Bluetooth: controller: Enable use of proprietary rx demuxing functions

Code refactored to allow calling of a proprietary rx demux function.
This will enable implementation of proprietary protocols and
functionality that is not yet public, while keeping a common zephyr
code base.

Signed-off-by: Asger Munk Nielsen <asmk@oticon.com>

subsys/bluetooth/controller/Kconfig

@@ -750,4 +750,19 @@ config BT_MAYFLY_YIELD_AFTER_CALL
 	  If set to 'n', all pending mayflies for callee are executed before
 	  yielding
 
+config BT_CTLR_USER_EXT
+	prompt "Enable proprietary extensions in Controller"
+	bool
+	help
+	  Catch-all for enabling proprietary event types in Controller behavior.
+
+config BT_CTLR_USER_EVT_RANGE
+	int "Range of event contants reserved for proprietary event types"
+	depends on BT_CTLR_USER_EXT
+	default 5
+	range 0 10
+	help
+	  Number of event types reserved for proprietary use. The range
+	  is typically used when BT_CTLR_USER_EXT is in use.
+
 endif # BT_CTLR

subsys/bluetooth/controller/ll_sw/lll.h

@@ -173,8 +173,15 @@ enum node_rx_type {
 	NODE_RX_TYPE_MESH_ADV_CPLT = 0x13,
 	NODE_RX_TYPE_MESH_REPORT = 0x14,
 #endif /* CONFIG_BT_HCI_MESH_EXT */
-};
 
+/* Following proprietary defines must be at end of enum range */
+#if defined(CONFIG_BT_CTLR_USER_EXT)
+	NODE_RX_TYPE_USER_START = 0x15,
+	NODE_RX_TYPE_USER_END = NODE_RX_TYPE_USER_START +
+				CONFIG_BT_CTLR_USER_EVT_RANGE,
+#endif /* CONFIG_BT_CTLR_USER_EXT */
+
+};
 
 /* Footer of node_rx_hdr */
 struct node_rx_ftr {
@@ -208,6 +215,13 @@ struct node_rx_pdu {
 enum {
 	EVENT_DONE_EXTRA_TYPE_NONE,
 	EVENT_DONE_EXTRA_TYPE_CONN,
+/* Following proprietary defines must be at end of enum range */
+#if defined(CONFIG_BT_CTLR_USER_EXT)
+	EVENT_DONE_EXTRA_TYPE_USER_START,
+	EVENT_DONE_EXTRA_TYPE_USER_END = EVENT_DONE_EXTRA_TYPE_USER_START +
+		CONFIG_BT_CTLR_USER_EVT_RANGE,
+#endif /* CONFIG_BT_CTLR_USER_EXT */
+
 };
 
 struct event_done_extra_slave {

subsys/bluetooth/controller/ll_sw/ull.c

@@ -45,6 +45,10 @@
 #include "ull_scan_internal.h"
 #include "ull_conn_internal.h"
 
+#if defined(CONFIG_BT_CTLR_USER_EXT)
+#include "ull_vendor.h"
+#endif /* CONFIG_BT_CTLR_USER_EXT */
+
 #define LOG_MODULE_NAME bt_ctlr_llsw_ull
 #include "common/log.h"
 #include "hal/debug.h"
@@ -516,6 +520,9 @@ void ll_rx_dequeue(void)
 	case NODE_RX_TYPE_MESH_REPORT:
 #endif /* CONFIG_BT_HCI_MESH_EXT */
 
+#if defined(CONFIG_BT_CTLR_USER_EXT)
+	case NODE_RX_TYPE_USER_START ... NODE_RX_TYPE_USER_END:
+#endif /* CONFIG_BT_CTLR_USER_EXT */
 		/*
 		 * We have just dequeued from memq_ll_rx; that frees up some
 		 * quota for Link Layer. Note that we threw away the rx node
@@ -741,6 +748,10 @@ void ll_rx_mem_release(void **node_rx)
 		case NODE_RX_TYPE_MESH_REPORT:
 #endif /* CONFIG_BT_HCI_MESH_EXT */
 
+#if defined(CONFIG_BT_CTLR_USER_EXT)
+		case NODE_RX_TYPE_USER_START ... NODE_RX_TYPE_USER_END:
+#endif /* CONFIG_BT_CTLR_USER_EXT */
+
 			mem_release(rx_free, &mem_pdu_rx.free);
 			break;
 
@@ -1473,7 +1484,13 @@ static inline int rx_demux_rx(memq_link_t *link, struct node_rx_hdr *rx)
 
 	default:
 	{
+#if defined(CONFIG_BT_CTLR_USER_EXT)
+		/* Try proprietary demuxing */
+		rx_demux_rx_proprietary(link, rx, memq_ull_rx.tail,
+					&memq_ull_rx.head);
+#else
 		LL_ASSERT(0);
+#endif /* CONFIG_BT_CTLR_USER_EXT */
 	}
 	break;
 	}
@@ -1498,6 +1515,14 @@ static inline void rx_demux_event_done(memq_link_t *link,
 		ull_conn_done(done);
 		break;
 #endif /* CONFIG_BT_CONN */
+
+#if defined(CONFIG_BT_CTLR_USER_EXT)
+	case EVENT_DONE_EXTRA_TYPE_USER_START
+		... EVENT_DONE_EXTRA_TYPE_USER_END:
+		ull_proprietary_done(done);
+		break;
+#endif /* CONFIG_BT_CTLR_USER_EXT */
+
 	case EVENT_DONE_EXTRA_TYPE_NONE:
 		/* ignore */
 		break;