[sata] new libata-dev-2.6 queue created (AHCI, SATA bridges)

[sata] new libata-dev-2.6 queue created (AHCI, SATA bridges)

[Jeff Garzik]

"libata-dev-2.6" is a new patch queue for SATA features which are under
development, or need additional testing before being deployed into the
upstream-bound libata-2.[46] queues.

It currently contains:

1) A workaround for problems on multiple SATA controllers when using
PATA disks attached via SATA bridges.

2) New driver AHCI.  This should currently be considered a technology
preview or early beta test.  Simply because it is a young driver on
complicated hardware, using a new "FIS-based" delivery method (read:
brand new hotpath), caution is advised.  Do not use in production yet.


I have updated my SATA status page to reflect these updates:
	http://linux.yyz.us/sata/sata-status.html


BK users:
bk pull bk://gkernel.bkbits.net/libata-dev-2.6

Patch (NOTE: relative to 2.6.9-rc2-bk1-libata1.patch):
http://www.kernel.org/pub/linux/kernel/people/jgarzik/libata/2.6.9-rc2-bk1-libata1-dev1.patch.bz2

This will update the following files:

 drivers/scsi/Kconfig       |    8 
 drivers/scsi/Makefile      |    1 
 drivers/scsi/ahci.c        |  973 +++++++++++++++++++++++++++++++++++++++++++++
 drivers/scsi/libata-core.c |   37 +
 include/linux/ata.h        |    1 
 include/linux/libata.h     |    1 
 6 files changed, 1018 insertions(+), 3 deletions(-)

through these ChangeSets:

<jgarzik@pobox.com> (04/09/15 1.1905)
   [libata] add AHCI driver

<brad@wasp.net.au> (04/09/15 1.1902.1.1)
   [PATCH] libata basic detection and errata for PATA->SATA bridges
   
   This patch works around an issue with WD drives (and possibly others) over SiL PATA->SATA Bridges on SATA controllers locking up with transfers > 200 sectors.
   
   Signed-off-by: Brad Campbell <brad@wasp.net.au>

Re: [sata] new libata-dev-2.6 queue created (AHCI, SATA bridges)

[Andre Tomt]

Jeff Garzik wrote:

> I have updated my SATA status page to reflect these updates:
> 	http://linux.yyz.us/sata/sata-status.html

Good stuff :-)

Is there any news on Marvell progress? I'll get my hands dirty on a 
shipment with servers using the chips on friday, I may be able to sneak 
in some testing before deployment (they will be rewired to use ICH5-R 
for now)

Hmm, I wonder if there is any AHCI PCI(-X/E) plug-in boards planned. 
That would be nice indeed. Seems like SATAII-like features on PCI-boards 
are bound to Marvell or hardware RAID cards like 3ware 9xxx or newer LSI 
MegaRAID currently.