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authorIdo Schimmel <idosch@mellanox.com>2019-04-22 12:08:43 +0000
committerDavid S. Miller <davem@davemloft.net>2019-04-22 22:09:32 -0700
commit0636f4de791f4e2b1aaab0a92cced4e0c6c191f1 (patch)
treec5ded57e4b2c1912a5ce1fa0fbb6f3cec2364f7b /drivers
parent93d3668c027d8f6dd55d0b904d88675726662d99 (diff)
mlxsw: spectrum_buffers: Add ability to veto pool's configuration
Subsequent patches are going to need to veto changes in certain pools' size and / or threshold type (mode). Add two fields to the pool's struct that indicate if either of these attributes is allowed to change and enforce that. Signed-off-by: Ido Schimmel <idosch@mellanox.com> Acked-by: Jiri Pirko <jiri@mellanox.com> Reviewed-by: Petr Machata <petrm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c17
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c
index 28f44116ad86..f49b8791dcd9 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c
@@ -16,6 +16,8 @@
struct mlxsw_sp_sb_pr {
enum mlxsw_reg_sbpr_mode mode;
u32 size;
+ u8 freeze_mode:1,
+ freeze_size:1;
};
struct mlxsw_cp_sb_occ {
@@ -932,14 +934,27 @@ int mlxsw_sp_sb_pool_set(struct mlxsw_core *mlxsw_core,
{
struct mlxsw_sp *mlxsw_sp = mlxsw_core_driver_priv(mlxsw_core);
u32 pool_size = mlxsw_sp_bytes_cells(mlxsw_sp, size);
+ const struct mlxsw_sp_sb_pr *pr;
enum mlxsw_reg_sbpr_mode mode;
+ mode = (enum mlxsw_reg_sbpr_mode) threshold_type;
+ pr = &mlxsw_sp->sb_vals->prs[pool_index];
+
if (size > MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_BUFFER_SIZE)) {
NL_SET_ERR_MSG_MOD(extack, "Exceeded shared buffer size");
return -EINVAL;
}
- mode = (enum mlxsw_reg_sbpr_mode) threshold_type;
+ if (pr->freeze_mode && pr->mode != mode) {
+ NL_SET_ERR_MSG_MOD(extack, "Changing this pool's threshold type is forbidden");
+ return -EINVAL;
+ };
+
+ if (pr->freeze_size && pr->size != size) {
+ NL_SET_ERR_MSG_MOD(extack, "Changing this pool's size is forbidden");
+ return -EINVAL;
+ };
+
return mlxsw_sp_sb_pr_write(mlxsw_sp, pool_index, mode,
pool_size, false);
}