Get and store M-plane related params for xran

radio/fhi_72/mplane/CMakeLists.txt

@@ -30,6 +30,7 @@ target_sources(oran_fhlib_5g_mplane PRIVATE
                rpc-send-recv.c
                get-mplane.c
                subscribe-mplane.c
+               ru-mplane-api.c
                xml/get-xml.c
 )
 

radio/fhi_72/mplane/init-mplane.c

@@ -165,6 +165,11 @@ bool manage_ru(ru_session_t *ru_session, const openair0_config_t *oai, const siz
   AssertError(success, return false, "[MPLANE] Unable to update the watchdog timer. RU will do a reset after default supervision timer of (60+10)[s] expires.\n");
   MP_LOG_I("Watchdog timer answer: \n\t%s\n", watchdog_answer);
 
+  // save RU info for xran
+  const int max_num_ant = max(oai->tx_num_channels/num_rus, oai->rx_num_channels/num_rus);
+  success = get_config_for_xran(operational_ds, max_num_ant, &ru_session->xran_mplane);
+  AssertError(success, return false, "[MPLANE] Unable to retrieve required info for xran from RU \"%s\".\n", ru_session->ru_ip_add);
+
   free(operational_ds);
   free(watchdog_answer);
 

radio/fhi_72/mplane/ru-mplane-api.c

@@ -0,0 +1,127 @@
+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (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.openairinterface.org/?page_id=698
+ *
+ * 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.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+#include "ru-mplane-api.h"
+#include "xml/get-xml.h"
+#include "common/utils/assertions.h"
+
+#include <string.h>
+
+static void free_match_list(char **match_list, size_t count)
+{
+  for (size_t i = 0; i < count; i++) {
+    free(match_list[i]);
+  }
+  free(match_list);
+}
+
+static void fix_benetel_setting(xran_mplane_t *xran_mplane, const uint32_t interface_mtu, const int16_t first_iq_width, const int max_num_ant)
+{
+  if (interface_mtu == 1500) {
+    MP_LOG_I("Interface MTU %d unreliable/not correctly reported by Benetel O-RU, hardcoding to 9600.\n", interface_mtu);
+    xran_mplane->mtu = 9600;
+  } else {
+    xran_mplane->mtu = interface_mtu;
+  }
+
+  if (first_iq_width != 9) {
+    MP_LOG_I("IQ bitwidth %d unreliable/not correctly reported by Benetel O-RU, hardcoding to 9.\n", first_iq_width);
+    xran_mplane->iq_width = 9;
+  } else {
+    xran_mplane->iq_width = first_iq_width;
+  }
+
+  xran_mplane->prach_offset = max_num_ant;
+}
+
+bool get_config_for_xran(const char *buffer, const int max_num_ant, xran_mplane_t *xran_mplane)
+{
+  /* some O-RU vendors are not fully compliant as per M-plane specifications */
+  const char *ru_vendor = get_ru_xml_node(buffer, "mfg-name");
+
+  // RU MAC
+  xran_mplane->ru_mac_addr = get_ru_xml_node(buffer, "mac-address"); // TODO: support for VVDN, as it defines multiple MAC addresses
+
+  // MTU
+  const uint32_t interface_mtu = (uint32_t)atoi(get_ru_xml_node(buffer, "interface-mtu"));
+
+  // IQ bitwidth
+  char **match_list = NULL;
+  size_t count = 0;
+  get_ru_xml_list(buffer, "iq-bitwidth", &match_list, &count);
+  const int16_t first_iq_width = (int16_t)atoi((char *)match_list[0]);
+  free_match_list(match_list, count);
+
+  // PRACH offset
+  // xran_mplane->prach_offset
+
+  // DU port ID bitmask
+  xran_mplane->du_port_bitmask = 0xf000;
+  // Band sector bitmask
+  xran_mplane->band_sector_bitmask = 0x0f00;
+  // CC ID bitmask
+  xran_mplane->ccid_bitmask = 0x00f0;
+  // RU port ID bitmask
+  xran_mplane->ru_port_bitmask = 0x000f;
+
+  // DU port ID
+  xran_mplane->du_port = 0;
+  // Band sector
+  xran_mplane->band_sector = 0;
+  // CC ID
+  xran_mplane->ccid = 0;
+  // RU port ID
+  xran_mplane->ru_port = 0;
+
+  if (strcasecmp(ru_vendor, "BENETEL") == 0 /* || strcmp(ru_vendor, "VVDN-LPRU") == 0 || strcmp(ru_vendor, "Metanoia") == 0 */) {
+    fix_benetel_setting(xran_mplane, interface_mtu, first_iq_width, max_num_ant);
+  } else {
+    AssertError(false, return false, "[MPLANE] %s RU currently not supported.\n", ru_vendor);
+  }
+
+  MP_LOG_I("Storing the following information to forward to xran:\n\
+    RU MAC address %s\n\
+    MTU %d\n\
+    IQ bitwidth %d\n\
+    PRACH offset %d\n\
+    DU port bitmask %d\n\
+    Band sector bitmask %d\n\
+    CC ID bitmask %d\n\
+    RU port ID bitmask %d\n\
+    DU port ID %d\n\
+    Band sector ID %d\n\
+    CC ID %d\n\
+    RU port ID %d\n",
+      xran_mplane->ru_mac_addr,
+      xran_mplane->mtu,
+      xran_mplane->iq_width,
+      xran_mplane->prach_offset,
+      xran_mplane->du_port_bitmask,
+      xran_mplane->band_sector_bitmask,
+      xran_mplane->ccid_bitmask,
+      xran_mplane->ru_port_bitmask,
+      xran_mplane->du_port,
+      xran_mplane->band_sector,
+      xran_mplane->ccid,
+      xran_mplane->ru_port);
+
+  return true;
+}

radio/fhi_72/mplane/ru-mplane-api.h

@@ -92,4 +92,6 @@ typedef struct {
 
 } ru_session_list_t;
 
+bool get_config_for_xran(const char *buffer, const int max_num_ant, xran_mplane_t *xran_mplane);
+
 #endif /* RU_MPLANE_API_H */