From patchwork Tue Apr 24 00:20:16 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bjorn Andersson X-Patchwork-Id: 10358405 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 67EFE6038F for ; Tue, 24 Apr 2018 00:20:58 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 577DC28C9B for ; Tue, 24 Apr 2018 00:20:58 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4C05428CA3; Tue, 24 Apr 2018 00:20:58 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id F0D6428C9B for ; Tue, 24 Apr 2018 00:20:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932661AbeDXAUl (ORCPT ); Mon, 23 Apr 2018 20:20:41 -0400 Received: from mail-pf0-f196.google.com ([209.85.192.196]:37191 "EHLO mail-pf0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932647AbeDXAUX (ORCPT ); Mon, 23 Apr 2018 20:20:23 -0400 Received: by mail-pf0-f196.google.com with SMTP id p6so10684813pfn.4 for ; Mon, 23 Apr 2018 17:20:23 -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; bh=DSTbjfoz0kdQ/9LRJEh/g5udoe4jmqRYzjyUp1Wr9s4=; b=SwCP9z+tzdy9lk/cKHgYaYVujerGgji5mO8bIu2azCWgU+jUU4Y/Y91TSE1cZJttkW MzexYFLlQr6jcD5Fg64kmobYlUQVJX2lUV0pMXhKNny86y//a3kfYrIKaG9A1lI0xN1a Xy3kWBLOTW/dClIDUP72593eJxUl5v5cs2bbg= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=DSTbjfoz0kdQ/9LRJEh/g5udoe4jmqRYzjyUp1Wr9s4=; b=HhJcgxhdixlvscN9RH55n1lxtEP5K8GmAUpMGIB9bVmFJJvLPqAt7JjMAbFd51u+5u qu5d463ousotmwxXllTFGIiCndUxPN+w3YmRFWAdXzAmtlmP8EwVC1CmBBq2oJFhwKZA v0DWGT3qRCbXk9F9Mkp/VH14kuY6WffCmqSjEdLAp3UfHGMPNdJXBVKCzQyzwh6KXtlF n8if117pNn01yLUrSG85Yb69ItI+K+pyM+nARVKzFc1yk4Q3CZFtMp7Z7iSVQcjy+9Us uIG4gub8Lm3+RtGJtH2SGMYcUnSdVRo5Vl8OUfjuY7hTBpw8MC3ZE+MWq6oJbGVRy1Ql Ff8w== X-Gm-Message-State: ALQs6tA8k1IRoWktakKOtdi5qbpQGPH5oKc//f77YuREGmiLB4sBM7b1 j5DoFUzNsEht1SzZZcJ5oSp01g== X-Google-Smtp-Source: AIpwx49YG5ZOAFZTpm22DxH/GLDtDpTDiBh4sgSTAX526Z/Q3L8gzGmBp2aLB7FTWNw5g/vqqdVWWQ== X-Received: by 2002:a17:902:8342:: with SMTP id z2-v6mr22323951pln.311.1524529223164; Mon, 23 Apr 2018 17:20:23 -0700 (PDT) Received: from localhost.localdomain (104-188-17-28.lightspeed.sndgca.sbcglobal.net. [104.188.17.28]) by smtp.gmail.com with ESMTPSA id p6sm26669845pfk.104.2018.04.23.17.20.22 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 23 Apr 2018 17:20:22 -0700 (PDT) From: Bjorn Andersson To: Vinayak Holikatti , "James E.J. Bottomley" , "Martin K. Petersen" Cc: MyungJoo Ham , Kyungmin Park , Chanwoo Choi , linux-scsi@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, Vivek Gautam Subject: [PATCH 3/3] scsi: ufs: Use freq table with devfreq Date: Mon, 23 Apr 2018 17:20:16 -0700 Message-Id: <20180424002016.9205-4-bjorn.andersson@linaro.org> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180424002016.9205-1-bjorn.andersson@linaro.org> References: <20180424002016.9205-1-bjorn.andersson@linaro.org> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP devfreq requires that the client operates on actual frequencies, not only 0 and UMAX_INT and as such UFS brok with the introduction of f1d981eaecf8 ("PM / devfreq: Use the available min/max frequency"). This patch registers the frequencies of the first clock with devfreq and use these to determine if we're trying to step up or down. Signed-off-by: Bjorn Andersson Reviewed-by: Subhash Jadavani --- drivers/scsi/ufs/ufshcd.c | 39 ++++++++++++++++++++++++++++++++------- 1 file changed, 32 insertions(+), 7 deletions(-) diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 2253f24309ec..07b1f3c7bd2d 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -1168,16 +1168,13 @@ static int ufshcd_devfreq_target(struct device *dev, struct ufs_hba *hba = dev_get_drvdata(dev); ktime_t start; bool scale_up, sched_clk_scaling_suspend_work = false; + struct list_head *clk_list = &hba->clk_list_head; + struct ufs_clk_info *clki; unsigned long irq_flags; if (!ufshcd_is_clkscaling_supported(hba)) return -EINVAL; - if ((*freq > 0) && (*freq < UINT_MAX)) { - dev_err(hba->dev, "%s: invalid freq = %lu\n", __func__, *freq); - return -EINVAL; - } - spin_lock_irqsave(hba->host->host_lock, irq_flags); if (ufshcd_eh_in_progress(hba)) { spin_unlock_irqrestore(hba->host->host_lock, irq_flags); @@ -1187,7 +1184,13 @@ static int ufshcd_devfreq_target(struct device *dev, if (!hba->clk_scaling.active_reqs) sched_clk_scaling_suspend_work = true; - scale_up = (*freq == UINT_MAX) ? true : false; + if (list_empty(clk_list)) { + spin_unlock_irqrestore(hba->host->host_lock, irq_flags); + goto out; + } + + clki = list_first_entry(&hba->clk_list_head, struct ufs_clk_info, list); + scale_up = (*freq == clki->max_freq) ? true : false; if (!ufshcd_is_devfreq_scaling_required(hba, scale_up)) { spin_unlock_irqrestore(hba->host->host_lock, irq_flags); ret = 0; @@ -1257,11 +1260,33 @@ static struct devfreq_dev_profile ufs_devfreq_profile = { static int ufshcd_devfreq_init(struct ufs_hba *hba) { + struct devfreq_dev_profile *profile; + struct list_head *clk_list = &hba->clk_list_head; + struct ufs_clk_info *clki; struct devfreq *devfreq; int ret; + /* Skip devfreq if we don't have any clocks in the list */ + if (list_empty(clk_list)) + return 0; + + profile = devm_kmemdup(hba->dev, &ufs_devfreq_profile, + sizeof(ufs_devfreq_profile), GFP_KERNEL); + if (!profile) + return -ENOMEM; + + profile->max_state = 2; + profile->freq_table = devm_kcalloc(hba->dev, profile->max_state, + sizeof(unsigned long), GFP_KERNEL); + if (!profile->freq_table) + return -ENOMEM; + + clki = list_first_entry(&hba->clk_list_head, struct ufs_clk_info, list); + profile->freq_table[0] = clki->min_freq; + profile->freq_table[1] = clki->max_freq; + devfreq = devm_devfreq_add_device(hba->dev, - &ufs_devfreq_profile, + profile, "simple_ondemand", NULL); if (IS_ERR(devfreq)) {