net/mlx4_en: Check the enabling mtu flag in SET_PORT wrapper flow
Make sure MTU mask flag is set using new field upon set port
request. In addition, move this code into a helper function for better
code readability.
Signed-off-by: Shaker Daibes <shakerd@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/mellanox/mlx4/port.c b/drivers/net/ethernet/mellanox/mlx4/port.c
index a7b0cdc..57a1057 100644
--- a/drivers/net/ethernet/mellanox/mlx4/port.c
+++ b/drivers/net/ethernet/mellanox/mlx4/port.c
@@ -52,6 +52,7 @@
#define MLX4_FLAG2_V_IGNORE_FCS_MASK BIT(1)
#define MLX4_FLAG2_V_USER_MTU_MASK BIT(5)
+#define MLX4_FLAG_V_MTU_MASK BIT(0)
#define MLX4_IGNORE_FCS_MASK 0x1
#define MLX4_TC_MAX_NUMBER 8
@@ -1241,6 +1242,38 @@ void mlx4_reset_roce_gids(struct mlx4_dev *dev, int slave)
}
static void
+mlx4_en_set_port_mtu(struct mlx4_dev *dev, int slave, int port,
+ struct mlx4_set_port_general_context *gen_context)
+{
+ struct mlx4_priv *priv = mlx4_priv(dev);
+ struct mlx4_mfunc_master_ctx *master = &priv->mfunc.master;
+ struct mlx4_slave_state *slave_st = &master->slave_state[slave];
+ u16 mtu, prev_mtu;
+
+ /* Mtu is configured as the max USER_MTU among all
+ * the functions on the port.
+ */
+ mtu = be16_to_cpu(gen_context->mtu);
+ mtu = min_t(int, mtu, dev->caps.eth_mtu_cap[port] +
+ ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN);
+ prev_mtu = slave_st->mtu[port];
+ slave_st->mtu[port] = mtu;
+ if (mtu > master->max_mtu[port])
+ master->max_mtu[port] = mtu;
+ if (mtu < prev_mtu && prev_mtu == master->max_mtu[port]) {
+ int i;
+
+ slave_st->mtu[port] = mtu;
+ master->max_mtu[port] = mtu;
+ for (i = 0; i < dev->num_slaves; i++)
+ master->max_mtu[port] =
+ max_t(u16, master->max_mtu[port],
+ master->slave_state[i].mtu[port]);
+ }
+ gen_context->mtu = cpu_to_be16(master->max_mtu[port]);
+}
+
+static void
mlx4_en_set_port_user_mtu(struct mlx4_dev *dev, int slave, int port,
struct mlx4_set_port_general_context *gen_context)
{
@@ -1278,7 +1311,6 @@ static int mlx4_common_set_port(struct mlx4_dev *dev, int slave, u32 in_mod,
struct mlx4_priv *priv = mlx4_priv(dev);
struct mlx4_port_info *port_info;
struct mlx4_mfunc_master_ctx *master = &priv->mfunc.master;
- struct mlx4_slave_state *slave_st = &master->slave_state[slave];
struct mlx4_set_port_rqp_calc_context *qpn_context;
struct mlx4_set_port_general_context *gen_context;
struct mlx4_roce_gid_entry *gid_entry_tbl, *gid_entry_mbox, *gid_entry_mb1;
@@ -1289,7 +1321,6 @@ static int mlx4_common_set_port(struct mlx4_dev *dev, int slave, u32 in_mod,
int base;
u32 in_modifier;
u32 promisc;
- u16 mtu, prev_mtu;
int err;
int i, j;
int offset;
@@ -1332,26 +1363,10 @@ static int mlx4_common_set_port(struct mlx4_dev *dev, int slave, u32 in_mod,
break;
case MLX4_SET_PORT_GENERAL:
gen_context = inbox->buf;
- /* Mtu is configured as the max MTU among all the
- * the functions on the port. */
- mtu = be16_to_cpu(gen_context->mtu);
- mtu = min_t(int, mtu, dev->caps.eth_mtu_cap[port] +
- ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN);
- prev_mtu = slave_st->mtu[port];
- slave_st->mtu[port] = mtu;
- if (mtu > master->max_mtu[port])
- master->max_mtu[port] = mtu;
- if (mtu < prev_mtu && prev_mtu ==
- master->max_mtu[port]) {
- slave_st->mtu[port] = mtu;
- master->max_mtu[port] = mtu;
- for (i = 0; i < dev->num_slaves; i++) {
- master->max_mtu[port] =
- max(master->max_mtu[port],
- master->slave_state[i].mtu[port]);
- }
- }
- gen_context->mtu = cpu_to_be16(master->max_mtu[port]);
+
+ if (gen_context->flags & MLX4_FLAG_V_MTU_MASK)
+ mlx4_en_set_port_mtu(dev, slave, port,
+ gen_context);
if (gen_context->flags2 & MLX4_FLAG2_V_USER_MTU_MASK)
mlx4_en_set_port_user_mtu(dev, slave, port,