1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2014 Intel Corporation
10 #include <sys/queue.h>
12 #include <rte_memory.h>
14 #include <rte_eal_memconfig.h>
15 #include <rte_launch.h>
16 #include <rte_per_lcore.h>
17 #include <rte_lcore.h>
18 #include <rte_common.h>
19 #include <rte_string_fns.h>
20 #include <rte_spinlock.h>
21 #include <rte_memcpy.h>
22 #include <rte_atomic.h>
24 #include "malloc_elem.h"
25 #include "malloc_heap.h"
28 check_hugepage_sz(unsigned flags, uint64_t hugepage_sz)
30 unsigned check_flag = 0;
32 if (!(flags & ~RTE_MEMZONE_SIZE_HINT_ONLY))
35 switch (hugepage_sz) {
37 check_flag = RTE_MEMZONE_256KB;
40 check_flag = RTE_MEMZONE_2MB;
43 check_flag = RTE_MEMZONE_16MB;
46 check_flag = RTE_MEMZONE_256MB;
49 check_flag = RTE_MEMZONE_512MB;
52 check_flag = RTE_MEMZONE_1GB;
55 check_flag = RTE_MEMZONE_4GB;
58 check_flag = RTE_MEMZONE_16GB;
61 return check_flag & flags;
65 * Expand the heap with a memseg.
66 * This reserves the zone and sets a dummy malloc_elem header at the end
67 * to prevent overflow. The rest of the zone is added to free list as a single
71 malloc_heap_add_memseg(struct malloc_heap *heap, struct rte_memseg *ms)
73 /* allocate the memory block headers, one at end, one at start */
74 struct malloc_elem *start_elem = (struct malloc_elem *)ms->addr;
75 struct malloc_elem *end_elem = RTE_PTR_ADD(ms->addr,
76 ms->len - MALLOC_ELEM_OVERHEAD);
77 end_elem = RTE_PTR_ALIGN_FLOOR(end_elem, RTE_CACHE_LINE_SIZE);
78 const size_t elem_size = (uintptr_t)end_elem - (uintptr_t)start_elem;
80 malloc_elem_init(start_elem, heap, ms, elem_size);
81 malloc_elem_mkend(end_elem, start_elem);
82 malloc_elem_free_list_insert(start_elem);
84 heap->total_size += elem_size;
88 * Iterates through the freelist for a heap to find a free element
89 * which can store data of the required size and with the requested alignment.
90 * If size is 0, find the biggest available elem.
91 * Returns null on failure, or pointer to element on success.
93 static struct malloc_elem *
94 find_suitable_element(struct malloc_heap *heap, size_t size,
95 unsigned flags, size_t align, size_t bound)
98 struct malloc_elem *elem, *alt_elem = NULL;
100 for (idx = malloc_elem_free_list_index(size);
101 idx < RTE_HEAP_NUM_FREELISTS; idx++) {
102 for (elem = LIST_FIRST(&heap->free_head[idx]);
103 !!elem; elem = LIST_NEXT(elem, free_list)) {
104 if (malloc_elem_can_hold(elem, size, align, bound)) {
105 if (check_hugepage_sz(flags, elem->ms->hugepage_sz))
107 if (alt_elem == NULL)
113 if ((alt_elem != NULL) && (flags & RTE_MEMZONE_SIZE_HINT_ONLY))
120 * Main function to allocate a block of memory from the heap.
121 * It locks the free list, scans it, and adds a new memseg if the
122 * scan fails. Once the new memseg is added, it re-scans and should return
123 * the new element after releasing the lock.
126 malloc_heap_alloc(struct malloc_heap *heap,
127 const char *type __attribute__((unused)), size_t size, unsigned flags,
128 size_t align, size_t bound)
130 struct malloc_elem *elem;
132 size = RTE_CACHE_LINE_ROUNDUP(size);
133 align = RTE_CACHE_LINE_ROUNDUP(align);
135 rte_spinlock_lock(&heap->lock);
137 elem = find_suitable_element(heap, size, flags, align, bound);
139 elem = malloc_elem_alloc(elem, size, align, bound);
140 /* increase heap's count of allocated elements */
143 rte_spinlock_unlock(&heap->lock);
145 return elem == NULL ? NULL : (void *)(&elem[1]);
149 * Function to retrieve data for heap on given socket
152 malloc_heap_get_stats(struct malloc_heap *heap,
153 struct rte_malloc_socket_stats *socket_stats)
156 struct malloc_elem *elem;
158 rte_spinlock_lock(&heap->lock);
160 /* Initialise variables for heap */
161 socket_stats->free_count = 0;
162 socket_stats->heap_freesz_bytes = 0;
163 socket_stats->greatest_free_size = 0;
165 /* Iterate through free list */
166 for (idx = 0; idx < RTE_HEAP_NUM_FREELISTS; idx++) {
167 for (elem = LIST_FIRST(&heap->free_head[idx]);
168 !!elem; elem = LIST_NEXT(elem, free_list))
170 socket_stats->free_count++;
171 socket_stats->heap_freesz_bytes += elem->size;
172 if (elem->size > socket_stats->greatest_free_size)
173 socket_stats->greatest_free_size = elem->size;
176 /* Get stats on overall heap and allocated memory on this heap */
177 socket_stats->heap_totalsz_bytes = heap->total_size;
178 socket_stats->heap_allocsz_bytes = (socket_stats->heap_totalsz_bytes -
179 socket_stats->heap_freesz_bytes);
180 socket_stats->alloc_count = heap->alloc_count;
182 rte_spinlock_unlock(&heap->lock);
187 rte_eal_malloc_heap_init(void)
189 struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
191 struct rte_memseg *ms;
196 for (ms = &mcfg->memseg[0], ms_cnt = 0;
197 (ms_cnt < RTE_MAX_MEMSEG) && (ms->len > 0);
199 malloc_heap_add_memseg(&mcfg->malloc_heaps[ms->socket_id], ms);