diff options
Diffstat (limited to 'net/caif/cfcnfg.c')
| -rw-r--r-- | net/caif/cfcnfg.c | 470 |
1 files changed, 470 insertions, 0 deletions
diff --git a/net/caif/cfcnfg.c b/net/caif/cfcnfg.c new file mode 100644 index 00000000000..df43f264d9f --- /dev/null +++ b/net/caif/cfcnfg.c @@ -0,0 +1,470 @@ +/* + * 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 <linux/slab.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 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_warning("CAIF: %s(): Out of memory\n", __func__); + 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_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; +} + +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("CAIF: %s():adap_layer->id is 0\n", __func__); + 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("CAIF: %s(): PROTOCOL ERROR " + "- Error removing service_layer Channel_Id(%d)", + __func__, 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_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; + } + } + 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 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); + 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; + if (adapt_layer == NULL) { + pr_debug("CAIF: %s(): link setup response " + "but no client exist, send linkdown back\n", + __func__); + 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 != 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 = 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: + servicel = cfrfml_create(channel_id, &phyinfo->dev_info); + 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("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, 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, + 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); |