[PATCH v2 net-next 0/8] vmxnet3: upgrade to version 7

Ronak Doshi
2022-06-07T08:45:53Z

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 adds support for out of order rx completion processing.

Patch 5:
This patch introduces new command to set ring buffer sizes to pass this
information to the hardware.

Patch 6:
For better performance, hardware has a requirement to limit number of TSO
descriptors. This patch adds that support.

Patch 7:
With vmxnet3 version 7, new descriptor fields are used to indicate
encapsulation offload.

Patch 8:
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 in v2:
- use local rss_fields variable for the rss capability checks in patch 2

Ronak Doshi (8):
vmxnet3: prepare for version 7 changes
vmxnet3: add support for capability registers
vmxnet3: add support for large passthrough BAR register
vmxnet3: add support for out of order rx completion
vmxnet3: add command to set ring buffer sizes
vmxnet3: limit number of TXDs used for TSO packet
vmxnet3: use ext1 field to indicate encapsulated packet
vmxnet3: update to version 7

drivers/net/vmxnet3/Makefile | 2 +-
drivers/net/vmxnet3/upt1_defs.h | 2 +-
drivers/net/vmxnet3/vmxnet3_defs.h | 80 ++++++++--
drivers/net/vmxnet3/vmxnet3_drv.c | 291 ++++++++++++++++++++++++++++++----
drivers/net/vmxnet3/vmxnet3_ethtool.c | 116 ++++++++++++--
drivers/net/vmxnet3/vmxnet3_int.h | 24 ++-
6 files changed, 457 insertions(+), 58 deletions(-)

--
2.11.0