From patchwork Fri Oct 30 04:10:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bhaumik Bhatt X-Patchwork-Id: 11868457 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id EEE6B14C0 for ; Fri, 30 Oct 2020 04:11:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C703720719 for ; Fri, 30 Oct 2020 04:11:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="oTr9qLsx" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726591AbgJ3ELp (ORCPT ); Fri, 30 Oct 2020 00:11:45 -0400 Received: from m42-4.mailgun.net ([69.72.42.4]:46663 "EHLO m42-4.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726355AbgJ3ELN (ORCPT ); Fri, 30 Oct 2020 00:11:13 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1604031072; h=Message-Id: Date: Subject: Cc: To: From: Sender; bh=bhu3dVNa1poHcyO9P0oym7CJWWezz4vVImWxqI5HZAU=; b=oTr9qLsxUoyJk3lC5/0hLaMGQEF8nkteG7tYrrgTKYL6hD/a7KqQVmlgfye7vKNJ13cy1g9W HhZEAc8i5Y19yJz/b+HCcNpswYL8i5Pv7afaZYbx0TKiBN1orG07JU2GvCjrCsDrYbUD4sD5 MkzxQ+QOnXcoskrCGGT10Co6+TY= X-Mailgun-Sending-Ip: 69.72.42.4 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-n07.prod.us-west-2.postgun.com with SMTP id 5f9b9259c3d7c9858af1b198 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Fri, 30 Oct 2020 04:11:05 GMT Sender: bbhatt=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 5E953C433C9; Fri, 30 Oct 2020 04:11:05 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=ALL_TRUSTED,BAYES_00,SPF_FAIL autolearn=no autolearn_force=no version=3.4.0 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 5F4D9C433FF; Fri, 30 Oct 2020 04:11:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 5F4D9C433FF 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, Bhaumik Bhatt Subject: [PATCH v3 00/12] Bug fixes and improvements for MHI power operations Date: Thu, 29 Oct 2020 21:10:45 -0700 Message-Id: <1604031057-32820-1-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 Bug fixes and improvements for MHI powerup and shutdown handling. Firmware load function names are updated to accurately reflect their purpose. Closed certain design gaps where the host (MHI bus) would allow clients to operate after a power down or error detection. Move to an error state sooner based on different scenarios. These patches were tested on arm64 and X86_64 architectures. v3: -Fixed bus: mhi: core: Remove MHI event ring IRQ handlers when powering down -Mistakenly placed the free_irq() calls in mhi_pm_sys_error_transition() -Moved it to mhi_pm_disable_transition() v2: -Addressed patches based on review comments and made improvements -Added bus: mhi: core: Check for IRQ availability during registration -Dropped bus: mhi: core: Use the IRQF_ONESHOT flag for the BHI interrupt line -Split bus: mhi: core: Move to an error state on any firmware load failure -Modified the following patches: -bus: mhi: core: Disable IRQs when powering down -bus: mhi: core: Improve shutdown handling after link down detection -bus: mhi: core: Mark device inactive soon after host issues a shutdown -bus: mhi: core: Move to SYS_ERROR regardless of RDDM capability -Addressed the above as follow-up patches with improvements: -bus: mhi: core: Prevent sending multiple RDDM entry callbacks -bus: mhi: core: Separate system error and power down handling -bus: mhi: core: Remove MHI event ring IRQ handlers when powering down Bhaumik Bhatt (12): bus: mhi: core: Use appropriate names for firmware load functions bus: mhi: core: Move to using high priority workqueue bus: mhi: core: Skip device wake in error or shutdown states bus: mhi: core: Move to SYS_ERROR regardless of RDDM capability bus: mhi: core: Prevent sending multiple RDDM entry callbacks bus: mhi: core: Move to an error state on any firmware load failure bus: mhi: core: Use appropriate label in firmware load handler API bus: mhi: core: Move to an error state on mission mode failure bus: mhi: core: Check for IRQ availability during registration bus: mhi: core: Separate system error and power down handling bus: mhi: core: Mark and maintain device states early on after power down bus: mhi: core: Remove MHI event ring IRQ handlers when powering down drivers/bus/mhi/core/boot.c | 60 ++++++----- drivers/bus/mhi/core/init.c | 10 +- drivers/bus/mhi/core/main.c | 16 +-- drivers/bus/mhi/core/pm.c | 236 ++++++++++++++++++++++++++++++++------------ include/linux/mhi.h | 2 + 5 files changed, 225 insertions(+), 99 deletions(-)