diff options
Diffstat (limited to 'drivers/infiniband/sw/rxe/rxe_pool.h')
| -rw-r--r-- | drivers/infiniband/sw/rxe/rxe_pool.h | 163 |
1 files changed, 163 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..4d04830ad --- /dev/null +++ b/drivers/infiniband/sw/rxe/rxe_pool.h @@ -0,0 +1,163 @@ +/* + * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved. + * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#ifndef RXE_POOL_H +#define RXE_POOL_H + +#define RXE_POOL_ALIGN (16) +#define RXE_POOL_CACHE_FLAGS (0) + +enum rxe_pool_flags { + RXE_POOL_ATOMIC = BIT(0), + RXE_POOL_INDEX = BIT(1), + RXE_POOL_KEY = BIT(2), +}; + +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_TYPE_MC_GRP, + RXE_TYPE_MC_ELEM, + RXE_NUM_TYPES, /* keep me last */ +}; + +struct rxe_type_info { + char *name; + size_t size; + void (*cleanup)(void *obj); + enum rxe_pool_flags flags; + u32 max_index; + u32 min_index; + size_t key_offset; + size_t key_size; + struct kmem_cache *cache; +}; + +extern struct rxe_type_info rxe_type_info[]; + +enum rxe_pool_state { + rxe_pool_invalid, + rxe_pool_valid, +}; + +struct rxe_pool_entry { + struct rxe_pool *pool; + struct kref ref_cnt; + struct list_head list; + + /* only used if indexed or keyed */ + struct rb_node node; + u32 index; +}; + +struct rxe_pool { + struct rxe_dev *rxe; + spinlock_t pool_lock; /* pool spinlock */ + size_t elem_size; + struct kref ref_cnt; + void (*cleanup)(void *obj); + enum rxe_pool_state state; + enum rxe_pool_flags flags; + enum rxe_elem_type type; + + unsigned int max_elem; + atomic_t num_elem; + + /* only used if indexed or keyed */ + struct rb_root tree; + unsigned long *table; + size_t table_size; + u32 max_index; + u32 min_index; + u32 last; + size_t key_offset; + size_t key_size; +}; + +/* initialize slab caches for managed objects */ +int rxe_cache_init(void); + +/* cleanup slab caches for managed objects */ +void rxe_cache_exit(void); + +/* 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 + */ +int rxe_pool_init(struct rxe_dev *rxe, struct rxe_pool *pool, + enum rxe_elem_type type, u32 max_elem); + +/* free resources from object pool */ +int rxe_pool_cleanup(struct rxe_pool *pool); + +/* allocate an object from pool */ +void *rxe_alloc(struct rxe_pool *pool); + +/* assign an index to an indexed object and insert object into + * pool's rb tree + */ +void rxe_add_index(void *elem); + +/* drop an index and remove object from rb tree */ +void rxe_drop_index(void *elem); + +/* assign a key to a keyed object and insert object into + * pool's rb tree + */ +void rxe_add_key(void *elem, void *key); + +/* remove elem from rb tree */ +void rxe_drop_key(void *elem); + +/* lookup an indexed object from index. takes a reference on object */ +void *rxe_pool_get_index(struct rxe_pool *pool, u32 index); + +/* lookup keyed object from key. takes a reference on the object */ +void *rxe_pool_get_key(struct rxe_pool *pool, void *key); + +/* cleanup an object when all references are dropped */ +void rxe_elem_release(struct kref *kref); + +/* take a reference on an object */ +#define rxe_add_ref(elem) kref_get(&(elem)->pelem.ref_cnt) + +/* drop a reference on an object */ +#define rxe_drop_ref(elem) kref_put(&(elem)->pelem.ref_cnt, rxe_elem_release) + +#endif /* RXE_POOL_H */ |