303694eeee
libsas power management routines to suspend and recover the sas domain
based on a model where the lldd is allowed and expected to be
"forgetful".
sas_suspend_ha - disable event processing allowing the lldd to take down
links without concern for causing hotplug events.
Regardless of whether the lldd actually posts link down
messages libsas notifies the lldd that all
domain_devices are gone.
sas_prep_resume_ha - on the way back up before the lldd starts link
training clean out any spurious events that were
generated on the way down, and re-enable event
processing
sas_resume_ha - after the lldd has started and decided that all phys
have posted link-up events this routine is called to let
libsas start it's own timeout of any phys that did not
resume. After the timeout an lldd can cancel the
phy teardown by posting a link-up event.
Storage for ex_change_count (u16) and phy_change_count (u8) are changed
to int so they can be set to -1 to indicate 'invalidated'.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Jacek Danecki <jacek.danecki@intel.com>
Tested-by: Maciej Patelczyk <maciej.patelczyk@intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
105 lines
2.7 KiB
C
105 lines
2.7 KiB
C
/*
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* Support for SATA devices on Serial Attached SCSI (SAS) controllers
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*
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* Copyright (C) 2006 IBM Corporation
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*
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* Written by: Darrick J. Wong <djwong@us.ibm.com>, IBM Corporation
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*
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*/
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#ifndef _SAS_ATA_H_
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#define _SAS_ATA_H_
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#include <linux/libata.h>
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#include <scsi/libsas.h>
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#ifdef CONFIG_SCSI_SAS_ATA
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static inline int dev_is_sata(struct domain_device *dev)
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{
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return dev->dev_type == SATA_DEV || dev->dev_type == SATA_PM ||
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dev->dev_type == SATA_PM_PORT || dev->dev_type == SATA_PENDING;
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}
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int sas_get_ata_info(struct domain_device *dev, struct ex_phy *phy);
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int sas_ata_init(struct domain_device *dev);
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void sas_ata_task_abort(struct sas_task *task);
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void sas_ata_strategy_handler(struct Scsi_Host *shost);
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void sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q,
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struct list_head *done_q);
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void sas_ata_schedule_reset(struct domain_device *dev);
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void sas_ata_wait_eh(struct domain_device *dev);
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void sas_probe_sata(struct asd_sas_port *port);
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void sas_suspend_sata(struct asd_sas_port *port);
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void sas_resume_sata(struct asd_sas_port *port);
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void sas_ata_end_eh(struct ata_port *ap);
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#else
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static inline int dev_is_sata(struct domain_device *dev)
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{
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return 0;
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}
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static inline int sas_ata_init(struct domain_device *dev)
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{
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return 0;
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}
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static inline void sas_ata_task_abort(struct sas_task *task)
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{
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}
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static inline void sas_ata_strategy_handler(struct Scsi_Host *shost)
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{
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}
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static inline void sas_ata_eh(struct Scsi_Host *shost, struct list_head *work_q,
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struct list_head *done_q)
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{
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}
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static inline void sas_ata_schedule_reset(struct domain_device *dev)
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{
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}
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static inline void sas_ata_wait_eh(struct domain_device *dev)
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{
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}
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static inline void sas_probe_sata(struct asd_sas_port *port)
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{
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}
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static inline void sas_suspend_sata(struct asd_sas_port *port)
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{
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}
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static inline void sas_resume_sata(struct asd_sas_port *port)
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{
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}
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static inline int sas_get_ata_info(struct domain_device *dev, struct ex_phy *phy)
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{
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return 0;
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}
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static inline void sas_ata_end_eh(struct ata_port *ap)
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{
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}
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#endif
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#endif /* _SAS_ATA_H_ */
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