linux-stable.git/include/linux/ata.h, branch linux-2.6.25.y

libata: automatically use DMADIR if drive/bridge requires it

2008-02-24T05:27:33+00:00

Back in 2.6.17-rc2, a libata module parameter was added for atapi_dmadir.

That's nice, but most SATA devices which need it will tell us about it
in their IDENTIFY PACKET response, as bit-15 of word-62 of the
returned data (as per ATA7, ATA8 specifications).

So for those which specify it, we should automatically use the DMADIR bit.
Otherwise, disc writing will fail by default on many SATA-ATAPI drives.

This patch adds ATA_DFLAG_DMADIR and make ata_dev_configure() set it
if atapi_dmadir is set or identify data indicates DMADIR is necessary.
atapi_xlat() is converted to check ATA_DFLAG_DMADIR before setting
DMADIR.

Original patch is from Mark Lord.

Signed-off-by: Tejun Heo 
Cc: Mark Lord 
Signed-off-by: Jeff Garzik

libata annotations and fixes

2008-01-23T10:24:15+00:00

Signed-off-by: Al Viro 
Signed-off-by: Jeff Garzik

libata: rename ATA_PROT_ATAPI_* to ATAPI_PROT_*

2008-01-23T10:24:14+00:00

ATA_PROT_ATAPI_* are ugly and naming schemes between ATA_PROT_* and
ATA_PROT_ATAPI_* are inconsistent causing confusion.  Rename them to
ATAPI_PROT_* and make them consistent with ATA counterpart.

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

libata: add ATA_CBL_PATA_IGN

2008-01-23T10:24:12+00:00

ATA_CBL_PATA_UNK indicates that the cable type can't be determined
from the host side and might be either 80c or 40c.  libata applies
drive or other generic limit in this case.  However, there are
controllers where both host and drive side detections are
misimplemented and the driver has to rely solely on private method -
peeking BIOS or ACPI configuration or using some other private
mechanism.

This patch adds ATA_CBL_PATA_IGN which tells libata to ignore the
cable type completely and just let the LLD determine the transfer mode
via host transfer mode masks and ->mode_filter().

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

libata: implement protocol tests

2008-01-23T10:24:10+00:00

Implement protocol tests - ata_is_atapi(), ata_is_nodata(),
ata_is_pio(), ata_is_dma(), ata_is_ncq() and ata_is_data() and use
them to replace is_atapi_taskfile() and hard coded protocol tests.

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

libata: Disable ATA8-ACS proposed Trusted Computing features by default

2008-01-23T10:24:09+00:00

Historically word 48 in the identify data was used to mean 32bit I/O
was supported for VLB IDE etc. ATA8 reassigns this word to the Trusted
Computing Group, where it is used for TCG features. This means that
an ATA8 TCG drive is going to trigger 32bit I/O on some systems which
will be funny.

Anyway we need to sort this out ready for ATA8 so:
- Reorder the ata.h header a bit so the ata_version function occurs early
  in it
- Make dword_io check the ATA version
- Add an ATA8 version checking TCG presence test

While we are at it the current drafts have a flaw where it may not be
possible to disable TCG features at boot (and opt out of the trusted
model) as TCG intends because it relies on presence of a different
optional feature (DCS). Handle this in software by refusing the TCG
commands if libata.allow_tpm is not set. (We must make it possible
as some environments such as proprietary VDR devices will doubtless
want to use it to lock up content)

Finally as with CPRM print a warning so that the user knows they may
not be able to full access and use the device.

Signed-off-by: Alan Cox

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