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xen-devel
RE: [Xen-devel] anyone using pvusb?
>
> Hi James,
>
> >> Is anyone successfully using pvusb under 3.4-testing and
2.6.18-xen?
>
> Could you explain more details about the issue?
>
> - changeset of xen/kernel, arch (x86 or x64)
Xen is very recent 3.4-testing.hg
Kernel is latest 2.6.18-xen.hg x64
> - H/W (CPU, M/B, USB Host controller, ...)
# cat /proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 15
model : 67
model name : Dual-Core AMD Opteron(tm) Processor 1210
stepping : 3
cpu MHz : 1800.006
cache size : 1024 KB
physical id : 0
siblings : 1
core id : 0
cpu cores : 1
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu de tsc msr pae mce cx8 apic mtrr mca cmov pat
clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt lm 3dnowext
3dnow up pni cx16 lahf_lm cmp_legacy cr8_legacy
bogomips : 3601.83
TLB size : 1024 4K pages
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management: ts fid vid ttp tm stc
> - USB device (Device name and VendorId/ProdId)
# lsusb -v
Bus 001 Device 006: ID 0204:6025 Chipsbank Microelectronics Co., Ltd
CBM2080 Flash drive controller
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x0204 Chipsbank Microelectronics Co., Ltd
idProduct 0x6025 CBM2080 Flash drive controller
bcdDevice 1.00
iManufacturer 1 USB2.0
iProduct 2 Flash Disk
iSerial 3 229360546401
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 8 Mass Storage
bInterfaceSubClass 6 SCSI
bInterfaceProtocol 80 Bulk (Zip)
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Device Status: 0x0001
Self Powered
> - your setting (show me xenstore entries)
# xenstore-ls /local/domain/2/device/vusb
0 = ""
backend-id = "0"
backend = "/local/domain/0/backend/vusb/2/0"
state = "4"
ring-ref = "797"
event-channel = "10"
# xenstore-ls /local/domain/0/backend/vusb/2/0
frontend-id = "2"
frontend = "/local/domain/2/device/vusb/0"
num-ports = "8"
port-1 = "2"
port-2 = "0"
port-3 = "0"
port-4 = "0"
port-5 = "0"
port-6 = "0"
port-7 = "0"
port-8 = "0"
state = "4"
>
> >> The device I'm testing with is a flash memory stick, and basically
the
> >> first BULK packet gets sent successfully, which I assume is a read
> >> request, and then a packet is sent to be filled with data read from
the
> >> flash device and it either hangs there, or comes back with 0 bytes
and
> >> then the next packet hangs - usb_submit_urb returns success but the
> >> complete callback routine is never called.
>
> Failure of the SCSI-device scanning did not occur with the storage
> devices that I've tested.
>
> But, this error might happen due to the mismatch of the
> urb->transfer_flags.
> I've seen this in the very early version of pvusb.
I have tested a few combinations of transfer_flags and haven't had any
success, but haven't investigated that thoroughly
Thanks
James
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