORT_EVENT");
|
|
ret = wl1271_event_ps_report(wl, mbox, &beacon_loss);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
if ((vector & PSPOLL_DELIVERY_FAILURE_EVENT_ID) && !is_ap)
|
|
wl1271_event_pspoll_delivery_fail(wl);
|
|
|
|
if (vector & RSSI_SNR_TRIGGER_0_EVENT_ID) {
|
|
wl1271_debug(DEBUG_EVENT, "RSSI_SNR_TRIGGER_0_EVENT");
|
|
if (wl->vif)
|
|
wl1271_event_rssi_trigger(wl, mbox);
|
|
}
|
|
|
|
if ((vector & DUMMY_PACKET_EVENT_ID) && !is_ap) {
|
|
wl1271_debug(DEBUG_EVENT, "DUMMY_PACKET_ID_EVENT_ID");
|
|
if (wl->vif)
|
|
wl1271_tx_dummy_packet(wl);
|
|
}
|
|
|
|
/*
|
|
* "TX retries exceeded" has a different meaning according to mode.
|
|
* In AP mode the offending station is disconnected. In STA mode we
|
|
* report connection loss.
|
|
*/
|
|
if (vector & MAX_TX_RETRY_EVENT_ID) {
|
|
wl1271_debug(DEBUG_EVENT, "MAX_TX_RETRY_EVENT_ID");
|
|
if (is_ap) {
|
|
sta_bitmap |= le16_to_cpu(mbox->sta_tx_retry_exceeded);
|
|
disconnect_sta = true;
|
|
} else {
|
|
beacon_loss = true;
|
|
}
|
|
}
|
|
|
|
if ((vector & INACTIVE_STA_EVENT_ID) && is_ap) {
|
|
wl1271_debug(DEBUG_EVENT, "INACTIVE_STA_EVENT_ID");
|
|
sta_bitmap |= le16_to_cpu(mbox->sta_aging_status);
|
|
disconnect_sta = true;
|
|
}
|
|
|
|
if (wl->vif && beacon_loss)
|
|
ieee80211_connection_loss(wl->vif);
|
|
|
|
if (is_ap && disconnect_sta) {
|
|
u32 num_packets = wl->conf.tx.max_tx_retries;
|
|
struct ieee80211_sta *sta;
|
|
const u8 *addr;
|
|
int h;
|
|
|
|
for (h = find_first_bit(&sta_bitmap, AP_MAX_LINKS);
|
|
h < AP_MAX_LINKS;
|
|
h = find_next_bit(&sta_bitmap, AP_MAX_LINKS, h+1)) {
|
|
if (!wl1271_is_active_sta(wl, h))
|
|
continue;
|
|
|
|
addr = wl->links[h].addr;
|
|
|
|
rcu_read_lock();
|
|
sta = ieee80211_find_sta(wl->vif, addr);
|
|
if (sta) {
|
|
wl1271_debug(DEBUG_EVENT, "remove sta %d", h);
|
|
ieee80211_report_low_ack(sta, num_packets);
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
}
|
|
|
|
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)
|
|
{
|
|
struct event_mailbox mbox;
|
|
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], &mbox,
|
|
sizeof(struct event_mailbox), false);
|
|
|
|
/* process the descriptor */
|
|
ret = wl1271_event_process(wl, &mbox);
|
|
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;
|
|
}
|