From patchwork Wed Jun 1 11:21:58 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tinghan Shen X-Patchwork-Id: 12866765 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F3FB5626 for ; Wed, 1 Jun 2022 11:22:17 +0000 (UTC) X-UUID: 349b41b3ae254015962c4a30705fed52-20220601 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.5,REQID:4ac19da0-cc3d-44f0-85dc-b5f8ecc06041,OB:20,L OB:20,IP:0,URL:0,TC:0,Content:0,EDM:0,RT:0,SF:95,FILE:0,RULE:Release_Ham,A CTION:release,TS:95 X-CID-INFO: VERSION:1.1.5,REQID:4ac19da0-cc3d-44f0-85dc-b5f8ecc06041,OB:20,LOB :20,IP:0,URL:0,TC:0,Content:0,EDM:0,RT:0,SF:95,FILE:0,RULE:Spam_GS981B3D,A CTION:quarantine,TS:95 X-CID-META: VersionHash:2a19b09,CLOUDID:9a648f14-f88c-475e-badf-d9ee54230b8f,C OID:63ea4881c016,Recheck:0,SF:28|17|19|48,TC:nil,Content:0,EDM:-3,IP:nil,U RL:0,File:nil,QS:0,BEC:nil X-UUID: 349b41b3ae254015962c4a30705fed52-20220601 Received: from mtkcas10.mediatek.inc [(172.21.101.39)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 672631603; Wed, 01 Jun 2022 19:22:07 +0800 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) 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 15.2.792.3; Wed, 1 Jun 2022 19:22:06 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.792.3 via Frontend Transport; Wed, 1 Jun 2022 19:22:06 +0800 From: Tinghan Shen To: Bjorn Andersson , Mathieu Poirier , Rob Herring , Krzysztof Kozlowski , Matthias Brugger , Lee Jones , Benson Leung , Guenter Roeck , Daisuke Nojiri , Sebastian Reichel , "Dustin L. Howett" , Tzung-Bi Shih , Tinghan Shen , "Gustavo A. R. Silva" , Prashant Malani , Enric Balletbo i Serra , Brian Norris CC: , , , , , , , Subject: [PATCH v1 12/15] remoteproc: mediatek: Add SCP core 1 as a rproc subdevice Date: Wed, 1 Jun 2022 19:21:58 +0800 Message-ID: <20220601112201.15510-13-tinghan.shen@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20220601112201.15510-1-tinghan.shen@mediatek.com> References: <20220601112201.15510-1-tinghan.shen@mediatek.com> Precedence: bulk X-Mailing-List: chrome-platform@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MTK: N 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/Makefile | 2 +- drivers/remoteproc/mtk_common.h | 12 +++ drivers/remoteproc/mtk_scp.c | 32 +++++++ drivers/remoteproc/mtk_scp_dual.c | 8 ++ drivers/remoteproc/mtk_scp_subdev.c | 130 ++++++++++++++++++++++++++++ 5 files changed, 183 insertions(+), 1 deletion(-) create mode 100644 drivers/remoteproc/mtk_scp_subdev.c diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile index 84cb687d28da..97f729f7c4ae 100644 --- a/drivers/remoteproc/Makefile +++ b/drivers/remoteproc/Makefile @@ -15,7 +15,7 @@ obj-$(CONFIG_IMX_REMOTEPROC) += imx_rproc.o obj-$(CONFIG_IMX_DSP_REMOTEPROC) += imx_dsp_rproc.o obj-$(CONFIG_INGENIC_VPU_RPROC) += ingenic_rproc.o obj-$(CONFIG_MTK_SCP) += mtk_scp.o mtk_scp_ipi.o -obj-$(CONFIG_MTK_SCP_DUALCORE) += mtk_scp_dual.o +obj-$(CONFIG_MTK_SCP_DUALCORE) += mtk_scp_dual.o mtk_scp_subdev.o obj-$(CONFIG_OMAP_REMOTEPROC) += omap_remoteproc.o obj-$(CONFIG_WKUP_M3_RPROC) += wkup_m3_rproc.o obj-$(CONFIG_DA8XX_REMOTEPROC) += da8xx_remoteproc.o diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h index 7b363411ec99..a5c26e56277d 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; }; /** @@ -172,4 +181,7 @@ int scp_map_memory_region(struct mtk_scp *scp); void scp_unmap_memory_region(struct mtk_scp *scp); irqreturn_t scp_irq_handler(int irq, void *priv); void scp_ipi_handler(struct mtk_scp *scp); + +struct rproc_subdev *scp_dual_create_subdev(struct mtk_scp *scp); +void scp_dual_destroy_subdev(struct rproc_subdev *subdev); #endif diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c index 55bc4e9d1a6f..c7bf0a44ba0d 100644 --- a/drivers/remoteproc/mtk_scp.c +++ b/drivers/remoteproc/mtk_scp.c @@ -231,6 +231,13 @@ 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); @@ -836,6 +843,27 @@ static void scp_remove_rpmsg_subdev(struct mtk_scp *scp) } } +static void scp_add_dual_subdev(struct mtk_scp *scp) +{ +#if IS_ENABLED(CONFIG_MTK_SCP_DUALCORE) + scp->dual_subdev = scp_dual_create_subdev(scp); + + if (scp->dual_subdev) + rproc_add_subdev(scp->rproc, scp->dual_subdev); +#endif +} + +static void scp_remove_dual_subdev(struct mtk_scp *scp) +{ +#if IS_ENABLED(CONFIG_MTK_SCP_DUALCORE) + if (scp->dual_subdev) { + rproc_remove_subdev(scp->rproc, scp->dual_subdev); + scp_dual_destroy_subdev(scp->dual_subdev); + scp->dual_subdev = NULL; + } +#endif +} + static int scp_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -911,6 +939,8 @@ static int scp_probe(struct platform_device *pdev) scp_add_rpmsg_subdev(scp); + 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); @@ -927,6 +957,7 @@ 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: @@ -944,6 +975,7 @@ 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); diff --git a/drivers/remoteproc/mtk_scp_dual.c b/drivers/remoteproc/mtk_scp_dual.c index 4e8d7f5cdad6..90c49716dd39 100644 --- a/drivers/remoteproc/mtk_scp_dual.c +++ b/drivers/remoteproc/mtk_scp_dual.c @@ -258,6 +258,14 @@ static int scp_dual_probe(struct platform_device *pdev) goto remove_ipi; } + /* disable auto boot before register rproc. + * it's booted as a subdevice of scp core 0. + */ + rproc->auto_boot = false; + ret = devm_rproc_add(dev, rproc); + if (ret) + goto remove_ipi; + return 0; remove_ipi: diff --git a/drivers/remoteproc/mtk_scp_subdev.c b/drivers/remoteproc/mtk_scp_subdev.c new file mode 100644 index 000000000000..197fb207c756 --- /dev/null +++ b/drivers/remoteproc/mtk_scp_subdev.c @@ -0,0 +1,130 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Copyright (c) 2022 MediaTek Inc. + +#include +#include +#include +#include +#include +#include + +#include "mtk_common.h" + +#define SCP_MAIN_CORE 0 +#define SCP_DTS_CORE_ID 0 +#define SCP_DTS_CORE_REF 1 + +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", SCP_DTS_CORE_REF); + 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); +} + +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; + int ret, core_id; + + ret = of_property_read_u32_index(dev->of_node, "mediatek,scp-core", SCP_DTS_CORE_ID, + &core_id); + if (ret < 0) { + dev_warn(dev, "No SCP core id\n"); + return NULL; + } + + if (core_id != SCP_MAIN_CORE) { + dev_dbg(dev, "SCP core id %d\n", core_id); + return NULL; + } + + np = of_parse_phandle(dev->of_node, "mediatek,scp-core", SCP_DTS_CORE_REF); + if (!np) { + dev_err(dev, "Invalid mediatek,scp-core phandle\n"); + 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; +} +EXPORT_SYMBOL_GPL(scp_dual_create_subdev); + +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); +} +EXPORT_SYMBOL_GPL(scp_dual_destroy_subdev); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("MediaTek scp dual core subdev interface");