[Intel-gfx] ✗ Fi.CI.IGT: failure for drm/i915: stop using swiotlb (rev6)

[Tvrtko Ursulin]

On 28/07/2022 09:01, Patchwork wrote:

[snip]

>         Possible regressions
> 
>   * igt at gem_mmap_offset@clear:
>       o shard-iclb: PASS
>         <https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_11946/shard-iclb6/igt@gem_mmap_offset@clear.html>
>         -> INCOMPLETE
>         <https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_106589v6/shard-iclb1/igt@gem_mmap_offset@clear.html>

What was supposed to be a simple patch.. a storm of errors like:

  DMAR: ERROR: DMA PTE for vPFN 0x3d00000 already set (to 2fd7ff003 not 2fd7ff003)
  ------------[ cut here ]------------
  WARNING: CPU: 6 PID: 1254 at drivers/iommu/intel/iommu.c:2278 __domain_mapping.cold.93+0x32/0x39<>
  Modules linked in: vgem drm_shmem_helper snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_cod>
  CPU: 6 PID: 1254 Comm: gem_mmap_offset Not tainted 5.19.0-rc8-Patchwork_106589v6-g0e9c43d76a14+ #>
  Hardware name: Intel Corporation Ice Lake Client Platform/IceLake U DDR4 SODIMM PD RVP TLC, BIOS >
  RIP: 0010:__domain_mapping.cold.93+0x32/0x39
  Code: fe 48 c7 c7 28 32 37 82 4c 89 5c 24 08 e8 e4 61 fd ff 8b 05 bf 8e c9 00 4c 8b 5c 24 08 85 c>
  RSP: 0000:ffffc9000037f9c0 EFLAGS: 00010202
  RAX: 0000000000000004 RBX: ffff8881117b4000 RCX: 0000000000000001
  RDX: 0000000000000000 RSI: ffffffff82320b25 RDI: 00000000ffffffff
  RBP: 0000000000000001 R08: 0000000000000000 R09: c0000000ffff7fff
  R10: 0000000000000001 R11: 00000000002fd7ff R12: 00000002fd7ff003
  R13: 0000000000076c01 R14: ffff8881039ee800 R15: 0000000003d00000
  FS:  00007f2863c1d700(0000) GS:ffff88849fd00000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  CR2: 00007f2692c53000 CR3: 000000011c440006 CR4: 0000000000770ee0
  PKRU: 55555554
  Call Trace:
   <TASK>
   intel_iommu_map_pages+0xb7/0xe0
   __iommu_map+0xe0/0x310
   __iommu_map_sg+0xa2/0x140
   iommu_dma_map_sg+0x2ef/0x4e0
   __dma_map_sg_attrs+0x64/0x70
   dma_map_sg_attrs+0x5/0x20
   i915_gem_gtt_prepare_pages+0x56/0x70 [i915]
   shmem_get_pages+0xe3/0x360 [i915]
   ____i915_gem_object_get_pages+0x32/0x100 [i915]
   __i915_gem_object_get_pages+0x8d/0xa0 [i915]
   vm_fault_gtt+0x3d0/0x940 [i915]
   ? ptlock_alloc+0x15/0x40
   ? rt_mutex_debug_task_free+0x91/0xa0
   __do_fault+0x30/0x180
   do_fault+0x1c4/0x4c0
   __handle_mm_fault+0x615/0xbe0
   handle_mm_fault+0x75/0x1c0
   do_user_addr_fault+0x1e7/0x670
   exc_page_fault+0x62/0x230
   asm_exc_page_fault+0x22/0x30

No idea. Maybe try CI kernel config on your Tigerlake?

Regards,

Tvrtko