usb整体策略的优化设计

[busuanzi] 2022-04-28

字数统计: 3.8k字 | 阅读时长≈ 22分

【前置】需求分析

设计

【模块】页面

前台负责

【交互】页面&后台

通过配置文件交互

/home/kylin-ksvd/.ksvd/settings.${policy_uuid}

删除KSVD_NATIVE_USB_NUM KSVD_NATIVE_USB_MODE 字段
新增KSVD_NATIVE_USB_3 KSVD_NATIVE_USB_2 两个字段

/home/kylin-ksvd/.ksvd/usbSettings.${policy_uuid}

对应前台配置绑定通道为 channel_id字段
对应前台配置 max_int_pkg_size字段

eg:
{
“name”:”fig”,
“lvl”:9,
“vid”:”0x735f”,
“pid”:”0x1302”,
“usb_scsi_readonly”:false,
“redirect_mode_usb”:true,
“usb_redirect_on_connect”:true,
“usb_redirect_auto”:true,
“usb_reset”:1,
“usb_scsi_fat”:false,
“redirect_mode_uvc”:false,
“uvc_frame_ctl_ratio”:100，
“channel_id”:2,
“max_int_pkg_size”:1024
}

升级

需要考虑字段变动引起的省级问题

【模块】后台

需要考虑配置文件的变动，读写和消息传递

【交互】后台&&客户端

交互消息结构改动

考虑是否变动

兼容性

如果有修改，需要考虑兼容性问题

【交互】后台&&qemu（uniqb-runatime）

应该不用修改，交互方面应该只是传配置文件
文件 /home/kylin-ksvd/.ksvd/settings.${policy_uuid}

【模块】客户端

需要确定是否受到影响

【模块】qemu(uniqb-runtime)

需要先弄清MIPS X86_64 AARCH64 区别于各自的参数
参数来自于Get_Mach_Arch,但是没找到定义，不过找到以下arch相关的东西,推测平台不止3个
KSVD/ThirdParty/qemu/qemu-2.3.0/target-arm/kvm.c:155:int kvm_arch_init(MachineState *ms, KVMState *s)
KSVD/ThirdParty/qemu/qemu-2.3.0/target-mips/kvm.c:43:int kvm_arch_init(MachineState *ms, KVMState *s)
KSVD/ThirdParty/qemu/qemu-2.3.0/target-s390x/kvm.c:245:int kvm_arch_init(MachineState *ms, KVMState *s)
KSVD/ThirdParty/qemu/qemu-2.3.0/target-ppc/kvm.c:98:int kvm_arch_init(MachineState *ms, KVMState *s)
KSVD/ThirdParty/qemu/qemu-2.3.0/target-i386/kvm.c:843:int kvm_arch_init(MachineState *ms, KVMState *s)

关注参数

那么先列出所有平台下的参数

condtion 1: !(cfg.os_type == UNIQB_MACHTYPE_OS_WIN10 && runmode_installing)
condtion 2: cfg.usb_degrade

MODE	参数	X86_64	ARM	MIPS	其他
3.0	-device nec-usb-xhci,id=xhci	Y	Y	Y	Y
	,bus=pci, addr=0x6	N	N	Y	N
	-device usb-host,id=hostdev0, bus=xhci.0	N	N	Y	N
	{if(condtion 1) -device usb-table,bus=xhci.0	Y	N	N	N
	-device usb-redir,chardev=usbredirchardev%d,id=usbredirdev%d	Y	Y	Y	Y
	,{if (condtion 2) filter={string} else ,filter-path={path}},usb_degrade={if(condtion 2) true else false}	Y	Y	Y	Y
2.0	-device ich9-usb-ehci1,id=usb	Y	Y	Y	Y
	,bus=pci, addr=0x4.x07	N	N	Y	N
	-devcie ich9-usb-uhci{n/2+1},masterbus=usb.0,firstport={n}{if (n == 1),multifunction=on}	Y	Y	Y	Y
	,bus=pci,addr=0x4.0x{n/2}	N	N	Y	N
	-device usb-redir,chardev=usbredirchardev%d,id=usbredirdev%d	Y	Y	Y	Y
	,{if (condtion 2) filter={string} else ,filter-path={path}},usb_degrade={if(condtion 2) true else false}	Y	Y	Y	Y
	,bus=usb.0,port={n}	N	N	Y	N

对比可以得出以下结论

MIPS 的代码，通常指定了bus和addr,port参数
-device usb-redir中 3.0模式下MIPS没有指定有些奇怪
X86 在非win10模式下，指定了-device usb-table,bus=xhci.0 参数
需要弄清pci设备bus和addr的指定【详见】qemu qdev初步解析
usb-table [x86]设备，是hid设备。只有安装模式下开启，怀疑是guesttool安装之前，鼠标键盘使用的
usb-host [MIPS]设备，看代码是直接基于libusb的设备，可以直接使用qemu运行机器上的外舍，出现在这里，也不知道是什么用处

分析：
经过目前分析,MIPS平台下，可能由于PCI插槽的资源比较紧缺，所以这里共用了插槽
由于uhci和ehci共用的pci同一个addr，所以最多能支持7个uhci（可能存在偏差）好在我们目前最多也不过需要那么多，但是之后如果进行32通道的研究，这里就要注意了

我们对照一个qemu进程来看

/usr/libexec/qemu-kvm 
-smbios type=1,manufacturer=Kylin,product=kylin,version=1,family=KSVD,serial=1cc9679a60e119d1fe8e962db7c2614e 
-smbios type=2,manufacturer=Kylin,product=kylin,version=1,serial=1cc9679a60e119d1fe8e962db7c2614e 
-smbios type=3,manufacturer=Kylin,version=1,serial=1cc9679a60e119d1fe8e962db7c2614e 
-smbios type=17,manufacturer=Kylin 
-uuid 1cc9679a-60e1-39d1-fe8e-962db7c2614e 
-global PIIX4_PM.disable_s3=1 
-global PIIX4_PM.disable_s4=1 
-machine accel=kvm:tcg 
-L /usr/share/qemu-kvm 
-rtc base=localtime,clock=host,driftfix=slew 
-usb 
-device usb-tablet 
-monitor stdio 
-nodefaults 
-m 4096 -
smp 4,maxcpus=4,sockets=2,cores=2 
-M pc 
-cpu Skylake-Client,hv_time,hv_relaxed,hv_vapic,hv_spinlocks=0x1fff 
-device virtio-balloon 
-tb-size 2 
-drive if=none,id=ide1-cd0,media=cdrom,snapshot=off,aio=threads 
-device ide-drive,drive=ide1-cd0,bus=ide.1,unit=0,ver=0.12.1 
-boot c,menu=on,splash=/usr/lib/ksvd/etc/bootsplash.jpg,splash-time=800 
-vga qxl 
-global qxl-vga.vgamem_mb=32 -global qxl-vga.revision=4 
-global qxl-vga.ram_size=134217728 
-global qxl-vga.vram_size=134217728 
-device qxl,id=video1,vram_size=33554432 
-device virtio-serial 
-chardev spicevmc,name=vdagent,id=vdagent 
-device virtserialport,chardev=vdagent,name=com.redhat.spice.0 
-drive if=none,id=virtio0-hd0,file=/home/kylin-ksvd/ksvd-orgs/org-0/users/0local/jzt/win7-yjr/DELTA.IMG,cache=unsafe,aio=threads,snapshot=off,throttling.bps-read=0,throttling.bps-write=0 
-device pci-bridge,id=pci.3,chassis_nr=2,bus=pci.0,addr=0x1e 
-device virtio-scsi-pci,id=scsi0,bus=pci.3,addr=0x1f 
-device virtio-blk-pci,drive=virtio0-hd0,bus=pci.0,serial=1cc9679a,bootindex=1 
-drive if=none,id=virtio0-hd1,file=/home/kylin-ksvd/ksvd-orgs/org-0/users/0local/jzt/win7-yjr/USER.IMG,cache=none,aio=threads,snapshot=off,throttling.bps-read=0,throttling.bps-write=0 
-device virtio-blk-pci,drive=virtio0-hd1,bus=pci.0,serial=962db7c2614e 
-device intel-hda,id=sound0 
-device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 
-device rtl8139,netdev=hostnet0,id=net0,mac=52:74:56:00:00:1d 
-device virtio-net-pci,netdev=hostnet1,id=net1 
-netdev tap,fd=3,id=hostnet0,vhost=on 
-netdev user,id=hostnet1,hostfwd=tcp::-4-:3389,hostfwd=tcp::-14-:8399,hostfwd=tcp::-9-:48666,hostfwd=tcp::-11-:5901,hostfwd=tcp::-12-:48888,hostfwd=tcp::-13-:48889 
-serial /dev/null 
-chardev pipe,path=@6,id=ksvdserial 
-device virtserialport,chardev=ksvdserial,name=cn.com.kylinos.serial.0 
-parallel none 
-spice tls-port=-8,disable-ticketing,disable-client2agent-copy-paste,disable-agent2client-copy-paste,disable-agent-file-xfer,image-compression=auto_glz,jpeg-wan-compression=always,zlib-glz-wan-compression=auto,playback-compression=on,x509-key-file=/usr/lib/ksvd/etc/ksvd-server-key.pem,x509-cert-file=/usr/lib/ksvd/etc/ksvd-server-cert.pem,x509-cacert-file=/usr/lib/ksvd/etc/ksvd-ca-cert.pem,streaming-video=filter,jpeg-quality=90,frame-rate=30,high-compress=off,high-compress-quality=80,high-compress-fps=30,wan-min-percent=20,wan-max-percent=80 
-vnc 0.0.0.0:4,password 
-vnc unix:/var/run/ksvd/users/jzt/win7-yjr/vnc.socket 
-device ich9-usb-ehci1,id=usb 
-device ich9-usb-uhci1,masterbus=usb.0,firstport=0,multifunction=on 
-device ich9-usb-uhci2,masterbus=usb.0,firstport=2 
-device ich9-usb-uhci3,masterbus=usb.0,firstport=4 
-chardev spicevmc,name=usbredir,id=usbredirchardev1 
-device ksvd_redir,chardev=usbredirchardev1,filter-path=/home/kylin-ksvd/.ksvd/usbSettings.21236964-5373-45b3-8854-4f7818012cd0,usb_degrade=0,id=usbredirdev1 
-chardev spicevmc,name=usbredir,id=usbredirchardev2 
-device ksvd_redir,chardev=usbredirchardev2,filter-path=/home/kylin-ksvd/.ksvd/usbSettings.21236964-5373-45b3-8854-4f7818012cd0,usb_degrade=0,id=usbredirdev2 
-chardev spicevmc,name=usbredir,id=usbredirchardev3 
-device ksvd_redir,chardev=usbredirchardev3,filter-path=/home/kylin-ksvd/.ksvd/usbSettings.21236964-5373-45b3-8854-4f7818012cd0,usb_degrade=0,id=usbredirdev3 
-chardev spicevmc,name=usbredir,id=usbredirchardev4 
-device ksvd_redir,chardev=usbredirchardev4,filter-path=/home/kylin-ksvd/.ksvd/usbSettings.21236964-5373-45b3-8854-4f7818012cd0,usb_degrade=0,id=usbredirdev4 
-chardev spicevmc,name=usbredir,id=usbredirchardev5 
-device ksvd_redir,chardev=usbredirchardev5,filter-path=/home/kylin-ksvd/.ksvd/usbSettings.21236964-5373-45b3-8854-4f7818012cd0,usb_degrade=0,id=usbredirdev5 
-chardev spicevmc,name=usbredir,id=usbredirchardev6 
-device ksvd_redir,chardev=usbredirchardev6,filter-path=/home/kylin-ksvd/.ksvd/usbSettings.21236964-5373-45b3-8854-4f7818012cd0,usb_degrade=0,id=usbredirdev6 
-name KSVD 8.1.9 [Provisioned] - win7-yjr

我们精简以下，只看它的device

-device usb-tablet 
-device ide-drive,drive=ide1-cd0,bus=ide.1,unit=0,ver=0.12.1  
-device qxl,id=video1,vram_size=33554432 
-device virtio-serial 
-device virtserialport,chardev=vdagent,name=com.redhat.spice.0 
-device pci-bridge,id=pci.3,chassis_nr=2,bus=pci.0,addr=0x1e 
-device virtio-scsi-pci,id=scsi0,bus=pci.3,addr=0x1f 
-device virtio-blk-pci,drive=virtio0-hd0,bus=pci.0,serial=1cc9679a,bootindex=1 
-device virtio-blk-pci,drive=virtio0-hd1,bus=pci.0,serial=962db7c2614e 
-device intel-hda,id=sound0 
-device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 
-device rtl8139,netdev=hostnet0,id=net0,mac=52:74:56:00:00:1d 
-device virtio-net-pci,netdev=hostnet1,id=net1 
-device virtserialport,chardev=ksvdserial,name=cn.com.kylinos.serial.0 
-device ich9-usb-ehci1,id=usb 
-device ich9-usb-uhci1,masterbus=usb.0,firstport=0,multifunction=on 
-device ich9-usb-uhci2,masterbus=usb.0,firstport=2 
-device ich9-usb-uhci3,masterbus=usb.0,firstport=4 
-device ksvd_redir,chardev=usbredirchardev1,filter-path=/home/kylin-ksvd/.ksvd/usbSettings.21236964-5373-45b3-8854-4f7818012cd0,usb_degrade=0,id=usbredirdev1 
-device ksvd_redir,chardev=usbredirchardev2,filter-path=/home/kylin-ksvd/.ksvd/usbSettings.21236964-5373-45b3-8854-4f7818012cd0,usb_degrade=0,id=usbredirdev2 
-device ksvd_redir,chardev=usbredirchardev3,filter-path=/home/kylin-ksvd/.ksvd/usbSettings.21236964-5373-45b3-8854-4f7818012cd0,usb_degrade=0,id=usbredirdev3 
-device ksvd_redir,chardev=usbredirchardev4,filter-path=/home/kylin-ksvd/.ksvd/usbSettings.21236964-5373-45b3-8854-4f7818012cd0,usb_degrade=0,id=usbredirdev4 
-device ksvd_redir,chardev=usbredirchardev5,filter-path=/home/kylin-ksvd/.ksvd/usbSettings.21236964-5373-45b3-8854-4f7818012cd0,usb_degrade=0,id=usbredirdev5 
-device ksvd_redir,chardev=usbredirchardev6,filter-path=/home/kylin-ksvd/.ksvd/usbSettings.21236964-5373-45b3-8854-4f7818012cd0,usb_degrade=0,id=usbredirdev6

qemu的 qdev 有一个alias转换，所以我们这里添加的virtio-serial其实等于virtio-serial-pci
具体有什么区别，暂时只做记录

/* Please keep this table sorted by typename. */
static const QDevAlias qdev_alias_table[] = {
    { "e1000", "e1000-82540em" },
    { "ich9-ahci", "ahci" },
    { "lsi53c895a", "lsi" },
    { "virtio-9p-ccw", "virtio-9p", QEMU_ARCH_S390X },
    { "virtio-9p-pci", "virtio-9p", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
    { "virtio-balloon-ccw", "virtio-balloon", QEMU_ARCH_S390X },
    { "virtio-balloon-pci", "virtio-balloon",
            QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
    { "virtio-blk-ccw", "virtio-blk", QEMU_ARCH_S390X },
    { "virtio-blk-pci", "virtio-blk", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
    { "virtio-gpu-ccw", "virtio-gpu", QEMU_ARCH_S390X },
    { "virtio-gpu-pci", "virtio-gpu", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
    { "virtio-input-host-ccw", "virtio-input-host", QEMU_ARCH_S390X },
    { "virtio-input-host-pci", "virtio-input-host",
            QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
    { "virtio-keyboard-ccw", "virtio-keyboard", QEMU_ARCH_S390X },
    { "virtio-keyboard-pci", "virtio-keyboard",
            QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
    { "virtio-mouse-ccw", "virtio-mouse", QEMU_ARCH_S390X },
    { "virtio-mouse-pci", "virtio-mouse", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
    { "virtio-net-ccw", "virtio-net", QEMU_ARCH_S390X },
    { "virtio-net-pci", "virtio-net", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
    { "virtio-rng-ccw", "virtio-rng", QEMU_ARCH_S390X },
    { "virtio-rng-pci", "virtio-rng", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
    { "virtio-scsi-ccw", "virtio-scsi", QEMU_ARCH_S390X },
    { "virtio-scsi-pci", "virtio-scsi", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
    { "virtio-serial-ccw", "virtio-serial", QEMU_ARCH_S390X },
    { "virtio-serial-pci", "virtio-serial", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
    { "virtio-tablet-ccw", "virtio-tablet", QEMU_ARCH_S390X },
    { "virtio-tablet-pci", "virtio-tablet", QEMU_ARCH_ALL & ~QEMU_ARCH_S390X },
    { }
};

主要新增函数

void set_ksvd_redir_2_args(Launcher &kvm, int num)
{
    //set qemu usb2.0 args
    kvm.push(" -device", "ich9-usb-ehci1, id=usb.0, bus=pci.0,addr=0x4.0x7");
    for (int i = 0; i < num; i++)
    {
        if (i == 0){
            kvm.push(" -device", "ich9-usb-uhci%d, masterbus=usb.0, firstport=%d, bus=pci.0, addr=0x4,0x%x, mulitifunction=on",
                i + 1, i*2, i)；
        }
        kvm.push(" -device", "ich9-usb-uhci%d, masterbus=usb.0, firstport=%d, bus=pci.0, addr=0x4.0x%x", i + 1, i*2, i);
    }
}

void set_ksvd_redir_3_args(Launcher &kvm, int num)
{
    //set qemu usb3.0 args
    kvm.push(" -device", "ich9-usb-xhci, id=usb.1, bus=pci.0,addr=0x5");
}

void set_usb_redir_args_degrade(Launcher &kvm, int usb2, int usb3, const char* filter)
{
    set_ksvd_redir_2_args(kvm, usb2);
    set_ksvd_redir_3_args(kvm, usb3);
    int idx = 0;
    for (int i = 0; i < usb2; i++,idx++)
    {
        kvm.push(" -chardev", "spicevmc, name=usbredir, id=usbredirchardev%d", idx);
        kvm.push(" -device", "usb-redir, id=usb-redir%d, bus=usb.0, port=%d, filter=%s", idx, i, filter);
    }
    for (int i = 3; i < usb3; i++,idx++)
    {
        kvm.push(" -chardev", "spicevmc, name=usbredir, id=usbredirchardev%d", idx);
        kvm.push(" -device", "usb-redir, id=usb-redir%d, bus=usb.1, port=%d, filter=%s", idx, i, filter);
    }
}
void set_usb_redir_args(Launcher &kvm, int usb2, int usb3, const char* filter_path)
{
    set_ksvd_redir_2_args(kvm, usb2);
    set_ksvd_redir_3_args(kvm, usb3);
    int idx = 0;
    for (int i = 0; i < usb2; i++,idx++ )
    {
        kvm.push(" -chardev", "spicevmc, name=usbreir, id=usbredirchardev%d", idx);
        kvm.push(" -device", "ksvd_redir, id=ksvd_redir%d, bus=usb.0, port=%d, filter_path=%s", idx, i, filter_path);
    }
    for (int i = 0; i < usb3; i++,idx++ )
    {
        kvm.push(" -chardev", "spicevmc, name=usbreir, id=usbredirchardev%d", idx);
        kvm.push(" -device", "ksvd_redir, id=ksvd_redir%d, bus=usb.1, port=%d, filter_path=%s", idx, i, filter_path);
    }
}

void set_kvm_uvcs_args(Launcher &kvm. const char* filter_path)
{
    INFO_("try to start uvcredir");
    for (int i = 0 ; i < UNIQB_MAX_CAMERA_NUM; i++){
        if (!getAvalibalePort(state.run.camera_port[i])){
            Err_("no available port for camera %d", i);
            break;
        }
        INFO_("start uvcredir %d, port %d", i, state.run.camera_port[i]);
        kvm.push(" -chardev", "socket,id=uvcredirchardev%d,host=localhost,port=%d,server,nowait,ipv4", i, state.run.camera_port[i]);
        kvm.push(" -device", "uvc-redir, chardev=uvcredirchardev%d, id=uvcredir%d, filter-path=%s", i, i, filter_path);
    }
}

void set_kvm_uvcs_args_degrade(Launcher &kvm)
{
    INFO_("try to start uvcredir degrade");
    for (int i = 0 ; i < UNIQB_MAX_CAMERA_NUM; i++){
        if (!getAvalibalePort(state.run.camera_port[i])){
            Err_("no available port for camera %d", i);
            break;
        }
        INFO_("start uvcredir %d, port %d", i, state.run.camera_port[i]);
        kvm.push(" -chardev", "socket,id=uvcredirchardev%d,host=localhost,port=%d,server,nowait,ipv4", i, state.run.camera_port[i]);
        kvm.push(" -device", "uvc-redir, chardev=uvcredirchardev%d, id=uvcredir%d", i, i);
    }
}

设备类型继承结构(qemu类图，部分)

TYPE_OBJECT “object”

TYPE_DEVICE “device”

TYPE_PCI_DEVICE “pci-device”

TYPE_PCI_EHCI “pci-ehci-usb”

TYPE_UHCI “pci-uhci-usb”

TYPE_XHCI “base-xhci”

TYPE_NEC_XHCI “nec-usb-xhci”

TYPE_QEMU_XHCI “qemu-xhci”

“pci-serial”

TYPE_USB_DEVICE “usb-device”

TYPE_USB_REDIR “usb-redir”

TYPE_KSVD_REDIR “ksvd_redir”

TYPE_UVC_REDIR “uvc-redir”

TYPE_USB_SERIAL “usb-serial-dev”

TYPE_VIRTIO_SERIAL_PORT “virtio-serial-port”

TYPE_VIRTIO_DEVICE “virtio-device”

TYPE_BUS “bus”

TYPE_USB_BUS “usb-bus”

TYPE_PCI_BUS “PCI”

TYPE_PCIE_BUS “PCIE”

TYPE_PXB_PCIE_BUS “pxb-pcie-bus”

TYPE_PXB_BUS “pxb-bus”

设备连接结构（qemu进程，设备结构图，部分）

pci(TYPE_PCI_DEVICE?)

pci.0(TYPE_PCI_BUS？)

slot 0x4

func 0x0

noid (TYPE_UHCI)

(link usb.0’s usbbus)

func 0x1

noid (TYPE_UHCI)

(link usb.0’s usbbus)

func 0x2

noid (TYPE_UHCI)

(link usb.0’s usbbus)

func 0x7

usb2(TYPE_PCI_EHCI)

usb2.0(TYPE_USB_BUS)

slot 0x0 func 0x0

usb-redir0(TYPE_USB_REDIR)

slot 0x1 func 0x0

usb-redir1(TYPE_USB_REDIR)

slot 0x2 func 0x0

usb-redir2(TYPE_USB_REDIR)

slot 0x3 func 0x0

usb-redir3(TYPE_USB_REDIR)

slot 0x4 func 0x0

usb-redir4(TYPE_USB_REDIR)

slot 0x5 func 0x0

usb-redir5(TYPE_USB_REDIR)

slot 0x6 func 0x0

uvcredir0(TYPE_UVC_REDIR)

slot 0x7 func 0x0

uvcredir1(TYPE_UVC_REDIR)

slot 0x8 func 0x0

uvcredir2(TYPE_UVC_REDIR)

slot 0x9 func 0x0

uvcredir3(TYPE_UVC_REDIR)

slot 0x5

func 0x0

usb3 (TYPE_NEC_XHCI)

usb3.0 (TYPE_USB_BUS)

slot 0x0 func 0x0

usb-redir6(TYPE_USB_REDIR)

slot 0x1 func 0x0

usb-redir7(TYPE_USB_REDIR)

slot 0x2 func 0x0

usb-redir8(TYPE_USB_REDIR)

slot 0x3 func 0x0

usb-redir9(TYPE_USB_REDIR)

参考文献

Device & Bus & Driver
https://blog.csdn.net/u011364612/article/details/53809730
https://blog.csdn.net/weixin_30741653/article/details/98049607
https://www.cnblogs.com/r1ng0/p/12809667.html

问题

qemu-kvm: -device usb-redir,chardev=usbredirchardev6,id=usb-redir6,bus=xhci.0,port=1,usb_degrade=0,filter-path=/home/kylin-ksvd/.ksvd/usbSettings.f0554724-4b3e-46c3-938b-f5fffceeb12c: usb port 1 (bus xhci.0) not found (in use?)

参数

-vnc unix:/var/run/ksvd/users/ygh/win10-test-ly/vnc.socket
-device ich9-usb-ehci1,id=ehci,bus=pci.0,addr=0x19.0x0,multifunction=on
-device ich9-usb-uhci1,masterbus=ehci.0,firstport=0,bus=pci.0,addr=0x19.0x1
-device ich9-usb-uhci2,masterbus=ehci.0,firstport=2,bus=pci.0,addr=0x19.0x2
-device ich9-usb-uhci3,masterbus=ehci.0,firstport=4,bus=pci.0,addr=0x19.0x3
-device nec-usb-xhci,id=xhci,bus=pci.0,addr=0x1a
-device usb-tablet,bus=xhci.0
-device usb-host,id=hostdev0,bus=xhci.0
-chardev spicevmc,name=usbredir,id=usbredirchardev0
-device usb-redir,chardev=usbredirchardev0,id=usb-redir0,bus=ehci.0,port=1,usb_degrade=0,filter-path=/home/kylin-ksvd/.ksvd/usbSettings.f0554724-4b3e-46c3-938b-f5fffceeb12c

报错代码

void usb_claim_port(USBDevice *dev, Error **errp)
{
    USBBus *bus = usb_bus_from_device(dev);
    USBPort *port;

    assert(dev->port == NULL);

    if (dev->port_path) {
        QTAILQ_FOREACH(port, &bus->free, next) {
            if (strcmp(port->path, dev->port_path) == 0) {
                break;
            }
        }
        if (port == NULL) {
            error_setg(errp, "usb port %s (bus %s) not found (in use?)",
                       dev->port_path, bus->qbus.name);
            return;
        }
    }
    //...
}

void usb_ehci_realize(EHCIState *s, DeviceState *dev, Error **errp)
{
    int i;

    if (s->portnr > NB_PORTS) {
        error_setg(errp, "Too many ports! Max. port number is %d.",
                   NB_PORTS);
        return;
    }
    if (s->maxframes < 8 || s->maxframes > 512)  {
        error_setg(errp, "maxframes %d out if range (8 .. 512)",
                   s->maxframes);
        return;
    }

    usb_bus_new(&s->bus, sizeof(s->bus), s->companion_enable ?
                &ehci_bus_ops_companion : &ehci_bus_ops_standalone, dev);
    for (i = 0; i < s->portnr; i++) {
        usb_register_port(&s->bus, &s->ports[i], s, i, &ehci_port_ops,
                          USB_SPEED_MASK_HIGH);
        s->ports[i].dev = 0;
    }

    s->frame_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, ehci_work_timer, s);
    s->async_bh = qemu_bh_new(ehci_work_bh, s);
    s->device = dev;

    s->vmstate = qemu_add_vm_change_state_handler(usb_ehci_vm_state_change, s);
}
void usb_register_port(USBBus *bus, USBPort *port, void *opaque, int index,
                       USBPortOps *ops, int speedmask)
{
    usb_fill_port(port, opaque, index, ops, speedmask);
    QTAILQ_INSERT_TAIL(&bus->free, port, next);
    bus->nfree++;
}
static void usb_fill_port(USBPort *port, void *opaque, int index,
                          USBPortOps *ops, int speedmask)
{
    port->opaque = opaque;
    port->index = index;
    port->ops = ops;
    port->speedmask = speedmask;
    usb_port_location(port, NULL, index + 1);
}
void usb_port_location(USBPort *downstream, USBPort *upstream, int portnr)
{
    if (upstream) {
        int l = snprintf(downstream->path, sizeof(downstream->path), "%s.%d",
                         upstream->path, portnr);
        /* Max string is nn.nn.nn.nn.nn, which fits in 16 bytes */
        assert(l < sizeof(downstream->path));
        downstream->hubcount = upstream->hubcount + 1;
    } else {
        snprintf(downstream->path, sizeof(downstream->path), "%d", portnr);
        downstream->hubcount = 0;
    }
}

realize的时候，使用usb_bus_new 创建了ehci.0的bus
通过usb_register_port注册port,port的path是index+1 也就是从1-portnr

问题解决

参数

参数	解释	范围	默认值
KSVD_NATIVE_USB_2	2.0通道数	[0-10]	6
KSVD_NATIVE_USB_3	3.0通道数	[0-10]	4
KSVD_NATIVE_USB_PRIORITY	优先使用2.0还是3.0	[2\|3]	2
KSVD_NATIVE_UVC_AT	摄像头位于	[ehci\|xhci]	ehci
KSVD_NATIVE_USB_3_MODE	摄像头3.0主控选择	[nec\|qemu]	nec

本文作者： crazyboy
本文链接： http://crazyboy.www.crazyboy.info/blog/blog/2022/04/28/kylin/usb/redir/usbpolicy/fsd/
版权声明： 本博客所有文章除特别声明外，均采用 MIT 许可协议。转载请注明出处！