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(size: sizeof(struct cfsrvl), GFP_ATOMIC); |
23 | if (!dbg) |
24 | return NULL; |
25 | caif_assert(offsetof(struct cfsrvl, layer) == 0); |
26 | cfsrvl_init(service: dbg, channel_id, dev_info, supports_flowctrl: false); |
27 | dbg->layer.receive = cfdbgl_receive; |
28 | dbg->layer.transmit = cfdbgl_transmit; |
29 | snprintf(buf: dbg->layer.name, CAIF_LAYER_NAME_SZ, fmt: "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, err: &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 | |