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gpio: rcar: Fix runtime PM imbalance on error
[linux/fpc-iii.git] / drivers / net / wireless / marvell / mwl8k.c
blob47fb4b3ea004515c4c325b9b518291d07605f674
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 = pci_map_single(priv->pdev, data, length, PCI_DMA_TODEVICE);
609 if (pci_dma_mapping_error(priv->pdev, dma_addr))
610 return -ENOMEM;
611
612 iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
613 iowrite32(0, regs + MWL8K_HIU_INT_CODE);
614 iowrite32(MWL8K_H2A_INT_DOORBELL,
615 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
616 iowrite32(MWL8K_H2A_INT_DUMMY,
617 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
618
619 loops = 1000;
620 do {
621 u32 int_code;
622 if (priv->is_8764) {
623 int_code = ioread32(regs +
624 MWL8K_HIU_H2A_INTERRUPT_STATUS);
625 if (int_code == 0)
626 break;
627 } else {
628 int_code = ioread32(regs + MWL8K_HIU_INT_CODE);
629 if (int_code == MWL8K_INT_CODE_CMD_FINISHED) {
630 iowrite32(0, regs + MWL8K_HIU_INT_CODE);
631 break;
632 }
633 }
634 cond_resched();
635 udelay(1);
636 } while (--loops);
637
638 pci_unmap_single(priv->pdev, dma_addr, length, PCI_DMA_TODEVICE);
639
640 return loops ? 0 : -ETIMEDOUT;
641 }
642
643 static int mwl8k_load_fw_image(struct mwl8k_priv *priv,
644 const u8 *data, size_t length)
645 {
646 struct mwl8k_cmd_pkt *cmd;
647 int done;
648 int rc = 0;
649
650 cmd = kmalloc(sizeof(*cmd) + 256, GFP_KERNEL);
651 if (cmd == NULL)
652 return -ENOMEM;
653
654 cmd->code = cpu_to_le16(MWL8K_CMD_CODE_DNLD);
655 cmd->seq_num = 0;
656 cmd->macid = 0;
657 cmd->result = 0;
658
659 done = 0;
660 while (length) {
661 int block_size = length > 256 ? 256 : length;
662
663 memcpy(cmd->payload, data + done, block_size);
664 cmd->length = cpu_to_le16(block_size);
665
666 rc = mwl8k_send_fw_load_cmd(priv, cmd,
667 sizeof(*cmd) + block_size);
668 if (rc)
669 break;
670
671 done += block_size;
672 length -= block_size;
673 }
674
675 if (!rc) {
676 cmd->length = 0;
677 rc = mwl8k_send_fw_load_cmd(priv, cmd, sizeof(*cmd));
678 }
679
680 kfree(cmd);
681
682 return rc;
683 }
684
685 static int mwl8k_feed_fw_image(struct mwl8k_priv *priv,
686 const u8 *data, size_t length)
687 {
688 unsigned char *buffer;
689 int may_continue, rc = 0;
690 u32 done, prev_block_size;
691
692 buffer = kmalloc(1024, GFP_KERNEL);
693 if (buffer == NULL)
694 return -ENOMEM;
695
696 done = 0;
697 prev_block_size = 0;
698 may_continue = 1000;
699 while (may_continue > 0) {
700 u32 block_size;
701
702 block_size = ioread32(priv->regs + MWL8K_HIU_SCRATCH);
703 if (block_size & 1) {
704 block_size &= ~1;
705 may_continue--;
706 } else {
707 done += prev_block_size;
708 length -= prev_block_size;
709 }
710
711 if (block_size > 1024 || block_size > length) {
712 rc = -EOVERFLOW;
713 break;
714 }
715
716 if (length == 0) {
717 rc = 0;
718 break;
719 }
720
721 if (block_size == 0) {
722 rc = -EPROTO;
723 may_continue--;
724 udelay(1);
725 continue;
726 }
727
728 prev_block_size = block_size;
729 memcpy(buffer, data + done, block_size);
730
731 rc = mwl8k_send_fw_load_cmd(priv, buffer, block_size);
732 if (rc)
733 break;
734 }
735
736 if (!rc && length != 0)
737 rc = -EREMOTEIO;
738
739 kfree(buffer);
740
741 return rc;
742 }
743
744 static int mwl8k_load_firmware(struct ieee80211_hw *hw)
745 {
746 struct mwl8k_priv *priv = hw->priv;
747 const struct firmware *fw = priv->fw_ucode;
748 int rc;
749 int loops;
750
751 if (!memcmp(fw->data, "\x01\x00\x00\x00", 4) && !priv->is_8764) {
752 const struct firmware *helper = priv->fw_helper;
753
754 if (helper == NULL) {
755 printk(KERN_ERR "%s: helper image needed but none "
756 "given\n", pci_name(priv->pdev));
757 return -EINVAL;
758 }
759
760 rc = mwl8k_load_fw_image(priv, helper->data, helper->size);
761 if (rc) {
762 printk(KERN_ERR "%s: unable to load firmware "
763 "helper image\n", pci_name(priv->pdev));
764 return rc;
765 }
766 msleep(20);
767
768 rc = mwl8k_feed_fw_image(priv, fw->data, fw->size);
769 } else {
770 if (priv->is_8764)
771 rc = mwl8k_feed_fw_image(priv, fw->data, fw->size);
772 else
773 rc = mwl8k_load_fw_image(priv, fw->data, fw->size);
774 }
775
776 if (rc) {
777 printk(KERN_ERR "%s: unable to load firmware image\n",
778 pci_name(priv->pdev));
779 return rc;
780 }
781
782 iowrite32(MWL8K_MODE_STA, priv->regs + MWL8K_HIU_GEN_PTR);
783
784 loops = 500000;
785 do {
786 u32 ready_code;
787
788 ready_code = ioread32(priv->regs + MWL8K_HIU_INT_CODE);
789 if (ready_code == MWL8K_FWAP_READY) {
790 priv->ap_fw = true;
791 break;
792 } else if (ready_code == MWL8K_FWSTA_READY) {
793 priv->ap_fw = false;
794 break;
795 }
796
797 cond_resched();
798 udelay(1);
799 } while (--loops);
800
801 return loops ? 0 : -ETIMEDOUT;
802 }
803
804
805 /* DMA header used by firmware and hardware. */
806 struct mwl8k_dma_data {
807 __le16 fwlen;
808 struct ieee80211_hdr wh;
809 char data[];
810 } __packed;
811
812 /* Routines to add/remove DMA header from skb. */
813 static inline void mwl8k_remove_dma_header(struct sk_buff *skb, __le16 qos)
814 {
815 struct mwl8k_dma_data *tr;
816 int hdrlen;
817
818 tr = (struct mwl8k_dma_data *)skb->data;
819 hdrlen = ieee80211_hdrlen(tr->wh.frame_control);
820
821 if (hdrlen != sizeof(tr->wh)) {
822 if (ieee80211_is_data_qos(tr->wh.frame_control)) {
823 memmove(tr->data - hdrlen, &tr->wh, hdrlen - 2);
824 *((__le16 *)(tr->data - 2)) = qos;
825 } else {
826 memmove(tr->data - hdrlen, &tr->wh, hdrlen);
827 }
828 }
829
830 if (hdrlen != sizeof(*tr))
831 skb_pull(skb, sizeof(*tr) - hdrlen);
832 }
833
834 #define REDUCED_TX_HEADROOM 8
835
836 static void
837 mwl8k_add_dma_header(struct mwl8k_priv *priv, struct sk_buff *skb,
838 int head_pad, int tail_pad)
839 {
840 struct ieee80211_hdr *wh;
841 int hdrlen;
842 int reqd_hdrlen;
843 struct mwl8k_dma_data *tr;
844
845 /*
846 * Add a firmware DMA header; the firmware requires that we
847 * present a 2-byte payload length followed by a 4-address
848 * header (without QoS field), followed (optionally) by any
849 * WEP/ExtIV header (but only filled in for CCMP).
850 */
851 wh = (struct ieee80211_hdr *)skb->data;
852
853 hdrlen = ieee80211_hdrlen(wh->frame_control);
854
855 /*
856 * Check if skb_resize is required because of
857 * tx_headroom adjustment.
858 */
859 if (priv->ap_fw && (hdrlen < (sizeof(struct ieee80211_cts)
860 + REDUCED_TX_HEADROOM))) {
861 if (pskb_expand_head(skb, REDUCED_TX_HEADROOM, 0, GFP_ATOMIC)) {
862
863 wiphy_err(priv->hw->wiphy,
864 "Failed to reallocate TX buffer\n");
865 return;
866 }
867 skb->truesize += REDUCED_TX_HEADROOM;
868 }
869
870 reqd_hdrlen = sizeof(*tr) + head_pad;
871
872 if (hdrlen != reqd_hdrlen)
873 skb_push(skb, reqd_hdrlen - hdrlen);
874
875 if (ieee80211_is_data_qos(wh->frame_control))
876 hdrlen -= IEEE80211_QOS_CTL_LEN;
877
878 tr = (struct mwl8k_dma_data *)skb->data;
879 if (wh != &tr->wh)
880 memmove(&tr->wh, wh, hdrlen);
881 if (hdrlen != sizeof(tr->wh))
882 memset(((void *)&tr->wh) + hdrlen, 0, sizeof(tr->wh) - hdrlen);
883
884 /*
885 * Firmware length is the length of the fully formed "802.11
886 * payload". That is, everything except for the 802.11 header.
887 * This includes all crypto material including the MIC.
888 */
889 tr->fwlen = cpu_to_le16(skb->len - sizeof(*tr) + tail_pad);
890 }
891
892 static void mwl8k_encapsulate_tx_frame(struct mwl8k_priv *priv,
893 struct sk_buff *skb)
894 {
895 struct ieee80211_hdr *wh;
896 struct ieee80211_tx_info *tx_info;
897 struct ieee80211_key_conf *key_conf;
898 int data_pad;
899 int head_pad = 0;
900
901 wh = (struct ieee80211_hdr *)skb->data;
902
903 tx_info = IEEE80211_SKB_CB(skb);
904
905 key_conf = NULL;
906 if (ieee80211_is_data(wh->frame_control))
907 key_conf = tx_info->control.hw_key;
908
909 /*
910 * Make sure the packet header is in the DMA header format (4-address
911 * without QoS), and add head & tail padding when HW crypto is enabled.
912 *
913 * We have the following trailer padding requirements:
914 * - WEP: 4 trailer bytes (ICV)
915 * - TKIP: 12 trailer bytes (8 MIC + 4 ICV)
916 * - CCMP: 8 trailer bytes (MIC)
917 */
918 data_pad = 0;
919 if (key_conf != NULL) {
920 head_pad = key_conf->iv_len;
921 switch (key_conf->cipher) {
922 case WLAN_CIPHER_SUITE_WEP40:
923 case WLAN_CIPHER_SUITE_WEP104:
924 data_pad = 4;
925 break;
926 case WLAN_CIPHER_SUITE_TKIP:
927 data_pad = 12;
928 break;
929 case WLAN_CIPHER_SUITE_CCMP:
930 data_pad = 8;
931 break;
932 }
933 }
934 mwl8k_add_dma_header(priv, skb, head_pad, data_pad);
935 }
936
937 /*
938 * Packet reception for 88w8366/88w8764 AP firmware.
939 */
940 struct mwl8k_rxd_ap {
941 __le16 pkt_len;
942 __u8 sq2;
943 __u8 rate;
944 __le32 pkt_phys_addr;
945 __le32 next_rxd_phys_addr;
946 __le16 qos_control;
947 __le16 htsig2;
948 __le32 hw_rssi_info;
949 __le32 hw_noise_floor_info;
950 __u8 noise_floor;
951 __u8 pad0[3];
952 __u8 rssi;
953 __u8 rx_status;
954 __u8 channel;
955 __u8 rx_ctrl;
956 } __packed;
957
958 #define MWL8K_AP_RATE_INFO_MCS_FORMAT 0x80
959 #define MWL8K_AP_RATE_INFO_40MHZ 0x40
960 #define MWL8K_AP_RATE_INFO_RATEID(x) ((x) & 0x3f)
961
962 #define MWL8K_AP_RX_CTRL_OWNED_BY_HOST 0x80
963
964 /* 8366/8764 AP rx_status bits */
965 #define MWL8K_AP_RXSTAT_DECRYPT_ERR_MASK 0x80
966 #define MWL8K_AP_RXSTAT_GENERAL_DECRYPT_ERR 0xFF
967 #define MWL8K_AP_RXSTAT_TKIP_DECRYPT_MIC_ERR 0x02
968 #define MWL8K_AP_RXSTAT_WEP_DECRYPT_ICV_ERR 0x04
969 #define MWL8K_AP_RXSTAT_TKIP_DECRYPT_ICV_ERR 0x08
970
971 static void mwl8k_rxd_ap_init(void *_rxd, dma_addr_t next_dma_addr)
972 {
973 struct mwl8k_rxd_ap *rxd = _rxd;
974
975 rxd->next_rxd_phys_addr = cpu_to_le32(next_dma_addr);
976 rxd->rx_ctrl = MWL8K_AP_RX_CTRL_OWNED_BY_HOST;
977 }
978
979 static void mwl8k_rxd_ap_refill(void *_rxd, dma_addr_t addr, int len)
980 {
981 struct mwl8k_rxd_ap *rxd = _rxd;
982
983 rxd->pkt_len = cpu_to_le16(len);
984 rxd->pkt_phys_addr = cpu_to_le32(addr);
985 wmb();
986 rxd->rx_ctrl = 0;
987 }
988
989 static int
990 mwl8k_rxd_ap_process(void *_rxd, struct ieee80211_rx_status *status,
991 __le16 *qos, s8 *noise)
992 {
993 struct mwl8k_rxd_ap *rxd = _rxd;
994
995 if (!(rxd->rx_ctrl & MWL8K_AP_RX_CTRL_OWNED_BY_HOST))
996 return -1;
997 rmb();
998
999 memset(status, 0, sizeof(*status));
1000
1001 status->signal = -rxd->rssi;
1002 *noise = -rxd->noise_floor;
1003
1004 if (rxd->rate & MWL8K_AP_RATE_INFO_MCS_FORMAT) {
1005 status->encoding = RX_ENC_HT;
1006 if (rxd->rate & MWL8K_AP_RATE_INFO_40MHZ)
1007 status->bw = RATE_INFO_BW_40;
1008 status->rate_idx = MWL8K_AP_RATE_INFO_RATEID(rxd->rate);
1009 } else {
1010 int i;
1011
1012 for (i = 0; i < ARRAY_SIZE(mwl8k_rates_24); i++) {
1013 if (mwl8k_rates_24[i].hw_value == rxd->rate) {
1014 status->rate_idx = i;
1015 break;
1016 }
1017 }
1018 }
1019
1020 if (rxd->channel > 14) {
1021 status->band = NL80211_BAND_5GHZ;
1022 if (!(status->encoding == RX_ENC_HT) &&
1023 status->rate_idx >= MWL8K_LEGACY_5G_RATE_OFFSET)
1024 status->rate_idx -= MWL8K_LEGACY_5G_RATE_OFFSET;
1025 } else {
1026 status->band = NL80211_BAND_2GHZ;
1027 }
1028 status->freq = ieee80211_channel_to_frequency(rxd->channel,
1029 status->band);
1030
1031 *qos = rxd->qos_control;
1032
1033 if ((rxd->rx_status != MWL8K_AP_RXSTAT_GENERAL_DECRYPT_ERR) &&
1034 (rxd->rx_status & MWL8K_AP_RXSTAT_DECRYPT_ERR_MASK) &&
1035 (rxd->rx_status & MWL8K_AP_RXSTAT_TKIP_DECRYPT_MIC_ERR))
1036 status->flag |= RX_FLAG_MMIC_ERROR;
1037
1038 return le16_to_cpu(rxd->pkt_len);
1039 }
1040
1041 static struct rxd_ops rxd_ap_ops = {
1042 .rxd_size = sizeof(struct mwl8k_rxd_ap),
1043 .rxd_init = mwl8k_rxd_ap_init,
1044 .rxd_refill = mwl8k_rxd_ap_refill,
1045 .rxd_process = mwl8k_rxd_ap_process,
1046 };
1047
1048 /*
1049 * Packet reception for STA firmware.
1050 */
1051 struct mwl8k_rxd_sta {
1052 __le16 pkt_len;
1053 __u8 link_quality;
1054 __u8 noise_level;
1055 __le32 pkt_phys_addr;
1056 __le32 next_rxd_phys_addr;
1057 __le16 qos_control;
1058 __le16 rate_info;
1059 __le32 pad0[4];
1060 __u8 rssi;
1061 __u8 channel;
1062 __le16 pad1;
1063 __u8 rx_ctrl;
1064 __u8 rx_status;
1065 __u8 pad2[2];
1066 } __packed;
1067
1068 #define MWL8K_STA_RATE_INFO_SHORTPRE 0x8000
1069 #define MWL8K_STA_RATE_INFO_ANTSELECT(x) (((x) >> 11) & 0x3)
1070 #define MWL8K_STA_RATE_INFO_RATEID(x) (((x) >> 3) & 0x3f)
1071 #define MWL8K_STA_RATE_INFO_40MHZ 0x0004
1072 #define MWL8K_STA_RATE_INFO_SHORTGI 0x0002
1073 #define MWL8K_STA_RATE_INFO_MCS_FORMAT 0x0001
1074
1075 #define MWL8K_STA_RX_CTRL_OWNED_BY_HOST 0x02
1076 #define MWL8K_STA_RX_CTRL_DECRYPT_ERROR 0x04
1077 /* ICV=0 or MIC=1 */
1078 #define MWL8K_STA_RX_CTRL_DEC_ERR_TYPE 0x08
1079 /* Key is uploaded only in failure case */
1080 #define MWL8K_STA_RX_CTRL_KEY_INDEX 0x30
1081
1082 static void mwl8k_rxd_sta_init(void *_rxd, dma_addr_t next_dma_addr)
1083 {
1084 struct mwl8k_rxd_sta *rxd = _rxd;
1085
1086 rxd->next_rxd_phys_addr = cpu_to_le32(next_dma_addr);
1087 rxd->rx_ctrl = MWL8K_STA_RX_CTRL_OWNED_BY_HOST;
1088 }
1089
1090 static void mwl8k_rxd_sta_refill(void *_rxd, dma_addr_t addr, int len)
1091 {
1092 struct mwl8k_rxd_sta *rxd = _rxd;
1093
1094 rxd->pkt_len = cpu_to_le16(len);
1095 rxd->pkt_phys_addr = cpu_to_le32(addr);
1096 wmb();
1097 rxd->rx_ctrl = 0;
1098 }
1099
1100 static int
1101 mwl8k_rxd_sta_process(void *_rxd, struct ieee80211_rx_status *status,
1102 __le16 *qos, s8 *noise)
1103 {
1104 struct mwl8k_rxd_sta *rxd = _rxd;
1105 u16 rate_info;
1106
1107 if (!(rxd->rx_ctrl & MWL8K_STA_RX_CTRL_OWNED_BY_HOST))
1108 return -1;
1109 rmb();
1110
1111 rate_info = le16_to_cpu(rxd->rate_info);
1112
1113 memset(status, 0, sizeof(*status));
1114
1115 status->signal = -rxd->rssi;
1116 *noise = -rxd->noise_level;
1117 status->antenna = MWL8K_STA_RATE_INFO_ANTSELECT(rate_info);
1118 status->rate_idx = MWL8K_STA_RATE_INFO_RATEID(rate_info);
1119
1120 if (rate_info & MWL8K_STA_RATE_INFO_SHORTPRE)
1121 status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
1122 if (rate_info & MWL8K_STA_RATE_INFO_40MHZ)
1123 status->bw = RATE_INFO_BW_40;
1124 if (rate_info & MWL8K_STA_RATE_INFO_SHORTGI)
1125 status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
1126 if (rate_info & MWL8K_STA_RATE_INFO_MCS_FORMAT)
1127 status->encoding = RX_ENC_HT;
1128
1129 if (rxd->channel > 14) {
1130 status->band = NL80211_BAND_5GHZ;
1131 if (!(status->encoding == RX_ENC_HT) &&
1132 status->rate_idx >= MWL8K_LEGACY_5G_RATE_OFFSET)
1133 status->rate_idx -= MWL8K_LEGACY_5G_RATE_OFFSET;
1134 } else {
1135 status->band = NL80211_BAND_2GHZ;
1136 }
1137 status->freq = ieee80211_channel_to_frequency(rxd->channel,
1138 status->band);
1139
1140 *qos = rxd->qos_control;
1141 if ((rxd->rx_ctrl & MWL8K_STA_RX_CTRL_DECRYPT_ERROR) &&
1142 (rxd->rx_ctrl & MWL8K_STA_RX_CTRL_DEC_ERR_TYPE))
1143 status->flag |= RX_FLAG_MMIC_ERROR;
1144
1145 return le16_to_cpu(rxd->pkt_len);
1146 }
1147
1148 static struct rxd_ops rxd_sta_ops = {
1149 .rxd_size = sizeof(struct mwl8k_rxd_sta),
1150 .rxd_init = mwl8k_rxd_sta_init,
1151 .rxd_refill = mwl8k_rxd_sta_refill,
1152 .rxd_process = mwl8k_rxd_sta_process,
1153 };
1154
1155
1156 #define MWL8K_RX_DESCS 256
1157 #define MWL8K_RX_MAXSZ 3800
1158
1159 static int mwl8k_rxq_init(struct ieee80211_hw *hw, int index)
1160 {
1161 struct mwl8k_priv *priv = hw->priv;
1162 struct mwl8k_rx_queue *rxq = priv->rxq + index;
1163 int size;
1164 int i;
1165
1166 rxq->rxd_count = 0;
1167 rxq->head = 0;
1168 rxq->tail = 0;
1169
1170 size = MWL8K_RX_DESCS * priv->rxd_ops->rxd_size;
1171
1172 rxq->rxd = pci_zalloc_consistent(priv->pdev, size, &rxq->rxd_dma);
1173 if (rxq->rxd == NULL) {
1174 wiphy_err(hw->wiphy, "failed to alloc RX descriptors\n");
1175 return -ENOMEM;
1176 }
1177
1178 rxq->buf = kcalloc(MWL8K_RX_DESCS, sizeof(*rxq->buf), GFP_KERNEL);
1179 if (rxq->buf == NULL) {
1180 pci_free_consistent(priv->pdev, size, rxq->rxd, rxq->rxd_dma);
1181 return -ENOMEM;
1182 }
1183
1184 for (i = 0; i < MWL8K_RX_DESCS; i++) {
1185 int desc_size;
1186 void *rxd;
1187 int nexti;
1188 dma_addr_t next_dma_addr;
1189
1190 desc_size = priv->rxd_ops->rxd_size;
1191 rxd = rxq->rxd + (i * priv->rxd_ops->rxd_size);
1192
1193 nexti = i + 1;
1194 if (nexti == MWL8K_RX_DESCS)
1195 nexti = 0;
1196 next_dma_addr = rxq->rxd_dma + (nexti * desc_size);
1197
1198 priv->rxd_ops->rxd_init(rxd, next_dma_addr);
1199 }
1200
1201 return 0;
1202 }
1203
1204 static int rxq_refill(struct ieee80211_hw *hw, int index, int limit)
1205 {
1206 struct mwl8k_priv *priv = hw->priv;
1207 struct mwl8k_rx_queue *rxq = priv->rxq + index;
1208 int refilled;
1209
1210 refilled = 0;
1211 while (rxq->rxd_count < MWL8K_RX_DESCS && limit--) {
1212 struct sk_buff *skb;
1213 dma_addr_t addr;
1214 int rx;
1215 void *rxd;
1216
1217 skb = dev_alloc_skb(MWL8K_RX_MAXSZ);
1218 if (skb == NULL)
1219 break;
1220
1221 addr = pci_map_single(priv->pdev, skb->data,
1222 MWL8K_RX_MAXSZ, DMA_FROM_DEVICE);
1223
1224 rxq->rxd_count++;
1225 rx = rxq->tail++;
1226 if (rxq->tail == MWL8K_RX_DESCS)
1227 rxq->tail = 0;
1228 rxq->buf[rx].skb = skb;
1229 dma_unmap_addr_set(&rxq->buf[rx], dma, addr);
1230
1231 rxd = rxq->rxd + (rx * priv->rxd_ops->rxd_size);
1232 priv->rxd_ops->rxd_refill(rxd, addr, MWL8K_RX_MAXSZ);
1233
1234 refilled++;
1235 }
1236
1237 return refilled;
1238 }
1239
1240 /* Must be called only when the card's reception is completely halted */
1241 static void mwl8k_rxq_deinit(struct ieee80211_hw *hw, int index)
1242 {
1243 struct mwl8k_priv *priv = hw->priv;
1244 struct mwl8k_rx_queue *rxq = priv->rxq + index;
1245 int i;
1246
1247 if (rxq->rxd == NULL)
1248 return;
1249
1250 for (i = 0; i < MWL8K_RX_DESCS; i++) {
1251 if (rxq->buf[i].skb != NULL) {
1252 pci_unmap_single(priv->pdev,
1253 dma_unmap_addr(&rxq->buf[i], dma),
1254 MWL8K_RX_MAXSZ, PCI_DMA_FROMDEVICE);
1255 dma_unmap_addr_set(&rxq->buf[i], dma, 0);
1256
1257 kfree_skb(rxq->buf[i].skb);
1258 rxq->buf[i].skb = NULL;
1259 }
1260 }
1261
1262 kfree(rxq->buf);
1263 rxq->buf = NULL;
1264
1265 pci_free_consistent(priv->pdev,
1266 MWL8K_RX_DESCS * priv->rxd_ops->rxd_size,
1267 rxq->rxd, rxq->rxd_dma);
1268 rxq->rxd = NULL;
1269 }
1270
1271
1272 /*
1273 * Scan a list of BSSIDs to process for finalize join.
1274 * Allows for extension to process multiple BSSIDs.
1275 */
1276 static inline int
1277 mwl8k_capture_bssid(struct mwl8k_priv *priv, struct ieee80211_hdr *wh)
1278 {
1279 return priv->capture_beacon &&
1280 ieee80211_is_beacon(wh->frame_control) &&
1281 ether_addr_equal_64bits(wh->addr3, priv->capture_bssid);
1282 }
1283
1284 static inline void mwl8k_save_beacon(struct ieee80211_hw *hw,
1285 struct sk_buff *skb)
1286 {
1287 struct mwl8k_priv *priv = hw->priv;
1288
1289 priv->capture_beacon = false;
1290 eth_zero_addr(priv->capture_bssid);
1291
1292 /*
1293 * Use GFP_ATOMIC as rxq_process is called from
1294 * the primary interrupt handler, memory allocation call
1295 * must not sleep.
1296 */
1297 priv->beacon_skb = skb_copy(skb, GFP_ATOMIC);
1298 if (priv->beacon_skb != NULL)
1299 ieee80211_queue_work(hw, &priv->finalize_join_worker);
1300 }
1301
1302 static inline struct mwl8k_vif *mwl8k_find_vif_bss(struct list_head *vif_list,
1303 u8 *bssid)
1304 {
1305 struct mwl8k_vif *mwl8k_vif;
1306
1307 list_for_each_entry(mwl8k_vif,
1308 vif_list, list) {
1309 if (memcmp(bssid, mwl8k_vif->bssid,
1310 ETH_ALEN) == 0)
1311 return mwl8k_vif;
1312 }
1313
1314 return NULL;
1315 }
1316
1317 static int rxq_process(struct ieee80211_hw *hw, int index, int limit)
1318 {
1319 struct mwl8k_priv *priv = hw->priv;
1320 struct mwl8k_vif *mwl8k_vif = NULL;
1321 struct mwl8k_rx_queue *rxq = priv->rxq + index;
1322 int processed;
1323
1324 processed = 0;
1325 while (rxq->rxd_count && limit--) {
1326 struct sk_buff *skb;
1327 void *rxd;
1328 int pkt_len;
1329 struct ieee80211_rx_status status;
1330 struct ieee80211_hdr *wh;
1331 __le16 qos;
1332
1333 skb = rxq->buf[rxq->head].skb;
1334 if (skb == NULL)
1335 break;
1336
1337 rxd = rxq->rxd + (rxq->head * priv->rxd_ops->rxd_size);
1338
1339 pkt_len = priv->rxd_ops->rxd_process(rxd, &status, &qos,
1340 &priv->noise);
1341 if (pkt_len < 0)
1342 break;
1343
1344 rxq->buf[rxq->head].skb = NULL;
1345
1346 pci_unmap_single(priv->pdev,
1347 dma_unmap_addr(&rxq->buf[rxq->head], dma),
1348 MWL8K_RX_MAXSZ, PCI_DMA_FROMDEVICE);
1349 dma_unmap_addr_set(&rxq->buf[rxq->head], dma, 0);
1350
1351 rxq->head++;
1352 if (rxq->head == MWL8K_RX_DESCS)
1353 rxq->head = 0;
1354
1355 rxq->rxd_count--;
1356
1357 wh = &((struct mwl8k_dma_data *)skb->data)->wh;
1358
1359 /*
1360 * Check for a pending join operation. Save a
1361 * copy of the beacon and schedule a tasklet to
1362 * send a FINALIZE_JOIN command to the firmware.
1363 */
1364 if (mwl8k_capture_bssid(priv, (void *)skb->data))
1365 mwl8k_save_beacon(hw, skb);
1366
1367 if (ieee80211_has_protected(wh->frame_control)) {
1368
1369 /* Check if hw crypto has been enabled for
1370 * this bss. If yes, set the status flags
1371 * accordingly
1372 */
1373 mwl8k_vif = mwl8k_find_vif_bss(&priv->vif_list,
1374 wh->addr1);
1375
1376 if (mwl8k_vif != NULL &&
1377 mwl8k_vif->is_hw_crypto_enabled) {
1378 /*
1379 * When MMIC ERROR is encountered
1380 * by the firmware, payload is
1381 * dropped and only 32 bytes of
1382 * mwl8k Firmware header is sent
1383 * to the host.
1384 *
1385 * We need to add four bytes of
1386 * key information. In it
1387 * MAC80211 expects keyidx set to
1388 * 0 for triggering Counter
1389 * Measure of MMIC failure.
1390 */
1391 if (status.flag & RX_FLAG_MMIC_ERROR) {
1392 struct mwl8k_dma_data *tr;
1393 tr = (struct mwl8k_dma_data *)skb->data;
1394 memset((void *)&(tr->data), 0, 4);
1395 pkt_len += 4;
1396 }
1397
1398 if (!ieee80211_is_auth(wh->frame_control))
1399 status.flag |= RX_FLAG_IV_STRIPPED |
1400 RX_FLAG_DECRYPTED |
1401 RX_FLAG_MMIC_STRIPPED;
1402 }
1403 }
1404
1405 skb_put(skb, pkt_len);
1406 mwl8k_remove_dma_header(skb, qos);
1407 memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
1408 ieee80211_rx_irqsafe(hw, skb);
1409
1410 processed++;
1411 }
1412
1413 return processed;
1414 }
1415
1416
1417 /*
1418 * Packet transmission.
1419 */
1420
1421 #define MWL8K_TXD_STATUS_OK 0x00000001
1422 #define MWL8K_TXD_STATUS_OK_RETRY 0x00000002
1423 #define MWL8K_TXD_STATUS_OK_MORE_RETRY 0x00000004
1424 #define MWL8K_TXD_STATUS_MULTICAST_TX 0x00000008
1425 #define MWL8K_TXD_STATUS_FW_OWNED 0x80000000
1426
1427 #define MWL8K_QOS_QLEN_UNSPEC 0xff00
1428 #define MWL8K_QOS_ACK_POLICY_MASK 0x0060
1429 #define MWL8K_QOS_ACK_POLICY_NORMAL 0x0000
1430 #define MWL8K_QOS_ACK_POLICY_BLOCKACK 0x0060
1431 #define MWL8K_QOS_EOSP 0x0010
1432
1433 struct mwl8k_tx_desc {
1434 __le32 status;
1435 __u8 data_rate;
1436 __u8 tx_priority;
1437 __le16 qos_control;
1438 __le32 pkt_phys_addr;
1439 __le16 pkt_len;
1440 __u8 dest_MAC_addr[ETH_ALEN];
1441 __le32 next_txd_phys_addr;
1442 __le32 timestamp;
1443 __le16 rate_info;
1444 __u8 peer_id;
1445 __u8 tx_frag_cnt;
1446 } __packed;
1447
1448 #define MWL8K_TX_DESCS 128
1449
1450 static int mwl8k_txq_init(struct ieee80211_hw *hw, int index)
1451 {
1452 struct mwl8k_priv *priv = hw->priv;
1453 struct mwl8k_tx_queue *txq = priv->txq + index;
1454 int size;
1455 int i;
1456
1457 txq->len = 0;
1458 txq->head = 0;
1459 txq->tail = 0;
1460
1461 size = MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc);
1462
1463 txq->txd = pci_zalloc_consistent(priv->pdev, size, &txq->txd_dma);
1464 if (txq->txd == NULL) {
1465 wiphy_err(hw->wiphy, "failed to alloc TX descriptors\n");
1466 return -ENOMEM;
1467 }
1468
1469 txq->skb = kcalloc(MWL8K_TX_DESCS, sizeof(*txq->skb), GFP_KERNEL);
1470 if (txq->skb == NULL) {
1471 pci_free_consistent(priv->pdev, size, txq->txd, txq->txd_dma);
1472 return -ENOMEM;
1473 }
1474
1475 for (i = 0; i < MWL8K_TX_DESCS; i++) {
1476 struct mwl8k_tx_desc *tx_desc;
1477 int nexti;
1478
1479 tx_desc = txq->txd + i;
1480 nexti = (i + 1) % MWL8K_TX_DESCS;
1481
1482 tx_desc->status = 0;
1483 tx_desc->next_txd_phys_addr =
1484 cpu_to_le32(txq->txd_dma + nexti * sizeof(*tx_desc));
1485 }
1486
1487 return 0;
1488 }
1489
1490 static inline void mwl8k_tx_start(struct mwl8k_priv *priv)
1491 {
1492 iowrite32(MWL8K_H2A_INT_PPA_READY,
1493 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
1494 iowrite32(MWL8K_H2A_INT_DUMMY,
1495 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
1496 ioread32(priv->regs + MWL8K_HIU_INT_CODE);
1497 }
1498
1499 static void mwl8k_dump_tx_rings(struct ieee80211_hw *hw)
1500 {
1501 struct mwl8k_priv *priv = hw->priv;
1502 int i;
1503
1504 for (i = 0; i < mwl8k_tx_queues(priv); i++) {
1505 struct mwl8k_tx_queue *txq = priv->txq + i;
1506 int fw_owned = 0;
1507 int drv_owned = 0;
1508 int unused = 0;
1509 int desc;
1510
1511 for (desc = 0; desc < MWL8K_TX_DESCS; desc++) {
1512 struct mwl8k_tx_desc *tx_desc = txq->txd + desc;
1513 u32 status;
1514
1515 status = le32_to_cpu(tx_desc->status);
1516 if (status & MWL8K_TXD_STATUS_FW_OWNED)
1517 fw_owned++;
1518 else
1519 drv_owned++;
1520
1521 if (tx_desc->pkt_len == 0)
1522 unused++;
1523 }
1524
1525 wiphy_err(hw->wiphy,
1526 "txq[%d] len=%d head=%d tail=%d "
1527 "fw_owned=%d drv_owned=%d unused=%d\n",
1528 i,
1529 txq->len, txq->head, txq->tail,
1530 fw_owned, drv_owned, unused);
1531 }
1532 }
1533
1534 /*
1535 * Must be called with priv->fw_mutex held and tx queues stopped.
1536 */
1537 #define MWL8K_TX_WAIT_TIMEOUT_MS 5000
1538
1539 static int mwl8k_tx_wait_empty(struct ieee80211_hw *hw)
1540 {
1541 struct mwl8k_priv *priv = hw->priv;
1542 DECLARE_COMPLETION_ONSTACK(tx_wait);
1543 int retry;
1544 int rc;
1545
1546 might_sleep();
1547
1548 /* Since fw restart is in progress, allow only the firmware
1549 * commands from the restart code and block the other
1550 * commands since they are going to fail in any case since
1551 * the firmware has crashed
1552 */
1553 if (priv->hw_restart_in_progress) {
1554 if (priv->hw_restart_owner == current)
1555 return 0;
1556 else
1557 return -EBUSY;
1558 }
1559
1560 if (atomic_read(&priv->watchdog_event_pending))
1561 return 0;
1562
1563 /*
1564 * The TX queues are stopped at this point, so this test
1565 * doesn't need to take ->tx_lock.
1566 */
1567 if (!priv->pending_tx_pkts)
1568 return 0;
1569
1570 retry = 1;
1571 rc = 0;
1572
1573 spin_lock_bh(&priv->tx_lock);
1574 priv->tx_wait = &tx_wait;
1575 while (!rc) {
1576 int oldcount;
1577 unsigned long timeout;
1578
1579 oldcount = priv->pending_tx_pkts;
1580
1581 spin_unlock_bh(&priv->tx_lock);
1582 timeout = wait_for_completion_timeout(&tx_wait,
1583 msecs_to_jiffies(MWL8K_TX_WAIT_TIMEOUT_MS));
1584
1585 if (atomic_read(&priv->watchdog_event_pending)) {
1586 spin_lock_bh(&priv->tx_lock);
1587 priv->tx_wait = NULL;
1588 spin_unlock_bh(&priv->tx_lock);
1589 return 0;
1590 }
1591
1592 spin_lock_bh(&priv->tx_lock);
1593
1594 if (timeout || !priv->pending_tx_pkts) {
1595 WARN_ON(priv->pending_tx_pkts);
1596 if (retry)
1597 wiphy_notice(hw->wiphy, "tx rings drained\n");
1598 break;
1599 }
1600
1601 if (retry) {
1602 mwl8k_tx_start(priv);
1603 retry = 0;
1604 continue;
1605 }
1606
1607 if (priv->pending_tx_pkts < oldcount) {
1608 wiphy_notice(hw->wiphy,
1609 "waiting for tx rings to drain (%d -> %d pkts)\n",
1610 oldcount, priv->pending_tx_pkts);
1611 retry = 1;
1612 continue;
1613 }
1614
1615 priv->tx_wait = NULL;
1616
1617 wiphy_err(hw->wiphy, "tx rings stuck for %d ms\n",
1618 MWL8K_TX_WAIT_TIMEOUT_MS);
1619 mwl8k_dump_tx_rings(hw);
1620 priv->hw_restart_in_progress = true;
1621 ieee80211_queue_work(hw, &priv->fw_reload);
1622
1623 rc = -ETIMEDOUT;
1624 }
1625 priv->tx_wait = NULL;
1626 spin_unlock_bh(&priv->tx_lock);
1627
1628 return rc;
1629 }
1630
1631 #define MWL8K_TXD_SUCCESS(status) \
1632 ((status) & (MWL8K_TXD_STATUS_OK | \
1633 MWL8K_TXD_STATUS_OK_RETRY | \
1634 MWL8K_TXD_STATUS_OK_MORE_RETRY))
1635
1636 static int mwl8k_tid_queue_mapping(u8 tid)
1637 {
1638 BUG_ON(tid > 7);
1639
1640 switch (tid) {
1641 case 0:
1642 case 3:
1643 return IEEE80211_AC_BE;
1644 case 1:
1645 case 2:
1646 return IEEE80211_AC_BK;
1647 case 4:
1648 case 5:
1649 return IEEE80211_AC_VI;
1650 case 6:
1651 case 7:
1652 return IEEE80211_AC_VO;
1653 default:
1654 return -1;
1655 }
1656 }
1657
1658 /* The firmware will fill in the rate information
1659 * for each packet that gets queued in the hardware
1660 * and these macros will interpret that info.
1661 */
1662
1663 #define RI_FORMAT(a) (a & 0x0001)
1664 #define RI_RATE_ID_MCS(a) ((a & 0x01f8) >> 3)
1665
1666 static int
1667 mwl8k_txq_reclaim(struct ieee80211_hw *hw, int index, int limit, int force)
1668 {
1669 struct mwl8k_priv *priv = hw->priv;
1670 struct mwl8k_tx_queue *txq = priv->txq + index;
1671 int processed;
1672
1673 processed = 0;
1674 while (txq->len > 0 && limit--) {
1675 int tx;
1676 struct mwl8k_tx_desc *tx_desc;
1677 unsigned long addr;
1678 int size;
1679 struct sk_buff *skb;
1680 struct ieee80211_tx_info *info;
1681 u32 status;
1682 struct ieee80211_sta *sta;
1683 struct mwl8k_sta *sta_info = NULL;
1684 u16 rate_info;
1685 struct ieee80211_hdr *wh;
1686
1687 tx = txq->head;
1688 tx_desc = txq->txd + tx;
1689
1690 status = le32_to_cpu(tx_desc->status);
1691
1692 if (status & MWL8K_TXD_STATUS_FW_OWNED) {
1693 if (!force)
1694 break;
1695 tx_desc->status &=
1696 ~cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED);
1697 }
1698
1699 txq->head = (tx + 1) % MWL8K_TX_DESCS;
1700 BUG_ON(txq->len == 0);
1701 txq->len--;
1702 priv->pending_tx_pkts--;
1703
1704 addr = le32_to_cpu(tx_desc->pkt_phys_addr);
1705 size = le16_to_cpu(tx_desc->pkt_len);
1706 skb = txq->skb[tx];
1707 txq->skb[tx] = NULL;
1708
1709 BUG_ON(skb == NULL);
1710 pci_unmap_single(priv->pdev, addr, size, PCI_DMA_TODEVICE);
1711
1712 mwl8k_remove_dma_header(skb, tx_desc->qos_control);
1713
1714 wh = (struct ieee80211_hdr *) skb->data;
1715
1716 /* Mark descriptor as unused */
1717 tx_desc->pkt_phys_addr = 0;
1718 tx_desc->pkt_len = 0;
1719
1720 info = IEEE80211_SKB_CB(skb);
1721 if (ieee80211_is_data(wh->frame_control)) {
1722 rcu_read_lock();
1723 sta = ieee80211_find_sta_by_ifaddr(hw, wh->addr1,
1724 wh->addr2);
1725 if (sta) {
1726 sta_info = MWL8K_STA(sta);
1727 BUG_ON(sta_info == NULL);
1728 rate_info = le16_to_cpu(tx_desc->rate_info);
1729 /* If rate is < 6.5 Mpbs for an ht station
1730 * do not form an ampdu. If the station is a
1731 * legacy station (format = 0), do not form an
1732 * ampdu
1733 */
1734 if (RI_RATE_ID_MCS(rate_info) < 1 ||
1735 RI_FORMAT(rate_info) == 0) {
1736 sta_info->is_ampdu_allowed = false;
1737 } else {
1738 sta_info->is_ampdu_allowed = true;
1739 }
1740 }
1741 rcu_read_unlock();
1742 }
1743
1744 ieee80211_tx_info_clear_status(info);
1745
1746 /* Rate control is happening in the firmware.
1747 * Ensure no tx rate is being reported.
1748 */
1749 info->status.rates[0].idx = -1;
1750 info->status.rates[0].count = 1;
1751
1752 if (MWL8K_TXD_SUCCESS(status))
1753 info->flags |= IEEE80211_TX_STAT_ACK;
1754
1755 ieee80211_tx_status_irqsafe(hw, skb);
1756
1757 processed++;
1758 }
1759
1760 return processed;
1761 }
1762
1763 /* must be called only when the card's transmit is completely halted */
1764 static void mwl8k_txq_deinit(struct ieee80211_hw *hw, int index)
1765 {
1766 struct mwl8k_priv *priv = hw->priv;
1767 struct mwl8k_tx_queue *txq = priv->txq + index;
1768
1769 if (txq->txd == NULL)
1770 return;
1771
1772 mwl8k_txq_reclaim(hw, index, INT_MAX, 1);
1773
1774 kfree(txq->skb);
1775 txq->skb = NULL;
1776
1777 pci_free_consistent(priv->pdev,
1778 MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc),
1779 txq->txd, txq->txd_dma);
1780 txq->txd = NULL;
1781 }
1782
1783 /* caller must hold priv->stream_lock when calling the stream functions */
1784 static struct mwl8k_ampdu_stream *
1785 mwl8k_add_stream(struct ieee80211_hw *hw, struct ieee80211_sta *sta, u8 tid)
1786 {
1787 struct mwl8k_ampdu_stream *stream;
1788 struct mwl8k_priv *priv = hw->priv;
1789 int i;
1790
1791 for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
1792 stream = &priv->ampdu[i];
1793 if (stream->state == AMPDU_NO_STREAM) {
1794 stream->sta = sta;
1795 stream->state = AMPDU_STREAM_NEW;
1796 stream->tid = tid;
1797 stream->idx = i;
1798 wiphy_debug(hw->wiphy, "Added a new stream for %pM %d",
1799 sta->addr, tid);
1800 return stream;
1801 }
1802 }
1803 return NULL;
1804 }
1805
1806 static int
1807 mwl8k_start_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream)
1808 {
1809 int ret;
1810
1811 /* if the stream has already been started, don't start it again */
1812 if (stream->state != AMPDU_STREAM_NEW)
1813 return 0;
1814 ret = ieee80211_start_tx_ba_session(stream->sta, stream->tid, 0);
1815 if (ret)
1816 wiphy_debug(hw->wiphy, "Failed to start stream for %pM %d: "
1817 "%d\n", stream->sta->addr, stream->tid, ret);
1818 else
1819 wiphy_debug(hw->wiphy, "Started stream for %pM %d\n",
1820 stream->sta->addr, stream->tid);
1821 return ret;
1822 }
1823
1824 static void
1825 mwl8k_remove_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream)
1826 {
1827 wiphy_debug(hw->wiphy, "Remove stream for %pM %d\n", stream->sta->addr,
1828 stream->tid);
1829 memset(stream, 0, sizeof(*stream));
1830 }
1831
1832 static struct mwl8k_ampdu_stream *
1833 mwl8k_lookup_stream(struct ieee80211_hw *hw, u8 *addr, u8 tid)
1834 {
1835 struct mwl8k_priv *priv = hw->priv;
1836 int i;
1837
1838 for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
1839 struct mwl8k_ampdu_stream *stream;
1840 stream = &priv->ampdu[i];
1841 if (stream->state == AMPDU_NO_STREAM)
1842 continue;
1843 if (!memcmp(stream->sta->addr, addr, ETH_ALEN) &&
1844 stream->tid == tid)
1845 return stream;
1846 }
1847 return NULL;
1848 }
1849
1850 #define MWL8K_AMPDU_PACKET_THRESHOLD 64
1851 static inline bool mwl8k_ampdu_allowed(struct ieee80211_sta *sta, u8 tid)
1852 {
1853 struct mwl8k_sta *sta_info = MWL8K_STA(sta);
1854 struct tx_traffic_info *tx_stats;
1855
1856 BUG_ON(tid >= MWL8K_MAX_TID);
1857 tx_stats = &sta_info->tx_stats[tid];
1858
1859 return sta_info->is_ampdu_allowed &&
1860 tx_stats->pkts > MWL8K_AMPDU_PACKET_THRESHOLD;
1861 }
1862
1863 static inline void mwl8k_tx_count_packet(struct ieee80211_sta *sta, u8 tid)
1864 {
1865 struct mwl8k_sta *sta_info = MWL8K_STA(sta);
1866 struct tx_traffic_info *tx_stats;
1867
1868 BUG_ON(tid >= MWL8K_MAX_TID);
1869 tx_stats = &sta_info->tx_stats[tid];
1870
1871 if (tx_stats->start_time == 0)
1872 tx_stats->start_time = jiffies;
1873
1874 /* reset the packet count after each second elapses. If the number of
1875 * packets ever exceeds the ampdu_min_traffic threshold, we will allow
1876 * an ampdu stream to be started.
1877 */
1878 if (jiffies - tx_stats->start_time > HZ) {
1879 tx_stats->pkts = 0;
1880 tx_stats->start_time = 0;
1881 } else
1882 tx_stats->pkts++;
1883 }
1884
1885 /* The hardware ampdu queues start from 5.
1886 * txpriorities for ampdu queues are
1887 * 5 6 7 0 1 2 3 4 ie., queue 5 is highest
1888 * and queue 3 is lowest (queue 4 is reserved)
1889 */
1890 #define BA_QUEUE 5
1891
1892 static void
1893 mwl8k_txq_xmit(struct ieee80211_hw *hw,
1894 int index,
1895 struct ieee80211_sta *sta,
1896 struct sk_buff *skb)
1897 {
1898 struct mwl8k_priv *priv = hw->priv;
1899 struct ieee80211_tx_info *tx_info;
1900 struct mwl8k_vif *mwl8k_vif;
1901 struct ieee80211_hdr *wh;
1902 struct mwl8k_tx_queue *txq;
1903 struct mwl8k_tx_desc *tx;
1904 dma_addr_t dma;
1905 u32 txstatus;
1906 u8 txdatarate;
1907 u16 qos;
1908 int txpriority;
1909 u8 tid = 0;
1910 struct mwl8k_ampdu_stream *stream = NULL;
1911 bool start_ba_session = false;
1912 bool mgmtframe = false;
1913 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
1914 bool eapol_frame = false;
1915
1916 wh = (struct ieee80211_hdr *)skb->data;
1917 if (ieee80211_is_data_qos(wh->frame_control))
1918 qos = le16_to_cpu(*((__le16 *)ieee80211_get_qos_ctl(wh)));
1919 else
1920 qos = 0;
1921
1922 if (skb->protocol == cpu_to_be16(ETH_P_PAE))
1923 eapol_frame = true;
1924
1925 if (ieee80211_is_mgmt(wh->frame_control))
1926 mgmtframe = true;
1927
1928 if (priv->ap_fw)
1929 mwl8k_encapsulate_tx_frame(priv, skb);
1930 else
1931 mwl8k_add_dma_header(priv, skb, 0, 0);
1932
1933 wh = &((struct mwl8k_dma_data *)skb->data)->wh;
1934
1935 tx_info = IEEE80211_SKB_CB(skb);
1936 mwl8k_vif = MWL8K_VIF(tx_info->control.vif);
1937
1938 if (tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1939 wh->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1940 wh->seq_ctrl |= cpu_to_le16(mwl8k_vif->seqno);
1941 mwl8k_vif->seqno += 0x10;
1942 }
1943
1944 /* Setup firmware control bit fields for each frame type. */
1945 txstatus = 0;
1946 txdatarate = 0;
1947 if (ieee80211_is_mgmt(wh->frame_control) ||
1948 ieee80211_is_ctl(wh->frame_control)) {
1949 txdatarate = 0;
1950 qos |= MWL8K_QOS_QLEN_UNSPEC | MWL8K_QOS_EOSP;
1951 } else if (ieee80211_is_data(wh->frame_control)) {
1952 txdatarate = 1;
1953 if (is_multicast_ether_addr(wh->addr1))
1954 txstatus |= MWL8K_TXD_STATUS_MULTICAST_TX;
1955
1956 qos &= ~MWL8K_QOS_ACK_POLICY_MASK;
1957 if (tx_info->flags & IEEE80211_TX_CTL_AMPDU)
1958 qos |= MWL8K_QOS_ACK_POLICY_BLOCKACK;
1959 else
1960 qos |= MWL8K_QOS_ACK_POLICY_NORMAL;
1961 }
1962
1963 /* Queue ADDBA request in the respective data queue. While setting up
1964 * the ampdu stream, mac80211 queues further packets for that
1965 * particular ra/tid pair. However, packets piled up in the hardware
1966 * for that ra/tid pair will still go out. ADDBA request and the
1967 * related data packets going out from different queues asynchronously
1968 * will cause a shift in the receiver window which might result in
1969 * ampdu packets getting dropped at the receiver after the stream has
1970 * been setup.
1971 */
1972 if (unlikely(ieee80211_is_action(wh->frame_control) &&
1973 mgmt->u.action.category == WLAN_CATEGORY_BACK &&
1974 mgmt->u.action.u.addba_req.action_code == WLAN_ACTION_ADDBA_REQ &&
1975 priv->ap_fw)) {
1976 u16 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1977 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1978 index = mwl8k_tid_queue_mapping(tid);
1979 }
1980
1981 txpriority = index;
1982
1983 if (priv->ap_fw && sta && sta->ht_cap.ht_supported && !eapol_frame &&
1984 ieee80211_is_data_qos(wh->frame_control)) {
1985 tid = qos & 0xf;
1986 mwl8k_tx_count_packet(sta, tid);
1987 spin_lock(&priv->stream_lock);
1988 stream = mwl8k_lookup_stream(hw, sta->addr, tid);
1989 if (stream != NULL) {
1990 if (stream->state == AMPDU_STREAM_ACTIVE) {
1991 WARN_ON(!(qos & MWL8K_QOS_ACK_POLICY_BLOCKACK));
1992 txpriority = (BA_QUEUE + stream->idx) %
1993 TOTAL_HW_TX_QUEUES;
1994 if (stream->idx <= 1)
1995 index = stream->idx +
1996 MWL8K_TX_WMM_QUEUES;
1997
1998 } else if (stream->state == AMPDU_STREAM_NEW) {
1999 /* We get here if the driver sends us packets
2000 * after we've initiated a stream, but before
2001 * our ampdu_action routine has been called
2002 * with IEEE80211_AMPDU_TX_START to get the SSN
2003 * for the ADDBA request. So this packet can
2004 * go out with no risk of sequence number
2005 * mismatch. No special handling is required.
2006 */
2007 } else {
2008 /* Drop packets that would go out after the
2009 * ADDBA request was sent but before the ADDBA
2010 * response is received. If we don't do this,
2011 * the recipient would probably receive it
2012 * after the ADDBA request with SSN 0. This
2013 * will cause the recipient's BA receive window
2014 * to shift, which would cause the subsequent
2015 * packets in the BA stream to be discarded.
2016 * mac80211 queues our packets for us in this
2017 * case, so this is really just a safety check.
2018 */
2019 wiphy_warn(hw->wiphy,
2020 "Cannot send packet while ADDBA "
2021 "dialog is underway.\n");
2022 spin_unlock(&priv->stream_lock);
2023 dev_kfree_skb(skb);
2024 return;
2025 }
2026 } else {
2027 /* Defer calling mwl8k_start_stream so that the current
2028 * skb can go out before the ADDBA request. This
2029 * prevents sequence number mismatch at the recepient
2030 * as described above.
2031 */
2032 if (mwl8k_ampdu_allowed(sta, tid)) {
2033 stream = mwl8k_add_stream(hw, sta, tid);
2034 if (stream != NULL)
2035 start_ba_session = true;
2036 }
2037 }
2038 spin_unlock(&priv->stream_lock);
2039 } else {
2040 qos &= ~MWL8K_QOS_ACK_POLICY_MASK;
2041 qos |= MWL8K_QOS_ACK_POLICY_NORMAL;
2042 }
2043
2044 dma = pci_map_single(priv->pdev, skb->data,
2045 skb->len, PCI_DMA_TODEVICE);
2046
2047 if (pci_dma_mapping_error(priv->pdev, dma)) {
2048 wiphy_debug(hw->wiphy,
2049 "failed to dma map skb, dropping TX frame.\n");
2050 if (start_ba_session) {
2051 spin_lock(&priv->stream_lock);
2052 mwl8k_remove_stream(hw, stream);
2053 spin_unlock(&priv->stream_lock);
2054 }
2055 dev_kfree_skb(skb);
2056 return;
2057 }
2058
2059 spin_lock_bh(&priv->tx_lock);
2060
2061 txq = priv->txq + index;
2062
2063 /* Mgmt frames that go out frequently are probe
2064 * responses. Other mgmt frames got out relatively
2065 * infrequently. Hence reserve 2 buffers so that
2066 * other mgmt frames do not get dropped due to an
2067 * already queued probe response in one of the
2068 * reserved buffers.
2069 */
2070
2071 if (txq->len >= MWL8K_TX_DESCS - 2) {
2072 if (!mgmtframe || txq->len == MWL8K_TX_DESCS) {
2073 if (start_ba_session) {
2074 spin_lock(&priv->stream_lock);
2075 mwl8k_remove_stream(hw, stream);
2076 spin_unlock(&priv->stream_lock);
2077 }
2078 mwl8k_tx_start(priv);
2079 spin_unlock_bh(&priv->tx_lock);
2080 pci_unmap_single(priv->pdev, dma, skb->len,
2081 PCI_DMA_TODEVICE);
2082 dev_kfree_skb(skb);
2083 return;
2084 }
2085 }
2086
2087 BUG_ON(txq->skb[txq->tail] != NULL);
2088 txq->skb[txq->tail] = skb;
2089
2090 tx = txq->txd + txq->tail;
2091 tx->data_rate = txdatarate;
2092 tx->tx_priority = txpriority;
2093 tx->qos_control = cpu_to_le16(qos);
2094 tx->pkt_phys_addr = cpu_to_le32(dma);
2095 tx->pkt_len = cpu_to_le16(skb->len);
2096 tx->rate_info = 0;
2097 if (!priv->ap_fw && sta != NULL)
2098 tx->peer_id = MWL8K_STA(sta)->peer_id;
2099 else
2100 tx->peer_id = 0;
2101
2102 if (priv->ap_fw && ieee80211_is_data(wh->frame_control) && !eapol_frame)
2103 tx->timestamp = cpu_to_le32(ioread32(priv->regs +
2104 MWL8K_HW_TIMER_REGISTER));
2105 else
2106 tx->timestamp = 0;
2107
2108 wmb();
2109 tx->status = cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED | txstatus);
2110
2111 txq->len++;
2112 priv->pending_tx_pkts++;
2113
2114 txq->tail++;
2115 if (txq->tail == MWL8K_TX_DESCS)
2116 txq->tail = 0;
2117
2118 mwl8k_tx_start(priv);
2119
2120 spin_unlock_bh(&priv->tx_lock);
2121
2122 /* Initiate the ampdu session here */
2123 if (start_ba_session) {
2124 spin_lock(&priv->stream_lock);
2125 if (mwl8k_start_stream(hw, stream))
2126 mwl8k_remove_stream(hw, stream);
2127 spin_unlock(&priv->stream_lock);
2128 }
2129 }
2130
2131
2132 /*
2133 * Firmware access.
2134 *
2135 * We have the following requirements for issuing firmware commands:
2136 * - Some commands require that the packet transmit path is idle when
2137 * the command is issued. (For simplicity, we'll just quiesce the
2138 * transmit path for every command.)
2139 * - There are certain sequences of commands that need to be issued to
2140 * the hardware sequentially, with no other intervening commands.
2141 *
2142 * This leads to an implementation of a "firmware lock" as a mutex that
2143 * can be taken recursively, and which is taken by both the low-level
2144 * command submission function (mwl8k_post_cmd) as well as any users of
2145 * that function that require issuing of an atomic sequence of commands,
2146 * and quiesces the transmit path whenever it's taken.
2147 */
2148 static int mwl8k_fw_lock(struct ieee80211_hw *hw)
2149 {
2150 struct mwl8k_priv *priv = hw->priv;
2151
2152 if (priv->fw_mutex_owner != current) {
2153 int rc;
2154
2155 mutex_lock(&priv->fw_mutex);
2156 ieee80211_stop_queues(hw);
2157
2158 rc = mwl8k_tx_wait_empty(hw);
2159 if (rc) {
2160 if (!priv->hw_restart_in_progress)
2161 ieee80211_wake_queues(hw);
2162
2163 mutex_unlock(&priv->fw_mutex);
2164
2165 return rc;
2166 }
2167
2168 priv->fw_mutex_owner = current;
2169 }
2170
2171 priv->fw_mutex_depth++;
2172
2173 return 0;
2174 }
2175
2176 static void mwl8k_fw_unlock(struct ieee80211_hw *hw)
2177 {
2178 struct mwl8k_priv *priv = hw->priv;
2179
2180 if (!--priv->fw_mutex_depth) {
2181 if (!priv->hw_restart_in_progress)
2182 ieee80211_wake_queues(hw);
2183
2184 priv->fw_mutex_owner = NULL;
2185 mutex_unlock(&priv->fw_mutex);
2186 }
2187 }
2188
2189 static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable,
2190 u32 bitmap);
2191
2192 /*
2193 * Command processing.
2194 */
2195
2196 /* Timeout firmware commands after 10s */
2197 #define MWL8K_CMD_TIMEOUT_MS 10000
2198
2199 static int mwl8k_post_cmd(struct ieee80211_hw *hw, struct mwl8k_cmd_pkt *cmd)
2200 {
2201 DECLARE_COMPLETION_ONSTACK(cmd_wait);
2202 struct mwl8k_priv *priv = hw->priv;
2203 void __iomem *regs = priv->regs;
2204 dma_addr_t dma_addr;
2205 unsigned int dma_size;
2206 int rc;
2207 unsigned long timeout = 0;
2208 u8 buf[32];
2209 u32 bitmap = 0;
2210
2211 wiphy_dbg(hw->wiphy, "Posting %s [%d]\n",
2212 mwl8k_cmd_name(cmd->code, buf, sizeof(buf)), cmd->macid);
2213
2214 /* Before posting firmware commands that could change the hardware
2215 * characteristics, make sure that all BSSes are stopped temporary.
2216 * Enable these stopped BSSes after completion of the commands
2217 */
2218
2219 rc = mwl8k_fw_lock(hw);
2220 if (rc)
2221 return rc;
2222
2223 if (priv->ap_fw && priv->running_bsses) {
2224 switch (le16_to_cpu(cmd->code)) {
2225 case MWL8K_CMD_SET_RF_CHANNEL:
2226 case MWL8K_CMD_RADIO_CONTROL:
2227 case MWL8K_CMD_RF_TX_POWER:
2228 case MWL8K_CMD_TX_POWER:
2229 case MWL8K_CMD_RF_ANTENNA:
2230 case MWL8K_CMD_RTS_THRESHOLD:
2231 case MWL8K_CMD_MIMO_CONFIG:
2232 bitmap = priv->running_bsses;
2233 mwl8k_enable_bsses(hw, false, bitmap);
2234 break;
2235 }
2236 }
2237
2238 cmd->result = (__force __le16) 0xffff;
2239 dma_size = le16_to_cpu(cmd->length);
2240 dma_addr = pci_map_single(priv->pdev, cmd, dma_size,
2241 PCI_DMA_BIDIRECTIONAL);
2242 if (pci_dma_mapping_error(priv->pdev, dma_addr)) {
2243 rc = -ENOMEM;
2244 goto exit;
2245 }
2246
2247 priv->hostcmd_wait = &cmd_wait;
2248 iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
2249 iowrite32(MWL8K_H2A_INT_DOORBELL,
2250 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
2251 iowrite32(MWL8K_H2A_INT_DUMMY,
2252 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
2253
2254 timeout = wait_for_completion_timeout(&cmd_wait,
2255 msecs_to_jiffies(MWL8K_CMD_TIMEOUT_MS));
2256
2257 priv->hostcmd_wait = NULL;
2258
2259
2260 pci_unmap_single(priv->pdev, dma_addr, dma_size,
2261 PCI_DMA_BIDIRECTIONAL);
2262
2263 if (!timeout) {
2264 wiphy_err(hw->wiphy, "Command %s timeout after %u ms\n",
2265 mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
2266 MWL8K_CMD_TIMEOUT_MS);
2267 rc = -ETIMEDOUT;
2268 } else {
2269 int ms;
2270
2271 ms = MWL8K_CMD_TIMEOUT_MS - jiffies_to_msecs(timeout);
2272
2273 rc = cmd->result ? -EINVAL : 0;
2274 if (rc)
2275 wiphy_err(hw->wiphy, "Command %s error 0x%x\n",
2276 mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
2277 le16_to_cpu(cmd->result));
2278 else if (ms > 2000)
2279 wiphy_notice(hw->wiphy, "Command %s took %d ms\n",
2280 mwl8k_cmd_name(cmd->code,
2281 buf, sizeof(buf)),
2282 ms);
2283 }
2284
2285 exit:
2286 if (bitmap)
2287 mwl8k_enable_bsses(hw, true, bitmap);
2288
2289 mwl8k_fw_unlock(hw);
2290
2291 return rc;
2292 }
2293
2294 static int mwl8k_post_pervif_cmd(struct ieee80211_hw *hw,
2295 struct ieee80211_vif *vif,
2296 struct mwl8k_cmd_pkt *cmd)
2297 {
2298 if (vif != NULL)
2299 cmd->macid = MWL8K_VIF(vif)->macid;
2300 return mwl8k_post_cmd(hw, cmd);
2301 }
2302
2303 /*
2304 * Setup code shared between STA and AP firmware images.
2305 */
2306 static void mwl8k_setup_2ghz_band(struct ieee80211_hw *hw)
2307 {
2308 struct mwl8k_priv *priv = hw->priv;
2309
2310 BUILD_BUG_ON(sizeof(priv->channels_24) != sizeof(mwl8k_channels_24));
2311 memcpy(priv->channels_24, mwl8k_channels_24, sizeof(mwl8k_channels_24));
2312
2313 BUILD_BUG_ON(sizeof(priv->rates_24) != sizeof(mwl8k_rates_24));
2314 memcpy(priv->rates_24, mwl8k_rates_24, sizeof(mwl8k_rates_24));
2315
2316 priv->band_24.band = NL80211_BAND_2GHZ;
2317 priv->band_24.channels = priv->channels_24;
2318 priv->band_24.n_channels = ARRAY_SIZE(mwl8k_channels_24);
2319 priv->band_24.bitrates = priv->rates_24;
2320 priv->band_24.n_bitrates = ARRAY_SIZE(mwl8k_rates_24);
2321
2322 hw->wiphy->bands[NL80211_BAND_2GHZ] = &priv->band_24;
2323 }
2324
2325 static void mwl8k_setup_5ghz_band(struct ieee80211_hw *hw)
2326 {
2327 struct mwl8k_priv *priv = hw->priv;
2328
2329 BUILD_BUG_ON(sizeof(priv->channels_50) != sizeof(mwl8k_channels_50));
2330 memcpy(priv->channels_50, mwl8k_channels_50, sizeof(mwl8k_channels_50));
2331
2332 BUILD_BUG_ON(sizeof(priv->rates_50) != sizeof(mwl8k_rates_50));
2333 memcpy(priv->rates_50, mwl8k_rates_50, sizeof(mwl8k_rates_50));
2334
2335 priv->band_50.band = NL80211_BAND_5GHZ;
2336 priv->band_50.channels = priv->channels_50;
2337 priv->band_50.n_channels = ARRAY_SIZE(mwl8k_channels_50);
2338 priv->band_50.bitrates = priv->rates_50;
2339 priv->band_50.n_bitrates = ARRAY_SIZE(mwl8k_rates_50);
2340
2341 hw->wiphy->bands[NL80211_BAND_5GHZ] = &priv->band_50;
2342 }
2343
2344 /*
2345 * CMD_GET_HW_SPEC (STA version).
2346 */
2347 struct mwl8k_cmd_get_hw_spec_sta {
2348 struct mwl8k_cmd_pkt header;
2349 __u8 hw_rev;
2350 __u8 host_interface;
2351 __le16 num_mcaddrs;
2352 __u8 perm_addr[ETH_ALEN];
2353 __le16 region_code;
2354 __le32 fw_rev;
2355 __le32 ps_cookie;
2356 __le32 caps;
2357 __u8 mcs_bitmap[16];
2358 __le32 rx_queue_ptr;
2359 __le32 num_tx_queues;
2360 __le32 tx_queue_ptrs[MWL8K_TX_WMM_QUEUES];
2361 __le32 caps2;
2362 __le32 num_tx_desc_per_queue;
2363 __le32 total_rxd;
2364 } __packed;
2365
2366 #define MWL8K_CAP_MAX_AMSDU 0x20000000
2367 #define MWL8K_CAP_GREENFIELD 0x08000000
2368 #define MWL8K_CAP_AMPDU 0x04000000
2369 #define MWL8K_CAP_RX_STBC 0x01000000
2370 #define MWL8K_CAP_TX_STBC 0x00800000
2371 #define MWL8K_CAP_SHORTGI_40MHZ 0x00400000
2372 #define MWL8K_CAP_SHORTGI_20MHZ 0x00200000
2373 #define MWL8K_CAP_RX_ANTENNA_MASK 0x000e0000
2374 #define MWL8K_CAP_TX_ANTENNA_MASK 0x0001c000
2375 #define MWL8K_CAP_DELAY_BA 0x00003000
2376 #define MWL8K_CAP_MIMO 0x00000200
2377 #define MWL8K_CAP_40MHZ 0x00000100
2378 #define MWL8K_CAP_BAND_MASK 0x00000007
2379 #define MWL8K_CAP_5GHZ 0x00000004
2380 #define MWL8K_CAP_2GHZ4 0x00000001
2381
2382 static void
2383 mwl8k_set_ht_caps(struct ieee80211_hw *hw,
2384 struct ieee80211_supported_band *band, u32 cap)
2385 {
2386 int rx_streams;
2387 int tx_streams;
2388
2389 band->ht_cap.ht_supported = 1;
2390
2391 if (cap & MWL8K_CAP_MAX_AMSDU)
2392 band->ht_cap.cap |= IEEE80211_HT_CAP_MAX_AMSDU;
2393 if (cap & MWL8K_CAP_GREENFIELD)
2394 band->ht_cap.cap |= IEEE80211_HT_CAP_GRN_FLD;
2395 if (cap & MWL8K_CAP_AMPDU) {
2396 ieee80211_hw_set(hw, AMPDU_AGGREGATION);
2397 band->ht_cap.ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
2398 band->ht_cap.ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE;
2399 }
2400 if (cap & MWL8K_CAP_RX_STBC)
2401 band->ht_cap.cap |= IEEE80211_HT_CAP_RX_STBC;
2402 if (cap & MWL8K_CAP_TX_STBC)
2403 band->ht_cap.cap |= IEEE80211_HT_CAP_TX_STBC;
2404 if (cap & MWL8K_CAP_SHORTGI_40MHZ)
2405 band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_40;
2406 if (cap & MWL8K_CAP_SHORTGI_20MHZ)
2407 band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_20;
2408 if (cap & MWL8K_CAP_DELAY_BA)
2409 band->ht_cap.cap |= IEEE80211_HT_CAP_DELAY_BA;
2410 if (cap & MWL8K_CAP_40MHZ)
2411 band->ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2412
2413 rx_streams = hweight32(cap & MWL8K_CAP_RX_ANTENNA_MASK);
2414 tx_streams = hweight32(cap & MWL8K_CAP_TX_ANTENNA_MASK);
2415
2416 band->ht_cap.mcs.rx_mask[0] = 0xff;
2417 if (rx_streams >= 2)
2418 band->ht_cap.mcs.rx_mask[1] = 0xff;
2419 if (rx_streams >= 3)
2420 band->ht_cap.mcs.rx_mask[2] = 0xff;
2421 band->ht_cap.mcs.rx_mask[4] = 0x01;
2422 band->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
2423
2424 if (rx_streams != tx_streams) {
2425 band->ht_cap.mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
2426 band->ht_cap.mcs.tx_params |= (tx_streams - 1) <<
2427 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2428 }
2429 }
2430
2431 static void
2432 mwl8k_set_caps(struct ieee80211_hw *hw, u32 caps)
2433 {
2434 struct mwl8k_priv *priv = hw->priv;
2435
2436 if (priv->caps)
2437 return;
2438
2439 if ((caps & MWL8K_CAP_2GHZ4) || !(caps & MWL8K_CAP_BAND_MASK)) {
2440 mwl8k_setup_2ghz_band(hw);
2441 if (caps & MWL8K_CAP_MIMO)
2442 mwl8k_set_ht_caps(hw, &priv->band_24, caps);
2443 }
2444
2445 if (caps & MWL8K_CAP_5GHZ) {
2446 mwl8k_setup_5ghz_band(hw);
2447 if (caps & MWL8K_CAP_MIMO)
2448 mwl8k_set_ht_caps(hw, &priv->band_50, caps);
2449 }
2450
2451 priv->caps = caps;
2452 }
2453
2454 static int mwl8k_cmd_get_hw_spec_sta(struct ieee80211_hw *hw)
2455 {
2456 struct mwl8k_priv *priv = hw->priv;
2457 struct mwl8k_cmd_get_hw_spec_sta *cmd;
2458 int rc;
2459 int i;
2460
2461 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2462 if (cmd == NULL)
2463 return -ENOMEM;
2464
2465 cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
2466 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2467
2468 memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
2469 cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2470 cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma);
2471 cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv));
2472 for (i = 0; i < mwl8k_tx_queues(priv); i++)
2473 cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[i].txd_dma);
2474 cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
2475 cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS);
2476
2477 rc = mwl8k_post_cmd(hw, &cmd->header);
2478
2479 if (!rc) {
2480 SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
2481 priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
2482 priv->fw_rev = le32_to_cpu(cmd->fw_rev);
2483 priv->hw_rev = cmd->hw_rev;
2484 mwl8k_set_caps(hw, le32_to_cpu(cmd->caps));
2485 priv->ap_macids_supported = 0x00000000;
2486 priv->sta_macids_supported = 0x00000001;
2487 }
2488
2489 kfree(cmd);
2490 return rc;
2491 }
2492
2493 /*
2494 * CMD_GET_HW_SPEC (AP version).
2495 */
2496 struct mwl8k_cmd_get_hw_spec_ap {
2497 struct mwl8k_cmd_pkt header;
2498 __u8 hw_rev;
2499 __u8 host_interface;
2500 __le16 num_wcb;
2501 __le16 num_mcaddrs;
2502 __u8 perm_addr[ETH_ALEN];
2503 __le16 region_code;
2504 __le16 num_antenna;
2505 __le32 fw_rev;
2506 __le32 wcbbase0;
2507 __le32 rxwrptr;
2508 __le32 rxrdptr;
2509 __le32 ps_cookie;
2510 __le32 wcbbase1;
2511 __le32 wcbbase2;
2512 __le32 wcbbase3;
2513 __le32 fw_api_version;
2514 __le32 caps;
2515 __le32 num_of_ampdu_queues;
2516 __le32 wcbbase_ampdu[MWL8K_MAX_AMPDU_QUEUES];
2517 } __packed;
2518
2519 static int mwl8k_cmd_get_hw_spec_ap(struct ieee80211_hw *hw)
2520 {
2521 struct mwl8k_priv *priv = hw->priv;
2522 struct mwl8k_cmd_get_hw_spec_ap *cmd;
2523 int rc, i;
2524 u32 api_version;
2525
2526 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2527 if (cmd == NULL)
2528 return -ENOMEM;
2529
2530 cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
2531 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2532
2533 memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
2534 cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2535
2536 rc = mwl8k_post_cmd(hw, &cmd->header);
2537
2538 if (!rc) {
2539 int off;
2540
2541 api_version = le32_to_cpu(cmd->fw_api_version);
2542 if (priv->device_info->fw_api_ap != api_version) {
2543 printk(KERN_ERR "%s: Unsupported fw API version for %s."
2544 " Expected %d got %d.\n", MWL8K_NAME,
2545 priv->device_info->part_name,
2546 priv->device_info->fw_api_ap,
2547 api_version);
2548 rc = -EINVAL;
2549 goto done;
2550 }
2551 SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
2552 priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
2553 priv->fw_rev = le32_to_cpu(cmd->fw_rev);
2554 priv->hw_rev = cmd->hw_rev;
2555 mwl8k_set_caps(hw, le32_to_cpu(cmd->caps));
2556 priv->ap_macids_supported = 0x000000ff;
2557 priv->sta_macids_supported = 0x00000100;
2558 priv->num_ampdu_queues = le32_to_cpu(cmd->num_of_ampdu_queues);
2559 if (priv->num_ampdu_queues > MWL8K_MAX_AMPDU_QUEUES) {
2560 wiphy_warn(hw->wiphy, "fw reported %d ampdu queues"
2561 " but we only support %d.\n",
2562 priv->num_ampdu_queues,
2563 MWL8K_MAX_AMPDU_QUEUES);
2564 priv->num_ampdu_queues = MWL8K_MAX_AMPDU_QUEUES;
2565 }
2566 off = le32_to_cpu(cmd->rxwrptr) & 0xffff;
2567 iowrite32(priv->rxq[0].rxd_dma, priv->sram + off);
2568
2569 off = le32_to_cpu(cmd->rxrdptr) & 0xffff;
2570 iowrite32(priv->rxq[0].rxd_dma, priv->sram + off);
2571
2572 priv->txq_offset[0] = le32_to_cpu(cmd->wcbbase0) & 0xffff;
2573 priv->txq_offset[1] = le32_to_cpu(cmd->wcbbase1) & 0xffff;
2574 priv->txq_offset[2] = le32_to_cpu(cmd->wcbbase2) & 0xffff;
2575 priv->txq_offset[3] = le32_to_cpu(cmd->wcbbase3) & 0xffff;
2576
2577 for (i = 0; i < priv->num_ampdu_queues; i++)
2578 priv->txq_offset[i + MWL8K_TX_WMM_QUEUES] =
2579 le32_to_cpu(cmd->wcbbase_ampdu[i]) & 0xffff;
2580 }
2581
2582 done:
2583 kfree(cmd);
2584 return rc;
2585 }
2586
2587 /*
2588 * CMD_SET_HW_SPEC.
2589 */
2590 struct mwl8k_cmd_set_hw_spec {
2591 struct mwl8k_cmd_pkt header;
2592 __u8 hw_rev;
2593 __u8 host_interface;
2594 __le16 num_mcaddrs;
2595 __u8 perm_addr[ETH_ALEN];
2596 __le16 region_code;
2597 __le32 fw_rev;
2598 __le32 ps_cookie;
2599 __le32 caps;
2600 __le32 rx_queue_ptr;
2601 __le32 num_tx_queues;
2602 __le32 tx_queue_ptrs[MWL8K_MAX_TX_QUEUES];
2603 __le32 flags;
2604 __le32 num_tx_desc_per_queue;
2605 __le32 total_rxd;
2606 } __packed;
2607
2608 /* If enabled, MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY will cause
2609 * packets to expire 500 ms after the timestamp in the tx descriptor. That is,
2610 * the packets that are queued for more than 500ms, will be dropped in the
2611 * hardware. This helps minimizing the issues caused due to head-of-line
2612 * blocking where a slow client can hog the bandwidth and affect traffic to a
2613 * faster client.
2614 */
2615 #define MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY 0x00000400
2616 #define MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR 0x00000200
2617 #define MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT 0x00000080
2618 #define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP 0x00000020
2619 #define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON 0x00000010
2620
2621 static int mwl8k_cmd_set_hw_spec(struct ieee80211_hw *hw)
2622 {
2623 struct mwl8k_priv *priv = hw->priv;
2624 struct mwl8k_cmd_set_hw_spec *cmd;
2625 int rc;
2626 int i;
2627
2628 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2629 if (cmd == NULL)
2630 return -ENOMEM;
2631
2632 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_HW_SPEC);
2633 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2634
2635 cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2636 cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma);
2637 cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv));
2638
2639 /*
2640 * Mac80211 stack has Q0 as highest priority and Q3 as lowest in
2641 * that order. Firmware has Q3 as highest priority and Q0 as lowest
2642 * in that order. Map Q3 of mac80211 to Q0 of firmware so that the
2643 * priority is interpreted the right way in firmware.
2644 */
2645 for (i = 0; i < mwl8k_tx_queues(priv); i++) {
2646 int j = mwl8k_tx_queues(priv) - 1 - i;
2647 cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[j].txd_dma);
2648 }
2649
2650 cmd->flags = cpu_to_le32(MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT |
2651 MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP |
2652 MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON |
2653 MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY |
2654 MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR);
2655 cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
2656 cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS);
2657
2658 rc = mwl8k_post_cmd(hw, &cmd->header);
2659 kfree(cmd);
2660
2661 return rc;
2662 }
2663
2664 /*
2665 * CMD_MAC_MULTICAST_ADR.
2666 */
2667 struct mwl8k_cmd_mac_multicast_adr {
2668 struct mwl8k_cmd_pkt header;
2669 __le16 action;
2670 __le16 numaddr;
2671 __u8 addr[0][ETH_ALEN];
2672 };
2673
2674 #define MWL8K_ENABLE_RX_DIRECTED 0x0001
2675 #define MWL8K_ENABLE_RX_MULTICAST 0x0002
2676 #define MWL8K_ENABLE_RX_ALL_MULTICAST 0x0004
2677 #define MWL8K_ENABLE_RX_BROADCAST 0x0008
2678
2679 static struct mwl8k_cmd_pkt *
2680 __mwl8k_cmd_mac_multicast_adr(struct ieee80211_hw *hw, int allmulti,
2681 struct netdev_hw_addr_list *mc_list)
2682 {
2683 struct mwl8k_priv *priv = hw->priv;
2684 struct mwl8k_cmd_mac_multicast_adr *cmd;
2685 int size;
2686 int mc_count = 0;
2687
2688 if (mc_list)
2689 mc_count = netdev_hw_addr_list_count(mc_list);
2690
2691 if (allmulti || mc_count > priv->num_mcaddrs) {
2692 allmulti = 1;
2693 mc_count = 0;
2694 }
2695
2696 size = sizeof(*cmd) + mc_count * ETH_ALEN;
2697
2698 cmd = kzalloc(size, GFP_ATOMIC);
2699 if (cmd == NULL)
2700 return NULL;
2701
2702 cmd->header.code = cpu_to_le16(MWL8K_CMD_MAC_MULTICAST_ADR);
2703 cmd->header.length = cpu_to_le16(size);
2704 cmd->action = cpu_to_le16(MWL8K_ENABLE_RX_DIRECTED |
2705 MWL8K_ENABLE_RX_BROADCAST);
2706
2707 if (allmulti) {
2708 cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_ALL_MULTICAST);
2709 } else if (mc_count) {
2710 struct netdev_hw_addr *ha;
2711 int i = 0;
2712
2713 cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_MULTICAST);
2714 cmd->numaddr = cpu_to_le16(mc_count);
2715 netdev_hw_addr_list_for_each(ha, mc_list) {
2716 memcpy(cmd->addr[i], ha->addr, ETH_ALEN);
2717 }
2718 }
2719
2720 return &cmd->header;
2721 }
2722
2723 /*
2724 * CMD_GET_STAT.
2725 */
2726 struct mwl8k_cmd_get_stat {
2727 struct mwl8k_cmd_pkt header;
2728 __le32 stats[64];
2729 } __packed;
2730
2731 #define MWL8K_STAT_ACK_FAILURE 9
2732 #define MWL8K_STAT_RTS_FAILURE 12
2733 #define MWL8K_STAT_FCS_ERROR 24
2734 #define MWL8K_STAT_RTS_SUCCESS 11
2735
2736 static int mwl8k_cmd_get_stat(struct ieee80211_hw *hw,
2737 struct ieee80211_low_level_stats *stats)
2738 {
2739 struct mwl8k_cmd_get_stat *cmd;
2740 int rc;
2741
2742 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2743 if (cmd == NULL)
2744 return -ENOMEM;
2745
2746 cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_STAT);
2747 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2748
2749 rc = mwl8k_post_cmd(hw, &cmd->header);
2750 if (!rc) {
2751 stats->dot11ACKFailureCount =
2752 le32_to_cpu(cmd->stats[MWL8K_STAT_ACK_FAILURE]);
2753 stats->dot11RTSFailureCount =
2754 le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_FAILURE]);
2755 stats->dot11FCSErrorCount =
2756 le32_to_cpu(cmd->stats[MWL8K_STAT_FCS_ERROR]);
2757 stats->dot11RTSSuccessCount =
2758 le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_SUCCESS]);
2759 }
2760 kfree(cmd);
2761
2762 return rc;
2763 }
2764
2765 /*
2766 * CMD_RADIO_CONTROL.
2767 */
2768 struct mwl8k_cmd_radio_control {
2769 struct mwl8k_cmd_pkt header;
2770 __le16 action;
2771 __le16 control;
2772 __le16 radio_on;
2773 } __packed;
2774
2775 static int
2776 mwl8k_cmd_radio_control(struct ieee80211_hw *hw, bool enable, bool force)
2777 {
2778 struct mwl8k_priv *priv = hw->priv;
2779 struct mwl8k_cmd_radio_control *cmd;
2780 int rc;
2781
2782 if (enable == priv->radio_on && !force)
2783 return 0;
2784
2785 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2786 if (cmd == NULL)
2787 return -ENOMEM;
2788
2789 cmd->header.code = cpu_to_le16(MWL8K_CMD_RADIO_CONTROL);
2790 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2791 cmd->action = cpu_to_le16(MWL8K_CMD_SET);
2792 cmd->control = cpu_to_le16(priv->radio_short_preamble ? 3 : 1);
2793 cmd->radio_on = cpu_to_le16(enable ? 0x0001 : 0x0000);
2794
2795 rc = mwl8k_post_cmd(hw, &cmd->header);
2796 kfree(cmd);
2797
2798 if (!rc)
2799 priv->radio_on = enable;
2800
2801 return rc;
2802 }
2803
2804 static int mwl8k_cmd_radio_disable(struct ieee80211_hw *hw)
2805 {
2806 return mwl8k_cmd_radio_control(hw, 0, 0);
2807 }
2808
2809 static int mwl8k_cmd_radio_enable(struct ieee80211_hw *hw)
2810 {
2811 return mwl8k_cmd_radio_control(hw, 1, 0);
2812 }
2813
2814 static int
2815 mwl8k_set_radio_preamble(struct ieee80211_hw *hw, bool short_preamble)
2816 {
2817 struct mwl8k_priv *priv = hw->priv;
2818
2819 priv->radio_short_preamble = short_preamble;
2820
2821 return mwl8k_cmd_radio_control(hw, 1, 1);
2822 }
2823
2824 /*
2825 * CMD_RF_TX_POWER.
2826 */
2827 #define MWL8K_RF_TX_POWER_LEVEL_TOTAL 8
2828
2829 struct mwl8k_cmd_rf_tx_power {
2830 struct mwl8k_cmd_pkt header;
2831 __le16 action;
2832 __le16 support_level;
2833 __le16 current_level;
2834 __le16 reserved;
2835 __le16 power_level_list[MWL8K_RF_TX_POWER_LEVEL_TOTAL];
2836 } __packed;
2837
2838 static int mwl8k_cmd_rf_tx_power(struct ieee80211_hw *hw, int dBm)
2839 {
2840 struct mwl8k_cmd_rf_tx_power *cmd;
2841 int rc;
2842
2843 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2844 if (cmd == NULL)
2845 return -ENOMEM;
2846
2847 cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_TX_POWER);
2848 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2849 cmd->action = cpu_to_le16(MWL8K_CMD_SET);
2850 cmd->support_level = cpu_to_le16(dBm);
2851
2852 rc = mwl8k_post_cmd(hw, &cmd->header);
2853 kfree(cmd);
2854
2855 return rc;
2856 }
2857
2858 /*
2859 * CMD_TX_POWER.
2860 */
2861 #define MWL8K_TX_POWER_LEVEL_TOTAL 12
2862
2863 struct mwl8k_cmd_tx_power {
2864 struct mwl8k_cmd_pkt header;
2865 __le16 action;
2866 __le16 band;
2867 __le16 channel;
2868 __le16 bw;
2869 __le16 sub_ch;
2870 __le16 power_level_list[MWL8K_TX_POWER_LEVEL_TOTAL];
2871 } __packed;
2872
2873 static int mwl8k_cmd_tx_power(struct ieee80211_hw *hw,
2874 struct ieee80211_conf *conf,
2875 unsigned short pwr)
2876 {
2877 struct ieee80211_channel *channel = conf->chandef.chan;
2878 enum nl80211_channel_type channel_type =
2879 cfg80211_get_chandef_type(&conf->chandef);
2880 struct mwl8k_cmd_tx_power *cmd;
2881 int rc;
2882 int i;
2883
2884 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2885 if (cmd == NULL)
2886 return -ENOMEM;
2887
2888 cmd->header.code = cpu_to_le16(MWL8K_CMD_TX_POWER);
2889 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2890 cmd->action = cpu_to_le16(MWL8K_CMD_SET_LIST);
2891
2892 if (channel->band == NL80211_BAND_2GHZ)
2893 cmd->band = cpu_to_le16(0x1);
2894 else if (channel->band == NL80211_BAND_5GHZ)
2895 cmd->band = cpu_to_le16(0x4);
2896
2897 cmd->channel = cpu_to_le16(channel->hw_value);
2898
2899 if (channel_type == NL80211_CHAN_NO_HT ||
2900 channel_type == NL80211_CHAN_HT20) {
2901 cmd->bw = cpu_to_le16(0x2);
2902 } else {
2903 cmd->bw = cpu_to_le16(0x4);
2904 if (channel_type == NL80211_CHAN_HT40MINUS)
2905 cmd->sub_ch = cpu_to_le16(0x3);
2906 else if (channel_type == NL80211_CHAN_HT40PLUS)
2907 cmd->sub_ch = cpu_to_le16(0x1);
2908 }
2909
2910 for (i = 0; i < MWL8K_TX_POWER_LEVEL_TOTAL; i++)
2911 cmd->power_level_list[i] = cpu_to_le16(pwr);
2912
2913 rc = mwl8k_post_cmd(hw, &cmd->header);
2914 kfree(cmd);
2915
2916 return rc;
2917 }
2918
2919 /*
2920 * CMD_RF_ANTENNA.
2921 */
2922 struct mwl8k_cmd_rf_antenna {
2923 struct mwl8k_cmd_pkt header;
2924 __le16 antenna;
2925 __le16 mode;
2926 } __packed;
2927
2928 #define MWL8K_RF_ANTENNA_RX 1
2929 #define MWL8K_RF_ANTENNA_TX 2
2930
2931 static int
2932 mwl8k_cmd_rf_antenna(struct ieee80211_hw *hw, int antenna, int mask)
2933 {
2934 struct mwl8k_cmd_rf_antenna *cmd;
2935 int rc;
2936
2937 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2938 if (cmd == NULL)
2939 return -ENOMEM;
2940
2941 cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_ANTENNA);
2942 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2943 cmd->antenna = cpu_to_le16(antenna);
2944 cmd->mode = cpu_to_le16(mask);
2945
2946 rc = mwl8k_post_cmd(hw, &cmd->header);
2947 kfree(cmd);
2948
2949 return rc;
2950 }
2951
2952 /*
2953 * CMD_SET_BEACON.
2954 */
2955 struct mwl8k_cmd_set_beacon {
2956 struct mwl8k_cmd_pkt header;
2957 __le16 beacon_len;
2958 __u8 beacon[];
2959 };
2960
2961 static int mwl8k_cmd_set_beacon(struct ieee80211_hw *hw,
2962 struct ieee80211_vif *vif, u8 *beacon, int len)
2963 {
2964 struct mwl8k_cmd_set_beacon *cmd;
2965 int rc;
2966
2967 cmd = kzalloc(sizeof(*cmd) + len, GFP_KERNEL);
2968 if (cmd == NULL)
2969 return -ENOMEM;
2970
2971 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_BEACON);
2972 cmd->header.length = cpu_to_le16(sizeof(*cmd) + len);
2973 cmd->beacon_len = cpu_to_le16(len);
2974 memcpy(cmd->beacon, beacon, len);
2975
2976 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
2977 kfree(cmd);
2978
2979 return rc;
2980 }
2981
2982 /*
2983 * CMD_SET_PRE_SCAN.
2984 */
2985 struct mwl8k_cmd_set_pre_scan {
2986 struct mwl8k_cmd_pkt header;
2987 } __packed;
2988
2989 static int mwl8k_cmd_set_pre_scan(struct ieee80211_hw *hw)
2990 {
2991 struct mwl8k_cmd_set_pre_scan *cmd;
2992 int rc;
2993
2994 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2995 if (cmd == NULL)
2996 return -ENOMEM;
2997
2998 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_PRE_SCAN);
2999 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3000
3001 rc = mwl8k_post_cmd(hw, &cmd->header);
3002 kfree(cmd);
3003
3004 return rc;
3005 }
3006
3007 /*
3008 * CMD_BBP_REG_ACCESS.
3009 */
3010 struct mwl8k_cmd_bbp_reg_access {
3011 struct mwl8k_cmd_pkt header;
3012 __le16 action;
3013 __le16 offset;
3014 u8 value;
3015 u8 rsrv[3];
3016 } __packed;
3017
3018 static int
3019 mwl8k_cmd_bbp_reg_access(struct ieee80211_hw *hw,
3020 u16 action,
3021 u16 offset,
3022 u8 *value)
3023 {
3024 struct mwl8k_cmd_bbp_reg_access *cmd;
3025 int rc;
3026
3027 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3028 if (cmd == NULL)
3029 return -ENOMEM;
3030
3031 cmd->header.code = cpu_to_le16(MWL8K_CMD_BBP_REG_ACCESS);
3032 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3033 cmd->action = cpu_to_le16(action);
3034 cmd->offset = cpu_to_le16(offset);
3035
3036 rc = mwl8k_post_cmd(hw, &cmd->header);
3037
3038 if (!rc)
3039 *value = cmd->value;
3040 else
3041 *value = 0;
3042
3043 kfree(cmd);
3044
3045 return rc;
3046 }
3047
3048 /*
3049 * CMD_SET_POST_SCAN.
3050 */
3051 struct mwl8k_cmd_set_post_scan {
3052 struct mwl8k_cmd_pkt header;
3053 __le32 isibss;
3054 __u8 bssid[ETH_ALEN];
3055 } __packed;
3056
3057 static int
3058 mwl8k_cmd_set_post_scan(struct ieee80211_hw *hw, const __u8 *mac)
3059 {
3060 struct mwl8k_cmd_set_post_scan *cmd;
3061 int rc;
3062
3063 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3064 if (cmd == NULL)
3065 return -ENOMEM;
3066
3067 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_POST_SCAN);
3068 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3069 cmd->isibss = 0;
3070 memcpy(cmd->bssid, mac, ETH_ALEN);
3071
3072 rc = mwl8k_post_cmd(hw, &cmd->header);
3073 kfree(cmd);
3074
3075 return rc;
3076 }
3077
3078 static int freq_to_idx(struct mwl8k_priv *priv, int freq)
3079 {
3080 struct ieee80211_supported_band *sband;
3081 int band, ch, idx = 0;
3082
3083 for (band = NL80211_BAND_2GHZ; band < NUM_NL80211_BANDS; band++) {
3084 sband = priv->hw->wiphy->bands[band];
3085 if (!sband)
3086 continue;
3087
3088 for (ch = 0; ch < sband->n_channels; ch++, idx++)
3089 if (sband->channels[ch].center_freq == freq)
3090 goto exit;
3091 }
3092
3093 exit:
3094 return idx;
3095 }
3096
3097 static void mwl8k_update_survey(struct mwl8k_priv *priv,
3098 struct ieee80211_channel *channel)
3099 {
3100 u32 cca_cnt, rx_rdy;
3101 s8 nf = 0, idx;
3102 struct survey_info *survey;
3103
3104 idx = freq_to_idx(priv, priv->acs_chan->center_freq);
3105 if (idx >= MWL8K_NUM_CHANS) {
3106 wiphy_err(priv->hw->wiphy, "Failed to update survey\n");
3107 return;
3108 }
3109
3110 survey = &priv->survey[idx];
3111
3112 cca_cnt = ioread32(priv->regs + NOK_CCA_CNT_REG);
3113 cca_cnt /= 1000; /* uSecs to mSecs */
3114 survey->time_busy = (u64) cca_cnt;
3115
3116 rx_rdy = ioread32(priv->regs + BBU_RXRDY_CNT_REG);
3117 rx_rdy /= 1000; /* uSecs to mSecs */
3118 survey->time_rx = (u64) rx_rdy;
3119
3120 priv->channel_time = jiffies - priv->channel_time;
3121 survey->time = jiffies_to_msecs(priv->channel_time);
3122
3123 survey->channel = channel;
3124
3125 mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &nf);
3126
3127 /* Make sure sign is negative else ACS at hostapd fails */
3128 survey->noise = nf * -1;
3129
3130 survey->filled = SURVEY_INFO_NOISE_DBM |
3131 SURVEY_INFO_TIME |
3132 SURVEY_INFO_TIME_BUSY |
3133 SURVEY_INFO_TIME_RX;
3134 }
3135
3136 /*
3137 * CMD_SET_RF_CHANNEL.
3138 */
3139 struct mwl8k_cmd_set_rf_channel {
3140 struct mwl8k_cmd_pkt header;
3141 __le16 action;
3142 __u8 current_channel;
3143 __le32 channel_flags;
3144 } __packed;
3145
3146 static int mwl8k_cmd_set_rf_channel(struct ieee80211_hw *hw,
3147 struct ieee80211_conf *conf)
3148 {
3149 struct ieee80211_channel *channel = conf->chandef.chan;
3150 enum nl80211_channel_type channel_type =
3151 cfg80211_get_chandef_type(&conf->chandef);
3152 struct mwl8k_cmd_set_rf_channel *cmd;
3153 struct mwl8k_priv *priv = hw->priv;
3154 int rc;
3155
3156 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3157 if (cmd == NULL)
3158 return -ENOMEM;
3159
3160 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RF_CHANNEL);
3161 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3162 cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3163 cmd->current_channel = channel->hw_value;
3164
3165 if (channel->band == NL80211_BAND_2GHZ)
3166 cmd->channel_flags |= cpu_to_le32(0x00000001);
3167 else if (channel->band == NL80211_BAND_5GHZ)
3168 cmd->channel_flags |= cpu_to_le32(0x00000004);
3169
3170 if (!priv->sw_scan_start) {
3171 if (channel_type == NL80211_CHAN_NO_HT ||
3172 channel_type == NL80211_CHAN_HT20)
3173 cmd->channel_flags |= cpu_to_le32(0x00000080);
3174 else if (channel_type == NL80211_CHAN_HT40MINUS)
3175 cmd->channel_flags |= cpu_to_le32(0x000001900);
3176 else if (channel_type == NL80211_CHAN_HT40PLUS)
3177 cmd->channel_flags |= cpu_to_le32(0x000000900);
3178 } else {
3179 cmd->channel_flags |= cpu_to_le32(0x00000080);
3180 }
3181
3182 if (priv->sw_scan_start) {
3183 /* Store current channel stats
3184 * before switching to newer one.
3185 * This will be processed only for AP fw.
3186 */
3187 if (priv->channel_time != 0)
3188 mwl8k_update_survey(priv, priv->acs_chan);
3189
3190 priv->channel_time = jiffies;
3191 priv->acs_chan = channel;
3192 }
3193
3194 rc = mwl8k_post_cmd(hw, &cmd->header);
3195 kfree(cmd);
3196
3197 return rc;
3198 }
3199
3200 /*
3201 * CMD_SET_AID.
3202 */
3203 #define MWL8K_FRAME_PROT_DISABLED 0x00
3204 #define MWL8K_FRAME_PROT_11G 0x07
3205 #define MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY 0x02
3206 #define MWL8K_FRAME_PROT_11N_HT_ALL 0x06
3207
3208 struct mwl8k_cmd_update_set_aid {
3209 struct mwl8k_cmd_pkt header;
3210 __le16 aid;
3211
3212 /* AP's MAC address (BSSID) */
3213 __u8 bssid[ETH_ALEN];
3214 __le16 protection_mode;
3215 __u8 supp_rates[14];
3216 } __packed;
3217
3218 static void legacy_rate_mask_to_array(u8 *rates, u32 mask)
3219 {
3220 int i;
3221 int j;
3222
3223 /*
3224 * Clear nonstandard rate 4.
3225 */
3226 mask &= 0x1fef;
3227
3228 for (i = 0, j = 0; i < 13; i++) {
3229 if (mask & (1 << i))
3230 rates[j++] = mwl8k_rates_24[i].hw_value;
3231 }
3232 }
3233
3234 static int
3235 mwl8k_cmd_set_aid(struct ieee80211_hw *hw,
3236 struct ieee80211_vif *vif, u32 legacy_rate_mask)
3237 {
3238 struct mwl8k_cmd_update_set_aid *cmd;
3239 u16 prot_mode;
3240 int rc;
3241
3242 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3243 if (cmd == NULL)
3244 return -ENOMEM;
3245
3246 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_AID);
3247 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3248 cmd->aid = cpu_to_le16(vif->bss_conf.aid);
3249 memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
3250
3251 if (vif->bss_conf.use_cts_prot) {
3252 prot_mode = MWL8K_FRAME_PROT_11G;
3253 } else {
3254 switch (vif->bss_conf.ht_operation_mode &
3255 IEEE80211_HT_OP_MODE_PROTECTION) {
3256 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
3257 prot_mode = MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY;
3258 break;
3259 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
3260 prot_mode = MWL8K_FRAME_PROT_11N_HT_ALL;
3261 break;
3262 default:
3263 prot_mode = MWL8K_FRAME_PROT_DISABLED;
3264 break;
3265 }
3266 }
3267 cmd->protection_mode = cpu_to_le16(prot_mode);
3268
3269 legacy_rate_mask_to_array(cmd->supp_rates, legacy_rate_mask);
3270
3271 rc = mwl8k_post_cmd(hw, &cmd->header);
3272 kfree(cmd);
3273
3274 return rc;
3275 }
3276
3277 /*
3278 * CMD_SET_RATE.
3279 */
3280 struct mwl8k_cmd_set_rate {
3281 struct mwl8k_cmd_pkt header;
3282 __u8 legacy_rates[14];
3283
3284 /* Bitmap for supported MCS codes. */
3285 __u8 mcs_set[16];
3286 __u8 reserved[16];
3287 } __packed;
3288
3289 static int
3290 mwl8k_cmd_set_rate(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
3291 u32 legacy_rate_mask, u8 *mcs_rates)
3292 {
3293 struct mwl8k_cmd_set_rate *cmd;
3294 int rc;
3295
3296 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3297 if (cmd == NULL)
3298 return -ENOMEM;
3299
3300 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATE);
3301 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3302 legacy_rate_mask_to_array(cmd->legacy_rates, legacy_rate_mask);
3303 memcpy(cmd->mcs_set, mcs_rates, 16);
3304
3305 rc = mwl8k_post_cmd(hw, &cmd->header);
3306 kfree(cmd);
3307
3308 return rc;
3309 }
3310
3311 /*
3312 * CMD_FINALIZE_JOIN.
3313 */
3314 #define MWL8K_FJ_BEACON_MAXLEN 128
3315
3316 struct mwl8k_cmd_finalize_join {
3317 struct mwl8k_cmd_pkt header;
3318 __le32 sleep_interval; /* Number of beacon periods to sleep */
3319 __u8 beacon_data[MWL8K_FJ_BEACON_MAXLEN];
3320 } __packed;
3321
3322 static int mwl8k_cmd_finalize_join(struct ieee80211_hw *hw, void *frame,
3323 int framelen, int dtim)
3324 {
3325 struct mwl8k_cmd_finalize_join *cmd;
3326 struct ieee80211_mgmt *payload = frame;
3327 int payload_len;
3328 int rc;
3329
3330 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3331 if (cmd == NULL)
3332 return -ENOMEM;
3333
3334 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_FINALIZE_JOIN);
3335 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3336 cmd->sleep_interval = cpu_to_le32(dtim ? dtim : 1);
3337
3338 payload_len = framelen - ieee80211_hdrlen(payload->frame_control);
3339 if (payload_len < 0)
3340 payload_len = 0;
3341 else if (payload_len > MWL8K_FJ_BEACON_MAXLEN)
3342 payload_len = MWL8K_FJ_BEACON_MAXLEN;
3343
3344 memcpy(cmd->beacon_data, &payload->u.beacon, payload_len);
3345
3346 rc = mwl8k_post_cmd(hw, &cmd->header);
3347 kfree(cmd);
3348
3349 return rc;
3350 }
3351
3352 /*
3353 * CMD_SET_RTS_THRESHOLD.
3354 */
3355 struct mwl8k_cmd_set_rts_threshold {
3356 struct mwl8k_cmd_pkt header;
3357 __le16 action;
3358 __le16 threshold;
3359 } __packed;
3360
3361 static int
3362 mwl8k_cmd_set_rts_threshold(struct ieee80211_hw *hw, int rts_thresh)
3363 {
3364 struct mwl8k_cmd_set_rts_threshold *cmd;
3365 int rc;
3366
3367 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3368 if (cmd == NULL)
3369 return -ENOMEM;
3370
3371 cmd->header.code = cpu_to_le16(MWL8K_CMD_RTS_THRESHOLD);
3372 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3373 cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3374 cmd->threshold = cpu_to_le16(rts_thresh);
3375
3376 rc = mwl8k_post_cmd(hw, &cmd->header);
3377 kfree(cmd);
3378
3379 return rc;
3380 }
3381
3382 /*
3383 * CMD_SET_SLOT.
3384 */
3385 struct mwl8k_cmd_set_slot {
3386 struct mwl8k_cmd_pkt header;
3387 __le16 action;
3388 __u8 short_slot;
3389 } __packed;
3390
3391 static int mwl8k_cmd_set_slot(struct ieee80211_hw *hw, bool short_slot_time)
3392 {
3393 struct mwl8k_cmd_set_slot *cmd;
3394 int rc;
3395
3396 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3397 if (cmd == NULL)
3398 return -ENOMEM;
3399
3400 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_SLOT);
3401 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3402 cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3403 cmd->short_slot = short_slot_time;
3404
3405 rc = mwl8k_post_cmd(hw, &cmd->header);
3406 kfree(cmd);
3407
3408 return rc;
3409 }
3410
3411 /*
3412 * CMD_SET_EDCA_PARAMS.
3413 */
3414 struct mwl8k_cmd_set_edca_params {
3415 struct mwl8k_cmd_pkt header;
3416
3417 /* See MWL8K_SET_EDCA_XXX below */
3418 __le16 action;
3419
3420 /* TX opportunity in units of 32 us */
3421 __le16 txop;
3422
3423 union {
3424 struct {
3425 /* Log exponent of max contention period: 0...15 */
3426 __le32 log_cw_max;
3427
3428 /* Log exponent of min contention period: 0...15 */
3429 __le32 log_cw_min;
3430
3431 /* Adaptive interframe spacing in units of 32us */
3432 __u8 aifs;
3433
3434 /* TX queue to configure */
3435 __u8 txq;
3436 } ap;
3437 struct {
3438 /* Log exponent of max contention period: 0...15 */
3439 __u8 log_cw_max;
3440
3441 /* Log exponent of min contention period: 0...15 */
3442 __u8 log_cw_min;
3443
3444 /* Adaptive interframe spacing in units of 32us */
3445 __u8 aifs;
3446
3447 /* TX queue to configure */
3448 __u8 txq;
3449 } sta;
3450 };
3451 } __packed;
3452
3453 #define MWL8K_SET_EDCA_CW 0x01
3454 #define MWL8K_SET_EDCA_TXOP 0x02
3455 #define MWL8K_SET_EDCA_AIFS 0x04
3456
3457 #define MWL8K_SET_EDCA_ALL (MWL8K_SET_EDCA_CW | \
3458 MWL8K_SET_EDCA_TXOP | \
3459 MWL8K_SET_EDCA_AIFS)
3460
3461 static int
3462 mwl8k_cmd_set_edca_params(struct ieee80211_hw *hw, __u8 qnum,
3463 __u16 cw_min, __u16 cw_max,
3464 __u8 aifs, __u16 txop)
3465 {
3466 struct mwl8k_priv *priv = hw->priv;
3467 struct mwl8k_cmd_set_edca_params *cmd;
3468 int rc;
3469
3470 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3471 if (cmd == NULL)
3472 return -ENOMEM;
3473
3474 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_EDCA_PARAMS);
3475 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3476 cmd->action = cpu_to_le16(MWL8K_SET_EDCA_ALL);
3477 cmd->txop = cpu_to_le16(txop);
3478 if (priv->ap_fw) {
3479 cmd->ap.log_cw_max = cpu_to_le32(ilog2(cw_max + 1));
3480 cmd->ap.log_cw_min = cpu_to_le32(ilog2(cw_min + 1));
3481 cmd->ap.aifs = aifs;
3482 cmd->ap.txq = qnum;
3483 } else {
3484 cmd->sta.log_cw_max = (u8)ilog2(cw_max + 1);
3485 cmd->sta.log_cw_min = (u8)ilog2(cw_min + 1);
3486 cmd->sta.aifs = aifs;
3487 cmd->sta.txq = qnum;
3488 }
3489
3490 rc = mwl8k_post_cmd(hw, &cmd->header);
3491 kfree(cmd);
3492
3493 return rc;
3494 }
3495
3496 /*
3497 * CMD_SET_WMM_MODE.
3498 */
3499 struct mwl8k_cmd_set_wmm_mode {
3500 struct mwl8k_cmd_pkt header;
3501 __le16 action;
3502 } __packed;
3503
3504 static int mwl8k_cmd_set_wmm_mode(struct ieee80211_hw *hw, bool enable)
3505 {
3506 struct mwl8k_priv *priv = hw->priv;
3507 struct mwl8k_cmd_set_wmm_mode *cmd;
3508 int rc;
3509
3510 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3511 if (cmd == NULL)
3512 return -ENOMEM;
3513
3514 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_WMM_MODE);
3515 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3516 cmd->action = cpu_to_le16(!!enable);
3517
3518 rc = mwl8k_post_cmd(hw, &cmd->header);
3519 kfree(cmd);
3520
3521 if (!rc)
3522 priv->wmm_enabled = enable;
3523
3524 return rc;
3525 }
3526
3527 /*
3528 * CMD_MIMO_CONFIG.
3529 */
3530 struct mwl8k_cmd_mimo_config {
3531 struct mwl8k_cmd_pkt header;
3532 __le32 action;
3533 __u8 rx_antenna_map;
3534 __u8 tx_antenna_map;
3535 } __packed;
3536
3537 static int mwl8k_cmd_mimo_config(struct ieee80211_hw *hw, __u8 rx, __u8 tx)
3538 {
3539 struct mwl8k_cmd_mimo_config *cmd;
3540 int rc;
3541
3542 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3543 if (cmd == NULL)
3544 return -ENOMEM;
3545
3546 cmd->header.code = cpu_to_le16(MWL8K_CMD_MIMO_CONFIG);
3547 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3548 cmd->action = cpu_to_le32((u32)MWL8K_CMD_SET);
3549 cmd->rx_antenna_map = rx;
3550 cmd->tx_antenna_map = tx;
3551
3552 rc = mwl8k_post_cmd(hw, &cmd->header);
3553 kfree(cmd);
3554
3555 return rc;
3556 }
3557
3558 /*
3559 * CMD_USE_FIXED_RATE (STA version).
3560 */
3561 struct mwl8k_cmd_use_fixed_rate_sta {
3562 struct mwl8k_cmd_pkt header;
3563 __le32 action;
3564 __le32 allow_rate_drop;
3565 __le32 num_rates;
3566 struct {
3567 __le32 is_ht_rate;
3568 __le32 enable_retry;
3569 __le32 rate;
3570 __le32 retry_count;
3571 } rate_entry[8];
3572 __le32 rate_type;
3573 __le32 reserved1;
3574 __le32 reserved2;
3575 } __packed;
3576
3577 #define MWL8K_USE_AUTO_RATE 0x0002
3578 #define MWL8K_UCAST_RATE 0
3579
3580 static int mwl8k_cmd_use_fixed_rate_sta(struct ieee80211_hw *hw)
3581 {
3582 struct mwl8k_cmd_use_fixed_rate_sta *cmd;
3583 int rc;
3584
3585 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3586 if (cmd == NULL)
3587 return -ENOMEM;
3588
3589 cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
3590 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3591 cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE);
3592 cmd->rate_type = cpu_to_le32(MWL8K_UCAST_RATE);
3593
3594 rc = mwl8k_post_cmd(hw, &cmd->header);
3595 kfree(cmd);
3596
3597 return rc;
3598 }
3599
3600 /*
3601 * CMD_USE_FIXED_RATE (AP version).
3602 */
3603 struct mwl8k_cmd_use_fixed_rate_ap {
3604 struct mwl8k_cmd_pkt header;
3605 __le32 action;
3606 __le32 allow_rate_drop;
3607 __le32 num_rates;
3608 struct mwl8k_rate_entry_ap {
3609 __le32 is_ht_rate;
3610 __le32 enable_retry;
3611 __le32 rate;
3612 __le32 retry_count;
3613 } rate_entry[4];
3614 u8 multicast_rate;
3615 u8 multicast_rate_type;
3616 u8 management_rate;
3617 } __packed;
3618
3619 static int
3620 mwl8k_cmd_use_fixed_rate_ap(struct ieee80211_hw *hw, int mcast, int mgmt)
3621 {
3622 struct mwl8k_cmd_use_fixed_rate_ap *cmd;
3623 int rc;
3624
3625 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3626 if (cmd == NULL)
3627 return -ENOMEM;
3628
3629 cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
3630 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3631 cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE);
3632 cmd->multicast_rate = mcast;
3633 cmd->management_rate = mgmt;
3634
3635 rc = mwl8k_post_cmd(hw, &cmd->header);
3636 kfree(cmd);
3637
3638 return rc;
3639 }
3640
3641 /*
3642 * CMD_ENABLE_SNIFFER.
3643 */
3644 struct mwl8k_cmd_enable_sniffer {
3645 struct mwl8k_cmd_pkt header;
3646 __le32 action;
3647 } __packed;
3648
3649 static int mwl8k_cmd_enable_sniffer(struct ieee80211_hw *hw, bool enable)
3650 {
3651 struct mwl8k_cmd_enable_sniffer *cmd;
3652 int rc;
3653
3654 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3655 if (cmd == NULL)
3656 return -ENOMEM;
3657
3658 cmd->header.code = cpu_to_le16(MWL8K_CMD_ENABLE_SNIFFER);
3659 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3660 cmd->action = cpu_to_le32(!!enable);
3661
3662 rc = mwl8k_post_cmd(hw, &cmd->header);
3663 kfree(cmd);
3664
3665 return rc;
3666 }
3667
3668 struct mwl8k_cmd_update_mac_addr {
3669 struct mwl8k_cmd_pkt header;
3670 union {
3671 struct {
3672 __le16 mac_type;
3673 __u8 mac_addr[ETH_ALEN];
3674 } mbss;
3675 __u8 mac_addr[ETH_ALEN];
3676 };
3677 } __packed;
3678
3679 #define MWL8K_MAC_TYPE_PRIMARY_CLIENT 0
3680 #define MWL8K_MAC_TYPE_SECONDARY_CLIENT 1
3681 #define MWL8K_MAC_TYPE_PRIMARY_AP 2
3682 #define MWL8K_MAC_TYPE_SECONDARY_AP 3
3683
3684 static int mwl8k_cmd_update_mac_addr(struct ieee80211_hw *hw,
3685 struct ieee80211_vif *vif, u8 *mac, bool set)
3686 {
3687 struct mwl8k_priv *priv = hw->priv;
3688 struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
3689 struct mwl8k_cmd_update_mac_addr *cmd;
3690 int mac_type;
3691 int rc;
3692
3693 mac_type = MWL8K_MAC_TYPE_PRIMARY_AP;
3694 if (vif != NULL && vif->type == NL80211_IFTYPE_STATION) {
3695 if (mwl8k_vif->macid + 1 == ffs(priv->sta_macids_supported))
3696 if (priv->ap_fw)
3697 mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT;
3698 else
3699 mac_type = MWL8K_MAC_TYPE_PRIMARY_CLIENT;
3700 else
3701 mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT;
3702 } else if (vif != NULL && vif->type == NL80211_IFTYPE_AP) {
3703 if (mwl8k_vif->macid + 1 == ffs(priv->ap_macids_supported))
3704 mac_type = MWL8K_MAC_TYPE_PRIMARY_AP;
3705 else
3706 mac_type = MWL8K_MAC_TYPE_SECONDARY_AP;
3707 }
3708
3709 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3710 if (cmd == NULL)
3711 return -ENOMEM;
3712
3713 if (set)
3714 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_MAC_ADDR);
3715 else
3716 cmd->header.code = cpu_to_le16(MWL8K_CMD_DEL_MAC_ADDR);
3717
3718 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3719 if (priv->ap_fw) {
3720 cmd->mbss.mac_type = cpu_to_le16(mac_type);
3721 memcpy(cmd->mbss.mac_addr, mac, ETH_ALEN);
3722 } else {
3723 memcpy(cmd->mac_addr, mac, ETH_ALEN);
3724 }
3725
3726 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3727 kfree(cmd);
3728
3729 return rc;
3730 }
3731
3732 /*
3733 * MWL8K_CMD_SET_MAC_ADDR.
3734 */
3735 static inline int mwl8k_cmd_set_mac_addr(struct ieee80211_hw *hw,
3736 struct ieee80211_vif *vif, u8 *mac)
3737 {
3738 return mwl8k_cmd_update_mac_addr(hw, vif, mac, true);
3739 }
3740
3741 /*
3742 * MWL8K_CMD_DEL_MAC_ADDR.
3743 */
3744 static inline int mwl8k_cmd_del_mac_addr(struct ieee80211_hw *hw,
3745 struct ieee80211_vif *vif, u8 *mac)
3746 {
3747 return mwl8k_cmd_update_mac_addr(hw, vif, mac, false);
3748 }
3749
3750 /*
3751 * CMD_SET_RATEADAPT_MODE.
3752 */
3753 struct mwl8k_cmd_set_rate_adapt_mode {
3754 struct mwl8k_cmd_pkt header;
3755 __le16 action;
3756 __le16 mode;
3757 } __packed;
3758
3759 static int mwl8k_cmd_set_rateadapt_mode(struct ieee80211_hw *hw, __u16 mode)
3760 {
3761 struct mwl8k_cmd_set_rate_adapt_mode *cmd;
3762 int rc;
3763
3764 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3765 if (cmd == NULL)
3766 return -ENOMEM;
3767
3768 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATEADAPT_MODE);
3769 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3770 cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3771 cmd->mode = cpu_to_le16(mode);
3772
3773 rc = mwl8k_post_cmd(hw, &cmd->header);
3774 kfree(cmd);
3775
3776 return rc;
3777 }
3778
3779 /*
3780 * CMD_GET_WATCHDOG_BITMAP.
3781 */
3782 struct mwl8k_cmd_get_watchdog_bitmap {
3783 struct mwl8k_cmd_pkt header;
3784 u8 bitmap;
3785 } __packed;
3786
3787 static int mwl8k_cmd_get_watchdog_bitmap(struct ieee80211_hw *hw, u8 *bitmap)
3788 {
3789 struct mwl8k_cmd_get_watchdog_bitmap *cmd;
3790 int rc;
3791
3792 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3793 if (cmd == NULL)
3794 return -ENOMEM;
3795
3796 cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_WATCHDOG_BITMAP);
3797 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3798
3799 rc = mwl8k_post_cmd(hw, &cmd->header);
3800 if (!rc)
3801 *bitmap = cmd->bitmap;
3802
3803 kfree(cmd);
3804
3805 return rc;
3806 }
3807
3808 #define MWL8K_WMM_QUEUE_NUMBER 3
3809
3810 static void mwl8k_destroy_ba(struct ieee80211_hw *hw,
3811 u8 idx);
3812
3813 static void mwl8k_watchdog_ba_events(struct work_struct *work)
3814 {
3815 int rc;
3816 u8 bitmap = 0, stream_index;
3817 struct mwl8k_ampdu_stream *streams;
3818 struct mwl8k_priv *priv =
3819 container_of(work, struct mwl8k_priv, watchdog_ba_handle);
3820 struct ieee80211_hw *hw = priv->hw;
3821 int i;
3822 u32 status = 0;
3823
3824 mwl8k_fw_lock(hw);
3825
3826 rc = mwl8k_cmd_get_watchdog_bitmap(priv->hw, &bitmap);
3827 if (rc)
3828 goto done;
3829
3830 spin_lock(&priv->stream_lock);
3831
3832 /* the bitmap is the hw queue number. Map it to the ampdu queue. */
3833 for (i = 0; i < TOTAL_HW_TX_QUEUES; i++) {
3834 if (bitmap & (1 << i)) {
3835 stream_index = (i + MWL8K_WMM_QUEUE_NUMBER) %
3836 TOTAL_HW_TX_QUEUES;
3837 streams = &priv->ampdu[stream_index];
3838 if (streams->state == AMPDU_STREAM_ACTIVE) {
3839 ieee80211_stop_tx_ba_session(streams->sta,
3840 streams->tid);
3841 spin_unlock(&priv->stream_lock);
3842 mwl8k_destroy_ba(hw, stream_index);
3843 spin_lock(&priv->stream_lock);
3844 }
3845 }
3846 }
3847
3848 spin_unlock(&priv->stream_lock);
3849 done:
3850 atomic_dec(&priv->watchdog_event_pending);
3851 status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
3852 iowrite32((status | MWL8K_A2H_INT_BA_WATCHDOG),
3853 priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
3854 mwl8k_fw_unlock(hw);
3855 return;
3856 }
3857
3858
3859 /*
3860 * CMD_BSS_START.
3861 */
3862 struct mwl8k_cmd_bss_start {
3863 struct mwl8k_cmd_pkt header;
3864 __le32 enable;
3865 } __packed;
3866
3867 static int mwl8k_cmd_bss_start(struct ieee80211_hw *hw,
3868 struct ieee80211_vif *vif, int enable)
3869 {
3870 struct mwl8k_cmd_bss_start *cmd;
3871 struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
3872 struct mwl8k_priv *priv = hw->priv;
3873 int rc;
3874
3875 if (enable && (priv->running_bsses & (1 << mwl8k_vif->macid)))
3876 return 0;
3877
3878 if (!enable && !(priv->running_bsses & (1 << mwl8k_vif->macid)))
3879 return 0;
3880
3881 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3882 if (cmd == NULL)
3883 return -ENOMEM;
3884
3885 cmd->header.code = cpu_to_le16(MWL8K_CMD_BSS_START);
3886 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3887 cmd->enable = cpu_to_le32(enable);
3888
3889 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3890 kfree(cmd);
3891
3892 if (!rc) {
3893 if (enable)
3894 priv->running_bsses |= (1 << mwl8k_vif->macid);
3895 else
3896 priv->running_bsses &= ~(1 << mwl8k_vif->macid);
3897 }
3898 return rc;
3899 }
3900
3901 static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable, u32 bitmap)
3902 {
3903 struct mwl8k_priv *priv = hw->priv;
3904 struct mwl8k_vif *mwl8k_vif, *tmp_vif;
3905 struct ieee80211_vif *vif;
3906
3907 list_for_each_entry_safe(mwl8k_vif, tmp_vif, &priv->vif_list, list) {
3908 vif = mwl8k_vif->vif;
3909
3910 if (!(bitmap & (1 << mwl8k_vif->macid)))
3911 continue;
3912
3913 if (vif->type == NL80211_IFTYPE_AP)
3914 mwl8k_cmd_bss_start(hw, vif, enable);
3915 }
3916 }
3917 /*
3918 * CMD_BASTREAM.
3919 */
3920
3921 /*
3922 * UPSTREAM is tx direction
3923 */
3924 #define BASTREAM_FLAG_DIRECTION_UPSTREAM 0x00
3925 #define BASTREAM_FLAG_IMMEDIATE_TYPE 0x01
3926
3927 enum ba_stream_action_type {
3928 MWL8K_BA_CREATE,
3929 MWL8K_BA_UPDATE,
3930 MWL8K_BA_DESTROY,
3931 MWL8K_BA_FLUSH,
3932 MWL8K_BA_CHECK,
3933 };
3934
3935
3936 struct mwl8k_create_ba_stream {
3937 __le32 flags;
3938 __le32 idle_thrs;
3939 __le32 bar_thrs;
3940 __le32 window_size;
3941 u8 peer_mac_addr[6];
3942 u8 dialog_token;
3943 u8 tid;
3944 u8 queue_id;
3945 u8 param_info;
3946 __le32 ba_context;
3947 u8 reset_seq_no_flag;
3948 __le16 curr_seq_no;
3949 u8 sta_src_mac_addr[6];
3950 } __packed;
3951
3952 struct mwl8k_destroy_ba_stream {
3953 __le32 flags;
3954 __le32 ba_context;
3955 } __packed;
3956
3957 struct mwl8k_cmd_bastream {
3958 struct mwl8k_cmd_pkt header;
3959 __le32 action;
3960 union {
3961 struct mwl8k_create_ba_stream create_params;
3962 struct mwl8k_destroy_ba_stream destroy_params;
3963 };
3964 } __packed;
3965
3966 static int
3967 mwl8k_check_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream,
3968 struct ieee80211_vif *vif)
3969 {
3970 struct mwl8k_cmd_bastream *cmd;
3971 int rc;
3972
3973 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3974 if (cmd == NULL)
3975 return -ENOMEM;
3976
3977 cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
3978 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3979
3980 cmd->action = cpu_to_le32(MWL8K_BA_CHECK);
3981
3982 cmd->create_params.queue_id = stream->idx;
3983 memcpy(&cmd->create_params.peer_mac_addr[0], stream->sta->addr,
3984 ETH_ALEN);
3985 cmd->create_params.tid = stream->tid;
3986
3987 cmd->create_params.flags =
3988 cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE) |
3989 cpu_to_le32(BASTREAM_FLAG_DIRECTION_UPSTREAM);
3990
3991 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3992
3993 kfree(cmd);
3994
3995 return rc;
3996 }
3997
3998 static int
3999 mwl8k_create_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream,
4000 u8 buf_size, struct ieee80211_vif *vif)
4001 {
4002 struct mwl8k_cmd_bastream *cmd;
4003 int rc;
4004
4005 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4006 if (cmd == NULL)
4007 return -ENOMEM;
4008
4009
4010 cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
4011 cmd->header.length = cpu_to_le16(sizeof(*cmd));
4012
4013 cmd->action = cpu_to_le32(MWL8K_BA_CREATE);
4014
4015 cmd->create_params.bar_thrs = cpu_to_le32((u32)buf_size);
4016 cmd->create_params.window_size = cpu_to_le32((u32)buf_size);
4017 cmd->create_params.queue_id = stream->idx;
4018
4019 memcpy(cmd->create_params.peer_mac_addr, stream->sta->addr, ETH_ALEN);
4020 cmd->create_params.tid = stream->tid;
4021 cmd->create_params.curr_seq_no = cpu_to_le16(0);
4022 cmd->create_params.reset_seq_no_flag = 1;
4023
4024 cmd->create_params.param_info =
4025 (stream->sta->ht_cap.ampdu_factor &
4026 IEEE80211_HT_AMPDU_PARM_FACTOR) |
4027 ((stream->sta->ht_cap.ampdu_density << 2) &
4028 IEEE80211_HT_AMPDU_PARM_DENSITY);
4029
4030 cmd->create_params.flags =
4031 cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE |
4032 BASTREAM_FLAG_DIRECTION_UPSTREAM);
4033
4034 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4035
4036 wiphy_debug(hw->wiphy, "Created a BA stream for %pM : tid %d\n",
4037 stream->sta->addr, stream->tid);
4038 kfree(cmd);
4039
4040 return rc;
4041 }
4042
4043 static void mwl8k_destroy_ba(struct ieee80211_hw *hw,
4044 u8 idx)
4045 {
4046 struct mwl8k_cmd_bastream *cmd;
4047
4048 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4049 if (cmd == NULL)
4050 return;
4051
4052 cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
4053 cmd->header.length = cpu_to_le16(sizeof(*cmd));
4054 cmd->action = cpu_to_le32(MWL8K_BA_DESTROY);
4055
4056 cmd->destroy_params.ba_context = cpu_to_le32(idx);
4057 mwl8k_post_cmd(hw, &cmd->header);
4058
4059 wiphy_debug(hw->wiphy, "Deleted BA stream index %d\n", idx);
4060
4061 kfree(cmd);
4062 }
4063
4064 /*
4065 * CMD_SET_NEW_STN.
4066 */
4067 struct mwl8k_cmd_set_new_stn {
4068 struct mwl8k_cmd_pkt header;
4069 __le16 aid;
4070 __u8 mac_addr[6];
4071 __le16 stn_id;
4072 __le16 action;
4073 __le16 rsvd;
4074 __le32 legacy_rates;
4075 __u8 ht_rates[4];
4076 __le16 cap_info;
4077 __le16 ht_capabilities_info;
4078 __u8 mac_ht_param_info;
4079 __u8 rev;
4080 __u8 control_channel;
4081 __u8 add_channel;
4082 __le16 op_mode;
4083 __le16 stbc;
4084 __u8 add_qos_info;
4085 __u8 is_qos_sta;
4086 __le32 fw_sta_ptr;
4087 } __packed;
4088
4089 #define MWL8K_STA_ACTION_ADD 0
4090 #define MWL8K_STA_ACTION_REMOVE 2
4091
4092 static int mwl8k_cmd_set_new_stn_add(struct ieee80211_hw *hw,
4093 struct ieee80211_vif *vif,
4094 struct ieee80211_sta *sta)
4095 {
4096 struct mwl8k_cmd_set_new_stn *cmd;
4097 u32 rates;
4098 int rc;
4099
4100 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4101 if (cmd == NULL)
4102 return -ENOMEM;
4103
4104 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4105 cmd->header.length = cpu_to_le16(sizeof(*cmd));
4106 cmd->aid = cpu_to_le16(sta->aid);
4107 memcpy(cmd->mac_addr, sta->addr, ETH_ALEN);
4108 cmd->stn_id = cpu_to_le16(sta->aid);
4109 cmd->action = cpu_to_le16(MWL8K_STA_ACTION_ADD);
4110 if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
4111 rates = sta->supp_rates[NL80211_BAND_2GHZ];
4112 else
4113 rates = sta->supp_rates[NL80211_BAND_5GHZ] << 5;
4114 cmd->legacy_rates = cpu_to_le32(rates);
4115 if (sta->ht_cap.ht_supported) {
4116 cmd->ht_rates[0] = sta->ht_cap.mcs.rx_mask[0];
4117 cmd->ht_rates[1] = sta->ht_cap.mcs.rx_mask[1];
4118 cmd->ht_rates[2] = sta->ht_cap.mcs.rx_mask[2];
4119 cmd->ht_rates[3] = sta->ht_cap.mcs.rx_mask[3];
4120 cmd->ht_capabilities_info = cpu_to_le16(sta->ht_cap.cap);
4121 cmd->mac_ht_param_info = (sta->ht_cap.ampdu_factor & 3) |
4122 ((sta->ht_cap.ampdu_density & 7) << 2);
4123 cmd->is_qos_sta = 1;
4124 }
4125
4126 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4127 kfree(cmd);
4128
4129 return rc;
4130 }
4131
4132 static int mwl8k_cmd_set_new_stn_add_self(struct ieee80211_hw *hw,
4133 struct ieee80211_vif *vif)
4134 {
4135 struct mwl8k_cmd_set_new_stn *cmd;
4136 int rc;
4137
4138 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4139 if (cmd == NULL)
4140 return -ENOMEM;
4141
4142 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4143 cmd->header.length = cpu_to_le16(sizeof(*cmd));
4144 memcpy(cmd->mac_addr, vif->addr, ETH_ALEN);
4145
4146 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4147 kfree(cmd);
4148
4149 return rc;
4150 }
4151
4152 static int mwl8k_cmd_set_new_stn_del(struct ieee80211_hw *hw,
4153 struct ieee80211_vif *vif, u8 *addr)
4154 {
4155 struct mwl8k_cmd_set_new_stn *cmd;
4156 struct mwl8k_priv *priv = hw->priv;
4157 int rc, i;
4158 u8 idx;
4159
4160 spin_lock(&priv->stream_lock);
4161 /* Destroy any active ampdu streams for this sta */
4162 for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
4163 struct mwl8k_ampdu_stream *s;
4164 s = &priv->ampdu[i];
4165 if (s->state != AMPDU_NO_STREAM) {
4166 if (memcmp(s->sta->addr, addr, ETH_ALEN) == 0) {
4167 if (s->state == AMPDU_STREAM_ACTIVE) {
4168 idx = s->idx;
4169 spin_unlock(&priv->stream_lock);
4170 mwl8k_destroy_ba(hw, idx);
4171 spin_lock(&priv->stream_lock);
4172 } else if (s->state == AMPDU_STREAM_NEW) {
4173 mwl8k_remove_stream(hw, s);
4174 }
4175 }
4176 }
4177 }
4178
4179 spin_unlock(&priv->stream_lock);
4180
4181 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4182 if (cmd == NULL)
4183 return -ENOMEM;
4184
4185 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4186 cmd->header.length = cpu_to_le16(sizeof(*cmd));
4187 memcpy(cmd->mac_addr, addr, ETH_ALEN);
4188 cmd->action = cpu_to_le16(MWL8K_STA_ACTION_REMOVE);
4189
4190 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4191 kfree(cmd);
4192
4193 return rc;
4194 }
4195
4196 /*
4197 * CMD_UPDATE_ENCRYPTION.
4198 */
4199
4200 #define MAX_ENCR_KEY_LENGTH 16
4201 #define MIC_KEY_LENGTH 8
4202
4203 struct mwl8k_cmd_update_encryption {
4204 struct mwl8k_cmd_pkt header;
4205
4206 __le32 action;
4207 __le32 reserved;
4208 __u8 mac_addr[6];
4209 __u8 encr_type;
4210
4211 } __packed;
4212
4213 struct mwl8k_cmd_set_key {
4214 struct mwl8k_cmd_pkt header;
4215
4216 __le32 action;
4217 __le32 reserved;
4218 __le16 length;
4219 __le16 key_type_id;
4220 __le32 key_info;
4221 __le32 key_id;
4222 __le16 key_len;
4223 __u8 key_material[MAX_ENCR_KEY_LENGTH];
4224 __u8 tkip_tx_mic_key[MIC_KEY_LENGTH];
4225 __u8 tkip_rx_mic_key[MIC_KEY_LENGTH];
4226 __le16 tkip_rsc_low;
4227 __le32 tkip_rsc_high;
4228 __le16 tkip_tsc_low;
4229 __le32 tkip_tsc_high;
4230 __u8 mac_addr[6];
4231 } __packed;
4232
4233 enum {
4234 MWL8K_ENCR_ENABLE,
4235 MWL8K_ENCR_SET_KEY,
4236 MWL8K_ENCR_REMOVE_KEY,
4237 MWL8K_ENCR_SET_GROUP_KEY,
4238 };
4239
4240 #define MWL8K_UPDATE_ENCRYPTION_TYPE_WEP 0
4241 #define MWL8K_UPDATE_ENCRYPTION_TYPE_DISABLE 1
4242 #define MWL8K_UPDATE_ENCRYPTION_TYPE_TKIP 4
4243 #define MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED 7
4244 #define MWL8K_UPDATE_ENCRYPTION_TYPE_AES 8
4245
4246 enum {
4247 MWL8K_ALG_WEP,
4248 MWL8K_ALG_TKIP,
4249 MWL8K_ALG_CCMP,
4250 };
4251
4252 #define MWL8K_KEY_FLAG_TXGROUPKEY 0x00000004
4253 #define MWL8K_KEY_FLAG_PAIRWISE 0x00000008
4254 #define MWL8K_KEY_FLAG_TSC_VALID 0x00000040
4255 #define MWL8K_KEY_FLAG_WEP_TXKEY 0x01000000
4256 #define MWL8K_KEY_FLAG_MICKEY_VALID 0x02000000
4257
4258 static int mwl8k_cmd_update_encryption_enable(struct ieee80211_hw *hw,
4259 struct ieee80211_vif *vif,
4260 u8 *addr,
4261 u8 encr_type)
4262 {
4263 struct mwl8k_cmd_update_encryption *cmd;
4264 int rc;
4265
4266 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4267 if (cmd == NULL)
4268 return -ENOMEM;
4269
4270 cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION);
4271 cmd->header.length = cpu_to_le16(sizeof(*cmd));
4272 cmd->action = cpu_to_le32(MWL8K_ENCR_ENABLE);
4273 memcpy(cmd->mac_addr, addr, ETH_ALEN);
4274 cmd->encr_type = encr_type;
4275
4276 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4277 kfree(cmd);
4278
4279 return rc;
4280 }
4281
4282 static int mwl8k_encryption_set_cmd_info(struct mwl8k_cmd_set_key *cmd,
4283 u8 *addr,
4284 struct ieee80211_key_conf *key)
4285 {
4286 cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION);
4287 cmd->header.length = cpu_to_le16(sizeof(*cmd));
4288 cmd->length = cpu_to_le16(sizeof(*cmd) -
4289 offsetof(struct mwl8k_cmd_set_key, length));
4290 cmd->key_id = cpu_to_le32(key->keyidx);
4291 cmd->key_len = cpu_to_le16(key->keylen);
4292 memcpy(cmd->mac_addr, addr, ETH_ALEN);
4293
4294 switch (key->cipher) {
4295 case WLAN_CIPHER_SUITE_WEP40:
4296 case WLAN_CIPHER_SUITE_WEP104:
4297 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_WEP);
4298 if (key->keyidx == 0)
4299 cmd->key_info = cpu_to_le32(MWL8K_KEY_FLAG_WEP_TXKEY);
4300
4301 break;
4302 case WLAN_CIPHER_SUITE_TKIP:
4303 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_TKIP);
4304 cmd->key_info = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4305 ? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE)
4306 : cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY);
4307 cmd->key_info |= cpu_to_le32(MWL8K_KEY_FLAG_MICKEY_VALID
4308 | MWL8K_KEY_FLAG_TSC_VALID);
4309 break;
4310 case WLAN_CIPHER_SUITE_CCMP:
4311 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_CCMP);
4312 cmd->key_info = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4313 ? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE)
4314 : cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY);
4315 break;
4316 default:
4317 return -ENOTSUPP;
4318 }
4319
4320 return 0;
4321 }
4322
4323 static int mwl8k_cmd_encryption_set_key(struct ieee80211_hw *hw,
4324 struct ieee80211_vif *vif,
4325 u8 *addr,
4326 struct ieee80211_key_conf *key)
4327 {
4328 struct mwl8k_cmd_set_key *cmd;
4329 int rc;
4330 int keymlen;
4331 u32 action;
4332 u8 idx;
4333 struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4334
4335 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4336 if (cmd == NULL)
4337 return -ENOMEM;
4338
4339 rc = mwl8k_encryption_set_cmd_info(cmd, addr, key);
4340 if (rc < 0)
4341 goto done;
4342
4343 idx = key->keyidx;
4344
4345 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4346 action = MWL8K_ENCR_SET_KEY;
4347 else
4348 action = MWL8K_ENCR_SET_GROUP_KEY;
4349
4350 switch (key->cipher) {
4351 case WLAN_CIPHER_SUITE_WEP40:
4352 case WLAN_CIPHER_SUITE_WEP104:
4353 if (!mwl8k_vif->wep_key_conf[idx].enabled) {
4354 memcpy(mwl8k_vif->wep_key_conf[idx].key, key,
4355 sizeof(*key) + key->keylen);
4356 mwl8k_vif->wep_key_conf[idx].enabled = 1;
4357 }
4358
4359 keymlen = key->keylen;
4360 action = MWL8K_ENCR_SET_KEY;
4361 break;
4362 case WLAN_CIPHER_SUITE_TKIP:
4363 keymlen = MAX_ENCR_KEY_LENGTH + 2 * MIC_KEY_LENGTH;
4364 break;
4365 case WLAN_CIPHER_SUITE_CCMP:
4366 keymlen = key->keylen;
4367 break;
4368 default:
4369 rc = -ENOTSUPP;
4370 goto done;
4371 }
4372
4373 memcpy(cmd->key_material, key->key, keymlen);
4374 cmd->action = cpu_to_le32(action);
4375
4376 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4377 done:
4378 kfree(cmd);
4379
4380 return rc;
4381 }
4382
4383 static int mwl8k_cmd_encryption_remove_key(struct ieee80211_hw *hw,
4384 struct ieee80211_vif *vif,
4385 u8 *addr,
4386 struct ieee80211_key_conf *key)
4387 {
4388 struct mwl8k_cmd_set_key *cmd;
4389 int rc;
4390 struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4391
4392 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4393 if (cmd == NULL)
4394 return -ENOMEM;
4395
4396 rc = mwl8k_encryption_set_cmd_info(cmd, addr, key);
4397 if (rc < 0)
4398 goto done;
4399
4400 if (key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
4401 key->cipher == WLAN_CIPHER_SUITE_WEP104)
4402 mwl8k_vif->wep_key_conf[key->keyidx].enabled = 0;
4403
4404 cmd->action = cpu_to_le32(MWL8K_ENCR_REMOVE_KEY);
4405
4406 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4407 done:
4408 kfree(cmd);
4409
4410 return rc;
4411 }
4412
4413 static int mwl8k_set_key(struct ieee80211_hw *hw,
4414 enum set_key_cmd cmd_param,
4415 struct ieee80211_vif *vif,
4416 struct ieee80211_sta *sta,
4417 struct ieee80211_key_conf *key)
4418 {
4419 int rc = 0;
4420 u8 encr_type;
4421 u8 *addr;
4422 struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4423 struct mwl8k_priv *priv = hw->priv;
4424
4425 if (vif->type == NL80211_IFTYPE_STATION && !priv->ap_fw)
4426 return -EOPNOTSUPP;
4427
4428 if (sta == NULL)
4429 addr = vif->addr;
4430 else
4431 addr = sta->addr;
4432
4433 if (cmd_param == SET_KEY) {
4434 rc = mwl8k_cmd_encryption_set_key(hw, vif, addr, key);
4435 if (rc)
4436 goto out;
4437
4438 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40)
4439 || (key->cipher == WLAN_CIPHER_SUITE_WEP104))
4440 encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_WEP;
4441 else
4442 encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED;
4443
4444 rc = mwl8k_cmd_update_encryption_enable(hw, vif, addr,
4445 encr_type);
4446 if (rc)
4447 goto out;
4448
4449 mwl8k_vif->is_hw_crypto_enabled = true;
4450
4451 } else {
4452 rc = mwl8k_cmd_encryption_remove_key(hw, vif, addr, key);
4453
4454 if (rc)
4455 goto out;
4456 }
4457 out:
4458 return rc;
4459 }
4460
4461 /*
4462 * CMD_UPDATE_STADB.
4463 */
4464 struct ewc_ht_info {
4465 __le16 control1;
4466 __le16 control2;
4467 __le16 control3;
4468 } __packed;
4469
4470 struct peer_capability_info {
4471 /* Peer type - AP vs. STA. */
4472 __u8 peer_type;
4473
4474 /* Basic 802.11 capabilities from assoc resp. */
4475 __le16 basic_caps;
4476
4477 /* Set if peer supports 802.11n high throughput (HT). */
4478 __u8 ht_support;
4479
4480 /* Valid if HT is supported. */
4481 __le16 ht_caps;
4482 __u8 extended_ht_caps;
4483 struct ewc_ht_info ewc_info;
4484
4485 /* Legacy rate table. Intersection of our rates and peer rates. */
4486 __u8 legacy_rates[12];
4487
4488 /* HT rate table. Intersection of our rates and peer rates. */
4489 __u8 ht_rates[16];
4490 __u8 pad[16];
4491
4492 /* If set, interoperability mode, no proprietary extensions. */
4493 __u8 interop;
4494 __u8 pad2;
4495 __u8 station_id;
4496 __le16 amsdu_enabled;
4497 } __packed;
4498
4499 struct mwl8k_cmd_update_stadb {
4500 struct mwl8k_cmd_pkt header;
4501
4502 /* See STADB_ACTION_TYPE */
4503 __le32 action;
4504
4505 /* Peer MAC address */
4506 __u8 peer_addr[ETH_ALEN];
4507
4508 __le32 reserved;
4509
4510 /* Peer info - valid during add/update. */
4511 struct peer_capability_info peer_info;
4512 } __packed;
4513
4514 #define MWL8K_STA_DB_MODIFY_ENTRY 1
4515 #define MWL8K_STA_DB_DEL_ENTRY 2
4516
4517 /* Peer Entry flags - used to define the type of the peer node */
4518 #define MWL8K_PEER_TYPE_ACCESSPOINT 2
4519
4520 static int mwl8k_cmd_update_stadb_add(struct ieee80211_hw *hw,
4521 struct ieee80211_vif *vif,
4522 struct ieee80211_sta *sta)
4523 {
4524 struct mwl8k_cmd_update_stadb *cmd;
4525 struct peer_capability_info *p;
4526 u32 rates;
4527 int rc;
4528
4529 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4530 if (cmd == NULL)
4531 return -ENOMEM;
4532
4533 cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
4534 cmd->header.length = cpu_to_le16(sizeof(*cmd));
4535 cmd->action = cpu_to_le32(MWL8K_STA_DB_MODIFY_ENTRY);
4536 memcpy(cmd->peer_addr, sta->addr, ETH_ALEN);
4537
4538 p = &cmd->peer_info;
4539 p->peer_type = MWL8K_PEER_TYPE_ACCESSPOINT;
4540 p->basic_caps = cpu_to_le16(vif->bss_conf.assoc_capability);
4541 p->ht_support = sta->ht_cap.ht_supported;
4542 p->ht_caps = cpu_to_le16(sta->ht_cap.cap);
4543 p->extended_ht_caps = (sta->ht_cap.ampdu_factor & 3) |
4544 ((sta->ht_cap.ampdu_density & 7) << 2);
4545 if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
4546 rates = sta->supp_rates[NL80211_BAND_2GHZ];
4547 else
4548 rates = sta->supp_rates[NL80211_BAND_5GHZ] << 5;
4549 legacy_rate_mask_to_array(p->legacy_rates, rates);
4550 memcpy(p->ht_rates, sta->ht_cap.mcs.rx_mask, 16);
4551 p->interop = 1;
4552 p->amsdu_enabled = 0;
4553
4554 rc = mwl8k_post_cmd(hw, &cmd->header);
4555 if (!rc)
4556 rc = p->station_id;
4557 kfree(cmd);
4558
4559 return rc;
4560 }
4561
4562 static int mwl8k_cmd_update_stadb_del(struct ieee80211_hw *hw,
4563 struct ieee80211_vif *vif, u8 *addr)
4564 {
4565 struct mwl8k_cmd_update_stadb *cmd;
4566 int rc;
4567
4568 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4569 if (cmd == NULL)
4570 return -ENOMEM;
4571
4572 cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
4573 cmd->header.length = cpu_to_le16(sizeof(*cmd));
4574 cmd->action = cpu_to_le32(MWL8K_STA_DB_DEL_ENTRY);
4575 memcpy(cmd->peer_addr, addr, ETH_ALEN);
4576
4577 rc = mwl8k_post_cmd(hw, &cmd->header);
4578 kfree(cmd);
4579
4580 return rc;
4581 }
4582
4583
4584 /*
4585 * Interrupt handling.
4586 */
4587 static irqreturn_t mwl8k_interrupt(int irq, void *dev_id)
4588 {
4589 struct ieee80211_hw *hw = dev_id;
4590 struct mwl8k_priv *priv = hw->priv;
4591 u32 status;
4592
4593 status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4594 if (!status)
4595 return IRQ_NONE;
4596
4597 if (status & MWL8K_A2H_INT_TX_DONE) {
4598 status &= ~MWL8K_A2H_INT_TX_DONE;
4599 tasklet_schedule(&priv->poll_tx_task);
4600 }
4601
4602 if (status & MWL8K_A2H_INT_RX_READY) {
4603 status &= ~MWL8K_A2H_INT_RX_READY;
4604 tasklet_schedule(&priv->poll_rx_task);
4605 }
4606
4607 if (status & MWL8K_A2H_INT_BA_WATCHDOG) {
4608 iowrite32(~MWL8K_A2H_INT_BA_WATCHDOG,
4609 priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
4610
4611 atomic_inc(&priv->watchdog_event_pending);
4612 status &= ~MWL8K_A2H_INT_BA_WATCHDOG;
4613 ieee80211_queue_work(hw, &priv->watchdog_ba_handle);
4614 }
4615
4616 if (status)
4617 iowrite32(~status, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4618
4619 if (status & MWL8K_A2H_INT_OPC_DONE) {
4620 if (priv->hostcmd_wait != NULL)
4621 complete(priv->hostcmd_wait);
4622 }
4623
4624 if (status & MWL8K_A2H_INT_QUEUE_EMPTY) {
4625 if (!mutex_is_locked(&priv->fw_mutex) &&
4626 priv->radio_on && priv->pending_tx_pkts)
4627 mwl8k_tx_start(priv);
4628 }
4629
4630 return IRQ_HANDLED;
4631 }
4632
4633 static void mwl8k_tx_poll(unsigned long data)
4634 {
4635 struct ieee80211_hw *hw = (struct ieee80211_hw *)data;
4636 struct mwl8k_priv *priv = hw->priv;
4637 int limit;
4638 int i;
4639
4640 limit = 32;
4641
4642 spin_lock(&priv->tx_lock);
4643
4644 for (i = 0; i < mwl8k_tx_queues(priv); i++)
4645 limit -= mwl8k_txq_reclaim(hw, i, limit, 0);
4646
4647 if (!priv->pending_tx_pkts && priv->tx_wait != NULL) {
4648 complete(priv->tx_wait);
4649 priv->tx_wait = NULL;
4650 }
4651
4652 spin_unlock(&priv->tx_lock);
4653
4654 if (limit) {
4655 writel(~MWL8K_A2H_INT_TX_DONE,
4656 priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4657 } else {
4658 tasklet_schedule(&priv->poll_tx_task);
4659 }
4660 }
4661
4662 static void mwl8k_rx_poll(unsigned long data)
4663 {
4664 struct ieee80211_hw *hw = (struct ieee80211_hw *)data;
4665 struct mwl8k_priv *priv = hw->priv;
4666 int limit;
4667
4668 limit = 32;
4669 limit -= rxq_process(hw, 0, limit);
4670 limit -= rxq_refill(hw, 0, limit);
4671
4672 if (limit) {
4673 writel(~MWL8K_A2H_INT_RX_READY,
4674 priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4675 } else {
4676 tasklet_schedule(&priv->poll_rx_task);
4677 }
4678 }
4679
4680
4681 /*
4682 * Core driver operations.
4683 */
4684 static void mwl8k_tx(struct ieee80211_hw *hw,
4685 struct ieee80211_tx_control *control,
4686 struct sk_buff *skb)
4687 {
4688 struct mwl8k_priv *priv = hw->priv;
4689 int index = skb_get_queue_mapping(skb);
4690
4691 if (!priv->radio_on) {
4692 wiphy_debug(hw->wiphy,
4693 "dropped TX frame since radio disabled\n");
4694 dev_kfree_skb(skb);
4695 return;
4696 }
4697
4698 mwl8k_txq_xmit(hw, index, control->sta, skb);
4699 }
4700
4701 static int mwl8k_start(struct ieee80211_hw *hw)
4702 {
4703 struct mwl8k_priv *priv = hw->priv;
4704 int rc;
4705
4706 rc = request_irq(priv->pdev->irq, mwl8k_interrupt,
4707 IRQF_SHARED, MWL8K_NAME, hw);
4708 if (rc) {
4709 priv->irq = -1;
4710 wiphy_err(hw->wiphy, "failed to register IRQ handler\n");
4711 return -EIO;
4712 }
4713 priv->irq = priv->pdev->irq;
4714
4715 /* Enable TX reclaim and RX tasklets. */
4716 tasklet_enable(&priv->poll_tx_task);
4717 tasklet_enable(&priv->poll_rx_task);
4718
4719 /* Enable interrupts */
4720 iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4721 iowrite32(MWL8K_A2H_EVENTS,
4722 priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
4723
4724 rc = mwl8k_fw_lock(hw);
4725 if (!rc) {
4726 rc = mwl8k_cmd_radio_enable(hw);
4727
4728 if (!priv->ap_fw) {
4729 if (!rc)
4730 rc = mwl8k_cmd_enable_sniffer(hw, 0);
4731
4732 if (!rc)
4733 rc = mwl8k_cmd_set_pre_scan(hw);
4734
4735 if (!rc)
4736 rc = mwl8k_cmd_set_post_scan(hw,
4737 "\x00\x00\x00\x00\x00\x00");
4738 }
4739
4740 if (!rc)
4741 rc = mwl8k_cmd_set_rateadapt_mode(hw, 0);
4742
4743 if (!rc)
4744 rc = mwl8k_cmd_set_wmm_mode(hw, 0);
4745
4746 mwl8k_fw_unlock(hw);
4747 }
4748
4749 if (rc) {
4750 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4751 free_irq(priv->pdev->irq, hw);
4752 priv->irq = -1;
4753 tasklet_disable(&priv->poll_tx_task);
4754 tasklet_disable(&priv->poll_rx_task);
4755 } else {
4756 ieee80211_wake_queues(hw);
4757 }
4758
4759 return rc;
4760 }
4761
4762 static void mwl8k_stop(struct ieee80211_hw *hw)
4763 {
4764 struct mwl8k_priv *priv = hw->priv;
4765 int i;
4766
4767 if (!priv->hw_restart_in_progress)
4768 mwl8k_cmd_radio_disable(hw);
4769
4770 ieee80211_stop_queues(hw);
4771
4772 /* Disable interrupts */
4773 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4774 if (priv->irq != -1) {
4775 free_irq(priv->pdev->irq, hw);
4776 priv->irq = -1;
4777 }
4778
4779 /* Stop finalize join worker */
4780 cancel_work_sync(&priv->finalize_join_worker);
4781 cancel_work_sync(&priv->watchdog_ba_handle);
4782 if (priv->beacon_skb != NULL)
4783 dev_kfree_skb(priv->beacon_skb);
4784
4785 /* Stop TX reclaim and RX tasklets. */
4786 tasklet_disable(&priv->poll_tx_task);
4787 tasklet_disable(&priv->poll_rx_task);
4788
4789 /* Return all skbs to mac80211 */
4790 for (i = 0; i < mwl8k_tx_queues(priv); i++)
4791 mwl8k_txq_reclaim(hw, i, INT_MAX, 1);
4792 }
4793
4794 static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image);
4795
4796 static int mwl8k_add_interface(struct ieee80211_hw *hw,
4797 struct ieee80211_vif *vif)
4798 {
4799 struct mwl8k_priv *priv = hw->priv;
4800 struct mwl8k_vif *mwl8k_vif;
4801 u32 macids_supported;
4802 int macid, rc;
4803 struct mwl8k_device_info *di;
4804
4805 /*
4806 * Reject interface creation if sniffer mode is active, as
4807 * STA operation is mutually exclusive with hardware sniffer
4808 * mode. (Sniffer mode is only used on STA firmware.)
4809 */
4810 if (priv->sniffer_enabled) {
4811 wiphy_info(hw->wiphy,
4812 "unable to create STA interface because sniffer mode is enabled\n");
4813 return -EINVAL;
4814 }
4815
4816 di = priv->device_info;
4817 switch (vif->type) {
4818 case NL80211_IFTYPE_AP:
4819 if (!priv->ap_fw && di->fw_image_ap) {
4820 /* we must load the ap fw to meet this request */
4821 if (!list_empty(&priv->vif_list))
4822 return -EBUSY;
4823 rc = mwl8k_reload_firmware(hw, di->fw_image_ap);
4824 if (rc)
4825 return rc;
4826 }
4827 macids_supported = priv->ap_macids_supported;
4828 break;
4829 case NL80211_IFTYPE_STATION:
4830 if (priv->ap_fw && di->fw_image_sta) {
4831 if (!list_empty(&priv->vif_list)) {
4832 wiphy_warn(hw->wiphy, "AP interface is running.\n"
4833 "Adding STA interface for WDS");
4834 } else {
4835 /* we must load the sta fw to
4836 * meet this request.
4837 */
4838 rc = mwl8k_reload_firmware(hw,
4839 di->fw_image_sta);
4840 if (rc)
4841 return rc;
4842 }
4843 }
4844 macids_supported = priv->sta_macids_supported;
4845 break;
4846 default:
4847 return -EINVAL;
4848 }
4849
4850 macid = ffs(macids_supported & ~priv->macids_used);
4851 if (!macid--)
4852 return -EBUSY;
4853
4854 /* Setup driver private area. */
4855 mwl8k_vif = MWL8K_VIF(vif);
4856 memset(mwl8k_vif, 0, sizeof(*mwl8k_vif));
4857 mwl8k_vif->vif = vif;
4858 mwl8k_vif->macid = macid;
4859 mwl8k_vif->seqno = 0;
4860 memcpy(mwl8k_vif->bssid, vif->addr, ETH_ALEN);
4861 mwl8k_vif->is_hw_crypto_enabled = false;
4862
4863 /* Set the mac address. */
4864 mwl8k_cmd_set_mac_addr(hw, vif, vif->addr);
4865
4866 if (vif->type == NL80211_IFTYPE_AP)
4867 mwl8k_cmd_set_new_stn_add_self(hw, vif);
4868
4869 priv->macids_used |= 1 << mwl8k_vif->macid;
4870 list_add_tail(&mwl8k_vif->list, &priv->vif_list);
4871
4872 return 0;
4873 }
4874
4875 static void mwl8k_remove_vif(struct mwl8k_priv *priv, struct mwl8k_vif *vif)
4876 {
4877 /* Has ieee80211_restart_hw re-added the removed interfaces? */
4878 if (!priv->macids_used)
4879 return;
4880
4881 priv->macids_used &= ~(1 << vif->macid);
4882 list_del(&vif->list);
4883 }
4884
4885 static void mwl8k_remove_interface(struct ieee80211_hw *hw,
4886 struct ieee80211_vif *vif)
4887 {
4888 struct mwl8k_priv *priv = hw->priv;
4889 struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4890
4891 if (vif->type == NL80211_IFTYPE_AP)
4892 mwl8k_cmd_set_new_stn_del(hw, vif, vif->addr);
4893
4894 mwl8k_cmd_del_mac_addr(hw, vif, vif->addr);
4895
4896 mwl8k_remove_vif(priv, mwl8k_vif);
4897 }
4898
4899 static void mwl8k_hw_restart_work(struct work_struct *work)
4900 {
4901 struct mwl8k_priv *priv =
4902 container_of(work, struct mwl8k_priv, fw_reload);
4903 struct ieee80211_hw *hw = priv->hw;
4904 struct mwl8k_device_info *di;
4905 int rc;
4906
4907 /* If some command is waiting for a response, clear it */
4908 if (priv->hostcmd_wait != NULL) {
4909 complete(priv->hostcmd_wait);
4910 priv->hostcmd_wait = NULL;
4911 }
4912
4913 priv->hw_restart_owner = current;
4914 di = priv->device_info;
4915 mwl8k_fw_lock(hw);
4916
4917 if (priv->ap_fw)
4918 rc = mwl8k_reload_firmware(hw, di->fw_image_ap);
4919 else
4920 rc = mwl8k_reload_firmware(hw, di->fw_image_sta);
4921
4922 if (rc)
4923 goto fail;
4924
4925 priv->hw_restart_owner = NULL;
4926 priv->hw_restart_in_progress = false;
4927
4928 /*
4929 * This unlock will wake up the queues and
4930 * also opens the command path for other
4931 * commands
4932 */
4933 mwl8k_fw_unlock(hw);
4934
4935 ieee80211_restart_hw(hw);
4936
4937 wiphy_err(hw->wiphy, "Firmware restarted successfully\n");
4938
4939 return;
4940 fail:
4941 mwl8k_fw_unlock(hw);
4942
4943 wiphy_err(hw->wiphy, "Firmware restart failed\n");
4944 }
4945
4946 static int mwl8k_config(struct ieee80211_hw *hw, u32 changed)
4947 {
4948 struct ieee80211_conf *conf = &hw->conf;
4949 struct mwl8k_priv *priv = hw->priv;
4950 int rc;
4951
4952 rc = mwl8k_fw_lock(hw);
4953 if (rc)
4954 return rc;
4955
4956 if (conf->flags & IEEE80211_CONF_IDLE)
4957 rc = mwl8k_cmd_radio_disable(hw);
4958 else
4959 rc = mwl8k_cmd_radio_enable(hw);
4960 if (rc)
4961 goto out;
4962
4963 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
4964 rc = mwl8k_cmd_set_rf_channel(hw, conf);
4965 if (rc)
4966 goto out;
4967 }
4968
4969 if (conf->power_level > 18)
4970 conf->power_level = 18;
4971
4972 if (priv->ap_fw) {
4973
4974 if (conf->flags & IEEE80211_CONF_CHANGE_POWER) {
4975 rc = mwl8k_cmd_tx_power(hw, conf, conf->power_level);
4976 if (rc)
4977 goto out;
4978 }
4979
4980
4981 } else {
4982 rc = mwl8k_cmd_rf_tx_power(hw, conf->power_level);
4983 if (rc)
4984 goto out;
4985 rc = mwl8k_cmd_mimo_config(hw, 0x7, 0x7);
4986 }
4987
4988 out:
4989 mwl8k_fw_unlock(hw);
4990
4991 return rc;
4992 }
4993
4994 static void
4995 mwl8k_bss_info_changed_sta(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4996 struct ieee80211_bss_conf *info, u32 changed)
4997 {
4998 struct mwl8k_priv *priv = hw->priv;
4999 u32 ap_legacy_rates = 0;
5000 u8 ap_mcs_rates[16];
5001 int rc;
5002
5003 if (mwl8k_fw_lock(hw))
5004 return;
5005
5006 /*
5007 * No need to capture a beacon if we're no longer associated.
5008 */
5009 if ((changed & BSS_CHANGED_ASSOC) && !vif->bss_conf.assoc)
5010 priv->capture_beacon = false;
5011
5012 /*
5013 * Get the AP's legacy and MCS rates.
5014 */
5015 if (vif->bss_conf.assoc) {
5016 struct ieee80211_sta *ap;
5017
5018 rcu_read_lock();
5019
5020 ap = ieee80211_find_sta(vif, vif->bss_conf.bssid);
5021 if (ap == NULL) {
5022 rcu_read_unlock();
5023 goto out;
5024 }
5025
5026 if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ) {
5027 ap_legacy_rates = ap->supp_rates[NL80211_BAND_2GHZ];
5028 } else {
5029 ap_legacy_rates =
5030 ap->supp_rates[NL80211_BAND_5GHZ] << 5;
5031 }
5032 memcpy(ap_mcs_rates, ap->ht_cap.mcs.rx_mask, 16);
5033
5034 rcu_read_unlock();
5035
5036 if (changed & BSS_CHANGED_ASSOC) {
5037 if (!priv->ap_fw) {
5038 rc = mwl8k_cmd_set_rate(hw, vif,
5039 ap_legacy_rates,
5040 ap_mcs_rates);
5041 if (rc)
5042 goto out;
5043
5044 rc = mwl8k_cmd_use_fixed_rate_sta(hw);
5045 if (rc)
5046 goto out;
5047 } else {
5048 int idx;
5049 int rate;
5050
5051 /* Use AP firmware specific rate command.
5052 */
5053 idx = ffs(vif->bss_conf.basic_rates);
5054 if (idx)
5055 idx--;
5056
5057 if (hw->conf.chandef.chan->band ==
5058 NL80211_BAND_2GHZ)
5059 rate = mwl8k_rates_24[idx].hw_value;
5060 else
5061 rate = mwl8k_rates_50[idx].hw_value;
5062
5063 mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate);
5064 }
5065 }
5066 }
5067
5068 if (changed & BSS_CHANGED_ERP_PREAMBLE) {
5069 rc = mwl8k_set_radio_preamble(hw,
5070 vif->bss_conf.use_short_preamble);
5071 if (rc)
5072 goto out;
5073 }
5074
5075 if ((changed & BSS_CHANGED_ERP_SLOT) && !priv->ap_fw) {
5076 rc = mwl8k_cmd_set_slot(hw, vif->bss_conf.use_short_slot);
5077 if (rc)
5078 goto out;
5079 }
5080
5081 if (vif->bss_conf.assoc && !priv->ap_fw &&
5082 (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_CTS_PROT |
5083 BSS_CHANGED_HT))) {
5084 rc = mwl8k_cmd_set_aid(hw, vif, ap_legacy_rates);
5085 if (rc)
5086 goto out;
5087 }
5088
5089 if (vif->bss_conf.assoc &&
5090 (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_BEACON_INT))) {
5091 /*
5092 * Finalize the join. Tell rx handler to process
5093 * next beacon from our BSSID.
5094 */
5095 memcpy(priv->capture_bssid, vif->bss_conf.bssid, ETH_ALEN);
5096 priv->capture_beacon = true;
5097 }
5098
5099 out:
5100 mwl8k_fw_unlock(hw);
5101 }
5102
5103 static void
5104 mwl8k_bss_info_changed_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5105 struct ieee80211_bss_conf *info, u32 changed)
5106 {
5107 int rc;
5108
5109 if (mwl8k_fw_lock(hw))
5110 return;
5111
5112 if (changed & BSS_CHANGED_ERP_PREAMBLE) {
5113 rc = mwl8k_set_radio_preamble(hw,
5114 vif->bss_conf.use_short_preamble);
5115 if (rc)
5116 goto out;
5117 }
5118
5119 if (changed & BSS_CHANGED_BASIC_RATES) {
5120 int idx;
5121 int rate;
5122
5123 /*
5124 * Use lowest supported basic rate for multicasts
5125 * and management frames (such as probe responses --
5126 * beacons will always go out at 1 Mb/s).
5127 */
5128 idx = ffs(vif->bss_conf.basic_rates);
5129 if (idx)
5130 idx--;
5131
5132 if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
5133 rate = mwl8k_rates_24[idx].hw_value;
5134 else
5135 rate = mwl8k_rates_50[idx].hw_value;
5136
5137 mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate);
5138 }
5139
5140 if (changed & (BSS_CHANGED_BEACON_INT | BSS_CHANGED_BEACON)) {
5141 struct sk_buff *skb;
5142
5143 skb = ieee80211_beacon_get(hw, vif);
5144 if (skb != NULL) {
5145 mwl8k_cmd_set_beacon(hw, vif, skb->data, skb->len);
5146 kfree_skb(skb);
5147 }
5148 }
5149
5150 if (changed & BSS_CHANGED_BEACON_ENABLED)
5151 mwl8k_cmd_bss_start(hw, vif, info->enable_beacon);
5152
5153 out:
5154 mwl8k_fw_unlock(hw);
5155 }
5156
5157 static void
5158 mwl8k_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5159 struct ieee80211_bss_conf *info, u32 changed)
5160 {
5161 if (vif->type == NL80211_IFTYPE_STATION)
5162 mwl8k_bss_info_changed_sta(hw, vif, info, changed);
5163 if (vif->type == NL80211_IFTYPE_AP)
5164 mwl8k_bss_info_changed_ap(hw, vif, info, changed);
5165 }
5166
5167 static u64 mwl8k_prepare_multicast(struct ieee80211_hw *hw,
5168 struct netdev_hw_addr_list *mc_list)
5169 {
5170 struct mwl8k_cmd_pkt *cmd;
5171
5172 /*
5173 * Synthesize and return a command packet that programs the
5174 * hardware multicast address filter. At this point we don't
5175 * know whether FIF_ALLMULTI is being requested, but if it is,
5176 * we'll end up throwing this packet away and creating a new
5177 * one in mwl8k_configure_filter().
5178 */
5179 cmd = __mwl8k_cmd_mac_multicast_adr(hw, 0, mc_list);
5180
5181 return (unsigned long)cmd;
5182 }
5183
5184 static int
5185 mwl8k_configure_filter_sniffer(struct ieee80211_hw *hw,
5186 unsigned int changed_flags,
5187 unsigned int *total_flags)
5188 {
5189 struct mwl8k_priv *priv = hw->priv;
5190
5191 /*
5192 * Hardware sniffer mode is mutually exclusive with STA
5193 * operation, so refuse to enable sniffer mode if a STA
5194 * interface is active.
5195 */
5196 if (!list_empty(&priv->vif_list)) {
5197 if (net_ratelimit())
5198 wiphy_info(hw->wiphy,
5199 "not enabling sniffer mode because STA interface is active\n");
5200 return 0;
5201 }
5202
5203 if (!priv->sniffer_enabled) {
5204 if (mwl8k_cmd_enable_sniffer(hw, 1))
5205 return 0;
5206 priv->sniffer_enabled = true;
5207 }
5208
5209 *total_flags &= FIF_ALLMULTI |
5210 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL |
5211 FIF_OTHER_BSS;
5212
5213 return 1;
5214 }
5215
5216 static struct mwl8k_vif *mwl8k_first_vif(struct mwl8k_priv *priv)
5217 {
5218 if (!list_empty(&priv->vif_list))
5219 return list_entry(priv->vif_list.next, struct mwl8k_vif, list);
5220
5221 return NULL;
5222 }
5223
5224 static void mwl8k_configure_filter(struct ieee80211_hw *hw,
5225 unsigned int changed_flags,
5226 unsigned int *total_flags,
5227 u64 multicast)
5228 {
5229 struct mwl8k_priv *priv = hw->priv;
5230 struct mwl8k_cmd_pkt *cmd = (void *)(unsigned long)multicast;
5231
5232 /*
5233 * AP firmware doesn't allow fine-grained control over
5234 * the receive filter.
5235 */
5236 if (priv->ap_fw) {
5237 *total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC;
5238 kfree(cmd);
5239 return;
5240 }
5241
5242 /*
5243 * Enable hardware sniffer mode if FIF_CONTROL or
5244 * FIF_OTHER_BSS is requested.
5245 */
5246 if (*total_flags & (FIF_CONTROL | FIF_OTHER_BSS) &&
5247 mwl8k_configure_filter_sniffer(hw, changed_flags, total_flags)) {
5248 kfree(cmd);
5249 return;
5250 }
5251
5252 /* Clear unsupported feature flags */
5253 *total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC;
5254
5255 if (mwl8k_fw_lock(hw)) {
5256 kfree(cmd);
5257 return;
5258 }
5259
5260 if (priv->sniffer_enabled) {
5261 mwl8k_cmd_enable_sniffer(hw, 0);
5262 priv->sniffer_enabled = false;
5263 }
5264
5265 if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
5266 if (*total_flags & FIF_BCN_PRBRESP_PROMISC) {
5267 /*
5268 * Disable the BSS filter.
5269 */
5270 mwl8k_cmd_set_pre_scan(hw);
5271 } else {
5272 struct mwl8k_vif *mwl8k_vif;
5273 const u8 *bssid;
5274
5275 /*
5276 * Enable the BSS filter.
5277 *
5278 * If there is an active STA interface, use that
5279 * interface's BSSID, otherwise use a dummy one
5280 * (where the OUI part needs to be nonzero for
5281 * the BSSID to be accepted by POST_SCAN).
5282 */
5283 mwl8k_vif = mwl8k_first_vif(priv);
5284 if (mwl8k_vif != NULL)
5285 bssid = mwl8k_vif->vif->bss_conf.bssid;
5286 else
5287 bssid = "\x01\x00\x00\x00\x00\x00";
5288
5289 mwl8k_cmd_set_post_scan(hw, bssid);
5290 }
5291 }
5292
5293 /*
5294 * If FIF_ALLMULTI is being requested, throw away the command
5295 * packet that ->prepare_multicast() built and replace it with
5296 * a command packet that enables reception of all multicast
5297 * packets.
5298 */
5299 if (*total_flags & FIF_ALLMULTI) {
5300 kfree(cmd);
5301 cmd = __mwl8k_cmd_mac_multicast_adr(hw, 1, NULL);
5302 }
5303
5304 if (cmd != NULL) {
5305 mwl8k_post_cmd(hw, cmd);
5306 kfree(cmd);
5307 }
5308
5309 mwl8k_fw_unlock(hw);
5310 }
5311
5312 static int mwl8k_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
5313 {
5314 return mwl8k_cmd_set_rts_threshold(hw, value);
5315 }
5316
5317 static int mwl8k_sta_remove(struct ieee80211_hw *hw,
5318 struct ieee80211_vif *vif,
5319 struct ieee80211_sta *sta)
5320 {
5321 struct mwl8k_priv *priv = hw->priv;
5322
5323 if (priv->ap_fw)
5324 return mwl8k_cmd_set_new_stn_del(hw, vif, sta->addr);
5325 else
5326 return mwl8k_cmd_update_stadb_del(hw, vif, sta->addr);
5327 }
5328
5329 static int mwl8k_sta_add(struct ieee80211_hw *hw,
5330 struct ieee80211_vif *vif,
5331 struct ieee80211_sta *sta)
5332 {
5333 struct mwl8k_priv *priv = hw->priv;
5334 int ret;
5335 int i;
5336 struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
5337 struct ieee80211_key_conf *key;
5338
5339 if (!priv->ap_fw) {
5340 ret = mwl8k_cmd_update_stadb_add(hw, vif, sta);
5341 if (ret >= 0) {
5342 MWL8K_STA(sta)->peer_id = ret;
5343 if (sta->ht_cap.ht_supported)
5344 MWL8K_STA(sta)->is_ampdu_allowed = true;
5345 ret = 0;
5346 }
5347
5348 } else {
5349 ret = mwl8k_cmd_set_new_stn_add(hw, vif, sta);
5350 }
5351
5352 for (i = 0; i < NUM_WEP_KEYS; i++) {
5353 key = IEEE80211_KEY_CONF(mwl8k_vif->wep_key_conf[i].key);
5354 if (mwl8k_vif->wep_key_conf[i].enabled)
5355 mwl8k_set_key(hw, SET_KEY, vif, sta, key);
5356 }
5357 return ret;
5358 }
5359
5360 static int mwl8k_conf_tx(struct ieee80211_hw *hw,
5361 struct ieee80211_vif *vif, u16 queue,
5362 const struct ieee80211_tx_queue_params *params)
5363 {
5364 struct mwl8k_priv *priv = hw->priv;
5365 int rc;
5366
5367 rc = mwl8k_fw_lock(hw);
5368 if (!rc) {
5369 BUG_ON(queue > MWL8K_TX_WMM_QUEUES - 1);
5370 memcpy(&priv->wmm_params[queue], params, sizeof(*params));
5371
5372 if (!priv->wmm_enabled)
5373 rc = mwl8k_cmd_set_wmm_mode(hw, 1);
5374
5375 if (!rc) {
5376 int q = MWL8K_TX_WMM_QUEUES - 1 - queue;
5377 rc = mwl8k_cmd_set_edca_params(hw, q,
5378 params->cw_min,
5379 params->cw_max,
5380 params->aifs,
5381 params->txop);
5382 }
5383
5384 mwl8k_fw_unlock(hw);
5385 }
5386
5387 return rc;
5388 }
5389
5390 static int mwl8k_get_stats(struct ieee80211_hw *hw,
5391 struct ieee80211_low_level_stats *stats)
5392 {
5393 return mwl8k_cmd_get_stat(hw, stats);
5394 }
5395
5396 static int mwl8k_get_survey(struct ieee80211_hw *hw, int idx,
5397 struct survey_info *survey)
5398 {
5399 struct mwl8k_priv *priv = hw->priv;
5400 struct ieee80211_conf *conf = &hw->conf;
5401 struct ieee80211_supported_band *sband;
5402
5403 if (priv->ap_fw) {
5404 sband = hw->wiphy->bands[NL80211_BAND_2GHZ];
5405
5406 if (sband && idx >= sband->n_channels) {
5407 idx -= sband->n_channels;
5408 sband = NULL;
5409 }
5410
5411 if (!sband)
5412 sband = hw->wiphy->bands[NL80211_BAND_5GHZ];
5413
5414 if (!sband || idx >= sband->n_channels)
5415 return -ENOENT;
5416
5417 memcpy(survey, &priv->survey[idx], sizeof(*survey));
5418 survey->channel = &sband->channels[idx];
5419
5420 return 0;
5421 }
5422
5423 if (idx != 0)
5424 return -ENOENT;
5425
5426 survey->channel = conf->chandef.chan;
5427 survey->filled = SURVEY_INFO_NOISE_DBM;
5428 survey->noise = priv->noise;
5429
5430 return 0;
5431 }
5432
5433 #define MAX_AMPDU_ATTEMPTS 5
5434
5435 static int
5436 mwl8k_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5437 struct ieee80211_ampdu_params *params)
5438 {
5439 struct ieee80211_sta *sta = params->sta;
5440 enum ieee80211_ampdu_mlme_action action = params->action;
5441 u16 tid = params->tid;
5442 u16 *ssn = &params->ssn;
5443 u8 buf_size = params->buf_size;
5444 int i, rc = 0;
5445 struct mwl8k_priv *priv = hw->priv;
5446 struct mwl8k_ampdu_stream *stream;
5447 u8 *addr = sta->addr, idx;
5448 struct mwl8k_sta *sta_info = MWL8K_STA(sta);
5449
5450 if (!ieee80211_hw_check(hw, AMPDU_AGGREGATION))
5451 return -ENOTSUPP;
5452
5453 spin_lock(&priv->stream_lock);
5454 stream = mwl8k_lookup_stream(hw, addr, tid);
5455
5456 switch (action) {
5457 case IEEE80211_AMPDU_RX_START:
5458 case IEEE80211_AMPDU_RX_STOP:
5459 break;
5460 case IEEE80211_AMPDU_TX_START:
5461 /* By the time we get here the hw queues may contain outgoing
5462 * packets for this RA/TID that are not part of this BA
5463 * session. The hw will assign sequence numbers to these
5464 * packets as they go out. So if we query the hw for its next
5465 * sequence number and use that for the SSN here, it may end up
5466 * being wrong, which will lead to sequence number mismatch at
5467 * the recipient. To avoid this, we reset the sequence number
5468 * to O for the first MPDU in this BA stream.
5469 */
5470 *ssn = 0;
5471 if (stream == NULL) {
5472 /* This means that somebody outside this driver called
5473 * ieee80211_start_tx_ba_session. This is unexpected
5474 * because we do our own rate control. Just warn and
5475 * move on.
5476 */
5477 wiphy_warn(hw->wiphy, "Unexpected call to %s. "
5478 "Proceeding anyway.\n", __func__);
5479 stream = mwl8k_add_stream(hw, sta, tid);
5480 }
5481 if (stream == NULL) {
5482 wiphy_debug(hw->wiphy, "no free AMPDU streams\n");
5483 rc = -EBUSY;
5484 break;
5485 }
5486 stream->state = AMPDU_STREAM_IN_PROGRESS;
5487
5488 /* Release the lock before we do the time consuming stuff */
5489 spin_unlock(&priv->stream_lock);
5490 for (i = 0; i < MAX_AMPDU_ATTEMPTS; i++) {
5491
5492 /* Check if link is still valid */
5493 if (!sta_info->is_ampdu_allowed) {
5494 spin_lock(&priv->stream_lock);
5495 mwl8k_remove_stream(hw, stream);
5496 spin_unlock(&priv->stream_lock);
5497 return -EBUSY;
5498 }
5499
5500 rc = mwl8k_check_ba(hw, stream, vif);
5501
5502 /* If HW restart is in progress mwl8k_post_cmd will
5503 * return -EBUSY. Avoid retrying mwl8k_check_ba in
5504 * such cases
5505 */
5506 if (!rc || rc == -EBUSY)
5507 break;
5508 /*
5509 * HW queues take time to be flushed, give them
5510 * sufficient time
5511 */
5512
5513 msleep(1000);
5514 }
5515 spin_lock(&priv->stream_lock);
5516 if (rc) {
5517 wiphy_err(hw->wiphy, "Stream for tid %d busy after %d"
5518 " attempts\n", tid, MAX_AMPDU_ATTEMPTS);
5519 mwl8k_remove_stream(hw, stream);
5520 rc = -EBUSY;
5521 break;
5522 }
5523 rc = IEEE80211_AMPDU_TX_START_IMMEDIATE;
5524 break;
5525 case IEEE80211_AMPDU_TX_STOP_CONT:
5526 case IEEE80211_AMPDU_TX_STOP_FLUSH:
5527 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
5528 if (stream) {
5529 if (stream->state == AMPDU_STREAM_ACTIVE) {
5530 idx = stream->idx;
5531 spin_unlock(&priv->stream_lock);
5532 mwl8k_destroy_ba(hw, idx);
5533 spin_lock(&priv->stream_lock);
5534 }
5535 mwl8k_remove_stream(hw, stream);
5536 }
5537 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
5538 break;
5539 case IEEE80211_AMPDU_TX_OPERATIONAL:
5540 BUG_ON(stream == NULL);
5541 BUG_ON(stream->state != AMPDU_STREAM_IN_PROGRESS);
5542 spin_unlock(&priv->stream_lock);
5543 rc = mwl8k_create_ba(hw, stream, buf_size, vif);
5544 spin_lock(&priv->stream_lock);
5545 if (!rc)
5546 stream->state = AMPDU_STREAM_ACTIVE;
5547 else {
5548 idx = stream->idx;
5549 spin_unlock(&priv->stream_lock);
5550 mwl8k_destroy_ba(hw, idx);
5551 spin_lock(&priv->stream_lock);
5552 wiphy_debug(hw->wiphy,
5553 "Failed adding stream for sta %pM tid %d\n",
5554 addr, tid);
5555 mwl8k_remove_stream(hw, stream);
5556 }
5557 break;
5558
5559 default:
5560 rc = -ENOTSUPP;
5561 }
5562
5563 spin_unlock(&priv->stream_lock);
5564 return rc;
5565 }
5566
5567 static void mwl8k_sw_scan_start(struct ieee80211_hw *hw,
5568 struct ieee80211_vif *vif,
5569 const u8 *mac_addr)
5570 {
5571 struct mwl8k_priv *priv = hw->priv;
5572 u8 tmp;
5573
5574 if (!priv->ap_fw)
5575 return;
5576
5577 /* clear all stats */
5578 priv->channel_time = 0;
5579 ioread32(priv->regs + BBU_RXRDY_CNT_REG);
5580 ioread32(priv->regs + NOK_CCA_CNT_REG);
5581 mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &tmp);
5582
5583 priv->sw_scan_start = true;
5584 }
5585
5586 static void mwl8k_sw_scan_complete(struct ieee80211_hw *hw,
5587 struct ieee80211_vif *vif)
5588 {
5589 struct mwl8k_priv *priv = hw->priv;
5590 u8 tmp;
5591
5592 if (!priv->ap_fw)
5593 return;
5594
5595 priv->sw_scan_start = false;
5596
5597 /* clear all stats */
5598 priv->channel_time = 0;
5599 ioread32(priv->regs + BBU_RXRDY_CNT_REG);
5600 ioread32(priv->regs + NOK_CCA_CNT_REG);
5601 mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &tmp);
5602 }
5603
5604 static const struct ieee80211_ops mwl8k_ops = {
5605 .tx = mwl8k_tx,
5606 .start = mwl8k_start,
5607 .stop = mwl8k_stop,
5608 .add_interface = mwl8k_add_interface,
5609 .remove_interface = mwl8k_remove_interface,
5610 .config = mwl8k_config,
5611 .bss_info_changed = mwl8k_bss_info_changed,
5612 .prepare_multicast = mwl8k_prepare_multicast,
5613 .configure_filter = mwl8k_configure_filter,
5614 .set_key = mwl8k_set_key,
5615 .set_rts_threshold = mwl8k_set_rts_threshold,
5616 .sta_add = mwl8k_sta_add,
5617 .sta_remove = mwl8k_sta_remove,
5618 .conf_tx = mwl8k_conf_tx,
5619 .get_stats = mwl8k_get_stats,
5620 .get_survey = mwl8k_get_survey,
5621 .ampdu_action = mwl8k_ampdu_action,
5622 .sw_scan_start = mwl8k_sw_scan_start,
5623 .sw_scan_complete = mwl8k_sw_scan_complete,
5624 };
5625
5626 static void mwl8k_finalize_join_worker(struct work_struct *work)
5627 {
5628 struct mwl8k_priv *priv =
5629 container_of(work, struct mwl8k_priv, finalize_join_worker);
5630 struct sk_buff *skb = priv->beacon_skb;
5631 struct ieee80211_mgmt *mgmt = (void *)skb->data;
5632 int len = skb->len - offsetof(struct ieee80211_mgmt, u.beacon.variable);
5633 const u8 *tim = cfg80211_find_ie(WLAN_EID_TIM,
5634 mgmt->u.beacon.variable, len);
5635 int dtim_period = 1;
5636
5637 if (tim && tim[1] >= 2)
5638 dtim_period = tim[3];
5639
5640 mwl8k_cmd_finalize_join(priv->hw, skb->data, skb->len, dtim_period);
5641
5642 dev_kfree_skb(skb);
5643 priv->beacon_skb = NULL;
5644 }
5645
5646 enum {
5647 MWL8363 = 0,
5648 MWL8687,
5649 MWL8366,
5650 MWL8764,
5651 };
5652
5653 #define MWL8K_8366_AP_FW_API 3
5654 #define _MWL8K_8366_AP_FW(api) "mwl8k/fmimage_8366_ap-" #api ".fw"
5655 #define MWL8K_8366_AP_FW(api) _MWL8K_8366_AP_FW(api)
5656
5657 #define MWL8K_8764_AP_FW_API 1
5658 #define _MWL8K_8764_AP_FW(api) "mwl8k/fmimage_8764_ap-" #api ".fw"
5659 #define MWL8K_8764_AP_FW(api) _MWL8K_8764_AP_FW(api)
5660
5661 static struct mwl8k_device_info mwl8k_info_tbl[] = {
5662 [MWL8363] = {
5663 .part_name = "88w8363",
5664 .helper_image = "mwl8k/helper_8363.fw",
5665 .fw_image_sta = "mwl8k/fmimage_8363.fw",
5666 },
5667 [MWL8687] = {
5668 .part_name = "88w8687",
5669 .helper_image = "mwl8k/helper_8687.fw",
5670 .fw_image_sta = "mwl8k/fmimage_8687.fw",
5671 },
5672 [MWL8366] = {
5673 .part_name = "88w8366",
5674 .helper_image = "mwl8k/helper_8366.fw",
5675 .fw_image_sta = "mwl8k/fmimage_8366.fw",
5676 .fw_image_ap = MWL8K_8366_AP_FW(MWL8K_8366_AP_FW_API),
5677 .fw_api_ap = MWL8K_8366_AP_FW_API,
5678 .ap_rxd_ops = &rxd_ap_ops,
5679 },
5680 [MWL8764] = {
5681 .part_name = "88w8764",
5682 .fw_image_ap = MWL8K_8764_AP_FW(MWL8K_8764_AP_FW_API),
5683 .fw_api_ap = MWL8K_8764_AP_FW_API,
5684 .ap_rxd_ops = &rxd_ap_ops,
5685 },
5686 };
5687
5688 MODULE_FIRMWARE("mwl8k/helper_8363.fw");
5689 MODULE_FIRMWARE("mwl8k/fmimage_8363.fw");
5690 MODULE_FIRMWARE("mwl8k/helper_8687.fw");
5691 MODULE_FIRMWARE("mwl8k/fmimage_8687.fw");
5692 MODULE_FIRMWARE("mwl8k/helper_8366.fw");
5693 MODULE_FIRMWARE("mwl8k/fmimage_8366.fw");
5694 MODULE_FIRMWARE(MWL8K_8366_AP_FW(MWL8K_8366_AP_FW_API));
5695
5696 static const struct pci_device_id mwl8k_pci_id_table[] = {
5697 { PCI_VDEVICE(MARVELL, 0x2a0a), .driver_data = MWL8363, },
5698 { PCI_VDEVICE(MARVELL, 0x2a0c), .driver_data = MWL8363, },
5699 { PCI_VDEVICE(MARVELL, 0x2a24), .driver_data = MWL8363, },
5700 { PCI_VDEVICE(MARVELL, 0x2a2b), .driver_data = MWL8687, },
5701 { PCI_VDEVICE(MARVELL, 0x2a30), .driver_data = MWL8687, },
5702 { PCI_VDEVICE(MARVELL, 0x2a40), .driver_data = MWL8366, },
5703 { PCI_VDEVICE(MARVELL, 0x2a41), .driver_data = MWL8366, },
5704 { PCI_VDEVICE(MARVELL, 0x2a42), .driver_data = MWL8366, },
5705 { PCI_VDEVICE(MARVELL, 0x2a43), .driver_data = MWL8366, },
5706 { PCI_VDEVICE(MARVELL, 0x2b36), .driver_data = MWL8764, },
5707 { },
5708 };
5709 MODULE_DEVICE_TABLE(pci, mwl8k_pci_id_table);
5710
5711 static int mwl8k_request_alt_fw(struct mwl8k_priv *priv)
5712 {
5713 int rc;
5714 printk(KERN_ERR "%s: Error requesting preferred fw %s.\n"
5715 "Trying alternative firmware %s\n", pci_name(priv->pdev),
5716 priv->fw_pref, priv->fw_alt);
5717 rc = mwl8k_request_fw(priv, priv->fw_alt, &priv->fw_ucode, true);
5718 if (rc) {
5719 printk(KERN_ERR "%s: Error requesting alt fw %s\n",
5720 pci_name(priv->pdev), priv->fw_alt);
5721 return rc;
5722 }
5723 return 0;
5724 }
5725
5726 static int mwl8k_firmware_load_success(struct mwl8k_priv *priv);
5727 static void mwl8k_fw_state_machine(const struct firmware *fw, void *context)
5728 {
5729 struct mwl8k_priv *priv = context;
5730 struct mwl8k_device_info *di = priv->device_info;
5731 int rc;
5732
5733 switch (priv->fw_state) {
5734 case FW_STATE_INIT:
5735 if (!fw) {
5736 printk(KERN_ERR "%s: Error requesting helper fw %s\n",
5737 pci_name(priv->pdev), di->helper_image);
5738 goto fail;
5739 }
5740 priv->fw_helper = fw;
5741 rc = mwl8k_request_fw(priv, priv->fw_pref, &priv->fw_ucode,
5742 true);
5743 if (rc && priv->fw_alt) {
5744 rc = mwl8k_request_alt_fw(priv);
5745 if (rc)
5746 goto fail;
5747 priv->fw_state = FW_STATE_LOADING_ALT;
5748 } else if (rc)
5749 goto fail;
5750 else
5751 priv->fw_state = FW_STATE_LOADING_PREF;
5752 break;
5753
5754 case FW_STATE_LOADING_PREF:
5755 if (!fw) {
5756 if (priv->fw_alt) {
5757 rc = mwl8k_request_alt_fw(priv);
5758 if (rc)
5759 goto fail;
5760 priv->fw_state = FW_STATE_LOADING_ALT;
5761 } else
5762 goto fail;
5763 } else {
5764 priv->fw_ucode = fw;
5765 rc = mwl8k_firmware_load_success(priv);
5766 if (rc)
5767 goto fail;
5768 else
5769 complete(&priv->firmware_loading_complete);
5770 }
5771 break;
5772
5773 case FW_STATE_LOADING_ALT:
5774 if (!fw) {
5775 printk(KERN_ERR "%s: Error requesting alt fw %s\n",
5776 pci_name(priv->pdev), di->helper_image);
5777 goto fail;
5778 }
5779 priv->fw_ucode = fw;
5780 rc = mwl8k_firmware_load_success(priv);
5781 if (rc)
5782 goto fail;
5783 else
5784 complete(&priv->firmware_loading_complete);
5785 break;
5786
5787 default:
5788 printk(KERN_ERR "%s: Unexpected firmware loading state: %d\n",
5789 MWL8K_NAME, priv->fw_state);
5790 BUG_ON(1);
5791 }
5792
5793 return;
5794
5795 fail:
5796 priv->fw_state = FW_STATE_ERROR;
5797 complete(&priv->firmware_loading_complete);
5798 device_release_driver(&priv->pdev->dev);
5799 mwl8k_release_firmware(priv);
5800 }
5801
5802 #define MAX_RESTART_ATTEMPTS 1
5803 static int mwl8k_init_firmware(struct ieee80211_hw *hw, char *fw_image,
5804 bool nowait)
5805 {
5806 struct mwl8k_priv *priv = hw->priv;
5807 int rc;
5808 int count = MAX_RESTART_ATTEMPTS;
5809
5810 retry:
5811 /* Reset firmware and hardware */
5812 mwl8k_hw_reset(priv);
5813
5814 /* Ask userland hotplug daemon for the device firmware */
5815 rc = mwl8k_request_firmware(priv, fw_image, nowait);
5816 if (rc) {
5817 wiphy_err(hw->wiphy, "Firmware files not found\n");
5818 return rc;
5819 }
5820
5821 if (nowait)
5822 return rc;
5823
5824 /* Load firmware into hardware */
5825 rc = mwl8k_load_firmware(hw);
5826 if (rc)
5827 wiphy_err(hw->wiphy, "Cannot start firmware\n");
5828
5829 /* Reclaim memory once firmware is successfully loaded */
5830 mwl8k_release_firmware(priv);
5831
5832 if (rc && count) {
5833 /* FW did not start successfully;
5834 * lets try one more time
5835 */
5836 count--;
5837 wiphy_err(hw->wiphy, "Trying to reload the firmware again\n");
5838 msleep(20);
5839 goto retry;
5840 }
5841
5842 return rc;
5843 }
5844
5845 static int mwl8k_init_txqs(struct ieee80211_hw *hw)
5846 {
5847 struct mwl8k_priv *priv = hw->priv;
5848 int rc = 0;
5849 int i;
5850
5851 for (i = 0; i < mwl8k_tx_queues(priv); i++) {
5852 rc = mwl8k_txq_init(hw, i);
5853 if (rc)
5854 break;
5855 if (priv->ap_fw)
5856 iowrite32(priv->txq[i].txd_dma,
5857 priv->sram + priv->txq_offset[i]);
5858 }
5859 return rc;
5860 }
5861
5862 /* initialize hw after successfully loading a firmware image */
5863 static int mwl8k_probe_hw(struct ieee80211_hw *hw)
5864 {
5865 struct mwl8k_priv *priv = hw->priv;
5866 int rc = 0;
5867 int i;
5868
5869 if (priv->ap_fw) {
5870 priv->rxd_ops = priv->device_info->ap_rxd_ops;
5871 if (priv->rxd_ops == NULL) {
5872 wiphy_err(hw->wiphy,
5873 "Driver does not have AP firmware image support for this hardware\n");
5874 rc = -ENOENT;
5875 goto err_stop_firmware;
5876 }
5877 } else {
5878 priv->rxd_ops = &rxd_sta_ops;
5879 }
5880
5881 priv->sniffer_enabled = false;
5882 priv->wmm_enabled = false;
5883 priv->pending_tx_pkts = 0;
5884 atomic_set(&priv->watchdog_event_pending, 0);
5885
5886 rc = mwl8k_rxq_init(hw, 0);
5887 if (rc)
5888 goto err_stop_firmware;
5889 rxq_refill(hw, 0, INT_MAX);
5890
5891 /* For the sta firmware, we need to know the dma addresses of tx queues
5892 * before sending MWL8K_CMD_GET_HW_SPEC. So we must initialize them
5893 * prior to issuing this command. But for the AP case, we learn the
5894 * total number of queues from the result CMD_GET_HW_SPEC, so for this
5895 * case we must initialize the tx queues after.
5896 */
5897 priv->num_ampdu_queues = 0;
5898 if (!priv->ap_fw) {
5899 rc = mwl8k_init_txqs(hw);
5900 if (rc)
5901 goto err_free_queues;
5902 }
5903
5904 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
5905 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5906 iowrite32(MWL8K_A2H_INT_TX_DONE|MWL8K_A2H_INT_RX_READY|
5907 MWL8K_A2H_INT_BA_WATCHDOG,
5908 priv->regs + MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL);
5909 iowrite32(MWL8K_A2H_INT_OPC_DONE,
5910 priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
5911
5912 rc = request_irq(priv->pdev->irq, mwl8k_interrupt,
5913 IRQF_SHARED, MWL8K_NAME, hw);
5914 if (rc) {
5915 wiphy_err(hw->wiphy, "failed to register IRQ handler\n");
5916 goto err_free_queues;
5917 }
5918
5919 /*
5920 * When hw restart is requested,
5921 * mac80211 will take care of clearing
5922 * the ampdu streams, so do not clear
5923 * the ampdu state here
5924 */
5925 if (!priv->hw_restart_in_progress)
5926 memset(priv->ampdu, 0, sizeof(priv->ampdu));
5927
5928 /*
5929 * Temporarily enable interrupts. Initial firmware host
5930 * commands use interrupts and avoid polling. Disable
5931 * interrupts when done.
5932 */
5933 iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5934
5935 /* Get config data, mac addrs etc */
5936 if (priv->ap_fw) {
5937 rc = mwl8k_cmd_get_hw_spec_ap(hw);
5938 if (!rc)
5939 rc = mwl8k_init_txqs(hw);
5940 if (!rc)
5941 rc = mwl8k_cmd_set_hw_spec(hw);
5942 } else {
5943 rc = mwl8k_cmd_get_hw_spec_sta(hw);
5944 }
5945 if (rc) {
5946 wiphy_err(hw->wiphy, "Cannot initialise firmware\n");
5947 goto err_free_irq;
5948 }
5949
5950 /* Turn radio off */
5951 rc = mwl8k_cmd_radio_disable(hw);
5952 if (rc) {
5953 wiphy_err(hw->wiphy, "Cannot disable\n");
5954 goto err_free_irq;
5955 }
5956
5957 /* Clear MAC address */
5958 rc = mwl8k_cmd_set_mac_addr(hw, NULL, "\x00\x00\x00\x00\x00\x00");
5959 if (rc) {
5960 wiphy_err(hw->wiphy, "Cannot clear MAC address\n");
5961 goto err_free_irq;
5962 }
5963
5964 /* Configure Antennas */
5965 rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_RX, 0x3);
5966 if (rc)
5967 wiphy_warn(hw->wiphy, "failed to set # of RX antennas");
5968 rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_TX, 0x7);
5969 if (rc)
5970 wiphy_warn(hw->wiphy, "failed to set # of TX antennas");
5971
5972
5973 /* Disable interrupts */
5974 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5975 free_irq(priv->pdev->irq, hw);
5976
5977 wiphy_info(hw->wiphy, "%s v%d, %pm, %s firmware %u.%u.%u.%u\n",
5978 priv->device_info->part_name,
5979 priv->hw_rev, hw->wiphy->perm_addr,
5980 priv->ap_fw ? "AP" : "STA",
5981 (priv->fw_rev >> 24) & 0xff, (priv->fw_rev >> 16) & 0xff,
5982 (priv->fw_rev >> 8) & 0xff, priv->fw_rev & 0xff);
5983
5984 return 0;
5985
5986 err_free_irq:
5987 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5988 free_irq(priv->pdev->irq, hw);
5989
5990 err_free_queues:
5991 for (i = 0; i < mwl8k_tx_queues(priv); i++)
5992 mwl8k_txq_deinit(hw, i);
5993 mwl8k_rxq_deinit(hw, 0);
5994
5995 err_stop_firmware:
5996 mwl8k_hw_reset(priv);
5997
5998 return rc;
5999 }
6000
6001 /*
6002 * invoke mwl8k_reload_firmware to change the firmware image after the device
6003 * has already been registered
6004 */
6005 static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image)
6006 {
6007 int i, rc = 0;
6008 struct mwl8k_priv *priv = hw->priv;
6009 struct mwl8k_vif *vif, *tmp_vif;
6010
6011 mwl8k_stop(hw);
6012 mwl8k_rxq_deinit(hw, 0);
6013
6014 /*
6015 * All the existing interfaces are re-added by the ieee80211_reconfig;
6016 * which means driver should remove existing interfaces before calling
6017 * ieee80211_restart_hw
6018 */
6019 if (priv->hw_restart_in_progress)
6020 list_for_each_entry_safe(vif, tmp_vif, &priv->vif_list, list)
6021 mwl8k_remove_vif(priv, vif);
6022
6023 for (i = 0; i < mwl8k_tx_queues(priv); i++)
6024 mwl8k_txq_deinit(hw, i);
6025
6026 rc = mwl8k_init_firmware(hw, fw_image, false);
6027 if (rc)
6028 goto fail;
6029
6030 rc = mwl8k_probe_hw(hw);
6031 if (rc)
6032 goto fail;
6033
6034 if (priv->hw_restart_in_progress)
6035 return rc;
6036
6037 rc = mwl8k_start(hw);
6038 if (rc)
6039 goto fail;
6040
6041 rc = mwl8k_config(hw, ~0);
6042 if (rc)
6043 goto fail;
6044
6045 for (i = 0; i < MWL8K_TX_WMM_QUEUES; i++) {
6046 rc = mwl8k_conf_tx(hw, NULL, i, &priv->wmm_params[i]);
6047 if (rc)
6048 goto fail;
6049 }
6050
6051 return rc;
6052
6053 fail:
6054 printk(KERN_WARNING "mwl8k: Failed to reload firmware image.\n");
6055 return rc;
6056 }
6057
6058 static const struct ieee80211_iface_limit ap_if_limits[] = {
6059 { .max = 8, .types = BIT(NL80211_IFTYPE_AP) },
6060 { .max = 1, .types = BIT(NL80211_IFTYPE_STATION) },
6061 };
6062
6063 static const struct ieee80211_iface_combination ap_if_comb = {
6064 .limits = ap_if_limits,
6065 .n_limits = ARRAY_SIZE(ap_if_limits),
6066 .max_interfaces = 8,
6067 .num_different_channels = 1,
6068 };
6069
6070
6071 static int mwl8k_firmware_load_success(struct mwl8k_priv *priv)
6072 {
6073 struct ieee80211_hw *hw = priv->hw;
6074 int i, rc;
6075
6076 rc = mwl8k_load_firmware(hw);
6077 mwl8k_release_firmware(priv);
6078 if (rc) {
6079 wiphy_err(hw->wiphy, "Cannot start firmware\n");
6080 return rc;
6081 }
6082
6083 /*
6084 * Extra headroom is the size of the required DMA header
6085 * minus the size of the smallest 802.11 frame (CTS frame).
6086 */
6087 hw->extra_tx_headroom =
6088 sizeof(struct mwl8k_dma_data) - sizeof(struct ieee80211_cts);
6089
6090 hw->extra_tx_headroom -= priv->ap_fw ? REDUCED_TX_HEADROOM : 0;
6091
6092 hw->queues = MWL8K_TX_WMM_QUEUES;
6093
6094 /* Set rssi values to dBm */
6095 ieee80211_hw_set(hw, SIGNAL_DBM);
6096 ieee80211_hw_set(hw, HAS_RATE_CONTROL);
6097
6098 /*
6099 * Ask mac80211 to not to trigger PS mode
6100 * based on PM bit of incoming frames.
6101 */
6102 if (priv->ap_fw)
6103 ieee80211_hw_set(hw, AP_LINK_PS);
6104
6105 hw->vif_data_size = sizeof(struct mwl8k_vif);
6106 hw->sta_data_size = sizeof(struct mwl8k_sta);
6107
6108 priv->macids_used = 0;
6109 INIT_LIST_HEAD(&priv->vif_list);
6110
6111 /* Set default radio state and preamble */
6112 priv->radio_on = false;
6113 priv->radio_short_preamble = false;
6114
6115 /* Finalize join worker */
6116 INIT_WORK(&priv->finalize_join_worker, mwl8k_finalize_join_worker);
6117 /* Handle watchdog ba events */
6118 INIT_WORK(&priv->watchdog_ba_handle, mwl8k_watchdog_ba_events);
6119 /* To reload the firmware if it crashes */
6120 INIT_WORK(&priv->fw_reload, mwl8k_hw_restart_work);
6121
6122 /* TX reclaim and RX tasklets. */
6123 tasklet_init(&priv->poll_tx_task, mwl8k_tx_poll, (unsigned long)hw);
6124 tasklet_disable(&priv->poll_tx_task);
6125 tasklet_init(&priv->poll_rx_task, mwl8k_rx_poll, (unsigned long)hw);
6126 tasklet_disable(&priv->poll_rx_task);
6127
6128 /* Power management cookie */
6129 priv->cookie = pci_alloc_consistent(priv->pdev, 4, &priv->cookie_dma);
6130 if (priv->cookie == NULL)
6131 return -ENOMEM;
6132
6133 mutex_init(&priv->fw_mutex);
6134 priv->fw_mutex_owner = NULL;
6135 priv->fw_mutex_depth = 0;
6136 priv->hostcmd_wait = NULL;
6137
6138 spin_lock_init(&priv->tx_lock);
6139
6140 spin_lock_init(&priv->stream_lock);
6141
6142 priv->tx_wait = NULL;
6143
6144 rc = mwl8k_probe_hw(hw);
6145 if (rc)
6146 goto err_free_cookie;
6147
6148 hw->wiphy->interface_modes = 0;
6149
6150 if (priv->ap_macids_supported || priv->device_info->fw_image_ap) {
6151 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP);
6152 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION);
6153 hw->wiphy->iface_combinations = &ap_if_comb;
6154 hw->wiphy->n_iface_combinations = 1;
6155 }
6156
6157 if (priv->sta_macids_supported || priv->device_info->fw_image_sta)
6158 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION);
6159
6160 wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
6161
6162 rc = ieee80211_register_hw(hw);
6163 if (rc) {
6164 wiphy_err(hw->wiphy, "Cannot register device\n");
6165 goto err_unprobe_hw;
6166 }
6167
6168 return 0;
6169
6170 err_unprobe_hw:
6171 for (i = 0; i < mwl8k_tx_queues(priv); i++)
6172 mwl8k_txq_deinit(hw, i);
6173 mwl8k_rxq_deinit(hw, 0);
6174
6175 err_free_cookie:
6176 if (priv->cookie != NULL)
6177 pci_free_consistent(priv->pdev, 4,
6178 priv->cookie, priv->cookie_dma);
6179
6180 return rc;
6181 }
6182 static int mwl8k_probe(struct pci_dev *pdev,
6183 const struct pci_device_id *id)
6184 {
6185 static int printed_version;
6186 struct ieee80211_hw *hw;
6187 struct mwl8k_priv *priv;
6188 struct mwl8k_device_info *di;
6189 int rc;
6190
6191 if (!printed_version) {
6192 printk(KERN_INFO "%s version %s\n", MWL8K_DESC, MWL8K_VERSION);
6193 printed_version = 1;
6194 }
6195
6196
6197 rc = pci_enable_device(pdev);
6198 if (rc) {
6199 printk(KERN_ERR "%s: Cannot enable new PCI device\n",
6200 MWL8K_NAME);
6201 return rc;
6202 }
6203
6204 rc = pci_request_regions(pdev, MWL8K_NAME);
6205 if (rc) {
6206 printk(KERN_ERR "%s: Cannot obtain PCI resources\n",
6207 MWL8K_NAME);
6208 goto err_disable_device;
6209 }
6210
6211 pci_set_master(pdev);
6212
6213
6214 hw = ieee80211_alloc_hw(sizeof(*priv), &mwl8k_ops);
6215 if (hw == NULL) {
6216 printk(KERN_ERR "%s: ieee80211 alloc failed\n", MWL8K_NAME);
6217 rc = -ENOMEM;
6218 goto err_free_reg;
6219 }
6220
6221 SET_IEEE80211_DEV(hw, &pdev->dev);
6222 pci_set_drvdata(pdev, hw);
6223
6224 priv = hw->priv;
6225 priv->hw = hw;
6226 priv->pdev = pdev;
6227 priv->device_info = &mwl8k_info_tbl[id->driver_data];
6228
6229 if (id->driver_data == MWL8764)
6230 priv->is_8764 = true;
6231
6232 priv->sram = pci_iomap(pdev, 0, 0x10000);
6233 if (priv->sram == NULL) {
6234 wiphy_err(hw->wiphy, "Cannot map device SRAM\n");
6235 rc = -EIO;
6236 goto err_iounmap;
6237 }
6238
6239 /*
6240 * If BAR0 is a 32 bit BAR, the register BAR will be BAR1.
6241 * If BAR0 is a 64 bit BAR, the register BAR will be BAR2.
6242 */
6243 priv->regs = pci_iomap(pdev, 1, 0x10000);
6244 if (priv->regs == NULL) {
6245 priv->regs = pci_iomap(pdev, 2, 0x10000);
6246 if (priv->regs == NULL) {
6247 wiphy_err(hw->wiphy, "Cannot map device registers\n");
6248 rc = -EIO;
6249 goto err_iounmap;
6250 }
6251 }
6252
6253 /*
6254 * Choose the initial fw image depending on user input. If a second
6255 * image is available, make it the alternative image that will be
6256 * loaded if the first one fails.
6257 */
6258 init_completion(&priv->firmware_loading_complete);
6259 di = priv->device_info;
6260 if (ap_mode_default && di->fw_image_ap) {
6261 priv->fw_pref = di->fw_image_ap;
6262 priv->fw_alt = di->fw_image_sta;
6263 } else if (!ap_mode_default && di->fw_image_sta) {
6264 priv->fw_pref = di->fw_image_sta;
6265 priv->fw_alt = di->fw_image_ap;
6266 } else if (ap_mode_default && !di->fw_image_ap && di->fw_image_sta) {
6267 printk(KERN_WARNING "AP fw is unavailable. Using STA fw.");
6268 priv->fw_pref = di->fw_image_sta;
6269 } else if (!ap_mode_default && !di->fw_image_sta && di->fw_image_ap) {
6270 printk(KERN_WARNING "STA fw is unavailable. Using AP fw.");
6271 priv->fw_pref = di->fw_image_ap;
6272 }
6273 rc = mwl8k_init_firmware(hw, priv->fw_pref, true);
6274 if (rc)
6275 goto err_stop_firmware;
6276
6277 priv->hw_restart_in_progress = false;
6278
6279 priv->running_bsses = 0;
6280
6281 return rc;
6282
6283 err_stop_firmware:
6284 mwl8k_hw_reset(priv);
6285
6286 err_iounmap:
6287 if (priv->regs != NULL)
6288 pci_iounmap(pdev, priv->regs);
6289
6290 if (priv->sram != NULL)
6291 pci_iounmap(pdev, priv->sram);
6292
6293 ieee80211_free_hw(hw);
6294
6295 err_free_reg:
6296 pci_release_regions(pdev);
6297
6298 err_disable_device:
6299 pci_disable_device(pdev);
6300
6301 return rc;
6302 }
6303
6304 static void mwl8k_remove(struct pci_dev *pdev)
6305 {
6306 struct ieee80211_hw *hw = pci_get_drvdata(pdev);
6307 struct mwl8k_priv *priv;
6308 int i;
6309
6310 if (hw == NULL)
6311 return;
6312 priv = hw->priv;
6313
6314 wait_for_completion(&priv->firmware_loading_complete);
6315
6316 if (priv->fw_state == FW_STATE_ERROR) {
6317 mwl8k_hw_reset(priv);
6318 goto unmap;
6319 }
6320
6321 ieee80211_stop_queues(hw);
6322
6323 ieee80211_unregister_hw(hw);
6324
6325 /* Remove TX reclaim and RX tasklets. */
6326 tasklet_kill(&priv->poll_tx_task);
6327 tasklet_kill(&priv->poll_rx_task);
6328
6329 /* Stop hardware */
6330 mwl8k_hw_reset(priv);
6331
6332 /* Return all skbs to mac80211 */
6333 for (i = 0; i < mwl8k_tx_queues(priv); i++)
6334 mwl8k_txq_reclaim(hw, i, INT_MAX, 1);
6335
6336 for (i = 0; i < mwl8k_tx_queues(priv); i++)
6337 mwl8k_txq_deinit(hw, i);
6338
6339 mwl8k_rxq_deinit(hw, 0);
6340
6341 pci_free_consistent(priv->pdev, 4, priv->cookie, priv->cookie_dma);
6342
6343 unmap:
6344 pci_iounmap(pdev, priv->regs);
6345 pci_iounmap(pdev, priv->sram);
6346 ieee80211_free_hw(hw);
6347 pci_release_regions(pdev);
6348 pci_disable_device(pdev);
6349 }
6350
6351 static struct pci_driver mwl8k_driver = {
6352 .name = MWL8K_NAME,
6353 .id_table = mwl8k_pci_id_table,
6354 .probe = mwl8k_probe,
6355 .remove = mwl8k_remove,
6356 };
6357
6358 module_pci_driver(mwl8k_driver);
6359
6360 MODULE_DESCRIPTION(MWL8K_DESC);
6361 MODULE_VERSION(MWL8K_VERSION);
6362 MODULE_AUTHOR("Lennert Buytenhek <buytenh@marvell.com>");
6363 MODULE_LICENSE("GPL");
Linux with added FPC-III support