blob: 03d0f224ffdbe9d7ae9b465a0b1c4d3e88115f8f [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0-only
/*
* Implementation of mac80211 API.
*
* Copyright (c) 2017-2019, Silicon Laboratories, Inc.
* Copyright (c) 2010, ST-Ericsson
*/
#include <net/mac80211.h>
#include "sta.h"
#include "wfx.h"
#include "fwio.h"
#include "bh.h"
#include "key.h"
#include "scan.h"
#include "debug.h"
#include "hif_tx.h"
#include "hif_tx_mib.h"
#define HIF_MAX_ARP_IP_ADDRTABLE_ENTRIES 2
u32 wfx_rate_mask_to_hw(struct wfx_dev *wdev, u32 rates)
{
int i;
u32 ret = 0;
// WFx only support 2GHz
struct ieee80211_supported_band *sband = wdev->hw->wiphy->bands[NL80211_BAND_2GHZ];
for (i = 0; i < sband->n_bitrates; i++) {
if (rates & BIT(i)) {
if (i >= sband->n_bitrates)
dev_warn(wdev->dev, "unsupported basic rate\n");
else
ret |= BIT(sband->bitrates[i].hw_value);
}
}
return ret;
}
static void __wfx_free_event_queue(struct list_head *list)
{
struct wfx_hif_event *event, *tmp;
list_for_each_entry_safe(event, tmp, list, link) {
list_del(&event->link);
kfree(event);
}
}
static void wfx_free_event_queue(struct wfx_vif *wvif)
{
LIST_HEAD(list);
spin_lock(&wvif->event_queue_lock);
list_splice_init(&wvif->event_queue, &list);
spin_unlock(&wvif->event_queue_lock);
__wfx_free_event_queue(&list);
}
void wfx_cqm_bssloss_sm(struct wfx_vif *wvif, int init, int good, int bad)
{
int tx = 0;
mutex_lock(&wvif->bss_loss_lock);
cancel_work_sync(&wvif->bss_params_work);
if (init) {
schedule_delayed_work(&wvif->bss_loss_work, HZ);
wvif->bss_loss_state = 0;
if (!atomic_read(&wvif->wdev->tx_lock))
tx = 1;
} else if (good) {
cancel_delayed_work_sync(&wvif->bss_loss_work);
wvif->bss_loss_state = 0;
schedule_work(&wvif->bss_params_work);
} else if (bad) {
/* FIXME Should we just keep going until we time out? */
if (wvif->bss_loss_state < 3)
tx = 1;
} else {
cancel_delayed_work_sync(&wvif->bss_loss_work);
wvif->bss_loss_state = 0;
}
/* Spit out a NULL packet to our AP if necessary */
// FIXME: call ieee80211_beacon_loss/ieee80211_connection_loss instead
if (tx) {
struct sk_buff *skb;
struct ieee80211_hdr *hdr;
struct ieee80211_tx_control control = { };
wvif->bss_loss_state++;
skb = ieee80211_nullfunc_get(wvif->wdev->hw, wvif->vif, false);
if (!skb)
goto end;
hdr = (struct ieee80211_hdr *)skb->data;
memset(IEEE80211_SKB_CB(skb), 0,
sizeof(*IEEE80211_SKB_CB(skb)));
IEEE80211_SKB_CB(skb)->control.vif = wvif->vif;
IEEE80211_SKB_CB(skb)->driver_rates[0].idx = 0;
IEEE80211_SKB_CB(skb)->driver_rates[0].count = 1;
IEEE80211_SKB_CB(skb)->driver_rates[1].idx = -1;
rcu_read_lock(); // protect control.sta
control.sta = ieee80211_find_sta(wvif->vif, hdr->addr1);
wfx_tx(wvif->wdev->hw, &control, skb);
rcu_read_unlock();
}
end:
mutex_unlock(&wvif->bss_loss_lock);
}
int wfx_fwd_probe_req(struct wfx_vif *wvif, bool enable)
{
wvif->fwd_probe_req = enable;
return hif_set_rx_filter(wvif, wvif->filter_bssid,
wvif->fwd_probe_req);
}
static int wfx_set_mcast_filter(struct wfx_vif *wvif,
struct wfx_grp_addr_table *fp)
{
int i;
// Temporary workaround for filters
return hif_set_data_filtering(wvif, false, true);
if (!fp->enable)
return hif_set_data_filtering(wvif, false, true);
for (i = 0; i < fp->num_addresses; i++)
hif_set_mac_addr_condition(wvif, i, fp->address_list[i]);
hif_set_uc_mc_bc_condition(wvif, 0,
HIF_FILTER_UNICAST | HIF_FILTER_BROADCAST);
hif_set_config_data_filter(wvif, true, 0, BIT(1),
BIT(fp->num_addresses) - 1);
hif_set_data_filtering(wvif, true, true);
return 0;
}
void wfx_update_filtering(struct wfx_vif *wvif)
{
int ret;
int bf_enable;
int bf_count;
int n_filter_ies;
struct hif_ie_table_entry filter_ies[] = {
{
.ie_id = WLAN_EID_VENDOR_SPECIFIC,
.has_changed = 1,
.no_longer = 1,
.has_appeared = 1,
.oui = { 0x50, 0x6F, 0x9A },
}, {
.ie_id = WLAN_EID_HT_OPERATION,
.has_changed = 1,
.no_longer = 1,
.has_appeared = 1,
}, {
.ie_id = WLAN_EID_ERP_INFO,
.has_changed = 1,
.no_longer = 1,
.has_appeared = 1,
}
};
if (wvif->state == WFX_STATE_PASSIVE)
return;
if (wvif->disable_beacon_filter) {
bf_enable = 0;
bf_count = 1;
n_filter_ies = 0;
} else if (wvif->vif->type != NL80211_IFTYPE_STATION) {
bf_enable = HIF_BEACON_FILTER_ENABLE | HIF_BEACON_FILTER_AUTO_ERP;
bf_count = 0;
n_filter_ies = 2;
} else {
bf_enable = HIF_BEACON_FILTER_ENABLE;
bf_count = 0;
n_filter_ies = 3;
}
ret = hif_set_rx_filter(wvif, wvif->filter_bssid, wvif->fwd_probe_req);
if (!ret)
ret = hif_set_beacon_filter_table(wvif, n_filter_ies, filter_ies);
if (!ret)
ret = hif_beacon_filter_control(wvif, bf_enable, bf_count);
if (!ret)
ret = wfx_set_mcast_filter(wvif, &wvif->mcast_filter);
if (ret)
dev_err(wvif->wdev->dev, "update filtering failed: %d\n", ret);
}
static void wfx_update_filtering_work(struct work_struct *work)
{
struct wfx_vif *wvif = container_of(work, struct wfx_vif,
update_filtering_work);
wfx_update_filtering(wvif);
}
u64 wfx_prepare_multicast(struct ieee80211_hw *hw,
struct netdev_hw_addr_list *mc_list)
{
int i;
struct netdev_hw_addr *ha;
struct wfx_vif *wvif = NULL;
struct wfx_dev *wdev = hw->priv;
int count = netdev_hw_addr_list_count(mc_list);
while ((wvif = wvif_iterate(wdev, wvif)) != NULL) {
memset(&wvif->mcast_filter, 0x00, sizeof(wvif->mcast_filter));
if (!count ||
count > ARRAY_SIZE(wvif->mcast_filter.address_list))
continue;
i = 0;
netdev_hw_addr_list_for_each(ha, mc_list) {
ether_addr_copy(wvif->mcast_filter.address_list[i],
ha->addr);
i++;
}
wvif->mcast_filter.enable = true;
wvif->mcast_filter.num_addresses = count;
}
return 0;
}
void wfx_configure_filter(struct ieee80211_hw *hw,
unsigned int changed_flags,
unsigned int *total_flags,
u64 unused)
{
struct wfx_vif *wvif = NULL;
struct wfx_dev *wdev = hw->priv;
*total_flags &= FIF_OTHER_BSS | FIF_FCSFAIL | FIF_PROBE_REQ;
while ((wvif = wvif_iterate(wdev, wvif)) != NULL) {
mutex_lock(&wvif->scan_lock);
wvif->filter_bssid = (*total_flags &
(FIF_OTHER_BSS | FIF_PROBE_REQ)) ? 0 : 1;
wvif->disable_beacon_filter = !(*total_flags & FIF_PROBE_REQ);
wfx_fwd_probe_req(wvif, true);
wfx_update_filtering(wvif);
mutex_unlock(&wvif->scan_lock);
}
}
static int wfx_update_pm(struct wfx_vif *wvif)
{
struct ieee80211_conf *conf = &wvif->wdev->hw->conf;
bool ps = conf->flags & IEEE80211_CONF_PS;
int ps_timeout = conf->dynamic_ps_timeout;
struct ieee80211_channel *chan0 = NULL, *chan1 = NULL;
WARN_ON(conf->dynamic_ps_timeout < 0);
if (wvif->state != WFX_STATE_STA || !wvif->bss_params.aid)
return 0;
if (!ps)
ps_timeout = 0;
if (wvif->uapsd_mask)
ps_timeout = 0;
// Kernel disable powersave when an AP is in use. In contrary, it is
// absolutely necessary to enable legacy powersave for WF200 if channels
// are differents.
if (wdev_to_wvif(wvif->wdev, 0))
chan0 = wdev_to_wvif(wvif->wdev, 0)->vif->bss_conf.chandef.chan;
if (wdev_to_wvif(wvif->wdev, 1))
chan1 = wdev_to_wvif(wvif->wdev, 1)->vif->bss_conf.chandef.chan;
if (chan0 && chan1 && chan0->hw_value != chan1->hw_value &&
wvif->vif->type != NL80211_IFTYPE_AP) {
ps = true;
ps_timeout = 0;
}
if (!wait_for_completion_timeout(&wvif->set_pm_mode_complete,
TU_TO_JIFFIES(512)))
dev_warn(wvif->wdev->dev,
"timeout while waiting of set_pm_mode_complete\n");
return hif_set_pm(wvif, ps, ps_timeout);
}
int wfx_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
u16 queue, const struct ieee80211_tx_queue_params *params)
{
struct wfx_dev *wdev = hw->priv;
struct wfx_vif *wvif = (struct wfx_vif *) vif->drv_priv;
int old_uapsd = wvif->uapsd_mask;
int ret = 0;
WARN_ON(queue >= hw->queues);
mutex_lock(&wdev->conf_mutex);
assign_bit(queue, &wvif->uapsd_mask, params->uapsd);
memcpy(&wvif->edca_params[queue], params, sizeof(*params));
hif_set_edca_queue_params(wvif, queue, params);
if (wvif->vif->type == NL80211_IFTYPE_STATION &&
old_uapsd != wvif->uapsd_mask) {
hif_set_uapsd_info(wvif, wvif->uapsd_mask);
wfx_update_pm(wvif);
}
mutex_unlock(&wdev->conf_mutex);
return ret;
}
int wfx_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
{
struct wfx_dev *wdev = hw->priv;
struct wfx_vif *wvif = NULL;
while ((wvif = wvif_iterate(wdev, wvif)) != NULL)
hif_rts_threshold(wvif, value);
return 0;
}
static int __wfx_flush(struct wfx_dev *wdev, bool drop)
{
for (;;) {
if (drop)
wfx_tx_queues_clear(wdev);
if (wait_event_timeout(wdev->tx_queue_stats.wait_link_id_empty,
wfx_tx_queues_is_empty(wdev),
2 * HZ) <= 0)
return -ETIMEDOUT;
wfx_tx_flush(wdev);
if (wfx_tx_queues_is_empty(wdev))
return 0;
dev_warn(wdev->dev, "frames queued while flushing tx queues");
}
}
void wfx_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
u32 queues, bool drop)
{
// FIXME: only flush requested vif and queues
__wfx_flush(hw->priv, drop);
}
/* WSM callbacks */
static void wfx_event_report_rssi(struct wfx_vif *wvif, u8 raw_rcpi_rssi)
{
/* RSSI: signed Q8.0, RCPI: unsigned Q7.1
* RSSI = RCPI / 2 - 110
*/
int rcpi_rssi;
int cqm_evt;
rcpi_rssi = raw_rcpi_rssi / 2 - 110;
if (rcpi_rssi <= wvif->vif->bss_conf.cqm_rssi_thold)
cqm_evt = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
else
cqm_evt = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
ieee80211_cqm_rssi_notify(wvif->vif, cqm_evt, rcpi_rssi, GFP_KERNEL);
}
static void wfx_event_handler_work(struct work_struct *work)
{
struct wfx_vif *wvif =
container_of(work, struct wfx_vif, event_handler_work);
struct wfx_hif_event *event;
LIST_HEAD(list);
spin_lock(&wvif->event_queue_lock);
list_splice_init(&wvif->event_queue, &list);
spin_unlock(&wvif->event_queue_lock);
list_for_each_entry(event, &list, link) {
switch (event->evt.event_id) {
case HIF_EVENT_IND_BSSLOST:
cancel_work_sync(&wvif->unjoin_work);
mutex_lock(&wvif->scan_lock);
wfx_cqm_bssloss_sm(wvif, 1, 0, 0);
mutex_unlock(&wvif->scan_lock);
break;
case HIF_EVENT_IND_BSSREGAINED:
wfx_cqm_bssloss_sm(wvif, 0, 0, 0);
cancel_work_sync(&wvif->unjoin_work);
break;
case HIF_EVENT_IND_RCPI_RSSI:
wfx_event_report_rssi(wvif,
event->evt.event_data.rcpi_rssi);
break;
case HIF_EVENT_IND_PS_MODE_ERROR:
dev_warn(wvif->wdev->dev,
"error while processing power save request\n");
break;
default:
dev_warn(wvif->wdev->dev,
"unhandled event indication: %.2x\n",
event->evt.event_id);
break;
}
}
__wfx_free_event_queue(&list);
}
static void wfx_bss_loss_work(struct work_struct *work)
{
struct wfx_vif *wvif = container_of(work, struct wfx_vif,
bss_loss_work.work);
ieee80211_connection_loss(wvif->vif);
}
static void wfx_bss_params_work(struct work_struct *work)
{
struct wfx_vif *wvif = container_of(work, struct wfx_vif,
bss_params_work);
mutex_lock(&wvif->wdev->conf_mutex);
wvif->bss_params.bss_flags.lost_count_only = 1;
hif_set_bss_params(wvif, &wvif->bss_params);
wvif->bss_params.bss_flags.lost_count_only = 0;
mutex_unlock(&wvif->wdev->conf_mutex);
}
static void wfx_do_unjoin(struct wfx_vif *wvif)
{
mutex_lock(&wvif->wdev->conf_mutex);
if (!wvif->state)
goto done;
if (wvif->state == WFX_STATE_AP)
goto done;
cancel_work_sync(&wvif->update_filtering_work);
wvif->state = WFX_STATE_PASSIVE;
/* Unjoin is a reset. */
wfx_tx_flush(wvif->wdev);
hif_keep_alive_period(wvif, 0);
hif_reset(wvif, false);
wfx_tx_policy_init(wvif);
hif_set_macaddr(wvif, wvif->vif->addr);
wfx_free_event_queue(wvif);
cancel_work_sync(&wvif->event_handler_work);
wfx_cqm_bssloss_sm(wvif, 0, 0, 0);
/* Disable Block ACKs */
hif_set_block_ack_policy(wvif, 0, 0);
wvif->disable_beacon_filter = false;
wfx_update_filtering(wvif);
memset(&wvif->bss_params, 0, sizeof(wvif->bss_params));
done:
mutex_unlock(&wvif->wdev->conf_mutex);
}
static void wfx_set_mfp(struct wfx_vif *wvif,
struct cfg80211_bss *bss)
{
const int pairwise_cipher_suite_count_offset = 8 / sizeof(u16);
const int pairwise_cipher_suite_size = 4 / sizeof(u16);
const int akm_suite_size = 4 / sizeof(u16);
const u16 *ptr = NULL;
bool mfpc = false;
bool mfpr = false;
/* 802.11w protected mgmt frames */
/* retrieve MFPC and MFPR flags from beacon or PBRSP */
rcu_read_lock();
if (bss)
ptr = (const u16 *) ieee80211_bss_get_ie(bss,
WLAN_EID_RSN);
if (ptr) {
ptr += pairwise_cipher_suite_count_offset;
ptr += 1 + pairwise_cipher_suite_size * *ptr;
ptr += 1 + akm_suite_size * *ptr;
mfpr = *ptr & BIT(6);
mfpc = *ptr & BIT(7);
}
rcu_read_unlock();
hif_set_mfp(wvif, mfpc, mfpr);
}
static void wfx_do_join(struct wfx_vif *wvif)
{
int ret;
const u8 *ssidie;
struct ieee80211_bss_conf *conf = &wvif->vif->bss_conf;
struct cfg80211_bss *bss = NULL;
wfx_tx_lock_flush(wvif->wdev);
if (wvif->state)
wfx_do_unjoin(wvif);
bss = cfg80211_get_bss(wvif->wdev->hw->wiphy, wvif->channel,
conf->bssid, NULL, 0,
IEEE80211_BSS_TYPE_ANY, IEEE80211_PRIVACY_ANY);
if (!bss && !conf->ibss_joined) {
wfx_tx_unlock(wvif->wdev);
return;
}
mutex_lock(&wvif->wdev->conf_mutex);
/* Sanity check beacon interval */
if (!wvif->beacon_int)
wvif->beacon_int = 1;
rcu_read_lock();
if (!conf->ibss_joined)
ssidie = ieee80211_bss_get_ie(bss, WLAN_EID_SSID);
else
ssidie = NULL;
wfx_tx_flush(wvif->wdev);
if (wvif_count(wvif->wdev) <= 1)
hif_set_block_ack_policy(wvif, 0xFF, 0xFF);
wfx_set_mfp(wvif, bss);
/* Perform actual join */
wvif->wdev->tx_burst_idx = -1;
ret = hif_join(wvif, conf, wvif->channel, ssidie);
rcu_read_unlock();
if (ret) {
ieee80211_connection_loss(wvif->vif);
wvif->join_complete_status = -1;
/* Tx lock still held, unjoin will clear it. */
if (!schedule_work(&wvif->unjoin_work))
wfx_tx_unlock(wvif->wdev);
} else {
wvif->join_complete_status = 0;
if (wvif->vif->type == NL80211_IFTYPE_ADHOC)
wvif->state = WFX_STATE_IBSS;
else
wvif->state = WFX_STATE_PRE_STA;
wfx_tx_unlock(wvif->wdev);
/* Upload keys */
wfx_upload_keys(wvif);
/* 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
*/
wvif->disable_beacon_filter = true;
}
wfx_update_filtering(wvif);
mutex_unlock(&wvif->wdev->conf_mutex);
if (bss)
cfg80211_put_bss(wvif->wdev->hw->wiphy, bss);
}
static void wfx_unjoin_work(struct work_struct *work)
{
struct wfx_vif *wvif = container_of(work, struct wfx_vif, unjoin_work);
wfx_do_unjoin(wvif);
wfx_tx_unlock(wvif->wdev);
}
int wfx_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
struct ieee80211_sta *sta)
{
struct wfx_vif *wvif = (struct wfx_vif *) vif->drv_priv;
struct wfx_sta_priv *sta_priv = (struct wfx_sta_priv *) &sta->drv_priv;
spin_lock_init(&sta_priv->lock);
sta_priv->vif_id = wvif->id;
// FIXME: in station mode, the current API interprets new link-id as a
// tdls peer.
if (vif->type == NL80211_IFTYPE_STATION)
return 0;
sta_priv->link_id = ffz(wvif->link_id_map);
wvif->link_id_map |= BIT(sta_priv->link_id);
WARN_ON(!sta_priv->link_id);
WARN_ON(sta_priv->link_id >= WFX_MAX_STA_IN_AP_MODE);
hif_map_link(wvif, sta->addr, 0, sta_priv->link_id);
spin_lock_bh(&wvif->ps_state_lock);
if ((sta->uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK) ==
IEEE80211_WMM_IE_STA_QOSINFO_AC_MASK)
wvif->sta_asleep_mask |= BIT(sta_priv->link_id);
spin_unlock_bh(&wvif->ps_state_lock);
return 0;
}
int wfx_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
struct ieee80211_sta *sta)
{
struct wfx_vif *wvif = (struct wfx_vif *) vif->drv_priv;
struct wfx_sta_priv *sta_priv = (struct wfx_sta_priv *) &sta->drv_priv;
int i;
for (i = 0; i < ARRAY_SIZE(sta_priv->buffered); i++)
WARN(sta_priv->buffered[i], "release station while Tx is in progress");
// FIXME: see note in wfx_sta_add()
if (vif->type == NL80211_IFTYPE_STATION)
return 0;
// FIXME add a mutex?
hif_map_link(wvif, sta->addr, 1, sta_priv->link_id);
wvif->link_id_map &= ~BIT(sta_priv->link_id);
return 0;
}
static int wfx_start_ap(struct wfx_vif *wvif)
{
int ret;
wvif->beacon_int = wvif->vif->bss_conf.beacon_int;
wvif->wdev->tx_burst_idx = -1;
ret = hif_start(wvif, &wvif->vif->bss_conf, wvif->channel);
if (ret)
return ret;
ret = wfx_upload_keys(wvif);
if (ret)
return ret;
if (wvif_count(wvif->wdev) <= 1)
hif_set_block_ack_policy(wvif, 0xFF, 0xFF);
wvif->state = WFX_STATE_AP;
wfx_update_filtering(wvif);
return 0;
}
static int wfx_update_beaconing(struct wfx_vif *wvif)
{
if (wvif->vif->type != NL80211_IFTYPE_AP)
return 0;
if (wvif->state == WFX_STATE_AP &&
wvif->beacon_int == wvif->vif->bss_conf.beacon_int)
return 0;
wfx_tx_lock_flush(wvif->wdev);
hif_reset(wvif, false);
wfx_tx_policy_init(wvif);
wvif->state = WFX_STATE_PASSIVE;
wfx_start_ap(wvif);
wfx_tx_unlock(wvif->wdev);
return 0;
}
static int wfx_upload_ap_templates(struct wfx_vif *wvif)
{
struct sk_buff *skb;
if (wvif->vif->type == NL80211_IFTYPE_STATION ||
wvif->vif->type == NL80211_IFTYPE_MONITOR ||
wvif->vif->type == NL80211_IFTYPE_UNSPECIFIED)
return 0;
skb = ieee80211_beacon_get(wvif->wdev->hw, wvif->vif);
if (!skb)
return -ENOMEM;
hif_set_template_frame(wvif, skb, HIF_TMPLT_BCN,
API_RATE_INDEX_B_1MBPS);
dev_kfree_skb(skb);
skb = ieee80211_proberesp_get(wvif->wdev->hw, wvif->vif);
if (!skb)
return -ENOMEM;
hif_set_template_frame(wvif, skb, HIF_TMPLT_PRBRES,
API_RATE_INDEX_B_1MBPS);
dev_kfree_skb(skb);
return 0;
}
static void wfx_join_finalize(struct wfx_vif *wvif,
struct ieee80211_bss_conf *info)
{
struct ieee80211_sta *sta = NULL;
wvif->beacon_int = info->beacon_int;
rcu_read_lock(); // protect sta
if (info->bssid && !info->ibss_joined)
sta = ieee80211_find_sta(wvif->vif, info->bssid);
if (sta)
wvif->bss_params.operational_rate_set =
wfx_rate_mask_to_hw(wvif->wdev, sta->supp_rates[wvif->channel->band]);
else
wvif->bss_params.operational_rate_set = -1;
if (sta &&
info->ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT)
hif_dual_cts_protection(wvif, true);
else
hif_dual_cts_protection(wvif, false);
wfx_cqm_bssloss_sm(wvif, 0, 0, 0);
cancel_work_sync(&wvif->unjoin_work);
wvif->bss_params.beacon_lost_count = 20;
wvif->bss_params.aid = info->aid;
hif_set_association_mode(wvif, info, sta ? &sta->ht_cap : NULL);
rcu_read_unlock();
if (!info->ibss_joined) {
hif_keep_alive_period(wvif, 30 /* sec */);
hif_set_bss_params(wvif, &wvif->bss_params);
hif_set_beacon_wakeup_period(wvif, info->dtim_period,
info->dtim_period);
wfx_update_pm(wvif);
}
}
void wfx_bss_info_changed(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_bss_conf *info,
u32 changed)
{
struct wfx_dev *wdev = hw->priv;
struct wfx_vif *wvif = (struct wfx_vif *) vif->drv_priv;
bool do_join = false;
int i;
mutex_lock(&wdev->conf_mutex);
/* TODO: BSS_CHANGED_QOS */
if (changed & BSS_CHANGED_ARP_FILTER) {
for (i = 0; i < HIF_MAX_ARP_IP_ADDRTABLE_ENTRIES; i++) {
__be32 *arp_addr = &info->arp_addr_list[i];
if (info->arp_addr_cnt > HIF_MAX_ARP_IP_ADDRTABLE_ENTRIES)
arp_addr = NULL;
if (i >= info->arp_addr_cnt)
arp_addr = NULL;
hif_set_arp_ipv4_filter(wvif, i, arp_addr);
}
}
if (changed & BSS_CHANGED_BEACON ||
changed & BSS_CHANGED_AP_PROBE_RESP ||
changed & BSS_CHANGED_BSSID ||
changed & BSS_CHANGED_SSID ||
changed & BSS_CHANGED_IBSS) {
wvif->beacon_int = info->beacon_int;
wfx_update_beaconing(wvif);
wfx_upload_ap_templates(wvif);
wfx_fwd_probe_req(wvif, false);
}
if (changed & BSS_CHANGED_BEACON_ENABLED &&
wvif->state != WFX_STATE_IBSS)
hif_beacon_transmit(wvif, info->enable_beacon);
if (changed & BSS_CHANGED_BEACON_INFO)
hif_set_beacon_wakeup_period(wvif, info->dtim_period,
info->dtim_period);
/* assoc/disassoc, or maybe AID changed */
if (changed & BSS_CHANGED_ASSOC) {
wfx_tx_lock_flush(wdev);
wvif->wep_default_key_id = -1;
wfx_tx_unlock(wdev);
}
if (changed & BSS_CHANGED_ASSOC && !info->assoc &&
(wvif->state == WFX_STATE_STA || wvif->state == WFX_STATE_IBSS)) {
/* Shedule unjoin work */
wfx_tx_lock(wdev);
if (!schedule_work(&wvif->unjoin_work))
wfx_tx_unlock(wdev);
} else {
if (changed & BSS_CHANGED_BEACON_INT) {
if (info->ibss_joined)
do_join = true;
else if (wvif->state == WFX_STATE_AP)
wfx_update_beaconing(wvif);
}
if (changed & BSS_CHANGED_BSSID)
do_join = true;
if (changed & BSS_CHANGED_ASSOC ||
changed & BSS_CHANGED_BSSID ||
changed & BSS_CHANGED_IBSS ||
changed & BSS_CHANGED_BASIC_RATES ||
changed & BSS_CHANGED_HT) {
if (info->assoc) {
if (wvif->state < WFX_STATE_PRE_STA) {
ieee80211_connection_loss(vif);
mutex_unlock(&wdev->conf_mutex);
return;
} else if (wvif->state == WFX_STATE_PRE_STA) {
wvif->state = WFX_STATE_STA;
}
} else {
do_join = true;
}
if (info->assoc || info->ibss_joined)
wfx_join_finalize(wvif, info);
else
memset(&wvif->bss_params, 0,
sizeof(wvif->bss_params));
}
}
if (changed & BSS_CHANGED_ASSOC ||
changed & BSS_CHANGED_ERP_CTS_PROT ||
changed & BSS_CHANGED_ERP_PREAMBLE) {
u8 erp_ie[3] = { WLAN_EID_ERP_INFO, 1, 0 };
hif_erp_use_protection(wvif, info->use_cts_prot);
if (info->use_cts_prot)
erp_ie[2] |= WLAN_ERP_USE_PROTECTION;
if (info->use_short_preamble)
erp_ie[2] |= WLAN_ERP_BARKER_PREAMBLE;
if (wvif->vif->type != NL80211_IFTYPE_STATION)
hif_update_ie_beacon(wvif, erp_ie, sizeof(erp_ie));
}
if (changed & BSS_CHANGED_ASSOC || changed & BSS_CHANGED_ERP_SLOT)
hif_slot_time(wvif, info->use_short_slot ? 9 : 20);
if (changed & BSS_CHANGED_ASSOC || changed & BSS_CHANGED_CQM)
hif_set_rcpi_rssi_threshold(wvif, info->cqm_rssi_thold,
info->cqm_rssi_hyst);
if (changed & BSS_CHANGED_TXPOWER)
hif_set_output_power(wvif, info->txpower);
if (changed & BSS_CHANGED_PS)
wfx_update_pm(wvif);
mutex_unlock(&wdev->conf_mutex);
if (do_join)
wfx_do_join(wvif);
}
static void wfx_ps_notify_sta(struct wfx_vif *wvif,
enum sta_notify_cmd notify_cmd, int link_id)
{
spin_lock_bh(&wvif->ps_state_lock);
if (notify_cmd == STA_NOTIFY_SLEEP)
wvif->sta_asleep_mask |= BIT(link_id);
else // notify_cmd == STA_NOTIFY_AWAKE
wvif->sta_asleep_mask &= ~BIT(link_id);
spin_unlock_bh(&wvif->ps_state_lock);
if (notify_cmd == STA_NOTIFY_AWAKE)
wfx_bh_request_tx(wvif->wdev);
}
void wfx_sta_notify(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
enum sta_notify_cmd notify_cmd, struct ieee80211_sta *sta)
{
struct wfx_vif *wvif = (struct wfx_vif *) vif->drv_priv;
struct wfx_sta_priv *sta_priv = (struct wfx_sta_priv *) &sta->drv_priv;
wfx_ps_notify_sta(wvif, notify_cmd, sta_priv->link_id);
}
static int wfx_update_tim(struct wfx_vif *wvif)
{
struct sk_buff *skb;
u16 tim_offset, tim_length;
u8 *tim_ptr;
skb = ieee80211_beacon_get_tim(wvif->wdev->hw, wvif->vif,
&tim_offset, &tim_length);
if (!skb) {
__wfx_flush(wvif->wdev, true);
return -ENOENT;
}
tim_ptr = skb->data + tim_offset;
if (tim_offset && tim_length >= 6) {
/* Ignore DTIM count from mac80211:
* firmware handles DTIM internally.
*/
tim_ptr[2] = 0;
/* Set/reset aid0 bit */
if (wfx_tx_queues_get_after_dtim(wvif))
tim_ptr[4] |= 1;
else
tim_ptr[4] &= ~1;
}
hif_update_ie_beacon(wvif, tim_ptr, tim_length);
dev_kfree_skb(skb);
return 0;
}
static void wfx_update_tim_work(struct work_struct *work)
{
struct wfx_vif *wvif = container_of(work, struct wfx_vif, update_tim_work);
wfx_update_tim(wvif);
}
int wfx_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta, bool set)
{
struct wfx_dev *wdev = hw->priv;
struct wfx_sta_priv *sta_dev = (struct wfx_sta_priv *) &sta->drv_priv;
struct wfx_vif *wvif = wdev_to_wvif(wdev, sta_dev->vif_id);
schedule_work(&wvif->update_tim_work);
return 0;
}
void wfx_suspend_resume_mc(struct wfx_vif *wvif, enum sta_notify_cmd notify_cmd)
{
WARN(!wfx_tx_queues_get_after_dtim(wvif), "incorrect sequence");
WARN(wvif->after_dtim_tx_allowed, "incorrect sequence");
wvif->after_dtim_tx_allowed = true;
wfx_bh_request_tx(wvif->wdev);
}
int wfx_ampdu_action(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_ampdu_params *params)
{
/* 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;
}
int wfx_add_chanctx(struct ieee80211_hw *hw,
struct ieee80211_chanctx_conf *conf)
{
return 0;
}
void wfx_remove_chanctx(struct ieee80211_hw *hw,
struct ieee80211_chanctx_conf *conf)
{
}
void wfx_change_chanctx(struct ieee80211_hw *hw,
struct ieee80211_chanctx_conf *conf,
u32 changed)
{
}
int wfx_assign_vif_chanctx(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
struct ieee80211_chanctx_conf *conf)
{
struct wfx_vif *wvif = (struct wfx_vif *) vif->drv_priv;
struct ieee80211_channel *ch = conf->def.chan;
WARN(wvif->channel, "channel overwrite");
wvif->channel = ch;
return 0;
}
void wfx_unassign_vif_chanctx(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_chanctx_conf *conf)
{
struct wfx_vif *wvif = (struct wfx_vif *) vif->drv_priv;
struct ieee80211_channel *ch = conf->def.chan;
WARN(wvif->channel != ch, "channel mismatch");
wvif->channel = NULL;
}
int wfx_config(struct ieee80211_hw *hw, u32 changed)
{
return 0;
}
int wfx_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
{
int i, ret = 0;
struct wfx_dev *wdev = hw->priv;
struct wfx_vif *wvif = (struct wfx_vif *) vif->drv_priv;
vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
IEEE80211_VIF_SUPPORTS_UAPSD |
IEEE80211_VIF_SUPPORTS_CQM_RSSI;
mutex_lock(&wdev->conf_mutex);
switch (vif->type) {
case NL80211_IFTYPE_STATION:
case NL80211_IFTYPE_ADHOC:
case NL80211_IFTYPE_AP:
break;
default:
mutex_unlock(&wdev->conf_mutex);
return -EOPNOTSUPP;
}
for (i = 0; i < ARRAY_SIZE(wdev->vif); i++) {
if (!wdev->vif[i]) {
wdev->vif[i] = vif;
wvif->id = i;
break;
}
}
if (i == ARRAY_SIZE(wdev->vif)) {
mutex_unlock(&wdev->conf_mutex);
return -EOPNOTSUPP;
}
// FIXME: prefer use of container_of() to get vif
wvif->vif = vif;
wvif->wdev = wdev;
wvif->link_id_map = 1; // link-id 0 is reserved for multicast
spin_lock_init(&wvif->ps_state_lock);
INIT_WORK(&wvif->update_tim_work, wfx_update_tim_work);
memset(&wvif->bss_params, 0, sizeof(wvif->bss_params));
mutex_init(&wvif->bss_loss_lock);
INIT_DELAYED_WORK(&wvif->bss_loss_work, wfx_bss_loss_work);
wvif->wep_default_key_id = -1;
INIT_WORK(&wvif->wep_key_work, wfx_wep_key_work);
spin_lock_init(&wvif->event_queue_lock);
INIT_LIST_HEAD(&wvif->event_queue);
INIT_WORK(&wvif->event_handler_work, wfx_event_handler_work);
init_completion(&wvif->set_pm_mode_complete);
complete(&wvif->set_pm_mode_complete);
INIT_WORK(&wvif->update_filtering_work, wfx_update_filtering_work);
INIT_WORK(&wvif->bss_params_work, wfx_bss_params_work);
INIT_WORK(&wvif->unjoin_work, wfx_unjoin_work);
INIT_WORK(&wvif->tx_policy_upload_work, wfx_tx_policy_upload_work);
mutex_init(&wvif->scan_lock);
init_completion(&wvif->scan_complete);
INIT_WORK(&wvif->scan_work, wfx_hw_scan_work);
INIT_WORK(&wvif->tx_policy_upload_work, wfx_tx_policy_upload_work);
mutex_unlock(&wdev->conf_mutex);
hif_set_macaddr(wvif, vif->addr);
wfx_tx_policy_init(wvif);
wvif = NULL;
while ((wvif = wvif_iterate(wdev, wvif)) != NULL) {
// Combo mode does not support Block Acks. We can re-enable them
if (wvif_count(wdev) == 1)
hif_set_block_ack_policy(wvif, 0xFF, 0xFF);
else
hif_set_block_ack_policy(wvif, 0x00, 0x00);
// Combo force powersave mode. We can re-enable it now
ret = wfx_update_pm(wvif);
}
return ret;
}
void wfx_remove_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct wfx_dev *wdev = hw->priv;
struct wfx_vif *wvif = (struct wfx_vif *) vif->drv_priv;
wait_for_completion_timeout(&wvif->set_pm_mode_complete, msecs_to_jiffies(300));
mutex_lock(&wdev->conf_mutex);
WARN(wvif->link_id_map != 1, "corrupted state");
switch (wvif->state) {
case WFX_STATE_PRE_STA:
case WFX_STATE_STA:
case WFX_STATE_IBSS:
wfx_tx_lock_flush(wdev);
if (!schedule_work(&wvif->unjoin_work))
wfx_tx_unlock(wdev);
break;
case WFX_STATE_AP:
wvif->sta_asleep_mask = 0;
/* reset.link_id = 0; */
hif_reset(wvif, false);
break;
default:
break;
}
wvif->state = WFX_STATE_PASSIVE;
wfx_tx_queues_wait_empty_vif(wvif);
wfx_tx_unlock(wdev);
/* FIXME: In add to reset MAC address, try to reset interface */
hif_set_macaddr(wvif, NULL);
wfx_cqm_bssloss_sm(wvif, 0, 0, 0);
cancel_work_sync(&wvif->unjoin_work);
wfx_free_event_queue(wvif);
wdev->vif[wvif->id] = NULL;
wvif->vif = NULL;
mutex_unlock(&wdev->conf_mutex);
wvif = NULL;
while ((wvif = wvif_iterate(wdev, wvif)) != NULL) {
// Combo mode does not support Block Acks. We can re-enable them
if (wvif_count(wdev) == 1)
hif_set_block_ack_policy(wvif, 0xFF, 0xFF);
else
hif_set_block_ack_policy(wvif, 0x00, 0x00);
// Combo force powersave mode. We can re-enable it now
wfx_update_pm(wvif);
}
}
int wfx_start(struct ieee80211_hw *hw)
{
return 0;
}
void wfx_stop(struct ieee80211_hw *hw)
{
struct wfx_dev *wdev = hw->priv;
wfx_tx_lock_flush(wdev);
mutex_lock(&wdev->conf_mutex);
wfx_tx_queues_clear(wdev);
mutex_unlock(&wdev->conf_mutex);
wfx_tx_unlock(wdev);
WARN(atomic_read(&wdev->tx_lock), "tx_lock is locked");
}