+++ /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 <errno.h>
-#include <stdarg.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <stdint.h>
-#include <inttypes.h>
-#include <string.h>
-#include <sys/mman.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/queue.h>
-#include <sys/file.h>
-#include <unistd.h>
-#include <limits.h>
-#include <sys/ioctl.h>
-#include <sys/time.h>
-
-#include <rte_log.h>
-#include <rte_memory.h>
-#include <rte_memzone.h>
-#include <rte_launch.h>
-#include <rte_eal.h>
-#include <rte_eal_memconfig.h>
-#include <rte_per_lcore.h>
-#include <rte_lcore.h>
-#include <rte_common.h>
-#include <rte_string_fns.h>
-
-#include "eal_private.h"
-#include "eal_internal_cfg.h"
-#include "eal_filesystem.h"
-#include <exec-env/rte_dom0_common.h>
-
-#define PAGE_SIZE RTE_PGSIZE_4K
-#define DEFAUL_DOM0_NAME "dom0-mem"
-
-static int xen_fd = -1;
-static const char sys_dir_path[] = "/sys/kernel/mm/dom0-mm/memsize-mB";
-
-/*
- * Try to mmap *size bytes in /dev/zero. If it is successful, return the
- * pointer to the mmap'd area and keep *size unmodified. Else, retry
- * with a smaller zone: decrease *size by mem_size until it reaches
- * 0. In this case, return NULL. Note: this function returns an address
- * which is a multiple of mem_size size.
- */
-static void *
-xen_get_virtual_area(size_t *size, size_t mem_size)
-{
- void *addr;
- int fd;
- long aligned_addr;
-
- RTE_LOG(DEBUG, EAL, "Ask a virtual area of 0x%zu bytes\n", *size);
-
- fd = open("/dev/zero", O_RDONLY);
- if (fd < 0){
- RTE_LOG(ERR, EAL, "Cannot open /dev/zero\n");
- return NULL;
- }
- do {
- addr = mmap(NULL, (*size) + mem_size, PROT_READ,
- MAP_PRIVATE, fd, 0);
- if (addr == MAP_FAILED)
- *size -= mem_size;
- } while (addr == MAP_FAILED && *size > 0);
-
- if (addr == MAP_FAILED) {
- close(fd);
- RTE_LOG(ERR, EAL, "Cannot get a virtual area\n");
- return NULL;
- }
-
- munmap(addr, (*size) + mem_size);
- close(fd);
-
- /* align addr to a mem_size boundary */
- aligned_addr = (uintptr_t)addr;
- aligned_addr = RTE_ALIGN_CEIL(aligned_addr, mem_size);
- addr = (void *)(aligned_addr);
-
- RTE_LOG(DEBUG, EAL, "Virtual area found at %p (size = 0x%zx)\n",
- addr, *size);
-
- return addr;
-}
-
-/**
- * Get memory size configuration from /sys/devices/virtual/misc/dom0_mm
- * /memsize-mB/memsize file, and the size unit is mB.
- */
-static int
-get_xen_memory_size(void)
-{
- char path[PATH_MAX];
- unsigned long mem_size = 0;
- static const char *file_name;
-
- file_name = "memsize";
- snprintf(path, sizeof(path), "%s/%s",
- sys_dir_path, file_name);
-
- if (eal_parse_sysfs_value(path, &mem_size) < 0)
- return -1;
-
- if (mem_size == 0)
- rte_exit(EXIT_FAILURE,"XEN-DOM0:the %s/%s was not"
- " configured.\n",sys_dir_path, file_name);
- if (mem_size % 2)
- rte_exit(EXIT_FAILURE,"XEN-DOM0:the %s/%s must be"
- " even number.\n",sys_dir_path, file_name);
-
- if (mem_size > DOM0_CONFIG_MEMSIZE)
- rte_exit(EXIT_FAILURE,"XEN-DOM0:the %s/%s should not be larger"
- " than %d mB\n",sys_dir_path, file_name, DOM0_CONFIG_MEMSIZE);
-
- return mem_size;
-}
-
-/**
- * Based on physical address to caculate MFN in Xen Dom0.
- */
-phys_addr_t
-rte_xen_mem_phy2mch(int32_t memseg_id, const phys_addr_t phy_addr)
-{
- int mfn_id, i;
- uint64_t mfn, mfn_offset;
- struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
- struct rte_memseg *memseg = mcfg->memseg;
-
- /* find the memory segment owning the physical address */
- if (memseg_id == -1) {
- for (i = 0; i < RTE_MAX_MEMSEG; i++) {
- if ((phy_addr >= memseg[i].phys_addr) &&
- (phy_addr < memseg[i].phys_addr +
- memseg[i].len)) {
- memseg_id = i;
- break;
- }
- }
- if (memseg_id == -1)
- return RTE_BAD_PHYS_ADDR;
- }
-
- mfn_id = (phy_addr - memseg[memseg_id].phys_addr) / RTE_PGSIZE_2M;
-
- /*the MFN is contiguous in 2M */
- mfn_offset = (phy_addr - memseg[memseg_id].phys_addr) %
- RTE_PGSIZE_2M / PAGE_SIZE;
- mfn = mfn_offset + memseg[memseg_id].mfn[mfn_id];
-
- /** return mechine address */
- return mfn * PAGE_SIZE + phy_addr % PAGE_SIZE;
-}
-
-int
-rte_xen_dom0_memory_init(void)
-{
- void *vir_addr, *vma_addr = NULL;
- int err, ret = 0;
- uint32_t i, requested, mem_size, memseg_idx, num_memseg = 0;
- size_t vma_len = 0;
- struct memory_info meminfo;
- struct memseg_info seginfo[RTE_MAX_MEMSEG];
- int flags, page_size = getpagesize();
- struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
- struct rte_memseg *memseg = mcfg->memseg;
- uint64_t total_mem = internal_config.memory;
-
- memset(seginfo, 0, sizeof(seginfo));
- memset(&meminfo, 0, sizeof(struct memory_info));
-
- mem_size = get_xen_memory_size();
- requested = (unsigned) (total_mem / 0x100000);
- if (requested > mem_size)
- /* if we didn't satisfy total memory requirements */
- rte_exit(EXIT_FAILURE,"Not enough memory available! Requested: %uMB,"
- " available: %uMB\n", requested, mem_size);
- else if (total_mem != 0)
- mem_size = requested;
-
- /* Check FD and open once */
- if (xen_fd < 0) {
- xen_fd = open(DOM0_MM_DEV, O_RDWR);
- if (xen_fd < 0) {
- RTE_LOG(ERR, EAL, "Can not open %s\n",DOM0_MM_DEV);
- return -1;
- }
- }
-
- meminfo.size = mem_size;
-
- /* construct memory mangement name for Dom0 */
- snprintf(meminfo.name, DOM0_NAME_MAX, "%s-%s",
- internal_config.hugefile_prefix, DEFAUL_DOM0_NAME);
-
- /* Notify kernel driver to allocate memory */
- ret = ioctl(xen_fd, RTE_DOM0_IOCTL_PREPARE_MEMSEG, &meminfo);
- if (ret < 0) {
- RTE_LOG(ERR, EAL, "XEN DOM0:failed to get memory\n");
- err = -EIO;
- goto fail;
- }
-
- /* Get number of memory segment from driver */
- ret = ioctl(xen_fd, RTE_DOM0_IOCTL_GET_NUM_MEMSEG, &num_memseg);
- if (ret < 0) {
- RTE_LOG(ERR, EAL, "XEN DOM0:failed to get memseg count.\n");
- err = -EIO;
- goto fail;
- }
-
- if(num_memseg > RTE_MAX_MEMSEG){
- RTE_LOG(ERR, EAL, "XEN DOM0: the memseg count %d is greater"
- " than max memseg %d.\n",num_memseg, RTE_MAX_MEMSEG);
- err = -EIO;
- goto fail;
- }
-
- /* get all memory segements information */
- ret = ioctl(xen_fd, RTE_DOM0_IOCTL_GET_MEMSEG_INFO, seginfo);
- if (ret < 0) {
- RTE_LOG(ERR, EAL, "XEN DOM0:failed to get memseg info.\n");
- err = -EIO;
- goto fail;
- }
-
- /* map all memory segments to contiguous user space */
- for (memseg_idx = 0; memseg_idx < num_memseg; memseg_idx++)
- {
- vma_len = seginfo[memseg_idx].size;
-
- /**
- * get the biggest virtual memory area up to vma_len. If it fails,
- * vma_addr is NULL, so let the kernel provide the address.
- */
- vma_addr = xen_get_virtual_area(&vma_len, RTE_PGSIZE_2M);
- if (vma_addr == NULL) {
- flags = MAP_SHARED;
- vma_len = RTE_PGSIZE_2M;
- } else
- flags = MAP_SHARED | MAP_FIXED;
-
- seginfo[memseg_idx].size = vma_len;
- vir_addr = mmap(vma_addr, seginfo[memseg_idx].size,
- PROT_READ|PROT_WRITE, flags, xen_fd,
- memseg_idx * page_size);
- if (vir_addr == MAP_FAILED) {
- RTE_LOG(ERR, EAL, "XEN DOM0:Could not mmap %s\n",
- DOM0_MM_DEV);
- err = -EIO;
- goto fail;
- }
-
- memseg[memseg_idx].addr = vir_addr;
- memseg[memseg_idx].phys_addr = page_size *
- seginfo[memseg_idx].pfn ;
- memseg[memseg_idx].len = seginfo[memseg_idx].size;
- for ( i = 0; i < seginfo[memseg_idx].size / RTE_PGSIZE_2M; i++)
- memseg[memseg_idx].mfn[i] = seginfo[memseg_idx].mfn[i];
-
- /* MFNs are continuous in 2M, so assume that page size is 2M */
- memseg[memseg_idx].hugepage_sz = RTE_PGSIZE_2M;
-
- memseg[memseg_idx].nchannel = mcfg->nchannel;
- memseg[memseg_idx].nrank = mcfg->nrank;
-
- /* NUMA is not suppoted in Xen Dom0, so only set socket 0*/
- memseg[memseg_idx].socket_id = 0;
- }
-
- return 0;
-fail:
- if (xen_fd > 0) {
- close(xen_fd);
- xen_fd = -1;
- }
- return err;
-}
-
-/*
- * This creates the memory mappings in the secondary process to match that of
- * the server process. It goes through each memory segment in the DPDK runtime
- * configuration, mapping them in order to form a contiguous block in the
- * virtual memory space
- */
-int
-rte_xen_dom0_memory_attach(void)
-{
- const struct rte_mem_config *mcfg;
- unsigned s = 0; /* s used to track the segment number */
- int xen_fd = -1;
- int ret = -1;
- void *vir_addr;
- char name[DOM0_NAME_MAX] = {0};
- int page_size = getpagesize();
-
- mcfg = rte_eal_get_configuration()->mem_config;
-
- /* Check FD and open once */
- if (xen_fd < 0) {
- xen_fd = open(DOM0_MM_DEV, O_RDWR);
- if (xen_fd < 0) {
- RTE_LOG(ERR, EAL, "Can not open %s\n",DOM0_MM_DEV);
- goto error;
- }
- }
-
- /* construct memory mangement name for Dom0 */
- snprintf(name, DOM0_NAME_MAX, "%s-%s",
- internal_config.hugefile_prefix, DEFAUL_DOM0_NAME);
- /* attach to memory segments of primary process */
- ret = ioctl(xen_fd, RTE_DOM0_IOCTL_ATTACH_TO_MEMSEG, name);
- if (ret) {
- RTE_LOG(ERR, EAL,"attach memory segments fail.\n");
- goto error;
- }
-
- /* map all segments into memory to make sure we get the addrs */
- for (s = 0; s < RTE_MAX_MEMSEG; ++s) {
-
- /*
- * the first memory segment with len==0 is the one that
- * follows the last valid segment.
- */
- if (mcfg->memseg[s].len == 0)
- break;
-
- vir_addr = mmap(mcfg->memseg[s].addr, mcfg->memseg[s].len,
- PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, xen_fd,
- s * page_size);
- if (vir_addr == MAP_FAILED) {
- RTE_LOG(ERR, EAL, "Could not mmap %llu bytes "
- "in %s to requested address [%p]\n",
- (unsigned long long)mcfg->memseg[s].len, DOM0_MM_DEV,
- mcfg->memseg[s].addr);
- goto error;
- }
- }
- return 0;
-
-error:
- if (xen_fd >= 0) {
- close(xen_fd);
- xen_fd = -1;
- }
- return -1;
-}
Code Review / deb_dpdk.git / blobdiff