1 /*
2  * drivers/net/wireless/mwl8k.c
3  * Driver for Marvell TOPDOG 802.11 Wireless cards
4  *
5  * Copyright (C) 2008, 2009, 2010 Marvell Semiconductor Inc.
6  *
7  * This file is licensed under the terms of the GNU General Public
8  * License version 2.  This program is licensed "as is" without any
9  * warranty of any kind, whether express or implied.
10  */
11 
12 #include <linux/interrupt.h>
13 #include <linux/module.h>
14 #include <linux/kernel.h>
15 #include <linux/sched.h>
16 #include <linux/spinlock.h>
17 #include <linux/list.h>
18 #include <linux/pci.h>
19 #include <linux/delay.h>
20 #include <linux/completion.h>
21 #include <linux/etherdevice.h>
22 #include <linux/slab.h>
23 #include <net/mac80211.h>
24 #include <linux/moduleparam.h>
25 #include <linux/firmware.h>
26 #include <linux/workqueue.h>
27 
28 #define MWL8K_DESC	"Marvell TOPDOG(R) 802.11 Wireless Network Driver"
29 #define MWL8K_NAME	KBUILD_MODNAME
30 #define MWL8K_VERSION	"0.13"
31 
32 /* Module parameters */
33 static bool ap_mode_default;
34 module_param(ap_mode_default, bool, 0);
35 MODULE_PARM_DESC(ap_mode_default,
36 		 "Set to 1 to make ap mode the default instead of sta mode");
37 
38 /* Register definitions */
39 #define MWL8K_HIU_GEN_PTR			0x00000c10
40 #define  MWL8K_MODE_STA				 0x0000005a
41 #define  MWL8K_MODE_AP				 0x000000a5
42 #define MWL8K_HIU_INT_CODE			0x00000c14
43 #define  MWL8K_FWSTA_READY			 0xf0f1f2f4
44 #define  MWL8K_FWAP_READY			 0xf1f2f4a5
45 #define  MWL8K_INT_CODE_CMD_FINISHED		 0x00000005
46 #define MWL8K_HIU_SCRATCH			0x00000c40
47 
48 /* Host->device communications */
49 #define MWL8K_HIU_H2A_INTERRUPT_EVENTS		0x00000c18
50 #define MWL8K_HIU_H2A_INTERRUPT_STATUS		0x00000c1c
51 #define MWL8K_HIU_H2A_INTERRUPT_MASK		0x00000c20
52 #define MWL8K_HIU_H2A_INTERRUPT_CLEAR_SEL	0x00000c24
53 #define MWL8K_HIU_H2A_INTERRUPT_STATUS_MASK	0x00000c28
54 #define  MWL8K_H2A_INT_DUMMY			 (1 << 20)
55 #define  MWL8K_H2A_INT_RESET			 (1 << 15)
56 #define  MWL8K_H2A_INT_DOORBELL			 (1 << 1)
57 #define  MWL8K_H2A_INT_PPA_READY		 (1 << 0)
58 
59 /* Device->host communications */
60 #define MWL8K_HIU_A2H_INTERRUPT_EVENTS		0x00000c2c
61 #define MWL8K_HIU_A2H_INTERRUPT_STATUS		0x00000c30
62 #define MWL8K_HIU_A2H_INTERRUPT_MASK		0x00000c34
63 #define MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL	0x00000c38
64 #define MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK	0x00000c3c
65 #define  MWL8K_A2H_INT_DUMMY			 (1 << 20)
66 #define  MWL8K_A2H_INT_BA_WATCHDOG		 (1 << 14)
67 #define  MWL8K_A2H_INT_CHNL_SWITCHED		 (1 << 11)
68 #define  MWL8K_A2H_INT_QUEUE_EMPTY		 (1 << 10)
69 #define  MWL8K_A2H_INT_RADAR_DETECT		 (1 << 7)
70 #define  MWL8K_A2H_INT_RADIO_ON			 (1 << 6)
71 #define  MWL8K_A2H_INT_RADIO_OFF		 (1 << 5)
72 #define  MWL8K_A2H_INT_MAC_EVENT		 (1 << 3)
73 #define  MWL8K_A2H_INT_OPC_DONE			 (1 << 2)
74 #define  MWL8K_A2H_INT_RX_READY			 (1 << 1)
75 #define  MWL8K_A2H_INT_TX_DONE			 (1 << 0)
76 
77 /* HW micro second timer register
78  * located at offset 0xA600. This
79  * will be used to timestamp tx
80  * packets.
81  */
82 
83 #define	MWL8K_HW_TIMER_REGISTER			0x0000a600
84 #define BBU_RXRDY_CNT_REG			0x0000a860
85 #define NOK_CCA_CNT_REG				0x0000a6a0
86 #define BBU_AVG_NOISE_VAL			0x67
87 
88 #define MWL8K_A2H_EVENTS	(MWL8K_A2H_INT_DUMMY | \
89 				 MWL8K_A2H_INT_CHNL_SWITCHED | \
90 				 MWL8K_A2H_INT_QUEUE_EMPTY | \
91 				 MWL8K_A2H_INT_RADAR_DETECT | \
92 				 MWL8K_A2H_INT_RADIO_ON | \
93 				 MWL8K_A2H_INT_RADIO_OFF | \
94 				 MWL8K_A2H_INT_MAC_EVENT | \
95 				 MWL8K_A2H_INT_OPC_DONE | \
96 				 MWL8K_A2H_INT_RX_READY | \
97 				 MWL8K_A2H_INT_TX_DONE | \
98 				 MWL8K_A2H_INT_BA_WATCHDOG)
99 
100 #define MWL8K_RX_QUEUES		1
101 #define MWL8K_TX_WMM_QUEUES	4
102 #define MWL8K_MAX_AMPDU_QUEUES	8
103 #define MWL8K_MAX_TX_QUEUES	(MWL8K_TX_WMM_QUEUES + MWL8K_MAX_AMPDU_QUEUES)
104 #define mwl8k_tx_queues(priv)	(MWL8K_TX_WMM_QUEUES + (priv)->num_ampdu_queues)
105 
106 /* txpriorities are mapped with hw queues.
107  * Each hw queue has a txpriority.
108  */
109 #define TOTAL_HW_TX_QUEUES	8
110 
111 /* Each HW queue can have one AMPDU stream.
112  * But, because one of the hw queue is reserved,
113  * maximum AMPDU queues that can be created are
114  * one short of total tx queues.
115  */
116 #define MWL8K_NUM_AMPDU_STREAMS	(TOTAL_HW_TX_QUEUES - 1)
117 
118 #define MWL8K_NUM_CHANS 18
119 
120 struct rxd_ops {
121 	int rxd_size;
122 	void (*rxd_init)(void *rxd, dma_addr_t next_dma_addr);
123 	void (*rxd_refill)(void *rxd, dma_addr_t addr, int len);
124 	int (*rxd_process)(void *rxd, struct ieee80211_rx_status *status,
125 			   __le16 *qos, s8 *noise);
126 };
127 
128 struct mwl8k_device_info {
129 	char *part_name;
130 	char *helper_image;
131 	char *fw_image_sta;
132 	char *fw_image_ap;
133 	struct rxd_ops *ap_rxd_ops;
134 	u32 fw_api_ap;
135 };
136 
137 struct mwl8k_rx_queue {
138 	int rxd_count;
139 
140 	/* hw receives here */
141 	int head;
142 
143 	/* refill descs here */
144 	int tail;
145 
146 	void *rxd;
147 	dma_addr_t rxd_dma;
148 	struct {
149 		struct sk_buff *skb;
150 		DEFINE_DMA_UNMAP_ADDR(dma);
151 	} *buf;
152 };
153 
154 struct mwl8k_tx_queue {
155 	/* hw transmits here */
156 	int head;
157 
158 	/* sw appends here */
159 	int tail;
160 
161 	unsigned int len;
162 	struct mwl8k_tx_desc *txd;
163 	dma_addr_t txd_dma;
164 	struct sk_buff **skb;
165 };
166 
167 enum {
168 	AMPDU_NO_STREAM,
169 	AMPDU_STREAM_NEW,
170 	AMPDU_STREAM_IN_PROGRESS,
171 	AMPDU_STREAM_ACTIVE,
172 };
173 
174 struct mwl8k_ampdu_stream {
175 	struct ieee80211_sta *sta;
176 	u8 tid;
177 	u8 state;
178 	u8 idx;
179 };
180 
181 struct mwl8k_priv {
182 	struct ieee80211_hw *hw;
183 	struct pci_dev *pdev;
184 	int irq;
185 
186 	struct mwl8k_device_info *device_info;
187 
188 	void __iomem *sram;
189 	void __iomem *regs;
190 
191 	/* firmware */
192 	const struct firmware *fw_helper;
193 	const struct firmware *fw_ucode;
194 
195 	/* hardware/firmware parameters */
196 	bool ap_fw;
197 	struct rxd_ops *rxd_ops;
198 	struct ieee80211_supported_band band_24;
199 	struct ieee80211_channel channels_24[14];
200 	struct ieee80211_rate rates_24[13];
201 	struct ieee80211_supported_band band_50;
202 	struct ieee80211_channel channels_50[9];
203 	struct ieee80211_rate rates_50[8];
204 	u32 ap_macids_supported;
205 	u32 sta_macids_supported;
206 
207 	/* Ampdu stream information */
208 	u8 num_ampdu_queues;
209 	spinlock_t stream_lock;
210 	struct mwl8k_ampdu_stream ampdu[MWL8K_MAX_AMPDU_QUEUES];
211 	struct work_struct watchdog_ba_handle;
212 
213 	/* firmware access */
214 	struct mutex fw_mutex;
215 	struct task_struct *fw_mutex_owner;
216 	struct task_struct *hw_restart_owner;
217 	int fw_mutex_depth;
218 	struct completion *hostcmd_wait;
219 
220 	atomic_t watchdog_event_pending;
221 
222 	/* lock held over TX and TX reap */
223 	spinlock_t tx_lock;
224 
225 	/* TX quiesce completion, protected by fw_mutex and tx_lock */
226 	struct completion *tx_wait;
227 
228 	/* List of interfaces.  */
229 	u32 macids_used;
230 	struct list_head vif_list;
231 
232 	/* power management status cookie from firmware */
233 	u32 *cookie;
234 	dma_addr_t cookie_dma;
235 
236 	u16 num_mcaddrs;
237 	u8 hw_rev;
238 	u32 fw_rev;
239 	u32 caps;
240 
241 	/*
242 	 * Running count of TX packets in flight, to avoid
243 	 * iterating over the transmit rings each time.
244 	 */
245 	int pending_tx_pkts;
246 
247 	struct mwl8k_rx_queue rxq[MWL8K_RX_QUEUES];
248 	struct mwl8k_tx_queue txq[MWL8K_MAX_TX_QUEUES];
249 	u32 txq_offset[MWL8K_MAX_TX_QUEUES];
250 
251 	bool radio_on;
252 	bool radio_short_preamble;
253 	bool sniffer_enabled;
254 	bool wmm_enabled;
255 
256 	/* XXX need to convert this to handle multiple interfaces */
257 	bool capture_beacon;
258 	u8 capture_bssid[ETH_ALEN];
259 	struct sk_buff *beacon_skb;
260 
261 	/*
262 	 * This FJ worker has to be global as it is scheduled from the
263 	 * RX handler.  At this point we don't know which interface it
264 	 * belongs to until the list of bssids waiting to complete join
265 	 * is checked.
266 	 */
267 	struct work_struct finalize_join_worker;
268 
269 	/* Tasklet to perform TX reclaim.  */
270 	struct tasklet_struct poll_tx_task;
271 
272 	/* Tasklet to perform RX.  */
273 	struct tasklet_struct poll_rx_task;
274 
275 	/* Most recently reported noise in dBm */
276 	s8 noise;
277 
278 	/*
279 	 * preserve the queue configurations so they can be restored if/when
280 	 * the firmware image is swapped.
281 	 */
282 	struct ieee80211_tx_queue_params wmm_params[MWL8K_TX_WMM_QUEUES];
283 
284 	/* To perform the task of reloading the firmware */
285 	struct work_struct fw_reload;
286 	bool hw_restart_in_progress;
287 
288 	/* async firmware loading state */
289 	unsigned fw_state;
290 	char *fw_pref;
291 	char *fw_alt;
292 	bool is_8764;
293 	struct completion firmware_loading_complete;
294 
295 	/* bitmap of running BSSes */
296 	u32 running_bsses;
297 
298 	/* ACS related */
299 	bool sw_scan_start;
300 	struct ieee80211_channel *acs_chan;
301 	unsigned long channel_time;
302 	struct survey_info survey[MWL8K_NUM_CHANS];
303 };
304 
305 #define MAX_WEP_KEY_LEN         13
306 #define NUM_WEP_KEYS            4
307 
308 /* Per interface specific private data */
309 struct mwl8k_vif {
310 	struct list_head list;
311 	struct ieee80211_vif *vif;
312 
313 	/* Firmware macid for this vif.  */
314 	int macid;
315 
316 	/* Non AMPDU sequence number assigned by driver.  */
317 	u16 seqno;
318 
319 	/* Saved WEP keys */
320 	struct {
321 		u8 enabled;
322 		u8 key[sizeof(struct ieee80211_key_conf) + MAX_WEP_KEY_LEN];
323 	} wep_key_conf[NUM_WEP_KEYS];
324 
325 	/* BSSID */
326 	u8 bssid[ETH_ALEN];
327 
328 	/* A flag to indicate is HW crypto is enabled for this bssid */
329 	bool is_hw_crypto_enabled;
330 };
331 #define MWL8K_VIF(_vif) ((struct mwl8k_vif *)&((_vif)->drv_priv))
332 #define IEEE80211_KEY_CONF(_u8) ((struct ieee80211_key_conf *)(_u8))
333 
334 struct tx_traffic_info {
335 	u32 start_time;
336 	u32 pkts;
337 };
338 
339 #define MWL8K_MAX_TID 8
340 struct mwl8k_sta {
341 	/* Index into station database. Returned by UPDATE_STADB.  */
342 	u8 peer_id;
343 	u8 is_ampdu_allowed;
344 	struct tx_traffic_info tx_stats[MWL8K_MAX_TID];
345 };
346 #define MWL8K_STA(_sta) ((struct mwl8k_sta *)&((_sta)->drv_priv))
347 
348 static const struct ieee80211_channel mwl8k_channels_24[] = {
349 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2412, .hw_value = 1, },
350 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2417, .hw_value = 2, },
351 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2422, .hw_value = 3, },
352 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2427, .hw_value = 4, },
353 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2432, .hw_value = 5, },
354 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2437, .hw_value = 6, },
355 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2442, .hw_value = 7, },
356 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2447, .hw_value = 8, },
357 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2452, .hw_value = 9, },
358 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2457, .hw_value = 10, },
359 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2462, .hw_value = 11, },
360 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2467, .hw_value = 12, },
361 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2472, .hw_value = 13, },
362 	{ .band = NL80211_BAND_2GHZ, .center_freq = 2484, .hw_value = 14, },
363 };
364 
365 static const struct ieee80211_rate mwl8k_rates_24[] = {
366 	{ .bitrate = 10, .hw_value = 2, },
367 	{ .bitrate = 20, .hw_value = 4, },
368 	{ .bitrate = 55, .hw_value = 11, },
369 	{ .bitrate = 110, .hw_value = 22, },
370 	{ .bitrate = 220, .hw_value = 44, },
371 	{ .bitrate = 60, .hw_value = 12, },
372 	{ .bitrate = 90, .hw_value = 18, },
373 	{ .bitrate = 120, .hw_value = 24, },
374 	{ .bitrate = 180, .hw_value = 36, },
375 	{ .bitrate = 240, .hw_value = 48, },
376 	{ .bitrate = 360, .hw_value = 72, },
377 	{ .bitrate = 480, .hw_value = 96, },
378 	{ .bitrate = 540, .hw_value = 108, },
379 };
380 
381 static const struct ieee80211_channel mwl8k_channels_50[] = {
382 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5180, .hw_value = 36, },
383 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5200, .hw_value = 40, },
384 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5220, .hw_value = 44, },
385 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5240, .hw_value = 48, },
386 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5745, .hw_value = 149, },
387 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5765, .hw_value = 153, },
388 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5785, .hw_value = 157, },
389 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5805, .hw_value = 161, },
390 	{ .band = NL80211_BAND_5GHZ, .center_freq = 5825, .hw_value = 165, },
391 };
392 
393 static const struct ieee80211_rate mwl8k_rates_50[] = {
394 	{ .bitrate = 60, .hw_value = 12, },
395 	{ .bitrate = 90, .hw_value = 18, },
396 	{ .bitrate = 120, .hw_value = 24, },
397 	{ .bitrate = 180, .hw_value = 36, },
398 	{ .bitrate = 240, .hw_value = 48, },
399 	{ .bitrate = 360, .hw_value = 72, },
400 	{ .bitrate = 480, .hw_value = 96, },
401 	{ .bitrate = 540, .hw_value = 108, },
402 };
403 
404 /* Set or get info from Firmware */
405 #define MWL8K_CMD_GET			0x0000
406 #define MWL8K_CMD_SET			0x0001
407 #define MWL8K_CMD_SET_LIST		0x0002
408 
409 /* Firmware command codes */
410 #define MWL8K_CMD_CODE_DNLD		0x0001
411 #define MWL8K_CMD_GET_HW_SPEC		0x0003
412 #define MWL8K_CMD_SET_HW_SPEC		0x0004
413 #define MWL8K_CMD_MAC_MULTICAST_ADR	0x0010
414 #define MWL8K_CMD_GET_STAT		0x0014
415 #define MWL8K_CMD_BBP_REG_ACCESS	0x001a
416 #define MWL8K_CMD_RADIO_CONTROL		0x001c
417 #define MWL8K_CMD_RF_TX_POWER		0x001e
418 #define MWL8K_CMD_TX_POWER		0x001f
419 #define MWL8K_CMD_RF_ANTENNA		0x0020
420 #define MWL8K_CMD_SET_BEACON		0x0100		/* per-vif */
421 #define MWL8K_CMD_SET_PRE_SCAN		0x0107
422 #define MWL8K_CMD_SET_POST_SCAN		0x0108
423 #define MWL8K_CMD_SET_RF_CHANNEL	0x010a
424 #define MWL8K_CMD_SET_AID		0x010d
425 #define MWL8K_CMD_SET_RATE		0x0110
426 #define MWL8K_CMD_SET_FINALIZE_JOIN	0x0111
427 #define MWL8K_CMD_RTS_THRESHOLD		0x0113
428 #define MWL8K_CMD_SET_SLOT		0x0114
429 #define MWL8K_CMD_SET_EDCA_PARAMS	0x0115
430 #define MWL8K_CMD_SET_WMM_MODE		0x0123
431 #define MWL8K_CMD_MIMO_CONFIG		0x0125
432 #define MWL8K_CMD_USE_FIXED_RATE	0x0126
433 #define MWL8K_CMD_ENABLE_SNIFFER	0x0150
434 #define MWL8K_CMD_SET_MAC_ADDR		0x0202		/* per-vif */
435 #define MWL8K_CMD_SET_RATEADAPT_MODE	0x0203
436 #define MWL8K_CMD_GET_WATCHDOG_BITMAP	0x0205
437 #define MWL8K_CMD_DEL_MAC_ADDR		0x0206		/* per-vif */
438 #define MWL8K_CMD_BSS_START		0x1100		/* per-vif */
439 #define MWL8K_CMD_SET_NEW_STN		0x1111		/* per-vif */
440 #define MWL8K_CMD_UPDATE_ENCRYPTION	0x1122		/* per-vif */
441 #define MWL8K_CMD_UPDATE_STADB		0x1123
442 #define MWL8K_CMD_BASTREAM		0x1125
443 
444 #define MWL8K_LEGACY_5G_RATE_OFFSET \
445 	(ARRAY_SIZE(mwl8k_rates_24) - ARRAY_SIZE(mwl8k_rates_50))
446 
447 static const char *mwl8k_cmd_name(__le16 cmd, char *buf, int bufsize)
448 {
449 	u16 command = le16_to_cpu(cmd);
450 
451 #define MWL8K_CMDNAME(x)	case MWL8K_CMD_##x: do {\
452 					snprintf(buf, bufsize, "%s", #x);\
453 					return buf;\
454 					} while (0)
455 	switch (command & ~0x8000) {
456 		MWL8K_CMDNAME(CODE_DNLD);
457 		MWL8K_CMDNAME(GET_HW_SPEC);
458 		MWL8K_CMDNAME(SET_HW_SPEC);
459 		MWL8K_CMDNAME(MAC_MULTICAST_ADR);
460 		MWL8K_CMDNAME(GET_STAT);
461 		MWL8K_CMDNAME(RADIO_CONTROL);
462 		MWL8K_CMDNAME(RF_TX_POWER);
463 		MWL8K_CMDNAME(TX_POWER);
464 		MWL8K_CMDNAME(RF_ANTENNA);
465 		MWL8K_CMDNAME(SET_BEACON);
466 		MWL8K_CMDNAME(SET_PRE_SCAN);
467 		MWL8K_CMDNAME(SET_POST_SCAN);
468 		MWL8K_CMDNAME(SET_RF_CHANNEL);
469 		MWL8K_CMDNAME(SET_AID);
470 		MWL8K_CMDNAME(SET_RATE);
471 		MWL8K_CMDNAME(SET_FINALIZE_JOIN);
472 		MWL8K_CMDNAME(RTS_THRESHOLD);
473 		MWL8K_CMDNAME(SET_SLOT);
474 		MWL8K_CMDNAME(SET_EDCA_PARAMS);
475 		MWL8K_CMDNAME(SET_WMM_MODE);
476 		MWL8K_CMDNAME(MIMO_CONFIG);
477 		MWL8K_CMDNAME(USE_FIXED_RATE);
478 		MWL8K_CMDNAME(ENABLE_SNIFFER);
479 		MWL8K_CMDNAME(SET_MAC_ADDR);
480 		MWL8K_CMDNAME(SET_RATEADAPT_MODE);
481 		MWL8K_CMDNAME(BSS_START);
482 		MWL8K_CMDNAME(SET_NEW_STN);
483 		MWL8K_CMDNAME(UPDATE_ENCRYPTION);
484 		MWL8K_CMDNAME(UPDATE_STADB);
485 		MWL8K_CMDNAME(BASTREAM);
486 		MWL8K_CMDNAME(GET_WATCHDOG_BITMAP);
487 	default:
488 		snprintf(buf, bufsize, "0x%x", cmd);
489 	}
490 #undef MWL8K_CMDNAME
491 
492 	return buf;
493 }
494 
495 /* Hardware and firmware reset */
496 static void mwl8k_hw_reset(struct mwl8k_priv *priv)
497 {
498 	iowrite32(MWL8K_H2A_INT_RESET,
499 		priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
500 	iowrite32(MWL8K_H2A_INT_RESET,
501 		priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
502 	msleep(20);
503 }
504 
505 /* Release fw image */
506 static void mwl8k_release_fw(const struct firmware **fw)
507 {
508 	if (*fw == NULL)
509 		return;
510 	release_firmware(*fw);
511 	*fw = NULL;
512 }
513 
514 static void mwl8k_release_firmware(struct mwl8k_priv *priv)
515 {
516 	mwl8k_release_fw(&priv->fw_ucode);
517 	mwl8k_release_fw(&priv->fw_helper);
518 }
519 
520 /* states for asynchronous f/w loading */
521 static void mwl8k_fw_state_machine(const struct firmware *fw, void *context);
522 enum {
523 	FW_STATE_INIT = 0,
524 	FW_STATE_LOADING_PREF,
525 	FW_STATE_LOADING_ALT,
526 	FW_STATE_ERROR,
527 };
528 
529 /* Request fw image */
530 static int mwl8k_request_fw(struct mwl8k_priv *priv,
531 			    const char *fname, const struct firmware **fw,
532 			    bool nowait)
533 {
534 	/* release current image */
535 	if (*fw != NULL)
536 		mwl8k_release_fw(fw);
537 
538 	if (nowait)
539 		return request_firmware_nowait(THIS_MODULE, 1, fname,
540 					       &priv->pdev->dev, GFP_KERNEL,
541 					       priv, mwl8k_fw_state_machine);
542 	else
543 		return request_firmware(fw, fname, &priv->pdev->dev);
544 }
545 
546 static int mwl8k_request_firmware(struct mwl8k_priv *priv, char *fw_image,
547 				  bool nowait)
548 {
549 	struct mwl8k_device_info *di = priv->device_info;
550 	int rc;
551 
552 	if (di->helper_image != NULL) {
553 		if (nowait)
554 			rc = mwl8k_request_fw(priv, di->helper_image,
555 					      &priv->fw_helper, true);
556 		else
557 			rc = mwl8k_request_fw(priv, di->helper_image,
558 					      &priv->fw_helper, false);
559 		if (rc)
560 			printk(KERN_ERR "%s: Error requesting helper fw %s\n",
561 			       pci_name(priv->pdev), di->helper_image);
562 
563 		if (rc || nowait)
564 			return rc;
565 	}
566 
567 	if (nowait) {
568 		/*
569 		 * if we get here, no helper image is needed.  Skip the
570 		 * FW_STATE_INIT state.
571 		 */
572 		priv->fw_state = FW_STATE_LOADING_PREF;
573 		rc = mwl8k_request_fw(priv, fw_image,
574 				      &priv->fw_ucode,
575 				      true);
576 	} else
577 		rc = mwl8k_request_fw(priv, fw_image,
578 				      &priv->fw_ucode, false);
579 	if (rc) {
580 		printk(KERN_ERR "%s: Error requesting firmware file %s\n",
581 		       pci_name(priv->pdev), fw_image);
582 		mwl8k_release_fw(&priv->fw_helper);
583 		return rc;
584 	}
585 
586 	return 0;
587 }
588 
589 struct mwl8k_cmd_pkt {
590 	__le16	code;
591 	__le16	length;
592 	__u8	seq_num;
593 	__u8	macid;
594 	__le16	result;
595 	char	payload[];
596 } __packed;
597 
598 /*
599  * Firmware loading.
600  */
601 static int
602 mwl8k_send_fw_load_cmd(struct mwl8k_priv *priv, void *data, int length)
603 {
604 	void __iomem *regs = priv->regs;
605 	dma_addr_t dma_addr;
606 	int loops;
607 
608 	dma_addr = dma_map_single(&priv->pdev->dev, data, length,
609 				  DMA_TO_DEVICE);
610 	if (dma_mapping_error(&priv->pdev->dev, dma_addr))
611 		return -ENOMEM;
612 
613 	iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
614 	iowrite32(0, regs + MWL8K_HIU_INT_CODE);
615 	iowrite32(MWL8K_H2A_INT_DOORBELL,
616 		regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
617 	iowrite32(MWL8K_H2A_INT_DUMMY,
618 		regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
619 
620 	loops = 1000;
621 	do {
622 		u32 int_code;
623 		if (priv->is_8764) {
624 			int_code = ioread32(regs +
625 					    MWL8K_HIU_H2A_INTERRUPT_STATUS);
626 			if (int_code == 0)
627 				break;
628 		} else {
629 			int_code = ioread32(regs + MWL8K_HIU_INT_CODE);
630 			if (int_code == MWL8K_INT_CODE_CMD_FINISHED) {
631 				iowrite32(0, regs + MWL8K_HIU_INT_CODE);
632 				break;
633 			}
634 		}
635 		cond_resched();
636 		udelay(1);
637 	} while (--loops);
638 
639 	dma_unmap_single(&priv->pdev->dev, dma_addr, length, DMA_TO_DEVICE);
640 
641 	return loops ? 0 : -ETIMEDOUT;
642 }
643 
644 static int mwl8k_load_fw_image(struct mwl8k_priv *priv,
645 				const u8 *data, size_t length)
646 {
647 	struct mwl8k_cmd_pkt *cmd;
648 	int done;
649 	int rc = 0;
650 
651 	cmd = kmalloc(sizeof(*cmd) + 256, GFP_KERNEL);
652 	if (cmd == NULL)
653 		return -ENOMEM;
654 
655 	cmd->code = cpu_to_le16(MWL8K_CMD_CODE_DNLD);
656 	cmd->seq_num = 0;
657 	cmd->macid = 0;
658 	cmd->result = 0;
659 
660 	done = 0;
661 	while (length) {
662 		int block_size = length > 256 ? 256 : length;
663 
664 		memcpy(cmd->payload, data + done, block_size);
665 		cmd->length = cpu_to_le16(block_size);
666 
667 		rc = mwl8k_send_fw_load_cmd(priv, cmd,
668 						sizeof(*cmd) + block_size);
669 		if (rc)
670 			break;
671 
672 		done += block_size;
673 		length -= block_size;
674 	}
675 
676 	if (!rc) {
677 		cmd->length = 0;
678 		rc = mwl8k_send_fw_load_cmd(priv, cmd, sizeof(*cmd));
679 	}
680 
681 	kfree(cmd);
682 
683 	return rc;
684 }
685 
686 static int mwl8k_feed_fw_image(struct mwl8k_priv *priv,
687 				const u8 *data, size_t length)
688 {
689 	unsigned char *buffer;
690 	int may_continue, rc = 0;
691 	u32 done, prev_block_size;
692 
693 	buffer = kmalloc(1024, GFP_KERNEL);
694 	if (buffer == NULL)
695 		return -ENOMEM;
696 
697 	done = 0;
698 	prev_block_size = 0;
699 	may_continue = 1000;
700 	while (may_continue > 0) {
701 		u32 block_size;
702 
703 		block_size = ioread32(priv->regs + MWL8K_HIU_SCRATCH);
704 		if (block_size & 1) {
705 			block_size &= ~1;
706 			may_continue--;
707 		} else {
708 			done += prev_block_size;
709 			length -= prev_block_size;
710 		}
711 
712 		if (block_size > 1024 || block_size > length) {
713 			rc = -EOVERFLOW;
714 			break;
715 		}
716 
717 		if (length == 0) {
718 			rc = 0;
719 			break;
720 		}
721 
722 		if (block_size == 0) {
723 			rc = -EPROTO;
724 			may_continue--;
725 			udelay(1);
726 			continue;
727 		}
728 
729 		prev_block_size = block_size;
730 		memcpy(buffer, data + done, block_size);
731 
732 		rc = mwl8k_send_fw_load_cmd(priv, buffer, block_size);
733 		if (rc)
734 			break;
735 	}
736 
737 	if (!rc && length != 0)
738 		rc = -EREMOTEIO;
739 
740 	kfree(buffer);
741 
742 	return rc;
743 }
744 
745 static int mwl8k_load_firmware(struct ieee80211_hw *hw)
746 {
747 	struct mwl8k_priv *priv = hw->priv;
748 	const struct firmware *fw = priv->fw_ucode;
749 	int rc;
750 	int loops;
751 
752 	if (!memcmp(fw->data, "\x01\x00\x00\x00", 4) && !priv->is_8764) {
753 		const struct firmware *helper = priv->fw_helper;
754 
755 		if (helper == NULL) {
756 			printk(KERN_ERR "%s: helper image needed but none "
757 			       "given\n", pci_name(priv->pdev));
758 			return -EINVAL;
759 		}
760 
761 		rc = mwl8k_load_fw_image(priv, helper->data, helper->size);
762 		if (rc) {
763 			printk(KERN_ERR "%s: unable to load firmware "
764 			       "helper image\n", pci_name(priv->pdev));
765 			return rc;
766 		}
767 		msleep(20);
768 
769 		rc = mwl8k_feed_fw_image(priv, fw->data, fw->size);
770 	} else {
771 		if (priv->is_8764)
772 			rc = mwl8k_feed_fw_image(priv, fw->data, fw->size);
773 		else
774 			rc = mwl8k_load_fw_image(priv, fw->data, fw->size);
775 	}
776 
777 	if (rc) {
778 		printk(KERN_ERR "%s: unable to load firmware image\n",
779 		       pci_name(priv->pdev));
780 		return rc;
781 	}
782 
783 	iowrite32(MWL8K_MODE_STA, priv->regs + MWL8K_HIU_GEN_PTR);
784 
785 	loops = 500000;
786 	do {
787 		u32 ready_code;
788 
789 		ready_code = ioread32(priv->regs + MWL8K_HIU_INT_CODE);
790 		if (ready_code == MWL8K_FWAP_READY) {
791 			priv->ap_fw = true;
792 			break;
793 		} else if (ready_code == MWL8K_FWSTA_READY) {
794 			priv->ap_fw = false;
795 			break;
796 		}
797 
798 		cond_resched();
799 		udelay(1);
800 	} while (--loops);
801 
802 	return loops ? 0 : -ETIMEDOUT;
803 }
804 
805 
806 /* DMA header used by firmware and hardware.  */
807 struct mwl8k_dma_data {
808 	__le16 fwlen;
809 	struct ieee80211_hdr wh;
810 	char data[];
811 } __packed __aligned(2);
812 
813 /* Routines to add/remove DMA header from skb.  */
814 static inline void mwl8k_remove_dma_header(struct sk_buff *skb, __le16 qos)
815 {
816 	struct mwl8k_dma_data *tr;
817 	int hdrlen;
818 
819 	tr = (struct mwl8k_dma_data *)skb->data;
820 	hdrlen = ieee80211_hdrlen(tr->wh.frame_control);
821 
822 	if (hdrlen != sizeof(tr->wh)) {
823 		if (ieee80211_is_data_qos(tr->wh.frame_control)) {
824 			memmove(tr->data - hdrlen, &tr->wh, hdrlen - 2);
825 			*((__le16 *)(tr->data - 2)) = qos;
826 		} else {
827 			memmove(tr->data - hdrlen, &tr->wh, hdrlen);
828 		}
829 	}
830 
831 	if (hdrlen != sizeof(*tr))
832 		skb_pull(skb, sizeof(*tr) - hdrlen);
833 }
834 
835 #define REDUCED_TX_HEADROOM	8
836 
837 static void
838 mwl8k_add_dma_header(struct mwl8k_priv *priv, struct sk_buff *skb,
839 						int head_pad, int tail_pad)
840 {
841 	struct ieee80211_hdr *wh;
842 	int hdrlen;
843 	int reqd_hdrlen;
844 	struct mwl8k_dma_data *tr;
845 
846 	/*
847 	 * Add a firmware DMA header; the firmware requires that we
848 	 * present a 2-byte payload length followed by a 4-address
849 	 * header (without QoS field), followed (optionally) by any
850 	 * WEP/ExtIV header (but only filled in for CCMP).
851 	 */
852 	wh = (struct ieee80211_hdr *)skb->data;
853 
854 	hdrlen = ieee80211_hdrlen(wh->frame_control);
855 
856 	/*
857 	 * Check if skb_resize is required because of
858 	 * tx_headroom adjustment.
859 	 */
860 	if (priv->ap_fw && (hdrlen < (sizeof(struct ieee80211_cts)
861 						+ REDUCED_TX_HEADROOM))) {
862 		if (pskb_expand_head(skb, REDUCED_TX_HEADROOM, 0, GFP_ATOMIC)) {
863 
864 			wiphy_err(priv->hw->wiphy,
865 					"Failed to reallocate TX buffer\n");
866 			return;
867 		}
868 		skb->truesize += REDUCED_TX_HEADROOM;
869 	}
870 
871 	reqd_hdrlen = sizeof(*tr) + head_pad;
872 
873 	if (hdrlen != reqd_hdrlen)
874 		skb_push(skb, reqd_hdrlen - hdrlen);
875 
876 	if (ieee80211_is_data_qos(wh->frame_control))
877 		hdrlen -= IEEE80211_QOS_CTL_LEN;
878 
879 	tr = (struct mwl8k_dma_data *)skb->data;
880 	if (wh != &tr->wh)
881 		memmove(&tr->wh, wh, hdrlen);
882 	if (hdrlen != sizeof(tr->wh))
883 		memset(((void *)&tr->wh) + hdrlen, 0, sizeof(tr->wh) - hdrlen);
884 
885 	/*
886 	 * Firmware length is the length of the fully formed "802.11
887 	 * payload".  That is, everything except for the 802.11 header.
888 	 * This includes all crypto material including the MIC.
889 	 */
890 	tr->fwlen = cpu_to_le16(skb->len - sizeof(*tr) + tail_pad);
891 }
892 
893 static void mwl8k_encapsulate_tx_frame(struct mwl8k_priv *priv,
894 		struct sk_buff *skb)
895 {
896 	struct ieee80211_hdr *wh;
897 	struct ieee80211_tx_info *tx_info;
898 	struct ieee80211_key_conf *key_conf;
899 	int data_pad;
900 	int head_pad = 0;
901 
902 	wh = (struct ieee80211_hdr *)skb->data;
903 
904 	tx_info = IEEE80211_SKB_CB(skb);
905 
906 	key_conf = NULL;
907 	if (ieee80211_is_data(wh->frame_control))
908 		key_conf = tx_info->control.hw_key;
909 
910 	/*
911 	 * Make sure the packet header is in the DMA header format (4-address
912 	 * without QoS), and add head & tail padding when HW crypto is enabled.
913 	 *
914 	 * We have the following trailer padding requirements:
915 	 * - WEP: 4 trailer bytes (ICV)
916 	 * - TKIP: 12 trailer bytes (8 MIC + 4 ICV)
917 	 * - CCMP: 8 trailer bytes (MIC)
918 	 */
919 	data_pad = 0;
920 	if (key_conf != NULL) {
921 		head_pad = key_conf->iv_len;
922 		switch (key_conf->cipher) {
923 		case WLAN_CIPHER_SUITE_WEP40:
924 		case WLAN_CIPHER_SUITE_WEP104:
925 			data_pad = 4;
926 			break;
927 		case WLAN_CIPHER_SUITE_TKIP:
928 			data_pad = 12;
929 			break;
930 		case WLAN_CIPHER_SUITE_CCMP:
931 			data_pad = 8;
932 			break;
933 		}
934 	}
935 	mwl8k_add_dma_header(priv, skb, head_pad, data_pad);
936 }
937 
938 /*
939  * Packet reception for 88w8366/88w8764 AP firmware.
940  */
941 struct mwl8k_rxd_ap {
942 	__le16 pkt_len;
943 	__u8 sq2;
944 	__u8 rate;
945 	__le32 pkt_phys_addr;
946 	__le32 next_rxd_phys_addr;
947 	__le16 qos_control;
948 	__le16 htsig2;
949 	__le32 hw_rssi_info;
950 	__le32 hw_noise_floor_info;
951 	__u8 noise_floor;
952 	__u8 pad0[3];
953 	__u8 rssi;
954 	__u8 rx_status;
955 	__u8 channel;
956 	__u8 rx_ctrl;
957 } __packed;
958 
959 #define MWL8K_AP_RATE_INFO_MCS_FORMAT		0x80
960 #define MWL8K_AP_RATE_INFO_40MHZ		0x40
961 #define MWL8K_AP_RATE_INFO_RATEID(x)		((x) & 0x3f)
962 
963 #define MWL8K_AP_RX_CTRL_OWNED_BY_HOST		0x80
964 
965 /* 8366/8764 AP rx_status bits */
966 #define MWL8K_AP_RXSTAT_DECRYPT_ERR_MASK		0x80
967 #define MWL8K_AP_RXSTAT_GENERAL_DECRYPT_ERR		0xFF
968 #define MWL8K_AP_RXSTAT_TKIP_DECRYPT_MIC_ERR		0x02
969 #define MWL8K_AP_RXSTAT_WEP_DECRYPT_ICV_ERR		0x04
970 #define MWL8K_AP_RXSTAT_TKIP_DECRYPT_ICV_ERR		0x08
971 
972 static void mwl8k_rxd_ap_init(void *_rxd, dma_addr_t next_dma_addr)
973 {
974 	struct mwl8k_rxd_ap *rxd = _rxd;
975 
976 	rxd->next_rxd_phys_addr = cpu_to_le32(next_dma_addr);
977 	rxd->rx_ctrl = MWL8K_AP_RX_CTRL_OWNED_BY_HOST;
978 }
979 
980 static void mwl8k_rxd_ap_refill(void *_rxd, dma_addr_t addr, int len)
981 {
982 	struct mwl8k_rxd_ap *rxd = _rxd;
983 
984 	rxd->pkt_len = cpu_to_le16(len);
985 	rxd->pkt_phys_addr = cpu_to_le32(addr);
986 	wmb();
987 	rxd->rx_ctrl = 0;
988 }
989 
990 static int
991 mwl8k_rxd_ap_process(void *_rxd, struct ieee80211_rx_status *status,
992 		     __le16 *qos, s8 *noise)
993 {
994 	struct mwl8k_rxd_ap *rxd = _rxd;
995 
996 	if (!(rxd->rx_ctrl & MWL8K_AP_RX_CTRL_OWNED_BY_HOST))
997 		return -1;
998 	rmb();
999 
1000 	memset(status, 0, sizeof(*status));
1001 
1002 	status->signal = -rxd->rssi;
1003 	*noise = -rxd->noise_floor;
1004 
1005 	if (rxd->rate & MWL8K_AP_RATE_INFO_MCS_FORMAT) {
1006 		status->encoding = RX_ENC_HT;
1007 		if (rxd->rate & MWL8K_AP_RATE_INFO_40MHZ)
1008 			status->bw = RATE_INFO_BW_40;
1009 		status->rate_idx = MWL8K_AP_RATE_INFO_RATEID(rxd->rate);
1010 	} else {
1011 		int i;
1012 
1013 		for (i = 0; i < ARRAY_SIZE(mwl8k_rates_24); i++) {
1014 			if (mwl8k_rates_24[i].hw_value == rxd->rate) {
1015 				status->rate_idx = i;
1016 				break;
1017 			}
1018 		}
1019 	}
1020 
1021 	if (rxd->channel > 14) {
1022 		status->band = NL80211_BAND_5GHZ;
1023 		if (!(status->encoding == RX_ENC_HT) &&
1024 		    status->rate_idx >= MWL8K_LEGACY_5G_RATE_OFFSET)
1025 			status->rate_idx -= MWL8K_LEGACY_5G_RATE_OFFSET;
1026 	} else {
1027 		status->band = NL80211_BAND_2GHZ;
1028 	}
1029 	status->freq = ieee80211_channel_to_frequency(rxd->channel,
1030 						      status->band);
1031 
1032 	*qos = rxd->qos_control;
1033 
1034 	if ((rxd->rx_status != MWL8K_AP_RXSTAT_GENERAL_DECRYPT_ERR) &&
1035 	    (rxd->rx_status & MWL8K_AP_RXSTAT_DECRYPT_ERR_MASK) &&
1036 	    (rxd->rx_status & MWL8K_AP_RXSTAT_TKIP_DECRYPT_MIC_ERR))
1037 		status->flag |= RX_FLAG_MMIC_ERROR;
1038 
1039 	return le16_to_cpu(rxd->pkt_len);
1040 }
1041 
1042 static struct rxd_ops rxd_ap_ops = {
1043 	.rxd_size	= sizeof(struct mwl8k_rxd_ap),
1044 	.rxd_init	= mwl8k_rxd_ap_init,
1045 	.rxd_refill	= mwl8k_rxd_ap_refill,
1046 	.rxd_process	= mwl8k_rxd_ap_process,
1047 };
1048 
1049 /*
1050  * Packet reception for STA firmware.
1051  */
1052 struct mwl8k_rxd_sta {
1053 	__le16 pkt_len;
1054 	__u8 link_quality;
1055 	__u8 noise_level;
1056 	__le32 pkt_phys_addr;
1057 	__le32 next_rxd_phys_addr;
1058 	__le16 qos_control;
1059 	__le16 rate_info;
1060 	__le32 pad0[4];
1061 	__u8 rssi;
1062 	__u8 channel;
1063 	__le16 pad1;
1064 	__u8 rx_ctrl;
1065 	__u8 rx_status;
1066 	__u8 pad2[2];
1067 } __packed;
1068 
1069 #define MWL8K_STA_RATE_INFO_SHORTPRE		0x8000
1070 #define MWL8K_STA_RATE_INFO_ANTSELECT(x)	(((x) >> 11) & 0x3)
1071 #define MWL8K_STA_RATE_INFO_RATEID(x)		(((x) >> 3) & 0x3f)
1072 #define MWL8K_STA_RATE_INFO_40MHZ		0x0004
1073 #define MWL8K_STA_RATE_INFO_SHORTGI		0x0002
1074 #define MWL8K_STA_RATE_INFO_MCS_FORMAT		0x0001
1075 
1076 #define MWL8K_STA_RX_CTRL_OWNED_BY_HOST		0x02
1077 #define MWL8K_STA_RX_CTRL_DECRYPT_ERROR		0x04
1078 /* ICV=0 or MIC=1 */
1079 #define MWL8K_STA_RX_CTRL_DEC_ERR_TYPE		0x08
1080 /* Key is uploaded only in failure case */
1081 #define MWL8K_STA_RX_CTRL_KEY_INDEX			0x30
1082 
1083 static void mwl8k_rxd_sta_init(void *_rxd, dma_addr_t next_dma_addr)
1084 {
1085 	struct mwl8k_rxd_sta *rxd = _rxd;
1086 
1087 	rxd->next_rxd_phys_addr = cpu_to_le32(next_dma_addr);
1088 	rxd->rx_ctrl = MWL8K_STA_RX_CTRL_OWNED_BY_HOST;
1089 }
1090 
1091 static void mwl8k_rxd_sta_refill(void *_rxd, dma_addr_t addr, int len)
1092 {
1093 	struct mwl8k_rxd_sta *rxd = _rxd;
1094 
1095 	rxd->pkt_len = cpu_to_le16(len);
1096 	rxd->pkt_phys_addr = cpu_to_le32(addr);
1097 	wmb();
1098 	rxd->rx_ctrl = 0;
1099 }
1100 
1101 static int
1102 mwl8k_rxd_sta_process(void *_rxd, struct ieee80211_rx_status *status,
1103 		       __le16 *qos, s8 *noise)
1104 {
1105 	struct mwl8k_rxd_sta *rxd = _rxd;
1106 	u16 rate_info;
1107 
1108 	if (!(rxd->rx_ctrl & MWL8K_STA_RX_CTRL_OWNED_BY_HOST))
1109 		return -1;
1110 	rmb();
1111 
1112 	rate_info = le16_to_cpu(rxd->rate_info);
1113 
1114 	memset(status, 0, sizeof(*status));
1115 
1116 	status->signal = -rxd->rssi;
1117 	*noise = -rxd->noise_level;
1118 	status->antenna = MWL8K_STA_RATE_INFO_ANTSELECT(rate_info);
1119 	status->rate_idx = MWL8K_STA_RATE_INFO_RATEID(rate_info);
1120 
1121 	if (rate_info & MWL8K_STA_RATE_INFO_SHORTPRE)
1122 		status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
1123 	if (rate_info & MWL8K_STA_RATE_INFO_40MHZ)
1124 		status->bw = RATE_INFO_BW_40;
1125 	if (rate_info & MWL8K_STA_RATE_INFO_SHORTGI)
1126 		status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
1127 	if (rate_info & MWL8K_STA_RATE_INFO_MCS_FORMAT)
1128 		status->encoding = RX_ENC_HT;
1129 
1130 	if (rxd->channel > 14) {
1131 		status->band = NL80211_BAND_5GHZ;
1132 		if (!(status->encoding == RX_ENC_HT) &&
1133 		    status->rate_idx >= MWL8K_LEGACY_5G_RATE_OFFSET)
1134 			status->rate_idx -= MWL8K_LEGACY_5G_RATE_OFFSET;
1135 	} else {
1136 		status->band = NL80211_BAND_2GHZ;
1137 	}
1138 	status->freq = ieee80211_channel_to_frequency(rxd->channel,
1139 						      status->band);
1140 
1141 	*qos = rxd->qos_control;
1142 	if ((rxd->rx_ctrl & MWL8K_STA_RX_CTRL_DECRYPT_ERROR) &&
1143 	    (rxd->rx_ctrl & MWL8K_STA_RX_CTRL_DEC_ERR_TYPE))
1144 		status->flag |= RX_FLAG_MMIC_ERROR;
1145 
1146 	return le16_to_cpu(rxd->pkt_len);
1147 }
1148 
1149 static struct rxd_ops rxd_sta_ops = {
1150 	.rxd_size	= sizeof(struct mwl8k_rxd_sta),
1151 	.rxd_init	= mwl8k_rxd_sta_init,
1152 	.rxd_refill	= mwl8k_rxd_sta_refill,
1153 	.rxd_process	= mwl8k_rxd_sta_process,
1154 };
1155 
1156 
1157 #define MWL8K_RX_DESCS		256
1158 #define MWL8K_RX_MAXSZ		3800
1159 
1160 static int mwl8k_rxq_init(struct ieee80211_hw *hw, int index)
1161 {
1162 	struct mwl8k_priv *priv = hw->priv;
1163 	struct mwl8k_rx_queue *rxq = priv->rxq + index;
1164 	int size;
1165 	int i;
1166 
1167 	rxq->rxd_count = 0;
1168 	rxq->head = 0;
1169 	rxq->tail = 0;
1170 
1171 	size = MWL8K_RX_DESCS * priv->rxd_ops->rxd_size;
1172 
1173 	rxq->rxd = dma_alloc_coherent(&priv->pdev->dev, size, &rxq->rxd_dma,
1174 				      GFP_KERNEL);
1175 	if (rxq->rxd == NULL) {
1176 		wiphy_err(hw->wiphy, "failed to alloc RX descriptors\n");
1177 		return -ENOMEM;
1178 	}
1179 
1180 	rxq->buf = kcalloc(MWL8K_RX_DESCS, sizeof(*rxq->buf), GFP_KERNEL);
1181 	if (rxq->buf == NULL) {
1182 		dma_free_coherent(&priv->pdev->dev, size, rxq->rxd,
1183 				  rxq->rxd_dma);
1184 		return -ENOMEM;
1185 	}
1186 
1187 	for (i = 0; i < MWL8K_RX_DESCS; i++) {
1188 		int desc_size;
1189 		void *rxd;
1190 		int nexti;
1191 		dma_addr_t next_dma_addr;
1192 
1193 		desc_size = priv->rxd_ops->rxd_size;
1194 		rxd = rxq->rxd + (i * priv->rxd_ops->rxd_size);
1195 
1196 		nexti = i + 1;
1197 		if (nexti == MWL8K_RX_DESCS)
1198 			nexti = 0;
1199 		next_dma_addr = rxq->rxd_dma + (nexti * desc_size);
1200 
1201 		priv->rxd_ops->rxd_init(rxd, next_dma_addr);
1202 	}
1203 
1204 	return 0;
1205 }
1206 
1207 static int rxq_refill(struct ieee80211_hw *hw, int index, int limit)
1208 {
1209 	struct mwl8k_priv *priv = hw->priv;
1210 	struct mwl8k_rx_queue *rxq = priv->rxq + index;
1211 	int refilled = 0;
1212 
1213 	while (rxq->rxd_count < MWL8K_RX_DESCS && limit--) {
1214 		struct sk_buff *skb;
1215 		dma_addr_t addr;
1216 		int rx;
1217 		void *rxd;
1218 
1219 		skb = dev_alloc_skb(MWL8K_RX_MAXSZ);
1220 		if (skb == NULL)
1221 			break;
1222 
1223 		addr = dma_map_single(&priv->pdev->dev, skb->data,
1224 				      MWL8K_RX_MAXSZ, DMA_FROM_DEVICE);
1225 
1226 		rxq->rxd_count++;
1227 		rx = rxq->tail++;
1228 		if (rxq->tail == MWL8K_RX_DESCS)
1229 			rxq->tail = 0;
1230 		rxq->buf[rx].skb = skb;
1231 		dma_unmap_addr_set(&rxq->buf[rx], dma, addr);
1232 
1233 		rxd = rxq->rxd + (rx * priv->rxd_ops->rxd_size);
1234 		priv->rxd_ops->rxd_refill(rxd, addr, MWL8K_RX_MAXSZ);
1235 
1236 		refilled++;
1237 	}
1238 
1239 	return refilled;
1240 }
1241 
1242 /* Must be called only when the card's reception is completely halted */
1243 static void mwl8k_rxq_deinit(struct ieee80211_hw *hw, int index)
1244 {
1245 	struct mwl8k_priv *priv = hw->priv;
1246 	struct mwl8k_rx_queue *rxq = priv->rxq + index;
1247 	int i;
1248 
1249 	if (rxq->rxd == NULL)
1250 		return;
1251 
1252 	for (i = 0; i < MWL8K_RX_DESCS; i++) {
1253 		if (rxq->buf[i].skb != NULL) {
1254 			dma_unmap_single(&priv->pdev->dev,
1255 					 dma_unmap_addr(&rxq->buf[i], dma),
1256 					 MWL8K_RX_MAXSZ, DMA_FROM_DEVICE);
1257 			dma_unmap_addr_set(&rxq->buf[i], dma, 0);
1258 
1259 			kfree_skb(rxq->buf[i].skb);
1260 			rxq->buf[i].skb = NULL;
1261 		}
1262 	}
1263 
1264 	kfree(rxq->buf);
1265 	rxq->buf = NULL;
1266 
1267 	dma_free_coherent(&priv->pdev->dev,
1268 			  MWL8K_RX_DESCS * priv->rxd_ops->rxd_size, rxq->rxd,
1269 			  rxq->rxd_dma);
1270 	rxq->rxd = NULL;
1271 }
1272 
1273 
1274 /*
1275  * Scan a list of BSSIDs to process for finalize join.
1276  * Allows for extension to process multiple BSSIDs.
1277  */
1278 static inline int
1279 mwl8k_capture_bssid(struct mwl8k_priv *priv, struct ieee80211_hdr *wh)
1280 {
1281 	return priv->capture_beacon &&
1282 		ieee80211_is_beacon(wh->frame_control) &&
1283 		ether_addr_equal_64bits(wh->addr3, priv->capture_bssid);
1284 }
1285 
1286 static inline void mwl8k_save_beacon(struct ieee80211_hw *hw,
1287 				     struct sk_buff *skb)
1288 {
1289 	struct mwl8k_priv *priv = hw->priv;
1290 
1291 	priv->capture_beacon = false;
1292 	eth_zero_addr(priv->capture_bssid);
1293 
1294 	/*
1295 	 * Use GFP_ATOMIC as rxq_process is called from
1296 	 * the primary interrupt handler, memory allocation call
1297 	 * must not sleep.
1298 	 */
1299 	priv->beacon_skb = skb_copy(skb, GFP_ATOMIC);
1300 	if (priv->beacon_skb != NULL)
1301 		ieee80211_queue_work(hw, &priv->finalize_join_worker);
1302 }
1303 
1304 static inline struct mwl8k_vif *mwl8k_find_vif_bss(struct list_head *vif_list,
1305 						   u8 *bssid)
1306 {
1307 	struct mwl8k_vif *mwl8k_vif;
1308 
1309 	list_for_each_entry(mwl8k_vif,
1310 			    vif_list, list) {
1311 		if (memcmp(bssid, mwl8k_vif->bssid,
1312 			   ETH_ALEN) == 0)
1313 			return mwl8k_vif;
1314 	}
1315 
1316 	return NULL;
1317 }
1318 
1319 static int rxq_process(struct ieee80211_hw *hw, int index, int limit)
1320 {
1321 	struct mwl8k_priv *priv = hw->priv;
1322 	struct mwl8k_vif *mwl8k_vif = NULL;
1323 	struct mwl8k_rx_queue *rxq = priv->rxq + index;
1324 	int processed;
1325 
1326 	processed = 0;
1327 	while (rxq->rxd_count && limit--) {
1328 		struct sk_buff *skb;
1329 		void *rxd;
1330 		int pkt_len;
1331 		struct ieee80211_rx_status status;
1332 		struct ieee80211_hdr *wh;
1333 		__le16 qos;
1334 
1335 		skb = rxq->buf[rxq->head].skb;
1336 		if (skb == NULL)
1337 			break;
1338 
1339 		rxd = rxq->rxd + (rxq->head * priv->rxd_ops->rxd_size);
1340 
1341 		pkt_len = priv->rxd_ops->rxd_process(rxd, &status, &qos,
1342 							&priv->noise);
1343 		if (pkt_len < 0)
1344 			break;
1345 
1346 		rxq->buf[rxq->head].skb = NULL;
1347 
1348 		dma_unmap_single(&priv->pdev->dev,
1349 				 dma_unmap_addr(&rxq->buf[rxq->head], dma),
1350 				 MWL8K_RX_MAXSZ, DMA_FROM_DEVICE);
1351 		dma_unmap_addr_set(&rxq->buf[rxq->head], dma, 0);
1352 
1353 		rxq->head++;
1354 		if (rxq->head == MWL8K_RX_DESCS)
1355 			rxq->head = 0;
1356 
1357 		rxq->rxd_count--;
1358 
1359 		wh = &((struct mwl8k_dma_data *)skb->data)->wh;
1360 
1361 		/*
1362 		 * Check for a pending join operation.  Save a
1363 		 * copy of the beacon and schedule a tasklet to
1364 		 * send a FINALIZE_JOIN command to the firmware.
1365 		 */
1366 		if (mwl8k_capture_bssid(priv, (void *)skb->data))
1367 			mwl8k_save_beacon(hw, skb);
1368 
1369 		if (ieee80211_has_protected(wh->frame_control)) {
1370 
1371 			/* Check if hw crypto has been enabled for
1372 			 * this bss. If yes, set the status flags
1373 			 * accordingly
1374 			 */
1375 			mwl8k_vif = mwl8k_find_vif_bss(&priv->vif_list,
1376 								wh->addr1);
1377 
1378 			if (mwl8k_vif != NULL &&
1379 			    mwl8k_vif->is_hw_crypto_enabled) {
1380 				/*
1381 				 * When MMIC ERROR is encountered
1382 				 * by the firmware, payload is
1383 				 * dropped and only 32 bytes of
1384 				 * mwl8k Firmware header is sent
1385 				 * to the host.
1386 				 *
1387 				 * We need to add four bytes of
1388 				 * key information.  In it
1389 				 * MAC80211 expects keyidx set to
1390 				 * 0 for triggering Counter
1391 				 * Measure of MMIC failure.
1392 				 */
1393 				if (status.flag & RX_FLAG_MMIC_ERROR) {
1394 					struct mwl8k_dma_data *tr;
1395 					tr = (struct mwl8k_dma_data *)skb->data;
1396 					memset((void *)&(tr->data), 0, 4);
1397 					pkt_len += 4;
1398 				}
1399 
1400 				if (!ieee80211_is_auth(wh->frame_control))
1401 					status.flag |= RX_FLAG_IV_STRIPPED |
1402 						       RX_FLAG_DECRYPTED |
1403 						       RX_FLAG_MMIC_STRIPPED;
1404 			}
1405 		}
1406 
1407 		skb_put(skb, pkt_len);
1408 		mwl8k_remove_dma_header(skb, qos);
1409 		memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
1410 		ieee80211_rx_irqsafe(hw, skb);
1411 
1412 		processed++;
1413 	}
1414 
1415 	return processed;
1416 }
1417 
1418 
1419 /*
1420  * Packet transmission.
1421  */
1422 
1423 #define MWL8K_TXD_STATUS_OK			0x00000001
1424 #define MWL8K_TXD_STATUS_OK_RETRY		0x00000002
1425 #define MWL8K_TXD_STATUS_OK_MORE_RETRY		0x00000004
1426 #define MWL8K_TXD_STATUS_MULTICAST_TX		0x00000008
1427 #define MWL8K_TXD_STATUS_FW_OWNED		0x80000000
1428 
1429 #define MWL8K_QOS_QLEN_UNSPEC			0xff00
1430 #define MWL8K_QOS_ACK_POLICY_MASK		0x0060
1431 #define MWL8K_QOS_ACK_POLICY_NORMAL		0x0000
1432 #define MWL8K_QOS_ACK_POLICY_BLOCKACK		0x0060
1433 #define MWL8K_QOS_EOSP				0x0010
1434 
1435 struct mwl8k_tx_desc {
1436 	__le32 status;
1437 	__u8 data_rate;
1438 	__u8 tx_priority;
1439 	__le16 qos_control;
1440 	__le32 pkt_phys_addr;
1441 	__le16 pkt_len;
1442 	__u8 dest_MAC_addr[ETH_ALEN];
1443 	__le32 next_txd_phys_addr;
1444 	__le32 timestamp;
1445 	__le16 rate_info;
1446 	__u8 peer_id;
1447 	__u8 tx_frag_cnt;
1448 } __packed;
1449 
1450 #define MWL8K_TX_DESCS		128
1451 
1452 static int mwl8k_txq_init(struct ieee80211_hw *hw, int index)
1453 {
1454 	struct mwl8k_priv *priv = hw->priv;
1455 	struct mwl8k_tx_queue *txq = priv->txq + index;
1456 	int size;
1457 	int i;
1458 
1459 	txq->len = 0;
1460 	txq->head = 0;
1461 	txq->tail = 0;
1462 
1463 	size = MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc);
1464 
1465 	txq->txd = dma_alloc_coherent(&priv->pdev->dev, size, &txq->txd_dma,
1466 				      GFP_KERNEL);
1467 	if (txq->txd == NULL) {
1468 		wiphy_err(hw->wiphy, "failed to alloc TX descriptors\n");
1469 		return -ENOMEM;
1470 	}
1471 
1472 	txq->skb = kcalloc(MWL8K_TX_DESCS, sizeof(*txq->skb), GFP_KERNEL);
1473 	if (txq->skb == NULL) {
1474 		dma_free_coherent(&priv->pdev->dev, size, txq->txd,
1475 				  txq->txd_dma);
1476 		txq->txd = NULL;
1477 		return -ENOMEM;
1478 	}
1479 
1480 	for (i = 0; i < MWL8K_TX_DESCS; i++) {
1481 		struct mwl8k_tx_desc *tx_desc;
1482 		int nexti;
1483 
1484 		tx_desc = txq->txd + i;
1485 		nexti = (i + 1) % MWL8K_TX_DESCS;
1486 
1487 		tx_desc->status = 0;
1488 		tx_desc->next_txd_phys_addr =
1489 			cpu_to_le32(txq->txd_dma + nexti * sizeof(*tx_desc));
1490 	}
1491 
1492 	return 0;
1493 }
1494 
1495 static inline void mwl8k_tx_start(struct mwl8k_priv *priv)
1496 {
1497 	iowrite32(MWL8K_H2A_INT_PPA_READY,
1498 		priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
1499 	iowrite32(MWL8K_H2A_INT_DUMMY,
1500 		priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
1501 	ioread32(priv->regs + MWL8K_HIU_INT_CODE);
1502 }
1503 
1504 static void mwl8k_dump_tx_rings(struct ieee80211_hw *hw)
1505 {
1506 	struct mwl8k_priv *priv = hw->priv;
1507 	int i;
1508 
1509 	for (i = 0; i < mwl8k_tx_queues(priv); i++) {
1510 		struct mwl8k_tx_queue *txq = priv->txq + i;
1511 		int fw_owned = 0;
1512 		int drv_owned = 0;
1513 		int unused = 0;
1514 		int desc;
1515 
1516 		for (desc = 0; desc < MWL8K_TX_DESCS; desc++) {
1517 			struct mwl8k_tx_desc *tx_desc = txq->txd + desc;
1518 			u32 status;
1519 
1520 			status = le32_to_cpu(tx_desc->status);
1521 			if (status & MWL8K_TXD_STATUS_FW_OWNED)
1522 				fw_owned++;
1523 			else
1524 				drv_owned++;
1525 
1526 			if (tx_desc->pkt_len == 0)
1527 				unused++;
1528 		}
1529 
1530 		wiphy_err(hw->wiphy,
1531 			  "txq[%d] len=%d head=%d tail=%d "
1532 			  "fw_owned=%d drv_owned=%d unused=%d\n",
1533 			  i,
1534 			  txq->len, txq->head, txq->tail,
1535 			  fw_owned, drv_owned, unused);
1536 	}
1537 }
1538 
1539 /*
1540  * Must be called with priv->fw_mutex held and tx queues stopped.
1541  */
1542 #define MWL8K_TX_WAIT_TIMEOUT_MS	5000
1543 
1544 static int mwl8k_tx_wait_empty(struct ieee80211_hw *hw)
1545 {
1546 	struct mwl8k_priv *priv = hw->priv;
1547 	DECLARE_COMPLETION_ONSTACK(tx_wait);
1548 	int retry;
1549 	int rc;
1550 
1551 	might_sleep();
1552 
1553 	/* Since fw restart is in progress, allow only the firmware
1554 	 * commands from the restart code and block the other
1555 	 * commands since they are going to fail in any case since
1556 	 * the firmware has crashed
1557 	 */
1558 	if (priv->hw_restart_in_progress) {
1559 		if (priv->hw_restart_owner == current)
1560 			return 0;
1561 		else
1562 			return -EBUSY;
1563 	}
1564 
1565 	if (atomic_read(&priv->watchdog_event_pending))
1566 		return 0;
1567 
1568 	/*
1569 	 * The TX queues are stopped at this point, so this test
1570 	 * doesn't need to take ->tx_lock.
1571 	 */
1572 	if (!priv->pending_tx_pkts)
1573 		return 0;
1574 
1575 	retry = 1;
1576 	rc = 0;
1577 
1578 	spin_lock_bh(&priv->tx_lock);
1579 	priv->tx_wait = &tx_wait;
1580 	while (!rc) {
1581 		int oldcount;
1582 		unsigned long timeout;
1583 
1584 		oldcount = priv->pending_tx_pkts;
1585 
1586 		spin_unlock_bh(&priv->tx_lock);
1587 		timeout = wait_for_completion_timeout(&tx_wait,
1588 			    msecs_to_jiffies(MWL8K_TX_WAIT_TIMEOUT_MS));
1589 
1590 		if (atomic_read(&priv->watchdog_event_pending)) {
1591 			spin_lock_bh(&priv->tx_lock);
1592 			priv->tx_wait = NULL;
1593 			spin_unlock_bh(&priv->tx_lock);
1594 			return 0;
1595 		}
1596 
1597 		spin_lock_bh(&priv->tx_lock);
1598 
1599 		if (timeout || !priv->pending_tx_pkts) {
1600 			WARN_ON(priv->pending_tx_pkts);
1601 			if (retry)
1602 				wiphy_notice(hw->wiphy, "tx rings drained\n");
1603 			break;
1604 		}
1605 
1606 		if (retry) {
1607 			mwl8k_tx_start(priv);
1608 			retry = 0;
1609 			continue;
1610 		}
1611 
1612 		if (priv->pending_tx_pkts < oldcount) {
1613 			wiphy_notice(hw->wiphy,
1614 				     "waiting for tx rings to drain (%d -> %d pkts)\n",
1615 				     oldcount, priv->pending_tx_pkts);
1616 			retry = 1;
1617 			continue;
1618 		}
1619 
1620 		priv->tx_wait = NULL;
1621 
1622 		wiphy_err(hw->wiphy, "tx rings stuck for %d ms\n",
1623 			  MWL8K_TX_WAIT_TIMEOUT_MS);
1624 		mwl8k_dump_tx_rings(hw);
1625 		priv->hw_restart_in_progress = true;
1626 		ieee80211_queue_work(hw, &priv->fw_reload);
1627 
1628 		rc = -ETIMEDOUT;
1629 	}
1630 	priv->tx_wait = NULL;
1631 	spin_unlock_bh(&priv->tx_lock);
1632 
1633 	return rc;
1634 }
1635 
1636 #define MWL8K_TXD_SUCCESS(status)				\
1637 	((status) & (MWL8K_TXD_STATUS_OK |			\
1638 		     MWL8K_TXD_STATUS_OK_RETRY |		\
1639 		     MWL8K_TXD_STATUS_OK_MORE_RETRY))
1640 
1641 static int mwl8k_tid_queue_mapping(u8 tid)
1642 {
1643 	BUG_ON(tid > 7);
1644 
1645 	switch (tid) {
1646 	case 0:
1647 	case 3:
1648 		return IEEE80211_AC_BE;
1649 	case 1:
1650 	case 2:
1651 		return IEEE80211_AC_BK;
1652 	case 4:
1653 	case 5:
1654 		return IEEE80211_AC_VI;
1655 	case 6:
1656 	case 7:
1657 		return IEEE80211_AC_VO;
1658 	default:
1659 		return -1;
1660 	}
1661 }
1662 
1663 /* The firmware will fill in the rate information
1664  * for each packet that gets queued in the hardware
1665  * and these macros will interpret that info.
1666  */
1667 
1668 #define RI_FORMAT(a)		  (a & 0x0001)
1669 #define RI_RATE_ID_MCS(a)	 ((a & 0x01f8) >> 3)
1670 
1671 static int
1672 mwl8k_txq_reclaim(struct ieee80211_hw *hw, int index, int limit, int force)
1673 {
1674 	struct mwl8k_priv *priv = hw->priv;
1675 	struct mwl8k_tx_queue *txq = priv->txq + index;
1676 	int processed;
1677 
1678 	processed = 0;
1679 	while (txq->len > 0 && limit--) {
1680 		int tx;
1681 		struct mwl8k_tx_desc *tx_desc;
1682 		unsigned long addr;
1683 		int size;
1684 		struct sk_buff *skb;
1685 		struct ieee80211_tx_info *info;
1686 		u32 status;
1687 		struct ieee80211_sta *sta;
1688 		struct mwl8k_sta *sta_info = NULL;
1689 		u16 rate_info;
1690 		struct ieee80211_hdr *wh;
1691 
1692 		tx = txq->head;
1693 		tx_desc = txq->txd + tx;
1694 
1695 		status = le32_to_cpu(tx_desc->status);
1696 
1697 		if (status & MWL8K_TXD_STATUS_FW_OWNED) {
1698 			if (!force)
1699 				break;
1700 			tx_desc->status &=
1701 				~cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED);
1702 		}
1703 
1704 		txq->head = (tx + 1) % MWL8K_TX_DESCS;
1705 		BUG_ON(txq->len == 0);
1706 		txq->len--;
1707 		priv->pending_tx_pkts--;
1708 
1709 		addr = le32_to_cpu(tx_desc->pkt_phys_addr);
1710 		size = le16_to_cpu(tx_desc->pkt_len);
1711 		skb = txq->skb[tx];
1712 		txq->skb[tx] = NULL;
1713 
1714 		BUG_ON(skb == NULL);
1715 		dma_unmap_single(&priv->pdev->dev, addr, size, DMA_TO_DEVICE);
1716 
1717 		mwl8k_remove_dma_header(skb, tx_desc->qos_control);
1718 
1719 		wh = (struct ieee80211_hdr *) skb->data;
1720 
1721 		/* Mark descriptor as unused */
1722 		tx_desc->pkt_phys_addr = 0;
1723 		tx_desc->pkt_len = 0;
1724 
1725 		info = IEEE80211_SKB_CB(skb);
1726 		if (ieee80211_is_data(wh->frame_control)) {
1727 			rcu_read_lock();
1728 			sta = ieee80211_find_sta_by_ifaddr(hw, wh->addr1,
1729 							   wh->addr2);
1730 			if (sta) {
1731 				sta_info = MWL8K_STA(sta);
1732 				BUG_ON(sta_info == NULL);
1733 				rate_info = le16_to_cpu(tx_desc->rate_info);
1734 				/* If rate is < 6.5 Mpbs for an ht station
1735 				 * do not form an ampdu. If the station is a
1736 				 * legacy station (format = 0), do not form an
1737 				 * ampdu
1738 				 */
1739 				if (RI_RATE_ID_MCS(rate_info) < 1 ||
1740 				    RI_FORMAT(rate_info) == 0) {
1741 					sta_info->is_ampdu_allowed = false;
1742 				} else {
1743 					sta_info->is_ampdu_allowed = true;
1744 				}
1745 			}
1746 			rcu_read_unlock();
1747 		}
1748 
1749 		ieee80211_tx_info_clear_status(info);
1750 
1751 		/* Rate control is happening in the firmware.
1752 		 * Ensure no tx rate is being reported.
1753 		 */
1754 		info->status.rates[0].idx = -1;
1755 		info->status.rates[0].count = 1;
1756 
1757 		if (MWL8K_TXD_SUCCESS(status))
1758 			info->flags |= IEEE80211_TX_STAT_ACK;
1759 
1760 		ieee80211_tx_status_irqsafe(hw, skb);
1761 
1762 		processed++;
1763 	}
1764 
1765 	return processed;
1766 }
1767 
1768 /* must be called only when the card's transmit is completely halted */
1769 static void mwl8k_txq_deinit(struct ieee80211_hw *hw, int index)
1770 {
1771 	struct mwl8k_priv *priv = hw->priv;
1772 	struct mwl8k_tx_queue *txq = priv->txq + index;
1773 
1774 	if (txq->txd == NULL)
1775 		return;
1776 
1777 	mwl8k_txq_reclaim(hw, index, INT_MAX, 1);
1778 
1779 	kfree(txq->skb);
1780 	txq->skb = NULL;
1781 
1782 	dma_free_coherent(&priv->pdev->dev,
1783 			  MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc),
1784 			  txq->txd, txq->txd_dma);
1785 	txq->txd = NULL;
1786 }
1787 
1788 /* caller must hold priv->stream_lock when calling the stream functions */
1789 static struct mwl8k_ampdu_stream *
1790 mwl8k_add_stream(struct ieee80211_hw *hw, struct ieee80211_sta *sta, u8 tid)
1791 {
1792 	struct mwl8k_ampdu_stream *stream;
1793 	struct mwl8k_priv *priv = hw->priv;
1794 	int i;
1795 
1796 	for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
1797 		stream = &priv->ampdu[i];
1798 		if (stream->state == AMPDU_NO_STREAM) {
1799 			stream->sta = sta;
1800 			stream->state = AMPDU_STREAM_NEW;
1801 			stream->tid = tid;
1802 			stream->idx = i;
1803 			wiphy_debug(hw->wiphy, "Added a new stream for %pM %d",
1804 				    sta->addr, tid);
1805 			return stream;
1806 		}
1807 	}
1808 	return NULL;
1809 }
1810 
1811 static int
1812 mwl8k_start_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream)
1813 {
1814 	int ret;
1815 
1816 	/* if the stream has already been started, don't start it again */
1817 	if (stream->state != AMPDU_STREAM_NEW)
1818 		return 0;
1819 	ret = ieee80211_start_tx_ba_session(stream->sta, stream->tid, 0);
1820 	if (ret)
1821 		wiphy_debug(hw->wiphy, "Failed to start stream for %pM %d: "
1822 			    "%d\n", stream->sta->addr, stream->tid, ret);
1823 	else
1824 		wiphy_debug(hw->wiphy, "Started stream for %pM %d\n",
1825 			    stream->sta->addr, stream->tid);
1826 	return ret;
1827 }
1828 
1829 static void
1830 mwl8k_remove_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream)
1831 {
1832 	wiphy_debug(hw->wiphy, "Remove stream for %pM %d\n", stream->sta->addr,
1833 		    stream->tid);
1834 	memset(stream, 0, sizeof(*stream));
1835 }
1836 
1837 static struct mwl8k_ampdu_stream *
1838 mwl8k_lookup_stream(struct ieee80211_hw *hw, u8 *addr, u8 tid)
1839 {
1840 	struct mwl8k_priv *priv = hw->priv;
1841 	int i;
1842 
1843 	for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
1844 		struct mwl8k_ampdu_stream *stream;
1845 		stream = &priv->ampdu[i];
1846 		if (stream->state == AMPDU_NO_STREAM)
1847 			continue;
1848 		if (!memcmp(stream->sta->addr, addr, ETH_ALEN) &&
1849 		    stream->tid == tid)
1850 			return stream;
1851 	}
1852 	return NULL;
1853 }
1854 
1855 #define MWL8K_AMPDU_PACKET_THRESHOLD 64
1856 static inline bool mwl8k_ampdu_allowed(struct ieee80211_sta *sta, u8 tid)
1857 {
1858 	struct mwl8k_sta *sta_info = MWL8K_STA(sta);
1859 	struct tx_traffic_info *tx_stats;
1860 
1861 	BUG_ON(tid >= MWL8K_MAX_TID);
1862 	tx_stats = &sta_info->tx_stats[tid];
1863 
1864 	return sta_info->is_ampdu_allowed &&
1865 		tx_stats->pkts > MWL8K_AMPDU_PACKET_THRESHOLD;
1866 }
1867 
1868 static inline void mwl8k_tx_count_packet(struct ieee80211_sta *sta, u8 tid)
1869 {
1870 	struct mwl8k_sta *sta_info = MWL8K_STA(sta);
1871 	struct tx_traffic_info *tx_stats;
1872 
1873 	BUG_ON(tid >= MWL8K_MAX_TID);
1874 	tx_stats = &sta_info->tx_stats[tid];
1875 
1876 	if (tx_stats->start_time == 0)
1877 		tx_stats->start_time = jiffies;
1878 
1879 	/* reset the packet count after each second elapses.  If the number of
1880 	 * packets ever exceeds the ampdu_min_traffic threshold, we will allow
1881 	 * an ampdu stream to be started.
1882 	 */
1883 	if (time_after(jiffies, (unsigned long)tx_stats->start_time + HZ)) {
1884 		tx_stats->pkts = 0;
1885 		tx_stats->start_time = 0;
1886 	} else
1887 		tx_stats->pkts++;
1888 }
1889 
1890 /* The hardware ampdu queues start from 5.
1891  * txpriorities for ampdu queues are
1892  * 5 6 7 0 1 2 3 4 ie., queue 5 is highest
1893  * and queue 3 is lowest (queue 4 is reserved)
1894  */
1895 #define BA_QUEUE		5
1896 
1897 static void
1898 mwl8k_txq_xmit(struct ieee80211_hw *hw,
1899 	       int index,
1900 	       struct ieee80211_sta *sta,
1901 	       struct sk_buff *skb)
1902 {
1903 	struct mwl8k_priv *priv = hw->priv;
1904 	struct ieee80211_tx_info *tx_info;
1905 	struct mwl8k_vif *mwl8k_vif;
1906 	struct ieee80211_hdr *wh;
1907 	struct mwl8k_tx_queue *txq;
1908 	struct mwl8k_tx_desc *tx;
1909 	dma_addr_t dma;
1910 	u32 txstatus;
1911 	u8 txdatarate;
1912 	u16 qos;
1913 	int txpriority;
1914 	u8 tid = 0;
1915 	struct mwl8k_ampdu_stream *stream = NULL;
1916 	bool start_ba_session = false;
1917 	bool mgmtframe = false;
1918 	struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
1919 	bool eapol_frame = false;
1920 
1921 	wh = (struct ieee80211_hdr *)skb->data;
1922 	if (ieee80211_is_data_qos(wh->frame_control))
1923 		qos = le16_to_cpu(*((__le16 *)ieee80211_get_qos_ctl(wh)));
1924 	else
1925 		qos = 0;
1926 
1927 	if (skb->protocol == cpu_to_be16(ETH_P_PAE))
1928 		eapol_frame = true;
1929 
1930 	if (ieee80211_is_mgmt(wh->frame_control))
1931 		mgmtframe = true;
1932 
1933 	if (priv->ap_fw)
1934 		mwl8k_encapsulate_tx_frame(priv, skb);
1935 	else
1936 		mwl8k_add_dma_header(priv, skb, 0, 0);
1937 
1938 	wh = &((struct mwl8k_dma_data *)skb->data)->wh;
1939 
1940 	tx_info = IEEE80211_SKB_CB(skb);
1941 	mwl8k_vif = MWL8K_VIF(tx_info->control.vif);
1942 
1943 	if (tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1944 		wh->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1945 		wh->seq_ctrl |= cpu_to_le16(mwl8k_vif->seqno);
1946 		mwl8k_vif->seqno += 0x10;
1947 	}
1948 
1949 	/* Setup firmware control bit fields for each frame type.  */
1950 	txstatus = 0;
1951 	txdatarate = 0;
1952 	if (ieee80211_is_mgmt(wh->frame_control) ||
1953 	    ieee80211_is_ctl(wh->frame_control)) {
1954 		txdatarate = 0;
1955 		qos |= MWL8K_QOS_QLEN_UNSPEC | MWL8K_QOS_EOSP;
1956 	} else if (ieee80211_is_data(wh->frame_control)) {
1957 		txdatarate = 1;
1958 		if (is_multicast_ether_addr(wh->addr1))
1959 			txstatus |= MWL8K_TXD_STATUS_MULTICAST_TX;
1960 
1961 		qos &= ~MWL8K_QOS_ACK_POLICY_MASK;
1962 		if (tx_info->flags & IEEE80211_TX_CTL_AMPDU)
1963 			qos |= MWL8K_QOS_ACK_POLICY_BLOCKACK;
1964 		else
1965 			qos |= MWL8K_QOS_ACK_POLICY_NORMAL;
1966 	}
1967 
1968 	/* Queue ADDBA request in the respective data queue.  While setting up
1969 	 * the ampdu stream, mac80211 queues further packets for that
1970 	 * particular ra/tid pair.  However, packets piled up in the hardware
1971 	 * for that ra/tid pair will still go out. ADDBA request and the
1972 	 * related data packets going out from different queues asynchronously
1973 	 * will cause a shift in the receiver window which might result in
1974 	 * ampdu packets getting dropped at the receiver after the stream has
1975 	 * been setup.
1976 	 */
1977 	if (unlikely(ieee80211_is_action(wh->frame_control) &&
1978 	    mgmt->u.action.category == WLAN_CATEGORY_BACK &&
1979 	    mgmt->u.action.u.addba_req.action_code == WLAN_ACTION_ADDBA_REQ &&
1980 	    priv->ap_fw)) {
1981 		u16 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1982 		tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1983 		index = mwl8k_tid_queue_mapping(tid);
1984 	}
1985 
1986 	txpriority = index;
1987 
1988 	if (priv->ap_fw && sta && sta->deflink.ht_cap.ht_supported && !eapol_frame &&
1989 	    ieee80211_is_data_qos(wh->frame_control)) {
1990 		tid = qos & 0xf;
1991 		mwl8k_tx_count_packet(sta, tid);
1992 		spin_lock(&priv->stream_lock);
1993 		stream = mwl8k_lookup_stream(hw, sta->addr, tid);
1994 		if (stream != NULL) {
1995 			if (stream->state == AMPDU_STREAM_ACTIVE) {
1996 				WARN_ON(!(qos & MWL8K_QOS_ACK_POLICY_BLOCKACK));
1997 				txpriority = (BA_QUEUE + stream->idx) %
1998 					     TOTAL_HW_TX_QUEUES;
1999 				if (stream->idx <= 1)
2000 					index = stream->idx +
2001 						MWL8K_TX_WMM_QUEUES;
2002 
2003 			} else if (stream->state == AMPDU_STREAM_NEW) {
2004 				/* We get here if the driver sends us packets
2005 				 * after we've initiated a stream, but before
2006 				 * our ampdu_action routine has been called
2007 				 * with IEEE80211_AMPDU_TX_START to get the SSN
2008 				 * for the ADDBA request.  So this packet can
2009 				 * go out with no risk of sequence number
2010 				 * mismatch.  No special handling is required.
2011 				 */
2012 			} else {
2013 				/* Drop packets that would go out after the
2014 				 * ADDBA request was sent but before the ADDBA
2015 				 * response is received.  If we don't do this,
2016 				 * the recipient would probably receive it
2017 				 * after the ADDBA request with SSN 0.  This
2018 				 * will cause the recipient's BA receive window
2019 				 * to shift, which would cause the subsequent
2020 				 * packets in the BA stream to be discarded.
2021 				 * mac80211 queues our packets for us in this
2022 				 * case, so this is really just a safety check.
2023 				 */
2024 				wiphy_warn(hw->wiphy,
2025 					   "Cannot send packet while ADDBA "
2026 					   "dialog is underway.\n");
2027 				spin_unlock(&priv->stream_lock);
2028 				dev_kfree_skb(skb);
2029 				return;
2030 			}
2031 		} else {
2032 			/* Defer calling mwl8k_start_stream so that the current
2033 			 * skb can go out before the ADDBA request.  This
2034 			 * prevents sequence number mismatch at the recepient
2035 			 * as described above.
2036 			 */
2037 			if (mwl8k_ampdu_allowed(sta, tid)) {
2038 				stream = mwl8k_add_stream(hw, sta, tid);
2039 				if (stream != NULL)
2040 					start_ba_session = true;
2041 			}
2042 		}
2043 		spin_unlock(&priv->stream_lock);
2044 	} else {
2045 		qos &= ~MWL8K_QOS_ACK_POLICY_MASK;
2046 		qos |= MWL8K_QOS_ACK_POLICY_NORMAL;
2047 	}
2048 
2049 	dma = dma_map_single(&priv->pdev->dev, skb->data, skb->len,
2050 			     DMA_TO_DEVICE);
2051 
2052 	if (dma_mapping_error(&priv->pdev->dev, dma)) {
2053 		wiphy_debug(hw->wiphy,
2054 			    "failed to dma map skb, dropping TX frame.\n");
2055 		if (start_ba_session) {
2056 			spin_lock(&priv->stream_lock);
2057 			mwl8k_remove_stream(hw, stream);
2058 			spin_unlock(&priv->stream_lock);
2059 		}
2060 		dev_kfree_skb(skb);
2061 		return;
2062 	}
2063 
2064 	spin_lock_bh(&priv->tx_lock);
2065 
2066 	txq = priv->txq + index;
2067 
2068 	/* Mgmt frames that go out frequently are probe
2069 	 * responses. Other mgmt frames got out relatively
2070 	 * infrequently. Hence reserve 2 buffers so that
2071 	 * other mgmt frames do not get dropped due to an
2072 	 * already queued probe response in one of the
2073 	 * reserved buffers.
2074 	 */
2075 
2076 	if (txq->len >= MWL8K_TX_DESCS - 2) {
2077 		if (!mgmtframe || txq->len == MWL8K_TX_DESCS) {
2078 			if (start_ba_session) {
2079 				spin_lock(&priv->stream_lock);
2080 				mwl8k_remove_stream(hw, stream);
2081 				spin_unlock(&priv->stream_lock);
2082 			}
2083 			mwl8k_tx_start(priv);
2084 			spin_unlock_bh(&priv->tx_lock);
2085 			dma_unmap_single(&priv->pdev->dev, dma, skb->len,
2086 					 DMA_TO_DEVICE);
2087 			dev_kfree_skb(skb);
2088 			return;
2089 		}
2090 	}
2091 
2092 	BUG_ON(txq->skb[txq->tail] != NULL);
2093 	txq->skb[txq->tail] = skb;
2094 
2095 	tx = txq->txd + txq->tail;
2096 	tx->data_rate = txdatarate;
2097 	tx->tx_priority = txpriority;
2098 	tx->qos_control = cpu_to_le16(qos);
2099 	tx->pkt_phys_addr = cpu_to_le32(dma);
2100 	tx->pkt_len = cpu_to_le16(skb->len);
2101 	tx->rate_info = 0;
2102 	if (!priv->ap_fw && sta != NULL)
2103 		tx->peer_id = MWL8K_STA(sta)->peer_id;
2104 	else
2105 		tx->peer_id = 0;
2106 
2107 	if (priv->ap_fw && ieee80211_is_data(wh->frame_control) && !eapol_frame)
2108 		tx->timestamp = cpu_to_le32(ioread32(priv->regs +
2109 						MWL8K_HW_TIMER_REGISTER));
2110 	else
2111 		tx->timestamp = 0;
2112 
2113 	wmb();
2114 	tx->status = cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED | txstatus);
2115 
2116 	txq->len++;
2117 	priv->pending_tx_pkts++;
2118 
2119 	txq->tail++;
2120 	if (txq->tail == MWL8K_TX_DESCS)
2121 		txq->tail = 0;
2122 
2123 	mwl8k_tx_start(priv);
2124 
2125 	spin_unlock_bh(&priv->tx_lock);
2126 
2127 	/* Initiate the ampdu session here */
2128 	if (start_ba_session) {
2129 		spin_lock(&priv->stream_lock);
2130 		if (mwl8k_start_stream(hw, stream))
2131 			mwl8k_remove_stream(hw, stream);
2132 		spin_unlock(&priv->stream_lock);
2133 	}
2134 }
2135 
2136 
2137 /*
2138  * Firmware access.
2139  *
2140  * We have the following requirements for issuing firmware commands:
2141  * - Some commands require that the packet transmit path is idle when
2142  *   the command is issued.  (For simplicity, we'll just quiesce the
2143  *   transmit path for every command.)
2144  * - There are certain sequences of commands that need to be issued to
2145  *   the hardware sequentially, with no other intervening commands.
2146  *
2147  * This leads to an implementation of a "firmware lock" as a mutex that
2148  * can be taken recursively, and which is taken by both the low-level
2149  * command submission function (mwl8k_post_cmd) as well as any users of
2150  * that function that require issuing of an atomic sequence of commands,
2151  * and quiesces the transmit path whenever it's taken.
2152  */
2153 static int mwl8k_fw_lock(struct ieee80211_hw *hw)
2154 {
2155 	struct mwl8k_priv *priv = hw->priv;
2156 
2157 	if (priv->fw_mutex_owner != current) {
2158 		int rc;
2159 
2160 		mutex_lock(&priv->fw_mutex);
2161 		ieee80211_stop_queues(hw);
2162 
2163 		rc = mwl8k_tx_wait_empty(hw);
2164 		if (rc) {
2165 			if (!priv->hw_restart_in_progress)
2166 				ieee80211_wake_queues(hw);
2167 
2168 			mutex_unlock(&priv->fw_mutex);
2169 
2170 			return rc;
2171 		}
2172 
2173 		priv->fw_mutex_owner = current;
2174 	}
2175 
2176 	priv->fw_mutex_depth++;
2177 
2178 	return 0;
2179 }
2180 
2181 static void mwl8k_fw_unlock(struct ieee80211_hw *hw)
2182 {
2183 	struct mwl8k_priv *priv = hw->priv;
2184 
2185 	if (!--priv->fw_mutex_depth) {
2186 		if (!priv->hw_restart_in_progress)
2187 			ieee80211_wake_queues(hw);
2188 
2189 		priv->fw_mutex_owner = NULL;
2190 		mutex_unlock(&priv->fw_mutex);
2191 	}
2192 }
2193 
2194 static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable,
2195 			       u32 bitmap);
2196 
2197 /*
2198  * Command processing.
2199  */
2200 
2201 /* Timeout firmware commands after 10s */
2202 #define MWL8K_CMD_TIMEOUT_MS	10000
2203 
2204 static int mwl8k_post_cmd(struct ieee80211_hw *hw, struct mwl8k_cmd_pkt *cmd)
2205 {
2206 	DECLARE_COMPLETION_ONSTACK(cmd_wait);
2207 	struct mwl8k_priv *priv = hw->priv;
2208 	void __iomem *regs = priv->regs;
2209 	dma_addr_t dma_addr;
2210 	unsigned int dma_size;
2211 	int rc;
2212 	unsigned long timeout = 0;
2213 	u8 buf[32];
2214 	u32 bitmap = 0;
2215 
2216 	wiphy_dbg(hw->wiphy, "Posting %s [%d]\n",
2217 		  mwl8k_cmd_name(cmd->code, buf, sizeof(buf)), cmd->macid);
2218 
2219 	/* Before posting firmware commands that could change the hardware
2220 	 * characteristics, make sure that all BSSes are stopped temporary.
2221 	 * Enable these stopped BSSes after completion of the commands
2222 	 */
2223 
2224 	rc = mwl8k_fw_lock(hw);
2225 	if (rc)
2226 		return rc;
2227 
2228 	if (priv->ap_fw && priv->running_bsses) {
2229 		switch (le16_to_cpu(cmd->code)) {
2230 		case MWL8K_CMD_SET_RF_CHANNEL:
2231 		case MWL8K_CMD_RADIO_CONTROL:
2232 		case MWL8K_CMD_RF_TX_POWER:
2233 		case MWL8K_CMD_TX_POWER:
2234 		case MWL8K_CMD_RF_ANTENNA:
2235 		case MWL8K_CMD_RTS_THRESHOLD:
2236 		case MWL8K_CMD_MIMO_CONFIG:
2237 			bitmap = priv->running_bsses;
2238 			mwl8k_enable_bsses(hw, false, bitmap);
2239 			break;
2240 		}
2241 	}
2242 
2243 	cmd->result = (__force __le16) 0xffff;
2244 	dma_size = le16_to_cpu(cmd->length);
2245 	dma_addr = dma_map_single(&priv->pdev->dev, cmd, dma_size,
2246 				  DMA_BIDIRECTIONAL);
2247 	if (dma_mapping_error(&priv->pdev->dev, dma_addr)) {
2248 		rc = -ENOMEM;
2249 		goto exit;
2250 	}
2251 
2252 	priv->hostcmd_wait = &cmd_wait;
2253 	iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
2254 	iowrite32(MWL8K_H2A_INT_DOORBELL,
2255 		regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
2256 	iowrite32(MWL8K_H2A_INT_DUMMY,
2257 		regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
2258 
2259 	timeout = wait_for_completion_timeout(&cmd_wait,
2260 				msecs_to_jiffies(MWL8K_CMD_TIMEOUT_MS));
2261 
2262 	priv->hostcmd_wait = NULL;
2263 
2264 
2265 	dma_unmap_single(&priv->pdev->dev, dma_addr, dma_size,
2266 			 DMA_BIDIRECTIONAL);
2267 
2268 	if (!timeout) {
2269 		wiphy_err(hw->wiphy, "Command %s timeout after %u ms\n",
2270 			  mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
2271 			  MWL8K_CMD_TIMEOUT_MS);
2272 		rc = -ETIMEDOUT;
2273 	} else {
2274 		int ms;
2275 
2276 		ms = MWL8K_CMD_TIMEOUT_MS - jiffies_to_msecs(timeout);
2277 
2278 		rc = cmd->result ? -EINVAL : 0;
2279 		if (rc)
2280 			wiphy_err(hw->wiphy, "Command %s error 0x%x\n",
2281 				  mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
2282 				  le16_to_cpu(cmd->result));
2283 		else if (ms > 2000)
2284 			wiphy_notice(hw->wiphy, "Command %s took %d ms\n",
2285 				     mwl8k_cmd_name(cmd->code,
2286 						    buf, sizeof(buf)),
2287 				     ms);
2288 	}
2289 
2290 exit:
2291 	if (bitmap)
2292 		mwl8k_enable_bsses(hw, true, bitmap);
2293 
2294 	mwl8k_fw_unlock(hw);
2295 
2296 	return rc;
2297 }
2298 
2299 static int mwl8k_post_pervif_cmd(struct ieee80211_hw *hw,
2300 				 struct ieee80211_vif *vif,
2301 				 struct mwl8k_cmd_pkt *cmd)
2302 {
2303 	if (vif != NULL)
2304 		cmd->macid = MWL8K_VIF(vif)->macid;
2305 	return mwl8k_post_cmd(hw, cmd);
2306 }
2307 
2308 /*
2309  * Setup code shared between STA and AP firmware images.
2310  */
2311 static void mwl8k_setup_2ghz_band(struct ieee80211_hw *hw)
2312 {
2313 	struct mwl8k_priv *priv = hw->priv;
2314 
2315 	BUILD_BUG_ON(sizeof(priv->channels_24) != sizeof(mwl8k_channels_24));
2316 	memcpy(priv->channels_24, mwl8k_channels_24, sizeof(mwl8k_channels_24));
2317 
2318 	BUILD_BUG_ON(sizeof(priv->rates_24) != sizeof(mwl8k_rates_24));
2319 	memcpy(priv->rates_24, mwl8k_rates_24, sizeof(mwl8k_rates_24));
2320 
2321 	priv->band_24.band = NL80211_BAND_2GHZ;
2322 	priv->band_24.channels = priv->channels_24;
2323 	priv->band_24.n_channels = ARRAY_SIZE(mwl8k_channels_24);
2324 	priv->band_24.bitrates = priv->rates_24;
2325 	priv->band_24.n_bitrates = ARRAY_SIZE(mwl8k_rates_24);
2326 
2327 	hw->wiphy->bands[NL80211_BAND_2GHZ] = &priv->band_24;
2328 }
2329 
2330 static void mwl8k_setup_5ghz_band(struct ieee80211_hw *hw)
2331 {
2332 	struct mwl8k_priv *priv = hw->priv;
2333 
2334 	BUILD_BUG_ON(sizeof(priv->channels_50) != sizeof(mwl8k_channels_50));
2335 	memcpy(priv->channels_50, mwl8k_channels_50, sizeof(mwl8k_channels_50));
2336 
2337 	BUILD_BUG_ON(sizeof(priv->rates_50) != sizeof(mwl8k_rates_50));
2338 	memcpy(priv->rates_50, mwl8k_rates_50, sizeof(mwl8k_rates_50));
2339 
2340 	priv->band_50.band = NL80211_BAND_5GHZ;
2341 	priv->band_50.channels = priv->channels_50;
2342 	priv->band_50.n_channels = ARRAY_SIZE(mwl8k_channels_50);
2343 	priv->band_50.bitrates = priv->rates_50;
2344 	priv->band_50.n_bitrates = ARRAY_SIZE(mwl8k_rates_50);
2345 
2346 	hw->wiphy->bands[NL80211_BAND_5GHZ] = &priv->band_50;
2347 }
2348 
2349 /*
2350  * CMD_GET_HW_SPEC (STA version).
2351  */
2352 struct mwl8k_cmd_get_hw_spec_sta {
2353 	struct mwl8k_cmd_pkt header;
2354 	__u8 hw_rev;
2355 	__u8 host_interface;
2356 	__le16 num_mcaddrs;
2357 	__u8 perm_addr[ETH_ALEN];
2358 	__le16 region_code;
2359 	__le32 fw_rev;
2360 	__le32 ps_cookie;
2361 	__le32 caps;
2362 	__u8 mcs_bitmap[16];
2363 	__le32 rx_queue_ptr;
2364 	__le32 num_tx_queues;
2365 	__le32 tx_queue_ptrs[MWL8K_TX_WMM_QUEUES];
2366 	__le32 caps2;
2367 	__le32 num_tx_desc_per_queue;
2368 	__le32 total_rxd;
2369 } __packed;
2370 
2371 #define MWL8K_CAP_MAX_AMSDU		0x20000000
2372 #define MWL8K_CAP_GREENFIELD		0x08000000
2373 #define MWL8K_CAP_AMPDU			0x04000000
2374 #define MWL8K_CAP_RX_STBC		0x01000000
2375 #define MWL8K_CAP_TX_STBC		0x00800000
2376 #define MWL8K_CAP_SHORTGI_40MHZ		0x00400000
2377 #define MWL8K_CAP_SHORTGI_20MHZ		0x00200000
2378 #define MWL8K_CAP_RX_ANTENNA_MASK	0x000e0000
2379 #define MWL8K_CAP_TX_ANTENNA_MASK	0x0001c000
2380 #define MWL8K_CAP_DELAY_BA		0x00003000
2381 #define MWL8K_CAP_MIMO			0x00000200
2382 #define MWL8K_CAP_40MHZ			0x00000100
2383 #define MWL8K_CAP_BAND_MASK		0x00000007
2384 #define MWL8K_CAP_5GHZ			0x00000004
2385 #define MWL8K_CAP_2GHZ4			0x00000001
2386 
2387 static void
2388 mwl8k_set_ht_caps(struct ieee80211_hw *hw,
2389 		  struct ieee80211_supported_band *band, u32 cap)
2390 {
2391 	int rx_streams;
2392 	int tx_streams;
2393 
2394 	band->ht_cap.ht_supported = 1;
2395 
2396 	if (cap & MWL8K_CAP_MAX_AMSDU)
2397 		band->ht_cap.cap |= IEEE80211_HT_CAP_MAX_AMSDU;
2398 	if (cap & MWL8K_CAP_GREENFIELD)
2399 		band->ht_cap.cap |= IEEE80211_HT_CAP_GRN_FLD;
2400 	if (cap & MWL8K_CAP_AMPDU) {
2401 		ieee80211_hw_set(hw, AMPDU_AGGREGATION);
2402 		band->ht_cap.ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
2403 		band->ht_cap.ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE;
2404 	}
2405 	if (cap & MWL8K_CAP_RX_STBC)
2406 		band->ht_cap.cap |= IEEE80211_HT_CAP_RX_STBC;
2407 	if (cap & MWL8K_CAP_TX_STBC)
2408 		band->ht_cap.cap |= IEEE80211_HT_CAP_TX_STBC;
2409 	if (cap & MWL8K_CAP_SHORTGI_40MHZ)
2410 		band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_40;
2411 	if (cap & MWL8K_CAP_SHORTGI_20MHZ)
2412 		band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_20;
2413 	if (cap & MWL8K_CAP_DELAY_BA)
2414 		band->ht_cap.cap |= IEEE80211_HT_CAP_DELAY_BA;
2415 	if (cap & MWL8K_CAP_40MHZ)
2416 		band->ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2417 
2418 	rx_streams = hweight32(cap & MWL8K_CAP_RX_ANTENNA_MASK);
2419 	tx_streams = hweight32(cap & MWL8K_CAP_TX_ANTENNA_MASK);
2420 
2421 	band->ht_cap.mcs.rx_mask[0] = 0xff;
2422 	if (rx_streams >= 2)
2423 		band->ht_cap.mcs.rx_mask[1] = 0xff;
2424 	if (rx_streams >= 3)
2425 		band->ht_cap.mcs.rx_mask[2] = 0xff;
2426 	band->ht_cap.mcs.rx_mask[4] = 0x01;
2427 	band->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
2428 
2429 	if (rx_streams != tx_streams) {
2430 		band->ht_cap.mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
2431 		band->ht_cap.mcs.tx_params |= (tx_streams - 1) <<
2432 				IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2433 	}
2434 }
2435 
2436 static void
2437 mwl8k_set_caps(struct ieee80211_hw *hw, u32 caps)
2438 {
2439 	struct mwl8k_priv *priv = hw->priv;
2440 
2441 	if (priv->caps)
2442 		return;
2443 
2444 	if ((caps & MWL8K_CAP_2GHZ4) || !(caps & MWL8K_CAP_BAND_MASK)) {
2445 		mwl8k_setup_2ghz_band(hw);
2446 		if (caps & MWL8K_CAP_MIMO)
2447 			mwl8k_set_ht_caps(hw, &priv->band_24, caps);
2448 	}
2449 
2450 	if (caps & MWL8K_CAP_5GHZ) {
2451 		mwl8k_setup_5ghz_band(hw);
2452 		if (caps & MWL8K_CAP_MIMO)
2453 			mwl8k_set_ht_caps(hw, &priv->band_50, caps);
2454 	}
2455 
2456 	priv->caps = caps;
2457 }
2458 
2459 static int mwl8k_cmd_get_hw_spec_sta(struct ieee80211_hw *hw)
2460 {
2461 	struct mwl8k_priv *priv = hw->priv;
2462 	struct mwl8k_cmd_get_hw_spec_sta *cmd;
2463 	int rc;
2464 	int i;
2465 
2466 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2467 	if (cmd == NULL)
2468 		return -ENOMEM;
2469 
2470 	cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
2471 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
2472 
2473 	memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
2474 	cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2475 	cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma);
2476 	cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv));
2477 	for (i = 0; i < mwl8k_tx_queues(priv); i++)
2478 		cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[i].txd_dma);
2479 	cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
2480 	cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS);
2481 
2482 	rc = mwl8k_post_cmd(hw, &cmd->header);
2483 
2484 	if (!rc) {
2485 		SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
2486 		priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
2487 		priv->fw_rev = le32_to_cpu(cmd->fw_rev);
2488 		priv->hw_rev = cmd->hw_rev;
2489 		mwl8k_set_caps(hw, le32_to_cpu(cmd->caps));
2490 		priv->ap_macids_supported = 0x00000000;
2491 		priv->sta_macids_supported = 0x00000001;
2492 	}
2493 
2494 	kfree(cmd);
2495 	return rc;
2496 }
2497 
2498 /*
2499  * CMD_GET_HW_SPEC (AP version).
2500  */
2501 struct mwl8k_cmd_get_hw_spec_ap {
2502 	struct mwl8k_cmd_pkt header;
2503 	__u8 hw_rev;
2504 	__u8 host_interface;
2505 	__le16 num_wcb;
2506 	__le16 num_mcaddrs;
2507 	__u8 perm_addr[ETH_ALEN];
2508 	__le16 region_code;
2509 	__le16 num_antenna;
2510 	__le32 fw_rev;
2511 	__le32 wcbbase0;
2512 	__le32 rxwrptr;
2513 	__le32 rxrdptr;
2514 	__le32 ps_cookie;
2515 	__le32 wcbbase1;
2516 	__le32 wcbbase2;
2517 	__le32 wcbbase3;
2518 	__le32 fw_api_version;
2519 	__le32 caps;
2520 	__le32 num_of_ampdu_queues;
2521 	__le32 wcbbase_ampdu[MWL8K_MAX_AMPDU_QUEUES];
2522 } __packed;
2523 
2524 static int mwl8k_cmd_get_hw_spec_ap(struct ieee80211_hw *hw)
2525 {
2526 	struct mwl8k_priv *priv = hw->priv;
2527 	struct mwl8k_cmd_get_hw_spec_ap *cmd;
2528 	int rc, i;
2529 	u32 api_version;
2530 
2531 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2532 	if (cmd == NULL)
2533 		return -ENOMEM;
2534 
2535 	cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
2536 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
2537 
2538 	memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
2539 	cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2540 
2541 	rc = mwl8k_post_cmd(hw, &cmd->header);
2542 
2543 	if (!rc) {
2544 		int off;
2545 
2546 		api_version = le32_to_cpu(cmd->fw_api_version);
2547 		if (priv->device_info->fw_api_ap != api_version) {
2548 			printk(KERN_ERR "%s: Unsupported fw API version for %s."
2549 			       "  Expected %d got %d.\n", MWL8K_NAME,
2550 			       priv->device_info->part_name,
2551 			       priv->device_info->fw_api_ap,
2552 			       api_version);
2553 			rc = -EINVAL;
2554 			goto done;
2555 		}
2556 		SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
2557 		priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
2558 		priv->fw_rev = le32_to_cpu(cmd->fw_rev);
2559 		priv->hw_rev = cmd->hw_rev;
2560 		mwl8k_set_caps(hw, le32_to_cpu(cmd->caps));
2561 		priv->ap_macids_supported = 0x000000ff;
2562 		priv->sta_macids_supported = 0x00000100;
2563 		priv->num_ampdu_queues = le32_to_cpu(cmd->num_of_ampdu_queues);
2564 		if (priv->num_ampdu_queues > MWL8K_MAX_AMPDU_QUEUES) {
2565 			wiphy_warn(hw->wiphy, "fw reported %d ampdu queues"
2566 				   " but we only support %d.\n",
2567 				   priv->num_ampdu_queues,
2568 				   MWL8K_MAX_AMPDU_QUEUES);
2569 			priv->num_ampdu_queues = MWL8K_MAX_AMPDU_QUEUES;
2570 		}
2571 		off = le32_to_cpu(cmd->rxwrptr) & 0xffff;
2572 		iowrite32(priv->rxq[0].rxd_dma, priv->sram + off);
2573 
2574 		off = le32_to_cpu(cmd->rxrdptr) & 0xffff;
2575 		iowrite32(priv->rxq[0].rxd_dma, priv->sram + off);
2576 
2577 		priv->txq_offset[0] = le32_to_cpu(cmd->wcbbase0) & 0xffff;
2578 		priv->txq_offset[1] = le32_to_cpu(cmd->wcbbase1) & 0xffff;
2579 		priv->txq_offset[2] = le32_to_cpu(cmd->wcbbase2) & 0xffff;
2580 		priv->txq_offset[3] = le32_to_cpu(cmd->wcbbase3) & 0xffff;
2581 
2582 		for (i = 0; i < priv->num_ampdu_queues; i++)
2583 			priv->txq_offset[i + MWL8K_TX_WMM_QUEUES] =
2584 				le32_to_cpu(cmd->wcbbase_ampdu[i]) & 0xffff;
2585 	}
2586 
2587 done:
2588 	kfree(cmd);
2589 	return rc;
2590 }
2591 
2592 /*
2593  * CMD_SET_HW_SPEC.
2594  */
2595 struct mwl8k_cmd_set_hw_spec {
2596 	struct mwl8k_cmd_pkt header;
2597 	__u8 hw_rev;
2598 	__u8 host_interface;
2599 	__le16 num_mcaddrs;
2600 	__u8 perm_addr[ETH_ALEN];
2601 	__le16 region_code;
2602 	__le32 fw_rev;
2603 	__le32 ps_cookie;
2604 	__le32 caps;
2605 	__le32 rx_queue_ptr;
2606 	__le32 num_tx_queues;
2607 	__le32 tx_queue_ptrs[MWL8K_MAX_TX_QUEUES];
2608 	__le32 flags;
2609 	__le32 num_tx_desc_per_queue;
2610 	__le32 total_rxd;
2611 } __packed;
2612 
2613 /* If enabled, MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY will cause
2614  * packets to expire 500 ms after the timestamp in the tx descriptor.  That is,
2615  * the packets that are queued for more than 500ms, will be dropped in the
2616  * hardware. This helps minimizing the issues caused due to head-of-line
2617  * blocking where a slow client can hog the bandwidth and affect traffic to a
2618  * faster client.
2619  */
2620 #define MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY	0x00000400
2621 #define MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR	0x00000200
2622 #define MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT		0x00000080
2623 #define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP	0x00000020
2624 #define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON		0x00000010
2625 
2626 static int mwl8k_cmd_set_hw_spec(struct ieee80211_hw *hw)
2627 {
2628 	struct mwl8k_priv *priv = hw->priv;
2629 	struct mwl8k_cmd_set_hw_spec *cmd;
2630 	int rc;
2631 	int i;
2632 
2633 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2634 	if (cmd == NULL)
2635 		return -ENOMEM;
2636 
2637 	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_HW_SPEC);
2638 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
2639 
2640 	cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2641 	cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma);
2642 	cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv));
2643 
2644 	/*
2645 	 * Mac80211 stack has Q0 as highest priority and Q3 as lowest in
2646 	 * that order. Firmware has Q3 as highest priority and Q0 as lowest
2647 	 * in that order. Map Q3 of mac80211 to Q0 of firmware so that the
2648 	 * priority is interpreted the right way in firmware.
2649 	 */
2650 	for (i = 0; i < mwl8k_tx_queues(priv); i++) {
2651 		int j = mwl8k_tx_queues(priv) - 1 - i;
2652 		cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[j].txd_dma);
2653 	}
2654 
2655 	cmd->flags = cpu_to_le32(MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT |
2656 				 MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP |
2657 				 MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON |
2658 				 MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY |
2659 				 MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR);
2660 	cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
2661 	cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS);
2662 
2663 	rc = mwl8k_post_cmd(hw, &cmd->header);
2664 	kfree(cmd);
2665 
2666 	return rc;
2667 }
2668 
2669 /*
2670  * CMD_MAC_MULTICAST_ADR.
2671  */
2672 struct mwl8k_cmd_mac_multicast_adr {
2673 	struct mwl8k_cmd_pkt header;
2674 	__le16 action;
2675 	__le16 numaddr;
2676 	__u8 addr[][ETH_ALEN];
2677 };
2678 
2679 #define MWL8K_ENABLE_RX_DIRECTED	0x0001
2680 #define MWL8K_ENABLE_RX_MULTICAST	0x0002
2681 #define MWL8K_ENABLE_RX_ALL_MULTICAST	0x0004
2682 #define MWL8K_ENABLE_RX_BROADCAST	0x0008
2683 
2684 static struct mwl8k_cmd_pkt *
2685 __mwl8k_cmd_mac_multicast_adr(struct ieee80211_hw *hw, int allmulti,
2686 			      struct netdev_hw_addr_list *mc_list)
2687 {
2688 	struct mwl8k_priv *priv = hw->priv;
2689 	struct mwl8k_cmd_mac_multicast_adr *cmd;
2690 	int size;
2691 	int mc_count = 0;
2692 
2693 	if (mc_list)
2694 		mc_count = netdev_hw_addr_list_count(mc_list);
2695 
2696 	if (allmulti || mc_count > priv->num_mcaddrs) {
2697 		allmulti = 1;
2698 		mc_count = 0;
2699 	}
2700 
2701 	size = sizeof(*cmd) + mc_count * ETH_ALEN;
2702 
2703 	cmd = kzalloc(size, GFP_ATOMIC);
2704 	if (cmd == NULL)
2705 		return NULL;
2706 
2707 	cmd->header.code = cpu_to_le16(MWL8K_CMD_MAC_MULTICAST_ADR);
2708 	cmd->header.length = cpu_to_le16(size);
2709 	cmd->action = cpu_to_le16(MWL8K_ENABLE_RX_DIRECTED |
2710 				  MWL8K_ENABLE_RX_BROADCAST);
2711 
2712 	if (allmulti) {
2713 		cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_ALL_MULTICAST);
2714 	} else if (mc_count) {
2715 		struct netdev_hw_addr *ha;
2716 		int i = 0;
2717 
2718 		cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_MULTICAST);
2719 		cmd->numaddr = cpu_to_le16(mc_count);
2720 		netdev_hw_addr_list_for_each(ha, mc_list) {
2721 			memcpy(cmd->addr[i], ha->addr, ETH_ALEN);
2722 		}
2723 	}
2724 
2725 	return &cmd->header;
2726 }
2727 
2728 /*
2729  * CMD_GET_STAT.
2730  */
2731 struct mwl8k_cmd_get_stat {
2732 	struct mwl8k_cmd_pkt header;
2733 	__le32 stats[64];
2734 } __packed;
2735 
2736 #define MWL8K_STAT_ACK_FAILURE	9
2737 #define MWL8K_STAT_RTS_FAILURE	12
2738 #define MWL8K_STAT_FCS_ERROR	24
2739 #define MWL8K_STAT_RTS_SUCCESS	11
2740 
2741 static int mwl8k_cmd_get_stat(struct ieee80211_hw *hw,
2742 			      struct ieee80211_low_level_stats *stats)
2743 {
2744 	struct mwl8k_cmd_get_stat *cmd;
2745 	int rc;
2746 
2747 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2748 	if (cmd == NULL)
2749 		return -ENOMEM;
2750 
2751 	cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_STAT);
2752 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
2753 
2754 	rc = mwl8k_post_cmd(hw, &cmd->header);
2755 	if (!rc) {
2756 		stats->dot11ACKFailureCount =
2757 			le32_to_cpu(cmd->stats[MWL8K_STAT_ACK_FAILURE]);
2758 		stats->dot11RTSFailureCount =
2759 			le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_FAILURE]);
2760 		stats->dot11FCSErrorCount =
2761 			le32_to_cpu(cmd->stats[MWL8K_STAT_FCS_ERROR]);
2762 		stats->dot11RTSSuccessCount =
2763 			le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_SUCCESS]);
2764 	}
2765 	kfree(cmd);
2766 
2767 	return rc;
2768 }
2769 
2770 /*
2771  * CMD_RADIO_CONTROL.
2772  */
2773 struct mwl8k_cmd_radio_control {
2774 	struct mwl8k_cmd_pkt header;
2775 	__le16 action;
2776 	__le16 control;
2777 	__le16 radio_on;
2778 } __packed;
2779 
2780 static int
2781 mwl8k_cmd_radio_control(struct ieee80211_hw *hw, bool enable, bool force)
2782 {
2783 	struct mwl8k_priv *priv = hw->priv;
2784 	struct mwl8k_cmd_radio_control *cmd;
2785 	int rc;
2786 
2787 	if (enable == priv->radio_on && !force)
2788 		return 0;
2789 
2790 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2791 	if (cmd == NULL)
2792 		return -ENOMEM;
2793 
2794 	cmd->header.code = cpu_to_le16(MWL8K_CMD_RADIO_CONTROL);
2795 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
2796 	cmd->action = cpu_to_le16(MWL8K_CMD_SET);
2797 	cmd->control = cpu_to_le16(priv->radio_short_preamble ? 3 : 1);
2798 	cmd->radio_on = cpu_to_le16(enable ? 0x0001 : 0x0000);
2799 
2800 	rc = mwl8k_post_cmd(hw, &cmd->header);
2801 	kfree(cmd);
2802 
2803 	if (!rc)
2804 		priv->radio_on = enable;
2805 
2806 	return rc;
2807 }
2808 
2809 static int mwl8k_cmd_radio_disable(struct ieee80211_hw *hw)
2810 {
2811 	return mwl8k_cmd_radio_control(hw, 0, 0);
2812 }
2813 
2814 static int mwl8k_cmd_radio_enable(struct ieee80211_hw *hw)
2815 {
2816 	return mwl8k_cmd_radio_control(hw, 1, 0);
2817 }
2818 
2819 static int
2820 mwl8k_set_radio_preamble(struct ieee80211_hw *hw, bool short_preamble)
2821 {
2822 	struct mwl8k_priv *priv = hw->priv;
2823 
2824 	priv->radio_short_preamble = short_preamble;
2825 
2826 	return mwl8k_cmd_radio_control(hw, 1, 1);
2827 }
2828 
2829 /*
2830  * CMD_RF_TX_POWER.
2831  */
2832 #define MWL8K_RF_TX_POWER_LEVEL_TOTAL	8
2833 
2834 struct mwl8k_cmd_rf_tx_power {
2835 	struct mwl8k_cmd_pkt header;
2836 	__le16 action;
2837 	__le16 support_level;
2838 	__le16 current_level;
2839 	__le16 reserved;
2840 	__le16 power_level_list[MWL8K_RF_TX_POWER_LEVEL_TOTAL];
2841 } __packed;
2842 
2843 static int mwl8k_cmd_rf_tx_power(struct ieee80211_hw *hw, int dBm)
2844 {
2845 	struct mwl8k_cmd_rf_tx_power *cmd;
2846 	int rc;
2847 
2848 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2849 	if (cmd == NULL)
2850 		return -ENOMEM;
2851 
2852 	cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_TX_POWER);
2853 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
2854 	cmd->action = cpu_to_le16(MWL8K_CMD_SET);
2855 	cmd->support_level = cpu_to_le16(dBm);
2856 
2857 	rc = mwl8k_post_cmd(hw, &cmd->header);
2858 	kfree(cmd);
2859 
2860 	return rc;
2861 }
2862 
2863 /*
2864  * CMD_TX_POWER.
2865  */
2866 #define MWL8K_TX_POWER_LEVEL_TOTAL      12
2867 
2868 struct mwl8k_cmd_tx_power {
2869 	struct mwl8k_cmd_pkt header;
2870 	__le16 action;
2871 	__le16 band;
2872 	__le16 channel;
2873 	__le16 bw;
2874 	__le16 sub_ch;
2875 	__le16 power_level_list[MWL8K_TX_POWER_LEVEL_TOTAL];
2876 } __packed;
2877 
2878 static int mwl8k_cmd_tx_power(struct ieee80211_hw *hw,
2879 				     struct ieee80211_conf *conf,
2880 				     unsigned short pwr)
2881 {
2882 	struct ieee80211_channel *channel = conf->chandef.chan;
2883 	enum nl80211_channel_type channel_type =
2884 		cfg80211_get_chandef_type(&conf->chandef);
2885 	struct mwl8k_cmd_tx_power *cmd;
2886 	int rc;
2887 	int i;
2888 
2889 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2890 	if (cmd == NULL)
2891 		return -ENOMEM;
2892 
2893 	cmd->header.code = cpu_to_le16(MWL8K_CMD_TX_POWER);
2894 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
2895 	cmd->action = cpu_to_le16(MWL8K_CMD_SET_LIST);
2896 
2897 	if (channel->band == NL80211_BAND_2GHZ)
2898 		cmd->band = cpu_to_le16(0x1);
2899 	else if (channel->band == NL80211_BAND_5GHZ)
2900 		cmd->band = cpu_to_le16(0x4);
2901 
2902 	cmd->channel = cpu_to_le16(channel->hw_value);
2903 
2904 	if (channel_type == NL80211_CHAN_NO_HT ||
2905 	    channel_type == NL80211_CHAN_HT20) {
2906 		cmd->bw = cpu_to_le16(0x2);
2907 	} else {
2908 		cmd->bw = cpu_to_le16(0x4);
2909 		if (channel_type == NL80211_CHAN_HT40MINUS)
2910 			cmd->sub_ch = cpu_to_le16(0x3);
2911 		else if (channel_type == NL80211_CHAN_HT40PLUS)
2912 			cmd->sub_ch = cpu_to_le16(0x1);
2913 	}
2914 
2915 	for (i = 0; i < MWL8K_TX_POWER_LEVEL_TOTAL; i++)
2916 		cmd->power_level_list[i] = cpu_to_le16(pwr);
2917 
2918 	rc = mwl8k_post_cmd(hw, &cmd->header);
2919 	kfree(cmd);
2920 
2921 	return rc;
2922 }
2923 
2924 /*
2925  * CMD_RF_ANTENNA.
2926  */
2927 struct mwl8k_cmd_rf_antenna {
2928 	struct mwl8k_cmd_pkt header;
2929 	__le16 antenna;
2930 	__le16 mode;
2931 } __packed;
2932 
2933 #define MWL8K_RF_ANTENNA_RX		1
2934 #define MWL8K_RF_ANTENNA_TX		2
2935 
2936 static int
2937 mwl8k_cmd_rf_antenna(struct ieee80211_hw *hw, int antenna, int mask)
2938 {
2939 	struct mwl8k_cmd_rf_antenna *cmd;
2940 	int rc;
2941 
2942 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2943 	if (cmd == NULL)
2944 		return -ENOMEM;
2945 
2946 	cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_ANTENNA);
2947 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
2948 	cmd->antenna = cpu_to_le16(antenna);
2949 	cmd->mode = cpu_to_le16(mask);
2950 
2951 	rc = mwl8k_post_cmd(hw, &cmd->header);
2952 	kfree(cmd);
2953 
2954 	return rc;
2955 }
2956 
2957 /*
2958  * CMD_SET_BEACON.
2959  */
2960 struct mwl8k_cmd_set_beacon {
2961 	struct mwl8k_cmd_pkt header;
2962 	__le16 beacon_len;
2963 	__u8 beacon[];
2964 };
2965 
2966 static int mwl8k_cmd_set_beacon(struct ieee80211_hw *hw,
2967 				struct ieee80211_vif *vif, u8 *beacon, int len)
2968 {
2969 	struct mwl8k_cmd_set_beacon *cmd;
2970 	int rc;
2971 
2972 	cmd = kzalloc(sizeof(*cmd) + len, GFP_KERNEL);
2973 	if (cmd == NULL)
2974 		return -ENOMEM;
2975 
2976 	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_BEACON);
2977 	cmd->header.length = cpu_to_le16(sizeof(*cmd) + len);
2978 	cmd->beacon_len = cpu_to_le16(len);
2979 	memcpy(cmd->beacon, beacon, len);
2980 
2981 	rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
2982 	kfree(cmd);
2983 
2984 	return rc;
2985 }
2986 
2987 /*
2988  * CMD_SET_PRE_SCAN.
2989  */
2990 struct mwl8k_cmd_set_pre_scan {
2991 	struct mwl8k_cmd_pkt header;
2992 } __packed;
2993 
2994 static int mwl8k_cmd_set_pre_scan(struct ieee80211_hw *hw)
2995 {
2996 	struct mwl8k_cmd_set_pre_scan *cmd;
2997 	int rc;
2998 
2999 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3000 	if (cmd == NULL)
3001 		return -ENOMEM;
3002 
3003 	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_PRE_SCAN);
3004 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
3005 
3006 	rc = mwl8k_post_cmd(hw, &cmd->header);
3007 	kfree(cmd);
3008 
3009 	return rc;
3010 }
3011 
3012 /*
3013  * CMD_BBP_REG_ACCESS.
3014  */
3015 struct mwl8k_cmd_bbp_reg_access {
3016 	struct mwl8k_cmd_pkt header;
3017 	__le16 action;
3018 	__le16 offset;
3019 	u8 value;
3020 	u8 rsrv[3];
3021 } __packed;
3022 
3023 static int
3024 mwl8k_cmd_bbp_reg_access(struct ieee80211_hw *hw,
3025 			 u16 action,
3026 			 u16 offset,
3027 			 u8 *value)
3028 {
3029 	struct mwl8k_cmd_bbp_reg_access *cmd;
3030 	int rc;
3031 
3032 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3033 	if (cmd == NULL)
3034 		return -ENOMEM;
3035 
3036 	cmd->header.code = cpu_to_le16(MWL8K_CMD_BBP_REG_ACCESS);
3037 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
3038 	cmd->action = cpu_to_le16(action);
3039 	cmd->offset = cpu_to_le16(offset);
3040 
3041 	rc = mwl8k_post_cmd(hw, &cmd->header);
3042 
3043 	if (!rc)
3044 		*value = cmd->value;
3045 	else
3046 		*value = 0;
3047 
3048 	kfree(cmd);
3049 
3050 	return rc;
3051 }
3052 
3053 /*
3054  * CMD_SET_POST_SCAN.
3055  */
3056 struct mwl8k_cmd_set_post_scan {
3057 	struct mwl8k_cmd_pkt header;
3058 	__le32 isibss;
3059 	__u8 bssid[ETH_ALEN];
3060 } __packed;
3061 
3062 static int
3063 mwl8k_cmd_set_post_scan(struct ieee80211_hw *hw, const __u8 *mac)
3064 {
3065 	struct mwl8k_cmd_set_post_scan *cmd;
3066 	int rc;
3067 
3068 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3069 	if (cmd == NULL)
3070 		return -ENOMEM;
3071 
3072 	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_POST_SCAN);
3073 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
3074 	cmd->isibss = 0;
3075 	memcpy(cmd->bssid, mac, ETH_ALEN);
3076 
3077 	rc = mwl8k_post_cmd(hw, &cmd->header);
3078 	kfree(cmd);
3079 
3080 	return rc;
3081 }
3082 
3083 static int freq_to_idx(struct mwl8k_priv *priv, int freq)
3084 {
3085 	struct ieee80211_supported_band *sband;
3086 	int band, ch, idx = 0;
3087 
3088 	for (band = NL80211_BAND_2GHZ; band < NUM_NL80211_BANDS; band++) {
3089 		sband = priv->hw->wiphy->bands[band];
3090 		if (!sband)
3091 			continue;
3092 
3093 		for (ch = 0; ch < sband->n_channels; ch++, idx++)
3094 			if (sband->channels[ch].center_freq == freq)
3095 				goto exit;
3096 	}
3097 
3098 exit:
3099 	return idx;
3100 }
3101 
3102 static void mwl8k_update_survey(struct mwl8k_priv *priv,
3103 				struct ieee80211_channel *channel)
3104 {
3105 	u32 cca_cnt, rx_rdy;
3106 	s8 nf = 0, idx;
3107 	struct survey_info *survey;
3108 
3109 	idx = freq_to_idx(priv, priv->acs_chan->center_freq);
3110 	if (idx >= MWL8K_NUM_CHANS) {
3111 		wiphy_err(priv->hw->wiphy, "Failed to update survey\n");
3112 		return;
3113 	}
3114 
3115 	survey = &priv->survey[idx];
3116 
3117 	cca_cnt = ioread32(priv->regs + NOK_CCA_CNT_REG);
3118 	cca_cnt /= 1000; /* uSecs to mSecs */
3119 	survey->time_busy = (u64) cca_cnt;
3120 
3121 	rx_rdy = ioread32(priv->regs + BBU_RXRDY_CNT_REG);
3122 	rx_rdy /= 1000; /* uSecs to mSecs */
3123 	survey->time_rx = (u64) rx_rdy;
3124 
3125 	priv->channel_time = jiffies - priv->channel_time;
3126 	survey->time = jiffies_to_msecs(priv->channel_time);
3127 
3128 	survey->channel = channel;
3129 
3130 	mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &nf);
3131 
3132 	/* Make sure sign is negative else ACS  at hostapd fails */
3133 	survey->noise = nf * -1;
3134 
3135 	survey->filled = SURVEY_INFO_NOISE_DBM |
3136 			 SURVEY_INFO_TIME |
3137 			 SURVEY_INFO_TIME_BUSY |
3138 			 SURVEY_INFO_TIME_RX;
3139 }
3140 
3141 /*
3142  * CMD_SET_RF_CHANNEL.
3143  */
3144 struct mwl8k_cmd_set_rf_channel {
3145 	struct mwl8k_cmd_pkt header;
3146 	__le16 action;
3147 	__u8 current_channel;
3148 	__le32 channel_flags;
3149 } __packed;
3150 
3151 static int mwl8k_cmd_set_rf_channel(struct ieee80211_hw *hw,
3152 				    struct ieee80211_conf *conf)
3153 {
3154 	struct ieee80211_channel *channel = conf->chandef.chan;
3155 	enum nl80211_channel_type channel_type =
3156 		cfg80211_get_chandef_type(&conf->chandef);
3157 	struct mwl8k_cmd_set_rf_channel *cmd;
3158 	struct mwl8k_priv *priv = hw->priv;
3159 	int rc;
3160 
3161 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3162 	if (cmd == NULL)
3163 		return -ENOMEM;
3164 
3165 	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RF_CHANNEL);
3166 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
3167 	cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3168 	cmd->current_channel = channel->hw_value;
3169 
3170 	if (channel->band == NL80211_BAND_2GHZ)
3171 		cmd->channel_flags |= cpu_to_le32(0x00000001);
3172 	else if (channel->band == NL80211_BAND_5GHZ)
3173 		cmd->channel_flags |= cpu_to_le32(0x00000004);
3174 
3175 	if (!priv->sw_scan_start) {
3176 		if (channel_type == NL80211_CHAN_NO_HT ||
3177 		    channel_type == NL80211_CHAN_HT20)
3178 			cmd->channel_flags |= cpu_to_le32(0x00000080);
3179 		else if (channel_type == NL80211_CHAN_HT40MINUS)
3180 			cmd->channel_flags |= cpu_to_le32(0x000001900);
3181 		else if (channel_type == NL80211_CHAN_HT40PLUS)
3182 			cmd->channel_flags |= cpu_to_le32(0x000000900);
3183 	} else {
3184 		cmd->channel_flags |= cpu_to_le32(0x00000080);
3185 	}
3186 
3187 	if (priv->sw_scan_start) {
3188 		/* Store current channel stats
3189 		 * before switching to newer one.
3190 		 * This will be processed only for AP fw.
3191 		 */
3192 		if (priv->channel_time != 0)
3193 			mwl8k_update_survey(priv, priv->acs_chan);
3194 
3195 		priv->channel_time = jiffies;
3196 		priv->acs_chan =  channel;
3197 	}
3198 
3199 	rc = mwl8k_post_cmd(hw, &cmd->header);
3200 	kfree(cmd);
3201 
3202 	return rc;
3203 }
3204 
3205 /*
3206  * CMD_SET_AID.
3207  */
3208 #define MWL8K_FRAME_PROT_DISABLED			0x00
3209 #define MWL8K_FRAME_PROT_11G				0x07
3210 #define MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY		0x02
3211 #define MWL8K_FRAME_PROT_11N_HT_ALL			0x06
3212 
3213 struct mwl8k_cmd_update_set_aid {
3214 	struct	mwl8k_cmd_pkt header;
3215 	__le16	aid;
3216 
3217 	 /* AP's MAC address (BSSID) */
3218 	__u8	bssid[ETH_ALEN];
3219 	__le16	protection_mode;
3220 	__u8	supp_rates[14];
3221 } __packed;
3222 
3223 static void legacy_rate_mask_to_array(u8 *rates, u32 mask)
3224 {
3225 	int i;
3226 	int j;
3227 
3228 	/*
3229 	 * Clear nonstandard rate 4.
3230 	 */
3231 	mask &= 0x1fef;
3232 
3233 	for (i = 0, j = 0; i < 13; i++) {
3234 		if (mask & (1 << i))
3235 			rates[j++] = mwl8k_rates_24[i].hw_value;
3236 	}
3237 }
3238 
3239 static int
3240 mwl8k_cmd_set_aid(struct ieee80211_hw *hw,
3241 		  struct ieee80211_vif *vif, u32 legacy_rate_mask)
3242 {
3243 	struct mwl8k_cmd_update_set_aid *cmd;
3244 	u16 prot_mode;
3245 	int rc;
3246 
3247 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3248 	if (cmd == NULL)
3249 		return -ENOMEM;
3250 
3251 	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_AID);
3252 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
3253 	cmd->aid = cpu_to_le16(vif->cfg.aid);
3254 	memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
3255 
3256 	if (vif->bss_conf.use_cts_prot) {
3257 		prot_mode = MWL8K_FRAME_PROT_11G;
3258 	} else {
3259 		switch (vif->bss_conf.ht_operation_mode &
3260 			IEEE80211_HT_OP_MODE_PROTECTION) {
3261 		case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
3262 			prot_mode = MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY;
3263 			break;
3264 		case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
3265 			prot_mode = MWL8K_FRAME_PROT_11N_HT_ALL;
3266 			break;
3267 		default:
3268 			prot_mode = MWL8K_FRAME_PROT_DISABLED;
3269 			break;
3270 		}
3271 	}
3272 	cmd->protection_mode = cpu_to_le16(prot_mode);
3273 
3274 	legacy_rate_mask_to_array(cmd->supp_rates, legacy_rate_mask);
3275 
3276 	rc = mwl8k_post_cmd(hw, &cmd->header);
3277 	kfree(cmd);
3278 
3279 	return rc;
3280 }
3281 
3282 /*
3283  * CMD_SET_RATE.
3284  */
3285 struct mwl8k_cmd_set_rate {
3286 	struct	mwl8k_cmd_pkt header;
3287 	__u8	legacy_rates[14];
3288 
3289 	/* Bitmap for supported MCS codes.  */
3290 	__u8	mcs_set[16];
3291 	__u8	reserved[16];
3292 } __packed;
3293 
3294 static int
3295 mwl8k_cmd_set_rate(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
3296 		   u32 legacy_rate_mask, u8 *mcs_rates)
3297 {
3298 	struct mwl8k_cmd_set_rate *cmd;
3299 	int rc;
3300 
3301 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3302 	if (cmd == NULL)
3303 		return -ENOMEM;
3304 
3305 	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATE);
3306 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
3307 	legacy_rate_mask_to_array(cmd->legacy_rates, legacy_rate_mask);
3308 	memcpy(cmd->mcs_set, mcs_rates, 16);
3309 
3310 	rc = mwl8k_post_cmd(hw, &cmd->header);
3311 	kfree(cmd);
3312 
3313 	return rc;
3314 }
3315 
3316 /*
3317  * CMD_FINALIZE_JOIN.
3318  */
3319 #define MWL8K_FJ_BEACON_MAXLEN	128
3320 
3321 struct mwl8k_cmd_finalize_join {
3322 	struct mwl8k_cmd_pkt header;
3323 	__le32 sleep_interval;	/* Number of beacon periods to sleep */
3324 	__u8 beacon_data[MWL8K_FJ_BEACON_MAXLEN];
3325 } __packed;
3326 
3327 static int mwl8k_cmd_finalize_join(struct ieee80211_hw *hw, void *frame,
3328 				   int framelen, int dtim)
3329 {
3330 	struct mwl8k_cmd_finalize_join *cmd;
3331 	struct ieee80211_mgmt *payload = frame;
3332 	int payload_len;
3333 	int rc;
3334 
3335 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3336 	if (cmd == NULL)
3337 		return -ENOMEM;
3338 
3339 	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_FINALIZE_JOIN);
3340 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
3341 	cmd->sleep_interval = cpu_to_le32(dtim ? dtim : 1);
3342 
3343 	payload_len = framelen - ieee80211_hdrlen(payload->frame_control);
3344 	if (payload_len < 0)
3345 		payload_len = 0;
3346 	else if (payload_len > MWL8K_FJ_BEACON_MAXLEN)
3347 		payload_len = MWL8K_FJ_BEACON_MAXLEN;
3348 
3349 	memcpy(cmd->beacon_data, &payload->u.beacon, payload_len);
3350 
3351 	rc = mwl8k_post_cmd(hw, &cmd->header);
3352 	kfree(cmd);
3353 
3354 	return rc;
3355 }
3356 
3357 /*
3358  * CMD_SET_RTS_THRESHOLD.
3359  */
3360 struct mwl8k_cmd_set_rts_threshold {
3361 	struct mwl8k_cmd_pkt header;
3362 	__le16 action;
3363 	__le16 threshold;
3364 } __packed;
3365 
3366 static int
3367 mwl8k_cmd_set_rts_threshold(struct ieee80211_hw *hw, int rts_thresh)
3368 {
3369 	struct mwl8k_cmd_set_rts_threshold *cmd;
3370 	int rc;
3371 
3372 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3373 	if (cmd == NULL)
3374 		return -ENOMEM;
3375 
3376 	cmd->header.code = cpu_to_le16(MWL8K_CMD_RTS_THRESHOLD);
3377 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
3378 	cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3379 	cmd->threshold = cpu_to_le16(rts_thresh);
3380 
3381 	rc = mwl8k_post_cmd(hw, &cmd->header);
3382 	kfree(cmd);
3383 
3384 	return rc;
3385 }
3386 
3387 /*
3388  * CMD_SET_SLOT.
3389  */
3390 struct mwl8k_cmd_set_slot {
3391 	struct mwl8k_cmd_pkt header;
3392 	__le16 action;
3393 	__u8 short_slot;
3394 } __packed;
3395 
3396 static int mwl8k_cmd_set_slot(struct ieee80211_hw *hw, bool short_slot_time)
3397 {
3398 	struct mwl8k_cmd_set_slot *cmd;
3399 	int rc;
3400 
3401 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3402 	if (cmd == NULL)
3403 		return -ENOMEM;
3404 
3405 	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_SLOT);
3406 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
3407 	cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3408 	cmd->short_slot = short_slot_time;
3409 
3410 	rc = mwl8k_post_cmd(hw, &cmd->header);
3411 	kfree(cmd);
3412 
3413 	return rc;
3414 }
3415 
3416 /*
3417  * CMD_SET_EDCA_PARAMS.
3418  */
3419 struct mwl8k_cmd_set_edca_params {
3420 	struct mwl8k_cmd_pkt header;
3421 
3422 	/* See MWL8K_SET_EDCA_XXX below */
3423 	__le16 action;
3424 
3425 	/* TX opportunity in units of 32 us */
3426 	__le16 txop;
3427 
3428 	union {
3429 		struct {
3430 			/* Log exponent of max contention period: 0...15 */
3431 			__le32 log_cw_max;
3432 
3433 			/* Log exponent of min contention period: 0...15 */
3434 			__le32 log_cw_min;
3435 
3436 			/* Adaptive interframe spacing in units of 32us */
3437 			__u8 aifs;
3438 
3439 			/* TX queue to configure */
3440 			__u8 txq;
3441 		} ap;
3442 		struct {
3443 			/* Log exponent of max contention period: 0...15 */
3444 			__u8 log_cw_max;
3445 
3446 			/* Log exponent of min contention period: 0...15 */
3447 			__u8 log_cw_min;
3448 
3449 			/* Adaptive interframe spacing in units of 32us */
3450 			__u8 aifs;
3451 
3452 			/* TX queue to configure */
3453 			__u8 txq;
3454 		} sta;
3455 	};
3456 } __packed;
3457 
3458 #define MWL8K_SET_EDCA_CW	0x01
3459 #define MWL8K_SET_EDCA_TXOP	0x02
3460 #define MWL8K_SET_EDCA_AIFS	0x04
3461 
3462 #define MWL8K_SET_EDCA_ALL	(MWL8K_SET_EDCA_CW | \
3463 				 MWL8K_SET_EDCA_TXOP | \
3464 				 MWL8K_SET_EDCA_AIFS)
3465 
3466 static int
3467 mwl8k_cmd_set_edca_params(struct ieee80211_hw *hw, __u8 qnum,
3468 			  __u16 cw_min, __u16 cw_max,
3469 			  __u8 aifs, __u16 txop)
3470 {
3471 	struct mwl8k_priv *priv = hw->priv;
3472 	struct mwl8k_cmd_set_edca_params *cmd;
3473 	int rc;
3474 
3475 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3476 	if (cmd == NULL)
3477 		return -ENOMEM;
3478 
3479 	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_EDCA_PARAMS);
3480 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
3481 	cmd->action = cpu_to_le16(MWL8K_SET_EDCA_ALL);
3482 	cmd->txop = cpu_to_le16(txop);
3483 	if (priv->ap_fw) {
3484 		cmd->ap.log_cw_max = cpu_to_le32(ilog2(cw_max + 1));
3485 		cmd->ap.log_cw_min = cpu_to_le32(ilog2(cw_min + 1));
3486 		cmd->ap.aifs = aifs;
3487 		cmd->ap.txq = qnum;
3488 	} else {
3489 		cmd->sta.log_cw_max = (u8)ilog2(cw_max + 1);
3490 		cmd->sta.log_cw_min = (u8)ilog2(cw_min + 1);
3491 		cmd->sta.aifs = aifs;
3492 		cmd->sta.txq = qnum;
3493 	}
3494 
3495 	rc = mwl8k_post_cmd(hw, &cmd->header);
3496 	kfree(cmd);
3497 
3498 	return rc;
3499 }
3500 
3501 /*
3502  * CMD_SET_WMM_MODE.
3503  */
3504 struct mwl8k_cmd_set_wmm_mode {
3505 	struct mwl8k_cmd_pkt header;
3506 	__le16 action;
3507 } __packed;
3508 
3509 static int mwl8k_cmd_set_wmm_mode(struct ieee80211_hw *hw, bool enable)
3510 {
3511 	struct mwl8k_priv *priv = hw->priv;
3512 	struct mwl8k_cmd_set_wmm_mode *cmd;
3513 	int rc;
3514 
3515 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3516 	if (cmd == NULL)
3517 		return -ENOMEM;
3518 
3519 	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_WMM_MODE);
3520 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
3521 	cmd->action = cpu_to_le16(!!enable);
3522 
3523 	rc = mwl8k_post_cmd(hw, &cmd->header);
3524 	kfree(cmd);
3525 
3526 	if (!rc)
3527 		priv->wmm_enabled = enable;
3528 
3529 	return rc;
3530 }
3531 
3532 /*
3533  * CMD_MIMO_CONFIG.
3534  */
3535 struct mwl8k_cmd_mimo_config {
3536 	struct mwl8k_cmd_pkt header;
3537 	__le32 action;
3538 	__u8 rx_antenna_map;
3539 	__u8 tx_antenna_map;
3540 } __packed;
3541 
3542 static int mwl8k_cmd_mimo_config(struct ieee80211_hw *hw, __u8 rx, __u8 tx)
3543 {
3544 	struct mwl8k_cmd_mimo_config *cmd;
3545 	int rc;
3546 
3547 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3548 	if (cmd == NULL)
3549 		return -ENOMEM;
3550 
3551 	cmd->header.code = cpu_to_le16(MWL8K_CMD_MIMO_CONFIG);
3552 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
3553 	cmd->action = cpu_to_le32((u32)MWL8K_CMD_SET);
3554 	cmd->rx_antenna_map = rx;
3555 	cmd->tx_antenna_map = tx;
3556 
3557 	rc = mwl8k_post_cmd(hw, &cmd->header);
3558 	kfree(cmd);
3559 
3560 	return rc;
3561 }
3562 
3563 /*
3564  * CMD_USE_FIXED_RATE (STA version).
3565  */
3566 struct mwl8k_cmd_use_fixed_rate_sta {
3567 	struct mwl8k_cmd_pkt header;
3568 	__le32 action;
3569 	__le32 allow_rate_drop;
3570 	__le32 num_rates;
3571 	struct {
3572 		__le32 is_ht_rate;
3573 		__le32 enable_retry;
3574 		__le32 rate;
3575 		__le32 retry_count;
3576 	} rate_entry[8];
3577 	__le32 rate_type;
3578 	__le32 reserved1;
3579 	__le32 reserved2;
3580 } __packed;
3581 
3582 #define MWL8K_USE_AUTO_RATE	0x0002
3583 #define MWL8K_UCAST_RATE	0
3584 
3585 static int mwl8k_cmd_use_fixed_rate_sta(struct ieee80211_hw *hw)
3586 {
3587 	struct mwl8k_cmd_use_fixed_rate_sta *cmd;
3588 	int rc;
3589 
3590 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3591 	if (cmd == NULL)
3592 		return -ENOMEM;
3593 
3594 	cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
3595 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
3596 	cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE);
3597 	cmd->rate_type = cpu_to_le32(MWL8K_UCAST_RATE);
3598 
3599 	rc = mwl8k_post_cmd(hw, &cmd->header);
3600 	kfree(cmd);
3601 
3602 	return rc;
3603 }
3604 
3605 /*
3606  * CMD_USE_FIXED_RATE (AP version).
3607  */
3608 struct mwl8k_cmd_use_fixed_rate_ap {
3609 	struct mwl8k_cmd_pkt header;
3610 	__le32 action;
3611 	__le32 allow_rate_drop;
3612 	__le32 num_rates;
3613 	struct mwl8k_rate_entry_ap {
3614 		__le32 is_ht_rate;
3615 		__le32 enable_retry;
3616 		__le32 rate;
3617 		__le32 retry_count;
3618 	} rate_entry[4];
3619 	u8 multicast_rate;
3620 	u8 multicast_rate_type;
3621 	u8 management_rate;
3622 } __packed;
3623 
3624 static int
3625 mwl8k_cmd_use_fixed_rate_ap(struct ieee80211_hw *hw, int mcast, int mgmt)
3626 {
3627 	struct mwl8k_cmd_use_fixed_rate_ap *cmd;
3628 	int rc;
3629 
3630 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3631 	if (cmd == NULL)
3632 		return -ENOMEM;
3633 
3634 	cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
3635 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
3636 	cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE);
3637 	cmd->multicast_rate = mcast;
3638 	cmd->management_rate = mgmt;
3639 
3640 	rc = mwl8k_post_cmd(hw, &cmd->header);
3641 	kfree(cmd);
3642 
3643 	return rc;
3644 }
3645 
3646 /*
3647  * CMD_ENABLE_SNIFFER.
3648  */
3649 struct mwl8k_cmd_enable_sniffer {
3650 	struct mwl8k_cmd_pkt header;
3651 	__le32 action;
3652 } __packed;
3653 
3654 static int mwl8k_cmd_enable_sniffer(struct ieee80211_hw *hw, bool enable)
3655 {
3656 	struct mwl8k_cmd_enable_sniffer *cmd;
3657 	int rc;
3658 
3659 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3660 	if (cmd == NULL)
3661 		return -ENOMEM;
3662 
3663 	cmd->header.code = cpu_to_le16(MWL8K_CMD_ENABLE_SNIFFER);
3664 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
3665 	cmd->action = cpu_to_le32(!!enable);
3666 
3667 	rc = mwl8k_post_cmd(hw, &cmd->header);
3668 	kfree(cmd);
3669 
3670 	return rc;
3671 }
3672 
3673 struct mwl8k_cmd_update_mac_addr {
3674 	struct mwl8k_cmd_pkt header;
3675 	union {
3676 		struct {
3677 			__le16 mac_type;
3678 			__u8 mac_addr[ETH_ALEN];
3679 		} mbss;
3680 		__u8 mac_addr[ETH_ALEN];
3681 	};
3682 } __packed;
3683 
3684 #define MWL8K_MAC_TYPE_PRIMARY_CLIENT		0
3685 #define MWL8K_MAC_TYPE_SECONDARY_CLIENT		1
3686 #define MWL8K_MAC_TYPE_PRIMARY_AP		2
3687 #define MWL8K_MAC_TYPE_SECONDARY_AP		3
3688 
3689 static int mwl8k_cmd_update_mac_addr(struct ieee80211_hw *hw,
3690 				  struct ieee80211_vif *vif, u8 *mac, bool set)
3691 {
3692 	struct mwl8k_priv *priv = hw->priv;
3693 	struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
3694 	struct mwl8k_cmd_update_mac_addr *cmd;
3695 	int mac_type;
3696 	int rc;
3697 
3698 	mac_type = MWL8K_MAC_TYPE_PRIMARY_AP;
3699 	if (vif != NULL && vif->type == NL80211_IFTYPE_STATION) {
3700 		if (mwl8k_vif->macid + 1 == ffs(priv->sta_macids_supported))
3701 			if (priv->ap_fw)
3702 				mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT;
3703 			else
3704 				mac_type = MWL8K_MAC_TYPE_PRIMARY_CLIENT;
3705 		else
3706 			mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT;
3707 	} else if (vif != NULL && vif->type == NL80211_IFTYPE_AP) {
3708 		if (mwl8k_vif->macid + 1 == ffs(priv->ap_macids_supported))
3709 			mac_type = MWL8K_MAC_TYPE_PRIMARY_AP;
3710 		else
3711 			mac_type = MWL8K_MAC_TYPE_SECONDARY_AP;
3712 	}
3713 
3714 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3715 	if (cmd == NULL)
3716 		return -ENOMEM;
3717 
3718 	if (set)
3719 		cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_MAC_ADDR);
3720 	else
3721 		cmd->header.code = cpu_to_le16(MWL8K_CMD_DEL_MAC_ADDR);
3722 
3723 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
3724 	if (priv->ap_fw) {
3725 		cmd->mbss.mac_type = cpu_to_le16(mac_type);
3726 		memcpy(cmd->mbss.mac_addr, mac, ETH_ALEN);
3727 	} else {
3728 		memcpy(cmd->mac_addr, mac, ETH_ALEN);
3729 	}
3730 
3731 	rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3732 	kfree(cmd);
3733 
3734 	return rc;
3735 }
3736 
3737 /*
3738  * MWL8K_CMD_SET_MAC_ADDR.
3739  */
3740 static inline int mwl8k_cmd_set_mac_addr(struct ieee80211_hw *hw,
3741 				  struct ieee80211_vif *vif, u8 *mac)
3742 {
3743 	return mwl8k_cmd_update_mac_addr(hw, vif, mac, true);
3744 }
3745 
3746 /*
3747  * MWL8K_CMD_DEL_MAC_ADDR.
3748  */
3749 static inline int mwl8k_cmd_del_mac_addr(struct ieee80211_hw *hw,
3750 				  struct ieee80211_vif *vif, u8 *mac)
3751 {
3752 	return mwl8k_cmd_update_mac_addr(hw, vif, mac, false);
3753 }
3754 
3755 /*
3756  * CMD_SET_RATEADAPT_MODE.
3757  */
3758 struct mwl8k_cmd_set_rate_adapt_mode {
3759 	struct mwl8k_cmd_pkt header;
3760 	__le16 action;
3761 	__le16 mode;
3762 } __packed;
3763 
3764 static int mwl8k_cmd_set_rateadapt_mode(struct ieee80211_hw *hw, __u16 mode)
3765 {
3766 	struct mwl8k_cmd_set_rate_adapt_mode *cmd;
3767 	int rc;
3768 
3769 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3770 	if (cmd == NULL)
3771 		return -ENOMEM;
3772 
3773 	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATEADAPT_MODE);
3774 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
3775 	cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3776 	cmd->mode = cpu_to_le16(mode);
3777 
3778 	rc = mwl8k_post_cmd(hw, &cmd->header);
3779 	kfree(cmd);
3780 
3781 	return rc;
3782 }
3783 
3784 /*
3785  * CMD_GET_WATCHDOG_BITMAP.
3786  */
3787 struct mwl8k_cmd_get_watchdog_bitmap {
3788 	struct mwl8k_cmd_pkt header;
3789 	u8	bitmap;
3790 } __packed;
3791 
3792 static int mwl8k_cmd_get_watchdog_bitmap(struct ieee80211_hw *hw, u8 *bitmap)
3793 {
3794 	struct mwl8k_cmd_get_watchdog_bitmap *cmd;
3795 	int rc;
3796 
3797 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3798 	if (cmd == NULL)
3799 		return -ENOMEM;
3800 
3801 	cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_WATCHDOG_BITMAP);
3802 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
3803 
3804 	rc = mwl8k_post_cmd(hw, &cmd->header);
3805 	if (!rc)
3806 		*bitmap = cmd->bitmap;
3807 
3808 	kfree(cmd);
3809 
3810 	return rc;
3811 }
3812 
3813 #define MWL8K_WMM_QUEUE_NUMBER	3
3814 
3815 static void mwl8k_destroy_ba(struct ieee80211_hw *hw,
3816 			     u8 idx);
3817 
3818 static void mwl8k_watchdog_ba_events(struct work_struct *work)
3819 {
3820 	int rc;
3821 	u8 bitmap = 0, stream_index;
3822 	struct mwl8k_ampdu_stream *streams;
3823 	struct mwl8k_priv *priv =
3824 		container_of(work, struct mwl8k_priv, watchdog_ba_handle);
3825 	struct ieee80211_hw *hw = priv->hw;
3826 	int i;
3827 	u32 status = 0;
3828 
3829 	mwl8k_fw_lock(hw);
3830 
3831 	rc = mwl8k_cmd_get_watchdog_bitmap(priv->hw, &bitmap);
3832 	if (rc)
3833 		goto done;
3834 
3835 	spin_lock(&priv->stream_lock);
3836 
3837 	/* the bitmap is the hw queue number.  Map it to the ampdu queue. */
3838 	for (i = 0; i < TOTAL_HW_TX_QUEUES; i++) {
3839 		if (bitmap & (1 << i)) {
3840 			stream_index = (i + MWL8K_WMM_QUEUE_NUMBER) %
3841 				       TOTAL_HW_TX_QUEUES;
3842 			streams = &priv->ampdu[stream_index];
3843 			if (streams->state == AMPDU_STREAM_ACTIVE) {
3844 				ieee80211_stop_tx_ba_session(streams->sta,
3845 							     streams->tid);
3846 				spin_unlock(&priv->stream_lock);
3847 				mwl8k_destroy_ba(hw, stream_index);
3848 				spin_lock(&priv->stream_lock);
3849 			}
3850 		}
3851 	}
3852 
3853 	spin_unlock(&priv->stream_lock);
3854 done:
3855 	atomic_dec(&priv->watchdog_event_pending);
3856 	status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
3857 	iowrite32((status | MWL8K_A2H_INT_BA_WATCHDOG),
3858 		  priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
3859 	mwl8k_fw_unlock(hw);
3860 	return;
3861 }
3862 
3863 
3864 /*
3865  * CMD_BSS_START.
3866  */
3867 struct mwl8k_cmd_bss_start {
3868 	struct mwl8k_cmd_pkt header;
3869 	__le32 enable;
3870 } __packed;
3871 
3872 static int mwl8k_cmd_bss_start(struct ieee80211_hw *hw,
3873 			       struct ieee80211_vif *vif, int enable)
3874 {
3875 	struct mwl8k_cmd_bss_start *cmd;
3876 	struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
3877 	struct mwl8k_priv *priv = hw->priv;
3878 	int rc;
3879 
3880 	if (enable && (priv->running_bsses & (1 << mwl8k_vif->macid)))
3881 		return 0;
3882 
3883 	if (!enable && !(priv->running_bsses & (1 << mwl8k_vif->macid)))
3884 		return 0;
3885 
3886 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3887 	if (cmd == NULL)
3888 		return -ENOMEM;
3889 
3890 	cmd->header.code = cpu_to_le16(MWL8K_CMD_BSS_START);
3891 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
3892 	cmd->enable = cpu_to_le32(enable);
3893 
3894 	rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3895 	kfree(cmd);
3896 
3897 	if (!rc) {
3898 		if (enable)
3899 			priv->running_bsses |= (1 << mwl8k_vif->macid);
3900 		else
3901 			priv->running_bsses &= ~(1 << mwl8k_vif->macid);
3902 	}
3903 	return rc;
3904 }
3905 
3906 static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable, u32 bitmap)
3907 {
3908 	struct mwl8k_priv *priv = hw->priv;
3909 	struct mwl8k_vif *mwl8k_vif, *tmp_vif;
3910 	struct ieee80211_vif *vif;
3911 
3912 	list_for_each_entry_safe(mwl8k_vif, tmp_vif, &priv->vif_list, list) {
3913 		vif = mwl8k_vif->vif;
3914 
3915 		if (!(bitmap & (1 << mwl8k_vif->macid)))
3916 			continue;
3917 
3918 		if (vif->type == NL80211_IFTYPE_AP)
3919 			mwl8k_cmd_bss_start(hw, vif, enable);
3920 	}
3921 }
3922 /*
3923  * CMD_BASTREAM.
3924  */
3925 
3926 /*
3927  * UPSTREAM is tx direction
3928  */
3929 #define BASTREAM_FLAG_DIRECTION_UPSTREAM	0x00
3930 #define BASTREAM_FLAG_IMMEDIATE_TYPE		0x01
3931 
3932 enum ba_stream_action_type {
3933 	MWL8K_BA_CREATE,
3934 	MWL8K_BA_UPDATE,
3935 	MWL8K_BA_DESTROY,
3936 	MWL8K_BA_FLUSH,
3937 	MWL8K_BA_CHECK,
3938 };
3939 
3940 
3941 struct mwl8k_create_ba_stream {
3942 	__le32	flags;
3943 	__le32	idle_thrs;
3944 	__le32	bar_thrs;
3945 	__le32	window_size;
3946 	u8	peer_mac_addr[6];
3947 	u8	dialog_token;
3948 	u8	tid;
3949 	u8	queue_id;
3950 	u8	param_info;
3951 	__le32	ba_context;
3952 	u8	reset_seq_no_flag;
3953 	__le16	curr_seq_no;
3954 	u8	sta_src_mac_addr[6];
3955 } __packed;
3956 
3957 struct mwl8k_destroy_ba_stream {
3958 	__le32	flags;
3959 	__le32	ba_context;
3960 } __packed;
3961 
3962 struct mwl8k_cmd_bastream {
3963 	struct mwl8k_cmd_pkt	header;
3964 	__le32	action;
3965 	union {
3966 		struct mwl8k_create_ba_stream	create_params;
3967 		struct mwl8k_destroy_ba_stream	destroy_params;
3968 	};
3969 } __packed;
3970 
3971 static int
3972 mwl8k_check_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream,
3973 	       struct ieee80211_vif *vif)
3974 {
3975 	struct mwl8k_cmd_bastream *cmd;
3976 	int rc;
3977 
3978 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3979 	if (cmd == NULL)
3980 		return -ENOMEM;
3981 
3982 	cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
3983 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
3984 
3985 	cmd->action = cpu_to_le32(MWL8K_BA_CHECK);
3986 
3987 	cmd->create_params.queue_id = stream->idx;
3988 	memcpy(&cmd->create_params.peer_mac_addr[0], stream->sta->addr,
3989 	       ETH_ALEN);
3990 	cmd->create_params.tid = stream->tid;
3991 
3992 	cmd->create_params.flags =
3993 		cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE) |
3994 		cpu_to_le32(BASTREAM_FLAG_DIRECTION_UPSTREAM);
3995 
3996 	rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3997 
3998 	kfree(cmd);
3999 
4000 	return rc;
4001 }
4002 
4003 static int
4004 mwl8k_create_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream,
4005 		u8 buf_size, struct ieee80211_vif *vif)
4006 {
4007 	struct mwl8k_cmd_bastream *cmd;
4008 	int rc;
4009 
4010 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4011 	if (cmd == NULL)
4012 		return -ENOMEM;
4013 
4014 
4015 	cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
4016 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
4017 
4018 	cmd->action = cpu_to_le32(MWL8K_BA_CREATE);
4019 
4020 	cmd->create_params.bar_thrs = cpu_to_le32((u32)buf_size);
4021 	cmd->create_params.window_size = cpu_to_le32((u32)buf_size);
4022 	cmd->create_params.queue_id = stream->idx;
4023 
4024 	memcpy(cmd->create_params.peer_mac_addr, stream->sta->addr, ETH_ALEN);
4025 	cmd->create_params.tid = stream->tid;
4026 	cmd->create_params.curr_seq_no = cpu_to_le16(0);
4027 	cmd->create_params.reset_seq_no_flag = 1;
4028 
4029 	cmd->create_params.param_info =
4030 		(stream->sta->deflink.ht_cap.ampdu_factor &
4031 		 IEEE80211_HT_AMPDU_PARM_FACTOR) |
4032 		((stream->sta->deflink.ht_cap.ampdu_density << 2) &
4033 		 IEEE80211_HT_AMPDU_PARM_DENSITY);
4034 
4035 	cmd->create_params.flags =
4036 		cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE |
4037 					BASTREAM_FLAG_DIRECTION_UPSTREAM);
4038 
4039 	rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4040 
4041 	wiphy_debug(hw->wiphy, "Created a BA stream for %pM : tid %d\n",
4042 		stream->sta->addr, stream->tid);
4043 	kfree(cmd);
4044 
4045 	return rc;
4046 }
4047 
4048 static void mwl8k_destroy_ba(struct ieee80211_hw *hw,
4049 			     u8 idx)
4050 {
4051 	struct mwl8k_cmd_bastream *cmd;
4052 
4053 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4054 	if (cmd == NULL)
4055 		return;
4056 
4057 	cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
4058 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
4059 	cmd->action = cpu_to_le32(MWL8K_BA_DESTROY);
4060 
4061 	cmd->destroy_params.ba_context = cpu_to_le32(idx);
4062 	mwl8k_post_cmd(hw, &cmd->header);
4063 
4064 	wiphy_debug(hw->wiphy, "Deleted BA stream index %d\n", idx);
4065 
4066 	kfree(cmd);
4067 }
4068 
4069 /*
4070  * CMD_SET_NEW_STN.
4071  */
4072 struct mwl8k_cmd_set_new_stn {
4073 	struct mwl8k_cmd_pkt header;
4074 	__le16 aid;
4075 	__u8 mac_addr[6];
4076 	__le16 stn_id;
4077 	__le16 action;
4078 	__le16 rsvd;
4079 	__le32 legacy_rates;
4080 	__u8 ht_rates[4];
4081 	__le16 cap_info;
4082 	__le16 ht_capabilities_info;
4083 	__u8 mac_ht_param_info;
4084 	__u8 rev;
4085 	__u8 control_channel;
4086 	__u8 add_channel;
4087 	__le16 op_mode;
4088 	__le16 stbc;
4089 	__u8 add_qos_info;
4090 	__u8 is_qos_sta;
4091 	__le32 fw_sta_ptr;
4092 } __packed;
4093 
4094 #define MWL8K_STA_ACTION_ADD		0
4095 #define MWL8K_STA_ACTION_REMOVE		2
4096 
4097 static int mwl8k_cmd_set_new_stn_add(struct ieee80211_hw *hw,
4098 				     struct ieee80211_vif *vif,
4099 				     struct ieee80211_sta *sta)
4100 {
4101 	struct mwl8k_cmd_set_new_stn *cmd;
4102 	u32 rates;
4103 	int rc;
4104 
4105 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4106 	if (cmd == NULL)
4107 		return -ENOMEM;
4108 
4109 	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4110 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
4111 	cmd->aid = cpu_to_le16(sta->aid);
4112 	memcpy(cmd->mac_addr, sta->addr, ETH_ALEN);
4113 	cmd->stn_id = cpu_to_le16(sta->aid);
4114 	cmd->action = cpu_to_le16(MWL8K_STA_ACTION_ADD);
4115 	if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
4116 		rates = sta->deflink.supp_rates[NL80211_BAND_2GHZ];
4117 	else
4118 		rates = sta->deflink.supp_rates[NL80211_BAND_5GHZ] << 5;
4119 	cmd->legacy_rates = cpu_to_le32(rates);
4120 	if (sta->deflink.ht_cap.ht_supported) {
4121 		cmd->ht_rates[0] = sta->deflink.ht_cap.mcs.rx_mask[0];
4122 		cmd->ht_rates[1] = sta->deflink.ht_cap.mcs.rx_mask[1];
4123 		cmd->ht_rates[2] = sta->deflink.ht_cap.mcs.rx_mask[2];
4124 		cmd->ht_rates[3] = sta->deflink.ht_cap.mcs.rx_mask[3];
4125 		cmd->ht_capabilities_info = cpu_to_le16(sta->deflink.ht_cap.cap);
4126 		cmd->mac_ht_param_info = (sta->deflink.ht_cap.ampdu_factor & 3) |
4127 			((sta->deflink.ht_cap.ampdu_density & 7) << 2);
4128 		cmd->is_qos_sta = 1;
4129 	}
4130 
4131 	rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4132 	kfree(cmd);
4133 
4134 	return rc;
4135 }
4136 
4137 static int mwl8k_cmd_set_new_stn_add_self(struct ieee80211_hw *hw,
4138 					  struct ieee80211_vif *vif)
4139 {
4140 	struct mwl8k_cmd_set_new_stn *cmd;
4141 	int rc;
4142 
4143 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4144 	if (cmd == NULL)
4145 		return -ENOMEM;
4146 
4147 	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4148 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
4149 	memcpy(cmd->mac_addr, vif->addr, ETH_ALEN);
4150 
4151 	rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4152 	kfree(cmd);
4153 
4154 	return rc;
4155 }
4156 
4157 static int mwl8k_cmd_set_new_stn_del(struct ieee80211_hw *hw,
4158 				     struct ieee80211_vif *vif, u8 *addr)
4159 {
4160 	struct mwl8k_cmd_set_new_stn *cmd;
4161 	struct mwl8k_priv *priv = hw->priv;
4162 	int rc, i;
4163 	u8 idx;
4164 
4165 	spin_lock(&priv->stream_lock);
4166 	/* Destroy any active ampdu streams for this sta */
4167 	for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
4168 		struct mwl8k_ampdu_stream *s;
4169 		s = &priv->ampdu[i];
4170 		if (s->state != AMPDU_NO_STREAM) {
4171 			if (memcmp(s->sta->addr, addr, ETH_ALEN) == 0) {
4172 				if (s->state == AMPDU_STREAM_ACTIVE) {
4173 					idx = s->idx;
4174 					spin_unlock(&priv->stream_lock);
4175 					mwl8k_destroy_ba(hw, idx);
4176 					spin_lock(&priv->stream_lock);
4177 				} else if (s->state == AMPDU_STREAM_NEW) {
4178 					mwl8k_remove_stream(hw, s);
4179 				}
4180 			}
4181 		}
4182 	}
4183 
4184 	spin_unlock(&priv->stream_lock);
4185 
4186 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4187 	if (cmd == NULL)
4188 		return -ENOMEM;
4189 
4190 	cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4191 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
4192 	memcpy(cmd->mac_addr, addr, ETH_ALEN);
4193 	cmd->action = cpu_to_le16(MWL8K_STA_ACTION_REMOVE);
4194 
4195 	rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4196 	kfree(cmd);
4197 
4198 	return rc;
4199 }
4200 
4201 /*
4202  * CMD_UPDATE_ENCRYPTION.
4203  */
4204 
4205 #define MAX_ENCR_KEY_LENGTH	16
4206 #define MIC_KEY_LENGTH		8
4207 
4208 struct mwl8k_cmd_update_encryption {
4209 	struct mwl8k_cmd_pkt header;
4210 
4211 	__le32 action;
4212 	__le32 reserved;
4213 	__u8 mac_addr[6];
4214 	__u8 encr_type;
4215 
4216 } __packed;
4217 
4218 struct mwl8k_cmd_set_key {
4219 	struct mwl8k_cmd_pkt header;
4220 
4221 	__le32 action;
4222 	__le32 reserved;
4223 	__le16 length;
4224 	__le16 key_type_id;
4225 	__le32 key_info;
4226 	__le32 key_id;
4227 	__le16 key_len;
4228 	struct {
4229 		__u8 key_material[MAX_ENCR_KEY_LENGTH];
4230 		__u8 tkip_tx_mic_key[MIC_KEY_LENGTH];
4231 		__u8 tkip_rx_mic_key[MIC_KEY_LENGTH];
4232 	} tkip;
4233 	__le16 tkip_rsc_low;
4234 	__le32 tkip_rsc_high;
4235 	__le16 tkip_tsc_low;
4236 	__le32 tkip_tsc_high;
4237 	__u8 mac_addr[6];
4238 } __packed;
4239 
4240 enum {
4241 	MWL8K_ENCR_ENABLE,
4242 	MWL8K_ENCR_SET_KEY,
4243 	MWL8K_ENCR_REMOVE_KEY,
4244 	MWL8K_ENCR_SET_GROUP_KEY,
4245 };
4246 
4247 #define MWL8K_UPDATE_ENCRYPTION_TYPE_WEP	0
4248 #define MWL8K_UPDATE_ENCRYPTION_TYPE_DISABLE	1
4249 #define MWL8K_UPDATE_ENCRYPTION_TYPE_TKIP	4
4250 #define MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED	7
4251 #define MWL8K_UPDATE_ENCRYPTION_TYPE_AES	8
4252 
4253 enum {
4254 	MWL8K_ALG_WEP,
4255 	MWL8K_ALG_TKIP,
4256 	MWL8K_ALG_CCMP,
4257 };
4258 
4259 #define MWL8K_KEY_FLAG_TXGROUPKEY	0x00000004
4260 #define MWL8K_KEY_FLAG_PAIRWISE		0x00000008
4261 #define MWL8K_KEY_FLAG_TSC_VALID	0x00000040
4262 #define MWL8K_KEY_FLAG_WEP_TXKEY	0x01000000
4263 #define MWL8K_KEY_FLAG_MICKEY_VALID	0x02000000
4264 
4265 static int mwl8k_cmd_update_encryption_enable(struct ieee80211_hw *hw,
4266 					      struct ieee80211_vif *vif,
4267 					      u8 *addr,
4268 					      u8 encr_type)
4269 {
4270 	struct mwl8k_cmd_update_encryption *cmd;
4271 	int rc;
4272 
4273 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4274 	if (cmd == NULL)
4275 		return -ENOMEM;
4276 
4277 	cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION);
4278 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
4279 	cmd->action = cpu_to_le32(MWL8K_ENCR_ENABLE);
4280 	memcpy(cmd->mac_addr, addr, ETH_ALEN);
4281 	cmd->encr_type = encr_type;
4282 
4283 	rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4284 	kfree(cmd);
4285 
4286 	return rc;
4287 }
4288 
4289 static int mwl8k_encryption_set_cmd_info(struct mwl8k_cmd_set_key *cmd,
4290 						u8 *addr,
4291 						struct ieee80211_key_conf *key)
4292 {
4293 	cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION);
4294 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
4295 	cmd->length = cpu_to_le16(sizeof(*cmd) -
4296 				offsetof(struct mwl8k_cmd_set_key, length));
4297 	cmd->key_id = cpu_to_le32(key->keyidx);
4298 	cmd->key_len = cpu_to_le16(key->keylen);
4299 	memcpy(cmd->mac_addr, addr, ETH_ALEN);
4300 
4301 	switch (key->cipher) {
4302 	case WLAN_CIPHER_SUITE_WEP40:
4303 	case WLAN_CIPHER_SUITE_WEP104:
4304 		cmd->key_type_id = cpu_to_le16(MWL8K_ALG_WEP);
4305 		if (key->keyidx == 0)
4306 			cmd->key_info =	cpu_to_le32(MWL8K_KEY_FLAG_WEP_TXKEY);
4307 
4308 		break;
4309 	case WLAN_CIPHER_SUITE_TKIP:
4310 		cmd->key_type_id = cpu_to_le16(MWL8K_ALG_TKIP);
4311 		cmd->key_info =	(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4312 			? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE)
4313 			: cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY);
4314 		cmd->key_info |= cpu_to_le32(MWL8K_KEY_FLAG_MICKEY_VALID
4315 						| MWL8K_KEY_FLAG_TSC_VALID);
4316 		break;
4317 	case WLAN_CIPHER_SUITE_CCMP:
4318 		cmd->key_type_id = cpu_to_le16(MWL8K_ALG_CCMP);
4319 		cmd->key_info =	(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4320 			? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE)
4321 			: cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY);
4322 		break;
4323 	default:
4324 		return -ENOTSUPP;
4325 	}
4326 
4327 	return 0;
4328 }
4329 
4330 static int mwl8k_cmd_encryption_set_key(struct ieee80211_hw *hw,
4331 						struct ieee80211_vif *vif,
4332 						u8 *addr,
4333 						struct ieee80211_key_conf *key)
4334 {
4335 	struct mwl8k_cmd_set_key *cmd;
4336 	int rc;
4337 	int keymlen;
4338 	u32 action;
4339 	u8 idx;
4340 	struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4341 
4342 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4343 	if (cmd == NULL)
4344 		return -ENOMEM;
4345 
4346 	rc = mwl8k_encryption_set_cmd_info(cmd, addr, key);
4347 	if (rc < 0)
4348 		goto done;
4349 
4350 	idx = key->keyidx;
4351 
4352 	if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4353 		action = MWL8K_ENCR_SET_KEY;
4354 	else
4355 		action = MWL8K_ENCR_SET_GROUP_KEY;
4356 
4357 	switch (key->cipher) {
4358 	case WLAN_CIPHER_SUITE_WEP40:
4359 	case WLAN_CIPHER_SUITE_WEP104:
4360 		if (!mwl8k_vif->wep_key_conf[idx].enabled) {
4361 			memcpy(mwl8k_vif->wep_key_conf[idx].key, key,
4362 						sizeof(*key) + key->keylen);
4363 			mwl8k_vif->wep_key_conf[idx].enabled = 1;
4364 		}
4365 
4366 		keymlen = key->keylen;
4367 		action = MWL8K_ENCR_SET_KEY;
4368 		break;
4369 	case WLAN_CIPHER_SUITE_TKIP:
4370 		keymlen = MAX_ENCR_KEY_LENGTH + 2 * MIC_KEY_LENGTH;
4371 		break;
4372 	case WLAN_CIPHER_SUITE_CCMP:
4373 		keymlen = key->keylen;
4374 		break;
4375 	default:
4376 		rc = -ENOTSUPP;
4377 		goto done;
4378 	}
4379 
4380 	memcpy(&cmd->tkip, key->key, keymlen);
4381 	cmd->action = cpu_to_le32(action);
4382 
4383 	rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4384 done:
4385 	kfree(cmd);
4386 
4387 	return rc;
4388 }
4389 
4390 static int mwl8k_cmd_encryption_remove_key(struct ieee80211_hw *hw,
4391 						struct ieee80211_vif *vif,
4392 						u8 *addr,
4393 						struct ieee80211_key_conf *key)
4394 {
4395 	struct mwl8k_cmd_set_key *cmd;
4396 	int rc;
4397 	struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4398 
4399 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4400 	if (cmd == NULL)
4401 		return -ENOMEM;
4402 
4403 	rc = mwl8k_encryption_set_cmd_info(cmd, addr, key);
4404 	if (rc < 0)
4405 		goto done;
4406 
4407 	if (key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
4408 			key->cipher == WLAN_CIPHER_SUITE_WEP104)
4409 		mwl8k_vif->wep_key_conf[key->keyidx].enabled = 0;
4410 
4411 	cmd->action = cpu_to_le32(MWL8K_ENCR_REMOVE_KEY);
4412 
4413 	rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4414 done:
4415 	kfree(cmd);
4416 
4417 	return rc;
4418 }
4419 
4420 static int mwl8k_set_key(struct ieee80211_hw *hw,
4421 			 enum set_key_cmd cmd_param,
4422 			 struct ieee80211_vif *vif,
4423 			 struct ieee80211_sta *sta,
4424 			 struct ieee80211_key_conf *key)
4425 {
4426 	int rc = 0;
4427 	u8 encr_type;
4428 	u8 *addr;
4429 	struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4430 	struct mwl8k_priv *priv = hw->priv;
4431 
4432 	if (vif->type == NL80211_IFTYPE_STATION && !priv->ap_fw)
4433 		return -EOPNOTSUPP;
4434 
4435 	if (sta == NULL)
4436 		addr = vif->addr;
4437 	else
4438 		addr = sta->addr;
4439 
4440 	if (cmd_param == SET_KEY) {
4441 		rc = mwl8k_cmd_encryption_set_key(hw, vif, addr, key);
4442 		if (rc)
4443 			goto out;
4444 
4445 		if ((key->cipher == WLAN_CIPHER_SUITE_WEP40)
4446 				|| (key->cipher == WLAN_CIPHER_SUITE_WEP104))
4447 			encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_WEP;
4448 		else
4449 			encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED;
4450 
4451 		rc = mwl8k_cmd_update_encryption_enable(hw, vif, addr,
4452 								encr_type);
4453 		if (rc)
4454 			goto out;
4455 
4456 		mwl8k_vif->is_hw_crypto_enabled = true;
4457 
4458 	} else {
4459 		rc = mwl8k_cmd_encryption_remove_key(hw, vif, addr, key);
4460 
4461 		if (rc)
4462 			goto out;
4463 	}
4464 out:
4465 	return rc;
4466 }
4467 
4468 /*
4469  * CMD_UPDATE_STADB.
4470  */
4471 struct ewc_ht_info {
4472 	__le16	control1;
4473 	__le16	control2;
4474 	__le16	control3;
4475 } __packed;
4476 
4477 struct peer_capability_info {
4478 	/* Peer type - AP vs. STA.  */
4479 	__u8	peer_type;
4480 
4481 	/* Basic 802.11 capabilities from assoc resp.  */
4482 	__le16	basic_caps;
4483 
4484 	/* Set if peer supports 802.11n high throughput (HT).  */
4485 	__u8	ht_support;
4486 
4487 	/* Valid if HT is supported.  */
4488 	__le16	ht_caps;
4489 	__u8	extended_ht_caps;
4490 	struct ewc_ht_info	ewc_info;
4491 
4492 	/* Legacy rate table. Intersection of our rates and peer rates.  */
4493 	__u8	legacy_rates[12];
4494 
4495 	/* HT rate table. Intersection of our rates and peer rates.  */
4496 	__u8	ht_rates[16];
4497 	__u8	pad[16];
4498 
4499 	/* If set, interoperability mode, no proprietary extensions.  */
4500 	__u8	interop;
4501 	__u8	pad2;
4502 	__u8	station_id;
4503 	__le16	amsdu_enabled;
4504 } __packed;
4505 
4506 struct mwl8k_cmd_update_stadb {
4507 	struct mwl8k_cmd_pkt header;
4508 
4509 	/* See STADB_ACTION_TYPE */
4510 	__le32	action;
4511 
4512 	/* Peer MAC address */
4513 	__u8	peer_addr[ETH_ALEN];
4514 
4515 	__le32	reserved;
4516 
4517 	/* Peer info - valid during add/update.  */
4518 	struct peer_capability_info	peer_info;
4519 } __packed;
4520 
4521 #define MWL8K_STA_DB_MODIFY_ENTRY	1
4522 #define MWL8K_STA_DB_DEL_ENTRY		2
4523 
4524 /* Peer Entry flags - used to define the type of the peer node */
4525 #define MWL8K_PEER_TYPE_ACCESSPOINT	2
4526 
4527 static int mwl8k_cmd_update_stadb_add(struct ieee80211_hw *hw,
4528 				      struct ieee80211_vif *vif,
4529 				      struct ieee80211_sta *sta)
4530 {
4531 	struct mwl8k_cmd_update_stadb *cmd;
4532 	struct peer_capability_info *p;
4533 	u32 rates;
4534 	int rc;
4535 
4536 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4537 	if (cmd == NULL)
4538 		return -ENOMEM;
4539 
4540 	cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
4541 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
4542 	cmd->action = cpu_to_le32(MWL8K_STA_DB_MODIFY_ENTRY);
4543 	memcpy(cmd->peer_addr, sta->addr, ETH_ALEN);
4544 
4545 	p = &cmd->peer_info;
4546 	p->peer_type = MWL8K_PEER_TYPE_ACCESSPOINT;
4547 	p->basic_caps = cpu_to_le16(vif->bss_conf.assoc_capability);
4548 	p->ht_support = sta->deflink.ht_cap.ht_supported;
4549 	p->ht_caps = cpu_to_le16(sta->deflink.ht_cap.cap);
4550 	p->extended_ht_caps = (sta->deflink.ht_cap.ampdu_factor & 3) |
4551 		((sta->deflink.ht_cap.ampdu_density & 7) << 2);
4552 	if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
4553 		rates = sta->deflink.supp_rates[NL80211_BAND_2GHZ];
4554 	else
4555 		rates = sta->deflink.supp_rates[NL80211_BAND_5GHZ] << 5;
4556 	legacy_rate_mask_to_array(p->legacy_rates, rates);
4557 	memcpy(p->ht_rates, &sta->deflink.ht_cap.mcs, 16);
4558 	p->interop = 1;
4559 	p->amsdu_enabled = 0;
4560 
4561 	rc = mwl8k_post_cmd(hw, &cmd->header);
4562 	if (!rc)
4563 		rc = p->station_id;
4564 	kfree(cmd);
4565 
4566 	return rc;
4567 }
4568 
4569 static int mwl8k_cmd_update_stadb_del(struct ieee80211_hw *hw,
4570 				      struct ieee80211_vif *vif, u8 *addr)
4571 {
4572 	struct mwl8k_cmd_update_stadb *cmd;
4573 	int rc;
4574 
4575 	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4576 	if (cmd == NULL)
4577 		return -ENOMEM;
4578 
4579 	cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
4580 	cmd->header.length = cpu_to_le16(sizeof(*cmd));
4581 	cmd->action = cpu_to_le32(MWL8K_STA_DB_DEL_ENTRY);
4582 	memcpy(cmd->peer_addr, addr, ETH_ALEN);
4583 
4584 	rc = mwl8k_post_cmd(hw, &cmd->header);
4585 	kfree(cmd);
4586 
4587 	return rc;
4588 }
4589 
4590 
4591 /*
4592  * Interrupt handling.
4593  */
4594 static irqreturn_t mwl8k_interrupt(int irq, void *dev_id)
4595 {
4596 	struct ieee80211_hw *hw = dev_id;
4597 	struct mwl8k_priv *priv = hw->priv;
4598 	u32 status;
4599 
4600 	status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4601 	if (!status)
4602 		return IRQ_NONE;
4603 
4604 	if (status & MWL8K_A2H_INT_TX_DONE) {
4605 		status &= ~MWL8K_A2H_INT_TX_DONE;
4606 		tasklet_schedule(&priv->poll_tx_task);
4607 	}
4608 
4609 	if (status & MWL8K_A2H_INT_RX_READY) {
4610 		status &= ~MWL8K_A2H_INT_RX_READY;
4611 		tasklet_schedule(&priv->poll_rx_task);
4612 	}
4613 
4614 	if (status & MWL8K_A2H_INT_BA_WATCHDOG) {
4615 		iowrite32(~MWL8K_A2H_INT_BA_WATCHDOG,
4616 			  priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
4617 
4618 		atomic_inc(&priv->watchdog_event_pending);
4619 		status &= ~MWL8K_A2H_INT_BA_WATCHDOG;
4620 		ieee80211_queue_work(hw, &priv->watchdog_ba_handle);
4621 	}
4622 
4623 	if (status)
4624 		iowrite32(~status, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4625 
4626 	if (status & MWL8K_A2H_INT_OPC_DONE) {
4627 		if (priv->hostcmd_wait != NULL)
4628 			complete(priv->hostcmd_wait);
4629 	}
4630 
4631 	if (status & MWL8K_A2H_INT_QUEUE_EMPTY) {
4632 		if (!mutex_is_locked(&priv->fw_mutex) &&
4633 		    priv->radio_on && priv->pending_tx_pkts)
4634 			mwl8k_tx_start(priv);
4635 	}
4636 
4637 	return IRQ_HANDLED;
4638 }
4639 
4640 static void mwl8k_tx_poll(struct tasklet_struct *t)
4641 {
4642 	struct mwl8k_priv *priv = from_tasklet(priv, t, poll_tx_task);
4643 	struct ieee80211_hw *hw = pci_get_drvdata(priv->pdev);
4644 	int limit;
4645 	int i;
4646 
4647 	limit = 32;
4648 
4649 	spin_lock(&priv->tx_lock);
4650 
4651 	for (i = 0; i < mwl8k_tx_queues(priv); i++)
4652 		limit -= mwl8k_txq_reclaim(hw, i, limit, 0);
4653 
4654 	if (!priv->pending_tx_pkts && priv->tx_wait != NULL) {
4655 		complete(priv->tx_wait);
4656 		priv->tx_wait = NULL;
4657 	}
4658 
4659 	spin_unlock(&priv->tx_lock);
4660 
4661 	if (limit) {
4662 		writel(~MWL8K_A2H_INT_TX_DONE,
4663 		       priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4664 	} else {
4665 		tasklet_schedule(&priv->poll_tx_task);
4666 	}
4667 }
4668 
4669 static void mwl8k_rx_poll(struct tasklet_struct *t)
4670 {
4671 	struct mwl8k_priv *priv = from_tasklet(priv, t, poll_rx_task);
4672 	struct ieee80211_hw *hw = pci_get_drvdata(priv->pdev);
4673 	int limit;
4674 
4675 	limit = 32;
4676 	limit -= rxq_process(hw, 0, limit);
4677 	limit -= rxq_refill(hw, 0, limit);
4678 
4679 	if (limit) {
4680 		writel(~MWL8K_A2H_INT_RX_READY,
4681 		       priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4682 	} else {
4683 		tasklet_schedule(&priv->poll_rx_task);
4684 	}
4685 }
4686 
4687 
4688 /*
4689  * Core driver operations.
4690  */
4691 static void mwl8k_tx(struct ieee80211_hw *hw,
4692 		     struct ieee80211_tx_control *control,
4693 		     struct sk_buff *skb)
4694 {
4695 	struct mwl8k_priv *priv = hw->priv;
4696 	int index = skb_get_queue_mapping(skb);
4697 
4698 	if (!priv->radio_on) {
4699 		wiphy_debug(hw->wiphy,
4700 			    "dropped TX frame since radio disabled\n");
4701 		dev_kfree_skb(skb);
4702 		return;
4703 	}
4704 
4705 	mwl8k_txq_xmit(hw, index, control->sta, skb);
4706 }
4707 
4708 static int mwl8k_start(struct ieee80211_hw *hw)
4709 {
4710 	struct mwl8k_priv *priv = hw->priv;
4711 	int rc;
4712 
4713 	rc = request_irq(priv->pdev->irq, mwl8k_interrupt,
4714 			 IRQF_SHARED, MWL8K_NAME, hw);
4715 	if (rc) {
4716 		priv->irq = -1;
4717 		wiphy_err(hw->wiphy, "failed to register IRQ handler\n");
4718 		return -EIO;
4719 	}
4720 	priv->irq = priv->pdev->irq;
4721 
4722 	/* Enable TX reclaim and RX tasklets.  */
4723 	tasklet_enable(&priv->poll_tx_task);
4724 	tasklet_enable(&priv->poll_rx_task);
4725 
4726 	/* Enable interrupts */
4727 	iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4728 	iowrite32(MWL8K_A2H_EVENTS,
4729 		  priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
4730 
4731 	rc = mwl8k_fw_lock(hw);
4732 	if (!rc) {
4733 		rc = mwl8k_cmd_radio_enable(hw);
4734 
4735 		if (!priv->ap_fw) {
4736 			if (!rc)
4737 				rc = mwl8k_cmd_enable_sniffer(hw, 0);
4738 
4739 			if (!rc)
4740 				rc = mwl8k_cmd_set_pre_scan(hw);
4741 
4742 			if (!rc)
4743 				rc = mwl8k_cmd_set_post_scan(hw,
4744 						"\x00\x00\x00\x00\x00\x00");
4745 		}
4746 
4747 		if (!rc)
4748 			rc = mwl8k_cmd_set_rateadapt_mode(hw, 0);
4749 
4750 		if (!rc)
4751 			rc = mwl8k_cmd_set_wmm_mode(hw, 0);
4752 
4753 		mwl8k_fw_unlock(hw);
4754 	}
4755 
4756 	if (rc) {
4757 		iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4758 		free_irq(priv->pdev->irq, hw);
4759 		priv->irq = -1;
4760 		tasklet_disable(&priv->poll_tx_task);
4761 		tasklet_disable(&priv->poll_rx_task);
4762 	} else {
4763 		ieee80211_wake_queues(hw);
4764 	}
4765 
4766 	return rc;
4767 }
4768 
4769 static void mwl8k_stop(struct ieee80211_hw *hw)
4770 {
4771 	struct mwl8k_priv *priv = hw->priv;
4772 	int i;
4773 
4774 	if (!priv->hw_restart_in_progress)
4775 		mwl8k_cmd_radio_disable(hw);
4776 
4777 	ieee80211_stop_queues(hw);
4778 
4779 	/* Disable interrupts */
4780 	iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4781 	if (priv->irq != -1) {
4782 		free_irq(priv->pdev->irq, hw);
4783 		priv->irq = -1;
4784 	}
4785 
4786 	/* Stop finalize join worker */
4787 	cancel_work_sync(&priv->finalize_join_worker);
4788 	cancel_work_sync(&priv->watchdog_ba_handle);
4789 	if (priv->beacon_skb != NULL)
4790 		dev_kfree_skb(priv->beacon_skb);
4791 
4792 	/* Stop TX reclaim and RX tasklets.  */
4793 	tasklet_disable(&priv->poll_tx_task);
4794 	tasklet_disable(&priv->poll_rx_task);
4795 
4796 	/* Return all skbs to mac80211 */
4797 	for (i = 0; i < mwl8k_tx_queues(priv); i++)
4798 		mwl8k_txq_reclaim(hw, i, INT_MAX, 1);
4799 }
4800 
4801 static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image);
4802 
4803 static int mwl8k_add_interface(struct ieee80211_hw *hw,
4804 			       struct ieee80211_vif *vif)
4805 {
4806 	struct mwl8k_priv *priv = hw->priv;
4807 	struct mwl8k_vif *mwl8k_vif;
4808 	u32 macids_supported;
4809 	int macid, rc;
4810 	struct mwl8k_device_info *di;
4811 
4812 	/*
4813 	 * Reject interface creation if sniffer mode is active, as
4814 	 * STA operation is mutually exclusive with hardware sniffer
4815 	 * mode.  (Sniffer mode is only used on STA firmware.)
4816 	 */
4817 	if (priv->sniffer_enabled) {
4818 		wiphy_info(hw->wiphy,
4819 			   "unable to create STA interface because sniffer mode is enabled\n");
4820 		return -EINVAL;
4821 	}
4822 
4823 	di = priv->device_info;
4824 	switch (vif->type) {
4825 	case NL80211_IFTYPE_AP:
4826 		if (!priv->ap_fw && di->fw_image_ap) {
4827 			/* we must load the ap fw to meet this request */
4828 			if (!list_empty(&priv->vif_list))
4829 				return -EBUSY;
4830 			rc = mwl8k_reload_firmware(hw, di->fw_image_ap);
4831 			if (rc)
4832 				return rc;
4833 		}
4834 		macids_supported = priv->ap_macids_supported;
4835 		break;
4836 	case NL80211_IFTYPE_STATION:
4837 		if (priv->ap_fw && di->fw_image_sta) {
4838 			if (!list_empty(&priv->vif_list)) {
4839 				wiphy_warn(hw->wiphy, "AP interface is running.\n"
4840 					   "Adding STA interface for WDS");
4841 			} else {
4842 				/* we must load the sta fw to
4843 				 * meet this request.
4844 				 */
4845 				rc = mwl8k_reload_firmware(hw,
4846 							   di->fw_image_sta);
4847 				if (rc)
4848 					return rc;
4849 			}
4850 		}
4851 		macids_supported = priv->sta_macids_supported;
4852 		break;
4853 	default:
4854 		return -EINVAL;
4855 	}
4856 
4857 	macid = ffs(macids_supported & ~priv->macids_used);
4858 	if (!macid--)
4859 		return -EBUSY;
4860 
4861 	/* Setup driver private area. */
4862 	mwl8k_vif = MWL8K_VIF(vif);
4863 	memset(mwl8k_vif, 0, sizeof(*mwl8k_vif));
4864 	mwl8k_vif->vif = vif;
4865 	mwl8k_vif->macid = macid;
4866 	mwl8k_vif->seqno = 0;
4867 	memcpy(mwl8k_vif->bssid, vif->addr, ETH_ALEN);
4868 	mwl8k_vif->is_hw_crypto_enabled = false;
4869 
4870 	/* Set the mac address.  */
4871 	mwl8k_cmd_set_mac_addr(hw, vif, vif->addr);
4872 
4873 	if (vif->type == NL80211_IFTYPE_AP)
4874 		mwl8k_cmd_set_new_stn_add_self(hw, vif);
4875 
4876 	priv->macids_used |= 1 << mwl8k_vif->macid;
4877 	list_add_tail(&mwl8k_vif->list, &priv->vif_list);
4878 
4879 	return 0;
4880 }
4881 
4882 static void mwl8k_remove_vif(struct mwl8k_priv *priv, struct mwl8k_vif *vif)
4883 {
4884 	/* Has ieee80211_restart_hw re-added the removed interfaces? */
4885 	if (!priv->macids_used)
4886 		return;
4887 
4888 	priv->macids_used &= ~(1 << vif->macid);
4889 	list_del(&vif->list);
4890 }
4891 
4892 static void mwl8k_remove_interface(struct ieee80211_hw *hw,
4893 				   struct ieee80211_vif *vif)
4894 {
4895 	struct mwl8k_priv *priv = hw->priv;
4896 	struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4897 
4898 	if (vif->type == NL80211_IFTYPE_AP)
4899 		mwl8k_cmd_set_new_stn_del(hw, vif, vif->addr);
4900 
4901 	mwl8k_cmd_del_mac_addr(hw, vif, vif->addr);
4902 
4903 	mwl8k_remove_vif(priv, mwl8k_vif);
4904 }
4905 
4906 static void mwl8k_hw_restart_work(struct work_struct *work)
4907 {
4908 	struct mwl8k_priv *priv =
4909 		container_of(work, struct mwl8k_priv, fw_reload);
4910 	struct ieee80211_hw *hw = priv->hw;
4911 	struct mwl8k_device_info *di;
4912 	int rc;
4913 
4914 	/* If some command is waiting for a response, clear it */
4915 	if (priv->hostcmd_wait != NULL) {
4916 		complete(priv->hostcmd_wait);
4917 		priv->hostcmd_wait = NULL;
4918 	}
4919 
4920 	priv->hw_restart_owner = current;
4921 	di = priv->device_info;
4922 	mwl8k_fw_lock(hw);
4923 
4924 	if (priv->ap_fw)
4925 		rc = mwl8k_reload_firmware(hw, di->fw_image_ap);
4926 	else
4927 		rc = mwl8k_reload_firmware(hw, di->fw_image_sta);
4928 
4929 	if (rc)
4930 		goto fail;
4931 
4932 	priv->hw_restart_owner = NULL;
4933 	priv->hw_restart_in_progress = false;
4934 
4935 	/*
4936 	 * This unlock will wake up the queues and
4937 	 * also opens the command path for other
4938 	 * commands
4939 	 */
4940 	mwl8k_fw_unlock(hw);
4941 
4942 	ieee80211_restart_hw(hw);
4943 
4944 	wiphy_err(hw->wiphy, "Firmware restarted successfully\n");
4945 
4946 	return;
4947 fail:
4948 	mwl8k_fw_unlock(hw);
4949 
4950 	wiphy_err(hw->wiphy, "Firmware restart failed\n");
4951 }
4952 
4953 static int mwl8k_config(struct ieee80211_hw *hw, u32 changed)
4954 {
4955 	struct ieee80211_conf *conf = &hw->conf;
4956 	struct mwl8k_priv *priv = hw->priv;
4957 	int rc;
4958 
4959 	rc = mwl8k_fw_lock(hw);
4960 	if (rc)
4961 		return rc;
4962 
4963 	if (conf->flags & IEEE80211_CONF_IDLE)
4964 		rc = mwl8k_cmd_radio_disable(hw);
4965 	else
4966 		rc = mwl8k_cmd_radio_enable(hw);
4967 	if (rc)
4968 		goto out;
4969 
4970 	if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
4971 		rc = mwl8k_cmd_set_rf_channel(hw, conf);
4972 		if (rc)
4973 			goto out;
4974 	}
4975 
4976 	if (conf->power_level > 18)
4977 		conf->power_level = 18;
4978 
4979 	if (priv->ap_fw) {
4980 
4981 		if (conf->flags & IEEE80211_CONF_CHANGE_POWER) {
4982 			rc = mwl8k_cmd_tx_power(hw, conf, conf->power_level);
4983 			if (rc)
4984 				goto out;
4985 		}
4986 
4987 
4988 	} else {
4989 		rc = mwl8k_cmd_rf_tx_power(hw, conf->power_level);
4990 		if (rc)
4991 			goto out;
4992 		rc = mwl8k_cmd_mimo_config(hw, 0x7, 0x7);
4993 	}
4994 
4995 out:
4996 	mwl8k_fw_unlock(hw);
4997 
4998 	return rc;
4999 }
5000 
5001 static void
5002 mwl8k_bss_info_changed_sta(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5003 			   struct ieee80211_bss_conf *info, u32 changed)
5004 {
5005 	struct mwl8k_priv *priv = hw->priv;
5006 	u32 ap_legacy_rates = 0;
5007 	u8 ap_mcs_rates[16];
5008 	int rc;
5009 
5010 	if (mwl8k_fw_lock(hw))
5011 		return;
5012 
5013 	/*
5014 	 * No need to capture a beacon if we're no longer associated.
5015 	 */
5016 	if ((changed & BSS_CHANGED_ASSOC) && !vif->cfg.assoc)
5017 		priv->capture_beacon = false;
5018 
5019 	/*
5020 	 * Get the AP's legacy and MCS rates.
5021 	 */
5022 	if (vif->cfg.assoc) {
5023 		struct ieee80211_sta *ap;
5024 
5025 		rcu_read_lock();
5026 
5027 		ap = ieee80211_find_sta(vif, vif->bss_conf.bssid);
5028 		if (ap == NULL) {
5029 			rcu_read_unlock();
5030 			goto out;
5031 		}
5032 
5033 		if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ) {
5034 			ap_legacy_rates = ap->deflink.supp_rates[NL80211_BAND_2GHZ];
5035 		} else {
5036 			ap_legacy_rates =
5037 				ap->deflink.supp_rates[NL80211_BAND_5GHZ] << 5;
5038 		}
5039 		memcpy(ap_mcs_rates, &ap->deflink.ht_cap.mcs, 16);
5040 
5041 		rcu_read_unlock();
5042 
5043 		if (changed & BSS_CHANGED_ASSOC) {
5044 			if (!priv->ap_fw) {
5045 				rc = mwl8k_cmd_set_rate(hw, vif,
5046 							ap_legacy_rates,
5047 							ap_mcs_rates);
5048 				if (rc)
5049 					goto out;
5050 
5051 				rc = mwl8k_cmd_use_fixed_rate_sta(hw);
5052 				if (rc)
5053 					goto out;
5054 			} else {
5055 				int idx;
5056 				int rate;
5057 
5058 				/* Use AP firmware specific rate command.
5059 				 */
5060 				idx = ffs(vif->bss_conf.basic_rates);
5061 				if (idx)
5062 					idx--;
5063 
5064 				if (hw->conf.chandef.chan->band ==
5065 				    NL80211_BAND_2GHZ)
5066 					rate = mwl8k_rates_24[idx].hw_value;
5067 				else
5068 					rate = mwl8k_rates_50[idx].hw_value;
5069 
5070 				mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate);
5071 			}
5072 		}
5073 	}
5074 
5075 	if (changed & BSS_CHANGED_ERP_PREAMBLE) {
5076 		rc = mwl8k_set_radio_preamble(hw,
5077 				vif->bss_conf.use_short_preamble);
5078 		if (rc)
5079 			goto out;
5080 	}
5081 
5082 	if ((changed & BSS_CHANGED_ERP_SLOT) && !priv->ap_fw)  {
5083 		rc = mwl8k_cmd_set_slot(hw, vif->bss_conf.use_short_slot);
5084 		if (rc)
5085 			goto out;
5086 	}
5087 
5088 	if (vif->cfg.assoc && !priv->ap_fw &&
5089 	    (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_CTS_PROT |
5090 			BSS_CHANGED_HT))) {
5091 		rc = mwl8k_cmd_set_aid(hw, vif, ap_legacy_rates);
5092 		if (rc)
5093 			goto out;
5094 	}
5095 
5096 	if (vif->cfg.assoc &&
5097 	    (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_BEACON_INT))) {
5098 		/*
5099 		 * Finalize the join.  Tell rx handler to process
5100 		 * next beacon from our BSSID.
5101 		 */
5102 		memcpy(priv->capture_bssid, vif->bss_conf.bssid, ETH_ALEN);
5103 		priv->capture_beacon = true;
5104 	}
5105 
5106 out:
5107 	mwl8k_fw_unlock(hw);
5108 }
5109 
5110 static void
5111 mwl8k_bss_info_changed_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5112 			  struct ieee80211_bss_conf *info, u32 changed)
5113 {
5114 	int rc;
5115 
5116 	if (mwl8k_fw_lock(hw))
5117 		return;
5118 
5119 	if (changed & BSS_CHANGED_ERP_PREAMBLE) {
5120 		rc = mwl8k_set_radio_preamble(hw,
5121 				vif->bss_conf.use_short_preamble);
5122 		if (rc)
5123 			goto out;
5124 	}
5125 
5126 	if (changed & BSS_CHANGED_BASIC_RATES) {
5127 		int idx;
5128 		int rate;
5129 
5130 		/*
5131 		 * Use lowest supported basic rate for multicasts
5132 		 * and management frames (such as probe responses --
5133 		 * beacons will always go out at 1 Mb/s).
5134 		 */
5135 		idx = ffs(vif->bss_conf.basic_rates);
5136 		if (idx)
5137 			idx--;
5138 
5139 		if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
5140 			rate = mwl8k_rates_24[idx].hw_value;
5141 		else
5142 			rate = mwl8k_rates_50[idx].hw_value;
5143 
5144 		mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate);
5145 	}
5146 
5147 	if (changed & (BSS_CHANGED_BEACON_INT | BSS_CHANGED_BEACON)) {
5148 		struct sk_buff *skb;
5149 
5150 		skb = ieee80211_beacon_get(hw, vif, 0);
5151 		if (skb != NULL) {
5152 			mwl8k_cmd_set_beacon(hw, vif, skb->data, skb->len);
5153 			kfree_skb(skb);
5154 		}
5155 	}
5156 
5157 	if (changed & BSS_CHANGED_BEACON_ENABLED)
5158 		mwl8k_cmd_bss_start(hw, vif, info->enable_beacon);
5159 
5160 out:
5161 	mwl8k_fw_unlock(hw);
5162 }
5163 
5164 static void
5165 mwl8k_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5166 		       struct ieee80211_bss_conf *info, u64 changed)
5167 {
5168 	if (vif->type == NL80211_IFTYPE_STATION)
5169 		mwl8k_bss_info_changed_sta(hw, vif, info, changed);
5170 	if (vif->type == NL80211_IFTYPE_AP)
5171 		mwl8k_bss_info_changed_ap(hw, vif, info, changed);
5172 }
5173 
5174 static u64 mwl8k_prepare_multicast(struct ieee80211_hw *hw,
5175 				   struct netdev_hw_addr_list *mc_list)
5176 {
5177 	struct mwl8k_cmd_pkt *cmd;
5178 
5179 	/*
5180 	 * Synthesize and return a command packet that programs the
5181 	 * hardware multicast address filter.  At this point we don't
5182 	 * know whether FIF_ALLMULTI is being requested, but if it is,
5183 	 * we'll end up throwing this packet away and creating a new
5184 	 * one in mwl8k_configure_filter().
5185 	 */
5186 	cmd = __mwl8k_cmd_mac_multicast_adr(hw, 0, mc_list);
5187 
5188 	return (unsigned long)cmd;
5189 }
5190 
5191 static int
5192 mwl8k_configure_filter_sniffer(struct ieee80211_hw *hw,
5193 			       unsigned int changed_flags,
5194 			       unsigned int *total_flags)
5195 {
5196 	struct mwl8k_priv *priv = hw->priv;
5197 
5198 	/*
5199 	 * Hardware sniffer mode is mutually exclusive with STA
5200 	 * operation, so refuse to enable sniffer mode if a STA
5201 	 * interface is active.
5202 	 */
5203 	if (!list_empty(&priv->vif_list)) {
5204 		if (net_ratelimit())
5205 			wiphy_info(hw->wiphy,
5206 				   "not enabling sniffer mode because STA interface is active\n");
5207 		return 0;
5208 	}
5209 
5210 	if (!priv->sniffer_enabled) {
5211 		if (mwl8k_cmd_enable_sniffer(hw, 1))
5212 			return 0;
5213 		priv->sniffer_enabled = true;
5214 	}
5215 
5216 	*total_flags &=	FIF_ALLMULTI |
5217 			FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL |
5218 			FIF_OTHER_BSS;
5219 
5220 	return 1;
5221 }
5222 
5223 static struct mwl8k_vif *mwl8k_first_vif(struct mwl8k_priv *priv)
5224 {
5225 	if (!list_empty(&priv->vif_list))
5226 		return list_entry(priv->vif_list.next, struct mwl8k_vif, list);
5227 
5228 	return NULL;
5229 }
5230 
5231 static void mwl8k_configure_filter(struct ieee80211_hw *hw,
5232 				   unsigned int changed_flags,
5233 				   unsigned int *total_flags,
5234 				   u64 multicast)
5235 {
5236 	struct mwl8k_priv *priv = hw->priv;
5237 	struct mwl8k_cmd_pkt *cmd = (void *)(unsigned long)multicast;
5238 
5239 	/*
5240 	 * AP firmware doesn't allow fine-grained control over
5241 	 * the receive filter.
5242 	 */
5243 	if (priv->ap_fw) {
5244 		*total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC;
5245 		kfree(cmd);
5246 		return;
5247 	}
5248 
5249 	/*
5250 	 * Enable hardware sniffer mode if FIF_CONTROL or
5251 	 * FIF_OTHER_BSS is requested.
5252 	 */
5253 	if (*total_flags & (FIF_CONTROL | FIF_OTHER_BSS) &&
5254 	    mwl8k_configure_filter_sniffer(hw, changed_flags, total_flags)) {
5255 		kfree(cmd);
5256 		return;
5257 	}
5258 
5259 	/* Clear unsupported feature flags */
5260 	*total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC;
5261 
5262 	if (mwl8k_fw_lock(hw)) {
5263 		kfree(cmd);
5264 		return;
5265 	}
5266 
5267 	if (priv->sniffer_enabled) {
5268 		mwl8k_cmd_enable_sniffer(hw, 0);
5269 		priv->sniffer_enabled = false;
5270 	}
5271 
5272 	if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
5273 		if (*total_flags & FIF_BCN_PRBRESP_PROMISC) {
5274 			/*
5275 			 * Disable the BSS filter.
5276 			 */
5277 			mwl8k_cmd_set_pre_scan(hw);
5278 		} else {
5279 			struct mwl8k_vif *mwl8k_vif;
5280 			const u8 *bssid;
5281 
5282 			/*
5283 			 * Enable the BSS filter.
5284 			 *
5285 			 * If there is an active STA interface, use that
5286 			 * interface's BSSID, otherwise use a dummy one
5287 			 * (where the OUI part needs to be nonzero for
5288 			 * the BSSID to be accepted by POST_SCAN).
5289 			 */
5290 			mwl8k_vif = mwl8k_first_vif(priv);
5291 			if (mwl8k_vif != NULL)
5292 				bssid = mwl8k_vif->vif->bss_conf.bssid;
5293 			else
5294 				bssid = "\x01\x00\x00\x00\x00\x00";
5295 
5296 			mwl8k_cmd_set_post_scan(hw, bssid);
5297 		}
5298 	}
5299 
5300 	/*
5301 	 * If FIF_ALLMULTI is being requested, throw away the command
5302 	 * packet that ->prepare_multicast() built and replace it with
5303 	 * a command packet that enables reception of all multicast
5304 	 * packets.
5305 	 */
5306 	if (*total_flags & FIF_ALLMULTI) {
5307 		kfree(cmd);
5308 		cmd = __mwl8k_cmd_mac_multicast_adr(hw, 1, NULL);
5309 	}
5310 
5311 	if (cmd != NULL) {
5312 		mwl8k_post_cmd(hw, cmd);
5313 		kfree(cmd);
5314 	}
5315 
5316 	mwl8k_fw_unlock(hw);
5317 }
5318 
5319 static int mwl8k_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
5320 {
5321 	return mwl8k_cmd_set_rts_threshold(hw, value);
5322 }
5323 
5324 static int mwl8k_sta_remove(struct ieee80211_hw *hw,
5325 			    struct ieee80211_vif *vif,
5326 			    struct ieee80211_sta *sta)
5327 {
5328 	struct mwl8k_priv *priv = hw->priv;
5329 
5330 	if (priv->ap_fw)
5331 		return mwl8k_cmd_set_new_stn_del(hw, vif, sta->addr);
5332 	else
5333 		return mwl8k_cmd_update_stadb_del(hw, vif, sta->addr);
5334 }
5335 
5336 static int mwl8k_sta_add(struct ieee80211_hw *hw,
5337 			 struct ieee80211_vif *vif,
5338 			 struct ieee80211_sta *sta)
5339 {
5340 	struct mwl8k_priv *priv = hw->priv;
5341 	int ret;
5342 	int i;
5343 	struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
5344 	struct ieee80211_key_conf *key;
5345 
5346 	if (!priv->ap_fw) {
5347 		ret = mwl8k_cmd_update_stadb_add(hw, vif, sta);
5348 		if (ret >= 0) {
5349 			MWL8K_STA(sta)->peer_id = ret;
5350 			if (sta->deflink.ht_cap.ht_supported)
5351 				MWL8K_STA(sta)->is_ampdu_allowed = true;
5352 			ret = 0;
5353 		}
5354 
5355 	} else {
5356 		ret = mwl8k_cmd_set_new_stn_add(hw, vif, sta);
5357 	}
5358 
5359 	for (i = 0; i < NUM_WEP_KEYS; i++) {
5360 		key = IEEE80211_KEY_CONF(mwl8k_vif->wep_key_conf[i].key);
5361 		if (mwl8k_vif->wep_key_conf[i].enabled)
5362 			mwl8k_set_key(hw, SET_KEY, vif, sta, key);
5363 	}
5364 	return ret;
5365 }
5366 
5367 static int mwl8k_conf_tx(struct ieee80211_hw *hw,
5368 			 struct ieee80211_vif *vif,
5369 			 unsigned int link_id, u16 queue,
5370 			 const struct ieee80211_tx_queue_params *params)
5371 {
5372 	struct mwl8k_priv *priv = hw->priv;
5373 	int rc;
5374 
5375 	rc = mwl8k_fw_lock(hw);
5376 	if (!rc) {
5377 		BUG_ON(queue > MWL8K_TX_WMM_QUEUES - 1);
5378 		memcpy(&priv->wmm_params[queue], params, sizeof(*params));
5379 
5380 		if (!priv->wmm_enabled)
5381 			rc = mwl8k_cmd_set_wmm_mode(hw, 1);
5382 
5383 		if (!rc) {
5384 			int q = MWL8K_TX_WMM_QUEUES - 1 - queue;
5385 			rc = mwl8k_cmd_set_edca_params(hw, q,
5386 						       params->cw_min,
5387 						       params->cw_max,
5388 						       params->aifs,
5389 						       params->txop);
5390 		}
5391 
5392 		mwl8k_fw_unlock(hw);
5393 	}
5394 
5395 	return rc;
5396 }
5397 
5398 static int mwl8k_get_stats(struct ieee80211_hw *hw,
5399 			   struct ieee80211_low_level_stats *stats)
5400 {
5401 	return mwl8k_cmd_get_stat(hw, stats);
5402 }
5403 
5404 static int mwl8k_get_survey(struct ieee80211_hw *hw, int idx,
5405 				struct survey_info *survey)
5406 {
5407 	struct mwl8k_priv *priv = hw->priv;
5408 	struct ieee80211_conf *conf = &hw->conf;
5409 	struct ieee80211_supported_band *sband;
5410 
5411 	if (priv->ap_fw) {
5412 		sband = hw->wiphy->bands[NL80211_BAND_2GHZ];
5413 
5414 		if (sband && idx >= sband->n_channels) {
5415 			idx -= sband->n_channels;
5416 			sband = NULL;
5417 		}
5418 
5419 		if (!sband)
5420 			sband = hw->wiphy->bands[NL80211_BAND_5GHZ];
5421 
5422 		if (!sband || idx >= sband->n_channels)
5423 			return -ENOENT;
5424 
5425 		memcpy(survey, &priv->survey[idx], sizeof(*survey));
5426 		survey->channel = &sband->channels[idx];
5427 
5428 		return 0;
5429 	}
5430 
5431 	if (idx != 0)
5432 		return -ENOENT;
5433 
5434 	survey->channel = conf->chandef.chan;
5435 	survey->filled = SURVEY_INFO_NOISE_DBM;
5436 	survey->noise = priv->noise;
5437 
5438 	return 0;
5439 }
5440 
5441 #define MAX_AMPDU_ATTEMPTS 5
5442 
5443 static int
5444 mwl8k_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5445 		   struct ieee80211_ampdu_params *params)
5446 {
5447 	struct ieee80211_sta *sta = params->sta;
5448 	enum ieee80211_ampdu_mlme_action action = params->action;
5449 	u16 tid = params->tid;
5450 	u16 *ssn = &params->ssn;
5451 	u8 buf_size = params->buf_size;
5452 	int i, rc = 0;
5453 	struct mwl8k_priv *priv = hw->priv;
5454 	struct mwl8k_ampdu_stream *stream;
5455 	u8 *addr = sta->addr, idx;
5456 	struct mwl8k_sta *sta_info = MWL8K_STA(sta);
5457 
5458 	if (!ieee80211_hw_check(hw, AMPDU_AGGREGATION))
5459 		return -ENOTSUPP;
5460 
5461 	spin_lock(&priv->stream_lock);
5462 	stream = mwl8k_lookup_stream(hw, addr, tid);
5463 
5464 	switch (action) {
5465 	case IEEE80211_AMPDU_RX_START:
5466 	case IEEE80211_AMPDU_RX_STOP:
5467 		break;
5468 	case IEEE80211_AMPDU_TX_START:
5469 		/* By the time we get here the hw queues may contain outgoing
5470 		 * packets for this RA/TID that are not part of this BA
5471 		 * session.  The hw will assign sequence numbers to these
5472 		 * packets as they go out.  So if we query the hw for its next
5473 		 * sequence number and use that for the SSN here, it may end up
5474 		 * being wrong, which will lead to sequence number mismatch at
5475 		 * the recipient.  To avoid this, we reset the sequence number
5476 		 * to O for the first MPDU in this BA stream.
5477 		 */
5478 		*ssn = 0;
5479 		if (stream == NULL) {
5480 			/* This means that somebody outside this driver called
5481 			 * ieee80211_start_tx_ba_session.  This is unexpected
5482 			 * because we do our own rate control.  Just warn and
5483 			 * move on.
5484 			 */
5485 			wiphy_warn(hw->wiphy, "Unexpected call to %s.  "
5486 				   "Proceeding anyway.\n", __func__);
5487 			stream = mwl8k_add_stream(hw, sta, tid);
5488 		}
5489 		if (stream == NULL) {
5490 			wiphy_debug(hw->wiphy, "no free AMPDU streams\n");
5491 			rc = -EBUSY;
5492 			break;
5493 		}
5494 		stream->state = AMPDU_STREAM_IN_PROGRESS;
5495 
5496 		/* Release the lock before we do the time consuming stuff */
5497 		spin_unlock(&priv->stream_lock);
5498 		for (i = 0; i < MAX_AMPDU_ATTEMPTS; i++) {
5499 
5500 			/* Check if link is still valid */
5501 			if (!sta_info->is_ampdu_allowed) {
5502 				spin_lock(&priv->stream_lock);
5503 				mwl8k_remove_stream(hw, stream);
5504 				spin_unlock(&priv->stream_lock);
5505 				return -EBUSY;
5506 			}
5507 
5508 			rc = mwl8k_check_ba(hw, stream, vif);
5509 
5510 			/* If HW restart is in progress mwl8k_post_cmd will
5511 			 * return -EBUSY. Avoid retrying mwl8k_check_ba in
5512 			 * such cases
5513 			 */
5514 			if (!rc || rc == -EBUSY)
5515 				break;
5516 			/*
5517 			 * HW queues take time to be flushed, give them
5518 			 * sufficient time
5519 			 */
5520 
5521 			msleep(1000);
5522 		}
5523 		spin_lock(&priv->stream_lock);
5524 		if (rc) {
5525 			wiphy_err(hw->wiphy, "Stream for tid %d busy after %d"
5526 				" attempts\n", tid, MAX_AMPDU_ATTEMPTS);
5527 			mwl8k_remove_stream(hw, stream);
5528 			rc = -EBUSY;
5529 			break;
5530 		}
5531 		rc = IEEE80211_AMPDU_TX_START_IMMEDIATE;
5532 		break;
5533 	case IEEE80211_AMPDU_TX_STOP_CONT:
5534 	case IEEE80211_AMPDU_TX_STOP_FLUSH:
5535 	case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
5536 		if (stream) {
5537 			if (stream->state == AMPDU_STREAM_ACTIVE) {
5538 				idx = stream->idx;
5539 				spin_unlock(&priv->stream_lock);
5540 				mwl8k_destroy_ba(hw, idx);
5541 				spin_lock(&priv->stream_lock);
5542 			}
5543 			mwl8k_remove_stream(hw, stream);
5544 		}
5545 		ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
5546 		break;
5547 	case IEEE80211_AMPDU_TX_OPERATIONAL:
5548 		BUG_ON(stream == NULL);
5549 		BUG_ON(stream->state != AMPDU_STREAM_IN_PROGRESS);
5550 		spin_unlock(&priv->stream_lock);
5551 		rc = mwl8k_create_ba(hw, stream, buf_size, vif);
5552 		spin_lock(&priv->stream_lock);
5553 		if (!rc)
5554 			stream->state = AMPDU_STREAM_ACTIVE;
5555 		else {
5556 			idx = stream->idx;
5557 			spin_unlock(&priv->stream_lock);
5558 			mwl8k_destroy_ba(hw, idx);
5559 			spin_lock(&priv->stream_lock);
5560 			wiphy_debug(hw->wiphy,
5561 				"Failed adding stream for sta %pM tid %d\n",
5562 				addr, tid);
5563 			mwl8k_remove_stream(hw, stream);
5564 		}
5565 		break;
5566 
5567 	default:
5568 		rc = -ENOTSUPP;
5569 	}
5570 
5571 	spin_unlock(&priv->stream_lock);
5572 	return rc;
5573 }
5574 
5575 static void mwl8k_sw_scan_start(struct ieee80211_hw *hw,
5576 				struct ieee80211_vif *vif,
5577 				const u8 *mac_addr)
5578 {
5579 	struct mwl8k_priv *priv = hw->priv;
5580 	u8 tmp;
5581 
5582 	if (!priv->ap_fw)
5583 		return;
5584 
5585 	/* clear all stats */
5586 	priv->channel_time = 0;
5587 	ioread32(priv->regs + BBU_RXRDY_CNT_REG);
5588 	ioread32(priv->regs + NOK_CCA_CNT_REG);
5589 	mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &tmp);
5590 
5591 	priv->sw_scan_start = true;
5592 }
5593 
5594 static void mwl8k_sw_scan_complete(struct ieee80211_hw *hw,
5595 				   struct ieee80211_vif *vif)
5596 {
5597 	struct mwl8k_priv *priv = hw->priv;
5598 	u8 tmp;
5599 
5600 	if (!priv->ap_fw)
5601 		return;
5602 
5603 	priv->sw_scan_start = false;
5604 
5605 	/* clear all stats */
5606 	priv->channel_time = 0;
5607 	ioread32(priv->regs + BBU_RXRDY_CNT_REG);
5608 	ioread32(priv->regs + NOK_CCA_CNT_REG);
5609 	mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &tmp);
5610 }
5611 
5612 static const struct ieee80211_ops mwl8k_ops = {
5613 	.tx			= mwl8k_tx,
5614 	.wake_tx_queue		= ieee80211_handle_wake_tx_queue,
5615 	.start			= mwl8k_start,
5616 	.stop			= mwl8k_stop,
5617 	.add_interface		= mwl8k_add_interface,
5618 	.remove_interface	= mwl8k_remove_interface,
5619 	.config			= mwl8k_config,
5620 	.bss_info_changed	= mwl8k_bss_info_changed,
5621 	.prepare_multicast	= mwl8k_prepare_multicast,
5622 	.configure_filter	= mwl8k_configure_filter,
5623 	.set_key                = mwl8k_set_key,
5624 	.set_rts_threshold	= mwl8k_set_rts_threshold,
5625 	.sta_add		= mwl8k_sta_add,
5626 	.sta_remove		= mwl8k_sta_remove,
5627 	.conf_tx		= mwl8k_conf_tx,
5628 	.get_stats		= mwl8k_get_stats,
5629 	.get_survey		= mwl8k_get_survey,
5630 	.ampdu_action		= mwl8k_ampdu_action,
5631 	.sw_scan_start		= mwl8k_sw_scan_start,
5632 	.sw_scan_complete	= mwl8k_sw_scan_complete,
5633 };
5634 
5635 static void mwl8k_finalize_join_worker(struct work_struct *work)
5636 {
5637 	struct mwl8k_priv *priv =
5638 		container_of(work, struct mwl8k_priv, finalize_join_worker);
5639 	struct sk_buff *skb = priv->beacon_skb;
5640 	struct ieee80211_mgmt *mgmt = (void *)skb->data;
5641 	int len = skb->len - offsetof(struct ieee80211_mgmt, u.beacon.variable);
5642 	const u8 *tim = cfg80211_find_ie(WLAN_EID_TIM,
5643 					 mgmt->u.beacon.variable, len);
5644 	int dtim_period = 1;
5645 
5646 	if (tim && tim[1] >= 2)
5647 		dtim_period = tim[3];
5648 
5649 	mwl8k_cmd_finalize_join(priv->hw, skb->data, skb->len, dtim_period);
5650 
5651 	dev_kfree_skb(skb);
5652 	priv->beacon_skb = NULL;
5653 }
5654 
5655 enum {
5656 	MWL8363 = 0,
5657 	MWL8687,
5658 	MWL8366,
5659 	MWL8764,
5660 };
5661 
5662 #define MWL8K_8366_AP_FW_API 3
5663 #define _MWL8K_8366_AP_FW(api) "mwl8k/fmimage_8366_ap-" #api ".fw"
5664 #define MWL8K_8366_AP_FW(api) _MWL8K_8366_AP_FW(api)
5665 
5666 #define MWL8K_8764_AP_FW_API 1
5667 #define _MWL8K_8764_AP_FW(api) "mwl8k/fmimage_8764_ap-" #api ".fw"
5668 #define MWL8K_8764_AP_FW(api) _MWL8K_8764_AP_FW(api)
5669 
5670 static struct mwl8k_device_info mwl8k_info_tbl[] = {
5671 	[MWL8363] = {
5672 		.part_name	= "88w8363",
5673 		.helper_image	= "mwl8k/helper_8363.fw",
5674 		.fw_image_sta	= "mwl8k/fmimage_8363.fw",
5675 	},
5676 	[MWL8687] = {
5677 		.part_name	= "88w8687",
5678 		.helper_image	= "mwl8k/helper_8687.fw",
5679 		.fw_image_sta	= "mwl8k/fmimage_8687.fw",
5680 	},
5681 	[MWL8366] = {
5682 		.part_name	= "88w8366",
5683 		.helper_image	= "mwl8k/helper_8366.fw",
5684 		.fw_image_sta	= "mwl8k/fmimage_8366.fw",
5685 		.fw_image_ap	= MWL8K_8366_AP_FW(MWL8K_8366_AP_FW_API),
5686 		.fw_api_ap	= MWL8K_8366_AP_FW_API,
5687 		.ap_rxd_ops	= &rxd_ap_ops,
5688 	},
5689 	[MWL8764] = {
5690 		.part_name	= "88w8764",
5691 		.fw_image_ap	= MWL8K_8764_AP_FW(MWL8K_8764_AP_FW_API),
5692 		.fw_api_ap	= MWL8K_8764_AP_FW_API,
5693 		.ap_rxd_ops	= &rxd_ap_ops,
5694 	},
5695 };
5696 
5697 MODULE_FIRMWARE("mwl8k/helper_8363.fw");
5698 MODULE_FIRMWARE("mwl8k/fmimage_8363.fw");
5699 MODULE_FIRMWARE("mwl8k/helper_8687.fw");
5700 MODULE_FIRMWARE("mwl8k/fmimage_8687.fw");
5701 MODULE_FIRMWARE("mwl8k/helper_8366.fw");
5702 MODULE_FIRMWARE("mwl8k/fmimage_8366.fw");
5703 MODULE_FIRMWARE(MWL8K_8366_AP_FW(MWL8K_8366_AP_FW_API));
5704 
5705 static const struct pci_device_id mwl8k_pci_id_table[] = {
5706 	{ PCI_VDEVICE(MARVELL, 0x2a0a), .driver_data = MWL8363, },
5707 	{ PCI_VDEVICE(MARVELL, 0x2a0c), .driver_data = MWL8363, },
5708 	{ PCI_VDEVICE(MARVELL, 0x2a24), .driver_data = MWL8363, },
5709 	{ PCI_VDEVICE(MARVELL, 0x2a2b), .driver_data = MWL8687, },
5710 	{ PCI_VDEVICE(MARVELL, 0x2a30), .driver_data = MWL8687, },
5711 	{ PCI_VDEVICE(MARVELL, 0x2a40), .driver_data = MWL8366, },
5712 	{ PCI_VDEVICE(MARVELL, 0x2a41), .driver_data = MWL8366, },
5713 	{ PCI_VDEVICE(MARVELL, 0x2a42), .driver_data = MWL8366, },
5714 	{ PCI_VDEVICE(MARVELL, 0x2a43), .driver_data = MWL8366, },
5715 	{ PCI_VDEVICE(MARVELL, 0x2b36), .driver_data = MWL8764, },
5716 	{ },
5717 };
5718 MODULE_DEVICE_TABLE(pci, mwl8k_pci_id_table);
5719 
5720 static int mwl8k_request_alt_fw(struct mwl8k_priv *priv)
5721 {
5722 	int rc;
5723 	printk(KERN_ERR "%s: Error requesting preferred fw %s.\n"
5724 	       "Trying alternative firmware %s\n", pci_name(priv->pdev),
5725 	       priv->fw_pref, priv->fw_alt);
5726 	rc = mwl8k_request_fw(priv, priv->fw_alt, &priv->fw_ucode, true);
5727 	if (rc) {
5728 		printk(KERN_ERR "%s: Error requesting alt fw %s\n",
5729 		       pci_name(priv->pdev), priv->fw_alt);
5730 		return rc;
5731 	}
5732 	return 0;
5733 }
5734 
5735 static int mwl8k_firmware_load_success(struct mwl8k_priv *priv);
5736 static void mwl8k_fw_state_machine(const struct firmware *fw, void *context)
5737 {
5738 	struct mwl8k_priv *priv = context;
5739 	struct mwl8k_device_info *di = priv->device_info;
5740 	int rc;
5741 
5742 	switch (priv->fw_state) {
5743 	case FW_STATE_INIT:
5744 		if (!fw) {
5745 			printk(KERN_ERR "%s: Error requesting helper fw %s\n",
5746 			       pci_name(priv->pdev), di->helper_image);
5747 			goto fail;
5748 		}
5749 		priv->fw_helper = fw;
5750 		rc = mwl8k_request_fw(priv, priv->fw_pref, &priv->fw_ucode,
5751 				      true);
5752 		if (rc && priv->fw_alt) {
5753 			rc = mwl8k_request_alt_fw(priv);
5754 			if (rc)
5755 				goto fail;
5756 			priv->fw_state = FW_STATE_LOADING_ALT;
5757 		} else if (rc)
5758 			goto fail;
5759 		else
5760 			priv->fw_state = FW_STATE_LOADING_PREF;
5761 		break;
5762 
5763 	case FW_STATE_LOADING_PREF:
5764 		if (!fw) {
5765 			if (priv->fw_alt) {
5766 				rc = mwl8k_request_alt_fw(priv);
5767 				if (rc)
5768 					goto fail;
5769 				priv->fw_state = FW_STATE_LOADING_ALT;
5770 			} else
5771 				goto fail;
5772 		} else {
5773 			priv->fw_ucode = fw;
5774 			rc = mwl8k_firmware_load_success(priv);
5775 			if (rc)
5776 				goto fail;
5777 			else
5778 				complete(&priv->firmware_loading_complete);
5779 		}
5780 		break;
5781 
5782 	case FW_STATE_LOADING_ALT:
5783 		if (!fw) {
5784 			printk(KERN_ERR "%s: Error requesting alt fw %s\n",
5785 			       pci_name(priv->pdev), di->helper_image);
5786 			goto fail;
5787 		}
5788 		priv->fw_ucode = fw;
5789 		rc = mwl8k_firmware_load_success(priv);
5790 		if (rc)
5791 			goto fail;
5792 		else
5793 			complete(&priv->firmware_loading_complete);
5794 		break;
5795 
5796 	default:
5797 		printk(KERN_ERR "%s: Unexpected firmware loading state: %d\n",
5798 		       MWL8K_NAME, priv->fw_state);
5799 		BUG_ON(1);
5800 	}
5801 
5802 	return;
5803 
5804 fail:
5805 	priv->fw_state = FW_STATE_ERROR;
5806 	complete(&priv->firmware_loading_complete);
5807 	mwl8k_release_firmware(priv);
5808 	device_release_driver(&priv->pdev->dev);
5809 }
5810 
5811 #define MAX_RESTART_ATTEMPTS 1
5812 static int mwl8k_init_firmware(struct ieee80211_hw *hw, char *fw_image,
5813 			       bool nowait)
5814 {
5815 	struct mwl8k_priv *priv = hw->priv;
5816 	int rc;
5817 	int count = MAX_RESTART_ATTEMPTS;
5818 
5819 retry:
5820 	/* Reset firmware and hardware */
5821 	mwl8k_hw_reset(priv);
5822 
5823 	/* Ask userland hotplug daemon for the device firmware */
5824 	rc = mwl8k_request_firmware(priv, fw_image, nowait);
5825 	if (rc) {
5826 		wiphy_err(hw->wiphy, "Firmware files not found\n");
5827 		return rc;
5828 	}
5829 
5830 	if (nowait)
5831 		return rc;
5832 
5833 	/* Load firmware into hardware */
5834 	rc = mwl8k_load_firmware(hw);
5835 	if (rc)
5836 		wiphy_err(hw->wiphy, "Cannot start firmware\n");
5837 
5838 	/* Reclaim memory once firmware is successfully loaded */
5839 	mwl8k_release_firmware(priv);
5840 
5841 	if (rc && count) {
5842 		/* FW did not start successfully;
5843 		 * lets try one more time
5844 		 */
5845 		count--;
5846 		wiphy_err(hw->wiphy, "Trying to reload the firmware again\n");
5847 		msleep(20);
5848 		goto retry;
5849 	}
5850 
5851 	return rc;
5852 }
5853 
5854 static int mwl8k_init_txqs(struct ieee80211_hw *hw)
5855 {
5856 	struct mwl8k_priv *priv = hw->priv;
5857 	int rc = 0;
5858 	int i;
5859 
5860 	for (i = 0; i < mwl8k_tx_queues(priv); i++) {
5861 		rc = mwl8k_txq_init(hw, i);
5862 		if (rc)
5863 			break;
5864 		if (priv->ap_fw)
5865 			iowrite32(priv->txq[i].txd_dma,
5866 				  priv->sram + priv->txq_offset[i]);
5867 	}
5868 	return rc;
5869 }
5870 
5871 /* initialize hw after successfully loading a firmware image */
5872 static int mwl8k_probe_hw(struct ieee80211_hw *hw)
5873 {
5874 	struct mwl8k_priv *priv = hw->priv;
5875 	int rc = 0;
5876 	int i;
5877 
5878 	if (priv->ap_fw) {
5879 		priv->rxd_ops = priv->device_info->ap_rxd_ops;
5880 		if (priv->rxd_ops == NULL) {
5881 			wiphy_err(hw->wiphy,
5882 				  "Driver does not have AP firmware image support for this hardware\n");
5883 			rc = -ENOENT;
5884 			goto err_stop_firmware;
5885 		}
5886 	} else {
5887 		priv->rxd_ops = &rxd_sta_ops;
5888 	}
5889 
5890 	priv->sniffer_enabled = false;
5891 	priv->wmm_enabled = false;
5892 	priv->pending_tx_pkts = 0;
5893 	atomic_set(&priv->watchdog_event_pending, 0);
5894 
5895 	rc = mwl8k_rxq_init(hw, 0);
5896 	if (rc)
5897 		goto err_stop_firmware;
5898 	rxq_refill(hw, 0, INT_MAX);
5899 
5900 	/* For the sta firmware, we need to know the dma addresses of tx queues
5901 	 * before sending MWL8K_CMD_GET_HW_SPEC.  So we must initialize them
5902 	 * prior to issuing this command.  But for the AP case, we learn the
5903 	 * total number of queues from the result CMD_GET_HW_SPEC, so for this
5904 	 * case we must initialize the tx queues after.
5905 	 */
5906 	priv->num_ampdu_queues = 0;
5907 	if (!priv->ap_fw) {
5908 		rc = mwl8k_init_txqs(hw);
5909 		if (rc)
5910 			goto err_free_queues;
5911 	}
5912 
5913 	iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
5914 	iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5915 	iowrite32(MWL8K_A2H_INT_TX_DONE|MWL8K_A2H_INT_RX_READY|
5916 		  MWL8K_A2H_INT_BA_WATCHDOG,
5917 		  priv->regs + MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL);
5918 	iowrite32(MWL8K_A2H_INT_OPC_DONE,
5919 		  priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
5920 
5921 	rc = request_irq(priv->pdev->irq, mwl8k_interrupt,
5922 			 IRQF_SHARED, MWL8K_NAME, hw);
5923 	if (rc) {
5924 		wiphy_err(hw->wiphy, "failed to register IRQ handler\n");
5925 		goto err_free_queues;
5926 	}
5927 
5928 	/*
5929 	 * When hw restart is requested,
5930 	 * mac80211 will take care of clearing
5931 	 * the ampdu streams, so do not clear
5932 	 * the ampdu state here
5933 	 */
5934 	if (!priv->hw_restart_in_progress)
5935 		memset(priv->ampdu, 0, sizeof(priv->ampdu));
5936 
5937 	/*
5938 	 * Temporarily enable interrupts.  Initial firmware host
5939 	 * commands use interrupts and avoid polling.  Disable
5940 	 * interrupts when done.
5941 	 */
5942 	iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5943 
5944 	/* Get config data, mac addrs etc */
5945 	if (priv->ap_fw) {
5946 		rc = mwl8k_cmd_get_hw_spec_ap(hw);
5947 		if (!rc)
5948 			rc = mwl8k_init_txqs(hw);
5949 		if (!rc)
5950 			rc = mwl8k_cmd_set_hw_spec(hw);
5951 	} else {
5952 		rc = mwl8k_cmd_get_hw_spec_sta(hw);
5953 	}
5954 	if (rc) {
5955 		wiphy_err(hw->wiphy, "Cannot initialise firmware\n");
5956 		goto err_free_irq;
5957 	}
5958 
5959 	/* Turn radio off */
5960 	rc = mwl8k_cmd_radio_disable(hw);
5961 	if (rc) {
5962 		wiphy_err(hw->wiphy, "Cannot disable\n");
5963 		goto err_free_irq;
5964 	}
5965 
5966 	/* Clear MAC address */
5967 	rc = mwl8k_cmd_set_mac_addr(hw, NULL, "\x00\x00\x00\x00\x00\x00");
5968 	if (rc) {
5969 		wiphy_err(hw->wiphy, "Cannot clear MAC address\n");
5970 		goto err_free_irq;
5971 	}
5972 
5973 	/* Configure Antennas */
5974 	rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_RX, 0x3);
5975 	if (rc)
5976 		wiphy_warn(hw->wiphy, "failed to set # of RX antennas");
5977 	rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_TX, 0x7);
5978 	if (rc)
5979 		wiphy_warn(hw->wiphy, "failed to set # of TX antennas");
5980 
5981 
5982 	/* Disable interrupts */
5983 	iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5984 	free_irq(priv->pdev->irq, hw);
5985 
5986 	wiphy_info(hw->wiphy, "%s v%d, %pm, %s firmware %u.%u.%u.%u\n",
5987 		   priv->device_info->part_name,
5988 		   priv->hw_rev, hw->wiphy->perm_addr,
5989 		   priv->ap_fw ? "AP" : "STA",
5990 		   (priv->fw_rev >> 24) & 0xff, (priv->fw_rev >> 16) & 0xff,
5991 		   (priv->fw_rev >> 8) & 0xff, priv->fw_rev & 0xff);
5992 
5993 	return 0;
5994 
5995 err_free_irq:
5996 	iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5997 	free_irq(priv->pdev->irq, hw);
5998 
5999 err_free_queues:
6000 	for (i = 0; i < mwl8k_tx_queues(priv); i++)
6001 		mwl8k_txq_deinit(hw, i);
6002 	mwl8k_rxq_deinit(hw, 0);
6003 
6004 err_stop_firmware:
6005 	mwl8k_hw_reset(priv);
6006 
6007 	return rc;
6008 }
6009 
6010 /*
6011  * invoke mwl8k_reload_firmware to change the firmware image after the device
6012  * has already been registered
6013  */
6014 static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image)
6015 {
6016 	int i, rc = 0;
6017 	struct mwl8k_priv *priv = hw->priv;
6018 	struct mwl8k_vif *vif, *tmp_vif;
6019 
6020 	mwl8k_stop(hw);
6021 	mwl8k_rxq_deinit(hw, 0);
6022 
6023 	/*
6024 	 * All the existing interfaces are re-added by the ieee80211_reconfig;
6025 	 * which means driver should remove existing interfaces before calling
6026 	 * ieee80211_restart_hw
6027 	 */
6028 	if (priv->hw_restart_in_progress)
6029 		list_for_each_entry_safe(vif, tmp_vif, &priv->vif_list, list)
6030 			mwl8k_remove_vif(priv, vif);
6031 
6032 	for (i = 0; i < mwl8k_tx_queues(priv); i++)
6033 		mwl8k_txq_deinit(hw, i);
6034 
6035 	rc = mwl8k_init_firmware(hw, fw_image, false);
6036 	if (rc)
6037 		goto fail;
6038 
6039 	rc = mwl8k_probe_hw(hw);
6040 	if (rc)
6041 		goto fail;
6042 
6043 	if (priv->hw_restart_in_progress)
6044 		return rc;
6045 
6046 	rc = mwl8k_start(hw);
6047 	if (rc)
6048 		goto fail;
6049 
6050 	rc = mwl8k_config(hw, ~0);
6051 	if (rc)
6052 		goto fail;
6053 
6054 	for (i = 0; i < MWL8K_TX_WMM_QUEUES; i++) {
6055 		rc = mwl8k_conf_tx(hw, NULL, 0, i, &priv->wmm_params[i]);
6056 		if (rc)
6057 			goto fail;
6058 	}
6059 
6060 	return rc;
6061 
6062 fail:
6063 	printk(KERN_WARNING "mwl8k: Failed to reload firmware image.\n");
6064 	return rc;
6065 }
6066 
6067 static const struct ieee80211_iface_limit ap_if_limits[] = {
6068 	{ .max = 8,	.types = BIT(NL80211_IFTYPE_AP) },
6069 	{ .max = 1,	.types = BIT(NL80211_IFTYPE_STATION) },
6070 };
6071 
6072 static const struct ieee80211_iface_combination ap_if_comb = {
6073 	.limits = ap_if_limits,
6074 	.n_limits = ARRAY_SIZE(ap_if_limits),
6075 	.max_interfaces = 8,
6076 	.num_different_channels = 1,
6077 };
6078 
6079 
6080 static int mwl8k_firmware_load_success(struct mwl8k_priv *priv)
6081 {
6082 	struct ieee80211_hw *hw = priv->hw;
6083 	int i, rc;
6084 
6085 	rc = mwl8k_load_firmware(hw);
6086 	mwl8k_release_firmware(priv);
6087 	if (rc) {
6088 		wiphy_err(hw->wiphy, "Cannot start firmware\n");
6089 		return rc;
6090 	}
6091 
6092 	/*
6093 	 * Extra headroom is the size of the required DMA header
6094 	 * minus the size of the smallest 802.11 frame (CTS frame).
6095 	 */
6096 	hw->extra_tx_headroom =
6097 		sizeof(struct mwl8k_dma_data) - sizeof(struct ieee80211_cts);
6098 
6099 	hw->extra_tx_headroom -= priv->ap_fw ? REDUCED_TX_HEADROOM : 0;
6100 
6101 	hw->queues = MWL8K_TX_WMM_QUEUES;
6102 
6103 	/* Set rssi values to dBm */
6104 	ieee80211_hw_set(hw, SIGNAL_DBM);
6105 	ieee80211_hw_set(hw, HAS_RATE_CONTROL);
6106 
6107 	/*
6108 	 * Ask mac80211 to not to trigger PS mode
6109 	 * based on PM bit of incoming frames.
6110 	 */
6111 	if (priv->ap_fw)
6112 		ieee80211_hw_set(hw, AP_LINK_PS);
6113 
6114 	hw->vif_data_size = sizeof(struct mwl8k_vif);
6115 	hw->sta_data_size = sizeof(struct mwl8k_sta);
6116 
6117 	priv->macids_used = 0;
6118 	INIT_LIST_HEAD(&priv->vif_list);
6119 
6120 	/* Set default radio state and preamble */
6121 	priv->radio_on = false;
6122 	priv->radio_short_preamble = false;
6123 
6124 	/* Finalize join worker */
6125 	INIT_WORK(&priv->finalize_join_worker, mwl8k_finalize_join_worker);
6126 	/* Handle watchdog ba events */
6127 	INIT_WORK(&priv->watchdog_ba_handle, mwl8k_watchdog_ba_events);
6128 	/* To reload the firmware if it crashes */
6129 	INIT_WORK(&priv->fw_reload, mwl8k_hw_restart_work);
6130 
6131 	/* TX reclaim and RX tasklets.  */
6132 	tasklet_setup(&priv->poll_tx_task, mwl8k_tx_poll);
6133 	tasklet_disable(&priv->poll_tx_task);
6134 	tasklet_setup(&priv->poll_rx_task, mwl8k_rx_poll);
6135 	tasklet_disable(&priv->poll_rx_task);
6136 
6137 	/* Power management cookie */
6138 	priv->cookie = dma_alloc_coherent(&priv->pdev->dev, 4,
6139 					  &priv->cookie_dma, GFP_KERNEL);
6140 	if (priv->cookie == NULL)
6141 		return -ENOMEM;
6142 
6143 	mutex_init(&priv->fw_mutex);
6144 	priv->fw_mutex_owner = NULL;
6145 	priv->fw_mutex_depth = 0;
6146 	priv->hostcmd_wait = NULL;
6147 
6148 	spin_lock_init(&priv->tx_lock);
6149 
6150 	spin_lock_init(&priv->stream_lock);
6151 
6152 	priv->tx_wait = NULL;
6153 
6154 	rc = mwl8k_probe_hw(hw);
6155 	if (rc)
6156 		goto err_free_cookie;
6157 
6158 	hw->wiphy->interface_modes = 0;
6159 
6160 	if (priv->ap_macids_supported || priv->device_info->fw_image_ap) {
6161 		hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP);
6162 		hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION);
6163 		hw->wiphy->iface_combinations = &ap_if_comb;
6164 		hw->wiphy->n_iface_combinations = 1;
6165 	}
6166 
6167 	if (priv->sta_macids_supported || priv->device_info->fw_image_sta)
6168 		hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION);
6169 
6170 	wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
6171 
6172 	rc = ieee80211_register_hw(hw);
6173 	if (rc) {
6174 		wiphy_err(hw->wiphy, "Cannot register device\n");
6175 		goto err_unprobe_hw;
6176 	}
6177 
6178 	return 0;
6179 
6180 err_unprobe_hw:
6181 	for (i = 0; i < mwl8k_tx_queues(priv); i++)
6182 		mwl8k_txq_deinit(hw, i);
6183 	mwl8k_rxq_deinit(hw, 0);
6184 
6185 err_free_cookie:
6186 	if (priv->cookie != NULL)
6187 		dma_free_coherent(&priv->pdev->dev, 4, priv->cookie,
6188 				  priv->cookie_dma);
6189 
6190 	return rc;
6191 }
6192 static int mwl8k_probe(struct pci_dev *pdev,
6193 				 const struct pci_device_id *id)
6194 {
6195 	static int printed_version;
6196 	struct ieee80211_hw *hw;
6197 	struct mwl8k_priv *priv;
6198 	struct mwl8k_device_info *di;
6199 	int rc;
6200 
6201 	if (!printed_version) {
6202 		printk(KERN_INFO "%s version %s\n", MWL8K_DESC, MWL8K_VERSION);
6203 		printed_version = 1;
6204 	}
6205 
6206 
6207 	rc = pci_enable_device(pdev);
6208 	if (rc) {
6209 		printk(KERN_ERR "%s: Cannot enable new PCI device\n",
6210 		       MWL8K_NAME);
6211 		return rc;
6212 	}
6213 
6214 	rc = pci_request_regions(pdev, MWL8K_NAME);
6215 	if (rc) {
6216 		printk(KERN_ERR "%s: Cannot obtain PCI resources\n",
6217 		       MWL8K_NAME);
6218 		goto err_disable_device;
6219 	}
6220 
6221 	pci_set_master(pdev);
6222 
6223 
6224 	hw = ieee80211_alloc_hw(sizeof(*priv), &mwl8k_ops);
6225 	if (hw == NULL) {
6226 		printk(KERN_ERR "%s: ieee80211 alloc failed\n", MWL8K_NAME);
6227 		rc = -ENOMEM;
6228 		goto err_free_reg;
6229 	}
6230 
6231 	SET_IEEE80211_DEV(hw, &pdev->dev);
6232 	pci_set_drvdata(pdev, hw);
6233 
6234 	priv = hw->priv;
6235 	priv->hw = hw;
6236 	priv->pdev = pdev;
6237 	priv->device_info = &mwl8k_info_tbl[id->driver_data];
6238 
6239 	if (id->driver_data == MWL8764)
6240 		priv->is_8764 = true;
6241 
6242 	priv->sram = pci_iomap(pdev, 0, 0x10000);
6243 	if (priv->sram == NULL) {
6244 		wiphy_err(hw->wiphy, "Cannot map device SRAM\n");
6245 		rc = -EIO;
6246 		goto err_iounmap;
6247 	}
6248 
6249 	/*
6250 	 * If BAR0 is a 32 bit BAR, the register BAR will be BAR1.
6251 	 * If BAR0 is a 64 bit BAR, the register BAR will be BAR2.
6252 	 */
6253 	priv->regs = pci_iomap(pdev, 1, 0x10000);
6254 	if (priv->regs == NULL) {
6255 		priv->regs = pci_iomap(pdev, 2, 0x10000);
6256 		if (priv->regs == NULL) {
6257 			wiphy_err(hw->wiphy, "Cannot map device registers\n");
6258 			rc = -EIO;
6259 			goto err_iounmap;
6260 		}
6261 	}
6262 
6263 	/*
6264 	 * Choose the initial fw image depending on user input.  If a second
6265 	 * image is available, make it the alternative image that will be
6266 	 * loaded if the first one fails.
6267 	 */
6268 	init_completion(&priv->firmware_loading_complete);
6269 	di = priv->device_info;
6270 	if (ap_mode_default && di->fw_image_ap) {
6271 		priv->fw_pref = di->fw_image_ap;
6272 		priv->fw_alt = di->fw_image_sta;
6273 	} else if (!ap_mode_default && di->fw_image_sta) {
6274 		priv->fw_pref = di->fw_image_sta;
6275 		priv->fw_alt = di->fw_image_ap;
6276 	} else if (ap_mode_default && !di->fw_image_ap && di->fw_image_sta) {
6277 		printk(KERN_WARNING "AP fw is unavailable.  Using STA fw.");
6278 		priv->fw_pref = di->fw_image_sta;
6279 	} else if (!ap_mode_default && !di->fw_image_sta && di->fw_image_ap) {
6280 		printk(KERN_WARNING "STA fw is unavailable.  Using AP fw.");
6281 		priv->fw_pref = di->fw_image_ap;
6282 	}
6283 	rc = mwl8k_init_firmware(hw, priv->fw_pref, true);
6284 	if (rc)
6285 		goto err_stop_firmware;
6286 
6287 	priv->hw_restart_in_progress = false;
6288 
6289 	priv->running_bsses = 0;
6290 
6291 	return rc;
6292 
6293 err_stop_firmware:
6294 	mwl8k_hw_reset(priv);
6295 
6296 err_iounmap:
6297 	if (priv->regs != NULL)
6298 		pci_iounmap(pdev, priv->regs);
6299 
6300 	if (priv->sram != NULL)
6301 		pci_iounmap(pdev, priv->sram);
6302 
6303 	ieee80211_free_hw(hw);
6304 
6305 err_free_reg:
6306 	pci_release_regions(pdev);
6307 
6308 err_disable_device:
6309 	pci_disable_device(pdev);
6310 
6311 	return rc;
6312 }
6313 
6314 static void mwl8k_remove(struct pci_dev *pdev)
6315 {
6316 	struct ieee80211_hw *hw = pci_get_drvdata(pdev);
6317 	struct mwl8k_priv *priv;
6318 	int i;
6319 
6320 	if (hw == NULL)
6321 		return;
6322 	priv = hw->priv;
6323 
6324 	wait_for_completion(&priv->firmware_loading_complete);
6325 
6326 	if (priv->fw_state == FW_STATE_ERROR) {
6327 		mwl8k_hw_reset(priv);
6328 		goto unmap;
6329 	}
6330 
6331 	ieee80211_stop_queues(hw);
6332 
6333 	ieee80211_unregister_hw(hw);
6334 
6335 	/* Remove TX reclaim and RX tasklets.  */
6336 	tasklet_kill(&priv->poll_tx_task);
6337 	tasklet_kill(&priv->poll_rx_task);
6338 
6339 	/* Stop hardware */
6340 	mwl8k_hw_reset(priv);
6341 
6342 	/* Return all skbs to mac80211 */
6343 	for (i = 0; i < mwl8k_tx_queues(priv); i++)
6344 		mwl8k_txq_reclaim(hw, i, INT_MAX, 1);
6345 
6346 	for (i = 0; i < mwl8k_tx_queues(priv); i++)
6347 		mwl8k_txq_deinit(hw, i);
6348 
6349 	mwl8k_rxq_deinit(hw, 0);
6350 
6351 	dma_free_coherent(&priv->pdev->dev, 4, priv->cookie, priv->cookie_dma);
6352 
6353 unmap:
6354 	pci_iounmap(pdev, priv->regs);
6355 	pci_iounmap(pdev, priv->sram);
6356 	ieee80211_free_hw(hw);
6357 	pci_release_regions(pdev);
6358 	pci_disable_device(pdev);
6359 }
6360 
6361 static struct pci_driver mwl8k_driver = {
6362 	.name		= MWL8K_NAME,
6363 	.id_table	= mwl8k_pci_id_table,
6364 	.probe		= mwl8k_probe,
6365 	.remove		= mwl8k_remove,
6366 };
6367 
6368 module_pci_driver(mwl8k_driver);
6369 
6370 MODULE_DESCRIPTION(MWL8K_DESC);
6371 MODULE_VERSION(MWL8K_VERSION);
6372 MODULE_AUTHOR("Lennert Buytenhek <buytenh@marvell.com>");
6373 MODULE_LICENSE("GPL");
6374