net/caif/cfdbgl.c

   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 }