caif: Use link layer MTU instead of fixed MTU

Previously CAIF supported maximum transfer size of ~4050.
The transfer size is now calculated dynamically based on the
link layers mtu size.

Signed-off-by: Sjur Braendeland@stericsson.com
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 18 insertions, 12 deletions

diff --git a/include/net/caif/caif_dev.h b/include/net/caif/caif_dev.h
index 318ab94..6da573c 100644
--- a/include/net/caif/caif_dev.h
+++ b/include/net/caif/caif_dev.h
@@ -50,6 +50,9 @@ struct caif_connect_request {
  * @client_layer:	User implementation of client layer. This layer
  *			MUST have receive and control callback functions
  *			implemented.
+ * @ifindex:		Link layer interface index used for this connection.
+ * @headroom:		Head room needed by CAIF protocol.
+ * @tailroom:		Tail room needed by CAIF protocol.
  *
  * This function connects a CAIF channel. The Client must implement
  * the struct cflayer. This layer represents the Client layer and holds
@@ -59,8 +62,9 @@ struct caif_connect_request {
  * E.g. CAIF Socket will call this function for each socket it connects
  * and have one client_layer instance for each socket.
  */
-int caif_connect_client(struct caif_connect_request *config,
-			   struct cflayer *client_layer);
+int caif_connect_client(struct caif_connect_request *conn_req,
+			struct cflayer *client_layer, int *ifindex,
+			int *headroom, int *tailroom);
 
 /**
  * caif_disconnect_client - Disconnects a client from the CAIF stack.
diff --git a/include/net/caif/caif_layer.h b/include/net/caif/caif_layer.h
index 25c472f..c8b07a9 100644
--- a/include/net/caif/caif_layer.h
+++ b/include/net/caif/caif_layer.h
@@ -15,14 +15,8 @@ struct cfpktq;
 struct caif_payload_info;
 struct caif_packet_funcs;
 
-#define CAIF_MAX_FRAMESIZE 4096
-#define CAIF_MAX_PAYLOAD_SIZE (4096 - 64)
-#define CAIF_NEEDED_HEADROOM (10)
-#define CAIF_NEEDED_TAILROOM (2)
 
 #define CAIF_LAYER_NAME_SZ 16
-#define CAIF_SUCCESS	1
-#define CAIF_FAILURE	0
 
 /**
  * caif_assert() - Assert function for CAIF.
diff --git a/include/net/caif/cfcnfg.h b/include/net/caif/cfcnfg.h
index 9fc2fc2..bd646fa 100644
--- a/include/net/caif/cfcnfg.h
+++ b/include/net/caif/cfcnfg.h
@@ -7,6 +7,7 @@
 #ifndef CFCNFG_H_
 #define CFCNFG_H_
 #include <linux/spinlock.h>
+#include <linux/netdevice.h>
 #include <net/caif/caif_layer.h>
 #include <net/caif/cfctrl.h>
 
@@ -73,8 +74,8 @@ void cfcnfg_remove(struct cfcnfg *cfg);
 
 void
 cfcnfg_add_phy_layer(struct cfcnfg *cnfg, enum cfcnfg_phy_type phy_type,
-		     void *dev, struct cflayer *phy_layer, u16 *phyid,
-		     enum cfcnfg_phy_preference pref,
+		     struct net_device *dev, struct cflayer *phy_layer,
+		     u16 *phyid, enum cfcnfg_phy_preference pref,
 		     bool fcs, bool stx);
 
 /**
@@ -114,11 +115,18 @@ void cfcnfg_release_adap_layer(struct cflayer *adap_layer);
  * @param:		Link setup parameters.
  * @adap_layer:		Specify the adaptation layer; the receive and
  *			flow-control functions MUST be set in the structure.
- *
+ * @ifindex:		Link layer interface index used for this connection.
+ * @proto_head:		Protocol head-space needed by CAIF protocol,
+ *			excluding link layer.
+ * @proto_tail:		Protocol tail-space needed by CAIF protocol,
+ *			excluding link layer.
  */
 int cfcnfg_add_adaptation_layer(struct cfcnfg *cnfg,
 			    struct cfctrl_link_param *param,
-			    struct cflayer *adap_layer);
+			    struct cflayer *adap_layer,
+			    int *ifindex,
+			    int *proto_head,
+			    int *proto_tail);
 
 /**
  * cfcnfg_get_phyid() - Get physical ID, given type.