mobile: Begin with a primitive interface on top of the code

We want the script interface to interface through a primitive
interface. This will allow to move it to a different thread or
a process in the future. The script interface will just use the
primitives.

It is not clear how "sap" will be used here. I am keeping it
at 0 right now. The first primitive is starting a timer with a
request and then getting an indication as a response.

Change-Id: Id2456b7fae35546553c4805f12a40c0812d9255c

3 files changed, 50 insertions, 1 deletions

diff --git a/src/host/layer23/include/osmocom/bb/common/logging.h b/src/host/layer23/include/osmocom/bb/common/logging.h
index efe493d0..fb1229ef 100644
--- a/src/host/layer23/include/osmocom/bb/common/logging.h
+++ b/src/host/layer23/include/osmocom/bb/common/logging.h
@@ -23,6 +23,7 @@ enum {
 	DSIM,
 	DGPS,
 	DMOB,
+	DPRIM,
 };
 
 extern const struct log_info log_info;
diff --git a/src/host/layer23/include/osmocom/bb/mobile/Makefile.am b/src/host/layer23/include/osmocom/bb/mobile/Makefile.am
index b58b9529..12cf24b0 100644
--- a/src/host/layer23/include/osmocom/bb/mobile/Makefile.am
+++ b/src/host/layer23/include/osmocom/bb/mobile/Makefile.am
@@ -1,3 +1,3 @@
 noinst_HEADERS = gsm322.h gsm480_ss.h gsm411_sms.h gsm48_cc.h gsm48_mm.h \
 		 gsm48_rr.h mncc.h settings.h subscriber.h support.h \
-		 transaction.h vty.h mncc_sock.h
+		 transaction.h vty.h mncc_sock.h primitives.h
diff --git a/src/host/layer23/include/osmocom/bb/mobile/primitives.h b/src/host/layer23/include/osmocom/bb/mobile/primitives.h
new file mode 100644
index 00000000..a3168b2e
--- /dev/null
+++ b/src/host/layer23/include/osmocom/bb/mobile/primitives.h
@@ -0,0 +1,48 @@
+#pragma once
+
+#include <osmocom/core/prim.h>
+
+struct mobile_prim;
+
+/**
+ * Mobile Script<->App primitives. Application script will receive
+ * indications and will send primitives to the lower layers. Here
+ * we will convert from internal state/events to the primitives. In
+ * the future the indications might be generated at lower levels
+ * directly.
+ */
+enum mobile_prims {
+	PRIM_MOB_TIMER,
+	PRIM_MOB_TIMER_CANCEL,
+};
+
+struct mobile_prim_intf {
+	struct osmocom_ms *ms;
+	void (*indication)(struct mobile_prim_intf *, struct mobile_prim *prim);
+
+	/* Internal state */
+	struct llist_head timers;
+};
+
+/**
+ * Primitive to create timers and get indication once they have
+ * expired. Currently there is no way to cancel timers.
+ */
+struct mobile_timer_param {
+	uint64_t timer_id;	  	/*!< Unique Id identifying the timer */
+	int seconds;			/*!< Seconds the timer should fire in */
+};
+
+struct mobile_prim {
+	struct osmo_prim_hdr hdr;	/*!< Primitive base class */
+	union {
+		struct mobile_timer_param timer;
+	} u;
+};
+
+
+struct mobile_prim_intf *mobile_prim_intf_alloc(struct osmocom_ms *ms);
+int mobile_prim_intf_req(struct mobile_prim_intf *intf, struct mobile_prim *hdr);
+void mobile_prim_intf_free(struct mobile_prim_intf *intf);
+
+struct mobile_prim *mobile_prim_alloc(unsigned int primitive, enum osmo_prim_operation op);