[PATCH 5/5] drm: Use the same mmap-range offset and size for GEM and TTM

[Thomas Zimmermann]

GEM defines DRM_FILE_PAGE_OFFSET_{START,SIZE} constants for the
mmap-able range of addresses. TTM can use them as well.

Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
---
 drivers/gpu/drm/drm_gem.c       | 17 -----------------
 drivers/gpu/drm/ttm/ttm_bo.c    |  4 ++--
 drivers/gpu/drm/ttm/ttm_bo_vm.c |  2 +-
 include/drm/drm_vma_manager.h   | 12 ++++++++++++
 include/drm/ttm/ttm_bo_driver.h |  2 --
 5 files changed, 15 insertions(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index d0b9f6a9953f..ea988509ae8f 100644
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -72,23 +72,6 @@
  * up at a later date, and as our interface with shmfs for memory allocation.
  */
 
-/*
- * We make up offsets for buffer objects so we can recognize them at
- * mmap time.
- */
-
-/* pgoff in mmap is an unsigned long, so we need to make sure that
- * the faked up offset will fit
- */
-
-#if BITS_PER_LONG == 64
-#define DRM_FILE_PAGE_OFFSET_START ((0xFFFFFFFFUL >> PAGE_SHIFT) + 1)
-#define DRM_FILE_PAGE_OFFSET_SIZE ((0xFFFFFFFFUL >> PAGE_SHIFT) * 16)
-#else
-#define DRM_FILE_PAGE_OFFSET_START ((0xFFFFFFFUL >> PAGE_SHIFT) + 1)
-#define DRM_FILE_PAGE_OFFSET_SIZE ((0xFFFFFFFUL >> PAGE_SHIFT) * 16)
-#endif
-
 /**
  * drm_gem_init - Initialize the GEM device fields
  * @dev: drm_devic structure to initialize
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index e1b65775f3ee..988416fb8a0b 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -1646,8 +1646,8 @@ int ttm_bo_device_init(struct ttm_bo_device *bdev,
 		goto out_no_sys;
 
 	drm_vma_offset_manager_init(&bdev->vma_manager,
-				    DRM_FILE_PAGE_OFFSET,
-				    0x10000000);
+				    DRM_FILE_PAGE_OFFSET_START,
+				    DRM_FILE_PAGE_OFFSET_SIZE);
 	INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue);
 	INIT_LIST_HEAD(&bdev->ddestroy);
 	bdev->dev_mapping = mapping;
diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c
index e94c2ab3718a..6dacff49c1cc 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_vm.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c
@@ -432,7 +432,7 @@ int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma,
 	struct ttm_buffer_object *bo;
 	int ret;
 
-	if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET))
+	if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET_START))
 		return -EINVAL;
 
 	bo = ttm_bo_vm_lookup(bdev, vma->vm_pgoff, vma_pages(vma));
diff --git a/include/drm/drm_vma_manager.h b/include/drm/drm_vma_manager.h
index c7987daeaed0..f4f8ff1cdeec 100644
--- a/include/drm/drm_vma_manager.h
+++ b/include/drm/drm_vma_manager.h
@@ -29,6 +29,18 @@
 #include <linux/spinlock.h>
 #include <linux/types.h>
 
+/* We make up offsets for buffer objects so we can recognize them at
+ * mmap time. pgoff in mmap is an unsigned long, so we need to make sure
+ * that the faked up offset will fit
+ */
+#if BITS_PER_LONG == 64
+#define DRM_FILE_PAGE_OFFSET_START ((0xFFFFFFFFUL >> PAGE_SHIFT) + 1)
+#define DRM_FILE_PAGE_OFFSET_SIZE ((0xFFFFFFFFUL >> PAGE_SHIFT) * 16)
+#else
+#define DRM_FILE_PAGE_OFFSET_START ((0xFFFFFFFUL >> PAGE_SHIFT) + 1)
+#define DRM_FILE_PAGE_OFFSET_SIZE ((0xFFFFFFFUL >> PAGE_SHIFT) * 16)
+#endif
+
 struct drm_file;
 
 struct drm_vma_offset_file {
diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
index ff0ec43fce7f..61b80ec78e80 100644
--- a/include/drm/ttm/ttm_bo_driver.h
+++ b/include/drm/ttm/ttm_bo_driver.h
@@ -49,8 +49,6 @@
 #define TTM_MEMTYPE_FLAG_MAPPABLE      (1 << 1)	/* Memory mappable */
 #define TTM_MEMTYPE_FLAG_CMA           (1 << 3)	/* Can't map aperture */
 
-#define DRM_FILE_PAGE_OFFSET (0x100000000ULL >> PAGE_SHIFT)
-
 struct ttm_mem_type_manager;
 
 struct ttm_mem_type_manager_func {
-- 
2.20.1