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  1. 22 Oct, 2010 6 commits
    • Tejun Heo's avatar
      libata: clean up lpm related symbols and sysfs show/store functions · c93b263e
      Tejun Heo authored 
      Link power management related symbols are in confusing state w/ mixed
usages of lpm, ipm and pm.  This patch cleans up lpm related symbols
and sysfs show/store functions as follows.

* lpm states - NOT_AVAILABLE, MIN_POWER, MAX_PERFORMANCE and
  MEDIUM_POWER are renamed to ATA_LPM_UNKNOWN and
  ATA_LPM_{MIN|MAX|MED}_POWER.

* Pre/postfixes are unified to lpm.

* sysfs show/store functions for link_power_management_policy were
  curiously named get/put and unnecessarily complex.  Renamed to
  show/store and simplified.
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
      c93b263e
    • Luck, Tony's avatar
      [libata] Fix section mismatch: ata_sff_exit · c43d559f
      Luck, Tony authored 
      This build error showed up in linux-next tag next-20100820 for ia64:

WARNING: vmlinux.o(.init.text+0x4a952): Section mismatch in reference from the function ata_init() to the function .exit.text:ata_sff_exit()
The function __init ata_init() references
a function __exit ata_sff_exit().
This is often seen when error handling in the init function
uses functionality in the exit path.
The fix is often to remove the __exit annotation of
ata_sff_exit() so it may be used outside an exit section.

Sure enough, dropping the __exit fixes the problem.
Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
      c43d559f
    • Jeff Garzik's avatar
      drivers/ata/libata-transport.c: include linux/slab.h · 6a2148c6
      Jeff Garzik authored 
      Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
      6a2148c6
    • Grant Grundler's avatar
      [libata] support for > 512 byte sectors (e.g. 4K Native) · 295124dc
      Grant Grundler authored 
      This change enables my x86 machine to recognize and talk to a
"Native 4K" SATA device.

When I started working on this, I didn't know Matthew Wilcox had
posted a similar patch 2 years ago:
  http://git.kernel.org/?p=linux/kernel/git/willy/ata.git;a=shortlog;h=refs/heads/ata-large-sectors

Gwendal Grignou pointed me at the the above code and small portions of
this patch include Matthew's work. That's why Mathew is first on the
"Signed-off-by:". I've NOT included his use of a bitmap to determine
512 vs Native for ATA command block size - just used a simple table.
And bugs are almost certainly mine.

Lastly, the patch has been tested with a native 4K 'Engineering
Sample' drive provided by Hitachi GST.
Signed-off-by: default avatarMatthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: default avatarGrant Grundler <grundler@google.com>
Reviewed-by: default avatarGwendal Grignou <gwendal@google.com>
Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
      295124dc
    • Tejun Heo's avatar
      libata: always use ata_qc_complete_multiple() for NCQ command completions · 1aadf5c3
      Tejun Heo authored 
      Currently, sata_fsl, mv and nv call ata_qc_complete() multiple times
from their interrupt handlers to indicate completion of NCQ commands.
This limits the visibility the libata core layer has into how commands
are being executed and completed, which is necessary to support IRQ
expecting in generic way.  libata already has an interface to complete
multiple commands at once - ata_qc_complete_multiple() which ahci and
sata_sil24 already use.

This patch updates the three drivers to use ata_qc_complete_multiple()
too and updates comments on ata_qc_complete[_multiple]() regarding
their usages with NCQ completions.  This change not only provides
better visibility into command execution to the core layer but also
simplifies low level drivers.

* sata_fsl: It already builds done_mask.  Conversion is straight
  forward.

* sata_mv: mv_process_crpb_response() no longer checks for illegal
  completions, it just returns whether the tag is completed or not.
  mv_process_crpb_entries() builds done_mask from it and passes it to
  ata_qc_complete_multiple() which will check for illegal completions.

* sata_nv adma: Similar to sata_mv.  nv_adma_check_cpb() now just
  returns the tag status and nv_adma_interrupt() builds done_mask from
  it and passes it to ata_qc_complete_multiple().

* sata_nv swncq: It already builds done_mask.  Drop unnecessary
  illegal transition checks and call ata_qc_complete_multiple().

In the long run, it might be a good idea to make ata_qc_complete()
whine if called when multiple NCQ commands are in flight.
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Cc: Ashish Kalra <ashish.kalra@freescale.com>
Cc: Saeed Bishara <saeed@marvell.com>
Cc: Mark Lord <liml@rtr.ca>
Cc: Robert Hancock <hancockr@shaw.ca>
Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
      1aadf5c3
    • Gwendal Grignou's avatar
      [libata] Add ATA transport class · d9027470
      Gwendal Grignou authored 
      This is a scheleton for libata transport class.
All information is read only, exporting information from libata:
- ata_port class: one per ATA port
- ata_link class: one per ATA port or 15 for SATA Port Multiplier
- ata_device class: up to 2 for PATA link, usually one for SATA.
Signed-off-by: default avatarGwendal Grignou <gwendal@google.com>
Reviewed-by: default avatarGrant Grundler <grundler@google.com>
Signed-off-by: default avatarJeff Garzik <jgarzik@redhat.com>
      d9027470
  3. 20 Oct, 2010 5 commits
  5. 19 Oct, 2010 7 commits
  7. 18 Oct, 2010 18 commits
  9. 17 Oct, 2010 4 commits
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