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/*-
* 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 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;
}
static int
rte_eal_contigmem_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].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 * 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;
}
static int
rte_eal_contigmem_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 * 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;
}
static int
rte_eal_memdevice_init(void)
{
struct rte_config *config;
if (rte_eal_process_type() == RTE_PROC_SECONDARY)
return 0;
config = rte_eal_get_configuration();
config->mem_config->nchannel = internal_config.force_nchannel;
config->mem_config->nrank = internal_config.force_nrank;
return 0;
}
/* init memory subsystem */
int
rte_eal_memory_init(void)
{
RTE_LOG(INFO, EAL, "Setting up physically contiguous memory...\n");
const int retval = rte_eal_process_type() == RTE_PROC_PRIMARY ?
rte_eal_contigmem_init() :
rte_eal_contigmem_attach();
if (retval < 0)
return -1;
if (internal_config.no_shconf == 0 && rte_eal_memdevice_init() < 0)
return -1;
return 0;
}
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