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drm/amdgpu/userq: pin mqd and fw object bo to avoid eviction

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mqd and fw objects are queue core objects which should remain
valid and never be unmapped and evicted for user queues to work
properly.

During eviction if these buffers are evicted the hw continue to
use the invalid addresses and caused page faults and system hung.

Signed-off-by: Sunil Khatri <sunil.khatri@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Sunil Khatri 2026-05-08 15:58:09 +05:30 committed by Alex Deucher
parent 3aab504106
commit a3bbf32a33
1 changed files with 10 additions and 3 deletions
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13
drivers/gpu/drm/amd/amdgpu/amdgpu_userq.c
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@ -504,16 +504,20 @@ int amdgpu_userq_create_object(struct amdgpu_userq_mgr *uq_mgr,
goto free_obj;
}
r = amdgpu_bo_pin(userq_obj->obj, AMDGPU_GEM_DOMAIN_GTT);
if (r)
goto unresv;
r = amdgpu_ttm_alloc_gart(&(userq_obj->obj)->tbo);
if (r) {
drm_file_err(uq_mgr->file, "Failed to alloc GART for userqueue object (%d)", r);
goto unresv;
goto unpin_bo;
}
r = amdgpu_bo_kmap(userq_obj->obj, &userq_obj->cpu_ptr);
if (r) {
drm_file_err(uq_mgr->file, "Failed to map BO for userqueue (%d)", r);
goto unresv;
goto unpin_bo;
}
userq_obj->gpu_addr = amdgpu_bo_gpu_offset(userq_obj->obj);
@ -521,11 +525,13 @@ int amdgpu_userq_create_object(struct amdgpu_userq_mgr *uq_mgr,
memset(userq_obj->cpu_ptr, 0, size);
return 0;
unpin_bo:
amdgpu_bo_unpin(userq_obj->obj);
unresv:
amdgpu_bo_unreserve(userq_obj->obj);
free_obj:
amdgpu_bo_unref(&userq_obj->obj);
return r;
}
@ -533,6 +539,7 @@ void amdgpu_userq_destroy_object(struct amdgpu_userq_mgr *uq_mgr,
struct amdgpu_userq_obj *userq_obj)
{
amdgpu_bo_kunmap(userq_obj->obj);
amdgpu_bo_unpin(userq_obj->obj);
amdgpu_bo_unref(&userq_obj->obj);
}