From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f73.google.com (mail-pj1-f73.google.com [209.85.216.73]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2096433B6CC for ; Mon, 26 Jan 2026 15:12:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.73 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769440342; cv=none; b=pQ81/eMFsswuyXiZXgfwiEw7ob/hQLkFI1vfuEmIW2jFJ/KV7ECtIQlLd3b1JDm36VBY8XsxLNZPasEYpOs+IGY+wpNCQVYVTLkegQYFNGGexAbuKwxb/D+vZCcrUkYdDLA0Uugj8we7B1R1fZasf6fa1rnGbS2bni83VPH/oH4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769440342; c=relaxed/simple; bh=md7tN995OKUmQPuu/CDylIYO6Gx2uix2sVsCm6/qWCY=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=grQfCaEf6P8ue+BrPpTL6m+ZB8jVVErnZjA42AvCQEblqAe1BHWACkIKNtmL9JpR4SQ3mx1ND1rM0yjm5ObF9gqghHfJvmWt3PExJAx/v/RDa9zXZ03QnfWOkPlTR9d2rLTjG/5NC3TACg38Hrjmo4A7nytsoqggdjsT5GAwMtQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--praan.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=Qo6xvbiE; arc=none smtp.client-ip=209.85.216.73 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--praan.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="Qo6xvbiE" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-34ac819b2f2so4050763a91.0 for ; Mon, 26 Jan 2026 07:12:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1769440340; x=1770045140; darn=lists.linux.dev; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=M5O2APTy7OkzFnnsUuG3lkfKPnAJvqbOHUIhbuHe9/Q=; b=Qo6xvbiEqX6fQF2nyNn6I+mcymSRBXetHIKS7WrJJCwahN80SfXA02AdYxUif0jWVa KLVwnVkUH/5q1a/jLT+y6lj47o5Fdr8Duk3NcJktVdNgSPTqmlyfrcaPJi7/AKU1BlAy MumYGWjvt5kAGwKzDkACq8XxCb6+thHRtvgjBn+IQXXSyRxRECE4nbIaGUCStgJKe+UK APc/mgbk/RA7J2uxETNkSTgs5c97+TB7WRB5nJNUC7ecU8LNh4ffhWMYj3redsPQP6wa A8t8r3ITNv6BMClHhYv+UhuCSlx7x4TNmcXNZBk/zd6+lyy1JQtdvRu0LNSZDfF83xxi 2E0Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1769440340; x=1770045140; 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=M5O2APTy7OkzFnnsUuG3lkfKPnAJvqbOHUIhbuHe9/Q=; b=ogTG659PGchyMpiT6uqzDf2jpzP4d1Horeabcrc0qYw1O6KIa+bFcOU7drT5bpYbDi xWur8XGv1w/wUM/2tskVRNN64X3na9D9Kihgp5jfEz1YuG2s//i9ZoccRhVj19xZSnfu p31whrWEFQh54mS5279I+VsSGTuLglf4Ztq1Fnve3thqqbVTpRHukuSsww9ZXT3rH4ae XLw0b4UCMcVO5CZT2jYbVp0e/SBWUe25i5kBpcDbyQ2MFB67H4vCVL0mOLRsK4I55TVA o8mZIihbCH6kFRP2Hn+RtyZ1C89xMlFGonHufcDfzfUqyaub/x+RLn/BjJ0EFjYxPNxj BS4Q== X-Gm-Message-State: AOJu0Yw0N54mVuStruR9Rww8xpdbhrW11gKo38QJYoqVpumySSbdxQFX JXBb7CU1ddFKFYjXr3gH1P1+PxFt6fKXviO0KkqgjVNu/gH0u7Y+dSNjNr+pRcRfYz3WD9kCiy1 Sqq8ODQxbxAeuH6Qqf9FsZrofPrTegBvIEYJ7QPIKBwCliOSE7JbhmWvjOav9M6kMrvdV8+HFn4 cQxk6Q3TSPvTgEfCiseu4aLYdCqVibMg== X-Received: from pjbtb5.prod.google.com ([2002:a17:90b:53c5:b0:34c:d9a0:3bf6]) (user=praan job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:3848:b0:349:3fe6:ab8b with SMTP id 98e67ed59e1d1-353c41accb2mr4109172a91.36.1769440340300; Mon, 26 Jan 2026 07:12:20 -0800 (PST) Date: Mon, 26 Jan 2026 15:11:56 +0000 In-Reply-To: <20260126151157.3418145-1-praan@google.com> Precedence: bulk X-Mailing-List: iommu@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260126151157.3418145-1-praan@google.com> X-Mailer: git-send-email 2.52.0.457.g6b5491de43-goog Message-ID: <20260126151157.3418145-10-praan@google.com> Subject: [PATCH v5 09/10] 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 , Sairaj Kodilkar , Pranjal Shrivastava Content-Type: text/plain; charset="UTF-8" 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 22782025d0f0..9931dde41239 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -3752,6 +3752,9 @@ 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: @@ -5079,11 +5082,18 @@ 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) { @@ -5095,6 +5105,8 @@ 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: -- 2.52.0.457.g6b5491de43-goog