netdev - Re: [net-next 6/9] ice: enable initial devlink support

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Date:   Mon, 23 Mar 2020 10:09:41 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Cc:     davem@...emloft.net, Jacob Keller <jacob.e.keller@...el.com>,
        netdev@...r.kernel.org, nhorman@...hat.com, sassmann@...hat.com,
        Jesse Brandeburg <jesse.brandeburg@...el.com>,
        Andrew Bowers <andrewx.bowers@...el.com>
Subject: Re: [net-next 6/9] ice: enable initial devlink support

On Sat, 21 Mar 2020 01:10:25 -0700 Jeff Kirsher wrote:
> From: Jacob Keller <jacob.e.keller@...el.com>
> 
> Begin implementing support for the devlink interface with the ice
> driver.
> 
> The pf structure is currently memory managed through devres, via
> a devm_alloc. To mimic this behavior, after allocating the devlink
> pointer, use devm_add_action to add a teardown action for releasing the
> devlink memory on exit.
> 
> The ice hardware is a multi-function PCIe device. Thus, each physical
> function will get its own devlink instance. This means that each
> function will be treated independently, with its own parameters and
> configuration. This is done because the ice driver loads a separate
> instance for each function.
> 
> Due to this, the implementation does not enable devlink to manage
> device-wide resources or configuration, as each physical function will
> be treated independently. This is done for simplicity, as managing
> a devlink instance across multiple driver instances would significantly
> increase the complexity for minimal gain.
> 
> Signed-off-by: Jacob Keller <jacob.e.keller@...el.com>
> Reviewed-by: Jesse Brandeburg <jesse.brandeburg@...el.com>
> Tested-by: Andrew Bowers <andrewx.bowers@...el.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>

Reviewed-by: Jakub Kicinski <kuba@...nel.org>

Thanks for posting these!