[PATCH v4 0/6] cfg80211/mac80211: Add support for 6GHZ STA for various modes : LPI, SP and VLP

[PATCH v4 0/6] cfg80211/mac80211: Add support for 6GHZ STA for various modes : LPI, SP and VLP

[Wen Gong]

v4:
    1. rebased to top commit id 9e263e193af7 kernel/git/jberg/mac80211-next.git
    2. add NULL check for "mac80211: use ieee802_11_parse_elems() to find ies instead of ieee80211_bss_get_ie()"
    3. remove the 3 patches which already upstream:
       "mac80211: parse transmit power envelope element"
       "ieee80211: add definition for transmit power envelope element"
       "ieee80211: add definition of regulatory info in 6 GHz operation information"

v3: change per comments of Johannes.
    1. add patch "mac80211: use ieee802_11_parse_elems() to find ies instead of ieee80211_bss_get_ie()"
    2. move nl80211_ap_reg_power to ieee80211
    3. change some comments, length check, stack big size variable...

v2: change per comments of johannes.
    including code style, code logic, patch merge, commit log...

It introduced some new concept:
power type of AP(STANDARD_POWER_AP, INDOOR_AP, VERY_LOW_POWER_AP)
power type of STATION(DEFAULT_CLIENT, SUBORDINATE_CLIENT)
power spectral density(psd)

This patchset for cfg80211/mac80211 is to add the definition of new
concept of 6G and add basic parse of IE(transmit power envelope
element) in beacon and save power spectral density(psd) reported
by lower-driver for 6G channel, the info will be passed to lower
driver when connecting to 6G AP.

Wen Gong (6):
  mac80211: add power type definition for 6 GHz
  mac80211: add parse regulatory info in 6 GHz operation information
  cfg80211: add definition for 6 GHz power spectral density(psd)
  cfg80211: save power spectral density(psd) of regulatory rule
  mac80211: use ieee802_11_parse_elems() to find ies instead of
    ieee80211_bss_get_ie()
  mac80211: save transmit power envelope element and power constraint

 include/linux/ieee80211.h    | 34 +++++++++++++++
 include/net/cfg80211.h       |  5 +++
 include/net/mac80211.h       |  8 ++++
 include/net/regulatory.h     |  1 +
 include/uapi/linux/nl80211.h |  2 +
 net/mac80211/mlme.c          | 82 +++++++++++++++++++++++++++++-------
 net/mac80211/util.c          | 13 ++++++
 net/wireless/reg.c           | 17 ++++++++
 8 files changed, 146 insertions(+), 16 deletions(-)


base-commit: 9e263e193af73d2509dc3102a680a11130f44e20
-- 
2.31.1


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[PATCH v4 0/6] cfg80211/mac80211: Add support for 6GHZ STA for various modes : LPI, SP and VLP

[Wen Gong]

v4:
    1. rebased to top commit id 9e263e193af7 kernel/git/jberg/mac80211-next.git
    2. add NULL check for "mac80211: use ieee802_11_parse_elems() to find ies instead of ieee80211_bss_get_ie()"
    3. remove the 3 patches which already upstream:
       "mac80211: parse transmit power envelope element"
       "ieee80211: add definition for transmit power envelope element"
       "ieee80211: add definition of regulatory info in 6 GHz operation information"

v3: change per comments of Johannes.
    1. add patch "mac80211: use ieee802_11_parse_elems() to find ies instead of ieee80211_bss_get_ie()"
    2. move nl80211_ap_reg_power to ieee80211
    3. change some comments, length check, stack big size variable...

v2: change per comments of johannes.
    including code style, code logic, patch merge, commit log...

It introduced some new concept:
power type of AP(STANDARD_POWER_AP, INDOOR_AP, VERY_LOW_POWER_AP)
power type of STATION(DEFAULT_CLIENT, SUBORDINATE_CLIENT)
power spectral density(psd)

This patchset for cfg80211/mac80211 is to add the definition of new
concept of 6G and add basic parse of IE(transmit power envelope
element) in beacon and save power spectral density(psd) reported
by lower-driver for 6G channel, the info will be passed to lower
driver when connecting to 6G AP.

Wen Gong (6):
  mac80211: add power type definition for 6 GHz
  mac80211: add parse regulatory info in 6 GHz operation information
  cfg80211: add definition for 6 GHz power spectral density(psd)
  cfg80211: save power spectral density(psd) of regulatory rule
  mac80211: use ieee802_11_parse_elems() to find ies instead of
    ieee80211_bss_get_ie()
  mac80211: save transmit power envelope element and power constraint

 include/linux/ieee80211.h    | 34 +++++++++++++++
 include/net/cfg80211.h       |  5 +++
 include/net/mac80211.h       |  8 ++++
 include/net/regulatory.h     |  1 +
 include/uapi/linux/nl80211.h |  2 +
 net/mac80211/mlme.c          | 82 +++++++++++++++++++++++++++++-------
 net/mac80211/util.c          | 13 ++++++
 net/wireless/reg.c           | 17 ++++++++
 8 files changed, 146 insertions(+), 16 deletions(-)


base-commit: 9e263e193af73d2509dc3102a680a11130f44e20
-- 
2.31.1

[PATCH v4 1/6] mac80211: add power type definition for 6 GHz

[Wen Gong]

6 GHz regulatory domains introduces different modes for 6 GHz AP
operations Low Power Indoor(LPI), Standard Power(SP) and Very Low
Power(VLP). 6 GHz STAs could be operated as either Regular or
Subordinate clients. This patch is define the flags for power type
of AP and STATION mode.

Signed-off-by: Wen Gong <wgong@codeaurora.org>
---
 include/linux/ieee80211.h | 34 ++++++++++++++++++++++++++++++++++
 include/net/mac80211.h    |  2 ++
 2 files changed, 36 insertions(+)

diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index 694264503119..1e2d7f25d4f9 100644
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -1988,6 +1988,40 @@ int ieee80211_get_vht_max_nss(struct ieee80211_vht_cap *cap,
 			      int mcs, bool ext_nss_bw_capable,
 			      unsigned int max_vht_nss);
 
+/**
+ * enum ieee80211_ap_reg_power - regulatory power for a Access Point
+ *
+ * @IEEE80211_REG_UNSET_AP: Access Point has no regulatory power mode
+ * @IEEE80211_REG_LPI: Indoor Access Point
+ * @IEEE80211_REG_SP: Standard power Access Point
+ * @IEEE80211_REG_VLP: Very low power Access Point
+ */
+enum ieee80211_ap_reg_power {
+	IEEE80211_REG_UNSET_AP,
+	IEEE80211_REG_LPI_AP,
+	IEEE80211_REG_SP_AP,
+	IEEE80211_REG_VLP_AP,
+	IEEE80211_REG_AP_POWER_AFTER_LAST,
+	IEEE80211_REG_AP_POWER_MAX =
+		IEEE80211_REG_AP_POWER_AFTER_LAST - 1,
+};
+
+/**
+ * enum ieee80211_client_reg_power - regulatory power for a client
+ *
+ * @IEEE80211_REG_UNSET_CLIENT: Client has no regulatory power mode
+ * @IEEE80211_REG_DEFAULT_CLIENT: Default Client
+ * @IEEE80211_REG_SUBORDINATE_CLIENT: Subordinate Client
+ */
+enum ieee80211_client_reg_power {
+	IEEE80211_REG_UNSET_CLIENT,
+	IEEE80211_REG_DEFAULT_CLIENT,
+	IEEE80211_REG_SUBORDINATE_CLIENT,
+	IEEE80211_REG_CLIENT_POWER_AFTER_LAST,
+	IEEE80211_REG_CLIENT_POWER_MAX =
+		IEEE80211_REG_CLIENT_POWER_AFTER_LAST - 1,
+};
+
 /* 802.11ax HE MAC capabilities */
 #define IEEE80211_HE_MAC_CAP0_HTC_HE				0x01
 #define IEEE80211_HE_MAC_CAP0_TWT_REQ				0x02
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index af0fc13cea34..8923a9fc4126 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -632,6 +632,7 @@ struct ieee80211_fils_discovery {
  * @s1g: BSS is S1G BSS (affects Association Request format).
  * @beacon_tx_rate: The configured beacon transmit rate that needs to be passed
  *	to driver when rate control is offloaded to firmware.
+ * @power_type: power type of BSS for 6 GHz
  */
 struct ieee80211_bss_conf {
 	const u8 *bssid;
@@ -702,6 +703,7 @@ struct ieee80211_bss_conf {
 	u32 unsol_bcast_probe_resp_interval;
 	bool s1g;
 	struct cfg80211_bitrate_mask beacon_tx_rate;
+	enum ieee80211_ap_reg_power power_type;
 };
 
 /**
-- 
2.31.1

[PATCH v4 1/6] mac80211: add power type definition for 6 GHz

[Wen Gong]

6 GHz regulatory domains introduces different modes for 6 GHz AP
operations Low Power Indoor(LPI), Standard Power(SP) and Very Low
Power(VLP). 6 GHz STAs could be operated as either Regular or
Subordinate clients. This patch is define the flags for power type
of AP and STATION mode.

Signed-off-by: Wen Gong <wgong@codeaurora.org>
---
 include/linux/ieee80211.h | 34 ++++++++++++++++++++++++++++++++++
 include/net/mac80211.h    |  2 ++
 2 files changed, 36 insertions(+)

diff --git a/include/linux/ieee80211.h b/include/linux/ieee80211.h
index 694264503119..1e2d7f25d4f9 100644
--- a/include/linux/ieee80211.h
+++ b/include/linux/ieee80211.h
@@ -1988,6 +1988,40 @@ int ieee80211_get_vht_max_nss(struct ieee80211_vht_cap *cap,
 			      int mcs, bool ext_nss_bw_capable,
 			      unsigned int max_vht_nss);
 
+/**
+ * enum ieee80211_ap_reg_power - regulatory power for a Access Point
+ *
+ * @IEEE80211_REG_UNSET_AP: Access Point has no regulatory power mode
+ * @IEEE80211_REG_LPI: Indoor Access Point
+ * @IEEE80211_REG_SP: Standard power Access Point
+ * @IEEE80211_REG_VLP: Very low power Access Point
+ */
+enum ieee80211_ap_reg_power {
+	IEEE80211_REG_UNSET_AP,
+	IEEE80211_REG_LPI_AP,
+	IEEE80211_REG_SP_AP,
+	IEEE80211_REG_VLP_AP,
+	IEEE80211_REG_AP_POWER_AFTER_LAST,
+	IEEE80211_REG_AP_POWER_MAX =
+		IEEE80211_REG_AP_POWER_AFTER_LAST - 1,
+};
+
+/**
+ * enum ieee80211_client_reg_power - regulatory power for a client
+ *
+ * @IEEE80211_REG_UNSET_CLIENT: Client has no regulatory power mode
+ * @IEEE80211_REG_DEFAULT_CLIENT: Default Client
+ * @IEEE80211_REG_SUBORDINATE_CLIENT: Subordinate Client
+ */
+enum ieee80211_client_reg_power {
+	IEEE80211_REG_UNSET_CLIENT,
+	IEEE80211_REG_DEFAULT_CLIENT,
+	IEEE80211_REG_SUBORDINATE_CLIENT,
+	IEEE80211_REG_CLIENT_POWER_AFTER_LAST,
+	IEEE80211_REG_CLIENT_POWER_MAX =
+		IEEE80211_REG_CLIENT_POWER_AFTER_LAST - 1,
+};
+
 /* 802.11ax HE MAC capabilities */
 #define IEEE80211_HE_MAC_CAP0_HTC_HE				0x01
 #define IEEE80211_HE_MAC_CAP0_TWT_REQ				0x02
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index af0fc13cea34..8923a9fc4126 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -632,6 +632,7 @@ struct ieee80211_fils_discovery {
  * @s1g: BSS is S1G BSS (affects Association Request format).
  * @beacon_tx_rate: The configured beacon transmit rate that needs to be passed
  *	to driver when rate control is offloaded to firmware.
+ * @power_type: power type of BSS for 6 GHz
  */
 struct ieee80211_bss_conf {
 	const u8 *bssid;
@@ -702,6 +703,7 @@ struct ieee80211_bss_conf {
 	u32 unsol_bcast_probe_resp_interval;
 	bool s1g;
 	struct cfg80211_bitrate_mask beacon_tx_rate;
+	enum ieee80211_ap_reg_power power_type;
 };
 
 /**
-- 
2.31.1


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[PATCH v4 2/6] mac80211: add parse regulatory info in 6 GHz operation information

[Wen Gong]

This patch is to convert the regulatory info subfield in HE operation
element to power type and save in struct cfg80211_chan_def.

Signed-off-by: Wen Gong <wgong@codeaurora.org>
---
 net/mac80211/util.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index ca8008ba9b1f..66e48f29495a 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -3385,6 +3385,7 @@ bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
 	const struct ieee80211_sta_he_cap *he_cap;
 	struct cfg80211_chan_def he_chandef = *chandef;
 	const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
+	struct ieee80211_bss_conf *bss_conf;
 	bool support_80_80, support_160;
 	u8 he_phy_cap;
 	u32 freq;
@@ -3428,6 +3429,18 @@ bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
 					      NL80211_BAND_6GHZ);
 	he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
 
+	bss_conf = &sdata->vif.bss_conf;
+
+	switch (u8_get_bits(he_6ghz_oper->control,
+			    IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) {
+	case IEEE80211_6GHZ_CTRL_REG_LPI_AP:
+		bss_conf->power_type = IEEE80211_REG_LPI_AP;
+		break;
+	case IEEE80211_6GHZ_CTRL_REG_SP_AP:
+		bss_conf->power_type = IEEE80211_REG_SP_AP;
+		break;
+	}
+
 	switch (u8_get_bits(he_6ghz_oper->control,
 			    IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
 	case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
-- 
2.31.1


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[PATCH v4 2/6] mac80211: add parse regulatory info in 6 GHz operation information

[Wen Gong]

This patch is to convert the regulatory info subfield in HE operation
element to power type and save in struct cfg80211_chan_def.

Signed-off-by: Wen Gong <wgong@codeaurora.org>
---
 net/mac80211/util.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index ca8008ba9b1f..66e48f29495a 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -3385,6 +3385,7 @@ bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
 	const struct ieee80211_sta_he_cap *he_cap;
 	struct cfg80211_chan_def he_chandef = *chandef;
 	const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
+	struct ieee80211_bss_conf *bss_conf;
 	bool support_80_80, support_160;
 	u8 he_phy_cap;
 	u32 freq;
@@ -3428,6 +3429,18 @@ bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
 					      NL80211_BAND_6GHZ);
 	he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
 
+	bss_conf = &sdata->vif.bss_conf;
+
+	switch (u8_get_bits(he_6ghz_oper->control,
+			    IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) {
+	case IEEE80211_6GHZ_CTRL_REG_LPI_AP:
+		bss_conf->power_type = IEEE80211_REG_LPI_AP;
+		break;
+	case IEEE80211_6GHZ_CTRL_REG_SP_AP:
+		bss_conf->power_type = IEEE80211_REG_SP_AP;
+		break;
+	}
+
 	switch (u8_get_bits(he_6ghz_oper->control,
 			    IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
 	case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
-- 
2.31.1

Re: [PATCH v4 2/6] mac80211: add parse regulatory info in 6 GHz operation information

[Johannes Berg]

On Fri, 2021-09-24 at 06:00 -0400, Wen Gong wrote:
> This patch is to convert the regulatory info subfield in HE operation
> element to power type and save in struct cfg80211_chan_def.
> 
> Signed-off-by: Wen Gong <wgong@codeaurora.org>
> ---
>  net/mac80211/util.c | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/net/mac80211/util.c b/net/mac80211/util.c
> index ca8008ba9b1f..66e48f29495a 100644
> --- a/net/mac80211/util.c
> +++ b/net/mac80211/util.c
> @@ -3385,6 +3385,7 @@ bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
>  	const struct ieee80211_sta_he_cap *he_cap;
>  	struct cfg80211_chan_def he_chandef = *chandef;
>  	const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
> +	struct ieee80211_bss_conf *bss_conf;
>  	bool support_80_80, support_160;
>  	u8 he_phy_cap;
>  	u32 freq;
> @@ -3428,6 +3429,18 @@ bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
>  					      NL80211_BAND_6GHZ);
>  	he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
>  
> 
> 
> 
> +	bss_conf = &sdata->vif.bss_conf;
> +
> +	switch (u8_get_bits(he_6ghz_oper->control,
> +			    IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) {
> +	case IEEE80211_6GHZ_CTRL_REG_LPI_AP:
> +		bss_conf->power_type = IEEE80211_REG_LPI_AP;
> +		break;
> +	case IEEE80211_6GHZ_CTRL_REG_SP_AP:
> +		bss_conf->power_type = IEEE80211_REG_SP_AP;
> +		break;
> +	}

I added a default case here to set it to UNSET, so that if you
disconnect and reconnect etc. you don't get stale data.

johannes

Re: [PATCH v4 2/6] mac80211: add parse regulatory info in 6 GHz operation information

[Johannes Berg]

On Fri, 2021-09-24 at 06:00 -0400, Wen Gong wrote:
> This patch is to convert the regulatory info subfield in HE operation
> element to power type and save in struct cfg80211_chan_def.
> 
> Signed-off-by: Wen Gong <wgong@codeaurora.org>
> ---
>  net/mac80211/util.c | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/net/mac80211/util.c b/net/mac80211/util.c
> index ca8008ba9b1f..66e48f29495a 100644
> --- a/net/mac80211/util.c
> +++ b/net/mac80211/util.c
> @@ -3385,6 +3385,7 @@ bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
>  	const struct ieee80211_sta_he_cap *he_cap;
>  	struct cfg80211_chan_def he_chandef = *chandef;
>  	const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
> +	struct ieee80211_bss_conf *bss_conf;
>  	bool support_80_80, support_160;
>  	u8 he_phy_cap;
>  	u32 freq;
> @@ -3428,6 +3429,18 @@ bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
>  					      NL80211_BAND_6GHZ);
>  	he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
>  
> 
> 
> 
> +	bss_conf = &sdata->vif.bss_conf;
> +
> +	switch (u8_get_bits(he_6ghz_oper->control,
> +			    IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) {
> +	case IEEE80211_6GHZ_CTRL_REG_LPI_AP:
> +		bss_conf->power_type = IEEE80211_REG_LPI_AP;
> +		break;
> +	case IEEE80211_6GHZ_CTRL_REG_SP_AP:
> +		bss_conf->power_type = IEEE80211_REG_SP_AP;
> +		break;
> +	}

I added a default case here to set it to UNSET, so that if you
disconnect and reconnect etc. you don't get stale data.

johannes



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[PATCH v4 3/6] cfg80211: add definition for 6 GHz power spectral density(psd)

[Wen Gong]

6 GHz regulatory domains introduces power spectral density(psd). This
patch is define the flags for psd.

Signed-off-by: Wen Gong <wgong@codeaurora.org>
---
 include/net/cfg80211.h       | 5 +++++
 include/net/regulatory.h     | 1 +
 include/uapi/linux/nl80211.h | 2 ++
 3 files changed, 8 insertions(+)

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 62dd8422e0dc..f8e0cc19e0ce 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -109,6 +109,8 @@ struct wiphy;
  *	on this channel.
  * @IEEE80211_CHAN_16MHZ: 16 MHz bandwidth is permitted
  *	on this channel.
+ * @IEEE80211_CHAN_PSD: power spectral density (in dBm)
+ *	on this channel.
  *
  */
 enum ieee80211_channel_flags {
@@ -131,6 +133,7 @@ enum ieee80211_channel_flags {
 	IEEE80211_CHAN_4MHZ		= 1<<16,
 	IEEE80211_CHAN_8MHZ		= 1<<17,
 	IEEE80211_CHAN_16MHZ		= 1<<18,
+	IEEE80211_CHAN_PSD		= 1<<19,
 };
 
 #define IEEE80211_CHAN_NO_HT40 \
@@ -164,6 +167,7 @@ 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;
@@ -180,6 +184,7 @@ 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 c2efea98e060..2ca8fa06f536 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -4085,6 +4085,7 @@ enum nl80211_sched_scan_match_attr {
  * @NL80211_RRF_NO_80MHZ: 80MHz operation not allowed
  * @NL80211_RRF_NO_160MHZ: 160MHz operation not allowed
  * @NL80211_RRF_NO_HE: HE operation not allowed
+ * @NL80211_RRF_PSD: channels has power spectral density value
  */
 enum nl80211_reg_rule_flags {
 	NL80211_RRF_NO_OFDM		= 1<<0,
@@ -4103,6 +4104,7 @@ enum nl80211_reg_rule_flags {
 	NL80211_RRF_NO_80MHZ		= 1<<15,
 	NL80211_RRF_NO_160MHZ		= 1<<16,
 	NL80211_RRF_NO_HE		= 1<<17,
+	NL80211_RRF_PSD		= 1<<18,
 };
 
 #define NL80211_RRF_PASSIVE_SCAN	NL80211_RRF_NO_IR
-- 
2.31.1

[PATCH v4 3/6] cfg80211: add definition for 6 GHz power spectral density(psd)

[Wen Gong]

6 GHz regulatory domains introduces power spectral density(psd). This
patch is define the flags for psd.

Signed-off-by: Wen Gong <wgong@codeaurora.org>
---
 include/net/cfg80211.h       | 5 +++++
 include/net/regulatory.h     | 1 +
 include/uapi/linux/nl80211.h | 2 ++
 3 files changed, 8 insertions(+)

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 62dd8422e0dc..f8e0cc19e0ce 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -109,6 +109,8 @@ struct wiphy;
  *	on this channel.
  * @IEEE80211_CHAN_16MHZ: 16 MHz bandwidth is permitted
  *	on this channel.
+ * @IEEE80211_CHAN_PSD: power spectral density (in dBm)
+ *	on this channel.
  *
  */
 enum ieee80211_channel_flags {
@@ -131,6 +133,7 @@ enum ieee80211_channel_flags {
 	IEEE80211_CHAN_4MHZ		= 1<<16,
 	IEEE80211_CHAN_8MHZ		= 1<<17,
 	IEEE80211_CHAN_16MHZ		= 1<<18,
+	IEEE80211_CHAN_PSD		= 1<<19,
 };
 
 #define IEEE80211_CHAN_NO_HT40 \
@@ -164,6 +167,7 @@ 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;
@@ -180,6 +184,7 @@ 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 c2efea98e060..2ca8fa06f536 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -4085,6 +4085,7 @@ enum nl80211_sched_scan_match_attr {
  * @NL80211_RRF_NO_80MHZ: 80MHz operation not allowed
  * @NL80211_RRF_NO_160MHZ: 160MHz operation not allowed
  * @NL80211_RRF_NO_HE: HE operation not allowed
+ * @NL80211_RRF_PSD: channels has power spectral density value
  */
 enum nl80211_reg_rule_flags {
 	NL80211_RRF_NO_OFDM		= 1<<0,
@@ -4103,6 +4104,7 @@ enum nl80211_reg_rule_flags {
 	NL80211_RRF_NO_80MHZ		= 1<<15,
 	NL80211_RRF_NO_160MHZ		= 1<<16,
 	NL80211_RRF_NO_HE		= 1<<17,
+	NL80211_RRF_PSD		= 1<<18,
 };
 
 #define NL80211_RRF_PASSIVE_SCAN	NL80211_RRF_NO_IR
-- 
2.31.1


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Re: [PATCH v4 3/6] cfg80211: add definition for 6 GHz power spectral density(psd)

[Johannes Berg]

On Fri, 2021-09-24 at 06:00 -0400, Wen Gong wrote:
> 
>  	NL80211_RRF_NO_80MHZ		= 1<<15,
>  	NL80211_RRF_NO_160MHZ		= 1<<16,
>  	NL80211_RRF_NO_HE		= 1<<17,
> +	NL80211_RRF_PSD		= 1<<18,

Indentation seems to be missing a tab here.

johannes

Re: [PATCH v4 3/6] cfg80211: add definition for 6 GHz power spectral density(psd)

[Johannes Berg]

On Fri, 2021-09-24 at 06:00 -0400, Wen Gong wrote:
> 
>  	NL80211_RRF_NO_80MHZ		= 1<<15,
>  	NL80211_RRF_NO_160MHZ		= 1<<16,
>  	NL80211_RRF_NO_HE		= 1<<17,
> +	NL80211_RRF_PSD		= 1<<18,

Indentation seems to be missing a tab here.

johannes


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[PATCH v4 4/6] cfg80211: save power spectral density(psd) of regulatory rule

[Wen Gong]

The power spectral density(psd) of regulatory rule should be take
effect to the channels. This patch is to save the values to the
channel which has psd value.

Signed-off-by: Wen Gong <wgong@codeaurora.org>
---
 net/wireless/reg.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index df87c7f3a049..8f765befb9bc 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -1590,6 +1590,8 @@ static u32 map_regdom_flags(u32 rd_flags)
 		channel_flags |= IEEE80211_CHAN_NO_160MHZ;
 	if (rd_flags & NL80211_RRF_NO_HE)
 		channel_flags |= IEEE80211_CHAN_NO_HE;
+	if (rd_flags & NL80211_RRF_PSD)
+		channel_flags |= IEEE80211_CHAN_PSD;
 	return channel_flags;
 }
 
@@ -1794,6 +1796,9 @@ 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;
 	}
 
@@ -1814,6 +1819,9 @@ 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
@@ -1883,6 +1891,12 @@ 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;
 	}
 
@@ -2540,6 +2554,9 @@ 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;
 }
 
-- 
2.31.1


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[PATCH v4 4/6] cfg80211: save power spectral density(psd) of regulatory rule

[Wen Gong]

The power spectral density(psd) of regulatory rule should be take
effect to the channels. This patch is to save the values to the
channel which has psd value.

Signed-off-by: Wen Gong <wgong@codeaurora.org>
---
 net/wireless/reg.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index df87c7f3a049..8f765befb9bc 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -1590,6 +1590,8 @@ static u32 map_regdom_flags(u32 rd_flags)
 		channel_flags |= IEEE80211_CHAN_NO_160MHZ;
 	if (rd_flags & NL80211_RRF_NO_HE)
 		channel_flags |= IEEE80211_CHAN_NO_HE;
+	if (rd_flags & NL80211_RRF_PSD)
+		channel_flags |= IEEE80211_CHAN_PSD;
 	return channel_flags;
 }
 
@@ -1794,6 +1796,9 @@ 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;
 	}
 
@@ -1814,6 +1819,9 @@ 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
@@ -1883,6 +1891,12 @@ 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;
 	}
 
@@ -2540,6 +2554,9 @@ 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;
 }
 
-- 
2.31.1

Re: [PATCH v4 4/6] cfg80211: save power spectral density(psd) of regulatory rule

[Johannes Berg]

On Fri, 2021-09-24 at 06:00 -0400, Wen Gong wrote:
> The power spectral density(psd) of regulatory rule should be take
> effect to the channels. This patch is to save the values to the
> channel which has psd value.
> 
> Signed-off-by: Wen Gong <wgong@codeaurora.org>
> ---
>  net/wireless/reg.c | 17 +++++++++++++++++
>  1 file changed, 17 insertions(+)
> 
> diff --git a/net/wireless/reg.c b/net/wireless/reg.c
> index df87c7f3a049..8f765befb9bc 100644
> --- a/net/wireless/reg.c
> +++ b/net/wireless/reg.c
> @@ -1590,6 +1590,8 @@ static u32 map_regdom_flags(u32 rd_flags)
>  		channel_flags |= IEEE80211_CHAN_NO_160MHZ;
>  	if (rd_flags & NL80211_RRF_NO_HE)
>  		channel_flags |= IEEE80211_CHAN_NO_HE;
> +	if (rd_flags & NL80211_RRF_PSD)
> +		channel_flags |= IEEE80211_CHAN_PSD;

I went to go squash this with patch 3 and took a closer look, and then I
realized you're doing this weird.

Please when you resend also squash this - it's a bit weird to read in
two patches.

However, I think this is missing a lot of things - we already talked
about the regulatory database, and while that'd be nice, I guess I
conceded that you don't really have to do it now.

However, for visibility reasons, I *really* think you need to add
nl80211 attributes for all of this data - when the regdomain is dumped
in nl80211_put_regdom() you would have the flag now (it dumps the value
of reg_rule->flags in NL80211_ATTR_REG_RULE_FLAGS), but you didn't add
the value of reg_rule->psd which you've added.

Similarly, you're not adding the PSD flag nor the PSD value for the
*channel* in nl80211_msg_put_channel(), both of which I think you should
have for visibility into what's going on in the kernel/driver.

I've applied all the other patches, so please just resend 3 and 4,
squashed into a single patch, with the fixes.

johannes

Re: [PATCH v4 4/6] cfg80211: save power spectral density(psd) of regulatory rule

[Johannes Berg]

On Fri, 2021-09-24 at 06:00 -0400, Wen Gong wrote:
> The power spectral density(psd) of regulatory rule should be take
> effect to the channels. This patch is to save the values to the
> channel which has psd value.
> 
> Signed-off-by: Wen Gong <wgong@codeaurora.org>
> ---
>  net/wireless/reg.c | 17 +++++++++++++++++
>  1 file changed, 17 insertions(+)
> 
> diff --git a/net/wireless/reg.c b/net/wireless/reg.c
> index df87c7f3a049..8f765befb9bc 100644
> --- a/net/wireless/reg.c
> +++ b/net/wireless/reg.c
> @@ -1590,6 +1590,8 @@ static u32 map_regdom_flags(u32 rd_flags)
>  		channel_flags |= IEEE80211_CHAN_NO_160MHZ;
>  	if (rd_flags & NL80211_RRF_NO_HE)
>  		channel_flags |= IEEE80211_CHAN_NO_HE;
> +	if (rd_flags & NL80211_RRF_PSD)
> +		channel_flags |= IEEE80211_CHAN_PSD;

I went to go squash this with patch 3 and took a closer look, and then I
realized you're doing this weird.

Please when you resend also squash this - it's a bit weird to read in
two patches.

However, I think this is missing a lot of things - we already talked
about the regulatory database, and while that'd be nice, I guess I
conceded that you don't really have to do it now.

However, for visibility reasons, I *really* think you need to add
nl80211 attributes for all of this data - when the regdomain is dumped
in nl80211_put_regdom() you would have the flag now (it dumps the value
of reg_rule->flags in NL80211_ATTR_REG_RULE_FLAGS), but you didn't add
the value of reg_rule->psd which you've added.

Similarly, you're not adding the PSD flag nor the PSD value for the
*channel* in nl80211_msg_put_channel(), both of which I think you should
have for visibility into what's going on in the kernel/driver.

I've applied all the other patches, so please just resend 3 and 4,
squashed into a single patch, with the fixes.

johannes


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Re: [PATCH v4 4/6] cfg80211: save power spectral density(psd) of regulatory rule

[Wen Gong]

On 2021-09-27 19:27, Johannes Berg wrote:
> On Fri, 2021-09-24 at 06:00 -0400, Wen Gong wrote:
>> The power spectral density(psd) of regulatory rule should be take
>> effect to the channels. This patch is to save the values to the
>> channel which has psd value.
>> 
>> Signed-off-by: Wen Gong <wgong@codeaurora.org>
>> ---
>>  net/wireless/reg.c | 17 +++++++++++++++++
>>  1 file changed, 17 insertions(+)
>> 
>> diff --git a/net/wireless/reg.c b/net/wireless/reg.c
>> index df87c7f3a049..8f765befb9bc 100644
>> --- a/net/wireless/reg.c
>> +++ b/net/wireless/reg.c
>> @@ -1590,6 +1590,8 @@ static u32 map_regdom_flags(u32 rd_flags)
>>  		channel_flags |= IEEE80211_CHAN_NO_160MHZ;
>>  	if (rd_flags & NL80211_RRF_NO_HE)
>>  		channel_flags |= IEEE80211_CHAN_NO_HE;
>> +	if (rd_flags & NL80211_RRF_PSD)
>> +		channel_flags |= IEEE80211_CHAN_PSD;
> 
> I went to go squash this with patch 3 and took a closer look, and then 
> I
> realized you're doing this weird.
> 
> Please when you resend also squash this - it's a bit weird to read in
> two patches.
> 
> However, I think this is missing a lot of things - we already talked
> about the regulatory database, and while that'd be nice, I guess I
> conceded that you don't really have to do it now.
> 
> However, for visibility reasons, I *really* think you need to add
> nl80211 attributes for all of this data - when the regdomain is dumped
> in nl80211_put_regdom() you would have the flag now (it dumps the value
> of reg_rule->flags in NL80211_ATTR_REG_RULE_FLAGS), but you didn't add
> the value of reg_rule->psd which you've added.
> 
> Similarly, you're not adding the PSD flag nor the PSD value for the
> *channel* in nl80211_msg_put_channel(), both of which I think you 
> should
> have for visibility into what's going on in the kernel/driver.
> 
> I've applied all the other patches, so please just resend 3 and 4,
> squashed into a single patch, with the fixes.
> 

Thanks

I have sent "[PATCH v5] cfg80211: save power spectral density(psd) of 
regulatory rule"
for this.

> johannes

Re: [PATCH v4 4/6] cfg80211: save power spectral density(psd) of regulatory rule

[Wen Gong]

On 2021-09-27 19:27, Johannes Berg wrote:
> On Fri, 2021-09-24 at 06:00 -0400, Wen Gong wrote:
>> The power spectral density(psd) of regulatory rule should be take
>> effect to the channels. This patch is to save the values to the
>> channel which has psd value.
>> 
>> Signed-off-by: Wen Gong <wgong@codeaurora.org>
>> ---
>>  net/wireless/reg.c | 17 +++++++++++++++++
>>  1 file changed, 17 insertions(+)
>> 
>> diff --git a/net/wireless/reg.c b/net/wireless/reg.c
>> index df87c7f3a049..8f765befb9bc 100644
>> --- a/net/wireless/reg.c
>> +++ b/net/wireless/reg.c
>> @@ -1590,6 +1590,8 @@ static u32 map_regdom_flags(u32 rd_flags)
>>  		channel_flags |= IEEE80211_CHAN_NO_160MHZ;
>>  	if (rd_flags & NL80211_RRF_NO_HE)
>>  		channel_flags |= IEEE80211_CHAN_NO_HE;
>> +	if (rd_flags & NL80211_RRF_PSD)
>> +		channel_flags |= IEEE80211_CHAN_PSD;
> 
> I went to go squash this with patch 3 and took a closer look, and then 
> I
> realized you're doing this weird.
> 
> Please when you resend also squash this - it's a bit weird to read in
> two patches.
> 
> However, I think this is missing a lot of things - we already talked
> about the regulatory database, and while that'd be nice, I guess I
> conceded that you don't really have to do it now.
> 
> However, for visibility reasons, I *really* think you need to add
> nl80211 attributes for all of this data - when the regdomain is dumped
> in nl80211_put_regdom() you would have the flag now (it dumps the value
> of reg_rule->flags in NL80211_ATTR_REG_RULE_FLAGS), but you didn't add
> the value of reg_rule->psd which you've added.
> 
> Similarly, you're not adding the PSD flag nor the PSD value for the
> *channel* in nl80211_msg_put_channel(), both of which I think you 
> should
> have for visibility into what's going on in the kernel/driver.
> 
> I've applied all the other patches, so please just resend 3 and 4,
> squashed into a single patch, with the fixes.
> 

Thanks

I have sent "[PATCH v5] cfg80211: save power spectral density(psd) of 
regulatory rule"
for this.

> johannes

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[PATCH v4 5/6] mac80211: use ieee802_11_parse_elems() to find ies instead of ieee80211_bss_get_ie()

[Wen Gong]

In function ieee80211_prep_channel(), it has some ieee80211_bss_get_ie()
and cfg80211_find_ext_ie() to get the IE, this is to use another
function ieee802_11_parse_elems() to get all the IEs in one time.

Signed-off-by: Wen Gong <wgong@codeaurora.org>
---
 net/mac80211/mlme.c | 52 +++++++++++++++++++++++++++++++--------------
 1 file changed, 36 insertions(+), 16 deletions(-)

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index e80f3388b0c5..6e8e90ee8b6c 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -4998,10 +4998,22 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
 	bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
 	bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ;
 	struct ieee80211_bss *bss = (void *)cbss->priv;
+	struct ieee802_11_elems *elems;
+	const struct cfg80211_bss_ies *ies;
 	int ret;
 	u32 i;
 	bool have_80mhz;
 
+	rcu_read_lock();
+
+	ies = rcu_dereference(cbss->ies);
+	elems = ieee802_11_parse_elems(ies->data, ies->len, false,
+				       NULL, NULL);
+	if (!elems) {
+		rcu_read_unlock();
+		return -EINVAL;
+	}
+
 	sband = local->hw.wiphy->bands[cbss->channel->band];
 
 	ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
@@ -5024,16 +5036,18 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
 					 ieee80211_vif_type_p2p(&sdata->vif)))
 		ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
 
-	rcu_read_lock();
-
 	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && !is_6ghz) {
 		const u8 *ht_oper_ie, *ht_cap_ie;
 
-		ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
+		ht_oper_ie = elems->ht_operation ?
+			((const u8 *)elems->ht_operation) - 2 :
+			NULL;
 		if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
 			ht_oper = (void *)(ht_oper_ie + 2);
 
-		ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
+		ht_cap_ie = elems->ht_cap_elem ?
+			((const u8 *)elems->ht_cap_elem) - 2 :
+			NULL;
 		if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
 			ht_cap = (void *)(ht_cap_ie + 2);
 
@@ -5046,8 +5060,9 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
 	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && !is_6ghz) {
 		const u8 *vht_oper_ie, *vht_cap;
 
-		vht_oper_ie = ieee80211_bss_get_ie(cbss,
-						   WLAN_EID_VHT_OPERATION);
+		vht_oper_ie = elems->vht_operation ?
+			((const u8 *)elems->vht_operation) - 2 :
+			NULL;
 		if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
 			vht_oper = (void *)(vht_oper_ie + 2);
 		if (vht_oper && !ht_oper) {
@@ -5059,7 +5074,9 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
 			ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
 		}
 
-		vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
+		vht_cap = elems->vht_cap_elem ?
+			((const u8 *)elems->vht_cap_elem) - 2 :
+			NULL;
 		if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
 			ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 			vht_oper = NULL;
@@ -5067,12 +5084,11 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
 	}
 
 	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) {
-		const struct cfg80211_bss_ies *ies;
 		const u8 *he_oper_ie;
 
-		ies = rcu_dereference(cbss->ies);
-		he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION,
-						  ies->data, ies->len);
+		he_oper_ie = elems->he_operation ?
+			((const u8 *)elems->he_operation) - 3 :
+			NULL;
 		if (he_oper_ie &&
 		    he_oper_ie[1] >= ieee80211_he_oper_size(&he_oper_ie[3]))
 			he_oper = (void *)(he_oper_ie + 3);
@@ -5100,8 +5116,9 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
 	if (sband->band == NL80211_BAND_S1GHZ) {
 		const u8 *s1g_oper_ie;
 
-		s1g_oper_ie = ieee80211_bss_get_ie(cbss,
-						   WLAN_EID_S1G_OPERATION);
+		s1g_oper_ie = elems->s1g_oper ?
+			((const u8 *)elems->s1g_oper) - 2 :
+			NULL;
 		if (s1g_oper_ie && s1g_oper_ie[1] >= sizeof(*s1g_oper))
 			s1g_oper = (void *)(s1g_oper_ie + 2);
 		else
@@ -5123,7 +5140,8 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
 
 	if (ifmgd->flags & IEEE80211_STA_DISABLE_HE && is_6ghz) {
 		sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection");
-		return -EINVAL;
+		ret = -EINVAL;
+		goto out_no_lock;
 	}
 
 	/* will change later if needed */
@@ -5141,15 +5159,17 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
 	/* don't downgrade for 5 and 10 MHz channels, though. */
 	if (chandef.width == NL80211_CHAN_WIDTH_5 ||
 	    chandef.width == NL80211_CHAN_WIDTH_10)
-		goto out;
+		goto out_lock;
 
 	while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
 		ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
 		ret = ieee80211_vif_use_channel(sdata, &chandef,
 						IEEE80211_CHANCTX_SHARED);
 	}
- out:
+ out_lock:
 	mutex_unlock(&local->mtx);
+ out_no_lock:
+	kfree(elems);
 	return ret;
 }
 
-- 
2.31.1

[PATCH v4 5/6] mac80211: use ieee802_11_parse_elems() to find ies instead of ieee80211_bss_get_ie()

[Wen Gong]

In function ieee80211_prep_channel(), it has some ieee80211_bss_get_ie()
and cfg80211_find_ext_ie() to get the IE, this is to use another
function ieee802_11_parse_elems() to get all the IEs in one time.

Signed-off-by: Wen Gong <wgong@codeaurora.org>
---
 net/mac80211/mlme.c | 52 +++++++++++++++++++++++++++++++--------------
 1 file changed, 36 insertions(+), 16 deletions(-)

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index e80f3388b0c5..6e8e90ee8b6c 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -4998,10 +4998,22 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
 	bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ;
 	bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ;
 	struct ieee80211_bss *bss = (void *)cbss->priv;
+	struct ieee802_11_elems *elems;
+	const struct cfg80211_bss_ies *ies;
 	int ret;
 	u32 i;
 	bool have_80mhz;
 
+	rcu_read_lock();
+
+	ies = rcu_dereference(cbss->ies);
+	elems = ieee802_11_parse_elems(ies->data, ies->len, false,
+				       NULL, NULL);
+	if (!elems) {
+		rcu_read_unlock();
+		return -EINVAL;
+	}
+
 	sband = local->hw.wiphy->bands[cbss->channel->band];
 
 	ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
@@ -5024,16 +5036,18 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
 					 ieee80211_vif_type_p2p(&sdata->vif)))
 		ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
 
-	rcu_read_lock();
-
 	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && !is_6ghz) {
 		const u8 *ht_oper_ie, *ht_cap_ie;
 
-		ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
+		ht_oper_ie = elems->ht_operation ?
+			((const u8 *)elems->ht_operation) - 2 :
+			NULL;
 		if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
 			ht_oper = (void *)(ht_oper_ie + 2);
 
-		ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
+		ht_cap_ie = elems->ht_cap_elem ?
+			((const u8 *)elems->ht_cap_elem) - 2 :
+			NULL;
 		if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
 			ht_cap = (void *)(ht_cap_ie + 2);
 
@@ -5046,8 +5060,9 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
 	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && !is_6ghz) {
 		const u8 *vht_oper_ie, *vht_cap;
 
-		vht_oper_ie = ieee80211_bss_get_ie(cbss,
-						   WLAN_EID_VHT_OPERATION);
+		vht_oper_ie = elems->vht_operation ?
+			((const u8 *)elems->vht_operation) - 2 :
+			NULL;
 		if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
 			vht_oper = (void *)(vht_oper_ie + 2);
 		if (vht_oper && !ht_oper) {
@@ -5059,7 +5074,9 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
 			ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
 		}
 
-		vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
+		vht_cap = elems->vht_cap_elem ?
+			((const u8 *)elems->vht_cap_elem) - 2 :
+			NULL;
 		if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
 			ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
 			vht_oper = NULL;
@@ -5067,12 +5084,11 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
 	}
 
 	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HE)) {
-		const struct cfg80211_bss_ies *ies;
 		const u8 *he_oper_ie;
 
-		ies = rcu_dereference(cbss->ies);
-		he_oper_ie = cfg80211_find_ext_ie(WLAN_EID_EXT_HE_OPERATION,
-						  ies->data, ies->len);
+		he_oper_ie = elems->he_operation ?
+			((const u8 *)elems->he_operation) - 3 :
+			NULL;
 		if (he_oper_ie &&
 		    he_oper_ie[1] >= ieee80211_he_oper_size(&he_oper_ie[3]))
 			he_oper = (void *)(he_oper_ie + 3);
@@ -5100,8 +5116,9 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
 	if (sband->band == NL80211_BAND_S1GHZ) {
 		const u8 *s1g_oper_ie;
 
-		s1g_oper_ie = ieee80211_bss_get_ie(cbss,
-						   WLAN_EID_S1G_OPERATION);
+		s1g_oper_ie = elems->s1g_oper ?
+			((const u8 *)elems->s1g_oper) - 2 :
+			NULL;
 		if (s1g_oper_ie && s1g_oper_ie[1] >= sizeof(*s1g_oper))
 			s1g_oper = (void *)(s1g_oper_ie + 2);
 		else
@@ -5123,7 +5140,8 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
 
 	if (ifmgd->flags & IEEE80211_STA_DISABLE_HE && is_6ghz) {
 		sdata_info(sdata, "Rejecting non-HE 6/7 GHz connection");
-		return -EINVAL;
+		ret = -EINVAL;
+		goto out_no_lock;
 	}
 
 	/* will change later if needed */
@@ -5141,15 +5159,17 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
 	/* don't downgrade for 5 and 10 MHz channels, though. */
 	if (chandef.width == NL80211_CHAN_WIDTH_5 ||
 	    chandef.width == NL80211_CHAN_WIDTH_10)
-		goto out;
+		goto out_lock;
 
 	while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
 		ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
 		ret = ieee80211_vif_use_channel(sdata, &chandef,
 						IEEE80211_CHANCTX_SHARED);
 	}
- out:
+ out_lock:
 	mutex_unlock(&local->mtx);
+ out_no_lock:
+	kfree(elems);
 	return ret;
 }
 
-- 
2.31.1


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Re: [PATCH v4 5/6] mac80211: use ieee802_11_parse_elems() to find ies instead of ieee80211_bss_get_ie()

[Johannes Berg]

Taking a brief look before lunch,

>  	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && !is_6ghz) {
>  		const u8 *ht_oper_ie, *ht_cap_ie;
>  
> 
> 
> 
> -		ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
> +		ht_oper_ie = elems->ht_operation ?
> +			((const u8 *)elems->ht_operation) - 2 :
> +			NULL;
>  		if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
>  			ht_oper = (void *)(ht_oper_ie + 2);

Can't we drop these checks, and simply do

ht_oper = elems->ht_operation?

After all, ieee802_11_parse_elems() should already be doing the
necessary length checks? We just didn't have that with
ieee80211_bss_get_ie().

> -		ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
> +		ht_cap_ie = elems->ht_cap_elem ?
> +			((const u8 *)elems->ht_cap_elem) - 2 :
> +			NULL;
>  		if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
>  			ht_cap = (void *)(ht_cap_ie + 2);

Likewise for all the others.

johannes

Re: [PATCH v4 5/6] mac80211: use ieee802_11_parse_elems() to find ies instead of ieee80211_bss_get_ie()

[Johannes Berg]

Taking a brief look before lunch,

>  	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && !is_6ghz) {
>  		const u8 *ht_oper_ie, *ht_cap_ie;
>  
> 
> 
> 
> -		ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
> +		ht_oper_ie = elems->ht_operation ?
> +			((const u8 *)elems->ht_operation) - 2 :
> +			NULL;
>  		if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
>  			ht_oper = (void *)(ht_oper_ie + 2);

Can't we drop these checks, and simply do

ht_oper = elems->ht_operation?

After all, ieee802_11_parse_elems() should already be doing the
necessary length checks? We just didn't have that with
ieee80211_bss_get_ie().

> -		ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
> +		ht_cap_ie = elems->ht_cap_elem ?
> +			((const u8 *)elems->ht_cap_elem) - 2 :
> +			NULL;
>  		if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
>  			ht_cap = (void *)(ht_cap_ie + 2);

Likewise for all the others.

johannes


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Re: [PATCH v4 5/6] mac80211: use ieee802_11_parse_elems() to find ies instead of ieee80211_bss_get_ie()

[Johannes Berg]

On Fri, 2021-09-24 at 12:13 +0200, Johannes Berg wrote:
> Taking a brief look before lunch,
> 
> >  	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && !is_6ghz) {
> >  		const u8 *ht_oper_ie, *ht_cap_ie;
> >  
> > 
> > 
> > 
> > -		ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
> > +		ht_oper_ie = elems->ht_operation ?
> > +			((const u8 *)elems->ht_operation) - 2 :
> > +			NULL;
> >  		if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
> >  			ht_oper = (void *)(ht_oper_ie + 2);
> 
> Can't we drop these checks, and simply do
> 
> ht_oper = elems->ht_operation?

I checked, yes, we can do that. Since I just did it anyway, no need to
resend.

johannes

Re: [PATCH v4 5/6] mac80211: use ieee802_11_parse_elems() to find ies instead of ieee80211_bss_get_ie()

[Johannes Berg]

On Fri, 2021-09-24 at 12:13 +0200, Johannes Berg wrote:
> Taking a brief look before lunch,
> 
> >  	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) && !is_6ghz) {
> >  		const u8 *ht_oper_ie, *ht_cap_ie;
> >  
> > 
> > 
> > 
> > -		ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
> > +		ht_oper_ie = elems->ht_operation ?
> > +			((const u8 *)elems->ht_operation) - 2 :
> > +			NULL;
> >  		if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
> >  			ht_oper = (void *)(ht_oper_ie + 2);
> 
> Can't we drop these checks, and simply do
> 
> ht_oper = elems->ht_operation?

I checked, yes, we can do that. Since I just did it anyway, no need to
resend.

johannes


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[PATCH v4 6/6] mac80211: save transmit power envelope element and power constraint

[Wen Gong]

This is to save the transmit power envelope element and power
constraint in struct ieee80211_bss_conf for 6 GHz. Lower driver
will use this info to calculate the power limit.

Signed-off-by: Wen Gong <wgong@codeaurora.org>
---
 include/net/mac80211.h |  6 ++++++
 net/mac80211/mlme.c    | 30 ++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+)

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 8923a9fc4126..16a965262a4f 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -633,6 +633,9 @@ struct ieee80211_fils_discovery {
  * @beacon_tx_rate: The configured beacon transmit rate that needs to be passed
  *	to driver when rate control is offloaded to firmware.
  * @power_type: power type of BSS for 6 GHz
+ * @tx_pwr_env: transmit power envelope array of BSS.
+ * @tx_pwr_env_num: number of @tx_pwr_env.
+ * @pwr_reduction: power constraint of BSS.
  */
 struct ieee80211_bss_conf {
 	const u8 *bssid;
@@ -704,6 +707,9 @@ struct ieee80211_bss_conf {
 	bool s1g;
 	struct cfg80211_bitrate_mask beacon_tx_rate;
 	enum ieee80211_ap_reg_power power_type;
+	struct ieee80211_tx_pwr_env tx_pwr_env[IEEE80211_TPE_MAX_IE_COUNT];
+	u8 tx_pwr_env_num;
+	u8 pwr_reduction;
 };
 
 /**
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 6e8e90ee8b6c..b72fa1f6116a 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -2258,6 +2258,7 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
 {
 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_bss_conf *bss_conf;
 	u32 changed = 0;
 	struct ieee80211_prep_tx_info info = {
 		.subtype = stype,
@@ -2407,6 +2408,11 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
 	cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
 
 	sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
+
+	bss_conf = &sdata->vif.bss_conf;
+	bss_conf->pwr_reduction = 0;
+	bss_conf->tx_pwr_env_num = 0;
+	memset(bss_conf->tx_pwr_env, 0, sizeof(bss_conf->tx_pwr_env));
 }
 
 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
@@ -5095,6 +5101,30 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
 		else
 			he_oper = NULL;
 
+		if (is_6ghz) {
+			struct ieee80211_bss_conf *bss_conf;
+			u8 i, j = 0;
+
+			bss_conf = &sdata->vif.bss_conf;
+
+			if (elems->pwr_constr_elem)
+				bss_conf->pwr_reduction = *elems->pwr_constr_elem;
+
+			BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) !=
+				     ARRAY_SIZE(elems->tx_pwr_env));
+
+			for (i = 0; i < elems->tx_pwr_env_num; i++) {
+				if (elems->tx_pwr_env_len[i] >
+				    sizeof(bss_conf->tx_pwr_env[j]))
+					continue;
+
+				bss_conf->tx_pwr_env_num++;
+				memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i],
+				       elems->tx_pwr_env_len[i]);
+				j++;
+			}
+		}
+
 		if (!ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper))
 			ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
 	}
-- 
2.31.1


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[PATCH v4 6/6] mac80211: save transmit power envelope element and power constraint

[Wen Gong]

This is to save the transmit power envelope element and power
constraint in struct ieee80211_bss_conf for 6 GHz. Lower driver
will use this info to calculate the power limit.

Signed-off-by: Wen Gong <wgong@codeaurora.org>
---
 include/net/mac80211.h |  6 ++++++
 net/mac80211/mlme.c    | 30 ++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+)

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 8923a9fc4126..16a965262a4f 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -633,6 +633,9 @@ struct ieee80211_fils_discovery {
  * @beacon_tx_rate: The configured beacon transmit rate that needs to be passed
  *	to driver when rate control is offloaded to firmware.
  * @power_type: power type of BSS for 6 GHz
+ * @tx_pwr_env: transmit power envelope array of BSS.
+ * @tx_pwr_env_num: number of @tx_pwr_env.
+ * @pwr_reduction: power constraint of BSS.
  */
 struct ieee80211_bss_conf {
 	const u8 *bssid;
@@ -704,6 +707,9 @@ struct ieee80211_bss_conf {
 	bool s1g;
 	struct cfg80211_bitrate_mask beacon_tx_rate;
 	enum ieee80211_ap_reg_power power_type;
+	struct ieee80211_tx_pwr_env tx_pwr_env[IEEE80211_TPE_MAX_IE_COUNT];
+	u8 tx_pwr_env_num;
+	u8 pwr_reduction;
 };
 
 /**
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 6e8e90ee8b6c..b72fa1f6116a 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -2258,6 +2258,7 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
 {
 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_bss_conf *bss_conf;
 	u32 changed = 0;
 	struct ieee80211_prep_tx_info info = {
 		.subtype = stype,
@@ -2407,6 +2408,11 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
 	cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
 
 	sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
+
+	bss_conf = &sdata->vif.bss_conf;
+	bss_conf->pwr_reduction = 0;
+	bss_conf->tx_pwr_env_num = 0;
+	memset(bss_conf->tx_pwr_env, 0, sizeof(bss_conf->tx_pwr_env));
 }
 
 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
@@ -5095,6 +5101,30 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
 		else
 			he_oper = NULL;
 
+		if (is_6ghz) {
+			struct ieee80211_bss_conf *bss_conf;
+			u8 i, j = 0;
+
+			bss_conf = &sdata->vif.bss_conf;
+
+			if (elems->pwr_constr_elem)
+				bss_conf->pwr_reduction = *elems->pwr_constr_elem;
+
+			BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) !=
+				     ARRAY_SIZE(elems->tx_pwr_env));
+
+			for (i = 0; i < elems->tx_pwr_env_num; i++) {
+				if (elems->tx_pwr_env_len[i] >
+				    sizeof(bss_conf->tx_pwr_env[j]))
+					continue;
+
+				bss_conf->tx_pwr_env_num++;
+				memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i],
+				       elems->tx_pwr_env_len[i]);
+				j++;
+			}
+		}
+
 		if (!ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper))
 			ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
 	}
-- 
2.31.1