diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/lib/fs_ttc.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/lib/fs_ttc.c | 602 |
1 files changed, 602 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/fs_ttc.c b/drivers/net/ethernet/mellanox/mlx5/core/lib/fs_ttc.c new file mode 100644 index 000000000000..749d17c0057d --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/fs_ttc.c @@ -0,0 +1,602 @@ +// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB +// Copyright (c) 2021 NVIDIA CORPORATION & AFFILIATES. + +#include <linux/ip.h> +#include <linux/ipv6.h> +#include <linux/tcp.h> +#include <linux/mlx5/fs.h> +#include <linux/mlx5/driver.h> +#include "mlx5_core.h" +#include "lib/fs_ttc.h" + +#define MLX5_TTC_NUM_GROUPS 3 +#define MLX5_TTC_GROUP1_SIZE (BIT(3) + MLX5_NUM_TUNNEL_TT) +#define MLX5_TTC_GROUP2_SIZE BIT(1) +#define MLX5_TTC_GROUP3_SIZE BIT(0) +#define MLX5_TTC_TABLE_SIZE (MLX5_TTC_GROUP1_SIZE +\ + MLX5_TTC_GROUP2_SIZE +\ + MLX5_TTC_GROUP3_SIZE) + +#define MLX5_INNER_TTC_NUM_GROUPS 3 +#define MLX5_INNER_TTC_GROUP1_SIZE BIT(3) +#define MLX5_INNER_TTC_GROUP2_SIZE BIT(1) +#define MLX5_INNER_TTC_GROUP3_SIZE BIT(0) +#define MLX5_INNER_TTC_TABLE_SIZE (MLX5_INNER_TTC_GROUP1_SIZE +\ + MLX5_INNER_TTC_GROUP2_SIZE +\ + MLX5_INNER_TTC_GROUP3_SIZE) + +/* L3/L4 traffic type classifier */ +struct mlx5_ttc_table { + int num_groups; + struct mlx5_flow_table *t; + struct mlx5_flow_group **g; + struct mlx5_ttc_rule rules[MLX5_NUM_TT]; + struct mlx5_flow_handle *tunnel_rules[MLX5_NUM_TUNNEL_TT]; +}; + +struct mlx5_flow_table *mlx5_get_ttc_flow_table(struct mlx5_ttc_table *ttc) +{ + return ttc->t; +} + +static void mlx5_cleanup_ttc_rules(struct mlx5_ttc_table *ttc) +{ + int i; + + for (i = 0; i < MLX5_NUM_TT; i++) { + if (!IS_ERR_OR_NULL(ttc->rules[i].rule)) { + mlx5_del_flow_rules(ttc->rules[i].rule); + ttc->rules[i].rule = NULL; + } + } + + for (i = 0; i < MLX5_NUM_TUNNEL_TT; i++) { + if (!IS_ERR_OR_NULL(ttc->tunnel_rules[i])) { + mlx5_del_flow_rules(ttc->tunnel_rules[i]); + ttc->tunnel_rules[i] = NULL; + } + } +} + +struct mlx5_etype_proto { + u16 etype; + u8 proto; +}; + +static struct mlx5_etype_proto ttc_rules[] = { + [MLX5_TT_IPV4_TCP] = { + .etype = ETH_P_IP, + .proto = IPPROTO_TCP, + }, + [MLX5_TT_IPV6_TCP] = { + .etype = ETH_P_IPV6, + .proto = IPPROTO_TCP, + }, + [MLX5_TT_IPV4_UDP] = { + .etype = ETH_P_IP, + .proto = IPPROTO_UDP, + }, + [MLX5_TT_IPV6_UDP] = { + .etype = ETH_P_IPV6, + .proto = IPPROTO_UDP, + }, + [MLX5_TT_IPV4_IPSEC_AH] = { + .etype = ETH_P_IP, + .proto = IPPROTO_AH, + }, + [MLX5_TT_IPV6_IPSEC_AH] = { + .etype = ETH_P_IPV6, + .proto = IPPROTO_AH, + }, + [MLX5_TT_IPV4_IPSEC_ESP] = { + .etype = ETH_P_IP, + .proto = IPPROTO_ESP, + }, + [MLX5_TT_IPV6_IPSEC_ESP] = { + .etype = ETH_P_IPV6, + .proto = IPPROTO_ESP, + }, + [MLX5_TT_IPV4] = { + .etype = ETH_P_IP, + .proto = 0, + }, + [MLX5_TT_IPV6] = { + .etype = ETH_P_IPV6, + .proto = 0, + }, + [MLX5_TT_ANY] = { + .etype = 0, + .proto = 0, + }, +}; + +static struct mlx5_etype_proto ttc_tunnel_rules[] = { + [MLX5_TT_IPV4_GRE] = { + .etype = ETH_P_IP, + .proto = IPPROTO_GRE, + }, + [MLX5_TT_IPV6_GRE] = { + .etype = ETH_P_IPV6, + .proto = IPPROTO_GRE, + }, + [MLX5_TT_IPV4_IPIP] = { + .etype = ETH_P_IP, + .proto = IPPROTO_IPIP, + }, + [MLX5_TT_IPV6_IPIP] = { + .etype = ETH_P_IPV6, + .proto = IPPROTO_IPIP, + }, + [MLX5_TT_IPV4_IPV6] = { + .etype = ETH_P_IP, + .proto = IPPROTO_IPV6, + }, + [MLX5_TT_IPV6_IPV6] = { + .etype = ETH_P_IPV6, + .proto = IPPROTO_IPV6, + }, + +}; + +u8 mlx5_get_proto_by_tunnel_type(enum mlx5_tunnel_types tt) +{ + return ttc_tunnel_rules[tt].proto; +} + +static bool mlx5_tunnel_proto_supported_rx(struct mlx5_core_dev *mdev, + u8 proto_type) +{ + switch (proto_type) { + case IPPROTO_GRE: + return MLX5_CAP_ETH(mdev, tunnel_stateless_gre); + case IPPROTO_IPIP: + case IPPROTO_IPV6: + return (MLX5_CAP_ETH(mdev, tunnel_stateless_ip_over_ip) || + MLX5_CAP_ETH(mdev, tunnel_stateless_ip_over_ip_rx)); + default: + return false; + } +} + +static bool mlx5_tunnel_any_rx_proto_supported(struct mlx5_core_dev *mdev) +{ + int tt; + + for (tt = 0; tt < MLX5_NUM_TUNNEL_TT; tt++) { + if (mlx5_tunnel_proto_supported_rx(mdev, + ttc_tunnel_rules[tt].proto)) + return true; + } + return false; +} + +bool mlx5_tunnel_inner_ft_supported(struct mlx5_core_dev *mdev) +{ + return (mlx5_tunnel_any_rx_proto_supported(mdev) && + MLX5_CAP_FLOWTABLE_NIC_RX(mdev, + ft_field_support.inner_ip_version)); +} + +static u8 mlx5_etype_to_ipv(u16 ethertype) +{ + if (ethertype == ETH_P_IP) + return 4; + + if (ethertype == ETH_P_IPV6) + return 6; + + return 0; +} + +static struct mlx5_flow_handle * +mlx5_generate_ttc_rule(struct mlx5_core_dev *dev, struct mlx5_flow_table *ft, + struct mlx5_flow_destination *dest, u16 etype, u8 proto) +{ + int match_ipv_outer = + MLX5_CAP_FLOWTABLE_NIC_RX(dev, + ft_field_support.outer_ip_version); + MLX5_DECLARE_FLOW_ACT(flow_act); + struct mlx5_flow_handle *rule; + struct mlx5_flow_spec *spec; + int err = 0; + u8 ipv; + + spec = kvzalloc(sizeof(*spec), GFP_KERNEL); + if (!spec) + return ERR_PTR(-ENOMEM); + + if (proto) { + spec->match_criteria_enable = MLX5_MATCH_OUTER_HEADERS; + MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria, outer_headers.ip_protocol); + MLX5_SET(fte_match_param, spec->match_value, outer_headers.ip_protocol, proto); + } + + ipv = mlx5_etype_to_ipv(etype); + if (match_ipv_outer && ipv) { + spec->match_criteria_enable = MLX5_MATCH_OUTER_HEADERS; + MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria, outer_headers.ip_version); + MLX5_SET(fte_match_param, spec->match_value, outer_headers.ip_version, ipv); + } else if (etype) { + spec->match_criteria_enable = MLX5_MATCH_OUTER_HEADERS; + MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria, outer_headers.ethertype); + MLX5_SET(fte_match_param, spec->match_value, outer_headers.ethertype, etype); + } + + rule = mlx5_add_flow_rules(ft, spec, &flow_act, dest, 1); + if (IS_ERR(rule)) { + err = PTR_ERR(rule); + mlx5_core_err(dev, "%s: add rule failed\n", __func__); + } + + kvfree(spec); + return err ? ERR_PTR(err) : rule; +} + +static int mlx5_generate_ttc_table_rules(struct mlx5_core_dev *dev, + struct ttc_params *params, + struct mlx5_ttc_table *ttc) +{ + struct mlx5_flow_handle **trules; + struct mlx5_ttc_rule *rules; + struct mlx5_flow_table *ft; + int tt; + int err; + + ft = ttc->t; + rules = ttc->rules; + for (tt = 0; tt < MLX5_NUM_TT; tt++) { + struct mlx5_ttc_rule *rule = &rules[tt]; + + rule->rule = mlx5_generate_ttc_rule(dev, ft, ¶ms->dests[tt], + ttc_rules[tt].etype, + ttc_rules[tt].proto); + if (IS_ERR(rule->rule)) { + err = PTR_ERR(rule->rule); + rule->rule = NULL; + goto del_rules; + } + rule->default_dest = params->dests[tt]; + } + + if (!params->inner_ttc || !mlx5_tunnel_inner_ft_supported(dev)) + return 0; + + trules = ttc->tunnel_rules; + for (tt = 0; tt < MLX5_NUM_TUNNEL_TT; tt++) { + if (!mlx5_tunnel_proto_supported_rx(dev, + ttc_tunnel_rules[tt].proto)) + continue; + trules[tt] = mlx5_generate_ttc_rule(dev, ft, + ¶ms->tunnel_dests[tt], + ttc_tunnel_rules[tt].etype, + ttc_tunnel_rules[tt].proto); + if (IS_ERR(trules[tt])) { + err = PTR_ERR(trules[tt]); + trules[tt] = NULL; + goto del_rules; + } + } + + return 0; + +del_rules: + mlx5_cleanup_ttc_rules(ttc); + return err; +} + +static int mlx5_create_ttc_table_groups(struct mlx5_ttc_table *ttc, + bool use_ipv) +{ + int inlen = MLX5_ST_SZ_BYTES(create_flow_group_in); + int ix = 0; + u32 *in; + int err; + u8 *mc; + + ttc->g = kcalloc(MLX5_TTC_NUM_GROUPS, sizeof(*ttc->g), GFP_KERNEL); + if (!ttc->g) + return -ENOMEM; + in = kvzalloc(inlen, GFP_KERNEL); + if (!in) { + kfree(ttc->g); + ttc->g = NULL; + return -ENOMEM; + } + + /* L4 Group */ + mc = MLX5_ADDR_OF(create_flow_group_in, in, match_criteria); + MLX5_SET_TO_ONES(fte_match_param, mc, outer_headers.ip_protocol); + if (use_ipv) + MLX5_SET_TO_ONES(fte_match_param, mc, outer_headers.ip_version); + else + MLX5_SET_TO_ONES(fte_match_param, mc, outer_headers.ethertype); + MLX5_SET_CFG(in, match_criteria_enable, MLX5_MATCH_OUTER_HEADERS); + MLX5_SET_CFG(in, start_flow_index, ix); + ix += MLX5_TTC_GROUP1_SIZE; + MLX5_SET_CFG(in, end_flow_index, ix - 1); + ttc->g[ttc->num_groups] = mlx5_create_flow_group(ttc->t, in); + if (IS_ERR(ttc->g[ttc->num_groups])) + goto err; + ttc->num_groups++; + + /* L3 Group */ + MLX5_SET(fte_match_param, mc, outer_headers.ip_protocol, 0); + MLX5_SET_CFG(in, start_flow_index, ix); + ix += MLX5_TTC_GROUP2_SIZE; + MLX5_SET_CFG(in, end_flow_index, ix - 1); + ttc->g[ttc->num_groups] = mlx5_create_flow_group(ttc->t, in); + if (IS_ERR(ttc->g[ttc->num_groups])) + goto err; + ttc->num_groups++; + + /* Any Group */ + memset(in, 0, inlen); + MLX5_SET_CFG(in, start_flow_index, ix); + ix += MLX5_TTC_GROUP3_SIZE; + MLX5_SET_CFG(in, end_flow_index, ix - 1); + ttc->g[ttc->num_groups] = mlx5_create_flow_group(ttc->t, in); + if (IS_ERR(ttc->g[ttc->num_groups])) + goto err; + ttc->num_groups++; + + kvfree(in); + return 0; + +err: + err = PTR_ERR(ttc->g[ttc->num_groups]); + ttc->g[ttc->num_groups] = NULL; + kvfree(in); + + return err; +} + +static struct mlx5_flow_handle * +mlx5_generate_inner_ttc_rule(struct mlx5_core_dev *dev, + struct mlx5_flow_table *ft, + struct mlx5_flow_destination *dest, + u16 etype, u8 proto) +{ + MLX5_DECLARE_FLOW_ACT(flow_act); + struct mlx5_flow_handle *rule; + struct mlx5_flow_spec *spec; + int err = 0; + u8 ipv; + + spec = kvzalloc(sizeof(*spec), GFP_KERNEL); + if (!spec) + return ERR_PTR(-ENOMEM); + + ipv = mlx5_etype_to_ipv(etype); + if (etype && ipv) { + spec->match_criteria_enable = MLX5_MATCH_INNER_HEADERS; + MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria, inner_headers.ip_version); + MLX5_SET(fte_match_param, spec->match_value, inner_headers.ip_version, ipv); + } + + if (proto) { + spec->match_criteria_enable = MLX5_MATCH_INNER_HEADERS; + MLX5_SET_TO_ONES(fte_match_param, spec->match_criteria, inner_headers.ip_protocol); + MLX5_SET(fte_match_param, spec->match_value, inner_headers.ip_protocol, proto); + } + + rule = mlx5_add_flow_rules(ft, spec, &flow_act, dest, 1); + if (IS_ERR(rule)) { + err = PTR_ERR(rule); + mlx5_core_err(dev, "%s: add inner TTC rule failed\n", __func__); + } + + kvfree(spec); + return err ? ERR_PTR(err) : rule; +} + +static int mlx5_generate_inner_ttc_table_rules(struct mlx5_core_dev *dev, + struct ttc_params *params, + struct mlx5_ttc_table *ttc) +{ + struct mlx5_ttc_rule *rules; + struct mlx5_flow_table *ft; + int err; + int tt; + + ft = ttc->t; + rules = ttc->rules; + + for (tt = 0; tt < MLX5_NUM_TT; tt++) { + struct mlx5_ttc_rule *rule = &rules[tt]; + + rule->rule = mlx5_generate_inner_ttc_rule(dev, ft, + ¶ms->dests[tt], + ttc_rules[tt].etype, + ttc_rules[tt].proto); + if (IS_ERR(rule->rule)) { + err = PTR_ERR(rule->rule); + rule->rule = NULL; + goto del_rules; + } + rule->default_dest = params->dests[tt]; + } + + return 0; + +del_rules: + + mlx5_cleanup_ttc_rules(ttc); + return err; +} + +static int mlx5_create_inner_ttc_table_groups(struct mlx5_ttc_table *ttc) +{ + int inlen = MLX5_ST_SZ_BYTES(create_flow_group_in); + int ix = 0; + u32 *in; + int err; + u8 *mc; + + ttc->g = kcalloc(MLX5_INNER_TTC_NUM_GROUPS, sizeof(*ttc->g), + GFP_KERNEL); + if (!ttc->g) + return -ENOMEM; + in = kvzalloc(inlen, GFP_KERNEL); + if (!in) { + kfree(ttc->g); + ttc->g = NULL; + return -ENOMEM; + } + + /* L4 Group */ + mc = MLX5_ADDR_OF(create_flow_group_in, in, match_criteria); + MLX5_SET_TO_ONES(fte_match_param, mc, inner_headers.ip_protocol); + MLX5_SET_TO_ONES(fte_match_param, mc, inner_headers.ip_version); + MLX5_SET_CFG(in, match_criteria_enable, MLX5_MATCH_INNER_HEADERS); + MLX5_SET_CFG(in, start_flow_index, ix); + ix += MLX5_INNER_TTC_GROUP1_SIZE; + MLX5_SET_CFG(in, end_flow_index, ix - 1); + ttc->g[ttc->num_groups] = mlx5_create_flow_group(ttc->t, in); + if (IS_ERR(ttc->g[ttc->num_groups])) + goto err; + ttc->num_groups++; + + /* L3 Group */ + MLX5_SET(fte_match_param, mc, inner_headers.ip_protocol, 0); + MLX5_SET_CFG(in, start_flow_index, ix); + ix += MLX5_INNER_TTC_GROUP2_SIZE; + MLX5_SET_CFG(in, end_flow_index, ix - 1); + ttc->g[ttc->num_groups] = mlx5_create_flow_group(ttc->t, in); + if (IS_ERR(ttc->g[ttc->num_groups])) + goto err; + ttc->num_groups++; + + /* Any Group */ + memset(in, 0, inlen); + MLX5_SET_CFG(in, start_flow_index, ix); + ix += MLX5_INNER_TTC_GROUP3_SIZE; + MLX5_SET_CFG(in, end_flow_index, ix - 1); + ttc->g[ttc->num_groups] = mlx5_create_flow_group(ttc->t, in); + if (IS_ERR(ttc->g[ttc->num_groups])) + goto err; + ttc->num_groups++; + + kvfree(in); + return 0; + +err: + err = PTR_ERR(ttc->g[ttc->num_groups]); + ttc->g[ttc->num_groups] = NULL; + kvfree(in); + + return err; +} + +struct mlx5_ttc_table *mlx5_create_inner_ttc_table(struct mlx5_core_dev *dev, + struct ttc_params *params) +{ + struct mlx5_ttc_table *ttc; + int err; + + ttc = kvzalloc(sizeof(*ttc), GFP_KERNEL); + if (!ttc) + return ERR_PTR(-ENOMEM); + + WARN_ON_ONCE(params->ft_attr.max_fte); + params->ft_attr.max_fte = MLX5_INNER_TTC_TABLE_SIZE; + ttc->t = mlx5_create_flow_table(params->ns, ¶ms->ft_attr); + if (IS_ERR(ttc->t)) { + err = PTR_ERR(ttc->t); + kvfree(ttc); + return ERR_PTR(err); + } + + err = mlx5_create_inner_ttc_table_groups(ttc); + if (err) + goto destroy_ft; + + err = mlx5_generate_inner_ttc_table_rules(dev, params, ttc); + if (err) + goto destroy_ft; + + return ttc; + +destroy_ft: + mlx5_destroy_ttc_table(ttc); + return ERR_PTR(err); +} + +void mlx5_destroy_ttc_table(struct mlx5_ttc_table *ttc) +{ + int i; + + mlx5_cleanup_ttc_rules(ttc); + for (i = ttc->num_groups - 1; i >= 0; i--) { + if (!IS_ERR_OR_NULL(ttc->g[i])) + mlx5_destroy_flow_group(ttc->g[i]); + ttc->g[i] = NULL; + } + + kfree(ttc->g); + mlx5_destroy_flow_table(ttc->t); + kvfree(ttc); +} + +struct mlx5_ttc_table *mlx5_create_ttc_table(struct mlx5_core_dev *dev, + struct ttc_params *params) +{ + bool match_ipv_outer = + MLX5_CAP_FLOWTABLE_NIC_RX(dev, + ft_field_support.outer_ip_version); + struct mlx5_ttc_table *ttc; + int err; + + ttc = kvzalloc(sizeof(*ttc), GFP_KERNEL); + if (!ttc) + return ERR_PTR(-ENOMEM); + + WARN_ON_ONCE(params->ft_attr.max_fte); + params->ft_attr.max_fte = MLX5_TTC_TABLE_SIZE; + ttc->t = mlx5_create_flow_table(params->ns, ¶ms->ft_attr); + if (IS_ERR(ttc->t)) { + err = PTR_ERR(ttc->t); + kvfree(ttc); + return ERR_PTR(err); + } + + err = mlx5_create_ttc_table_groups(ttc, match_ipv_outer); + if (err) + goto destroy_ft; + + err = mlx5_generate_ttc_table_rules(dev, params, ttc); + if (err) + goto destroy_ft; + + return ttc; + +destroy_ft: + mlx5_destroy_ttc_table(ttc); + return ERR_PTR(err); +} + +int mlx5_ttc_fwd_dest(struct mlx5_ttc_table *ttc, enum mlx5_traffic_types type, + struct mlx5_flow_destination *new_dest) +{ + return mlx5_modify_rule_destination(ttc->rules[type].rule, new_dest, + NULL); +} + +struct mlx5_flow_destination +mlx5_ttc_get_default_dest(struct mlx5_ttc_table *ttc, + enum mlx5_traffic_types type) +{ + struct mlx5_flow_destination *dest = &ttc->rules[type].default_dest; + + WARN_ONCE(dest->type != MLX5_FLOW_DESTINATION_TYPE_TIR, + "TTC[%d] default dest is not setup yet", type); + + return *dest; +} + +int mlx5_ttc_fwd_default_dest(struct mlx5_ttc_table *ttc, + enum mlx5_traffic_types type) +{ + struct mlx5_flow_destination dest = mlx5_ttc_get_default_dest(ttc, type); + + return mlx5_ttc_fwd_dest(ttc, type, &dest); +} |