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path: root/drivers/scsi/libsas/sas_phy.c
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* [SCSI] libsas: suspend / resume supportDan Williams2012-08-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* [SCSI] libsas: introduce sas_work to fix sas_drain_work vs sas_queue_workDan Williams2012-04-23
| | | | | | | | | | | | | | When requeuing work to a draining workqueue the last work instance may not be idle, so sas_queue_work() must not touch work->entry. Introduce sas_work with a drain_node list_head to have a private list for collecting work deferred due to drain collision. Fixes reports like: BUG: unable to handle kernel NULL pointer dereference at (null) IP: [<ffffffff810410d4>] process_one_work+0x2e/0x338 Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
* [SCSI] libsas: replace event locks with atomic bitopsDan Williams2012-02-19
| | | | | | | | The locks only served to make sure the pending event bitmask was updated consistently. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
* [SCSI] libsas: fix/amend device gone notification in sas_deform_port()Dan Williams2011-05-26
| | | | | | | | | | | | | | | Commit 56dd2c06 "libsas: Don't issue commands to devices that have been hot-removed" edited Darrick's original patch to remove setting 'gone' in the sas_deform_port() path because that prevented scsi sync cache commands from being issued when the driver was unloaded. However, this allows true device gone notifications (as signaled port phy events) to trigger sync cache commands to devices that are known to be unreachable. Teach libsas which sas_deform_port() invocations are likely device gone events. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: James Bottomley <jbottomley@parallels.com>
* WorkStruct: make allyesconfigDavid Howells2006-11-22
| | | | | | Fix up for make allyesconfig. Signed-Off-By: David Howells <dhowells@redhat.com>
* [SCSI] aci94xx: implement link rate settingJames Bottomley2006-09-07
| | | | | | | | | This patch implements the ability to set the minimum and maximum linkrates for both libsas (for expanders) and aic94xx (for the host phys). It also tidies up the setting of the hardware min and max to make sure they're updated when the expander emits a change broadcast. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] aic94xx: new driverJames Bottomley2006-08-29
This is the end point of the separate aic94xx driver based on the original driver and transport class from Luben Tuikov <ltuikov@yahoo.com> The log of the separate development is: Alexis Bruemmer: o aic94xx: fix hotplug/unplug for expanderless systems o aic94xx: disable split completion timer/setting by default o aic94xx: wide port off expander support o aic94xx: remove various inline functions o aic94xx: use bitops o aic94xx: remove queue comment o aic94xx: remove sas_common.c o aic94xx: sas remove depot's o aic94xx: use available list_for_each_entry_safe_reverse() o aic94xx: sas header file merge James Bottomley: o aic94xx: fix TF_TMF_NO_CTX processing o aic94xx: convert to request_firmware interface o aic94xx: fix hotplug/unplug o aic94xx: add link error counts to the expander phys o aic94xx: add transport class phy reset capability o aic94xx: remove local_attached flag o Remove README o Fixup Makefile variable for libsas rename o Rename sas->libsas o aic94xx: correct return code for sas_discover_event o aic94xx: use parent backlink port o aic94xx: remove channel abstraction o aic94xx: fix routing algorithms o aic94xx: add backlink port o aic94xx: fix cascaded expander properties o aic94xx: fix sleep under lock o aic94xx: fix panic on module removal in complex topology o aic94xx: make use of the new sas_port o rename sas_port to asd_sas_port o Fix for eh_strategy_handler move o aic94xx: move entirely over to correct transport class formulation o remove last vestages of sas_rphy_alloc() o update for eh_timed_out move o Preliminary expander support for aic94xx o sas: remove event thread o minor warning cleanups o remove last vestiges of id mapping arrays o Further updates o Convert aic94xx over entirely to the transport class end device and o update aic94xx/sas to use the new sas transport class end device o [PATCH] aic94xx: attaching to the sas transport class o Add missing completion removal from prior patch o [PATCH] aic94xx: attaching to the sas transport class o Build fixes from akpm Jeff Garzik: o [scsi aic94xx] Remove ->owner from PCI info table Luben Tuikov: o initial aic94xx driver Mike Anderson: o aic94xx: fix panic on module insertion o aic94xx: stub out SATA_DEV case o aic94xx: compile warning cleanups o aic94xx: sas_alloc_task o aic94xx: ref count update o aic94xx nexus loss time value o [PATCH] aic94xx: driver assertion in non-x86 BIOS env Randy Dunlap: o libsas: externs not needed Robert Tarte: o aic94xx: sequence patch - fixes SATA support Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>