From patchwork Wed Jan 6 20:15:43 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Marussi X-Patchwork-Id: 12002165 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=-17.0 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 C28CFC433DB for ; Wed, 6 Jan 2021 20:21:10 +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 88A2C22B40 for ; Wed, 6 Jan 2021 20:21:10 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 88A2C22B40 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=qjpty1YxyBTktt/OSJQDp5sWPb 1e1wnrxxF4XbyZbJT0Xyi0jjNE2XIFUhsEAEGCwG63MQR+oGbX/d29E7qNccRiNCn1Is+vnYSb9ce hXFcvZVfFqhS43emNdxNhUmMhR/kxLG864vDQFt28q/5E5r1d/W2+xQ48X3nH3P5u9nGDlScFTMbe WLtTramgbzbeI6ZK9x61D+kQmbA/gYx6Yk/GckPoEsgPVpTuet2OE3eXNuMvZqPdrHgJbAzyiveJ0 JqpXlIJ+j9m/meElNb4hMiGJYjR21PUNxAEf92RQYUnZMl78kjWgmf21NPF+42L1S/5U+sqeLGKsV y6xsQ0bw==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kxFGt-0004sq-Ce; Wed, 06 Jan 2021 20:19:07 +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 1kxFF5-00045P-Ry for linux-arm-kernel@lists.infradead.org; Wed, 06 Jan 2021 20:17:22 +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 5B5211474; Wed, 6 Jan 2021 12:17:15 -0800 (PST) Received: from e120937-lin.home (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 58BD73F719; Wed, 6 Jan 2021 12:17:13 -0800 (PST) From: Cristian Marussi To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v4 10/37] firmware: arm_scmi: add helper to access revision area memory Date: Wed, 6 Jan 2021 20:15:43 +0000 Message-Id: <20210106201610.26538-11-cristian.marussi@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210106201610.26538-1-cristian.marussi@arm.com> References: <20210106201610.26538-1-cristian.marussi@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210106_151716_068159_DACF6769 X-CRM114-Status: GOOD ( 14.17 ) 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@arm.com, 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.