From patchwork Fri Feb 19 23:11:35 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bhaumik Bhatt X-Patchwork-Id: 12096333 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A4B9BC433E6 for ; Fri, 19 Feb 2021 23:12:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 63F2664EB3 for ; Fri, 19 Feb 2021 23:12:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229811AbhBSXMh (ORCPT ); Fri, 19 Feb 2021 18:12:37 -0500 Received: from m42-2.mailgun.net ([69.72.42.2]:58034 "EHLO m42-2.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229755AbhBSXMg (ORCPT ); Fri, 19 Feb 2021 18:12:36 -0500 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1613776336; h=Message-Id: Date: Subject: Cc: To: From: Sender; bh=R/lbQE49SXblxySEVCtOZM3GxkFhlatGt41w8NN+DwY=; b=cKSFldPvGkoG8otEPTAyf8ST5PCGO8ojNRdPJRCApgDQ1u05nWyN/oynG4yxcmeSld5Xa4td PkTHGsp8xjAa761nV/bAFDpI/jT+X3/LICEfA7gkc5jV+8joc/+XvxrHn+mNamyzcNx1Xpaz 8skfx9RILcNzQKuRawdff2BcUdk= X-Mailgun-Sending-Ip: 69.72.42.2 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n05.prod.us-east-1.postgun.com with SMTP id 603045b29946643859caf1d4 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Fri, 19 Feb 2021 23:11:46 GMT Sender: bbhatt=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 60F9EC433C6; Fri, 19 Feb 2021 23:11:45 +0000 (UTC) Received: from malabar-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: bbhatt) by smtp.codeaurora.org (Postfix) with ESMTPSA id 58E7FC433C6; Fri, 19 Feb 2021 23:11:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 58E7FC433C6 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=bbhatt@codeaurora.org From: Bhaumik Bhatt To: manivannan.sadhasivam@linaro.org Cc: linux-arm-msm@vger.kernel.org, hemantk@codeaurora.org, jhugo@codeaurora.org, linux-kernel@vger.kernel.org, loic.poulain@linaro.org, carl.yin@quectel.com, naveen.kumar@quectel.com, Bhaumik Bhatt Subject: [PATCH v5 0/3] Serialize execution environment changes for MHI Date: Fri, 19 Feb 2021 15:11:35 -0800 Message-Id: <1613776298-35560-1-git-send-email-bbhatt@codeaurora.org> X-Mailer: git-send-email 2.7.4 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org v5: -Update commit text for "clear devices when moving execution environments" patch -Added test platform details that were missed out in the cover letter -Merged two if checks in to a single one for EE serialization patch v4: -Addressed review comments for additional info logging for EE movements -Updated switch case for EE handling in mhi_intvec_threaded_handler() v3: -Update commit text to accurately reflect changes and reasoning based on reviews v2: -Add patch to clear devices when moving execution environments During full boot chain firmware download, the PM state worker downloads the AMSS image after waiting for the SBL execution environment change in PBL mode itself. Since getting rid of the firmware load worker thread, this design needs to change and MHI host must download the AMSS image from the SBL mode of PM state worker thread instead of blocking waits for SBL EE in PBL transition processing. Ensure that EE changes are handled only from appropriate places and occur one after another and handle only PBL or RDDM EE changes as critical events directly from the interrupt handler and the status callback is given to the controller drivers promptly. When moving from SBL to AMSS EE, clear SBL specific client devices by calling remove callbacks for them so they are not left opened in a different execution environment. This patchset was tested on ARM64. Bhaumik Bhatt (3): bus: mhi: core: Clear devices when moving execution environments bus: mhi: core: Download AMSS image from appropriate function bus: mhi: core: Process execution environment changes serially drivers/bus/mhi/core/boot.c | 48 +++++++++++++++--------------- drivers/bus/mhi/core/internal.h | 1 + drivers/bus/mhi/core/main.c | 65 ++++++++++++++++++++++++++--------------- drivers/bus/mhi/core/pm.c | 10 +++++-- 4 files changed, 75 insertions(+), 49 deletions(-)