Re: [RFC 02/10] IB/hfi-vnic: Virtual Network Interface Controller (VNIC) Bus driver

From: Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
To: "Vishwanathapura,
	Niranjana"
	<niranjana.vishwanathapura-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Cc: "ira.weiny" <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
	Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
	linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Dennis Dalessandro
	<dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Subject: Re: [RFC 02/10] IB/hfi-vnic: Virtual Network Interface Controller (VNIC) Bus driver
Date: Thu, 24 Nov 2016 09:15:45 -0700	[thread overview]
Message-ID: <20161124161545.GA20818@obsidianresearch.com> (raw)
In-Reply-To: <20161124000825.GA73280-wPcXA7LoDC+1XWohqUldA0EOCMrvLtNR@public.gmane.org>

On Wed, Nov 23, 2016 at 04:08:25PM -0800, Vishwanathapura, Niranjana wrote:

> In order to pass the hfi function pointers to the hfi_vnic ULP, I can,
> a) Have hfi_vnic ULP define an interface API for hfi1 driver to call to
> register its callback (as you pointed). Unfortunately there will be a module
> dependency here.
> Or,

That is probably backwards

> b) Add a new member ‘struct vnic_ops’ either to the ib_device structure or
> ib_port_immutable structure. As it is hfi1 specific, only hfi1 driver will
> set it. No module dependency here.

You can add a hfi1_get_vnic_ops(struct ib_device *) and implement it
in your module..

> And will move the hfi_vnic module under
> ‘drivers/infiniband/ulp/hfi_vnic’.

I would prefer drivers/net/ethernet

This is clearly not a ULP since it doesn't use verbs.

Jason
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