kernel/drivers/net/ethernet/intel/idpf/Kconfig, branch linux-6.18.y

idpf: prepare structures to support XDP

2025-09-08T18:05:17Z

Extend basic structures of the driver (e.g. 'idpf_vport', 'idpf_*_queue', 'idpf_vport_user_config_data') by adding members necessary to support XDP. Add extra XDP Tx queues needed to support XDP_TX and XDP_REDIRECT actions without interfering with regular Tx traffic. Also add functions dedicated to support XDP initialization for Rx and Tx queues and call those functions from the existing algorithms of queues configuration. Signed-off-by: Michal Kubiak Co-developed-by: Alexander Lobakin Signed-off-by: Alexander Lobakin Tested-by: Ramu R Signed-off-by: Tony Nguyen

idpf: add initial PTP support

2025-05-16T16:13:02Z

PTP feature is supported if the VIRTCHNL2_CAP_PTP is negotiated during the capabilities recognition. Initial PTP support includes PTP initialization and registration of the clock. Reviewed-by: Alexander Lobakin Reviewed-by: Vadim Fedorenko Reviewed-by: Willem de Bruijn Reviewed-by: Jacob Keller Signed-off-by: Milena Olech Tested-by: Mina Almasry Tested-by: Samuel Salin Signed-off-by: Tony Nguyen

idpf: use libeth Rx buffer management for payload buffer

2024-07-10T17:48:45Z

idpf uses Page Pool for data buffers with hardcoded buffer lengths of 4k for "classic" buffers and 2k for "short" ones. This is not flexible and does not ensure optimal memory usage. Why would you need 4k buffers when the MTU is 1500? Use libeth for the data buffers and don't hardcode any buffer sizes. Let them be calculated from the MTU for "classics" and then divide the truesize by 2 for "short" ones. The memory usage is now greatly reduced and 2 buffer queues starts make sense: on frames <= 1024, you'll recycle (and resync) a page only after 4 HW writes rather than two. Signed-off-by: Alexander Lobakin Signed-off-by: Tony Nguyen

idpf: remove legacy Page Pool Ethtool stats

2024-07-10T17:44:59Z

Page Pool Ethtool stats are deprecated since the Netlink Page Pool interface introduction. idpf receives big changes in Rx buffer management, including &page_pool layout, so keeping these deprecated stats does only harm, not speaking of that CONFIG_IDPF selects CONFIG_PAGE_POOL_STATS unconditionally, while the latter is often turned off for better performance. Remove all the references to PP stats from the Ethtool code. The stats are still available in their full via the generic Netlink interface. Reviewed-by: Przemek Kitszel Reviewed-by: Jacob Keller Signed-off-by: Alexander Lobakin Signed-off-by: Tony Nguyen

idpf: reuse libeth's definitions of parsed ptype structures

2024-07-10T17:43:57Z

idpf's in-kernel parsed ptype structure is almost identical to the one used in the previous Intel drivers, which means it can be converted to use libeth's definitions and even helpers. The only difference is that it doesn't use a constant table (libie), rather than one obtained from the device. Remove the driver counterpart and use libeth's helpers for hashes and checksums. This slightly optimizes skb fields processing due to faster checks. Also don't define big static array of ptypes in &idpf_vport -- allocate them dynamically. The pointer to it is anyway cached in &idpf_rx_queue. Reviewed-by: Przemek Kitszel Reviewed-by: Jacob Keller Signed-off-by: Alexander Lobakin Signed-off-by: Tony Nguyen

idpf: compile singleq code only under default-n CONFIG_IDPF_SINGLEQ

2024-07-10T17:42:26Z

Currently, all HW supporting idpf supports the singleq model, but none of it advertises it by default, as splitq is supported and preferred for multiple reasons. Still, this almost dead code often times adds hotpath branches and redundant cacheline accesses. While it can't currently be removed, add CONFIG_IDPF_SINGLEQ and build the singleq code only when it's enabled manually. This corresponds to -10 Kb of object code size and a good bunch of hotpath checks. idpf_is_queue_model_split() works as a gate and compiles out to `true` when the config option is disabled. Reviewed-by: Przemek Kitszel Signed-off-by: Alexander Lobakin Signed-off-by: Tony Nguyen