Messages in this thread | | | From | Vladimir Oltean <> | Subject | [PATCH v2 net-next 00/12] Add tc-mqprio and tc-taprio support for preemptible traffic classes | Date | Sun, 19 Feb 2023 15:52:56 +0200 |
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The last RFC in August 2022 contained a proposal for the UAPI of both TSN standards which together form Frame Preemption (802.1Q and 802.3): https://patchwork.kernel.org/project/netdevbpf/cover/20220816222920.1952936-1-vladimir.oltean@nxp.com/
It wasn't clear at the time whether the 802.1Q portion of Frame Preemption should be exposed via the tc qdisc (mqprio, taprio) or via some other layer (perhaps also ethtool like the 802.3 portion, or dcbnl), even though the options were discussed extensively, with pros and cons: https://patchwork.kernel.org/project/netdevbpf/patch/20220816222920.1952936-3-vladimir.oltean@nxp.com/
So the 802.3 portion got submitted separately and finally was accepted: https://patchwork.kernel.org/project/netdevbpf/cover/20230119122705.73054-1-vladimir.oltean@nxp.com/
leaving the only remaining question: how do we expose the 802.1Q bits?
This series proposes that we use the Qdisc layer, through separate (albeit very similar) UAPI in mqprio and taprio, and that both these Qdiscs pass the information down to the offloading device driver through the common mqprio offload structure (which taprio also passes).
Implementations are provided for the NXP LS1028A on-board Ethernet (enetc, felix).
Some patches should have maybe belonged to separate series, leaving here only patches 09/12 - 12/12, for ease of review. That may be true, however due to a perceived lack of time to wait for the prerequisite cleanup to be merged, here they are all together.
Changes in v2: - add missing EXPORT_SYMBOL_GPL(ethtool_dev_mm_supported) - slightly reword some commit messages - move #include <linux/ethtool_netlink.h> to the respective patch in mqprio - remove self-evident comment "only for dump and offloading" in mqprio
v1 at: https://patchwork.kernel.org/project/netdevbpf/cover/20230216232126.3402975-1-vladimir.oltean@nxp.com/
Vladimir Oltean (12): net: enetc: rename "mqprio" to "qopt" net: mscc: ocelot: add support for mqprio offload net: dsa: felix: act upon the mqprio qopt in taprio offload net: ethtool: fix __ethtool_dev_mm_supported() implementation net: ethtool: create and export ethtool_dev_mm_supported() net/sched: mqprio: simplify handling of nlattr portion of TCA_OPTIONS net/sched: mqprio: add extack to mqprio_parse_nlattr() net/sched: mqprio: add an extack message to mqprio_parse_opt() net/sched: mqprio: allow per-TC user input of FP adminStatus net/sched: taprio: allow per-TC user input of FP adminStatus net: mscc: ocelot: add support for preemptible traffic classes net: enetc: add support for preemptible traffic classes
drivers/net/dsa/ocelot/felix_vsc9959.c | 44 ++++- drivers/net/ethernet/freescale/enetc/enetc.c | 31 ++- drivers/net/ethernet/freescale/enetc/enetc.h | 1 + .../net/ethernet/freescale/enetc/enetc_hw.h | 4 + drivers/net/ethernet/mscc/ocelot.c | 51 +++++ drivers/net/ethernet/mscc/ocelot.h | 2 + drivers/net/ethernet/mscc/ocelot_mm.c | 56 ++++++ include/linux/ethtool_netlink.h | 6 + include/net/pkt_sched.h | 1 + include/soc/mscc/ocelot.h | 6 + include/uapi/linux/pkt_sched.h | 17 ++ net/ethtool/mm.c | 25 ++- net/sched/sch_mqprio.c | 182 +++++++++++++++--- net/sched/sch_mqprio_lib.c | 14 ++ net/sched/sch_mqprio_lib.h | 2 + net/sched/sch_taprio.c | 65 +++++-- 16 files changed, 460 insertions(+), 47 deletions(-)
-- 2.34.1
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