From patchwork Wed Sep 27 14:18:06 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 728013 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 037EBE80AB1 for ; Wed, 27 Sep 2023 14:18:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232094AbjI0OSf (ORCPT ); Wed, 27 Sep 2023 10:18:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59878 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232011AbjI0OSd (ORCPT ); Wed, 27 Sep 2023 10:18:33 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EF4FDF9; Wed, 27 Sep 2023 07:18:32 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3E49AC433C9; Wed, 27 Sep 2023 14:18:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695824312; bh=TdYao4qTrR7cQFg+fTNLMuMLao4Qjs08k5wl3GDngQk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uHL3Q8VOymr58o8NWwsgW9pVFAEDUWqbO4MQ+aG7n+hqxU3UHzaqcCUJ8NfFe4RTZ m2P9G5alhuV+hLUlqfKl4KxGKA8yJNjssn+jt/PrHMxs4rnjwUt4a+YvZycngJGV2a uteXGr3Vh/cxeV0xWEwB6dxm+w5HXQlBEVF/0GfAgLepCG5sbva820lNmRlcDm1Le4 acmevT8k1HT/KnoEwQELCIlavWRxht7F9thWHqHewHKhEKXbgvcWDk95ZDccFPVCbu DHa4k3nq2gw3MuJV2AFz3g4o8zACcXyBmj7W7dSee0b2aNhxK+1wgT038Vk04BvWVr tIYt5dbbjKFvw== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v8 01/23] ata: libata-core: Fix ata_port_request_pm() locking Date: Wed, 27 Sep 2023 23:18:06 +0900 Message-ID: <20230927141828.90288-2-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230927141828.90288-1-dlemoal@kernel.org> References: <20230927141828.90288-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org The function ata_port_request_pm() checks the port flag ATA_PFLAG_PM_PENDING and calls ata_port_wait_eh() if this flag is set to ensure that power management operations for a port are not scheduled simultaneously. However, this flag check is done without holding the port lock. Fix this by taking the port lock on entry to the function and checking the flag under this lock. The lock is released and re-taken if ata_port_wait_eh() needs to be called. The two WARN_ON() macros checking that the ATA_PFLAG_PM_PENDING flag was cleared are removed as the first call is racy and the second one done without holding the port lock. Fixes: 5ef41082912b ("ata: add ata port system PM callbacks") Cc: stable@vger.kernel.org Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Tested-by: Chia-Lin Kao (AceLan) Reviewed-by: Niklas Cassel Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen Reviewed-by: Bart Van Assche --- drivers/ata/libata-core.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 0072e0f9ad39..732f3d0b4fd9 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -5037,17 +5037,19 @@ static void ata_port_request_pm(struct ata_port *ap, pm_message_t mesg, struct ata_link *link; unsigned long flags; - /* Previous resume operation might still be in - * progress. Wait for PM_PENDING to clear. + spin_lock_irqsave(ap->lock, flags); + + /* + * A previous PM operation might still be in progress. Wait for + * ATA_PFLAG_PM_PENDING to clear. */ if (ap->pflags & ATA_PFLAG_PM_PENDING) { + spin_unlock_irqrestore(ap->lock, flags); ata_port_wait_eh(ap); - WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); + spin_lock_irqsave(ap->lock, flags); } - /* request PM ops to EH */ - spin_lock_irqsave(ap->lock, flags); - + /* Request PM operation to EH */ ap->pm_mesg = mesg; ap->pflags |= ATA_PFLAG_PM_PENDING; ata_for_each_link(link, ap, HOST_FIRST) { @@ -5059,10 +5061,8 @@ static void ata_port_request_pm(struct ata_port *ap, pm_message_t mesg, spin_unlock_irqrestore(ap->lock, flags); - if (!async) { + if (!async) ata_port_wait_eh(ap); - WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING); - } } /* From patchwork Wed Sep 27 14:18:07 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 727000 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 30E5DE80AB0 for ; Wed, 27 Sep 2023 14:18:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232101AbjI0OSj (ORCPT ); Wed, 27 Sep 2023 10:18:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59884 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232096AbjI0OSf (ORCPT ); Wed, 27 Sep 2023 10:18:35 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A334AF3; Wed, 27 Sep 2023 07:18:34 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E6D29C433C8; Wed, 27 Sep 2023 14:18:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695824314; bh=iHRP9E9cPqufgIWxI2IH2yhDdyqES2Tr5fpai5AjM9Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=d3J9TWT+UIorePXJZS1yk9fZTHTMyOWV5vzwLYIAkEXgkiP/pycXP+li4x+L6OF+3 QME4qWxpEZyVqSShrXocdoTjbSar1YkaLUmEj2/39mg2olXbeUIzAIXQQ8mbzj2F1S FocJgG7PyVz4Xb4X3KEvRimT+GJssmg99s6SIn7S3JSnopBHqmwrNukOkfL7aA0XqD z4w/0dAHXXYaKD4Af1ZCoeEmyCXnQS40a/DflDoeoIq8KQkSTpNNjidO14Gmq9UPtm DWyeR2J83p29DY84v2Sv4qBtOWXIZpKG6n7zXm9mBLp3AwLOyYTdx0CboF5mkIIO+t jS25lCmJhEGjg== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v8 02/23] ata: libata-core: Fix port and device removal Date: Wed, 27 Sep 2023 23:18:07 +0900 Message-ID: <20230927141828.90288-3-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230927141828.90288-1-dlemoal@kernel.org> References: <20230927141828.90288-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Whenever an ATA adapter driver is removed (e.g. rmmod), ata_port_detach() is called repeatedly for all the adapter ports to remove (unload) the devices attached to the port and delete the port device itself. Removing of devices is done using libata EH with the ATA_PFLAG_UNLOADING port flag set. This causes libata EH to execute ata_eh_unload() which disables all devices attached to the port. ata_port_detach() finishes by calling scsi_remove_host() to remove the scsi host associated with the port. This function will trigger the removal of all scsi devices attached to the host and in the case of disks, calls to sd_shutdown() which will flush the device write cache and stop the device. However, given that the devices were already disabled by ata_eh_unload(), the synchronize write cache command and start stop unit commands fail. E.g. running "rmmod ahci" with first removing sd_mod results in error messages like: ata13.00: disable device sd 0:0:0:0: [sda] Synchronizing SCSI cache sd 0:0:0:0: [sda] Synchronize Cache(10) failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK sd 0:0:0:0: [sda] Stopping disk sd 0:0:0:0: [sda] Start/Stop Unit failed: Result: hostbyte=DID_BAD_TARGET driverbyte=DRIVER_OK Fix this by removing all scsi devices of the ata devices connected to the port before scheduling libata EH to disable the ATA devices. Fixes: 720ba12620ee ("[PATCH] libata-hp: update unload-unplug") Cc: stable@vger.kernel.org Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Reviewed-by: Niklas Cassel Tested-by: Chia-Lin Kao (AceLan) Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen --- drivers/ata/libata-core.c | 21 ++++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 732f3d0b4fd9..8e35afe5e560 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -5948,11 +5948,30 @@ static void ata_port_detach(struct ata_port *ap) struct ata_link *link; struct ata_device *dev; - /* tell EH we're leaving & flush EH */ + /* Wait for any ongoing EH */ + ata_port_wait_eh(ap); + + mutex_lock(&ap->scsi_scan_mutex); spin_lock_irqsave(ap->lock, flags); + + /* Remove scsi devices */ + ata_for_each_link(link, ap, HOST_FIRST) { + ata_for_each_dev(dev, link, ALL) { + if (dev->sdev) { + spin_unlock_irqrestore(ap->lock, flags); + scsi_remove_device(dev->sdev); + spin_lock_irqsave(ap->lock, flags); + dev->sdev = NULL; + } + } + } + + /* Tell EH to disable all devices */ ap->pflags |= ATA_PFLAG_UNLOADING; ata_port_schedule_eh(ap); + spin_unlock_irqrestore(ap->lock, flags); + mutex_unlock(&ap->scsi_scan_mutex); /* wait till EH commits suicide */ ata_port_wait_eh(ap); From patchwork Wed Sep 27 14:18:08 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 728012 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 F007DE80AB1 for ; Wed, 27 Sep 2023 14:18:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232106AbjI0OSk (ORCPT ); Wed, 27 Sep 2023 10:18:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48792 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232011AbjI0OSh (ORCPT ); Wed, 27 Sep 2023 10:18:37 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5B128FC; Wed, 27 Sep 2023 07:18:36 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9C6FBC433C7; Wed, 27 Sep 2023 14:18:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695824316; bh=6/gHyN2ekZWWjPRG6Y55Waf1Y/Wfg30IYpSFTS1WmfE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eXYzbgsAArvIoE4FFsELDrZwt/fzgED19S+YHwxS9k4IYFMRof467jjxVEGrMnL/Y hOO1337Gt5RZTD8vfQFclAtc+pySEdJAOkIDd7KUrelbhWjx2iOvt6tpU6Ymnnj3wY kgZ/URY1x/ZrpRYadYzHDaJ5pLP3dVFti2nx+DPquj/P8kO/hKEPdXWOszxu/1KB0v xvHmQRwtD4a9VyaJJ4YS7Jrl6DQigK+NG5DYJAF+w/IW1dkmX3Es+6CJNaJW82x1OH at+c14ZOYEkVQucikFNxRbJ/jU+vqE7kndUyJJ3lGomUddxUTb3fEQB8kQf0AZYF5g GMfn4ImoR4aRQ== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v8 03/23] ata: libata-scsi: link ata port and scsi device Date: Wed, 27 Sep 2023 23:18:08 +0900 Message-ID: <20230927141828.90288-4-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230927141828.90288-1-dlemoal@kernel.org> References: <20230927141828.90288-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org There is no direct device ancestry defined between an ata_device and its scsi device which prevents the power management code from correctly ordering suspend and resume operations. Create such ancestry with the ata device as the parent to ensure that the scsi device (child) is suspended before the ata device and that resume handles the ata device before the scsi device. The parent-child (supplier-consumer) relationship is established between the ata_port (parent) and the scsi device (child) with the function device_add_link(). The parent used is not the ata_device as the PM operations are defined per port and the status of all devices connected through that port is controlled from the port operations. The device link is established with the new function ata_scsi_slave_alloc(), and this function is used to define the ->slave_alloc callback of the scsi host template of all ata drivers. Fixes: a19a93e4c6a9 ("scsi: core: pm: Rely on the device driver core for async power management") Cc: stable@vger.kernel.org Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Reviewed-by: Niklas Cassel Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen Reviewed-by: John Garry --- drivers/ata/libata-scsi.c | 45 ++++++++++++++++++++++++++++++++++----- include/linux/libata.h | 2 ++ 2 files changed, 42 insertions(+), 5 deletions(-) diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index fb73c145b49a..8b43290ca2cd 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -1089,6 +1089,42 @@ int ata_scsi_dev_config(struct scsi_device *sdev, struct ata_device *dev) return 0; } +/** + * ata_scsi_slave_alloc - Early setup of SCSI device + * @sdev: SCSI device to examine + * + * This is called from scsi_alloc_sdev() when the scsi device + * associated with an ATA device is scanned on a port. + * + * LOCKING: + * Defined by SCSI layer. We don't really care. + */ + +int ata_scsi_slave_alloc(struct scsi_device *sdev) +{ + struct ata_port *ap = ata_shost_to_port(sdev->host); + struct device_link *link; + + ata_scsi_sdev_config(sdev); + + /* + * Create a link from the ata_port device to the scsi device to ensure + * that PM does suspend/resume in the correct order: the scsi device is + * consumer (child) and the ata port the supplier (parent). + */ + link = device_link_add(&sdev->sdev_gendev, &ap->tdev, + DL_FLAG_STATELESS | + DL_FLAG_PM_RUNTIME | DL_FLAG_RPM_ACTIVE); + if (!link) { + ata_port_err(ap, "Failed to create link to scsi device %s\n", + dev_name(&sdev->sdev_gendev)); + return -ENODEV; + } + + return 0; +} +EXPORT_SYMBOL_GPL(ata_scsi_slave_alloc); + /** * ata_scsi_slave_config - Set SCSI device attributes * @sdev: SCSI device to examine @@ -1105,14 +1141,11 @@ int ata_scsi_slave_config(struct scsi_device *sdev) { struct ata_port *ap = ata_shost_to_port(sdev->host); struct ata_device *dev = __ata_scsi_find_dev(ap, sdev); - int rc = 0; - - ata_scsi_sdev_config(sdev); if (dev) - rc = ata_scsi_dev_config(sdev, dev); + return ata_scsi_dev_config(sdev, dev); - return rc; + return 0; } EXPORT_SYMBOL_GPL(ata_scsi_slave_config); @@ -1136,6 +1169,8 @@ void ata_scsi_slave_destroy(struct scsi_device *sdev) unsigned long flags; struct ata_device *dev; + device_link_remove(&sdev->sdev_gendev, &ap->tdev); + spin_lock_irqsave(ap->lock, flags); dev = __ata_scsi_find_dev(ap, sdev); if (dev && dev->sdev) { diff --git a/include/linux/libata.h b/include/linux/libata.h index bf4913f4d7ac..4ece1b7a2a5b 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -1148,6 +1148,7 @@ extern int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int geom[]); extern void ata_scsi_unlock_native_capacity(struct scsi_device *sdev); +extern int ata_scsi_slave_alloc(struct scsi_device *sdev); extern int ata_scsi_slave_config(struct scsi_device *sdev); extern void ata_scsi_slave_destroy(struct scsi_device *sdev); extern int ata_scsi_change_queue_depth(struct scsi_device *sdev, @@ -1396,6 +1397,7 @@ extern const struct attribute_group *ata_common_sdev_groups[]; .this_id = ATA_SHT_THIS_ID, \ .emulated = ATA_SHT_EMULATED, \ .proc_name = drv_name, \ + .slave_alloc = ata_scsi_slave_alloc, \ .slave_destroy = ata_scsi_slave_destroy, \ .bios_param = ata_std_bios_param, \ .unlock_native_capacity = ata_scsi_unlock_native_capacity,\ From patchwork Wed Sep 27 14:18:09 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 726999 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 D1D11E80AB0 for ; Wed, 27 Sep 2023 14:18:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232124AbjI0OSq (ORCPT ); Wed, 27 Sep 2023 10:18:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48824 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232105AbjI0OSk (ORCPT ); Wed, 27 Sep 2023 10:18:40 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5DD78FC; Wed, 27 Sep 2023 07:18:38 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 51D6EC433C8; Wed, 27 Sep 2023 14:18:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695824318; bh=NuiEFKy2TaqTCoWMvtNze3V7cRoGP6fplZo2KulM11s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Mrx2QcR8mIqD1a0Fsc3CxGaEVB5ZRc3oFox24Ijltd97pj+vIj3d9TmRoi5Ap2Hdw 5FlRDvcVyFmSGggTol9M07tcNmbJWzVA5A5eqF6mHV2P8X35UJf4tbCwD2im0ylerS dxTeWWohWUD0ERFgrg93vhqDn8safgwM8uqthEJ7DTCm+wepTABeBqvfNm4qBGBrDC BaPG2ooLgPBlnx8jUX0RX4ckvCKmO/VrNfKe+7yNIKSpiDyZJdFxO2x7PMDk/LLDOU VmUZNxAnhSuMoGjHOhHN9Sbki/3yC1HxWSNOxOnocQ/Sth4nSuHcmYNFCOCBtLt2hM ayBapyooCc0nA== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v8 04/23] scsi: sd: Differentiate system and runtime start/stop management Date: Wed, 27 Sep 2023 23:18:09 +0900 Message-ID: <20230927141828.90288-5-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230927141828.90288-1-dlemoal@kernel.org> References: <20230927141828.90288-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org The underlying device and driver of a SCSI disk may have different system and runtime power mode control requirements. This is because runtime power management affects only the SCSI disk, while sustem level power management affects all devices, including the controller for the SCSI disk. For instance, issuing a START STOP UNIT command when a SCSI disk is runtime suspended and resumed is fine: the command is translated to a STANDBY IMMEDIATE command to spin down the ATA disk and to a VERIFY command to wake it up. The SCSI disk runtime operations have no effect on the ata port device used to connect the ATA disk. However, for system suspend/resume operations, the ATA port used to connect the device will also be suspended and resumed, with the resume operation requiring re-validating the device link and the device itself. In this case, issuing a VERIFY command to spinup the disk must be done before starting to revalidate the device, when the ata port is being resumed. In such case, we must not allow the SCSI disk driver to issue START STOP UNIT commands. Allow a low level driver to refine the SCSI disk start/stop management by differentiating system and runtime cases with two new SCSI device flags: manage_system_start_stop and manage_runtime_start_stop. These new flags replace the current manage_start_stop flag. Drivers setting the manage_start_stop are modifed to set both new flags, thus preserving the existing start/stop management behavior. For backward compatibility, the old manage_start_stop sysfs device attribute is kept as a read-only attribute showing a value of 1 for devices enabling both new flags and 0 otherwise. Fixes: 0a8589055936 ("ata,scsi: do not issue START STOP UNIT on resume") Cc: stable@vger.kernel.org Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen --- drivers/ata/libata-scsi.c | 3 +- drivers/firewire/sbp2.c | 9 ++-- drivers/scsi/sd.c | 90 ++++++++++++++++++++++++++++++-------- include/scsi/scsi_device.h | 5 ++- 4 files changed, 84 insertions(+), 23 deletions(-) diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 8b43290ca2cd..73428ad0c8d2 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -1056,7 +1056,8 @@ int ata_scsi_dev_config(struct scsi_device *sdev, struct ata_device *dev) * will be woken up by ata_port_pm_resume() with a port reset * and device revalidation. */ - sdev->manage_start_stop = 1; + sdev->manage_system_start_stop = true; + sdev->manage_runtime_start_stop = true; sdev->no_start_on_resume = 1; } diff --git a/drivers/firewire/sbp2.c b/drivers/firewire/sbp2.c index 26db5b8dfc1e..749868b9e80d 100644 --- a/drivers/firewire/sbp2.c +++ b/drivers/firewire/sbp2.c @@ -81,7 +81,8 @@ MODULE_PARM_DESC(exclusive_login, "Exclusive login to sbp2 device " * * - power condition * Set the power condition field in the START STOP UNIT commands sent by - * sd_mod on suspend, resume, and shutdown (if manage_start_stop is on). + * sd_mod on suspend, resume, and shutdown (if manage_system_start_stop or + * manage_runtime_start_stop is on). * Some disks need this to spin down or to resume properly. * * - override internal blacklist @@ -1517,8 +1518,10 @@ static int sbp2_scsi_slave_configure(struct scsi_device *sdev) sdev->use_10_for_rw = 1; - if (sbp2_param_exclusive_login) - sdev->manage_start_stop = 1; + if (sbp2_param_exclusive_login) { + sdev->manage_system_start_stop = true; + sdev->manage_runtime_start_stop = true; + } if (sdev->type == TYPE_ROM) sdev->use_10_for_ms = 1; diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index c92a317ba547..a1ef4eef904f 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -201,18 +201,32 @@ cache_type_store(struct device *dev, struct device_attribute *attr, } static ssize_t -manage_start_stop_show(struct device *dev, struct device_attribute *attr, - char *buf) +manage_start_stop_show(struct device *dev, + struct device_attribute *attr, char *buf) { struct scsi_disk *sdkp = to_scsi_disk(dev); struct scsi_device *sdp = sdkp->device; - return sprintf(buf, "%u\n", sdp->manage_start_stop); + return sprintf(buf, "%u\n", + sdp->manage_system_start_stop && + sdp->manage_runtime_start_stop); } +static DEVICE_ATTR_RO(manage_start_stop); static ssize_t -manage_start_stop_store(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) +manage_system_start_stop_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct scsi_disk *sdkp = to_scsi_disk(dev); + struct scsi_device *sdp = sdkp->device; + + return sprintf(buf, "%u\n", sdp->manage_system_start_stop); +} + +static ssize_t +manage_system_start_stop_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) { struct scsi_disk *sdkp = to_scsi_disk(dev); struct scsi_device *sdp = sdkp->device; @@ -224,11 +238,42 @@ manage_start_stop_store(struct device *dev, struct device_attribute *attr, if (kstrtobool(buf, &v)) return -EINVAL; - sdp->manage_start_stop = v; + sdp->manage_system_start_stop = v; return count; } -static DEVICE_ATTR_RW(manage_start_stop); +static DEVICE_ATTR_RW(manage_system_start_stop); + +static ssize_t +manage_runtime_start_stop_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct scsi_disk *sdkp = to_scsi_disk(dev); + struct scsi_device *sdp = sdkp->device; + + return sprintf(buf, "%u\n", sdp->manage_runtime_start_stop); +} + +static ssize_t +manage_runtime_start_stop_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct scsi_disk *sdkp = to_scsi_disk(dev); + struct scsi_device *sdp = sdkp->device; + bool v; + + if (!capable(CAP_SYS_ADMIN)) + return -EACCES; + + if (kstrtobool(buf, &v)) + return -EINVAL; + + sdp->manage_runtime_start_stop = v; + + return count; +} +static DEVICE_ATTR_RW(manage_runtime_start_stop); static ssize_t allow_restart_show(struct device *dev, struct device_attribute *attr, char *buf) @@ -560,6 +605,8 @@ static struct attribute *sd_disk_attrs[] = { &dev_attr_FUA.attr, &dev_attr_allow_restart.attr, &dev_attr_manage_start_stop.attr, + &dev_attr_manage_system_start_stop.attr, + &dev_attr_manage_runtime_start_stop.attr, &dev_attr_protection_type.attr, &dev_attr_protection_mode.attr, &dev_attr_app_tag_own.attr, @@ -3771,13 +3818,20 @@ static void sd_shutdown(struct device *dev) sd_sync_cache(sdkp, NULL); } - if (system_state != SYSTEM_RESTART && sdkp->device->manage_start_stop) { + if (system_state != SYSTEM_RESTART && + sdkp->device->manage_system_start_stop) { sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); sd_start_stop_device(sdkp, 0); } } -static int sd_suspend_common(struct device *dev, bool ignore_stop_errors) +static inline bool sd_do_start_stop(struct scsi_device *sdev, bool runtime) +{ + return (sdev->manage_system_start_stop && !runtime) || + (sdev->manage_runtime_start_stop && runtime); +} + +static int sd_suspend_common(struct device *dev, bool runtime) { struct scsi_disk *sdkp = dev_get_drvdata(dev); struct scsi_sense_hdr sshdr; @@ -3809,12 +3863,12 @@ static int sd_suspend_common(struct device *dev, bool ignore_stop_errors) } } - if (sdkp->device->manage_start_stop) { + if (sd_do_start_stop(sdkp->device, runtime)) { if (!sdkp->device->silence_suspend) sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n"); /* an error is not worth aborting a system sleep */ ret = sd_start_stop_device(sdkp, 0); - if (ignore_stop_errors) + if (!runtime) ret = 0; } @@ -3826,23 +3880,23 @@ static int sd_suspend_system(struct device *dev) if (pm_runtime_suspended(dev)) return 0; - return sd_suspend_common(dev, true); + return sd_suspend_common(dev, false); } static int sd_suspend_runtime(struct device *dev) { - return sd_suspend_common(dev, false); + return sd_suspend_common(dev, true); } -static int sd_resume(struct device *dev) +static int sd_resume(struct device *dev, bool runtime) { struct scsi_disk *sdkp = dev_get_drvdata(dev); - int ret = 0; + int ret; if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */ return 0; - if (!sdkp->device->manage_start_stop) + if (!sd_do_start_stop(sdkp->device, runtime)) return 0; if (!sdkp->device->no_start_on_resume) { @@ -3860,7 +3914,7 @@ static int sd_resume_system(struct device *dev) if (pm_runtime_suspended(dev)) return 0; - return sd_resume(dev); + return sd_resume(dev, false); } static int sd_resume_runtime(struct device *dev) @@ -3887,7 +3941,7 @@ static int sd_resume_runtime(struct device *dev) "Failed to clear sense data\n"); } - return sd_resume(dev); + return sd_resume(dev, true); } static const struct dev_pm_ops sd_pm_ops = { diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index b9230b6add04..fd41fdac0a8e 100644 --- a/include/scsi/scsi_device.h +++ b/include/scsi/scsi_device.h @@ -161,6 +161,10 @@ struct scsi_device { * pass settings from slave_alloc to scsi * core. */ unsigned int eh_timeout; /* Error handling timeout */ + + bool manage_system_start_stop; /* Let HLD (sd) manage system start/stop */ + bool manage_runtime_start_stop; /* Let HLD (sd) manage runtime start/stop */ + unsigned removable:1; unsigned changed:1; /* Data invalid due to media change */ unsigned busy:1; /* Used to prevent races */ @@ -193,7 +197,6 @@ struct scsi_device { unsigned use_192_bytes_for_3f:1; /* ask for 192 bytes from page 0x3f */ unsigned no_start_on_add:1; /* do not issue start on add */ unsigned allow_restart:1; /* issue START_UNIT in error handler */ - unsigned manage_start_stop:1; /* Let HLD (sd) manage start/stop */ unsigned no_start_on_resume:1; /* Do not issue START_STOP_UNIT on resume */ unsigned start_stop_pwr_cond:1; /* Set power cond. in START_STOP_UNIT */ unsigned no_uld_attach:1; /* disable connecting to upper level drivers */ From patchwork Wed Sep 27 14:18:10 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 726998 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 BF011E80AAD for ; Wed, 27 Sep 2023 14:19:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232103AbjI0OTA (ORCPT ); Wed, 27 Sep 2023 10:19:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48934 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232117AbjI0OSp (ORCPT ); Wed, 27 Sep 2023 10:18:45 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2E4CF19A; Wed, 27 Sep 2023 07:18:40 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 563EDC433C9; Wed, 27 Sep 2023 14:18:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695824319; bh=+YeUtQqTNusPLCOn7mqkt5RHcnPUcBci8LmjqI5Q9FU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kdORnP9QC0h2AjLAhUL5FNE7oOW9hcOWuC8G0eY3HBL/WxHVRD5Z6gXrTmofTQ8Cb nkmyMxjdFJuBLDq2qLVytbuer+hstl1ZysmVJv8oFSBLwuDdGovXXeveru9S72kdo9 5UMOoQlDjzuy2Vw1Qpe7kc/JTuNDBaC3TPM7F97fr0KUqGxpF/B4HX+grIV8hOrkth Muqfz6Z/V5mlI346pjVl0SNPAmOUI5BtuP6FR0Nw5q8yX0RjdNDNP4wiiNAExioEf/ wCiDZULctYYYznK6zLvl2qDbJHiPrftkKBXQlJxwxGCNziIa38ifc9qesY60kHKK0L xz4PG7ve5wO4A== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v8 05/23] ata: libata-scsi: Disable scsi device manage_system_start_stop Date: Wed, 27 Sep 2023 23:18:10 +0900 Message-ID: <20230927141828.90288-6-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230927141828.90288-1-dlemoal@kernel.org> References: <20230927141828.90288-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org The introduction of a device link to create a consumer/supplier relationship between the scsi device of an ATA device and the ATA port of that ATA device fixes the ordering of system suspend and resume operations. For suspend, the scsi device is suspended first and the ata port after it. This is fine as this allows the synchronize cache and START STOP UNIT commands issued by the scsi disk driver to be executed before the ata port is disabled. For resume operations, the ata port is resumed first, followed by the scsi device. This allows having the request queue of the scsi device to be unfrozen after the ata port resume is scheduled in EH, thus avoiding to see new requests prematurely issued to the ATA device. Since libata sets manage_system_start_stop to 1, the scsi disk resume operation also results in issuing a START STOP UNIT command to the device being resumed so that the device exits standby power mode. However, restoring the ATA device to the active power mode must be synchronized with libata EH processing of the port resume operation to avoid either 1) seeing the start stop unit command being received too early when the port is not yet resumed and ready to accept commands, or after the port resume process issues commands such as IDENTIFY to revalidate the device. In this last case, the risk is that the device revalidation fails with timeout errors as the drive is still spun down. Commit 0a8589055936 ("ata,scsi: do not issue START STOP UNIT on resume") disabled issuing the START STOP UNIT command to avoid issues with it. But this is incorrect as transitioning a device to the active power mode from the standby power mode set on suspend requires a media access command. The IDENTIFY, READ LOG and SET FEATURES commands executed in libata EH context triggered by the ata port resume operation may thus fail. Fix these synchronization issues is by handling a device power mode transitions for system suspend and resume directly in libata EH context, without relying on the scsi disk driver management triggered with the manage_system_start_stop flag. To do this, the following libata helper functions are introduced: 1) ata_dev_power_set_standby(): This function issues a STANDBY IMMEDIATE command to transitiom a device to the standby power mode. For HDDs, this spins down the disks. This function applies only to ATA and ZAC devices and does nothing otherwise. This function also does nothing for devices that have the ATA_FLAG_NO_POWEROFF_SPINDOWN or ATA_FLAG_NO_HIBERNATE_SPINDOWN flag set. For suspend, call ata_dev_power_set_standby() in ata_eh_handle_port_suspend() before the port is disabled and frozen. ata_eh_unload() is also modified to transition all enabled devices to the standby power mode when the system is shutdown or devices removed. 2) ata_dev_power_set_active() and This function applies to ATA or ZAC devices and issues a VERIFY command for 1 sector at LBA 0 to transition the device to the active power mode. For HDDs, since this function will complete only once the disk spin up. Its execution uses the same timeouts as for reset, to give the drive enough time to complete spinup without triggering a command timeout. For resume, call ata_dev_power_set_active() in ata_eh_revalidate_and_attach() after the port has been enabled and before any other command is issued to the device. With these changes, the manage_system_start_stop and no_start_on_resume scsi device flags do not need to be set in ata_scsi_dev_config(). The flag manage_runtime_start_stop is still set to allow the sd driver to spinup/spindown a disk through the sd runtime operations. Fixes: 0a8589055936 ("ata,scsi: do not issue START STOP UNIT on resume") Cc: stable@vger.kernel.org Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen --- drivers/ata/libata-core.c | 90 +++++++++++++++++++++++++++++++++++++++ drivers/ata/libata-eh.c | 46 +++++++++++++++++++- drivers/ata/libata-scsi.c | 16 +++---- drivers/ata/libata.h | 2 + include/linux/libata.h | 6 ++- 5 files changed, 148 insertions(+), 12 deletions(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 8e35afe5e560..a0bc01606b30 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -1972,6 +1972,96 @@ int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, return rc; } +/** + * ata_dev_power_set_standby - Set a device power mode to standby + * @dev: target device + * + * Issue a STANDBY IMMEDIATE command to set a device power mode to standby. + * For an HDD device, this spins down the disks. + * + * LOCKING: + * Kernel thread context (may sleep). + */ +void ata_dev_power_set_standby(struct ata_device *dev) +{ + unsigned long ap_flags = dev->link->ap->flags; + struct ata_taskfile tf; + unsigned int err_mask; + + /* Issue STANDBY IMMEDIATE command only if supported by the device */ + if (dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC) + return; + + /* + * Some odd clown BIOSes issue spindown on power off (ACPI S4 or S5) + * causing some drives to spin up and down again. For these, do nothing + * if we are being called on shutdown. + */ + if ((ap_flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && + system_state == SYSTEM_POWER_OFF) + return; + + if ((ap_flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && + system_entering_hibernation()) + return; + + ata_tf_init(dev, &tf); + tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; + tf.protocol = ATA_PROT_NODATA; + tf.command = ATA_CMD_STANDBYNOW1; + + ata_dev_notice(dev, "Entering standby power mode\n"); + + err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); + if (err_mask) + ata_dev_err(dev, "STANDBY IMMEDIATE failed (err_mask=0x%x)\n", + err_mask); +} + +/** + * ata_dev_power_set_active - Set a device power mode to active + * @dev: target device + * + * Issue a VERIFY command to enter to ensure that the device is in the + * active power mode. For a spun-down HDD (standby or idle power mode), + * the VERIFY command will complete after the disk spins up. + * + * LOCKING: + * Kernel thread context (may sleep). + */ +void ata_dev_power_set_active(struct ata_device *dev) +{ + struct ata_taskfile tf; + unsigned int err_mask; + + /* + * Issue READ VERIFY SECTORS command for 1 sector at lba=0 only + * if supported by the device. + */ + if (dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC) + return; + + ata_tf_init(dev, &tf); + tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; + tf.protocol = ATA_PROT_NODATA; + tf.command = ATA_CMD_VERIFY; + tf.nsect = 1; + if (dev->flags & ATA_DFLAG_LBA) { + tf.flags |= ATA_TFLAG_LBA; + tf.device |= ATA_LBA; + } else { + /* CHS */ + tf.lbal = 0x1; /* sect */ + } + + ata_dev_notice(dev, "Entering active power mode\n"); + + err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); + if (err_mask) + ata_dev_err(dev, "VERIFY failed (err_mask=0x%x)\n", + err_mask); +} + /** * ata_read_log_page - read a specific log page * @dev: target device diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index 4cf4f57e57b8..b1b2c276371e 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -147,6 +147,8 @@ ata_eh_cmd_timeout_table[ATA_EH_CMD_TIMEOUT_TABLE_SIZE] = { .timeouts = ata_eh_other_timeouts, }, { .commands = CMDS(ATA_CMD_FLUSH, ATA_CMD_FLUSH_EXT), .timeouts = ata_eh_flush_timeouts }, + { .commands = CMDS(ATA_CMD_VERIFY), + .timeouts = ata_eh_reset_timeouts }, }; #undef CMDS @@ -498,7 +500,19 @@ static void ata_eh_unload(struct ata_port *ap) struct ata_device *dev; unsigned long flags; - /* Restore SControl IPM and SPD for the next driver and + /* + * Unless we are restarting, transition all enabled devices to + * standby power mode. + */ + if (system_state != SYSTEM_RESTART) { + ata_for_each_link(link, ap, PMP_FIRST) { + ata_for_each_dev(dev, link, ENABLED) + ata_dev_power_set_standby(dev); + } + } + + /* + * Restore SControl IPM and SPD for the next driver and * disable attached devices. */ ata_for_each_link(link, ap, PMP_FIRST) { @@ -684,6 +698,10 @@ void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap) ehc->saved_xfer_mode[devno] = dev->xfer_mode; if (ata_ncq_enabled(dev)) ehc->saved_ncq_enabled |= 1 << devno; + + /* If we are resuming, wake up the device */ + if (ap->pflags & ATA_PFLAG_RESUMING) + ehc->i.dev_action[devno] |= ATA_EH_SET_ACTIVE; } } @@ -743,6 +761,8 @@ void ata_scsi_port_error_handler(struct Scsi_Host *host, struct ata_port *ap) /* clean up */ spin_lock_irqsave(ap->lock, flags); + ap->pflags &= ~ATA_PFLAG_RESUMING; + if (ap->pflags & ATA_PFLAG_LOADING) ap->pflags &= ~ATA_PFLAG_LOADING; else if ((ap->pflags & ATA_PFLAG_SCSI_HOTPLUG) && @@ -1218,6 +1238,13 @@ void ata_eh_detach_dev(struct ata_device *dev) struct ata_eh_context *ehc = &link->eh_context; unsigned long flags; + /* + * If the device is still enabled, transition it to standby power mode + * (i.e. spin down HDDs). + */ + if (ata_dev_enabled(dev)) + ata_dev_power_set_standby(dev); + ata_dev_disable(dev); spin_lock_irqsave(ap->lock, flags); @@ -3016,6 +3043,15 @@ static int ata_eh_revalidate_and_attach(struct ata_link *link, if (ehc->i.flags & ATA_EHI_DID_RESET) readid_flags |= ATA_READID_POSTRESET; + /* + * When resuming, before executing any command, make sure to + * transition the device to the active power mode. + */ + if ((action & ATA_EH_SET_ACTIVE) && ata_dev_enabled(dev)) { + ata_dev_power_set_active(dev); + ata_eh_done(link, dev, ATA_EH_SET_ACTIVE); + } + if ((action & ATA_EH_REVALIDATE) && ata_dev_enabled(dev)) { WARN_ON(dev->class == ATA_DEV_PMP); @@ -3989,6 +4025,7 @@ static void ata_eh_handle_port_suspend(struct ata_port *ap) unsigned long flags; int rc = 0; struct ata_device *dev; + struct ata_link *link; /* are we suspending? */ spin_lock_irqsave(ap->lock, flags); @@ -4001,6 +4038,12 @@ static void ata_eh_handle_port_suspend(struct ata_port *ap) WARN_ON(ap->pflags & ATA_PFLAG_SUSPENDED); + /* Set all devices attached to the port in standby mode */ + ata_for_each_link(link, ap, HOST_FIRST) { + ata_for_each_dev(dev, link, ENABLED) + ata_dev_power_set_standby(dev); + } + /* * If we have a ZPODD attached, check its zero * power ready status before the port is frozen. @@ -4083,6 +4126,7 @@ static void ata_eh_handle_port_resume(struct ata_port *ap) /* update the flags */ spin_lock_irqsave(ap->lock, flags); ap->pflags &= ~(ATA_PFLAG_PM_PENDING | ATA_PFLAG_SUSPENDED); + ap->pflags |= ATA_PFLAG_RESUMING; spin_unlock_irqrestore(ap->lock, flags); } #endif /* CONFIG_PM */ diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 73428ad0c8d2..a0e58d22d222 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -1050,15 +1050,13 @@ int ata_scsi_dev_config(struct scsi_device *sdev, struct ata_device *dev) } } else { sdev->sector_size = ata_id_logical_sector_size(dev->id); + /* - * Stop the drive on suspend but do not issue START STOP UNIT - * on resume as this is not necessary and may fail: the device - * will be woken up by ata_port_pm_resume() with a port reset - * and device revalidation. + * Ask the sd driver to issue START STOP UNIT on runtime suspend + * and resume only. For system level suspend/resume, devices + * power state is handled directly by libata EH. */ - sdev->manage_system_start_stop = true; sdev->manage_runtime_start_stop = true; - sdev->no_start_on_resume = 1; } /* @@ -1231,7 +1229,7 @@ static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) } if (cdb[4] & 0x1) { - tf->nsect = 1; /* 1 sector, lba=0 */ + tf->nsect = 1; /* 1 sector, lba=0 */ if (qc->dev->flags & ATA_DFLAG_LBA) { tf->flags |= ATA_TFLAG_LBA; @@ -1247,7 +1245,7 @@ static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) tf->lbah = 0x0; /* cyl high */ } - tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ + tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ } else { /* Some odd clown BIOSen issue spindown on power off (ACPI S4 * or S5) causing some drives to spin up and down again. @@ -1257,7 +1255,7 @@ static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) goto skip; if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && - system_entering_hibernation()) + system_entering_hibernation()) goto skip; /* Issue ATA STANDBY IMMEDIATE command */ diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h index 6e7d352803bd..820299bd9d06 100644 --- a/drivers/ata/libata.h +++ b/drivers/ata/libata.h @@ -60,6 +60,8 @@ extern int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags); extern int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, unsigned int readid_flags); extern int ata_dev_configure(struct ata_device *dev); +extern void ata_dev_power_set_standby(struct ata_device *dev); +extern void ata_dev_power_set_active(struct ata_device *dev); extern int sata_down_spd_limit(struct ata_link *link, u32 spd_limit); extern int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel); extern unsigned int ata_dev_set_feature(struct ata_device *dev, diff --git a/include/linux/libata.h b/include/linux/libata.h index 4ece1b7a2a5b..00b4a2b7819a 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -192,6 +192,7 @@ enum { ATA_PFLAG_UNLOADING = (1 << 9), /* driver is being unloaded */ ATA_PFLAG_UNLOADED = (1 << 10), /* driver is unloaded */ + ATA_PFLAG_RESUMING = (1 << 16), /* port is being resumed */ ATA_PFLAG_SUSPENDED = (1 << 17), /* port is suspended (power) */ ATA_PFLAG_PM_PENDING = (1 << 18), /* PM operation pending */ ATA_PFLAG_INIT_GTM_VALID = (1 << 19), /* initial gtm data valid */ @@ -318,9 +319,10 @@ enum { ATA_EH_ENABLE_LINK = (1 << 3), ATA_EH_PARK = (1 << 5), /* unload heads and stop I/O */ ATA_EH_GET_SUCCESS_SENSE = (1 << 6), /* Get sense data for successful cmd */ + ATA_EH_SET_ACTIVE = (1 << 7), /* Set a device to active power mode */ ATA_EH_PERDEV_MASK = ATA_EH_REVALIDATE | ATA_EH_PARK | - ATA_EH_GET_SUCCESS_SENSE, + ATA_EH_GET_SUCCESS_SENSE | ATA_EH_SET_ACTIVE, ATA_EH_ALL_ACTIONS = ATA_EH_REVALIDATE | ATA_EH_RESET | ATA_EH_ENABLE_LINK, @@ -357,7 +359,7 @@ enum { /* This should match the actual table size of * ata_eh_cmd_timeout_table in libata-eh.c. */ - ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 7, + ATA_EH_CMD_TIMEOUT_TABLE_SIZE = 8, /* Horkage types. May be set by libata or controller on drives (some horkage may be drive/controller pair dependent */ From patchwork Wed Sep 27 14:18:11 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 728011 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 D4992E80AB2 for ; Wed, 27 Sep 2023 14:18:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232110AbjI0OSr (ORCPT ); Wed, 27 Sep 2023 10:18:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48846 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232111AbjI0OSp (ORCPT ); Wed, 27 Sep 2023 10:18:45 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C520D1A5; Wed, 27 Sep 2023 07:18:41 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0CD2CC433CA; Wed, 27 Sep 2023 14:18:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695824321; bh=ik19lq+ERlumDPH54ngc0E0xU+WBkhsw73WhZe3YVtY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Cv/jWr+TaJKr41E7NFCoDe6xB6CaMhp8TQLFaZkmntYQpvWCa2eqiS9D/88YV3RiU E73sIYyXaS6PI7QKDZUt/ZrY61xHMPACRKn1gHHEtQuDpJXYcE2BKrHnz64YKBPcP8 T8bHeaivxDlXZ8H4wIGeUh49//F5N2dQ12fqUauhLnFaY8UEAo0RE5yBiX+8CoXraH zi+EvekKH1k11lC208fQ7bA1cVHjJQBQEY80G256QajPlae+E4vXBp20eSK+JC3Q6N nq4yeGS9IO4RkHQEKwg582oseYK79ZsWN1LOsrPCEK/XQKVFzCRvozTK6H3ZPw9gBw Ynirt8XFppFJA== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v8 06/23] scsi: Do not attempt to rescan suspended devices Date: Wed, 27 Sep 2023 23:18:11 +0900 Message-ID: <20230927141828.90288-7-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230927141828.90288-1-dlemoal@kernel.org> References: <20230927141828.90288-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org scsi_rescan_device() takes a scsi device lock before executing a device handler and device driver rescan methods. Waiting for the completion of any command issued to the device by these methods will thus be done with the device lock held. As a result, there is a risk of deadlocking within the power management code if scsi_rescan_device() is called to handle a device resume with the associated scsi device not yet resumed. Avoid such situation by checking that the target scsi device is in the running state, that is, fully capable of executing commands, before proceeding with the rescan and bailout returning -EWOULDBLOCK otherwise. With this error return, the caller can retry rescaning the device after a delay. The state check is done with the device lock held and is thus safe against incoming suspend power management operations. Fixes: 6aa0365a3c85 ("ata: libata-scsi: Avoid deadlock on rescan after device resume") Cc: stable@vger.kernel.org Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Reviewed-by: Niklas Cassel Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen Reviewed-by: Bart Van Assche --- drivers/scsi/scsi_scan.c | 18 +++++++++++++++++- include/scsi/scsi_host.h | 2 +- 2 files changed, 18 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c index 52014b2d39e1..3db4d31a03a1 100644 --- a/drivers/scsi/scsi_scan.c +++ b/drivers/scsi/scsi_scan.c @@ -1619,12 +1619,24 @@ int scsi_add_device(struct Scsi_Host *host, uint channel, } EXPORT_SYMBOL(scsi_add_device); -void scsi_rescan_device(struct scsi_device *sdev) +int scsi_rescan_device(struct scsi_device *sdev) { struct device *dev = &sdev->sdev_gendev; + int ret = 0; device_lock(dev); + /* + * Bail out if the device is not running. Otherwise, the rescan may + * block waiting for commands to be executed, with us holding the + * device lock. This can result in a potential deadlock in the power + * management core code when system resume is on-going. + */ + if (sdev->sdev_state != SDEV_RUNNING) { + ret = -EWOULDBLOCK; + goto unlock; + } + scsi_attach_vpd(sdev); scsi_cdl_check(sdev); @@ -1638,7 +1650,11 @@ void scsi_rescan_device(struct scsi_device *sdev) drv->rescan(dev); module_put(dev->driver->owner); } + +unlock: device_unlock(dev); + + return ret; } EXPORT_SYMBOL(scsi_rescan_device); diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index 49f768d0ff37..4c2dc8150c6d 100644 --- a/include/scsi/scsi_host.h +++ b/include/scsi/scsi_host.h @@ -764,7 +764,7 @@ scsi_template_proc_dir(const struct scsi_host_template *sht); #define scsi_template_proc_dir(sht) NULL #endif extern void scsi_scan_host(struct Scsi_Host *); -extern void scsi_rescan_device(struct scsi_device *); +extern int scsi_rescan_device(struct scsi_device *sdev); extern void scsi_remove_host(struct Scsi_Host *); extern struct Scsi_Host *scsi_host_get(struct Scsi_Host *); extern int scsi_host_busy(struct Scsi_Host *shost); From patchwork Wed Sep 27 14:18:12 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 726997 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 24C16E80AB2 for ; Wed, 27 Sep 2023 14:19:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232148AbjI0OTB (ORCPT ); Wed, 27 Sep 2023 10:19:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48900 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232122AbjI0OSp (ORCPT ); Wed, 27 Sep 2023 10:18:45 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 75D7E1B0; Wed, 27 Sep 2023 07:18:43 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B90F0C433CD; Wed, 27 Sep 2023 14:18:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695824323; bh=95kUku/WnLh9/5sDfj6QxQRL5hrpWONzJ8O/c0Hk10s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=g7nDzUnsjU9Ke/0ZUr99vWTx99K0woFLawZS3RLAfX0gCcj4rhH4aJREZ0GlqR+Fa ALFch4VCUMqidn6zFkS5eVXeFgeqlSdl3CaZ8v+wARWTHe+nuRiFW8iqSV89FpvXoE WBlFl3FUlGe0+t0BsRlhhwXjKKYjSRHqd1ijz0nYz7unheVbdtt61qQfvCdGf6iOg1 hV5ZIbyBFYS79lKwF5He9fska8Wk2XMxJ6/KH9ob4irD4cSsrhZcbl7+uK24tctPT7 s3mdi3tm5ROsNKM6cgE0ISldnPLPFDi42R/esD0reqiiH+Wm323eP8ElWQH8tmhOvm Y7VJzMZaef/DA== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v8 07/23] ata: libata-scsi: Fix delayed scsi_rescan_device() execution Date: Wed, 27 Sep 2023 23:18:12 +0900 Message-ID: <20230927141828.90288-8-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230927141828.90288-1-dlemoal@kernel.org> References: <20230927141828.90288-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Commit 6aa0365a3c85 ("ata: libata-scsi: Avoid deadlock on rescan after device resume") modified ata_scsi_dev_rescan() to check the scsi device "is_suspended" power field to ensure that the scsi device associated with an ATA device is fully resumed when scsi_rescan_device() is executed. However, this fix is problematic as: 1) It relies on a PM internal field that should not be used without PM device locking protection. 2) The check for is_suspended and the call to scsi_rescan_device() are not atomic and a suspend PM event may be triggered between them, casuing scsi_rescan_device() to be called on a suspended device and in that function blocking while holding the scsi device lock. This would deadlock a following resume operation. These problems can trigger PM deadlocks on resume, especially with resume operations triggered quickly after or during suspend operations. E.g., a simple bash script like: for (( i=0; i<10; i++ )); do echo "+2 > /sys/class/rtc/rtc0/wakealarm echo mem > /sys/power/state done that triggers a resume 2 seconds after starting suspending a system can quickly lead to a PM deadlock preventing the system from correctly resuming. Fix this by replacing the check on is_suspended with a check on the return value given by scsi_rescan_device() as that function will fail if called against a suspended device. Also make sure rescan tasks already scheduled are first cancelled before suspending an ata port. Fixes: 6aa0365a3c85 ("ata: libata-scsi: Avoid deadlock on rescan after device resume") Cc: stable@vger.kernel.org Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Reviewed-by: Niklas Cassel Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen --- drivers/ata/libata-core.c | 16 ++++++++++++++++ drivers/ata/libata-scsi.c | 33 +++++++++++++++------------------ 2 files changed, 31 insertions(+), 18 deletions(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index a0bc01606b30..092372334e92 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -5168,11 +5168,27 @@ static const unsigned int ata_port_suspend_ehi = ATA_EHI_QUIET static void ata_port_suspend(struct ata_port *ap, pm_message_t mesg) { + /* + * We are about to suspend the port, so we do not care about + * scsi_rescan_device() calls scheduled by previous resume operations. + * The next resume will schedule the rescan again. So cancel any rescan + * that is not done yet. + */ + cancel_delayed_work_sync(&ap->scsi_rescan_task); + ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, false); } static void ata_port_suspend_async(struct ata_port *ap, pm_message_t mesg) { + /* + * We are about to suspend the port, so we do not care about + * scsi_rescan_device() calls scheduled by previous resume operations. + * The next resume will schedule the rescan again. So cancel any rescan + * that is not done yet. + */ + cancel_delayed_work_sync(&ap->scsi_rescan_task); + ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, true); } diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index a0e58d22d222..6850cac803c1 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -4756,7 +4756,7 @@ void ata_scsi_dev_rescan(struct work_struct *work) struct ata_link *link; struct ata_device *dev; unsigned long flags; - bool delay_rescan = false; + int ret = 0; mutex_lock(&ap->scsi_scan_mutex); spin_lock_irqsave(ap->lock, flags); @@ -4765,37 +4765,34 @@ void ata_scsi_dev_rescan(struct work_struct *work) ata_for_each_dev(dev, link, ENABLED) { struct scsi_device *sdev = dev->sdev; + /* + * If the port was suspended before this was scheduled, + * bail out. + */ + if (ap->pflags & ATA_PFLAG_SUSPENDED) + goto unlock; + if (!sdev) continue; if (scsi_device_get(sdev)) continue; - /* - * If the rescan work was scheduled because of a resume - * event, the port is already fully resumed, but the - * SCSI device may not yet be fully resumed. In such - * case, executing scsi_rescan_device() may cause a - * deadlock with the PM code on device_lock(). Prevent - * this by giving up and retrying rescan after a short - * delay. - */ - delay_rescan = sdev->sdev_gendev.power.is_suspended; - if (delay_rescan) { - scsi_device_put(sdev); - break; - } - spin_unlock_irqrestore(ap->lock, flags); - scsi_rescan_device(sdev); + ret = scsi_rescan_device(sdev); scsi_device_put(sdev); spin_lock_irqsave(ap->lock, flags); + + if (ret) + goto unlock; } } +unlock: spin_unlock_irqrestore(ap->lock, flags); mutex_unlock(&ap->scsi_scan_mutex); - if (delay_rescan) + /* Reschedule with a delay if scsi_rescan_device() returned an error */ + if (ret) schedule_delayed_work(&ap->scsi_rescan_task, msecs_to_jiffies(5)); } From patchwork Wed Sep 27 14:18:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 728010 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 A1025E80AB3 for ; Wed, 27 Sep 2023 14:19:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232122AbjI0OTC (ORCPT ); Wed, 27 Sep 2023 10:19:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57708 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232127AbjI0OSq (ORCPT ); Wed, 27 Sep 2023 10:18:46 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2F394FC; Wed, 27 Sep 2023 07:18:45 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7223EC433C7; Wed, 27 Sep 2023 14:18:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695824324; bh=CljvVIVxFNHJc2Ic3izyRBe4muX/ukU24KeSDfkZp7E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SUTgp8jjmWiYa2AjLXBUd676rDiht67t4SvjLTn1K07tPTflYOdi34+EzynPlk3lM 5lsHxlOsigNGV+CU3Hb6m0PGR9dUyYXIOZVdWr13xPgQkJpUyp5qUJFnHCrCIvM8Bi 8w1j1KOjTGk4X551bsMyZFaxvgUoJ5LO8FsC2EuNCs/5c4yjG/AdBWsmGGnrmntGjs lfQjPACybmMLjan3U4pgt6JOgYNvEHgtzfMoxILM+2Cb9H4jfdGBzMhpxQn87EyoQE 98f0shNVvZL+9dFmbiqSdDdmp44tvnBB1WhUTrbKMdkf0sFAXtTh5FsGc7de+NODnt 8j+dTNXdadqYw== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v8 08/23] ata: libata-core: Do not register PM operations for SAS ports Date: Wed, 27 Sep 2023 23:18:13 +0900 Message-ID: <20230927141828.90288-9-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230927141828.90288-1-dlemoal@kernel.org> References: <20230927141828.90288-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org libsas does its own domain based power management of ports. For such ports, libata should not use a device type defining power management operations as executing these operations for suspend/resume in addition to libsas calls to ata_sas_port_suspend() and ata_sas_port_resume() is not necessary (and likely dangerous to do, even though problems are not seen currently). Introduce the new ata_port_sas_type device_type for ports managed by libsas. This new device type is used in ata_tport_add() and is defined without power management operations. Fixes: 2fcbdcb4c802 ("[SCSI] libata: export ata_port suspend/resume infrastructure for sas") Cc: stable@vger.kernel.org Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Tested-by: Chia-Lin Kao (AceLan) Tested-by: Geert Uytterhoeven Reviewed-by: John Garry Reviewed-by: Martin K. Petersen --- drivers/ata/libata-core.c | 2 +- drivers/ata/libata-transport.c | 9 ++++++++- drivers/ata/libata.h | 2 ++ 3 files changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 092372334e92..261445c1851b 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -5335,7 +5335,7 @@ EXPORT_SYMBOL_GPL(ata_host_resume); #endif const struct device_type ata_port_type = { - .name = "ata_port", + .name = ATA_PORT_TYPE_NAME, #ifdef CONFIG_PM .pm = &ata_port_pm_ops, #endif diff --git a/drivers/ata/libata-transport.c b/drivers/ata/libata-transport.c index e4fb9d1b9b39..3e49a877500e 100644 --- a/drivers/ata/libata-transport.c +++ b/drivers/ata/libata-transport.c @@ -266,6 +266,10 @@ void ata_tport_delete(struct ata_port *ap) put_device(dev); } +static const struct device_type ata_port_sas_type = { + .name = ATA_PORT_TYPE_NAME, +}; + /** ata_tport_add - initialize a transport ATA port structure * * @parent: parent device @@ -283,7 +287,10 @@ int ata_tport_add(struct device *parent, struct device *dev = &ap->tdev; device_initialize(dev); - dev->type = &ata_port_type; + if (ap->flags & ATA_FLAG_SAS_HOST) + dev->type = &ata_port_sas_type; + else + dev->type = &ata_port_type; dev->parent = parent; ata_host_get(ap->host); diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h index 820299bd9d06..05ac80da8ebc 100644 --- a/drivers/ata/libata.h +++ b/drivers/ata/libata.h @@ -30,6 +30,8 @@ enum { ATA_DNXFER_QUIET = (1 << 31), }; +#define ATA_PORT_TYPE_NAME "ata_port" + extern atomic_t ata_print_id; extern int atapi_passthru16; extern int libata_fua; From patchwork Wed Sep 27 14:18:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 728009 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 5877DE80AAD for ; Wed, 27 Sep 2023 14:19:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232149AbjI0OTD (ORCPT ); Wed, 27 Sep 2023 10:19:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48944 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232111AbjI0OSr (ORCPT ); Wed, 27 Sep 2023 10:18:47 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D9428180; Wed, 27 Sep 2023 07:18:46 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 28838C433C9; Wed, 27 Sep 2023 14:18:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695824326; bh=sAio6aqIhgHlSbAesQVdGPbpJneLSr2tVn08yBMf2Yw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kuMM1Ouh4caZU0D4lu4C8WDNhufKdgDwCQScv+K3kdNXEkaeAxE5X8mm9JfGc2PbF n9U9IpAf98qKdcgPeUwRkQldmxcRXfmHLNX2lv3vgAQQz4hrKdqOCPMxFXHNqoGAo1 8m52GddjUaazszMdBrJHPfcdoNxyKb7NIJbtUYSx0CxxTwlCdHaZLL41OZ01OKk03p x2vSHI4L7PAGJGDhdw751mNtggZzgNg8D8FonYJE9JAiYYzoLKCFA4cp/BUl1Z7c8R jDCYmBNtf0Bb81YnROOKJtM87EZd+PyITWec/eV1rns1zQvd6wILp0PMF9qVOdsMal tvEcoE/9cNb3A== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v8 09/23] scsi: sd: Do not issue commands to suspended disks on shutdown Date: Wed, 27 Sep 2023 23:18:14 +0900 Message-ID: <20230927141828.90288-10-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230927141828.90288-1-dlemoal@kernel.org> References: <20230927141828.90288-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org If an error occurs when resuming a host adapter before the devices attached to the adapter are resumed, the adapter low level driver may remove the scsi host, resulting in a call to sd_remove() for the disks of the host. This in turn results in a call to sd_shutdown() which will issue a synchronize cache command and a start stop unit command to spindown the disk. sd_shutdown() issues the commands only if the device is not already runtime suspended but does not check the power state for system-wide suspend/resume. That is, the commands may be issued with the device in a suspended state, which causes PM resume to hang, forcing a reset of the machine to recover. Fix this by tracking the suspended state of a disk by introducing the suspended boolean field in the scsi_disk structure. This flag is set to true when the disk is suspended is sd_suspend_common() and resumed with sd_resume(). When suspended is true, sd_shutdown() is not executed from sd_remove(). Cc: stable@vger.kernel.org Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke --- drivers/scsi/sd.c | 17 +++++++++++++---- drivers/scsi/sd.h | 1 + 2 files changed, 14 insertions(+), 4 deletions(-) diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index a1ef4eef904f..f911a64521e6 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -3741,7 +3741,8 @@ static int sd_remove(struct device *dev) device_del(&sdkp->disk_dev); del_gendisk(sdkp->disk); - sd_shutdown(dev); + if (!sdkp->suspended) + sd_shutdown(dev); put_disk(sdkp->disk); return 0; @@ -3872,6 +3873,9 @@ static int sd_suspend_common(struct device *dev, bool runtime) ret = 0; } + if (!ret) + sdkp->suspended = true; + return ret; } @@ -3891,21 +3895,26 @@ static int sd_suspend_runtime(struct device *dev) static int sd_resume(struct device *dev, bool runtime) { struct scsi_disk *sdkp = dev_get_drvdata(dev); - int ret; + int ret = 0; if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */ return 0; - if (!sd_do_start_stop(sdkp->device, runtime)) + if (!sd_do_start_stop(sdkp->device, runtime)) { + sdkp->suspended = false; return 0; + } if (!sdkp->device->no_start_on_resume) { sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); ret = sd_start_stop_device(sdkp, 1); } - if (!ret) + if (!ret) { opal_unlock_from_suspend(sdkp->opal_dev); + sdkp->suspended = false; + } + return ret; } diff --git a/drivers/scsi/sd.h b/drivers/scsi/sd.h index 5eea762f84d1..14153ef7a414 100644 --- a/drivers/scsi/sd.h +++ b/drivers/scsi/sd.h @@ -131,6 +131,7 @@ struct scsi_disk { u8 provisioning_mode; u8 zeroing_mode; u8 nr_actuators; /* Number of actuators */ + bool suspended; /* Disk is supended (stopped) */ unsigned ATO : 1; /* state of disk ATO bit */ unsigned cache_override : 1; /* temp override of WCE,RCD */ unsigned WCE : 1; /* state of disk WCE bit */ From patchwork Wed Sep 27 14:18:15 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 726996 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 90AA0E80AAF for ; Wed, 27 Sep 2023 14:19:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232151AbjI0OTE (ORCPT ); Wed, 27 Sep 2023 10:19:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57726 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232115AbjI0OSt (ORCPT ); Wed, 27 Sep 2023 10:18:49 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8C82E192; Wed, 27 Sep 2023 07:18:48 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D2A9AC433C7; Wed, 27 Sep 2023 14:18:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695824328; bh=Nuc+MZpf4KfLgN19GmaNjXBJFuRsq9TSy5jYG3r6bX4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Z3c5+vw9KMerlwpGjfVnhWShHbRNl0fvq8bzL49NR0BBhIt8vpTneILVDu/F6LDr1 QeMoPMYoiMc0vbD9698lTxJw1SzFblH5j/CUsHzzN2olxvcZCSwiSXHANMdSD5fEUl rEfNwDvqaqCTgU1bX7xlWf7v0beS6lNi+6gW6c//tKvOeW0Q50UVp55wRckT8h21YL AeYOhJckVfD/UbEWGwxxFRkjHZrS1xVBm8NGSxC3mriE1Dh3BdFMCU4NQr725WWmwc yHFMr0F0hDbhcaC3AdMlHhKg1+8ptBW7cvrkJme9skKFtFzKYK6+tQ6gciPF+LDiG+ HarQQc4F7Yzmg== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v8 10/23] ata: libata-core: Fix compilation warning in ata_dev_config_ncq() Date: Wed, 27 Sep 2023 23:18:15 +0900 Message-ID: <20230927141828.90288-11-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230927141828.90288-1-dlemoal@kernel.org> References: <20230927141828.90288-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org The 24 bytes length allocated to the ncq_desc string in ata_dev_config_lba() for ata_dev_config_ncq() to use is too short, causing the following gcc compilation warnings when compiling with W=1: drivers/ata/libata-core.c: In function ‘ata_dev_configure’: drivers/ata/libata-core.c:2378:56: warning: ‘%d’ directive output may be truncated writing between 1 and 2 bytes into a region of size between 1 and 11 [-Wformat-truncation=] 2378 | snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth, | ^~ In function ‘ata_dev_config_ncq’, inlined from ‘ata_dev_config_lba’ at drivers/ata/libata-core.c:2649:8, inlined from ‘ata_dev_configure’ at drivers/ata/libata-core.c:2952:9: drivers/ata/libata-core.c:2378:41: note: directive argument in the range [1, 32] 2378 | snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth, | ^~~~~~~~~~~~~~~~~~~~~ drivers/ata/libata-core.c:2378:17: note: ‘snprintf’ output between 16 and 31 bytes into a destination of size 24 2378 | snprintf(desc, desc_sz, "NCQ (depth %d/%d)%s", hdepth, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 2379 | ddepth, aa_desc); | ~~~~~~~~~~~~~~~~ Avoid these warnings and the potential truncation by changing the size of the ncq_desc string to 32 characters. Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen --- drivers/ata/libata-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 261445c1851b..d8cc1e27a125 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -2619,7 +2619,7 @@ static int ata_dev_config_lba(struct ata_device *dev) { const u16 *id = dev->id; const char *lba_desc; - char ncq_desc[24]; + char ncq_desc[32]; int ret; dev->flags |= ATA_DFLAG_LBA; From patchwork Wed Sep 27 14:18:16 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 728008 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 A9D6AE80AB1 for ; Wed, 27 Sep 2023 14:19:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232173AbjI0OTV (ORCPT ); Wed, 27 Sep 2023 10:19:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52994 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232131AbjI0OS7 (ORCPT ); Wed, 27 Sep 2023 10:18:59 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4657A1A6; Wed, 27 Sep 2023 07:18:50 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 877C7C433CB; Wed, 27 Sep 2023 14:18:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695824329; bh=gRfGxVc1daq/nrFb0KHKXOqTTy7EybTfeFXo5KQ/LCU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WJ93e1O2aCfFSdkyFU3/iCzwDje75ztNopozysT7OLsLX9cGazN3fjsPH8bnjWu9i ABPH4kmGAZ1iSOH5TzGpKm3AbP/ukaAkW0tRXv0QkFiFEF7maJI/lGIwBk7GhxuxYP xaL70n3C9e/tfMJQrMHjuhdRbsRS9w/F9L+1uksWkW1BgY3PKC5wK4+lH2F8cqIEoA LLR287zYEpFvjb0/WtbMLWy0ecobd/AhdGzDHxWhfV7hpLx5Zm7v0eMa0xgpC9D53M 0DDPd1ap8rwG1M3K+9VZvvEZeDmrz/JPYggWv8kj1/0ji2BXQo4NmvWxg8i3xxKZgp D/Te+GoMq4Few== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v8 11/23] ata: libata-eh: Fix compilation warning in ata_eh_link_report() Date: Wed, 27 Sep 2023 23:18:16 +0900 Message-ID: <20230927141828.90288-12-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230927141828.90288-1-dlemoal@kernel.org> References: <20230927141828.90288-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org The 6 bytes length of the tries_buf string in ata_eh_link_report() is too short and results in a gcc compilation warning with W-!: drivers/ata/libata-eh.c: In function ‘ata_eh_link_report’: drivers/ata/libata-eh.c:2371:59: warning: ‘%d’ directive output may be truncated writing between 1 and 11 bytes into a region of size 4 [-Wformat-truncation=] 2371 | snprintf(tries_buf, sizeof(tries_buf), " t%d", | ^~ drivers/ata/libata-eh.c:2371:56: note: directive argument in the range [-2147483648, 4] 2371 | snprintf(tries_buf, sizeof(tries_buf), " t%d", | ^~~~~~ drivers/ata/libata-eh.c:2371:17: note: ‘snprintf’ output between 4 and 14 bytes into a destination of size 6 2371 | snprintf(tries_buf, sizeof(tries_buf), " t%d", | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 2372 | ap->eh_tries); | ~~~~~~~~~~~~~ Avoid this warning by increasing the string size to 16B. Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen --- drivers/ata/libata-eh.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index b1b2c276371e..5686353e442c 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -2332,7 +2332,7 @@ static void ata_eh_link_report(struct ata_link *link) struct ata_eh_context *ehc = &link->eh_context; struct ata_queued_cmd *qc; const char *frozen, *desc; - char tries_buf[6] = ""; + char tries_buf[16] = ""; int tag, nr_failed = 0; if (ehc->i.flags & ATA_EHI_QUIET) From patchwork Wed Sep 27 14:18:17 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 726995 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 DEDA9E80AB4 for ; Wed, 27 Sep 2023 14:19:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232183AbjI0OTW (ORCPT ); Wed, 27 Sep 2023 10:19:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53006 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232137AbjI0OTA (ORCPT ); Wed, 27 Sep 2023 10:19:00 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F406A1AA; Wed, 27 Sep 2023 07:18:51 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3CD5FC433C8; Wed, 27 Sep 2023 14:18:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695824331; bh=MCJ2jnqPb87vnj3cqQeOcdyKKQhFLSSAKk5so46G2FI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nJr+zJbgZ98G6NBn0QWyHk35M2UTRTqR7yjXL+jQei2Edy4WjUcN7gArnfNCGlsYq WiN9baeIusrnhDZde1bN7j3HC9IK2Dx3MGhSBuHSszo4Ask/Ua/xueiymox0TZyN9d q0TsuunbYLO+LDtq2bS4O/IWcMJfZ/QO8yrgCGhvU9WPdRJsuQUpWyVwTZ30+AeZzi nv+UO8aCzWFhK/YxMFeKxlE+yZg2qB/uvzP/cvOq2PBNvhJ7l/bRwHYCbtH3BpzUlP d5ViG7+o8OovjrxziHspAW0UPjpKx08fjFDRbf5DgSxaMJrP9QOiQ3x70M2F9GW3sN s6wp16Ou53XBQ== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v8 12/23] scsi: Remove scsi device no_start_on_resume flag Date: Wed, 27 Sep 2023 23:18:17 +0900 Message-ID: <20230927141828.90288-13-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230927141828.90288-1-dlemoal@kernel.org> References: <20230927141828.90288-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org The scsi device flag no_start_on_resume is not set by any scsi low level driver. Remove it. This reverts the changes introduced by commit 0a8589055936 ("ata,scsi: do not issue START STOP UNIT on resume"). Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Tested-by: Chia-Lin Kao (AceLan) Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen Reviewed-by: Martin K. Petersen --- drivers/scsi/sd.c | 9 +++------ include/scsi/scsi_device.h | 1 - 2 files changed, 3 insertions(+), 7 deletions(-) diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index f911a64521e6..37a7d9cd2df3 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -3895,7 +3895,7 @@ static int sd_suspend_runtime(struct device *dev) static int sd_resume(struct device *dev, bool runtime) { struct scsi_disk *sdkp = dev_get_drvdata(dev); - int ret = 0; + int ret; if (!sdkp) /* E.g.: runtime resume at the start of sd_probe() */ return 0; @@ -3905,11 +3905,8 @@ static int sd_resume(struct device *dev, bool runtime) return 0; } - if (!sdkp->device->no_start_on_resume) { - sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); - ret = sd_start_stop_device(sdkp, 1); - } - + sd_printk(KERN_NOTICE, sdkp, "Starting disk\n"); + ret = sd_start_stop_device(sdkp, 1); if (!ret) { opal_unlock_from_suspend(sdkp->opal_dev); sdkp->suspended = false; diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index fd41fdac0a8e..e6e476fe2272 100644 --- a/include/scsi/scsi_device.h +++ b/include/scsi/scsi_device.h @@ -197,7 +197,6 @@ struct scsi_device { unsigned use_192_bytes_for_3f:1; /* ask for 192 bytes from page 0x3f */ unsigned no_start_on_add:1; /* do not issue start on add */ unsigned allow_restart:1; /* issue START_UNIT in error handler */ - unsigned no_start_on_resume:1; /* Do not issue START_STOP_UNIT on resume */ unsigned start_stop_pwr_cond:1; /* Set power cond. in START_STOP_UNIT */ unsigned no_uld_attach:1; /* disable connecting to upper level drivers */ unsigned select_no_atn:1; From patchwork Wed Sep 27 14:18:18 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 728007 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 46E24E80AB6 for ; Wed, 27 Sep 2023 14:19:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232186AbjI0OTX (ORCPT ); Wed, 27 Sep 2023 10:19:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48966 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232143AbjI0OTA (ORCPT ); Wed, 27 Sep 2023 10:19:00 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A01211B6; Wed, 27 Sep 2023 07:18:53 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E645EC433C9; Wed, 27 Sep 2023 14:18:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695824333; bh=PMj7iS+ODMTYln36IKNO/TS68wImEfCp7PAKE3VdLBg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uYbo7k4kutAIZxLjuMa6+Yc2tJj28j9O9t2h9crYF+1Y+sbR5wNIz1pjoDKHaluIO YbQRCDQAQ3ceKEYUOTUbhiLAqR/ueAhDiT2mYVh5bbbasFvJLTHp0AFLPsA/xkqT87 qZHREjoGIlNeMUy2lVYAsUnWMwL1KScNhmy8dBn6WInwF4NfF9d46GZyo9tgWx7xCX RyfvYdfgvOrB7f4iRqC9AZU8A74MgsYP4G3y1oYv6zypUou+F/zVSzhm4Cg1T3HNkY rKOx7qtFavGsozJTdR0fu8qo+b01vy3Za59FECs7CCrJXfpdbVuVFB8pqw073W27zs clZBytJSAgKEA== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v8 13/23] ata: libata-scsi: Cleanup ata_scsi_start_stop_xlat() Date: Wed, 27 Sep 2023 23:18:18 +0900 Message-ID: <20230927141828.90288-14-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230927141828.90288-1-dlemoal@kernel.org> References: <20230927141828.90288-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Now that libata does its own internal device power mode management through libata EH, the scsi disk driver will not issue START STOP UNIT commands anymore. We can receive this command only from user passthrough operations. So there is no need to consider the system state and ATA port flags for suspend to translate the command. Since setting up the taskfile for the verify and standby immediate commands is the same as done in ata_dev_power_set_active() and ata_dev_power_set_standby(), factor out this code into the helper function ata_dev_power_init_tf() to simplify ata_scsi_start_stop_xlat() as well as ata_dev_power_set_active() and ata_dev_power_set_standby(). Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Tested-by: Chia-Lin Kao (AceLan) Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen --- drivers/ata/libata-core.c | 55 +++++++++++++++++++++++---------------- drivers/ata/libata-scsi.c | 53 +++++++------------------------------ drivers/ata/libata.h | 2 ++ 3 files changed, 44 insertions(+), 66 deletions(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index d8cc1e27a125..8e326a445765 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -1972,6 +1972,35 @@ int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class, return rc; } +bool ata_dev_power_init_tf(struct ata_device *dev, struct ata_taskfile *tf, + bool set_active) +{ + /* Only applies to ATA and ZAC devices */ + if (dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC) + return false; + + ata_tf_init(dev, tf); + tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; + tf->protocol = ATA_PROT_NODATA; + + if (set_active) { + /* VERIFY for 1 sector at lba=0 */ + tf->command = ATA_CMD_VERIFY; + tf->nsect = 1; + if (dev->flags & ATA_DFLAG_LBA) { + tf->flags |= ATA_TFLAG_LBA; + tf->device |= ATA_LBA; + } else { + /* CHS */ + tf->lbal = 0x1; /* sect */ + } + } else { + tf->command = ATA_CMD_STANDBYNOW1; + } + + return true; +} + /** * ata_dev_power_set_standby - Set a device power mode to standby * @dev: target device @@ -1988,10 +2017,6 @@ void ata_dev_power_set_standby(struct ata_device *dev) struct ata_taskfile tf; unsigned int err_mask; - /* Issue STANDBY IMMEDIATE command only if supported by the device */ - if (dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC) - return; - /* * Some odd clown BIOSes issue spindown on power off (ACPI S4 or S5) * causing some drives to spin up and down again. For these, do nothing @@ -2005,10 +2030,9 @@ void ata_dev_power_set_standby(struct ata_device *dev) system_entering_hibernation()) return; - ata_tf_init(dev, &tf); - tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; - tf.protocol = ATA_PROT_NODATA; - tf.command = ATA_CMD_STANDBYNOW1; + /* Issue STANDBY IMMEDIATE command only if supported by the device */ + if (!ata_dev_power_init_tf(dev, &tf, false)) + return; ata_dev_notice(dev, "Entering standby power mode\n"); @@ -2038,22 +2062,9 @@ void ata_dev_power_set_active(struct ata_device *dev) * Issue READ VERIFY SECTORS command for 1 sector at lba=0 only * if supported by the device. */ - if (dev->class != ATA_DEV_ATA && dev->class != ATA_DEV_ZAC) + if (!ata_dev_power_init_tf(dev, &tf, true)) return; - ata_tf_init(dev, &tf); - tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; - tf.protocol = ATA_PROT_NODATA; - tf.command = ATA_CMD_VERIFY; - tf.nsect = 1; - if (dev->flags & ATA_DFLAG_LBA) { - tf.flags |= ATA_TFLAG_LBA; - tf.device |= ATA_LBA; - } else { - /* CHS */ - tf.lbal = 0x1; /* sect */ - } - ata_dev_notice(dev, "Entering active power mode\n"); err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0); diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 6850cac803c1..d4e14d052b18 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -1202,7 +1202,6 @@ EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy); static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) { struct scsi_cmnd *scmd = qc->scsicmd; - struct ata_taskfile *tf = &qc->tf; const u8 *cdb = scmd->cmnd; u16 fp; u8 bp = 0xff; @@ -1212,54 +1211,24 @@ static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) goto invalid_fld; } - tf->flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR; - tf->protocol = ATA_PROT_NODATA; - if (cdb[1] & 0x1) { - ; /* ignore IMMED bit, violates sat-r05 */ - } + /* LOEJ bit set not supported */ if (cdb[4] & 0x2) { fp = 4; bp = 1; - goto invalid_fld; /* LOEJ bit set not supported */ + goto invalid_fld; } + + /* Power conditions not supported */ if (((cdb[4] >> 4) & 0xf) != 0) { fp = 4; bp = 3; - goto invalid_fld; /* power conditions not supported */ + goto invalid_fld; } - if (cdb[4] & 0x1) { - tf->nsect = 1; /* 1 sector, lba=0 */ - - if (qc->dev->flags & ATA_DFLAG_LBA) { - tf->flags |= ATA_TFLAG_LBA; - - tf->lbah = 0x0; - tf->lbam = 0x0; - tf->lbal = 0x0; - tf->device |= ATA_LBA; - } else { - /* CHS */ - tf->lbal = 0x1; /* sect */ - tf->lbam = 0x0; /* cyl low */ - tf->lbah = 0x0; /* cyl high */ - } - - tf->command = ATA_CMD_VERIFY; /* READ VERIFY */ - } else { - /* Some odd clown BIOSen issue spindown on power off (ACPI S4 - * or S5) causing some drives to spin up and down again. - */ - if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) && - system_state == SYSTEM_POWER_OFF) - goto skip; - - if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) && - system_entering_hibernation()) - goto skip; - - /* Issue ATA STANDBY IMMEDIATE command */ - tf->command = ATA_CMD_STANDBYNOW1; + /* Ignore IMMED bit (cdb[1] & 0x1), violates sat-r05 */ + if (!ata_dev_power_init_tf(qc->dev, &qc->tf, cdb[4] & 0x1)) { + ata_scsi_set_sense(qc->dev, scmd, ABORTED_COMMAND, 0, 0); + return 1; } /* @@ -1274,12 +1243,8 @@ static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc) invalid_fld: ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp); return 1; - skip: - scmd->result = SAM_STAT_GOOD; - return 1; } - /** * ata_scsi_flush_xlat - Translate SCSI SYNCHRONIZE CACHE command * @qc: Storage for translated ATA taskfile diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h index 05ac80da8ebc..5c685bb1939e 100644 --- a/drivers/ata/libata.h +++ b/drivers/ata/libata.h @@ -62,6 +62,8 @@ extern int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags); extern int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class, unsigned int readid_flags); extern int ata_dev_configure(struct ata_device *dev); +extern bool ata_dev_power_init_tf(struct ata_device *dev, + struct ata_taskfile *tf, bool set_active); extern void ata_dev_power_set_standby(struct ata_device *dev); extern void ata_dev_power_set_active(struct ata_device *dev); extern int sata_down_spd_limit(struct ata_link *link, u32 spd_limit); From patchwork Wed Sep 27 14:18:19 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 726994 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 6CD69E80AAD for ; Wed, 27 Sep 2023 14:19:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232187AbjI0OTX (ORCPT ); Wed, 27 Sep 2023 10:19:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48900 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232117AbjI0OTA (ORCPT ); Wed, 27 Sep 2023 10:19:00 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 574881B7; Wed, 27 Sep 2023 07:18:55 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9A607C433C7; Wed, 27 Sep 2023 14:18:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695824335; bh=HuQHvEmRjsflkMBvRlfx+zSVsAeF4E9Jq7Sw4Ms5+6w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WX8AgOnRlomoaXtAwlQGxgvGTs6jcXZs9RvlFHnz0j6Rq11belZxXUkR1uhEmqMEu klDQxTzC1zNyMKI5g3CCC8VQKPmPTBbW5k00tB3fWh/G20X33/xNhQJpjOkdGUJsAI 2lEAqVcCQ3NiGfF/07vfhUQQVhck0SerGxj2KsbnIKJk/1aGq3tLjvEqfZaXl22FVI TdFbFUU3zixuxTtOFKmb3JU/acEz2v2I38sGTcT8tkFbxZRUQQtIrr8N5eahBTYPyZ Ak/nmbm0pF7LbhLdJCC1ixw1FV3sIX0eo3N63lvs0KZ4Cw4dYQBGmDHXTqWMZoCeQG RVs9mTxp+KIYA== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v8 14/23] ata: libata-core: Synchronize ata_port_detach() with hotplug Date: Wed, 27 Sep 2023 23:18:19 +0900 Message-ID: <20230927141828.90288-15-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230927141828.90288-1-dlemoal@kernel.org> References: <20230927141828.90288-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org The call to async_synchronize_cookie() to synchronize a port removal and hotplug probe is done in ata_host_detach() right before calling ata_port_detach(). Move this call at the beginning of ata_port_detach() to ensure that this operation is always synchronized with probe. Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Tested-by: Chia-Lin Kao (AceLan) Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen --- drivers/ata/libata-core.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 8e326a445765..de661780a31e 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -6065,6 +6065,9 @@ static void ata_port_detach(struct ata_port *ap) struct ata_link *link; struct ata_device *dev; + /* Ensure ata_port probe has completed */ + async_synchronize_cookie(ap->cookie + 1); + /* Wait for any ongoing EH */ ata_port_wait_eh(ap); @@ -6129,11 +6132,8 @@ void ata_host_detach(struct ata_host *host) { int i; - for (i = 0; i < host->n_ports; i++) { - /* Ensure ata_port probe has completed */ - async_synchronize_cookie(host->ports[i]->cookie + 1); + for (i = 0; i < host->n_ports; i++) ata_port_detach(host->ports[i]); - } /* the host is dead now, dissociate ACPI */ ata_acpi_dissociate(host); From patchwork Wed Sep 27 14:18:20 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 728006 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 F0280E80AAF for ; Wed, 27 Sep 2023 14:19:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232195AbjI0OTe (ORCPT ); Wed, 27 Sep 2023 10:19:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53038 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232119AbjI0OTA (ORCPT ); Wed, 27 Sep 2023 10:19:00 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0CE711B9; Wed, 27 Sep 2023 07:18:57 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 518A8C433C8; Wed, 27 Sep 2023 14:18:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695824336; bh=nRftvtXnga/jrlbpRmeNLEXg+UJSvM6XOdo4yjkCmUg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=CECjxo2A5LKcq/lpHQY5PJ/KEs6TxHyOQ9ApPJYmyWAbVH/Nf8EAcrl2O8UIJxSWM yMjy3/sNYFk1+B+n3h+mp7mly3P3yRLCuVJmwMTZ8lAnuT57K8+dC2HWP0vgHYr4Fx 7F2o2wuB/adssKKOoDDkllUKw7/9gvqUA4Ydib2D3/GLedHWb430eYhl7l7P+n2UYf FHgIO2dpvtplabfD07vYIBDiuuBsYzKfjg2tfE2p6pnpD6u6jeIgk5OfqCqDHVOSRS QJn/sW3P4ZS6QDgzu+oXv1KAiJvtI6stq2LEJDFBMqm0D0m6VzjfmjmxmkSMmBKI35 fdtcKmJW/VgfQ== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v8 15/23] ata: libata-core: Detach a port devices on shutdown Date: Wed, 27 Sep 2023 23:18:20 +0900 Message-ID: <20230927141828.90288-16-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230927141828.90288-1-dlemoal@kernel.org> References: <20230927141828.90288-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Modify ata_pci_shutdown_one() to schedule EH to unload a port devices before freezing and thawing the port. This ensures that drives are cleanly disabled and transitioned to standby power mode when a PCI adapter is removed or the system is powered off. Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Tested-by: Chia-Lin Kao (AceLan) Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen --- drivers/ata/libata-core.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index de661780a31e..6b38ebaad019 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -6164,10 +6164,24 @@ EXPORT_SYMBOL_GPL(ata_pci_remove_one); void ata_pci_shutdown_one(struct pci_dev *pdev) { struct ata_host *host = pci_get_drvdata(pdev); + struct ata_port *ap; + unsigned long flags; int i; + /* Tell EH to disable all devices */ for (i = 0; i < host->n_ports; i++) { - struct ata_port *ap = host->ports[i]; + ap = host->ports[i]; + spin_lock_irqsave(ap->lock, flags); + ap->pflags |= ATA_PFLAG_UNLOADING; + ata_port_schedule_eh(ap); + spin_unlock_irqrestore(ap->lock, flags); + } + + for (i = 0; i < host->n_ports; i++) { + ap = host->ports[i]; + + /* Wait for EH to complete before freezing the port */ + ata_port_wait_eh(ap); ap->pflags |= ATA_PFLAG_FROZEN; From patchwork Wed Sep 27 14:18:21 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 726993 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 58E99E80AB1 for ; Wed, 27 Sep 2023 14:19:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232200AbjI0OTg (ORCPT ); Wed, 27 Sep 2023 10:19:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48846 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232100AbjI0OTB (ORCPT ); Wed, 27 Sep 2023 10:19:01 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B487F1BD; Wed, 27 Sep 2023 07:18:58 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 065B9C433C9; Wed, 27 Sep 2023 14:18:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695824338; bh=WrQnUDqGdBfHxfyHbGXnZd/U0ECxKurpC+XZ4MifIbo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lfd35k/GPTaLrYTvoBWHvN1uCPrx3/5WO7Py4acplfHnv5f5VaaXomlx3Ha8IaD9r RbK72tasWFt5Rncw6Fs32GRmyzftYEB5OYtEl2BVgkFBWcy92b1h94NBEFQwUccoMQ n5mI1OooL7OvTsNHgrTRuikuXgrLe2Y+CH7vP/Iv/6oyoAOo2ijzDTWcXfIpN91/Al 3XIhtn3ITGOX9kGiLLDcpZkIkkjuvl/JshThc1naybCnLjmsnXfHP20I+7O9yZUwdL VaNWbfxt05Yx0bWzq8I8lvNm6TzBzgPWSeuHEe3EvWnlgs+8QuZ1DC1J/j5QXCZLN2 /DsadIPjX093Q== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v8 16/23] ata: libata-core: Remove ata_port_suspend_async() Date: Wed, 27 Sep 2023 23:18:21 +0900 Message-ID: <20230927141828.90288-17-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230927141828.90288-1-dlemoal@kernel.org> References: <20230927141828.90288-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org ata_port_suspend_async() is only called by ata_sas_port_suspend(). Modify ata_port_suspend() with an additional bool argument indicating an asynchronous or synchronous suspend to allow removing that helper function. With this change, the variable ata_port_resume_ehi can also be removed and its value (ATA_EHI_XXX flags passed directly to ata_port_request_pm(). Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Tested-by: Chia-Lin Kao (AceLan) Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen --- drivers/ata/libata-core.c | 46 +++++++++++++++------------------------ 1 file changed, 17 insertions(+), 29 deletions(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 6b38ebaad019..291fc686ff08 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -5166,18 +5166,8 @@ static void ata_port_request_pm(struct ata_port *ap, pm_message_t mesg, ata_port_wait_eh(ap); } -/* - * On some hardware, device fails to respond after spun down for suspend. As - * the device won't be used before being resumed, we don't need to touch the - * device. Ask EH to skip the usual stuff and proceed directly to suspend. - * - * http://thread.gmane.org/gmane.linux.ide/46764 - */ -static const unsigned int ata_port_suspend_ehi = ATA_EHI_QUIET - | ATA_EHI_NO_AUTOPSY - | ATA_EHI_NO_RECOVERY; - -static void ata_port_suspend(struct ata_port *ap, pm_message_t mesg) +static void ata_port_suspend(struct ata_port *ap, pm_message_t mesg, + bool async) { /* * We are about to suspend the port, so we do not care about @@ -5187,20 +5177,18 @@ static void ata_port_suspend(struct ata_port *ap, pm_message_t mesg) */ cancel_delayed_work_sync(&ap->scsi_rescan_task); - ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, false); -} - -static void ata_port_suspend_async(struct ata_port *ap, pm_message_t mesg) -{ /* - * We are about to suspend the port, so we do not care about - * scsi_rescan_device() calls scheduled by previous resume operations. - * The next resume will schedule the rescan again. So cancel any rescan - * that is not done yet. + * On some hardware, device fails to respond after spun down for + * suspend. As the device will not be used until being resumed, we + * do not need to touch the device. Ask EH to skip the usual stuff + * and proceed directly to suspend. + * + * http://thread.gmane.org/gmane.linux.ide/46764 */ - cancel_delayed_work_sync(&ap->scsi_rescan_task); - - ata_port_request_pm(ap, mesg, 0, ata_port_suspend_ehi, true); + ata_port_request_pm(ap, mesg, 0, + ATA_EHI_QUIET | ATA_EHI_NO_AUTOPSY | + ATA_EHI_NO_RECOVERY, + async); } static int ata_port_pm_suspend(struct device *dev) @@ -5210,7 +5198,7 @@ static int ata_port_pm_suspend(struct device *dev) if (pm_runtime_suspended(dev)) return 0; - ata_port_suspend(ap, PMSG_SUSPEND); + ata_port_suspend(ap, PMSG_SUSPEND, false); return 0; } @@ -5221,13 +5209,13 @@ static int ata_port_pm_freeze(struct device *dev) if (pm_runtime_suspended(dev)) return 0; - ata_port_suspend(ap, PMSG_FREEZE); + ata_port_suspend(ap, PMSG_FREEZE, false); return 0; } static int ata_port_pm_poweroff(struct device *dev) { - ata_port_suspend(to_ata_port(dev), PMSG_HIBERNATE); + ata_port_suspend(to_ata_port(dev), PMSG_HIBERNATE, false); return 0; } @@ -5279,7 +5267,7 @@ static int ata_port_runtime_idle(struct device *dev) static int ata_port_runtime_suspend(struct device *dev) { - ata_port_suspend(to_ata_port(dev), PMSG_AUTO_SUSPEND); + ata_port_suspend(to_ata_port(dev), PMSG_AUTO_SUSPEND, false); return 0; } @@ -5309,7 +5297,7 @@ static const struct dev_pm_ops ata_port_pm_ops = { */ void ata_sas_port_suspend(struct ata_port *ap) { - ata_port_suspend_async(ap, PMSG_SUSPEND); + ata_port_suspend(ap, PMSG_SUSPEND, true); } EXPORT_SYMBOL_GPL(ata_sas_port_suspend); From patchwork Wed Sep 27 14:18:22 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 728005 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 722F5E80AB2 for ; Wed, 27 Sep 2023 14:19:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232210AbjI0OTp (ORCPT ); Wed, 27 Sep 2023 10:19:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48902 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232114AbjI0OTB (ORCPT ); Wed, 27 Sep 2023 10:19:01 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6F8A2198; Wed, 27 Sep 2023 07:19:00 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id AFB25C433C8; Wed, 27 Sep 2023 14:18:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695824340; bh=tIQ/APgi+9Mtiz/2aAn4OUJwm8gHKymE8WJyLlZD5/s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=i4gX7ZsA53hoaNb4FF5UjmcTPgbuSTttzT1QAWVOioLryzdI3OFxuqH79QptBvPeY NVbcvZz54H8iipKVYpJNncfI5nkA9uKblSy8EGKQvUsQXuEEgQ7It3HRnUTdwTLIBp Y78/1CcAdBI2hQsACd0HizN3lj3Y8i3PMK3/HZdkMc9xnjIHYclJjgj1lTtc3zf9kI uP4uiOIKCDa+GXLXiX4EhmYl0rW3gch6LNWq0+oyUFpeRqxKFpBNifzDo/9cmxUeal TBIsPneNDOmmb7gFhu+cy40W70cywdjhHTiV4Cx5ES2iWL8/AfSYGtq8HYvoW0Qa6c NDWKtAtGHiY4g== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v8 17/23] ata: libata-core: Remove ata_port_resume_async() Date: Wed, 27 Sep 2023 23:18:22 +0900 Message-ID: <20230927141828.90288-18-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230927141828.90288-1-dlemoal@kernel.org> References: <20230927141828.90288-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Remove ata_port_resume_async() and replace it with a modified ata_port_resume() taking an additional bool argument indicating if ata EH resume operation should be executed synchronously or asynchronously. With this change, the variable ata_port_resume_ehi is not longer necessary and its value (ATA_EHI_XXX flags) passed directly to ata_port_request_pm(). Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Tested-by: Chia-Lin Kao (AceLan) Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen --- drivers/ata/libata-core.c | 21 ++++++++------------- 1 file changed, 8 insertions(+), 13 deletions(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 291fc686ff08..6773a1e52dad 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -5219,22 +5219,17 @@ static int ata_port_pm_poweroff(struct device *dev) return 0; } -static const unsigned int ata_port_resume_ehi = ATA_EHI_NO_AUTOPSY - | ATA_EHI_QUIET; - -static void ata_port_resume(struct ata_port *ap, pm_message_t mesg) +static void ata_port_resume(struct ata_port *ap, pm_message_t mesg, + bool async) { - ata_port_request_pm(ap, mesg, ATA_EH_RESET, ata_port_resume_ehi, false); -} - -static void ata_port_resume_async(struct ata_port *ap, pm_message_t mesg) -{ - ata_port_request_pm(ap, mesg, ATA_EH_RESET, ata_port_resume_ehi, true); + ata_port_request_pm(ap, mesg, ATA_EH_RESET, + ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, + async); } static int ata_port_pm_resume(struct device *dev) { - ata_port_resume_async(to_ata_port(dev), PMSG_RESUME); + ata_port_resume(to_ata_port(dev), PMSG_RESUME, true); pm_runtime_disable(dev); pm_runtime_set_active(dev); pm_runtime_enable(dev); @@ -5273,7 +5268,7 @@ static int ata_port_runtime_suspend(struct device *dev) static int ata_port_runtime_resume(struct device *dev) { - ata_port_resume(to_ata_port(dev), PMSG_AUTO_RESUME); + ata_port_resume(to_ata_port(dev), PMSG_AUTO_RESUME, false); return 0; } @@ -5303,7 +5298,7 @@ EXPORT_SYMBOL_GPL(ata_sas_port_suspend); void ata_sas_port_resume(struct ata_port *ap) { - ata_port_resume_async(ap, PMSG_RESUME); + ata_port_resume(ap, PMSG_RESUME, true); } EXPORT_SYMBOL_GPL(ata_sas_port_resume); From patchwork Wed Sep 27 14:18:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 726992 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 12012E80AB3 for ; Wed, 27 Sep 2023 14:19:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232230AbjI0OTq (ORCPT ); Wed, 27 Sep 2023 10:19:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57726 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232129AbjI0OTC (ORCPT ); Wed, 27 Sep 2023 10:19:02 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1D862F9; Wed, 27 Sep 2023 07:19:02 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6409DC433C7; Wed, 27 Sep 2023 14:19:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695824341; bh=qrUl5SH+B8SP/ZoBFwIfkCLObB6aWz8x19i2XQMuplw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=c4NAURG+a151LZ51OuLGoOM1Pgr0A/PNTOrCRzcfx6rIY/3BtNgtfaXV1LYoi6KCq Au7wv3pLouCSwnj6OgSckceTcgGq2BEXGO6pHrNxOI2aKT9wAKq5lwAUKl/Tf5plEF eIuvJzRnRKEx0BchFF6H/NHy+qBYYQ4nrx9cmynPrnNM/Hm7TpOL8P/TGDkwwGdZ/6 nbDE69sq26VZ1Jg+bWOC1A1hfkRRUVx6uF1LhxqDLrMyQH4KVQPVwJyxeX2XWZcacL pbOo6genuUSBklAHdVFwF4Uyq6zI76GUZjtF4TE0HqR9ZYdawKC2vX0wDj/MsG1d8g LfnRc3ABUkoxQ== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v8 18/23] ata: libata-core: Do not poweroff runtime suspended ports Date: Wed, 27 Sep 2023 23:18:23 +0900 Message-ID: <20230927141828.90288-19-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230927141828.90288-1-dlemoal@kernel.org> References: <20230927141828.90288-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org When powering off, there is no need to suspend a port that has already been runtime suspended. Skip the EH PM request in ata_port_pm_poweroff() in this case. Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Tested-by: Chia-Lin Kao (AceLan) Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen --- drivers/ata/libata-core.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index 6773a1e52dad..df6ed386e6fc 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -5215,7 +5215,8 @@ static int ata_port_pm_freeze(struct device *dev) static int ata_port_pm_poweroff(struct device *dev) { - ata_port_suspend(to_ata_port(dev), PMSG_HIBERNATE, false); + if (!pm_runtime_suspended(dev)) + ata_port_suspend(to_ata_port(dev), PMSG_HIBERNATE, false); return 0; } From patchwork Wed Sep 27 14:18:24 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 728004 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 4CDD9E80AB6 for ; Wed, 27 Sep 2023 14:19:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232231AbjI0OTr (ORCPT ); Wed, 27 Sep 2023 10:19:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53068 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232153AbjI0OTF (ORCPT ); Wed, 27 Sep 2023 10:19:05 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C82B912A; Wed, 27 Sep 2023 07:19:03 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1A64EC433C8; Wed, 27 Sep 2023 14:19:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695824343; bh=R1tYu+zCjKRGxXsPNNRChzgkkzMhM2utM9Va0s9nexk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PUYHVpyfvSnS40OV7ujzUUWs1NNnTdFERjVV+dfpdgjuo741w80ZIvnhHiOJeq9Py hGc/6H5B8qBn6h8NQOE3BzRTNvYf2ct1o21vxvm64DlYW/jZrpDBSO86h8/zYE8qW6 hslwikUCqOEM+IHszk3y87vkxXdlk5IJOUDL4cOwj1BRlFvV6I1aauYg7770MGmuFl 52B5RiY/BUbxzffVNYSueH0ScfZDkJ5IDy7xJ/dSGl5ta2A3FHbjfz/oJfHs9+nT6Q PepkjZirRlZKyOV38PR5gWHx0zy7HUQJefPXpz1n8jI3pTDID1HGuUX09SKLFArZIB oAQzbFmn9iftQ== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v8 19/23] ata: libata-core: Do not resume runtime suspended ports Date: Wed, 27 Sep 2023 23:18:24 +0900 Message-ID: <20230927141828.90288-20-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230927141828.90288-1-dlemoal@kernel.org> References: <20230927141828.90288-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org The scsi disk driver does not resume disks that have been runtime suspended by the user. To be consistent with this behavior, do the same for ata ports and skip the PM request in ata_port_pm_resume() if the port was already runtime suspended. With this change, it is no longer necessary to force the PM state of the port to ACTIVE as the PM core code will take care of that when handling runtime resume. Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Tested-by: Chia-Lin Kao (AceLan) Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen --- drivers/ata/libata-core.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index df6ed386e6fc..58f03031a259 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -5230,10 +5230,8 @@ static void ata_port_resume(struct ata_port *ap, pm_message_t mesg, static int ata_port_pm_resume(struct device *dev) { - ata_port_resume(to_ata_port(dev), PMSG_RESUME, true); - pm_runtime_disable(dev); - pm_runtime_set_active(dev); - pm_runtime_enable(dev); + if (!pm_runtime_suspended(dev)) + ata_port_resume(to_ata_port(dev), PMSG_RESUME, true); return 0; } From patchwork Wed Sep 27 14:18:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 726991 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 77D40E80AB7 for ; Wed, 27 Sep 2023 14:19:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232236AbjI0OTs (ORCPT ); Wed, 27 Sep 2023 10:19:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51522 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232154AbjI0OTG (ORCPT ); Wed, 27 Sep 2023 10:19:06 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7C6E7139; Wed, 27 Sep 2023 07:19:05 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C3A7BC433CA; Wed, 27 Sep 2023 14:19:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695824345; bh=B/LOcvpJHNZI8Taj8thEnE9tb7Zy6HMTbO08wRi1qFA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=k/X/ytEM8TUUL5jocOL6Sdg4in+cWCxzJ5dH6ogO/3p9FAgfFmXLSTBLl+Ur7wrX7 1GB+++azqgU6RrbqknUhT3lQihHBuX2hbz5dzdmeSDgF4OGWL4ij9e8uXiNcZ400ml gXQD/KHMXWBrbp/0ZmdutgdwoJRLrL2xjgv9jGa1NHMlxwbdoJ/BJjtqFEo29KdG/0 /RrjdfXs6flhLPQAl+hY+h0jIWhBNZ8P0gXSfdpGtlbYK2kghjnCzjkgNpvzUQ3EI3 4lSxMjLDesvd09WJDHSmxvPUFPVUZnYtVHSMnolOpT93a8X0J66wkM0PcjgvwEUpSk Sfk0QAK5uGBYQ== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v8 20/23] ata: libata-sata: Improve ata_sas_slave_configure() Date: Wed, 27 Sep 2023 23:18:25 +0900 Message-ID: <20230927141828.90288-21-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230927141828.90288-1-dlemoal@kernel.org> References: <20230927141828.90288-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Change ata_sas_slave_configure() to return the return value of ata_scsi_dev_config() to ensure that any error from that function is propagated to libsas. Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Reviewed-by: John Garry Tested-by: Chia-Lin Kao (AceLan) Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen --- drivers/ata/libata-sata.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/ata/libata-sata.c b/drivers/ata/libata-sata.c index a701e1538482..83a9497e48e1 100644 --- a/drivers/ata/libata-sata.c +++ b/drivers/ata/libata-sata.c @@ -1182,8 +1182,8 @@ EXPORT_SYMBOL_GPL(ata_sas_tport_delete); int ata_sas_slave_configure(struct scsi_device *sdev, struct ata_port *ap) { ata_scsi_sdev_config(sdev); - ata_scsi_dev_config(sdev, ap->link.device); - return 0; + + return ata_scsi_dev_config(sdev, ap->link.device); } EXPORT_SYMBOL_GPL(ata_sas_slave_configure); From patchwork Wed Sep 27 14:18:26 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 728003 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 ABC61E80AB9 for ; Wed, 27 Sep 2023 14:19:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232237AbjI0OTt (ORCPT ); Wed, 27 Sep 2023 10:19:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51550 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232159AbjI0OTK (ORCPT ); Wed, 27 Sep 2023 10:19:10 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3647619A; Wed, 27 Sep 2023 07:19:07 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 78D48C433C8; Wed, 27 Sep 2023 14:19:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695824346; bh=ivSqt8eYECZ8WOxEKDAq1kGxxTWXRhFriR2bEOYAGzA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aTRZCKwBLcsiaL4Tik8f751GM38ajk4zuqBWHA6SBC+Lju3ZGYL45PiWe1k9Ockbl r/wl51sounotTPX/07PAG50xwxcw0NNWwaZEeTpulW4y4FZ+CAFmJsKHUE5l+yDEmK Uh6Ucxe4Jqz6HnAP8YVM7ErX77/M4T2f39cPjl4xHY4x07O0ruCC+srOHJp0ojnpiD dGOG7+J2UDlTF2L+xH3M8+YFGS7y9D7LlyQsXpeZbdmuvjHgNoZ3gL/pXVduVx0Fop Aw+youhSfP7TeyU4QjbP9wG0mkORQqQlATMR/kf1j1amAMs6gBO4iAdRiGlDHVTWmS ymY63Xsgu8G+w== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v8 21/23] ata: libata-eh: Improve reset error messages Date: Wed, 27 Sep 2023 23:18:26 +0900 Message-ID: <20230927141828.90288-22-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230927141828.90288-1-dlemoal@kernel.org> References: <20230927141828.90288-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Some drives are really slow to spinup on resume, resulting is a very slow response to COMRESET and to error messages such as: ata1: COMRESET failed (errno=-16) ata1: link is slow to respond, please be patient (ready=0) ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300) ata1.00: configured for UDMA/133 Given that the slowness of the response is indicated with the message "link is slow to respond..." and that resets are retried until the device is detected as online after up to 1min (ata_eh_reset_timeouts), there is no point in printing the "COMRESET failed" error message. Let's not scare the user with non fatal errors and only warn about reset failures in ata_eh_reset() when all reset retries have been exhausted. Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Tested-by: Chia-Lin Kao (AceLan) Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen --- drivers/ata/libata-eh.c | 2 ++ drivers/ata/libata-sata.c | 1 - 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index 5686353e442c..67387d602735 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -2909,6 +2909,8 @@ int ata_eh_reset(struct ata_link *link, int classify, */ if (ata_is_host_link(link)) ata_eh_thaw_port(ap); + ata_link_warn(link, "%s failed\n", + reset == hardreset ? "hardreset" : "softreset"); goto out; } diff --git a/drivers/ata/libata-sata.c b/drivers/ata/libata-sata.c index 83a9497e48e1..b6656c287175 100644 --- a/drivers/ata/libata-sata.c +++ b/drivers/ata/libata-sata.c @@ -621,7 +621,6 @@ int sata_link_hardreset(struct ata_link *link, const unsigned int *timing, /* online is set iff link is online && reset succeeded */ if (online) *online = false; - ata_link_err(link, "COMRESET failed (errno=%d)\n", rc); } return rc; } From patchwork Wed Sep 27 14:18:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 726990 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 D8EC0E80AAD for ; Wed, 27 Sep 2023 14:19:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232241AbjI0OTu (ORCPT ); Wed, 27 Sep 2023 10:19:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51554 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232160AbjI0OTK (ORCPT ); Wed, 27 Sep 2023 10:19:10 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DA69019E; Wed, 27 Sep 2023 07:19:08 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2D204C433CA; Wed, 27 Sep 2023 14:19:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695824348; bh=zkev2ircY3fnbSzJ0bCWRHN59K1mwL4l6wGAngimylw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZzvlAwZm4NiejxsJdlpgf15l85QOtigN3u53YlIJWuW5sUkHydiryIAXac8SqzFw6 I/Rfydc6n33KylwgPggKT0ad5ze7nHLsTgQkxqTCJDRADmU/HdiAfzjn0kFF6O7YyH tPA/6g4QG+rXWlaQVkuAmWUtcfu67LfAlu/TcUv0VUMHLqU7i9cO93p8n/hOzGd8c7 urwLm7aDMMcYMBEf9+l2a2J+4hTfxoJYZyPm34e1DGtmgbZJhoTvZidiZ9n407rdxh nR9LkuexkTK9zrjx9NVeIkPdEW9qNXGSEN61MasnlsM1x6hCyygmppgLiMYUJcS6xH t+RGjlwbrtqrA== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v8 22/23] ata: libata-eh: Reduce "disable device" message verbosity Date: Wed, 27 Sep 2023 23:18:27 +0900 Message-ID: <20230927141828.90288-23-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230927141828.90288-1-dlemoal@kernel.org> References: <20230927141828.90288-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org There is no point in warning about a device being disabled when we expect it to be, that is, on suspend, shutdown or when detaching the device. Suppress the message "disable device" for these cases by introducing the EH static function ata_eh_dev_disable() and by using it in ata_eh_unload() and ata_eh_detach_dev(). ata_dev_disable() code is modified to call this new function after printing the "disable device" message. Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Tested-by: Chia-Lin Kao (AceLan) Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen --- drivers/ata/libata-eh.c | 32 +++++++++++++++++++------------- 1 file changed, 19 insertions(+), 13 deletions(-) diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index 67387d602735..945675f6b822 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -494,6 +494,18 @@ void ata_eh_release(struct ata_port *ap) mutex_unlock(&ap->host->eh_mutex); } +static void ata_eh_dev_disable(struct ata_device *dev) +{ + ata_acpi_on_disable(dev); + ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | ATA_DNXFER_QUIET); + dev->class++; + + /* From now till the next successful probe, ering is used to + * track probe failures. Clear accumulated device error info. + */ + ata_ering_clear(&dev->ering); +} + static void ata_eh_unload(struct ata_port *ap) { struct ata_link *link; @@ -517,8 +529,8 @@ static void ata_eh_unload(struct ata_port *ap) */ ata_for_each_link(link, ap, PMP_FIRST) { sata_scr_write(link, SCR_CONTROL, link->saved_scontrol & 0xff0); - ata_for_each_dev(dev, link, ALL) - ata_dev_disable(dev); + ata_for_each_dev(dev, link, ENABLED) + ata_eh_dev_disable(dev); } /* freeze and set UNLOADED */ @@ -1211,14 +1223,8 @@ void ata_dev_disable(struct ata_device *dev) return; ata_dev_warn(dev, "disable device\n"); - ata_acpi_on_disable(dev); - ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | ATA_DNXFER_QUIET); - dev->class++; - /* From now till the next successful probe, ering is used to - * track probe failures. Clear accumulated device error info. - */ - ata_ering_clear(&dev->ering); + ata_eh_dev_disable(dev); } EXPORT_SYMBOL_GPL(ata_dev_disable); @@ -1240,12 +1246,12 @@ void ata_eh_detach_dev(struct ata_device *dev) /* * If the device is still enabled, transition it to standby power mode - * (i.e. spin down HDDs). + * (i.e. spin down HDDs) and disable it. */ - if (ata_dev_enabled(dev)) + if (ata_dev_enabled(dev)) { ata_dev_power_set_standby(dev); - - ata_dev_disable(dev); + ata_eh_dev_disable(dev); + } spin_lock_irqsave(ap->lock, flags); From patchwork Wed Sep 27 14:18:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 728002 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 93B85E80AB4 for ; Wed, 27 Sep 2023 14:19:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232245AbjI0OTw (ORCPT ); Wed, 27 Sep 2023 10:19:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48876 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232165AbjI0OTU (ORCPT ); Wed, 27 Sep 2023 10:19:20 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8CACC1B0; Wed, 27 Sep 2023 07:19:10 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D5648C433C9; Wed, 27 Sep 2023 14:19:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1695824350; bh=53d3ZPKvrChRMkkJyJG5wwgMC5g/WRn51TobyMswQos=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lPsKmLdpqmMfcIQMyBNccQipN2qfIVTkVuMY6DAVPTGYUrz99wDWLnin5JCn9DZB2 zIhFfoskhLaKPyyiNUSQ7ut1imyFrs0mCetvRAsaWOuWICwrfx2Ht5ZlmzVARa9+AV O76WNMf+M0HOkUpdFYd9K6b6QStCKdOaGgM4s6bIGclBoZ3bmObBV5hEhHPGmALX9x GO02JjX8xXHJzAsIin7c7ZQTHiBJXSBSg7EXSF5YXz4zJ1TIBxSZ8t+8YHMCxqURGD 9wqgiAxFpQ1/fT5m69SKZXcvMv6Ha8aMS/2uKMsH/sQmy6rMumlvT9JjD/DmQH7PCK IUDVu4xOwrTWA== From: Damien Le Moal To: linux-ide@vger.kernel.org Cc: linux-scsi@vger.kernel.org, "Martin K . Petersen" , John Garry , Rodrigo Vivi , Paul Ausbeck , Kai-Heng Feng , Joe Breuer , Geert Uytterhoeven , Chia-Lin Kao Subject: [PATCH v8 23/23] ata: libata: Cleanup inline DMA helper functions Date: Wed, 27 Sep 2023 23:18:28 +0900 Message-ID: <20230927141828.90288-24-dlemoal@kernel.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230927141828.90288-1-dlemoal@kernel.org> References: <20230927141828.90288-1-dlemoal@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Simplify the inline DMA helper functions ata_using_mwdma(), ata_using_udma() and ata_dma_enabled() to directly return as a boolean the result of their test condition. Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Tested-by: Chia-Lin Kao (AceLan) Tested-by: Geert Uytterhoeven Reviewed-by: Martin K. Petersen --- include/linux/libata.h | 18 ++++++++---------- 1 file changed, 8 insertions(+), 10 deletions(-) diff --git a/include/linux/libata.h b/include/linux/libata.h index 00b4a2b7819a..3c0fd04b0035 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -1881,23 +1881,21 @@ static inline unsigned long ata_deadline(unsigned long from_jiffies, change in future hardware and specs, secondly 0xFF means 'no DMA' but is > UDMA_0. Dyma ddreigiau */ -static inline int ata_using_mwdma(struct ata_device *adev) +static inline bool ata_using_mwdma(struct ata_device *adev) { - if (adev->dma_mode >= XFER_MW_DMA_0 && adev->dma_mode <= XFER_MW_DMA_4) - return 1; - return 0; + return adev->dma_mode >= XFER_MW_DMA_0 && + adev->dma_mode <= XFER_MW_DMA_4; } -static inline int ata_using_udma(struct ata_device *adev) +static inline bool ata_using_udma(struct ata_device *adev) { - if (adev->dma_mode >= XFER_UDMA_0 && adev->dma_mode <= XFER_UDMA_7) - return 1; - return 0; + return adev->dma_mode >= XFER_UDMA_0 && + adev->dma_mode <= XFER_UDMA_7; } -static inline int ata_dma_enabled(struct ata_device *adev) +static inline bool ata_dma_enabled(struct ata_device *adev) { - return (adev->dma_mode == 0xFF ? 0 : 1); + return adev->dma_mode != 0xFF; } /**************************************************************************