From patchwork Mon Jan 20 12:23:29 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Marussi X-Patchwork-Id: 11342027 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BE84D109A for ; Mon, 20 Jan 2020 12:27:24 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 90494217F4 for ; Mon, 20 Jan 2020 12:27:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="CPYuwhLW" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 90494217F4 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org 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:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: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=BGArBU/VABi4mdba65TRmsppxwlTjNUr0s/xREzouvo=; b=CPYuwhLWcn5orZtDGak1KIxVfP /QC3H1o0lotG/wy68J/GBcX7qeJoOrsrSPsKdVFhbZAxFci/7IZA5HP+49Sa4MpY8kXscgqSteB+R Wtyl1hWT0KR7AW2jBQiGFlE5m/5ieFwIX3yXndVmWNZejq7/KLTfxv24DdrMh2U7/fE5FoVMgTlhL Ft7wL2ydNrNrwXGOtJ8taon5gQpcj3ccbO8j3ClZzbGtjdZxiFpu2Sm3J8OwsWtAWvOtuMjSX1sV2 hxGQRGdK8xGQml8gEWs5RwwJRjPL3Rynux406QHPFG0HETn7wmccd7B1rSwZTbtAbSlzwfdglJzrB PyR0DeAw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1itW9J-0005mE-Dm; Mon, 20 Jan 2020 12:27:21 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1itW6c-0001WT-TY for linux-arm-kernel@lists.infradead.org; Mon, 20 Jan 2020 12:24:40 +0000 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 6280113D5; Mon, 20 Jan 2020 04:24:32 -0800 (PST) Received: from e120937-lin.cambridge.arm.com (e120937-lin.cambridge.arm.com [10.1.197.50]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 7DE643F68E; Mon, 20 Jan 2020 04:24:31 -0800 (PST) From: Cristian Marussi To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [RFC PATCH 07/11] firmware: arm_scmi: Add Power notifications support Date: Mon, 20 Jan 2020 12:23:29 +0000 Message-Id: <20200120122333.46217-8-cristian.marussi@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200120122333.46217-1-cristian.marussi@arm.com> References: <20200120122333.46217-1-cristian.marussi@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200120_042435_065692_3FA0F7DE X-CRM114-Status: GOOD ( 13.91 ) X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [217.140.110.172 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: cristian.marussi@arm.com, james.quinlan@broadcom.com, lukasz.luba@arm.com, sudeep.holla@arm.com MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Make SCMI Power protocol register with the notification core. Signed-off-by: Cristian Marussi --- drivers/firmware/arm_scmi/power.c | 155 +++++++++++++++++++++++++++++- include/linux/scmi_protocol.h | 26 +++++ 2 files changed, 180 insertions(+), 1 deletion(-) diff --git a/drivers/firmware/arm_scmi/power.c b/drivers/firmware/arm_scmi/power.c index cf7f0312381b..024d6a375710 100644 --- a/drivers/firmware/arm_scmi/power.c +++ b/drivers/firmware/arm_scmi/power.c @@ -6,6 +6,7 @@ */ #include "common.h" +#include "notify.h" enum scmi_power_protocol_cmd { POWER_DOMAIN_ATTRIBUTES = 0x3, @@ -48,6 +49,12 @@ struct scmi_power_state_notify { __le32 notify_enable; }; +struct scmi_power_state_notify_payld { + __le32 agent_id; + __le32 domain_id; + __le32 power_state; +}; + struct power_dom_info { bool state_set_sync; bool state_set_async; @@ -61,6 +68,14 @@ struct scmi_power_info { u64 stats_addr; u32 stats_size; struct power_dom_info *dom_info; + const struct scmi_handle *handle; +}; + +static struct scmi_power_info *pinfo; + +static enum scmi_power_protocol_cmd evt_2_cmd[] = { + POWER_STATE_NOTIFY, + POWER_STATE_CHANGE_REQUESTED_NOTIFY, }; static int scmi_power_attributes_get(const struct scmi_handle *handle, @@ -186,11 +201,130 @@ static struct scmi_power_ops power_ops = { .state_get = scmi_power_state_get, }; +static int scmi_power_request_notify(const struct scmi_handle *handle, + u32 domain, int message_id, bool enable) +{ + int ret; + struct scmi_xfer *t; + struct scmi_power_state_notify *notify; + + ret = scmi_xfer_get_init(handle, message_id, SCMI_PROTOCOL_POWER, + sizeof(*notify), 0, &t); + if (ret) + return ret; + + notify = t->tx.buf; + notify->domain = cpu_to_le32(domain); + notify->notify_enable = enable ? cpu_to_le32(BIT(0)) : 0; + + ret = scmi_do_xfer(handle, t); + + scmi_xfer_put(handle, t); + return ret; +} + +static bool scmi_power_set_notify_enabled(u8 evt_id, const u32 *src_id, + bool enable) +{ + int ret, cmd_id; + + cmd_id = MAP_EVT_TO_ENABLE_CMD(evt_id, evt_2_cmd); + if (cmd_id < 0) + return false; + + if (src_id) { + ret = scmi_power_request_notify(pinfo->handle, *src_id, + cmd_id, enable); + if (ret) + pr_warn("Failed enabling SCMI Notifications - Power - evt[%X] dom[%d] - ret:%d\n", + evt_id, *src_id, ret); + } else { + int r, dom; + + ret = 1; + for (dom = 0; dom < pinfo->num_domains; dom++) { + r = scmi_power_request_notify(pinfo->handle, dom, + cmd_id, enable); + if (r) + pr_warn("Failed enabling SCMI Notifications - Power - evt[%X] dom[%d] - ret:%d\n", + evt_id, dom, r); + ret *= r; + } + } + + return !ret ? true : false; +} + +static void *scmi_power_fill_custom_report(u8 evt_id, u64 timestamp, + const void *payld, size_t payld_sz, + void *report, u32 *src_id) +{ + void *rep = NULL; + + switch (evt_id) { + case POWER_STATE_CHANGED: + { + const struct scmi_power_state_notify_payld *p = payld; + struct scmi_power_state_changed_report *r = report; + + if (sizeof(*p) != payld_sz) + break; + + r->timestamp = timestamp; + r->agent_id = le32_to_cpu(p->agent_id); + r->domain_id = le32_to_cpu(p->domain_id); + r->power_state = le32_to_cpu(p->power_state); + *src_id = r->domain_id; + rep = r; + break; + } + case POWER_STATE_CHANGE_REQUESTED: + { + const struct scmi_power_state_notify_payld *p = payld; + struct scmi_power_state_change_requested_report *r = report; + + if (sizeof(*p) != payld_sz) + break; + + r->timestamp = timestamp; + r->agent_id = le32_to_cpu(p->agent_id); + r->domain_id = le32_to_cpu(p->domain_id); + r->power_state = le32_to_cpu(p->power_state); + *src_id = r->domain_id; + rep = r; + break; + } + default: + break; + } + + return rep; +} + +static const struct scmi_event power_events[] = { + { + .evt_id = POWER_STATE_CHANGED, + .max_payld_sz = 12, + .max_report_sz = + sizeof(struct scmi_power_state_changed_report), + }, + { + .evt_id = POWER_STATE_CHANGE_REQUESTED, + .max_payld_sz = 12, + .max_report_sz = + sizeof(struct scmi_power_state_change_requested_report), + }, +}; + +static const struct scmi_protocol_event_ops power_event_ops = { + .set_notify_enabled = scmi_power_set_notify_enabled, + .fill_custom_report = scmi_power_fill_custom_report, +}; + static int scmi_power_protocol_init(struct scmi_handle *handle) { int domain; u32 version; - struct scmi_power_info *pinfo; scmi_version_get(handle, SCMI_PROTOCOL_POWER, &version); @@ -214,7 +348,12 @@ static int scmi_power_protocol_init(struct scmi_handle *handle) scmi_power_domain_attributes_get(handle, domain, dom); } + scmi_register_protocol_events(SCMI_PROTOCOL_POWER, PAGE_SIZE, + &power_event_ops, power_events, + ARRAY_SIZE(power_events)); + pinfo->version = version; + pinfo->handle = handle; handle->power_ops = &power_ops; handle->power_priv = pinfo; @@ -227,3 +366,17 @@ static int __init scmi_power_init(void) &scmi_power_protocol_init); } subsys_initcall(scmi_power_init); + +int scmi_register_power_event_notifier(u8 evt_id, u32 *dom_id, + struct notifier_block *nb) +{ + return scmi_register_event_notifier(SCMI_PROTOCOL_POWER, evt_id, + dom_id, nb); +} + +int scmi_unregister_power_event_notifier(u8 evt_id, u32 *dom_id, + struct notifier_block *nb) +{ + return scmi_unregister_event_notifier(SCMI_PROTOCOL_POWER, evt_id, + dom_id, nb); +} diff --git a/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h index 5c873a59b387..61bdfe0bebe2 100644 --- a/include/linux/scmi_protocol.h +++ b/include/linux/scmi_protocol.h @@ -4,8 +4,13 @@ * * Copyright (C) 2018 ARM Ltd. */ +#ifndef _LINUX_SCMI_PROTOCOL_H +#define _LINUX_SCMI_PROTOCOL_H + #include #include +#include +#include #define SCMI_MAX_STR_SIZE 16 #define SCMI_MAX_NUM_RATES 16 @@ -319,3 +324,24 @@ static inline void scmi_driver_unregister(struct scmi_driver *driver) {} typedef int (*scmi_prot_init_fn_t)(struct scmi_handle *); int scmi_protocol_register(int protocol_id, scmi_prot_init_fn_t fn); void scmi_protocol_unregister(int protocol_id); + +struct scmi_power_state_changed_report { + ktime_t timestamp; + u32 agent_id; + u32 domain_id; + u32 power_state; +}; + +struct scmi_power_state_change_requested_report { + ktime_t timestamp; + u32 agent_id; + u32 domain_id; + u32 power_state; +}; + +int scmi_register_power_event_notifier(u8 evt_id, u32 *dom_id, + struct notifier_block *nb); +int scmi_unregister_power_event_notifier(u8 evt_id, u32 *dom_id, + struct notifier_block *nb); + +#endif /* _LINUX_SCMI_PROTOCOL_H */