1 /* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */ 2 /* Copyright (C) 2018 Netronome Systems, Inc. */ 3 4 #ifndef __NFP_ABM_H__ 5 #define __NFP_ABM_H__ 1 6 7 #include <linux/bits.h> 8 #include <linux/radix-tree.h> 9 #include <net/devlink.h> 10 #include <net/pkt_cls.h> 11 12 /* Dump of 64 PRIOs and 256 REDs seems to take 850us on Xeon v4 @ 2.20GHz; 13 * 2.5ms / 400Hz seems more than sufficient for stats resolution. 14 */ 15 #define NFP_ABM_STATS_REFRESH_IVAL (2500 * 1000) /* ns */ 16 17 #define NFP_ABM_LVL_INFINITY S32_MAX 18 19 struct nfp_app; 20 struct nfp_net; 21 22 #define NFP_ABM_PORTID_TYPE GENMASK(23, 16) 23 #define NFP_ABM_PORTID_ID GENMASK(7, 0) 24 25 /** 26 * struct nfp_abm - ABM NIC app structure 27 * @app: back pointer to nfp_app 28 * @pf_id: ID of our PF link 29 * 30 * @num_prios: number of supported DSCP priorities 31 * @num_bands: number of supported DSCP priority bands 32 * 33 * @thresholds: current threshold configuration 34 * @threshold_undef: bitmap of thresholds which have not been set 35 * @num_thresholds: number of @thresholds and bits in @threshold_undef 36 * 37 * @eswitch_mode: devlink eswitch mode, advanced functions only visible 38 * in switchdev mode 39 * @q_lvls: queue level control area 40 * @qm_stats: queue statistics symbol 41 * @q_stats: basic queue statistics (only in per-band case) 42 */ 43 struct nfp_abm { 44 struct nfp_app *app; 45 unsigned int pf_id; 46 47 unsigned int num_prios; 48 unsigned int num_bands; 49 50 u32 *thresholds; 51 unsigned long *threshold_undef; 52 size_t num_thresholds; 53 54 enum devlink_eswitch_mode eswitch_mode; 55 const struct nfp_rtsym *q_lvls; 56 const struct nfp_rtsym *qm_stats; 57 const struct nfp_rtsym *q_stats; 58 }; 59 60 /** 61 * struct nfp_alink_stats - ABM NIC statistics 62 * @tx_pkts: number of TXed packets 63 * @tx_bytes: number of TXed bytes 64 * @backlog_pkts: momentary backlog length (packets) 65 * @backlog_bytes: momentary backlog length (bytes) 66 * @overlimits: number of ECN marked TXed packets (accumulative) 67 * @drops: number of tail-dropped packets (accumulative) 68 */ 69 struct nfp_alink_stats { 70 u64 tx_pkts; 71 u64 tx_bytes; 72 u64 backlog_pkts; 73 u64 backlog_bytes; 74 u64 overlimits; 75 u64 drops; 76 }; 77 78 /** 79 * struct nfp_alink_xstats - extended ABM NIC statistics 80 * @ecn_marked: number of ECN marked TXed packets 81 * @pdrop: number of hard drops due to queue limit 82 */ 83 struct nfp_alink_xstats { 84 u64 ecn_marked; 85 u64 pdrop; 86 }; 87 88 enum nfp_qdisc_type { 89 NFP_QDISC_NONE = 0, 90 NFP_QDISC_MQ, 91 NFP_QDISC_RED, 92 }; 93 94 #define NFP_QDISC_UNTRACKED ((struct nfp_qdisc *)1UL) 95 96 /** 97 * struct nfp_qdisc - tracked TC Qdisc 98 * @netdev: netdev on which Qdisc was created 99 * @type: Qdisc type 100 * @handle: handle of this Qdisc 101 * @parent_handle: handle of the parent (unreliable if Qdisc was grafted) 102 * @use_cnt: number of attachment points in the hierarchy 103 * @num_children: current size of the @children array 104 * @children: pointers to children 105 * 106 * @params_ok: parameters of this Qdisc are OK for offload 107 * @offload_mark: offload refresh state - selected for offload 108 * @offloaded: Qdisc is currently offloaded to the HW 109 * 110 * @mq: MQ Qdisc specific parameters and state 111 * @mq.stats: current stats of the MQ Qdisc 112 * @mq.prev_stats: previously reported @mq.stats 113 * 114 * @red: RED Qdisc specific parameters and state 115 * @red.threshold: ECN marking threshold 116 * @red.stats: current stats of the RED Qdisc 117 * @red.prev_stats: previously reported @red.stats 118 * @red.xstats: extended stats for RED - current 119 * @red.prev_xstats: extended stats for RED - previously reported 120 */ 121 struct nfp_qdisc { 122 struct net_device *netdev; 123 enum nfp_qdisc_type type; 124 u32 handle; 125 u32 parent_handle; 126 unsigned int use_cnt; 127 unsigned int num_children; 128 struct nfp_qdisc **children; 129 130 bool params_ok; 131 bool offload_mark; 132 bool offloaded; 133 134 union { 135 /* NFP_QDISC_MQ */ 136 struct { 137 struct nfp_alink_stats stats; 138 struct nfp_alink_stats prev_stats; 139 } mq; 140 /* TC_SETUP_QDISC_RED */ 141 struct { 142 u32 threshold; 143 struct nfp_alink_stats stats; 144 struct nfp_alink_stats prev_stats; 145 struct nfp_alink_xstats xstats; 146 struct nfp_alink_xstats prev_xstats; 147 } red; 148 }; 149 }; 150 151 /** 152 * struct nfp_abm_link - port tuple of a ABM NIC 153 * @abm: back pointer to nfp_abm 154 * @vnic: data vNIC 155 * @id: id of the data vNIC 156 * @queue_base: id of base to host queue within PCIe (not QC idx) 157 * @total_queues: number of PF queues 158 * 159 * @last_stats_update: ktime of last stats update 160 * 161 * @root_qdisc: pointer to the current root of the Qdisc hierarchy 162 * @qdiscs: all qdiscs recorded by major part of the handle 163 */ 164 struct nfp_abm_link { 165 struct nfp_abm *abm; 166 struct nfp_net *vnic; 167 unsigned int id; 168 unsigned int queue_base; 169 unsigned int total_queues; 170 171 u64 last_stats_update; 172 173 struct nfp_qdisc *root_qdisc; 174 struct radix_tree_root qdiscs; 175 }; 176 177 static inline bool nfp_abm_has_prio(struct nfp_abm *abm) 178 { 179 return abm->num_bands > 1; 180 } 181 182 void nfp_abm_qdisc_offload_update(struct nfp_abm_link *alink); 183 int nfp_abm_setup_root(struct net_device *netdev, struct nfp_abm_link *alink, 184 struct tc_root_qopt_offload *opt); 185 int nfp_abm_setup_tc_red(struct net_device *netdev, struct nfp_abm_link *alink, 186 struct tc_red_qopt_offload *opt); 187 int nfp_abm_setup_tc_mq(struct net_device *netdev, struct nfp_abm_link *alink, 188 struct tc_mq_qopt_offload *opt); 189 190 void nfp_abm_ctrl_read_params(struct nfp_abm_link *alink); 191 int nfp_abm_ctrl_find_addrs(struct nfp_abm *abm); 192 int __nfp_abm_ctrl_set_q_lvl(struct nfp_abm *abm, unsigned int id, u32 val); 193 int nfp_abm_ctrl_set_q_lvl(struct nfp_abm_link *alink, unsigned int band, 194 unsigned int queue, u32 val); 195 int nfp_abm_ctrl_read_q_stats(struct nfp_abm_link *alink, 196 unsigned int band, unsigned int queue, 197 struct nfp_alink_stats *stats); 198 int nfp_abm_ctrl_read_q_xstats(struct nfp_abm_link *alink, 199 unsigned int band, unsigned int queue, 200 struct nfp_alink_xstats *xstats); 201 u64 nfp_abm_ctrl_stat_non_sto(struct nfp_abm_link *alink, unsigned int i); 202 u64 nfp_abm_ctrl_stat_sto(struct nfp_abm_link *alink, unsigned int i); 203 int nfp_abm_ctrl_qm_enable(struct nfp_abm *abm); 204 int nfp_abm_ctrl_qm_disable(struct nfp_abm *abm); 205 #endif 206