From patchwork Wed May 17 04:34:45 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tinghan Shen X-Patchwork-Id: 13244186 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 CA670C77B75 for ; Wed, 17 May 2023 04:36:15 +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=ZGgiRp9yf6SzgGOVOZGG58Wp78Q7jQpQXUTXSlBPxRo=; b=lpoU/N4gQpXMsr sDTQ1WoIjHZ8Rnt2UlB+cRAlcKjfYYpoBZZiga6PETSgi8AI9OPGut7o4Lu1n6SAWJOFXhZiyyamk Bs/AiOsNSer7IJNK2a3q1/vF2xdjgnu8LUShMvMnbKUdqxcLh27DvJol54G9tP7TDhpXOSgWCSPdp LvnwUEoMTRvWcD3QtritNz1iDGCqId0LcbjzvDUUsqmm4jnV5RQjDKzzxVh0y9KqcjD35DX3QhxF5 kMorV5/V9SLuEbhZTgBorb2ZiulyULAfTp83GB8gKc1PMxqUGipbgc9p+3K5SD3QNUbiE4DlHwNR5 Z5QAiHIVzrUwIAYRWzRQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pz8tC-0087vo-3B; Wed, 17 May 2023 04:35:50 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1pz8t6-0087r6-0e; Wed, 17 May 2023 04:35:47 +0000 X-UUID: 44db5f30f46c11ed83ed1395ce914268-20230516 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=mJFf4UqkEPOcLYt3DLx8HtQsPAkilJL1hZbjwl0w82s=; b=WVLqJtF9cFoqmVcfsKUW3GptQbTKLqRNY93R2adOulu39PWz9hn2K6H9kLOFvIYFWR0mZFgZ1THLPcnHTOMp8Ykk/fLAW6k6EXQXRxAmvUUPQZt0X2RLHoiM+suUjQE5vj5GD8Dz9K02daILW8ncBOod35zBXLxzftu262hIReU=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.25,REQID:144bf745-8fb2-414d-a44a-6bb620c931c4,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:d5b0ae3,CLOUDID:ce5a6c3b-de1e-4348-bc35-c96f92f1dcbb,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: 44db5f30f46c11ed83ed1395ce914268-20230516 Received: from mtkmbs11n1.mediatek.inc [(172.21.101.185)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 767841378; Tue, 16 May 2023 21:35:36 -0700 Received: from mtkmbs13n2.mediatek.inc (172.21.101.194) by mtkmbs10n2.mediatek.inc (172.21.101.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Wed, 17 May 2023 12:35:34 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs13n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Wed, 17 May 2023 12:35:34 +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 v12 07/11] remoteproc: mediatek: Control SCP core 1 by rproc subdevice Date: Wed, 17 May 2023 12:34:45 +0800 Message-ID: <20230517043449.26352-8-tinghan.shen@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20230517043449.26352-1-tinghan.shen@mediatek.com> References: <20230517043449.26352-1-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-20230516_213544_269933_60232D29 X-CRM114-Status: GOOD ( 18.18 ) 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 | 9 ++++ drivers/remoteproc/mtk_scp.c | 88 +++++++++++++++++++++++++++++++++ 2 files changed, 97 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 d644e232dfec..18534b1179b5 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_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); @@ -989,6 +1044,15 @@ static int scp_add_single_core(struct platform_device *pdev) return 0; } +static void scp_rproc_boot_callback(const struct firmware *fw, void *context) +{ + struct rproc *rproc = context; + + rproc_boot(rproc); + + release_firmware(fw); +} + static int scp_add_multi_core(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -1029,6 +1093,20 @@ static int scp_add_multi_core(struct platform_device *pdev) goto init_fail; } + scp->cluster = cluster; + if (!list_empty(cluster)) { + ret = scp_core_subdev_register(scp); + if (ret) { + dev_err(dev, "Failed to register core %d as subdev\n", core_id); + of_node_put(child); + scp_free(scp); + goto init_fail; + } + } + + /* boot after all cores finished rproc_add() */ + scp->rproc->auto_boot = false; + ret = rproc_add(scp->rproc); if (ret) { dev_err(dev, "Failed to add rproc of core %d\n", core_id); @@ -1041,6 +1119,16 @@ static int scp_add_multi_core(struct platform_device *pdev) core_id++; } + /* boot core 0, and other cores are booted following core 0 as subdevices */ + scp = list_first_entry(cluster, struct mtk_scp, elem); + ret = request_firmware_nowait(THIS_MODULE, FW_ACTION_UEVENT, + scp->rproc->firmware, &scp->rproc->dev, GFP_KERNEL, + scp->rproc, scp_rproc_boot_callback); + if (ret < 0) { + dev_err(dev, "request_firmware_nowait err: %d\n", ret); + goto init_fail; + } + return 0; init_fail: