Re: [dpdk-dev] [PATCH v2 9/9] pci: implement automatic bind/unbind

[Ivan Boule <ivan.boule@6wind.com>]

On 01/29/2016 03:49 PM, David Marchand wrote:
> Reuse pci hook to implement automatic bind / unbind.
> The more I look at this, the more I think this should go to the PMDs
> themselves (with options per devices to control this), with EAL offering
> helpers to achieve this.

This sounds good to me.
As a basic software design rule, the decisions of using a given resource 
and/or performing a given operation (the intelligent knowledge) should 
systematically be taken at the maximum possible software level.
Conversely, such high-level decisions should be offered the most 
appropriate low-level services to facilitate their implementation.
In the case we are considering here - the need to bind a PCI device - 
the Poll Mode Driver of that device is the only component which actually 
knows.
Conversely, the EAL layer is the best place where to implement the
OS-dependent and/or architecture-dependent device binding services to be
invoked by PMDs at PCI device probing time.

My 2 cents,
Ivan

-- 
Ivan Boule
6WIND Development Engineer