[PATCH v5 06/27] drm/amdgpu: Handle IOMMU enabled case.
Andrey Grodzovsky
andrey.grodzovsky at amd.com
Wed May 5 14:51:42 UTC 2021
Ping
Andrey
On 2021-05-04 11:43 a.m., Andrey Grodzovsky wrote:
>
>
> On 2021-05-04 3:03 a.m., Christian König wrote:
>> 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.
>
> What list ? Those BOs don't have ttm_resource_manager and so no
> drm_mm_node list they all bound to. Should I maintain a list for them
> spcifically for the unmap purpuse ?
>
>>
>>> 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?
>
> At first I assumed that because of this change 'iommu: Allow the
> dma-iommu api to use bounce buffers'
> Which changed iommu_dma_unmap_page to call __iommu_dma_unmap_swiotlb
> instead if __iommu_dma_unmap directly. But then i looked inside
> __iommu_dma_unmap_swiotlb and it still calls __iommu_dma_unmap
> evenetually. So maybe the fact that I moved the amd_ip_funcs.hw_fini
> call to inside amdgpu_pci_remove helps.
>
> Andrey
>
>
>>
>> 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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