linux-stable.git/include/linux/ata.h, branch linux-2.6.24.y

libata: correct handling of TSS DVD

2008-01-15T21:35:21+00:00

Devices that misreport the validity bit for word 93 look like SATA.  If
they are on the blacklist then we must not test for SATA but assume 40 wire
in the 40 wire case (The TSSCorp reports 80 wire on SATA it seems!)

Signed-off-by: Alan Cox 
Cc: Tejun Heo 
Cc: Jeff Garzik 
Signed-off-by: Andrew Morton 
Signed-off-by: Jeff Garzik

libata: add more opcodes to ata.h

2007-12-18T01:33:12+00:00

Add constants for DEVICE CONFIGURATION OVERLAY and SET_MAX to
include/linux/ata.h.

Signed-off-by: Tejun Heo 
Signed-off-by: Jeff Garzik

libata: handle broken cable reporting

2007-11-05T23:10:28+00:00

One or two ancient drives predated the cable spec and didn't sent the
valid bits for the field. I had hoped to leave this out of libata as a
piece of historical annoyance but a recent CD drive shows the same bug so
we have to import support for it.

Same concept as Bartlomiej's changes old IDE except that as we have
centralised blacklists we can avoid keeping another private table of stuff

Signed-off-by: Alan Cox 
Signed-off-by: Jeff Garzik

libata and bogus LBA48 drives

2007-11-05T03:53:15+00:00

A colleague noticed recent versions of Ubuntu no longer detect his 80 GB
ST380020ACE drive. This drive is special in that it advertises LBA48 support,
but has the lba_capacity_2 field set to zero (cfr.
http://lkml.org/lkml/2004/3/30/163).

Upon closer look, libata indeed doesn't seem to handle this case yet.
Below is an (untested) fix.

Signed-off-by: Jeff Garzik

libata: increase 128 KB / cmd limit for ATAPI tape drives

2007-11-03T12:46:54+00:00

Commands sent to ATAPI tape drives via the SCSI generic (sg) driver are
limited in the amount of data that they can transfer by the max_sectors
value.  The max_sectors value is currently calculated according to the
command set for disk drives, which doesn't apply to tape drives.  The
default max_sectors value of 256 limits ATAPI tape drive commands to
128 KB.  This patch against 2.6.24-rc1 increases the max_sectors value
for tape drives to 65535, which permits tape drive commands to transfer
just under 32 MB.

Tested with a SuperMicro PDSME motherboard, AHCI, and a Sony SDX-570V
SATA tape drive.

Note that some of the chipset drivers also set their own max_sectors
value, which may override the value set in libata-core.  I don't have
any of these chipsets to test, so I didn't go messing with them.  Also,
ATAPI devices other than tape drives may benefit from similar changes,
but I have only tape drives and disk drives to test.

Signed-off-by: Tony Battersby 
Signed-off-by: Jeff Garzik

[libata] Link power management infrastructure

2007-10-29T15:00:35+00:00

Device Initiated Power Management, which is defined
in SATA 2.5 can be enabled for disks which support it.
This patch enables DIPM when the user sets the link
power management policy to "min_power".

Additionally, libata drivers can define a function
(enable_pm) that will perform hardware specific actions to
enable whatever power management policy the user set up
for Host Initiated Power management (HIPM).
This power management policy will be activated after all
disks have been enumerated and intialized.  Drivers should
also define disable_pm, which will turn off link power
management, but not change link power management policy.

Documentation/scsi/link_power_management_policy.txt has additional
information.

Signed-off-by:  Kristen Carlson Accardi 
Signed-off-by: Jeff Garzik

libata: track SLEEP state and issue SRST to wake it up

2007-10-29T10:15:25+00:00

ATA devices in SLEEP mode don't respond to any commands.  SRST is
necessary to wake it up.  Till now, when a command is issued to a
device in SLEEP mode, the command times out, which makes EH reset the
device and retry the command after that, causing a long delay.

This patch makes libata track SLEEP state and issue SRST automatically
if a command is about to be issued to a device in SLEEP.

Signed-off-by: Tejun Heo 
Cc: Bruce Allen 
Cc: Andrew Paprocki 
Signed-off-by: Jeff Garzik

[libata] checkpatch-inspired cleanups

2007-10-24T00:59:42+00:00

Tackle the relatively sane complaints of checkpatch --file.

The vast majority is indentation and whitespace changes, the rest are

* #include fixes
* printk KERN_xxx prefix addition
* BSS/initializer cleanups

Signed-off-by: Jeff Garzik

libata: add human-readable error value decoding

2007-10-12T18:55:45+00:00

This adds human-readable decoding of the ATA status and error registers
(similar to what drivers/ide does) as well as the SATA Serror register
to libata error handling output.  This prevents the need to pore
through standards documents to figure out the meaning of the bits
in these registers when looking at error reports.  Some bits that
drivers/ide decoded are not decoded here, since the bits are either
command-dependent or obsolete, and properly parsing them would add
too much complexity.

Signed-off-by: Robert Hancock 

[edited slightly to make output a bit more symmetric]
Signed-off-by: Jeff Garzik

libata: misc updates for AN

2007-10-12T18:55:40+00:00

Update AN support in preparation of PMP support.

* s/ata_id_has_AN/ata_id_has_atapi_AN/
* add AN enabled reporting during configuration
* add err_mask to AN configuration failure reporting
* update LOCKING comment for ata_scsi_media_change_notify()
* check whether ATA dev is attached to SCSI dev ata_scsi_media_change_notify()
* set ATA_FLAG_AN in ahci and sata_sil24

Signed-off-by: Tejun Heo 
Cc: Kriten Carlson Accardi 
Signed-off-by: Jeff Garzik