[PATCH 1/6] drm/ttm: Add unampping of the entire device address space

[Christian König]

Am 09.05.20 um 20:51 schrieb Andrey Grodzovsky:
> Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky at amd.com>
> ---
>   drivers/gpu/drm/ttm/ttm_bo.c    | 22 +++++++++++++++++++++-
>   include/drm/ttm/ttm_bo_driver.h |  2 ++
>   2 files changed, 23 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
> index c5b516f..eae61cc 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo.c
> @@ -1750,9 +1750,29 @@ void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo)
>   	ttm_bo_unmap_virtual_locked(bo);
>   	ttm_mem_io_unlock(man);
>   }
> +EXPORT_SYMBOL(ttm_bo_unmap_virtual);
>   
> +void ttm_bo_unmap_virtual_address_space(struct ttm_bo_device *bdev)
> +{
> +	struct ttm_mem_type_manager *man;
> +	int i;
>   
> -EXPORT_SYMBOL(ttm_bo_unmap_virtual);

> +	for (i = 0; i < TTM_NUM_MEM_TYPES; i++) {
> +		man = &bdev->man[i];
> +		if (man->has_type && man->use_type)
> +			ttm_mem_io_lock(man, false);
> +	}

You should drop that it will just result in a deadlock warning for 
Nouveau and has no effect at all.

Apart from that looks good to me,
Christian.

> +
> +	unmap_mapping_range(bdev->dev_mapping, 0, 0 , 1);
> +	/*TODO What about ttm_mem_io_free_vm(bo) ? */
> +
> +	for (i = TTM_NUM_MEM_TYPES - 1; i >= 0; i--) {
> +		man = &bdev->man[i];
> +		if (man->has_type && man->use_type)
> +			ttm_mem_io_unlock(man);
> +	}
> +}
> +EXPORT_SYMBOL(ttm_bo_unmap_virtual_address_space);
>   
>   int ttm_bo_wait(struct ttm_buffer_object *bo,
>   		bool interruptible, bool no_wait)
> diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
> index c9e0fd0..3133463 100644
> --- a/include/drm/ttm/ttm_bo_driver.h
> +++ b/include/drm/ttm/ttm_bo_driver.h
> @@ -600,6 +600,8 @@ int ttm_bo_device_init(struct ttm_bo_device *bdev,
>    */
>   void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo);
>   
> +void ttm_bo_unmap_virtual_address_space(struct ttm_bo_device *bdev);
> +
>   /**
>    * ttm_bo_unmap_virtual
>    *