xref: /openbmc/linux/net/caif/cfdbgl.c (revision ccc319dc)
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