From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3BFC0F9C3; Wed, 6 Mar 2024 00:01:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709683305; cv=none; b=nB5HEgk2KsLKIwfn1rlwPaw9TP5pvLb2PUfNdYFaHsEMXJlOXVMQldIMBRWbJ07cCTlGAw9Tf1hAnMzZoHji5zvEbgR/byra5qCy714I7dMtNYq3bzQ16b8IbRzKUXOKqh22UrJOZ7Y3dSZYgoD4kKrW9PrI1+WeJv55EoEd2Ks= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709683305; c=relaxed/simple; bh=WYBjKej7NZSY4d7Ug+nci7vzA3FkIwnYIKYcwGC3vAo=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=BqcR6CdT3uAbmLPHxdHC8qSeVrEq9dQtzv+ddnIVivzh92snujy75f20m5RbURpvD4wfcgL+tD24x6ZJndoXeECa5QY2/CxGIFvbXMka9sjFmnwlQruTz028o9mhYZOGAQeW4OY17zvvvz9Te0secjt8iTkdLCAXrhhlssqM4sI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=biM6eTtE; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="biM6eTtE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A6341C433C7; Wed, 6 Mar 2024 00:01:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1709683304; bh=WYBjKej7NZSY4d7Ug+nci7vzA3FkIwnYIKYcwGC3vAo=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=biM6eTtEeCmerE1srVIhNPcKV3NAGA0HmOVWqhxCYxLnKUwKEF91t/qLZ4Xb0JEpA nSRxoxWZaOph6fZIjKDU1+hVEqg24tbEwx59pCpAxgjilFhPI89wlJZAdX3uE0Rydy xOzrTtib8i5fQw1nIf+PIkmJiNYuYdz64E4BZWtpQqTglI02mKxMmaGZQQTgoJCLOB aGqFR4qUcEqIZOdFZugHmer2ab+JnW9m9OhFrFAm6YFDzObE6nbZo3Bp2YCXB3lAV/ aWPNcqswb1WdDjqX+X4hlpr6dV2adNA75HRIZNlZoIV8VqyMCasQnN5ItDOq6/6EPC 5mdlb8224JO9w== Message-ID: Date: Wed, 6 Mar 2024 09:01:41 +0900 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v6 2/7] scsi: libsas: Define NCQ Priority sysfs attributes for SATA devices Content-Language: en-US To: Igor Pylypiv , Niklas Cassel , John Garry , Jason Yan , "James E.J. Bottomley" , "Martin K. Petersen" , Jack Wang , Hannes Reinecke , Xiang Chen , Artur Paszkiewicz , Bart Van Assche Cc: TJ Adams , linux-ide@vger.kernel.org, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org References: <20240305235823.3308225-1-ipylypiv@google.com> <20240305235823.3308225-3-ipylypiv@google.com> From: Damien Le Moal Organization: Western Digital Research In-Reply-To: <20240305235823.3308225-3-ipylypiv@google.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 3/6/24 08:58, Igor Pylypiv wrote: > Libata sysfs attributes cannot be used for libsas managed SATA devices > because the ata_port location is different for libsas. > > Defined sysfs attributes (visible for SATA devices only): > - /sys/block/sda/device/ncq_prio_enable > - /sys/block/sda/device/ncq_prio_supported > > The newly defined attributes will pass the correct ata_port to libata > helper functions. > > Reviewed-by: John Garry > Reviewed-by: Damien Le Moal > Reviewed-by: Jason Yan > Signed-off-by: Igor Pylypiv > --- > drivers/scsi/libsas/sas_ata.c | 94 +++++++++++++++++++++++++++++++++++ > include/scsi/sas_ata.h | 6 +++ > 2 files changed, 100 insertions(+) > > diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c > index 12e2653846e3..04b0bd9a4e01 100644 > --- a/drivers/scsi/libsas/sas_ata.c > +++ b/drivers/scsi/libsas/sas_ata.c > @@ -964,3 +964,97 @@ int sas_execute_ata_cmd(struct domain_device *device, u8 *fis, int force_phy_id) > force_phy_id, &tmf_task); > } > EXPORT_SYMBOL_GPL(sas_execute_ata_cmd); > + > +static ssize_t sas_ncq_prio_supported_show(struct device *device, > + struct device_attribute *attr, > + char *buf) > +{ > + struct scsi_device *sdev = to_scsi_device(device); > + struct domain_device *ddev = sdev_to_domain_dev(sdev); > + bool supported; > + int rc; > + > + /* This attribute shall be visible for SATA devices only */ > + if (WARN_ON_ONCE(!dev_is_sata(ddev))) > + return -EINVAL; > + > + rc = ata_ncq_prio_supported(ddev->sata_dev.ap, sdev, &supported); > + if (rc) > + return rc; > + > + return sysfs_emit(buf, "%d\n", supported); > +} > + > +DEVICE_ATTR(ncq_prio_supported, S_IRUGO, sas_ncq_prio_supported_show, NULL); > + > +static ssize_t sas_ncq_prio_enable_show(struct device *device, > + struct device_attribute *attr, > + char *buf) > +{ > + struct scsi_device *sdev = to_scsi_device(device); > + struct domain_device *ddev = sdev_to_domain_dev(sdev); > + bool enabled; > + int rc; > + > + /* This attribute shall be visible for SATA devices only */ > + if (WARN_ON_ONCE(!dev_is_sata(ddev))) > + return -EINVAL; > + > + rc = ata_ncq_prio_enabled(ddev->sata_dev.ap, sdev, &enabled); > + if (rc) > + return rc; > + > + return sysfs_emit(buf, "%d\n", enabled); > +} > + > +static ssize_t sas_ncq_prio_enable_store(struct device *device, > + struct device_attribute *attr, > + const char *buf, size_t len) > +{ > + struct scsi_device *sdev = to_scsi_device(device); > + struct domain_device *ddev = sdev_to_domain_dev(sdev); > + bool enable; > + int rc; > + > + /* This attribute shall be visible for SATA devices only */ > + if (WARN_ON_ONCE(!dev_is_sata(ddev))) > + return -EINVAL; > + > + rc = kstrtobool(buf, &enable); > + if (rc) > + return rc; > + > + rc = ata_ncq_prio_enable(ddev->sata_dev.ap, sdev, enable); > + if (rc) > + return rc; > + > + return len; > +} > + > +DEVICE_ATTR(ncq_prio_enable, S_IRUGO | S_IWUSR, > + sas_ncq_prio_enable_show, sas_ncq_prio_enable_store); > + > +static struct attribute *sas_ata_sdev_attrs[] = { > + &dev_attr_ncq_prio_supported.attr, > + &dev_attr_ncq_prio_enable.attr, > + NULL > +}; > + > +static umode_t sas_ata_attr_is_visible(struct kobject *kobj, > + struct attribute *attr, int i) > +{ > + struct device *dev = kobj_to_dev(kobj); > + struct scsi_device *sdev = to_scsi_device(dev); > + struct domain_device *ddev = sdev_to_domain_dev(sdev); > + > + if (!dev_is_sata(ddev)) > + return 0; > + > + return attr->mode; > +} > + > +const struct attribute_group sas_ata_sdev_attr_group = { > + .attrs = sas_ata_sdev_attrs, > + .is_visible = sas_ata_attr_is_visible, > +}; > +EXPORT_SYMBOL_GPL(sas_ata_sdev_attr_group); > diff --git a/include/scsi/sas_ata.h b/include/scsi/sas_ata.h > index 2f8c719840a6..59a75cd8b5e0 100644 > --- a/include/scsi/sas_ata.h > +++ b/include/scsi/sas_ata.h > @@ -39,6 +39,8 @@ int smp_ata_check_ready_type(struct ata_link *link); > int sas_discover_sata(struct domain_device *dev); > int sas_ata_add_dev(struct domain_device *parent, struct ex_phy *phy, > struct domain_device *child, int phy_id); > + > +extern const struct attribute_group sas_ata_sdev_attr_group; > #else > > static inline void sas_ata_disabled_notice(void) > @@ -123,6 +125,10 @@ static inline int sas_ata_add_dev(struct domain_device *parent, struct ex_phy *p > sas_ata_disabled_notice(); > return -ENODEV; > } > + > +static const struct attribute_group sas_ata_sdev_attr_group __maybe_unused = { > + .attrs = NULL, > +}; Looks OK, but I must say that I would prefer John's idea with the #define as that removes the variable definition entirely. > #endif > > #endif /* _SAS_ATA_H_ */ -- Damien Le Moal Western Digital Research