From patchwork Wed Feb 14 18:30:00 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cristian Marussi X-Patchwork-Id: 13556937 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E8001C48BC1 for ; Wed, 14 Feb 2024 18:30:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=uNKZcXdsbenR6zg4UIugTraecEsWAX5wYSaHVUoBmPk=; b=e9Oc0OdfN6zUNy c4Sgd9PgN1GYv9lUm8cTRcVZiNk8txWRiqguQdBz0XqxF5fcZ+R1ZfiWEZ75mNipWvX1/xSabbzT2 pWKc8EXfsg1s064U+AEzgy/WtvZFtYs7cDlIV9YGwmNRuxrLSflmuDX4+tjgV++OnSeTKRHClPK3t dvhUEzGza11Y6ldbbqLcuGyY+9rwGxk4s/hzDH4uEQ7V8jA6J8Vk5bSW71Hok34VvI7mFx0UZxBwq vuOwzOkq5PtwzhR5fRS6K66r4jNd844tKvPTsIYLk8+khfsr/FysmO6X6Azr7+s1LtUDBkf95E//P jNzSYznZivr6hYDgoD/A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1raK1k-0000000DwSX-1Qjf; Wed, 14 Feb 2024 18:30:36 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1raK1h-0000000DwRk-3J2x for linux-arm-kernel@lists.infradead.org; Wed, 14 Feb 2024 18:30:34 +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 9AB90DA7; Wed, 14 Feb 2024 10:31:13 -0800 (PST) Received: from pluto.fritz.box (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id E92FE3F7B4; Wed, 14 Feb 2024 10:30:30 -0800 (PST) From: Cristian Marussi To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: sudeep.holla@arm.com, james.quinlan@broadcom.com, f.fainelli@gmail.com, vincent.guittot@linaro.org, peng.fan@oss.nxp.com, michal.simek@amd.com, quic_sibis@quicinc.com, quic_nkela@quicinc.com, souvik.chakravarty@arm.com, Cristian Marussi Subject: [PATCH 1/7] firmware: arm_scmi: Add a common helper to check if a message is supported Date: Wed, 14 Feb 2024 18:30:00 +0000 Message-ID: <20240214183006.3403207-2-cristian.marussi@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240214183006.3403207-1-cristian.marussi@arm.com> References: <20240214183006.3403207-1-cristian.marussi@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240214_103033_930002_EA20ECEE X-CRM114-Status: GOOD ( 13.05 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org A common helper is provided to check if a specific protocol message is supported or not. Signed-off-by: Cristian Marussi --- drivers/firmware/arm_scmi/driver.c | 34 +++++++++++++++++++++++++++ drivers/firmware/arm_scmi/protocols.h | 4 ++++ 2 files changed, 38 insertions(+) diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c index 3ea64b22cf0d..4a64ad5c21ee 100644 --- a/drivers/firmware/arm_scmi/driver.c +++ b/drivers/firmware/arm_scmi/driver.c @@ -1754,10 +1754,44 @@ static void scmi_common_fastchannel_db_ring(struct scmi_fc_db_info *db) #endif } +/** + * scmi_protocol_msg_check - Check protocol message attributes + * + * @ph: A reference to the protocol handle. + * @message_id: The ID of the message to check. + * @attributes: A parameter to optionally return the retrieved message + * attributes, in case of Success. + * + * An helper to check protocol message attributes for a specific protocol + * and message pair. + * + * Return: 0 on SUCCESS + */ +static int scmi_protocol_msg_check(const struct scmi_protocol_handle *ph, + u32 message_id, u32 *attributes) +{ + int ret; + struct scmi_xfer *t; + + ret = xfer_get_init(ph, PROTOCOL_MESSAGE_ATTRIBUTES, + sizeof(__le32), 0, &t); + if (ret) + return ret; + + put_unaligned_le32(message_id, t->tx.buf); + ret = do_xfer(ph, t); + if (!ret && attributes) + *attributes = get_unaligned_le32(t->rx.buf); + xfer_put(ph, t); + + return ret; +} + static const struct scmi_proto_helpers_ops helpers_ops = { .extended_name_get = scmi_common_extended_name_get, .iter_response_init = scmi_iterator_init, .iter_response_run = scmi_iterator_run, + .protocol_msg_check = scmi_protocol_msg_check, .fastchannel_init = scmi_common_fastchannel_init, .fastchannel_db_ring = scmi_common_fastchannel_db_ring, }; diff --git a/drivers/firmware/arm_scmi/protocols.h b/drivers/firmware/arm_scmi/protocols.h index e683c26f24eb..26a3edd49fea 100644 --- a/drivers/firmware/arm_scmi/protocols.h +++ b/drivers/firmware/arm_scmi/protocols.h @@ -251,6 +251,8 @@ struct scmi_fc_info { * provided in @ops. * @iter_response_run: A common helper to trigger the run of a previously * initialized iterator. + * @protocol_msg_check: A common helper to check is a specific protocol message + * is supported. * @fastchannel_init: A common helper used to initialize FC descriptors by * gathering FC descriptions from the SCMI platform server. * @fastchannel_db_ring: A common helper to ring a FC doorbell. @@ -264,6 +266,8 @@ struct scmi_proto_helpers_ops { unsigned int max_resources, u8 msg_id, size_t tx_size, void *priv); int (*iter_response_run)(void *iter); + int (*protocol_msg_check)(const struct scmi_protocol_handle *ph, + u32 message_id, u32 *attributes); void (*fastchannel_init)(const struct scmi_protocol_handle *ph, u8 describe_id, u32 message_id, u32 valid_size, u32 domain,