Re: [dpdk-dev] [PATCH v2 1/2] ixgbe: VF supports mailbox interruption for PF link up/down

[Bruce Richardson <bruce.richardson@intel.com>]

On Wed, Jun 01, 2016 at 09:53:08AM +0800, Wenzhuo Lu wrote:
> In this scenario, kernel PF + DPDK VF, when PF finds the link
> state changes, up -> down or down -> up, it will send a
> message to VF by mailbox. This link state change may be
> triggered by PHY disconnection/reconnection, configuration
> like *ifconfig down/up* or interface parameter, like MTU,
> change.
> This patch enables the support of the mailbox interruption,
> so VF can receive the message of link up/down.
> After VF receives this message, VF port need to be reset to
> recover. So the handler of this message registers a reset
> callback to let APP reset the VF port.
> 
Hi Wenzhuo,

I'm a little unclear as to the last paragraph of this message. Does the
app configure the callback to handle the reset, or does the driver set
up a callback automatically and handle the event itself? [In other words,
who/what is the "handler" in the final sentence, the driver or the app?]

Thanks,
/Bruce