From patchwork Wed Dec 8 19:33:03 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bjorn Helgaas X-Patchwork-Id: 12665167 X-Patchwork-Delegate: bhelgaas@google.com 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 93FC1C4332F for ; Wed, 8 Dec 2021 19:33:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239616AbhLHThC (ORCPT ); Wed, 8 Dec 2021 14:37:02 -0500 Received: from sin.source.kernel.org ([145.40.73.55]:40222 "EHLO sin.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239619AbhLHTgz (ORCPT ); Wed, 8 Dec 2021 14:36:55 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sin.source.kernel.org (Postfix) with ESMTPS id 320E1CE2337; Wed, 8 Dec 2021 19:33:22 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1B7D7C341C7; Wed, 8 Dec 2021 19:33:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1638992000; bh=nOoqjNV9s//XwN0iRkPsYCk6HiPgVgpB8FkLXH6zPKo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ByWisZpVHDM0n7jIKjTe1HpZmZrp6wUl3xMNabqSFvx3jtoIWfQ0wj9pS5gOH69NE 7cERxV0CHmmp/zgFU/cyAA7Ty09F+guhVHMNXKKf12tvmZUyVIqRnfAtFU7/rRyNmT MWgtN8XuA5zo0sOnaSY/8WfPJVpGviHvEqZJGHaXKpayCA/brU+/nnBE4hNkw60MMz MUgpd06bnCUn6aFjj6lc4KRtaglYhWhel3qC6D7xYTwX7U2JSp4f7YsdoiAtWv0jXx bC6WuHLc1kb8c09zVWvuENeWgPuAByZFbp53Tl+SvjaqqFVNK/kVNh5eT98euKBOOh m5y+Sag2w1AzQ== From: Bjorn Helgaas To: David Airlie Cc: Vaibhav Gupta , Vaibhav Gupta , "Rafael J . Wysocki" , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kernel-mentees@lists.linuxfoundation.org, Shuah Khan , Bjorn Helgaas Subject: [PATCH v3 1/3] amd64-agp: convert to generic power management Date: Wed, 8 Dec 2021 13:33:03 -0600 Message-Id: <20211208193305.147072-2-helgaas@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211208193305.147072-1-helgaas@kernel.org> References: <20211208193305.147072-1-helgaas@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Vaibhav Gupta Convert amd64-agp from legacy PCI power management to the generic power management framework. Previously, amd64-agp used legacy PCI power management, and agp_amd64_suspend() and agp_amd64_resume() were responsible for both device-specific things and generic PCI things: agp_amd64_suspend pci_save_state(pdev) <-- generic PCI pci_set_power_state(pdev, pci_choose_state(pdev, state)) <-- generic PCI agp_amd64_resume pci_set_power_state(pdev, PCI_D0) <-- generic PCI pci_restore_state(pdev) <-- generic PCI nforce3_agp_init() <-- device-specific amd_8151_configure() <-- device-specific With generic power management, the PCI bus PM methods do the generic PCI things, and the driver needs only the device-specific part, i.e., suspend_devices_and_enter dpm_suspend_start(PMSG_SUSPEND) pci_pm_suspend # PCI bus .suspend() method agp_amd64_suspend <-- not needed at all; removed suspend_enter dpm_suspend_noirq(PMSG_SUSPEND) pci_pm_suspend_noirq # PCI bus .suspend_noirq() method pci_save_state <-- generic PCI pci_prepare_to_sleep <-- generic PCI pci_set_power_state ... dpm_resume_end(PMSG_RESUME) pci_pm_resume # PCI bus .resume() method pci_restore_standard_config pci_set_power_state(PCI_D0) <-- generic PCI pci_restore_state <-- generic PCI agp_amd64_resume # dev->driver->pm->resume nforce3_agp_init() <-- device-specific amd_8151_configure() <-- device-specific [bhelgaas: commit log] Signed-off-by: Vaibhav Gupta Signed-off-by: Bjorn Helgaas --- drivers/char/agp/amd64-agp.c | 24 ++++++------------------ 1 file changed, 6 insertions(+), 18 deletions(-) diff --git a/drivers/char/agp/amd64-agp.c b/drivers/char/agp/amd64-agp.c index b40edae32817..dc78a4fb879e 100644 --- a/drivers/char/agp/amd64-agp.c +++ b/drivers/char/agp/amd64-agp.c @@ -588,20 +588,11 @@ static void agp_amd64_remove(struct pci_dev *pdev) agp_bridges_found--; } -#ifdef CONFIG_PM +#define agp_amd64_suspend NULL -static int agp_amd64_suspend(struct pci_dev *pdev, pm_message_t state) +static int __maybe_unused agp_amd64_resume(struct device *dev) { - pci_save_state(pdev); - pci_set_power_state(pdev, pci_choose_state(pdev, state)); - - return 0; -} - -static int agp_amd64_resume(struct pci_dev *pdev) -{ - pci_set_power_state(pdev, PCI_D0); - pci_restore_state(pdev); + struct pci_dev *pdev = to_pci_dev(dev); if (pdev->vendor == PCI_VENDOR_ID_NVIDIA) nforce3_agp_init(pdev); @@ -609,8 +600,6 @@ static int agp_amd64_resume(struct pci_dev *pdev) return amd_8151_configure(); } -#endif /* CONFIG_PM */ - static const struct pci_device_id agp_amd64_pci_table[] = { { .class = (PCI_CLASS_BRIDGE_HOST << 8), @@ -738,15 +727,14 @@ static const struct pci_device_id agp_amd64_pci_promisc_table[] = { { } }; +static SIMPLE_DEV_PM_OPS(agp_amd64_pm_ops, agp_amd64_suspend, agp_amd64_resume); + static struct pci_driver agp_amd64_pci_driver = { .name = "agpgart-amd64", .id_table = agp_amd64_pci_table, .probe = agp_amd64_probe, .remove = agp_amd64_remove, -#ifdef CONFIG_PM - .suspend = agp_amd64_suspend, - .resume = agp_amd64_resume, -#endif + .driver.pm = &agp_amd64_pm_ops, };