Greetings: Welcome to v2. This series adds support to mlx4 for the netdev-genl API which makes it much easier for users and user programs to map NAPI IDs back to ifindexes, queues, and IRQs. This is extremely useful for a number of use cases, including epoll-based busy poll. In addition, this series includes a patch to generate per-queue statistics using the netlink API, as well. To facilitate the stats, patch 1/3 makes use of an existing field, "dropped" which was already being exported in the ethtool stats by the driver, but was never incremented. As of patch 1/3, it is now being incremented by the driver in an appropriate place and used in patch 3/3 as alloc_fail. Please note: I do not have access to mlx4 hardware, but I've been working closely with Martin Karsten from University of Waterloo (CC'd) who has very graciously tested my patches on their mlx4 hardware (hence his Tested-by attribution in each commit). His latest research work is particularly interesting [1] and this series helps to support that (and future) work. Martin has re-tested this v2 using Jakub's tool [2] and the stats.pkt_byte_sum and stats.qstat_by_ifindex tests passed. [1]: https://dl.acm.org/doi/pdf/10.1145/3626780 [2]: https://lore.kernel.org/lkml/20240423175718.4ad4dc5a@xxxxxxxxxx/ Thanks, Joe v1 -> v2: - Patch 1/3 now initializes dropped to 0. - Patch 2/3 fix use of uninitialized qtype warning. - Patch 3/3 includes several changes: - mlx4_get_queue_stats_rx and mlx4_get_queue_stats_tx check if i is valid before proceeding. - All initialization to 0xff for stats fields has been omit. The network stack does this before calling into the driver functions, so I've adjusted the driver functions to only set values if there is data to set, leaving the network stack's 0xff in place if not. - mlx4_get_base_stats set all stat fields to 0 individually if there are RX and TX queues. Joe Damato (3): net/mlx4: Track RX allocation failures in a stat net/mlx4: link NAPI instances to queues and IRQs net/mlx4: support per-queue statistics via netlink drivers/net/ethernet/mellanox/mlx4/en_cq.c | 14 ++++ .../net/ethernet/mellanox/mlx4/en_netdev.c | 79 +++++++++++++++++++ drivers/net/ethernet/mellanox/mlx4/en_port.c | 5 +- drivers/net/ethernet/mellanox/mlx4/en_rx.c | 4 +- drivers/net/ethernet/mellanox/mlx4/mlx4_en.h | 1 + 5 files changed, 101 insertions(+), 2 deletions(-) -- 2.25.1
