1/*
2 * Copyright (C) ST-Ericsson AB 2010
3 * Author:	Sjur Brendeland
4 * License terms: GNU General Public License (GPL) version 2
5 */
6
7#define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__
8
9#include <linux/stddef.h>
10#include <linux/slab.h>
11#include <net/caif/caif_layer.h>
12#include <net/caif/cfsrvl.h>
13#include <net/caif/cfpkt.h>
14
15#define container_obj(layr) ((struct cfsrvl *) layr)
16
17static int cfdbgl_receive(struct cflayer *layr, struct cfpkt *pkt);
18static int cfdbgl_transmit(struct cflayer *layr, struct cfpkt *pkt);
19
20struct cflayer *cfdbgl_create(u8 channel_id, struct dev_info *dev_info)
21{
22	struct cfsrvl *dbg = kzalloc(sizeof(struct cfsrvl), GFP_ATOMIC);
23	if (!dbg)
24		return NULL;
25	caif_assert(offsetof(struct cfsrvl, layer) == 0);
26	cfsrvl_init(dbg, channel_id, dev_info, false);
27	dbg->layer.receive = cfdbgl_receive;
28	dbg->layer.transmit = cfdbgl_transmit;
29	snprintf(dbg->layer.name, CAIF_LAYER_NAME_SZ - 1, "dbg%d", channel_id);
30	return &dbg->layer;
31}
32
33static int cfdbgl_receive(struct cflayer *layr, struct cfpkt *pkt)
34{
35	return layr->up->receive(layr->up, pkt);
36}
37
38static int cfdbgl_transmit(struct cflayer *layr, struct cfpkt *pkt)
39{
40	struct cfsrvl *service = container_obj(layr);
41	struct caif_payload_info *info;
42	int ret;
43
44	if (!cfsrvl_ready(service, &ret)) {
45		cfpkt_destroy(pkt);
46		return ret;
47	}
48
49	/* Add info for MUX-layer to route the packet out */
50	info = cfpkt_info(pkt);
51	info->channel_id = service->layer.id;
52	info->dev_info = &service->dev_info;
53
54	return layr->dn->transmit(layr->dn, pkt);
55}
56