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net/mlx5: PPTB and PBMC register firmware command support 

Add firmware command interface to read and write PPTB and PBMC
registers.

PPTB register enables mappings priority to a specific receive buffer.

PBMC registers enables changing the receive buffer's configuration such
as buffer size, xon/xoff thresholds, buffer's lossy property and
buffer's shared property.

Signed-off-by: Huy Nguyen <huyn@mellanox.com>
Reviewed-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Huy Nguyen 2018-03-02 15:47:01 -06:00 committed by Saeed Mahameed
parent df5f1361cc
commit 50b4a3c236
4 changed files with 150 additions and 0 deletions
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108
drivers/net/ethernet/mellanox/mlx5/core/en/port.c
View File

@ -127,3 +127,111 @@ u32 mlx5e_port_speed2linkmodes(u32 speed)
return link_modes;
}
int mlx5e_port_query_pbmc(struct mlx5_core_dev *mdev, void *out)
{
int sz = MLX5_ST_SZ_BYTES(pbmc_reg);
void *in;
int err;
in = kzalloc(sz, GFP_KERNEL);
if (!in)
return -ENOMEM;
MLX5_SET(pbmc_reg, in, local_port, 1);
err = mlx5_core_access_reg(mdev, in, sz, out, sz, MLX5_REG_PBMC, 0, 0);
kfree(in);
return err;
}
int mlx5e_port_set_pbmc(struct mlx5_core_dev *mdev, void *in)
{
int sz = MLX5_ST_SZ_BYTES(pbmc_reg);
void *out;
int err;
out = kzalloc(sz, GFP_KERNEL);
if (!out)
return -ENOMEM;
MLX5_SET(pbmc_reg, in, local_port, 1);
err = mlx5_core_access_reg(mdev, in, sz, out, sz, MLX5_REG_PBMC, 0, 1);
kfree(out);
return err;
}
/* buffer[i]: buffer that priority i mapped to */
int mlx5e_port_query_priority2buffer(struct mlx5_core_dev *mdev, u8 *buffer)
{
int sz = MLX5_ST_SZ_BYTES(pptb_reg);
u32 prio_x_buff;
void *out;
void *in;
int prio;
int err;
in = kzalloc(sz, GFP_KERNEL);
out = kzalloc(sz, GFP_KERNEL);
if (!in || !out) {
err = -ENOMEM;
goto out;
}
MLX5_SET(pptb_reg, in, local_port, 1);
err = mlx5_core_access_reg(mdev, in, sz, out, sz, MLX5_REG_PPTB, 0, 0);
if (err)
goto out;
prio_x_buff = MLX5_GET(pptb_reg, out, prio_x_buff);
for (prio = 0; prio < 8; prio++) {
buffer[prio] = (u8)(prio_x_buff >> (4 * prio)) & 0xF;
mlx5_core_dbg(mdev, "prio %d, buffer %d\n", prio, buffer[prio]);
}
out:
kfree(in);
kfree(out);
return err;
}
int mlx5e_port_set_priority2buffer(struct mlx5_core_dev *mdev, u8 *buffer)
{
int sz = MLX5_ST_SZ_BYTES(pptb_reg);
u32 prio_x_buff;
void *out;
void *in;
int prio;
int err;
in = kzalloc(sz, GFP_KERNEL);
out = kzalloc(sz, GFP_KERNEL);
if (!in || !out) {
err = -ENOMEM;
goto out;
}
/* First query the pptb register */
MLX5_SET(pptb_reg, in, local_port, 1);
err = mlx5_core_access_reg(mdev, in, sz, out, sz, MLX5_REG_PPTB, 0, 0);
if (err)
goto out;
memcpy(in, out, sz);
MLX5_SET(pptb_reg, in, local_port, 1);
/* Update the pm and prio_x_buff */
MLX5_SET(pptb_reg, in, pm, 0xFF);
prio_x_buff = 0;
for (prio = 0; prio < 8; prio++)
prio_x_buff |= (buffer[prio] << (4 * prio));
MLX5_SET(pptb_reg, in, prio_x_buff, prio_x_buff);
err = mlx5_core_access_reg(mdev, in, sz, out, sz, MLX5_REG_PPTB, 0, 1);
out:
kfree(in);
kfree(out);
return err;
}

5
drivers/net/ethernet/mellanox/mlx5/core/en/port.h
View File

@ -40,4 +40,9 @@ u32 mlx5e_port_ptys2speed(u32 eth_proto_oper);
int mlx5e_port_linkspeed(struct mlx5_core_dev *mdev, u32 *speed);
int mlx5e_port_max_linkspeed(struct mlx5_core_dev *mdev, u32 *speed);
u32 mlx5e_port_speed2linkmodes(u32 speed);
int mlx5e_port_query_pbmc(struct mlx5_core_dev *mdev, void *out);
int mlx5e_port_set_pbmc(struct mlx5_core_dev *mdev, void *in);
int mlx5e_port_query_priority2buffer(struct mlx5_core_dev *mdev, u8 *buffer);
int mlx5e_port_set_priority2buffer(struct mlx5_core_dev *mdev, u8 *buffer);
#endif

2
include/linux/mlx5/driver.h
View File

@ -124,6 +124,8 @@ enum {
MLX5_REG_PAOS = 0x5006,
MLX5_REG_PFCC = 0x5007,
MLX5_REG_PPCNT = 0x5008,
MLX5_REG_PPTB = 0x500b,
MLX5_REG_PBMC = 0x500c,
MLX5_REG_PMAOS = 0x5012,
MLX5_REG_PUDE = 0x5009,
MLX5_REG_PMPE = 0x5010,

35
include/linux/mlx5/mlx5_ifc.h
View File

@ -8788,6 +8788,41 @@ struct mlx5_ifc_qpts_reg_bits {
u8 trust_state[0x3];
};
struct mlx5_ifc_pptb_reg_bits {
u8 reserved_at_0[0x2];
u8 mm[0x2];
u8 reserved_at_4[0x4];
u8 local_port[0x8];
u8 reserved_at_10[0x6];
u8 cm[0x1];
u8 um[0x1];
u8 pm[0x8];
u8 prio_x_buff[0x20];
u8 pm_msb[0x8];
u8 reserved_at_48[0x10];
u8 ctrl_buff[0x4];
u8 untagged_buff[0x4];
};
struct mlx5_ifc_pbmc_reg_bits {
u8 reserved_at_0[0x8];
u8 local_port[0x8];
u8 reserved_at_10[0x10];
u8 xoff_timer_value[0x10];
u8 xoff_refresh[0x10];
u8 reserved_at_40[0x9];
u8 fullness_threshold[0x7];
u8 port_buffer_size[0x10];
struct mlx5_ifc_bufferx_reg_bits buffer[10];
u8 reserved_at_2e0[0x40];
};
struct mlx5_ifc_qtct_reg_bits {
u8 reserved_at_0[0x8];
u8 port_number[0x8];