From patchwork Wed May 10 06:37:45 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tinghan Shen X-Patchwork-Id: 13236537 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 28F1BC7EE24 for ; Wed, 10 May 2023 06:38:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:MIME-Version: References:In-Reply-To:Message-ID:Date:Subject:CC:To:From:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=/2HwQXP5gcxmFdmc9DZ5hDZ3MeFnNJZxYWYbN2vHeWc=; b=Ik6XK8samd7Z/IZoQpWQGMGEOi 6UyJc+cWHJlpxU1FeX9EbthTchw84L6TUhBeXlIdaKDCakgH8spmQQKo++q9N74P6aDg22+uW/c1e TO5z6jVtdq3I2Fj4f+kp3HQomTB41HBUOAtuYYAxwKKYeB7VVoopSSkw0z4EGDOdoBoevyzvYU493 1RvPet5N+tbhwk6ukF3qui8eIDZDWQPecEB1IweEMSvoPujdoUpa4r37Wwg+NesQWNoAJgjFYYFcs X449EOAXC0KG3UCPTE0iLNDLqiAbiNbKD8irvXOT7UTUHXPznPAvvGNqzgHeWOqVnfRb4eHq4n1N5 83jy66sg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pwdTK-005Gdx-1M; Wed, 10 May 2023 06:38:46 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1pwdTF-005GYl-0T; Wed, 10 May 2023 06:38:43 +0000 X-UUID: 4894a74aeefd11ed912e1518a6540028-20230509 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:83f89b0e-8d3b-4c76-ac92-b999c15c3b46,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:c7215dc0-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: 4894a74aeefd11ed912e1518a6540028-20230509 Received: from mtkmbs13n2.mediatek.inc [(172.21.101.108)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1698982518; Tue, 09 May 2023 23:38:33 -0700 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230509_233841_186542_CE4D6896 X-CRM114-Status: GOOD ( 17.42 ) X-BeenThere: linux-mediatek@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-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=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 | 9 +++++ drivers/remoteproc/mtk_scp.c | 68 +++++++++++++++++++++++++++++++++ 2 files changed, 77 insertions(+) diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.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; }; +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; @@ -130,6 +137,8 @@ struct mtk_scp { struct rproc_subdev *rpmsg_subdev; 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 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 *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 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; + 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 *pdev) return PTR_ERR(scp); list_add_tail(&scp->elem, cluster); + scp->cluster = cluster; } else { dev_dbg(dev, "multi-core scp\n"); @@ -1038,6 +1094,7 @@ static int scp_cluster_init(struct platform_device *pdev) goto init_fail; } list_add_tail(&scp->elem, cluster); + scp->cluster = cluster; put_device(&cpdev->dev); core_id++; @@ -1045,6 +1102,17 @@ 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;