tbf: Move existing tbf_state implementation to osmo_fsm
This is only an initial implementation, where all state changes are
still done outside the FSM itself.
The idea is to do the move in several commits so that they can be
digested better in logical steps and avoid major break up.
Related: OS#2709
Change-Id: I6bb4baea2dee191ba5bbcbec2ea9dcf681aa1237
diff --git a/src/tbf_fsm.h b/src/tbf_fsm.h
new file mode 100644
index 0000000..84bb437
--- /dev/null
+++ b/src/tbf_fsm.h
@@ -0,0 +1,57 @@
+/* tbf_fsm.h
+ *
+ * Copyright (C) 2021 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
+ * Author: Pau Espin Pedrol <pespin@sysmocom.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+#pragma once
+
+#include <osmocom/core/fsm.h>
+#include <osmocom/core/tdef.h>
+
+#include <gprs_pcu.h>
+
+struct gprs_rlcmac_tbf;
+
+enum tbf_fsm_event {
+ TBF_EV_FOOBAR,
+};
+
+enum tbf_fsm_states {
+ TBF_ST_NULL = 0, /* new created TBF */
+ TBF_ST_ASSIGN, /* wait for downlink assignment */
+ TBF_ST_FLOW, /* RLC/MAC flow, resource needed */
+ TBF_ST_FINISHED, /* flow finished, wait for release */
+ TBF_ST_WAIT_RELEASE,/* wait for release or restart of DL TBF */
+ TBF_ST_RELEASING, /* releasing, wait to free TBI/USF */
+};
+
+struct tbf_fsm_ctx {
+ struct osmo_fsm_inst *fi;
+ struct gprs_rlcmac_tbf* tbf; /* back pointer */
+};
+
+extern const struct osmo_tdef_state_timeout tbf_fsm_timeouts[32];
+/* Transition to a state, using the T timer defined in assignment_fsm_timeouts.
+ * The actual timeout value is in turn obtained from conn->T_defs.
+ * Assumes local variable fi exists. */
+#define tbf_fsm_state_chg(fi, NEXT_STATE) \
+ osmo_tdef_fsm_inst_state_chg(fi, NEXT_STATE, \
+ tbf_fsm_timeouts, \
+ the_pcu->T_defs, \
+ -1)
+
+extern struct osmo_fsm tbf_fsm;