From mboxrd@z Thu Jan 1 00:00:00 1970 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9EF2FC433EF for ; Mon, 11 Oct 2021 15:11:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8553160F3A for ; Mon, 11 Oct 2021 15:11:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233277AbhJKPN4 (ORCPT ); Mon, 11 Oct 2021 11:13:56 -0400 Received: from so254-9.mailgun.net ([198.61.254.9]:60311 "EHLO so254-9.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231951AbhJKPNz (ORCPT ); Mon, 11 Oct 2021 11:13:55 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1633965115; h=Date: Message-ID: Cc: To: References: In-Reply-To: From: Subject: Content-Transfer-Encoding: MIME-Version: Content-Type: Sender; bh=ax258dGkFHdlEtg7gdzITAbzaEoTc1TinVq+aehmmo0=; b=bNzD/zyZD9B7YHJU1b9AH9XwhgFeaCvg+OwOTWb9lqy5Yzf3vbXhad1v/eQ7rW3q0tZUN3OK cgEL6ON316ADQpRmV7QLtEaWCIh++cpL1qKP5crBAvnzfG94+SafJX03BZCxEeeUFA0UrqXF NGyJtjqsLXil4ok+LVZ1ejqs7q0= X-Mailgun-Sending-Ip: 198.61.254.9 X-Mailgun-Sid: WyI3YTAwOSIsICJsaW51eC13aXJlbGVzc0B2Z2VyLmtlcm5lbC5vcmciLCAiYmU5ZTRhIl0= Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n01.prod.us-west-2.postgun.com with SMTP id 6164543503355859c8ef0c19 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Mon, 11 Oct 2021 15:11:49 GMT Sender: kvalo=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 4167EC4360D; Mon, 11 Oct 2021 15:11:49 +0000 (UTC) Received: from tykki.adurom.net (tynnyri.adurom.net [51.15.11.48]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: kvalo) by smtp.codeaurora.org (Postfix) with ESMTPSA id 8CEBAC4338F; Mon, 11 Oct 2021 15:11:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 smtp.codeaurora.org 8CEBAC4338F Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=codeaurora.org Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: Re: [PATCH 5/5] ath11k: Handle MSI enablement during rmmod and SSR From: Kalle Valo In-Reply-To: <20210913180246.193388-5-jouni@codeaurora.org> References: <20210913180246.193388-5-jouni@codeaurora.org> To: Jouni Malinen Cc: ath11k@lists.infradead.org, linux-wireless@vger.kernel.org, Baochen Qiang , Jouni Malinen User-Agent: pwcli/0.1.0-git (https://github.com/kvalo/pwcli/) Python/3.7.3 Message-ID: <163396510235.19083.7350385840200082489.kvalo@codeaurora.org> Date: Mon, 11 Oct 2021 15:11:49 +0000 (UTC) Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Jouni Malinen wrote: > When doing "rmmod ath11k_pci", ath11k performs global SOC reset > and MHI reset, where 0 address access is captured by IOMMU. See > log below: > > ... > [ 133.953860] ath11k_pci 0000:02:00.0: setting mhi state: DEINIT(1) > [ 133.959714] ath11k_pci 0000:02:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x000a address=0x0 flags=0x0020] > [ 133.973854] ath11k_pci 0000:02:00.0: MHISTATUS 0xff04 > [ 133.974095] ath11k_pci 0000:02:00.0: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x000a address=0x0 flags=0x0020] > ... > > This issue is also observed in SSR process, cause a similar > sequence as above is performed. > > Such an invalid access occurs because, during rmmod or SSR, MSI > address is cleared but HW MSI functionality not disabled, thus HW > target is able to raise an MSI transaction with 0 as MSI address. > > So it can be fixed by simply disabling MSI before reset. For SSR, > since MSI functionality is still needed after target is brought > back, we need to reenable it. > > Also change naming of some interfaces related. > > Tested-on: QCA6390 hw2.0 PCI WLAN.HST.1.0.1-01740-QCAHSTSWPLZ_V2_TO_X86-1 > Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-01720.1-QCAHSPSWPL_V1_V2_SILICONZ_LITE-1 > > Signed-off-by: Baochen Qiang > Signed-off-by: Jouni Malinen > Signed-off-by: Kalle Valo Patch applied to ath-next branch of ath.git, thanks. 96527d527b27 ath11k: Handle MSI enablement during rmmod and SSR -- https://patchwork.kernel.org/project/linux-wireless/patch/20210913180246.193388-5-jouni@codeaurora.org/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches