1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2014 Intel Corporation
5 #ifndef _RTE_EAL_MEMCONFIG_H_
6 #define _RTE_EAL_MEMCONFIG_H_
8 #include <rte_config.h>
10 #include <rte_memory.h>
11 #include <rte_memzone.h>
12 #include <rte_malloc_heap.h>
13 #include <rte_rwlock.h>
14 #include <rte_pause.h>
15 #include <rte_fbarray.h>
22 * memseg list is a special case as we need to store a bunch of other data
23 * together with the array itself.
25 struct rte_memseg_list {
29 /**< Base virtual address for this memseg list. */
31 /**< Makes sure addr is always 64-bits */
33 int socket_id; /**< Socket ID for all memsegs in this list. */
34 uint64_t page_sz; /**< Page size for all memsegs in this list. */
35 volatile uint32_t version; /**< version number for multiprocess sync. */
36 struct rte_fbarray memseg_arr;
40 * the structure for the memory configuration for the RTE.
41 * Used by the rte_config structure. It is separated out, as for multi-process
42 * support, the memory details should be shared across instances
44 struct rte_mem_config {
45 volatile uint32_t magic; /**< Magic number - Sanity check. */
48 uint32_t nchannel; /**< Number of channels (0 if unknown). */
49 uint32_t nrank; /**< Number of ranks (0 if unknown). */
52 * current lock nest order
53 * - qlock->mlock (ring/hash/lpm)
54 * - mplock->qlock->mlock (mempool)
56 * *ALWAYS* obtain qlock first if having to obtain both qlock and mlock
58 rte_rwlock_t mlock; /**< only used by memzone LIB for thread-safe. */
59 rte_rwlock_t qlock; /**< used for tailq operation for thread safe. */
60 rte_rwlock_t mplock; /**< only used by mempool LIB for thread-safe. */
62 rte_rwlock_t memory_hotplug_lock;
63 /**< indicates whether memory hotplug request is in progress. */
65 /* memory segments and zones */
66 struct rte_fbarray memzones; /**< Memzone descriptors. */
68 struct rte_memseg_list memsegs[RTE_MAX_MEMSEG_LISTS];
69 /**< list of dynamic arrays holding memsegs */
71 struct rte_tailq_head tailq_head[RTE_MAX_TAILQ]; /**< Tailqs for objects */
73 /* Heaps of Malloc per socket */
74 struct malloc_heap malloc_heaps[RTE_MAX_NUMA_NODES];
76 /* address of mem_config in primary process. used to map shared config into
77 * exact same address the primary process maps it.
79 uint64_t mem_cfg_addr;
80 } __attribute__((__packed__));
84 rte_eal_mcfg_wait_complete(struct rte_mem_config* mcfg)
86 /* wait until shared mem_config finish initialising */
87 while(mcfg->magic != RTE_MAGIC)
95 #endif /*__RTE_EAL_MEMCONFIG_H_*/