feat(nimble): Added support for EATT Credit Based Flow Control Mode

components/bt/CMakeLists.txt

@@ -737,6 +737,7 @@ if(CONFIG_BT_ENABLED)
                     "host/nimble/nimble/nimble/host/store/config/src/ble_store_nvs.c"
                     "host/nimble/nimble/nimble/host/src/ble_gattc_cache.c"
                     "host/nimble/nimble/nimble/host/src/ble_gattc_cache_conn.c"
+                    "host/nimble/nimble/nimble/host/src/ble_eatt.c"
                 )
 
             if(CONFIG_BT_CONTROLLER_DISABLED AND CONFIG_BT_NIMBLE_TRANSPORT_UART)

components/bt/host/nimble/Kconfig.in

@@ -1089,3 +1089,10 @@ menu "Host-controller Transport"
         help
             UART HCI CTS pin
 endmenu
+
+config BT_NIMBLE_EATT_CHAN_NUM
+    int "Maximum number of EATT channels"
+    default 0
+    depends on BT_NIMBLE_ENABLED
+    help
+        Defines the number of channels EATT bearers can use

components/bt/host/nimble/port/include/esp_nimble_cfg.h

@@ -543,6 +543,10 @@
 #define MYNEWT_VAL_BLE_ATT_SVR_NOTIFY (1)
 #endif
 
+#ifndef MYNEWT_VAL_BLE_ATT_SVR_NOTIFY_MULTI
+#define MYNEWT_VAL_BLE_ATT_SVR_NOTIFY_MULTI (1)
+#endif
+
 #ifndef MYNEWT_VAL_BLE_ATT_SVR_QUEUED_WRITE
 #define MYNEWT_VAL_BLE_ATT_SVR_QUEUED_WRITE (1)
 #endif
@@ -567,6 +571,10 @@
 #define MYNEWT_VAL_BLE_ATT_SVR_READ_MULT (1)
 #endif
 
+#ifndef MYNEWT_VAL_BLE_ATT_SVR_READ_MULT_VAR
+#define MYNEWT_VAL_BLE_ATT_SVR_READ_MULT_VAR (1)
+#endif
+
 #ifndef MYNEWT_VAL_BLE_ATT_SVR_READ_TYPE
 #define MYNEWT_VAL_BLE_ATT_SVR_READ_TYPE (1)
 #endif
@@ -583,6 +591,49 @@
 #define MYNEWT_VAL_BLE_ATT_SVR_WRITE_NO_RSP (1)
 #endif
 
+#ifndef MYNEWT_VAL_BLE_EATT_CHAN_NUM
+#define MYNEWT_VAL_BLE_EATT_CHAN_NUM (CONFIG_BT_NIMBLE_EATT_CHAN_NUM)
+#endif
+
+#ifndef MYNEWT_VAL_BLE_EATT_LOG_LVL
+#define MYNEWT_VAL_BLE_EATT_LOG_LVL (1)
+#endif
+
+#ifndef MYNEWT_VAL_BLE_EATT_LOG_MOD
+#define MYNEWT_VAL_BLE_EATT_LOG_MOD (27)
+#endif
+
+#ifndef MYNEWT_VAL_BLE_EATT_MTU
+#define MYNEWT_VAL_BLE_EATT_MTU (128)
+#endif
+
+#ifndef MYNEWT_VAL_BLE_CLIENT_SUPPORTED_FEATURES
+
+#if MYNEWT_VAL_BLE_GATT_CACHING
+#define MYNEWT_VAL_BLE_CLIENT_SUPPORTED_FEATURES_ROBUST_CACHING (1)
+#else
+#define MYNEWT_VAL_BLE_CLIENT_SUPPORTED_FEATURES_ROBUST_CACHING (0)
+#endif //MYNEWT_VAL_BLE_GATT_CACHING
+
+#if CONFIG_BT_NIMBLE_EATT_CHAN_NUM
+#define MYNEWT_VAL_BLE_CLIENT_SUPPORTED_FEATURES_EATT (2)
+#else
+#define MYNEWT_VAL_BLE_CLIENT_SUPPORTED_FEATURES_EATT (0)
+#endif //CONFIG_BT_NIMBLE_EATT_CHAN_NUM
+
+#if MYNEWT_VAL_BLE_ATT_SVR_NOTIFY_MULTI
+#define MYNEWT_VAL_BLE_CLIENT_SUPPORTED_FEATURES_NOTIFY_MULTI (4)
+#else
+#define MYNEWT_VAL_BLE_CLIENT_SUPPORTED_FEATURES_NOTIFY_MULTI (0)
+#endif //MYNEWT_VAL_BLE_ATT_SVR_NOTIFY_MULTI
+
+#define MYNEWT_VAL_BLE_CLIENT_SUPPORTED_FEATURES (                  \
+        MYNEWT_VAL_BLE_CLIENT_SUPPORTED_FEATURES_ROBUST_CACHING |   \
+        MYNEWT_VAL_BLE_CLIENT_SUPPORTED_FEATURES_EATT |             \
+        MYNEWT_VAL_BLE_CLIENT_SUPPORTED_FEATURES_NOTIFY_MULTI       \
+        )
+#endif //MYNEWT_VAL_CLIENT_SUPPORTED_FEATURES
+
 #ifndef MYNEWT_VAL_BLE_GAP_MAX_PENDING_CONN_PARAM_UPDATE
 #define MYNEWT_VAL_BLE_GAP_MAX_PENDING_CONN_PARAM_UPDATE (1)
 #endif
@@ -623,6 +674,10 @@
 #define MYNEWT_VAL_BLE_GATT_NOTIFY (1)
 #endif
 
+#ifndef MYNEWT_VAL_BLE_GATT_NOTIFY_MULTIPLE
+#define MYNEWT_VAL_BLE_GATT_NOTIFY_MULTIPLE (1)
+#endif
+
 #ifndef MYNEWT_VAL_BLE_GATT_READ
 #define MYNEWT_VAL_BLE_GATT_READ (MYNEWT_VAL_BLE_ROLE_CENTRAL)
 #endif
@@ -749,16 +804,26 @@
 #define MYNEWT_VAL_BLE_HS_SYSINIT_STAGE (200)
 #endif
 
+#if CONFIG_BT_NIMBLE_EATT_CHAN_NUM
+#define MYNEWT_VAL_BLE_L2CAP_COC_MAX_NUM (CONFIG_BT_NIMBLE_EATT_CHAN_NUM)
+#else
 #ifndef CONFIG_BT_NIMBLE_L2CAP_COC_MAX_NUM
 #define MYNEWT_VAL_BLE_L2CAP_COC_MAX_NUM (2)
 #else
 #define MYNEWT_VAL_BLE_L2CAP_COC_MAX_NUM CONFIG_BT_NIMBLE_L2CAP_COC_MAX_NUM
-#endif
+#endif //CONFIG_BT_NIMBLE_L2CAP_COC_MAX_NUM
+#endif //CONFIG_BT_NIMBLE_EATT_CHAN_NUM
 
 #ifndef MYNEWT_VAL_BLE_L2CAP_COC_MPS
 #define MYNEWT_VAL_BLE_L2CAP_COC_MPS (MYNEWT_VAL_MSYS_1_BLOCK_SIZE-8)
 #endif
 
+#if CONFIG_BT_NIMBLE_EATT_CHAN_NUM
+#define MYNEWT_VAL_BLE_L2CAP_ENHANCED_COC (1)
+#else
+#define MYNEWT_VAL_BLE_L2CAP_ENHANCED_COC (0)
+#endif
+
 #ifndef MYNEWT_VAL_BLE_L2CAP_JOIN_RX_FRAGS
 #define MYNEWT_VAL_BLE_L2CAP_JOIN_RX_FRAGS (1)
 #endif
@@ -772,8 +837,12 @@
 #endif
 
 #ifndef MYNEWT_VAL_BLE_L2CAP_SIG_MAX_PROCS
+#ifdef CONFIG_BT_NIMBLE_EATT_CHAN_NUM
+#define MYNEWT_VAL_BLE_L2CAP_SIG_MAX_PROCS (CONFIG_BT_NIMBLE_EATT_CHAN_NUM)
+#else
 #define MYNEWT_VAL_BLE_L2CAP_SIG_MAX_PROCS (1)
 #endif
+#endif
 
 #ifndef MYNEWT_VAL_BLE_MESH
 #ifdef CONFIG_BT_NIMBLE_MESH