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net/mlx4_core: Don't allow to VF change global pause settings

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Currently changing global pause settings is done via SET_PORT
command with input modifier GENERAL. This command is allowed
for each VF since MTU setting is done via the same command.

Change the above to the following scheme: before passing the
request to the FW, the PF will check whether it was issued
by a slave. If yes, don't change global pause and warn,
otherwise change to the requested value and store for
further reference.

Signed-off-by: Eugenia Emantayev <eugenia@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eugenia Emantayev 2016-04-20 16:01:17 +03:00 committed by David S. Miller
parent 4bfd2e6e53
commit 2a500090a4
2 changed files with 15 additions and 0 deletions
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2
drivers/net/ethernet/mellanox/mlx4/mlx4.h
View File

@ -586,6 +586,8 @@ 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];
u8 pptx;
u8 pprx;
int disable_mcast_ref[MLX4_MAX_PORTS + 1];
struct mlx4_resource_tracker res_tracker;
struct workqueue_struct *comm_wq;

13
drivers/net/ethernet/mellanox/mlx4/port.c
View File

@ -1317,6 +1317,19 @@ static int mlx4_common_set_port(struct mlx4_dev *dev, int slave, u32 in_mod,
}
gen_context->mtu = cpu_to_be16(master->max_mtu[port]);
/* Slave cannot change Global Pause configuration */
if (slave != mlx4_master_func_num(dev) &&
((gen_context->pptx != master->pptx) ||
(gen_context->pprx != master->pprx))) {
gen_context->pptx = master->pptx;
gen_context->pprx = master->pprx;
mlx4_warn(dev,
"denying Global Pause change for slave:%d\n",
slave);
} else {
master->pptx = gen_context->pptx;
master->pprx = gen_context->pprx;
}
break;
case MLX4_SET_PORT_GID_TABLE:
/* change to MULTIPLE entries: number of guest's gids