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. Joshua Washington (7): net/gve: fully expose RSS offload support in dev_info net/gve: RSS adminq command changes net/gve: add gve_rss library for handling RSS-related behaviors net/gve: RSS configuration update support net/gve: RSS redirection table update support net/gve: update gve.ini with RSS capabilities net/gve: update GVE documentation with RSS support doc/guides/nics/features/gve.ini | 3 + doc/guides/nics/gve.rst | 16 ++- drivers/net/gve/base/gve.h | 15 ++ drivers/net/gve/base/gve_adminq.c | 59 ++++++++ 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, 667 insertions(+), 9 deletions(-) create mode 100644 drivers/net/gve/gve_rss.c create mode 100644 drivers/net/gve/gve_rss.h -- 2.43.0.429.g432eaa2c6b-goog
