Commit 41d07074 authored by Alex Vesker's avatar Alex Vesker Committed by Saeed Mahameed

net/mlx5: DR, Expose steering rule functionality

Rules are the actual objects that tie matchers, header values and
actions. Each rule belongs to a matcher, which can hold multiple rules
sharing the same mask. Each rule is a specific set of values and
actions.
When a packet reaches a matcher it is being matched against the
matcher`s rules. In case of a match over a rule its actions will be
executed. Each rule object contains a set of STEs, where each STE is a
definition of match values and actions defined by the rule.
This file handles the rule operations and processing.
Signed-off-by: default avatarAlex Vesker <valex@mellanox.com>
Signed-off-by: default avatarErez Shitrit <erezsh@mellanox.com>
Reviewed-by: default avatarMark Bloch <markb@mellanox.com>
Signed-off-by: default avatarSaeed Mahameed <saeedm@mellanox.com>
parent 9db810ed
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/* Copyright (c) 2019 Mellanox Technologies. */
#include "dr_types.h"
#define DR_RULE_MAX_STE_CHAIN (DR_RULE_MAX_STES + DR_ACTION_MAX_STES)
struct mlx5dr_rule_action_member {
struct mlx5dr_action *action;
struct list_head list;
};
static int dr_rule_append_to_miss_list(struct mlx5dr_ste *new_last_ste,
struct list_head *miss_list,
struct list_head *send_list)
{
struct mlx5dr_ste_send_info *ste_info_last;
struct mlx5dr_ste *last_ste;
/* The new entry will be inserted after the last */
last_ste = list_entry(miss_list->prev, struct mlx5dr_ste, miss_list_node);
WARN_ON(!last_ste);
ste_info_last = kzalloc(sizeof(*ste_info_last), GFP_KERNEL);
if (!ste_info_last)
return -ENOMEM;
mlx5dr_ste_set_miss_addr(last_ste->hw_ste,
mlx5dr_ste_get_icm_addr(new_last_ste));
list_add_tail(&new_last_ste->miss_list_node, miss_list);
mlx5dr_send_fill_and_append_ste_send_info(last_ste, DR_STE_SIZE_REDUCED,
0, last_ste->hw_ste,
ste_info_last, send_list, true);
return 0;
}
static struct mlx5dr_ste *
dr_rule_create_collision_htbl(struct mlx5dr_matcher *matcher,
struct mlx5dr_matcher_rx_tx *nic_matcher,
u8 *hw_ste)
{
struct mlx5dr_domain *dmn = matcher->tbl->dmn;
struct mlx5dr_ste_htbl *new_htbl;
struct mlx5dr_ste *ste;
/* Create new table for miss entry */
new_htbl = mlx5dr_ste_htbl_alloc(dmn->ste_icm_pool,
DR_CHUNK_SIZE_1,
MLX5DR_STE_LU_TYPE_DONT_CARE,
0);
if (!new_htbl) {
mlx5dr_dbg(dmn, "Failed allocating collision table\n");
return NULL;
}
/* One and only entry, never grows */
ste = new_htbl->ste_arr;
mlx5dr_ste_set_miss_addr(hw_ste, nic_matcher->e_anchor->chunk->icm_addr);
mlx5dr_htbl_get(new_htbl);
return ste;
}
static struct mlx5dr_ste *
dr_rule_create_collision_entry(struct mlx5dr_matcher *matcher,
struct mlx5dr_matcher_rx_tx *nic_matcher,
u8 *hw_ste,
struct mlx5dr_ste *orig_ste)
{
struct mlx5dr_ste *ste;
ste = dr_rule_create_collision_htbl(matcher, nic_matcher, hw_ste);
if (!ste) {
mlx5dr_dbg(matcher->tbl->dmn, "Failed creating collision entry\n");
return NULL;
}
ste->ste_chain_location = orig_ste->ste_chain_location;
/* In collision entry, all members share the same miss_list_head */
ste->htbl->miss_list = mlx5dr_ste_get_miss_list(orig_ste);
/* Next table */
if (mlx5dr_ste_create_next_htbl(matcher, nic_matcher, ste, hw_ste,
DR_CHUNK_SIZE_1)) {
mlx5dr_dbg(matcher->tbl->dmn, "Failed allocating table\n");
goto free_tbl;
}
return ste;
free_tbl:
mlx5dr_ste_free(ste, matcher, nic_matcher);
return NULL;
}
static int
dr_rule_handle_one_ste_in_update_list(struct mlx5dr_ste_send_info *ste_info,
struct mlx5dr_domain *dmn)
{
int ret;
list_del(&ste_info->send_list);
ret = mlx5dr_send_postsend_ste(dmn, ste_info->ste, ste_info->data,
ste_info->size, ste_info->offset);
if (ret)
goto out;
/* Copy data to ste, only reduced size, the last 16B (mask)
* is already written to the hw.
*/
memcpy(ste_info->ste->hw_ste, ste_info->data, DR_STE_SIZE_REDUCED);
out:
kfree(ste_info);
return ret;
}
static int dr_rule_send_update_list(struct list_head *send_ste_list,
struct mlx5dr_domain *dmn,
bool is_reverse)
{
struct mlx5dr_ste_send_info *ste_info, *tmp_ste_info;
int ret;
if (is_reverse) {
list_for_each_entry_safe_reverse(ste_info, tmp_ste_info,
send_ste_list, send_list) {
ret = dr_rule_handle_one_ste_in_update_list(ste_info,
dmn);
if (ret)
return ret;
}
} else {
list_for_each_entry_safe(ste_info, tmp_ste_info,
send_ste_list, send_list) {
ret = dr_rule_handle_one_ste_in_update_list(ste_info,
dmn);
if (ret)
return ret;
}
}
return 0;
}
static struct mlx5dr_ste *
dr_rule_find_ste_in_miss_list(struct list_head *miss_list, u8 *hw_ste)
{
struct mlx5dr_ste *ste;
if (list_empty(miss_list))
return NULL;
/* Check if hw_ste is present in the list */
list_for_each_entry(ste, miss_list, miss_list_node) {
if (mlx5dr_ste_equal_tag(ste->hw_ste, hw_ste))
return ste;
}
return NULL;
}
static struct mlx5dr_ste *
dr_rule_rehash_handle_collision(struct mlx5dr_matcher *matcher,
struct mlx5dr_matcher_rx_tx *nic_matcher,
struct list_head *update_list,
struct mlx5dr_ste *col_ste,
u8 *hw_ste)
{
struct mlx5dr_ste *new_ste;
int ret;
new_ste = dr_rule_create_collision_htbl(matcher, nic_matcher, hw_ste);
if (!new_ste)
return NULL;
/* In collision entry, all members share the same miss_list_head */
new_ste->htbl->miss_list = mlx5dr_ste_get_miss_list(col_ste);
/* Update the previous from the list */
ret = dr_rule_append_to_miss_list(new_ste,
mlx5dr_ste_get_miss_list(col_ste),
update_list);
if (ret) {
mlx5dr_dbg(matcher->tbl->dmn, "Failed update dup entry\n");
goto err_exit;
}
return new_ste;
err_exit:
mlx5dr_ste_free(new_ste, matcher, nic_matcher);
return NULL;
}
static void dr_rule_rehash_copy_ste_ctrl(struct mlx5dr_matcher *matcher,
struct mlx5dr_matcher_rx_tx *nic_matcher,
struct mlx5dr_ste *cur_ste,
struct mlx5dr_ste *new_ste)
{
new_ste->next_htbl = cur_ste->next_htbl;
new_ste->ste_chain_location = cur_ste->ste_chain_location;
if (!mlx5dr_ste_is_last_in_rule(nic_matcher, new_ste->ste_chain_location))
new_ste->next_htbl->pointing_ste = new_ste;
/* We need to copy the refcount since this ste
* may have been traversed several times
*/
refcount_set(&new_ste->refcount, refcount_read(&cur_ste->refcount));
/* Link old STEs rule_mem list to the new ste */
mlx5dr_rule_update_rule_member(cur_ste, new_ste);
INIT_LIST_HEAD(&new_ste->rule_list);
list_splice_tail_init(&cur_ste->rule_list, &new_ste->rule_list);
}
static struct mlx5dr_ste *
dr_rule_rehash_copy_ste(struct mlx5dr_matcher *matcher,
struct mlx5dr_matcher_rx_tx *nic_matcher,
struct mlx5dr_ste *cur_ste,
struct mlx5dr_ste_htbl *new_htbl,
struct list_head *update_list)
{
struct mlx5dr_ste_send_info *ste_info;
bool use_update_list = false;
u8 hw_ste[DR_STE_SIZE] = {};
struct mlx5dr_ste *new_ste;
int new_idx;
u8 sb_idx;
/* Copy STE mask from the matcher */
sb_idx = cur_ste->ste_chain_location - 1;
mlx5dr_ste_set_bit_mask(hw_ste, nic_matcher->ste_builder[sb_idx].bit_mask);
/* Copy STE control and tag */
memcpy(hw_ste, cur_ste->hw_ste, DR_STE_SIZE_REDUCED);
mlx5dr_ste_set_miss_addr(hw_ste, nic_matcher->e_anchor->chunk->icm_addr);
new_idx = mlx5dr_ste_calc_hash_index(hw_ste, new_htbl);
new_ste = &new_htbl->ste_arr[new_idx];
if (mlx5dr_ste_not_used_ste(new_ste)) {
mlx5dr_htbl_get(new_htbl);
list_add_tail(&new_ste->miss_list_node,
mlx5dr_ste_get_miss_list(new_ste));
} else {
new_ste = dr_rule_rehash_handle_collision(matcher,
nic_matcher,
update_list,
new_ste,
hw_ste);
if (!new_ste) {
mlx5dr_dbg(matcher->tbl->dmn, "Failed adding collision entry, index: %d\n",
new_idx);
return NULL;
}
new_htbl->ctrl.num_of_collisions++;
use_update_list = true;
}
memcpy(new_ste->hw_ste, hw_ste, DR_STE_SIZE_REDUCED);
new_htbl->ctrl.num_of_valid_entries++;
if (use_update_list) {
ste_info = kzalloc(sizeof(*ste_info), GFP_KERNEL);
if (!ste_info)
goto err_exit;
mlx5dr_send_fill_and_append_ste_send_info(new_ste, DR_STE_SIZE, 0,
hw_ste, ste_info,
update_list, true);
}
dr_rule_rehash_copy_ste_ctrl(matcher, nic_matcher, cur_ste, new_ste);
return new_ste;
err_exit:
mlx5dr_ste_free(new_ste, matcher, nic_matcher);
return NULL;
}
static int dr_rule_rehash_copy_miss_list(struct mlx5dr_matcher *matcher,
struct mlx5dr_matcher_rx_tx *nic_matcher,
struct list_head *cur_miss_list,
struct mlx5dr_ste_htbl *new_htbl,
struct list_head *update_list)
{
struct mlx5dr_ste *tmp_ste, *cur_ste, *new_ste;
if (list_empty(cur_miss_list))
return 0;
list_for_each_entry_safe(cur_ste, tmp_ste, cur_miss_list, miss_list_node) {
new_ste = dr_rule_rehash_copy_ste(matcher,
nic_matcher,
cur_ste,
new_htbl,
update_list);
if (!new_ste)
goto err_insert;
list_del(&cur_ste->miss_list_node);
mlx5dr_htbl_put(cur_ste->htbl);
}
return 0;
err_insert:
mlx5dr_err(matcher->tbl->dmn, "Fatal error during resize\n");
WARN_ON(true);
return -EINVAL;
}
static int dr_rule_rehash_copy_htbl(struct mlx5dr_matcher *matcher,
struct mlx5dr_matcher_rx_tx *nic_matcher,
struct mlx5dr_ste_htbl *cur_htbl,
struct mlx5dr_ste_htbl *new_htbl,
struct list_head *update_list)
{
struct mlx5dr_ste *cur_ste;
int cur_entries;
int err = 0;
int i;
cur_entries = mlx5dr_icm_pool_chunk_size_to_entries(cur_htbl->chunk_size);
if (cur_entries < 1) {
mlx5dr_dbg(matcher->tbl->dmn, "Invalid number of entries\n");
return -EINVAL;
}
for (i = 0; i < cur_entries; i++) {
cur_ste = &cur_htbl->ste_arr[i];
if (mlx5dr_ste_not_used_ste(cur_ste)) /* Empty, nothing to copy */
continue;
err = dr_rule_rehash_copy_miss_list(matcher,
nic_matcher,
mlx5dr_ste_get_miss_list(cur_ste),
new_htbl,
update_list);
if (err)
goto clean_copy;
}
clean_copy:
return err;
}
static struct mlx5dr_ste_htbl *
dr_rule_rehash_htbl(struct mlx5dr_rule *rule,
struct mlx5dr_rule_rx_tx *nic_rule,
struct mlx5dr_ste_htbl *cur_htbl,
u8 ste_location,
struct list_head *update_list,
enum mlx5dr_icm_chunk_size new_size)
{
struct mlx5dr_ste_send_info *del_ste_info, *tmp_ste_info;
struct mlx5dr_matcher *matcher = rule->matcher;
struct mlx5dr_domain *dmn = matcher->tbl->dmn;
struct mlx5dr_matcher_rx_tx *nic_matcher;
struct mlx5dr_ste_send_info *ste_info;
struct mlx5dr_htbl_connect_info info;
struct mlx5dr_domain_rx_tx *nic_dmn;
u8 formatted_ste[DR_STE_SIZE] = {};
LIST_HEAD(rehash_table_send_list);
struct mlx5dr_ste *ste_to_update;
struct mlx5dr_ste_htbl *new_htbl;
int err;
nic_matcher = nic_rule->nic_matcher;
nic_dmn = nic_matcher->nic_tbl->nic_dmn;
ste_info = kzalloc(sizeof(*ste_info), GFP_KERNEL);
if (!ste_info)
return NULL;
new_htbl = mlx5dr_ste_htbl_alloc(dmn->ste_icm_pool,
new_size,
cur_htbl->lu_type,
cur_htbl->byte_mask);
if (!new_htbl) {
mlx5dr_err(dmn, "Failed to allocate new hash table\n");
goto free_ste_info;
}
/* Write new table to HW */
info.type = CONNECT_MISS;
info.miss_icm_addr = nic_matcher->e_anchor->chunk->icm_addr;
mlx5dr_ste_set_formatted_ste(dmn->info.caps.gvmi,
nic_dmn,
new_htbl,
formatted_ste,
&info);
new_htbl->pointing_ste = cur_htbl->pointing_ste;
new_htbl->pointing_ste->next_htbl = new_htbl;
err = dr_rule_rehash_copy_htbl(matcher,
nic_matcher,
cur_htbl,
new_htbl,
&rehash_table_send_list);
if (err)
goto free_new_htbl;
if (mlx5dr_send_postsend_htbl(dmn, new_htbl, formatted_ste,
nic_matcher->ste_builder[ste_location - 1].bit_mask)) {
mlx5dr_err(dmn, "Failed writing table to HW\n");
goto free_new_htbl;
}
/* Writing to the hw is done in regular order of rehash_table_send_list,
* in order to have the origin data written before the miss address of
* collision entries, if exists.
*/
if (dr_rule_send_update_list(&rehash_table_send_list, dmn, false)) {
mlx5dr_err(dmn, "Failed updating table to HW\n");
goto free_ste_list;
}
/* Connect previous hash table to current */
if (ste_location == 1) {
/* The previous table is an anchor, anchors size is always one STE */
struct mlx5dr_ste_htbl *prev_htbl = cur_htbl->pointing_ste->htbl;
/* On matcher s_anchor we keep an extra refcount */
mlx5dr_htbl_get(new_htbl);
mlx5dr_htbl_put(cur_htbl);
nic_matcher->s_htbl = new_htbl;
/* It is safe to operate dr_ste_set_hit_addr on the hw_ste here
* (48B len) which works only on first 32B
*/
mlx5dr_ste_set_hit_addr(prev_htbl->ste_arr[0].hw_ste,
new_htbl->chunk->icm_addr,
new_htbl->chunk->num_of_entries);
ste_to_update = &prev_htbl->ste_arr[0];
} else {
mlx5dr_ste_set_hit_addr_by_next_htbl(cur_htbl->pointing_ste->hw_ste,
new_htbl);
ste_to_update = cur_htbl->pointing_ste;
}
mlx5dr_send_fill_and_append_ste_send_info(ste_to_update, DR_STE_SIZE_REDUCED,
0, ste_to_update->hw_ste, ste_info,
update_list, false);
return new_htbl;
free_ste_list:
/* Clean all ste_info's from the new table */
list_for_each_entry_safe(del_ste_info, tmp_ste_info,
&rehash_table_send_list, send_list) {
list_del(&del_ste_info->send_list);
kfree(del_ste_info);
}
free_new_htbl:
mlx5dr_ste_htbl_free(new_htbl);
free_ste_info:
kfree(ste_info);
mlx5dr_info(dmn, "Failed creating rehash table\n");
return NULL;
}
static struct mlx5dr_ste_htbl *dr_rule_rehash(struct mlx5dr_rule *rule,
struct mlx5dr_rule_rx_tx *nic_rule,
struct mlx5dr_ste_htbl *cur_htbl,
u8 ste_location,
struct list_head *update_list)
{
struct mlx5dr_domain *dmn = rule->matcher->tbl->dmn;
enum mlx5dr_icm_chunk_size new_size;
new_size = mlx5dr_icm_next_higher_chunk(cur_htbl->chunk_size);
new_size = min_t(u32, new_size, dmn->info.max_log_sw_icm_sz);
if (new_size == cur_htbl->chunk_size)
return NULL; /* Skip rehash, we already at the max size */
return dr_rule_rehash_htbl(rule, nic_rule, cur_htbl, ste_location,
update_list, new_size);
}
static struct mlx5dr_ste *
dr_rule_handle_collision(struct mlx5dr_matcher *matcher,
struct mlx5dr_matcher_rx_tx *nic_matcher,
struct mlx5dr_ste *ste,
u8 *hw_ste,
struct list_head *miss_list,
struct list_head *send_list)
{
struct mlx5dr_ste_send_info *ste_info;
struct mlx5dr_ste *new_ste;
ste_info = kzalloc(sizeof(*ste_info), GFP_KERNEL);
if (!ste_info)
return NULL;
new_ste = dr_rule_create_collision_entry(matcher, nic_matcher, hw_ste, ste);
if (!new_ste)
goto free_send_info;
if (dr_rule_append_to_miss_list(new_ste, miss_list, send_list)) {
mlx5dr_dbg(matcher->tbl->dmn, "Failed to update prev miss_list\n");
goto err_exit;
}
mlx5dr_send_fill_and_append_ste_send_info(new_ste, DR_STE_SIZE, 0, hw_ste,
ste_info, send_list, false);
ste->htbl->ctrl.num_of_collisions++;
ste->htbl->ctrl.num_of_valid_entries++;
return new_ste;
err_exit:
mlx5dr_ste_free(new_ste, matcher, nic_matcher);
free_send_info:
kfree(ste_info);
return NULL;
}
static void dr_rule_remove_action_members(struct mlx5dr_rule *rule)
{
struct mlx5dr_rule_action_member *action_mem;
struct mlx5dr_rule_action_member *tmp;
list_for_each_entry_safe(action_mem, tmp, &rule->rule_actions_list, list) {
list_del(&action_mem->list);
refcount_dec(&action_mem->action->refcount);
kvfree(action_mem);
}
}
static int dr_rule_add_action_members(struct mlx5dr_rule *rule,
size_t num_actions,
struct mlx5dr_action *actions[])
{
struct mlx5dr_rule_action_member *action_mem;
int i;
for (i = 0; i < num_actions; i++) {
action_mem = kvzalloc(sizeof(*action_mem), GFP_KERNEL);
if (!action_mem)
goto free_action_members;
action_mem->action = actions[i];
INIT_LIST_HEAD(&action_mem->list);
list_add_tail(&action_mem->list, &rule->rule_actions_list);
refcount_inc(&action_mem->action->refcount);
}
return 0;
free_action_members:
dr_rule_remove_action_members(rule);
return -ENOMEM;
}
/* While the pointer of ste is no longer valid, like while moving ste to be
* the first in the miss_list, and to be in the origin table,
* all rule-members that are attached to this ste should update their ste member
* to the new pointer
*/
void mlx5dr_rule_update_rule_member(struct mlx5dr_ste *ste,
struct mlx5dr_ste *new_ste)
{
struct mlx5dr_rule_member *rule_mem;
if (!list_empty(&ste->rule_list))
list_for_each_entry(rule_mem, &ste->rule_list, use_ste_list)
rule_mem->ste = new_ste;
}
static void dr_rule_clean_rule_members(struct mlx5dr_rule *rule,
struct mlx5dr_rule_rx_tx *nic_rule)
{
struct mlx5dr_rule_member *rule_mem;
struct mlx5dr_rule_member *tmp_mem;
if (list_empty(&nic_rule->rule_members_list))
return;
list_for_each_entry_safe(rule_mem, tmp_mem, &nic_rule->rule_members_list, list) {
list_del(&rule_mem->list);
list_del(&rule_mem->use_ste_list);
mlx5dr_ste_put(rule_mem->ste, rule->matcher, nic_rule->nic_matcher);
kvfree(rule_mem);
}
}
static bool dr_rule_need_enlarge_hash(struct mlx5dr_ste_htbl *htbl,
struct mlx5dr_domain *dmn,
struct mlx5dr_domain_rx_tx *nic_dmn)
{
struct mlx5dr_ste_htbl_ctrl *ctrl = &htbl->ctrl;
if (dmn->info.max_log_sw_icm_sz <= htbl->chunk_size)
return false;
if (!ctrl->may_grow)
return false;
if (ctrl->num_of_collisions >= ctrl->increase_threshold &&
(ctrl->num_of_valid_entries - ctrl->num_of_collisions) >= ctrl->increase_threshold)
return true;
return false;
}
static int dr_rule_add_member(struct mlx5dr_rule_rx_tx *nic_rule,
struct mlx5dr_ste *ste)
{
struct mlx5dr_rule_member *rule_mem;
rule_mem = kvzalloc(sizeof(*rule_mem), GFP_KERNEL);
if (!rule_mem)
return -ENOMEM;
rule_mem->ste = ste;
list_add_tail(&rule_mem->list, &nic_rule->rule_members_list);
list_add_tail(&rule_mem->use_ste_list, &ste->rule_list);
return 0;
}
static int dr_rule_handle_action_stes(struct mlx5dr_rule *rule,
struct mlx5dr_rule_rx_tx *nic_rule,
struct list_head *send_ste_list,
struct mlx5dr_ste *last_ste,
u8 *hw_ste_arr,
u32 new_hw_ste_arr_sz)
{
struct mlx5dr_matcher_rx_tx *nic_matcher = nic_rule->nic_matcher;
struct mlx5dr_ste_send_info *ste_info_arr[DR_ACTION_MAX_STES];
u8 num_of_builders = nic_matcher->num_of_builders;
struct mlx5dr_matcher *matcher = rule->matcher;
u8 *curr_hw_ste, *prev_hw_ste;
struct mlx5dr_ste *action_ste;
int i, k, ret;
/* Two cases:
* 1. num_of_builders is equal to new_hw_ste_arr_sz, the action in the ste
* 2. num_of_builders is less then new_hw_ste_arr_sz, new ste was added
* to support the action.
*/
if (num_of_builders == new_hw_ste_arr_sz)
return 0;
for (i = num_of_builders, k = 0; i < new_hw_ste_arr_sz; i++, k++) {
curr_hw_ste = hw_ste_arr + i * DR_STE_SIZE;
prev_hw_ste = (i == 0) ? curr_hw_ste : hw_ste_arr + ((i - 1) * DR_STE_SIZE);
action_ste = dr_rule_create_collision_htbl(matcher,
nic_matcher,
curr_hw_ste);
if (!action_ste)
return -ENOMEM;
mlx5dr_ste_get(action_ste);
/* While free ste we go over the miss list, so add this ste to the list */
list_add_tail(&action_ste->miss_list_node,
mlx5dr_ste_get_miss_list(action_ste));
ste_info_arr[k] = kzalloc(sizeof(*ste_info_arr[k]),
GFP_KERNEL);
if (!ste_info_arr[k])
goto err_exit;
/* Point current ste to the new action */
mlx5dr_ste_set_hit_addr_by_next_htbl(prev_hw_ste, action_ste->htbl);
ret = dr_rule_add_member(nic_rule, action_ste);
if (ret) {
mlx5dr_dbg(matcher->tbl->dmn, "Failed adding rule member\n");
goto free_ste_info;
}
mlx5dr_send_fill_and_append_ste_send_info(action_ste, DR_STE_SIZE, 0,
curr_hw_ste,
ste_info_arr[k],
send_ste_list, false);
}
return 0;
free_ste_info:
kfree(ste_info_arr[k]);
err_exit:
mlx5dr_ste_put(action_ste, matcher, nic_matcher);
return -ENOMEM;
}
static int dr_rule_handle_empty_entry(struct mlx5dr_matcher *matcher,
struct mlx5dr_matcher_rx_tx *nic_matcher,
struct mlx5dr_ste_htbl *cur_htbl,
struct mlx5dr_ste *ste,
u8 ste_location,
u8 *hw_ste,
struct list_head *miss_list,
struct list_head *send_list)
{
struct mlx5dr_ste_send_info *ste_info;
/* Take ref on table, only on first time this ste is used */
mlx5dr_htbl_get(cur_htbl);
/* new entry -> new branch */
list_add_tail(&ste->miss_list_node, miss_list);
mlx5dr_ste_set_miss_addr(hw_ste, nic_matcher->e_anchor->chunk->icm_addr);
ste->ste_chain_location = ste_location;
ste_info = kzalloc(sizeof(*ste_info), GFP_KERNEL);
if (!ste_info)
goto clean_ste_setting;
if (mlx5dr_ste_create_next_htbl(matcher,
nic_matcher,
ste,
hw_ste,
DR_CHUNK_SIZE_1)) {
mlx5dr_dbg(matcher->tbl->dmn, "Failed allocating table\n");
goto clean_ste_info;
}
cur_htbl->ctrl.num_of_valid_entries++;
mlx5dr_send_fill_and_append_ste_send_info(ste, DR_STE_SIZE, 0, hw_ste,
ste_info, send_list, false);
return 0;
clean_ste_info:
kfree(ste_info);
clean_ste_setting:
list_del_init(&ste->miss_list_node);
mlx5dr_htbl_put(cur_htbl);
return -ENOMEM;
}
static struct mlx5dr_ste *
dr_rule_handle_ste_branch(struct mlx5dr_rule *rule,
struct mlx5dr_rule_rx_tx *nic_rule,
struct list_head *send_ste_list,
struct mlx5dr_ste_htbl *cur_htbl,
u8 *hw_ste,
u8 ste_location,
struct mlx5dr_ste_htbl **put_htbl)
{
struct mlx5dr_matcher *matcher = rule->matcher;
struct mlx5dr_domain *dmn = matcher->tbl->dmn;
struct mlx5dr_matcher_rx_tx *nic_matcher;
struct mlx5dr_domain_rx_tx *nic_dmn;
struct mlx5dr_ste_htbl *new_htbl;
struct mlx5dr_ste *matched_ste;
struct list_head *miss_list;
bool skip_rehash = false;
struct mlx5dr_ste *ste;
int index;
nic_matcher = nic_rule->nic_matcher;
nic_dmn = nic_matcher->nic_tbl->nic_dmn;
again:
index = mlx5dr_ste_calc_hash_index(hw_ste, cur_htbl);
miss_list = &cur_htbl->chunk->miss_list[index];
ste = &cur_htbl->ste_arr[index];
if (mlx5dr_ste_not_used_ste(ste)) {
if (dr_rule_handle_empty_entry(matcher, nic_matcher, cur_htbl,
ste, ste_location,
hw_ste, miss_list,
send_ste_list))
return NULL;
} else {
/* Hash table index in use, check if this ste is in the miss list */
matched_ste = dr_rule_find_ste_in_miss_list(miss_list, hw_ste);
if (matched_ste) {
/* If it is last STE in the chain, and has the same tag
* it means that all the previous stes are the same,
* if so, this rule is duplicated.
*/
if (mlx5dr_ste_is_last_in_rule(nic_matcher,
matched_ste->ste_chain_location)) {
mlx5dr_info(dmn, "Duplicate rule inserted, aborting!!\n");
return NULL;
}
return matched_ste;
}
if (!skip_rehash && dr_rule_need_enlarge_hash(cur_htbl, dmn, nic_dmn)) {
/* Hash table index in use, try to resize of the hash */
skip_rehash = true;
/* Hold the table till we update.
* Release in dr_rule_create_rule()
*/
*put_htbl = cur_htbl;
mlx5dr_htbl_get(cur_htbl);
new_htbl = dr_rule_rehash(rule, nic_rule, cur_htbl,
ste_location, send_ste_list);
if (!new_htbl) {
mlx5dr_htbl_put(cur_htbl);
mlx5dr_info(dmn, "failed creating rehash table, htbl-log_size: %d\n",
cur_htbl->chunk_size);
} else {
cur_htbl = new_htbl;
}
goto again;
} else {
/* Hash table index in use, add another collision (miss) */
ste = dr_rule_handle_collision(matcher,
nic_matcher,
ste,
hw_ste,
miss_list,
send_ste_list);
if (!ste) {
mlx5dr_dbg(dmn, "failed adding collision entry, index: %d\n",
index);
return NULL;
}
}
}
return ste;
}
static bool dr_rule_cmp_value_to_mask(u8 *mask, u8 *value,
u32 s_idx, u32 e_idx)
{
u32 i;
for (i = s_idx; i < e_idx; i++) {
if (value[i] & ~mask[i]) {
pr_info("Rule parameters contains a value not specified by mask\n");
return false;
}
}
return true;
}
static bool dr_rule_verify(struct mlx5dr_matcher *matcher,
struct mlx5dr_match_parameters *value,
struct mlx5dr_match_param *param)
{
u8 match_criteria = matcher->match_criteria;
size_t value_size = value->match_sz;
u8 *mask_p = (u8 *)&matcher->mask;
u8 *param_p = (u8 *)param;
u32 s_idx, e_idx;
if (!value_size ||
(value_size > sizeof(struct mlx5dr_match_param) ||
(value_size % sizeof(u32)))) {
mlx5dr_dbg(matcher->tbl->dmn, "Rule parameters length is incorrect\n");
return false;
}
mlx5dr_ste_copy_param(matcher->match_criteria, param, value);
if (match_criteria & DR_MATCHER_CRITERIA_OUTER) {
s_idx = offsetof(struct mlx5dr_match_param, outer);
e_idx = min(s_idx + sizeof(param->outer), value_size);
if (!dr_rule_cmp_value_to_mask(mask_p, param_p, s_idx, e_idx)) {
mlx5dr_dbg(matcher->tbl->dmn, "Rule outer parameters contains a value not specified by mask\n");
return false;
}
}
if (match_criteria & DR_MATCHER_CRITERIA_MISC) {
s_idx = offsetof(struct mlx5dr_match_param, misc);
e_idx = min(s_idx + sizeof(param->misc), value_size);
if (!dr_rule_cmp_value_to_mask(mask_p, param_p, s_idx, e_idx)) {
mlx5dr_dbg(matcher->tbl->dmn, "Rule misc parameters contains a value not specified by mask\n");
return false;
}
}
if (match_criteria & DR_MATCHER_CRITERIA_INNER) {
s_idx = offsetof(struct mlx5dr_match_param, inner);
e_idx = min(s_idx + sizeof(param->inner), value_size);
if (!dr_rule_cmp_value_to_mask(mask_p, param_p, s_idx, e_idx)) {
mlx5dr_dbg(matcher->tbl->dmn, "Rule inner parameters contains a value not specified by mask\n");
return false;
}
}
if (match_criteria & DR_MATCHER_CRITERIA_MISC2) {
s_idx = offsetof(struct mlx5dr_match_param, misc2);
e_idx = min(s_idx + sizeof(param->misc2), value_size);
if (!dr_rule_cmp_value_to_mask(mask_p, param_p, s_idx, e_idx)) {
mlx5dr_dbg(matcher->tbl->dmn, "Rule misc2 parameters contains a value not specified by mask\n");
return false;
}
}
if (match_criteria & DR_MATCHER_CRITERIA_MISC3) {
s_idx = offsetof(struct mlx5dr_match_param, misc3);
e_idx = min(s_idx + sizeof(param->misc3), value_size);
if (!dr_rule_cmp_value_to_mask(mask_p, param_p, s_idx, e_idx)) {
mlx5dr_dbg(matcher->tbl->dmn, "Rule misc3 parameters contains a value not specified by mask\n");
return false;
}
}
return true;
}
static int dr_rule_destroy_rule_nic(struct mlx5dr_rule *rule,
struct mlx5dr_rule_rx_tx *nic_rule)
{
dr_rule_clean_rule_members(rule, nic_rule);
return 0;
}
static int dr_rule_destroy_rule_fdb(struct mlx5dr_rule *rule)
{
dr_rule_destroy_rule_nic(rule, &rule->rx);
dr_rule_destroy_rule_nic(rule, &rule->tx);
return 0;
}
static int dr_rule_destroy_rule(struct mlx5dr_rule *rule)
{
struct mlx5dr_domain *dmn = rule->matcher->tbl->dmn;
switch (dmn->type) {
case MLX5DR_DOMAIN_TYPE_NIC_RX:
dr_rule_destroy_rule_nic(rule, &rule->rx);
break;
case MLX5DR_DOMAIN_TYPE_NIC_TX:
dr_rule_destroy_rule_nic(rule, &rule->tx);
break;
case MLX5DR_DOMAIN_TYPE_FDB:
dr_rule_destroy_rule_fdb(rule);
break;
default:
return -EINVAL;
}
dr_rule_remove_action_members(rule);
kfree(rule);
return 0;
}
static bool dr_rule_is_ipv6(struct mlx5dr_match_param *param)
{
return (param->outer.ip_version == 6 ||
param->inner.ip_version == 6 ||
param->outer.ethertype == ETH_P_IPV6 ||
param->inner.ethertype == ETH_P_IPV6);
}
static bool dr_rule_skip(enum mlx5dr_domain_type domain,
enum mlx5dr_ste_entry_type ste_type,
struct mlx5dr_match_param *mask,
struct mlx5dr_match_param *value)
{
if (domain != MLX5DR_DOMAIN_TYPE_FDB)
return false;
if (mask->misc.source_port) {
if (ste_type == MLX5DR_STE_TYPE_RX)
if (value->misc.source_port != WIRE_PORT)
return true;
if (ste_type == MLX5DR_STE_TYPE_TX)
if (value->misc.source_port == WIRE_PORT)
return true;
}
/* Metadata C can be used to describe the source vport */
if (mask->misc2.metadata_reg_c_0) {
if (ste_type == MLX5DR_STE_TYPE_RX)
if ((value->misc2.metadata_reg_c_0 & WIRE_PORT) != WIRE_PORT)
return true;
if (ste_type == MLX5DR_STE_TYPE_TX)
if ((value->misc2.metadata_reg_c_0 & WIRE_PORT) == WIRE_PORT)
return true;
}
return false;
}
static int
dr_rule_create_rule_nic(struct mlx5dr_rule *rule,
struct mlx5dr_rule_rx_tx *nic_rule,
struct mlx5dr_match_param *param,
size_t num_actions,
struct mlx5dr_action *actions[])
{
struct mlx5dr_ste_send_info *ste_info, *tmp_ste_info;
struct mlx5dr_matcher *matcher = rule->matcher;
struct mlx5dr_domain *dmn = matcher->tbl->dmn;
struct mlx5dr_matcher_rx_tx *nic_matcher;
struct mlx5dr_domain_rx_tx *nic_dmn;
struct mlx5dr_ste_htbl *htbl = NULL;
struct mlx5dr_ste_htbl *cur_htbl;
struct mlx5dr_ste *ste = NULL;
LIST_HEAD(send_ste_list);
u8 *hw_ste_arr = NULL;
u32 new_hw_ste_arr_sz;
int ret, i;
nic_matcher = nic_rule->nic_matcher;
nic_dmn = nic_matcher->nic_tbl->nic_dmn;
INIT_LIST_HEAD(&nic_rule->rule_members_list);
if (dr_rule_skip(dmn->type, nic_dmn->ste_type, &matcher->mask, param))
return 0;
ret = mlx5dr_matcher_select_builders(matcher,
nic_matcher,
dr_rule_is_ipv6(param));
if (ret)
goto out_err;
hw_ste_arr = kzalloc(DR_RULE_MAX_STE_CHAIN * DR_STE_SIZE, GFP_KERNEL);
if (!hw_ste_arr) {
ret = -ENOMEM;
goto out_err;
}
/* Set the tag values inside the ste array */
ret = mlx5dr_ste_build_ste_arr(matcher, nic_matcher, param, hw_ste_arr);
if (ret)
goto free_hw_ste;
/* Set the actions values/addresses inside the ste array */
ret = mlx5dr_actions_build_ste_arr(matcher, nic_matcher, actions,
num_actions, hw_ste_arr,
&new_hw_ste_arr_sz);
if (ret)
goto free_hw_ste;
cur_htbl = nic_matcher->s_htbl;
/* Go over the array of STEs, and build dr_ste accordingly.
* The loop is over only the builders which are equal or less to the
* number of stes, in case we have actions that lives in other stes.
*/
for (i = 0; i < nic_matcher->num_of_builders; i++) {
/* Calculate CRC and keep new ste entry */
u8 *cur_hw_ste_ent = hw_ste_arr + (i * DR_STE_SIZE);
ste = dr_rule_handle_ste_branch(rule,
nic_rule,
&send_ste_list,
cur_htbl,
cur_hw_ste_ent,
i + 1,
&htbl);
if (!ste) {
mlx5dr_err(dmn, "Failed creating next branch\n");
ret = -ENOENT;
goto free_rule;
}
cur_htbl = ste->next_htbl;
/* Keep all STEs in the rule struct */
ret = dr_rule_add_member(nic_rule, ste);
if (ret) {
mlx5dr_dbg(dmn, "Failed adding rule member index %d\n", i);
goto free_ste;
}
mlx5dr_ste_get(ste);
}
/* Connect actions */
ret = dr_rule_handle_action_stes(rule, nic_rule, &send_ste_list,
ste, hw_ste_arr, new_hw_ste_arr_sz);
if (ret) {
mlx5dr_dbg(dmn, "Failed apply actions\n");
goto free_rule;
}
ret = dr_rule_send_update_list(&send_ste_list, dmn, true);
if (ret) {
mlx5dr_err(dmn, "Failed sending ste!\n");
goto free_rule;
}
if (htbl)
mlx5dr_htbl_put(htbl);
return 0;
free_ste:
mlx5dr_ste_put(ste, matcher, nic_matcher);
free_rule:
dr_rule_clean_rule_members(rule, nic_rule);
/* Clean all ste_info's */
list_for_each_entry_safe(ste_info, tmp_ste_info, &send_ste_list, send_list) {
list_del(&ste_info->send_list);
kfree(ste_info);
}
free_hw_ste:
kfree(hw_ste_arr);
out_err:
return ret;
}
static int
dr_rule_create_rule_fdb(struct mlx5dr_rule *rule,
struct mlx5dr_match_param *param,
size_t num_actions,
struct mlx5dr_action *actions[])
{
struct mlx5dr_match_param copy_param = {};
int ret;
/* Copy match_param since they will be consumed during the first
* nic_rule insertion.
*/
memcpy(&copy_param, param, sizeof(struct mlx5dr_match_param));
ret = dr_rule_create_rule_nic(rule, &rule->rx, param,
num_actions, actions);
if (ret)
return ret;
ret = dr_rule_create_rule_nic(rule, &rule->tx, &copy_param,
num_actions, actions);
if (ret)
goto destroy_rule_nic_rx;
return 0;
destroy_rule_nic_rx:
dr_rule_destroy_rule_nic(rule, &rule->rx);
return ret;
}
static struct mlx5dr_rule *
dr_rule_create_rule(struct mlx5dr_matcher *matcher,
struct mlx5dr_match_parameters *value,
size_t num_actions,
struct mlx5dr_action *actions[])
{
struct mlx5dr_domain *dmn = matcher->tbl->dmn;
struct mlx5dr_match_param param = {};
struct mlx5dr_rule *rule;
int ret;
if (!dr_rule_verify(matcher, value, &param))
return NULL;
rule = kzalloc(sizeof(*rule), GFP_KERNEL);
if (!rule)
return NULL;
rule->matcher = matcher;
INIT_LIST_HEAD(&rule->rule_actions_list);
ret = dr_rule_add_action_members(rule, num_actions, actions);
if (ret)
goto free_rule;
switch (dmn->type) {
case MLX5DR_DOMAIN_TYPE_NIC_RX:
rule->rx.nic_matcher = &matcher->rx;
ret = dr_rule_create_rule_nic(rule, &rule->rx, &param,
num_actions, actions);
break;
case MLX5DR_DOMAIN_TYPE_NIC_TX:
rule->tx.nic_matcher = &matcher->tx;
ret = dr_rule_create_rule_nic(rule, &rule->tx, &param,
num_actions, actions);
break;
case MLX5DR_DOMAIN_TYPE_FDB:
rule->rx.nic_matcher = &matcher->rx;
rule->tx.nic_matcher = &matcher->tx;
ret = dr_rule_create_rule_fdb(rule, &param,
num_actions, actions);
break;
default:
ret = -EINVAL;
break;
}
if (ret)
goto remove_action_members;
return rule;
remove_action_members:
dr_rule_remove_action_members(rule);
free_rule:
kfree(rule);
mlx5dr_info(dmn, "Failed creating rule\n");
return NULL;
}
struct mlx5dr_rule *mlx5dr_rule_create(struct mlx5dr_matcher *matcher,
struct mlx5dr_match_parameters *value,
size_t num_actions,
struct mlx5dr_action *actions[])
{
struct mlx5dr_rule *rule;
mutex_lock(&matcher->tbl->dmn->mutex);
refcount_inc(&matcher->refcount);
rule = dr_rule_create_rule(matcher, value, num_actions, actions);
if (!rule)
refcount_dec(&matcher->refcount);
mutex_unlock(&matcher->tbl->dmn->mutex);
return rule;
}
int mlx5dr_rule_destroy(struct mlx5dr_rule *rule)
{
struct mlx5dr_matcher *matcher = rule->matcher;
struct mlx5dr_table *tbl = rule->matcher->tbl;
int ret;
mutex_lock(&tbl->dmn->mutex);
ret = dr_rule_destroy_rule(rule);
mutex_unlock(&tbl->dmn->mutex);
if (!ret)
refcount_dec(&matcher->refcount);
return ret;
}
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