From patchwork Wed Dec 2 20:39:42 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Marussi X-Patchwork-Id: 11947105 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=-18.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,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 C52E8C64E7B for ; Wed, 2 Dec 2020 20:46:35 +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 05DC3205F4 for ; Wed, 2 Dec 2020 20:46:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 05DC3205F4 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: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=0JfKVNu+ZKbM09Zf00cRNGU6+/2FnEAQjnSiTC0kwuE=; b=oH6gOArzV82gT3NpiwWSlkmgdF HMxDxKt+NagO6lFJI3RDy2ihwRpUduJYjuHw+Qlt7eNk1himfmzVgx8/qL6WzOCAmMzORJ/Ks6X5Y hkogBzkiQUEZuuFftIqCj30mWvsx5mW1Q/gvOi2kNbVUK1zF9XoJDApzZqPhQ6YKzC7lKyvZKi9AW afzMiKARFTdh0G5fLt9b5UPwbWwJApbRLc7lLEUUI5NRp15VwB7echnRsu3uBQuQI96O8Smu7HIUA kJ8humrMPwBL4Bby/Ph0d4R1wcxA5EH/LZp3M81sOgUaM8yb7MvnUPd3/NWG2YovSUbHZbXkJRd9E UY4a7jjQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kkYzB-0003kw-Oq; Wed, 02 Dec 2020 20:44:26 +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 1kkYvd-0002Ns-Jh for linux-arm-kernel@lists.infradead.org; Wed, 02 Dec 2020 20:40:51 +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 1951B14BF; Wed, 2 Dec 2020 12:40:45 -0800 (PST) Received: from e120937-lin.home (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 0E25F3F575; Wed, 2 Dec 2020 12:40:42 -0800 (PST) From: Cristian Marussi To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v3 10/37] firmware: arm_scmi: add helper to access revision area memory Date: Wed, 2 Dec 2020 20:39:42 +0000 Message-Id: <20201202204009.32073-11-cristian.marussi@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201202204009.32073-1-cristian.marussi@arm.com> References: <20201202204009.32073-1-cristian.marussi@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201202_154045_774532_A0B700D2 X-CRM114-Status: GOOD ( 14.56 ) 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: f.fainelli@gmail.com, vincent.guittot@linaro.org, sudeep.holla@arm.com, thara.gopinath@linaro.org, Cristian Marussi , james.quinlan@broadcom.com, Jonathan.Cameron@Huawei.com, souvik.chakravarty@arm.com, etienne.carriere@linaro.org, lukasz.luba@arm.com MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add an helper to grab, from a protocol handle, the handle common memory area allocated to store SCMI version data which is exposed on sysfs. Such helper will be needed by SCMI Base protocol initialization once it will be moved to new protocol handles scheme. Signed-off-by: Cristian Marussi --- drivers/firmware/arm_scmi/common.h | 2 ++ drivers/firmware/arm_scmi/driver.c | 19 +++++++++++++++++++ 2 files changed, 21 insertions(+) diff --git a/drivers/firmware/arm_scmi/common.h b/drivers/firmware/arm_scmi/common.h index 10ac5a6daf10..428bfba40dfd 100644 --- a/drivers/firmware/arm_scmi/common.h +++ b/drivers/firmware/arm_scmi/common.h @@ -215,6 +215,8 @@ struct scmi_xfer_ops { struct scmi_xfer *xfer); }; +struct scmi_revision_info * +scmi_get_revision_area(const struct scmi_protocol_handle *ph); int scmi_handle_put(const struct scmi_handle *handle); struct scmi_handle *scmi_handle_get(struct device *dev); void scmi_set_handle(struct scmi_device *scmi_dev); diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c index d1357640bf07..b936cf47cd7d 100644 --- a/drivers/firmware/arm_scmi/driver.c +++ b/drivers/firmware/arm_scmi/driver.c @@ -698,6 +698,25 @@ static const struct scmi_xfer_ops xfer_ops = { .xfer_put = xfer_put, }; +/** + * scmi_get_revision_area - Retrieve version memory area. + * + * @ph: A reference to the protocol handle. + * + * A helper to grab the version memory area reference during SCMI Base protocol + * initialization. + * + * Return: A reference to the version memory area associated to the SCMI + * instance underlying this protocol handle. + */ +struct scmi_revision_info * +scmi_get_revision_area(const struct scmi_protocol_handle *ph) +{ + const struct scmi_protocol_instance *pi = ph_to_pi(ph); + + return pi->handle->version; +} + /** * scmi_get_protocol_instance - Protocol initialization helper. * @handle: A reference to the SCMI platform instance.