[Qemu-devel] More PCI ethernet emulations

[Qemu-devel] More PCI ethernet emulations

[Stefan Weil]

Hello,

I want to run QEMU with disk images of existing PC hardware.
These PC hardware uses ethernet cards which are not emulated
by QEMU, and because the disk images only support these cards,
the current QEMU won't work. So I have to write new emulation
drivers for QEMU...

These are the emulations needed:
    Intel 8255xER PCI (Linux driver: eepro100)
    Realtek RTL8168/8111 PCI (Linux driver: r1000)
    National Semiconductor DP83815/DP83816 (Linux driver: natsemi)

If somebody already started to write any of these emulations
this would be really helpful. Any other kind of help is welcome, too.

Regards
Stefan

[Qemu-devel] [BUG?] Duplicate PCI setup?

[Stefan Weil]

When I start QEMU for i386 with an emulated PCI network card,
this card's PCI memory space is setup twice:
once by QEMU, a second time from BIOS.

PCI I/O regions both times get the same address:
ne2000_map: region=0, addr=0x0000c100, size=0x00000100, type=1
ne2000_map: region=0, addr=0x0000c100, size=0x00000100, type=1

PCI memory regions get two different addresses.

Maybe the setup by QEMU was needed with an earlier PC BIOS
and is no longer needed today?

Stefan

Re: [Qemu-devel] [BUG?] Duplicate PCI setup?

[Paul Brook]

On Sunday 24 September 2006 19:52, Stefan Weil wrote:
> When I start QEMU for i386 with an emulated PCI network card,
> this card's PCI memory space is setup twice:
> once by QEMU, a second time from BIOS.
>
> PCI I/O regions both times get the same address:
> ne2000_map: region=0, addr=0x0000c100, size=0x00000100, type=1
> ne2000_map: region=0, addr=0x0000c100, size=0x00000100, type=1
>
> PCI memory regions get two different addresses.

So? Why is this a problem?
PCI is designed to allow dynamic resource (re-)configuration.

> Maybe the setup by QEMU was needed with an earlier PC BIOS
> and is no longer needed today?

From hw/piix_pci.c

/*
 * This function initializes the PCI devices as a normal PCI BIOS
 * would do. It is provided just in case the BIOS has no support for
 * PCI.
 */

Paul

Re: [Qemu-devel] [BUG?] Duplicate PCI setup?

[Stefan Weil]

This was fixed with the latest CVS changes.
Fabrice, you are really fast!

Merci,
Stefan

On Sunday 24 September 2006 19:52, Stefan Weil wrote:

> When I start QEMU for i386 with an emulated PCI network card,
> this card's PCI memory space is setup twice:
> once by QEMU, a second time from BIOS.
>
> PCI I/O regions both times get the same address:
> ne2000_map: region=0, addr=0x0000c100, size=0x00000100, type=1
> ne2000_map: region=0, addr=0x0000c100, size=0x00000100, type=1
>
> PCI memory regions get two different addresses.

Re: [Qemu-devel] More PCI ethernet emulations

[Stefan Weil]

Hello,

these new ethernet drivers for QEMU are now available:

Intel 8255x ("E100", "EEPRO100"):
http://svn.berlios.de/wsvn/ar7-firmware/qemu/trunk/hw/eepro100.c?op=file

National Semiconductor DP83815/DP83816:
http://svn.berlios.de/wsvn/ar7-firmware/qemu/trunk/hw/dp8381x.c?op=file

Both drivers use a new EEPROM driver:
http://svn.berlios.de/wsvn/ar7-firmware/qemu/trunk/hw/eeprom93xx.c?op=file
http://svn.berlios.de/wsvn/ar7-firmware/qemu/trunk/hw/eeprom93xx.h?op=file

This EEPROM driver can be shared by any other device which needs
an EEPROM, for example replace the driver for RTL8139 or add an
EEPROM to cirrus vga or other ethernet cards.

I estimate the status of the EEPROM driver to be stable.
Fabrice, maybe this part can be integrated in QEMU head.

Both ethernet drivers work with QEMU head and Linux on x86 host / guest,
but have known endianess issues (they will at least need fixes for big
endian hosts) and are experimental. I am still working on them.

Feedback and bug fixes are welcome.

Regards
Stefan

> Hello,
>
> I want to run QEMU with disk images of existing PC hardware.
> These PC hardware uses ethernet cards which are not emulated
> by QEMU, and because the disk images only support these cards,
> the current QEMU won't work. So I have to write new emulation
> drivers for QEMU...
>
> These are the emulations needed:
> Intel 8255xER PCI (Linux driver: eepro100)
> Realtek RTL8168/8111 PCI (Linux driver: r1000)
> National Semiconductor DP83815/DP83816 (Linux driver: natsemi)
>
> If somebody already started to write any of these emulations
> this would be really helpful. Any other kind of help is welcome, too.
>
> Regards
> Stefan
>
>

Re: [Qemu-devel] More PCI ethernet emulations

[Stefan Weil]

Hello,

these new ethernet drivers for QEMU are now available:

Intel 8255x ("E100", "EEPRO100"):
http://svn.berlios.de/wsvn/ar7-firmware/qemu/trunk/hw/eepro100.c?op=file

National Semiconductor DP83815/DP83816:
http://svn.berlios.de/wsvn/ar7-firmware/qemu/trunk/hw/dp8381x.c?op=file

Both drivers use a new EEPROM driver:
http://svn.berlios.de/wsvn/ar7-firmware/qemu/trunk/hw/eeprom93xx.c?op=file
http://svn.berlios.de/wsvn/ar7-firmware/qemu/trunk/hw/eeprom93xx.h?op=file

This EEPROM driver can be shared by any other device which needs
an EEPROM, for example replace the driver for RTL8139 or add an
EEPROM to cirrus vga or other ethernet cards.

I estimate the status of the EEPROM driver to be stable.
Fabrice, maybe this part can be integrated in QEMU head.

Both ethernet drivers work with QEMU head and Linux on x86 host / guest,
but have known endianess issues (they will at least need fixes for big
endian hosts) and are experimental. I am still working on them.

Feedback and bug fixes are welcome.

Regards
Stefan

> Hello,
>
> I want to run QEMU with disk images of existing PC hardware.
> These PC hardware uses ethernet cards which are not emulated
> by QEMU, and because the disk images only support these cards,
> the current QEMU won't work. So I have to write new emulation
> drivers for QEMU...
>
> These are the emulations needed:
> Intel 8255xER PCI (Linux driver: eepro100)
> Realtek RTL8168/8111 PCI (Linux driver: r1000)
> National Semiconductor DP83815/DP83816 (Linux driver: natsemi)
>
> If somebody already started to write any of these emulations
> this would be really helpful. Any other kind of help is welcome, too.
>
> Regards
> Stefan
>
>

Re: [Qemu-devel] More PCI ethernet emulations

[Stefan Weil]

[-- Attachment #1: Type: text/plain, Size: 1646 bytes --]

Hello,

these new PCI ethernet drivers for QEMU are now available:

* Intel 8255x ("E100", "EEPRO100")

* National Semiconductor DP83815/DP83816

* Both drivers use a new EEPROM driver.

This EEPROM driver can be shared by any other device which needs
an EEPROM, for example replace the driver for RTL8139 or add an
EEPROM to cirrus vga or other ethernet cards.

I estimate the status of the EEPROM driver to be stable.
Fabrice, maybe this part can be integrated in QEMU head.

Both ethernet drivers work with QEMU head and Linux on x86 host / guest,
but have known endianess issues (they will at least need fixes for big
endian hosts) and are experimental. I am still working on them.

Feedback and bug fixes are welcome.

Regards
Stefan Weil

PS. I tried to send this mail several times using a URL for each
new driver file, but these mails did not reach the mailing list.
Are mails with URLs blocked by some mechanism?
Now all new source files are in the tar archive appended to the mail.


> Hello,
>
> I want to run QEMU with disk images of existing PC hardware.
> These PC hardware uses ethernet cards which are not emulated
> by QEMU, and because the disk images only support these cards,
> the current QEMU won't work. So I have to write new emulation
> drivers for QEMU...
>
> These are the emulations needed:
> Intel 8255xER PCI (Linux driver: eepro100)
> Realtek RTL8168/8111 PCI (Linux driver: r1000)
> National Semiconductor DP83815/DP83816 (Linux driver: natsemi)
>
> If somebody already started to write any of these emulations
> this would be really helpful. Any other kind of help is welcome, too.
>
> Regards
> Stefan
>
>







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Re: [Qemu-devel] More PCI ethernet emulations

[Stefan Weil]

A new PCI network card is emulated partially with QEMU:

the wireless LAN adapter TNETW1130 (ACX111).

I needed this driver as a debugging aid for existing (AR7) hardware
with the Open Source ACX111 driver for Linux.

So my main focus are debug messages from this driver, not real
network emulation (although this might be the first emulated
wireless LAN).

The current version emulates PCI hardware detection and some
basic functions including firmware download. It works with Linux
2.6.x on PC- or AR7 based emulated hardware.

Source is available from
http://svn.berlios.de/wsvn/ar7-firmware/qemu/trunk/hw/tnetw1130.c?op=file

Contributions or feedback are welcome.

Stefan