[PATCH net-next 04/13] mlxsw: spectrum_buffers: Keep shared buffer size in mlxsw_sp_sb

[Ido Schimmel]

From: Petr Machata <pe...@mellanox.com>

Entities of infinite size will be reported as if they had the maximum
size allowed by the chip. To that end, keep track of maximum shared
buffer size in mlxsw_sp->sb.

Signed-off-by: Petr Machata <pe...@mellanox.com>
Reviewed-by: Jiri Pirko <j...@mellanox.com>
Signed-off-by: Ido Schimmel <ido...@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c 
b/drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c
index 7f29000c10a1..81f3af6e80af 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c
@@ -68,6 +68,7 @@ struct mlxsw_sp_sb {
        struct mlxsw_sp_sb_pr prs[MLXSW_SP_SB_POOL_DESS_LEN];
        struct mlxsw_sp_sb_port *ports;
        u32 cell_size;
+       u64 sb_size;
 };
 
 u32 mlxsw_sp_cells_bytes(const struct mlxsw_sp *mlxsw_sp, u32 cells)
@@ -585,7 +586,6 @@ int mlxsw_sp_buffers_init(struct mlxsw_sp *mlxsw_sp)
 {
        u16 ing_pool_count;
        u16 eg_pool_count;
-       u64 sb_size;
        int err;
 
        if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, CELL_SIZE))
@@ -593,12 +593,13 @@ int mlxsw_sp_buffers_init(struct mlxsw_sp *mlxsw_sp)
 
        if (!MLXSW_CORE_RES_VALID(mlxsw_sp->core, MAX_BUFFER_SIZE))
                return -EIO;
-       sb_size = MLXSW_CORE_RES_GET(mlxsw_sp->core, MAX_BUFFER_SIZE);
 
        mlxsw_sp->sb = kzalloc(sizeof(*mlxsw_sp->sb), GFP_KERNEL);
        if (!mlxsw_sp->sb)
                return -ENOMEM;
        mlxsw_sp->sb->cell_size = MLXSW_CORE_RES_GET(mlxsw_sp->core, CELL_SIZE);
+       mlxsw_sp->sb->sb_size = MLXSW_CORE_RES_GET(mlxsw_sp->core,
+                                                  MAX_BUFFER_SIZE);
 
        err = mlxsw_sp_sb_ports_init(mlxsw_sp);
        if (err)
@@ -614,7 +615,8 @@ int mlxsw_sp_buffers_init(struct mlxsw_sp *mlxsw_sp)
        if (err)
                goto err_sb_mms_init;
        mlxsw_sp_pool_count(&ing_pool_count, &eg_pool_count);
-       err = devlink_sb_register(priv_to_devlink(mlxsw_sp->core), 0, sb_size,
+       err = devlink_sb_register(priv_to_devlink(mlxsw_sp->core), 0,
+                                 mlxsw_sp->sb->sb_size,
                                  ing_pool_count,
                                  eg_pool_count,
                                  MLXSW_SP_SB_ING_TC_COUNT,
-- 
2.17.1