1 files changed, 39 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index ffaa703e89f5..fcf83178b113 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -516,6 +516,29 @@ int amdgpu_wb_get(struct amdgpu_device *adev, u32 *wb)
 }
 
 /**
+ * amdgpu_wb_get_64bit - Allocate a wb entry
+ *
+ * @adev: amdgpu_device pointer
+ * @wb: wb index
+ *
+ * Allocate a wb slot for use by the driver (all asics).
+ * Returns 0 on success or -EINVAL on failure.
+ */
+int amdgpu_wb_get_64bit(struct amdgpu_device *adev, u32 *wb)
+{
+        unsigned long offset = bitmap_find_next_zero_area_off(adev->wb.used,
+                                adev->wb.num_wb, 0, 2, 7, 0);
+        if ((offset + 1) < adev->wb.num_wb) {
+                __set_bit(offset, adev->wb.used);
+                __set_bit(offset + 1, adev->wb.used);
+                *wb = offset;
+                return 0;
+        } else {
+                return -EINVAL;
+        }
+}
+
+/**
  * amdgpu_wb_free - Free a wb entry
  *
  * @adev: amdgpu_device pointer
@@ -530,6 +553,22 @@ void amdgpu_wb_free(struct amdgpu_device *adev, u32 wb)
 }
 
 /**
+ * amdgpu_wb_free_64bit - Free a wb entry
+ *
+ * @adev: amdgpu_device pointer
+ * @wb: wb index
+ *
+ * Free a wb slot allocated for use by the driver (all asics)
+ */
+void amdgpu_wb_free_64bit(struct amdgpu_device *adev, u32 wb)
+{
+        if ((wb + 1) < adev->wb.num_wb) {
+                __clear_bit(wb, adev->wb.used);
+                __clear_bit(wb + 1, adev->wb.used);
+        }
+}
+
+/**
  * amdgpu_vram_location - try to find VRAM location
  * @adev: amdgpu device structure holding all necessary informations
  * @mc: memory controller structure holding memory informations