1 // SPDX-License-Identifier: GPL-2.0-only 2 /* Copyright (C) 2019 Chelsio Communications. All rights reserved. */ 3 4 #include "cxgb4.h" 5 #include "cxgb4_tc_matchall.h" 6 #include "sched.h" 7 #include "cxgb4_uld.h" 8 #include "cxgb4_filter.h" 9 #include "cxgb4_tc_flower.h" 10 11 static int cxgb4_matchall_egress_validate(struct net_device *dev, 12 struct tc_cls_matchall_offload *cls) 13 { 14 struct netlink_ext_ack *extack = cls->common.extack; 15 struct flow_action *actions = &cls->rule->action; 16 struct port_info *pi = netdev2pinfo(dev); 17 struct flow_action_entry *entry; 18 struct ch_sched_queue qe; 19 struct sched_class *e; 20 u64 max_link_rate; 21 u32 i, speed; 22 int ret; 23 24 if (!flow_action_has_entries(actions)) { 25 NL_SET_ERR_MSG_MOD(extack, 26 "Egress MATCHALL offload needs at least 1 policing action"); 27 return -EINVAL; 28 } else if (!flow_offload_has_one_action(actions)) { 29 NL_SET_ERR_MSG_MOD(extack, 30 "Egress MATCHALL offload only supports 1 policing action"); 31 return -EINVAL; 32 } else if (pi->tc_block_shared) { 33 NL_SET_ERR_MSG_MOD(extack, 34 "Egress MATCHALL offload not supported with shared blocks"); 35 return -EINVAL; 36 } 37 38 ret = t4_get_link_params(pi, NULL, &speed, NULL); 39 if (ret) { 40 NL_SET_ERR_MSG_MOD(extack, 41 "Failed to get max speed supported by the link"); 42 return -EINVAL; 43 } 44 45 /* Convert from Mbps to bps */ 46 max_link_rate = (u64)speed * 1000 * 1000; 47 48 flow_action_for_each(i, entry, actions) { 49 switch (entry->id) { 50 case FLOW_ACTION_POLICE: 51 /* Convert bytes per second to bits per second */ 52 if (entry->police.rate_bytes_ps * 8 > max_link_rate) { 53 NL_SET_ERR_MSG_MOD(extack, 54 "Specified policing max rate is larger than underlying link speed"); 55 return -ERANGE; 56 } 57 break; 58 default: 59 NL_SET_ERR_MSG_MOD(extack, 60 "Only policing action supported with Egress MATCHALL offload"); 61 return -EOPNOTSUPP; 62 } 63 } 64 65 for (i = 0; i < pi->nqsets; i++) { 66 memset(&qe, 0, sizeof(qe)); 67 qe.queue = i; 68 69 e = cxgb4_sched_queue_lookup(dev, &qe); 70 if (e && e->info.u.params.level != SCHED_CLASS_LEVEL_CH_RL) { 71 NL_SET_ERR_MSG_MOD(extack, 72 "Some queues are already bound to different class"); 73 return -EBUSY; 74 } 75 } 76 77 return 0; 78 } 79 80 static int cxgb4_matchall_tc_bind_queues(struct net_device *dev, u32 tc) 81 { 82 struct port_info *pi = netdev2pinfo(dev); 83 struct ch_sched_queue qe; 84 int ret; 85 u32 i; 86 87 for (i = 0; i < pi->nqsets; i++) { 88 qe.queue = i; 89 qe.class = tc; 90 ret = cxgb4_sched_class_bind(dev, &qe, SCHED_QUEUE); 91 if (ret) 92 goto out_free; 93 } 94 95 return 0; 96 97 out_free: 98 while (i--) { 99 qe.queue = i; 100 qe.class = SCHED_CLS_NONE; 101 cxgb4_sched_class_unbind(dev, &qe, SCHED_QUEUE); 102 } 103 104 return ret; 105 } 106 107 static void cxgb4_matchall_tc_unbind_queues(struct net_device *dev) 108 { 109 struct port_info *pi = netdev2pinfo(dev); 110 struct ch_sched_queue qe; 111 u32 i; 112 113 for (i = 0; i < pi->nqsets; i++) { 114 qe.queue = i; 115 qe.class = SCHED_CLS_NONE; 116 cxgb4_sched_class_unbind(dev, &qe, SCHED_QUEUE); 117 } 118 } 119 120 static int cxgb4_matchall_alloc_tc(struct net_device *dev, 121 struct tc_cls_matchall_offload *cls) 122 { 123 struct ch_sched_params p = { 124 .type = SCHED_CLASS_TYPE_PACKET, 125 .u.params.level = SCHED_CLASS_LEVEL_CH_RL, 126 .u.params.mode = SCHED_CLASS_MODE_CLASS, 127 .u.params.rateunit = SCHED_CLASS_RATEUNIT_BITS, 128 .u.params.ratemode = SCHED_CLASS_RATEMODE_ABS, 129 .u.params.class = SCHED_CLS_NONE, 130 .u.params.minrate = 0, 131 .u.params.weight = 0, 132 .u.params.pktsize = dev->mtu, 133 }; 134 struct netlink_ext_ack *extack = cls->common.extack; 135 struct cxgb4_tc_port_matchall *tc_port_matchall; 136 struct port_info *pi = netdev2pinfo(dev); 137 struct adapter *adap = netdev2adap(dev); 138 struct flow_action_entry *entry; 139 struct sched_class *e; 140 int ret; 141 u32 i; 142 143 tc_port_matchall = &adap->tc_matchall->port_matchall[pi->port_id]; 144 145 flow_action_for_each(i, entry, &cls->rule->action) 146 if (entry->id == FLOW_ACTION_POLICE) 147 break; 148 149 /* Convert from bytes per second to Kbps */ 150 p.u.params.maxrate = div_u64(entry->police.rate_bytes_ps * 8, 1000); 151 p.u.params.channel = pi->tx_chan; 152 e = cxgb4_sched_class_alloc(dev, &p); 153 if (!e) { 154 NL_SET_ERR_MSG_MOD(extack, 155 "No free traffic class available for policing action"); 156 return -ENOMEM; 157 } 158 159 ret = cxgb4_matchall_tc_bind_queues(dev, e->idx); 160 if (ret) { 161 NL_SET_ERR_MSG_MOD(extack, 162 "Could not bind queues to traffic class"); 163 goto out_free; 164 } 165 166 tc_port_matchall->egress.hwtc = e->idx; 167 tc_port_matchall->egress.cookie = cls->cookie; 168 tc_port_matchall->egress.state = CXGB4_MATCHALL_STATE_ENABLED; 169 return 0; 170 171 out_free: 172 cxgb4_sched_class_free(dev, e->idx); 173 return ret; 174 } 175 176 static void cxgb4_matchall_free_tc(struct net_device *dev) 177 { 178 struct cxgb4_tc_port_matchall *tc_port_matchall; 179 struct port_info *pi = netdev2pinfo(dev); 180 struct adapter *adap = netdev2adap(dev); 181 182 tc_port_matchall = &adap->tc_matchall->port_matchall[pi->port_id]; 183 cxgb4_matchall_tc_unbind_queues(dev); 184 cxgb4_sched_class_free(dev, tc_port_matchall->egress.hwtc); 185 186 tc_port_matchall->egress.hwtc = SCHED_CLS_NONE; 187 tc_port_matchall->egress.cookie = 0; 188 tc_port_matchall->egress.state = CXGB4_MATCHALL_STATE_DISABLED; 189 } 190 191 static int cxgb4_matchall_alloc_filter(struct net_device *dev, 192 struct tc_cls_matchall_offload *cls) 193 { 194 struct netlink_ext_ack *extack = cls->common.extack; 195 struct cxgb4_tc_port_matchall *tc_port_matchall; 196 struct port_info *pi = netdev2pinfo(dev); 197 struct adapter *adap = netdev2adap(dev); 198 struct ch_filter_specification *fs; 199 int ret, fidx; 200 201 /* Get a free filter entry TID, where we can insert this new 202 * rule. Only insert rule if its prio doesn't conflict with 203 * existing rules. 204 * 205 * 1 slot is enough to create a wildcard matchall VIID rule. 206 */ 207 fidx = cxgb4_get_free_ftid(dev, PF_INET, false, cls->common.prio); 208 if (fidx < 0) { 209 NL_SET_ERR_MSG_MOD(extack, 210 "No free LETCAM index available"); 211 return -ENOMEM; 212 } 213 214 tc_port_matchall = &adap->tc_matchall->port_matchall[pi->port_id]; 215 fs = &tc_port_matchall->ingress.fs; 216 memset(fs, 0, sizeof(*fs)); 217 218 if (fidx < adap->tids.nhpftids) 219 fs->prio = 1; 220 fs->tc_prio = cls->common.prio; 221 fs->tc_cookie = cls->cookie; 222 fs->hitcnts = 1; 223 224 fs->val.pfvf_vld = 1; 225 fs->val.pf = adap->pf; 226 fs->val.vf = pi->vin; 227 228 cxgb4_process_flow_actions(dev, &cls->rule->action, fs); 229 230 ret = cxgb4_set_filter(dev, fidx, fs); 231 if (ret) 232 return ret; 233 234 tc_port_matchall->ingress.tid = fidx; 235 tc_port_matchall->ingress.state = CXGB4_MATCHALL_STATE_ENABLED; 236 return 0; 237 } 238 239 static int cxgb4_matchall_free_filter(struct net_device *dev) 240 { 241 struct cxgb4_tc_port_matchall *tc_port_matchall; 242 struct port_info *pi = netdev2pinfo(dev); 243 struct adapter *adap = netdev2adap(dev); 244 int ret; 245 246 tc_port_matchall = &adap->tc_matchall->port_matchall[pi->port_id]; 247 248 ret = cxgb4_del_filter(dev, tc_port_matchall->ingress.tid, 249 &tc_port_matchall->ingress.fs); 250 if (ret) 251 return ret; 252 253 tc_port_matchall->ingress.packets = 0; 254 tc_port_matchall->ingress.bytes = 0; 255 tc_port_matchall->ingress.last_used = 0; 256 tc_port_matchall->ingress.tid = 0; 257 tc_port_matchall->ingress.state = CXGB4_MATCHALL_STATE_DISABLED; 258 return 0; 259 } 260 261 int cxgb4_tc_matchall_replace(struct net_device *dev, 262 struct tc_cls_matchall_offload *cls_matchall, 263 bool ingress) 264 { 265 struct netlink_ext_ack *extack = cls_matchall->common.extack; 266 struct cxgb4_tc_port_matchall *tc_port_matchall; 267 struct port_info *pi = netdev2pinfo(dev); 268 struct adapter *adap = netdev2adap(dev); 269 int ret; 270 271 tc_port_matchall = &adap->tc_matchall->port_matchall[pi->port_id]; 272 if (ingress) { 273 if (tc_port_matchall->ingress.state == 274 CXGB4_MATCHALL_STATE_ENABLED) { 275 NL_SET_ERR_MSG_MOD(extack, 276 "Only 1 Ingress MATCHALL can be offloaded"); 277 return -ENOMEM; 278 } 279 280 ret = cxgb4_validate_flow_actions(dev, 281 &cls_matchall->rule->action, 282 extack); 283 if (ret) 284 return ret; 285 286 return cxgb4_matchall_alloc_filter(dev, cls_matchall); 287 } 288 289 if (tc_port_matchall->egress.state == CXGB4_MATCHALL_STATE_ENABLED) { 290 NL_SET_ERR_MSG_MOD(extack, 291 "Only 1 Egress MATCHALL can be offloaded"); 292 return -ENOMEM; 293 } 294 295 ret = cxgb4_matchall_egress_validate(dev, cls_matchall); 296 if (ret) 297 return ret; 298 299 return cxgb4_matchall_alloc_tc(dev, cls_matchall); 300 } 301 302 int cxgb4_tc_matchall_destroy(struct net_device *dev, 303 struct tc_cls_matchall_offload *cls_matchall, 304 bool ingress) 305 { 306 struct cxgb4_tc_port_matchall *tc_port_matchall; 307 struct port_info *pi = netdev2pinfo(dev); 308 struct adapter *adap = netdev2adap(dev); 309 310 tc_port_matchall = &adap->tc_matchall->port_matchall[pi->port_id]; 311 if (ingress) { 312 if (cls_matchall->cookie != 313 tc_port_matchall->ingress.fs.tc_cookie) 314 return -ENOENT; 315 316 return cxgb4_matchall_free_filter(dev); 317 } 318 319 if (cls_matchall->cookie != tc_port_matchall->egress.cookie) 320 return -ENOENT; 321 322 cxgb4_matchall_free_tc(dev); 323 return 0; 324 } 325 326 int cxgb4_tc_matchall_stats(struct net_device *dev, 327 struct tc_cls_matchall_offload *cls_matchall) 328 { 329 struct cxgb4_tc_port_matchall *tc_port_matchall; 330 struct port_info *pi = netdev2pinfo(dev); 331 struct adapter *adap = netdev2adap(dev); 332 u64 packets, bytes; 333 int ret; 334 335 tc_port_matchall = &adap->tc_matchall->port_matchall[pi->port_id]; 336 if (tc_port_matchall->ingress.state == CXGB4_MATCHALL_STATE_DISABLED) 337 return -ENOENT; 338 339 ret = cxgb4_get_filter_counters(dev, tc_port_matchall->ingress.tid, 340 &packets, &bytes, 341 tc_port_matchall->ingress.fs.hash); 342 if (ret) 343 return ret; 344 345 if (tc_port_matchall->ingress.packets != packets) { 346 flow_stats_update(&cls_matchall->stats, 347 bytes - tc_port_matchall->ingress.bytes, 348 packets - tc_port_matchall->ingress.packets, 349 0, tc_port_matchall->ingress.last_used, 350 FLOW_ACTION_HW_STATS_IMMEDIATE); 351 352 tc_port_matchall->ingress.packets = packets; 353 tc_port_matchall->ingress.bytes = bytes; 354 tc_port_matchall->ingress.last_used = jiffies; 355 } 356 357 return 0; 358 } 359 360 static void cxgb4_matchall_disable_offload(struct net_device *dev) 361 { 362 struct cxgb4_tc_port_matchall *tc_port_matchall; 363 struct port_info *pi = netdev2pinfo(dev); 364 struct adapter *adap = netdev2adap(dev); 365 366 tc_port_matchall = &adap->tc_matchall->port_matchall[pi->port_id]; 367 if (tc_port_matchall->egress.state == CXGB4_MATCHALL_STATE_ENABLED) 368 cxgb4_matchall_free_tc(dev); 369 370 if (tc_port_matchall->ingress.state == CXGB4_MATCHALL_STATE_ENABLED) 371 cxgb4_matchall_free_filter(dev); 372 } 373 374 int cxgb4_init_tc_matchall(struct adapter *adap) 375 { 376 struct cxgb4_tc_port_matchall *tc_port_matchall; 377 struct cxgb4_tc_matchall *tc_matchall; 378 int ret; 379 380 tc_matchall = kzalloc(sizeof(*tc_matchall), GFP_KERNEL); 381 if (!tc_matchall) 382 return -ENOMEM; 383 384 tc_port_matchall = kcalloc(adap->params.nports, 385 sizeof(*tc_port_matchall), 386 GFP_KERNEL); 387 if (!tc_port_matchall) { 388 ret = -ENOMEM; 389 goto out_free_matchall; 390 } 391 392 tc_matchall->port_matchall = tc_port_matchall; 393 adap->tc_matchall = tc_matchall; 394 return 0; 395 396 out_free_matchall: 397 kfree(tc_matchall); 398 return ret; 399 } 400 401 void cxgb4_cleanup_tc_matchall(struct adapter *adap) 402 { 403 u8 i; 404 405 if (adap->tc_matchall) { 406 if (adap->tc_matchall->port_matchall) { 407 for (i = 0; i < adap->params.nports; i++) { 408 struct net_device *dev = adap->port[i]; 409 410 if (dev) 411 cxgb4_matchall_disable_offload(dev); 412 } 413 kfree(adap->tc_matchall->port_matchall); 414 } 415 kfree(adap->tc_matchall); 416 } 417 } 418