Front Haul Interface Library first seed code contribution

[o-du/phy.git] / fhi_lib / lib / src / xran_transport.c

diff --git a/fhi_lib/lib/src/xran_transport.c b/fhi_lib/lib/src/xran_transport.c
new file mode 100644 (file)
index 0000000..9e1d192
--- /dev/null
+++ b/fhi_lib/lib/src/xran_transport.c
@@ -0,0 +1,101 @@
+/******************************************************************************
+*
+*   Copyright (c) 2019 Intel.
+*
+*   Licensed 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.
+*
+*******************************************************************************/
+
+
+/**
+ * @brief This file provides the implementation for Transport lyaer (eCPRI) API.
+ *
+ * @file xran_transport.c
+ * @ingroup group_lte_source_xran
+ * @author Intel Corporation
+ *
+ **/
+
+#include <stdint.h>
+#include <endian.h>
+#include <rte_common.h>
+#include <rte_config.h>
+
+#include "xran_fh_lls_cu.h"
+#include "xran_common.h"
+#include "xran_transport.h"
+#include "xran_up_api.h"
+
+
+/**
+ * @brief Compose ecpriRtcid/ecpriPcid
+ *
+ * @param CU_Port_ID CU Port ID
+ * @param BanbSector_ID Band Sector ID
+ * @param CC_ID Component Carrier ID
+ * @param Ant_ID RU Port ID (antenna ID)
+ * @return uint16_t composed ecpriRtcid/ecpriPcid (network byte order)
+ */
+inline uint16_t xran_compose_cid(uint8_t CU_Port_ID, uint8_t BandSector_ID, uint8_t CC_ID, uint8_t Ant_ID)
+{
+  uint16_t cid;
+  XRANEAXCIDCONFIG *conf;
+
+    conf = xran_get_conf_eAxC(NULL);
+
+    cid = ((CU_Port_ID      << conf->bit_cuPortId)      & conf->mask_cuPortId)
+        | ((BandSector_ID   << conf->bit_bandSectorId)  & conf->mask_bandSectorId)
+        | ((CC_ID           << conf->bit_ccId)          & conf->mask_ccId)
+        | ((Ant_ID          << conf->bit_ruPortId)      & conf->mask_ruPortId);
+
+    return (rte_cpu_to_be_16(cid));
+}
+
+/**
+ * @brief Decompose ecpriRtcid/ecpriPcid
+ *
+ * @param cid composed ecpriRtcid/ecpriPcid (network byte order)
+ * @param result the pointer of the structure to store decomposed values
+ * @return none
+ */
+inline void xran_decompose_cid(uint16_t cid, struct xran_eaxc_info *result)
+{
+  XRANEAXCIDCONFIG *conf;
+
+    conf = xran_get_conf_eAxC(NULL);
+    cid = rte_be_to_cpu_16(cid);
+
+    result->cuPortId        = (cid&conf->mask_cuPortId)     >> conf->bit_cuPortId;
+    result->bandSectorId    = (cid&conf->mask_bandSectorId) >> conf->bit_bandSectorId;
+    result->ccId            = (cid&conf->mask_ccId)         >> conf->bit_ccId;
+    result->ruPortId        = (cid&conf->mask_ruPortId)     >> conf->bit_ruPortId;
+
+    return;
+}
+
+/**
+ * @brief modify the payload size of eCPRI header in xRAN packet
+ *
+ * @param mbuf Initialized rte_mbuf packet which has eCPRI header already
+ * @param size payload size to be updated
+ * @return none
+ */
+inline void xran_update_ecpri_payload_size(struct rte_mbuf *mbuf, int size)
+{
+  struct xran_ecpri_hdr *ecpri_hdr;
+
+    ecpri_hdr = rte_pktmbuf_mtod(mbuf, struct xran_ecpri_hdr *);
+
+    ecpri_hdr->ecpri_payl_size = rte_cpu_to_be_16(size);
+}
+