drivers/net/ethernet/mellanox/mlx5/core/fs_core.c

   1 /*
   2  * Copyright (c) 2015, Mellanox Technologies. All rights reserved.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * OpenIB.org BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32
  33 #include <linux/mutex.h>
  34 #include <linux/mlx5/driver.h>
  35
  36 #include "mlx5_core.h"
  37 #include "fs_core.h"
  38 #include "fs_cmd.h"
  39 #include "diag/fs_tracepoint.h"
  40 #include "accel/ipsec.h"
  41 #include "fpga/ipsec.h"
  42
  43 #define INIT_TREE_NODE_ARRAY_SIZE(...)  (sizeof((struct init_tree_node[]){__VA_ARGS__}) /\
  44                                          sizeof(struct init_tree_node))
  45
  46 #define ADD_PRIO(num_prios_val, min_level_val, num_levels_val, caps_val,\
  47                  ...) {.type = FS_TYPE_PRIO,\
  48         .min_ft_level = min_level_val,\
  49         .num_levels = num_levels_val,\
  50         .num_leaf_prios = num_prios_val,\
  51         .caps = caps_val,\
  52         .children = (struct init_tree_node[]) {__VA_ARGS__},\
  53         .ar_size = INIT_TREE_NODE_ARRAY_SIZE(__VA_ARGS__) \
  54 }
  55
  56 #define ADD_MULTIPLE_PRIO(num_prios_val, num_levels_val, ...)\
  57         ADD_PRIO(num_prios_val, 0, num_levels_val, {},\
  58                  __VA_ARGS__)\
  59
  60 #define ADD_NS(...) {.type = FS_TYPE_NAMESPACE,\
  61         .children = (struct init_tree_node[]) {__VA_ARGS__},\
  62         .ar_size = INIT_TREE_NODE_ARRAY_SIZE(__VA_ARGS__) \
  63 }
  64
  65 #define INIT_CAPS_ARRAY_SIZE(...) (sizeof((long[]){__VA_ARGS__}) /\
  66                                    sizeof(long))
  67
  68 #define FS_CAP(cap) (__mlx5_bit_off(flow_table_nic_cap, cap))
  69
  70 #define FS_REQUIRED_CAPS(...) {.arr_sz = INIT_CAPS_ARRAY_SIZE(__VA_ARGS__), \
  71                                .caps = (long[]) {__VA_ARGS__} }
  72
  73 #define FS_CHAINING_CAPS  FS_REQUIRED_CAPS(FS_CAP(flow_table_properties_nic_receive.flow_modify_en), \
  74                                            FS_CAP(flow_table_properties_nic_receive.modify_root), \
  75                                            FS_CAP(flow_table_properties_nic_receive.identified_miss_table_mode), \
  76                                            FS_CAP(flow_table_properties_nic_receive.flow_table_modify))
  77
  78 #define LEFTOVERS_NUM_LEVELS 1
  79 #define LEFTOVERS_NUM_PRIOS 1
  80
  81 #define BY_PASS_PRIO_NUM_LEVELS 1
  82 #define BY_PASS_MIN_LEVEL (ETHTOOL_MIN_LEVEL + MLX5_BY_PASS_NUM_PRIOS +\
  83                            LEFTOVERS_NUM_PRIOS)
  84
  85 #define ETHTOOL_PRIO_NUM_LEVELS 1
  86 #define ETHTOOL_NUM_PRIOS 11
  87 #define ETHTOOL_MIN_LEVEL (KERNEL_MIN_LEVEL + ETHTOOL_NUM_PRIOS)
  88 /* Vlan, mac, ttc, inner ttc, aRFS */
  89 #define KERNEL_NIC_PRIO_NUM_LEVELS 5
  90 #define KERNEL_NIC_NUM_PRIOS 1
  91 /* One more level for tc */
  92 #define KERNEL_MIN_LEVEL (KERNEL_NIC_PRIO_NUM_LEVELS + 1)
  93
  94 #define KERNEL_NIC_TC_NUM_PRIOS  1
  95 #define KERNEL_NIC_TC_NUM_LEVELS 2
  96
  97 #define ANCHOR_NUM_LEVELS 1
  98 #define ANCHOR_NUM_PRIOS 1
  99 #define ANCHOR_MIN_LEVEL (BY_PASS_MIN_LEVEL + 1)
 100
 101 #define OFFLOADS_MAX_FT 1
 102 #define OFFLOADS_NUM_PRIOS 1
 103 #define OFFLOADS_MIN_LEVEL (ANCHOR_MIN_LEVEL + 1)
 104
 105 #define LAG_PRIO_NUM_LEVELS 1
 106 #define LAG_NUM_PRIOS 1
 107 #define LAG_MIN_LEVEL (OFFLOADS_MIN_LEVEL + 1)
 108
 109 struct node_caps {
 110         size_t  arr_sz;
 111         long    *caps;
 112 };
 113
 114 static struct init_tree_node {
 115         enum fs_node_type       type;
 116         struct init_tree_node *children;
 117         int ar_size;
 118         struct node_caps caps;
 119         int min_ft_level;
 120         int num_leaf_prios;
 121         int prio;
 122         int num_levels;
 123 } root_fs = {
 124         .type = FS_TYPE_NAMESPACE,
 125         .ar_size = 7,
 126         .children = (struct init_tree_node[]) {
 127                 ADD_PRIO(0, BY_PASS_MIN_LEVEL, 0,
 128                          FS_CHAINING_CAPS,
 129                          ADD_NS(ADD_MULTIPLE_PRIO(MLX5_BY_PASS_NUM_PRIOS,
 130                                                   BY_PASS_PRIO_NUM_LEVELS))),
 131                 ADD_PRIO(0, LAG_MIN_LEVEL, 0,
 132                          FS_CHAINING_CAPS,
 133                          ADD_NS(ADD_MULTIPLE_PRIO(LAG_NUM_PRIOS,
 134                                                   LAG_PRIO_NUM_LEVELS))),
 135                 ADD_PRIO(0, OFFLOADS_MIN_LEVEL, 0, {},
 136                          ADD_NS(ADD_MULTIPLE_PRIO(OFFLOADS_NUM_PRIOS, OFFLOADS_MAX_FT))),
 137                 ADD_PRIO(0, ETHTOOL_MIN_LEVEL, 0,
 138                          FS_CHAINING_CAPS,
 139                          ADD_NS(ADD_MULTIPLE_PRIO(ETHTOOL_NUM_PRIOS,
 140                                                   ETHTOOL_PRIO_NUM_LEVELS))),
 141                 ADD_PRIO(0, KERNEL_MIN_LEVEL, 0, {},
 142                          ADD_NS(ADD_MULTIPLE_PRIO(KERNEL_NIC_TC_NUM_PRIOS, KERNEL_NIC_TC_NUM_LEVELS),
 143                                 ADD_MULTIPLE_PRIO(KERNEL_NIC_NUM_PRIOS,
 144                                                   KERNEL_NIC_PRIO_NUM_LEVELS))),
 145                 ADD_PRIO(0, BY_PASS_MIN_LEVEL, 0,
 146                          FS_CHAINING_CAPS,
 147                          ADD_NS(ADD_MULTIPLE_PRIO(LEFTOVERS_NUM_PRIOS, LEFTOVERS_NUM_LEVELS))),
 148                 ADD_PRIO(0, ANCHOR_MIN_LEVEL, 0, {},
 149                          ADD_NS(ADD_MULTIPLE_PRIO(ANCHOR_NUM_PRIOS, ANCHOR_NUM_LEVELS))),
 150         }
 151 };
 152
 153 enum fs_i_lock_class {
 154         FS_LOCK_GRANDPARENT,
 155         FS_LOCK_PARENT,
 156         FS_LOCK_CHILD
 157 };
 158
 159 static const struct rhashtable_params rhash_fte = {
 160         .key_len = FIELD_SIZEOF(struct fs_fte, val),
 161         .key_offset = offsetof(struct fs_fte, val),
 162         .head_offset = offsetof(struct fs_fte, hash),
 163         .automatic_shrinking = true,
 164         .min_size = 1,
 165 };
 166
 167 static const struct rhashtable_params rhash_fg = {
 168         .key_len = FIELD_SIZEOF(struct mlx5_flow_group, mask),
 169         .key_offset = offsetof(struct mlx5_flow_group, mask),
 170         .head_offset = offsetof(struct mlx5_flow_group, hash),
 171         .automatic_shrinking = true,
 172         .min_size = 1,
 173
 174 };
 175
 176 static void del_hw_flow_table(struct fs_node *node);
 177 static void del_hw_flow_group(struct fs_node *node);
 178 static void del_hw_fte(struct fs_node *node);
 179 static void del_sw_flow_table(struct fs_node *node);
 180 static void del_sw_flow_group(struct fs_node *node);
 181 static void del_sw_fte(struct fs_node *node);
 182 static void del_sw_prio(struct fs_node *node);
 183 static void del_sw_ns(struct fs_node *node);
 184 /* Delete rule (destination) is special case that
 185  * requires to lock the FTE for all the deletion process.
 186  */
 187 static void del_sw_hw_rule(struct fs_node *node);
 188 static bool mlx5_flow_dests_cmp(struct mlx5_flow_destination *d1,
 189                                 struct mlx5_flow_destination *d2);
 190 static void cleanup_root_ns(struct mlx5_flow_root_namespace *root_ns);
 191 static struct mlx5_flow_rule *
 192 find_flow_rule(struct fs_fte *fte,
 193                struct mlx5_flow_destination *dest);
 194
 195 static void tree_init_node(struct fs_node *node,
 196                            void (*del_hw_func)(struct fs_node *),
 197                            void (*del_sw_func)(struct fs_node *))
 198 {
 199         refcount_set(&node->refcount, 1);
 200         INIT_LIST_HEAD(&node->list);
 201         INIT_LIST_HEAD(&node->children);
 202         init_rwsem(&node->lock);
 203         node->del_hw_func = del_hw_func;
 204         node->del_sw_func = del_sw_func;
 205         node->active = false;
 206 }
 207
 208 static void tree_add_node(struct fs_node *node, struct fs_node *parent)
 209 {
 210         if (parent)
 211                 refcount_inc(&parent->refcount);
 212         node->parent = parent;
 213
 214         /* Parent is the root */
 215         if (!parent)
 216                 node->root = node;
 217         else
 218                 node->root = parent->root;
 219 }
 220
 221 static int tree_get_node(struct fs_node *node)
 222 {
 223         return refcount_inc_not_zero(&node->refcount);
 224 }
 225
 226 static void nested_down_read_ref_node(struct fs_node *node,
 227                                       enum fs_i_lock_class class)
 228 {
 229         if (node) {
 230                 down_read_nested(&node->lock, class);
 231                 refcount_inc(&node->refcount);
 232         }
 233 }
 234
 235 static void nested_down_write_ref_node(struct fs_node *node,
 236                                        enum fs_i_lock_class class)
 237 {
 238         if (node) {
 239                 down_write_nested(&node->lock, class);
 240                 refcount_inc(&node->refcount);
 241         }
 242 }
 243
 244 static void down_write_ref_node(struct fs_node *node)
 245 {
 246         if (node) {
 247                 down_write(&node->lock);
 248                 refcount_inc(&node->refcount);
 249         }
 250 }
 251
 252 static void up_read_ref_node(struct fs_node *node)
 253 {
 254         refcount_dec(&node->refcount);
 255         up_read(&node->lock);
 256 }
 257
 258 static void up_write_ref_node(struct fs_node *node)
 259 {
 260         refcount_dec(&node->refcount);
 261         up_write(&node->lock);
 262 }
 263
 264 static void tree_put_node(struct fs_node *node)
 265 {
 266         struct fs_node *parent_node = node->parent;
 267
 268         if (refcount_dec_and_test(&node->refcount)) {
 269                 if (node->del_hw_func)
 270                         node->del_hw_func(node);
 271                 if (parent_node) {
 272                         /* Only root namespace doesn't have parent and we just
 273                          * need to free its node.
 274                          */
 275                         down_write_ref_node(parent_node);
 276                         list_del_init(&node->list);
 277                         if (node->del_sw_func)
 278                                 node->del_sw_func(node);
 279                         up_write_ref_node(parent_node);
 280                 } else {
 281                         kfree(node);
 282                 }
 283                 node = NULL;
 284         }
 285         if (!node && parent_node)
 286                 tree_put_node(parent_node);
 287 }
 288
 289 static int tree_remove_node(struct fs_node *node)
 290 {
 291         if (refcount_read(&node->refcount) > 1) {
 292                 refcount_dec(&node->refcount);
 293                 return -EEXIST;
 294         }
 295         tree_put_node(node);
 296         return 0;
 297 }
 298
 299 static struct fs_prio *find_prio(struct mlx5_flow_namespace *ns,
 300                                  unsigned int prio)
 301 {
 302         struct fs_prio *iter_prio;
 303
 304         fs_for_each_prio(iter_prio, ns) {
 305                 if (iter_prio->prio == prio)
 306                         return iter_prio;
 307         }
 308
 309         return NULL;
 310 }
 311
 312 static bool check_last_reserved(const u32 *match_criteria)
 313 {
 314         char *match_criteria_reserved =
 315                 MLX5_ADDR_OF(fte_match_param, match_criteria, MLX5_FTE_MATCH_PARAM_RESERVED);
 316
 317         return  !match_criteria_reserved[0] &&
 318                 !memcmp(match_criteria_reserved, match_criteria_reserved + 1,
 319                         MLX5_FLD_SZ_BYTES(fte_match_param,
 320                                           MLX5_FTE_MATCH_PARAM_RESERVED) - 1);
 321 }
 322
 323 static bool check_valid_mask(u8 match_criteria_enable, const u32 *match_criteria)
 324 {
 325         if (match_criteria_enable & ~(
 326                 (1 << MLX5_CREATE_FLOW_GROUP_IN_MATCH_CRITERIA_ENABLE_OUTER_HEADERS)   |
 327                 (1 << MLX5_CREATE_FLOW_GROUP_IN_MATCH_CRITERIA_ENABLE_MISC_PARAMETERS) |
 328                 (1 << MLX5_CREATE_FLOW_GROUP_IN_MATCH_CRITERIA_ENABLE_INNER_HEADERS)))
 329                 return false;
 330
 331         if (!(match_criteria_enable &
 332               1 << MLX5_CREATE_FLOW_GROUP_IN_MATCH_CRITERIA_ENABLE_OUTER_HEADERS)) {
 333                 char *fg_type_mask = MLX5_ADDR_OF(fte_match_param,
 334                                                   match_criteria, outer_headers);
 335
 336                 if (fg_type_mask[0] ||
 337                     memcmp(fg_type_mask, fg_type_mask + 1,
 338                            MLX5_ST_SZ_BYTES(fte_match_set_lyr_2_4) - 1))
 339                         return false;
 340         }
 341
 342         if (!(match_criteria_enable &
 343               1 << MLX5_CREATE_FLOW_GROUP_IN_MATCH_CRITERIA_ENABLE_MISC_PARAMETERS)) {
 344                 char *fg_type_mask = MLX5_ADDR_OF(fte_match_param,
 345                                                   match_criteria, misc_parameters);
 346
 347                 if (fg_type_mask[0] ||
 348                     memcmp(fg_type_mask, fg_type_mask + 1,
 349                            MLX5_ST_SZ_BYTES(fte_match_set_misc) - 1))
 350                         return false;
 351         }
 352
 353         if (!(match_criteria_enable &
 354               1 << MLX5_CREATE_FLOW_GROUP_IN_MATCH_CRITERIA_ENABLE_INNER_HEADERS)) {
 355                 char *fg_type_mask = MLX5_ADDR_OF(fte_match_param,
 356                                                   match_criteria, inner_headers);
 357
 358                 if (fg_type_mask[0] ||
 359                     memcmp(fg_type_mask, fg_type_mask + 1,
 360                            MLX5_ST_SZ_BYTES(fte_match_set_lyr_2_4) - 1))
 361                         return false;
 362         }
 363
 364         return check_last_reserved(match_criteria);
 365 }
 366
 367 static bool check_valid_spec(const struct mlx5_flow_spec *spec)
 368 {
 369         int i;
 370
 371         if (!check_valid_mask(spec->match_criteria_enable, spec->match_criteria)) {
 372                 pr_warn("mlx5_core: Match criteria given mismatches match_criteria_enable\n");
 373                 return false;
 374         }
 375
 376         for (i = 0; i < MLX5_ST_SZ_DW_MATCH_PARAM; i++)
 377                 if (spec->match_value[i] & ~spec->match_criteria[i]) {
 378                         pr_warn("mlx5_core: match_value differs from match_criteria\n");
 379                         return false;
 380                 }
 381
 382         return check_last_reserved(spec->match_value);
 383 }
 384
 385 static struct mlx5_flow_root_namespace *find_root(struct fs_node *node)
 386 {
 387         struct fs_node *root;
 388         struct mlx5_flow_namespace *ns;
 389
 390         root = node->root;
 391
 392         if (WARN_ON(root->type != FS_TYPE_NAMESPACE)) {
 393                 pr_warn("mlx5: flow steering node is not in tree or garbaged\n");
 394                 return NULL;
 395         }
 396
 397         ns = container_of(root, struct mlx5_flow_namespace, node);
 398         return container_of(ns, struct mlx5_flow_root_namespace, ns);
 399 }
 400
 401 static inline struct mlx5_flow_steering *get_steering(struct fs_node *node)
 402 {
 403         struct mlx5_flow_root_namespace *root = find_root(node);
 404
 405         if (root)
 406                 return root->dev->priv.steering;
 407         return NULL;
 408 }
 409
 410 static inline struct mlx5_core_dev *get_dev(struct fs_node *node)
 411 {
 412         struct mlx5_flow_root_namespace *root = find_root(node);
 413
 414         if (root)
 415                 return root->dev;
 416         return NULL;
 417 }
 418
 419 static void del_sw_ns(struct fs_node *node)
 420 {
 421         kfree(node);
 422 }
 423
 424 static void del_sw_prio(struct fs_node *node)
 425 {
 426         kfree(node);
 427 }
 428
 429 static void del_hw_flow_table(struct fs_node *node)
 430 {
 431         struct mlx5_flow_root_namespace *root;
 432         struct mlx5_flow_table *ft;
 433         struct mlx5_core_dev *dev;
 434         int err;
 435
 436         fs_get_obj(ft, node);
 437         dev = get_dev(&ft->node);
 438         root = find_root(&ft->node);
 439
 440         if (node->active) {
 441                 err = root->cmds->destroy_flow_table(dev, ft);
 442                 if (err)
 443                         mlx5_core_warn(dev, "flow steering can't destroy ft\n");
 444         }
 445 }
 446
 447 static void del_sw_flow_table(struct fs_node *node)
 448 {
 449         struct mlx5_flow_table *ft;
 450         struct fs_prio *prio;
 451
 452         fs_get_obj(ft, node);
 453
 454         rhltable_destroy(&ft->fgs_hash);
 455         fs_get_obj(prio, ft->node.parent);
 456         prio->num_ft--;
 457         kfree(ft);
 458 }
 459
 460 static void del_sw_hw_rule(struct fs_node *node)
 461 {
 462         struct mlx5_flow_root_namespace *root;
 463         struct mlx5_flow_rule *rule;
 464         struct mlx5_flow_table *ft;
 465         struct mlx5_flow_group *fg;
 466         struct fs_fte *fte;
 467         int modify_mask;
 468         struct mlx5_core_dev *dev = get_dev(node);
 469         int err;
 470         bool update_fte = false;
 471
 472         fs_get_obj(rule, node);
 473         fs_get_obj(fte, rule->node.parent);
 474         fs_get_obj(fg, fte->node.parent);
 475         fs_get_obj(ft, fg->node.parent);
 476         trace_mlx5_fs_del_rule(rule);
 477         if (rule->sw_action == MLX5_FLOW_CONTEXT_ACTION_FWD_NEXT_PRIO) {
 478                 mutex_lock(&rule->dest_attr.ft->lock);
 479                 list_del(&rule->next_ft);
 480                 mutex_unlock(&rule->dest_attr.ft->lock);
 481         }
 482
 483         if (rule->dest_attr.type == MLX5_FLOW_DESTINATION_TYPE_COUNTER  &&
 484             --fte->dests_size) {
 485                 modify_mask = BIT(MLX5_SET_FTE_MODIFY_ENABLE_MASK_ACTION) |
 486                               BIT(MLX5_SET_FTE_MODIFY_ENABLE_MASK_FLOW_COUNTERS);
 487                 fte->action.action &= ~MLX5_FLOW_CONTEXT_ACTION_COUNT;
 488                 update_fte = true;
 489                 goto out;
 490         }
 491
 492         if ((fte->action.action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST) &&
 493             --fte->dests_size) {
 494                 modify_mask = BIT(MLX5_SET_FTE_MODIFY_ENABLE_MASK_DESTINATION_LIST),
 495                 update_fte = true;
 496         }
 497 out:
 498         root = find_root(&ft->node);
 499         if (update_fte && fte->dests_size) {
 500                 err = root->cmds->update_fte(dev, ft, fg->id, modify_mask, fte);
 501                 if (err)
 502                         mlx5_core_warn(dev,
 503                                        "%s can't del rule fg id=%d fte_index=%d\n",
 504                                        __func__, fg->id, fte->index);
 505         }
 506         kfree(rule);
 507 }
 508
 509 static void del_hw_fte(struct fs_node *node)
 510 {
 511         struct mlx5_flow_root_namespace *root;
 512         struct mlx5_flow_table *ft;
 513         struct mlx5_flow_group *fg;
 514         struct mlx5_core_dev *dev;
 515         struct fs_fte *fte;
 516         int err;
 517
 518         fs_get_obj(fte, node);
 519         fs_get_obj(fg, fte->node.parent);
 520         fs_get_obj(ft, fg->node.parent);
 521
 522         trace_mlx5_fs_del_fte(fte);
 523         dev = get_dev(&ft->node);
 524         root = find_root(&ft->node);
 525         if (node->active) {
 526                 err = root->cmds->delete_fte(dev, ft, fte);
 527                 if (err)
 528                         mlx5_core_warn(dev,
 529                                        "flow steering can't delete fte in index %d of flow group id %d\n",
 530                                        fte->index, fg->id);
 531         }
 532 }
 533
 534 static void del_sw_fte(struct fs_node *node)
 535 {
 536         struct mlx5_flow_steering *steering = get_steering(node);
 537         struct mlx5_flow_group *fg;
 538         struct fs_fte *fte;
 539         int err;
 540
 541         fs_get_obj(fte, node);
 542         fs_get_obj(fg, fte->node.parent);
 543
 544         err = rhashtable_remove_fast(&fg->ftes_hash,
 545                                      &fte->hash,
 546                                      rhash_fte);
 547         WARN_ON(err);
 548         ida_simple_remove(&fg->fte_allocator, fte->index - fg->start_index);
 549         kmem_cache_free(steering->ftes_cache, fte);
 550 }
 551
 552 static void del_hw_flow_group(struct fs_node *node)
 553 {
 554         struct mlx5_flow_root_namespace *root;
 555         struct mlx5_flow_group *fg;
 556         struct mlx5_flow_table *ft;
 557         struct mlx5_core_dev *dev;
 558
 559         fs_get_obj(fg, node);
 560         fs_get_obj(ft, fg->node.parent);
 561         dev = get_dev(&ft->node);
 562         trace_mlx5_fs_del_fg(fg);
 563
 564         root = find_root(&ft->node);
 565         if (fg->node.active && root->cmds->destroy_flow_group(dev, ft, fg->id))
 566                 mlx5_core_warn(dev, "flow steering can't destroy fg %d of ft %d\n",
 567                                fg->id, ft->id);
 568 }
 569
 570 static void del_sw_flow_group(struct fs_node *node)
 571 {
 572         struct mlx5_flow_steering *steering = get_steering(node);
 573         struct mlx5_flow_group *fg;
 574         struct mlx5_flow_table *ft;
 575         int err;
 576
 577         fs_get_obj(fg, node);
 578         fs_get_obj(ft, fg->node.parent);
 579
 580         rhashtable_destroy(&fg->ftes_hash);
 581         ida_destroy(&fg->fte_allocator);
 582         if (ft->autogroup.active)
 583                 ft->autogroup.num_groups--;
 584         err = rhltable_remove(&ft->fgs_hash,
 585                               &fg->hash,
 586                               rhash_fg);
 587         WARN_ON(err);
 588         kmem_cache_free(steering->fgs_cache, fg);
 589 }
 590
 591 static int insert_fte(struct mlx5_flow_group *fg, struct fs_fte *fte)
 592 {
 593         int index;
 594         int ret;
 595
 596         index = ida_simple_get(&fg->fte_allocator, 0, fg->max_ftes, GFP_KERNEL);
 597         if (index < 0)
 598                 return index;
 599
 600         fte->index = index + fg->start_index;
 601         ret = rhashtable_insert_fast(&fg->ftes_hash,
 602                                      &fte->hash,
 603                                      rhash_fte);
 604         if (ret)
 605                 goto err_ida_remove;
 606
 607         tree_add_node(&fte->node, &fg->node);
 608         list_add_tail(&fte->node.list, &fg->node.children);
 609         return 0;
 610
 611 err_ida_remove:
 612         ida_simple_remove(&fg->fte_allocator, index);
 613         return ret;
 614 }
 615
 616 static struct fs_fte *alloc_fte(struct mlx5_flow_table *ft,
 617                                 u32 *match_value,
 618                                 struct mlx5_flow_act *flow_act)
 619 {
 620         struct mlx5_flow_steering *steering = get_steering(&ft->node);
 621         struct fs_fte *fte;
 622
 623         fte = kmem_cache_zalloc(steering->ftes_cache, GFP_KERNEL);
 624         if (!fte)
 625                 return ERR_PTR(-ENOMEM);
 626
 627         memcpy(fte->val, match_value, sizeof(fte->val));
 628         fte->node.type =  FS_TYPE_FLOW_ENTRY;
 629         fte->action = *flow_act;
 630
 631         tree_init_node(&fte->node, del_hw_fte, del_sw_fte);
 632
 633         return fte;
 634 }
 635
 636 static void dealloc_flow_group(struct mlx5_flow_steering *steering,
 637                                struct mlx5_flow_group *fg)
 638 {
 639         rhashtable_destroy(&fg->ftes_hash);
 640         kmem_cache_free(steering->fgs_cache, fg);
 641 }
 642
 643 static struct mlx5_flow_group *alloc_flow_group(struct mlx5_flow_steering *steering,
 644                                                 u8 match_criteria_enable,
 645                                                 void *match_criteria,
 646                                                 int start_index,
 647                                                 int end_index)
 648 {
 649         struct mlx5_flow_group *fg;
 650         int ret;
 651
 652         fg = kmem_cache_zalloc(steering->fgs_cache, GFP_KERNEL);
 653         if (!fg)
 654                 return ERR_PTR(-ENOMEM);
 655
 656         ret = rhashtable_init(&fg->ftes_hash, &rhash_fte);
 657         if (ret) {
 658                 kmem_cache_free(steering->fgs_cache, fg);
 659                 return ERR_PTR(ret);
 660 }
 661         ida_init(&fg->fte_allocator);
 662         fg->mask.match_criteria_enable = match_criteria_enable;
 663         memcpy(&fg->mask.match_criteria, match_criteria,
 664                sizeof(fg->mask.match_criteria));
 665         fg->node.type =  FS_TYPE_FLOW_GROUP;
 666         fg->start_index = start_index;
 667         fg->max_ftes = end_index - start_index + 1;
 668
 669         return fg;
 670 }
 671
 672 static struct mlx5_flow_group *alloc_insert_flow_group(struct mlx5_flow_table *ft,
 673                                                        u8 match_criteria_enable,
 674                                                        void *match_criteria,
 675                                                        int start_index,
 676                                                        int end_index,
 677                                                        struct list_head *prev)
 678 {
 679         struct mlx5_flow_steering *steering = get_steering(&ft->node);
 680         struct mlx5_flow_group *fg;
 681         int ret;
 682
 683         fg = alloc_flow_group(steering, match_criteria_enable, match_criteria,
 684                               start_index, end_index);
 685         if (IS_ERR(fg))
 686                 return fg;
 687
 688         /* initialize refcnt, add to parent list */
 689         ret = rhltable_insert(&ft->fgs_hash,
 690                               &fg->hash,
 691                               rhash_fg);
 692         if (ret) {
 693                 dealloc_flow_group(steering, fg);
 694                 return ERR_PTR(ret);
 695         }
 696
 697         tree_init_node(&fg->node, del_hw_flow_group, del_sw_flow_group);
 698         tree_add_node(&fg->node, &ft->node);
 699         /* Add node to group list */
 700         list_add(&fg->node.list, prev);
 701         atomic_inc(&ft->node.version);
 702
 703         return fg;
 704 }
 705
 706 static struct mlx5_flow_table *alloc_flow_table(int level, u16 vport, int max_fte,
 707                                                 enum fs_flow_table_type table_type,
 708                                                 enum fs_flow_table_op_mod op_mod,
 709                                                 u32 flags)
 710 {
 711         struct mlx5_flow_table *ft;
 712         int ret;
 713
 714         ft  = kzalloc(sizeof(*ft), GFP_KERNEL);
 715         if (!ft)
 716                 return ERR_PTR(-ENOMEM);
 717
 718         ret = rhltable_init(&ft->fgs_hash, &rhash_fg);
 719         if (ret) {
 720                 kfree(ft);
 721                 return ERR_PTR(ret);
 722         }
 723
 724         ft->level = level;
 725         ft->node.type = FS_TYPE_FLOW_TABLE;
 726         ft->op_mod = op_mod;
 727         ft->type = table_type;
 728         ft->vport = vport;
 729         ft->max_fte = max_fte;
 730         ft->flags = flags;
 731         INIT_LIST_HEAD(&ft->fwd_rules);
 732         mutex_init(&ft->lock);
 733
 734         return ft;
 735 }
 736
 737 /* If reverse is false, then we search for the first flow table in the
 738  * root sub-tree from start(closest from right), else we search for the
 739  * last flow table in the root sub-tree till start(closest from left).
 740  */
 741 static struct mlx5_flow_table *find_closest_ft_recursive(struct fs_node  *root,
 742                                                          struct list_head *start,
 743                                                          bool reverse)
 744 {
 745 #define list_advance_entry(pos, reverse)                \
 746         ((reverse) ? list_prev_entry(pos, list) : list_next_entry(pos, list))
 747
 748 #define list_for_each_advance_continue(pos, head, reverse)      \
 749         for (pos = list_advance_entry(pos, reverse);            \
 750              &pos->list != (head);                              \
 751              pos = list_advance_entry(pos, reverse))
 752
 753         struct fs_node *iter = list_entry(start, struct fs_node, list);
 754         struct mlx5_flow_table *ft = NULL;
 755
 756         if (!root)
 757                 return NULL;
 758
 759         list_for_each_advance_continue(iter, &root->children, reverse) {
 760                 if (iter->type == FS_TYPE_FLOW_TABLE) {
 761                         fs_get_obj(ft, iter);
 762                         return ft;
 763                 }
 764                 ft = find_closest_ft_recursive(iter, &iter->children, reverse);
 765                 if (ft)
 766                         return ft;
 767         }
 768
 769         return ft;
 770 }
 771
 772 /* If reverse if false then return the first flow table in next priority of
 773  * prio in the tree, else return the last flow table in the previous priority
 774  * of prio in the tree.
 775  */
 776 static struct mlx5_flow_table *find_closest_ft(struct fs_prio *prio, bool reverse)
 777 {
 778         struct mlx5_flow_table *ft = NULL;
 779         struct fs_node *curr_node;
 780         struct fs_node *parent;
 781
 782         parent = prio->node.parent;
 783         curr_node = &prio->node;
 784         while (!ft && parent) {
 785                 ft = find_closest_ft_recursive(parent, &curr_node->list, reverse);
 786                 curr_node = parent;
 787                 parent = curr_node->parent;
 788         }
 789         return ft;
 790 }
 791
 792 /* Assuming all the tree is locked by mutex chain lock */
 793 static struct mlx5_flow_table *find_next_chained_ft(struct fs_prio *prio)
 794 {
 795         return find_closest_ft(prio, false);
 796 }
 797
 798 /* Assuming all the tree is locked by mutex chain lock */
 799 static struct mlx5_flow_table *find_prev_chained_ft(struct fs_prio *prio)
 800 {
 801         return find_closest_ft(prio, true);
 802 }
 803
 804 static int connect_fts_in_prio(struct mlx5_core_dev *dev,
 805                                struct fs_prio *prio,
 806                                struct mlx5_flow_table *ft)
 807 {
 808         struct mlx5_flow_root_namespace *root = find_root(&prio->node);
 809         struct mlx5_flow_table *iter;
 810         int i = 0;
 811         int err;
 812
 813         fs_for_each_ft(iter, prio) {
 814                 i++;
 815                 err = root->cmds->modify_flow_table(dev, iter, ft);
 816                 if (err) {
 817                         mlx5_core_warn(dev, "Failed to modify flow table %d\n",
 818                                        iter->id);
 819                         /* The driver is out of sync with the FW */
 820                         if (i > 1)
 821                                 WARN_ON(true);
 822                         return err;
 823                 }
 824         }
 825         return 0;
 826 }
 827
 828 /* Connect flow tables from previous priority of prio to ft */
 829 static int connect_prev_fts(struct mlx5_core_dev *dev,
 830                             struct mlx5_flow_table *ft,
 831                             struct fs_prio *prio)
 832 {
 833         struct mlx5_flow_table *prev_ft;
 834
 835         prev_ft = find_prev_chained_ft(prio);
 836         if (prev_ft) {
 837                 struct fs_prio *prev_prio;
 838
 839                 fs_get_obj(prev_prio, prev_ft->node.parent);
 840                 return connect_fts_in_prio(dev, prev_prio, ft);
 841         }
 842         return 0;
 843 }
 844
 845 static int update_root_ft_create(struct mlx5_flow_table *ft, struct fs_prio
 846                                  *prio)
 847 {
 848         struct mlx5_flow_root_namespace *root = find_root(&prio->node);
 849         struct mlx5_ft_underlay_qp *uqp;
 850         int min_level = INT_MAX;
 851         int err;
 852         u32 qpn;
 853
 854         if (root->root_ft)
 855                 min_level = root->root_ft->level;
 856
 857         if (ft->level >= min_level)
 858                 return 0;
 859
 860         if (list_empty(&root->underlay_qpns)) {
 861                 /* Don't set any QPN (zero) in case QPN list is empty */
 862                 qpn = 0;
 863                 err = root->cmds->update_root_ft(root->dev, ft, qpn, false);
 864         } else {
 865                 list_for_each_entry(uqp, &root->underlay_qpns, list) {
 866                         qpn = uqp->qpn;
 867                         err = root->cmds->update_root_ft(root->dev, ft,
 868                                                          qpn, false);
 869                         if (err)
 870                                 break;
 871                 }
 872         }
 873
 874         if (err)
 875                 mlx5_core_warn(root->dev,
 876                                "Update root flow table of id(%u) qpn(%d) failed\n",
 877                                ft->id, qpn);
 878         else
 879                 root->root_ft = ft;
 880
 881         return err;
 882 }
 883
 884 static int _mlx5_modify_rule_destination(struct mlx5_flow_rule *rule,
 885                                          struct mlx5_flow_destination *dest)
 886 {
 887         struct mlx5_flow_root_namespace *root;
 888         struct mlx5_flow_table *ft;
 889         struct mlx5_flow_group *fg;
 890         struct fs_fte *fte;
 891         int modify_mask = BIT(MLX5_SET_FTE_MODIFY_ENABLE_MASK_DESTINATION_LIST);
 892         int err = 0;
 893
 894         fs_get_obj(fte, rule->node.parent);
 895         if (!(fte->action.action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST))
 896                 return -EINVAL;
 897         down_write_ref_node(&fte->node);
 898         fs_get_obj(fg, fte->node.parent);
 899         fs_get_obj(ft, fg->node.parent);
 900
 901         memcpy(&rule->dest_attr, dest, sizeof(*dest));
 902         root = find_root(&ft->node);
 903         err = root->cmds->update_fte(get_dev(&ft->node), ft, fg->id,
 904                                      modify_mask, fte);
 905         up_write_ref_node(&fte->node);
 906
 907         return err;
 908 }
 909
 910 int mlx5_modify_rule_destination(struct mlx5_flow_handle *handle,
 911                                  struct mlx5_flow_destination *new_dest,
 912                                  struct mlx5_flow_destination *old_dest)
 913 {
 914         int i;
 915
 916         if (!old_dest) {
 917                 if (handle->num_rules != 1)
 918                         return -EINVAL;
 919                 return _mlx5_modify_rule_destination(handle->rule[0],
 920                                                      new_dest);
 921         }
 922
 923         for (i = 0; i < handle->num_rules; i++) {
 924                 if (mlx5_flow_dests_cmp(new_dest, &handle->rule[i]->dest_attr))
 925                         return _mlx5_modify_rule_destination(handle->rule[i],
 926                                                              new_dest);
 927         }
 928
 929         return -EINVAL;
 930 }
 931
 932 /* Modify/set FWD rules that point on old_next_ft to point on new_next_ft  */
 933 static int connect_fwd_rules(struct mlx5_core_dev *dev,
 934                              struct mlx5_flow_table *new_next_ft,
 935                              struct mlx5_flow_table *old_next_ft)
 936 {
 937         struct mlx5_flow_destination dest = {};
 938         struct mlx5_flow_rule *iter;
 939         int err = 0;
 940
 941         /* new_next_ft and old_next_ft could be NULL only
 942          * when we create/destroy the anchor flow table.
 943          */
 944         if (!new_next_ft || !old_next_ft)
 945                 return 0;
 946
 947         dest.type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE;
 948         dest.ft = new_next_ft;
 949
 950         mutex_lock(&old_next_ft->lock);
 951         list_splice_init(&old_next_ft->fwd_rules, &new_next_ft->fwd_rules);
 952         mutex_unlock(&old_next_ft->lock);
 953         list_for_each_entry(iter, &new_next_ft->fwd_rules, next_ft) {
 954                 err = _mlx5_modify_rule_destination(iter, &dest);
 955                 if (err)
 956                         pr_err("mlx5_core: failed to modify rule to point on flow table %d\n",
 957                                new_next_ft->id);
 958         }
 959         return 0;
 960 }
 961
 962 static int connect_flow_table(struct mlx5_core_dev *dev, struct mlx5_flow_table *ft,
 963                               struct fs_prio *prio)
 964 {
 965         struct mlx5_flow_table *next_ft;
 966         int err = 0;
 967
 968         /* Connect_prev_fts and update_root_ft_create are mutually exclusive */
 969
 970         if (list_empty(&prio->node.children)) {
 971                 err = connect_prev_fts(dev, ft, prio);
 972                 if (err)
 973                         return err;
 974
 975                 next_ft = find_next_chained_ft(prio);
 976                 err = connect_fwd_rules(dev, ft, next_ft);
 977                 if (err)
 978                         return err;
 979         }
 980
 981         if (MLX5_CAP_FLOWTABLE(dev,
 982                                flow_table_properties_nic_receive.modify_root))
 983                 err = update_root_ft_create(ft, prio);
 984         return err;
 985 }
 986
 987 static void list_add_flow_table(struct mlx5_flow_table *ft,
 988                                 struct fs_prio *prio)
 989 {
 990         struct list_head *prev = &prio->node.children;
 991         struct mlx5_flow_table *iter;
 992
 993         fs_for_each_ft(iter, prio) {
 994                 if (iter->level > ft->level)
 995                         break;
 996                 prev = &iter->node.list;
 997         }
 998         list_add(&ft->node.list, prev);
 999 }
1000
1001 static struct mlx5_flow_table *__mlx5_create_flow_table(struct mlx5_flow_namespace *ns,
1002                                                         struct mlx5_flow_table_attr *ft_attr,
1003                                                         enum fs_flow_table_op_mod op_mod,
1004                                                         u16 vport)
1005 {
1006         struct mlx5_flow_root_namespace *root = find_root(&ns->node);
1007         struct mlx5_flow_table *next_ft = NULL;
1008         struct fs_prio *fs_prio = NULL;
1009         struct mlx5_flow_table *ft;
1010         int log_table_sz;
1011         int err;
1012
1013         if (!root) {
1014                 pr_err("mlx5: flow steering failed to find root of namespace\n");
1015                 return ERR_PTR(-ENODEV);
1016         }
1017
1018         mutex_lock(&root->chain_lock);
1019         fs_prio = find_prio(ns, ft_attr->prio);
1020         if (!fs_prio) {
1021                 err = -EINVAL;
1022                 goto unlock_root;
1023         }
1024         if (ft_attr->level >= fs_prio->num_levels) {
1025                 err = -ENOSPC;
1026                 goto unlock_root;
1027         }
1028         /* The level is related to the
1029          * priority level range.
1030          */
1031         ft_attr->level += fs_prio->start_level;
1032         ft = alloc_flow_table(ft_attr->level,
1033                               vport,
1034                               ft_attr->max_fte ? roundup_pow_of_two(ft_attr->max_fte) : 0,
1035                               root->table_type,
1036                               op_mod, ft_attr->flags);
1037         if (IS_ERR(ft)) {
1038                 err = PTR_ERR(ft);
1039                 goto unlock_root;
1040         }
1041
1042         tree_init_node(&ft->node, del_hw_flow_table, del_sw_flow_table);
1043         log_table_sz = ft->max_fte ? ilog2(ft->max_fte) : 0;
1044         next_ft = find_next_chained_ft(fs_prio);
1045         err = root->cmds->create_flow_table(root->dev, ft->vport, ft->op_mod,
1046                                             ft->type, ft->level, log_table_sz,
1047                                             next_ft, &ft->id, ft->flags);
1048         if (err)
1049                 goto free_ft;
1050
1051         err = connect_flow_table(root->dev, ft, fs_prio);
1052         if (err)
1053                 goto destroy_ft;
1054         ft->node.active = true;
1055         down_write_ref_node(&fs_prio->node);
1056         tree_add_node(&ft->node, &fs_prio->node);
1057         list_add_flow_table(ft, fs_prio);
1058         fs_prio->num_ft++;
1059         up_write_ref_node(&fs_prio->node);
1060         mutex_unlock(&root->chain_lock);
1061         return ft;
1062 destroy_ft:
1063         root->cmds->destroy_flow_table(root->dev, ft);
1064 free_ft:
1065         kfree(ft);
1066 unlock_root:
1067         mutex_unlock(&root->chain_lock);
1068         return ERR_PTR(err);
1069 }
1070
1071 struct mlx5_flow_table *mlx5_create_flow_table(struct mlx5_flow_namespace *ns,
1072                                                struct mlx5_flow_table_attr *ft_attr)
1073 {
1074         return __mlx5_create_flow_table(ns, ft_attr, FS_FT_OP_MOD_NORMAL, 0);
1075 }
1076
1077 struct mlx5_flow_table *mlx5_create_vport_flow_table(struct mlx5_flow_namespace *ns,
1078                                                      int prio, int max_fte,
1079                                                      u32 level, u16 vport)
1080 {
1081         struct mlx5_flow_table_attr ft_attr = {};
1082
1083         ft_attr.max_fte = max_fte;
1084         ft_attr.level   = level;
1085         ft_attr.prio    = prio;
1086
1087         return __mlx5_create_flow_table(ns, &ft_attr, FS_FT_OP_MOD_NORMAL, vport);
1088 }
1089
1090 struct mlx5_flow_table*
1091 mlx5_create_lag_demux_flow_table(struct mlx5_flow_namespace *ns,
1092                                  int prio, u32 level)
1093 {
1094         struct mlx5_flow_table_attr ft_attr = {};
1095
1096         ft_attr.level = level;
1097         ft_attr.prio  = prio;
1098         return __mlx5_create_flow_table(ns, &ft_attr, FS_FT_OP_MOD_LAG_DEMUX, 0);
1099 }
1100 EXPORT_SYMBOL(mlx5_create_lag_demux_flow_table);
1101
1102 struct mlx5_flow_table*
1103 mlx5_create_auto_grouped_flow_table(struct mlx5_flow_namespace *ns,
1104                                     int prio,
1105                                     int num_flow_table_entries,
1106                                     int max_num_groups,
1107                                     u32 level,
1108                                     u32 flags)
1109 {
1110         struct mlx5_flow_table_attr ft_attr = {};
1111         struct mlx5_flow_table *ft;
1112
1113         if (max_num_groups > num_flow_table_entries)
1114                 return ERR_PTR(-EINVAL);
1115
1116         ft_attr.max_fte = num_flow_table_entries;
1117         ft_attr.prio    = prio;
1118         ft_attr.level   = level;
1119         ft_attr.flags   = flags;
1120
1121         ft = mlx5_create_flow_table(ns, &ft_attr);
1122         if (IS_ERR(ft))
1123                 return ft;
1124
1125         ft->autogroup.active = true;
1126         ft->autogroup.required_groups = max_num_groups;
1127
1128         return ft;
1129 }
1130 EXPORT_SYMBOL(mlx5_create_auto_grouped_flow_table);
1131
1132 struct mlx5_flow_group *mlx5_create_flow_group(struct mlx5_flow_table *ft,
1133                                                u32 *fg_in)
1134 {
1135         struct mlx5_flow_root_namespace *root = find_root(&ft->node);
1136         void *match_criteria = MLX5_ADDR_OF(create_flow_group_in,
1137                                             fg_in, match_criteria);
1138         u8 match_criteria_enable = MLX5_GET(create_flow_group_in,
1139                                             fg_in,
1140                                             match_criteria_enable);
1141         int start_index = MLX5_GET(create_flow_group_in, fg_in,
1142                                    start_flow_index);
1143         int end_index = MLX5_GET(create_flow_group_in, fg_in,
1144                                  end_flow_index);
1145         struct mlx5_core_dev *dev = get_dev(&ft->node);
1146         struct mlx5_flow_group *fg;
1147         int err;
1148
1149         if (!check_valid_mask(match_criteria_enable, match_criteria))
1150                 return ERR_PTR(-EINVAL);
1151
1152         if (ft->autogroup.active)
1153                 return ERR_PTR(-EPERM);
1154
1155         down_write_ref_node(&ft->node);
1156         fg = alloc_insert_flow_group(ft, match_criteria_enable, match_criteria,
1157                                      start_index, end_index,
1158                                      ft->node.children.prev);
1159         up_write_ref_node(&ft->node);
1160         if (IS_ERR(fg))
1161                 return fg;
1162
1163         err = root->cmds->create_flow_group(dev, ft, fg_in, &fg->id);
1164         if (err) {
1165                 tree_put_node(&fg->node);
1166                 return ERR_PTR(err);
1167         }
1168         trace_mlx5_fs_add_fg(fg);
1169         fg->node.active = true;
1170
1171         return fg;
1172 }
1173
1174 static struct mlx5_flow_rule *alloc_rule(struct mlx5_flow_destination *dest)
1175 {
1176         struct mlx5_flow_rule *rule;
1177
1178         rule = kzalloc(sizeof(*rule), GFP_KERNEL);
1179         if (!rule)
1180                 return NULL;
1181
1182         INIT_LIST_HEAD(&rule->next_ft);
1183         rule->node.type = FS_TYPE_FLOW_DEST;
1184         if (dest)
1185                 memcpy(&rule->dest_attr, dest, sizeof(*dest));
1186
1187         return rule;
1188 }
1189
1190 static struct mlx5_flow_handle *alloc_handle(int num_rules)
1191 {
1192         struct mlx5_flow_handle *handle;
1193
1194         handle = kzalloc(sizeof(*handle) + sizeof(handle->rule[0]) *
1195                           num_rules, GFP_KERNEL);
1196         if (!handle)
1197                 return NULL;
1198
1199         handle->num_rules = num_rules;
1200
1201         return handle;
1202 }
1203
1204 static void destroy_flow_handle(struct fs_fte *fte,
1205                                 struct mlx5_flow_handle *handle,
1206                                 struct mlx5_flow_destination *dest,
1207                                 int i)
1208 {
1209         for (; --i >= 0;) {
1210                 if (refcount_dec_and_test(&handle->rule[i]->node.refcount)) {
1211                         fte->dests_size--;
1212                         list_del(&handle->rule[i]->node.list);
1213                         kfree(handle->rule[i]);
1214                 }
1215         }
1216         kfree(handle);
1217 }
1218
1219 static struct mlx5_flow_handle *
1220 create_flow_handle(struct fs_fte *fte,
1221                    struct mlx5_flow_destination *dest,
1222                    int dest_num,
1223                    int *modify_mask,
1224                    bool *new_rule)
1225 {
1226         struct mlx5_flow_handle *handle;
1227         struct mlx5_flow_rule *rule = NULL;
1228         static int count = BIT(MLX5_SET_FTE_MODIFY_ENABLE_MASK_FLOW_COUNTERS);
1229         static int dst = BIT(MLX5_SET_FTE_MODIFY_ENABLE_MASK_DESTINATION_LIST);
1230         int type;
1231         int i = 0;
1232
1233         handle = alloc_handle((dest_num) ? dest_num : 1);
1234         if (!handle)
1235                 return ERR_PTR(-ENOMEM);
1236
1237         do {
1238                 if (dest) {
1239                         rule = find_flow_rule(fte, dest + i);
1240                         if (rule) {
1241                                 refcount_inc(&rule->node.refcount);
1242                                 goto rule_found;
1243                         }
1244                 }
1245
1246                 *new_rule = true;
1247                 rule = alloc_rule(dest + i);
1248                 if (!rule)
1249                         goto free_rules;
1250
1251                 /* Add dest to dests list- we need flow tables to be in the
1252                  * end of the list for forward to next prio rules.
1253                  */
1254                 tree_init_node(&rule->node, NULL, del_sw_hw_rule);
1255                 if (dest &&
1256                     dest[i].type != MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE)
1257                         list_add(&rule->node.list, &fte->node.children);
1258                 else
1259                         list_add_tail(&rule->node.list, &fte->node.children);
1260                 if (dest) {
1261                         fte->dests_size++;
1262
1263                         type = dest[i].type ==
1264                                 MLX5_FLOW_DESTINATION_TYPE_COUNTER;
1265                         *modify_mask |= type ? count : dst;
1266                 }
1267 rule_found:
1268                 handle->rule[i] = rule;
1269         } while (++i < dest_num);
1270
1271         return handle;
1272
1273 free_rules:
1274         destroy_flow_handle(fte, handle, dest, i);
1275         return ERR_PTR(-ENOMEM);
1276 }
1277
1278 /* fte should not be deleted while calling this function */
1279 static struct mlx5_flow_handle *
1280 add_rule_fte(struct fs_fte *fte,
1281              struct mlx5_flow_group *fg,
1282              struct mlx5_flow_destination *dest,
1283              int dest_num,
1284              bool update_action)
1285 {
1286         struct mlx5_flow_root_namespace *root;
1287         struct mlx5_flow_handle *handle;
1288         struct mlx5_flow_table *ft;
1289         int modify_mask = 0;
1290         int err;
1291         bool new_rule = false;
1292
1293         handle = create_flow_handle(fte, dest, dest_num, &modify_mask,
1294                                     &new_rule);
1295         if (IS_ERR(handle) || !new_rule)
1296                 goto out;
1297
1298         if (update_action)
1299                 modify_mask |= BIT(MLX5_SET_FTE_MODIFY_ENABLE_MASK_ACTION);
1300
1301         fs_get_obj(ft, fg->node.parent);
1302         root = find_root(&fg->node);
1303         if (!(fte->status & FS_FTE_STATUS_EXISTING))
1304                 err = root->cmds->create_fte(get_dev(&ft->node),
1305                                              ft, fg, fte);
1306         else
1307                 err = root->cmds->update_fte(get_dev(&ft->node), ft, fg->id,
1308                                                      modify_mask, fte);
1309         if (err)
1310                 goto free_handle;
1311
1312         fte->node.active = true;
1313         fte->status |= FS_FTE_STATUS_EXISTING;
1314         atomic_inc(&fte->node.version);
1315
1316 out:
1317         return handle;
1318
1319 free_handle:
1320         destroy_flow_handle(fte, handle, dest, handle->num_rules);
1321         return ERR_PTR(err);
1322 }
1323
1324 static struct mlx5_flow_group *alloc_auto_flow_group(struct mlx5_flow_table  *ft,
1325                                                      struct mlx5_flow_spec *spec)
1326 {
1327         struct list_head *prev = &ft->node.children;
1328         struct mlx5_flow_group *fg;
1329         unsigned int candidate_index = 0;
1330         unsigned int group_size = 0;
1331
1332         if (!ft->autogroup.active)
1333                 return ERR_PTR(-ENOENT);
1334
1335         if (ft->autogroup.num_groups < ft->autogroup.required_groups)
1336                 /* We save place for flow groups in addition to max types */
1337                 group_size = ft->max_fte / (ft->autogroup.required_groups + 1);
1338
1339         /*  ft->max_fte == ft->autogroup.max_types */
1340         if (group_size == 0)
1341                 group_size = 1;
1342
1343         /* sorted by start_index */
1344         fs_for_each_fg(fg, ft) {
1345                 if (candidate_index + group_size > fg->start_index)
1346                         candidate_index = fg->start_index + fg->max_ftes;
1347                 else
1348                         break;
1349                 prev = &fg->node.list;
1350         }
1351
1352         if (candidate_index + group_size > ft->max_fte)
1353                 return ERR_PTR(-ENOSPC);
1354
1355         fg = alloc_insert_flow_group(ft,
1356                                      spec->match_criteria_enable,
1357                                      spec->match_criteria,
1358                                      candidate_index,
1359                                      candidate_index + group_size - 1,
1360                                      prev);
1361         if (IS_ERR(fg))
1362                 goto out;
1363
1364         ft->autogroup.num_groups++;
1365
1366 out:
1367         return fg;
1368 }
1369
1370 static int create_auto_flow_group(struct mlx5_flow_table *ft,
1371                                   struct mlx5_flow_group *fg)
1372 {
1373         struct mlx5_flow_root_namespace *root = find_root(&ft->node);
1374         struct mlx5_core_dev *dev = get_dev(&ft->node);
1375         int inlen = MLX5_ST_SZ_BYTES(create_flow_group_in);
1376         void *match_criteria_addr;
1377         int err;
1378         u32 *in;
1379
1380         in = kvzalloc(inlen, GFP_KERNEL);
1381         if (!in)
1382                 return -ENOMEM;
1383
1384         MLX5_SET(create_flow_group_in, in, match_criteria_enable,
1385                  fg->mask.match_criteria_enable);
1386         MLX5_SET(create_flow_group_in, in, start_flow_index, fg->start_index);
1387         MLX5_SET(create_flow_group_in, in, end_flow_index,   fg->start_index +
1388                  fg->max_ftes - 1);
1389         match_criteria_addr = MLX5_ADDR_OF(create_flow_group_in,
1390                                            in, match_criteria);
1391         memcpy(match_criteria_addr, fg->mask.match_criteria,
1392                sizeof(fg->mask.match_criteria));
1393
1394         err = root->cmds->create_flow_group(dev, ft, in, &fg->id);
1395         if (!err) {
1396                 fg->node.active = true;
1397                 trace_mlx5_fs_add_fg(fg);
1398         }
1399
1400         kvfree(in);
1401         return err;
1402 }
1403
1404 static bool mlx5_flow_dests_cmp(struct mlx5_flow_destination *d1,
1405                                 struct mlx5_flow_destination *d2)
1406 {
1407         if (d1->type == d2->type) {
1408                 if ((d1->type == MLX5_FLOW_DESTINATION_TYPE_VPORT &&
1409                      d1->vport_num == d2->vport_num) ||
1410                     (d1->type == MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE &&
1411                      d1->ft == d2->ft) ||
1412                     (d1->type == MLX5_FLOW_DESTINATION_TYPE_TIR &&
1413                      d1->tir_num == d2->tir_num))
1414                         return true;
1415         }
1416
1417         return false;
1418 }
1419
1420 static struct mlx5_flow_rule *find_flow_rule(struct fs_fte *fte,
1421                                              struct mlx5_flow_destination *dest)
1422 {
1423         struct mlx5_flow_rule *rule;
1424
1425         list_for_each_entry(rule, &fte->node.children, node.list) {
1426                 if (mlx5_flow_dests_cmp(&rule->dest_attr, dest))
1427                         return rule;
1428         }
1429         return NULL;
1430 }
1431
1432 static bool check_conflicting_actions(u32 action1, u32 action2)
1433 {
1434         u32 xored_actions = action1 ^ action2;
1435
1436         /* if one rule only wants to count, it's ok */
1437         if (action1 == MLX5_FLOW_CONTEXT_ACTION_COUNT ||
1438             action2 == MLX5_FLOW_CONTEXT_ACTION_COUNT)
1439                 return false;
1440
1441         if (xored_actions & (MLX5_FLOW_CONTEXT_ACTION_DROP  |
1442                              MLX5_FLOW_CONTEXT_ACTION_ENCAP |
1443                              MLX5_FLOW_CONTEXT_ACTION_DECAP |
1444                              MLX5_FLOW_CONTEXT_ACTION_MOD_HDR  |
1445                              MLX5_FLOW_CONTEXT_ACTION_VLAN_POP |
1446                              MLX5_FLOW_CONTEXT_ACTION_VLAN_PUSH))
1447                 return true;
1448
1449         return false;
1450 }
1451
1452 static int check_conflicting_ftes(struct fs_fte *fte, const struct mlx5_flow_act *flow_act)
1453 {
1454         if (check_conflicting_actions(flow_act->action, fte->action.action)) {
1455                 mlx5_core_warn(get_dev(&fte->node),
1456                                "Found two FTEs with conflicting actions\n");
1457                 return -EEXIST;
1458         }
1459
1460         if (flow_act->has_flow_tag &&
1461             fte->action.flow_tag != flow_act->flow_tag) {
1462                 mlx5_core_warn(get_dev(&fte->node),
1463                                "FTE flow tag %u already exists with different flow tag %u\n",
1464                                fte->action.flow_tag,
1465                                flow_act->flow_tag);
1466                 return -EEXIST;
1467         }
1468
1469         return 0;
1470 }
1471
1472 static struct mlx5_flow_handle *add_rule_fg(struct mlx5_flow_group *fg,
1473                                             u32 *match_value,
1474                                             struct mlx5_flow_act *flow_act,
1475                                             struct mlx5_flow_destination *dest,
1476                                             int dest_num,
1477                                             struct fs_fte *fte)
1478 {
1479         struct mlx5_flow_handle *handle;
1480         int old_action;
1481         int i;
1482         int ret;
1483
1484         ret = check_conflicting_ftes(fte, flow_act);
1485         if (ret)
1486                 return ERR_PTR(ret);
1487
1488         old_action = fte->action.action;
1489         fte->action.action |= flow_act->action;
1490         handle = add_rule_fte(fte, fg, dest, dest_num,
1491                               old_action != flow_act->action);
1492         if (IS_ERR(handle)) {
1493                 fte->action.action = old_action;
1494                 return handle;
1495         }
1496         trace_mlx5_fs_set_fte(fte, false);
1497
1498         for (i = 0; i < handle->num_rules; i++) {
1499                 if (refcount_read(&handle->rule[i]->node.refcount) == 1) {
1500                         tree_add_node(&handle->rule[i]->node, &fte->node);
1501                         trace_mlx5_fs_add_rule(handle->rule[i]);
1502                 }
1503         }
1504         return handle;
1505 }
1506
1507 struct mlx5_fc *mlx5_flow_rule_counter(struct mlx5_flow_handle *handle)
1508 {
1509         struct mlx5_flow_rule *dst;
1510         struct fs_fte *fte;
1511
1512         fs_get_obj(fte, handle->rule[0]->node.parent);
1513
1514         fs_for_each_dst(dst, fte) {
1515                 if (dst->dest_attr.type == MLX5_FLOW_DESTINATION_TYPE_COUNTER)
1516                         return dst->dest_attr.counter;
1517         }
1518
1519         return NULL;
1520 }
1521
1522 static bool counter_is_valid(struct mlx5_fc *counter, u32 action)
1523 {
1524         if (!(action & MLX5_FLOW_CONTEXT_ACTION_COUNT))
1525                 return !counter;
1526
1527         if (!counter)
1528                 return false;
1529
1530         return (action & (MLX5_FLOW_CONTEXT_ACTION_DROP |
1531                           MLX5_FLOW_CONTEXT_ACTION_FWD_DEST));
1532 }
1533
1534 static bool dest_is_valid(struct mlx5_flow_destination *dest,
1535                           u32 action,
1536                           struct mlx5_flow_table *ft)
1537 {
1538         if (dest && (dest->type == MLX5_FLOW_DESTINATION_TYPE_COUNTER))
1539                 return counter_is_valid(dest->counter, action);
1540
1541         if (!(action & MLX5_FLOW_CONTEXT_ACTION_FWD_DEST))
1542                 return true;
1543
1544         if (!dest || ((dest->type ==
1545             MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE) &&
1546             (dest->ft->level <= ft->level)))
1547                 return false;
1548         return true;
1549 }
1550
1551 struct match_list {
1552         struct list_head        list;
1553         struct mlx5_flow_group *g;
1554 };
1555
1556 struct match_list_head {
1557         struct list_head  list;
1558         struct match_list first;
1559 };
1560
1561 static void free_match_list(struct match_list_head *head)
1562 {
1563         if (!list_empty(&head->list)) {
1564                 struct match_list *iter, *match_tmp;
1565
1566                 list_del(&head->first.list);
1567                 tree_put_node(&head->first.g->node);
1568                 list_for_each_entry_safe(iter, match_tmp, &head->list,
1569                                          list) {
1570                         tree_put_node(&iter->g->node);
1571                         list_del(&iter->list);
1572                         kfree(iter);
1573                 }
1574         }
1575 }
1576
1577 static int build_match_list(struct match_list_head *match_head,
1578                             struct mlx5_flow_table *ft,
1579                             struct mlx5_flow_spec *spec)
1580 {
1581         struct rhlist_head *tmp, *list;
1582         struct mlx5_flow_group *g;
1583         int err = 0;
1584
1585         rcu_read_lock();
1586         INIT_LIST_HEAD(&match_head->list);
1587         /* Collect all fgs which has a matching match_criteria */
1588         list = rhltable_lookup(&ft->fgs_hash, spec, rhash_fg);
1589         /* RCU is atomic, we can't execute FW commands here */
1590         rhl_for_each_entry_rcu(g, tmp, list, hash) {
1591                 struct match_list *curr_match;
1592
1593                 if (likely(list_empty(&match_head->list))) {
1594                         if (!tree_get_node(&g->node))
1595                                 continue;
1596                         match_head->first.g = g;
1597                         list_add_tail(&match_head->first.list,
1598                                       &match_head->list);
1599                         continue;
1600                 }
1601
1602                 curr_match = kmalloc(sizeof(*curr_match), GFP_ATOMIC);
1603                 if (!curr_match) {
1604                         free_match_list(match_head);
1605                         err = -ENOMEM;
1606                         goto out;
1607                 }
1608                 if (!tree_get_node(&g->node)) {
1609                         kfree(curr_match);
1610                         continue;
1611                 }
1612                 curr_match->g = g;
1613                 list_add_tail(&curr_match->list, &match_head->list);
1614         }
1615 out:
1616         rcu_read_unlock();
1617         return err;
1618 }
1619
1620 static u64 matched_fgs_get_version(struct list_head *match_head)
1621 {
1622         struct match_list *iter;
1623         u64 version = 0;
1624
1625         list_for_each_entry(iter, match_head, list)
1626                 version += (u64)atomic_read(&iter->g->node.version);
1627         return version;
1628 }
1629
1630 static struct mlx5_flow_handle *
1631 try_add_to_existing_fg(struct mlx5_flow_table *ft,
1632                        struct list_head *match_head,
1633                        struct mlx5_flow_spec *spec,
1634                        struct mlx5_flow_act *flow_act,
1635                        struct mlx5_flow_destination *dest,
1636                        int dest_num,
1637                        int ft_version)
1638 {
1639         struct mlx5_flow_steering *steering = get_steering(&ft->node);
1640         struct mlx5_flow_group *g;
1641         struct mlx5_flow_handle *rule;
1642         struct match_list *iter;
1643         bool take_write = false;
1644         struct fs_fte *fte;
1645         u64  version;
1646         int err;
1647
1648         fte = alloc_fte(ft, spec->match_value, flow_act);
1649         if (IS_ERR(fte))
1650                 return  ERR_PTR(-ENOMEM);
1651
1652         list_for_each_entry(iter, match_head, list) {
1653                 nested_down_read_ref_node(&iter->g->node, FS_LOCK_PARENT);
1654         }
1655
1656 search_again_locked:
1657         version = matched_fgs_get_version(match_head);
1658         /* Try to find a fg that already contains a matching fte */
1659         list_for_each_entry(iter, match_head, list) {
1660                 struct fs_fte *fte_tmp;
1661
1662                 g = iter->g;
1663                 fte_tmp = rhashtable_lookup_fast(&g->ftes_hash, spec->match_value,
1664                                                  rhash_fte);
1665                 if (!fte_tmp || !tree_get_node(&fte_tmp->node))
1666                         continue;
1667
1668                 nested_down_write_ref_node(&fte_tmp->node, FS_LOCK_CHILD);
1669                 if (!take_write) {
1670                         list_for_each_entry(iter, match_head, list)
1671                                 up_read_ref_node(&iter->g->node);
1672                 } else {
1673                         list_for_each_entry(iter, match_head, list)
1674                                 up_write_ref_node(&iter->g->node);
1675                 }
1676
1677                 rule = add_rule_fg(g, spec->match_value,
1678                                    flow_act, dest, dest_num, fte_tmp);
1679                 up_write_ref_node(&fte_tmp->node);
1680                 tree_put_node(&fte_tmp->node);
1681                 kmem_cache_free(steering->ftes_cache, fte);
1682                 return rule;
1683         }
1684
1685         /* No group with matching fte found. Try to add a new fte to any
1686          * matching fg.
1687          */
1688
1689         if (!take_write) {
1690                 list_for_each_entry(iter, match_head, list)
1691                         up_read_ref_node(&iter->g->node);
1692                 list_for_each_entry(iter, match_head, list)
1693                         nested_down_write_ref_node(&iter->g->node,
1694                                                    FS_LOCK_PARENT);
1695                 take_write = true;
1696         }
1697
1698         /* Check the ft version, for case that new flow group
1699          * was added while the fgs weren't locked
1700          */
1701         if (atomic_read(&ft->node.version) != ft_version) {
1702                 rule = ERR_PTR(-EAGAIN);
1703                 goto out;
1704         }
1705
1706         /* Check the fgs version, for case the new FTE with the
1707          * same values was added while the fgs weren't locked
1708          */
1709         if (version != matched_fgs_get_version(match_head))
1710                 goto search_again_locked;
1711
1712         list_for_each_entry(iter, match_head, list) {
1713                 g = iter->g;
1714
1715                 if (!g->node.active)
1716                         continue;
1717                 err = insert_fte(g, fte);
1718                 if (err) {
1719                         if (err == -ENOSPC)
1720                                 continue;
1721                         list_for_each_entry(iter, match_head, list)
1722                                 up_write_ref_node(&iter->g->node);
1723                         kmem_cache_free(steering->ftes_cache, fte);
1724                         return ERR_PTR(err);
1725                 }
1726
1727                 nested_down_write_ref_node(&fte->node, FS_LOCK_CHILD);
1728                 list_for_each_entry(iter, match_head, list)
1729                         up_write_ref_node(&iter->g->node);
1730                 rule = add_rule_fg(g, spec->match_value,
1731                                    flow_act, dest, dest_num, fte);
1732                 up_write_ref_node(&fte->node);
1733                 tree_put_node(&fte->node);
1734                 return rule;
1735         }
1736         rule = ERR_PTR(-ENOENT);
1737 out:
1738         list_for_each_entry(iter, match_head, list)
1739                 up_write_ref_node(&iter->g->node);
1740         kmem_cache_free(steering->ftes_cache, fte);
1741         return rule;
1742 }
1743
1744 static struct mlx5_flow_handle *
1745 _mlx5_add_flow_rules(struct mlx5_flow_table *ft,
1746                      struct mlx5_flow_spec *spec,
1747                      struct mlx5_flow_act *flow_act,
1748                      struct mlx5_flow_destination *dest,
1749                      int dest_num)
1750
1751 {
1752         struct mlx5_flow_steering *steering = get_steering(&ft->node);
1753         struct mlx5_flow_group *g;
1754         struct mlx5_flow_handle *rule;
1755         struct match_list_head match_head;
1756         bool take_write = false;
1757         struct fs_fte *fte;
1758         int version;
1759         int err;
1760         int i;
1761
1762         if (!check_valid_spec(spec))
1763                 return ERR_PTR(-EINVAL);
1764
1765         for (i = 0; i < dest_num; i++) {
1766                 if (!dest_is_valid(&dest[i], flow_act->action, ft))
1767                         return ERR_PTR(-EINVAL);
1768         }
1769         nested_down_read_ref_node(&ft->node, FS_LOCK_GRANDPARENT);
1770 search_again_locked:
1771         version = atomic_read(&ft->node.version);
1772
1773         /* Collect all fgs which has a matching match_criteria */
1774         err = build_match_list(&match_head, ft, spec);
1775         if (err) {
1776                 if (take_write)
1777                         up_write_ref_node(&ft->node);
1778                 return ERR_PTR(err);
1779         }
1780
1781         if (!take_write)
1782                 up_read_ref_node(&ft->node);
1783
1784         rule = try_add_to_existing_fg(ft, &match_head.list, spec, flow_act, dest,
1785                                       dest_num, version);
1786         free_match_list(&match_head);
1787         if (!IS_ERR(rule) ||
1788             (PTR_ERR(rule) != -ENOENT && PTR_ERR(rule) != -EAGAIN)) {
1789                 if (take_write)
1790                         up_write_ref_node(&ft->node);
1791                 return rule;
1792         }
1793
1794         if (!take_write) {
1795                 nested_down_write_ref_node(&ft->node, FS_LOCK_GRANDPARENT);
1796                 take_write = true;
1797         }
1798
1799         if (PTR_ERR(rule) == -EAGAIN ||
1800             version != atomic_read(&ft->node.version))
1801                 goto search_again_locked;
1802
1803         g = alloc_auto_flow_group(ft, spec);
1804         if (IS_ERR(g)) {
1805                 rule = (void *)g;
1806                 up_write_ref_node(&ft->node);
1807                 return rule;
1808         }
1809
1810         nested_down_write_ref_node(&g->node, FS_LOCK_PARENT);
1811         up_write_ref_node(&ft->node);
1812
1813         err = create_auto_flow_group(ft, g);
1814         if (err)
1815                 goto err_release_fg;
1816
1817         fte = alloc_fte(ft, spec->match_value, flow_act);
1818         if (IS_ERR(fte)) {
1819                 err = PTR_ERR(fte);
1820                 goto err_release_fg;
1821         }
1822
1823         err = insert_fte(g, fte);
1824         if (err) {
1825                 kmem_cache_free(steering->ftes_cache, fte);
1826                 goto err_release_fg;
1827         }
1828
1829         nested_down_write_ref_node(&fte->node, FS_LOCK_CHILD);
1830         up_write_ref_node(&g->node);
1831         rule = add_rule_fg(g, spec->match_value, flow_act, dest,
1832                            dest_num, fte);
1833         up_write_ref_node(&fte->node);
1834         tree_put_node(&fte->node);
1835         tree_put_node(&g->node);
1836         return rule;
1837
1838 err_release_fg:
1839         up_write_ref_node(&g->node);
1840         tree_put_node(&g->node);
1841         return ERR_PTR(err);
1842 }
1843
1844 static bool fwd_next_prio_supported(struct mlx5_flow_table *ft)
1845 {
1846         return ((ft->type == FS_FT_NIC_RX) &&
1847                 (MLX5_CAP_FLOWTABLE(get_dev(&ft->node), nic_rx_multi_path_tirs)));
1848 }
1849
1850 struct mlx5_flow_handle *
1851 mlx5_add_flow_rules(struct mlx5_flow_table *ft,
1852                     struct mlx5_flow_spec *spec,
1853                     struct mlx5_flow_act *flow_act,
1854                     struct mlx5_flow_destination *dest,
1855                     int dest_num)
1856 {
1857         struct mlx5_flow_root_namespace *root = find_root(&ft->node);
1858         struct mlx5_flow_destination gen_dest = {};
1859         struct mlx5_flow_table *next_ft = NULL;
1860         struct mlx5_flow_handle *handle = NULL;
1861         u32 sw_action = flow_act->action;
1862         struct fs_prio *prio;
1863
1864         fs_get_obj(prio, ft->node.parent);
1865         if (flow_act->action == MLX5_FLOW_CONTEXT_ACTION_FWD_NEXT_PRIO) {
1866                 if (!fwd_next_prio_supported(ft))
1867                         return ERR_PTR(-EOPNOTSUPP);
1868                 if (dest)
1869                         return ERR_PTR(-EINVAL);
1870                 mutex_lock(&root->chain_lock);
1871                 next_ft = find_next_chained_ft(prio);
1872                 if (next_ft) {
1873                         gen_dest.type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE;
1874                         gen_dest.ft = next_ft;
1875                         dest = &gen_dest;
1876                         dest_num = 1;
1877                         flow_act->action = MLX5_FLOW_CONTEXT_ACTION_FWD_DEST;
1878                 } else {
1879                         mutex_unlock(&root->chain_lock);
1880                         return ERR_PTR(-EOPNOTSUPP);
1881                 }
1882         }
1883
1884         handle = _mlx5_add_flow_rules(ft, spec, flow_act, dest, dest_num);
1885
1886         if (sw_action == MLX5_FLOW_CONTEXT_ACTION_FWD_NEXT_PRIO) {
1887                 if (!IS_ERR_OR_NULL(handle) &&
1888                     (list_empty(&handle->rule[0]->next_ft))) {
1889                         mutex_lock(&next_ft->lock);
1890                         list_add(&handle->rule[0]->next_ft,
1891                                  &next_ft->fwd_rules);
1892                         mutex_unlock(&next_ft->lock);
1893                         handle->rule[0]->sw_action = MLX5_FLOW_CONTEXT_ACTION_FWD_NEXT_PRIO;
1894                 }
1895                 mutex_unlock(&root->chain_lock);
1896         }
1897         return handle;
1898 }
1899 EXPORT_SYMBOL(mlx5_add_flow_rules);
1900
1901 void mlx5_del_flow_rules(struct mlx5_flow_handle *handle)
1902 {
1903         int i;
1904
1905         for (i = handle->num_rules - 1; i >= 0; i--)
1906                 tree_remove_node(&handle->rule[i]->node);
1907         kfree(handle);
1908 }
1909 EXPORT_SYMBOL(mlx5_del_flow_rules);
1910
1911 /* Assuming prio->node.children(flow tables) is sorted by level */
1912 static struct mlx5_flow_table *find_next_ft(struct mlx5_flow_table *ft)
1913 {
1914         struct fs_prio *prio;
1915
1916         fs_get_obj(prio, ft->node.parent);
1917
1918         if (!list_is_last(&ft->node.list, &prio->node.children))
1919                 return list_next_entry(ft, node.list);
1920         return find_next_chained_ft(prio);
1921 }
1922
1923 static int update_root_ft_destroy(struct mlx5_flow_table *ft)
1924 {
1925         struct mlx5_flow_root_namespace *root = find_root(&ft->node);
1926         struct mlx5_ft_underlay_qp *uqp;
1927         struct mlx5_flow_table *new_root_ft = NULL;
1928         int err = 0;
1929         u32 qpn;
1930
1931         if (root->root_ft != ft)
1932                 return 0;
1933
1934         new_root_ft = find_next_ft(ft);
1935         if (!new_root_ft) {
1936                 root->root_ft = NULL;
1937                 return 0;
1938         }
1939
1940         if (list_empty(&root->underlay_qpns)) {
1941                 /* Don't set any QPN (zero) in case QPN list is empty */
1942                 qpn = 0;
1943                 err = root->cmds->update_root_ft(root->dev, new_root_ft,
1944                                                  qpn, false);
1945         } else {
1946                 list_for_each_entry(uqp, &root->underlay_qpns, list) {
1947                         qpn = uqp->qpn;
1948                         err = root->cmds->update_root_ft(root->dev,
1949                                                          new_root_ft, qpn,
1950                                                          false);
1951                         if (err)
1952                                 break;
1953                 }
1954         }
1955
1956         if (err)
1957                 mlx5_core_warn(root->dev,
1958                                "Update root flow table of id(%u) qpn(%d) failed\n",
1959                                ft->id, qpn);
1960         else
1961                 root->root_ft = new_root_ft;
1962
1963         return 0;
1964 }
1965
1966 /* Connect flow table from previous priority to
1967  * the next flow table.
1968  */
1969 static int disconnect_flow_table(struct mlx5_flow_table *ft)
1970 {
1971         struct mlx5_core_dev *dev = get_dev(&ft->node);
1972         struct mlx5_flow_table *next_ft;
1973         struct fs_prio *prio;
1974         int err = 0;
1975
1976         err = update_root_ft_destroy(ft);
1977         if (err)
1978                 return err;
1979
1980         fs_get_obj(prio, ft->node.parent);
1981         if  (!(list_first_entry(&prio->node.children,
1982                                 struct mlx5_flow_table,
1983                                 node.list) == ft))
1984                 return 0;
1985
1986         next_ft = find_next_chained_ft(prio);
1987         err = connect_fwd_rules(dev, next_ft, ft);
1988         if (err)
1989                 return err;
1990
1991         err = connect_prev_fts(dev, next_ft, prio);
1992         if (err)
1993                 mlx5_core_warn(dev, "Failed to disconnect flow table %d\n",
1994                                ft->id);
1995         return err;
1996 }
1997
1998 int mlx5_destroy_flow_table(struct mlx5_flow_table *ft)
1999 {
2000         struct mlx5_flow_root_namespace *root = find_root(&ft->node);
2001         int err = 0;
2002
2003         mutex_lock(&root->chain_lock);
2004         err = disconnect_flow_table(ft);
2005         if (err) {
2006                 mutex_unlock(&root->chain_lock);
2007                 return err;
2008         }
2009         if (tree_remove_node(&ft->node))
2010                 mlx5_core_warn(get_dev(&ft->node), "Flow table %d wasn't destroyed, refcount > 1\n",
2011                                ft->id);
2012         mutex_unlock(&root->chain_lock);
2013
2014         return err;
2015 }
2016 EXPORT_SYMBOL(mlx5_destroy_flow_table);
2017
2018 void mlx5_destroy_flow_group(struct mlx5_flow_group *fg)
2019 {
2020         if (tree_remove_node(&fg->node))
2021                 mlx5_core_warn(get_dev(&fg->node), "Flow group %d wasn't destroyed, refcount > 1\n",
2022                                fg->id);
2023 }
2024
2025 struct mlx5_flow_namespace *mlx5_get_flow_namespace(struct mlx5_core_dev *dev,
2026                                                     enum mlx5_flow_namespace_type type)
2027 {
2028         struct mlx5_flow_steering *steering = dev->priv.steering;
2029         struct mlx5_flow_root_namespace *root_ns;
2030         int prio;
2031         struct fs_prio *fs_prio;
2032         struct mlx5_flow_namespace *ns;
2033
2034         if (!steering)
2035                 return NULL;
2036
2037         switch (type) {
2038         case MLX5_FLOW_NAMESPACE_BYPASS:
2039         case MLX5_FLOW_NAMESPACE_LAG:
2040         case MLX5_FLOW_NAMESPACE_OFFLOADS:
2041         case MLX5_FLOW_NAMESPACE_ETHTOOL:
2042         case MLX5_FLOW_NAMESPACE_KERNEL:
2043         case MLX5_FLOW_NAMESPACE_LEFTOVERS:
2044         case MLX5_FLOW_NAMESPACE_ANCHOR:
2045                 prio = type;
2046                 break;
2047         case MLX5_FLOW_NAMESPACE_FDB:
2048                 if (steering->fdb_root_ns)
2049                         return &steering->fdb_root_ns->ns;
2050                 else
2051                         return NULL;
2052         case MLX5_FLOW_NAMESPACE_SNIFFER_RX:
2053                 if (steering->sniffer_rx_root_ns)
2054                         return &steering->sniffer_rx_root_ns->ns;
2055                 else
2056                         return NULL;
2057         case MLX5_FLOW_NAMESPACE_SNIFFER_TX:
2058                 if (steering->sniffer_tx_root_ns)
2059                         return &steering->sniffer_tx_root_ns->ns;
2060                 else
2061                         return NULL;
2062         case MLX5_FLOW_NAMESPACE_EGRESS:
2063                 if (steering->egress_root_ns)
2064                         return &steering->egress_root_ns->ns;
2065                 else
2066                         return NULL;
2067         default:
2068                 return NULL;
2069         }
2070
2071         root_ns = steering->root_ns;
2072         if (!root_ns)
2073                 return NULL;
2074
2075         fs_prio = find_prio(&root_ns->ns, prio);
2076         if (!fs_prio)
2077                 return NULL;
2078
2079         ns = list_first_entry(&fs_prio->node.children,
2080                               typeof(*ns),
2081                               node.list);
2082
2083         return ns;
2084 }
2085 EXPORT_SYMBOL(mlx5_get_flow_namespace);
2086
2087 struct mlx5_flow_namespace *mlx5_get_flow_vport_acl_namespace(struct mlx5_core_dev *dev,
2088                                                               enum mlx5_flow_namespace_type type,
2089                                                               int vport)
2090 {
2091         struct mlx5_flow_steering *steering = dev->priv.steering;
2092
2093         if (!steering || vport >= MLX5_TOTAL_VPORTS(dev))
2094                 return NULL;
2095
2096         switch (type) {
2097         case MLX5_FLOW_NAMESPACE_ESW_EGRESS:
2098                 if (steering->esw_egress_root_ns &&
2099                     steering->esw_egress_root_ns[vport])
2100                         return &steering->esw_egress_root_ns[vport]->ns;
2101                 else
2102                         return NULL;
2103         case MLX5_FLOW_NAMESPACE_ESW_INGRESS:
2104                 if (steering->esw_ingress_root_ns &&
2105                     steering->esw_ingress_root_ns[vport])
2106                         return &steering->esw_ingress_root_ns[vport]->ns;
2107                 else
2108                         return NULL;
2109         default:
2110                 return NULL;
2111         }
2112 }
2113
2114 static struct fs_prio *fs_create_prio(struct mlx5_flow_namespace *ns,
2115                                       unsigned int prio, int num_levels)
2116 {
2117         struct fs_prio *fs_prio;
2118
2119         fs_prio = kzalloc(sizeof(*fs_prio), GFP_KERNEL);
2120         if (!fs_prio)
2121                 return ERR_PTR(-ENOMEM);
2122
2123         fs_prio->node.type = FS_TYPE_PRIO;
2124         tree_init_node(&fs_prio->node, NULL, del_sw_prio);
2125         tree_add_node(&fs_prio->node, &ns->node);
2126         fs_prio->num_levels = num_levels;
2127         fs_prio->prio = prio;
2128         list_add_tail(&fs_prio->node.list, &ns->node.children);
2129
2130         return fs_prio;
2131 }
2132
2133 static struct mlx5_flow_namespace *fs_init_namespace(struct mlx5_flow_namespace
2134                                                      *ns)
2135 {
2136         ns->node.type = FS_TYPE_NAMESPACE;
2137
2138         return ns;
2139 }
2140
2141 static struct mlx5_flow_namespace *fs_create_namespace(struct fs_prio *prio)
2142 {
2143         struct mlx5_flow_namespace      *ns;
2144
2145         ns = kzalloc(sizeof(*ns), GFP_KERNEL);
2146         if (!ns)
2147                 return ERR_PTR(-ENOMEM);
2148
2149         fs_init_namespace(ns);
2150         tree_init_node(&ns->node, NULL, del_sw_ns);
2151         tree_add_node(&ns->node, &prio->node);
2152         list_add_tail(&ns->node.list, &prio->node.children);
2153
2154         return ns;
2155 }
2156
2157 static int create_leaf_prios(struct mlx5_flow_namespace *ns, int prio,
2158                              struct init_tree_node *prio_metadata)
2159 {
2160         struct fs_prio *fs_prio;
2161         int i;
2162
2163         for (i = 0; i < prio_metadata->num_leaf_prios; i++) {
2164                 fs_prio = fs_create_prio(ns, prio++, prio_metadata->num_levels);
2165                 if (IS_ERR(fs_prio))
2166                         return PTR_ERR(fs_prio);
2167         }
2168         return 0;
2169 }
2170
2171 #define FLOW_TABLE_BIT_SZ 1
2172 #define GET_FLOW_TABLE_CAP(dev, offset) \
2173         ((be32_to_cpu(*((__be32 *)(dev->caps.hca_cur[MLX5_CAP_FLOW_TABLE]) +    \
2174                         offset / 32)) >>                                        \
2175           (32 - FLOW_TABLE_BIT_SZ - (offset & 0x1f))) & FLOW_TABLE_BIT_SZ)
2176 static bool has_required_caps(struct mlx5_core_dev *dev, struct node_caps *caps)
2177 {
2178         int i;
2179
2180         for (i = 0; i < caps->arr_sz; i++) {
2181                 if (!GET_FLOW_TABLE_CAP(dev, caps->caps[i]))
2182                         return false;
2183         }
2184         return true;
2185 }
2186
2187 static int init_root_tree_recursive(struct mlx5_flow_steering *steering,
2188                                     struct init_tree_node *init_node,
2189                                     struct fs_node *fs_parent_node,
2190                                     struct init_tree_node *init_parent_node,
2191                                     int prio)
2192 {
2193         int max_ft_level = MLX5_CAP_FLOWTABLE(steering->dev,
2194                                               flow_table_properties_nic_receive.
2195                                               max_ft_level);
2196         struct mlx5_flow_namespace *fs_ns;
2197         struct fs_prio *fs_prio;
2198         struct fs_node *base;
2199         int i;
2200         int err;
2201
2202         if (init_node->type == FS_TYPE_PRIO) {
2203                 if ((init_node->min_ft_level > max_ft_level) ||
2204                     !has_required_caps(steering->dev, &init_node->caps))
2205                         return 0;
2206
2207                 fs_get_obj(fs_ns, fs_parent_node);
2208                 if (init_node->num_leaf_prios)
2209                         return create_leaf_prios(fs_ns, prio, init_node);
2210                 fs_prio = fs_create_prio(fs_ns, prio, init_node->num_levels);
2211                 if (IS_ERR(fs_prio))
2212                         return PTR_ERR(fs_prio);
2213                 base = &fs_prio->node;
2214         } else if (init_node->type == FS_TYPE_NAMESPACE) {
2215                 fs_get_obj(fs_prio, fs_parent_node);
2216                 fs_ns = fs_create_namespace(fs_prio);
2217                 if (IS_ERR(fs_ns))
2218                         return PTR_ERR(fs_ns);
2219                 base = &fs_ns->node;
2220         } else {
2221                 return -EINVAL;
2222         }
2223         prio = 0;
2224         for (i = 0; i < init_node->ar_size; i++) {
2225                 err = init_root_tree_recursive(steering, &init_node->children[i],
2226                                                base, init_node, prio);
2227                 if (err)
2228                         return err;
2229                 if (init_node->children[i].type == FS_TYPE_PRIO &&
2230                     init_node->children[i].num_leaf_prios) {
2231                         prio += init_node->children[i].num_leaf_prios;
2232                 }
2233         }
2234
2235         return 0;
2236 }
2237
2238 static int init_root_tree(struct mlx5_flow_steering *steering,
2239                           struct init_tree_node *init_node,
2240                           struct fs_node *fs_parent_node)
2241 {
2242         int i;
2243         struct mlx5_flow_namespace *fs_ns;
2244         int err;
2245
2246         fs_get_obj(fs_ns, fs_parent_node);
2247         for (i = 0; i < init_node->ar_size; i++) {
2248                 err = init_root_tree_recursive(steering, &init_node->children[i],
2249                                                &fs_ns->node,
2250                                                init_node, i);
2251                 if (err)
2252                         return err;
2253         }
2254         return 0;
2255 }
2256
2257 static struct mlx5_flow_root_namespace
2258 *create_root_ns(struct mlx5_flow_steering *steering,
2259                 enum fs_flow_table_type table_type)
2260 {
2261         const struct mlx5_flow_cmds *cmds = mlx5_fs_cmd_get_default(table_type);
2262         struct mlx5_flow_root_namespace *root_ns;
2263         struct mlx5_flow_namespace *ns;
2264
2265         if (mlx5_accel_ipsec_device_caps(steering->dev) & MLX5_ACCEL_IPSEC_CAP_DEVICE &&
2266             (table_type == FS_FT_NIC_RX || table_type == FS_FT_NIC_TX))
2267                 cmds = mlx5_fs_cmd_get_default_ipsec_fpga_cmds(table_type);
2268
2269         /* Create the root namespace */
2270         root_ns = kvzalloc(sizeof(*root_ns), GFP_KERNEL);
2271         if (!root_ns)
2272                 return NULL;
2273
2274         root_ns->dev = steering->dev;
2275         root_ns->table_type = table_type;
2276         root_ns->cmds = cmds;
2277
2278         INIT_LIST_HEAD(&root_ns->underlay_qpns);
2279
2280         ns = &root_ns->ns;
2281         fs_init_namespace(ns);
2282         mutex_init(&root_ns->chain_lock);
2283         tree_init_node(&ns->node, NULL, NULL);
2284         tree_add_node(&ns->node, NULL);
2285
2286         return root_ns;
2287 }
2288
2289 static void set_prio_attrs_in_prio(struct fs_prio *prio, int acc_level);
2290
2291 static int set_prio_attrs_in_ns(struct mlx5_flow_namespace *ns, int acc_level)
2292 {
2293         struct fs_prio *prio;
2294
2295         fs_for_each_prio(prio, ns) {
2296                  /* This updates prio start_level and num_levels */
2297                 set_prio_attrs_in_prio(prio, acc_level);
2298                 acc_level += prio->num_levels;
2299         }
2300         return acc_level;
2301 }
2302
2303 static void set_prio_attrs_in_prio(struct fs_prio *prio, int acc_level)
2304 {
2305         struct mlx5_flow_namespace *ns;
2306         int acc_level_ns = acc_level;
2307
2308         prio->start_level = acc_level;
2309         fs_for_each_ns(ns, prio)
2310                 /* This updates start_level and num_levels of ns's priority descendants */
2311                 acc_level_ns = set_prio_attrs_in_ns(ns, acc_level);
2312         if (!prio->num_levels)
2313                 prio->num_levels = acc_level_ns - prio->start_level;
2314         WARN_ON(prio->num_levels < acc_level_ns - prio->start_level);
2315 }
2316
2317 static void set_prio_attrs(struct mlx5_flow_root_namespace *root_ns)
2318 {
2319         struct mlx5_flow_namespace *ns = &root_ns->ns;
2320         struct fs_prio *prio;
2321         int start_level = 0;
2322
2323         fs_for_each_prio(prio, ns) {
2324                 set_prio_attrs_in_prio(prio, start_level);
2325                 start_level += prio->num_levels;
2326         }
2327 }
2328
2329 #define ANCHOR_PRIO 0
2330 #define ANCHOR_SIZE 1
2331 #define ANCHOR_LEVEL 0
2332 static int create_anchor_flow_table(struct mlx5_flow_steering *steering)
2333 {
2334         struct mlx5_flow_namespace *ns = NULL;
2335         struct mlx5_flow_table_attr ft_attr = {};
2336         struct mlx5_flow_table *ft;
2337
2338         ns = mlx5_get_flow_namespace(steering->dev, MLX5_FLOW_NAMESPACE_ANCHOR);
2339         if (WARN_ON(!ns))
2340                 return -EINVAL;
2341
2342         ft_attr.max_fte = ANCHOR_SIZE;
2343         ft_attr.level   = ANCHOR_LEVEL;
2344         ft_attr.prio    = ANCHOR_PRIO;
2345
2346         ft = mlx5_create_flow_table(ns, &ft_attr);
2347         if (IS_ERR(ft)) {
2348                 mlx5_core_err(steering->dev, "Failed to create last anchor flow table");
2349                 return PTR_ERR(ft);
2350         }
2351         return 0;
2352 }
2353
2354 static int init_root_ns(struct mlx5_flow_steering *steering)
2355 {
2356         int err;
2357
2358         steering->root_ns = create_root_ns(steering, FS_FT_NIC_RX);
2359         if (!steering->root_ns)
2360                 return -ENOMEM;
2361
2362         err = init_root_tree(steering, &root_fs, &steering->root_ns->ns.node);
2363         if (err)
2364                 goto out_err;
2365
2366         set_prio_attrs(steering->root_ns);
2367         err = create_anchor_flow_table(steering);
2368         if (err)
2369                 goto out_err;
2370
2371         return 0;
2372
2373 out_err:
2374         cleanup_root_ns(steering->root_ns);
2375         steering->root_ns = NULL;
2376         return err;
2377 }
2378
2379 static void clean_tree(struct fs_node *node)
2380 {
2381         if (node) {
2382                 struct fs_node *iter;
2383                 struct fs_node *temp;
2384
2385                 tree_get_node(node);
2386                 list_for_each_entry_safe(iter, temp, &node->children, list)
2387                         clean_tree(iter);
2388                 tree_put_node(node);
2389                 tree_remove_node(node);
2390         }
2391 }
2392
2393 static void cleanup_root_ns(struct mlx5_flow_root_namespace *root_ns)
2394 {
2395         if (!root_ns)
2396                 return;
2397
2398         clean_tree(&root_ns->ns.node);
2399 }
2400
2401 static void cleanup_egress_acls_root_ns(struct mlx5_core_dev *dev)
2402 {
2403         struct mlx5_flow_steering *steering = dev->priv.steering;
2404         int i;
2405
2406         if (!steering->esw_egress_root_ns)
2407                 return;
2408
2409         for (i = 0; i < MLX5_TOTAL_VPORTS(dev); i++)
2410                 cleanup_root_ns(steering->esw_egress_root_ns[i]);
2411
2412         kfree(steering->esw_egress_root_ns);
2413 }
2414
2415 static void cleanup_ingress_acls_root_ns(struct mlx5_core_dev *dev)
2416 {
2417         struct mlx5_flow_steering *steering = dev->priv.steering;
2418         int i;
2419
2420         if (!steering->esw_ingress_root_ns)
2421                 return;
2422
2423         for (i = 0; i < MLX5_TOTAL_VPORTS(dev); i++)
2424                 cleanup_root_ns(steering->esw_ingress_root_ns[i]);
2425
2426         kfree(steering->esw_ingress_root_ns);
2427 }
2428
2429 void mlx5_cleanup_fs(struct mlx5_core_dev *dev)
2430 {
2431         struct mlx5_flow_steering *steering = dev->priv.steering;
2432
2433         cleanup_root_ns(steering->root_ns);
2434         cleanup_egress_acls_root_ns(dev);
2435         cleanup_ingress_acls_root_ns(dev);
2436         cleanup_root_ns(steering->fdb_root_ns);
2437         cleanup_root_ns(steering->sniffer_rx_root_ns);
2438         cleanup_root_ns(steering->sniffer_tx_root_ns);
2439         cleanup_root_ns(steering->egress_root_ns);
2440         mlx5_cleanup_fc_stats(dev);
2441         kmem_cache_destroy(steering->ftes_cache);
2442         kmem_cache_destroy(steering->fgs_cache);
2443         kfree(steering);
2444 }
2445
2446 static int init_sniffer_tx_root_ns(struct mlx5_flow_steering *steering)
2447 {
2448         struct fs_prio *prio;
2449
2450         steering->sniffer_tx_root_ns = create_root_ns(steering, FS_FT_SNIFFER_TX);
2451         if (!steering->sniffer_tx_root_ns)
2452                 return -ENOMEM;
2453
2454         /* Create single prio */
2455         prio = fs_create_prio(&steering->sniffer_tx_root_ns->ns, 0, 1);
2456         if (IS_ERR(prio)) {
2457                 cleanup_root_ns(steering->sniffer_tx_root_ns);
2458                 return PTR_ERR(prio);
2459         }
2460         return 0;
2461 }
2462
2463 static int init_sniffer_rx_root_ns(struct mlx5_flow_steering *steering)
2464 {
2465         struct fs_prio *prio;
2466
2467         steering->sniffer_rx_root_ns = create_root_ns(steering, FS_FT_SNIFFER_RX);
2468         if (!steering->sniffer_rx_root_ns)
2469                 return -ENOMEM;
2470
2471         /* Create single prio */
2472         prio = fs_create_prio(&steering->sniffer_rx_root_ns->ns, 0, 1);
2473         if (IS_ERR(prio)) {
2474                 cleanup_root_ns(steering->sniffer_rx_root_ns);
2475                 return PTR_ERR(prio);
2476         }
2477         return 0;
2478 }
2479
2480 static int init_fdb_root_ns(struct mlx5_flow_steering *steering)
2481 {
2482         struct fs_prio *prio;
2483
2484         steering->fdb_root_ns = create_root_ns(steering, FS_FT_FDB);
2485         if (!steering->fdb_root_ns)
2486                 return -ENOMEM;
2487
2488         prio = fs_create_prio(&steering->fdb_root_ns->ns, 0, 1);
2489         if (IS_ERR(prio))
2490                 goto out_err;
2491
2492         prio = fs_create_prio(&steering->fdb_root_ns->ns, 1, 1);
2493         if (IS_ERR(prio))
2494                 goto out_err;
2495
2496         set_prio_attrs(steering->fdb_root_ns);
2497         return 0;
2498
2499 out_err:
2500         cleanup_root_ns(steering->fdb_root_ns);
2501         steering->fdb_root_ns = NULL;
2502         return PTR_ERR(prio);
2503 }
2504
2505 static int init_egress_acl_root_ns(struct mlx5_flow_steering *steering, int vport)
2506 {
2507         struct fs_prio *prio;
2508
2509         steering->esw_egress_root_ns[vport] = create_root_ns(steering, FS_FT_ESW_EGRESS_ACL);
2510         if (!steering->esw_egress_root_ns[vport])
2511                 return -ENOMEM;
2512
2513         /* create 1 prio*/
2514         prio = fs_create_prio(&steering->esw_egress_root_ns[vport]->ns, 0, 1);
2515         return PTR_ERR_OR_ZERO(prio);
2516 }
2517
2518 static int init_ingress_acl_root_ns(struct mlx5_flow_steering *steering, int vport)
2519 {
2520         struct fs_prio *prio;
2521
2522         steering->esw_ingress_root_ns[vport] = create_root_ns(steering, FS_FT_ESW_INGRESS_ACL);
2523         if (!steering->esw_ingress_root_ns[vport])
2524                 return -ENOMEM;
2525
2526         /* create 1 prio*/
2527         prio = fs_create_prio(&steering->esw_ingress_root_ns[vport]->ns, 0, 1);
2528         return PTR_ERR_OR_ZERO(prio);
2529 }
2530
2531 static int init_egress_acls_root_ns(struct mlx5_core_dev *dev)
2532 {
2533         struct mlx5_flow_steering *steering = dev->priv.steering;
2534         int err;
2535         int i;
2536
2537         steering->esw_egress_root_ns = kcalloc(MLX5_TOTAL_VPORTS(dev),
2538                                                sizeof(*steering->esw_egress_root_ns),
2539                                                GFP_KERNEL);
2540         if (!steering->esw_egress_root_ns)
2541                 return -ENOMEM;
2542
2543         for (i = 0; i < MLX5_TOTAL_VPORTS(dev); i++) {
2544                 err = init_egress_acl_root_ns(steering, i);
2545                 if (err)
2546                         goto cleanup_root_ns;
2547         }
2548
2549         return 0;
2550
2551 cleanup_root_ns:
2552         for (i--; i >= 0; i--)
2553                 cleanup_root_ns(steering->esw_egress_root_ns[i]);
2554         kfree(steering->esw_egress_root_ns);
2555         return err;
2556 }
2557
2558 static int init_ingress_acls_root_ns(struct mlx5_core_dev *dev)
2559 {
2560         struct mlx5_flow_steering *steering = dev->priv.steering;
2561         int err;
2562         int i;
2563
2564         steering->esw_ingress_root_ns = kcalloc(MLX5_TOTAL_VPORTS(dev),
2565                                                 sizeof(*steering->esw_ingress_root_ns),
2566                                                 GFP_KERNEL);
2567         if (!steering->esw_ingress_root_ns)
2568                 return -ENOMEM;
2569
2570         for (i = 0; i < MLX5_TOTAL_VPORTS(dev); i++) {
2571                 err = init_ingress_acl_root_ns(steering, i);
2572                 if (err)
2573                         goto cleanup_root_ns;
2574         }
2575
2576         return 0;
2577
2578 cleanup_root_ns:
2579         for (i--; i >= 0; i--)
2580                 cleanup_root_ns(steering->esw_ingress_root_ns[i]);
2581         kfree(steering->esw_ingress_root_ns);
2582         return err;
2583 }
2584
2585 static int init_egress_root_ns(struct mlx5_flow_steering *steering)
2586 {
2587         struct fs_prio *prio;
2588
2589         steering->egress_root_ns = create_root_ns(steering,
2590                                                   FS_FT_NIC_TX);
2591         if (!steering->egress_root_ns)
2592                 return -ENOMEM;
2593
2594         /* create 1 prio*/
2595         prio = fs_create_prio(&steering->egress_root_ns->ns, 0, 1);
2596         return PTR_ERR_OR_ZERO(prio);
2597 }
2598
2599 int mlx5_init_fs(struct mlx5_core_dev *dev)
2600 {
2601         struct mlx5_flow_steering *steering;
2602         int err = 0;
2603
2604         err = mlx5_init_fc_stats(dev);
2605         if (err)
2606                 return err;
2607
2608         steering = kzalloc(sizeof(*steering), GFP_KERNEL);
2609         if (!steering)
2610                 return -ENOMEM;
2611         steering->dev = dev;
2612         dev->priv.steering = steering;
2613
2614         steering->fgs_cache = kmem_cache_create("mlx5_fs_fgs",
2615                                                 sizeof(struct mlx5_flow_group), 0,
2616                                                 0, NULL);
2617         steering->ftes_cache = kmem_cache_create("mlx5_fs_ftes", sizeof(struct fs_fte), 0,
2618                                                  0, NULL);
2619         if (!steering->ftes_cache || !steering->fgs_cache) {
2620                 err = -ENOMEM;
2621                 goto err;
2622         }
2623
2624         if ((((MLX5_CAP_GEN(dev, port_type) == MLX5_CAP_PORT_TYPE_ETH) &&
2625               (MLX5_CAP_GEN(dev, nic_flow_table))) ||
2626              ((MLX5_CAP_GEN(dev, port_type) == MLX5_CAP_PORT_TYPE_IB) &&
2627               MLX5_CAP_GEN(dev, ipoib_enhanced_offloads))) &&
2628             MLX5_CAP_FLOWTABLE_NIC_RX(dev, ft_support)) {
2629                 err = init_root_ns(steering);
2630                 if (err)
2631                         goto err;
2632         }
2633
2634         if (MLX5_CAP_GEN(dev, eswitch_flow_table)) {
2635                 if (MLX5_CAP_ESW_FLOWTABLE_FDB(dev, ft_support)) {
2636                         err = init_fdb_root_ns(steering);
2637                         if (err)
2638                                 goto err;
2639                 }
2640                 if (MLX5_CAP_ESW_EGRESS_ACL(dev, ft_support)) {
2641                         err = init_egress_acls_root_ns(dev);
2642                         if (err)
2643                                 goto err;
2644                 }
2645                 if (MLX5_CAP_ESW_INGRESS_ACL(dev, ft_support)) {
2646                         err = init_ingress_acls_root_ns(dev);
2647                         if (err)
2648                                 goto err;
2649                 }
2650         }
2651
2652         if (MLX5_CAP_FLOWTABLE_SNIFFER_RX(dev, ft_support)) {
2653                 err = init_sniffer_rx_root_ns(steering);
2654                 if (err)
2655                         goto err;
2656         }
2657
2658         if (MLX5_CAP_FLOWTABLE_SNIFFER_TX(dev, ft_support)) {
2659                 err = init_sniffer_tx_root_ns(steering);
2660                 if (err)
2661                         goto err;
2662         }
2663
2664         if (MLX5_IPSEC_DEV(dev)) {
2665                 err = init_egress_root_ns(steering);
2666                 if (err)
2667                         goto err;
2668         }
2669
2670         return 0;
2671 err:
2672         mlx5_cleanup_fs(dev);
2673         return err;
2674 }
2675
2676 int mlx5_fs_add_rx_underlay_qpn(struct mlx5_core_dev *dev, u32 underlay_qpn)
2677 {
2678         struct mlx5_flow_root_namespace *root = dev->priv.steering->root_ns;
2679         struct mlx5_ft_underlay_qp *new_uqp;
2680         int err = 0;
2681
2682         new_uqp = kzalloc(sizeof(*new_uqp), GFP_KERNEL);
2683         if (!new_uqp)
2684                 return -ENOMEM;
2685
2686         mutex_lock(&root->chain_lock);
2687
2688         if (!root->root_ft) {
2689                 err = -EINVAL;
2690                 goto update_ft_fail;
2691         }
2692
2693         err = root->cmds->update_root_ft(dev, root->root_ft, underlay_qpn,
2694                                          false);
2695         if (err) {
2696                 mlx5_core_warn(dev, "Failed adding underlay QPN (%u) to root FT err(%d)\n",
2697                                underlay_qpn, err);
2698                 goto update_ft_fail;
2699         }
2700
2701         new_uqp->qpn = underlay_qpn;
2702         list_add_tail(&new_uqp->list, &root->underlay_qpns);
2703
2704         mutex_unlock(&root->chain_lock);
2705
2706         return 0;
2707
2708 update_ft_fail:
2709         mutex_unlock(&root->chain_lock);
2710         kfree(new_uqp);
2711         return err;
2712 }
2713 EXPORT_SYMBOL(mlx5_fs_add_rx_underlay_qpn);
2714
2715 int mlx5_fs_remove_rx_underlay_qpn(struct mlx5_core_dev *dev, u32 underlay_qpn)
2716 {
2717         struct mlx5_flow_root_namespace *root = dev->priv.steering->root_ns;
2718         struct mlx5_ft_underlay_qp *uqp;
2719         bool found = false;
2720         int err = 0;
2721
2722         mutex_lock(&root->chain_lock);
2723         list_for_each_entry(uqp, &root->underlay_qpns, list) {
2724                 if (uqp->qpn == underlay_qpn) {
2725                         found = true;
2726                         break;
2727                 }
2728         }
2729
2730         if (!found) {
2731                 mlx5_core_warn(dev, "Failed finding underlay qp (%u) in qpn list\n",
2732                                underlay_qpn);
2733                 err = -EINVAL;
2734                 goto out;
2735         }
2736
2737         err = root->cmds->update_root_ft(dev, root->root_ft, underlay_qpn,
2738                                          true);
2739         if (err)
2740                 mlx5_core_warn(dev, "Failed removing underlay QPN (%u) from root FT err(%d)\n",
2741                                underlay_qpn, err);
2742
2743         list_del(&uqp->list);
2744         mutex_unlock(&root->chain_lock);
2745         kfree(uqp);
2746
2747         return 0;
2748
2749 out:
2750         mutex_unlock(&root->chain_lock);
2751         return err;
2752 }
2753 EXPORT_SYMBOL(mlx5_fs_remove_rx_underlay_qpn);