[net-next-2.6.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 PHY_NAME_LEN 20

#define container_obj(layr) container_of(layr, struct cfcnfg, layer)
#define RFM_FRAGMENT_SIZE 4030

/* 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)
		goto end;
	layer_set_up(servl, NULL);
	ret = cfctrl_linkdown_req(cnfg->ctrl, channel_id, adap_layer);
	if (servl == NULL) {
		pr_err("PROTOCOL ERROR - Error removing service_layer Channel_Id(%d)",
		       channel_id);
		ret = -EINVAL;
		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)
{
}

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
	26	#define PHY_NAME_LEN 20
	27
	28	#define container_obj(layr) container_of(layr, struct cfcnfg, layer)
a7da1f55	29	#define RFM_FRAGMENT_SIZE 4030
15c9ac0c SB	30
	31	/* Information about CAIF physical interfaces held by Config Module in order
	32	* to manage physical interfaces
	33	*/
	34	struct cfcnfg_phyinfo {
	35	/* Pointer to the layer below the MUX (framing layer) */
	36	struct cflayer *frm_layer;
	37	/* Pointer to the lowest actual physical layer */
	38	struct cflayer *phy_layer;
	39	/* Unique identifier of the physical interface */
	40	unsigned int id;
	41	/* Preference of the physical in interface */
	42	enum cfcnfg_phy_preference pref;
	43
	44	/* Reference count, number of channels using the device */
	45	int phy_ref_count;
	46
	47	/* Information about the physical device */
	48	struct dev_info dev_info;
2aa40aef SB	49
	50	/* Interface index */
	51	int ifindex;
	52
	53	/* Use Start of frame extension */
	54	bool use_stx;
	55
	56	/* Use Start of frame checksum */
	57	bool use_fcs;
15c9ac0c SB	58	};
	59
	60	struct cfcnfg {
	61	struct cflayer layer;
	62	struct cflayer *ctrl;
	63	struct cflayer *mux;
	64	u8 last_phyid;
	65	struct cfcnfg_phyinfo phy_layers[MAX_PHY_LAYERS];
	66	};
	67
e539d83c	68	static void cfcnfg_linkup_rsp(struct cflayer *layer, u8 channel_id,
15c9ac0c SB	69	enum cfctrl_srv serv, u8 phyid,
15c9ac0c SB	70	struct cflayer *adapt_layer);
8d545c8f	71	static void cfcnfg_linkdestroy_rsp(struct cflayer *layer, u8 channel_id);
e539d83c	72	static void cfcnfg_reject_rsp(struct cflayer *layer, u8 channel_id,
15c9ac0c SB	73	struct cflayer *adapt_layer);
	74	static void cfctrl_resp_func(void);
	75	static void cfctrl_enum_resp(void);
	76
	77	struct cfcnfg *cfcnfg_create(void)
	78	{
	79	struct cfcnfg *this;
	80	struct cfctrl_rsp *resp;
	81	/* Initiate this layer */
49afa55b	82	this = kzalloc(sizeof(struct cfcnfg), GFP_ATOMIC);
15c9ac0c	83	if (!this) {
b31fa5ba	84	pr_warn("Out of memory\n");
15c9ac0c SB	85	return NULL;
15c9ac0c SB	86	}
15c9ac0c SB	87	this->mux = cfmuxl_create();
	88	if (!this->mux)
	89	goto out_of_mem;
	90	this->ctrl = cfctrl_create();
	91	if (!this->ctrl)
	92	goto out_of_mem;
	93	/* Initiate response functions */
	94	resp = cfctrl_get_respfuncs(this->ctrl);
	95	resp->enum_rsp = cfctrl_enum_resp;
	96	resp->linkerror_ind = cfctrl_resp_func;
e539d83c	97	resp->linkdestroy_rsp = cfcnfg_linkdestroy_rsp;
15c9ac0c SB	98	resp->sleep_rsp = cfctrl_resp_func;
	99	resp->wake_rsp = cfctrl_resp_func;
	100	resp->restart_rsp = cfctrl_resp_func;
	101	resp->radioset_rsp = cfctrl_resp_func;
e539d83c SB	102	resp->linksetup_rsp = cfcnfg_linkup_rsp;
e539d83c SB	103	resp->reject_rsp = cfcnfg_reject_rsp;
15c9ac0c SB	104
	105	this->last_phyid = 1;
	106
	107	cfmuxl_set_uplayer(this->mux, this->ctrl, 0);
	108	layer_set_dn(this->ctrl, this->mux);
	109	layer_set_up(this->ctrl, this);
	110	return this;
	111	out_of_mem:
b31fa5ba	112	pr_warn("Out of memory\n");
15c9ac0c SB	113	kfree(this->mux);
	114	kfree(this->ctrl);
	115	kfree(this);
	116	return NULL;
	117	}
	118	EXPORT_SYMBOL(cfcnfg_create);
	119
	120	void cfcnfg_remove(struct cfcnfg *cfg)
	121	{
	122	if (cfg) {
	123	kfree(cfg->mux);
	124	kfree(cfg->ctrl);
	125	kfree(cfg);
	126	}
	127	}
	128
	129	static void cfctrl_resp_func(void)
	130	{
	131	}
	132
	133	static void cfctrl_enum_resp(void)
	134	{
	135	}
	136
	137	struct dev_info cfcnfg_get_phyid(struct cfcnfg cnfg,
	138	enum cfcnfg_phy_preference phy_pref)
	139	{
	140	u16 i;
	141
	142	/* Try to match with specified preference */
	143	for (i = 1; i < MAX_PHY_LAYERS; i++) {
	144	if (cnfg->phy_layers[i].id == i &&
	145	cnfg->phy_layers[i].pref == phy_pref &&
	146	cnfg->phy_layers[i].frm_layer != NULL) {
	147	caif_assert(cnfg->phy_layers != NULL);
	148	caif_assert(cnfg->phy_layers[i].id == i);
	149	return &cnfg->phy_layers[i].dev_info;
	150	}
	151	}
	152	/* Otherwise just return something */
	153	for (i = 1; i < MAX_PHY_LAYERS; i++) {
	154	if (cnfg->phy_layers[i].id == i) {
	155	caif_assert(cnfg->phy_layers != NULL);
	156	caif_assert(cnfg->phy_layers[i].id == i);
	157	return &cnfg->phy_layers[i].dev_info;
	158	}
	159	}
	160
	161	return NULL;
	162	}
	163
	164	static struct cfcnfg_phyinfo cfcnfg_get_phyinfo(struct cfcnfg cnfg,
	165	u8 phyid)
	166	{
	167	int i;
	168	/* Try to match with specified preference */
	169	for (i = 0; i < MAX_PHY_LAYERS; i++)
	170	if (cnfg->phy_layers[i].frm_layer != NULL &&
	171	cnfg->phy_layers[i].id == phyid)
	172	return &cnfg->phy_layers[i];
	173	return NULL;
	174	}
	175
f2527ec4 ACM	176
f2527ec4 ACM	177	int cfcnfg_get_id_from_ifi(struct cfcnfg *cnfg, int ifi)
15c9ac0c SB	178	{
15c9ac0c SB	179	int i;
f2527ec4 ACM	180	for (i = 0; i < MAX_PHY_LAYERS; i++)
	181	if (cnfg->phy_layers[i].frm_layer != NULL &&
	182	cnfg->phy_layers[i].ifindex == ifi)
	183	return i;
	184	return -ENODEV;
15c9ac0c SB	185	}
15c9ac0c SB	186
e539d83c	187	int cfcnfg_disconn_adapt_layer(struct cfcnfg cnfg, struct cflayer adap_layer)
15c9ac0c SB	188	{
	189	u8 channel_id = 0;
	190	int ret = 0;
8d545c8f	191	struct cflayer *servl = NULL;
15c9ac0c SB	192	struct cfcnfg_phyinfo *phyinfo = NULL;
15c9ac0c SB	193	u8 phyid = 0;
15c9ac0c SB	194	caif_assert(adap_layer != NULL);
15c9ac0c SB	195	channel_id = adap_layer->id;
8d545c8f	196	if (adap_layer->dn == NULL \|\| channel_id == 0) {
b04367df	197	pr_err("adap_layer->dn == NULL or adap_layer->id is 0\n");
15c9ac0c SB	198	ret = -ENOTCONN;
	199	goto end;
	200	}
8d545c8f SB	201	servl = cfmuxl_remove_uplayer(cnfg->mux, channel_id);
8d545c8f SB	202	if (servl == NULL)
15c9ac0c	203	goto end;
8d545c8f SB	204	layer_set_up(servl, NULL);
	205	ret = cfctrl_linkdown_req(cnfg->ctrl, channel_id, adap_layer);
	206	if (servl == NULL) {
b31fa5ba JP	207	pr_err("PROTOCOL ERROR - Error removing service_layer Channel_Id(%d)",
b31fa5ba JP	208	channel_id);
15c9ac0c SB	209	ret = -EINVAL;
	210	goto end;
	211	}
8d545c8f SB	212	caif_assert(channel_id == servl->id);
	213	if (adap_layer->dn != NULL) {
	214	phyid = cfsrvl_getphyid(adap_layer->dn);
15c9ac0c	215
8d545c8f SB	216	phyinfo = cfcnfg_get_phyinfo(cnfg, phyid);
8d545c8f SB	217	if (phyinfo == NULL) {
b31fa5ba	218	pr_warn("No interface to send disconnect to\n");
8d545c8f SB	219	ret = -ENODEV;
	220	goto end;
	221	}
	222	if (phyinfo->id != phyid \|\|
	223	phyinfo->phy_layer->id != phyid \|\|
	224	phyinfo->frm_layer->id != phyid) {
b31fa5ba	225	pr_err("Inconsistency in phy registration\n");
8d545c8f SB	226	ret = -EINVAL;
	227	goto end;
	228	}
	229	}
15c9ac0c SB	230	if (phyinfo != NULL && --phyinfo->phy_ref_count == 0 &&
	231	phyinfo->phy_layer != NULL &&
	232	phyinfo->phy_layer->modemcmd != NULL) {
	233	phyinfo->phy_layer->modemcmd(phyinfo->phy_layer,
	234	_CAIF_MODEMCMD_PHYIF_USELESS);
	235	}
8d545c8f SB	236	end:
	237	cfsrvl_put(servl);
	238	cfctrl_cancel_req(cnfg->ctrl, adap_layer);
	239	if (adap_layer->ctrlcmd != NULL)
	240	adap_layer->ctrlcmd(adap_layer, CAIF_CTRLCMD_DEINIT_RSP, 0);
15c9ac0c SB	241	return ret;
	242
	243	}
e539d83c	244	EXPORT_SYMBOL(cfcnfg_disconn_adapt_layer);
15c9ac0c	245
5b208656 SB	246	void cfcnfg_release_adap_layer(struct cflayer *adap_layer)
	247	{
	248	if (adap_layer->dn)
	249	cfsrvl_put(adap_layer->dn);
	250	}
	251	EXPORT_SYMBOL(cfcnfg_release_adap_layer);
	252
8d545c8f	253	static void cfcnfg_linkdestroy_rsp(struct cflayer *layer, u8 channel_id)
15c9ac0c	254	{
15c9ac0c SB	255	}
15c9ac0c SB	256
2aa40aef SB	257	int protohead[CFCTRL_SRV_MASK] = {
	258	[CFCTRL_SRV_VEI] = 4,
	259	[CFCTRL_SRV_DATAGRAM] = 7,
	260	[CFCTRL_SRV_UTIL] = 4,
	261	[CFCTRL_SRV_RFM] = 3,
	262	[CFCTRL_SRV_DBG] = 3,
	263	};
	264
8d545c8f	265	int cfcnfg_add_adaptation_layer(struct cfcnfg *cnfg,
15c9ac0c	266	struct cfctrl_link_param *param,
2aa40aef SB	267	struct cflayer *adap_layer,
	268	int *ifindex,
	269	int *proto_head,
	270	int *proto_tail)
15c9ac0c SB	271	{
	272	struct cflayer *frml;
	273	if (adap_layer == NULL) {
b31fa5ba	274	pr_err("adap_layer is zero\n");
15c9ac0c SB	275	return -EINVAL;
	276	}
	277	if (adap_layer->receive == NULL) {
b31fa5ba	278	pr_err("adap_layer->receive is NULL\n");
15c9ac0c SB	279	return -EINVAL;
	280	}
	281	if (adap_layer->ctrlcmd == NULL) {
b31fa5ba	282	pr_err("adap_layer->ctrlcmd == NULL\n");
15c9ac0c SB	283	return -EINVAL;
	284	}
	285	frml = cnfg->phy_layers[param->phyid].frm_layer;
	286	if (frml == NULL) {
b31fa5ba	287	pr_err("Specified PHY type does not exist!\n");
15c9ac0c SB	288	return -ENODEV;
	289	}
	290	caif_assert(param->phyid == cnfg->phy_layers[param->phyid].id);
	291	caif_assert(cnfg->phy_layers[param->phyid].frm_layer->id ==
	292	param->phyid);
	293	caif_assert(cnfg->phy_layers[param->phyid].phy_layer->id ==
	294	param->phyid);
2aa40aef SB	295
	296	*ifindex = cnfg->phy_layers[param->phyid].ifindex;
	297	*proto_head =
	298	protohead[param->linktype]+
	299	(cnfg->phy_layers[param->phyid].use_stx ? 1 : 0);
	300
	301	*proto_tail = 2;
	302
15c9ac0c SB	303	/* FIXME: ENUMERATE INITIALLY WHEN ACTIVATING PHYSICAL INTERFACE */
15c9ac0c SB	304	cfctrl_enum_req(cnfg->ctrl, param->phyid);
8d545c8f	305	return cfctrl_linkup_request(cnfg->ctrl, param, adap_layer);
15c9ac0c SB	306	}
	307	EXPORT_SYMBOL(cfcnfg_add_adaptation_layer);
	308
e539d83c	309	static void cfcnfg_reject_rsp(struct cflayer *layer, u8 channel_id,
15c9ac0c SB	310	struct cflayer *adapt_layer)
	311	{
	312	if (adapt_layer != NULL && adapt_layer->ctrlcmd != NULL)
	313	adapt_layer->ctrlcmd(adapt_layer,
	314	CAIF_CTRLCMD_INIT_FAIL_RSP, 0);
	315	}
	316
	317	static void
e539d83c	318	cfcnfg_linkup_rsp(struct cflayer *layer, u8 channel_id, enum cfctrl_srv serv,
15c9ac0c SB	319	u8 phyid, struct cflayer *adapt_layer)
	320	{
	321	struct cfcnfg *cnfg = container_obj(layer);
	322	struct cflayer *servicel = NULL;
	323	struct cfcnfg_phyinfo *phyinfo;
2aa40aef SB	324	struct net_device *netdev;
2aa40aef SB	325
15c9ac0c	326	if (adapt_layer == NULL) {
b31fa5ba	327	pr_debug("link setup response but no client exist, send linkdown back\n");
8d545c8f	328	cfctrl_linkdown_req(cnfg->ctrl, channel_id, NULL);
15c9ac0c SB	329	return;
	330	}
	331
	332	caif_assert(cnfg != NULL);
	333	caif_assert(phyid != 0);
	334	phyinfo = &cnfg->phy_layers[phyid];
15c9ac0c SB	335	caif_assert(phyinfo->id == phyid);
	336	caif_assert(phyinfo->phy_layer != NULL);
	337	caif_assert(phyinfo->phy_layer->id == phyid);
	338
9bfca3c6 DC	339	phyinfo->phy_ref_count++;
9bfca3c6 DC	340	if (phyinfo->phy_ref_count == 1 &&
15c9ac0c	341	phyinfo->phy_layer->modemcmd != NULL) {
15c9ac0c SB	342	phyinfo->phy_layer->modemcmd(phyinfo->phy_layer,
15c9ac0c SB	343	_CAIF_MODEMCMD_PHYIF_USEFULL);
15c9ac0c	344	}
e539d83c	345	adapt_layer->id = channel_id;
15c9ac0c SB	346
	347	switch (serv) {
	348	case CFCTRL_SRV_VEI:
e539d83c	349	servicel = cfvei_create(channel_id, &phyinfo->dev_info);
15c9ac0c SB	350	break;
15c9ac0c SB	351	case CFCTRL_SRV_DATAGRAM:
e539d83c	352	servicel = cfdgml_create(channel_id, &phyinfo->dev_info);
15c9ac0c SB	353	break;
15c9ac0c SB	354	case CFCTRL_SRV_RFM:
2aa40aef	355	netdev = phyinfo->dev_info.dev;
a7da1f55	356	servicel = cfrfml_create(channel_id, &phyinfo->dev_info,
2aa40aef	357	netdev->mtu);
15c9ac0c SB	358	break;
15c9ac0c SB	359	case CFCTRL_SRV_UTIL:
e539d83c	360	servicel = cfutill_create(channel_id, &phyinfo->dev_info);
15c9ac0c SB	361	break;
15c9ac0c SB	362	case CFCTRL_SRV_VIDEO:
e539d83c	363	servicel = cfvidl_create(channel_id, &phyinfo->dev_info);
15c9ac0c SB	364	break;
15c9ac0c SB	365	case CFCTRL_SRV_DBG:
e539d83c	366	servicel = cfdbgl_create(channel_id, &phyinfo->dev_info);
15c9ac0c SB	367	break;
15c9ac0c SB	368	default:
b31fa5ba	369	pr_err("Protocol error. Link setup response - unknown channel type\n");
15c9ac0c SB	370	return;
	371	}
	372	if (!servicel) {
b31fa5ba	373	pr_warn("Out of memory\n");
15c9ac0c SB	374	return;
	375	}
	376	layer_set_dn(servicel, cnfg->mux);
e539d83c	377	cfmuxl_set_uplayer(cnfg->mux, servicel, channel_id);
15c9ac0c SB	378	layer_set_up(servicel, adapt_layer);
15c9ac0c SB	379	layer_set_dn(adapt_layer, servicel);
8d545c8f	380	cfsrvl_get(servicel);
15c9ac0c SB	381	servicel->ctrlcmd(servicel, CAIF_CTRLCMD_INIT_RSP, 0);
	382	}
	383
	384	void
	385	cfcnfg_add_phy_layer(struct cfcnfg *cnfg, enum cfcnfg_phy_type phy_type,
2aa40aef SB	386	struct net_device dev, struct cflayer phy_layer,
2aa40aef SB	387	u16 *phyid, enum cfcnfg_phy_preference pref,
15c9ac0c SB	388	bool fcs, bool stx)
	389	{
	390	struct cflayer *frml;
	391	struct cflayer *phy_driver = NULL;
	392	int i;
	393
	394
	395	if (cnfg->phy_layers[cnfg->last_phyid].frm_layer == NULL) {
	396	*phyid = cnfg->last_phyid;
	397
	398	/* range: * 1..(MAX_PHY_LAYERS-1) */
	399	cnfg->last_phyid =
	400	(cnfg->last_phyid % (MAX_PHY_LAYERS - 1)) + 1;
	401	} else {
	402	*phyid = 0;
	403	for (i = 1; i < MAX_PHY_LAYERS; i++) {
	404	if (cnfg->phy_layers[i].frm_layer == NULL) {
	405	*phyid = i;
	406	break;
	407	}
	408	}
	409	}
	410	if (*phyid == 0) {
b31fa5ba	411	pr_err("No Available PHY ID\n");
15c9ac0c SB	412	return;
	413	}
	414
	415	switch (phy_type) {
	416	case CFPHYTYPE_FRAG:
	417	phy_driver =
	418	cfserl_create(CFPHYTYPE_FRAG, *phyid, stx);
	419	if (!phy_driver) {
b31fa5ba	420	pr_warn("Out of memory\n");
15c9ac0c SB	421	return;
	422	}
	423
	424	break;
	425	case CFPHYTYPE_CAIF:
	426	phy_driver = NULL;
	427	break;
	428	default:
b31fa5ba	429	pr_err("%d\n", phy_type);
15c9ac0c SB	430	return;
	431	break;
	432	}
	433
	434	phy_layer->id = *phyid;
	435	cnfg->phy_layers[*phyid].pref = pref;
	436	cnfg->phy_layers[phyid].id = phyid;
	437	cnfg->phy_layers[phyid].dev_info.id = phyid;
	438	cnfg->phy_layers[*phyid].dev_info.dev = dev;
	439	cnfg->phy_layers[*phyid].phy_layer = phy_layer;
	440	cnfg->phy_layers[*phyid].phy_ref_count = 0;
2aa40aef SB	441	cnfg->phy_layers[*phyid].ifindex = dev->ifindex;
	442	cnfg->phy_layers[*phyid].use_stx = stx;
	443	cnfg->phy_layers[*phyid].use_fcs = fcs;
	444
15c9ac0c SB	445	phy_layer->type = phy_type;
	446	frml = cffrml_create(*phyid, fcs);
	447	if (!frml) {
b31fa5ba	448	pr_warn("Out of memory\n");
15c9ac0c SB	449	return;
	450	}
	451	cnfg->phy_layers[*phyid].frm_layer = frml;
	452	cfmuxl_set_dnlayer(cnfg->mux, frml, *phyid);
	453	layer_set_up(frml, cnfg->mux);
	454
	455	if (phy_driver != NULL) {
	456	phy_driver->id = *phyid;
	457	layer_set_dn(frml, phy_driver);
	458	layer_set_up(phy_driver, frml);
	459	layer_set_dn(phy_driver, phy_layer);
	460	layer_set_up(phy_layer, phy_driver);
	461	} else {
	462	layer_set_dn(frml, phy_layer);
	463	layer_set_up(phy_layer, frml);
	464	}
	465	}
	466	EXPORT_SYMBOL(cfcnfg_add_phy_layer);
	467
	468	int cfcnfg_del_phy_layer(struct cfcnfg cnfg, struct cflayer phy_layer)
	469	{
	470	struct cflayer frml, frml_dn;
	471	u16 phyid;
	472	phyid = phy_layer->id;
	473	caif_assert(phyid == cnfg->phy_layers[phyid].id);
	474	caif_assert(phy_layer == cnfg->phy_layers[phyid].phy_layer);
	475	caif_assert(phy_layer->id == phyid);
	476	caif_assert(cnfg->phy_layers[phyid].frm_layer->id == phyid);
	477
	478	memset(&cnfg->phy_layers[phy_layer->id], 0,
	479	sizeof(struct cfcnfg_phyinfo));
	480	frml = cfmuxl_remove_dnlayer(cnfg->mux, phy_layer->id);
	481	frml_dn = frml->dn;
	482	cffrml_set_uplayer(frml, NULL);
	483	cffrml_set_dnlayer(frml, NULL);
	484	kfree(frml);
	485
	486	if (phy_layer != frml_dn) {
	487	layer_set_up(frml_dn, NULL);
	488	layer_set_dn(frml_dn, NULL);
	489	kfree(frml_dn);
	490	}
	491	layer_set_up(phy_layer, NULL);
	492	return 0;
	493	}
	494	EXPORT_SYMBOL(cfcnfg_del_phy_layer);