From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f169.google.com (mail-pf1-f169.google.com [209.85.210.169]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6498B44683E for ; Thu, 30 Jul 2026 16:04:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.169 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785427479; cv=none; b=cZbnioVxcUYQPyD8r0srB84WazKYQANuzfWWClFRIxKosqGnm2li6C+av7Flcx2dc3XTiTyGAKVZg3BXJWqKjRch94AtO4qNMVxtjzDL5s6ebrfXwsPCi6sKtRlSH4tS4FselQFSjpoPSwod+U7Li8NbJ4UTl+HK8zRY9/44m7M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785427479; c=relaxed/simple; bh=83sqCGdGcSCvVa+9JspIJKCFU9FvCzQFy5Q7L48LIJg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=cSrqI8TjkkSwKoQUsy/kE6E4vuuUm25d1+qJz+xaTICvDJjlT5ljzD4oKYWxvcyoaq/foDCK76jOxK78goo1J0CWoK1KSdwBTB/TCHWfgQnhV/TXU0B1IXNJCv7PFjMI41f7/cik8g9E8RCjx9mprXCgTzkDZ4SdT6JaIaUpLyU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=Nm7z0Bwa; arc=none smtp.client-ip=209.85.210.169 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Nm7z0Bwa" Received: by mail-pf1-f169.google.com with SMTP id d2e1a72fcca58-848c995c29dso3480b3a.3 for ; Thu, 30 Jul 2026 09:04:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1785427478; x=1786032278; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to:content-type; bh=3jIAI+a5zpsh6wBE3laZ7ci5SL/RFgEEpXPR8uss6Ao=; b=Nm7z0Bwagth6q7UjFiJYqXPIRLNO/lZ9txh8UYjs/3SMCUF3DHCjNb3vBXR6zXCRKS 9W8xZVZY59ib8TyyzI6uS+UfNq5pBTGOdard/JuHYgO+hHywTRWyvC9/dnS0CQXGJ9aE M4GWcg3jWBDiY13OMjRqMhkVCEi2fMlmLCS2lohXb8LI/sXvQRVDMjj3Dee1BynZ4vFJ GP186fcDdp4nCZN0vs1ufatfPboW+ESd806YJCSozUWdGhdKUY1F28TtwQJS41lBX8gG cI/SkIi+LRkp3fvuyzUxsnveUwAGEzQLySLp2fOHLcH66bGKbQBORtKCHjHiPeJP5dRw LGlQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1785427478; x=1786032278; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to:content-type; bh=3jIAI+a5zpsh6wBE3laZ7ci5SL/RFgEEpXPR8uss6Ao=; b=N+16x6pnOi5MtHJxsoE0BW5Ep7zW8kJByw4Gnlid5fcdXHI5rwNCyYsHaQWa/fXWbG YPHOrT0pN/MVoXz7IV69DS7a5vGLB8VACKRF3A0t+QJRRtqSh87u5zuOjulZxjp23Zkq vLgl1DHX3iWIO0cxFOkpUl2zyz1HAYZgJlsH+PJ1mykqceMleH96D2lhBhrbf2tvVsbV SfKDq6KncLifZ7dd3x+kpEkd0gCLkWUexGvDpqQgJ5xtW7DcvScltTOj18+kNKAzAnTr ZORbegDWRv8m5BNgoPfZw4PN1FKrAJl8ZbqdcwrzFRlIX+hhXKoeh6unO053yoWGnFg+ HMIw== X-Forwarded-Encrypted: i=1; AHgh+Rr6b1ku6nykDL5+X6LFTg742+JHA/zzctAZMSGRbmZFeeOe4DTT2uihTHY6jBPu4A78q++OD+HQ33Ligi4=@vger.kernel.org X-Gm-Message-State: AOJu0YyFzqLR6cJ9MYJH75ZYcyncK8o4Mj0+eKAaHg+xHZ8nUeJYDCyc 4ck7wgQGvvBUzVEc3sQlg5TqWczCNXiqQLEWimeO9CnwyiR5BI7BmpXteBFaeBPI X-Gm-Gg: AR+sD11r0EdxAKerVqCgtghfiTnLSXOmaJeEPpGp+NS4eOCapxkhWSba7wFhMZ7ijDC iN9jgcQlYqNhz1ywuzlsLRQ6IbnzIQT9i1juP7Epf3XXz4eFoEh3JKhIqQXp9NTDm1KXjvZz92u UfQw+gLDdoiWrqFa0mAif2xMNjEGD/+7PoFCJV/WFtM0X5Js3J3rxoEX9N+fU81/0vS0lACvTtE asFEnMlZwyPJu8kKeFrNW49Mn+LQ7AKm5KdUH3ia3M5TzsRr4/bdq4dLLJqOhWgN+X+cN8dJeJT SrALxN8ORTlQ9U3SYDeqADofgl/iFlhM3gB4WF12foHGn8PY1AYDpnJCdhRzlN+Yxj+CgXcJLGR sT5Bnd9kDBqlIpIwCQ974ymCXYOGVP07n+PCt42HA+ARYFp5xAJlrvGOPFaKpYYkVSZ015wUpFl p5ixToKAr9xSGYWaAhwSw9RcYgOXuNbERYFjdj6Ej3Z0moDPR7brfg5C+MYOwxdH1ZPuHe2huS6 eIzusvdoeghKg== X-Received: by 2002:a17:90b:1c89:b0:36d:b30b:14ed with SMTP id 98e67ed59e1d1-38fa80944a8mr870183a91.2.1785427477707; Thu, 30 Jul 2026 09:04:37 -0700 (PDT) Received: from Potato.tail66a299.ts.net ([171.76.83.76]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-13e72643a12sm35012783c88.5.2026.07.30.09.04.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 30 Jul 2026 09:04:37 -0700 (PDT) From: Shivesh X-Google-Original-From: Shivesh To: arend.vanspriel@broadcom.com Cc: linux-wireless@vger.kernel.org, brcm80211@lists.linux.dev, brcm80211-dev-list.pdl@broadcom.com, linux-kernel@vger.kernel.org, Shivesh Subject: [PATCH 3/8] wifi: brcmfmac: core: populate radiotap header with RSSI Date: Thu, 30 Jul 2026 16:03:51 +0000 Message-ID: <20260730160425.11933-3-shivesh@example.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260730160425.11933-1-shivesh@example.com> References: <20260730160425.11933-1-shivesh@example.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Populates the radiotap header with dbm_antsignal using the rssi value extracted from the firmware's hardware RX header, fixing missing signal data in monitor mode captures. Signed-off-by: Shivesh --- .../broadcom/brcm80211/brcmfmac/core.c | 34 +++++++++++-------- 1 file changed, 20 insertions(+), 14 deletions(-) diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c index ec170647800d..673f0000389c 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c @@ -431,45 +431,51 @@ void brcmf_netif_rx(struct brcmf_if *ifp, struct sk_buff *skb) netif_rx(skb); } +struct brcmf_radiotap_info { + struct ieee80211_radiotap_header hdr; + s8 dbm_antsignal; +} __packed; + void brcmf_netif_mon_rx(struct brcmf_if *ifp, struct sk_buff *skb) { if (brcmf_feat_is_enabled(ifp, BRCMF_FEAT_MONITOR_FMT_RADIOTAP)) { - /* Do nothing */ + /* Firmware already provided a full radiotap header; do nothing */ } else if (brcmf_feat_is_enabled(ifp, BRCMF_FEAT_MONITOR_FMT_HW_RX_HDR)) { struct wlc_d11rxhdr *wlc_rxhdr = (struct wlc_d11rxhdr *)skb->data; - struct ieee80211_radiotap_header *radiotap; + struct brcmf_radiotap_info *rtap; unsigned int offset; u16 RxStatus1; + s8 rssi; RxStatus1 = le16_to_cpu(wlc_rxhdr->rxhdr.RxStatus1); + rssi = wlc_rxhdr->rssi; offset = sizeof(struct wlc_d11rxhdr); - /* MAC inserts 2 pad bytes for a4 headers or QoS or A-MSDU - * subframes - */ + /* MAC inserts 2 pad bytes for a4 headers or QoS or A-MSDU subframes */ if (RxStatus1 & RXS_PBPRES) offset += 2; offset += D11_PHY_HDR_LEN; skb_pull(skb, offset); - /* TODO: use RX header to fill some radiotap data */ - radiotap = skb_push(skb, sizeof(*radiotap)); - memset(radiotap, 0, sizeof(*radiotap)); - radiotap->it_len = cpu_to_le16(sizeof(*radiotap)); + /* Insert our radiotap header with RSSI data */ + rtap = skb_push(skb, sizeof(*rtap)); + memset(rtap, 0, sizeof(*rtap)); + rtap->hdr.it_len = cpu_to_le16(sizeof(*rtap)); + rtap->hdr.it_present = cpu_to_le32(1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL); + rtap->dbm_antsignal = rssi; - /* TODO: 4 bytes with receive status? */ - skb->len -= 4; + /* Strip the 4-byte receive status / FCS tail */ + skb_trim(skb, skb->len - 4); } else { struct ieee80211_radiotap_header *radiotap; - /* TODO: use RX status to fill some radiotap data */ radiotap = skb_push(skb, sizeof(*radiotap)); memset(radiotap, 0, sizeof(*radiotap)); radiotap->it_len = cpu_to_le16(sizeof(*radiotap)); - /* TODO: 4 bytes with receive status? */ - skb->len -= 4; + /* Strip the 4-byte receive status / FCS tail */ + skb_trim(skb, skb->len - 4); } skb->dev = ifp->ndev; -- 2.53.0