Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 50b4a3c2 authored by Huy Nguyen's avatar Huy Nguyen Committed by Saeed Mahameed
Browse files

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: default avatarHuy Nguyen <huyn@mellanox.com>
Reviewed-by: default avatarParav Pandit <parav@mellanox.com>
Signed-off-by: default avatarSaeed Mahameed <saeedm@mellanox.com>
parent df5f1361

drivers/net/ethernet/mellanox/mlx5/core/en/port.c

+108 −0
Original line number Diff line number Diff line
@@ -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;

}

drivers/net/ethernet/mellanox/mlx5/core/en/port.h

+5 −0
Original line number Diff line number Diff line
@@ -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

include/linux/mlx5/driver.h

+2 −0
Original line number Diff line number Diff line
@@ -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,

include/linux/mlx5/mlx5_ifc.h

+35 −0
Original line number Diff line number Diff line
@@ -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];