[PATCH v3 next 0/7] net/vmxnet3: upgrade to version 7

[Ferruh Yigit]

On 4/28/2023 8:10 AM, Ronak Doshi wrote:
> vmxnet3 emulation has recently added several new features including
> support for uniform passthrough(UPT). To make UPT work vmxnet3 has
> to be enhanced as per the new specification. 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 7.
> - 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 7 comparison
>   and updates Copyright information.
> 
> Patch 2:
>   This patch adds new capability registers to fine control enablement of
>   individual features based on emulation and passthrough.
> 
> Patch 3:
>   This patch adds support for large passthrough BAR register.
> 
> Patch 4:
>   This patch introduces new command to set ring buffer sizes to pass this
>   information to the hardware.
> 
> Patch 5:
>   For better performance, hardware has a requirement to limit number of TSO
>   descriptors. This patch adds that support.
> 
> Patch 6:
>   Avoid updating rxprod register when in UPT for performance reasons.
> 
> Patch 7:
>   With all vmxnet3 version 7 changes incorporated in the vmxnet3 driver,
>   with this patch, the driver can configure emulation to run at vmxnet3
>   version 7.
> 
> Changes v2->v3:
> - removed reference to old performance document
> 
> Changes in v2:
> - modified the title to include "net/"
> - addressed checkpatch complaints and some typo in patch commits
> - removed RTE_ETH_DEV_CAPA_PASS_THRU as it was specific to vmxnet3
> - added new features information in release notes
> - updated feature related information in vmxnet3 driver documentation
> 
> Ronak Doshi (7):
>   net/vmxnet3: prepare for version 7 changes
>   net/vmxnet3: add support for capability registers
>   net/vmxnet3: add support for large passthrough BAR register
>   net/vmxnet3: add command to set ring buffer sizes
>   net/vmxnet3: limit number of TXDs used for TSO packet
>   net/vmxnet3: avoid updating rxprod register frequently
>   net/vmxnet3: update to version 7

Series applied to dpdk-next-net/main, thanks.