[Bug 57831] New: radeon fatal error during GPU init (Radeon 5850, KVM GPU passthrough)

[Bug 57831] New: radeon fatal error during GPU init (Radeon 5850, KVM GPU passthrough)

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=57831

           Summary: radeon fatal error during GPU init (Radeon 5850, KVM
                    GPU passthrough)
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.9.0
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
        AssignedTo: drivers_video-dri@kernel-bugs.osdl.org
        ReportedBy: luke-jr+linuxbugs@utopios.org
        Regression: No


Booting on a KVM instance tested to work fine with fglrx:
[    3.771157] [drm] Initialized drm 1.1.0 20060810
[    4.006077] [drm] radeon kernel modesetting enabled.
[    4.006350] ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 11
[    4.006714] [drm] initializing kernel modesetting (CYPRESS 0x1002:0x6899
0x1458:0x21E4).
[    4.006723] [drm] register mmio base: 0xFEB80000
[    4.006724] [drm] register mmio size: 131072
[    4.006785] radeon 0000:00:05.0: Expecting atombios for evergreen GPU
[    4.006786] radeon 0000:00:05.0: Fatal error during GPU init
[    4.006789] [drm] radeon: finishing device.
[    4.006792] [TTM] Memory type 2 has not been initialized
[    4.008077] radeon: probe of 0000:00:05.0 failed with error -22

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[Bug 57831] radeon fatal error during GPU init (Radeon 5850, KVM GPU passthrough)

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=57831


Alex Deucher <alexdeucher@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alexdeucher@gmail.com




--- Comment #1 from Alex Deucher <alexdeucher@gmail.com>  2013-05-09 13:17:59 ---
You need to make sure the VM has access to the PCI rom.

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[Bug 57831] radeon fatal error during GPU init (Radeon 5850, KVM GPU passthrough)

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=57831





--- Comment #2 from Luke-Jr <luke-jr+linuxbugs@utopios.org>  2013-05-09 20:47:30 ---
I guess I assumed that the hardware end should be working fine since fglrx
works. Is needing the PCI ROM something unique to the free drivers?

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[Bug 57831] radeon fatal error during GPU init (Radeon 5850, KVM GPU passthrough)

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=57831





--- Comment #3 from Alex Deucher <alexdeucher@gmail.com>  2013-05-09 21:01:41 ---
No both drivers need the vbios image.  The closed driver either gets the vbios
via some alternative means or it has some sort of fallback image if it can't
find the actual vbios image.

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[Bug 57831] radeon fatal error during GPU init (Radeon 5850, KVM GPU passthrough)

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=57831





--- Comment #4 from Luke-Jr <luke-jr+linuxbugs@utopios.org>  2013-05-09 22:19:33 ---
Confirmed both the fglrx and radeon systems are getting the Cirrus (emulated)
VGA ROM instead of the Radeon ROM.

Is there a way I can override/provide the Radeon ROM to the driver as a
workaround?

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[Bug 57831] radeon fatal error during GPU init (Radeon 5850, KVM GPU passthrough)

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=57831





--- Comment #5 from Alex Deucher <alexdeucher@gmail.com>  2013-05-09 22:32:47 ---
You should be able to pass the existing pci rom resource through to the VM, but
I'm not really a KVM expert.  Just about every graphics driver is going to need
the vbios image so there is presumably a way.  Might want to ask on the KVM
mailing lists.  These links may be useful:
http://www.linux-kvm.org/page/VGA_device_assignment
http://thread.gmane.org/gmane.comp.emulators.kvm.devel/71981
This isn't really a driver bug.  I think this bug can be closed.

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[Bug 57831] radeon fatal error during GPU init (Radeon 5850, KVM GPU passthrough)

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https://bugzilla.kernel.org/show_bug.cgi?id=57831





--- Comment #6 from Luke-Jr <luke-jr+linuxbugs@utopios.org>  2013-05-09 22:52:11 ---
For the workaround, I meant the driver ignoring the vbios ROM, and instead
loading it from a firmware file. ;)

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[Bug 57831] radeon fatal error during GPU init (Radeon 5850, KVM GPU passthrough)

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https://bugzilla.kernel.org/show_bug.cgi?id=57831





--- Comment #7 from Alex Deucher <alexdeucher@gmail.com>  2013-05-09 23:06:32 ---
That's not something I'd like to support in the driver.  If you can't get the
vbios, you probably have bigger problems.

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[Bug 57831] radeon fatal error during GPU init (Radeon 5850, KVM GPU passthrough)

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https://bugzilla.kernel.org/show_bug.cgi?id=57831


Luke-Jr <luke-jr+linuxbugs@utopios.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |INVALID




--- Comment #8 from Luke-Jr <luke-jr+linuxbugs@utopios.org>  2013-05-09 23:16:03 ---
Well, like I said... this works fine with fglrx, so I'd guess the VBIOS is the
only issue.

Seems qemu is mixing up the VBIOS for the two video cards (emulated Cirrus +
passthrough Radeon) - the first 64K of the virtualized Radeon's rom is that of
the Cirrus, but the 2nd 64K is correct.

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