Support IPC sharing of non paged system memory

Non paged system memory is allocated with node id 0. However, since a
gpu node is required for allocating system memory via KFD, the first
dgpu is used. In hsaKmtShareMemory() if system memory use the same
(first) dgpu.

Change-Id: I85789a89a4e4f7888e3826826401ea89ce4d1718
Signed-off-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>

src/fmm.c

@@ -2597,7 +2597,14 @@ HSAKMT_STATUS fmm_share_memory(void *MemoryAddress,
 	r = validate_nodeid(obj->node_id, &gpu_id);
 	if (r != HSAKMT_STATUS_SUCCESS)
 		return r;
-
+	if (!gpu_id && is_dgpu) {
+		/* Sharing non paged system memory. Use first dgpu which was
+		 * used during allocation. See fmm_allocate_host_gpu()
+		 */
+		r = find_first_dgpu(&gpu_id);
+		if (r != HSAKMT_STATUS_SUCCESS)
+			return r;
+	}
 	exportArgs.handle = obj->handle;
 	exportArgs.gpu_id = gpu_id;