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273 lines
8.0 KiB
273 lines
8.0 KiB
/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */ |
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/* Copyright (C) 2018 Netronome Systems, Inc. */ |
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#ifndef __NFP_ABM_H__ |
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#define __NFP_ABM_H__ 1 |
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#include <linux/bits.h> |
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#include <linux/list.h> |
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#include <linux/radix-tree.h> |
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#include <net/devlink.h> |
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#include <net/pkt_cls.h> |
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#include <net/pkt_sched.h> |
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/* Dump of 64 PRIOs and 256 REDs seems to take 850us on Xeon v4 @ 2.20GHz; |
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* 2.5ms / 400Hz seems more than sufficient for stats resolution. |
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*/ |
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#define NFP_ABM_STATS_REFRESH_IVAL (2500 * 1000) /* ns */ |
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#define NFP_ABM_LVL_INFINITY S32_MAX |
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struct nfp_app; |
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struct nfp_net; |
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#define NFP_ABM_PORTID_TYPE GENMASK(23, 16) |
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#define NFP_ABM_PORTID_ID GENMASK(7, 0) |
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/* The possible actions if thresholds are exceeded */ |
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enum nfp_abm_q_action { |
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/* mark if ECN capable, otherwise drop */ |
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NFP_ABM_ACT_MARK_DROP = 0, |
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/* mark if ECN capable, otherwise goto QM */ |
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NFP_ABM_ACT_MARK_QUEUE = 1, |
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NFP_ABM_ACT_DROP = 2, |
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NFP_ABM_ACT_QUEUE = 3, |
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NFP_ABM_ACT_NOQUEUE = 4, |
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}; |
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/** |
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* struct nfp_abm - ABM NIC app structure |
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* @app: back pointer to nfp_app |
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* @pf_id: ID of our PF link |
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* |
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* @red_support: is RED offload supported |
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* @num_prios: number of supported DSCP priorities |
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* @num_bands: number of supported DSCP priority bands |
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* @action_mask: bitmask of supported actions |
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* |
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* @thresholds: current threshold configuration |
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* @threshold_undef: bitmap of thresholds which have not been set |
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* @actions: current FW action configuration |
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* @num_thresholds: number of @thresholds and bits in @threshold_undef |
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* |
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* @prio_map_len: computed length of FW priority map (in bytes) |
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* @dscp_mask: mask FW will apply on DSCP field |
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* |
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* @eswitch_mode: devlink eswitch mode, advanced functions only visible |
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* in switchdev mode |
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* |
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* @q_lvls: queue level control area |
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* @qm_stats: queue statistics symbol |
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* @q_stats: basic queue statistics (only in per-band case) |
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*/ |
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struct nfp_abm { |
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struct nfp_app *app; |
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unsigned int pf_id; |
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unsigned int red_support; |
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unsigned int num_prios; |
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unsigned int num_bands; |
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unsigned int action_mask; |
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u32 *thresholds; |
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unsigned long *threshold_undef; |
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u8 *actions; |
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size_t num_thresholds; |
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unsigned int prio_map_len; |
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u8 dscp_mask; |
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enum devlink_eswitch_mode eswitch_mode; |
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const struct nfp_rtsym *q_lvls; |
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const struct nfp_rtsym *qm_stats; |
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const struct nfp_rtsym *q_stats; |
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}; |
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/** |
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* struct nfp_alink_stats - ABM NIC statistics |
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* @tx_pkts: number of TXed packets |
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* @tx_bytes: number of TXed bytes |
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* @backlog_pkts: momentary backlog length (packets) |
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* @backlog_bytes: momentary backlog length (bytes) |
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* @overlimits: number of ECN marked TXed packets (accumulative) |
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* @drops: number of tail-dropped packets (accumulative) |
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*/ |
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struct nfp_alink_stats { |
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u64 tx_pkts; |
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u64 tx_bytes; |
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u64 backlog_pkts; |
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u64 backlog_bytes; |
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u64 overlimits; |
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u64 drops; |
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}; |
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/** |
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* struct nfp_alink_xstats - extended ABM NIC statistics |
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* @ecn_marked: number of ECN marked TXed packets |
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* @pdrop: number of hard drops due to queue limit |
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*/ |
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struct nfp_alink_xstats { |
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u64 ecn_marked; |
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u64 pdrop; |
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}; |
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enum nfp_qdisc_type { |
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NFP_QDISC_NONE = 0, |
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NFP_QDISC_MQ, |
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NFP_QDISC_RED, |
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NFP_QDISC_GRED, |
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}; |
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#define NFP_QDISC_UNTRACKED ((struct nfp_qdisc *)1UL) |
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/** |
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* struct nfp_qdisc - tracked TC Qdisc |
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* @netdev: netdev on which Qdisc was created |
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* @type: Qdisc type |
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* @handle: handle of this Qdisc |
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* @parent_handle: handle of the parent (unreliable if Qdisc was grafted) |
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* @use_cnt: number of attachment points in the hierarchy |
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* @num_children: current size of the @children array |
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* @children: pointers to children |
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* |
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* @params_ok: parameters of this Qdisc are OK for offload |
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* @offload_mark: offload refresh state - selected for offload |
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* @offloaded: Qdisc is currently offloaded to the HW |
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* |
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* @mq: MQ Qdisc specific parameters and state |
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* @mq.stats: current stats of the MQ Qdisc |
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* @mq.prev_stats: previously reported @mq.stats |
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* |
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* @red: RED Qdisc specific parameters and state |
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* @red.num_bands: Number of valid entries in the @red.band table |
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* @red.band: Per-band array of RED instances |
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* @red.band.ecn: ECN marking is enabled (rather than drop) |
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* @red.band.threshold: ECN marking threshold |
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* @red.band.stats: current stats of the RED Qdisc |
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* @red.band.prev_stats: previously reported @red.stats |
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* @red.band.xstats: extended stats for RED - current |
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* @red.band.prev_xstats: extended stats for RED - previously reported |
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*/ |
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struct nfp_qdisc { |
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struct net_device *netdev; |
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enum nfp_qdisc_type type; |
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u32 handle; |
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u32 parent_handle; |
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unsigned int use_cnt; |
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unsigned int num_children; |
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struct nfp_qdisc **children; |
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bool params_ok; |
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bool offload_mark; |
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bool offloaded; |
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union { |
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/* NFP_QDISC_MQ */ |
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struct { |
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struct nfp_alink_stats stats; |
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struct nfp_alink_stats prev_stats; |
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} mq; |
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/* TC_SETUP_QDISC_RED, TC_SETUP_QDISC_GRED */ |
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struct { |
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unsigned int num_bands; |
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struct { |
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bool ecn; |
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u32 threshold; |
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struct nfp_alink_stats stats; |
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struct nfp_alink_stats prev_stats; |
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struct nfp_alink_xstats xstats; |
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struct nfp_alink_xstats prev_xstats; |
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} band[MAX_DPs]; |
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} red; |
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}; |
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}; |
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/** |
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* struct nfp_abm_link - port tuple of a ABM NIC |
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* @abm: back pointer to nfp_abm |
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* @vnic: data vNIC |
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* @id: id of the data vNIC |
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* @queue_base: id of base to host queue within PCIe (not QC idx) |
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* @total_queues: number of PF queues |
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* |
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* @last_stats_update: ktime of last stats update |
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* |
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* @prio_map: current map of priorities |
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* @has_prio: @prio_map is valid |
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* |
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* @def_band: default band to use |
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* @dscp_map: list of DSCP to band mappings |
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* |
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* @root_qdisc: pointer to the current root of the Qdisc hierarchy |
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* @qdiscs: all qdiscs recorded by major part of the handle |
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*/ |
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struct nfp_abm_link { |
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struct nfp_abm *abm; |
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struct nfp_net *vnic; |
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unsigned int id; |
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unsigned int queue_base; |
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unsigned int total_queues; |
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u64 last_stats_update; |
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u32 *prio_map; |
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bool has_prio; |
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u8 def_band; |
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struct list_head dscp_map; |
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struct nfp_qdisc *root_qdisc; |
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struct radix_tree_root qdiscs; |
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}; |
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static inline bool nfp_abm_has_prio(struct nfp_abm *abm) |
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{ |
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return abm->num_bands > 1; |
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} |
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static inline bool nfp_abm_has_drop(struct nfp_abm *abm) |
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{ |
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return abm->action_mask & BIT(NFP_ABM_ACT_DROP); |
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} |
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static inline bool nfp_abm_has_mark(struct nfp_abm *abm) |
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{ |
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return abm->action_mask & BIT(NFP_ABM_ACT_MARK_DROP); |
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} |
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void nfp_abm_qdisc_offload_update(struct nfp_abm_link *alink); |
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int nfp_abm_setup_root(struct net_device *netdev, struct nfp_abm_link *alink, |
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struct tc_root_qopt_offload *opt); |
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int nfp_abm_setup_tc_red(struct net_device *netdev, struct nfp_abm_link *alink, |
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struct tc_red_qopt_offload *opt); |
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int nfp_abm_setup_tc_mq(struct net_device *netdev, struct nfp_abm_link *alink, |
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struct tc_mq_qopt_offload *opt); |
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int nfp_abm_setup_tc_gred(struct net_device *netdev, struct nfp_abm_link *alink, |
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struct tc_gred_qopt_offload *opt); |
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int nfp_abm_setup_cls_block(struct net_device *netdev, struct nfp_repr *repr, |
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struct flow_block_offload *opt); |
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int nfp_abm_ctrl_read_params(struct nfp_abm_link *alink); |
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int nfp_abm_ctrl_find_addrs(struct nfp_abm *abm); |
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int __nfp_abm_ctrl_set_q_lvl(struct nfp_abm *abm, unsigned int id, u32 val); |
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int nfp_abm_ctrl_set_q_lvl(struct nfp_abm_link *alink, unsigned int band, |
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unsigned int queue, u32 val); |
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int __nfp_abm_ctrl_set_q_act(struct nfp_abm *abm, unsigned int id, |
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enum nfp_abm_q_action act); |
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int nfp_abm_ctrl_set_q_act(struct nfp_abm_link *alink, unsigned int band, |
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unsigned int queue, enum nfp_abm_q_action act); |
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int nfp_abm_ctrl_read_q_stats(struct nfp_abm_link *alink, |
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unsigned int band, unsigned int queue, |
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struct nfp_alink_stats *stats); |
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int nfp_abm_ctrl_read_q_xstats(struct nfp_abm_link *alink, |
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unsigned int band, unsigned int queue, |
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struct nfp_alink_xstats *xstats); |
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u64 nfp_abm_ctrl_stat_non_sto(struct nfp_abm_link *alink, unsigned int i); |
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u64 nfp_abm_ctrl_stat_sto(struct nfp_abm_link *alink, unsigned int i); |
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int nfp_abm_ctrl_qm_enable(struct nfp_abm *abm); |
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int nfp_abm_ctrl_qm_disable(struct nfp_abm *abm); |
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void nfp_abm_prio_map_update(struct nfp_abm *abm); |
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int nfp_abm_ctrl_prio_map_update(struct nfp_abm_link *alink, u32 *packed); |
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#endif
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