From patchwork Tue Jun 11 16:41:56 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Georgi Djakov X-Patchwork-Id: 10987793 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 40AC976 for ; Tue, 11 Jun 2019 16:42:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 321652857E for ; Tue, 11 Jun 2019 16:42:38 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 25F1D287F3; Tue, 11 Jun 2019 16:42:38 +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=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9233E2857E for ; Tue, 11 Jun 2019 16:42:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2405699AbfFKQmc (ORCPT ); Tue, 11 Jun 2019 12:42:32 -0400 Received: from mail-lf1-f68.google.com ([209.85.167.68]:34885 "EHLO mail-lf1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2405692AbfFKQmP (ORCPT ); Tue, 11 Jun 2019 12:42:15 -0400 Received: by mail-lf1-f68.google.com with SMTP id a25so9842536lfg.2 for ; Tue, 11 Jun 2019 09:42:12 -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 :mime-version:content-transfer-encoding; bh=yqRvC4t/KJZ7EpjmV+PMrX0EoO+pq9e/AYZP8BykWf4=; b=q9ISHTff+JXNactLIbp/cZNGUfme34QpdPii/dK3d2ci5PhrRRWD8LOVWRaRc9DPAY SJfTgnlx4OA2BZqEtFswt8syvTAhzsKCe4AHfHoylNHoAN4DNOKt4J6DXGdOHsgmC0Eg dmGCDoyB1JfW7nzUP6DhfZWLuzH8v1jGp9UTEvO+NX8iz1MHELgjxWaPL4kPQVp4J1dg XDFlUKJ+nFG1ifwMPXnppezjuK8dXZmF+gBmoHcl9ZyKVblJZJ5jBuKEkUwUvhDITOan wR41W0f5lqylnttgbwSkVuuse+H+x44KHohtVjV2RZvjl4qoafNY66Dal4I7XLAFhC0k YCcQ== 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:mime-version:content-transfer-encoding; bh=yqRvC4t/KJZ7EpjmV+PMrX0EoO+pq9e/AYZP8BykWf4=; b=tlQMp2cjlZhoQl4loLoCttRE5yBT5D0SqpBAFazPaQXCGg8RLVBuHJwxe1Gu0EiwSK GlJZVziqMsbQis47uJpxWE7dWBdoSMZyoJcHdnrMSjmdfbF0Rk+muwmshf23PbrMH7QZ GY2RTKqtb+EuAh4s+e6HRXH6Fxhh5beVt11gQzVBCn1zyUsDvMo73EMxwHSDqH5udj3I 3DP4HwDNsv1qNjEwi8g9p2evPntTk6xZAY7ye1Y8ZFqasPnpLVoNsmpP6nZe//tAWdVg DP/8lban6PVdIAwEMT4D7zTpni7egraX+vZZCFDXmUEyG/c2oDwza/ZukFazvnqLIuR1 jobQ== X-Gm-Message-State: APjAAAVMtsiKQjZaad+FZJTI0qxH8b4oTrzr4zTPZcLDO0hsV0his+/h APGBrW9m8guODivDG5DWyYX2Vw== X-Google-Smtp-Source: APXvYqzTJ7hxLn04ZvDtmGZaQC3jNGDbykdGpc6OSGsqBmyC6WdppQuhSLfe6bCmR7AYE18fn7D1XQ== X-Received: by 2002:a19:6519:: with SMTP id z25mr37756963lfb.73.1560271332028; Tue, 11 Jun 2019 09:42:12 -0700 (PDT) Received: from localhost.localdomain ([212.45.67.2]) by smtp.googlemail.com with ESMTPSA id r14sm2616772lff.44.2019.06.11.09.42.10 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Tue, 11 Jun 2019 09:42:11 -0700 (PDT) From: Georgi Djakov To: robh+dt@kernel.org, bjorn.andersson@linaro.org, agross@kernel.org, georgi.djakov@linaro.org Cc: vkoul@kernel.org, evgreen@chromium.org, daidavid1@codeaurora.org, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org Subject: [PATCH v3 4/5] interconnect: qcom: Add interconnect SMD over SMD driver Date: Tue, 11 Jun 2019 19:41:56 +0300 Message-Id: <20190611164157.24656-5-georgi.djakov@linaro.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190611164157.24656-1-georgi.djakov@linaro.org> References: <20190611164157.24656-1-georgi.djakov@linaro.org> MIME-Version: 1.0 Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.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 --- v3: - New patch. drivers/interconnect/qcom/Kconfig | 9 ++++ drivers/interconnect/qcom/Makefile | 2 + drivers/interconnect/qcom/smd-rpm.c | 72 +++++++++++++++++++++++++++++ drivers/interconnect/qcom/smd-rpm.h | 15 ++++++ 4 files changed, 98 insertions(+) create mode 100644 drivers/interconnect/qcom/smd-rpm.c create mode 100644 drivers/interconnect/qcom/smd-rpm.h diff --git a/drivers/interconnect/qcom/Kconfig b/drivers/interconnect/qcom/Kconfig index e76e3e248c41..b0eade1da5d5 100644 --- a/drivers/interconnect/qcom/Kconfig +++ b/drivers/interconnect/qcom/Kconfig @@ -9,6 +9,7 @@ config INTERCONNECT_QCOM_QCS404 tristate "Qualcomm QCS404 interconnect driver" depends on INTERCONNECT_QCOM depends on QCOM_SMD_RPM || COMPILE_TEST + select INTERCONNECT_QCOM_SMD_RPM help This is a driver for the Qualcomm Network-on-Chip on qcs404-based platforms. @@ -20,3 +21,11 @@ config INTERCONNECT_QCOM_SDM845 help This is a driver for the Qualcomm Network-on-Chip on sdm845-based platforms. + +config INTERCONNECT_QCOM_SMD_RPM + tristate "Qualcomm SMD RPM interconnect driver" + depends on INTERCONNECT_QCOM + depends on QCOM_SMD_RPM || COMPILE_TEST + 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 index 059ff325ee6c..67dafb783dec 100644 --- a/drivers/interconnect/qcom/Makefile +++ b/drivers/interconnect/qcom/Makefile @@ -2,6 +2,8 @@ qnoc-qcs404-objs := qcs404.o qnoc-sdm845-objs := sdm845.o +icc-smd-rpm-objs := smd-rpm.o obj-$(CONFIG_INTERCONNECT_QCOM_QCS404) += qnoc-qcs404.o obj-$(CONFIG_INTERCONNECT_QCOM_SDM845) += qnoc-sdm845.o +obj-$(CONFIG_INTERCONNECT_QCOM_SMD_RPM) += icc-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..af22c0a293e6 --- /dev/null +++ b/drivers/interconnect/qcom/smd-rpm.c @@ -0,0 +1,72 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * RPM over SMD communication wrapper for interconnects + * + * Copyright (C) 2019 Linaro Ltd + * Author: Georgi Djakov + */ + +#include +#include +#include +#include +#include +#include + +#include "smd-rpm.h" + +#define RPM_KEY_BW 0x00007762 + +static struct qcom_smd_rpm *icc_smd_rpm; + +struct icc_rpm_smd_req { + __le32 key; + __le32 nbytes; + __le32 value; +}; + +bool qcom_icc_rpm_smd_available(void) +{ + if (!icc_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_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_smd_rpm = dev_get_drvdata(pdev->dev.parent); + + if (!icc_smd_rpm) { + dev_err(&pdev->dev, "unable to retrieve handle to RPM\n"); + return -ENODEV; + } + + return 0; +} + +static struct platform_driver qcom_interconnect_rpm_smd_driver = { + .driver = { + .name = "icc_smd_rpm", + }, + .probe = qcom_icc_rpm_smd_probe, +}; +module_platform_driver(qcom_interconnect_rpm_smd_driver); +MODULE_AUTHOR("Georgi Djakov "); +MODULE_DESCRIPTION("Qualcomm SMD RPM interconnect proxy driver"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:icc_smd_rpm"); diff --git a/drivers/interconnect/qcom/smd-rpm.h b/drivers/interconnect/qcom/smd-rpm.h new file mode 100644 index 000000000000..ca9d0327b8ac --- /dev/null +++ b/drivers/interconnect/qcom/smd-rpm.h @@ -0,0 +1,15 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2019, 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