From nobody Fri Sep 20 20:36:19 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 4EB1DC77B7C for ; Wed, 10 May 2023 06:38:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235998AbjEJGii (ORCPT ); Wed, 10 May 2023 02:38:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41012 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236035AbjEJGiN (ORCPT ); Wed, 10 May 2023 02:38:13 -0400 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5BDE644A1; Tue, 9 May 2023 23:38:07 -0700 (PDT) X-UUID: 3425a05ceefd11ed9cb5633481061a41-20230510 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=mFRMkL33UOETAVOWCaS6Si51BlFUJ5cVoWg7L4hvcaM=; b=UgbRFfj1hILivfNtZ0GWxCAKH9Yyouk3nRWhAJqZp+LO8hqKuqufN6dF9MM7e4W9j/I2PCjqFX0AsK+4Ex7TYB3k/MaYJMO8nj/iSOos1NSOdqmsewrbsCsAKBQoNXEx7xxVepK6MEjxScCIuAgrgaJRklFODXJEQwkBQeasjlA=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.24,REQID:ef28d209-6d04-40fd-8696-a9483189d43f,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:c11c5dc0-e32c-4c97-918d-fbb3fc224d4e,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: 3425a05ceefd11ed9cb5633481061a41-20230510 Received: from mtkmbs10n2.mediatek.inc [(172.21.101.183)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 2146491142; Wed, 10 May 2023 14:37:58 +0800 Received: from mtkmbs13n1.mediatek.inc (172.21.101.194) by mtkmbs11n2.mediatek.inc (172.21.101.187) 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 14:37:57 +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 14:37:57 +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 06/11] remoteproc: mediatek: Probe multi-core SCP Date: Wed, 10 May 2023 14:37:44 +0800 Message-ID: <20230510063749.5127-7-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" The difference of single-core SCP and multi-core SCP device tree is the presence of child device nodes described SCP cores. The SCP driver populates the platform device and checks the child nodes to identify whether it's a single-core SCP or a multi-core SCP. Add the remoteproc instances of multi-core SCP to the SCP cluster list. When the SCP driver is removed, it cleanup resources by walking through the cluster list. Signed-off-by: Tinghan Shen --- drivers/remoteproc/mtk_scp.c | 135 ++++++++++++++++++++++++++++++----- 1 file changed, 117 insertions(+), 18 deletions(-) diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c index ff73c6dd9637..87215a0e145e 100644 --- a/drivers/remoteproc/mtk_scp.c +++ b/drivers/remoteproc/mtk_scp.c @@ -864,7 +864,8 @@ static void scp_remove_rpmsg_subdev(struct mtk_scp *scp) } =20 static struct mtk_scp *scp_rproc_init(struct platform_device *pdev, - struct mtk_scp_of_cluster *scp_cluster) + struct mtk_scp_of_cluster *scp_cluster, + const struct mtk_scp_of_data *of_data) { struct device *dev =3D &pdev->dev; struct device_node *np =3D dev->of_node; @@ -887,7 +888,7 @@ static struct mtk_scp *scp_rproc_init(struct platform_d= evice *pdev, scp =3D rproc->priv; scp->rproc =3D rproc; scp->dev =3D dev; - scp->data =3D of_device_get_match_data(dev); + scp->data =3D of_data; platform_device_add_data(pdev, &scp, sizeof(scp)); =20 scp->reg_base =3D scp_cluster->reg_base; @@ -938,10 +939,6 @@ static struct mtk_scp *scp_rproc_init(struct platform_= device *pdev, goto remove_subdev; } =20 - ret =3D rproc_add(rproc); - if (ret) - goto remove_subdev; - return scp; =20 remove_subdev: @@ -956,19 +953,116 @@ static struct mtk_scp *scp_rproc_init(struct platfor= m_device *pdev, return ERR_PTR(ret); } =20 +static void scp_rproc_free(struct mtk_scp *scp) +{ + int i; + + scp_remove_rpmsg_subdev(scp); + scp_ipi_unregister(scp, SCP_IPI_INIT); + scp_unmap_memory_region(scp); + for (i =3D 0; i < SCP_IPI_MAX; i++) + mutex_destroy(&scp->ipi_desc[i].lock); + mutex_destroy(&scp->send_lock); +} + +static int scp_is_single_core(struct platform_device *pdev) +{ + struct device *dev =3D &pdev->dev; + struct device_node *np =3D dev_of_node(dev); + struct device_node *child; + + child =3D of_get_next_available_child(np, NULL); + if (!child) + return dev_err_probe(dev, -ENODEV, "No child node\n"); + + of_node_put(child); + return of_node_name_eq(child, "cros-ec-rpmsg"); +} + static int scp_cluster_init(struct platform_device *pdev) { - struct mtk_scp *scp; + struct mtk_scp *scp, *temp; struct mtk_scp_of_cluster *scp_cluster =3D platform_get_drvdata(pdev); struct list_head *cluster =3D &scp_cluster->mtk_scp_cluster; =20 - scp =3D scp_rproc_init(pdev, scp_cluster); - if (IS_ERR(scp)) - return PTR_ERR(scp); + struct device *dev =3D &pdev->dev; + struct device_node *np =3D dev_of_node(dev); + struct platform_device *cpdev; + struct device_node *child; + const struct mtk_scp_of_data **cluster_of_data; + int core_id =3D 0; + int ret; + + ret =3D scp_is_single_core(pdev); + if (ret < 0) + return ret; + + if (ret) { + dev_dbg(dev, "single-core scp\n"); + + /* When using the SCP node phandle on exported SCP APIs, the drvdata + * is expected to be the mtk_scp object, and as a result, it is intended + * to be overwritten for single-core SCP usage. + */ + scp =3D scp_rproc_init(pdev, scp_cluster, of_device_get_match_data(dev)); + if (IS_ERR(scp)) + return PTR_ERR(scp); + + list_add_tail(&scp->elem, cluster); + } else { + dev_dbg(dev, "multi-core scp\n"); + + cluster_of_data =3D (const struct mtk_scp_of_data **)of_device_get_match= _data(dev); + + for_each_available_child_of_node(np, child) { + if (!cluster_of_data[core_id]) { + ret =3D -EINVAL; + dev_err(dev, "Not support core %d\n", core_id); + of_node_put(child); + goto init_fail; + } + + cpdev =3D of_find_device_by_node(child); + if (!cpdev) { + ret =3D -ENODEV; + dev_err(dev, "Not found platform device for core %d\n", core_id); + of_node_put(child); + goto init_fail; + } + + scp =3D scp_rproc_init(cpdev, scp_cluster, cluster_of_data[core_id]); + if (IS_ERR(scp)) { + dev_err(dev, "Failed to initialize core %d rproc\n", core_id); + put_device(&cpdev->dev); + of_node_put(child); + goto init_fail; + } + list_add_tail(&scp->elem, cluster); + put_device(&cpdev->dev); + + core_id++; + } + } =20 - list_add_tail(&scp->elem, cluster); + list_for_each_entry_safe_reverse(scp, temp, cluster, elem) { + ret =3D rproc_add(scp->rproc); + if (ret) + goto add_fail; + } =20 return 0; + +add_fail: + list_for_each_entry_continue(scp, cluster, elem) { + rproc_del(scp->rproc); + } +init_fail: + list_for_each_entry_safe_reverse(scp, temp, cluster, elem) { + list_del(&scp->elem); + scp_rproc_free(scp); + } + + return ret; } =20 static int scp_probe(struct platform_device *pdev) @@ -1005,6 +1099,10 @@ static int scp_probe(struct platform_device *pdev) INIT_LIST_HEAD(&scp_cluster->mtk_scp_cluster); platform_set_drvdata(pdev, scp_cluster); =20 + ret =3D devm_of_platform_populate(dev); + if (ret) + return dev_err_probe(dev, ret, "Failed to populate platform devices\n"); + ret =3D scp_cluster_init(pdev); if (ret) return ret; @@ -1016,17 +1114,11 @@ static int scp_remove(struct platform_device *pdev) { struct mtk_scp_of_cluster *scp_cluster =3D platform_get_drvdata(pdev); struct mtk_scp *scp, *temp; - int i; =20 list_for_each_entry_safe_reverse(scp, temp, &scp_cluster->mtk_scp_cluster= , elem) { list_del(&scp->elem); rproc_del(scp->rproc); - scp_remove_rpmsg_subdev(scp); - scp_ipi_unregister(scp, SCP_IPI_INIT); - scp_unmap_memory_region(scp); - for (i =3D 0; i < SCP_IPI_MAX; i++) - mutex_destroy(&scp->ipi_desc[i].lock); - mutex_destroy(&scp->send_lock); + scp_rproc_free(scp); } =20 return 0; @@ -1106,12 +1198,19 @@ static const struct mtk_scp_of_data mt8195_of_data_= c1 =3D { .host_to_scp_int_bit =3D MT8195_CORE1_HOST_IPC_INT_BIT, }; =20 +static const struct mtk_scp_of_data *mt8195_of_data_cores[] =3D { + &mt8195_of_data, + &mt8195_of_data_c1, + NULL +}; + static const struct of_device_id mtk_scp_of_match[] =3D { { .compatible =3D "mediatek,mt8183-scp", .data =3D &mt8183_of_data }, { .compatible =3D "mediatek,mt8186-scp", .data =3D &mt8186_of_data }, { .compatible =3D "mediatek,mt8188-scp", .data =3D &mt8188_of_data }, { .compatible =3D "mediatek,mt8192-scp", .data =3D &mt8192_of_data }, { .compatible =3D "mediatek,mt8195-scp", .data =3D &mt8195_of_data }, + { .compatible =3D "mediatek,mt8195-scp-dual", .data =3D &mt8195_of_data_c= ores }, {}, }; MODULE_DEVICE_TABLE(of, mtk_scp_of_match); --=20 2.18.0