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  1. 02 12月, 2006 4 次提交
  3. 28 11月, 2006 2 次提交
  5. 14 11月, 2006 1 次提交
    • D
      libata: fix double-completion on error · 253b92ec
      由 Darrick J. Wong 提交于 
      A curious thing happens, however, when ata_qc_new_init fails to get
an ata_queued_cmd:

First, ata_qc_new_init handles the failure like this:
    cmd->result = (DID_OK << 16) | (QUEUE_FULL << 1);
    done(cmd);

Then, we return to ata_scsi_translate and do this:
    err_mem:
        cmd->result = (DID_ERROR << 16);
        done(cmd);

It appears to me that first we set a status code indicating that we're
ok but the device queue is full and finish the command,  but then
we blow away that status code and replace it with an error flag and
finish the command a second time!  That does not seem to be desirable
behavior since we merely want the I/O to wait until a command slot
frees up, not send errors up the block layer.

In the err_mem case, we should simply exit out of ata_scsi_translate
instead.
Signed-off-by: NDarrick J. Wong <djwong@us.ibm.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>
      253b92ec
  7. 11 10月, 2006 1 次提交
  9. 30 9月, 2006 1 次提交
  11. 29 9月, 2006 1 次提交
  13. 24 8月, 2006 1 次提交
    • J
      libata: Grand renaming. · cca3974e
      由 Jeff Garzik 提交于 
      The biggest change is that ata_host_set is renamed to ata_host.

* ata_host_set			=> ata_host
* ata_probe_ent->host_flags	=> ata_probe_ent->port_flags
* ata_probe_ent->host_set_flags	=> ata_probe_ent->_host_flags
* ata_host_stats		=> ata_port_stats
* ata_port->host		=> ata_port->scsi_host
* ata_port->host_set		=> ata_port->host
* ata_port_info->host_flags	=> ata_port_info->flags
* ata_(.*)host_set(.*)\(\)	=> ata_\1host\2()

The leading underscore in ata_probe_ent->_host_flags is to avoid
reusing ->host_flags for different purpose.  Currently, the only user
of the field is libata-bmdma.c and probe_ent itself is scheduled to be
removed.

ata_port->host is reused for different purpose but this field is used
inside libata core proper and of different type.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>
      cca3974e
  15. 10 8月, 2006 1 次提交
  17. 09 8月, 2006 2 次提交
    • T
      [PATCH] libata: clear sdev->locked on door lock failure · 22aac089
      由 Tejun Heo 提交于 
      SCSI EH locks door if sdev->locked is set.  Sometimes door lock
command fails continuously (e.g. when medium is not present) and as
libata uses EH to acquire sense data, this easily creates a loop where
a failed lock door invokes EH and EH issues lock door on completion.

This patch clears sdev->locked on door lock failure to break this
loop.  This problem has been spotted and diagnosed by Unicorn Chang
<uchang@tw.ibm.com>.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>
      22aac089
    • B
      [PATCH] libata: Add support for SATA attachment to SAS adapters · 80289167
      由 Brian King 提交于 
      The following patch enhances libata to allow SAS device drivers
to utilize libata to talk to SATA devices. It introduces some
new APIs which allow libata to be used without allocating a
virtual scsi host.

New APIs:

ata_sas_port_alloc - Allocate an ata_port
ata_sas_port_init - Initialize an ata_port (probe device, etc)
ata_sas_port_destroy - Free an ata_port allocated by ata_sas_port_alloc
ata_sas_slave_configure - configure scsi device
ata_sas_queuecmd - queue a scsi command, similar to ata_scsi_queuecomand

These new APIs can be used either directly by a SAS LLDD or could be used
by the SAS transport class.

Possible usage for a SAS LLDD would be:

scsi_scan_host
	target_alloc
		ata_sas_port_alloc
	slave_alloc
		ata_sas_port_init
	slave_configure
		ata_sas_slave_configure

Commands received by the LLDD for SATA devices would call ata_sas_queuecmd.

Device teardown would occur with:

slave_destroy
	port_disable
target_destroy
	ata_sas_port_destroy
Signed-off-by: NBrian King <brking@us.ibm.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>
      80289167
  19. 29 7月, 2006 1 次提交
  21. 06 7月, 2006 3 次提交
    • T
      [PATCH] libata: reimplement per-dev PM · d6f26d1f
      由 Tejun Heo 提交于 
      Reimplement per-dev PM.  The original implementation directly put the
device into suspended mode and didn't synchronize w/ EH operations
including hotplug.  This patch reimplements ata_scsi_device_suspend()
and ata_scsi_device_resume() such that they request EH to perform the
respective operations.  Both functions synchronize with hotplug such
that it doesn't operate on detached devices.

Suspend waits for completion but resume just issues request and
returns.  This allows parallel wake up of devices and thus speeds up
system resume.

Due to sdev detach synchronization, it's not feasible to separate out
EH requesting from sdev handling; thus, ata_device_suspend/resume()
are removed and everything is implemented in the respective
libata-scsi functions.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>
      d6f26d1f
    • T
      [PATCH] libata: implement ATA_EHI_RESUME_LINK · 28324304
      由 Tejun Heo 提交于 
      Implement ATA_EHI_RESUME_LINK, which indicates that the link needs to
be resumed.  This used to be implied by ATA_EHI_HOTPLUGGED.  However,
hotplug isn't the only event which requires link resume and separating
this out allows other places to request link resume.  This
differentiation also allows better debounce timing selection.

This patch converts user scan to use ATA_EHI_RESUME_LINK.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>
      28324304
    • T
      [PATCH] libata: add ap->pflags and move core dynamic flags to it · b51e9e5d
      由 Tejun Heo 提交于 
      ap->flags is way too clamped.  Separate out core dynamic flags to
ap->pflags.  ATA_FLAG_DISABLED is a dynamic flag but left alone as
it's referenced by a lot of LLDs and it's gonna be removed once all
LLDs are converted to new EH.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>
      b51e9e5d
  23. 28 6月, 2006 1 次提交
  25. 23 6月, 2006 2 次提交
  27. 12 6月, 2006 2 次提交
  29. 11 6月, 2006 1 次提交
  31. 06 6月, 2006 1 次提交
  33. 31 5月, 2006 7 次提交
  35. 24 5月, 2006 2 次提交
  37. 20 5月, 2006 1 次提交
  39. 15 5月, 2006 5 次提交
    • T
      [PATCH] libata-ncq: implement NCQ device configuration · a6e6ce8e
      由 Tejun Heo 提交于 
      Now that all NCQ related stuff are in place, implement NCQ device
configuration and bump ATA_MAX_QUEUE to 32 thus activating NCQ
support.

Original implementation is from Jens Axboe.
Signed-off-by: NTejun Heo <htejun@gmail.com>
      a6e6ce8e
    • T
      [PATCH] libata-ncq: implement NCQ command translation and exclusion · 3dc1d881
      由 Tejun Heo 提交于 
      This patch implements NCQ command translation and exclusion.  Note
that NCQ commands don't use ata_rwcmd_protocol() to choose ATA
command.  This is because, unlike non-NCQ RW commands, NCQ commands
can only be used for NCQ protocol and FUA handling is done with a flag
rather than separate command.

NCQ enabled device will have queue depth larger than one but no two
non-NCQ commands can be issued simultaneously, neither can a non-NCQ
command and NCQ commands.  This patch makes ata_scsi_translate()
return SCSI_MLQUEUE_DEVICE_BUSY if such exclusion is necessary.  SCSI
midlayer will retry the command later.

As SCSI midlayer always retries once a command completes, this doesn't
incur unnecessary delays and as most commands will be NCQ ones for NCQ
device, so the overhead should be negligible.

Initial implementation is from Jens Axboe and using
SCSI_MLQUEUE_DEVICE_BUSY for exclusion is suggested by Jeff Garzik.
Signed-off-by: NTejun Heo <htejun@gmail.com>
      3dc1d881
    • T
      [PATCH] libata-ncq: pass ata_scsi_translate() return value to SCSI midlayer · 2115ea94
      由 Tejun Heo 提交于 
      ata_scsi_translate() will need to return SCSI_ML_QUEUE_DEVICE_BUSY to
achieve exlusion between NCQ and non-NCQ commands or among non-NCQ
commands.  Pass its return value upward to SCSI midlayer.
Signed-off-by: NTejun Heo <htejun@gmail.com>
      2115ea94
    • T
      [PATCH] libata-eh-fw: update SCSI command completion path for new EH · 246619da
      由 Tejun Heo 提交于 
      SCSI command completion path used to do some part of EH including
printing messages and obtaining sense data.  With new EH, all these
are responsibilities of the EH, update SCSI command completion path to
reflect this.
Signed-off-by: NTejun Heo <htejun@gmail.com>
      246619da
    • T
      [PATCH] libata-eh-fw: implement ata_port_schedule_eh() and ata_port_abort() · 7b70fc03
      由 Tejun Heo 提交于 
      ata_port_schedule_eh() directly schedules EH for @ap without
associated qc.  Once EH scheduled, no further qc is allowed and EH
kicks in as soon as all currently active qc's are drained.

ata_port_abort() schedules all currently active commands for EH by
qc_completing them with ATA_QCFLAG_FAILED set.  If ata_port_abort()
doesn't find any qc to abort, it directly schedule EH using
ata_port_schedule_eh().

These two functions provide ways to invoke EH for conditions which
aren't directly related to any specfic qc.
Signed-off-by: NTejun Heo <htejun@gmail.com>
      7b70fc03