From patchwork Wed Apr 3 08:07:06 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Philipp Stanner X-Patchwork-Id: 13615299 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 088A6CD128D for ; Wed, 3 Apr 2024 08:07:47 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id C69C9112579; Wed, 3 Apr 2024 08:07:40 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.b="NM5hScZr"; dkim-atps=neutral Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0314E112796 for ; Wed, 3 Apr 2024 08:07:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1712131657; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=KMdbSBwdbBKBdkE06cPmCOrD9+7wz7G2A47emsXg9D8=; b=NM5hScZru/cX3KUODs7cZBAd3CmowsR59CxRmEYMC+H+VVUgVT+kOweLPXT7er1L2KaGzr vA+8DhSCTMPoOOSPPqDrqW1CevVFyDulAut6jTPA4LkC7ux4gf/JeyG4+fUBodGWWDmxWX gMtmTi1aJ3qg3jnYRRxmvv+gQnTglck= Received: from mail-lj1-f199.google.com (mail-lj1-f199.google.com [209.85.208.199]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-9-GBPiitpXM02fWJr9YhMPYA-1; Wed, 03 Apr 2024 04:07:33 -0400 X-MC-Unique: GBPiitpXM02fWJr9YhMPYA-1 Received: by mail-lj1-f199.google.com with SMTP id 38308e7fff4ca-2d344e352f1so8874301fa.1 for ; Wed, 03 Apr 2024 01:07:33 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712131652; x=1712736452; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=KMdbSBwdbBKBdkE06cPmCOrD9+7wz7G2A47emsXg9D8=; b=YyEFPRRsypThN9NLmRcl2jVBzH6f7klrn2KOyl4aSdmEQu8Zu7YLW2oV7L9+6sLsCR Tw+fIgp6BXfEfdNyvGmpk9DqZvS+hrifWXWS9vjjNe30g8EqpkSkpNCahet732Pk0dHA OARQPqQnz35jqLFBUBLHLGqfp/3TfCuH/LFklfmn13PtEpezh8dZaoU4emGmPwtQNJGk AK6w3JernpyYQu0MMx/Hj3p9vY4RfE5W9vt9IAzJcKr6BJdCWWMxxp0dBVbPMOmw+qTW D6pdmkxlHkvgevpWT56LX8G0ut0W/PX1Jvk2ho6EM2+hN4w3ta0VEMTB90r1ueMPaj/+ MjbA== X-Gm-Message-State: AOJu0Yz4CBWXWZQ17EOCK5qknwuFhBvQ25Ku6BO52Vek4V5AeH70Xi4y F1/bRya5teF+vmaZIZ8DXbOnFGVkyhsH2M+vIRmAaOkjsLwuvrDhSMrTnMr+eZW9dVN38+iHEon Uv+QYx/S6Yo711g81LVU6y6X5l7v/7Ocjx08fps4AnPDaIqCCVG3Kbkt64c7/VxJjaA== X-Received: by 2002:a2e:a30b:0:b0:2d4:7f17:185d with SMTP id l11-20020a2ea30b000000b002d47f17185dmr8036424lje.0.1712131652223; Wed, 03 Apr 2024 01:07:32 -0700 (PDT) X-Google-Smtp-Source: AGHT+IE9ZKJGDq33FEBegelSh+aW2RNhstu69B5Bp3FcmKj9z5wrufQ/wWrxjzl1ABxOamDyWxbX4Q== X-Received: by 2002:a2e:a30b:0:b0:2d4:7f17:185d with SMTP id l11-20020a2ea30b000000b002d47f17185dmr8036412lje.0.1712131651855; Wed, 03 Apr 2024 01:07:31 -0700 (PDT) Received: from pstanner-thinkpadt14sgen1.muc.redhat.com (nat-pool-muc-t.redhat.com. [149.14.88.26]) by smtp.gmail.com with ESMTPSA id fa14-20020a05600c518e00b004159df274d5sm5504535wmb.6.2024.04.03.01.07.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Apr 2024 01:07:31 -0700 (PDT) From: Philipp Stanner To: Hans de Goede , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , Bjorn Helgaas , Sam Ravnborg , dakr@redhat.com Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, Philipp Stanner Subject: [PATCH v5 05/10] PCI: Move dev-enabled status bit to struct pci_dev Date: Wed, 3 Apr 2024 10:07:06 +0200 Message-ID: <20240403080712.13986-8-pstanner@redhat.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240403080712.13986-2-pstanner@redhat.com> References: <20240403080712.13986-2-pstanner@redhat.com> MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" The bit describing whether the PCI device is currently enabled is stored in struct pci_devres. Besides this struct being subject of a cleanup process, struct pci_device is in general the right place to store this information, since it is not devres-specific. Move the 'enabled' boolean bit to struct pci_dev. Signed-off-by: Philipp Stanner --- drivers/pci/devres.c | 11 ++++------- drivers/pci/pci.c | 17 ++++++++++------- drivers/pci/pci.h | 1 - include/linux/pci.h | 1 + 4 files changed, 15 insertions(+), 15 deletions(-) diff --git a/drivers/pci/devres.c b/drivers/pci/devres.c index 03662760d629..6bf93c6cbb66 100644 --- a/drivers/pci/devres.c +++ b/drivers/pci/devres.c @@ -403,7 +403,7 @@ static void pcim_release(struct device *gendev, void *res) if (this->restore_intx) pci_intx(dev, this->orig_intx); - if (this->enabled && !this->pinned) + if (!this->pinned) pci_disable_device(dev); } @@ -446,14 +446,11 @@ int pcim_enable_device(struct pci_dev *pdev) dr = get_pci_dr(pdev); if (unlikely(!dr)) return -ENOMEM; - if (dr->enabled) - return 0; rc = pci_enable_device(pdev); - if (!rc) { + if (!rc) pdev->is_managed = 1; - dr->enabled = 1; - } + return rc; } EXPORT_SYMBOL(pcim_enable_device); @@ -471,7 +468,7 @@ void pcim_pin_device(struct pci_dev *pdev) struct pci_devres *dr; dr = find_pci_dr(pdev); - WARN_ON(!dr || !dr->enabled); + WARN_ON(!dr || !pdev->enabled); if (dr) dr->pinned = 1; } diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index c0c1ee17a06b..9f1419bac9b9 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -2011,6 +2011,9 @@ static int do_pci_enable_device(struct pci_dev *dev, int bars) u16 cmd; u8 pin; + if (dev->enabled) + return 0; + err = pci_set_power_state(dev, PCI_D0); if (err < 0 && err != -EIO) return err; @@ -2025,7 +2028,7 @@ static int do_pci_enable_device(struct pci_dev *dev, int bars) pci_fixup_device(pci_fixup_enable, dev); if (dev->msi_enabled || dev->msix_enabled) - return 0; + goto success_out; pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin); if (pin) { @@ -2035,6 +2038,8 @@ static int do_pci_enable_device(struct pci_dev *dev, int bars) cmd & ~PCI_COMMAND_INTX_DISABLE); } +success_out: + dev->enabled = true; return 0; } @@ -2193,6 +2198,9 @@ static void do_pci_disable_device(struct pci_dev *dev) { u16 pci_command; + if (!dev->enabled) + return; + pci_read_config_word(dev, PCI_COMMAND, &pci_command); if (pci_command & PCI_COMMAND_MASTER) { pci_command &= ~PCI_COMMAND_MASTER; @@ -2200,6 +2208,7 @@ static void do_pci_disable_device(struct pci_dev *dev) } pcibios_disable_device(dev); + dev->enabled = false; } /** @@ -2227,12 +2236,6 @@ void pci_disable_enabled_device(struct pci_dev *dev) */ void pci_disable_device(struct pci_dev *dev) { - struct pci_devres *dr; - - dr = find_pci_dr(dev); - if (dr) - dr->enabled = 0; - dev_WARN_ONCE(&dev->dev, atomic_read(&dev->enable_cnt) <= 0, "disabling already-disabled device"); diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 040ed2825554..2b6c0df133bf 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -823,7 +823,6 @@ static inline pci_power_t mid_pci_get_power_state(struct pci_dev *pdev) * then remove them from here. */ struct pci_devres { - unsigned int enabled:1; unsigned int pinned:1; unsigned int orig_intx:1; unsigned int restore_intx:1; diff --git a/include/linux/pci.h b/include/linux/pci.h index 0f203338f820..95cdd1bc73c4 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -367,6 +367,7 @@ struct pci_dev { this is D0-D3, D0 being fully functional, and D3 being off. */ u8 pm_cap; /* PM capability offset */ + unsigned int enabled:1; /* Whether this dev is enabled */ unsigned int imm_ready:1; /* Supports Immediate Readiness */ unsigned int pme_support:5; /* Bitmask of states from which PME# can be generated */