diff options
| author | Matan Barak <matanb@mellanox.com> | 2015-06-11 16:35:26 +0300 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2015-06-12 14:49:10 -0400 |
| commit | 52033cfb5aab2a54e238e93c9e52f61c2c5708aa (patch) | |
| tree | 2fa1c99afee51a719b168c7b3175cdce25bb4090 /drivers/net/ethernet | |
| parent | 2528e33e680921d95092f83c4a64046744f111b3 (diff) | |
IB/mlx4: Add mmap call to map the hardware clock
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>
Diffstat (limited to 'drivers/net/ethernet')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/main.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c index ced5ecab5aa7..70de39c6a397 100644 --- a/drivers/net/ethernet/mellanox/mlx4/main.c +++ b/drivers/net/ethernet/mellanox/mlx4/main.c @@ -1674,6 +1674,25 @@ static int map_internal_clock(struct mlx4_dev *dev) return 0; } +int mlx4_get_internal_clock_params(struct mlx4_dev *dev, + struct mlx4_clock_params *params) +{ + struct mlx4_priv *priv = mlx4_priv(dev); + + if (mlx4_is_slave(dev)) + return -ENOTSUPP; + + if (!params) + return -EINVAL; + + params->bar = priv->fw.clock_bar; + params->offset = priv->fw.clock_offset; + params->size = MLX4_CLOCK_SIZE; + + return 0; +} +EXPORT_SYMBOL_GPL(mlx4_get_internal_clock_params); + static void unmap_internal_clock(struct mlx4_dev *dev) { struct mlx4_priv *priv = mlx4_priv(dev); |