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 X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 2EA3DC7659A for ; Thu, 27 Feb 2020 14:29:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0166C24656 for ; Thu, 27 Feb 2020 14:29:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582813757; bh=1+PH6IMGsNVCZMF5qZrfTQPg6A7KXplQfrrGAEMyieg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=e58ZwWlGtHJm/BW1R71n8EVYHkteb01s7pXtfQ27gDSeBHWnbl7/P7w2fcQHXICol PymzK4SzpoiOuWt6XiJunJSa0wQ4omCOjh3HKCqZDp07U5+POT2Eqy10scitFTvqmB eBqKm/m+CxjIsvsl6Ufbq55esZjMpasECxor3bnI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387963AbgB0OGi (ORCPT ); Thu, 27 Feb 2020 09:06:38 -0500 Received: from mail.kernel.org ([198.145.29.99]:43734 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387940AbgB0OGa (ORCPT ); Thu, 27 Feb 2020 09:06:30 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id C1E7520578; Thu, 27 Feb 2020 14:06:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582812389; bh=1+PH6IMGsNVCZMF5qZrfTQPg6A7KXplQfrrGAEMyieg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zGZ0auMCDaXhLtNehFOeKwNrvfbUL+zzL3jORa0oWHPta+17q8c/YzMYF07M4qL3j UQ4iqXaffp4g9M2Ye7hy0Lmq1thTd6i/tPLafDZIF7OrYW7NtVLc6HbIomRvBI5YSg JuLd0HySczx9PpSN8qN92PKnxrxCFUm5US+dI/2Y= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Prabhakar Kushwaha , Jens Axboe Subject: [PATCH 4.19 95/97] ata: ahci: Add shutdown to freeze hardware resources of ahci Date: Thu, 27 Feb 2020 14:37:43 +0100 Message-Id: <20200227132230.195272711@linuxfoundation.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200227132214.553656188@linuxfoundation.org> References: <20200227132214.553656188@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Prabhakar Kushwaha commit 10a663a1b15134a5a714aa515e11425a44d4fdf7 upstream. device_shutdown() called from reboot or power_shutdown expect all devices to be shutdown. Same is true for even ahci pci driver. As no ahci shutdown function is implemented, the ata subsystem always remains alive with DMA & interrupt support. File system related calls should not be honored after device_shutdown(). So defining ahci pci driver shutdown to freeze hardware (mask interrupt, stop DMA engine and free DMA resources). Signed-off-by: Prabhakar Kushwaha Signed-off-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman --- drivers/ata/ahci.c | 7 +++++++ drivers/ata/libata-core.c | 21 +++++++++++++++++++++ include/linux/libata.h | 1 + 3 files changed, 29 insertions(+) --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -96,6 +96,7 @@ enum board_ids { static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); static void ahci_remove_one(struct pci_dev *dev); +static void ahci_shutdown_one(struct pci_dev *dev); static int ahci_vt8251_hardreset(struct ata_link *link, unsigned int *class, unsigned long deadline); static int ahci_avn_hardreset(struct ata_link *link, unsigned int *class, @@ -609,6 +610,7 @@ static struct pci_driver ahci_pci_driver .id_table = ahci_pci_tbl, .probe = ahci_init_one, .remove = ahci_remove_one, + .shutdown = ahci_shutdown_one, .driver = { .pm = &ahci_pci_pm_ops, }, @@ -1897,6 +1899,11 @@ static int ahci_init_one(struct pci_dev return 0; } +static void ahci_shutdown_one(struct pci_dev *pdev) +{ + ata_pci_shutdown_one(pdev); +} + static void ahci_remove_one(struct pci_dev *pdev) { pm_runtime_get_noresume(&pdev->dev); --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -6780,6 +6780,26 @@ void ata_pci_remove_one(struct pci_dev * ata_host_detach(host); } +void ata_pci_shutdown_one(struct pci_dev *pdev) +{ + struct ata_host *host = pci_get_drvdata(pdev); + int i; + + for (i = 0; i < host->n_ports; i++) { + struct ata_port *ap = host->ports[i]; + + ap->pflags |= ATA_PFLAG_FROZEN; + + /* Disable port interrupts */ + if (ap->ops->freeze) + ap->ops->freeze(ap); + + /* Stop the port DMA engines */ + if (ap->ops->port_stop) + ap->ops->port_stop(ap); + } +} + /* move to PCI subsystem */ int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits) { @@ -7400,6 +7420,7 @@ EXPORT_SYMBOL_GPL(ata_timing_cycle2mode) #ifdef CONFIG_PCI EXPORT_SYMBOL_GPL(pci_test_config_bits); +EXPORT_SYMBOL_GPL(ata_pci_shutdown_one); EXPORT_SYMBOL_GPL(ata_pci_remove_one); #ifdef CONFIG_PM EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend); --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -1236,6 +1236,7 @@ struct pci_bits { }; extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits); +extern void ata_pci_shutdown_one(struct pci_dev *pdev); extern void ata_pci_remove_one(struct pci_dev *pdev); #ifdef CONFIG_PM