Imported Upstream version 16.04

[deb_dpdk.git] / lib / librte_eal / bsdapp / eal / eal_hugepage_info.c

diff --git a/lib/librte_eal/bsdapp/eal/eal_hugepage_info.c b/lib/librte_eal/bsdapp/eal/eal_hugepage_info.c
new file mode 100644 (file)
index 0000000..8a33c30
--- /dev/null
+++ b/lib/librte_eal/bsdapp/eal/eal_hugepage_info.c
@@ -0,0 +1,134 @@
+/*-
+ *   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/sysctl.h>
+#include <sys/mman.h>
+#include <string.h>
+
+#include <rte_log.h>
+#include <fcntl.h>
+#include "eal_hugepages.h"
+#include "eal_internal_cfg.h"
+#include "eal_filesystem.h"
+
+#define CONTIGMEM_DEV "/dev/contigmem"
+
+/*
+ * Uses mmap to create a shared memory area for storage of data
+ * Used in this file to store the hugepage file map on disk
+ */
+static void *
+create_shared_memory(const char *filename, const size_t mem_size)
+{
+       void *retval;
+       int fd = open(filename, O_CREAT | O_RDWR, 0666);
+       if (fd < 0)
+               return NULL;
+       if (ftruncate(fd, mem_size) < 0) {
+               close(fd);
+               return NULL;
+       }
+       retval = mmap(NULL, mem_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+       close(fd);
+       return retval;
+}
+
+/*
+ * No hugepage support on freebsd, but we dummy it, using contigmem driver
+ */
+int
+eal_hugepage_info_init(void)
+{
+       size_t sysctl_size;
+       int num_buffers, fd, error;
+       int64_t buffer_size;
+       /* re-use the linux "internal config" structure for our memory data */
+       struct hugepage_info *hpi = &internal_config.hugepage_info[0];
+       struct hugepage_info *tmp_hpi;
+
+       sysctl_size = sizeof(num_buffers);
+       error = sysctlbyname("hw.contigmem.num_buffers", &num_buffers,
+                       &sysctl_size, NULL, 0);
+
+       if (error != 0) {
+               RTE_LOG(ERR, EAL, "could not read sysctl hw.contigmem.num_buffers");
+               return -1;
+       }
+
+       sysctl_size = sizeof(buffer_size);
+       error = sysctlbyname("hw.contigmem.buffer_size", &buffer_size,
+                       &sysctl_size, NULL, 0);
+
+       if (error != 0) {
+               RTE_LOG(ERR, EAL, "could not read sysctl hw.contigmem.buffer_size");
+               return -1;
+       }
+
+       fd = open(CONTIGMEM_DEV, O_RDWR);
+       if (fd < 0) {
+               RTE_LOG(ERR, EAL, "could not open "CONTIGMEM_DEV"\n");
+               return -1;
+       }
+
+       if (buffer_size >= 1<<30)
+               RTE_LOG(INFO, EAL, "Contigmem driver has %d buffers, each of size %dGB\n",
+                               num_buffers, (int)(buffer_size>>30));
+       else if (buffer_size >= 1<<20)
+               RTE_LOG(INFO, EAL, "Contigmem driver has %d buffers, each of size %dMB\n",
+                               num_buffers, (int)(buffer_size>>20));
+       else
+               RTE_LOG(INFO, EAL, "Contigmem driver has %d buffers, each of size %dKB\n",
+                               num_buffers, (int)(buffer_size>>10));
+
+       internal_config.num_hugepage_sizes = 1;
+       hpi->hugedir = CONTIGMEM_DEV;
+       hpi->hugepage_sz = buffer_size;
+       hpi->num_pages[0] = num_buffers;
+       hpi->lock_descriptor = fd;
+
+       tmp_hpi = create_shared_memory(eal_hugepage_info_path(),
+                                       sizeof(struct hugepage_info));
+       if (tmp_hpi == NULL ) {
+               RTE_LOG(ERR, EAL, "Failed to create shared memory!\n");
+               return -1;
+       }
+
+       memcpy(tmp_hpi, hpi, sizeof(struct hugepage_info));
+
+       if ( munmap(tmp_hpi, sizeof(struct hugepage_info)) < 0) {
+               RTE_LOG(ERR, EAL, "Failed to unmap shared memory!\n");
+               return -1;
+       }
+
+       return 0;
+}