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From:   Wen Gong <wgong@codeaurora.org>
To:     johannes@sipsolutions.net, ath11k@lists.infradead.org
Cc:     linux-wireless@vger.kernel.org, wgong@codeaurora.org
Subject: [PATCH v3 7/9] mac80211: add parse transmit power envelope element
Date:   Fri,  3 Sep 2021 07:48:19 -0400
Message-Id: <20210903114821.23346-8-wgong@codeaurora.org>
In-Reply-To: <20210903114821.23346-1-wgong@codeaurora.org>
References: <20210903114821.23346-1-wgong@codeaurora.org>
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The transmit power envelope elements in beacon is used to calculate
the power limit by lower driver, and sometimes it has more than
one elements in a beacon frame.

This is to add parse the transmit power envelope elements, then it
will be saved and transfer to lower driver to calculate the power
limit.

Signed-off-by: Wen Gong <wgong@codeaurora.org>
---
 net/mac80211/ieee80211_i.h |  3 +++
 net/mac80211/util.c        | 10 ++++++++++
 2 files changed, 13 insertions(+)

diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 648696b49f89..bb62de5e3758 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -1494,6 +1494,7 @@ struct ieee802_11_elems {
 	const struct ieee80211_he_spr *he_spr;
 	const struct ieee80211_mu_edca_param_set *mu_edca_param_set;
 	const struct ieee80211_he_6ghz_capa *he_6ghz_capa;
+	const struct ieee80211_tx_pwr_env *tx_pwr_env[IEEE80211_TPE_MAX_IE_COUNT];
 	const u8 *uora_element;
 	const u8 *mesh_id;
 	const u8 *peering;
@@ -1544,6 +1545,8 @@ struct ieee802_11_elems {
 	u8 perr_len;
 	u8 country_elem_len;
 	u8 bssid_index_len;
+	u8 tx_pwr_env_len[IEEE80211_TPE_MAX_IE_COUNT];
+	u8 tx_pwr_env_num;
 
 	/* whether a parse error occurred while retrieving these elements */
 	bool parse_error;
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 04f2ba530d4f..c94ba3221086 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1336,6 +1336,16 @@ _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
 			elems->rsnx = pos;
 			elems->rsnx_len = elen;
 			break;
+		case WLAN_EID_TX_POWER_ENVELOPE:
+			if (elems->tx_pwr_env_num >= ARRAY_SIZE(elems->tx_pwr_env) ||
+			    elen < 1 ||
+			    elen > sizeof(elems->tx_pwr_env[0]))
+				break;
+
+			elems->tx_pwr_env[elems->tx_pwr_env_num] = (void *)pos;
+			elems->tx_pwr_env_len[elems->tx_pwr_env_num] = elen;
+			elems->tx_pwr_env_num++;
+			break;
 		case WLAN_EID_EXTENSION:
 			ieee80211_parse_extension_element(calc_crc ?
 								&crc : NULL,
-- 
2.31.1