Re: [PATCH 1/8] drm/ttm: turn ttm_bo_device.vma_manager into a pointer

[Christian KÃnig]

Am 05.09.19 um 09:05 schrieb Gerd Hoffmann:
> Rename the embedded struct vma_offset_manager, new name is _vma_manager.
> ttm_bo_device.vma_manager changed to a pointer.
>
> The ttm_bo_device_init() function gets an additional vma_manager
> argument which allows to initialize ttm with a different vma manager.
> When passing NULL the embedded _vma_manager is used.
>
> All callers are updated to pass NULL, so the behavior doesn't change.
>
> Signed-off-by: Gerd Hoffmann <kraxel@xxxxxxxxxx>

Reviewed-by: Christian KÃnig <christian.koenig@xxxxxxx>

> ---
>   include/drm/ttm/ttm_bo_driver.h         |  8 ++++++--
>   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c |  1 +
>   drivers/gpu/drm/drm_vram_mm_helper.c    |  1 +
>   drivers/gpu/drm/nouveau/nouveau_ttm.c   |  1 +
>   drivers/gpu/drm/qxl/qxl_ttm.c           |  1 +
>   drivers/gpu/drm/radeon/radeon_ttm.c     |  1 +
>   drivers/gpu/drm/ttm/ttm_bo.c            | 13 +++++++++----
>   drivers/gpu/drm/ttm/ttm_bo_vm.c         |  6 +++---
>   drivers/gpu/drm/vmwgfx/vmwgfx_drv.c     |  1 +
>   9 files changed, 24 insertions(+), 9 deletions(-)
>
> diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
> index e88e00c6cbf2..e365434f92b3 100644
> --- a/include/drm/ttm/ttm_bo_driver.h
> +++ b/include/drm/ttm/ttm_bo_driver.h
> @@ -441,7 +441,8 @@ extern struct ttm_bo_global {
>    *
>    * @driver: Pointer to a struct ttm_bo_driver struct setup by the driver.
>    * @man: An array of mem_type_managers.
> - * @vma_manager: Address space manager
> + * @vma_manager: Address space manager (pointer)
> + * @_vma_manager: Address space manager (enbedded)
>    * lru_lock: Spinlock that protects the buffer+device lru lists and
>    * ddestroy lists.
>    * @dev_mapping: A pointer to the struct address_space representing the
> @@ -464,7 +465,8 @@ struct ttm_bo_device {
>   	/*
>   	 * Protected by internal locks.
>   	 */
> -	struct drm_vma_offset_manager vma_manager;
> +	struct drm_vma_offset_manager *vma_manager;
> +	struct drm_vma_offset_manager _vma_manager;
>   
>   	/*
>   	 * Protected by the global:lru lock.
> @@ -585,6 +587,7 @@ int ttm_bo_device_release(struct ttm_bo_device *bdev);
>    * @glob: A pointer to an initialized struct ttm_bo_global.
>    * @driver: A pointer to a struct ttm_bo_driver set up by the caller.
>    * @mapping: The address space to use for this bo.
> + * @vma_manager: A pointer to a vma manager or NULL.
>    * @file_page_offset: Offset into the device address space that is available
>    * for buffer data. This ensures compatibility with other users of the
>    * address space.
> @@ -596,6 +599,7 @@ int ttm_bo_device_release(struct ttm_bo_device *bdev);
>   int ttm_bo_device_init(struct ttm_bo_device *bdev,
>   		       struct ttm_bo_driver *driver,
>   		       struct address_space *mapping,
> +		       struct drm_vma_offset_manager *vma_manager,
>   		       bool need_dma32);
>   
>   /**
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> index fb09314bcfd4..34ee5d725faf 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> @@ -1728,6 +1728,7 @@ int amdgpu_ttm_init(struct amdgpu_device *adev)
>   	r = ttm_bo_device_init(&adev->mman.bdev,
>   			       &amdgpu_bo_driver,
>   			       adev->ddev->anon_inode->i_mapping,
> +			       NULL,
>   			       adev->need_dma32);
>   	if (r) {
>   		DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
> diff --git a/drivers/gpu/drm/drm_vram_mm_helper.c b/drivers/gpu/drm/drm_vram_mm_helper.c
> index c911781d6728..56fd1519eb35 100644
> --- a/drivers/gpu/drm/drm_vram_mm_helper.c
> +++ b/drivers/gpu/drm/drm_vram_mm_helper.c
> @@ -172,6 +172,7 @@ int drm_vram_mm_init(struct drm_vram_mm *vmm, struct drm_device *dev,
>   
>   	ret = ttm_bo_device_init(&vmm->bdev, &bo_driver,
>   				 dev->anon_inode->i_mapping,
> +				 NULL,
>   				 true);
>   	if (ret)
>   		return ret;
> diff --git a/drivers/gpu/drm/nouveau/nouveau_ttm.c b/drivers/gpu/drm/nouveau/nouveau_ttm.c
> index f0daf958e03a..e67eb10843d1 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_ttm.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_ttm.c
> @@ -236,6 +236,7 @@ nouveau_ttm_init(struct nouveau_drm *drm)
>   	ret = ttm_bo_device_init(&drm->ttm.bdev,
>   				  &nouveau_bo_driver,
>   				  dev->anon_inode->i_mapping,
> +				 NULL,
>   				  drm->client.mmu.dmabits <= 32 ? true : false);
>   	if (ret) {
>   		NV_ERROR(drm, "error initialising bo driver, %d\n", ret);
> diff --git a/drivers/gpu/drm/qxl/qxl_ttm.c b/drivers/gpu/drm/qxl/qxl_ttm.c
> index 9b24514c75aa..69da0eea6e4c 100644
> --- a/drivers/gpu/drm/qxl/qxl_ttm.c
> +++ b/drivers/gpu/drm/qxl/qxl_ttm.c
> @@ -325,6 +325,7 @@ int qxl_ttm_init(struct qxl_device *qdev)
>   	r = ttm_bo_device_init(&qdev->mman.bdev,
>   			       &qxl_bo_driver,
>   			       qdev->ddev.anon_inode->i_mapping,
> +			       NULL,
>   			       false);
>   	if (r) {
>   		DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
> diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
> index 35ac75a11d38..e2c12e59704d 100644
> --- a/drivers/gpu/drm/radeon/radeon_ttm.c
> +++ b/drivers/gpu/drm/radeon/radeon_ttm.c
> @@ -794,6 +794,7 @@ int radeon_ttm_init(struct radeon_device *rdev)
>   	r = ttm_bo_device_init(&rdev->mman.bdev,
>   			       &radeon_bo_driver,
>   			       rdev->ddev->anon_inode->i_mapping,
> +			       NULL,
>   			       rdev->need_dma32);
>   	if (r) {
>   		DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
> diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
> index 58d1f2b28132..8dc26babc5cb 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo.c
> @@ -672,7 +672,7 @@ static void ttm_bo_release(struct kref *kref)
>   	struct ttm_bo_device *bdev = bo->bdev;
>   	struct ttm_mem_type_manager *man = &bdev->man[bo->mem.mem_type];
>   
> -	drm_vma_offset_remove(&bdev->vma_manager, &bo->base.vma_node);
> +	drm_vma_offset_remove(bdev->vma_manager, &bo->base.vma_node);
>   	ttm_mem_io_lock(man, false);
>   	ttm_mem_io_free_vm(bo);
>   	ttm_mem_io_unlock(man);
> @@ -1353,7 +1353,7 @@ int ttm_bo_init_reserved(struct ttm_bo_device *bdev,
>   	 */
>   	if (bo->type == ttm_bo_type_device ||
>   	    bo->type == ttm_bo_type_sg)
> -		ret = drm_vma_offset_add(&bdev->vma_manager, &bo->base.vma_node,
> +		ret = drm_vma_offset_add(bdev->vma_manager, &bo->base.vma_node,
>   					 bo->mem.num_pages);
>   
>   	/* passed reservation objects should already be locked,
> @@ -1704,7 +1704,7 @@ int ttm_bo_device_release(struct ttm_bo_device *bdev)
>   			pr_debug("Swap list %d was clean\n", i);
>   	spin_unlock(&glob->lru_lock);
>   
> -	drm_vma_offset_manager_destroy(&bdev->vma_manager);
> +	drm_vma_offset_manager_destroy(&bdev->_vma_manager);
>   
>   	if (!ret)
>   		ttm_bo_global_release();
> @@ -1716,11 +1716,15 @@ EXPORT_SYMBOL(ttm_bo_device_release);
>   int ttm_bo_device_init(struct ttm_bo_device *bdev,
>   		       struct ttm_bo_driver *driver,
>   		       struct address_space *mapping,
> +		       struct drm_vma_offset_manager *vma_manager,
>   		       bool need_dma32)
>   {
>   	struct ttm_bo_global *glob = &ttm_bo_glob;
>   	int ret;
>   
> +	if (!vma_manager)
> +		vma_manager = &bdev->_vma_manager;
> +
>   	ret = ttm_bo_global_init();
>   	if (ret)
>   		return ret;
> @@ -1737,7 +1741,8 @@ int ttm_bo_device_init(struct ttm_bo_device *bdev,
>   	if (unlikely(ret != 0))
>   		goto out_no_sys;
>   
> -	drm_vma_offset_manager_init(&bdev->vma_manager,
> +	bdev->vma_manager = vma_manager;
> +	drm_vma_offset_manager_init(&bdev->_vma_manager,
>   				    DRM_FILE_PAGE_OFFSET_START,
>   				    DRM_FILE_PAGE_OFFSET_SIZE);
>   	INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue);
> diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c
> index 76eedb963693..4aa007edffb0 100644
> --- a/drivers/gpu/drm/ttm/ttm_bo_vm.c
> +++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c
> @@ -409,16 +409,16 @@ static struct ttm_buffer_object *ttm_bo_vm_lookup(struct ttm_bo_device *bdev,
>   	struct drm_vma_offset_node *node;
>   	struct ttm_buffer_object *bo = NULL;
>   
> -	drm_vma_offset_lock_lookup(&bdev->vma_manager);
> +	drm_vma_offset_lock_lookup(bdev->vma_manager);
>   
> -	node = drm_vma_offset_lookup_locked(&bdev->vma_manager, offset, pages);
> +	node = drm_vma_offset_lookup_locked(bdev->vma_manager, offset, pages);
>   	if (likely(node)) {
>   		bo = container_of(node, struct ttm_buffer_object,
>   				  base.vma_node);
>   		bo = ttm_bo_get_unless_zero(bo);
>   	}
>   
> -	drm_vma_offset_unlock_lookup(&bdev->vma_manager);
> +	drm_vma_offset_unlock_lookup(bdev->vma_manager);
>   
>   	if (!bo)
>   		pr_err("Could not find buffer object to map\n");
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> index cd0d49d8a8da..20bc91214e75 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
> @@ -830,6 +830,7 @@ static int vmw_driver_load(struct drm_device *dev, unsigned long chipset)
>   	ret = ttm_bo_device_init(&dev_priv->bdev,
>   				 &vmw_bo_driver,
>   				 dev->anon_inode->i_mapping,
> +				 NULL,
>   				 false);
>   	if (unlikely(ret != 0)) {
>   		DRM_ERROR("Failed initializing TTM buffer object driver.\n");