Bluetooth: controller: Make per. adv. PDUs count related to max CTE num

Amount of memory allocated for advertising PDUs (including
periodic advertising) depends on two factors:
- maximum advertising data length
- maximum number of CTE in a periodic advertising chain.

Maximum advertising data length is divided by maximum size
of a single fragment (number of payload bytes that single
advertising PDU may hold) to get required number of fragments.

Actual number of PDUs allocated for advertising is maximum
of acutal number of advertising payload fragments and maximum
number of CTEs.

Signed-off-by: Piotr Pryga <[email protected]>

Author: ppryga-nordic

subsys/bluetooth/controller/ll_sw/nordic/lll/lll_adv.c

@@ -83,9 +83,10 @@ static inline bool isr_rx_ci_adva_check(uint8_t tx_addr, uint8_t *addr,
 					struct pdu_adv *ci);
 
 #if defined(CONFIG_BT_CTLR_ADV_EXT)
-#define PAYLOAD_FRAG_COUNT   ((CONFIG_BT_CTLR_ADV_DATA_LEN_MAX + \
-			       PDU_AC_PAYLOAD_SIZE_MAX - 1) / \
-			      PDU_AC_PAYLOAD_SIZE_MAX)
+#define PAYLOAD_BASED_FRAG_COUNT ((CONFIG_BT_CTLR_ADV_DATA_LEN_MAX + \
+				   PDU_AC_PAYLOAD_SIZE_MAX - 1) / \
+				  PDU_AC_PAYLOAD_SIZE_MAX)
+#define PAYLOAD_FRAG_COUNT MAX(PAYLOAD_BASED_FRAG_COUNT, BT_CTLR_DF_PER_ADV_CTE_NUM_MAX)
 #define BT_CTLR_ADV_AUX_SET  CONFIG_BT_CTLR_ADV_AUX_SET
 #if defined(CONFIG_BT_CTLR_ADV_PERIODIC)
 #define BT_CTLR_ADV_SYNC_SET CONFIG_BT_CTLR_ADV_SYNC_SET

subsys/bluetooth/controller/ll_sw/nordic/lll/lll_df_types.h

@@ -22,6 +22,12 @@
 #define BT_CTLR_DF_MAX_ANT_SW_PATTERN_LEN 0
 #endif
 
+#if defined(CONFIG_BT_CTLR_DF_PER_ADV_CTE_NUM_MAX)
+#define BT_CTLR_DF_PER_ADV_CTE_NUM_MAX CONFIG_BT_CTLR_DF_PER_ADV_CTE_NUM_MAX
+#else
+#define BT_CTLR_DF_PER_ADV_CTE_NUM_MAX 0
+#endif
+
 /* @brief Configuration of Constant Tone Extension for connectionless
  * transmission.
  */