From a7c19b8a99a604e8940c7475220df5de7e295ffa Mon Sep 17 00:00:00 2001
From: "Bjoern A. Zeeb" <bz@FreeBSD.org>
Date: Sat, 28 Dec 2024 10:10:56 +0000
Subject: [PATCH] LinuxKPI; 802.11: start implementing
 cfg80211_calculate_bitrate()

For now we only return the legacy rate and have two TODOs for HT and
VHT which still need to be implemented as needed.

Sponsored by:	The FreeBSD Foundation
MFC after:	3 days
---
 .../linuxkpi/common/include/net/cfg80211.h    |  6 ++--
 sys/compat/linuxkpi/common/src/linux_80211.c  | 30 +++++++++++++++++++
 2 files changed, 33 insertions(+), 3 deletions(-)

diff --git a/sys/compat/linuxkpi/common/include/net/cfg80211.h b/sys/compat/linuxkpi/common/include/net/cfg80211.h
index bcbf629abb2..cf1e05dde7e 100644
--- a/sys/compat/linuxkpi/common/include/net/cfg80211.h
+++ b/sys/compat/linuxkpi/common/include/net/cfg80211.h
@@ -1304,6 +1304,7 @@ void linuxkpi_wiphy_delayed_work_cancel(struct wiphy *,
 
 int linuxkpi_regulatory_set_wiphy_regd_sync(struct wiphy *wiphy,
     struct linuxkpi_ieee80211_regdomain *regd);
+uint32_t linuxkpi_cfg80211_calculate_bitrate(struct rate_info *);
 uint32_t linuxkpi_ieee80211_channel_to_frequency(uint32_t, enum nl80211_band);
 uint32_t linuxkpi_ieee80211_frequency_to_channel(uint32_t, uint32_t);
 struct linuxkpi_ieee80211_channel *
@@ -1574,11 +1575,10 @@ cfg80211_find_vendor_ie(unsigned int oui, int oui_type,
 	return (__DECONST(uint8_t *, elem));
 }
 
-static __inline uint32_t
+static inline uint32_t
 cfg80211_calculate_bitrate(struct rate_info *rate)
 {
-	TODO();
-	return (-1);
+	return (linuxkpi_cfg80211_calculate_bitrate(rate));
 }
 
 static __inline uint32_t
diff --git a/sys/compat/linuxkpi/common/src/linux_80211.c b/sys/compat/linuxkpi/common/src/linux_80211.c
index f1738a30993..1d834673fa7 100644
--- a/sys/compat/linuxkpi/common/src/linux_80211.c
+++ b/sys/compat/linuxkpi/common/src/linux_80211.c
@@ -5890,6 +5890,36 @@ linuxkpi_wiphy_free(struct wiphy *wiphy)
 	kfree(lwiphy);
 }
 
+static uint32_t
+lkpi_cfg80211_calculate_bitrate_ht(struct rate_info *rate)
+{
+	TODO("cfg80211_calculate_bitrate_ht");
+	return (rate->legacy);
+}
+
+static uint32_t
+lkpi_cfg80211_calculate_bitrate_vht(struct rate_info *rate)
+{
+	TODO("cfg80211_calculate_bitrate_vht");
+	return (rate->legacy);
+}
+
+uint32_t
+linuxkpi_cfg80211_calculate_bitrate(struct rate_info *rate)
+{
+
+	/* Beware: order! */
+	if (rate->flags & RATE_INFO_FLAGS_MCS)
+		return (lkpi_cfg80211_calculate_bitrate_ht(rate));
+
+	if (rate->flags & RATE_INFO_FLAGS_VHT_MCS)
+		return (lkpi_cfg80211_calculate_bitrate_vht(rate));
+
+	IMPROVE("HE/EHT/...");
+
+	return (rate->legacy);
+}
+
 uint32_t
 linuxkpi_ieee80211_channel_to_frequency(uint32_t channel,
     enum nl80211_band band)