1*af873fceSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
2b482cd20SSjur Braendeland /*
3b482cd20SSjur Braendeland * Copyright (C) ST-Ericsson AB 2010
426ee65e6Ssjur.brandeland@stericsson.com * Author: Sjur Brendeland
5b482cd20SSjur Braendeland */
6b482cd20SSjur Braendeland
7b31fa5baSJoe Perches #define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__
8b31fa5baSJoe Perches
9b482cd20SSjur Braendeland #include <linux/kernel.h>
10b482cd20SSjur Braendeland #include <linux/types.h>
11b482cd20SSjur Braendeland #include <linux/slab.h>
12b482cd20SSjur Braendeland #include <linux/errno.h>
13b482cd20SSjur Braendeland #include <net/caif/caif_layer.h>
14b482cd20SSjur Braendeland #include <net/caif/cfsrvl.h>
15b482cd20SSjur Braendeland #include <net/caif/cfpkt.h>
16b482cd20SSjur Braendeland
17b482cd20SSjur Braendeland #define container_obj(layr) ((struct cfsrvl *) layr)
18b482cd20SSjur Braendeland
19b482cd20SSjur Braendeland static int cfvidl_receive(struct cflayer *layr, struct cfpkt *pkt);
20b482cd20SSjur Braendeland static int cfvidl_transmit(struct cflayer *layr, struct cfpkt *pkt);
21b482cd20SSjur Braendeland
cfvidl_create(u8 channel_id,struct dev_info * dev_info)22b482cd20SSjur Braendeland struct cflayer *cfvidl_create(u8 channel_id, struct dev_info *dev_info)
23b482cd20SSjur Braendeland {
247ac2ed0cSJoe Perches struct cfsrvl *vid = kzalloc(sizeof(struct cfsrvl), GFP_ATOMIC);
257ac2ed0cSJoe Perches if (!vid)
26b482cd20SSjur Braendeland return NULL;
27b482cd20SSjur Braendeland caif_assert(offsetof(struct cfsrvl, layer) == 0);
28b482cd20SSjur Braendeland
29b1c74247SSjur Braendeland cfsrvl_init(vid, channel_id, dev_info, false);
30b482cd20SSjur Braendeland vid->layer.receive = cfvidl_receive;
31b482cd20SSjur Braendeland vid->layer.transmit = cfvidl_transmit;
3234dcf6a1Sswkhack snprintf(vid->layer.name, CAIF_LAYER_NAME_SZ, "vid1");
33b482cd20SSjur Braendeland return &vid->layer;
34b482cd20SSjur Braendeland }
35b482cd20SSjur Braendeland
cfvidl_receive(struct cflayer * layr,struct cfpkt * pkt)36b482cd20SSjur Braendeland static int cfvidl_receive(struct cflayer *layr, struct cfpkt *pkt)
37b482cd20SSjur Braendeland {
38b482cd20SSjur Braendeland u32 videoheader;
39b482cd20SSjur Braendeland if (cfpkt_extr_head(pkt, &videoheader, 4) < 0) {
40b31fa5baSJoe Perches pr_err("Packet is erroneous!\n");
41b482cd20SSjur Braendeland cfpkt_destroy(pkt);
42b482cd20SSjur Braendeland return -EPROTO;
43b482cd20SSjur Braendeland }
44b482cd20SSjur Braendeland return layr->up->receive(layr->up, pkt);
45b482cd20SSjur Braendeland }
46b482cd20SSjur Braendeland
cfvidl_transmit(struct cflayer * layr,struct cfpkt * pkt)47b482cd20SSjur Braendeland static int cfvidl_transmit(struct cflayer *layr, struct cfpkt *pkt)
48b482cd20SSjur Braendeland {
49b482cd20SSjur Braendeland struct cfsrvl *service = container_obj(layr);
50b482cd20SSjur Braendeland struct caif_payload_info *info;
51b482cd20SSjur Braendeland u32 videoheader = 0;
52b482cd20SSjur Braendeland int ret;
53374458b3SDmitry Tarnyagin
54374458b3SDmitry Tarnyagin if (!cfsrvl_ready(service, &ret)) {
55374458b3SDmitry Tarnyagin cfpkt_destroy(pkt);
56b482cd20SSjur Braendeland return ret;
57374458b3SDmitry Tarnyagin }
58374458b3SDmitry Tarnyagin
59b482cd20SSjur Braendeland cfpkt_add_head(pkt, &videoheader, 4);
60b482cd20SSjur Braendeland /* Add info for MUX-layer to route the packet out */
61b482cd20SSjur Braendeland info = cfpkt_info(pkt);
62b482cd20SSjur Braendeland info->channel_id = service->layer.id;
63b482cd20SSjur Braendeland info->dev_info = &service->dev_info;
644dd820c0SSjur Brændeland return layr->dn->transmit(layr->dn, pkt);
65b482cd20SSjur Braendeland }
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