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