netdev - Re: [PATCH net-next v5] net/ncsi: Extend NC-SI Netlink interface to allow user space to send NC-SI command

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Date:   Wed, 10 Oct 2018 21:30:48 +0000
From:   Vijay Khemka <vijaykhemka@...com>
To:     "Justin.Lee1@...l.com" <Justin.Lee1@...l.com>,
        "sam@...dozajonas.com" <sam@...dozajonas.com>,
        "joel@....id.au" <joel@....id.au>
CC:     "linux-aspeed@...ts.ozlabs.org" <linux-aspeed@...ts.ozlabs.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "openbmc@...ts.ozlabs.org" <openbmc@...ts.ozlabs.org>,
        Amithash Prasad <amithash@...com>,
        "christian@....nu" <christian@....nu>
Subject: Re: [PATCH net-next v5] net/ncsi: Extend NC-SI Netlink interface to
 allow user space to send NC-SI command



On 10/10/18, 11:12 AM, "Justin.Lee1@...l.com" <Justin.Lee1@...l.com> wrote:

    The new command (NCSI_CMD_SEND_CMD) is added to allow user space application
    to send NC-SI command to the network card.
    Also, add a new attribute (NCSI_ATTR_DATA) for transferring request and response.
    
    The work flow is as below. 
    
    Request:
    User space application
    	-> Netlink interface (msg)
    	-> new Netlink handler - ncsi_send_cmd_nl()
    	-> ncsi_xmit_cmd()
    
    Response:
    Response received - ncsi_rcv_rsp()
    	-> internal response handler - ncsi_rsp_handler_xxx()
    	-> ncsi_rsp_handler_netlink()
    	-> ncsi_send_netlink_rsp ()
    	-> Netlink interface (msg)
    	-> user space application
    
    Command timeout - ncsi_request_timeout()
    	-> ncsi_send_netlink_timeout ()
    	-> Netlink interface (msg with zero data length)
    	-> user space application
    
    Error:
    Error detected
    	-> ncsi_send_netlink_err ()
    	-> Netlink interface (err msg)
    	-> user space application
    
    
    Signed-off-by: Justin Lee <justin.lee1@...l.com> 

  Reviewed-by : Vijay Khemka <vijaykhemka@...com>