Commit 38ae6a53 authored by Yevgeny Petrilin's avatar Yevgeny Petrilin Committed by Roland Dreier
Browse files

mlx4_core: Add HW queues allocation helpers 



Wrap doorbell, buffer and MTT allocation in helper functions for
ethernet and FC modules to use.

Signed-off-by: default avatarYevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
parent 31d1e340

drivers/net/mlx4/alloc.c

+46 −0
Original line number Diff line number Diff line
@@ -307,3 +307,49 @@ void mlx4_db_free(struct mlx4_dev *dev, struct mlx4_db *db) 
	mutex_unlock(&priv->pgdir_mutex);

}

EXPORT_SYMBOL_GPL(mlx4_db_free);



int mlx4_alloc_hwq_res(struct mlx4_dev *dev, struct mlx4_hwq_resources *wqres,

		       int size, int max_direct)

{

	int err;



	err = mlx4_db_alloc(dev, &wqres->db, 1);

	if (err)

		return err;



	*wqres->db.db = 0;



	err = mlx4_buf_alloc(dev, size, max_direct, &wqres->buf);

	if (err)

		goto err_db;



	err = mlx4_mtt_init(dev, wqres->buf.npages, wqres->buf.page_shift,

			    &wqres->mtt);

	if (err)

		goto err_buf;



	err = mlx4_buf_write_mtt(dev, &wqres->mtt, &wqres->buf);

	if (err)

		goto err_mtt;



	return 0;



err_mtt:

	mlx4_mtt_cleanup(dev, &wqres->mtt);

err_buf:

	mlx4_buf_free(dev, size, &wqres->buf);

err_db:

	mlx4_db_free(dev, &wqres->db);



	return err;

}

EXPORT_SYMBOL_GPL(mlx4_alloc_hwq_res);



void mlx4_free_hwq_res(struct mlx4_dev *dev, struct mlx4_hwq_resources *wqres,

		       int size)

{

	mlx4_mtt_cleanup(dev, &wqres->mtt);

	mlx4_buf_free(dev, size, &wqres->buf);

	mlx4_db_free(dev, &wqres->db);

}

EXPORT_SYMBOL_GPL(mlx4_free_hwq_res);

include/linux/mlx4/device.h

+11 −0
Original line number Diff line number Diff line
@@ -234,6 +234,12 @@ struct mlx4_db { 
	int			order;

};



struct mlx4_hwq_resources {

	struct mlx4_db		db;

	struct mlx4_mtt		mtt;

	struct mlx4_buf		buf;

};



struct mlx4_mr {

	struct mlx4_mtt		mtt;

	u64			iova;
@@ -370,6 +376,11 @@ int mlx4_buf_write_mtt(struct mlx4_dev *dev, struct mlx4_mtt *mtt, 
int mlx4_db_alloc(struct mlx4_dev *dev, struct mlx4_db *db, int order);

void mlx4_db_free(struct mlx4_dev *dev, struct mlx4_db *db);



int mlx4_alloc_hwq_res(struct mlx4_dev *dev, struct mlx4_hwq_resources *wqres,

		       int size, int max_direct);

void mlx4_free_hwq_res(struct mlx4_dev *mdev, struct mlx4_hwq_resources *wqres,

		       int size);



int mlx4_cq_alloc(struct mlx4_dev *dev, int nent, struct mlx4_mtt *mtt,

		  struct mlx4_uar *uar, u64 db_rec, struct mlx4_cq *cq);

void mlx4_cq_free(struct mlx4_dev *dev, struct mlx4_cq *cq);