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IB/mlx4: Add mmap call to map the hardware clock

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In order to read the HCA's cycle counter efficiently in
user space, we need to map the HCA's register.
This is done through mmap call.

Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Matan Barak
2015-06-11 16:35:26 +03:00
committed by Doug Ledford
parent 2528e33e68
commit 52033cfb5a
3 changed files with 45 additions and 1 deletions
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9
include/linux/mlx4/device.h
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@@ -829,6 +829,12 @@ struct mlx4_dev {
struct mlx4_vf_dev *dev_vfs;
};
struct mlx4_clock_params {
u64 offset;
u8 bar;
u8 size;
};
struct mlx4_eqe {
u8 reserved1;
u8 type;
@@ -1485,4 +1491,7 @@ int mlx4_ACCESS_PTYS_REG(struct mlx4_dev *dev,
enum mlx4_access_reg_method method,
struct mlx4_ptys_reg *ptys_reg);
int mlx4_get_internal_clock_params(struct mlx4_dev *dev,
struct mlx4_clock_params *params);
#endif /* MLX4_DEVICE_H */