+++ /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/types.h>
-#include <sys/stat.h>
-#include "mempool_osdep.h"
-#include <rte_errno.h>
-
-#ifdef RTE_EXEC_ENV_LINUXAPP
-
-#include <fcntl.h>
-#include <unistd.h>
-#include <sys/mman.h>
-
-
-#define PAGEMAP_FNAME "/proc/self/pagemap"
-
-/*
- * the pfn (page frame number) are bits 0-54 (see pagemap.txt in linux
- * Documentation).
- */
-#define PAGEMAP_PFN_BITS 54
-#define PAGEMAP_PFN_MASK RTE_LEN2MASK(PAGEMAP_PFN_BITS, phys_addr_t)
-
-
-static int
-get_phys_map(void *va, phys_addr_t pa[], uint32_t pg_num, uint32_t pg_sz)
-{
- int32_t fd, rc;
- uint32_t i, nb;
- off_t ofs;
-
- ofs = (uintptr_t)va / pg_sz * sizeof(*pa);
- nb = pg_num * sizeof(*pa);
-
- if ((fd = open(PAGEMAP_FNAME, O_RDONLY)) < 0)
- return ENOENT;
-
- if ((rc = pread(fd, pa, nb, ofs)) < 0 || (rc -= nb) != 0) {
-
- RTE_LOG(ERR, USER1, "failed read of %u bytes from \'%s\' "
- "at offset %zu, error code: %d\n",
- nb, PAGEMAP_FNAME, (size_t)ofs, errno);
- rc = ENOENT;
- }
-
- close(fd);
-
- for (i = 0; i != pg_num; i++)
- pa[i] = (pa[i] & PAGEMAP_PFN_MASK) * pg_sz;
-
- return rc;
-}
-
-struct rte_mempool *
-mempool_anon_create(const char *name, unsigned elt_num, unsigned elt_size,
- unsigned cache_size, unsigned private_data_size,
- rte_mempool_ctor_t *mp_init, void *mp_init_arg,
- rte_mempool_obj_ctor_t *obj_init, void *obj_init_arg,
- int socket_id, unsigned flags)
-{
- struct rte_mempool *mp;
- phys_addr_t *pa;
- char *va, *uv;
- uint32_t n, pg_num, pg_shift, pg_sz, total_size;
- size_t sz;
- ssize_t usz;
- int32_t rc;
-
- rc = ENOMEM;
- mp = NULL;
-
- pg_sz = getpagesize();
- if (rte_is_power_of_2(pg_sz) == 0) {
- rte_errno = EINVAL;
- return mp;
- }
-
- pg_shift = rte_bsf32(pg_sz);
-
- total_size = rte_mempool_calc_obj_size(elt_size, flags, NULL);
-
- /* calc max memory size and max number of pages needed. */
- sz = rte_mempool_xmem_size(elt_num, total_size, pg_shift);
- pg_num = sz >> pg_shift;
-
- /* get chunk of virtually continuos memory.*/
- if ((va = mmap(NULL, sz, PROT_READ | PROT_WRITE,
- MAP_SHARED | MAP_ANONYMOUS | MAP_LOCKED,
- -1, 0)) == MAP_FAILED) {
- RTE_LOG(ERR, USER1, "%s(%s) failed mmap of %zu bytes, "
- "error code: %d\n",
- __func__, name, sz, errno);
- rte_errno = rc;
- return mp;
- }
-
- /* extract physical mappings of the allocated memory. */
- if ((pa = calloc(pg_num, sizeof (*pa))) != NULL &&
- (rc = get_phys_map(va, pa, pg_num, pg_sz)) == 0) {
-
- /*
- * Check that allocated size is big enough to hold elt_num
- * objects and a calcualte how many bytes are actually required.
- */
-
- if ((usz = rte_mempool_xmem_usage(va, elt_num, total_size, pa,
- pg_num, pg_shift)) < 0) {
-
- n = -usz;
- rc = ENOENT;
- RTE_LOG(ERR, USER1, "%s(%s) only %u objects from %u "
- "requested can be created over "
- "mmaped region %p of %zu bytes\n",
- __func__, name, n, elt_num, va, sz);
- } else {
-
- /* unmap unused pages if any */
- if ((size_t)usz < sz) {
-
- uv = va + usz;
- usz = sz - usz;
-
- RTE_LOG(INFO, USER1,
- "%s(%s): unmap unused %zu of %zu "
- "mmaped bytes @%p\n",
- __func__, name, (size_t)usz, sz, uv);
- munmap(uv, usz);
- sz -= usz;
- pg_num = sz >> pg_shift;
- }
-
- if ((mp = rte_mempool_xmem_create(name, elt_num,
- elt_size, cache_size, private_data_size,
- mp_init, mp_init_arg,
- obj_init, obj_init_arg,
- socket_id, flags, va, pa, pg_num,
- pg_shift)) != NULL)
-
- RTE_VERIFY(elt_num == mp->size);
- }
- }
-
- if (mp == NULL) {
- munmap(va, sz);
- rte_errno = rc;
- }
-
- free(pa);
- return mp;
-}
-
-#else /* RTE_EXEC_ENV_LINUXAPP */
-
-
-struct rte_mempool *
-mempool_anon_create(__rte_unused const char *name,
- __rte_unused unsigned elt_num, __rte_unused unsigned elt_size,
- __rte_unused unsigned cache_size,
- __rte_unused unsigned private_data_size,
- __rte_unused rte_mempool_ctor_t *mp_init,
- __rte_unused void *mp_init_arg,
- __rte_unused rte_mempool_obj_ctor_t *obj_init,
- __rte_unused void *obj_init_arg,
- __rte_unused int socket_id, __rte_unused unsigned flags)
-{
- rte_errno = ENOTSUP;
- return NULL;
-}
-
-#endif /* RTE_EXEC_ENV_LINUXAPP */
Code Review / deb_dpdk.git / blobdiff