nimble/transport: Add support for IPC ICBMsg transport

Tested with nRF5340.

nimble/controller/src/ble_ll.c

@@ -2006,7 +2006,9 @@ void
 ble_transport_ll_init(void)
 {
     /* Tell the host that we are ready to receive packets */
+#if MYNEWT_VAL(BLE_LL_HCI_NOOP_AFTER_INIT)
     ble_ll_hci_send_noop();
+#endif
 }
 
 int

nimble/controller/syscfg.yml

@@ -226,6 +226,11 @@ syscfg.defs:
             Enables LLCP tracing using HCI vendor-specific events.
         value: '0'
 
+    BLE_LL_HCI_NOOP_AFTER_INIT:
+        description: >
+            Enables sending the NO-OP opcode HCI event after LL init.
+        value: '1'
+
     # Configuration for LL supported features.
     #
     # There are a total 8 features that the LL can support. These can be found
@@ -643,6 +648,9 @@ syscfg.vals.BLE_LL_ISO_BROADCASTER:
 syscfg.vals.'!BLE_HOST && !BABBLESIM':
     BLE_LL_HCI_VS_EVENT_ON_ASSERT: 1
 
+syscfg.vals.'BLE_TRANSPORT_HS=="ipc_icbmsg"':
+    BLE_LL_HCI_NOOP_AFTER_INIT: 0
+
 syscfg.restrictions:
     - BLE_TRANSPORT_LL == "native"
     - BLE_LL_PUBLIC_DEV_ADDR <= 0xffffffffffff

nimble/transport/common/hci_ipc/include/nimble/transport/hci_ipc.h

@@ -21,13 +21,26 @@
 #define _HCI_IPC_H_
 
 #include <stdint.h>
+#include <syscfg/syscfg.h>
 
+#if MYNEWT_VAL(IPC_ICBMSG)
+#include "nimble/hci_common.h"
+#define HCI_IPC_TYPE_CMD                0x01
+#define HCI_IPC_TYPE_ACL                0x02
+/* #define HCI_IPC_TYPE_SCO             0x03 */
+#define HCI_IPC_TYPE_EVT                0x04
+#define HCI_IPC_TYPE_ISO                0x05
+/* These two are not used actually */
+#define HCI_IPC_TYPE_EVT_DISCARDABLE    0x06
+#define HCI_IPC_TYPE_EVT_IN_CMD         0x07
+#else
 #define HCI_IPC_TYPE_CMD                0x01
 #define HCI_IPC_TYPE_ACL                0x02
 #define HCI_IPC_TYPE_EVT                0x04
 #define HCI_IPC_TYPE_EVT_DISCARDABLE    0x05
 #define HCI_IPC_TYPE_EVT_IN_CMD         0x06
 #define HCI_IPC_TYPE_ISO                0x07
+#endif
 
 struct __attribute__((packed)) hci_ipc_hdr {
     uint8_t type;
@@ -55,15 +68,20 @@ struct hci_ipc_shm {
 void hci_ipc_init(volatile struct hci_ipc_shm *shm, struct hci_ipc_sm *sm);
 int hci_ipc_rx(struct hci_ipc_sm *sm, const uint8_t *buf, uint16_t len);
 
+#if !MYNEWT_VAL(IPC_ICBMSG)
 extern void hci_ipc_atomic_put(volatile uint16_t *num);
 extern uint16_t hci_ipc_atomic_get(volatile uint16_t *num);
 
 /* Just to optimize static inlines below, do not use directly! */
 extern volatile struct hci_ipc_shm *g_ipc_shm;
+#endif
 
 static inline int
 hci_ipc_get(uint8_t type)
 {
+#if MYNEWT_VAL(IPC_ICBMSG)
+    return 1;
+#else
     volatile struct hci_ipc_shm *shm = g_ipc_shm;
 
     switch (type) {
@@ -76,11 +94,13 @@ hci_ipc_get(uint8_t type)
     }
 
     return 0;
+#endif
 }
 
 static inline void
 hci_ipc_put(uint8_t type)
 {
+#if !MYNEWT_VAL(IPC_ICBMSG)
     volatile struct hci_ipc_shm *shm = g_ipc_shm;
 
     switch (type) {
@@ -94,6 +114,7 @@ hci_ipc_put(uint8_t type)
         hci_ipc_atomic_put(&shm->n2a_num_evt_disc);
         break;
     }
+#endif
 }
 
 #endif /* _HCI_IPC_H_ */

nimble/transport/common/hci_ipc/src/hci_ipc.c

@@ -87,7 +87,11 @@ hci_ipc_alloc(struct hci_ipc_sm *sm)
 static bool
 hci_ipc_has_hdr(struct hci_ipc_sm *sm)
 {
+#if MYNEWT_VAL(IPC_ICBMSG)
+    return sm->hdr_len == sizeof(sm->hdr.type);
+#else
     return sm->hdr_len == sizeof(sm->hdr);
+#endif
 }
 
 static void
@@ -137,9 +141,33 @@ hci_ipc_frame(struct hci_ipc_sm *sm)
     sm->buf = NULL;
 }
 
+#if MYNEWT_VAL(IPC_ICBMSG)
+static uint16_t
+hci_ipc_get_pkt_size(const uint8_t *buf, uint8_t type)
+{
+    switch (type) {
+    case HCI_IPC_TYPE_ACL:
+        return sizeof(struct hci_data_hdr) + get_le16(&((struct hci_data_hdr *)buf)->hdh_len);
+    case HCI_IPC_TYPE_EVT:
+        return sizeof(struct ble_hci_ev) + ((struct ble_hci_ev *)buf)->length;
+    case HCI_IPC_TYPE_CMD:
+        return sizeof(struct ble_hci_cmd) + ((struct ble_hci_cmd *)buf)->length;
+    case HCI_IPC_TYPE_ISO:
+        return sizeof(struct ble_hci_iso) + get_le16(&((struct ble_hci_iso *)buf)->length);
+    }
+
+    return 0;
+}
+#endif
+
 static uint16_t
 hci_ipc_copy_to_hdr(struct hci_ipc_sm *sm, const uint8_t *buf, uint16_t len)
 {
+#if MYNEWT_VAL(IPC_ICBMSG)
+    len = 1;
+    sm->hdr.type = buf[0];
+    sm->hdr.length = hci_ipc_get_pkt_size(buf + 1, sm->hdr.type);
+#else
     uint16_t rem_hdr_len;
     uint8_t *p;
 
@@ -152,6 +180,7 @@ hci_ipc_copy_to_hdr(struct hci_ipc_sm *sm, const uint8_t *buf, uint16_t len)
 
     p = (void *)&sm->hdr;
     memcpy(p + sm->hdr_len, buf, len);
+#endif
 
     sm->hdr_len += len;
 
@@ -225,10 +254,11 @@ hci_ipc_rx(struct hci_ipc_sm *sm, const uint8_t *buf, uint16_t len)
 void
 hci_ipc_init(volatile struct hci_ipc_shm *shm, struct hci_ipc_sm *sm)
 {
+    memset(sm, 0, sizeof(*sm));
+#if !MYNEWT_VAL(IPC_ICBMSG)
     assert(g_ipc_shm == NULL);
 
     g_ipc_shm = shm;
-    memset(sm, 0, sizeof(*sm));
 
 #if MYNEWT_VAL(BLE_CONTROLLER)
     while (shm->n2a_num_evt_disc == 0) {
@@ -239,4 +269,5 @@ hci_ipc_init(volatile struct hci_ipc_shm *shm, struct hci_ipc_sm *sm)
     shm->n2a_num_evt = MYNEWT_VAL(BLE_TRANSPORT_EVT_COUNT);
     shm->n2a_num_evt_disc = MYNEWT_VAL(BLE_TRANSPORT_EVT_DISCARDABLE_COUNT);
 #endif
+#endif
 }

nimble/transport/common/hci_ipc/syscfg.yml

@@ -0,0 +1,24 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#  http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+syscfg.defs:
+    IPC_ICBMSG:
+        description: 'Enables ICBMsg backend for IPC.'
+        value: 0
+
+syscfg.vals.'BLE_TRANSPORT_LL=="ipc_icbmsg" || BLE_TRANSPORT_HS=="ipc_icbmsg"':
+    IPC_ICBMSG: 1

nimble/transport/ipc_icbmsg/pkg.yml

@@ -0,0 +1,36 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#  http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+pkg.name: nimble/transport/ipc_icbmsg
+pkg.description: HCI transport via IPC with ICBMsg backend
+pkg.author: "Apache Mynewt <[email protected]>"
+pkg.homepage: "http://mynewt.apache.org/"
+pkg.keywords:
+    - ble
+    - bluetooth
+    - ipc_icbmsg
+
+pkg.deps:
+    - nimble
+    - nimble/transport/common/hci_ipc
+    - "@apache-mynewt-core/kernel/os"
+    - "@apache-mynewt-core/hw/drivers/ipc_icbmsg"
+
+pkg.apis:
+    - ble_transport