Getting USB2 on FreeBSD 5.3?

[Julian Elischer]

Paul Hoffman wrote:
> [[ Copied and amended from the thread of similar name on 
> freebsd-questions. ]]
> 
> Greetings again. I have a no-name USB 2 controller card in my server 
> running FreeBSD 5.3. I rebuilt the kernel with the ehci driver (simply 
> by adding a line to copy of GENERIC and rebuilding). The box already has 
> two USB 1 ports. The dmesg says:
> 
> . . .
> ohci0: <NEC uPD 9210 USB controller> mem 0xfe123000-0xfe123fff irq 18 at 
> device 3.0 on pci0
> ohci0: [GIANT-LOCKED]
> usb0: OHCI version 1.0
> usb0: <NEC uPD 9210 USB controller> on ohci0
> usb0: USB revision 1.0
> uhub0: NEC OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
> uhub0: 3 ports with 3 removable, self powered
> ohci1: <NEC uPD 9210 USB controller> mem 0xfe122000-0xfe122fff irq 19 at 
> device 3.1 on pci0
> ohci1: [GIANT-LOCKED]
> usb1: OHCI version 1.0
> usb1: <NEC uPD 9210 USB controller> on ohci1
> usb1: USB revision 1.0
> uhub1: NEC OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
> uhub1: 2 ports with 2 removable, self powered
> ehci0: <NEC uPD 720100 USB 2.0 controller> mem 0xfe124000-0xfe1240ff irq 
> 18 at device 3.2 on pci0
> ehci0: [GIANT-LOCKED]
> ehci_pci_attach: companion usb0
> ehci_pci_attach: companion usb1
> usb2: EHCI version 0.95
> usb2: companion controllers, 3 ports each: usb0 usb1
> usb2: <NEC uPD 720100 USB 2.0 controller> on ehci0
> usb2: USB revision 2.0
> uhub2: NEC EHCI root hub, class 9/0, rev 2.00/1.00, addr 1
> uhub2: 5 ports with 5 removable, self powered
> . . .
> ohci2: <OHCI (generic) USB controller> mem 0xfe120000-0xfe120fff irq 3 
> at device 15.2 on pci0
> ohci2: [GIANT-LOCKED]
> usb3: OHCI version 1.0, legacy support
> usb3: SMM does not respond, resetting
> usb3: <OHCI (generic) USB controller> on ohci2
> usb3: USB revision 1.0
> uhub3: (0x1166) OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
> uhub3: 2 ports with 2 removable, self powered
> 
> When I plug in a USB 2 IDE adapter to the USB 2 card, I see:
> 
> umass0: Myson Century, Inc. USB Mass Storage Device, rev 2.00/a3.01, addr 2
> da0 at umass-sim0 bus 0 target 0 lun 0
> da0: <ST312002 6A 3.04> Fixed Direct Access SCSI-0 device
> da0: 1.000MB/s transfers
> da0: 114473MB (234441648 512 byte sectors: 255H 63S/T 14593C)
> 
> The transfers happen at USB 1, not USB 2 speeds, which is of course not 
> what I want.


how do you tell they happen at USB1 speeds?

> 
> I can't tell why da0 is getting the slow (USB 1) mode. I also can't 
> figure out what the heck ohci2 is; there is only the on-board USB 1 
> ports (which I assume are ohci0 and ohci1) and the card (which is 
> clearly ehci0). Is ohci2 possibly also running on the add-in card and 
> stomping on ehci0?


the EHCI spec says that an EHCI controller will also contain N USB1
controllers (ohci OR uhci) to handle USB1 devices. the devices are switched
to teh USB1 or USB 2 controller automatically by the hardware.



> 
> I guess a related question is how can I tell what device umass0 thinks 
> it is plugged into?

You need to run usbdevs to see what is plugged in where.

> 
> [[ Robert Huff replied:
>         The last I remember, the ehci driver was closer to alpha than
> beta quality (as in both flakey and feature-sparse).  You should
> probably check the usb@ mailing list archives and even the commit
> logs for more information.
> ]]
> 
> [[ John Wilson replied:
> For what it's worth, I too am using ehci with a USB2 HD based MP3 
> player, and
> it is being reported similarly as well in regard to the 1.000MB/s transfer
> rate.  However, according to `systat -vmstat`, I am seeing transfers in the
> area of 8MB/s.  In regard to stability, I've had no issues at all with it.
> I'm sure this doesn't help at all. ;p


don't trust the reported speed in dmesg.. it is almost always wrong.

> ]]
> 
> [[ I replied:
> Actually, it helps some. I am seeing similar results (well, 7.1
> MB/s), so this is a bit heartening. But it doesn't explain why we're
> not seeing the 50 MB/s we're supposed to be seeing.
> ]]

you may get more in -current.. I'e seen 25MB/sec
50MB/sec is approachinghte theoretical maximum for bulk xfers
and I doubt you'll see that in practice.


> 
> So, my question to the USB-specific list is: what should I be doing 
> differently to get closer to the 50MB/sec expected from USB2?
> 
> --Paul Hoffman
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