/* * Copyright (C) ST-Ericsson AB 2010 * Author: Sjur Brendeland/sjur.brandeland@stericsson.com * License terms: GNU General Public License (GPL) version 2 */ #define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__ #include <linux/kernel.h> #include <linux/types.h> #include <linux/slab.h> #include <linux/errno.h> #include <net/caif/caif_layer.h> #include <net/caif/cfsrvl.h> #include <net/caif/cfpkt.h> #define container_obj(layr) ((struct cfsrvl *) layr) static int cfvidl_receive(struct cflayer *layr, struct cfpkt *pkt); static int cfvidl_transmit(struct cflayer *layr, struct cfpkt *pkt); struct cflayer *cfvidl_create(u8 channel_id, struct dev_info *dev_info) { struct cfsrvl *vid = kmalloc(sizeof(struct cfsrvl), GFP_ATOMIC); if (!vid) { pr_warn("Out of memory\n"); return NULL; } caif_assert(offsetof(struct cfsrvl, layer) == 0); memset(vid, 0, sizeof(struct cfsrvl)); cfsrvl_init(vid, channel_id, dev_info, false); vid->layer.receive = cfvidl_receive; vid->layer.transmit = cfvidl_transmit; snprintf(vid->layer.name, CAIF_LAYER_NAME_SZ - 1, "vid1"); return &vid->layer; } static int cfvidl_receive(struct cflayer *layr, struct cfpkt *pkt) { u32 videoheader; if (cfpkt_extr_head(pkt, &videoheader, 4) < 0) { pr_err("Packet is erroneous!\n"); cfpkt_destroy(pkt); return -EPROTO; } return layr->up->receive(layr->up, pkt); } static int cfvidl_transmit(struct cflayer *layr, struct cfpkt *pkt) { struct cfsrvl *service = container_obj(layr); struct caif_payload_info *info; u32 videoheader = 0; int ret; if (!cfsrvl_ready(service, &ret)) return ret; cfpkt_add_head(pkt, &videoheader, 4); /* Add info for MUX-layer to route the packet out */ info = cfpkt_info(pkt); info->channel_id = service->layer.id; info->dev_info = &service->dev_info; ret = layr->dn->transmit(layr->dn, pkt); if (ret < 0) cfpkt_extr_head(pkt, &videoheader, 4); return ret; }