From patchwork Thu Jul 7 07:15:54 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lukasz Luba X-Patchwork-Id: 12909135 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9DE0EC433EF for ; Thu, 7 Jul 2022 07:16:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233760AbiGGHQT (ORCPT ); Thu, 7 Jul 2022 03:16:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38692 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234266AbiGGHQR (ORCPT ); Thu, 7 Jul 2022 03:16:17 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 384F62FFEB; Thu, 7 Jul 2022 00:16:16 -0700 (PDT) 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 546F6D6E; Thu, 7 Jul 2022 00:16:16 -0700 (PDT) Received: from e123648.arm.com (unknown [10.57.11.194]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 1AF3A3F70D; Thu, 7 Jul 2022 00:16:12 -0700 (PDT) From: Lukasz Luba To: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org Cc: daniel.lezcano@linaro.org, amitk@kernel.org, rui.zhang@intel.com, lukasz.luba@arm.com, viresh.kumar@linaro.org, rafael@kernel.org, dietmar.eggemann@arm.com, nm@ti.com, sboyd@kernel.org, sudeep.holla@arm.com, cristian.marussi@arm.com, matthias.bgg@gmail.com, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 3/4] firmware: arm_scmi: Get detailed power scale from perf Date: Thu, 7 Jul 2022 08:15:54 +0100 Message-Id: <20220707071555.10085-4-lukasz.luba@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220707071555.10085-1-lukasz.luba@arm.com> References: <20220707071555.10085-1-lukasz.luba@arm.com> Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org In SCMI v3.1 the power scale can be in micro-Watts. The upper layers, e.g. cpufreq and EM should handle received power values properly (upscale when needed). Thus, provide an interface which allows to check what is the scale for power values. The old interface allowed to distinguish between bogo-Watts and milli-Watts only (which was good for older SCMI spec). Acked-by: Sudeep Holla Signed-off-by: Lukasz Luba --- drivers/firmware/arm_scmi/perf.c | 18 +++++++++++------- include/linux/scmi_protocol.h | 8 +++++++- 2 files changed, 18 insertions(+), 8 deletions(-) diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c index bbb0331801ff..92414e53f908 100644 --- a/drivers/firmware/arm_scmi/perf.c +++ b/drivers/firmware/arm_scmi/perf.c @@ -170,8 +170,7 @@ struct perf_dom_info { struct scmi_perf_info { u32 version; int num_domains; - bool power_scale_mw; - bool power_scale_uw; + enum scmi_power_scale power_scale; u64 stats_addr; u32 stats_size; struct perf_dom_info *dom_info; @@ -201,9 +200,13 @@ static int scmi_perf_attributes_get(const struct scmi_protocol_handle *ph, u16 flags = le16_to_cpu(attr->flags); pi->num_domains = le16_to_cpu(attr->num_domains); - pi->power_scale_mw = POWER_SCALE_IN_MILLIWATT(flags); + + if (POWER_SCALE_IN_MILLIWATT(flags)) + pi->power_scale = SCMI_POWER_MILLIWATTS; if (PROTOCOL_REV_MAJOR(pi->version) >= 0x3) - pi->power_scale_uw = POWER_SCALE_IN_MICROWATT(flags); + if (POWER_SCALE_IN_MICROWATT(flags)) + pi->power_scale = SCMI_POWER_MICROWATTS; + pi->stats_addr = le32_to_cpu(attr->stats_addr_low) | (u64)le32_to_cpu(attr->stats_addr_high) << 32; pi->stats_size = le32_to_cpu(attr->stats_size); @@ -792,11 +795,12 @@ static bool scmi_fast_switch_possible(const struct scmi_protocol_handle *ph, return dom->fc_info && dom->fc_info->level_set_addr; } -static bool scmi_power_scale_mw_get(const struct scmi_protocol_handle *ph) +static enum scmi_power_scale +scmi_power_scale_get(const struct scmi_protocol_handle *ph) { struct scmi_perf_info *pi = ph->get_priv(ph); - return pi->power_scale_mw; + return pi->power_scale; } static const struct scmi_perf_proto_ops perf_proto_ops = { @@ -811,7 +815,7 @@ static const struct scmi_perf_proto_ops perf_proto_ops = { .freq_get = scmi_dvfs_freq_get, .est_power_get = scmi_dvfs_est_power_get, .fast_switch_possible = scmi_fast_switch_possible, - .power_scale_mw_get = scmi_power_scale_mw_get, + .power_scale_get = scmi_power_scale_get, }; 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 704111f63993..a0a246310ba1 100644 --- a/include/linux/scmi_protocol.h +++ b/include/linux/scmi_protocol.h @@ -60,6 +60,12 @@ struct scmi_clock_info { }; }; +enum scmi_power_scale { + SCMI_POWER_BOGOWATTS, + SCMI_POWER_MILLIWATTS, + SCMI_POWER_MICROWATTS +}; + struct scmi_handle; struct scmi_device; struct scmi_protocol_handle; @@ -135,7 +141,7 @@ struct scmi_perf_proto_ops { unsigned long *rate, unsigned long *power); bool (*fast_switch_possible)(const struct scmi_protocol_handle *ph, struct device *dev); - bool (*power_scale_mw_get)(const struct scmi_protocol_handle *ph); + enum scmi_power_scale (*power_scale_get)(const struct scmi_protocol_handle *ph); }; /**