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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 | /* * 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 */ |