diff options
Diffstat (limited to 'lib/librte_eal/linuxapp/eal/eal_xen_memory.c')
-rw-r--r-- | lib/librte_eal/linuxapp/eal/eal_xen_memory.c | 381 |
1 files changed, 0 insertions, 381 deletions
diff --git a/lib/librte_eal/linuxapp/eal/eal_xen_memory.c b/lib/librte_eal/linuxapp/eal/eal_xen_memory.c deleted file mode 100644 index 19db1cb5..00000000 --- a/lib/librte_eal/linuxapp/eal/eal_xen_memory.c +++ /dev/null @@ -1,381 +0,0 @@ -/*- - * 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; -} |