From patchwork Mon Jul 4 02:34:48 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ping-Ke Shih X-Patchwork-Id: 588106 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 B6035C433EF for ; Mon, 4 Jul 2022 02:36:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231928AbiGDCgF (ORCPT ); Sun, 3 Jul 2022 22:36:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58374 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229565AbiGDCgD (ORCPT ); Sun, 3 Jul 2022 22:36:03 -0400 Received: from rtits2.realtek.com.tw (rtits2.realtek.com [211.75.126.72]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C09AE64D8 for ; Sun, 3 Jul 2022 19:36:02 -0700 (PDT) Authenticated-By: X-SpamFilter-By: ArmorX SpamTrap 5.73 with qID 2642ZkSuA010929, This message is accepted by code: ctloc85258 Received: from mail.realtek.com (rtexh36505.realtek.com.tw[172.21.6.25]) by rtits2.realtek.com.tw (8.15.2/2.71/5.88) with ESMTPS id 2642ZkSuA010929 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Mon, 4 Jul 2022 10:35:46 +0800 Received: from RTEXMBS04.realtek.com.tw (172.21.6.97) by RTEXH36505.realtek.com.tw (172.21.6.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.28; Mon, 4 Jul 2022 10:35:46 +0800 Received: from localhost (172.21.69.188) by RTEXMBS04.realtek.com.tw (172.21.6.97) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.27; Mon, 4 Jul 2022 10:35:45 +0800 From: Ping-Ke Shih To: CC: , , , Subject: [PATCH 1/6] rtw89: 8852c: disable dma during mac init Date: Mon, 4 Jul 2022 10:34:48 +0800 Message-ID: <20220704023453.19935-2-pkshih@realtek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220704023453.19935-1-pkshih@realtek.com> References: <20220704023453.19935-1-pkshih@realtek.com> MIME-Version: 1.0 X-Originating-IP: [172.21.69.188] X-ClientProxiedBy: RTEXMBS02.realtek.com.tw (172.21.6.95) To RTEXMBS04.realtek.com.tw (172.21.6.97) X-KSE-ServerInfo: RTEXMBS04.realtek.com.tw, 9 X-KSE-AntiSpam-Interceptor-Info: trusted connection X-KSE-Antiphishing-Info: Clean X-KSE-Antiphishing-ScanningType: Deterministic X-KSE-Antiphishing-Method: None X-KSE-Antiphishing-Bases: 07/04/2022 02:15:00 X-KSE-AttachmentFiltering-Interceptor-Info: no applicable attachment filtering rules found X-KSE-Antivirus-Interceptor-Info: scan successful X-KSE-Antivirus-Info: =?big5_tw?b?Q2xlYW4sIGJhc2VzOiAyMDIyLzcvMyCkVaTIIDEwOjAw?= =?big5_tw?b?OjAw?= X-KSE-BulkMessagesFiltering-Scan-Result: protection disabled X-KSE-ServerInfo: RTEXH36505.realtek.com.tw, 9 X-KSE-Attachment-Filter-Triggered-Rules: Clean X-KSE-Attachment-Filter-Triggered-Filters: Clean X-KSE-BulkMessagesFiltering-Scan-Result: protection disabled Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Po-Hao Huang Without this patch, our hardware attempts to perform dma while device cpu restarts, and leads to iommu page faults caused by invalid requests. Some platforms show warning messages as below: rtw89_8852ce 0000:01:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x000a address=0x10000000004 flags=0x0030] Signed-off-by: Po-Hao Huang Signed-off-by: Ping-Ke Shih --- drivers/net/wireless/realtek/rtw89/pci.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/wireless/realtek/rtw89/pci.c b/drivers/net/wireless/realtek/rtw89/pci.c index 73b3b7e9fe6f5..19217a6951c97 100644 --- a/drivers/net/wireless/realtek/rtw89/pci.c +++ b/drivers/net/wireless/realtek/rtw89/pci.c @@ -1627,6 +1627,8 @@ static void rtw89_pci_ctrl_dma_all(struct rtw89_dev *rtwdev, bool enable) else rtw89_write32_clr(rtwdev, R_AX_PCIE_INIT_CFG1, B_AX_STOP_AXI_MST); + rtw89_write32_clr(rtwdev, R_AX_PCIE_INIT_CFG1, + txhci_en | rxhci_en); if (chip_id == RTL8852C) rtw89_write32_set(rtwdev, R_AX_PCIE_INIT_CFG1, B_AX_STOP_AXI_MST);