mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-26 06:20:54 +07:00
b482cd2053
CAIF generic protocol implementation. This layer is somewhat generic in order to be able to use and test it outside the Linux Kernel. cfctrl.c - CAIF control protocol layer cfdbgl.c - CAIF debug protocol layer cfdgml.c - CAIF datagram protocol layer cffrml.c - CAIF framing protocol layer cfmuxl.c - CAIF mux protocol layer cfrfml.c - CAIF remote file manager protocol layer cfserl.c - CAIF serial (fragmentation) protocol layer cfsrvl.c - CAIF generic service layer functions cfutill.c - CAIF utility protocol layer cfveil.c - CAIF AT protocol layer cfvidl.c - CAIF video protocol layer Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
/*
|
|
* Copyright (C) ST-Ericsson AB 2010
|
|
* Author: Sjur Brendeland/sjur.brandeland@stericsson.com
|
|
* License terms: GNU General Public License (GPL) version 2
|
|
*/
|
|
|
|
#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_warning("CAIF: %s(): Out of memory\n", __func__);
|
|
return NULL;
|
|
}
|
|
caif_assert(offsetof(struct cfsrvl, layer) == 0);
|
|
|
|
memset(vid, 0, sizeof(struct cfsrvl));
|
|
cfsrvl_init(vid, channel_id, dev_info);
|
|
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("CAIF: %s(): Packet is erroneous!\n", __func__);
|
|
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;
|
|
}
|