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35 #include <sys/types.h>
36 #include <sys/sysctl.h>
41 #include <rte_eal_memconfig.h>
43 #include <rte_string_fns.h>
44 #include "eal_private.h"
45 #include "eal_internal_cfg.h"
46 #include "eal_filesystem.h"
48 #define PAGE_SIZE (sysconf(_SC_PAGESIZE))
51 rte_eal_contigmem_init(void)
53 struct rte_mem_config *mcfg;
54 uint64_t total_mem = 0;
56 unsigned i, j, seg_idx = 0;
58 /* get pointer to global configuration */
59 mcfg = rte_eal_get_configuration()->mem_config;
61 /* for debug purposes, hugetlbfs can be disabled */
62 if (internal_config.no_hugetlbfs) {
63 addr = malloc(internal_config.memory);
64 mcfg->memseg[0].phys_addr = (phys_addr_t)(uintptr_t)addr;
65 mcfg->memseg[0].addr = addr;
66 mcfg->memseg[0].len = internal_config.memory;
67 mcfg->memseg[0].socket_id = 0;
71 /* map all hugepages and sort them */
72 for (i = 0; i < internal_config.num_hugepage_sizes; i ++){
73 struct hugepage_info *hpi;
75 hpi = &internal_config.hugepage_info[i];
76 for (j = 0; j < hpi->num_pages[0]; j++) {
77 struct rte_memseg *seg;
80 size_t sysctl_size = sizeof(physaddr);
81 char physaddr_str[64];
83 addr = mmap(NULL, hpi->hugepage_sz, PROT_READ|PROT_WRITE,
84 MAP_SHARED, hpi->lock_descriptor, j * PAGE_SIZE);
85 if (addr == MAP_FAILED) {
86 RTE_LOG(ERR, EAL, "Failed to mmap buffer %u from %s\n",
91 rte_snprintf(physaddr_str, sizeof(physaddr_str), "hw.contigmem"
93 error = sysctlbyname(physaddr_str, &physaddr, &sysctl_size,
96 RTE_LOG(ERR, EAL, "Failed to get physical addr for buffer %u "
97 "from %s\n", j, hpi->hugedir);
101 seg = &mcfg->memseg[seg_idx++];
103 seg->phys_addr = physaddr;
104 seg->hugepage_sz = hpi->hugepage_sz;
105 seg->len = hpi->hugepage_sz;
106 seg->nchannel = mcfg->nchannel;
107 seg->nrank = mcfg->nrank;
110 RTE_LOG(INFO, EAL, "Mapped memory segment %u @ %p: physaddr:0x%"
112 seg_idx, addr, physaddr, hpi->hugepage_sz);
113 if (total_mem >= internal_config.memory ||
114 seg_idx >= RTE_MAX_MEMSEG)
122 rte_eal_contigmem_attach(void)
124 const struct hugepage_info *hpi;
125 int fd_hugepage_info, fd_hugepage = -1;
127 struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
129 /* Obtain a file descriptor for hugepage_info */
130 fd_hugepage_info = open(eal_hugepage_info_path(), O_RDONLY);
131 if (fd_hugepage_info < 0) {
132 RTE_LOG(ERR, EAL, "Could not open %s\n", eal_hugepage_info_path());
136 /* Map the shared hugepage_info into the process address spaces */
137 hpi = mmap(NULL, sizeof(struct hugepage_info), PROT_READ, MAP_PRIVATE,
138 fd_hugepage_info, 0);
140 RTE_LOG(ERR, EAL, "Could not mmap %s\n", eal_hugepage_info_path());
144 /* Obtain a file descriptor for contiguous memory */
145 fd_hugepage = open(hpi->hugedir, O_RDWR);
146 if (fd_hugepage < 0) {
147 RTE_LOG(ERR, EAL, "Could not open %s\n", hpi->hugedir);
151 /* Map the contiguous memory into each memory segment */
152 for (i = 0; i < hpi->num_pages[0]; i++) {
155 struct rte_memseg *seg = &mcfg->memseg[i];
157 addr = mmap(seg->addr, hpi->hugepage_sz, PROT_READ|PROT_WRITE,
158 MAP_SHARED|MAP_FIXED, fd_hugepage, i * PAGE_SIZE);
159 if (addr == MAP_FAILED || addr != seg->addr) {
160 RTE_LOG(ERR, EAL, "Failed to mmap buffer %u from %s\n",
167 /* hugepage_info is no longer required */
168 munmap((void *)(uintptr_t)hpi, sizeof(struct hugepage_info));
169 close(fd_hugepage_info);
174 if (fd_hugepage_info >= 0)
175 close(fd_hugepage_info);
176 if (fd_hugepage >= 0)
183 rte_eal_memdevice_init(void)
185 struct rte_config *config;
187 if (rte_eal_process_type() == RTE_PROC_SECONDARY)
190 config = rte_eal_get_configuration();
191 config->mem_config->nchannel = internal_config.force_nchannel;
192 config->mem_config->nrank = internal_config.force_nrank;
197 /* init memory subsystem */
199 rte_eal_memory_init(void)
201 RTE_LOG(INFO, EAL, "Setting up physically contiguous memory...\n");
202 const int retval = rte_eal_process_type() == RTE_PROC_PRIMARY ?
203 rte_eal_contigmem_init() :
204 rte_eal_contigmem_attach();
208 if (internal_config.no_shconf == 0 && rte_eal_memdevice_init() < 0)