2 files changed, 53 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 6bf16d95e7e4..cfc6c786b2f2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1062,6 +1062,9 @@ struct amdgpu_bo_list {
 struct amdgpu_bo_list *
 amdgpu_bo_list_get(struct amdgpu_fpriv *fpriv, int id);
 void amdgpu_bo_list_put(struct amdgpu_bo_list *list);
+void amdgpu_bo_list_copy(struct amdgpu_device *adev,
+                         struct amdgpu_bo_list *dst,
+                         struct amdgpu_bo_list *src);
 void amdgpu_bo_list_free(struct amdgpu_bo_list *list);
 
 /*
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c
index f82a2dd83874..4d27fa1660b9 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_bo_list.c
@@ -166,6 +166,56 @@ void amdgpu_bo_list_put(struct amdgpu_bo_list *list)
         mutex_unlock(&list->lock);
 }
 
+void amdgpu_bo_list_copy(struct amdgpu_device *adev,
+                         struct amdgpu_bo_list *dst,
+                         struct amdgpu_bo_list *src)
+{
+        struct amdgpu_bo_list_entry *array;
+        struct amdgpu_bo *gds_obj = adev->gds.gds_gfx_bo;
+        struct amdgpu_bo *gws_obj = adev->gds.gws_gfx_bo;
+        struct amdgpu_bo *oa_obj = adev->gds.oa_gfx_bo;
+
+        bool has_userptr = false;
+        unsigned i;
+
+        array = drm_calloc_large(src->num_entries, sizeof(struct amdgpu_bo_list_entry));
+        if (!array)
+                return;
+        memset(array, 0, src->num_entries * sizeof(struct amdgpu_bo_list_entry));
+
+        for (i = 0; i < src->num_entries; ++i) {
+                memcpy(array, src->array,
+                       src->num_entries * sizeof(struct amdgpu_bo_list_entry));
+                array[i].robj = amdgpu_bo_ref(src->array[i].robj);
+                if (amdgpu_ttm_tt_has_userptr(array[i].robj->tbo.ttm)) {
+                        has_userptr = true;
+                        array[i].prefered_domains = AMDGPU_GEM_DOMAIN_GTT;
+                        array[i].allowed_domains = AMDGPU_GEM_DOMAIN_GTT;
+                }
+                array[i].tv.bo = &array[i].robj->tbo;
+                array[i].tv.shared = true;
+
+                if (array[i].prefered_domains == AMDGPU_GEM_DOMAIN_GDS)
+                        gds_obj = array[i].robj;
+                if (array[i].prefered_domains == AMDGPU_GEM_DOMAIN_GWS)
+                        gws_obj = array[i].robj;
+                if (array[i].prefered_domains == AMDGPU_GEM_DOMAIN_OA)
+                        oa_obj = array[i].robj;
+        }
+
+        for (i = 0; i < dst->num_entries; ++i)
+                amdgpu_bo_unref(&dst->array[i].robj);
+
+        drm_free_large(dst->array);
+
+        dst->gds_obj = gds_obj;
+        dst->gws_obj = gws_obj;
+        dst->oa_obj = oa_obj;
+        dst->has_userptr = has_userptr;
+        dst->array = array;
+        dst->num_entries = src->num_entries;
+}
+
 void amdgpu_bo_list_free(struct amdgpu_bo_list *list)
 {
         unsigned i;