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 */ 42 struct nfp_abm { 43 struct nfp_app *app; 44 unsigned int pf_id; 45 46 unsigned int num_prios; 47 unsigned int num_bands; 48 49 u32 *thresholds; 50 unsigned long *threshold_undef; 51 size_t num_thresholds; 52 53 enum devlink_eswitch_mode eswitch_mode; 54 const struct nfp_rtsym *q_lvls; 55 const struct nfp_rtsym *qm_stats; 56 }; 57 58 /** 59 * struct nfp_alink_stats - ABM NIC statistics 60 * @tx_pkts: number of TXed packets 61 * @tx_bytes: number of TXed bytes 62 * @backlog_pkts: momentary backlog length (packets) 63 * @backlog_bytes: momentary backlog length (bytes) 64 * @overlimits: number of ECN marked TXed packets (accumulative) 65 * @drops: number of tail-dropped packets (accumulative) 66 */ 67 struct nfp_alink_stats { 68 u64 tx_pkts; 69 u64 tx_bytes; 70 u64 backlog_pkts; 71 u64 backlog_bytes; 72 u64 overlimits; 73 u64 drops; 74 }; 75 76 /** 77 * struct nfp_alink_xstats - extended ABM NIC statistics 78 * @ecn_marked: number of ECN marked TXed packets 79 * @pdrop: number of hard drops due to queue limit 80 */ 81 struct nfp_alink_xstats { 82 u64 ecn_marked; 83 u64 pdrop; 84 }; 85 86 enum nfp_qdisc_type { 87 NFP_QDISC_NONE = 0, 88 NFP_QDISC_MQ, 89 NFP_QDISC_RED, 90 }; 91 92 #define NFP_QDISC_UNTRACKED ((struct nfp_qdisc *)1UL) 93 94 /** 95 * struct nfp_qdisc - tracked TC Qdisc 96 * @netdev: netdev on which Qdisc was created 97 * @type: Qdisc type 98 * @handle: handle of this Qdisc 99 * @parent_handle: handle of the parent (unreliable if Qdisc was grafted) 100 * @use_cnt: number of attachment points in the hierarchy 101 * @num_children: current size of the @children array 102 * @children: pointers to children 103 * 104 * @params_ok: parameters of this Qdisc are OK for offload 105 * @offload_mark: offload refresh state - selected for offload 106 * @offloaded: Qdisc is currently offloaded to the HW 107 * 108 * @mq: MQ Qdisc specific parameters and state 109 * @mq.stats: current stats of the MQ Qdisc 110 * @mq.prev_stats: previously reported @mq.stats 111 * 112 * @red: RED Qdisc specific parameters and state 113 * @red.threshold: ECN marking threshold 114 * @red.stats: current stats of the RED Qdisc 115 * @red.prev_stats: previously reported @red.stats 116 * @red.xstats: extended stats for RED - current 117 * @red.prev_xstats: extended stats for RED - previously reported 118 */ 119 struct nfp_qdisc { 120 struct net_device *netdev; 121 enum nfp_qdisc_type type; 122 u32 handle; 123 u32 parent_handle; 124 unsigned int use_cnt; 125 unsigned int num_children; 126 struct nfp_qdisc **children; 127 128 bool params_ok; 129 bool offload_mark; 130 bool offloaded; 131 132 union { 133 /* NFP_QDISC_MQ */ 134 struct { 135 struct nfp_alink_stats stats; 136 struct nfp_alink_stats prev_stats; 137 } mq; 138 /* TC_SETUP_QDISC_RED */ 139 struct { 140 u32 threshold; 141 struct nfp_alink_stats stats; 142 struct nfp_alink_stats prev_stats; 143 struct nfp_alink_xstats xstats; 144 struct nfp_alink_xstats prev_xstats; 145 } red; 146 }; 147 }; 148 149 /** 150 * struct nfp_abm_link - port tuple of a ABM NIC 151 * @abm: back pointer to nfp_abm 152 * @vnic: data vNIC 153 * @id: id of the data vNIC 154 * @queue_base: id of base to host queue within PCIe (not QC idx) 155 * @total_queues: number of PF queues 156 * 157 * @last_stats_update: ktime of last stats update 158 * 159 * @root_qdisc: pointer to the current root of the Qdisc hierarchy 160 * @qdiscs: all qdiscs recorded by major part of the handle 161 */ 162 struct nfp_abm_link { 163 struct nfp_abm *abm; 164 struct nfp_net *vnic; 165 unsigned int id; 166 unsigned int queue_base; 167 unsigned int total_queues; 168 169 u64 last_stats_update; 170 171 struct nfp_qdisc *root_qdisc; 172 struct radix_tree_root qdiscs; 173 }; 174 175 static inline bool nfp_abm_has_prio(struct nfp_abm *abm) 176 { 177 return abm->num_bands > 1; 178 } 179 180 void nfp_abm_qdisc_offload_update(struct nfp_abm_link *alink); 181 int nfp_abm_setup_root(struct net_device *netdev, struct nfp_abm_link *alink, 182 struct tc_root_qopt_offload *opt); 183 int nfp_abm_setup_tc_red(struct net_device *netdev, struct nfp_abm_link *alink, 184 struct tc_red_qopt_offload *opt); 185 int nfp_abm_setup_tc_mq(struct net_device *netdev, struct nfp_abm_link *alink, 186 struct tc_mq_qopt_offload *opt); 187 188 void nfp_abm_ctrl_read_params(struct nfp_abm_link *alink); 189 int nfp_abm_ctrl_find_addrs(struct nfp_abm *abm); 190 int __nfp_abm_ctrl_set_q_lvl(struct nfp_abm *abm, unsigned int id, u32 val); 191 int nfp_abm_ctrl_set_q_lvl(struct nfp_abm_link *alink, unsigned int queue, 192 u32 val); 193 int nfp_abm_ctrl_read_q_stats(struct nfp_abm_link *alink, unsigned int i, 194 struct nfp_alink_stats *stats); 195 int nfp_abm_ctrl_read_q_xstats(struct nfp_abm_link *alink, unsigned int i, 196 struct nfp_alink_xstats *xstats); 197 u64 nfp_abm_ctrl_stat_non_sto(struct nfp_abm_link *alink, unsigned int i); 198 u64 nfp_abm_ctrl_stat_sto(struct nfp_abm_link *alink, unsigned int i); 199 int nfp_abm_ctrl_qm_enable(struct nfp_abm *abm); 200 int nfp_abm_ctrl_qm_disable(struct nfp_abm *abm); 201 #endif 202