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Mon, 8 Jan 2024 14:01:42 GMT Received: from blr-ubuntu-253.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Mon, 8 Jan 2024 06:01:38 -0800 From: Sibi Sankar To: , , , CC: , , , , , Sibi Sankar Subject: [PATCH 1/3] firmware: arm_scmi: Add perf_notify_support interface Date: Mon, 8 Jan 2024 19:31:16 +0530 Message-ID: <20240108140118.1596-2-quic_sibis@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240108140118.1596-1-quic_sibis@quicinc.com> References: <20240108140118.1596-1-quic_sibis@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: v4zCZrKco8xHRw5bT_OK5dyjStkSyflJ X-Proofpoint-ORIG-GUID: v4zCZrKco8xHRw5bT_OK5dyjStkSyflJ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-12-09_01,2023-12-07_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 bulkscore=0 malwarescore=0 clxscore=1011 lowpriorityscore=0 phishscore=0 mlxlogscore=999 adultscore=0 impostorscore=0 mlxscore=0 spamscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2311290000 definitions=main-2401080120 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240108_060150_176904_1D58AB20 X-CRM114-Status: GOOD ( 15.61 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add a new perf_notify_support interface to the existing perf_ops to export info regarding limit/level change notification support. Signed-off-by: Sibi Sankar --- drivers/firmware/arm_scmi/perf.c | 16 ++++++++++++++++ include/linux/scmi_protocol.h | 8 ++++++++ 2 files changed, 24 insertions(+) diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c index 8ea2a7b3d35d..c167bb5e3607 100644 --- a/drivers/firmware/arm_scmi/perf.c +++ b/drivers/firmware/arm_scmi/perf.c @@ -949,6 +949,21 @@ scmi_power_scale_get(const struct scmi_protocol_handle *ph) return pi->power_scale; } +static int scmi_notify_support(const struct scmi_protocol_handle *ph, u32 domain, + struct scmi_perf_notify_info *info) +{ + struct perf_dom_info *dom; + + dom = scmi_perf_domain_lookup(ph, domain); + if (IS_ERR(dom)) + return -EINVAL; + + info->perf_limit_notify = dom->perf_limit_notify; + info->perf_level_notify = dom->perf_level_notify; + + return 0; +} + static const struct scmi_perf_proto_ops perf_proto_ops = { .num_domains_get = scmi_perf_num_domains_get, .info_get = scmi_perf_info_get, @@ -963,6 +978,7 @@ static const struct scmi_perf_proto_ops perf_proto_ops = { .est_power_get = scmi_dvfs_est_power_get, .fast_switch_possible = scmi_fast_switch_possible, .power_scale_get = scmi_power_scale_get, + .perf_notify_support = scmi_notify_support, }; static int scmi_perf_set_notify_enabled(const struct scmi_protocol_handle *ph, diff --git a/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h index f2f05fb42d28..b0947d004826 100644 --- a/include/linux/scmi_protocol.h +++ b/include/linux/scmi_protocol.h @@ -117,6 +117,11 @@ struct scmi_perf_domain_info { bool set_perf; }; +struct scmi_perf_notify_info { + bool perf_limit_notify; + bool perf_level_notify; +}; + /** * struct scmi_perf_proto_ops - represents the various operations provided * by SCMI Performance Protocol @@ -139,6 +144,7 @@ struct scmi_perf_domain_info { * for a given device * @power_scale_mw_get: indicates if the power values provided are in milliWatts * or in some other (abstract) scale + * @perf_notify_support: indicates if limit and level change notification is supported */ struct scmi_perf_proto_ops { int (*num_domains_get)(const struct scmi_protocol_handle *ph); @@ -165,6 +171,8 @@ struct scmi_perf_proto_ops { bool (*fast_switch_possible)(const struct scmi_protocol_handle *ph, u32 domain); enum scmi_power_scale (*power_scale_get)(const struct scmi_protocol_handle *ph); + int (*perf_notify_support)(const struct scmi_protocol_handle *ph, u32 domain, + struct scmi_perf_notify_info *info); }; /** From patchwork Mon Jan 8 14:01:17 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sibi Sankar X-Patchwork-Id: 13513533 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 039C5C47079 for ; Mon, 8 Jan 2024 14:02:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; 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Mon, 8 Jan 2024 14:01:45 GMT Received: from blr-ubuntu-253.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Mon, 8 Jan 2024 06:01:42 -0800 From: Sibi Sankar To: , , , CC: , , , , , Sibi Sankar Subject: [PATCH 2/3] firmware: arm_scmi: Add perf_opp_xlate interface Date: Mon, 8 Jan 2024 19:31:17 +0530 Message-ID: <20240108140118.1596-3-quic_sibis@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240108140118.1596-1-quic_sibis@quicinc.com> References: <20240108140118.1596-1-quic_sibis@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: R5D3casVtRTZy-PqIhmC_qx1iFnJMUVd X-Proofpoint-ORIG-GUID: R5D3casVtRTZy-PqIhmC_qx1iFnJMUVd X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-12-09_02,2023-12-07_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 malwarescore=0 suspectscore=0 mlxlogscore=999 impostorscore=0 adultscore=0 lowpriorityscore=0 bulkscore=0 spamscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2311290000 definitions=main-2401080120 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240108_060225_801245_D5D3A7C1 X-CRM114-Status: GOOD ( 16.99 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add a new perf_opp_xlate interface to the existing perf_ops to translate a given perf index to frequency. This can be used by the cpufreq driver and framework to determine the throttled frequency from a given perf index and apply HW pressure accordingly. Signed-off-by: Sibi Sankar --- drivers/firmware/arm_scmi/perf.c | 21 +++++++++++++++++++++ include/linux/scmi_protocol.h | 3 +++ 2 files changed, 24 insertions(+) diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c index c167bb5e3607..f26390924e1c 100644 --- a/drivers/firmware/arm_scmi/perf.c +++ b/drivers/firmware/arm_scmi/perf.c @@ -964,6 +964,26 @@ static int scmi_notify_support(const struct scmi_protocol_handle *ph, u32 domain return 0; } +static int scmi_perf_opp_xlate(const struct scmi_protocol_handle *ph, u32 domain, + int idx, unsigned long *freq) +{ + struct perf_dom_info *dom; + + dom = scmi_perf_domain_lookup(ph, domain); + if (IS_ERR(dom)) + return PTR_ERR(dom); + + if (idx >= dom->opp_count) + return -ERANGE; + + if (!dom->level_indexing_mode) + *freq = dom->opp[idx].perf * dom->mult_factor; + else + *freq = dom->opp[idx].indicative_freq * dom->mult_factor; + + return 0; +} + static const struct scmi_perf_proto_ops perf_proto_ops = { .num_domains_get = scmi_perf_num_domains_get, .info_get = scmi_perf_info_get, @@ -979,6 +999,7 @@ static const struct scmi_perf_proto_ops perf_proto_ops = { .fast_switch_possible = scmi_fast_switch_possible, .power_scale_get = scmi_power_scale_get, .perf_notify_support = scmi_notify_support, + .perf_opp_xlate = scmi_perf_opp_xlate, }; static int scmi_perf_set_notify_enabled(const struct scmi_protocol_handle *ph, diff --git a/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h index b0947d004826..9c285ae89848 100644 --- a/include/linux/scmi_protocol.h +++ b/include/linux/scmi_protocol.h @@ -145,6 +145,7 @@ struct scmi_perf_notify_info { * @power_scale_mw_get: indicates if the power values provided are in milliWatts * or in some other (abstract) scale * @perf_notify_support: indicates if limit and level change notification is supported + * @perf_opp_xlate: translates the given perf index to frequency in Hz */ struct scmi_perf_proto_ops { int (*num_domains_get)(const struct scmi_protocol_handle *ph); @@ -173,6 +174,8 @@ struct scmi_perf_proto_ops { enum scmi_power_scale (*power_scale_get)(const struct scmi_protocol_handle *ph); int (*perf_notify_support)(const struct scmi_protocol_handle *ph, u32 domain, struct scmi_perf_notify_info *info); + int (*perf_opp_xlate)(const struct scmi_protocol_handle *ph, u32 domain, + int idx, unsigned long *freq); 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Mon, 8 Jan 2024 14:01:49 GMT Received: from blr-ubuntu-253.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Mon, 8 Jan 2024 06:01:45 -0800 From: Sibi Sankar To: , , , CC: , , , , , Sibi Sankar Subject: [PATCH 3/3] cpufreq: scmi: Register for limit change notifications Date: Mon, 8 Jan 2024 19:31:18 +0530 Message-ID: <20240108140118.1596-4-quic_sibis@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240108140118.1596-1-quic_sibis@quicinc.com> References: <20240108140118.1596-1-quic_sibis@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: 2wcr9TqM6Gggil7z6caXdyBhWfUUhCA4 X-Proofpoint-ORIG-GUID: 2wcr9TqM6Gggil7z6caXdyBhWfUUhCA4 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-12-09_02,2023-12-07_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 malwarescore=0 mlxlogscore=999 bulkscore=0 impostorscore=0 phishscore=0 suspectscore=0 adultscore=0 spamscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2311290000 definitions=main-2401080120 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240108_060157_641460_CE77BAD5 X-CRM114-Status: GOOD ( 16.57 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Register for limit change notifications if supported with the help of perf_notify_support interface and determine the throttled frequency using the perf_opp_xlate to apply HW pressure. Signed-off-by: Sibi Sankar --- drivers/cpufreq/scmi-cpufreq.c | 42 +++++++++++++++++++++++++++++++++- 1 file changed, 41 insertions(+), 1 deletion(-) diff --git a/drivers/cpufreq/scmi-cpufreq.c b/drivers/cpufreq/scmi-cpufreq.c index 4ee23f4ebf4a..53bc8868455d 100644 --- a/drivers/cpufreq/scmi-cpufreq.c +++ b/drivers/cpufreq/scmi-cpufreq.c @@ -25,9 +25,13 @@ struct scmi_data { int domain_id; int nr_opp; struct device *cpu_dev; + struct cpufreq_policy *policy; cpumask_var_t opp_shared_cpus; + struct notifier_block limit_notify_nb; }; +const struct scmi_handle *handle; +static struct scmi_device *scmi_dev; static struct scmi_protocol_handle *ph; static const struct scmi_perf_proto_ops *perf_ops; @@ -144,6 +148,22 @@ scmi_get_cpu_power(struct device *cpu_dev, unsigned long *power, return 0; } +static int scmi_limit_notify_cb(struct notifier_block *nb, unsigned long event, void *data) +{ + unsigned long freq_hz; + struct scmi_perf_limits_report *limit_notify = data; + struct scmi_data *priv = container_of(nb, struct scmi_data, limit_notify_nb); + struct cpufreq_policy *policy = priv->policy; + + if (perf_ops->perf_opp_xlate(ph, priv->domain_id, limit_notify->range_max, &freq_hz)) + return NOTIFY_OK; + + /* Update HW pressure (the boost frequencies are accepted) */ + arch_update_hw_pressure(policy->related_cpus, (freq_hz / HZ_PER_KHZ)); + + return NOTIFY_OK; +} + static int scmi_cpufreq_init(struct cpufreq_policy *policy) { int ret, nr_opp, domain; @@ -151,6 +171,7 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy) struct device *cpu_dev; struct scmi_data *priv; struct cpufreq_frequency_table *freq_table; + struct scmi_perf_notify_info info = {}; cpu_dev = get_cpu_device(policy->cpu); if (!cpu_dev) { @@ -250,6 +271,25 @@ static int scmi_cpufreq_init(struct cpufreq_policy *policy) policy->fast_switch_possible = perf_ops->fast_switch_possible(ph, domain); + ret = perf_ops->perf_notify_support(ph, domain, &info); + if (ret) + dev_warn(cpu_dev, "failed to get supported notifications: %d\n", ret); + + if (info.perf_limit_notify) { + priv->limit_notify_nb.notifier_call = scmi_limit_notify_cb; + ret = handle->notify_ops->devm_event_notifier_register(scmi_dev, SCMI_PROTOCOL_PERF, + SCMI_EVENT_PERFORMANCE_LIMITS_CHANGED, + &domain, + &priv->limit_notify_nb); + if (ret) { + dev_err(cpu_dev, "Error in registering limit change notifier for domain %d\n", + domain); + return ret; + } + } + + priv->policy = policy; + return 0; out_free_opp: @@ -321,8 +361,8 @@ static int scmi_cpufreq_probe(struct scmi_device *sdev) { int ret; struct device *dev = &sdev->dev; - const struct scmi_handle *handle; + scmi_dev = sdev; handle = sdev->handle; if (!handle)