166 lines
4.4 KiB
C
Executable file
166 lines
4.4 KiB
C
Executable file
/*
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* Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
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* Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef RXE_POOL_H
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#define RXE_POOL_H
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#define RXE_POOL_ALIGN (16)
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#define RXE_POOL_CACHE_FLAGS (0)
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enum rxe_pool_flags {
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RXE_POOL_ATOMIC = BIT(0),
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RXE_POOL_INDEX = BIT(1),
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RXE_POOL_KEY = BIT(2),
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};
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enum rxe_elem_type {
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RXE_TYPE_UC,
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RXE_TYPE_PD,
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RXE_TYPE_AH,
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RXE_TYPE_SRQ,
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RXE_TYPE_QP,
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RXE_TYPE_CQ,
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RXE_TYPE_MR,
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RXE_TYPE_MW,
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RXE_TYPE_MC_GRP,
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RXE_TYPE_MC_ELEM,
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RXE_NUM_TYPES, /* keep me last */
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};
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struct rxe_pool_entry;
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struct rxe_type_info {
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const char *name;
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size_t size;
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void (*cleanup)(struct rxe_pool_entry *obj);
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enum rxe_pool_flags flags;
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u32 max_index;
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u32 min_index;
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size_t key_offset;
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size_t key_size;
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struct kmem_cache *cache;
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};
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extern struct rxe_type_info rxe_type_info[];
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enum rxe_pool_state {
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rxe_pool_invalid,
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rxe_pool_valid,
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};
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struct rxe_pool_entry {
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struct rxe_pool *pool;
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struct kref ref_cnt;
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struct list_head list;
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/* only used if indexed or keyed */
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struct rb_node node;
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u32 index;
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};
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struct rxe_pool {
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struct rxe_dev *rxe;
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spinlock_t pool_lock; /* pool spinlock */
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size_t elem_size;
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struct kref ref_cnt;
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void (*cleanup)(struct rxe_pool_entry *obj);
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enum rxe_pool_state state;
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enum rxe_pool_flags flags;
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enum rxe_elem_type type;
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unsigned int max_elem;
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atomic_t num_elem;
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/* only used if indexed or keyed */
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struct rb_root tree;
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unsigned long *table;
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size_t table_size;
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u32 max_index;
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u32 min_index;
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u32 last;
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size_t key_offset;
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size_t key_size;
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};
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/* initialize slab caches for managed objects */
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int rxe_cache_init(void);
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/* cleanup slab caches for managed objects */
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void rxe_cache_exit(void);
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/* initialize a pool of objects with given limit on
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* number of elements. gets parameters from rxe_type_info
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* pool elements will be allocated out of a slab cache
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*/
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int rxe_pool_init(struct rxe_dev *rxe, struct rxe_pool *pool,
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enum rxe_elem_type type, u32 max_elem);
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/* free resources from object pool */
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int rxe_pool_cleanup(struct rxe_pool *pool);
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/* allocate an object from pool */
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void *rxe_alloc(struct rxe_pool *pool);
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/* assign an index to an indexed object and insert object into
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* pool's rb tree
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*/
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void rxe_add_index(void *elem);
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/* drop an index and remove object from rb tree */
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void rxe_drop_index(void *elem);
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/* assign a key to a keyed object and insert object into
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* pool's rb tree
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*/
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void rxe_add_key(void *elem, void *key);
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/* remove elem from rb tree */
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void rxe_drop_key(void *elem);
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/* lookup an indexed object from index. takes a reference on object */
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void *rxe_pool_get_index(struct rxe_pool *pool, u32 index);
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/* lookup keyed object from key. takes a reference on the object */
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void *rxe_pool_get_key(struct rxe_pool *pool, void *key);
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/* cleanup an object when all references are dropped */
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void rxe_elem_release(struct kref *kref);
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/* take a reference on an object */
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#define rxe_add_ref(elem) kref_get(&(elem)->pelem.ref_cnt)
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/* drop a reference on an object */
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#define rxe_drop_ref(elem) kref_put(&(elem)->pelem.ref_cnt, rxe_elem_release)
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#endif /* RXE_POOL_H */
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