diff options
Diffstat (limited to 'src/dpdk_lib18/librte_vhost')
| -rwxr-xr-x | src/dpdk_lib18/librte_vhost/Makefile | 50 | ||||
| -rwxr-xr-x | src/dpdk_lib18/librte_vhost/eventfd_link/Makefile | 39 | ||||
| -rwxr-xr-x | src/dpdk_lib18/librte_vhost/eventfd_link/eventfd_link.c | 195 | ||||
| -rwxr-xr-x | src/dpdk_lib18/librte_vhost/eventfd_link/eventfd_link.h | 76 | ||||
| -rwxr-xr-x | src/dpdk_lib18/librte_vhost/libvirt/qemu-wrap.py | 367 | ||||
| -rwxr-xr-x | src/dpdk_lib18/librte_vhost/rte_virtio_net.h | 215 | ||||
| -rwxr-xr-x | src/dpdk_lib18/librte_vhost/vhost-net-cdev.c | 389 | ||||
| -rwxr-xr-x | src/dpdk_lib18/librte_vhost/vhost-net-cdev.h | 113 | ||||
| -rwxr-xr-x | src/dpdk_lib18/librte_vhost/vhost_rxtx.c | 730 | ||||
| -rwxr-xr-x | src/dpdk_lib18/librte_vhost/virtio-net.c | 1163 |
10 files changed, 3337 insertions, 0 deletions
diff --git a/src/dpdk_lib18/librte_vhost/Makefile b/src/dpdk_lib18/librte_vhost/Makefile new file mode 100755 index 00000000..c008d64a --- /dev/null +++ b/src/dpdk_lib18/librte_vhost/Makefile @@ -0,0 +1,50 @@ +# 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 $(RTE_SDK)/mk/rte.vars.mk + +# library name +LIB = librte_vhost.a + +CFLAGS += $(WERROR_FLAGS) -I$(SRCDIR) -O3 -D_FILE_OFFSET_BITS=64 -lfuse +LDFLAGS += -lfuse +# all source are stored in SRCS-y +SRCS-$(CONFIG_RTE_LIBRTE_VHOST) := vhost-net-cdev.c virtio-net.c vhost_rxtx.c + +# install includes +SYMLINK-$(CONFIG_RTE_LIBRTE_VHOST)-include += rte_virtio_net.h + +# dependencies +DEPDIRS-$(CONFIG_RTE_LIBRTE_VHOST) += lib/librte_eal +DEPDIRS-$(CONFIG_RTE_LIBRTE_VHOST) += lib/librte_ether +DEPDIRS-$(CONFIG_RTE_LIBRTE_VHOST) += lib/librte_mbuf + +include $(RTE_SDK)/mk/rte.lib.mk diff --git a/src/dpdk_lib18/librte_vhost/eventfd_link/Makefile b/src/dpdk_lib18/librte_vhost/eventfd_link/Makefile new file mode 100755 index 00000000..fc3927bf --- /dev/null +++ b/src/dpdk_lib18/librte_vhost/eventfd_link/Makefile @@ -0,0 +1,39 @@ +# BSD LICENSE +# +# Copyright(c) 2010-2014 Intel Corporation. All rights reserved. +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions +# are met: +# +# * Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# * Redistributions in binary form must reproduce the above copyright +# notice, this list of conditions and the following disclaimer in +# the documentation and/or other materials provided with the +# distribution. +# * Neither the name of Intel Corporation nor the names of its +# contributors may be used to endorse or promote products derived +# from this software without specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +obj-m += eventfd_link.o + + +all: + make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules + +clean: + make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean diff --git a/src/dpdk_lib18/librte_vhost/eventfd_link/eventfd_link.c b/src/dpdk_lib18/librte_vhost/eventfd_link/eventfd_link.c new file mode 100755 index 00000000..7755dd67 --- /dev/null +++ b/src/dpdk_lib18/librte_vhost/eventfd_link/eventfd_link.c @@ -0,0 +1,195 @@ +/*- + * 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 + */ + +#include <linux/eventfd.h> +#include <linux/miscdevice.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/rcupdate.h> +#include <linux/file.h> +#include <linux/slab.h> +#include <linux/fs.h> +#include <linux/mmu_context.h> +#include <linux/sched.h> +#include <asm/mmu_context.h> +#include <linux/fdtable.h> + +#include "eventfd_link.h" + + +/* + * get_files_struct is copied from fs/file.c + */ +struct files_struct * +get_files_struct(struct task_struct *task) +{ + struct files_struct *files; + + task_lock(task); + files = task->files; + if (files) + atomic_inc(&files->count); + task_unlock(task); + + return files; +} + +/* + * put_files_struct is extracted from fs/file.c + */ +void +put_files_struct(struct files_struct *files) +{ + if (atomic_dec_and_test(&files->count)) + BUG(); +} + + +static long +eventfd_link_ioctl(struct file *f, unsigned int ioctl, unsigned long arg) +{ + void __user *argp = (void __user *) arg; + struct task_struct *task_target = NULL; + struct file *file; + struct files_struct *files; + struct fdtable *fdt; + struct eventfd_copy eventfd_copy; + + switch (ioctl) { + case EVENTFD_COPY: + if (copy_from_user(&eventfd_copy, argp, + sizeof(struct eventfd_copy))) + return -EFAULT; + + /* + * Find the task struct for the target pid + */ + task_target = + pid_task(find_vpid(eventfd_copy.target_pid), PIDTYPE_PID); + if (task_target == NULL) { + pr_debug("Failed to get mem ctx for target pid\n"); + return -EFAULT; + } + + files = get_files_struct(current); + if (files == NULL) { + pr_debug("Failed to get files struct\n"); + return -EFAULT; + } + + rcu_read_lock(); + file = fcheck_files(files, eventfd_copy.source_fd); + if (file) { + if (file->f_mode & FMODE_PATH || + !atomic_long_inc_not_zero(&file->f_count)) + file = NULL; + } + rcu_read_unlock(); + put_files_struct(files); + + if (file == NULL) { + pr_debug("Failed to get file from source pid\n"); + return 0; + } + + /* + * Release the existing eventfd in the source process + */ + spin_lock(&files->file_lock); + filp_close(file, files); + fdt = files_fdtable(files); + fdt->fd[eventfd_copy.source_fd] = NULL; + spin_unlock(&files->file_lock); + + /* + * Find the file struct associated with the target fd. + */ + + files = get_files_struct(task_target); + if (files == NULL) { + pr_debug("Failed to get files struct\n"); + return -EFAULT; + } + + rcu_read_lock(); + file = fcheck_files(files, eventfd_copy.target_fd); + if (file) { + if (file->f_mode & FMODE_PATH || + !atomic_long_inc_not_zero(&file->f_count)) + file = NULL; + } + rcu_read_unlock(); + put_files_struct(files); + + if (file == NULL) { + pr_debug("Failed to get file from target pid\n"); + return 0; + } + + /* + * Install the file struct from the target process into the + * file desciptor of the source process, + */ + + fd_install(eventfd_copy.source_fd, file); + + return 0; + + default: + return -ENOIOCTLCMD; + } +} + +static const struct file_operations eventfd_link_fops = { + .owner = THIS_MODULE, + .unlocked_ioctl = eventfd_link_ioctl, +}; + + +static struct miscdevice eventfd_link_misc = { + .name = "eventfd-link", + .fops = &eventfd_link_fops, +}; + +static int __init +eventfd_link_init(void) +{ + return misc_register(&eventfd_link_misc); +} + +module_init(eventfd_link_init); + +static void __exit +eventfd_link_exit(void) +{ + misc_deregister(&eventfd_link_misc); +} + +module_exit(eventfd_link_exit); + +MODULE_VERSION("0.0.1"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Anthony Fee"); +MODULE_DESCRIPTION("Link eventfd"); +MODULE_ALIAS("devname:eventfd-link"); diff --git a/src/dpdk_lib18/librte_vhost/eventfd_link/eventfd_link.h b/src/dpdk_lib18/librte_vhost/eventfd_link/eventfd_link.h new file mode 100755 index 00000000..ea619ec0 --- /dev/null +++ b/src/dpdk_lib18/librte_vhost/eventfd_link/eventfd_link.h @@ -0,0 +1,76 @@ +/*- + * 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. + * + */ + +#ifndef _EVENTFD_LINK_H_ +#define _EVENTFD_LINK_H_ + +/* + * ioctl to copy an fd entry in calling process to an fd in a target process + */ +#define EVENTFD_COPY 1 + +/* + * arguements for the EVENTFD_COPY ioctl + */ +struct eventfd_copy { + unsigned target_fd; /* fd in the target pid */ + unsigned source_fd; /* fd in the calling pid */ + pid_t target_pid; /* pid of the target pid */ +}; +#endif /* _EVENTFD_LINK_H_ */ diff --git a/src/dpdk_lib18/librte_vhost/libvirt/qemu-wrap.py b/src/dpdk_lib18/librte_vhost/libvirt/qemu-wrap.py new file mode 100755 index 00000000..e2d68a0e --- /dev/null +++ b/src/dpdk_lib18/librte_vhost/libvirt/qemu-wrap.py @@ -0,0 +1,367 @@ +#!/usr/bin/python +#/* +# * 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. +# */ + +##################################################################### +# This script is designed to modify the call to the QEMU emulator +# to support userspace vhost when starting a guest machine through +# libvirt with vhost enabled. The steps to enable this are as follows +# and should be run as root: +# +# 1. Place this script in a libvirtd's binary search PATH ($PATH) +# A good location would be in the same directory that the QEMU +# binary is located +# +# 2. Ensure that the script has the same owner/group and file +# permissions as the QEMU binary +# +# 3. Update the VM xml file using "virsh edit VM.xml" +# +# 3.a) Set the VM to use the launch script +# +# Set the emulator path contained in the +# <emulator><emulator/> tags +# +# e.g replace <emulator>/usr/bin/qemu-kvm<emulator/> +# with <emulator>/usr/bin/qemu-wrap.py<emulator/> +# +# 3.b) Set the VM's device's to use vhost-net offload +# +# <interface type="network"> +# <model type="virtio"/> +# <driver name="vhost"/> +# <interface/> +# +# 4. Enable libvirt to access our userpace device file by adding it to +# controllers cgroup for libvirtd using the following steps +# +# 4.a) In /etc/libvirt/qemu.conf add/edit the following lines: +# 1) cgroup_controllers = [ ... "devices", ... ] +# 2) clear_emulator_capabilities = 0 +# 3) user = "root" +# 4) group = "root" +# 5) cgroup_device_acl = [ +# "/dev/null", "/dev/full", "/dev/zero", +# "/dev/random", "/dev/urandom", +# "/dev/ptmx", "/dev/kvm", "/dev/kqemu", +# "/dev/rtc", "/dev/hpet", "/dev/net/tun", +# "/dev/<devbase-name>-<index>", +# ] +# +# 4.b) Disable SELinux or set to permissive mode +# +# 4.c) Mount cgroup device controller +# "mkdir /dev/cgroup" +# "mount -t cgroup none /dev/cgroup -o devices" +# +# 4.d) Set hugetlbfs_mount variable - ( Optional ) +# VMs using userspace vhost must use hugepage backed +# memory. This can be enabled in the libvirt XML +# config by adding a memory backing section to the +# XML config e.g. +# <memoryBacking> +# <hugepages/> +# </memoryBacking> +# This memory backing section should be added after the +# <memory> and <currentMemory> sections. This will add +# flags "-mem-prealloc -mem-path <path>" to the QEMU +# command line. The hugetlbfs_mount variable can be used +# to override the default <path> passed through by libvirt. +# +# if "-mem-prealloc" or "-mem-path <path>" are not passed +# through and a vhost device is detected then these options will +# be automatically added by this script. This script will detect +# the system hugetlbfs mount point to be used for <path>. The +# default <path> for this script can be overidden by the +# hugetlbfs_dir variable in the configuration section of this script. +# +# +# 4.e) Restart the libvirtd system process +# e.g. on Fedora "systemctl restart libvirtd.service" +# +# +# 4.f) Edit the Configuration Parameters section of this script +# to point to the correct emulator location and set any +# addition options +# +# The script modifies the libvirtd Qemu call by modifying/adding +# options based on the configuration parameters below. +# NOTE: +# emul_path and us_vhost_path must be set +# All other parameters are optional +##################################################################### + + +############################################# +# Configuration Parameters +############################################# +#Path to QEMU binary +emul_path = "/usr/local/bin/qemu-system-x86_64" + +#Path to userspace vhost device file +# This filename should match the --dev-basename --dev-index parameters of +# the command used to launch the userspace vhost sample application e.g. +# if the sample app lauch command is: +# ./build/vhost-switch ..... --dev-basename usvhost --dev-index 1 +# then this variable should be set to: +# us_vhost_path = "/dev/usvhost-1" +us_vhost_path = "/dev/usvhost-1" + +#List of additional user defined emulation options. These options will +#be added to all Qemu calls +emul_opts_user = [] + +#List of additional user defined emulation options for vhost only. +#These options will only be added to vhost enabled guests +emul_opts_user_vhost = [] + +#For all VHOST enabled VMs, the VM memory is preallocated from hugetlbfs +# Set this variable to one to enable this option for all VMs +use_huge_all = 0 + +#Instead of autodetecting, override the hugetlbfs directory by setting +#this variable +hugetlbfs_dir = "" + +############################################# + + +############################################# +# ****** Do Not Modify Below this Line ****** +############################################# + +import sys, os, subprocess + + +#List of open userspace vhost file descriptors +fd_list = [] + +#additional virtio device flags when using userspace vhost +vhost_flags = [ "csum=off", + "gso=off", + "guest_tso4=off", + "guest_tso6=off", + "guest_ecn=off" + ] + + +############################################# +# Find the system hugefile mount point. +# Note: +# if multiple hugetlbfs mount points exist +# then the first one found will be used +############################################# +def find_huge_mount(): + + if (len(hugetlbfs_dir)): + return hugetlbfs_dir + + huge_mount = "" + + if (os.access("/proc/mounts", os.F_OK)): + f = open("/proc/mounts", "r") + line = f.readline() + while line: + line_split = line.split(" ") + if line_split[2] == 'hugetlbfs': + huge_mount = line_split[1] + break + line = f.readline() + else: + print "/proc/mounts not found" + exit (1) + + f.close + if len(huge_mount) == 0: + print "Failed to find hugetlbfs mount point" + exit (1) + + return huge_mount + + +############################################# +# Get a userspace Vhost file descriptor +############################################# +def get_vhost_fd(): + + if (os.access(us_vhost_path, os.F_OK)): + fd = os.open( us_vhost_path, os.O_RDWR) + else: + print ("US-Vhost file %s not found" %us_vhost_path) + exit (1) + + return fd + + +############################################# +# Check for vhostfd. if found then replace +# with our own vhost fd and append any vhost +# flags onto the end +############################################# +def modify_netdev_arg(arg): + + global fd_list + vhost_in_use = 0 + s = '' + new_opts = [] + netdev_opts = arg.split(",") + + for opt in netdev_opts: + #check if vhost is used + if "vhost" == opt[:5]: + vhost_in_use = 1 + else: + new_opts.append(opt) + + #if using vhost append vhost options + if vhost_in_use == 1: + #append vhost on option + new_opts.append('vhost=on') + #append vhostfd ption + new_fd = get_vhost_fd() + new_opts.append('vhostfd=' + str(new_fd)) + fd_list.append(new_fd) + + #concatenate all options + for opt in new_opts: + if len(s) > 0: + s+=',' + + s+=opt + + return s + + +############################################# +# Main +############################################# +def main(): + + global fd_list + global vhost_in_use + new_args = [] + num_cmd_args = len(sys.argv) + emul_call = '' + mem_prealloc_set = 0 + mem_path_set = 0 + num = 0; + + #parse the parameters + while (num < num_cmd_args): + arg = sys.argv[num] + + #Check netdev +1 parameter for vhostfd + if arg == '-netdev': + num_vhost_devs = len(fd_list) + new_args.append(arg) + + num+=1 + arg = sys.argv[num] + mod_arg = modify_netdev_arg(arg) + new_args.append(mod_arg) + + #append vhost flags if this is a vhost device + # and -device is the next arg + # i.e -device -opt1,-opt2,...,-opt3,%vhost + if (num_vhost_devs < len(fd_list)): + num+=1 + arg = sys.argv[num] + if arg == '-device': + new_args.append(arg) + num+=1 + new_arg = sys.argv[num] + for flag in vhost_flags: + new_arg = ''.join([new_arg,',',flag]) + new_args.append(new_arg) + else: + new_args.append(arg) + elif arg == '-mem-prealloc': + mem_prealloc_set = 1 + new_args.append(arg) + elif arg == '-mem-path': + mem_path_set = 1 + new_args.append(arg) + + else: + new_args.append(arg) + + num+=1 + + #Set Qemu binary location + emul_call+=emul_path + emul_call+=" " + + #Add prealloc mem options if using vhost and not already added + if ((len(fd_list) > 0) and (mem_prealloc_set == 0)): + emul_call += "-mem-prealloc " + + #Add mempath mem options if using vhost and not already added + if ((len(fd_list) > 0) and (mem_path_set == 0)): + #Detect and add hugetlbfs mount point + mp = find_huge_mount() + mp = "".join(["-mem-path ", mp]) + emul_call += mp + emul_call += " " + + + #add user options + for opt in emul_opts_user: + emul_call += opt + emul_call += " " + + #Add add user vhost only options + if len(fd_list) > 0: + for opt in emul_opts_user_vhost: + emul_call += opt + emul_call += " " + + #Add updated libvirt options + iter_args = iter(new_args) + #skip 1st arg i.e. call to this script + next(iter_args) + for arg in iter_args: + emul_call+=str(arg) + emul_call+= " " + + #Call QEMU + subprocess.call(emul_call, shell=True) + + + #Close usvhost files + for fd in fd_list: + os.close(fd) + + +if __name__ == "__main__": + main() + diff --git a/src/dpdk_lib18/librte_vhost/rte_virtio_net.h b/src/dpdk_lib18/librte_vhost/rte_virtio_net.h new file mode 100755 index 00000000..0bf07c72 --- /dev/null +++ b/src/dpdk_lib18/librte_vhost/rte_virtio_net.h @@ -0,0 +1,215 @@ +/*- + * 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. + */ + +#ifndef _VIRTIO_NET_H_ +#define _VIRTIO_NET_H_ + +/** + * @file + * Interface to vhost net + */ + +#include <stdint.h> +#include <linux/virtio_ring.h> +#include <linux/virtio_net.h> +#include <sys/eventfd.h> +#include <sys/socket.h> +#include <linux/if.h> + +#include <rte_memory.h> +#include <rte_mempool.h> +#include <rte_mbuf.h> + +/* Used to indicate that the device is running on a data core */ +#define VIRTIO_DEV_RUNNING 1 + +/* Backend value set by guest. */ +#define VIRTIO_DEV_STOPPED -1 + + +/* Enum for virtqueue management. */ +enum {VIRTIO_RXQ, VIRTIO_TXQ, VIRTIO_QNUM}; + +#define BUF_VECTOR_MAX 256 + +/** + * Structure contains buffer address, length and descriptor index + * from vring to do scatter RX. + */ +struct buf_vector { + uint64_t buf_addr; + uint32_t buf_len; + uint32_t desc_idx; +}; + +/** + * Structure contains variables relevant to RX/TX virtqueues. + */ +struct vhost_virtqueue { + struct vring_desc *desc; /**< Virtqueue descriptor ring. */ + struct vring_avail *avail; /**< Virtqueue available ring. */ + struct vring_used *used; /**< Virtqueue used ring. */ + uint32_t size; /**< Size of descriptor ring. */ + uint32_t backend; /**< Backend value to determine if device should started/stopped. */ + uint16_t vhost_hlen; /**< Vhost header length (varies depending on RX merge buffers. */ + volatile uint16_t last_used_idx; /**< Last index used on the available ring */ + volatile uint16_t last_used_idx_res; /**< Used for multiple devices reserving buffers. */ + eventfd_t callfd; /**< Currently unused as polling mode is enabled. */ + eventfd_t kickfd; /**< Used to notify the guest (trigger interrupt). */ + struct buf_vector buf_vec[BUF_VECTOR_MAX]; /**< for scatter RX. */ +} __rte_cache_aligned; + +/** + * Device structure contains all configuration information relating to the device. + */ +struct virtio_net { + struct vhost_virtqueue *virtqueue[VIRTIO_QNUM]; /**< Contains all virtqueue information. */ + struct virtio_memory *mem; /**< QEMU memory and memory region information. */ + uint64_t features; /**< Negotiated feature set. */ + uint64_t device_fh; /**< device identifier. */ + uint32_t flags; /**< Device flags. Only used to check if device is running on data core. */ + char ifname[IFNAMSIZ]; /**< Name of the tap device. */ + void *priv; /**< private context */ +} __rte_cache_aligned; + +/** + * Information relating to memory regions including offsets to addresses in QEMUs memory file. + */ +struct virtio_memory_regions { + uint64_t guest_phys_address; /**< Base guest physical address of region. */ + uint64_t guest_phys_address_end; /**< End guest physical address of region. */ + uint64_t memory_size; /**< Size of region. */ + uint64_t userspace_address; /**< Base userspace address of region. */ + uint64_t address_offset; /**< Offset of region for address translation. */ +}; + + +/** + * Memory structure includes region and mapping information. + */ +struct virtio_memory { + uint64_t base_address; /**< Base QEMU userspace address of the memory file. */ + uint64_t mapped_address; /**< Mapped address of memory file base in our applications memory space. */ + uint64_t mapped_size; /**< Total size of memory file. */ + uint32_t nregions; /**< Number of memory regions. */ + struct virtio_memory_regions regions[0]; /**< Memory region information. */ +}; + +/** + * Device operations to add/remove device. + */ +struct virtio_net_device_ops { + int (*new_device)(struct virtio_net *); /**< Add device. */ + void (*destroy_device)(volatile struct virtio_net *); /**< Remove device. */ +}; + +static inline uint16_t __attribute__((always_inline)) +rte_vring_available_entries(struct virtio_net *dev, uint16_t queue_id) +{ + struct vhost_virtqueue *vq = dev->virtqueue[queue_id]; + return *(volatile uint16_t *)&vq->avail->idx - vq->last_used_idx_res; +} + +/** + * Function to convert guest physical addresses to vhost virtual addresses. + * This is used to convert guest virtio buffer addresses. + */ +static inline uint64_t __attribute__((always_inline)) +gpa_to_vva(struct virtio_net *dev, uint64_t guest_pa) +{ + struct virtio_memory_regions *region; + uint32_t regionidx; + uint64_t vhost_va = 0; + + for (regionidx = 0; regionidx < dev->mem->nregions; regionidx++) { + region = &dev->mem->regions[regionidx]; + if ((guest_pa >= region->guest_phys_address) && + (guest_pa <= region->guest_phys_address_end)) { + vhost_va = region->address_offset + guest_pa; + break; + } + } + return vhost_va; +} + +/** + * Disable features in feature_mask. Returns 0 on success. + */ +int rte_vhost_feature_disable(uint64_t feature_mask); + +/** + * Enable features in feature_mask. Returns 0 on success. + */ +int rte_vhost_feature_enable(uint64_t feature_mask); + +/* Returns currently supported vhost features */ +uint64_t rte_vhost_feature_get(void); + +int rte_vhost_enable_guest_notification(struct virtio_net *dev, uint16_t queue_id, int enable); + +/* Register vhost driver. dev_name could be different for multiple instance support. */ +int rte_vhost_driver_register(const char *dev_name); + +/* Register callbacks. */ +int rte_vhost_driver_callback_register(struct virtio_net_device_ops const * const); +/* Start vhost driver session blocking loop. */ +int rte_vhost_driver_session_start(void); + +/** + * This function adds buffers to the virtio devices RX virtqueue. Buffers can + * be received from the physical port or from another virtual device. A packet + * count is returned to indicate the number of packets that were succesfully + * added to the RX queue. + * @param queue_id + * virtio queue index in mq case + * @return + * num of packets enqueued + */ +uint16_t rte_vhost_enqueue_burst(struct virtio_net *dev, uint16_t queue_id, + struct rte_mbuf **pkts, uint16_t count); + +/** + * This function gets guest buffers from the virtio device TX virtqueue, + * construct host mbufs, copies guest buffer content to host mbufs and + * store them in pkts to be processed. + * @param mbuf_pool + * mbuf_pool where host mbuf is allocated. + * @param queue_id + * virtio queue index in mq case. + * @return + * num of packets dequeued + */ +uint16_t rte_vhost_dequeue_burst(struct virtio_net *dev, uint16_t queue_id, + struct rte_mempool *mbuf_pool, struct rte_mbuf **pkts, uint16_t count); + +#endif /* _VIRTIO_NET_H_ */ diff --git a/src/dpdk_lib18/librte_vhost/vhost-net-cdev.c b/src/dpdk_lib18/librte_vhost/vhost-net-cdev.c new file mode 100755 index 00000000..57c76cb0 --- /dev/null +++ b/src/dpdk_lib18/librte_vhost/vhost-net-cdev.c @@ -0,0 +1,389 @@ +/*- + * 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 <fuse/cuse_lowlevel.h> +#include <linux/limits.h> +#include <linux/vhost.h> +#include <stdint.h> +#include <string.h> +#include <unistd.h> + +#include <rte_ethdev.h> +#include <rte_log.h> +#include <rte_string_fns.h> +#include <rte_virtio_net.h> + +#include "vhost-net-cdev.h" + +#define FUSE_OPT_DUMMY "\0\0" +#define FUSE_OPT_FORE "-f\0\0" +#define FUSE_OPT_NOMULTI "-s\0\0" + +static const uint32_t default_major = 231; +static const uint32_t default_minor = 1; +static const char cuse_device_name[] = "/dev/cuse"; +static const char default_cdev[] = "vhost-net"; + +static struct fuse_session *session; +static struct vhost_net_device_ops const *ops; + +/* + * Returns vhost_device_ctx from given fuse_req_t. The index is populated later + * when the device is added to the device linked list. + */ +static struct vhost_device_ctx +fuse_req_to_vhost_ctx(fuse_req_t req, struct fuse_file_info *fi) +{ + struct vhost_device_ctx ctx; + struct fuse_ctx const *const req_ctx = fuse_req_ctx(req); + + ctx.pid = req_ctx->pid; + ctx.fh = fi->fh; + + return ctx; +} + +/* + * When the device is created in QEMU it gets initialised here and + * added to the device linked list. + */ +static void +vhost_net_open(fuse_req_t req, struct fuse_file_info *fi) +{ + struct vhost_device_ctx ctx = fuse_req_to_vhost_ctx(req, fi); + int err = 0; + + err = ops->new_device(ctx); + if (err == -1) { + fuse_reply_err(req, EPERM); + return; + } + + fi->fh = err; + + RTE_LOG(INFO, VHOST_CONFIG, + "(%"PRIu64") Device configuration started\n", fi->fh); + fuse_reply_open(req, fi); +} + +/* + * When QEMU is shutdown or killed the device gets released. + */ +static void +vhost_net_release(fuse_req_t req, struct fuse_file_info *fi) +{ + int err = 0; + struct vhost_device_ctx ctx = fuse_req_to_vhost_ctx(req, fi); + + ops->destroy_device(ctx); + RTE_LOG(INFO, VHOST_CONFIG, "(%"PRIu64") Device released\n", ctx.fh); + fuse_reply_err(req, err); +} + +/* + * Boilerplate code for CUSE IOCTL + * Implicit arguments: ctx, req, result. + */ +#define VHOST_IOCTL(func) do { \ + result = (func)(ctx); \ + fuse_reply_ioctl(req, result, NULL, 0); \ +} while (0) + +/* + * Boilerplate IOCTL RETRY + * Implicit arguments: req. + */ +#define VHOST_IOCTL_RETRY(size_r, size_w) do { \ + struct iovec iov_r = { arg, (size_r) }; \ + struct iovec iov_w = { arg, (size_w) }; \ + fuse_reply_ioctl_retry(req, &iov_r, \ + (size_r) ? 1 : 0, &iov_w, (size_w) ? 1 : 0);\ +} while (0) + +/* + * Boilerplate code for CUSE Read IOCTL + * Implicit arguments: ctx, req, result, in_bufsz, in_buf. + */ +#define VHOST_IOCTL_R(type, var, func) do { \ + if (!in_bufsz) { \ + VHOST_IOCTL_RETRY(sizeof(type), 0);\ + } else { \ + (var) = *(const type*)in_buf; \ + result = func(ctx, &(var)); \ + fuse_reply_ioctl(req, result, NULL, 0);\ + } \ +} while (0) + +/* + * Boilerplate code for CUSE Write IOCTL + * Implicit arguments: ctx, req, result, out_bufsz. + */ +#define VHOST_IOCTL_W(type, var, func) do { \ + if (!out_bufsz) { \ + VHOST_IOCTL_RETRY(0, sizeof(type));\ + } else { \ + result = (func)(ctx, &(var));\ + fuse_reply_ioctl(req, result, &(var), sizeof(type));\ + } \ +} while (0) + +/* + * Boilerplate code for CUSE Read/Write IOCTL + * Implicit arguments: ctx, req, result, in_bufsz, in_buf. + */ +#define VHOST_IOCTL_RW(type1, var1, type2, var2, func) do { \ + if (!in_bufsz) { \ + VHOST_IOCTL_RETRY(sizeof(type1), sizeof(type2));\ + } else { \ + (var1) = *(const type1*) (in_buf); \ + result = (func)(ctx, (var1), &(var2)); \ + fuse_reply_ioctl(req, result, &(var2), sizeof(type2));\ + } \ +} while (0) + +/* + * The IOCTLs are handled using CUSE/FUSE in userspace. Depending on the type + * of IOCTL a buffer is requested to read or to write. This request is handled + * by FUSE and the buffer is then given to CUSE. + */ +static void +vhost_net_ioctl(fuse_req_t req, int cmd, void *arg, + struct fuse_file_info *fi, __rte_unused unsigned flags, + const void *in_buf, size_t in_bufsz, size_t out_bufsz) +{ + struct vhost_device_ctx ctx = fuse_req_to_vhost_ctx(req, fi); + struct vhost_vring_file file; + struct vhost_vring_state state; + struct vhost_vring_addr addr; + uint64_t features; + uint32_t index; + int result = 0; + + switch (cmd) { + case VHOST_NET_SET_BACKEND: + LOG_DEBUG(VHOST_CONFIG, + "(%"PRIu64") IOCTL: VHOST_NET_SET_BACKEND\n", ctx.fh); + VHOST_IOCTL_R(struct vhost_vring_file, file, ops->set_backend); + break; + + case VHOST_GET_FEATURES: + LOG_DEBUG(VHOST_CONFIG, + "(%"PRIu64") IOCTL: VHOST_GET_FEATURES\n", ctx.fh); + VHOST_IOCTL_W(uint64_t, features, ops->get_features); + break; + + case VHOST_SET_FEATURES: + LOG_DEBUG(VHOST_CONFIG, + "(%"PRIu64") IOCTL: VHOST_SET_FEATURES\n", ctx.fh); + VHOST_IOCTL_R(uint64_t, features, ops->set_features); + break; + + case VHOST_RESET_OWNER: + LOG_DEBUG(VHOST_CONFIG, + "(%"PRIu64") IOCTL: VHOST_RESET_OWNER\n", ctx.fh); + VHOST_IOCTL(ops->reset_owner); + break; + + case VHOST_SET_OWNER: + LOG_DEBUG(VHOST_CONFIG, + "(%"PRIu64") IOCTL: VHOST_SET_OWNER\n", ctx.fh); + VHOST_IOCTL(ops->set_owner); + break; + + case VHOST_SET_MEM_TABLE: + /*TODO fix race condition.*/ + LOG_DEBUG(VHOST_CONFIG, + "(%"PRIu64") IOCTL: VHOST_SET_MEM_TABLE\n", ctx.fh); + static struct vhost_memory mem_temp; + + switch (in_bufsz) { + case 0: + VHOST_IOCTL_RETRY(sizeof(struct vhost_memory), 0); + break; + + case sizeof(struct vhost_memory): + mem_temp = *(const struct vhost_memory *) in_buf; + + if (mem_temp.nregions > 0) { + VHOST_IOCTL_RETRY(sizeof(struct vhost_memory) + + (sizeof(struct vhost_memory_region) * + mem_temp.nregions), 0); + } else { + result = -1; + fuse_reply_ioctl(req, result, NULL, 0); + } + break; + + default: + result = ops->set_mem_table(ctx, + in_buf, mem_temp.nregions); + if (result) + fuse_reply_err(req, EINVAL); + else + fuse_reply_ioctl(req, result, NULL, 0); + } + break; + + case VHOST_SET_VRING_NUM: + LOG_DEBUG(VHOST_CONFIG, + "(%"PRIu64") IOCTL: VHOST_SET_VRING_NUM\n", ctx.fh); + VHOST_IOCTL_R(struct vhost_vring_state, state, + ops->set_vring_num); + break; + + case VHOST_SET_VRING_BASE: + LOG_DEBUG(VHOST_CONFIG, + "(%"PRIu64") IOCTL: VHOST_SET_VRING_BASE\n", ctx.fh); + VHOST_IOCTL_R(struct vhost_vring_state, state, + ops->set_vring_base); + break; + + case VHOST_GET_VRING_BASE: + LOG_DEBUG(VHOST_CONFIG, + "(%"PRIu64") IOCTL: VHOST_GET_VRING_BASE\n", ctx.fh); + VHOST_IOCTL_RW(uint32_t, index, + struct vhost_vring_state, state, ops->get_vring_base); + break; + + case VHOST_SET_VRING_ADDR: + LOG_DEBUG(VHOST_CONFIG, + "(%"PRIu64") IOCTL: VHOST_SET_VRING_ADDR\n", ctx.fh); + VHOST_IOCTL_R(struct vhost_vring_addr, addr, + ops->set_vring_addr); + break; + + case VHOST_SET_VRING_KICK: + LOG_DEBUG(VHOST_CONFIG, + "(%"PRIu64") IOCTL: VHOST_SET_VRING_KICK\n", ctx.fh); + VHOST_IOCTL_R(struct vhost_vring_file, file, + ops->set_vring_kick); + break; + + case VHOST_SET_VRING_CALL: + LOG_DEBUG(VHOST_CONFIG, + "(%"PRIu64") IOCTL: VHOST_SET_VRING_CALL\n", ctx.fh); + VHOST_IOCTL_R(struct vhost_vring_file, file, + ops->set_vring_call); + break; + + default: + RTE_LOG(ERR, VHOST_CONFIG, + "(%"PRIu64") IOCTL: DOESN NOT EXIST\n", ctx.fh); + result = -1; + fuse_reply_ioctl(req, result, NULL, 0); + } + + if (result < 0) + LOG_DEBUG(VHOST_CONFIG, + "(%"PRIu64") IOCTL: FAIL\n", ctx.fh); + else + LOG_DEBUG(VHOST_CONFIG, + "(%"PRIu64") IOCTL: SUCCESS\n", ctx.fh); +} + +/* + * Structure handling open, release and ioctl function pointers is populated. + */ +static const struct cuse_lowlevel_ops vhost_net_ops = { + .open = vhost_net_open, + .release = vhost_net_release, + .ioctl = vhost_net_ioctl, +}; + +/* + * cuse_info is populated and used to register the cuse device. + * vhost_net_device_ops are also passed when the device is registered in app. + */ +int +rte_vhost_driver_register(const char *dev_name) +{ + struct cuse_info cuse_info; + char device_name[PATH_MAX] = ""; + char char_device_name[PATH_MAX] = ""; + const char *device_argv[] = { device_name }; + + char fuse_opt_dummy[] = FUSE_OPT_DUMMY; + char fuse_opt_fore[] = FUSE_OPT_FORE; + char fuse_opt_nomulti[] = FUSE_OPT_NOMULTI; + char *fuse_argv[] = {fuse_opt_dummy, fuse_opt_fore, fuse_opt_nomulti}; + + if (access(cuse_device_name, R_OK | W_OK) < 0) { + RTE_LOG(ERR, VHOST_CONFIG, + "char device %s can't be accessed, maybe not exist\n", + cuse_device_name); + return -1; + } + + /* + * The device name is created. This is passed to QEMU so that it can + * register the device with our application. + */ + snprintf(device_name, PATH_MAX, "DEVNAME=%s", dev_name); + snprintf(char_device_name, PATH_MAX, "/dev/%s", dev_name); + + /* Check if device already exists. */ + if (access(char_device_name, F_OK) != -1) { + RTE_LOG(ERR, VHOST_CONFIG, + "char device %s already exists\n", char_device_name); + return -1; + } + + memset(&cuse_info, 0, sizeof(cuse_info)); + cuse_info.dev_major = default_major; + cuse_info.dev_minor = default_minor; + cuse_info.dev_info_argc = 1; + cuse_info.dev_info_argv = device_argv; + cuse_info.flags = CUSE_UNRESTRICTED_IOCTL; + + ops = get_virtio_net_callbacks(); + + session = cuse_lowlevel_setup(3, fuse_argv, + &cuse_info, &vhost_net_ops, 0, NULL); + if (session == NULL) + return -1; + + return 0; +} + +/** + * The CUSE session is launched allowing the application to receive open, + * release and ioctl calls. + */ +int +rte_vhost_driver_session_start(void) +{ + fuse_session_loop(session); + + return 0; +} diff --git a/src/dpdk_lib18/librte_vhost/vhost-net-cdev.h b/src/dpdk_lib18/librte_vhost/vhost-net-cdev.h new file mode 100755 index 00000000..03a5c575 --- /dev/null +++ b/src/dpdk_lib18/librte_vhost/vhost-net-cdev.h @@ -0,0 +1,113 @@ +/*- + * 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. + */ + +#ifndef _VHOST_NET_CDEV_H_ +#define _VHOST_NET_CDEV_H_ +#include <stdint.h> +#include <stdio.h> +#include <sys/types.h> +#include <unistd.h> +#include <linux/vhost.h> + +#include <rte_log.h> + +/* Macros for printing using RTE_LOG */ +#define RTE_LOGTYPE_VHOST_CONFIG RTE_LOGTYPE_USER1 +#define RTE_LOGTYPE_VHOST_DATA RTE_LOGTYPE_USER1 + +#ifdef RTE_LIBRTE_VHOST_DEBUG +#define VHOST_MAX_PRINT_BUFF 6072 +#define LOG_LEVEL RTE_LOG_DEBUG +#define LOG_DEBUG(log_type, fmt, args...) RTE_LOG(DEBUG, log_type, fmt, ##args) +#define PRINT_PACKET(device, addr, size, header) do { \ + char *pkt_addr = (char *)(addr); \ + unsigned int index; \ + char packet[VHOST_MAX_PRINT_BUFF]; \ + \ + if ((header)) \ + snprintf(packet, VHOST_MAX_PRINT_BUFF, "(%"PRIu64") Header size %d: ", (device->device_fh), (size)); \ + else \ + snprintf(packet, VHOST_MAX_PRINT_BUFF, "(%"PRIu64") Packet size %d: ", (device->device_fh), (size)); \ + for (index = 0; index < (size); index++) { \ + snprintf(packet + strnlen(packet, VHOST_MAX_PRINT_BUFF), VHOST_MAX_PRINT_BUFF - strnlen(packet, VHOST_MAX_PRINT_BUFF), \ + "%02hhx ", pkt_addr[index]); \ + } \ + snprintf(packet + strnlen(packet, VHOST_MAX_PRINT_BUFF), VHOST_MAX_PRINT_BUFF - strnlen(packet, VHOST_MAX_PRINT_BUFF), "\n"); \ + \ + LOG_DEBUG(VHOST_DATA, "%s", packet); \ +} while (0) +#else +#define LOG_LEVEL RTE_LOG_INFO +#define LOG_DEBUG(log_type, fmt, args...) do {} while (0) +#define PRINT_PACKET(device, addr, size, header) do {} while (0) +#endif + + +/* + * Structure used to identify device context. + */ +struct vhost_device_ctx { + pid_t pid; /* PID of process calling the IOCTL. */ + uint64_t fh; /* Populated with fi->fh to track the device index. */ +}; + +/* + * Structure contains function pointers to be defined in virtio-net.c. These + * functions are called in CUSE context and are used to configure devices. + */ +struct vhost_net_device_ops { + int (*new_device)(struct vhost_device_ctx); + void (*destroy_device)(struct vhost_device_ctx); + + int (*get_features)(struct vhost_device_ctx, uint64_t *); + int (*set_features)(struct vhost_device_ctx, uint64_t *); + + int (*set_mem_table)(struct vhost_device_ctx, const void *, uint32_t); + + int (*set_vring_num)(struct vhost_device_ctx, struct vhost_vring_state *); + int (*set_vring_addr)(struct vhost_device_ctx, struct vhost_vring_addr *); + int (*set_vring_base)(struct vhost_device_ctx, struct vhost_vring_state *); + int (*get_vring_base)(struct vhost_device_ctx, uint32_t, struct vhost_vring_state *); + + int (*set_vring_kick)(struct vhost_device_ctx, struct vhost_vring_file *); + int (*set_vring_call)(struct vhost_device_ctx, struct vhost_vring_file *); + + int (*set_backend)(struct vhost_device_ctx, struct vhost_vring_file *); + + int (*set_owner)(struct vhost_device_ctx); + int (*reset_owner)(struct vhost_device_ctx); +}; + + +struct vhost_net_device_ops const *get_virtio_net_callbacks(void); +#endif /* _VHOST_NET_CDEV_H_ */ diff --git a/src/dpdk_lib18/librte_vhost/vhost_rxtx.c b/src/dpdk_lib18/librte_vhost/vhost_rxtx.c new file mode 100755 index 00000000..ccfd82f4 --- /dev/null +++ b/src/dpdk_lib18/librte_vhost/vhost_rxtx.c @@ -0,0 +1,730 @@ +/*- + * 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 <stdint.h> +#include <linux/virtio_net.h> + +#include <rte_mbuf.h> +#include <rte_memcpy.h> +#include <rte_virtio_net.h> + +#include "vhost-net-cdev.h" + +#define MAX_PKT_BURST 32 + +/** + * This function adds buffers to the virtio devices RX virtqueue. Buffers can + * be received from the physical port or from another virtio device. A packet + * count is returned to indicate the number of packets that are succesfully + * added to the RX queue. This function works when mergeable is disabled. + */ +static inline uint32_t __attribute__((always_inline)) +virtio_dev_rx(struct virtio_net *dev, uint16_t queue_id, + struct rte_mbuf **pkts, uint32_t count) +{ + struct vhost_virtqueue *vq; + struct vring_desc *desc; + struct rte_mbuf *buff; + /* The virtio_hdr is initialised to 0. */ + struct virtio_net_hdr_mrg_rxbuf virtio_hdr = {{0, 0, 0, 0, 0, 0}, 0}; + uint64_t buff_addr = 0; + uint64_t buff_hdr_addr = 0; + uint32_t head[MAX_PKT_BURST], packet_len = 0; + uint32_t head_idx, packet_success = 0; + uint16_t avail_idx, res_cur_idx; + uint16_t res_base_idx, res_end_idx; + uint16_t free_entries; + uint8_t success = 0; + + LOG_DEBUG(VHOST_DATA, "(%"PRIu64") virtio_dev_rx()\n", dev->device_fh); + if (unlikely(queue_id != VIRTIO_RXQ)) { + LOG_DEBUG(VHOST_DATA, "mq isn't supported in this version.\n"); + return 0; + } + + vq = dev->virtqueue[VIRTIO_RXQ]; + count = (count > MAX_PKT_BURST) ? MAX_PKT_BURST : count; + + /* + * As many data cores may want access to available buffers, + * they need to be reserved. + */ + do { + res_base_idx = vq->last_used_idx_res; + avail_idx = *((volatile uint16_t *)&vq->avail->idx); + + free_entries = (avail_idx - res_base_idx); + /*check that we have enough buffers*/ + if (unlikely(count > free_entries)) + count = free_entries; + + if (count == 0) + return 0; + + res_end_idx = res_base_idx + count; + /* vq->last_used_idx_res is atomically updated. */ + /* TODO: Allow to disable cmpset if no concurrency in application. */ + success = rte_atomic16_cmpset(&vq->last_used_idx_res, + res_base_idx, res_end_idx); + } while (unlikely(success == 0)); + res_cur_idx = res_base_idx; + LOG_DEBUG(VHOST_DATA, "(%"PRIu64") Current Index %d| End Index %d\n", + dev->device_fh, res_cur_idx, res_end_idx); + + /* Prefetch available ring to retrieve indexes. */ + rte_prefetch0(&vq->avail->ring[res_cur_idx & (vq->size - 1)]); + + /* Retrieve all of the head indexes first to avoid caching issues. */ + for (head_idx = 0; head_idx < count; head_idx++) + head[head_idx] = vq->avail->ring[(res_cur_idx + head_idx) & + (vq->size - 1)]; + + /*Prefetch descriptor index. */ + rte_prefetch0(&vq->desc[head[packet_success]]); + + while (res_cur_idx != res_end_idx) { + /* Get descriptor from available ring */ + desc = &vq->desc[head[packet_success]]; + + buff = pkts[packet_success]; + + /* Convert from gpa to vva (guest physical addr -> vhost virtual addr) */ + buff_addr = gpa_to_vva(dev, desc->addr); + /* Prefetch buffer address. */ + rte_prefetch0((void *)(uintptr_t)buff_addr); + + /* Copy virtio_hdr to packet and increment buffer address */ + buff_hdr_addr = buff_addr; + packet_len = rte_pktmbuf_data_len(buff) + vq->vhost_hlen; + + /* + * If the descriptors are chained the header and data are + * placed in separate buffers. + */ + if (desc->flags & VRING_DESC_F_NEXT) { + desc->len = vq->vhost_hlen; + desc = &vq->desc[desc->next]; + /* Buffer address translation. */ + buff_addr = gpa_to_vva(dev, desc->addr); + desc->len = rte_pktmbuf_data_len(buff); + } else { + buff_addr += vq->vhost_hlen; + desc->len = packet_len; + } + + /* Update used ring with desc information */ + vq->used->ring[res_cur_idx & (vq->size - 1)].id = + head[packet_success]; + vq->used->ring[res_cur_idx & (vq->size - 1)].len = packet_len; + + /* Copy mbuf data to buffer */ + /* FIXME for sg mbuf and the case that desc couldn't hold the mbuf data */ + rte_memcpy((void *)(uintptr_t)buff_addr, + rte_pktmbuf_mtod(buff, const void *), + rte_pktmbuf_data_len(buff)); + PRINT_PACKET(dev, (uintptr_t)buff_addr, + rte_pktmbuf_data_len(buff), 0); + + res_cur_idx++; + packet_success++; + + rte_memcpy((void *)(uintptr_t)buff_hdr_addr, + (const void *)&virtio_hdr, vq->vhost_hlen); + + PRINT_PACKET(dev, (uintptr_t)buff_hdr_addr, vq->vhost_hlen, 1); + + if (res_cur_idx < res_end_idx) { + /* Prefetch descriptor index. */ + rte_prefetch0(&vq->desc[head[packet_success]]); + } + } + + rte_compiler_barrier(); + + /* Wait until it's our turn to add our buffer to the used ring. */ + while (unlikely(vq->last_used_idx != res_base_idx)) + rte_pause(); + + *(volatile uint16_t *)&vq->used->idx += count; + vq->last_used_idx = res_end_idx; + + /* Kick the guest if necessary. */ + if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT)) + eventfd_write((int)vq->kickfd, 1); + return count; +} + +static inline uint32_t __attribute__((always_inline)) +copy_from_mbuf_to_vring(struct virtio_net *dev, uint16_t res_base_idx, + uint16_t res_end_idx, struct rte_mbuf *pkt) +{ + uint32_t vec_idx = 0; + uint32_t entry_success = 0; + struct vhost_virtqueue *vq; + /* The virtio_hdr is initialised to 0. */ + struct virtio_net_hdr_mrg_rxbuf virtio_hdr = { + {0, 0, 0, 0, 0, 0}, 0}; + uint16_t cur_idx = res_base_idx; + uint64_t vb_addr = 0; + uint64_t vb_hdr_addr = 0; + uint32_t seg_offset = 0; + uint32_t vb_offset = 0; + uint32_t seg_avail; + uint32_t vb_avail; + uint32_t cpy_len, entry_len; + + if (pkt == NULL) + return 0; + + LOG_DEBUG(VHOST_DATA, "(%"PRIu64") Current Index %d| " + "End Index %d\n", + dev->device_fh, cur_idx, res_end_idx); + + /* + * Convert from gpa to vva + * (guest physical addr -> vhost virtual addr) + */ + vq = dev->virtqueue[VIRTIO_RXQ]; + vb_addr = + gpa_to_vva(dev, vq->buf_vec[vec_idx].buf_addr); + vb_hdr_addr = vb_addr; + + /* Prefetch buffer address. */ + rte_prefetch0((void *)(uintptr_t)vb_addr); + + virtio_hdr.num_buffers = res_end_idx - res_base_idx; + + LOG_DEBUG(VHOST_DATA, "(%"PRIu64") RX: Num merge buffers %d\n", + dev->device_fh, virtio_hdr.num_buffers); + + rte_memcpy((void *)(uintptr_t)vb_hdr_addr, + (const void *)&virtio_hdr, vq->vhost_hlen); + + PRINT_PACKET(dev, (uintptr_t)vb_hdr_addr, vq->vhost_hlen, 1); + + seg_avail = rte_pktmbuf_data_len(pkt); + vb_offset = vq->vhost_hlen; + vb_avail = + vq->buf_vec[vec_idx].buf_len - vq->vhost_hlen; + + entry_len = vq->vhost_hlen; + + if (vb_avail == 0) { + uint32_t desc_idx = + vq->buf_vec[vec_idx].desc_idx; + vq->desc[desc_idx].len = vq->vhost_hlen; + + if ((vq->desc[desc_idx].flags + & VRING_DESC_F_NEXT) == 0) { + /* Update used ring with desc information */ + vq->used->ring[cur_idx & (vq->size - 1)].id + = vq->buf_vec[vec_idx].desc_idx; + vq->used->ring[cur_idx & (vq->size - 1)].len + = entry_len; + + entry_len = 0; + cur_idx++; + entry_success++; + } + + vec_idx++; + vb_addr = + gpa_to_vva(dev, vq->buf_vec[vec_idx].buf_addr); + + /* Prefetch buffer address. */ + rte_prefetch0((void *)(uintptr_t)vb_addr); + vb_offset = 0; + vb_avail = vq->buf_vec[vec_idx].buf_len; + } + + cpy_len = RTE_MIN(vb_avail, seg_avail); + + while (cpy_len > 0) { + /* Copy mbuf data to vring buffer */ + rte_memcpy((void *)(uintptr_t)(vb_addr + vb_offset), + (const void *)(rte_pktmbuf_mtod(pkt, char*) + seg_offset), + cpy_len); + + PRINT_PACKET(dev, + (uintptr_t)(vb_addr + vb_offset), + cpy_len, 0); + + seg_offset += cpy_len; + vb_offset += cpy_len; + seg_avail -= cpy_len; + vb_avail -= cpy_len; + entry_len += cpy_len; + + if (seg_avail != 0) { + /* + * The virtio buffer in this vring + * entry reach to its end. + * But the segment doesn't complete. + */ + if ((vq->desc[vq->buf_vec[vec_idx].desc_idx].flags & + VRING_DESC_F_NEXT) == 0) { + /* Update used ring with desc information */ + vq->used->ring[cur_idx & (vq->size - 1)].id + = vq->buf_vec[vec_idx].desc_idx; + vq->used->ring[cur_idx & (vq->size - 1)].len + = entry_len; + entry_len = 0; + cur_idx++; + entry_success++; + } + + vec_idx++; + vb_addr = gpa_to_vva(dev, + vq->buf_vec[vec_idx].buf_addr); + vb_offset = 0; + vb_avail = vq->buf_vec[vec_idx].buf_len; + cpy_len = RTE_MIN(vb_avail, seg_avail); + } else { + /* + * This current segment complete, need continue to + * check if the whole packet complete or not. + */ + pkt = pkt->next; + if (pkt != NULL) { + /* + * There are more segments. + */ + if (vb_avail == 0) { + /* + * This current buffer from vring is + * used up, need fetch next buffer + * from buf_vec. + */ + uint32_t desc_idx = + vq->buf_vec[vec_idx].desc_idx; + vq->desc[desc_idx].len = vb_offset; + + if ((vq->desc[desc_idx].flags & + VRING_DESC_F_NEXT) == 0) { + uint16_t wrapped_idx = + cur_idx & (vq->size - 1); + /* + * Update used ring with the + * descriptor information + */ + vq->used->ring[wrapped_idx].id + = desc_idx; + vq->used->ring[wrapped_idx].len + = entry_len; + entry_success++; + entry_len = 0; + cur_idx++; + } + + /* Get next buffer from buf_vec. */ + vec_idx++; + vb_addr = gpa_to_vva(dev, + vq->buf_vec[vec_idx].buf_addr); + vb_avail = + vq->buf_vec[vec_idx].buf_len; + vb_offset = 0; + } + + seg_offset = 0; + seg_avail = rte_pktmbuf_data_len(pkt); + cpy_len = RTE_MIN(vb_avail, seg_avail); + } else { + /* + * This whole packet completes. + */ + uint32_t desc_idx = + vq->buf_vec[vec_idx].desc_idx; + vq->desc[desc_idx].len = vb_offset; + + while (vq->desc[desc_idx].flags & + VRING_DESC_F_NEXT) { + desc_idx = vq->desc[desc_idx].next; + vq->desc[desc_idx].len = 0; + } + + /* Update used ring with desc information */ + vq->used->ring[cur_idx & (vq->size - 1)].id + = vq->buf_vec[vec_idx].desc_idx; + vq->used->ring[cur_idx & (vq->size - 1)].len + = entry_len; + entry_len = 0; + cur_idx++; + entry_success++; + seg_avail = 0; + cpy_len = RTE_MIN(vb_avail, seg_avail); + } + } + } + + return entry_success; +} + +/* + * This function works for mergeable RX. + */ +static inline uint32_t __attribute__((always_inline)) +virtio_dev_merge_rx(struct virtio_net *dev, uint16_t queue_id, + struct rte_mbuf **pkts, uint32_t count) +{ + struct vhost_virtqueue *vq; + uint32_t pkt_idx = 0, entry_success = 0; + uint16_t avail_idx, res_cur_idx; + uint16_t res_base_idx, res_end_idx; + uint8_t success = 0; + + LOG_DEBUG(VHOST_DATA, "(%"PRIu64") virtio_dev_merge_rx()\n", + dev->device_fh); + if (unlikely(queue_id != VIRTIO_RXQ)) { + LOG_DEBUG(VHOST_DATA, "mq isn't supported in this version.\n"); + } + + vq = dev->virtqueue[VIRTIO_RXQ]; + count = RTE_MIN((uint32_t)MAX_PKT_BURST, count); + + if (count == 0) + return 0; + + for (pkt_idx = 0; pkt_idx < count; pkt_idx++) { + uint32_t secure_len = 0; + uint16_t need_cnt; + uint32_t vec_idx = 0; + uint32_t pkt_len = pkts[pkt_idx]->pkt_len + vq->vhost_hlen; + uint16_t i, id; + + do { + /* + * As many data cores may want access to available + * buffers, they need to be reserved. + */ + res_base_idx = vq->last_used_idx_res; + res_cur_idx = res_base_idx; + + do { + avail_idx = *((volatile uint16_t *)&vq->avail->idx); + if (unlikely(res_cur_idx == avail_idx)) { + LOG_DEBUG(VHOST_DATA, + "(%"PRIu64") Failed " + "to get enough desc from " + "vring\n", + dev->device_fh); + return pkt_idx; + } else { + uint16_t wrapped_idx = + (res_cur_idx) & (vq->size - 1); + uint32_t idx = + vq->avail->ring[wrapped_idx]; + uint8_t next_desc; + + do { + next_desc = 0; + secure_len += vq->desc[idx].len; + if (vq->desc[idx].flags & + VRING_DESC_F_NEXT) { + idx = vq->desc[idx].next; + next_desc = 1; + } + } while (next_desc); + + res_cur_idx++; + } + } while (pkt_len > secure_len); + + /* vq->last_used_idx_res is atomically updated. */ + success = rte_atomic16_cmpset(&vq->last_used_idx_res, + res_base_idx, + res_cur_idx); + } while (success == 0); + + id = res_base_idx; + need_cnt = res_cur_idx - res_base_idx; + + for (i = 0; i < need_cnt; i++, id++) { + uint16_t wrapped_idx = id & (vq->size - 1); + uint32_t idx = vq->avail->ring[wrapped_idx]; + uint8_t next_desc; + do { + next_desc = 0; + vq->buf_vec[vec_idx].buf_addr = + vq->desc[idx].addr; + vq->buf_vec[vec_idx].buf_len = + vq->desc[idx].len; + vq->buf_vec[vec_idx].desc_idx = idx; + vec_idx++; + + if (vq->desc[idx].flags & VRING_DESC_F_NEXT) { + idx = vq->desc[idx].next; + next_desc = 1; + } + } while (next_desc); + } + + res_end_idx = res_cur_idx; + + entry_success = copy_from_mbuf_to_vring(dev, res_base_idx, + res_end_idx, pkts[pkt_idx]); + + rte_compiler_barrier(); + + /* + * Wait until it's our turn to add our buffer + * to the used ring. + */ + while (unlikely(vq->last_used_idx != res_base_idx)) + rte_pause(); + + *(volatile uint16_t *)&vq->used->idx += entry_success; + vq->last_used_idx = res_end_idx; + + /* Kick the guest if necessary. */ + if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT)) + eventfd_write((int)vq->kickfd, 1); + } + + return count; +} + +uint16_t +rte_vhost_enqueue_burst(struct virtio_net *dev, uint16_t queue_id, + struct rte_mbuf **pkts, uint16_t count) +{ + if (unlikely(dev->features & (1 << VIRTIO_NET_F_MRG_RXBUF))) + return virtio_dev_merge_rx(dev, queue_id, pkts, count); + else + return virtio_dev_rx(dev, queue_id, pkts, count); +} + +uint16_t +rte_vhost_dequeue_burst(struct virtio_net *dev, uint16_t queue_id, + struct rte_mempool *mbuf_pool, struct rte_mbuf **pkts, uint16_t count) +{ + struct rte_mbuf *m, *prev; + struct vhost_virtqueue *vq; + struct vring_desc *desc; + uint64_t vb_addr = 0; + uint32_t head[MAX_PKT_BURST]; + uint32_t used_idx; + uint32_t i; + uint16_t free_entries, entry_success = 0; + uint16_t avail_idx; + + if (unlikely(queue_id != VIRTIO_TXQ)) { + LOG_DEBUG(VHOST_DATA, "mq isn't supported in this version.\n"); + return 0; + } + + vq = dev->virtqueue[VIRTIO_TXQ]; + avail_idx = *((volatile uint16_t *)&vq->avail->idx); + + /* If there are no available buffers then return. */ + if (vq->last_used_idx == avail_idx) + return 0; + + LOG_DEBUG(VHOST_DATA, "%s (%"PRIu64")\n", __func__, + dev->device_fh); + + /* Prefetch available ring to retrieve head indexes. */ + rte_prefetch0(&vq->avail->ring[vq->last_used_idx & (vq->size - 1)]); + + /*get the number of free entries in the ring*/ + free_entries = (avail_idx - vq->last_used_idx); + + free_entries = RTE_MIN(free_entries, count); + /* Limit to MAX_PKT_BURST. */ + free_entries = RTE_MIN(free_entries, MAX_PKT_BURST); + + LOG_DEBUG(VHOST_DATA, "(%"PRIu64") Buffers available %d\n", + dev->device_fh, free_entries); + /* Retrieve all of the head indexes first to avoid caching issues. */ + for (i = 0; i < free_entries; i++) + head[i] = vq->avail->ring[(vq->last_used_idx + i) & (vq->size - 1)]; + + /* Prefetch descriptor index. */ + rte_prefetch0(&vq->desc[head[entry_success]]); + rte_prefetch0(&vq->used->ring[vq->last_used_idx & (vq->size - 1)]); + + while (entry_success < free_entries) { + uint32_t vb_avail, vb_offset; + uint32_t seg_avail, seg_offset; + uint32_t cpy_len; + uint32_t seg_num = 0; + struct rte_mbuf *cur; + uint8_t alloc_err = 0; + + desc = &vq->desc[head[entry_success]]; + + /* Discard first buffer as it is the virtio header */ + desc = &vq->desc[desc->next]; + + /* Buffer address translation. */ + vb_addr = gpa_to_vva(dev, desc->addr); + /* Prefetch buffer address. */ + rte_prefetch0((void *)(uintptr_t)vb_addr); + + used_idx = vq->last_used_idx & (vq->size - 1); + + if (entry_success < (free_entries - 1)) { + /* Prefetch descriptor index. */ + rte_prefetch0(&vq->desc[head[entry_success+1]]); + rte_prefetch0(&vq->used->ring[(used_idx + 1) & (vq->size - 1)]); + } + + /* Update used index buffer information. */ + vq->used->ring[used_idx].id = head[entry_success]; + vq->used->ring[used_idx].len = 0; + + vb_offset = 0; + vb_avail = desc->len; + /* Allocate an mbuf and populate the structure. */ + m = rte_pktmbuf_alloc(mbuf_pool); + if (unlikely(m == NULL)) { + RTE_LOG(ERR, VHOST_DATA, + "Failed to allocate memory for mbuf.\n"); + return entry_success; + } + seg_offset = 0; + seg_avail = m->buf_len - RTE_PKTMBUF_HEADROOM; + cpy_len = RTE_MIN(vb_avail, seg_avail); + + PRINT_PACKET(dev, (uintptr_t)vb_addr, desc->len, 0); + + seg_num++; + cur = m; + prev = m; + while (cpy_len != 0) { + rte_memcpy((void *)(rte_pktmbuf_mtod(cur, char *) + seg_offset), + (void *)((uintptr_t)(vb_addr + vb_offset)), + cpy_len); + + seg_offset += cpy_len; + vb_offset += cpy_len; + vb_avail -= cpy_len; + seg_avail -= cpy_len; + + if (vb_avail != 0) { + /* + * The segment reachs to its end, + * while the virtio buffer in TX vring has + * more data to be copied. + */ + cur->data_len = seg_offset; + m->pkt_len += seg_offset; + /* Allocate mbuf and populate the structure. */ + cur = rte_pktmbuf_alloc(mbuf_pool); + if (unlikely(cur == NULL)) { + RTE_LOG(ERR, VHOST_DATA, "Failed to " + "allocate memory for mbuf.\n"); + rte_pktmbuf_free(m); + alloc_err = 1; + break; + } + + seg_num++; + prev->next = cur; + prev = cur; + seg_offset = 0; + seg_avail = cur->buf_len - RTE_PKTMBUF_HEADROOM; + } else { + if (desc->flags & VRING_DESC_F_NEXT) { + /* + * There are more virtio buffers in + * same vring entry need to be copied. + */ + if (seg_avail == 0) { + /* + * The current segment hasn't + * room to accomodate more + * data. + */ + cur->data_len = seg_offset; + m->pkt_len += seg_offset; + /* + * Allocate an mbuf and + * populate the structure. + */ + cur = rte_pktmbuf_alloc(mbuf_pool); + if (unlikely(cur == NULL)) { + RTE_LOG(ERR, + VHOST_DATA, + "Failed to " + "allocate memory " + "for mbuf\n"); + rte_pktmbuf_free(m); + alloc_err = 1; + break; + } + seg_num++; + prev->next = cur; + prev = cur; + seg_offset = 0; + seg_avail = cur->buf_len - RTE_PKTMBUF_HEADROOM; + } + + desc = &vq->desc[desc->next]; + + /* Buffer address translation. */ + vb_addr = gpa_to_vva(dev, desc->addr); + /* Prefetch buffer address. */ + rte_prefetch0((void *)(uintptr_t)vb_addr); + vb_offset = 0; + vb_avail = desc->len; + + PRINT_PACKET(dev, (uintptr_t)vb_addr, + desc->len, 0); + } else { + /* The whole packet completes. */ + cur->data_len = seg_offset; + m->pkt_len += seg_offset; + vb_avail = 0; + } + } + + cpy_len = RTE_MIN(vb_avail, seg_avail); + } + + if (unlikely(alloc_err == 1)) + break; + + m->nb_segs = seg_num; + + pkts[entry_success] = m; + vq->last_used_idx++; + entry_success++; + } + + rte_compiler_barrier(); + vq->used->idx += entry_success; + /* Kick guest if required. */ + if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT)) + eventfd_write((int)vq->kickfd, 1); + return entry_success; +} diff --git a/src/dpdk_lib18/librte_vhost/virtio-net.c b/src/dpdk_lib18/librte_vhost/virtio-net.c new file mode 100755 index 00000000..b041849d --- /dev/null +++ b/src/dpdk_lib18/librte_vhost/virtio-net.c @@ -0,0 +1,1163 @@ +/*- + * 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 <dirent.h> +#include <fuse/cuse_lowlevel.h> +#include <linux/vhost.h> +#include <linux/virtio_net.h> +#include <stddef.h> +#include <stdint.h> +#include <stdlib.h> +#include <sys/eventfd.h> +#include <sys/ioctl.h> +#include <sys/mman.h> +#include <unistd.h> + +#include <sys/socket.h> +#include <linux/if_tun.h> +#include <linux/if.h> + +#include <rte_ethdev.h> +#include <rte_log.h> +#include <rte_string_fns.h> +#include <rte_memory.h> +#include <rte_virtio_net.h> + +#include "vhost-net-cdev.h" +#include "eventfd_link/eventfd_link.h" + +/* + * Device linked list structure for configuration. + */ +struct virtio_net_config_ll { + struct virtio_net dev; /* Virtio device.*/ + struct virtio_net_config_ll *next; /* Next dev on linked list.*/ +}; + +const char eventfd_cdev[] = "/dev/eventfd-link"; + +/* device ops to add/remove device to/from data core. */ +static struct virtio_net_device_ops const *notify_ops; +/* root address of the linked list of managed virtio devices */ +static struct virtio_net_config_ll *ll_root; + +/* Features supported by this lib. */ +#define VHOST_SUPPORTED_FEATURES ((1ULL << VIRTIO_NET_F_MRG_RXBUF) | \ + (1ULL << VIRTIO_NET_F_CTRL_RX)) +static uint64_t VHOST_FEATURES = VHOST_SUPPORTED_FEATURES; + +/* Line size for reading maps file. */ +static const uint32_t BUFSIZE = PATH_MAX; + +/* Size of prot char array in procmap. */ +#define PROT_SZ 5 + +/* Number of elements in procmap struct. */ +#define PROCMAP_SZ 8 + +/* Structure containing information gathered from maps file. */ +struct procmap { + uint64_t va_start; /* Start virtual address in file. */ + uint64_t len; /* Size of file. */ + uint64_t pgoff; /* Not used. */ + uint32_t maj; /* Not used. */ + uint32_t min; /* Not used. */ + uint32_t ino; /* Not used. */ + char prot[PROT_SZ]; /* Not used. */ + char fname[PATH_MAX]; /* File name. */ +}; + +/* + * Converts QEMU virtual address to Vhost virtual address. This function is + * used to convert the ring addresses to our address space. + */ +static uint64_t +qva_to_vva(struct virtio_net *dev, uint64_t qemu_va) +{ + struct virtio_memory_regions *region; + uint64_t vhost_va = 0; + uint32_t regionidx = 0; + + /* Find the region where the address lives. */ + for (regionidx = 0; regionidx < dev->mem->nregions; regionidx++) { + region = &dev->mem->regions[regionidx]; + if ((qemu_va >= region->userspace_address) && + (qemu_va <= region->userspace_address + + region->memory_size)) { + vhost_va = dev->mem->mapped_address + qemu_va - + dev->mem->base_address; + break; + } + } + return vhost_va; +} + +/* + * Locate the file containing QEMU's memory space and + * map it to our address space. + */ +static int +host_memory_map(struct virtio_net *dev, struct virtio_memory *mem, + pid_t pid, uint64_t addr) +{ + struct dirent *dptr = NULL; + struct procmap procmap; + DIR *dp = NULL; + int fd; + int i; + char memfile[PATH_MAX]; + char mapfile[PATH_MAX]; + char procdir[PATH_MAX]; + char resolved_path[PATH_MAX]; + char *path = NULL; + FILE *fmap; + void *map; + uint8_t found = 0; + char line[BUFSIZE]; + char dlm[] = "- : "; + char *str, *sp, *in[PROCMAP_SZ]; + char *end = NULL; + + /* Path where mem files are located. */ + snprintf(procdir, PATH_MAX, "/proc/%u/fd/", pid); + /* Maps file used to locate mem file. */ + snprintf(mapfile, PATH_MAX, "/proc/%u/maps", pid); + + fmap = fopen(mapfile, "r"); + if (fmap == NULL) { + RTE_LOG(ERR, VHOST_CONFIG, + "(%"PRIu64") Failed to open maps file for pid %d\n", + dev->device_fh, pid); + return -1; + } + + /* Read through maps file until we find out base_address. */ + while (fgets(line, BUFSIZE, fmap) != 0) { + str = line; + errno = 0; + /* Split line into fields. */ + for (i = 0; i < PROCMAP_SZ; i++) { + in[i] = strtok_r(str, &dlm[i], &sp); + if ((in[i] == NULL) || (errno != 0)) { + fclose(fmap); + return -1; + } + str = NULL; + } + + /* Convert/Copy each field as needed. */ + procmap.va_start = strtoull(in[0], &end, 16); + if ((in[0] == '\0') || (end == NULL) || (*end != '\0') || + (errno != 0)) { + fclose(fmap); + return -1; + } + + procmap.len = strtoull(in[1], &end, 16); + if ((in[1] == '\0') || (end == NULL) || (*end != '\0') || + (errno != 0)) { + fclose(fmap); + return -1; + } + + procmap.pgoff = strtoull(in[3], &end, 16); + if ((in[3] == '\0') || (end == NULL) || (*end != '\0') || + (errno != 0)) { + fclose(fmap); + return -1; + } + + procmap.maj = strtoul(in[4], &end, 16); + if ((in[4] == '\0') || (end == NULL) || (*end != '\0') || + (errno != 0)) { + fclose(fmap); + return -1; + } + + procmap.min = strtoul(in[5], &end, 16); + if ((in[5] == '\0') || (end == NULL) || (*end != '\0') || + (errno != 0)) { + fclose(fmap); + return -1; + } + + procmap.ino = strtoul(in[6], &end, 16); + if ((in[6] == '\0') || (end == NULL) || (*end != '\0') || + (errno != 0)) { + fclose(fmap); + return -1; + } + + memcpy(&procmap.prot, in[2], PROT_SZ); + memcpy(&procmap.fname, in[7], PATH_MAX); + + if (procmap.va_start == addr) { + procmap.len = procmap.len - procmap.va_start; + found = 1; + break; + } + } + fclose(fmap); + + if (!found) { + RTE_LOG(ERR, VHOST_CONFIG, + "(%"PRIu64") Failed to find memory file in pid %d maps file\n", + dev->device_fh, pid); + return -1; + } + + /* Find the guest memory file among the process fds. */ + dp = opendir(procdir); + if (dp == NULL) { + RTE_LOG(ERR, VHOST_CONFIG, + "(%"PRIu64") Cannot open pid %d process directory\n", + dev->device_fh, pid); + return -1; + } + + found = 0; + + /* Read the fd directory contents. */ + while (NULL != (dptr = readdir(dp))) { + snprintf(memfile, PATH_MAX, "/proc/%u/fd/%s", + pid, dptr->d_name); + path = realpath(memfile, resolved_path); + if ((path == NULL) && (strlen(resolved_path) == 0)) { + RTE_LOG(ERR, VHOST_CONFIG, + "(%"PRIu64") Failed to resolve fd directory\n", + dev->device_fh); + closedir(dp); + return -1; + } + if (strncmp(resolved_path, procmap.fname, + strnlen(procmap.fname, PATH_MAX)) == 0) { + found = 1; + break; + } + } + + closedir(dp); + + if (found == 0) { + RTE_LOG(ERR, VHOST_CONFIG, + "(%"PRIu64") Failed to find memory file for pid %d\n", + dev->device_fh, pid); + return -1; + } + /* Open the shared memory file and map the memory into this process. */ + fd = open(memfile, O_RDWR); + + if (fd == -1) { + RTE_LOG(ERR, VHOST_CONFIG, + "(%"PRIu64") Failed to open %s for pid %d\n", + dev->device_fh, memfile, pid); + return -1; + } + + map = mmap(0, (size_t)procmap.len, PROT_READ|PROT_WRITE, + MAP_POPULATE|MAP_SHARED, fd, 0); + close(fd); + + if (map == MAP_FAILED) { + RTE_LOG(ERR, VHOST_CONFIG, + "(%"PRIu64") Error mapping the file %s for pid %d\n", + dev->device_fh, memfile, pid); + return -1; + } + + /* Store the memory address and size in the device data structure */ + mem->mapped_address = (uint64_t)(uintptr_t)map; + mem->mapped_size = procmap.len; + + LOG_DEBUG(VHOST_CONFIG, + "(%"PRIu64") Mem File: %s->%s - Size: %llu - VA: %p\n", + dev->device_fh, + memfile, resolved_path, + (unsigned long long)mem->mapped_size, map); + + return 0; +} + +/* + * Retrieves an entry from the devices configuration linked list. + */ +static struct virtio_net_config_ll * +get_config_ll_entry(struct vhost_device_ctx ctx) +{ + struct virtio_net_config_ll *ll_dev = ll_root; + + /* Loop through linked list until the device_fh is found. */ + while (ll_dev != NULL) { + if (ll_dev->dev.device_fh == ctx.fh) + return ll_dev; + ll_dev = ll_dev->next; + } + + return NULL; +} + +/* + * Searches the configuration core linked list and + * retrieves the device if it exists. + */ +static struct virtio_net * +get_device(struct vhost_device_ctx ctx) +{ + struct virtio_net_config_ll *ll_dev; + + ll_dev = get_config_ll_entry(ctx); + + if (ll_dev) + return &ll_dev->dev; + + RTE_LOG(ERR, VHOST_CONFIG, + "(%"PRIu64") Device not found in linked list.\n", ctx.fh); + return NULL; +} + +/* + * Add entry containing a device to the device configuration linked list. + */ +static void +add_config_ll_entry(struct virtio_net_config_ll *new_ll_dev) +{ + struct virtio_net_config_ll *ll_dev = ll_root; + + /* If ll_dev == NULL then this is the first device so go to else */ + if (ll_dev) { + /* If the 1st device_fh != 0 then we insert our device here. */ + if (ll_dev->dev.device_fh != 0) { + new_ll_dev->dev.device_fh = 0; + new_ll_dev->next = ll_dev; + ll_root = new_ll_dev; + } else { + /* + * Increment through the ll until we find un unused + * device_fh. Insert the device at that entry. + */ + while ((ll_dev->next != NULL) && + (ll_dev->dev.device_fh == + (ll_dev->next->dev.device_fh - 1))) + ll_dev = ll_dev->next; + + new_ll_dev->dev.device_fh = ll_dev->dev.device_fh + 1; + new_ll_dev->next = ll_dev->next; + ll_dev->next = new_ll_dev; + } + } else { + ll_root = new_ll_dev; + ll_root->dev.device_fh = 0; + } + +} + +/* + * Unmap any memory, close any file descriptors and + * free any memory owned by a device. + */ +static void +cleanup_device(struct virtio_net *dev) +{ + /* Unmap QEMU memory file if mapped. */ + if (dev->mem) { + munmap((void *)(uintptr_t)dev->mem->mapped_address, + (size_t)dev->mem->mapped_size); + free(dev->mem); + } + + /* Close any event notifiers opened by device. */ + if (dev->virtqueue[VIRTIO_RXQ]->callfd) + close((int)dev->virtqueue[VIRTIO_RXQ]->callfd); + if (dev->virtqueue[VIRTIO_RXQ]->kickfd) + close((int)dev->virtqueue[VIRTIO_RXQ]->kickfd); + if (dev->virtqueue[VIRTIO_TXQ]->callfd) + close((int)dev->virtqueue[VIRTIO_TXQ]->callfd); + if (dev->virtqueue[VIRTIO_TXQ]->kickfd) + close((int)dev->virtqueue[VIRTIO_TXQ]->kickfd); +} + +/* + * Release virtqueues and device memory. + */ +static void +free_device(struct virtio_net_config_ll *ll_dev) +{ + /* Free any malloc'd memory */ + free(ll_dev->dev.virtqueue[VIRTIO_RXQ]); + free(ll_dev->dev.virtqueue[VIRTIO_TXQ]); + free(ll_dev); +} + +/* + * Remove an entry from the device configuration linked list. + */ +static struct virtio_net_config_ll * +rm_config_ll_entry(struct virtio_net_config_ll *ll_dev, + struct virtio_net_config_ll *ll_dev_last) +{ + /* First remove the device and then clean it up. */ + if (ll_dev == ll_root) { + ll_root = ll_dev->next; + cleanup_device(&ll_dev->dev); + free_device(ll_dev); + return ll_root; + } else { + if (likely(ll_dev_last != NULL)) { + ll_dev_last->next = ll_dev->next; + cleanup_device(&ll_dev->dev); + free_device(ll_dev); + return ll_dev_last->next; + } else { + cleanup_device(&ll_dev->dev); + free_device(ll_dev); + RTE_LOG(ERR, VHOST_CONFIG, + "Remove entry from config_ll failed\n"); + return NULL; + } + } +} + +/* + * Initialise all variables in device structure. + */ +static void +init_device(struct virtio_net *dev) +{ + uint64_t vq_offset; + + /* + * Virtqueues have already been malloced so + * we don't want to set them to NULL. + */ + vq_offset = offsetof(struct virtio_net, mem); + + /* Set everything to 0. */ + memset((void *)(uintptr_t)((uint64_t)(uintptr_t)dev + vq_offset), 0, + (sizeof(struct virtio_net) - (size_t)vq_offset)); + memset(dev->virtqueue[VIRTIO_RXQ], 0, sizeof(struct vhost_virtqueue)); + memset(dev->virtqueue[VIRTIO_TXQ], 0, sizeof(struct vhost_virtqueue)); + + /* Backends are set to -1 indicating an inactive device. */ + dev->virtqueue[VIRTIO_RXQ]->backend = VIRTIO_DEV_STOPPED; + dev->virtqueue[VIRTIO_TXQ]->backend = VIRTIO_DEV_STOPPED; +} + +/* + * Function is called from the CUSE open function. The device structure is + * initialised and a new entry is added to the device configuration linked + * list. + */ +static int +new_device(struct vhost_device_ctx ctx) +{ + struct virtio_net_config_ll *new_ll_dev; + struct vhost_virtqueue *virtqueue_rx, *virtqueue_tx; + + /* Setup device and virtqueues. */ + new_ll_dev = malloc(sizeof(struct virtio_net_config_ll)); + if (new_ll_dev == NULL) { + RTE_LOG(ERR, VHOST_CONFIG, + "(%"PRIu64") Failed to allocate memory for dev.\n", + ctx.fh); + return -1; + } + + virtqueue_rx = malloc(sizeof(struct vhost_virtqueue)); + if (virtqueue_rx == NULL) { + free(new_ll_dev); + RTE_LOG(ERR, VHOST_CONFIG, + "(%"PRIu64") Failed to allocate memory for rxq.\n", + ctx.fh); + return -1; + } + + virtqueue_tx = malloc(sizeof(struct vhost_virtqueue)); + if (virtqueue_tx == NULL) { + free(virtqueue_rx); + free(new_ll_dev); + RTE_LOG(ERR, VHOST_CONFIG, + "(%"PRIu64") Failed to allocate memory for txq.\n", + ctx.fh); + return -1; + } + + new_ll_dev->dev.virtqueue[VIRTIO_RXQ] = virtqueue_rx; + new_ll_dev->dev.virtqueue[VIRTIO_TXQ] = virtqueue_tx; + + /* Initialise device and virtqueues. */ + init_device(&new_ll_dev->dev); + + new_ll_dev->next = NULL; + + /* Add entry to device configuration linked list. */ + add_config_ll_entry(new_ll_dev); + + return new_ll_dev->dev.device_fh; +} + +/* + * Function is called from the CUSE release function. This function will + * cleanup the device and remove it from device configuration linked list. + */ +static void +destroy_device(struct vhost_device_ctx ctx) +{ + struct virtio_net_config_ll *ll_dev_cur_ctx, *ll_dev_last = NULL; + struct virtio_net_config_ll *ll_dev_cur = ll_root; + + /* Find the linked list entry for the device to be removed. */ + ll_dev_cur_ctx = get_config_ll_entry(ctx); + while (ll_dev_cur != NULL) { + /* + * If the device is found or + * a device that doesn't exist is found then it is removed. + */ + if (ll_dev_cur == ll_dev_cur_ctx) { + /* + * If the device is running on a data core then call + * the function to remove it from the data core. + */ + if ((ll_dev_cur->dev.flags & VIRTIO_DEV_RUNNING)) + notify_ops->destroy_device(&(ll_dev_cur->dev)); + ll_dev_cur = rm_config_ll_entry(ll_dev_cur, + ll_dev_last); + } else { + ll_dev_last = ll_dev_cur; + ll_dev_cur = ll_dev_cur->next; + } + } +} + +/* + * Called from CUSE IOCTL: VHOST_SET_OWNER + * This function just returns success at the moment unless + * the device hasn't been initialised. + */ +static int +set_owner(struct vhost_device_ctx ctx) +{ + struct virtio_net *dev; + + dev = get_device(ctx); + if (dev == NULL) + return -1; + + return 0; +} + +/* + * Called from CUSE IOCTL: VHOST_RESET_OWNER + */ +static int +reset_owner(struct vhost_device_ctx ctx) +{ + struct virtio_net_config_ll *ll_dev; + + ll_dev = get_config_ll_entry(ctx); + + cleanup_device(&ll_dev->dev); + init_device(&ll_dev->dev); + + return 0; +} + +/* + * Called from CUSE IOCTL: VHOST_GET_FEATURES + * The features that we support are requested. + */ +static int +get_features(struct vhost_device_ctx ctx, uint64_t *pu) +{ + struct virtio_net *dev; + + dev = get_device(ctx); + if (dev == NULL) + return -1; + + /* Send our supported features. */ + *pu = VHOST_FEATURES; + return 0; +} + +/* + * Called from CUSE IOCTL: VHOST_SET_FEATURES + * We receive the negotiated features supported by us and the virtio device. + */ +static int +set_features(struct vhost_device_ctx ctx, uint64_t *pu) +{ + struct virtio_net *dev; + + dev = get_device(ctx); + if (dev == NULL) + return -1; + if (*pu & ~VHOST_FEATURES) + return -1; + + /* Store the negotiated feature list for the device. */ + dev->features = *pu; + + /* Set the vhost_hlen depending on if VIRTIO_NET_F_MRG_RXBUF is set. */ + if (dev->features & (1 << VIRTIO_NET_F_MRG_RXBUF)) { + LOG_DEBUG(VHOST_CONFIG, + "(%"PRIu64") Mergeable RX buffers enabled\n", + dev->device_fh); + dev->virtqueue[VIRTIO_RXQ]->vhost_hlen = + sizeof(struct virtio_net_hdr_mrg_rxbuf); + dev->virtqueue[VIRTIO_TXQ]->vhost_hlen = + sizeof(struct virtio_net_hdr_mrg_rxbuf); + } else { + LOG_DEBUG(VHOST_CONFIG, + "(%"PRIu64") Mergeable RX buffers disabled\n", + dev->device_fh); + dev->virtqueue[VIRTIO_RXQ]->vhost_hlen = + sizeof(struct virtio_net_hdr); + dev->virtqueue[VIRTIO_TXQ]->vhost_hlen = + sizeof(struct virtio_net_hdr); + } + return 0; +} + + +/* + * Called from CUSE IOCTL: VHOST_SET_MEM_TABLE + * This function creates and populates the memory structure for the device. + * This includes storing offsets used to translate buffer addresses. + */ +static int +set_mem_table(struct vhost_device_ctx ctx, const void *mem_regions_addr, + uint32_t nregions) +{ + struct virtio_net *dev; + struct vhost_memory_region *mem_regions; + struct virtio_memory *mem; + uint64_t size = offsetof(struct vhost_memory, regions); + uint32_t regionidx, valid_regions; + + dev = get_device(ctx); + if (dev == NULL) + return -1; + + if (dev->mem) { + munmap((void *)(uintptr_t)dev->mem->mapped_address, + (size_t)dev->mem->mapped_size); + free(dev->mem); + } + + /* Malloc the memory structure depending on the number of regions. */ + mem = calloc(1, sizeof(struct virtio_memory) + + (sizeof(struct virtio_memory_regions) * nregions)); + if (mem == NULL) { + RTE_LOG(ERR, VHOST_CONFIG, + "(%"PRIu64") Failed to allocate memory for dev->mem.\n", + dev->device_fh); + return -1; + } + + mem->nregions = nregions; + + mem_regions = (void *)(uintptr_t) + ((uint64_t)(uintptr_t)mem_regions_addr + size); + + for (regionidx = 0; regionidx < mem->nregions; regionidx++) { + /* Populate the region structure for each region. */ + mem->regions[regionidx].guest_phys_address = + mem_regions[regionidx].guest_phys_addr; + mem->regions[regionidx].guest_phys_address_end = + mem->regions[regionidx].guest_phys_address + + mem_regions[regionidx].memory_size; + mem->regions[regionidx].memory_size = + mem_regions[regionidx].memory_size; + mem->regions[regionidx].userspace_address = + mem_regions[regionidx].userspace_addr; + + LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") REGION: %u - GPA: %p - QEMU VA: %p - SIZE (%"PRIu64")\n", dev->device_fh, + regionidx, + (void *)(uintptr_t)mem->regions[regionidx].guest_phys_address, + (void *)(uintptr_t)mem->regions[regionidx].userspace_address, + mem->regions[regionidx].memory_size); + + /*set the base address mapping*/ + if (mem->regions[regionidx].guest_phys_address == 0x0) { + mem->base_address = + mem->regions[regionidx].userspace_address; + /* Map VM memory file */ + if (host_memory_map(dev, mem, ctx.pid, + mem->base_address) != 0) { + free(mem); + return -1; + } + } + } + + /* Check that we have a valid base address. */ + if (mem->base_address == 0) { + RTE_LOG(ERR, VHOST_CONFIG, "(%"PRIu64") Failed to find base address of qemu memory file.\n", dev->device_fh); + free(mem); + return -1; + } + + /* + * Check if all of our regions have valid mappings. + * Usually one does not exist in the QEMU memory file. + */ + valid_regions = mem->nregions; + for (regionidx = 0; regionidx < mem->nregions; regionidx++) { + if ((mem->regions[regionidx].userspace_address < + mem->base_address) || + (mem->regions[regionidx].userspace_address > + (mem->base_address + mem->mapped_size))) + valid_regions--; + } + + /* + * If a region does not have a valid mapping, + * we rebuild our memory struct to contain only valid entries. + */ + if (valid_regions != mem->nregions) { + LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") Not all memory regions exist in the QEMU mem file. Re-populating mem structure\n", + dev->device_fh); + + /* + * Re-populate the memory structure with only valid regions. + * Invalid regions are over-written with memmove. + */ + valid_regions = 0; + + for (regionidx = mem->nregions; 0 != regionidx--;) { + if ((mem->regions[regionidx].userspace_address < + mem->base_address) || + (mem->regions[regionidx].userspace_address > + (mem->base_address + mem->mapped_size))) { + memmove(&mem->regions[regionidx], + &mem->regions[regionidx + 1], + sizeof(struct virtio_memory_regions) * + valid_regions); + } else { + valid_regions++; + } + } + } + mem->nregions = valid_regions; + dev->mem = mem; + + /* + * Calculate the address offset for each region. + * This offset is used to identify the vhost virtual address + * corresponding to a QEMU guest physical address. + */ + for (regionidx = 0; regionidx < dev->mem->nregions; regionidx++) { + dev->mem->regions[regionidx].address_offset = + dev->mem->regions[regionidx].userspace_address - + dev->mem->base_address + + dev->mem->mapped_address - + dev->mem->regions[regionidx].guest_phys_address; + + } + return 0; +} + +/* + * Called from CUSE IOCTL: VHOST_SET_VRING_NUM + * The virtio device sends us the size of the descriptor ring. + */ +static int +set_vring_num(struct vhost_device_ctx ctx, struct vhost_vring_state *state) +{ + struct virtio_net *dev; + + dev = get_device(ctx); + if (dev == NULL) + return -1; + + /* State->index refers to the queue index. The txq is 1, rxq is 0. */ + dev->virtqueue[state->index]->size = state->num; + + return 0; +} + +/* + * Called from CUSE IOCTL: VHOST_SET_VRING_ADDR + * The virtio device sends us the desc, used and avail ring addresses. + * This function then converts these to our address space. + */ +static int +set_vring_addr(struct vhost_device_ctx ctx, struct vhost_vring_addr *addr) +{ + struct virtio_net *dev; + struct vhost_virtqueue *vq; + + dev = get_device(ctx); + if (dev == NULL) + return -1; + + /* addr->index refers to the queue index. The txq 1, rxq is 0. */ + vq = dev->virtqueue[addr->index]; + + /* The addresses are converted from QEMU virtual to Vhost virtual. */ + vq->desc = (struct vring_desc *)(uintptr_t)qva_to_vva(dev, + addr->desc_user_addr); + if (vq->desc == 0) { + RTE_LOG(ERR, VHOST_CONFIG, + "(%"PRIu64") Failed to find desc ring address.\n", + dev->device_fh); + return -1; + } + + vq->avail = (struct vring_avail *)(uintptr_t)qva_to_vva(dev, + addr->avail_user_addr); + if (vq->avail == 0) { + RTE_LOG(ERR, VHOST_CONFIG, + "(%"PRIu64") Failed to find avail ring address.\n", + dev->device_fh); + return -1; + } + + vq->used = (struct vring_used *)(uintptr_t)qva_to_vva(dev, + addr->used_user_addr); + if (vq->used == 0) { + RTE_LOG(ERR, VHOST_CONFIG, + "(%"PRIu64") Failed to find used ring address.\n", + dev->device_fh); + return -1; + } + + LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") mapped address desc: %p\n", + dev->device_fh, vq->desc); + LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") mapped address avail: %p\n", + dev->device_fh, vq->avail); + LOG_DEBUG(VHOST_CONFIG, "(%"PRIu64") mapped address used: %p\n", + dev->device_fh, vq->used); + + return 0; +} + +/* + * Called from CUSE IOCTL: VHOST_SET_VRING_BASE + * The virtio device sends us the available ring last used index. + */ +static int +set_vring_base(struct vhost_device_ctx ctx, struct vhost_vring_state *state) +{ + struct virtio_net *dev; + + dev = get_device(ctx); + if (dev == NULL) + return -1; + + /* State->index refers to the queue index. The txq is 1, rxq is 0. */ + dev->virtqueue[state->index]->last_used_idx = state->num; + dev->virtqueue[state->index]->last_used_idx_res = state->num; + + return 0; +} + +/* + * Called from CUSE IOCTL: VHOST_GET_VRING_BASE + * We send the virtio device our available ring last used index. + */ +static int +get_vring_base(struct vhost_device_ctx ctx, uint32_t index, + struct vhost_vring_state *state) +{ + struct virtio_net *dev; + + dev = get_device(ctx); + if (dev == NULL) + return -1; + + state->index = index; + /* State->index refers to the queue index. The txq is 1, rxq is 0. */ + state->num = dev->virtqueue[state->index]->last_used_idx; + + return 0; +} + +/* + * This function uses the eventfd_link kernel module to copy an eventfd file + * descriptor provided by QEMU in to our process space. + */ +static int +eventfd_copy(struct virtio_net *dev, struct eventfd_copy *eventfd_copy) +{ + int eventfd_link, ret; + + /* Open the character device to the kernel module. */ + eventfd_link = open(eventfd_cdev, O_RDWR); + if (eventfd_link < 0) { + RTE_LOG(ERR, VHOST_CONFIG, + "(%"PRIu64") eventfd_link module is not loaded\n", + dev->device_fh); + return -1; + } + + /* Call the IOCTL to copy the eventfd. */ + ret = ioctl(eventfd_link, EVENTFD_COPY, eventfd_copy); + close(eventfd_link); + + if (ret < 0) { + RTE_LOG(ERR, VHOST_CONFIG, + "(%"PRIu64") EVENTFD_COPY ioctl failed\n", + dev->device_fh); + return -1; + } + + return 0; +} + +/* + * Called from CUSE IOCTL: VHOST_SET_VRING_CALL + * The virtio device sends an eventfd to interrupt the guest. This fd gets + * copied into our process space. + */ +static int +set_vring_call(struct vhost_device_ctx ctx, struct vhost_vring_file *file) +{ + struct virtio_net *dev; + struct eventfd_copy eventfd_kick; + struct vhost_virtqueue *vq; + + dev = get_device(ctx); + if (dev == NULL) + return -1; + + /* file->index refers to the queue index. The txq is 1, rxq is 0. */ + vq = dev->virtqueue[file->index]; + + if (vq->kickfd) + close((int)vq->kickfd); + + /* Populate the eventfd_copy structure and call eventfd_copy. */ + vq->kickfd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC); + eventfd_kick.source_fd = vq->kickfd; + eventfd_kick.target_fd = file->fd; + eventfd_kick.target_pid = ctx.pid; + + if (eventfd_copy(dev, &eventfd_kick)) + return -1; + + return 0; +} + +/* + * Called from CUSE IOCTL: VHOST_SET_VRING_KICK + * The virtio device sends an eventfd that it can use to notify us. + * This fd gets copied into our process space. + */ +static int +set_vring_kick(struct vhost_device_ctx ctx, struct vhost_vring_file *file) +{ + struct virtio_net *dev; + struct eventfd_copy eventfd_call; + struct vhost_virtqueue *vq; + + dev = get_device(ctx); + if (dev == NULL) + return -1; + + /* file->index refers to the queue index. The txq is 1, rxq is 0. */ + vq = dev->virtqueue[file->index]; + + if (vq->callfd) + close((int)vq->callfd); + + /* Populate the eventfd_copy structure and call eventfd_copy. */ + vq->callfd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC); + eventfd_call.source_fd = vq->callfd; + eventfd_call.target_fd = file->fd; + eventfd_call.target_pid = ctx.pid; + + if (eventfd_copy(dev, &eventfd_call)) + return -1; + + return 0; +} + +/* + * Function to get the tap device name from the provided file descriptor and + * save it in the device structure. + */ +static int +get_ifname(struct virtio_net *dev, int tap_fd, int pid) +{ + struct eventfd_copy fd_tap; + struct ifreq ifr; + uint32_t size, ifr_size; + int ret; + + fd_tap.source_fd = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC); + fd_tap.target_fd = tap_fd; + fd_tap.target_pid = pid; + + if (eventfd_copy(dev, &fd_tap)) + return -1; + + ret = ioctl(fd_tap.source_fd, TUNGETIFF, &ifr); + + if (close(fd_tap.source_fd) < 0) + RTE_LOG(ERR, VHOST_CONFIG, + "(%"PRIu64") fd close failed\n", + dev->device_fh); + + if (ret >= 0) { + ifr_size = strnlen(ifr.ifr_name, sizeof(ifr.ifr_name)); + size = ifr_size > sizeof(dev->ifname) ? + sizeof(dev->ifname) : ifr_size; + + strncpy(dev->ifname, ifr.ifr_name, size); + } else + RTE_LOG(ERR, VHOST_CONFIG, + "(%"PRIu64") TUNGETIFF ioctl failed\n", + dev->device_fh); + + return 0; +} + +/* + * Called from CUSE IOCTL: VHOST_NET_SET_BACKEND + * To complete device initialisation when the virtio driver is loaded, + * we are provided with a valid fd for a tap device (not used by us). + * If this happens then we can add the device to a data core. + * When the virtio driver is removed we get fd=-1. + * At that point we remove the device from the data core. + * The device will still exist in the device configuration linked list. + */ +static int +set_backend(struct vhost_device_ctx ctx, struct vhost_vring_file *file) +{ + struct virtio_net *dev; + + dev = get_device(ctx); + if (dev == NULL) + return -1; + + /* file->index refers to the queue index. The txq is 1, rxq is 0. */ + dev->virtqueue[file->index]->backend = file->fd; + + /* + * If the device isn't already running and both backend fds are set, + * we add the device. + */ + if (!(dev->flags & VIRTIO_DEV_RUNNING)) { + if (((int)dev->virtqueue[VIRTIO_TXQ]->backend != VIRTIO_DEV_STOPPED) && + ((int)dev->virtqueue[VIRTIO_RXQ]->backend != VIRTIO_DEV_STOPPED)) { + get_ifname(dev, file->fd, ctx.pid); + return notify_ops->new_device(dev); + } + /* Otherwise we remove it. */ + } else + if (file->fd == VIRTIO_DEV_STOPPED) + notify_ops->destroy_device(dev); + return 0; +} + +/* + * Function pointers are set for the device operations to allow CUSE to call + * functions when an IOCTL, device_add or device_release is received. + */ +static const struct vhost_net_device_ops vhost_device_ops = { + .new_device = new_device, + .destroy_device = destroy_device, + + .get_features = get_features, + .set_features = set_features, + + .set_mem_table = set_mem_table, + + .set_vring_num = set_vring_num, + .set_vring_addr = set_vring_addr, + .set_vring_base = set_vring_base, + .get_vring_base = get_vring_base, + + .set_vring_kick = set_vring_kick, + .set_vring_call = set_vring_call, + + .set_backend = set_backend, + + .set_owner = set_owner, + .reset_owner = reset_owner, +}; + +/* + * Called by main to setup callbacks when registering CUSE device. + */ +struct vhost_net_device_ops const * +get_virtio_net_callbacks(void) +{ + return &vhost_device_ops; +} + +int rte_vhost_enable_guest_notification(struct virtio_net *dev, + uint16_t queue_id, int enable) +{ + if (enable) { + RTE_LOG(ERR, VHOST_CONFIG, + "guest notification isn't supported.\n"); + return -1; + } + + dev->virtqueue[queue_id]->used->flags = + enable ? 0 : VRING_USED_F_NO_NOTIFY; + return 0; +} + +uint64_t rte_vhost_feature_get(void) +{ + return VHOST_FEATURES; +} + +int rte_vhost_feature_disable(uint64_t feature_mask) +{ + VHOST_FEATURES = VHOST_FEATURES & ~feature_mask; + return 0; +} + +int rte_vhost_feature_enable(uint64_t feature_mask) +{ + if ((feature_mask & VHOST_SUPPORTED_FEATURES) == feature_mask) { + VHOST_FEATURES = VHOST_FEATURES | feature_mask; + return 0; + } + return -1; +} + +/* + * Register ops so that we can add/remove device to data core. + */ +int +rte_vhost_driver_callback_register(struct virtio_net_device_ops const * const ops) +{ + notify_ops = ops; + + return 0; +} |