1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) ST-Ericsson AB 2010
4 * Author: Sjur Brendeland
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
17 static int cfdbgl_receive(struct cflayer *layr, struct cfpkt *pkt);
18 static int cfdbgl_transmit(struct cflayer *layr, struct cfpkt *pkt);
19
20 struct 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, "dbg%d", channel_id);
30 return &dbg->layer;
31 }
32
33 static int cfdbgl_receive(struct cflayer *layr, struct cfpkt *pkt)
34 {
35 return layr->up->receive(layr->up, pkt);
36 }
37
38 static 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
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