1 /* 2 * Copyright (C) ST-Ericsson AB 2010 3 * Author: Sjur Brendeland/sjur.brandeland@stericsson.com 4 * License terms: GNU General Public License (GPL) version 2 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 = kmalloc(sizeof(struct cfsrvl), GFP_ATOMIC); 23 if (!dbg) { 24 pr_warn("Out of memory\n"); 25 return NULL; 26 } 27 caif_assert(offsetof(struct cfsrvl, layer) == 0); 28 memset(dbg, 0, sizeof(struct cfsrvl)); 29 cfsrvl_init(dbg, channel_id, dev_info, false); 30 dbg->layer.receive = cfdbgl_receive; 31 dbg->layer.transmit = cfdbgl_transmit; 32 snprintf(dbg->layer.name, CAIF_LAYER_NAME_SZ - 1, "dbg%d", channel_id); 33 return &dbg->layer; 34 } 35 36 static int cfdbgl_receive(struct cflayer *layr, struct cfpkt *pkt) 37 { 38 return layr->up->receive(layr->up, pkt); 39 } 40 41 static int cfdbgl_transmit(struct cflayer *layr, struct cfpkt *pkt) 42 { 43 struct cfsrvl *service = container_obj(layr); 44 struct caif_payload_info *info; 45 int ret; 46 47 if (!cfsrvl_ready(service, &ret)) 48 return ret; 49 50 /* Add info for MUX-layer to route the packet out */ 51 info = cfpkt_info(pkt); 52 info->channel_id = service->layer.id; 53 info->dev_info = &service->dev_info; 54 55 return layr->dn->transmit(layr->dn, pkt); 56 } 57