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 X-Spam-Level: X-Spam-Status: No, score=-9.7 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1F59AC43141 for ; Mon, 18 Nov 2019 15:45:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E95212190F for ; Mon, 18 Nov 2019 15:45:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="D2Q6W68Z"; dkim=pass (1024-bit key) header.d=amazonses.com header.i=@amazonses.com header.b="Iftaw2Sl" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727420AbfKRPp2 (ORCPT ); Mon, 18 Nov 2019 10:45:28 -0500 Received: from a27-11.smtp-out.us-west-2.amazonses.com ([54.240.27.11]:55436 "EHLO a27-11.smtp-out.us-west-2.amazonses.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726216AbfKRPp1 (ORCPT ); Mon, 18 Nov 2019 10:45:27 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; s=zsmsymrwgfyinv5wlfyidntwsjeeldzt; d=codeaurora.org; t=1574091926; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=2cj4qHZmsJmHyQ6iWImmbXzGA/5lMEjyRQWbENWuLJg=; b=D2Q6W68Z4IskCPnFAWRpdcKfBnD1axeSDk2oZFR+vmepKuRXSa7Vv5EOC8RG1/+9 pspnqjxYnm/ZgMXQ9VgfNGIFkXhPkHXofCWovlI19sOcEo9t1x13Mmqx5yrL13JCJdB 2PfyrYndDPL8IqYEKm1T6mKauxQizhbeGFF6T3U0= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple; s=gdwg2y3kokkkj5a55z2ilkup5wp5hhxx; d=amazonses.com; t=1574091926; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References:MIME-Version:Content-Transfer-Encoding:Feedback-ID; bh=2cj4qHZmsJmHyQ6iWImmbXzGA/5lMEjyRQWbENWuLJg=; b=Iftaw2Sla6TQQkKZIFmhubYcKUbvjiDlmplPKdrAAwtBYiAGGe3Q3b5o2RmtbhIu sljm4FZJVAnZ+y6aUF0aJIF5hYMns7YTq0Ymd0WsnrHTqjb1xtLkOHnxnjEQ/7UxJcN TWUyinHOJibUrs66xHvsM5ylH8jeeCIKgHgkjrZA= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 387C4C447A9 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=sibis@codeaurora.org From: Sibi Sankar To: robh+dt@kernel.org, georgi.djakov@linaro.org Cc: bjorn.andersson@linaro.org, agross@kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org, mark.rutland@arm.com, evgreen@chromium.org, daidavid1@codeaurora.org, saravanak@google.com, viresh.kumar@linaro.org, Sibi Sankar Subject: [PATCH v3 2/2] interconnect: qcom: Add OSM L3 interconnect provider support Date: Mon, 18 Nov 2019 15:45:26 +0000 Message-ID: <0101016e7f30acfc-4aa6ed5b-90ba-43c4-ace1-7a163eb521bc-000000@us-west-2.amazonses.com> X-Mailer: git-send-email 2.22.1 In-Reply-To: <20191118154435.20357-1-sibis@codeaurora.org> References: <20191118154435.20357-1-sibis@codeaurora.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SES-Outgoing: 2019.11.18-54.240.27.11 Feedback-ID: 1.us-west-2.CZuq2qbDmUIuT3qdvXlRHZZCpfZqZ4GtG9v3VKgRyF0=:AmazonSES Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org On some Qualcomm SoCs, Operating State Manager (OSM) controls the resources of scaling L3 caches. Add a driver to handle bandwidth requests to OSM L3 from CPU/GPU. Signed-off-by: Sibi Sankar --- drivers/interconnect/qcom/Kconfig | 7 + drivers/interconnect/qcom/Makefile | 2 + drivers/interconnect/qcom/osm-l3.c | 284 +++++++++++++++++++++++++++++ 3 files changed, 293 insertions(+) create mode 100644 drivers/interconnect/qcom/osm-l3.c diff --git a/drivers/interconnect/qcom/Kconfig b/drivers/interconnect/qcom/Kconfig index ecf057d7e2409..17aee5b0f15b7 100644 --- a/drivers/interconnect/qcom/Kconfig +++ b/drivers/interconnect/qcom/Kconfig @@ -5,6 +5,13 @@ config INTERCONNECT_QCOM help Support for Qualcomm's Network-on-Chip interconnect hardware. +config INTERCONNECT_QCOM_OSM_L3 + tristate "Qualcomm OSM L3 interconnect driver" + depends on INTERCONNECT_QCOM || COMPILE_TEST + help + Say y here to support the Operating State Manager (OSM) interconnect + driver which controls the scaling of L3 caches on Qualcomm SoCs. + config INTERCONNECT_QCOM_QCS404 tristate "Qualcomm QCS404 interconnect driver" depends on INTERCONNECT_QCOM diff --git a/drivers/interconnect/qcom/Makefile b/drivers/interconnect/qcom/Makefile index 9adf9e380545e..8d86d6515ffc9 100644 --- a/drivers/interconnect/qcom/Makefile +++ b/drivers/interconnect/qcom/Makefile @@ -1,10 +1,12 @@ # SPDX-License-Identifier: GPL-2.0 +icc-osm-l3-objs := osm-l3.o qnoc-msm8974-objs := msm8974.o qnoc-qcs404-objs := qcs404.o qnoc-sdm845-objs := sdm845.o icc-smd-rpm-objs := smd-rpm.o +obj-$(CONFIG_INTERCONNECT_QCOM_OSM_L3) += icc-osm-l3.o obj-$(CONFIG_INTERCONNECT_QCOM_MSM8974) += qnoc-msm8974.o obj-$(CONFIG_INTERCONNECT_QCOM_QCS404) += qnoc-qcs404.o obj-$(CONFIG_INTERCONNECT_QCOM_SDM845) += qnoc-sdm845.o diff --git a/drivers/interconnect/qcom/osm-l3.c b/drivers/interconnect/qcom/osm-l3.c new file mode 100644 index 0000000000000..5e9f9ce02863b --- /dev/null +++ b/drivers/interconnect/qcom/osm-l3.c @@ -0,0 +1,284 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2019, The Linux Foundation. All rights reserved. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define LUT_MAX_ENTRIES 40U +#define LUT_SRC GENMASK(31, 30) +#define LUT_L_VAL GENMASK(7, 0) +#define LUT_ROW_SIZE 32 +#define CLK_HW_DIV 2 + +/* Register offsets */ +#define REG_ENABLE 0x0 +#define REG_FREQ_LUT 0x110 +#define REG_PERF_STATE 0x920 + +#define OSM_L3_MAX_LINKS 1 + +#define to_qcom_provider(_provider) \ + container_of(_provider, struct qcom_osm_l3_icc_provider, provider) + +enum { + SDM845_MASTER_OSM_L3_APPS = SLAVE_TCU + 1, + SDM845_SLAVE_OSM_L3, +}; + +struct qcom_osm_l3_icc_provider { + void __iomem *base; + unsigned int max_state; + unsigned long lut_tables[LUT_MAX_ENTRIES]; + struct icc_provider provider; +}; + +/** + * struct qcom_icc_node - Qualcomm specific interconnect nodes + * @name: the node name used in debugfs + * @links: an array of nodes where we can go next while traversing + * @id: a unique node identifier + * @num_links: the total number of @links + * @buswidth: width of the interconnect between a node and the bus + */ +struct qcom_icc_node { + const char *name; + u16 links[OSM_L3_MAX_LINKS]; + u16 id; + u16 num_links; + u16 buswidth; +}; + +struct qcom_icc_desc { + struct qcom_icc_node **nodes; + size_t num_nodes; +}; + +#define DEFINE_QNODE(_name, _id, _buswidth, ...) \ + static struct qcom_icc_node _name = { \ + .name = #_name, \ + .id = _id, \ + .buswidth = _buswidth, \ + .num_links = ARRAY_SIZE(((int[]){ __VA_ARGS__ })), \ + .links = { __VA_ARGS__ }, \ + } + +DEFINE_QNODE(osm_apps_l3, SDM845_MASTER_OSM_L3_APPS, 16, SDM845_SLAVE_OSM_L3); +DEFINE_QNODE(osm_l3, SDM845_SLAVE_OSM_L3, 16); + +static struct qcom_icc_node *sdm845_osm_l3_nodes[] = { + [MASTER_OSM_L3_APPS] = &osm_apps_l3, + [SLAVE_OSM_L3] = &osm_l3, +}; + +static struct qcom_icc_desc sdm845_osm_l3 = { + .nodes = sdm845_osm_l3_nodes, + .num_nodes = ARRAY_SIZE(sdm845_osm_l3_nodes), +}; + +static int qcom_icc_aggregate(struct icc_node *node, u32 tag, u32 avg_bw, + u32 peak_bw, u32 *agg_avg, u32 *agg_peak) +{ + *agg_avg += avg_bw; + *agg_peak = max_t(u32, *agg_peak, peak_bw); + + return 0; +} + +static int qcom_icc_set(struct icc_node *src, struct icc_node *dst) +{ + struct qcom_osm_l3_icc_provider *qp; + struct icc_provider *provider; + struct qcom_icc_node *qn; + struct icc_node *n; + unsigned int index; + u32 agg_peak = 0; + u32 agg_avg = 0; + u64 rate; + + qn = src->data; + provider = src->provider; + qp = to_qcom_provider(provider); + + list_for_each_entry(n, &provider->nodes, node_list) + qcom_icc_aggregate(n, 0, n->avg_bw, n->peak_bw, + &agg_avg, &agg_peak); + + rate = max(agg_avg, agg_peak); + rate = icc_units_to_bps(rate); + do_div(rate, qn->buswidth); + + for (index = 0; index < qp->max_state; index++) { + if (qp->lut_tables[index] >= rate) + break; + } + + writel_relaxed(index, qp->base + REG_PERF_STATE); + + return 0; +} + +static int qcom_osm_l3_remove(struct platform_device *pdev) +{ + struct qcom_osm_l3_icc_provider *qp = platform_get_drvdata(pdev); + struct icc_provider *provider = &qp->provider; + struct icc_node *n; + + list_for_each_entry(n, &provider->nodes, node_list) { + icc_node_del(n); + icc_node_destroy(n->id); + } + + return icc_provider_del(provider); +} + +static int qcom_osm_l3_probe(struct platform_device *pdev) +{ + u32 info, src, lval, i, prev_freq = 0, freq; + static unsigned long hw_rate, xo_rate; + struct qcom_osm_l3_icc_provider *qp; + const struct qcom_icc_desc *desc; + struct icc_onecell_data *data; + struct icc_provider *provider; + struct qcom_icc_node **qnodes; + struct icc_node *node; + size_t num_nodes; + struct clk *clk; + int ret; + + clk = clk_get(&pdev->dev, "xo"); + if (IS_ERR(clk)) + return PTR_ERR(clk); + + xo_rate = clk_get_rate(clk); + clk_put(clk); + + clk = clk_get(&pdev->dev, "alternate"); + if (IS_ERR(clk)) + return PTR_ERR(clk); + + hw_rate = clk_get_rate(clk) / CLK_HW_DIV; + clk_put(clk); + + qp = devm_kzalloc(&pdev->dev, sizeof(*qp), GFP_KERNEL); + if (!qp) + return -ENOMEM; + + qp->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(qp->base)) + return PTR_ERR(qp->base); + + /* HW should be in enabled state to proceed */ + if (!(readl_relaxed(qp->base + REG_ENABLE) & 0x1)) { + dev_err(&pdev->dev, "error hardware not enabled\n"); + return -ENODEV; + } + + for (i = 0; i < LUT_MAX_ENTRIES; i++) { + info = readl_relaxed(qp->base + REG_FREQ_LUT + + i * LUT_ROW_SIZE); + src = FIELD_GET(LUT_SRC, info); + lval = FIELD_GET(LUT_L_VAL, info); + if (src) + freq = xo_rate * lval; + else + freq = hw_rate; + + /* + * Two of the same frequencies with the same core counts means + * end of table + */ + if (i > 0 && prev_freq == freq) + break; + + qp->lut_tables[i] = freq; + prev_freq = freq; + } + qp->max_state = i; + + desc = of_device_get_match_data(&pdev->dev); + if (!desc) + return -EINVAL; + + qnodes = desc->nodes; + num_nodes = desc->num_nodes; + + data = devm_kcalloc(&pdev->dev, num_nodes, sizeof(*node), GFP_KERNEL); + if (!data) + return -ENOMEM; + + provider = &qp->provider; + provider->dev = &pdev->dev; + provider->set = qcom_icc_set; + provider->aggregate = qcom_icc_aggregate; + provider->xlate = of_icc_xlate_onecell; + INIT_LIST_HEAD(&provider->nodes); + provider->data = data; + + ret = icc_provider_add(provider); + if (ret) { + dev_err(&pdev->dev, "error adding interconnect provider\n"); + return ret; + } + + for (i = 0; i < num_nodes; i++) { + size_t j; + + node = icc_node_create(qnodes[i]->id); + if (IS_ERR(node)) { + ret = PTR_ERR(node); + goto err; + } + + node->name = qnodes[i]->name; + node->data = qnodes[i]; + icc_node_add(node, provider); + + dev_dbg(&pdev->dev, "registered node %p %s %d\n", node, + qnodes[i]->name, node->id); + + /* populate links */ + for (j = 0; j < qnodes[i]->num_links; j++) + icc_link_create(node, qnodes[i]->links[j]); + + data->nodes[i] = node; + } + data->num_nodes = num_nodes; + + platform_set_drvdata(pdev, qp); + + return ret; +err: + qcom_osm_l3_remove(pdev); + return ret; +} + +static const struct of_device_id osm_l3_of_match[] = { + { .compatible = "qcom,sdm845-osm-l3", .data = &sdm845_osm_l3 }, + { }, +}; +MODULE_DEVICE_TABLE(of, osm_l3_of_match); + +static struct platform_driver osm_l3_driver = { + .probe = qcom_osm_l3_probe, + .remove = qcom_osm_l3_remove, + .driver = { + .name = "osm-l3", + .of_match_table = osm_l3_of_match, + }, +}; +module_platform_driver(osm_l3_driver); + +MODULE_DESCRIPTION("Qualcomm OSM L3 interconnect driver"); +MODULE_LICENSE("GPL v2"); -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project