Hello All,
I am trying to pass-through a GPU PCIe ATI Radeon to VM. Here is a log on VM.
prasad@prasad-virtual-machine:~$ dmesg | grep -i -e drm -e radeon
[ 2.162294] [drm] Initialized drm 1.1.0 20060810
[ 2.459594] [drm] radeon defaulting to kernel modesetting.
[ 2.459596] [drm] radeon kernel modesetting enabled.
[ 2.766698] radeon 0000:00:04.0: PCI INT A -> Link[LNKD] -> GSI 10
(level, high) -> IRQ 10
[ 2.766734] radeon 0000:00:04.0: setting latency timer to 64
[ 2.783512] [drm] initializing kernel modesetting (RV380 0x1002:0x5B64).
[ 2.792407] [drm] register mmio base: 0x40000000
[ 2.792408] [drm] register mmio size: 65536
[ 2.797177] [drm] Generation 2 PCI interface, using max accessible memory
[ 2.797275] radeon 0000:00:04.0: VRAM: 128M 0x00000000F8000000 -
0x00000000FFFFFFFF (128M used)
[ 2.797284] radeon 0000:00:04.0: GTT: 512M 0x00000000D8000000 -
0x00000000F7FFFFFF
[ 2.798370] radeon 0000:00:04.0: irq 40 for MSI/MSI-X
[ 2.870703] radeon 0000:00:04.0: radeon: using MSI.
[ 3.151162] [drm] radeon: irq initialized.
[ 3.151539] [drm] Detected VRAM RAM=128M, BAR=128M
[ 3.151541] [drm] RAM width 128bits DDR
[ 3.151610] [drm] radeon: 128M of VRAM memory ready
[ 3.151611] [drm] radeon: 512M of GTT memory ready.
[ 3.151627] [drm] GART: num cpu pages 131072, num gpu pages 131072
[ 3.152701] [drm] radeon: 1 quad pipes, 1 Z pipes initialized.
[ 3.544943] [drm] PCIE GART of 512M enabled (table at 0xF8040000).
[ 3.548479] radeon 0000:00:04.0: WB enabled
[ 3.549020] [drm] Loading R300 Microcode
[ 3.554278] [drm] radeon: ring at 0x00000000D8001000
[ 3.778476] [drm:r100_ring_test] *ERROR* radeon: ring test failed
(sracth(0x15E4)=0xCAFEDEAD)
[ 3.781010] [drm:r100_cp_init] *ERROR* radeon: cp isn't working (-22).
[ 3.782542] radeon 0000:00:04.0: failled initializing CP (-22).
[ 3.784006] radeon 0000:00:04.0: Disabling GPU acceleration
[ 3.793709] [drm] radeon: cp finalized
[ 3.834875] radeon 0000:00:04.0: ffff8800320b4c00 unpin not necessary
[ 3.841759] [drm] Radeon Display Connectors
[ 3.841766] [drm] Connector 0:
[ 3.841771] [drm] VGA
[ 3.841777] [drm] DDC: 0x60 0x60 0x60 0x60 0x60 0x60 0x60 0x60
[ 3.841781] [drm] Encoders:
[ 3.841785] [drm] CRT1: INTERNAL_DAC1
[ 3.841788] [drm] Connector 1:
[ 3.841791] [drm] DVI-I
[ 3.841794] [drm] HPD1
[ 3.841799] [drm] DDC: 0x64 0x64 0x64 0x64 0x64 0x64 0x64 0x64
[ 3.841803] [drm] Encoders:
[ 3.841806] [drm] CRT2: INTERNAL_DAC2
[ 3.841809] [drm] DFP1: INTERNAL_TMDS1
[ 6.158753] [drm] fb mappable at 0xF8040000
[ 6.158756] [drm] vram apper at 0xF8000000
[ 6.158757] [drm] size 5242880
[ 6.158758] [drm] fb depth is 24
[ 6.158759] [drm] pitch is 5120
[ 13.914196] fb0: radeondrmfb frame buffer device
[ 13.914198] drm: registered panic notifier
[ 13.914683] [drm] Initialized radeon 2.7.0 20080528 for
0000:00:04.0 on minor 0
I was previously seeing a problem with the ROM BIOS, but I could solve
it by passing a correct BIOS file in function assigned_initfn. For now
I am using hardcoded file name in the code.
Can anyone help me with debugging of following errors?
[ 3.778476] [drm:r100_ring_test] *ERROR* radeon: ring test failed
(sracth(0x15E4)=0xCAFEDEAD)
[ 3.781010] [drm:r100_cp_init] *ERROR* radeon: cp isn't working (-22).
3444 WREG32(scratch, 0xCAFEDEAD);
3445 r = radeon_ring_lock(rdev, 2);
3446 if (r) {
3447 DRM_ERROR("radeon: cp failed to lock ring (%d).\n", r);
3448 radeon_scratch_free(rdev, scratch);
3449 return r;
3450 }
3451 radeon_ring_write(rdev, PACKET0(scratch, 0));
3452 radeon_ring_write(rdev, 0xDEADBEEF);
3453 radeon_ring_unlock_commit(rdev);
3454 for (i = 0; i < rdev->usec_timeout; i++) {
3455 tmp = RREG32(scratch);
3456 if (tmp == 0xDEADBEEF) {
3457 break;
3458 }
3459 DRM_UDELAY(1);
3460 }
3461 if (i < rdev->usec_timeout) {
3462 DRM_INFO("ring test succeeded in %d usecs\n", i);
3463 } else {
3464 DRM_ERROR("radeon: ring test failed (sracth(0x%04X)=0x%08X)\n",
3465 scratch, tmp);
3466 r = -EINVAL;
3467 }
It seems like, on line 3452 code writes DEADBEEF ins some ring and on
line 3455-3456 it reads whatever has been written on ring and it fails
in this case as it reads back 0xCAFEDEAD
How can I debug this VM problem?
BTW, the assigned device is listed in lspci output
prasad@prasad-virtual-machine:~$ lspci | grep ATI
00:04.0 Display controller: ATI Technologies Inc RV370 5B64 [FireGL
V3100 (PCIE)] (rev 80)
I also noticed following log on the host machine.
[ 6042.798880] kvm: 1566: cpu0 unimplemented perfctr wrmsr:
0xc0010004data 0xabcd
[ 6104.970165] pci-stub 0000:02:00.0: restoring config space at
offset0x1 (was 0x100400, writing 0x100007)
[ 6105.530290] assign device 0:2:0.0
[ 6105.530351] pci-stub 0000:02:00.0: irq 88 for MSI/MSI-X
[ 6105.740225] pci-stub 0000:02:00.0: irq 88 for MSI/MSI-X
[ 6105.870203] pci-stub 0000:02:00.0: irq 88 for MSI/MSI-X
[ 6110.575658] kvm: 2264: cpu0 unimplemented perfctr wrmsr:
0xc0010004data 0xabcd
[ 6110.874223] pci-stub 0000:02:00.0: irq 88 for MSI/MSI-X
[ 6113.230216] pci-stub 0000:02:00.0: irq 88 for MSI/MSI-X
[ 6113.550222] pci-stub 0000:02:00.0: irq 88 for MSI/MSI-X
[ 6113.750205] pci-stub 0000:02:00.0: irq 88 for MSI/MSI-X
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