[deliverable/linux.git] / net / caif / cfcnfg.c

/*
 * Copyright (C) ST-Ericsson AB 2010
 * Author:	Sjur Brendeland/sjur.brandeland@stericsson.com
 * License terms: GNU General Public License (GPL) version 2
 */

#define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__

#include <linux/kernel.h>
#include <linux/stddef.h>
#include <linux/slab.h>
#include <linux/netdevice.h>
#include <net/caif/caif_layer.h>
#include <net/caif/cfpkt.h>
#include <net/caif/cfcnfg.h>
#include <net/caif/cfctrl.h>
#include <net/caif/cfmuxl.h>
#include <net/caif/cffrml.h>
#include <net/caif/cfserl.h>
#include <net/caif/cfsrvl.h>

#include <linux/module.h>
#include <asm/atomic.h>

#define MAX_PHY_LAYERS 7

#define container_obj(layr) container_of(layr, struct cfcnfg, layer)

/* Information about CAIF physical interfaces held by Config Module in order
 * to manage physical interfaces
 */
struct cfcnfg_phyinfo {
	/* Pointer to the layer below the MUX (framing layer) */
	struct cflayer *frm_layer;
	/* Pointer to the lowest actual physical layer */
	struct cflayer *phy_layer;
	/* Unique identifier of the physical interface */
	unsigned int id;
	/* Preference of the physical in interface */
	enum cfcnfg_phy_preference pref;

	/* Reference count, number of channels using the device */
	int phy_ref_count;

	/* 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 {
	struct cflayer layer;
	struct cflayer *ctrl;
	struct cflayer *mux;
	u8 last_phyid;
	struct cfcnfg_phyinfo phy_layers[MAX_PHY_LAYERS];
};

static void cfcnfg_linkup_rsp(struct cflayer *layer, u8 channel_id,
			     enum cfctrl_srv serv, u8 phyid,
			     struct cflayer *adapt_layer);
static void cfcnfg_linkdestroy_rsp(struct cflayer *layer, u8 channel_id);
static void cfcnfg_reject_rsp(struct cflayer *layer, u8 channel_id,
			     struct cflayer *adapt_layer);
static void cfctrl_resp_func(void);
static void cfctrl_enum_resp(void);

struct cfcnfg *cfcnfg_create(void)
{
	struct cfcnfg *this;
	struct cfctrl_rsp *resp;
	/* Initiate this layer */
	this = kzalloc(sizeof(struct cfcnfg), GFP_ATOMIC);
	if (!this) {
		pr_warn("Out of memory\n");
		return NULL;
	}
	this->mux = cfmuxl_create();
	if (!this->mux)
		goto out_of_mem;
	this->ctrl = cfctrl_create();
	if (!this->ctrl)
		goto out_of_mem;
	/* Initiate response functions */
	resp = cfctrl_get_respfuncs(this->ctrl);
	resp->enum_rsp = cfctrl_enum_resp;
	resp->linkerror_ind = cfctrl_resp_func;
	resp->linkdestroy_rsp = cfcnfg_linkdestroy_rsp;
	resp->sleep_rsp = cfctrl_resp_func;
	resp->wake_rsp = cfctrl_resp_func;
	resp->restart_rsp = cfctrl_resp_func;
	resp->radioset_rsp = cfctrl_resp_func;
	resp->linksetup_rsp = cfcnfg_linkup_rsp;
	resp->reject_rsp = cfcnfg_reject_rsp;

	this->last_phyid = 1;

	cfmuxl_set_uplayer(this->mux, this->ctrl, 0);
	layer_set_dn(this->ctrl, this->mux);
	layer_set_up(this->ctrl, this);
	return this;
out_of_mem:
	pr_warn("Out of memory\n");
	kfree(this->mux);
	kfree(this->ctrl);
	kfree(this);
	return NULL;
}
EXPORT_SYMBOL(cfcnfg_create);

void cfcnfg_remove(struct cfcnfg *cfg)
{
	if (cfg) {
		kfree(cfg->mux);
		kfree(cfg->ctrl);
		kfree(cfg);
	}
}

static void cfctrl_resp_func(void)
{
}

static void cfctrl_enum_resp(void)
{
}

struct dev_info *cfcnfg_get_phyid(struct cfcnfg *cnfg,
				  enum cfcnfg_phy_preference phy_pref)
{
	u16 i;

	/* Try to match with specified preference */
	for (i = 1; i < MAX_PHY_LAYERS; i++) {
		if (cnfg->phy_layers[i].id == i &&
		     cnfg->phy_layers[i].pref == phy_pref &&
		     cnfg->phy_layers[i].frm_layer != NULL) {
			caif_assert(cnfg->phy_layers != NULL);
			caif_assert(cnfg->phy_layers[i].id == i);
			return &cnfg->phy_layers[i].dev_info;
		}
	}
	/* Otherwise just return something */
	for (i = 1; i < MAX_PHY_LAYERS; i++) {
		if (cnfg->phy_layers[i].id == i) {
			caif_assert(cnfg->phy_layers != NULL);
			caif_assert(cnfg->phy_layers[i].id == i);
			return &cnfg->phy_layers[i].dev_info;
		}
	}

	return NULL;
}

static struct cfcnfg_phyinfo *cfcnfg_get_phyinfo(struct cfcnfg *cnfg,
							u8 phyid)
{
	int i;
	/* Try to match with specified preference */
	for (i = 0; i < MAX_PHY_LAYERS; i++)
		if (cnfg->phy_layers[i].frm_layer != NULL &&
		    cnfg->phy_layers[i].id == phyid)
			return &cnfg->phy_layers[i];
	return NULL;
}


int cfcnfg_get_id_from_ifi(struct cfcnfg *cnfg, int ifi)
{
	int i;
	for (i = 0; i < MAX_PHY_LAYERS; i++)
		if (cnfg->phy_layers[i].frm_layer != NULL &&
				cnfg->phy_layers[i].ifindex == ifi)
			return i;
	return -ENODEV;
}

int cfcnfg_disconn_adapt_layer(struct cfcnfg *cnfg, struct cflayer *adap_layer)
{
	u8 channel_id = 0;
	int ret = 0;
	struct cflayer *servl = NULL;
	struct cfcnfg_phyinfo *phyinfo = NULL;
	u8 phyid = 0;

	caif_assert(adap_layer != NULL);
	channel_id = adap_layer->id;
	if (adap_layer->dn == NULL || channel_id == 0) {
		pr_err("adap_layer->dn == NULL or adap_layer->id is 0\n");
		ret = -ENOTCONN;
		goto end;
	}
	servl = cfmuxl_remove_uplayer(cnfg->mux, channel_id);
	if (servl == NULL) {
		pr_err("PROTOCOL ERROR - Error removing service_layer Channel_Id(%d)",
		       channel_id);
		ret = -EINVAL;
		goto end;
	}
	layer_set_up(servl, NULL);
	ret = cfctrl_linkdown_req(cnfg->ctrl, channel_id, adap_layer);
	if (ret)
		goto end;
	caif_assert(channel_id == servl->id);
	if (adap_layer->dn != NULL) {
		phyid = cfsrvl_getphyid(adap_layer->dn);

		phyinfo = cfcnfg_get_phyinfo(cnfg, phyid);
		if (phyinfo == NULL) {
			pr_warn("No interface to send disconnect to\n");
			ret = -ENODEV;
			goto end;
		}
		if (phyinfo->id != phyid ||
			phyinfo->phy_layer->id != phyid ||
			phyinfo->frm_layer->id != phyid) {
			pr_err("Inconsistency in phy registration\n");
			ret = -EINVAL;
			goto end;
		}
	}
	if (phyinfo != NULL && --phyinfo->phy_ref_count == 0 &&
		phyinfo->phy_layer != NULL &&
		phyinfo->phy_layer->modemcmd != NULL) {
		phyinfo->phy_layer->modemcmd(phyinfo->phy_layer,
					     _CAIF_MODEMCMD_PHYIF_USELESS);
	}
end:
	cfsrvl_put(servl);
	cfctrl_cancel_req(cnfg->ctrl, adap_layer);
	if (adap_layer->ctrlcmd != NULL)
		adap_layer->ctrlcmd(adap_layer, CAIF_CTRLCMD_DEINIT_RSP, 0);
	return ret;

}
EXPORT_SYMBOL(cfcnfg_disconn_adapt_layer);

void cfcnfg_release_adap_layer(struct cflayer *adap_layer)
{
	if (adap_layer->dn)
		cfsrvl_put(adap_layer->dn);
}
EXPORT_SYMBOL(cfcnfg_release_adap_layer);

static void cfcnfg_linkdestroy_rsp(struct cflayer *layer, u8 channel_id)
{
}

static const 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,
				int *ifindex,
				int *proto_head,
				int *proto_tail)
{
	struct cflayer *frml;
	if (adap_layer == NULL) {
		pr_err("adap_layer is zero\n");
		return -EINVAL;
	}
	if (adap_layer->receive == NULL) {
		pr_err("adap_layer->receive is NULL\n");
		return -EINVAL;
	}
	if (adap_layer->ctrlcmd == NULL) {
		pr_err("adap_layer->ctrlcmd == NULL\n");
		return -EINVAL;
	}
	frml = cnfg->phy_layers[param->phyid].frm_layer;
	if (frml == NULL) {
		pr_err("Specified PHY type does not exist!\n");
		return -ENODEV;
	}
	caif_assert(param->phyid == cnfg->phy_layers[param->phyid].id);
	caif_assert(cnfg->phy_layers[param->phyid].frm_layer->id ==
		     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);
}
EXPORT_SYMBOL(cfcnfg_add_adaptation_layer);

static void cfcnfg_reject_rsp(struct cflayer *layer, u8 channel_id,
			     struct cflayer *adapt_layer)
{
	if (adapt_layer != NULL && adapt_layer->ctrlcmd != NULL)
		adapt_layer->ctrlcmd(adapt_layer,
				     CAIF_CTRLCMD_INIT_FAIL_RSP, 0);
}

static void
cfcnfg_linkup_rsp(struct cflayer *layer, u8 channel_id, enum cfctrl_srv serv,
		 u8 phyid, struct cflayer *adapt_layer)
{
	struct cfcnfg *cnfg = container_obj(layer);
	struct cflayer *servicel = NULL;
	struct cfcnfg_phyinfo *phyinfo;
	struct net_device *netdev;

	if (adapt_layer == NULL) {
		pr_debug("link setup response but no client exist, send linkdown back\n");
		cfctrl_linkdown_req(cnfg->ctrl, channel_id, NULL);
		return;
	}

	caif_assert(cnfg != NULL);
	caif_assert(phyid != 0);
	phyinfo = &cnfg->phy_layers[phyid];
	caif_assert(phyinfo->id == phyid);
	caif_assert(phyinfo->phy_layer != NULL);
	caif_assert(phyinfo->phy_layer->id == phyid);

	phyinfo->phy_ref_count++;
	if (phyinfo->phy_ref_count == 1 &&
	    phyinfo->phy_layer->modemcmd != NULL) {
		phyinfo->phy_layer->modemcmd(phyinfo->phy_layer,
					     _CAIF_MODEMCMD_PHYIF_USEFULL);
	}
	adapt_layer->id = channel_id;

	switch (serv) {
	case CFCTRL_SRV_VEI:
		servicel = cfvei_create(channel_id, &phyinfo->dev_info);
		break;
	case CFCTRL_SRV_DATAGRAM:
		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,
						netdev->mtu);
		break;
	case CFCTRL_SRV_UTIL:
		servicel = cfutill_create(channel_id, &phyinfo->dev_info);
		break;
	case CFCTRL_SRV_VIDEO:
		servicel = cfvidl_create(channel_id, &phyinfo->dev_info);
		break;
	case CFCTRL_SRV_DBG:
		servicel = cfdbgl_create(channel_id, &phyinfo->dev_info);
		break;
	default:
		pr_err("Protocol error. Link setup response - unknown channel type\n");
		return;
	}
	if (!servicel) {
		pr_warn("Out of memory\n");
		return;
	}
	layer_set_dn(servicel, cnfg->mux);
	cfmuxl_set_uplayer(cnfg->mux, servicel, channel_id);
	layer_set_up(servicel, adapt_layer);
	layer_set_dn(adapt_layer, servicel);
	cfsrvl_get(servicel);
	servicel->ctrlcmd(servicel, CAIF_CTRLCMD_INIT_RSP, 0);
}

void
cfcnfg_add_phy_layer(struct cfcnfg *cnfg, enum cfcnfg_phy_type phy_type,
		     struct net_device *dev, struct cflayer *phy_layer,
		     u16 *phyid, enum cfcnfg_phy_preference pref,
		     bool fcs, bool stx)
{
	struct cflayer *frml;
	struct cflayer *phy_driver = NULL;
	int i;


	if (cnfg->phy_layers[cnfg->last_phyid].frm_layer == NULL) {
		*phyid = cnfg->last_phyid;

		/* range: * 1..(MAX_PHY_LAYERS-1) */
		cnfg->last_phyid =
		    (cnfg->last_phyid % (MAX_PHY_LAYERS - 1)) + 1;
	} else {
		*phyid = 0;
		for (i = 1; i < MAX_PHY_LAYERS; i++) {
			if (cnfg->phy_layers[i].frm_layer == NULL) {
				*phyid = i;
				break;
			}
		}
	}
	if (*phyid == 0) {
		pr_err("No Available PHY ID\n");
		return;
	}

	switch (phy_type) {
	case CFPHYTYPE_FRAG:
		phy_driver =
		    cfserl_create(CFPHYTYPE_FRAG, *phyid, stx);
		if (!phy_driver) {
			pr_warn("Out of memory\n");
			return;
		}

		break;
	case CFPHYTYPE_CAIF:
		phy_driver = NULL;
		break;
	default:
		pr_err("%d\n", phy_type);
		return;
		break;
	}

	phy_layer->id = *phyid;
	cnfg->phy_layers[*phyid].pref = pref;
	cnfg->phy_layers[*phyid].id = *phyid;
	cnfg->phy_layers[*phyid].dev_info.id = *phyid;
	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) {
		pr_warn("Out of memory\n");
		return;
	}
	cnfg->phy_layers[*phyid].frm_layer = frml;
	cfmuxl_set_dnlayer(cnfg->mux, frml, *phyid);
	layer_set_up(frml, cnfg->mux);

	if (phy_driver != NULL) {
		phy_driver->id = *phyid;
		layer_set_dn(frml, phy_driver);
		layer_set_up(phy_driver, frml);
		layer_set_dn(phy_driver, phy_layer);
		layer_set_up(phy_layer, phy_driver);
	} else {
		layer_set_dn(frml, phy_layer);
		layer_set_up(phy_layer, frml);
	}
}
EXPORT_SYMBOL(cfcnfg_add_phy_layer);

int cfcnfg_del_phy_layer(struct cfcnfg *cnfg, struct cflayer *phy_layer)
{
	struct cflayer *frml, *frml_dn;
	u16 phyid;
	phyid = phy_layer->id;
	caif_assert(phyid == cnfg->phy_layers[phyid].id);
	caif_assert(phy_layer == cnfg->phy_layers[phyid].phy_layer);
	caif_assert(phy_layer->id == phyid);
	caif_assert(cnfg->phy_layers[phyid].frm_layer->id == phyid);

	memset(&cnfg->phy_layers[phy_layer->id], 0,
	       sizeof(struct cfcnfg_phyinfo));
	frml = cfmuxl_remove_dnlayer(cnfg->mux, phy_layer->id);
	frml_dn = frml->dn;
	cffrml_set_uplayer(frml, NULL);
	cffrml_set_dnlayer(frml, NULL);
	kfree(frml);

	if (phy_layer != frml_dn) {
		layer_set_up(frml_dn, NULL);
		layer_set_dn(frml_dn, NULL);
		kfree(frml_dn);
	}
	layer_set_up(phy_layer, NULL);
	return 0;
}
EXPORT_SYMBOL(cfcnfg_del_phy_layer);
Commit	Line	Data
15c9ac0c SB	1	/*
	2	* Copyright (C) ST-Ericsson AB 2010
	3	* Author: Sjur Brendeland/sjur.brandeland@stericsson.com
	4	* License terms: GNU General Public License (GPL) version 2
	5	*/
b31fa5ba JP	6
	7	#define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__
	8
15c9ac0c SB	9	#include <linux/kernel.h>
15c9ac0c SB	10	#include <linux/stddef.h>
6c579906	11	#include <linux/slab.h>
2aa40aef	12	#include <linux/netdevice.h>
15c9ac0c SB	13	#include <net/caif/caif_layer.h>
	14	#include <net/caif/cfpkt.h>
	15	#include <net/caif/cfcnfg.h>
	16	#include <net/caif/cfctrl.h>
	17	#include <net/caif/cfmuxl.h>
	18	#include <net/caif/cffrml.h>
	19	#include <net/caif/cfserl.h>
	20	#include <net/caif/cfsrvl.h>
	21
	22	#include <linux/module.h>
	23	#include <asm/atomic.h>
	24
	25	#define MAX_PHY_LAYERS 7
15c9ac0c SB	26
	27	#define container_obj(layr) container_of(layr, struct cfcnfg, layer)
	28
	29	/* Information about CAIF physical interfaces held by Config Module in order
	30	* to manage physical interfaces
	31	*/
	32	struct cfcnfg_phyinfo {
	33	/* Pointer to the layer below the MUX (framing layer) */
	34	struct cflayer *frm_layer;
	35	/* Pointer to the lowest actual physical layer */
	36	struct cflayer *phy_layer;
	37	/* Unique identifier of the physical interface */
	38	unsigned int id;
	39	/* Preference of the physical in interface */
	40	enum cfcnfg_phy_preference pref;
	41
	42	/* Reference count, number of channels using the device */
	43	int phy_ref_count;
	44
	45	/* Information about the physical device */
	46	struct dev_info dev_info;
2aa40aef SB	47
	48	/* Interface index */
	49	int ifindex;
	50
	51	/* Use Start of frame extension */
	52	bool use_stx;
	53
	54	/* Use Start of frame checksum */
	55	bool use_fcs;
15c9ac0c SB	56	};
	57
	58	struct cfcnfg {
	59	struct cflayer layer;
	60	struct cflayer *ctrl;
	61	struct cflayer *mux;
	62	u8 last_phyid;
	63	struct cfcnfg_phyinfo phy_layers[MAX_PHY_LAYERS];
	64	};
	65
e539d83c	66	static void cfcnfg_linkup_rsp(struct cflayer *layer, u8 channel_id,
15c9ac0c SB	67	enum cfctrl_srv serv, u8 phyid,
15c9ac0c SB	68	struct cflayer *adapt_layer);
8d545c8f	69	static void cfcnfg_linkdestroy_rsp(struct cflayer *layer, u8 channel_id);
e539d83c	70	static void cfcnfg_reject_rsp(struct cflayer *layer, u8 channel_id,
15c9ac0c SB	71	struct cflayer *adapt_layer);
	72	static void cfctrl_resp_func(void);
	73	static void cfctrl_enum_resp(void);
	74
	75	struct cfcnfg *cfcnfg_create(void)
	76	{
	77	struct cfcnfg *this;
	78	struct cfctrl_rsp *resp;
	79	/* Initiate this layer */
49afa55b	80	this = kzalloc(sizeof(struct cfcnfg), GFP_ATOMIC);
15c9ac0c	81	if (!this) {
b31fa5ba	82	pr_warn("Out of memory\n");
15c9ac0c SB	83	return NULL;
15c9ac0c SB	84	}
15c9ac0c SB	85	this->mux = cfmuxl_create();
	86	if (!this->mux)
	87	goto out_of_mem;
	88	this->ctrl = cfctrl_create();
	89	if (!this->ctrl)
	90	goto out_of_mem;
	91	/* Initiate response functions */
	92	resp = cfctrl_get_respfuncs(this->ctrl);
	93	resp->enum_rsp = cfctrl_enum_resp;
	94	resp->linkerror_ind = cfctrl_resp_func;
e539d83c	95	resp->linkdestroy_rsp = cfcnfg_linkdestroy_rsp;
15c9ac0c SB	96	resp->sleep_rsp = cfctrl_resp_func;
	97	resp->wake_rsp = cfctrl_resp_func;
	98	resp->restart_rsp = cfctrl_resp_func;
	99	resp->radioset_rsp = cfctrl_resp_func;
e539d83c SB	100	resp->linksetup_rsp = cfcnfg_linkup_rsp;
e539d83c SB	101	resp->reject_rsp = cfcnfg_reject_rsp;
15c9ac0c SB	102
	103	this->last_phyid = 1;
	104
	105	cfmuxl_set_uplayer(this->mux, this->ctrl, 0);
	106	layer_set_dn(this->ctrl, this->mux);
	107	layer_set_up(this->ctrl, this);
	108	return this;
	109	out_of_mem:
b31fa5ba	110	pr_warn("Out of memory\n");
15c9ac0c SB	111	kfree(this->mux);
	112	kfree(this->ctrl);
	113	kfree(this);
	114	return NULL;
	115	}
	116	EXPORT_SYMBOL(cfcnfg_create);
	117
	118	void cfcnfg_remove(struct cfcnfg *cfg)
	119	{
	120	if (cfg) {
	121	kfree(cfg->mux);
	122	kfree(cfg->ctrl);
	123	kfree(cfg);
	124	}
	125	}
	126
	127	static void cfctrl_resp_func(void)
	128	{
	129	}
	130
	131	static void cfctrl_enum_resp(void)
	132	{
	133	}
	134
	135	struct dev_info cfcnfg_get_phyid(struct cfcnfg cnfg,
	136	enum cfcnfg_phy_preference phy_pref)
	137	{
	138	u16 i;
	139
	140	/* Try to match with specified preference */
	141	for (i = 1; i < MAX_PHY_LAYERS; i++) {
	142	if (cnfg->phy_layers[i].id == i &&
	143	cnfg->phy_layers[i].pref == phy_pref &&
	144	cnfg->phy_layers[i].frm_layer != NULL) {
	145	caif_assert(cnfg->phy_layers != NULL);
	146	caif_assert(cnfg->phy_layers[i].id == i);
	147	return &cnfg->phy_layers[i].dev_info;
	148	}
	149	}
	150	/* Otherwise just return something */
	151	for (i = 1; i < MAX_PHY_LAYERS; i++) {
	152	if (cnfg->phy_layers[i].id == i) {
	153	caif_assert(cnfg->phy_layers != NULL);
	154	caif_assert(cnfg->phy_layers[i].id == i);
	155	return &cnfg->phy_layers[i].dev_info;
	156	}
	157	}
	158
	159	return NULL;
	160	}
	161
	162	static struct cfcnfg_phyinfo cfcnfg_get_phyinfo(struct cfcnfg cnfg,
	163	u8 phyid)
	164	{
	165	int i;
	166	/* Try to match with specified preference */
	167	for (i = 0; i < MAX_PHY_LAYERS; i++)
	168	if (cnfg->phy_layers[i].frm_layer != NULL &&
	169	cnfg->phy_layers[i].id == phyid)
	170	return &cnfg->phy_layers[i];
	171	return NULL;
	172	}
	173
f2527ec4 ACM	174
f2527ec4 ACM	175	int cfcnfg_get_id_from_ifi(struct cfcnfg *cnfg, int ifi)
15c9ac0c SB	176	{
15c9ac0c SB	177	int i;
f2527ec4 ACM	178	for (i = 0; i < MAX_PHY_LAYERS; i++)
	179	if (cnfg->phy_layers[i].frm_layer != NULL &&
	180	cnfg->phy_layers[i].ifindex == ifi)
	181	return i;
	182	return -ENODEV;
15c9ac0c SB	183	}
15c9ac0c SB	184
e539d83c	185	int cfcnfg_disconn_adapt_layer(struct cfcnfg cnfg, struct cflayer adap_layer)
15c9ac0c SB	186	{
	187	u8 channel_id = 0;
	188	int ret = 0;
8d545c8f	189	struct cflayer *servl = NULL;
15c9ac0c SB	190	struct cfcnfg_phyinfo *phyinfo = NULL;
15c9ac0c SB	191	u8 phyid = 0;
01a85901	192
15c9ac0c SB	193	caif_assert(adap_layer != NULL);
15c9ac0c SB	194	channel_id = adap_layer->id;
8d545c8f	195	if (adap_layer->dn == NULL \|\| channel_id == 0) {
b04367df	196	pr_err("adap_layer->dn == NULL or adap_layer->id is 0\n");
15c9ac0c SB	197	ret = -ENOTCONN;
	198	goto end;
	199	}
8d545c8f	200	servl = cfmuxl_remove_uplayer(cnfg->mux, channel_id);
8d545c8f	201	if (servl == NULL) {
b31fa5ba JP	202	pr_err("PROTOCOL ERROR - Error removing service_layer Channel_Id(%d)",
b31fa5ba JP	203	channel_id);
15c9ac0c SB	204	ret = -EINVAL;
	205	goto end;
	206	}
01a85901 DC	207	layer_set_up(servl, NULL);
	208	ret = cfctrl_linkdown_req(cnfg->ctrl, channel_id, adap_layer);
	209	if (ret)
	210	goto end;
8d545c8f SB	211	caif_assert(channel_id == servl->id);
	212	if (adap_layer->dn != NULL) {
	213	phyid = cfsrvl_getphyid(adap_layer->dn);
15c9ac0c	214
8d545c8f SB	215	phyinfo = cfcnfg_get_phyinfo(cnfg, phyid);
8d545c8f SB	216	if (phyinfo == NULL) {
b31fa5ba	217	pr_warn("No interface to send disconnect to\n");
8d545c8f SB	218	ret = -ENODEV;
	219	goto end;
	220	}
	221	if (phyinfo->id != phyid \|\|
	222	phyinfo->phy_layer->id != phyid \|\|
	223	phyinfo->frm_layer->id != phyid) {
b31fa5ba	224	pr_err("Inconsistency in phy registration\n");
8d545c8f SB	225	ret = -EINVAL;
	226	goto end;
	227	}
	228	}
15c9ac0c SB	229	if (phyinfo != NULL && --phyinfo->phy_ref_count == 0 &&
	230	phyinfo->phy_layer != NULL &&
	231	phyinfo->phy_layer->modemcmd != NULL) {
	232	phyinfo->phy_layer->modemcmd(phyinfo->phy_layer,
	233	_CAIF_MODEMCMD_PHYIF_USELESS);
	234	}
8d545c8f SB	235	end:
	236	cfsrvl_put(servl);
	237	cfctrl_cancel_req(cnfg->ctrl, adap_layer);
	238	if (adap_layer->ctrlcmd != NULL)
	239	adap_layer->ctrlcmd(adap_layer, CAIF_CTRLCMD_DEINIT_RSP, 0);
15c9ac0c SB	240	return ret;
	241
	242	}
e539d83c	243	EXPORT_SYMBOL(cfcnfg_disconn_adapt_layer);
15c9ac0c	244
5b208656 SB	245	void cfcnfg_release_adap_layer(struct cflayer *adap_layer)
	246	{
	247	if (adap_layer->dn)
	248	cfsrvl_put(adap_layer->dn);
	249	}
	250	EXPORT_SYMBOL(cfcnfg_release_adap_layer);
	251
8d545c8f	252	static void cfcnfg_linkdestroy_rsp(struct cflayer *layer, u8 channel_id)
15c9ac0c	253	{
15c9ac0c SB	254	}
15c9ac0c SB	255
73d6ac63	256	static const int protohead[CFCTRL_SRV_MASK] = {
2aa40aef SB	257	[CFCTRL_SRV_VEI] = 4,
	258	[CFCTRL_SRV_DATAGRAM] = 7,
	259	[CFCTRL_SRV_UTIL] = 4,
	260	[CFCTRL_SRV_RFM] = 3,
	261	[CFCTRL_SRV_DBG] = 3,
	262	};
	263
8d545c8f	264	int cfcnfg_add_adaptation_layer(struct cfcnfg *cnfg,
15c9ac0c	265	struct cfctrl_link_param *param,
2aa40aef SB	266	struct cflayer *adap_layer,
	267	int *ifindex,
	268	int *proto_head,
	269	int *proto_tail)
15c9ac0c SB	270	{
	271	struct cflayer *frml;
	272	if (adap_layer == NULL) {
b31fa5ba	273	pr_err("adap_layer is zero\n");
15c9ac0c SB	274	return -EINVAL;
	275	}
	276	if (adap_layer->receive == NULL) {
b31fa5ba	277	pr_err("adap_layer->receive is NULL\n");
15c9ac0c SB	278	return -EINVAL;
	279	}
	280	if (adap_layer->ctrlcmd == NULL) {
b31fa5ba	281	pr_err("adap_layer->ctrlcmd == NULL\n");
15c9ac0c SB	282	return -EINVAL;
	283	}
	284	frml = cnfg->phy_layers[param->phyid].frm_layer;
	285	if (frml == NULL) {
b31fa5ba	286	pr_err("Specified PHY type does not exist!\n");
15c9ac0c SB	287	return -ENODEV;
	288	}
	289	caif_assert(param->phyid == cnfg->phy_layers[param->phyid].id);
	290	caif_assert(cnfg->phy_layers[param->phyid].frm_layer->id ==
	291	param->phyid);
	292	caif_assert(cnfg->phy_layers[param->phyid].phy_layer->id ==
	293	param->phyid);
2aa40aef SB	294
	295	*ifindex = cnfg->phy_layers[param->phyid].ifindex;
	296	*proto_head =
	297	protohead[param->linktype]+
	298	(cnfg->phy_layers[param->phyid].use_stx ? 1 : 0);
	299
	300	*proto_tail = 2;
	301
15c9ac0c SB	302	/* FIXME: ENUMERATE INITIALLY WHEN ACTIVATING PHYSICAL INTERFACE */
15c9ac0c SB	303	cfctrl_enum_req(cnfg->ctrl, param->phyid);
8d545c8f	304	return cfctrl_linkup_request(cnfg->ctrl, param, adap_layer);
15c9ac0c SB	305	}
	306	EXPORT_SYMBOL(cfcnfg_add_adaptation_layer);
	307
e539d83c	308	static void cfcnfg_reject_rsp(struct cflayer *layer, u8 channel_id,
15c9ac0c SB	309	struct cflayer *adapt_layer)
	310	{
	311	if (adapt_layer != NULL && adapt_layer->ctrlcmd != NULL)
	312	adapt_layer->ctrlcmd(adapt_layer,
	313	CAIF_CTRLCMD_INIT_FAIL_RSP, 0);
	314	}
	315
	316	static void
e539d83c	317	cfcnfg_linkup_rsp(struct cflayer *layer, u8 channel_id, enum cfctrl_srv serv,
15c9ac0c SB	318	u8 phyid, struct cflayer *adapt_layer)
	319	{
	320	struct cfcnfg *cnfg = container_obj(layer);
	321	struct cflayer *servicel = NULL;
	322	struct cfcnfg_phyinfo *phyinfo;
2aa40aef SB	323	struct net_device *netdev;
2aa40aef SB	324
15c9ac0c	325	if (adapt_layer == NULL) {
b31fa5ba	326	pr_debug("link setup response but no client exist, send linkdown back\n");
8d545c8f	327	cfctrl_linkdown_req(cnfg->ctrl, channel_id, NULL);
15c9ac0c SB	328	return;
	329	}
	330
	331	caif_assert(cnfg != NULL);
	332	caif_assert(phyid != 0);
	333	phyinfo = &cnfg->phy_layers[phyid];
15c9ac0c SB	334	caif_assert(phyinfo->id == phyid);
	335	caif_assert(phyinfo->phy_layer != NULL);
	336	caif_assert(phyinfo->phy_layer->id == phyid);
	337
9bfca3c6 DC	338	phyinfo->phy_ref_count++;
9bfca3c6 DC	339	if (phyinfo->phy_ref_count == 1 &&
15c9ac0c	340	phyinfo->phy_layer->modemcmd != NULL) {
15c9ac0c SB	341	phyinfo->phy_layer->modemcmd(phyinfo->phy_layer,
15c9ac0c SB	342	_CAIF_MODEMCMD_PHYIF_USEFULL);
15c9ac0c	343	}
e539d83c	344	adapt_layer->id = channel_id;
15c9ac0c SB	345
	346	switch (serv) {
	347	case CFCTRL_SRV_VEI:
e539d83c	348	servicel = cfvei_create(channel_id, &phyinfo->dev_info);
15c9ac0c SB	349	break;
15c9ac0c SB	350	case CFCTRL_SRV_DATAGRAM:
e539d83c	351	servicel = cfdgml_create(channel_id, &phyinfo->dev_info);
15c9ac0c SB	352	break;
15c9ac0c SB	353	case CFCTRL_SRV_RFM:
2aa40aef	354	netdev = phyinfo->dev_info.dev;
a7da1f55	355	servicel = cfrfml_create(channel_id, &phyinfo->dev_info,
2aa40aef	356	netdev->mtu);
15c9ac0c SB	357	break;
15c9ac0c SB	358	case CFCTRL_SRV_UTIL:
e539d83c	359	servicel = cfutill_create(channel_id, &phyinfo->dev_info);
15c9ac0c SB	360	break;
15c9ac0c SB	361	case CFCTRL_SRV_VIDEO:
e539d83c	362	servicel = cfvidl_create(channel_id, &phyinfo->dev_info);
15c9ac0c SB	363	break;
15c9ac0c SB	364	case CFCTRL_SRV_DBG:
e539d83c	365	servicel = cfdbgl_create(channel_id, &phyinfo->dev_info);
15c9ac0c SB	366	break;
15c9ac0c SB	367	default:
b31fa5ba	368	pr_err("Protocol error. Link setup response - unknown channel type\n");
15c9ac0c SB	369	return;
	370	}
	371	if (!servicel) {
b31fa5ba	372	pr_warn("Out of memory\n");
15c9ac0c SB	373	return;
	374	}
	375	layer_set_dn(servicel, cnfg->mux);
e539d83c	376	cfmuxl_set_uplayer(cnfg->mux, servicel, channel_id);
15c9ac0c SB	377	layer_set_up(servicel, adapt_layer);
15c9ac0c SB	378	layer_set_dn(adapt_layer, servicel);
8d545c8f	379	cfsrvl_get(servicel);
15c9ac0c SB	380	servicel->ctrlcmd(servicel, CAIF_CTRLCMD_INIT_RSP, 0);
	381	}
	382
	383	void
	384	cfcnfg_add_phy_layer(struct cfcnfg *cnfg, enum cfcnfg_phy_type phy_type,
2aa40aef SB	385	struct net_device dev, struct cflayer phy_layer,
2aa40aef SB	386	u16 *phyid, enum cfcnfg_phy_preference pref,
15c9ac0c SB	387	bool fcs, bool stx)
	388	{
	389	struct cflayer *frml;
	390	struct cflayer *phy_driver = NULL;
	391	int i;
	392
	393
	394	if (cnfg->phy_layers[cnfg->last_phyid].frm_layer == NULL) {
	395	*phyid = cnfg->last_phyid;
	396
	397	/* range: * 1..(MAX_PHY_LAYERS-1) */
	398	cnfg->last_phyid =
	399	(cnfg->last_phyid % (MAX_PHY_LAYERS - 1)) + 1;
	400	} else {
	401	*phyid = 0;
	402	for (i = 1; i < MAX_PHY_LAYERS; i++) {
	403	if (cnfg->phy_layers[i].frm_layer == NULL) {
	404	*phyid = i;
	405	break;
	406	}
	407	}
	408	}
	409	if (*phyid == 0) {
b31fa5ba	410	pr_err("No Available PHY ID\n");
15c9ac0c SB	411	return;
	412	}
	413
	414	switch (phy_type) {
	415	case CFPHYTYPE_FRAG:
	416	phy_driver =
	417	cfserl_create(CFPHYTYPE_FRAG, *phyid, stx);
	418	if (!phy_driver) {
b31fa5ba	419	pr_warn("Out of memory\n");
15c9ac0c SB	420	return;
	421	}
	422
	423	break;
	424	case CFPHYTYPE_CAIF:
	425	phy_driver = NULL;
	426	break;
	427	default:
b31fa5ba	428	pr_err("%d\n", phy_type);
15c9ac0c SB	429	return;
	430	break;
	431	}
	432
	433	phy_layer->id = *phyid;
	434	cnfg->phy_layers[*phyid].pref = pref;
	435	cnfg->phy_layers[phyid].id = phyid;
	436	cnfg->phy_layers[phyid].dev_info.id = phyid;
	437	cnfg->phy_layers[*phyid].dev_info.dev = dev;
	438	cnfg->phy_layers[*phyid].phy_layer = phy_layer;
	439	cnfg->phy_layers[*phyid].phy_ref_count = 0;
2aa40aef SB	440	cnfg->phy_layers[*phyid].ifindex = dev->ifindex;
	441	cnfg->phy_layers[*phyid].use_stx = stx;
	442	cnfg->phy_layers[*phyid].use_fcs = fcs;
	443
15c9ac0c SB	444	phy_layer->type = phy_type;
	445	frml = cffrml_create(*phyid, fcs);
	446	if (!frml) {
b31fa5ba	447	pr_warn("Out of memory\n");
15c9ac0c SB	448	return;
	449	}
	450	cnfg->phy_layers[*phyid].frm_layer = frml;
	451	cfmuxl_set_dnlayer(cnfg->mux, frml, *phyid);
	452	layer_set_up(frml, cnfg->mux);
	453
	454	if (phy_driver != NULL) {
	455	phy_driver->id = *phyid;
	456	layer_set_dn(frml, phy_driver);
	457	layer_set_up(phy_driver, frml);
	458	layer_set_dn(phy_driver, phy_layer);
	459	layer_set_up(phy_layer, phy_driver);
	460	} else {
	461	layer_set_dn(frml, phy_layer);
	462	layer_set_up(phy_layer, frml);
	463	}
	464	}
	465	EXPORT_SYMBOL(cfcnfg_add_phy_layer);
	466
	467	int cfcnfg_del_phy_layer(struct cfcnfg cnfg, struct cflayer phy_layer)
	468	{
	469	struct cflayer frml, frml_dn;
	470	u16 phyid;
	471	phyid = phy_layer->id;
	472	caif_assert(phyid == cnfg->phy_layers[phyid].id);
	473	caif_assert(phy_layer == cnfg->phy_layers[phyid].phy_layer);
	474	caif_assert(phy_layer->id == phyid);
	475	caif_assert(cnfg->phy_layers[phyid].frm_layer->id == phyid);
	476
	477	memset(&cnfg->phy_layers[phy_layer->id], 0,
	478	sizeof(struct cfcnfg_phyinfo));
	479	frml = cfmuxl_remove_dnlayer(cnfg->mux, phy_layer->id);
	480	frml_dn = frml->dn;
	481	cffrml_set_uplayer(frml, NULL);
	482	cffrml_set_dnlayer(frml, NULL);
	483	kfree(frml);
	484
	485	if (phy_layer != frml_dn) {
	486	layer_set_up(frml_dn, NULL);
	487	layer_set_dn(frml_dn, NULL);
	488	kfree(frml_dn);
	489	}
	490	layer_set_up(phy_layer, NULL);
	491	return 0;
	492	}
	493	EXPORT_SYMBOL(cfcnfg_del_phy_layer);