1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB 2 /* Copyright (c) 2021 Mellanox Technologies. */ 3 4 #include <linux/skbuff.h> 5 #include <net/psample.h> 6 #include "en/mapping.h" 7 #include "en/tc/post_act.h" 8 #include "en/tc/act/sample.h" 9 #include "en/mod_hdr.h" 10 #include "sample.h" 11 #include "eswitch.h" 12 #include "en_tc.h" 13 #include "fs_core.h" 14 15 #define MLX5_ESW_VPORT_TBL_SIZE_SAMPLE (64 * 1024) 16 17 static const struct esw_vport_tbl_namespace mlx5_esw_vport_tbl_sample_ns = { 18 .max_fte = MLX5_ESW_VPORT_TBL_SIZE_SAMPLE, 19 .max_num_groups = 0, /* default num of groups */ 20 .flags = MLX5_FLOW_TABLE_TUNNEL_EN_REFORMAT | MLX5_FLOW_TABLE_TUNNEL_EN_DECAP, 21 }; 22 23 struct mlx5e_tc_psample { 24 struct mlx5_eswitch *esw; 25 struct mlx5_flow_table *termtbl; 26 struct mlx5_flow_handle *termtbl_rule; 27 DECLARE_HASHTABLE(hashtbl, 8); 28 struct mutex ht_lock; /* protect hashtbl */ 29 DECLARE_HASHTABLE(restore_hashtbl, 8); 30 struct mutex restore_lock; /* protect restore_hashtbl */ 31 struct mlx5e_post_act *post_act; 32 }; 33 34 struct mlx5e_sampler { 35 struct hlist_node hlist; 36 u32 sampler_id; 37 u32 sample_ratio; 38 u32 sample_table_id; 39 u32 default_table_id; 40 int count; 41 }; 42 43 struct mlx5e_sample_flow { 44 struct mlx5e_sampler *sampler; 45 struct mlx5e_sample_restore *restore; 46 struct mlx5_flow_attr *pre_attr; 47 struct mlx5_flow_handle *pre_rule; 48 struct mlx5_flow_attr *post_attr; 49 struct mlx5_flow_handle *post_rule; 50 }; 51 52 struct mlx5e_sample_restore { 53 struct hlist_node hlist; 54 struct mlx5_modify_hdr *modify_hdr; 55 struct mlx5_flow_handle *rule; 56 u32 obj_id; 57 int count; 58 }; 59 60 static int 61 sampler_termtbl_create(struct mlx5e_tc_psample *tc_psample) 62 { 63 struct mlx5_eswitch *esw = tc_psample->esw; 64 struct mlx5_flow_table_attr ft_attr = {}; 65 struct mlx5_flow_destination dest = {}; 66 struct mlx5_core_dev *dev = esw->dev; 67 struct mlx5_flow_namespace *root_ns; 68 struct mlx5_flow_act act = {}; 69 int err; 70 71 if (!MLX5_CAP_ESW_FLOWTABLE_FDB(dev, termination_table)) { 72 mlx5_core_warn(dev, "termination table is not supported\n"); 73 return -EOPNOTSUPP; 74 } 75 76 root_ns = mlx5_get_flow_namespace(dev, MLX5_FLOW_NAMESPACE_FDB); 77 if (!root_ns) { 78 mlx5_core_warn(dev, "failed to get FDB flow namespace\n"); 79 return -EOPNOTSUPP; 80 } 81 82 ft_attr.flags = MLX5_FLOW_TABLE_TERMINATION | MLX5_FLOW_TABLE_UNMANAGED; 83 ft_attr.autogroup.max_num_groups = 1; 84 ft_attr.prio = FDB_SLOW_PATH; 85 ft_attr.max_fte = 1; 86 ft_attr.level = 1; 87 tc_psample->termtbl = mlx5_create_auto_grouped_flow_table(root_ns, &ft_attr); 88 if (IS_ERR(tc_psample->termtbl)) { 89 err = PTR_ERR(tc_psample->termtbl); 90 mlx5_core_warn(dev, "failed to create termtbl, err: %d\n", err); 91 return err; 92 } 93 94 act.action = MLX5_FLOW_CONTEXT_ACTION_FWD_DEST; 95 dest.vport.num = esw->manager_vport; 96 tc_psample->termtbl_rule = mlx5_add_flow_rules(tc_psample->termtbl, NULL, &act, &dest, 1); 97 if (IS_ERR(tc_psample->termtbl_rule)) { 98 err = PTR_ERR(tc_psample->termtbl_rule); 99 mlx5_core_warn(dev, "failed to create termtbl rule, err: %d\n", err); 100 mlx5_destroy_flow_table(tc_psample->termtbl); 101 return err; 102 } 103 104 return 0; 105 } 106 107 static void 108 sampler_termtbl_destroy(struct mlx5e_tc_psample *tc_psample) 109 { 110 mlx5_del_flow_rules(tc_psample->termtbl_rule); 111 mlx5_destroy_flow_table(tc_psample->termtbl); 112 } 113 114 static int 115 sampler_obj_create(struct mlx5_core_dev *mdev, struct mlx5e_sampler *sampler) 116 { 117 u32 in[MLX5_ST_SZ_DW(create_sampler_obj_in)] = {}; 118 u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)]; 119 u64 general_obj_types; 120 void *obj; 121 int err; 122 123 general_obj_types = MLX5_CAP_GEN_64(mdev, general_obj_types); 124 if (!(general_obj_types & MLX5_HCA_CAP_GENERAL_OBJECT_TYPES_SAMPLER)) 125 return -EOPNOTSUPP; 126 if (!MLX5_CAP_ESW_FLOWTABLE_FDB(mdev, ignore_flow_level)) 127 return -EOPNOTSUPP; 128 129 obj = MLX5_ADDR_OF(create_sampler_obj_in, in, sampler_object); 130 MLX5_SET(sampler_obj, obj, table_type, FS_FT_FDB); 131 MLX5_SET(sampler_obj, obj, ignore_flow_level, 1); 132 MLX5_SET(sampler_obj, obj, level, 1); 133 MLX5_SET(sampler_obj, obj, sample_ratio, sampler->sample_ratio); 134 MLX5_SET(sampler_obj, obj, sample_table_id, sampler->sample_table_id); 135 MLX5_SET(sampler_obj, obj, default_table_id, sampler->default_table_id); 136 MLX5_SET(general_obj_in_cmd_hdr, in, opcode, MLX5_CMD_OP_CREATE_GENERAL_OBJECT); 137 MLX5_SET(general_obj_in_cmd_hdr, in, obj_type, MLX5_GENERAL_OBJECT_TYPES_SAMPLER); 138 139 err = mlx5_cmd_exec(mdev, in, sizeof(in), out, sizeof(out)); 140 if (!err) 141 sampler->sampler_id = MLX5_GET(general_obj_out_cmd_hdr, out, obj_id); 142 143 return err; 144 } 145 146 static void 147 sampler_obj_destroy(struct mlx5_core_dev *mdev, u32 sampler_id) 148 { 149 u32 in[MLX5_ST_SZ_DW(general_obj_in_cmd_hdr)] = {}; 150 u32 out[MLX5_ST_SZ_DW(general_obj_out_cmd_hdr)]; 151 152 MLX5_SET(general_obj_in_cmd_hdr, in, opcode, MLX5_CMD_OP_DESTROY_GENERAL_OBJECT); 153 MLX5_SET(general_obj_in_cmd_hdr, in, obj_type, MLX5_GENERAL_OBJECT_TYPES_SAMPLER); 154 MLX5_SET(general_obj_in_cmd_hdr, in, obj_id, sampler_id); 155 156 mlx5_cmd_exec(mdev, in, sizeof(in), out, sizeof(out)); 157 } 158 159 static u32 160 sampler_hash(u32 sample_ratio, u32 default_table_id) 161 { 162 return jhash_2words(sample_ratio, default_table_id, 0); 163 } 164 165 static int 166 sampler_cmp(u32 sample_ratio1, u32 default_table_id1, u32 sample_ratio2, u32 default_table_id2) 167 { 168 return sample_ratio1 != sample_ratio2 || default_table_id1 != default_table_id2; 169 } 170 171 static struct mlx5e_sampler * 172 sampler_get(struct mlx5e_tc_psample *tc_psample, u32 sample_ratio, u32 default_table_id) 173 { 174 struct mlx5e_sampler *sampler; 175 u32 hash_key; 176 int err; 177 178 mutex_lock(&tc_psample->ht_lock); 179 hash_key = sampler_hash(sample_ratio, default_table_id); 180 hash_for_each_possible(tc_psample->hashtbl, sampler, hlist, hash_key) 181 if (!sampler_cmp(sampler->sample_ratio, sampler->default_table_id, 182 sample_ratio, default_table_id)) 183 goto add_ref; 184 185 sampler = kzalloc(sizeof(*sampler), GFP_KERNEL); 186 if (!sampler) { 187 err = -ENOMEM; 188 goto err_alloc; 189 } 190 191 sampler->sample_table_id = tc_psample->termtbl->id; 192 sampler->default_table_id = default_table_id; 193 sampler->sample_ratio = sample_ratio; 194 195 err = sampler_obj_create(tc_psample->esw->dev, sampler); 196 if (err) 197 goto err_create; 198 199 hash_add(tc_psample->hashtbl, &sampler->hlist, hash_key); 200 201 add_ref: 202 sampler->count++; 203 mutex_unlock(&tc_psample->ht_lock); 204 return sampler; 205 206 err_create: 207 kfree(sampler); 208 err_alloc: 209 mutex_unlock(&tc_psample->ht_lock); 210 return ERR_PTR(err); 211 } 212 213 static void 214 sampler_put(struct mlx5e_tc_psample *tc_psample, struct mlx5e_sampler *sampler) 215 { 216 mutex_lock(&tc_psample->ht_lock); 217 if (--sampler->count == 0) { 218 hash_del(&sampler->hlist); 219 sampler_obj_destroy(tc_psample->esw->dev, sampler->sampler_id); 220 kfree(sampler); 221 } 222 mutex_unlock(&tc_psample->ht_lock); 223 } 224 225 /* obj_id is used to restore the sample parameters. 226 * Set fte_id in original flow table, then match it in the default table. 227 * Only set it for NICs can preserve reg_c or decap action. For other cases, 228 * use the same match in the default table. 229 * Use one header rewrite for both obj_id and fte_id. 230 */ 231 static struct mlx5_modify_hdr * 232 sample_modify_hdr_get(struct mlx5_core_dev *mdev, u32 obj_id, 233 struct mlx5e_tc_mod_hdr_acts *mod_acts) 234 { 235 struct mlx5_modify_hdr *modify_hdr; 236 int err; 237 238 err = mlx5e_tc_match_to_reg_set(mdev, mod_acts, MLX5_FLOW_NAMESPACE_FDB, 239 CHAIN_TO_REG, obj_id); 240 if (err) 241 goto err_set_regc0; 242 243 modify_hdr = mlx5_modify_header_alloc(mdev, MLX5_FLOW_NAMESPACE_FDB, 244 mod_acts->num_actions, 245 mod_acts->actions); 246 if (IS_ERR(modify_hdr)) { 247 err = PTR_ERR(modify_hdr); 248 goto err_modify_hdr; 249 } 250 251 mlx5e_mod_hdr_dealloc(mod_acts); 252 return modify_hdr; 253 254 err_modify_hdr: 255 mlx5e_mod_hdr_dealloc(mod_acts); 256 err_set_regc0: 257 return ERR_PTR(err); 258 } 259 260 static struct mlx5e_sample_restore * 261 sample_restore_get(struct mlx5e_tc_psample *tc_psample, u32 obj_id, 262 struct mlx5e_tc_mod_hdr_acts *mod_acts) 263 { 264 struct mlx5_eswitch *esw = tc_psample->esw; 265 struct mlx5_core_dev *mdev = esw->dev; 266 struct mlx5e_sample_restore *restore; 267 struct mlx5_modify_hdr *modify_hdr; 268 int err; 269 270 mutex_lock(&tc_psample->restore_lock); 271 hash_for_each_possible(tc_psample->restore_hashtbl, restore, hlist, obj_id) 272 if (restore->obj_id == obj_id) 273 goto add_ref; 274 275 restore = kzalloc(sizeof(*restore), GFP_KERNEL); 276 if (!restore) { 277 err = -ENOMEM; 278 goto err_alloc; 279 } 280 restore->obj_id = obj_id; 281 282 modify_hdr = sample_modify_hdr_get(mdev, obj_id, mod_acts); 283 if (IS_ERR(modify_hdr)) { 284 err = PTR_ERR(modify_hdr); 285 goto err_modify_hdr; 286 } 287 restore->modify_hdr = modify_hdr; 288 289 restore->rule = esw_add_restore_rule(esw, obj_id); 290 if (IS_ERR(restore->rule)) { 291 err = PTR_ERR(restore->rule); 292 goto err_restore; 293 } 294 295 hash_add(tc_psample->restore_hashtbl, &restore->hlist, obj_id); 296 add_ref: 297 restore->count++; 298 mutex_unlock(&tc_psample->restore_lock); 299 return restore; 300 301 err_restore: 302 mlx5_modify_header_dealloc(mdev, restore->modify_hdr); 303 err_modify_hdr: 304 kfree(restore); 305 err_alloc: 306 mutex_unlock(&tc_psample->restore_lock); 307 return ERR_PTR(err); 308 } 309 310 static void 311 sample_restore_put(struct mlx5e_tc_psample *tc_psample, struct mlx5e_sample_restore *restore) 312 { 313 mutex_lock(&tc_psample->restore_lock); 314 if (--restore->count == 0) 315 hash_del(&restore->hlist); 316 mutex_unlock(&tc_psample->restore_lock); 317 318 if (!restore->count) { 319 mlx5_del_flow_rules(restore->rule); 320 mlx5_modify_header_dealloc(tc_psample->esw->dev, restore->modify_hdr); 321 kfree(restore); 322 } 323 } 324 325 void mlx5e_tc_sample_skb(struct sk_buff *skb, struct mlx5_mapped_obj *mapped_obj) 326 { 327 u32 trunc_size = mapped_obj->sample.trunc_size; 328 struct psample_group psample_group = {}; 329 struct psample_metadata md = {}; 330 331 md.trunc_size = trunc_size ? min(trunc_size, skb->len) : skb->len; 332 md.in_ifindex = skb->dev->ifindex; 333 psample_group.group_num = mapped_obj->sample.group_id; 334 psample_group.net = &init_net; 335 skb_push(skb, skb->mac_len); 336 337 psample_sample_packet(&psample_group, skb, mapped_obj->sample.rate, &md); 338 } 339 340 static int 341 add_post_rule(struct mlx5_eswitch *esw, struct mlx5e_sample_flow *sample_flow, 342 struct mlx5_flow_spec *spec, struct mlx5_flow_attr *attr, 343 u32 *default_tbl_id) 344 { 345 struct mlx5_esw_flow_attr *esw_attr = attr->esw_attr; 346 u32 attr_sz = ns_to_attr_sz(MLX5_FLOW_NAMESPACE_FDB); 347 struct mlx5_vport_tbl_attr per_vport_tbl_attr; 348 struct mlx5_flow_table *default_tbl; 349 struct mlx5_flow_attr *post_attr; 350 int err; 351 352 /* Allocate default table per vport, chain and prio. Otherwise, there is 353 * only one default table for the same sampler object. Rules with different 354 * prio and chain may overlap. For CT sample action, per vport default 355 * table is needed to resotre the metadata. 356 */ 357 per_vport_tbl_attr.chain = attr->chain; 358 per_vport_tbl_attr.prio = attr->prio; 359 per_vport_tbl_attr.vport = esw_attr->in_rep->vport; 360 per_vport_tbl_attr.vport_ns = &mlx5_esw_vport_tbl_sample_ns; 361 default_tbl = mlx5_esw_vporttbl_get(esw, &per_vport_tbl_attr); 362 if (IS_ERR(default_tbl)) { 363 err = PTR_ERR(default_tbl); 364 goto err_default_tbl; 365 } 366 *default_tbl_id = default_tbl->id; 367 368 post_attr = mlx5_alloc_flow_attr(MLX5_FLOW_NAMESPACE_FDB); 369 if (!post_attr) { 370 err = -ENOMEM; 371 goto err_attr; 372 } 373 sample_flow->post_attr = post_attr; 374 memcpy(post_attr, attr, attr_sz); 375 /* Perform the original matches on the default table. 376 * Offload all actions except the sample action. 377 */ 378 post_attr->chain = 0; 379 post_attr->prio = 0; 380 post_attr->ft = default_tbl; 381 post_attr->flags = MLX5_ATTR_FLAG_NO_IN_PORT; 382 383 /* When offloading sample and encap action, if there is no valid 384 * neigh data struct, a slow path rule is offloaded first. Source 385 * port metadata match is set at that time. A per vport table is 386 * already allocated. No need to match it again. So clear the source 387 * port metadata match. 388 */ 389 mlx5_eswitch_clear_rule_source_port(esw, spec); 390 sample_flow->post_rule = mlx5_eswitch_add_offloaded_rule(esw, spec, post_attr); 391 if (IS_ERR(sample_flow->post_rule)) { 392 err = PTR_ERR(sample_flow->post_rule); 393 goto err_rule; 394 } 395 return 0; 396 397 err_rule: 398 kfree(post_attr); 399 err_attr: 400 mlx5_esw_vporttbl_put(esw, &per_vport_tbl_attr); 401 err_default_tbl: 402 return err; 403 } 404 405 static void 406 del_post_rule(struct mlx5_eswitch *esw, struct mlx5e_sample_flow *sample_flow, 407 struct mlx5_flow_attr *attr) 408 { 409 struct mlx5_esw_flow_attr *esw_attr = attr->esw_attr; 410 struct mlx5_vport_tbl_attr tbl_attr; 411 412 mlx5_eswitch_del_offloaded_rule(esw, sample_flow->post_rule, sample_flow->post_attr); 413 kfree(sample_flow->post_attr); 414 tbl_attr.chain = attr->chain; 415 tbl_attr.prio = attr->prio; 416 tbl_attr.vport = esw_attr->in_rep->vport; 417 tbl_attr.vport_ns = &mlx5_esw_vport_tbl_sample_ns; 418 mlx5_esw_vporttbl_put(esw, &tbl_attr); 419 } 420 421 /* For the following typical flow table: 422 * 423 * +-------------------------------+ 424 * + original flow table + 425 * +-------------------------------+ 426 * + original match + 427 * +-------------------------------+ 428 * + sample action + other actions + 429 * +-------------------------------+ 430 * 431 * We translate the tc filter with sample action to the following HW model: 432 * 433 * +---------------------+ 434 * + original flow table + 435 * +---------------------+ 436 * + original match + 437 * +---------------------+ 438 * | set fte_id (if reg_c preserve cap) 439 * | do decap (if required) 440 * v 441 * +------------------------------------------------+ 442 * + Flow Sampler Object + 443 * +------------------------------------------------+ 444 * + sample ratio + 445 * +------------------------------------------------+ 446 * + sample table id | default table id + 447 * +------------------------------------------------+ 448 * | | 449 * v v 450 * +-----------------------------+ +-------------------+ 451 * + sample table + + default table + 452 * +-----------------------------+ +-------------------+ 453 * + forward to management vport + | 454 * +-----------------------------+ | 455 * +-------+------+ 456 * | |reg_c preserve cap 457 * | |or decap action 458 * v v 459 * +-----------------+ +-------------+ 460 * + per vport table + + post action + 461 * +-----------------+ +-------------+ 462 * + original match + 463 * +-----------------+ 464 * + other actions + 465 * +-----------------+ 466 */ 467 struct mlx5_flow_handle * 468 mlx5e_tc_sample_offload(struct mlx5e_tc_psample *tc_psample, 469 struct mlx5_flow_spec *spec, 470 struct mlx5_flow_attr *attr) 471 { 472 struct mlx5_esw_flow_attr *esw_attr = attr->esw_attr; 473 struct mlx5_esw_flow_attr *pre_esw_attr; 474 struct mlx5_mapped_obj restore_obj = {}; 475 struct mlx5e_tc_mod_hdr_acts *mod_acts; 476 struct mlx5e_sample_flow *sample_flow; 477 struct mlx5e_sample_attr *sample_attr; 478 struct mlx5_flow_attr *pre_attr; 479 u32 tunnel_id = attr->tunnel_id; 480 struct mlx5_eswitch *esw; 481 u32 default_tbl_id; 482 u32 obj_id; 483 int err; 484 485 if (IS_ERR_OR_NULL(tc_psample)) 486 return ERR_PTR(-EOPNOTSUPP); 487 488 sample_flow = kzalloc(sizeof(*sample_flow), GFP_KERNEL); 489 if (!sample_flow) 490 return ERR_PTR(-ENOMEM); 491 sample_attr = &attr->sample_attr; 492 sample_attr->sample_flow = sample_flow; 493 494 /* For NICs with reg_c_preserve support or decap action, use 495 * post action instead of the per vport, chain and prio table. 496 * Only match the fte id instead of the same match in the 497 * original flow table. 498 */ 499 esw = tc_psample->esw; 500 if (mlx5e_tc_act_sample_is_multi_table(esw->dev, attr)) { 501 struct mlx5_flow_table *ft; 502 503 ft = mlx5e_tc_post_act_get_ft(tc_psample->post_act); 504 default_tbl_id = ft->id; 505 } else { 506 err = add_post_rule(esw, sample_flow, spec, attr, &default_tbl_id); 507 if (err) 508 goto err_post_rule; 509 } 510 511 /* Create sampler object. */ 512 sample_flow->sampler = sampler_get(tc_psample, sample_attr->rate, default_tbl_id); 513 if (IS_ERR(sample_flow->sampler)) { 514 err = PTR_ERR(sample_flow->sampler); 515 goto err_sampler; 516 } 517 sample_attr->sampler_id = sample_flow->sampler->sampler_id; 518 519 /* Create an id mapping reg_c0 value to sample object. */ 520 restore_obj.type = MLX5_MAPPED_OBJ_SAMPLE; 521 restore_obj.sample.group_id = sample_attr->group_num; 522 restore_obj.sample.rate = sample_attr->rate; 523 restore_obj.sample.trunc_size = sample_attr->trunc_size; 524 restore_obj.sample.tunnel_id = tunnel_id; 525 err = mapping_add(esw->offloads.reg_c0_obj_pool, &restore_obj, &obj_id); 526 if (err) 527 goto err_obj_id; 528 sample_attr->restore_obj_id = obj_id; 529 530 /* Create sample restore context. */ 531 mod_acts = &attr->parse_attr->mod_hdr_acts; 532 sample_flow->restore = sample_restore_get(tc_psample, obj_id, mod_acts); 533 if (IS_ERR(sample_flow->restore)) { 534 err = PTR_ERR(sample_flow->restore); 535 goto err_sample_restore; 536 } 537 538 /* Perform the original matches on the original table. Offload the 539 * sample action. The destination is the sampler object. 540 */ 541 pre_attr = mlx5_alloc_flow_attr(MLX5_FLOW_NAMESPACE_FDB); 542 if (!pre_attr) { 543 err = -ENOMEM; 544 goto err_alloc_pre_flow_attr; 545 } 546 pre_attr->action = MLX5_FLOW_CONTEXT_ACTION_FWD_DEST | MLX5_FLOW_CONTEXT_ACTION_MOD_HDR; 547 /* For decap action, do decap in the original flow table instead of the 548 * default flow table. 549 */ 550 if (tunnel_id) 551 pre_attr->action |= MLX5_FLOW_CONTEXT_ACTION_DECAP; 552 pre_attr->modify_hdr = sample_flow->restore->modify_hdr; 553 pre_attr->flags = MLX5_ATTR_FLAG_SAMPLE; 554 pre_attr->inner_match_level = attr->inner_match_level; 555 pre_attr->outer_match_level = attr->outer_match_level; 556 pre_attr->chain = attr->chain; 557 pre_attr->prio = attr->prio; 558 pre_attr->ft = attr->ft; 559 pre_attr->sample_attr = *sample_attr; 560 pre_esw_attr = pre_attr->esw_attr; 561 pre_esw_attr->in_mdev = esw_attr->in_mdev; 562 pre_esw_attr->in_rep = esw_attr->in_rep; 563 sample_flow->pre_rule = mlx5_eswitch_add_offloaded_rule(esw, spec, pre_attr); 564 if (IS_ERR(sample_flow->pre_rule)) { 565 err = PTR_ERR(sample_flow->pre_rule); 566 goto err_pre_offload_rule; 567 } 568 sample_flow->pre_attr = pre_attr; 569 570 return sample_flow->pre_rule; 571 572 err_pre_offload_rule: 573 kfree(pre_attr); 574 err_alloc_pre_flow_attr: 575 sample_restore_put(tc_psample, sample_flow->restore); 576 err_sample_restore: 577 mapping_remove(esw->offloads.reg_c0_obj_pool, obj_id); 578 err_obj_id: 579 sampler_put(tc_psample, sample_flow->sampler); 580 err_sampler: 581 if (sample_flow->post_rule) 582 del_post_rule(esw, sample_flow, attr); 583 err_post_rule: 584 kfree(sample_flow); 585 return ERR_PTR(err); 586 } 587 588 void 589 mlx5e_tc_sample_unoffload(struct mlx5e_tc_psample *tc_psample, 590 struct mlx5_flow_handle *rule, 591 struct mlx5_flow_attr *attr) 592 { 593 struct mlx5e_sample_flow *sample_flow; 594 struct mlx5_eswitch *esw; 595 596 if (IS_ERR_OR_NULL(tc_psample)) 597 return; 598 599 /* The following delete order can't be changed, otherwise, 600 * will hit fw syndromes. 601 */ 602 esw = tc_psample->esw; 603 sample_flow = attr->sample_attr.sample_flow; 604 mlx5_eswitch_del_offloaded_rule(esw, sample_flow->pre_rule, sample_flow->pre_attr); 605 606 sample_restore_put(tc_psample, sample_flow->restore); 607 mapping_remove(esw->offloads.reg_c0_obj_pool, attr->sample_attr.restore_obj_id); 608 sampler_put(tc_psample, sample_flow->sampler); 609 if (sample_flow->post_rule) 610 del_post_rule(esw, sample_flow, attr); 611 612 kfree(sample_flow->pre_attr); 613 kfree(sample_flow); 614 } 615 616 struct mlx5e_tc_psample * 617 mlx5e_tc_sample_init(struct mlx5_eswitch *esw, struct mlx5e_post_act *post_act) 618 { 619 struct mlx5e_tc_psample *tc_psample; 620 int err; 621 622 tc_psample = kzalloc(sizeof(*tc_psample), GFP_KERNEL); 623 if (!tc_psample) 624 return ERR_PTR(-ENOMEM); 625 if (IS_ERR_OR_NULL(post_act)) { 626 err = PTR_ERR(post_act); 627 goto err_post_act; 628 } 629 tc_psample->post_act = post_act; 630 tc_psample->esw = esw; 631 err = sampler_termtbl_create(tc_psample); 632 if (err) 633 goto err_post_act; 634 635 mutex_init(&tc_psample->ht_lock); 636 mutex_init(&tc_psample->restore_lock); 637 638 return tc_psample; 639 640 err_post_act: 641 kfree(tc_psample); 642 return ERR_PTR(err); 643 } 644 645 void 646 mlx5e_tc_sample_cleanup(struct mlx5e_tc_psample *tc_psample) 647 { 648 if (IS_ERR_OR_NULL(tc_psample)) 649 return; 650 651 mutex_destroy(&tc_psample->restore_lock); 652 mutex_destroy(&tc_psample->ht_lock); 653 sampler_termtbl_destroy(tc_psample); 654 kfree(tc_psample); 655 } 656