ceph/src/spdk/dpdk/lib/librte_mempool/rte_mempool_ops.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2016 Intel Corporation.
   3  * Copyright(c) 2016 6WIND S.A.
   4  */
   5
   6 #include <stdio.h>
   7 #include <string.h>
   8
   9 #include <rte_mempool.h>
  10 #include <rte_errno.h>
  11 #include <rte_dev.h>
  12
  13 /* indirect jump table to support external memory pools. */
  14 struct rte_mempool_ops_table rte_mempool_ops_table = {
  15         .sl =  RTE_SPINLOCK_INITIALIZER,
  16         .num_ops = 0
  17 };
  18
  19 /* add a new ops struct in rte_mempool_ops_table, return its index. */
  20 int
  21 rte_mempool_register_ops(const struct rte_mempool_ops *h)
  22 {
  23         struct rte_mempool_ops *ops;
  24         int16_t ops_index;
  25
  26         rte_spinlock_lock(&rte_mempool_ops_table.sl);
  27
  28         if (rte_mempool_ops_table.num_ops >=
  29                         RTE_MEMPOOL_MAX_OPS_IDX) {
  30                 rte_spinlock_unlock(&rte_mempool_ops_table.sl);
  31                 RTE_LOG(ERR, MEMPOOL,
  32                         "Maximum number of mempool ops structs exceeded\n");
  33                 return -ENOSPC;
  34         }
  35
  36         if (h->alloc == NULL || h->enqueue == NULL ||
  37                         h->dequeue == NULL || h->get_count == NULL) {
  38                 rte_spinlock_unlock(&rte_mempool_ops_table.sl);
  39                 RTE_LOG(ERR, MEMPOOL,
  40                         "Missing callback while registering mempool ops\n");
  41                 return -EINVAL;
  42         }
  43
  44         if (strlen(h->name) >= sizeof(ops->name) - 1) {
  45                 rte_spinlock_unlock(&rte_mempool_ops_table.sl);
  46                 RTE_LOG(DEBUG, EAL, "%s(): mempool_ops <%s>: name too long\n",
  47                                 __func__, h->name);
  48                 rte_errno = EEXIST;
  49                 return -EEXIST;
  50         }
  51
  52         ops_index = rte_mempool_ops_table.num_ops++;
  53         ops = &rte_mempool_ops_table.ops[ops_index];
  54         snprintf(ops->name, sizeof(ops->name), "%s", h->name);
  55         ops->alloc = h->alloc;
  56         ops->free = h->free;
  57         ops->enqueue = h->enqueue;
  58         ops->dequeue = h->dequeue;
  59         ops->get_count = h->get_count;
  60         ops->calc_mem_size = h->calc_mem_size;
  61         ops->populate = h->populate;
  62         ops->get_info = h->get_info;
  63         ops->dequeue_contig_blocks = h->dequeue_contig_blocks;
  64
  65         rte_spinlock_unlock(&rte_mempool_ops_table.sl);
  66
  67         return ops_index;
  68 }
  69
  70 /* wrapper to allocate an external mempool's private (pool) data. */
  71 int
  72 rte_mempool_ops_alloc(struct rte_mempool *mp)
  73 {
  74         struct rte_mempool_ops *ops;
  75
  76         ops = rte_mempool_get_ops(mp->ops_index);
  77         return ops->alloc(mp);
  78 }
  79
  80 /* wrapper to free an external pool ops. */
  81 void
  82 rte_mempool_ops_free(struct rte_mempool *mp)
  83 {
  84         struct rte_mempool_ops *ops;
  85
  86         ops = rte_mempool_get_ops(mp->ops_index);
  87         if (ops->free == NULL)
  88                 return;
  89         ops->free(mp);
  90 }
  91
  92 /* wrapper to get available objects in an external mempool. */
  93 unsigned int
  94 rte_mempool_ops_get_count(const struct rte_mempool *mp)
  95 {
  96         struct rte_mempool_ops *ops;
  97
  98         ops = rte_mempool_get_ops(mp->ops_index);
  99         return ops->get_count(mp);
 100 }
 101
 102 /* wrapper to notify new memory area to external mempool */
 103 ssize_t
 104 rte_mempool_ops_calc_mem_size(const struct rte_mempool *mp,
 105                                 uint32_t obj_num, uint32_t pg_shift,
 106                                 size_t *min_chunk_size, size_t *align)
 107 {
 108         struct rte_mempool_ops *ops;
 109
 110         ops = rte_mempool_get_ops(mp->ops_index);
 111
 112         if (ops->calc_mem_size == NULL)
 113                 return rte_mempool_op_calc_mem_size_default(mp, obj_num,
 114                                 pg_shift, min_chunk_size, align);
 115
 116         return ops->calc_mem_size(mp, obj_num, pg_shift, min_chunk_size, align);
 117 }
 118
 119 /* wrapper to populate memory pool objects using provided memory chunk */
 120 int
 121 rte_mempool_ops_populate(struct rte_mempool *mp, unsigned int max_objs,
 122                                 void *vaddr, rte_iova_t iova, size_t len,
 123                                 rte_mempool_populate_obj_cb_t *obj_cb,
 124                                 void *obj_cb_arg)
 125 {
 126         struct rte_mempool_ops *ops;
 127
 128         ops = rte_mempool_get_ops(mp->ops_index);
 129
 130         if (ops->populate == NULL)
 131                 return rte_mempool_op_populate_default(mp, max_objs, vaddr,
 132                                                        iova, len, obj_cb,
 133                                                        obj_cb_arg);
 134
 135         return ops->populate(mp, max_objs, vaddr, iova, len, obj_cb,
 136                              obj_cb_arg);
 137 }
 138
 139 /* wrapper to get additional mempool info */
 140 int
 141 rte_mempool_ops_get_info(const struct rte_mempool *mp,
 142                          struct rte_mempool_info *info)
 143 {
 144         struct rte_mempool_ops *ops;
 145
 146         ops = rte_mempool_get_ops(mp->ops_index);
 147
 148         RTE_FUNC_PTR_OR_ERR_RET(ops->get_info, -ENOTSUP);
 149         return ops->get_info(mp, info);
 150 }
 151
 152
 153 /* sets mempool ops previously registered by rte_mempool_register_ops. */
 154 int
 155 rte_mempool_set_ops_byname(struct rte_mempool *mp, const char *name,
 156         void *pool_config)
 157 {
 158         struct rte_mempool_ops *ops = NULL;
 159         unsigned i;
 160
 161         /* too late, the mempool is already populated. */
 162         if (mp->flags & MEMPOOL_F_POOL_CREATED)
 163                 return -EEXIST;
 164
 165         for (i = 0; i < rte_mempool_ops_table.num_ops; i++) {
 166                 if (!strcmp(name,
 167                                 rte_mempool_ops_table.ops[i].name)) {
 168                         ops = &rte_mempool_ops_table.ops[i];
 169                         break;
 170                 }
 171         }
 172
 173         if (ops == NULL)
 174                 return -EINVAL;
 175
 176         mp->ops_index = i;
 177         mp->pool_config = pool_config;
 178         return 0;
 179 }