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/*
* Copyright 2014-2019, Intel Corporation
*
* 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 the copyright holder 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 <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <inttypes.h>
#include <dirent.h>
#include <ofi_osd.h>
#include <ofi.h>
#include <rdma/fi_errno.h>
#include <ofi_mem.h>
#include <rdma/fabric.h>
static const int OFI_CACHE_SIZE = 64;
size_t *page_sizes = NULL;
size_t num_page_sizes = 0;
void ofi_mem_init(void)
{
struct dirent **pglist = NULL;
size_t max_cnt;
ssize_t hpsize;
long psize;
int n;
psize = ofi_get_page_size();
if (psize < 0)
return;
hpsize = ofi_get_hugepage_size();
if (hpsize > 0) {
n = scandir("/sys/kernel/mm/hugepages", &pglist, NULL, NULL);
max_cnt = (n < 0) ? 2 : n + 1;
} else {
max_cnt = 1;
n = 0;
}
page_sizes = calloc(max_cnt, sizeof(*page_sizes));
if (!page_sizes)
goto free_list;
page_sizes[OFI_PAGE_SIZE] = psize;
if (hpsize > 0) {
page_sizes[OFI_DEF_HUGEPAGE_SIZE] = hpsize;
num_page_sizes = 2;
} else {
num_page_sizes = 1;
}
while (n-- > 0) {
if (sscanf(pglist[n]->d_name, "hugepages-%zikB", &hpsize) == 1) {
hpsize *= 1024;
if ((size_t) hpsize != page_sizes[OFI_DEF_HUGEPAGE_SIZE])
page_sizes[num_page_sizes++] = hpsize;
}
free(pglist[n]);
}
free_list:
while (n-- > 0)
free(pglist[n]);
free(pglist);
}
void ofi_mem_fini(void)
{
free(page_sizes);
}
size_t ofi_get_mem_size(void)
{
long page_cnt, page_size;
size_t mem_size;
page_cnt = ofi_sysconf(_SC_PHYS_PAGES);
page_size = ofi_get_page_size();
if (page_cnt <= 0 || page_size <= 0)
return 0;
mem_size = (size_t) page_cnt * (size_t) page_size;
if (mem_size < page_cnt || mem_size < page_size)
return 0;
return mem_size;
}
uint64_t OFI_RMA_PMEM;
void (*ofi_pmem_commit)(const void *addr, size_t len);
static void pmem_commit_clwb(const void *addr, size_t len)
{
uintptr_t uptr;
for (uptr = (uintptr_t) addr & ~(OFI_CACHE_SIZE - 1);
uptr < (uintptr_t) addr + len; uptr += OFI_CACHE_SIZE) {
ofi_clwb(uptr);
}
ofi_sfence();
}
static void pmem_commit_clflushopt(const void *addr, size_t len)
{
uintptr_t uptr;
for (uptr = (uintptr_t) addr & ~(OFI_CACHE_SIZE - 1);
uptr < (uintptr_t) addr + len; uptr += OFI_CACHE_SIZE) {
ofi_clflushopt(uptr);
}
ofi_sfence();
}
static void pmem_commit_clflush(const void *addr, size_t len)
{
uintptr_t uptr;
for (uptr = (uintptr_t) addr & ~(OFI_CACHE_SIZE - 1);
uptr < (uintptr_t) addr + len; uptr += OFI_CACHE_SIZE) {
ofi_clflush(uptr);
}
}
void ofi_pmem_init(void)
{
if (ofi_cpu_supports(0x7, OFI_CLWB_REG, OFI_CLWB_BIT)) {
ofi_pmem_commit = pmem_commit_clwb;
} else if (ofi_cpu_supports(0x7, OFI_CLFLUSHOPT_REG,
OFI_CLFLUSHOPT_BIT)) {
ofi_pmem_commit = pmem_commit_clflushopt;
} else if (ofi_cpu_supports(0x1, OFI_CLFLUSH_REG, OFI_CLFLUSH_BIT)) {
ofi_pmem_commit = pmem_commit_clflush;
}
if (ofi_pmem_commit)
OFI_RMA_PMEM = FI_RMA_PMEM;
}
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