From patchwork Thu May 21 15:25:31 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam X-Patchwork-Id: 189050 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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, 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 1375AC433E1 for ; Thu, 21 May 2020 15:26:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E3C09207F7 for ; Thu, 21 May 2020 15:26:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1590074780; bh=Kpuuv4zdUqvxPGRQ8qDzw7NY8a29xJgZhj2zLKNQu4A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=iirPSzOY28Q5khCORpFvGTK8GWA+7IVEy16WIWeb+jilV9zwtJAH0lhmOB71lBGul Gb1GeUxlS4hq+z20x4I7hiwNVjYvXFO8UJxFPwimrJkQ26/57NDBdFt1Yjw2kk2B4M DUArWCm1EWVWMNpTbtBsUHgMt4LQ2EKvphF4C6OQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730170AbgEUP0T (ORCPT ); Thu, 21 May 2020 11:26:19 -0400 Received: from mail.kernel.org ([198.145.29.99]:34324 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730156AbgEUP0Q (ORCPT ); Thu, 21 May 2020 11:26:16 -0400 Received: from localhost.localdomain (unknown [157.51.235.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1ED45204EA; Thu, 21 May 2020 15:26:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1590074775; bh=Kpuuv4zdUqvxPGRQ8qDzw7NY8a29xJgZhj2zLKNQu4A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TlYSDxIBnxWNoj1DWUjj0ZQRtSKMqGs5Rrg1Hq+ECSiIOGlGBXS8BU9Hfcm5a6sCa jF4XXTcNEbcw0/h8XN152IUyefFzEyMUNT5qXYxLICwOuj+63uq9sAewI+HbYFUiZp JmSzbNhoUexQjUbA/YLCW3kncUtZF14SPW91bhE4= From: mani@kernel.org To: gregkh@linuxfoundation.org Cc: hemantk@codeaurora.org, jhugo@codeaurora.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, Bhaumik Bhatt , Manivannan Sadhasivam Subject: [PATCH 05/14] bus: mhi: core: Handle firmware load using state worker Date: Thu, 21 May 2020 20:55:31 +0530 Message-Id: <20200521152540.17335-6-mani@kernel.org> X-Mailer: git-send-email 2.26.GIT In-Reply-To: <20200521152540.17335-1-mani@kernel.org> References: <20200521152540.17335-1-mani@kernel.org> MIME-Version: 1.0 Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Bhaumik Bhatt Upon power up, driver queues firmware worker thread if the execution environment is PBL. Firmware worker is blocked with a timeout until state worker gets a chance to run and unblock firmware worker. An endpoint power up failure can be seen if state worker gets a chance to run after firmware worker has timed out. Remove this dependency and handle firmware load directly using state worker thread. Signed-off-by: Bhaumik Bhatt Reviewed-by: Jeffrey Hugo Reviewed-by: Manivannan Sadhasivam Signed-off-by: Manivannan Sadhasivam --- drivers/bus/mhi/core/boot.c | 18 +++--------------- drivers/bus/mhi/core/init.c | 1 - drivers/bus/mhi/core/internal.h | 1 + drivers/bus/mhi/core/pm.c | 6 +----- include/linux/mhi.h | 2 -- 5 files changed, 5 insertions(+), 23 deletions(-) diff --git a/drivers/bus/mhi/core/boot.c b/drivers/bus/mhi/core/boot.c index ebad5eb48e5a..17c636b4bc6e 100644 --- a/drivers/bus/mhi/core/boot.c +++ b/drivers/bus/mhi/core/boot.c @@ -377,30 +377,18 @@ static void mhi_firmware_copy(struct mhi_controller *mhi_cntrl, } } -void mhi_fw_load_worker(struct work_struct *work) +void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl) { - struct mhi_controller *mhi_cntrl; const struct firmware *firmware = NULL; struct image_info *image_info; - struct device *dev; + struct device *dev = &mhi_cntrl->mhi_dev->dev; const char *fw_name; void *buf; dma_addr_t dma_addr; size_t size; int ret; - mhi_cntrl = container_of(work, struct mhi_controller, fw_worker); - dev = &mhi_cntrl->mhi_dev->dev; - - dev_dbg(dev, "Waiting for device to enter PBL from: %s\n", - TO_MHI_EXEC_STR(mhi_cntrl->ee)); - - ret = wait_event_timeout(mhi_cntrl->state_event, - MHI_IN_PBL(mhi_cntrl->ee) || - 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)) { + if (MHI_PM_IN_ERROR_STATE(mhi_cntrl->pm_state)) { dev_err(dev, "Device MHI is not in valid state\n"); return; } diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c index 1a93d24efffc..6882206ad80e 100644 --- a/drivers/bus/mhi/core/init.c +++ b/drivers/bus/mhi/core/init.c @@ -835,7 +835,6 @@ int mhi_register_controller(struct mhi_controller *mhi_cntrl, spin_lock_init(&mhi_cntrl->wlock); INIT_WORK(&mhi_cntrl->st_worker, mhi_pm_st_worker); INIT_WORK(&mhi_cntrl->syserr_worker, mhi_pm_sys_err_worker); - INIT_WORK(&mhi_cntrl->fw_worker, mhi_fw_load_worker); init_waitqueue_head(&mhi_cntrl->state_event); mhi_cmd = mhi_cntrl->mhi_cmd; diff --git a/drivers/bus/mhi/core/internal.h b/drivers/bus/mhi/core/internal.h index 40c47f918ca3..0965ca3c9632 100644 --- a/drivers/bus/mhi/core/internal.h +++ b/drivers/bus/mhi/core/internal.h @@ -627,6 +627,7 @@ int mhi_init_irq_setup(struct mhi_controller *mhi_cntrl); void mhi_deinit_free_irq(struct mhi_controller *mhi_cntrl); void mhi_rddm_prepare(struct mhi_controller *mhi_cntrl, struct image_info *img_info); +void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl); int mhi_prepare_channel(struct mhi_controller *mhi_cntrl, struct mhi_chan *mhi_chan); int mhi_init_chan_ctxt(struct mhi_controller *mhi_cntrl, diff --git a/drivers/bus/mhi/core/pm.c b/drivers/bus/mhi/core/pm.c index dc83d65f7784..6d56441013af 100644 --- a/drivers/bus/mhi/core/pm.c +++ b/drivers/bus/mhi/core/pm.c @@ -528,7 +528,6 @@ static void mhi_pm_disable_transition(struct mhi_controller *mhi_cntrl, dev_dbg(dev, "Waiting for all pending threads to complete\n"); wake_up_all(&mhi_cntrl->state_event); flush_work(&mhi_cntrl->st_worker); - flush_work(&mhi_cntrl->fw_worker); dev_dbg(dev, "Reset all active channels and remove MHI devices\n"); device_for_each_child(mhi_cntrl->cntrl_dev, NULL, mhi_destroy_device); @@ -643,7 +642,7 @@ void mhi_pm_st_worker(struct work_struct *work) mhi_cntrl->ee = mhi_get_exec_env(mhi_cntrl); write_unlock_irq(&mhi_cntrl->pm_lock); if (MHI_IN_PBL(mhi_cntrl->ee)) - wake_up_all(&mhi_cntrl->state_event); + mhi_fw_load_handler(mhi_cntrl); break; case DEV_ST_TRANSITION_SBL: write_lock_irq(&mhi_cntrl->pm_lock); @@ -833,9 +832,6 @@ int mhi_async_power_up(struct mhi_controller *mhi_cntrl) next_state = MHI_IN_PBL(current_ee) ? DEV_ST_TRANSITION_PBL : DEV_ST_TRANSITION_READY; - if (next_state == DEV_ST_TRANSITION_PBL) - schedule_work(&mhi_cntrl->fw_worker); - mhi_queue_state_transition(mhi_cntrl, next_state); mutex_unlock(&mhi_cntrl->pm_mutex); diff --git a/include/linux/mhi.h b/include/linux/mhi.h index 3d7c3c26eeb9..a60312927b4d 100644 --- a/include/linux/mhi.h +++ b/include/linux/mhi.h @@ -331,7 +331,6 @@ struct mhi_controller_config { * @wlock: Lock for protecting device wakeup * @mhi_link_info: Device bandwidth info * @st_worker: State transition worker - * @fw_worker: Firmware download worker * @syserr_worker: System error worker * @state_event: State change event * @status_cb: CB function to notify power states of the device (required) @@ -412,7 +411,6 @@ struct mhi_controller { spinlock_t wlock; struct mhi_link_info mhi_link_info; struct work_struct st_worker; - struct work_struct fw_worker; struct work_struct syserr_worker; wait_queue_head_t state_event;