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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 * 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_contigmem_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].len = internal_config.memory;
79 mcfg->memseg[0].socket_id = 0;
83 /* map all hugepages and sort them */
84 for (i = 0; i < internal_config.num_hugepage_sizes; i ++){
85 struct hugepage_info *hpi;
87 hpi = &internal_config.hugepage_info[i];
88 for (j = 0; j < hpi->num_pages[0]; j++) {
89 struct rte_memseg *seg;
92 size_t sysctl_size = sizeof(physaddr);
93 char physaddr_str[64];
95 addr = mmap(NULL, hpi->hugepage_sz, PROT_READ|PROT_WRITE,
96 MAP_SHARED, hpi->lock_descriptor, j * PAGE_SIZE);
97 if (addr == MAP_FAILED) {
98 RTE_LOG(ERR, EAL, "Failed to mmap buffer %u from %s\n",
103 snprintf(physaddr_str, sizeof(physaddr_str), "hw.contigmem"
105 error = sysctlbyname(physaddr_str, &physaddr, &sysctl_size,
108 RTE_LOG(ERR, EAL, "Failed to get physical addr for buffer %u "
109 "from %s\n", j, hpi->hugedir);
113 seg = &mcfg->memseg[seg_idx++];
115 seg->phys_addr = physaddr;
116 seg->hugepage_sz = hpi->hugepage_sz;
117 seg->len = hpi->hugepage_sz;
118 seg->nchannel = mcfg->nchannel;
119 seg->nrank = mcfg->nrank;
122 RTE_LOG(INFO, EAL, "Mapped memory segment %u @ %p: physaddr:0x%"
124 seg_idx, addr, physaddr, hpi->hugepage_sz);
125 if (total_mem >= internal_config.memory ||
126 seg_idx >= RTE_MAX_MEMSEG)
134 rte_eal_contigmem_attach(void)
136 const struct hugepage_info *hpi;
137 int fd_hugepage_info, fd_hugepage = -1;
139 struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
141 /* Obtain a file descriptor for hugepage_info */
142 fd_hugepage_info = open(eal_hugepage_info_path(), O_RDONLY);
143 if (fd_hugepage_info < 0) {
144 RTE_LOG(ERR, EAL, "Could not open %s\n", eal_hugepage_info_path());
148 /* Map the shared hugepage_info into the process address spaces */
149 hpi = mmap(NULL, sizeof(struct hugepage_info), PROT_READ, MAP_PRIVATE,
150 fd_hugepage_info, 0);
152 RTE_LOG(ERR, EAL, "Could not mmap %s\n", eal_hugepage_info_path());
156 /* Obtain a file descriptor for contiguous memory */
157 fd_hugepage = open(hpi->hugedir, O_RDWR);
158 if (fd_hugepage < 0) {
159 RTE_LOG(ERR, EAL, "Could not open %s\n", hpi->hugedir);
163 /* Map the contiguous memory into each memory segment */
164 for (i = 0; i < hpi->num_pages[0]; i++) {
167 struct rte_memseg *seg = &mcfg->memseg[i];
169 addr = mmap(seg->addr, hpi->hugepage_sz, PROT_READ|PROT_WRITE,
170 MAP_SHARED|MAP_FIXED, fd_hugepage, i * PAGE_SIZE);
171 if (addr == MAP_FAILED || addr != seg->addr) {
172 RTE_LOG(ERR, EAL, "Failed to mmap buffer %u from %s\n",
179 /* hugepage_info is no longer required */
180 munmap((void *)(uintptr_t)hpi, sizeof(struct hugepage_info));
181 close(fd_hugepage_info);
186 if (fd_hugepage_info >= 0)
187 close(fd_hugepage_info);
188 if (fd_hugepage >= 0)
195 rte_eal_memdevice_init(void)
197 struct rte_config *config;
199 if (rte_eal_process_type() == RTE_PROC_SECONDARY)
202 config = rte_eal_get_configuration();
203 config->mem_config->nchannel = internal_config.force_nchannel;
204 config->mem_config->nrank = internal_config.force_nrank;
209 /* init memory subsystem */
211 rte_eal_memory_init(void)
213 RTE_LOG(INFO, EAL, "Setting up physically contiguous memory...\n");
214 const int retval = rte_eal_process_type() == RTE_PROC_PRIMARY ?
215 rte_eal_contigmem_init() :
216 rte_eal_contigmem_attach();
220 if (internal_config.no_shconf == 0 && rte_eal_memdevice_init() < 0)