Hi all.
We developped a first version PV SCSI.
(without a FC-SCSI driver by Kamada-san)
The change point is the following:
 * implement python code
 -> attach, detach, list support.
 Usage
 # xm scsihost-attach <Domain> scsi <SCSIHostno>
 # xm scsihost-detach <Domain> <SCSIHostno>
 # xm scsihost-list <Domain>
 <SCSIHostno> = scsi host number on Dom0
 -> python config
 scsihost = ['scsi,1', 'type,num']
 type = "scsi" (type=fc is current work by Kamada-san)
 num = scsi host number on Dom0
 * performance tunning
 When many disks are connected with 1 HBA, many disk's I/O request 
 will be issued to 1 RING.
 In this case, it becomes RING_FULL at once. 
 We made two RINGs (like a VNIF) because IO request must not save in RING.
 RING is used only to pass the command.
Best regards,
Tomonari Horikoshi
Tomonari Horikoshi wrote:----------------------
Sent: 2007年5月16日 18:08:27 +0900
Subject: [Xen-devel] [RFC] pv-scsi driver (scsiback/scsifront)
>
> Hi all.
>
> We developped a pv-scsi driver that we refered Fujita-san's scsi-driver
> and blkback.
> (see, http://www.xensource.com/files/xensummit_4/Xen_Summit_8_Matsumoto.pdf)
>
> The pv-scsi driver's feature is as follow:
> * Guest has dedicated SCSI-HBAs of Dom0.
> * Guest can send scsi_cdb to the HBAs.
> * Guest recognises the HBAs from hostno of xenstore.
>
> Currentlly, We are developping FC version based on this.
>
> * Future work:
> * implement python code
> * performance tunning
> * attach, detach
> * suspend, resume
>
snip ...
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