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net/mlx5: Add support for multiple RoCE enable

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Previously, only mlx5_ib enabled RoCE on the port, but FPGA needs it as
well.
Add support for counting number of enables, so that FPGA and IB can work
in parallel and independently.
Program the HW to enable RoCE on the first enable call, and program to
disable RoCE on the last disable call.

Signed-off-by: Ilan Tayari <ilant@mellanox.com>
Reviewed-by: Boris Pismenny <borisp@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Ilan Tayari 2017-03-26 17:23:42 +03:00 committed by Saeed Mahameed
parent 52ec462eca
commit a6f7d2aff6
2 changed files with 5 additions and 0 deletions
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4
drivers/net/ethernet/mellanox/mlx5/core/vport.c
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@ -926,12 +926,16 @@ static int mlx5_nic_vport_update_roce_state(struct mlx5_core_dev *mdev,
int mlx5_nic_vport_enable_roce(struct mlx5_core_dev *mdev)
{
if (atomic_inc_return(&mdev->roce.roce_en) != 1)
return 0;
return mlx5_nic_vport_update_roce_state(mdev, MLX5_VPORT_ROCE_ENABLED);
}
EXPORT_SYMBOL_GPL(mlx5_nic_vport_enable_roce);
int mlx5_nic_vport_disable_roce(struct mlx5_core_dev *mdev)
{
if (atomic_dec_return(&mdev->roce.roce_en) != 0)
return 0;
return mlx5_nic_vport_update_roce_state(mdev, MLX5_VPORT_ROCE_DISABLED);
}
EXPORT_SYMBOL_GPL(mlx5_nic_vport_disable_roce);

1
include/linux/mlx5/driver.h
View File

@ -777,6 +777,7 @@ struct mlx5_core_dev {
struct mlx5e_resources mlx5e_res;
struct {
struct mlx5_rsvd_gids reserved_gids;
atomic_t roce_en;
} roce;
#ifdef CONFIG_MLX5_FPGA
struct mlx5_fpga_device *fpga;