1 files changed, 85 insertions, 0 deletions
diff --git a/drivers/infiniband/sw/rxe/rxe_pool.h b/drivers/infiniband/sw/rxe/rxe_pool.h
new file mode 100644
index 000000000..9d83cb320
--- /dev/null
+++ b/drivers/infiniband/sw/rxe/rxe_pool.h
@@ -0,0 +1,85 @@
+/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
+/*
+ * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
+ * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
+ */
+
+#ifndef RXE_POOL_H
+#define RXE_POOL_H
+
+enum rxe_elem_type {
+	RXE_TYPE_UC,
+	RXE_TYPE_PD,
+	RXE_TYPE_AH,
+	RXE_TYPE_SRQ,
+	RXE_TYPE_QP,
+	RXE_TYPE_CQ,
+	RXE_TYPE_MR,
+	RXE_TYPE_MW,
+	RXE_NUM_TYPES,		/* keep me last */
+};
+
+struct rxe_pool_elem {
+	struct rxe_pool		*pool;
+	void			*obj;
+	struct kref		ref_cnt;
+	struct list_head	list;
+	struct completion	complete;
+	u32			index;
+};
+
+struct rxe_pool {
+	struct rxe_dev		*rxe;
+	const char		*name;
+	void			(*cleanup)(struct rxe_pool_elem *elem);
+	enum rxe_elem_type	type;
+
+	unsigned int		max_elem;
+	atomic_t		num_elem;
+	size_t			elem_size;
+	size_t			elem_offset;
+
+	struct xarray		xa;
+	struct xa_limit		limit;
+	u32			next;
+};
+
+/* initialize a pool of objects with given limit on
+ * number of elements. gets parameters from rxe_type_info
+ * pool elements will be allocated out of a slab cache
+ */
+void rxe_pool_init(struct rxe_dev *rxe, struct rxe_pool *pool,
+		  enum rxe_elem_type type);
+
+/* free resources from object pool */
+void rxe_pool_cleanup(struct rxe_pool *pool);
+
+/* allocate an object from pool */
+void *rxe_alloc(struct rxe_pool *pool);
+
+/* connect already allocated object to pool */
+int __rxe_add_to_pool(struct rxe_pool *pool, struct rxe_pool_elem *elem,
+				bool sleepable);
+#define rxe_add_to_pool(pool, obj) __rxe_add_to_pool(pool, &(obj)->elem, true)
+#define rxe_add_to_pool_ah(pool, obj, sleepable) __rxe_add_to_pool(pool, \
+				&(obj)->elem, sleepable)
+
+/* lookup an indexed object from index. takes a reference on object */
+void *rxe_pool_get_index(struct rxe_pool *pool, u32 index);
+
+int __rxe_get(struct rxe_pool_elem *elem);
+#define rxe_get(obj) __rxe_get(&(obj)->elem)
+
+int __rxe_put(struct rxe_pool_elem *elem);
+#define rxe_put(obj) __rxe_put(&(obj)->elem)
+
+int __rxe_cleanup(struct rxe_pool_elem *elem, bool sleepable);
+#define rxe_cleanup(obj) __rxe_cleanup(&(obj)->elem, true)
+#define rxe_cleanup_ah(obj, sleepable) __rxe_cleanup(&(obj)->elem, sleepable)
+
+#define rxe_read(obj) kref_read(&(obj)->elem.ref_cnt)
+
+void __rxe_finalize(struct rxe_pool_elem *elem);
+#define rxe_finalize(obj) __rxe_finalize(&(obj)->elem)
+
+#endif /* RXE_POOL_H */