From: Jérôme Glisse <jgli...@redhat.com>
Allow userspace to create a virtual address range hole for GEM
object.
Signed-off-by: Jérôme Glisse <jgli...@redhat.com>
---
drivers/gpu/drm/nouveau/nouveau_ttm.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/nouveau/nouveau_ttm.c
b/drivers/gpu/drm/nouveau/nouveau_ttm.c
index dff51a0ee028..eafde4c6b7d4 100644
--- a/drivers/gpu/drm/nouveau/nouveau_ttm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_ttm.c
@@ -172,6 +172,13 @@ nouveau_ttm_mmap(struct file *filp, struct vm_area_struct
*vma)
if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
return drm_legacy_mmap(filp, vma);
+ /* Hack for HMM */
+ if (vma->vm_pgoff < (DRM_FILE_PAGE_OFFSET + (4UL << 30))) {
+ struct nouveau_cli *cli = file_priv->driver_priv;
+
+ return nouveau_vmm_hmm(cli, filp, vma);
+ }
+
return ttm_bo_mmap(filp, vma, &drm->ttm.bdev);
}
@@ -305,7 +312,7 @@ nouveau_ttm_init(struct nouveau_drm *drm)
drm->ttm.bo_global_ref.ref.object,
&nouveau_bo_driver,
dev->anon_inode->i_mapping,
- DRM_FILE_PAGE_OFFSET,
+ DRM_FILE_PAGE_OFFSET + (4UL << 30),
drm->client.mmu.dmabits <= 32 ? true : false);
if (ret) {
NV_ERROR(drm, "error initialising bo driver, %d\n", ret);
--
2.14.3
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