From patchwork Mon Feb 13 03:37:54 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tinghan Shen X-Patchwork-Id: 13137800 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 82DAEC636D7 for ; Mon, 13 Feb 2023 03:41:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=xcixY8hTehS8LKpVcAKUoH6UZpAGg8m1WoNwMhLA35g=; b=0c92N/kn9w8GGA TUQ9vPjgDil8/vd1UrQv2OweCtqpXz1rjNAHDJcGm84nibuoVhsvdRZovV83ohIXEIErxxVVhzc+w DWF84LT7lfJLnjuYn/9oubMRR4H+wAJ35uicJ5ngxOjZJP5whv9FPBCUqTTlfAXBOqsmq6n1J4W/B eoBwEUT/GnN8DKNFCSfRMVy6PBYfXTGPHVJOaYDNfF6D/3sGD1i+AhXmjpKHmHMzY57/Vk9LgaQJ2 Q/Bvs9leSa8zZReQojWCjHEjaAcb/zo6OmGd42uR/tb0b2AEncsyxYtGRA+55i33CKxGL+Yx5Wq/x rxw1oNrXfVl1wfQcSyhA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pRPhx-00Cz8g-Jy; Mon, 13 Feb 2023 03:40:51 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1pRPfz-00Cxzi-OL; Mon, 13 Feb 2023 03:38:51 +0000 X-UUID: e757fb76ab4f11edbbe3f76fe852e059-20230212 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=zTQSKAt6/ITBhx0Lj+iP18sxdOpw2FhE91TsAsCit5I=; b=TWHvivKJsBIJaxjqHratEqcWT2ZojOf/XxSDKIW4qPF9s+NGg0rA+4Gr/U1VCeF5gChrZ+GCoBG+qtBzscnyffXwE7jNasxBf3GpjxVlq8t4aJurBM9eatFKrgXoHKclgXjn0YWFp62HMXnfb4Lvf+nroGWpmSwaNi0NaFpeteI=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.19,REQID:ebd1b028-09aa-4942-9c13-2ba320e95226,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:885ddb2,CLOUDID:16d21257-dd49-462e-a4be-2143a3ddc739,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,NGT X-UUID: e757fb76ab4f11edbbe3f76fe852e059-20230212 Received: from mtkmbs11n2.mediatek.inc [(172.21.101.187)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 802731329; Sun, 12 Feb 2023 20:38:39 -0700 Received: from mtkmbs13n2.mediatek.inc (172.21.101.194) by mtkmbs10n1.mediatek.inc (172.21.101.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.792.15; Mon, 13 Feb 2023 11:38:03 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs13n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.792.15 via Frontend Transport; Mon, 13 Feb 2023 11:38:03 +0800 From: Tinghan Shen To: Bjorn Andersson , Mathieu Poirier , Rob Herring , "Krzysztof Kozlowski" , Matthias Brugger , AngeloGioacchino Del Regno , Tinghan Shen CC: , , , , , Subject: [PATCH v6 08/12] remoteproc: mediatek: Control SCP core 1 by rproc subdevice Date: Mon, 13 Feb 2023 11:37:54 +0800 Message-ID: <20230213033758.16681-9-tinghan.shen@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20230213033758.16681-1-tinghan.shen@mediatek.com> References: <20230213033758.16681-1-tinghan.shen@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230212_193847_909778_50142A70 X-CRM114-Status: GOOD ( 15.21 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.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 | 8 ++++ drivers/remoteproc/mtk_scp.c | 66 +++++++++++++++++++++++++++++++++ 2 files changed, 74 insertions(+) diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h index 635b17676de8..47c06882880c 100644 --- a/drivers/remoteproc/mtk_common.h +++ b/drivers/remoteproc/mtk_common.h @@ -116,6 +116,13 @@ struct mtk_scp_cluster { struct list_head cores; }; +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; @@ -147,6 +154,7 @@ struct mtk_scp { struct list_head elem; struct mtk_scp_cluster *cluster; + struct mtk_scp_core_subdev *core_subdev; }; /** diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c index fd054a06ea5b..f1943b2457f9 100644 --- a/drivers/remoteproc/mtk_scp.c +++ b/drivers/remoteproc/mtk_scp.c @@ -861,6 +861,60 @@ 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->cores, 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->cores, 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, @@ -961,6 +1015,7 @@ 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); @@ -1025,6 +1080,17 @@ static int scp_cluster_init(struct platform_device *pdev, } list_for_each_entry_safe_reverse(scp, temp, &cluster->cores, elem) { + if (!list_is_first(&scp->elem, &scp->cluster->cores)) { + 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;