1// SPDX-License-Identifier: GPL-2.0-only
   2/******************************************************************************
   3 *
 
 
   4 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
   5 *
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   6 * Contact Information:
   7 *  Intel Linux Wireless <ilw@linux.intel.com>
   8 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
   9 *****************************************************************************/
  10
  11#include <linux/kernel.h>
  12#include <linux/module.h>
  13#include <linux/etherdevice.h>
  14#include <linux/sched.h>
  15#include <linux/slab.h>
  16#include <linux/types.h>
  17#include <linux/lockdep.h>
  18#include <linux/pci.h>
  19#include <linux/dma-mapping.h>
  20#include <linux/delay.h>
  21#include <linux/skbuff.h>
  22#include <net/mac80211.h>
  23
  24#include "common.h"
  25
  26int
  27_il_poll_bit(struct il_priv *il, u32 addr, u32 bits, u32 mask, int timeout)
  28{
  29	const int interval = 10; /* microseconds */
  30	int t = 0;
  31
  32	do {
  33		if ((_il_rd(il, addr) & mask) == (bits & mask))
  34			return t;
  35		udelay(interval);
  36		t += interval;
  37	} while (t < timeout);
  38
  39	return -ETIMEDOUT;
  40}
  41EXPORT_SYMBOL(_il_poll_bit);
  42
  43void
  44il_set_bit(struct il_priv *p, u32 r, u32 m)
  45{
  46	unsigned long reg_flags;
  47
  48	spin_lock_irqsave(&p->reg_lock, reg_flags);
  49	_il_set_bit(p, r, m);
  50	spin_unlock_irqrestore(&p->reg_lock, reg_flags);
  51}
  52EXPORT_SYMBOL(il_set_bit);
  53
  54void
  55il_clear_bit(struct il_priv *p, u32 r, u32 m)
  56{
  57	unsigned long reg_flags;
  58
  59	spin_lock_irqsave(&p->reg_lock, reg_flags);
  60	_il_clear_bit(p, r, m);
  61	spin_unlock_irqrestore(&p->reg_lock, reg_flags);
  62}
  63EXPORT_SYMBOL(il_clear_bit);
  64
  65bool
  66_il_grab_nic_access(struct il_priv *il)
  67{
  68	int ret;
  69	u32 val;
  70
  71	/* this bit wakes up the NIC */
  72	_il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
  73
  74	/*
  75	 * These bits say the device is running, and should keep running for
  76	 * at least a short while (at least as long as MAC_ACCESS_REQ stays 1),
  77	 * but they do not indicate that embedded SRAM is restored yet;
  78	 * 3945 and 4965 have volatile SRAM, and must save/restore contents
  79	 * to/from host DRAM when sleeping/waking for power-saving.
  80	 * Each direction takes approximately 1/4 millisecond; with this
  81	 * overhead, it's a good idea to grab and hold MAC_ACCESS_REQUEST if a
  82	 * series of register accesses are expected (e.g. reading Event Log),
  83	 * to keep device from sleeping.
  84	 *
  85	 * CSR_UCODE_DRV_GP1 register bit MAC_SLEEP == 0 indicates that
  86	 * SRAM is okay/restored.  We don't check that here because this call
  87	 * is just for hardware register access; but GP1 MAC_SLEEP check is a
  88	 * good idea before accessing 3945/4965 SRAM (e.g. reading Event Log).
  89	 *
  90	 */
  91	ret =
  92	    _il_poll_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN,
  93			 (CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
  94			  CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000);
  95	if (unlikely(ret < 0)) {
  96		val = _il_rd(il, CSR_GP_CNTRL);
  97		WARN_ONCE(1, "Timeout waiting for ucode processor access "
  98			     "(CSR_GP_CNTRL 0x%08x)\n", val);
  99		_il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_FORCE_NMI);
 100		return false;
 101	}
 102
 103	return true;
 104}
 105EXPORT_SYMBOL_GPL(_il_grab_nic_access);
 106
 107int
 108il_poll_bit(struct il_priv *il, u32 addr, u32 mask, int timeout)
 109{
 110	const int interval = 10; /* microseconds */
 111	int t = 0;
 112
 113	do {
 114		if ((il_rd(il, addr) & mask) == mask)
 115			return t;
 116		udelay(interval);
 117		t += interval;
 118	} while (t < timeout);
 119
 120	return -ETIMEDOUT;
 121}
 122EXPORT_SYMBOL(il_poll_bit);
 123
 124u32
 125il_rd_prph(struct il_priv *il, u32 reg)
 126{
 127	unsigned long reg_flags;
 128	u32 val;
 129
 130	spin_lock_irqsave(&il->reg_lock, reg_flags);
 131	_il_grab_nic_access(il);
 132	val = _il_rd_prph(il, reg);
 133	_il_release_nic_access(il);
 134	spin_unlock_irqrestore(&il->reg_lock, reg_flags);
 135	return val;
 136}
 137EXPORT_SYMBOL(il_rd_prph);
 138
 139void
 140il_wr_prph(struct il_priv *il, u32 addr, u32 val)
 141{
 142	unsigned long reg_flags;
 143
 144	spin_lock_irqsave(&il->reg_lock, reg_flags);
 145	if (likely(_il_grab_nic_access(il))) {
 146		_il_wr_prph(il, addr, val);
 147		_il_release_nic_access(il);
 148	}
 149	spin_unlock_irqrestore(&il->reg_lock, reg_flags);
 150}
 151EXPORT_SYMBOL(il_wr_prph);
 152
 153u32
 154il_read_targ_mem(struct il_priv *il, u32 addr)
 155{
 156	unsigned long reg_flags;
 157	u32 value;
 158
 159	spin_lock_irqsave(&il->reg_lock, reg_flags);
 160	_il_grab_nic_access(il);
 161
 162	_il_wr(il, HBUS_TARG_MEM_RADDR, addr);
 163	value = _il_rd(il, HBUS_TARG_MEM_RDAT);
 164
 165	_il_release_nic_access(il);
 166	spin_unlock_irqrestore(&il->reg_lock, reg_flags);
 167	return value;
 168}
 169EXPORT_SYMBOL(il_read_targ_mem);
 170
 171void
 172il_write_targ_mem(struct il_priv *il, u32 addr, u32 val)
 173{
 174	unsigned long reg_flags;
 175
 176	spin_lock_irqsave(&il->reg_lock, reg_flags);
 177	if (likely(_il_grab_nic_access(il))) {
 178		_il_wr(il, HBUS_TARG_MEM_WADDR, addr);
 179		_il_wr(il, HBUS_TARG_MEM_WDAT, val);
 180		_il_release_nic_access(il);
 181	}
 182	spin_unlock_irqrestore(&il->reg_lock, reg_flags);
 183}
 184EXPORT_SYMBOL(il_write_targ_mem);
 185
 186const char *
 187il_get_cmd_string(u8 cmd)
 188{
 189	switch (cmd) {
 190		IL_CMD(N_ALIVE);
 191		IL_CMD(N_ERROR);
 192		IL_CMD(C_RXON);
 193		IL_CMD(C_RXON_ASSOC);
 194		IL_CMD(C_QOS_PARAM);
 195		IL_CMD(C_RXON_TIMING);
 196		IL_CMD(C_ADD_STA);
 197		IL_CMD(C_REM_STA);
 198		IL_CMD(C_WEPKEY);
 199		IL_CMD(N_3945_RX);
 200		IL_CMD(C_TX);
 201		IL_CMD(C_RATE_SCALE);
 202		IL_CMD(C_LEDS);
 203		IL_CMD(C_TX_LINK_QUALITY_CMD);
 204		IL_CMD(C_CHANNEL_SWITCH);
 205		IL_CMD(N_CHANNEL_SWITCH);
 206		IL_CMD(C_SPECTRUM_MEASUREMENT);
 207		IL_CMD(N_SPECTRUM_MEASUREMENT);
 208		IL_CMD(C_POWER_TBL);
 209		IL_CMD(N_PM_SLEEP);
 210		IL_CMD(N_PM_DEBUG_STATS);
 211		IL_CMD(C_SCAN);
 212		IL_CMD(C_SCAN_ABORT);
 213		IL_CMD(N_SCAN_START);
 214		IL_CMD(N_SCAN_RESULTS);
 215		IL_CMD(N_SCAN_COMPLETE);
 216		IL_CMD(N_BEACON);
 217		IL_CMD(C_TX_BEACON);
 218		IL_CMD(C_TX_PWR_TBL);
 219		IL_CMD(C_BT_CONFIG);
 220		IL_CMD(C_STATS);
 221		IL_CMD(N_STATS);
 222		IL_CMD(N_CARD_STATE);
 223		IL_CMD(N_MISSED_BEACONS);
 224		IL_CMD(C_CT_KILL_CONFIG);
 225		IL_CMD(C_SENSITIVITY);
 226		IL_CMD(C_PHY_CALIBRATION);
 227		IL_CMD(N_RX_PHY);
 228		IL_CMD(N_RX_MPDU);
 229		IL_CMD(N_RX);
 230		IL_CMD(N_COMPRESSED_BA);
 231	default:
 232		return "UNKNOWN";
 233
 234	}
 235}
 236EXPORT_SYMBOL(il_get_cmd_string);
 237
 238#define HOST_COMPLETE_TIMEOUT (HZ / 2)
 239
 240static void
 241il_generic_cmd_callback(struct il_priv *il, struct il_device_cmd *cmd,
 242			struct il_rx_pkt *pkt)
 243{
 244	if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
 245		IL_ERR("Bad return from %s (0x%08X)\n",
 246		       il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
 247		return;
 248	}
 249#ifdef CONFIG_IWLEGACY_DEBUG
 250	switch (cmd->hdr.cmd) {
 251	case C_TX_LINK_QUALITY_CMD:
 252	case C_SENSITIVITY:
 253		D_HC_DUMP("back from %s (0x%08X)\n",
 254			  il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
 255		break;
 256	default:
 257		D_HC("back from %s (0x%08X)\n", il_get_cmd_string(cmd->hdr.cmd),
 258		     pkt->hdr.flags);
 259	}
 260#endif
 261}
 262
 263static int
 264il_send_cmd_async(struct il_priv *il, struct il_host_cmd *cmd)
 265{
 266	int ret;
 267
 268	BUG_ON(!(cmd->flags & CMD_ASYNC));
 269
 270	/* An asynchronous command can not expect an SKB to be set. */
 271	BUG_ON(cmd->flags & CMD_WANT_SKB);
 272
 273	/* Assign a generic callback if one is not provided */
 274	if (!cmd->callback)
 275		cmd->callback = il_generic_cmd_callback;
 276
 277	if (test_bit(S_EXIT_PENDING, &il->status))
 278		return -EBUSY;
 279
 280	ret = il_enqueue_hcmd(il, cmd);
 281	if (ret < 0) {
 282		IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n",
 283		       il_get_cmd_string(cmd->id), ret);
 284		return ret;
 285	}
 286	return 0;
 287}
 288
 289int
 290il_send_cmd_sync(struct il_priv *il, struct il_host_cmd *cmd)
 291{
 292	int cmd_idx;
 293	int ret;
 294
 295	lockdep_assert_held(&il->mutex);
 296
 297	BUG_ON(cmd->flags & CMD_ASYNC);
 298
 299	/* A synchronous command can not have a callback set. */
 300	BUG_ON(cmd->callback);
 301
 302	D_INFO("Attempting to send sync command %s\n",
 303	       il_get_cmd_string(cmd->id));
 304
 305	set_bit(S_HCMD_ACTIVE, &il->status);
 306	D_INFO("Setting HCMD_ACTIVE for command %s\n",
 307	       il_get_cmd_string(cmd->id));
 308
 309	cmd_idx = il_enqueue_hcmd(il, cmd);
 310	if (cmd_idx < 0) {
 311		ret = cmd_idx;
 312		IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n",
 313		       il_get_cmd_string(cmd->id), ret);
 314		goto out;
 315	}
 316
 317	ret = wait_event_timeout(il->wait_command_queue,
 318				 !test_bit(S_HCMD_ACTIVE, &il->status),
 319				 HOST_COMPLETE_TIMEOUT);
 320	if (!ret) {
 321		if (test_bit(S_HCMD_ACTIVE, &il->status)) {
 322			IL_ERR("Error sending %s: time out after %dms.\n",
 323			       il_get_cmd_string(cmd->id),
 324			       jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
 325
 326			clear_bit(S_HCMD_ACTIVE, &il->status);
 327			D_INFO("Clearing HCMD_ACTIVE for command %s\n",
 328			       il_get_cmd_string(cmd->id));
 329			ret = -ETIMEDOUT;
 330			goto cancel;
 331		}
 332	}
 333
 334	if (test_bit(S_RFKILL, &il->status)) {
 335		IL_ERR("Command %s aborted: RF KILL Switch\n",
 336		       il_get_cmd_string(cmd->id));
 337		ret = -ECANCELED;
 338		goto fail;
 339	}
 340	if (test_bit(S_FW_ERROR, &il->status)) {
 341		IL_ERR("Command %s failed: FW Error\n",
 342		       il_get_cmd_string(cmd->id));
 343		ret = -EIO;
 344		goto fail;
 345	}
 346	if ((cmd->flags & CMD_WANT_SKB) && !cmd->reply_page) {
 347		IL_ERR("Error: Response NULL in '%s'\n",
 348		       il_get_cmd_string(cmd->id));
 349		ret = -EIO;
 350		goto cancel;
 351	}
 352
 353	ret = 0;
 354	goto out;
 355
 356cancel:
 357	if (cmd->flags & CMD_WANT_SKB) {
 358		/*
 359		 * Cancel the CMD_WANT_SKB flag for the cmd in the
 360		 * TX cmd queue. Otherwise in case the cmd comes
 361		 * in later, it will possibly set an invalid
 362		 * address (cmd->meta.source).
 363		 */
 364		il->txq[il->cmd_queue].meta[cmd_idx].flags &= ~CMD_WANT_SKB;
 365	}
 366fail:
 367	if (cmd->reply_page) {
 368		il_free_pages(il, cmd->reply_page);
 369		cmd->reply_page = 0;
 370	}
 371out:
 372	return ret;
 373}
 374EXPORT_SYMBOL(il_send_cmd_sync);
 375
 376int
 377il_send_cmd(struct il_priv *il, struct il_host_cmd *cmd)
 378{
 379	if (cmd->flags & CMD_ASYNC)
 380		return il_send_cmd_async(il, cmd);
 381
 382	return il_send_cmd_sync(il, cmd);
 383}
 384EXPORT_SYMBOL(il_send_cmd);
 385
 386int
 387il_send_cmd_pdu(struct il_priv *il, u8 id, u16 len, const void *data)
 388{
 389	struct il_host_cmd cmd = {
 390		.id = id,
 391		.len = len,
 392		.data = data,
 393	};
 394
 395	return il_send_cmd_sync(il, &cmd);
 396}
 397EXPORT_SYMBOL(il_send_cmd_pdu);
 398
 399int
 400il_send_cmd_pdu_async(struct il_priv *il, u8 id, u16 len, const void *data,
 401		      void (*callback) (struct il_priv *il,
 402					struct il_device_cmd *cmd,
 403					struct il_rx_pkt *pkt))
 404{
 405	struct il_host_cmd cmd = {
 406		.id = id,
 407		.len = len,
 408		.data = data,
 409	};
 410
 411	cmd.flags |= CMD_ASYNC;
 412	cmd.callback = callback;
 413
 414	return il_send_cmd_async(il, &cmd);
 415}
 416EXPORT_SYMBOL(il_send_cmd_pdu_async);
 417
 418/* default: IL_LED_BLINK(0) using blinking idx table */
 419static int led_mode;
 420module_param(led_mode, int, 0444);
 421MODULE_PARM_DESC(led_mode,
 422		 "0=system default, " "1=On(RF On)/Off(RF Off), 2=blinking");
 423
 424/* Throughput		OFF time(ms)	ON time (ms)
 425 *	>300			25		25
 426 *	>200 to 300		40		40
 427 *	>100 to 200		55		55
 428 *	>70 to 100		65		65
 429 *	>50 to 70		75		75
 430 *	>20 to 50		85		85
 431 *	>10 to 20		95		95
 432 *	>5 to 10		110		110
 433 *	>1 to 5			130		130
 434 *	>0 to 1			167		167
 435 *	<=0					SOLID ON
 436 */
 437static const struct ieee80211_tpt_blink il_blink[] = {
 438	{.throughput = 0,		.blink_time = 334},
 439	{.throughput = 1 * 1024 - 1,	.blink_time = 260},
 440	{.throughput = 5 * 1024 - 1,	.blink_time = 220},
 441	{.throughput = 10 * 1024 - 1,	.blink_time = 190},
 442	{.throughput = 20 * 1024 - 1,	.blink_time = 170},
 443	{.throughput = 50 * 1024 - 1,	.blink_time = 150},
 444	{.throughput = 70 * 1024 - 1,	.blink_time = 130},
 445	{.throughput = 100 * 1024 - 1,	.blink_time = 110},
 446	{.throughput = 200 * 1024 - 1,	.blink_time = 80},
 447	{.throughput = 300 * 1024 - 1,	.blink_time = 50},
 448};
 449
 450/*
 451 * Adjust led blink rate to compensate on a MAC Clock difference on every HW
 452 * Led blink rate analysis showed an average deviation of 0% on 3945,
 453 * 5% on 4965 HW.
 454 * Need to compensate on the led on/off time per HW according to the deviation
 455 * to achieve the desired led frequency
 456 * The calculation is: (100-averageDeviation)/100 * blinkTime
 457 * For code efficiency the calculation will be:
 458 *     compensation = (100 - averageDeviation) * 64 / 100
 459 *     NewBlinkTime = (compensation * BlinkTime) / 64
 460 */
 461static inline u8
 462il_blink_compensation(struct il_priv *il, u8 time, u16 compensation)
 463{
 464	if (!compensation) {
 465		IL_ERR("undefined blink compensation: "
 466		       "use pre-defined blinking time\n");
 467		return time;
 468	}
 469
 470	return (u8) ((time * compensation) >> 6);
 471}
 472
 473/* Set led pattern command */
 474static int
 475il_led_cmd(struct il_priv *il, unsigned long on, unsigned long off)
 476{
 477	struct il_led_cmd led_cmd = {
 478		.id = IL_LED_LINK,
 479		.interval = IL_DEF_LED_INTRVL
 480	};
 481	int ret;
 482
 483	if (!test_bit(S_READY, &il->status))
 484		return -EBUSY;
 485
 486	if (il->blink_on == on && il->blink_off == off)
 487		return 0;
 488
 489	if (off == 0) {
 490		/* led is SOLID_ON */
 491		on = IL_LED_SOLID;
 492	}
 493
 494	D_LED("Led blink time compensation=%u\n",
 495	      il->cfg->led_compensation);
 496	led_cmd.on =
 497	    il_blink_compensation(il, on,
 498				  il->cfg->led_compensation);
 499	led_cmd.off =
 500	    il_blink_compensation(il, off,
 501				  il->cfg->led_compensation);
 502
 503	ret = il->ops->send_led_cmd(il, &led_cmd);
 504	if (!ret) {
 505		il->blink_on = on;
 506		il->blink_off = off;
 507	}
 508	return ret;
 509}
 510
 511static void
 512il_led_brightness_set(struct led_classdev *led_cdev,
 513		      enum led_brightness brightness)
 514{
 515	struct il_priv *il = container_of(led_cdev, struct il_priv, led);
 516	unsigned long on = 0;
 517
 518	if (brightness > 0)
 519		on = IL_LED_SOLID;
 520
 521	il_led_cmd(il, on, 0);
 522}
 523
 524static int
 525il_led_blink_set(struct led_classdev *led_cdev, unsigned long *delay_on,
 526		 unsigned long *delay_off)
 527{
 528	struct il_priv *il = container_of(led_cdev, struct il_priv, led);
 529
 530	return il_led_cmd(il, *delay_on, *delay_off);
 531}
 532
 533void
 534il_leds_init(struct il_priv *il)
 535{
 536	int mode = led_mode;
 537	int ret;
 538
 539	if (mode == IL_LED_DEFAULT)
 540		mode = il->cfg->led_mode;
 541
 542	il->led.name =
 543	    kasprintf(GFP_KERNEL, "%s-led", wiphy_name(il->hw->wiphy));
 544	if (!il->led.name)
 545		return;
 546
 547	il->led.brightness_set = il_led_brightness_set;
 548	il->led.blink_set = il_led_blink_set;
 549	il->led.max_brightness = 1;
 550
 551	switch (mode) {
 552	case IL_LED_DEFAULT:
 553		WARN_ON(1);
 554		break;
 555	case IL_LED_BLINK:
 556		il->led.default_trigger =
 557		    ieee80211_create_tpt_led_trigger(il->hw,
 558						     IEEE80211_TPT_LEDTRIG_FL_CONNECTED,
 559						     il_blink,
 560						     ARRAY_SIZE(il_blink));
 561		break;
 562	case IL_LED_RF_STATE:
 563		il->led.default_trigger = ieee80211_get_radio_led_name(il->hw);
 564		break;
 565	}
 566
 567	ret = led_classdev_register(&il->pci_dev->dev, &il->led);
 568	if (ret) {
 569		kfree(il->led.name);
 570		return;
 571	}
 572
 573	il->led_registered = true;
 574}
 575EXPORT_SYMBOL(il_leds_init);
 576
 577void
 578il_leds_exit(struct il_priv *il)
 579{
 580	if (!il->led_registered)
 581		return;
 582
 583	led_classdev_unregister(&il->led);
 584	kfree(il->led.name);
 585}
 586EXPORT_SYMBOL(il_leds_exit);
 587
 588/************************** EEPROM BANDS ****************************
 589 *
 590 * The il_eeprom_band definitions below provide the mapping from the
 591 * EEPROM contents to the specific channel number supported for each
 592 * band.
 593 *
 594 * For example, il_priv->eeprom.band_3_channels[4] from the band_3
 595 * definition below maps to physical channel 42 in the 5.2GHz spectrum.
 596 * The specific geography and calibration information for that channel
 597 * is contained in the eeprom map itself.
 598 *
 599 * During init, we copy the eeprom information and channel map
 600 * information into il->channel_info_24/52 and il->channel_map_24/52
 601 *
 602 * channel_map_24/52 provides the idx in the channel_info array for a
 603 * given channel.  We have to have two separate maps as there is channel
 604 * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
 605 * band_2
 606 *
 607 * A value of 0xff stored in the channel_map indicates that the channel
 608 * is not supported by the hardware at all.
 609 *
 610 * A value of 0xfe in the channel_map indicates that the channel is not
 611 * valid for Tx with the current hardware.  This means that
 612 * while the system can tune and receive on a given channel, it may not
 613 * be able to associate or transmit any frames on that
 614 * channel.  There is no corresponding channel information for that
 615 * entry.
 616 *
 617 *********************************************************************/
 618
 619/* 2.4 GHz */
 620const u8 il_eeprom_band_1[14] = {
 621	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
 622};
 623
 624/* 5.2 GHz bands */
 625static const u8 il_eeprom_band_2[] = {	/* 4915-5080MHz */
 626	183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
 627};
 628
 629static const u8 il_eeprom_band_3[] = {	/* 5170-5320MHz */
 630	34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
 631};
 632
 633static const u8 il_eeprom_band_4[] = {	/* 5500-5700MHz */
 634	100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
 635};
 636
 637static const u8 il_eeprom_band_5[] = {	/* 5725-5825MHz */
 638	145, 149, 153, 157, 161, 165
 639};
 640
 641static const u8 il_eeprom_band_6[] = {	/* 2.4 ht40 channel */
 642	1, 2, 3, 4, 5, 6, 7
 643};
 644
 645static const u8 il_eeprom_band_7[] = {	/* 5.2 ht40 channel */
 646	36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
 647};
 648
 649/******************************************************************************
 650 *
 651 * EEPROM related functions
 652 *
 653******************************************************************************/
 654
 655static int
 656il_eeprom_verify_signature(struct il_priv *il)
 657{
 658	u32 gp = _il_rd(il, CSR_EEPROM_GP) & CSR_EEPROM_GP_VALID_MSK;
 659	int ret = 0;
 660
 661	D_EEPROM("EEPROM signature=0x%08x\n", gp);
 662	switch (gp) {
 663	case CSR_EEPROM_GP_GOOD_SIG_EEP_LESS_THAN_4K:
 664	case CSR_EEPROM_GP_GOOD_SIG_EEP_MORE_THAN_4K:
 665		break;
 666	default:
 667		IL_ERR("bad EEPROM signature," "EEPROM_GP=0x%08x\n", gp);
 668		ret = -ENOENT;
 669		break;
 670	}
 671	return ret;
 672}
 673
 674const u8 *
 675il_eeprom_query_addr(const struct il_priv *il, size_t offset)
 676{
 677	BUG_ON(offset >= il->cfg->eeprom_size);
 678	return &il->eeprom[offset];
 679}
 680EXPORT_SYMBOL(il_eeprom_query_addr);
 681
 682u16
 683il_eeprom_query16(const struct il_priv *il, size_t offset)
 684{
 685	if (!il->eeprom)
 686		return 0;
 687	return (u16) il->eeprom[offset] | ((u16) il->eeprom[offset + 1] << 8);
 688}
 689EXPORT_SYMBOL(il_eeprom_query16);
 690
 691/*
 692 * il_eeprom_init - read EEPROM contents
 693 *
 694 * Load the EEPROM contents from adapter into il->eeprom
 695 *
 696 * NOTE:  This routine uses the non-debug IO access functions.
 697 */
 698int
 699il_eeprom_init(struct il_priv *il)
 700{
 701	__le16 *e;
 702	u32 gp = _il_rd(il, CSR_EEPROM_GP);
 703	int sz;
 704	int ret;
 705	int addr;
 706
 707	/* allocate eeprom */
 708	sz = il->cfg->eeprom_size;
 709	D_EEPROM("NVM size = %d\n", sz);
 710	il->eeprom = kzalloc(sz, GFP_KERNEL);
 711	if (!il->eeprom)
 712		return -ENOMEM;
 713
 714	e = (__le16 *) il->eeprom;
 715
 716	il->ops->apm_init(il);
 717
 718	ret = il_eeprom_verify_signature(il);
 719	if (ret < 0) {
 720		IL_ERR("EEPROM not found, EEPROM_GP=0x%08x\n", gp);
 721		ret = -ENOENT;
 722		goto err;
 723	}
 724
 725	/* Make sure driver (instead of uCode) is allowed to read EEPROM */
 726	ret = il->ops->eeprom_acquire_semaphore(il);
 727	if (ret < 0) {
 728		IL_ERR("Failed to acquire EEPROM semaphore.\n");
 729		ret = -ENOENT;
 730		goto err;
 731	}
 732
 733	/* eeprom is an array of 16bit values */
 734	for (addr = 0; addr < sz; addr += sizeof(u16)) {
 735		u32 r;
 736
 737		_il_wr(il, CSR_EEPROM_REG,
 738		       CSR_EEPROM_REG_MSK_ADDR & (addr << 1));
 739
 740		ret =
 741		    _il_poll_bit(il, CSR_EEPROM_REG,
 742				 CSR_EEPROM_REG_READ_VALID_MSK,
 743				 CSR_EEPROM_REG_READ_VALID_MSK,
 744				 IL_EEPROM_ACCESS_TIMEOUT);
 745		if (ret < 0) {
 746			IL_ERR("Time out reading EEPROM[%d]\n", addr);
 747			goto done;
 748		}
 749		r = _il_rd(il, CSR_EEPROM_REG);
 750		e[addr / 2] = cpu_to_le16(r >> 16);
 751	}
 752
 753	D_EEPROM("NVM Type: %s, version: 0x%x\n", "EEPROM",
 754		 il_eeprom_query16(il, EEPROM_VERSION));
 755
 756	ret = 0;
 757done:
 758	il->ops->eeprom_release_semaphore(il);
 759
 760err:
 761	if (ret)
 762		il_eeprom_free(il);
 763	/* Reset chip to save power until we load uCode during "up". */
 764	il_apm_stop(il);
 765	return ret;
 766}
 767EXPORT_SYMBOL(il_eeprom_init);
 768
 769void
 770il_eeprom_free(struct il_priv *il)
 771{
 772	kfree(il->eeprom);
 773	il->eeprom = NULL;
 774}
 775EXPORT_SYMBOL(il_eeprom_free);
 776
 777static void
 778il_init_band_reference(const struct il_priv *il, int eep_band,
 779		       int *eeprom_ch_count,
 780		       const struct il_eeprom_channel **eeprom_ch_info,
 781		       const u8 **eeprom_ch_idx)
 782{
 783	u32 offset = il->cfg->regulatory_bands[eep_band - 1];
 784
 785	switch (eep_band) {
 786	case 1:		/* 2.4GHz band */
 787		*eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_1);
 788		*eeprom_ch_info =
 789		    (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 790								     offset);
 791		*eeprom_ch_idx = il_eeprom_band_1;
 792		break;
 793	case 2:		/* 4.9GHz band */
 794		*eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_2);
 795		*eeprom_ch_info =
 796		    (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 797								     offset);
 798		*eeprom_ch_idx = il_eeprom_band_2;
 799		break;
 800	case 3:		/* 5.2GHz band */
 801		*eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_3);
 802		*eeprom_ch_info =
 803		    (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 804								     offset);
 805		*eeprom_ch_idx = il_eeprom_band_3;
 806		break;
 807	case 4:		/* 5.5GHz band */
 808		*eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_4);
 809		*eeprom_ch_info =
 810		    (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 811								     offset);
 812		*eeprom_ch_idx = il_eeprom_band_4;
 813		break;
 814	case 5:		/* 5.7GHz band */
 815		*eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_5);
 816		*eeprom_ch_info =
 817		    (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 818								     offset);
 819		*eeprom_ch_idx = il_eeprom_band_5;
 820		break;
 821	case 6:		/* 2.4GHz ht40 channels */
 822		*eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_6);
 823		*eeprom_ch_info =
 824		    (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 825								     offset);
 826		*eeprom_ch_idx = il_eeprom_band_6;
 827		break;
 828	case 7:		/* 5 GHz ht40 channels */
 829		*eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_7);
 830		*eeprom_ch_info =
 831		    (struct il_eeprom_channel *)il_eeprom_query_addr(il,
 832								     offset);
 833		*eeprom_ch_idx = il_eeprom_band_7;
 834		break;
 835	default:
 836		BUG();
 837	}
 838}
 839
 840#define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
 841			    ? # x " " : "")
 842/*
 843 * il_mod_ht40_chan_info - Copy ht40 channel info into driver's il.
 844 *
 845 * Does not set up a command, or touch hardware.
 846 */
 847static int
 848il_mod_ht40_chan_info(struct il_priv *il, enum nl80211_band band, u16 channel,
 849		      const struct il_eeprom_channel *eeprom_ch,
 850		      u8 clear_ht40_extension_channel)
 851{
 852	struct il_channel_info *ch_info;
 853
 854	ch_info =
 855	    (struct il_channel_info *)il_get_channel_info(il, band, channel);
 856
 857	if (!il_is_channel_valid(ch_info))
 858		return -1;
 859
 860	D_EEPROM("HT40 Ch. %d [%sGHz] %s%s%s%s%s(0x%02x %ddBm):"
 861		 " Ad-Hoc %ssupported\n", ch_info->channel,
 862		 il_is_channel_a_band(ch_info) ? "5.2" : "2.4",
 863		 CHECK_AND_PRINT(IBSS), CHECK_AND_PRINT(ACTIVE),
 864		 CHECK_AND_PRINT(RADAR), CHECK_AND_PRINT(WIDE),
 865		 CHECK_AND_PRINT(DFS), eeprom_ch->flags,
 866		 eeprom_ch->max_power_avg,
 867		 ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS) &&
 868		  !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ? "" : "not ");
 869
 870	ch_info->ht40_eeprom = *eeprom_ch;
 871	ch_info->ht40_max_power_avg = eeprom_ch->max_power_avg;
 872	ch_info->ht40_flags = eeprom_ch->flags;
 873	if (eeprom_ch->flags & EEPROM_CHANNEL_VALID)
 874		ch_info->ht40_extension_channel &=
 875		    ~clear_ht40_extension_channel;
 876
 877	return 0;
 878}
 879
 880#define CHECK_AND_PRINT_I(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
 881			    ? # x " " : "")
 882
 883/*
 884 * il_init_channel_map - Set up driver's info for all possible channels
 885 */
 886int
 887il_init_channel_map(struct il_priv *il)
 888{
 889	int eeprom_ch_count = 0;
 890	const u8 *eeprom_ch_idx = NULL;
 891	const struct il_eeprom_channel *eeprom_ch_info = NULL;
 892	int band, ch;
 893	struct il_channel_info *ch_info;
 894
 895	if (il->channel_count) {
 896		D_EEPROM("Channel map already initialized.\n");
 897		return 0;
 898	}
 899
 900	D_EEPROM("Initializing regulatory info from EEPROM\n");
 901
 902	il->channel_count =
 903	    ARRAY_SIZE(il_eeprom_band_1) + ARRAY_SIZE(il_eeprom_band_2) +
 904	    ARRAY_SIZE(il_eeprom_band_3) + ARRAY_SIZE(il_eeprom_band_4) +
 905	    ARRAY_SIZE(il_eeprom_band_5);
 906
 907	D_EEPROM("Parsing data for %d channels.\n", il->channel_count);
 908
 909	il->channel_info =
 910	    kcalloc(il->channel_count, sizeof(struct il_channel_info),
 911		    GFP_KERNEL);
 912	if (!il->channel_info) {
 913		IL_ERR("Could not allocate channel_info\n");
 914		il->channel_count = 0;
 915		return -ENOMEM;
 916	}
 917
 918	ch_info = il->channel_info;
 919
 920	/* Loop through the 5 EEPROM bands adding them in order to the
 921	 * channel map we maintain (that contains additional information than
 922	 * what just in the EEPROM) */
 923	for (band = 1; band <= 5; band++) {
 924
 925		il_init_band_reference(il, band, &eeprom_ch_count,
 926				       &eeprom_ch_info, &eeprom_ch_idx);
 927
 928		/* Loop through each band adding each of the channels */
 929		for (ch = 0; ch < eeprom_ch_count; ch++) {
 930			ch_info->channel = eeprom_ch_idx[ch];
 931			ch_info->band =
 932			    (band ==
 933			     1) ? NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
 934
 935			/* permanently store EEPROM's channel regulatory flags
 936			 *   and max power in channel info database. */
 937			ch_info->eeprom = eeprom_ch_info[ch];
 938
 939			/* Copy the run-time flags so they are there even on
 940			 * invalid channels */
 941			ch_info->flags = eeprom_ch_info[ch].flags;
 942			/* First write that ht40 is not enabled, and then enable
 943			 * one by one */
 944			ch_info->ht40_extension_channel =
 945			    IEEE80211_CHAN_NO_HT40;
 946
 947			if (!(il_is_channel_valid(ch_info))) {
 948				D_EEPROM("Ch. %d Flags %x [%sGHz] - "
 949					 "No traffic\n", ch_info->channel,
 950					 ch_info->flags,
 951					 il_is_channel_a_band(ch_info) ? "5.2" :
 952					 "2.4");
 953				ch_info++;
 954				continue;
 955			}
 956
 957			/* Initialize regulatory-based run-time data */
 958			ch_info->max_power_avg = ch_info->curr_txpow =
 959			    eeprom_ch_info[ch].max_power_avg;
 960			ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
 961			ch_info->min_power = 0;
 962
 963			D_EEPROM("Ch. %d [%sGHz] " "%s%s%s%s%s%s(0x%02x %ddBm):"
 964				 " Ad-Hoc %ssupported\n", ch_info->channel,
 965				 il_is_channel_a_band(ch_info) ? "5.2" : "2.4",
 966				 CHECK_AND_PRINT_I(VALID),
 967				 CHECK_AND_PRINT_I(IBSS),
 968				 CHECK_AND_PRINT_I(ACTIVE),
 969				 CHECK_AND_PRINT_I(RADAR),
 970				 CHECK_AND_PRINT_I(WIDE),
 971				 CHECK_AND_PRINT_I(DFS),
 972				 eeprom_ch_info[ch].flags,
 973				 eeprom_ch_info[ch].max_power_avg,
 974				 ((eeprom_ch_info[ch].
 975				   flags & EEPROM_CHANNEL_IBSS) &&
 976				  !(eeprom_ch_info[ch].
 977				    flags & EEPROM_CHANNEL_RADAR)) ? "" :
 978				 "not ");
 979
 980			ch_info++;
 981		}
 982	}
 983
 984	/* Check if we do have HT40 channels */
 985	if (il->cfg->regulatory_bands[5] == EEPROM_REGULATORY_BAND_NO_HT40 &&
 986	    il->cfg->regulatory_bands[6] == EEPROM_REGULATORY_BAND_NO_HT40)
 987		return 0;
 988
 989	/* Two additional EEPROM bands for 2.4 and 5 GHz HT40 channels */
 990	for (band = 6; band <= 7; band++) {
 991		enum nl80211_band ieeeband;
 992
 993		il_init_band_reference(il, band, &eeprom_ch_count,
 994				       &eeprom_ch_info, &eeprom_ch_idx);
 995
 996		/* EEPROM band 6 is 2.4, band 7 is 5 GHz */
 997		ieeeband =
 998		    (band == 6) ? NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
 999
1000		/* Loop through each band adding each of the channels */
1001		for (ch = 0; ch < eeprom_ch_count; ch++) {
1002			/* Set up driver's info for lower half */
1003			il_mod_ht40_chan_info(il, ieeeband, eeprom_ch_idx[ch],
1004					      &eeprom_ch_info[ch],
1005					      IEEE80211_CHAN_NO_HT40PLUS);
1006
1007			/* Set up driver's info for upper half */
1008			il_mod_ht40_chan_info(il, ieeeband,
1009					      eeprom_ch_idx[ch] + 4,
1010					      &eeprom_ch_info[ch],
1011					      IEEE80211_CHAN_NO_HT40MINUS);
1012		}
1013	}
1014
1015	return 0;
1016}
1017EXPORT_SYMBOL(il_init_channel_map);
1018
1019/*
1020 * il_free_channel_map - undo allocations in il_init_channel_map
1021 */
1022void
1023il_free_channel_map(struct il_priv *il)
1024{
1025	kfree(il->channel_info);
1026	il->channel_count = 0;
1027}
1028EXPORT_SYMBOL(il_free_channel_map);
1029
1030/*
1031 * il_get_channel_info - Find driver's ilate channel info
1032 *
1033 * Based on band and channel number.
1034 */
1035const struct il_channel_info *
1036il_get_channel_info(const struct il_priv *il, enum nl80211_band band,
1037		    u16 channel)
1038{
1039	int i;
1040
1041	switch (band) {
1042	case NL80211_BAND_5GHZ:
1043		for (i = 14; i < il->channel_count; i++) {
1044			if (il->channel_info[i].channel == channel)
1045				return &il->channel_info[i];
1046		}
1047		break;
1048	case NL80211_BAND_2GHZ:
1049		if (channel >= 1 && channel <= 14)
1050			return &il->channel_info[channel - 1];
1051		break;
1052	default:
1053		BUG();
1054	}
1055
1056	return NULL;
1057}
1058EXPORT_SYMBOL(il_get_channel_info);
1059
1060/*
1061 * Setting power level allows the card to go to sleep when not busy.
1062 *
1063 * We calculate a sleep command based on the required latency, which
1064 * we get from mac80211.
1065 */
1066
1067#define SLP_VEC(X0, X1, X2, X3, X4) { \
1068		cpu_to_le32(X0), \
1069		cpu_to_le32(X1), \
1070		cpu_to_le32(X2), \
1071		cpu_to_le32(X3), \
1072		cpu_to_le32(X4)  \
1073}
1074
1075static void
1076il_build_powertable_cmd(struct il_priv *il, struct il_powertable_cmd *cmd)
1077{
1078	static const __le32 interval[3][IL_POWER_VEC_SIZE] = {
1079		SLP_VEC(2, 2, 4, 6, 0xFF),
1080		SLP_VEC(2, 4, 7, 10, 10),
1081		SLP_VEC(4, 7, 10, 10, 0xFF)
1082	};
1083	int i, dtim_period, no_dtim;
1084	u32 max_sleep;
1085	bool skip;
1086
1087	memset(cmd, 0, sizeof(*cmd));
1088
1089	if (il->power_data.pci_pm)
1090		cmd->flags |= IL_POWER_PCI_PM_MSK;
1091
1092	/* if no Power Save, we are done */
1093	if (il->power_data.ps_disabled)
1094		return;
1095
1096	cmd->flags = IL_POWER_DRIVER_ALLOW_SLEEP_MSK;
1097	cmd->keep_alive_seconds = 0;
1098	cmd->debug_flags = 0;
1099	cmd->rx_data_timeout = cpu_to_le32(25 * 1024);
1100	cmd->tx_data_timeout = cpu_to_le32(25 * 1024);
1101	cmd->keep_alive_beacons = 0;
1102
1103	dtim_period = il->vif ? il->vif->bss_conf.dtim_period : 0;
1104
1105	if (dtim_period <= 2) {
1106		memcpy(cmd->sleep_interval, interval[0], sizeof(interval[0]));
1107		no_dtim = 2;
1108	} else if (dtim_period <= 10) {
1109		memcpy(cmd->sleep_interval, interval[1], sizeof(interval[1]));
1110		no_dtim = 2;
1111	} else {
1112		memcpy(cmd->sleep_interval, interval[2], sizeof(interval[2]));
1113		no_dtim = 0;
1114	}
1115
1116	if (dtim_period == 0) {
1117		dtim_period = 1;
1118		skip = false;
1119	} else {
1120		skip = !!no_dtim;
1121	}
1122
1123	if (skip) {
1124		__le32 tmp = cmd->sleep_interval[IL_POWER_VEC_SIZE - 1];
1125
1126		max_sleep = le32_to_cpu(tmp);
1127		if (max_sleep == 0xFF)
1128			max_sleep = dtim_period * (skip + 1);
1129		else if (max_sleep >  dtim_period)
1130			max_sleep = (max_sleep / dtim_period) * dtim_period;
1131		cmd->flags |= IL_POWER_SLEEP_OVER_DTIM_MSK;
1132	} else {
1133		max_sleep = dtim_period;
1134		cmd->flags &= ~IL_POWER_SLEEP_OVER_DTIM_MSK;
1135	}
1136
1137	for (i = 0; i < IL_POWER_VEC_SIZE; i++)
1138		if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
1139			cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
1140}
1141
1142static int
1143il_set_power(struct il_priv *il, struct il_powertable_cmd *cmd)
1144{
1145	D_POWER("Sending power/sleep command\n");
1146	D_POWER("Flags value = 0x%08X\n", cmd->flags);
1147	D_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1148	D_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1149	D_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1150		le32_to_cpu(cmd->sleep_interval[0]),
1151		le32_to_cpu(cmd->sleep_interval[1]),
1152		le32_to_cpu(cmd->sleep_interval[2]),
1153		le32_to_cpu(cmd->sleep_interval[3]),
1154		le32_to_cpu(cmd->sleep_interval[4]));
1155
1156	return il_send_cmd_pdu(il, C_POWER_TBL,
1157			       sizeof(struct il_powertable_cmd), cmd);
1158}
1159
1160static int
1161il_power_set_mode(struct il_priv *il, struct il_powertable_cmd *cmd, bool force)
1162{
1163	int ret;
1164	bool update_chains;
1165
1166	lockdep_assert_held(&il->mutex);
1167
1168	/* Don't update the RX chain when chain noise calibration is running */
1169	update_chains = il->chain_noise_data.state == IL_CHAIN_NOISE_DONE ||
1170	    il->chain_noise_data.state == IL_CHAIN_NOISE_ALIVE;
1171
1172	if (!memcmp(&il->power_data.sleep_cmd, cmd, sizeof(*cmd)) && !force)
1173		return 0;
1174
1175	if (!il_is_ready_rf(il))
1176		return -EIO;
1177
1178	/* scan complete use sleep_power_next, need to be updated */
1179	memcpy(&il->power_data.sleep_cmd_next, cmd, sizeof(*cmd));
1180	if (test_bit(S_SCANNING, &il->status) && !force) {
1181		D_INFO("Defer power set mode while scanning\n");
1182		return 0;
1183	}
1184
1185	if (cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK)
1186		set_bit(S_POWER_PMI, &il->status);
1187
1188	ret = il_set_power(il, cmd);
1189	if (!ret) {
1190		if (!(cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK))
1191			clear_bit(S_POWER_PMI, &il->status);
1192
1193		if (il->ops->update_chain_flags && update_chains)
1194			il->ops->update_chain_flags(il);
1195		else if (il->ops->update_chain_flags)
1196			D_POWER("Cannot update the power, chain noise "
1197				"calibration running: %d\n",
1198				il->chain_noise_data.state);
1199
1200		memcpy(&il->power_data.sleep_cmd, cmd, sizeof(*cmd));
1201	} else
1202		IL_ERR("set power fail, ret = %d", ret);
1203
1204	return ret;
1205}
1206
1207int
1208il_power_update_mode(struct il_priv *il, bool force)
1209{
1210	struct il_powertable_cmd cmd;
1211
1212	il_build_powertable_cmd(il, &cmd);
1213
1214	return il_power_set_mode(il, &cmd, force);
1215}
1216EXPORT_SYMBOL(il_power_update_mode);
1217
1218/* initialize to default */
1219void
1220il_power_initialize(struct il_priv *il)
1221{
1222	u16 lctl;
1223
1224	pcie_capability_read_word(il->pci_dev, PCI_EXP_LNKCTL, &lctl);
1225	il->power_data.pci_pm = !(lctl & PCI_EXP_LNKCTL_ASPM_L0S);
1226
1227	il->power_data.debug_sleep_level_override = -1;
1228
1229	memset(&il->power_data.sleep_cmd, 0, sizeof(il->power_data.sleep_cmd));
1230}
1231EXPORT_SYMBOL(il_power_initialize);
1232
1233/* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
1234 * sending probe req.  This should be set long enough to hear probe responses
1235 * from more than one AP.  */
1236#define IL_ACTIVE_DWELL_TIME_24    (30)	/* all times in msec */
1237#define IL_ACTIVE_DWELL_TIME_52    (20)
1238
1239#define IL_ACTIVE_DWELL_FACTOR_24GHZ (3)
1240#define IL_ACTIVE_DWELL_FACTOR_52GHZ (2)
1241
1242/* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
1243 * Must be set longer than active dwell time.
1244 * For the most reliable scan, set > AP beacon interval (typically 100msec). */
1245#define IL_PASSIVE_DWELL_TIME_24   (20)	/* all times in msec */
1246#define IL_PASSIVE_DWELL_TIME_52   (10)
1247#define IL_PASSIVE_DWELL_BASE      (100)
1248#define IL_CHANNEL_TUNE_TIME       5
1249
1250static int
1251il_send_scan_abort(struct il_priv *il)
1252{
1253	int ret;
1254	struct il_rx_pkt *pkt;
1255	struct il_host_cmd cmd = {
1256		.id = C_SCAN_ABORT,
1257		.flags = CMD_WANT_SKB,
1258	};
1259
1260	/* Exit instantly with error when device is not ready
1261	 * to receive scan abort command or it does not perform
1262	 * hardware scan currently */
1263	if (!test_bit(S_READY, &il->status) ||
1264	    !test_bit(S_GEO_CONFIGURED, &il->status) ||
1265	    !test_bit(S_SCAN_HW, &il->status) ||
1266	    test_bit(S_FW_ERROR, &il->status) ||
1267	    test_bit(S_EXIT_PENDING, &il->status))
1268		return -EIO;
1269
1270	ret = il_send_cmd_sync(il, &cmd);
1271	if (ret)
1272		return ret;
1273
1274	pkt = (struct il_rx_pkt *)cmd.reply_page;
1275	if (pkt->u.status != CAN_ABORT_STATUS) {
1276		/* The scan abort will return 1 for success or
1277		 * 2 for "failure".  A failure condition can be
1278		 * due to simply not being in an active scan which
1279		 * can occur if we send the scan abort before we
1280		 * the microcode has notified us that a scan is
1281		 * completed. */
1282		D_SCAN("SCAN_ABORT ret %d.\n", pkt->u.status);
1283		ret = -EIO;
1284	}
1285
1286	il_free_pages(il, cmd.reply_page);
1287	return ret;
1288}
1289
1290static void
1291il_complete_scan(struct il_priv *il, bool aborted)
1292{
1293	struct cfg80211_scan_info info = {
1294		.aborted = aborted,
1295	};
1296
1297	/* check if scan was requested from mac80211 */
1298	if (il->scan_request) {
1299		D_SCAN("Complete scan in mac80211\n");
1300		ieee80211_scan_completed(il->hw, &info);
1301	}
1302
1303	il->scan_vif = NULL;
1304	il->scan_request = NULL;
1305}
1306
1307void
1308il_force_scan_end(struct il_priv *il)
1309{
1310	lockdep_assert_held(&il->mutex);
1311
1312	if (!test_bit(S_SCANNING, &il->status)) {
1313		D_SCAN("Forcing scan end while not scanning\n");
1314		return;
1315	}
1316
1317	D_SCAN("Forcing scan end\n");
1318	clear_bit(S_SCANNING, &il->status);
1319	clear_bit(S_SCAN_HW, &il->status);
1320	clear_bit(S_SCAN_ABORTING, &il->status);
1321	il_complete_scan(il, true);
1322}
1323
1324static void
1325il_do_scan_abort(struct il_priv *il)
1326{
1327	int ret;
1328
1329	lockdep_assert_held(&il->mutex);
1330
1331	if (!test_bit(S_SCANNING, &il->status)) {
1332		D_SCAN("Not performing scan to abort\n");
1333		return;
1334	}
1335
1336	if (test_and_set_bit(S_SCAN_ABORTING, &il->status)) {
1337		D_SCAN("Scan abort in progress\n");
1338		return;
1339	}
1340
1341	ret = il_send_scan_abort(il);
1342	if (ret) {
1343		D_SCAN("Send scan abort failed %d\n", ret);
1344		il_force_scan_end(il);
1345	} else
1346		D_SCAN("Successfully send scan abort\n");
1347}
1348
1349/*
1350 * il_scan_cancel - Cancel any currently executing HW scan
1351 */
1352int
1353il_scan_cancel(struct il_priv *il)
1354{
1355	D_SCAN("Queuing abort scan\n");
1356	queue_work(il->workqueue, &il->abort_scan);
1357	return 0;
1358}
1359EXPORT_SYMBOL(il_scan_cancel);
1360
1361/*
1362 * il_scan_cancel_timeout - Cancel any currently executing HW scan
1363 * @ms: amount of time to wait (in milliseconds) for scan to abort
1364 *
1365 */
1366int
1367il_scan_cancel_timeout(struct il_priv *il, unsigned long ms)
1368{
1369	unsigned long timeout = jiffies + msecs_to_jiffies(ms);
1370
1371	lockdep_assert_held(&il->mutex);
1372
1373	D_SCAN("Scan cancel timeout\n");
1374
1375	il_do_scan_abort(il);
1376
1377	while (time_before_eq(jiffies, timeout)) {
1378		if (!test_bit(S_SCAN_HW, &il->status))
1379			break;
1380		msleep(20);
1381	}
1382
1383	return test_bit(S_SCAN_HW, &il->status);
1384}
1385EXPORT_SYMBOL(il_scan_cancel_timeout);
1386
1387/* Service response to C_SCAN (0x80) */
1388static void
1389il_hdl_scan(struct il_priv *il, struct il_rx_buf *rxb)
1390{
1391#ifdef CONFIG_IWLEGACY_DEBUG
1392	struct il_rx_pkt *pkt = rxb_addr(rxb);
1393	struct il_scanreq_notification *notif =
1394	    (struct il_scanreq_notification *)pkt->u.raw;
1395
1396	D_SCAN("Scan request status = 0x%x\n", notif->status);
1397#endif
1398}
1399
1400/* Service N_SCAN_START (0x82) */
1401static void
1402il_hdl_scan_start(struct il_priv *il, struct il_rx_buf *rxb)
1403{
1404	struct il_rx_pkt *pkt = rxb_addr(rxb);
1405	struct il_scanstart_notification *notif =
1406	    (struct il_scanstart_notification *)pkt->u.raw;
1407	il->scan_start_tsf = le32_to_cpu(notif->tsf_low);
1408	D_SCAN("Scan start: " "%d [802.11%s] "
1409	       "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n", notif->channel,
1410	       notif->band ? "bg" : "a", le32_to_cpu(notif->tsf_high),
1411	       le32_to_cpu(notif->tsf_low), notif->status, notif->beacon_timer);
1412}
1413
1414/* Service N_SCAN_RESULTS (0x83) */
1415static void
1416il_hdl_scan_results(struct il_priv *il, struct il_rx_buf *rxb)
1417{
1418#ifdef CONFIG_IWLEGACY_DEBUG
1419	struct il_rx_pkt *pkt = rxb_addr(rxb);
1420	struct il_scanresults_notification *notif =
1421	    (struct il_scanresults_notification *)pkt->u.raw;
1422
1423	D_SCAN("Scan ch.res: " "%d [802.11%s] " "(TSF: 0x%08X:%08X) - %d "
1424	       "elapsed=%lu usec\n", notif->channel, notif->band ? "bg" : "a",
1425	       le32_to_cpu(notif->tsf_high), le32_to_cpu(notif->tsf_low),
1426	       le32_to_cpu(notif->stats[0]),
1427	       le32_to_cpu(notif->tsf_low) - il->scan_start_tsf);
1428#endif
1429}
1430
1431/* Service N_SCAN_COMPLETE (0x84) */
1432static void
1433il_hdl_scan_complete(struct il_priv *il, struct il_rx_buf *rxb)
1434{
1435
 
1436	struct il_rx_pkt *pkt = rxb_addr(rxb);
1437	struct il_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
 
1438
1439	D_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
1440	       scan_notif->scanned_channels, scan_notif->tsf_low,
1441	       scan_notif->tsf_high, scan_notif->status);
1442
1443	/* The HW is no longer scanning */
1444	clear_bit(S_SCAN_HW, &il->status);
1445
1446	D_SCAN("Scan on %sGHz took %dms\n",
1447	       (il->scan_band == NL80211_BAND_2GHZ) ? "2.4" : "5.2",
1448	       jiffies_to_msecs(jiffies - il->scan_start));
1449
1450	queue_work(il->workqueue, &il->scan_completed);
1451}
1452
1453void
1454il_setup_rx_scan_handlers(struct il_priv *il)
1455{
1456	/* scan handlers */
1457	il->handlers[C_SCAN] = il_hdl_scan;
1458	il->handlers[N_SCAN_START] = il_hdl_scan_start;
1459	il->handlers[N_SCAN_RESULTS] = il_hdl_scan_results;
1460	il->handlers[N_SCAN_COMPLETE] = il_hdl_scan_complete;
1461}
1462EXPORT_SYMBOL(il_setup_rx_scan_handlers);
1463
1464u16
1465il_get_active_dwell_time(struct il_priv *il, enum nl80211_band band,
1466			 u8 n_probes)
1467{
1468	if (band == NL80211_BAND_5GHZ)
1469		return IL_ACTIVE_DWELL_TIME_52 +
1470		    IL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1);
1471	else
1472		return IL_ACTIVE_DWELL_TIME_24 +
1473		    IL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1);
1474}
1475EXPORT_SYMBOL(il_get_active_dwell_time);
1476
1477u16
1478il_get_passive_dwell_time(struct il_priv *il, enum nl80211_band band,
1479			  struct ieee80211_vif *vif)
1480{
1481	u16 value;
1482
1483	u16 passive =
1484	    (band ==
1485	     NL80211_BAND_2GHZ) ? IL_PASSIVE_DWELL_BASE +
1486	    IL_PASSIVE_DWELL_TIME_24 : IL_PASSIVE_DWELL_BASE +
1487	    IL_PASSIVE_DWELL_TIME_52;
1488
1489	if (il_is_any_associated(il)) {
1490		/*
1491		 * If we're associated, we clamp the maximum passive
1492		 * dwell time to be 98% of the smallest beacon interval
1493		 * (minus 2 * channel tune time)
1494		 */
1495		value = il->vif ? il->vif->bss_conf.beacon_int : 0;
1496		if (value > IL_PASSIVE_DWELL_BASE || !value)
1497			value = IL_PASSIVE_DWELL_BASE;
1498		value = (value * 98) / 100 - IL_CHANNEL_TUNE_TIME * 2;
1499		passive = min(value, passive);
1500	}
1501
1502	return passive;
1503}
1504EXPORT_SYMBOL(il_get_passive_dwell_time);
1505
1506void
1507il_init_scan_params(struct il_priv *il)
1508{
1509	u8 ant_idx = fls(il->hw_params.valid_tx_ant) - 1;
1510	if (!il->scan_tx_ant[NL80211_BAND_5GHZ])
1511		il->scan_tx_ant[NL80211_BAND_5GHZ] = ant_idx;
1512	if (!il->scan_tx_ant[NL80211_BAND_2GHZ])
1513		il->scan_tx_ant[NL80211_BAND_2GHZ] = ant_idx;
1514}
1515EXPORT_SYMBOL(il_init_scan_params);
1516
1517static int
1518il_scan_initiate(struct il_priv *il, struct ieee80211_vif *vif)
1519{
1520	int ret;
1521
1522	lockdep_assert_held(&il->mutex);
1523
1524	cancel_delayed_work(&il->scan_check);
1525
1526	if (!il_is_ready_rf(il)) {
1527		IL_WARN("Request scan called when driver not ready.\n");
1528		return -EIO;
1529	}
1530
1531	if (test_bit(S_SCAN_HW, &il->status)) {
1532		D_SCAN("Multiple concurrent scan requests in parallel.\n");
1533		return -EBUSY;
1534	}
1535
1536	if (test_bit(S_SCAN_ABORTING, &il->status)) {
1537		D_SCAN("Scan request while abort pending.\n");
1538		return -EBUSY;
1539	}
1540
1541	D_SCAN("Starting scan...\n");
1542
1543	set_bit(S_SCANNING, &il->status);
1544	il->scan_start = jiffies;
1545
1546	ret = il->ops->request_scan(il, vif);
1547	if (ret) {
1548		clear_bit(S_SCANNING, &il->status);
1549		return ret;
1550	}
1551
1552	queue_delayed_work(il->workqueue, &il->scan_check,
1553			   IL_SCAN_CHECK_WATCHDOG);
1554
1555	return 0;
1556}
1557
1558int
1559il_mac_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1560	       struct ieee80211_scan_request *hw_req)
1561{
1562	struct cfg80211_scan_request *req = &hw_req->req;
1563	struct il_priv *il = hw->priv;
1564	int ret;
1565
1566	if (req->n_channels == 0) {
1567		IL_ERR("Can not scan on no channels.\n");
1568		return -EINVAL;
1569	}
1570
1571	mutex_lock(&il->mutex);
1572	D_MAC80211("enter\n");
1573
1574	if (test_bit(S_SCANNING, &il->status)) {
1575		D_SCAN("Scan already in progress.\n");
1576		ret = -EAGAIN;
1577		goto out_unlock;
1578	}
1579
1580	/* mac80211 will only ask for one band at a time */
1581	il->scan_request = req;
1582	il->scan_vif = vif;
1583	il->scan_band = req->channels[0]->band;
1584
1585	ret = il_scan_initiate(il, vif);
1586
1587out_unlock:
1588	D_MAC80211("leave ret %d\n", ret);
1589	mutex_unlock(&il->mutex);
1590
1591	return ret;
1592}
1593EXPORT_SYMBOL(il_mac_hw_scan);
1594
1595static void
1596il_bg_scan_check(struct work_struct *data)
1597{
1598	struct il_priv *il =
1599	    container_of(data, struct il_priv, scan_check.work);
1600
1601	D_SCAN("Scan check work\n");
1602
1603	/* Since we are here firmware does not finish scan and
1604	 * most likely is in bad shape, so we don't bother to
1605	 * send abort command, just force scan complete to mac80211 */
1606	mutex_lock(&il->mutex);
1607	il_force_scan_end(il);
1608	mutex_unlock(&il->mutex);
1609}
1610
1611/*
1612 * il_fill_probe_req - fill in all required fields and IE for probe request
1613 */
 
1614u16
1615il_fill_probe_req(struct il_priv *il, struct ieee80211_mgmt *frame,
1616		  const u8 *ta, const u8 *ies, int ie_len, int left)
1617{
1618	int len = 0;
1619	u8 *pos = NULL;
1620
1621	/* Make sure there is enough space for the probe request,
1622	 * two mandatory IEs and the data */
1623	left -= 24;
1624	if (left < 0)
1625		return 0;
1626
1627	frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1628	eth_broadcast_addr(frame->da);
1629	memcpy(frame->sa, ta, ETH_ALEN);
1630	eth_broadcast_addr(frame->bssid);
1631	frame->seq_ctrl = 0;
1632
1633	len += 24;
1634
1635	/* ...next IE... */
1636	pos = &frame->u.probe_req.variable[0];
1637
1638	/* fill in our indirect SSID IE */
1639	left -= 2;
1640	if (left < 0)
1641		return 0;
1642	*pos++ = WLAN_EID_SSID;
1643	*pos++ = 0;
1644
1645	len += 2;
1646
1647	if (WARN_ON(left < ie_len))
1648		return len;
1649
1650	if (ies && ie_len) {
1651		memcpy(pos, ies, ie_len);
1652		len += ie_len;
1653	}
1654
1655	return (u16) len;
1656}
1657EXPORT_SYMBOL(il_fill_probe_req);
1658
1659static void
1660il_bg_abort_scan(struct work_struct *work)
1661{
1662	struct il_priv *il = container_of(work, struct il_priv, abort_scan);
1663
1664	D_SCAN("Abort scan work\n");
1665
1666	/* We keep scan_check work queued in case when firmware will not
1667	 * report back scan completed notification */
1668	mutex_lock(&il->mutex);
1669	il_scan_cancel_timeout(il, 200);
1670	mutex_unlock(&il->mutex);
1671}
1672
1673static void
1674il_bg_scan_completed(struct work_struct *work)
1675{
1676	struct il_priv *il = container_of(work, struct il_priv, scan_completed);
1677	bool aborted;
1678
1679	D_SCAN("Completed scan.\n");
1680
1681	cancel_delayed_work(&il->scan_check);
1682
1683	mutex_lock(&il->mutex);
1684
1685	aborted = test_and_clear_bit(S_SCAN_ABORTING, &il->status);
1686	if (aborted)
1687		D_SCAN("Aborted scan completed.\n");
1688
1689	if (!test_and_clear_bit(S_SCANNING, &il->status)) {
1690		D_SCAN("Scan already completed.\n");
1691		goto out_settings;
1692	}
1693
1694	il_complete_scan(il, aborted);
1695
1696out_settings:
1697	/* Can we still talk to firmware ? */
1698	if (!il_is_ready_rf(il))
1699		goto out;
1700
1701	/*
1702	 * We do not commit power settings while scan is pending,
1703	 * do it now if the settings changed.
1704	 */
1705	il_power_set_mode(il, &il->power_data.sleep_cmd_next, false);
1706	il_set_tx_power(il, il->tx_power_next, false);
1707
1708	il->ops->post_scan(il);
1709
1710out:
1711	mutex_unlock(&il->mutex);
1712}
1713
1714void
1715il_setup_scan_deferred_work(struct il_priv *il)
1716{
1717	INIT_WORK(&il->scan_completed, il_bg_scan_completed);
1718	INIT_WORK(&il->abort_scan, il_bg_abort_scan);
1719	INIT_DELAYED_WORK(&il->scan_check, il_bg_scan_check);
1720}
1721EXPORT_SYMBOL(il_setup_scan_deferred_work);
1722
1723void
1724il_cancel_scan_deferred_work(struct il_priv *il)
1725{
1726	cancel_work_sync(&il->abort_scan);
1727	cancel_work_sync(&il->scan_completed);
1728
1729	if (cancel_delayed_work_sync(&il->scan_check)) {
1730		mutex_lock(&il->mutex);
1731		il_force_scan_end(il);
1732		mutex_unlock(&il->mutex);
1733	}
1734}
1735EXPORT_SYMBOL(il_cancel_scan_deferred_work);
1736
1737/* il->sta_lock must be held */
1738static void
1739il_sta_ucode_activate(struct il_priv *il, u8 sta_id)
1740{
1741
1742	if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE))
1743		IL_ERR("ACTIVATE a non DRIVER active station id %u addr %pM\n",
1744		       sta_id, il->stations[sta_id].sta.sta.addr);
1745
1746	if (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) {
1747		D_ASSOC("STA id %u addr %pM already present"
1748			" in uCode (according to driver)\n", sta_id,
1749			il->stations[sta_id].sta.sta.addr);
1750	} else {
1751		il->stations[sta_id].used |= IL_STA_UCODE_ACTIVE;
1752		D_ASSOC("Added STA id %u addr %pM to uCode\n", sta_id,
1753			il->stations[sta_id].sta.sta.addr);
1754	}
1755}
1756
1757static int
1758il_process_add_sta_resp(struct il_priv *il, struct il_addsta_cmd *addsta,
1759			struct il_rx_pkt *pkt, bool sync)
1760{
1761	u8 sta_id = addsta->sta.sta_id;
1762	unsigned long flags;
1763	int ret = -EIO;
1764
1765	if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
1766		IL_ERR("Bad return from C_ADD_STA (0x%08X)\n", pkt->hdr.flags);
1767		return ret;
1768	}
1769
1770	D_INFO("Processing response for adding station %u\n", sta_id);
1771
1772	spin_lock_irqsave(&il->sta_lock, flags);
1773
1774	switch (pkt->u.add_sta.status) {
1775	case ADD_STA_SUCCESS_MSK:
1776		D_INFO("C_ADD_STA PASSED\n");
1777		il_sta_ucode_activate(il, sta_id);
1778		ret = 0;
1779		break;
1780	case ADD_STA_NO_ROOM_IN_TBL:
1781		IL_ERR("Adding station %d failed, no room in table.\n", sta_id);
1782		break;
1783	case ADD_STA_NO_BLOCK_ACK_RESOURCE:
1784		IL_ERR("Adding station %d failed, no block ack resource.\n",
1785		       sta_id);
1786		break;
1787	case ADD_STA_MODIFY_NON_EXIST_STA:
1788		IL_ERR("Attempting to modify non-existing station %d\n",
1789		       sta_id);
1790		break;
1791	default:
1792		D_ASSOC("Received C_ADD_STA:(0x%08X)\n", pkt->u.add_sta.status);
1793		break;
1794	}
1795
1796	D_INFO("%s station id %u addr %pM\n",
1797	       il->stations[sta_id].sta.mode ==
1798	       STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", sta_id,
1799	       il->stations[sta_id].sta.sta.addr);
1800
1801	/*
1802	 * XXX: The MAC address in the command buffer is often changed from
1803	 * the original sent to the device. That is, the MAC address
1804	 * written to the command buffer often is not the same MAC address
1805	 * read from the command buffer when the command returns. This
1806	 * issue has not yet been resolved and this debugging is left to
1807	 * observe the problem.
1808	 */
1809	D_INFO("%s station according to cmd buffer %pM\n",
1810	       il->stations[sta_id].sta.mode ==
1811	       STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", addsta->sta.addr);
1812	spin_unlock_irqrestore(&il->sta_lock, flags);
1813
1814	return ret;
1815}
1816
1817static void
1818il_add_sta_callback(struct il_priv *il, struct il_device_cmd *cmd,
1819		    struct il_rx_pkt *pkt)
1820{
1821	struct il_addsta_cmd *addsta = (struct il_addsta_cmd *)cmd->cmd.payload;
1822
1823	il_process_add_sta_resp(il, addsta, pkt, false);
1824
1825}
1826
1827int
1828il_send_add_sta(struct il_priv *il, struct il_addsta_cmd *sta, u8 flags)
1829{
1830	struct il_rx_pkt *pkt = NULL;
1831	int ret = 0;
1832	u8 data[sizeof(*sta)];
1833	struct il_host_cmd cmd = {
1834		.id = C_ADD_STA,
1835		.flags = flags,
1836		.data = data,
1837	};
1838	u8 sta_id __maybe_unused = sta->sta.sta_id;
1839
1840	D_INFO("Adding sta %u (%pM) %ssynchronously\n", sta_id, sta->sta.addr,
1841	       flags & CMD_ASYNC ? "a" : "");
1842
1843	if (flags & CMD_ASYNC)
1844		cmd.callback = il_add_sta_callback;
1845	else {
1846		cmd.flags |= CMD_WANT_SKB;
1847		might_sleep();
1848	}
1849
1850	cmd.len = il->ops->build_addsta_hcmd(sta, data);
1851	ret = il_send_cmd(il, &cmd);
1852	if (ret)
1853		return ret;
1854	if (flags & CMD_ASYNC)
1855		return 0;
1856
1857	pkt = (struct il_rx_pkt *)cmd.reply_page;
1858	ret = il_process_add_sta_resp(il, sta, pkt, true);
1859
1860	il_free_pages(il, cmd.reply_page);
1861
1862	return ret;
1863}
1864EXPORT_SYMBOL(il_send_add_sta);
1865
1866static void
1867il_set_ht_add_station(struct il_priv *il, u8 idx, struct ieee80211_sta *sta)
1868{
1869	struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->deflink.ht_cap;
1870	__le32 sta_flags;
1871
1872	if (!sta || !sta_ht_inf->ht_supported)
1873		goto done;
1874
1875	D_ASSOC("spatial multiplexing power save mode: %s\n",
1876		(sta->deflink.smps_mode == IEEE80211_SMPS_STATIC) ? "static" :
1877		(sta->deflink.smps_mode == IEEE80211_SMPS_DYNAMIC) ? "dynamic" :
1878		"disabled");
1879
1880	sta_flags = il->stations[idx].sta.station_flags;
1881
1882	sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
1883
1884	switch (sta->deflink.smps_mode) {
1885	case IEEE80211_SMPS_STATIC:
1886		sta_flags |= STA_FLG_MIMO_DIS_MSK;
1887		break;
1888	case IEEE80211_SMPS_DYNAMIC:
1889		sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
1890		break;
1891	case IEEE80211_SMPS_OFF:
1892		break;
1893	default:
1894		IL_WARN("Invalid MIMO PS mode %d\n", sta->deflink.smps_mode);
1895		break;
1896	}
1897
1898	sta_flags |=
1899	    cpu_to_le32((u32) sta_ht_inf->
1900			ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
1901
1902	sta_flags |=
1903	    cpu_to_le32((u32) sta_ht_inf->
1904			ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
1905
1906	if (il_is_ht40_tx_allowed(il, &sta->deflink.ht_cap))
1907		sta_flags |= STA_FLG_HT40_EN_MSK;
1908	else
1909		sta_flags &= ~STA_FLG_HT40_EN_MSK;
1910
1911	il->stations[idx].sta.station_flags = sta_flags;
1912done:
1913	return;
1914}
1915
1916/*
1917 * il_prep_station - Prepare station information for addition
1918 *
1919 * should be called with sta_lock held
1920 */
1921u8
1922il_prep_station(struct il_priv *il, const u8 *addr, bool is_ap,
1923		struct ieee80211_sta *sta)
1924{
1925	struct il_station_entry *station;
1926	int i;
1927	u8 sta_id = IL_INVALID_STATION;
1928	u16 rate;
1929
1930	if (is_ap)
1931		sta_id = IL_AP_ID;
1932	else if (is_broadcast_ether_addr(addr))
1933		sta_id = il->hw_params.bcast_id;
1934	else
1935		for (i = IL_STA_ID; i < il->hw_params.max_stations; i++) {
1936			if (ether_addr_equal(il->stations[i].sta.sta.addr,
1937					     addr)) {
1938				sta_id = i;
1939				break;
1940			}
1941
1942			if (!il->stations[i].used &&
1943			    sta_id == IL_INVALID_STATION)
1944				sta_id = i;
1945		}
1946
1947	/*
1948	 * These two conditions have the same outcome, but keep them
1949	 * separate
1950	 */
1951	if (unlikely(sta_id == IL_INVALID_STATION))
1952		return sta_id;
1953
1954	/*
1955	 * uCode is not able to deal with multiple requests to add a
1956	 * station. Keep track if one is in progress so that we do not send
1957	 * another.
1958	 */
1959	if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
1960		D_INFO("STA %d already in process of being added.\n", sta_id);
1961		return sta_id;
1962	}
1963
1964	if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
1965	    (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) &&
1966	    ether_addr_equal(il->stations[sta_id].sta.sta.addr, addr)) {
1967		D_ASSOC("STA %d (%pM) already added, not adding again.\n",
1968			sta_id, addr);
1969		return sta_id;
1970	}
1971
1972	station = &il->stations[sta_id];
1973	station->used = IL_STA_DRIVER_ACTIVE;
1974	D_ASSOC("Add STA to driver ID %d: %pM\n", sta_id, addr);
1975	il->num_stations++;
1976
1977	/* Set up the C_ADD_STA command to send to device */
1978	memset(&station->sta, 0, sizeof(struct il_addsta_cmd));
1979	memcpy(station->sta.sta.addr, addr, ETH_ALEN);
1980	station->sta.mode = 0;
1981	station->sta.sta.sta_id = sta_id;
1982	station->sta.station_flags = 0;
1983
1984	/*
1985	 * OK to call unconditionally, since local stations (IBSS BSSID
1986	 * STA and broadcast STA) pass in a NULL sta, and mac80211
1987	 * doesn't allow HT IBSS.
1988	 */
1989	il_set_ht_add_station(il, sta_id, sta);
1990
1991	/* 3945 only */
1992	rate = (il->band == NL80211_BAND_5GHZ) ? RATE_6M_PLCP : RATE_1M_PLCP;
1993	/* Turn on both antennas for the station... */
1994	station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
1995
1996	return sta_id;
1997
1998}
1999EXPORT_SYMBOL_GPL(il_prep_station);
2000
2001#define STA_WAIT_TIMEOUT (HZ/2)
2002
2003/*
2004 * il_add_station_common -
2005 */
2006int
2007il_add_station_common(struct il_priv *il, const u8 *addr, bool is_ap,
2008		      struct ieee80211_sta *sta, u8 *sta_id_r)
2009{
2010	unsigned long flags_spin;
2011	int ret = 0;
2012	u8 sta_id;
2013	struct il_addsta_cmd sta_cmd;
2014
2015	*sta_id_r = 0;
2016	spin_lock_irqsave(&il->sta_lock, flags_spin);
2017	sta_id = il_prep_station(il, addr, is_ap, sta);
2018	if (sta_id == IL_INVALID_STATION) {
2019		IL_ERR("Unable to prepare station %pM for addition\n", addr);
2020		spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2021		return -EINVAL;
2022	}
2023
2024	/*
2025	 * uCode is not able to deal with multiple requests to add a
2026	 * station. Keep track if one is in progress so that we do not send
2027	 * another.
2028	 */
2029	if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
2030		D_INFO("STA %d already in process of being added.\n", sta_id);
2031		spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2032		return -EEXIST;
2033	}
2034
2035	if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
2036	    (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2037		D_ASSOC("STA %d (%pM) already added, not adding again.\n",
2038			sta_id, addr);
2039		spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2040		return -EEXIST;
2041	}
2042
2043	il->stations[sta_id].used |= IL_STA_UCODE_INPROGRESS;
2044	memcpy(&sta_cmd, &il->stations[sta_id].sta,
2045	       sizeof(struct il_addsta_cmd));
2046	spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2047
2048	/* Add station to device's station table */
2049	ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2050	if (ret) {
2051		spin_lock_irqsave(&il->sta_lock, flags_spin);
2052		IL_ERR("Adding station %pM failed.\n",
2053		       il->stations[sta_id].sta.sta.addr);
2054		il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2055		il->stations[sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2056		spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2057	}
2058	*sta_id_r = sta_id;
2059	return ret;
2060}
2061EXPORT_SYMBOL(il_add_station_common);
2062
2063/*
2064 * il_sta_ucode_deactivate - deactivate ucode status for a station
2065 *
2066 * il->sta_lock must be held
2067 */
2068static void
2069il_sta_ucode_deactivate(struct il_priv *il, u8 sta_id)
2070{
2071	/* Ucode must be active and driver must be non active */
2072	if ((il->stations[sta_id].
2073	     used & (IL_STA_UCODE_ACTIVE | IL_STA_DRIVER_ACTIVE)) !=
2074	    IL_STA_UCODE_ACTIVE)
2075		IL_ERR("removed non active STA %u\n", sta_id);
2076
2077	il->stations[sta_id].used &= ~IL_STA_UCODE_ACTIVE;
2078
2079	memset(&il->stations[sta_id], 0, sizeof(struct il_station_entry));
2080	D_ASSOC("Removed STA %u\n", sta_id);
2081}
2082
2083static int
2084il_send_remove_station(struct il_priv *il, const u8 * addr, int sta_id,
2085		       bool temporary)
2086{
2087	struct il_rx_pkt *pkt;
2088	int ret;
2089
2090	unsigned long flags_spin;
2091	struct il_rem_sta_cmd rm_sta_cmd;
2092
2093	struct il_host_cmd cmd = {
2094		.id = C_REM_STA,
2095		.len = sizeof(struct il_rem_sta_cmd),
2096		.flags = CMD_SYNC,
2097		.data = &rm_sta_cmd,
2098	};
2099
2100	memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
2101	rm_sta_cmd.num_sta = 1;
2102	memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
2103
2104	cmd.flags |= CMD_WANT_SKB;
2105
2106	ret = il_send_cmd(il, &cmd);
2107
2108	if (ret)
2109		return ret;
2110
2111	pkt = (struct il_rx_pkt *)cmd.reply_page;
2112	if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
2113		IL_ERR("Bad return from C_REM_STA (0x%08X)\n", pkt->hdr.flags);
2114		ret = -EIO;
2115	}
2116
2117	if (!ret) {
2118		switch (pkt->u.rem_sta.status) {
2119		case REM_STA_SUCCESS_MSK:
2120			if (!temporary) {
2121				spin_lock_irqsave(&il->sta_lock, flags_spin);
2122				il_sta_ucode_deactivate(il, sta_id);
2123				spin_unlock_irqrestore(&il->sta_lock,
2124						       flags_spin);
2125			}
2126			D_ASSOC("C_REM_STA PASSED\n");
2127			break;
2128		default:
2129			ret = -EIO;
2130			IL_ERR("C_REM_STA failed\n");
2131			break;
2132		}
2133	}
2134	il_free_pages(il, cmd.reply_page);
2135
2136	return ret;
2137}
2138
2139/*
2140 * il_remove_station - Remove driver's knowledge of station.
2141 */
2142int
2143il_remove_station(struct il_priv *il, const u8 sta_id, const u8 * addr)
2144{
2145	unsigned long flags;
2146
2147	if (!il_is_ready(il)) {
2148		D_INFO("Unable to remove station %pM, device not ready.\n",
2149		       addr);
2150		/*
2151		 * It is typical for stations to be removed when we are
2152		 * going down. Return success since device will be down
2153		 * soon anyway
2154		 */
2155		return 0;
2156	}
2157
2158	D_ASSOC("Removing STA from driver:%d  %pM\n", sta_id, addr);
2159
2160	if (WARN_ON(sta_id == IL_INVALID_STATION))
2161		return -EINVAL;
2162
2163	spin_lock_irqsave(&il->sta_lock, flags);
2164
2165	if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2166		D_INFO("Removing %pM but non DRIVER active\n", addr);
2167		goto out_err;
2168	}
2169
2170	if (!(il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2171		D_INFO("Removing %pM but non UCODE active\n", addr);
2172		goto out_err;
2173	}
2174
2175	if (il->stations[sta_id].used & IL_STA_LOCAL) {
2176		kfree(il->stations[sta_id].lq);
2177		il->stations[sta_id].lq = NULL;
2178	}
2179
2180	il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2181
2182	il->num_stations--;
2183
2184	BUG_ON(il->num_stations < 0);
2185
2186	spin_unlock_irqrestore(&il->sta_lock, flags);
2187
2188	return il_send_remove_station(il, addr, sta_id, false);
2189out_err:
2190	spin_unlock_irqrestore(&il->sta_lock, flags);
2191	return -EINVAL;
2192}
2193EXPORT_SYMBOL_GPL(il_remove_station);
2194
2195/*
2196 * il_clear_ucode_stations - clear ucode station table bits
2197 *
2198 * This function clears all the bits in the driver indicating
2199 * which stations are active in the ucode. Call when something
2200 * other than explicit station management would cause this in
2201 * the ucode, e.g. unassociated RXON.
2202 */
2203void
2204il_clear_ucode_stations(struct il_priv *il)
2205{
2206	int i;
2207	unsigned long flags_spin;
2208	bool cleared = false;
2209
2210	D_INFO("Clearing ucode stations in driver\n");
2211
2212	spin_lock_irqsave(&il->sta_lock, flags_spin);
2213	for (i = 0; i < il->hw_params.max_stations; i++) {
2214		if (il->stations[i].used & IL_STA_UCODE_ACTIVE) {
2215			D_INFO("Clearing ucode active for station %d\n", i);
2216			il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2217			cleared = true;
2218		}
2219	}
2220	spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2221
2222	if (!cleared)
2223		D_INFO("No active stations found to be cleared\n");
2224}
2225EXPORT_SYMBOL(il_clear_ucode_stations);
2226
2227/*
2228 * il_restore_stations() - Restore driver known stations to device
2229 *
2230 * All stations considered active by driver, but not present in ucode, is
2231 * restored.
2232 *
2233 * Function sleeps.
2234 */
2235void
2236il_restore_stations(struct il_priv *il)
2237{
2238	struct il_addsta_cmd sta_cmd;
2239	struct il_link_quality_cmd lq;
2240	unsigned long flags_spin;
2241	int i;
2242	bool found = false;
2243	int ret;
2244	bool send_lq;
2245
2246	if (!il_is_ready(il)) {
2247		D_INFO("Not ready yet, not restoring any stations.\n");
2248		return;
2249	}
2250
2251	D_ASSOC("Restoring all known stations ... start.\n");
2252	spin_lock_irqsave(&il->sta_lock, flags_spin);
2253	for (i = 0; i < il->hw_params.max_stations; i++) {
2254		if ((il->stations[i].used & IL_STA_DRIVER_ACTIVE) &&
2255		    !(il->stations[i].used & IL_STA_UCODE_ACTIVE)) {
2256			D_ASSOC("Restoring sta %pM\n",
2257				il->stations[i].sta.sta.addr);
2258			il->stations[i].sta.mode = 0;
2259			il->stations[i].used |= IL_STA_UCODE_INPROGRESS;
2260			found = true;
2261		}
2262	}
2263
2264	for (i = 0; i < il->hw_params.max_stations; i++) {
2265		if ((il->stations[i].used & IL_STA_UCODE_INPROGRESS)) {
2266			memcpy(&sta_cmd, &il->stations[i].sta,
2267			       sizeof(struct il_addsta_cmd));
2268			send_lq = false;
2269			if (il->stations[i].lq) {
2270				memcpy(&lq, il->stations[i].lq,
2271				       sizeof(struct il_link_quality_cmd));
2272				send_lq = true;
2273			}
2274			spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2275			ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2276			if (ret) {
2277				spin_lock_irqsave(&il->sta_lock, flags_spin);
2278				IL_ERR("Adding station %pM failed.\n",
2279				       il->stations[i].sta.sta.addr);
2280				il->stations[i].used &= ~IL_STA_DRIVER_ACTIVE;
2281				il->stations[i].used &=
2282				    ~IL_STA_UCODE_INPROGRESS;
2283				spin_unlock_irqrestore(&il->sta_lock,
2284						       flags_spin);
2285			}
2286			/*
2287			 * Rate scaling has already been initialized, send
2288			 * current LQ command
2289			 */
2290			if (send_lq)
2291				il_send_lq_cmd(il, &lq, CMD_SYNC, true);
2292			spin_lock_irqsave(&il->sta_lock, flags_spin);
2293			il->stations[i].used &= ~IL_STA_UCODE_INPROGRESS;
2294		}
2295	}
2296
2297	spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2298	if (!found)
2299		D_INFO("Restoring all known stations"
2300		       " .... no stations to be restored.\n");
2301	else
2302		D_INFO("Restoring all known stations" " .... complete.\n");
2303}
2304EXPORT_SYMBOL(il_restore_stations);
2305
2306int
2307il_get_free_ucode_key_idx(struct il_priv *il)
2308{
2309	int i;
2310
2311	for (i = 0; i < il->sta_key_max_num; i++)
2312		if (!test_and_set_bit(i, &il->ucode_key_table))
2313			return i;
2314
2315	return WEP_INVALID_OFFSET;
2316}
2317EXPORT_SYMBOL(il_get_free_ucode_key_idx);
2318
2319void
2320il_dealloc_bcast_stations(struct il_priv *il)
2321{
2322	unsigned long flags;
2323	int i;
2324
2325	spin_lock_irqsave(&il->sta_lock, flags);
2326	for (i = 0; i < il->hw_params.max_stations; i++) {
2327		if (!(il->stations[i].used & IL_STA_BCAST))
2328			continue;
2329
2330		il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2331		il->num_stations--;
2332		BUG_ON(il->num_stations < 0);
2333		kfree(il->stations[i].lq);
2334		il->stations[i].lq = NULL;
2335	}
2336	spin_unlock_irqrestore(&il->sta_lock, flags);
2337}
2338EXPORT_SYMBOL_GPL(il_dealloc_bcast_stations);
2339
2340#ifdef CONFIG_IWLEGACY_DEBUG
2341static void
2342il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq)
2343{
2344	int i;
2345	D_RATE("lq station id 0x%x\n", lq->sta_id);
2346	D_RATE("lq ant 0x%X 0x%X\n", lq->general_params.single_stream_ant_msk,
2347	       lq->general_params.dual_stream_ant_msk);
2348
2349	for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
2350		D_RATE("lq idx %d 0x%X\n", i, lq->rs_table[i].rate_n_flags);
2351}
2352#else
2353static inline void
2354il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq)
2355{
2356}
2357#endif
2358
2359/*
2360 * il_is_lq_table_valid() - Test one aspect of LQ cmd for validity
2361 *
2362 * It sometimes happens when a HT rate has been in use and we
2363 * loose connectivity with AP then mac80211 will first tell us that the
2364 * current channel is not HT anymore before removing the station. In such a
2365 * scenario the RXON flags will be updated to indicate we are not
2366 * communicating HT anymore, but the LQ command may still contain HT rates.
2367 * Test for this to prevent driver from sending LQ command between the time
2368 * RXON flags are updated and when LQ command is updated.
2369 */
2370static bool
2371il_is_lq_table_valid(struct il_priv *il, struct il_link_quality_cmd *lq)
2372{
2373	int i;
2374
2375	if (il->ht.enabled)
2376		return true;
2377
2378	D_INFO("Channel %u is not an HT channel\n", il->active.channel);
2379	for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
2380		if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & RATE_MCS_HT_MSK) {
2381			D_INFO("idx %d of LQ expects HT channel\n", i);
2382			return false;
2383		}
2384	}
2385	return true;
2386}
2387
2388/*
2389 * il_send_lq_cmd() - Send link quality command
2390 * @init: This command is sent as part of station initialization right
2391 *        after station has been added.
2392 *
2393 * The link quality command is sent as the last step of station creation.
2394 * This is the special case in which init is set and we call a callback in
2395 * this case to clear the state indicating that station creation is in
2396 * progress.
2397 */
2398int
2399il_send_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq,
2400	       u8 flags, bool init)
2401{
2402	int ret = 0;
2403	unsigned long flags_spin;
2404
2405	struct il_host_cmd cmd = {
2406		.id = C_TX_LINK_QUALITY_CMD,
2407		.len = sizeof(struct il_link_quality_cmd),
2408		.flags = flags,
2409		.data = lq,
2410	};
2411
2412	if (WARN_ON(lq->sta_id == IL_INVALID_STATION))
2413		return -EINVAL;
2414
2415	spin_lock_irqsave(&il->sta_lock, flags_spin);
2416	if (!(il->stations[lq->sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2417		spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2418		return -EINVAL;
2419	}
2420	spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2421
2422	il_dump_lq_cmd(il, lq);
2423	BUG_ON(init && (cmd.flags & CMD_ASYNC));
2424
2425	if (il_is_lq_table_valid(il, lq))
2426		ret = il_send_cmd(il, &cmd);
2427	else
2428		ret = -EINVAL;
2429
2430	if (cmd.flags & CMD_ASYNC)
2431		return ret;
2432
2433	if (init) {
2434		D_INFO("init LQ command complete,"
2435		       " clearing sta addition status for sta %d\n",
2436		       lq->sta_id);
2437		spin_lock_irqsave(&il->sta_lock, flags_spin);
2438		il->stations[lq->sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2439		spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2440	}
2441	return ret;
2442}
2443EXPORT_SYMBOL(il_send_lq_cmd);
2444
2445int
2446il_mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2447		  struct ieee80211_sta *sta)
2448{
2449	struct il_priv *il = hw->priv;
2450	struct il_station_priv_common *sta_common = (void *)sta->drv_priv;
2451	int ret;
2452
2453	mutex_lock(&il->mutex);
2454	D_MAC80211("enter station %pM\n", sta->addr);
2455
2456	ret = il_remove_station(il, sta_common->sta_id, sta->addr);
2457	if (ret)
2458		IL_ERR("Error removing station %pM\n", sta->addr);
2459
2460	D_MAC80211("leave ret %d\n", ret);
2461	mutex_unlock(&il->mutex);
2462
2463	return ret;
2464}
2465EXPORT_SYMBOL(il_mac_sta_remove);
2466
2467/************************** RX-FUNCTIONS ****************************/
2468/*
2469 * Rx theory of operation
2470 *
2471 * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
2472 * each of which point to Receive Buffers to be filled by the NIC.  These get
2473 * used not only for Rx frames, but for any command response or notification
2474 * from the NIC.  The driver and NIC manage the Rx buffers by means
2475 * of idxes into the circular buffer.
2476 *
2477 * Rx Queue Indexes
2478 * The host/firmware share two idx registers for managing the Rx buffers.
2479 *
2480 * The READ idx maps to the first position that the firmware may be writing
2481 * to -- the driver can read up to (but not including) this position and get
2482 * good data.
2483 * The READ idx is managed by the firmware once the card is enabled.
2484 *
2485 * The WRITE idx maps to the last position the driver has read from -- the
2486 * position preceding WRITE is the last slot the firmware can place a packet.
2487 *
2488 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
2489 * WRITE = READ.
2490 *
2491 * During initialization, the host sets up the READ queue position to the first
2492 * IDX position, and WRITE to the last (READ - 1 wrapped)
2493 *
2494 * When the firmware places a packet in a buffer, it will advance the READ idx
2495 * and fire the RX interrupt.  The driver can then query the READ idx and
2496 * process as many packets as possible, moving the WRITE idx forward as it
2497 * resets the Rx queue buffers with new memory.
2498 *
2499 * The management in the driver is as follows:
2500 * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free.  When
2501 *   iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
2502 *   to replenish the iwl->rxq->rx_free.
2503 * + In il_rx_replenish (scheduled) if 'processed' != 'read' then the
2504 *   iwl->rxq is replenished and the READ IDX is updated (updating the
2505 *   'processed' and 'read' driver idxes as well)
2506 * + A received packet is processed and handed to the kernel network stack,
2507 *   detached from the iwl->rxq.  The driver 'processed' idx is updated.
2508 * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
2509 *   list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
2510 *   IDX is not incremented and iwl->status(RX_STALLED) is set.  If there
2511 *   were enough free buffers and RX_STALLED is set it is cleared.
2512 *
2513 *
2514 * Driver sequence:
2515 *
2516 * il_rx_queue_alloc()   Allocates rx_free
2517 * il_rx_replenish()     Replenishes rx_free list from rx_used, and calls
2518 *                            il_rx_queue_restock
2519 * il_rx_queue_restock() Moves available buffers from rx_free into Rx
2520 *                            queue, updates firmware pointers, and updates
2521 *                            the WRITE idx.  If insufficient rx_free buffers
2522 *                            are available, schedules il_rx_replenish
2523 *
2524 * -- enable interrupts --
2525 * ISR - il_rx()         Detach il_rx_bufs from pool up to the
2526 *                            READ IDX, detaching the SKB from the pool.
2527 *                            Moves the packet buffer from queue to rx_used.
2528 *                            Calls il_rx_queue_restock to refill any empty
2529 *                            slots.
2530 * ...
2531 *
2532 */
2533
2534/*
2535 * il_rx_queue_space - Return number of free slots available in queue.
2536 */
2537int
2538il_rx_queue_space(const struct il_rx_queue *q)
2539{
2540	int s = q->read - q->write;
2541	if (s <= 0)
2542		s += RX_QUEUE_SIZE;
2543	/* keep some buffer to not confuse full and empty queue */
2544	s -= 2;
2545	if (s < 0)
2546		s = 0;
2547	return s;
2548}
2549EXPORT_SYMBOL(il_rx_queue_space);
2550
2551/*
2552 * il_rx_queue_update_write_ptr - Update the write pointer for the RX queue
2553 */
2554void
2555il_rx_queue_update_write_ptr(struct il_priv *il, struct il_rx_queue *q)
2556{
2557	unsigned long flags;
2558	u32 rx_wrt_ptr_reg = il->hw_params.rx_wrt_ptr_reg;
2559	u32 reg;
2560
2561	spin_lock_irqsave(&q->lock, flags);
2562
2563	if (q->need_update == 0)
2564		goto exit_unlock;
2565
2566	/* If power-saving is in use, make sure device is awake */
2567	if (test_bit(S_POWER_PMI, &il->status)) {
2568		reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2569
2570		if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2571			D_INFO("Rx queue requesting wakeup," " GP1 = 0x%x\n",
2572			       reg);
2573			il_set_bit(il, CSR_GP_CNTRL,
2574				   CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2575			goto exit_unlock;
2576		}
2577
2578		q->write_actual = (q->write & ~0x7);
2579		il_wr(il, rx_wrt_ptr_reg, q->write_actual);
2580
2581		/* Else device is assumed to be awake */
2582	} else {
2583		/* Device expects a multiple of 8 */
2584		q->write_actual = (q->write & ~0x7);
2585		il_wr(il, rx_wrt_ptr_reg, q->write_actual);
2586	}
2587
2588	q->need_update = 0;
2589
2590exit_unlock:
2591	spin_unlock_irqrestore(&q->lock, flags);
2592}
2593EXPORT_SYMBOL(il_rx_queue_update_write_ptr);
2594
2595int
2596il_rx_queue_alloc(struct il_priv *il)
2597{
2598	struct il_rx_queue *rxq = &il->rxq;
2599	struct device *dev = &il->pci_dev->dev;
2600	int i;
2601
2602	spin_lock_init(&rxq->lock);
2603	INIT_LIST_HEAD(&rxq->rx_free);
2604	INIT_LIST_HEAD(&rxq->rx_used);
2605
2606	/* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
2607	rxq->bd = dma_alloc_coherent(dev, 4 * RX_QUEUE_SIZE, &rxq->bd_dma,
2608				     GFP_KERNEL);
2609	if (!rxq->bd)
2610		goto err_bd;
2611
2612	rxq->rb_stts = dma_alloc_coherent(dev, sizeof(struct il_rb_status),
2613					  &rxq->rb_stts_dma, GFP_KERNEL);
2614	if (!rxq->rb_stts)
2615		goto err_rb;
2616
2617	/* Fill the rx_used queue with _all_ of the Rx buffers */
2618	for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
2619		list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
2620
2621	/* Set us so that we have processed and used all buffers, but have
2622	 * not restocked the Rx queue with fresh buffers */
2623	rxq->read = rxq->write = 0;
2624	rxq->write_actual = 0;
2625	rxq->free_count = 0;
2626	rxq->need_update = 0;
2627	return 0;
2628
2629err_rb:
2630	dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
2631			  rxq->bd_dma);
2632err_bd:
2633	return -ENOMEM;
2634}
2635EXPORT_SYMBOL(il_rx_queue_alloc);
2636
2637void
2638il_hdl_spectrum_measurement(struct il_priv *il, struct il_rx_buf *rxb)
2639{
2640	struct il_rx_pkt *pkt = rxb_addr(rxb);
2641	struct il_spectrum_notification *report = &(pkt->u.spectrum_notif);
2642
2643	if (!report->state) {
2644		D_11H("Spectrum Measure Notification: Start\n");
2645		return;
2646	}
2647
2648	memcpy(&il->measure_report, report, sizeof(*report));
2649	il->measurement_status |= MEASUREMENT_READY;
2650}
2651EXPORT_SYMBOL(il_hdl_spectrum_measurement);
2652
2653/*
2654 * returns non-zero if packet should be dropped
2655 */
2656int
2657il_set_decrypted_flag(struct il_priv *il, struct ieee80211_hdr *hdr,
2658		      u32 decrypt_res, struct ieee80211_rx_status *stats)
2659{
2660	u16 fc = le16_to_cpu(hdr->frame_control);
2661
2662	/*
2663	 * All contexts have the same setting here due to it being
2664	 * a module parameter, so OK to check any context.
2665	 */
2666	if (il->active.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2667		return 0;
2668
2669	if (!(fc & IEEE80211_FCTL_PROTECTED))
2670		return 0;
2671
2672	D_RX("decrypt_res:0x%x\n", decrypt_res);
2673	switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2674	case RX_RES_STATUS_SEC_TYPE_TKIP:
2675		/* The uCode has got a bad phase 1 Key, pushes the packet.
2676		 * Decryption will be done in SW. */
2677		if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2678		    RX_RES_STATUS_BAD_KEY_TTAK)
2679			break;
2680		fallthrough;
2681
2682	case RX_RES_STATUS_SEC_TYPE_WEP:
2683		if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2684		    RX_RES_STATUS_BAD_ICV_MIC) {
2685			/* bad ICV, the packet is destroyed since the
2686			 * decryption is inplace, drop it */
2687			D_RX("Packet destroyed\n");
2688			return -1;
2689		}
2690		fallthrough;
2691	case RX_RES_STATUS_SEC_TYPE_CCMP:
2692		if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2693		    RX_RES_STATUS_DECRYPT_OK) {
2694			D_RX("hw decrypt successfully!!!\n");
2695			stats->flag |= RX_FLAG_DECRYPTED;
2696		}
2697		break;
2698
2699	default:
2700		break;
2701	}
2702	return 0;
2703}
2704EXPORT_SYMBOL(il_set_decrypted_flag);
2705
2706/*
2707 * il_txq_update_write_ptr - Send new write idx to hardware
2708 */
2709void
2710il_txq_update_write_ptr(struct il_priv *il, struct il_tx_queue *txq)
2711{
2712	u32 reg = 0;
2713	int txq_id = txq->q.id;
2714
2715	if (txq->need_update == 0)
2716		return;
2717
2718	/* if we're trying to save power */
2719	if (test_bit(S_POWER_PMI, &il->status)) {
2720		/* wake up nic if it's powered down ...
2721		 * uCode will wake up, and interrupt us again, so next
2722		 * time we'll skip this part. */
2723		reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2724
2725		if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2726			D_INFO("Tx queue %d requesting wakeup," " GP1 = 0x%x\n",
2727			       txq_id, reg);
2728			il_set_bit(il, CSR_GP_CNTRL,
2729				   CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2730			return;
2731		}
2732
2733		il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8));
2734
2735		/*
2736		 * else not in power-save mode,
2737		 * uCode will never sleep when we're
2738		 * trying to tx (during RFKILL, we're not trying to tx).
2739		 */
2740	} else
2741		_il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8));
2742	txq->need_update = 0;
2743}
2744EXPORT_SYMBOL(il_txq_update_write_ptr);
2745
2746/*
2747 * il_tx_queue_unmap -  Unmap any remaining DMA mappings and free skb's
2748 */
2749void
2750il_tx_queue_unmap(struct il_priv *il, int txq_id)
2751{
2752	struct il_tx_queue *txq = &il->txq[txq_id];
2753	struct il_queue *q = &txq->q;
2754
2755	if (q->n_bd == 0)
2756		return;
2757
2758	while (q->write_ptr != q->read_ptr) {
2759		il->ops->txq_free_tfd(il, txq);
2760		q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2761	}
2762}
2763EXPORT_SYMBOL(il_tx_queue_unmap);
2764
2765/*
2766 * il_tx_queue_free - Deallocate DMA queue.
2767 * @txq: Transmit queue to deallocate.
2768 *
2769 * Empty queue by removing and destroying all BD's.
2770 * Free all buffers.
2771 * 0-fill, but do not free "txq" descriptor structure.
2772 */
2773void
2774il_tx_queue_free(struct il_priv *il, int txq_id)
2775{
2776	struct il_tx_queue *txq = &il->txq[txq_id];
2777	struct device *dev = &il->pci_dev->dev;
2778	int i;
2779
2780	il_tx_queue_unmap(il, txq_id);
2781
2782	/* De-alloc array of command/tx buffers */
2783	if (txq->cmd) {
2784		for (i = 0; i < TFD_TX_CMD_SLOTS; i++)
2785			kfree(txq->cmd[i]);
2786	}
2787
2788	/* De-alloc circular buffer of TFDs */
2789	if (txq->q.n_bd)
2790		dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2791				  txq->tfds, txq->q.dma_addr);
2792
2793	/* De-alloc array of per-TFD driver data */
2794	kfree(txq->skbs);
2795	txq->skbs = NULL;
2796
2797	/* deallocate arrays */
2798	kfree(txq->cmd);
2799	kfree(txq->meta);
2800	txq->cmd = NULL;
2801	txq->meta = NULL;
2802
2803	/* 0-fill queue descriptor structure */
2804	memset(txq, 0, sizeof(*txq));
2805}
2806EXPORT_SYMBOL(il_tx_queue_free);
2807
2808/*
2809 * il_cmd_queue_unmap - Unmap any remaining DMA mappings from command queue
2810 */
2811void
2812il_cmd_queue_unmap(struct il_priv *il)
2813{
2814	struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2815	struct il_queue *q = &txq->q;
2816	int i;
2817
2818	if (q->n_bd == 0)
2819		return;
2820
2821	while (q->read_ptr != q->write_ptr) {
2822		i = il_get_cmd_idx(q, q->read_ptr, 0);
2823
2824		if (txq->meta[i].flags & CMD_MAPPED) {
2825			dma_unmap_single(&il->pci_dev->dev,
2826					 dma_unmap_addr(&txq->meta[i], mapping),
2827					 dma_unmap_len(&txq->meta[i], len),
2828					 DMA_BIDIRECTIONAL);
2829			txq->meta[i].flags = 0;
2830		}
2831
2832		q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2833	}
2834
2835	i = q->n_win;
2836	if (txq->meta[i].flags & CMD_MAPPED) {
2837		dma_unmap_single(&il->pci_dev->dev,
2838				 dma_unmap_addr(&txq->meta[i], mapping),
2839				 dma_unmap_len(&txq->meta[i], len),
2840				 DMA_BIDIRECTIONAL);
2841		txq->meta[i].flags = 0;
2842	}
2843}
2844EXPORT_SYMBOL(il_cmd_queue_unmap);
2845
2846/*
2847 * il_cmd_queue_free - Deallocate DMA queue.
 
2848 *
2849 * Empty queue by removing and destroying all BD's.
2850 * Free all buffers.
2851 * 0-fill, but do not free "txq" descriptor structure.
2852 */
2853void
2854il_cmd_queue_free(struct il_priv *il)
2855{
2856	struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2857	struct device *dev = &il->pci_dev->dev;
2858	int i;
2859
2860	il_cmd_queue_unmap(il);
2861
2862	/* De-alloc array of command/tx buffers */
2863	if (txq->cmd) {
2864		for (i = 0; i <= TFD_CMD_SLOTS; i++)
2865			kfree(txq->cmd[i]);
2866	}
2867
2868	/* De-alloc circular buffer of TFDs */
2869	if (txq->q.n_bd)
2870		dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2871				  txq->tfds, txq->q.dma_addr);
2872
2873	/* deallocate arrays */
2874	kfree(txq->cmd);
2875	kfree(txq->meta);
2876	txq->cmd = NULL;
2877	txq->meta = NULL;
2878
2879	/* 0-fill queue descriptor structure */
2880	memset(txq, 0, sizeof(*txq));
2881}
2882EXPORT_SYMBOL(il_cmd_queue_free);
2883
2884/*************** DMA-QUEUE-GENERAL-FUNCTIONS  *****
2885 * DMA services
2886 *
2887 * Theory of operation
2888 *
2889 * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
2890 * of buffer descriptors, each of which points to one or more data buffers for
2891 * the device to read from or fill.  Driver and device exchange status of each
2892 * queue via "read" and "write" pointers.  Driver keeps minimum of 2 empty
2893 * entries in each circular buffer, to protect against confusing empty and full
2894 * queue states.
2895 *
2896 * The device reads or writes the data in the queues via the device's several
2897 * DMA/FIFO channels.  Each queue is mapped to a single DMA channel.
2898 *
2899 * For Tx queue, there are low mark and high mark limits. If, after queuing
2900 * the packet for Tx, free space become < low mark, Tx queue stopped. When
2901 * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
2902 * Tx queue resumed.
2903 *
2904 * See more detailed info in 4965.h.
2905 ***************************************************/
2906
2907int
2908il_queue_space(const struct il_queue *q)
2909{
2910	int s = q->read_ptr - q->write_ptr;
2911
2912	if (q->read_ptr > q->write_ptr)
2913		s -= q->n_bd;
2914
2915	if (s <= 0)
2916		s += q->n_win;
2917	/* keep some reserve to not confuse empty and full situations */
2918	s -= 2;
2919	if (s < 0)
2920		s = 0;
2921	return s;
2922}
2923EXPORT_SYMBOL(il_queue_space);
2924
2925
2926/*
2927 * il_queue_init - Initialize queue's high/low-water and read/write idxes
2928 */
2929static int
2930il_queue_init(struct il_priv *il, struct il_queue *q, int slots, u32 id)
2931{
2932	/*
2933	 * TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
2934	 * il_queue_inc_wrap and il_queue_dec_wrap are broken.
2935	 */
2936	BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
2937	/* FIXME: remove q->n_bd */
2938	q->n_bd = TFD_QUEUE_SIZE_MAX;
2939
2940	q->n_win = slots;
2941	q->id = id;
2942
2943	/* slots_must be power-of-two size, otherwise
2944	 * il_get_cmd_idx is broken. */
2945	BUG_ON(!is_power_of_2(slots));
2946
2947	q->low_mark = q->n_win / 4;
2948	if (q->low_mark < 4)
2949		q->low_mark = 4;
2950
2951	q->high_mark = q->n_win / 8;
2952	if (q->high_mark < 2)
2953		q->high_mark = 2;
2954
2955	q->write_ptr = q->read_ptr = 0;
2956
2957	return 0;
2958}
2959
2960/*
2961 * il_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
2962 */
2963static int
2964il_tx_queue_alloc(struct il_priv *il, struct il_tx_queue *txq, u32 id)
2965{
2966	struct device *dev = &il->pci_dev->dev;
2967	size_t tfd_sz = il->hw_params.tfd_size * TFD_QUEUE_SIZE_MAX;
2968
2969	/* Driver ilate data, only for Tx (not command) queues,
2970	 * not shared with device. */
2971	if (id != il->cmd_queue) {
2972		txq->skbs = kcalloc(TFD_QUEUE_SIZE_MAX,
2973				    sizeof(struct sk_buff *),
2974				    GFP_KERNEL);
2975		if (!txq->skbs) {
2976			IL_ERR("Fail to alloc skbs\n");
2977			goto error;
2978		}
2979	} else
2980		txq->skbs = NULL;
2981
2982	/* Circular buffer of transmit frame descriptors (TFDs),
2983	 * shared with device */
2984	txq->tfds =
2985	    dma_alloc_coherent(dev, tfd_sz, &txq->q.dma_addr, GFP_KERNEL);
2986	if (!txq->tfds)
2987		goto error;
2988
2989	txq->q.id = id;
2990
2991	return 0;
2992
2993error:
2994	kfree(txq->skbs);
2995	txq->skbs = NULL;
2996
2997	return -ENOMEM;
2998}
2999
3000/*
3001 * il_tx_queue_init - Allocate and initialize one tx/cmd queue
3002 */
3003int
3004il_tx_queue_init(struct il_priv *il, u32 txq_id)
3005{
3006	int i, len, ret;
3007	int slots, actual_slots;
3008	struct il_tx_queue *txq = &il->txq[txq_id];
3009
3010	/*
3011	 * Alloc buffer array for commands (Tx or other types of commands).
3012	 * For the command queue (#4/#9), allocate command space + one big
3013	 * command for scan, since scan command is very huge; the system will
3014	 * not have two scans at the same time, so only one is needed.
3015	 * For normal Tx queues (all other queues), no super-size command
3016	 * space is needed.
3017	 */
3018	if (txq_id == il->cmd_queue) {
3019		slots = TFD_CMD_SLOTS;
3020		actual_slots = slots + 1;
3021	} else {
3022		slots = TFD_TX_CMD_SLOTS;
3023		actual_slots = slots;
3024	}
3025
3026	txq->meta =
3027	    kcalloc(actual_slots, sizeof(struct il_cmd_meta), GFP_KERNEL);
3028	txq->cmd =
3029	    kcalloc(actual_slots, sizeof(struct il_device_cmd *), GFP_KERNEL);
3030
3031	if (!txq->meta || !txq->cmd)
3032		goto out_free_arrays;
3033
3034	len = sizeof(struct il_device_cmd);
3035	for (i = 0; i < actual_slots; i++) {
3036		/* only happens for cmd queue */
3037		if (i == slots)
3038			len = IL_MAX_CMD_SIZE;
3039
3040		txq->cmd[i] = kmalloc(len, GFP_KERNEL);
3041		if (!txq->cmd[i])
3042			goto err;
3043	}
3044
3045	/* Alloc driver data array and TFD circular buffer */
3046	ret = il_tx_queue_alloc(il, txq, txq_id);
3047	if (ret)
3048		goto err;
3049
3050	txq->need_update = 0;
3051
3052	/*
3053	 * For the default queues 0-3, set up the swq_id
3054	 * already -- all others need to get one later
3055	 * (if they need one at all).
3056	 */
3057	if (txq_id < 4)
3058		il_set_swq_id(txq, txq_id, txq_id);
3059
3060	/* Initialize queue's high/low-water marks, and head/tail idxes */
3061	il_queue_init(il, &txq->q, slots, txq_id);
3062
3063	/* Tell device where to find queue */
3064	il->ops->txq_init(il, txq);
3065
3066	return 0;
3067err:
3068	for (i = 0; i < actual_slots; i++)
3069		kfree(txq->cmd[i]);
3070out_free_arrays:
3071	kfree(txq->meta);
3072	txq->meta = NULL;
3073	kfree(txq->cmd);
3074	txq->cmd = NULL;
3075
3076	return -ENOMEM;
3077}
3078EXPORT_SYMBOL(il_tx_queue_init);
3079
3080void
3081il_tx_queue_reset(struct il_priv *il, u32 txq_id)
3082{
3083	int slots, actual_slots;
3084	struct il_tx_queue *txq = &il->txq[txq_id];
3085
3086	if (txq_id == il->cmd_queue) {
3087		slots = TFD_CMD_SLOTS;
3088		actual_slots = TFD_CMD_SLOTS + 1;
3089	} else {
3090		slots = TFD_TX_CMD_SLOTS;
3091		actual_slots = TFD_TX_CMD_SLOTS;
3092	}
3093
3094	memset(txq->meta, 0, sizeof(struct il_cmd_meta) * actual_slots);
3095	txq->need_update = 0;
3096
3097	/* Initialize queue's high/low-water marks, and head/tail idxes */
3098	il_queue_init(il, &txq->q, slots, txq_id);
3099
3100	/* Tell device where to find queue */
3101	il->ops->txq_init(il, txq);
3102}
3103EXPORT_SYMBOL(il_tx_queue_reset);
3104
3105/*************** HOST COMMAND QUEUE FUNCTIONS   *****/
3106
3107/*
3108 * il_enqueue_hcmd - enqueue a uCode command
3109 * @il: device ilate data point
3110 * @cmd: a point to the ucode command structure
3111 *
3112 * The function returns < 0 values to indicate the operation is
3113 * failed. On success, it turns the idx (> 0) of command in the
3114 * command queue.
3115 */
3116int
3117il_enqueue_hcmd(struct il_priv *il, struct il_host_cmd *cmd)
3118{
3119	struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3120	struct il_queue *q = &txq->q;
3121	struct il_device_cmd *out_cmd;
3122	struct il_cmd_meta *out_meta;
3123	dma_addr_t phys_addr;
3124	unsigned long flags;
 
3125	u32 idx;
3126	u16 fix_size;
3127
3128	cmd->len = il->ops->get_hcmd_size(cmd->id, cmd->len);
3129	fix_size = (u16) (cmd->len + sizeof(out_cmd->hdr));
3130
3131	/* If any of the command structures end up being larger than
3132	 * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
3133	 * we will need to increase the size of the TFD entries
3134	 * Also, check to see if command buffer should not exceed the size
3135	 * of device_cmd and max_cmd_size. */
3136	BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
3137	       !(cmd->flags & CMD_SIZE_HUGE));
3138	BUG_ON(fix_size > IL_MAX_CMD_SIZE);
3139
3140	if (il_is_rfkill(il) || il_is_ctkill(il)) {
3141		IL_WARN("Not sending command - %s KILL\n",
3142			il_is_rfkill(il) ? "RF" : "CT");
3143		return -EIO;
3144	}
3145
3146	spin_lock_irqsave(&il->hcmd_lock, flags);
3147
3148	if (il_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) {
3149		spin_unlock_irqrestore(&il->hcmd_lock, flags);
3150
3151		IL_ERR("Restarting adapter due to command queue full\n");
3152		queue_work(il->workqueue, &il->restart);
3153		return -ENOSPC;
3154	}
3155
3156	idx = il_get_cmd_idx(q, q->write_ptr, cmd->flags & CMD_SIZE_HUGE);
3157	out_cmd = txq->cmd[idx];
3158	out_meta = &txq->meta[idx];
3159
3160	if (WARN_ON(out_meta->flags & CMD_MAPPED)) {
3161		spin_unlock_irqrestore(&il->hcmd_lock, flags);
3162		return -ENOSPC;
3163	}
3164
3165	memset(out_meta, 0, sizeof(*out_meta));	/* re-initialize to NULL */
3166	out_meta->flags = cmd->flags | CMD_MAPPED;
3167	if (cmd->flags & CMD_WANT_SKB)
3168		out_meta->source = cmd;
3169	if (cmd->flags & CMD_ASYNC)
3170		out_meta->callback = cmd->callback;
3171
3172	out_cmd->hdr.cmd = cmd->id;
3173	memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
3174
3175	/* At this point, the out_cmd now has all of the incoming cmd
3176	 * information */
3177
3178	out_cmd->hdr.flags = 0;
3179	out_cmd->hdr.sequence =
3180	    cpu_to_le16(QUEUE_TO_SEQ(il->cmd_queue) | IDX_TO_SEQ(q->write_ptr));
3181	if (cmd->flags & CMD_SIZE_HUGE)
3182		out_cmd->hdr.sequence |= SEQ_HUGE_FRAME;
 
 
 
3183
3184#ifdef CONFIG_IWLEGACY_DEBUG
3185	switch (out_cmd->hdr.cmd) {
3186	case C_TX_LINK_QUALITY_CMD:
3187	case C_SENSITIVITY:
3188		D_HC_DUMP("Sending command %s (#%x), seq: 0x%04X, "
3189			  "%d bytes at %d[%d]:%d\n",
3190			  il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3191			  le16_to_cpu(out_cmd->hdr.sequence), fix_size,
3192			  q->write_ptr, idx, il->cmd_queue);
3193		break;
3194	default:
3195		D_HC("Sending command %s (#%x), seq: 0x%04X, "
3196		     "%d bytes at %d[%d]:%d\n",
3197		     il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3198		     le16_to_cpu(out_cmd->hdr.sequence), fix_size, q->write_ptr,
3199		     idx, il->cmd_queue);
3200	}
3201#endif
3202
3203	phys_addr = dma_map_single(&il->pci_dev->dev, &out_cmd->hdr, fix_size,
3204				   DMA_BIDIRECTIONAL);
3205	if (unlikely(dma_mapping_error(&il->pci_dev->dev, phys_addr))) {
 
3206		idx = -ENOMEM;
3207		goto out;
3208	}
3209	dma_unmap_addr_set(out_meta, mapping, phys_addr);
3210	dma_unmap_len_set(out_meta, len, fix_size);
3211
3212	txq->need_update = 1;
3213
3214	if (il->ops->txq_update_byte_cnt_tbl)
3215		/* Set up entry in queue's byte count circular buffer */
3216		il->ops->txq_update_byte_cnt_tbl(il, txq, 0);
3217
3218	il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, fix_size, 1,
3219					    U32_PAD(cmd->len));
3220
3221	/* Increment and update queue's write idx */
3222	q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
3223	il_txq_update_write_ptr(il, txq);
3224
3225out:
3226	spin_unlock_irqrestore(&il->hcmd_lock, flags);
3227	return idx;
3228}
3229
3230/*
3231 * il_hcmd_queue_reclaim - Reclaim TX command queue entries already Tx'd
3232 *
3233 * When FW advances 'R' idx, all entries between old and new 'R' idx
3234 * need to be reclaimed. As result, some free space forms.  If there is
3235 * enough free space (> low mark), wake the stack that feeds us.
3236 */
3237static void
3238il_hcmd_queue_reclaim(struct il_priv *il, int txq_id, int idx, int cmd_idx)
3239{
3240	struct il_tx_queue *txq = &il->txq[txq_id];
3241	struct il_queue *q = &txq->q;
3242	int nfreed = 0;
3243
3244	if (idx >= q->n_bd || il_queue_used(q, idx) == 0) {
3245		IL_ERR("Read idx for DMA queue txq id (%d), idx %d, "
3246		       "is out of range [0-%d] %d %d.\n", txq_id, idx, q->n_bd,
3247		       q->write_ptr, q->read_ptr);
3248		return;
3249	}
3250
3251	for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx;
3252	     q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3253
3254		if (nfreed++ > 0) {
3255			IL_ERR("HCMD skipped: idx (%d) %d %d\n", idx,
3256			       q->write_ptr, q->read_ptr);
3257			queue_work(il->workqueue, &il->restart);
3258		}
3259
3260	}
3261}
3262
3263/*
3264 * il_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3265 * @rxb: Rx buffer to reclaim
3266 *
3267 * If an Rx buffer has an async callback associated with it the callback
3268 * will be executed.  The attached skb (if present) will only be freed
3269 * if the callback returns 1
3270 */
3271void
3272il_tx_cmd_complete(struct il_priv *il, struct il_rx_buf *rxb)
3273{
3274	struct il_rx_pkt *pkt = rxb_addr(rxb);
3275	u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3276	int txq_id = SEQ_TO_QUEUE(sequence);
3277	int idx = SEQ_TO_IDX(sequence);
3278	int cmd_idx;
3279	bool huge = !!(pkt->hdr.sequence & SEQ_HUGE_FRAME);
3280	struct il_device_cmd *cmd;
3281	struct il_cmd_meta *meta;
3282	struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3283	unsigned long flags;
3284
3285	/* If a Tx command is being handled and it isn't in the actual
3286	 * command queue then there a command routing bug has been introduced
3287	 * in the queue management code. */
3288	if (WARN
3289	    (txq_id != il->cmd_queue,
3290	     "wrong command queue %d (should be %d), sequence 0x%X readp=%d writep=%d\n",
3291	     txq_id, il->cmd_queue, sequence, il->txq[il->cmd_queue].q.read_ptr,
3292	     il->txq[il->cmd_queue].q.write_ptr)) {
3293		il_print_hex_error(il, pkt, 32);
3294		return;
3295	}
3296
3297	cmd_idx = il_get_cmd_idx(&txq->q, idx, huge);
3298	cmd = txq->cmd[cmd_idx];
3299	meta = &txq->meta[cmd_idx];
3300
3301	txq->time_stamp = jiffies;
3302
3303	dma_unmap_single(&il->pci_dev->dev, dma_unmap_addr(meta, mapping),
3304			 dma_unmap_len(meta, len), DMA_BIDIRECTIONAL);
3305
3306	/* Input error checking is done when commands are added to queue. */
3307	if (meta->flags & CMD_WANT_SKB) {
3308		meta->source->reply_page = (unsigned long)rxb_addr(rxb);
3309		rxb->page = NULL;
3310	} else if (meta->callback)
3311		meta->callback(il, cmd, pkt);
3312
3313	spin_lock_irqsave(&il->hcmd_lock, flags);
3314
3315	il_hcmd_queue_reclaim(il, txq_id, idx, cmd_idx);
3316
3317	if (!(meta->flags & CMD_ASYNC)) {
3318		clear_bit(S_HCMD_ACTIVE, &il->status);
3319		D_INFO("Clearing HCMD_ACTIVE for command %s\n",
3320		       il_get_cmd_string(cmd->hdr.cmd));
3321		wake_up(&il->wait_command_queue);
3322	}
3323
3324	/* Mark as unmapped */
3325	meta->flags = 0;
3326
3327	spin_unlock_irqrestore(&il->hcmd_lock, flags);
3328}
3329EXPORT_SYMBOL(il_tx_cmd_complete);
3330
3331MODULE_DESCRIPTION("iwl-legacy: common functions for 3945 and 4965");
3332MODULE_VERSION(IWLWIFI_VERSION);
3333MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
3334MODULE_LICENSE("GPL");
3335
3336/*
3337 * set bt_coex_active to true, uCode will do kill/defer
3338 * every time the priority line is asserted (BT is sending signals on the
3339 * priority line in the PCIx).
3340 * set bt_coex_active to false, uCode will ignore the BT activity and
3341 * perform the normal operation
3342 *
3343 * User might experience transmit issue on some platform due to WiFi/BT
3344 * co-exist problem. The possible behaviors are:
3345 *   Able to scan and finding all the available AP
3346 *   Not able to associate with any AP
3347 * On those platforms, WiFi communication can be restored by set
3348 * "bt_coex_active" module parameter to "false"
3349 *
3350 * default: bt_coex_active = true (BT_COEX_ENABLE)
3351 */
3352static bool bt_coex_active = true;
3353module_param(bt_coex_active, bool, 0444);
3354MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
3355
3356u32 il_debug_level;
3357EXPORT_SYMBOL(il_debug_level);
3358
3359const u8 il_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
3360EXPORT_SYMBOL(il_bcast_addr);
3361
3362#define MAX_BIT_RATE_40_MHZ 150	/* Mbps */
3363#define MAX_BIT_RATE_20_MHZ 72	/* Mbps */
3364static void
3365il_init_ht_hw_capab(const struct il_priv *il,
3366		    struct ieee80211_sta_ht_cap *ht_info,
3367		    enum nl80211_band band)
3368{
3369	u16 max_bit_rate = 0;
3370	u8 rx_chains_num = il->hw_params.rx_chains_num;
3371	u8 tx_chains_num = il->hw_params.tx_chains_num;
3372
3373	ht_info->cap = 0;
3374	memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
3375
3376	ht_info->ht_supported = true;
3377
3378	ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
3379	max_bit_rate = MAX_BIT_RATE_20_MHZ;
3380	if (il->hw_params.ht40_channel & BIT(band)) {
3381		ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
3382		ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
3383		ht_info->mcs.rx_mask[4] = 0x01;
3384		max_bit_rate = MAX_BIT_RATE_40_MHZ;
3385	}
3386
3387	if (il->cfg->mod_params->amsdu_size_8K)
3388		ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
3389
3390	ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3391	ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3392
3393	ht_info->mcs.rx_mask[0] = 0xFF;
3394	if (rx_chains_num >= 2)
3395		ht_info->mcs.rx_mask[1] = 0xFF;
3396	if (rx_chains_num >= 3)
3397		ht_info->mcs.rx_mask[2] = 0xFF;
3398
3399	/* Highest supported Rx data rate */
3400	max_bit_rate *= rx_chains_num;
3401	WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
3402	ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
3403
3404	/* Tx MCS capabilities */
3405	ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
3406	if (tx_chains_num != rx_chains_num) {
3407		ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
3408		ht_info->mcs.tx_params |=
3409		    ((tx_chains_num -
3410		      1) << IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
3411	}
3412}
3413
3414/*
3415 * il_init_geos - Initialize mac80211's geo/channel info based from eeprom
3416 */
3417int
3418il_init_geos(struct il_priv *il)
3419{
3420	struct il_channel_info *ch;
3421	struct ieee80211_supported_band *sband;
3422	struct ieee80211_channel *channels;
3423	struct ieee80211_channel *geo_ch;
3424	struct ieee80211_rate *rates;
3425	int i = 0;
3426	s8 max_tx_power = 0;
3427
3428	if (il->bands[NL80211_BAND_2GHZ].n_bitrates ||
3429	    il->bands[NL80211_BAND_5GHZ].n_bitrates) {
3430		D_INFO("Geography modes already initialized.\n");
3431		set_bit(S_GEO_CONFIGURED, &il->status);
3432		return 0;
3433	}
3434
3435	channels =
3436	    kcalloc(il->channel_count, sizeof(struct ieee80211_channel),
3437		    GFP_KERNEL);
3438	if (!channels)
3439		return -ENOMEM;
3440
3441	rates =
3442	    kzalloc((sizeof(struct ieee80211_rate) * RATE_COUNT_LEGACY),
3443		    GFP_KERNEL);
3444	if (!rates) {
3445		kfree(channels);
3446		return -ENOMEM;
3447	}
3448
3449	/* 5.2GHz channels start after the 2.4GHz channels */
3450	sband = &il->bands[NL80211_BAND_5GHZ];
3451	sband->channels = &channels[ARRAY_SIZE(il_eeprom_band_1)];
3452	/* just OFDM */
3453	sband->bitrates = &rates[IL_FIRST_OFDM_RATE];
3454	sband->n_bitrates = RATE_COUNT_LEGACY - IL_FIRST_OFDM_RATE;
3455
3456	if (il->cfg->sku & IL_SKU_N)
3457		il_init_ht_hw_capab(il, &sband->ht_cap, NL80211_BAND_5GHZ);
3458
3459	sband = &il->bands[NL80211_BAND_2GHZ];
3460	sband->channels = channels;
3461	/* OFDM & CCK */
3462	sband->bitrates = rates;
3463	sband->n_bitrates = RATE_COUNT_LEGACY;
3464
3465	if (il->cfg->sku & IL_SKU_N)
3466		il_init_ht_hw_capab(il, &sband->ht_cap, NL80211_BAND_2GHZ);
3467
3468	il->ieee_channels = channels;
3469	il->ieee_rates = rates;
3470
3471	for (i = 0; i < il->channel_count; i++) {
3472		ch = &il->channel_info[i];
3473
3474		if (!il_is_channel_valid(ch))
3475			continue;
3476
3477		sband = &il->bands[ch->band];
3478
3479		geo_ch = &sband->channels[sband->n_channels++];
3480
3481		geo_ch->center_freq =
3482		    ieee80211_channel_to_frequency(ch->channel, ch->band);
3483		geo_ch->max_power = ch->max_power_avg;
3484		geo_ch->max_antenna_gain = 0xff;
3485		geo_ch->hw_value = ch->channel;
3486
3487		if (il_is_channel_valid(ch)) {
3488			if (!(ch->flags & EEPROM_CHANNEL_IBSS))
3489				geo_ch->flags |= IEEE80211_CHAN_NO_IR;
3490
3491			if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
3492				geo_ch->flags |= IEEE80211_CHAN_NO_IR;
3493
3494			if (ch->flags & EEPROM_CHANNEL_RADAR)
3495				geo_ch->flags |= IEEE80211_CHAN_RADAR;
3496
3497			geo_ch->flags |= ch->ht40_extension_channel;
3498
3499			if (ch->max_power_avg > max_tx_power)
3500				max_tx_power = ch->max_power_avg;
3501		} else {
3502			geo_ch->flags |= IEEE80211_CHAN_DISABLED;
3503		}
3504
3505		D_INFO("Channel %d Freq=%d[%sGHz] %s flag=0x%X\n", ch->channel,
3506		       geo_ch->center_freq,
3507		       il_is_channel_a_band(ch) ? "5.2" : "2.4",
3508		       geo_ch->
3509		       flags & IEEE80211_CHAN_DISABLED ? "restricted" : "valid",
3510		       geo_ch->flags);
3511	}
3512
3513	il->tx_power_device_lmt = max_tx_power;
3514	il->tx_power_user_lmt = max_tx_power;
3515	il->tx_power_next = max_tx_power;
3516
3517	if (il->bands[NL80211_BAND_5GHZ].n_channels == 0 &&
3518	    (il->cfg->sku & IL_SKU_A)) {
3519		IL_INFO("Incorrectly detected BG card as ABG. "
3520			"Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
3521			il->pci_dev->device, il->pci_dev->subsystem_device);
3522		il->cfg->sku &= ~IL_SKU_A;
3523	}
3524
3525	IL_INFO("Tunable channels: %d 802.11bg, %d 802.11a channels\n",
3526		il->bands[NL80211_BAND_2GHZ].n_channels,
3527		il->bands[NL80211_BAND_5GHZ].n_channels);
3528
3529	set_bit(S_GEO_CONFIGURED, &il->status);
3530
3531	return 0;
3532}
3533EXPORT_SYMBOL(il_init_geos);
3534
3535/*
3536 * il_free_geos - undo allocations in il_init_geos
3537 */
3538void
3539il_free_geos(struct il_priv *il)
3540{
3541	kfree(il->ieee_channels);
3542	kfree(il->ieee_rates);
3543	clear_bit(S_GEO_CONFIGURED, &il->status);
3544}
3545EXPORT_SYMBOL(il_free_geos);
3546
3547static bool
3548il_is_channel_extension(struct il_priv *il, enum nl80211_band band,
3549			u16 channel, u8 extension_chan_offset)
3550{
3551	const struct il_channel_info *ch_info;
3552
3553	ch_info = il_get_channel_info(il, band, channel);
3554	if (!il_is_channel_valid(ch_info))
3555		return false;
3556
3557	if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
3558		return !(ch_info->
3559			 ht40_extension_channel & IEEE80211_CHAN_NO_HT40PLUS);
3560	else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
3561		return !(ch_info->
3562			 ht40_extension_channel & IEEE80211_CHAN_NO_HT40MINUS);
3563
3564	return false;
3565}
3566
3567bool
3568il_is_ht40_tx_allowed(struct il_priv *il, struct ieee80211_sta_ht_cap *ht_cap)
3569{
3570	if (!il->ht.enabled || !il->ht.is_40mhz)
3571		return false;
3572
3573	/*
3574	 * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
3575	 * the bit will not set if it is pure 40MHz case
3576	 */
3577	if (ht_cap && !ht_cap->ht_supported)
3578		return false;
3579
3580#ifdef CONFIG_IWLEGACY_DEBUGFS
3581	if (il->disable_ht40)
3582		return false;
3583#endif
3584
3585	return il_is_channel_extension(il, il->band,
3586				       le16_to_cpu(il->staging.channel),
3587				       il->ht.extension_chan_offset);
3588}
3589EXPORT_SYMBOL(il_is_ht40_tx_allowed);
3590
3591static u16 noinline
3592il_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
3593{
3594	u16 new_val;
3595	u16 beacon_factor;
3596
3597	/*
3598	 * If mac80211 hasn't given us a beacon interval, program
3599	 * the default into the device.
3600	 */
3601	if (!beacon_val)
3602		return DEFAULT_BEACON_INTERVAL;
3603
3604	/*
3605	 * If the beacon interval we obtained from the peer
3606	 * is too large, we'll have to wake up more often
3607	 * (and in IBSS case, we'll beacon too much)
3608	 *
3609	 * For example, if max_beacon_val is 4096, and the
3610	 * requested beacon interval is 7000, we'll have to
3611	 * use 3500 to be able to wake up on the beacons.
3612	 *
3613	 * This could badly influence beacon detection stats.
3614	 */
3615
3616	beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
3617	new_val = beacon_val / beacon_factor;
3618
3619	if (!new_val)
3620		new_val = max_beacon_val;
3621
3622	return new_val;
3623}
3624
3625int
3626il_send_rxon_timing(struct il_priv *il)
3627{
3628	u64 tsf;
3629	s32 interval_tm, rem;
3630	struct ieee80211_conf *conf = NULL;
3631	u16 beacon_int;
3632	struct ieee80211_vif *vif = il->vif;
3633
3634	conf = &il->hw->conf;
3635
3636	lockdep_assert_held(&il->mutex);
3637
3638	memset(&il->timing, 0, sizeof(struct il_rxon_time_cmd));
3639
3640	il->timing.timestamp = cpu_to_le64(il->timestamp);
3641	il->timing.listen_interval = cpu_to_le16(conf->listen_interval);
3642
3643	beacon_int = vif ? vif->bss_conf.beacon_int : 0;
3644
3645	/*
3646	 * TODO: For IBSS we need to get atim_win from mac80211,
3647	 *       for now just always use 0
3648	 */
3649	il->timing.atim_win = 0;
3650
3651	beacon_int =
3652	    il_adjust_beacon_interval(beacon_int,
3653				      il->hw_params.max_beacon_itrvl *
3654				      TIME_UNIT);
3655	il->timing.beacon_interval = cpu_to_le16(beacon_int);
3656
3657	tsf = il->timestamp;	/* tsf is modifed by do_div: copy it */
3658	interval_tm = beacon_int * TIME_UNIT;
3659	rem = do_div(tsf, interval_tm);
3660	il->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
3661
3662	il->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ? : 1) : 1;
3663
3664	D_ASSOC("beacon interval %d beacon timer %d beacon tim %d\n",
3665		le16_to_cpu(il->timing.beacon_interval),
3666		le32_to_cpu(il->timing.beacon_init_val),
3667		le16_to_cpu(il->timing.atim_win));
3668
3669	return il_send_cmd_pdu(il, C_RXON_TIMING, sizeof(il->timing),
3670			       &il->timing);
3671}
3672EXPORT_SYMBOL(il_send_rxon_timing);
3673
3674void
3675il_set_rxon_hwcrypto(struct il_priv *il, int hw_decrypt)
3676{
3677	struct il_rxon_cmd *rxon = &il->staging;
3678
3679	if (hw_decrypt)
3680		rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
3681	else
3682		rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
3683
3684}
3685EXPORT_SYMBOL(il_set_rxon_hwcrypto);
3686
3687/* validate RXON structure is valid */
3688int
3689il_check_rxon_cmd(struct il_priv *il)
3690{
3691	struct il_rxon_cmd *rxon = &il->staging;
3692	bool error = false;
3693
3694	if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
3695		if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
3696			IL_WARN("check 2.4G: wrong narrow\n");
3697			error = true;
3698		}
3699		if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
3700			IL_WARN("check 2.4G: wrong radar\n");
3701			error = true;
3702		}
3703	} else {
3704		if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
3705			IL_WARN("check 5.2G: not short slot!\n");
3706			error = true;
3707		}
3708		if (rxon->flags & RXON_FLG_CCK_MSK) {
3709			IL_WARN("check 5.2G: CCK!\n");
3710			error = true;
3711		}
3712	}
3713	if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
3714		IL_WARN("mac/bssid mcast!\n");
3715		error = true;
3716	}
3717
3718	/* make sure basic rates 6Mbps and 1Mbps are supported */
3719	if ((rxon->ofdm_basic_rates & RATE_6M_MASK) == 0 &&
3720	    (rxon->cck_basic_rates & RATE_1M_MASK) == 0) {
3721		IL_WARN("neither 1 nor 6 are basic\n");
3722		error = true;
3723	}
3724
3725	if (le16_to_cpu(rxon->assoc_id) > 2007) {
3726		IL_WARN("aid > 2007\n");
3727		error = true;
3728	}
3729
3730	if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) ==
3731	    (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
3732		IL_WARN("CCK and short slot\n");
3733		error = true;
3734	}
3735
3736	if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) ==
3737	    (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
3738		IL_WARN("CCK and auto detect");
3739		error = true;
3740	}
3741
3742	if ((rxon->
3743	     flags & (RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK)) ==
3744	    RXON_FLG_TGG_PROTECT_MSK) {
3745		IL_WARN("TGg but no auto-detect\n");
3746		error = true;
3747	}
3748
3749	if (error)
3750		IL_WARN("Tuning to channel %d\n", le16_to_cpu(rxon->channel));
3751
3752	if (error) {
3753		IL_ERR("Invalid RXON\n");
3754		return -EINVAL;
3755	}
3756	return 0;
3757}
3758EXPORT_SYMBOL(il_check_rxon_cmd);
3759
3760/*
3761 * il_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
3762 * @il: staging_rxon is compared to active_rxon
3763 *
3764 * If the RXON structure is changing enough to require a new tune,
3765 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
3766 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
3767 */
3768int
3769il_full_rxon_required(struct il_priv *il)
3770{
3771	const struct il_rxon_cmd *staging = &il->staging;
3772	const struct il_rxon_cmd *active = &il->active;
3773
3774#define CHK(cond)							\
3775	if ((cond)) {							\
3776		D_INFO("need full RXON - " #cond "\n");	\
3777		return 1;						\
3778	}
3779
3780#define CHK_NEQ(c1, c2)						\
3781	if ((c1) != (c2)) {					\
3782		D_INFO("need full RXON - "	\
3783			       #c1 " != " #c2 " - %d != %d\n",	\
3784			       (c1), (c2));			\
3785		return 1;					\
3786	}
3787
3788	/* These items are only settable from the full RXON command */
3789	CHK(!il_is_associated(il));
3790	CHK(!ether_addr_equal_64bits(staging->bssid_addr, active->bssid_addr));
3791	CHK(!ether_addr_equal_64bits(staging->node_addr, active->node_addr));
3792	CHK(!ether_addr_equal_64bits(staging->wlap_bssid_addr,
3793				     active->wlap_bssid_addr));
3794	CHK_NEQ(staging->dev_type, active->dev_type);
3795	CHK_NEQ(staging->channel, active->channel);
3796	CHK_NEQ(staging->air_propagation, active->air_propagation);
3797	CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
3798		active->ofdm_ht_single_stream_basic_rates);
3799	CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
3800		active->ofdm_ht_dual_stream_basic_rates);
3801	CHK_NEQ(staging->assoc_id, active->assoc_id);
3802
3803	/* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
3804	 * be updated with the RXON_ASSOC command -- however only some
3805	 * flag transitions are allowed using RXON_ASSOC */
3806
3807	/* Check if we are not switching bands */
3808	CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
3809		active->flags & RXON_FLG_BAND_24G_MSK);
3810
3811	/* Check if we are switching association toggle */
3812	CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
3813		active->filter_flags & RXON_FILTER_ASSOC_MSK);
3814
3815#undef CHK
3816#undef CHK_NEQ
3817
3818	return 0;
3819}
3820EXPORT_SYMBOL(il_full_rxon_required);
3821
3822u8
3823il_get_lowest_plcp(struct il_priv *il)
3824{
3825	/*
3826	 * Assign the lowest rate -- should really get this from
3827	 * the beacon skb from mac80211.
3828	 */
3829	if (il->staging.flags & RXON_FLG_BAND_24G_MSK)
3830		return RATE_1M_PLCP;
3831	else
3832		return RATE_6M_PLCP;
3833}
3834EXPORT_SYMBOL(il_get_lowest_plcp);
3835
3836static void
3837_il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3838{
3839	struct il_rxon_cmd *rxon = &il->staging;
3840
3841	if (!il->ht.enabled) {
3842		rxon->flags &=
3843		    ~(RXON_FLG_CHANNEL_MODE_MSK |
3844		      RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK | RXON_FLG_HT40_PROT_MSK
3845		      | RXON_FLG_HT_PROT_MSK);
3846		return;
3847	}
3848
3849	rxon->flags |=
3850	    cpu_to_le32(il->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
3851
3852	/* Set up channel bandwidth:
3853	 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
3854	/* clear the HT channel mode before set the mode */
3855	rxon->flags &=
3856	    ~(RXON_FLG_CHANNEL_MODE_MSK | RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3857	if (il_is_ht40_tx_allowed(il, NULL)) {
3858		/* pure ht40 */
3859		if (il->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
3860			rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
3861			/* Note: control channel is opposite of extension channel */
3862			switch (il->ht.extension_chan_offset) {
3863			case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3864				rxon->flags &=
3865				    ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3866				break;
3867			case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3868				rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3869				break;
3870			}
3871		} else {
3872			/* Note: control channel is opposite of extension channel */
3873			switch (il->ht.extension_chan_offset) {
3874			case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3875				rxon->flags &=
3876				    ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3877				rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3878				break;
3879			case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3880				rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3881				rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3882				break;
3883			case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3884			default:
3885				/* channel location only valid if in Mixed mode */
3886				IL_ERR("invalid extension channel offset\n");
3887				break;
3888			}
3889		}
3890	} else {
3891		rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
3892	}
3893
3894	if (il->ops->set_rxon_chain)
3895		il->ops->set_rxon_chain(il);
3896
3897	D_ASSOC("rxon flags 0x%X operation mode :0x%X "
3898		"extension channel offset 0x%x\n", le32_to_cpu(rxon->flags),
3899		il->ht.protection, il->ht.extension_chan_offset);
3900}
3901
3902void
3903il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3904{
3905	_il_set_rxon_ht(il, ht_conf);
3906}
3907EXPORT_SYMBOL(il_set_rxon_ht);
3908
3909/* Return valid, unused, channel for a passive scan to reset the RF */
3910u8
3911il_get_single_channel_number(struct il_priv *il, enum nl80211_band band)
3912{
3913	const struct il_channel_info *ch_info;
3914	int i;
3915	u8 channel = 0;
3916	u8 min, max;
3917
3918	if (band == NL80211_BAND_5GHZ) {
3919		min = 14;
3920		max = il->channel_count;
3921	} else {
3922		min = 0;
3923		max = 14;
3924	}
3925
3926	for (i = min; i < max; i++) {
3927		channel = il->channel_info[i].channel;
3928		if (channel == le16_to_cpu(il->staging.channel))
3929			continue;
3930
3931		ch_info = il_get_channel_info(il, band, channel);
3932		if (il_is_channel_valid(ch_info))
3933			break;
3934	}
3935
3936	return channel;
3937}
3938EXPORT_SYMBOL(il_get_single_channel_number);
3939
3940/*
3941 * il_set_rxon_channel - Set the band and channel values in staging RXON
3942 * @ch: requested channel as a pointer to struct ieee80211_channel
3943
3944 * NOTE:  Does not commit to the hardware; it sets appropriate bit fields
3945 * in the staging RXON flag structure based on the ch->band
3946 */
3947int
3948il_set_rxon_channel(struct il_priv *il, struct ieee80211_channel *ch)
3949{
3950	enum nl80211_band band = ch->band;
3951	u16 channel = ch->hw_value;
3952
3953	if (le16_to_cpu(il->staging.channel) == channel && il->band == band)
3954		return 0;
3955
3956	il->staging.channel = cpu_to_le16(channel);
3957	if (band == NL80211_BAND_5GHZ)
3958		il->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
3959	else
3960		il->staging.flags |= RXON_FLG_BAND_24G_MSK;
3961
3962	il->band = band;
3963
3964	D_INFO("Staging channel set to %d [%d]\n", channel, band);
3965
3966	return 0;
3967}
3968EXPORT_SYMBOL(il_set_rxon_channel);
3969
3970void
3971il_set_flags_for_band(struct il_priv *il, enum nl80211_band band,
3972		      struct ieee80211_vif *vif)
3973{
3974	if (band == NL80211_BAND_5GHZ) {
3975		il->staging.flags &=
3976		    ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK |
3977		      RXON_FLG_CCK_MSK);
3978		il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3979	} else {
3980		/* Copied from il_post_associate() */
3981		if (vif && vif->bss_conf.use_short_slot)
3982			il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3983		else
3984			il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3985
3986		il->staging.flags |= RXON_FLG_BAND_24G_MSK;
3987		il->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
3988		il->staging.flags &= ~RXON_FLG_CCK_MSK;
3989	}
3990}
3991EXPORT_SYMBOL(il_set_flags_for_band);
3992
3993/*
3994 * initialize rxon structure with default values from eeprom
3995 */
3996void
3997il_connection_init_rx_config(struct il_priv *il)
3998{
3999	const struct il_channel_info *ch_info;
4000
4001	memset(&il->staging, 0, sizeof(il->staging));
4002
4003	switch (il->iw_mode) {
4004	case NL80211_IFTYPE_UNSPECIFIED:
4005		il->staging.dev_type = RXON_DEV_TYPE_ESS;
4006		break;
4007	case NL80211_IFTYPE_STATION:
4008		il->staging.dev_type = RXON_DEV_TYPE_ESS;
4009		il->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
4010		break;
4011	case NL80211_IFTYPE_ADHOC:
4012		il->staging.dev_type = RXON_DEV_TYPE_IBSS;
4013		il->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
4014		il->staging.filter_flags =
4015		    RXON_FILTER_BCON_AWARE_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
4016		break;
4017	default:
4018		IL_ERR("Unsupported interface type %d\n", il->vif->type);
4019		return;
4020	}
4021
4022#if 0
4023	/* TODO:  Figure out when short_preamble would be set and cache from
4024	 * that */
4025	if (!hw_to_local(il->hw)->short_preamble)
4026		il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
4027	else
4028		il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
4029#endif
4030
4031	ch_info =
4032	    il_get_channel_info(il, il->band, le16_to_cpu(il->active.channel));
4033
4034	if (!ch_info)
4035		ch_info = &il->channel_info[0];
4036
4037	il->staging.channel = cpu_to_le16(ch_info->channel);
4038	il->band = ch_info->band;
4039
4040	il_set_flags_for_band(il, il->band, il->vif);
4041
4042	il->staging.ofdm_basic_rates =
4043	    (IL_OFDM_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
4044	il->staging.cck_basic_rates =
4045	    (IL_CCK_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
4046
4047	/* clear both MIX and PURE40 mode flag */
4048	il->staging.flags &=
4049	    ~(RXON_FLG_CHANNEL_MODE_MIXED | RXON_FLG_CHANNEL_MODE_PURE_40);
4050	if (il->vif)
4051		memcpy(il->staging.node_addr, il->vif->addr, ETH_ALEN);
4052
4053	il->staging.ofdm_ht_single_stream_basic_rates = 0xff;
4054	il->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
4055}
4056EXPORT_SYMBOL(il_connection_init_rx_config);
4057
4058void
4059il_set_rate(struct il_priv *il)
4060{
4061	const struct ieee80211_supported_band *hw = NULL;
4062	struct ieee80211_rate *rate;
4063	int i;
4064
4065	hw = il_get_hw_mode(il, il->band);
4066	if (!hw) {
4067		IL_ERR("Failed to set rate: unable to get hw mode\n");
4068		return;
4069	}
4070
4071	il->active_rate = 0;
4072
4073	for (i = 0; i < hw->n_bitrates; i++) {
4074		rate = &(hw->bitrates[i]);
4075		if (rate->hw_value < RATE_COUNT_LEGACY)
4076			il->active_rate |= (1 << rate->hw_value);
4077	}
4078
4079	D_RATE("Set active_rate = %0x\n", il->active_rate);
4080
4081	il->staging.cck_basic_rates =
4082	    (IL_CCK_BASIC_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
4083
4084	il->staging.ofdm_basic_rates =
4085	    (IL_OFDM_BASIC_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
4086}
4087EXPORT_SYMBOL(il_set_rate);
4088
4089void
4090il_chswitch_done(struct il_priv *il, bool is_success)
4091{
4092	if (test_bit(S_EXIT_PENDING, &il->status))
4093		return;
4094
4095	if (test_and_clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4096		ieee80211_chswitch_done(il->vif, is_success, 0);
4097}
4098EXPORT_SYMBOL(il_chswitch_done);
4099
4100void
4101il_hdl_csa(struct il_priv *il, struct il_rx_buf *rxb)
4102{
4103	struct il_rx_pkt *pkt = rxb_addr(rxb);
4104	struct il_csa_notification *csa = &(pkt->u.csa_notif);
4105	struct il_rxon_cmd *rxon = (void *)&il->active;
4106
4107	if (!test_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4108		return;
4109
4110	if (!le32_to_cpu(csa->status) && csa->channel == il->switch_channel) {
4111		rxon->channel = csa->channel;
4112		il->staging.channel = csa->channel;
4113		D_11H("CSA notif: channel %d\n", le16_to_cpu(csa->channel));
4114		il_chswitch_done(il, true);
4115	} else {
4116		IL_ERR("CSA notif (fail) : channel %d\n",
4117		       le16_to_cpu(csa->channel));
4118		il_chswitch_done(il, false);
4119	}
4120}
4121EXPORT_SYMBOL(il_hdl_csa);
4122
4123#ifdef CONFIG_IWLEGACY_DEBUG
4124void
4125il_print_rx_config_cmd(struct il_priv *il)
4126{
4127	struct il_rxon_cmd *rxon = &il->staging;
4128
4129	D_RADIO("RX CONFIG:\n");
4130	il_print_hex_dump(il, IL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4131	D_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4132	D_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4133	D_RADIO("u32 filter_flags: 0x%08x\n", le32_to_cpu(rxon->filter_flags));
4134	D_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4135	D_RADIO("u8 ofdm_basic_rates: 0x%02x\n", rxon->ofdm_basic_rates);
4136	D_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4137	D_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr);
4138	D_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
4139	D_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4140}
4141EXPORT_SYMBOL(il_print_rx_config_cmd);
4142#endif
4143/*
4144 * il_irq_handle_error - called for HW or SW error interrupt from card
4145 */
4146void
4147il_irq_handle_error(struct il_priv *il)
4148{
4149	/* Set the FW error flag -- cleared on il_down */
4150	set_bit(S_FW_ERROR, &il->status);
4151
4152	/* Cancel currently queued command. */
4153	clear_bit(S_HCMD_ACTIVE, &il->status);
4154
4155	IL_ERR("Loaded firmware version: %s\n", il->hw->wiphy->fw_version);
4156
4157	il->ops->dump_nic_error_log(il);
4158	if (il->ops->dump_fh)
4159		il->ops->dump_fh(il, NULL, false);
4160#ifdef CONFIG_IWLEGACY_DEBUG
4161	if (il_get_debug_level(il) & IL_DL_FW_ERRORS)
4162		il_print_rx_config_cmd(il);
4163#endif
4164
4165	wake_up(&il->wait_command_queue);
4166
4167	/* Keep the restart process from trying to send host
4168	 * commands by clearing the INIT status bit */
4169	clear_bit(S_READY, &il->status);
4170
4171	if (!test_bit(S_EXIT_PENDING, &il->status)) {
4172		IL_DBG(IL_DL_FW_ERRORS,
4173		       "Restarting adapter due to uCode error.\n");
4174
4175		if (il->cfg->mod_params->restart_fw)
4176			queue_work(il->workqueue, &il->restart);
4177	}
4178}
4179EXPORT_SYMBOL(il_irq_handle_error);
4180
4181static int
4182_il_apm_stop_master(struct il_priv *il)
4183{
4184	int ret = 0;
4185
4186	/* stop device's busmaster DMA activity */
4187	_il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
4188
4189	ret =
4190	    _il_poll_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
4191			 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
4192	if (ret < 0)
4193		IL_WARN("Master Disable Timed Out, 100 usec\n");
4194
4195	D_INFO("stop master\n");
4196
4197	return ret;
4198}
4199
4200void
4201_il_apm_stop(struct il_priv *il)
4202{
4203	lockdep_assert_held(&il->reg_lock);
4204
4205	D_INFO("Stop card, put in low power state\n");
4206
4207	/* Stop device's DMA activity */
4208	_il_apm_stop_master(il);
4209
4210	/* Reset the entire device */
4211	_il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
4212
4213	udelay(10);
4214
4215	/*
4216	 * Clear "initialization complete" bit to move adapter from
4217	 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
4218	 */
4219	_il_clear_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4220}
4221EXPORT_SYMBOL(_il_apm_stop);
4222
4223void
4224il_apm_stop(struct il_priv *il)
4225{
4226	unsigned long flags;
4227
4228	spin_lock_irqsave(&il->reg_lock, flags);
4229	_il_apm_stop(il);
4230	spin_unlock_irqrestore(&il->reg_lock, flags);
4231}
4232EXPORT_SYMBOL(il_apm_stop);
4233
4234/*
4235 * Start up NIC's basic functionality after it has been reset
4236 * (e.g. after platform boot, or shutdown via il_apm_stop())
4237 * NOTE:  This does not load uCode nor start the embedded processor
4238 */
4239int
4240il_apm_init(struct il_priv *il)
4241{
4242	int ret = 0;
4243	u16 lctl;
4244
4245	D_INFO("Init card's basic functions\n");
4246
4247	/*
4248	 * Use "set_bit" below rather than "write", to preserve any hardware
4249	 * bits already set by default after reset.
4250	 */
4251
4252	/* Disable L0S exit timer (platform NMI Work/Around) */
4253	il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4254		   CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
4255
4256	/*
4257	 * Disable L0s without affecting L1;
4258	 *  don't wait for ICH L0s (ICH bug W/A)
4259	 */
4260	il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4261		   CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
4262
4263	/* Set FH wait threshold to maximum (HW error during stress W/A) */
4264	il_set_bit(il, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
4265
4266	/*
4267	 * Enable HAP INTA (interrupt from management bus) to
4268	 * wake device's PCI Express link L1a -> L0s
4269	 * NOTE:  This is no-op for 3945 (non-existent bit)
4270	 */
4271	il_set_bit(il, CSR_HW_IF_CONFIG_REG,
4272		   CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
4273
4274	/*
4275	 * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
4276	 * Check if BIOS (or OS) enabled L1-ASPM on this device.
4277	 * If so (likely), disable L0S, so device moves directly L0->L1;
4278	 *    costs negligible amount of power savings.
4279	 * If not (unlikely), enable L0S, so there is at least some
4280	 *    power savings, even without L1.
4281	 */
4282	if (il->cfg->set_l0s) {
4283		ret = pcie_capability_read_word(il->pci_dev, PCI_EXP_LNKCTL, &lctl);
4284		if (!ret && (lctl & PCI_EXP_LNKCTL_ASPM_L1)) {
4285			/* L1-ASPM enabled; disable(!) L0S  */
4286			il_set_bit(il, CSR_GIO_REG,
4287				   CSR_GIO_REG_VAL_L0S_ENABLED);
4288			D_POWER("L1 Enabled; Disabling L0S\n");
4289		} else {
4290			/* L1-ASPM disabled; enable(!) L0S */
4291			il_clear_bit(il, CSR_GIO_REG,
4292				     CSR_GIO_REG_VAL_L0S_ENABLED);
4293			D_POWER("L1 Disabled; Enabling L0S\n");
4294		}
4295	}
4296
4297	/* Configure analog phase-lock-loop before activating to D0A */
4298	if (il->cfg->pll_cfg_val)
4299		il_set_bit(il, CSR_ANA_PLL_CFG,
4300			   il->cfg->pll_cfg_val);
4301
4302	/*
4303	 * Set "initialization complete" bit to move adapter from
4304	 * D0U* --> D0A* (powered-up active) state.
4305	 */
4306	il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4307
4308	/*
4309	 * Wait for clock stabilization; once stabilized, access to
4310	 * device-internal resources is supported, e.g. il_wr_prph()
4311	 * and accesses to uCode SRAM.
4312	 */
4313	ret =
4314	    _il_poll_bit(il, CSR_GP_CNTRL,
4315			 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
4316			 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
4317	if (ret < 0) {
4318		D_INFO("Failed to init the card\n");
4319		goto out;
4320	}
4321
4322	/*
4323	 * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
4324	 * BSM (Boostrap State Machine) is only in 3945 and 4965.
4325	 *
4326	 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
4327	 * do not disable clocks.  This preserves any hardware bits already
4328	 * set by default in "CLK_CTRL_REG" after reset.
4329	 */
4330	if (il->cfg->use_bsm)
4331		il_wr_prph(il, APMG_CLK_EN_REG,
4332			   APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
4333	else
4334		il_wr_prph(il, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT);
4335	udelay(20);
4336
4337	/* Disable L1-Active */
4338	il_set_bits_prph(il, APMG_PCIDEV_STT_REG,
4339			 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
4340
4341out:
4342	return ret;
4343}
4344EXPORT_SYMBOL(il_apm_init);
4345
4346int
4347il_set_tx_power(struct il_priv *il, s8 tx_power, bool force)
4348{
4349	int ret;
4350	s8 prev_tx_power;
4351	bool defer;
4352
4353	lockdep_assert_held(&il->mutex);
4354
4355	if (il->tx_power_user_lmt == tx_power && !force)
4356		return 0;
4357
4358	if (!il->ops->send_tx_power)
4359		return -EOPNOTSUPP;
4360
4361	/* 0 dBm mean 1 milliwatt */
4362	if (tx_power < 0) {
4363		IL_WARN("Requested user TXPOWER %d below 1 mW.\n", tx_power);
4364		return -EINVAL;
4365	}
4366
4367	if (tx_power > il->tx_power_device_lmt) {
4368		IL_WARN("Requested user TXPOWER %d above upper limit %d.\n",
4369			tx_power, il->tx_power_device_lmt);
4370		return -EINVAL;
4371	}
4372
4373	if (!il_is_ready_rf(il))
4374		return -EIO;
4375
4376	/* scan complete and commit_rxon use tx_power_next value,
4377	 * it always need to be updated for newest request */
4378	il->tx_power_next = tx_power;
4379
4380	/* do not set tx power when scanning or channel changing */
4381	defer = test_bit(S_SCANNING, &il->status) ||
4382	    memcmp(&il->active, &il->staging, sizeof(il->staging));
4383	if (defer && !force) {
4384		D_INFO("Deferring tx power set\n");
4385		return 0;
4386	}
4387
4388	prev_tx_power = il->tx_power_user_lmt;
4389	il->tx_power_user_lmt = tx_power;
4390
4391	ret = il->ops->send_tx_power(il);
4392
4393	/* if fail to set tx_power, restore the orig. tx power */
4394	if (ret) {
4395		il->tx_power_user_lmt = prev_tx_power;
4396		il->tx_power_next = prev_tx_power;
4397	}
4398	return ret;
4399}
4400EXPORT_SYMBOL(il_set_tx_power);
4401
4402void
4403il_send_bt_config(struct il_priv *il)
4404{
4405	struct il_bt_cmd bt_cmd = {
4406		.lead_time = BT_LEAD_TIME_DEF,
4407		.max_kill = BT_MAX_KILL_DEF,
4408		.kill_ack_mask = 0,
4409		.kill_cts_mask = 0,
4410	};
4411
4412	if (!bt_coex_active)
4413		bt_cmd.flags = BT_COEX_DISABLE;
4414	else
4415		bt_cmd.flags = BT_COEX_ENABLE;
4416
4417	D_INFO("BT coex %s\n",
4418	       (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
4419
4420	if (il_send_cmd_pdu(il, C_BT_CONFIG, sizeof(struct il_bt_cmd), &bt_cmd))
4421		IL_ERR("failed to send BT Coex Config\n");
4422}
4423EXPORT_SYMBOL(il_send_bt_config);
4424
4425int
4426il_send_stats_request(struct il_priv *il, u8 flags, bool clear)
4427{
4428	struct il_stats_cmd stats_cmd = {
4429		.configuration_flags = clear ? IL_STATS_CONF_CLEAR_STATS : 0,
4430	};
4431
4432	if (flags & CMD_ASYNC)
4433		return il_send_cmd_pdu_async(il, C_STATS, sizeof(struct il_stats_cmd),
4434					     &stats_cmd, NULL);
4435	else
4436		return il_send_cmd_pdu(il, C_STATS, sizeof(struct il_stats_cmd),
4437				       &stats_cmd);
4438}
4439EXPORT_SYMBOL(il_send_stats_request);
4440
4441void
4442il_hdl_pm_sleep(struct il_priv *il, struct il_rx_buf *rxb)
4443{
4444#ifdef CONFIG_IWLEGACY_DEBUG
4445	struct il_rx_pkt *pkt = rxb_addr(rxb);
4446	struct il_sleep_notification *sleep = &(pkt->u.sleep_notif);
4447	D_RX("sleep mode: %d, src: %d\n",
4448	     sleep->pm_sleep_mode, sleep->pm_wakeup_src);
4449#endif
4450}
4451EXPORT_SYMBOL(il_hdl_pm_sleep);
4452
4453void
4454il_hdl_pm_debug_stats(struct il_priv *il, struct il_rx_buf *rxb)
4455{
4456	struct il_rx_pkt *pkt = rxb_addr(rxb);
4457	u32 len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK;
4458	D_RADIO("Dumping %d bytes of unhandled notification for %s:\n", len,
4459		il_get_cmd_string(pkt->hdr.cmd));
4460	il_print_hex_dump(il, IL_DL_RADIO, pkt->u.raw, len);
4461}
4462EXPORT_SYMBOL(il_hdl_pm_debug_stats);
4463
4464void
4465il_hdl_error(struct il_priv *il, struct il_rx_buf *rxb)
4466{
4467	struct il_rx_pkt *pkt = rxb_addr(rxb);
4468
4469	IL_ERR("Error Reply type 0x%08X cmd %s (0x%02X) "
4470	       "seq 0x%04X ser 0x%08X\n",
4471	       le32_to_cpu(pkt->u.err_resp.error_type),
4472	       il_get_cmd_string(pkt->u.err_resp.cmd_id),
4473	       pkt->u.err_resp.cmd_id,
4474	       le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
4475	       le32_to_cpu(pkt->u.err_resp.error_info));
4476}
4477EXPORT_SYMBOL(il_hdl_error);
4478
4479void
4480il_clear_isr_stats(struct il_priv *il)
4481{
4482	memset(&il->isr_stats, 0, sizeof(il->isr_stats));
4483}
4484
4485int
4486il_mac_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4487	       unsigned int link_id, u16 queue,
4488	       const struct ieee80211_tx_queue_params *params)
4489{
4490	struct il_priv *il = hw->priv;
4491	unsigned long flags;
4492	int q;
4493
4494	D_MAC80211("enter\n");
4495
4496	if (!il_is_ready_rf(il)) {
4497		D_MAC80211("leave - RF not ready\n");
4498		return -EIO;
4499	}
4500
4501	if (queue >= AC_NUM) {
4502		D_MAC80211("leave - queue >= AC_NUM %d\n", queue);
4503		return 0;
4504	}
4505
4506	q = AC_NUM - 1 - queue;
4507
4508	spin_lock_irqsave(&il->lock, flags);
4509
4510	il->qos_data.def_qos_parm.ac[q].cw_min =
4511	    cpu_to_le16(params->cw_min);
4512	il->qos_data.def_qos_parm.ac[q].cw_max =
4513	    cpu_to_le16(params->cw_max);
4514	il->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
4515	il->qos_data.def_qos_parm.ac[q].edca_txop =
4516	    cpu_to_le16((params->txop * 32));
4517
4518	il->qos_data.def_qos_parm.ac[q].reserved1 = 0;
4519
4520	spin_unlock_irqrestore(&il->lock, flags);
4521
4522	D_MAC80211("leave\n");
4523	return 0;
4524}
4525EXPORT_SYMBOL(il_mac_conf_tx);
4526
4527int
4528il_mac_tx_last_beacon(struct ieee80211_hw *hw)
4529{
4530	struct il_priv *il = hw->priv;
4531	int ret;
4532
4533	D_MAC80211("enter\n");
4534
4535	ret = (il->ibss_manager == IL_IBSS_MANAGER);
4536
4537	D_MAC80211("leave ret %d\n", ret);
4538	return ret;
4539}
4540EXPORT_SYMBOL_GPL(il_mac_tx_last_beacon);
4541
4542static int
4543il_set_mode(struct il_priv *il)
4544{
4545	il_connection_init_rx_config(il);
4546
4547	if (il->ops->set_rxon_chain)
4548		il->ops->set_rxon_chain(il);
4549
4550	return il_commit_rxon(il);
4551}
4552
4553int
4554il_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4555{
4556	struct il_priv *il = hw->priv;
4557	int err;
4558	bool reset;
4559
4560	mutex_lock(&il->mutex);
4561	D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
4562
4563	if (!il_is_ready_rf(il)) {
4564		IL_WARN("Try to add interface when device not ready\n");
4565		err = -EINVAL;
4566		goto out;
4567	}
4568
4569	/*
4570	 * We do not support multiple virtual interfaces, but on hardware reset
4571	 * we have to add the same interface again.
4572	 */
4573	reset = (il->vif == vif);
4574	if (il->vif && !reset) {
4575		err = -EOPNOTSUPP;
4576		goto out;
4577	}
4578
4579	il->vif = vif;
4580	il->iw_mode = vif->type;
4581
4582	err = il_set_mode(il);
4583	if (err) {
4584		IL_WARN("Fail to set mode %d\n", vif->type);
4585		if (!reset) {
4586			il->vif = NULL;
4587			il->iw_mode = NL80211_IFTYPE_STATION;
4588		}
4589	}
4590
4591out:
4592	D_MAC80211("leave err %d\n", err);
4593	mutex_unlock(&il->mutex);
4594
4595	return err;
4596}
4597EXPORT_SYMBOL(il_mac_add_interface);
4598
4599static void
4600il_teardown_interface(struct il_priv *il, struct ieee80211_vif *vif)
4601{
4602	lockdep_assert_held(&il->mutex);
4603
4604	if (il->scan_vif == vif) {
4605		il_scan_cancel_timeout(il, 200);
4606		il_force_scan_end(il);
4607	}
4608
4609	il_set_mode(il);
4610}
4611
4612void
4613il_mac_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4614{
4615	struct il_priv *il = hw->priv;
4616
4617	mutex_lock(&il->mutex);
4618	D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
4619
4620	WARN_ON(il->vif != vif);
4621	il->vif = NULL;
4622	il->iw_mode = NL80211_IFTYPE_UNSPECIFIED;
4623	il_teardown_interface(il, vif);
4624	eth_zero_addr(il->bssid);
4625
4626	D_MAC80211("leave\n");
4627	mutex_unlock(&il->mutex);
4628}
4629EXPORT_SYMBOL(il_mac_remove_interface);
4630
4631int
4632il_alloc_txq_mem(struct il_priv *il)
4633{
4634	if (!il->txq)
4635		il->txq =
4636		    kcalloc(il->cfg->num_of_queues,
4637			    sizeof(struct il_tx_queue),
4638			    GFP_KERNEL);
4639	if (!il->txq) {
4640		IL_ERR("Not enough memory for txq\n");
4641		return -ENOMEM;
4642	}
4643	return 0;
4644}
4645EXPORT_SYMBOL(il_alloc_txq_mem);
4646
4647void
4648il_free_txq_mem(struct il_priv *il)
4649{
4650	kfree(il->txq);
4651	il->txq = NULL;
4652}
4653EXPORT_SYMBOL(il_free_txq_mem);
4654
4655int
4656il_force_reset(struct il_priv *il, bool external)
4657{
4658	struct il_force_reset *force_reset;
4659
4660	if (test_bit(S_EXIT_PENDING, &il->status))
4661		return -EINVAL;
4662
4663	force_reset = &il->force_reset;
4664	force_reset->reset_request_count++;
4665	if (!external) {
4666		if (force_reset->last_force_reset_jiffies &&
4667		    time_after(force_reset->last_force_reset_jiffies +
4668			       force_reset->reset_duration, jiffies)) {
4669			D_INFO("force reset rejected\n");
4670			force_reset->reset_reject_count++;
4671			return -EAGAIN;
4672		}
4673	}
4674	force_reset->reset_success_count++;
4675	force_reset->last_force_reset_jiffies = jiffies;
4676
4677	/*
4678	 * if the request is from external(ex: debugfs),
4679	 * then always perform the request in regardless the module
4680	 * parameter setting
4681	 * if the request is from internal (uCode error or driver
4682	 * detect failure), then fw_restart module parameter
4683	 * need to be check before performing firmware reload
4684	 */
4685
4686	if (!external && !il->cfg->mod_params->restart_fw) {
4687		D_INFO("Cancel firmware reload based on "
4688		       "module parameter setting\n");
4689		return 0;
4690	}
4691
4692	IL_ERR("On demand firmware reload\n");
4693
4694	/* Set the FW error flag -- cleared on il_down */
4695	set_bit(S_FW_ERROR, &il->status);
4696	wake_up(&il->wait_command_queue);
4697	/*
4698	 * Keep the restart process from trying to send host
4699	 * commands by clearing the INIT status bit
4700	 */
4701	clear_bit(S_READY, &il->status);
4702	queue_work(il->workqueue, &il->restart);
4703
4704	return 0;
4705}
4706EXPORT_SYMBOL(il_force_reset);
4707
4708int
4709il_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4710			enum nl80211_iftype newtype, bool newp2p)
4711{
4712	struct il_priv *il = hw->priv;
4713	int err;
4714
4715	mutex_lock(&il->mutex);
4716	D_MAC80211("enter: type %d, addr %pM newtype %d newp2p %d\n",
4717		    vif->type, vif->addr, newtype, newp2p);
4718
4719	if (newp2p) {
4720		err = -EOPNOTSUPP;
4721		goto out;
4722	}
4723
4724	if (!il->vif || !il_is_ready_rf(il)) {
4725		/*
4726		 * Huh? But wait ... this can maybe happen when
4727		 * we're in the middle of a firmware restart!
4728		 */
4729		err = -EBUSY;
4730		goto out;
4731	}
4732
4733	/* success */
4734	vif->type = newtype;
4735	vif->p2p = false;
4736	il->iw_mode = newtype;
4737	il_teardown_interface(il, vif);
4738	err = 0;
4739
4740out:
4741	D_MAC80211("leave err %d\n", err);
4742	mutex_unlock(&il->mutex);
4743
4744	return err;
4745}
4746EXPORT_SYMBOL(il_mac_change_interface);
4747
4748void il_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4749		  u32 queues, bool drop)
4750{
4751	struct il_priv *il = hw->priv;
4752	unsigned long timeout = jiffies + msecs_to_jiffies(500);
4753	int i;
4754
4755	mutex_lock(&il->mutex);
4756	D_MAC80211("enter\n");
4757
4758	if (il->txq == NULL)
4759		goto out;
4760
4761	for (i = 0; i < il->hw_params.max_txq_num; i++) {
4762		struct il_queue *q;
4763
4764		if (i == il->cmd_queue)
4765			continue;
4766
4767		q = &il->txq[i].q;
4768		if (q->read_ptr == q->write_ptr)
4769			continue;
4770
4771		if (time_after(jiffies, timeout)) {
4772			IL_ERR("Failed to flush queue %d\n", q->id);
4773			break;
4774		}
4775
4776		msleep(20);
4777	}
4778out:
4779	D_MAC80211("leave\n");
4780	mutex_unlock(&il->mutex);
4781}
4782EXPORT_SYMBOL(il_mac_flush);
4783
4784/*
4785 * On every watchdog tick we check (latest) time stamp. If it does not
4786 * change during timeout period and queue is not empty we reset firmware.
4787 */
4788static int
4789il_check_stuck_queue(struct il_priv *il, int cnt)
4790{
4791	struct il_tx_queue *txq = &il->txq[cnt];
4792	struct il_queue *q = &txq->q;
4793	unsigned long timeout;
4794	unsigned long now = jiffies;
4795	int ret;
4796
4797	if (q->read_ptr == q->write_ptr) {
4798		txq->time_stamp = now;
4799		return 0;
4800	}
4801
4802	timeout =
4803	    txq->time_stamp +
4804	    msecs_to_jiffies(il->cfg->wd_timeout);
4805
4806	if (time_after(now, timeout)) {
4807		IL_ERR("Queue %d stuck for %u ms.\n", q->id,
4808		       jiffies_to_msecs(now - txq->time_stamp));
4809		ret = il_force_reset(il, false);
4810		return (ret == -EAGAIN) ? 0 : 1;
4811	}
4812
4813	return 0;
4814}
4815
4816/*
4817 * Making watchdog tick be a quarter of timeout assure we will
4818 * discover the queue hung between timeout and 1.25*timeout
4819 */
4820#define IL_WD_TICK(timeout) ((timeout) / 4)
4821
4822/*
4823 * Watchdog timer callback, we check each tx queue for stuck, if hung
4824 * we reset the firmware. If everything is fine just rearm the timer.
4825 */
4826void
4827il_bg_watchdog(struct timer_list *t)
4828{
4829	struct il_priv *il = from_timer(il, t, watchdog);
4830	int cnt;
4831	unsigned long timeout;
4832
4833	if (test_bit(S_EXIT_PENDING, &il->status))
4834		return;
4835
4836	timeout = il->cfg->wd_timeout;
4837	if (timeout == 0)
4838		return;
4839
4840	/* monitor and check for stuck cmd queue */
4841	if (il_check_stuck_queue(il, il->cmd_queue))
4842		return;
4843
4844	/* monitor and check for other stuck queues */
4845	for (cnt = 0; cnt < il->hw_params.max_txq_num; cnt++) {
4846		/* skip as we already checked the command queue */
4847		if (cnt == il->cmd_queue)
4848			continue;
4849		if (il_check_stuck_queue(il, cnt))
4850			return;
4851	}
4852
4853	mod_timer(&il->watchdog,
4854		  jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
4855}
4856EXPORT_SYMBOL(il_bg_watchdog);
4857
4858void
4859il_setup_watchdog(struct il_priv *il)
4860{
4861	unsigned int timeout = il->cfg->wd_timeout;
4862
4863	if (timeout)
4864		mod_timer(&il->watchdog,
4865			  jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
4866	else
4867		del_timer(&il->watchdog);
4868}
4869EXPORT_SYMBOL(il_setup_watchdog);
4870
4871/*
4872 * extended beacon time format
4873 * time in usec will be changed into a 32-bit value in extended:internal format
4874 * the extended part is the beacon counts
4875 * the internal part is the time in usec within one beacon interval
4876 */
4877u32
4878il_usecs_to_beacons(struct il_priv *il, u32 usec, u32 beacon_interval)
4879{
4880	u32 quot;
4881	u32 rem;
4882	u32 interval = beacon_interval * TIME_UNIT;
4883
4884	if (!interval || !usec)
4885		return 0;
4886
4887	quot =
4888	    (usec /
4889	     interval) & (il_beacon_time_mask_high(il,
4890						   il->hw_params.
4891						   beacon_time_tsf_bits) >> il->
4892			  hw_params.beacon_time_tsf_bits);
4893	rem =
4894	    (usec % interval) & il_beacon_time_mask_low(il,
4895							il->hw_params.
4896							beacon_time_tsf_bits);
4897
4898	return (quot << il->hw_params.beacon_time_tsf_bits) + rem;
4899}
4900EXPORT_SYMBOL(il_usecs_to_beacons);
4901
4902/* base is usually what we get from ucode with each received frame,
4903 * the same as HW timer counter counting down
4904 */
4905__le32
4906il_add_beacon_time(struct il_priv *il, u32 base, u32 addon,
4907		   u32 beacon_interval)
4908{
4909	u32 base_low = base & il_beacon_time_mask_low(il,
4910						      il->hw_params.
4911						      beacon_time_tsf_bits);
4912	u32 addon_low = addon & il_beacon_time_mask_low(il,
4913							il->hw_params.
4914							beacon_time_tsf_bits);
4915	u32 interval = beacon_interval * TIME_UNIT;
4916	u32 res = (base & il_beacon_time_mask_high(il,
4917						   il->hw_params.
4918						   beacon_time_tsf_bits)) +
4919	    (addon & il_beacon_time_mask_high(il,
4920					      il->hw_params.
4921					      beacon_time_tsf_bits));
4922
4923	if (base_low > addon_low)
4924		res += base_low - addon_low;
4925	else if (base_low < addon_low) {
4926		res += interval + base_low - addon_low;
4927		res += (1 << il->hw_params.beacon_time_tsf_bits);
4928	} else
4929		res += (1 << il->hw_params.beacon_time_tsf_bits);
4930
4931	return cpu_to_le32(res);
4932}
4933EXPORT_SYMBOL(il_add_beacon_time);
4934
4935#ifdef CONFIG_PM_SLEEP
4936
4937static int
4938il_pci_suspend(struct device *device)
4939{
4940	struct il_priv *il = dev_get_drvdata(device);
 
4941
4942	/*
4943	 * This function is called when system goes into suspend state
4944	 * mac80211 will call il_mac_stop() from the mac80211 suspend function
4945	 * first but since il_mac_stop() has no knowledge of who the caller is,
4946	 * it will not call apm_ops.stop() to stop the DMA operation.
4947	 * Calling apm_ops.stop here to make sure we stop the DMA.
4948	 */
4949	il_apm_stop(il);
4950
4951	return 0;
4952}
4953
4954static int
4955il_pci_resume(struct device *device)
4956{
4957	struct pci_dev *pdev = to_pci_dev(device);
4958	struct il_priv *il = pci_get_drvdata(pdev);
4959	bool hw_rfkill = false;
4960
4961	/*
4962	 * We disable the RETRY_TIMEOUT register (0x41) to keep
4963	 * PCI Tx retries from interfering with C3 CPU state.
4964	 */
4965	pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
4966
4967	il_enable_interrupts(il);
4968
4969	if (!(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4970		hw_rfkill = true;
4971
4972	if (hw_rfkill)
4973		set_bit(S_RFKILL, &il->status);
4974	else
4975		clear_bit(S_RFKILL, &il->status);
4976
4977	wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rfkill);
4978
4979	return 0;
4980}
4981
4982SIMPLE_DEV_PM_OPS(il_pm_ops, il_pci_suspend, il_pci_resume);
4983EXPORT_SYMBOL(il_pm_ops);
4984
4985#endif /* CONFIG_PM_SLEEP */
4986
4987static void
4988il_update_qos(struct il_priv *il)
4989{
4990	if (test_bit(S_EXIT_PENDING, &il->status))
4991		return;
4992
4993	il->qos_data.def_qos_parm.qos_flags = 0;
4994
4995	if (il->qos_data.qos_active)
4996		il->qos_data.def_qos_parm.qos_flags |=
4997		    QOS_PARAM_FLG_UPDATE_EDCA_MSK;
4998
4999	if (il->ht.enabled)
5000		il->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
5001
5002	D_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
5003	      il->qos_data.qos_active, il->qos_data.def_qos_parm.qos_flags);
5004
5005	il_send_cmd_pdu_async(il, C_QOS_PARAM, sizeof(struct il_qosparam_cmd),
5006			      &il->qos_data.def_qos_parm, NULL);
5007}
5008
5009/*
5010 * il_mac_config - mac80211 config callback
5011 */
5012int
5013il_mac_config(struct ieee80211_hw *hw, u32 changed)
5014{
5015	struct il_priv *il = hw->priv;
5016	const struct il_channel_info *ch_info;
5017	struct ieee80211_conf *conf = &hw->conf;
5018	struct ieee80211_channel *channel = conf->chandef.chan;
5019	struct il_ht_config *ht_conf = &il->current_ht_config;
5020	unsigned long flags = 0;
5021	int ret = 0;
5022	u16 ch;
5023	int scan_active = 0;
5024	bool ht_changed = false;
5025
5026	mutex_lock(&il->mutex);
5027	D_MAC80211("enter: channel %d changed 0x%X\n", channel->hw_value,
5028		   changed);
5029
5030	if (unlikely(test_bit(S_SCANNING, &il->status))) {
5031		scan_active = 1;
5032		D_MAC80211("scan active\n");
5033	}
5034
5035	if (changed &
5036	    (IEEE80211_CONF_CHANGE_SMPS | IEEE80211_CONF_CHANGE_CHANNEL)) {
5037		/* mac80211 uses static for non-HT which is what we want */
5038		il->current_ht_config.smps = conf->smps_mode;
5039
5040		/*
5041		 * Recalculate chain counts.
5042		 *
5043		 * If monitor mode is enabled then mac80211 will
5044		 * set up the SM PS mode to OFF if an HT channel is
5045		 * configured.
5046		 */
5047		if (il->ops->set_rxon_chain)
5048			il->ops->set_rxon_chain(il);
5049	}
5050
5051	/* during scanning mac80211 will delay channel setting until
5052	 * scan finish with changed = 0
5053	 */
5054	if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
5055
5056		if (scan_active)
5057			goto set_ch_out;
5058
5059		ch = channel->hw_value;
5060		ch_info = il_get_channel_info(il, channel->band, ch);
5061		if (!il_is_channel_valid(ch_info)) {
5062			D_MAC80211("leave - invalid channel\n");
5063			ret = -EINVAL;
5064			goto set_ch_out;
5065		}
5066
5067		if (il->iw_mode == NL80211_IFTYPE_ADHOC &&
5068		    !il_is_channel_ibss(ch_info)) {
5069			D_MAC80211("leave - not IBSS channel\n");
5070			ret = -EINVAL;
5071			goto set_ch_out;
5072		}
5073
5074		spin_lock_irqsave(&il->lock, flags);
5075
5076		/* Configure HT40 channels */
5077		if (il->ht.enabled != conf_is_ht(conf)) {
5078			il->ht.enabled = conf_is_ht(conf);
5079			ht_changed = true;
5080		}
5081		if (il->ht.enabled) {
5082			if (conf_is_ht40_minus(conf)) {
5083				il->ht.extension_chan_offset =
5084				    IEEE80211_HT_PARAM_CHA_SEC_BELOW;
5085				il->ht.is_40mhz = true;
5086			} else if (conf_is_ht40_plus(conf)) {
5087				il->ht.extension_chan_offset =
5088				    IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
5089				il->ht.is_40mhz = true;
5090			} else {
5091				il->ht.extension_chan_offset =
5092				    IEEE80211_HT_PARAM_CHA_SEC_NONE;
5093				il->ht.is_40mhz = false;
5094			}
5095		} else
5096			il->ht.is_40mhz = false;
5097
5098		/*
5099		 * Default to no protection. Protection mode will
5100		 * later be set from BSS config in il_ht_conf
5101		 */
5102		il->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
5103
5104		/* if we are switching from ht to 2.4 clear flags
5105		 * from any ht related info since 2.4 does not
5106		 * support ht */
5107		if ((le16_to_cpu(il->staging.channel) != ch))
5108			il->staging.flags = 0;
5109
5110		il_set_rxon_channel(il, channel);
5111		il_set_rxon_ht(il, ht_conf);
5112
5113		il_set_flags_for_band(il, channel->band, il->vif);
5114
5115		spin_unlock_irqrestore(&il->lock, flags);
5116
5117		if (il->ops->update_bcast_stations)
5118			ret = il->ops->update_bcast_stations(il);
5119
5120set_ch_out:
5121		/* The list of supported rates and rate mask can be different
5122		 * for each band; since the band may have changed, reset
5123		 * the rate mask to what mac80211 lists */
5124		il_set_rate(il);
5125	}
5126
5127	if (changed & (IEEE80211_CONF_CHANGE_PS | IEEE80211_CONF_CHANGE_IDLE)) {
5128		il->power_data.ps_disabled = !(conf->flags & IEEE80211_CONF_PS);
5129		if (!il->power_data.ps_disabled)
5130			IL_WARN_ONCE("Enabling power save might cause firmware crashes\n");
5131		ret = il_power_update_mode(il, false);
5132		if (ret)
5133			D_MAC80211("Error setting sleep level\n");
5134	}
5135
5136	if (changed & IEEE80211_CONF_CHANGE_POWER) {
5137		D_MAC80211("TX Power old=%d new=%d\n", il->tx_power_user_lmt,
5138			   conf->power_level);
5139
5140		il_set_tx_power(il, conf->power_level, false);
5141	}
5142
5143	if (!il_is_ready(il)) {
5144		D_MAC80211("leave - not ready\n");
5145		goto out;
5146	}
5147
5148	if (scan_active)
5149		goto out;
5150
5151	if (memcmp(&il->active, &il->staging, sizeof(il->staging)))
5152		il_commit_rxon(il);
5153	else
5154		D_INFO("Not re-sending same RXON configuration.\n");
5155	if (ht_changed)
5156		il_update_qos(il);
5157
5158out:
5159	D_MAC80211("leave ret %d\n", ret);
5160	mutex_unlock(&il->mutex);
5161
5162	return ret;
5163}
5164EXPORT_SYMBOL(il_mac_config);
5165
5166void
5167il_mac_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5168{
5169	struct il_priv *il = hw->priv;
5170	unsigned long flags;
5171
5172	mutex_lock(&il->mutex);
5173	D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
5174
5175	spin_lock_irqsave(&il->lock, flags);
5176
5177	memset(&il->current_ht_config, 0, sizeof(struct il_ht_config));
5178
5179	/* new association get rid of ibss beacon skb */
5180	dev_consume_skb_irq(il->beacon_skb);
 
5181	il->beacon_skb = NULL;
5182	il->timestamp = 0;
5183
5184	spin_unlock_irqrestore(&il->lock, flags);
5185
5186	il_scan_cancel_timeout(il, 100);
5187	if (!il_is_ready_rf(il)) {
5188		D_MAC80211("leave - not ready\n");
5189		mutex_unlock(&il->mutex);
5190		return;
5191	}
5192
5193	/* we are restarting association process */
5194	il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5195	il_commit_rxon(il);
5196
5197	il_set_rate(il);
5198
5199	D_MAC80211("leave\n");
5200	mutex_unlock(&il->mutex);
5201}
5202EXPORT_SYMBOL(il_mac_reset_tsf);
5203
5204static void
5205il_ht_conf(struct il_priv *il, struct ieee80211_vif *vif)
5206{
5207	struct il_ht_config *ht_conf = &il->current_ht_config;
5208	struct ieee80211_sta *sta;
5209	struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
5210
5211	D_ASSOC("enter:\n");
5212
5213	if (!il->ht.enabled)
5214		return;
5215
5216	il->ht.protection =
5217	    bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
5218	il->ht.non_gf_sta_present =
5219	    !!(bss_conf->
5220	       ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
5221
5222	ht_conf->single_chain_sufficient = false;
5223
5224	switch (vif->type) {
5225	case NL80211_IFTYPE_STATION:
5226		rcu_read_lock();
5227		sta = ieee80211_find_sta(vif, bss_conf->bssid);
5228		if (sta) {
5229			struct ieee80211_sta_ht_cap *ht_cap = &sta->deflink.ht_cap;
5230			int maxstreams;
5231
5232			maxstreams =
5233			    (ht_cap->mcs.
5234			     tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
5235			    >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
5236			maxstreams += 1;
5237
5238			if (ht_cap->mcs.rx_mask[1] == 0 &&
5239			    ht_cap->mcs.rx_mask[2] == 0)
5240				ht_conf->single_chain_sufficient = true;
5241			if (maxstreams <= 1)
5242				ht_conf->single_chain_sufficient = true;
5243		} else {
5244			/*
5245			 * If at all, this can only happen through a race
5246			 * when the AP disconnects us while we're still
5247			 * setting up the connection, in that case mac80211
5248			 * will soon tell us about that.
5249			 */
5250			ht_conf->single_chain_sufficient = true;
5251		}
5252		rcu_read_unlock();
5253		break;
5254	case NL80211_IFTYPE_ADHOC:
5255		ht_conf->single_chain_sufficient = true;
5256		break;
5257	default:
5258		break;
5259	}
5260
5261	D_ASSOC("leave\n");
5262}
5263
5264static inline void
5265il_set_no_assoc(struct il_priv *il, struct ieee80211_vif *vif)
5266{
5267	/*
5268	 * inform the ucode that there is no longer an
5269	 * association and that no more packets should be
5270	 * sent
5271	 */
5272	il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5273	il->staging.assoc_id = 0;
5274	il_commit_rxon(il);
5275}
5276
5277static void
5278il_beacon_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5279{
5280	struct il_priv *il = hw->priv;
5281	unsigned long flags;
5282	__le64 timestamp;
5283	struct sk_buff *skb = ieee80211_beacon_get(hw, vif, 0);
5284
5285	if (!skb)
5286		return;
5287
5288	D_MAC80211("enter\n");
5289
5290	lockdep_assert_held(&il->mutex);
5291
5292	if (!il->beacon_enabled) {
5293		IL_ERR("update beacon with no beaconing enabled\n");
5294		dev_kfree_skb(skb);
5295		return;
5296	}
5297
5298	spin_lock_irqsave(&il->lock, flags);
5299	dev_consume_skb_irq(il->beacon_skb);
 
 
 
5300	il->beacon_skb = skb;
5301
5302	timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
5303	il->timestamp = le64_to_cpu(timestamp);
5304
5305	D_MAC80211("leave\n");
5306	spin_unlock_irqrestore(&il->lock, flags);
5307
5308	if (!il_is_ready_rf(il)) {
5309		D_MAC80211("leave - RF not ready\n");
5310		return;
5311	}
5312
5313	il->ops->post_associate(il);
5314}
5315
5316void
5317il_mac_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5318			struct ieee80211_bss_conf *bss_conf, u64 changes)
5319{
5320	struct il_priv *il = hw->priv;
5321	int ret;
5322
5323	mutex_lock(&il->mutex);
5324	D_MAC80211("enter: changes 0x%llx\n", changes);
5325
5326	if (!il_is_alive(il)) {
5327		D_MAC80211("leave - not alive\n");
5328		mutex_unlock(&il->mutex);
5329		return;
5330	}
5331
5332	if (changes & BSS_CHANGED_QOS) {
5333		unsigned long flags;
5334
5335		spin_lock_irqsave(&il->lock, flags);
5336		il->qos_data.qos_active = bss_conf->qos;
5337		il_update_qos(il);
5338		spin_unlock_irqrestore(&il->lock, flags);
5339	}
5340
5341	if (changes & BSS_CHANGED_BEACON_ENABLED) {
5342		/* FIXME: can we remove beacon_enabled ? */
5343		if (vif->bss_conf.enable_beacon)
5344			il->beacon_enabled = true;
5345		else
5346			il->beacon_enabled = false;
5347	}
5348
5349	if (changes & BSS_CHANGED_BSSID) {
5350		D_MAC80211("BSSID %pM\n", bss_conf->bssid);
5351
5352		/*
5353		 * On passive channel we wait with blocked queues to see if
5354		 * there is traffic on that channel. If no frame will be
5355		 * received (what is very unlikely since scan detects AP on
5356		 * that channel, but theoretically possible), mac80211 associate
5357		 * procedure will time out and mac80211 will call us with NULL
5358		 * bssid. We have to unblock queues on such condition.
5359		 */
5360		if (is_zero_ether_addr(bss_conf->bssid))
5361			il_wake_queues_by_reason(il, IL_STOP_REASON_PASSIVE);
5362
5363		/*
5364		 * If there is currently a HW scan going on in the background,
5365		 * then we need to cancel it, otherwise sometimes we are not
5366		 * able to authenticate (FIXME: why ?)
5367		 */
5368		if (il_scan_cancel_timeout(il, 100)) {
5369			D_MAC80211("leave - scan abort failed\n");
5370			mutex_unlock(&il->mutex);
5371			return;
5372		}
5373
5374		/* mac80211 only sets assoc when in STATION mode */
5375		memcpy(il->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
5376
5377		/* FIXME: currently needed in a few places */
5378		memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5379	}
5380
5381	/*
5382	 * This needs to be after setting the BSSID in case
5383	 * mac80211 decides to do both changes at once because
5384	 * it will invoke post_associate.
5385	 */
5386	if (vif->type == NL80211_IFTYPE_ADHOC && (changes & BSS_CHANGED_BEACON))
5387		il_beacon_update(hw, vif);
5388
5389	if (changes & BSS_CHANGED_ERP_PREAMBLE) {
5390		D_MAC80211("ERP_PREAMBLE %d\n", bss_conf->use_short_preamble);
5391		if (bss_conf->use_short_preamble)
5392			il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5393		else
5394			il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5395	}
5396
5397	if (changes & BSS_CHANGED_ERP_CTS_PROT) {
5398		D_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
5399		if (bss_conf->use_cts_prot && il->band != NL80211_BAND_5GHZ)
5400			il->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
5401		else
5402			il->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
5403		if (bss_conf->use_cts_prot)
5404			il->staging.flags |= RXON_FLG_SELF_CTS_EN;
5405		else
5406			il->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
5407	}
5408
5409	if (changes & BSS_CHANGED_BASIC_RATES) {
5410		/* XXX use this information
5411		 *
5412		 * To do that, remove code from il_set_rate() and put something
5413		 * like this here:
5414		 *
5415		 if (A-band)
5416		 il->staging.ofdm_basic_rates =
5417		 bss_conf->basic_rates;
5418		 else
5419		 il->staging.ofdm_basic_rates =
5420		 bss_conf->basic_rates >> 4;
5421		 il->staging.cck_basic_rates =
5422		 bss_conf->basic_rates & 0xF;
5423		 */
5424	}
5425
5426	if (changes & BSS_CHANGED_HT) {
5427		il_ht_conf(il, vif);
5428
5429		if (il->ops->set_rxon_chain)
5430			il->ops->set_rxon_chain(il);
5431	}
5432
5433	if (changes & BSS_CHANGED_ASSOC) {
5434		D_MAC80211("ASSOC %d\n", vif->cfg.assoc);
5435		if (vif->cfg.assoc) {
5436			il->timestamp = bss_conf->sync_tsf;
5437
5438			if (!il_is_rfkill(il))
5439				il->ops->post_associate(il);
5440		} else
5441			il_set_no_assoc(il, vif);
5442	}
5443
5444	if (changes && il_is_associated(il) && vif->cfg.aid) {
5445		D_MAC80211("Changes (%#llx) while associated\n", changes);
5446		ret = il_send_rxon_assoc(il);
5447		if (!ret) {
5448			/* Sync active_rxon with latest change. */
5449			memcpy((void *)&il->active, &il->staging,
5450			       sizeof(struct il_rxon_cmd));
5451		}
5452	}
5453
5454	if (changes & BSS_CHANGED_BEACON_ENABLED) {
5455		if (vif->bss_conf.enable_beacon) {
5456			memcpy(il->staging.bssid_addr, bss_conf->bssid,
5457			       ETH_ALEN);
5458			memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5459			il->ops->config_ap(il);
5460		} else
5461			il_set_no_assoc(il, vif);
5462	}
5463
5464	if (changes & BSS_CHANGED_IBSS) {
5465		ret = il->ops->manage_ibss_station(il, vif,
5466						   vif->cfg.ibss_joined);
5467		if (ret)
5468			IL_ERR("failed to %s IBSS station %pM\n",
5469			       vif->cfg.ibss_joined ? "add" : "remove",
5470			       bss_conf->bssid);
5471	}
5472
5473	D_MAC80211("leave\n");
5474	mutex_unlock(&il->mutex);
5475}
5476EXPORT_SYMBOL(il_mac_bss_info_changed);
5477
5478irqreturn_t
5479il_isr(int irq, void *data)
5480{
5481	struct il_priv *il = data;
5482	u32 inta, inta_mask;
5483	u32 inta_fh;
5484	unsigned long flags;
5485	if (!il)
5486		return IRQ_NONE;
5487
5488	spin_lock_irqsave(&il->lock, flags);
5489
5490	/* Disable (but don't clear!) interrupts here to avoid
5491	 *    back-to-back ISRs and sporadic interrupts from our NIC.
5492	 * If we have something to service, the tasklet will re-enable ints.
5493	 * If we *don't* have something, we'll re-enable before leaving here. */
5494	inta_mask = _il_rd(il, CSR_INT_MASK);	/* just for debug */
5495	_il_wr(il, CSR_INT_MASK, 0x00000000);
5496
5497	/* Discover which interrupts are active/pending */
5498	inta = _il_rd(il, CSR_INT);
5499	inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
5500
5501	/* Ignore interrupt if there's nothing in NIC to service.
5502	 * This may be due to IRQ shared with another device,
5503	 * or due to sporadic interrupts thrown from our NIC. */
5504	if (!inta && !inta_fh) {
5505		D_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
5506		goto none;
5507	}
5508
5509	if (inta == 0xFFFFFFFF || (inta & 0xFFFFFFF0) == 0xa5a5a5a0) {
5510		/* Hardware disappeared. It might have already raised
5511		 * an interrupt */
5512		IL_WARN("HARDWARE GONE?? INTA == 0x%08x\n", inta);
5513		goto unplugged;
5514	}
5515
5516	D_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta, inta_mask,
5517	      inta_fh);
5518
5519	inta &= ~CSR_INT_BIT_SCD;
5520
5521	/* il_irq_tasklet() will service interrupts and re-enable them */
5522	if (likely(inta || inta_fh))
5523		tasklet_schedule(&il->irq_tasklet);
5524
5525unplugged:
5526	spin_unlock_irqrestore(&il->lock, flags);
5527	return IRQ_HANDLED;
5528
5529none:
5530	/* re-enable interrupts here since we don't have anything to service. */
5531	/* only Re-enable if disabled by irq */
5532	if (test_bit(S_INT_ENABLED, &il->status))
5533		il_enable_interrupts(il);
5534	spin_unlock_irqrestore(&il->lock, flags);
5535	return IRQ_NONE;
5536}
5537EXPORT_SYMBOL(il_isr);
5538
5539/*
5540 *  il_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
5541 *  function.
5542 */
5543void
5544il_tx_cmd_protection(struct il_priv *il, struct ieee80211_tx_info *info,
5545		     __le16 fc, __le32 *tx_flags)
5546{
5547	if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
5548		*tx_flags |= TX_CMD_FLG_RTS_MSK;
5549		*tx_flags &= ~TX_CMD_FLG_CTS_MSK;
5550		*tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5551
5552		if (!ieee80211_is_mgmt(fc))
5553			return;
5554
5555		switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
5556		case cpu_to_le16(IEEE80211_STYPE_AUTH):
5557		case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
5558		case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
5559		case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
5560			*tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5561			*tx_flags |= TX_CMD_FLG_CTS_MSK;
5562			break;
5563		}
5564	} else if (info->control.rates[0].
5565		   flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
5566		*tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5567		*tx_flags |= TX_CMD_FLG_CTS_MSK;
5568		*tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5569	}
5570}
5571EXPORT_SYMBOL(il_tx_cmd_protection);