From patchwork Tue Sep 26 06:57:41 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: AKASHI Takahiro X-Patchwork-Id: 1839453 X-Patchwork-Delegate: trini@ti.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=linaro.org header.i=@linaro.org header.a=rsa-sha256 header.s=google header.b=VVGpMFRn; dkim-atps=neutral Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de (client-ip=2a01:238:438b:c500:173d:9f52:ddab:ee01; helo=phobos.denx.de; envelope-from=u-boot-bounces@lists.denx.de; receiver=patchwork.ozlabs.org) Received: from phobos.denx.de (phobos.denx.de [IPv6:2a01:238:438b:c500:173d:9f52:ddab:ee01]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (secp384r1)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4RvrFr6RNbz1yp8 for ; Tue, 26 Sep 2023 16:59:28 +1000 (AEST) Received: from h2850616.stratoserver.net (localhost [IPv6:::1]) by phobos.denx.de (Postfix) with ESMTP id 0E84686D3B; Tue, 26 Sep 2023 08:58:31 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de Authentication-Results: phobos.denx.de; dkim=pass (2048-bit key; unprotected) header.d=linaro.org header.i=@linaro.org header.b="VVGpMFRn"; dkim-atps=neutral Received: by phobos.denx.de (Postfix, from userid 109) id 5241C86D38; Tue, 26 Sep 2023 08:58:29 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on phobos.denx.de X-Spam-Level: X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.2 Received: from mail-ot1-x332.google.com (mail-ot1-x332.google.com [IPv6:2607:f8b0:4864:20::332]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits)) (No client certificate requested) by phobos.denx.de (Postfix) with ESMTPS id 16DE786CBC for ; Tue, 26 Sep 2023 08:58:27 +0200 (CEST) Authentication-Results: phobos.denx.de; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=takahiro.akashi@linaro.org Received: by mail-ot1-x332.google.com with SMTP id 46e09a7af769-6c2107685cbso927190a34.0 for ; Mon, 25 Sep 2023 23:58:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1695711505; x=1696316305; darn=lists.denx.de; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=cLRWsm6IYFzlIfmeMDJ8a5yW5HlQGLkW5IyvUDi5CKg=; b=VVGpMFRnTeA+9RCSyaIn06zG5z9ROJPIqXMsc2sJwccKdMZO4bavzMYERvXKjIL60Q fWV4Jog00DtHd+D0McVFjh91xMylMFX/x+W/51M41eKbueeCcTy18C+5rV949o0dVOPB moDfc6+arcobEN79uJjV8znRHFsqtdPdkMCqO3p2KJlr1rczTsBauq1LH9Ve2V8PuhAc PPk+a+TxuYSFOyGc9IPVLPN3j000ehMOUD4YkRO/F8V/fakC6avSzh9eUL0kKncdCxMq 25XbY4K42HvgOUDV0IPcmpztXEf2bdRj1LYG5SMOBFWD1VROz2d49uOVleZCArZJ4V4K 9YUQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1695711505; x=1696316305; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=cLRWsm6IYFzlIfmeMDJ8a5yW5HlQGLkW5IyvUDi5CKg=; b=jmjQjJgCrfVIeE4HBIBIq9iG/URluBFbxro0Lbrtzm7kS+tDkgO1XPOnjyJl+VoYHg m3+FtaopHjE8GYw6EBg5zFRj1sFZiARt3fjHo5jqd7oQnNnFCMuz5aw77uAtDcQnVBKs OUwaPHKNaeCw2O4moVRZ1hUcUUrlplOIW5r/TThwSw1AoefiV8YUGfET22PH3ULA4I0u 9IW1Y8DZochYH4dZZachs+c7ik8nHeGjcZJYt1RhMN2NKwXgDGilfs66+H/vEzAoO3dh eGNwZjjk8aLPGTl71ELnWX5CWTlepqohKXOYCBsYQlV9wgArf0Fk3eU17HeEz3fppt+5 jE/A== X-Gm-Message-State: AOJu0YxXBaGIjXWEF6mL4MnQeArctkEggDyHSgIjqmrUCwgCbxsoNGwd IL/lgpUcHVCx9iTy0c1rdLak3Q== X-Google-Smtp-Source: AGHT+IHxXtVHuyQ6atHSqnDKlk7kvPopAZtEYGgNVylyb6JagpRSFb+JsfCtk1OPDVUvEvesf/lOLg== X-Received: by 2002:a9d:4c03:0:b0:6bf:500f:b570 with SMTP id l3-20020a9d4c03000000b006bf500fb570mr8284624otf.3.1695711505640; Mon, 25 Sep 2023 23:58:25 -0700 (PDT) Received: from octopus.. ([2400:4050:c3e1:100:6585:aea6:5002:a825]) by smtp.gmail.com with ESMTPSA id s2-20020a639242000000b0057825bd3448sm8758874pgn.51.2023.09.25.23.58.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 25 Sep 2023 23:58:25 -0700 (PDT) From: AKASHI Takahiro To: trini@konsulko.com, sjg@chromium.org Cc: etienne.carriere@st.com, u-boot@lists.denx.de, AKASHI Takahiro , Etienne Carriere Subject: [PATCH v5 07/16] firmware: scmi: framework for installing additional protocols Date: Tue, 26 Sep 2023 15:57:41 +0900 Message-Id: <20230926065750.734440-8-takahiro.akashi@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230926065750.734440-1-takahiro.akashi@linaro.org> References: <20230926065750.734440-1-takahiro.akashi@linaro.org> MIME-Version: 1.0 X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.39 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.103.8 at phobos.denx.de X-Virus-Status: Clean This framework allows SCMI protocols to be installed and bound to the agent so that the agent can manage and utilize them later. Signed-off-by: AKASHI Takahiro Reviewed-by: Simon Glass Reviewed-by: Etienne Carriere --- V4 * remove 'agent' variable as it should be added in the following commit v3 * move "per_device_plat_auto" from a earlier patch * fix comments in "scmi_agent_priv" * modify an order of include files in scmi_agent.h v2 * check for availability of protocols --- drivers/firmware/scmi/scmi_agent-uclass.c | 100 +++++++++++++++++++++- include/scmi_agent-uclass.h | 15 +++- include/scmi_agent.h | 14 +++ 3 files changed, 125 insertions(+), 4 deletions(-) diff --git a/drivers/firmware/scmi/scmi_agent-uclass.c b/drivers/firmware/scmi/scmi_agent-uclass.c index 1fa1e9eef966..482cdaf0c6db 100644 --- a/drivers/firmware/scmi/scmi_agent-uclass.c +++ b/drivers/firmware/scmi/scmi_agent-uclass.c @@ -38,6 +38,86 @@ static const struct error_code scmi_linux_errmap[] = { { .scmi = SCMI_PROTOCOL_ERROR, .errno = -EPROTO, }, }; +/* + * NOTE: The only one instance should exist according to + * the current specification and device tree bindings. + */ +struct udevice *scmi_agent; + +struct udevice *scmi_get_protocol(struct udevice *dev, + enum scmi_std_protocol id) +{ + struct scmi_agent_priv *priv; + struct udevice *proto; + + priv = dev_get_uclass_plat(dev); + if (!priv) { + dev_err(dev, "No priv data found\n"); + return NULL; + } + + switch (id) { + case SCMI_PROTOCOL_ID_CLOCK: + proto = priv->clock_dev; + break; + case SCMI_PROTOCOL_ID_RESET_DOMAIN: + proto = priv->resetdom_dev; + break; + case SCMI_PROTOCOL_ID_VOLTAGE_DOMAIN: + proto = priv->voltagedom_dev; + break; + default: + dev_err(dev, "Protocol not supported\n"); + proto = NULL; + break; + } + if (proto && device_probe(proto)) + dev_err(dev, "Probe failed\n"); + + return proto; +} + +/** + * scmi_add_protocol - add protocol to agent + * @dev: SCMI agent device + * @proto_id: SCMI protocol ID + * @proto: SCMI protocol device + * + * Associate the protocol instance, @proto, to the agent, @dev, + * for later use. + * + * Return: 0 on success, error code on failure + */ +static int scmi_add_protocol(struct udevice *dev, + enum scmi_std_protocol proto_id, + struct udevice *proto) +{ + struct scmi_agent_priv *priv; + + priv = dev_get_uclass_plat(dev); + if (!priv) { + dev_err(dev, "No priv data found\n"); + return -ENODEV; + } + + switch (proto_id) { + case SCMI_PROTOCOL_ID_CLOCK: + priv->clock_dev = proto; + break; + case SCMI_PROTOCOL_ID_RESET_DOMAIN: + priv->resetdom_dev = proto; + break; + case SCMI_PROTOCOL_ID_VOLTAGE_DOMAIN: + priv->voltagedom_dev = proto; + break; + default: + dev_err(dev, "Protocol not supported\n"); + return -EPROTO; + } + + return 0; +} + int scmi_to_linux_errno(s32 scmi_code) { int n; @@ -168,9 +248,10 @@ static int scmi_bind_protocols(struct udevice *dev) int ret = 0; ofnode node; const char *name; + struct driver *drv; + struct udevice *proto; dev_for_each_subnode(node, dev) { - struct driver *drv = NULL; u32 protocol_id; if (!ofnode_is_enabled(node)) @@ -179,6 +260,7 @@ static int scmi_bind_protocols(struct udevice *dev) if (ofnode_read_u32(node, "reg", &protocol_id)) continue; + drv = NULL; name = ofnode_get_name(node); switch (protocol_id) { case SCMI_PROTOCOL_ID_CLOCK: @@ -209,11 +291,22 @@ static int scmi_bind_protocols(struct udevice *dev) continue; } - ret = device_bind(dev, drv, name, NULL, node, NULL); - if (ret) + ret = device_bind(dev, drv, name, NULL, node, &proto); + if (ret) { + dev_err(dev, "failed to bind %s protocol\n", drv->name); break; + } + ret = scmi_add_protocol(dev, protocol_id, proto); + if (ret) { + dev_err(dev, "failed to add protocol: %s, ret: %d\n", + proto->name, ret); + break; + } } + if (!ret) + scmi_agent = dev; + return ret; } @@ -221,5 +314,6 @@ UCLASS_DRIVER(scmi_agent) = { .id = UCLASS_SCMI_AGENT, .name = "scmi_agent", .post_bind = scmi_bind_protocols, + .per_device_plat_auto = sizeof(struct scmi_agent_priv), .per_child_auto = sizeof(struct scmi_agent_proto_priv), }; diff --git a/include/scmi_agent-uclass.h b/include/scmi_agent-uclass.h index eee46c880a56..258aa0f37596 100644 --- a/include/scmi_agent-uclass.h +++ b/include/scmi_agent-uclass.h @@ -5,10 +5,23 @@ #ifndef _SCMI_AGENT_UCLASS_H #define _SCMI_AGENT_UCLASS_H -struct udevice; +#include + struct scmi_msg; struct scmi_channel; +/** + * struct scmi_agent_priv - private data maintained by agent instance + * @clock_dev: SCMI clock protocol device + * @resetdom_dev: SCMI reset domain protocol device + * @voltagedom_dev: SCMI voltage domain protocol device + */ +struct scmi_agent_priv { + struct udevice *clock_dev; + struct udevice *resetdom_dev; + struct udevice *voltagedom_dev; +}; + /** * struct scmi_transport_ops - The functions that a SCMI transport layer must implement. */ diff --git a/include/scmi_agent.h b/include/scmi_agent.h index 577892029ff8..755986d6c424 100644 --- a/include/scmi_agent.h +++ b/include/scmi_agent.h @@ -10,6 +10,7 @@ #ifndef SCMI_AGENT_H #define SCMI_AGENT_H +#include #include struct udevice; @@ -74,6 +75,19 @@ int devm_scmi_of_get_channel(struct udevice *dev); */ int devm_scmi_process_msg(struct udevice *dev, struct scmi_msg *msg); +/** + * scmi_get_protocol() - get protocol instance + * + * @dev: SCMI agent device + * @id: SCMI protocol ID + * + * Obtain the device instance for given protocol ID, @id. + * + * Return: Pointer to the device if found, null otherwise + */ +struct udevice *scmi_get_protocol(struct udevice *dev, + enum scmi_std_protocol id); + /** * scmi_to_linux_errno() - Convert an SCMI error code into a Linux errno code *