fapi_5g/source/api/fapi2mac/p7/nr5g_fapi_proc_srs_ind.c

   1 /******************************************************************************
   2 *
   3 *   Copyright (c) 2019 Intel.
   4 *
   5 *   Licensed under the Apache License, Version 2.0 (the "License");
   6 *   you may not use this file except in compliance with the License.
   7 *   You may obtain a copy of the License at
   8 *
   9 *       http://www.apache.org/licenses/LICENSE-2.0
  10 *
  11 *   Unless required by applicable law or agreed to in writing, software
  12 *   distributed under the License is distributed on an "AS IS" BASIS,
  13 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 *   See the License for the specific language governing permissions and
  15 *   limitations under the License.
  16 *
  17 *******************************************************************************/
  18
  19 /**
  20  * @file
  21  * This file consist of implementation of FAPI SRS.indication message.
  22  *
  23  **/
  24
  25 #include "nr5g_fapi_framework.h"
  26 #include "gnb_l1_l2_api.h"
  27 #include "nr5g_fapi_fapi2mac_api.h"
  28 #include "nr5g_fapi_fapi2mac_p7_proc.h"
  29 #include "nr5g_fapi_fapi2mac_p7_pvt_proc.h"
  30
  31  /** @ingroup group_source_api_p7_fapi2mac_proc
  32  *
  33  *  @param[in]  p_phy_ctx Pointer to PHY context.
  34  *  @param[in]  p_phy_srs_ind Pointer to FAPI SRS.indication message structure.
  35  *
  36  *  @return     Returns ::SUCCESS and ::FAILURE.
  37  *
  38  *  @description
  39  *  This message includes SRS PDU.
  40  *
  41 **/
  42 uint8_t nr5g_fapi_srs_indication(
  43     p_nr5g_fapi_phy_ctx_t p_phy_ctx,
  44     PRXSRSIndicationStruct p_phy_srs_ind)
  45 {
  46     uint8_t phy_id;
  47     fapi_srs_indication_t *p_fapi_srs_ind;
  48     p_fapi_api_queue_elem_t p_list_elem;
  49     p_nr5g_fapi_phy_instance_t p_phy_instance = NULL;
  50     nr5g_fapi_stats_t *p_stats;
  51
  52     if (NULL == p_phy_ctx) {
  53         NR5G_FAPI_LOG(ERROR_LOG, ("[SRS.indication] Invalid " "Phy Context"));
  54         return FAILURE;
  55     }
  56
  57     if (NULL == p_phy_srs_ind) {
  58         NR5G_FAPI_LOG(ERROR_LOG, ("[SRS.indication] Invalid "
  59                 "SRS Indication"));
  60         return FAILURE;
  61     }
  62
  63     phy_id = p_phy_srs_ind->sSFN_Slot.nCarrierIdx;
  64     p_phy_instance = &p_phy_ctx->phy_instance[phy_id];
  65     if (p_phy_instance->phy_id != phy_id) {
  66         NR5G_FAPI_LOG(ERROR_LOG, ("[SRS.indication] Invalid " "Phy Instance"));
  67         return FAILURE;
  68     }
  69
  70     p_stats = &p_phy_instance->stats;
  71     p_stats->iapi_stats.iapi_srs_ind++;
  72
  73     p_list_elem =
  74         nr5g_fapi_fapi2mac_create_api_list_elem(FAPI_SRS_INDICATION, 1,
  75         sizeof(fapi_srs_indication_t));
  76     if (!p_list_elem) {
  77         NR5G_FAPI_LOG(ERROR_LOG, ("[SRS.indication] Unable "
  78                 "to create list element. Out of memory!!!"));
  79         return FAILURE;
  80     }
  81
  82     p_fapi_srs_ind = (fapi_srs_indication_t *) (p_list_elem + 1);
  83     p_fapi_srs_ind->header.msg_id = FAPI_SRS_INDICATION;
  84     p_fapi_srs_ind->header.length = (uint16_t) sizeof(fapi_srs_indication_t);
  85
  86     if (nr5g_fapi_srs_indication_to_fapi_translation(p_phy_instance,
  87             p_phy_srs_ind, p_fapi_srs_ind)) {
  88         NR5G_FAPI_LOG(ERROR_LOG,
  89             ("[SRS.indication] L1 to FAPI " "translation failed"));
  90         return FAILURE;
  91     }
  92
  93     /* Add element to send list */
  94     nr5g_fapi_fapi2mac_add_api_to_list(phy_id, p_list_elem);
  95
  96     p_stats->fapi_stats.fapi_srs_ind++;
  97     NR5G_FAPI_LOG(DEBUG_LOG, ("[SRS.indication][%d][%d,%d]",
  98             p_phy_instance->phy_id,
  99             p_phy_srs_ind->sSFN_Slot.nSFN,
 100             p_phy_srs_ind->sSFN_Slot.nSlot));
 101
 102     return SUCCESS;
 103 }
 104
 105  /** @ingroup group_source_api_p7_fapi2mac_proc
 106  *
 107  *  @param[in]   ue_id  Variable holding ue_id received SRS.Indication..
 108  *  @param[in]   p_ul_slot_info Pointer to ul slot info structure that stores the
 109  *               UL_TTI.request PDU info.
 110  *
 111  *  @return     Returns Pointer to srs info, if handle of p_ul_slot_info matches ue_id.
 112                         NULL, if handle of p_ul_slot_info not matches ue_id
 113  *
 114  *  @description
 115  *  This function retrieves the srs info stored during corresponding UL_TTI.request processing.
 116  *  based on ue_id.
 117  *
 118 **/
 119 nr5g_fapi_srs_info_t *nr5g_fapi_get_srs_info(
 120     uint16_t nUEId,
 121     nr5g_fapi_ul_slot_info_t * p_ul_slot_info)
 122 {
 123     uint8_t i, num_srs;
 124
 125     nr5g_fapi_srs_info_t *p_srs_info;
 126
 127     num_srs = p_ul_slot_info->num_srs;
 128     for (i = 0; i < num_srs; i++) {
 129         p_srs_info = &p_ul_slot_info->srs_info[i];
 130         if (p_srs_info->handle == nUEId) {
 131             return p_srs_info;
 132         }
 133     }
 134     return NULL;
 135 }
 136
 137  /** @ingroup group_source_api_p7_fapi2mac_proc
 138  *
 139  *  @param[in]  p_phy_instance Pointer to PHY instance.
 140  *  @param[in]   p_phy_srs_ind Pointer to IAPI SRS.indication structure.
 141  *  @param[out]  p_fapi_srs_ind Pointer to FAPI SRS.indication structure.
 142  *
 143  *  @return     Returns ::SUCCESS and ::FAILURE.
 144  *
 145  *  @description
 146  *  This function converts IAPI SRS.indication to FAPI SRS.indication
 147  *  structure.
 148  *
 149 **/
 150 uint8_t nr5g_fapi_srs_indication_to_fapi_translation(
 151     p_nr5g_fapi_phy_instance_t p_phy_instance,
 152     PRXSRSIndicationStruct p_phy_srs_ind,
 153     fapi_srs_indication_t * p_fapi_srs_ind)
 154 {
 155     uint8_t num_srs_pdus, i;
 156     uint8_t slot_no, num_rept_symbols, nr_of_symbols;
 157     uint16_t frame_no, num_rbs, j, k;
 158     int8_t wideband_snr = 0, rb_snr;
 159     int16_t temp = 0;
 160
 161     nr5g_fapi_srs_info_t *p_srs_info;
 162     fapi_srs_pdu_t *p_fapi_srs_pdu;
 163     fapi_symb_snr_t *p_fapi_symb_snr;
 164     nr5g_fapi_ul_slot_info_t *p_ul_slot_info;
 165     nr5g_fapi_stats_t *p_stats;
 166     ULSRSEstStruct *p_ul_srs_est_struct;
 167
 168     p_stats = &p_phy_instance->stats;
 169
 170     frame_no = p_fapi_srs_ind->sfn = p_phy_srs_ind->sSFN_Slot.nSFN;
 171     slot_no = p_fapi_srs_ind->slot = p_phy_srs_ind->sSFN_Slot.nSlot;
 172
 173     p_ul_slot_info =
 174         nr5g_fapi_get_ul_slot_info(frame_no, slot_no, p_phy_instance);
 175
 176     if (p_ul_slot_info == NULL) {
 177         NR5G_FAPI_LOG(ERROR_LOG, ("[SRS.indication] No Valid data available "
 178                 "for frame :%d and slot: %d", frame_no, slot_no));
 179         return FAILURE;
 180     }
 181
 182     num_srs_pdus = p_fapi_srs_ind->numPdus = p_phy_srs_ind->nNrOfSrs;
 183     for (i = 0; i < num_srs_pdus; i++) {
 184         p_stats->iapi_stats.iapi_srs_ind_pdus++;
 185         p_fapi_srs_pdu = &p_fapi_srs_ind->srsPdus[i];
 186         p_ul_srs_est_struct = &p_phy_srs_ind->sULSRSEstStruct[i];
 187         p_srs_info =
 188             nr5g_fapi_get_srs_info(p_ul_srs_est_struct->nUEId, p_ul_slot_info);
 189         if (p_srs_info == NULL) {
 190             NR5G_FAPI_LOG(ERROR_LOG,
 191                 ("[SRS.indication] No Valid data available "
 192                     "for nUEId:%d with frameno:%d, slot_no:%d",
 193                     p_ul_srs_est_struct->nUEId, frame_no, slot_no));
 194             return FAILURE;
 195         }
 196
 197         p_fapi_srs_pdu->handle = p_srs_info->handle;
 198         p_fapi_srs_pdu->rnti = p_ul_srs_est_struct->nRNTI;
 199         p_fapi_srs_pdu->timingAdvance = 0xFFFF;
 200
 201         nr_of_symbols = p_fapi_srs_pdu->numSymbols =
 202             p_ul_srs_est_struct->nNrOfSymbols;
 203         for (j = 0; j < nr_of_symbols; j++) {
 204             temp += p_ul_srs_est_struct->nWideBandSNR[j];
 205         }
 206         wideband_snr = temp / nr_of_symbols;
 207
 208         p_fapi_srs_pdu->wideBandSnr = (wideband_snr + 64) * 2;
 209         num_rept_symbols = p_fapi_srs_pdu->numReportedSymbols = 1;
 210
 211         for (j = 0; j < num_rept_symbols; j++) {
 212             p_fapi_symb_snr = &p_fapi_srs_pdu->symbSnr[j];
 213             num_rbs = p_fapi_symb_snr->numRbs =
 214                 p_ul_srs_est_struct->nNrOfBlocks * 4;
 215
 216             for (k = 0; k < num_rbs; k++) {
 217                 rb_snr = p_ul_srs_est_struct->nBlockSNR[k / 68][k % 68];
 218                 p_fapi_symb_snr->rbSNR[k] = (rb_snr + 64) * 2;
 219             }
 220         }
 221         p_stats->fapi_stats.fapi_srs_ind_pdus++;
 222     }
 223
 224     return SUCCESS;
 225 }