mbox series

[v5,0/5] net/gve: RSS Support for GVE Driver

Message ID 20240131221308.2208815-1-joshwash@google.com (mailing list archive)
Headers
Series net/gve: RSS Support for GVE Driver |

Message

Joshua Washington Jan. 31, 2024, 10:13 p.m. UTC 
  This patch series introduces RSS support for the GVE poll-mode driver.
This series includes implementations of the following eth_dev_ops:

1) rss_hash_update
2) rss_hash_conf_get
3) reta_query
4) reta_update

In rss_hash_update, the GVE driver supports the following RSS hash
types:

* RTE_ETH_RSS_IPV4
* RTE_ETH_RSS_NONFRAG_IPV4_TCP
* RTE_ETH_RSS_NONFRAG_IPV4_UDP
* RTE_ETH_RSS_IPV6
* RTE_ETH_RSS_IPV6_EX
* RTE_ETH_RSS_NONFRAG_IPV6_TCP
* RTE_ETH_RSS_NONFRAG_IPV6_UDP
* RTE_ETH_RSS_IPV6_TCP_EX
* RTE_ETH_RSS_IPV6_UDP_EX

The hash key is 40B, and the lookup table has 128 entries. These values
are not configurable in this implementation.

In general, the DPDK driver expects the RSS hash configuration to be set
with a key before the redriection table is set up. When the RSS hash is
configured, a default redirection table is generated based on the number
of queues. When the device is re-configured, the redirection table is
reset to the default value based on the queue count.

An important note is that the gVNIC device expects 32 bit integers for
RSS redirection table entries, while the RTE API uses 16 bit integers.
However, this is unlikely to be an issue, as these values represent
receive queues, and the gVNIC device does not support anywhere near 64K
queues.

This series also updates the corresponding feature matrix ertries and
documentation as it pertains to RSS support in the GVE driver.

v2:
Add commmit messages for patches with it missing, and other checkpatches
fixes.

Note: There is a warning about complex macros being parenthesized that
does not seem to be well-founded.

v3:
Fix build warnings that come up on certain distros.

v4:
Fix formatting in gve_adminq.c

v5:
Update commit messages to comply with check-git-log.
Fold feature matrix and documentation updates into relevant commits.

Joshua Washington (5):
  net/gve: expose RSS offload support in dev info
  net/gve: add RSS adminq command
  net/gve: add gve RSS library
  net/gve: add RSS configuration update support
  net/gve: add RSS redirection table update support

 doc/guides/nics/features/gve.ini  |   2 +
 doc/guides/nics/gve.rst           |  28 +++-
 drivers/net/gve/base/gve.h        |  15 ++
 drivers/net/gve/base/gve_adminq.c |  58 ++++++++
 drivers/net/gve/base/gve_adminq.h |  21 +++
 drivers/net/gve/gve_ethdev.c      | 231 +++++++++++++++++++++++++++++-
 drivers/net/gve/gve_ethdev.h      |  17 +++
 drivers/net/gve/gve_rss.c         | 206 ++++++++++++++++++++++++++
 drivers/net/gve/gve_rss.h         | 107 ++++++++++++++
 drivers/net/gve/meson.build       |   1 +
 10 files changed, 677 insertions(+), 9 deletions(-)
 create mode 100644 drivers/net/gve/gve_rss.c
 create mode 100644 drivers/net/gve/gve_rss.h