diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/esw/chains.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/esw/chains.c | 944 |
1 files changed, 0 insertions, 944 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/esw/chains.c b/drivers/net/ethernet/mellanox/mlx5/core/esw/chains.c deleted file mode 100644 index d5bf908dfecd..000000000000 --- a/drivers/net/ethernet/mellanox/mlx5/core/esw/chains.c +++ /dev/null @@ -1,944 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB -// Copyright (c) 2020 Mellanox Technologies. - -#include <linux/mlx5/driver.h> -#include <linux/mlx5/mlx5_ifc.h> -#include <linux/mlx5/fs.h> - -#include "esw/chains.h" -#include "en/mapping.h" -#include "mlx5_core.h" -#include "fs_core.h" -#include "eswitch.h" -#include "en.h" -#include "en_tc.h" - -#define esw_chains_priv(esw) ((esw)->fdb_table.offloads.esw_chains_priv) -#define esw_chains_lock(esw) (esw_chains_priv(esw)->lock) -#define esw_chains_ht(esw) (esw_chains_priv(esw)->chains_ht) -#define esw_chains_mapping(esw) (esw_chains_priv(esw)->chains_mapping) -#define esw_prios_ht(esw) (esw_chains_priv(esw)->prios_ht) -#define fdb_pool_left(esw) (esw_chains_priv(esw)->fdb_left) -#define tc_slow_fdb(esw) ((esw)->fdb_table.offloads.slow_fdb) -#define tc_end_fdb(esw) (esw_chains_priv(esw)->tc_end_fdb) -#define fdb_ignore_flow_level_supported(esw) \ - (MLX5_CAP_ESW_FLOWTABLE_FDB((esw)->dev, ignore_flow_level)) -#define fdb_modify_header_fwd_to_table_supported(esw) \ - (MLX5_CAP_ESW_FLOWTABLE((esw)->dev, fdb_modify_header_fwd_to_table)) - -/* Firmware currently has 4 pool of 4 sizes that it supports (ESW_POOLS), - * and a virtual memory region of 16M (ESW_SIZE), this region is duplicated - * for each flow table pool. We can allocate up to 16M of each pool, - * and we keep track of how much we used via get_next_avail_sz_from_pool. - * Firmware doesn't report any of this for now. - * ESW_POOL is expected to be sorted from large to small and match firmware - * pools. - */ -#define ESW_SIZE (16 * 1024 * 1024) -static const unsigned int ESW_POOLS[] = { 4 * 1024 * 1024, - 1 * 1024 * 1024, - 64 * 1024, - 128 }; -#define ESW_FT_TBL_SZ (64 * 1024) - -struct mlx5_esw_chains_priv { - struct rhashtable chains_ht; - struct rhashtable prios_ht; - /* Protects above chains_ht and prios_ht */ - struct mutex lock; - - struct mlx5_flow_table *tc_end_fdb; - struct mapping_ctx *chains_mapping; - - int fdb_left[ARRAY_SIZE(ESW_POOLS)]; -}; - -struct fdb_chain { - struct rhash_head node; - - u32 chain; - - int ref; - int id; - - struct mlx5_eswitch *esw; - struct list_head prios_list; - struct mlx5_flow_handle *restore_rule; - struct mlx5_modify_hdr *miss_modify_hdr; -}; - -struct fdb_prio_key { - u32 chain; - u32 prio; - u32 level; -}; - -struct fdb_prio { - struct rhash_head node; - struct list_head list; - - struct fdb_prio_key key; - - int ref; - - struct fdb_chain *fdb_chain; - struct mlx5_flow_table *fdb; - struct mlx5_flow_table *next_fdb; - struct mlx5_flow_group *miss_group; - struct mlx5_flow_handle *miss_rule; -}; - -static const struct rhashtable_params chain_params = { - .head_offset = offsetof(struct fdb_chain, node), - .key_offset = offsetof(struct fdb_chain, chain), - .key_len = sizeof_field(struct fdb_chain, chain), - .automatic_shrinking = true, -}; - -static const struct rhashtable_params prio_params = { - .head_offset = offsetof(struct fdb_prio, node), - .key_offset = offsetof(struct fdb_prio, key), - .key_len = sizeof_field(struct fdb_prio, key), - .automatic_shrinking = true, -}; - -bool mlx5_esw_chains_prios_supported(struct mlx5_eswitch *esw) -{ - return esw->fdb_table.flags & ESW_FDB_CHAINS_AND_PRIOS_SUPPORTED; -} - -bool mlx5_esw_chains_backwards_supported(struct mlx5_eswitch *esw) -{ - return mlx5_esw_chains_prios_supported(esw) && - fdb_ignore_flow_level_supported(esw); -} - -u32 mlx5_esw_chains_get_chain_range(struct mlx5_eswitch *esw) -{ - if (!mlx5_esw_chains_prios_supported(esw)) - return 1; - - if (fdb_ignore_flow_level_supported(esw)) - return UINT_MAX - 1; - - return FDB_TC_MAX_CHAIN; -} - -u32 mlx5_esw_chains_get_ft_chain(struct mlx5_eswitch *esw) -{ - return mlx5_esw_chains_get_chain_range(esw) + 1; -} - -u32 mlx5_esw_chains_get_prio_range(struct mlx5_eswitch *esw) -{ - if (!mlx5_esw_chains_prios_supported(esw)) - return 1; - - if (fdb_ignore_flow_level_supported(esw)) - return UINT_MAX; - - return FDB_TC_MAX_PRIO; -} - -static unsigned int mlx5_esw_chains_get_level_range(struct mlx5_eswitch *esw) -{ - if (fdb_ignore_flow_level_supported(esw)) - return UINT_MAX; - - return FDB_TC_LEVELS_PER_PRIO; -} - -#define POOL_NEXT_SIZE 0 -static int -mlx5_esw_chains_get_avail_sz_from_pool(struct mlx5_eswitch *esw, - int desired_size) -{ - int i, found_i = -1; - - for (i = ARRAY_SIZE(ESW_POOLS) - 1; i >= 0; i--) { - if (fdb_pool_left(esw)[i] && ESW_POOLS[i] > desired_size) { - found_i = i; - if (desired_size != POOL_NEXT_SIZE) - break; - } - } - - if (found_i != -1) { - --fdb_pool_left(esw)[found_i]; - return ESW_POOLS[found_i]; - } - - return 0; -} - -static void -mlx5_esw_chains_put_sz_to_pool(struct mlx5_eswitch *esw, int sz) -{ - int i; - - for (i = ARRAY_SIZE(ESW_POOLS) - 1; i >= 0; i--) { - if (sz == ESW_POOLS[i]) { - ++fdb_pool_left(esw)[i]; - return; - } - } - - WARN_ONCE(1, "Couldn't find size %d in fdb size pool", sz); -} - -static void -mlx5_esw_chains_init_sz_pool(struct mlx5_eswitch *esw) -{ - u32 fdb_max; - int i; - - fdb_max = 1 << MLX5_CAP_ESW_FLOWTABLE_FDB(esw->dev, log_max_ft_size); - - for (i = ARRAY_SIZE(ESW_POOLS) - 1; i >= 0; i--) - fdb_pool_left(esw)[i] = - ESW_POOLS[i] <= fdb_max ? ESW_SIZE / ESW_POOLS[i] : 0; -} - -static struct mlx5_flow_table * -mlx5_esw_chains_create_fdb_table(struct mlx5_eswitch *esw, - u32 chain, u32 prio, u32 level) -{ - struct mlx5_flow_table_attr ft_attr = {}; - struct mlx5_flow_namespace *ns; - struct mlx5_flow_table *fdb; - int sz; - - if (esw->offloads.encap != DEVLINK_ESWITCH_ENCAP_MODE_NONE) - ft_attr.flags |= (MLX5_FLOW_TABLE_TUNNEL_EN_REFORMAT | - MLX5_FLOW_TABLE_TUNNEL_EN_DECAP); - - sz = (chain == mlx5_esw_chains_get_ft_chain(esw)) ? - mlx5_esw_chains_get_avail_sz_from_pool(esw, ESW_FT_TBL_SZ) : - mlx5_esw_chains_get_avail_sz_from_pool(esw, POOL_NEXT_SIZE); - if (!sz) - return ERR_PTR(-ENOSPC); - ft_attr.max_fte = sz; - - /* We use tc_slow_fdb(esw) as the table's next_ft till - * ignore_flow_level is allowed on FT creation and not just for FTEs. - * Instead caller should add an explicit miss rule if needed. - */ - ft_attr.next_ft = tc_slow_fdb(esw); - - /* The root table(chain 0, prio 1, level 0) is required to be - * connected to the previous prio (FDB_BYPASS_PATH if exists). - * We always create it, as a managed table, in order to align with - * fs_core logic. - */ - if (!fdb_ignore_flow_level_supported(esw) || - (chain == 0 && prio == 1 && level == 0)) { - ft_attr.level = level; - ft_attr.prio = prio - 1; - ns = mlx5_get_fdb_sub_ns(esw->dev, chain); - } else { - ft_attr.flags |= MLX5_FLOW_TABLE_UNMANAGED; - ft_attr.prio = FDB_TC_OFFLOAD; - /* Firmware doesn't allow us to create another level 0 table, - * so we create all unmanaged tables as level 1. - * - * To connect them, we use explicit miss rules with - * ignore_flow_level. Caller is responsible to create - * these rules (if needed). - */ - ft_attr.level = 1; - ns = mlx5_get_flow_namespace(esw->dev, MLX5_FLOW_NAMESPACE_FDB); - } - - ft_attr.autogroup.num_reserved_entries = 2; - ft_attr.autogroup.max_num_groups = esw->params.large_group_num; - fdb = mlx5_create_auto_grouped_flow_table(ns, &ft_attr); - if (IS_ERR(fdb)) { - esw_warn(esw->dev, - "Failed to create FDB table err %d (chain: %d, prio: %d, level: %d, size: %d)\n", - (int)PTR_ERR(fdb), chain, prio, level, sz); - mlx5_esw_chains_put_sz_to_pool(esw, sz); - return fdb; - } - - return fdb; -} - -static void -mlx5_esw_chains_destroy_fdb_table(struct mlx5_eswitch *esw, - struct mlx5_flow_table *fdb) -{ - mlx5_esw_chains_put_sz_to_pool(esw, fdb->max_fte); - mlx5_destroy_flow_table(fdb); -} - -static int -create_fdb_chain_restore(struct fdb_chain *fdb_chain) -{ - char modact[MLX5_UN_SZ_BYTES(set_add_copy_action_in_auto)]; - struct mlx5_eswitch *esw = fdb_chain->esw; - struct mlx5_modify_hdr *mod_hdr; - u32 index; - int err; - - if (fdb_chain->chain == mlx5_esw_chains_get_ft_chain(esw) || - !mlx5_esw_chains_prios_supported(esw)) - return 0; - - err = mapping_add(esw_chains_mapping(esw), &fdb_chain->chain, &index); - if (err) - return err; - if (index == MLX5_FS_DEFAULT_FLOW_TAG) { - /* we got the special default flow tag id, so we won't know - * if we actually marked the packet with the restore rule - * we create. - * - * This case isn't possible with MLX5_FS_DEFAULT_FLOW_TAG = 0. - */ - err = mapping_add(esw_chains_mapping(esw), - &fdb_chain->chain, &index); - mapping_remove(esw_chains_mapping(esw), - MLX5_FS_DEFAULT_FLOW_TAG); - if (err) - return err; - } - - fdb_chain->id = index; - - MLX5_SET(set_action_in, modact, action_type, MLX5_ACTION_TYPE_SET); - MLX5_SET(set_action_in, modact, field, - mlx5e_tc_attr_to_reg_mappings[CHAIN_TO_REG].mfield); - MLX5_SET(set_action_in, modact, offset, - mlx5e_tc_attr_to_reg_mappings[CHAIN_TO_REG].moffset * 8); - MLX5_SET(set_action_in, modact, length, - mlx5e_tc_attr_to_reg_mappings[CHAIN_TO_REG].mlen * 8); - MLX5_SET(set_action_in, modact, data, fdb_chain->id); - mod_hdr = mlx5_modify_header_alloc(esw->dev, MLX5_FLOW_NAMESPACE_FDB, - 1, modact); - if (IS_ERR(mod_hdr)) { - err = PTR_ERR(mod_hdr); - goto err_mod_hdr; - } - fdb_chain->miss_modify_hdr = mod_hdr; - - fdb_chain->restore_rule = esw_add_restore_rule(esw, fdb_chain->id); - if (IS_ERR(fdb_chain->restore_rule)) { - err = PTR_ERR(fdb_chain->restore_rule); - goto err_rule; - } - - return 0; - -err_rule: - mlx5_modify_header_dealloc(esw->dev, fdb_chain->miss_modify_hdr); -err_mod_hdr: - /* Datapath can't find this mapping, so we can safely remove it */ - mapping_remove(esw_chains_mapping(esw), fdb_chain->id); - return err; -} - -static void destroy_fdb_chain_restore(struct fdb_chain *fdb_chain) -{ - struct mlx5_eswitch *esw = fdb_chain->esw; - - if (!fdb_chain->miss_modify_hdr) - return; - - mlx5_del_flow_rules(fdb_chain->restore_rule); - mlx5_modify_header_dealloc(esw->dev, fdb_chain->miss_modify_hdr); - mapping_remove(esw_chains_mapping(esw), fdb_chain->id); -} - -static struct fdb_chain * -mlx5_esw_chains_create_fdb_chain(struct mlx5_eswitch *esw, u32 chain) -{ - struct fdb_chain *fdb_chain = NULL; - int err; - - fdb_chain = kvzalloc(sizeof(*fdb_chain), GFP_KERNEL); - if (!fdb_chain) - return ERR_PTR(-ENOMEM); - - fdb_chain->esw = esw; - fdb_chain->chain = chain; - INIT_LIST_HEAD(&fdb_chain->prios_list); - - err = create_fdb_chain_restore(fdb_chain); - if (err) - goto err_restore; - - err = rhashtable_insert_fast(&esw_chains_ht(esw), &fdb_chain->node, - chain_params); - if (err) - goto err_insert; - - return fdb_chain; - -err_insert: - destroy_fdb_chain_restore(fdb_chain); -err_restore: - kvfree(fdb_chain); - return ERR_PTR(err); -} - -static void -mlx5_esw_chains_destroy_fdb_chain(struct fdb_chain *fdb_chain) -{ - struct mlx5_eswitch *esw = fdb_chain->esw; - - rhashtable_remove_fast(&esw_chains_ht(esw), &fdb_chain->node, - chain_params); - - destroy_fdb_chain_restore(fdb_chain); - kvfree(fdb_chain); -} - -static struct fdb_chain * -mlx5_esw_chains_get_fdb_chain(struct mlx5_eswitch *esw, u32 chain) -{ - struct fdb_chain *fdb_chain; - - fdb_chain = rhashtable_lookup_fast(&esw_chains_ht(esw), &chain, - chain_params); - if (!fdb_chain) { - fdb_chain = mlx5_esw_chains_create_fdb_chain(esw, chain); - if (IS_ERR(fdb_chain)) - return fdb_chain; - } - - fdb_chain->ref++; - - return fdb_chain; -} - -static struct mlx5_flow_handle * -mlx5_esw_chains_add_miss_rule(struct fdb_chain *fdb_chain, - struct mlx5_flow_table *fdb, - struct mlx5_flow_table *next_fdb) -{ - struct mlx5_eswitch *esw = fdb_chain->esw; - struct mlx5_flow_destination dest = {}; - struct mlx5_flow_act act = {}; - - act.flags = FLOW_ACT_IGNORE_FLOW_LEVEL | FLOW_ACT_NO_APPEND; - act.action = MLX5_FLOW_CONTEXT_ACTION_FWD_DEST; - dest.type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE; - dest.ft = next_fdb; - - if (next_fdb == tc_end_fdb(esw) && - mlx5_esw_chains_prios_supported(esw)) { - act.modify_hdr = fdb_chain->miss_modify_hdr; - act.action |= MLX5_FLOW_CONTEXT_ACTION_MOD_HDR; - } - - return mlx5_add_flow_rules(fdb, NULL, &act, &dest, 1); -} - -static int -mlx5_esw_chains_update_prio_prevs(struct fdb_prio *fdb_prio, - struct mlx5_flow_table *next_fdb) -{ - struct mlx5_flow_handle *miss_rules[FDB_TC_LEVELS_PER_PRIO + 1] = {}; - struct fdb_chain *fdb_chain = fdb_prio->fdb_chain; - struct fdb_prio *pos; - int n = 0, err; - - if (fdb_prio->key.level) - return 0; - - /* Iterate in reverse order until reaching the level 0 rule of - * the previous priority, adding all the miss rules first, so we can - * revert them if any of them fails. - */ - pos = fdb_prio; - list_for_each_entry_continue_reverse(pos, - &fdb_chain->prios_list, - list) { - miss_rules[n] = mlx5_esw_chains_add_miss_rule(fdb_chain, - pos->fdb, - next_fdb); - if (IS_ERR(miss_rules[n])) { - err = PTR_ERR(miss_rules[n]); - goto err_prev_rule; - } - - n++; - if (!pos->key.level) - break; - } - - /* Success, delete old miss rules, and update the pointers. */ - n = 0; - pos = fdb_prio; - list_for_each_entry_continue_reverse(pos, - &fdb_chain->prios_list, - list) { - mlx5_del_flow_rules(pos->miss_rule); - - pos->miss_rule = miss_rules[n]; - pos->next_fdb = next_fdb; - - n++; - if (!pos->key.level) - break; - } - - return 0; - -err_prev_rule: - while (--n >= 0) - mlx5_del_flow_rules(miss_rules[n]); - - return err; -} - -static void -mlx5_esw_chains_put_fdb_chain(struct fdb_chain *fdb_chain) -{ - if (--fdb_chain->ref == 0) - mlx5_esw_chains_destroy_fdb_chain(fdb_chain); -} - -static struct fdb_prio * -mlx5_esw_chains_create_fdb_prio(struct mlx5_eswitch *esw, - u32 chain, u32 prio, u32 level) -{ - int inlen = MLX5_ST_SZ_BYTES(create_flow_group_in); - struct mlx5_flow_handle *miss_rule = NULL; - struct mlx5_flow_group *miss_group; - struct fdb_prio *fdb_prio = NULL; - struct mlx5_flow_table *next_fdb; - struct fdb_chain *fdb_chain; - struct mlx5_flow_table *fdb; - struct list_head *pos; - u32 *flow_group_in; - int err; - - fdb_chain = mlx5_esw_chains_get_fdb_chain(esw, chain); - if (IS_ERR(fdb_chain)) - return ERR_CAST(fdb_chain); - - fdb_prio = kvzalloc(sizeof(*fdb_prio), GFP_KERNEL); - flow_group_in = kvzalloc(inlen, GFP_KERNEL); - if (!fdb_prio || !flow_group_in) { - err = -ENOMEM; - goto err_alloc; - } - - /* Chain's prio list is sorted by prio and level. - * And all levels of some prio point to the next prio's level 0. - * Example list (prio, level): - * (3,0)->(3,1)->(5,0)->(5,1)->(6,1)->(7,0) - * In hardware, we will we have the following pointers: - * (3,0) -> (5,0) -> (7,0) -> Slow path - * (3,1) -> (5,0) - * (5,1) -> (7,0) - * (6,1) -> (7,0) - */ - - /* Default miss for each chain: */ - next_fdb = (chain == mlx5_esw_chains_get_ft_chain(esw)) ? - tc_slow_fdb(esw) : - tc_end_fdb(esw); - list_for_each(pos, &fdb_chain->prios_list) { - struct fdb_prio *p = list_entry(pos, struct fdb_prio, list); - - /* exit on first pos that is larger */ - if (prio < p->key.prio || (prio == p->key.prio && - level < p->key.level)) { - /* Get next level 0 table */ - next_fdb = p->key.level == 0 ? p->fdb : p->next_fdb; - break; - } - } - - fdb = mlx5_esw_chains_create_fdb_table(esw, chain, prio, level); - if (IS_ERR(fdb)) { - err = PTR_ERR(fdb); - goto err_create; - } - - MLX5_SET(create_flow_group_in, flow_group_in, start_flow_index, - fdb->max_fte - 2); - MLX5_SET(create_flow_group_in, flow_group_in, end_flow_index, - fdb->max_fte - 1); - miss_group = mlx5_create_flow_group(fdb, flow_group_in); - if (IS_ERR(miss_group)) { - err = PTR_ERR(miss_group); - goto err_group; - } - - /* Add miss rule to next_fdb */ - miss_rule = mlx5_esw_chains_add_miss_rule(fdb_chain, fdb, next_fdb); - if (IS_ERR(miss_rule)) { - err = PTR_ERR(miss_rule); - goto err_miss_rule; - } - - fdb_prio->miss_group = miss_group; - fdb_prio->miss_rule = miss_rule; - fdb_prio->next_fdb = next_fdb; - fdb_prio->fdb_chain = fdb_chain; - fdb_prio->key.chain = chain; - fdb_prio->key.prio = prio; - fdb_prio->key.level = level; - fdb_prio->fdb = fdb; - - err = rhashtable_insert_fast(&esw_prios_ht(esw), &fdb_prio->node, - prio_params); - if (err) - goto err_insert; - - list_add(&fdb_prio->list, pos->prev); - - /* Table is ready, connect it */ - err = mlx5_esw_chains_update_prio_prevs(fdb_prio, fdb); - if (err) - goto err_update; - - kvfree(flow_group_in); - return fdb_prio; - -err_update: - list_del(&fdb_prio->list); - rhashtable_remove_fast(&esw_prios_ht(esw), &fdb_prio->node, - prio_params); -err_insert: - mlx5_del_flow_rules(miss_rule); -err_miss_rule: - mlx5_destroy_flow_group(miss_group); -err_group: - mlx5_esw_chains_destroy_fdb_table(esw, fdb); -err_create: -err_alloc: - kvfree(fdb_prio); - kvfree(flow_group_in); - mlx5_esw_chains_put_fdb_chain(fdb_chain); - return ERR_PTR(err); -} - -static void -mlx5_esw_chains_destroy_fdb_prio(struct mlx5_eswitch *esw, - struct fdb_prio *fdb_prio) -{ - struct fdb_chain *fdb_chain = fdb_prio->fdb_chain; - - WARN_ON(mlx5_esw_chains_update_prio_prevs(fdb_prio, - fdb_prio->next_fdb)); - - list_del(&fdb_prio->list); - rhashtable_remove_fast(&esw_prios_ht(esw), &fdb_prio->node, - prio_params); - mlx5_del_flow_rules(fdb_prio->miss_rule); - mlx5_destroy_flow_group(fdb_prio->miss_group); - mlx5_esw_chains_destroy_fdb_table(esw, fdb_prio->fdb); - mlx5_esw_chains_put_fdb_chain(fdb_chain); - kvfree(fdb_prio); -} - -struct mlx5_flow_table * -mlx5_esw_chains_get_table(struct mlx5_eswitch *esw, u32 chain, u32 prio, - u32 level) -{ - struct mlx5_flow_table *prev_fts; - struct fdb_prio *fdb_prio; - struct fdb_prio_key key; - int l = 0; - - if ((chain > mlx5_esw_chains_get_chain_range(esw) && - chain != mlx5_esw_chains_get_ft_chain(esw)) || - prio > mlx5_esw_chains_get_prio_range(esw) || - level > mlx5_esw_chains_get_level_range(esw)) - return ERR_PTR(-EOPNOTSUPP); - - /* create earlier levels for correct fs_core lookup when - * connecting tables. - */ - for (l = 0; l < level; l++) { - prev_fts = mlx5_esw_chains_get_table(esw, chain, prio, l); - if (IS_ERR(prev_fts)) { - fdb_prio = ERR_CAST(prev_fts); - goto err_get_prevs; - } - } - - key.chain = chain; - key.prio = prio; - key.level = level; - - mutex_lock(&esw_chains_lock(esw)); - fdb_prio = rhashtable_lookup_fast(&esw_prios_ht(esw), &key, - prio_params); - if (!fdb_prio) { - fdb_prio = mlx5_esw_chains_create_fdb_prio(esw, chain, - prio, level); - if (IS_ERR(fdb_prio)) - goto err_create_prio; - } - - ++fdb_prio->ref; - mutex_unlock(&esw_chains_lock(esw)); - - return fdb_prio->fdb; - -err_create_prio: - mutex_unlock(&esw_chains_lock(esw)); -err_get_prevs: - while (--l >= 0) - mlx5_esw_chains_put_table(esw, chain, prio, l); - return ERR_CAST(fdb_prio); -} - -void -mlx5_esw_chains_put_table(struct mlx5_eswitch *esw, u32 chain, u32 prio, - u32 level) -{ - struct fdb_prio *fdb_prio; - struct fdb_prio_key key; - - key.chain = chain; - key.prio = prio; - key.level = level; - - mutex_lock(&esw_chains_lock(esw)); - fdb_prio = rhashtable_lookup_fast(&esw_prios_ht(esw), &key, - prio_params); - if (!fdb_prio) - goto err_get_prio; - - if (--fdb_prio->ref == 0) - mlx5_esw_chains_destroy_fdb_prio(esw, fdb_prio); - mutex_unlock(&esw_chains_lock(esw)); - - while (level-- > 0) - mlx5_esw_chains_put_table(esw, chain, prio, level); - - return; - -err_get_prio: - mutex_unlock(&esw_chains_lock(esw)); - WARN_ONCE(1, - "Couldn't find table: (chain: %d prio: %d level: %d)", - chain, prio, level); -} - -struct mlx5_flow_table * -mlx5_esw_chains_get_tc_end_ft(struct mlx5_eswitch *esw) -{ - return tc_end_fdb(esw); -} - -struct mlx5_flow_table * -mlx5_esw_chains_create_global_table(struct mlx5_eswitch *esw) -{ - u32 chain, prio, level; - int err; - - if (!fdb_ignore_flow_level_supported(esw)) { - err = -EOPNOTSUPP; - - esw_warn(esw->dev, - "Couldn't create global flow table, ignore_flow_level not supported."); - goto err_ignore; - } - - chain = mlx5_esw_chains_get_chain_range(esw), - prio = mlx5_esw_chains_get_prio_range(esw); - level = mlx5_esw_chains_get_level_range(esw); - - return mlx5_esw_chains_create_fdb_table(esw, chain, prio, level); - -err_ignore: - return ERR_PTR(err); -} - -void -mlx5_esw_chains_destroy_global_table(struct mlx5_eswitch *esw, - struct mlx5_flow_table *ft) -{ - mlx5_esw_chains_destroy_fdb_table(esw, ft); -} - -static int -mlx5_esw_chains_init(struct mlx5_eswitch *esw) -{ - struct mlx5_esw_chains_priv *chains_priv; - struct mlx5_core_dev *dev = esw->dev; - u32 max_flow_counter, fdb_max; - struct mapping_ctx *mapping; - int err; - - chains_priv = kzalloc(sizeof(*chains_priv), GFP_KERNEL); - if (!chains_priv) - return -ENOMEM; - esw_chains_priv(esw) = chains_priv; - - max_flow_counter = (MLX5_CAP_GEN(dev, max_flow_counter_31_16) << 16) | - MLX5_CAP_GEN(dev, max_flow_counter_15_0); - fdb_max = 1 << MLX5_CAP_ESW_FLOWTABLE_FDB(dev, log_max_ft_size); - - esw_debug(dev, - "Init esw offloads chains, max counters(%d), groups(%d), max flow table size(%d)\n", - max_flow_counter, esw->params.large_group_num, fdb_max); - - mlx5_esw_chains_init_sz_pool(esw); - - if (!MLX5_CAP_ESW_FLOWTABLE(esw->dev, multi_fdb_encap) && - esw->offloads.encap != DEVLINK_ESWITCH_ENCAP_MODE_NONE) { - esw->fdb_table.flags &= ~ESW_FDB_CHAINS_AND_PRIOS_SUPPORTED; - esw_warn(dev, "Tc chains and priorities offload aren't supported, update firmware if needed\n"); - } else if (!mlx5_eswitch_reg_c1_loopback_enabled(esw)) { - esw->fdb_table.flags &= ~ESW_FDB_CHAINS_AND_PRIOS_SUPPORTED; - esw_warn(dev, "Tc chains and priorities offload aren't supported\n"); - } else if (!fdb_modify_header_fwd_to_table_supported(esw)) { - /* Disabled when ttl workaround is needed, e.g - * when ESWITCH_IPV4_TTL_MODIFY_ENABLE = true in mlxconfig - */ - esw_warn(dev, - "Tc chains and priorities offload aren't supported, check firmware version, or mlxconfig settings\n"); - esw->fdb_table.flags &= ~ESW_FDB_CHAINS_AND_PRIOS_SUPPORTED; - } else { - esw->fdb_table.flags |= ESW_FDB_CHAINS_AND_PRIOS_SUPPORTED; - esw_info(dev, "Supported tc offload range - chains: %u, prios: %u\n", - mlx5_esw_chains_get_chain_range(esw), - mlx5_esw_chains_get_prio_range(esw)); - } - - err = rhashtable_init(&esw_chains_ht(esw), &chain_params); - if (err) - goto init_chains_ht_err; - - err = rhashtable_init(&esw_prios_ht(esw), &prio_params); - if (err) - goto init_prios_ht_err; - - mapping = mapping_create(sizeof(u32), esw_get_max_restore_tag(esw), - true); - if (IS_ERR(mapping)) { - err = PTR_ERR(mapping); - goto mapping_err; - } - esw_chains_mapping(esw) = mapping; - - mutex_init(&esw_chains_lock(esw)); - - return 0; - -mapping_err: - rhashtable_destroy(&esw_prios_ht(esw)); -init_prios_ht_err: - rhashtable_destroy(&esw_chains_ht(esw)); -init_chains_ht_err: - kfree(chains_priv); - return err; -} - -static void -mlx5_esw_chains_cleanup(struct mlx5_eswitch *esw) -{ - mutex_destroy(&esw_chains_lock(esw)); - mapping_destroy(esw_chains_mapping(esw)); - rhashtable_destroy(&esw_prios_ht(esw)); - rhashtable_destroy(&esw_chains_ht(esw)); - - kfree(esw_chains_priv(esw)); -} - -static int -mlx5_esw_chains_open(struct mlx5_eswitch *esw) -{ - struct mlx5_flow_table *ft; - int err; - - /* Create tc_end_fdb(esw) which is the always created ft chain */ - ft = mlx5_esw_chains_get_table(esw, mlx5_esw_chains_get_ft_chain(esw), - 1, 0); - if (IS_ERR(ft)) - return PTR_ERR(ft); - - tc_end_fdb(esw) = ft; - - /* Always open the root for fast path */ - ft = mlx5_esw_chains_get_table(esw, 0, 1, 0); - if (IS_ERR(ft)) { - err = PTR_ERR(ft); - goto level_0_err; - } - - /* Open level 1 for split rules now if prios isn't supported */ - if (!mlx5_esw_chains_prios_supported(esw)) { - err = mlx5_esw_vport_tbl_get(esw); - if (err) - goto level_1_err; - } - - return 0; - -level_1_err: - mlx5_esw_chains_put_table(esw, 0, 1, 0); -level_0_err: - mlx5_esw_chains_put_table(esw, mlx5_esw_chains_get_ft_chain(esw), 1, 0); - return err; -} - -static void -mlx5_esw_chains_close(struct mlx5_eswitch *esw) -{ - if (!mlx5_esw_chains_prios_supported(esw)) - mlx5_esw_vport_tbl_put(esw); - mlx5_esw_chains_put_table(esw, 0, 1, 0); - mlx5_esw_chains_put_table(esw, mlx5_esw_chains_get_ft_chain(esw), 1, 0); -} - -int -mlx5_esw_chains_create(struct mlx5_eswitch *esw) -{ - int err; - - err = mlx5_esw_chains_init(esw); - if (err) - return err; - - err = mlx5_esw_chains_open(esw); - if (err) - goto err_open; - - return 0; - -err_open: - mlx5_esw_chains_cleanup(esw); - return err; -} - -void -mlx5_esw_chains_destroy(struct mlx5_eswitch *esw) -{ - mlx5_esw_chains_close(esw); - mlx5_esw_chains_cleanup(esw); -} - -int -mlx5_esw_chains_get_chain_mapping(struct mlx5_eswitch *esw, u32 chain, - u32 *chain_mapping) -{ - return mapping_add(esw_chains_mapping(esw), &chain, chain_mapping); -} - -int -mlx5_esw_chains_put_chain_mapping(struct mlx5_eswitch *esw, u32 chain_mapping) -{ - return mapping_remove(esw_chains_mapping(esw), chain_mapping); -} - -int mlx5_eswitch_get_chain_for_tag(struct mlx5_eswitch *esw, u32 tag, - u32 *chain) -{ - int err; - - err = mapping_find(esw_chains_mapping(esw), tag, chain); - if (err) { - esw_warn(esw->dev, "Can't find chain for tag: %d\n", tag); - return -ENOENT; - } - - return 0; -} |