--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <sys/mman.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/sysctl.h>
+#include <inttypes.h>
+#include <fcntl.h>
+
+#include <rte_eal.h>
+#include <rte_eal_memconfig.h>
+#include <rte_log.h>
+#include <rte_string_fns.h>
+#include "eal_private.h"
+#include "eal_internal_cfg.h"
+#include "eal_filesystem.h"
+
+#define EAL_PAGE_SIZE (sysconf(_SC_PAGESIZE))
+
+/*
+ * Get physical address of any mapped virtual address in the current process.
+ */
+phys_addr_t
+rte_mem_virt2phy(const void *virtaddr)
+{
+ /* XXX not implemented. This function is only used by
+ * rte_mempool_virt2phy() when hugepages are disabled. */
+ (void)virtaddr;
+ return RTE_BAD_PHYS_ADDR;
+}
+
+int
+rte_eal_hugepage_init(void)
+{
+ struct rte_mem_config *mcfg;
+ uint64_t total_mem = 0;
+ void *addr;
+ unsigned i, j, seg_idx = 0;
+
+ /* get pointer to global configuration */
+ mcfg = rte_eal_get_configuration()->mem_config;
+
+ /* for debug purposes, hugetlbfs can be disabled */
+ if (internal_config.no_hugetlbfs) {
+ addr = malloc(internal_config.memory);
+ mcfg->memseg[0].phys_addr = (phys_addr_t)(uintptr_t)addr;
+ mcfg->memseg[0].addr = addr;
+ mcfg->memseg[0].hugepage_sz = RTE_PGSIZE_4K;
+ mcfg->memseg[0].len = internal_config.memory;
+ mcfg->memseg[0].socket_id = 0;
+ return 0;
+ }
+
+ /* map all hugepages and sort them */
+ for (i = 0; i < internal_config.num_hugepage_sizes; i ++){
+ struct hugepage_info *hpi;
+
+ hpi = &internal_config.hugepage_info[i];
+ for (j = 0; j < hpi->num_pages[0]; j++) {
+ struct rte_memseg *seg;
+ uint64_t physaddr;
+ int error;
+ size_t sysctl_size = sizeof(physaddr);
+ char physaddr_str[64];
+
+ addr = mmap(NULL, hpi->hugepage_sz, PROT_READ|PROT_WRITE,
+ MAP_SHARED, hpi->lock_descriptor,
+ j * EAL_PAGE_SIZE);
+ if (addr == MAP_FAILED) {
+ RTE_LOG(ERR, EAL, "Failed to mmap buffer %u from %s\n",
+ j, hpi->hugedir);
+ return -1;
+ }
+
+ snprintf(physaddr_str, sizeof(physaddr_str), "hw.contigmem"
+ ".physaddr.%d", j);
+ error = sysctlbyname(physaddr_str, &physaddr, &sysctl_size,
+ NULL, 0);
+ if (error < 0) {
+ RTE_LOG(ERR, EAL, "Failed to get physical addr for buffer %u "
+ "from %s\n", j, hpi->hugedir);
+ return -1;
+ }
+
+ seg = &mcfg->memseg[seg_idx++];
+ seg->addr = addr;
+ seg->phys_addr = physaddr;
+ seg->hugepage_sz = hpi->hugepage_sz;
+ seg->len = hpi->hugepage_sz;
+ seg->nchannel = mcfg->nchannel;
+ seg->nrank = mcfg->nrank;
+ seg->socket_id = 0;
+
+ RTE_LOG(INFO, EAL, "Mapped memory segment %u @ %p: physaddr:0x%"
+ PRIx64", len %zu\n",
+ seg_idx, addr, physaddr, hpi->hugepage_sz);
+ if (total_mem >= internal_config.memory ||
+ seg_idx >= RTE_MAX_MEMSEG)
+ break;
+ }
+ }
+ return 0;
+}
+
+int
+rte_eal_hugepage_attach(void)
+{
+ const struct hugepage_info *hpi;
+ int fd_hugepage_info, fd_hugepage = -1;
+ unsigned i = 0;
+ struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
+
+ /* Obtain a file descriptor for hugepage_info */
+ fd_hugepage_info = open(eal_hugepage_info_path(), O_RDONLY);
+ if (fd_hugepage_info < 0) {
+ RTE_LOG(ERR, EAL, "Could not open %s\n", eal_hugepage_info_path());
+ return -1;
+ }
+
+ /* Map the shared hugepage_info into the process address spaces */
+ hpi = mmap(NULL, sizeof(struct hugepage_info), PROT_READ, MAP_PRIVATE,
+ fd_hugepage_info, 0);
+ if (hpi == NULL) {
+ RTE_LOG(ERR, EAL, "Could not mmap %s\n", eal_hugepage_info_path());
+ goto error;
+ }
+
+ /* Obtain a file descriptor for contiguous memory */
+ fd_hugepage = open(hpi->hugedir, O_RDWR);
+ if (fd_hugepage < 0) {
+ RTE_LOG(ERR, EAL, "Could not open %s\n", hpi->hugedir);
+ goto error;
+ }
+
+ /* Map the contiguous memory into each memory segment */
+ for (i = 0; i < hpi->num_pages[0]; i++) {
+
+ void *addr;
+ struct rte_memseg *seg = &mcfg->memseg[i];
+
+ addr = mmap(seg->addr, hpi->hugepage_sz, PROT_READ|PROT_WRITE,
+ MAP_SHARED|MAP_FIXED, fd_hugepage,
+ i * EAL_PAGE_SIZE);
+ if (addr == MAP_FAILED || addr != seg->addr) {
+ RTE_LOG(ERR, EAL, "Failed to mmap buffer %u from %s\n",
+ i, hpi->hugedir);
+ goto error;
+ }
+
+ }
+
+ /* hugepage_info is no longer required */
+ munmap((void *)(uintptr_t)hpi, sizeof(struct hugepage_info));
+ close(fd_hugepage_info);
+ close(fd_hugepage);
+ return 0;
+
+error:
+ if (fd_hugepage_info >= 0)
+ close(fd_hugepage_info);
+ if (fd_hugepage >= 0)
+ close(fd_hugepage);
+ return -1;
+}
Code Review / deb_dpdk.git / blobdiff