Change-Id: I9567d64f9d00262e36147e8d7e541e5e246bda5f Related: OS#5500changes/43/30743/12
parent
e15996378f
commit
2b462dd89d
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#pragma once
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#include <osmocom/core/linuxlist.h>
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#include <stdint.h>
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struct l1gprs_state;
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struct msgb;
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struct l1gprs_tbf {
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/*! Item in l1gprs_state->tbf_list */
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struct llist_head list;
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/*! Uplink or Downlink */
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bool uplink;
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/*! TBF reference number (not index) */
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uint8_t tbf_ref;
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/*! PDCH timeslots used by this TBF */
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uint8_t slotmask;
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/*! (Downlink only) DL TFI (Temporary Flow Indentity): 0..31 */
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uint8_t dl_tfi;
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};
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struct l1gprs_pdch {
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/*! Timeslot number */
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uint8_t tn;
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/*! Backpointer to l1gprs_state we belong to */
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struct l1gprs_state *gprs;
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/*! UL TBF count */
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uint8_t ul_tbf_count;
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/*! DL TBF count */
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uint8_t dl_tbf_count;
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/*! DL TFI mask */
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uint32_t dl_tfi_mask;
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};
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struct l1gprs_state {
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/*! PDCH state for each timeslot */
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struct l1gprs_pdch pdch[8];
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/*! Uplink and Downlink TBFs */
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struct llist_head tbf_list;
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/*! Logging context (used as prefix for messages) */
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char *log_prefix;
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/*! Some private data for API user */
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void *priv;
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};
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void l1gprs_logging_init(int logc);
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struct l1gprs_state *l1gprs_state_alloc(void *ctx, const char *log_prefix, void *priv);
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void l1gprs_state_free(struct l1gprs_state *gprs);
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int l1gprs_handle_ul_tbf_cfg_req(struct l1gprs_state *gprs, const struct msgb *msg);
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int l1gprs_handle_dl_tbf_cfg_req(struct l1gprs_state *gprs, const struct msgb *msg);
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struct l1gprs_prim_block_hdr {
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uint32_t fn;
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uint8_t tn;
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};
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struct l1gprs_prim_ul_block_req {
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struct l1gprs_prim_block_hdr hdr;
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size_t data_len;
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const uint8_t *data;
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};
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struct l1gprs_prim_dl_block_ind {
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struct l1gprs_prim_block_hdr hdr;
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struct {
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uint16_t ber10k;
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int16_t ci_cb;
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uint8_t rx_lev;
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} meas;
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size_t data_len;
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const uint8_t *data;
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};
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int l1gprs_handle_ul_block_req(struct l1gprs_state *gprs,
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struct l1gprs_prim_ul_block_req *req,
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const struct msgb *msg);
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struct msgb *l1gprs_handle_dl_block_ind(struct l1gprs_state *gprs,
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const struct l1gprs_prim_dl_block_ind *ind);
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@ -0,0 +1 @@
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../../../../../../include/l1gprs.h
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@ -0,0 +1 @@
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../../../shared/l1gprs.c
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@ -0,0 +1 @@
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../../../../../../include/l1gprs.h
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@ -0,0 +1 @@
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../../../shared/l1gprs.c
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@ -0,0 +1,106 @@
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/*
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* (C) 2023 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
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* Author: Vadim Yanitskiy <vyanitskiy@sysmocom.de>
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*
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <stdint.h>
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#include <osmocom/core/msgb.h>
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#include <osmocom/core/utils.h>
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#include <osmocom/gsm/gsm_utils.h>
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#include <osmocom/gsm/protocol/gsm_08_58.h>
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#include <osmocom/bb/virtphy/l1ctl_sap.h>
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#include <osmocom/bb/virtphy/virt_l1_sched.h>
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#include <osmocom/bb/virtphy/gsmtapl1_if.h>
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#include <osmocom/bb/virtphy/logging.h>
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#include <osmocom/bb/l1ctl_proto.h>
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#include <osmocom/bb/l1gprs.h>
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void l1ctl_rx_gprs_uldl_tbf_cfg_req(struct l1_model_ms *ms, struct msgb *msg)
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{
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const struct l1ctl_hdr *l1h = (struct l1ctl_hdr *)msg->data;
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if (OSMO_UNLIKELY(ms->gprs == NULL)) {
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LOGPMS(DL1C, LOGL_ERROR, ms, "l1gprs is not initialized\n");
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return;
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}
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msg->l1h = msgb_pull(msg, sizeof(*l1h));
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if (l1h->msg_type == L1CTL_GPRS_UL_TBF_CFG_REQ)
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l1gprs_handle_ul_tbf_cfg_req(ms->gprs, msg);
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else
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l1gprs_handle_dl_tbf_cfg_req(ms->gprs, msg);
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}
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void l1ctl_rx_gprs_ul_block_req(struct l1_model_ms *ms, struct msgb *msg)
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{
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const struct l1ctl_hdr *l1h = (struct l1ctl_hdr *)msg->data;
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struct l1gprs_prim_ul_block_req req;
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uint32_t fn_sched;
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if (OSMO_UNLIKELY(ms->gprs == NULL)) {
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LOGPMS(DL1P, LOGL_ERROR, ms, "l1gprs is not initialized\n");
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return;
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}
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msg->l1h = (void *)l1h->data;
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if (l1gprs_handle_ul_block_req(ms->gprs, &req, msg) != 0)
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return;
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msg->l2h = (void *)&req.data[0];
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fn_sched = sched_fn_ul(ms->state.current_time,
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RSL_CHAN_OSMO_PDCH | req.hdr.tn, 0x00);
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if (OSMO_UNLIKELY(fn_sched != req.hdr.fn)) {
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LOGPMS(DL1P, LOGL_ERROR, ms,
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"GPRS UL BLOCK.req: fn_sched(%u) != fn_req(%u)\n",
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fn_sched, req.hdr.fn);
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/* FIXME: return; */
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}
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virt_l1_sched_schedule(ms, msg, fn_sched, req.hdr.tn,
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&gsmtapl1_tx_to_virt_um_inst);
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}
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void l1ctl_tx_gprs_dl_block_ind(struct l1_model_ms *ms, const struct msgb *msg,
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uint32_t fn, uint8_t tn, uint8_t rxlev)
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{
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struct l1gprs_prim_dl_block_ind ind;
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struct msgb *nmsg;
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if (ms->gprs == NULL)
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return;
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ind = (struct l1gprs_prim_dl_block_ind) {
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.hdr = {
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.fn = fn,
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.tn = tn,
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},
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.meas = {
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.ber10k = 0, /* perfect Um, no errors */
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.ci_cb = 180, /* 18 dB */
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.rx_lev = rxlev,
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},
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.data = msgb_data(msg),
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.data_len = msgb_length(msg),
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};
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nmsg = l1gprs_handle_dl_block_ind(ms->gprs, &ind);
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if (nmsg != NULL)
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l1ctl_sap_tx_to_l23_inst(ms, nmsg);
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}
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@ -0,0 +1,457 @@
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/*
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* l1gprs - GPRS layer 1 implementation
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*
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* (C) 2022-2023 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
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* Author: Vadim Yanitskiy <vyanitskiy@sysmocom.de>
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*
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <errno.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <arpa/inet.h>
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#include <osmocom/core/logging.h>
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#include <osmocom/core/talloc.h>
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#include <osmocom/core/utils.h>
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#include <osmocom/core/msgb.h>
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#include <osmocom/gsm/protocol/gsm_04_08.h>
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#include <osmocom/gsm/protocol/gsm_44_060.h>
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#include <osmocom/bb/l1ctl_proto.h>
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#include <osmocom/bb/l1gprs.h>
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#define LOGP_GPRS(gprs, level, fmt, args...) \
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LOGP(l1gprs_log_cat, level, "%s" fmt, \
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(gprs)->log_prefix, ## args)
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#define LOGP_PDCH(pdch, level, fmt, args...) \
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LOGP_GPRS((pdch)->gprs, level, "(PDCH-%u) " fmt, \
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(pdch)->tn, ## args)
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#define LOG_TBF_FMT "%cL-TBF#%03d"
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#define LOG_TBF_ARGS(tbf) \
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(tbf)->uplink ? 'U' : 'D', tbf->tbf_ref
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static int l1gprs_log_cat = DLGLOBAL;
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enum gprs_rlcmac_block_type {
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GPRS_RLCMAC_DATA_BLOCK = 0x00,
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GPRS_RLCMAC_CONTROL_BLOCK = 0x01,
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GPRS_RLCMAC_CONTROL_BLOCK_OPT = 0x02,
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GPRS_RLCMAC_RESERVED = 0x03,
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};
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static struct l1gprs_tbf *l1gprs_tbf_alloc(struct l1gprs_state *gprs,
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bool uplink, uint8_t tbf_ref,
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uint8_t slotmask)
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{
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struct l1gprs_tbf *tbf;
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tbf = talloc(gprs, struct l1gprs_tbf);
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OSMO_ASSERT(tbf != NULL);
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tbf->uplink = uplink;
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tbf->tbf_ref = tbf_ref;
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tbf->slotmask = slotmask;
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return tbf;
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}
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static void l1gprs_tbf_free(struct l1gprs_tbf *tbf)
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{
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if (tbf == NULL)
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return;
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llist_del(&tbf->list);
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talloc_free(tbf);
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}
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static struct l1gprs_tbf *l1gprs_find_tbf(struct l1gprs_state *gprs,
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bool uplink, uint8_t tbf_ref)
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{
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struct l1gprs_tbf *tbf;
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llist_for_each_entry(tbf, &gprs->tbf_list, list) {
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if (tbf->uplink != uplink)
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continue;
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if (tbf->tbf_ref != tbf_ref)
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continue;
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return tbf;
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}
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return NULL;
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}
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static void l1gprs_register_tbf(struct l1gprs_state *gprs,
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struct l1gprs_tbf *tbf)
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{
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OSMO_ASSERT(tbf->slotmask != 0x00);
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/* Update the PDCH states */
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for (unsigned int tn = 0; tn < ARRAY_SIZE(gprs->pdch); tn++) {
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struct l1gprs_pdch *pdch = &gprs->pdch[tn];
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if (~tbf->slotmask & (1 << pdch->tn))
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continue;
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if (tbf->uplink) {
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pdch->ul_tbf_count++;
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} else {
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pdch->dl_tbf_count++;
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pdch->dl_tfi_mask |= (1 << tbf->dl_tfi);
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}
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LOGP_PDCH(pdch, LOGL_DEBUG,
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"Linked " LOG_TBF_FMT "\n",
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LOG_TBF_ARGS(tbf));
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}
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llist_add_tail(&tbf->list, &gprs->tbf_list);
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LOGP_GPRS(gprs, LOGL_INFO,
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LOG_TBF_FMT " is registered\n",
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LOG_TBF_ARGS(tbf));
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}
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static void l1gprs_unregister_tbf(struct l1gprs_state *gprs,
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bool uplink, uint8_t tbf_ref)
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{
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struct l1gprs_tbf *tbf;
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tbf = l1gprs_find_tbf(gprs, uplink, tbf_ref);
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if (tbf == NULL) {
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LOGP_GPRS(gprs, LOGL_ERROR,
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"%s(): " LOG_TBF_FMT " not found\n",
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__func__, LOG_TBF_ARGS(tbf));
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return;
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}
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/* Update the PDCH states */
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for (unsigned int tn = 0; tn < ARRAY_SIZE(gprs->pdch); tn++) {
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struct l1gprs_pdch *pdch = &gprs->pdch[tn];
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if (~tbf->slotmask & (1 << pdch->tn))
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continue;
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if (tbf->uplink) {
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OSMO_ASSERT(pdch->ul_tbf_count > 0);
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pdch->ul_tbf_count--;
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} else {
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OSMO_ASSERT(pdch->dl_tbf_count > 0);
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pdch->dl_tbf_count--;
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pdch->dl_tfi_mask &= ~(1 << tbf->dl_tfi);
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}
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LOGP_PDCH(pdch, LOGL_DEBUG,
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"Unlinked " LOG_TBF_FMT "\n",
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LOG_TBF_ARGS(tbf));
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}
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LOGP_GPRS(gprs, LOGL_INFO,
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LOG_TBF_FMT " is unregistered and free()d\n",
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LOG_TBF_ARGS(tbf));
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l1gprs_tbf_free(tbf);
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}
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#define L1GPRS_L1CTL_MSGB_SIZE 256
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#define L1GPRS_L1CTL_MSGB_HEADROOM 32
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static struct msgb *l1gprs_l1ctl_msgb_alloc(uint8_t msg_type)
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{
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struct l1ctl_hdr *l1h;
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struct msgb *msg;
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msg = msgb_alloc_headroom(L1GPRS_L1CTL_MSGB_SIZE,
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L1GPRS_L1CTL_MSGB_HEADROOM,
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"l1gprs_l1ctl_msg");
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if (msg == NULL)
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return NULL;
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msg->l1h = msgb_put(msg, sizeof(*l1h));
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l1h = (struct l1ctl_hdr *)msg->l1h;
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l1h->msg_type = msg_type;
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return msg;
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}
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static bool l1gprs_pdch_filter_dl_block(const struct l1gprs_pdch *pdch,
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const uint8_t *data)
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{
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enum gprs_rlcmac_block_type block_type = data[0] >> 6;
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uint8_t dl_tfi;
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switch (block_type) {
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case GPRS_RLCMAC_DATA_BLOCK:
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/* see 3GPP TS 44.060, section 10.2.1 */
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dl_tfi = (data[1] >> 1) & 0x1f;
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break;
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case GPRS_RLCMAC_CONTROL_BLOCK_OPT:
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/* see 3GPP TS 44.060, section 10.3.1 */
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dl_tfi = (data[2] >> 1) & 0x1f;
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break;
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case GPRS_RLCMAC_CONTROL_BLOCK:
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/* no optional octets */
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return true;
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default:
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LOGP_PDCH(pdch, LOGL_NOTICE,
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"Rx Downlink block with unknown payload (0x%0x)\n",
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block_type);
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return false;
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}
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if (pdch->dl_tfi_mask & (1 << dl_tfi))
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