drm/ttm: Remove ttm_bo_mmap() and friends

The function ttm_bo_mmap is unused. Remove it and it's helpers; including
the verify_access callback in struct ttm_device_funcs.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210525151055.8174-8-tzimmermann@suse.de

diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c
index ff07dbc..9bd15cb 100644 (file)
--- a/drivers/gpu/drm/ttm/ttm_bo_vm.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c
@@ -560,30 +560,6 @@ static const struct vm_operations_struct ttm_bo_vm_ops = {
        .access = ttm_bo_vm_access,
 };
 
-static struct ttm_buffer_object *ttm_bo_vm_lookup(struct ttm_device *bdev,
-                                                 unsigned long offset,
-                                                 unsigned long pages)
-{
-       struct drm_vma_offset_node *node;
-       struct ttm_buffer_object *bo = NULL;
-
-       drm_vma_offset_lock_lookup(bdev->vma_manager);
-
-       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);
-
-       if (!bo)
-               pr_err("Could not find buffer object to map\n");
-
-       return bo;
-}
-
 static void ttm_bo_mmap_vma_setup(struct ttm_buffer_object *bo, struct vm_area_struct *vma)
 {
        /*
@@ -611,35 +587,6 @@ static void ttm_bo_mmap_vma_setup(struct ttm_buffer_object *bo, struct vm_area_s
        vma->vm_flags |= VM_IO | VM_DONTEXPAND | VM_DONTDUMP;
 }
 
-int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma,
-               struct ttm_device *bdev)
-{
-       struct ttm_buffer_object *bo;
-       int ret;
-
-       if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET_START))
-               return -EINVAL;
-
-       bo = ttm_bo_vm_lookup(bdev, vma->vm_pgoff, vma_pages(vma));
-       if (unlikely(!bo))
-               return -EINVAL;
-
-       if (unlikely(!bo->bdev->funcs->verify_access)) {
-               ret = -EPERM;
-               goto out_unref;
-       }
-       ret = bo->bdev->funcs->verify_access(bo, filp);
-       if (unlikely(ret != 0))
-               goto out_unref;
-
-       ttm_bo_mmap_vma_setup(bo, vma);
-       return 0;
-out_unref:
-       ttm_bo_put(bo);
-       return ret;
-}
-EXPORT_SYMBOL(ttm_bo_mmap);
-
 int ttm_bo_mmap_obj(struct vm_area_struct *vma, struct ttm_buffer_object *bo)
 {
        ttm_bo_get(bo);

diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h
index 254ede9..f2a5f37 100644 (file)
--- a/include/drm/ttm/ttm_bo_api.h
+++ b/include/drm/ttm/ttm_bo_api.h
@@ -524,19 +524,6 @@ void ttm_bo_vunmap(struct ttm_buffer_object *bo, struct dma_buf_map *map);
  */
 int ttm_bo_mmap_obj(struct vm_area_struct *vma, struct ttm_buffer_object *bo);
 
-/**
- * ttm_bo_mmap - mmap out of the ttm device address space.
- *
- * @filp:      filp as input from the mmap method.
- * @vma:       vma as input from the mmap method.
- * @bdev:      Pointer to the ttm_device with the address space manager.
- *
- * This function is intended to be called by the device mmap method.
- * if the device address space is to be backed by the bo manager.
- */
-int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma,
-               struct ttm_device *bdev);
-
 /**
  * ttm_bo_io
  *

diff --git a/include/drm/ttm/ttm_device.h b/include/drm/ttm/ttm_device.h
index 7c8f87b..cd592f8 100644 (file)
--- a/include/drm/ttm/ttm_device.h
+++ b/include/drm/ttm/ttm_device.h
@@ -161,21 +161,6 @@ struct ttm_device_funcs {
                    struct ttm_resource *new_mem,
                    struct ttm_place *hop);
 
-       /**
-        * struct ttm_bo_driver_member verify_access
-        *
-        * @bo: Pointer to a buffer object.
-        * @filp: Pointer to a struct file trying to access the object.
-        *
-        * Called from the map / write / read methods to verify that the
-        * caller is permitted to access the buffer object.
-        * This member may be set to NULL, which will refuse this kind of
-        * access for all buffer objects.
-        * This function should return 0 if access is granted, -EPERM otherwise.
-        */
-       int (*verify_access)(struct ttm_buffer_object *bo,
-                            struct file *filp);
-
        /**
         * Hook to notify driver about a resource delete.
         */