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caif: Use link layer MTU instead of fixed MTU

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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>
This commit is contained in:
Sjur Braendeland
2010-06-17 06:55:40 +00:00
committed by David S. Miller
parent a7da1f55a8
commit 2aa40aef9d
15 changed files with 173 additions and 69 deletions
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8
include/net/caif/caif_dev.h
View File

@@ -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.

6
include/net/caif/caif_layer.h
View File

@@ -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.

16
include/net/caif/cfcnfg.h
View File

@@ -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.