blob: 70a733d3d3daa1f13e1959e5d4c97e2fc303ab40 [file] [log] [blame]
/*
* Copyright (C) ST-Ericsson AB 2010
* Author: Sjur Brendeland/sjur.brandeland@stericsson.com
* License terms: GNU General Public License (GPL) version 2
*/
#include <linux/kernel.h>
#include <linux/stddef.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)
/* 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;
};
struct cfcnfg {
struct cflayer layer;
struct cflayer *ctrl;
struct cflayer *mux;
u8 last_phyid;
struct cfcnfg_phyinfo phy_layers[MAX_PHY_LAYERS];
};
static void cncfg_linkup_rsp(struct cflayer *layer, u8 linkid,
enum cfctrl_srv serv, u8 phyid,
struct cflayer *adapt_layer);
static void cncfg_linkdestroy_rsp(struct cflayer *layer, u8 linkid,
struct cflayer *client_layer);
static void cncfg_reject_rsp(struct cflayer *layer, u8 linkid,
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 = kmalloc(sizeof(struct cfcnfg), GFP_ATOMIC);
if (!this) {
pr_warning("CAIF: %s(): Out of memory\n", __func__);
return NULL;
}
memset(this, 0, sizeof(struct cfcnfg));
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 = cncfg_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 = cncfg_linkup_rsp;
resp->reject_rsp = cncfg_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_warning("CAIF: %s(): Out of memory\n", __func__);
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_named(struct cfcnfg *cnfg, char *name)
{
int i;
/* Try to match with specified name */
for (i = 0; i < MAX_PHY_LAYERS; i++) {
if (cnfg->phy_layers[i].frm_layer != NULL
&& strcmp(cnfg->phy_layers[i].phy_layer->name,
name) == 0)
return cnfg->phy_layers[i].frm_layer->id;
}
return 0;
}
/*
* NOTE: What happens on destroy failure:
* 1a) No response - Too early
* This will not happen because enumerate has already
* completed.
* 1b) No response - FATAL
* Not handled, but this should be a CAIF PROTOCOL ERROR
* Modem error, response is really expected - this
* case is not really handled.
* 2) O/E-bit indicate error
* Ignored - this link is destroyed anyway.
* 3) Not able to match on request
* Not handled, but this should be a CAIF PROTOCOL ERROR
* 4) Link-Error - (no response)
* Not handled, but this should be a CAIF PROTOCOL ERROR
*/
int cfcnfg_del_adapt_layer(struct cfcnfg *cnfg, struct cflayer *adap_layer)
{
u8 channel_id = 0;
int ret = 0;
struct cfcnfg_phyinfo *phyinfo = NULL;
u8 phyid = 0;
caif_assert(adap_layer != NULL);
channel_id = adap_layer->id;
if (channel_id == 0) {
pr_err("CAIF: %s():adap_layer->id is 0\n", __func__);
ret = -ENOTCONN;
goto end;
}
if (adap_layer->dn == NULL) {
pr_err("CAIF: %s():adap_layer->dn is NULL\n", __func__);
ret = -ENODEV;
goto end;
}
if (adap_layer->dn != NULL)
phyid = cfsrvl_getphyid(adap_layer->dn);
phyinfo = cfcnfg_get_phyinfo(cnfg, phyid);
if (phyinfo == NULL) {
pr_warning("CAIF: %s(): No interface to send disconnect to\n",
__func__);
ret = -ENODEV;
goto end;
}
if (phyinfo->id != phyid
|| phyinfo->phy_layer->id != phyid
|| phyinfo->frm_layer->id != phyid) {
pr_err("CAIF: %s(): Inconsistency in phy registration\n",
__func__);
ret = -EINVAL;
goto end;
}
ret = cfctrl_linkdown_req(cnfg->ctrl, channel_id, adap_layer);
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);
}
return ret;
}
EXPORT_SYMBOL(cfcnfg_del_adapt_layer);
static void cncfg_linkdestroy_rsp(struct cflayer *layer, u8 linkid,
struct cflayer *client_layer)
{
struct cfcnfg *cnfg = container_obj(layer);
struct cflayer *servl;
/*
* 1) Remove service from the MUX layer. The MUX must
* guarante that no more payload sent "upwards" (receive)
*/
servl = cfmuxl_remove_uplayer(cnfg->mux, linkid);
if (servl == NULL) {
pr_err("CAIF: %s(): PROTOCOL ERROR "
"- Error removing service_layer Linkid(%d)",
__func__, linkid);
return;
}
caif_assert(linkid == servl->id);
if (servl != client_layer && servl->up != client_layer) {
pr_err("CAIF: %s(): Error removing service_layer "
"Linkid(%d) %p %p",
__func__, linkid, (void *) servl,
(void *) client_layer);
return;
}
/*
* 2) DEINIT_RSP must guarantee that no more packets are transmitted
* from client (adap_layer) when it returns.
*/
if (servl->ctrlcmd == NULL) {
pr_err("CAIF: %s(): Error servl->ctrlcmd == NULL", __func__);
return;
}
servl->ctrlcmd(servl, CAIF_CTRLCMD_DEINIT_RSP, 0);
/* 3) It is now safe to destroy the service layer. */
cfservl_destroy(servl);
}
/*
* NOTE: What happens on linksetup failure:
* 1a) No response - Too early
* This will not happen because enumerate is secured
* before using interface.
* 1b) No response - FATAL
* Not handled, but this should be a CAIF PROTOCOL ERROR
* Modem error, response is really expected - this case is
* not really handled.
* 2) O/E-bit indicate error
* Handled in cnfg_reject_rsp
* 3) Not able to match on request
* Not handled, but this should be a CAIF PROTOCOL ERROR
* 4) Link-Error - (no response)
* Not handled, but this should be a CAIF PROTOCOL ERROR
*/
int
cfcnfg_add_adaptation_layer(struct cfcnfg *cnfg,
struct cfctrl_link_param *param,
struct cflayer *adap_layer)
{
struct cflayer *frml;
if (adap_layer == NULL) {
pr_err("CAIF: %s(): adap_layer is zero", __func__);
return -EINVAL;
}
if (adap_layer->receive == NULL) {
pr_err("CAIF: %s(): adap_layer->receive is NULL", __func__);
return -EINVAL;
}
if (adap_layer->ctrlcmd == NULL) {
pr_err("CAIF: %s(): adap_layer->ctrlcmd == NULL", __func__);
return -EINVAL;
}
frml = cnfg->phy_layers[param->phyid].frm_layer;
if (frml == NULL) {
pr_err("CAIF: %s(): Specified PHY type does not exist!",
__func__);
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);
/* FIXME: ENUMERATE INITIALLY WHEN ACTIVATING PHYSICAL INTERFACE */
cfctrl_enum_req(cnfg->ctrl, param->phyid);
cfctrl_linkup_request(cnfg->ctrl, param, adap_layer);
return 0;
}
EXPORT_SYMBOL(cfcnfg_add_adaptation_layer);
static void cncfg_reject_rsp(struct cflayer *layer, u8 linkid,
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
cncfg_linkup_rsp(struct cflayer *layer, u8 linkid, enum cfctrl_srv serv,
u8 phyid, struct cflayer *adapt_layer)
{
struct cfcnfg *cnfg = container_obj(layer);
struct cflayer *servicel = NULL;
struct cfcnfg_phyinfo *phyinfo;
if (adapt_layer == NULL) {
pr_err("CAIF: %s(): PROTOCOL ERROR "
"- LinkUp Request/Response did not match\n", __func__);
return;
}
caif_assert(cnfg != NULL);
caif_assert(phyid != 0);
phyinfo = &cnfg->phy_layers[phyid];
caif_assert(phyinfo != NULL);
caif_assert(phyinfo->id == phyid);
caif_assert(phyinfo->phy_layer != NULL);
caif_assert(phyinfo->phy_layer->id == phyid);
if (phyinfo != NULL &&
phyinfo->phy_ref_count++ == 0 &&
phyinfo->phy_layer != NULL &&
phyinfo->phy_layer->modemcmd != NULL) {
caif_assert(phyinfo->phy_layer->id == phyid);
phyinfo->phy_layer->modemcmd(phyinfo->phy_layer,
_CAIF_MODEMCMD_PHYIF_USEFULL);
}
adapt_layer->id = linkid;
switch (serv) {
case CFCTRL_SRV_VEI:
servicel = cfvei_create(linkid, &phyinfo->dev_info);
break;
case CFCTRL_SRV_DATAGRAM:
servicel = cfdgml_create(linkid, &phyinfo->dev_info);
break;
case CFCTRL_SRV_RFM:
servicel = cfrfml_create(linkid, &phyinfo->dev_info);
break;
case CFCTRL_SRV_UTIL:
servicel = cfutill_create(linkid, &phyinfo->dev_info);
break;
case CFCTRL_SRV_VIDEO:
servicel = cfvidl_create(linkid, &phyinfo->dev_info);
break;
case CFCTRL_SRV_DBG:
servicel = cfdbgl_create(linkid, &phyinfo->dev_info);
break;
default:
pr_err("CAIF: %s(): Protocol error. "
"Link setup response - unknown channel type\n",
__func__);
return;
}
if (!servicel) {
pr_warning("CAIF: %s(): Out of memory\n", __func__);
return;
}
layer_set_dn(servicel, cnfg->mux);
cfmuxl_set_uplayer(cnfg->mux, servicel, linkid);
layer_set_up(servicel, adapt_layer);
layer_set_dn(adapt_layer, servicel);
servicel->ctrlcmd(servicel, CAIF_CTRLCMD_INIT_RSP, 0);
}
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,
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("CAIF: %s(): No Available PHY ID\n", __func__);
return;
}
switch (phy_type) {
case CFPHYTYPE_FRAG:
phy_driver =
cfserl_create(CFPHYTYPE_FRAG, *phyid, stx);
if (!phy_driver) {
pr_warning("CAIF: %s(): Out of memory\n", __func__);
return;
}
break;
case CFPHYTYPE_CAIF:
phy_driver = NULL;
break;
default:
pr_err("CAIF: %s(): %d", __func__, 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;
phy_layer->type = phy_type;
frml = cffrml_create(*phyid, fcs);
if (!frml) {
pr_warning("CAIF: %s(): Out of memory\n", __func__);
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);