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=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 3445EC4363A for ; Wed, 14 Oct 2020 15:07:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DDBA722201 for ; Wed, 14 Oct 2020 15:07:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388795AbgJNPHf (ORCPT ); Wed, 14 Oct 2020 11:07:35 -0400 Received: from foss.arm.com ([217.140.110.172]:50954 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731654AbgJNPHL (ORCPT ); Wed, 14 Oct 2020 11:07:11 -0400 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 97A7DD6E; Wed, 14 Oct 2020 08:07:10 -0700 (PDT) Received: from e120937-lin.home (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id A77323F71F; Wed, 14 Oct 2020 08:07:08 -0700 (PDT) From: Cristian Marussi To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: sudeep.holla@arm.com, lukasz.luba@arm.com, james.quinlan@broadcom.com, Jonathan.Cameron@Huawei.com, f.fainelli@gmail.com, etienne.carriere@linaro.org, thara.gopinath@linaro.org, vincent.guittot@linaro.org, souvik.chakravarty@arm.com, cristian.marussi@arm.com Subject: [PATCH 09/11] [DEBUG] firmware: arm_scmi: add example SCMI driver for custom protocol Date: Wed, 14 Oct 2020 16:05:43 +0100 Message-Id: <20201014150545.44807-10-cristian.marussi@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201014150545.44807-1-cristian.marussi@arm.com> References: <20201014150545.44807-1-cristian.marussi@arm.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add an example SCMI driver using custom vendor protocol 0x99 and also registering for Performance protocol notifications. Signed-off-by: Cristian Marussi --- drivers/firmware/Kconfig | 7 + drivers/firmware/arm_scmi/Makefile | 2 + drivers/firmware/arm_scmi/scmi_custom_dummy.c | 126 ++++++++++++++++++ 3 files changed, 135 insertions(+) create mode 100644 drivers/firmware/arm_scmi/scmi_custom_dummy.c diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig index 75e2668a6490..d209df6fd3ee 100644 --- a/drivers/firmware/Kconfig +++ b/drivers/firmware/Kconfig @@ -48,6 +48,13 @@ config ARM_SCMI_POWER_DOMAIN will be called scmi_pm_domain. Note this may needed early in boot before rootfs may be available. +config ARM_SCMI_CUSTOM_DUMMY + tristate "SCMI Custom Dummy driver" + depends on ARM_SCMI_PROTOCOL_CUSTOM || (COMPILE_TEST && OF) + default n + help + Custom Dummy driver + config ARM_SCPI_PROTOCOL tristate "ARM System Control and Power Interface (SCPI) Message Protocol" depends on ARM || ARM64 || COMPILE_TEST diff --git a/drivers/firmware/arm_scmi/Makefile b/drivers/firmware/arm_scmi/Makefile index 0a03b7432497..361ede03cdb5 100644 --- a/drivers/firmware/arm_scmi/Makefile +++ b/drivers/firmware/arm_scmi/Makefile @@ -12,3 +12,5 @@ obj-$(CONFIG_ARM_SCMI_PROTOCOL_CUSTOM) += scmi_custom.o obj-$(CONFIG_ARM_SCMI_PROTOCOL) += scmi-module.o obj-$(CONFIG_ARM_SCMI_POWER_DOMAIN) += scmi_pm_domain.o + +obj-$(CONFIG_ARM_SCMI_CUSTOM_DUMMY) += scmi_custom_dummy.o diff --git a/drivers/firmware/arm_scmi/scmi_custom_dummy.c b/drivers/firmware/arm_scmi/scmi_custom_dummy.c new file mode 100644 index 000000000000..28fd3595a690 --- /dev/null +++ b/drivers/firmware/arm_scmi/scmi_custom_dummy.c @@ -0,0 +1,126 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * + * Copyright (C) 2018-2020 ARM Ltd. + */ + +#include +#include +#include +#include +#include + +static const struct scmi_dummy_ops *dummy_ops; + +static int dummy_custom_perf_cb(struct notifier_block *nb, + unsigned long event, void *data) +{ + struct scmi_perf_level_report *er = data; + + pr_info("%s()::%d - EVENT:[%ld] - TS:%lld DOMAIN_ID:%d AGENT_ID:%d LEVEL:%d\n", + __func__, __LINE__, event, er->timestamp, er->domain_id, + er->agent_id, er->performance_level); + + return NOTIFY_OK; +} + +static struct notifier_block dummy_custom_perf_nb = { + .notifier_call = dummy_custom_perf_cb, + .priority = 10, +}; + +static int custom_dummy_scream_cb(struct notifier_block *nb, + unsigned long event, void *data) +{ + struct scmi_dummy_scream_report *er = data; + + pr_info("%s()::%d - EVENT:[%ld] - TS:%lld DOMAIN_ID:%d AGENT_ID:%d LEVEL:%d\n", + __func__, __LINE__, event, er->timestamp, er->domain_id, + er->agent_id, er->scream); + + return NOTIFY_OK; +} + +static struct notifier_block custom_dummy_nb = { + .notifier_call = custom_dummy_scream_cb, + .priority = 10, +}; + +static int scmi_dummy_probe(struct scmi_device *sdev) +{ + int num_domains; + struct device *dev = &sdev->dev; + const struct scmi_handle *handle = sdev->handle; + u32 src_id; + + if (!handle) + return -ENODEV; + + dummy_ops = handle->get_ops(handle, SCMI_PROTOCOL_CUSTOM_DUMMY); + if (IS_ERR(dummy_ops)) + return PTR_ERR(dummy_ops); + + num_domains = dummy_ops->num_domains_get(handle); + if (num_domains < 0) { + dev_err(dev, "number of domains not found\n"); + return num_domains; + } + + pr_info("Registering notify_callback as CUSTOM_DUMMY !!\n"); + + src_id = 0x02; + handle->notify_ops->register_event_notifier(handle, + SCMI_PROTOCOL_CUSTOM_DUMMY, + SCMI_EVENT_DUMMY_SCREAM, + &src_id, &custom_dummy_nb); + + src_id = 0x01; + handle->notify_ops->register_event_notifier(handle, + SCMI_PROTOCOL_PERF, + SCMI_EVENT_PERFORMANCE_LEVEL_CHANGED, + &src_id, + &dummy_custom_perf_nb); + + return 0; +} + +static void scmi_dummy_remove(struct scmi_device *sdev) +{ + const struct scmi_handle *handle = sdev->handle; + u32 src_id; + + src_id = 0x02; + handle->notify_ops->unregister_event_notifier(handle, + SCMI_PROTOCOL_CUSTOM_DUMMY, + SCMI_EVENT_DUMMY_SCREAM, + &src_id, &custom_dummy_nb); + + src_id = 0x01; + handle->notify_ops->unregister_event_notifier(handle, + SCMI_PROTOCOL_PERF, + SCMI_EVENT_PERFORMANCE_LEVEL_CHANGED, + &src_id, + &dummy_custom_perf_nb); + + handle->put_ops(handle, SCMI_PROTOCOL_CUSTOM_DUMMY); + + return; +} + +static const struct scmi_device_id scmi_id_table[] = { + { SCMI_PROTOCOL_CUSTOM_DUMMY, "custom_dummy" }, + { }, +}; +MODULE_DEVICE_TABLE(scmi, scmi_id_table); + +static struct scmi_driver scmi_custom_dummy_driver = { + .name = "scmi-custom-dummy", + .probe = scmi_dummy_probe, + .remove = scmi_dummy_remove, + .id_table = scmi_id_table, +}; +module_scmi_driver(scmi_custom_dummy_driver); + +MODULE_AUTHOR("DummyMaster"); +MODULE_DESCRIPTION("ARM SCMI Custom Dummy driver"); +MODULE_LICENSE("GPL v2"); -- 2.17.1