netdev - Re: [PATCH v4 net-next 0/4] vmxnet3: upgrade to version 4

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Date:   Thu, 28 May 2020 16:27:08 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     doshir@...are.com
Cc:     netdev@...r.kernel.org, pv-drivers@...are.com, kuba@...nel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 net-next 0/4] vmxnet3: upgrade to version 4

From: Ronak Doshi <doshir@...are.com>
Date: Thu, 28 May 2020 14:53:18 -0700

> vmxnet3 emulation has recently added several new features which includes
> offload support for tunnel packets, support for new commands the driver
> can issue to emulation, change in descriptor fields, etc. This patch
> series extends the vmxnet3 driver to leverage these new features.
> 
> Compatibility is maintained using existing vmxnet3 versioning mechanism as
> follows:
>  - new features added to vmxnet3 emulation are associated with new vmxnet3
>    version viz. vmxnet3 version 4.
>  - emulation advertises all the versions it supports to the driver.
>  - during initialization, vmxnet3 driver picks the highest version number
>  supported by both the emulation and the driver and configures emulation
>  to run at that version.
> 
> In particular, following changes are introduced:
> 
> Patch 1:
>   This patch introduces utility macros for vmxnet3 version 4 comparison
>   and updates Copyright information.
> 
> Patch 2:
>   This patch implements get_rss_hash_opts and set_rss_hash_opts methods
>   to allow querying and configuring different Rx flow hash configurations
>   which can be used to support UDP/ESP RSS.
> 
> Patch 3:
>   This patch introduces segmentation and checksum offload support for
>   encapsulated packets. This avoids segmenting and calculating checksum
>   for each segment and hence gives performance boost.
> 
> Patch 4:
>   With all vmxnet3 version 4 changes incorporated in the vmxnet3 driver,
>   with this patch, the driver can configure emulation to run at vmxnet3
>   version 4.
> 
> Changes in v3 -> v4:
>    - Replaced BUG_ON() with WARN_ON_ONCE()
 ...

Series applied, thanks.