[deliverable/linux.git] / drivers / net / wireless / brcm80211 / brcmfmac / fweh.c

/*
 * 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 <linux/netdevice.h>

#include "brcmu_wifi.h"
#include "brcmu_utils.h"

#include "dhd.h"
#include "dhd_dbg.h"
#include "tracepoint.h"
#include "fwsignal.h"
#include "fweh.h"
#include "fwil.h"

/**
 * struct brcm_ethhdr - broadcom specific ether header.
 *
 * @subtype: subtype for this packet.
 * @length: TODO: length of appended data.
 * @version: version indication.
 * @oui: OUI of this packet.
 * @usr_subtype: subtype for this OUI.
 */
struct brcm_ethhdr {
	__be16 subtype;
	__be16 length;
	u8 version;
	u8 oui[3];
	__be16 usr_subtype;
} __packed;

struct brcmf_event_msg_be {
	__be16 version;
	__be16 flags;
	__be32 event_type;
	__be32 status;
	__be32 reason;
	__be32 auth_type;
	__be32 datalen;
	u8 addr[ETH_ALEN];
	char ifname[IFNAMSIZ];
	u8 ifidx;
	u8 bsscfgidx;
} __packed;

/**
 * struct brcmf_event - contents of broadcom event packet.
 *
 * @eth: standard ether header.
 * @hdr: broadcom specific ether header.
 * @msg: common part of the actual event message.
 */
struct brcmf_event {
	struct ethhdr eth;
	struct brcm_ethhdr hdr;
	struct brcmf_event_msg_be msg;
} __packed;

/**
 * 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_head q;
	enum brcmf_fweh_event_code code;
	u8 ifidx;
	u8 ifaddr[ETH_ALEN];
	struct brcmf_event_msg_be emsg;
	u8 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.
 */
static const char *brcmf_fweh_event_name(enum brcmf_fweh_event_code code)
{
	int i;
	for (i = 0; i < ARRAY_SIZE(fweh_event_names); i++) {
		if (fweh_event_names[i].code == code)
			return fweh_event_names[i].name;
	}
	return "unknown";
}
#else
static 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)
{
	ulong flags;

	spin_lock_irqsave(&fweh->evt_q_lock, flags);
	list_add_tail(&event->q, &fweh->event_q);
	spin_unlock_irqrestore(&fweh->evt_q_lock, flags);
	schedule_work(&fweh->event_work);
}

static int 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;
	int err = -EINVAL;

	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;
	int err = 0;

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

	if (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->bssidx];

	if (ifevent->action == BRCMF_E_IF_ADD) {
		brcmf_dbg(EVENT, "adding %s (%pM)\n", emsg->ifname,
			  emsg->addr);
		ifp = brcmf_add_if(drvr, ifevent->bssidx, ifevent->ifidx,
				   emsg->ifname, emsg->addr);
		if (IS_ERR(ifp))
			return;
		brcmf_fws_add_interface(ifp);
		if (!drvr->fweh.evt_handler[BRCMF_E_IF])
			if (brcmf_net_attach(ifp, false) < 0)
				return;
	}

	if (ifevent->action == BRCMF_E_IF_CHANGE)
		brcmf_fws_reset_interface(ifp);

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

	if (ifevent->action == BRCMF_E_IF_DEL) {
		brcmf_fws_del_interface(ifp);
		brcmf_del_if(drvr, ifevent->bssidx);
	}
}

/**
 * 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;
	ulong flags;

	spin_lock_irqsave(&fweh->evt_q_lock, flags);
	if (!list_empty(&fweh->event_q)) {
		event = list_first_entry(&fweh->event_q,
					 struct brcmf_fweh_queue_item, q);
		list_del(&event->q);
	}
	spin_unlock_irqrestore(&fweh->evt_q_lock, flags);

	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;
	int err = 0;
	struct brcmf_event_msg_be *emsg_be;
	struct brcmf_event_msg emsg;

	fweh = container_of(work, struct brcmf_fweh_info, event_work);
	drvr = container_of(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 = be16_to_cpu(emsg_be->version);
		emsg.flags = be16_to_cpu(emsg_be->flags);
		emsg.event_code = event->code;
		emsg.status = be32_to_cpu(emsg_be->status);
		emsg.reason = be32_to_cpu(emsg_be->reason);
		emsg.auth_type = be32_to_cpu(emsg_be->auth_type);
		emsg.datalen = be32_to_cpu(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(u32, 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;
		}

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

/**
 * 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;
	INIT_WORK(&fweh->event_work, brcmf_fweh_event_worker);
	spin_lock_init(&fweh->evt_q_lock);
	INIT_LIST_HEAD(&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 = drvr->iflist[0];
	s8 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 */
	cancel_work_sync(&fweh->event_work);
	WARN_ON(!list_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.
 */
int 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("event code %d already registered\n", code);
		return -ENOSPC;
	}
	drvr->fweh.evt_handler[code] = handler;
	brcmf_dbg(TRACE, "event handler registered for %s\n",
		  brcmf_fweh_event_name(code));
	return 0;
}

/**
 * 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.
 */
int brcmf_fweh_activate_events(struct brcmf_if *ifp)
{
	int i, err;
	s8 eventmask[BRCMF_EVENTING_MASK_LEN];

	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)
		brcmf_err("Set event_msgs error (%d)\n", err);

	return err;
}

/**
 * brcmf_fweh_process_event() - process skb 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)
{
	enum brcmf_fweh_event_code code;
	struct brcmf_fweh_info *fweh = &drvr->fweh;
	struct brcmf_fweh_queue_item *event;
	gfp_t alloc_flag = GFP_KERNEL;
	void *data;
	u32 datalen;

	/* get event info */
	code = get_unaligned_be32(&event_packet->msg.event_type);
	datalen = get_unaligned_be32(&event_packet->msg.datalen);
	data = &event_packet[1];

	if (code >= BRCMF_E_LAST)
		return;

	if (code != BRCMF_E_IF && !fweh->evt_handler[code])
		return;

	if (in_interrupt())
		alloc_flag = GFP_ATOMIC;

	event = kzalloc(sizeof(*event) + datalen, alloc_flag);
	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);
	memcpy(event->ifaddr, event_packet->eth.h_dest, ETH_ALEN);

	brcmf_fweh_queue_event(fweh, event);
}
Commit	Line	Data
5c36b99a AS	1	/*
	2	* Copyright (c) 2012 Broadcom Corporation
	3	*
	4	* Permission to use, copy, modify, and/or distribute this software for any
	5	* purpose with or without fee is hereby granted, provided that the above
	6	* copyright notice and this permission notice appear in all copies.
	7	*
	8	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	9	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	10	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
	11	* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	12	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
	13	* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
	14	* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	15	*/
	16	#include <linux/netdevice.h>
	17
5c36b99a AS	18	#include "brcmu_wifi.h"
	19	#include "brcmu_utils.h"
	20
	21	#include "dhd.h"
	22	#include "dhd_dbg.h"
40c1c249	23	#include "tracepoint.h"
bb8c8063	24	#include "fwsignal.h"
5c36b99a AS	25	#include "fweh.h"
	26	#include "fwil.h"
	27
	28	/**
	29	* struct brcm_ethhdr - broadcom specific ether header.
	30	*
	31	* @subtype: subtype for this packet.
	32	* @length: TODO: length of appended data.
	33	* @version: version indication.
	34	* @oui: OUI of this packet.
	35	* @usr_subtype: subtype for this OUI.
	36	*/
	37	struct brcm_ethhdr {
	38	__be16 subtype;
	39	__be16 length;
	40	u8 version;
	41	u8 oui[3];
	42	__be16 usr_subtype;
	43	} __packed;
	44
	45	struct brcmf_event_msg_be {
	46	__be16 version;
	47	__be16 flags;
	48	__be32 event_type;
	49	__be32 status;
	50	__be32 reason;
	51	__be32 auth_type;
	52	__be32 datalen;
	53	u8 addr[ETH_ALEN];
	54	char ifname[IFNAMSIZ];
	55	u8 ifidx;
	56	u8 bsscfgidx;
	57	} __packed;
	58
	59	/**
	60	* struct brcmf_event - contents of broadcom event packet.
	61	*
	62	* @eth: standard ether header.
	63	* @hdr: broadcom specific ether header.
	64	* @msg: common part of the actual event message.
	65	*/
	66	struct brcmf_event {
	67	struct ethhdr eth;
	68	struct brcm_ethhdr hdr;
	69	struct brcmf_event_msg_be msg;
	70	} __packed;
	71
	72	/**
	73	* struct brcmf_fweh_queue_item - event item on event queue.
	74	*
	75	* @q: list element for queuing.
	76	* @code: event code.
	77	* @ifidx: interface index related to this event.
	78	* @ifaddr: ethernet address for interface.
	79	* @emsg: common parameters of the firmware event message.
	80	* @data: event specific data part of the firmware event.
	81	*/
	82	struct brcmf_fweh_queue_item {
	83	struct list_head q;
	84	enum brcmf_fweh_event_code code;
	85	u8 ifidx;
	86	u8 ifaddr[ETH_ALEN];
	87	struct brcmf_event_msg_be emsg;
	88	u8 data[0];
89	};
90
91	/**
92	* struct brcmf_fweh_event_name - code, name mapping entry.
93	*/
94	struct brcmf_fweh_event_name {
95	enum brcmf_fweh_event_code code;
96	const char *name;
97	};
98
99	#ifdef DEBUG
dc5cbdfd AS	100	#define BRCMF_ENUM_DEF(id, val) \
	101	{ val, #id },
	102
5c36b99a AS	103	/* array for mapping code to event name */
5c36b99a AS	104	static struct brcmf_fweh_event_name fweh_event_names[] = {
dc5cbdfd	105	BRCMF_FWEH_EVENT_ENUM_DEFLIST
5c36b99a	106	};
dc5cbdfd	107	#undef BRCMF_ENUM_DEF
5c36b99a AS	108
	109	/**
	110	* brcmf_fweh_event_name() - returns name for given event code.
	111	*
	112	* @code: code to lookup.
	113	*/
	114	static const char *brcmf_fweh_event_name(enum brcmf_fweh_event_code code)
	115	{
	116	int i;
	117	for (i = 0; i < ARRAY_SIZE(fweh_event_names); i++) {
	118	if (fweh_event_names[i].code == code)
	119	return fweh_event_names[i].name;
	120	}
	121	return "unknown";
	122	}
	123	#else
	124	static const char *brcmf_fweh_event_name(enum brcmf_fweh_event_code code)
	125	{
	126	return "nodebug";
	127	}
	128	#endif
	129
	130	/**
	131	* brcmf_fweh_queue_event() - create and queue event.
	132	*
607d5c0e AS	133	* @fweh: firmware event handling info.
607d5c0e AS	134	* @event: event queue entry.
5c36b99a	135	*/
607d5c0e AS	136	static void brcmf_fweh_queue_event(struct brcmf_fweh_info *fweh,
607d5c0e AS	137	struct brcmf_fweh_queue_item *event)
5c36b99a	138	{
5c36b99a	139	ulong flags;
5c36b99a AS	140
	141	spin_lock_irqsave(&fweh->evt_q_lock, flags);
	142	list_add_tail(&event->q, &fweh->event_q);
	143	spin_unlock_irqrestore(&fweh->evt_q_lock, flags);
	144	schedule_work(&fweh->event_work);
	145	}
	146
3e0a97e1 AS	147	static int brcmf_fweh_call_event_handler(struct brcmf_if *ifp,
	148	enum brcmf_fweh_event_code code,
	149	struct brcmf_event_msg *emsg,
	150	void *data)
	151	{
	152	struct brcmf_fweh_info *fweh;
	153	int err = -EINVAL;
	154
	155	if (ifp) {
	156	fweh = &ifp->drvr->fweh;
	157
	158	/* handle the event if valid interface and handler */
5857f9c6	159	if (fweh->evt_handler[code])
3e0a97e1 AS	160	err = fweh->evt_handler[code](ifp, emsg, data);
3e0a97e1 AS	161	else
5e8149f5	162	brcmf_err("unhandled event %d ignored\n", code);
3e0a97e1	163	} else {
5e8149f5	164	brcmf_err("no interface object\n");
3e0a97e1 AS	165	}
	166	return err;
	167	}
	168
5c36b99a	169	/**
3e0a97e1	170	* brcmf_fweh_handle_if_event() - handle IF event.
5c36b99a AS	171	*
	172	* @drvr: driver information object.
	173	* @item: queue entry.
	174	* @ifpp: interface object (may change upon ADD action).
	175	*/
3e0a97e1 AS	176	static void brcmf_fweh_handle_if_event(struct brcmf_pub *drvr,
	177	struct brcmf_event_msg *emsg,
	178	void *data)
5c36b99a	179	{
3e0a97e1	180	struct brcmf_if_event *ifevent = data;
5c36b99a AS	181	struct brcmf_if *ifp;
	182	int err = 0;
	183
8fdd1578 AS	184	brcmf_dbg(EVENT, "action: %u idx: %u bsscfg: %u flags: %u role: %u\n",
	185	ifevent->action, ifevent->ifidx, ifevent->bssidx,
	186	ifevent->flags, ifevent->role);
5c36b99a	187
2ee8382f AS	188	if (ifevent->flags & BRCMF_E_IF_FLAG_NOIF) {
	189	brcmf_dbg(EVENT, "event can be ignored\n");
	190	return;
	191	}
5c36b99a	192	if (ifevent->ifidx >= BRCMF_MAX_IFS) {
5e8149f5	193	brcmf_err("invalid interface index: %u\n",
5c36b99a	194	ifevent->ifidx);
3e0a97e1	195	return;
5c36b99a AS	196	}
5c36b99a AS	197
2880b868	198	ifp = drvr->iflist[ifevent->bssidx];
3e0a97e1 AS	199
	200	if (ifevent->action == BRCMF_E_IF_ADD) {
	201	brcmf_dbg(EVENT, "adding %s (%pM)\n", emsg->ifname,
	202	emsg->addr);
2880b868	203	ifp = brcmf_add_if(drvr, ifevent->bssidx, ifevent->ifidx,
3e0a97e1 AS	204	emsg->ifname, emsg->addr);
	205	if (IS_ERR(ifp))
	206	return;
bb8c8063	207	brcmf_fws_add_interface(ifp);
3e0a97e1	208	if (!drvr->fweh.evt_handler[BRCMF_E_IF])
9390ace9 AS	209	if (brcmf_net_attach(ifp, false) < 0)
9390ace9 AS	210	return;
5c36b99a	211	}
3e0a97e1	212
bb8c8063 AS	213	if (ifevent->action == BRCMF_E_IF_CHANGE)
	214	brcmf_fws_reset_interface(ifp);
	215
3e0a97e1 AS	216	err = brcmf_fweh_call_event_handler(ifp, emsg->event_code, emsg, data);
3e0a97e1 AS	217
bb8c8063 AS	218	if (ifevent->action == BRCMF_E_IF_DEL) {
bb8c8063 AS	219	brcmf_fws_del_interface(ifp);
2880b868	220	brcmf_del_if(drvr, ifevent->bssidx);
bb8c8063	221	}
5c36b99a AS	222	}
	223
	224	/**
	225	* brcmf_fweh_dequeue_event() - get event from the queue.
	226	*
	227	* @fweh: firmware event handling info.
	228	*/
	229	static struct brcmf_fweh_queue_item *
	230	brcmf_fweh_dequeue_event(struct brcmf_fweh_info *fweh)
	231	{
	232	struct brcmf_fweh_queue_item *event = NULL;
	233	ulong flags;
	234
	235	spin_lock_irqsave(&fweh->evt_q_lock, flags);
	236	if (!list_empty(&fweh->event_q)) {
	237	event = list_first_entry(&fweh->event_q,
	238	struct brcmf_fweh_queue_item, q);
	239	list_del(&event->q);
	240	}
	241	spin_unlock_irqrestore(&fweh->evt_q_lock, flags);
	242
	243	return event;
	244	}
	245
	246	/**
	247	* brcmf_fweh_event_worker() - firmware event worker.
	248	*
	249	* @work: worker object.
	250	*/
	251	static void brcmf_fweh_event_worker(struct work_struct *work)
	252	{
	253	struct brcmf_pub *drvr;
	254	struct brcmf_if *ifp;
	255	struct brcmf_fweh_info *fweh;
	256	struct brcmf_fweh_queue_item *event;
	257	int err = 0;
	258	struct brcmf_event_msg_be *emsg_be;
	259	struct brcmf_event_msg emsg;
	260
	261	fweh = container_of(work, struct brcmf_fweh_info, event_work);
	262	drvr = container_of(fweh, struct brcmf_pub, fweh);
	263
	264	while ((event = brcmf_fweh_dequeue_event(fweh))) {
1b4e027e	265	brcmf_dbg(EVENT, "event %s (%u) ifidx %u bsscfg %u addr %pM\n",
5c36b99a AS	266	brcmf_fweh_event_name(event->code), event->code,
	267	event->emsg.ifidx, event->emsg.bsscfgidx,
	268	event->emsg.addr);
	269
5c36b99a AS	270	/* convert event message */
	271	emsg_be = &event->emsg;
	272	emsg.version = be16_to_cpu(emsg_be->version);
	273	emsg.flags = be16_to_cpu(emsg_be->flags);
	274	emsg.event_code = event->code;
	275	emsg.status = be32_to_cpu(emsg_be->status);
	276	emsg.reason = be32_to_cpu(emsg_be->reason);
	277	emsg.auth_type = be32_to_cpu(emsg_be->auth_type);
	278	emsg.datalen = be32_to_cpu(emsg_be->datalen);
	279	memcpy(emsg.addr, emsg_be->addr, ETH_ALEN);
	280	memcpy(emsg.ifname, emsg_be->ifname, sizeof(emsg.ifname));
	281	emsg.ifidx = emsg_be->ifidx;
	282	emsg.bsscfgidx = emsg_be->bsscfgidx;
	283
	284	brcmf_dbg(EVENT, " version %u flags %u status %u reason %u\n",
	285	emsg.version, emsg.flags, emsg.status, emsg.reason);
	286	brcmf_dbg_hex_dump(BRCMF_EVENT_ON(), event->data,
	287	min_t(u32, emsg.datalen, 64),
1b4e027e	288	"event payload, len=%d\n", emsg.datalen);
5c36b99a	289
3e0a97e1 AS	290	/* special handling of interface event */
	291	if (event->code == BRCMF_E_IF) {
	292	brcmf_fweh_handle_if_event(drvr, &emsg, event->data);
	293	goto event_free;
	294	}
	295
2880b868	296	ifp = drvr->iflist[emsg.bsscfgidx];
3e0a97e1 AS	297	err = brcmf_fweh_call_event_handler(ifp, event->code, &emsg,
3e0a97e1 AS	298	event->data);
5c36b99a	299	if (err) {
5e8149f5	300	brcmf_err("event handler failed (%d)\n",
5c36b99a AS	301	event->code);
	302	err = 0;
	303	}
	304	event_free:
	305	kfree(event);
	306	}
	307	}
	308
	309	/**
	310	* brcmf_fweh_attach() - initialize firmware event handling.
	311	*
	312	* @drvr: driver information object.
	313	*/
	314	void brcmf_fweh_attach(struct brcmf_pub *drvr)
	315	{
	316	struct brcmf_fweh_info *fweh = &drvr->fweh;
	317	INIT_WORK(&fweh->event_work, brcmf_fweh_event_worker);
	318	spin_lock_init(&fweh->evt_q_lock);
	319	INIT_LIST_HEAD(&fweh->event_q);
	320	}
	321
	322	/**
	323	* brcmf_fweh_detach() - cleanup firmware event handling.
	324	*
	325	* @drvr: driver information object.
	326	*/
	327	void brcmf_fweh_detach(struct brcmf_pub *drvr)
	328	{
	329	struct brcmf_fweh_info *fweh = &drvr->fweh;
	330	struct brcmf_if *ifp = drvr->iflist[0];
	331	s8 eventmask[BRCMF_EVENTING_MASK_LEN];
	332
df19e777 HM	333	if (ifp) {
	334	/* clear all events */
	335	memset(eventmask, 0, BRCMF_EVENTING_MASK_LEN);
	336	(void)brcmf_fil_iovar_data_set(ifp, "event_msgs",
	337	eventmask,
	338	BRCMF_EVENTING_MASK_LEN);
	339	}
5c36b99a AS	340	/* cancel the worker */
	341	cancel_work_sync(&fweh->event_work);
	342	WARN_ON(!list_empty(&fweh->event_q));
	343	memset(fweh->evt_handler, 0, sizeof(fweh->evt_handler));
	344	}
	345
	346	/**
	347	* brcmf_fweh_register() - register handler for given event code.
	348	*
	349	* @drvr: driver information object.
	350	* @code: event code.
	351	* @handler: handler for the given event code.
	352	*/
	353	int brcmf_fweh_register(struct brcmf_pub *drvr, enum brcmf_fweh_event_code code,
	354	brcmf_fweh_handler_t handler)
	355	{
	356	if (drvr->fweh.evt_handler[code]) {
5e8149f5	357	brcmf_err("event code %d already registered\n", code);
5c36b99a AS	358	return -ENOSPC;
	359	}
	360	drvr->fweh.evt_handler[code] = handler;
b522dd80 AS	361	brcmf_dbg(TRACE, "event handler registered for %s\n",
b522dd80 AS	362	brcmf_fweh_event_name(code));
5c36b99a AS	363	return 0;
	364	}
	365
	366	/**
	367	* brcmf_fweh_unregister() - remove handler for given code.
	368	*
	369	* @drvr: driver information object.
	370	* @code: event code.
	371	*/
	372	void brcmf_fweh_unregister(struct brcmf_pub *drvr,
	373	enum brcmf_fweh_event_code code)
	374	{
b522dd80 AS	375	brcmf_dbg(TRACE, "event handler cleared for %s\n",
b522dd80 AS	376	brcmf_fweh_event_name(code));
5c36b99a AS	377	drvr->fweh.evt_handler[code] = NULL;
	378	}
	379
	380	/**
	381	* brcmf_fweh_activate_events() - enables firmware events registered.
	382	*
	383	* @ifp: primary interface object.
	384	*/
	385	int brcmf_fweh_activate_events(struct brcmf_if *ifp)
	386	{
	387	int i, err;
	388	s8 eventmask[BRCMF_EVENTING_MASK_LEN];
	389
	390	for (i = 0; i < BRCMF_E_LAST; i++) {
	391	if (ifp->drvr->fweh.evt_handler[i]) {
	392	brcmf_dbg(EVENT, "enable event %s\n",
	393	brcmf_fweh_event_name(i));
	394	setbit(eventmask, i);
	395	}
	396	}
	397
	398	/* want to handle IF event as well */
b522dd80	399	brcmf_dbg(EVENT, "enable event IF\n");
5c36b99a AS	400	setbit(eventmask, BRCMF_E_IF);
	401
	402	err = brcmf_fil_iovar_data_set(ifp, "event_msgs",
	403	eventmask, BRCMF_EVENTING_MASK_LEN);
	404	if (err)
5e8149f5	405	brcmf_err("Set event_msgs error (%d)\n", err);
5c36b99a AS	406
	407	return err;
	408	}
	409
	410	/**
	411	* brcmf_fweh_process_event() - process skb as firmware event.
	412	*
	413	* @drvr: driver information object.
	414	* @event_packet: event packet to process.
5c36b99a AS	415	*
	416	* If the packet buffer contains a firmware event message it will
	417	* dispatch the event to a registered handler (using worker).
	418	*/
	419	void brcmf_fweh_process_event(struct brcmf_pub *drvr,
deb09280	420	struct brcmf_event *event_packet)
5c36b99a AS	421	{
5c36b99a AS	422	enum brcmf_fweh_event_code code;
607d5c0e AS	423	struct brcmf_fweh_info *fweh = &drvr->fweh;
	424	struct brcmf_fweh_queue_item *event;
	425	gfp_t alloc_flag = GFP_KERNEL;
	426	void *data;
	427	u32 datalen;
5c36b99a	428
607d5c0e	429	/* get event info */
5c36b99a	430	code = get_unaligned_be32(&event_packet->msg.event_type);
607d5c0e	431	datalen = get_unaligned_be32(&event_packet->msg.datalen);
607d5c0e AS	432	data = &event_packet[1];
607d5c0e AS	433
3e0a97e1 AS	434	if (code >= BRCMF_E_LAST)
	435	return;
	436
	437	if (code != BRCMF_E_IF && !fweh->evt_handler[code])
607d5c0e	438	return;
607d5c0e AS	439
	440	if (in_interrupt())
	441	alloc_flag = GFP_ATOMIC;
	442
	443	event = kzalloc(sizeof(*event) + datalen, alloc_flag);
5b15d0f4 JL	444	if (!event)
	445	return;
	446
607d5c0e	447	event->code = code;
deb09280	448	event->ifidx = event_packet->msg.ifidx;
607d5c0e AS	449
	450	/* use memcpy to get aligned event message */
	451	memcpy(&event->emsg, &event_packet->msg, sizeof(event->emsg));
	452	memcpy(event->data, data, datalen);
	453	memcpy(event->ifaddr, event_packet->eth.h_dest, ETH_ALEN);
5c36b99a	454
607d5c0e	455	brcmf_fweh_queue_event(fweh, event);
5c36b99a	456	}