AuxXxilium/linux_dsm_epyc7002
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a95f3ac21d
linux_dsm_epyc7002/drivers/gpu/drm/i915/gem
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Chris Wilson a95f3ac21d drm/i915/gem: Remove object_is_locked assertion from unpin_from_display_plane 
Since moving the obj->vma.list to a spin_lock, and the vm->bound_list to
its vm->mutex, along with tracking shrinkable status under its own
spinlock, we no long require the object to be locked by the caller.

This is fortunate as it appears we can be called with the lock along an
error path in flipping:

<4> [139.942851] WARN_ON(debug_locks && !lock_is_held(&(&((obj)->base.resv)->lock.base)->dep_map))
<4> [139.943242] WARNING: CPU: 0 PID: 1203 at drivers/gpu/drm/i915/gem/i915_gem_domain.c:405 i915_gem_object_unpin_from_display_plane+0x70/0x130 [i915]
<4> [139.943263] Modules linked in: snd_hda_intel i915 vgem snd_hda_codec_realtek snd_hda_codec_generic coretemp snd_intel_dspcfg snd_hda_codec snd_hwdep snd_hda_core r8169 lpc_ich snd_pcm realtek prime_numbers [last unloaded: i915]
<4> [139.943347] CPU: 0 PID: 1203 Comm: kms_flip Tainted: G     U            5.6.0-gd0fda5c2cf3f1-drmtip_474+ #1
<4> [139.943363] Hardware name:  /D510MO, BIOS MOPNV10J.86A.0311.2010.0802.2346 08/02/2010
<4> [139.943589] RIP: 0010:i915_gem_object_unpin_from_display_plane+0x70/0x130 [i915]
<4> [139.943589] Code: 85 28 01 00 00 be ff ff ff ff 48 8d 78 60 e8 d7 9b f0 e2 85 c0 75 b9 48 c7 c6 50 b9 38 c0 48 c7 c7 e9 48 3c c0 e8 20 d4 e9 e2 <0f> 0b eb a2 48 c7 c1 08 bb 38 c0 ba 0a 01 00 00 48 c7 c6 88 a3 35
<4> [139.943589] RSP: 0018:ffffb774c0603b48 EFLAGS: 00010282
<4> [139.943589] RAX: 0000000000000000 RBX: ffff9a142fa36e80 RCX: 0000000000000006
<4> [139.943589] RDX: 000000000000160d RSI: ffff9a142c1a88f8 RDI: ffffffffa434a64d
<4> [139.943589] RBP: ffff9a1410a513c0 R08: ffff9a142c1a88f8 R09: 0000000000000000
<4> [139.943589] R10: 0000000000000000 R11: 0000000000000000 R12: ffff9a1436ee94b8
<4> [139.943589] R13: 0000000000000001 R14: 00000000ffffffff R15: ffff9a1410960000
<4> [139.943589] FS:  00007fc73a744e40(0000) GS:ffff9a143da00000(0000) knlGS:0000000000000000
<4> [139.943589] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4> [139.943589] CR2: 00007fc73997e098 CR3: 000000002f5fe000 CR4: 00000000000006f0
<4> [139.943589] Call Trace:
<4> [139.943589]  intel_pin_and_fence_fb_obj+0x1c9/0x1f0 [i915]
<4> [139.943589]  intel_plane_pin_fb+0x3f/0xd0 [i915]
<4> [139.943589]  intel_prepare_plane_fb+0x13b/0x5c0 [i915]
<4> [139.943589]  drm_atomic_helper_prepare_planes+0x85/0x110
<4> [139.943589]  intel_atomic_commit+0xda/0x390 [i915]
<4> [139.943589]  drm_atomic_helper_page_flip+0x9c/0xd0
<4> [139.943589]  ? drm_event_reserve_init+0x46/0x60
<4> [139.943589]  drm_mode_page_flip_ioctl+0x587/0x5d0

This completes the symmetry lost in commit 8b1c78e06e ("drm/i915: Avoid
calling i915_gem_object_unbind holding object lock").

Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/1743
Fixes: 8b1c78e06e ("drm/i915: Avoid calling i915_gem_object_unbind holding object lock")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Andi Shyti <andi.shyti@intel.com>
Cc: <stable@vger.kernel.org> # v5.6+
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200420125356.26614-1-chris@chris-wilson.co.uk
2020-04-20 16:23:24 +01:00
..
selftests drm/i915: remove redundant assignment to variable err 2020-04-09 20:19:31 +01:00
i915_gem_busy.c drm/i915: Align engine->uabi_class/instance with i915_drm.h 2020-01-20 09:13:01 +00:00
i915_gem_clflush.c drm/i915: Hold reference to intel_frontbuffer as we track activity 2019-12-18 12:09:57 +00:00
i915_gem_clflush.h
i915_gem_client_blt.c drm/i915: Apply i915_request_skip() on submission 2020-03-04 14:29:50 +00:00
i915_gem_client_blt.h
i915_gem_context_types.h drm/i915/gem: use spinlock_t instead of struct spinlock 2020-02-19 15:08:49 +02:00
i915_gem_context.c drm/i915/gem: Wait until the context is finally retired before releasing engines 2020-04-06 19:48:06 +01:00
i915_gem_context.h drm/i915/perf: introduce global sseu pinning 2020-03-17 15:27:55 +02:00
i915_gem_dmabuf.c drm/i915: Skip CPU synchronisation on dmabuf attachments 2020-02-11 00:16:15 +00:00
i915_gem_domain.c drm/i915/gem: Remove object_is_locked assertion from unpin_from_display_plane 2020-04-20 16:23:24 +01:00
i915_gem_execbuffer.c drm/i915/gem: Promote 'remain' to unsigned long 2020-04-07 14:43:58 +01:00
i915_gem_fence.c
i915_gem_internal.c drm/i915: significantly reduce the use of <drm/i915_drm.h> 2020-02-27 08:35:09 +02:00
i915_gem_ioctls.h
i915_gem_lmem.c drm/i915/gem: Support discontiguous lmem object maps 2020-01-03 11:26:01 +00:00
i915_gem_lmem.h drm/i915/gem: Support discontiguous lmem object maps 2020-01-03 11:26:01 +00:00
i915_gem_mman.c drm/i915/gem: Mark up the racy read of the mmap_singleton 2020-03-11 12:00:02 +00:00
i915_gem_mman.h
i915_gem_object_blt.c drm/i915: Add Wa_1209644611:icl,ehl 2020-03-13 08:59:01 -07:00
i915_gem_object_blt.h
i915_gem_object_types.h drm/i915/gem: Drop cached obj->bind_count 2020-04-02 01:17:39 +01:00
i915_gem_object.c drm/i915/gem: Drop cached obj->bind_count 2020-04-02 01:17:39 +01:00
i915_gem_object.h drm/i915: significantly reduce the use of <drm/i915_drm.h> 2020-02-27 08:35:09 +02:00
i915_gem_pages.c drm/i915/gem: Drop cached obj->bind_count 2020-04-02 01:17:39 +01:00
i915_gem_phys.c drm/i915/phys: unconditionally call release_memory_region 2020-03-06 10:05:17 +00:00
i915_gem_pm.c drm/i915/gem: Make WARN* drm specific where drm_priv ptr is available 2020-01-22 17:52:39 +02:00
i915_gem_pm.h
i915_gem_region.c drm/i915/gem: Single page objects are naturally contiguous 2020-01-02 21:21:17 +00:00
i915_gem_region.h
i915_gem_shmem.c drm/i915/gem: Make WARN* drm specific where drm_priv ptr is available 2020-01-22 17:52:39 +02:00
i915_gem_shrinker.c drm/i915/gem: Drop cached obj->bind_count 2020-04-02 01:17:39 +01:00
i915_gem_shrinker.h
i915_gem_stolen.c drm/i915/stolen: prefer struct drm_device based logging 2020-04-08 13:49:35 +03:00
i915_gem_stolen.h drm/i915/display: Be explicit in handling the preallocated vma 2020-02-05 09:20:39 +00:00
i915_gem_throttle.c
i915_gem_tiling.c drm/i915: significantly reduce the use of <drm/i915_drm.h> 2020-02-27 08:35:09 +02:00
i915_gem_userptr.c drm/i915: significantly reduce the use of <drm/i915_drm.h> 2020-02-27 08:35:09 +02:00
i915_gem_wait.c
i915_gemfs.c
i915_gemfs.h