| Bug ID | 104825 |
|---|---|
| Summary | [amdgpu] [drm:gfx_v8_0_hw_fini] *ERROR* KCQ disabled failed (scratch(0xC040)=0x00000000) when unbinding |
| Product | DRI |
| Version | XOrg git |
| Hardware | x86-64 (AMD64) |
| OS | Linux (All) |
| Status | NEW |
| Severity | normal |
| Priority | medium |
| Component | DRM/AMDgpu |
| Assignee | dri-devel@lists.freedesktop.org |
| Reporter | mlen@mlen.pl |
I use two amdgpu rx480 cards. During boot one of them is rebound to vfio-pci
driver using the following script:
pci_ids=("0000:03:00.0" "0000:03:00.1")
for id in "${pci_ids[@]}"; do
vendor="$(cat "/sys/bus/pci/devices/$id/vendor")"
device="$(cat "/sys/bus/pci/devices/$id/device")"
if [ -e "/sys/bus/pci/devices/$id/driver/unbind" ]; then
echo "$id" >"/sys/bus/pci/devices/$id/driver/unbind"
fi
echo "$vendor $device" >/sys/bus/pci/drivers/vfio-pci/new_id
done
Starting from Linux 4.15 with amdgpu DC enabled (I wanted to use it for HDMI
audio), unbind operation causes general protection failure:
[ 68.011473] [drm] amdgpu: finishing device.
[ 68.377945] [drm:gfx_v8_0_hw_fini] *ERROR* KCQ disabled failed
(scratch(0xC040)=0x00000000)
[ 68.575193] [drm:gfx_v8_0_hw_fini] *ERROR* KCQ disabled failed
(scratch(0xC040)=0x00000000)
[ 68.770107] [drm:gfx_v8_0_hw_fini] *ERROR* KCQ disabled failed
(scratch(0xC040)=0x00000000)
[ 68.971775] [drm:gfx_v8_0_hw_fini] *ERROR* KCQ disabled failed
(scratch(0xC040)=0x00000000)
[ 69.164265] [drm:gfx_v8_0_hw_fini] *ERROR* KCQ disabled failed
(scratch(0xC040)=0x00000000)
[ 69.350089] [drm:gfx_v8_0_hw_fini] *ERROR* KCQ disabled failed
(scratch(0xC040)=0x00000000)
[ 69.538302] [drm:gfx_v8_0_hw_fini] *ERROR* KCQ disabled failed
(scratch(0xC040)=0x00000000)
[ 69.729260] [drm:gfx_v8_0_hw_fini] *ERROR* KCQ disabled failed
(scratch(0xC040)=0x00000000)
[ 69.729733] general protection fault: 0000 [#1] PREEMPT SMP PTI
[ 69.730901] Modules linked in:
[ 69.731936] CPU: 2 PID: 3934 Comm: openrc-run.sh Not tainted 4.15.0-gentoo
#2
[ 69.733009] Hardware name: ASUSTeK COMPUTER INC. Z10PE-D16 WS/Z10PE-D16 WS,
BIOS 3407 03/10/2017
[ 69.734240] RIP: 0010:dm_read_reg_func.isra.0+0x3/0xc
[ 69.735314] RSP: 0018:ffffa80d8bd4fc40 EFLAGS: 00010282
[ 69.736353] RAX: ccea607dac10c354 RBX: ffff95af35bfca80 RCX:
0000000180200008
[ 69.737408] RDX: 0000000180200009 RSI: 0000000000005c02 RDI:
ffff95af362b91c0
[ 69.738494] RBP: ffff95af35b75c90 R08: 0000000000000001 R09:
ffffffffb30fced2
[ 69.739561] R10: ffff95af2f770a40 R11: 00000000ffffff80 R12:
ffff95af35f30100
[ 69.740638] R13: 0000000000000000 R14: ffff95af358a3c20 R15:
ffff95bf2d5f9c20
[ 69.742007] FS: 00007fe7530af740(0000) GS:ffff95af3da00000(0000)
knlGS:0000000000000000
[ 69.743083] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 69.744134] CR2: 000000c420870008 CR3: 0000001027426003 CR4:
00000000003606e0
[ 69.745190] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 69.746246] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[ 69.747320] Call Trace:
[ 69.748359] destroy+0x21/0x9c
[ 69.749395] dal_i2caux_destruct+0x6f/0xab
[ 69.750459] destroy+0x15/0x27
[ 69.751495] dal_i2caux_destroy+0x26/0x2f
[ 69.752537] destruct+0x86/0xfd
[ 69.753571] dc_destroy+0x11/0x22
[ 69.754626] dm_hw_fini+0x1e/0x22
[ 69.755632] amdgpu_fini+0xf3/0x2d6
[ 69.756616] amdgpu_device_fini+0x5c/0x158
[ 69.757597] amdgpu_driver_unload_kms+0x6b/0x7e
[ 69.758601] drm_dev_unregister+0x4c/0xc6
[ 69.759584] amdgpu_pci_remove+0x19/0x37
[ 69.760576] pci_device_remove+0x3b/0x8b
[ 69.761563] device_release_driver_internal+0x125/0x1f9
[ 69.762580] unbind_store+0x60/0x90
[ 69.763568] kernfs_fop_write+0x111/0x159
[ 69.764557] __vfs_write+0x33/0xd7
[ 69.765543] ? preempt_count_sub+0x8b/0x94
[ 69.766552] ? __sb_start_write+0xc0/0x180
[ 69.767525] vfs_write+0xa5/0xe2
[ 69.768490] SyS_write+0x5f/0xa3
[ 69.769439] do_syscall_64+0x72/0x81
[ 69.770419] entry_SYSCALL64_slow_path+0x25/0x25
[ 69.771373] RIP: 0033:0x7fe7529a1408
[ 69.772324] RSP: 002b:00007ffe1885c200 EFLAGS: 00000246 ORIG_RAX:
0000000000000001
[ 69.773300] RAX: ffffffffffffffda RBX: 000000000000000d RCX:
00007fe7529a1408
[ 69.774290] RDX: 000000000000000d RSI: 0000558994641890 RDI:
0000000000000001
[ 69.775290] RBP: 0000558994641890 R08: 000000000000000a R09:
00005589946475f0
[ 69.776260] R10: 000000000000009b R11: 0000000000000246 R12:
000000000000000d
[ 69.777248] R13: 0000000000000001 R14: 00007fe752c6e740 R15:
000000000000000d
[ 69.778244] Code: f7 74 24 04 89 43 5c 48 8b 4c 24 08 65 48 33 0c 25 28 00
00 00 4c 89 e0 74 05 e8 39 58 9e ff 48 83 c4 10 5b 5d 41 5c c3 48 8b 07 <48> 8b
40 30 e9 03 4a 70 00 0f 1f 44 00 00 48 8b 47 30 8b 70 04
[ 69.779406] RIP: dm_read_reg_func.isra.0+0x3/0xc RSP: ffffa80d8bd4fc40
[ 69.780491] ---[ end trace 6aa4681ba3a43ec3 ]---
[ 71.815503] [drm:amdgpu_fill_buffer] *ERROR* Trying to clear memory with
ring turned off.
[ 71.899258] amdgpu 0000:03:00.0: vgaarb: changed VGA decodes:
olddecodes=io+mem,decodes=none:owns=none
[ 71.899263] amdgpu 0000:02:00.0: vgaarb: changed VGA decodes:
olddecodes=io+mem,decodes=none:owns=none
[ 72.217918] [drm:amdgpu_fill_buffer] *ERROR* Trying to clear memory with
ring turned off.
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