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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DA2C4CCA47B for ; Mon, 11 Jul 2022 13:54:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229968AbiGKNyD (ORCPT ); Mon, 11 Jul 2022 09:54:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50122 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230213AbiGKNx5 (ORCPT ); Mon, 11 Jul 2022 09:53:57 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8EC0F3C8F6; Mon, 11 Jul 2022 06:53:56 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 29707614E4; Mon, 11 Jul 2022 13:53:56 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 26A85C34115; Mon, 11 Jul 2022 13:53:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1657547635; bh=caL07f0ZrqZjLNrdweHxAxsixM8nX4rbPbMW6ZYxsV0=; h=Date:Subject:To:References:From:In-Reply-To:From; b=mjcLQAZ2hiumn0Rhx5n0oqEfEPs3iWu4Ef3cICqJ/e0aEdPsHK+6uTVnVmyI/PgOX 5/Q4FgJ8udz3ZHaCcNlWI3urxE+qi3N5a2Swl7WeGW3RTrBWmasCNF0rwMCQaG8fsI MBT9yNmNhEbEviQ9WMswhT4q50Q8rOKFnUpCS/rSAH7Q6FxRRv8DUoYFPNkOV62rXT 6sR2OQp8GnuWL3INmgM2nagbgmYuhO74Y9r4t2sLAd9Gb0xo53JdQrsIlVn3SHiXpP B9O8HDwxv1ejO3Koq5QhYyInUOXHK26f7kxqfPuB3UQovAzRfljun6+3GrOAF+qv0L nh1CjE/CuubYg== Message-ID: <480d38db-3114-29d1-8b81-b35a07623060@kernel.org> Date: Mon, 11 Jul 2022 16:53:47 +0300 MIME-Version: 1.0 Subject: Re: [PATCH v5 5/5] interconnect: qcom: icc-rpm: Set bandwidth and clock for bucket values Content-Language: en-US To: Leo Yan , Andy Gross , Bjorn Andersson , Krzysztof Kozlowski , Konrad Dybcio , Rob Herring , Bryan O'Donoghue , linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20220711115240.806236-1-leo.yan@linaro.org> <20220711115240.806236-6-leo.yan@linaro.org> From: Georgi Djakov In-Reply-To: <20220711115240.806236-6-leo.yan@linaro.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Hi Leo, On 11.07.22 14:52, Leo Yan wrote: > 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 value of aggregated average bandwidth across all > buckets. > > The maximum aggregated average is 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 | 75 +++++++++++++++++++++++------ > 1 file changed, 61 insertions(+), 14 deletions(-) > > diff --git a/drivers/interconnect/qcom/icc-rpm.c b/drivers/interconnect/qcom/icc-rpm.c > index d27b1582521f..f15f5deee6ef 100644 > --- a/drivers/interconnect/qcom/icc-rpm.c > +++ b/drivers/interconnect/qcom/icc-rpm.c > @@ -302,18 +302,57 @@ 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 > + */ > +static void qcom_icc_bus_aggregate(struct icc_provider *provider, > + u64 *agg_avg, u64 *agg_peak, > + u64 *max_agg_avg) > +{ > + 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; > + > + /* > + * 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]); > +} > + > 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; Now max_agg_peak is unused? Thanks, Georgi