git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| b482cd20 SB |
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 | #include <linux/kernel.h> | |
| 8 | #include <linux/types.h> | |
| 9 | #include <linux/slab.h> | |
| 10 | #include <linux/errno.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 cfvidl_receive(struct cflayer *layr, struct cfpkt *pkt); | |
| 18 | static int cfvidl_transmit(struct cflayer *layr, struct cfpkt *pkt); | |
| 19 | ||
| 20 | struct cflayer *cfvidl_create(u8 channel_id, struct dev_info *dev_info) | |
| 21 | { | |
| 22 | struct cfsrvl *vid = kmalloc(sizeof(struct cfsrvl), GFP_ATOMIC); | |
| 23 | if (!vid) { | |
| 24 | pr_warning("CAIF: %s(): Out of memory\n", __func__); | |
| 25 | return NULL; | |
| 26 | } | |
| 27 | caif_assert(offsetof(struct cfsrvl, layer) == 0); | |
| 28 | ||
| 29 | memset(vid, 0, sizeof(struct cfsrvl)); | |
| b1c74247 | 30 | cfsrvl_init(vid, channel_id, dev_info, false); |
| b482cd20 SB |
31 | vid->layer.receive = cfvidl_receive; |
| 32 | vid->layer.transmit = cfvidl_transmit; | |
| 33 | snprintf(vid->layer.name, CAIF_LAYER_NAME_SZ - 1, "vid1"); | |
| 34 | return &vid->layer; | |
| 35 | } | |
| 36 | ||
| 37 | static int cfvidl_receive(struct cflayer *layr, struct cfpkt *pkt) | |
| 38 | { | |
| 39 | u32 videoheader; | |
| 40 | if (cfpkt_extr_head(pkt, &videoheader, 4) < 0) { | |
| 41 | pr_err("CAIF: %s(): Packet is erroneous!\n", __func__); | |
| 42 | cfpkt_destroy(pkt); | |
| 43 | return -EPROTO; | |
| 44 | } | |
| 45 | return layr->up->receive(layr->up, pkt); | |
| 46 | } | |
| 47 | ||
| 48 | static int cfvidl_transmit(struct cflayer *layr, struct cfpkt *pkt) | |
| 49 | { | |
| 50 | struct cfsrvl *service = container_obj(layr); | |
| 51 | struct caif_payload_info *info; | |
| 52 | u32 videoheader = 0; | |
| 53 | int ret; | |
| 54 | if (!cfsrvl_ready(service, &ret)) | |
| 55 | return ret; | |
| 56 | cfpkt_add_head(pkt, &videoheader, 4); | |
| 57 | /* Add info for MUX-layer to route the packet out */ | |
| 58 | info = cfpkt_info(pkt); | |
| 59 | info->channel_id = service->layer.id; | |
| 60 | info->dev_info = &service->dev_info; | |
| 61 | ret = layr->dn->transmit(layr->dn, pkt); | |
| 62 | if (ret < 0) | |
| 63 | cfpkt_extr_head(pkt, &videoheader, 4); | |
| 64 | return ret; | |
| 65 | } |