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net/mlx4_en: Pass user MTU value to Firmware at set port command

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When starting the port, driver will inform Firmware about the actual MTU
which does not include implicit headers, such as FCS or VLAN tags.

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>
This commit is contained in:
Shaker Daibes 2017-01-29 18:56:18 +02:00 committed by David S. Miller
parent 297e1cf29e
commit 40fb4fc1e1
5 changed files with 82 additions and 7 deletions
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8
drivers/net/ethernet/mellanox/mlx4/en_netdev.c
View File

@ -1695,6 +1695,14 @@ int mlx4_en_start_port(struct net_device *dev)
priv->port, err);
goto tx_err;
}
err = mlx4_SET_PORT_user_mtu(mdev->dev, priv->port, dev->mtu);
if (err) {
en_err(priv, "Failed to pass user MTU(%d) to Firmware for port %d, with error %d\n",
dev->mtu, priv->port, err);
goto tx_err;
}
/* Set default qp number */
err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port, priv->base_qpn, 0);
if (err) {

2
drivers/net/ethernet/mellanox/mlx4/fw.c
View File

@ -2983,7 +2983,7 @@ static int mlx4_SET_PORT_phv_bit(struct mlx4_dev *dev, u8 port, u8 phv_bit)
return PTR_ERR(mailbox);
context = mailbox->buf;
context->v_ignore_fcs |= SET_PORT_GEN_PHV_VALID;
context->flags2 |= SET_PORT_GEN_PHV_VALID;
if (phv_bit)
context->phv_en |= SET_PORT_GEN_PHV_EN;

7
drivers/net/ethernet/mellanox/mlx4/mlx4.h
View File

@ -487,6 +487,7 @@ struct mlx4_slave_state {
bool vst_qinq_supported;
u8 function;
dma_addr_t vhcr_dma;
u16 user_mtu[MLX4_MAX_PORTS + 1];
u16 mtu[MLX4_MAX_PORTS + 1];
__be32 ib_cap_mask[MLX4_MAX_PORTS + 1];
struct mlx4_slave_eqe eq[MLX4_MFUNC_MAX_EQES];
@ -590,6 +591,7 @@ struct mlx4_mfunc_master_ctx {
struct mlx4_master_qp0_state qp0_state[MLX4_MAX_PORTS + 1];
int init_port_ref[MLX4_MAX_PORTS + 1];
u16 max_mtu[MLX4_MAX_PORTS + 1];
u16 max_user_mtu[MLX4_MAX_PORTS + 1];
u8 pptx;
u8 pprx;
int disable_mcast_ref[MLX4_MAX_PORTS + 1];
@ -787,7 +789,7 @@ enum {
struct mlx4_set_port_general_context {
u16 reserved1;
u8 v_ignore_fcs;
u8 flags2;
u8 flags;
union {
u8 ignore_fcs;
@ -803,7 +805,8 @@ struct mlx4_set_port_general_context {
u16 reserved4;
u32 reserved5;
u8 phv_en;
u8 reserved6[3];
u8 reserved6[5];
__be16 user_mtu;
};
struct mlx4_set_port_rqp_calc_context {

71
drivers/net/ethernet/mellanox/mlx4/port.c
View File

@ -50,7 +50,8 @@
#define MLX4_STATS_ERROR_COUNTERS_MASK 0x1ffc30ULL
#define MLX4_STATS_PORT_COUNTERS_MASK 0x1fe00000ULL
#define MLX4_FLAG_V_IGNORE_FCS_MASK 0x2
#define MLX4_FLAG2_V_IGNORE_FCS_MASK BIT(1)
#define MLX4_FLAG2_V_USER_MTU_MASK BIT(5)
#define MLX4_IGNORE_FCS_MASK 0x1
#define MLX4_TC_MAX_NUMBER 8
@ -1239,6 +1240,38 @@ void mlx4_reset_roce_gids(struct mlx4_dev *dev, int slave)
return;
}
static void
mlx4_en_set_port_user_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 user_mtu, prev_user_mtu;
/* User Mtu is configured as the max USER_MTU among all
* the functions on the port.
*/
user_mtu = be16_to_cpu(gen_context->user_mtu);
user_mtu = min_t(int, user_mtu, dev->caps.eth_mtu_cap[port]);
prev_user_mtu = slave_st->user_mtu[port];
slave_st->user_mtu[port] = user_mtu;
if (user_mtu > master->max_user_mtu[port])
master->max_user_mtu[port] = user_mtu;
if (user_mtu < prev_user_mtu &&
prev_user_mtu == master->max_user_mtu[port]) {
int i;
slave_st->user_mtu[port] = user_mtu;
master->max_user_mtu[port] = user_mtu;
for (i = 0; i < dev->num_slaves; i++)
master->max_user_mtu[port] =
max_t(u16, master->max_user_mtu[port],
master->slave_state[i].user_mtu[port]);
}
gen_context->user_mtu = cpu_to_be16(master->max_user_mtu[port]);
}
static int mlx4_common_set_port(struct mlx4_dev *dev, int slave, u32 in_mod,
u8 op_mod, struct mlx4_cmd_mailbox *inbox)
{
@ -1269,7 +1302,9 @@ static int mlx4_common_set_port(struct mlx4_dev *dev, int slave, u32 in_mod,
is_eth = op_mod;
port_info = &priv->port[port];
/* Slaves cannot perform SET_PORT operations except changing MTU */
/* Slaves cannot perform SET_PORT operations,
* except for changing MTU and USER_MTU.
*/
if (is_eth) {
if (slave != dev->caps.function &&
in_modifier != MLX4_SET_PORT_GENERAL &&
@ -1316,8 +1351,12 @@ static int mlx4_common_set_port(struct mlx4_dev *dev, int slave, u32 in_mod,
master->slave_state[i].mtu[port]);
}
}
gen_context->mtu = cpu_to_be16(master->max_mtu[port]);
if (gen_context->flags2 & MLX4_FLAG2_V_USER_MTU_MASK)
mlx4_en_set_port_user_mtu(dev, slave, port,
gen_context);
/* Slave cannot change Global Pause configuration */
if (slave != mlx4_master_func_num(dev) &&
((gen_context->pptx != master->pptx) ||
@ -1608,6 +1647,30 @@ int mlx4_SET_PORT_qpn_calc(struct mlx4_dev *dev, u8 port, u32 base_qpn,
}
EXPORT_SYMBOL(mlx4_SET_PORT_qpn_calc);
int mlx4_SET_PORT_user_mtu(struct mlx4_dev *dev, u8 port, u16 user_mtu)
{
struct mlx4_cmd_mailbox *mailbox;
struct mlx4_set_port_general_context *context;
u32 in_mod;
int err;
mailbox = mlx4_alloc_cmd_mailbox(dev);
if (IS_ERR(mailbox))
return PTR_ERR(mailbox);
context = mailbox->buf;
context->flags2 |= MLX4_FLAG2_V_USER_MTU_MASK;
context->user_mtu = cpu_to_be16(user_mtu);
in_mod = MLX4_SET_PORT_GENERAL << 8 | port;
err = mlx4_cmd(dev, mailbox->dma, in_mod, MLX4_SET_PORT_ETH_OPCODE,
MLX4_CMD_SET_PORT, MLX4_CMD_TIME_CLASS_B,
MLX4_CMD_WRAPPED);
mlx4_free_cmd_mailbox(dev, mailbox);
return err;
}
EXPORT_SYMBOL(mlx4_SET_PORT_user_mtu);
int mlx4_SET_PORT_fcs_check(struct mlx4_dev *dev, u8 port, u8 ignore_fcs_value)
{
struct mlx4_cmd_mailbox *mailbox;
@ -1619,7 +1682,7 @@ int mlx4_SET_PORT_fcs_check(struct mlx4_dev *dev, u8 port, u8 ignore_fcs_value)
if (IS_ERR(mailbox))
return PTR_ERR(mailbox);
context = mailbox->buf;
context->v_ignore_fcs |= MLX4_FLAG_V_IGNORE_FCS_MASK;
context->flags2 |= MLX4_FLAG2_V_IGNORE_FCS_MASK;
if (ignore_fcs_value)
context->ignore_fcs |= MLX4_IGNORE_FCS_MASK;
else

1
include/linux/mlx4/device.h
View File

@ -1374,6 +1374,7 @@ int mlx4_get_base_qpn(struct mlx4_dev *dev, u8 port);
int __mlx4_replace_mac(struct mlx4_dev *dev, u8 port, int qpn, u64 new_mac);
int mlx4_SET_PORT_general(struct mlx4_dev *dev, u8 port, int mtu,
u8 pptx, u8 pfctx, u8 pprx, u8 pfcrx);
int mlx4_SET_PORT_user_mtu(struct mlx4_dev *dev, u8 port, u16 user_mtu);
int mlx4_SET_PORT_qpn_calc(struct mlx4_dev *dev, u8 port, u32 base_qpn,
u8 promisc);
int mlx4_SET_PORT_BEACON(struct mlx4_dev *dev, u8 port, u16 time);