From patchwork Fri Jan 19 11:43:41 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vivek Gautam X-Patchwork-Id: 10175539 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 F26DA60392 for ; Fri, 19 Jan 2018 15:12:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EE1A728691 for ; Fri, 19 Jan 2018 15:12:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E29CD286B8; Fri, 19 Jan 2018 15:12:01 +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=-4.1 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED,T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 1152A28695 for ; Fri, 19 Jan 2018 15:12:00 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 7753F6E99C; Fri, 19 Jan 2018 15:11:26 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from smtp.codeaurora.org (smtp.codeaurora.org [198.145.29.96]) by gabe.freedesktop.org (Postfix) with ESMTPS id 9D4FD6E919; Fri, 19 Jan 2018 11:44:20 +0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 4B79060712; Fri, 19 Jan 2018 11:44:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1516362260; bh=14jovbnBbknaQ0ZU//xUTPbrfBDDsnSFLJ92aCyf/rs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lyt6dKRBYO8wrqN0vA+nMG/gNIjU1VosTwGFJ7Bn8oOgTgNy32uGh1obZFZXZsKqc zRAk3iKhiGfc4CLZhRqEl7PKv4+LZQOr9nRYdpIVk6clCdXS1xQRPfGhPgud96l1PP Y2HJ9ZK5CaRrhTHwvCoECiegAeF3AS9YkeqNdslc= Received: from blr-ubuntu-41.ap.qualcomm.com (blr-bdr-fw-01_globalnat_allzones-outside.qualcomm.com [103.229.18.19]) (using TLSv1.1 with cipher ECDHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: vivek.gautam@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id DCC6760452; Fri, 19 Jan 2018 11:44:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1516362260; bh=14jovbnBbknaQ0ZU//xUTPbrfBDDsnSFLJ92aCyf/rs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lyt6dKRBYO8wrqN0vA+nMG/gNIjU1VosTwGFJ7Bn8oOgTgNy32uGh1obZFZXZsKqc zRAk3iKhiGfc4CLZhRqEl7PKv4+LZQOr9nRYdpIVk6clCdXS1xQRPfGhPgud96l1PP Y2HJ9ZK5CaRrhTHwvCoECiegAeF3AS9YkeqNdslc= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org DCC6760452 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: alex.williamson@redhat.com, robh+dt@kernel.org, mark.rutland@arm.com, rjw@rjwysocki.net, robin.murphy@arm.com, will.deacon@arm.com, iommu@lists.linux-foundation.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, sboyd@codeaurora.org Subject: [PATCH v6 4/6] iommu/arm-smmu: Add the device_link between masters and smmu Date: Fri, 19 Jan 2018 17:13:41 +0530 Message-Id: <1516362223-22946-5-git-send-email-vivek.gautam@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1516362223-22946-1-git-send-email-vivek.gautam@codeaurora.org> References: <1516362223-22946-1-git-send-email-vivek.gautam@codeaurora.org> X-Mailman-Approved-At: Fri, 19 Jan 2018 15:11:16 +0000 Cc: gregkh@linuxfoundation.org, vivek.gautam@codeaurora.org, linux-arm-msm@vger.kernel.org, sricharan@codeaurora.org, m.szyprowski@samsung.com X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP 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 --- drivers/iommu/arm-smmu.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index 95478bfb182c..33bbcfedb896 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -1367,6 +1367,7 @@ static int arm_smmu_add_device(struct device *dev) struct arm_smmu_device *smmu; struct arm_smmu_master_cfg *cfg; struct iommu_fwspec *fwspec = dev->iommu_fwspec; + struct device_link *link; int i, ret; if (using_legacy_binding) { @@ -1428,6 +1429,16 @@ static int arm_smmu_add_device(struct device *dev) pm_runtime_put_sync(smmu->dev); + /* + * Establish the link between smmu and master, so that the + * smmu gets runtime enabled/disabled as per the master's + * needs. + */ + link = device_link_add(dev, smmu->dev, DL_FLAG_PM_RUNTIME); + if (!link) + dev_warn(smmu->dev, "Unable to create device link between %s and %s\n", + dev_name(smmu->dev), dev_name(dev)); + return 0; out_cfg_free: