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RE: [Qemu-devel] QEMU only support USBendpoint 02(output)and 81(input)?


From: Yu, Xiaoyang
Subject: RE: [Qemu-devel] QEMU only support USBendpoint 02(output)and 81(input)?
Date: Fri, 30 Mar 2007 10:45:10 +0800

Shaddy,

Thanks for your help. I used "info usbhost" command to find the plugged USB 
disks and used "usb_add" command to add USB disks to the guest OS.

For debugging purpose, I edited "hw/usb-uhci.c" to enable "#define 
DEBUG_PACKET" and logged UHCI packet information into log files. 

Please kindly find the log files for the "bad" and "good" USB disks in the 
attachment. Their USB information is as following:

CNDATA: ("bad")

T:  Bus=03 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#=  3 Spd=12  MxCh= 0
D:  Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=0ed1 ProdID=6680 Rev= 1.00
S:  Manufacturer=Generic
S:  Product=Mass Storage Device
C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr= 50mA
I:  If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
E:  Ad=01(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms
E:  Ad=82(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms

Baitangping: ("good")

T:  Bus=03 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#=  2 Spd=12  MxCh= 0
D:  Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=1043 ProdID=8006 Rev= 1.00
S:  Manufacturer=Generic
S:  Product=Flash Disk
C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=100mA
I:  If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
E:  Ad=81(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms

In the log file qemu.log.cndata.frame (for "bad" disk), in line 181, the bulk 
input returns error, and indicate for timeout failure. While in the log file 
qemu.log.baitangping.frame(for "good" disk), in line 145, the bulk input is 
success. 

Hope this information to be useful. If you need further information, please 
kindly let me know. Thanks a lot!

Thanks
Xiaoyang

-----Original Message-----
From: address@hidden [mailto:address@hidden On Behalf Of Shaddy Baddah
Sent: 2007年3月30日 0:48
To: address@hidden
Subject: Re: [Qemu-devel] QEMU only support USBendpoint 02(output)and 81(input)?

Hi,

On 3/29/2007 2:52 PM, Yu, Xiaoyang wrote:
> I used QEMU 0.9.0 to do the testing. All the seven USB disks can work 
> properly in host OS (Linux 2.6), so the USB devices and its interaction with 
> the kernel drivers should be okay. So the problem must be in QEMU USB code. 

As far as I know, QEMU does not have any of its own special USB 
handling. It has USB emulation. But this does not influence how it 
handles disk images... even if they are on a USB device.

Perhaps you can demonstrate some QEMU command-lines to indicate how you 
are testing these disks?

Regards,
Shaddy


Attachment: qemu.log.cndata.frame
Description: qemu.log.cndata.frame

Attachment: qemu.log.baitangping.frame
Description: qemu.log.baitangping.frame


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