[ofa-general][PATCH 2/12 v1] mlx4: HW queues resource management

[Yevgeny Petrilin]

>From 3b15a6bba9cb79805198f64985433a33a3a096dc Mon Sep 17 00:00:00 2001
From: Yevgeny Petrilin <yevgenyp at mellanox.co.il>
Date: Mon, 21 Apr 2008 11:06:41 +0300
Subject: [PATCH] mlx4_core: HW queues resource management

Added HW queues management API.
Wraps buffer and doorbell allocation and mtt write.

Signed-off-by: Yevgeny Petrilin <yevgenyp at mellanox.co.il>
---
 drivers/net/mlx4/alloc.c    |   44 +++++++++++++++++++++++++++++++++++++++++++
 include/linux/mlx4/device.h |   11 ++++++++++
 2 files changed, 55 insertions(+), 0 deletions(-)

diff --git a/drivers/net/mlx4/alloc.c b/drivers/net/mlx4/alloc.c
index 43c6d04..f36d79e 100644
--- a/drivers/net/mlx4/alloc.c
+++ b/drivers/net/mlx4/alloc.c
@@ -307,3 +307,47 @@ 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;
+
+	if (mlx4_buf_alloc(dev, size, max_direct, &wqres->buf)) {
+		err = -ENOMEM;
+		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);
diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index d5fb774..0505732 100644
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -241,6 +241,12 @@ 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;
@@ -377,6 +383,11 @@ 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);
-- 
1.5.4