diff options
Diffstat (limited to 'src/dpdk_lib18/librte_eal/linuxapp/xen_dom0/dom0_mm_misc.c')
| -rwxr-xr-x | src/dpdk_lib18/librte_eal/linuxapp/xen_dom0/dom0_mm_misc.c | 781 |
1 files changed, 0 insertions, 781 deletions
diff --git a/src/dpdk_lib18/librte_eal/linuxapp/xen_dom0/dom0_mm_misc.c b/src/dpdk_lib18/librte_eal/linuxapp/xen_dom0/dom0_mm_misc.c deleted file mode 100755 index 543bf574..00000000 --- a/src/dpdk_lib18/librte_eal/linuxapp/xen_dom0/dom0_mm_misc.c +++ /dev/null @@ -1,781 +0,0 @@ -/*- - * This file is provided under a dual BSD/GPLv2 license. When using or - * redistributing this file, you may do so under either license. - * - * GPL LICENSE SUMMARY - * - * Copyright(c) 2010-2014 Intel Corporation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of version 2 of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. - * The full GNU General Public License is included in this distribution - * in the file called LICENSE.GPL. - * - * Contact Information: - * Intel Corporation - * - * 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 <linux/module.h> -#include <linux/miscdevice.h> -#include <linux/fs.h> -#include <linux/device.h> -#include <linux/errno.h> -#include <linux/vmalloc.h> -#include <linux/mm.h> -#include <linux/version.h> - -#include <xen/xen.h> -#include <xen/page.h> -#include <xen/xen-ops.h> -#include <xen/interface/memory.h> - -#include <rte_config.h> -#include <exec-env/rte_dom0_common.h> - -#include "compat.h" -#include "dom0_mm_dev.h" - -MODULE_LICENSE("Dual BSD/GPL"); -MODULE_AUTHOR("Intel Corporation"); -MODULE_DESCRIPTION("Kernel Module for supporting DPDK running on Xen Dom0"); - -static struct dom0_mm_dev dom0_dev; -static struct kobject *dom0_kobj = NULL; - -static struct memblock_info *rsv_mm_info; - -/* Default configuration for reserved memory size(2048 MB). */ -static uint32_t rsv_memsize = 2048; - -static int dom0_open(struct inode *inode, struct file *file); -static int dom0_release(struct inode *inode, struct file *file); -static int dom0_ioctl(struct file *file, unsigned int ioctl_num, - unsigned long ioctl_param); -static int dom0_mmap(struct file *file, struct vm_area_struct *vma); -static int dom0_memory_free(uint32_t size); -static int dom0_memory_release(struct dom0_mm_data *mm_data); - -static const struct file_operations data_fops = { - .owner = THIS_MODULE, - .open = dom0_open, - .release = dom0_release, - .mmap = dom0_mmap, - .unlocked_ioctl = (void *)dom0_ioctl, -}; - -static ssize_t -show_memsize_rsvd(struct device *dev, struct device_attribute *attr, char *buf) -{ - return snprintf(buf, 10, "%u\n", dom0_dev.used_memsize); -} - -static ssize_t -show_memsize(struct device *dev, struct device_attribute *attr, char *buf) -{ - return snprintf(buf, 10, "%u\n", dom0_dev.config_memsize); -} - -static ssize_t -store_memsize(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) -{ - int err = 0; - unsigned long mem_size; - - if (0 != kstrtoul(buf, 0, &mem_size)) - return -EINVAL; - - mutex_lock(&dom0_dev.data_lock); - if (0 == mem_size) { - err = -EINVAL; - goto fail; - } else if (mem_size > (rsv_memsize - dom0_dev.used_memsize)) { - XEN_ERR("configure memory size fail\n"); - err = -EINVAL; - goto fail; - } else - dom0_dev.config_memsize = mem_size; - -fail: - mutex_unlock(&dom0_dev.data_lock); - return err ? err : count; -} - -static DEVICE_ATTR(memsize, S_IRUGO | S_IWUSR, show_memsize, store_memsize); -static DEVICE_ATTR(memsize_rsvd, S_IRUGO, show_memsize_rsvd, NULL); - -static struct attribute *dev_attrs[] = { - &dev_attr_memsize.attr, - &dev_attr_memsize_rsvd.attr, - NULL, -}; - -/* the memory size unit is MB */ -static const struct attribute_group dev_attr_grp = { - .name = "memsize-mB", - .attrs = dev_attrs, -}; - - -static void -sort_viraddr(struct memblock_info *mb, int cnt) -{ - int i,j; - uint64_t tmp_pfn; - uint64_t tmp_viraddr; - - /*sort virtual address and pfn */ - for(i = 0; i < cnt; i ++) { - for(j = cnt - 1; j > i; j--) { - if(mb[j].pfn < mb[j - 1].pfn) { - tmp_pfn = mb[j - 1].pfn; - mb[j - 1].pfn = mb[j].pfn; - mb[j].pfn = tmp_pfn; - - tmp_viraddr = mb[j - 1].vir_addr; - mb[j - 1].vir_addr = mb[j].vir_addr; - mb[j].vir_addr = tmp_viraddr; - } - } - } -} - -static int -dom0_find_memdata(const char * mem_name) -{ - unsigned i; - int idx = -1; - for(i = 0; i< NUM_MEM_CTX; i++) { - if(dom0_dev.mm_data[i] == NULL) - continue; - if (!strncmp(dom0_dev.mm_data[i]->name, mem_name, - sizeof(char) * DOM0_NAME_MAX)) { - idx = i; - break; - } - } - - return idx; -} - -static int -dom0_find_mempos(void) -{ - unsigned i; - int idx = -1; - - for(i = 0; i< NUM_MEM_CTX; i++) { - if(dom0_dev.mm_data[i] == NULL){ - idx = i; - break; - } - } - - return idx; -} - -static int -dom0_memory_release(struct dom0_mm_data *mm_data) -{ - int idx; - uint32_t num_block, block_id; - - /* each memory block is 2M */ - num_block = mm_data->mem_size / SIZE_PER_BLOCK; - if (num_block == 0) - return -EINVAL; - - /* reset global memory data */ - idx = dom0_find_memdata(mm_data->name); - if (idx >= 0) { - dom0_dev.used_memsize -= mm_data->mem_size; - dom0_dev.mm_data[idx] = NULL; - dom0_dev.num_mem_ctx--; - } - - /* reset these memory blocks status as free */ - for (idx = 0; idx < num_block; idx++) { - block_id = mm_data->block_num[idx]; - rsv_mm_info[block_id].used = 0; - } - - memset(mm_data, 0, sizeof(struct dom0_mm_data)); - vfree(mm_data); - return 0; -} - -static int -dom0_memory_free(uint32_t rsv_size) -{ - uint64_t vstart, vaddr; - uint32_t i, num_block, size; - - if (!xen_pv_domain()) - return -1; - - /* each memory block is 2M */ - num_block = rsv_size / SIZE_PER_BLOCK; - if (num_block == 0) - return -EINVAL; - - /* free all memory blocks of size of 4M and destroy contiguous region */ - for (i = 0; i < dom0_dev.num_bigblock * 2; i += 2) { - vstart = rsv_mm_info[i].vir_addr; - if (vstart) { - #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 13, 0) - if (rsv_mm_info[i].exchange_flag) - xen_destroy_contiguous_region(vstart, - DOM0_CONTIG_NUM_ORDER); - if (rsv_mm_info[i + 1].exchange_flag) - xen_destroy_contiguous_region(vstart + - DOM0_MEMBLOCK_SIZE, - DOM0_CONTIG_NUM_ORDER); - #else - if (rsv_mm_info[i].exchange_flag) - xen_destroy_contiguous_region(rsv_mm_info[i].pfn - * PAGE_SIZE, - DOM0_CONTIG_NUM_ORDER); - if (rsv_mm_info[i + 1].exchange_flag) - xen_destroy_contiguous_region(rsv_mm_info[i].pfn - * PAGE_SIZE + DOM0_MEMBLOCK_SIZE, - DOM0_CONTIG_NUM_ORDER); - #endif - - size = DOM0_MEMBLOCK_SIZE * 2; - vaddr = vstart; - while (size > 0) { - ClearPageReserved(virt_to_page(vaddr)); - vaddr += PAGE_SIZE; - size -= PAGE_SIZE; - } - free_pages(vstart, MAX_NUM_ORDER); - } - } - - /* free all memory blocks size of 2M and destroy contiguous region */ - for (; i < num_block; i++) { - vstart = rsv_mm_info[i].vir_addr; - if (vstart) { - if (rsv_mm_info[i].exchange_flag) - xen_destroy_contiguous_region(vstart, - DOM0_CONTIG_NUM_ORDER); - - size = DOM0_MEMBLOCK_SIZE; - vaddr = vstart; - while (size > 0) { - ClearPageReserved(virt_to_page(vaddr)); - vaddr += PAGE_SIZE; - size -= PAGE_SIZE; - } - free_pages(vstart, DOM0_CONTIG_NUM_ORDER); - } - } - - memset(rsv_mm_info, 0, sizeof(struct memblock_info) * num_block); - vfree(rsv_mm_info); - rsv_mm_info = NULL; - - return 0; -} - -static void -find_free_memory(uint32_t count, struct dom0_mm_data *mm_data) -{ - uint32_t i = 0; - uint32_t j = 0; - - while ((i < count) && (j < rsv_memsize / SIZE_PER_BLOCK)) { - if (rsv_mm_info[j].used == 0) { - mm_data->block_info[i].pfn = rsv_mm_info[j].pfn; - mm_data->block_info[i].vir_addr = - rsv_mm_info[j].vir_addr; - mm_data->block_info[i].mfn = rsv_mm_info[j].mfn; - mm_data->block_info[i].exchange_flag = - rsv_mm_info[j].exchange_flag; - mm_data->block_num[i] = j; - rsv_mm_info[j].used = 1; - i++; - } - j++; - } -} - -/** - * Find all memory segments in which physical addresses are contiguous. - */ -static void -find_memseg(int count, struct dom0_mm_data * mm_data) -{ - int i = 0; - int j, k, idx = 0; - uint64_t zone_len, pfn, num_block; - - while(i < count) { - if (mm_data->block_info[i].exchange_flag == 0) { - i++; - continue; - } - k = 0; - pfn = mm_data->block_info[i].pfn; - mm_data->seg_info[idx].pfn = pfn; - mm_data->seg_info[idx].mfn[k] = mm_data->block_info[i].mfn; - - for (j = i + 1; j < count; j++) { - - /* ignore exchange fail memory block */ - if (mm_data->block_info[j].exchange_flag == 0) - break; - - if (mm_data->block_info[j].pfn != - (mm_data->block_info[j - 1].pfn + - DOM0_MEMBLOCK_SIZE / PAGE_SIZE)) - break; - ++k; - mm_data->seg_info[idx].mfn[k] = mm_data->block_info[j].mfn; - } - - num_block = j - i; - zone_len = num_block * DOM0_MEMBLOCK_SIZE; - mm_data->seg_info[idx].size = zone_len; - - XEN_PRINT("memseg id=%d, size=0x%llx\n", idx, zone_len); - i = i+ num_block; - idx++; - if (idx == DOM0_NUM_MEMSEG) - break; - } - mm_data->num_memseg = idx; -} - -static int -dom0_memory_reserve(uint32_t rsv_size) -{ - uint64_t pfn, vstart, vaddr; - uint32_t i, num_block, size, allocated_size = 0; - -#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 13, 0) - dma_addr_t dma_handle; -#endif - - /* 2M as memory block */ - num_block = rsv_size / SIZE_PER_BLOCK; - - rsv_mm_info = vmalloc(sizeof(struct memblock_info) * num_block); - if (!rsv_mm_info) { - XEN_ERR("Unable to allocate device memory information\n"); - return -ENOMEM; - } - memset(rsv_mm_info, 0, sizeof(struct memblock_info) * num_block); - - /* try alloc size of 4M once */ - for (i = 0; i < num_block; i += 2) { - vstart = (unsigned long) - __get_free_pages(GFP_ATOMIC, MAX_NUM_ORDER); - if (vstart == 0) - break; - - dom0_dev.num_bigblock = i / 2 + 1; - allocated_size = SIZE_PER_BLOCK * (i + 2); - - /* size of 4M */ - size = DOM0_MEMBLOCK_SIZE * 2; - - vaddr = vstart; - while (size > 0) { - SetPageReserved(virt_to_page(vaddr)); - vaddr += PAGE_SIZE; - size -= PAGE_SIZE; - } - - pfn = virt_to_pfn(vstart); - rsv_mm_info[i].pfn = pfn; - rsv_mm_info[i].vir_addr = vstart; - rsv_mm_info[i + 1].pfn = - pfn + DOM0_MEMBLOCK_SIZE / PAGE_SIZE; - rsv_mm_info[i + 1].vir_addr = - vstart + DOM0_MEMBLOCK_SIZE; - } - - /*if it failed to alloc 4M, and continue to alloc 2M once */ - for (; i < num_block; i++) { - vstart = (unsigned long) - __get_free_pages(GFP_ATOMIC, DOM0_CONTIG_NUM_ORDER); - if (vstart == 0) { - XEN_ERR("allocate memory fail.\n"); - dom0_memory_free(allocated_size); - return -ENOMEM; - } - - allocated_size += SIZE_PER_BLOCK; - - size = DOM0_MEMBLOCK_SIZE; - vaddr = vstart; - while (size > 0) { - SetPageReserved(virt_to_page(vaddr)); - vaddr += PAGE_SIZE; - size -= PAGE_SIZE; - } - pfn = virt_to_pfn(vstart); - rsv_mm_info[i].pfn = pfn; - rsv_mm_info[i].vir_addr = vstart; - } - - sort_viraddr(rsv_mm_info, num_block); - - for (i = 0; i< num_block; i++) { - - /* - * This API is used to exchage MFN for getting a block of - * contiguous physical addresses, its maximum size is 2M. - */ - #if LINUX_VERSION_CODE < KERNEL_VERSION(3, 13, 0) - if (xen_create_contiguous_region(rsv_mm_info[i].vir_addr, - DOM0_CONTIG_NUM_ORDER, 0) == 0) { - #else - if (xen_create_contiguous_region(rsv_mm_info[i].pfn * PAGE_SIZE, - DOM0_CONTIG_NUM_ORDER, 0, &dma_handle) == 0) { - #endif - rsv_mm_info[i].exchange_flag = 1; - rsv_mm_info[i].mfn = - pfn_to_mfn(rsv_mm_info[i].pfn); - rsv_mm_info[i].used = 0; - } else { - XEN_ERR("exchange memeory fail\n"); - rsv_mm_info[i].exchange_flag = 0; - dom0_dev.fail_times++; - if (dom0_dev.fail_times > MAX_EXCHANGE_FAIL_TIME) { - dom0_memory_free(rsv_size); - return -EFAULT; - } - } - } - - return 0; -} - -static int -dom0_prepare_memsegs(struct memory_info *meminfo, struct dom0_mm_data *mm_data) -{ - uint32_t num_block; - int idx; - - /* check if there is a free name buffer */ - memcpy(mm_data->name, meminfo->name, DOM0_NAME_MAX); - mm_data->name[DOM0_NAME_MAX - 1] = '\0'; - idx = dom0_find_mempos(); - if (idx < 0) - return -1; - - num_block = meminfo->size / SIZE_PER_BLOCK; - /* find free memory and new memory segments*/ - find_free_memory(num_block, mm_data); - find_memseg(num_block, mm_data); - - /* update private memory data */ - mm_data->refcnt++; - mm_data->mem_size = meminfo->size; - - /* update global memory data */ - dom0_dev.mm_data[idx] = mm_data; - dom0_dev.num_mem_ctx++; - dom0_dev.used_memsize += mm_data->mem_size; - - return 0; -} - -static int -dom0_check_memory (struct memory_info *meminfo) -{ - int idx; - uint64_t mem_size; - - /* round memory size to the next even number. */ - if (meminfo->size % 2) - ++meminfo->size; - - mem_size = meminfo->size; - if (dom0_dev.num_mem_ctx > NUM_MEM_CTX) { - XEN_ERR("Memory data space is full in Dom0 driver\n"); - return -1; - } - idx = dom0_find_memdata(meminfo->name); - if (idx >= 0) { - XEN_ERR("Memory data name %s has already exsited in Dom0 driver.\n", - meminfo->name); - return -1; - } - if ((dom0_dev.used_memsize + mem_size) > rsv_memsize) { - XEN_ERR("Total size can't be larger than reserved size.\n"); - return -1; - } - - return 0; -} - -static int __init -dom0_init(void) -{ - if (!xen_domain()) - return -ENODEV; - - if (rsv_memsize > DOM0_CONFIG_MEMSIZE) { - XEN_ERR("The reserved memory size cannot be greater than %d\n", - DOM0_CONFIG_MEMSIZE); - return -EINVAL; - } - - /* Setup the misc device */ - dom0_dev.miscdev.minor = MISC_DYNAMIC_MINOR; - dom0_dev.miscdev.name = "dom0_mm"; - dom0_dev.miscdev.fops = &data_fops; - - /* register misc char device */ - if (misc_register(&dom0_dev.miscdev) != 0) { - XEN_ERR("Misc device registration failed\n"); - return -EPERM; - } - - mutex_init(&dom0_dev.data_lock); - dom0_kobj = kobject_create_and_add("dom0-mm", mm_kobj); - - if (!dom0_kobj) { - XEN_ERR("dom0-mm object creation failed\n"); - misc_deregister(&dom0_dev.miscdev); - return -ENOMEM; - } - - if (sysfs_create_group(dom0_kobj, &dev_attr_grp)) { - kobject_put(dom0_kobj); - misc_deregister(&dom0_dev.miscdev); - return -EPERM; - } - - if (dom0_memory_reserve(rsv_memsize) < 0) { - sysfs_remove_group(dom0_kobj, &dev_attr_grp); - kobject_put(dom0_kobj); - misc_deregister(&dom0_dev.miscdev); - return -ENOMEM; - } - - XEN_PRINT("####### DPDK Xen Dom0 module loaded #######\n"); - - return 0; -} - -static void __exit -dom0_exit(void) -{ - if (rsv_mm_info != NULL) - dom0_memory_free(rsv_memsize); - - sysfs_remove_group(dom0_kobj, &dev_attr_grp); - kobject_put(dom0_kobj); - misc_deregister(&dom0_dev.miscdev); - - XEN_PRINT("####### DPDK Xen Dom0 module unloaded #######\n"); -} - -static int -dom0_open(struct inode *inode, struct file *file) -{ - file->private_data = NULL; - - XEN_PRINT(KERN_INFO "/dev/dom0_mm opened\n"); - return 0; -} - -static int -dom0_release(struct inode *inode, struct file *file) -{ - int ret = 0; - struct dom0_mm_data *mm_data = file->private_data; - - if (mm_data == NULL) - return ret; - - mutex_lock(&dom0_dev.data_lock); - if (--mm_data->refcnt == 0) - ret = dom0_memory_release(mm_data); - mutex_unlock(&dom0_dev.data_lock); - - file->private_data = NULL; - XEN_PRINT(KERN_INFO "/dev/dom0_mm closed\n"); - return ret; -} - -static int -dom0_mmap(struct file *file, struct vm_area_struct *vm) -{ - int status = 0; - uint32_t idx = vm->vm_pgoff; - uint64_t pfn, size = vm->vm_end - vm->vm_start; - struct dom0_mm_data *mm_data = file->private_data; - - if(mm_data == NULL) - return -EINVAL; - - mutex_lock(&dom0_dev.data_lock); - if (idx >= mm_data->num_memseg) { - mutex_unlock(&dom0_dev.data_lock); - return -EINVAL; - } - - if (size > mm_data->seg_info[idx].size){ - mutex_unlock(&dom0_dev.data_lock); - return -EINVAL; - } - - XEN_PRINT("mmap memseg idx =%d,size = 0x%llx\n", idx, size); - - pfn = mm_data->seg_info[idx].pfn; - mutex_unlock(&dom0_dev.data_lock); - - status = remap_pfn_range(vm, vm->vm_start, pfn, size, PAGE_SHARED); - - return status; -} -static int -dom0_ioctl(struct file *file, - unsigned int ioctl_num, - unsigned long ioctl_param) -{ - int idx, ret; - char name[DOM0_NAME_MAX] = {0}; - struct memory_info meminfo; - struct dom0_mm_data *mm_data = file->private_data; - - XEN_PRINT("IOCTL num=0x%0x param=0x%0lx \n", ioctl_num, ioctl_param); - - /** - * Switch according to the ioctl called - */ - switch _IOC_NR(ioctl_num) { - case _IOC_NR(RTE_DOM0_IOCTL_PREPARE_MEMSEG): - ret = copy_from_user(&meminfo, (void *)ioctl_param, - sizeof(struct memory_info)); - if (ret) - return -EFAULT; - - if (mm_data != NULL) { - XEN_ERR("Cannot create memory segment for the same" - " file descriptor\n"); - return -EINVAL; - } - - /* Allocate private data */ - mm_data = vmalloc(sizeof(struct dom0_mm_data)); - if (!mm_data) { - XEN_ERR("Unable to allocate device private data\n"); - return -ENOMEM; - } - memset(mm_data, 0, sizeof(struct dom0_mm_data)); - - mutex_lock(&dom0_dev.data_lock); - /* check if we can allocate memory*/ - if (dom0_check_memory(&meminfo) < 0) { - mutex_unlock(&dom0_dev.data_lock); - vfree(mm_data); - return -EINVAL; - } - - /* allocate memory and created memory segments*/ - if (dom0_prepare_memsegs(&meminfo, mm_data) < 0) { - XEN_ERR("create memory segment fail.\n"); - mutex_unlock(&dom0_dev.data_lock); - return -EIO; - } - - file->private_data = mm_data; - mutex_unlock(&dom0_dev.data_lock); - break; - - /* support multiple process in term of memory mapping*/ - case _IOC_NR(RTE_DOM0_IOCTL_ATTACH_TO_MEMSEG): - ret = copy_from_user(name, (void *)ioctl_param, - sizeof(char) * DOM0_NAME_MAX); - if (ret) - return -EFAULT; - - mutex_lock(&dom0_dev.data_lock); - idx = dom0_find_memdata(name); - if (idx < 0) { - mutex_unlock(&dom0_dev.data_lock); - return -EINVAL; - } - - mm_data = dom0_dev.mm_data[idx]; - mm_data->refcnt++; - file->private_data = mm_data; - mutex_unlock(&dom0_dev.data_lock); - break; - - case _IOC_NR(RTE_DOM0_IOCTL_GET_NUM_MEMSEG): - ret = copy_to_user((void *)ioctl_param, &mm_data->num_memseg, - sizeof(int)); - if (ret) - return -EFAULT; - break; - - case _IOC_NR(RTE_DOM0_IOCTL_GET_MEMSEG_INFO): - ret = copy_to_user((void *)ioctl_param, - &mm_data->seg_info[0], - sizeof(struct memseg_info) * - mm_data->num_memseg); - if (ret) - return -EFAULT; - break; - default: - XEN_PRINT("IOCTL default \n"); - break; - } - - return 0; -} - -module_init(dom0_init); -module_exit(dom0_exit); - -module_param(rsv_memsize, uint, S_IRUGO | S_IWUSR); -MODULE_PARM_DESC(rsv_memsize, "Xen-dom0 reserved memory size(MB).\n"); |