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

[Andrey Grodzovsky <andrey.grodzovsky@xxxxxxx>]

Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@xxxxxxx>
---
 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);
+	}
+
+	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
  *
-- 
2.7.4

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