Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / net / caif / cfvidl.c

diff --git a/kernel/net/caif/cfvidl.c b/kernel/net/caif/cfvidl.c
new file mode 100644 (file)
index 0000000..b3b110e
--- /dev/null
+++ b/kernel/net/caif/cfvidl.c
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2010
+ * Author:     Sjur Brendeland
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__
+
+#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 = kzalloc(sizeof(struct cfsrvl), GFP_ATOMIC);
+       if (!vid)
+               return NULL;
+       caif_assert(offsetof(struct cfsrvl, layer) == 0);
+
+       cfsrvl_init(vid, channel_id, dev_info, false);
+       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("Packet is erroneous!\n");
+               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)) {
+               cfpkt_destroy(pkt);
+               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;
+       return layr->dn->transmit(layr->dn, pkt);
+}