[PATCH 0/3] libsas: add support for port multiplier

[PATCH 0/3] libsas: add support for port multiplier

[Xiangliang Yu]

This patch set will support SATA port multiplier(PM) in LIBSAS. 

LIBSAS is need to implement several key handling to support SATA PM:
First,low level driver notify libsas that SATA PM is attached to HBA port.
Then, LIBSAS will need to schedule SATA PMP error handler to scan SATA device
that is attached to PM, so we must implemet port softreset and PMP reset 
handling.
If find SATA devices, we should add the devices into SAS transport layer.
In order to find SAS domain device we must implemet device type transformation
: scsi device -> (port number) -> ata device -> domain device. Then, we can
execute IO operation.

In these patches, patch 1 is change SATA error handler.
And patch 2 will add SATA device into SAS layer and implement device type
transformation. Patch 3 implement SATA functional interface in mvsas.

 drivers/ata/libata-scsi.c           |   48 +++-
 drivers/scsi/libsas/sas_ata.c       |  584 ++++++++++++++++++++++++++++++++++-
 drivers/scsi/libsas/sas_discover.c  |   25 ++-
 drivers/scsi/libsas/sas_internal.h  |    7 +
 drivers/scsi/libsas/sas_phy.c       |    1 +
 drivers/scsi/libsas/sas_port.c      |   12 +
 drivers/scsi/libsas/sas_scsi_host.c |   12 +-
 drivers/scsi/mvsas/mv_64xx.c        |    2 +
 drivers/scsi/mvsas/mv_94xx.c        |   19 ++
 drivers/scsi/mvsas/mv_defs.h        |    1 +
 drivers/scsi/mvsas/mv_init.c        |    7 +
 drivers/scsi/mvsas/mv_sas.c         |  246 +++++++++++++++-
 drivers/scsi/mvsas/mv_sas.h         |    9 +
 include/scsi/libsas.h               |   19 +-
 include/scsi/sas_ata.h              |    5 +
 15 files changed, 970 insertions(+), 27 deletions(-)

Re: [PATCH 0/3] libsas: add support for port multiplier

[Tejun Heo]

On Thu, Apr 24, 2014 at 09:27:03PM +0800, Xiangliang Yu wrote:
> This patch set will support SATA port multiplier(PM) in LIBSAS. 
> 
> LIBSAS is need to implement several key handling to support SATA PM:
> First,low level driver notify libsas that SATA PM is attached to HBA port.
> Then, LIBSAS will need to schedule SATA PMP error handler to scan SATA device
> that is attached to PM, so we must implemet port softreset and PMP reset 
> handling.
> If find SATA devices, we should add the devices into SAS transport layer.
> In order to find SAS domain device we must implemet device type transformation
> : scsi device -> (port number) -> ata device -> domain device. Then, we can
> execute IO operation.
> 
> In these patches, patch 1 is change SATA error handler.
> And patch 2 will add SATA device into SAS layer and implement device type
> transformation. Patch 3 implement SATA functional interface in mvsas.

Please properly thread the patchset from the next posting.

Dan, can you please take a look at this?

Thanks.

-- 
tejun

Re: [PATCH 0/3] libsas: add support for port multiplier

[Dan Williams]

On Fri, May 2, 2014 at 8:36 AM, Tejun Heo <tj@kernel.org> wrote:
> On Thu, Apr 24, 2014 at 09:27:03PM +0800, Xiangliang Yu wrote:
>> This patch set will support SATA port multiplier(PM) in LIBSAS.
>>
>> LIBSAS is need to implement several key handling to support SATA PM:
>> First,low level driver notify libsas that SATA PM is attached to HBA port.
>> Then, LIBSAS will need to schedule SATA PMP error handler to scan SATA device
>> that is attached to PM, so we must implemet port softreset and PMP reset
>> handling.
>> If find SATA devices, we should add the devices into SAS transport layer.
>> In order to find SAS domain device we must implemet device type transformation
>> : scsi device -> (port number) -> ata device -> domain device. Then, we can
>> execute IO operation.
>>
>> In these patches, patch 1 is change SATA error handler.
>> And patch 2 will add SATA device into SAS layer and implement device type
>> transformation. Patch 3 implement SATA functional interface in mvsas.
>
> Please properly thread the patchset from the next posting.
>
> Dan, can you please take a look at this?
>

Yeah, it's on my plate to look at...