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mlxsw: spectrum: Allow fetch-and-clear of flow counters

Browse source 
For the report_delta-like interface like a previous patch has added for
collection of NH group statistics, it's easiest to read the counter and
have the HW clear it right away. Thus, change mlxsw_sp_flow_counter_get()
to take a bool indicating whether this should be done.

Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Link: https://lore.kernel.org/r/6a096ede8ee92d5041e3832242c3bbc137198aba.1709901020.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Petr Machata 2024-03-08 13:59:49 +01:00 committed by Jakub Kicinski
parent 8acb480e43
commit 6fb88aaf27
5 changed files with 11 additions and 9 deletions
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8
drivers/net/ethernet/mellanox/mlxsw/spectrum.c
View file

@ -176,13 +176,15 @@ MLXSW_ITEM32(tx, hdr, fid, 0x08, 16, 16);
MLXSW_ITEM32(tx, hdr, type, 0x0C, 0, 4);
int mlxsw_sp_flow_counter_get(struct mlxsw_sp *mlxsw_sp,
unsigned int counter_index, u64 *packets,
u64 *bytes)
unsigned int counter_index, bool clear,
u64 *packets, u64 *bytes)
{
enum mlxsw_reg_mgpc_opcode op = clear ? MLXSW_REG_MGPC_OPCODE_CLEAR :
MLXSW_REG_MGPC_OPCODE_NOP;
char mgpc_pl[MLXSW_REG_MGPC_LEN];
int err;
mlxsw_reg_mgpc_pack(mgpc_pl, counter_index, MLXSW_REG_MGPC_OPCODE_NOP,
mlxsw_reg_mgpc_pack(mgpc_pl, counter_index, op,
MLXSW_REG_FLOW_COUNTER_SET_TYPE_PACKETS_BYTES);
err = mlxsw_reg_query(mlxsw_sp->core, MLXSW_REG(mgpc), mgpc_pl);
if (err)

4
drivers/net/ethernet/mellanox/mlxsw/spectrum.h
View file

@ -706,8 +706,8 @@ int mlxsw_sp_port_kill_vid(struct net_device *dev,
int mlxsw_sp_port_vlan_set(struct mlxsw_sp_port *mlxsw_sp_port, u16 vid_begin,
u16 vid_end, bool is_member, bool untagged);
int mlxsw_sp_flow_counter_get(struct mlxsw_sp *mlxsw_sp,
unsigned int counter_index, u64 *packets,
u64 *bytes);
unsigned int counter_index, bool clear,
u64 *packets, u64 *bytes);
int mlxsw_sp_flow_counter_alloc(struct mlxsw_sp *mlxsw_sp,
unsigned int *p_counter_index);
void mlxsw_sp_flow_counter_free(struct mlxsw_sp *mlxsw_sp,

2
drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c
View file

@ -1024,7 +1024,7 @@ int mlxsw_sp_acl_rule_get_stats(struct mlxsw_sp *mlxsw_sp,
rulei = mlxsw_sp_acl_rule_rulei(rule);
if (rulei->counter_valid) {
err = mlxsw_sp_flow_counter_get(mlxsw_sp, rulei->counter_index,
&current_packets,
false, &current_packets,
&current_bytes);
if (err)
return err;

2
drivers/net/ethernet/mellanox/mlxsw/spectrum_mr_tcam.c
View file

@ -361,7 +361,7 @@ static int mlxsw_sp_mr_tcam_route_stats(struct mlxsw_sp *mlxsw_sp,
struct mlxsw_sp_mr_tcam_route *route = route_priv;
return mlxsw_sp_flow_counter_get(mlxsw_sp, route->counter_index,
packets, bytes);
false, packets, bytes);
}
static int

4
drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
View file

@ -2251,7 +2251,7 @@ int mlxsw_sp_neigh_counter_get(struct mlxsw_sp *mlxsw_sp,
return -EINVAL;
return mlxsw_sp_flow_counter_get(mlxsw_sp, neigh_entry->counter_index,
p_counter, NULL);
false, p_counter, NULL);
}
static struct mlxsw_sp_neigh_entry *
@ -3186,7 +3186,7 @@ int mlxsw_sp_nexthop_counter_get(struct mlxsw_sp *mlxsw_sp,
return -EINVAL;
return mlxsw_sp_flow_counter_get(mlxsw_sp, nh->counter_index,
p_counter, NULL);
false, p_counter, NULL);
}
struct mlxsw_sp_nexthop *mlxsw_sp_nexthop_next(struct mlxsw_sp_router *router,