diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlxsw/spectrum2_mr_tcam.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlxsw/spectrum2_mr_tcam.c | 330 |
1 files changed, 330 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum2_mr_tcam.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum2_mr_tcam.c new file mode 100644 index 000000000..b1178b7a7 --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum2_mr_tcam.c @@ -0,0 +1,330 @@ +// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 +/* Copyright (c) 2018 Mellanox Technologies. All rights reserved */ + +#include <linux/kernel.h> + +#include "core_acl_flex_actions.h" +#include "spectrum.h" +#include "spectrum_mr.h" + +struct mlxsw_sp2_mr_tcam { + struct mlxsw_sp *mlxsw_sp; + struct mlxsw_sp_flow_block *flow_block; + struct mlxsw_sp_acl_ruleset *ruleset4; + struct mlxsw_sp_acl_ruleset *ruleset6; +}; + +struct mlxsw_sp2_mr_route { + struct mlxsw_sp2_mr_tcam *mr_tcam; +}; + +static struct mlxsw_sp_acl_ruleset * +mlxsw_sp2_mr_tcam_proto_ruleset(struct mlxsw_sp2_mr_tcam *mr_tcam, + enum mlxsw_sp_l3proto proto) +{ + switch (proto) { + case MLXSW_SP_L3_PROTO_IPV4: + return mr_tcam->ruleset4; + case MLXSW_SP_L3_PROTO_IPV6: + return mr_tcam->ruleset6; + } + return NULL; +} + +static int mlxsw_sp2_mr_tcam_bind_group(struct mlxsw_sp *mlxsw_sp, + enum mlxsw_reg_pemrbt_protocol protocol, + struct mlxsw_sp_acl_ruleset *ruleset) +{ + char pemrbt_pl[MLXSW_REG_PEMRBT_LEN]; + u16 group_id; + + group_id = mlxsw_sp_acl_ruleset_group_id(ruleset); + + mlxsw_reg_pemrbt_pack(pemrbt_pl, protocol, group_id); + return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(pemrbt), pemrbt_pl); +} + +static const enum mlxsw_afk_element mlxsw_sp2_mr_tcam_usage_ipv4[] = { + MLXSW_AFK_ELEMENT_VIRT_ROUTER_MSB, + MLXSW_AFK_ELEMENT_VIRT_ROUTER_LSB, + MLXSW_AFK_ELEMENT_SRC_IP_0_31, + MLXSW_AFK_ELEMENT_DST_IP_0_31, +}; + +static int mlxsw_sp2_mr_tcam_ipv4_init(struct mlxsw_sp2_mr_tcam *mr_tcam) +{ + struct mlxsw_afk_element_usage elusage; + int err; + + /* Initialize IPv4 ACL group. */ + mlxsw_afk_element_usage_fill(&elusage, + mlxsw_sp2_mr_tcam_usage_ipv4, + ARRAY_SIZE(mlxsw_sp2_mr_tcam_usage_ipv4)); + mr_tcam->ruleset4 = mlxsw_sp_acl_ruleset_get(mr_tcam->mlxsw_sp, + mr_tcam->flow_block, + MLXSW_SP_L3_PROTO_IPV4, + MLXSW_SP_ACL_PROFILE_MR, + &elusage); + + if (IS_ERR(mr_tcam->ruleset4)) + return PTR_ERR(mr_tcam->ruleset4); + + /* MC Router groups should be bound before routes are inserted. */ + err = mlxsw_sp2_mr_tcam_bind_group(mr_tcam->mlxsw_sp, + MLXSW_REG_PEMRBT_PROTO_IPV4, + mr_tcam->ruleset4); + if (err) + goto err_bind_group; + + return 0; + +err_bind_group: + mlxsw_sp_acl_ruleset_put(mr_tcam->mlxsw_sp, mr_tcam->ruleset4); + return err; +} + +static void mlxsw_sp2_mr_tcam_ipv4_fini(struct mlxsw_sp2_mr_tcam *mr_tcam) +{ + mlxsw_sp_acl_ruleset_put(mr_tcam->mlxsw_sp, mr_tcam->ruleset4); +} + +static const enum mlxsw_afk_element mlxsw_sp2_mr_tcam_usage_ipv6[] = { + MLXSW_AFK_ELEMENT_VIRT_ROUTER_MSB, + MLXSW_AFK_ELEMENT_VIRT_ROUTER_LSB, + MLXSW_AFK_ELEMENT_SRC_IP_96_127, + MLXSW_AFK_ELEMENT_SRC_IP_64_95, + MLXSW_AFK_ELEMENT_SRC_IP_32_63, + MLXSW_AFK_ELEMENT_SRC_IP_0_31, + MLXSW_AFK_ELEMENT_DST_IP_96_127, + MLXSW_AFK_ELEMENT_DST_IP_64_95, + MLXSW_AFK_ELEMENT_DST_IP_32_63, + MLXSW_AFK_ELEMENT_DST_IP_0_31, +}; + +static int mlxsw_sp2_mr_tcam_ipv6_init(struct mlxsw_sp2_mr_tcam *mr_tcam) +{ + struct mlxsw_afk_element_usage elusage; + int err; + + /* Initialize IPv6 ACL group */ + mlxsw_afk_element_usage_fill(&elusage, + mlxsw_sp2_mr_tcam_usage_ipv6, + ARRAY_SIZE(mlxsw_sp2_mr_tcam_usage_ipv6)); + mr_tcam->ruleset6 = mlxsw_sp_acl_ruleset_get(mr_tcam->mlxsw_sp, + mr_tcam->flow_block, + MLXSW_SP_L3_PROTO_IPV6, + MLXSW_SP_ACL_PROFILE_MR, + &elusage); + + if (IS_ERR(mr_tcam->ruleset6)) + return PTR_ERR(mr_tcam->ruleset6); + + /* MC Router groups should be bound before routes are inserted. */ + err = mlxsw_sp2_mr_tcam_bind_group(mr_tcam->mlxsw_sp, + MLXSW_REG_PEMRBT_PROTO_IPV6, + mr_tcam->ruleset6); + if (err) + goto err_bind_group; + + return 0; + +err_bind_group: + mlxsw_sp_acl_ruleset_put(mr_tcam->mlxsw_sp, mr_tcam->ruleset6); + return err; +} + +static void mlxsw_sp2_mr_tcam_ipv6_fini(struct mlxsw_sp2_mr_tcam *mr_tcam) +{ + mlxsw_sp_acl_ruleset_put(mr_tcam->mlxsw_sp, mr_tcam->ruleset6); +} + +static void +mlxsw_sp2_mr_tcam_rule_parse4(struct mlxsw_sp_acl_rule_info *rulei, + struct mlxsw_sp_mr_route_key *key) +{ + mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_SRC_IP_0_31, + (char *) &key->source.addr4, + (char *) &key->source_mask.addr4, 4); + mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_DST_IP_0_31, + (char *) &key->group.addr4, + (char *) &key->group_mask.addr4, 4); +} + +static void +mlxsw_sp2_mr_tcam_rule_parse6(struct mlxsw_sp_acl_rule_info *rulei, + struct mlxsw_sp_mr_route_key *key) +{ + mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_SRC_IP_96_127, + &key->source.addr6.s6_addr[0x0], + &key->source_mask.addr6.s6_addr[0x0], 4); + mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_SRC_IP_64_95, + &key->source.addr6.s6_addr[0x4], + &key->source_mask.addr6.s6_addr[0x4], 4); + mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_SRC_IP_32_63, + &key->source.addr6.s6_addr[0x8], + &key->source_mask.addr6.s6_addr[0x8], 4); + mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_SRC_IP_0_31, + &key->source.addr6.s6_addr[0xc], + &key->source_mask.addr6.s6_addr[0xc], 4); + mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_DST_IP_96_127, + &key->group.addr6.s6_addr[0x0], + &key->group_mask.addr6.s6_addr[0x0], 4); + mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_DST_IP_64_95, + &key->group.addr6.s6_addr[0x4], + &key->group_mask.addr6.s6_addr[0x4], 4); + mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_DST_IP_32_63, + &key->group.addr6.s6_addr[0x8], + &key->group_mask.addr6.s6_addr[0x8], 4); + mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_DST_IP_0_31, + &key->group.addr6.s6_addr[0xc], + &key->group_mask.addr6.s6_addr[0xc], 4); +} + +static void +mlxsw_sp2_mr_tcam_rule_parse(struct mlxsw_sp_acl_rule *rule, + struct mlxsw_sp_mr_route_key *key, + unsigned int priority) +{ + struct mlxsw_sp_acl_rule_info *rulei; + + rulei = mlxsw_sp_acl_rule_rulei(rule); + rulei->priority = priority; + mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_VIRT_ROUTER_LSB, + key->vrid, GENMASK(7, 0)); + mlxsw_sp_acl_rulei_keymask_u32(rulei, + MLXSW_AFK_ELEMENT_VIRT_ROUTER_MSB, + key->vrid >> 8, GENMASK(3, 0)); + switch (key->proto) { + case MLXSW_SP_L3_PROTO_IPV4: + return mlxsw_sp2_mr_tcam_rule_parse4(rulei, key); + case MLXSW_SP_L3_PROTO_IPV6: + return mlxsw_sp2_mr_tcam_rule_parse6(rulei, key); + } +} + +static int +mlxsw_sp2_mr_tcam_route_create(struct mlxsw_sp *mlxsw_sp, void *priv, + void *route_priv, + struct mlxsw_sp_mr_route_key *key, + struct mlxsw_afa_block *afa_block, + enum mlxsw_sp_mr_route_prio prio) +{ + struct mlxsw_sp2_mr_route *mr_route = route_priv; + struct mlxsw_sp2_mr_tcam *mr_tcam = priv; + struct mlxsw_sp_acl_ruleset *ruleset; + struct mlxsw_sp_acl_rule *rule; + int err; + + mr_route->mr_tcam = mr_tcam; + ruleset = mlxsw_sp2_mr_tcam_proto_ruleset(mr_tcam, key->proto); + if (WARN_ON(!ruleset)) + return -EINVAL; + + rule = mlxsw_sp_acl_rule_create(mlxsw_sp, ruleset, + (unsigned long) route_priv, afa_block, + NULL); + if (IS_ERR(rule)) + return PTR_ERR(rule); + + mlxsw_sp2_mr_tcam_rule_parse(rule, key, prio); + err = mlxsw_sp_acl_rule_add(mlxsw_sp, rule); + if (err) + goto err_rule_add; + + return 0; + +err_rule_add: + mlxsw_sp_acl_rule_destroy(mlxsw_sp, rule); + return err; +} + +static void +mlxsw_sp2_mr_tcam_route_destroy(struct mlxsw_sp *mlxsw_sp, void *priv, + void *route_priv, + struct mlxsw_sp_mr_route_key *key) +{ + struct mlxsw_sp2_mr_tcam *mr_tcam = priv; + struct mlxsw_sp_acl_ruleset *ruleset; + struct mlxsw_sp_acl_rule *rule; + + ruleset = mlxsw_sp2_mr_tcam_proto_ruleset(mr_tcam, key->proto); + if (WARN_ON(!ruleset)) + return; + + rule = mlxsw_sp_acl_rule_lookup(mlxsw_sp, ruleset, + (unsigned long) route_priv); + if (WARN_ON(!rule)) + return; + + mlxsw_sp_acl_rule_del(mlxsw_sp, rule); + mlxsw_sp_acl_rule_destroy(mlxsw_sp, rule); +} + +static int +mlxsw_sp2_mr_tcam_route_update(struct mlxsw_sp *mlxsw_sp, + void *route_priv, + struct mlxsw_sp_mr_route_key *key, + struct mlxsw_afa_block *afa_block) +{ + struct mlxsw_sp2_mr_route *mr_route = route_priv; + struct mlxsw_sp2_mr_tcam *mr_tcam = mr_route->mr_tcam; + struct mlxsw_sp_acl_ruleset *ruleset; + struct mlxsw_sp_acl_rule *rule; + + ruleset = mlxsw_sp2_mr_tcam_proto_ruleset(mr_tcam, key->proto); + if (WARN_ON(!ruleset)) + return -EINVAL; + + rule = mlxsw_sp_acl_rule_lookup(mlxsw_sp, ruleset, + (unsigned long) route_priv); + if (WARN_ON(!rule)) + return -EINVAL; + + return mlxsw_sp_acl_rule_action_replace(mlxsw_sp, rule, afa_block); +} + +static int mlxsw_sp2_mr_tcam_init(struct mlxsw_sp *mlxsw_sp, void *priv) +{ + struct mlxsw_sp2_mr_tcam *mr_tcam = priv; + int err; + + mr_tcam->mlxsw_sp = mlxsw_sp; + mr_tcam->flow_block = mlxsw_sp_flow_block_create(mlxsw_sp, NULL); + if (!mr_tcam->flow_block) + return -ENOMEM; + + err = mlxsw_sp2_mr_tcam_ipv4_init(mr_tcam); + if (err) + goto err_ipv4_init; + + err = mlxsw_sp2_mr_tcam_ipv6_init(mr_tcam); + if (err) + goto err_ipv6_init; + + return 0; + +err_ipv6_init: + mlxsw_sp2_mr_tcam_ipv4_fini(mr_tcam); +err_ipv4_init: + mlxsw_sp_flow_block_destroy(mr_tcam->flow_block); + return err; +} + +static void mlxsw_sp2_mr_tcam_fini(void *priv) +{ + struct mlxsw_sp2_mr_tcam *mr_tcam = priv; + + mlxsw_sp2_mr_tcam_ipv6_fini(mr_tcam); + mlxsw_sp2_mr_tcam_ipv4_fini(mr_tcam); + mlxsw_sp_flow_block_destroy(mr_tcam->flow_block); +} + +const struct mlxsw_sp_mr_tcam_ops mlxsw_sp2_mr_tcam_ops = { + .priv_size = sizeof(struct mlxsw_sp2_mr_tcam), + .init = mlxsw_sp2_mr_tcam_init, + .fini = mlxsw_sp2_mr_tcam_fini, + .route_priv_size = sizeof(struct mlxsw_sp2_mr_route), + .route_create = mlxsw_sp2_mr_tcam_route_create, + .route_destroy = mlxsw_sp2_mr_tcam_route_destroy, + .route_update = mlxsw_sp2_mr_tcam_route_update, +}; |