Commit 39cc792f authored by Maor Gottlieb's avatar Maor Gottlieb Committed by Jason Gunthorpe
Browse files

RDMA/mlx5: Add support to MODIFY_MEMIC command 

Add two functions to allocate and deallocate MEMIC operations
by using the MODIFY_MEMIC command.

Link: https://lore.kernel.org/r/20210411122924.60230-6-leon@kernel.org


Signed-off-by: default avatarMaor Gottlieb <maorg@nvidia.com>
Signed-off-by: default avatarLeon Romanovsky <leonro@nvidia.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@nvidia.com>
parent 251b9d78

drivers/infiniband/hw/mlx5/dm.c

+36 −0
Original line number Diff line number Diff line
@@ -111,6 +111,42 @@ void mlx5_cmd_dealloc_memic(struct mlx5_dm *dm, phys_addr_t addr, 
	spin_unlock(&dm->lock);

}



void mlx5_cmd_dealloc_memic_op(struct mlx5_dm *dm, phys_addr_t addr,

			       u8 operation)

{

	u32 in[MLX5_ST_SZ_DW(modify_memic_in)] = {};

	struct mlx5_core_dev *dev = dm->dev;



	MLX5_SET(modify_memic_in, in, opcode, MLX5_CMD_OP_MODIFY_MEMIC);

	MLX5_SET(modify_memic_in, in, op_mod, MLX5_MODIFY_MEMIC_OP_MOD_DEALLOC);

	MLX5_SET(modify_memic_in, in, memic_operation_type, operation);

	MLX5_SET64(modify_memic_in, in, memic_start_addr, addr - dev->bar_addr);



	mlx5_cmd_exec_in(dev, modify_memic, in);

}



static int mlx5_cmd_alloc_memic_op(struct mlx5_dm *dm, phys_addr_t addr,

				   u8 operation, phys_addr_t *op_addr)

{

	u32 out[MLX5_ST_SZ_DW(modify_memic_out)] = {};

	u32 in[MLX5_ST_SZ_DW(modify_memic_in)] = {};

	struct mlx5_core_dev *dev = dm->dev;

	int err;



	MLX5_SET(modify_memic_in, in, opcode, MLX5_CMD_OP_MODIFY_MEMIC);

	MLX5_SET(modify_memic_in, in, op_mod, MLX5_MODIFY_MEMIC_OP_MOD_ALLOC);

	MLX5_SET(modify_memic_in, in, memic_operation_type, operation);

	MLX5_SET64(modify_memic_in, in, memic_start_addr, addr - dev->bar_addr);



	err = mlx5_cmd_exec_inout(dev, modify_memic, in, out);

	if (err)

		return err;



	*op_addr = dev->bar_addr +

		   MLX5_GET64(modify_memic_out, out, memic_operation_addr);

	return 0;

}



static int add_dm_mmap_entry(struct ib_ucontext *context,

			     struct mlx5_ib_dm_memic *mdm, u64 address)

{

drivers/infiniband/hw/mlx5/dm.h

+2 −0
Original line number Diff line number Diff line
@@ -49,5 +49,7 @@ struct ib_dm *mlx5_ib_alloc_dm(struct ib_device *ibdev, 
			       struct uverbs_attr_bundle *attrs);

void mlx5_cmd_dealloc_memic(struct mlx5_dm *dm, phys_addr_t addr,

			    u64 length);

void mlx5_cmd_dealloc_memic_op(struct mlx5_dm *dm, phys_addr_t addr,

			       u8 operation);



#endif /* _MLX5_IB_DM_H */