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linux/drivers/net/wireless/cw1200/sta.c
Peter Senna Tschudin 69253b6108 cw1200: Remove useless return variables 
This patch remove variables that are initialized with a constant,
are never updated, and are only used as parameter of return.
Return the constant instead of using a variable.

Verified by compilation only.

The coccinelle script that find and fixes this issue is:
// <smpl>
@@
type T;
constant C;
identifier ret;
@@
- T ret = C;
... when != ret
    when strict
return
- ret
+ C
;
// </smpl>

Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2014-06-19 15:49:12 -04:00

2402 lines
64 KiB
C
Raw Blame History

/*
* 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)
{
/* 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 0;
}
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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