From: John Garry <john.garry@huawei.com>
To: <axboe@kernel.dk>, <damien.lemoal@opensource.wdc.com>,
<jejb@linux.ibm.com>, <martin.petersen@oracle.com>,
<jinpu.wang@cloud.ionos.com>, <hare@suse.de>,
<bvanassche@acm.org>, <hch@lst.de>, <ming.lei@redhat.com>,
<niklas.cassel@wdc.com>
Cc: <linux-block@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<linux-ide@vger.kernel.org>, <linux-scsi@vger.kernel.org>,
<linuxarm@huawei.com>, John Garry <john.garry@huawei.com>
Subject: [PATCH RFC v3 14/22] ata: libata-scsi: Add ata_scsi_setup_sdev()
Date: Tue, 25 Oct 2022 18:18:08 +0800 [thread overview]
Message-ID: <1666693096-180008-15-git-send-email-john.garry@huawei.com> (raw)
In-Reply-To: <1666693096-180008-1-git-send-email-john.garry@huawei.com>
Add a function to setup the sdev associated with an ata_device.
Currently in libata to create the sdev we call __scsi_add_device() to
create the sdev and execute the scan. However if we want to move to a
2-step process where we allocate the sdev early in the port probe, then
we need a separate function just to allocate the sdev.
We add a ata_port_operations callback .setup_scsi_device for when the
driver needs a custom setup. This is essentially for libsas, which does
not use the same options for sdev parent and id.
Signed-off-by: John Garry <john.garry@huawei.com>
---
drivers/ata/libata-scsi.c | 26 ++++++++++++++++++++++++++
drivers/ata/libata.h | 1 +
include/linux/libata.h | 2 ++
3 files changed, 29 insertions(+)
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index e2ebb0b065e2..efdba852e363 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -4253,6 +4253,32 @@ static void ata_scsi_assign_ofnode(struct ata_device *dev, struct ata_port *ap)
}
#endif
+int ata_scsi_setup_sdev(struct ata_device *dev)
+{
+ u64 lun = 0;
+ int channel = 0;
+ uint id = 0;
+ struct ata_link *link = dev->link;
+ struct ata_port *ap = link->ap;
+ struct Scsi_Host *shost = ap->scsi_host;
+ struct device *parent = &shost->shost_gendev;
+ struct scsi_device *sdev;
+
+ if (ap->ops->setup_scsi_device)
+ return ap->ops->setup_scsi_device(dev);
+
+ if (ata_is_host_link(link))
+ id = dev->devno;
+ else
+ channel = link->pmp;
+ sdev = scsi_get_dev(parent, channel, id, lun);
+ if (!sdev)
+ return -ENODEV;
+ dev->sdev = sdev;
+ ata_scsi_assign_ofnode(dev, ap);
+ return 0;
+}
+
void ata_scsi_scan_host(struct ata_port *ap, int sync)
{
int tries = 5;
diff --git a/drivers/ata/libata.h b/drivers/ata/libata.h
index 2c5c8273af01..0c2df1e60768 100644
--- a/drivers/ata/libata.h
+++ b/drivers/ata/libata.h
@@ -112,6 +112,7 @@ extern struct ata_device *ata_scsi_find_dev(struct ata_port *ap,
const struct scsi_device *scsidev);
extern int ata_scsi_add_hosts(struct ata_host *host,
struct scsi_host_template *sht);
+extern int ata_scsi_setup_sdev(struct ata_device *dev);
extern void ata_scsi_scan_host(struct ata_port *ap, int sync);
extern int ata_scsi_offline_dev(struct ata_device *dev);
extern void ata_scsi_set_sense(struct ata_device *dev,
diff --git a/include/linux/libata.h b/include/linux/libata.h
index fe990176e6ee..827d5838cd23 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -968,6 +968,8 @@ struct ata_port_operations {
void (*phy_reset)(struct ata_port *ap);
void (*eng_timeout)(struct ata_port *ap);
+ int (*setup_scsi_device)(struct ata_device *dev);
+
/*
* ->inherits must be the last field and all the preceding
* fields must be pointers.
--
2.35.3
next prev parent reply other threads:[~2022-10-25 9:52 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-25 10:17 [PATCH RFC v3 00/22] blk-mq/libata/scsi: SCSI driver tagging improvements Part I John Garry
2022-10-25 10:11 ` John Garry
2022-10-25 10:17 ` [PATCH RFC v3 01/22] blk-mq: Don't get budget for reserved requests John Garry
2022-10-27 1:16 ` Damien Le Moal
2022-10-27 9:09 ` John Garry
2022-10-25 10:17 ` [PATCH RFC v3 02/22] scsi: core: Add scsi_get_dev() John Garry
2022-10-25 10:17 ` [PATCH RFC v3 03/22] scsi: core: Implement reserved command handling John Garry
2022-10-27 1:18 ` Damien Le Moal
2022-10-27 7:51 ` Hannes Reinecke
2022-10-27 8:16 ` John Garry
2022-10-27 9:11 ` John Garry
2022-10-25 10:17 ` [PATCH RFC v3 04/22] scsi: core: Add support to send reserved commands John Garry
2022-10-27 1:21 ` Damien Le Moal
2022-10-27 9:13 ` John Garry
2022-10-27 9:18 ` Damien Le Moal
2022-10-25 10:17 ` [PATCH RFC v3 05/22] scsi: core: Add support for reserved command timeout handling John Garry
2022-10-25 10:18 ` [PATCH RFC v3 06/22] scsi: libsas: Improve sas_ex_discover_expander() error handling John Garry
2022-10-25 10:18 ` [PATCH RFC v3 07/22] scsi: libsas: Notify LLDD expander found before calling sas_rphy_add() John Garry
2022-10-25 10:18 ` [PATCH RFC v3 08/22] scsi: scsi_transport_sas: Alloc sdev for expander John Garry
2022-10-25 10:18 ` [PATCH RFC v3 09/22] scsi: libsas: Add sas_alloc_slow_task_rq() John Garry
2022-10-25 10:18 ` [PATCH RFC v3 10/22] scsi: libsas: Add sas_queuecommand_internal() John Garry
2022-10-25 10:18 ` [PATCH RFC v3 11/22] scsi: libsas: Add sas_internal_timeout() John Garry
2022-10-25 10:18 ` [PATCH RFC v3 12/22] scsi: core: Use SCSI_SCAN_RESCAN in __scsi_add_device() John Garry
2022-10-25 10:18 ` [PATCH RFC v3 13/22] scsi: scsi_transport_sas: Allocate end device target id in the rphy alloc John Garry
2022-10-25 10:18 ` John Garry [this message]
2022-10-25 10:18 ` [PATCH RFC v3 15/22] scsi: libsas: Add sas_ata_setup_device() John Garry
2022-10-25 10:18 ` [PATCH RFC v3 16/22] ata: libata-scsi: Allocate sdev early in port probe John Garry
2022-10-27 1:34 ` Damien Le Moal
2022-10-27 8:11 ` Hannes Reinecke
2022-10-27 9:16 ` Damien Le Moal
2022-10-27 9:51 ` Hannes Reinecke
2022-11-07 10:09 ` John Garry
2022-11-07 10:20 ` Hannes Reinecke
2022-10-25 10:18 ` [PATCH RFC v3 17/22] scsi: libsas drivers: Reserve tags John Garry
2022-10-25 10:18 ` [PATCH RFC v3 18/22] scsi: libsas: Queue SMP commands as requests John Garry
2022-10-27 1:36 ` Damien Le Moal
2022-10-27 10:45 ` John Garry
2022-10-25 10:18 ` [PATCH RFC v3 19/22] scsi: libsas: Queue TMF " John Garry
2022-10-25 10:18 ` [PATCH RFC v3 20/22] scsi: core: Add scsi_alloc_request_hwq() John Garry
2022-10-25 10:18 ` [PATCH RFC v3 21/22] scsi: libsas: Queue internal abort commands as requests John Garry
2022-10-29 1:15 ` chenxiang (M)
2022-11-02 10:04 ` John Garry
2022-11-03 3:09 ` chenxiang (M)
2022-10-25 10:18 ` [PATCH RFC v3 22/22] scsi: libsas: Delete sas_task_slow.timer John Garry
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