From patchwork Mon Jul 4 09:30:29 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Leo Yan X-Patchwork-Id: 587573 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7332FCCA482 for ; Mon, 4 Jul 2022 09:32:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233757AbiGDJcd (ORCPT ); Mon, 4 Jul 2022 05:32:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54792 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233713AbiGDJb7 (ORCPT ); Mon, 4 Jul 2022 05:31:59 -0400 Received: from mail-pf1-x42e.google.com (mail-pf1-x42e.google.com [IPv6:2607:f8b0:4864:20::42e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5B24CDFD8 for ; Mon, 4 Jul 2022 02:30:54 -0700 (PDT) Received: by mail-pf1-x42e.google.com with SMTP id n12so8508719pfq.0 for ; Mon, 04 Jul 2022 02:30:54 -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=mOcKN2QE8NoS+NlXFqyzvr6uXu60h5tTF9oQlF/WJLc=; b=KILEUB0HZOxwkq5/XBeqjn/uei8YrkNrsJVZViPmOdE2EraFxs3gPVlS9vaVFq0XsV xyilJcHWtyG1L6ky2NJLYlqtWCz5pz9rwz8N2XqcIN6xzN5JMbDz4j45LRocgI6xjf5Q xPiPdfHH1DUNY6GGxTSz6SlQLuWWdgw7Md/KsLQ0v8utLsy0q+ZMkq+BbxntG8pZ+hSa cd4cbVLrBZTXVniEh8tK7lRVrIPmjEqGB6bKca0jeduHPKZ/X1OTqn8CgHgtA4WWReS6 e1pUIl2I5ma9I2/6Mjx5WNsCc0XSG+gYr4I/GyOYsEdOj4FRn9hJR7qiqRpmf2nf2Db2 gegg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=mOcKN2QE8NoS+NlXFqyzvr6uXu60h5tTF9oQlF/WJLc=; b=aHubsv7QPLQKkpl4z69EybUCEJjno8BUperFlq86mKztpkrswmCe4XhprGX8rGxWOC 198zQE+QW4ySVrolV2CRO7nQWk728h5Nlhk5CthVu8QhkKpToD96e4UlZ3qEjnpkJ8lv ns2+GniDxAJPooTeTyonMrXfiX1f41oGzo4/a5MnJoE3t9Oe+023jdkHbuSmxx8k/QaK fI1FVfXYP7JJkQ28lMAL7yXZ94PJgopgfHxO6U1j3QqgdkxoNqOyClR7Pir/yWFi0zWt Lwfn3Jo8147+CwSQVxRCaUJv23K+BIy3OOWP9X8Q96RZOx8EQU5VHTVhFz4C8hTdo4Zi omUw== X-Gm-Message-State: AJIora9f+DJRQztlp4c5BBi8qBzNel61iMk9a3SkVqI46Yx2LfjuhWv/ wQ72mnZuhOJQtuGIsP+rKQw/fQ== X-Google-Smtp-Source: AGRyM1vbOAdyX1y53+MovHgyFoSWwnefAVPm2My0x0WH3rIth0QFaye33BFc8w+KNPH6F45CqTuocg== X-Received: by 2002:a63:69c9:0:b0:411:994d:1e12 with SMTP id e192-20020a6369c9000000b00411994d1e12mr20645259pgc.383.1656927053749; Mon, 04 Jul 2022 02:30:53 -0700 (PDT) Received: from leo-build-box.lan ([154.3.32.171]) by smtp.gmail.com with ESMTPSA id ms16-20020a17090b235000b001ef81bac701sm2926177pjb.42.2022.07.04.02.30.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 Jul 2022 02:30:53 -0700 (PDT) From: Leo Yan To: Andy Gross , Bjorn Andersson , Georgi Djakov , Rob Herring , Krzysztof Kozlowski , linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Bryan O'Donoghue Cc: Leo Yan Subject: [PATCH v3 5/5] interconnect: qcom: icc-rpm: Set bandwidth and clock for bucket values Date: Mon, 4 Jul 2022 17:30:29 +0800 Message-Id: <20220704093029.1126609-6-leo.yan@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220704093029.1126609-1-leo.yan@linaro.org> References: <20220704093029.1126609-1-leo.yan@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org This commit uses buckets for support bandwidth and clock rates. It introduces a new function qcom_icc_bus_aggregate() to calculate the aggregate average and peak bandwidths for every bucket, and also it calculates the maximum aggregate values across all buckets. The maximum aggregate values are used to calculate the final bandwidth requests. And we can set the clock rate per bucket, we use SLEEP bucket as default bucket if a platform doesn't enable the interconnect path tags in DT binding; otherwise, we use WAKE bucket to set active clock and use SLEEP bucket for other clocks. So far we don't use AMC bucket. Signed-off-by: Leo Yan --- drivers/interconnect/qcom/icc-rpm.c | 80 ++++++++++++++++++++++++----- 1 file changed, 67 insertions(+), 13 deletions(-) diff --git a/drivers/interconnect/qcom/icc-rpm.c b/drivers/interconnect/qcom/icc-rpm.c index b025fc6b97c9..4b932eb807c7 100644 --- a/drivers/interconnect/qcom/icc-rpm.c +++ b/drivers/interconnect/qcom/icc-rpm.c @@ -302,18 +302,62 @@ static int qcom_icc_bw_aggregate(struct icc_node *node, u32 tag, u32 avg_bw, return 0; } +/** + * qcom_icc_bus_aggregate - aggregate bandwidth by traversing all nodes + * @provider: generic interconnect provider + * @agg_avg: an array for aggregated average bandwidth of buckets + * @agg_peak: an array for aggregated peak bandwidth of buckets + * @max_agg_avg: pointer to max value of aggregated average bandwidth + * @max_agg_peak: pointer to max value of aggregated peak bandwidth + */ +static void qcom_icc_bus_aggregate(struct icc_provider *provider, + u64 *agg_avg, u64 *agg_peak, + u64 *max_agg_avg, u64 *max_agg_peak) +{ + struct icc_node *node; + struct qcom_icc_node *qn; + int i; + + /* Initialise aggregate values */ + for (i = 0; i < QCOM_ICC_NUM_BUCKETS; i++) { + agg_avg[i] = 0; + agg_peak[i] = 0; + } + + *max_agg_avg = 0; + *max_agg_peak = 0; + + /* + * Iterate nodes on the interconnect and aggregate bandwidth + * requests for every bucket. + */ + list_for_each_entry(node, &provider->nodes, node_list) { + qn = node->data; + for (i = 0; i < QCOM_ICC_NUM_BUCKETS; i++) { + agg_avg[i] += qn->sum_avg[i]; + agg_peak[i] = max_t(u64, agg_peak[i], qn->max_peak[i]); + } + } + + /* Find maximum values across all buckets */ + for (i = 0; i < QCOM_ICC_NUM_BUCKETS; i++) { + *max_agg_avg = max_t(u64, *max_agg_avg, agg_avg[i]); + *max_agg_peak = max_t(u64, *max_agg_peak, agg_peak[i]); + } +} + static int qcom_icc_set(struct icc_node *src, struct icc_node *dst) { struct qcom_icc_provider *qp; struct qcom_icc_node *src_qn = NULL, *dst_qn = NULL; struct icc_provider *provider; - struct icc_node *n; u64 sum_bw; u64 max_peak_bw; u64 rate; - u32 agg_avg = 0; - u32 agg_peak = 0; + u64 agg_avg[QCOM_ICC_NUM_BUCKETS], agg_peak[QCOM_ICC_NUM_BUCKETS]; + u64 max_agg_avg, max_agg_peak; int ret, i; + int bucket; src_qn = src->data; if (dst) @@ -321,12 +365,11 @@ static int qcom_icc_set(struct icc_node *src, struct icc_node *dst) provider = src->provider; qp = to_qcom_provider(provider); - list_for_each_entry(n, &provider->nodes, node_list) - provider->aggregate(n, 0, n->avg_bw, n->peak_bw, - &agg_avg, &agg_peak); + qcom_icc_bus_aggregate(provider, agg_avg, agg_peak, &max_agg_avg, + &max_agg_peak); - sum_bw = icc_units_to_bps(agg_avg); - max_peak_bw = icc_units_to_bps(agg_peak); + sum_bw = icc_units_to_bps(max_agg_avg); + max_peak_bw = icc_units_to_bps(max_agg_peak); ret = __qcom_icc_set(src, src_qn, sum_bw); if (ret) @@ -337,12 +380,23 @@ static int qcom_icc_set(struct icc_node *src, struct icc_node *dst) return ret; } - rate = max(sum_bw, max_peak_bw); - - do_div(rate, src_qn->buswidth); - rate = min_t(u64, rate, LONG_MAX); - for (i = 0; i < qp->num_clks; i++) { + /* + * Use WAKE bucket for active clock, otherwise, use SLEEP bucket + * for other clocks. If a platform doesn't set interconnect + * path tags, by default use sleep bucket for all clocks. + * + * Note, AMC bucket is not supported yet. + */ + if (!strcmp(qp->bus_clks[i].id, "bus_a")) + bucket = QCOM_ICC_BUCKET_WAKE; + else + bucket = QCOM_ICC_BUCKET_SLEEP; + + rate = icc_units_to_bps(max(agg_avg[bucket], agg_peak[bucket])); + do_div(rate, src_qn->buswidth); + rate = min_t(u64, rate, LONG_MAX); + if (qp->bus_clk_rate[i] == rate) continue;