wl_cfg80211.c 151 KB
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/*
 * Copyright (c) 2010 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.
 */

/* Toplevel file. Relies on dhd_linux.c to send commands to the dongle. */

#include <linux/kernel.h>
#include <linux/etherdevice.h>
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#include <linux/module.h>
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#include <linux/vmalloc.h>
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#include <net/cfg80211.h>
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#include <net/netlink.h>
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#include <brcmu_utils.h>
#include <defs.h>
#include <brcmu_wifi.h>
#include "dhd.h"
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#include "dhd_dbg.h"
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#include "tracepoint.h"
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#include "fwil_types.h"
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#include "p2p.h"
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#include "btcoex.h"
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#include "wl_cfg80211.h"
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#include "feature.h"
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#include "fwil.h"
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#include "vendor.h"
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#define BRCMF_SCAN_IE_LEN_MAX		2048
#define BRCMF_PNO_VERSION		2
#define BRCMF_PNO_TIME			30
#define BRCMF_PNO_REPEAT		4
#define BRCMF_PNO_FREQ_EXPO_MAX		3
#define BRCMF_PNO_MAX_PFN_COUNT		16
#define BRCMF_PNO_ENABLE_ADAPTSCAN_BIT	6
#define BRCMF_PNO_HIDDEN_BIT		2
#define BRCMF_PNO_WPA_AUTH_ANY		0xFFFFFFFF
#define BRCMF_PNO_SCAN_COMPLETE		1
#define BRCMF_PNO_SCAN_INCOMPLETE	0

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#define BRCMF_IFACE_MAX_CNT		3
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#define WPA_OUI				"\x00\x50\xF2"	/* WPA OUI */
#define WPA_OUI_TYPE			1
#define RSN_OUI				"\x00\x0F\xAC"	/* RSN OUI */
#define	WME_OUI_TYPE			2
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#define WPS_OUI_TYPE			4
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#define VS_IE_FIXED_HDR_LEN		6
#define WPA_IE_VERSION_LEN		2
#define WPA_IE_MIN_OUI_LEN		4
#define WPA_IE_SUITE_COUNT_LEN		2

#define WPA_CIPHER_NONE			0	/* None */
#define WPA_CIPHER_WEP_40		1	/* WEP (40-bit) */
#define WPA_CIPHER_TKIP			2	/* TKIP: default for WPA */
#define WPA_CIPHER_AES_CCM		4	/* AES (CCM) */
#define WPA_CIPHER_WEP_104		5	/* WEP (104-bit) */

#define RSN_AKM_NONE			0	/* None (IBSS) */
#define RSN_AKM_UNSPECIFIED		1	/* Over 802.1x */
#define RSN_AKM_PSK			2	/* Pre-shared Key */
#define RSN_CAP_LEN			2	/* Length of RSN capabilities */
#define RSN_CAP_PTK_REPLAY_CNTR_MASK	0x000C

#define VNDR_IE_CMD_LEN			4	/* length of the set command
						 * string :"add", "del" (+ NUL)
						 */
#define VNDR_IE_COUNT_OFFSET		4
#define VNDR_IE_PKTFLAG_OFFSET		8
#define VNDR_IE_VSIE_OFFSET		12
#define VNDR_IE_HDR_SIZE		12
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#define VNDR_IE_PARSE_LIMIT		5
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#define	DOT11_MGMT_HDR_LEN		24	/* d11 management header len */
#define	DOT11_BCN_PRB_FIXED_LEN		12	/* beacon/probe fixed length */
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#define BRCMF_SCAN_JOIN_ACTIVE_DWELL_TIME_MS	320
#define BRCMF_SCAN_JOIN_PASSIVE_DWELL_TIME_MS	400
#define BRCMF_SCAN_JOIN_PROBE_INTERVAL_MS	20

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#define BRCMF_ASSOC_PARAMS_FIXED_SIZE \
	(sizeof(struct brcmf_assoc_params_le) - sizeof(u16))

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static bool check_vif_up(struct brcmf_cfg80211_vif *vif)
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{
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	if (!test_bit(BRCMF_VIF_STATUS_READY, &vif->sme_state)) {
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		brcmf_dbg(INFO, "device is not ready : status (%lu)\n",
			  vif->sme_state);
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		return false;
	}
	return true;
}

#define RATE_TO_BASE100KBPS(rate)   (((rate) * 10) / 2)
#define RATETAB_ENT(_rateid, _flags) \
	{                                                               \
		.bitrate        = RATE_TO_BASE100KBPS(_rateid),     \
		.hw_value       = (_rateid),                            \
		.flags          = (_flags),                             \
	}

static struct ieee80211_rate __wl_rates[] = {
	RATETAB_ENT(BRCM_RATE_1M, 0),
	RATETAB_ENT(BRCM_RATE_2M, IEEE80211_RATE_SHORT_PREAMBLE),
	RATETAB_ENT(BRCM_RATE_5M5, IEEE80211_RATE_SHORT_PREAMBLE),
	RATETAB_ENT(BRCM_RATE_11M, IEEE80211_RATE_SHORT_PREAMBLE),
	RATETAB_ENT(BRCM_RATE_6M, 0),
	RATETAB_ENT(BRCM_RATE_9M, 0),
	RATETAB_ENT(BRCM_RATE_12M, 0),
	RATETAB_ENT(BRCM_RATE_18M, 0),
	RATETAB_ENT(BRCM_RATE_24M, 0),
	RATETAB_ENT(BRCM_RATE_36M, 0),
	RATETAB_ENT(BRCM_RATE_48M, 0),
	RATETAB_ENT(BRCM_RATE_54M, 0),
};

#define wl_a_rates		(__wl_rates + 4)
#define wl_a_rates_size	8
#define wl_g_rates		(__wl_rates + 0)
#define wl_g_rates_size	12

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/* Band templates duplicated per wiphy. The channel info
 * is filled in after querying the device.
 */
static const struct ieee80211_supported_band __wl_band_2ghz = {
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	.band = IEEE80211_BAND_2GHZ,
	.bitrates = wl_g_rates,
	.n_bitrates = wl_g_rates_size,
};

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static const struct ieee80211_supported_band __wl_band_5ghz_a = {
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	.band = IEEE80211_BAND_5GHZ,
	.bitrates = wl_a_rates,
	.n_bitrates = wl_a_rates_size,
};

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/* This is to override regulatory domains defined in cfg80211 module (reg.c)
 * By default world regulatory domain defined in reg.c puts the flags
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 * NL80211_RRF_NO_IR for 5GHz channels (for * 36..48 and 149..165).
 * With respect to these flags, wpa_supplicant doesn't * start p2p
 * operations on 5GHz channels. All the changes in world regulatory
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 * domain are to be done here.
 */
static const struct ieee80211_regdomain brcmf_regdom = {
	.n_reg_rules = 4,
	.alpha2 =  "99",
	.reg_rules = {
		/* IEEE 802.11b/g, channels 1..11 */
		REG_RULE(2412-10, 2472+10, 40, 6, 20, 0),
		/* If any */
		/* IEEE 802.11 channel 14 - Only JP enables
		 * this and for 802.11b only
		 */
		REG_RULE(2484-10, 2484+10, 20, 6, 20, 0),
		/* IEEE 802.11a, channel 36..64 */
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		REG_RULE(5150-10, 5350+10, 80, 6, 20, 0),
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		/* IEEE 802.11a, channel 100..165 */
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		REG_RULE(5470-10, 5850+10, 80, 6, 20, 0), }
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};

static const u32 __wl_cipher_suites[] = {
	WLAN_CIPHER_SUITE_WEP40,
	WLAN_CIPHER_SUITE_WEP104,
	WLAN_CIPHER_SUITE_TKIP,
	WLAN_CIPHER_SUITE_CCMP,
	WLAN_CIPHER_SUITE_AES_CMAC,
};

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/* Vendor specific ie. id = 221, oui and type defines exact ie */
struct brcmf_vs_tlv {
	u8 id;
	u8 len;
	u8 oui[3];
	u8 oui_type;
};

struct parsed_vndr_ie_info {
	u8 *ie_ptr;
	u32 ie_len;	/* total length including id & length field */
	struct brcmf_vs_tlv vndrie;
};

struct parsed_vndr_ies {
	u32 count;
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	struct parsed_vndr_ie_info ie_info[VNDR_IE_PARSE_LIMIT];
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};

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static int brcmf_roamoff;
module_param_named(roamoff, brcmf_roamoff, int, S_IRUSR);
MODULE_PARM_DESC(roamoff, "do not use internal roaming engine");

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/* Quarter dBm units to mW
 * Table starts at QDBM_OFFSET, so the first entry is mW for qdBm=153
 * Table is offset so the last entry is largest mW value that fits in
 * a u16.
 */

#define QDBM_OFFSET 153		/* Offset for first entry */
#define QDBM_TABLE_LEN 40	/* Table size */

/* Smallest mW value that will round up to the first table entry, QDBM_OFFSET.
 * Value is ( mW(QDBM_OFFSET - 1) + mW(QDBM_OFFSET) ) / 2
 */
#define QDBM_TABLE_LOW_BOUND 6493	/* Low bound */

/* Largest mW value that will round down to the last table entry,
 * QDBM_OFFSET + QDBM_TABLE_LEN-1.
 * Value is ( mW(QDBM_OFFSET + QDBM_TABLE_LEN - 1) +
 * mW(QDBM_OFFSET + QDBM_TABLE_LEN) ) / 2.
 */
#define QDBM_TABLE_HIGH_BOUND 64938	/* High bound */

static const u16 nqdBm_to_mW_map[QDBM_TABLE_LEN] = {
/* qdBm:	+0	+1	+2	+3	+4	+5	+6	+7 */
/* 153: */ 6683, 7079, 7499, 7943, 8414, 8913, 9441, 10000,
/* 161: */ 10593, 11220, 11885, 12589, 13335, 14125, 14962, 15849,
/* 169: */ 16788, 17783, 18836, 19953, 21135, 22387, 23714, 25119,
/* 177: */ 26607, 28184, 29854, 31623, 33497, 35481, 37584, 39811,
/* 185: */ 42170, 44668, 47315, 50119, 53088, 56234, 59566, 63096
};

static u16 brcmf_qdbm_to_mw(u8 qdbm)
{
	uint factor = 1;
	int idx = qdbm - QDBM_OFFSET;

	if (idx >= QDBM_TABLE_LEN)
		/* clamp to max u16 mW value */
		return 0xFFFF;

	/* scale the qdBm index up to the range of the table 0-40
	 * where an offset of 40 qdBm equals a factor of 10 mW.
	 */
	while (idx < 0) {
		idx += 40;
		factor *= 10;
	}

	/* return the mW value scaled down to the correct factor of 10,
	 * adding in factor/2 to get proper rounding.
	 */
	return (nqdBm_to_mW_map[idx] + factor / 2) / factor;
}

static u8 brcmf_mw_to_qdbm(u16 mw)
{
	u8 qdbm;
	int offset;
	uint mw_uint = mw;
	uint boundary;

	/* handle boundary case */
	if (mw_uint <= 1)
		return 0;

	offset = QDBM_OFFSET;

	/* move mw into the range of the table */
	while (mw_uint < QDBM_TABLE_LOW_BOUND) {
		mw_uint *= 10;
		offset -= 40;
	}

	for (qdbm = 0; qdbm < QDBM_TABLE_LEN - 1; qdbm++) {
		boundary = nqdBm_to_mW_map[qdbm] + (nqdBm_to_mW_map[qdbm + 1] -
						    nqdBm_to_mW_map[qdbm]) / 2;
		if (mw_uint < boundary)
			break;
	}

	qdbm += (u8) offset;

	return qdbm;
}

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static u16 chandef_to_chanspec(struct brcmu_d11inf *d11inf,
			       struct cfg80211_chan_def *ch)
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{
	struct brcmu_chan ch_inf;
	s32 primary_offset;

	brcmf_dbg(TRACE, "chandef: control %d center %d width %d\n",
		  ch->chan->center_freq, ch->center_freq1, ch->width);
	ch_inf.chnum = ieee80211_frequency_to_channel(ch->center_freq1);
	primary_offset = ch->center_freq1 - ch->chan->center_freq;
	switch (ch->width) {
	case NL80211_CHAN_WIDTH_20:
		ch_inf.bw = BRCMU_CHAN_BW_20;
		WARN_ON(primary_offset != 0);
		break;
	case NL80211_CHAN_WIDTH_40:
		ch_inf.bw = BRCMU_CHAN_BW_40;
		if (primary_offset < 0)
			ch_inf.sb = BRCMU_CHAN_SB_U;
		else
			ch_inf.sb = BRCMU_CHAN_SB_L;
		break;
	case NL80211_CHAN_WIDTH_80:
		ch_inf.bw = BRCMU_CHAN_BW_80;
		if (primary_offset < 0) {
			if (primary_offset < -CH_10MHZ_APART)
				ch_inf.sb = BRCMU_CHAN_SB_UU;
			else
				ch_inf.sb = BRCMU_CHAN_SB_UL;
		} else {
			if (primary_offset > CH_10MHZ_APART)
				ch_inf.sb = BRCMU_CHAN_SB_LL;
			else
				ch_inf.sb = BRCMU_CHAN_SB_LU;
		}
		break;
	default:
		WARN_ON_ONCE(1);
	}
	switch (ch->chan->band) {
	case IEEE80211_BAND_2GHZ:
		ch_inf.band = BRCMU_CHAN_BAND_2G;
		break;
	case IEEE80211_BAND_5GHZ:
		ch_inf.band = BRCMU_CHAN_BAND_5G;
		break;
	default:
		WARN_ON_ONCE(1);
	}
	d11inf->encchspec(&ch_inf);

	return ch_inf.chspec;
}

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u16 channel_to_chanspec(struct brcmu_d11inf *d11inf,
			struct ieee80211_channel *ch)
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{
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	struct brcmu_chan ch_inf;
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	ch_inf.chnum = ieee80211_frequency_to_channel(ch->center_freq);
	ch_inf.bw = BRCMU_CHAN_BW_20;
	d11inf->encchspec(&ch_inf);
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	return ch_inf.chspec;
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}

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/* Traverse a string of 1-byte tag/1-byte length/variable-length value
 * triples, returning a pointer to the substring whose first element
 * matches tag
 */
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const struct brcmf_tlv *
brcmf_parse_tlvs(const void *buf, int buflen, uint key)
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{
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	const struct brcmf_tlv *elt = buf;
	int totlen = buflen;
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	/* find tagged parameter */
	while (totlen >= TLV_HDR_LEN) {
		int len = elt->len;

		/* validate remaining totlen */
		if ((elt->id == key) && (totlen >= (len + TLV_HDR_LEN)))
			return elt;

		elt = (struct brcmf_tlv *)((u8 *)elt + (len + TLV_HDR_LEN));
		totlen -= (len + TLV_HDR_LEN);
	}

	return NULL;
}

/* Is any of the tlvs the expected entry? If
 * not update the tlvs buffer pointer/length.
 */
static bool
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brcmf_tlv_has_ie(const u8 *ie, const u8 **tlvs, u32 *tlvs_len,
		 const u8 *oui, u32 oui_len, u8 type)
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{
	/* If the contents match the OUI and the type */
	if (ie[TLV_LEN_OFF] >= oui_len + 1 &&
	    !memcmp(&ie[TLV_BODY_OFF], oui, oui_len) &&
	    type == ie[TLV_BODY_OFF + oui_len]) {
		return true;
	}

	if (tlvs == NULL)
		return false;
	/* point to the next ie */
	ie += ie[TLV_LEN_OFF] + TLV_HDR_LEN;
	/* calculate the length of the rest of the buffer */
	*tlvs_len -= (int)(ie - *tlvs);
	/* update the pointer to the start of the buffer */
	*tlvs = ie;

	return false;
}

static struct brcmf_vs_tlv *
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brcmf_find_wpaie(const u8 *parse, u32 len)
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{
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	const struct brcmf_tlv *ie;
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	while ((ie = brcmf_parse_tlvs(parse, len, WLAN_EID_VENDOR_SPECIFIC))) {
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		if (brcmf_tlv_has_ie((const u8 *)ie, &parse, &len,
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				     WPA_OUI, TLV_OUI_LEN, WPA_OUI_TYPE))
			return (struct brcmf_vs_tlv *)ie;
	}
	return NULL;
}

static struct brcmf_vs_tlv *
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brcmf_find_wpsie(const u8 *parse, u32 len)
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{
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	const struct brcmf_tlv *ie;
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	while ((ie = brcmf_parse_tlvs(parse, len, WLAN_EID_VENDOR_SPECIFIC))) {
		if (brcmf_tlv_has_ie((u8 *)ie, &parse, &len,
				     WPA_OUI, TLV_OUI_LEN, WPS_OUI_TYPE))
			return (struct brcmf_vs_tlv *)ie;
	}
	return NULL;
}


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static void convert_key_from_CPU(struct brcmf_wsec_key *key,
				 struct brcmf_wsec_key_le *key_le)
{
	key_le->index = cpu_to_le32(key->index);
	key_le->len = cpu_to_le32(key->len);
	key_le->algo = cpu_to_le32(key->algo);
	key_le->flags = cpu_to_le32(key->flags);
	key_le->rxiv.hi = cpu_to_le32(key->rxiv.hi);
	key_le->rxiv.lo = cpu_to_le16(key->rxiv.lo);
	key_le->iv_initialized = cpu_to_le32(key->iv_initialized);
	memcpy(key_le->data, key->data, sizeof(key->data));
	memcpy(key_le->ea, key->ea, sizeof(key->ea));
}

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static int
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send_key_to_dongle(struct net_device *ndev, struct brcmf_wsec_key *key)
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{
	int err;
	struct brcmf_wsec_key_le key_le;

	convert_key_from_CPU(key, &key_le);
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	brcmf_netdev_wait_pend8021x(ndev);

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	err = brcmf_fil_bsscfg_data_set(netdev_priv(ndev), "wsec_key", &key_le,
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					sizeof(key_le));
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	if (err)
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		brcmf_err("wsec_key error (%d)\n", err);
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	return err;
}

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static s32
brcmf_configure_arp_offload(struct brcmf_if *ifp, bool enable)
{
	s32 err;
	u32 mode;

	if (enable)
		mode = BRCMF_ARP_OL_AGENT | BRCMF_ARP_OL_PEER_AUTO_REPLY;
	else
		mode = 0;

	/* Try to set and enable ARP offload feature, this may fail, then it  */
	/* is simply not supported and err 0 will be returned                 */
	err = brcmf_fil_iovar_int_set(ifp, "arp_ol", mode);
	if (err) {
		brcmf_dbg(TRACE, "failed to set ARP offload mode to 0x%x, err = %d\n",
			  mode, err);
		err = 0;
	} else {
		err = brcmf_fil_iovar_int_set(ifp, "arpoe", enable);
		if (err) {
			brcmf_dbg(TRACE, "failed to configure (%d) ARP offload err = %d\n",
				  enable, err);
			err = 0;
		} else
			brcmf_dbg(TRACE, "successfully configured (%d) ARP offload to 0x%x\n",
				  enable, mode);
	}

	return err;
}

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static bool brcmf_is_apmode(struct brcmf_cfg80211_vif *vif)
{
	enum nl80211_iftype iftype;

	iftype = vif->wdev.iftype;
	return iftype == NL80211_IFTYPE_AP || iftype == NL80211_IFTYPE_P2P_GO;
}

static bool brcmf_is_ibssmode(struct brcmf_cfg80211_vif *vif)
{
	return vif->wdev.iftype == NL80211_IFTYPE_ADHOC;
}

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static struct wireless_dev *brcmf_cfg80211_add_iface(struct wiphy *wiphy,
						     const char *name,
						     enum nl80211_iftype type,
						     u32 *flags,
						     struct vif_params *params)
{
	brcmf_dbg(TRACE, "enter: %s type %d\n", name, type);
	switch (type) {
	case NL80211_IFTYPE_ADHOC:
	case NL80211_IFTYPE_STATION:
	case NL80211_IFTYPE_AP:
	case NL80211_IFTYPE_AP_VLAN:
	case NL80211_IFTYPE_WDS:
	case NL80211_IFTYPE_MONITOR:
	case NL80211_IFTYPE_MESH_POINT:
		return ERR_PTR(-EOPNOTSUPP);
	case NL80211_IFTYPE_P2P_CLIENT:
	case NL80211_IFTYPE_P2P_GO:
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	case NL80211_IFTYPE_P2P_DEVICE:
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		return brcmf_p2p_add_vif(wiphy, name, type, flags, params);
	case NL80211_IFTYPE_UNSPECIFIED:
	default:
		return ERR_PTR(-EINVAL);
	}
}

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static void brcmf_scan_config_mpc(struct brcmf_if *ifp, int mpc)
{
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	if (brcmf_feat_is_quirk_enabled(ifp, BRCMF_FEAT_QUIRK_NEED_MPC))
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		brcmf_set_mpc(ifp, mpc);
}

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void brcmf_set_mpc(struct brcmf_if *ifp, int mpc)
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{
	s32 err = 0;

	if (check_vif_up(ifp->vif)) {
		err = brcmf_fil_iovar_int_set(ifp, "mpc", mpc);
		if (err) {
			brcmf_err("fail to set mpc\n");
			return;
		}
		brcmf_dbg(INFO, "MPC : %d\n", mpc);
	}
}

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s32 brcmf_notify_escan_complete(struct brcmf_cfg80211_info *cfg,
				struct brcmf_if *ifp, bool aborted,
				bool fw_abort)
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{
	struct brcmf_scan_params_le params_le;
	struct cfg80211_scan_request *scan_request;
	s32 err = 0;

	brcmf_dbg(SCAN, "Enter\n");

	/* clear scan request, because the FW abort can cause a second call */
	/* to this functon and might cause a double cfg80211_scan_done      */
	scan_request = cfg->scan_request;
	cfg->scan_request = NULL;

	if (timer_pending(&cfg->escan_timeout))
		del_timer_sync(&cfg->escan_timeout);

	if (fw_abort) {
		/* Do a scan abort to stop the driver's scan engine */
		brcmf_dbg(SCAN, "ABORT scan in firmware\n");
		memset(&params_le, 0, sizeof(params_le));
		memset(params_le.bssid, 0xFF, ETH_ALEN);
		params_le.bss_type = DOT11_BSSTYPE_ANY;
		params_le.scan_type = 0;
		params_le.channel_num = cpu_to_le32(1);
		params_le.nprobes = cpu_to_le32(1);
		params_le.active_time = cpu_to_le32(-1);
		params_le.passive_time = cpu_to_le32(-1);
		params_le.home_time = cpu_to_le32(-1);
		/* Scan is aborted by setting channel_list[0] to -1 */
		params_le.channel_list[0] = cpu_to_le16(-1);
		/* E-Scan (or anyother type) can be aborted by SCAN */
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		err = brcmf_fil_cmd_data_set(ifp, BRCMF_C_SCAN,
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					     &params_le, sizeof(params_le));
		if (err)
			brcmf_err("Scan abort  failed\n");
	}
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	brcmf_scan_config_mpc(ifp, 1);
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	/*
	 * e-scan can be initiated by scheduled scan
	 * which takes precedence.
	 */
	if (cfg->sched_escan) {
		brcmf_dbg(SCAN, "scheduled scan completed\n");
		cfg->sched_escan = false;
		if (!aborted)
			cfg80211_sched_scan_results(cfg_to_wiphy(cfg));
	} else if (scan_request) {
		brcmf_dbg(SCAN, "ESCAN Completed scan: %s\n",
			  aborted ? "Aborted" : "Done");
		cfg80211_scan_done(scan_request, aborted);
	}
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	if (!test_and_clear_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status))
		brcmf_dbg(SCAN, "Scan complete, probably P2P scan\n");
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	return err;
}

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static
int brcmf_cfg80211_del_iface(struct wiphy *wiphy, struct wireless_dev *wdev)
{
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	struct brcmf_cfg80211_info *cfg = wiphy_priv(wiphy);
	struct net_device *ndev = wdev->netdev;

	/* vif event pending in firmware */
	if (brcmf_cfg80211_vif_event_armed(cfg))
		return -EBUSY;

	if (ndev) {
		if (test_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status) &&
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		    cfg->escan_info.ifp == netdev_priv(ndev))
			brcmf_notify_escan_complete(cfg, netdev_priv(ndev),
						    true, true);
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		brcmf_fil_iovar_int_set(netdev_priv(ndev), "mpc", 1);
	}

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	switch (wdev->iftype) {
	case NL80211_IFTYPE_ADHOC:
	case NL80211_IFTYPE_STATION:
	case NL80211_IFTYPE_AP:
	case NL80211_IFTYPE_AP_VLAN:
	case NL80211_IFTYPE_WDS:
	case NL80211_IFTYPE_MONITOR:
	case NL80211_IFTYPE_MESH_POINT:
		return -EOPNOTSUPP;
	case NL80211_IFTYPE_P2P_CLIENT:
	case NL80211_IFTYPE_P2P_GO:
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	case NL80211_IFTYPE_P2P_DEVICE:
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		return brcmf_p2p_del_vif(wiphy, wdev);
	case NL80211_IFTYPE_UNSPECIFIED:
	default:
		return -EINVAL;
	}
	return -EOPNOTSUPP;
}

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static s32
brcmf_cfg80211_change_iface(struct wiphy *wiphy, struct net_device *ndev,
			 enum nl80211_iftype type, u32 *flags,
			 struct vif_params *params)
{
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	struct brcmf_cfg80211_info *cfg = wiphy_priv(wiphy);
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	struct brcmf_if *ifp = netdev_priv(ndev);
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	struct brcmf_cfg80211_vif *vif = ifp->vif;
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	s32 infra = 0;
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	s32 ap = 0;
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	s32 err = 0;

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	brcmf_dbg(TRACE, "Enter, ndev=%p, type=%d\n", ndev, type);
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	switch (type) {
	case NL80211_IFTYPE_MONITOR:
	case NL80211_IFTYPE_WDS:
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		brcmf_err("type (%d) : currently we do not support this type\n",
			  type);
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		return -EOPNOTSUPP;
	case NL80211_IFTYPE_ADHOC:
		infra = 0;
		break;
	case NL80211_IFTYPE_STATION:
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		/* Ignore change for p2p IF. Unclear why supplicant does this */
		if ((vif->wdev.iftype == NL80211_IFTYPE_P2P_CLIENT) ||
		    (vif->wdev.iftype == NL80211_IFTYPE_P2P_GO)) {
			brcmf_dbg(TRACE, "Ignoring cmd for p2p if\n");
			/* WAR: It is unexpected to get a change of VIF for P2P
			 * IF, but it happens. The request can not be handled
			 * but returning EPERM causes a crash. Returning 0
			 * without setting ieee80211_ptr->iftype causes trace
			 * (WARN_ON) but it works with wpa_supplicant
			 */
			return 0;
		}
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		infra = 1;
		break;
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	case NL80211_IFTYPE_AP:
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	case NL80211_IFTYPE_P2P_GO:
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		ap = 1;
		break;
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	default:
		err = -EINVAL;
		goto done;
	}

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	if (ap) {
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		if (type == NL80211_IFTYPE_P2P_GO) {
			brcmf_dbg(INFO, "IF Type = P2P GO\n");
			err = brcmf_p2p_ifchange(cfg, BRCMF_FIL_P2P_IF_GO);
		}
		if (!err) {
			set_bit(BRCMF_VIF_STATUS_AP_CREATING, &vif->sme_state);
			brcmf_dbg(INFO, "IF Type = AP\n");
		}
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	} else {
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		err = brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_INFRA, infra);
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		if (err) {
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			brcmf_err("WLC_SET_INFRA error (%d)\n", err);
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			err = -EAGAIN;
			goto done;
		}
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		brcmf_dbg(INFO, "IF Type = %s\n", brcmf_is_ibssmode(vif) ?
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			  "Adhoc" : "Infra");
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	}
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	ndev->ieee80211_ptr->iftype = type;
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done:
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	brcmf_dbg(TRACE, "Exit\n");
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	return err;
}

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static void brcmf_escan_prep(struct brcmf_cfg80211_info *cfg,
			     struct brcmf_scan_params_le *params_le,
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			     struct cfg80211_scan_request *request)
{
	u32 n_ssids;
	u32 n_channels;
	s32 i;
	s32 offset;
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	u16 chanspec;
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	char *ptr;
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	struct brcmf_ssid_le ssid_le;
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	memset(params_le->bssid, 0xFF, ETH_ALEN);
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	params_le->bss_type = DOT11_BSSTYPE_ANY;
	params_le->scan_type = 0;
	params_le->channel_num = 0;
	params_le->nprobes = cpu_to_le32(-1);
	params_le->active_time = cpu_to_le32(-1);
	params_le->passive_time = cpu_to_le32(-1);
	params_le->home_time = cpu_to_le32(-1);
	memset(&params_le->ssid_le, 0, sizeof(params_le->ssid_le));

	/* if request is null exit so it will be all channel broadcast scan */
	if (!request)
		return;

	n_ssids = request->n_ssids;
	n_channels = request->n_channels;
	/* Copy channel array if applicable */
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	brcmf_dbg(SCAN, "### List of channelspecs to scan ### %d\n",
		  n_channels);
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	if (n_channels > 0) {
		for (i = 0; i < n_channels; i++) {
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			chanspec = channel_to_chanspec(&cfg->d11inf,
						       request->channels[i]);
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			brcmf_dbg(SCAN, "Chan : %d, Channel spec: %x\n",
				  request->channels[i]->hw_value, chanspec);
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			params_le->channel_list[i] = cpu_to_le16(chanspec);
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		}
	} else {
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		brcmf_dbg(SCAN, "Scanning all channels\n");
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	}
	/* Copy ssid array if applicable */
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	brcmf_dbg(SCAN, "### List of SSIDs to scan ### %d\n", n_ssids);
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	if (n_ssids > 0) {
		offset = offsetof(struct brcmf_scan_params_le, channel_list) +
				n_channels * sizeof(u16);
		offset = roundup(offset, sizeof(u32));
		ptr = (char *)params_le + offset;
		for (i = 0; i < n_ssids; i++) {
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			memset(&ssid_le, 0, sizeof(ssid_le));
			ssid_le.SSID_len =
					cpu_to_le32(request->ssids[i].ssid_len);
			memcpy(ssid_le.SSID, request->ssids[i].ssid,
			       request->ssids[i].ssid_len);
			if (!ssid_le.SSID_len)
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				brcmf_dbg(SCAN, "%d: Broadcast scan\n", i);
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			else
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				brcmf_dbg(SCAN, "%d: scan for  %s size =%d\n",
					  i, ssid_le.SSID, ssid_le.SSID_len);
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			memcpy(ptr, &ssid_le, sizeof(ssid_le));
			ptr += sizeof(ssid_le);
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		}
	} else {
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		brcmf_dbg(SCAN, "Broadcast scan %p\n", request->ssids);
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		if ((request->ssids) && request->ssids->ssid_len) {
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			brcmf_dbg(SCAN, "SSID %s len=%d\n",
				  params_le->ssid_le.SSID,
				  request->ssids->ssid_len);
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			params_le->ssid_le.SSID_len =
				cpu_to_le32(request->ssids->ssid_len);
			memcpy(&params_le->ssid_le.SSID, request->ssids->ssid,
				request->ssids->ssid_len);
		}
	}
	/* Adding mask to channel numbers */
	params_le->channel_num =
		cpu_to_le32((n_ssids << BRCMF_SCAN_PARAMS_NSSID_SHIFT) |
			(n_channels & BRCMF_SCAN_PARAMS_COUNT_MASK));
}

static s32
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brcmf_run_escan(struct brcmf_cfg80211_info *cfg, struct brcmf_if *ifp,
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		struct cfg80211_scan_request *request, u16 action)
{
	s32 params_size = BRCMF_SCAN_PARAMS_FIXED_SIZE +
			  offsetof(struct brcmf_escan_params_le, params_le);
	struct brcmf_escan_params_le *params;
	s32 err = 0;

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	brcmf_dbg(SCAN, "E-SCAN START\n");
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	if (request != NULL) {
		/* Allocate space for populating ssids in struct */
		params_size += sizeof(u32) * ((request->n_channels + 1) / 2);

		/* Allocate space for populating ssids in struct */
		params_size += sizeof(struct brcmf_ssid) * request->n_ssids;
	}

	params = kzalloc(params_size, GFP_KERNEL);
	if (!params) {
		err = -ENOMEM;
		goto exit;
	}
	BUG_ON(params_size + sizeof("escan") >= BRCMF_DCMD_MEDLEN);
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	brcmf_escan_prep(cfg, &params->params_le, request);
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	params->version = cpu_to_le32(BRCMF_ESCAN_REQ_VERSION);
	params->action = cpu_to_le16(action);
	params->sync_id = cpu_to_le16(0x1234);

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	err = brcmf_fil_iovar_data_set(ifp, "escan", params, params_size);
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	if (err) {
		if (err == -EBUSY)
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			brcmf_dbg(INFO, "system busy : escan canceled\n");
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		else
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			brcmf_err("error (%d)\n", err);
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	}

	kfree(params);
exit:
	return err;
}

static s32
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brcmf_do_escan(struct brcmf_cfg80211_info *cfg, struct wiphy *wiphy,
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	       struct brcmf_if *ifp, struct cfg80211_scan_request *request)
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{
	s32 err;
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	u32 passive_scan;
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	struct brcmf_scan_results *results;
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	struct escan_info *escan = &cfg->escan_info;
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	brcmf_dbg(SCAN, "Enter\n");
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	escan->ifp = ifp;
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	escan->wiphy = wiphy;
	escan->escan_state = WL_ESCAN_STATE_SCANNING;
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	passive_scan = cfg->active_scan ? 0 : 1;
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	err = brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_PASSIVE_SCAN,
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				    passive_scan);
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	if (err) {
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		brcmf_err("error (%d)\n", err);
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		return err;
	}
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	brcmf_scan_config_mpc(ifp, 0);
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	results = (struct brcmf_scan_results *)cfg->escan_info.escan_buf;
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	results->version = 0;
	results->count = 0;
	results->buflen = WL_ESCAN_RESULTS_FIXED_SIZE;

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	err = escan->run(cfg, ifp, request, WL_ESCAN_ACTION_START);
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	if (err)
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		brcmf_scan_config_mpc(ifp, 1);
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	return err;
}

static s32
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brcmf_cfg80211_escan(struct wiphy *wiphy, struct brcmf_cfg80211_vif *vif,
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		     struct cfg80211_scan_request *request,
		     struct cfg80211_ssid *this_ssid)
{
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	struct brcmf_if *ifp = vif->ifp;
	struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
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	struct cfg80211_ssid *ssids;
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	struct brcmf_cfg80211_scan_req *sr = &cfg->scan_req_int;
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	u32 passive_scan;
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	bool escan_req;
	bool spec_scan;
	s32 err;
	u32 SSID_len;

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	brcmf_dbg(SCAN, "START ESCAN\n");
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	if (test_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status)) {
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		brcmf_err("Scanning already: status (%lu)\n", cfg->scan_status);
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		return -EAGAIN;
	}
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	if (test_bit(BRCMF_SCAN_STATUS_ABORT, &cfg->scan_status)) {
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		brcmf_err("Scanning being aborted: status (%lu)\n",
			  cfg->scan_status);
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		return -EAGAIN;
	}
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	if (test_bit(BRCMF_SCAN_STATUS_SUPPRESS, &cfg->scan_status)) {
		brcmf_err("Scanning suppressed: status (%lu)\n",
			  cfg->scan_status);
		return -EAGAIN;
	}
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	if (test_bit(BRCMF_VIF_STATUS_CONNECTING, &ifp->vif->sme_state)) {
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		brcmf_err("Connecting: status (%lu)\n", ifp->vif->sme_state);
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		return -EAGAIN;
	}

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	/* If scan req comes for p2p0, send it over primary I/F */
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	if (vif == cfg->p2p.bss_idx[P2PAPI_BSSCFG_DEVICE].vif)
		vif = cfg->p2p.bss_idx[P2PAPI_BSSCFG_PRIMARY].vif;
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	/* Arm scan timeout timer */
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	mod_timer(&cfg->escan_timeout, jiffies +
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			WL_ESCAN_TIMER_INTERVAL_MS * HZ / 1000);

	escan_req = false;
	if (request) {
		/* scan bss */
		ssids = request->ssids;
		escan_req = true;
	} else {
		/* scan in ibss */
		/* we don't do escan in ibss */
		ssids = this_ssid;
	}

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	cfg->scan_request = request;
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	set_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status);
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	if (escan_req) {
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		cfg->escan_info.run = brcmf_run_escan;
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		err = brcmf_p2p_scan_prep(wiphy, request, vif);
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		if (err)
			goto scan_out;

948
		err = brcmf_do_escan(cfg, wiphy, vif->ifp, request);
949
		if (err)
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			goto scan_out;
	} else {
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		brcmf_dbg(SCAN, "ssid \"%s\", ssid_len (%d)\n",
			  ssids->ssid, ssids->ssid_len);
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		memset(&sr->ssid_le, 0, sizeof(sr->ssid_le));
		SSID_len = min_t(u8, sizeof(sr->ssid_le.SSID), ssids->ssid_len);
		sr->ssid_le.SSID_len = cpu_to_le32(0);
		spec_scan = false;
		if (SSID_len) {
			memcpy(sr->ssid_le.SSID, ssids->ssid, SSID_len);
			sr->ssid_le.SSID_len = cpu_to_le32(SSID_len);
			spec_scan = true;
		} else
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			brcmf_dbg(SCAN, "Broadcast scan\n");
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964

965
		passive_scan = cfg->active_scan ? 0 : 1;
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		err = brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_PASSIVE_SCAN,
967
					    passive_scan);
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		if (err) {
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			brcmf_err("WLC_SET_PASSIVE_SCAN error (%d)\n", err);
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			goto scan_out;
		}
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		brcmf_scan_config_mpc(ifp, 0);
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		err = brcmf_fil_cmd_data_set(ifp, BRCMF_C_SCAN,
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					     &sr->ssid_le, sizeof(sr->ssid_le));
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		if (err) {
			if (err == -EBUSY)
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				brcmf_dbg(INFO, "BUSY: scan for \"%s\" canceled\n",
					  sr->ssid_le.SSID);
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			else
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				brcmf_err("WLC_SCAN error (%d)\n", err);
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982
			brcmf_scan_config_mpc(ifp, 1);
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			goto scan_out;
		}
	}

	return 0;

scan_out:
990
	clear_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status);
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	if (timer_pending(&cfg->escan_timeout))
		del_timer_sync(&cfg->escan_timeout);
	cfg->scan_request = NULL;
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	return err;
}

997
static s32
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brcmf_cfg80211_scan(struct wiphy *wiphy, struct cfg80211_scan_request *request)
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{
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	struct brcmf_cfg80211_vif *vif;
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	s32 err = 0;

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	brcmf_dbg(TRACE, "Enter\n");
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	vif = container_of(request->wdev, struct brcmf_cfg80211_vif, wdev);
	if (!check_vif_up(vif))
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		return -EIO;

1008
	err = brcmf_cfg80211_escan(wiphy, vif, request, NULL);
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1010
	if (err)
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		brcmf_err("scan error (%d)\n", err);
1012

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	brcmf_dbg(TRACE, "Exit\n");
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	return err;
}

static s32 brcmf_set_rts(struct net_device *ndev, u32 rts_threshold)
{
	s32 err = 0;

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	err = brcmf_fil_iovar_int_set(netdev_priv(ndev), "rtsthresh",
				      rts_threshold);
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	if (err)
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		brcmf_err("Error (%d)\n", err);
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	return err;
}

static s32 brcmf_set_frag(struct net_device *ndev, u32 frag_threshold)
{
	s32 err = 0;

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	err = brcmf_fil_iovar_int_set(netdev_priv(ndev), "fragthresh",
				      frag_threshold);
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	if (err)
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		brcmf_err("Error (%d)\n", err);
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	return err;
}

static s32 brcmf_set_retry(struct net_device *ndev, u32 retry, bool l)
{
	s32 err = 0;
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1044
	u32 cmd = (l ? BRCMF_C_SET_LRL : BRCMF_C_SET_SRL);
1045

1046
	err = brcmf_fil_cmd_int_set(netdev_priv(ndev), cmd, retry);
1047
	if (err) {
1048
		brcmf_err("cmd (%d) , error (%d)\n", cmd, err);
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		return err;
	}
	return err;
}

static s32 brcmf_cfg80211_set_wiphy_params(struct wiphy *wiphy, u32 changed)
{
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	struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
	struct net_device *ndev = cfg_to_ndev(cfg);
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	struct brcmf_if *ifp = netdev_priv(ndev);
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	s32 err = 0;

1061
	brcmf_dbg(TRACE, "Enter\n");
1062
	if (!check_vif_up(ifp->vif))
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		return -EIO;

	if (changed & WIPHY_PARAM_RTS_THRESHOLD &&
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	    (cfg->conf->rts_threshold != wiphy->rts_threshold)) {
		cfg->conf->rts_threshold = wiphy->rts_threshold;
		err = brcmf_set_rts(ndev, cfg->conf->rts_threshold);
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		if (!err)
			goto done;
	}
	if (changed & WIPHY_PARAM_FRAG_THRESHOLD &&
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	    (cfg->conf->frag_threshold != wiphy->frag_threshold)) {
		cfg->conf->frag_threshold = wiphy->frag_threshold;
		err = brcmf_set_frag(ndev, cfg->conf->frag_threshold);
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		if (!err)
			goto done;
	}
	if (changed & WIPHY_PARAM_RETRY_LONG
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	    && (cfg->conf->retry_long != wiphy->retry_long)) {
		cfg->conf->retry_long = wiphy->retry_long;
		err = brcmf_set_retry(ndev, cfg->conf->retry_long, true);
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		if (!err)
			goto done;
	}
	if (changed & WIPHY_PARAM_RETRY_SHORT
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	    && (cfg->conf->retry_short != wiphy->retry_short)) {
		cfg->conf->retry_short = wiphy->retry_short;
		err = brcmf_set_retry(ndev, cfg->conf->retry_short, false);
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		if (!err)
			goto done;
	}

done:
1095
	brcmf_dbg(TRACE, "Exit\n");
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	return err;
}

static void brcmf_init_prof(struct brcmf_cfg80211_profile *prof)
{
	memset(prof, 0, sizeof(*prof));
}

1104
static void brcmf_link_down(struct brcmf_cfg80211_vif *vif)
1105
{
1106
	struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(vif->wdev.wiphy);
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	s32 err = 0;

1109
	brcmf_dbg(TRACE, "Enter\n");
1110

1111
	if (test_bit(BRCMF_VIF_STATUS_CONNECTED, &vif->sme_state)) {
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		brcmf_dbg(INFO, "Call WLC_DISASSOC to stop excess roaming\n ");
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		err = brcmf_fil_cmd_data_set(vif->ifp,
1114
					     BRCMF_C_DISASSOC, NULL, 0);
1115
		if (err) {
1116
			brcmf_err("WLC_DISASSOC failed (%d)\n", err);
1117
		}
1118
		clear_bit(BRCMF_VIF_STATUS_CONNECTED, &vif->sme_state);
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		cfg80211_disconnected(vif->wdev.netdev, 0, NULL, 0, GFP_KERNEL);

1121
	}
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	clear_bit(BRCMF_VIF_STATUS_CONNECTING, &vif->sme_state);
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	clear_bit(BRCMF_SCAN_STATUS_SUPPRESS, &cfg->scan_status);
	brcmf_btcoex_set_mode(vif, BRCMF_BTCOEX_ENABLED, 0);
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	brcmf_dbg(TRACE, "Exit\n");
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}

static s32
brcmf_cfg80211_join_ibss(struct wiphy *wiphy, struct net_device *ndev,
		      struct cfg80211_ibss_params *params)
{
1132
	struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
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	struct brcmf_if *ifp = netdev_priv(ndev);
	struct brcmf_cfg80211_profile *profile = &ifp->vif->profile;
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	struct brcmf_join_params join_params;
	size_t join_params_size = 0;
	s32 err = 0;
	s32 wsec = 0;
	s32 bcnprd;
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	u16 chanspec;
1141

1142
	brcmf_dbg(TRACE, "Enter\n");
1143
	if (!check_vif_up(ifp->vif))
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		return -EIO;

	if (params->ssid)
1147
		brcmf_dbg(CONN, "SSID: %s\n", params->ssid);
1148
	else {
1149
		brcmf_dbg(CONN, "SSID: NULL, Not supported\n");
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		return -EOPNOTSUPP;
	}

1153
	set_bit(BRCMF_VIF_STATUS_CONNECTING, &ifp->vif->sme_state);
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1155

	if (params->bssid)
1156
		brcmf_dbg(CONN, "BSSID: %pM\n", params->bssid);
1157
	else
1158
		brcmf_dbg(CONN, "No BSSID specified\n");
1159

1160
	if (params->chandef.chan)
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		brcmf_dbg(CONN, "channel: %d\n",
			  params->chandef.chan->center_freq);
1163
	else
1164
		brcmf_dbg(CONN, "no channel specified\n");
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	if (params->channel_fixed)
1167
		brcmf_dbg(CONN, "fixed channel required\n");
1168
	else
1169
		brcmf_dbg(CONN, "no fixed channel required\n");
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	if (params->ie && params->ie_len)
1172
		brcmf_dbg(CONN, "ie len: %d\n", params->ie_len);
1173
	else
1174
		brcmf_dbg(CONN, "no ie specified\n");
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	if (params->beacon_interval)
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		brcmf_dbg(CONN, "beacon interval: %d\n",
			  params->beacon_interval);
1179
	else
1180
		brcmf_dbg(CONN, "no beacon interval specified\n");
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1182

	if (params->basic_rates)
1183
		brcmf_dbg(CONN, "basic rates: %08X\n", params->basic_rates);
1184
	else
1185
		brcmf_dbg(CONN, "no basic rates specified\n");
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1187

	if (params->privacy)
1188
		brcmf_dbg(CONN, "privacy required\n");
1189
	else
1190
		brcmf_dbg(CONN, "no privacy required\n");
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1195

	/* Configure Privacy for starter */
	if (params->privacy)
		wsec |= WEP_ENABLED;

1196
	err = brcmf_fil_iovar_int_set(ifp, "wsec", wsec);
1197
	if (err) {
1198
		brcmf_err("wsec failed (%d)\n", err);
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		goto done;
	}

	/* Configure Beacon Interval for starter */
	if (params->beacon_interval)
		bcnprd = params->beacon_interval;
	else
		bcnprd = 100;

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	err = brcmf_fil_cmd_int_set(ifp, BRCMF_C_SET_BCNPRD, bcnprd);
1209
	if (err) {
1210
		brcmf_err("WLC_SET_BCNPRD failed (%d)\n", err);
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		goto done;
	}

	/* Configure required join parameter */
	memset(&join_params, 0, sizeof(struct brcmf_join_params));

	/* SSID */
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	profile->ssid.SSID_len = min_t(u32, params->ssid_len, 32);
	memcpy(profile->ssid.SSID, params->ssid, profile->ssid.SSID_len);
	memcpy(join_params.ssid_le.SSID, params->ssid, profile->ssid.SSID_len);
	join_params.ssid_le.SSID_len = cpu_to_le32(profile->ssid.SSID_len);
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	join_params_size = sizeof(join_params.ssid_le);

	/* BSSID */
	if (params->bssid) {
		memcpy(join_params.params_le.bssid, params->bssid, ETH_ALEN);
		join_params_size = sizeof(join_params.ssid_le) +
				   BRCMF_ASSOC_PARAMS_FIXED_SIZE;
1229
		memcpy(profile->bssid, params->bssid, ETH_ALEN);
1230
	} else {
1231
		memset(join_params.params_le.bssid, 0xFF, ETH_ALEN);
1232
		memset(profile->bssid, 0, ETH_ALEN);
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	}

	/* Channel */
1236
	if (params->chandef.chan) {
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