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  1. 24 5月, 2006 2 次提交
  3. 23 5月, 2006 2 次提交
  5. 22 5月, 2006 7 次提交
  7. 20 5月, 2006 6 次提交
  9. 17 5月, 2006 6 次提交
  11. 16 5月, 2006 6 次提交
  13. 15 5月, 2006 11 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 ap->qc_active, ap->sactive and complete helper · dedaf2b0
      由 Tejun Heo 提交于 
      Add ap->qc_active and ap->sactive, mask of all active qcs and libata's
view of the SActive register, respectively.  Also, implement
ata_qc_complete_multiple() which takes new qc_active mask and complete
multiple qcs according to the mask.

These will be used to track NCQ commands and complete them.  The
distinction between ap->qc_active and ap->sactive is also useful for
later PM implementation.
Signed-off-by: NTejun Heo <htejun@gmail.com>
      dedaf2b0
    • T
      [PATCH] libata-ncq: rename ap->qactive to ap->qc_allocated · 6cec4a39
      由 Tejun Heo 提交于 
      Rename ap->qactive to ap->qc_allocated.  This is to accomodate
addition of ap->qc_active, mask of active qcs.
Signed-off-by: NTejun Heo <htejun@gmail.com>
      6cec4a39
    • T
      [PATCH] libata-ncq: add NCQ related ATA/libata constants and macros · 88e49034
      由 Tejun Heo 提交于 
      Add NCQ related ATA/libata constants and macros.
Signed-off-by: NTejun Heo <htejun@gmail.com>
      88e49034
    • T
      [PATCH] libata-eh: implement BMDMA EH · 6d97dbd7
      由 Tejun Heo 提交于 
      Implement stock BMDMA error handling methods.
Signed-off-by: NTejun Heo <htejun@gmail.com>
      6d97dbd7
    • T
      [PATCH] libata-eh: implement new EH · 022bdb07
      由 Tejun Heo 提交于 
      Implement new EH.  The exported interface is ata_do_eh() which is to
be called from ->error_handler and performs the following steps to
recover the failed port.

ata_eh_autopsy() : analyze SError/TF, determine the cause of failure
		   and required recovery actions and record it in
		   ap->eh_context
ata_eh_report()	 : report the failure to user
ata_eh_recover() : perform recovery actions described in ap->eh_context
ata_eh_finish()	 : finish failed qcs

LLDDs can customize error handling by modifying eh_context before
calling ata_do_eh() or, if necessary, doing so inbetween each major
steps by calling each step explicitly.
Signed-off-by: NTejun Heo <htejun@gmail.com>
      022bdb07
    • T
      [PATCH] libata-eh: implement ata_eh_info and ata_eh_context · f3e81b19
      由 Tejun Heo 提交于 
      struct ata_eh_info serves as the communication channel between
execution path and EH.  Execution path describes detected error
condition in ap->eh_info and EH recovers the port using it.  To avoid
missing error conditions detected during EH, EH makes its own copy of
eh_info and clears it on entry allowing error info to accumulate
during EH.

Most EH states including EH's copy of eh_info are stored in
ap->eh_context (struct ata_eh_context) which is owned by EH and thus
doesn't require any synchronization to access and alter.  This
standardized context makes it easy to integrate various parts of EH
and extend EH to handle multiple links (for PM).
Signed-off-by: NTejun Heo <htejun@gmail.com>
      f3e81b19
    • T
      [PATCH] libata-eh: implement dev->ering · 0c247c55
      由 Tejun Heo 提交于 
      This patch implements ata_ering and uses it to define dev->ering.

ata_ering is a ring buffer which records libata errors - whether a
command was for normar IO request, err_mask and timestamp.  Errors are
recorded per-device in dev->ering.  This will be used by EH to
determine recovery actions.
Signed-off-by: NTejun Heo <htejun@gmail.com>
      0c247c55
    • T
      [PATCH] libata-eh: add ATA and libata flags for new EH · 9be1e979
      由 Tejun Heo 提交于 
      Add ATA and libata flags to be used by new EH.
Signed-off-by: NTejun Heo <htejun@gmail.com>
      9be1e979
    • T
      [PATCH] libata-eh-fw: update ata_scsi_error() for new EH · ad9e2762
      由 Tejun Heo 提交于 
      Update ata_scsi_error() for new EH.  ata_scsi_error() is responsible
for claiming timed out qcs and invoking ->error_handler in safe and
synchronized manner.  As the state of the controller is unknown if a
qc has timed out, the port is frozen in such cases.

Note that ata_scsi_timed_out() isn't used for new EH.  This is because
a timed out qc cannot be claimed by EH without freezing the port and
freezing the port in ata_scsi_timed_out() results in unnecessary
abortion of other active qcs.  ata_scsi_timed_out() can be removed
once all drivers are converted to new EH.

While at it, add 'TODO: kill' comments to old EH functions.
Signed-off-by: NTejun Heo <htejun@gmail.com>
      ad9e2762
    • T
      [PATCH] libata-eh-fw: implement freeze/thaw · e3180499
      由 Tejun Heo 提交于 
      Freezing is performed atomic w.r.t. host_set->lock and once frozen
LLDD is not allowed to access the port or any qc on it.  Also, libata
makes sure that no new qc gets issued to a frozen port.

A frozen port is thawed after a reset operation completes
successfully, so reset methods must do its job while the port is
frozen.  During initialization all ports get frozen before requesting
IRQ, so reset methods are always invoked on a frozen port.

Optional ->freeze and ->thaw operations notify LLDD that the port is
being frozen and thawed, respectively.  LLDD can disable/enable
hardware interrupt in these callbacks if the controller's IRQ mask can
be changed dynamically.  If the controller doesn't allow such
operation, LLDD can check for frozen state in the interrupt handler
and ack/clear interrupts unconditionally while frozen.
Signed-off-by: NTejun Heo <htejun@gmail.com>
      e3180499