>From 3b15a6bba9cb79805198f64985433a33a3a096dc Mon Sep 17 00:00:00 2001
From: Yevgeny Petrilin <[EMAIL PROTECTED]>
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 <[EMAIL PROTECTED]>
---
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
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