1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright 2020 NXP 3 */ 4 #include "sja1105.h" 5 #include "sja1105_vl.h" 6 7 struct sja1105_rule *sja1105_rule_find(struct sja1105_private *priv, 8 unsigned long cookie) 9 { 10 struct sja1105_rule *rule; 11 12 list_for_each_entry(rule, &priv->flow_block.rules, list) 13 if (rule->cookie == cookie) 14 return rule; 15 16 return NULL; 17 } 18 19 static int sja1105_find_free_l2_policer(struct sja1105_private *priv) 20 { 21 int i; 22 23 for (i = 0; i < SJA1105_NUM_L2_POLICERS; i++) 24 if (!priv->flow_block.l2_policer_used[i]) 25 return i; 26 27 return -1; 28 } 29 30 static int sja1105_setup_bcast_policer(struct sja1105_private *priv, 31 struct netlink_ext_ack *extack, 32 unsigned long cookie, int port, 33 u64 rate_bytes_per_sec, 34 u32 burst) 35 { 36 struct sja1105_rule *rule = sja1105_rule_find(priv, cookie); 37 struct sja1105_l2_policing_entry *policing; 38 struct dsa_switch *ds = priv->ds; 39 bool new_rule = false; 40 unsigned long p; 41 int rc; 42 43 if (!rule) { 44 rule = kzalloc(sizeof(*rule), GFP_KERNEL); 45 if (!rule) 46 return -ENOMEM; 47 48 rule->cookie = cookie; 49 rule->type = SJA1105_RULE_BCAST_POLICER; 50 rule->bcast_pol.sharindx = sja1105_find_free_l2_policer(priv); 51 rule->key.type = SJA1105_KEY_BCAST; 52 new_rule = true; 53 } 54 55 if (rule->bcast_pol.sharindx == -1) { 56 NL_SET_ERR_MSG_MOD(extack, "No more L2 policers free"); 57 rc = -ENOSPC; 58 goto out; 59 } 60 61 policing = priv->static_config.tables[BLK_IDX_L2_POLICING].entries; 62 63 if (policing[(ds->num_ports * SJA1105_NUM_TC) + port].sharindx != port) { 64 NL_SET_ERR_MSG_MOD(extack, 65 "Port already has a broadcast policer"); 66 rc = -EEXIST; 67 goto out; 68 } 69 70 rule->port_mask |= BIT(port); 71 72 /* Make the broadcast policers of all ports attached to this block 73 * point to the newly allocated policer 74 */ 75 for_each_set_bit(p, &rule->port_mask, SJA1105_MAX_NUM_PORTS) { 76 int bcast = (ds->num_ports * SJA1105_NUM_TC) + p; 77 78 policing[bcast].sharindx = rule->bcast_pol.sharindx; 79 } 80 81 policing[rule->bcast_pol.sharindx].rate = div_u64(rate_bytes_per_sec * 82 512, 1000000); 83 policing[rule->bcast_pol.sharindx].smax = burst; 84 85 /* TODO: support per-flow MTU */ 86 policing[rule->bcast_pol.sharindx].maxlen = VLAN_ETH_FRAME_LEN + 87 ETH_FCS_LEN; 88 89 rc = sja1105_static_config_reload(priv, SJA1105_BEST_EFFORT_POLICING); 90 91 out: 92 if (rc == 0 && new_rule) { 93 priv->flow_block.l2_policer_used[rule->bcast_pol.sharindx] = true; 94 list_add(&rule->list, &priv->flow_block.rules); 95 } else if (new_rule) { 96 kfree(rule); 97 } 98 99 return rc; 100 } 101 102 static int sja1105_setup_tc_policer(struct sja1105_private *priv, 103 struct netlink_ext_ack *extack, 104 unsigned long cookie, int port, int tc, 105 u64 rate_bytes_per_sec, 106 u32 burst) 107 { 108 struct sja1105_rule *rule = sja1105_rule_find(priv, cookie); 109 struct sja1105_l2_policing_entry *policing; 110 bool new_rule = false; 111 unsigned long p; 112 int rc; 113 114 if (!rule) { 115 rule = kzalloc(sizeof(*rule), GFP_KERNEL); 116 if (!rule) 117 return -ENOMEM; 118 119 rule->cookie = cookie; 120 rule->type = SJA1105_RULE_TC_POLICER; 121 rule->tc_pol.sharindx = sja1105_find_free_l2_policer(priv); 122 rule->key.type = SJA1105_KEY_TC; 123 rule->key.tc.pcp = tc; 124 new_rule = true; 125 } 126 127 if (rule->tc_pol.sharindx == -1) { 128 NL_SET_ERR_MSG_MOD(extack, "No more L2 policers free"); 129 rc = -ENOSPC; 130 goto out; 131 } 132 133 policing = priv->static_config.tables[BLK_IDX_L2_POLICING].entries; 134 135 if (policing[(port * SJA1105_NUM_TC) + tc].sharindx != port) { 136 NL_SET_ERR_MSG_MOD(extack, 137 "Port-TC pair already has an L2 policer"); 138 rc = -EEXIST; 139 goto out; 140 } 141 142 rule->port_mask |= BIT(port); 143 144 /* Make the policers for traffic class @tc of all ports attached to 145 * this block point to the newly allocated policer 146 */ 147 for_each_set_bit(p, &rule->port_mask, SJA1105_MAX_NUM_PORTS) { 148 int index = (p * SJA1105_NUM_TC) + tc; 149 150 policing[index].sharindx = rule->tc_pol.sharindx; 151 } 152 153 policing[rule->tc_pol.sharindx].rate = div_u64(rate_bytes_per_sec * 154 512, 1000000); 155 policing[rule->tc_pol.sharindx].smax = burst; 156 157 /* TODO: support per-flow MTU */ 158 policing[rule->tc_pol.sharindx].maxlen = VLAN_ETH_FRAME_LEN + 159 ETH_FCS_LEN; 160 161 rc = sja1105_static_config_reload(priv, SJA1105_BEST_EFFORT_POLICING); 162 163 out: 164 if (rc == 0 && new_rule) { 165 priv->flow_block.l2_policer_used[rule->tc_pol.sharindx] = true; 166 list_add(&rule->list, &priv->flow_block.rules); 167 } else if (new_rule) { 168 kfree(rule); 169 } 170 171 return rc; 172 } 173 174 static int sja1105_flower_policer(struct sja1105_private *priv, int port, 175 struct netlink_ext_ack *extack, 176 unsigned long cookie, 177 struct sja1105_key *key, 178 u64 rate_bytes_per_sec, 179 u32 burst) 180 { 181 switch (key->type) { 182 case SJA1105_KEY_BCAST: 183 return sja1105_setup_bcast_policer(priv, extack, cookie, port, 184 rate_bytes_per_sec, burst); 185 case SJA1105_KEY_TC: 186 return sja1105_setup_tc_policer(priv, extack, cookie, port, 187 key->tc.pcp, rate_bytes_per_sec, 188 burst); 189 default: 190 NL_SET_ERR_MSG_MOD(extack, "Unknown keys for policing"); 191 return -EOPNOTSUPP; 192 } 193 } 194 195 static int sja1105_flower_parse_key(struct sja1105_private *priv, 196 struct netlink_ext_ack *extack, 197 struct flow_cls_offload *cls, 198 struct sja1105_key *key) 199 { 200 struct flow_rule *rule = flow_cls_offload_flow_rule(cls); 201 struct flow_dissector *dissector = rule->match.dissector; 202 bool is_bcast_dmac = false; 203 u64 dmac = U64_MAX; 204 u16 vid = U16_MAX; 205 u16 pcp = U16_MAX; 206 207 if (dissector->used_keys & 208 ~(BIT(FLOW_DISSECTOR_KEY_BASIC) | 209 BIT(FLOW_DISSECTOR_KEY_CONTROL) | 210 BIT(FLOW_DISSECTOR_KEY_VLAN) | 211 BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS))) { 212 NL_SET_ERR_MSG_MOD(extack, 213 "Unsupported keys used"); 214 return -EOPNOTSUPP; 215 } 216 217 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) { 218 struct flow_match_basic match; 219 220 flow_rule_match_basic(rule, &match); 221 if (match.key->n_proto) { 222 NL_SET_ERR_MSG_MOD(extack, 223 "Matching on protocol not supported"); 224 return -EOPNOTSUPP; 225 } 226 } 227 228 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) { 229 u8 bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; 230 u8 null[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; 231 struct flow_match_eth_addrs match; 232 233 flow_rule_match_eth_addrs(rule, &match); 234 235 if (!ether_addr_equal_masked(match.key->src, null, 236 match.mask->src)) { 237 NL_SET_ERR_MSG_MOD(extack, 238 "Matching on source MAC not supported"); 239 return -EOPNOTSUPP; 240 } 241 242 if (!ether_addr_equal(match.mask->dst, bcast)) { 243 NL_SET_ERR_MSG_MOD(extack, 244 "Masked matching on MAC not supported"); 245 return -EOPNOTSUPP; 246 } 247 248 dmac = ether_addr_to_u64(match.key->dst); 249 is_bcast_dmac = ether_addr_equal(match.key->dst, bcast); 250 } 251 252 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) { 253 struct flow_match_vlan match; 254 255 flow_rule_match_vlan(rule, &match); 256 257 if (match.mask->vlan_id && 258 match.mask->vlan_id != VLAN_VID_MASK) { 259 NL_SET_ERR_MSG_MOD(extack, 260 "Masked matching on VID is not supported"); 261 return -EOPNOTSUPP; 262 } 263 264 if (match.mask->vlan_priority && 265 match.mask->vlan_priority != 0x7) { 266 NL_SET_ERR_MSG_MOD(extack, 267 "Masked matching on PCP is not supported"); 268 return -EOPNOTSUPP; 269 } 270 271 if (match.mask->vlan_id) 272 vid = match.key->vlan_id; 273 if (match.mask->vlan_priority) 274 pcp = match.key->vlan_priority; 275 } 276 277 if (is_bcast_dmac && vid == U16_MAX && pcp == U16_MAX) { 278 key->type = SJA1105_KEY_BCAST; 279 return 0; 280 } 281 if (dmac == U64_MAX && vid == U16_MAX && pcp != U16_MAX) { 282 key->type = SJA1105_KEY_TC; 283 key->tc.pcp = pcp; 284 return 0; 285 } 286 if (dmac != U64_MAX && vid != U16_MAX && pcp != U16_MAX) { 287 key->type = SJA1105_KEY_VLAN_AWARE_VL; 288 key->vl.dmac = dmac; 289 key->vl.vid = vid; 290 key->vl.pcp = pcp; 291 return 0; 292 } 293 if (dmac != U64_MAX) { 294 key->type = SJA1105_KEY_VLAN_UNAWARE_VL; 295 key->vl.dmac = dmac; 296 return 0; 297 } 298 299 NL_SET_ERR_MSG_MOD(extack, "Not matching on any known key"); 300 return -EOPNOTSUPP; 301 } 302 303 static int sja1105_policer_validate(const struct flow_action *action, 304 const struct flow_action_entry *act, 305 struct netlink_ext_ack *extack) 306 { 307 if (act->police.exceed.act_id != FLOW_ACTION_DROP) { 308 NL_SET_ERR_MSG_MOD(extack, 309 "Offload not supported when exceed action is not drop"); 310 return -EOPNOTSUPP; 311 } 312 313 if (act->police.notexceed.act_id != FLOW_ACTION_PIPE && 314 act->police.notexceed.act_id != FLOW_ACTION_ACCEPT) { 315 NL_SET_ERR_MSG_MOD(extack, 316 "Offload not supported when conform action is not pipe or ok"); 317 return -EOPNOTSUPP; 318 } 319 320 if (act->police.notexceed.act_id == FLOW_ACTION_ACCEPT && 321 !flow_action_is_last_entry(action, act)) { 322 NL_SET_ERR_MSG_MOD(extack, 323 "Offload not supported when conform action is ok, but action is not last"); 324 return -EOPNOTSUPP; 325 } 326 327 if (act->police.peakrate_bytes_ps || 328 act->police.avrate || act->police.overhead) { 329 NL_SET_ERR_MSG_MOD(extack, 330 "Offload not supported when peakrate/avrate/overhead is configured"); 331 return -EOPNOTSUPP; 332 } 333 334 if (act->police.rate_pkt_ps) { 335 NL_SET_ERR_MSG_MOD(extack, 336 "QoS offload not support packets per second"); 337 return -EOPNOTSUPP; 338 } 339 340 return 0; 341 } 342 343 int sja1105_cls_flower_add(struct dsa_switch *ds, int port, 344 struct flow_cls_offload *cls, bool ingress) 345 { 346 struct flow_rule *rule = flow_cls_offload_flow_rule(cls); 347 struct netlink_ext_ack *extack = cls->common.extack; 348 struct sja1105_private *priv = ds->priv; 349 const struct flow_action_entry *act; 350 unsigned long cookie = cls->cookie; 351 bool routing_rule = false; 352 struct sja1105_key key; 353 bool gate_rule = false; 354 bool vl_rule = false; 355 int rc, i; 356 357 rc = sja1105_flower_parse_key(priv, extack, cls, &key); 358 if (rc) 359 return rc; 360 361 flow_action_for_each(i, act, &rule->action) { 362 switch (act->id) { 363 case FLOW_ACTION_POLICE: 364 rc = sja1105_policer_validate(&rule->action, act, extack); 365 if (rc) 366 goto out; 367 368 rc = sja1105_flower_policer(priv, port, extack, cookie, 369 &key, 370 act->police.rate_bytes_ps, 371 act->police.burst); 372 if (rc) 373 goto out; 374 break; 375 case FLOW_ACTION_TRAP: { 376 int cpu = dsa_upstream_port(ds, port); 377 378 routing_rule = true; 379 vl_rule = true; 380 381 rc = sja1105_vl_redirect(priv, port, extack, cookie, 382 &key, BIT(cpu), true); 383 if (rc) 384 goto out; 385 break; 386 } 387 case FLOW_ACTION_REDIRECT: { 388 struct dsa_port *to_dp; 389 390 to_dp = dsa_port_from_netdev(act->dev); 391 if (IS_ERR(to_dp)) { 392 NL_SET_ERR_MSG_MOD(extack, 393 "Destination not a switch port"); 394 return -EOPNOTSUPP; 395 } 396 397 routing_rule = true; 398 vl_rule = true; 399 400 rc = sja1105_vl_redirect(priv, port, extack, cookie, 401 &key, BIT(to_dp->index), true); 402 if (rc) 403 goto out; 404 break; 405 } 406 case FLOW_ACTION_DROP: 407 vl_rule = true; 408 409 rc = sja1105_vl_redirect(priv, port, extack, cookie, 410 &key, 0, false); 411 if (rc) 412 goto out; 413 break; 414 case FLOW_ACTION_GATE: 415 gate_rule = true; 416 vl_rule = true; 417 418 rc = sja1105_vl_gate(priv, port, extack, cookie, 419 &key, act->hw_index, 420 act->gate.prio, 421 act->gate.basetime, 422 act->gate.cycletime, 423 act->gate.cycletimeext, 424 act->gate.num_entries, 425 act->gate.entries); 426 if (rc) 427 goto out; 428 break; 429 default: 430 NL_SET_ERR_MSG_MOD(extack, 431 "Action not supported"); 432 rc = -EOPNOTSUPP; 433 goto out; 434 } 435 } 436 437 if (vl_rule && !rc) { 438 /* Delay scheduling configuration until DESTPORTS has been 439 * populated by all other actions. 440 */ 441 if (gate_rule) { 442 if (!routing_rule) { 443 NL_SET_ERR_MSG_MOD(extack, 444 "Can only offload gate action together with redirect or trap"); 445 return -EOPNOTSUPP; 446 } 447 rc = sja1105_init_scheduling(priv); 448 if (rc) 449 goto out; 450 } 451 452 rc = sja1105_static_config_reload(priv, SJA1105_VIRTUAL_LINKS); 453 } 454 455 out: 456 return rc; 457 } 458 459 int sja1105_cls_flower_del(struct dsa_switch *ds, int port, 460 struct flow_cls_offload *cls, bool ingress) 461 { 462 struct sja1105_private *priv = ds->priv; 463 struct sja1105_rule *rule = sja1105_rule_find(priv, cls->cookie); 464 struct sja1105_l2_policing_entry *policing; 465 int old_sharindx; 466 467 if (!rule) 468 return 0; 469 470 if (rule->type == SJA1105_RULE_VL) 471 return sja1105_vl_delete(priv, port, rule, cls->common.extack); 472 473 policing = priv->static_config.tables[BLK_IDX_L2_POLICING].entries; 474 475 if (rule->type == SJA1105_RULE_BCAST_POLICER) { 476 int bcast = (ds->num_ports * SJA1105_NUM_TC) + port; 477 478 old_sharindx = policing[bcast].sharindx; 479 policing[bcast].sharindx = port; 480 } else if (rule->type == SJA1105_RULE_TC_POLICER) { 481 int index = (port * SJA1105_NUM_TC) + rule->key.tc.pcp; 482 483 old_sharindx = policing[index].sharindx; 484 policing[index].sharindx = port; 485 } else { 486 return -EINVAL; 487 } 488 489 rule->port_mask &= ~BIT(port); 490 if (!rule->port_mask) { 491 priv->flow_block.l2_policer_used[old_sharindx] = false; 492 list_del(&rule->list); 493 kfree(rule); 494 } 495 496 return sja1105_static_config_reload(priv, SJA1105_BEST_EFFORT_POLICING); 497 } 498 499 int sja1105_cls_flower_stats(struct dsa_switch *ds, int port, 500 struct flow_cls_offload *cls, bool ingress) 501 { 502 struct sja1105_private *priv = ds->priv; 503 struct sja1105_rule *rule = sja1105_rule_find(priv, cls->cookie); 504 int rc; 505 506 if (!rule) 507 return 0; 508 509 if (rule->type != SJA1105_RULE_VL) 510 return 0; 511 512 rc = sja1105_vl_stats(priv, port, rule, &cls->stats, 513 cls->common.extack); 514 if (rc) 515 return rc; 516 517 return 0; 518 } 519 520 void sja1105_flower_setup(struct dsa_switch *ds) 521 { 522 struct sja1105_private *priv = ds->priv; 523 int port; 524 525 INIT_LIST_HEAD(&priv->flow_block.rules); 526 527 for (port = 0; port < ds->num_ports; port++) 528 priv->flow_block.l2_policer_used[port] = true; 529 } 530 531 void sja1105_flower_teardown(struct dsa_switch *ds) 532 { 533 struct sja1105_private *priv = ds->priv; 534 struct sja1105_rule *rule; 535 struct list_head *pos, *n; 536 537 list_for_each_safe(pos, n, &priv->flow_block.rules) { 538 rule = list_entry(pos, struct sja1105_rule, list); 539 list_del(&rule->list); 540 kfree(rule); 541 } 542 } 543