LXR linux/net/caif/cfdbgl.c

   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
  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 = 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
  33static int cfdbgl_receive(struct cflayer *layr, struct cfpkt *pkt)
  34{
  35        return layr->up->receive(layr->up, pkt);
  36}
  37
  38static 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