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 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 470FCCD98E2 for ; Wed, 17 Jun 2026 09:59:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=CjrcmaDlzJPrhdYlzrBeWuWbdP3POx8JvX+i0sZJ4z0=; b=O4N7KxQtpVHgCjZxpSYh3TUJat A/O0RdGUzYzgd0glhnTGkXh3m5HdIbeBU/2PK+n8rqHW7klK9qjbpzq33x9BzDtoj/S5Dfnz/Jj4I k+FL7R7ccp/dcYmTkZTifu8hRZXGgALvqraI388hLia/2pFKirF1+vWly4w3Ofw/fJA+zXRyHt65N tYljNektH4sTDxqhHlZ4Qcp/hz85VpJIO6fLm6LxY04yXh21svi45JB7o9/KLFPLo5sHuy1J3c/v7 SGJCtCUVq+g3fQaS82veyc9EinpxIdrstmY/QQLVxTF2MzYfALcfx3LdMiwycPTTAQ2UKXtZNV7VC g6t4tODw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wZn3b-0000000Gzby-3rnM; Wed, 17 Jun 2026 09:59:39 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wZn3V-0000000GzY6-0DU8 for linux-arm-kernel@lists.infradead.org; Wed, 17 Jun 2026 09:59:34 +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 51F392E8E; Wed, 17 Jun 2026 02:59:27 -0700 (PDT) Received: from donnerap.manchester.arm.com (donnerap.manchester.arm.com [10.33.8.81]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 7D5DE3F915; Wed, 17 Jun 2026 02:59:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1781690372; bh=kb+faEBQwpa+6x5yiLQOyunnwPeV1UaGWYCXwUJdJ0k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Kc7lGPtRhEDKZSRTGxhg2k9a6y7tUwgejqrCwwnF8y1Rkk7Uow2Ns+INiI4du/GlE vU6p0y14ErcD8Yv8UQ5wvv69FObdNNK5pNktU0b7Ul9TxEo/4pq7iZcL+fZai2l0XM F37HvGbD8CkesJ98yfTG06IjJYJyg2NdQSe42I8k= From: Philip Radford To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, arm-scmi@vger.kernel.org, linux-pm@vger.kernel.org Cc: sudeep.holla@arm.com, james.quinlan@broadcom.com, f.fainelli@gmail.com, vincent.guittot@linaro.org, etienne.carriere@st.com, peng.fan@oss.nxp.com, michal.simek@amd.com, quic_sibis@quicinc.com, dan.carpenter@linaro.org, d-gole@ti.com, souvik.chakravarty@arm.com, Cristian Marussi , Philip Radford Subject: [PATCH v7 02/13] firmware: arm_scmi: Add an optional custom parameter to fastchannel helpers Date: Wed, 17 Jun 2026 10:58:59 +0100 Message-ID: <20260617095910.1963578-3-philip.radford@arm.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260617095910.1963578-1-philip.radford@arm.com> References: <20260617095910.1963578-1-philip.radford@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260617_025933_187891_7D72A00D X-CRM114-Status: GOOD ( 12.91 ) 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 From: Cristian Marussi Starting from SCMIv4.0 the protocols DESCRIBE_FASTCHANNEL commands allow to specify one additional per-protocol custom field in the outgoing message request in order to, optionally, further narrow down the scope of the fastchannel discovery request; the related message-reply format is instead unchanged. Add an optional custom protocol parameter to the common fastchannel helper so as to enable the caller to choose the kind of message to send based on the detected protocol version. Signed-off-by: Cristian Marussi Signed-off-by: Philip Radford --- drivers/firmware/arm_scmi/driver.c | 12 ++++++++++-- drivers/firmware/arm_scmi/perf.c | 8 ++++---- drivers/firmware/arm_scmi/powercap.c | 8 ++++---- drivers/firmware/arm_scmi/protocols.h | 2 +- 4 files changed, 19 insertions(+), 11 deletions(-) diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c index f247e19cff87..53ae4cfa10b1 100644 --- a/drivers/firmware/arm_scmi/driver.c +++ b/drivers/firmware/arm_scmi/driver.c @@ -1872,6 +1872,11 @@ static int scmi_iterator_run(void *iter) struct scmi_msg_get_fc_info { __le32 domain; __le32 message_id; + __le32 custom; +#define MSG_FC_INFO_SZ_EXTENDED \ + (sizeof(struct scmi_msg_get_fc_info)) +#define MSG_FC_INFO_SZ \ + (sizeof(struct scmi_msg_get_fc_info) - sizeof(__le32)) }; struct scmi_msg_resp_desc_fc { @@ -1900,7 +1905,7 @@ struct scmi_msg_resp_desc_fc { static void scmi_common_fastchannel_init(const struct scmi_protocol_handle *ph, u8 describe_id, u32 message_id, u32 valid_size, - u32 domain, void __iomem **p_addr, + u32 domain, u32 *custom, void __iomem **p_addr, struct scmi_fc_db_info **p_db, u32 *rate_limit) { int ret; @@ -1931,13 +1936,16 @@ scmi_common_fastchannel_init(const struct scmi_protocol_handle *ph, } ret = ph->xops->xfer_get_init(ph, describe_id, - sizeof(*info), sizeof(*resp), &t); + custom ? MSG_FC_INFO_SZ_EXTENDED : + MSG_FC_INFO_SZ, sizeof(*resp), &t); if (ret) goto err_out; info = t->tx.buf; info->domain = cpu_to_le32(domain); info->message_id = cpu_to_le32(message_id); + if (custom) + info->custom = cpu_to_le32(*custom); /* * Bail out on error leaving fc_info addresses zeroed; this includes diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c index 4583d02bee1c..7f283f457e02 100644 --- a/drivers/firmware/arm_scmi/perf.c +++ b/drivers/firmware/arm_scmi/perf.c @@ -835,25 +835,25 @@ static void scmi_perf_domain_init_fc(const struct scmi_protocol_handle *ph, return; ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL, - PERF_LEVEL_GET, 4, dom->id, + PERF_LEVEL_GET, 4, dom->id, NULL, &fc[PERF_FC_LEVEL].get_addr, NULL, &fc[PERF_FC_LEVEL].rate_limit); ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL, - PERF_LIMITS_GET, 8, dom->id, + PERF_LIMITS_GET, 8, dom->id, NULL, &fc[PERF_FC_LIMIT].get_addr, NULL, &fc[PERF_FC_LIMIT].rate_limit); if (dom->info.set_perf) ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL, - PERF_LEVEL_SET, 4, dom->id, + PERF_LEVEL_SET, 4, dom->id, NULL, &fc[PERF_FC_LEVEL].set_addr, &fc[PERF_FC_LEVEL].set_db, &fc[PERF_FC_LEVEL].rate_limit); if (dom->set_limits) ph->hops->fastchannel_init(ph, PERF_DESCRIBE_FASTCHANNEL, - PERF_LIMITS_SET, 8, dom->id, + PERF_LIMITS_SET, 8, dom->id, NULL, &fc[PERF_FC_LIMIT].set_addr, &fc[PERF_FC_LIMIT].set_db, &fc[PERF_FC_LIMIT].rate_limit); diff --git a/drivers/firmware/arm_scmi/powercap.c b/drivers/firmware/arm_scmi/powercap.c index ab9733f4458b..22aff71c75e9 100644 --- a/drivers/firmware/arm_scmi/powercap.c +++ b/drivers/firmware/arm_scmi/powercap.c @@ -716,24 +716,24 @@ static void scmi_powercap_domain_init_fc(const struct scmi_protocol_handle *ph, return; ph->hops->fastchannel_init(ph, POWERCAP_DESCRIBE_FASTCHANNEL, - POWERCAP_CAP_SET, 4, domain, + POWERCAP_CAP_SET, 4, domain, NULL, &fc[POWERCAP_FC_CAP].set_addr, &fc[POWERCAP_FC_CAP].set_db, &fc[POWERCAP_FC_CAP].rate_limit); ph->hops->fastchannel_init(ph, POWERCAP_DESCRIBE_FASTCHANNEL, - POWERCAP_CAP_GET, 4, domain, + POWERCAP_CAP_GET, 4, domain, NULL, &fc[POWERCAP_FC_CAP].get_addr, NULL, &fc[POWERCAP_FC_CAP].rate_limit); ph->hops->fastchannel_init(ph, POWERCAP_DESCRIBE_FASTCHANNEL, - POWERCAP_PAI_SET, 4, domain, + POWERCAP_PAI_SET, 4, domain, NULL, &fc[POWERCAP_FC_PAI].set_addr, &fc[POWERCAP_FC_PAI].set_db, &fc[POWERCAP_FC_PAI].rate_limit); ph->hops->fastchannel_init(ph, POWERCAP_DESCRIBE_FASTCHANNEL, - POWERCAP_PAI_GET, 4, domain, + POWERCAP_PAI_GET, 4, domain, NULL, &fc[POWERCAP_FC_PAI].get_addr, NULL, &fc[POWERCAP_FC_PAI].rate_limit); diff --git a/drivers/firmware/arm_scmi/protocols.h b/drivers/firmware/arm_scmi/protocols.h index f51245aca259..e618d3141c95 100644 --- a/drivers/firmware/arm_scmi/protocols.h +++ b/drivers/firmware/arm_scmi/protocols.h @@ -280,7 +280,7 @@ struct scmi_proto_helpers_ops { 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, + u32 valid_size, u32 domain, u32 *custom, void __iomem **p_addr, struct scmi_fc_db_info **p_db, u32 *rate_limit); -- 2.47.3