From c57333e1581131a794a5dd1c1d30f97e73120dfe Mon Sep 17 00:00:00 2001
From: Harald Welte <laforge@osmocom.org>
Date: Mon, 21 Dec 2020 13:14:54 +0100
Subject: Add a bts_model->bts_init() and trx_init() call-back function

This allows a given BTS model driver to initialize data structures
specific cor this BTS instance (or a TRX for this BTS instance).

Change-Id: Icbad9cdc12221c9ad997267d77e5414edcbac538
---
 include/osmocom/bsc/bts.h |  8 ++++++++
 src/osmo-bsc/bts.c        | 13 +++++++++++++
 src/osmo-bsc/bts_trx.c    |  7 +++++++
 3 files changed, 28 insertions(+)

diff --git a/include/osmocom/bsc/bts.h b/include/osmocom/bsc/bts.h
index 7d070af2e..aef0e0384 100644
--- a/include/osmocom/bsc/bts.h
+++ b/include/osmocom/bsc/bts.h
@@ -178,7 +178,15 @@ struct gsm_bts_model {
 	const char *name;
 
 	bool started;
+	/* start the model itself */
 	int (*start)(struct gsm_network *net);
+
+	/* initialize a single BTS for this model */
+	int (*bts_init)(struct gsm_bts *bts);
+
+	/* initialize a single TRX for this model */
+	int (*trx_init)(struct gsm_bts_trx *trx);
+
 	int (*oml_rcvmsg)(struct msgb *msg);
 	char * (*oml_status)(const struct gsm_bts *bts);
 
diff --git a/src/osmo-bsc/bts.c b/src/osmo-bsc/bts.c
index 747e8b7cc..39122ae03 100644
--- a/src/osmo-bsc/bts.c
+++ b/src/osmo-bsc/bts.c
@@ -503,6 +503,19 @@ int gsm_set_bts_type(struct gsm_bts *bts, enum gsm_bts_type type)
 		model->started = true;
 	}
 
+	if (model->bts_init) {
+		int rc = model->bts_init(bts);
+		if (rc < 0)
+			return rc;
+	}
+
+	/* handle those TRX which are already allocated at the time we set the type */
+	if (model->trx_init) {
+		struct gsm_bts_trx *trx;
+		llist_for_each_entry(trx, &bts->trx_list, list)
+			model->trx_init(trx);
+	}
+
 	switch (bts->type) {
 	case GSM_BTS_TYPE_OSMOBTS:
 		/* Enable dynamic Uplink power control by default */
diff --git a/src/osmo-bsc/bts_trx.c b/src/osmo-bsc/bts_trx.c
index 0e5223874..6d98929b5 100644
--- a/src/osmo-bsc/bts_trx.c
+++ b/src/osmo-bsc/bts_trx.c
@@ -120,6 +120,13 @@ struct gsm_bts_trx *gsm_bts_trx_alloc(struct gsm_bts *bts)
 	if (trx->nr != 0)
 		trx->nominal_power = bts->c0->nominal_power;
 
+	if (bts->model && bts->model->trx_init) {
+		if (bts->model->trx_init(trx) < 0) {
+			talloc_free(trx);
+			return NULL;
+		}
+	}
+
 	llist_add_tail(&trx->list, &bts->trx_list);
 
 	return trx;
-- 
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