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[83.9.29.188]) by smtp.gmail.com with ESMTPSA id m16-20020a195210000000b004fe48332852sm884773lfb.136.2023.08.11.16.16.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 11 Aug 2023 16:16:19 -0700 (PDT) From: Konrad Dybcio Date: Sat, 12 Aug 2023 01:16:15 +0200 Subject: [PATCH v2 1/2] interconnect: qcom: bcm-voter: Improve enable_mask handling MIME-Version: 1.0 Message-Id: <20230811-topic-icc_fix_1he-v2-1-0620af8ac133@linaro.org> References: <20230811-topic-icc_fix_1he-v2-0-0620af8ac133@linaro.org> In-Reply-To: <20230811-topic-icc_fix_1he-v2-0-0620af8ac133@linaro.org> To: Andy Gross , Bjorn Andersson , Georgi Djakov , Mike Tipton , Neil Armstrong Cc: Marijn Suijten , linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, Konrad Dybcio , Bjorn Andersson X-Mailer: b4 0.12.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1691795777; l=2645; i=konrad.dybcio@linaro.org; s=20230215; h=from:subject:message-id; bh=/nUZR/0rc3yqrbbrAEz7dJ1RQ7GveO6vo5M4t98V7rI=; b=yopVK/ZtfM2RmTl6QHD084IAaGO1rxaQJR19IYJTnKafbeqsyktjQSPYOLzSrCbn91x+tG8EF YWSZ2ucOpQnA+f8Y/xdRXBIjNbFIN81JMy0eRcY7hbDA8Bg+cyWwlPI X-Developer-Key: i=konrad.dybcio@linaro.org; a=ed25519; pk=iclgkYvtl2w05SSXO5EjjSYlhFKsJ+5OSZBjOkQuEms= Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org We don't need all the complex arithmetic for BCMs utilizing enable_mask, as all we need to do is to determine whether there's any user (or keepalive) asking for it to be on. Separate the logic for such BCMs for a small speed boost. Suggested-by: Bjorn Andersson Reviewed-by: Bjorn Andersson Signed-off-by: Konrad Dybcio --- drivers/interconnect/qcom/bcm-voter.c | 43 +++++++++++++++++++++++++++++------ 1 file changed, 36 insertions(+), 7 deletions(-) diff --git a/drivers/interconnect/qcom/bcm-voter.c b/drivers/interconnect/qcom/bcm-voter.c index d5f2a6b5376b..d857eb8838b9 100644 --- a/drivers/interconnect/qcom/bcm-voter.c +++ b/drivers/interconnect/qcom/bcm-voter.c @@ -58,6 +58,36 @@ static u64 bcm_div(u64 num, u32 base) return num; } +/* BCMs with enable_mask use one-hot-encoding for on/off signaling */ +static void bcm_aggregate_mask(struct qcom_icc_bcm *bcm) +{ + struct qcom_icc_node *node; + int bucket, i; + + for (bucket = 0; bucket < QCOM_ICC_NUM_BUCKETS; bucket++) { + bcm->vote_x[bucket] = 0; + bcm->vote_y[bucket] = 0; + + for (i = 0; i < bcm->num_nodes; i++) { + node = bcm->nodes[i]; + + /* If any vote in this bucket exists, keep the BCM enabled */ + if (node->sum_avg[bucket] || node->max_peak[bucket]) { + bcm->vote_x[bucket] = 0; + bcm->vote_y[bucket] = bcm->enable_mask; + break; + } + } + } + + if (bcm->keepalive) { + bcm->vote_x[QCOM_ICC_BUCKET_AMC] = 1; + bcm->vote_x[QCOM_ICC_BUCKET_WAKE] = 1; + bcm->vote_y[QCOM_ICC_BUCKET_AMC] = 1; + bcm->vote_y[QCOM_ICC_BUCKET_WAKE] = 1; + } +} + static void bcm_aggregate(struct qcom_icc_bcm *bcm) { struct qcom_icc_node *node; @@ -83,11 +113,6 @@ static void bcm_aggregate(struct qcom_icc_bcm *bcm) temp = agg_peak[bucket] * bcm->vote_scale; bcm->vote_y[bucket] = bcm_div(temp, bcm->aux_data.unit); - - if (bcm->enable_mask && (bcm->vote_x[bucket] || bcm->vote_y[bucket])) { - bcm->vote_x[bucket] = 0; - bcm->vote_y[bucket] = bcm->enable_mask; - } } if (bcm->keepalive && bcm->vote_x[QCOM_ICC_BUCKET_AMC] == 0 && @@ -260,8 +285,12 @@ int qcom_icc_bcm_voter_commit(struct bcm_voter *voter) return 0; mutex_lock(&voter->lock); - list_for_each_entry(bcm, &voter->commit_list, list) - bcm_aggregate(bcm); + list_for_each_entry(bcm, &voter->commit_list, list) { + if (bcm->enable_mask) + bcm_aggregate_mask(bcm); + else + bcm_aggregate(bcm); + } /* * Pre sort the BCMs based on VCD for ease of generating a command list