[PATCH v3 1/4] drm/ttm: Create pinned list
Andrey Grodzovsky
andrey.grodzovsky at amd.com
Mon Aug 30 17:02:44 UTC 2021
On 2021-08-30 12:51 p.m., Christian König wrote:
> Am 30.08.21 um 16:16 schrieb Andrey Grodzovsky:
>>
>> On 2021-08-30 4:58 a.m., Christian König wrote:
>>> Am 27.08.21 um 22:39 schrieb Andrey Grodzovsky:
>>>> This list will be used to capture all non VRAM BOs not
>>>> on LRU so when device is hot unplugged we can iterate
>>>> the list and unmap DMA mappings before device is removed.
>>>>
>>>> v2: Reanme function to ttm_bo_move_to_pinned
>>>> v3: Move the pinned list to ttm device
>>>
>>> As far as I can see there is not list_del() remaining. So this won't
>>> work correctly.
>>
>>
>> It's in ttm_bo_release, there was no code change there hence it's not
>> captured in the patch.
>
> Ah! So you keep the logic as is there. Sorry totally missed that.
>
> In this case the patch is Reviewed-by: Christian König
> <christian.koenig at amd.com>
>
> Can you push this to drm-misc-next?
>
> Thanks,
> Christian.
I think It's supposed to go on top of your changes you mention here
which are not pushed yet.
I will need to apply all the patches on top of yours and retest (I was
doing everything in amd-staging-drm-next)
until now.
Andrey
>
>>
>> Andrey
>>
>>
>>>
>>> I suggest to rather rebase on top of the stuff I'm working on for a
>>> while to move the LRU into the resource instead.
>>>
>>> Just send out the latest patch set of this with you in CC.
>>>
>>> Christian.
>>>
>>>>
>>>> Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky at amd.com>
>>>> Suggested-by: Christian König <christian.koenig at amd.com>
>>>> ---
>>>> drivers/gpu/drm/ttm/ttm_bo.c | 18 ++++++++++++++----
>>>> drivers/gpu/drm/ttm/ttm_device.c | 1 +
>>>> include/drm/ttm/ttm_device.h | 1 +
>>>> 3 files changed, 16 insertions(+), 4 deletions(-)
>>>>
>>>> diff --git a/drivers/gpu/drm/ttm/ttm_bo.c
>>>> b/drivers/gpu/drm/ttm/ttm_bo.c
>>>> index 1b950b45cf4b..1fedd0eb67ba 100644
>>>> --- a/drivers/gpu/drm/ttm/ttm_bo.c
>>>> +++ b/drivers/gpu/drm/ttm/ttm_bo.c
>>>> @@ -69,7 +69,17 @@ static void ttm_bo_mem_space_debug(struct
>>>> ttm_buffer_object *bo,
>>>> }
>>>> }
>>>> -static void ttm_bo_del_from_lru(struct ttm_buffer_object *bo)
>>>> +static inline void ttm_bo_move_to_pinned(struct ttm_buffer_object
>>>> *bo)
>>>> +{
>>>> + struct ttm_device *bdev = bo->bdev;
>>>> +
>>>> + list_move_tail(&bo->lru, &bdev->pinned);
>>>> +
>>>> + if (bdev->funcs->del_from_lru_notify)
>>>> + bdev->funcs->del_from_lru_notify(bo);
>>>> +}
>>>> +
>>>> +static inline void ttm_bo_del_from_lru(struct ttm_buffer_object *bo)
>>>> {
>>>> struct ttm_device *bdev = bo->bdev;
>>>> @@ -98,7 +108,7 @@ void ttm_bo_move_to_lru_tail(struct
>>>> ttm_buffer_object *bo,
>>>> dma_resv_assert_held(bo->base.resv);
>>>> if (bo->pin_count) {
>>>> - ttm_bo_del_from_lru(bo);
>>>> + ttm_bo_move_to_pinned(bo);
>>>> return;
>>>> }
>>>> @@ -339,7 +349,7 @@ static int ttm_bo_cleanup_refs(struct
>>>> ttm_buffer_object *bo,
>>>> return ret;
>>>> }
>>>> - ttm_bo_del_from_lru(bo);
>>>> + ttm_bo_move_to_pinned(bo);
>>>> list_del_init(&bo->ddestroy);
>>>> spin_unlock(&bo->bdev->lru_lock);
>>>> ttm_bo_cleanup_memtype_use(bo);
>>>> @@ -1154,7 +1164,7 @@ int ttm_bo_swapout(struct ttm_buffer_object
>>>> *bo, struct ttm_operation_ctx *ctx,
>>>> return 0;
>>>> }
>>>> - ttm_bo_del_from_lru(bo);
>>>> + ttm_bo_move_to_pinned(bo);
>>>> /* TODO: Cleanup the locking */
>>>> spin_unlock(&bo->bdev->lru_lock);
>>>> diff --git a/drivers/gpu/drm/ttm/ttm_device.c
>>>> b/drivers/gpu/drm/ttm/ttm_device.c
>>>> index 5f31acec3ad7..530a9c36be37 100644
>>>> --- a/drivers/gpu/drm/ttm/ttm_device.c
>>>> +++ b/drivers/gpu/drm/ttm/ttm_device.c
>>>> @@ -208,6 +208,7 @@ int ttm_device_init(struct ttm_device *bdev,
>>>> struct ttm_device_funcs *funcs,
>>>> INIT_DELAYED_WORK(&bdev->wq, ttm_device_delayed_workqueue);
>>>> spin_lock_init(&bdev->lru_lock);
>>>> INIT_LIST_HEAD(&bdev->ddestroy);
>>>> + INIT_LIST_HEAD(&bdev->pinned);
>>>> bdev->dev_mapping = mapping;
>>>> mutex_lock(&ttm_global_mutex);
>>>> list_add_tail(&bdev->device_list, &glob->device_list);
>>>> diff --git a/include/drm/ttm/ttm_device.h
>>>> b/include/drm/ttm/ttm_device.h
>>>> index cd592f8e941b..03fb44d061e0 100644
>>>> --- a/include/drm/ttm/ttm_device.h
>>>> +++ b/include/drm/ttm/ttm_device.h
>>>> @@ -265,6 +265,7 @@ struct ttm_device {
>>>> */
>>>> spinlock_t lru_lock;
>>>> struct list_head ddestroy;
>>>> + struct list_head pinned;
>>>> /*
>>>> * Protected by load / firstopen / lastclose /unload sync.
>>>
>
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