From patchwork Tue Jan 12 19:19:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Marussi X-Patchwork-Id: 12014623 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 48AB2C433E0 for ; Tue, 12 Jan 2021 19:25:16 +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 E63122070B for ; Tue, 12 Jan 2021 19:25:15 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E63122070B 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=Xyd/mxZYS/hCcU6xMtpypBL4o1lkGkulCZf5HAiKCiA=; b=LuS8EkYXNa2GI/wiw0t9ct45xi 1j+vrFNzoM2wBfJRHOvSNhWC+Xw306omouz/bYfPJo5bASeqN8hOGQ/Fh0w9ZLWQn8hwADvltVQCm G+V40rL6eDZY6kWdwdFegIO8mFdhEeIG4/C6aoQM+hOS8ZlWvqnKiDm+Ytzrr8NrcZlRJx/VLLEHZ EFxcfA1ScUCwma6zfE2ypfqymbHL0I6Nese1+nb8xCf1ujWa0vuOQbKLojSHT4xap/tFn8lj7hi9a BhWYg5xyHmQHV9Yb+k8++RTUkL2I6p575XlQ+LrIrObEQOWfWHmfs89ewAcvwQ1WIk30IJp+VlNxZ Cy+i7Yuw==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kzPGO-0000tK-6S; Tue, 12 Jan 2021 19:23:32 +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 1kzPEG-00005P-1N for linux-arm-kernel@lists.infradead.org; Tue, 12 Jan 2021 19:21:22 +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 6F339143B; Tue, 12 Jan 2021 11:21:18 -0800 (PST) Received: from e120937-lin.home (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 9D0DA3F66E; Tue, 12 Jan 2021 11:21:16 -0800 (PST) From: Cristian Marussi To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v5 09/36] firmware: arm_scmi: add helper to access revision area memory Date: Tue, 12 Jan 2021 19:19:51 +0000 Message-Id: <20210112192018.34994-10-cristian.marussi@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210112192018.34994-1-cristian.marussi@arm.com> References: <20210112192018.34994-1-cristian.marussi@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210112_142120_252401_D0698DA9 X-CRM114-Status: GOOD ( 14.00 ) 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 112cbc8e9b52..ea3d7493b1a4 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.