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Message-Id: <20190919100223.13309-9-kraxel@redhat.com>
Date: Thu, 19 Sep 2019 12:02:20 +0200
From: Gerd Hoffmann <kraxel@...hat.com>
To: dri-devel@...ts.freedesktop.org
Cc: Thomas Zimmermann <tzimmermann@...e.de>,
Daniel Vetter <daniel.vetter@...ll.ch>,
Gerd Hoffmann <kraxel@...hat.com>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <maxime.ripard@...tlin.com>,
Sean Paul <sean@...rly.run>, David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v3 08/11] drm/ttm: add drm_gem_ttm_mmap()
Add helper function to mmap ttm bo's using &drm_gem_object_funcs.mmap().
Note that with this code path access verification is done by
drm_gem_mmap() (which calls drm_vma_node_is_allowed(()).
The &ttm_bo_driver.verify_access() callback is is not used.
Signed-off-by: Gerd Hoffmann <kraxel@...hat.com>
---
include/drm/drm_gem_ttm_helper.h | 2 ++
drivers/gpu/drm/drm_gem_ttm_helper.c | 17 +++++++++++++++++
2 files changed, 19 insertions(+)
diff --git a/include/drm/drm_gem_ttm_helper.h b/include/drm/drm_gem_ttm_helper.h
index 6268f89c5a48..118cef76f84f 100644
--- a/include/drm/drm_gem_ttm_helper.h
+++ b/include/drm/drm_gem_ttm_helper.h
@@ -15,5 +15,7 @@
void drm_gem_ttm_print_info(struct drm_printer *p, unsigned int indent,
const struct drm_gem_object *gem);
+int drm_gem_ttm_mmap(struct drm_gem_object *gem,
+ struct vm_area_struct *vma);
#endif
diff --git a/drivers/gpu/drm/drm_gem_ttm_helper.c b/drivers/gpu/drm/drm_gem_ttm_helper.c
index 9a4bafcf20df..990cd286d1bc 100644
--- a/drivers/gpu/drm/drm_gem_ttm_helper.c
+++ b/drivers/gpu/drm/drm_gem_ttm_helper.c
@@ -52,5 +52,22 @@ void drm_gem_ttm_print_info(struct drm_printer *p, unsigned int indent,
}
EXPORT_SYMBOL(drm_gem_ttm_print_info);
+/**
+ * drm_gem_ttm_mmap() - mmap &ttm_buffer_object
+ * @gem: GEM object.
+ * @vma: vm area.
+ *
+ * This function can be used as &drm_gem_object_funcs.mmap
+ * callback.
+ */
+int drm_gem_ttm_mmap(struct drm_gem_object *gem,
+ struct vm_area_struct *vma)
+{
+ struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem);
+
+ return ttm_bo_mmap_obj(vma, bo);
+}
+EXPORT_SYMBOL(drm_gem_ttm_mmap);
+
MODULE_DESCRIPTION("DRM gem ttm helpers");
MODULE_LICENSE("GPL");
--
2.18.1
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