L3 Bus Driver-------------The structure of the driver is as follows:	+----------+	+----------+	+----------+	| client 1 |	| client 2 |	| client 3 |	+-----^----+	+----^-----+	+----^-----+	      |		     |               |	+-----v--------------v---------------v-----+	|                                          |	+-----^-------+              +-------^-----+	      |	      |     core     |       |	+-----v----+  |	             |  +----v-----+	| device   |  |	             |  | device   |	| driver 1 |  |              |	| driver 2 |	+-----^----+  |              |  +----^-----+	      |	      |	  services   |       |	+-----v-------+              +-------v-----+	|                                          |	+-----------------^----^-------------------+			  |    |			  |  +-v---------+			  |  | algorithm |			  |  |  driver   |			  |  +-v---------+			  |    |			+-v----v-+			|  bus   |			| driver |			+--------+Clients talk to the core to attach device drivers and bus adapters, andto instruct device drivers to perform actions.  Device drivers then talkto the core to perform L3 bus transactions via the algorithm driver andultimately bus driver.