From patchwork Wed Mar 27 05:14:43 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pi-Hsun Shih X-Patchwork-Id: 10872549 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 99A50922 for ; Wed, 27 Mar 2019 05:15:56 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7E90728C75 for ; Wed, 27 Mar 2019 05:15:56 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 72A6928D52; Wed, 27 Mar 2019 05:15:56 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 0AABF28D56 for ; Wed, 27 Mar 2019 05:15:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=/allpfE46SahplP/Zi0xZ4S24vC+LH1yXJ6nIFK+GeU=; b=JgdAVkuGyeex9r nZxIrQqiGqOJnRqop/e6DruLFp3Cms/6u4WfskMDJsQEQExWIg0gW0uZHo4a+jQA1mxN/0eO98X89 Aqym2ALSwa/fkLLwTD/mpFMAABoyInKZshnYmhHCbyTXtsg25tehACVm+1HFeIAZeDw6XuoO2C3UC MmR8gzDIFXxwcRRyfH6q5R45u6QCxFyYFw0FjHR/u3FGRk8a1k8pYbEC3zcitGm2gNkg2btTcm428 9NL3AbtiS1ubj/5kvdXe+Hn61VV/CDEsHq+xd60+Vsr5e22nKqmmisdrbckznVoHpXJv02SupYphn EplaaPhmkiUvybq6Z6Eg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1h90uO-000465-RX; Wed, 27 Mar 2019 05:15:28 +0000 Received: from mail-pg1-x543.google.com ([2607:f8b0:4864:20::543]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1h90tz-0002Zr-Bd for linux-mediatek@lists.infradead.org; Wed, 27 Mar 2019 05:15:16 +0000 Received: by mail-pg1-x543.google.com with SMTP id j26so7364458pgl.5 for ; Tue, 26 Mar 2019 22:15:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=ykf4Vr8+YQBu3HM6TlXuYVSTHQZbeQlUQPTrMnE/By4=; b=CVBOlK1q8uHo6tNUBZaTCOsxGeGTOVtpB6BfpXH+/iXWEv+xbGh6pYlYpInM8JB0Fa v7o4UcUfADVxYgmwqXSaMBLGA3Uv6oWl7I9lsh7AamiV9b+9RDaA+j9EGWwMzBae5fBa sXCJVGTcsikC6RNfuGMPWMWoU9ckjuitzQ+g4= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ykf4Vr8+YQBu3HM6TlXuYVSTHQZbeQlUQPTrMnE/By4=; b=fliNtZtJuXboXlnGHcUSQeNnFrUSV2zK5IPgYftG7l1xUzoniLEWqFLpumiMkoTxux nbN00PWp8fliozLZ7UWBq7qzDA3HDxhQNiaPfmfwtcxhpSBtxY5z9hbrtWUqxfyyLRxC 0jP85Rmc1aYhOg0X4TqChfA6JjcjOzt7bQs8oN1qGDotljmdqzZCU/MQli/wjtVbeSxk Tqx4ubeHfHmJX6CHLx02tTt08nwvLZI+TJplxXtZ/T8g9dvCuCXPrDsNyX6LF5dRY1iv EeQ2JiY7gYUw1/2hrWb1Hnl5HlMVWPmlw1CxP7tkwxmhPYgPMdVLEAh+8l2p61SuYo+C waHw== X-Gm-Message-State: APjAAAU4VtVkwsYD7czxos0PzR5SZh8m2LYlbjTKxS1XB3/Ey2E7iouo mH25FXPRQojsatJ4ZQelto+2KQ== X-Google-Smtp-Source: APXvYqyP7GLs2iBEgAEnBvpKsM8ipQ7h2tK6i4K30swdkFxy2VhaZMOaRa6ufIxQWtoPOvyZW615NQ== X-Received: by 2002:a62:b40b:: with SMTP id h11mr24147278pfn.133.1553663701403; Tue, 26 Mar 2019 22:15:01 -0700 (PDT) Received: from pihsun-z840.tpe.corp.google.com ([2401:fa00:1:10:7889:7a43:f899:134c]) by smtp.googlemail.com with ESMTPSA id k72sm58622609pfb.122.2019.03.26.22.14.58 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 26 Mar 2019 22:15:00 -0700 (PDT) From: Peter Shih To: Subject: [PATCH v7 1/7] dt-bindings: Add a binding for Mediatek SCP Date: Wed, 27 Mar 2019 13:14:43 +0800 Message-Id: <20190327051450.16222-2-pihsun@chromium.org> X-Mailer: git-send-email 2.21.0.392.gf8f6787159e-goog In-Reply-To: <20190327051450.16222-1-pihsun@chromium.org> References: <20190327051450.16222-1-pihsun@chromium.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190326_221503_417289_73F6A7B4 X-CRM114-Status: GOOD ( 15.17 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Ohad Ben-Cohen , Rob Herring , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , Erin Lo , "open list:REMOTE PROCESSOR REMOTEPROC SUBSYSTEM" , open list , Bjorn Andersson , Rob Herring , "moderated list:ARM/Mediatek SoC support" , Pi-Hsun Shih , Matthias Brugger , Mark Rutland , "moderated list:ARM/Mediatek SoC support" Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Erin Lo Add a DT binding documentation of SCP for the MT8183 SoC from Mediatek. Signed-off-by: Erin Lo Signed-off-by: Pi-Hsun Shih Reviewed-by: Rob Herring --- Changes from v6: - No change. Changes from v5: - Remove dependency on CONFIG_RPMSG_MTK_SCP. Changes from v4: - Add detail of more properties. - Document the usage of mtk,rpmsg-name in subnode from the new design. Changes from v3: - No change. Changes from v2: - No change. I realized that for this patch series, there's no need to add anything under the mt8183-scp node (neither the mt8183-rpmsg or the cros-ec-rpmsg) for them to work, since mt8183-rpmsg is added directly as a rproc_subdev by code, and cros-ec-rpmsg is dynamically created by SCP name service. Changes from v1: - No change. --- .../bindings/remoteproc/mtk,scp.txt | 36 +++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 Documentation/devicetree/bindings/remoteproc/mtk,scp.txt diff --git a/Documentation/devicetree/bindings/remoteproc/mtk,scp.txt b/Documentation/devicetree/bindings/remoteproc/mtk,scp.txt new file mode 100644 index 000000000000..3ba668bab14b --- /dev/null +++ b/Documentation/devicetree/bindings/remoteproc/mtk,scp.txt @@ -0,0 +1,36 @@ +Mediatek SCP Bindings +---------------------------------------- + +This binding provides support for ARM Cortex M4 Co-processor found on some +Mediatek SoCs. + +Required properties: +- compatible Should be "mediatek,mt8183-scp" +- reg Should contain the address ranges for the two memory + regions, SRAM and CFG. +- reg-names Contains the corresponding names for the two memory + regions. These should be named "sram" & "cfg". +- clocks Clock for co-processor (See: ../clock/clock-bindings.txt) +- clock-names Contains the corresponding name for the clock. This + should be named "main". + +Subnodes +-------- + +Subnodes of the SCP represent rpmsg devices. The names of the devices are not +important. The properties of these nodes are defined by the individual bindings +for the rpmsg devices - but must contain the following property: + +- mtk,rpmsg-name Contains the name for the rpmsg device. Used to match + the subnode to rpmsg device announced by SCP. + +Example: + + scp: scp@10500000 { + compatible = "mediatek,mt8183-scp"; + reg = <0 0x10500000 0 0x80000>, + <0 0x105c0000 0 0x5000>; + reg-names = "sram", "cfg"; + clocks = <&infracfg CLK_INFRA_SCPSYS>; + clock-names = "main"; + }; From patchwork Wed Mar 27 05:14:44 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pi-Hsun Shih X-Patchwork-Id: 10872553 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 186A6922 for ; Wed, 27 Mar 2019 05:16:14 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EC94828C75 for ; Wed, 27 Mar 2019 05:16:13 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E0FE028D55; Wed, 27 Mar 2019 05:16:13 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 82A8B28C75 for ; Wed, 27 Mar 2019 05:16:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Jv/BvzWkXxQFd7IcWQ9oILaeAjmvWzsEDsAOpzD75AY=; b=GVhI1jQNHdlb6R m1axxaOoNiwO0daVcgB2/SIsvXsybkSZRlHfg3CdwyRWdWLchUwU3Uf5CNClRSwWHRPP9PZ34I3m9 M+ZJl5Edu39bkEcTefdKlxp4zTZeZYEXNjkm1xBaOIyQRGNcFcO8eWIfKrsjN2l5lZfYVhK8fLSla 83cQRM1ew9qnasNgvQb28gJ1Ysl7ljvpe1KYvrUMPr+Z1+dlYHdprLXVe/lY9jb/ieDUc8e4Avh90 xwRb15/RhDC10HO5X7DCWWEdvzUfGf5tGLg6vw1uA3D+xgnZy9PLE+wxlpduxIbPwasFJfjUemgDo ysdGS7cb3dWTFnThnvRw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1h90uQ-00048N-2t; Wed, 27 Mar 2019 05:15:30 +0000 Received: from mail-pl1-x643.google.com ([2607:f8b0:4864:20::643]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1h90u8-0003nB-3N for linux-mediatek@lists.infradead.org; Wed, 27 Mar 2019 05:15:19 +0000 Received: by mail-pl1-x643.google.com with SMTP id y6so2747858plt.1 for ; Tue, 26 Mar 2019 22:15:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=64uuvAZlojxZHbKS2gJHkOOS6lwDJGv90qEi0U+D1Cc=; b=BOR8J5F80wYtPxUeXFFKDcxTTyQYAHcjXvXfyRih7FQU+lMu4VH2AweizaeofLAbdF Xj5flcbZfO7JqEMptdVg71sTqRSO0Z71XRcI+3tj2urh1ToR3Ad7/RA5iysTYmgxJZ8h BlUHo2MfxFCnxVrOgGV5vyv1cXuvc3jMFjfDA= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=64uuvAZlojxZHbKS2gJHkOOS6lwDJGv90qEi0U+D1Cc=; b=SMJisTeRxbm0GYk18T/WRLKv6gqh144ri8GAsdf54Qk5VPRobtLwWTziozQd04TRVo ieoxFuKvOQbi+NMzESiKIrECMSFYf++3hZSLVhBvkeiqltA24La/uEnDL6V6tVpq7FH4 Ta/Oh+UrGBLLisFNGr/c38r/7/afECbGgEPJW2lqoSrlN69KZc/Hg2bWQeoovlFsMG/y Vo3wCJJ9S0WvExL8e74APHWseKBi6OpY2k4TdwlyY9PtjsgHKnw777GnQCoF5xrHU5qX YOBX7F0d2VRhAyuvj3fibioS9LKoVysv5og7k3s7mo10Dx85gNHLB72SIlFYN23ZtJ7K Rw+Q== X-Gm-Message-State: APjAAAXH1O57tHH02JM1Df7b86Es7vWILbjBRML8D8v9BPoFLbPUM/qK kuNAEKP7D0nttRD6X/+J8mjVgg== X-Google-Smtp-Source: APXvYqxzzprhyh+BEg9xsjC1HQ8Zb5R/pNm6pzaKi49kxlUhx6LOD2JPPym01DvwoL6R/mUxcfMXhw== X-Received: by 2002:a17:902:6907:: with SMTP id j7mr33380658plk.32.1553663710256; Tue, 26 Mar 2019 22:15:10 -0700 (PDT) Received: from pihsun-z840.tpe.corp.google.com ([2401:fa00:1:10:7889:7a43:f899:134c]) by smtp.googlemail.com with ESMTPSA id k72sm58622609pfb.122.2019.03.26.22.15.07 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 26 Mar 2019 22:15:09 -0700 (PDT) From: Peter Shih To: Subject: [PATCH v7 2/7] remoteproc/mediatek: add SCP support for mt8183 Date: Wed, 27 Mar 2019 13:14:44 +0800 Message-Id: <20190327051450.16222-3-pihsun@chromium.org> X-Mailer: git-send-email 2.21.0.392.gf8f6787159e-goog In-Reply-To: <20190327051450.16222-1-pihsun@chromium.org> References: <20190327051450.16222-1-pihsun@chromium.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190326_221512_155116_7F25B868 X-CRM114-Status: GOOD ( 23.61 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Ohad Ben-Cohen , Nicolas Boichat , Erin Lo , "open list:REMOTE PROCESSOR REMOTEPROC SUBSYSTEM" , open list , Bjorn Andersson , "moderated list:ARM/Mediatek SoC support" , Pi-Hsun Shih , Matthias Brugger , "moderated list:ARM/Mediatek SoC support" Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Erin Lo Provide a basic driver to control Cortex M4 co-processor Signed-off-by: Erin Lo Signed-off-by: Nicolas Boichat Signed-off-by: Pi-Hsun Shih --- Changes from v6: - No change. Changes from v5: - Changed some space to tab. Changes from v4: - Rename most function from mtk_scp_* to scp_*. - Change the irq to threaded handler. - Load ELF file instead of plain binary file as firmware by default (Squashed patch 6 in v4 into this patch). Changes from v3: - Fix some issue found by checkpatch. - Make writes aligned in scp_ipi_send. Changes from v2: - Squash patch 3 from v2 (separate the ipi interface) into this patch. - Remove unused name argument from scp_ipi_register. - Add scp_ipi_unregister for proper cleanup. - Move IPI ids in sync with firmware. - Add mb() in proper place, and correctly clear the run->signaled. Changes from v1: - Extract functions and rename variables in mtk_scp.c. --- drivers/remoteproc/Kconfig | 9 + drivers/remoteproc/Makefile | 1 + drivers/remoteproc/mtk_common.h | 75 ++++ drivers/remoteproc/mtk_scp.c | 496 ++++++++++++++++++++++++++ drivers/remoteproc/mtk_scp_ipi.c | 162 +++++++++ include/linux/platform_data/mtk_scp.h | 135 +++++++ 6 files changed, 878 insertions(+) create mode 100644 drivers/remoteproc/mtk_common.h create mode 100644 drivers/remoteproc/mtk_scp.c create mode 100644 drivers/remoteproc/mtk_scp_ipi.c create mode 100644 include/linux/platform_data/mtk_scp.h diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig index f0abd2608044..92bd20d6b9cd 100644 --- a/drivers/remoteproc/Kconfig +++ b/drivers/remoteproc/Kconfig @@ -22,6 +22,15 @@ config IMX_REMOTEPROC It's safe to say N here. +config MTK_SCP + tristate "Mediatek SCP support" + depends on ARCH_MEDIATEK + help + Say y here to support Mediatek's System Companion Processor (SCP) via + the remote processor framework. + + It's safe to say N here. + config OMAP_REMOTEPROC tristate "OMAP remoteproc support" depends on ARCH_OMAP4 || SOC_OMAP5 diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile index ce5d061e92be..16b3e5e7a81c 100644 --- a/drivers/remoteproc/Makefile +++ b/drivers/remoteproc/Makefile @@ -10,6 +10,7 @@ remoteproc-y += remoteproc_sysfs.o remoteproc-y += remoteproc_virtio.o remoteproc-y += remoteproc_elf_loader.o obj-$(CONFIG_IMX_REMOTEPROC) += imx_rproc.o +obj-$(CONFIG_MTK_SCP) += mtk_scp.o mtk_scp_ipi.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 new file mode 100644 index 000000000000..7504ae1bc0ef --- /dev/null +++ b/drivers/remoteproc/mtk_common.h @@ -0,0 +1,75 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2018 MediaTek Inc. + */ + +#ifndef __RPROC_MTK_COMMON_H +#define __RPROC_MTK_COMMON_H + +#include +#include +#include +#include + +#define MT8183_SW_RSTN 0x0 +#define MT8183_SW_RSTN_BIT BIT(0) +#define MT8183_SCP_TO_HOST 0x1C +#define MT8183_SCP_IPC_INT_BIT BIT(0) +#define MT8183_SCP_WDT_INT_BIT BIT(8) +#define MT8183_HOST_TO_SCP 0x28 +#define MT8183_HOST_IPC_INT_BIT BIT(0) +#define MT8183_SCP_SRAM_PDN 0x402C + +#define SCP_FW_VER_LEN 32 + +struct scp_run { + u32 signaled; + s8 fw_ver[SCP_FW_VER_LEN]; + u32 dec_capability; + u32 enc_capability; + wait_queue_head_t wq; +}; + +struct scp_ipi_desc { + scp_ipi_handler_t handler; + void *priv; +}; + +struct mtk_scp { + struct device *dev; + struct rproc *rproc; + struct clk *clk; + void __iomem *reg_base; + void __iomem *sram_base; + size_t sram_size; + + struct share_obj *recv_buf; + struct share_obj *send_buf; + struct scp_run run; + struct mutex lock; /* for protecting mtk_scp data structure */ + struct scp_ipi_desc ipi_desc[SCP_IPI_MAX]; + bool ipi_id_ack[SCP_IPI_MAX]; + wait_queue_head_t ack_wq; + + void __iomem *cpu_addr; + phys_addr_t phys_addr; + size_t dram_size; +}; + +/** + * struct share_obj - SRAM buffer shared with + * AP and SCP + * + * @id: IPI id + * @len: share buffer length + * @share_buf: share buffer data + */ +struct share_obj { + s32 id; + u32 len; + u8 share_buf[288]; +}; + +void scp_memcpy_aligned(void *dst, const void *src, unsigned int len); + +#endif diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c new file mode 100644 index 000000000000..a84d69ae6c53 --- /dev/null +++ b/drivers/remoteproc/mtk_scp.c @@ -0,0 +1,496 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Copyright (c) 2018 MediaTek Inc. + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "mtk_common.h" +#include "remoteproc_internal.h" + +#define MAX_CODE_SIZE 0x500000 +#define SCP_FW_BASE 0x800 + +struct platform_device *scp_get_pdev(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *scp_node; + struct platform_device *scp_pdev; + + scp_node = of_parse_phandle(dev->of_node, "mediatek,scp", 0); + if (!scp_node) { + dev_err(dev, "can't get SCP node\n"); + return NULL; + } + + scp_pdev = of_find_device_by_node(scp_node); + if (WARN_ON(!scp_pdev)) { + dev_err(dev, "SCP pdev failed\n"); + of_node_put(scp_node); + return NULL; + } + + return scp_pdev; +} +EXPORT_SYMBOL_GPL(scp_get_pdev); + +static void scp_wdt_handler(struct mtk_scp *scp) +{ + rproc_report_crash(scp->rproc, RPROC_WATCHDOG); +} + +static void scp_init_ipi_handler(void *data, unsigned int len, void *priv) +{ + struct mtk_scp *scp = (struct mtk_scp *)priv; + struct scp_run *run = (struct scp_run *)data; + + scp->run.signaled = run->signaled; + strncpy(scp->run.fw_ver, run->fw_ver, SCP_FW_VER_LEN); + scp->run.dec_capability = run->dec_capability; + scp->run.enc_capability = run->enc_capability; + wake_up_interruptible(&scp->run.wq); +} + +static void scp_ipi_handler(struct mtk_scp *scp) +{ + struct share_obj *rcv_obj = scp->recv_buf; + struct scp_ipi_desc *ipi_desc = scp->ipi_desc; + u8 tmp_data[288]; + + if (rcv_obj->id >= SCP_IPI_MAX || !ipi_desc[rcv_obj->id].handler) { + dev_err(scp->dev, "No such ipi id = %d\n", rcv_obj->id); + return; + } + + memcpy_fromio(tmp_data, &rcv_obj->share_buf, rcv_obj->len); + ipi_desc[rcv_obj->id].handler(tmp_data, + rcv_obj->len, + ipi_desc[rcv_obj->id].priv); + scp->ipi_id_ack[rcv_obj->id] = true; + wake_up(&scp->ack_wq); +} + +static int scp_ipi_init(struct mtk_scp *scp) +{ + size_t send_offset = SCP_FW_BASE - sizeof(struct share_obj); + size_t recv_offset = send_offset - sizeof(struct share_obj); + + /* Disable SCP to host interrupt */ + writel(MT8183_SCP_IPC_INT_BIT, scp->reg_base + MT8183_SCP_TO_HOST); + + /* shared buffer initialization */ + scp->recv_buf = (__force struct share_obj *)(scp->sram_base + + recv_offset); + scp->send_buf = (__force struct share_obj *)(scp->sram_base + + send_offset); + memset_io(scp->recv_buf, 0, sizeof(scp->recv_buf)); + memset_io(scp->send_buf, 0, sizeof(scp->send_buf)); + + return 0; +} + +static void scp_reset_assert(const struct mtk_scp *scp) +{ + u32 val; + + val = readl(scp->reg_base + MT8183_SW_RSTN); + val &= ~MT8183_SW_RSTN_BIT; + writel(val, scp->reg_base + MT8183_SW_RSTN); +} + +static void scp_reset_deassert(const struct mtk_scp *scp) +{ + u32 val; + + val = readl(scp->reg_base + MT8183_SW_RSTN); + val |= MT8183_SW_RSTN_BIT; + writel(val, scp->reg_base + MT8183_SW_RSTN); +} + +static irqreturn_t scp_irq_handler(int irq, void *priv) +{ + struct mtk_scp *scp = priv; + u32 scp_to_host; + + scp_to_host = readl(scp->reg_base + MT8183_SCP_TO_HOST); + if (scp_to_host & MT8183_SCP_IPC_INT_BIT) { + scp_ipi_handler(scp); + } else { + dev_err(scp->dev, "SCP watchdog timeout! 0x%x", scp_to_host); + scp_wdt_handler(scp); + } + + /* + * Ensure that all writes to SRAM are committed before another + * interrupt. + */ + mb(); + /* SCP won't send another interrupt until we set SCP_TO_HOST to 0. */ + writel(MT8183_SCP_IPC_INT_BIT | MT8183_SCP_WDT_INT_BIT, + scp->reg_base + MT8183_SCP_TO_HOST); + + return IRQ_HANDLED; +} + +int scp_elf_load_segments(struct rproc *rproc, const struct firmware *fw) +{ + struct device *dev = &rproc->dev; + struct elf32_hdr *ehdr; + struct elf32_phdr *phdr; + int i, ret = 0; + const u8 *elf_data = fw->data; + + ehdr = (struct elf32_hdr *)elf_data; + phdr = (struct elf32_phdr *)(elf_data + ehdr->e_phoff); + + /* go through the available ELF segments */ + for (i = 0; i < ehdr->e_phnum; i++, phdr++) { + u32 da = phdr->p_paddr; + u32 memsz = phdr->p_memsz; + u32 filesz = phdr->p_filesz; + u32 offset = phdr->p_offset; + void __iomem *ptr; + + if (phdr->p_type != PT_LOAD) + continue; + + dev_dbg(dev, "phdr: type %d da 0x%x memsz 0x%x filesz 0x%x\n", + phdr->p_type, da, memsz, filesz); + + if (filesz > memsz) { + dev_err(dev, "bad phdr filesz 0x%x memsz 0x%x\n", + filesz, memsz); + ret = -EINVAL; + break; + } + + if (offset + filesz > fw->size) { + dev_err(dev, "truncated fw: need 0x%x avail 0x%zx\n", + offset + filesz, fw->size); + ret = -EINVAL; + break; + } + + /* grab the kernel address for this device address */ + ptr = rproc_da_to_va(rproc, da, memsz); + if (!ptr) { + dev_err(dev, "bad phdr da 0x%x mem 0x%x\n", da, memsz); + ret = -EINVAL; + break; + } + + /* put the segment where the remote processor expects it */ + if (phdr->p_filesz) + scp_memcpy_aligned(ptr, elf_data + phdr->p_offset, + filesz); + } + + return ret; +} + +static int scp_load(struct rproc *rproc, const struct firmware *fw) +{ + const struct mtk_scp *scp = rproc->priv; + struct device *dev = scp->dev; + int ret; + + /* Hold SCP in reset while loading FW. */ + scp_reset_assert(scp); + + ret = clk_prepare_enable(scp->clk); + if (ret) { + scp_reset_deassert(scp); + dev_err(dev, "failed to enable clocks\n"); + return ret; + } + + /* Turn on the power of SCP's SRAM before using it. */ + writel(0x0, scp->reg_base + MT8183_SCP_SRAM_PDN); + + return scp_elf_load_segments(rproc, fw); +} + +static int scp_start(struct rproc *rproc) +{ + struct mtk_scp *scp = (struct mtk_scp *)rproc->priv; + struct device *dev = scp->dev; + struct scp_run *run; + int ret; + + ret = clk_prepare_enable(scp->clk); + if (ret) { + dev_err(dev, "failed to enable clocks\n"); + return ret; + } + + run = &scp->run; + run->signaled = false; + + scp_reset_deassert(scp); + + ret = wait_event_interruptible_timeout( + run->wq, + run->signaled, + msecs_to_jiffies(2000)); + + if (ret == 0) { + dev_err(dev, "wait SCP initialization timeout!\n"); + ret = -ETIME; + goto stop; + } + if (ret == -ERESTARTSYS) { + dev_err(dev, "wait SCP interrupted by a signal!\n"); + goto stop; + } + dev_info(dev, "SCP is ready. FW version %s\n", run->fw_ver); + + return 0; + +stop: + scp_reset_assert(scp); + clk_disable_unprepare(scp->clk); + return ret; +} + +static void *scp_da_to_va(struct rproc *rproc, u64 da, int len) +{ + struct mtk_scp *scp = (struct mtk_scp *)rproc->priv; + int offset; + + if (da < scp->sram_size) { + offset = da; + if (offset >= 0 && ((offset + len) < scp->sram_size)) + return (__force void *)(scp->sram_base + offset); + } else if (da >= scp->sram_size && + da < (scp->sram_size + MAX_CODE_SIZE)) { + offset = da - scp->sram_size; + if (offset >= 0 && (offset + len) < MAX_CODE_SIZE) + return scp->cpu_addr + offset; + } else { + offset = da - scp->phys_addr; + if (offset >= 0 && + (offset + len) < (scp->dram_size - MAX_CODE_SIZE)) + return scp->cpu_addr + offset; + } + + return NULL; +} + +static int scp_stop(struct rproc *rproc) +{ + struct mtk_scp *scp = (struct mtk_scp *)rproc->priv; + + scp_reset_assert(scp); + clk_disable_unprepare(scp->clk); + + return 0; +} + +static const struct rproc_ops scp_ops = { + .start = scp_start, + .stop = scp_stop, + .load = scp_load, + .da_to_va = scp_da_to_va, +}; + +unsigned int scp_get_vdec_hw_capa(struct platform_device *pdev) +{ + struct mtk_scp *scp = platform_get_drvdata(pdev); + + return scp->run.dec_capability; +} +EXPORT_SYMBOL_GPL(scp_get_vdec_hw_capa); + +unsigned int scp_get_venc_hw_capa(struct platform_device *pdev) +{ + struct mtk_scp *scp = platform_get_drvdata(pdev); + + return scp->run.enc_capability; +} +EXPORT_SYMBOL_GPL(scp_get_venc_hw_capa); + +void *scp_mapping_dm_addr(struct platform_device *pdev, u32 mem_addr) +{ + struct mtk_scp *scp = platform_get_drvdata(pdev); + void *ptr; + + ptr = scp_da_to_va(scp->rproc, mem_addr, 0); + if (!ptr) + return ERR_PTR(-EINVAL); + + return ptr; +} +EXPORT_SYMBOL_GPL(scp_mapping_dm_addr); + +static int scp_map_memory_region(struct mtk_scp *scp) +{ + struct device_node *node; + struct resource r; + int ret; + + node = of_parse_phandle(scp->dev->of_node, "memory-region", 0); + if (!node) { + dev_err(scp->dev, "no memory-region specified\n"); + return -EINVAL; + } + + ret = of_address_to_resource(node, 0, &r); + if (ret) + return ret; + + scp->phys_addr = r.start; + scp->dram_size = resource_size(&r); + scp->cpu_addr = + devm_ioremap_wc(scp->dev, scp->phys_addr, scp->dram_size); + + if (!scp->cpu_addr) { + dev_err(scp->dev, "unable to map memory region: %pa+%zx\n", + &r.start, scp->dram_size); + return -EBUSY; + } + + return 0; +} + +static int scp_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + struct mtk_scp *scp; + struct rproc *rproc; + struct resource *res; + char *fw_name = "scp.img"; + int ret; + + rproc = rproc_alloc(dev, + np->name, + &scp_ops, + fw_name, + sizeof(*scp)); + if (!rproc) { + dev_err(dev, "unable to allocate remoteproc\n"); + return -ENOMEM; + } + + scp = (struct mtk_scp *)rproc->priv; + scp->rproc = rproc; + scp->dev = dev; + platform_set_drvdata(pdev, scp); + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sram"); + scp->sram_base = devm_ioremap_resource(dev, res); + if (IS_ERR((__force void *)scp->sram_base)) { + dev_err(dev, "Failed to parse and map sram memory\n"); + ret = PTR_ERR((__force void *)scp->sram_base); + goto free_rproc; + } + scp->sram_size = resource_size(res); + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cfg"); + scp->reg_base = devm_ioremap_resource(dev, res); + if (IS_ERR((__force void *)scp->reg_base)) { + dev_err(dev, "Failed to parse and map cfg memory\n"); + ret = PTR_ERR((__force void *)scp->reg_base); + goto free_rproc; + } + + ret = scp_map_memory_region(scp); + if (ret) + goto free_rproc; + + scp->clk = devm_clk_get(dev, "main"); + if (IS_ERR(scp->clk)) { + dev_err(dev, "Failed to get clock\n"); + ret = PTR_ERR(scp->clk); + goto free_rproc; + } + + ret = clk_prepare_enable(scp->clk); + if (ret) { + dev_err(dev, "failed to enable clocks\n"); + goto free_rproc; + } + + ret = scp_ipi_init(scp); + clk_disable_unprepare(scp->clk); + if (ret) { + dev_err(dev, "Failed to init ipi\n"); + goto free_rproc; + } + + /* register SCP initialization IPI */ + ret = scp_ipi_register(pdev, + SCP_IPI_INIT, + scp_init_ipi_handler, + scp); + if (ret) { + dev_err(dev, "Failed to register IPI_SCP_INIT\n"); + goto free_rproc; + } + + mutex_init(&scp->lock); + + init_waitqueue_head(&scp->run.wq); + init_waitqueue_head(&scp->ack_wq); + + ret = devm_request_threaded_irq(dev, platform_get_irq(pdev, 0), NULL, + scp_irq_handler, IRQF_ONESHOT, + pdev->name, scp); + + if (ret) { + dev_err(dev, "failed to request irq\n"); + goto destroy_mutex; + } + + ret = rproc_add(rproc); + if (ret) + goto destroy_mutex; + + return ret; + +destroy_mutex: + mutex_destroy(&scp->lock); +free_rproc: + rproc_free(rproc); + + return ret; +} + +static int scp_remove(struct platform_device *pdev) +{ + struct mtk_scp *scp = platform_get_drvdata(pdev); + + rproc_del(scp->rproc); + rproc_free(scp->rproc); + + return 0; +} + +static const struct of_device_id mtk_scp_of_match[] = { + { .compatible = "mediatek,mt8183-scp"}, + {}, +}; +MODULE_DEVICE_TABLE(of, mtk_scp_of_match); + +static struct platform_driver mtk_scp_driver = { + .probe = scp_probe, + .remove = scp_remove, + .driver = { + .name = "mtk-scp", + .of_match_table = of_match_ptr(mtk_scp_of_match), + }, +}; + +module_platform_driver(mtk_scp_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("MediaTek SCP control driver"); diff --git a/drivers/remoteproc/mtk_scp_ipi.c b/drivers/remoteproc/mtk_scp_ipi.c new file mode 100644 index 000000000000..f5d271c0f623 --- /dev/null +++ b/drivers/remoteproc/mtk_scp_ipi.c @@ -0,0 +1,162 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Copyright (c) 2018 MediaTek Inc. + +#include +#include +#include +#include +#include +#include +#include + +#include "mtk_common.h" + +int scp_ipi_register(struct platform_device *pdev, + enum scp_ipi_id id, + scp_ipi_handler_t handler, + void *priv) +{ + struct mtk_scp *scp = platform_get_drvdata(pdev); + struct scp_ipi_desc *ipi_desc; + + if (!scp) { + dev_err(&pdev->dev, "scp device is not ready\n"); + return -EPROBE_DEFER; + } + + if (WARN_ON(id < 0) || WARN_ON(id >= SCP_IPI_MAX) || + WARN_ON(handler == NULL)) + return -EINVAL; + + ipi_desc = scp->ipi_desc; + ipi_desc[id].handler = handler; + ipi_desc[id].priv = priv; + + return 0; +} +EXPORT_SYMBOL_GPL(scp_ipi_register); + +void scp_ipi_unregister(struct platform_device *pdev, enum scp_ipi_id id) +{ + struct mtk_scp *scp = platform_get_drvdata(pdev); + struct scp_ipi_desc *ipi_desc; + + if (!scp) + return; + + if (WARN_ON(id < 0) || WARN_ON(id >= SCP_IPI_MAX)) + return; + + ipi_desc = scp->ipi_desc; + ipi_desc[id].handler = NULL; + ipi_desc[id].priv = NULL; +} +EXPORT_SYMBOL_GPL(scp_ipi_unregister); + +/* + * Copy src to dst, where dst is in SCP SRAM region. + * Since AP access of SCP SRAM don't support byte write, this always write a + * full word at a time, and may cause some extra bytes to be written at the + * beginning & ending of dst. + */ +void scp_memcpy_aligned(void *dst, const void *src, unsigned int len) +{ + void *ptr; + u32 val; + unsigned int i = 0; + + if (!IS_ALIGNED((unsigned long)dst, 4)) { + ptr = (void *)ALIGN_DOWN((unsigned long)dst, 4); + i = 4 - (dst - ptr); + val = readl_relaxed(ptr); + memcpy((u8 *)&val + (4 - i), src, i); + writel_relaxed(val, ptr); + } + + while (i + 4 <= len) { + val = *((u32 *)(src + i)); + writel_relaxed(val, dst + i); + i += 4; + } + if (i < len) { + val = readl_relaxed(dst + i); + memcpy(&val, src + i, len - i); + writel_relaxed(val, dst + i); + } +} +EXPORT_SYMBOL_GPL(scp_memcpy_aligned); + +int scp_ipi_send(struct platform_device *pdev, + enum scp_ipi_id id, + void *buf, + unsigned int len, + unsigned int wait) +{ + struct mtk_scp *scp = platform_get_drvdata(pdev); + struct share_obj *send_obj = scp->send_buf; + unsigned long timeout; + int ret; + + if (WARN_ON(id <= SCP_IPI_INIT) || WARN_ON(id >= SCP_IPI_MAX) || + WARN_ON(len > sizeof(send_obj->share_buf)) || WARN_ON(!buf)) + return -EINVAL; + + mutex_lock(&scp->lock); + + ret = clk_prepare_enable(scp->clk); + if (ret) { + dev_err(scp->dev, "failed to enable clock\n"); + return ret; + } + + /* Wait until SCP receives the last command */ + timeout = jiffies + msecs_to_jiffies(2000); + do { + if (time_after(jiffies, timeout)) { + dev_err(scp->dev, "%s: IPI timeout!\n", __func__); + ret = -EIO; + mutex_unlock(&scp->lock); + goto clock_disable; + } + } while (readl(scp->reg_base + MT8183_HOST_TO_SCP)); + + scp_memcpy_aligned(send_obj->share_buf, buf, len); + + send_obj->len = len; + send_obj->id = id; + + scp->ipi_id_ack[id] = false; + /* + * Ensure that all writes to SRAM are committed before sending the + * interrupt to SCP. + */ + mb(); + /* send the command to SCP */ + writel(MT8183_HOST_IPC_INT_BIT, scp->reg_base + MT8183_HOST_TO_SCP); + + mutex_unlock(&scp->lock); + + if (wait) { + /* wait for SCP's ACK */ + timeout = msecs_to_jiffies(wait); + ret = wait_event_timeout(scp->ack_wq, + scp->ipi_id_ack[id], + timeout); + scp->ipi_id_ack[id] = false; + if (WARN(!ret, + "scp ipi %d ack time out !", id)) + ret = -EIO; + else + ret = 0; + } + +clock_disable: + clk_disable_unprepare(scp->clk); + + return ret; +} +EXPORT_SYMBOL_GPL(scp_ipi_send); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("MediaTek scp IPI interface"); diff --git a/include/linux/platform_data/mtk_scp.h b/include/linux/platform_data/mtk_scp.h new file mode 100644 index 000000000000..dfda05051235 --- /dev/null +++ b/include/linux/platform_data/mtk_scp.h @@ -0,0 +1,135 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2018 MediaTek Inc. + */ + +#ifndef _MTK_SCP_H +#define _MTK_SCP_H + +#include + +typedef void (*scp_ipi_handler_t) (void *data, + unsigned int len, + void *priv); + +/** + * enum ipi_id - the id of inter-processor interrupt + * + * @SCP_IPI_INIT: The interrupt from scp is to notfiy kernel + * SCP initialization completed. + * IPI_SCP_INIT is sent from SCP when firmware is + * loaded. AP doesn't need to send IPI_SCP_INIT + * command to SCP. + * For other IPI below, AP should send the request + * to SCP to trigger the interrupt. + * @SCP_IPI_MAX: The maximum IPI number + */ + +enum scp_ipi_id { + SCP_IPI_INIT = 0, + SCP_IPI_VDEC_H264, + SCP_IPI_VDEC_VP8, + SCP_IPI_VDEC_VP9, + SCP_IPI_VENC_H264, + SCP_IPI_VENC_VP8, + SCP_IPI_MDP, + SCP_IPI_CROS_HOST_CMD, + SCP_IPI_MAX, +}; + +/** + * scp_ipi_register - register an ipi function + * + * @pdev: SCP platform device + * @id: IPI ID + * @handler: IPI handler + * @priv: private data for IPI handler + * + * Register an ipi function to receive ipi interrupt from SCP. + * + * Return: Return 0 if ipi registers successfully, otherwise it is failed. + */ +int scp_ipi_register(struct platform_device *pdev, + enum scp_ipi_id id, + scp_ipi_handler_t handler, + void *priv); + +/** + * scp_ipi_unregister - unregister an ipi function + * + * @pdev: SCP platform device + * @id: IPI ID + * + * Unregister an ipi function to receive ipi interrupt from SCP. + */ +void scp_ipi_unregister(struct platform_device *pdev, enum scp_ipi_id id); + +/** + * scp_ipi_send - send data from AP to scp. + * + * @pdev: SCP platform device + * @id: IPI ID + * @buf: the data buffer + * @len: the data buffer length + * @wait: 1: need ack + * + * This function is thread-safe. When this function returns, + * SCP has received the data and starts the processing. + * When the processing completes, IPI handler registered + * by scp_ipi_register will be called in interrupt context. + * + * Return: Return 0 if sending data successfully, otherwise it is failed. + **/ +int scp_ipi_send(struct platform_device *pdev, + enum scp_ipi_id id, + void *buf, + unsigned int len, + unsigned int wait); + +/** + * scp_get_pdev - get SCP's platform device + * + * @pdev: the platform device of the module requesting SCP platform + * device for using SCP API. + * + * Return: Return NULL if it is failed. + * otherwise it is SCP's platform device + **/ +struct platform_device *scp_get_pdev(struct platform_device *pdev); + +/** + * scp_get_vdec_hw_capa - get video decoder hardware capability + * + * @pdev: SCP platform device + * + * Return: video decoder hardware capability + **/ +unsigned int scp_get_vdec_hw_capa(struct platform_device *pdev); + +/** + * scp_get_venc_hw_capa - get video encoder hardware capability + * + * @pdev: SCP platform device + * + * Return: video encoder hardware capability + **/ +unsigned int scp_get_venc_hw_capa(struct platform_device *pdev); + +/** + * scp_mapping_dm_addr - Mapping SRAM/DRAM to kernel virtual address + * + * @pdev: SCP platform device + * @mem_addr: SCP views memory address + * + * Mapping the SCP's SRAM address / + * DMEM (Data Extended Memory) memory address / + * Working buffer memory address to + * kernel virtual address. + * + * Return: Return ERR_PTR(-EINVAL) if mapping failed, + * otherwise the mapped kernel virtual address + **/ +void *scp_mapping_dm_addr(struct platform_device *pdev, + u32 mem_addr); + +#endif /* _MTK_SCP_H */ From patchwork Wed Mar 27 05:14:45 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pi-Hsun Shih X-Patchwork-Id: 10872607 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A7A271390 for ; Wed, 27 Mar 2019 05:22:17 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8CAB128D57 for ; Wed, 27 Mar 2019 05:22:17 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7E98228D5D; Wed, 27 Mar 2019 05:22:17 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 9F93528D57 for ; Wed, 27 Mar 2019 05:22:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=V8IBeqzrgJOXNwjjgyUy2o+Rc28Kq21qPJirmTgZnM0=; b=Bg4HG7Mgc1HdfZ HcLSniWD9SL1K1WhBVBCn/3+xPIToL6VS3ryujqo+xtRuqQq7SX3Au2ZFyKjhqW8V+Gl4NkQ2gwUZ 1XsBej1n0nDYST6DmTOwZKjzWJ5XwwAcMAXcWg3OQz0aIuVFW2HcgiHrr02ThM90txSPbACscje0W P0Um1FYw0KlVCVeHTI5UldU//+mioROPkP8FQ/4x689HmxEVVmIPoElPj3Zd2zpvDLhMGpmak2u+v 2cQJkAkQQcJ42O9TIaRGXevw94ffPB410AnZXMHIIzWsKWXKSM9fv+/w7/0ayq8IKgOlYS0t+r2yI gbF5zQ+EA0wGZtqx4ZMQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1h910n-0006up-4v; Wed, 27 Mar 2019 05:22:05 +0000 Received: from mail-pg1-x544.google.com ([2607:f8b0:4864:20::544]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1h90uE-0003r6-Ki for linux-mediatek@lists.infradead.org; Wed, 27 Mar 2019 05:15:22 +0000 Received: by mail-pg1-x544.google.com with SMTP id y3so9356364pgk.12 for ; Tue, 26 Mar 2019 22:15:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=R3TJ7NxXlWd2gqdvA7ApFmupxYWdtnCpzncSRssaca8=; b=DHo8MTk7n4TSGqGeqDv51Q69GSLUHk7zfChkGMPBLSaHP1ofsQLu+fmVmqt6JKlbmG bvPFJtyDIZmXTwDynfhNcRG5F+jMTtzCdYBx7EUMRnuuSNLONXBnehua9+P6pCx1JpeB qS7oj+rrHvcg8NRtcW5SkhQ2Tifgw6fEZ+Xzg= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=R3TJ7NxXlWd2gqdvA7ApFmupxYWdtnCpzncSRssaca8=; b=GX04SipLfRXj7A1y4D+kbeC6JlGchjYgPmZQc5CGmc7KRS4lm0iRw1E7AHKktfcpIx ySQ4Rhj2q6q0PVXvgu1nONNVQu95hSM7B/aWyd4GBtl7Tl5CWGbWAdQvbKCyBeUtASwj MkU01gD5dWrc4iWbo6oRzSQ+d9pytWR9GfuYF+VMYkonIHzY/PurZbr4x9V4d2D8E5XD 1v7+uWVYJrmw0y+WJQmYmow2oeBJovuvFp/SuIZXztWHH56k6CjEAiGIcw0flh2BbLAr zw+SxWGIj88ANKsJK0h7HCW2pw57dEtk+iyS6R/myQ5hf1Oev2EvQNkxKfEUFz2K41pz zbHQ== X-Gm-Message-State: APjAAAU/XYKdGKK+FW0MsGPY07viVkEQh519YiovUUkSTG2w4zOGE3TS R7oeneiU02E6h3b8rJ1VIvIjfQ== X-Google-Smtp-Source: APXvYqxyh7DssKZYjrLD3POUO7s81hg8+vK45QCp0vDwdDUqCEl8I/Jv71BRx/L4G3CFOztgM8rgEw== X-Received: by 2002:a65:448b:: with SMTP id l11mr8955790pgq.185.1553663717002; Tue, 26 Mar 2019 22:15:17 -0700 (PDT) Received: from pihsun-z840.tpe.corp.google.com ([2401:fa00:1:10:7889:7a43:f899:134c]) by smtp.googlemail.com with ESMTPSA id k72sm58622609pfb.122.2019.03.26.22.15.14 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 26 Mar 2019 22:15:16 -0700 (PDT) From: Peter Shih To: Subject: [PATCH v7 3/7] remoteproc: mt8183: add reserved memory manager API Date: Wed, 27 Mar 2019 13:14:45 +0800 Message-Id: <20190327051450.16222-4-pihsun@chromium.org> X-Mailer: git-send-email 2.21.0.392.gf8f6787159e-goog In-Reply-To: <20190327051450.16222-1-pihsun@chromium.org> References: <20190327051450.16222-1-pihsun@chromium.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190326_221518_900679_B244F25C X-CRM114-Status: GOOD ( 12.57 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Ohad Ben-Cohen , Nicolas Boichat , Erin Lo , "open list:REMOTE PROCESSOR REMOTEPROC SUBSYSTEM" , open list , Bjorn Andersson , "moderated list:ARM/Mediatek SoC support" , Pi-Hsun Shih , Matthias Brugger , "moderated list:ARM/Mediatek SoC support" Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Erin Lo Add memory table mapping API for other driver to lookup reserved physical and virtual memory Signed-off-by: Erin Lo Signed-off-by: Pi-Hsun Shih --- Changes from v6: - No change. Changes from v5: - No change. Changes from v4: - New patch. --- drivers/remoteproc/mtk_scp.c | 111 ++++++++++++++++++++++++++ include/linux/platform_data/mtk_scp.h | 20 +++++ 2 files changed, 131 insertions(+) diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c index a84d69ae6c53..ca45cb729bd3 100644 --- a/drivers/remoteproc/mtk_scp.c +++ b/drivers/remoteproc/mtk_scp.c @@ -331,6 +331,113 @@ void *scp_mapping_dm_addr(struct platform_device *pdev, u32 mem_addr) } EXPORT_SYMBOL_GPL(scp_mapping_dm_addr); +#if SCP_RESERVED_MEM +phys_addr_t scp_mem_base_phys; +phys_addr_t scp_mem_base_virt; +phys_addr_t scp_mem_size; + +static struct scp_reserve_mblock scp_reserve_mblock[] = { + { + .num = SCP_ISP_MEM_ID, + .start_phys = 0x0, + .start_virt = 0x0, + .size = 0x1400000, /*20MB*/ + }, +}; + +static int scp_reserve_mem_init(struct mtk_scp *scp) +{ + enum scp_reserve_mem_id_t id; + phys_addr_t accumlate_memory_size = 0; + + scp_mem_base_phys = (phys_addr_t) (scp->phys_addr + MAX_CODE_SIZE); + scp_mem_size = (phys_addr_t) (scp->dram_size - MAX_CODE_SIZE); + + dev_info(scp->dev, + "phys:0x%llx - 0x%llx (0x%llx)\n", + scp_mem_base_phys, + scp_mem_base_phys + scp_mem_size, + scp_mem_size); + accumlate_memory_size = 0; + for (id = 0; id < SCP_NUMS_MEM_ID; id++) { + scp_reserve_mblock[id].start_phys = + scp_mem_base_phys + accumlate_memory_size; + accumlate_memory_size += scp_reserve_mblock[id].size; + dev_info(scp->dev, + "[reserve_mem:%d]: phys:0x%llx - 0x%llx (0x%llx)\n", + id, scp_reserve_mblock[id].start_phys, + scp_reserve_mblock[id].start_phys + + scp_reserve_mblock[id].size, + scp_reserve_mblock[id].size); + } + return 0; +} + +static int scp_reserve_memory_ioremap(struct mtk_scp *scp) +{ + enum scp_reserve_mem_id_t id; + phys_addr_t accumlate_memory_size = 0; + + scp_mem_base_virt = (phys_addr_t)(size_t)ioremap_wc(scp_mem_base_phys, + scp_mem_size); + + dev_info(scp->dev, + "virt:0x%llx - 0x%llx (0x%llx)\n", + (phys_addr_t)scp_mem_base_virt, + (phys_addr_t)scp_mem_base_virt + (phys_addr_t)scp_mem_size, + scp_mem_size); + for (id = 0; id < SCP_NUMS_MEM_ID; id++) { + scp_reserve_mblock[id].start_virt = + scp_mem_base_virt + accumlate_memory_size; + accumlate_memory_size += scp_reserve_mblock[id].size; + } + /* the reserved memory should be larger then expected memory + * or scp_reserve_mblock does not match dts + */ + WARN_ON(accumlate_memory_size > scp_mem_size); +#ifdef DEBUG + for (id = 0; id < NUMS_MEM_ID; id++) { + dev_info(scp->dev, + "[mem_reserve-%d] phys:0x%llx,virt:0x%llx,size:0x%llx\n", + id, + scp_get_reserve_mem_phys(id), + scp_get_reserve_mem_virt(id), + scp_get_reserve_mem_size(id)); + } +#endif + return 0; +} +phys_addr_t scp_get_reserve_mem_phys(enum scp_reserve_mem_id_t id) +{ + if (id >= SCP_NUMS_MEM_ID) { + pr_err("[SCP] no reserve memory for %d", id); + return 0; + } else + return scp_reserve_mblock[id].start_phys; +} +EXPORT_SYMBOL_GPL(scp_get_reserve_mem_phys); + +phys_addr_t scp_get_reserve_mem_virt(enum scp_reserve_mem_id_t id) +{ + if (id >= SCP_NUMS_MEM_ID) { + pr_err("[SCP] no reserve memory for %d", id); + return 0; + } else + return scp_reserve_mblock[id].start_virt; +} +EXPORT_SYMBOL_GPL(scp_get_reserve_mem_virt); + +phys_addr_t scp_get_reserve_mem_size(enum scp_reserve_mem_id_t id) +{ + if (id >= SCP_NUMS_MEM_ID) { + pr_err("[SCP] no reserve memory for %d", id); + return 0; + } else + return scp_reserve_mblock[id].size; +} +EXPORT_SYMBOL_GPL(scp_get_reserve_mem_size); +#endif + static int scp_map_memory_region(struct mtk_scp *scp) { struct device_node *node; @@ -358,6 +465,10 @@ static int scp_map_memory_region(struct mtk_scp *scp) return -EBUSY; } +#if SCP_RESERVED_MEM + scp_reserve_mem_init(scp); + scp_reserve_memory_ioremap(scp); +#endif return 0; } diff --git a/include/linux/platform_data/mtk_scp.h b/include/linux/platform_data/mtk_scp.h index dfda05051235..7625eede2e58 100644 --- a/include/linux/platform_data/mtk_scp.h +++ b/include/linux/platform_data/mtk_scp.h @@ -132,4 +132,24 @@ unsigned int scp_get_venc_hw_capa(struct platform_device *pdev); void *scp_mapping_dm_addr(struct platform_device *pdev, u32 mem_addr); +#define SCP_RESERVED_MEM (1) +#if SCP_RESERVED_MEM +/* scp reserve memory ID definition*/ +enum scp_reserve_mem_id_t { + SCP_ISP_MEM_ID, + SCP_NUMS_MEM_ID, +}; + +struct scp_reserve_mblock { + enum scp_reserve_mem_id_t num; + u64 start_phys; + u64 start_virt; + u64 size; +}; + +extern phys_addr_t scp_get_reserve_mem_phys(enum scp_reserve_mem_id_t id); +extern phys_addr_t scp_get_reserve_mem_virt(enum scp_reserve_mem_id_t id); +extern phys_addr_t scp_get_reserve_mem_size(enum scp_reserve_mem_id_t id); +#endif + #endif /* _MTK_SCP_H */ From patchwork Wed Mar 27 05:14:46 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pi-Hsun Shih X-Patchwork-Id: 10872605 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E1F591390 for ; Wed, 27 Mar 2019 05:22:13 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C242B28D57 for ; Wed, 27 Mar 2019 05:22:13 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B53C528D5D; Wed, 27 Mar 2019 05:22:13 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id A478328D57 for ; Wed, 27 Mar 2019 05:22:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=/q/MvdH5su7Z/WKGf8sO21Ss66jhYBBVvkOzk76Vteo=; b=GkB/54+uWDRn+K j+oJYRbl1rFnvQ+lhCnHx23H5swPTzd+7WnizHSi1H9Rj1bm0bsSK9qI1YEs5GzJmhy6ko3Epf7k2 UbaTyj92BVDSgTQLAlOHu2gWSvLSsj78s/1eWvp7Gj+BLJrloIeIqtAuGJGm4K0xKfM1544OY0MS9 MaYhgwFP4U/pDvTw7RjE3DPQgV8rjScC8MBb4Bjt/JUpog+bJmvZfr8lO4sjcX4KueK0gOdDbW6Yy Z+Qfe+GnF1C6PqK9AL9CiHW3VL5ROOojfEvXTzarB0gFmp0xT6NC7ehbeKca+NcmgDwI5h5YgKkvs l0lFPnNvyOq2YS4xYNdw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1h910n-0006vG-Ib; Wed, 27 Mar 2019 05:22:05 +0000 Received: from mail-pf1-x442.google.com ([2607:f8b0:4864:20::442]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1h90uO-00041F-W2 for linux-mediatek@lists.infradead.org; Wed, 27 Mar 2019 05:15:49 +0000 Received: by mail-pf1-x442.google.com with SMTP id p10so9165865pff.3 for ; Tue, 26 Mar 2019 22:15:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=JhvJsPWXJwM2Pfve5Lpt97W7450dQJl67kKVjaSPIG4=; b=ITXjphFRO8aVzExsir18RToJnMaYMX68G8Id07Q34EWtZSNU0+dvsTtj3AMTbF+18T EBNzT6icB5av6qwvAN4LVw68Ama4RPa+F3YQR70/ZYKG1QpC/Whz2VBzoszeRSYM9P8I EEJ92V2VLsnAV+9BV4YtNen1fjcb5PMzegxLI= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=JhvJsPWXJwM2Pfve5Lpt97W7450dQJl67kKVjaSPIG4=; b=RDcaEezjY0o6N8CJH5te7dsM+srr6Tlnfg/3H06Jwq9ZwwnWAzIiVsD9xfvc1NhBSp XXXh9FUixI6LR5FAjF8IAOwjaQ0DXtq15L1obp2UgLNPuW+TulqCyn0d5Npq50YqOzTt 8jmd2Tj/gXoz+08dhqM6Fo7JDmHEvRP1832eN+nkkhiSl5lu0EOfGCb1Tw+KyL7bAXlJ 09NCJoiuf8DQUmthtIF+x5bN5ZHKZah33RzpUqmIIJcDCmHIq1iaU2Th4STUx3+U0SxJ LjbiADbhMSa0XVGMqp6MUBijy3xzCeYYr+qYt9cQidVMKffXFiNMqESEzQRwsl8asOtq U4Tg== X-Gm-Message-State: APjAAAW/J9kguyOuBKfDxOSumJ6FchTs1d56I0roCsyqNHtr5VwhQcvE AJ6BZ3b5PbYiUwZgUwu29PIDHw== X-Google-Smtp-Source: APXvYqyAvbXx7kaUeHEHTD+agVkUC1kwW2sGxQuQr9OSaR9Kjf7D0+JDMIvI4JZAnVM0SGP5l/DsXw== X-Received: by 2002:a63:e306:: with SMTP id f6mr33336513pgh.263.1553663725119; Tue, 26 Mar 2019 22:15:25 -0700 (PDT) Received: from pihsun-z840.tpe.corp.google.com ([2401:fa00:1:10:7889:7a43:f899:134c]) by smtp.googlemail.com with ESMTPSA id k72sm58622609pfb.122.2019.03.26.22.15.22 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 26 Mar 2019 22:15:24 -0700 (PDT) From: Peter Shih To: Subject: [PATCH v7 4/7] rpmsg: add rpmsg support for mt8183 SCP. Date: Wed, 27 Mar 2019 13:14:46 +0800 Message-Id: <20190327051450.16222-5-pihsun@chromium.org> X-Mailer: git-send-email 2.21.0.392.gf8f6787159e-goog In-Reply-To: <20190327051450.16222-1-pihsun@chromium.org> References: <20190327051450.16222-1-pihsun@chromium.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190326_221529_136805_83C05C8F X-CRM114-Status: GOOD ( 28.45 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Ohad Ben-Cohen , Nicolas Boichat , Erin Lo , "open list:REMOTE PROCESSOR REMOTEPROC SUBSYSTEM" , open list , Bjorn Andersson , "moderated list:ARM/Mediatek SoC support" , Pi-Hsun Shih , Matthias Brugger , "moderated list:ARM/Mediatek SoC support" Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Pi-Hsun Shih Add a simple rpmsg support for mt8183 SCP, that use IPI / IPC directly. Signed-off-by: Pi-Hsun Shih --- Changes from v6: - Decouple mtk_rpmsg from mtk_scp by putting all necessary informations (name service IPI id, register/unregister/send functions) into a struct, and pass it to the mtk_rpmsg_create_rproc_subdev function. Changes from v5: - CONFIG_MTK_SCP now selects CONFIG_RPMSG_MTK_SCP, and the dummy implementation for mtk_rpmsg_{create,destroy}_rproc_subdev when CONFIG_RPMSG_MTK_SCP is not defined is removed. Changes from v4: - Match and fill the device tree node to the created rpmsg subdevice, so the rpmsg subdevice can utilize the properties and subnodes on device tree (This is similar to what drivers/rpmsg/qcom_smd.c does). Changes from v3: - Change from unprepare to stop, to stop the rpmsg driver before the rproc is stopped, avoiding problem that some rpmsg would fail after rproc is stopped. - Add missing spin_lock_init, and use destroy_ept instead of kref_put. Changes from v2: - Unregiser IPI handler on unprepare. - Lock the channel list on operations. - Move SCP_IPI_NS_SERVICE to 0xFF. Changes from v1: - Do cleanup properly in mtk_rpmsg.c, which also removes the problem of short-lived work items. - Fix several issues checkpatch found. --- drivers/remoteproc/Kconfig | 1 + drivers/remoteproc/mtk_common.h | 2 + drivers/remoteproc/mtk_scp.c | 38 ++- drivers/remoteproc/mtk_scp_ipi.c | 1 + drivers/rpmsg/Kconfig | 9 + drivers/rpmsg/Makefile | 1 + drivers/rpmsg/mtk_rpmsg.c | 396 ++++++++++++++++++++++++++ include/linux/platform_data/mtk_scp.h | 4 +- include/linux/rpmsg/mtk_rpmsg.h | 30 ++ 9 files changed, 477 insertions(+), 5 deletions(-) create mode 100644 drivers/rpmsg/mtk_rpmsg.c create mode 100644 include/linux/rpmsg/mtk_rpmsg.h diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig index 92bd20d6b9cd..01182936f4fa 100644 --- a/drivers/remoteproc/Kconfig +++ b/drivers/remoteproc/Kconfig @@ -25,6 +25,7 @@ config IMX_REMOTEPROC config MTK_SCP tristate "Mediatek SCP support" depends on ARCH_MEDIATEK + select RPMSG_MTK_SCP help Say y here to support Mediatek's System Companion Processor (SCP) via the remote processor framework. diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h index 7504ae1bc0ef..19a907810271 100644 --- a/drivers/remoteproc/mtk_common.h +++ b/drivers/remoteproc/mtk_common.h @@ -54,6 +54,8 @@ struct mtk_scp { void __iomem *cpu_addr; phys_addr_t phys_addr; size_t dram_size; + + struct rproc_subdev *rpmsg_subdev; }; /** diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c index ca45cb729bd3..2c4847fcae10 100644 --- a/drivers/remoteproc/mtk_scp.c +++ b/drivers/remoteproc/mtk_scp.c @@ -13,6 +13,7 @@ #include #include #include +#include #include "mtk_common.h" #include "remoteproc_internal.h" @@ -472,6 +473,31 @@ static int scp_map_memory_region(struct mtk_scp *scp) return 0; } +static struct mtk_rpmsg_info mtk_scp_rpmsg_info = { + .send_ipi = scp_ipi_send, + .register_ipi = scp_ipi_register, + .unregister_ipi = scp_ipi_unregister, + .ns_ipi_id = SCP_IPI_NS_SERVICE, +}; + +static void scp_add_rpmsg_subdev(struct mtk_scp *scp) +{ + scp->rpmsg_subdev = + mtk_rpmsg_create_rproc_subdev(to_platform_device(scp->dev), + &mtk_scp_rpmsg_info); + if (scp->rpmsg_subdev) + rproc_add_subdev(scp->rproc, scp->rpmsg_subdev); +} + +static void scp_remove_rpmsg_subdev(struct mtk_scp *scp) +{ + if (scp->rpmsg_subdev) { + rproc_remove_subdev(scp->rproc, scp->rpmsg_subdev); + mtk_rpmsg_destroy_rproc_subdev(scp->rpmsg_subdev); + scp->rpmsg_subdev = NULL; + } +} + static int scp_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -553,22 +579,25 @@ static int scp_probe(struct platform_device *pdev) init_waitqueue_head(&scp->run.wq); init_waitqueue_head(&scp->ack_wq); + scp_add_rpmsg_subdev(scp); + ret = devm_request_threaded_irq(dev, platform_get_irq(pdev, 0), NULL, scp_irq_handler, IRQF_ONESHOT, pdev->name, scp); if (ret) { dev_err(dev, "failed to request irq\n"); - goto destroy_mutex; + goto remove_subdev; } ret = rproc_add(rproc); if (ret) - goto destroy_mutex; + goto remove_subdev; - return ret; + return 0; -destroy_mutex: +remove_subdev: + scp_remove_rpmsg_subdev(scp); mutex_destroy(&scp->lock); free_rproc: rproc_free(rproc); @@ -580,6 +609,7 @@ static int scp_remove(struct platform_device *pdev) { struct mtk_scp *scp = platform_get_drvdata(pdev); + scp_remove_rpmsg_subdev(scp); rproc_del(scp->rproc); rproc_free(scp->rproc); diff --git a/drivers/remoteproc/mtk_scp_ipi.c b/drivers/remoteproc/mtk_scp_ipi.c index f5d271c0f623..10b0cbda7aee 100644 --- a/drivers/remoteproc/mtk_scp_ipi.c +++ b/drivers/remoteproc/mtk_scp_ipi.c @@ -99,6 +99,7 @@ int scp_ipi_send(struct platform_device *pdev, int ret; if (WARN_ON(id <= SCP_IPI_INIT) || WARN_ON(id >= SCP_IPI_MAX) || + WARN_ON(id == SCP_IPI_NS_SERVICE) || WARN_ON(len > sizeof(send_obj->share_buf)) || WARN_ON(!buf)) return -EINVAL; diff --git a/drivers/rpmsg/Kconfig b/drivers/rpmsg/Kconfig index d0322b41eca5..85e3cc075cb4 100644 --- a/drivers/rpmsg/Kconfig +++ b/drivers/rpmsg/Kconfig @@ -15,6 +15,15 @@ config RPMSG_CHAR in /dev. They make it possible for user-space programs to send and receive rpmsg packets. +config RPMSG_MTK_SCP + tristate "MediaTek SCP" + depends on MTK_SCP + select RPMSG + help + Say y here to enable support providing communication channels to + remote processors in MediaTek platforms. + This use IPI and IPC to communicate with remote processors. + config RPMSG_QCOM_GLINK_NATIVE tristate select RPMSG diff --git a/drivers/rpmsg/Makefile b/drivers/rpmsg/Makefile index 9aa859502d27..ae92a7fb08f6 100644 --- a/drivers/rpmsg/Makefile +++ b/drivers/rpmsg/Makefile @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 obj-$(CONFIG_RPMSG) += rpmsg_core.o obj-$(CONFIG_RPMSG_CHAR) += rpmsg_char.o +obj-$(CONFIG_RPMSG_MTK_SCP) += mtk_rpmsg.o obj-$(CONFIG_RPMSG_QCOM_GLINK_RPM) += qcom_glink_rpm.o obj-$(CONFIG_RPMSG_QCOM_GLINK_NATIVE) += qcom_glink_native.o obj-$(CONFIG_RPMSG_QCOM_GLINK_SMEM) += qcom_glink_smem.o diff --git a/drivers/rpmsg/mtk_rpmsg.c b/drivers/rpmsg/mtk_rpmsg.c new file mode 100644 index 000000000000..e5e988941ea6 --- /dev/null +++ b/drivers/rpmsg/mtk_rpmsg.c @@ -0,0 +1,396 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Copyright 2018 Google LLC. + +#include +#include +#include +#include +#include +#include +#include + +#include "rpmsg_internal.h" + +struct mtk_rpmsg_rproc_subdev { + struct platform_device *pdev; + struct mtk_rpmsg_info *info; + struct rpmsg_endpoint *ns_ept; + struct rproc_subdev subdev; + + struct work_struct register_work; + struct list_head channels; + struct mutex channels_lock; +}; + +#define to_mtk_subdev(d) container_of(d, struct mtk_rpmsg_rproc_subdev, subdev) + +struct mtk_rpmsg_channel_info { + struct rpmsg_channel_info info; + bool registered; + struct list_head list; +}; + +/** + * struct rpmsg_ns_msg - dynamic name service announcement message + * @name: name of remote service that is published + * @addr: address of remote service that is published + * + * This message is sent across to publish a new service. When we receive these + * messages, an appropriate rpmsg channel (i.e device) is created. In turn, the + * ->probe() handler of the appropriate rpmsg driver will be invoked + * (if/as-soon-as one is registered). + */ +struct rpmsg_ns_msg { + char name[RPMSG_NAME_SIZE]; + u32 addr; +} __packed; + +struct mtk_rpmsg_device { + struct rpmsg_device rpdev; + struct mtk_rpmsg_rproc_subdev *mtk_subdev; +}; + +struct mtk_rpmsg_endpoint { + struct rpmsg_endpoint ept; + struct mtk_rpmsg_rproc_subdev *mtk_subdev; +}; + +#define to_mtk_rpmsg_device(r) container_of(r, struct mtk_rpmsg_device, rpdev) +#define to_mtk_rpmsg_endpoint(r) container_of(r, struct mtk_rpmsg_endpoint, ept) + +static const struct rpmsg_endpoint_ops mtk_rpmsg_endpoint_ops; + +static void __ept_release(struct kref *kref) +{ + struct rpmsg_endpoint *ept = container_of(kref, struct rpmsg_endpoint, + refcount); + kfree(to_mtk_rpmsg_endpoint(ept)); +} + +static void mtk_rpmsg_ipi_handler(void *data, unsigned int len, void *priv) +{ + struct mtk_rpmsg_endpoint *mept = priv; + struct rpmsg_endpoint *ept = &mept->ept; + int ret; + + ret = (*ept->cb)(ept->rpdev, data, len, ept->priv, ept->addr); + if (ret) + dev_warn(&ept->rpdev->dev, "rpmsg handler return error = %d", + ret); +} + +static struct rpmsg_endpoint * +__rpmsg_create_ept(struct mtk_rpmsg_rproc_subdev *mtk_subdev, + struct rpmsg_device *rpdev, rpmsg_rx_cb_t cb, void *priv, + u32 id) +{ + struct mtk_rpmsg_endpoint *mept; + struct rpmsg_endpoint *ept; + struct platform_device *pdev = mtk_subdev->pdev; + int ret; + + mept = kzalloc(sizeof(*mept), GFP_KERNEL); + if (!mept) + return NULL; + mept->mtk_subdev = mtk_subdev; + + ept = &mept->ept; + kref_init(&ept->refcount); + + ept->rpdev = rpdev; + ept->cb = cb; + ept->priv = priv; + ept->ops = &mtk_rpmsg_endpoint_ops; + ept->addr = id; + + ret = mtk_subdev->info->register_ipi(pdev, id, mtk_rpmsg_ipi_handler, + mept); + if (ret) { + dev_err(&pdev->dev, "IPI register failed, id = %d", id); + kref_put(&ept->refcount, __ept_release); + return NULL; + } + + return ept; +} + +static struct rpmsg_endpoint * +mtk_rpmsg_create_ept(struct rpmsg_device *rpdev, rpmsg_rx_cb_t cb, void *priv, + struct rpmsg_channel_info chinfo) +{ + struct mtk_rpmsg_rproc_subdev *mtk_subdev = + to_mtk_rpmsg_device(rpdev)->mtk_subdev; + + return __rpmsg_create_ept(mtk_subdev, rpdev, cb, priv, chinfo.src); +} + +static void mtk_rpmsg_destroy_ept(struct rpmsg_endpoint *ept) +{ + struct mtk_rpmsg_rproc_subdev *mtk_subdev = + to_mtk_rpmsg_endpoint(ept)->mtk_subdev; + + mtk_subdev->info->unregister_ipi(mtk_subdev->pdev, ept->addr); + kref_put(&ept->refcount, __ept_release); +} + +static int mtk_rpmsg_send(struct rpmsg_endpoint *ept, void *data, int len) +{ + struct mtk_rpmsg_rproc_subdev *mtk_subdev = + to_mtk_rpmsg_endpoint(ept)->mtk_subdev; + + return mtk_subdev->info->send_ipi(mtk_subdev->pdev, ept->addr, data, + len, 0); +} + +static int mtk_rpmsg_trysend(struct rpmsg_endpoint *ept, void *data, int len) +{ + struct mtk_rpmsg_rproc_subdev *mtk_subdev = + to_mtk_rpmsg_endpoint(ept)->mtk_subdev; + + /* + * TODO: This currently is same as mtk_rpmsg_send, and wait until SCP + * received the last command. + */ + return mtk_subdev->info->send_ipi(mtk_subdev->pdev, ept->addr, data, + len, 0); +} + +static const struct rpmsg_endpoint_ops mtk_rpmsg_endpoint_ops = { + .destroy_ept = mtk_rpmsg_destroy_ept, + .send = mtk_rpmsg_send, + .trysend = mtk_rpmsg_trysend, +}; + +static void mtk_rpmsg_release_device(struct device *dev) +{ + struct rpmsg_device *rpdev = to_rpmsg_device(dev); + struct mtk_rpmsg_device *mdev = to_mtk_rpmsg_device(rpdev); + + kfree(mdev); +} + +static const struct rpmsg_device_ops mtk_rpmsg_device_ops = { + .create_ept = mtk_rpmsg_create_ept, +}; + +static struct device_node * +mtk_rpmsg_match_device_subnode(struct device_node *node, const char *channel) +{ + struct device_node *child; + const char *name; + int ret; + + for_each_available_child_of_node(node, child) { + ret = of_property_read_string(child, "mtk,rpmsg-name", &name); + if (ret) + continue; + + if (strcmp(name, channel) == 0) + return child; + } + + return NULL; +} + +static int mtk_rpmsg_register_device(struct mtk_rpmsg_rproc_subdev *mtk_subdev, + struct rpmsg_channel_info *info) +{ + struct rpmsg_device *rpdev; + struct mtk_rpmsg_device *mdev; + struct platform_device *pdev = mtk_subdev->pdev; + int ret; + + mdev = kzalloc(sizeof(*mdev), GFP_KERNEL); + if (!mdev) + return -ENOMEM; + + mdev->mtk_subdev = mtk_subdev; + + rpdev = &mdev->rpdev; + rpdev->ops = &mtk_rpmsg_device_ops; + rpdev->src = info->src; + rpdev->dst = info->dst; + strncpy(rpdev->id.name, info->name, RPMSG_NAME_SIZE); + + rpdev->dev.of_node = + mtk_rpmsg_match_device_subnode(pdev->dev.of_node, info->name); + rpdev->dev.parent = &pdev->dev; + rpdev->dev.release = mtk_rpmsg_release_device; + + ret = rpmsg_register_device(rpdev); + if (ret) { + kfree(mdev); + return ret; + } + + return 0; +} + +static void mtk_register_device_work_function(struct work_struct *register_work) +{ + struct mtk_rpmsg_rproc_subdev *subdev = container_of( + register_work, struct mtk_rpmsg_rproc_subdev, register_work); + struct platform_device *pdev = subdev->pdev; + struct mtk_rpmsg_channel_info *info; + int ret; + + mutex_lock(&subdev->channels_lock); + list_for_each_entry(info, &subdev->channels, list) { + if (info->registered) + continue; + + ret = mtk_rpmsg_register_device(subdev, &info->info); + if (ret) { + dev_err(&pdev->dev, "Can't create rpmsg_device\n"); + continue; + } + + info->registered = true; + } + mutex_unlock(&subdev->channels_lock); +} + +static int mtk_rpmsg_create_device(struct mtk_rpmsg_rproc_subdev *mtk_subdev, + char *name, u32 addr) +{ + struct mtk_rpmsg_channel_info *info; + + info = kzalloc(sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + strncpy(info->info.name, name, RPMSG_NAME_SIZE); + info->info.src = addr; + info->info.dst = RPMSG_ADDR_ANY; + mutex_lock(&mtk_subdev->channels_lock); + list_add(&info->list, &mtk_subdev->channels); + mutex_unlock(&mtk_subdev->channels_lock); + + schedule_work(&mtk_subdev->register_work); + return 0; +} + +static int mtk_rpmsg_ns_cb(struct rpmsg_device *rpdev, void *data, int len, + void *priv, u32 src) +{ + struct rpmsg_ns_msg *msg = data; + struct mtk_rpmsg_rproc_subdev *mtk_subdev = priv; + struct device *dev = &mtk_subdev->pdev->dev; + + int ret; + + if (len != sizeof(*msg)) { + dev_err(dev, "malformed ns msg (%d)\n", len); + return -EINVAL; + } + + /* + * the name service ept does _not_ belong to a real rpmsg channel, + * and is handled by the rpmsg bus itself. + * for sanity reasons, make sure a valid rpdev has _not_ sneaked + * in somehow. + */ + if (rpdev) { + dev_err(dev, "anomaly: ns ept has an rpdev handle\n"); + return -EINVAL; + } + + /* don't trust the remote processor for null terminating the name */ + msg->name[RPMSG_NAME_SIZE - 1] = '\0'; + + dev_info(dev, "creating channel %s addr 0x%x\n", msg->name, msg->addr); + + ret = mtk_rpmsg_create_device(mtk_subdev, msg->name, msg->addr); + if (ret) { + dev_err(dev, "create rpmsg device failed\n"); + return ret; + } + + return 0; +} + +int mtk_rpmsg_prepare(struct rproc_subdev *subdev) +{ + struct mtk_rpmsg_rproc_subdev *mtk_subdev = to_mtk_subdev(subdev); + + /* a dedicated endpoint handles the name service msgs */ + if (mtk_subdev->info->ns_ipi_id >= 0) { + mtk_subdev->ns_ept = + __rpmsg_create_ept(mtk_subdev, NULL, mtk_rpmsg_ns_cb, + mtk_subdev, + mtk_subdev->info->ns_ipi_id); + if (!mtk_subdev->ns_ept) { + dev_err(&mtk_subdev->pdev->dev, + "failed to create name service endpoint\n"); + return -ENOMEM; + } + } + + return 0; +} + +void mtk_rpmsg_stop(struct rproc_subdev *subdev, bool crashed) +{ + struct mtk_rpmsg_channel_info *info, *next; + struct mtk_rpmsg_rproc_subdev *mtk_subdev = to_mtk_subdev(subdev); + struct device *dev = &mtk_subdev->pdev->dev; + + if (mtk_subdev->ns_ept) + mtk_rpmsg_destroy_ept(mtk_subdev->ns_ept); + cancel_work_sync(&mtk_subdev->register_work); + + mutex_lock(&mtk_subdev->channels_lock); + list_for_each_entry(info, &mtk_subdev->channels, list) { + if (!info->registered) + continue; + if (rpmsg_unregister_device(dev, &info->info)) { + dev_warn( + dev, + "rpmsg_unregister_device failed for %s.%d.%d\n", + info->info.name, info->info.src, + info->info.dst); + } + } + + list_for_each_entry_safe(info, next, + &mtk_subdev->channels, list) { + list_del(&info->list); + kfree(info); + } + mutex_unlock(&mtk_subdev->channels_lock); +} + +struct rproc_subdev * +mtk_rpmsg_create_rproc_subdev(struct platform_device *pdev, + struct mtk_rpmsg_info *info) +{ + struct mtk_rpmsg_rproc_subdev *mtk_subdev; + + mtk_subdev = kzalloc(sizeof(*mtk_subdev), GFP_KERNEL); + if (!mtk_subdev) + return NULL; + + mtk_subdev->pdev = pdev; + mtk_subdev->subdev.prepare = mtk_rpmsg_prepare; + mtk_subdev->subdev.stop = mtk_rpmsg_stop; + mtk_subdev->info = info; + INIT_LIST_HEAD(&mtk_subdev->channels); + INIT_WORK(&mtk_subdev->register_work, + mtk_register_device_work_function); + mutex_init(&mtk_subdev->channels_lock); + + return &mtk_subdev->subdev; +} +EXPORT_SYMBOL_GPL(mtk_rpmsg_create_rproc_subdev); + +void mtk_rpmsg_destroy_rproc_subdev(struct rproc_subdev *subdev) +{ + struct mtk_rpmsg_rproc_subdev *mtk_subdev = to_mtk_subdev(subdev); + + kfree(mtk_subdev); +} +EXPORT_SYMBOL_GPL(mtk_rpmsg_destroy_rproc_subdev); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("MediaTek scp rpmsg driver"); diff --git a/include/linux/platform_data/mtk_scp.h b/include/linux/platform_data/mtk_scp.h index 7625eede2e58..e26e5f6146e6 100644 --- a/include/linux/platform_data/mtk_scp.h +++ b/include/linux/platform_data/mtk_scp.h @@ -34,9 +34,11 @@ enum scp_ipi_id { SCP_IPI_VENC_VP8, SCP_IPI_MDP, SCP_IPI_CROS_HOST_CMD, - SCP_IPI_MAX, + SCP_IPI_NS_SERVICE = 0xFF, + SCP_IPI_MAX = 0x100, }; + /** * scp_ipi_register - register an ipi function * diff --git a/include/linux/rpmsg/mtk_rpmsg.h b/include/linux/rpmsg/mtk_rpmsg.h new file mode 100644 index 000000000000..90f848696161 --- /dev/null +++ b/include/linux/rpmsg/mtk_rpmsg.h @@ -0,0 +1,30 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright 2018 Google LLC. + */ + +#ifndef __LINUX_RPMSG_MTK_RPMSG_H +#define __LINUX_RPMSG_MTK_RPMSG_H + +#include +#include + +typedef void (*ipi_handler_t)(void *data, unsigned int len, void *priv); + +/* TODO: Document */ +struct mtk_rpmsg_info { + int (*register_ipi)(struct platform_device *pdev, u32 id, + ipi_handler_t handler, void *priv); + void (*unregister_ipi)(struct platform_device *pdev, u32 id); + int (*send_ipi)(struct platform_device *pdev, u32 id, + void *buf, unsigned int len, unsigned int wait); + int ns_ipi_id; +}; + +struct rproc_subdev * +mtk_rpmsg_create_rproc_subdev(struct platform_device *pdev, + struct mtk_rpmsg_info *info); + +void mtk_rpmsg_destroy_rproc_subdev(struct rproc_subdev *subdev); + +#endif