mlxsw: spectrum_buffers: Keep mlxsw_sp_sb_prs in mlxsw_sp_sb_vals

The SBPR register configures shared buffer pools. The default
configuration depends on the chip type. Therefore keep it in struct
mlxsw_sp_sb_vals. Redirect the one reference from the global array to
the field.

Because the pool descriptor ID is implicit in the ordering of array
members, both this array and the pool descriptor array have the same
length. Therefore reuse mlxsw_sp_sb.pool_dess_len for the purpose of
determining the length of SBPR array.

Drop the now useless MLXSW_SP_SB_PRS_LEN.
Signed-off-by: NPetr Machata <petrm@mellanox.com>
Signed-off-by: NIdo Schimmel <idosch@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c

@@ -75,6 +75,7 @@ struct mlxsw_sp_sb_vals {
 	unsigned int pool_count;
 	const struct mlxsw_sp_sb_pool_des *pool_dess;
 	const struct mlxsw_sp_sb_pm *pms;
+	const struct mlxsw_sp_sb_pr *prs;
 };
 
 u32 mlxsw_sp_cells_bytes(const struct mlxsw_sp *mlxsw_sp, u32 cells)
@@ -377,8 +378,6 @@ static const struct mlxsw_sp_sb_pr mlxsw_sp_sb_prs[] = {
 	MLXSW_SP_SB_PR(MLXSW_REG_SBPR_MODE_STATIC, MLXSW_SP_SB_INFI),
 };
 
-#define MLXSW_SP_SB_PRS_LEN ARRAY_SIZE(mlxsw_sp_sb_prs)
-
 static int mlxsw_sp_sb_prs_init(struct mlxsw_sp *mlxsw_sp,
 				const struct mlxsw_sp_sb_pr *prs,
 				size_t prs_len)
@@ -684,12 +683,14 @@ const struct mlxsw_sp_sb_vals mlxsw_sp1_sb_vals = {
 	.pool_count = ARRAY_SIZE(mlxsw_sp_sb_pool_dess),
 	.pool_dess = mlxsw_sp_sb_pool_dess,
 	.pms = mlxsw_sp_sb_pms,
+	.prs = mlxsw_sp_sb_prs,
 };
 
 const struct mlxsw_sp_sb_vals mlxsw_sp2_sb_vals = {
 	.pool_count = ARRAY_SIZE(mlxsw_sp_sb_pool_dess),
 	.pool_dess = mlxsw_sp_sb_pool_dess,
 	.pms = mlxsw_sp_sb_pms,
+	.prs = mlxsw_sp_sb_prs,
 };
 
 int mlxsw_sp_buffers_init(struct mlxsw_sp *mlxsw_sp)
@@ -710,12 +711,11 @@ int mlxsw_sp_buffers_init(struct mlxsw_sp *mlxsw_sp)
 	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)
 		goto err_sb_ports_init;
-	err = mlxsw_sp_sb_prs_init(mlxsw_sp, mlxsw_sp_sb_prs,
-				   MLXSW_SP_SB_PRS_LEN);
+	err = mlxsw_sp_sb_prs_init(mlxsw_sp, mlxsw_sp->sb_vals->prs,
+				   mlxsw_sp->sb_vals->pool_count);
 	if (err)
 		goto err_sb_prs_init;
 	err = mlxsw_sp_cpu_port_sb_cms_init(mlxsw_sp);