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65 lines
1.7 KiB
65 lines
1.7 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (C) ST-Ericsson AB 2010 |
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* Author: Sjur Brendeland |
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*/ |
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#define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__ |
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#include <linux/kernel.h> |
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#include <linux/types.h> |
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#include <linux/slab.h> |
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#include <linux/errno.h> |
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#include <net/caif/caif_layer.h> |
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#include <net/caif/cfsrvl.h> |
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#include <net/caif/cfpkt.h> |
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#define container_obj(layr) ((struct cfsrvl *) layr) |
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static int cfvidl_receive(struct cflayer *layr, struct cfpkt *pkt); |
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static int cfvidl_transmit(struct cflayer *layr, struct cfpkt *pkt); |
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struct cflayer *cfvidl_create(u8 channel_id, struct dev_info *dev_info) |
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{ |
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struct cfsrvl *vid = kzalloc(sizeof(struct cfsrvl), GFP_ATOMIC); |
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if (!vid) |
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return NULL; |
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caif_assert(offsetof(struct cfsrvl, layer) == 0); |
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cfsrvl_init(vid, channel_id, dev_info, false); |
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vid->layer.receive = cfvidl_receive; |
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vid->layer.transmit = cfvidl_transmit; |
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snprintf(vid->layer.name, CAIF_LAYER_NAME_SZ, "vid1"); |
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return &vid->layer; |
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} |
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static int cfvidl_receive(struct cflayer *layr, struct cfpkt *pkt) |
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{ |
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u32 videoheader; |
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if (cfpkt_extr_head(pkt, &videoheader, 4) < 0) { |
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pr_err("Packet is erroneous!\n"); |
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cfpkt_destroy(pkt); |
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return -EPROTO; |
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} |
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return layr->up->receive(layr->up, pkt); |
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} |
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static int cfvidl_transmit(struct cflayer *layr, struct cfpkt *pkt) |
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{ |
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struct cfsrvl *service = container_obj(layr); |
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struct caif_payload_info *info; |
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u32 videoheader = 0; |
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int ret; |
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if (!cfsrvl_ready(service, &ret)) { |
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cfpkt_destroy(pkt); |
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return ret; |
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} |
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cfpkt_add_head(pkt, &videoheader, 4); |
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/* Add info for MUX-layer to route the packet out */ |
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info = cfpkt_info(pkt); |
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info->channel_id = service->layer.id; |
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info->dev_info = &service->dev_info; |
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return layr->dn->transmit(layr->dn, pkt); |
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}
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