[Bug 104982] [IGT][CNL Only] igt at debugfs_test@read_all_entries dmesg-warn WARN_ON_ONCE(mcr & ((((3) & 3) << 26) | (((3) & 3) << 24)))

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104982

--- Comment #3 from Elizabeth <elizabethx.de.la.torre.mena at intel.com> ---
As I thought, I'm able to replicate the warn only in the CNL-2, which has a
newer BIOS version than the CNL-1. I will update CNL-1's BIOS and check if
results are the same.

(02:35 PM) [gfx at CNL-2] [tests]$ : time sudo -E ./debugfs_test --r
read_all_entries
IGT-Version: 1.21-g37bd27f (x86_64) (Linux:
4.16.0-rc1-drm-intel-qa-ww7-commit-28dc2a5+ x86_64)
Subtest read_all_entries: SUCCESS (1.330s)

[  +0.000430] [drm:sandybridge_pcode_read [i915]] warning: pcode (read from
mbox 5) mailbox access failed for i915_drpc_info [i915]: -6
[  +0.000138] ------------[ cut here ]------------
[  +0.000002] WARN_ON_ONCE(mcr & ((((3) & 3) << 26) | (((3) & 3) << 24)))
[  +0.000120] WARNING: CPU: 0 PID: 3389 at
drivers/gpu/drm/i915/intel_engine_cs.c:757
intel_engine_get_instdone+0x39c/0x3f0 [i915]
[  +0.000001] Modules linked in: snd_hda_codec_hdmi asix usbnet mii
ip6table_filter ip6_tables cmac iptable_filter bnep 8250_dw binfmt_misc
nls_iso8859_1 snd_soc_skl snd_soc_skl_ipc snd_soc_sst_ipc snd_soc_sst_dsp
snd_hda_ext_core snd_soc_acpi snd_hda_codec_realtek snd_hda_codec_generic
snd_soc_core snd_compress snd_pcm_dmaengine ac97_bus x86_pkg_temp_thermal
intel_powerclamp coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul
snd_hda_intel ghash_clmulni_intel snd_hda_codec snd_hda_core pcbc snd_hwdep
snd_pcm snd_seq_midi aesni_intel snd_seq_midi_event aes_x86_64 crypto_simd
glue_helper cryptd snd_rawmidi snd_seq serio_raw wmi_bmof snd_seq_device
snd_timer input_leds snd btusb soundcore iwlwifi btrtl btbcm btintel shpchp
bluetooth idma64 virt_dma intel_lpss_pci cfg80211 intel_lpss ecdh_generic
[  +0.000070]  intel_pch_thermal tpm_crb mac_hid acpi_pad parport_pc ppdev lp
parport ip_tables x_tables autofs4 hid_generic usbhid hid dwc3 udc_core ulpi
i915 e1000e dwc3_pci wmi video
[  +0.000026] CPU: 0 PID: 3389 Comm: debugfs_test Tainted: G     U          
4.16.0-rc1-drm-intel-qa-ww7-commit-28dc2a5+ #1
[  +0.000003] Hardware name: Intel Corporation CannonLake Client
Platform/CannonLake Y LPDDR4 RVP, BIOS CNLSFWR1.R00.X122.B01.1801151045
01/15/2018
[  +0.000063] RIP: 0010:intel_engine_get_instdone+0x39c/0x3f0 [i915]
[  +0.000003] RSP: 0018:ffffb7e103ccfc98 EFLAGS: 00010082
[  +0.000003] RAX: 0000000000000000 RBX: ffff919dd9ba8000 RCX: ffffffff8da58208
[  +0.000002] RDX: 0000000000000001 RSI: 0000000000000092 RDI: 0000000000000002
[  +0.000002] RBP: ffffb7e103ccfd30 R08: 000000000000003b R09: 0000000000000a07
[  +0.000002] R10: 00000000ffffffff R11: 0000000000000a07 R12: 0000000000000001
[  +0.000002] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000011000000
[  +0.000003] FS:  00007fde5299ba00(0000) GS:ffff919def800000(0000)
knlGS:0000000000000000
[  +0.000002] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  +0.000002] CR2: 00007fa088fb7000 CR3: 000000025e0e0006 CR4: 0000000000660ef0
[  +0.000002] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  +0.000002] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  +0.000001] PKRU: 55555554
[  +0.000002] Call Trace:
[  +0.000054]  i915_hangcheck_info+0x10e/0x400 [i915]
[  +0.000011]  ? create_object+0x24e/0x300
[  +0.000007]  seq_read+0xad/0x420
[  +0.000008]  full_proxy_read+0x4a/0x70
[  +0.000006]  __vfs_read+0x33/0x160
[  +0.000007]  vfs_read+0x8e/0x130
[  +0.000005]  SyS_read+0x52/0xc0
[  +0.000007]  do_syscall_64+0x6b/0x120
[  +0.000008]  entry_SYSCALL_64_after_hwframe+0x21/0x86
[  +0.000003] RIP: 0033:0x7fde518a9690
[  +0.000002] RSP: 002b:00007ffc71877218 EFLAGS: 00000246 ORIG_RAX:
0000000000000000
[  +0.000004] RAX: ffffffffffffffda RBX: 000055e554b39cfb RCX: 00007fde518a9690
[  +0.000002] RDX: 0000000000000200 RSI: 00007ffc71877240 RDI: 0000000000000006
[  +0.000002] RBP: 0000000000000006 R08: 000055e554af9b50 R09: 0000000000000000
[  +0.000001] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc71877240
[  +0.000002] R13: 000055e554b39770 R14: 0000000000000005 R15: 00007ffc71877230
[  +0.000003] Code: 0d fe ff ff 80 3d 75 b6 16 00 00 0f 85 93 fe ff ff 48 c7 c6
18 20 68 c0 48 c7 c7 3c c4 66 c0 c6 05 5a b6 16 00 01 e8 84 ba 2d cc <0f> ff e9
72 fe ff ff 80 3d 47 b6 16 00 00 0f 85 51 ff ff ff 48 
[  +0.000067] ---[ end trace 9d3219a9ed0bffa4 ]---

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