rsi_91x_mac80211.c

   1/*
   2 * Copyright (c) 2014 Redpine Signals Inc.
   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
  11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15 */
  16
  17#include <linux/etherdevice.h>
  18#include "rsi_debugfs.h"
  19#include "rsi_mgmt.h"
  20#include "rsi_sdio.h"
  21#include "rsi_common.h"
  22#include "rsi_ps.h"
  23
  24static const struct ieee80211_channel rsi_2ghz_channels[] = {
  25	{ .band = NL80211_BAND_2GHZ, .center_freq = 2412,
  26	  .hw_value = 1 }, /* Channel 1 */
  27	{ .band = NL80211_BAND_2GHZ, .center_freq = 2417,
  28	  .hw_value = 2 }, /* Channel 2 */
  29	{ .band = NL80211_BAND_2GHZ, .center_freq = 2422,
  30	  .hw_value = 3 }, /* Channel 3 */
  31	{ .band = NL80211_BAND_2GHZ, .center_freq = 2427,
  32	  .hw_value = 4 }, /* Channel 4 */
  33	{ .band = NL80211_BAND_2GHZ, .center_freq = 2432,
  34	  .hw_value = 5 }, /* Channel 5 */
  35	{ .band = NL80211_BAND_2GHZ, .center_freq = 2437,
  36	  .hw_value = 6 }, /* Channel 6 */
  37	{ .band = NL80211_BAND_2GHZ, .center_freq = 2442,
  38	  .hw_value = 7 }, /* Channel 7 */
  39	{ .band = NL80211_BAND_2GHZ, .center_freq = 2447,
  40	  .hw_value = 8 }, /* Channel 8 */
  41	{ .band = NL80211_BAND_2GHZ, .center_freq = 2452,
  42	  .hw_value = 9 }, /* Channel 9 */
  43	{ .band = NL80211_BAND_2GHZ, .center_freq = 2457,
  44	  .hw_value = 10 }, /* Channel 10 */
  45	{ .band = NL80211_BAND_2GHZ, .center_freq = 2462,
  46	  .hw_value = 11 }, /* Channel 11 */
  47	{ .band = NL80211_BAND_2GHZ, .center_freq = 2467,
  48	  .hw_value = 12 }, /* Channel 12 */
  49	{ .band = NL80211_BAND_2GHZ, .center_freq = 2472,
  50	  .hw_value = 13 }, /* Channel 13 */
  51	{ .band = NL80211_BAND_2GHZ, .center_freq = 2484,
  52	  .hw_value = 14 }, /* Channel 14 */
  53};
  54
  55static const struct ieee80211_channel rsi_5ghz_channels[] = {
  56	{ .band = NL80211_BAND_5GHZ, .center_freq = 5180,
  57	  .hw_value = 36,  }, /* Channel 36 */
  58	{ .band = NL80211_BAND_5GHZ, .center_freq = 5200,
  59	  .hw_value = 40, }, /* Channel 40 */
  60	{ .band = NL80211_BAND_5GHZ, .center_freq = 5220,
  61	  .hw_value = 44, }, /* Channel 44 */
  62	{ .band = NL80211_BAND_5GHZ, .center_freq = 5240,
  63	  .hw_value = 48, }, /* Channel 48 */
  64	{ .band = NL80211_BAND_5GHZ, .center_freq = 5260,
  65	  .hw_value = 52, }, /* Channel 52 */
  66	{ .band = NL80211_BAND_5GHZ, .center_freq = 5280,
  67	  .hw_value = 56, }, /* Channel 56 */
  68	{ .band = NL80211_BAND_5GHZ, .center_freq = 5300,
  69	  .hw_value = 60, }, /* Channel 60 */
  70	{ .band = NL80211_BAND_5GHZ, .center_freq = 5320,
  71	  .hw_value = 64, }, /* Channel 64 */
  72	{ .band = NL80211_BAND_5GHZ, .center_freq = 5500,
  73	  .hw_value = 100, }, /* Channel 100 */
  74	{ .band = NL80211_BAND_5GHZ, .center_freq = 5520,
  75	  .hw_value = 104, }, /* Channel 104 */
  76	{ .band = NL80211_BAND_5GHZ, .center_freq = 5540,
  77	  .hw_value = 108, }, /* Channel 108 */
  78	{ .band = NL80211_BAND_5GHZ, .center_freq = 5560,
  79	  .hw_value = 112, }, /* Channel 112 */
  80	{ .band = NL80211_BAND_5GHZ, .center_freq = 5580,
  81	  .hw_value = 116, }, /* Channel 116 */
  82	{ .band = NL80211_BAND_5GHZ, .center_freq = 5600,
  83	  .hw_value = 120, }, /* Channel 120 */
  84	{ .band = NL80211_BAND_5GHZ, .center_freq = 5620,
  85	  .hw_value = 124, }, /* Channel 124 */
  86	{ .band = NL80211_BAND_5GHZ, .center_freq = 5640,
  87	  .hw_value = 128, }, /* Channel 128 */
  88	{ .band = NL80211_BAND_5GHZ, .center_freq = 5660,
  89	  .hw_value = 132, }, /* Channel 132 */
  90	{ .band = NL80211_BAND_5GHZ, .center_freq = 5680,
  91	  .hw_value = 136, }, /* Channel 136 */
  92	{ .band = NL80211_BAND_5GHZ, .center_freq = 5700,
  93	  .hw_value = 140, }, /* Channel 140 */
  94	{ .band = NL80211_BAND_5GHZ, .center_freq = 5745,
  95	  .hw_value = 149, }, /* Channel 149 */
  96	{ .band = NL80211_BAND_5GHZ, .center_freq = 5765,
  97	  .hw_value = 153, }, /* Channel 153 */
  98	{ .band = NL80211_BAND_5GHZ, .center_freq = 5785,
  99	  .hw_value = 157, }, /* Channel 157 */
 100	{ .band = NL80211_BAND_5GHZ, .center_freq = 5805,
 101	  .hw_value = 161, }, /* Channel 161 */
 102	{ .band = NL80211_BAND_5GHZ, .center_freq = 5825,
 103	  .hw_value = 165, }, /* Channel 165 */
 104};
 105
 106struct ieee80211_rate rsi_rates[12] = {
 107	{ .bitrate = STD_RATE_01  * 5, .hw_value = RSI_RATE_1 },
 108	{ .bitrate = STD_RATE_02  * 5, .hw_value = RSI_RATE_2 },
 109	{ .bitrate = STD_RATE_5_5 * 5, .hw_value = RSI_RATE_5_5 },
 110	{ .bitrate = STD_RATE_11  * 5, .hw_value = RSI_RATE_11 },
 111	{ .bitrate = STD_RATE_06  * 5, .hw_value = RSI_RATE_6 },
 112	{ .bitrate = STD_RATE_09  * 5, .hw_value = RSI_RATE_9 },
 113	{ .bitrate = STD_RATE_12  * 5, .hw_value = RSI_RATE_12 },
 114	{ .bitrate = STD_RATE_18  * 5, .hw_value = RSI_RATE_18 },
 115	{ .bitrate = STD_RATE_24  * 5, .hw_value = RSI_RATE_24 },
 116	{ .bitrate = STD_RATE_36  * 5, .hw_value = RSI_RATE_36 },
 117	{ .bitrate = STD_RATE_48  * 5, .hw_value = RSI_RATE_48 },
 118	{ .bitrate = STD_RATE_54  * 5, .hw_value = RSI_RATE_54 },
 119};
 120
 121const u16 rsi_mcsrates[8] = {
 122	RSI_RATE_MCS0, RSI_RATE_MCS1, RSI_RATE_MCS2, RSI_RATE_MCS3,
 123	RSI_RATE_MCS4, RSI_RATE_MCS5, RSI_RATE_MCS6, RSI_RATE_MCS7
 124};
 125
 126static const u32 rsi_max_ap_stas[16] = {
 127	32,	/* 1 - Wi-Fi alone */
 128	0,	/* 2 */
 129	0,	/* 3 */
 130	0,	/* 4 - BT EDR alone */
 131	4,	/* 5 - STA + BT EDR */
 132	32,	/* 6 - AP + BT EDR */
 133	0,	/* 7 */
 134	0,	/* 8 - BT LE alone */
 135	4,	/* 9 - STA + BE LE */
 136	0,	/* 10 */
 137	0,	/* 11 */
 138	0,	/* 12 */
 139	1,	/* 13 - STA + BT Dual */
 140	4,	/* 14 - AP + BT Dual */
 141};
 142
 143static const struct ieee80211_iface_limit rsi_iface_limits[] = {
 144	{
 145		.max = 1,
 146		.types = BIT(NL80211_IFTYPE_STATION),
 147	},
 148	{
 149		.max = 1,
 150		.types = BIT(NL80211_IFTYPE_AP) |
 151			BIT(NL80211_IFTYPE_P2P_CLIENT) |
 152			BIT(NL80211_IFTYPE_P2P_GO),
 153	},
 154	{
 155		.max = 1,
 156		.types = BIT(NL80211_IFTYPE_P2P_DEVICE),
 157	},
 158};
 159
 160static const struct ieee80211_iface_combination rsi_iface_combinations[] = {
 161	{
 162		.num_different_channels = 1,
 163		.max_interfaces = 3,
 164		.limits = rsi_iface_limits,
 165		.n_limits = ARRAY_SIZE(rsi_iface_limits),
 166	},
 167};
 168
 169/**
 170 * rsi_is_cipher_wep() -  This function determines if the cipher is WEP or not.
 171 * @common: Pointer to the driver private structure.
 172 *
 173 * Return: If cipher type is WEP, a value of 1 is returned, else 0.
 174 */
 175
 176bool rsi_is_cipher_wep(struct rsi_common *common)
 177{
 178	if (((common->secinfo.gtk_cipher == WLAN_CIPHER_SUITE_WEP104) ||
 179	     (common->secinfo.gtk_cipher == WLAN_CIPHER_SUITE_WEP40)) &&
 180	    (!common->secinfo.ptk_cipher))
 181		return true;
 182	else
 183		return false;
 184}
 185
 186/**
 187 * rsi_register_rates_channels() - This function registers channels and rates.
 188 * @adapter: Pointer to the adapter structure.
 189 * @band: Operating band to be set.
 190 *
 191 * Return: int - 0 on success, negative error on failure.
 192 */
 193static int rsi_register_rates_channels(struct rsi_hw *adapter, int band)
 194{
 195	struct ieee80211_supported_band *sbands = &adapter->sbands[band];
 196	void *channels = NULL;
 197
 198	if (band == NL80211_BAND_2GHZ) {
 199		channels = kmemdup(rsi_2ghz_channels, sizeof(rsi_2ghz_channels),
 200				   GFP_KERNEL);
 201		if (!channels)
 202			return -ENOMEM;
 203		sbands->band = NL80211_BAND_2GHZ;
 204		sbands->n_channels = ARRAY_SIZE(rsi_2ghz_channels);
 205		sbands->bitrates = rsi_rates;
 206		sbands->n_bitrates = ARRAY_SIZE(rsi_rates);
 207	} else {
 208		channels = kmemdup(rsi_5ghz_channels, sizeof(rsi_5ghz_channels),
 209				   GFP_KERNEL);
 210		if (!channels)
 211			return -ENOMEM;
 212		sbands->band = NL80211_BAND_5GHZ;
 213		sbands->n_channels = ARRAY_SIZE(rsi_5ghz_channels);
 214		sbands->bitrates = &rsi_rates[4];
 215		sbands->n_bitrates = ARRAY_SIZE(rsi_rates) - 4;
 216	}
 217
 218	sbands->channels = channels;
 219
 220	memset(&sbands->ht_cap, 0, sizeof(struct ieee80211_sta_ht_cap));
 221	sbands->ht_cap.ht_supported = true;
 222	sbands->ht_cap.cap = (IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
 223			      IEEE80211_HT_CAP_SGI_20 |
 224			      IEEE80211_HT_CAP_SGI_40);
 225	sbands->ht_cap.ampdu_factor = IEEE80211_HT_MAX_AMPDU_16K;
 226	sbands->ht_cap.ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE;
 227	sbands->ht_cap.mcs.rx_mask[0] = 0xff;
 228	sbands->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
 229	/* sbands->ht_cap.mcs.rx_highest = 0x82; */
 230	return 0;
 231}
 232
 233static int rsi_mac80211_hw_scan_start(struct ieee80211_hw *hw,
 234				      struct ieee80211_vif *vif,
 235				      struct ieee80211_scan_request *hw_req)
 236{
 237	struct cfg80211_scan_request *scan_req = &hw_req->req;
 238	struct rsi_hw *adapter = hw->priv;
 239	struct rsi_common *common = adapter->priv;
 240
 241	rsi_dbg(INFO_ZONE, "***** Hardware scan start *****\n");
 242	common->mac_ops_resumed = false;
 243
 244	if (common->fsm_state != FSM_MAC_INIT_DONE)
 245		return -ENODEV;
 246
 247	if ((common->wow_flags & RSI_WOW_ENABLED) ||
 248	    scan_req->n_channels == 0)
 249		return -EINVAL;
 250
 251	/* Scan already in progress. So return */
 252	if (common->bgscan_en)
 253		return -EBUSY;
 254
 255	/* If STA is not connected, return with special value 1, in order
 256	 * to start sw_scan in mac80211
 257	 */
 258	if (!vif->cfg.assoc)
 259		return 1;
 260
 261	mutex_lock(&common->mutex);
 262	common->hwscan = scan_req;
 263	if (!rsi_send_bgscan_params(common, RSI_START_BGSCAN)) {
 264		if (!rsi_send_bgscan_probe_req(common, vif)) {
 265			rsi_dbg(INFO_ZONE, "Background scan started...\n");
 266			common->bgscan_en = true;
 267		}
 268	}
 269	mutex_unlock(&common->mutex);
 270
 271	return 0;
 272}
 273
 274static void rsi_mac80211_cancel_hw_scan(struct ieee80211_hw *hw,
 275					struct ieee80211_vif *vif)
 276{
 277	struct rsi_hw *adapter = hw->priv;
 278	struct rsi_common *common = adapter->priv;
 279	struct cfg80211_scan_info info;
 280
 281	rsi_dbg(INFO_ZONE, "***** Hardware scan stop *****\n");
 282	mutex_lock(&common->mutex);
 283
 284	if (common->bgscan_en) {
 285		if (!rsi_send_bgscan_params(common, RSI_STOP_BGSCAN))
 286			common->bgscan_en = false;
 287		info.aborted = false;
 288		ieee80211_scan_completed(adapter->hw, &info);
 289		rsi_dbg(INFO_ZONE, "Back ground scan cancelled\n");
 290	}
 291	common->hwscan = NULL;
 292	mutex_unlock(&common->mutex);
 293}
 294
 295/**
 296 * rsi_mac80211_detach() - This function is used to de-initialize the
 297 *			   Mac80211 stack.
 298 * @adapter: Pointer to the adapter structure.
 299 *
 300 * Return: None.
 301 */
 302void rsi_mac80211_detach(struct rsi_hw *adapter)
 303{
 304	struct ieee80211_hw *hw = adapter->hw;
 305	enum nl80211_band band;
 306
 307	if (hw) {
 308		ieee80211_stop_queues(hw);
 309		ieee80211_unregister_hw(hw);
 310		ieee80211_free_hw(hw);
 311		adapter->hw = NULL;
 312	}
 313
 314	for (band = 0; band < NUM_NL80211_BANDS; band++) {
 315		struct ieee80211_supported_band *sband =
 316					&adapter->sbands[band];
 317
 318		kfree(sband->channels);
 319	}
 320
 321#ifdef CONFIG_RSI_DEBUGFS
 322	rsi_remove_dbgfs(adapter);
 323	kfree(adapter->dfsentry);
 324#endif
 325}
 326EXPORT_SYMBOL_GPL(rsi_mac80211_detach);
 327
 328/**
 329 * rsi_indicate_tx_status() - This function indicates the transmit status.
 330 * @adapter: Pointer to the adapter structure.
 331 * @skb: Pointer to the socket buffer structure.
 332 * @status: Status
 333 *
 334 * Return: None.
 335 */
 336void rsi_indicate_tx_status(struct rsi_hw *adapter,
 337			    struct sk_buff *skb,
 338			    int status)
 339{
 340	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 341	struct skb_info *tx_params;
 342
 343	if (!adapter->hw) {
 344		rsi_dbg(ERR_ZONE, "##### No MAC #####\n");
 345		return;
 346	}
 347
 348	if (!status)
 349		info->flags |= IEEE80211_TX_STAT_ACK;
 350
 351	tx_params = (struct skb_info *)info->driver_data;
 352	skb_pull(skb, tx_params->internal_hdr_size);
 353	memset(info->driver_data, 0, IEEE80211_TX_INFO_DRIVER_DATA_SIZE);
 354
 355	ieee80211_tx_status_irqsafe(adapter->hw, skb);
 356}
 357
 358/**
 359 * rsi_mac80211_tx() - This is the handler that 802.11 module calls for each
 360 *		       transmitted frame.SKB contains the buffer starting
 361 *		       from the IEEE 802.11 header.
 362 * @hw: Pointer to the ieee80211_hw structure.
 363 * @control: Pointer to the ieee80211_tx_control structure
 364 * @skb: Pointer to the socket buffer structure.
 365 *
 366 * Return: None
 367 */
 368static void rsi_mac80211_tx(struct ieee80211_hw *hw,
 369			    struct ieee80211_tx_control *control,
 370			    struct sk_buff *skb)
 371{
 372	struct rsi_hw *adapter = hw->priv;
 373	struct rsi_common *common = adapter->priv;
 374	struct ieee80211_hdr *wlh = (struct ieee80211_hdr *)skb->data;
 375
 376	if (ieee80211_is_auth(wlh->frame_control))
 377		common->mac_ops_resumed = false;
 378
 379	rsi_core_xmit(common, skb);
 380}
 381
 382/**
 383 * rsi_mac80211_start() - This is first handler that 802.11 module calls, since
 384 *			  the driver init is complete by then, just
 385 *			  returns success.
 386 * @hw: Pointer to the ieee80211_hw structure.
 387 *
 388 * Return: 0 as success.
 389 */
 390static int rsi_mac80211_start(struct ieee80211_hw *hw)
 391{
 392	struct rsi_hw *adapter = hw->priv;
 393	struct rsi_common *common = adapter->priv;
 394
 395	rsi_dbg(ERR_ZONE, "===> Interface UP <===\n");
 396	mutex_lock(&common->mutex);
 397	if (common->hibernate_resume) {
 398		common->reinit_hw = true;
 399		adapter->host_intf_ops->reinit_device(adapter);
 400		wait_for_completion(&adapter->priv->wlan_init_completion);
 401	}
 402	common->iface_down = false;
 403	wiphy_rfkill_start_polling(hw->wiphy);
 404	rsi_send_rx_filter_frame(common, 0);
 405	mutex_unlock(&common->mutex);
 406
 407	return 0;
 408}
 409
 410/**
 411 * rsi_mac80211_stop() - This is the last handler that 802.11 module calls.
 412 * @hw: Pointer to the ieee80211_hw structure.
 413 * @suspend: true if the this was called from suspend flow.
 414 *
 415 * Return: None.
 416 */
 417static void rsi_mac80211_stop(struct ieee80211_hw *hw, bool suspend)
 418{
 419	struct rsi_hw *adapter = hw->priv;
 420	struct rsi_common *common = adapter->priv;
 421
 422	rsi_dbg(ERR_ZONE, "===> Interface DOWN <===\n");
 423	mutex_lock(&common->mutex);
 424	common->iface_down = true;
 425	wiphy_rfkill_stop_polling(hw->wiphy);
 426
 427	/* Block all rx frames */
 428	rsi_send_rx_filter_frame(common, 0xffff);
 429
 430	mutex_unlock(&common->mutex);
 431}
 432
 433static int rsi_map_intf_mode(enum nl80211_iftype vif_type)
 434{
 435	switch (vif_type) {
 436	case NL80211_IFTYPE_STATION:
 437		return RSI_OPMODE_STA;
 438	case NL80211_IFTYPE_AP:
 439		return RSI_OPMODE_AP;
 440	case NL80211_IFTYPE_P2P_DEVICE:
 441		return RSI_OPMODE_P2P_CLIENT;
 442	case NL80211_IFTYPE_P2P_CLIENT:
 443		return RSI_OPMODE_P2P_CLIENT;
 444	case NL80211_IFTYPE_P2P_GO:
 445		return RSI_OPMODE_P2P_GO;
 446	default:
 447		return RSI_OPMODE_UNSUPPORTED;
 448	}
 449}
 450
 451/**
 452 * rsi_mac80211_add_interface() - This function is called when a netdevice
 453 *				  attached to the hardware is enabled.
 454 * @hw: Pointer to the ieee80211_hw structure.
 455 * @vif: Pointer to the ieee80211_vif structure.
 456 *
 457 * Return: ret: 0 on success, negative error code on failure.
 458 */
 459static int rsi_mac80211_add_interface(struct ieee80211_hw *hw,
 460				      struct ieee80211_vif *vif)
 461{
 462	struct rsi_hw *adapter = hw->priv;
 463	struct rsi_common *common = adapter->priv;
 464	struct vif_priv *vif_info = (struct vif_priv *)vif->drv_priv;
 465	enum opmode intf_mode;
 466	enum vap_status vap_status;
 467	int vap_idx = -1, i;
 468
 469	vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
 470	mutex_lock(&common->mutex);
 471
 472	intf_mode = rsi_map_intf_mode(vif->type);
 473	if (intf_mode == RSI_OPMODE_UNSUPPORTED) {
 474		rsi_dbg(ERR_ZONE,
 475			"%s: Interface type %d not supported\n", __func__,
 476			vif->type);
 477		mutex_unlock(&common->mutex);
 478		return -EOPNOTSUPP;
 479	}
 480	if ((vif->type == NL80211_IFTYPE_P2P_DEVICE) ||
 481	    (vif->type == NL80211_IFTYPE_P2P_CLIENT) ||
 482	    (vif->type == NL80211_IFTYPE_P2P_GO))
 483		common->p2p_enabled = true;
 484
 485	/* Get free vap index */
 486	for (i = 0; i < RSI_MAX_VIFS; i++) {
 487		if (!adapter->vifs[i] ||
 488		    !memcmp(vif->addr, adapter->vifs[i]->addr, ETH_ALEN)) {
 489			vap_idx = i;
 490			break;
 491		}
 492	}
 493	if (vap_idx < 0) {
 494		rsi_dbg(ERR_ZONE, "Reject: Max VAPs reached\n");
 495		mutex_unlock(&common->mutex);
 496		return -EOPNOTSUPP;
 497	}
 498	vif_info->vap_id = vap_idx;
 499	adapter->vifs[vap_idx] = vif;
 500	adapter->sc_nvifs++;
 501	vap_status = VAP_ADD;
 502
 503	if (rsi_set_vap_capabilities(common, intf_mode, vif->addr,
 504				     vif_info->vap_id, vap_status)) {
 505		rsi_dbg(ERR_ZONE, "Failed to set VAP capabilities\n");
 506		mutex_unlock(&common->mutex);
 507		return -EINVAL;
 508	}
 509
 510	if ((vif->type == NL80211_IFTYPE_AP) ||
 511	    (vif->type == NL80211_IFTYPE_P2P_GO)) {
 512		rsi_send_rx_filter_frame(common, DISALLOW_BEACONS);
 513		for (i = 0; i < common->max_stations; i++)
 514			common->stations[i].sta = NULL;
 515	}
 516
 517	mutex_unlock(&common->mutex);
 518
 519	return 0;
 520}
 521
 522/**
 523 * rsi_mac80211_remove_interface() - This function notifies driver that an
 524 *				     interface is going down.
 525 * @hw: Pointer to the ieee80211_hw structure.
 526 * @vif: Pointer to the ieee80211_vif structure.
 527 *
 528 * Return: None.
 529 */
 530static void rsi_mac80211_remove_interface(struct ieee80211_hw *hw,
 531					  struct ieee80211_vif *vif)
 532{
 533	struct rsi_hw *adapter = hw->priv;
 534	struct rsi_common *common = adapter->priv;
 535	enum opmode opmode;
 536	int i;
 537
 538	rsi_dbg(INFO_ZONE, "Remove Interface Called\n");
 539
 540	mutex_lock(&common->mutex);
 541
 542	if (adapter->sc_nvifs <= 0) {
 543		mutex_unlock(&common->mutex);
 544		return;
 545	}
 546
 547	opmode = rsi_map_intf_mode(vif->type);
 548	if (opmode == RSI_OPMODE_UNSUPPORTED) {
 549		rsi_dbg(ERR_ZONE, "Opmode error : %d\n", opmode);
 550		mutex_unlock(&common->mutex);
 551		return;
 552	}
 553	for (i = 0; i < RSI_MAX_VIFS; i++) {
 554		if (!adapter->vifs[i])
 555			continue;
 556		if (vif == adapter->vifs[i]) {
 557			rsi_set_vap_capabilities(common, opmode, vif->addr,
 558						 i, VAP_DELETE);
 559			adapter->sc_nvifs--;
 560			adapter->vifs[i] = NULL;
 561		}
 562	}
 563	mutex_unlock(&common->mutex);
 564}
 565
 566/**
 567 * rsi_channel_change() - This function is a performs the checks
 568 *			  required for changing a channel and sets
 569 *			  the channel accordingly.
 570 * @hw: Pointer to the ieee80211_hw structure.
 571 *
 572 * Return: 0 on success, negative error code on failure.
 573 */
 574static int rsi_channel_change(struct ieee80211_hw *hw)
 575{
 576	struct rsi_hw *adapter = hw->priv;
 577	struct rsi_common *common = adapter->priv;
 578	int status = -EOPNOTSUPP;
 579	struct ieee80211_channel *curchan = hw->conf.chandef.chan;
 580	u16 channel = curchan->hw_value;
 581	struct ieee80211_vif *vif;
 582	bool assoc = false;
 583	int i;
 584
 585	rsi_dbg(INFO_ZONE,
 586		"%s: Set channel: %d MHz type: %d channel_no %d\n",
 587		__func__, curchan->center_freq,
 588		curchan->flags, channel);
 589
 590	for (i = 0; i < RSI_MAX_VIFS; i++) {
 591		vif = adapter->vifs[i];
 592		if (!vif)
 593			continue;
 594		if (vif->type == NL80211_IFTYPE_STATION) {
 595			if (vif->cfg.assoc) {
 596				assoc = true;
 597				break;
 598			}
 599		}
 600	}
 601	if (assoc) {
 602		if (!common->hw_data_qs_blocked &&
 603		    (rsi_get_connected_channel(vif) != channel)) {
 604			rsi_dbg(INFO_ZONE, "blk data q %d\n", channel);
 605			if (!rsi_send_block_unblock_frame(common, true))
 606				common->hw_data_qs_blocked = true;
 607		}
 608	}
 609
 610	status = rsi_band_check(common, curchan);
 611	if (!status)
 612		status = rsi_set_channel(adapter->priv, curchan);
 613
 614	if (assoc) {
 615		if (common->hw_data_qs_blocked &&
 616		    (rsi_get_connected_channel(vif) == channel)) {
 617			rsi_dbg(INFO_ZONE, "unblk data q %d\n", channel);
 618			if (!rsi_send_block_unblock_frame(common, false))
 619				common->hw_data_qs_blocked = false;
 620		}
 621	}
 622
 623	return status;
 624}
 625
 626/**
 627 * rsi_config_power() - This function configures tx power to device
 628 * @hw: Pointer to the ieee80211_hw structure.
 629 *
 630 * Return: 0 on success, negative error code on failure.
 631 */
 632static int rsi_config_power(struct ieee80211_hw *hw)
 633{
 634	struct rsi_hw *adapter = hw->priv;
 635	struct rsi_common *common = adapter->priv;
 636	struct ieee80211_conf *conf = &hw->conf;
 637
 638	if (adapter->sc_nvifs <= 0) {
 639		rsi_dbg(ERR_ZONE, "%s: No virtual interface found\n", __func__);
 640		return -EINVAL;
 641	}
 642
 643	rsi_dbg(INFO_ZONE,
 644		"%s: Set tx power: %d dBM\n", __func__, conf->power_level);
 645
 646	if (conf->power_level == common->tx_power)
 647		return 0;
 648
 649	common->tx_power = conf->power_level;
 650
 651	return rsi_send_radio_params_update(common);
 652}
 653
 654/**
 655 * rsi_mac80211_config() - This function is a handler for configuration
 656 *			   requests. The stack calls this function to
 657 *			   change hardware configuration, e.g., channel.
 658 * @hw: Pointer to the ieee80211_hw structure.
 659 * @radio_idx: Radio index.
 660 * @changed: Changed flags set.
 661 *
 662 * Return: 0 on success, negative error code on failure.
 663 */
 664static int rsi_mac80211_config(struct ieee80211_hw *hw,
 665			       int radio_idx,
 666			       u32 changed)
 667{
 668	struct rsi_hw *adapter = hw->priv;
 669	struct rsi_common *common = adapter->priv;
 670	struct ieee80211_conf *conf = &hw->conf;
 671	int status = 0;
 672
 673	mutex_lock(&common->mutex);
 674
 675	if (changed & IEEE80211_CONF_CHANGE_CHANNEL)
 676		status = rsi_channel_change(hw);
 677
 678	/* tx power */
 679	if (changed & IEEE80211_CONF_CHANGE_POWER) {
 680		rsi_dbg(INFO_ZONE, "%s: Configuring Power\n", __func__);
 681		status = rsi_config_power(hw);
 682	}
 683
 684	/* Power save parameters */
 685	if ((changed & IEEE80211_CONF_CHANGE_PS) &&
 686	    !common->mac_ops_resumed) {
 687		struct ieee80211_vif *vif, *sta_vif = NULL;
 688		unsigned long flags;
 689		int i, set_ps = 1;
 690
 691		for (i = 0; i < RSI_MAX_VIFS; i++) {
 692			vif = adapter->vifs[i];
 693			if (!vif)
 694				continue;
 695			/* Don't go to power save if AP vap exists */
 696			if ((vif->type == NL80211_IFTYPE_AP) ||
 697			    (vif->type == NL80211_IFTYPE_P2P_GO)) {
 698				set_ps = 0;
 699				break;
 700			}
 701			if ((vif->type == NL80211_IFTYPE_STATION ||
 702			     vif->type == NL80211_IFTYPE_P2P_CLIENT) &&
 703			    (!sta_vif || vif->cfg.assoc))
 704				sta_vif = vif;
 705		}
 706		if (set_ps && sta_vif) {
 707			spin_lock_irqsave(&adapter->ps_lock, flags);
 708			if (conf->flags & IEEE80211_CONF_PS)
 709				rsi_enable_ps(adapter, sta_vif);
 710			else
 711				rsi_disable_ps(adapter, sta_vif);
 712			spin_unlock_irqrestore(&adapter->ps_lock, flags);
 713		}
 714	}
 715
 716	/* RTS threshold */
 717	if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
 718		rsi_dbg(INFO_ZONE, "RTS threshold\n");
 719		if ((common->rts_threshold) <= IEEE80211_MAX_RTS_THRESHOLD) {
 720			rsi_dbg(INFO_ZONE,
 721				"%s: Sending vap updates....\n", __func__);
 722			status = rsi_send_vap_dynamic_update(common);
 723		}
 724	}
 725	mutex_unlock(&common->mutex);
 726
 727	return status;
 728}
 729
 730/**
 731 * rsi_get_connected_channel() - This function is used to get the current
 732 *				 connected channel number.
 733 * @vif: Pointer to the ieee80211_vif structure.
 734 *
 735 * Return: Current connected AP's channel number is returned.
 736 */
 737u16 rsi_get_connected_channel(struct ieee80211_vif *vif)
 738{
 739	struct ieee80211_bss_conf *bss;
 740	struct ieee80211_channel *channel;
 741
 742	if (!vif)
 743		return 0;
 744
 745	bss = &vif->bss_conf;
 746	channel = bss->chanreq.oper.chan;
 747
 748	if (!channel)
 749		return 0;
 750
 751	return channel->hw_value;
 752}
 753
 754static void rsi_switch_channel(struct rsi_hw *adapter,
 755			       struct ieee80211_vif *vif)
 756{
 757	struct rsi_common *common = adapter->priv;
 758	struct ieee80211_channel *channel;
 759
 760	if (common->iface_down)
 761		return;
 762	if (!vif)
 763		return;
 764
 765	channel = vif->bss_conf.chanreq.oper.chan;
 766
 767	if (!channel)
 768		return;
 769
 770	rsi_band_check(common, channel);
 771	rsi_set_channel(common, channel);
 772	rsi_dbg(INFO_ZONE, "Switched to channel - %d\n", channel->hw_value);
 773}
 774
 775/**
 776 * rsi_mac80211_bss_info_changed() - This function is a handler for config
 777 *				     requests related to BSS parameters that
 778 *				     may vary during BSS's lifespan.
 779 * @hw: Pointer to the ieee80211_hw structure.
 780 * @vif: Pointer to the ieee80211_vif structure.
 781 * @bss_conf: Pointer to the ieee80211_bss_conf structure.
 782 * @changed: Changed flags set.
 783 *
 784 * Return: None.
 785 */
 786static void rsi_mac80211_bss_info_changed(struct ieee80211_hw *hw,
 787					  struct ieee80211_vif *vif,
 788					  struct ieee80211_bss_conf *bss_conf,
 789					  u64 changed)
 790{
 791	struct rsi_hw *adapter = hw->priv;
 792	struct rsi_common *common = adapter->priv;
 793	struct ieee80211_bss_conf *bss = &vif->bss_conf;
 794	struct ieee80211_conf *conf = &hw->conf;
 795	u16 rx_filter_word = 0;
 796
 797	mutex_lock(&common->mutex);
 798	if (changed & BSS_CHANGED_ASSOC) {
 799		rsi_dbg(INFO_ZONE, "%s: Changed Association status: %d\n",
 800			__func__, vif->cfg.assoc);
 801		if (vif->cfg.assoc) {
 802			/* Send the RX filter frame */
 803			rx_filter_word = (ALLOW_DATA_ASSOC_PEER |
 804					  ALLOW_CTRL_ASSOC_PEER |
 805					  ALLOW_MGMT_ASSOC_PEER);
 806			rsi_send_rx_filter_frame(common, rx_filter_word);
 807		}
 808		rsi_inform_bss_status(common,
 809				      RSI_OPMODE_STA,
 810				      vif->cfg.assoc,
 811				      bss_conf->bssid,
 812				      bss_conf->qos,
 813				      vif->cfg.aid,
 814				      NULL, 0,
 815				      bss_conf->assoc_capability, vif);
 816		adapter->ps_info.dtim_interval_duration = bss->dtim_period;
 817		adapter->ps_info.listen_interval = conf->listen_interval;
 818
 819		/* If U-APSD is updated, send ps parameters to firmware */
 820		if (vif->cfg.assoc) {
 821			if (common->uapsd_bitmap) {
 822				rsi_dbg(INFO_ZONE, "Configuring UAPSD\n");
 823				rsi_conf_uapsd(adapter, vif);
 824			}
 825		} else {
 826			common->uapsd_bitmap = 0;
 827		}
 828	}
 829
 830	if (changed & BSS_CHANGED_CQM) {
 831		common->cqm_info.last_cqm_event_rssi = 0;
 832		common->cqm_info.rssi_thold = bss_conf->cqm_rssi_thold;
 833		common->cqm_info.rssi_hyst = bss_conf->cqm_rssi_hyst;
 834		rsi_dbg(INFO_ZONE, "RSSI threshold & hysteresis are: %d %d\n",
 835			common->cqm_info.rssi_thold,
 836			common->cqm_info.rssi_hyst);
 837	}
 838
 839	if (changed & BSS_CHANGED_BEACON_INT) {
 840		rsi_dbg(INFO_ZONE, "%s: Changed Beacon interval: %d\n",
 841			__func__, bss_conf->beacon_int);
 842		if (common->beacon_interval != bss->beacon_int) {
 843			common->beacon_interval = bss->beacon_int;
 844			if (vif->type == NL80211_IFTYPE_AP) {
 845				struct vif_priv *vif_info = (struct vif_priv *)vif->drv_priv;
 846
 847				rsi_set_vap_capabilities(common, RSI_OPMODE_AP,
 848							 vif->addr, vif_info->vap_id,
 849							 VAP_UPDATE);
 850			}
 851		}
 852		adapter->ps_info.listen_interval =
 853			bss->beacon_int * adapter->ps_info.num_bcns_per_lis_int;
 854	}
 855
 856	if ((changed & BSS_CHANGED_BEACON_ENABLED) &&
 857	    ((vif->type == NL80211_IFTYPE_AP) ||
 858	     (vif->type == NL80211_IFTYPE_P2P_GO))) {
 859		if (bss->enable_beacon) {
 860			rsi_dbg(INFO_ZONE, "===> BEACON ENABLED <===\n");
 861			common->beacon_enabled = 1;
 862		} else {
 863			rsi_dbg(INFO_ZONE, "===> BEACON DISABLED <===\n");
 864			common->beacon_enabled = 0;
 865		}
 866	}
 867
 868	mutex_unlock(&common->mutex);
 869}
 870
 871/**
 872 * rsi_mac80211_conf_filter() - This function configure the device's RX filter.
 873 * @hw: Pointer to the ieee80211_hw structure.
 874 * @changed_flags: Changed flags set.
 875 * @total_flags: Total initial flags set.
 876 * @multicast: Multicast.
 877 *
 878 * Return: None.
 879 */
 880static void rsi_mac80211_conf_filter(struct ieee80211_hw *hw,
 881				     u32 changed_flags,
 882				     u32 *total_flags,
 883				     u64 multicast)
 884{
 885	/* Not doing much here as of now */
 886	*total_flags &= RSI_SUPP_FILTERS;
 887}
 888
 889/**
 890 * rsi_mac80211_conf_tx() - This function configures TX queue parameters
 891 *			    (EDCF (aifs, cw_min, cw_max), bursting)
 892 *			    for a hardware TX queue.
 893 * @hw: Pointer to the ieee80211_hw structure
 894 * @vif: Pointer to the ieee80211_vif structure.
 895 * @link_id: the link ID if MLO is used, otherwise 0
 896 * @queue: Queue number.
 897 * @params: Pointer to ieee80211_tx_queue_params structure.
 898 *
 899 * Return: 0 on success, negative error code on failure.
 900 */
 901static int rsi_mac80211_conf_tx(struct ieee80211_hw *hw,
 902				struct ieee80211_vif *vif,
 903				unsigned int link_id, u16 queue,
 904				const struct ieee80211_tx_queue_params *params)
 905{
 906	struct rsi_hw *adapter = hw->priv;
 907	struct rsi_common *common = adapter->priv;
 908	u8 idx = 0;
 909
 910	if (queue >= IEEE80211_NUM_ACS)
 911		return 0;
 912
 913	rsi_dbg(INFO_ZONE,
 914		"%s: Conf queue %d, aifs: %d, cwmin: %d cwmax: %d, txop: %d\n",
 915		__func__, queue, params->aifs,
 916		params->cw_min, params->cw_max, params->txop);
 917
 918	mutex_lock(&common->mutex);
 919	/* Map into the way the f/w expects */
 920	switch (queue) {
 921	case IEEE80211_AC_VO:
 922		idx = VO_Q;
 923		break;
 924	case IEEE80211_AC_VI:
 925		idx = VI_Q;
 926		break;
 927	case IEEE80211_AC_BE:
 928		idx = BE_Q;
 929		break;
 930	case IEEE80211_AC_BK:
 931		idx = BK_Q;
 932		break;
 933	default:
 934		idx = BE_Q;
 935		break;
 936	}
 937
 938	memcpy(&common->edca_params[idx],
 939	       params,
 940	       sizeof(struct ieee80211_tx_queue_params));
 941
 942	if (params->uapsd)
 943		common->uapsd_bitmap |= idx;
 944	else
 945		common->uapsd_bitmap &= (~idx);
 946
 947	mutex_unlock(&common->mutex);
 948
 949	return 0;
 950}
 951
 952/**
 953 * rsi_hal_key_config() - This function loads the keys into the firmware.
 954 * @hw: Pointer to the ieee80211_hw structure.
 955 * @vif: Pointer to the ieee80211_vif structure.
 956 * @key: Pointer to the ieee80211_key_conf structure.
 957 * @sta: Pointer to the ieee80211_sta structure.
 958 *
 959 * Return: status: 0 on success, negative error codes on failure.
 960 */
 961static int rsi_hal_key_config(struct ieee80211_hw *hw,
 962			      struct ieee80211_vif *vif,
 963			      struct ieee80211_key_conf *key,
 964			      struct ieee80211_sta *sta)
 965{
 966	struct rsi_hw *adapter = hw->priv;
 967	struct rsi_sta *rsta = NULL;
 968	int status;
 969	u8 key_type;
 970	s16 sta_id = 0;
 971
 972	if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
 973		key_type = RSI_PAIRWISE_KEY;
 974	else
 975		key_type = RSI_GROUP_KEY;
 976
 977	rsi_dbg(ERR_ZONE, "%s: Cipher 0x%x key_type: %d key_len: %d\n",
 978		__func__, key->cipher, key_type, key->keylen);
 979
 980	if ((vif->type == NL80211_IFTYPE_AP) ||
 981	    (vif->type == NL80211_IFTYPE_P2P_GO)) {
 982		if (sta) {
 983			rsta = rsi_find_sta(adapter->priv, sta->addr);
 984			if (rsta)
 985				sta_id = rsta->sta_id;
 986		}
 987		adapter->priv->key = key;
 988	} else {
 989		if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
 990		    (key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
 991			status = rsi_hal_load_key(adapter->priv,
 992						  key->key,
 993						  key->keylen,
 994						  RSI_PAIRWISE_KEY,
 995						  key->keyidx,
 996						  key->cipher,
 997						  sta_id,
 998						  vif);
 999			if (status)
1000				return status;
1001		}
1002	}
1003
1004	status = rsi_hal_load_key(adapter->priv,
1005				  key->key,
1006				  key->keylen,
1007				  key_type,
1008				  key->keyidx,
1009				  key->cipher,
1010				  sta_id,
1011				  vif);
1012	if (status)
1013		return status;
1014
1015	if (vif->type == NL80211_IFTYPE_STATION &&
1016	    (key->cipher == WLAN_CIPHER_SUITE_WEP104 ||
1017	     key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
1018		if (!rsi_send_block_unblock_frame(adapter->priv, false))
1019			adapter->priv->hw_data_qs_blocked = false;
1020	}
1021
1022	return 0;
1023}
1024
1025/**
1026 * rsi_mac80211_set_key() - This function sets type of key to be loaded.
1027 * @hw: Pointer to the ieee80211_hw structure.
1028 * @cmd: enum set_key_cmd.
1029 * @vif: Pointer to the ieee80211_vif structure.
1030 * @sta: Pointer to the ieee80211_sta structure.
1031 * @key: Pointer to the ieee80211_key_conf structure.
1032 *
1033 * Return: status: 0 on success, negative error code on failure.
1034 */
1035static int rsi_mac80211_set_key(struct ieee80211_hw *hw,
1036				enum set_key_cmd cmd,
1037				struct ieee80211_vif *vif,
1038				struct ieee80211_sta *sta,
1039				struct ieee80211_key_conf *key)
1040{
1041	struct rsi_hw *adapter = hw->priv;
1042	struct rsi_common *common = adapter->priv;
1043	struct security_info *secinfo = &common->secinfo;
1044	int status;
1045
1046	mutex_lock(&common->mutex);
1047	switch (cmd) {
1048	case SET_KEY:
1049		status = rsi_hal_key_config(hw, vif, key, sta);
1050		if (status) {
1051			mutex_unlock(&common->mutex);
1052			return status;
1053		}
1054
1055		if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
1056			secinfo->ptk_cipher = key->cipher;
1057		else
1058			secinfo->gtk_cipher = key->cipher;
1059
1060		key->hw_key_idx = key->keyidx;
1061		key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1062
1063		rsi_dbg(ERR_ZONE, "%s: RSI set_key\n", __func__);
1064		break;
1065
1066	case DISABLE_KEY:
1067		rsi_dbg(ERR_ZONE, "%s: RSI del key\n", __func__);
1068		memset(key, 0, sizeof(struct ieee80211_key_conf));
1069		status = rsi_hal_key_config(hw, vif, key, sta);
1070		break;
1071
1072	default:
1073		status = -EOPNOTSUPP;
1074		break;
1075	}
1076
1077	mutex_unlock(&common->mutex);
1078	return status;
1079}
1080
1081/**
1082 * rsi_mac80211_ampdu_action() - This function selects the AMPDU action for
1083 *				 the corresponding mlme_action flag and
1084 *				 informs the f/w regarding this.
1085 * @hw: Pointer to the ieee80211_hw structure.
1086 * @vif: Pointer to the ieee80211_vif structure.
1087 * @params: Pointer to A-MPDU action parameters
1088 *
1089 * Return: status: 0 on success, negative error code on failure.
1090 */
1091static int rsi_mac80211_ampdu_action(struct ieee80211_hw *hw,
1092				     struct ieee80211_vif *vif,
1093				     struct ieee80211_ampdu_params *params)
1094{
1095	int status = -EOPNOTSUPP;
1096	struct rsi_hw *adapter = hw->priv;
1097	struct rsi_common *common = adapter->priv;
1098	struct rsi_sta *rsta = NULL;
1099	u16 seq_no = 0, seq_start = 0;
1100	u8 ii = 0;
1101	struct ieee80211_sta *sta = params->sta;
1102	u8 sta_id = 0;
1103	enum ieee80211_ampdu_mlme_action action = params->action;
1104	u16 tid = params->tid;
1105	u16 *ssn = &params->ssn;
1106	u8 buf_size = params->buf_size;
1107
1108	for (ii = 0; ii < RSI_MAX_VIFS; ii++) {
1109		if (vif == adapter->vifs[ii])
1110			break;
1111	}
1112
1113	if (ii >= RSI_MAX_VIFS)
1114		return status;
1115
1116	mutex_lock(&common->mutex);
1117
1118	if (ssn != NULL)
1119		seq_no = *ssn;
1120
1121	if ((vif->type == NL80211_IFTYPE_AP) ||
1122	    (vif->type == NL80211_IFTYPE_P2P_GO)) {
1123		rsta = rsi_find_sta(common, sta->addr);
1124		if (!rsta) {
1125			rsi_dbg(ERR_ZONE, "No station mapped\n");
1126			status = 0;
1127			goto unlock;
1128		}
1129		sta_id = rsta->sta_id;
1130	}
1131
1132	rsi_dbg(INFO_ZONE,
1133		"%s: AMPDU action tid=%d ssn=0x%x, buf_size=%d sta_id=%d\n",
1134		__func__, tid, seq_no, buf_size, sta_id);
1135
1136	switch (action) {
1137	case IEEE80211_AMPDU_RX_START:
1138		status = rsi_send_aggregation_params_frame(common,
1139							   tid,
1140							   seq_no,
1141							   buf_size,
1142							   STA_RX_ADDBA_DONE,
1143							   sta_id);
1144		break;
1145
1146	case IEEE80211_AMPDU_RX_STOP:
1147		status = rsi_send_aggregation_params_frame(common,
1148							   tid,
1149							   0,
1150							   buf_size,
1151							   STA_RX_DELBA,
1152							   sta_id);
1153		break;
1154
1155	case IEEE80211_AMPDU_TX_START:
1156		if ((vif->type == NL80211_IFTYPE_STATION) ||
1157		    (vif->type == NL80211_IFTYPE_P2P_CLIENT))
1158			common->vif_info[ii].seq_start = seq_no;
1159		else if ((vif->type == NL80211_IFTYPE_AP) ||
1160			 (vif->type == NL80211_IFTYPE_P2P_GO))
1161			rsta->seq_start[tid] = seq_no;
1162		status = IEEE80211_AMPDU_TX_START_IMMEDIATE;
1163		break;
1164
1165	case IEEE80211_AMPDU_TX_STOP_CONT:
1166	case IEEE80211_AMPDU_TX_STOP_FLUSH:
1167	case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1168		status = rsi_send_aggregation_params_frame(common,
1169							   tid,
1170							   seq_no,
1171							   buf_size,
1172							   STA_TX_DELBA,
1173							   sta_id);
1174		if (!status)
1175			ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1176		break;
1177
1178	case IEEE80211_AMPDU_TX_OPERATIONAL:
1179		if ((vif->type == NL80211_IFTYPE_STATION) ||
1180		    (vif->type == NL80211_IFTYPE_P2P_CLIENT))
1181			seq_start = common->vif_info[ii].seq_start;
1182		else if ((vif->type == NL80211_IFTYPE_AP) ||
1183			 (vif->type == NL80211_IFTYPE_P2P_GO))
1184			seq_start = rsta->seq_start[tid];
1185		status = rsi_send_aggregation_params_frame(common,
1186							   tid,
1187							   seq_start,
1188							   buf_size,
1189							   STA_TX_ADDBA_DONE,
1190							   sta_id);
1191		break;
1192
1193	default:
1194		rsi_dbg(ERR_ZONE, "%s: Unknown AMPDU action\n", __func__);
1195		break;
1196	}
1197
1198unlock:
1199	mutex_unlock(&common->mutex);
1200	return status;
1201}
1202
1203/**
1204 * rsi_mac80211_set_rts_threshold() - This function sets rts threshold value.
1205 * @hw: Pointer to the ieee80211_hw structure.
1206 * @radio_idx: Radio index.
1207 * @value: Rts threshold value.
1208 *
1209 * Return: 0 on success.
1210 */
1211static int rsi_mac80211_set_rts_threshold(struct ieee80211_hw *hw,
1212					  int radio_idx, u32 value)
1213{
1214	struct rsi_hw *adapter = hw->priv;
1215	struct rsi_common *common = adapter->priv;
1216
1217	mutex_lock(&common->mutex);
1218	common->rts_threshold = value;
1219	mutex_unlock(&common->mutex);
1220
1221	return 0;
1222}
1223
1224/**
1225 * rsi_mac80211_set_rate_mask() - This function sets bitrate_mask to be used.
1226 * @hw: Pointer to the ieee80211_hw structure
1227 * @vif: Pointer to the ieee80211_vif structure.
1228 * @mask: Pointer to the cfg80211_bitrate_mask structure.
1229 *
1230 * Return: 0 on success.
1231 */
1232static int rsi_mac80211_set_rate_mask(struct ieee80211_hw *hw,
1233				      struct ieee80211_vif *vif,
1234				      const struct cfg80211_bitrate_mask *mask)
1235{
1236	const unsigned int mcs_offset = ARRAY_SIZE(rsi_rates);
1237	struct rsi_hw *adapter = hw->priv;
1238	struct rsi_common *common = adapter->priv;
1239	int i;
1240
1241	mutex_lock(&common->mutex);
1242
1243	for (i = 0; i < ARRAY_SIZE(common->rate_config); i++) {
1244		struct rsi_rate_config *cfg = &common->rate_config[i];
1245		u32 bm;
1246
1247		bm = mask->control[i].legacy | (mask->control[i].ht_mcs[0] << mcs_offset);
1248		if (hweight32(bm) == 1) { /* single rate */
1249			int rate_index = ffs(bm) - 1;
1250
1251			if (rate_index < mcs_offset)
1252				cfg->fixed_hw_rate = rsi_rates[rate_index].hw_value;
1253			else
1254				cfg->fixed_hw_rate = rsi_mcsrates[rate_index - mcs_offset];
1255			cfg->fixed_enabled = true;
1256		} else {
1257			cfg->configured_mask = bm;
1258			cfg->fixed_enabled = false;
1259		}
1260	}
1261
1262	mutex_unlock(&common->mutex);
1263
1264	return 0;
1265}
1266
1267/**
1268 * rsi_perform_cqm() - This function performs cqm.
1269 * @common: Pointer to the driver private structure.
1270 * @bssid: pointer to the bssid.
1271 * @rssi: RSSI value.
1272 * @vif: Pointer to the ieee80211_vif structure.
1273 */
1274static void rsi_perform_cqm(struct rsi_common *common,
1275			    u8 *bssid,
1276			    s8 rssi,
1277			    struct ieee80211_vif *vif)
1278{
1279	s8 last_event = common->cqm_info.last_cqm_event_rssi;
1280	int thold = common->cqm_info.rssi_thold;
1281	u32 hyst = common->cqm_info.rssi_hyst;
1282	enum nl80211_cqm_rssi_threshold_event event;
1283
1284	if (rssi < thold && (last_event == 0 || rssi < (last_event - hyst)))
1285		event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
1286	else if (rssi > thold &&
1287		 (last_event == 0 || rssi > (last_event + hyst)))
1288		event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
1289	else
1290		return;
1291
1292	common->cqm_info.last_cqm_event_rssi = rssi;
1293	rsi_dbg(INFO_ZONE, "CQM: Notifying event: %d\n", event);
1294	ieee80211_cqm_rssi_notify(vif, event, rssi, GFP_KERNEL);
1295
1296	return;
1297}
1298
1299/**
1300 * rsi_fill_rx_status() - This function fills rx status in
1301 *			  ieee80211_rx_status structure.
1302 * @hw: Pointer to the ieee80211_hw structure.
1303 * @skb: Pointer to the socket buffer structure.
1304 * @common: Pointer to the driver private structure.
1305 * @rxs: Pointer to the ieee80211_rx_status structure.
1306 *
1307 * Return: None.
1308 */
1309static void rsi_fill_rx_status(struct ieee80211_hw *hw,
1310			       struct sk_buff *skb,
1311			       struct rsi_common *common,
1312			       struct ieee80211_rx_status *rxs)
1313{
1314	struct rsi_hw *adapter = common->priv;
1315	struct ieee80211_vif *vif;
1316	struct ieee80211_bss_conf *bss = NULL;
1317	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1318	struct skb_info *rx_params = (struct skb_info *)info->driver_data;
1319	struct ieee80211_hdr *hdr;
1320	char rssi = rx_params->rssi;
1321	u8 hdrlen = 0;
1322	u8 channel = rx_params->channel;
1323	s32 freq;
1324	int i;
1325
1326	hdr = ((struct ieee80211_hdr *)(skb->data));
1327	hdrlen = ieee80211_hdrlen(hdr->frame_control);
1328
1329	memset(info, 0, sizeof(struct ieee80211_tx_info));
1330
1331	rxs->signal = -(rssi);
1332
1333	rxs->band = common->band;
1334
1335	freq = ieee80211_channel_to_frequency(channel, rxs->band);
1336
1337	if (freq)
1338		rxs->freq = freq;
1339
1340	if (ieee80211_has_protected(hdr->frame_control)) {
1341		if (rsi_is_cipher_wep(common)) {
1342			memmove(skb->data + 4, skb->data, hdrlen);
1343			skb_pull(skb, 4);
1344		} else {
1345			memmove(skb->data + 8, skb->data, hdrlen);
1346			skb_pull(skb, 8);
1347			rxs->flag |= RX_FLAG_MMIC_STRIPPED;
1348		}
1349		rxs->flag |= RX_FLAG_DECRYPTED;
1350		rxs->flag |= RX_FLAG_IV_STRIPPED;
1351	}
1352
1353	for (i = 0; i < RSI_MAX_VIFS; i++) {
1354		vif = adapter->vifs[i];
1355		if (!vif)
1356			continue;
1357		if (vif->type == NL80211_IFTYPE_STATION) {
1358			bss = &vif->bss_conf;
1359			break;
1360		}
1361	}
1362	if (!bss)
1363		return;
1364	/* CQM only for connected AP beacons, the RSSI is a weighted avg */
1365	if (vif->cfg.assoc && !(memcmp(bss->bssid, hdr->addr2, ETH_ALEN))) {
1366		if (ieee80211_is_beacon(hdr->frame_control))
1367			rsi_perform_cqm(common, hdr->addr2, rxs->signal, vif);
1368	}
1369
1370	return;
1371}
1372
1373/**
1374 * rsi_indicate_pkt_to_os() - This function sends received packet to mac80211.
1375 * @common: Pointer to the driver private structure.
1376 * @skb: Pointer to the socket buffer structure.
1377 *
1378 * Return: None.
1379 */
1380void rsi_indicate_pkt_to_os(struct rsi_common *common,
1381			    struct sk_buff *skb)
1382{
1383	struct rsi_hw *adapter = common->priv;
1384	struct ieee80211_hw *hw = adapter->hw;
1385	struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
1386
1387	if ((common->iface_down) || (!adapter->sc_nvifs)) {
1388		dev_kfree_skb(skb);
1389		return;
1390	}
1391
1392	/* filling in the ieee80211_rx_status flags */
1393	rsi_fill_rx_status(hw, skb, common, rx_status);
1394
1395	ieee80211_rx_irqsafe(hw, skb);
1396}
1397
1398/**
1399 * rsi_mac80211_sta_add() - This function notifies driver about a peer getting
1400 *			    connected.
1401 * @hw: pointer to the ieee80211_hw structure.
1402 * @vif: Pointer to the ieee80211_vif structure.
1403 * @sta: Pointer to the ieee80211_sta structure.
1404 *
1405 * Return: 0 on success, negative error codes on failure.
1406 */
1407static int rsi_mac80211_sta_add(struct ieee80211_hw *hw,
1408				struct ieee80211_vif *vif,
1409				struct ieee80211_sta *sta)
1410{
1411	struct rsi_hw *adapter = hw->priv;
1412	struct rsi_common *common = adapter->priv;
1413	bool sta_exist = false;
1414	struct rsi_sta *rsta;
1415	int status = 0;
1416
1417	rsi_dbg(INFO_ZONE, "Station Add: %pM\n", sta->addr);
1418
1419	mutex_lock(&common->mutex);
1420
1421	if ((vif->type == NL80211_IFTYPE_AP) ||
1422	    (vif->type == NL80211_IFTYPE_P2P_GO)) {
1423		u8 cnt;
1424		int sta_idx = -1;
1425		int free_index = -1;
1426
1427		/* Check if max stations reached */
1428		if (common->num_stations >= common->max_stations) {
1429			rsi_dbg(ERR_ZONE, "Reject: Max Stations exists\n");
1430			status = -EOPNOTSUPP;
1431			goto unlock;
1432		}
1433		for (cnt = 0; cnt < common->max_stations; cnt++) {
1434			rsta = &common->stations[cnt];
1435
1436			if (!rsta->sta) {
1437				if (free_index < 0)
1438					free_index = cnt;
1439				continue;
1440			}
1441			if (!memcmp(rsta->sta->addr, sta->addr, ETH_ALEN)) {
1442				rsi_dbg(INFO_ZONE, "Station exists\n");
1443				sta_idx = cnt;
1444				sta_exist = true;
1445				break;
1446			}
1447		}
1448		if (!sta_exist) {
1449			if (free_index >= 0)
1450				sta_idx = free_index;
1451		}
1452		if (sta_idx < 0) {
1453			rsi_dbg(ERR_ZONE,
1454				"%s: Some problem reaching here...\n",
1455				__func__);
1456			status = -EINVAL;
1457			goto unlock;
1458		}
1459		rsta = &common->stations[sta_idx];
1460		rsta->sta = sta;
1461		rsta->sta_id = sta_idx;
1462		for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1463			rsta->start_tx_aggr[cnt] = false;
1464		for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1465			rsta->seq_start[cnt] = 0;
1466		if (!sta_exist) {
1467			rsi_dbg(INFO_ZONE, "New Station\n");
1468
1469			/* Send peer notify to device */
1470			rsi_dbg(INFO_ZONE, "Indicate bss status to device\n");
1471			rsi_inform_bss_status(common, RSI_OPMODE_AP, 1,
1472					      sta->addr, sta->wme, sta->aid,
1473					      sta, sta_idx, 0, vif);
1474
1475			if (common->key) {
1476				struct ieee80211_key_conf *key = common->key;
1477
1478				if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
1479				    (key->cipher == WLAN_CIPHER_SUITE_WEP40))
1480					rsi_hal_load_key(adapter->priv,
1481							 key->key,
1482							 key->keylen,
1483							 RSI_PAIRWISE_KEY,
1484							 key->keyidx,
1485							 key->cipher,
1486							 sta_idx,
1487							 vif);
1488			}
1489
1490			common->num_stations++;
1491		}
1492	}
1493
1494	if ((vif->type == NL80211_IFTYPE_STATION) ||
1495	    (vif->type == NL80211_IFTYPE_P2P_CLIENT)) {
1496		common->bitrate_mask[common->band] = sta->deflink.supp_rates[common->band];
1497		common->vif_info[0].is_ht = sta->deflink.ht_cap.ht_supported;
1498		if (sta->deflink.ht_cap.ht_supported) {
1499			common->bitrate_mask[NL80211_BAND_2GHZ] =
1500					sta->deflink.supp_rates[NL80211_BAND_2GHZ];
1501			if ((sta->deflink.ht_cap.cap & IEEE80211_HT_CAP_SGI_20) ||
1502			    (sta->deflink.ht_cap.cap & IEEE80211_HT_CAP_SGI_40))
1503				common->vif_info[0].sgi = true;
1504			ieee80211_start_tx_ba_session(sta, 0, 0);
1505		}
1506	}
1507
1508unlock:
1509	mutex_unlock(&common->mutex);
1510
1511	return status;
1512}
1513
1514/**
1515 * rsi_mac80211_sta_remove() - This function notifies driver about a peer
1516 *			       getting disconnected.
1517 * @hw: Pointer to the ieee80211_hw structure.
1518 * @vif: Pointer to the ieee80211_vif structure.
1519 * @sta: Pointer to the ieee80211_sta structure.
1520 *
1521 * Return: 0 on success, negative error codes on failure.
1522 */
1523static int rsi_mac80211_sta_remove(struct ieee80211_hw *hw,
1524				   struct ieee80211_vif *vif,
1525				   struct ieee80211_sta *sta)
1526{
1527	struct rsi_hw *adapter = hw->priv;
1528	struct rsi_common *common = adapter->priv;
1529	struct ieee80211_bss_conf *bss = &vif->bss_conf;
1530	struct rsi_sta *rsta;
1531
1532	rsi_dbg(INFO_ZONE, "Station Remove: %pM\n", sta->addr);
1533
1534	mutex_lock(&common->mutex);
1535
1536	if ((vif->type == NL80211_IFTYPE_AP) ||
1537	    (vif->type == NL80211_IFTYPE_P2P_GO)) {
1538		u8 sta_idx, cnt;
1539
1540		/* Send peer notify to device */
1541		rsi_dbg(INFO_ZONE, "Indicate bss status to device\n");
1542		for (sta_idx = 0; sta_idx < common->max_stations; sta_idx++) {
1543			rsta = &common->stations[sta_idx];
1544
1545			if (!rsta->sta)
1546				continue;
1547			if (!memcmp(rsta->sta->addr, sta->addr, ETH_ALEN)) {
1548				rsi_inform_bss_status(common, RSI_OPMODE_AP, 0,
1549						      sta->addr, sta->wme,
1550						      sta->aid, sta, sta_idx,
1551						      0, vif);
1552				rsta->sta = NULL;
1553				rsta->sta_id = -1;
1554				for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1555					rsta->start_tx_aggr[cnt] = false;
1556				if (common->num_stations > 0)
1557					common->num_stations--;
1558				break;
1559			}
1560		}
1561		if (sta_idx >= common->max_stations)
1562			rsi_dbg(ERR_ZONE, "%s: No station found\n", __func__);
1563	}
1564
1565	if ((vif->type == NL80211_IFTYPE_STATION) ||
1566	    (vif->type == NL80211_IFTYPE_P2P_CLIENT)) {
1567		/* Resetting all the fields to default values */
1568		memcpy((u8 *)bss->bssid, (u8 *)sta->addr, ETH_ALEN);
1569		bss->qos = sta->wme;
1570		common->bitrate_mask[NL80211_BAND_2GHZ] = 0;
1571		common->bitrate_mask[NL80211_BAND_5GHZ] = 0;
1572		common->vif_info[0].is_ht = false;
1573		common->vif_info[0].sgi = false;
1574		common->vif_info[0].seq_start = 0;
1575		common->secinfo.ptk_cipher = 0;
1576		common->secinfo.gtk_cipher = 0;
1577		if (!common->iface_down)
1578			rsi_send_rx_filter_frame(common, 0);
1579	}
1580	mutex_unlock(&common->mutex);
1581	
1582	return 0;
1583}
1584
1585/**
1586 * rsi_mac80211_set_antenna() - This function is used to configure
1587 *				tx and rx antennas.
1588 * @hw: Pointer to the ieee80211_hw structure.
1589 * @radio_idx: Radio index
1590 * @tx_ant: Bitmap for tx antenna
1591 * @rx_ant: Bitmap for rx antenna
1592 *
1593 * Return: 0 on success, Negative error code on failure.
1594 */
1595static int rsi_mac80211_set_antenna(struct ieee80211_hw *hw,
1596				    int radio_idx,
1597				    u32 tx_ant, u32 rx_ant)
1598{
1599	struct rsi_hw *adapter = hw->priv;
1600	struct rsi_common *common = adapter->priv;
1601	u8 antenna = 0;
1602
1603	if (tx_ant > 1 || rx_ant > 1) {
1604		rsi_dbg(ERR_ZONE,
1605			"Invalid antenna selection (tx: %d, rx:%d)\n",
1606			tx_ant, rx_ant);
1607		rsi_dbg(ERR_ZONE,
1608			"Use 0 for int_ant, 1 for ext_ant\n");
1609		return -EINVAL; 
1610	}
1611
1612	rsi_dbg(INFO_ZONE, "%s: Antenna map Tx %x Rx %d\n",
1613			__func__, tx_ant, rx_ant);
1614
1615	mutex_lock(&common->mutex);
1616
1617	antenna = tx_ant ? ANTENNA_SEL_UFL : ANTENNA_SEL_INT;
1618	if (common->ant_in_use != antenna)
1619		if (rsi_set_antenna(common, antenna))
1620			goto fail_set_antenna;
1621
1622	rsi_dbg(INFO_ZONE, "(%s) Antenna path configured successfully\n",
1623		tx_ant ? "UFL" : "INT");
1624
1625	common->ant_in_use = antenna;
1626	
1627	mutex_unlock(&common->mutex);
1628	
1629	return 0;
1630
1631fail_set_antenna:
1632	rsi_dbg(ERR_ZONE, "%s: Failed.\n", __func__);
1633	mutex_unlock(&common->mutex);
1634	return -EINVAL;
1635}
1636
1637/**
1638 * rsi_mac80211_get_antenna() - This function is used to configure 
1639 * 				tx and rx antennas.
1640 *
1641 * @hw: Pointer to the ieee80211_hw structure.
1642 * @radio_idx: Radio index
1643 * @tx_ant: Bitmap for tx antenna
1644 * @rx_ant: Bitmap for rx antenna
1645 * 
1646 * Return: 0 on success, negative error codes on failure.
1647 */
1648static int rsi_mac80211_get_antenna(struct ieee80211_hw *hw,
1649				    int radio_idx,
1650				    u32 *tx_ant, u32 *rx_ant)
1651{
1652	struct rsi_hw *adapter = hw->priv;
1653	struct rsi_common *common = adapter->priv;
1654
1655	mutex_lock(&common->mutex);
1656
1657	*tx_ant = (common->ant_in_use == ANTENNA_SEL_UFL) ? 1 : 0;
1658	*rx_ant = 0;
1659
1660	mutex_unlock(&common->mutex);
1661	
1662	return 0;	
1663}
1664
1665static int rsi_map_region_code(enum nl80211_dfs_regions region_code)
1666{
1667	switch (region_code) {
1668	case NL80211_DFS_FCC:
1669		return RSI_REGION_FCC;
1670	case NL80211_DFS_ETSI:
1671		return RSI_REGION_ETSI;
1672	case NL80211_DFS_JP:
1673		return RSI_REGION_TELEC;
1674	case NL80211_DFS_UNSET:
1675		return RSI_REGION_WORLD;
1676	}
1677	return RSI_REGION_WORLD;
1678}
1679
1680static void rsi_reg_notify(struct wiphy *wiphy,
1681			   struct regulatory_request *request)
1682{
1683	struct ieee80211_supported_band *sband;
1684	struct ieee80211_channel *ch;
1685	struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
1686	struct rsi_hw * adapter = hw->priv; 
1687	struct rsi_common *common = adapter->priv;
1688	int i;
1689	
1690	mutex_lock(&common->mutex);
1691
1692	rsi_dbg(INFO_ZONE, "country = %s dfs_region = %d\n",
1693		request->alpha2, request->dfs_region);
1694
1695	if (common->num_supp_bands > 1) {
1696		sband = wiphy->bands[NL80211_BAND_5GHZ];
1697
1698		for (i = 0; i < sband->n_channels; i++) {
1699			ch = &sband->channels[i];
1700			if (ch->flags & IEEE80211_CHAN_DISABLED)
1701				continue;
1702
1703			if (ch->flags & IEEE80211_CHAN_RADAR)
1704				ch->flags |= IEEE80211_CHAN_NO_IR;
1705		}
1706	}
1707	adapter->dfs_region = rsi_map_region_code(request->dfs_region);
1708	rsi_dbg(INFO_ZONE, "RSI region code = %d\n", adapter->dfs_region);
1709	
1710	adapter->country[0] = request->alpha2[0];
1711	adapter->country[1] = request->alpha2[1];
1712
1713	mutex_unlock(&common->mutex);
1714}
1715
1716static void rsi_mac80211_rfkill_poll(struct ieee80211_hw *hw)
1717{
1718	struct rsi_hw *adapter = hw->priv;
1719	struct rsi_common *common = adapter->priv;
1720
1721	mutex_lock(&common->mutex);
1722	if (common->fsm_state != FSM_MAC_INIT_DONE)
1723		wiphy_rfkill_set_hw_state(hw->wiphy, true);
1724	else
1725		wiphy_rfkill_set_hw_state(hw->wiphy, false);
1726	mutex_unlock(&common->mutex);
1727}
1728
1729static void rsi_resume_conn_channel(struct rsi_common *common)
1730{
1731	struct rsi_hw *adapter = common->priv;
1732	struct ieee80211_vif *vif;
1733	int cnt;
1734
1735	for (cnt = 0; cnt < RSI_MAX_VIFS; cnt++) {
1736		vif = adapter->vifs[cnt];
1737		if (!vif)
1738			continue;
1739
1740		if ((vif->type == NL80211_IFTYPE_AP) ||
1741		    (vif->type == NL80211_IFTYPE_P2P_GO)) {
1742			rsi_switch_channel(adapter, vif);
1743			break;
1744		}
1745		if (((vif->type == NL80211_IFTYPE_STATION) ||
1746		     (vif->type == NL80211_IFTYPE_P2P_CLIENT)) &&
1747		    vif->cfg.assoc) {
1748			rsi_switch_channel(adapter, vif);
1749			break;
1750		}
1751	}
1752}
1753
1754void rsi_roc_timeout(struct timer_list *t)
1755{
1756	struct rsi_common *common = timer_container_of(common, t, roc_timer);
1757
1758	rsi_dbg(INFO_ZONE, "Remain on channel expired\n");
1759
1760	mutex_lock(&common->mutex);
1761	ieee80211_remain_on_channel_expired(common->priv->hw);
1762
1763	if (timer_pending(&common->roc_timer))
1764		timer_delete(&common->roc_timer);
1765
1766	rsi_resume_conn_channel(common);
1767	mutex_unlock(&common->mutex);
1768}
1769
1770static int rsi_mac80211_roc(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1771			    struct ieee80211_channel *chan, int duration,
1772			    enum ieee80211_roc_type type)
1773{
1774	struct rsi_hw *adapter = hw->priv;
1775	struct rsi_common *common = adapter->priv;
1776	int status = 0;
1777
1778	rsi_dbg(INFO_ZONE, "***** Remain on channel *****\n");
1779
1780	mutex_lock(&common->mutex);
1781	rsi_dbg(INFO_ZONE, "%s: channel: %d duration: %dms\n",
1782		__func__, chan->hw_value, duration);
1783
1784	if (timer_pending(&common->roc_timer)) {
1785		rsi_dbg(INFO_ZONE, "Stop on-going ROC\n");
1786		timer_delete(&common->roc_timer);
1787	}
1788	common->roc_timer.expires = msecs_to_jiffies(duration) + jiffies;
1789	add_timer(&common->roc_timer);
1790
1791	/* Configure band */
1792	if (rsi_band_check(common, chan)) {
1793		rsi_dbg(ERR_ZONE, "Failed to set band\n");
1794		status = -EINVAL;
1795		goto out;
1796	}
1797
1798	/* Configure channel */
1799	if (rsi_set_channel(common, chan)) {
1800		rsi_dbg(ERR_ZONE, "Failed to set the channel\n");
1801		status = -EINVAL;
1802		goto out;
1803	}
1804
1805	common->roc_vif = vif;
1806	ieee80211_ready_on_channel(hw);
1807	rsi_dbg(INFO_ZONE, "%s: Ready on channel :%d\n",
1808		__func__, chan->hw_value);
1809
1810out:
1811	mutex_unlock(&common->mutex);
1812
1813	return status;
1814}
1815
1816static int rsi_mac80211_cancel_roc(struct ieee80211_hw *hw,
1817				   struct ieee80211_vif *vif)
1818{
1819	struct rsi_hw *adapter = hw->priv;
1820	struct rsi_common *common = adapter->priv;
1821
1822	rsi_dbg(INFO_ZONE, "Cancel remain on channel\n");
1823
1824	mutex_lock(&common->mutex);
1825	if (!timer_pending(&common->roc_timer)) {
1826		mutex_unlock(&common->mutex);
1827		return 0;
1828	}
1829
1830	timer_delete(&common->roc_timer);
1831
1832	rsi_resume_conn_channel(common);
1833	mutex_unlock(&common->mutex);
1834
1835	return 0;
1836}
1837
1838#ifdef CONFIG_PM
1839static const struct wiphy_wowlan_support rsi_wowlan_support = {
1840	.flags = WIPHY_WOWLAN_ANY |
1841		 WIPHY_WOWLAN_MAGIC_PKT |
1842		 WIPHY_WOWLAN_DISCONNECT |
1843		 WIPHY_WOWLAN_GTK_REKEY_FAILURE  |
1844		 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
1845		 WIPHY_WOWLAN_EAP_IDENTITY_REQ   |
1846		 WIPHY_WOWLAN_4WAY_HANDSHAKE,
1847};
1848
1849static u16 rsi_wow_map_triggers(struct rsi_common *common,
1850				struct cfg80211_wowlan *wowlan)
1851{
1852	u16 wow_triggers = 0;
1853
1854	rsi_dbg(INFO_ZONE, "Mapping wowlan triggers\n");
1855
1856	if (wowlan->any)
1857		wow_triggers |= RSI_WOW_ANY;
1858	if (wowlan->magic_pkt)
1859		wow_triggers |= RSI_WOW_MAGIC_PKT;
1860	if (wowlan->disconnect)
1861		wow_triggers |= RSI_WOW_DISCONNECT;
1862	if (wowlan->gtk_rekey_failure || wowlan->eap_identity_req ||
1863	    wowlan->four_way_handshake)
1864		wow_triggers |= RSI_WOW_GTK_REKEY;
1865
1866	return wow_triggers;
1867}
1868
1869int rsi_config_wowlan(struct rsi_hw *adapter, struct cfg80211_wowlan *wowlan)
1870{
1871	struct rsi_common *common = adapter->priv;
1872	struct ieee80211_vif *vif = adapter->vifs[0];
1873	u16 triggers = 0;
1874	u16 rx_filter_word = 0;
1875
1876	rsi_dbg(INFO_ZONE, "Config WoWLAN to device\n");
1877
1878	if (!vif)
1879		return -EINVAL;
1880
1881	if (WARN_ON(!wowlan)) {
1882		rsi_dbg(ERR_ZONE, "WoW triggers not enabled\n");
1883		return -EINVAL;
1884	}
1885
1886	common->wow_flags |= RSI_WOW_ENABLED;
1887	triggers = rsi_wow_map_triggers(common, wowlan);
1888	if (!triggers) {
1889		rsi_dbg(ERR_ZONE, "%s:No valid WoW triggers\n", __func__);
1890		return -EINVAL;
1891	}
1892	if (!vif->cfg.assoc) {
1893		rsi_dbg(ERR_ZONE,
1894			"Cannot configure WoWLAN (Station not connected)\n");
1895		common->wow_flags |= RSI_WOW_NO_CONNECTION;
1896		return 0;
1897	}
1898	rsi_dbg(INFO_ZONE, "TRIGGERS %x\n", triggers);
1899
1900	if (common->coex_mode > 1)
1901		rsi_disable_ps(adapter, adapter->vifs[0]);
1902
1903	rsi_send_wowlan_request(common, triggers, 1);
1904
1905	/**
1906	 * Increase the beacon_miss threshold & keep-alive timers in
1907	 * vap_update frame
1908	 */
1909	rsi_send_vap_dynamic_update(common);
1910
1911	rx_filter_word = (ALLOW_DATA_ASSOC_PEER | DISALLOW_BEACONS);
1912	rsi_send_rx_filter_frame(common, rx_filter_word);
1913
1914	return 0;
1915}
1916EXPORT_SYMBOL(rsi_config_wowlan);
1917
1918static int rsi_mac80211_suspend(struct ieee80211_hw *hw,
1919				struct cfg80211_wowlan *wowlan)
1920{
1921	struct rsi_hw *adapter = hw->priv;
1922	struct rsi_common *common = adapter->priv;
1923
1924	rsi_dbg(INFO_ZONE, "%s: mac80211 suspend\n", __func__);
1925	mutex_lock(&common->mutex);
1926	if (rsi_config_wowlan(adapter, wowlan)) {
1927		rsi_dbg(ERR_ZONE, "Failed to configure WoWLAN\n");
1928		mutex_unlock(&common->mutex);
1929		return 1;
1930	}
1931	mutex_unlock(&common->mutex);
1932
1933	return 0;
1934}
1935
1936static int rsi_mac80211_resume(struct ieee80211_hw *hw)
1937{
1938	u16 rx_filter_word = 0;
1939	struct rsi_hw *adapter = hw->priv;
1940	struct rsi_common *common = adapter->priv;
1941
1942	common->wow_flags = 0;
1943
1944	rsi_dbg(INFO_ZONE, "%s: mac80211 resume\n", __func__);
1945
1946	if (common->hibernate_resume) {
1947		common->mac_ops_resumed = true;
1948		/* Device need a complete restart of all MAC operations.
1949		 * returning 1 will serve this purpose.
1950		 */
1951		return 1;
1952	}
1953
1954	mutex_lock(&common->mutex);
1955	rsi_send_wowlan_request(common, 0, 0);
1956
1957	rx_filter_word = (ALLOW_DATA_ASSOC_PEER | ALLOW_CTRL_ASSOC_PEER |
1958			  ALLOW_MGMT_ASSOC_PEER);
1959	rsi_send_rx_filter_frame(common, rx_filter_word);
1960	mutex_unlock(&common->mutex);
1961
1962	return 0;
1963}
1964
1965#endif
1966
1967static const struct ieee80211_ops mac80211_ops = {
1968	.add_chanctx = ieee80211_emulate_add_chanctx,
1969	.remove_chanctx = ieee80211_emulate_remove_chanctx,
1970	.change_chanctx = ieee80211_emulate_change_chanctx,
1971	.switch_vif_chanctx = ieee80211_emulate_switch_vif_chanctx,
1972	.tx = rsi_mac80211_tx,
1973	.wake_tx_queue = ieee80211_handle_wake_tx_queue,
1974	.start = rsi_mac80211_start,
1975	.stop = rsi_mac80211_stop,
1976	.add_interface = rsi_mac80211_add_interface,
1977	.remove_interface = rsi_mac80211_remove_interface,
1978	.config = rsi_mac80211_config,
1979	.bss_info_changed = rsi_mac80211_bss_info_changed,
1980	.conf_tx = rsi_mac80211_conf_tx,
1981	.configure_filter = rsi_mac80211_conf_filter,
1982	.set_key = rsi_mac80211_set_key,
1983	.set_rts_threshold = rsi_mac80211_set_rts_threshold,
1984	.set_bitrate_mask = rsi_mac80211_set_rate_mask,
1985	.ampdu_action = rsi_mac80211_ampdu_action,
1986	.sta_add = rsi_mac80211_sta_add,
1987	.sta_remove = rsi_mac80211_sta_remove,
1988	.set_antenna = rsi_mac80211_set_antenna,
1989	.get_antenna = rsi_mac80211_get_antenna,
1990	.rfkill_poll = rsi_mac80211_rfkill_poll,
1991	.remain_on_channel = rsi_mac80211_roc,
1992	.cancel_remain_on_channel = rsi_mac80211_cancel_roc,
1993#ifdef CONFIG_PM
1994	.suspend = rsi_mac80211_suspend,
1995	.resume  = rsi_mac80211_resume,
1996#endif
1997	.hw_scan = rsi_mac80211_hw_scan_start,
1998	.cancel_hw_scan = rsi_mac80211_cancel_hw_scan,
1999};
2000
2001/**
2002 * rsi_mac80211_attach() - This function is used to initialize Mac80211 stack.
2003 * @common: Pointer to the driver private structure.
2004 *
2005 * Return: 0 on success, negative error codes on failure.
2006 */
2007int rsi_mac80211_attach(struct rsi_common *common)
2008{
2009	int status = 0;
2010	struct ieee80211_hw *hw = NULL;
2011	struct wiphy *wiphy = NULL;
2012	struct rsi_hw *adapter = common->priv;
2013	u8 addr_mask[ETH_ALEN] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x3};
2014
2015	rsi_dbg(INIT_ZONE, "%s: Performing mac80211 attach\n", __func__);
2016
2017	hw = ieee80211_alloc_hw(sizeof(struct rsi_hw), &mac80211_ops);
2018	if (!hw) {
2019		rsi_dbg(ERR_ZONE, "%s: ieee80211 hw alloc failed\n", __func__);
2020		return -ENOMEM;
2021	}
2022
2023	wiphy = hw->wiphy;
2024
2025	SET_IEEE80211_DEV(hw, adapter->device);
2026
2027	hw->priv = adapter;
2028	adapter->hw = hw;
2029
2030	ieee80211_hw_set(hw, SIGNAL_DBM);
2031	ieee80211_hw_set(hw, HAS_RATE_CONTROL);
2032	ieee80211_hw_set(hw, AMPDU_AGGREGATION);
2033	ieee80211_hw_set(hw, SUPPORTS_PS);
2034	ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
2035
2036	hw->queues = MAX_HW_QUEUES;
2037	hw->extra_tx_headroom = RSI_NEEDED_HEADROOM;
2038	hw->vif_data_size = sizeof(struct vif_priv);
2039
2040	hw->max_rates = 1;
2041	hw->max_rate_tries = MAX_RETRIES;
2042	hw->uapsd_queues = RSI_IEEE80211_UAPSD_QUEUES;
2043	hw->uapsd_max_sp_len = IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL;
2044
2045	hw->max_tx_aggregation_subframes = RSI_MAX_TX_AGGR_FRMS;
2046	hw->max_rx_aggregation_subframes = RSI_MAX_RX_AGGR_FRMS;
2047	hw->rate_control_algorithm = "AARF";
2048
2049	SET_IEEE80211_PERM_ADDR(hw, common->mac_addr);
2050	ether_addr_copy(hw->wiphy->addr_mask, addr_mask);
2051
2052	wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
2053				 BIT(NL80211_IFTYPE_AP) |
2054				 BIT(NL80211_IFTYPE_P2P_DEVICE) |
2055				 BIT(NL80211_IFTYPE_P2P_CLIENT) |
2056				 BIT(NL80211_IFTYPE_P2P_GO);
2057
2058	wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
2059	wiphy->retry_short = RETRY_SHORT;
2060	wiphy->retry_long  = RETRY_LONG;
2061	wiphy->frag_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
2062	wiphy->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
2063	wiphy->flags = 0;
2064
2065	wiphy->available_antennas_rx = 1;
2066	wiphy->available_antennas_tx = 1;
2067
2068	status = rsi_register_rates_channels(adapter, NL80211_BAND_2GHZ);
2069	if (status)
2070		return status;
2071	wiphy->bands[NL80211_BAND_2GHZ] =
2072		&adapter->sbands[NL80211_BAND_2GHZ];
2073	if (common->num_supp_bands > 1) {
2074		status = rsi_register_rates_channels(adapter,
2075						     NL80211_BAND_5GHZ);
2076		if (status)
2077			return status;
2078		wiphy->bands[NL80211_BAND_5GHZ] =
2079			&adapter->sbands[NL80211_BAND_5GHZ];
2080	}
2081
2082	/* AP Parameters */
2083	wiphy->max_ap_assoc_sta = rsi_max_ap_stas[common->oper_mode - 1];
2084	common->max_stations = wiphy->max_ap_assoc_sta;
2085	rsi_dbg(ERR_ZONE, "Max Stations Allowed = %d\n", common->max_stations);
2086	hw->sta_data_size = sizeof(struct rsi_sta);
2087
2088	wiphy->max_scan_ssids = RSI_MAX_SCAN_SSIDS;
2089	wiphy->max_scan_ie_len = RSI_MAX_SCAN_IE_LEN;
2090	wiphy->flags = WIPHY_FLAG_REPORTS_OBSS;
2091	wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
2092	wiphy->features |= NL80211_FEATURE_INACTIVITY_TIMER;
2093	wiphy->reg_notifier = rsi_reg_notify;
2094
2095#ifdef CONFIG_PM
2096	wiphy->wowlan = &rsi_wowlan_support;
2097#endif
2098
2099	wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
2100
2101	/* Wi-Fi direct parameters */
2102	wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
2103	wiphy->flags |= WIPHY_FLAG_OFFCHAN_TX;
2104	wiphy->max_remain_on_channel_duration = 10000;
2105	hw->max_listen_interval = 10;
2106	wiphy->iface_combinations = rsi_iface_combinations;
2107	wiphy->n_iface_combinations = ARRAY_SIZE(rsi_iface_combinations);
2108
2109	if (common->coex_mode > 1)
2110		wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
2111
2112	status = ieee80211_register_hw(hw);
2113	if (status)
2114		return status;
2115
2116	return rsi_init_dbgfs(adapter);
2117}