[PATCH v5 06/27] drm/amdgpu: Handle IOMMU enabled case.
Christian König
ckoenig.leichtzumerken at gmail.com
Tue May 4 07:03:30 UTC 2021
Am 03.05.21 um 22:43 schrieb Andrey Grodzovsky:
>
>
> On 2021-04-29 3:08 a.m., Christian König wrote:
>> Am 28.04.21 um 17:11 schrieb Andrey Grodzovsky:
>>> Handle all DMA IOMMU gropup related dependencies before the
>>> group is removed.
>>>
>>> v5: Drop IOMMU notifier and switch to lockless call to
>>> ttm_tt_unpopulate
>>
>> Maybe split that up into more patches.
>>
>>>
>>> Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky at amd.com>
>>> ---
>>> drivers/gpu/drm/amd/amdgpu/amdgpu.h | 2 ++
>>> drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 31
>>> ++++++++++++++++++++--
>>> drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c | 3 +--
>>> drivers/gpu/drm/amd/amdgpu/amdgpu_gart.h | 1 +
>>> drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c | 9 +++++++
>>> drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 13 ++++++++-
>>> drivers/gpu/drm/amd/amdgpu/amdgpu_object.h | 2 ++
>>> drivers/gpu/drm/amd/amdgpu/cik_ih.c | 1 -
>>> drivers/gpu/drm/amd/amdgpu/cz_ih.c | 1 -
>>> drivers/gpu/drm/amd/amdgpu/iceland_ih.c | 1 -
>>> drivers/gpu/drm/amd/amdgpu/navi10_ih.c | 3 ---
>>> drivers/gpu/drm/amd/amdgpu/si_ih.c | 1 -
>>> drivers/gpu/drm/amd/amdgpu/tonga_ih.c | 1 -
>>> drivers/gpu/drm/amd/amdgpu/vega10_ih.c | 3 ---
>>> 14 files changed, 56 insertions(+), 16 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>> index fddb82897e5d..30a24db5f4d1 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>> @@ -1054,6 +1054,8 @@ struct amdgpu_device {
>>> bool in_pci_err_recovery;
>>> struct pci_saved_state *pci_state;
>>> +
>>> + struct list_head device_bo_list;
>>> };
>>> static inline struct amdgpu_device *drm_to_adev(struct drm_device
>>> *ddev)
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>> index 46d646c40338..91594ddc2459 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>> @@ -70,6 +70,7 @@
>>> #include <drm/task_barrier.h>
>>> #include <linux/pm_runtime.h>
>>> +
>>> MODULE_FIRMWARE("amdgpu/vega10_gpu_info.bin");
>>> MODULE_FIRMWARE("amdgpu/vega12_gpu_info.bin");
>>> MODULE_FIRMWARE("amdgpu/raven_gpu_info.bin");
>>> @@ -3211,7 +3212,6 @@ static const struct attribute
>>> *amdgpu_dev_attributes[] = {
>>> NULL
>>> };
>>> -
>>> /**
>>> * amdgpu_device_init - initialize the driver
>>> *
>>> @@ -3316,6 +3316,8 @@ int amdgpu_device_init(struct amdgpu_device
>>> *adev,
>>> INIT_WORK(&adev->xgmi_reset_work, amdgpu_device_xgmi_reset_func);
>>> + INIT_LIST_HEAD(&adev->device_bo_list);
>>> +
>>> adev->gfx.gfx_off_req_count = 1;
>>> adev->pm.ac_power = power_supply_is_system_supplied() > 0;
>>> @@ -3601,6 +3603,28 @@ int amdgpu_device_init(struct amdgpu_device
>>> *adev,
>>> return r;
>>> }
>>> +static void amdgpu_clear_dma_mappings(struct amdgpu_device *adev)
>>> +{
>>> + struct amdgpu_bo *bo = NULL;
>>> +
>>> + /*
>>> + * Unmaps all DMA mappings before device will be removed from it's
>>> + * IOMMU group otherwise in case of IOMMU enabled system a crash
>>> + * will happen.
>>> + */
>>> +
>>> + spin_lock(&adev->mman.bdev.lru_lock);
>>> + while (!list_empty(&adev->device_bo_list)) {
>>> + bo = list_first_entry(&adev->device_bo_list, struct
>>> amdgpu_bo, bo);
>>> + list_del_init(&bo->bo);
>>> + spin_unlock(&adev->mman.bdev.lru_lock);
>>> + if (bo->tbo.ttm)
>>> + ttm_tt_unpopulate(bo->tbo.bdev, bo->tbo.ttm);
>>> + spin_lock(&adev->mman.bdev.lru_lock);
>>> + }
>>> + spin_unlock(&adev->mman.bdev.lru_lock);
>>
>> Can you try to use the same approach as amdgpu_gtt_mgr_recover()
>> instead of adding something to the BO?
>>
>> Christian.
>
> Are you sure that dma mappings limit themself only to GTT BOs
> which have allocated mm nodes ?
Yes, you would also need the system domain BOs. But those can be put on
a similar list.
> Otherwsie we will crash and burn
> on missing IOMMU group when unampping post device remove.
> Problem for me to test this as in 5.12 kernel I don't crash even
> when removing this entire patch. Looks like iommu_dma_unmap_page
> was changed since 5.9 when I introdiced this patch.
Do we really still need that stuff then? What exactly has changed?
Christian.
>
> Andrey
>
>>
>>> +}
>>> +
>>> /**
>>> * amdgpu_device_fini - tear down the driver
>>> *
>>> @@ -3639,12 +3663,15 @@ void amdgpu_device_fini_hw(struct
>>> amdgpu_device *adev)
>>> amdgpu_ucode_sysfs_fini(adev);
>>> sysfs_remove_files(&adev->dev->kobj, amdgpu_dev_attributes);
>>> -
>>> amdgpu_fbdev_fini(adev);
>>> amdgpu_irq_fini_hw(adev);
>>> amdgpu_device_ip_fini_early(adev);
>>> +
>>> + amdgpu_clear_dma_mappings(adev);
>>> +
>>> + amdgpu_gart_dummy_page_fini(adev);
>>> }
>>> void amdgpu_device_fini_sw(struct amdgpu_device *adev)
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
>>> index fde2d899b2c4..49cdcaf8512d 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.c
>>> @@ -92,7 +92,7 @@ static int amdgpu_gart_dummy_page_init(struct
>>> amdgpu_device *adev)
>>> *
>>> * Frees the dummy page used by the driver (all asics).
>>> */
>>> -static void amdgpu_gart_dummy_page_fini(struct amdgpu_device *adev)
>>> +void amdgpu_gart_dummy_page_fini(struct amdgpu_device *adev)
>>> {
>>> if (!adev->dummy_page_addr)
>>> return;
>>> @@ -397,5 +397,4 @@ void amdgpu_gart_fini(struct amdgpu_device *adev)
>>> vfree(adev->gart.pages);
>>> adev->gart.pages = NULL;
>>> #endif
>>> - amdgpu_gart_dummy_page_fini(adev);
>>> }
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.h
>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.h
>>> index afa2e2877d87..5678d9c105ab 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.h
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gart.h
>>> @@ -61,6 +61,7 @@ int amdgpu_gart_table_vram_pin(struct
>>> amdgpu_device *adev);
>>> void amdgpu_gart_table_vram_unpin(struct amdgpu_device *adev);
>>> int amdgpu_gart_init(struct amdgpu_device *adev);
>>> void amdgpu_gart_fini(struct amdgpu_device *adev);
>>> +void amdgpu_gart_dummy_page_fini(struct amdgpu_device *adev);
>>> int amdgpu_gart_unbind(struct amdgpu_device *adev, uint64_t offset,
>>> int pages);
>>> int amdgpu_gart_map(struct amdgpu_device *adev, uint64_t offset,
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
>>> index 63e815c27585..a922154953a7 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
>>> @@ -326,6 +326,15 @@ void amdgpu_irq_fini_hw(struct amdgpu_device
>>> *adev)
>>> if (!amdgpu_device_has_dc_support(adev))
>>> flush_work(&adev->hotplug_work);
>>> }
>>> +
>>> + if (adev->irq.ih_soft.ring)
>>> + amdgpu_ih_ring_fini(adev, &adev->irq.ih_soft);
>>> + if (adev->irq.ih.ring)
>>> + amdgpu_ih_ring_fini(adev, &adev->irq.ih);
>>> + if (adev->irq.ih1.ring)
>>> + amdgpu_ih_ring_fini(adev, &adev->irq.ih1);
>>> + if (adev->irq.ih2.ring)
>>> + amdgpu_ih_ring_fini(adev, &adev->irq.ih2);
>>> }
>>> /**
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
>>> index 485f249d063a..62d829f5e62c 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
>>> @@ -68,8 +68,13 @@ static void amdgpu_bo_destroy(struct
>>> ttm_buffer_object *tbo)
>>> list_del_init(&bo->shadow_list);
>>> mutex_unlock(&adev->shadow_list_lock);
>>> }
>>> - amdgpu_bo_unref(&bo->parent);
>>> +
>>> + spin_lock(&adev->mman.bdev.lru_lock);
>>> + list_del(&bo->bo);
>>> + spin_unlock(&adev->mman.bdev.lru_lock);
>>> +
>>> + amdgpu_bo_unref(&bo->parent);
>>> kfree(bo->metadata);
>>> kfree(bo);
>>> }
>>> @@ -585,6 +590,12 @@ static int amdgpu_bo_do_create(struct
>>> amdgpu_device *adev,
>>> if (bp->type == ttm_bo_type_device)
>>> bo->flags &= ~AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
>>> + INIT_LIST_HEAD(&bo->bo);
>>> +
>>> + spin_lock(&adev->mman.bdev.lru_lock);
>>> + list_add_tail(&bo->bo, &adev->device_bo_list);
>>> + spin_unlock(&adev->mman.bdev.lru_lock);
>>> +
>>> return 0;
>>> fail_unreserve:
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
>>> index 9ac37569823f..5ae8555ef275 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
>>> @@ -110,6 +110,8 @@ struct amdgpu_bo {
>>> struct list_head shadow_list;
>>> struct kgd_mem *kfd_bo;
>>> +
>>> + struct list_head bo;
>>> };
>>> static inline struct amdgpu_bo *ttm_to_amdgpu_bo(struct
>>> ttm_buffer_object *tbo)
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/cik_ih.c
>>> b/drivers/gpu/drm/amd/amdgpu/cik_ih.c
>>> index 183d44a6583c..df385ffc9768 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/cik_ih.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/cik_ih.c
>>> @@ -310,7 +310,6 @@ static int cik_ih_sw_fini(void *handle)
>>> struct amdgpu_device *adev = (struct amdgpu_device *)handle;
>>> amdgpu_irq_fini_sw(adev);
>>> - amdgpu_ih_ring_fini(adev, &adev->irq.ih);
>>> amdgpu_irq_remove_domain(adev);
>>> return 0;
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/cz_ih.c
>>> b/drivers/gpu/drm/amd/amdgpu/cz_ih.c
>>> index d32743949003..b8c47e0cf37a 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/cz_ih.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/cz_ih.c
>>> @@ -302,7 +302,6 @@ static int cz_ih_sw_fini(void *handle)
>>> struct amdgpu_device *adev = (struct amdgpu_device *)handle;
>>> amdgpu_irq_fini_sw(adev);
>>> - amdgpu_ih_ring_fini(adev, &adev->irq.ih);
>>> amdgpu_irq_remove_domain(adev);
>>> return 0;
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/iceland_ih.c
>>> b/drivers/gpu/drm/amd/amdgpu/iceland_ih.c
>>> index da96c6013477..ddfe4eaeea05 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/iceland_ih.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/iceland_ih.c
>>> @@ -301,7 +301,6 @@ static int iceland_ih_sw_fini(void *handle)
>>> struct amdgpu_device *adev = (struct amdgpu_device *)handle;
>>> amdgpu_irq_fini_sw(adev);
>>> - amdgpu_ih_ring_fini(adev, &adev->irq.ih);
>>> amdgpu_irq_remove_domain(adev);
>>> return 0;
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/navi10_ih.c
>>> b/drivers/gpu/drm/amd/amdgpu/navi10_ih.c
>>> index 5eea4550b856..e171a9e78544 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/navi10_ih.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/navi10_ih.c
>>> @@ -571,9 +571,6 @@ static int navi10_ih_sw_fini(void *handle)
>>> amdgpu_irq_fini_sw(adev);
>>> amdgpu_ih_ring_fini(adev, &adev->irq.ih_soft);
>>> - amdgpu_ih_ring_fini(adev, &adev->irq.ih2);
>>> - amdgpu_ih_ring_fini(adev, &adev->irq.ih1);
>>> - amdgpu_ih_ring_fini(adev, &adev->irq.ih);
>>> return 0;
>>> }
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/si_ih.c
>>> b/drivers/gpu/drm/amd/amdgpu/si_ih.c
>>> index 751307f3252c..9a24f17a5750 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/si_ih.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/si_ih.c
>>> @@ -176,7 +176,6 @@ static int si_ih_sw_fini(void *handle)
>>> struct amdgpu_device *adev = (struct amdgpu_device *)handle;
>>> amdgpu_irq_fini_sw(adev);
>>> - amdgpu_ih_ring_fini(adev, &adev->irq.ih);
>>> return 0;
>>> }
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/tonga_ih.c
>>> b/drivers/gpu/drm/amd/amdgpu/tonga_ih.c
>>> index 973d80ec7f6c..b08905d1c00f 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/tonga_ih.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/tonga_ih.c
>>> @@ -313,7 +313,6 @@ static int tonga_ih_sw_fini(void *handle)
>>> struct amdgpu_device *adev = (struct amdgpu_device *)handle;
>>> amdgpu_irq_fini_sw(adev);
>>> - amdgpu_ih_ring_fini(adev, &adev->irq.ih);
>>> amdgpu_irq_remove_domain(adev);
>>> return 0;
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/vega10_ih.c
>>> b/drivers/gpu/drm/amd/amdgpu/vega10_ih.c
>>> index 2d0094c276ca..8c8abc00f710 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/vega10_ih.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/vega10_ih.c
>>> @@ -525,9 +525,6 @@ static int vega10_ih_sw_fini(void *handle)
>>> amdgpu_irq_fini_sw(adev);
>>> amdgpu_ih_ring_fini(adev, &adev->irq.ih_soft);
>>> - amdgpu_ih_ring_fini(adev, &adev->irq.ih2);
>>> - amdgpu_ih_ring_fini(adev, &adev->irq.ih1);
>>> - amdgpu_ih_ring_fini(adev, &adev->irq.ih);
>>> return 0;
>>> }
>>
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