From patchwork Fri Feb 19 23:11:36 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bhaumik Bhatt X-Patchwork-Id: 384951 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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, 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 EE186C43381 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 BC6D164EB2 for ; Fri, 19 Feb 2021 23:12:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229862AbhBSXMo (ORCPT ); Fri, 19 Feb 2021 18:12:44 -0500 Received: from m42-2.mailgun.net ([69.72.42.2]:17314 "EHLO m42-2.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229819AbhBSXMm (ORCPT ); Fri, 19 Feb 2021 18:12:42 -0500 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1613776343; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=yZCp1SkTjfznyRj0k3J599t01dK+KOXu4DyNNVkkx0c=; b=Ycq0GRlMTQOrqM2ovs6BX7bxRtSchgyyRD2jp4xaX6dMTKshbmKuW1EFu+aw3CanZYZRScge vbdky7NmqducG3wsW6niLn+7cFqGV5iahMbcexgbn5YMvPUf8op2E7dgfmUJiGqUw0aO3l5R bwcrYC4y+eczFiToKbe+UyLP++Y= 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-n03.prod.us-west-2.postgun.com with SMTP id 603045b2ba086638300f304f (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 5EADAC433C6; Fri, 19 Feb 2021 23:11:46 +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 0C67DC433CA; Fri, 19 Feb 2021 23:11:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 0C67DC433CA 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 1/3] bus: mhi: core: Clear devices when moving execution environments Date: Fri, 19 Feb 2021 15:11:36 -0800 Message-Id: <1613776298-35560-2-git-send-email-bbhatt@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1613776298-35560-1-git-send-email-bbhatt@codeaurora.org> References: <1613776298-35560-1-git-send-email-bbhatt@codeaurora.org> Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Currently, client driver devices are being created in SBL or AMSS (mission mode) and only destroyed after power down or SYS_ERROR occurs. When moving between certain execution environments, there is no power down or SYS_ERROR processing required. This presents an issue when moving from SBL to mission mode, for example, where there is also no remove notification to client drivers operating in SBL mode. Thus, SBL-specific channels are left open and client drivers are unaware of the new execution environment where they cannot operate. Fix this by expanding mhi_destroy_device() to do an execution environment specific clean up if one is requested. Close this gap to issue remove callbacks in such scenarios that allow SBL-specific client drivers to clean-up once device enters mission mode. Signed-off-by: Bhaumik Bhatt --- drivers/bus/mhi/core/main.c | 27 +++++++++++++++++++++++---- drivers/bus/mhi/core/pm.c | 3 +++ 2 files changed, 26 insertions(+), 4 deletions(-) diff --git a/drivers/bus/mhi/core/main.c b/drivers/bus/mhi/core/main.c index 4e0131b..58f1425 100644 --- a/drivers/bus/mhi/core/main.c +++ b/drivers/bus/mhi/core/main.c @@ -244,8 +244,10 @@ static void mhi_del_ring_element(struct mhi_controller *mhi_cntrl, int mhi_destroy_device(struct device *dev, void *data) { + struct mhi_chan *ul_chan, *dl_chan; struct mhi_device *mhi_dev; struct mhi_controller *mhi_cntrl; + enum mhi_ee_type ee = MHI_EE_MAX; if (dev->bus != &mhi_bus_type) return 0; @@ -257,6 +259,17 @@ int mhi_destroy_device(struct device *dev, void *data) if (mhi_dev->dev_type == MHI_DEVICE_CONTROLLER) return 0; + ul_chan = mhi_dev->ul_chan; + dl_chan = mhi_dev->dl_chan; + + /* + * If execution environment is specified, remove only those devices that + * started in them based on ee_mask for the channels as we move on to a + * different execution environment + */ + if (data) + ee = *(enum mhi_ee_type *)data; + /* * For the suspend and resume case, this function will get called * without mhi_unregister_controller(). Hence, we need to drop the @@ -264,11 +277,17 @@ int mhi_destroy_device(struct device *dev, void *data) * be sure that there will be no instances of mhi_dev left after * this. */ - if (mhi_dev->ul_chan) - put_device(&mhi_dev->ul_chan->mhi_dev->dev); + if (ul_chan) { + if (ee != MHI_EE_MAX && !(ul_chan->ee_mask & BIT(ee))) + return 0; + put_device(&ul_chan->mhi_dev->dev); + } - if (mhi_dev->dl_chan) - put_device(&mhi_dev->dl_chan->mhi_dev->dev); + if (dl_chan) { + if (ee != MHI_EE_MAX && !(dl_chan->ee_mask & BIT(ee))) + return 0; + put_device(&dl_chan->mhi_dev->dev); + } dev_dbg(&mhi_cntrl->mhi_dev->dev, "destroy device for chan:%s\n", mhi_dev->name); diff --git a/drivers/bus/mhi/core/pm.c b/drivers/bus/mhi/core/pm.c index 681960c..8da8806 100644 --- a/drivers/bus/mhi/core/pm.c +++ b/drivers/bus/mhi/core/pm.c @@ -377,6 +377,7 @@ static int mhi_pm_mission_mode_transition(struct mhi_controller *mhi_cntrl) { struct mhi_event *mhi_event; struct device *dev = &mhi_cntrl->mhi_dev->dev; + enum mhi_ee_type ee = MHI_EE_MAX, current_ee = mhi_cntrl->ee; int i, ret; dev_dbg(dev, "Processing Mission Mode transition\n"); @@ -395,6 +396,8 @@ static int mhi_pm_mission_mode_transition(struct mhi_controller *mhi_cntrl) wake_up_all(&mhi_cntrl->state_event); + device_for_each_child(&mhi_cntrl->mhi_dev->dev, ¤t_ee, + mhi_destroy_device); mhi_cntrl->status_cb(mhi_cntrl, MHI_CB_EE_MISSION_MODE); /* Force MHI to be in M0 state before continuing */ From patchwork Fri Feb 19 23:11:37 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bhaumik Bhatt X-Patchwork-Id: 384950 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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, 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 B6FE3C433DB 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 8D32564ED2 for ; Fri, 19 Feb 2021 23:12:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229755AbhBSXMj (ORCPT ); Fri, 19 Feb 2021 18:12:39 -0500 Received: from m42-2.mailgun.net ([69.72.42.2]:53082 "EHLO m42-2.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229652AbhBSXMh (ORCPT ); Fri, 19 Feb 2021 18:12:37 -0500 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1613776337; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=ToUYX1fzS/6Po1nFOrkd96NtJXG6i4KSFNc2W66X8Zo=; b=L36qPdVZlPMdVIK4LZDnwM+ujjfyMMKEv7ZBcKdS7d3MUb0/XJhWtvpC1a8Cz21/iyYksuaL tD9dpOw3+ZUZWXKMKeUiqqeGFpf3Pl7eEVd8LjweJktDSJR6Bb7DYrcwVybnemsHNXtADe7X +gIct6rODxC7LYUDA56ynzD67I4= 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-n02.prod.us-east-1.postgun.com with SMTP id 603045b30ccf3cf226a4297f (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Fri, 19 Feb 2021 23:11:47 GMT Sender: bbhatt=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id C3FC0C43467; Fri, 19 Feb 2021 23:11:46 +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 ACD1BC43462; Fri, 19 Feb 2021 23:11:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org ACD1BC43462 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 2/3] bus: mhi: core: Download AMSS image from appropriate function Date: Fri, 19 Feb 2021 15:11:37 -0800 Message-Id: <1613776298-35560-3-git-send-email-bbhatt@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1613776298-35560-1-git-send-email-bbhatt@codeaurora.org> References: <1613776298-35560-1-git-send-email-bbhatt@codeaurora.org> Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org During full boot chain firmware download, the PM state worker downloads the AMSS image after a blocking wait for the SBL execution environment change when running in PBL transition itself. Improve this design by having the host download the AMSS image from the SBL transition of PM state worker thread when a DEV_ST_TRANSITION_SBL is queued instead of the blocking wait. Signed-off-by: Bhaumik Bhatt --- drivers/bus/mhi/core/boot.c | 48 ++++++++++++++++++++--------------------- drivers/bus/mhi/core/internal.h | 1 + drivers/bus/mhi/core/pm.c | 2 ++ 3 files changed, 27 insertions(+), 24 deletions(-) diff --git a/drivers/bus/mhi/core/boot.c b/drivers/bus/mhi/core/boot.c index c2546bf..983e6b5 100644 --- a/drivers/bus/mhi/core/boot.c +++ b/drivers/bus/mhi/core/boot.c @@ -389,7 +389,6 @@ static void mhi_firmware_copy(struct mhi_controller *mhi_cntrl, void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl) { const struct firmware *firmware = NULL; - struct image_info *image_info; struct device *dev = &mhi_cntrl->mhi_dev->dev; const char *fw_name; void *buf; @@ -493,35 +492,15 @@ void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl) ret = mhi_ready_state_transition(mhi_cntrl); if (!mhi_cntrl->fbc_download) - return; + goto exit_fw_load; if (ret) { dev_err(dev, "MHI did not enter READY state\n"); goto error_ready_state; } - /* Wait for the SBL event */ - ret = wait_event_timeout(mhi_cntrl->state_event, - mhi_cntrl->ee == MHI_EE_SBL || - MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state), - msecs_to_jiffies(mhi_cntrl->timeout_ms)); - - if (!ret || MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) { - dev_err(dev, "MHI did not enter SBL\n"); - goto error_ready_state; - } - - /* Start full firmware image download */ - image_info = mhi_cntrl->fbc_image; - ret = mhi_fw_load_bhie(mhi_cntrl, - /* Vector table is the last entry */ - &image_info->mhi_buf[image_info->entries - 1]); - if (ret) { - dev_err(dev, "MHI did not load image over BHIe, ret: %d\n", - ret); - goto error_fw_load; - } - +exit_fw_load: + dev_info(dev, "Wait for device to enter SBL or Mission mode\n"); return; error_ready_state: @@ -532,3 +511,24 @@ void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl) mhi_cntrl->pm_state = MHI_PM_FW_DL_ERR; wake_up_all(&mhi_cntrl->state_event); } + +int mhi_download_amss_image(struct mhi_controller *mhi_cntrl) +{ + struct image_info *image_info = mhi_cntrl->fbc_image; + struct device *dev = &mhi_cntrl->mhi_dev->dev; + int ret; + + if (!image_info) + return -EIO; + + ret = mhi_fw_load_bhie(mhi_cntrl, + /* Vector table is the last entry */ + &image_info->mhi_buf[image_info->entries - 1]); + if (ret) { + dev_err(dev, "MHI did not load AMSS, ret:%d\n", ret); + mhi_cntrl->pm_state = MHI_PM_FW_DL_ERR; + wake_up_all(&mhi_cntrl->state_event); + } + + return ret; +} diff --git a/drivers/bus/mhi/core/internal.h b/drivers/bus/mhi/core/internal.h index 6f80ec3..6f37439 100644 --- a/drivers/bus/mhi/core/internal.h +++ b/drivers/bus/mhi/core/internal.h @@ -619,6 +619,7 @@ int mhi_pm_m3_transition(struct mhi_controller *mhi_cntrl); int __mhi_device_get_sync(struct mhi_controller *mhi_cntrl); int mhi_send_cmd(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan, enum mhi_cmd_type cmd); +int mhi_download_amss_image(struct mhi_controller *mhi_cntrl); static inline bool mhi_is_active(struct mhi_controller *mhi_cntrl) { return (mhi_cntrl->dev_state >= MHI_STATE_M0 && diff --git a/drivers/bus/mhi/core/pm.c b/drivers/bus/mhi/core/pm.c index 8da8806..44aa7eb 100644 --- a/drivers/bus/mhi/core/pm.c +++ b/drivers/bus/mhi/core/pm.c @@ -758,6 +758,8 @@ void mhi_pm_st_worker(struct work_struct *work) * either SBL or AMSS states */ mhi_create_devices(mhi_cntrl); + if (mhi_cntrl->fbc_download) + mhi_download_amss_image(mhi_cntrl); break; case DEV_ST_TRANSITION_MISSION_MODE: mhi_pm_mission_mode_transition(mhi_cntrl); From patchwork Fri Feb 19 23:11:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bhaumik Bhatt X-Patchwork-Id: 385329 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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 D6BA4C433E9 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 A530264EDF for ; 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Fri, 19 Feb 2021 23:11:47 GMT Sender: bbhatt=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 939A8C433CA; Fri, 19 Feb 2021 23:11:47 +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 540BAC43463; Fri, 19 Feb 2021 23:11:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 540BAC43463 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 3/3] bus: mhi: core: Process execution environment changes serially Date: Fri, 19 Feb 2021 15:11:38 -0800 Message-Id: <1613776298-35560-4-git-send-email-bbhatt@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1613776298-35560-1-git-send-email-bbhatt@codeaurora.org> References: <1613776298-35560-1-git-send-email-bbhatt@codeaurora.org> Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org In current design, whenever the BHI interrupt is fired, the execution environment is updated. This can cause race conditions and impede ongoing power up/down processing. For example, if a power down is in progress, MHI host updates to a local "disabled" execution environment. If a BHI interrupt fires later, that value gets replaced with one from the BHI EE register. This impacts the controller as it does not expect multiple RDDM execution environment change status callbacks as an example. Another issue would be that the device can enter mission mode and the execution environment is updated, while device creation for SBL channels is still going on due to slower PM state worker thread run, leading to multiple attempts at opening the same channel. We must handle and wait for SYS_ERROR in any case to facilitate clean-up for the controller and handle RDDM. Ensure that EE changes are handled only from appropriate places and occur one after another and handle only PBL modes or RDDM EE changes as critical events directly from the interrupt handler. This also makes sure that we use the correct execution environment to notify the controller driver when the device resets to one of the PBL execution environments. Signed-off-by: Bhaumik Bhatt --- drivers/bus/mhi/core/main.c | 38 +++++++++++++++++++------------------- drivers/bus/mhi/core/pm.c | 5 +++-- 2 files changed, 22 insertions(+), 21 deletions(-) diff --git a/drivers/bus/mhi/core/main.c b/drivers/bus/mhi/core/main.c index 58f1425..c55d6ec 100644 --- a/drivers/bus/mhi/core/main.c +++ b/drivers/bus/mhi/core/main.c @@ -428,7 +428,7 @@ irqreturn_t mhi_intvec_threaded_handler(int irq_number, void *priv) struct device *dev = &mhi_cntrl->mhi_dev->dev; enum mhi_state state = MHI_STATE_MAX; enum mhi_pm_state pm_state = 0; - enum mhi_ee_type ee = 0; + enum mhi_ee_type ee = MHI_EE_MAX; write_lock_irq(&mhi_cntrl->pm_lock); if (!MHI_REG_ACCESS_VALID(mhi_cntrl->pm_state)) { @@ -437,8 +437,7 @@ irqreturn_t mhi_intvec_threaded_handler(int irq_number, void *priv) } state = mhi_get_mhi_state(mhi_cntrl); - ee = mhi_cntrl->ee; - mhi_cntrl->ee = mhi_get_exec_env(mhi_cntrl); + ee = mhi_get_exec_env(mhi_cntrl); dev_dbg(dev, "local ee:%s device ee:%s dev_state:%s\n", TO_MHI_EXEC_STR(mhi_cntrl->ee), TO_MHI_EXEC_STR(ee), TO_MHI_STATE_STR(state)); @@ -450,27 +449,28 @@ irqreturn_t mhi_intvec_threaded_handler(int irq_number, void *priv) } write_unlock_irq(&mhi_cntrl->pm_lock); - /* If device supports RDDM don't bother processing SYS error */ - if (mhi_cntrl->rddm_image) { - /* host may be performing a device power down already */ - if (!mhi_is_active(mhi_cntrl)) - goto exit_intvec; + if (pm_state != MHI_PM_SYS_ERR_DETECT || ee == mhi_cntrl->ee) + goto exit_intvec; - if (mhi_cntrl->ee == MHI_EE_RDDM && mhi_cntrl->ee != ee) { + switch (ee) { + case MHI_EE_RDDM: + /* proceed if power down is not already in progress */ + if (mhi_cntrl->rddm_image && mhi_is_active(mhi_cntrl)) { mhi_cntrl->status_cb(mhi_cntrl, MHI_CB_EE_RDDM); + mhi_cntrl->ee = ee; wake_up_all(&mhi_cntrl->state_event); } - goto exit_intvec; - } - - if (pm_state == MHI_PM_SYS_ERR_DETECT) { + break; + case MHI_EE_PBL: + case MHI_EE_EDL: + case MHI_EE_PTHRU: + mhi_cntrl->status_cb(mhi_cntrl, MHI_CB_FATAL_ERROR); + mhi_cntrl->ee = ee; + /* continue */ + default: + mhi_pm_sys_err_handler(mhi_cntrl); wake_up_all(&mhi_cntrl->state_event); - - /* For fatal errors, we let controller decide next step */ - if (MHI_IN_PBL(ee)) - mhi_cntrl->status_cb(mhi_cntrl, MHI_CB_FATAL_ERROR); - else - mhi_pm_sys_err_handler(mhi_cntrl); + break; } exit_intvec: diff --git a/drivers/bus/mhi/core/pm.c b/drivers/bus/mhi/core/pm.c index 44aa7eb..c870fa8 100644 --- a/drivers/bus/mhi/core/pm.c +++ b/drivers/bus/mhi/core/pm.c @@ -384,14 +384,15 @@ static int mhi_pm_mission_mode_transition(struct mhi_controller *mhi_cntrl) write_lock_irq(&mhi_cntrl->pm_lock); if (MHI_REG_ACCESS_VALID(mhi_cntrl->pm_state)) - mhi_cntrl->ee = mhi_get_exec_env(mhi_cntrl); + ee = mhi_get_exec_env(mhi_cntrl); - if (!MHI_IN_MISSION_MODE(mhi_cntrl->ee)) { + if (!MHI_IN_MISSION_MODE(ee)) { mhi_cntrl->pm_state = MHI_PM_LD_ERR_FATAL_DETECT; write_unlock_irq(&mhi_cntrl->pm_lock); wake_up_all(&mhi_cntrl->state_event); return -EIO; } + mhi_cntrl->ee = ee; write_unlock_irq(&mhi_cntrl->pm_lock); wake_up_all(&mhi_cntrl->state_event);