drivers/wlan/third_party/broadcom/brcmfmac/fweh.c - garnet - Git at Google

 /*
  * Copyright (c) 2012 Broadcom Corporation
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies.
  *
  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */

 #include "fweh.h"

 #include <threads.h>

 #include "brcmu_utils.h"
 #include "brcmu_wifi.h"
 #include "cfg80211.h"
 #include "core.h"
 #include "debug.h"
 #include "device.h"
 #include "fwil.h"
 #include "linuxisms.h"
 #include "proto.h"
 #include "workqueue.h"

 /**
  * struct brcmf_fweh_queue_item - event item on event queue.
  *
  * @q: list element for queuing.
  * @code: event code.
  * @ifidx: interface index related to this event.
  * @ifaddr: ethernet address for interface.
  * @emsg: common parameters of the firmware event message.
  * @data: event specific data part of the firmware event.
  */
 struct brcmf_fweh_queue_item {
     struct list_node q;
     enum brcmf_fweh_event_code code;
     uint8_t ifidx;
     uint8_t ifaddr[ETH_ALEN];
     struct brcmf_event_msg_be emsg;
     uint32_t datalen;
     uint8_t data[0];
 };

 /**
  * struct brcmf_fweh_event_name - code, name mapping entry.
  */
 struct brcmf_fweh_event_name {
     enum brcmf_fweh_event_code code;
     const char* name;
 };

 #ifdef DEBUG
 #define BRCMF_ENUM_DEF(id, val) {val, #id},

 /* array for mapping code to event name */
 static struct brcmf_fweh_event_name fweh_event_names[] = {BRCMF_FWEH_EVENT_ENUM_DEFLIST};
 #undef BRCMF_ENUM_DEF

 /**
  * brcmf_fweh_event_name() - returns name for given event code.
  *
  * @code: code to lookup.
  */
 const char* brcmf_fweh_event_name(enum brcmf_fweh_event_code code) {
     int i;
     for (i = 0; i < (int)countof(fweh_event_names); i++) {
         if (fweh_event_names[i].code == code) {
             return fweh_event_names[i].name;
         }
     }
     return "unknown";
 }
 #else
 const char* brcmf_fweh_event_name(enum brcmf_fweh_event_code code) {
     return "nodebug";
 }
 #endif

 /**
  * brcmf_fweh_queue_event() - create and queue event.
  *
  * @fweh: firmware event handling info.
  * @event: event queue entry.
  */
 static void brcmf_fweh_queue_event(struct brcmf_fweh_info* fweh,
                                    struct brcmf_fweh_queue_item* event) {
     //spin_lock_irqsave(&fweh->evt_q_lock, flags);
     pthread_mutex_lock(&irq_callback_lock);
     list_add_tail(&fweh->event_q, &event->q);
     //spin_unlock_irqrestore(&fweh->evt_q_lock, flags);
     pthread_mutex_unlock(&irq_callback_lock);
     workqueue_schedule_default(&fweh->event_work);
 }

 static zx_status_t brcmf_fweh_call_event_handler(struct brcmf_if* ifp,
                                                  enum brcmf_fweh_event_code code,
                                                  struct brcmf_event_msg* emsg, void* data) {
     struct brcmf_fweh_info* fweh;
     zx_status_t err = ZX_ERR_IO;

     if (ifp) {
         fweh = &ifp->drvr->fweh;

         /* handle the event if valid interface and handler */
         if (fweh->evt_handler[code]) {
             err = fweh->evt_handler[code](ifp, emsg, data);
         } else {
             brcmf_err("unhandled event %d ignored\n", code);
         }
     } else {
         brcmf_err("no interface object\n");
     }
     return err;
 }

 /**
  * brcmf_fweh_handle_if_event() - handle IF event.
  *
  * @drvr: driver information object.
  * @item: queue entry.
  * @ifpp: interface object (may change upon ADD action).
  */
 static void brcmf_fweh_handle_if_event(struct brcmf_pub* drvr, struct brcmf_event_msg* emsg,
                                        void* data) {
     struct brcmf_if_event* ifevent = data;
     struct brcmf_if* ifp;
     bool is_p2pdev;
     zx_status_t err = ZX_OK;

     brcmf_dbg(EVENT, "action: %u ifidx: %u bsscfgidx: %u flags: %u role: %u\n", ifevent->action,
               ifevent->ifidx, ifevent->bsscfgidx, ifevent->flags, ifevent->role);

     /* The P2P Device interface event must not be ignored contrary to what
      * firmware tells us. Older firmware uses p2p noif, with sta role.
      * This should be accepted when p2pdev_setup is ongoing. TDLS setup will
      * use the same ifevent and should be ignored.
      */
     is_p2pdev = ((ifevent->flags & BRCMF_E_IF_FLAG_NOIF) &&
                  (ifevent->role == BRCMF_E_IF_ROLE_P2P_CLIENT ||
                   ((ifevent->role == BRCMF_E_IF_ROLE_STA) && (drvr->fweh.p2pdev_setup_ongoing))));
     if (!is_p2pdev && (ifevent->flags & BRCMF_E_IF_FLAG_NOIF)) {
         brcmf_dbg(EVENT, "event can be ignored\n");
         return;
     }
     if (ifevent->ifidx >= BRCMF_MAX_IFS) {
         brcmf_err("invalid interface index: %u\n", ifevent->ifidx);
         return;
     }

     ifp = drvr->iflist[ifevent->bsscfgidx];

     if (ifevent->action == BRCMF_E_IF_ADD) {
         brcmf_dbg(EVENT, "adding %s (%pM)\n", emsg->ifname, emsg->addr);
         err = brcmf_add_if(drvr, ifevent->bsscfgidx, ifevent->ifidx, is_p2pdev, emsg->ifname,
                            emsg->addr, &ifp);
         if (err != ZX_OK) {
             return;
         }
         if (!is_p2pdev) {
             brcmf_proto_add_if(drvr, ifp);
         }
         if (!drvr->fweh.evt_handler[BRCMF_E_IF])
             if (brcmf_net_attach(ifp, false) != ZX_OK) {
                 return;
             }
     }

     if (ifp && ifevent->action == BRCMF_E_IF_CHANGE) {
         brcmf_proto_reset_if(drvr, ifp);
     }

     err = brcmf_fweh_call_event_handler(ifp, emsg->event_code, emsg, data);

     if (ifp && ifevent->action == BRCMF_E_IF_DEL) {
         bool armed = brcmf_cfg80211_vif_event_armed(drvr->config);

         /* Default handling in case no-one waits for this event */
         if (!armed) {
             brcmf_remove_interface(ifp, false);
         }
     }
 }

 /**
  * brcmf_fweh_dequeue_event() - get event from the queue.
  *
  * @fweh: firmware event handling info.
  */
 static struct brcmf_fweh_queue_item* brcmf_fweh_dequeue_event(struct brcmf_fweh_info* fweh) {
     struct brcmf_fweh_queue_item* event = NULL;

     //spin_lock_irqsave(&fweh->evt_q_lock, flags);
     pthread_mutex_lock(&irq_callback_lock);
     if (!list_is_empty(&fweh->event_q)) {
         event = list_peek_head_type(&fweh->event_q, struct brcmf_fweh_queue_item, q);
         list_delete(&event->q);
     }
     //spin_unlock_irqrestore(&fweh->evt_q_lock, flags);
     pthread_mutex_unlock(&irq_callback_lock);

     return event;
 }

 /**
  * brcmf_fweh_event_worker() - firmware event worker.
  *
  * @work: worker object.
  */
 static void brcmf_fweh_event_worker(struct work_struct* work) {
     struct brcmf_pub* drvr;
     struct brcmf_if* ifp;
     struct brcmf_fweh_info* fweh;
     struct brcmf_fweh_queue_item* event;
     zx_status_t err = ZX_OK;
     struct brcmf_event_msg_be* emsg_be;
     struct brcmf_event_msg emsg;

     fweh = containerof(work, struct brcmf_fweh_info, event_work);
     drvr = containerof(fweh, struct brcmf_pub, fweh);

     while ((event = brcmf_fweh_dequeue_event(fweh))) {
         brcmf_dbg(EVENT, "event %s (%u) ifidx %u bsscfg %u addr %pM\n",
                   brcmf_fweh_event_name(event->code), event->code, event->emsg.ifidx,
                   event->emsg.bsscfgidx, event->emsg.addr);

         /* convert event message */
         emsg_be = &event->emsg;
         emsg.version = be16toh(emsg_be->version);
         emsg.flags = be16toh(emsg_be->flags);
         emsg.event_code = event->code;
         emsg.status = be32toh(emsg_be->status);
         emsg.reason = be32toh(emsg_be->reason);
         emsg.auth_type = be32toh(emsg_be->auth_type);
         emsg.datalen = be32toh(emsg_be->datalen);
         memcpy(emsg.addr, emsg_be->addr, ETH_ALEN);
         memcpy(emsg.ifname, emsg_be->ifname, sizeof(emsg.ifname));
         emsg.ifidx = emsg_be->ifidx;
         emsg.bsscfgidx = emsg_be->bsscfgidx;

         brcmf_dbg(EVENT, "  version %u flags %u status %u reason %u\n", emsg.version, emsg.flags,
                   emsg.status, emsg.reason);
         brcmf_dbg_hex_dump(BRCMF_EVENT_ON(), event->data, min_t(uint32_t, emsg.datalen, 64),
                            "event payload, len=%d\n", emsg.datalen);

         /* special handling of interface event */
         if (event->code == BRCMF_E_IF) {
             brcmf_fweh_handle_if_event(drvr, &emsg, event->data);
             goto event_free;
         }

         if (event->code == BRCMF_E_TDLS_PEER_EVENT) {
             ifp = drvr->iflist[0];
         } else {
             ifp = drvr->iflist[emsg.bsscfgidx];
         }
         err = brcmf_fweh_call_event_handler(ifp, event->code, &emsg, event->data);
         if (err != ZX_OK) {
             brcmf_err("event handler failed (%d)\n", event->code);
             err = ZX_OK;
         }
 event_free:
         free(event);
     }
 }

 /**
  * brcmf_fweh_p2pdev_setup() - P2P device setup ongoing (or not).
  *
  * @ifp: ifp on which setup is taking place or finished.
  * @ongoing: p2p device setup in progress (or not).
  */
 void brcmf_fweh_p2pdev_setup(struct brcmf_if* ifp, bool ongoing) {
     ifp->drvr->fweh.p2pdev_setup_ongoing = ongoing;
 }

 /**
  * brcmf_fweh_attach() - initialize firmware event handling.
  *
  * @drvr: driver information object.
  */
 void brcmf_fweh_attach(struct brcmf_pub* drvr) {
     struct brcmf_fweh_info* fweh = &drvr->fweh;
     workqueue_init_work(&fweh->event_work, brcmf_fweh_event_worker);
     //spin_lock_init(&fweh->evt_q_lock);
     list_initialize(&fweh->event_q);
 }

 /**
  * brcmf_fweh_detach() - cleanup firmware event handling.
  *
  * @drvr: driver information object.
  */
 void brcmf_fweh_detach(struct brcmf_pub* drvr) {
     struct brcmf_fweh_info* fweh = &drvr->fweh;
     struct brcmf_if* ifp = brcmf_get_ifp(drvr, 0);
     int8_t eventmask[BRCMF_EVENTING_MASK_LEN];

     if (ifp) {
         /* clear all events */
         memset(eventmask, 0, BRCMF_EVENTING_MASK_LEN);
         (void)brcmf_fil_iovar_data_set(ifp, "event_msgs", eventmask, BRCMF_EVENTING_MASK_LEN);
     }
     /* cancel the worker */
     workqueue_cancel_work(&fweh->event_work);
     WARN_ON(!list_is_empty(&fweh->event_q));
     memset(fweh->evt_handler, 0, sizeof(fweh->evt_handler));
 }

 /**
  * brcmf_fweh_register() - register handler for given event code.
  *
  * @drvr: driver information object.
  * @code: event code.
  * @handler: handler for the given event code.
  */
 zx_status_t brcmf_fweh_register(struct brcmf_pub* drvr, enum brcmf_fweh_event_code code,
                                 brcmf_fweh_handler_t handler) {
     if (drvr->fweh.evt_handler[code]) {
         brcmf_err("Exit: event code %d already registered\n", code);
         return ZX_ERR_ALREADY_EXISTS;
     }
     drvr->fweh.evt_handler[code] = handler;
     brcmf_dbg(TRACE, "Exit: event handler registered for %s\n", brcmf_fweh_event_name(code));
     return ZX_OK;
 }

 /**
  * brcmf_fweh_unregister() - remove handler for given code.
  *
  * @drvr: driver information object.
  * @code: event code.
  */
 void brcmf_fweh_unregister(struct brcmf_pub* drvr, enum brcmf_fweh_event_code code) {
     brcmf_dbg(TRACE, "event handler cleared for %s\n", brcmf_fweh_event_name(code));
     drvr->fweh.evt_handler[code] = NULL;
 }

 /**
  * brcmf_fweh_activate_events() - enables firmware events registered.
  *
  * @ifp: primary interface object.
  */
 zx_status_t brcmf_fweh_activate_events(struct brcmf_if* ifp) {
     int i;
     zx_status_t err;
     int8_t eventmask[BRCMF_EVENTING_MASK_LEN];

     memset(eventmask, 0, sizeof(eventmask));
     for (i = 0; i < BRCMF_E_LAST; i++) {
         if (ifp->drvr->fweh.evt_handler[i]) {
             brcmf_dbg(EVENT, "enable event %s\n", brcmf_fweh_event_name(i));
             setbit(eventmask, i);
         }
     }

     /* want to handle IF event as well */
     brcmf_dbg(EVENT, "enable event IF\n");
     setbit(eventmask, BRCMF_E_IF);

     err = brcmf_fil_iovar_data_set(ifp, "event_msgs", eventmask, BRCMF_EVENTING_MASK_LEN);
     if (err != ZX_OK) {
         brcmf_err("Set event_msgs error (%d)\n", err);
     }

     return err;
 }

 /**
  * brcmf_fweh_process_event() - process netbuf as firmware event.
  *
  * @drvr: driver information object.
  * @event_packet: event packet to process.
  *
  * If the packet buffer contains a firmware event message it will
  * dispatch the event to a registered handler (using worker).
  */
 void brcmf_fweh_process_event(struct brcmf_pub* drvr, struct brcmf_event* event_packet,
                               uint32_t packet_len) {
     enum brcmf_fweh_event_code code;
     struct brcmf_fweh_info* fweh = &drvr->fweh;
     struct brcmf_fweh_queue_item* event;
     void* data;
     uint32_t datalen;

     //brcmf_dbg(TEMP, "Enter");
     /* get event info */
     code = be32toh(event_packet->msg.event_type);
     datalen = be32toh(event_packet->msg.datalen);
     data = &event_packet[1];

     if (code >= BRCMF_E_LAST) {
         return;
     }

     if (code != BRCMF_E_IF && !fweh->evt_handler[code]) {
         brcmf_dbg(TEMP, "Event not found");
         return;
     }

     if (datalen > BRCMF_DCMD_MAXLEN || datalen + sizeof(*event_packet) > packet_len) {
         brcmf_dbg(TEMP, "Len, datalen %d, event_packet size %ld, packet_len %d", datalen,
                   sizeof(*event_packet), packet_len);
         return;
     }

     event = calloc(1, sizeof(*event) + datalen);
     if (!event) {
         return;
     }

     event->code = code;
     event->ifidx = event_packet->msg.ifidx;

     /* use memcpy to get aligned event message */
     memcpy(&event->emsg, &event_packet->msg, sizeof(event->emsg));
     memcpy(event->data, data, datalen);
     event->datalen = datalen;
     memcpy(event->ifaddr, event_packet->eth.h_dest, ETH_ALEN);

     //brcmf_dbg(TEMP, "Queueing event!");
     brcmf_fweh_queue_event(fweh, event);
 }
	/*
	* Copyright (c) 2012 Broadcom Corporation
	*
	* Permission to use, copy, modify, and/or distribute this software for any
	* purpose with or without fee is hereby granted, provided that the above
	* copyright notice and this permission notice appear in all copies.
	*
	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
	* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
	* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
	* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	*/

	#include "fweh.h"

	#include <threads.h>

	#include "brcmu_utils.h"
	#include "brcmu_wifi.h"
	#include "cfg80211.h"
	#include "core.h"
	#include "debug.h"
	#include "device.h"
	#include "fwil.h"
	#include "linuxisms.h"
	#include "proto.h"
	#include "workqueue.h"

	/**
	* struct brcmf_fweh_queue_item - event item on event queue.
	*
	* @q: list element for queuing.
	* @code: event code.
	* @ifidx: interface index related to this event.
	* @ifaddr: ethernet address for interface.
	* @emsg: common parameters of the firmware event message.
	* @data: event specific data part of the firmware event.
	*/
	struct brcmf_fweh_queue_item {
	struct list_node q;
	enum brcmf_fweh_event_code code;
	uint8_t ifidx;
	uint8_t ifaddr[ETH_ALEN];
	struct brcmf_event_msg_be emsg;
	uint32_t datalen;
	uint8_t data[0];
	};

	/**
	* struct brcmf_fweh_event_name - code, name mapping entry.
	*/
	struct brcmf_fweh_event_name {
	enum brcmf_fweh_event_code code;
	const char* name;
	};

	#ifdef DEBUG
	#define BRCMF_ENUM_DEF(id, val) {val, #id},

	/* array for mapping code to event name */
	static struct brcmf_fweh_event_name fweh_event_names[] = {BRCMF_FWEH_EVENT_ENUM_DEFLIST};
	#undef BRCMF_ENUM_DEF

	/**
	* brcmf_fweh_event_name() - returns name for given event code.
	*
	* @code: code to lookup.
	*/
	const char* brcmf_fweh_event_name(enum brcmf_fweh_event_code code) {
	int i;
	for (i = 0; i < (int)countof(fweh_event_names); i++) {
	if (fweh_event_names[i].code == code) {
	return fweh_event_names[i].name;
	}
	}
	return "unknown";
	}
	#else
	const char* brcmf_fweh_event_name(enum brcmf_fweh_event_code code) {
	return "nodebug";
	}
	#endif

	/**
	* brcmf_fweh_queue_event() - create and queue event.
	*
	* @fweh: firmware event handling info.
	* @event: event queue entry.
	*/
	static void brcmf_fweh_queue_event(struct brcmf_fweh_info* fweh,
	struct brcmf_fweh_queue_item* event) {
	//spin_lock_irqsave(&fweh->evt_q_lock, flags);
	pthread_mutex_lock(&irq_callback_lock);
	list_add_tail(&fweh->event_q, &event->q);
	//spin_unlock_irqrestore(&fweh->evt_q_lock, flags);
	pthread_mutex_unlock(&irq_callback_lock);
	workqueue_schedule_default(&fweh->event_work);
	}

	static zx_status_t brcmf_fweh_call_event_handler(struct brcmf_if* ifp,
	enum brcmf_fweh_event_code code,
	struct brcmf_event_msg* emsg, void* data) {
	struct brcmf_fweh_info* fweh;
	zx_status_t err = ZX_ERR_IO;

	if (ifp) {
	fweh = &ifp->drvr->fweh;

	/* handle the event if valid interface and handler */
	if (fweh->evt_handler[code]) {
	err = fweh->evt_handler[code](ifp, emsg, data);
	} else {
	brcmf_err("unhandled event %d ignored\n", code);
	}
	} else {
	brcmf_err("no interface object\n");
	}
	return err;
	}

	/**
	* brcmf_fweh_handle_if_event() - handle IF event.
	*
	* @drvr: driver information object.
	* @item: queue entry.
	* @ifpp: interface object (may change upon ADD action).
	*/
	static void brcmf_fweh_handle_if_event(struct brcmf_pub* drvr, struct brcmf_event_msg* emsg,
	void* data) {
	struct brcmf_if_event* ifevent = data;
	struct brcmf_if* ifp;
	bool is_p2pdev;
	zx_status_t err = ZX_OK;

	brcmf_dbg(EVENT, "action: %u ifidx: %u bsscfgidx: %u flags: %u role: %u\n", ifevent->action,
	ifevent->ifidx, ifevent->bsscfgidx, ifevent->flags, ifevent->role);

	/* The P2P Device interface event must not be ignored contrary to what
	* firmware tells us. Older firmware uses p2p noif, with sta role.
	* This should be accepted when p2pdev_setup is ongoing. TDLS setup will
	* use the same ifevent and should be ignored.
	*/
	is_p2pdev = ((ifevent->flags & BRCMF_E_IF_FLAG_NOIF) &&
	(ifevent->role == BRCMF_E_IF_ROLE_P2P_CLIENT \|\|
	((ifevent->role == BRCMF_E_IF_ROLE_STA) && (drvr->fweh.p2pdev_setup_ongoing))));
	if (!is_p2pdev && (ifevent->flags & BRCMF_E_IF_FLAG_NOIF)) {
	brcmf_dbg(EVENT, "event can be ignored\n");
	return;
	}
	if (ifevent->ifidx >= BRCMF_MAX_IFS) {
	brcmf_err("invalid interface index: %u\n", ifevent->ifidx);
	return;
	}

	ifp = drvr->iflist[ifevent->bsscfgidx];

	if (ifevent->action == BRCMF_E_IF_ADD) {
	brcmf_dbg(EVENT, "adding %s (%pM)\n", emsg->ifname, emsg->addr);
	err = brcmf_add_if(drvr, ifevent->bsscfgidx, ifevent->ifidx, is_p2pdev, emsg->ifname,
	emsg->addr, &ifp);
	if (err != ZX_OK) {
	return;
	}
	if (!is_p2pdev) {
	brcmf_proto_add_if(drvr, ifp);
	}
	if (!drvr->fweh.evt_handler[BRCMF_E_IF])
	if (brcmf_net_attach(ifp, false) != ZX_OK) {
	return;
	}
	}

	if (ifp && ifevent->action == BRCMF_E_IF_CHANGE) {
	brcmf_proto_reset_if(drvr, ifp);
	}

	err = brcmf_fweh_call_event_handler(ifp, emsg->event_code, emsg, data);

	if (ifp && ifevent->action == BRCMF_E_IF_DEL) {
	bool armed = brcmf_cfg80211_vif_event_armed(drvr->config);

	/* Default handling in case no-one waits for this event */
	if (!armed) {
	brcmf_remove_interface(ifp, false);
	}
	}
	}

	/**
	* brcmf_fweh_dequeue_event() - get event from the queue.
	*
	* @fweh: firmware event handling info.
	*/
	static struct brcmf_fweh_queue_item* brcmf_fweh_dequeue_event(struct brcmf_fweh_info* fweh) {
	struct brcmf_fweh_queue_item* event = NULL;

	//spin_lock_irqsave(&fweh->evt_q_lock, flags);
	pthread_mutex_lock(&irq_callback_lock);
	if (!list_is_empty(&fweh->event_q)) {
	event = list_peek_head_type(&fweh->event_q, struct brcmf_fweh_queue_item, q);
	list_delete(&event->q);
	}
	//spin_unlock_irqrestore(&fweh->evt_q_lock, flags);
	pthread_mutex_unlock(&irq_callback_lock);

	return event;
	}

	/**
	* brcmf_fweh_event_worker() - firmware event worker.
	*
	* @work: worker object.
	*/
	static void brcmf_fweh_event_worker(struct work_struct* work) {
	struct brcmf_pub* drvr;
	struct brcmf_if* ifp;
	struct brcmf_fweh_info* fweh;
	struct brcmf_fweh_queue_item* event;
	zx_status_t err = ZX_OK;
	struct brcmf_event_msg_be* emsg_be;
	struct brcmf_event_msg emsg;

	fweh = containerof(work, struct brcmf_fweh_info, event_work);
	drvr = containerof(fweh, struct brcmf_pub, fweh);

	while ((event = brcmf_fweh_dequeue_event(fweh))) {
	brcmf_dbg(EVENT, "event %s (%u) ifidx %u bsscfg %u addr %pM\n",
	brcmf_fweh_event_name(event->code), event->code, event->emsg.ifidx,
	event->emsg.bsscfgidx, event->emsg.addr);

	/* convert event message */
	emsg_be = &event->emsg;
	emsg.version = be16toh(emsg_be->version);
	emsg.flags = be16toh(emsg_be->flags);
	emsg.event_code = event->code;
	emsg.status = be32toh(emsg_be->status);
	emsg.reason = be32toh(emsg_be->reason);
	emsg.auth_type = be32toh(emsg_be->auth_type);
	emsg.datalen = be32toh(emsg_be->datalen);
	memcpy(emsg.addr, emsg_be->addr, ETH_ALEN);
	memcpy(emsg.ifname, emsg_be->ifname, sizeof(emsg.ifname));
	emsg.ifidx = emsg_be->ifidx;
	emsg.bsscfgidx = emsg_be->bsscfgidx;

	brcmf_dbg(EVENT, " version %u flags %u status %u reason %u\n", emsg.version, emsg.flags,
	emsg.status, emsg.reason);
	brcmf_dbg_hex_dump(BRCMF_EVENT_ON(), event->data, min_t(uint32_t, emsg.datalen, 64),
	"event payload, len=%d\n", emsg.datalen);

	/* special handling of interface event */
	if (event->code == BRCMF_E_IF) {
	brcmf_fweh_handle_if_event(drvr, &emsg, event->data);
	goto event_free;
	}

	if (event->code == BRCMF_E_TDLS_PEER_EVENT) {
	ifp = drvr->iflist[0];
	} else {
	ifp = drvr->iflist[emsg.bsscfgidx];
	}
	err = brcmf_fweh_call_event_handler(ifp, event->code, &emsg, event->data);
	if (err != ZX_OK) {
	brcmf_err("event handler failed (%d)\n", event->code);
	err = ZX_OK;
	}
	event_free:
	free(event);
	}
	}

	/**
	* brcmf_fweh_p2pdev_setup() - P2P device setup ongoing (or not).
	*
	* @ifp: ifp on which setup is taking place or finished.
	* @ongoing: p2p device setup in progress (or not).
	*/
	void brcmf_fweh_p2pdev_setup(struct brcmf_if* ifp, bool ongoing) {
	ifp->drvr->fweh.p2pdev_setup_ongoing = ongoing;
	}

	/**
	* brcmf_fweh_attach() - initialize firmware event handling.
	*
	* @drvr: driver information object.
	*/
	void brcmf_fweh_attach(struct brcmf_pub* drvr) {
	struct brcmf_fweh_info* fweh = &drvr->fweh;
	workqueue_init_work(&fweh->event_work, brcmf_fweh_event_worker);
	//spin_lock_init(&fweh->evt_q_lock);
	list_initialize(&fweh->event_q);
	}

	/**
	* brcmf_fweh_detach() - cleanup firmware event handling.
	*
	* @drvr: driver information object.
	*/
	void brcmf_fweh_detach(struct brcmf_pub* drvr) {
	struct brcmf_fweh_info* fweh = &drvr->fweh;
	struct brcmf_if* ifp = brcmf_get_ifp(drvr, 0);
	int8_t eventmask[BRCMF_EVENTING_MASK_LEN];

	if (ifp) {
	/* clear all events */
	memset(eventmask, 0, BRCMF_EVENTING_MASK_LEN);
	(void)brcmf_fil_iovar_data_set(ifp, "event_msgs", eventmask, BRCMF_EVENTING_MASK_LEN);
	}
	/* cancel the worker */
	workqueue_cancel_work(&fweh->event_work);
	WARN_ON(!list_is_empty(&fweh->event_q));
	memset(fweh->evt_handler, 0, sizeof(fweh->evt_handler));
	}

	/**
	* brcmf_fweh_register() - register handler for given event code.
	*
	* @drvr: driver information object.
	* @code: event code.
	* @handler: handler for the given event code.
	*/
	zx_status_t brcmf_fweh_register(struct brcmf_pub* drvr, enum brcmf_fweh_event_code code,
	brcmf_fweh_handler_t handler) {
	if (drvr->fweh.evt_handler[code]) {
	brcmf_err("Exit: event code %d already registered\n", code);
	return ZX_ERR_ALREADY_EXISTS;
	}
	drvr->fweh.evt_handler[code] = handler;
	brcmf_dbg(TRACE, "Exit: event handler registered for %s\n", brcmf_fweh_event_name(code));
	return ZX_OK;
	}

	/**
	* brcmf_fweh_unregister() - remove handler for given code.
	*
	* @drvr: driver information object.
	* @code: event code.
	*/
	void brcmf_fweh_unregister(struct brcmf_pub* drvr, enum brcmf_fweh_event_code code) {
	brcmf_dbg(TRACE, "event handler cleared for %s\n", brcmf_fweh_event_name(code));
	drvr->fweh.evt_handler[code] = NULL;
	}

	/**
	* brcmf_fweh_activate_events() - enables firmware events registered.
	*
	* @ifp: primary interface object.
	*/
	zx_status_t brcmf_fweh_activate_events(struct brcmf_if* ifp) {
	int i;
	zx_status_t err;
	int8_t eventmask[BRCMF_EVENTING_MASK_LEN];

	memset(eventmask, 0, sizeof(eventmask));
	for (i = 0; i < BRCMF_E_LAST; i++) {
	if (ifp->drvr->fweh.evt_handler[i]) {
	brcmf_dbg(EVENT, "enable event %s\n", brcmf_fweh_event_name(i));
	setbit(eventmask, i);
	}
	}

	/* want to handle IF event as well */
	brcmf_dbg(EVENT, "enable event IF\n");
	setbit(eventmask, BRCMF_E_IF);

	err = brcmf_fil_iovar_data_set(ifp, "event_msgs", eventmask, BRCMF_EVENTING_MASK_LEN);
	if (err != ZX_OK) {
	brcmf_err("Set event_msgs error (%d)\n", err);
	}

	return err;
	}

	/**
	* brcmf_fweh_process_event() - process netbuf as firmware event.
	*
	* @drvr: driver information object.
	* @event_packet: event packet to process.
	*
	* If the packet buffer contains a firmware event message it will
	* dispatch the event to a registered handler (using worker).
	*/
	void brcmf_fweh_process_event(struct brcmf_pub* drvr, struct brcmf_event* event_packet,
	uint32_t packet_len) {
	enum brcmf_fweh_event_code code;
	struct brcmf_fweh_info* fweh = &drvr->fweh;
	struct brcmf_fweh_queue_item* event;
	void* data;
	uint32_t datalen;

	//brcmf_dbg(TEMP, "Enter");
	/* get event info */
	code = be32toh(event_packet->msg.event_type);
	datalen = be32toh(event_packet->msg.datalen);
	data = &event_packet[1];

	if (code >= BRCMF_E_LAST) {
	return;
	}

	if (code != BRCMF_E_IF && !fweh->evt_handler[code]) {
	brcmf_dbg(TEMP, "Event not found");
	return;
	}

	if (datalen > BRCMF_DCMD_MAXLEN \|\| datalen + sizeof(*event_packet) > packet_len) {
	brcmf_dbg(TEMP, "Len, datalen %d, event_packet size %ld, packet_len %d", datalen,
	sizeof(*event_packet), packet_len);
	return;
	}

	event = calloc(1, sizeof(*event) + datalen);
	if (!event) {
	return;
	}

	event->code = code;
	event->ifidx = event_packet->msg.ifidx;

	/* use memcpy to get aligned event message */
	memcpy(&event->emsg, &event_packet->msg, sizeof(event->emsg));
	memcpy(event->data, data, datalen);
	event->datalen = datalen;
	memcpy(event->ifaddr, event_packet->eth.h_dest, ETH_ALEN);

	//brcmf_dbg(TEMP, "Queueing event!");
	brcmf_fweh_queue_event(fweh, event);
	}