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Mon, 16 Mar 2026 11:28:56 +0800 (CST) X-Sender: johnny_haocn@sina.com X-Auth-ID: johnny_haocn@sina.com Authentication-Results: sina.com; spf=none smtp.mailfrom=johnny_haocn@sina.com; dkim=none header.i=none; dmarc=none action=none header.from=johnny_haocn@sina.com X-SMAIL-MID: 9515797602529 X-SMAIL-UIID: 42F187FB0F524273B6D19C5D4AEF4D68-20260316-112856-1 From: Johnny Hao To: gregkh@linuxfoundation.org, stable@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Lang Yu , =?UTF-8?q?Christian=20K=C3=B6nig?= , Alex Deucher , Johnny Hao Subject: [PATCH 5.15.y] drm/amdgpu: unmap and remove csa_va properly Date: Mon, 16 Mar 2026 11:28:51 +0800 Message-Id: <20260316032851.3319377-1-johnny_haocn@sina.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable From: Lang Yu [ Upstream commit 5daff15cd013422bc6d1efcfe82b586800025384 ] Root PD BO should be reserved before unmap and remove a bo_va from VM otherwise lockdep will complain. v2: check fpriv->csa_va is not NULL instead of amdgpu_mcbp (christian) [14616.936827] WARNING: CPU: 6 PID: 1711 at drivers/gpu/drm/amd/amdgpu/amdg= pu_vm.c:1762 amdgpu_vm_bo_del+0x399/0x3f0 [amdgpu] [14616.937096] Call Trace: [14616.937097] [14616.937102] amdgpu_driver_postclose_kms+0x249/0x2f0 [amdgpu] [14616.937187] drm_file_free+0x1d6/0x300 [drm] [14616.937207] drm_close_helper.isra.0+0x62/0x70 [drm] [14616.937220] drm_release+0x5e/0x100 [drm] [14616.937234] __fput+0x9f/0x280 [14616.937239] ____fput+0xe/0x20 [14616.937241] task_work_run+0x61/0x90 [14616.937246] exit_to_user_mode_prepare+0x215/0x220 [14616.937251] syscall_exit_to_user_mode+0x2a/0x60 [14616.937254] do_syscall_64+0x48/0x90 [14616.937257] entry_SYSCALL_64_after_hwframe+0x63/0xcd Signed-off-by: Lang Yu Acked-by: Christian K=C3=B6nig Signed-off-by: Alex Deucher [ The context change is due to the commit e56694f718f0 ("drm/amdgpu: rename amdgpu_vm_bo_rmv to _del") in v5.18 and the proper adoption is done which is irrelevant to the logic of this patch. ] Signed-off-by: Johnny Hao --- drivers/gpu/drm/amd/amdgpu/amdgpu_csa.c | 38 +++++++++++++++++++++++++ drivers/gpu/drm/amd/amdgpu/amdgpu_csa.h | 3 ++ drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 10 +++---- 3 files changed, 45 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_csa.c b/drivers/gpu/drm/amd/= amdgpu/amdgpu_csa.c index da21e60bb827..b0016d634e1d 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_csa.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_csa.c @@ -106,3 +106,41 @@ int amdgpu_map_static_csa(struct amdgpu_device *adev, = struct amdgpu_vm *vm, ttm_eu_backoff_reservation(&ticket, &list); return 0; } + +int amdgpu_unmap_static_csa(struct amdgpu_device *adev, struct amdgpu_vm *= vm, + struct amdgpu_bo *bo, struct amdgpu_bo_va *bo_va, + uint64_t csa_addr) +{ + struct ww_acquire_ctx ticket; + struct list_head list; + struct amdgpu_bo_list_entry pd; + struct ttm_validate_buffer csa_tv; + int r; + + INIT_LIST_HEAD(&list); + INIT_LIST_HEAD(&csa_tv.head); + csa_tv.bo =3D &bo->tbo; + csa_tv.num_shared =3D 1; + + list_add(&csa_tv.head, &list); + amdgpu_vm_get_pd_bo(vm, &list, &pd); + + r =3D ttm_eu_reserve_buffers(&ticket, &list, true, NULL); + if (r) { + DRM_ERROR("failed to reserve CSA,PD BOs: err=3D%d\n", r); + return r; + } + + r =3D amdgpu_vm_bo_unmap(adev, bo_va, csa_addr); + if (r) { + DRM_ERROR("failed to do bo_unmap on static CSA, err=3D%d\n", r); + ttm_eu_backoff_reservation(&ticket, &list); + return r; + } + + amdgpu_vm_bo_rmv(adev, bo_va); + + ttm_eu_backoff_reservation(&ticket, &list); + + return 0; +} diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_csa.h b/drivers/gpu/drm/amd/= amdgpu/amdgpu_csa.h index 524b4437a021..7dfc1f2012eb 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_csa.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_csa.h @@ -34,6 +34,9 @@ int amdgpu_allocate_static_csa(struct amdgpu_device *adev= , struct amdgpu_bo **bo int amdgpu_map_static_csa(struct amdgpu_device *adev, struct amdgpu_vm *vm, struct amdgpu_bo *bo, struct amdgpu_bo_va **bo_va, uint64_t csa_addr, uint32_t size); +int amdgpu_unmap_static_csa(struct amdgpu_device *adev, struct amdgpu_vm *= vm, + struct amdgpu_bo *bo, struct amdgpu_bo_va *bo_va, + uint64_t csa_addr); void amdgpu_free_static_csa(struct amdgpu_bo **bo); =20 #endif diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/= amdgpu/amdgpu_kms.c index 70d49b998ee9..b8b0b819de72 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c @@ -1273,14 +1273,12 @@ void amdgpu_driver_postclose_kms(struct drm_device = *dev, if (amdgpu_device_ip_get_ip_block(adev, AMD_IP_BLOCK_TYPE_VCE) !=3D NULL) amdgpu_vce_free_handles(adev, file_priv); =20 - amdgpu_vm_bo_rmv(adev, fpriv->prt_va); + if (fpriv->csa_va) { + uint64_t csa_addr =3D amdgpu_csa_vaddr(adev) & AMDGPU_GMC_HOLE_MASK; =20 - if (amdgpu_mcbp || amdgpu_sriov_vf(adev)) { - /* TODO: how to handle reserve failure */ - BUG_ON(amdgpu_bo_reserve(adev->virt.csa_obj, true)); - amdgpu_vm_bo_rmv(adev, fpriv->csa_va); + WARN_ON(amdgpu_unmap_static_csa(adev, &fpriv->vm, adev->virt.csa_obj, + fpriv->csa_va, csa_addr)); fpriv->csa_va =3D NULL; - amdgpu_bo_unreserve(adev->virt.csa_obj); } =20 pasid =3D fpriv->vm.pasid; --=20 2.34.1