// SPDX-License-Identifier: GPL-2.0-only
/*
* NXP Wireless LAN device driver : 802 . 11 h
*
* Copyright 2011 - 2020 NXP
*/
#include "main.h"
#include "fw.h"
void mwifiex_init_11h_params(struct mwifiex_private *priv)
{
priv->state_11h.is_11h_enabled = true ;
priv->state_11h.is_11h_active = false ;
}
inline int mwifiex_is_11h_active(struct mwifiex_private *priv)
{
return priv->state_11h.is_11h_active;
}
/* This function appends 11h info to a buffer while joining an
* infrastructure BSS
*/
static void
mwifiex_11h_process_infra_join(struct mwifiex_private *priv, u8 **buffer,
struct mwifiex_bssdescriptor *bss_desc)
{
struct mwifiex_ie_types_header *ie_header;
struct mwifiex_ie_types_pwr_capability *cap;
struct mwifiex_ie_types_local_pwr_constraint *constraint;
struct ieee80211_supported_band *sband;
u8 radio_type;
int i;
if (!buffer || !(*buffer))
return ;
radio_type = mwifiex_band_to_radio_type((u8) bss_desc->bss_band);
sband = priv->wdev.wiphy->bands[radio_type];
cap = (struct mwifiex_ie_types_pwr_capability *)*buffer;
cap->header.type = cpu_to_le16(WLAN_EID_PWR_CAPABILITY);
cap->header.len = cpu_to_le16(2 );
cap->min_pwr = 0 ;
cap->max_pwr = 0 ;
*buffer += sizeof (*cap);
constraint = (struct mwifiex_ie_types_local_pwr_constraint *)*buffer;
constraint->header.type = cpu_to_le16(WLAN_EID_PWR_CONSTRAINT);
constraint->header.len = cpu_to_le16(2 );
constraint->chan = bss_desc->channel;
constraint->constraint = bss_desc->local_constraint;
*buffer += sizeof (*constraint);
ie_header = (struct mwifiex_ie_types_header *)*buffer;
ie_header->type = cpu_to_le16(TLV_TYPE_PASSTHROUGH);
ie_header->len = cpu_to_le16(2 * sband->n_channels + 2 );
*buffer += sizeof (*ie_header);
*(*buffer)++ = WLAN_EID_SUPPORTED_CHANNELS;
*(*buffer)++ = 2 * sband->n_channels;
for (i = 0 ; i < sband->n_channels; i++) {
*(*buffer)++ = ieee80211_frequency_to_channel(
sband->channels[i].center_freq);
*(*buffer)++ = 1 ; /* one channel in the subband */
}
}
/* Enable or disable the 11h extensions in the firmware */
int mwifiex_11h_activate(struct mwifiex_private *priv, bool flag)
{
u32 enable = flag;
/* enable master mode radar detection on AP interface */
if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) && enable)
enable |= MWIFIEX_MASTER_RADAR_DET_MASK;
return mwifiex_send_cmd(priv, HostCmd_CMD_802_11_SNMP_MIB,
HostCmd_ACT_GEN_SET, DOT11H_I, &enable, true );
}
/* This functions processes TLV buffer for a pending BSS Join command.
*
* Activate 11 h functionality in the firmware if the spectrum management
* capability bit is found in the network we are joining . Also , necessary
* TLVs are set based on requested network ' s 11 h capability .
*/
void mwifiex_11h_process_join(struct mwifiex_private *priv, u8 **buffer,
struct mwifiex_bssdescriptor *bss_desc)
{
if (bss_desc->sensed_11h) {
/* Activate 11h functions in firmware, turns on capability
* bit
*/
mwifiex_11h_activate(priv, true );
priv->state_11h.is_11h_active = true ;
bss_desc->cap_info_bitmap |= WLAN_CAPABILITY_SPECTRUM_MGMT;
mwifiex_11h_process_infra_join(priv, buffer, bss_desc);
} else {
/* Deactivate 11h functions in the firmware */
mwifiex_11h_activate(priv, false );
priv->state_11h.is_11h_active = false ;
bss_desc->cap_info_bitmap &= ~WLAN_CAPABILITY_SPECTRUM_MGMT;
}
}
/* This is DFS CAC work queue function.
* This delayed work emits CAC finished event for cfg80211 if
* CAC was started earlier .
*/
void mwifiex_dfs_cac_work_queue(struct work_struct *work)
{
struct cfg80211_chan_def chandef;
struct delayed_work *delayed_work = to_delayed_work(work);
struct mwifiex_private *priv =
container_of(delayed_work, struct mwifiex_private,
dfs_cac_work);
chandef = priv->dfs_chandef;
if (priv->wdev.links[0 ].cac_started) {
mwifiex_dbg(priv->adapter, MSG,
"CAC timer finished; No radar detected\n" );
cfg80211_cac_event(priv->netdev, &chandef,
NL80211_RADAR_CAC_FINISHED,
GFP_KERNEL, 0 );
}
}
/* This function prepares channel report request command to FW for
* starting radar detection .
*/
int mwifiex_cmd_issue_chan_report_request(struct mwifiex_private *priv,
struct host_cmd_ds_command *cmd,
void *data_buf)
{
struct host_cmd_ds_chan_rpt_req *cr_req = &cmd->params.chan_rpt_req;
struct mwifiex_radar_params *radar_params = (void *)data_buf;
cmd->command = cpu_to_le16(HostCmd_CMD_CHAN_REPORT_REQUEST);
cmd->size = cpu_to_le16(S_DS_GEN);
le16_unaligned_add_cpu(&cmd->size,
sizeof (struct host_cmd_ds_chan_rpt_req));
cr_req->chan_desc.start_freq = cpu_to_le16(MWIFIEX_A_BAND_START_FREQ);
cr_req->chan_desc.chan_num = radar_params->chandef->chan->hw_value;
cr_req->chan_desc.chan_width = radar_params->chandef->width;
cr_req->msec_dwell_time = cpu_to_le32(radar_params->cac_time_ms);
if (radar_params->cac_time_ms)
mwifiex_dbg(priv->adapter, MSG,
"11h: issuing DFS Radar check for channel=%d\n" ,
radar_params->chandef->chan->hw_value);
else
mwifiex_dbg(priv->adapter, MSG, "cancelling CAC\n" );
return 0 ;
}
int mwifiex_stop_radar_detection(struct mwifiex_private *priv,
struct cfg80211_chan_def *chandef)
{
struct mwifiex_radar_params radar_params;
memset(&radar_params, 0 , sizeof (struct mwifiex_radar_params));
radar_params.chandef = chandef;
radar_params.cac_time_ms = 0 ;
return mwifiex_send_cmd(priv, HostCmd_CMD_CHAN_REPORT_REQUEST,
HostCmd_ACT_GEN_SET, 0 , &radar_params, true );
}
/* This function is to abort ongoing CAC upon stopping AP operations
* or during unload .
*/
void mwifiex_abort_cac(struct mwifiex_private *priv)
{
if (priv->wdev.links[0 ].cac_started) {
if (mwifiex_stop_radar_detection(priv, &priv->dfs_chandef))
mwifiex_dbg(priv->adapter, ERROR,
"failed to stop CAC in FW\n" );
mwifiex_dbg(priv->adapter, MSG,
"Aborting delayed work for CAC.\n" );
cancel_delayed_work_sync(&priv->dfs_cac_work);
cfg80211_cac_event(priv->netdev, &priv->dfs_chandef,
NL80211_RADAR_CAC_ABORTED, GFP_KERNEL,
0 );
}
}
/* This function handles channel report event from FW during CAC period.
* If radar is detected during CAC , driver indicates the same to cfg80211
* and also cancels ongoing delayed work .
*/
int mwifiex_11h_handle_chanrpt_ready(struct mwifiex_private *priv,
struct sk_buff *skb)
{
struct host_cmd_ds_chan_rpt_event *rpt_event;
struct mwifiex_ie_types_chan_rpt_data *rpt;
u16 event_len, tlv_len;
rpt_event = (void *)(skb->data + sizeof (u32));
event_len = skb->len - (sizeof (struct host_cmd_ds_chan_rpt_event)+
sizeof (u32));
if (le32_to_cpu(rpt_event->result) != HostCmd_RESULT_OK) {
mwifiex_dbg(priv->adapter, ERROR,
"Error in channel report event\n" );
return -1 ;
}
while (event_len >= sizeof (struct mwifiex_ie_types_header)) {
rpt = (void *)&rpt_event->tlvbuf;
tlv_len = le16_to_cpu(rpt->header.len);
switch (le16_to_cpu(rpt->header.type)) {
case TLV_TYPE_CHANRPT_11H_BASIC:
if (rpt->map.radar) {
mwifiex_dbg(priv->adapter, MSG,
"RADAR Detected on channel %d!\n" ,
priv->dfs_chandef.chan->hw_value);
cancel_delayed_work_sync(&priv->dfs_cac_work);
cfg80211_cac_event(priv->netdev,
&priv->dfs_chandef,
NL80211_RADAR_DETECTED,
GFP_KERNEL, 0 );
}
break ;
default :
break ;
}
event_len -= (tlv_len + sizeof (rpt->header));
}
return 0 ;
}
/* Handler for radar detected event from FW.*/
int mwifiex_11h_handle_radar_detected(struct mwifiex_private *priv,
struct sk_buff *skb)
{
struct mwifiex_radar_det_event *rdr_event;
rdr_event = (void *)(skb->data + sizeof (u32));
mwifiex_dbg(priv->adapter, MSG,
"radar detected; indicating kernel\n" );
if (mwifiex_stop_radar_detection(priv, &priv->dfs_chandef))
mwifiex_dbg(priv->adapter, ERROR,
"Failed to stop CAC in FW\n" );
cfg80211_radar_event(priv->adapter->wiphy, &priv->dfs_chandef,
GFP_KERNEL);
mwifiex_dbg(priv->adapter, MSG, "regdomain: %d\n" ,
rdr_event->reg_domain);
mwifiex_dbg(priv->adapter, MSG, "radar detection type: %d\n" ,
rdr_event->det_type);
return 0 ;
}
/* This is work queue function for channel switch handling.
* This function takes care of updating new channel definitin to
* bss config structure , restart AP and indicate channel switch success
* to cfg80211 .
*/
void mwifiex_dfs_chan_sw_work_queue(struct work_struct *work)
{
struct mwifiex_uap_bss_param *bss_cfg;
struct delayed_work *delayed_work = to_delayed_work(work);
struct mwifiex_private *priv =
container_of(delayed_work, struct mwifiex_private,
dfs_chan_sw_work);
bss_cfg = &priv->bss_cfg;
if (!bss_cfg->beacon_period) {
mwifiex_dbg(priv->adapter, ERROR,
"channel switch: AP already stopped\n" );
return ;
}
mwifiex_uap_set_channel(priv, bss_cfg, priv->dfs_chandef);
if (mwifiex_config_start_uap(priv, bss_cfg)) {
mwifiex_dbg(priv->adapter, ERROR,
"Failed to start AP after channel switch\n" );
return ;
}
mwifiex_dbg(priv->adapter, MSG,
"indicating channel switch completion to kernel\n" );
wiphy_lock(priv->wdev.wiphy);
cfg80211_ch_switch_notify(priv->netdev, &priv->dfs_chandef, 0 );
wiphy_unlock(priv->wdev.wiphy);
}
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