From patchwork Tue Mar 28 02:27:29 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tinghan Shen X-Patchwork-Id: 13190352 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A6752C77B60 for ; Tue, 28 Mar 2023 02:28:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232576AbjC1C2O (ORCPT ); Mon, 27 Mar 2023 22:28:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55678 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232536AbjC1C2K (ORCPT ); Mon, 27 Mar 2023 22:28:10 -0400 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DFE47196; Mon, 27 Mar 2023 19:28:04 -0700 (PDT) X-UUID: 26742d66cd1011edb6b9f13eb10bd0fe-20230328 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=5fc5VKu5pwtacTmVqJcZvafVocVzGr7YjsffATNdVkU=; b=t9iPDRM9YKRANIUbiFrjcJnbUOCobyXsxMhUpfilASEn2YOuGt7fddFEbxq6JT34iUKNkGXdZEjGW2eL1hJf54ylIpe5hLqII151rR4TFBt8Y0o6sbLqqedNgjAs/VSYWkxMNfu/cKLodw7UgW/AebVXz8jeeG3QGoVM/Yw12bw=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.22,REQID:570fa70e-7af1-4f64-a8e4-39d2b7510589,IP:0,U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:95,FILE:0,BULK:0,RULE:Release_Ham,ACTION :release,TS:95 X-CID-INFO: VERSION:1.1.22,REQID:570fa70e-7af1-4f64-a8e4-39d2b7510589,IP:0,URL :0,TC:0,Content:0,EDM:0,RT:0,SF:95,FILE:0,BULK:0,RULE:Spam_GS981B3D,ACTION :quarantine,TS:95 X-CID-META: VersionHash:120426c,CLOUDID:e19a1bf7-ddba-41c3-91d9-10eeade8eac7,B ulkID:230328102759EWVX0FV7,BulkQuantity:0,Recheck:0,SF:38|29|28|17|19|48,T C:nil,Content:0,EDM:-3,IP:nil,URL:0,File:nil,Bulk:nil,QS:nil,BEC:nil,COL:0 ,OSI:0,OSA:0,AV:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-UUID: 26742d66cd1011edb6b9f13eb10bd0fe-20230328 Received: from mtkmbs10n1.mediatek.inc [(172.21.101.34)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 2075299968; Tue, 28 Mar 2023 10:27:56 +0800 Received: from mtkmbs11n1.mediatek.inc (172.21.101.185) by mtkmbs10n2.mediatek.inc (172.21.101.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.25; Tue, 28 Mar 2023 10:27:55 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs11n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.25 via Frontend Transport; Tue, 28 Mar 2023 10:27:55 +0800 From: Tinghan Shen To: Bjorn Andersson , Mathieu Poirier , Rob Herring , "Krzysztof Kozlowski" , Matthias Brugger , AngeloGioacchino Del Regno , Tinghan Shen CC: , , , , , Subject: [PATCH v9 07/11] remoteproc: mediatek: Control SCP core 1 by rproc subdevice Date: Tue, 28 Mar 2023 10:27:29 +0800 Message-ID: <20230328022733.29910-8-tinghan.shen@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20230328022733.29910-1-tinghan.shen@mediatek.com> References: <20230328022733.29910-1-tinghan.shen@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org Register SCP core 1 as a subdevice of core 0 for the boot sequence and watchdog timeout handling. The core 1 has to boot after core 0 because the SCP clock and SRAM power is controlled by SCP core 0. As for watchdog timeout handling, the remoteproc framework helps to stop/start subdevices automatically when SCP driver receives watchdog timeout event. Signed-off-by: Tinghan Shen Reviewed-by: AngeloGioacchino Del Regno --- drivers/remoteproc/mtk_common.h | 9 +++++ drivers/remoteproc/mtk_scp.c | 66 +++++++++++++++++++++++++++++++++ 2 files changed, 75 insertions(+) diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h index b73b60c22ea1..f1a021ad7f66 100644 --- a/drivers/remoteproc/mtk_common.h +++ b/drivers/remoteproc/mtk_common.h @@ -100,6 +100,13 @@ struct mtk_scp_of_data { size_t ipi_buf_offset; }; +struct mtk_scp_core_subdev { + struct rproc_subdev subdev; + struct mtk_scp *scp; +}; + +#define to_core_subdev(d) container_of(d, struct mtk_scp_core_subdev, subdev) + struct mtk_scp { struct device *dev; struct rproc *rproc; @@ -131,6 +138,8 @@ struct mtk_scp { struct list_head elem; struct list_head *cluster; + + struct mtk_scp_core_subdev *core_subdev; }; /** diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c index 71882ed31e16..ba931d550c1e 100644 --- a/drivers/remoteproc/mtk_scp.c +++ b/drivers/remoteproc/mtk_scp.c @@ -864,6 +864,60 @@ static void scp_remove_rpmsg_subdev(struct mtk_scp *scp) } } +static int scp_core_subdev_start(struct rproc_subdev *subdev) +{ + struct mtk_scp_core_subdev *core_subdev = to_core_subdev(subdev); + struct mtk_scp *scp = core_subdev->scp; + + rproc_boot(scp->rproc); + + return 0; +} + +static void scp_core_subdev_stop(struct rproc_subdev *subdev, bool crashed) +{ + struct mtk_scp_core_subdev *core_subdev = to_core_subdev(subdev); + struct mtk_scp *scp = core_subdev->scp; + + rproc_shutdown(scp->rproc); +} + +static int scp_core_subdev_register(struct mtk_scp *scp) +{ + struct device *dev = scp->dev; + struct mtk_scp_core_subdev *core_subdev; + struct mtk_scp *scp_c0; + + scp_c0 = list_first_entry(scp->cluster, struct mtk_scp, elem); + if (!scp_c0) + return -ENODATA; + + core_subdev = devm_kzalloc(dev, sizeof(*core_subdev), GFP_KERNEL); + if (!core_subdev) + return -ENOMEM; + + core_subdev->scp = scp; + core_subdev->subdev.start = scp_core_subdev_start; + core_subdev->subdev.stop = scp_core_subdev_stop; + + scp->core_subdev = core_subdev; + rproc_add_subdev(scp_c0->rproc, &scp->core_subdev->subdev); + + return 0; +} + +static void scp_core_subdev_unregister(struct mtk_scp *scp) +{ + struct mtk_scp *scp_c0; + + if (scp->core_subdev) { + scp_c0 = list_first_entry(scp->cluster, struct mtk_scp, elem); + rproc_remove_subdev(scp_c0->rproc, &scp->core_subdev->subdev); + devm_kfree(scp->dev, scp->core_subdev); + scp->core_subdev = NULL; + } +} + static int scp_rproc_init(struct platform_device *pdev, struct mtk_scp_of_regs *of_regs, const struct mtk_scp_of_data *of_data) @@ -955,6 +1009,7 @@ static void scp_rproc_free(struct mtk_scp *scp) { int i; + scp_core_subdev_unregister(scp); scp_remove_rpmsg_subdev(scp); scp_ipi_unregister(scp, SCP_IPI_INIT); scp_unmap_memory_region(scp); @@ -1034,6 +1089,17 @@ static int scp_cluster_init(struct platform_device *pdev, } list_for_each_entry_safe_reverse(scp, temp, cluster, elem) { + if (!list_is_first(&scp->elem, cluster)) { + ret = scp_core_subdev_register(scp); + if (ret) { + dev_err_probe(scp->dev, ret, "Failed to register as subdev\n"); + goto add_fail; + } + + /* sub cores are booted as subdevices of core 0 */ + scp->rproc->auto_boot = false; + } + ret = rproc_add(scp->rproc); if (ret) goto add_fail;