[BUG] Ioremap error with nvidia in 2.6.38-rc6
 

When testing 2.6.38-rc6, while starting xorg I noticed following


===========================================
=======================================

Going by the kernel source, I noticed that request and response are differing over the cacheability of the memory region.

Sifting through the kernel git, I noticed

http://git.kernel.org/?p=linux/kerne...69e069dc2e0b8d

So, this looks like the culprit.

For Intel 9 code, they have made following change,

http://git.kernel.org/?p=linux/kerne...c62f65e0851fd3

Now, looking at the nvidia module source code -- os-interface.c I observed call to os_map_kernel_space being made. The bug may be in calling with wrong mode for opregion (the term used in above commits)

Edit:
Is changing NV_IOREMAP_NOCACHE(vaddr, start, size_bytes) to NV_IOREMAP(vaddr, start, size_bytes) for NV_MEMORY_DEFAULT going to fix this ?

Re: [BUG] Ioremap error with nvidia in 2.6.38-rc6
 

I'm seeing these errors as well, using nvidia 270.29 + 2.6.38-rc6-based kernel (built for Lucid x86-64 by Ubuntu kernel PPA).

[ 10.560094] ioremap error for 0xbf67c000-0xbf67d000, requested 0x10, got 0x0
[ 10.560127] ioremap error for 0xbf76d000-0xbf76e000, requested 0x10, got 0x0
[ 10.560130] ioremap error for 0xbf76d000-0xbf76e000, requested 0x10, got 0x0
[ 10.560133] ioremap error for 0xbf76d000-0xbf76e000, requested 0x10, got 0x0
[ 10.560136] ioremap error for 0xbf76d000-0xbf76e000, requested 0x10, got 0x0
[ 10.560139] ioremap error for 0xbf766000-0xbf767000, requested 0x10, got 0x0
[ 10.560142] ioremap error for 0xbf74d000-0xbf74e000, requested 0x10, got 0x0

Re: [BUG] Ioremap error with nvidia in 2.6.38-rc6
 

Seeing the same, 260.19.36, 2.6.38rc6.
Funny thing though, I'm seeing this on an AMD machine, but the same driver/kernel combo works just fine on a Xeon workstation.

rprabhu,

Have you had any luck finding which io*remap call fails?

- Gilboa

Re: [BUG] Ioremap error with nvidia in 2.6.38-rc6
 

FWIW:

$ cat /var/log/messages | grep ioremap
Mar 13 09:21:13 gilboa-wx-dev kernel: [ 93.732328] ioremap error for 0xbfcf3000-0xbfcf4000, requested 0x10, got 0x0
Mar 13 22:53:26 gilboa-wx-dev kernel: [48826.547871] ioremap error for 0xbfcf3000-0xbfcf4000, requested 0x10, got 0x0
$ cat /proc/iomem | grep bfcf3000
bfcf3000-bfcfffff : ACPI Tables

Re: [BUG] Ioremap error with nvidia in 2.6.38-rc6
 

It is not related to Intel in anyway. I just quoted the Intel commit to show similarity. You can look at os_map_kernel_space function in os-interface.c to see the callpoints. I think it may require a fix in the closed part of the driver. Also, related to your latter comment, yes, it is related to ACPI (check the other commit in my comment which caused this).

Re: [BUG] Ioremap error with nvidia in 2.6.38-rc6
 

Has this bug been fixed ? It seems to be crashing the system last time I used (which was rc8). This is important since .38 has been released and distro packagers will be blocked on this.

Re: [BUG] Ioremap error with nvidia in 2.6.38-rc6
 

A bug has been filed and we'll address the problem in a future release. It shouldn't cause any crashes - the mapping request's memory type is modified to match the kernel's mappings' memory type.

Re: [BUG] Ioremap error with nvidia in 2.6.38-rc6
 

Good to hear that, thanks. I had crash only once with it (of course i switched back to 37 after crash). Another place (and the reason why I presumed the crash was due to it) it caused a nuisance of sorts was when using OSSv4 for sound, it was causing a lot of crackling noise in the speaker while playing music, with ALSA I have had no such issues though (but crash happened when using ALSA).

Re: [BUG] Ioremap error with nvidia in 2.6.38-rc6
 

Edit: Correction, The crash was not related to nvidia, but I have seen those Xid messages in my dmesg nevertheless.


My laptop crashed again (hard crash, no sysrq possible, so most probably graphics related).

This may be related

Above message was in my kernel log. That looks to be related to nvidia.

I am also attaching a bug report generated from nvidia-bug-report.

Re: [BUG] Ioremap error with nvidia in 2.6.38-rc6
 

Thus far, no crashes on my side - only very slow performance. (DRI is enabled)

- Gilboa

Re: [BUG] Ioremap error with nvidia in 2.6.38-rc6
 

with 2.6.38 and 270.41.06 I also have the

may be due to this my usb wireless keyboard doesn't work

Re: [BUG] Ioremap error with nvidia in 2.6.38-rc6
 

We fixed some issues that we believe to be related to this in 270.41.19 and 275.09.