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-rw-r--r--drivers/net/ethernet/mellanox/mlx5/core/Makefile2
-rw-r--r--drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.c16
-rw-r--r--drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c31
-rw-r--r--drivers/net/ethernet/mellanox/mlx5/core/en_rep.c1
-rw-r--r--drivers/net/ethernet/mellanox/mlx5/core/en_tc.c12
-rw-r--r--drivers/net/ethernet/mellanox/mlx5/core/esw/chains.c944
-rw-r--r--drivers/net/ethernet/mellanox/mlx5/core/esw/chains.h68
-rw-r--r--drivers/net/ethernet/mellanox/mlx5/core/eswitch.h12
-rw-r--r--drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c159
-rw-r--r--drivers/net/ethernet/mellanox/mlx5/core/lib/fs_chains.c902
-rw-r--r--drivers/net/ethernet/mellanox/mlx5/core/lib/fs_chains.h93
11 files changed, 1174 insertions, 1066 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/Makefile b/drivers/net/ethernet/mellanox/mlx5/core/Makefile
index 0b3eaa102751..9826a041e407 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/Makefile
+++ b/drivers/net/ethernet/mellanox/mlx5/core/Makefile
@@ -37,7 +37,7 @@ mlx5_core-$(CONFIG_PCI_HYPERV_INTERFACE) += en/hv_vhca_stats.o
mlx5_core-$(CONFIG_MLX5_ESWITCH) += lag_mp.o lib/geneve.o lib/port_tun.o \
en_rep.o en/rep/bond.o en/mod_hdr.o
mlx5_core-$(CONFIG_MLX5_CLS_ACT) += en_tc.o en/rep/tc.o en/rep/neigh.o \
- en/mapping.o esw/chains.o en/tc_tun.o \
+ en/mapping.o lib/fs_chains.o en/tc_tun.o \
en/tc_tun_vxlan.o en/tc_tun_gre.o en/tc_tun_geneve.o \
en/tc_tun_mplsoudp.o diag/en_tc_tracepoint.o
mlx5_core-$(CONFIG_MLX5_TC_CT) += en/tc_ct.o
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.c
index 79cc42d88eec..771e73f211fb 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/rep/tc.c
@@ -12,7 +12,7 @@
#include "neigh.h"
#include "en_rep.h"
#include "eswitch.h"
-#include "esw/chains.h"
+#include "lib/fs_chains.h"
#include "en/tc_ct.h"
#include "en/mapping.h"
#include "en/tc_tun.h"
@@ -191,7 +191,7 @@ static int mlx5e_rep_setup_ft_cb(enum tc_setup_type type, void *type_data,
case TC_SETUP_CLSFLOWER:
memcpy(&tmp, f, sizeof(*f));
- if (!mlx5_esw_chains_prios_supported(esw))
+ if (!mlx5_chains_prios_supported(esw_chains(esw)))
return -EOPNOTSUPP;
/* Re-use tc offload path by moving the ft flow to the
@@ -203,12 +203,12 @@ static int mlx5e_rep_setup_ft_cb(enum tc_setup_type type, void *type_data,
*
* We only support chain 0 of FT offload.
*/
- if (tmp.common.prio >= mlx5_esw_chains_get_prio_range(esw))
+ if (tmp.common.prio >= mlx5_chains_get_prio_range(esw_chains(esw)))
return -EOPNOTSUPP;
if (tmp.common.chain_index != 0)
return -EOPNOTSUPP;
- tmp.common.chain_index = mlx5_esw_chains_get_ft_chain(esw);
+ tmp.common.chain_index = mlx5_chains_get_nf_ft_chain(esw_chains(esw));
tmp.common.prio++;
err = mlx5e_rep_setup_tc_cls_flower(priv, &tmp, flags);
memcpy(&f->stats, &tmp.stats, sizeof(f->stats));
@@ -378,12 +378,12 @@ static int mlx5e_rep_indr_setup_ft_cb(enum tc_setup_type type,
*
* We only support chain 0 of FT offload.
*/
- if (!mlx5_esw_chains_prios_supported(esw) ||
- tmp.common.prio >= mlx5_esw_chains_get_prio_range(esw) ||
+ if (!mlx5_chains_prios_supported(esw_chains(esw)) ||
+ tmp.common.prio >= mlx5_chains_get_prio_range(esw_chains(esw)) ||
tmp.common.chain_index)
return -EOPNOTSUPP;
- tmp.common.chain_index = mlx5_esw_chains_get_ft_chain(esw);
+ tmp.common.chain_index = mlx5_chains_get_nf_ft_chain(esw_chains(esw));
tmp.common.prio++;
err = mlx5e_rep_indr_offload(priv->netdev, &tmp, priv, flags);
memcpy(&f->stats, &tmp.stats, sizeof(f->stats));
@@ -626,7 +626,7 @@ bool mlx5e_rep_tc_update_skb(struct mlx5_cqe64 *cqe,
priv = netdev_priv(skb->dev);
esw = priv->mdev->priv.eswitch;
- err = mlx5_eswitch_get_chain_for_tag(esw, reg_c0, &chain);
+ err = mlx5_get_chain_for_tag(esw_chains(esw), reg_c0, &chain);
if (err) {
netdev_dbg(priv->netdev,
"Couldn't find chain for chain tag: %d, err: %d\n",
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c
index bc5f72ec3623..579f888c22ab 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_ct.c
@@ -14,7 +14,7 @@
#include <linux/workqueue.h>
#include <linux/xarray.h>
-#include "esw/chains.h"
+#include "lib/fs_chains.h"
#include "en/tc_ct.h"
#include "en/mod_hdr.h"
#include "en/mapping.h"
@@ -1485,8 +1485,8 @@ __mlx5_tc_ct_flow_offload(struct mlx5e_priv *priv,
* don't go though all prios of this chain as normal tc rules
* miss.
*/
- err = mlx5_esw_chains_get_chain_mapping(esw, attr->chain,
- &chain_mapping);
+ err = mlx5_chains_get_chain_mapping(esw_chains(esw), attr->chain,
+ &chain_mapping);
if (err) {
ct_dbg("Failed to get chain register mapping for chain");
goto err_get_chain;
@@ -1582,7 +1582,7 @@ err_insert_post_ct:
mlx5_modify_header_dealloc(priv->mdev, pre_ct_attr->modify_hdr);
err_mapping:
dealloc_mod_hdr_actions(&pre_mod_acts);
- mlx5_esw_chains_put_chain_mapping(esw, ct_flow->chain_mapping);
+ mlx5_chains_put_chain_mapping(esw_chains(esw), ct_flow->chain_mapping);
err_get_chain:
idr_remove(&ct_priv->fte_ids, fte_id);
err_idr:
@@ -1694,7 +1694,7 @@ __mlx5_tc_ct_delete_flow(struct mlx5_tc_ct_priv *ct_priv,
if (ct_flow->post_ct_rule) {
mlx5_eswitch_del_offloaded_rule(esw, ct_flow->post_ct_rule,
&ct_flow->post_ct_attr);
- mlx5_esw_chains_put_chain_mapping(esw, ct_flow->chain_mapping);
+ mlx5_chains_put_chain_mapping(esw_chains(esw), ct_flow->chain_mapping);
idr_remove(&ct_priv->fte_ids, ct_flow->fte_id);
mlx5_tc_ct_del_ft_cb(ct_priv, ct_flow->ft);
}
@@ -1817,14 +1817,14 @@ mlx5_tc_ct_init(struct mlx5_rep_uplink_priv *uplink_priv)
ct_priv->esw = esw;
ct_priv->netdev = rpriv->netdev;
- ct_priv->ct = mlx5_esw_chains_create_global_table(esw);
+ ct_priv->ct = mlx5_chains_create_global_table(esw_chains(esw));
if (IS_ERR(ct_priv->ct)) {
err = PTR_ERR(ct_priv->ct);
mlx5_tc_ct_init_err(rpriv, "failed to create ct table", err);
goto err_ct_tbl;
}
- ct_priv->ct_nat = mlx5_esw_chains_create_global_table(esw);
+ ct_priv->ct_nat = mlx5_chains_create_global_table(esw_chains(esw));
if (IS_ERR(ct_priv->ct_nat)) {
err = PTR_ERR(ct_priv->ct_nat);
mlx5_tc_ct_init_err(rpriv, "failed to create ct nat table",
@@ -1832,7 +1832,7 @@ mlx5_tc_ct_init(struct mlx5_rep_uplink_priv *uplink_priv)
goto err_ct_nat_tbl;
}
- ct_priv->post_ct = mlx5_esw_chains_create_global_table(esw);
+ ct_priv->post_ct = mlx5_chains_create_global_table(esw_chains(esw));
if (IS_ERR(ct_priv->post_ct)) {
err = PTR_ERR(ct_priv->post_ct);
mlx5_tc_ct_init_err(rpriv, "failed to create post ct table",
@@ -1852,9 +1852,9 @@ mlx5_tc_ct_init(struct mlx5_rep_uplink_priv *uplink_priv)
return 0;
err_post_ct_tbl:
- mlx5_esw_chains_destroy_global_table(esw, ct_priv->ct_nat);
+ mlx5_chains_destroy_global_table(esw_chains(esw), ct_priv->ct_nat);
err_ct_nat_tbl:
- mlx5_esw_chains_destroy_global_table(esw, ct_priv->ct);
+ mlx5_chains_destroy_global_table(esw_chains(esw), ct_priv->ct);
err_ct_tbl:
mapping_destroy(ct_priv->labels_mapping);
err_mapping_labels:
@@ -1871,13 +1871,18 @@ void
mlx5_tc_ct_clean(struct mlx5_rep_uplink_priv *uplink_priv)
{
struct mlx5_tc_ct_priv *ct_priv = uplink_priv->ct_priv;
+ struct mlx5_fs_chains *chains;
+ struct mlx5_eswitch *esw;
if (!ct_priv)
return;
- mlx5_esw_chains_destroy_global_table(ct_priv->esw, ct_priv->post_ct);
- mlx5_esw_chains_destroy_global_table(ct_priv->esw, ct_priv->ct_nat);
- mlx5_esw_chains_destroy_global_table(ct_priv->esw, ct_priv->ct);
+ esw = ct_priv->esw;
+ chains = esw_chains(esw);
+
+ mlx5_chains_destroy_global_table(chains, ct_priv->post_ct);
+ mlx5_chains_destroy_global_table(chains, ct_priv->ct_nat);
+ mlx5_chains_destroy_global_table(chains, ct_priv->ct);
mapping_destroy(ct_priv->zone_mapping);
mapping_destroy(ct_priv->labels_mapping);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
index 97ba2da56cf9..9f5c97d22af4 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
@@ -39,7 +39,6 @@
#include <net/ipv6_stubs.h>
#include "eswitch.h"
-#include "esw/chains.h"
#include "en.h"
#include "en_rep.h"
#include "en/txrx.h"
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
index 28053c3c4380..557769c16393 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -57,7 +57,6 @@
#include "en/rep/neigh.h"
#include "en_tc.h"
#include "eswitch.h"
-#include "esw/chains.h"
#include "fs_core.h"
#include "en/port.h"
#include "en/tc_tun.h"
@@ -66,6 +65,7 @@
#include "en/mod_hdr.h"
#include "lib/devcom.h"
#include "lib/geneve.h"
+#include "lib/fs_chains.h"
#include "diag/en_tc_tracepoint.h"
#define MLX5_MH_ACT_SZ MLX5_UN_SZ_BYTES(set_add_copy_action_in_auto)
@@ -1180,7 +1180,7 @@ mlx5e_tc_add_fdb_flow(struct mlx5e_priv *priv,
int err = 0;
int out_index;
- if (!mlx5_esw_chains_prios_supported(esw) && attr->prio != 1) {
+ if (!mlx5_chains_prios_supported(esw_chains(esw)) && attr->prio != 1) {
NL_SET_ERR_MSG_MOD(extack,
"E-switch priorities unsupported, upgrade FW");
return -EOPNOTSUPP;
@@ -1191,14 +1191,14 @@ mlx5e_tc_add_fdb_flow(struct mlx5e_priv *priv,
* FDB_FT_CHAIN which is outside tc range.
* See mlx5e_rep_setup_ft_cb().
*/
- max_chain = mlx5_esw_chains_get_chain_range(esw);
+ max_chain = mlx5_chains_get_chain_range(esw_chains(esw));
if (!mlx5e_is_ft_flow(flow) && attr->chain > max_chain) {
NL_SET_ERR_MSG_MOD(extack,
"Requested chain is out of supported range");
return -EOPNOTSUPP;
}
- max_prio = mlx5_esw_chains_get_prio_range(esw);
+ max_prio = mlx5_chains_get_prio_range(esw_chains(esw));
if (attr->prio > max_prio) {
NL_SET_ERR_MSG_MOD(extack,
"Requested priority is out of supported range");
@@ -3845,7 +3845,7 @@ static int mlx5_validate_goto_chain(struct mlx5_eswitch *esw,
u32 actions,
struct netlink_ext_ack *extack)
{
- u32 max_chain = mlx5_esw_chains_get_chain_range(esw);
+ u32 max_chain = mlx5_chains_get_chain_range(esw_chains(esw));
struct mlx5_esw_flow_attr *attr = flow->esw_attr;
bool ft_flow = mlx5e_is_ft_flow(flow);
u32 dest_chain = act->chain_index;
@@ -3855,7 +3855,7 @@ static int mlx5_validate_goto_chain(struct mlx5_eswitch *esw,
return -EOPNOTSUPP;
}
- if (!mlx5_esw_chains_backwards_supported(esw) &&
+ if (!mlx5_chains_backwards_supported(esw_chains(esw)) &&
dest_chain <= attr->chain) {
NL_SET_ERR_MSG_MOD(extack,
"Goto lower numbered chain isn't supported");
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;
-}
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/esw/chains.h b/drivers/net/ethernet/mellanox/mlx5/core/esw/chains.h
deleted file mode 100644
index 7679ac359e31..000000000000
--- a/drivers/net/ethernet/mellanox/mlx5/core/esw/chains.h
+++ /dev/null
@@ -1,68 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
-/* Copyright (c) 2020 Mellanox Technologies. */
-
-#ifndef __ML5_ESW_CHAINS_H__
-#define __ML5_ESW_CHAINS_H__
-
-#include "eswitch.h"
-
-#if IS_ENABLED(CONFIG_MLX5_CLS_ACT)
-
-bool
-mlx5_esw_chains_prios_supported(struct mlx5_eswitch *esw);
-bool
-mlx5_esw_chains_backwards_supported(struct mlx5_eswitch *esw);
-u32
-mlx5_esw_chains_get_prio_range(struct mlx5_eswitch *esw);
-u32
-mlx5_esw_chains_get_chain_range(struct mlx5_eswitch *esw);
-u32
-mlx5_esw_chains_get_ft_chain(struct mlx5_eswitch *esw);
-
-struct mlx5_flow_table *
-mlx5_esw_chains_get_table(struct mlx5_eswitch *esw, u32 chain, u32 prio,
- u32 level);
-void
-mlx5_esw_chains_put_table(struct mlx5_eswitch *esw, u32 chain, u32 prio,
- u32 level);
-
-struct mlx5_flow_table *
-mlx5_esw_chains_get_tc_end_ft(struct mlx5_eswitch *esw);
-
-struct mlx5_flow_table *
-mlx5_esw_chains_create_global_table(struct mlx5_eswitch *esw);
-void
-mlx5_esw_chains_destroy_global_table(struct mlx5_eswitch *esw,
- struct mlx5_flow_table *ft);
-
-int
-mlx5_esw_chains_get_chain_mapping(struct mlx5_eswitch *esw, u32 chain,
- u32 *chain_mapping);
-int
-mlx5_esw_chains_put_chain_mapping(struct mlx5_eswitch *esw,
- u32 chain_mapping);
-
-int mlx5_esw_chains_create(struct mlx5_eswitch *esw);
-void mlx5_esw_chains_destroy(struct mlx5_eswitch *esw);
-
-int
-mlx5_eswitch_get_chain_for_tag(struct mlx5_eswitch *esw, u32 tag, u32 *chain);
-
-#else /* CONFIG_MLX5_CLS_ACT */
-
-static inline struct mlx5_flow_table *
-mlx5_esw_chains_get_table(struct mlx5_eswitch *esw, u32 chain, u32 prio,
- u32 level) { return ERR_PTR(-EOPNOTSUPP); }
-static inline void
-mlx5_esw_chains_put_table(struct mlx5_eswitch *esw, u32 chain, u32 prio,
- u32 level) {}
-
-static inline struct mlx5_flow_table *
-mlx5_esw_chains_get_tc_end_ft(struct mlx5_eswitch *esw) { return ERR_PTR(-EOPNOTSUPP); }
-
-static inline int mlx5_esw_chains_create(struct mlx5_eswitch *esw) { return 0; }
-static inline void mlx5_esw_chains_destroy(struct mlx5_eswitch *esw) {}
-
-#endif /* CONFIG_MLX5_CLS_ACT */
-
-#endif /* __ML5_ESW_CHAINS_H__ */
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
index 7455fbd21a0a..fc23d57e9e44 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
@@ -42,6 +42,7 @@
#include <linux/mlx5/vport.h>
#include <linux/mlx5/fs.h>
#include "lib/mpfs.h"
+#include "lib/fs_chains.h"
#include "en/tc_ct.h"
#ifdef CONFIG_MLX5_ESWITCH
@@ -62,6 +63,9 @@
#define mlx5_esw_has_fwd_fdb(dev) \
MLX5_CAP_ESW_FLOWTABLE(dev, fdb_multi_path_to_table)
+#define esw_chains(esw) \
+ ((esw)->fdb_table.offloads.esw_chains_priv)
+
struct vport_ingress {
struct mlx5_flow_table *acl;
struct mlx5_flow_handle *allow_rule;
@@ -154,12 +158,6 @@ struct mlx5_vport {
enum mlx5_eswitch_vport_event enabled_events;
};
-enum offloads_fdb_flags {
- ESW_FDB_CHAINS_AND_PRIOS_SUPPORTED = BIT(0),
-};
-
-struct mlx5_esw_chains_priv;
-
struct mlx5_eswitch_fdb {
union {
struct legacy_fdb {
@@ -183,7 +181,7 @@ struct mlx5_eswitch_fdb {
struct mlx5_flow_handle *miss_rule_multi;
int vlan_push_pop_refcount;
- struct mlx5_esw_chains_priv *esw_chains_priv;
+ struct mlx5_fs_chains *esw_chains_priv;
struct {
DECLARE_HASHTABLE(table, 8);
/* Protects vports.table */
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
index 00bcf97cecbc..38eef5a8feb9 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
@@ -39,12 +39,12 @@
#include "mlx5_core.h"
#include "eswitch.h"
#include "esw/acl/ofld.h"
-#include "esw/chains.h"
#include "rdma.h"
#include "en.h"
#include "fs_core.h"
#include "lib/devcom.h"
#include "lib/eq.h"
+#include "lib/fs_chains.h"
/* There are two match-all miss flows, one for unicast dst mac and
* one for multicast.
@@ -294,6 +294,7 @@ mlx5_eswitch_add_offloaded_rule(struct mlx5_eswitch *esw,
{
struct mlx5_flow_destination dest[MLX5_MAX_FLOW_FWD_VPORTS + 1] = {};
struct mlx5_flow_act flow_act = { .flags = FLOW_ACT_NO_APPEND, };
+ struct mlx5_fs_chains *chains = esw_chains(esw);
bool split = !!(attr->split_count);
struct mlx5_flow_handle *rule;
struct mlx5_flow_table *fdb;
@@ -329,12 +330,12 @@ mlx5_eswitch_add_offloaded_rule(struct mlx5_eswitch *esw,
} else if (attr->flags & MLX5_ESW_ATTR_FLAG_SLOW_PATH) {
flow_act.flags |= FLOW_ACT_IGNORE_FLOW_LEVEL;
dest[i].type = MLX5_FLOW_DESTINATION_TYPE_FLOW_TABLE;
- dest[i].ft = mlx5_esw_chains_get_tc_end_ft(esw);
+ dest[i].ft = mlx5_chains_get_tc_end_ft(chains);
i++;
} else if (attr->dest_chain) {
flow_act.flags |= FLOW_ACT_IGNORE_FLOW_LEVEL;
- ft = mlx5_esw_chains_get_table(esw, attr->dest_chain,
- 1, 0);
+ ft = mlx5_chains_get_table(chains, attr->dest_chain,
+ 1, 0);
if (IS_ERR(ft)) {
rule = ERR_CAST(ft);
goto err_create_goto_table;
@@ -385,8 +386,8 @@ mlx5_eswitch_add_offloaded_rule(struct mlx5_eswitch *esw,
fdb = esw_vport_tbl_get(esw, attr);
} else {
if (attr->chain || attr->prio)
- fdb = mlx5_esw_chains_get_table(esw, attr->chain,
- attr->prio, 0);
+ fdb = mlx5_chains_get_table(chains, attr->chain,
+ attr->prio, 0);
else
fdb = attr->fdb;
@@ -416,10 +417,10 @@ err_add_rule:
if (split)
esw_vport_tbl_put(esw, attr);
else if (attr->chain || attr->prio)
- mlx5_esw_chains_put_table(esw, attr->chain, attr->prio, 0);
+ mlx5_chains_put_table(chains, attr->chain, attr->prio, 0);
err_esw_get:
if (!(attr->flags & MLX5_ESW_ATTR_FLAG_SLOW_PATH) && attr->dest_chain)
- mlx5_esw_chains_put_table(esw, attr->dest_chain, 1, 0);
+ mlx5_chains_put_table(chains, attr->dest_chain, 1, 0);
err_create_goto_table:
return rule;
}
@@ -431,12 +432,13 @@ mlx5_eswitch_add_fwd_rule(struct mlx5_eswitch *esw,
{
struct mlx5_flow_destination dest[MLX5_MAX_FLOW_FWD_VPORTS + 1] = {};
struct mlx5_flow_act flow_act = { .flags = FLOW_ACT_NO_APPEND, };
+ struct mlx5_fs_chains *chains = esw_chains(esw);
struct mlx5_flow_table *fast_fdb;
struct mlx5_flow_table *fwd_fdb;
struct mlx5_flow_handle *rule;
int i;
- fast_fdb = mlx5_esw_chains_get_table(esw, attr->chain, attr->prio, 0);
+ fast_fdb = mlx5_chains_get_table(chains, attr->chain, attr->prio, 0);
if (IS_ERR(fast_fdb)) {
rule = ERR_CAST(fast_fdb);
goto err_get_fast;
@@ -483,7 +485,7 @@ mlx5_eswitch_add_fwd_rule(struct mlx5_eswitch *esw,
add_err:
esw_vport_tbl_put(esw, attr);
err_get_fwd:
- mlx5_esw_chains_put_table(esw, attr->chain, attr->prio, 0);
+ mlx5_chains_put_table(chains, attr->chain, attr->prio, 0);
err_get_fast:
return rule;
}
@@ -494,6 +496,7 @@ __mlx5_eswitch_del_rule(struct mlx5_eswitch *esw,
struct mlx5_esw_flow_attr *attr,
bool fwd_rule)
{
+ struct mlx5_fs_chains *chains = esw_chains(esw);
bool split = (attr->split_count > 0);
int i;
@@ -511,15 +514,14 @@ __mlx5_eswitch_del_rule(struct mlx5_eswitch *esw,
if (fwd_rule) {
esw_vport_tbl_put(esw, attr);
- mlx5_esw_chains_put_table(esw, attr->chain, attr->prio, 0);
+ mlx5_chains_put_table(chains, attr->chain, attr->prio, 0);
} else {
if (split)
esw_vport_tbl_put(esw, attr);
else if (attr->chain || attr->prio)
- mlx5_esw_chains_put_table(esw, attr->chain, attr->prio,
- 0);
+ mlx5_chains_put_table(chains, attr->chain, attr->prio, 0);
if (attr->dest_chain)
- mlx5_esw_chains_put_table(esw, attr->dest_chain, 1, 0);
+ mlx5_chains_put_table(chains, attr->dest_chain, 1, 0);
}
}
@@ -1137,6 +1139,126 @@ static void esw_set_flow_group_source_port(struct mlx5_eswitch *esw,
}
}
+#if IS_ENABLED(CONFIG_MLX5_CLS_ACT)
+#define fdb_modify_header_fwd_to_table_supported(esw) \
+ (MLX5_CAP_ESW_FLOWTABLE((esw)->dev, fdb_modify_header_fwd_to_table))
+static void esw_init_chains_offload_flags(struct mlx5_eswitch *esw, u32 *flags)
+{
+ struct mlx5_core_dev *dev = esw->dev;
+
+ if (MLX5_CAP_ESW_FLOWTABLE_FDB(dev, ignore_flow_level))
+ *flags |= MLX5_CHAINS_IGNORE_FLOW_LEVEL_SUPPORTED;
+
+ if (!MLX5_CAP_ESW_FLOWTABLE(dev, multi_fdb_encap) &&
+ esw->offloads.encap != DEVLINK_ESWITCH_ENCAP_MODE_NONE) {
+ *flags &= ~MLX5_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)) {
+ *flags &= ~MLX5_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");
+ *flags &= ~MLX5_CHAINS_AND_PRIOS_SUPPORTED;
+ } else {
+ *flags |= MLX5_CHAINS_AND_PRIOS_SUPPORTED;
+ esw_info(dev, "Supported tc chains and prios offload\n");
+ }
+
+ if (esw->offloads.encap != DEVLINK_ESWITCH_ENCAP_MODE_NONE)
+ *flags |= MLX5_CHAINS_FT_TUNNEL_SUPPORTED;
+}
+
+static int
+esw_chains_create(struct mlx5_eswitch *esw, struct mlx5_flow_table *miss_fdb)
+{
+ struct mlx5_core_dev *dev = esw->dev;
+ struct mlx5_flow_table *nf_ft, *ft;
+ struct mlx5_chains_attr attr = {};
+ struct mlx5_fs_chains *chains;
+ u32 fdb_max;
+ int err;
+
+ fdb_max = 1 << MLX5_CAP_ESW_FLOWTABLE_FDB(dev, log_max_ft_size);
+
+ esw_init_chains_offload_flags(esw, &attr.flags);
+ attr.ns = MLX5_FLOW_NAMESPACE_FDB;
+ attr.max_ft_sz = fdb_max;
+ attr.max_grp_num = esw->params.large_group_num;
+ attr.default_ft = miss_fdb;
+ attr.max_restore_tag = esw_get_max_restore_tag(esw);
+
+ chains = mlx5_chains_create(dev, &attr);
+ if (IS_ERR(chains)) {
+ err = PTR_ERR(chains);
+ esw_warn(dev, "Failed to create fdb chains err(%d)\n", err);
+ return err;
+ }
+
+ esw->fdb_table.offloads.esw_chains_priv = chains;
+
+ /* Create tc_end_ft which is the always created ft chain */
+ nf_ft = mlx5_chains_get_table(chains, mlx5_chains_get_nf_ft_chain(chains),
+ 1, 0);
+ if (IS_ERR(nf_ft)) {
+ err = PTR_ERR(nf_ft);
+ goto nf_ft_err;
+ }
+
+ /* Always open the root for fast path */
+ ft = mlx5_chains_get_table(chains, 0, 1, 0);
+ if (IS_ERR(ft)) {
+ err = PTR_ERR(ft);
+ goto level_0_err;
+ }
+
+ /* Open level 1 for split fdb rules now if prios isn't supported */
+ if (!mlx5_chains_prios_supported(chains)) {
+ err = mlx5_esw_vport_tbl_get(esw);
+ if (err)
+ goto level_1_err;
+ }
+
+ mlx5_chains_set_end_ft(chains, nf_ft);
+
+ return 0;
+
+level_1_err:
+ mlx5_chains_put_table(chains, 0, 1, 0);
+level_0_err:
+ mlx5_chains_put_table(chains, mlx5_chains_get_nf_ft_chain(chains), 1, 0);
+nf_ft_err:
+ mlx5_chains_destroy(chains);
+ esw->fdb_table.offloads.esw_chains_priv = NULL;
+
+ return err;
+}
+
+static void
+esw_chains_destroy(struct mlx5_eswitch *esw, struct mlx5_fs_chains *chains)
+{
+ if (!mlx5_chains_prios_supported(chains))
+ mlx5_esw_vport_tbl_put(esw);
+ mlx5_chains_put_table(chains, 0, 1, 0);
+ mlx5_chains_put_table(chains, mlx5_chains_get_nf_ft_chain(chains), 1, 0);
+ mlx5_chains_destroy(chains);
+}
+
+#else /* CONFIG_MLX5_CLS_ACT */
+
+static int
+esw_chains_create(struct mlx5_eswitch *esw, struct mlx5_flow_table *miss_fdb)
+{ return 0; }
+
+static void
+esw_chains_destroy(struct mlx5_eswitch *esw, struct mlx5_fs_chains *chains)
+{}
+
+#endif
+
static int esw_create_offloads_fdb_tables(struct mlx5_eswitch *esw)
{
int inlen = MLX5_ST_SZ_BYTES(create_flow_group_in);
@@ -1192,9 +1314,9 @@ static int esw_create_offloads_fdb_tables(struct mlx5_eswitch *esw)
}
esw->fdb_table.offloads.slow_fdb = fdb;
- err = mlx5_esw_chains_create(esw);
+ err = esw_chains_create(esw, fdb);
if (err) {
- esw_warn(dev, "Failed to create fdb chains err(%d)\n", err);
+ esw_warn(dev, "Failed to open fdb chains err(%d)\n", err);
goto fdb_chains_err;
}
@@ -1288,7 +1410,7 @@ miss_err:
peer_miss_err:
mlx5_destroy_flow_group(esw->fdb_table.offloads.send_to_vport_grp);
send_vport_err:
- mlx5_esw_chains_destroy(esw);
+ esw_chains_destroy(esw, esw_chains(esw));
fdb_chains_err:
mlx5_destroy_flow_table(esw->fdb_table.offloads.slow_fdb);
slow_fdb_err:
@@ -1312,7 +1434,8 @@ static void esw_destroy_offloads_fdb_tables(struct mlx5_eswitch *esw)
mlx5_destroy_flow_group(esw->fdb_table.offloads.peer_miss_grp);
mlx5_destroy_flow_group(esw->fdb_table.offloads.miss_grp);
- mlx5_esw_chains_destroy(esw);
+ esw_chains_destroy(esw, esw_chains(esw));
+
mlx5_destroy_flow_table(esw->fdb_table.offloads.slow_fdb);
/* Holds true only as long as DMFS is the default */
mlx5_flow_namespace_set_mode(esw->fdb_table.offloads.ns,
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/fs_chains.c b/drivers/net/ethernet/mellanox/mlx5/core/lib/fs_chains.c
new file mode 100644
index 000000000000..5bd65cdc9b07
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/fs_chains.c
@@ -0,0 +1,902 @@
+// 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 "lib/fs_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 chains_lock(chains) ((chains)->lock)
+#define chains_ht(chains) ((chains)->chains_ht)
+#define chains_mapping(chains) ((chains)->chains_mapping)
+#define prios_ht(chains) ((chains)->prios_ht)
+#define ft_pool_left(chains) ((chains)->ft_left)
+#define tc_default_ft(chains) ((chains)->tc_default_ft)
+#define tc_end_ft(chains) ((chains)->tc_end_ft)
+#define ns_to_chains_fs_prio(ns) ((ns) == MLX5_FLOW_NAMESPACE_FDB ? \
+ FDB_TC_OFFLOAD : MLX5E_TC_PRIO)
+
+/* Firmware currently has 4 pool of 4 sizes that it supports (FT_POOLS),
+ * and a virtual memory region of 16M (MLX5_FT_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 FT_SIZE (16 * 1024 * 1024)
+static const unsigned int FT_POOLS[] = { 4 * 1024 * 1024,
+ 1 * 1024 * 1024,
+ 64 * 1024,
+ 128 };
+#define FT_TBL_SZ (64 * 1024)
+
+struct mlx5_fs_chains {
+ struct mlx5_core_dev *dev;
+
+ struct rhashtable chains_ht;
+ struct rhashtable prios_ht;
+ /* Protects above chains_ht and prios_ht */
+ struct mutex lock;
+
+ struct mlx5_flow_table *tc_default_ft;
+ struct mlx5_flow_table *tc_end_ft;
+ struct mapping_ctx *chains_mapping;
+
+ enum mlx5_flow_namespace_type ns;
+ u32 group_num;
+ u32 flags;
+
+ int ft_left[ARRAY_SIZE(FT_POOLS)];
+};
+
+struct fs_chain {
+ struct rhash_head node;
+
+ u32 chain;
+
+ int ref;
+ int id;
+
+ struct mlx5_fs_chains *chains;
+ struct list_head prios_list;
+ struct mlx5_flow_handle *restore_rule;
+ struct mlx5_modify_hdr *miss_modify_hdr;
+};
+
+struct prio_key {
+ u32 chain;
+ u32 prio;
+ u32 level;
+};
+
+struct prio {
+ struct rhash_head node;
+ struct list_head list;
+
+ struct prio_key key;
+
+ int ref;
+
+ struct fs_chain *chain;
+ struct mlx5_flow_table *ft;
+ struct mlx5_flow_table *next_ft;
+ struct mlx5_flow_group *miss_group;
+ struct mlx5_flow_handle *miss_rule;
+};
+
+static const struct rhashtable_params chain_params = {
+ .head_offset = offsetof(struct fs_chain, node),
+ .key_offset = offsetof(struct fs_chain, chain),
+ .key_len = sizeof_field(struct fs_chain, chain),
+ .automatic_shrinking = true,
+};
+
+static const struct rhashtable_params prio_params = {
+ .head_offset = offsetof(struct prio, node),
+ .key_offset = offsetof(struct prio, key),
+ .key_len = sizeof_field(struct prio, key),
+ .automatic_shrinking = true,
+};
+
+bool mlx5_chains_prios_supported(struct mlx5_fs_chains *chains)
+{
+ return chains->flags & MLX5_CHAINS_AND_PRIOS_SUPPORTED;
+}
+
+static bool mlx5_chains_ignore_flow_level_supported(struct mlx5_fs_chains *chains)
+{
+ return chains->flags & MLX5_CHAINS_IGNORE_FLOW_LEVEL_SUPPORTED;
+}
+
+bool mlx5_chains_backwards_supported(struct mlx5_fs_chains *chains)
+{
+ return mlx5_chains_prios_supported(chains) &&
+ mlx5_chains_ignore_flow_level_supported(chains);
+}
+
+u32 mlx5_chains_get_chain_range(struct mlx5_fs_chains *chains)
+{
+ if (!mlx5_chains_prios_supported(chains))
+ return 1;
+
+ if (mlx5_chains_ignore_flow_level_supported(chains))
+ return UINT_MAX - 1;
+
+ /* We should get here only for eswitch case */
+ return FDB_TC_MAX_CHAIN;
+}
+
+u32 mlx5_chains_get_nf_ft_chain(struct mlx5_fs_chains *chains)
+{
+ return mlx5_chains_get_chain_range(chains) + 1;
+}
+
+u32 mlx5_chains_get_prio_range(struct mlx5_fs_chains *chains)
+{
+ if (!mlx5_chains_prios_supported(chains))
+ return 1;
+
+ if (mlx5_chains_ignore_flow_level_supported(chains))
+ return UINT_MAX;
+
+ /* We should get here only for eswitch case */
+ return FDB_TC_MAX_PRIO;
+}
+
+static unsigned int mlx5_chains_get_level_range(struct mlx5_fs_chains *chains)
+{
+ if (mlx5_chains_ignore_flow_level_supported(chains))
+ return UINT_MAX;
+
+ /* Same value for FDB and NIC RX tables */
+ return FDB_TC_LEVELS_PER_PRIO;
+}
+
+void
+mlx5_chains_set_end_ft(struct mlx5_fs_chains *chains,
+ struct mlx5_flow_table *ft)
+{
+ tc_end_ft(chains) = ft;
+}
+
+#define POOL_NEXT_SIZE 0
+static int
+mlx5_chains_get_avail_sz_from_pool(struct mlx5_fs_chains *chains,
+ int desired_size)
+{
+ int i, found_i = -1;
+
+ for (i = ARRAY_SIZE(FT_POOLS) - 1; i >= 0; i--) {
+ if (ft_pool_left(chains)[i] && FT_POOLS[i] > desired_size) {
+ found_i = i;
+ if (desired_size != POOL_NEXT_SIZE)
+ break;
+ }
+ }
+
+ if (found_i != -1) {
+ --ft_pool_left(chains)[found_i];
+ return FT_POOLS[found_i];
+ }
+
+ return 0;
+}
+
+static void
+mlx5_chains_put_sz_to_pool(struct mlx5_fs_chains *chains, int sz)
+{
+ int i;
+
+ for (i = ARRAY_SIZE(FT_POOLS) - 1; i >= 0; i--) {
+ if (sz == FT_POOLS[i]) {
+ ++ft_pool_left(chains)[i];
+ return;
+ }
+ }
+
+ WARN_ONCE(1, "Couldn't find size %d in flow table size pool", sz);
+}
+
+static void
+mlx5_chains_init_sz_pool(struct mlx5_fs_chains *chains, u32 ft_max)
+{
+ int i;
+
+ for (i = ARRAY_SIZE(FT_POOLS) - 1; i >= 0; i--)
+ ft_pool_left(chains)[i] =
+ FT_POOLS[i] <= ft_max ? FT_SIZE / FT_POOLS[i] : 0;
+}
+
+static struct mlx5_flow_table *
+mlx5_chains_create_table(struct mlx5_fs_chains *chains,
+ u32 chain, u32 prio, u32 level)
+{
+ struct mlx5_flow_table_attr ft_attr = {};
+ struct mlx5_flow_namespace *ns;
+ struct mlx5_flow_table *ft;
+ int sz;
+
+ if (chains->flags & MLX5_CHAINS_FT_TUNNEL_SUPPORTED)
+ ft_attr.flags |= (MLX5_FLOW_TABLE_TUNNEL_EN_REFORMAT |
+ MLX5_FLOW_TABLE_TUNNEL_EN_DECAP);
+
+ sz = (chain == mlx5_chains_get_nf_ft_chain(chains)) ?
+ mlx5_chains_get_avail_sz_from_pool(chains, FT_TBL_SZ) :
+ mlx5_chains_get_avail_sz_from_pool(chains, POOL_NEXT_SIZE);
+ if (!sz)
+ return ERR_PTR(-ENOSPC);
+ ft_attr.max_fte = sz;
+
+ /* We use tc_default_ft(chains) 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_default_ft(chains);
+
+ /* The root table(chain 0, prio 1, level 0) is required to be
+ * connected to the previous fs_core managed prio.
+ * We always create it, as a managed table, in order to align with
+ * fs_core logic.
+ */
+ if (!mlx5_chains_ignore_flow_level_supported(chains) ||
+ (chain == 0 && prio == 1 && level == 0)) {
+ ft_attr.level = level;
+ ft_attr.prio = prio - 1;
+ ns = (chains->ns == MLX5_FLOW_NAMESPACE_FDB) ?
+ mlx5_get_fdb_sub_ns(chains->dev, chain) :
+ mlx5_get_flow_namespace(chains->dev, chains->ns);
+ } else {
+ ft_attr.flags |= MLX5_FLOW_TABLE_UNMANAGED;
+ ft_attr.prio = ns_to_chains_fs_prio(chains->ns);
+ /* 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(chains->dev, chains->ns);
+ }
+
+ ft_attr.autogroup.num_reserved_entries = 2;
+ ft_attr.autogroup.max_num_groups = chains->group_num;
+ ft = mlx5_create_auto_grouped_flow_table(ns, &ft_attr);
+ if (IS_ERR(ft)) {
+ mlx5_core_warn(chains->dev, "Failed to create chains table err %d (chain: %d, prio: %d, level: %d, size: %d)\n",
+ (int)PTR_ERR(ft), chain, prio, level, sz);
+ mlx5_chains_put_sz_to_pool(chains, sz);
+ return ft;
+ }
+
+ return ft;
+}
+
+static void
+mlx5_chains_destroy_table(struct mlx5_fs_chains *chains,
+ struct mlx5_flow_table *ft)
+{
+ mlx5_chains_put_sz_to_pool(chains, ft->max_fte);
+ mlx5_destroy_flow_table(ft);
+}
+
+static int
+create_chain_restore(struct fs_chain *chain)
+{
+ struct mlx5_eswitch *esw = chain->chains->dev->priv.eswitch;
+ char modact[MLX5_UN_SZ_BYTES(set_add_copy_action_in_auto)];
+ struct mlx5_fs_chains *chains = chain->chains;
+ enum mlx5e_tc_attr_to_reg chain_to_reg;
+ struct mlx5_modify_hdr *mod_hdr;
+ u32 index;
+ int err;
+
+ if (chain->chain == mlx5_chains_get_nf_ft_chain(chains) ||
+ !mlx5_chains_prios_supported(chains))
+ return 0;
+
+ err = mapping_add(chains_mapping(chains), &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(chains_mapping(chains),
+ &chain->chain, &index);
+ mapping_remove(chains_mapping(chains),
+ MLX5_FS_DEFAULT_FLOW_TAG);
+ if (err)
+ return err;
+ }
+
+ chain->id = index;
+
+ if (chains->ns == MLX5_FLOW_NAMESPACE_FDB) {
+ chain_to_reg = CHAIN_TO_REG;
+ chain->restore_rule = esw_add_restore_rule(esw, chain->id);
+ if (IS_ERR(chain->restore_rule)) {
+ err = PTR_ERR(chain->restore_rule);
+ goto err_rule;
+ }
+ } else {
+ err = -EINVAL;
+ goto err_rule;
+ }
+
+ 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, chain->id);
+ mod_hdr = mlx5_modify_header_alloc(chains->dev, chains->ns,
+ 1, modact);
+ if (IS_ERR(mod_hdr)) {
+ err = PTR_ERR(mod_hdr);
+ goto err_mod_hdr;
+ }
+ chain->miss_modify_hdr = mod_hdr;
+
+ return 0;
+
+err_mod_hdr:
+ if (!IS_ERR_OR_NULL(chain->restore_rule))
+ mlx5_del_flow_rules(chain->restore_rule);
+err_rule:
+ /* Datapath can't find this mapping, so we can safely remove it */
+ mapping_remove(chains_mapping(chains), chain->id);
+ return err;
+}
+
+static void destroy_chain_restore(struct fs_chain *chain)
+{
+ struct mlx5_fs_chains *chains = chain->chains;
+
+ if (!chain->miss_modify_hdr)
+ return;
+
+ if (chain->restore_rule)
+ mlx5_del_flow_rules(chain->restore_rule);
+
+ mlx5_modify_header_dealloc(chains->dev, chain->miss_modify_hdr);
+ mapping_remove(chains_mapping(chains), chain->id);
+}
+
+static struct fs_chain *
+mlx5_chains_create_chain(struct mlx5_fs_chains *chains, u32 chain)
+{
+ struct fs_chain *chain_s = NULL;
+ int err;
+
+ chain_s = kvzalloc(sizeof(*chain_s), GFP_KERNEL);
+ if (!chain_s)
+ return ERR_PTR(-ENOMEM);
+
+ chain_s->chains = chains;
+ chain_s->chain = chain;
+ INIT_LIST_HEAD(&chain_s->prios_list);
+
+ err = create_chain_restore(chain_s);
+ if (err)
+ goto err_restore;
+
+ err = rhashtable_insert_fast(&chains_ht(chains), &chain_s->node,
+ chain_params);
+ if (err)
+ goto err_insert;
+
+ return chain_s;
+
+err_insert:
+ destroy_chain_restore(chain_s);
+err_restore:
+ kvfree(chain_s);
+ return ERR_PTR(err);
+}
+
+static void
+mlx5_chains_destroy_chain(struct fs_chain *chain)
+{
+ struct mlx5_fs_chains *chains = chain->chains;
+
+ rhashtable_remove_fast(&chains_ht(chains), &chain->node,
+ chain_params);
+
+ destroy_chain_restore(chain);
+ kvfree(chain);
+}
+
+static struct fs_chain *
+mlx5_chains_get_chain(struct mlx5_fs_chains *chains, u32 chain)
+{
+ struct fs_chain *chain_s;
+
+ chain_s = rhashtable_lookup_fast(&chains_ht(chains), &chain,
+ chain_params);
+ if (!chain_s) {
+ chain_s = mlx5_chains_create_chain(chains, chain);
+ if (IS_ERR(chain_s))
+ return chain_s;
+ }
+
+ chain_s->ref++;
+
+ return chain_s;
+}
+
+static struct mlx5_flow_handle *
+mlx5_chains_add_miss_rule(struct fs_chain *chain,
+ struct mlx5_flow_table *ft,
+ struct mlx5_flow_table *next_ft)
+{
+ struct mlx5_fs_chains *chains = chain->chains;
+ 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_ft;
+
+ if (next_ft == tc_end_ft(chains) &&
+ chain->chain != mlx5_chains_get_nf_ft_chain(chains) &&
+ mlx5_chains_prios_supported(chains)) {
+ act.modify_hdr = chain->miss_modify_hdr;
+ act.action |= MLX5_FLOW_CONTEXT_ACTION_MOD_HDR;
+ }
+
+ return mlx5_add_flow_rules(ft, NULL, &act, &dest, 1);
+}
+
+static int
+mlx5_chains_update_prio_prevs(struct prio *prio,
+ struct mlx5_flow_table *next_ft)
+{
+ struct mlx5_flow_handle *miss_rules[FDB_TC_LEVELS_PER_PRIO + 1] = {};
+ struct fs_chain *chain = prio->chain;
+ struct prio *pos;
+ int n = 0, err;
+
+ if (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 = prio;
+ list_for_each_entry_continue_reverse(pos,
+ &chain->prios_list,
+ list) {
+ miss_rules[n] = mlx5_chains_add_miss_rule(chain,
+ pos->ft,
+ next_ft);
+ 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 = prio;
+ list_for_each_entry_continue_reverse(pos,
+ &chain->prios_list,
+ list) {
+ mlx5_del_flow_rules(pos->miss_rule);
+
+ pos->miss_rule = miss_rules[n];
+ pos->next_ft = next_ft;
+
+ 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_chains_put_chain(struct fs_chain *chain)
+{
+ if (--chain->ref == 0)
+ mlx5_chains_destroy_chain(chain);
+}
+
+static struct prio *
+mlx5_chains_create_prio(struct mlx5_fs_chains *chains,
+ 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 mlx5_flow_table *next_ft;
+ struct mlx5_flow_table *ft;
+ struct prio *prio_s = NULL;
+ struct fs_chain *chain_s;
+ struct list_head *pos;
+ u32 *flow_group_in;
+ int err;
+
+ chain_s = mlx5_chains_get_chain(chains, chain);
+ if (IS_ERR(chain_s))
+ return ERR_CAST(chain_s);
+
+ prio_s = kvzalloc(sizeof(*prio_s), GFP_KERNEL);
+ flow_group_in = kvzalloc(inlen, GFP_KERNEL);
+ if (!prio_s || !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_ft = (chain == mlx5_chains_get_nf_ft_chain(chains)) ?
+ tc_default_ft(chains) :
+ tc_end_ft(chains);
+ list_for_each(pos, &chain_s->prios_list) {
+ struct prio *p = list_entry(pos, struct 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_ft = p->key.level == 0 ? p->ft : p->next_ft;
+ break;
+ }
+ }
+
+ ft = mlx5_chains_create_table(chains, chain, prio, level);
+ if (IS_ERR(ft)) {
+ err = PTR_ERR(ft);
+ goto err_create;
+ }
+
+ MLX5_SET(create_flow_group_in, flow_group_in, start_flow_index,
+ ft->max_fte - 2);
+ MLX5_SET(create_flow_group_in, flow_group_in, end_flow_index,
+ ft->max_fte - 1);
+ miss_group = mlx5_create_flow_group(ft, flow_group_in);
+ if (IS_ERR(miss_group)) {
+ err = PTR_ERR(miss_group);
+ goto err_group;
+ }
+
+ /* Add miss rule to next_ft */
+ miss_rule = mlx5_chains_add_miss_rule(chain_s, ft, next_ft);
+ if (IS_ERR(miss_rule)) {
+ err = PTR_ERR(miss_rule);
+ goto err_miss_rule;
+ }
+
+ prio_s->miss_group = miss_group;
+ prio_s->miss_rule = miss_rule;
+ prio_s->next_ft = next_ft;
+ prio_s->chain = chain_s;
+ prio_s->key.chain = chain;
+ prio_s->key.prio = prio;
+ prio_s->key.level = level;
+ prio_s->ft = ft;
+
+ err = rhashtable_insert_fast(&prios_ht(chains), &prio_s->node,
+ prio_params);
+ if (err)
+ goto err_insert;
+
+ list_add(&prio_s->list, pos->prev);
+
+ /* Table is ready, connect it */
+ err = mlx5_chains_update_prio_prevs(prio_s, ft);
+ if (err)
+ goto err_update;
+
+ kvfree(flow_group_in);
+ return prio_s;
+
+err_update:
+ list_del(&prio_s->list);
+ rhashtable_remove_fast(&prios_ht(chains), &prio_s->node,
+ prio_params);
+err_insert:
+ mlx5_del_flow_rules(miss_rule);
+err_miss_rule:
+ mlx5_destroy_flow_group(miss_group);
+err_group:
+ mlx5_chains_destroy_table(chains, ft);
+err_create:
+err_alloc:
+ kvfree(prio_s);
+ kvfree(flow_group_in);
+ mlx5_chains_put_chain(chain_s);
+ return ERR_PTR(err);
+}
+
+static void
+mlx5_chains_destroy_prio(struct mlx5_fs_chains *chains,
+ struct prio *prio)
+{
+ struct fs_chain *chain = prio->chain;
+
+ WARN_ON(mlx5_chains_update_prio_prevs(prio,
+ prio->next_ft));
+
+ list_del(&prio->list);
+ rhashtable_remove_fast(&prios_ht(chains), &prio->node,
+ prio_params);
+ mlx5_del_flow_rules(prio->miss_rule);
+ mlx5_destroy_flow_group(prio->miss_group);
+ mlx5_chains_destroy_table(chains, prio->ft);
+ mlx5_chains_put_chain(chain);
+ kvfree(prio);
+}
+
+struct mlx5_flow_table *
+mlx5_chains_get_table(struct mlx5_fs_chains *chains, u32 chain, u32 prio,
+ u32 level)
+{
+ struct mlx5_flow_table *prev_fts;
+ struct prio *prio_s;
+ struct prio_key key;
+ int l = 0;
+
+ if ((chain > mlx5_chains_get_chain_range(chains) &&
+ chain != mlx5_chains_get_nf_ft_chain(chains)) ||
+ prio > mlx5_chains_get_prio_range(chains) ||
+ level > mlx5_chains_get_level_range(chains))
+ return ERR_PTR(-EOPNOTSUPP);
+
+ /* create earlier levels for correct fs_core lookup when
+ * connecting tables.
+ */
+ for (l = 0; l < level; l++) {
+ prev_fts = mlx5_chains_get_table(chains, chain, prio, l);
+ if (IS_ERR(prev_fts)) {
+ prio_s = ERR_CAST(prev_fts);
+ goto err_get_prevs;
+ }
+ }
+
+ key.chain = chain;
+ key.prio = prio;
+ key.level = level;
+
+ mutex_lock(&chains_lock(chains));
+ prio_s = rhashtable_lookup_fast(&prios_ht(chains), &key,
+ prio_params);
+ if (!prio_s) {
+ prio_s = mlx5_chains_create_prio(chains, chain,
+ prio, level);
+ if (IS_ERR(prio_s))
+ goto err_create_prio;
+ }
+
+ ++prio_s->ref;
+ mutex_unlock(&chains_lock(chains));
+
+ return prio_s->ft;
+
+err_create_prio:
+ mutex_unlock(&chains_lock(chains));
+err_get_prevs:
+ while (--l >= 0)
+ mlx5_chains_put_table(chains, chain, prio, l);
+ return ERR_CAST(prio_s);
+}
+
+void
+mlx5_chains_put_table(struct mlx5_fs_chains *chains, u32 chain, u32 prio,
+ u32 level)
+{
+ struct prio *prio_s;
+ struct prio_key key;
+
+ key.chain = chain;
+ key.prio = prio;
+ key.level = level;
+
+ mutex_lock(&chains_lock(chains));
+ prio_s = rhashtable_lookup_fast(&prios_ht(chains), &key,
+ prio_params);
+ if (!prio_s)
+ goto err_get_prio;
+
+ if (--prio_s->ref == 0)
+ mlx5_chains_destroy_prio(chains, prio_s);
+ mutex_unlock(&chains_lock(chains));
+
+ while (level-- > 0)
+ mlx5_chains_put_table(chains, chain, prio, level);
+
+ return;
+
+err_get_prio:
+ mutex_unlock(&chains_lock(chains));
+ WARN_ONCE(1,
+ "Couldn't find table: (chain: %d prio: %d level: %d)",
+ chain, prio, level);
+}
+
+struct mlx5_flow_table *
+mlx5_chains_get_tc_end_ft(struct mlx5_fs_chains *chains)
+{
+ return tc_end_ft(chains);
+}
+
+struct mlx5_flow_table *
+mlx5_chains_create_global_table(struct mlx5_fs_chains *chains)
+{
+ u32 chain, prio, level;
+ int err;
+
+ if (!mlx5_chains_ignore_flow_level_supported(chains)) {
+ err = -EOPNOTSUPP;
+
+ mlx5_core_warn(chains->dev,
+ "Couldn't create global flow table, ignore_flow_level not supported.");
+ goto err_ignore;
+ }
+
+ chain = mlx5_chains_get_chain_range(chains),
+ prio = mlx5_chains_get_prio_range(chains);
+ level = mlx5_chains_get_level_range(chains);
+
+ return mlx5_chains_create_table(chains, chain, prio, level);
+
+err_ignore:
+ return ERR_PTR(err);
+}
+
+void
+mlx5_chains_destroy_global_table(struct mlx5_fs_chains *chains,
+ struct mlx5_flow_table *ft)
+{
+ mlx5_chains_destroy_table(chains, ft);
+}
+
+static struct mlx5_fs_chains *
+mlx5_chains_init(struct mlx5_core_dev *dev, struct mlx5_chains_attr *attr)
+{
+ struct mlx5_fs_chains *chains_priv;
+ struct mapping_ctx *mapping;
+ u32 max_flow_counter;
+ int err;
+
+ chains_priv = kzalloc(sizeof(*chains_priv), GFP_KERNEL);
+ if (!chains_priv)
+ return ERR_PTR(-ENOMEM);
+
+ max_flow_counter = (MLX5_CAP_GEN(dev, max_flow_counter_31_16) << 16) |
+ MLX5_CAP_GEN(dev, max_flow_counter_15_0);
+
+ mlx5_core_dbg(dev,
+ "Init flow table chains, max counters(%d), groups(%d), max flow table size(%d)\n",
+ max_flow_counter, attr->max_grp_num, attr->max_ft_sz);
+
+ chains_priv->dev = dev;
+ chains_priv->flags = attr->flags;
+ chains_priv->ns = attr->ns;
+ chains_priv->group_num = attr->max_grp_num;
+ tc_default_ft(chains_priv) = tc_end_ft(chains_priv) = attr->default_ft;
+
+ mlx5_core_info(dev, "Supported tc offload range - chains: %u, prios: %u\n",
+ mlx5_chains_get_chain_range(chains_priv),
+ mlx5_chains_get_prio_range(chains_priv));
+
+ mlx5_chains_init_sz_pool(chains_priv, attr->max_ft_sz);
+
+ err = rhashtable_init(&chains_ht(chains_priv), &chain_params);
+ if (err)
+ goto init_chains_ht_err;
+
+ err = rhashtable_init(&prios_ht(chains_priv), &prio_params);
+ if (err)
+ goto init_prios_ht_err;
+
+ mapping = mapping_create(sizeof(u32), attr->max_restore_tag,
+ true);
+ if (IS_ERR(mapping)) {
+ err = PTR_ERR(mapping);
+ goto mapping_err;
+ }
+ chains_mapping(chains_priv) = mapping;
+
+ mutex_init(&chains_lock(chains_priv));
+
+ return chains_priv;
+
+mapping_err:
+ rhashtable_destroy(&prios_ht(chains_priv));
+init_prios_ht_err:
+ rhashtable_destroy(&chains_ht(chains_priv));
+init_chains_ht_err:
+ kfree(chains_priv);
+ return ERR_PTR(err);
+}
+
+static void
+mlx5_chains_cleanup(struct mlx5_fs_chains *chains)
+{
+ mutex_destroy(&chains_lock(chains));
+ mapping_destroy(chains_mapping(chains));
+ rhashtable_destroy(&prios_ht(chains));
+ rhashtable_destroy(&chains_ht(chains));
+
+ kfree(chains);
+}
+
+struct mlx5_fs_chains *
+mlx5_chains_create(struct mlx5_core_dev *dev, struct mlx5_chains_attr *attr)
+{
+ struct mlx5_fs_chains *chains;
+
+ chains = mlx5_chains_init(dev, attr);
+
+ return chains;
+}
+
+void
+mlx5_chains_destroy(struct mlx5_fs_chains *chains)
+{
+ mlx5_chains_cleanup(chains);
+}
+
+int
+mlx5_chains_get_chain_mapping(struct mlx5_fs_chains *chains, u32 chain,
+ u32 *chain_mapping)
+{
+ return mapping_add(chains_mapping(chains), &chain, chain_mapping);
+}
+
+int
+mlx5_chains_put_chain_mapping(struct mlx5_fs_chains *chains, u32 chain_mapping)
+{
+ return mapping_remove(chains_mapping(chains), chain_mapping);
+}
+
+int mlx5_get_chain_for_tag(struct mlx5_fs_chains *chains, u32 tag,
+ u32 *chain)
+{
+ int err;
+
+ err = mapping_find(chains_mapping(chains), tag, chain);
+ if (err) {
+ mlx5_core_warn(chains->dev, "Can't find chain for tag: %d\n", tag);
+ return -ENOENT;
+ }
+
+ return 0;
+}
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/fs_chains.h b/drivers/net/ethernet/mellanox/mlx5/core/lib/fs_chains.h
new file mode 100644
index 000000000000..6d5be31b05dd
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/fs_chains.h
@@ -0,0 +1,93 @@
+/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
+/* Copyright (c) 2020 Mellanox Technologies. */
+
+#ifndef __ML5_ESW_CHAINS_H__
+#define __ML5_ESW_CHAINS_H__
+
+#include <linux/mlx5/fs.h>
+
+struct mlx5_fs_chains;
+
+enum mlx5_chains_flags {
+ MLX5_CHAINS_AND_PRIOS_SUPPORTED = BIT(0),
+ MLX5_CHAINS_IGNORE_FLOW_LEVEL_SUPPORTED = BIT(1),
+ MLX5_CHAINS_FT_TUNNEL_SUPPORTED = BIT(2),
+};
+
+struct mlx5_chains_attr {
+ enum mlx5_flow_namespace_type ns;
+ u32 flags;
+ u32 max_ft_sz;
+ u32 max_grp_num;
+ struct mlx5_flow_table *default_ft;
+ u32 max_restore_tag;
+};
+
+#if IS_ENABLED(CONFIG_MLX5_CLS_ACT)
+
+bool
+mlx5_chains_prios_supported(struct mlx5_fs_chains *chains);
+bool
+mlx5_chains_backwards_supported(struct mlx5_fs_chains *chains);
+u32
+mlx5_chains_get_prio_range(struct mlx5_fs_chains *chains);
+u32
+mlx5_chains_get_chain_range(struct mlx5_fs_chains *chains);
+u32
+mlx5_chains_get_nf_ft_chain(struct mlx5_fs_chains *chains);
+
+struct mlx5_flow_table *
+mlx5_chains_get_table(struct mlx5_fs_chains *chains, u32 chain, u32 prio,
+ u32 level);
+void
+mlx5_chains_put_table(struct mlx5_fs_chains *chains, u32 chain, u32 prio,
+ u32 level);
+
+struct mlx5_flow_table *
+mlx5_chains_get_tc_end_ft(struct mlx5_fs_chains *chains);
+
+struct mlx5_flow_table *
+mlx5_chains_create_global_table(struct mlx5_fs_chains *chains);
+void
+mlx5_chains_destroy_global_table(struct mlx5_fs_chains *chains,
+ struct mlx5_flow_table *ft);
+
+int
+mlx5_chains_get_chain_mapping(struct mlx5_fs_chains *chains, u32 chain,
+ u32 *chain_mapping);
+int
+mlx5_chains_put_chain_mapping(struct mlx5_fs_chains *chains,
+ u32 chain_mapping);
+
+struct mlx5_fs_chains *
+mlx5_chains_create(struct mlx5_core_dev *dev, struct mlx5_chains_attr *attr);
+void mlx5_chains_destroy(struct mlx5_fs_chains *chains);
+
+int
+mlx5_get_chain_for_tag(struct mlx5_fs_chains *chains, u32 tag, u32 *chain);
+
+void
+mlx5_chains_set_end_ft(struct mlx5_fs_chains *chains,
+ struct mlx5_flow_table *ft);
+
+#else /* CONFIG_MLX5_CLS_ACT */
+
+static inline struct mlx5_flow_table *
+mlx5_chains_get_table(struct mlx5_fs_chains *chains, u32 chain, u32 prio,
+ u32 level) { return ERR_PTR(-EOPNOTSUPP); }
+static inline void
+mlx5_chains_put_table(struct mlx5_fs_chains *chains, u32 chain, u32 prio,
+ u32 level) {};
+
+static inline struct mlx5_flow_table *
+mlx5_chains_get_tc_end_ft(struct mlx5_fs_chains *chains) { return ERR_PTR(-EOPNOTSUPP); }
+
+static inline struct mlx5_fs_chains *
+mlx5_chains_create(struct mlx5_core_dev *dev, struct mlx5_chains_attr *attr)
+{ return NULL; }
+static inline void
+mlx5_chains_destroy(struct mlx5_fs_chains *chains) {};
+
+#endif /* CONFIG_MLX5_CLS_ACT */
+
+#endif /* __ML5_ESW_CHAINS_H__ */
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