From nobody Thu Apr 2 12:14:38 2026 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 9AD55381B04; Sun, 29 Mar 2026 16:34:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774802095; cv=none; b=FgPuTNnNNhB7dMbnU1IR+nEXrVkAw9O2wj5IlTiIZOrkKNGOWBDWGGEtZjFUxhoOlhhE3/eidD1621t1MyBgaZ+XxjrhPhTKaCXHTmTv3xZ7XsTWZ4P4jJ+eYn4SYzvgs5oHsiX6QBmpsBn4OdzczGf65QH/4FCtqGreApmepjI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774802095; c=relaxed/simple; bh=2AXFZJAe7/vLYkhP+0K7ubk1Q8YcProSflrM6zXzIIc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=uXnpO3mwv6nM4nwlKas0RbfWOSqzyZllQpcoWdIlOtPW0l2e0jFBX/m9tLu8vwar5kJU6zmeMKQ5Xa0vqeuZk2eZuURK7jgiSuc3BnltKurItgUDmkIXCylBXhXzEc70veJmemmUNXt/CmV9u1du8QXwQ6Li6PybOktVB/leTOM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=cpf0wzZf; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="cpf0wzZf" 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 2A31E3627; Sun, 29 Mar 2026 09:34:47 -0700 (PDT) Received: from pluto.fritz.box (usa-sjc-mx-foss1.foss.arm.com [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 1EDA63F915; Sun, 29 Mar 2026 09:34:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1774802093; bh=2AXFZJAe7/vLYkhP+0K7ubk1Q8YcProSflrM6zXzIIc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cpf0wzZfNZb7qBly/L0YuUrrJgHLmP0cneROm9p/1oRbsI0us57t3pB6h8GKL7ZVi 6RIsoBviP6UfqKq0J1nxNiKgu9dPzxXAVjL8K9lnQaR+vGu/kA43mRYucly+csNrQ2 kPzqpmds9R3HRXcw9NB0INFMt8oQK6szZa+jHbFU= From: Cristian Marussi To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, arm-scmi@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-doc@vger.kernel.org Cc: sudeep.holla@kernel.org, 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, dan.carpenter@linaro.org, d-gole@ti.com, jonathan.cameron@huawei.com, elif.topuz@arm.com, lukasz.luba@arm.com, philip.radford@arm.com, brauner@kernel.org, souvik.chakravarty@arm.com, Cristian Marussi Subject: [PATCH v3 12/24] firmware: arm_scmi: Add support for Telemetry reset Date: Sun, 29 Mar 2026 17:33:23 +0100 Message-ID: <20260329163337.637393-13-cristian.marussi@arm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260329163337.637393-1-cristian.marussi@arm.com> References: <20260329163337.637393-1-cristian.marussi@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add support for Telemetry operations needed to request platform to reset telemetry current configuration and data events values. Signed-off-by: Cristian Marussi --- v2 --> v3 - split from monolithic Telemetry patch - use scmi_telemetry_de_unlink --- drivers/firmware/arm_scmi/telemetry.c | 44 +++++++++++++++++++++++++++ include/linux/scmi_protocol.h | 2 ++ 2 files changed, 46 insertions(+) diff --git a/drivers/firmware/arm_scmi/telemetry.c b/drivers/firmware/arm_s= cmi/telemetry.c index 61eaad817db4..ff0a5a8f6f57 100644 --- a/drivers/firmware/arm_scmi/telemetry.c +++ b/drivers/firmware/arm_scmi/telemetry.c @@ -2456,6 +2456,49 @@ static int scmi_telemetry_des_sample_get(const struc= t scmi_protocol_handle *ph, return ret; } =20 +static void scmi_telemetry_local_resources_reset(struct telemetry_info *ti) +{ + struct scmi_telemetry_res_info *rinfo; + + /* Get rinfo as it is...without triggering an enumeration */ + rinfo =3D __scmi_telemetry_resources_get(ti); + /* Clear all local state...*/ + for (int i =3D 0; i < rinfo->num_des; i++) { + rinfo->des[i]->enabled =3D false; + rinfo->des[i]->tstamp_enabled =3D false; + + scmi_telemetry_de_unlink(rinfo->des[i]); + } + for (int i =3D 0; i < rinfo->num_groups; i++) { + rinfo->grps[i].enabled =3D false; + rinfo->grps[i].tstamp_enabled =3D false; + rinfo->grps[i].current_mode =3D SCMI_TLM_ONDEMAND; + rinfo->grps[i].active_update_interval =3D 0; + } +} + +static int scmi_telemetry_reset(const struct scmi_protocol_handle *ph) +{ + struct scmi_xfer *t; + int ret; + + ret =3D ph->xops->xfer_get_init(ph, TELEMETRY_RESET, sizeof(u32), 0, &t); + if (ret) + return ret; + + put_unaligned_le32(0, t->tx.buf); + ret =3D ph->xops->do_xfer(ph, t); + if (!ret) { + struct telemetry_info *ti =3D ph->get_priv(ph); + + scmi_telemetry_local_resources_reset(ti); + } + + ph->xops->xfer_put(ph, t); + + return ret; +} + static const struct scmi_telemetry_proto_ops tlm_proto_ops =3D { .info_get =3D scmi_telemetry_info_get, .de_lookup =3D scmi_telemetry_de_lookup, @@ -2467,6 +2510,7 @@ static const struct scmi_telemetry_proto_ops tlm_prot= o_ops =3D { .de_data_read =3D scmi_telemetry_de_data_read, .des_bulk_read =3D scmi_telemetry_des_bulk_read, .des_sample_get =3D scmi_telemetry_des_sample_get, + .reset =3D scmi_telemetry_reset, }; =20 /** diff --git a/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h index 5f05df297064..fc3b5493dc1a 100644 --- a/include/linux/scmi_protocol.h +++ b/include/linux/scmi_protocol.h @@ -963,6 +963,7 @@ struct scmi_telemetry_de_sample { * the ones belonging to a specific group when provided. * This causes an immediate update platform-side of all the * enabled DEs. + * @reset: reset configuration and telemetry data. */ struct scmi_telemetry_proto_ops { const struct scmi_telemetry_info __must_check *(*info_get) @@ -989,6 +990,7 @@ struct scmi_telemetry_proto_ops { int __must_check (*des_sample_get)(const struct scmi_protocol_handle *ph, int grp_id, int *num_samples, struct scmi_telemetry_de_sample *samples); + int (*reset)(const struct scmi_protocol_handle *ph); }; =20 /** --=20 2.53.0