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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D5C49CD6E45 for ; Wed, 27 May 2026 22:15:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:Cc:To:From: Subject:Message-ID:References:Mime-Version:In-Reply-To:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=daz08EfrJ4p/ZHyn7R6Z/1LWdy6ghXZSAUnbV6ql+LU=; b=qp8DTUrnYjnmxW4dgZFmyCNHJ+ 3Vl6usLEFw7/r6jz/FQMpqx66nQ1uWqnaKPWfg/B8qJw+C15BSrKqhnze8lnp5t28DmqbraeQvSwE 2p4OjZOrtEkX7PCHpdwBiQTTzM9Cl977JgsMijw25AYtjB3g8Hbt+A5N/eap836kc2dFeGgAQI56t 20mPQlTcB3+706g9w8/rLgqt7CiwvC2Y3RjbPtYGUDvEZVs2ybdL34QpnQAJ1wdMoOciWspbSaRaZ kyGZKOMpGvxqz+fRkcMkHKmKgZcSIwvZ9PHYHy1jps1rrZ6EL4KPdI8UpJK6ukN8+gOsRN+AIjJAj b6qMmDCA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wSMWd-00000004mka-1YCs; Wed, 27 May 2026 22:14:55 +0000 Received: from mail-pl1-x649.google.com ([2607:f8b0:4864:20::649]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wSMWJ-00000004mUS-07Gz for linux-arm-kernel@lists.infradead.org; Wed, 27 May 2026 22:14:36 +0000 Received: by mail-pl1-x649.google.com with SMTP id d9443c01a7336-2ba718173d1so72587725ad.0 for ; Wed, 27 May 2026 15:14:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1779920074; x=1780524874; darn=lists.infradead.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=daz08EfrJ4p/ZHyn7R6Z/1LWdy6ghXZSAUnbV6ql+LU=; b=hX7MG8qM8m2Sn1kcPhS247sOKcI94ruvErso4+/PFikCYqI32BQ7CW3g5M1i3Jm0o/ MgTQXbt3ZmOBa4j96KTAehrFXNpquiifQSIOD6PjtDJMMUDvEkTBXJyKLBfg0Y+oGHvG vl29QPx75tHhpXEOIHyURLKWzVJv8Qtb8HGXvCegPP1lQRQOLxT8Y24yy9f9865BAc64 joZvb50YBnqER5P8MXLcbRaNmlg5KU9pZJJgRY4ydlz1q2ayr8tzWMYR23ObsYX6j8EO I9u4RbqSKYchEpxCFE1Fwqqdg5FRF15hpw3E15/Wyn7qE+H6WvxOo8mU+niC8JgpGrT2 VTTw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1779920074; x=1780524874; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=daz08EfrJ4p/ZHyn7R6Z/1LWdy6ghXZSAUnbV6ql+LU=; b=D4uTYveTax1StP18UEgUPnDhAvVN51VO3TWaZ0sFb0hUPAEMEAPcLTO5ze1pNfI4cT b5rm6wC2iNJZNdxeOPnzepgifkoLLi5ddlOsW+Kpo7FT6QxrRDx5aOmhYYzOg8DqH2LE xwUJDo9tCF0BA/jofgdJeiGKeCsRPsmG203GacVp2//ImktKcB5VCQMMZ/fko6lC12lc qU/188Brtyg/J/5GkNO9pNnxU/fRCy4wITUusDOltAiGvLIfo9IWh5+tug80pVeNQxZq uh7YjOSNI+nAU/uNNstvAuqxqcpe0J0iCpXaupPhjzViUXF0CjtWdHaPHitkq0QWQsvD Xyfg== X-Forwarded-Encrypted: i=1; AFNElJ/ipVS3UVpKpfC9X3Enrv7lrvrNRWmKt4R8sFjgEBb+3UPMreFxZhaLkyktq57ELwbMw5y51WOwO6f3i87mLOHt@lists.infradead.org X-Gm-Message-State: AOJu0Yx6hsSd+89xP7zPXDKoBzWh/r53IHUmszZ2so+fZ99/17GyM6v5 3SqVwMCXGtTpjk6qwwNZPZgSfbmaBecfTWXGTVfvlxzgyJgb9FwEj/19iY/FbkzfRhwUFIvvGoF FKg== X-Received: from plpe3.prod.google.com ([2002:a17:903:3c23:b0:2bf:106:cced]) (user=praan job=prod-delivery.src-stubby-dispatcher) by 2002:a17:903:1a2b:b0:2bd:ef12:14d6 with SMTP id d9443c01a7336-2beb06cfc33mr275251325ad.34.1779920073336; Wed, 27 May 2026 15:14:33 -0700 (PDT) Date: Wed, 27 May 2026 22:14:05 +0000 In-Reply-To: <20260527221407.1756491-1-praan@google.com> Mime-Version: 1.0 References: <20260527221407.1756491-1-praan@google.com> X-Mailer: git-send-email 2.54.0.794.g4f17f83d09-goog Message-ID: <20260527221407.1756491-10-praan@google.com> Subject: [PATCH v7 09/11] iommu/arm-smmu-v3: Enable pm_runtime and setup devlinks From: Pranjal Shrivastava To: iommu@lists.linux.dev Cc: Will Deacon , Joerg Roedel , Robin Murphy , Jason Gunthorpe , Mostafa Saleh , Nicolin Chen , Daniel Mentz , Ashish Mhetre , linux-arm-kernel@lists.infradead.org, Pranjal Shrivastava Content-Type: text/plain; charset="UTF-8" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260527_151435_066762_CA961574 X-CRM114-Status: GOOD ( 12.51 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Enable PM runtime for SMMUs having a power-domain during smmu probe. Add a devlink between the clients and SMMU device. The absence of a power domain effectively disables runtime power management. Reviewed-by: Mostafa Saleh Signed-off-by: Pranjal Shrivastava --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index 6cbb1724b377..34e249656ab4 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -4240,6 +4240,9 @@ static struct iommu_device *arm_smmu_probe_device(struct device *dev) pci_prepare_ats(to_pci_dev(dev), stu); } + device_link_add(dev, smmu->dev, + DL_FLAG_PM_RUNTIME | DL_FLAG_AUTOREMOVE_SUPPLIER); + return &smmu->iommu; err_free_master: @@ -5592,11 +5595,18 @@ static int arm_smmu_device_probe(struct platform_device *pdev) if (ret) goto err_disable; + if (dev->pm_domain) { + pm_runtime_set_active(dev); + pm_runtime_use_autosuspend(dev); + pm_runtime_set_autosuspend_delay(dev, RPM_AUTOSUSPEND_DELAY_MS); + pm_runtime_enable(dev); + } + /* And we're up. Go go go! */ ret = iommu_device_sysfs_add(&smmu->iommu, dev, NULL, "smmu3.%pa", &ioaddr); if (ret) - goto err_disable; + goto err_rpm_disable; ret = iommu_device_register(&smmu->iommu, &arm_smmu_ops, dev); if (ret) { @@ -5608,6 +5618,8 @@ static int arm_smmu_device_probe(struct platform_device *pdev) err_free_sysfs: iommu_device_sysfs_remove(&smmu->iommu); +err_rpm_disable: + pm_runtime_disable(dev); err_disable: arm_smmu_device_disable(smmu); err_free_iopf: -- 2.54.0.794.g4f17f83d09-goog