81c757bc69
Link resets leave ata affiliations intact, so arrange for libsas to make an effort to avoid dropping the device due to a slow-to-recover link. Towards this end carry out reset in the host workqueue so that it can check for ata devices and kick the reset request to libata. Hard resets, in contrast, bypass libata since they are meant for associating an ata device with another initiator in the domain (tears down affiliations). Need to add a new transport_sas_phy_reset() since the current sas_phy_reset() is a utility function to libsas lldds. They are not prepared for it to loop back into eh. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
89 lines
2.3 KiB
C
89 lines
2.3 KiB
C
/*
|
|
* Support for SATA devices on Serial Attached SCSI (SAS) controllers
|
|
*
|
|
* Copyright (C) 2006 IBM Corporation
|
|
*
|
|
* Written by: Darrick J. Wong <djwong@us.ibm.com>, IBM Corporation
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of the
|
|
* License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
|
|
* USA
|
|
*
|
|
*/
|
|
|
|
#ifndef _SAS_ATA_H_
|
|
#define _SAS_ATA_H_
|
|
|
|
#include <linux/libata.h>
|
|
#include <scsi/libsas.h>
|
|
|
|
#ifdef CONFIG_SCSI_SAS_ATA
|
|
|
|
static inline int dev_is_sata(struct domain_device *dev)
|
|
{
|
|
return dev->dev_type == SATA_DEV || dev->dev_type == SATA_PM ||
|
|
dev->dev_type == SATA_PM_PORT;
|
|
}
|
|
|
|
int sas_ata_init_host_and_port(struct domain_device *found_dev,
|
|
struct scsi_target *starget);
|
|
|
|
void sas_ata_task_abort(struct sas_task *task);
|
|
void sas_ata_strategy_handler(struct Scsi_Host *shost);
|
|
int sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q,
|
|
struct list_head *done_q);
|
|
void sas_probe_sata(struct work_struct *work);
|
|
void sas_ata_schedule_reset(struct domain_device *dev);
|
|
void sas_ata_wait_eh(struct domain_device *dev);
|
|
#else
|
|
|
|
|
|
static inline int dev_is_sata(struct domain_device *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline int sas_ata_init_host_and_port(struct domain_device *found_dev,
|
|
struct scsi_target *starget)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void sas_ata_task_abort(struct sas_task *task)
|
|
{
|
|
}
|
|
|
|
static inline void sas_ata_strategy_handler(struct Scsi_Host *shost)
|
|
{
|
|
}
|
|
|
|
static inline int sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q,
|
|
struct list_head *done_q)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void sas_probe_sata(struct work_struct *work)
|
|
{
|
|
}
|
|
|
|
static inline void sas_ata_schedule_reset(struct domain_device *dev)
|
|
{
|
|
}
|
|
|
|
static inline void sas_ata_wait_eh(struct domain_device *dev)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#endif /* _SAS_ATA_H_ */
|