[SLOF] [PATCH] virtio-scsi: Allow LUNs bigger than 255

[Alexey Kardashevskiy]

On 18/07/17 22:11, Thomas Huth wrote:
> The virtio-scsi device expects LUNs according to a "Single level LUN
> structure" as defined in the "SCSI Architecture Model" specification.
> SLOF currently only uses the "Single level LUN structure using
> peripheral device addressing method" which provides the possibility
> to specify up to 256 different LUNs.
> To be able to use LUNs greater than 255, the "Single level LUN structure
> using flat space addressing method" has to be used instead. This can
> be done by setting the top-most bits to "01" instead of "00" in the first
> byte of the two LUN bytes.
> 
> Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1431584
> Signed-off-by: Thomas Huth <thuth at redhat.com>
> ---
>  board-qemu/slof/virtio-scsi.fs | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/board-qemu/slof/virtio-scsi.fs b/board-qemu/slof/virtio-scsi.fs
> index d52741e..d7ce3cc 100644
> --- a/board-qemu/slof/virtio-scsi.fs
> +++ b/board-qemu/slof/virtio-scsi.fs
> @@ -144,6 +144,7 @@ scsi-open
>  ;
>  
>  : dev-generate-srplun ( target lun-id -- srplun )
> +    dup ff > IF 4000 or THEN    \ Use the LUN "flat space addressing method"
>      swap 0100 or 10 << or 20 <<
>  ;
>  
> 

Thanks, applied.

I am still digesting PCI patches.


-- 
Alexey