LXR linux/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
  17static int cfdbgl_receive(struct cflayer *layr, struct cfpkt *pkt);
  18static int cfdbgl_transmit(struct cflayer *layr, struct cfpkt *pkt);
  19
  20struct 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
  36static int cfdbgl_receive(struct cflayer *layr, struct cfpkt *pkt)
  37{
  38        return layr->up->receive(layr->up, pkt);
  39}
  40
  41static 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