From nobody Fri Sep 20 20:36:30 2024 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 A6E56C77B7C for ; Wed, 10 May 2023 06:38:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236128AbjEJGi3 (ORCPT ); Wed, 10 May 2023 02:38:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40992 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236017AbjEJGiM (ORCPT ); Wed, 10 May 2023 02:38:12 -0400 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E5DB44486; Tue, 9 May 2023 23:38:04 -0700 (PDT) X-UUID: 349a51aeeefd11edb20a276fd37b9834-20230510 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=/2HwQXP5gcxmFdmc9DZ5hDZ3MeFnNJZxYWYbN2vHeWc=; b=TXNAWZoNmGE8M0hRlYhqIVWg/6Mp59EuzX/6fmLzn6t3h6IR0dEQujS2q55n/XrQ4CD7+wzyhEsXH6tygcSDpPek9nHLxcQiaWkRKY330f/RqwlsVHwv6R7zdJfqEsIDloh1iqYW0OTWB48mTlMhGtY7jUDD83aZ3WsR1Ta+XSc=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.24,REQID:926fc43e-f9f6-43f3-bfcb-0b6eab9d28c9,IP:0,U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION: release,TS:0 X-CID-META: VersionHash:178d4d4,CLOUDID:5dd9b03a-de1e-4348-bc35-c96f92f1dcbb,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL: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: 349a51aeeefd11edb20a276fd37b9834-20230510 Received: from mtkmbs11n2.mediatek.inc [(172.21.101.187)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 9349902; Wed, 10 May 2023 14:37:59 +0800 Received: from mtkmbs13n1.mediatek.inc (172.21.101.194) by mtkmbs13n2.mediatek.inc (172.21.101.108) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Wed, 10 May 2023 14:37:58 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs13n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Wed, 10 May 2023 14:37:58 +0800 From: Tinghan Shen To: Bjorn Andersson , Mathieu Poirier , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Matthias Brugger , AngeloGioacchino Del Regno , Tinghan Shen CC: , , , , , Subject: [PATCH v11 07/11] remoteproc: mediatek: Control SCP core 1 by rproc subdevice Date: Wed, 10 May 2023 14:37:45 +0800 Message-ID: <20230510063749.5127-8-tinghan.shen@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20230510063749.5127-1-tinghan.shen@mediatek.com> References: <20230510063749.5127-1-tinghan.shen@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 | 68 +++++++++++++++++++++++++++++++++ 2 files changed, 77 insertions(+) diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_commo= n.h index 56395e8664cb..85afed2e6928 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; }; =20 +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, subd= ev) + struct mtk_scp { struct device *dev; struct rproc *rproc; @@ -130,6 +137,8 @@ struct mtk_scp { struct rproc_subdev *rpmsg_subdev; =20 struct list_head elem; + struct list_head *cluster; + struct mtk_scp_core_subdev *core_subdev; }; =20 /** diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c index 87215a0e145e..a88fdd46f614 100644 --- a/drivers/remoteproc/mtk_scp.c +++ b/drivers/remoteproc/mtk_scp.c @@ -863,6 +863,60 @@ static void scp_remove_rpmsg_subdev(struct mtk_scp *sc= p) } } =20 +static int scp_core_subdev_start(struct rproc_subdev *subdev) +{ + struct mtk_scp_core_subdev *core_subdev =3D to_core_subdev(subdev); + struct mtk_scp *scp =3D 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 =3D to_core_subdev(subdev); + struct mtk_scp *scp =3D core_subdev->scp; + + rproc_shutdown(scp->rproc); +} + +static int scp_core_subdev_register(struct mtk_scp *scp) +{ + struct device *dev =3D scp->dev; + struct mtk_scp_core_subdev *core_subdev; + struct mtk_scp *scp_c0; + + scp_c0 =3D list_first_entry(scp->cluster, struct mtk_scp, elem); + if (!scp_c0) + return -ENODATA; + + core_subdev =3D devm_kzalloc(dev, sizeof(*core_subdev), GFP_KERNEL); + if (!core_subdev) + return -ENOMEM; + + core_subdev->scp =3D scp; + core_subdev->subdev.start =3D scp_core_subdev_start; + core_subdev->subdev.stop =3D scp_core_subdev_stop; + + scp->core_subdev =3D 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 =3D 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 =3D NULL; + } +} + static struct mtk_scp *scp_rproc_init(struct platform_device *pdev, struct mtk_scp_of_cluster *scp_cluster, const struct mtk_scp_of_data *of_data) @@ -957,6 +1011,7 @@ static void scp_rproc_free(struct mtk_scp *scp) { int i; =20 + scp_core_subdev_unregister(scp); scp_remove_rpmsg_subdev(scp); scp_ipi_unregister(scp, SCP_IPI_INIT); scp_unmap_memory_region(scp); @@ -1009,6 +1064,7 @@ static int scp_cluster_init(struct platform_device *p= dev) return PTR_ERR(scp); =20 list_add_tail(&scp->elem, cluster); + scp->cluster =3D cluster; } else { dev_dbg(dev, "multi-core scp\n"); =20 @@ -1038,6 +1094,7 @@ static int scp_cluster_init(struct platform_device *p= dev) goto init_fail; } list_add_tail(&scp->elem, cluster); + scp->cluster =3D cluster; put_device(&cpdev->dev); =20 core_id++; @@ -1045,6 +1102,17 @@ static int scp_cluster_init(struct platform_device *= pdev) } =20 list_for_each_entry_safe_reverse(scp, temp, cluster, elem) { + if (!list_is_first(&scp->elem, cluster)) { + ret =3D 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 =3D false; + } + ret =3D rproc_add(scp->rproc); if (ret) goto add_fail; --=20 2.18.0