[PATCH v4 1/9] drm/xe: Add xe_bo_vm_access

[Matthew Brost <matthew.brost@intel.com>]

Add xe_bo_vm_access which is wrapper around ttm_bo_vm_access which takes
rpm refs for device access.

Suggested-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
---
 drivers/gpu/drm/xe/xe_bo.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/xe_bo.c b/drivers/gpu/drm/xe/xe_bo.c
index 5b232f2951b1..0261a8b29351 100644
--- a/drivers/gpu/drm/xe/xe_bo.c
+++ b/drivers/gpu/drm/xe/xe_bo.c
@@ -1236,11 +1236,26 @@ static vm_fault_t xe_gem_fault(struct vm_fault *vmf)
 	return ret;
 }
 
+static int xe_bo_vm_access(struct vm_area_struct *vma, unsigned long addr,
+			   void *buf, int len, int write)
+{
+	struct ttm_buffer_object *ttm_bo = vma->vm_private_data;
+	struct xe_bo *bo = ttm_to_xe_bo(ttm_bo);
+	struct xe_device *xe = xe_bo_device(bo);
+	int ret;
+
+	xe_pm_runtime_get(xe);
+	ret = ttm_bo_vm_access(vma, addr, buf, len, write);
+	xe_pm_runtime_put(xe);
+
+	return ret;
+}
+
 static const struct vm_operations_struct xe_gem_vm_ops = {
 	.fault = xe_gem_fault,
 	.open = ttm_bo_vm_open,
 	.close = ttm_bo_vm_close,
-	.access = ttm_bo_vm_access
+	.access = xe_bo_vm_access,
 };
 
 static const struct drm_gem_object_funcs xe_gem_object_funcs = {
-- 
2.34.1