From patchwork Sat Sep 18 13:26:08 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Rafael J. Wysocki" X-Patchwork-Id: 12503841 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 X-Spam-Level: X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C3A09C433EF for ; Sat, 18 Sep 2021 13:29:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A489F6128A for ; Sat, 18 Sep 2021 13:29:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237466AbhIRNa7 (ORCPT ); Sat, 18 Sep 2021 09:30:59 -0400 Received: from cloudserver094114.home.pl ([79.96.170.134]:57356 "EHLO cloudserver094114.home.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237235AbhIRNa6 (ORCPT ); Sat, 18 Sep 2021 09:30:58 -0400 Received: from localhost (127.0.0.1) (HELO v370.home.net.pl) by /usr/run/smtp (/usr/run/postfix/private/idea_relay_lmtp) via UNIX with SMTP (IdeaSmtpServer 3.0.0) id 58508a8780607b0b; Sat, 18 Sep 2021 15:29:33 +0200 Received: from kreacher.localnet (89-77-51-84.dynamic.chello.pl [89.77.51.84]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by v370.home.net.pl (Postfix) with ESMTPSA id 60AD466A51F; Sat, 18 Sep 2021 15:29:32 +0200 (CEST) From: "Rafael J. Wysocki" To: Linux ACPI , Linux PCI Cc: LKML , Bjorn Helgaas , Andy Shevchenko , Mika Westerberg , x86 Maintainers Subject: [PATCH v1 4/5] PCI: PM: Make pci_choose_state() call pci_target_state() Date: Sat, 18 Sep 2021 15:26:08 +0200 Message-ID: <3566670.MHq7AAxBmi@kreacher> In-Reply-To: <8003272.NyiUUSuA9g@kreacher> References: <8003272.NyiUUSuA9g@kreacher> MIME-Version: 1.0 X-CLIENT-IP: 89.77.51.84 X-CLIENT-HOSTNAME: 89-77-51-84.dynamic.chello.pl X-VADE-SPAMSTATE: spam:low X-VADE-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgedvtddrudehkedgiedvucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecujffqoffgrffnpdggtffipffknecuuegrihhlohhuthemucduhedtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenogfuphgrmhfkphculdeftddtmdenucfjughrpefhvffufffkjghfggfgtgesthfuredttddtjeenucfhrhhomhepfdftrghfrggvlhculfdrucghhihsohgtkhhifdcuoehrjhifsehrjhifhihsohgtkhhirdhnvghtqeenucggtffrrghtthgvrhhnpedvjeelgffhiedukedtleekkedvudfggefhgfegjefgueekjeelvefggfdvledutdenucfkphepkeelrdejjedrhedurdekgeenucfuphgrmhfkphepkeelrdejjedrhedurdekgeenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepihhnvghtpeekledrjeejrdehuddrkeegpdhhvghlohepkhhrvggrtghhvghrrdhlohgtrghlnhgvthdpmhgrihhlfhhrohhmpedftfgrfhgrvghlucflrdcuhgihshhotghkihdfuceorhhjfiesrhhjfiihshhotghkihdrnhgvtheqpdhrtghpthhtoheplhhinhhugidqrggtphhisehvghgvrhdrkhgvrhhnvghlrdhorhhgpdhrtghpthhtoheplhhinhhugidqphgtihesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehlihhnuhigqdhkvghrnhgvlhesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehhvghlghgrrghssehkvghr nhgvlhdrohhrghdprhgtphhtthhopegrnhgurhhihidrshhhvghvtghhvghnkhhosehlihhnuhigrdhinhhtvghlrdgtohhmpdhrtghpthhtohepmhhikhgrrdifvghsthgvrhgsvghrgheslhhinhhugidrihhnthgvlhdrtghomhdprhgtphhtthhopeigkeeisehkvghrnhgvlhdrohhrgh X-DCC--Metrics: v370.home.net.pl 1024; Body=14 Fuz1=14 Fuz2=14 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Rafael J. Wysocki The pci_choose_state() and pci_target_state() implementations are somewhat divergent without a good reason, because they are used for similar purposes. Change the pci_choose_state() implementation to use pci_target_state() internally except for transitions to the working state of the system in which case it is expected to return D0. Signed-off-by: Rafael J. Wysocki --- drivers/pci/pci-acpi.c | 3 -- drivers/pci/pci.c | 54 ++++++++++++++----------------------------------- 2 files changed, 16 insertions(+), 41 deletions(-) Index: linux-pm/drivers/pci/pci.c =================================================================== --- linux-pm.orig/drivers/pci/pci.c +++ linux-pm/drivers/pci/pci.c @@ -1331,44 +1331,6 @@ int pci_set_power_state(struct pci_dev * } EXPORT_SYMBOL(pci_set_power_state); -/** - * pci_choose_state - Choose the power state of a PCI device - * @dev: PCI device to be suspended - * @state: target sleep state for the whole system. This is the value - * that is passed to suspend() function. - * - * Returns PCI power state suitable for given device and given system - * message. - */ -pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state) -{ - pci_power_t ret; - - if (!dev->pm_cap) - return PCI_D0; - - ret = acpi_pci_choose_state(dev); - if (ret != PCI_POWER_ERROR) - return ret; - - switch (state.event) { - case PM_EVENT_ON: - return PCI_D0; - case PM_EVENT_FREEZE: - case PM_EVENT_PRETHAW: - /* REVISIT both freeze and pre-thaw "should" use D0 */ - case PM_EVENT_SUSPEND: - case PM_EVENT_HIBERNATE: - return PCI_D3hot; - default: - pci_info(dev, "unrecognized suspend event %d\n", - state.event); - BUG(); - } - return PCI_D0; -} -EXPORT_SYMBOL(pci_choose_state); - #define PCI_EXP_SAVE_REGS 7 static struct pci_cap_saved_state *_pci_find_saved_cap(struct pci_dev *pci_dev, @@ -2782,6 +2744,22 @@ void pci_dev_complete_resume(struct pci_ spin_unlock_irq(&dev->power.lock); } +/** + * pci_choose_state - Choose the power state for a PCI device. + * @pci_dev: Target PCI device. + * @state: Target state for the whole system. + * + * Returns PCI power state suitable for @pci_dev and @state. + */ +pci_power_t pci_choose_state(struct pci_dev *pci_dev, pm_message_t state) +{ + if (state.event == PM_EVENT_ON) + return PCI_D0; + + return pci_target_state(pci_dev, device_may_wakeup(&pci_dev->dev)); +} +EXPORT_SYMBOL(pci_choose_state); + void pci_config_pm_runtime_get(struct pci_dev *pdev) { struct device *dev = &pdev->dev; Index: linux-pm/drivers/pci/pci-acpi.c =================================================================== --- linux-pm.orig/drivers/pci/pci-acpi.c +++ linux-pm/drivers/pci/pci-acpi.c @@ -910,9 +910,6 @@ pci_power_t acpi_pci_choose_state(struct { int acpi_state, d_max; - if (acpi_pci_disabled) - return PCI_POWER_ERROR; - if (pdev->no_d3cold) d_max = ACPI_STATE_D3_HOT; else