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path: root/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
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Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c')
-rw-r--r--drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c37
1 files changed, 36 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
index 5b3f92891f89..90af8e82b16a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
@@ -57,6 +57,40 @@ void amdgpu_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
ttm_bo_kunmap(&bo->dma_buf_vmap);
}
+int amdgpu_gem_prime_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
+{
+ struct amdgpu_bo *bo = gem_to_amdgpu_bo(obj);
+ struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
+ unsigned asize = amdgpu_bo_size(bo);
+ int ret;
+
+ if (!vma->vm_file)
+ return -ENODEV;
+
+ if (adev == NULL)
+ return -ENODEV;
+
+ /* Check for valid size. */
+ if (asize < vma->vm_end - vma->vm_start)
+ return -EINVAL;
+
+ if (amdgpu_ttm_tt_get_usermm(bo->tbo.ttm) ||
+ (bo->flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS)) {
+ return -EPERM;
+ }
+ vma->vm_pgoff += amdgpu_bo_mmap_offset(bo) >> PAGE_SHIFT;
+
+ /* prime mmap does not need to check access, so allow here */
+ ret = drm_vma_node_allow(&obj->vma_node, vma->vm_file->private_data);
+ if (ret)
+ return ret;
+
+ ret = ttm_bo_mmap(vma->vm_file, vma, &adev->mman.bdev);
+ drm_vma_node_revoke(&obj->vma_node, vma->vm_file->private_data);
+
+ return ret;
+}
+
struct drm_gem_object *
amdgpu_gem_prime_import_sg_table(struct drm_device *dev,
struct dma_buf_attachment *attach,
@@ -136,7 +170,8 @@ struct dma_buf *amdgpu_gem_prime_export(struct drm_device *dev,
{
struct amdgpu_bo *bo = gem_to_amdgpu_bo(gobj);
- if (amdgpu_ttm_tt_get_usermm(bo->tbo.ttm))
+ if (amdgpu_ttm_tt_get_usermm(bo->tbo.ttm) ||
+ bo->flags & AMDGPU_GEM_CREATE_VM_ALWAYS_VALID)
return ERR_PTR(-EPERM);
return drm_gem_prime_export(dev, gobj, flags);