Error message on RV710: reserve failed for wait

[Jean Delvare <khali@linux-fr.org>]

Hi all,

I am running kernel 2.6.36-rc6 on a Radeon HD4350 (RV710), and I see
the following error messages in the logs:

Sep 30 14:09:27 endymion kernel: [21556.560593] radeon 0000:07:00.0: ffff88007c334000 reserve failed for wait
Sep 30 14:09:29 endymion kernel: [21558.253859] radeon 0000:07:00.0: ffff88007c334000 reserve failed for wait

Sometimes that's just one or two of these, sometimes a bunch of them. I
didn't notice any major problem so far. What kind of issue may result
from this error? I see the message comes from function radeon_bo_wait()
but I have no idea what this function does.

Here are the messages related to my Radeon card as found in the kernel
boot log:

[drm] radeon defaulting to kernel modesetting.
[drm] radeon kernel modesetting enabled.
  alloc irq_desc for 30 on node -1
  alloc kstat_irqs on node -1
radeon 0000:07:00.0: PCI INT A -> GSI 30 (level, low) -> IRQ 30
radeon 0000:07:00.0: setting latency timer to 64
[drm] initializing kernel modesetting (RV710 0x1002:0x954F).
[drm] register mmio base: 0xFBEE0000
[drm] register mmio size: 65536
ATOM BIOS: 113
radeon 0000:07:00.0: VRAM: 512M 0x00000000 - 0x1FFFFFFF (512M used)
radeon 0000:07:00.0: GTT: 512M 0x20000000 - 0x3FFFFFFF
[drm] Detected VRAM RAM=512M, BAR=256M
[drm] RAM width 64bits DDR
[TTM] Zone  kernel: Available graphics memory: 1024276 kiB.
[TTM] Initializing pool allocator.
[drm] radeon: 512M of VRAM memory ready
[drm] radeon: 512M of GTT memory ready.
  alloc irq_desc for 64 on node -1
  alloc kstat_irqs on node -1
radeon 0000:07:00.0: irq 64 for MSI/MSI-X
radeon 0000:07:00.0: radeon: using MSI.
[drm] radeon: irq initialized.
[drm] GART: num cpu pages 131072, num gpu pages 131072
[drm] Loading RV710 Microcode
[drm] ring test succeeded in 1 usecs
[drm] radeon: ib pool ready.
[drm] ib test succeeded in 0 usecs
[drm] Enabling audio support
failed to evaluate ATIF got AE_BAD_PARAMETER
[drm] Default TV standard: NTSC
[drm] Default TV standard: NTSC
[drm] Radeon Display Connectors
[drm] Connector 0:
[drm]	VGA
[drm]	DDC: 0x7e50 0x7e50 0x7e54 0x7e54 0x7e58 0x7e58 0x7e5c 0x7e5c
[drm]	Encoders:
[drm]	  CRT2: INTERNAL_KLDSCP_DAC2
[drm] Connector 1:
[drm]	HDMI-A
[drm]	HPD1
[drm]	DDC: 0x7e40 0x7e40 0x7e44 0x7e44 0x7e48 0x7e48 0x7e4c 0x7e4c
[drm]	Encoders:
[drm]	  DFP1: INTERNAL_UNIPHY
[drm] Connector 2:
[drm]	DVI-I
[drm]	HPD4
[drm]	DDC: 0x7f10 0x7f10 0x7f14 0x7f14 0x7f18 0x7f18 0x7f1c 0x7f1c
[drm]	Encoders:
[drm]	  CRT1: INTERNAL_KLDSCP_DAC1
[drm]	  DFP2: INTERNAL_UNIPHY2
[drm] Internal thermal controller with fan control
[drm] radeon: power management initialized
[drm] fb mappable at 0xD0142000
[drm] vram apper at 0xD0000000
[drm] size 8294400
[drm] fb depth is 24
[drm]	 pitch is 7680
checking generic (d0000000 1000000) vs hw (d0000000 20000000)
fb: conflicting fb hw usage radeondrmfb vs VESA VGA - removing generic driver
Console: switching to colour dummy device 80x25
Console: switching to colour frame buffer device 240x67
fb0: radeondrmfb frame buffer device
drm: registered panic notifier
[drm] Initialized radeon 2.6.0 20080528 for 0000:07:00.0 on minor 0

The only thing out of the ordinary I could spot is the "failed to
evaluate ATIF" message, but apparently it is only a debug message, so I
doubt it is related (but it would certainly be nice to solve that
problem too.)

Let me know if I can provide more information, or help in any way with
debugging this issue.

Thanks,
-- 
Jean Delvare