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Linux/net/caif/cfdbgl.c

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  1 /*
  2  * Copyright (C) ST-Ericsson AB 2010
  3  * Author:      Sjur Brendeland
  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 = 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 - 1, "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 

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