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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 EAL_PAGE_SIZE (sysconf(_SC_PAGESIZE))
51 * Get physical address of any mapped virtual address in the current process.
54 rte_mem_virt2phy(const void *virtaddr)
56 /* XXX not implemented. This function is only used by
57 * rte_mempool_virt2phy() when hugepages are disabled. */
59 return RTE_BAD_PHYS_ADDR;
63 rte_eal_hugepage_init(void)
65 struct rte_mem_config *mcfg;
66 uint64_t total_mem = 0;
68 unsigned i, j, seg_idx = 0;
70 /* get pointer to global configuration */
71 mcfg = rte_eal_get_configuration()->mem_config;
73 /* for debug purposes, hugetlbfs can be disabled */
74 if (internal_config.no_hugetlbfs) {
75 addr = malloc(internal_config.memory);
76 mcfg->memseg[0].phys_addr = (phys_addr_t)(uintptr_t)addr;
77 mcfg->memseg[0].addr = addr;
78 mcfg->memseg[0].hugepage_sz = RTE_PGSIZE_4K;
79 mcfg->memseg[0].len = internal_config.memory;
80 mcfg->memseg[0].socket_id = 0;
84 /* map all hugepages and sort them */
85 for (i = 0; i < internal_config.num_hugepage_sizes; i ++){
86 struct hugepage_info *hpi;
88 hpi = &internal_config.hugepage_info[i];
89 for (j = 0; j < hpi->num_pages[0]; j++) {
90 struct rte_memseg *seg;
93 size_t sysctl_size = sizeof(physaddr);
94 char physaddr_str[64];
96 addr = mmap(NULL, hpi->hugepage_sz, PROT_READ|PROT_WRITE,
97 MAP_SHARED, hpi->lock_descriptor,
99 if (addr == MAP_FAILED) {
100 RTE_LOG(ERR, EAL, "Failed to mmap buffer %u from %s\n",
105 snprintf(physaddr_str, sizeof(physaddr_str), "hw.contigmem"
107 error = sysctlbyname(physaddr_str, &physaddr, &sysctl_size,
110 RTE_LOG(ERR, EAL, "Failed to get physical addr for buffer %u "
111 "from %s\n", j, hpi->hugedir);
115 seg = &mcfg->memseg[seg_idx++];
117 seg->phys_addr = physaddr;
118 seg->hugepage_sz = hpi->hugepage_sz;
119 seg->len = hpi->hugepage_sz;
120 seg->nchannel = mcfg->nchannel;
121 seg->nrank = mcfg->nrank;
124 RTE_LOG(INFO, EAL, "Mapped memory segment %u @ %p: physaddr:0x%"
126 seg_idx, addr, physaddr, hpi->hugepage_sz);
127 if (total_mem >= internal_config.memory ||
128 seg_idx >= RTE_MAX_MEMSEG)
136 rte_eal_hugepage_attach(void)
138 const struct hugepage_info *hpi;
139 int fd_hugepage_info, fd_hugepage = -1;
141 struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
143 /* Obtain a file descriptor for hugepage_info */
144 fd_hugepage_info = open(eal_hugepage_info_path(), O_RDONLY);
145 if (fd_hugepage_info < 0) {
146 RTE_LOG(ERR, EAL, "Could not open %s\n", eal_hugepage_info_path());
150 /* Map the shared hugepage_info into the process address spaces */
151 hpi = mmap(NULL, sizeof(struct hugepage_info), PROT_READ, MAP_PRIVATE,
152 fd_hugepage_info, 0);
154 RTE_LOG(ERR, EAL, "Could not mmap %s\n", eal_hugepage_info_path());
158 /* Obtain a file descriptor for contiguous memory */
159 fd_hugepage = open(hpi->hugedir, O_RDWR);
160 if (fd_hugepage < 0) {
161 RTE_LOG(ERR, EAL, "Could not open %s\n", hpi->hugedir);
165 /* Map the contiguous memory into each memory segment */
166 for (i = 0; i < hpi->num_pages[0]; i++) {
169 struct rte_memseg *seg = &mcfg->memseg[i];
171 addr = mmap(seg->addr, hpi->hugepage_sz, PROT_READ|PROT_WRITE,
172 MAP_SHARED|MAP_FIXED, fd_hugepage,
174 if (addr == MAP_FAILED || addr != seg->addr) {
175 RTE_LOG(ERR, EAL, "Failed to mmap buffer %u from %s\n",
182 /* hugepage_info is no longer required */
183 munmap((void *)(uintptr_t)hpi, sizeof(struct hugepage_info));
184 close(fd_hugepage_info);
189 if (fd_hugepage_info >= 0)
190 close(fd_hugepage_info);
191 if (fd_hugepage >= 0)