Re: iSER API's

This might be a good work item for SNIA IPS WG, provided there was 
enough interest.



Eddy Quicksall wrote:

> Here is an example of what I mean when I say API:
>  
>
> ISER_SendControl is used to send SCSI commands, SCSI TMF's, 
> unsolicited SCSI Data-out, SCSI Responses and iSCSI Asyncronous Message.
>
>  
>
> ISER_RC_T ISER_SendControl(
>
> ISER_CONNECTION_HANDLE_T connectionHandle,
>
> pISCSI_HEADER pHeader,
>
> pISER_PDU_QUALIFIERS pPDUQualifiers );
>
>  
>
> Returns: ISER_GOOD or ISER_FAILED
>
>  
>
> connectionHandle The connection handle returned by ISER_Connect
>
> pHeader              A pointer to an iSCSI header.
>
> pPDUQualifiers     A pointer to a set of qualifiers. The only 
> qualifiers that need to be actually set are the ones relevant to the 
> iSCSI header.
>
>     ----- Original Message -----
>     From: Dan Bar Dov <mailto:[email protected]>
>     To: John Hufferd <mailto:[email protected]> ; Eddy Quicksall
>     <mailto:[email protected]> ; [email protected]
>     <mailto:[email protected]>
>     Sent: Sunday, January 08, 2006 8:50 PM
>     Subject: RE: [Ips] iSER API's
>
>     Indeed on Linux the direction is towards a generic RDMA interface.
>     CMA provides a generic CM abstraction, and the ib_verbs API is
>     planned to extend over iWARP one way or another.
>     The DM was deemed unnecessary, the API between iSCSI & SCSI and
>     the underlying iSER enforced redesign of the iSER API to conform
>     with iSCSI and SCSI rather then implement yet another layer
>     between iSER and iSCSI/SCSI (namely DM).
>      
>     Dan
>
>         ------------------------------------------------------------------------
>         From: [email protected] <mailto:[email protected]>
>         [mailto:[email protected]] On Behalf Of John Hufferd
>         Sent: Friday, January 06, 2006 11:18 PM
>         To: Eddy Quicksall; [email protected]
>         Subject: RE: [Ips] iSER API's
>
>         Eddy,
>
>         What APIs are you asking about?  The SCSI CLASS Driver to the
>         Device Driver (Mini Port Driver) should have the same
>         interfaces for iSER as it is available for iSCSI.  If you mean
>         between the Device Driver (Mini Port Driver) and the RNIC,
>         that will probably be the RNIC vendors interface if they have
>         implemented all or part of the iSER or Data Mover in the RNIC
>         itself, or the RNIC vendor's interfaces to their version of
>         the verbs (at least until the OS implements its own RDMA
>         interfaces that implement the RDMA verbs).
>
>          
>
>         I believe that, over time, most OSs will have generic RDMA
>         interfaces, which can be use by all certified RNIC hardware,
>         and any application (user space or kernel space); in that case
>         the iSER module will probably interface to that OS's RDMA
>         interfaces.
>
>          
>
>         .
>
>         .
>
>         .
>
>         John L Hufferd
>
>         Sr. Executive Director of Technology
>
>         Brocade Communications Systems, Inc
>
>         [email protected] <mailto:[email protected]>
>
>         Office Phone: (408) 333-5244; eFAX: (408) 904-4688
>
>         Alt Office Phone: (408) 997-6136; Cell: (408) 627-9606
>
>          
>
>         ------------------------------------------------------------------------
>
>         From: [email protected] [mailto:[email protected]] On
>         Behalf Of Eddy Quicksall
>         Sent: Friday, January 06, 2006 11:42 AM
>         To: [email protected]
>         Subject: [Ips] iSER API's
>
>          
>
>         Is there any work afoot to design some standard iSER API's?
>
>          
>
>         Eddy
>

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