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Commit 38ae6a53 authored by Yevgeny Petrilin's avatar Yevgeny Petrilin Committed by Roland Dreier
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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
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+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);
+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);