[PATCH 1/3] drm/amdgpu: introduce struct amdgpu_bo_user

[Nirmoy Das]

Implement a new struct amdgpu_bo_user as subclass of
struct amdgpu_bo and a function to created amdgpu_bo_user
bo with a flag to identify the owner.

Signed-off-by: Nirmoy Das <nirmoy.das at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 44 ++++++++++++++++++++++
 drivers/gpu/drm/amd/amdgpu/amdgpu_object.h |  9 +++++
 include/uapi/drm/amdgpu_drm.h              |  2 +
 3 files changed, 55 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 745393472564..f21679f38383 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -699,6 +699,50 @@ int amdgpu_bo_create(struct amdgpu_device *adev,
 	return r;
 }
 
+/**
+ * amdgpu_bo_create_user - create an &amdgpu_bo_user buffer object
+ * @adev: amdgpu device object
+ * @bp: parameters to be used for the buffer object
+ * @ubo_ptr: pointer to the buffer object pointer
+ *
+ * Create a BO to be used by user application;
+ *
+ * Returns:
+ * 0 for success or a negative error code on failure.
+ */
+
+int amdgpu_bo_create_user(struct amdgpu_device *adev,
+		     struct amdgpu_bo_param *bp,
+		     struct amdgpu_bo_user **ubo_ptr)
+{
+	struct amdgpu_bo *bo_ptr;
+	u64 flags = bp->flags;
+	int r;
+
+	bp->flags = bp->flags & ~AMDGPU_GEM_CREATE_SHADOW;
+	bp->flags = bp->flags | AMDGPU_GEM_CREATE_USER;
+	bp->bo_ptr_size = sizeof(struct amdgpu_bo);
+	r = amdgpu_bo_do_create(adev, bp, &bo_ptr);
+	if (r)
+		return r;
+
+	*ubo_ptr = (struct amdgpu_bo_user *)bo_ptr;
+	if ((flags & AMDGPU_GEM_CREATE_SHADOW) && !(adev->flags & AMD_IS_APU)) {
+		if (!bp->resv)
+			WARN_ON(dma_resv_lock((*ubo_ptr)->bo.tbo.base.resv,
+							NULL));
+
+		r = amdgpu_bo_create_shadow(adev, bp->size, bo_ptr);
+
+		if (!bp->resv)
+			dma_resv_unlock((*ubo_ptr)->bo.tbo.base.resv);
+
+		if (r)
+			ttm_bo_put(&(*ubo_ptr)->bo.tbo);
+	}
+
+	return r;
+}
 /**
  * amdgpu_bo_validate - validate an &amdgpu_bo buffer object
  * @bo: pointer to the buffer object
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
index 848dc0a017dd..332e269c3fd1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
@@ -114,6 +114,12 @@ struct amdgpu_bo {
 	struct kgd_mem                  *kfd_bo;
 };
 
+struct amdgpu_bo_user {
+	struct amdgpu_bo		bo;
+	u64				tiling_flags;
+
+};
+
 static inline struct amdgpu_bo *ttm_to_amdgpu_bo(struct ttm_buffer_object *tbo)
 {
 	return container_of(tbo, struct amdgpu_bo, tbo);
@@ -257,6 +263,9 @@ int amdgpu_bo_create_kernel(struct amdgpu_device *adev,
 int amdgpu_bo_create_kernel_at(struct amdgpu_device *adev,
 			       uint64_t offset, uint64_t size, uint32_t domain,
 			       struct amdgpu_bo **bo_ptr, void **cpu_addr);
+int amdgpu_bo_create_user(struct amdgpu_device *adev,
+		     struct amdgpu_bo_param *bp,
+		     struct amdgpu_bo_user **ubo_ptr);
 void amdgpu_bo_free_kernel(struct amdgpu_bo **bo, u64 *gpu_addr,
 			   void **cpu_addr);
 int amdgpu_bo_kmap(struct amdgpu_bo *bo, void **ptr);
diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
index 8b832f7458f2..9b9a4ac6f00f 100644
--- a/include/uapi/drm/amdgpu_drm.h
+++ b/include/uapi/drm/amdgpu_drm.h
@@ -141,6 +141,8 @@ extern "C" {
  * accessing it with various hw blocks
  */
 #define AMDGPU_GEM_CREATE_ENCRYPTED		(1 << 10)
+/* Flag that indicates the BO is created for userspace */
+#define AMDGPU_GEM_CREATE_USER			(1 << 11)
 
 struct drm_amdgpu_gem_create_in  {
 	/** the requested memory size */
-- 
2.30.1