Bluetooth: controller: Add Kconfig for maximum Broadcast ISO PDU length

Added Kconfig option to configure the maximum Broadcast and
Synchronized Receiver ISO PDU length.

Signed-off-by: Vinayak Kariappa Chettimada <[email protected]>

Author: cvinayak

subsys/bluetooth/controller/Kconfig

@@ -448,6 +448,13 @@ config BT_CTLR_ADV_SET
 	help
 	  Maximum supported advertising sets.
 
+config BT_CTLR_ADV_DATA_LEN_MAX
+	int "Maximum Advertising Data Length"
+	range 31 1650
+	default 251
+	help
+	  Maximum Extended Advertising Data Length.
+
 config BT_CTLR_ADV_PERIODIC
 	bool "LE Periodic Advertising in Advertising State" if !BT_LL_SW_SPLIT
 	depends on BT_BROADCASTER && BT_CTLR_ADV_PERIODIC_SUPPORT
@@ -506,11 +513,22 @@ config BT_CTLR_ADV_ISO_SET
 	help
 	  Maximum supported advertising sets.
 
-config BT_CTLR_ADV_DATA_LEN_MAX
-	int "Maximum Advertising Data Length"
-	range 31 1650
+config BT_CTLR_ADV_ISO_PDU_LEN_MAX
+	int "Maximum Broadcast Isochronous Channel PDU Length"
+	depends on BT_CTLR_ADV_ISO
+	range 27 251
+	default 251
 	help
-	  Maximum Extended Advertising Data Length.
+	  Maximum Broadcast Isochronous Channel PDU Length.
+
+config BT_CTLR_SYNC_ISO_PDU_LEN_MAX
+	int "Maximum Synchronized Isochronous Channel PDU Length"
+	depends on BT_CTLR_SYNC_ISO
+	range 251 251 if BT_HCI_RAW
+	range 27 251
+	default 251
+	help
+	  Maximum Synchronized Receiver Isochronous Channel PDU Length.
 
 endif # BT_CTLR_ADV_EXT
 

subsys/bluetooth/controller/include/ll_feat.h

@@ -154,14 +154,18 @@
 
 #if defined(CONFIG_BT_CTLR_ADV_ISO)
 #define LL_FEAT_BIT_ISO_BROADCASTER BIT64(BT_LE_FEAT_BIT_ISO_BROADCASTER)
+#define LL_BIS_OCTETS_TX_MAX CONFIG_BT_CTLR_ADV_ISO_PDU_LEN_MAX
 #else /* !CONFIG_BT_CTLR_ADV_ISO */
 #define LL_FEAT_BIT_ISO_BROADCASTER 0
+#define LL_BIS_OCTETS_TX_MAX 0
 #endif /* !CONFIG_BT_CTLR_ADV_ISO */
 
 #if defined(CONFIG_BT_CTLR_SYNC_ISO)
 #define LL_FEAT_BIT_SYNC_RECEIVER BIT64(BT_LE_FEAT_BIT_SYNC_RECEIVER)
+#define LL_BIS_OCTETS_RX_MAX CONFIG_BT_CTLR_SYNC_ISO_PDU_LEN_MAX
 #else /* !CONFIG_BT_CTLR_SYNC_ISO */
 #define LL_FEAT_BIT_SYNC_RECEIVER 0
+#define LL_BIS_OCTETS_RX_MAX 0
 #endif /* !CONFIG_BT_CTLR_SYNC_ISO */
 
 /* All defined feature bits */

subsys/bluetooth/controller/ll_sw/pdu.h

@@ -63,7 +63,7 @@
 #define PDU_AC_LL_SIZE_MAX     (PDU_AC_LL_HEADER_SIZE + PDU_AC_PAYLOAD_SIZE_MAX)
 
 /* Advertisement channel maximum legacy advertising/scan data size */
-#define PDU_AC_DATA_SIZE_MAX 31
+#define PDU_AC_DATA_SIZE_MAX   31
 
 /* Advertisement channel Access Address */
 #define PDU_AC_ACCESS_ADDR     0x8e89bed6
@@ -78,6 +78,9 @@
 /* Link Layer Max size of an empty PDU. TODO: Remove; only used in Nordic LLL */
 #define PDU_EM_LL_SIZE_MAX     (PDU_DC_LL_HEADER_SIZE)
 
+/* Link Layer header size of BIS PDU. Assumes pdu_bis is packed */
+#define PDU_BIS_LL_HEADER_SIZE (offsetof(struct pdu_bis, payload))
+
 /* Event interframe timings */
 #define EVENT_IFS_US            150
 /* Standard allows 2 us timing uncertainty inside the event */

subsys/bluetooth/controller/ll_sw/ull.c

@@ -336,11 +336,14 @@ static MFIFO_DEFINE(pdu_rx_free, sizeof(void *), PDU_RX_CNT);
 #else
 #define PDU_RX_USER_PDU_OCTETS_MAX 0
 #endif
+
 #define NODE_RX_HEADER_SIZE      (offsetof(struct node_rx_pdu, pdu))
 #define NODE_RX_STRUCT_OVERHEAD  (NODE_RX_HEADER_SIZE)
 
 #define PDU_ADVERTIZE_SIZE (PDU_AC_LL_SIZE_MAX + PDU_AC_LL_SIZE_EXTRA)
-#define PDU_DATA_SIZE      (PDU_DC_LL_HEADER_SIZE + LL_LENGTH_OCTETS_RX_MAX)
+
+#define PDU_DATA_SIZE MAX((PDU_DC_LL_HEADER_SIZE + LL_LENGTH_OCTETS_RX_MAX), \
+			  (PDU_BIS_LL_HEADER_SIZE + LL_BIS_OCTETS_RX_MAX))
 
 #define PDU_RX_NODE_POOL_ELEMENT_SIZE                         \
 	MROUND(                                               \