From 2aa40aef9debc77d55cc87a50d335b6fe97fbeb0 Mon Sep 17 00:00:00 2001 From: Sjur Braendeland Date: Thu, 17 Jun 2010 06:55:40 +0000 Subject: 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 --- net/caif/cfcnfg.c | 44 ++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 40 insertions(+), 4 deletions(-) (limited to 'net/caif/cfcnfg.c') diff --git a/net/caif/cfcnfg.c b/net/caif/cfcnfg.c index cff2dcb..1c29189 100644 --- a/net/caif/cfcnfg.c +++ b/net/caif/cfcnfg.c @@ -6,6 +6,7 @@ #include #include #include +#include #include #include #include @@ -42,6 +43,15 @@ struct cfcnfg_phyinfo { /* Information about the physical device */ struct dev_info dev_info; + + /* Interface index */ + int ifindex; + + /* Use Start of frame extension */ + bool use_stx; + + /* Use Start of frame checksum */ + bool use_fcs; }; struct cfcnfg { @@ -249,9 +259,20 @@ static void cfcnfg_linkdestroy_rsp(struct cflayer *layer, u8 channel_id) { } +int protohead[CFCTRL_SRV_MASK] = { + [CFCTRL_SRV_VEI] = 4, + [CFCTRL_SRV_DATAGRAM] = 7, + [CFCTRL_SRV_UTIL] = 4, + [CFCTRL_SRV_RFM] = 3, + [CFCTRL_SRV_DBG] = 3, +}; + 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) { struct cflayer *frml; if (adap_layer == NULL) { @@ -277,6 +298,14 @@ int cfcnfg_add_adaptation_layer(struct cfcnfg *cnfg, param->phyid); caif_assert(cnfg->phy_layers[param->phyid].phy_layer->id == param->phyid); + + *ifindex = cnfg->phy_layers[param->phyid].ifindex; + *proto_head = + protohead[param->linktype]+ + (cnfg->phy_layers[param->phyid].use_stx ? 1 : 0); + + *proto_tail = 2; + /* FIXME: ENUMERATE INITIALLY WHEN ACTIVATING PHYSICAL INTERFACE */ cfctrl_enum_req(cnfg->ctrl, param->phyid); return cfctrl_linkup_request(cnfg->ctrl, param, adap_layer); @@ -298,6 +327,8 @@ cfcnfg_linkup_rsp(struct cflayer *layer, u8 channel_id, enum cfctrl_srv serv, struct cfcnfg *cnfg = container_obj(layer); struct cflayer *servicel = NULL; struct cfcnfg_phyinfo *phyinfo; + struct net_device *netdev; + if (adapt_layer == NULL) { pr_debug("CAIF: %s(): link setup response " "but no client exist, send linkdown back\n", @@ -329,8 +360,9 @@ cfcnfg_linkup_rsp(struct cflayer *layer, u8 channel_id, enum cfctrl_srv serv, servicel = cfdgml_create(channel_id, &phyinfo->dev_info); break; case CFCTRL_SRV_RFM: + netdev = phyinfo->dev_info.dev; servicel = cfrfml_create(channel_id, &phyinfo->dev_info, - RFM_FRAGMENT_SIZE); + netdev->mtu); break; case CFCTRL_SRV_UTIL: servicel = cfutill_create(channel_id, &phyinfo->dev_info); @@ -361,8 +393,8 @@ cfcnfg_linkup_rsp(struct cflayer *layer, u8 channel_id, enum cfctrl_srv serv, 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) { struct cflayer *frml; @@ -416,6 +448,10 @@ cfcnfg_add_phy_layer(struct cfcnfg *cnfg, enum cfcnfg_phy_type phy_type, cnfg->phy_layers[*phyid].dev_info.dev = dev; cnfg->phy_layers[*phyid].phy_layer = phy_layer; cnfg->phy_layers[*phyid].phy_ref_count = 0; + cnfg->phy_layers[*phyid].ifindex = dev->ifindex; + cnfg->phy_layers[*phyid].use_stx = stx; + cnfg->phy_layers[*phyid].use_fcs = fcs; + phy_layer->type = phy_type; frml = cffrml_create(*phyid, fcs); if (!frml) { -- cgit v1.1