From patchwork Tue Jun 23 04:08:11 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Tipton X-Patchwork-Id: 11619717 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 410FA138C for ; Tue, 23 Jun 2020 04:08:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 293122078E for ; Tue, 23 Jun 2020 04:08:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="hiHnRm4C" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728275AbgFWEIu (ORCPT ); Tue, 23 Jun 2020 00:08:50 -0400 Received: from mail29.static.mailgun.info ([104.130.122.29]:39604 "EHLO mail29.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732198AbgFWEIu (ORCPT ); Tue, 23 Jun 2020 00:08:50 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1592885328; h=Content-Transfer-Encoding: MIME-Version: References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=5m+5niclwDk74XQIzoFk8E1FDh87wnYg8/Tfofn+4C4=; b=hiHnRm4Ciq6nKOOeypjdEtwJ8MZ4b3eXQnRb5Xpac4f2wF7jm2kvTzUA0/uXHVysvdy8+J70 E+uXPittfiYQM3KmETS/GdB5ZMsRV3sLDisb4lSfb7jbMHuJgNy73QIlxjA4J/2Jp4U4yt2t C14Dmr5P6CMm+nOX45jx7pSHYx8= X-Mailgun-Sending-Ip: 104.130.122.29 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n19.prod.us-east-1.postgun.com with SMTP id 5ef1803f86de6ccd442088c9 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Tue, 23 Jun 2020 04:08:31 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id AEE30C43391; Tue, 23 Jun 2020 04:08:30 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE, URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mdtipton-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: mdtipton) by smtp.codeaurora.org (Postfix) with ESMTPSA id 9A406C433CA; Tue, 23 Jun 2020 04:08:29 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 9A406C433CA 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=mdtipton@codeaurora.org From: Mike Tipton To: georgi.djakov@linaro.org Cc: bjorn.andersson@linaro.org, agross@kernel.org, linux-pm@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, Mike Tipton Subject: [PATCH 1/4] interconnect: qcom: Support bcm-voter-specific TCS wait behavior Date: Mon, 22 Jun 2020 21:08:11 -0700 Message-Id: <20200623040814.23791-2-mdtipton@codeaurora.org> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20200623040814.23791-1-mdtipton@codeaurora.org> References: <20200623040814.23791-1-mdtipton@codeaurora.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 Currently, all bcm-voters set tcs_cmd::wait=true for the last VCD command in each TCS (AMC, WAKE, and SLEEP). However, some bcm-voters don't need the completion and instead need to optimize for latency. For instance, disabling wait-for-completion in the WAKE set can decrease resume latency and allow for certain operations to occur in parallel with the WAKE TCS triggering. This is only safe in very specific situations. Keep the default behavior of always waiting, but allow it to be overridden in devicetree. Signed-off-by: Mike Tipton --- drivers/interconnect/qcom/bcm-voter.c | 32 ++++++++++++++++++--------- 1 file changed, 21 insertions(+), 11 deletions(-) diff --git a/drivers/interconnect/qcom/bcm-voter.c b/drivers/interconnect/qcom/bcm-voter.c index 2a11a63e7217..e9f66f5c8a91 100644 --- a/drivers/interconnect/qcom/bcm-voter.c +++ b/drivers/interconnect/qcom/bcm-voter.c @@ -27,6 +27,7 @@ static DEFINE_MUTEX(bcm_voter_lock); * @commit_list: list containing bcms to be committed to hardware * @ws_list: list containing bcms that have different wake/sleep votes * @voter_node: list of bcm voters + * @tcs_wait: mask for which buckets require TCS completion */ struct bcm_voter { struct device *dev; @@ -35,6 +36,7 @@ struct bcm_voter { struct list_head commit_list; struct list_head ws_list; struct list_head voter_node; + u32 tcs_wait; }; static int cmp_vcd(void *priv, struct list_head *a, struct list_head *b) @@ -89,7 +91,7 @@ static void bcm_aggregate(struct qcom_icc_bcm *bcm) } static inline void tcs_cmd_gen(struct tcs_cmd *cmd, u64 vote_x, u64 vote_y, - u32 addr, bool commit) + u32 addr, bool commit, bool wait) { bool valid = true; @@ -114,15 +116,16 @@ static inline void tcs_cmd_gen(struct tcs_cmd *cmd, u64 vote_x, u64 vote_y, * Set the wait for completion flag on command that need to be completed * before the next command. */ - cmd->wait = commit; + cmd->wait = wait; } -static void tcs_list_gen(struct list_head *bcm_list, int bucket, - struct tcs_cmd tcs_list[MAX_BCMS], +static void tcs_list_gen(struct bcm_voter *voter, int bucket, + struct tcs_cmd tcs_list[MAX_VCD], int n[MAX_VCD + 1]) { + struct list_head *bcm_list = &voter->commit_list; struct qcom_icc_bcm *bcm; - bool commit; + bool commit, wait; size_t idx = 0, batch = 0, cur_vcd_size = 0; memset(n, 0, sizeof(int) * (MAX_VCD + 1)); @@ -135,8 +138,11 @@ static void tcs_list_gen(struct list_head *bcm_list, int bucket, commit = true; cur_vcd_size = 0; } + + wait = commit && (voter->tcs_wait & BIT(bucket)); + tcs_cmd_gen(&tcs_list[idx], bcm->vote_x[bucket], - bcm->vote_y[bucket], bcm->addr, commit); + bcm->vote_y[bucket], bcm->addr, commit, wait); idx++; n[batch]++; /* @@ -261,8 +267,7 @@ int qcom_icc_bcm_voter_commit(struct bcm_voter *voter) * Construct the command list based on a pre ordered list of BCMs * based on VCD. */ - tcs_list_gen(&voter->commit_list, QCOM_ICC_BUCKET_AMC, cmds, commit_idx); - + tcs_list_gen(voter, QCOM_ICC_BUCKET_AMC, cmds, commit_idx); if (!commit_idx[0]) goto out; @@ -302,7 +307,7 @@ int qcom_icc_bcm_voter_commit(struct bcm_voter *voter) list_sort(NULL, &voter->commit_list, cmp_vcd); - tcs_list_gen(&voter->commit_list, QCOM_ICC_BUCKET_WAKE, cmds, commit_idx); + tcs_list_gen(voter, QCOM_ICC_BUCKET_WAKE, cmds, commit_idx); ret = rpmh_write_batch(voter->dev, RPMH_WAKE_ONLY_STATE, cmds, commit_idx); if (ret) { @@ -310,7 +315,7 @@ int qcom_icc_bcm_voter_commit(struct bcm_voter *voter) goto out; } - tcs_list_gen(&voter->commit_list, QCOM_ICC_BUCKET_SLEEP, cmds, commit_idx); + tcs_list_gen(voter, QCOM_ICC_BUCKET_SLEEP, cmds, commit_idx); ret = rpmh_write_batch(voter->dev, RPMH_SLEEP_STATE, cmds, commit_idx); if (ret) { @@ -329,6 +334,7 @@ EXPORT_SYMBOL_GPL(qcom_icc_bcm_voter_commit); static int qcom_icc_bcm_voter_probe(struct platform_device *pdev) { + struct device_node *np = pdev->dev.of_node; struct bcm_voter *voter; voter = devm_kzalloc(&pdev->dev, sizeof(*voter), GFP_KERNEL); @@ -336,7 +342,11 @@ static int qcom_icc_bcm_voter_probe(struct platform_device *pdev) return -ENOMEM; voter->dev = &pdev->dev; - voter->np = pdev->dev.of_node; + voter->np = np; + + if (of_property_read_u32(np, "qcom,tcs-wait", &voter->tcs_wait)) + voter->tcs_wait = QCOM_ICC_TAG_ALWAYS; + mutex_init(&voter->lock); INIT_LIST_HEAD(&voter->commit_list); INIT_LIST_HEAD(&voter->ws_list); From patchwork Tue Jun 23 04:08:12 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Tipton X-Patchwork-Id: 11619725 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8809B13B1 for ; Tue, 23 Jun 2020 04:09:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 70433207BC for ; 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Tue, 23 Jun 2020 04:08:31 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id DC6A0C433A1; Tue, 23 Jun 2020 04:08:30 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE, URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mdtipton-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: mdtipton) by smtp.codeaurora.org (Postfix) with ESMTPSA id 1977BC433CB; Tue, 23 Jun 2020 04:08:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 1977BC433CB 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=mdtipton@codeaurora.org From: Mike Tipton To: georgi.djakov@linaro.org Cc: bjorn.andersson@linaro.org, agross@kernel.org, linux-pm@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, Mike Tipton Subject: [PATCH 2/4] interconnect: qcom: Only wait for completion in AMC/WAKE by default Date: Mon, 22 Jun 2020 21:08:12 -0700 Message-Id: <20200623040814.23791-3-mdtipton@codeaurora.org> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20200623040814.23791-1-mdtipton@codeaurora.org> References: <20200623040814.23791-1-mdtipton@codeaurora.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 Change the default TCS wait behavior to only wait for completion in AMC and WAKE. Waiting isn't necessary in the SLEEP TCS, since votes are only being removed in this case. Resources can be safely disabled asynchronously in parallel with the rest of the power collapse sequence. This reduces the sleep entry latency. Signed-off-by: Mike Tipton --- drivers/interconnect/qcom/bcm-voter.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/interconnect/qcom/bcm-voter.c b/drivers/interconnect/qcom/bcm-voter.c index e9f66f5c8a91..bb83ce7554b7 100644 --- a/drivers/interconnect/qcom/bcm-voter.c +++ b/drivers/interconnect/qcom/bcm-voter.c @@ -345,7 +345,7 @@ static int qcom_icc_bcm_voter_probe(struct platform_device *pdev) voter->np = np; if (of_property_read_u32(np, "qcom,tcs-wait", &voter->tcs_wait)) - voter->tcs_wait = QCOM_ICC_TAG_ALWAYS; + voter->tcs_wait = QCOM_ICC_TAG_ACTIVE_ONLY; mutex_init(&voter->lock); INIT_LIST_HEAD(&voter->commit_list); From patchwork Tue Jun 23 04:08:13 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Tipton X-Patchwork-Id: 11619727 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 929B6138C for ; Tue, 23 Jun 2020 04:09:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 74FD92083E for ; Tue, 23 Jun 2020 04:09:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="NeUfqTpw" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732361AbgFWEJQ (ORCPT ); Tue, 23 Jun 2020 00:09:16 -0400 Received: from mail29.static.mailgun.info ([104.130.122.29]:32689 "EHLO mail29.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732230AbgFWEI6 (ORCPT ); Tue, 23 Jun 2020 00:08:58 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1592885337; h=Content-Transfer-Encoding: MIME-Version: References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=Sd4NzcJtimoRSr2CyJHyFEljlaFfuHbcu+YA4Khlm68=; b=NeUfqTpwQSU1i3aGWy0WYlEKz+Lh1cyuqWUDc+M2WaBZW7dBhtjVaL4B++tFG5UDrnd9nW8d C72uAGFPKs9tt/YWUw8zP4rJpOg7JF+HzkHfy33sUnSi7KJ/lsCRSqjQXN+vtSQS8O/eli7z 7q5dyUwLdBnzkNbfdO8kEjaEqp0= X-Mailgun-Sending-Ip: 104.130.122.29 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n11.prod.us-east-1.postgun.com with SMTP id 5ef18040c4bb4f886dce0301 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Tue, 23 Jun 2020 04:08:32 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 37A0DC433C8; Tue, 23 Jun 2020 04:08:31 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mdtipton-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: mdtipton) by smtp.codeaurora.org (Postfix) with ESMTPSA id 8C465C43395; Tue, 23 Jun 2020 04:08:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 8C465C43395 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=mdtipton@codeaurora.org From: Mike Tipton To: georgi.djakov@linaro.org Cc: bjorn.andersson@linaro.org, agross@kernel.org, linux-pm@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, Mike Tipton Subject: [PATCH 3/4] interconnect: qcom: Add support for per-BCM scaling factors Date: Mon, 22 Jun 2020 21:08:13 -0700 Message-Id: <20200623040814.23791-4-mdtipton@codeaurora.org> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20200623040814.23791-1-mdtipton@codeaurora.org> References: <20200623040814.23791-1-mdtipton@codeaurora.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 Currently, bcm-voter always assumes requests are made in KBps and that BCM HW always wants them in Bps, so it always scales the requests by 1000. However, certain use cases and BCMs may use different units. Thus, add support for BCM-specific scaling factors. Signed-off-by: Mike Tipton --- drivers/interconnect/qcom/bcm-voter.c | 4 ++-- drivers/interconnect/qcom/icc-rpmh.c | 3 +++ drivers/interconnect/qcom/icc-rpmh.h | 2 ++ 3 files changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/interconnect/qcom/bcm-voter.c b/drivers/interconnect/qcom/bcm-voter.c index bb83ce7554b7..a68c858ca6b7 100644 --- a/drivers/interconnect/qcom/bcm-voter.c +++ b/drivers/interconnect/qcom/bcm-voter.c @@ -72,11 +72,11 @@ static void bcm_aggregate(struct qcom_icc_bcm *bcm) agg_peak[bucket] = max(agg_peak[bucket], temp); } - temp = agg_avg[bucket] * 1000ULL; + temp = agg_avg[bucket] * bcm->vote_scale; do_div(temp, bcm->aux_data.unit); bcm->vote_x[bucket] = temp; - temp = agg_peak[bucket] * 1000ULL; + temp = agg_peak[bucket] * bcm->vote_scale; do_div(temp, bcm->aux_data.unit); bcm->vote_y[bucket] = temp; } diff --git a/drivers/interconnect/qcom/icc-rpmh.c b/drivers/interconnect/qcom/icc-rpmh.c index 3ac5182c9ab2..008846c17bec 100644 --- a/drivers/interconnect/qcom/icc-rpmh.c +++ b/drivers/interconnect/qcom/icc-rpmh.c @@ -136,6 +136,9 @@ int qcom_icc_bcm_init(struct qcom_icc_bcm *bcm, struct device *dev) INIT_LIST_HEAD(&bcm->list); INIT_LIST_HEAD(&bcm->ws_list); + if (!bcm->vote_scale) + bcm->vote_scale = 1000; + /* Link Qnodes to their respective BCMs */ for (i = 0; i < bcm->num_nodes; i++) { qn = bcm->nodes[i]; diff --git a/drivers/interconnect/qcom/icc-rpmh.h b/drivers/interconnect/qcom/icc-rpmh.h index 903d25e61984..200e98be5926 100644 --- a/drivers/interconnect/qcom/icc-rpmh.h +++ b/drivers/interconnect/qcom/icc-rpmh.h @@ -94,6 +94,7 @@ struct qcom_icc_node { * @addr: address offsets used when voting to RPMH * @vote_x: aggregated threshold values, represents sum_bw when @type is bw bcm * @vote_y: aggregated threshold values, represents peak_bw when @type is bw bcm + * @vote_scale: scaling factor for vote_x and vote_y * @dirty: flag used to indicate whether the bcm needs to be committed * @keepalive: flag used to indicate whether a keepalive is required * @aux_data: auxiliary data used when calculating threshold values and @@ -109,6 +110,7 @@ struct qcom_icc_bcm { u32 addr; u64 vote_x[QCOM_ICC_NUM_BUCKETS]; u64 vote_y[QCOM_ICC_NUM_BUCKETS]; + u64 vote_scale; bool dirty; bool keepalive; struct bcm_db aux_data; From patchwork Tue Jun 23 04:08:14 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Tipton X-Patchwork-Id: 11619719 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7852413B1 for ; Tue, 23 Jun 2020 04:08:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5DCCB20780 for ; Tue, 23 Jun 2020 04:08:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="raO3prS5" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732197AbgFWEI5 (ORCPT ); Tue, 23 Jun 2020 00:08:57 -0400 Received: from m43-7.mailgun.net ([69.72.43.7]:50845 "EHLO m43-7.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732044AbgFWEI4 (ORCPT ); Tue, 23 Jun 2020 00:08:56 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1592885335; h=Content-Transfer-Encoding: MIME-Version: References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=IARNoExwd9tKeod/PEcdNAzRsZO98vGy2+NXI+vE9dA=; b=raO3prS52hcsb+n0u9gY73UBCjrwh9uyfe7P6sIvZgBtIc+g7TFBNT6I3y8ngoyGqb/ZBi/f jytv8kvAAp5qObH8kVOSPVwZdr/b26jtmJG9hQp0cXUIv4Kx1SLBiJ5dYZL+VNfKLHOd+Opa XahYU83w+tJiK8uQtv770Tz6xyA= X-Mailgun-Sending-Ip: 69.72.43.7 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n11.prod.us-east-1.postgun.com with SMTP id 5ef18040c76a4e7a2abdab2a (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Tue, 23 Jun 2020 04:08:32 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id AEBFDC43391; Tue, 23 Jun 2020 04:08:31 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE, URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mdtipton-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: mdtipton) by smtp.codeaurora.org (Postfix) with ESMTPSA id 0BB2EC433AD; Tue, 23 Jun 2020 04:08:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 0BB2EC433AD 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=mdtipton@codeaurora.org From: Mike Tipton To: georgi.djakov@linaro.org Cc: bjorn.andersson@linaro.org, agross@kernel.org, linux-pm@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, Mike Tipton Subject: [PATCH 4/4] interconnect: qcom: Fix small BW votes being truncated to zero Date: Mon, 22 Jun 2020 21:08:14 -0700 Message-Id: <20200623040814.23791-5-mdtipton@codeaurora.org> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20200623040814.23791-1-mdtipton@codeaurora.org> References: <20200623040814.23791-1-mdtipton@codeaurora.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 Small BW votes that translate to less than a single BCM unit are currently truncated to zero. Ensure that non-zero BW requests always result in at least a vote of 1 to BCM. Fixes: 976daac4a1c5 ("interconnect: qcom: Consolidate interconnect RPMh support") Signed-off-by: Mike Tipton Reported-by: kernel test robot --- drivers/interconnect/qcom/bcm-voter.c | 27 +++++++++++++++++++-------- 1 file changed, 19 insertions(+), 8 deletions(-) diff --git a/drivers/interconnect/qcom/bcm-voter.c b/drivers/interconnect/qcom/bcm-voter.c index a68c858ca6b7..9e2612fe7fad 100644 --- a/drivers/interconnect/qcom/bcm-voter.c +++ b/drivers/interconnect/qcom/bcm-voter.c @@ -54,8 +54,20 @@ static int cmp_vcd(void *priv, struct list_head *a, struct list_head *b) return 1; } +static u64 bcm_div(u64 num, u64 base) +{ + /* Ensure that small votes aren't lost. */ + if (num && num < base) + return 1; + + do_div(num, base); + + return num; +} + static void bcm_aggregate(struct qcom_icc_bcm *bcm) { + struct qcom_icc_node *node; size_t i, bucket; u64 agg_avg[QCOM_ICC_NUM_BUCKETS] = {0}; u64 agg_peak[QCOM_ICC_NUM_BUCKETS] = {0}; @@ -63,22 +75,21 @@ static void bcm_aggregate(struct qcom_icc_bcm *bcm) for (bucket = 0; bucket < QCOM_ICC_NUM_BUCKETS; bucket++) { for (i = 0; i < bcm->num_nodes; i++) { - temp = bcm->nodes[i]->sum_avg[bucket] * bcm->aux_data.width; - do_div(temp, bcm->nodes[i]->buswidth * bcm->nodes[i]->channels); + node = bcm->nodes[i]; + temp = bcm_div(node->sum_avg[bucket] * bcm->aux_data.width, + node->buswidth * node->channels); agg_avg[bucket] = max(agg_avg[bucket], temp); - temp = bcm->nodes[i]->max_peak[bucket] * bcm->aux_data.width; - do_div(temp, bcm->nodes[i]->buswidth); + temp = bcm_div(node->max_peak[bucket] * bcm->aux_data.width, + node->buswidth); agg_peak[bucket] = max(agg_peak[bucket], temp); } temp = agg_avg[bucket] * bcm->vote_scale; - do_div(temp, bcm->aux_data.unit); - bcm->vote_x[bucket] = temp; + bcm->vote_x[bucket] = bcm_div(temp, bcm->aux_data.unit); temp = agg_peak[bucket] * bcm->vote_scale; - do_div(temp, bcm->aux_data.unit); - bcm->vote_y[bucket] = temp; + bcm->vote_y[bucket] = bcm_div(temp, bcm->aux_data.unit); } if (bcm->keepalive && bcm->vote_x[QCOM_ICC_BUCKET_AMC] == 0 &&