From patchwork Fri Aug 31 14:01:48 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Georgi Djakov X-Patchwork-Id: 10583843 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8C9C514E1 for ; Fri, 31 Aug 2018 14:13:20 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7460F27E01 for ; Fri, 31 Aug 2018 14:13:20 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 66BF828569; Fri, 31 Aug 2018 14:13:20 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id DFABA27E01 for ; Fri, 31 Aug 2018 14:13:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.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=8SmvGW8B1/FUPt8YrmvVi7Bq4ouwJXNZfZGeoN2bkFU=; b=oUOLMfSSs4M0f5qN0UbUh2CbeP Do4WK1Kuuei99fcuGxhR5pkkTBvP5gAWIOE+3bTSsMWDbAjtqw5j8/Y5hRKMKf4rTD0UG+vb1yrPE DcVkckmdLsll6sm+jMYfQjhwEAaoqnjO20kAaSUkYtxPXpTzwloDYeqEl0tSmwoF5S3GfyypZV12W IYyBZm0NoTbUuwbMmIbBGLfgyDvn4v8qPB28OnBuqRMlFW9OzIPhifWXig4wab38GNm+dbPmEeL3c xttMJXniBang640XBCzWGMXNxmCRXDcGMwrq/kJuUH6Lg4V/OVacAF3swXjsvnvln3bUA3M57DOgm SC/aHiGg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1fvkAl-0005LY-KF; Fri, 31 Aug 2018 14:13:15 +0000 Received: from mail-wr1-x442.google.com ([2a00:1450:4864:20::442]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1fvk06-0006fI-Qs for linux-arm-kernel@lists.infradead.org; Fri, 31 Aug 2018 14:02:21 +0000 Received: by mail-wr1-x442.google.com with SMTP id n2-v6so11330490wrw.7 for ; Fri, 31 Aug 2018 07:02:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=j1YcuxG9rYHAsbs3iLSfV/3gBH5qWeeY6yGsufYQHUY=; b=Dt9Brbi5I5sdMsfu8+0SKCz2VnhOlZFHylNdZCS4BNpdZ00ttGxIKxHL+vdIN5Q7HU brAvQlQKoBUxjJPKXhyztt922ZlgD2X0Jj//CHpiumV6yiwwe8vwG/akynmtEi99YBhz qKh9JZhi+Bjy5HShCgI5y+V6gfYBm0DuwmMtc= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=j1YcuxG9rYHAsbs3iLSfV/3gBH5qWeeY6yGsufYQHUY=; b=Mu4KuPfCKNclFiWB4U2UdKFw/Q4nn0BJHQrvd8W0Tn8/iVreWrAQuPxAhFpxz8gMEG XNOqTXUchH0fMPIu9T8+dDfiMKsNmkqChtl8TN7YA+utzFz2s25CopXgHwHRj7MS5qYZ TijhZkjOGwqv58CpXFYWn380rn107GeGlhlF4aN+mF5yDH+GOebf11DH41+J3sbVjg61 uZYPP/zNCWL4/paYS5Iuz/7mXMZjURbClElxOXvb7llO3TbUqLYv0UTFM66K3x2Dq3tO Uh1Cbiqm+gIgJY01HPw+mdLU6cwXtM5xn5gmmeW/wSG8HD82ySjAcFpk50i8W8eo1Ogw igiw== X-Gm-Message-State: APzg51DyeU64ocISq9ihr1CKuG/Fgt6/fmtppnT4v+1P+BxcnR1BbQUL nDR6nKDqZBqnOv0xlOUDhm259g== X-Google-Smtp-Source: ANB0VdZg987v8lageIp6CW8zebXDC+lcpIhLtnl9JlZ0u9B8wDsSgvK6HTLVoa9MZZX6acgukuQfYA== X-Received: by 2002:adf:f648:: with SMTP id x8-v6mr11283757wrp.144.1535724124066; Fri, 31 Aug 2018 07:02:04 -0700 (PDT) Received: from localhost.localdomain ([212.45.67.2]) by smtp.googlemail.com with ESMTPSA id m68-v6sm8624513wmb.10.2018.08.31.07.02.01 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 31 Aug 2018 07:02:02 -0700 (PDT) From: Georgi Djakov To: linux-pm@vger.kernel.org, gregkh@linuxfoundation.org Subject: [PATCH v9 5/8] interconnect: qcom: Add RPM communication Date: Fri, 31 Aug 2018 17:01:48 +0300 Message-Id: <20180831140151.13972-6-georgi.djakov@linaro.org> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20180831140151.13972-1-georgi.djakov@linaro.org> References: <20180831140151.13972-1-georgi.djakov@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180831_070215_018298_7586D774 X-CRM114-Status: GOOD ( 16.81 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, lorenzo.pieralisi@arm.com, skannan@codeaurora.org, arnd@arndb.de, seansw@qti.qualcomm.com, khilman@baylibre.com, mturquette@baylibre.com, rjw@rjwysocki.net, linux-kernel@vger.kernel.org, amit.kucheria@linaro.org, bjorn.andersson@linaro.org, maxime.ripard@bootlin.com, robh+dt@kernel.org, daidavid1@codeaurora.org, evgreen@chromium.org, linux-arm-msm@vger.kernel.org, vincent.guittot@linaro.org, georgi.djakov@linaro.org, linux-arm-kernel@lists.infradead.org, abailon@baylibre.com MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP On some Qualcomm SoCs, there is a remote processor, which controls some of the Network-On-Chip interconnect resources. Other CPUs express their needs by communicating with this processor. Add a driver to handle communication with this remote processor. Signed-off-by: Georgi Djakov Reviewed-by: Evan Green --- .../bindings/interconnect/qcom-smd.txt | 32 +++++++ drivers/interconnect/qcom/Kconfig | 13 +++ drivers/interconnect/qcom/Makefile | 5 + drivers/interconnect/qcom/smd-rpm.c | 91 +++++++++++++++++++ drivers/interconnect/qcom/smd-rpm.h | 15 +++ 5 files changed, 156 insertions(+) create mode 100644 Documentation/devicetree/bindings/interconnect/qcom-smd.txt create mode 100644 drivers/interconnect/qcom/Kconfig create mode 100644 drivers/interconnect/qcom/Makefile create mode 100644 drivers/interconnect/qcom/smd-rpm.c create mode 100644 drivers/interconnect/qcom/smd-rpm.h diff --git a/Documentation/devicetree/bindings/interconnect/qcom-smd.txt b/Documentation/devicetree/bindings/interconnect/qcom-smd.txt new file mode 100644 index 000000000000..2325167f6eaf --- /dev/null +++ b/Documentation/devicetree/bindings/interconnect/qcom-smd.txt @@ -0,0 +1,32 @@ +Qualcomm SMD-RPM interconnect driver binding +------------------------------------------------ +The RPM (Resource Power Manager) is a dedicated hardware engine +for managing the shared SoC resources in order to keep the lowest +power profile. It communicates with other hardware subsystems via +the shared memory driver (SMD) back-end and accepts requests for +various resources. + +Required properties : +- compatible : shall contain only one of the following: + "qcom,interconnect-smd-rpm" + +Example: + smd { + compatible = "qcom,smd"; + + rpm { + interrupts = ; + qcom,ipc = <&apcs 8 0>; + qcom,smd-edge = <15>; + + rpm_requests { + compatible = "qcom,rpm-msm8916"; + qcom,smd-channels = "rpm_requests"; + + interconnect-smd-rpm { + compatible = "qcom,interconnect-smd-rpm"; + }; + + }; + }; + }; diff --git a/drivers/interconnect/qcom/Kconfig b/drivers/interconnect/qcom/Kconfig new file mode 100644 index 000000000000..6146552fac86 --- /dev/null +++ b/drivers/interconnect/qcom/Kconfig @@ -0,0 +1,13 @@ +config INTERCONNECT_QCOM + bool "Qualcomm Network-on-Chip interconnect drivers" + depends on ARCH_QCOM + help + Support for Qualcomm's Network-on-Chip interconnect hardware. + +config INTERCONNECT_QCOM_SMD_RPM + tristate "Qualcomm SMD RPM interconnect driver" + depends on INTERCONNECT_QCOM + depends on QCOM_SMD_RPM + help + This is a driver for communicating interconnect related configuration + details with a remote processor (RPM) on Qualcomm platforms. diff --git a/drivers/interconnect/qcom/Makefile b/drivers/interconnect/qcom/Makefile new file mode 100644 index 000000000000..f4477ad22ba2 --- /dev/null +++ b/drivers/interconnect/qcom/Makefile @@ -0,0 +1,5 @@ +# SPDX-License-Identifier: GPL-2.0 + +qnoc-smd-rpm-objs := smd-rpm.o + +obj-$(CONFIG_INTERCONNECT_QCOM_SMD_RPM) += qnoc-smd-rpm.o diff --git a/drivers/interconnect/qcom/smd-rpm.c b/drivers/interconnect/qcom/smd-rpm.c new file mode 100644 index 000000000000..48b7a2a6eb84 --- /dev/null +++ b/drivers/interconnect/qcom/smd-rpm.c @@ -0,0 +1,91 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * RPM over SMD communication wrapper for interconnects + * + * Copyright (C) 2018 Linaro Ltd + * Author: Georgi Djakov + */ + +#include +#include +#include +#include +#include +#include +#include "smd-rpm.h" + +#define RPM_KEY_BW 0x00007762 + +static struct qcom_icc_rpm { + struct qcom_smd_rpm *rpm; +} icc_rpm_smd; + +struct icc_rpm_smd_req { + __le32 key; + __le32 nbytes; + __le32 value; +}; + +bool qcom_icc_rpm_smd_available(void) +{ + if (!icc_rpm_smd.rpm) + return false; + + return true; +} +EXPORT_SYMBOL_GPL(qcom_icc_rpm_smd_available); + +int qcom_icc_rpm_smd_send(int ctx, int rsc_type, int id, u32 val) +{ + struct icc_rpm_smd_req req = { + .key = cpu_to_le32(RPM_KEY_BW), + .nbytes = cpu_to_le32(sizeof(u32)), + .value = cpu_to_le32(val), + }; + + return qcom_rpm_smd_write(icc_rpm_smd.rpm, ctx, rsc_type, id, &req, + sizeof(req)); +} +EXPORT_SYMBOL_GPL(qcom_icc_rpm_smd_send); + +static int qcom_icc_rpm_smd_probe(struct platform_device *pdev) +{ + icc_rpm_smd.rpm = dev_get_drvdata(pdev->dev.parent); + if (!icc_rpm_smd.rpm) { + dev_err(&pdev->dev, "unable to retrieve handle to RPM\n"); + return -ENODEV; + } + + return 0; +} + +static const struct of_device_id qcom_icc_rpm_smd_dt_match[] = { + { .compatible = "qcom,interconnect-smd-rpm", }, + { }, +}; + +MODULE_DEVICE_TABLE(of, qcom_icc_rpm_smd_dt_match); + +static struct platform_driver qcom_interconnect_rpm_smd_driver = { + .driver = { + .name = "qcom-interconnect-smd-rpm", + .of_match_table = qcom_icc_rpm_smd_dt_match, + }, + .probe = qcom_icc_rpm_smd_probe, +}; + +static int __init rpm_smd_interconnect_init(void) +{ + return platform_driver_register(&qcom_interconnect_rpm_smd_driver); +} +subsys_initcall(rpm_smd_interconnect_init); + +static void __exit rpm_smd_interconnect_exit(void) +{ + platform_driver_unregister(&qcom_interconnect_rpm_smd_driver); +} +module_exit(rpm_smd_interconnect_exit) + +MODULE_AUTHOR("Georgi Djakov "); +MODULE_DESCRIPTION("Qualcomm SMD RPM interconnect driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/interconnect/qcom/smd-rpm.h b/drivers/interconnect/qcom/smd-rpm.h new file mode 100644 index 000000000000..11c280eb86dc --- /dev/null +++ b/drivers/interconnect/qcom/smd-rpm.h @@ -0,0 +1,15 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2018, Linaro Ltd. + * Author: Georgi Djakov + */ + +#ifndef __DRIVERS_INTERCONNECT_QCOM_SMD_RPM_H +#define __DRIVERS_INTERCONNECT_QCOM_SMD_RPM_H + +#include + +bool qcom_icc_rpm_smd_available(void); +int qcom_icc_rpm_smd_send(int ctx, int rsc_type, int id, u32 val); + +#endif