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mlxsw: spectrum_dpipe: Add adjacency group size 

The adjacency group size is part of the match on the adjacency group and
should therefore be exposed using dpipe.

When non-equal-cost multi-path support will be introduced, the group's
size will help users understand the exact number of adjacency entries
each nexthop occupies, as a nexthop will no longer correspond to a
single entry.

The output for a multi-path route with two nexthops, one with weight 255
and the second 1 will be:

Example:

$ devlink dpipe table dump pci/0000:01:00.0 name mlxsw_adj
pci/0000:01:00.0:
  index 0
  match_value:
    type field_exact header mlxsw_meta field adj_index value 65536
    type field_exact header mlxsw_meta field adj_size value 512
    type field_exact header mlxsw_meta field adj_hash_index value 0
  action_value:
    type field_modify header ethernet field destination mac value e4:1d:2d:a5:f3:64
    type field_modify header mlxsw_meta field erif_port mapping ifindex mapping_value 3 value 1

  index 1
  match_value:
    type field_exact header mlxsw_meta field adj_index value 65536
    type field_exact header mlxsw_meta field adj_size value 512
    type field_exact header mlxsw_meta field adj_hash_index value 510
  action_value:
    type field_modify header ethernet field destination mac value e4:1d:2d:a5:f3:65
    type field_modify header mlxsw_meta field erif_port mapping ifindex mapping_value 4 value 2

Thus, the first nexthop occupies 510 adjacency entries and the second 2,
which leads to a ratio of 255 to 1.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel 2017-10-22 23:11:43 +02:00 committed by David S. Miller
parent bc9db4171d
commit e69cd9d75e
3 changed files with 44 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
drivers/net/ethernet/mellanox/mlxsw/spectrum_dpipe.c
View File

@ -44,6 +44,7 @@ enum mlxsw_sp_field_metadata_id {
MLXSW_SP_DPIPE_FIELD_METADATA_L3_FORWARD,
MLXSW_SP_DPIPE_FIELD_METADATA_L3_DROP,
MLXSW_SP_DPIPE_FIELD_METADATA_ADJ_INDEX,
MLXSW_SP_DPIPE_FIELD_METADATA_ADJ_SIZE,
MLXSW_SP_DPIPE_FIELD_METADATA_ADJ_HASH_INDEX,
};
@ -69,6 +70,11 @@ static struct devlink_dpipe_field mlxsw_sp_dpipe_fields_metadata[] = {
.id = MLXSW_SP_DPIPE_FIELD_METADATA_ADJ_INDEX,
.bitwidth = 32,
},
{
.name = "adj_size",
.id = MLXSW_SP_DPIPE_FIELD_METADATA_ADJ_SIZE,
.bitwidth = 32,
},
{
.name = "adj_hash_index",
.id = MLXSW_SP_DPIPE_FIELD_METADATA_ADJ_HASH_INDEX,
@ -851,6 +857,14 @@ static int mlxsw_sp_dpipe_table_adj_matches_dump(void *priv,
match.header = &mlxsw_sp_dpipe_header_metadata;
match.field_id = MLXSW_SP_DPIPE_FIELD_METADATA_ADJ_INDEX;
err = devlink_dpipe_match_put(skb, &match);
if (err)
return err;
match.type = DEVLINK_DPIPE_MATCH_TYPE_FIELD_EXACT;
match.header = &mlxsw_sp_dpipe_header_metadata;
match.field_id = MLXSW_SP_DPIPE_FIELD_METADATA_ADJ_SIZE;
err = devlink_dpipe_match_put(skb, &match);
if (err)
return err;
@ -897,6 +911,7 @@ static u64 mlxsw_sp_dpipe_table_adj_size(struct mlxsw_sp *mlxsw_sp)
enum mlxsw_sp_dpipe_table_adj_match {
MLXSW_SP_DPIPE_TABLE_ADJ_MATCH_INDEX,
MLXSW_SP_DPIPE_TABLE_ADJ_MATCH_SIZE,
MLXSW_SP_DPIPE_TABLE_ADJ_MATCH_HASH_INDEX,
MLXSW_SP_DPIPE_TABLE_ADJ_MATCH_COUNT,
};
@ -919,6 +934,11 @@ mlxsw_sp_dpipe_table_adj_match_action_prepare(struct devlink_dpipe_match *matche
match->header = &mlxsw_sp_dpipe_header_metadata;
match->field_id = MLXSW_SP_DPIPE_FIELD_METADATA_ADJ_INDEX;
match = &matches[MLXSW_SP_DPIPE_TABLE_ADJ_MATCH_SIZE];
match->type = DEVLINK_DPIPE_MATCH_TYPE_FIELD_EXACT;
match->header = &mlxsw_sp_dpipe_header_metadata;
match->field_id = MLXSW_SP_DPIPE_FIELD_METADATA_ADJ_SIZE;
match = &matches[MLXSW_SP_DPIPE_TABLE_ADJ_MATCH_HASH_INDEX];
match->type = DEVLINK_DPIPE_MATCH_TYPE_FIELD_EXACT;
match->header = &mlxsw_sp_dpipe_header_metadata;
@ -955,6 +975,15 @@ mlxsw_sp_dpipe_table_adj_entry_prepare(struct devlink_dpipe_entry *entry,
match = &matches[MLXSW_SP_DPIPE_TABLE_ADJ_MATCH_INDEX];
match_value = &match_values[MLXSW_SP_DPIPE_TABLE_ADJ_MATCH_INDEX];
match_value->match = match;
match_value->value_size = sizeof(u32);
match_value->value = kmalloc(match_value->value_size, GFP_KERNEL);
if (!match_value->value)
return -ENOMEM;
match = &matches[MLXSW_SP_DPIPE_TABLE_ADJ_MATCH_SIZE];
match_value = &match_values[MLXSW_SP_DPIPE_TABLE_ADJ_MATCH_SIZE];
match_value->match = match;
match_value->value_size = sizeof(u32);
match_value->value = kmalloc(match_value->value_size, GFP_KERNEL);
@ -993,8 +1022,8 @@ mlxsw_sp_dpipe_table_adj_entry_prepare(struct devlink_dpipe_entry *entry,
static void
__mlxsw_sp_dpipe_table_adj_entry_fill(struct devlink_dpipe_entry *entry,
u32 adj_index, u32 adj_hash_index,
unsigned char *ha,
u32 adj_index, u32 adj_size,
u32 adj_hash_index, unsigned char *ha,
struct mlxsw_sp_rif *rif)
{
struct devlink_dpipe_value *value;
@ -1005,6 +1034,10 @@ __mlxsw_sp_dpipe_table_adj_entry_fill(struct devlink_dpipe_entry *entry,
p_index = value->value;
*p_index = adj_index;
value = &entry->match_values[MLXSW_SP_DPIPE_TABLE_ADJ_MATCH_SIZE];
p_index = value->value;
*p_index = adj_size;
value = &entry->match_values[MLXSW_SP_DPIPE_TABLE_ADJ_MATCH_HASH_INDEX];
p_index = value->value;
*p_index = adj_hash_index;
@ -1027,10 +1060,11 @@ static void mlxsw_sp_dpipe_table_adj_entry_fill(struct mlxsw_sp *mlxsw_sp,
unsigned char *ha = mlxsw_sp_nexthop_ha(nh);
u32 adj_hash_index = 0;
u32 adj_index = 0;
u32 adj_size = 0;
int err;
mlxsw_sp_nexthop_indexes(nh, &adj_index, &adj_hash_index);
__mlxsw_sp_dpipe_table_adj_entry_fill(entry, adj_index,
mlxsw_sp_nexthop_indexes(nh, &adj_index, &adj_size, &adj_hash_index);
__mlxsw_sp_dpipe_table_adj_entry_fill(entry, adj_index, adj_size,
adj_hash_index, ha, rif);
err = mlxsw_sp_nexthop_counter_get(mlxsw_sp, nh, &entry->counter);
if (!err)
@ -1138,13 +1172,15 @@ static int mlxsw_sp_dpipe_table_adj_counters_update(void *priv, bool enable)
struct mlxsw_sp_nexthop *nh;
u32 adj_hash_index = 0;
u32 adj_index = 0;
u32 adj_size = 0;
mlxsw_sp_nexthop_for_each(nh, mlxsw_sp->router) {
if (!mlxsw_sp_nexthop_offload(nh) ||
mlxsw_sp_nexthop_group_has_ipip(nh))
continue;
mlxsw_sp_nexthop_indexes(nh, &adj_index, &adj_hash_index);
mlxsw_sp_nexthop_indexes(nh, &adj_index, &adj_size,
&adj_hash_index);
if (enable)
mlxsw_sp_nexthop_counter_alloc(mlxsw_sp, nh);
else

3
drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
View File

@ -2299,7 +2299,7 @@ unsigned char *mlxsw_sp_nexthop_ha(struct mlxsw_sp_nexthop *nh)
}
int mlxsw_sp_nexthop_indexes(struct mlxsw_sp_nexthop *nh, u32 *p_adj_index,
u32 *p_adj_hash_index)
u32 *p_adj_size, u32 *p_adj_hash_index)
{
struct mlxsw_sp_nexthop_group *nh_grp = nh->nh_grp;
u32 adj_hash_index = 0;
@ -2309,6 +2309,7 @@ int mlxsw_sp_nexthop_indexes(struct mlxsw_sp_nexthop *nh, u32 *p_adj_index,
return -EINVAL;
*p_adj_index = nh_grp->adj_index;
*p_adj_size = nh_grp->ecmp_size;
for (i = 0; i < nh_grp->count; i++) {
struct mlxsw_sp_nexthop *nh_iter = &nh_grp->nexthops[i];

2
drivers/net/ethernet/mellanox/mlxsw/spectrum_router.h
View File

@ -115,7 +115,7 @@ struct mlxsw_sp_nexthop *mlxsw_sp_nexthop_next(struct mlxsw_sp_router *router,
bool mlxsw_sp_nexthop_offload(struct mlxsw_sp_nexthop *nh);
unsigned char *mlxsw_sp_nexthop_ha(struct mlxsw_sp_nexthop *nh);
int mlxsw_sp_nexthop_indexes(struct mlxsw_sp_nexthop *nh, u32 *p_adj_index,
u32 *p_adj_hash_index);
u32 *p_adj_size, u32 *p_adj_hash_index);
struct mlxsw_sp_rif *mlxsw_sp_nexthop_rif(struct mlxsw_sp_nexthop *nh);
bool mlxsw_sp_nexthop_group_has_ipip(struct mlxsw_sp_nexthop *nh);
#define mlxsw_sp_nexthop_for_each(nh, router) \