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net/mlx5: Hairpin pair core object setup

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Low level code to setup hairpin pair core object, deals with:
 - create hairpin RQs/SQs
 - destroy hairpin RQs/SQs
 - modifying hairpin RQs/SQs - pairing (rst2rdy) and unpairing (rdy2rst)

Unlike conventional RQs/SQs, the memory used for the packet and descriptor
buffers is allocated by the firmware and not the driver. The driver sets
the overall data size (log).

Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Or Gerlitz
2017-11-12 15:15:10 +02:00
committed by Saeed Mahameed
parent 40817cdbb6
commit 18e568c390
2 changed files with 203 additions and 0 deletions
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19
include/linux/mlx5/transobj.h
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@@ -75,4 +75,23 @@ int mlx5_core_modify_rqt(struct mlx5_core_dev *dev, u32 rqtn, u32 *in,
int inlen);
void mlx5_core_destroy_rqt(struct mlx5_core_dev *dev, u32 rqtn);
struct mlx5_hairpin_params {
u8 log_data_size;
u16 q_counter;
};
struct mlx5_hairpin {
struct mlx5_core_dev *func_mdev;
struct mlx5_core_dev *peer_mdev;
u32 rqn;
u32 sqn;
};
struct mlx5_hairpin *
mlx5_core_hairpin_create(struct mlx5_core_dev *func_mdev,
struct mlx5_core_dev *peer_mdev,
struct mlx5_hairpin_params *params);
void mlx5_core_hairpin_destroy(struct mlx5_hairpin *pair);
#endif /* __TRANSOBJ_H__ */