net/caif/cfdbgl.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * Copyright (C) ST-Ericsson AB 2010
0004  * Author:  Sjur Brendeland
0005  */
0006
0007 #define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__
0008
0009 #include <linux/stddef.h>
0010 #include <linux/slab.h>
0011 #include <net/caif/caif_layer.h>
0012 #include <net/caif/cfsrvl.h>
0013 #include <net/caif/cfpkt.h>
0014
0015 #define container_obj(layr) ((struct cfsrvl *) layr)
0016
0017 static int cfdbgl_receive(struct cflayer *layr, struct cfpkt *pkt);
0018 static int cfdbgl_transmit(struct cflayer *layr, struct cfpkt *pkt);
0019
0020 struct cflayer *cfdbgl_create(u8 channel_id, struct dev_info *dev_info)
0021 {
0022     struct cfsrvl *dbg = kzalloc(sizeof(struct cfsrvl), GFP_ATOMIC);
0023     if (!dbg)
0024         return NULL;
0025     caif_assert(offsetof(struct cfsrvl, layer) == 0);
0026     cfsrvl_init(dbg, channel_id, dev_info, false);
0027     dbg->layer.receive = cfdbgl_receive;
0028     dbg->layer.transmit = cfdbgl_transmit;
0029     snprintf(dbg->layer.name, CAIF_LAYER_NAME_SZ, "dbg%d", channel_id);
0030     return &dbg->layer;
0031 }
0032
0033 static int cfdbgl_receive(struct cflayer *layr, struct cfpkt *pkt)
0034 {
0035     return layr->up->receive(layr->up, pkt);
0036 }
0037
0038 static int cfdbgl_transmit(struct cflayer *layr, struct cfpkt *pkt)
0039 {
0040     struct cfsrvl *service = container_obj(layr);
0041     struct caif_payload_info *info;
0042     int ret;
0043
0044     if (!cfsrvl_ready(service, &ret)) {
0045         cfpkt_destroy(pkt);
0046         return ret;
0047     }
0048
0049     /* Add info for MUX-layer to route the packet out */
0050     info = cfpkt_info(pkt);
0051     info->channel_id = service->layer.id;
0052     info->dev_info = &service->dev_info;
0053
0054     return layr->dn->transmit(layr->dn, pkt);
0055 }