[deliverable/linux.git] / drivers / net / wireless / broadcom / 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 "core.h"
#include "debug.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;
	bool is_p2pdev;
	int err = 0;

	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);
		ifp = brcmf_add_if(drvr, ifevent->bsscfgidx, ifevent->ifidx,
				   is_p2pdev, emsg->ifname, emsg->addr);
		if (IS_ERR(ifp))
			return;
		if (!is_p2pdev)
			brcmf_fws_add_interface(ifp);
		if (!drvr->fweh.evt_handler[BRCMF_E_IF])
			if (brcmf_net_attach(ifp, false) < 0)
				return;
	}

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

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

	if (ifp && ifevent->action == BRCMF_E_IF_DEL)
		brcmf_remove_interface(ifp);
}

/**
 * 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;
		}

		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) {
			brcmf_err("event handler failed (%d)\n",
				  event->code);
			err = 0;
		}
event_free:
		kfree(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;
	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 = brcmf_get_ifp(drvr, 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
122d3d04	21	#include "core.h"
a8e8ed34	22	#include "debug.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	181	struct brcmf_if *ifp;
ddddfed2	182	bool is_p2pdev;
5c36b99a AS	183	int err = 0;
5c36b99a AS	184
37a869ec HM	185	brcmf_dbg(EVENT, "action: %u ifidx: %u bsscfgidx: %u flags: %u role: %u\n",
37a869ec HM	186	ifevent->action, ifevent->ifidx, ifevent->bsscfgidx,
8fdd1578	187	ifevent->flags, ifevent->role);
5c36b99a	188
35a3cbcc HM	189	/* The P2P Device interface event must not be ignored contrary to what
35a3cbcc HM	190	* firmware tells us. Older firmware uses p2p noif, with sta role.
cb8dc71f HM	191	* This should be accepted when p2pdev_setup is ongoing. TDLS setup will
cb8dc71f HM	192	* use the same ifevent and should be ignored.
87c47903	193	*/
35a3cbcc HM	194	is_p2pdev = ((ifevent->flags & BRCMF_E_IF_FLAG_NOIF) &&
35a3cbcc HM	195	(ifevent->role == BRCMF_E_IF_ROLE_P2P_CLIENT \|\|
cb8dc71f HM	196	((ifevent->role == BRCMF_E_IF_ROLE_STA) &&
cb8dc71f HM	197	(drvr->fweh.p2pdev_setup_ongoing))));
ddddfed2	198	if (!is_p2pdev && (ifevent->flags & BRCMF_E_IF_FLAG_NOIF)) {
2ee8382f AS	199	brcmf_dbg(EVENT, "event can be ignored\n");
	200	return;
	201	}
5c36b99a	202	if (ifevent->ifidx >= BRCMF_MAX_IFS) {
ddddfed2	203	brcmf_err("invalid interface index: %u\n", ifevent->ifidx);
3e0a97e1	204	return;
5c36b99a AS	205	}
5c36b99a AS	206
37a869ec	207	ifp = drvr->iflist[ifevent->bsscfgidx];
3e0a97e1 AS	208
	209	if (ifevent->action == BRCMF_E_IF_ADD) {
	210	brcmf_dbg(EVENT, "adding %s (%pM)\n", emsg->ifname,
	211	emsg->addr);
37a869ec	212	ifp = brcmf_add_if(drvr, ifevent->bsscfgidx, ifevent->ifidx,
ddddfed2	213	is_p2pdev, emsg->ifname, emsg->addr);
3e0a97e1 AS	214	if (IS_ERR(ifp))
3e0a97e1 AS	215	return;
2b76acdb HM	216	if (!is_p2pdev)
2b76acdb HM	217	brcmf_fws_add_interface(ifp);
3e0a97e1	218	if (!drvr->fweh.evt_handler[BRCMF_E_IF])
9390ace9 AS	219	if (brcmf_net_attach(ifp, false) < 0)
9390ace9 AS	220	return;
5c36b99a	221	}
3e0a97e1	222
87c47903	223	if (ifp && ifevent->action == BRCMF_E_IF_CHANGE)
bb8c8063 AS	224	brcmf_fws_reset_interface(ifp);
bb8c8063 AS	225
3e0a97e1 AS	226	err = brcmf_fweh_call_event_handler(ifp, emsg->event_code, emsg, data);
3e0a97e1 AS	227
a44aa400	228	if (ifp && ifevent->action == BRCMF_E_IF_DEL)
ee6e3a34	229	brcmf_remove_interface(ifp);
5c36b99a AS	230	}
	231
	232	/**
	233	* brcmf_fweh_dequeue_event() - get event from the queue.
	234	*
	235	* @fweh: firmware event handling info.
	236	*/
	237	static struct brcmf_fweh_queue_item *
	238	brcmf_fweh_dequeue_event(struct brcmf_fweh_info *fweh)
	239	{
	240	struct brcmf_fweh_queue_item *event = NULL;
	241	ulong flags;
	242
	243	spin_lock_irqsave(&fweh->evt_q_lock, flags);
	244	if (!list_empty(&fweh->event_q)) {
	245	event = list_first_entry(&fweh->event_q,
	246	struct brcmf_fweh_queue_item, q);
	247	list_del(&event->q);
	248	}
	249	spin_unlock_irqrestore(&fweh->evt_q_lock, flags);
	250
	251	return event;
	252	}
	253
	254	/**
	255	* brcmf_fweh_event_worker() - firmware event worker.
	256	*
	257	* @work: worker object.
	258	*/
	259	static void brcmf_fweh_event_worker(struct work_struct *work)
	260	{
	261	struct brcmf_pub *drvr;
	262	struct brcmf_if *ifp;
	263	struct brcmf_fweh_info *fweh;
	264	struct brcmf_fweh_queue_item *event;
	265	int err = 0;
	266	struct brcmf_event_msg_be *emsg_be;
	267	struct brcmf_event_msg emsg;
	268
	269	fweh = container_of(work, struct brcmf_fweh_info, event_work);
	270	drvr = container_of(fweh, struct brcmf_pub, fweh);
	271
	272	while ((event = brcmf_fweh_dequeue_event(fweh))) {
1b4e027e	273	brcmf_dbg(EVENT, "event %s (%u) ifidx %u bsscfg %u addr %pM\n",
5c36b99a AS	274	brcmf_fweh_event_name(event->code), event->code,
	275	event->emsg.ifidx, event->emsg.bsscfgidx,
	276	event->emsg.addr);
	277
5c36b99a AS	278	/* convert event message */
	279	emsg_be = &event->emsg;
	280	emsg.version = be16_to_cpu(emsg_be->version);
	281	emsg.flags = be16_to_cpu(emsg_be->flags);
	282	emsg.event_code = event->code;
	283	emsg.status = be32_to_cpu(emsg_be->status);
	284	emsg.reason = be32_to_cpu(emsg_be->reason);
	285	emsg.auth_type = be32_to_cpu(emsg_be->auth_type);
	286	emsg.datalen = be32_to_cpu(emsg_be->datalen);
	287	memcpy(emsg.addr, emsg_be->addr, ETH_ALEN);
	288	memcpy(emsg.ifname, emsg_be->ifname, sizeof(emsg.ifname));
	289	emsg.ifidx = emsg_be->ifidx;
	290	emsg.bsscfgidx = emsg_be->bsscfgidx;
	291
	292	brcmf_dbg(EVENT, " version %u flags %u status %u reason %u\n",
	293	emsg.version, emsg.flags, emsg.status, emsg.reason);
	294	brcmf_dbg_hex_dump(BRCMF_EVENT_ON(), event->data,
	295	min_t(u32, emsg.datalen, 64),
1b4e027e	296	"event payload, len=%d\n", emsg.datalen);
5c36b99a	297
3e0a97e1 AS	298	/* special handling of interface event */
	299	if (event->code == BRCMF_E_IF) {
	300	brcmf_fweh_handle_if_event(drvr, &emsg, event->data);
	301	goto event_free;
	302	}
	303
29b93c0e	304	if (event->code == BRCMF_E_TDLS_PEER_EVENT)
70b7d94b HM	305	ifp = drvr->iflist[0];
	306	else
	307	ifp = drvr->iflist[emsg.bsscfgidx];
3e0a97e1 AS	308	err = brcmf_fweh_call_event_handler(ifp, event->code, &emsg,
3e0a97e1 AS	309	event->data);
5c36b99a	310	if (err) {
5e8149f5	311	brcmf_err("event handler failed (%d)\n",
5c36b99a AS	312	event->code);
	313	err = 0;
	314	}
	315	event_free:
	316	kfree(event);
	317	}
	318	}
	319
cb8dc71f HM	320	/**
	321	* brcmf_fweh_p2pdev_setup() - P2P device setup ongoing (or not).
	322	*
	323	* @ifp: ifp on which setup is taking place or finished.
	324	* @ongoing: p2p device setup in progress (or not).
	325	*/
	326	void brcmf_fweh_p2pdev_setup(struct brcmf_if *ifp, bool ongoing)
	327	{
	328	ifp->drvr->fweh.p2pdev_setup_ongoing = ongoing;
	329	}
	330
5c36b99a AS	331	/**
	332	* brcmf_fweh_attach() - initialize firmware event handling.
	333	*
	334	* @drvr: driver information object.
	335	*/
	336	void brcmf_fweh_attach(struct brcmf_pub *drvr)
	337	{
	338	struct brcmf_fweh_info *fweh = &drvr->fweh;
	339	INIT_WORK(&fweh->event_work, brcmf_fweh_event_worker);
	340	spin_lock_init(&fweh->evt_q_lock);
	341	INIT_LIST_HEAD(&fweh->event_q);
	342	}
	343
	344	/**
	345	* brcmf_fweh_detach() - cleanup firmware event handling.
	346	*
	347	* @drvr: driver information object.
	348	*/
	349	void brcmf_fweh_detach(struct brcmf_pub *drvr)
	350	{
	351	struct brcmf_fweh_info *fweh = &drvr->fweh;
46f3b6ee	352	struct brcmf_if *ifp = brcmf_get_ifp(drvr, 0);
5c36b99a AS	353	s8 eventmask[BRCMF_EVENTING_MASK_LEN];
5c36b99a AS	354
df19e777 HM	355	if (ifp) {
	356	/* clear all events */
	357	memset(eventmask, 0, BRCMF_EVENTING_MASK_LEN);
	358	(void)brcmf_fil_iovar_data_set(ifp, "event_msgs",
	359	eventmask,
	360	BRCMF_EVENTING_MASK_LEN);
	361	}
5c36b99a AS	362	/* cancel the worker */
	363	cancel_work_sync(&fweh->event_work);
	364	WARN_ON(!list_empty(&fweh->event_q));
	365	memset(fweh->evt_handler, 0, sizeof(fweh->evt_handler));
	366	}
	367
	368	/**
	369	* brcmf_fweh_register() - register handler for given event code.
	370	*
	371	* @drvr: driver information object.
	372	* @code: event code.
	373	* @handler: handler for the given event code.
	374	*/
	375	int brcmf_fweh_register(struct brcmf_pub *drvr, enum brcmf_fweh_event_code code,
	376	brcmf_fweh_handler_t handler)
	377	{
	378	if (drvr->fweh.evt_handler[code]) {
5e8149f5	379	brcmf_err("event code %d already registered\n", code);
5c36b99a AS	380	return -ENOSPC;
	381	}
	382	drvr->fweh.evt_handler[code] = handler;
b522dd80 AS	383	brcmf_dbg(TRACE, "event handler registered for %s\n",
b522dd80 AS	384	brcmf_fweh_event_name(code));
5c36b99a AS	385	return 0;
	386	}
	387
	388	/**
	389	* brcmf_fweh_unregister() - remove handler for given code.
	390	*
	391	* @drvr: driver information object.
	392	* @code: event code.
	393	*/
	394	void brcmf_fweh_unregister(struct brcmf_pub *drvr,
	395	enum brcmf_fweh_event_code code)
	396	{
b522dd80 AS	397	brcmf_dbg(TRACE, "event handler cleared for %s\n",
b522dd80 AS	398	brcmf_fweh_event_name(code));
5c36b99a AS	399	drvr->fweh.evt_handler[code] = NULL;
	400	}
	401
	402	/**
	403	* brcmf_fweh_activate_events() - enables firmware events registered.
	404	*
	405	* @ifp: primary interface object.
	406	*/
	407	int brcmf_fweh_activate_events(struct brcmf_if *ifp)
	408	{
	409	int i, err;
	410	s8 eventmask[BRCMF_EVENTING_MASK_LEN];
	411
	412	for (i = 0; i < BRCMF_E_LAST; i++) {
	413	if (ifp->drvr->fweh.evt_handler[i]) {
	414	brcmf_dbg(EVENT, "enable event %s\n",
	415	brcmf_fweh_event_name(i));
	416	setbit(eventmask, i);
	417	}
	418	}
	419
	420	/* want to handle IF event as well */
b522dd80	421	brcmf_dbg(EVENT, "enable event IF\n");
5c36b99a AS	422	setbit(eventmask, BRCMF_E_IF);
	423
	424	err = brcmf_fil_iovar_data_set(ifp, "event_msgs",
	425	eventmask, BRCMF_EVENTING_MASK_LEN);
	426	if (err)
5e8149f5	427	brcmf_err("Set event_msgs error (%d)\n", err);
5c36b99a AS	428
	429	return err;
	430	}
	431
	432	/**
	433	* brcmf_fweh_process_event() - process skb as firmware event.
	434	*
	435	* @drvr: driver information object.
	436	* @event_packet: event packet to process.
5c36b99a AS	437	*
	438	* If the packet buffer contains a firmware event message it will
	439	* dispatch the event to a registered handler (using worker).
	440	*/
	441	void brcmf_fweh_process_event(struct brcmf_pub *drvr,
deb09280	442	struct brcmf_event *event_packet)
5c36b99a AS	443	{
5c36b99a AS	444	enum brcmf_fweh_event_code code;
607d5c0e AS	445	struct brcmf_fweh_info *fweh = &drvr->fweh;
	446	struct brcmf_fweh_queue_item *event;
	447	gfp_t alloc_flag = GFP_KERNEL;
	448	void *data;
	449	u32 datalen;
5c36b99a	450
607d5c0e	451	/* get event info */
5c36b99a	452	code = get_unaligned_be32(&event_packet->msg.event_type);
607d5c0e	453	datalen = get_unaligned_be32(&event_packet->msg.datalen);
607d5c0e AS	454	data = &event_packet[1];
607d5c0e AS	455
3e0a97e1 AS	456	if (code >= BRCMF_E_LAST)
	457	return;
	458
	459	if (code != BRCMF_E_IF && !fweh->evt_handler[code])
607d5c0e	460	return;
607d5c0e AS	461
	462	if (in_interrupt())
	463	alloc_flag = GFP_ATOMIC;
	464
	465	event = kzalloc(sizeof(*event) + datalen, alloc_flag);
5b15d0f4 JL	466	if (!event)
	467	return;
	468
607d5c0e	469	event->code = code;
deb09280	470	event->ifidx = event_packet->msg.ifidx;
607d5c0e AS	471
	472	/* use memcpy to get aligned event message */
	473	memcpy(&event->emsg, &event_packet->msg, sizeof(event->emsg));
	474	memcpy(event->data, data, datalen);
	475	memcpy(event->ifaddr, event_packet->eth.h_dest, ETH_ALEN);
5c36b99a	476
607d5c0e	477	brcmf_fweh_queue_event(fweh, event);
5c36b99a	478	}