From: Wen Gong <quic_wgong@xxxxxxxxxxx>
6 GHz regulatory domain 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.
Signed-off-by: Wen Gong <quic_wgong@xxxxxxxxxxx>
Co-developed-by: Aditya Kumar Singh <quic_adisi@xxxxxxxxxxx>
Signed-off-by: Aditya Kumar Singh <quic_adisi@xxxxxxxxxxx>
---
include/net/cfg80211.h | 5 +++++
include/net/regulatory.h | 1 +
include/uapi/linux/nl80211.h | 9 +++++++++
net/wireless/nl80211.c | 18 ++++++++++++++++++
net/wireless/reg.c | 17 +++++++++++++++++
5 files changed, 50 insertions(+)
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 140354f5f15b..600c080a280b 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -115,6 +115,8 @@ struct wiphy;
* This may be due to the driver or due to regulatory bandwidth
* restrictions.
* @IEEE80211_CHAN_NO_EHT: EHT operation is not permitted on this channel.
+ * @IEEE80211_CHAN_PSD: power spectral density (in dBm)
+ * on this channel
*/
enum ieee80211_channel_flags {
IEEE80211_CHAN_DISABLED = 1<<0,
@@ -138,6 +140,7 @@ enum ieee80211_channel_flags {
IEEE80211_CHAN_16MHZ = 1<<18,
IEEE80211_CHAN_NO_320MHZ = 1<<19,
IEEE80211_CHAN_NO_EHT = 1<<20,
+ IEEE80211_CHAN_PSD = 1<<21,
};
#define IEEE80211_CHAN_NO_HT40 \
@@ -171,6 +174,7 @@ 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 +191,7 @@ struct ieee80211_channel {
enum nl80211_dfs_state dfs_state;
unsigned long dfs_state_entered;
unsigned int dfs_cac_ms;
+ s8 psd;
};
/**
diff --git a/include/net/regulatory.h b/include/net/regulatory.h
index 47f06f6f5a67..ed20004fb6a9 100644
--- a/include/net/regulatory.h
+++ b/include/net/regulatory.h
@@ -221,6 +221,7 @@ struct ieee80211_reg_rule {
u32 flags;
u32 dfs_cac_ms;
bool has_wmm;
+ s8 psd;
};
struct ieee80211_regdomain {
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index 279f9715919e..8c21136ac18c 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -4062,6 +4062,8 @@ 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)
+ * 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
@@ -4100,6 +4102,7 @@ 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,
@@ -4200,6 +4203,8 @@ 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
@@ -4217,6 +4222,8 @@ 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
@@ -4299,6 +4306,7 @@ enum nl80211_sched_scan_match_attr {
* @NL80211_RRF_NO_160MHZ: 160MHz operation not allowed
* @NL80211_RRF_NO_HE: HE operation not allowed
* @NL80211_RRF_NO_320MHZ: 320MHz operation not allowed
+ * @NL80211_RRF_PSD: channel has power spectral density value
*/
enum nl80211_reg_rule_flags {
NL80211_RRF_NO_OFDM = 1<<0,
@@ -4318,6 +4326,7 @@ enum nl80211_reg_rule_flags {
NL80211_RRF_NO_160MHZ = 1<<16,
NL80211_RRF_NO_HE = 1<<17,
NL80211_RRF_NO_320MHZ = 1<<18,
+ NL80211_RRF_PSD = 1<<19,
};
#define NL80211_RRF_PASSIVE_SCAN NL80211_RRF_NO_IR
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index eda2ad029c90..afa8cd686e0e 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -1096,6 +1096,10 @@ 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;
@@ -8168,6 +8172,11 @@ 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);
}
@@ -8341,6 +8350,7 @@ static const struct nla_policy reg_rule_policy[NL80211_REG_RULE_ATTR_MAX + 1] =
[NL80211_ATTR_POWER_RULE_MAX_ANT_GAIN] = { .type = NLA_U32 },
[NL80211_ATTR_POWER_RULE_MAX_EIRP] = { .type = NLA_U32 },
[NL80211_ATTR_DFS_CAC_TIME] = { .type = NLA_U32 },
+ [NL80211_ATTR_POWER_RULE_PSD] = { .type = NLA_S8 },
};
static int parse_reg_rule(struct nlattr *tb[],
@@ -8362,6 +8372,14 @@ static int parse_reg_rule(struct nlattr *tb[],
reg_rule->flags = nla_get_u32(tb[NL80211_ATTR_REG_RULE_FLAGS]);
+ if (reg_rule->flags & NL80211_RRF_PSD) {
+ if (!tb[NL80211_ATTR_POWER_RULE_PSD])
+ return -EINVAL;
+
+ reg_rule->psd =
+ nla_get_s8(tb[NL80211_ATTR_POWER_RULE_PSD]);
+ }
+
freq_range->start_freq_khz =
nla_get_u32(tb[NL80211_ATTR_FREQ_RANGE_START]);
freq_range->end_freq_khz =
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index c7383ede794f..9a06aadba0d7 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -1619,6 +1619,8 @@ static u32 map_regdom_flags(u32 rd_flags)
channel_flags |= IEEE80211_CHAN_NO_HE;
if (rd_flags & NL80211_RRF_NO_320MHZ)
channel_flags |= IEEE80211_CHAN_NO_320MHZ;
+ if (rd_flags & NL80211_RRF_PSD)
+ channel_flags |= IEEE80211_CHAN_PSD;
return channel_flags;
}
@@ -1825,6 +1827,9 @@ 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;
}
@@ -1845,6 +1850,9 @@ 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
@@ -1914,6 +1922,12 @@ 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;
}
@@ -2600,6 +2614,9 @@ 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;
}
--
2.17.1
