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 X-Spam-Level: X-Spam-Status: No, score=-2.6 required=3.0 tests=DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,T_DKIM_INVALID, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C9561C6778A for ; Sun, 8 Jul 2018 17:34:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8155C20890 for ; Sun, 8 Jul 2018 17:34:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="hy42urMI"; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="Idl/7upH" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8155C20890 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932878AbeGHRes (ORCPT ); Sun, 8 Jul 2018 13:34:48 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:60128 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754335AbeGHRep (ORCPT ); Sun, 8 Jul 2018 13:34:45 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 14C9F60B3C; Sun, 8 Jul 2018 17:34:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1531071285; bh=R1gcNArpy3wnZXhn8mZNzbM83k4i6alX2IgmXFcenZk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hy42urMIc18V0AroUWzVcBZ+8S1doLuu6TyYai6U+u2MJIxaBdGznNH6MZCvlImuW tJbZ9VIRJB23GKIBjrWRfoBHbJw2RytbdD0vfCQDtqXQeD1UyF43zYIi0UKIkF2tex KNZRPNYK5wyQpCS5BsiBqNwtB8g/P+Nc+i8o7490= Received: from blr-ubuntu-41.ap.qualcomm.com (blr-bdr-fw-01_globalnat_allzones-outside.qualcomm.com [103.229.18.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: vivek.gautam@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 32AC1607DC; Sun, 8 Jul 2018 17:34:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1531071283; bh=R1gcNArpy3wnZXhn8mZNzbM83k4i6alX2IgmXFcenZk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Idl/7upH90ExDN5ynBmZnpeuuxGcfe/T3CwNUT1ni/VK7RmvyRSLwBDRo0kUJFRkX Ao/MIIsdDKxvBVZbbhqKnM71zi6O6f1n6Th2qMR3GEyZMMQ0nt7JThHyXOTSwaRe06 +qHL3S0TvEEg625LVAEUWQt21xR8AwaSStlrLxLI= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 32AC1607DC Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=vivek.gautam@codeaurora.org From: Vivek Gautam To: joro@8bytes.org, robh+dt@kernel.org, mark.rutland@arm.com, robin.murphy@arm.com, will.deacon@arm.com, iommu@lists.linux-foundation.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: alex.williamson@redhat.com, rjw@rjwysocki.net, robdclark@gmail.com, linux-pm@vger.kernel.org, freedreno@lists.freedesktop.org, sboyd@kernel.org, tfiga@chromium.org, sricharan@codeaurora.org, m.szyprowski@samsung.com, architt@codeaurora.org, linux-arm-msm@vger.kernel.org, jcrouse@codeaurora.org, vivek.gautam@codeaurora.org, Lukas Wunner Subject: [PATCH v12 3/4] iommu/arm-smmu: Add the device_link between masters and smmu Date: Sun, 8 Jul 2018 23:04:12 +0530 Message-Id: <20180708173413.1965-4-vivek.gautam@codeaurora.org> X-Mailer: git-send-email 2.16.1.72.g5be1f00a9a70 In-Reply-To: <20180708173413.1965-1-vivek.gautam@codeaurora.org> References: <20180708173413.1965-1-vivek.gautam@codeaurora.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Sricharan R Finally add the device link between the master device and smmu, so that the smmu gets runtime enabled/disabled only when the master needs it. This is done from add_device callback which gets called once when the master is added to the smmu. Signed-off-by: Sricharan R Signed-off-by: Vivek Gautam Reviewed-by: Tomasz Figa Cc: Rafael J. Wysocki Cc: Lukas Wunner --- - Change since v11 * Replaced DL_FLAG_AUTOREMOVE flag with DL_FLAG_AUTOREMOVE_SUPPLIER. drivers/iommu/arm-smmu.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index 09265e206e2d..916cde4954d2 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -1461,8 +1461,20 @@ static int arm_smmu_add_device(struct device *dev) iommu_device_link(&smmu->iommu, dev); + if (pm_runtime_enabled(smmu->dev) && + !device_link_add(dev, smmu->dev, + DL_FLAG_PM_RUNTIME | DL_FLAG_AUTOREMOVE_SUPPLIER)) { + dev_err(smmu->dev, "Unable to add link to the consumer %s\n", + dev_name(dev)); + ret = -ENODEV; + goto out_unlink; + } + return 0; +out_unlink: + iommu_device_unlink(&smmu->iommu, dev); + arm_smmu_master_free_smes(fwspec); out_cfg_free: kfree(cfg); out_free: -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation