From patchwork Thu Sep 22 14:59:56 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Emekcan Aras X-Patchwork-Id: 13138 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 aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2C39EC54EE9 for ; Thu, 22 Sep 2022 15:00:16 +0000 (UTC) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by mx.groups.io with SMTP id smtpd.web12.50.1663858808247825203 for ; Thu, 22 Sep 2022 08:00:08 -0700 Authentication-Results: mx.groups.io; dkim=missing; spf=pass (domain: arm.com, ip: 217.140.110.172, mailfrom: emekcan.aras@arm.com) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 34A3316F8; Thu, 22 Sep 2022 08:00:14 -0700 (PDT) Received: from cassini-003.cambridge.arm.com (cassini-003.cambridge.arm.com [10.1.198.48]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id D6D553F73D; Thu, 22 Sep 2022 08:00:06 -0700 (PDT) From: emekcan.aras@arm.com To: meta-arm@lists.yoctoproject.org, Jon.Mason@arm.com, Ross.Burton@arm.com Cc: nd@arm.com, Emekcan Subject: [PATCH 2/2] arm-bsp/kernel: Add rpmsg_arm_mailbox to corstone1000 Date: Thu, 22 Sep 2022 15:59:56 +0100 Message-Id: <20220922145956.56063-3-emekcan.aras@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220922145956.56063-1-emekcan.aras@arm.com> References: <20220922145956.56063-1-emekcan.aras@arm.com> List-Id: X-Webhook-Received: from li982-79.members.linode.com [45.33.32.79] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Thu, 22 Sep 2022 15:00:16 -0000 X-Groupsio-URL: https://lists.yoctoproject.org/g/meta-arm/message/3813 From: Emekcan Adds out-of-tree rpmsg_arm_mailbox driver patches into linux kernel to communicate with external system using MHUs in corstone1000 platform. The host can communicate with external system using the driver under /dev/rpmsg0_ctrl0. Signed-off-by: Emekcan Aras --- ...03-Add-rpsmg-driver-for-corstone1000.patch | 222 ++++++++++++++++++ .../linux/files/corstone1000/defconfig | 7 +- .../linux/linux-arm-platforms.inc | 1 + 3 files changed, 229 insertions(+), 1 deletion(-) create mode 100644 meta-arm-bsp/recipes-kernel/linux/files/corstone1000/0003-Add-rpsmg-driver-for-corstone1000.patch diff --git a/meta-arm-bsp/recipes-kernel/linux/files/corstone1000/0003-Add-rpsmg-driver-for-corstone1000.patch b/meta-arm-bsp/recipes-kernel/linux/files/corstone1000/0003-Add-rpsmg-driver-for-corstone1000.patch new file mode 100644 index 00000000..d88acfc0 --- /dev/null +++ b/meta-arm-bsp/recipes-kernel/linux/files/corstone1000/0003-Add-rpsmg-driver-for-corstone1000.patch @@ -0,0 +1,222 @@ +Upstream-Status: Pending [Not submitted to upstream yet] +Signed-off-by: Emekcan Aras + +From e683c37ee51717e625c8a598056cf4bb1bdadcbc Mon Sep 17 00:00:00 2001 +From: Emekcan +Date: Wed, 17 Aug 2022 14:21:42 +0100 +Subject: [PATCH] Add rpsmg driver for corstone1000 + +Adds rpsmg driver to communicate with external +system in corstone1000 platform. + +Signed-off-by: Emekcan Aras +--- + drivers/rpmsg/Kconfig | 10 ++ + drivers/rpmsg/Makefile | 1 + + drivers/rpmsg/rpmsg_arm_mailbox.c | 164 ++++++++++++++++++++++ + 3 files changed, 175 insertions(+) + create mode 100644 drivers/rpmsg/rpmsg_arm_mailbox.c + +diff --git a/drivers/rpmsg/Kconfig b/drivers/rpmsg/Kconfig +index 0b4407abdf13..c276bd17bffe 100644 +--- a/drivers/rpmsg/Kconfig ++++ b/drivers/rpmsg/Kconfig +@@ -73,4 +73,14 @@ config RPMSG_VIRTIO + select RPMSG_NS + select VIRTIO + ++config RPMSG_ARM ++ tristate "ARM RPMSG driver" ++ select RPMSG ++ depends on HAS_IOMEM ++ depends on MAILBOX ++ help ++ Say y here to enable support for rpmsg lient driver which is built ++ around mailbox client using Arm MHUv2.1 as physical medium.This ++ driver enables communication which remote processor using MHU. ++ + endmenu +diff --git a/drivers/rpmsg/Makefile b/drivers/rpmsg/Makefile +index 8d452656f0ee..34e9c146cd64 100644 +--- a/drivers/rpmsg/Makefile ++++ b/drivers/rpmsg/Makefile +@@ -1,5 +1,6 @@ + # SPDX-License-Identifier: GPL-2.0 + obj-$(CONFIG_RPMSG) += rpmsg_core.o ++obj-$(CONFIG_RPMSG_ARM) += rpmsg_arm_mailbox.o + obj-$(CONFIG_RPMSG_CHAR) += rpmsg_char.o + obj-$(CONFIG_RPMSG_NS) += rpmsg_ns.o + obj-$(CONFIG_RPMSG_MTK_SCP) += mtk_rpmsg.o +diff --git a/drivers/rpmsg/rpmsg_arm_mailbox.c b/drivers/rpmsg/rpmsg_arm_mailbox.c +new file mode 100644 +index 000000000000..4a80102669f6 +--- /dev/null ++++ b/drivers/rpmsg/rpmsg_arm_mailbox.c +@@ -0,0 +1,164 @@ ++// SPDX-License-Identifier: GPL-2.0 ++/* ++ * rpmsg client driver using mailbox client interface ++ * ++ * Copyright (C) 2019 ARM Ltd. ++ * ++ */ ++ ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include "rpmsg_internal.h" ++#include ++ ++#define RPMSG_NAME "arm_rpmsg" ++#define RPMSG_ADDR_ANY 0xFFFFFFFF ++ ++struct arm_channel { ++ struct rpmsg_endpoint ept; ++ struct mbox_client cl; ++ struct mbox_chan *mbox; ++}; ++ ++#define arm_channel_from_rpmsg(_ept) container_of(_ept, struct arm_channel, ept) ++#define arm_channel_from_mbox(_ept) container_of(_ept, struct arm_channel, cl) ++ ++ ++static void arm_msg_rx_handler(struct mbox_client *cl, void *mssg) ++{ ++ struct arm_mhuv2_mbox_msg *msg = mssg; ++ struct arm_channel* channel = arm_channel_from_mbox(cl); ++ int err = channel->ept.cb(channel->ept.rpdev, msg->data, 4, channel->ept.priv, RPMSG_ADDR_ANY); ++ if(err) { ++ printk("ARM Mailbox: Endpoint callback failed with error: %d", err); ++ } ++} ++ ++ ++static void arm_destroy_ept(struct rpmsg_endpoint *ept) ++{ ++ struct arm_channel *channel = arm_channel_from_rpmsg(ept); ++ mbox_free_channel(channel->mbox); ++ kfree(channel); ++} ++ ++static int arm_send(struct rpmsg_endpoint *ept, void *data, int len) ++{ ++ struct arm_channel *channel = arm_channel_from_rpmsg(ept); ++ ++ mbox_send_message(channel->mbox, data); ++ return 0; ++} ++ ++static int arm_sendto(struct rpmsg_endpoint *ept, void *data, int len, u32 dest) ++{ ++ struct arm_mhuv2_mbox_msg msg; ++ struct arm_channel *channel = arm_channel_from_rpmsg(ept); ++ msg.data = data; ++ msg.len = len; ++ mbox_send_message(channel->mbox, &msg); ++ return 0; ++} ++ ++ ++static const struct rpmsg_endpoint_ops arm_endpoint_ops = { ++ .destroy_ept = arm_destroy_ept, ++ .send = arm_send, ++ .sendto = arm_sendto, ++}; ++ ++ ++static struct rpmsg_endpoint *arm_create_ept(struct rpmsg_device *rpdev, ++ rpmsg_rx_cb_t cb, void *priv, struct rpmsg_channel_info chinfo) ++{ ++ struct arm_channel *channel; ++ ++ channel = kzalloc(sizeof(*channel), GFP_KERNEL); ++ ++ // Initialize rpmsg endpoint ++ kref_init(&channel->ept.refcount); ++ channel->ept.rpdev = rpdev; ++ channel->ept.cb = cb; ++ channel->ept.priv = priv; ++ channel->ept.ops = &arm_endpoint_ops; ++ ++ // Initialize mailbox client ++ channel->cl.dev = rpdev->dev.parent; ++ channel->cl.rx_callback = arm_msg_rx_handler; ++ channel->cl.tx_done = NULL; /* operate in blocking mode */ ++ channel->cl.tx_block = true; ++ channel->cl.tx_tout = 500; /* by half a second */ ++ channel->cl.knows_txdone = false; /* depending upon protocol */ ++ ++ channel->mbox = mbox_request_channel_byname(&channel->cl, chinfo.name); ++ if (IS_ERR_OR_NULL(channel->mbox)) { ++ printk("RPMsg ARM: Cannot get channel by name: '%s'\n", chinfo.name); ++ return -1; ++ } ++ ++ return &channel->ept; ++} ++ ++static const struct rpmsg_device_ops arm_device_ops = { ++ .create_ept = arm_create_ept, ++}; ++ ++ ++static void arm_release_device(struct device *dev) ++{ ++ struct rpmsg_device *rpdev = to_rpmsg_device(dev); ++ ++ kfree(rpdev); ++} ++ ++ ++static int client_probe(struct platform_device *pdev) ++{ ++ struct device *dev = &pdev->dev; ++ struct rpmsg_device *rpdev; ++ ++ rpdev = kzalloc(sizeof(*rpdev), GFP_KERNEL); ++ if (!rpdev) ++ return -ENOMEM; ++ ++ /* Assign callbacks for rpmsg_device */ ++ rpdev->ops = &arm_device_ops; ++ ++ /* Assign public information to the rpmsg_device */ ++ memcpy(rpdev->id.name, RPMSG_NAME, strlen(RPMSG_NAME)); ++ ++ rpdev->dev.parent = dev; ++ rpdev->dev.release = arm_release_device; ++ ++ return rpmsg_chrdev_register_device(rpdev); ++} ++ ++static const struct of_device_id client_of_match[] = { ++ { .compatible = "arm,client", .data = NULL }, ++ { /* Sentinel */ }, ++}; ++ ++static struct platform_driver client_driver = { ++ .driver = { ++ .name = "arm-mhu-client", ++ .of_match_table = client_of_match, ++ }, ++ .probe = client_probe, ++}; ++ ++module_platform_driver(client_driver); ++ ++MODULE_LICENSE("GPL v2"); ++MODULE_DESCRIPTION("ARM RPMSG Driver"); ++MODULE_AUTHOR("Tushar Khandelwal "); +-- +2.17.1 + diff --git a/meta-arm-bsp/recipes-kernel/linux/files/corstone1000/defconfig b/meta-arm-bsp/recipes-kernel/linux/files/corstone1000/defconfig index 095cc257..0cdd3fa4 100644 --- a/meta-arm-bsp/recipes-kernel/linux/files/corstone1000/defconfig +++ b/meta-arm-bsp/recipes-kernel/linux/files/corstone1000/defconfig @@ -92,4 +92,9 @@ CONFIG_LIBCRC32C=y CONFIG_DEBUG_FS=y CONFIG_PANIC_TIMEOUT=5 CONFIG_STACKTRACE=y -CONFIG_EXTSYS_CTRL=y \ No newline at end of file +CONFIG_EXTSYS_CTRL=y +CONFIG_MAILBOX=y +CONFIG_ARM_MHU_V2=y +CONFIG_RPMSG=y +CONFIG_RPMSG_CHAR=y +CONFIG_RPMSG_ARM=y diff --git a/meta-arm-bsp/recipes-kernel/linux/linux-arm-platforms.inc b/meta-arm-bsp/recipes-kernel/linux/linux-arm-platforms.inc index c44d5883..4a6cc438 100644 --- a/meta-arm-bsp/recipes-kernel/linux/linux-arm-platforms.inc +++ b/meta-arm-bsp/recipes-kernel/linux/linux-arm-platforms.inc @@ -42,6 +42,7 @@ SRC_URI:append:corstone1000 = " \ file://defconfig \ file://0001-UPSTREAM-firmware-arm_ffa-Handle-compatibility-with-.patch \ file://0002-Add-external-system-driver.patch \ + file://0003-Add-rpsmg-driver-for-corstone1000.patch \ " SRC_URI:append:corstone1000 = " ${@bb.utils.contains('MACHINE_FEATURES', \