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b1c74247b9
Flow control is not used by all CAIF services. The usage of flow control is now part of the gerneal initialization function for CAIF Services. Signed-off-by: Sjur Braendeland@stericsson.com Signed-off-by: David S. Miller <davem@davemloft.net>
66 lines
1.9 KiB
C
66 lines
1.9 KiB
C
/*
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* Copyright (C) ST-Ericsson AB 2010
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* Author: Sjur Brendeland/sjur.brandeland@stericsson.com
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* License terms: GNU General Public License (GPL) version 2
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*/
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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 = kmalloc(sizeof(struct cfsrvl), GFP_ATOMIC);
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if (!vid) {
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pr_warning("CAIF: %s(): Out of memory\n", __func__);
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return NULL;
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}
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caif_assert(offsetof(struct cfsrvl, layer) == 0);
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memset(vid, 0, sizeof(struct cfsrvl));
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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 - 1, "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("CAIF: %s(): Packet is erroneous!\n", __func__);
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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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return ret;
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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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ret = layr->dn->transmit(layr->dn, pkt);
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if (ret < 0)
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cfpkt_extr_head(pkt, &videoheader, 4);
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return ret;
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}
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