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linux/drivers/net/wireless/cw1200/sta.c
Emmanuel Grumbach 77be2c54c5 mac80211: add vif to flush call 
This will allow the low level driver to make decision based
on the vif such as queues etc...
Since the vif might be NULL, we can't add it to the tracing
functions.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
[fix staging rtl8821ae driver]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-04-09 10:55:29 +02:00

2403 lines
64 KiB
C
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/*
* Mac80211 STA API for ST-Ericsson CW1200 drivers
*
* Copyright (c) 2010, ST-Ericsson
* Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
*
* 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.
*/
#include <linux/vmalloc.h>
#include <linux/sched.h>
#include <linux/firmware.h>
#include <linux/module.h>
#include <linux/etherdevice.h>
#include "cw1200.h"
#include "sta.h"
#include "fwio.h"
#include "bh.h"
#include "debug.h"
#ifndef ERP_INFO_BYTE_OFFSET
#define ERP_INFO_BYTE_OFFSET 2
#endif
static void cw1200_do_join(struct cw1200_common *priv);
static void cw1200_do_unjoin(struct cw1200_common *priv);
static int cw1200_upload_beacon(struct cw1200_common *priv);
static int cw1200_upload_pspoll(struct cw1200_common *priv);
static int cw1200_upload_null(struct cw1200_common *priv);
static int cw1200_upload_qosnull(struct cw1200_common *priv);
static int cw1200_start_ap(struct cw1200_common *priv);
static int cw1200_update_beaconing(struct cw1200_common *priv);
static int cw1200_enable_beaconing(struct cw1200_common *priv,
bool enable);
static void __cw1200_sta_notify(struct ieee80211_hw *dev,
struct ieee80211_vif *vif,
enum sta_notify_cmd notify_cmd,
int link_id);
static int __cw1200_flush(struct cw1200_common *priv, bool drop);
static inline void __cw1200_free_event_queue(struct list_head *list)
{
struct cw1200_wsm_event *event, *tmp;
list_for_each_entry_safe(event, tmp, list, link) {
list_del(&event->link);
kfree(event);
}
}
/* ******************************************************************** */
/* STA API */
int cw1200_start(struct ieee80211_hw *dev)
{
struct cw1200_common *priv = dev->priv;
int ret = 0;
cw1200_pm_stay_awake(&priv->pm_state, HZ);
mutex_lock(&priv->conf_mutex);
/* default EDCA */
WSM_EDCA_SET(&priv->edca, 0, 0x0002, 0x0003, 0x0007, 47, 0xc8, false);
WSM_EDCA_SET(&priv->edca, 1, 0x0002, 0x0007, 0x000f, 94, 0xc8, false);
WSM_EDCA_SET(&priv->edca, 2, 0x0003, 0x000f, 0x03ff, 0, 0xc8, false);
WSM_EDCA_SET(&priv->edca, 3, 0x0007, 0x000f, 0x03ff, 0, 0xc8, false);
ret = wsm_set_edca_params(priv, &priv->edca);
if (ret)
goto out;
ret = cw1200_set_uapsd_param(priv, &priv->edca);
if (ret)
goto out;
priv->setbssparams_done = false;
memcpy(priv->mac_addr, dev->wiphy->perm_addr, ETH_ALEN);
priv->mode = NL80211_IFTYPE_MONITOR;
priv->wep_default_key_id = -1;
priv->cqm_beacon_loss_count = 10;
ret = cw1200_setup_mac(priv);
if (ret)
goto out;
out:
mutex_unlock(&priv->conf_mutex);
return ret;
}
void cw1200_stop(struct ieee80211_hw *dev)
{
struct cw1200_common *priv = dev->priv;
LIST_HEAD(list);
int i;
wsm_lock_tx(priv);
while (down_trylock(&priv->scan.lock)) {
/* Scan is in progress. Force it to stop. */
priv->scan.req = NULL;
schedule();
}
up(&priv->scan.lock);
cancel_delayed_work_sync(&priv->scan.probe_work);
cancel_delayed_work_sync(&priv->scan.timeout);
cancel_delayed_work_sync(&priv->clear_recent_scan_work);
cancel_delayed_work_sync(&priv->join_timeout);
cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
cancel_work_sync(&priv->unjoin_work);
cancel_delayed_work_sync(&priv->link_id_gc_work);
flush_workqueue(priv->workqueue);
del_timer_sync(&priv->mcast_timeout);
mutex_lock(&priv->conf_mutex);
priv->mode = NL80211_IFTYPE_UNSPECIFIED;
priv->listening = false;
spin_lock(&priv->event_queue_lock);
list_splice_init(&priv->event_queue, &list);
spin_unlock(&priv->event_queue_lock);
__cw1200_free_event_queue(&list);
priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
priv->join_pending = false;
for (i = 0; i < 4; i++)
cw1200_queue_clear(&priv->tx_queue[i]);
mutex_unlock(&priv->conf_mutex);
tx_policy_clean(priv);
/* HACK! */
if (atomic_xchg(&priv->tx_lock, 1) != 1)
pr_debug("[STA] TX is force-unlocked due to stop request.\n");
wsm_unlock_tx(priv);
atomic_xchg(&priv->tx_lock, 0); /* for recovery to work */
}
static int cw1200_bssloss_mitigation = 1;
module_param(cw1200_bssloss_mitigation, int, 0644);
MODULE_PARM_DESC(cw1200_bssloss_mitigation, "BSS Loss mitigation. 0 == disabled, 1 == enabled (default)");
void __cw1200_cqm_bssloss_sm(struct cw1200_common *priv,
int init, int good, int bad)
{
int tx = 0;
priv->delayed_link_loss = 0;
cancel_work_sync(&priv->bss_params_work);
pr_debug("[STA] CQM BSSLOSS_SM: state: %d init %d good %d bad: %d txlock: %d uj: %d\n",
priv->bss_loss_state,
init, good, bad,
atomic_read(&priv->tx_lock),
priv->delayed_unjoin);
/* If we have a pending unjoin */
if (priv->delayed_unjoin)
return;
if (init) {
queue_delayed_work(priv->workqueue,
&priv->bss_loss_work,
HZ);
priv->bss_loss_state = 0;
/* Skip the confimration procedure in P2P case */
if (!priv->vif->p2p && !atomic_read(&priv->tx_lock))
tx = 1;
} else if (good) {
cancel_delayed_work_sync(&priv->bss_loss_work);
priv->bss_loss_state = 0;
queue_work(priv->workqueue, &priv->bss_params_work);
} else if (bad) {
/* XXX Should we just keep going until we time out? */
if (priv->bss_loss_state < 3)
tx = 1;
} else {
cancel_delayed_work_sync(&priv->bss_loss_work);
priv->bss_loss_state = 0;
}
/* Bypass mitigation if it's disabled */
if (!cw1200_bssloss_mitigation)
tx = 0;
/* Spit out a NULL packet to our AP if necessary */
if (tx) {
struct sk_buff *skb;
priv->bss_loss_state++;
skb = ieee80211_nullfunc_get(priv->hw, priv->vif);
WARN_ON(!skb);
if (skb)
cw1200_tx(priv->hw, NULL, skb);
}
}
int cw1200_add_interface(struct ieee80211_hw *dev,
struct ieee80211_vif *vif)
{
int ret;
struct cw1200_common *priv = dev->priv;
/* __le32 auto_calibration_mode = __cpu_to_le32(1); */
vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
IEEE80211_VIF_SUPPORTS_CQM_RSSI;
mutex_lock(&priv->conf_mutex);
if (priv->mode != NL80211_IFTYPE_MONITOR) {
mutex_unlock(&priv->conf_mutex);
return -EOPNOTSUPP;
}
switch (vif->type) {
case NL80211_IFTYPE_STATION:
case NL80211_IFTYPE_ADHOC:
case NL80211_IFTYPE_MESH_POINT:
case NL80211_IFTYPE_AP:
priv->mode = vif->type;
break;
default:
mutex_unlock(&priv->conf_mutex);
return -EOPNOTSUPP;
}
priv->vif = vif;
memcpy(priv->mac_addr, vif->addr, ETH_ALEN);
ret = cw1200_setup_mac(priv);
/* Enable auto-calibration */
/* Exception in subsequent channel switch; disabled.
* wsm_write_mib(priv, WSM_MIB_ID_SET_AUTO_CALIBRATION_MODE,
* &auto_calibration_mode, sizeof(auto_calibration_mode));
*/
mutex_unlock(&priv->conf_mutex);
return ret;
}
void cw1200_remove_interface(struct ieee80211_hw *dev,
struct ieee80211_vif *vif)
{
struct cw1200_common *priv = dev->priv;
struct wsm_reset reset = {
.reset_statistics = true,
};
int i;
mutex_lock(&priv->conf_mutex);
switch (priv->join_status) {
case CW1200_JOIN_STATUS_JOINING:
case CW1200_JOIN_STATUS_PRE_STA:
case CW1200_JOIN_STATUS_STA:
case CW1200_JOIN_STATUS_IBSS:
wsm_lock_tx(priv);
if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
wsm_unlock_tx(priv);
break;
case CW1200_JOIN_STATUS_AP:
for (i = 0; priv->link_id_map; ++i) {
if (priv->link_id_map & BIT(i)) {
reset.link_id = i;
wsm_reset(priv, &reset);
priv->link_id_map &= ~BIT(i);
}
}
memset(priv->link_id_db, 0, sizeof(priv->link_id_db));
priv->sta_asleep_mask = 0;
priv->enable_beacon = false;
priv->tx_multicast = false;
priv->aid0_bit_set = false;
priv->buffered_multicasts = false;
priv->pspoll_mask = 0;
reset.link_id = 0;
wsm_reset(priv, &reset);
break;
case CW1200_JOIN_STATUS_MONITOR:
cw1200_update_listening(priv, false);
break;
default:
break;
}
priv->vif = NULL;
priv->mode = NL80211_IFTYPE_MONITOR;
memset(priv->mac_addr, 0, ETH_ALEN);
memset(&priv->p2p_ps_modeinfo, 0, sizeof(priv->p2p_ps_modeinfo));
cw1200_free_keys(priv);
cw1200_setup_mac(priv);
priv->listening = false;
priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
if (!__cw1200_flush(priv, true))
wsm_unlock_tx(priv);
mutex_unlock(&priv->conf_mutex);
}
int cw1200_change_interface(struct ieee80211_hw *dev,
struct ieee80211_vif *vif,
enum nl80211_iftype new_type,
bool p2p)
{
int ret = 0;
pr_debug("change_interface new: %d (%d), old: %d (%d)\n", new_type,
p2p, vif->type, vif->p2p);
if (new_type != vif->type || vif->p2p != p2p) {
cw1200_remove_interface(dev, vif);
vif->type = new_type;
vif->p2p = p2p;
ret = cw1200_add_interface(dev, vif);
}
return ret;
}
int cw1200_config(struct ieee80211_hw *dev, u32 changed)
{
int ret = 0;
struct cw1200_common *priv = dev->priv;
struct ieee80211_conf *conf = &dev->conf;
pr_debug("CONFIG CHANGED: %08x\n", changed);
down(&priv->scan.lock);
mutex_lock(&priv->conf_mutex);
/* TODO: IEEE80211_CONF_CHANGE_QOS */
/* TODO: IEEE80211_CONF_CHANGE_LISTEN_INTERVAL */
if (changed & IEEE80211_CONF_CHANGE_POWER) {
priv->output_power = conf->power_level;
pr_debug("[STA] TX power: %d\n", priv->output_power);
wsm_set_output_power(priv, priv->output_power * 10);
}
if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) &&
(priv->channel != conf->chandef.chan)) {
struct ieee80211_channel *ch = conf->chandef.chan;
struct wsm_switch_channel channel = {
.channel_number = ch->hw_value,
};
pr_debug("[STA] Freq %d (wsm ch: %d).\n",
ch->center_freq, ch->hw_value);
/* __cw1200_flush() implicitly locks tx, if successful */
if (!__cw1200_flush(priv, false)) {
if (!wsm_switch_channel(priv, &channel)) {
ret = wait_event_timeout(priv->channel_switch_done,
!priv->channel_switch_in_progress,
3 * HZ);
if (ret) {
/* Already unlocks if successful */
priv->channel = ch;
ret = 0;
} else {
ret = -ETIMEDOUT;
}
} else {
/* Unlock if switch channel fails */
wsm_unlock_tx(priv);
}
}
}
if (changed & IEEE80211_CONF_CHANGE_PS) {
if (!(conf->flags & IEEE80211_CONF_PS))
priv->powersave_mode.mode = WSM_PSM_ACTIVE;
else if (conf->dynamic_ps_timeout <= 0)
priv->powersave_mode.mode = WSM_PSM_PS;
else
priv->powersave_mode.mode = WSM_PSM_FAST_PS;
/* Firmware requires that value for this 1-byte field must
* be specified in units of 500us. Values above the 128ms
* threshold are not supported.
*/
if (conf->dynamic_ps_timeout >= 0x80)
priv->powersave_mode.fast_psm_idle_period = 0xFF;
else
priv->powersave_mode.fast_psm_idle_period =
conf->dynamic_ps_timeout << 1;
if (priv->join_status == CW1200_JOIN_STATUS_STA &&
priv->bss_params.aid)
cw1200_set_pm(priv, &priv->powersave_mode);
}
if (changed & IEEE80211_CONF_CHANGE_MONITOR) {
/* TBD: It looks like it's transparent
* there's a monitor interface present -- use this
* to determine for example whether to calculate
* timestamps for packets or not, do not use instead
* of filter flags!
*/
}
if (changed & IEEE80211_CONF_CHANGE_IDLE) {
struct wsm_operational_mode mode = {
.power_mode = cw1200_power_mode,
.disable_more_flag_usage = true,
};
wsm_lock_tx(priv);
/* Disable p2p-dev mode forced by TX request */
if ((priv->join_status == CW1200_JOIN_STATUS_MONITOR) &&
(conf->flags & IEEE80211_CONF_IDLE) &&
!priv->listening) {
cw1200_disable_listening(priv);
priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
}
wsm_set_operational_mode(priv, &mode);
wsm_unlock_tx(priv);
}
if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS) {
pr_debug("[STA] Retry limits: %d (long), %d (short).\n",
conf->long_frame_max_tx_count,
conf->short_frame_max_tx_count);
spin_lock_bh(&priv->tx_policy_cache.lock);
priv->long_frame_max_tx_count = conf->long_frame_max_tx_count;
priv->short_frame_max_tx_count =
(conf->short_frame_max_tx_count < 0x0F) ?
conf->short_frame_max_tx_count : 0x0F;
priv->hw->max_rate_tries = priv->short_frame_max_tx_count;
spin_unlock_bh(&priv->tx_policy_cache.lock);
}
mutex_unlock(&priv->conf_mutex);
up(&priv->scan.lock);
return ret;
}
void cw1200_update_filtering(struct cw1200_common *priv)
{
int ret;
bool bssid_filtering = !priv->rx_filter.bssid;
bool is_p2p = priv->vif && priv->vif->p2p;
bool is_sta = priv->vif && NL80211_IFTYPE_STATION == priv->vif->type;
static struct wsm_beacon_filter_control bf_ctrl;
static struct wsm_mib_beacon_filter_table bf_tbl = {
.entry[0].ie_id = WLAN_EID_VENDOR_SPECIFIC,
.entry[0].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
WSM_BEACON_FILTER_IE_HAS_APPEARED,
.entry[0].oui[0] = 0x50,
.entry[0].oui[1] = 0x6F,
.entry[0].oui[2] = 0x9A,
.entry[1].ie_id = WLAN_EID_HT_OPERATION,
.entry[1].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
WSM_BEACON_FILTER_IE_HAS_APPEARED,
.entry[2].ie_id = WLAN_EID_ERP_INFO,
.entry[2].flags = WSM_BEACON_FILTER_IE_HAS_CHANGED |
WSM_BEACON_FILTER_IE_NO_LONGER_PRESENT |
WSM_BEACON_FILTER_IE_HAS_APPEARED,
};
if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE)
return;
else if (priv->join_status == CW1200_JOIN_STATUS_MONITOR)
bssid_filtering = false;
if (priv->disable_beacon_filter) {
bf_ctrl.enabled = 0;
bf_ctrl.bcn_count = 1;
bf_tbl.num = __cpu_to_le32(0);
} else if (is_p2p || !is_sta) {
bf_ctrl.enabled = WSM_BEACON_FILTER_ENABLE |
WSM_BEACON_FILTER_AUTO_ERP;
bf_ctrl.bcn_count = 0;
bf_tbl.num = __cpu_to_le32(2);
} else {
bf_ctrl.enabled = WSM_BEACON_FILTER_ENABLE;
bf_ctrl.bcn_count = 0;
bf_tbl.num = __cpu_to_le32(3);
}
/* When acting as p2p client being connected to p2p GO, in order to
* receive frames from a different p2p device, turn off bssid filter.
*
* WARNING: FW dependency!
* This can only be used with FW WSM371 and its successors.
* In that FW version even with bssid filter turned off,
* device will block most of the unwanted frames.
*/
if (is_p2p)
bssid_filtering = false;
ret = wsm_set_rx_filter(priv, &priv->rx_filter);
if (!ret)
ret = wsm_set_beacon_filter_table(priv, &bf_tbl);
if (!ret)
ret = wsm_beacon_filter_control(priv, &bf_ctrl);
if (!ret)
ret = wsm_set_bssid_filtering(priv, bssid_filtering);
if (!ret)
ret = wsm_set_multicast_filter(priv, &priv->multicast_filter);
if (ret)
wiphy_err(priv->hw->wiphy,
"Update filtering failed: %d.\n", ret);
return;
}
void cw1200_update_filtering_work(struct work_struct *work)
{
struct cw1200_common *priv =
container_of(work, struct cw1200_common,
update_filtering_work);
cw1200_update_filtering(priv);
}
void cw1200_set_beacon_wakeup_period_work(struct work_struct *work)
{
struct cw1200_common *priv =
container_of(work, struct cw1200_common,
set_beacon_wakeup_period_work);
wsm_set_beacon_wakeup_period(priv,
priv->beacon_int * priv->join_dtim_period >
MAX_BEACON_SKIP_TIME_MS ? 1 :
priv->join_dtim_period, 0);
}
u64 cw1200_prepare_multicast(struct ieee80211_hw *hw,
struct netdev_hw_addr_list *mc_list)
{
static u8 broadcast_ipv6[ETH_ALEN] = {
0x33, 0x33, 0x00, 0x00, 0x00, 0x01
};
static u8 broadcast_ipv4[ETH_ALEN] = {
0x01, 0x00, 0x5e, 0x00, 0x00, 0x01
};
struct cw1200_common *priv = hw->priv;
struct netdev_hw_addr *ha;
int count = 0;
/* Disable multicast filtering */
priv->has_multicast_subscription = false;
memset(&priv->multicast_filter, 0x00, sizeof(priv->multicast_filter));
if (netdev_hw_addr_list_count(mc_list) > WSM_MAX_GRP_ADDRTABLE_ENTRIES)
return 0;
/* Enable if requested */
netdev_hw_addr_list_for_each(ha, mc_list) {
pr_debug("[STA] multicast: %pM\n", ha->addr);
memcpy(&priv->multicast_filter.macaddrs[count],
ha->addr, ETH_ALEN);
if (!ether_addr_equal(ha->addr, broadcast_ipv4) &&
!ether_addr_equal(ha->addr, broadcast_ipv6))
priv->has_multicast_subscription = true;
count++;
}
if (count) {
priv->multicast_filter.enable = __cpu_to_le32(1);
priv->multicast_filter.num_addrs = __cpu_to_le32(count);
}
return netdev_hw_addr_list_count(mc_list);
}
void cw1200_configure_filter(struct ieee80211_hw *dev,
unsigned int changed_flags,
unsigned int *total_flags,
u64 multicast)
{
struct cw1200_common *priv = dev->priv;
bool listening = !!(*total_flags &
(FIF_PROMISC_IN_BSS |
FIF_OTHER_BSS |
FIF_BCN_PRBRESP_PROMISC |
FIF_PROBE_REQ));
*total_flags &= FIF_PROMISC_IN_BSS |
FIF_OTHER_BSS |
FIF_FCSFAIL |
FIF_BCN_PRBRESP_PROMISC |
FIF_PROBE_REQ;
down(&priv->scan.lock);
mutex_lock(&priv->conf_mutex);
priv->rx_filter.promiscuous = (*total_flags & FIF_PROMISC_IN_BSS)
? 1 : 0;
priv->rx_filter.bssid = (*total_flags & (FIF_OTHER_BSS |
FIF_PROBE_REQ)) ? 1 : 0;
priv->rx_filter.fcs = (*total_flags & FIF_FCSFAIL) ? 1 : 0;
priv->disable_beacon_filter = !(*total_flags &
(FIF_BCN_PRBRESP_PROMISC |
FIF_PROMISC_IN_BSS |
FIF_PROBE_REQ));
if (priv->listening != listening) {
priv->listening = listening;
wsm_lock_tx(priv);
cw1200_update_listening(priv, listening);
wsm_unlock_tx(priv);
}
cw1200_update_filtering(priv);
mutex_unlock(&priv->conf_mutex);
up(&priv->scan.lock);
}
int cw1200_conf_tx(struct ieee80211_hw *dev, struct ieee80211_vif *vif,
u16 queue, const struct ieee80211_tx_queue_params *params)
{
struct cw1200_common *priv = dev->priv;
int ret = 0;
/* To prevent re-applying PM request OID again and again*/
bool old_uapsd_flags;
mutex_lock(&priv->conf_mutex);
if (queue < dev->queues) {
old_uapsd_flags = le16_to_cpu(priv->uapsd_info.uapsd_flags);
WSM_TX_QUEUE_SET(&priv->tx_queue_params, queue, 0, 0, 0);
ret = wsm_set_tx_queue_params(priv,
&priv->tx_queue_params.params[queue], queue);
if (ret) {
ret = -EINVAL;
goto out;
}
WSM_EDCA_SET(&priv->edca, queue, params->aifs,
params->cw_min, params->cw_max,
params->txop, 0xc8,
params->uapsd);
ret = wsm_set_edca_params(priv, &priv->edca);
if (ret) {
ret = -EINVAL;
goto out;
}
if (priv->mode == NL80211_IFTYPE_STATION) {
ret = cw1200_set_uapsd_param(priv, &priv->edca);
if (!ret && priv->setbssparams_done &&
(priv->join_status == CW1200_JOIN_STATUS_STA) &&
(old_uapsd_flags != le16_to_cpu(priv->uapsd_info.uapsd_flags)))
ret = cw1200_set_pm(priv, &priv->powersave_mode);
}
} else {
ret = -EINVAL;
}
out:
mutex_unlock(&priv->conf_mutex);
return ret;
}
int cw1200_get_stats(struct ieee80211_hw *dev,
struct ieee80211_low_level_stats *stats)
{
struct cw1200_common *priv = dev->priv;
memcpy(stats, &priv->stats, sizeof(*stats));
return 0;
}
int cw1200_set_pm(struct cw1200_common *priv, const struct wsm_set_pm *arg)
{
struct wsm_set_pm pm = *arg;
if (priv->uapsd_info.uapsd_flags != 0)
pm.mode &= ~WSM_PSM_FAST_PS_FLAG;
if (memcmp(&pm, &priv->firmware_ps_mode,
sizeof(struct wsm_set_pm))) {
priv->firmware_ps_mode = pm;
return wsm_set_pm(priv, &pm);
} else {
return 0;
}
}
int cw1200_set_key(struct ieee80211_hw *dev, enum set_key_cmd cmd,
struct ieee80211_vif *vif, struct ieee80211_sta *sta,
struct ieee80211_key_conf *key)
{
int ret = -EOPNOTSUPP;
struct cw1200_common *priv = dev->priv;
struct ieee80211_key_seq seq;
mutex_lock(&priv->conf_mutex);
if (cmd == SET_KEY) {
u8 *peer_addr = NULL;
int pairwise = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE) ?
1 : 0;
int idx = cw1200_alloc_key(priv);
struct wsm_add_key *wsm_key = &priv->keys[idx];
if (idx < 0) {
ret = -EINVAL;
goto finally;
}
if (sta)
peer_addr = sta->addr;
key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
switch (key->cipher) {
case WLAN_CIPHER_SUITE_WEP40:
case WLAN_CIPHER_SUITE_WEP104:
if (key->keylen > 16) {
cw1200_free_key(priv, idx);
ret = -EINVAL;
goto finally;
}
if (pairwise) {
wsm_key->type = WSM_KEY_TYPE_WEP_PAIRWISE;
memcpy(wsm_key->wep_pairwise.peer,
peer_addr, ETH_ALEN);
memcpy(wsm_key->wep_pairwise.keydata,
&key->key[0], key->keylen);
wsm_key->wep_pairwise.keylen = key->keylen;
} else {
wsm_key->type = WSM_KEY_TYPE_WEP_DEFAULT;
memcpy(wsm_key->wep_group.keydata,
&key->key[0], key->keylen);
wsm_key->wep_group.keylen = key->keylen;
wsm_key->wep_group.keyid = key->keyidx;
}
break;
case WLAN_CIPHER_SUITE_TKIP:
ieee80211_get_key_rx_seq(key, 0, &seq);
if (pairwise) {
wsm_key->type = WSM_KEY_TYPE_TKIP_PAIRWISE;
memcpy(wsm_key->tkip_pairwise.peer,
peer_addr, ETH_ALEN);
memcpy(wsm_key->tkip_pairwise.keydata,
&key->key[0], 16);
memcpy(wsm_key->tkip_pairwise.tx_mic_key,
&key->key[16], 8);
memcpy(wsm_key->tkip_pairwise.rx_mic_key,
&key->key[24], 8);
} else {
size_t mic_offset =
(priv->mode == NL80211_IFTYPE_AP) ?
16 : 24;
wsm_key->type = WSM_KEY_TYPE_TKIP_GROUP;
memcpy(wsm_key->tkip_group.keydata,
&key->key[0], 16);
memcpy(wsm_key->tkip_group.rx_mic_key,
&key->key[mic_offset], 8);
wsm_key->tkip_group.rx_seqnum[0] = seq.tkip.iv16 & 0xff;
wsm_key->tkip_group.rx_seqnum[1] = (seq.tkip.iv16 >> 8) & 0xff;
wsm_key->tkip_group.rx_seqnum[2] = seq.tkip.iv32 & 0xff;
wsm_key->tkip_group.rx_seqnum[3] = (seq.tkip.iv32 >> 8) & 0xff;
wsm_key->tkip_group.rx_seqnum[4] = (seq.tkip.iv32 >> 16) & 0xff;
wsm_key->tkip_group.rx_seqnum[5] = (seq.tkip.iv32 >> 24) & 0xff;
wsm_key->tkip_group.rx_seqnum[6] = 0;
wsm_key->tkip_group.rx_seqnum[7] = 0;
wsm_key->tkip_group.keyid = key->keyidx;
}
break;
case WLAN_CIPHER_SUITE_CCMP:
ieee80211_get_key_rx_seq(key, 0, &seq);
if (pairwise) {
wsm_key->type = WSM_KEY_TYPE_AES_PAIRWISE;
memcpy(wsm_key->aes_pairwise.peer,
peer_addr, ETH_ALEN);
memcpy(wsm_key->aes_pairwise.keydata,
&key->key[0], 16);
} else {
wsm_key->type = WSM_KEY_TYPE_AES_GROUP;
memcpy(wsm_key->aes_group.keydata,
&key->key[0], 16);
wsm_key->aes_group.rx_seqnum[0] = seq.ccmp.pn[5];
wsm_key->aes_group.rx_seqnum[1] = seq.ccmp.pn[4];
wsm_key->aes_group.rx_seqnum[2] = seq.ccmp.pn[3];
wsm_key->aes_group.rx_seqnum[3] = seq.ccmp.pn[2];
wsm_key->aes_group.rx_seqnum[4] = seq.ccmp.pn[1];
wsm_key->aes_group.rx_seqnum[5] = seq.ccmp.pn[0];
wsm_key->aes_group.rx_seqnum[6] = 0;
wsm_key->aes_group.rx_seqnum[7] = 0;
wsm_key->aes_group.keyid = key->keyidx;
}
break;
case WLAN_CIPHER_SUITE_SMS4:
if (pairwise) {
wsm_key->type = WSM_KEY_TYPE_WAPI_PAIRWISE;
memcpy(wsm_key->wapi_pairwise.peer,
peer_addr, ETH_ALEN);
memcpy(wsm_key->wapi_pairwise.keydata,
&key->key[0], 16);
memcpy(wsm_key->wapi_pairwise.mic_key,
&key->key[16], 16);
wsm_key->wapi_pairwise.keyid = key->keyidx;
} else {
wsm_key->type = WSM_KEY_TYPE_WAPI_GROUP;
memcpy(wsm_key->wapi_group.keydata,
&key->key[0], 16);
memcpy(wsm_key->wapi_group.mic_key,
&key->key[16], 16);
wsm_key->wapi_group.keyid = key->keyidx;
}
break;
default:
pr_warn("Unhandled key type %d\n", key->cipher);
cw1200_free_key(priv, idx);
ret = -EOPNOTSUPP;
goto finally;
}
ret = wsm_add_key(priv, wsm_key);
if (!ret)
key->hw_key_idx = idx;
else
cw1200_free_key(priv, idx);
} else if (cmd == DISABLE_KEY) {
struct wsm_remove_key wsm_key = {
.index = key->hw_key_idx,
};
if (wsm_key.index > WSM_KEY_MAX_INDEX) {
ret = -EINVAL;
goto finally;
}
cw1200_free_key(priv, wsm_key.index);
ret = wsm_remove_key(priv, &wsm_key);
} else {
pr_warn("Unhandled key command %d\n", cmd);
}
finally:
mutex_unlock(&priv->conf_mutex);
return ret;
}
void cw1200_wep_key_work(struct work_struct *work)
{
struct cw1200_common *priv =
container_of(work, struct cw1200_common, wep_key_work);
u8 queue_id = cw1200_queue_get_queue_id(priv->pending_frame_id);
struct cw1200_queue *queue = &priv->tx_queue[queue_id];
__le32 wep_default_key_id = __cpu_to_le32(
priv->wep_default_key_id);
pr_debug("[STA] Setting default WEP key: %d\n",
priv->wep_default_key_id);
wsm_flush_tx(priv);
wsm_write_mib(priv, WSM_MIB_ID_DOT11_WEP_DEFAULT_KEY_ID,
&wep_default_key_id, sizeof(wep_default_key_id));
cw1200_queue_requeue(queue, priv->pending_frame_id);
wsm_unlock_tx(priv);
}
int cw1200_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
{
int ret = 0;
__le32 val32;
struct cw1200_common *priv = hw->priv;
if (priv->mode == NL80211_IFTYPE_UNSPECIFIED)
return 0;
if (value != (u32) -1)
val32 = __cpu_to_le32(value);
else
val32 = 0; /* disabled */
if (priv->mode == NL80211_IFTYPE_UNSPECIFIED) {
/* device is down, can _not_ set threshold */
ret = -ENODEV;
goto out;
}
if (priv->rts_threshold == value)
goto out;
pr_debug("[STA] Setting RTS threshold: %d\n",
priv->rts_threshold);
/* mutex_lock(&priv->conf_mutex); */
ret = wsm_write_mib(priv, WSM_MIB_ID_DOT11_RTS_THRESHOLD,
&val32, sizeof(val32));
if (!ret)
priv->rts_threshold = value;
/* mutex_unlock(&priv->conf_mutex); */
out:
return ret;
}
/* If successful, LOCKS the TX queue! */
static int __cw1200_flush(struct cw1200_common *priv, bool drop)
{
int i, ret;
for (;;) {
/* TODO: correct flush handling is required when dev_stop.
* Temporary workaround: 2s
*/
if (drop) {
for (i = 0; i < 4; ++i)
cw1200_queue_clear(&priv->tx_queue[i]);
} else {
ret = wait_event_timeout(
priv->tx_queue_stats.wait_link_id_empty,
cw1200_queue_stats_is_empty(
&priv->tx_queue_stats, -1),
2 * HZ);
}
if (!drop && ret <= 0) {
ret = -ETIMEDOUT;
break;
} else {
ret = 0;
}
wsm_lock_tx(priv);
if (!cw1200_queue_stats_is_empty(&priv->tx_queue_stats, -1)) {
/* Highly unlikely: WSM requeued frames. */
wsm_unlock_tx(priv);
continue;
}
break;
}
return ret;
}
void cw1200_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
u32 queues, bool drop)
{
struct cw1200_common *priv = hw->priv;
switch (priv->mode) {
case NL80211_IFTYPE_MONITOR:
drop = true;
break;
case NL80211_IFTYPE_AP:
if (!priv->enable_beacon)
drop = true;
break;
}
if (!__cw1200_flush(priv, drop))
wsm_unlock_tx(priv);
return;
}
/* ******************************************************************** */
/* WSM callbacks */
void cw1200_free_event_queue(struct cw1200_common *priv)
{
LIST_HEAD(list);
spin_lock(&priv->event_queue_lock);
list_splice_init(&priv->event_queue, &list);
spin_unlock(&priv->event_queue_lock);
__cw1200_free_event_queue(&list);
}
void cw1200_event_handler(struct work_struct *work)
{
struct cw1200_common *priv =
container_of(work, struct cw1200_common, event_handler);
struct cw1200_wsm_event *event;
LIST_HEAD(list);
spin_lock(&priv->event_queue_lock);
list_splice_init(&priv->event_queue, &list);
spin_unlock(&priv->event_queue_lock);
list_for_each_entry(event, &list, link) {
switch (event->evt.id) {
case WSM_EVENT_ERROR:
pr_err("Unhandled WSM Error from LMAC\n");
break;
case WSM_EVENT_BSS_LOST:
pr_debug("[CQM] BSS lost.\n");
cancel_work_sync(&priv->unjoin_work);
if (!down_trylock(&priv->scan.lock)) {
cw1200_cqm_bssloss_sm(priv, 1, 0, 0);
up(&priv->scan.lock);
} else {
/* Scan is in progress. Delay reporting.
* Scan complete will trigger bss_loss_work
*/
priv->delayed_link_loss = 1;
/* Also start a watchdog. */
queue_delayed_work(priv->workqueue,
&priv->bss_loss_work, 5*HZ);
}
break;
case WSM_EVENT_BSS_REGAINED:
pr_debug("[CQM] BSS regained.\n");
cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
cancel_work_sync(&priv->unjoin_work);
break;
case WSM_EVENT_RADAR_DETECTED:
wiphy_info(priv->hw->wiphy, "radar pulse detected\n");
break;
case WSM_EVENT_RCPI_RSSI:
{
/* RSSI: signed Q8.0, RCPI: unsigned Q7.1
* RSSI = RCPI / 2 - 110
*/
int rcpi_rssi = (int)(event->evt.data & 0xFF);
int cqm_evt;
if (priv->cqm_use_rssi)
rcpi_rssi = (s8)rcpi_rssi;
else
rcpi_rssi = rcpi_rssi / 2 - 110;
cqm_evt = (rcpi_rssi <= priv->cqm_rssi_thold) ?
NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW :
NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
pr_debug("[CQM] RSSI event: %d.\n", rcpi_rssi);
ieee80211_cqm_rssi_notify(priv->vif, cqm_evt,
GFP_KERNEL);
break;
}
case WSM_EVENT_BT_INACTIVE:
pr_warn("Unhandled BT INACTIVE from LMAC\n");
break;
case WSM_EVENT_BT_ACTIVE:
pr_warn("Unhandled BT ACTIVE from LMAC\n");
break;
}
}
__cw1200_free_event_queue(&list);
}
void cw1200_bss_loss_work(struct work_struct *work)
{
struct cw1200_common *priv =
container_of(work, struct cw1200_common, bss_loss_work.work);
pr_debug("[CQM] Reporting connection loss.\n");
wsm_lock_tx(priv);
if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
wsm_unlock_tx(priv);
}
void cw1200_bss_params_work(struct work_struct *work)
{
struct cw1200_common *priv =
container_of(work, struct cw1200_common, bss_params_work);
mutex_lock(&priv->conf_mutex);
priv->bss_params.reset_beacon_loss = 1;
wsm_set_bss_params(priv, &priv->bss_params);
priv->bss_params.reset_beacon_loss = 0;
mutex_unlock(&priv->conf_mutex);
}
/* ******************************************************************** */
/* Internal API */
/* This function is called to Parse the SDD file
* to extract listen_interval and PTA related information
* sdd is a TLV: u8 id, u8 len, u8 data[]
*/
static int cw1200_parse_sdd_file(struct cw1200_common *priv)
{
const u8 *p = priv->sdd->data;
int ret = 0;
while (p + 2 <= priv->sdd->data + priv->sdd->size) {
if (p + p[1] + 2 > priv->sdd->data + priv->sdd->size) {
pr_warn("Malformed sdd structure\n");
return -1;
}
switch (p[0]) {
case SDD_PTA_CFG_ELT_ID: {
u16 v;
if (p[1] < 4) {
pr_warn("SDD_PTA_CFG_ELT_ID malformed\n");
ret = -1;
break;
}
v = le16_to_cpu(*((__le16 *)(p + 2)));
if (!v) /* non-zero means this is enabled */
break;
v = le16_to_cpu(*((__le16 *)(p + 4)));
priv->conf_listen_interval = (v >> 7) & 0x1F;
pr_debug("PTA found; Listen Interval %d\n",
priv->conf_listen_interval);
break;
}
case SDD_REFERENCE_FREQUENCY_ELT_ID: {
u16 clk = le16_to_cpu(*((__le16 *)(p + 2)));
if (clk != priv->hw_refclk)
pr_warn("SDD file doesn't match configured refclk (%d vs %d)\n",
clk, priv->hw_refclk);
break;
}
default:
break;
}
p += p[1] + 2;
}
if (!priv->bt_present) {
pr_debug("PTA element NOT found.\n");
priv->conf_listen_interval = 0;
}
return ret;
}
int cw1200_setup_mac(struct cw1200_common *priv)
{
int ret = 0;
/* NOTE: There is a bug in FW: it reports signal
* as RSSI if RSSI subscription is enabled.
* It's not enough to set WSM_RCPI_RSSI_USE_RSSI.
*
* NOTE2: RSSI based reports have been switched to RCPI, since
* FW has a bug and RSSI reported values are not stable,
* what can leads to signal level oscilations in user-end applications
*/
struct wsm_rcpi_rssi_threshold threshold = {
.rssiRcpiMode = WSM_RCPI_RSSI_THRESHOLD_ENABLE |
WSM_RCPI_RSSI_DONT_USE_UPPER |
WSM_RCPI_RSSI_DONT_USE_LOWER,
.rollingAverageCount = 16,
};
struct wsm_configuration cfg = {
.dot11StationId = &priv->mac_addr[0],
};
/* Remember the decission here to make sure, we will handle
* the RCPI/RSSI value correctly on WSM_EVENT_RCPI_RSS
*/
if (threshold.rssiRcpiMode & WSM_RCPI_RSSI_USE_RSSI)
priv->cqm_use_rssi = true;
if (!priv->sdd) {
ret = request_firmware(&priv->sdd, priv->sdd_path, priv->pdev);
if (ret) {
pr_err("Can't load sdd file %s.\n", priv->sdd_path);
return ret;
}
cw1200_parse_sdd_file(priv);
}
cfg.dpdData = priv->sdd->data;
cfg.dpdData_size = priv->sdd->size;
ret = wsm_configuration(priv, &cfg);
if (ret)
return ret;
/* Configure RSSI/SCPI reporting as RSSI. */
wsm_set_rcpi_rssi_threshold(priv, &threshold);
return 0;
}
static void cw1200_join_complete(struct cw1200_common *priv)
{
pr_debug("[STA] Join complete (%d)\n", priv->join_complete_status);
priv->join_pending = false;
if (priv->join_complete_status) {
priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
cw1200_update_listening(priv, priv->listening);
cw1200_do_unjoin(priv);
ieee80211_connection_loss(priv->vif);
} else {
if (priv->mode == NL80211_IFTYPE_ADHOC)
priv->join_status = CW1200_JOIN_STATUS_IBSS;
else
priv->join_status = CW1200_JOIN_STATUS_PRE_STA;
}
wsm_unlock_tx(priv); /* Clearing the lock held before do_join() */
}
void cw1200_join_complete_work(struct work_struct *work)
{
struct cw1200_common *priv =
container_of(work, struct cw1200_common, join_complete_work);
mutex_lock(&priv->conf_mutex);
cw1200_join_complete(priv);
mutex_unlock(&priv->conf_mutex);
}
void cw1200_join_complete_cb(struct cw1200_common *priv,
struct wsm_join_complete *arg)
{
pr_debug("[STA] cw1200_join_complete_cb called, status=%d.\n",
arg->status);
if (cancel_delayed_work(&priv->join_timeout)) {
priv->join_complete_status = arg->status;
queue_work(priv->workqueue, &priv->join_complete_work);
}
}
/* MUST be called with tx_lock held! It will be unlocked for us. */
static void cw1200_do_join(struct cw1200_common *priv)
{
const u8 *bssid;
struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
struct cfg80211_bss *bss = NULL;
struct wsm_protected_mgmt_policy mgmt_policy;
struct wsm_join join = {
.mode = conf->ibss_joined ?
WSM_JOIN_MODE_IBSS : WSM_JOIN_MODE_BSS,
.preamble_type = WSM_JOIN_PREAMBLE_LONG,
.probe_for_join = 1,
.atim_window = 0,
.basic_rate_set = cw1200_rate_mask_to_wsm(priv,
conf->basic_rates),
};
if (delayed_work_pending(&priv->join_timeout)) {
pr_warn("[STA] - Join request already pending, skipping..\n");
wsm_unlock_tx(priv);
return;
}
if (priv->join_status)
cw1200_do_unjoin(priv);
bssid = priv->vif->bss_conf.bssid;
bss = cfg80211_get_bss(priv->hw->wiphy, priv->channel,
bssid, NULL, 0, 0, 0);
if (!bss && !conf->ibss_joined) {
wsm_unlock_tx(priv);
return;
}
mutex_lock(&priv->conf_mutex);
/* Under the conf lock: check scan status and
* bail out if it is in progress.
*/
if (atomic_read(&priv->scan.in_progress)) {
wsm_unlock_tx(priv);
goto done_put;
}
priv->join_pending = true;
/* Sanity check basic rates */
if (!join.basic_rate_set)
join.basic_rate_set = 7;
/* Sanity check beacon interval */
if (!priv->beacon_int)
priv->beacon_int = 1;
join.beacon_interval = priv->beacon_int;
/* BT Coex related changes */
if (priv->bt_present) {
if (((priv->conf_listen_interval * 100) %
priv->beacon_int) == 0)
priv->listen_interval =
((priv->conf_listen_interval * 100) /
priv->beacon_int);
else
priv->listen_interval =
((priv->conf_listen_interval * 100) /
priv->beacon_int + 1);
}
if (priv->hw->conf.ps_dtim_period)
priv->join_dtim_period = priv->hw->conf.ps_dtim_period;
join.dtim_period = priv->join_dtim_period;
join.channel_number = priv->channel->hw_value;
join.band = (priv->channel->band == IEEE80211_BAND_5GHZ) ?
WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G;
memcpy(join.bssid, bssid, sizeof(join.bssid));
pr_debug("[STA] Join BSSID: %pM DTIM: %d, interval: %d\n",
join.bssid,
join.dtim_period, priv->beacon_int);
if (!conf->ibss_joined) {
const u8 *ssidie;
rcu_read_lock();
ssidie = ieee80211_bss_get_ie(bss, WLAN_EID_SSID);
if (ssidie) {
join.ssid_len = ssidie[1];
memcpy(join.ssid, &ssidie[2], join.ssid_len);
}
rcu_read_unlock();
}
if (priv->vif->p2p) {
join.flags |= WSM_JOIN_FLAGS_P2P_GO;
join.basic_rate_set =
cw1200_rate_mask_to_wsm(priv, 0xFF0);
}
/* Enable asynchronous join calls */
if (!conf->ibss_joined) {
join.flags |= WSM_JOIN_FLAGS_FORCE;
join.flags |= WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND;
}
wsm_flush_tx(priv);
/* Stay Awake for Join and Auth Timeouts and a bit more */
cw1200_pm_stay_awake(&priv->pm_state,
CW1200_JOIN_TIMEOUT + CW1200_AUTH_TIMEOUT);
cw1200_update_listening(priv, false);
/* Turn on Block ACKs */
wsm_set_block_ack_policy(priv, priv->ba_tx_tid_mask,
priv->ba_rx_tid_mask);
/* Set up timeout */
if (join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND) {
priv->join_status = CW1200_JOIN_STATUS_JOINING;
queue_delayed_work(priv->workqueue,
&priv->join_timeout,
CW1200_JOIN_TIMEOUT);
}
/* 802.11w protected mgmt frames */
mgmt_policy.protectedMgmtEnable = 0;
mgmt_policy.unprotectedMgmtFramesAllowed = 1;
mgmt_policy.encryptionForAuthFrame = 1;
wsm_set_protected_mgmt_policy(priv, &mgmt_policy);
/* Perform actual join */
if (wsm_join(priv, &join)) {
pr_err("[STA] cw1200_join_work: wsm_join failed!\n");
cancel_delayed_work_sync(&priv->join_timeout);
cw1200_update_listening(priv, priv->listening);
/* Tx lock still held, unjoin will clear it. */
if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
wsm_unlock_tx(priv);
} else {
if (!(join.flags & WSM_JOIN_FLAGS_FORCE_WITH_COMPLETE_IND))
cw1200_join_complete(priv); /* Will clear tx_lock */
/* Upload keys */
cw1200_upload_keys(priv);
/* Due to beacon filtering it is possible that the
* AP's beacon is not known for the mac80211 stack.
* Disable filtering temporary to make sure the stack
* receives at least one
*/
priv->disable_beacon_filter = true;
}
cw1200_update_filtering(priv);
done_put:
mutex_unlock(&priv->conf_mutex);
if (bss)
cfg80211_put_bss(priv->hw->wiphy, bss);
}
void cw1200_join_timeout(struct work_struct *work)
{
struct cw1200_common *priv =
container_of(work, struct cw1200_common, join_timeout.work);
pr_debug("[WSM] Join timed out.\n");
wsm_lock_tx(priv);
if (queue_work(priv->workqueue, &priv->unjoin_work) <= 0)
wsm_unlock_tx(priv);
}
static void cw1200_do_unjoin(struct cw1200_common *priv)
{
struct wsm_reset reset = {
.reset_statistics = true,
};
cancel_delayed_work_sync(&priv->join_timeout);
mutex_lock(&priv->conf_mutex);
priv->join_pending = false;
if (atomic_read(&priv->scan.in_progress)) {
if (priv->delayed_unjoin)
wiphy_dbg(priv->hw->wiphy, "Delayed unjoin is already scheduled.\n");
else
priv->delayed_unjoin = true;
goto done;
}
priv->delayed_link_loss = false;
if (!priv->join_status)
goto done;
if (priv->join_status == CW1200_JOIN_STATUS_AP)
goto done;
cancel_work_sync(&priv->update_filtering_work);
cancel_work_sync(&priv->set_beacon_wakeup_period_work);
priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
/* Unjoin is a reset. */
wsm_flush_tx(priv);
wsm_keep_alive_period(priv, 0);
wsm_reset(priv, &reset);
wsm_set_output_power(priv, priv->output_power * 10);
priv->join_dtim_period = 0;
cw1200_setup_mac(priv);
cw1200_free_event_queue(priv);
cancel_work_sync(&priv->event_handler);
cw1200_update_listening(priv, priv->listening);
cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
/* Disable Block ACKs */
wsm_set_block_ack_policy(priv, 0, 0);
priv->disable_beacon_filter = false;
cw1200_update_filtering(priv);
memset(&priv->association_mode, 0,
sizeof(priv->association_mode));
memset(&priv->bss_params, 0, sizeof(priv->bss_params));
priv->setbssparams_done = false;
memset(&priv->firmware_ps_mode, 0,
sizeof(priv->firmware_ps_mode));
pr_debug("[STA] Unjoin completed.\n");
done:
mutex_unlock(&priv->conf_mutex);
}
void cw1200_unjoin_work(struct work_struct *work)
{
struct cw1200_common *priv =
container_of(work, struct cw1200_common, unjoin_work);
cw1200_do_unjoin(priv);
/* Tell the stack we're dead */
ieee80211_connection_loss(priv->vif);
wsm_unlock_tx(priv);
}
int cw1200_enable_listening(struct cw1200_common *priv)
{
struct wsm_start start = {
.mode = WSM_START_MODE_P2P_DEV,
.band = WSM_PHY_BAND_2_4G,
.beacon_interval = 100,
.dtim_period = 1,
.probe_delay = 0,
.basic_rate_set = 0x0F,
};
if (priv->channel) {
start.band = priv->channel->band == IEEE80211_BAND_5GHZ ?
WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G;
start.channel_number = priv->channel->hw_value;
} else {
start.band = WSM_PHY_BAND_2_4G;
start.channel_number = 1;
}
return wsm_start(priv, &start);
}
int cw1200_disable_listening(struct cw1200_common *priv)
{
int ret;
struct wsm_reset reset = {
.reset_statistics = true,
};
ret = wsm_reset(priv, &reset);
return ret;
}
void cw1200_update_listening(struct cw1200_common *priv, bool enabled)
{
if (enabled) {
if (priv->join_status == CW1200_JOIN_STATUS_PASSIVE) {
if (!cw1200_enable_listening(priv))
priv->join_status = CW1200_JOIN_STATUS_MONITOR;
wsm_set_probe_responder(priv, true);
}
} else {
if (priv->join_status == CW1200_JOIN_STATUS_MONITOR) {
if (!cw1200_disable_listening(priv))
priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
wsm_set_probe_responder(priv, false);
}
}
}
int cw1200_set_uapsd_param(struct cw1200_common *priv,
const struct wsm_edca_params *arg)
{
int ret;
u16 uapsd_flags = 0;
/* Here's the mapping AC [queue, bit]
* VO [0,3], VI [1, 2], BE [2, 1], BK [3, 0]
*/
if (arg->uapsd_enable[0])
uapsd_flags |= 1 << 3;
if (arg->uapsd_enable[1])
uapsd_flags |= 1 << 2;
if (arg->uapsd_enable[2])
uapsd_flags |= 1 << 1;
if (arg->uapsd_enable[3])
uapsd_flags |= 1;
/* Currently pseudo U-APSD operation is not supported, so setting
* MinAutoTriggerInterval, MaxAutoTriggerInterval and
* AutoTriggerStep to 0
*/
priv->uapsd_info.uapsd_flags = cpu_to_le16(uapsd_flags);
priv->uapsd_info.min_auto_trigger_interval = 0;
priv->uapsd_info.max_auto_trigger_interval = 0;
priv->uapsd_info.auto_trigger_step = 0;
ret = wsm_set_uapsd_info(priv, &priv->uapsd_info);
return ret;
}
/* ******************************************************************** */
/* AP API */
int cw1200_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
struct ieee80211_sta *sta)
{
struct cw1200_common *priv = hw->priv;
struct cw1200_sta_priv *sta_priv =
(struct cw1200_sta_priv *)&sta->drv_priv;
struct cw1200_link_entry *entry;
struct sk_buff *skb;
if (priv->mode != NL80211_IFTYPE_AP)
return 0;
sta_priv->link_id = cw1200_find_link_id(priv, sta->addr);
if (WARN_ON(!sta_priv->link_id)) {
wiphy_info(priv->hw->wiphy,
"[AP] No more link IDs available.\n");
return -ENOENT;
}
entry = &priv->link_id_db[sta_priv->link_id - 1];
spin_lock_bh(&priv->ps_state_lock);
if ((sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK) ==
IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
priv->sta_asleep_mask |= BIT(sta_priv->link_id);
entry->status = CW1200_LINK_HARD;
while ((skb = skb_dequeue(&entry->rx_queue)))
ieee80211_rx_irqsafe(priv->hw, skb);
spin_unlock_bh(&priv->ps_state_lock);
return 0;
}
int cw1200_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
struct ieee80211_sta *sta)
{
struct cw1200_common *priv = hw->priv;
struct cw1200_sta_priv *sta_priv =
(struct cw1200_sta_priv *)&sta->drv_priv;
struct cw1200_link_entry *entry;
if (priv->mode != NL80211_IFTYPE_AP || !sta_priv->link_id)
return 0;
entry = &priv->link_id_db[sta_priv->link_id - 1];
spin_lock_bh(&priv->ps_state_lock);
entry->status = CW1200_LINK_RESERVE;
entry->timestamp = jiffies;
wsm_lock_tx_async(priv);
if (queue_work(priv->workqueue, &priv->link_id_work) <= 0)
wsm_unlock_tx(priv);
spin_unlock_bh(&priv->ps_state_lock);
flush_workqueue(priv->workqueue);
return 0;
}
static void __cw1200_sta_notify(struct ieee80211_hw *dev,
struct ieee80211_vif *vif,
enum sta_notify_cmd notify_cmd,
int link_id)
{
struct cw1200_common *priv = dev->priv;
u32 bit, prev;
/* Zero link id means "for all link IDs" */
if (link_id)
bit = BIT(link_id);
else if (WARN_ON_ONCE(notify_cmd != STA_NOTIFY_AWAKE))
bit = 0;
else
bit = priv->link_id_map;
prev = priv->sta_asleep_mask & bit;
switch (notify_cmd) {
case STA_NOTIFY_SLEEP:
if (!prev) {
if (priv->buffered_multicasts &&
!priv->sta_asleep_mask)
queue_work(priv->workqueue,
&priv->multicast_start_work);
priv->sta_asleep_mask |= bit;
}
break;
case STA_NOTIFY_AWAKE:
if (prev) {
priv->sta_asleep_mask &= ~bit;
priv->pspoll_mask &= ~bit;
if (priv->tx_multicast && link_id &&
!priv->sta_asleep_mask)
queue_work(priv->workqueue,
&priv->multicast_stop_work);
cw1200_bh_wakeup(priv);
}
break;
}
}
void cw1200_sta_notify(struct ieee80211_hw *dev,
struct ieee80211_vif *vif,
enum sta_notify_cmd notify_cmd,
struct ieee80211_sta *sta)
{
struct cw1200_common *priv = dev->priv;
struct cw1200_sta_priv *sta_priv =
(struct cw1200_sta_priv *)&sta->drv_priv;
spin_lock_bh(&priv->ps_state_lock);
__cw1200_sta_notify(dev, vif, notify_cmd, sta_priv->link_id);
spin_unlock_bh(&priv->ps_state_lock);
}
static void cw1200_ps_notify(struct cw1200_common *priv,
int link_id, bool ps)
{
if (link_id > CW1200_MAX_STA_IN_AP_MODE)
return;
pr_debug("%s for LinkId: %d. STAs asleep: %.8X\n",
ps ? "Stop" : "Start",
link_id, priv->sta_asleep_mask);
__cw1200_sta_notify(priv->hw, priv->vif,
ps ? STA_NOTIFY_SLEEP : STA_NOTIFY_AWAKE, link_id);
}
static int cw1200_set_tim_impl(struct cw1200_common *priv, bool aid0_bit_set)
{
struct sk_buff *skb;
struct wsm_update_ie update_ie = {
.what = WSM_UPDATE_IE_BEACON,
.count = 1,
};
u16 tim_offset, tim_length;
pr_debug("[AP] mcast: %s.\n", aid0_bit_set ? "ena" : "dis");
skb = ieee80211_beacon_get_tim(priv->hw, priv->vif,
&tim_offset, &tim_length);
if (!skb) {
if (!__cw1200_flush(priv, true))
wsm_unlock_tx(priv);
return -ENOENT;
}
if (tim_offset && tim_length >= 6) {
/* Ignore DTIM count from mac80211:
* firmware handles DTIM internally.
*/
skb->data[tim_offset + 2] = 0;
/* Set/reset aid0 bit */
if (aid0_bit_set)
skb->data[tim_offset + 4] |= 1;
else
skb->data[tim_offset + 4] &= ~1;
}
update_ie.ies = &skb->data[tim_offset];
update_ie.length = tim_length;
wsm_update_ie(priv, &update_ie);
dev_kfree_skb(skb);
return 0;
}
void cw1200_set_tim_work(struct work_struct *work)
{
struct cw1200_common *priv =
container_of(work, struct cw1200_common, set_tim_work);
(void)cw1200_set_tim_impl(priv, priv->aid0_bit_set);
}
int cw1200_set_tim(struct ieee80211_hw *dev, struct ieee80211_sta *sta,
bool set)
{
struct cw1200_common *priv = dev->priv;
queue_work(priv->workqueue, &priv->set_tim_work);
return 0;
}
void cw1200_set_cts_work(struct work_struct *work)
{
struct cw1200_common *priv =
container_of(work, struct cw1200_common, set_cts_work);
u8 erp_ie[3] = {WLAN_EID_ERP_INFO, 0x1, 0};
struct wsm_update_ie update_ie = {
.what = WSM_UPDATE_IE_BEACON,
.count = 1,
.ies = erp_ie,
.length = 3,
};
u32 erp_info;
__le32 use_cts_prot;
mutex_lock(&priv->conf_mutex);
erp_info = priv->erp_info;
mutex_unlock(&priv->conf_mutex);
use_cts_prot =
erp_info & WLAN_ERP_USE_PROTECTION ?
__cpu_to_le32(1) : 0;
erp_ie[ERP_INFO_BYTE_OFFSET] = erp_info;
pr_debug("[STA] ERP information 0x%x\n", erp_info);
wsm_write_mib(priv, WSM_MIB_ID_NON_ERP_PROTECTION,
&use_cts_prot, sizeof(use_cts_prot));
wsm_update_ie(priv, &update_ie);
return;
}
static int cw1200_set_btcoexinfo(struct cw1200_common *priv)
{
struct wsm_override_internal_txrate arg;
int ret = 0;
if (priv->mode == NL80211_IFTYPE_STATION) {
/* Plumb PSPOLL and NULL template */
cw1200_upload_pspoll(priv);
cw1200_upload_null(priv);
cw1200_upload_qosnull(priv);
} else {
return 0;
}
memset(&arg, 0, sizeof(struct wsm_override_internal_txrate));
if (!priv->vif->p2p) {
/* STATION mode */
if (priv->bss_params.operational_rate_set & ~0xF) {
pr_debug("[STA] STA has ERP rates\n");
/* G or BG mode */
arg.internalTxRate = (__ffs(
priv->bss_params.operational_rate_set & ~0xF));
} else {
pr_debug("[STA] STA has non ERP rates\n");
/* B only mode */
arg.internalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set)));
}
arg.nonErpInternalTxRate = (__ffs(le32_to_cpu(priv->association_mode.basic_rate_set)));
} else {
/* P2P mode */
arg.internalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF));
arg.nonErpInternalTxRate = (__ffs(priv->bss_params.operational_rate_set & ~0xF));
}
pr_debug("[STA] BTCOEX_INFO MODE %d, internalTxRate : %x, nonErpInternalTxRate: %x\n",
priv->mode,
arg.internalTxRate,
arg.nonErpInternalTxRate);
ret = wsm_write_mib(priv, WSM_MIB_ID_OVERRIDE_INTERNAL_TX_RATE,
&arg, sizeof(arg));
return ret;
}
void cw1200_bss_info_changed(struct ieee80211_hw *dev,
struct ieee80211_vif *vif,
struct ieee80211_bss_conf *info,
u32 changed)
{
struct cw1200_common *priv = dev->priv;
bool do_join = false;
mutex_lock(&priv->conf_mutex);
pr_debug("BSS CHANGED: %08x\n", changed);
/* TODO: BSS_CHANGED_QOS */
/* TODO: BSS_CHANGED_TXPOWER */
if (changed & BSS_CHANGED_ARP_FILTER) {
struct wsm_mib_arp_ipv4_filter filter = {0};
int i;
pr_debug("[STA] BSS_CHANGED_ARP_FILTER cnt: %d\n",
info->arp_addr_cnt);
/* Currently only one IP address is supported by firmware.
* In case of more IPs arp filtering will be disabled.
*/
if (info->arp_addr_cnt > 0 &&
info->arp_addr_cnt <= WSM_MAX_ARP_IP_ADDRTABLE_ENTRIES) {
for (i = 0; i < info->arp_addr_cnt; i++) {
filter.ipv4addrs[i] = info->arp_addr_list[i];
pr_debug("[STA] addr[%d]: 0x%X\n",
i, filter.ipv4addrs[i]);
}
filter.enable = __cpu_to_le32(1);
}
pr_debug("[STA] arp ip filter enable: %d\n",
__le32_to_cpu(filter.enable));
wsm_set_arp_ipv4_filter(priv, &filter);
}
if (changed &
(BSS_CHANGED_BEACON |
BSS_CHANGED_AP_PROBE_RESP |
BSS_CHANGED_BSSID |
BSS_CHANGED_SSID |
BSS_CHANGED_IBSS)) {
pr_debug("BSS_CHANGED_BEACON\n");
priv->beacon_int = info->beacon_int;
cw1200_update_beaconing(priv);
cw1200_upload_beacon(priv);
}
if (changed & BSS_CHANGED_BEACON_ENABLED) {
pr_debug("BSS_CHANGED_BEACON_ENABLED (%d)\n", info->enable_beacon);
if (priv->enable_beacon != info->enable_beacon) {
cw1200_enable_beaconing(priv, info->enable_beacon);
priv->enable_beacon = info->enable_beacon;
}
}
if (changed & BSS_CHANGED_BEACON_INT) {
pr_debug("CHANGED_BEACON_INT\n");
if (info->ibss_joined)
do_join = true;
else if (priv->join_status == CW1200_JOIN_STATUS_AP)
cw1200_update_beaconing(priv);
}
/* assoc/disassoc, or maybe AID changed */
if (changed & BSS_CHANGED_ASSOC) {
wsm_lock_tx(priv);
priv->wep_default_key_id = -1;
wsm_unlock_tx(priv);
}
if (changed & BSS_CHANGED_BSSID) {
pr_debug("BSS_CHANGED_BSSID\n");
do_join = true;
}
if (changed &
(BSS_CHANGED_ASSOC |
BSS_CHANGED_BSSID |
BSS_CHANGED_IBSS |
BSS_CHANGED_BASIC_RATES |
BSS_CHANGED_HT)) {
pr_debug("BSS_CHANGED_ASSOC\n");
if (info->assoc) {
if (priv->join_status < CW1200_JOIN_STATUS_PRE_STA) {
ieee80211_connection_loss(vif);
mutex_unlock(&priv->conf_mutex);
return;
} else if (priv->join_status == CW1200_JOIN_STATUS_PRE_STA) {
priv->join_status = CW1200_JOIN_STATUS_STA;
}
} else {
do_join = true;
}
if (info->assoc || info->ibss_joined) {
struct ieee80211_sta *sta = NULL;
__le32 htprot = 0;
if (info->dtim_period)
priv->join_dtim_period = info->dtim_period;
priv->beacon_int = info->beacon_int;
rcu_read_lock();
if (info->bssid && !info->ibss_joined)
sta = ieee80211_find_sta(vif, info->bssid);
if (sta) {
priv->ht_info.ht_cap = sta->ht_cap;
priv->bss_params.operational_rate_set =
cw1200_rate_mask_to_wsm(priv,
sta->supp_rates[priv->channel->band]);
priv->ht_info.channel_type = cfg80211_get_chandef_type(&dev->conf.chandef);
priv->ht_info.operation_mode = info->ht_operation_mode;
} else {
memset(&priv->ht_info, 0,
sizeof(priv->ht_info));
priv->bss_params.operational_rate_set = -1;
}
rcu_read_unlock();
/* Non Greenfield stations present */
if (priv->ht_info.operation_mode &
IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT)
htprot |= cpu_to_le32(WSM_NON_GREENFIELD_STA_PRESENT);
/* Set HT protection method */
htprot |= cpu_to_le32((priv->ht_info.operation_mode & IEEE80211_HT_OP_MODE_PROTECTION) << 2);
/* TODO:
* STBC_param.dual_cts
* STBC_param.LSIG_TXOP_FILL
*/
wsm_write_mib(priv, WSM_MIB_ID_SET_HT_PROTECTION,
&htprot, sizeof(htprot));
priv->association_mode.greenfield =
cw1200_ht_greenfield(&priv->ht_info);
priv->association_mode.flags =
WSM_ASSOCIATION_MODE_SNOOP_ASSOC_FRAMES |
WSM_ASSOCIATION_MODE_USE_PREAMBLE_TYPE |
WSM_ASSOCIATION_MODE_USE_HT_MODE |
WSM_ASSOCIATION_MODE_USE_BASIC_RATE_SET |
WSM_ASSOCIATION_MODE_USE_MPDU_START_SPACING;
priv->association_mode.preamble =
info->use_short_preamble ?
WSM_JOIN_PREAMBLE_SHORT :
WSM_JOIN_PREAMBLE_LONG;
priv->association_mode.basic_rate_set = __cpu_to_le32(
cw1200_rate_mask_to_wsm(priv,
info->basic_rates));
priv->association_mode.mpdu_start_spacing =
cw1200_ht_ampdu_density(&priv->ht_info);
cw1200_cqm_bssloss_sm(priv, 0, 0, 0);
cancel_work_sync(&priv->unjoin_work);
priv->bss_params.beacon_lost_count = priv->cqm_beacon_loss_count;
priv->bss_params.aid = info->aid;
if (priv->join_dtim_period < 1)
priv->join_dtim_period = 1;
pr_debug("[STA] DTIM %d, interval: %d\n",
priv->join_dtim_period, priv->beacon_int);
pr_debug("[STA] Preamble: %d, Greenfield: %d, Aid: %d, Rates: 0x%.8X, Basic: 0x%.8X\n",
priv->association_mode.preamble,
priv->association_mode.greenfield,
priv->bss_params.aid,
priv->bss_params.operational_rate_set,
priv->association_mode.basic_rate_set);
wsm_set_association_mode(priv, &priv->association_mode);
if (!info->ibss_joined) {
wsm_keep_alive_period(priv, 30 /* sec */);
wsm_set_bss_params(priv, &priv->bss_params);
priv->setbssparams_done = true;
cw1200_set_beacon_wakeup_period_work(&priv->set_beacon_wakeup_period_work);
cw1200_set_pm(priv, &priv->powersave_mode);
}
if (priv->vif->p2p) {
pr_debug("[STA] Setting p2p powersave configuration.\n");
wsm_set_p2p_ps_modeinfo(priv,
&priv->p2p_ps_modeinfo);
}
if (priv->bt_present)
cw1200_set_btcoexinfo(priv);
} else {
memset(&priv->association_mode, 0,
sizeof(priv->association_mode));
memset(&priv->bss_params, 0, sizeof(priv->bss_params));
}
}
/* ERP Protection */
if (changed & (BSS_CHANGED_ASSOC |
BSS_CHANGED_ERP_CTS_PROT |
BSS_CHANGED_ERP_PREAMBLE)) {
u32 prev_erp_info = priv->erp_info;
if (info->use_cts_prot)
priv->erp_info |= WLAN_ERP_USE_PROTECTION;
else if (!(prev_erp_info & WLAN_ERP_NON_ERP_PRESENT))
priv->erp_info &= ~WLAN_ERP_USE_PROTECTION;
if (info->use_short_preamble)
priv->erp_info |= WLAN_ERP_BARKER_PREAMBLE;
else
priv->erp_info &= ~WLAN_ERP_BARKER_PREAMBLE;
pr_debug("[STA] ERP Protection: %x\n", priv->erp_info);
if (prev_erp_info != priv->erp_info)
queue_work(priv->workqueue, &priv->set_cts_work);
}
/* ERP Slottime */
if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_SLOT)) {
__le32 slot_time = info->use_short_slot ?
__cpu_to_le32(9) : __cpu_to_le32(20);
pr_debug("[STA] Slot time: %d us.\n",
__le32_to_cpu(slot_time));
wsm_write_mib(priv, WSM_MIB_ID_DOT11_SLOT_TIME,
&slot_time, sizeof(slot_time));
}
if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_CQM)) {
struct wsm_rcpi_rssi_threshold threshold = {
.rollingAverageCount = 8,
};
pr_debug("[CQM] RSSI threshold subscribe: %d +- %d\n",
info->cqm_rssi_thold, info->cqm_rssi_hyst);
priv->cqm_rssi_thold = info->cqm_rssi_thold;
priv->cqm_rssi_hyst = info->cqm_rssi_hyst;
if (info->cqm_rssi_thold || info->cqm_rssi_hyst) {
/* RSSI subscription enabled */
/* TODO: It's not a correct way of setting threshold.
* Upper and lower must be set equal here and adjusted
* in callback. However current implementation is much
* more relaible and stable.
*/
/* RSSI: signed Q8.0, RCPI: unsigned Q7.1
* RSSI = RCPI / 2 - 110
*/
if (priv->cqm_use_rssi) {
threshold.upperThreshold =
info->cqm_rssi_thold + info->cqm_rssi_hyst;
threshold.lowerThreshold =
info->cqm_rssi_thold;
threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI;
} else {
threshold.upperThreshold = (info->cqm_rssi_thold + info->cqm_rssi_hyst + 110) * 2;
threshold.lowerThreshold = (info->cqm_rssi_thold + 110) * 2;
}
threshold.rssiRcpiMode |= WSM_RCPI_RSSI_THRESHOLD_ENABLE;
} else {
/* There is a bug in FW, see sta.c. We have to enable
* dummy subscription to get correct RSSI values.
*/
threshold.rssiRcpiMode |=
WSM_RCPI_RSSI_THRESHOLD_ENABLE |
WSM_RCPI_RSSI_DONT_USE_UPPER |
WSM_RCPI_RSSI_DONT_USE_LOWER;
if (priv->cqm_use_rssi)
threshold.rssiRcpiMode |= WSM_RCPI_RSSI_USE_RSSI;
}
wsm_set_rcpi_rssi_threshold(priv, &threshold);
}
mutex_unlock(&priv->conf_mutex);
if (do_join) {
wsm_lock_tx(priv);
cw1200_do_join(priv); /* Will unlock it for us */
}
}
void cw1200_multicast_start_work(struct work_struct *work)
{
struct cw1200_common *priv =
container_of(work, struct cw1200_common, multicast_start_work);
long tmo = priv->join_dtim_period *
(priv->beacon_int + 20) * HZ / 1024;
cancel_work_sync(&priv->multicast_stop_work);
if (!priv->aid0_bit_set) {
wsm_lock_tx(priv);
cw1200_set_tim_impl(priv, true);
priv->aid0_bit_set = true;
mod_timer(&priv->mcast_timeout, jiffies + tmo);
wsm_unlock_tx(priv);
}
}
void cw1200_multicast_stop_work(struct work_struct *work)
{
struct cw1200_common *priv =
container_of(work, struct cw1200_common, multicast_stop_work);
if (priv->aid0_bit_set) {
del_timer_sync(&priv->mcast_timeout);
wsm_lock_tx(priv);
priv->aid0_bit_set = false;
cw1200_set_tim_impl(priv, false);
wsm_unlock_tx(priv);
}
}
void cw1200_mcast_timeout(unsigned long arg)
{
struct cw1200_common *priv =
(struct cw1200_common *)arg;
wiphy_warn(priv->hw->wiphy,
"Multicast delivery timeout.\n");
spin_lock_bh(&priv->ps_state_lock);
priv->tx_multicast = priv->aid0_bit_set &&
priv->buffered_multicasts;
if (priv->tx_multicast)
cw1200_bh_wakeup(priv);
spin_unlock_bh(&priv->ps_state_lock);
}
int cw1200_ampdu_action(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
enum ieee80211_ampdu_mlme_action action,
struct ieee80211_sta *sta, u16 tid, u16 *ssn,
u8 buf_size)
{
/* Aggregation is implemented fully in firmware,
* including block ack negotiation. Do not allow
* mac80211 stack to do anything: it interferes with
* the firmware.
*/
/* Note that we still need this function stubbed. */
return -ENOTSUPP;
}
/* ******************************************************************** */
/* WSM callback */
void cw1200_suspend_resume(struct cw1200_common *priv,
struct wsm_suspend_resume *arg)
{
pr_debug("[AP] %s: %s\n",
arg->stop ? "stop" : "start",
arg->multicast ? "broadcast" : "unicast");
if (arg->multicast) {
bool cancel_tmo = false;
spin_lock_bh(&priv->ps_state_lock);
if (arg->stop) {
priv->tx_multicast = false;
} else {
/* Firmware sends this indication every DTIM if there
* is a STA in powersave connected. There is no reason
* to suspend, following wakeup will consume much more
* power than it could be saved.
*/
cw1200_pm_stay_awake(&priv->pm_state,
priv->join_dtim_period *
(priv->beacon_int + 20) * HZ / 1024);
priv->tx_multicast = (priv->aid0_bit_set &&
priv->buffered_multicasts);
if (priv->tx_multicast) {
cancel_tmo = true;
cw1200_bh_wakeup(priv);
}
}
spin_unlock_bh(&priv->ps_state_lock);
if (cancel_tmo)
del_timer_sync(&priv->mcast_timeout);
} else {
spin_lock_bh(&priv->ps_state_lock);
cw1200_ps_notify(priv, arg->link_id, arg->stop);
spin_unlock_bh(&priv->ps_state_lock);
if (!arg->stop)
cw1200_bh_wakeup(priv);
}
return;
}
/* ******************************************************************** */
/* AP privates */
static int cw1200_upload_beacon(struct cw1200_common *priv)
{
int ret = 0;
struct ieee80211_mgmt *mgmt;
struct wsm_template_frame frame = {
.frame_type = WSM_FRAME_TYPE_BEACON,
};
u16 tim_offset;
u16 tim_len;
if (priv->mode == NL80211_IFTYPE_STATION ||
priv->mode == NL80211_IFTYPE_MONITOR ||
priv->mode == NL80211_IFTYPE_UNSPECIFIED)
goto done;
if (priv->vif->p2p)
frame.rate = WSM_TRANSMIT_RATE_6;
frame.skb = ieee80211_beacon_get_tim(priv->hw, priv->vif,
&tim_offset, &tim_len);
if (!frame.skb)
return -ENOMEM;
ret = wsm_set_template_frame(priv, &frame);
if (ret)
goto done;
/* TODO: Distill probe resp; remove TIM
* and any other beacon-specific IEs
*/
mgmt = (void *)frame.skb->data;
mgmt->frame_control =
__cpu_to_le16(IEEE80211_FTYPE_MGMT |
IEEE80211_STYPE_PROBE_RESP);
frame.frame_type = WSM_FRAME_TYPE_PROBE_RESPONSE;
if (priv->vif->p2p) {
ret = wsm_set_probe_responder(priv, true);
} else {
ret = wsm_set_template_frame(priv, &frame);
wsm_set_probe_responder(priv, false);
}
done:
dev_kfree_skb(frame.skb);
return ret;
}
static int cw1200_upload_pspoll(struct cw1200_common *priv)
{
int ret = 0;
struct wsm_template_frame frame = {
.frame_type = WSM_FRAME_TYPE_PS_POLL,
.rate = 0xFF,
};
frame.skb = ieee80211_pspoll_get(priv->hw, priv->vif);
if (!frame.skb)
return -ENOMEM;
ret = wsm_set_template_frame(priv, &frame);
dev_kfree_skb(frame.skb);
return ret;
}
static int cw1200_upload_null(struct cw1200_common *priv)
{
int ret = 0;
struct wsm_template_frame frame = {
.frame_type = WSM_FRAME_TYPE_NULL,
.rate = 0xFF,
};
frame.skb = ieee80211_nullfunc_get(priv->hw, priv->vif);
if (!frame.skb)
return -ENOMEM;
ret = wsm_set_template_frame(priv, &frame);
dev_kfree_skb(frame.skb);
return ret;
}
static int cw1200_upload_qosnull(struct cw1200_common *priv)
{
int ret = 0;
/* TODO: This needs to be implemented
struct wsm_template_frame frame = {
.frame_type = WSM_FRAME_TYPE_QOS_NULL,
.rate = 0xFF,
};
frame.skb = ieee80211_qosnullfunc_get(priv->hw, priv->vif);
if (!frame.skb)
return -ENOMEM;
ret = wsm_set_template_frame(priv, &frame);
dev_kfree_skb(frame.skb);
*/
return ret;
}
static int cw1200_enable_beaconing(struct cw1200_common *priv,
bool enable)
{
struct wsm_beacon_transmit transmit = {
.enable_beaconing = enable,
};
return wsm_beacon_transmit(priv, &transmit);
}
static int cw1200_start_ap(struct cw1200_common *priv)
{
int ret;
struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
struct wsm_start start = {
.mode = priv->vif->p2p ?
WSM_START_MODE_P2P_GO : WSM_START_MODE_AP,
.band = (priv->channel->band == IEEE80211_BAND_5GHZ) ?
WSM_PHY_BAND_5G : WSM_PHY_BAND_2_4G,
.channel_number = priv->channel->hw_value,
.beacon_interval = conf->beacon_int,
.dtim_period = conf->dtim_period,
.preamble = conf->use_short_preamble ?
WSM_JOIN_PREAMBLE_SHORT :
WSM_JOIN_PREAMBLE_LONG,
.probe_delay = 100,
.basic_rate_set = cw1200_rate_mask_to_wsm(priv,
conf->basic_rates),
};
struct wsm_operational_mode mode = {
.power_mode = cw1200_power_mode,
.disable_more_flag_usage = true,
};
memset(start.ssid, 0, sizeof(start.ssid));
if (!conf->hidden_ssid) {
start.ssid_len = conf->ssid_len;
memcpy(start.ssid, conf->ssid, start.ssid_len);
}
priv->beacon_int = conf->beacon_int;
priv->join_dtim_period = conf->dtim_period;
memset(&priv->link_id_db, 0, sizeof(priv->link_id_db));
pr_debug("[AP] ch: %d(%d), bcn: %d(%d), brt: 0x%.8X, ssid: %.*s.\n",
start.channel_number, start.band,
start.beacon_interval, start.dtim_period,
start.basic_rate_set,
start.ssid_len, start.ssid);
ret = wsm_start(priv, &start);
if (!ret)
ret = cw1200_upload_keys(priv);
if (!ret && priv->vif->p2p) {
pr_debug("[AP] Setting p2p powersave configuration.\n");
wsm_set_p2p_ps_modeinfo(priv, &priv->p2p_ps_modeinfo);
}
if (!ret) {
wsm_set_block_ack_policy(priv, 0, 0);
priv->join_status = CW1200_JOIN_STATUS_AP;
cw1200_update_filtering(priv);
}
wsm_set_operational_mode(priv, &mode);
return ret;
}
static int cw1200_update_beaconing(struct cw1200_common *priv)
{
struct ieee80211_bss_conf *conf = &priv->vif->bss_conf;
struct wsm_reset reset = {
.link_id = 0,
.reset_statistics = true,
};
if (priv->mode == NL80211_IFTYPE_AP) {
/* TODO: check if changed channel, band */
if (priv->join_status != CW1200_JOIN_STATUS_AP ||
priv->beacon_int != conf->beacon_int) {
pr_debug("ap restarting\n");
wsm_lock_tx(priv);
if (priv->join_status != CW1200_JOIN_STATUS_PASSIVE)
wsm_reset(priv, &reset);
priv->join_status = CW1200_JOIN_STATUS_PASSIVE;
cw1200_start_ap(priv);
wsm_unlock_tx(priv);
} else
pr_debug("ap started join_status: %d\n",
priv->join_status);
}
return 0;
}
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