From patchwork Wed Jun 8 08:35:51 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tinghan Shen X-Patchwork-Id: 12873063 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 43589C43334 for ; Wed, 8 Jun 2022 08:59:37 +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=z9KQ1tlH9zcz65ftaxODuZAY5VoOscfEG0FmP4B8iic=; b=pwhOqgoB9w8bpD 11/rMz0RFytihq4q9AckTe4GSZp7B5mf7y7gdpeb0Dsv7x6Y/Bpzyg3uNtJjU3j+Ykz8Qzehfcaeh V4Z6Ul/ksqL0K2MAIyLM3qggiSGhKHuseARXfgaluwKoqRM8jcrr6WY6NMrGYBhd75dTVtXQSY/VG MXJV7Vh25x4xmjCArCEdWSp7A/WE40aGJOp7JPjUtf67nZeBywky9cLxYQ/xlrr0tA+jYXo7BL+61 8jSMED8I99xa4bR4dBjBxnniBkNh30nabfq0NHui+xSlAGor/ZSYDO8PLokW1fiEAn+2sX+R2tIow gNYwK6iq9QyH3cpF42nQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nyrW3-00C9mi-Hi; Wed, 08 Jun 2022 08:58:16 +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 1nyrJx-00C4SX-7q; Wed, 08 Jun 2022 08:45:47 +0000 X-UUID: 6e3fe084f58d4fe5b88f59aea670c5b3-20220608 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.5,REQID:195d6877-a194-49f1-a439-1b1e63876065,OB:0,LO B:0,IP:0,URL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,RULE:Release_Ham,ACTI ON:release,TS:0 X-CID-META: VersionHash:2a19b09,CLOUDID:7001a07e-c8dc-403a-96e8-6237210dceee,C OID:IGNORED,Recheck:0,SF:nil,TC:nil,Content:0,EDM:-3,IP:nil,URL:0,File:nil ,QS:0,BEC:nil X-UUID: 6e3fe084f58d4fe5b88f59aea670c5b3-20220608 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 983042223; Wed, 08 Jun 2022 01:45:37 -0700 Received: from mtkmbs11n1.mediatek.inc (172.21.101.185) by MTKMBS62DR.mediatek.inc (172.29.94.18) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 8 Jun 2022 01:37:12 -0700 Received: from mtkmbs11n1.mediatek.inc (172.21.101.185) by mtkmbs11n1.mediatek.inc (172.21.101.185) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.792.3; Wed, 8 Jun 2022 16:36:02 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs11n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.792.3 via Frontend Transport; Wed, 8 Jun 2022 16:36:02 +0800 From: Tinghan Shen To: Bjorn Andersson , Mathieu Poirier , Rob Herring , "Krzysztof Kozlowski" , Matthias Brugger , Lee Jones , Benson Leung , "Guenter Roeck" , Sebastian Reichel , Daisuke Nojiri , Kees Cook , Tinghan Shen , "Gustavo A. R. Silva" , Prashant Malani , Enric Balletbo i Serra CC: , , , , , , , Subject: [PATCH v2 7/9] remoteproc: mediatek: Add SCP core 1 as a rproc subdevice Date: Wed, 8 Jun 2022 16:35:51 +0800 Message-ID: <20220608083553.8697-8-tinghan.shen@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20220608083553.8697-1-tinghan.shen@mediatek.com> References: <20220608083553.8697-1-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-20220608_014545_343682_487A0777 X-CRM114-Status: GOOD ( 18.09 ) 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 Because the clock and SRAM power is controlled by SCP core 0, SCP core 1 has to be boot after SCP core 0. We use the rproc subdev to achieve this purpose. The watchdog timeout handler of SCP core 1 is added as part of the rproc subdevice. This allows SCP core 0 to handle watchdog timeout coming from SCP core 1. Signed-off-by: Tinghan Shen --- drivers/remoteproc/mtk_common.h | 9 +++ drivers/remoteproc/mtk_scp.c | 130 ++++++++++++++++++++++++++++++++ 2 files changed, 139 insertions(+) diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h index 5582f4207fbf..67b41866a100 100644 --- a/drivers/remoteproc/mtk_common.h +++ b/drivers/remoteproc/mtk_common.h @@ -99,6 +99,14 @@ struct scp_ipi_desc { void *priv; }; +struct scp_subdev_core { + struct rproc_subdev subdev; + struct mtk_scp *main_scp; + void (*scp_dual_wdt_timeout)(struct mtk_scp *scp, u32 scp_to_host); +}; + +#define to_subdev_core(d) container_of(d, struct scp_subdev_core, subdev) + struct mtk_scp; struct mtk_scp_of_data { @@ -144,6 +152,7 @@ struct mtk_scp { size_t dram_size; struct rproc_subdev *rpmsg_subdev; + struct rproc_subdev *dual_subdev; }; /** diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c index b8a4db581179..d0e9e19e251f 100644 --- a/drivers/remoteproc/mtk_scp.c +++ b/drivers/remoteproc/mtk_scp.c @@ -244,6 +244,13 @@ static void mt8195_scp_irq_handler(struct mtk_scp *scp) } else { if (readl(scp->reg_base + MT8195_SYS_STATUS) & MT8195_CORE1_WDT) { writel(1, scp->reg_base + MT8195_CORE1_WDT_IRQ); + + if (scp->dual_subdev) { + struct scp_subdev_core *subdev_core; + + subdev_core = to_subdev_core(scp->dual_subdev); + subdev_core->scp_dual_wdt_timeout(scp, scp_to_host); + } } else { writel(1, scp->reg_base + MT8192_CORE0_WDT_IRQ); scp_wdt_handler(scp, scp_to_host); @@ -925,6 +932,118 @@ static void scp_remove_rpmsg_subdev(struct mtk_scp *scp) } } +static struct mtk_scp *scp_dual_get(struct mtk_scp *scp) +{ + struct device *dev = scp->dev; + struct device_node *np; + struct platform_device *dual_pdev; + + np = of_parse_phandle(dev->of_node, "mediatek,scp-core", 0); + dual_pdev = of_find_device_by_node(np); + of_node_put(np); + + if (!dual_pdev) { + dev_err(dev, "No scp-dual pdev\n"); + return NULL; + } + + return platform_get_drvdata(dual_pdev); +} + +static void scp_dual_put(struct mtk_scp *scp) +{ + put_device(scp->dev); +} + +static int scp_dual_rproc_start(struct rproc_subdev *subdev) +{ + struct scp_subdev_core *subdev_core = to_subdev_core(subdev); + struct mtk_scp *scp_dual; + + scp_dual = scp_dual_get(subdev_core->main_scp); + if (!scp_dual) + return -ENODEV; + + rproc_boot(scp_dual->rproc); + scp_dual_put(scp_dual); + + return 0; +} + +static void scp_dual_rproc_stop(struct rproc_subdev *subdev, bool crashed) +{ + struct scp_subdev_core *subdev_core = to_subdev_core(subdev); + struct mtk_scp *scp_dual; + + scp_dual = scp_dual_get(subdev_core->main_scp); + if (!scp_dual) + return; + + rproc_shutdown(scp_dual->rproc); + scp_dual_put(scp_dual); +} + +static void scp_dual_wdt_handler(struct mtk_scp *scp, u32 scp_to_host) +{ + struct mtk_scp *scp_dual; + + scp_dual = scp_dual_get(scp); + if (!scp_dual) + return; + + dev_err(scp_dual->dev, "SCP watchdog timeout! 0x%x\n", scp_to_host); + rproc_report_crash(scp_dual->rproc, RPROC_WATCHDOG); + scp_dual_put(scp_dual); +} + +static struct rproc_subdev *scp_dual_create_subdev(struct mtk_scp *scp) +{ + struct device *dev = scp->dev; + struct scp_subdev_core *subdev_core; + struct device_node *np; + + np = of_parse_phandle(dev->of_node, "mediatek,scp-core", 0); + if (!np) + return NULL; + + of_node_put(np); + + subdev_core = devm_kzalloc(dev, sizeof(*subdev_core), GFP_KERNEL); + if (!subdev_core) + return NULL; + + subdev_core->main_scp = scp; + subdev_core->scp_dual_wdt_timeout = scp_dual_wdt_handler; + subdev_core->subdev.start = scp_dual_rproc_start; + subdev_core->subdev.stop = scp_dual_rproc_stop; + + return &subdev_core->subdev; +} + +static void scp_dual_destroy_subdev(struct rproc_subdev *subdev) +{ + struct scp_subdev_core *subdev_core = to_subdev_core(subdev); + + devm_kfree(subdev_core->main_scp->dev, subdev_core); +} + +static void scp_add_dual_subdev(struct mtk_scp *scp) +{ + scp->dual_subdev = scp_dual_create_subdev(scp); + + if (scp->dual_subdev) + rproc_add_subdev(scp->rproc, scp->dual_subdev); +} + +static void scp_remove_dual_subdev(struct mtk_scp *scp) +{ + if (scp->dual_subdev) { + rproc_remove_subdev(scp->rproc, scp->dual_subdev); + scp_dual_destroy_subdev(scp->dual_subdev); + scp->dual_subdev = NULL; + } +} + static int scp_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -1014,6 +1133,9 @@ static int scp_probe(struct platform_device *pdev) scp_add_rpmsg_subdev(scp); + if (core_id == SCP_CORE_0) + scp_add_dual_subdev(scp); + ret = devm_request_threaded_irq(dev, platform_get_irq(pdev, 0), NULL, scp_irq_handler, IRQF_ONESHOT, pdev->name, scp); @@ -1023,6 +1145,12 @@ static int scp_probe(struct platform_device *pdev) goto remove_subdev; } + /* disable auto boot before register rproc. + * scp core 1 is booted as a subdevice of scp core 0. + */ + if (core_id == SCP_CORE_1) + rproc->auto_boot = false; + ret = rproc_add(rproc); if (ret) goto remove_subdev; @@ -1030,6 +1158,7 @@ static int scp_probe(struct platform_device *pdev) return 0; remove_subdev: + scp_remove_dual_subdev(scp); scp_remove_rpmsg_subdev(scp); scp_ipi_unregister(scp, SCP_IPI_INIT); release_dev_mem: @@ -1047,6 +1176,7 @@ static int scp_remove(struct platform_device *pdev) int i; rproc_del(scp->rproc); + scp_remove_dual_subdev(scp); scp_remove_rpmsg_subdev(scp); scp_ipi_unregister(scp, SCP_IPI_INIT); scp_unmap_memory_region(scp);