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wifi: cfg80211: save power spectral density(psd) of regulatory rule 

6 GHz regulatory domains introduces Power Spectral Density (PSD).
The PSD value of the regulatory rule should be taken into effect
for the ieee80211_channels falling into that particular regulatory
rule. Save the values in the channel which has PSD value and add
nl80211 attributes accordingly to handle it.

Co-developed-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
Signed-off-by: Wen Gong <quic_wgong@quicinc.com>
Link: https://lore.kernel.org/r/20230914082026.3709-1-quic_wgong@quicinc.com
[use hole in chan flags, reword docs]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Wen Gong 2023-09-14 04:20:26 -04:00 committed by Johannes Berg
parent 9c386911b1
commit ddd7f45c89
5 changed files with 41 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
include/net/cfg80211.h
View File

@ -76,6 +76,8 @@ struct wiphy;
* @IEEE80211_CHAN_DISABLED: This channel is disabled.
* @IEEE80211_CHAN_NO_IR: do not initiate radiation, this includes
* sending probe requests or beaconing.
* @IEEE80211_CHAN_PSD: Power spectral density (in dBm) is set for this
* channel.
* @IEEE80211_CHAN_RADAR: Radar detection is required on this channel.
* @IEEE80211_CHAN_NO_HT40PLUS: extension channel above this channel
* is not permitted.
@ -119,7 +121,7 @@ struct wiphy;
enum ieee80211_channel_flags {
IEEE80211_CHAN_DISABLED = 1<<0,
IEEE80211_CHAN_NO_IR = 1<<1,
/* hole at 1<<2 */
IEEE80211_CHAN_PSD = 1<<2,
IEEE80211_CHAN_RADAR = 1<<3,
IEEE80211_CHAN_NO_HT40PLUS = 1<<4,
IEEE80211_CHAN_NO_HT40MINUS = 1<<5,
@ -171,6 +173,7 @@ enum ieee80211_channel_flags {
* on this channel.
* @dfs_state_entered: timestamp (jiffies) when the dfs state was entered.
* @dfs_cac_ms: DFS CAC time in milliseconds, this is valid for DFS channels.
* @psd: power spectral density (in dBm)
*/
struct ieee80211_channel {
enum nl80211_band band;
@ -187,6 +190,7 @@ struct ieee80211_channel {
enum nl80211_dfs_state dfs_state;
unsigned long dfs_state_entered;
unsigned int dfs_cac_ms;
s8 psd;
};
/**

1
include/net/regulatory.h
View File

@ -213,6 +213,7 @@ struct ieee80211_reg_rule {
u32 flags;
u32 dfs_cac_ms;
bool has_wmm;
s8 psd;
};
struct ieee80211_regdomain {

9
include/uapi/linux/nl80211.h
View File

@ -4215,6 +4215,8 @@ enum nl80211_wmm_rule {
* as the primary or any of the secondary channels isn't possible
* @NL80211_FREQUENCY_ATTR_NO_EHT: EHT operation is not allowed on this channel
* in current regulatory domain.
* @NL80211_FREQUENCY_ATTR_PSD: Power spectral density (in dBm) that
* is allowed on this channel in current regulatory domain.
* @NL80211_FREQUENCY_ATTR_MAX: highest frequency attribute number
* currently defined
* @__NL80211_FREQUENCY_ATTR_AFTER_LAST: internal use
@ -4253,6 +4255,7 @@ enum nl80211_frequency_attr {
NL80211_FREQUENCY_ATTR_16MHZ,
NL80211_FREQUENCY_ATTR_NO_320MHZ,
NL80211_FREQUENCY_ATTR_NO_EHT,
NL80211_FREQUENCY_ATTR_PSD,
/* keep last */
__NL80211_FREQUENCY_ATTR_AFTER_LAST,
@ -4353,6 +4356,8 @@ enum nl80211_reg_type {
* a given frequency range. The value is in mBm (100 * dBm).
* @NL80211_ATTR_DFS_CAC_TIME: DFS CAC time in milliseconds.
* If not present or 0 default CAC time will be used.
* @NL80211_ATTR_POWER_RULE_PSD: power spectral density (in dBm).
* This could be negative.
* @NL80211_REG_RULE_ATTR_MAX: highest regulatory rule attribute number
* currently defined
* @__NL80211_REG_RULE_ATTR_AFTER_LAST: internal use
@ -4370,6 +4375,8 @@ enum nl80211_reg_rule_attr {
NL80211_ATTR_DFS_CAC_TIME,
NL80211_ATTR_POWER_RULE_PSD,
/* keep last */
__NL80211_REG_RULE_ATTR_AFTER_LAST,
NL80211_REG_RULE_ATTR_MAX = __NL80211_REG_RULE_ATTR_AFTER_LAST - 1
@ -4453,6 +4460,7 @@ enum nl80211_sched_scan_match_attr {
* @NL80211_RRF_NO_HE: HE operation not allowed
* @NL80211_RRF_NO_320MHZ: 320MHz operation not allowed
* @NL80211_RRF_NO_EHT: EHT operation not allowed
* @NL80211_RRF_PSD: Ruleset has power spectral density value
*/
enum nl80211_reg_rule_flags {
NL80211_RRF_NO_OFDM = 1<<0,
@ -4473,6 +4481,7 @@ enum nl80211_reg_rule_flags {
NL80211_RRF_NO_HE = 1<<17,
NL80211_RRF_NO_320MHZ = 1<<18,
NL80211_RRF_NO_EHT = 1<<19,
NL80211_RRF_PSD = 1<<20,
};
#define NL80211_RRF_PASSIVE_SCAN NL80211_RRF_NO_IR

9
net/wireless/nl80211.c
View File

@ -1115,6 +1115,10 @@ static int nl80211_msg_put_channel(struct sk_buff *msg, struct wiphy *wiphy,
if (nla_put_u32(msg, NL80211_FREQUENCY_ATTR_OFFSET, chan->freq_offset))
goto nla_put_failure;
if ((chan->flags & IEEE80211_CHAN_PSD) &&
nla_put_s8(msg, NL80211_FREQUENCY_ATTR_PSD, chan->psd))
goto nla_put_failure;
if ((chan->flags & IEEE80211_CHAN_DISABLED) &&
nla_put_flag(msg, NL80211_FREQUENCY_ATTR_DISABLED))
goto nla_put_failure;
@ -8529,6 +8533,11 @@ static int nl80211_put_regdom(const struct ieee80211_regdomain *regdom,
reg_rule->dfs_cac_ms))
goto nla_put_failure;
if ((reg_rule->flags & NL80211_RRF_PSD) &&
nla_put_s8(msg, NL80211_ATTR_POWER_RULE_PSD,
reg_rule->psd))
goto nla_put_failure;
nla_nest_end(msg, nl_reg_rule);
}

17
net/wireless/reg.c
View File

@ -1589,6 +1589,8 @@ static u32 map_regdom_flags(u32 rd_flags)
channel_flags |= IEEE80211_CHAN_NO_320MHZ;
if (rd_flags & NL80211_RRF_NO_EHT)
channel_flags |= IEEE80211_CHAN_NO_EHT;
if (rd_flags & NL80211_RRF_PSD)
channel_flags |= IEEE80211_CHAN_PSD;
return channel_flags;
}
@ -1795,6 +1797,9 @@ static void handle_channel_single_rule(struct wiphy *wiphy,
chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
}
if (chan->flags & IEEE80211_CHAN_PSD)
chan->psd = reg_rule->psd;
return;
}
@ -1815,6 +1820,9 @@ static void handle_channel_single_rule(struct wiphy *wiphy,
chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
}
if (chan->flags & IEEE80211_CHAN_PSD)
chan->psd = reg_rule->psd;
if (chan->orig_mpwr) {
/*
* Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
@ -1884,6 +1892,12 @@ static void handle_channel_adjacent_rules(struct wiphy *wiphy,
rrule2->dfs_cac_ms);
}
if ((rrule1->flags & NL80211_RRF_PSD) &&
(rrule2->flags & NL80211_RRF_PSD))
chan->psd = min_t(s8, rrule1->psd, rrule2->psd);
else
chan->flags &= ~NL80211_RRF_PSD;
return;
}
@ -2570,6 +2584,9 @@ static void handle_channel_custom(struct wiphy *wiphy,
chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
}
if (chan->flags & IEEE80211_CHAN_PSD)
chan->psd = reg_rule->psd;
chan->max_power = chan->max_reg_power;
}