diff options
| author | Eugenia Emantayev <eugenia@mellanox.com> | 2014-07-08 11:25:19 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-07-08 19:58:44 -0700 |
| commit | 523ece889eeee84a381e16086b81e07a76cff8b6 (patch) | |
| tree | 3bc953a7428c103c4df4e4cb9afbf275abde8e6a /include/linux/mlx4 | |
| parent | 9274f9f895be561274ac13b37494abbc4243aebc (diff) | |
net/mlx4_en: Fix set port ratelimit for 40GE
In 40GE we can't use the default bw units for set ratelimit (100 Mbps)
since the max is 255*100 Mbps = 25 Gbps (not suited for 40GE), thus we need 1 Gbps units.
But for 10GE 1 Gbps units might be too bruit so we use the following solution.
For user set ratelimit <= 25 Gbps:
use 100 Mbps units * user_ratelimit (* 10).
For user set ratelimit > 25 Gbps:
use 1 Gbps units * user_ratelimit.
For user set unlimited ratelimit (0 Gbps):
use 1 Gbps units * MAX_RATELIMIT_DEFAULT (57)
Note: any value > 58 will damage the FW ratelimit computation, so we allow
a max and any higher value will be pulled down to 57.
Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Eugenia Emantayev <eugenia@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/mlx4')
| -rw-r--r-- | include/linux/mlx4/device.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h index b12f4bbd064c..db0aef37645f 100644 --- a/include/linux/mlx4/device.h +++ b/include/linux/mlx4/device.h @@ -48,6 +48,17 @@ #define MSIX_LEGACY_SZ 4 #define MIN_MSIX_P_PORT 5 +#define MLX4_NUM_UP 8 +#define MLX4_NUM_TC 8 +#define MLX4_MAX_100M_UNITS_VAL 255 /* + * work around: can't set values + * greater then this value when + * using 100 Mbps units. + */ +#define MLX4_RATELIMIT_100M_UNITS 3 /* 100 Mbps */ +#define MLX4_RATELIMIT_1G_UNITS 4 /* 1 Gbps */ +#define MLX4_RATELIMIT_DEFAULT 0x00ff + #define MLX4_ROCE_MAX_GIDS 128 #define MLX4_ROCE_PF_GIDS 16 |