rte_eal_memconfig.h

/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2010-2014 Intel Corporation
 */

#ifndef _RTE_EAL_MEMCONFIG_H_
#define _RTE_EAL_MEMCONFIG_H_

#include <rte_config.h>
#include <rte_tailq.h>
#include <rte_memory.h>
#include <rte_memzone.h>
#include <rte_malloc_heap.h>
#include <rte_rwlock.h>
#include <rte_pause.h>
#include <rte_fbarray.h>

#ifdef __cplusplus
extern "C" {
#endif

struct rte_memseg_list {
    RTE_STD_C11
    union {
        void *base_va;
        uint64_t addr_64;
    };
    uint64_t page_sz; 
    int socket_id; 
    volatile uint32_t version; 
    size_t len; 
    unsigned int external; 
    struct rte_fbarray memseg_arr;
};

struct rte_mem_config {
    volatile uint32_t magic;   
    /* memory topology */
    uint32_t nchannel;    
    uint32_t nrank;       
    rte_rwlock_t mlock;   
    rte_rwlock_t qlock;   
    rte_rwlock_t mplock;  
    rte_rwlock_t memory_hotplug_lock;
    /* memory segments and zones */
    struct rte_fbarray memzones; 
    struct rte_memseg_list memsegs[RTE_MAX_MEMSEG_LISTS];
    struct rte_tailq_head tailq_head[RTE_MAX_TAILQ]; 
    /* Heaps of Malloc */
    struct malloc_heap malloc_heaps[RTE_MAX_HEAPS];

    /* next socket ID for external malloc heap */
    int next_socket_id;

    /* address of mem_config in primary process. used to map shared config into
     * exact same address the primary process maps it.
     */
    uint64_t mem_cfg_addr;

    /* legacy mem and single file segments options are shared */
    uint32_t legacy_mem;
    uint32_t single_file_segments;

    /* keeps the more restricted dma mask */
    uint8_t dma_maskbits;
} __attribute__((__packed__));


inline static void
rte_eal_mcfg_wait_complete(struct rte_mem_config* mcfg)
{
    /* wait until shared mem_config finish initialising */
    while(mcfg->magic != RTE_MAGIC)
        rte_pause();
}

#ifdef __cplusplus
}
#endif

#endif /*__RTE_EAL_MEMCONFIG_H_*/