From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 66671C2BB85 for ; Sun, 12 Apr 2020 11:24:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4BFED206E9 for ; Sun, 12 Apr 2020 11:24:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727030AbgDLLYh (ORCPT ); Sun, 12 Apr 2020 07:24:37 -0400 Received: from m17618.mail.qiye.163.com ([59.111.176.18]:7553 "EHLO m17618.mail.qiye.163.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727003AbgDLLYg (ORCPT ); Sun, 12 Apr 2020 07:24:36 -0400 Received: from ubuntu.localdomain (unknown [58.251.74.227]) by m17618.mail.qiye.163.com (Hmail) with ESMTPA id 78AC34E160D; Sun, 12 Apr 2020 19:24:33 +0800 (CST) From: Wang Wenhu To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org Cc: rdunlap@infradead.org, kernel@vivo.com, Wang Wenhu Subject: [PATCH v2,3/3] driver: rpmon: add rpmon_qmi driver Date: Sun, 12 Apr 2020 04:24:05 -0700 Message-Id: <20200412112405.24116-4-wenhu.wang@vivo.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200412112405.24116-1-wenhu.wang@vivo.com> References: <20200411095301.18780-1-wenhu.wang@vivo.com> <20200412112405.24116-1-wenhu.wang@vivo.com> X-HM-Spam-Status: e1kfGhgUHx5ZQUtXWQgYFAkeWUFZSFVPS0xCQkJCQklITEtNSllXWShZQU hPN1dZLVlBSVdZCQ4XHghZQVk1NCk2OjckKS43PlkG X-HM-Sender-Digest: e1kMHhlZQR0aFwgeV1kSHx4VD1lBWUc6PE06HSo4ITgzNBQKCy4hIU4P TDoaCjxVSlVKTkNNTUJLTUxIQ0xCVTMWGhIXVQweFRMOVQwaFRw7DRINFFUYFBZFWVdZEgtZQVlO Q1VJTkpVTE9VSUlMWVdZCAFZQUpPQk5JNwY+ X-HM-Tid: 0a716e224bf89376kuws78ac34e160d Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Implements a kind of communication routine for RPMON to communicate with remote processors through QMI infrastructure. RPMON_QMI itself is designed as a modular framework that would introduce different kind of message sets binding to different services. RPMON_QMI creates a device of rpmon_device type for each remote processor endpoint. All the endpoint devices share an unique set of QMI suite. Signed-off-by: Wang Wenhu --- Changes since v1: - Addressed review comments from Randy --- drivers/rpmon/Kconfig | 15 ++ drivers/rpmon/Makefile | 1 + drivers/rpmon/rpmon_qmi.c | 431 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 447 insertions(+) create mode 100644 drivers/rpmon/rpmon_qmi.c diff --git a/drivers/rpmon/Kconfig b/drivers/rpmon/Kconfig index 0b80236ad186..fc44d3e803c1 100644 --- a/drivers/rpmon/Kconfig +++ b/drivers/rpmon/Kconfig @@ -23,6 +23,21 @@ config RPMON Currently RPMON_QMI is available which uses QMI infrastructures on Qualcomm SoC Platforms. +config RPMON_QMI + tristate "RPMON QMI Driver Engine" + select RPMON_QMI_MSG_V1 + depends on RPMON + depends on QCOM_QMI_HELPERS + help + RPMON_QMI is used by RPMON to communicate with remote processors + with QMI APIs if enabled. RPMON_QMI itself is designed as a modular + framework that would introduce different kinds of message sets + which may be updated for versions. + + RPMON_QMI creates a device of rpmon_device type for each remote + processor endpoint. All the endpoint devices shares an unique set + of QMI suite. + config RPMON_QMI_MSG_V1 tristate "RPMON QMI Message Version 1.0" depends on RPMON diff --git a/drivers/rpmon/Makefile b/drivers/rpmon/Makefile index 25f468a73a20..76d9525339d9 100644 --- a/drivers/rpmon/Makefile +++ b/drivers/rpmon/Makefile @@ -1,2 +1,3 @@ obj-$(CONFIG_RPMON) += rpmon.o +obj-$(CONFIG_RPMON_QMI) += rpmon_qmi.o obj-$(CONFIG_RPMON_QMI_MSG_V1) += rpmon_qmi_msg_v1.o diff --git a/drivers/rpmon/rpmon_qmi.c b/drivers/rpmon/rpmon_qmi.c new file mode 100644 index 000000000000..fe3b48c23cb9 --- /dev/null +++ b/drivers/rpmon/rpmon_qmi.c @@ -0,0 +1,431 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2020 Vivo Communication Technology Co. Ltd. + * Copyright (C) 2020 Wang Wenhu + * All rights reserved. + * + * RPMON: An implementation of remote processor monitor framework + * for modern SoCs that typically have heterogeneous remote processor + * devices in asymmetric multiprocessing configurations. It is + * implemented with chardev and sysfs class, which act as interfaces + * to communicate with user level. It supports different communication + * interfaces added modularly to communicate with remote processors. + * + * RPMON_QMI: Implements a kind of communication routine for RPMON + * to communicate with remote processors through QMI infrastructure. + * At least one set of RPMON_QMI_MSG should be available and RPMON_QMI + * initiates with the message set(s) to provide certain servicei(s) + * like stability checking of remote processors. Currently a set of + * messages, implemented by RPMON_QMI_MSG_V1 is available. + */ + +#include +#include +#include +#include +#include +#include "rpmon_qmi.h" + +#define DRIVER_NAME "rpmon_qmi_drv" + +/* Remote processor registered. */ +#define RP_REGISTERED 0x0001 + +/* work struct for message processing. */ +struct recv_work { + struct work_struct work; + struct sockaddr_qrtr sq; + void *msg; +}; + +/* Delayed work to take a reset action when a failure is detected. */ +struct exec_cb_work { + struct delayed_work dwk; + struct rpmon_qmi_device *rdev; + u32 checks; +}; + +struct rpmon_qmi_exec_fn { + int (*exec_call)(struct rpmon_qmi_device *rdev); +}; + +struct rpmon_qmi_cb_fn { + void (*callback)(struct work_struct *work); + u32 msg_len; +}; + +static DEFINE_MUTEX(rdev_list_lock); +static LIST_HEAD(rdev_list); +static struct rpmon_qmi *rpqmi; +static struct workqueue_struct *rpqmi_wq; + +static void rpmon_qmi_register_req_cb(struct work_struct *work) +{ + struct rpmon_register_req *req; + struct rpmon_qmi_device *rdev; + struct recv_work *rwk = container_of(work, struct recv_work, work); + + req = (struct rpmon_register_req *)rwk->msg; + + mutex_lock(&rdev_list_lock); + list_for_each_entry(rdev, &rdev_list, list) { + if (strncmp(rdev->info->name, req->name, RP_NAME_LEN)) + continue; + + rdev->flag |= RP_REGISTERED; + memcpy(&rdev->addr, &rwk->sq, sizeof(rwk->sq)); + if (req->timeout_valid) + rdev->timeout = req->timeout; + else + rdev->timeout = 5000; + rpmon_event_notify(rdev->info, RPMON_EVENT_REGISTER); + break; + } + mutex_unlock(&rdev_list_lock); + + kfree(rwk->msg); + kfree(rwk); +} + +void rpmon_qmi_conn_check_resp_cb(struct work_struct *work) +{ + struct rpmon_conn_check_resp *cc_resp; + struct rpmon_qmi_device *rdev; + struct sockaddr_qrtr *addr; + struct recv_work *rwk = + container_of(work, struct recv_work, work); + + cc_resp = (struct rpmon_conn_check_resp *)rwk->msg; + mutex_lock(&rdev_list_lock); + list_for_each_entry(rdev, &rdev_list, list) { + addr = &rdev->addr; + if (addr->sq_node != rwk->sq.sq_node || + addr->sq_port != rwk->sq.sq_port) + continue; + + if (!cc_resp->result.error) + atomic_inc(&rdev->reports); + break; + } + mutex_unlock(&rdev_list_lock); + + kfree(rwk->msg); + kfree(rwk); +} + +/** + * rpmon_qmi_exec_cb_worker - callback worker for execution + * @work: work to been done + * + * Called as worker handler by the single worker thread of rpmon_wq. + * The worker is scheduled after timeout ms duration since the execution. + */ +static void rpmon_qmi_exec_cb_worker(struct work_struct *work) +{ + struct delayed_work *dwk = to_delayed_work(work); + struct exec_cb_work *ewk = + container_of(dwk, struct exec_cb_work, dwk); + struct rpmon_qmi_device *rdev = ewk->rdev; + + mutex_lock(&rdev_list_lock); + if (ewk->checks <= atomic_read(&rdev->reports)) { + pr_debug("%s health check success", rdev->info->name); + goto out; + } + + pr_err("subsystem %s failed to respond in time", rdev->info->name); + + rpmon_event_notify(rdev->info, RPMON_EVENT_CHKCONN_FAIL); + +out: + mutex_unlock(&rdev_list_lock); + kfree(ewk); +} + +static struct rpmon_qmi_cb_fn rpmon_qmi_event_callbacks[] = { + { + .callback = rpmon_qmi_register_req_cb, + .msg_len = sizeof(struct rpmon_register_req), + }, + { + .callback = rpmon_qmi_conn_check_resp_cb, + .msg_len = sizeof(struct rpmon_conn_check_resp), + }, +}; + +/** + * rpmon_qmi_conn_check - send indication, initiate and queue callback work + * @rdev: device interface of specific remote processor to be checked + */ +static int rpmon_qmi_conn_check(struct rpmon_qmi_device *rdev) +{ + struct exec_cb_work *ewk; + + mutex_lock(&rdev_list_lock); + if (!(rdev->flag & RP_REGISTERED)) { + pr_err("%s has not registered", rdev->info->name); + return -ENONET; + } + + if (!__ratelimit(&rdev->ratelimit)) { + pr_err("%s rate-limited", rdev->info->name); + return 0; + } + mutex_unlock(&rdev_list_lock); + + rdev->rqmi->sendmsg(rdev, NULL, 0); + + ewk = kzalloc(sizeof(*ewk), GFP_KERNEL); + if (!ewk) + return -ENOMEM; + + ewk->rdev = rdev; + ewk->checks = atomic_inc_return(&rdev->checks); + INIT_DELAYED_WORK(&ewk->dwk, rpmon_qmi_exec_cb_worker); + queue_delayed_work(rpqmi_wq, + &ewk->dwk, msecs_to_jiffies(rdev->timeout)); + + return 0; +} + +static struct rpmon_qmi_exec_fn rpmon_qmi_exec_calls[] = { + {.exec_call = rpmon_qmi_conn_check}, +}; + +static int rpmon_qmi_monitor(struct rpmon_info *info, u32 event) +{ + struct rpmon_qmi_device *rdev = (struct rpmon_qmi_device *)info->priv; + int i, idx; + + for (i = 0; i < RPMON_EXEC_MAX; i++) { + if (event & RPMON_ACTION(i)) { + if (i < ARRAY_SIZE(rpmon_qmi_exec_calls)) { + idx = array_index_nospec(i, ARRAY_SIZE(rpmon_qmi_exec_calls)); + if (rpmon_qmi_exec_calls[idx].exec_call) + return rpmon_qmi_exec_calls[idx].exec_call(rdev); + else + return -ENOTSUPP; + } else + return -ENOPARAM; + } + } + + return -EINVAL; +} + +static int rpmon_qmi_drv_probe(struct platform_device *pdev) +{ + struct rpmon_info *info = pdev->dev.platform_data; + struct rpmon_qmi_device *rdev; + struct device_node *node = pdev->dev.of_node; + const char *name; + int ret = -ENODEV; + + if (node) { + /* Allocate info for one device */ + info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); + if (!info) { + ret = -ENOMEM; + goto out; + } + + if (!of_property_read_string(node, "linux,subsys", &name)) + info->name = devm_kstrdup(&pdev->dev, name, GFP_KERNEL); + else + info->name = devm_kasprintf(&pdev->dev, GFP_KERNEL, + "%pOFn", node); + info->version = "devicetree"; + } + + if (!info || !info->name || !info->version) { + dev_dbg(&pdev->dev, "%s: err_info\n", __func__); + return ret; + } + + /* Allocate device for qmi specific reference */ + rdev = devm_kzalloc(&pdev->dev, sizeof(*rdev), GFP_KERNEL); + if (!rdev) { + ret = -ENOMEM; + goto err_info_free; + } + + rdev->rqmi = rpqmi; + rdev->info = info; + info->priv = rdev; + info->monitor = rpmon_qmi_monitor; + platform_set_drvdata(pdev, rdev); + + ret = rpmon_register_device(&pdev->dev, info); + if (ret) { + dev_err(&pdev->dev, "unable to register rpmon_qmi_device\n"); + goto err_rdev_free; + } + + mutex_lock(&rdev_list_lock); + list_add_tail(&rdev->list, &rdev_list); + mutex_unlock(&rdev_list_lock); + + return ret; + +err_rdev_free: + devm_kfree(&pdev->dev, rdev); +err_info_free: + devm_kfree(&pdev->dev, info); +out: + return ret; +} + +static int rpmon_qmi_drv_remove(struct platform_device *pdev) +{ + struct rpmon_qmi_device *rdev = platform_get_drvdata(pdev); + + rpmon_unregister_device(rdev->info); + + return 0; +} +static void rpmon_qmi_msg_callback(enum rpmon_qmi_msg_type type, + struct sockaddr_qrtr *sq, + const void *msg) +{ + struct recv_work *rwk; + + if (type >= (sizeof(rpmon_qmi_event_callbacks) / + sizeof(struct rpmon_qmi_cb_fn))) { + pr_err("Error non-supported message type.\n"); + return; + } + + if (rpmon_qmi_event_callbacks[type].callback) { + rwk = kzalloc(sizeof(*rwk), GFP_KERNEL); + if (!rwk) { + pr_err("Error to alloc recv_work"); + return; + } + + INIT_WORK(&rwk->work, rpmon_qmi_event_callbacks[type].callback); + memcpy(&rwk->sq, sq, sizeof(*sq)); + + rwk->msg = kzalloc(rpmon_qmi_event_callbacks[type].msg_len, + GFP_KERNEL); + if (!rwk->msg) { + pr_err("Error to alloc message of recv_work"); + kfree(rwk); + return; + } + + memcpy(rwk->msg, msg, rpmon_qmi_event_callbacks[type].msg_len); + queue_work(rpqmi_wq, &rwk->work); + } +} + +static const struct of_device_id rpmon_of_qmi_match[] = { + { .compatible = "rpmon-qmi" }, + { /* Sentinel */ }, +}; + +static struct platform_driver rpmon_qmi_drv = { + .probe = rpmon_qmi_drv_probe, + .remove = rpmon_qmi_drv_remove, + .driver = { + .name = DRIVER_NAME, + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(rpmon_of_qmi_match), + }, +}; + +static int __init rpmon_qmi_drv_init(void) +{ + int ret; + + rpqmi_wq = create_singlethread_workqueue("rpmon_qmi_wq"); + if (!rpqmi_wq) { + pr_err("Error creating workqueue\n"); + ret = -EFAULT; + goto out; + } + + rpqmi = kzalloc(sizeof(*rpqmi), GFP_KERNEL); + if (!rpqmi) { + ret = -ENOMEM; + goto err_wq_free; + } + + ret = rpmon_qmi_handle_init(rpqmi, rpmon_qmi_msg_callback); + if (ret) + goto err_rpqmi_free; + + ret = qmi_handle_init(&rpqmi->qmi, + RPQMI_BUF_SIZE, NULL, rpqmi->handlers); + if (ret < 0) { + pr_err("Error init qmi handle, %d", ret); + goto err_rpqmi_free; + } + + ret = qmi_add_server(&rpqmi->qmi, + rpqmi->svc->service, + rpqmi->svc->version, + rpqmi->svc->instance); + if (ret < 0) { + pr_err("Error add qmi server, %d", ret); + goto err_rpqmi_free; + } + mutex_init(&rdev_list_lock); + + return platform_driver_register(&rpmon_qmi_drv); + +err_rpqmi_free: + kfree(rpqmi); +err_wq_free: + destroy_workqueue(rpqmi_wq); +out: + return ret; +} +late_initcall_sync(rpmon_qmi_drv_init); + +static void rpmon_qmi_del_server(void) +{ + struct qrtr_ctrl_pkt pkt; + struct sockaddr_qrtr sq; + struct msghdr msg = { }; + struct kvec iv = { &pkt, sizeof(pkt) }; + struct qmi_service *svc = rpqmi->svc; + struct qmi_handle *qmi = &rpqmi->qmi; + int ret; + + memset(&pkt, 0, sizeof(pkt)); + pkt.cmd = cpu_to_le32(QRTR_TYPE_DEL_SERVER); + pkt.server.service = cpu_to_le32(svc->service); + pkt.server.instance = cpu_to_le32(svc->version | svc->instance << 8); + pkt.server.node = cpu_to_le32(qmi->sq.sq_node); + pkt.server.port = cpu_to_le32(qmi->sq.sq_port); + + sq.sq_family = qmi->sq.sq_family; + sq.sq_node = qmi->sq.sq_node; + sq.sq_port = QRTR_PORT_CTRL; + + msg.msg_name = &sq; + msg.msg_namelen = sizeof(sq); + + mutex_lock(&qmi->sock_lock); + if (qmi->sock) { + ret = kernel_sendmsg(qmi->sock, &msg, &iv, 1, sizeof(pkt)); + if (ret < 0) + pr_err("send service delete message failed: %d\n", ret); + } + mutex_unlock(&qmi->sock_lock); +} + +static void __exit rpmon_qmi_drv_exit(void) +{ + rpmon_qmi_del_server(); + + qmi_handle_release(&rpqmi->qmi); + + platform_driver_unregister(&rpmon_qmi_drv); +} +module_exit(rpmon_qmi_drv_exit); + +MODULE_AUTHOR("Wang Wenhu "); +MODULE_DESCRIPTION("Subsystem Monitor via QMI platform driver"); +MODULE_ALIAS("platform:" DRIVER_NAME); +MODULE_LICENSE("GPL v2"); -- 2.17.1