1 // SPDX-License-Identifier: GPL-2.0+ 2 3 #include "lan966x_main.h" 4 5 /* 0-8 : 9 port policers */ 6 #define POL_IDX_PORT 0 7 8 /* Policer order: Serial (QoS -> Port -> VCAP) */ 9 #define POL_ORDER 0x1d3 10 11 struct lan966x_tc_policer { 12 /* kilobit per second */ 13 u32 rate; 14 /* bytes */ 15 u32 burst; 16 }; 17 18 static int lan966x_police_add(struct lan966x_port *port, 19 struct lan966x_tc_policer *pol, 20 u16 pol_idx) 21 { 22 struct lan966x *lan966x = port->lan966x; 23 24 /* Rate unit is 33 1/3 kpps */ 25 pol->rate = DIV_ROUND_UP(pol->rate * 3, 100); 26 /* Avoid zero burst size */ 27 pol->burst = pol->burst ?: 1; 28 /* Unit is 4kB */ 29 pol->burst = DIV_ROUND_UP(pol->burst, 4096); 30 31 if (pol->rate > GENMASK(15, 0) || 32 pol->burst > GENMASK(6, 0)) 33 return -EINVAL; 34 35 lan_wr(ANA_POL_MODE_DROP_ON_YELLOW_ENA_SET(0) | 36 ANA_POL_MODE_MARK_ALL_FRMS_RED_ENA_SET(0) | 37 ANA_POL_MODE_IPG_SIZE_SET(20) | 38 ANA_POL_MODE_FRM_MODE_SET(1) | 39 ANA_POL_MODE_OVERSHOOT_ENA_SET(1), 40 lan966x, ANA_POL_MODE(pol_idx)); 41 42 lan_wr(ANA_POL_PIR_STATE_PIR_LVL_SET(0), 43 lan966x, ANA_POL_PIR_STATE(pol_idx)); 44 45 lan_wr(ANA_POL_PIR_CFG_PIR_RATE_SET(pol->rate) | 46 ANA_POL_PIR_CFG_PIR_BURST_SET(pol->burst), 47 lan966x, ANA_POL_PIR_CFG(pol_idx)); 48 49 return 0; 50 } 51 52 static void lan966x_police_del(struct lan966x_port *port, u16 pol_idx) 53 { 54 struct lan966x *lan966x = port->lan966x; 55 56 lan_wr(ANA_POL_MODE_DROP_ON_YELLOW_ENA_SET(0) | 57 ANA_POL_MODE_MARK_ALL_FRMS_RED_ENA_SET(0) | 58 ANA_POL_MODE_IPG_SIZE_SET(20) | 59 ANA_POL_MODE_FRM_MODE_SET(2) | 60 ANA_POL_MODE_OVERSHOOT_ENA_SET(1), 61 lan966x, ANA_POL_MODE(pol_idx)); 62 63 lan_wr(ANA_POL_PIR_STATE_PIR_LVL_SET(0), 64 lan966x, ANA_POL_PIR_STATE(pol_idx)); 65 66 lan_wr(ANA_POL_PIR_CFG_PIR_RATE_SET(GENMASK(14, 0)) | 67 ANA_POL_PIR_CFG_PIR_BURST_SET(0), 68 lan966x, ANA_POL_PIR_CFG(pol_idx)); 69 } 70 71 static int lan966x_police_validate(struct lan966x_port *port, 72 const struct flow_action *action, 73 const struct flow_action_entry *act, 74 unsigned long police_id, 75 bool ingress, 76 struct netlink_ext_ack *extack) 77 { 78 if (act->police.exceed.act_id != FLOW_ACTION_DROP) { 79 NL_SET_ERR_MSG_MOD(extack, 80 "Offload not supported when exceed action is not drop"); 81 return -EOPNOTSUPP; 82 } 83 84 if (act->police.notexceed.act_id != FLOW_ACTION_PIPE && 85 act->police.notexceed.act_id != FLOW_ACTION_ACCEPT) { 86 NL_SET_ERR_MSG_MOD(extack, 87 "Offload not supported when conform action is not pipe or ok"); 88 return -EOPNOTSUPP; 89 } 90 91 if (act->police.notexceed.act_id == FLOW_ACTION_ACCEPT && 92 !flow_action_is_last_entry(action, act)) { 93 NL_SET_ERR_MSG_MOD(extack, 94 "Offload not supported when conform action is ok, but action is not last"); 95 return -EOPNOTSUPP; 96 } 97 98 if (act->police.peakrate_bytes_ps || 99 act->police.avrate || act->police.overhead) { 100 NL_SET_ERR_MSG_MOD(extack, 101 "Offload not supported when peakrate/avrate/overhead is configured"); 102 return -EOPNOTSUPP; 103 } 104 105 if (act->police.rate_pkt_ps) { 106 NL_SET_ERR_MSG_MOD(extack, 107 "QoS offload not support packets per second"); 108 return -EOPNOTSUPP; 109 } 110 111 if (!ingress) { 112 NL_SET_ERR_MSG_MOD(extack, 113 "Policer is not supported on egress"); 114 return -EOPNOTSUPP; 115 } 116 117 if (port->tc.ingress_shared_block) { 118 NL_SET_ERR_MSG_MOD(extack, 119 "Policer is not supported on shared ingress blocks"); 120 return -EOPNOTSUPP; 121 } 122 123 if (port->tc.police_id && port->tc.police_id != police_id) { 124 NL_SET_ERR_MSG_MOD(extack, 125 "Only one policer per port is supported"); 126 return -EEXIST; 127 } 128 129 return 0; 130 } 131 132 int lan966x_police_port_add(struct lan966x_port *port, 133 struct flow_action *action, 134 struct flow_action_entry *act, 135 unsigned long police_id, 136 bool ingress, 137 struct netlink_ext_ack *extack) 138 { 139 struct lan966x *lan966x = port->lan966x; 140 struct rtnl_link_stats64 new_stats; 141 struct lan966x_tc_policer pol; 142 struct flow_stats *old_stats; 143 int err; 144 145 err = lan966x_police_validate(port, action, act, police_id, ingress, 146 extack); 147 if (err) 148 return err; 149 150 memset(&pol, 0, sizeof(pol)); 151 152 pol.rate = div_u64(act->police.rate_bytes_ps, 1000) * 8; 153 pol.burst = act->police.burst; 154 155 err = lan966x_police_add(port, &pol, POL_IDX_PORT + port->chip_port); 156 if (err) { 157 NL_SET_ERR_MSG_MOD(extack, 158 "Failed to add policer to port"); 159 return err; 160 } 161 162 lan_rmw(ANA_POL_CFG_PORT_POL_ENA_SET(1) | 163 ANA_POL_CFG_POL_ORDER_SET(POL_ORDER), 164 ANA_POL_CFG_PORT_POL_ENA | 165 ANA_POL_CFG_POL_ORDER, 166 lan966x, ANA_POL_CFG(port->chip_port)); 167 168 port->tc.police_id = police_id; 169 170 /* Setup initial stats */ 171 old_stats = &port->tc.police_stat; 172 lan966x_stats_get(port->dev, &new_stats); 173 old_stats->bytes = new_stats.rx_bytes; 174 old_stats->pkts = new_stats.rx_packets; 175 old_stats->drops = new_stats.rx_dropped; 176 old_stats->lastused = jiffies; 177 178 return 0; 179 } 180 181 int lan966x_police_port_del(struct lan966x_port *port, 182 unsigned long police_id, 183 struct netlink_ext_ack *extack) 184 { 185 struct lan966x *lan966x = port->lan966x; 186 187 if (port->tc.police_id != police_id) { 188 NL_SET_ERR_MSG_MOD(extack, 189 "Invalid policer id"); 190 return -EINVAL; 191 } 192 193 lan966x_police_del(port, POL_IDX_PORT + port->chip_port); 194 195 lan_rmw(ANA_POL_CFG_PORT_POL_ENA_SET(0) | 196 ANA_POL_CFG_POL_ORDER_SET(POL_ORDER), 197 ANA_POL_CFG_PORT_POL_ENA | 198 ANA_POL_CFG_POL_ORDER, 199 lan966x, ANA_POL_CFG(port->chip_port)); 200 201 port->tc.police_id = 0; 202 203 return 0; 204 } 205 206 void lan966x_police_port_stats(struct lan966x_port *port, 207 struct flow_stats *stats) 208 { 209 struct rtnl_link_stats64 new_stats; 210 struct flow_stats *old_stats; 211 212 old_stats = &port->tc.police_stat; 213 lan966x_stats_get(port->dev, &new_stats); 214 215 flow_stats_update(stats, 216 new_stats.rx_bytes - old_stats->bytes, 217 new_stats.rx_packets - old_stats->pkts, 218 new_stats.rx_dropped - old_stats->drops, 219 old_stats->lastused, 220 FLOW_ACTION_HW_STATS_IMMEDIATE); 221 222 old_stats->bytes = new_stats.rx_bytes; 223 old_stats->pkts = new_stats.rx_packets; 224 old_stats->drops = new_stats.rx_dropped; 225 old_stats->lastused = jiffies; 226 } 227