From patchwork Thu Aug 4 00:28:10 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Wang X-Patchwork-Id: 12935960 X-Patchwork-Delegate: nbd@nbd.name Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 503FFC19F29 for ; Thu, 4 Aug 2022 00:28:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238454AbiHDA2V (ORCPT ); Wed, 3 Aug 2022 20:28:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45444 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237699AbiHDA2U (ORCPT ); Wed, 3 Aug 2022 20:28:20 -0400 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6597458B66 for ; Wed, 3 Aug 2022 17:28:18 -0700 (PDT) X-UUID: 6659939f87a844c7bdfd53ad9953f4f4-20220804 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=FYOeFlvctrJ/dgmuTg88/fup7nu5vPDuIphJR9xdtSs=; b=NW9MSuNHL8+mcr+w2uMiDI8WhOAnZNKEm3mYbOFtd8MMjZYUot/J08K84G4Gh3klHdCjALjQk2pDPLM+pJfwgsrpsUPCHSmEgsz3QPf0uv5C0ErJNL/VrAWs+smkbDQwu9/bEWY4GoDr1UxmWfipgDYTLS4QHGkutLjKCgd1+8A=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.8,REQID:185febde-3fef-4752-8d7b-739971fb28e2,OB:0,LO B:0,IP:0,URL:5,TC:0,Content:0,EDM:0,RT:0,SF:95,FILE:0,RULE:Release_Ham,ACT ION:release,TS:100 X-CID-INFO: VERSION:1.1.8,REQID:185febde-3fef-4752-8d7b-739971fb28e2,OB:0,LOB: 0,IP:0,URL:5,TC:0,Content:0,EDM:0,RT:0,SF:95,FILE:0,RULE:Spam_GS981B3D,ACT ION:quarantine,TS:100 X-CID-META: VersionHash:0f94e32,CLOUDID:537838d0-a6cf-4fb6-be1b-c60094821ca2,C OID:2ef07a4ed109,Recheck:0,SF:28|17|19|48,TC:nil,Content:0,EDM:-3,IP:nil,U RL:1,File:nil,QS:nil,BEC:nil,COL:0 X-UUID: 6659939f87a844c7bdfd53ad9953f4f4-20220804 Received: from mtkcas11.mediatek.inc [(172.21.101.40)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 532612246; Thu, 04 Aug 2022 08:28:13 +0800 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs11n2.mediatek.inc (172.21.101.187) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.792.15; Thu, 4 Aug 2022 08:28:11 +0800 Received: from mtkswgap22.mediatek.inc (172.21.77.33) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.792.15 via Frontend Transport; Thu, 4 Aug 2022 08:28:11 +0800 From: To: , CC: , , , , , , , , , , , , , , , , , , , , , , , , Deren Wu Subject: [PATCH] mt76: mt7921: fix antenna signal are way off in monitor mode Date: Thu, 4 Aug 2022 08:28:10 +0800 Message-ID: <801aefc1be0c1d29d63c916a4ebb79114ec7f29e.1659571933.git.objelf@gmail.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Sean Wang Group 3 in RxD is disabled in monitor mode. We should use the group 5 in RxD instead to fix antenna signal way off issue, e.g we would see the incorrect antenna signal value in wireshark. In the other hand, Group 5 wouldn't be used in STA or AP mode, so the patch shouldn't cause any harm to those modes. Fixes: cbaa0a404f8d ("mt76: mt7921: fix up the monitor mode") Reported-by: Adrian Granados Co-developed-by: Deren Wu Signed-off-by: Deren Wu Signed-off-by: Sean Wang --- .../net/wireless/mediatek/mt76/mt7921/mac.c | 33 ++++++++++++------- 1 file changed, 22 insertions(+), 11 deletions(-) status->chain_signal[i] >= 0) @@ -408,17 +430,6 @@ mt7921_mac_fill_rx(struct mt7921_dev *dev, struct sk_buff *skb) status->signal = max(status->signal, status->chain_signal[i]); } - - ret = mt76_connac2_mac_fill_rx_rate(&dev->mt76, status, sband, - rxv, &mode); - if (ret < 0) - return ret; - - if (rxd1 & MT_RXD1_NORMAL_GROUP_5) { - rxd += 18; - if ((u8 *)rxd - skb->data >= skb->len) - return -EINVAL; - } } amsdu_info = FIELD_GET(MT_RXD4_NORMAL_PAYLOAD_FORMAT, rxd4); diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c index 47f0aa81ab02..8be422936b74 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c +++ b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c @@ -394,12 +394,34 @@ mt7921_mac_fill_rx(struct mt7921_dev *dev, struct sk_buff *skb) if (v0 & MT_PRXV_HT_AD_CODE) status->enc_flags |= RX_ENC_FLAG_LDPC; + ret = mt76_connac2_mac_fill_rx_rate(&dev->mt76, status, sband, + rxv, &mode); + if (ret < 0) + return ret; + + if (rxd1 & MT_RXD1_NORMAL_GROUP_5) { + rxd += 6; + if ((u8 *)rxd - skb->data >= skb->len) + return -EINVAL; + + rxv = rxd; + /* Monitor mode would use RCPI described in GROUP 5 + * instead. + */ + v1 = le32_to_cpu(rxv[0]); + + rxd += 12; + if ((u8 *)rxd - skb->data >= skb->len) + return -EINVAL; + } + status->chains = mphy->antenna_mask; status->chain_signal[0] = to_rssi(MT_PRXV_RCPI0, v1); status->chain_signal[1] = to_rssi(MT_PRXV_RCPI1, v1); status->chain_signal[2] = to_rssi(MT_PRXV_RCPI2, v1); status->chain_signal[3] = to_rssi(MT_PRXV_RCPI3, v1); status->signal = -128; + for (i = 0; i < hweight8(mphy->antenna_mask); i++) { if (!(status->chains & BIT(i)) ||