Re: [Qemu-devel] [PATCH] megasas: static SAS addresses

[Hannes Reinecke <hare@suse.de>]

(Bad style to reply to my own post. I know.)

On 08/01/2012 11:12 AM, Hannes Reinecke wrote:
> This patch introduces a new property 'sas_address' which
> allows the user to specify the SAS address for the HBA.
> The default address it taken from the qumranet IEEE number
> and the pci slot address. That ensures it'll be unique
> and reproduceable locally.
> 
> The port addresses are now calculated based on the magic
> number 0x1221 (which is found in real hardware, too) plus
> the device number.
> 
> Signed-off-by: Hannes Reinecke <hare@suse.de>
> Cc: Paolo Bonzini <pbonzini@redhat.com>
> Cc: Andreas Faerber <afaerber@suse.de>
> Cc: Anthony Liguori <aliguori@codemonkey.ws>
> Cc: Alexander Graf <agraf@suse.de>
> ---
>  hw/megasas.c |   63 ++++++++++++++++++++++++++++++++++++++++++---------------
>  hw/mfi.h     |    1 +
>  2 files changed, 47 insertions(+), 17 deletions(-)
> 
> diff --git a/hw/megasas.c b/hw/megasas.c
> index 9a0eab1..e709d4d 100644
> --- a/hw/megasas.c
> +++ b/hw/megasas.c
> @@ -38,6 +38,8 @@
>  #define MEGASAS_MAX_SECTORS 0xFFFF      /* No real limit */
>  #define MEGASAS_MAX_ARRAYS 128
>  
> +#define IEEE_COMPANY_QUMRANET      0x001A4AULL
> +

Something worth of note:
To generate a valid SAS address I need an IEEE number.

I seem to remember Qumranet donated their PCI id for KVM use.
I don't actually know if that donation extends to the IEEE number,
too. If not then obviously I would need to use another one here.

Who would be best in a position to answer this?

Paolo? Someone at RH should know ...

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      zSeries & Storage
hare@suse.de			      +49 911 74053 688
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