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=-8.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable 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 2760CC2D0A3 for ; Thu, 29 Oct 2020 11:46:02 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 956C520780 for ; Thu, 29 Oct 2020 11:46:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="VSrngkUE" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 956C520780 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References:Message-ID: Subject:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=KvdP4UeCtUePC6wmWxUCA+Xt8roEJIn+u5Z9IIa/I2U=; b=VSrngkUEMNZUlmAv30w8lnhv9 upRtrT7/7sLZ2/vpZkz/Tf0XyBwAJrRtxF6JvJ6bWW49vdFLk5xZVQUC27u5hj3R+prZXspr00e6E dF5mWAkxR6l22Spx3/9xE2qdEDJLErZTUk302q8EZaVoGr3bYLa1L0m5JXkh/c4XdjzbF9VFLRaWf Loq6HLDKlefJpvMnS8Mtf0FIqjYd9qZKvmmRg0RJFjOb6CB1iAs/ZZmygL6bP0/7XH9DMFSzVzKtV niNsoKVjCgZzpHPzVbU4Z8N+uF+FZlizdj9eRoXc/lSn6LwxAsKiK26LpgvitdIvQFLiiErbkSqbx J6p5BKnBA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kY6M7-000378-TA; Thu, 29 Oct 2020 11:44:35 +0000 Received: from foss.arm.com ([217.140.110.172]) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kY6M5-00036X-PB for linux-arm-kernel@lists.infradead.org; Thu, 29 Oct 2020 11:44:34 +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 B5E4313A1; Thu, 29 Oct 2020 04:44:30 -0700 (PDT) Received: from e120937-lin (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id E2A873F66E; Thu, 29 Oct 2020 04:44:28 -0700 (PDT) Date: Thu, 29 Oct 2020 11:44:18 +0000 From: Cristian Marussi To: Etienne Carriere Subject: Re: [PATCH v3 1/4] firmware: arm_scmi: Add Voltage Domain Support Message-ID: <20201029114418.GI20482@e120937-lin> References: <20201026203148.47416-1-cristian.marussi@arm.com> <20201026203148.47416-2-cristian.marussi@arm.com> <20201028204416.GF20482@e120937-lin> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.4 (2018-02-28) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201029_074433_961921_DE535231 X-CRM114-Status: GOOD ( 32.74 ) 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: devicetree@vger.kernel.org, satyakim@qti.qualcomm.com, f.fainelli@gmail.com, Vincent Guittot , Rob Herring , Jonathan.Cameron@huawei.com, linux-kernel@vger.kernel.org, broonie@kernel.org, "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" , Jim Quinlan , Sudeep Holla , Souvik Chakravarty , lukasz.luba@arm.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Oct 29, 2020 at 12:21:56PM +0100, Etienne Carriere wrote: > On Wed, 28 Oct 2020 at 21:44, Cristian Marussi wrote: > > > > On Wed, Oct 28, 2020 at 03:29:57PM +0100, Etienne Carriere wrote: > > > Hi Cristian, > > > > > > Some remaining minor comments see below. > > > FYI I've successfully tested this series (the 4 patches). > > > > > > > Hi > > > > Thanks a lot ! > > > > Replies inline down below. > > > > [snip] > > > > +struct scmi_msg_cmd_config_set { > > > > + __le32 domain_id; > > > > + __le32 config; > > > > +}; > > > > + > > > > +struct scmi_msg_cmd_level_set { > > > > + __le32 domain_id; > > > > + __le32 flags; > > > > + __le32 voltage_level; > > > > +}; > > > > + > > > > +struct voltage_info { > > > > + u32 version; > > > > + u16 num_domains; > > > > > > Could be an unsigned int. > > > > > > > I tend to use fixed size types matching the protocols messages sizing on > > the internal while exposing non-fixed size types in scmi_protocol.h like > > in scmi_voltage_info, but these indeed are values exposed directly to > > the user afterwards. Any other reason to prefer non-fixed size here ? > > I think fixed size should be used where really needed. > Since in this structure you're quite abstracted from the protocol, a generic > type is preferred I think. > Ok, I'll fix in V4. Thanks Cristian > Regards, > Etienne > > > > > > > + struct scmi_voltage_info **domains; > > > > +}; > > > > + > > > > +static int scmi_protocol_attributes_get(const struct scmi_handle *handle, > > > > + struct voltage_info *vinfo) > > > > +{ > > > > + int ret; > > > > + struct scmi_xfer *t; > > > > + struct scmi_msg_resp_protocol_attributes *resp; > > > > + > > > > + ret = scmi_xfer_get_init(handle, PROTOCOL_ATTRIBUTES, > > > > + SCMI_PROTOCOL_VOLTAGE, 0, sizeof(*resp), &t); > > > > + if (ret) > > > > + return ret; > > > > + > > > > + resp = t->rx.buf; > > > > + ret = scmi_do_xfer(handle, t); > > > > + if (!ret) > > > > + vinfo->num_domains = > > > > + NUM_VOLTAGE_DOMAINS(le32_to_cpu(resp->attr)); > > > > + > > > > + scmi_xfer_put(handle, t); > > > > + return ret; > > > > +} > > > > + > > > > +static inline int scmi_init_voltage_levels(struct device *dev, > > > > > > Should remove this inline attribute. > > > > > > > Ah right, I removed one and left this. I'll do. > > > > > > + struct scmi_voltage_info *v, > > > > + u32 flags, u32 num_returned, > > > > + u32 num_remaining) > > > > [snip] > > > > > > +DEFINE_SCMI_PROTOCOL_REGISTER_UNREGISTER(SCMI_PROTOCOL_VOLTAGE, voltage) > > > > diff --git a/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h > > > > index 9cd312a1ff92..181fdebc2793 100644 > > > > --- a/include/linux/scmi_protocol.h > > > > +++ b/include/linux/scmi_protocol.h > > > > @@ -209,6 +209,64 @@ struct scmi_reset_ops { > > > > int (*deassert)(const struct scmi_handle *handle, u32 domain); > > > > }; > > > > > > > > +/** > > > > + * struct scmi_voltage_info - describe one available SCMI Voltage Domain > > > > + * > > > > + * @id: the domain ID as advertised by the platform > > > > + * @segmented: defines the layout of the entries of array @levels_uv. > > > > + * - when True the entries are to be interpreted as triplets, > > > > + * each defining a segment representing a range of equally > > > > + * space voltages: , , > > > > + * - when False the entries simply represent a single discrete > > > > + * supported voltage level > > > > + * @negative_volts_allowed: True if any of the entries of @levels_uv represent > > > > + * a negative voltage. > > > > + * @attributes: represents Voltage Domain advertised attributes > > > > + * @name: name assigned to the Voltage Domain by platform > > > > + * @num_levels: number of total entries in @levels_uv. > > > > + * @levels_uv: array of entries describing the available voltage levels for > > > > + * this domain. > > > > + */ > > > > +struct scmi_voltage_info { > > > > + unsigned int id; > > > > + bool segmented; > > > > +#define SCMI_VOLTAGE_SEGMENT_LOW 0 > > > > +#define SCMI_VOLTAGE_SEGMENT_HIGH 1 > > > > +#define SCMI_VOLTAGE_SEGMENT_STEP 2 > > > > > > Maybe move these macros before 'int *level_us;' as these are indices > > > in that array. > > > > > > > Right, I'll do. > > > > Thanks > > > > Cristian > > > > > > + bool negative_volts_allowed; > > > > + unsigned int attributes; > > > > + char name[SCMI_MAX_STR_SIZE]; > > > > + unsigned int num_levels; > > > > + int *levels_uv; > > > > +}; > > > > + > > > > +/** > > > > + * struct scmi_voltage_ops - represents the various operations provided > > > > + * by SCMI Voltage Protocol > > > > + * > > > > + * @num_domains_get: get the count of voltage domains provided by SCMI > > > > + * @info_get: get the information of the specified domain > > > > + * @config_set: set the config for the specified domain > > > > + * @config_get: get the config of the specified domain > > > > + * @level_set: set the voltage level for the specified domain > > > > + * @level_get: get the voltage level of the specified domain > > > > + */ > > > > +struct scmi_voltage_ops { > > > > + int (*num_domains_get)(const struct scmi_handle *handle); > > > > + const struct scmi_voltage_info __must_check *(*info_get) > > > > + (const struct scmi_handle *handle, u32 domain_id); > > > > + int (*config_set)(const struct scmi_handle *handle, u32 domain_id, > > > > + u32 config); > > > > +#define SCMI_VOLTAGE_ARCH_STATE_OFF 0x0 > > > > +#define SCMI_VOLTAGE_ARCH_STATE_ON 0x7 > > > > + int (*config_get)(const struct scmi_handle *handle, u32 domain_id, > > > > + u32 *config); > > > > + int (*level_set)(const struct scmi_handle *handle, u32 domain_id, > > > > + u32 flags, s32 volt_uV); > > > > + int (*level_get)(const struct scmi_handle *handle, u32 domain_id, > > > > + s32 *volt_uV); > > > > +}; > > > > + > > > > /** > > > > * struct scmi_notify_ops - represents notifications' operations provided by > > > > * SCMI core > > > > @@ -262,6 +320,7 @@ struct scmi_notify_ops { > > > > * @clk_ops: pointer to set of clock protocol operations > > > > * @sensor_ops: pointer to set of sensor protocol operations > > > > * @reset_ops: pointer to set of reset protocol operations > > > > + * @voltage_ops: pointer to set of voltage protocol operations > > > > * @notify_ops: pointer to set of notifications related operations > > > > * @perf_priv: pointer to private data structure specific to performance > > > > * protocol(for internal use only) > > > > @@ -273,6 +332,8 @@ struct scmi_notify_ops { > > > > * protocol(for internal use only) > > > > * @reset_priv: pointer to private data structure specific to reset > > > > * protocol(for internal use only) > > > > + * @voltage_priv: pointer to private data structure specific to voltage > > > > + * protocol(for internal use only) > > > > * @notify_priv: pointer to private data structure specific to notifications > > > > * (for internal use only) > > > > */ > > > > @@ -284,6 +345,7 @@ struct scmi_handle { > > > > const struct scmi_power_ops *power_ops; > > > > const struct scmi_sensor_ops *sensor_ops; > > > > const struct scmi_reset_ops *reset_ops; > > > > + const struct scmi_voltage_ops *voltage_ops; > > > > const struct scmi_notify_ops *notify_ops; > > > > /* for protocol internal use */ > > > > void *perf_priv; > > > > @@ -291,6 +353,7 @@ struct scmi_handle { > > > > void *power_priv; > > > > void *sensor_priv; > > > > void *reset_priv; > > > > + void *voltage_priv; > > > > void *notify_priv; > > > > void *system_priv; > > > > }; > > > > @@ -303,6 +366,7 @@ enum scmi_std_protocol { > > > > SCMI_PROTOCOL_CLOCK = 0x14, > > > > SCMI_PROTOCOL_SENSOR = 0x15, > > > > SCMI_PROTOCOL_RESET = 0x16, > > > > + SCMI_PROTOCOL_VOLTAGE = 0x17, > > > > }; > > > > > > > > enum scmi_system_events { > > > > -- > > > > 2.17.1 > > > > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel