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 *
 414 * Return: None.
 415 */
 416static void rsi_mac80211_stop(struct ieee80211_hw *hw)
 417{
 418	struct rsi_hw *adapter = hw->priv;
 419	struct rsi_common *common = adapter->priv;
 420
 421	rsi_dbg(ERR_ZONE, "===> Interface DOWN <===\n");
 422	mutex_lock(&common->mutex);
 423	common->iface_down = true;
 424	wiphy_rfkill_stop_polling(hw->wiphy);
 425
 426	/* Block all rx frames */
 427	rsi_send_rx_filter_frame(common, 0xffff);
 428
 429	mutex_unlock(&common->mutex);
 430}
 431
 432static int rsi_map_intf_mode(enum nl80211_iftype vif_type)
 433{
 434	switch (vif_type) {
 435	case NL80211_IFTYPE_STATION:
 436		return RSI_OPMODE_STA;
 437	case NL80211_IFTYPE_AP:
 438		return RSI_OPMODE_AP;
 439	case NL80211_IFTYPE_P2P_DEVICE:
 440		return RSI_OPMODE_P2P_CLIENT;
 441	case NL80211_IFTYPE_P2P_CLIENT:
 442		return RSI_OPMODE_P2P_CLIENT;
 443	case NL80211_IFTYPE_P2P_GO:
 444		return RSI_OPMODE_P2P_GO;
 445	default:
 446		return RSI_OPMODE_UNSUPPORTED;
 447	}
 448}
 449
 450/**
 451 * rsi_mac80211_add_interface() - This function is called when a netdevice
 452 *				  attached to the hardware is enabled.
 453 * @hw: Pointer to the ieee80211_hw structure.
 454 * @vif: Pointer to the ieee80211_vif structure.
 455 *
 456 * Return: ret: 0 on success, negative error code on failure.
 457 */
 458static int rsi_mac80211_add_interface(struct ieee80211_hw *hw,
 459				      struct ieee80211_vif *vif)
 460{
 461	struct rsi_hw *adapter = hw->priv;
 462	struct rsi_common *common = adapter->priv;
 463	struct vif_priv *vif_info = (struct vif_priv *)vif->drv_priv;
 464	enum opmode intf_mode;
 465	enum vap_status vap_status;
 466	int vap_idx = -1, i;
 467
 468	vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
 469	mutex_lock(&common->mutex);
 470
 471	intf_mode = rsi_map_intf_mode(vif->type);
 472	if (intf_mode == RSI_OPMODE_UNSUPPORTED) {
 473		rsi_dbg(ERR_ZONE,
 474			"%s: Interface type %d not supported\n", __func__,
 475			vif->type);
 476		mutex_unlock(&common->mutex);
 477		return -EOPNOTSUPP;
 478	}
 479	if ((vif->type == NL80211_IFTYPE_P2P_DEVICE) ||
 480	    (vif->type == NL80211_IFTYPE_P2P_CLIENT) ||
 481	    (vif->type == NL80211_IFTYPE_P2P_GO))
 482		common->p2p_enabled = true;
 483
 484	/* Get free vap index */
 485	for (i = 0; i < RSI_MAX_VIFS; i++) {
 486		if (!adapter->vifs[i] ||
 487		    !memcmp(vif->addr, adapter->vifs[i]->addr, ETH_ALEN)) {
 488			vap_idx = i;
 489			break;
 490		}
 491	}
 492	if (vap_idx < 0) {
 493		rsi_dbg(ERR_ZONE, "Reject: Max VAPs reached\n");
 494		mutex_unlock(&common->mutex);
 495		return -EOPNOTSUPP;
 496	}
 497	vif_info->vap_id = vap_idx;
 498	adapter->vifs[vap_idx] = vif;
 499	adapter->sc_nvifs++;
 500	vap_status = VAP_ADD;
 501
 502	if (rsi_set_vap_capabilities(common, intf_mode, vif->addr,
 503				     vif_info->vap_id, vap_status)) {
 504		rsi_dbg(ERR_ZONE, "Failed to set VAP capabilities\n");
 505		mutex_unlock(&common->mutex);
 506		return -EINVAL;
 507	}
 508
 509	if ((vif->type == NL80211_IFTYPE_AP) ||
 510	    (vif->type == NL80211_IFTYPE_P2P_GO)) {
 511		rsi_send_rx_filter_frame(common, DISALLOW_BEACONS);
 
 512		for (i = 0; i < common->max_stations; i++)
 513			common->stations[i].sta = NULL;
 514	}
 515
 516	mutex_unlock(&common->mutex);
 517
 518	return 0;
 519}
 520
 521/**
 522 * rsi_mac80211_remove_interface() - This function notifies driver that an
 523 *				     interface is going down.
 524 * @hw: Pointer to the ieee80211_hw structure.
 525 * @vif: Pointer to the ieee80211_vif structure.
 526 *
 527 * Return: None.
 528 */
 529static void rsi_mac80211_remove_interface(struct ieee80211_hw *hw,
 530					  struct ieee80211_vif *vif)
 531{
 532	struct rsi_hw *adapter = hw->priv;
 533	struct rsi_common *common = adapter->priv;
 534	enum opmode opmode;
 535	int i;
 536
 537	rsi_dbg(INFO_ZONE, "Remove Interface Called\n");
 538
 539	mutex_lock(&common->mutex);
 540
 541	if (adapter->sc_nvifs <= 0) {
 542		mutex_unlock(&common->mutex);
 543		return;
 544	}
 545
 546	opmode = rsi_map_intf_mode(vif->type);
 547	if (opmode == RSI_OPMODE_UNSUPPORTED) {
 548		rsi_dbg(ERR_ZONE, "Opmode error : %d\n", opmode);
 549		mutex_unlock(&common->mutex);
 550		return;
 551	}
 552	for (i = 0; i < RSI_MAX_VIFS; i++) {
 553		if (!adapter->vifs[i])
 554			continue;
 555		if (vif == adapter->vifs[i]) {
 556			rsi_set_vap_capabilities(common, opmode, vif->addr,
 557						 i, VAP_DELETE);
 558			adapter->sc_nvifs--;
 559			adapter->vifs[i] = NULL;
 560		}
 561	}
 562	mutex_unlock(&common->mutex);
 563}
 564
 565/**
 566 * rsi_channel_change() - This function is a performs the checks
 567 *			  required for changing a channel and sets
 568 *			  the channel accordingly.
 569 * @hw: Pointer to the ieee80211_hw structure.
 570 *
 571 * Return: 0 on success, negative error code on failure.
 572 */
 573static int rsi_channel_change(struct ieee80211_hw *hw)
 574{
 575	struct rsi_hw *adapter = hw->priv;
 576	struct rsi_common *common = adapter->priv;
 577	int status = -EOPNOTSUPP;
 578	struct ieee80211_channel *curchan = hw->conf.chandef.chan;
 579	u16 channel = curchan->hw_value;
 580	struct ieee80211_vif *vif;
 
 581	bool assoc = false;
 582	int i;
 583
 584	rsi_dbg(INFO_ZONE,
 585		"%s: Set channel: %d MHz type: %d channel_no %d\n",
 586		__func__, curchan->center_freq,
 587		curchan->flags, channel);
 588
 589	for (i = 0; i < RSI_MAX_VIFS; i++) {
 590		vif = adapter->vifs[i];
 591		if (!vif)
 592			continue;
 593		if (vif->type == NL80211_IFTYPE_STATION) {
 594			if (vif->cfg.assoc) {
 
 595				assoc = true;
 596				break;
 597			}
 598		}
 599	}
 600	if (assoc) {
 601		if (!common->hw_data_qs_blocked &&
 602		    (rsi_get_connected_channel(vif) != channel)) {
 603			rsi_dbg(INFO_ZONE, "blk data q %d\n", channel);
 604			if (!rsi_send_block_unblock_frame(common, true))
 605				common->hw_data_qs_blocked = true;
 606		}
 607	}
 608
 609	status = rsi_band_check(common, curchan);
 610	if (!status)
 611		status = rsi_set_channel(adapter->priv, curchan);
 612
 613	if (assoc) {
 614		if (common->hw_data_qs_blocked &&
 615		    (rsi_get_connected_channel(vif) == channel)) {
 616			rsi_dbg(INFO_ZONE, "unblk data q %d\n", channel);
 617			if (!rsi_send_block_unblock_frame(common, false))
 618				common->hw_data_qs_blocked = false;
 619		}
 620	}
 621
 622	return status;
 623}
 624
 625/**
 626 * rsi_config_power() - This function configures tx power to device
 627 * @hw: Pointer to the ieee80211_hw structure.
 628 *
 629 * Return: 0 on success, negative error code on failure.
 630 */
 631static int rsi_config_power(struct ieee80211_hw *hw)
 632{
 633	struct rsi_hw *adapter = hw->priv;
 634	struct rsi_common *common = adapter->priv;
 635	struct ieee80211_conf *conf = &hw->conf;
 636
 637	if (adapter->sc_nvifs <= 0) {
 638		rsi_dbg(ERR_ZONE, "%s: No virtual interface found\n", __func__);
 639		return -EINVAL;
 640	}
 641
 642	rsi_dbg(INFO_ZONE,
 643		"%s: Set tx power: %d dBM\n", __func__, conf->power_level);
 644
 645	if (conf->power_level == common->tx_power)
 646		return 0;
 647
 648	common->tx_power = conf->power_level;
 649
 650	return rsi_send_radio_params_update(common);
 651}
 652
 653/**
 654 * rsi_mac80211_config() - This function is a handler for configuration
 655 *			   requests. The stack calls this function to
 656 *			   change hardware configuration, e.g., channel.
 657 * @hw: Pointer to the ieee80211_hw structure.
 658 * @changed: Changed flags set.
 659 *
 660 * Return: 0 on success, negative error code on failure.
 661 */
 662static int rsi_mac80211_config(struct ieee80211_hw *hw,
 663			       u32 changed)
 664{
 665	struct rsi_hw *adapter = hw->priv;
 666	struct rsi_common *common = adapter->priv;
 667	struct ieee80211_conf *conf = &hw->conf;
 668	int status = -EOPNOTSUPP;
 669
 670	mutex_lock(&common->mutex);
 671
 672	if (changed & IEEE80211_CONF_CHANGE_CHANNEL)
 673		status = rsi_channel_change(hw);
 674
 675	/* tx power */
 676	if (changed & IEEE80211_CONF_CHANGE_POWER) {
 677		rsi_dbg(INFO_ZONE, "%s: Configuring Power\n", __func__);
 678		status = rsi_config_power(hw);
 679	}
 680
 681	/* Power save parameters */
 682	if ((changed & IEEE80211_CONF_CHANGE_PS) &&
 683	    !common->mac_ops_resumed) {
 684		struct ieee80211_vif *vif, *sta_vif = NULL;
 685		unsigned long flags;
 686		int i, set_ps = 1;
 687
 688		for (i = 0; i < RSI_MAX_VIFS; i++) {
 689			vif = adapter->vifs[i];
 690			if (!vif)
 691				continue;
 692			/* Don't go to power save if AP vap exists */
 693			if ((vif->type == NL80211_IFTYPE_AP) ||
 694			    (vif->type == NL80211_IFTYPE_P2P_GO)) {
 695				set_ps = 0;
 696				break;
 697			}
 698			if ((vif->type == NL80211_IFTYPE_STATION ||
 699			     vif->type == NL80211_IFTYPE_P2P_CLIENT) &&
 700			    (!sta_vif || vif->cfg.assoc))
 701				sta_vif = vif;
 702		}
 703		if (set_ps && sta_vif) {
 704			spin_lock_irqsave(&adapter->ps_lock, flags);
 705			if (conf->flags & IEEE80211_CONF_PS)
 706				rsi_enable_ps(adapter, sta_vif);
 707			else
 708				rsi_disable_ps(adapter, sta_vif);
 709			spin_unlock_irqrestore(&adapter->ps_lock, flags);
 710		}
 711	}
 712
 713	/* RTS threshold */
 714	if (changed & WIPHY_PARAM_RTS_THRESHOLD) {
 715		rsi_dbg(INFO_ZONE, "RTS threshold\n");
 716		if ((common->rts_threshold) <= IEEE80211_MAX_RTS_THRESHOLD) {
 717			rsi_dbg(INFO_ZONE,
 718				"%s: Sending vap updates....\n", __func__);
 719			status = rsi_send_vap_dynamic_update(common);
 720		}
 721	}
 722	mutex_unlock(&common->mutex);
 723
 724	return status;
 725}
 726
 727/**
 728 * rsi_get_connected_channel() - This function is used to get the current
 729 *				 connected channel number.
 730 * @vif: Pointer to the ieee80211_vif structure.
 731 *
 732 * Return: Current connected AP's channel number is returned.
 733 */
 734u16 rsi_get_connected_channel(struct ieee80211_vif *vif)
 735{
 736	struct ieee80211_bss_conf *bss;
 737	struct ieee80211_channel *channel;
 738
 739	if (!vif)
 740		return 0;
 741
 742	bss = &vif->bss_conf;
 743	channel = bss->chandef.chan;
 744
 745	if (!channel)
 746		return 0;
 747
 748	return channel->hw_value;
 749}
 750
 751static void rsi_switch_channel(struct rsi_hw *adapter,
 752			       struct ieee80211_vif *vif)
 753{
 754	struct rsi_common *common = adapter->priv;
 755	struct ieee80211_channel *channel;
 756
 757	if (common->iface_down)
 758		return;
 759	if (!vif)
 760		return;
 761
 762	channel = vif->bss_conf.chandef.chan;
 763
 764	if (!channel)
 765		return;
 766
 767	rsi_band_check(common, channel);
 768	rsi_set_channel(common, channel);
 769	rsi_dbg(INFO_ZONE, "Switched to channel - %d\n", channel->hw_value);
 770}
 771
 772/**
 773 * rsi_mac80211_bss_info_changed() - This function is a handler for config
 774 *				     requests related to BSS parameters that
 775 *				     may vary during BSS's lifespan.
 776 * @hw: Pointer to the ieee80211_hw structure.
 777 * @vif: Pointer to the ieee80211_vif structure.
 778 * @bss_conf: Pointer to the ieee80211_bss_conf structure.
 779 * @changed: Changed flags set.
 780 *
 781 * Return: None.
 782 */
 783static void rsi_mac80211_bss_info_changed(struct ieee80211_hw *hw,
 784					  struct ieee80211_vif *vif,
 785					  struct ieee80211_bss_conf *bss_conf,
 786					  u64 changed)
 787{
 788	struct rsi_hw *adapter = hw->priv;
 789	struct rsi_common *common = adapter->priv;
 790	struct ieee80211_bss_conf *bss = &vif->bss_conf;
 791	struct ieee80211_conf *conf = &hw->conf;
 792	u16 rx_filter_word = 0;
 793
 794	mutex_lock(&common->mutex);
 795	if (changed & BSS_CHANGED_ASSOC) {
 796		rsi_dbg(INFO_ZONE, "%s: Changed Association status: %d\n",
 797			__func__, vif->cfg.assoc);
 798		if (vif->cfg.assoc) {
 799			/* Send the RX filter frame */
 800			rx_filter_word = (ALLOW_DATA_ASSOC_PEER |
 801					  ALLOW_CTRL_ASSOC_PEER |
 802					  ALLOW_MGMT_ASSOC_PEER);
 803			rsi_send_rx_filter_frame(common, rx_filter_word);
 804		}
 805		rsi_inform_bss_status(common,
 806				      RSI_OPMODE_STA,
 807				      vif->cfg.assoc,
 808				      bss_conf->bssid,
 809				      bss_conf->qos,
 810				      vif->cfg.aid,
 811				      NULL, 0,
 812				      bss_conf->assoc_capability, vif);
 813		adapter->ps_info.dtim_interval_duration = bss->dtim_period;
 814		adapter->ps_info.listen_interval = conf->listen_interval;
 815
 816		/* If U-APSD is updated, send ps parameters to firmware */
 817		if (vif->cfg.assoc) {
 818			if (common->uapsd_bitmap) {
 819				rsi_dbg(INFO_ZONE, "Configuring UAPSD\n");
 820				rsi_conf_uapsd(adapter, vif);
 821			}
 822		} else {
 823			common->uapsd_bitmap = 0;
 824		}
 825	}
 826
 827	if (changed & BSS_CHANGED_CQM) {
 828		common->cqm_info.last_cqm_event_rssi = 0;
 829		common->cqm_info.rssi_thold = bss_conf->cqm_rssi_thold;
 830		common->cqm_info.rssi_hyst = bss_conf->cqm_rssi_hyst;
 831		rsi_dbg(INFO_ZONE, "RSSI threshold & hysteresis are: %d %d\n",
 832			common->cqm_info.rssi_thold,
 833			common->cqm_info.rssi_hyst);
 834	}
 835
 836	if (changed & BSS_CHANGED_BEACON_INT) {
 837		rsi_dbg(INFO_ZONE, "%s: Changed Beacon interval: %d\n",
 838			__func__, bss_conf->beacon_int);
 839		if (common->beacon_interval != bss->beacon_int) {
 840			common->beacon_interval = bss->beacon_int;
 841			if (vif->type == NL80211_IFTYPE_AP) {
 842				struct vif_priv *vif_info = (struct vif_priv *)vif->drv_priv;
 843
 844				rsi_set_vap_capabilities(common, RSI_OPMODE_AP,
 845							 vif->addr, vif_info->vap_id,
 846							 VAP_UPDATE);
 847			}
 848		}
 849		adapter->ps_info.listen_interval =
 850			bss->beacon_int * adapter->ps_info.num_bcns_per_lis_int;
 851	}
 852
 853	if ((changed & BSS_CHANGED_BEACON_ENABLED) &&
 854	    ((vif->type == NL80211_IFTYPE_AP) ||
 855	     (vif->type == NL80211_IFTYPE_P2P_GO))) {
 856		if (bss->enable_beacon) {
 857			rsi_dbg(INFO_ZONE, "===> BEACON ENABLED <===\n");
 858			common->beacon_enabled = 1;
 859		} else {
 860			rsi_dbg(INFO_ZONE, "===> BEACON DISABLED <===\n");
 861			common->beacon_enabled = 0;
 862		}
 863	}
 864
 865	mutex_unlock(&common->mutex);
 866}
 867
 868/**
 869 * rsi_mac80211_conf_filter() - This function configure the device's RX filter.
 870 * @hw: Pointer to the ieee80211_hw structure.
 871 * @changed_flags: Changed flags set.
 872 * @total_flags: Total initial flags set.
 873 * @multicast: Multicast.
 874 *
 875 * Return: None.
 876 */
 877static void rsi_mac80211_conf_filter(struct ieee80211_hw *hw,
 878				     u32 changed_flags,
 879				     u32 *total_flags,
 880				     u64 multicast)
 881{
 882	/* Not doing much here as of now */
 883	*total_flags &= RSI_SUPP_FILTERS;
 884}
 885
 886/**
 887 * rsi_mac80211_conf_tx() - This function configures TX queue parameters
 888 *			    (EDCF (aifs, cw_min, cw_max), bursting)
 889 *			    for a hardware TX queue.
 890 * @hw: Pointer to the ieee80211_hw structure
 891 * @vif: Pointer to the ieee80211_vif structure.
 892 * @link_id: the link ID if MLO is used, otherwise 0
 893 * @queue: Queue number.
 894 * @params: Pointer to ieee80211_tx_queue_params structure.
 895 *
 896 * Return: 0 on success, negative error code on failure.
 897 */
 898static int rsi_mac80211_conf_tx(struct ieee80211_hw *hw,
 899				struct ieee80211_vif *vif,
 900				unsigned int link_id, u16 queue,
 901				const struct ieee80211_tx_queue_params *params)
 902{
 903	struct rsi_hw *adapter = hw->priv;
 904	struct rsi_common *common = adapter->priv;
 905	u8 idx = 0;
 906
 907	if (queue >= IEEE80211_NUM_ACS)
 908		return 0;
 909
 910	rsi_dbg(INFO_ZONE,
 911		"%s: Conf queue %d, aifs: %d, cwmin: %d cwmax: %d, txop: %d\n",
 912		__func__, queue, params->aifs,
 913		params->cw_min, params->cw_max, params->txop);
 914
 915	mutex_lock(&common->mutex);
 916	/* Map into the way the f/w expects */
 917	switch (queue) {
 918	case IEEE80211_AC_VO:
 919		idx = VO_Q;
 920		break;
 921	case IEEE80211_AC_VI:
 922		idx = VI_Q;
 923		break;
 924	case IEEE80211_AC_BE:
 925		idx = BE_Q;
 926		break;
 927	case IEEE80211_AC_BK:
 928		idx = BK_Q;
 929		break;
 930	default:
 931		idx = BE_Q;
 932		break;
 933	}
 934
 935	memcpy(&common->edca_params[idx],
 936	       params,
 937	       sizeof(struct ieee80211_tx_queue_params));
 938
 939	if (params->uapsd)
 940		common->uapsd_bitmap |= idx;
 941	else
 942		common->uapsd_bitmap &= (~idx);
 943
 944	mutex_unlock(&common->mutex);
 945
 946	return 0;
 947}
 948
 949/**
 950 * rsi_hal_key_config() - This function loads the keys into the firmware.
 951 * @hw: Pointer to the ieee80211_hw structure.
 952 * @vif: Pointer to the ieee80211_vif structure.
 953 * @key: Pointer to the ieee80211_key_conf structure.
 954 * @sta: Pointer to the ieee80211_sta structure.
 955 *
 956 * Return: status: 0 on success, negative error codes on failure.
 957 */
 958static int rsi_hal_key_config(struct ieee80211_hw *hw,
 959			      struct ieee80211_vif *vif,
 960			      struct ieee80211_key_conf *key,
 961			      struct ieee80211_sta *sta)
 962{
 963	struct rsi_hw *adapter = hw->priv;
 964	struct rsi_sta *rsta = NULL;
 965	int status;
 966	u8 key_type;
 967	s16 sta_id = 0;
 968
 969	if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
 970		key_type = RSI_PAIRWISE_KEY;
 971	else
 972		key_type = RSI_GROUP_KEY;
 973
 974	rsi_dbg(ERR_ZONE, "%s: Cipher 0x%x key_type: %d key_len: %d\n",
 975		__func__, key->cipher, key_type, key->keylen);
 976
 977	if ((vif->type == NL80211_IFTYPE_AP) ||
 978	    (vif->type == NL80211_IFTYPE_P2P_GO)) {
 979		if (sta) {
 980			rsta = rsi_find_sta(adapter->priv, sta->addr);
 981			if (rsta)
 982				sta_id = rsta->sta_id;
 983		}
 984		adapter->priv->key = key;
 985	} else {
 986		if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
 987		    (key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
 988			status = rsi_hal_load_key(adapter->priv,
 989						  key->key,
 990						  key->keylen,
 991						  RSI_PAIRWISE_KEY,
 992						  key->keyidx,
 993						  key->cipher,
 994						  sta_id,
 995						  vif);
 996			if (status)
 997				return status;
 998		}
 999	}
1000
1001	status = rsi_hal_load_key(adapter->priv,
1002				  key->key,
1003				  key->keylen,
1004				  key_type,
1005				  key->keyidx,
1006				  key->cipher,
1007				  sta_id,
1008				  vif);
1009	if (status)
1010		return status;
1011
1012	if (vif->type == NL80211_IFTYPE_STATION &&
1013	    (key->cipher == WLAN_CIPHER_SUITE_WEP104 ||
1014	     key->cipher == WLAN_CIPHER_SUITE_WEP40)) {
1015		if (!rsi_send_block_unblock_frame(adapter->priv, false))
1016			adapter->priv->hw_data_qs_blocked = false;
1017	}
1018
1019	return 0;
1020}
1021
1022/**
1023 * rsi_mac80211_set_key() - This function sets type of key to be loaded.
1024 * @hw: Pointer to the ieee80211_hw structure.
1025 * @cmd: enum set_key_cmd.
1026 * @vif: Pointer to the ieee80211_vif structure.
1027 * @sta: Pointer to the ieee80211_sta structure.
1028 * @key: Pointer to the ieee80211_key_conf structure.
1029 *
1030 * Return: status: 0 on success, negative error code on failure.
1031 */
1032static int rsi_mac80211_set_key(struct ieee80211_hw *hw,
1033				enum set_key_cmd cmd,
1034				struct ieee80211_vif *vif,
1035				struct ieee80211_sta *sta,
1036				struct ieee80211_key_conf *key)
1037{
1038	struct rsi_hw *adapter = hw->priv;
1039	struct rsi_common *common = adapter->priv;
1040	struct security_info *secinfo = &common->secinfo;
1041	int status;
1042
1043	mutex_lock(&common->mutex);
1044	switch (cmd) {
1045	case SET_KEY:
 
1046		status = rsi_hal_key_config(hw, vif, key, sta);
1047		if (status) {
1048			mutex_unlock(&common->mutex);
1049			return status;
1050		}
1051
1052		if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
1053			secinfo->ptk_cipher = key->cipher;
1054		else
1055			secinfo->gtk_cipher = key->cipher;
1056
1057		key->hw_key_idx = key->keyidx;
1058		key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
1059
1060		rsi_dbg(ERR_ZONE, "%s: RSI set_key\n", __func__);
1061		break;
1062
1063	case DISABLE_KEY:
 
 
1064		rsi_dbg(ERR_ZONE, "%s: RSI del key\n", __func__);
1065		memset(key, 0, sizeof(struct ieee80211_key_conf));
1066		status = rsi_hal_key_config(hw, vif, key, sta);
1067		break;
1068
1069	default:
1070		status = -EOPNOTSUPP;
1071		break;
1072	}
1073
1074	mutex_unlock(&common->mutex);
1075	return status;
1076}
1077
1078/**
1079 * rsi_mac80211_ampdu_action() - This function selects the AMPDU action for
1080 *				 the corresponding mlme_action flag and
1081 *				 informs the f/w regarding this.
1082 * @hw: Pointer to the ieee80211_hw structure.
1083 * @vif: Pointer to the ieee80211_vif structure.
1084 * @params: Pointer to A-MPDU action parameters
1085 *
1086 * Return: status: 0 on success, negative error code on failure.
1087 */
1088static int rsi_mac80211_ampdu_action(struct ieee80211_hw *hw,
1089				     struct ieee80211_vif *vif,
1090				     struct ieee80211_ampdu_params *params)
1091{
1092	int status = -EOPNOTSUPP;
1093	struct rsi_hw *adapter = hw->priv;
1094	struct rsi_common *common = adapter->priv;
1095	struct rsi_sta *rsta = NULL;
1096	u16 seq_no = 0, seq_start = 0;
1097	u8 ii = 0;
1098	struct ieee80211_sta *sta = params->sta;
1099	u8 sta_id = 0;
1100	enum ieee80211_ampdu_mlme_action action = params->action;
1101	u16 tid = params->tid;
1102	u16 *ssn = &params->ssn;
1103	u8 buf_size = params->buf_size;
1104
1105	for (ii = 0; ii < RSI_MAX_VIFS; ii++) {
1106		if (vif == adapter->vifs[ii])
1107			break;
1108	}
1109
1110	if (ii >= RSI_MAX_VIFS)
1111		return status;
1112
1113	mutex_lock(&common->mutex);
1114
1115	if (ssn != NULL)
1116		seq_no = *ssn;
1117
1118	if ((vif->type == NL80211_IFTYPE_AP) ||
1119	    (vif->type == NL80211_IFTYPE_P2P_GO)) {
1120		rsta = rsi_find_sta(common, sta->addr);
1121		if (!rsta) {
1122			rsi_dbg(ERR_ZONE, "No station mapped\n");
1123			status = 0;
1124			goto unlock;
1125		}
1126		sta_id = rsta->sta_id;
1127	}
1128
1129	rsi_dbg(INFO_ZONE,
1130		"%s: AMPDU action tid=%d ssn=0x%x, buf_size=%d sta_id=%d\n",
1131		__func__, tid, seq_no, buf_size, sta_id);
1132
1133	switch (action) {
1134	case IEEE80211_AMPDU_RX_START:
1135		status = rsi_send_aggregation_params_frame(common,
1136							   tid,
1137							   seq_no,
1138							   buf_size,
1139							   STA_RX_ADDBA_DONE,
1140							   sta_id);
1141		break;
1142
1143	case IEEE80211_AMPDU_RX_STOP:
1144		status = rsi_send_aggregation_params_frame(common,
1145							   tid,
1146							   0,
1147							   buf_size,
1148							   STA_RX_DELBA,
1149							   sta_id);
1150		break;
1151
1152	case IEEE80211_AMPDU_TX_START:
1153		if ((vif->type == NL80211_IFTYPE_STATION) ||
1154		    (vif->type == NL80211_IFTYPE_P2P_CLIENT))
1155			common->vif_info[ii].seq_start = seq_no;
1156		else if ((vif->type == NL80211_IFTYPE_AP) ||
1157			 (vif->type == NL80211_IFTYPE_P2P_GO))
1158			rsta->seq_start[tid] = seq_no;
1159		status = IEEE80211_AMPDU_TX_START_IMMEDIATE;
 
1160		break;
1161
1162	case IEEE80211_AMPDU_TX_STOP_CONT:
1163	case IEEE80211_AMPDU_TX_STOP_FLUSH:
1164	case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
1165		status = rsi_send_aggregation_params_frame(common,
1166							   tid,
1167							   seq_no,
1168							   buf_size,
1169							   STA_TX_DELBA,
1170							   sta_id);
1171		if (!status)
1172			ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid);
1173		break;
1174
1175	case IEEE80211_AMPDU_TX_OPERATIONAL:
1176		if ((vif->type == NL80211_IFTYPE_STATION) ||
1177		    (vif->type == NL80211_IFTYPE_P2P_CLIENT))
1178			seq_start = common->vif_info[ii].seq_start;
1179		else if ((vif->type == NL80211_IFTYPE_AP) ||
1180			 (vif->type == NL80211_IFTYPE_P2P_GO))
1181			seq_start = rsta->seq_start[tid];
1182		status = rsi_send_aggregation_params_frame(common,
1183							   tid,
1184							   seq_start,
1185							   buf_size,
1186							   STA_TX_ADDBA_DONE,
1187							   sta_id);
1188		break;
1189
1190	default:
1191		rsi_dbg(ERR_ZONE, "%s: Unknown AMPDU action\n", __func__);
1192		break;
1193	}
1194
1195unlock:
1196	mutex_unlock(&common->mutex);
1197	return status;
1198}
1199
1200/**
1201 * rsi_mac80211_set_rts_threshold() - This function sets rts threshold value.
1202 * @hw: Pointer to the ieee80211_hw structure.
1203 * @value: Rts threshold value.
1204 *
1205 * Return: 0 on success.
1206 */
1207static int rsi_mac80211_set_rts_threshold(struct ieee80211_hw *hw,
1208					  u32 value)
1209{
1210	struct rsi_hw *adapter = hw->priv;
1211	struct rsi_common *common = adapter->priv;
1212
1213	mutex_lock(&common->mutex);
1214	common->rts_threshold = value;
1215	mutex_unlock(&common->mutex);
1216
1217	return 0;
1218}
1219
1220/**
1221 * rsi_mac80211_set_rate_mask() - This function sets bitrate_mask to be used.
1222 * @hw: Pointer to the ieee80211_hw structure
1223 * @vif: Pointer to the ieee80211_vif structure.
1224 * @mask: Pointer to the cfg80211_bitrate_mask structure.
1225 *
1226 * Return: 0 on success.
1227 */
1228static int rsi_mac80211_set_rate_mask(struct ieee80211_hw *hw,
1229				      struct ieee80211_vif *vif,
1230				      const struct cfg80211_bitrate_mask *mask)
1231{
1232	const unsigned int mcs_offset = ARRAY_SIZE(rsi_rates);
1233	struct rsi_hw *adapter = hw->priv;
1234	struct rsi_common *common = adapter->priv;
1235	int i;
1236
1237	mutex_lock(&common->mutex);
 
1238
1239	for (i = 0; i < ARRAY_SIZE(common->rate_config); i++) {
1240		struct rsi_rate_config *cfg = &common->rate_config[i];
1241		u32 bm;
1242
1243		bm = mask->control[i].legacy | (mask->control[i].ht_mcs[0] << mcs_offset);
1244		if (hweight32(bm) == 1) { /* single rate */
1245			int rate_index = ffs(bm) - 1;
1246
1247			if (rate_index < mcs_offset)
1248				cfg->fixed_hw_rate = rsi_rates[rate_index].hw_value;
1249			else
1250				cfg->fixed_hw_rate = rsi_mcsrates[rate_index - mcs_offset];
1251			cfg->fixed_enabled = true;
1252		} else {
1253			cfg->configured_mask = bm;
1254			cfg->fixed_enabled = false;
1255		}
1256	}
1257
1258	mutex_unlock(&common->mutex);
1259
1260	return 0;
1261}
1262
1263/**
1264 * rsi_perform_cqm() - This function performs cqm.
1265 * @common: Pointer to the driver private structure.
1266 * @bssid: pointer to the bssid.
1267 * @rssi: RSSI value.
1268 * @vif: Pointer to the ieee80211_vif structure.
1269 */
1270static void rsi_perform_cqm(struct rsi_common *common,
1271			    u8 *bssid,
1272			    s8 rssi,
1273			    struct ieee80211_vif *vif)
1274{
1275	s8 last_event = common->cqm_info.last_cqm_event_rssi;
1276	int thold = common->cqm_info.rssi_thold;
1277	u32 hyst = common->cqm_info.rssi_hyst;
1278	enum nl80211_cqm_rssi_threshold_event event;
1279
1280	if (rssi < thold && (last_event == 0 || rssi < (last_event - hyst)))
1281		event = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
1282	else if (rssi > thold &&
1283		 (last_event == 0 || rssi > (last_event + hyst)))
1284		event = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
1285	else
1286		return;
1287
1288	common->cqm_info.last_cqm_event_rssi = rssi;
1289	rsi_dbg(INFO_ZONE, "CQM: Notifying event: %d\n", event);
1290	ieee80211_cqm_rssi_notify(vif, event, rssi, GFP_KERNEL);
1291
1292	return;
1293}
1294
1295/**
1296 * rsi_fill_rx_status() - This function fills rx status in
1297 *			  ieee80211_rx_status structure.
1298 * @hw: Pointer to the ieee80211_hw structure.
1299 * @skb: Pointer to the socket buffer structure.
1300 * @common: Pointer to the driver private structure.
1301 * @rxs: Pointer to the ieee80211_rx_status structure.
1302 *
1303 * Return: None.
1304 */
1305static void rsi_fill_rx_status(struct ieee80211_hw *hw,
1306			       struct sk_buff *skb,
1307			       struct rsi_common *common,
1308			       struct ieee80211_rx_status *rxs)
1309{
1310	struct rsi_hw *adapter = common->priv;
1311	struct ieee80211_vif *vif;
1312	struct ieee80211_bss_conf *bss = NULL;
1313	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1314	struct skb_info *rx_params = (struct skb_info *)info->driver_data;
1315	struct ieee80211_hdr *hdr;
1316	char rssi = rx_params->rssi;
1317	u8 hdrlen = 0;
1318	u8 channel = rx_params->channel;
1319	s32 freq;
1320	int i;
1321
1322	hdr = ((struct ieee80211_hdr *)(skb->data));
1323	hdrlen = ieee80211_hdrlen(hdr->frame_control);
1324
1325	memset(info, 0, sizeof(struct ieee80211_tx_info));
1326
1327	rxs->signal = -(rssi);
1328
1329	rxs->band = common->band;
1330
1331	freq = ieee80211_channel_to_frequency(channel, rxs->band);
1332
1333	if (freq)
1334		rxs->freq = freq;
1335
1336	if (ieee80211_has_protected(hdr->frame_control)) {
1337		if (rsi_is_cipher_wep(common)) {
1338			memmove(skb->data + 4, skb->data, hdrlen);
1339			skb_pull(skb, 4);
1340		} else {
1341			memmove(skb->data + 8, skb->data, hdrlen);
1342			skb_pull(skb, 8);
1343			rxs->flag |= RX_FLAG_MMIC_STRIPPED;
1344		}
1345		rxs->flag |= RX_FLAG_DECRYPTED;
1346		rxs->flag |= RX_FLAG_IV_STRIPPED;
1347	}
1348
1349	for (i = 0; i < RSI_MAX_VIFS; i++) {
1350		vif = adapter->vifs[i];
1351		if (!vif)
1352			continue;
1353		if (vif->type == NL80211_IFTYPE_STATION) {
1354			bss = &vif->bss_conf;
1355			break;
1356		}
1357	}
1358	if (!bss)
1359		return;
1360	/* CQM only for connected AP beacons, the RSSI is a weighted avg */
1361	if (vif->cfg.assoc && !(memcmp(bss->bssid, hdr->addr2, ETH_ALEN))) {
1362		if (ieee80211_is_beacon(hdr->frame_control))
1363			rsi_perform_cqm(common, hdr->addr2, rxs->signal, vif);
1364	}
1365
1366	return;
1367}
1368
1369/**
1370 * rsi_indicate_pkt_to_os() - This function sends received packet to mac80211.
1371 * @common: Pointer to the driver private structure.
1372 * @skb: Pointer to the socket buffer structure.
1373 *
1374 * Return: None.
1375 */
1376void rsi_indicate_pkt_to_os(struct rsi_common *common,
1377			    struct sk_buff *skb)
1378{
1379	struct rsi_hw *adapter = common->priv;
1380	struct ieee80211_hw *hw = adapter->hw;
1381	struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
1382
1383	if ((common->iface_down) || (!adapter->sc_nvifs)) {
1384		dev_kfree_skb(skb);
1385		return;
1386	}
1387
1388	/* filling in the ieee80211_rx_status flags */
1389	rsi_fill_rx_status(hw, skb, common, rx_status);
1390
1391	ieee80211_rx_irqsafe(hw, skb);
1392}
1393
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1394/**
1395 * rsi_mac80211_sta_add() - This function notifies driver about a peer getting
1396 *			    connected.
1397 * @hw: pointer to the ieee80211_hw structure.
1398 * @vif: Pointer to the ieee80211_vif structure.
1399 * @sta: Pointer to the ieee80211_sta structure.
1400 *
1401 * Return: 0 on success, negative error codes on failure.
1402 */
1403static int rsi_mac80211_sta_add(struct ieee80211_hw *hw,
1404				struct ieee80211_vif *vif,
1405				struct ieee80211_sta *sta)
1406{
1407	struct rsi_hw *adapter = hw->priv;
1408	struct rsi_common *common = adapter->priv;
1409	bool sta_exist = false;
1410	struct rsi_sta *rsta;
1411	int status = 0;
1412
1413	rsi_dbg(INFO_ZONE, "Station Add: %pM\n", sta->addr);
1414
1415	mutex_lock(&common->mutex);
1416
1417	if ((vif->type == NL80211_IFTYPE_AP) ||
1418	    (vif->type == NL80211_IFTYPE_P2P_GO)) {
1419		u8 cnt;
1420		int sta_idx = -1;
1421		int free_index = -1;
1422
1423		/* Check if max stations reached */
1424		if (common->num_stations >= common->max_stations) {
1425			rsi_dbg(ERR_ZONE, "Reject: Max Stations exists\n");
1426			status = -EOPNOTSUPP;
1427			goto unlock;
1428		}
1429		for (cnt = 0; cnt < common->max_stations; cnt++) {
1430			rsta = &common->stations[cnt];
1431
1432			if (!rsta->sta) {
1433				if (free_index < 0)
1434					free_index = cnt;
1435				continue;
1436			}
1437			if (!memcmp(rsta->sta->addr, sta->addr, ETH_ALEN)) {
1438				rsi_dbg(INFO_ZONE, "Station exists\n");
1439				sta_idx = cnt;
1440				sta_exist = true;
1441				break;
1442			}
1443		}
1444		if (!sta_exist) {
1445			if (free_index >= 0)
1446				sta_idx = free_index;
1447		}
1448		if (sta_idx < 0) {
1449			rsi_dbg(ERR_ZONE,
1450				"%s: Some problem reaching here...\n",
1451				__func__);
1452			status = -EINVAL;
1453			goto unlock;
1454		}
1455		rsta = &common->stations[sta_idx];
1456		rsta->sta = sta;
1457		rsta->sta_id = sta_idx;
1458		for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1459			rsta->start_tx_aggr[cnt] = false;
1460		for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1461			rsta->seq_start[cnt] = 0;
1462		if (!sta_exist) {
1463			rsi_dbg(INFO_ZONE, "New Station\n");
1464
1465			/* Send peer notify to device */
1466			rsi_dbg(INFO_ZONE, "Indicate bss status to device\n");
1467			rsi_inform_bss_status(common, RSI_OPMODE_AP, 1,
1468					      sta->addr, sta->wme, sta->aid,
1469					      sta, sta_idx, 0, vif);
1470
1471			if (common->key) {
1472				struct ieee80211_key_conf *key = common->key;
1473
1474				if ((key->cipher == WLAN_CIPHER_SUITE_WEP104) ||
1475				    (key->cipher == WLAN_CIPHER_SUITE_WEP40))
1476					rsi_hal_load_key(adapter->priv,
1477							 key->key,
1478							 key->keylen,
1479							 RSI_PAIRWISE_KEY,
1480							 key->keyidx,
1481							 key->cipher,
1482							 sta_idx,
1483							 vif);
1484			}
1485
1486			common->num_stations++;
1487		}
1488	}
1489
1490	if ((vif->type == NL80211_IFTYPE_STATION) ||
1491	    (vif->type == NL80211_IFTYPE_P2P_CLIENT)) {
1492		common->bitrate_mask[common->band] = sta->deflink.supp_rates[common->band];
1493		common->vif_info[0].is_ht = sta->deflink.ht_cap.ht_supported;
1494		if (sta->deflink.ht_cap.ht_supported) {
1495			common->bitrate_mask[NL80211_BAND_2GHZ] =
1496					sta->deflink.supp_rates[NL80211_BAND_2GHZ];
1497			if ((sta->deflink.ht_cap.cap & IEEE80211_HT_CAP_SGI_20) ||
1498			    (sta->deflink.ht_cap.cap & IEEE80211_HT_CAP_SGI_40))
1499				common->vif_info[0].sgi = true;
1500			ieee80211_start_tx_ba_session(sta, 0, 0);
1501		}
1502	}
1503
1504unlock:
1505	mutex_unlock(&common->mutex);
1506
1507	return status;
1508}
1509
1510/**
1511 * rsi_mac80211_sta_remove() - This function notifies driver about a peer
1512 *			       getting disconnected.
1513 * @hw: Pointer to the ieee80211_hw structure.
1514 * @vif: Pointer to the ieee80211_vif structure.
1515 * @sta: Pointer to the ieee80211_sta structure.
1516 *
1517 * Return: 0 on success, negative error codes on failure.
1518 */
1519static int rsi_mac80211_sta_remove(struct ieee80211_hw *hw,
1520				   struct ieee80211_vif *vif,
1521				   struct ieee80211_sta *sta)
1522{
1523	struct rsi_hw *adapter = hw->priv;
1524	struct rsi_common *common = adapter->priv;
1525	struct ieee80211_bss_conf *bss = &vif->bss_conf;
1526	struct rsi_sta *rsta;
1527
1528	rsi_dbg(INFO_ZONE, "Station Remove: %pM\n", sta->addr);
1529
1530	mutex_lock(&common->mutex);
1531
1532	if ((vif->type == NL80211_IFTYPE_AP) ||
1533	    (vif->type == NL80211_IFTYPE_P2P_GO)) {
1534		u8 sta_idx, cnt;
1535
1536		/* Send peer notify to device */
1537		rsi_dbg(INFO_ZONE, "Indicate bss status to device\n");
1538		for (sta_idx = 0; sta_idx < common->max_stations; sta_idx++) {
1539			rsta = &common->stations[sta_idx];
1540
1541			if (!rsta->sta)
1542				continue;
1543			if (!memcmp(rsta->sta->addr, sta->addr, ETH_ALEN)) {
1544				rsi_inform_bss_status(common, RSI_OPMODE_AP, 0,
1545						      sta->addr, sta->wme,
1546						      sta->aid, sta, sta_idx,
1547						      0, vif);
1548				rsta->sta = NULL;
1549				rsta->sta_id = -1;
1550				for (cnt = 0; cnt < IEEE80211_NUM_TIDS; cnt++)
1551					rsta->start_tx_aggr[cnt] = false;
1552				if (common->num_stations > 0)
1553					common->num_stations--;
1554				break;
1555			}
1556		}
1557		if (sta_idx >= common->max_stations)
1558			rsi_dbg(ERR_ZONE, "%s: No station found\n", __func__);
1559	}
1560
1561	if ((vif->type == NL80211_IFTYPE_STATION) ||
1562	    (vif->type == NL80211_IFTYPE_P2P_CLIENT)) {
1563		/* Resetting all the fields to default values */
1564		memcpy((u8 *)bss->bssid, (u8 *)sta->addr, ETH_ALEN);
1565		bss->qos = sta->wme;
1566		common->bitrate_mask[NL80211_BAND_2GHZ] = 0;
1567		common->bitrate_mask[NL80211_BAND_5GHZ] = 0;
 
1568		common->vif_info[0].is_ht = false;
1569		common->vif_info[0].sgi = false;
1570		common->vif_info[0].seq_start = 0;
1571		common->secinfo.ptk_cipher = 0;
1572		common->secinfo.gtk_cipher = 0;
1573		if (!common->iface_down)
1574			rsi_send_rx_filter_frame(common, 0);
1575	}
1576	mutex_unlock(&common->mutex);
1577	
1578	return 0;
1579}
1580
1581/**
1582 * rsi_mac80211_set_antenna() - This function is used to configure
1583 *				tx and rx antennas.
1584 * @hw: Pointer to the ieee80211_hw structure.
1585 * @tx_ant: Bitmap for tx antenna
1586 * @rx_ant: Bitmap for rx antenna
1587 *
1588 * Return: 0 on success, Negative error code on failure.
1589 */
1590static int rsi_mac80211_set_antenna(struct ieee80211_hw *hw,
1591				    u32 tx_ant, u32 rx_ant)
1592{
1593	struct rsi_hw *adapter = hw->priv;
1594	struct rsi_common *common = adapter->priv;
1595	u8 antenna = 0;
1596
1597	if (tx_ant > 1 || rx_ant > 1) {
1598		rsi_dbg(ERR_ZONE,
1599			"Invalid antenna selection (tx: %d, rx:%d)\n",
1600			tx_ant, rx_ant);
1601		rsi_dbg(ERR_ZONE,
1602			"Use 0 for int_ant, 1 for ext_ant\n");
1603		return -EINVAL; 
1604	}
1605
1606	rsi_dbg(INFO_ZONE, "%s: Antenna map Tx %x Rx %d\n",
1607			__func__, tx_ant, rx_ant);
1608
1609	mutex_lock(&common->mutex);
1610
1611	antenna = tx_ant ? ANTENNA_SEL_UFL : ANTENNA_SEL_INT;
1612	if (common->ant_in_use != antenna)
1613		if (rsi_set_antenna(common, antenna))
1614			goto fail_set_antenna;
1615
1616	rsi_dbg(INFO_ZONE, "(%s) Antenna path configured successfully\n",
1617		tx_ant ? "UFL" : "INT");
1618
1619	common->ant_in_use = antenna;
1620	
1621	mutex_unlock(&common->mutex);
1622	
1623	return 0;
1624
1625fail_set_antenna:
1626	rsi_dbg(ERR_ZONE, "%s: Failed.\n", __func__);
1627	mutex_unlock(&common->mutex);
1628	return -EINVAL;
1629}
1630
1631/**
1632 * rsi_mac80211_get_antenna() - This function is used to configure 
1633 * 				tx and rx antennas.
1634 *
1635 * @hw: Pointer to the ieee80211_hw structure.
1636 * @tx_ant: Bitmap for tx antenna
1637 * @rx_ant: Bitmap for rx antenna
1638 * 
1639 * Return: 0 on success, negative error codes on failure.
1640 */
1641static int rsi_mac80211_get_antenna(struct ieee80211_hw *hw,
1642				    u32 *tx_ant, u32 *rx_ant)
1643{
1644	struct rsi_hw *adapter = hw->priv;
1645	struct rsi_common *common = adapter->priv;
1646
1647	mutex_lock(&common->mutex);
1648
1649	*tx_ant = (common->ant_in_use == ANTENNA_SEL_UFL) ? 1 : 0;
1650	*rx_ant = 0;
1651
1652	mutex_unlock(&common->mutex);
1653	
1654	return 0;	
1655}
1656
1657static int rsi_map_region_code(enum nl80211_dfs_regions region_code)
1658{
1659	switch (region_code) {
1660	case NL80211_DFS_FCC:
1661		return RSI_REGION_FCC;
1662	case NL80211_DFS_ETSI:
1663		return RSI_REGION_ETSI;
1664	case NL80211_DFS_JP:
1665		return RSI_REGION_TELEC;
1666	case NL80211_DFS_UNSET:
1667		return RSI_REGION_WORLD;
1668	}
1669	return RSI_REGION_WORLD;
1670}
1671
1672static void rsi_reg_notify(struct wiphy *wiphy,
1673			   struct regulatory_request *request)
1674{
1675	struct ieee80211_supported_band *sband;
1676	struct ieee80211_channel *ch;
1677	struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
1678	struct rsi_hw * adapter = hw->priv; 
1679	struct rsi_common *common = adapter->priv;
1680	int i;
1681	
1682	mutex_lock(&common->mutex);
1683
1684	rsi_dbg(INFO_ZONE, "country = %s dfs_region = %d\n",
1685		request->alpha2, request->dfs_region);
1686
1687	if (common->num_supp_bands > 1) {
1688		sband = wiphy->bands[NL80211_BAND_5GHZ];
1689
1690		for (i = 0; i < sband->n_channels; i++) {
1691			ch = &sband->channels[i];
1692			if (ch->flags & IEEE80211_CHAN_DISABLED)
1693				continue;
1694
1695			if (ch->flags & IEEE80211_CHAN_RADAR)
1696				ch->flags |= IEEE80211_CHAN_NO_IR;
1697		}
1698	}
1699	adapter->dfs_region = rsi_map_region_code(request->dfs_region);
1700	rsi_dbg(INFO_ZONE, "RSI region code = %d\n", adapter->dfs_region);
1701	
1702	adapter->country[0] = request->alpha2[0];
1703	adapter->country[1] = request->alpha2[1];
1704
1705	mutex_unlock(&common->mutex);
1706}
1707
1708static void rsi_mac80211_rfkill_poll(struct ieee80211_hw *hw)
1709{
1710	struct rsi_hw *adapter = hw->priv;
1711	struct rsi_common *common = adapter->priv;
1712
1713	mutex_lock(&common->mutex);
1714	if (common->fsm_state != FSM_MAC_INIT_DONE)
1715		wiphy_rfkill_set_hw_state(hw->wiphy, true);
1716	else
1717		wiphy_rfkill_set_hw_state(hw->wiphy, false);
1718	mutex_unlock(&common->mutex);
1719}
1720
1721static void rsi_resume_conn_channel(struct rsi_common *common)
1722{
1723	struct rsi_hw *adapter = common->priv;
1724	struct ieee80211_vif *vif;
1725	int cnt;
1726
1727	for (cnt = 0; cnt < RSI_MAX_VIFS; cnt++) {
1728		vif = adapter->vifs[cnt];
1729		if (!vif)
1730			continue;
1731
1732		if ((vif->type == NL80211_IFTYPE_AP) ||
1733		    (vif->type == NL80211_IFTYPE_P2P_GO)) {
1734			rsi_switch_channel(adapter, vif);
1735			break;
1736		}
1737		if (((vif->type == NL80211_IFTYPE_STATION) ||
1738		     (vif->type == NL80211_IFTYPE_P2P_CLIENT)) &&
1739		    vif->cfg.assoc) {
1740			rsi_switch_channel(adapter, vif);
1741			break;
1742		}
1743	}
1744}
1745
1746void rsi_roc_timeout(struct timer_list *t)
1747{
1748	struct rsi_common *common = from_timer(common, t, roc_timer);
1749
1750	rsi_dbg(INFO_ZONE, "Remain on channel expired\n");
1751
1752	mutex_lock(&common->mutex);
1753	ieee80211_remain_on_channel_expired(common->priv->hw);
1754
1755	if (timer_pending(&common->roc_timer))
1756		del_timer(&common->roc_timer);
1757
1758	rsi_resume_conn_channel(common);
1759	mutex_unlock(&common->mutex);
1760}
1761
1762static int rsi_mac80211_roc(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1763			    struct ieee80211_channel *chan, int duration,
1764			    enum ieee80211_roc_type type)
1765{
1766	struct rsi_hw *adapter = hw->priv;
1767	struct rsi_common *common = adapter->priv;
1768	int status = 0;
1769
1770	rsi_dbg(INFO_ZONE, "***** Remain on channel *****\n");
1771
1772	mutex_lock(&common->mutex);
1773	rsi_dbg(INFO_ZONE, "%s: channel: %d duration: %dms\n",
1774		__func__, chan->hw_value, duration);
1775
1776	if (timer_pending(&common->roc_timer)) {
1777		rsi_dbg(INFO_ZONE, "Stop on-going ROC\n");
1778		del_timer(&common->roc_timer);
1779	}
1780	common->roc_timer.expires = msecs_to_jiffies(duration) + jiffies;
1781	add_timer(&common->roc_timer);
1782
1783	/* Configure band */
1784	if (rsi_band_check(common, chan)) {
1785		rsi_dbg(ERR_ZONE, "Failed to set band\n");
1786		status = -EINVAL;
1787		goto out;
1788	}
1789
1790	/* Configure channel */
1791	if (rsi_set_channel(common, chan)) {
1792		rsi_dbg(ERR_ZONE, "Failed to set the channel\n");
1793		status = -EINVAL;
1794		goto out;
1795	}
1796
1797	common->roc_vif = vif;
1798	ieee80211_ready_on_channel(hw);
1799	rsi_dbg(INFO_ZONE, "%s: Ready on channel :%d\n",
1800		__func__, chan->hw_value);
1801
1802out:
1803	mutex_unlock(&common->mutex);
1804
1805	return status;
1806}
1807
1808static int rsi_mac80211_cancel_roc(struct ieee80211_hw *hw,
1809				   struct ieee80211_vif *vif)
1810{
1811	struct rsi_hw *adapter = hw->priv;
1812	struct rsi_common *common = adapter->priv;
1813
1814	rsi_dbg(INFO_ZONE, "Cancel remain on channel\n");
1815
1816	mutex_lock(&common->mutex);
1817	if (!timer_pending(&common->roc_timer)) {
1818		mutex_unlock(&common->mutex);
1819		return 0;
1820	}
1821
1822	del_timer(&common->roc_timer);
1823
1824	rsi_resume_conn_channel(common);
1825	mutex_unlock(&common->mutex);
1826
1827	return 0;
1828}
1829
1830#ifdef CONFIG_PM
1831static const struct wiphy_wowlan_support rsi_wowlan_support = {
1832	.flags = WIPHY_WOWLAN_ANY |
1833		 WIPHY_WOWLAN_MAGIC_PKT |
1834		 WIPHY_WOWLAN_DISCONNECT |
1835		 WIPHY_WOWLAN_GTK_REKEY_FAILURE  |
1836		 WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
1837		 WIPHY_WOWLAN_EAP_IDENTITY_REQ   |
1838		 WIPHY_WOWLAN_4WAY_HANDSHAKE,
1839};
1840
1841static u16 rsi_wow_map_triggers(struct rsi_common *common,
1842				struct cfg80211_wowlan *wowlan)
1843{
1844	u16 wow_triggers = 0;
1845
1846	rsi_dbg(INFO_ZONE, "Mapping wowlan triggers\n");
1847
1848	if (wowlan->any)
1849		wow_triggers |= RSI_WOW_ANY;
1850	if (wowlan->magic_pkt)
1851		wow_triggers |= RSI_WOW_MAGIC_PKT;
1852	if (wowlan->disconnect)
1853		wow_triggers |= RSI_WOW_DISCONNECT;
1854	if (wowlan->gtk_rekey_failure || wowlan->eap_identity_req ||
1855	    wowlan->four_way_handshake)
1856		wow_triggers |= RSI_WOW_GTK_REKEY;
1857
1858	return wow_triggers;
1859}
1860
1861int rsi_config_wowlan(struct rsi_hw *adapter, struct cfg80211_wowlan *wowlan)
1862{
1863	struct rsi_common *common = adapter->priv;
1864	struct ieee80211_vif *vif = adapter->vifs[0];
1865	u16 triggers = 0;
1866	u16 rx_filter_word = 0;
 
1867
1868	rsi_dbg(INFO_ZONE, "Config WoWLAN to device\n");
1869
1870	if (!vif)
1871		return -EINVAL;
1872
 
 
1873	if (WARN_ON(!wowlan)) {
1874		rsi_dbg(ERR_ZONE, "WoW triggers not enabled\n");
1875		return -EINVAL;
1876	}
1877
1878	common->wow_flags |= RSI_WOW_ENABLED;
1879	triggers = rsi_wow_map_triggers(common, wowlan);
1880	if (!triggers) {
1881		rsi_dbg(ERR_ZONE, "%s:No valid WoW triggers\n", __func__);
1882		return -EINVAL;
1883	}
1884	if (!vif->cfg.assoc) {
1885		rsi_dbg(ERR_ZONE,
1886			"Cannot configure WoWLAN (Station not connected)\n");
1887		common->wow_flags |= RSI_WOW_NO_CONNECTION;
1888		return 0;
1889	}
1890	rsi_dbg(INFO_ZONE, "TRIGGERS %x\n", triggers);
1891
1892	if (common->coex_mode > 1)
1893		rsi_disable_ps(adapter, adapter->vifs[0]);
1894
1895	rsi_send_wowlan_request(common, triggers, 1);
1896
1897	/**
1898	 * Increase the beacon_miss threshold & keep-alive timers in
1899	 * vap_update frame
1900	 */
1901	rsi_send_vap_dynamic_update(common);
1902
1903	rx_filter_word = (ALLOW_DATA_ASSOC_PEER | DISALLOW_BEACONS);
1904	rsi_send_rx_filter_frame(common, rx_filter_word);
1905
1906	return 0;
1907}
1908EXPORT_SYMBOL(rsi_config_wowlan);
1909
1910static int rsi_mac80211_suspend(struct ieee80211_hw *hw,
1911				struct cfg80211_wowlan *wowlan)
1912{
1913	struct rsi_hw *adapter = hw->priv;
1914	struct rsi_common *common = adapter->priv;
1915
1916	rsi_dbg(INFO_ZONE, "%s: mac80211 suspend\n", __func__);
1917	mutex_lock(&common->mutex);
1918	if (rsi_config_wowlan(adapter, wowlan)) {
1919		rsi_dbg(ERR_ZONE, "Failed to configure WoWLAN\n");
1920		mutex_unlock(&common->mutex);
1921		return 1;
1922	}
1923	mutex_unlock(&common->mutex);
1924
1925	return 0;
1926}
1927
1928static int rsi_mac80211_resume(struct ieee80211_hw *hw)
1929{
1930	u16 rx_filter_word = 0;
1931	struct rsi_hw *adapter = hw->priv;
1932	struct rsi_common *common = adapter->priv;
1933
1934	common->wow_flags = 0;
1935
1936	rsi_dbg(INFO_ZONE, "%s: mac80211 resume\n", __func__);
1937
1938	if (common->hibernate_resume) {
1939		common->mac_ops_resumed = true;
1940		/* Device need a complete restart of all MAC operations.
1941		 * returning 1 will serve this purpose.
1942		 */
1943		return 1;
1944	}
1945
1946	mutex_lock(&common->mutex);
1947	rsi_send_wowlan_request(common, 0, 0);
1948
1949	rx_filter_word = (ALLOW_DATA_ASSOC_PEER | ALLOW_CTRL_ASSOC_PEER |
1950			  ALLOW_MGMT_ASSOC_PEER);
1951	rsi_send_rx_filter_frame(common, rx_filter_word);
1952	mutex_unlock(&common->mutex);
1953
1954	return 0;
1955}
1956
1957#endif
1958
1959static const struct ieee80211_ops mac80211_ops = {
1960	.tx = rsi_mac80211_tx,
1961	.wake_tx_queue = ieee80211_handle_wake_tx_queue,
1962	.start = rsi_mac80211_start,
1963	.stop = rsi_mac80211_stop,
1964	.add_interface = rsi_mac80211_add_interface,
1965	.remove_interface = rsi_mac80211_remove_interface,
1966	.config = rsi_mac80211_config,
1967	.bss_info_changed = rsi_mac80211_bss_info_changed,
1968	.conf_tx = rsi_mac80211_conf_tx,
1969	.configure_filter = rsi_mac80211_conf_filter,
1970	.set_key = rsi_mac80211_set_key,
1971	.set_rts_threshold = rsi_mac80211_set_rts_threshold,
1972	.set_bitrate_mask = rsi_mac80211_set_rate_mask,
1973	.ampdu_action = rsi_mac80211_ampdu_action,
1974	.sta_add = rsi_mac80211_sta_add,
1975	.sta_remove = rsi_mac80211_sta_remove,
1976	.set_antenna = rsi_mac80211_set_antenna,
1977	.get_antenna = rsi_mac80211_get_antenna,
1978	.rfkill_poll = rsi_mac80211_rfkill_poll,
1979	.remain_on_channel = rsi_mac80211_roc,
1980	.cancel_remain_on_channel = rsi_mac80211_cancel_roc,
1981#ifdef CONFIG_PM
1982	.suspend = rsi_mac80211_suspend,
1983	.resume  = rsi_mac80211_resume,
1984#endif
1985	.hw_scan = rsi_mac80211_hw_scan_start,
1986	.cancel_hw_scan = rsi_mac80211_cancel_hw_scan,
1987};
1988
1989/**
1990 * rsi_mac80211_attach() - This function is used to initialize Mac80211 stack.
1991 * @common: Pointer to the driver private structure.
1992 *
1993 * Return: 0 on success, negative error codes on failure.
1994 */
1995int rsi_mac80211_attach(struct rsi_common *common)
1996{
1997	int status = 0;
1998	struct ieee80211_hw *hw = NULL;
1999	struct wiphy *wiphy = NULL;
2000	struct rsi_hw *adapter = common->priv;
2001	u8 addr_mask[ETH_ALEN] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x3};
2002
2003	rsi_dbg(INIT_ZONE, "%s: Performing mac80211 attach\n", __func__);
2004
2005	hw = ieee80211_alloc_hw(sizeof(struct rsi_hw), &mac80211_ops);
2006	if (!hw) {
2007		rsi_dbg(ERR_ZONE, "%s: ieee80211 hw alloc failed\n", __func__);
2008		return -ENOMEM;
2009	}
2010
2011	wiphy = hw->wiphy;
2012
2013	SET_IEEE80211_DEV(hw, adapter->device);
2014
2015	hw->priv = adapter;
2016	adapter->hw = hw;
2017
2018	ieee80211_hw_set(hw, SIGNAL_DBM);
2019	ieee80211_hw_set(hw, HAS_RATE_CONTROL);
2020	ieee80211_hw_set(hw, AMPDU_AGGREGATION);
2021	ieee80211_hw_set(hw, SUPPORTS_PS);
2022	ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
2023
2024	hw->queues = MAX_HW_QUEUES;
2025	hw->extra_tx_headroom = RSI_NEEDED_HEADROOM;
2026
2027	hw->max_rates = 1;
2028	hw->max_rate_tries = MAX_RETRIES;
2029	hw->uapsd_queues = RSI_IEEE80211_UAPSD_QUEUES;
2030	hw->uapsd_max_sp_len = IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL;
2031
2032	hw->max_tx_aggregation_subframes = RSI_MAX_TX_AGGR_FRMS;
2033	hw->max_rx_aggregation_subframes = RSI_MAX_RX_AGGR_FRMS;
2034	hw->rate_control_algorithm = "AARF";
2035
2036	SET_IEEE80211_PERM_ADDR(hw, common->mac_addr);
2037	ether_addr_copy(hw->wiphy->addr_mask, addr_mask);
2038
2039	wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
2040				 BIT(NL80211_IFTYPE_AP) |
2041				 BIT(NL80211_IFTYPE_P2P_DEVICE) |
2042				 BIT(NL80211_IFTYPE_P2P_CLIENT) |
2043				 BIT(NL80211_IFTYPE_P2P_GO);
2044
2045	wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
2046	wiphy->retry_short = RETRY_SHORT;
2047	wiphy->retry_long  = RETRY_LONG;
2048	wiphy->frag_threshold = IEEE80211_MAX_FRAG_THRESHOLD;
2049	wiphy->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
2050	wiphy->flags = 0;
2051
2052	wiphy->available_antennas_rx = 1;
2053	wiphy->available_antennas_tx = 1;
2054
2055	status = rsi_register_rates_channels(adapter, NL80211_BAND_2GHZ);
2056	if (status)
2057		return status;
2058	wiphy->bands[NL80211_BAND_2GHZ] =
2059		&adapter->sbands[NL80211_BAND_2GHZ];
2060	if (common->num_supp_bands > 1) {
2061		status = rsi_register_rates_channels(adapter,
2062						     NL80211_BAND_5GHZ);
2063		if (status)
2064			return status;
2065		wiphy->bands[NL80211_BAND_5GHZ] =
2066			&adapter->sbands[NL80211_BAND_5GHZ];
2067	}
2068
2069	/* AP Parameters */
2070	wiphy->max_ap_assoc_sta = rsi_max_ap_stas[common->oper_mode - 1];
2071	common->max_stations = wiphy->max_ap_assoc_sta;
2072	rsi_dbg(ERR_ZONE, "Max Stations Allowed = %d\n", common->max_stations);
2073	hw->sta_data_size = sizeof(struct rsi_sta);
2074
2075	wiphy->max_scan_ssids = RSI_MAX_SCAN_SSIDS;
2076	wiphy->max_scan_ie_len = RSI_MAX_SCAN_IE_LEN;
2077	wiphy->flags = WIPHY_FLAG_REPORTS_OBSS;
2078	wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
2079	wiphy->features |= NL80211_FEATURE_INACTIVITY_TIMER;
2080	wiphy->reg_notifier = rsi_reg_notify;
2081
2082#ifdef CONFIG_PM
2083	wiphy->wowlan = &rsi_wowlan_support;
2084#endif
2085
2086	wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
2087
2088	/* Wi-Fi direct parameters */
2089	wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
2090	wiphy->flags |= WIPHY_FLAG_OFFCHAN_TX;
2091	wiphy->max_remain_on_channel_duration = 10000;
2092	hw->max_listen_interval = 10;
2093	wiphy->iface_combinations = rsi_iface_combinations;
2094	wiphy->n_iface_combinations = ARRAY_SIZE(rsi_iface_combinations);
2095
2096	if (common->coex_mode > 1)
2097		wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
2098
2099	status = ieee80211_register_hw(hw);
2100	if (status)
2101		return status;
2102
2103	return rsi_init_dbgfs(adapter);
2104}