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net/mlx4_core: Prevent VF from changing port configuration

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Added wrapper to the ACCESS_REG command for handling guest HW
registers access, preventing write operations, but do allow reads.

This will prevent SRIOV guests to change port PTYS configuration,
such as speed/advertised link modes.

Fixes: adbc7ac5c1 ('net/mlx4_core: Introduce ACCESS_REG CMD [...]')
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Saeed Mahameed 2014-11-02 16:26:13 +02:00 committed by David S. Miller
parent d75b1ade56
commit 6e80669998
3 changed files with 35 additions and 2 deletions
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2
drivers/net/ethernet/mellanox/mlx4/cmd.c
View File

@ -1345,7 +1345,7 @@ static struct mlx4_cmd_info cmd_info[] = {
.out_is_imm = false,
.encode_slave_id = false,
.verify = NULL,
.wrapper = NULL,
.wrapper = mlx4_ACCESS_REG_wrapper,
},
/* Native multicast commands are not available for guests */
{

30
drivers/net/ethernet/mellanox/mlx4/fw.c
View File

@ -2220,7 +2220,7 @@ static int mlx4_ACCESS_REG(struct mlx4_dev *dev, u16 reg_id,
memcpy(inbuf->reg_data, reg_data, reg_len);
err = mlx4_cmd_box(dev, inbox->dma, outbox->dma, 0, 0,
MLX4_CMD_ACCESS_REG, MLX4_CMD_TIME_CLASS_C,
MLX4_CMD_NATIVE);
MLX4_CMD_WRAPPED);
if (err)
goto out;
@ -2263,3 +2263,31 @@ int mlx4_ACCESS_PTYS_REG(struct mlx4_dev *dev,
method, sizeof(*ptys_reg), ptys_reg);
}
EXPORT_SYMBOL_GPL(mlx4_ACCESS_PTYS_REG);
int mlx4_ACCESS_REG_wrapper(struct mlx4_dev *dev, int slave,
struct mlx4_vhcr *vhcr,
struct mlx4_cmd_mailbox *inbox,
struct mlx4_cmd_mailbox *outbox,
struct mlx4_cmd_info *cmd)
{
struct mlx4_access_reg *inbuf = inbox->buf;
u8 method = inbuf->method & MLX4_ACCESS_REG_METHOD_MASK;
u16 reg_id = be16_to_cpu(inbuf->reg_id);
if (slave != mlx4_master_func_num(dev) &&
method == MLX4_ACCESS_REG_WRITE)
return -EPERM;
if (reg_id == MLX4_REG_ID_PTYS) {
struct mlx4_ptys_reg *ptys_reg =
(struct mlx4_ptys_reg *)inbuf->reg_data;
ptys_reg->local_port =
mlx4_slave_convert_port(dev, slave,
ptys_reg->local_port);
}
return mlx4_cmd_box(dev, inbox->dma, outbox->dma, vhcr->in_modifier,
0, MLX4_CMD_ACCESS_REG, MLX4_CMD_TIME_CLASS_C,
MLX4_CMD_NATIVE);
}

5
drivers/net/ethernet/mellanox/mlx4/mlx4.h
View File

@ -1273,6 +1273,11 @@ int mlx4_QP_FLOW_STEERING_DETACH_wrapper(struct mlx4_dev *dev, int slave,
struct mlx4_cmd_mailbox *inbox,
struct mlx4_cmd_mailbox *outbox,
struct mlx4_cmd_info *cmd);
int mlx4_ACCESS_REG_wrapper(struct mlx4_dev *dev, int slave,
struct mlx4_vhcr *vhcr,
struct mlx4_cmd_mailbox *inbox,
struct mlx4_cmd_mailbox *outbox,
struct mlx4_cmd_info *cmd);
int mlx4_get_mgm_entry_size(struct mlx4_dev *dev);
int mlx4_get_qp_per_mgm(struct mlx4_dev *dev);