[PATCH v2 7/8] mac80211: add parse transmit power envelope element

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 v2 7/8] mac80211: add parse transmit power envelope element
Date: Fri, 20 Aug 2021 08:20:40 -0400	[thread overview]
Message-ID: <20210820122041.12157-8-wgong@codeaurora.org> (raw)
In-Reply-To: <20210820122041.12157-1-wgong@codeaurora.org>

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        | 9 +++++++++
 2 files changed, 12 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 cb1c35d8ef48..12c70cc30461 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1336,6 +1336,15 @@ _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)
+				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

