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Merge tag 'block-5.11-2021-01-10' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / drivers / net / wireless / marvell / mwl8k.c
blobabf3b0233ccce6f23b56bba295bbe8e5a4b5e1f4
1 /*
2 * drivers/net/wireless/mwl8k.c
3 * Driver for Marvell TOPDOG 802.11 Wireless cards
4 *
5 * Copyright (C) 2008, 2009, 2010 Marvell Semiconductor Inc.
6 *
7 * This file is licensed under the terms of the GNU General Public
8 * License version 2. This program is licensed "as is" without any
9 * warranty of any kind, whether express or implied.
10 */
11
12 #include <linux/interrupt.h>
13 #include <linux/module.h>
14 #include <linux/kernel.h>
15 #include <linux/sched.h>
16 #include <linux/spinlock.h>
17 #include <linux/list.h>
18 #include <linux/pci.h>
19 #include <linux/delay.h>
20 #include <linux/completion.h>
21 #include <linux/etherdevice.h>
22 #include <linux/slab.h>
23 #include <net/mac80211.h>
24 #include <linux/moduleparam.h>
25 #include <linux/firmware.h>
26 #include <linux/workqueue.h>
27
28 #define MWL8K_DESC "Marvell TOPDOG(R) 802.11 Wireless Network Driver"
29 #define MWL8K_NAME KBUILD_MODNAME
30 #define MWL8K_VERSION "0.13"
31
32 /* Module parameters */
33 static bool ap_mode_default;
34 module_param(ap_mode_default, bool, 0);
35 MODULE_PARM_DESC(ap_mode_default,
36 "Set to 1 to make ap mode the default instead of sta mode");
37
38 /* Register definitions */
39 #define MWL8K_HIU_GEN_PTR 0x00000c10
40 #define MWL8K_MODE_STA 0x0000005a
41 #define MWL8K_MODE_AP 0x000000a5
42 #define MWL8K_HIU_INT_CODE 0x00000c14
43 #define MWL8K_FWSTA_READY 0xf0f1f2f4
44 #define MWL8K_FWAP_READY 0xf1f2f4a5
45 #define MWL8K_INT_CODE_CMD_FINISHED 0x00000005
46 #define MWL8K_HIU_SCRATCH 0x00000c40
47
48 /* Host->device communications */
49 #define MWL8K_HIU_H2A_INTERRUPT_EVENTS 0x00000c18
50 #define MWL8K_HIU_H2A_INTERRUPT_STATUS 0x00000c1c
51 #define MWL8K_HIU_H2A_INTERRUPT_MASK 0x00000c20
52 #define MWL8K_HIU_H2A_INTERRUPT_CLEAR_SEL 0x00000c24
53 #define MWL8K_HIU_H2A_INTERRUPT_STATUS_MASK 0x00000c28
54 #define MWL8K_H2A_INT_DUMMY (1 << 20)
55 #define MWL8K_H2A_INT_RESET (1 << 15)
56 #define MWL8K_H2A_INT_DOORBELL (1 << 1)
57 #define MWL8K_H2A_INT_PPA_READY (1 << 0)
58
59 /* Device->host communications */
60 #define MWL8K_HIU_A2H_INTERRUPT_EVENTS 0x00000c2c
61 #define MWL8K_HIU_A2H_INTERRUPT_STATUS 0x00000c30
62 #define MWL8K_HIU_A2H_INTERRUPT_MASK 0x00000c34
63 #define MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL 0x00000c38
64 #define MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK 0x00000c3c
65 #define MWL8K_A2H_INT_DUMMY (1 << 20)
66 #define MWL8K_A2H_INT_BA_WATCHDOG (1 << 14)
67 #define MWL8K_A2H_INT_CHNL_SWITCHED (1 << 11)
68 #define MWL8K_A2H_INT_QUEUE_EMPTY (1 << 10)
69 #define MWL8K_A2H_INT_RADAR_DETECT (1 << 7)
70 #define MWL8K_A2H_INT_RADIO_ON (1 << 6)
71 #define MWL8K_A2H_INT_RADIO_OFF (1 << 5)
72 #define MWL8K_A2H_INT_MAC_EVENT (1 << 3)
73 #define MWL8K_A2H_INT_OPC_DONE (1 << 2)
74 #define MWL8K_A2H_INT_RX_READY (1 << 1)
75 #define MWL8K_A2H_INT_TX_DONE (1 << 0)
76
77 /* HW micro second timer register
78 * located at offset 0xA600. This
79 * will be used to timestamp tx
80 * packets.
81 */
82
83 #define MWL8K_HW_TIMER_REGISTER 0x0000a600
84 #define BBU_RXRDY_CNT_REG 0x0000a860
85 #define NOK_CCA_CNT_REG 0x0000a6a0
86 #define BBU_AVG_NOISE_VAL 0x67
87
88 #define MWL8K_A2H_EVENTS (MWL8K_A2H_INT_DUMMY | \
89 MWL8K_A2H_INT_CHNL_SWITCHED | \
90 MWL8K_A2H_INT_QUEUE_EMPTY | \
91 MWL8K_A2H_INT_RADAR_DETECT | \
92 MWL8K_A2H_INT_RADIO_ON | \
93 MWL8K_A2H_INT_RADIO_OFF | \
94 MWL8K_A2H_INT_MAC_EVENT | \
95 MWL8K_A2H_INT_OPC_DONE | \
96 MWL8K_A2H_INT_RX_READY | \
97 MWL8K_A2H_INT_TX_DONE | \
98 MWL8K_A2H_INT_BA_WATCHDOG)
99
100 #define MWL8K_RX_QUEUES 1
101 #define MWL8K_TX_WMM_QUEUES 4
102 #define MWL8K_MAX_AMPDU_QUEUES 8
103 #define MWL8K_MAX_TX_QUEUES (MWL8K_TX_WMM_QUEUES + MWL8K_MAX_AMPDU_QUEUES)
104 #define mwl8k_tx_queues(priv) (MWL8K_TX_WMM_QUEUES + (priv)->num_ampdu_queues)
105
106 /* txpriorities are mapped with hw queues.
107 * Each hw queue has a txpriority.
108 */
109 #define TOTAL_HW_TX_QUEUES 8
110
111 /* Each HW queue can have one AMPDU stream.
112 * But, because one of the hw queue is reserved,
113 * maximum AMPDU queues that can be created are
114 * one short of total tx queues.
115 */
116 #define MWL8K_NUM_AMPDU_STREAMS (TOTAL_HW_TX_QUEUES - 1)
117
118 #define MWL8K_NUM_CHANS 18
119
120 struct rxd_ops {
121 int rxd_size;
122 void (*rxd_init)(void *rxd, dma_addr_t next_dma_addr);
123 void (*rxd_refill)(void *rxd, dma_addr_t addr, int len);
124 int (*rxd_process)(void *rxd, struct ieee80211_rx_status *status,
125 __le16 *qos, s8 *noise);
126 };
127
128 struct mwl8k_device_info {
129 char *part_name;
130 char *helper_image;
131 char *fw_image_sta;
132 char *fw_image_ap;
133 struct rxd_ops *ap_rxd_ops;
134 u32 fw_api_ap;
135 };
136
137 struct mwl8k_rx_queue {
138 int rxd_count;
139
140 /* hw receives here */
141 int head;
142
143 /* refill descs here */
144 int tail;
145
146 void *rxd;
147 dma_addr_t rxd_dma;
148 struct {
149 struct sk_buff *skb;
150 DEFINE_DMA_UNMAP_ADDR(dma);
151 } *buf;
152 };
153
154 struct mwl8k_tx_queue {
155 /* hw transmits here */
156 int head;
157
158 /* sw appends here */
159 int tail;
160
161 unsigned int len;
162 struct mwl8k_tx_desc *txd;
163 dma_addr_t txd_dma;
164 struct sk_buff **skb;
165 };
166
167 enum {
168 AMPDU_NO_STREAM,
169 AMPDU_STREAM_NEW,
170 AMPDU_STREAM_IN_PROGRESS,
171 AMPDU_STREAM_ACTIVE,
172 };
173
174 struct mwl8k_ampdu_stream {
175 struct ieee80211_sta *sta;
176 u8 tid;
177 u8 state;
178 u8 idx;
179 };
180
181 struct mwl8k_priv {
182 struct ieee80211_hw *hw;
183 struct pci_dev *pdev;
184 int irq;
185
186 struct mwl8k_device_info *device_info;
187
188 void __iomem *sram;
189 void __iomem *regs;
190
191 /* firmware */
192 const struct firmware *fw_helper;
193 const struct firmware *fw_ucode;
194
195 /* hardware/firmware parameters */
196 bool ap_fw;
197 struct rxd_ops *rxd_ops;
198 struct ieee80211_supported_band band_24;
199 struct ieee80211_channel channels_24[14];
200 struct ieee80211_rate rates_24[13];
201 struct ieee80211_supported_band band_50;
202 struct ieee80211_channel channels_50[9];
203 struct ieee80211_rate rates_50[8];
204 u32 ap_macids_supported;
205 u32 sta_macids_supported;
206
207 /* Ampdu stream information */
208 u8 num_ampdu_queues;
209 spinlock_t stream_lock;
210 struct mwl8k_ampdu_stream ampdu[MWL8K_MAX_AMPDU_QUEUES];
211 struct work_struct watchdog_ba_handle;
212
213 /* firmware access */
214 struct mutex fw_mutex;
215 struct task_struct *fw_mutex_owner;
216 struct task_struct *hw_restart_owner;
217 int fw_mutex_depth;
218 struct completion *hostcmd_wait;
219
220 atomic_t watchdog_event_pending;
221
222 /* lock held over TX and TX reap */
223 spinlock_t tx_lock;
224
225 /* TX quiesce completion, protected by fw_mutex and tx_lock */
226 struct completion *tx_wait;
227
228 /* List of interfaces. */
229 u32 macids_used;
230 struct list_head vif_list;
231
232 /* power management status cookie from firmware */
233 u32 *cookie;
234 dma_addr_t cookie_dma;
235
236 u16 num_mcaddrs;
237 u8 hw_rev;
238 u32 fw_rev;
239 u32 caps;
240
241 /*
242 * Running count of TX packets in flight, to avoid
243 * iterating over the transmit rings each time.
244 */
245 int pending_tx_pkts;
246
247 struct mwl8k_rx_queue rxq[MWL8K_RX_QUEUES];
248 struct mwl8k_tx_queue txq[MWL8K_MAX_TX_QUEUES];
249 u32 txq_offset[MWL8K_MAX_TX_QUEUES];
250
251 bool radio_on;
252 bool radio_short_preamble;
253 bool sniffer_enabled;
254 bool wmm_enabled;
255
256 /* XXX need to convert this to handle multiple interfaces */
257 bool capture_beacon;
258 u8 capture_bssid[ETH_ALEN];
259 struct sk_buff *beacon_skb;
260
261 /*
262 * This FJ worker has to be global as it is scheduled from the
263 * RX handler. At this point we don't know which interface it
264 * belongs to until the list of bssids waiting to complete join
265 * is checked.
266 */
267 struct work_struct finalize_join_worker;
268
269 /* Tasklet to perform TX reclaim. */
270 struct tasklet_struct poll_tx_task;
271
272 /* Tasklet to perform RX. */
273 struct tasklet_struct poll_rx_task;
274
275 /* Most recently reported noise in dBm */
276 s8 noise;
277
278 /*
279 * preserve the queue configurations so they can be restored if/when
280 * the firmware image is swapped.
281 */
282 struct ieee80211_tx_queue_params wmm_params[MWL8K_TX_WMM_QUEUES];
283
284 /* To perform the task of reloading the firmware */
285 struct work_struct fw_reload;
286 bool hw_restart_in_progress;
287
288 /* async firmware loading state */
289 unsigned fw_state;
290 char *fw_pref;
291 char *fw_alt;
292 bool is_8764;
293 struct completion firmware_loading_complete;
294
295 /* bitmap of running BSSes */
296 u32 running_bsses;
297
298 /* ACS related */
299 bool sw_scan_start;
300 struct ieee80211_channel *acs_chan;
301 unsigned long channel_time;
302 struct survey_info survey[MWL8K_NUM_CHANS];
303 };
304
305 #define MAX_WEP_KEY_LEN 13
306 #define NUM_WEP_KEYS 4
307
308 /* Per interface specific private data */
309 struct mwl8k_vif {
310 struct list_head list;
311 struct ieee80211_vif *vif;
312
313 /* Firmware macid for this vif. */
314 int macid;
315
316 /* Non AMPDU sequence number assigned by driver. */
317 u16 seqno;
318
319 /* Saved WEP keys */
320 struct {
321 u8 enabled;
322 u8 key[sizeof(struct ieee80211_key_conf) + MAX_WEP_KEY_LEN];
323 } wep_key_conf[NUM_WEP_KEYS];
324
325 /* BSSID */
326 u8 bssid[ETH_ALEN];
327
328 /* A flag to indicate is HW crypto is enabled for this bssid */
329 bool is_hw_crypto_enabled;
330 };
331 #define MWL8K_VIF(_vif) ((struct mwl8k_vif *)&((_vif)->drv_priv))
332 #define IEEE80211_KEY_CONF(_u8) ((struct ieee80211_key_conf *)(_u8))
333
334 struct tx_traffic_info {
335 u32 start_time;
336 u32 pkts;
337 };
338
339 #define MWL8K_MAX_TID 8
340 struct mwl8k_sta {
341 /* Index into station database. Returned by UPDATE_STADB. */
342 u8 peer_id;
343 u8 is_ampdu_allowed;
344 struct tx_traffic_info tx_stats[MWL8K_MAX_TID];
345 };
346 #define MWL8K_STA(_sta) ((struct mwl8k_sta *)&((_sta)->drv_priv))
347
348 static const struct ieee80211_channel mwl8k_channels_24[] = {
349 { .band = NL80211_BAND_2GHZ, .center_freq = 2412, .hw_value = 1, },
350 { .band = NL80211_BAND_2GHZ, .center_freq = 2417, .hw_value = 2, },
351 { .band = NL80211_BAND_2GHZ, .center_freq = 2422, .hw_value = 3, },
352 { .band = NL80211_BAND_2GHZ, .center_freq = 2427, .hw_value = 4, },
353 { .band = NL80211_BAND_2GHZ, .center_freq = 2432, .hw_value = 5, },
354 { .band = NL80211_BAND_2GHZ, .center_freq = 2437, .hw_value = 6, },
355 { .band = NL80211_BAND_2GHZ, .center_freq = 2442, .hw_value = 7, },
356 { .band = NL80211_BAND_2GHZ, .center_freq = 2447, .hw_value = 8, },
357 { .band = NL80211_BAND_2GHZ, .center_freq = 2452, .hw_value = 9, },
358 { .band = NL80211_BAND_2GHZ, .center_freq = 2457, .hw_value = 10, },
359 { .band = NL80211_BAND_2GHZ, .center_freq = 2462, .hw_value = 11, },
360 { .band = NL80211_BAND_2GHZ, .center_freq = 2467, .hw_value = 12, },
361 { .band = NL80211_BAND_2GHZ, .center_freq = 2472, .hw_value = 13, },
362 { .band = NL80211_BAND_2GHZ, .center_freq = 2484, .hw_value = 14, },
363 };
364
365 static const struct ieee80211_rate mwl8k_rates_24[] = {
366 { .bitrate = 10, .hw_value = 2, },
367 { .bitrate = 20, .hw_value = 4, },
368 { .bitrate = 55, .hw_value = 11, },
369 { .bitrate = 110, .hw_value = 22, },
370 { .bitrate = 220, .hw_value = 44, },
371 { .bitrate = 60, .hw_value = 12, },
372 { .bitrate = 90, .hw_value = 18, },
373 { .bitrate = 120, .hw_value = 24, },
374 { .bitrate = 180, .hw_value = 36, },
375 { .bitrate = 240, .hw_value = 48, },
376 { .bitrate = 360, .hw_value = 72, },
377 { .bitrate = 480, .hw_value = 96, },
378 { .bitrate = 540, .hw_value = 108, },
379 };
380
381 static const struct ieee80211_channel mwl8k_channels_50[] = {
382 { .band = NL80211_BAND_5GHZ, .center_freq = 5180, .hw_value = 36, },
383 { .band = NL80211_BAND_5GHZ, .center_freq = 5200, .hw_value = 40, },
384 { .band = NL80211_BAND_5GHZ, .center_freq = 5220, .hw_value = 44, },
385 { .band = NL80211_BAND_5GHZ, .center_freq = 5240, .hw_value = 48, },
386 { .band = NL80211_BAND_5GHZ, .center_freq = 5745, .hw_value = 149, },
387 { .band = NL80211_BAND_5GHZ, .center_freq = 5765, .hw_value = 153, },
388 { .band = NL80211_BAND_5GHZ, .center_freq = 5785, .hw_value = 157, },
389 { .band = NL80211_BAND_5GHZ, .center_freq = 5805, .hw_value = 161, },
390 { .band = NL80211_BAND_5GHZ, .center_freq = 5825, .hw_value = 165, },
391 };
392
393 static const struct ieee80211_rate mwl8k_rates_50[] = {
394 { .bitrate = 60, .hw_value = 12, },
395 { .bitrate = 90, .hw_value = 18, },
396 { .bitrate = 120, .hw_value = 24, },
397 { .bitrate = 180, .hw_value = 36, },
398 { .bitrate = 240, .hw_value = 48, },
399 { .bitrate = 360, .hw_value = 72, },
400 { .bitrate = 480, .hw_value = 96, },
401 { .bitrate = 540, .hw_value = 108, },
402 };
403
404 /* Set or get info from Firmware */
405 #define MWL8K_CMD_GET 0x0000
406 #define MWL8K_CMD_SET 0x0001
407 #define MWL8K_CMD_SET_LIST 0x0002
408
409 /* Firmware command codes */
410 #define MWL8K_CMD_CODE_DNLD 0x0001
411 #define MWL8K_CMD_GET_HW_SPEC 0x0003
412 #define MWL8K_CMD_SET_HW_SPEC 0x0004
413 #define MWL8K_CMD_MAC_MULTICAST_ADR 0x0010
414 #define MWL8K_CMD_GET_STAT 0x0014
415 #define MWL8K_CMD_BBP_REG_ACCESS 0x001a
416 #define MWL8K_CMD_RADIO_CONTROL 0x001c
417 #define MWL8K_CMD_RF_TX_POWER 0x001e
418 #define MWL8K_CMD_TX_POWER 0x001f
419 #define MWL8K_CMD_RF_ANTENNA 0x0020
420 #define MWL8K_CMD_SET_BEACON 0x0100 /* per-vif */
421 #define MWL8K_CMD_SET_PRE_SCAN 0x0107
422 #define MWL8K_CMD_SET_POST_SCAN 0x0108
423 #define MWL8K_CMD_SET_RF_CHANNEL 0x010a
424 #define MWL8K_CMD_SET_AID 0x010d
425 #define MWL8K_CMD_SET_RATE 0x0110
426 #define MWL8K_CMD_SET_FINALIZE_JOIN 0x0111
427 #define MWL8K_CMD_RTS_THRESHOLD 0x0113
428 #define MWL8K_CMD_SET_SLOT 0x0114
429 #define MWL8K_CMD_SET_EDCA_PARAMS 0x0115
430 #define MWL8K_CMD_SET_WMM_MODE 0x0123
431 #define MWL8K_CMD_MIMO_CONFIG 0x0125
432 #define MWL8K_CMD_USE_FIXED_RATE 0x0126
433 #define MWL8K_CMD_ENABLE_SNIFFER 0x0150
434 #define MWL8K_CMD_SET_MAC_ADDR 0x0202 /* per-vif */
435 #define MWL8K_CMD_SET_RATEADAPT_MODE 0x0203
436 #define MWL8K_CMD_GET_WATCHDOG_BITMAP 0x0205
437 #define MWL8K_CMD_DEL_MAC_ADDR 0x0206 /* per-vif */
438 #define MWL8K_CMD_BSS_START 0x1100 /* per-vif */
439 #define MWL8K_CMD_SET_NEW_STN 0x1111 /* per-vif */
440 #define MWL8K_CMD_UPDATE_ENCRYPTION 0x1122 /* per-vif */
441 #define MWL8K_CMD_UPDATE_STADB 0x1123
442 #define MWL8K_CMD_BASTREAM 0x1125
443
444 #define MWL8K_LEGACY_5G_RATE_OFFSET \
445 (ARRAY_SIZE(mwl8k_rates_24) - ARRAY_SIZE(mwl8k_rates_50))
446
447 static const char *mwl8k_cmd_name(__le16 cmd, char *buf, int bufsize)
448 {
449 u16 command = le16_to_cpu(cmd);
450
451 #define MWL8K_CMDNAME(x) case MWL8K_CMD_##x: do {\
452 snprintf(buf, bufsize, "%s", #x);\
453 return buf;\
454 } while (0)
455 switch (command & ~0x8000) {
456 MWL8K_CMDNAME(CODE_DNLD);
457 MWL8K_CMDNAME(GET_HW_SPEC);
458 MWL8K_CMDNAME(SET_HW_SPEC);
459 MWL8K_CMDNAME(MAC_MULTICAST_ADR);
460 MWL8K_CMDNAME(GET_STAT);
461 MWL8K_CMDNAME(RADIO_CONTROL);
462 MWL8K_CMDNAME(RF_TX_POWER);
463 MWL8K_CMDNAME(TX_POWER);
464 MWL8K_CMDNAME(RF_ANTENNA);
465 MWL8K_CMDNAME(SET_BEACON);
466 MWL8K_CMDNAME(SET_PRE_SCAN);
467 MWL8K_CMDNAME(SET_POST_SCAN);
468 MWL8K_CMDNAME(SET_RF_CHANNEL);
469 MWL8K_CMDNAME(SET_AID);
470 MWL8K_CMDNAME(SET_RATE);
471 MWL8K_CMDNAME(SET_FINALIZE_JOIN);
472 MWL8K_CMDNAME(RTS_THRESHOLD);
473 MWL8K_CMDNAME(SET_SLOT);
474 MWL8K_CMDNAME(SET_EDCA_PARAMS);
475 MWL8K_CMDNAME(SET_WMM_MODE);
476 MWL8K_CMDNAME(MIMO_CONFIG);
477 MWL8K_CMDNAME(USE_FIXED_RATE);
478 MWL8K_CMDNAME(ENABLE_SNIFFER);
479 MWL8K_CMDNAME(SET_MAC_ADDR);
480 MWL8K_CMDNAME(SET_RATEADAPT_MODE);
481 MWL8K_CMDNAME(BSS_START);
482 MWL8K_CMDNAME(SET_NEW_STN);
483 MWL8K_CMDNAME(UPDATE_ENCRYPTION);
484 MWL8K_CMDNAME(UPDATE_STADB);
485 MWL8K_CMDNAME(BASTREAM);
486 MWL8K_CMDNAME(GET_WATCHDOG_BITMAP);
487 default:
488 snprintf(buf, bufsize, "0x%x", cmd);
489 }
490 #undef MWL8K_CMDNAME
491
492 return buf;
493 }
494
495 /* Hardware and firmware reset */
496 static void mwl8k_hw_reset(struct mwl8k_priv *priv)
497 {
498 iowrite32(MWL8K_H2A_INT_RESET,
499 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
500 iowrite32(MWL8K_H2A_INT_RESET,
501 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
502 msleep(20);
503 }
504
505 /* Release fw image */
506 static void mwl8k_release_fw(const struct firmware **fw)
507 {
508 if (*fw == NULL)
509 return;
510 release_firmware(*fw);
511 *fw = NULL;
512 }
513
514 static void mwl8k_release_firmware(struct mwl8k_priv *priv)
515 {
516 mwl8k_release_fw(&priv->fw_ucode);
517 mwl8k_release_fw(&priv->fw_helper);
518 }
519
520 /* states for asynchronous f/w loading */
521 static void mwl8k_fw_state_machine(const struct firmware *fw, void *context);
522 enum {
523 FW_STATE_INIT = 0,
524 FW_STATE_LOADING_PREF,
525 FW_STATE_LOADING_ALT,
526 FW_STATE_ERROR,
527 };
528
529 /* Request fw image */
530 static int mwl8k_request_fw(struct mwl8k_priv *priv,
531 const char *fname, const struct firmware **fw,
532 bool nowait)
533 {
534 /* release current image */
535 if (*fw != NULL)
536 mwl8k_release_fw(fw);
537
538 if (nowait)
539 return request_firmware_nowait(THIS_MODULE, 1, fname,
540 &priv->pdev->dev, GFP_KERNEL,
541 priv, mwl8k_fw_state_machine);
542 else
543 return request_firmware(fw, fname, &priv->pdev->dev);
544 }
545
546 static int mwl8k_request_firmware(struct mwl8k_priv *priv, char *fw_image,
547 bool nowait)
548 {
549 struct mwl8k_device_info *di = priv->device_info;
550 int rc;
551
552 if (di->helper_image != NULL) {
553 if (nowait)
554 rc = mwl8k_request_fw(priv, di->helper_image,
555 &priv->fw_helper, true);
556 else
557 rc = mwl8k_request_fw(priv, di->helper_image,
558 &priv->fw_helper, false);
559 if (rc)
560 printk(KERN_ERR "%s: Error requesting helper fw %s\n",
561 pci_name(priv->pdev), di->helper_image);
562
563 if (rc || nowait)
564 return rc;
565 }
566
567 if (nowait) {
568 /*
569 * if we get here, no helper image is needed. Skip the
570 * FW_STATE_INIT state.
571 */
572 priv->fw_state = FW_STATE_LOADING_PREF;
573 rc = mwl8k_request_fw(priv, fw_image,
574 &priv->fw_ucode,
575 true);
576 } else
577 rc = mwl8k_request_fw(priv, fw_image,
578 &priv->fw_ucode, false);
579 if (rc) {
580 printk(KERN_ERR "%s: Error requesting firmware file %s\n",
581 pci_name(priv->pdev), fw_image);
582 mwl8k_release_fw(&priv->fw_helper);
583 return rc;
584 }
585
586 return 0;
587 }
588
589 struct mwl8k_cmd_pkt {
590 __le16 code;
591 __le16 length;
592 __u8 seq_num;
593 __u8 macid;
594 __le16 result;
595 char payload[];
596 } __packed;
597
598 /*
599 * Firmware loading.
600 */
601 static int
602 mwl8k_send_fw_load_cmd(struct mwl8k_priv *priv, void *data, int length)
603 {
604 void __iomem *regs = priv->regs;
605 dma_addr_t dma_addr;
606 int loops;
607
608 dma_addr = dma_map_single(&priv->pdev->dev, data, length,
609 DMA_TO_DEVICE);
610 if (dma_mapping_error(&priv->pdev->dev, dma_addr))
611 return -ENOMEM;
612
613 iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
614 iowrite32(0, regs + MWL8K_HIU_INT_CODE);
615 iowrite32(MWL8K_H2A_INT_DOORBELL,
616 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
617 iowrite32(MWL8K_H2A_INT_DUMMY,
618 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
619
620 loops = 1000;
621 do {
622 u32 int_code;
623 if (priv->is_8764) {
624 int_code = ioread32(regs +
625 MWL8K_HIU_H2A_INTERRUPT_STATUS);
626 if (int_code == 0)
627 break;
628 } else {
629 int_code = ioread32(regs + MWL8K_HIU_INT_CODE);
630 if (int_code == MWL8K_INT_CODE_CMD_FINISHED) {
631 iowrite32(0, regs + MWL8K_HIU_INT_CODE);
632 break;
633 }
634 }
635 cond_resched();
636 udelay(1);
637 } while (--loops);
638
639 dma_unmap_single(&priv->pdev->dev, dma_addr, length, DMA_TO_DEVICE);
640
641 return loops ? 0 : -ETIMEDOUT;
642 }
643
644 static int mwl8k_load_fw_image(struct mwl8k_priv *priv,
645 const u8 *data, size_t length)
646 {
647 struct mwl8k_cmd_pkt *cmd;
648 int done;
649 int rc = 0;
650
651 cmd = kmalloc(sizeof(*cmd) + 256, GFP_KERNEL);
652 if (cmd == NULL)
653 return -ENOMEM;
654
655 cmd->code = cpu_to_le16(MWL8K_CMD_CODE_DNLD);
656 cmd->seq_num = 0;
657 cmd->macid = 0;
658 cmd->result = 0;
659
660 done = 0;
661 while (length) {
662 int block_size = length > 256 ? 256 : length;
663
664 memcpy(cmd->payload, data + done, block_size);
665 cmd->length = cpu_to_le16(block_size);
666
667 rc = mwl8k_send_fw_load_cmd(priv, cmd,
668 sizeof(*cmd) + block_size);
669 if (rc)
670 break;
671
672 done += block_size;
673 length -= block_size;
674 }
675
676 if (!rc) {
677 cmd->length = 0;
678 rc = mwl8k_send_fw_load_cmd(priv, cmd, sizeof(*cmd));
679 }
680
681 kfree(cmd);
682
683 return rc;
684 }
685
686 static int mwl8k_feed_fw_image(struct mwl8k_priv *priv,
687 const u8 *data, size_t length)
688 {
689 unsigned char *buffer;
690 int may_continue, rc = 0;
691 u32 done, prev_block_size;
692
693 buffer = kmalloc(1024, GFP_KERNEL);
694 if (buffer == NULL)
695 return -ENOMEM;
696
697 done = 0;
698 prev_block_size = 0;
699 may_continue = 1000;
700 while (may_continue > 0) {
701 u32 block_size;
702
703 block_size = ioread32(priv->regs + MWL8K_HIU_SCRATCH);
704 if (block_size & 1) {
705 block_size &= ~1;
706 may_continue--;
707 } else {
708 done += prev_block_size;
709 length -= prev_block_size;
710 }
711
712 if (block_size > 1024 || block_size > length) {
713 rc = -EOVERFLOW;
714 break;
715 }
716
717 if (length == 0) {
718 rc = 0;
719 break;
720 }
721
722 if (block_size == 0) {
723 rc = -EPROTO;
724 may_continue--;
725 udelay(1);
726 continue;
727 }
728
729 prev_block_size = block_size;
730 memcpy(buffer, data + done, block_size);
731
732 rc = mwl8k_send_fw_load_cmd(priv, buffer, block_size);
733 if (rc)
734 break;
735 }
736
737 if (!rc && length != 0)
738 rc = -EREMOTEIO;
739
740 kfree(buffer);
741
742 return rc;
743 }
744
745 static int mwl8k_load_firmware(struct ieee80211_hw *hw)
746 {
747 struct mwl8k_priv *priv = hw->priv;
748 const struct firmware *fw = priv->fw_ucode;
749 int rc;
750 int loops;
751
752 if (!memcmp(fw->data, "\x01\x00\x00\x00", 4) && !priv->is_8764) {
753 const struct firmware *helper = priv->fw_helper;
754
755 if (helper == NULL) {
756 printk(KERN_ERR "%s: helper image needed but none "
757 "given\n", pci_name(priv->pdev));
758 return -EINVAL;
759 }
760
761 rc = mwl8k_load_fw_image(priv, helper->data, helper->size);
762 if (rc) {
763 printk(KERN_ERR "%s: unable to load firmware "
764 "helper image\n", pci_name(priv->pdev));
765 return rc;
766 }
767 msleep(20);
768
769 rc = mwl8k_feed_fw_image(priv, fw->data, fw->size);
770 } else {
771 if (priv->is_8764)
772 rc = mwl8k_feed_fw_image(priv, fw->data, fw->size);
773 else
774 rc = mwl8k_load_fw_image(priv, fw->data, fw->size);
775 }
776
777 if (rc) {
778 printk(KERN_ERR "%s: unable to load firmware image\n",
779 pci_name(priv->pdev));
780 return rc;
781 }
782
783 iowrite32(MWL8K_MODE_STA, priv->regs + MWL8K_HIU_GEN_PTR);
784
785 loops = 500000;
786 do {
787 u32 ready_code;
788
789 ready_code = ioread32(priv->regs + MWL8K_HIU_INT_CODE);
790 if (ready_code == MWL8K_FWAP_READY) {
791 priv->ap_fw = true;
792 break;
793 } else if (ready_code == MWL8K_FWSTA_READY) {
794 priv->ap_fw = false;
795 break;
796 }
797
798 cond_resched();
799 udelay(1);
800 } while (--loops);
801
802 return loops ? 0 : -ETIMEDOUT;
803 }
804
805
806 /* DMA header used by firmware and hardware. */
807 struct mwl8k_dma_data {
808 __le16 fwlen;
809 struct ieee80211_hdr wh;
810 char data[];
811 } __packed;
812
813 /* Routines to add/remove DMA header from skb. */
814 static inline void mwl8k_remove_dma_header(struct sk_buff *skb, __le16 qos)
815 {
816 struct mwl8k_dma_data *tr;
817 int hdrlen;
818
819 tr = (struct mwl8k_dma_data *)skb->data;
820 hdrlen = ieee80211_hdrlen(tr->wh.frame_control);
821
822 if (hdrlen != sizeof(tr->wh)) {
823 if (ieee80211_is_data_qos(tr->wh.frame_control)) {
824 memmove(tr->data - hdrlen, &tr->wh, hdrlen - 2);
825 *((__le16 *)(tr->data - 2)) = qos;
826 } else {
827 memmove(tr->data - hdrlen, &tr->wh, hdrlen);
828 }
829 }
830
831 if (hdrlen != sizeof(*tr))
832 skb_pull(skb, sizeof(*tr) - hdrlen);
833 }
834
835 #define REDUCED_TX_HEADROOM 8
836
837 static void
838 mwl8k_add_dma_header(struct mwl8k_priv *priv, struct sk_buff *skb,
839 int head_pad, int tail_pad)
840 {
841 struct ieee80211_hdr *wh;
842 int hdrlen;
843 int reqd_hdrlen;
844 struct mwl8k_dma_data *tr;
845
846 /*
847 * Add a firmware DMA header; the firmware requires that we
848 * present a 2-byte payload length followed by a 4-address
849 * header (without QoS field), followed (optionally) by any
850 * WEP/ExtIV header (but only filled in for CCMP).
851 */
852 wh = (struct ieee80211_hdr *)skb->data;
853
854 hdrlen = ieee80211_hdrlen(wh->frame_control);
855
856 /*
857 * Check if skb_resize is required because of
858 * tx_headroom adjustment.
859 */
860 if (priv->ap_fw && (hdrlen < (sizeof(struct ieee80211_cts)
861 + REDUCED_TX_HEADROOM))) {
862 if (pskb_expand_head(skb, REDUCED_TX_HEADROOM, 0, GFP_ATOMIC)) {
863
864 wiphy_err(priv->hw->wiphy,
865 "Failed to reallocate TX buffer\n");
866 return;
867 }
868 skb->truesize += REDUCED_TX_HEADROOM;
869 }
870
871 reqd_hdrlen = sizeof(*tr) + head_pad;
872
873 if (hdrlen != reqd_hdrlen)
874 skb_push(skb, reqd_hdrlen - hdrlen);
875
876 if (ieee80211_is_data_qos(wh->frame_control))
877 hdrlen -= IEEE80211_QOS_CTL_LEN;
878
879 tr = (struct mwl8k_dma_data *)skb->data;
880 if (wh != &tr->wh)
881 memmove(&tr->wh, wh, hdrlen);
882 if (hdrlen != sizeof(tr->wh))
883 memset(((void *)&tr->wh) + hdrlen, 0, sizeof(tr->wh) - hdrlen);
884
885 /*
886 * Firmware length is the length of the fully formed "802.11
887 * payload". That is, everything except for the 802.11 header.
888 * This includes all crypto material including the MIC.
889 */
890 tr->fwlen = cpu_to_le16(skb->len - sizeof(*tr) + tail_pad);
891 }
892
893 static void mwl8k_encapsulate_tx_frame(struct mwl8k_priv *priv,
894 struct sk_buff *skb)
895 {
896 struct ieee80211_hdr *wh;
897 struct ieee80211_tx_info *tx_info;
898 struct ieee80211_key_conf *key_conf;
899 int data_pad;
900 int head_pad = 0;
901
902 wh = (struct ieee80211_hdr *)skb->data;
903
904 tx_info = IEEE80211_SKB_CB(skb);
905
906 key_conf = NULL;
907 if (ieee80211_is_data(wh->frame_control))
908 key_conf = tx_info->control.hw_key;
909
910 /*
911 * Make sure the packet header is in the DMA header format (4-address
912 * without QoS), and add head & tail padding when HW crypto is enabled.
913 *
914 * We have the following trailer padding requirements:
915 * - WEP: 4 trailer bytes (ICV)
916 * - TKIP: 12 trailer bytes (8 MIC + 4 ICV)
917 * - CCMP: 8 trailer bytes (MIC)
918 */
919 data_pad = 0;
920 if (key_conf != NULL) {
921 head_pad = key_conf->iv_len;
922 switch (key_conf->cipher) {
923 case WLAN_CIPHER_SUITE_WEP40:
924 case WLAN_CIPHER_SUITE_WEP104:
925 data_pad = 4;
926 break;
927 case WLAN_CIPHER_SUITE_TKIP:
928 data_pad = 12;
929 break;
930 case WLAN_CIPHER_SUITE_CCMP:
931 data_pad = 8;
932 break;
933 }
934 }
935 mwl8k_add_dma_header(priv, skb, head_pad, data_pad);
936 }
937
938 /*
939 * Packet reception for 88w8366/88w8764 AP firmware.
940 */
941 struct mwl8k_rxd_ap {
942 __le16 pkt_len;
943 __u8 sq2;
944 __u8 rate;
945 __le32 pkt_phys_addr;
946 __le32 next_rxd_phys_addr;
947 __le16 qos_control;
948 __le16 htsig2;
949 __le32 hw_rssi_info;
950 __le32 hw_noise_floor_info;
951 __u8 noise_floor;
952 __u8 pad0[3];
953 __u8 rssi;
954 __u8 rx_status;
955 __u8 channel;
956 __u8 rx_ctrl;
957 } __packed;
958
959 #define MWL8K_AP_RATE_INFO_MCS_FORMAT 0x80
960 #define MWL8K_AP_RATE_INFO_40MHZ 0x40
961 #define MWL8K_AP_RATE_INFO_RATEID(x) ((x) & 0x3f)
962
963 #define MWL8K_AP_RX_CTRL_OWNED_BY_HOST 0x80
964
965 /* 8366/8764 AP rx_status bits */
966 #define MWL8K_AP_RXSTAT_DECRYPT_ERR_MASK 0x80
967 #define MWL8K_AP_RXSTAT_GENERAL_DECRYPT_ERR 0xFF
968 #define MWL8K_AP_RXSTAT_TKIP_DECRYPT_MIC_ERR 0x02
969 #define MWL8K_AP_RXSTAT_WEP_DECRYPT_ICV_ERR 0x04
970 #define MWL8K_AP_RXSTAT_TKIP_DECRYPT_ICV_ERR 0x08
971
972 static void mwl8k_rxd_ap_init(void *_rxd, dma_addr_t next_dma_addr)
973 {
974 struct mwl8k_rxd_ap *rxd = _rxd;
975
976 rxd->next_rxd_phys_addr = cpu_to_le32(next_dma_addr);
977 rxd->rx_ctrl = MWL8K_AP_RX_CTRL_OWNED_BY_HOST;
978 }
979
980 static void mwl8k_rxd_ap_refill(void *_rxd, dma_addr_t addr, int len)
981 {
982 struct mwl8k_rxd_ap *rxd = _rxd;
983
984 rxd->pkt_len = cpu_to_le16(len);
985 rxd->pkt_phys_addr = cpu_to_le32(addr);
986 wmb();
987 rxd->rx_ctrl = 0;
988 }
989
990 static int
991 mwl8k_rxd_ap_process(void *_rxd, struct ieee80211_rx_status *status,
992 __le16 *qos, s8 *noise)
993 {
994 struct mwl8k_rxd_ap *rxd = _rxd;
995
996 if (!(rxd->rx_ctrl & MWL8K_AP_RX_CTRL_OWNED_BY_HOST))
997 return -1;
998 rmb();
999
1000 memset(status, 0, sizeof(*status));
1001
1002 status->signal = -rxd->rssi;
1003 *noise = -rxd->noise_floor;
1004
1005 if (rxd->rate & MWL8K_AP_RATE_INFO_MCS_FORMAT) {
1006 status->encoding = RX_ENC_HT;
1007 if (rxd->rate & MWL8K_AP_RATE_INFO_40MHZ)
1008 status->bw = RATE_INFO_BW_40;
1009 status->rate_idx = MWL8K_AP_RATE_INFO_RATEID(rxd->rate);
1010 } else {
1011 int i;
1012
1013 for (i = 0; i < ARRAY_SIZE(mwl8k_rates_24); i++) {
1014 if (mwl8k_rates_24[i].hw_value == rxd->rate) {
1015 status->rate_idx = i;
1016 break;
1017 }
1018 }
1019 }
1020
1021 if (rxd->channel > 14) {
1022 status->band = NL80211_BAND_5GHZ;
1023 if (!(status->encoding == RX_ENC_HT) &&
1024 status->rate_idx >= MWL8K_LEGACY_5G_RATE_OFFSET)
1025 status->rate_idx -= MWL8K_LEGACY_5G_RATE_OFFSET;
1026 } else {
1027 status->band = NL80211_BAND_2GHZ;
1028 }
1029 status->freq = ieee80211_channel_to_frequency(rxd->channel,
1030 status->band);
1031
1032 *qos = rxd->qos_control;
1033
1034 if ((rxd->rx_status != MWL8K_AP_RXSTAT_GENERAL_DECRYPT_ERR) &&
1035 (rxd->rx_status & MWL8K_AP_RXSTAT_DECRYPT_ERR_MASK) &&
1036 (rxd->rx_status & MWL8K_AP_RXSTAT_TKIP_DECRYPT_MIC_ERR))
1037 status->flag |= RX_FLAG_MMIC_ERROR;
1038
1039 return le16_to_cpu(rxd->pkt_len);
1040 }
1041
1042 static struct rxd_ops rxd_ap_ops = {
1043 .rxd_size = sizeof(struct mwl8k_rxd_ap),
1044 .rxd_init = mwl8k_rxd_ap_init,
1045 .rxd_refill = mwl8k_rxd_ap_refill,
1046 .rxd_process = mwl8k_rxd_ap_process,
1047 };
1048
1049 /*
1050 * Packet reception for STA firmware.
1051 */
1052 struct mwl8k_rxd_sta {
1053 __le16 pkt_len;
1054 __u8 link_quality;
1055 __u8 noise_level;
1056 __le32 pkt_phys_addr;
1057 __le32 next_rxd_phys_addr;
1058 __le16 qos_control;
1059 __le16 rate_info;
1060 __le32 pad0[4];
1061 __u8 rssi;
1062 __u8 channel;
1063 __le16 pad1;
1064 __u8 rx_ctrl;
1065 __u8 rx_status;
1066 __u8 pad2[2];
1067 } __packed;
1068
1069 #define MWL8K_STA_RATE_INFO_SHORTPRE 0x8000
1070 #define MWL8K_STA_RATE_INFO_ANTSELECT(x) (((x) >> 11) & 0x3)
1071 #define MWL8K_STA_RATE_INFO_RATEID(x) (((x) >> 3) & 0x3f)
1072 #define MWL8K_STA_RATE_INFO_40MHZ 0x0004
1073 #define MWL8K_STA_RATE_INFO_SHORTGI 0x0002
1074 #define MWL8K_STA_RATE_INFO_MCS_FORMAT 0x0001
1075
1076 #define MWL8K_STA_RX_CTRL_OWNED_BY_HOST 0x02
1077 #define MWL8K_STA_RX_CTRL_DECRYPT_ERROR 0x04
1078 /* ICV=0 or MIC=1 */
1079 #define MWL8K_STA_RX_CTRL_DEC_ERR_TYPE 0x08
1080 /* Key is uploaded only in failure case */
1081 #define MWL8K_STA_RX_CTRL_KEY_INDEX 0x30
1082
1083 static void mwl8k_rxd_sta_init(void *_rxd, dma_addr_t next_dma_addr)
1084 {
1085 struct mwl8k_rxd_sta *rxd = _rxd;
1086
1087 rxd->next_rxd_phys_addr = cpu_to_le32(next_dma_addr);
1088 rxd->rx_ctrl = MWL8K_STA_RX_CTRL_OWNED_BY_HOST;
1089 }
1090
1091 static void mwl8k_rxd_sta_refill(void *_rxd, dma_addr_t addr, int len)
1092 {
1093 struct mwl8k_rxd_sta *rxd = _rxd;
1094
1095 rxd->pkt_len = cpu_to_le16(len);
1096 rxd->pkt_phys_addr = cpu_to_le32(addr);
1097 wmb();
1098 rxd->rx_ctrl = 0;
1099 }
1100
1101 static int
1102 mwl8k_rxd_sta_process(void *_rxd, struct ieee80211_rx_status *status,
1103 __le16 *qos, s8 *noise)
1104 {
1105 struct mwl8k_rxd_sta *rxd = _rxd;
1106 u16 rate_info;
1107
1108 if (!(rxd->rx_ctrl & MWL8K_STA_RX_CTRL_OWNED_BY_HOST))
1109 return -1;
1110 rmb();
1111
1112 rate_info = le16_to_cpu(rxd->rate_info);
1113
1114 memset(status, 0, sizeof(*status));
1115
1116 status->signal = -rxd->rssi;
1117 *noise = -rxd->noise_level;
1118 status->antenna = MWL8K_STA_RATE_INFO_ANTSELECT(rate_info);
1119 status->rate_idx = MWL8K_STA_RATE_INFO_RATEID(rate_info);
1120
1121 if (rate_info & MWL8K_STA_RATE_INFO_SHORTPRE)
1122 status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
1123 if (rate_info & MWL8K_STA_RATE_INFO_40MHZ)
1124 status->bw = RATE_INFO_BW_40;
1125 if (rate_info & MWL8K_STA_RATE_INFO_SHORTGI)
1126 status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
1127 if (rate_info & MWL8K_STA_RATE_INFO_MCS_FORMAT)
1128 status->encoding = RX_ENC_HT;
1129
1130 if (rxd->channel > 14) {
1131 status->band = NL80211_BAND_5GHZ;
1132 if (!(status->encoding == RX_ENC_HT) &&
1133 status->rate_idx >= MWL8K_LEGACY_5G_RATE_OFFSET)
1134 status->rate_idx -= MWL8K_LEGACY_5G_RATE_OFFSET;
1135 } else {
1136 status->band = NL80211_BAND_2GHZ;
1137 }
1138 status->freq = ieee80211_channel_to_frequency(rxd->channel,
1139 status->band);
1140
1141 *qos = rxd->qos_control;
1142 if ((rxd->rx_ctrl & MWL8K_STA_RX_CTRL_DECRYPT_ERROR) &&
1143 (rxd->rx_ctrl & MWL8K_STA_RX_CTRL_DEC_ERR_TYPE))
1144 status->flag |= RX_FLAG_MMIC_ERROR;
1145
1146 return le16_to_cpu(rxd->pkt_len);
1147 }
1148
1149 static struct rxd_ops rxd_sta_ops = {
1150 .rxd_size = sizeof(struct mwl8k_rxd_sta),
1151 .rxd_init = mwl8k_rxd_sta_init,
1152 .rxd_refill = mwl8k_rxd_sta_refill,
1153 .rxd_process = mwl8k_rxd_sta_process,
1154 };
1155
1156
1157 #define MWL8K_RX_DESCS 256
1158 #define MWL8K_RX_MAXSZ 3800
1159
1160 static int mwl8k_rxq_init(struct ieee80211_hw *hw, int index)
1161 {
1162 struct mwl8k_priv *priv = hw->priv;
1163 struct mwl8k_rx_queue *rxq = priv->rxq + index;
1164 int size;
1165 int i;
1166
1167 rxq->rxd_count = 0;
1168 rxq->head = 0;
1169 rxq->tail = 0;
1170
1171 size = MWL8K_RX_DESCS * priv->rxd_ops->rxd_size;
1172
1173 rxq->rxd = dma_alloc_coherent(&priv->pdev->dev, size, &rxq->rxd_dma,
1174 GFP_KERNEL);
1175 if (rxq->rxd == NULL) {
1176 wiphy_err(hw->wiphy, "failed to alloc RX descriptors\n");
1177 return -ENOMEM;
1178 }
1179
1180 rxq->buf = kcalloc(MWL8K_RX_DESCS, sizeof(*rxq->buf), GFP_KERNEL);
1181 if (rxq->buf == NULL) {
1182 dma_free_coherent(&priv->pdev->dev, size, rxq->rxd,
1183 rxq->rxd_dma);
1184 return -ENOMEM;
1185 }
1186
1187 for (i = 0; i < MWL8K_RX_DESCS; i++) {
1188 int desc_size;
1189 void *rxd;
1190 int nexti;
1191 dma_addr_t next_dma_addr;
1192
1193 desc_size = priv->rxd_ops->rxd_size;
1194 rxd = rxq->rxd + (i * priv->rxd_ops->rxd_size);
1195
1196 nexti = i + 1;
1197 if (nexti == MWL8K_RX_DESCS)
1198 nexti = 0;
1199 next_dma_addr = rxq->rxd_dma + (nexti * desc_size);
1200
1201 priv->rxd_ops->rxd_init(rxd, next_dma_addr);
1202 }
1203
1204 return 0;
1205 }
1206
1207 static int rxq_refill(struct ieee80211_hw *hw, int index, int limit)
1208 {
1209 struct mwl8k_priv *priv = hw->priv;
1210 struct mwl8k_rx_queue *rxq = priv->rxq + index;
1211 int refilled;
1212
1213 refilled = 0;
1214 while (rxq->rxd_count < MWL8K_RX_DESCS && limit--) {
1215 struct sk_buff *skb;
1216 dma_addr_t addr;
1217 int rx;
1218 void *rxd;
1219
1220 skb = dev_alloc_skb(MWL8K_RX_MAXSZ);
1221 if (skb == NULL)
1222 break;
1223
1224 addr = dma_map_single(&priv->pdev->dev, skb->data,
1225 MWL8K_RX_MAXSZ, DMA_FROM_DEVICE);
1226
1227 rxq->rxd_count++;
1228 rx = rxq->tail++;
1229 if (rxq->tail == MWL8K_RX_DESCS)
1230 rxq->tail = 0;
1231 rxq->buf[rx].skb = skb;
1232 dma_unmap_addr_set(&rxq->buf[rx], dma, addr);
1233
1234 rxd = rxq->rxd + (rx * priv->rxd_ops->rxd_size);
1235 priv->rxd_ops->rxd_refill(rxd, addr, MWL8K_RX_MAXSZ);
1236
1237 refilled++;
1238 }
1239
1240 return refilled;
1241 }
1242
1243 /* Must be called only when the card's reception is completely halted */
1244 static void mwl8k_rxq_deinit(struct ieee80211_hw *hw, int index)
1245 {
1246 struct mwl8k_priv *priv = hw->priv;
1247 struct mwl8k_rx_queue *rxq = priv->rxq + index;
1248 int i;
1249
1250 if (rxq->rxd == NULL)
1251 return;
1252
1253 for (i = 0; i < MWL8K_RX_DESCS; i++) {
1254 if (rxq->buf[i].skb != NULL) {
1255 dma_unmap_single(&priv->pdev->dev,
1256 dma_unmap_addr(&rxq->buf[i], dma),
1257 MWL8K_RX_MAXSZ, DMA_FROM_DEVICE);
1258 dma_unmap_addr_set(&rxq->buf[i], dma, 0);
1259
1260 kfree_skb(rxq->buf[i].skb);
1261 rxq->buf[i].skb = NULL;
1262 }
1263 }
1264
1265 kfree(rxq->buf);
1266 rxq->buf = NULL;
1267
1268 dma_free_coherent(&priv->pdev->dev,
1269 MWL8K_RX_DESCS * priv->rxd_ops->rxd_size, rxq->rxd,
1270 rxq->rxd_dma);
1271 rxq->rxd = NULL;
1272 }
1273
1274
1275 /*
1276 * Scan a list of BSSIDs to process for finalize join.
1277 * Allows for extension to process multiple BSSIDs.
1278 */
1279 static inline int
1280 mwl8k_capture_bssid(struct mwl8k_priv *priv, struct ieee80211_hdr *wh)
1281 {
1282 return priv->capture_beacon &&
1283 ieee80211_is_beacon(wh->frame_control) &&
1284 ether_addr_equal_64bits(wh->addr3, priv->capture_bssid);
1285 }
1286
1287 static inline void mwl8k_save_beacon(struct ieee80211_hw *hw,
1288 struct sk_buff *skb)
1289 {
1290 struct mwl8k_priv *priv = hw->priv;
1291
1292 priv->capture_beacon = false;
1293 eth_zero_addr(priv->capture_bssid);
1294
1295 /*
1296 * Use GFP_ATOMIC as rxq_process is called from
1297 * the primary interrupt handler, memory allocation call
1298 * must not sleep.
1299 */
1300 priv->beacon_skb = skb_copy(skb, GFP_ATOMIC);
1301 if (priv->beacon_skb != NULL)
1302 ieee80211_queue_work(hw, &priv->finalize_join_worker);
1303 }
1304
1305 static inline struct mwl8k_vif *mwl8k_find_vif_bss(struct list_head *vif_list,
1306 u8 *bssid)
1307 {
1308 struct mwl8k_vif *mwl8k_vif;
1309
1310 list_for_each_entry(mwl8k_vif,
1311 vif_list, list) {
1312 if (memcmp(bssid, mwl8k_vif->bssid,
1313 ETH_ALEN) == 0)
1314 return mwl8k_vif;
1315 }
1316
1317 return NULL;
1318 }
1319
1320 static int rxq_process(struct ieee80211_hw *hw, int index, int limit)
1321 {
1322 struct mwl8k_priv *priv = hw->priv;
1323 struct mwl8k_vif *mwl8k_vif = NULL;
1324 struct mwl8k_rx_queue *rxq = priv->rxq + index;
1325 int processed;
1326
1327 processed = 0;
1328 while (rxq->rxd_count && limit--) {
1329 struct sk_buff *skb;
1330 void *rxd;
1331 int pkt_len;
1332 struct ieee80211_rx_status status;
1333 struct ieee80211_hdr *wh;
1334 __le16 qos;
1335
1336 skb = rxq->buf[rxq->head].skb;
1337 if (skb == NULL)
1338 break;
1339
1340 rxd = rxq->rxd + (rxq->head * priv->rxd_ops->rxd_size);
1341
1342 pkt_len = priv->rxd_ops->rxd_process(rxd, &status, &qos,
1343 &priv->noise);
1344 if (pkt_len < 0)
1345 break;
1346
1347 rxq->buf[rxq->head].skb = NULL;
1348
1349 dma_unmap_single(&priv->pdev->dev,
1350 dma_unmap_addr(&rxq->buf[rxq->head], dma),
1351 MWL8K_RX_MAXSZ, DMA_FROM_DEVICE);
1352 dma_unmap_addr_set(&rxq->buf[rxq->head], dma, 0);
1353
1354 rxq->head++;
1355 if (rxq->head == MWL8K_RX_DESCS)
1356 rxq->head = 0;
1357
1358 rxq->rxd_count--;
1359
1360 wh = &((struct mwl8k_dma_data *)skb->data)->wh;
1361
1362 /*
1363 * Check for a pending join operation. Save a
1364 * copy of the beacon and schedule a tasklet to
1365 * send a FINALIZE_JOIN command to the firmware.
1366 */
1367 if (mwl8k_capture_bssid(priv, (void *)skb->data))
1368 mwl8k_save_beacon(hw, skb);
1369
1370 if (ieee80211_has_protected(wh->frame_control)) {
1371
1372 /* Check if hw crypto has been enabled for
1373 * this bss. If yes, set the status flags
1374 * accordingly
1375 */
1376 mwl8k_vif = mwl8k_find_vif_bss(&priv->vif_list,
1377 wh->addr1);
1378
1379 if (mwl8k_vif != NULL &&
1380 mwl8k_vif->is_hw_crypto_enabled) {
1381 /*
1382 * When MMIC ERROR is encountered
1383 * by the firmware, payload is
1384 * dropped and only 32 bytes of
1385 * mwl8k Firmware header is sent
1386 * to the host.
1387 *
1388 * We need to add four bytes of
1389 * key information. In it
1390 * MAC80211 expects keyidx set to
1391 * 0 for triggering Counter
1392 * Measure of MMIC failure.
1393 */
1394 if (status.flag & RX_FLAG_MMIC_ERROR) {
1395 struct mwl8k_dma_data *tr;
1396 tr = (struct mwl8k_dma_data *)skb->data;
1397 memset((void *)&(tr->data), 0, 4);
1398 pkt_len += 4;
1399 }
1400
1401 if (!ieee80211_is_auth(wh->frame_control))
1402 status.flag |= RX_FLAG_IV_STRIPPED |
1403 RX_FLAG_DECRYPTED |
1404 RX_FLAG_MMIC_STRIPPED;
1405 }
1406 }
1407
1408 skb_put(skb, pkt_len);
1409 mwl8k_remove_dma_header(skb, qos);
1410 memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
1411 ieee80211_rx_irqsafe(hw, skb);
1412
1413 processed++;
1414 }
1415
1416 return processed;
1417 }
1418
1419
1420 /*
1421 * Packet transmission.
1422 */
1423
1424 #define MWL8K_TXD_STATUS_OK 0x00000001
1425 #define MWL8K_TXD_STATUS_OK_RETRY 0x00000002
1426 #define MWL8K_TXD_STATUS_OK_MORE_RETRY 0x00000004
1427 #define MWL8K_TXD_STATUS_MULTICAST_TX 0x00000008
1428 #define MWL8K_TXD_STATUS_FW_OWNED 0x80000000
1429
1430 #define MWL8K_QOS_QLEN_UNSPEC 0xff00
1431 #define MWL8K_QOS_ACK_POLICY_MASK 0x0060
1432 #define MWL8K_QOS_ACK_POLICY_NORMAL 0x0000
1433 #define MWL8K_QOS_ACK_POLICY_BLOCKACK 0x0060
1434 #define MWL8K_QOS_EOSP 0x0010
1435
1436 struct mwl8k_tx_desc {
1437 __le32 status;
1438 __u8 data_rate;
1439 __u8 tx_priority;
1440 __le16 qos_control;
1441 __le32 pkt_phys_addr;
1442 __le16 pkt_len;
1443 __u8 dest_MAC_addr[ETH_ALEN];
1444 __le32 next_txd_phys_addr;
1445 __le32 timestamp;
1446 __le16 rate_info;
1447 __u8 peer_id;
1448 __u8 tx_frag_cnt;
1449 } __packed;
1450
1451 #define MWL8K_TX_DESCS 128
1452
1453 static int mwl8k_txq_init(struct ieee80211_hw *hw, int index)
1454 {
1455 struct mwl8k_priv *priv = hw->priv;
1456 struct mwl8k_tx_queue *txq = priv->txq + index;
1457 int size;
1458 int i;
1459
1460 txq->len = 0;
1461 txq->head = 0;
1462 txq->tail = 0;
1463
1464 size = MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc);
1465
1466 txq->txd = dma_alloc_coherent(&priv->pdev->dev, size, &txq->txd_dma,
1467 GFP_KERNEL);
1468 if (txq->txd == NULL) {
1469 wiphy_err(hw->wiphy, "failed to alloc TX descriptors\n");
1470 return -ENOMEM;
1471 }
1472
1473 txq->skb = kcalloc(MWL8K_TX_DESCS, sizeof(*txq->skb), GFP_KERNEL);
1474 if (txq->skb == NULL) {
1475 dma_free_coherent(&priv->pdev->dev, size, txq->txd,
1476 txq->txd_dma);
1477 return -ENOMEM;
1478 }
1479
1480 for (i = 0; i < MWL8K_TX_DESCS; i++) {
1481 struct mwl8k_tx_desc *tx_desc;
1482 int nexti;
1483
1484 tx_desc = txq->txd + i;
1485 nexti = (i + 1) % MWL8K_TX_DESCS;
1486
1487 tx_desc->status = 0;
1488 tx_desc->next_txd_phys_addr =
1489 cpu_to_le32(txq->txd_dma + nexti * sizeof(*tx_desc));
1490 }
1491
1492 return 0;
1493 }
1494
1495 static inline void mwl8k_tx_start(struct mwl8k_priv *priv)
1496 {
1497 iowrite32(MWL8K_H2A_INT_PPA_READY,
1498 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
1499 iowrite32(MWL8K_H2A_INT_DUMMY,
1500 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
1501 ioread32(priv->regs + MWL8K_HIU_INT_CODE);
1502 }
1503
1504 static void mwl8k_dump_tx_rings(struct ieee80211_hw *hw)
1505 {
1506 struct mwl8k_priv *priv = hw->priv;
1507 int i;
1508
1509 for (i = 0; i < mwl8k_tx_queues(priv); i++) {
1510 struct mwl8k_tx_queue *txq = priv->txq + i;
1511 int fw_owned = 0;
1512 int drv_owned = 0;
1513 int unused = 0;
1514 int desc;
1515
1516 for (desc = 0; desc < MWL8K_TX_DESCS; desc++) {
1517 struct mwl8k_tx_desc *tx_desc = txq->txd + desc;
1518 u32 status;
1519
1520 status = le32_to_cpu(tx_desc->status);
1521 if (status & MWL8K_TXD_STATUS_FW_OWNED)
1522 fw_owned++;
1523 else
1524 drv_owned++;
1525
1526 if (tx_desc->pkt_len == 0)
1527 unused++;
1528 }
1529
1530 wiphy_err(hw->wiphy,
1531 "txq[%d] len=%d head=%d tail=%d "
1532 "fw_owned=%d drv_owned=%d unused=%d\n",
1533 i,
1534 txq->len, txq->head, txq->tail,
1535 fw_owned, drv_owned, unused);
1536 }
1537 }
1538
1539 /*
1540 * Must be called with priv->fw_mutex held and tx queues stopped.
1541 */
1542 #define MWL8K_TX_WAIT_TIMEOUT_MS 5000
1543
1544 static int mwl8k_tx_wait_empty(struct ieee80211_hw *hw)
1545 {
1546 struct mwl8k_priv *priv = hw->priv;
1547 DECLARE_COMPLETION_ONSTACK(tx_wait);
1548 int retry;
1549 int rc;
1550
1551 might_sleep();
1552
1553 /* Since fw restart is in progress, allow only the firmware
1554 * commands from the restart code and block the other
1555 * commands since they are going to fail in any case since
1556 * the firmware has crashed
1557 */
1558 if (priv->hw_restart_in_progress) {
1559 if (priv->hw_restart_owner == current)
1560 return 0;
1561 else
1562 return -EBUSY;
1563 }
1564
1565 if (atomic_read(&priv->watchdog_event_pending))
1566 return 0;
1567
1568 /*
1569 * The TX queues are stopped at this point, so this test
1570 * doesn't need to take ->tx_lock.
1571 */
1572 if (!priv->pending_tx_pkts)
1573 return 0;
1574
1575 retry = 1;
1576 rc = 0;
1577
1578 spin_lock_bh(&priv->tx_lock);
1579 priv->tx_wait = &tx_wait;
1580 while (!rc) {
1581 int oldcount;
1582 unsigned long timeout;
1583
1584 oldcount = priv->pending_tx_pkts;
1585
1586 spin_unlock_bh(&priv->tx_lock);
1587 timeout = wait_for_completion_timeout(&tx_wait,
1588 msecs_to_jiffies(MWL8K_TX_WAIT_TIMEOUT_MS));
1589
1590 if (atomic_read(&priv->watchdog_event_pending)) {
1591 spin_lock_bh(&priv->tx_lock);
1592 priv->tx_wait = NULL;
1593 spin_unlock_bh(&priv->tx_lock);
1594 return 0;
1595 }
1596
1597 spin_lock_bh(&priv->tx_lock);
1598
1599 if (timeout || !priv->pending_tx_pkts) {
1600 WARN_ON(priv->pending_tx_pkts);
1601 if (retry)
1602 wiphy_notice(hw->wiphy, "tx rings drained\n");
1603 break;
1604 }
1605
1606 if (retry) {
1607 mwl8k_tx_start(priv);
1608 retry = 0;
1609 continue;
1610 }
1611
1612 if (priv->pending_tx_pkts < oldcount) {
1613 wiphy_notice(hw->wiphy,
1614 "waiting for tx rings to drain (%d -> %d pkts)\n",
1615 oldcount, priv->pending_tx_pkts);
1616 retry = 1;
1617 continue;
1618 }
1619
1620 priv->tx_wait = NULL;
1621
1622 wiphy_err(hw->wiphy, "tx rings stuck for %d ms\n",
1623 MWL8K_TX_WAIT_TIMEOUT_MS);
1624 mwl8k_dump_tx_rings(hw);
1625 priv->hw_restart_in_progress = true;
1626 ieee80211_queue_work(hw, &priv->fw_reload);
1627
1628 rc = -ETIMEDOUT;
1629 }
1630 priv->tx_wait = NULL;
1631 spin_unlock_bh(&priv->tx_lock);
1632
1633 return rc;
1634 }
1635
1636 #define MWL8K_TXD_SUCCESS(status) \
1637 ((status) & (MWL8K_TXD_STATUS_OK | \
1638 MWL8K_TXD_STATUS_OK_RETRY | \
1639 MWL8K_TXD_STATUS_OK_MORE_RETRY))
1640
1641 static int mwl8k_tid_queue_mapping(u8 tid)
1642 {
1643 BUG_ON(tid > 7);
1644
1645 switch (tid) {
1646 case 0:
1647 case 3:
1648 return IEEE80211_AC_BE;
1649 case 1:
1650 case 2:
1651 return IEEE80211_AC_BK;
1652 case 4:
1653 case 5:
1654 return IEEE80211_AC_VI;
1655 case 6:
1656 case 7:
1657 return IEEE80211_AC_VO;
1658 default:
1659 return -1;
1660 }
1661 }
1662
1663 /* The firmware will fill in the rate information
1664 * for each packet that gets queued in the hardware
1665 * and these macros will interpret that info.
1666 */
1667
1668 #define RI_FORMAT(a) (a & 0x0001)
1669 #define RI_RATE_ID_MCS(a) ((a & 0x01f8) >> 3)
1670
1671 static int
1672 mwl8k_txq_reclaim(struct ieee80211_hw *hw, int index, int limit, int force)
1673 {
1674 struct mwl8k_priv *priv = hw->priv;
1675 struct mwl8k_tx_queue *txq = priv->txq + index;
1676 int processed;
1677
1678 processed = 0;
1679 while (txq->len > 0 && limit--) {
1680 int tx;
1681 struct mwl8k_tx_desc *tx_desc;
1682 unsigned long addr;
1683 int size;
1684 struct sk_buff *skb;
1685 struct ieee80211_tx_info *info;
1686 u32 status;
1687 struct ieee80211_sta *sta;
1688 struct mwl8k_sta *sta_info = NULL;
1689 u16 rate_info;
1690 struct ieee80211_hdr *wh;
1691
1692 tx = txq->head;
1693 tx_desc = txq->txd + tx;
1694
1695 status = le32_to_cpu(tx_desc->status);
1696
1697 if (status & MWL8K_TXD_STATUS_FW_OWNED) {
1698 if (!force)
1699 break;
1700 tx_desc->status &=
1701 ~cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED);
1702 }
1703
1704 txq->head = (tx + 1) % MWL8K_TX_DESCS;
1705 BUG_ON(txq->len == 0);
1706 txq->len--;
1707 priv->pending_tx_pkts--;
1708
1709 addr = le32_to_cpu(tx_desc->pkt_phys_addr);
1710 size = le16_to_cpu(tx_desc->pkt_len);
1711 skb = txq->skb[tx];
1712 txq->skb[tx] = NULL;
1713
1714 BUG_ON(skb == NULL);
1715 dma_unmap_single(&priv->pdev->dev, addr, size, DMA_TO_DEVICE);
1716
1717 mwl8k_remove_dma_header(skb, tx_desc->qos_control);
1718
1719 wh = (struct ieee80211_hdr *) skb->data;
1720
1721 /* Mark descriptor as unused */
1722 tx_desc->pkt_phys_addr = 0;
1723 tx_desc->pkt_len = 0;
1724
1725 info = IEEE80211_SKB_CB(skb);
1726 if (ieee80211_is_data(wh->frame_control)) {
1727 rcu_read_lock();
1728 sta = ieee80211_find_sta_by_ifaddr(hw, wh->addr1,
1729 wh->addr2);
1730 if (sta) {
1731 sta_info = MWL8K_STA(sta);
1732 BUG_ON(sta_info == NULL);
1733 rate_info = le16_to_cpu(tx_desc->rate_info);
1734 /* If rate is < 6.5 Mpbs for an ht station
1735 * do not form an ampdu. If the station is a
1736 * legacy station (format = 0), do not form an
1737 * ampdu
1738 */
1739 if (RI_RATE_ID_MCS(rate_info) < 1 ||
1740 RI_FORMAT(rate_info) == 0) {
1741 sta_info->is_ampdu_allowed = false;
1742 } else {
1743 sta_info->is_ampdu_allowed = true;
1744 }
1745 }
1746 rcu_read_unlock();
1747 }
1748
1749 ieee80211_tx_info_clear_status(info);
1750
1751 /* Rate control is happening in the firmware.
1752 * Ensure no tx rate is being reported.
1753 */
1754 info->status.rates[0].idx = -1;
1755 info->status.rates[0].count = 1;
1756
1757 if (MWL8K_TXD_SUCCESS(status))
1758 info->flags |= IEEE80211_TX_STAT_ACK;
1759
1760 ieee80211_tx_status_irqsafe(hw, skb);
1761
1762 processed++;
1763 }
1764
1765 return processed;
1766 }
1767
1768 /* must be called only when the card's transmit is completely halted */
1769 static void mwl8k_txq_deinit(struct ieee80211_hw *hw, int index)
1770 {
1771 struct mwl8k_priv *priv = hw->priv;
1772 struct mwl8k_tx_queue *txq = priv->txq + index;
1773
1774 if (txq->txd == NULL)
1775 return;
1776
1777 mwl8k_txq_reclaim(hw, index, INT_MAX, 1);
1778
1779 kfree(txq->skb);
1780 txq->skb = NULL;
1781
1782 dma_free_coherent(&priv->pdev->dev,
1783 MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc),
1784 txq->txd, txq->txd_dma);
1785 txq->txd = NULL;
1786 }
1787
1788 /* caller must hold priv->stream_lock when calling the stream functions */
1789 static struct mwl8k_ampdu_stream *
1790 mwl8k_add_stream(struct ieee80211_hw *hw, struct ieee80211_sta *sta, u8 tid)
1791 {
1792 struct mwl8k_ampdu_stream *stream;
1793 struct mwl8k_priv *priv = hw->priv;
1794 int i;
1795
1796 for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
1797 stream = &priv->ampdu[i];
1798 if (stream->state == AMPDU_NO_STREAM) {
1799 stream->sta = sta;
1800 stream->state = AMPDU_STREAM_NEW;
1801 stream->tid = tid;
1802 stream->idx = i;
1803 wiphy_debug(hw->wiphy, "Added a new stream for %pM %d",
1804 sta->addr, tid);
1805 return stream;
1806 }
1807 }
1808 return NULL;
1809 }
1810
1811 static int
1812 mwl8k_start_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream)
1813 {
1814 int ret;
1815
1816 /* if the stream has already been started, don't start it again */
1817 if (stream->state != AMPDU_STREAM_NEW)
1818 return 0;
1819 ret = ieee80211_start_tx_ba_session(stream->sta, stream->tid, 0);
1820 if (ret)
1821 wiphy_debug(hw->wiphy, "Failed to start stream for %pM %d: "
1822 "%d\n", stream->sta->addr, stream->tid, ret);
1823 else
1824 wiphy_debug(hw->wiphy, "Started stream for %pM %d\n",
1825 stream->sta->addr, stream->tid);
1826 return ret;
1827 }
1828
1829 static void
1830 mwl8k_remove_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream)
1831 {
1832 wiphy_debug(hw->wiphy, "Remove stream for %pM %d\n", stream->sta->addr,
1833 stream->tid);
1834 memset(stream, 0, sizeof(*stream));
1835 }
1836
1837 static struct mwl8k_ampdu_stream *
1838 mwl8k_lookup_stream(struct ieee80211_hw *hw, u8 *addr, u8 tid)
1839 {
1840 struct mwl8k_priv *priv = hw->priv;
1841 int i;
1842
1843 for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
1844 struct mwl8k_ampdu_stream *stream;
1845 stream = &priv->ampdu[i];
1846 if (stream->state == AMPDU_NO_STREAM)
1847 continue;
1848 if (!memcmp(stream->sta->addr, addr, ETH_ALEN) &&
1849 stream->tid == tid)
1850 return stream;
1851 }
1852 return NULL;
1853 }
1854
1855 #define MWL8K_AMPDU_PACKET_THRESHOLD 64
1856 static inline bool mwl8k_ampdu_allowed(struct ieee80211_sta *sta, u8 tid)
1857 {
1858 struct mwl8k_sta *sta_info = MWL8K_STA(sta);
1859 struct tx_traffic_info *tx_stats;
1860
1861 BUG_ON(tid >= MWL8K_MAX_TID);
1862 tx_stats = &sta_info->tx_stats[tid];
1863
1864 return sta_info->is_ampdu_allowed &&
1865 tx_stats->pkts > MWL8K_AMPDU_PACKET_THRESHOLD;
1866 }
1867
1868 static inline void mwl8k_tx_count_packet(struct ieee80211_sta *sta, u8 tid)
1869 {
1870 struct mwl8k_sta *sta_info = MWL8K_STA(sta);
1871 struct tx_traffic_info *tx_stats;
1872
1873 BUG_ON(tid >= MWL8K_MAX_TID);
1874 tx_stats = &sta_info->tx_stats[tid];
1875
1876 if (tx_stats->start_time == 0)
1877 tx_stats->start_time = jiffies;
1878
1879 /* reset the packet count after each second elapses. If the number of
1880 * packets ever exceeds the ampdu_min_traffic threshold, we will allow
1881 * an ampdu stream to be started.
1882 */
1883 if (jiffies - tx_stats->start_time > HZ) {
1884 tx_stats->pkts = 0;
1885 tx_stats->start_time = 0;
1886 } else
1887 tx_stats->pkts++;
1888 }
1889
1890 /* The hardware ampdu queues start from 5.
1891 * txpriorities for ampdu queues are
1892 * 5 6 7 0 1 2 3 4 ie., queue 5 is highest
1893 * and queue 3 is lowest (queue 4 is reserved)
1894 */
1895 #define BA_QUEUE 5
1896
1897 static void
1898 mwl8k_txq_xmit(struct ieee80211_hw *hw,
1899 int index,
1900 struct ieee80211_sta *sta,
1901 struct sk_buff *skb)
1902 {
1903 struct mwl8k_priv *priv = hw->priv;
1904 struct ieee80211_tx_info *tx_info;
1905 struct mwl8k_vif *mwl8k_vif;
1906 struct ieee80211_hdr *wh;
1907 struct mwl8k_tx_queue *txq;
1908 struct mwl8k_tx_desc *tx;
1909 dma_addr_t dma;
1910 u32 txstatus;
1911 u8 txdatarate;
1912 u16 qos;
1913 int txpriority;
1914 u8 tid = 0;
1915 struct mwl8k_ampdu_stream *stream = NULL;
1916 bool start_ba_session = false;
1917 bool mgmtframe = false;
1918 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
1919 bool eapol_frame = false;
1920
1921 wh = (struct ieee80211_hdr *)skb->data;
1922 if (ieee80211_is_data_qos(wh->frame_control))
1923 qos = le16_to_cpu(*((__le16 *)ieee80211_get_qos_ctl(wh)));
1924 else
1925 qos = 0;
1926
1927 if (skb->protocol == cpu_to_be16(ETH_P_PAE))
1928 eapol_frame = true;
1929
1930 if (ieee80211_is_mgmt(wh->frame_control))
1931 mgmtframe = true;
1932
1933 if (priv->ap_fw)
1934 mwl8k_encapsulate_tx_frame(priv, skb);
1935 else
1936 mwl8k_add_dma_header(priv, skb, 0, 0);
1937
1938 wh = &((struct mwl8k_dma_data *)skb->data)->wh;
1939
1940 tx_info = IEEE80211_SKB_CB(skb);
1941 mwl8k_vif = MWL8K_VIF(tx_info->control.vif);
1942
1943 if (tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1944 wh->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1945 wh->seq_ctrl |= cpu_to_le16(mwl8k_vif->seqno);
1946 mwl8k_vif->seqno += 0x10;
1947 }
1948
1949 /* Setup firmware control bit fields for each frame type. */
1950 txstatus = 0;
1951 txdatarate = 0;
1952 if (ieee80211_is_mgmt(wh->frame_control) ||
1953 ieee80211_is_ctl(wh->frame_control)) {
1954 txdatarate = 0;
1955 qos |= MWL8K_QOS_QLEN_UNSPEC | MWL8K_QOS_EOSP;
1956 } else if (ieee80211_is_data(wh->frame_control)) {
1957 txdatarate = 1;
1958 if (is_multicast_ether_addr(wh->addr1))
1959 txstatus |= MWL8K_TXD_STATUS_MULTICAST_TX;
1960
1961 qos &= ~MWL8K_QOS_ACK_POLICY_MASK;
1962 if (tx_info->flags & IEEE80211_TX_CTL_AMPDU)
1963 qos |= MWL8K_QOS_ACK_POLICY_BLOCKACK;
1964 else
1965 qos |= MWL8K_QOS_ACK_POLICY_NORMAL;
1966 }
1967
1968 /* Queue ADDBA request in the respective data queue. While setting up
1969 * the ampdu stream, mac80211 queues further packets for that
1970 * particular ra/tid pair. However, packets piled up in the hardware
1971 * for that ra/tid pair will still go out. ADDBA request and the
1972 * related data packets going out from different queues asynchronously
1973 * will cause a shift in the receiver window which might result in
1974 * ampdu packets getting dropped at the receiver after the stream has
1975 * been setup.
1976 */
1977 if (unlikely(ieee80211_is_action(wh->frame_control) &&
1978 mgmt->u.action.category == WLAN_CATEGORY_BACK &&
1979 mgmt->u.action.u.addba_req.action_code == WLAN_ACTION_ADDBA_REQ &&
1980 priv->ap_fw)) {
1981 u16 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1982 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1983 index = mwl8k_tid_queue_mapping(tid);
1984 }
1985
1986 txpriority = index;
1987
1988 if (priv->ap_fw && sta && sta->ht_cap.ht_supported && !eapol_frame &&
1989 ieee80211_is_data_qos(wh->frame_control)) {
1990 tid = qos & 0xf;
1991 mwl8k_tx_count_packet(sta, tid);
1992 spin_lock(&priv->stream_lock);
1993 stream = mwl8k_lookup_stream(hw, sta->addr, tid);
1994 if (stream != NULL) {
1995 if (stream->state == AMPDU_STREAM_ACTIVE) {
1996 WARN_ON(!(qos & MWL8K_QOS_ACK_POLICY_BLOCKACK));
1997 txpriority = (BA_QUEUE + stream->idx) %
1998 TOTAL_HW_TX_QUEUES;
1999 if (stream->idx <= 1)
2000 index = stream->idx +
2001 MWL8K_TX_WMM_QUEUES;
2002
2003 } else if (stream->state == AMPDU_STREAM_NEW) {
2004 /* We get here if the driver sends us packets
2005 * after we've initiated a stream, but before
2006 * our ampdu_action routine has been called
2007 * with IEEE80211_AMPDU_TX_START to get the SSN
2008 * for the ADDBA request. So this packet can
2009 * go out with no risk of sequence number
2010 * mismatch. No special handling is required.
2011 */
2012 } else {
2013 /* Drop packets that would go out after the
2014 * ADDBA request was sent but before the ADDBA
2015 * response is received. If we don't do this,
2016 * the recipient would probably receive it
2017 * after the ADDBA request with SSN 0. This
2018 * will cause the recipient's BA receive window
2019 * to shift, which would cause the subsequent
2020 * packets in the BA stream to be discarded.
2021 * mac80211 queues our packets for us in this
2022 * case, so this is really just a safety check.
2023 */
2024 wiphy_warn(hw->wiphy,
2025 "Cannot send packet while ADDBA "
2026 "dialog is underway.\n");
2027 spin_unlock(&priv->stream_lock);
2028 dev_kfree_skb(skb);
2029 return;
2030 }
2031 } else {
2032 /* Defer calling mwl8k_start_stream so that the current
2033 * skb can go out before the ADDBA request. This
2034 * prevents sequence number mismatch at the recepient
2035 * as described above.
2036 */
2037 if (mwl8k_ampdu_allowed(sta, tid)) {
2038 stream = mwl8k_add_stream(hw, sta, tid);
2039 if (stream != NULL)
2040 start_ba_session = true;
2041 }
2042 }
2043 spin_unlock(&priv->stream_lock);
2044 } else {
2045 qos &= ~MWL8K_QOS_ACK_POLICY_MASK;
2046 qos |= MWL8K_QOS_ACK_POLICY_NORMAL;
2047 }
2048
2049 dma = dma_map_single(&priv->pdev->dev, skb->data, skb->len,
2050 DMA_TO_DEVICE);
2051
2052 if (dma_mapping_error(&priv->pdev->dev, dma)) {
2053 wiphy_debug(hw->wiphy,
2054 "failed to dma map skb, dropping TX frame.\n");
2055 if (start_ba_session) {
2056 spin_lock(&priv->stream_lock);
2057 mwl8k_remove_stream(hw, stream);
2058 spin_unlock(&priv->stream_lock);
2059 }
2060 dev_kfree_skb(skb);
2061 return;
2062 }
2063
2064 spin_lock_bh(&priv->tx_lock);
2065
2066 txq = priv->txq + index;
2067
2068 /* Mgmt frames that go out frequently are probe
2069 * responses. Other mgmt frames got out relatively
2070 * infrequently. Hence reserve 2 buffers so that
2071 * other mgmt frames do not get dropped due to an
2072 * already queued probe response in one of the
2073 * reserved buffers.
2074 */
2075
2076 if (txq->len >= MWL8K_TX_DESCS - 2) {
2077 if (!mgmtframe || txq->len == MWL8K_TX_DESCS) {
2078 if (start_ba_session) {
2079 spin_lock(&priv->stream_lock);
2080 mwl8k_remove_stream(hw, stream);
2081 spin_unlock(&priv->stream_lock);
2082 }
2083 mwl8k_tx_start(priv);
2084 spin_unlock_bh(&priv->tx_lock);
2085 dma_unmap_single(&priv->pdev->dev, dma, skb->len,
2086 DMA_TO_DEVICE);
2087 dev_kfree_skb(skb);
2088 return;
2089 }
2090 }
2091
2092 BUG_ON(txq->skb[txq->tail] != NULL);
2093 txq->skb[txq->tail] = skb;
2094
2095 tx = txq->txd + txq->tail;
2096 tx->data_rate = txdatarate;
2097 tx->tx_priority = txpriority;
2098 tx->qos_control = cpu_to_le16(qos);
2099 tx->pkt_phys_addr = cpu_to_le32(dma);
2100 tx->pkt_len = cpu_to_le16(skb->len);
2101 tx->rate_info = 0;
2102 if (!priv->ap_fw && sta != NULL)
2103 tx->peer_id = MWL8K_STA(sta)->peer_id;
2104 else
2105 tx->peer_id = 0;
2106
2107 if (priv->ap_fw && ieee80211_is_data(wh->frame_control) && !eapol_frame)
2108 tx->timestamp = cpu_to_le32(ioread32(priv->regs +
2109 MWL8K_HW_TIMER_REGISTER));
2110 else
2111 tx->timestamp = 0;
2112
2113 wmb();
2114 tx->status = cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED | txstatus);
2115
2116 txq->len++;
2117 priv->pending_tx_pkts++;
2118
2119 txq->tail++;
2120 if (txq->tail == MWL8K_TX_DESCS)
2121 txq->tail = 0;
2122
2123 mwl8k_tx_start(priv);
2124
2125 spin_unlock_bh(&priv->tx_lock);
2126
2127 /* Initiate the ampdu session here */
2128 if (start_ba_session) {
2129 spin_lock(&priv->stream_lock);
2130 if (mwl8k_start_stream(hw, stream))
2131 mwl8k_remove_stream(hw, stream);
2132 spin_unlock(&priv->stream_lock);
2133 }
2134 }
2135
2136
2137 /*
2138 * Firmware access.
2139 *
2140 * We have the following requirements for issuing firmware commands:
2141 * - Some commands require that the packet transmit path is idle when
2142 * the command is issued. (For simplicity, we'll just quiesce the
2143 * transmit path for every command.)
2144 * - There are certain sequences of commands that need to be issued to
2145 * the hardware sequentially, with no other intervening commands.
2146 *
2147 * This leads to an implementation of a "firmware lock" as a mutex that
2148 * can be taken recursively, and which is taken by both the low-level
2149 * command submission function (mwl8k_post_cmd) as well as any users of
2150 * that function that require issuing of an atomic sequence of commands,
2151 * and quiesces the transmit path whenever it's taken.
2152 */
2153 static int mwl8k_fw_lock(struct ieee80211_hw *hw)
2154 {
2155 struct mwl8k_priv *priv = hw->priv;
2156
2157 if (priv->fw_mutex_owner != current) {
2158 int rc;
2159
2160 mutex_lock(&priv->fw_mutex);
2161 ieee80211_stop_queues(hw);
2162
2163 rc = mwl8k_tx_wait_empty(hw);
2164 if (rc) {
2165 if (!priv->hw_restart_in_progress)
2166 ieee80211_wake_queues(hw);
2167
2168 mutex_unlock(&priv->fw_mutex);
2169
2170 return rc;
2171 }
2172
2173 priv->fw_mutex_owner = current;
2174 }
2175
2176 priv->fw_mutex_depth++;
2177
2178 return 0;
2179 }
2180
2181 static void mwl8k_fw_unlock(struct ieee80211_hw *hw)
2182 {
2183 struct mwl8k_priv *priv = hw->priv;
2184
2185 if (!--priv->fw_mutex_depth) {
2186 if (!priv->hw_restart_in_progress)
2187 ieee80211_wake_queues(hw);
2188
2189 priv->fw_mutex_owner = NULL;
2190 mutex_unlock(&priv->fw_mutex);
2191 }
2192 }
2193
2194 static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable,
2195 u32 bitmap);
2196
2197 /*
2198 * Command processing.
2199 */
2200
2201 /* Timeout firmware commands after 10s */
2202 #define MWL8K_CMD_TIMEOUT_MS 10000
2203
2204 static int mwl8k_post_cmd(struct ieee80211_hw *hw, struct mwl8k_cmd_pkt *cmd)
2205 {
2206 DECLARE_COMPLETION_ONSTACK(cmd_wait);
2207 struct mwl8k_priv *priv = hw->priv;
2208 void __iomem *regs = priv->regs;
2209 dma_addr_t dma_addr;
2210 unsigned int dma_size;
2211 int rc;
2212 unsigned long timeout = 0;
2213 u8 buf[32];
2214 u32 bitmap = 0;
2215
2216 wiphy_dbg(hw->wiphy, "Posting %s [%d]\n",
2217 mwl8k_cmd_name(cmd->code, buf, sizeof(buf)), cmd->macid);
2218
2219 /* Before posting firmware commands that could change the hardware
2220 * characteristics, make sure that all BSSes are stopped temporary.
2221 * Enable these stopped BSSes after completion of the commands
2222 */
2223
2224 rc = mwl8k_fw_lock(hw);
2225 if (rc)
2226 return rc;
2227
2228 if (priv->ap_fw && priv->running_bsses) {
2229 switch (le16_to_cpu(cmd->code)) {
2230 case MWL8K_CMD_SET_RF_CHANNEL:
2231 case MWL8K_CMD_RADIO_CONTROL:
2232 case MWL8K_CMD_RF_TX_POWER:
2233 case MWL8K_CMD_TX_POWER:
2234 case MWL8K_CMD_RF_ANTENNA:
2235 case MWL8K_CMD_RTS_THRESHOLD:
2236 case MWL8K_CMD_MIMO_CONFIG:
2237 bitmap = priv->running_bsses;
2238 mwl8k_enable_bsses(hw, false, bitmap);
2239 break;
2240 }
2241 }
2242
2243 cmd->result = (__force __le16) 0xffff;
2244 dma_size = le16_to_cpu(cmd->length);
2245 dma_addr = dma_map_single(&priv->pdev->dev, cmd, dma_size,
2246 DMA_BIDIRECTIONAL);
2247 if (dma_mapping_error(&priv->pdev->dev, dma_addr)) {
2248 rc = -ENOMEM;
2249 goto exit;
2250 }
2251
2252 priv->hostcmd_wait = &cmd_wait;
2253 iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
2254 iowrite32(MWL8K_H2A_INT_DOORBELL,
2255 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
2256 iowrite32(MWL8K_H2A_INT_DUMMY,
2257 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
2258
2259 timeout = wait_for_completion_timeout(&cmd_wait,
2260 msecs_to_jiffies(MWL8K_CMD_TIMEOUT_MS));
2261
2262 priv->hostcmd_wait = NULL;
2263
2264
2265 dma_unmap_single(&priv->pdev->dev, dma_addr, dma_size,
2266 DMA_BIDIRECTIONAL);
2267
2268 if (!timeout) {
2269 wiphy_err(hw->wiphy, "Command %s timeout after %u ms\n",
2270 mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
2271 MWL8K_CMD_TIMEOUT_MS);
2272 rc = -ETIMEDOUT;
2273 } else {
2274 int ms;
2275
2276 ms = MWL8K_CMD_TIMEOUT_MS - jiffies_to_msecs(timeout);
2277
2278 rc = cmd->result ? -EINVAL : 0;
2279 if (rc)
2280 wiphy_err(hw->wiphy, "Command %s error 0x%x\n",
2281 mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
2282 le16_to_cpu(cmd->result));
2283 else if (ms > 2000)
2284 wiphy_notice(hw->wiphy, "Command %s took %d ms\n",
2285 mwl8k_cmd_name(cmd->code,
2286 buf, sizeof(buf)),
2287 ms);
2288 }
2289
2290 exit:
2291 if (bitmap)
2292 mwl8k_enable_bsses(hw, true, bitmap);
2293
2294 mwl8k_fw_unlock(hw);
2295
2296 return rc;
2297 }
2298
2299 static int mwl8k_post_pervif_cmd(struct ieee80211_hw *hw,
2300 struct ieee80211_vif *vif,
2301 struct mwl8k_cmd_pkt *cmd)
2302 {
2303 if (vif != NULL)
2304 cmd->macid = MWL8K_VIF(vif)->macid;
2305 return mwl8k_post_cmd(hw, cmd);
2306 }
2307
2308 /*
2309 * Setup code shared between STA and AP firmware images.
2310 */
2311 static void mwl8k_setup_2ghz_band(struct ieee80211_hw *hw)
2312 {
2313 struct mwl8k_priv *priv = hw->priv;
2314
2315 BUILD_BUG_ON(sizeof(priv->channels_24) != sizeof(mwl8k_channels_24));
2316 memcpy(priv->channels_24, mwl8k_channels_24, sizeof(mwl8k_channels_24));
2317
2318 BUILD_BUG_ON(sizeof(priv->rates_24) != sizeof(mwl8k_rates_24));
2319 memcpy(priv->rates_24, mwl8k_rates_24, sizeof(mwl8k_rates_24));
2320
2321 priv->band_24.band = NL80211_BAND_2GHZ;
2322 priv->band_24.channels = priv->channels_24;
2323 priv->band_24.n_channels = ARRAY_SIZE(mwl8k_channels_24);
2324 priv->band_24.bitrates = priv->rates_24;
2325 priv->band_24.n_bitrates = ARRAY_SIZE(mwl8k_rates_24);
2326
2327 hw->wiphy->bands[NL80211_BAND_2GHZ] = &priv->band_24;
2328 }
2329
2330 static void mwl8k_setup_5ghz_band(struct ieee80211_hw *hw)
2331 {
2332 struct mwl8k_priv *priv = hw->priv;
2333
2334 BUILD_BUG_ON(sizeof(priv->channels_50) != sizeof(mwl8k_channels_50));
2335 memcpy(priv->channels_50, mwl8k_channels_50, sizeof(mwl8k_channels_50));
2336
2337 BUILD_BUG_ON(sizeof(priv->rates_50) != sizeof(mwl8k_rates_50));
2338 memcpy(priv->rates_50, mwl8k_rates_50, sizeof(mwl8k_rates_50));
2339
2340 priv->band_50.band = NL80211_BAND_5GHZ;
2341 priv->band_50.channels = priv->channels_50;
2342 priv->band_50.n_channels = ARRAY_SIZE(mwl8k_channels_50);
2343 priv->band_50.bitrates = priv->rates_50;
2344 priv->band_50.n_bitrates = ARRAY_SIZE(mwl8k_rates_50);
2345
2346 hw->wiphy->bands[NL80211_BAND_5GHZ] = &priv->band_50;
2347 }
2348
2349 /*
2350 * CMD_GET_HW_SPEC (STA version).
2351 */
2352 struct mwl8k_cmd_get_hw_spec_sta {
2353 struct mwl8k_cmd_pkt header;
2354 __u8 hw_rev;
2355 __u8 host_interface;
2356 __le16 num_mcaddrs;
2357 __u8 perm_addr[ETH_ALEN];
2358 __le16 region_code;
2359 __le32 fw_rev;
2360 __le32 ps_cookie;
2361 __le32 caps;
2362 __u8 mcs_bitmap[16];
2363 __le32 rx_queue_ptr;
2364 __le32 num_tx_queues;
2365 __le32 tx_queue_ptrs[MWL8K_TX_WMM_QUEUES];
2366 __le32 caps2;
2367 __le32 num_tx_desc_per_queue;
2368 __le32 total_rxd;
2369 } __packed;
2370
2371 #define MWL8K_CAP_MAX_AMSDU 0x20000000
2372 #define MWL8K_CAP_GREENFIELD 0x08000000
2373 #define MWL8K_CAP_AMPDU 0x04000000
2374 #define MWL8K_CAP_RX_STBC 0x01000000
2375 #define MWL8K_CAP_TX_STBC 0x00800000
2376 #define MWL8K_CAP_SHORTGI_40MHZ 0x00400000
2377 #define MWL8K_CAP_SHORTGI_20MHZ 0x00200000
2378 #define MWL8K_CAP_RX_ANTENNA_MASK 0x000e0000
2379 #define MWL8K_CAP_TX_ANTENNA_MASK 0x0001c000
2380 #define MWL8K_CAP_DELAY_BA 0x00003000
2381 #define MWL8K_CAP_MIMO 0x00000200
2382 #define MWL8K_CAP_40MHZ 0x00000100
2383 #define MWL8K_CAP_BAND_MASK 0x00000007
2384 #define MWL8K_CAP_5GHZ 0x00000004
2385 #define MWL8K_CAP_2GHZ4 0x00000001
2386
2387 static void
2388 mwl8k_set_ht_caps(struct ieee80211_hw *hw,
2389 struct ieee80211_supported_band *band, u32 cap)
2390 {
2391 int rx_streams;
2392 int tx_streams;
2393
2394 band->ht_cap.ht_supported = 1;
2395
2396 if (cap & MWL8K_CAP_MAX_AMSDU)
2397 band->ht_cap.cap |= IEEE80211_HT_CAP_MAX_AMSDU;
2398 if (cap & MWL8K_CAP_GREENFIELD)
2399 band->ht_cap.cap |= IEEE80211_HT_CAP_GRN_FLD;
2400 if (cap & MWL8K_CAP_AMPDU) {
2401 ieee80211_hw_set(hw, AMPDU_AGGREGATION);
2402 band->ht_cap.ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
2403 band->ht_cap.ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE;
2404 }
2405 if (cap & MWL8K_CAP_RX_STBC)
2406 band->ht_cap.cap |= IEEE80211_HT_CAP_RX_STBC;
2407 if (cap & MWL8K_CAP_TX_STBC)
2408 band->ht_cap.cap |= IEEE80211_HT_CAP_TX_STBC;
2409 if (cap & MWL8K_CAP_SHORTGI_40MHZ)
2410 band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_40;
2411 if (cap & MWL8K_CAP_SHORTGI_20MHZ)
2412 band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_20;
2413 if (cap & MWL8K_CAP_DELAY_BA)
2414 band->ht_cap.cap |= IEEE80211_HT_CAP_DELAY_BA;
2415 if (cap & MWL8K_CAP_40MHZ)
2416 band->ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2417
2418 rx_streams = hweight32(cap & MWL8K_CAP_RX_ANTENNA_MASK);
2419 tx_streams = hweight32(cap & MWL8K_CAP_TX_ANTENNA_MASK);
2420
2421 band->ht_cap.mcs.rx_mask[0] = 0xff;
2422 if (rx_streams >= 2)
2423 band->ht_cap.mcs.rx_mask[1] = 0xff;
2424 if (rx_streams >= 3)
2425 band->ht_cap.mcs.rx_mask[2] = 0xff;
2426 band->ht_cap.mcs.rx_mask[4] = 0x01;
2427 band->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
2428
2429 if (rx_streams != tx_streams) {
2430 band->ht_cap.mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
2431 band->ht_cap.mcs.tx_params |= (tx_streams - 1) <<
2432 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2433 }
2434 }
2435
2436 static void
2437 mwl8k_set_caps(struct ieee80211_hw *hw, u32 caps)
2438 {
2439 struct mwl8k_priv *priv = hw->priv;
2440
2441 if (priv->caps)
2442 return;
2443
2444 if ((caps & MWL8K_CAP_2GHZ4) || !(caps & MWL8K_CAP_BAND_MASK)) {
2445 mwl8k_setup_2ghz_band(hw);
2446 if (caps & MWL8K_CAP_MIMO)
2447 mwl8k_set_ht_caps(hw, &priv->band_24, caps);
2448 }
2449
2450 if (caps & MWL8K_CAP_5GHZ) {
2451 mwl8k_setup_5ghz_band(hw);
2452 if (caps & MWL8K_CAP_MIMO)
2453 mwl8k_set_ht_caps(hw, &priv->band_50, caps);
2454 }
2455
2456 priv->caps = caps;
2457 }
2458
2459 static int mwl8k_cmd_get_hw_spec_sta(struct ieee80211_hw *hw)
2460 {
2461 struct mwl8k_priv *priv = hw->priv;
2462 struct mwl8k_cmd_get_hw_spec_sta *cmd;
2463 int rc;
2464 int i;
2465
2466 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2467 if (cmd == NULL)
2468 return -ENOMEM;
2469
2470 cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
2471 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2472
2473 memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
2474 cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2475 cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma);
2476 cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv));
2477 for (i = 0; i < mwl8k_tx_queues(priv); i++)
2478 cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[i].txd_dma);
2479 cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
2480 cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS);
2481
2482 rc = mwl8k_post_cmd(hw, &cmd->header);
2483
2484 if (!rc) {
2485 SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
2486 priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
2487 priv->fw_rev = le32_to_cpu(cmd->fw_rev);
2488 priv->hw_rev = cmd->hw_rev;
2489 mwl8k_set_caps(hw, le32_to_cpu(cmd->caps));
2490 priv->ap_macids_supported = 0x00000000;
2491 priv->sta_macids_supported = 0x00000001;
2492 }
2493
2494 kfree(cmd);
2495 return rc;
2496 }
2497
2498 /*
2499 * CMD_GET_HW_SPEC (AP version).
2500 */
2501 struct mwl8k_cmd_get_hw_spec_ap {
2502 struct mwl8k_cmd_pkt header;
2503 __u8 hw_rev;
2504 __u8 host_interface;
2505 __le16 num_wcb;
2506 __le16 num_mcaddrs;
2507 __u8 perm_addr[ETH_ALEN];
2508 __le16 region_code;
2509 __le16 num_antenna;
2510 __le32 fw_rev;
2511 __le32 wcbbase0;
2512 __le32 rxwrptr;
2513 __le32 rxrdptr;
2514 __le32 ps_cookie;
2515 __le32 wcbbase1;
2516 __le32 wcbbase2;
2517 __le32 wcbbase3;
2518 __le32 fw_api_version;
2519 __le32 caps;
2520 __le32 num_of_ampdu_queues;
2521 __le32 wcbbase_ampdu[MWL8K_MAX_AMPDU_QUEUES];
2522 } __packed;
2523
2524 static int mwl8k_cmd_get_hw_spec_ap(struct ieee80211_hw *hw)
2525 {
2526 struct mwl8k_priv *priv = hw->priv;
2527 struct mwl8k_cmd_get_hw_spec_ap *cmd;
2528 int rc, i;
2529 u32 api_version;
2530
2531 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2532 if (cmd == NULL)
2533 return -ENOMEM;
2534
2535 cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
2536 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2537
2538 memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
2539 cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2540
2541 rc = mwl8k_post_cmd(hw, &cmd->header);
2542
2543 if (!rc) {
2544 int off;
2545
2546 api_version = le32_to_cpu(cmd->fw_api_version);
2547 if (priv->device_info->fw_api_ap != api_version) {
2548 printk(KERN_ERR "%s: Unsupported fw API version for %s."
2549 " Expected %d got %d.\n", MWL8K_NAME,
2550 priv->device_info->part_name,
2551 priv->device_info->fw_api_ap,
2552 api_version);
2553 rc = -EINVAL;
2554 goto done;
2555 }
2556 SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
2557 priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
2558 priv->fw_rev = le32_to_cpu(cmd->fw_rev);
2559 priv->hw_rev = cmd->hw_rev;
2560 mwl8k_set_caps(hw, le32_to_cpu(cmd->caps));
2561 priv->ap_macids_supported = 0x000000ff;
2562 priv->sta_macids_supported = 0x00000100;
2563 priv->num_ampdu_queues = le32_to_cpu(cmd->num_of_ampdu_queues);
2564 if (priv->num_ampdu_queues > MWL8K_MAX_AMPDU_QUEUES) {
2565 wiphy_warn(hw->wiphy, "fw reported %d ampdu queues"
2566 " but we only support %d.\n",
2567 priv->num_ampdu_queues,
2568 MWL8K_MAX_AMPDU_QUEUES);
2569 priv->num_ampdu_queues = MWL8K_MAX_AMPDU_QUEUES;
2570 }
2571 off = le32_to_cpu(cmd->rxwrptr) & 0xffff;
2572 iowrite32(priv->rxq[0].rxd_dma, priv->sram + off);
2573
2574 off = le32_to_cpu(cmd->rxrdptr) & 0xffff;
2575 iowrite32(priv->rxq[0].rxd_dma, priv->sram + off);
2576
2577 priv->txq_offset[0] = le32_to_cpu(cmd->wcbbase0) & 0xffff;
2578 priv->txq_offset[1] = le32_to_cpu(cmd->wcbbase1) & 0xffff;
2579 priv->txq_offset[2] = le32_to_cpu(cmd->wcbbase2) & 0xffff;
2580 priv->txq_offset[3] = le32_to_cpu(cmd->wcbbase3) & 0xffff;
2581
2582 for (i = 0; i < priv->num_ampdu_queues; i++)
2583 priv->txq_offset[i + MWL8K_TX_WMM_QUEUES] =
2584 le32_to_cpu(cmd->wcbbase_ampdu[i]) & 0xffff;
2585 }
2586
2587 done:
2588 kfree(cmd);
2589 return rc;
2590 }
2591
2592 /*
2593 * CMD_SET_HW_SPEC.
2594 */
2595 struct mwl8k_cmd_set_hw_spec {
2596 struct mwl8k_cmd_pkt header;
2597 __u8 hw_rev;
2598 __u8 host_interface;
2599 __le16 num_mcaddrs;
2600 __u8 perm_addr[ETH_ALEN];
2601 __le16 region_code;
2602 __le32 fw_rev;
2603 __le32 ps_cookie;
2604 __le32 caps;
2605 __le32 rx_queue_ptr;
2606 __le32 num_tx_queues;
2607 __le32 tx_queue_ptrs[MWL8K_MAX_TX_QUEUES];
2608 __le32 flags;
2609 __le32 num_tx_desc_per_queue;
2610 __le32 total_rxd;
2611 } __packed;
2612
2613 /* If enabled, MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY will cause
2614 * packets to expire 500 ms after the timestamp in the tx descriptor. That is,
2615 * the packets that are queued for more than 500ms, will be dropped in the
2616 * hardware. This helps minimizing the issues caused due to head-of-line
2617 * blocking where a slow client can hog the bandwidth and affect traffic to a
2618 * faster client.
2619 */
2620 #define MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY 0x00000400
2621 #define MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR 0x00000200
2622 #define MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT 0x00000080
2623 #define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP 0x00000020
2624 #define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON 0x00000010
2625
2626 static int mwl8k_cmd_set_hw_spec(struct ieee80211_hw *hw)
2627 {
2628 struct mwl8k_priv *priv = hw->priv;
2629 struct mwl8k_cmd_set_hw_spec *cmd;
2630 int rc;
2631 int i;
2632
2633 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2634 if (cmd == NULL)
2635 return -ENOMEM;
2636
2637 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_HW_SPEC);
2638 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2639
2640 cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2641 cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma);
2642 cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv));
2643
2644 /*
2645 * Mac80211 stack has Q0 as highest priority and Q3 as lowest in
2646 * that order. Firmware has Q3 as highest priority and Q0 as lowest
2647 * in that order. Map Q3 of mac80211 to Q0 of firmware so that the
2648 * priority is interpreted the right way in firmware.
2649 */
2650 for (i = 0; i < mwl8k_tx_queues(priv); i++) {
2651 int j = mwl8k_tx_queues(priv) - 1 - i;
2652 cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[j].txd_dma);
2653 }
2654
2655 cmd->flags = cpu_to_le32(MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT |
2656 MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP |
2657 MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON |
2658 MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY |
2659 MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR);
2660 cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
2661 cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS);
2662
2663 rc = mwl8k_post_cmd(hw, &cmd->header);
2664 kfree(cmd);
2665
2666 return rc;
2667 }
2668
2669 /*
2670 * CMD_MAC_MULTICAST_ADR.
2671 */
2672 struct mwl8k_cmd_mac_multicast_adr {
2673 struct mwl8k_cmd_pkt header;
2674 __le16 action;
2675 __le16 numaddr;
2676 __u8 addr[][ETH_ALEN];
2677 };
2678
2679 #define MWL8K_ENABLE_RX_DIRECTED 0x0001
2680 #define MWL8K_ENABLE_RX_MULTICAST 0x0002
2681 #define MWL8K_ENABLE_RX_ALL_MULTICAST 0x0004
2682 #define MWL8K_ENABLE_RX_BROADCAST 0x0008
2683
2684 static struct mwl8k_cmd_pkt *
2685 __mwl8k_cmd_mac_multicast_adr(struct ieee80211_hw *hw, int allmulti,
2686 struct netdev_hw_addr_list *mc_list)
2687 {
2688 struct mwl8k_priv *priv = hw->priv;
2689 struct mwl8k_cmd_mac_multicast_adr *cmd;
2690 int size;
2691 int mc_count = 0;
2692
2693 if (mc_list)
2694 mc_count = netdev_hw_addr_list_count(mc_list);
2695
2696 if (allmulti || mc_count > priv->num_mcaddrs) {
2697 allmulti = 1;
2698 mc_count = 0;
2699 }
2700
2701 size = sizeof(*cmd) + mc_count * ETH_ALEN;
2702
2703 cmd = kzalloc(size, GFP_ATOMIC);
2704 if (cmd == NULL)
2705 return NULL;
2706
2707 cmd->header.code = cpu_to_le16(MWL8K_CMD_MAC_MULTICAST_ADR);
2708 cmd->header.length = cpu_to_le16(size);
2709 cmd->action = cpu_to_le16(MWL8K_ENABLE_RX_DIRECTED |
2710 MWL8K_ENABLE_RX_BROADCAST);
2711
2712 if (allmulti) {
2713 cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_ALL_MULTICAST);
2714 } else if (mc_count) {
2715 struct netdev_hw_addr *ha;
2716 int i = 0;
2717
2718 cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_MULTICAST);
2719 cmd->numaddr = cpu_to_le16(mc_count);
2720 netdev_hw_addr_list_for_each(ha, mc_list) {
2721 memcpy(cmd->addr[i], ha->addr, ETH_ALEN);
2722 }
2723 }
2724
2725 return &cmd->header;
2726 }
2727
2728 /*
2729 * CMD_GET_STAT.
2730 */
2731 struct mwl8k_cmd_get_stat {
2732 struct mwl8k_cmd_pkt header;
2733 __le32 stats[64];
2734 } __packed;
2735
2736 #define MWL8K_STAT_ACK_FAILURE 9
2737 #define MWL8K_STAT_RTS_FAILURE 12
2738 #define MWL8K_STAT_FCS_ERROR 24
2739 #define MWL8K_STAT_RTS_SUCCESS 11
2740
2741 static int mwl8k_cmd_get_stat(struct ieee80211_hw *hw,
2742 struct ieee80211_low_level_stats *stats)
2743 {
2744 struct mwl8k_cmd_get_stat *cmd;
2745 int rc;
2746
2747 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2748 if (cmd == NULL)
2749 return -ENOMEM;
2750
2751 cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_STAT);
2752 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2753
2754 rc = mwl8k_post_cmd(hw, &cmd->header);
2755 if (!rc) {
2756 stats->dot11ACKFailureCount =
2757 le32_to_cpu(cmd->stats[MWL8K_STAT_ACK_FAILURE]);
2758 stats->dot11RTSFailureCount =
2759 le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_FAILURE]);
2760 stats->dot11FCSErrorCount =
2761 le32_to_cpu(cmd->stats[MWL8K_STAT_FCS_ERROR]);
2762 stats->dot11RTSSuccessCount =
2763 le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_SUCCESS]);
2764 }
2765 kfree(cmd);
2766
2767 return rc;
2768 }
2769
2770 /*
2771 * CMD_RADIO_CONTROL.
2772 */
2773 struct mwl8k_cmd_radio_control {
2774 struct mwl8k_cmd_pkt header;
2775 __le16 action;
2776 __le16 control;
2777 __le16 radio_on;
2778 } __packed;
2779
2780 static int
2781 mwl8k_cmd_radio_control(struct ieee80211_hw *hw, bool enable, bool force)
2782 {
2783 struct mwl8k_priv *priv = hw->priv;
2784 struct mwl8k_cmd_radio_control *cmd;
2785 int rc;
2786
2787 if (enable == priv->radio_on && !force)
2788 return 0;
2789
2790 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2791 if (cmd == NULL)
2792 return -ENOMEM;
2793
2794 cmd->header.code = cpu_to_le16(MWL8K_CMD_RADIO_CONTROL);
2795 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2796 cmd->action = cpu_to_le16(MWL8K_CMD_SET);
2797 cmd->control = cpu_to_le16(priv->radio_short_preamble ? 3 : 1);
2798 cmd->radio_on = cpu_to_le16(enable ? 0x0001 : 0x0000);
2799
2800 rc = mwl8k_post_cmd(hw, &cmd->header);
2801 kfree(cmd);
2802
2803 if (!rc)
2804 priv->radio_on = enable;
2805
2806 return rc;
2807 }
2808
2809 static int mwl8k_cmd_radio_disable(struct ieee80211_hw *hw)
2810 {
2811 return mwl8k_cmd_radio_control(hw, 0, 0);
2812 }
2813
2814 static int mwl8k_cmd_radio_enable(struct ieee80211_hw *hw)
2815 {
2816 return mwl8k_cmd_radio_control(hw, 1, 0);
2817 }
2818
2819 static int
2820 mwl8k_set_radio_preamble(struct ieee80211_hw *hw, bool short_preamble)
2821 {
2822 struct mwl8k_priv *priv = hw->priv;
2823
2824 priv->radio_short_preamble = short_preamble;
2825
2826 return mwl8k_cmd_radio_control(hw, 1, 1);
2827 }
2828
2829 /*
2830 * CMD_RF_TX_POWER.
2831 */
2832 #define MWL8K_RF_TX_POWER_LEVEL_TOTAL 8
2833
2834 struct mwl8k_cmd_rf_tx_power {
2835 struct mwl8k_cmd_pkt header;
2836 __le16 action;
2837 __le16 support_level;
2838 __le16 current_level;
2839 __le16 reserved;
2840 __le16 power_level_list[MWL8K_RF_TX_POWER_LEVEL_TOTAL];
2841 } __packed;
2842
2843 static int mwl8k_cmd_rf_tx_power(struct ieee80211_hw *hw, int dBm)
2844 {
2845 struct mwl8k_cmd_rf_tx_power *cmd;
2846 int rc;
2847
2848 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2849 if (cmd == NULL)
2850 return -ENOMEM;
2851
2852 cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_TX_POWER);
2853 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2854 cmd->action = cpu_to_le16(MWL8K_CMD_SET);
2855 cmd->support_level = cpu_to_le16(dBm);
2856
2857 rc = mwl8k_post_cmd(hw, &cmd->header);
2858 kfree(cmd);
2859
2860 return rc;
2861 }
2862
2863 /*
2864 * CMD_TX_POWER.
2865 */
2866 #define MWL8K_TX_POWER_LEVEL_TOTAL 12
2867
2868 struct mwl8k_cmd_tx_power {
2869 struct mwl8k_cmd_pkt header;
2870 __le16 action;
2871 __le16 band;
2872 __le16 channel;
2873 __le16 bw;
2874 __le16 sub_ch;
2875 __le16 power_level_list[MWL8K_TX_POWER_LEVEL_TOTAL];
2876 } __packed;
2877
2878 static int mwl8k_cmd_tx_power(struct ieee80211_hw *hw,
2879 struct ieee80211_conf *conf,
2880 unsigned short pwr)
2881 {
2882 struct ieee80211_channel *channel = conf->chandef.chan;
2883 enum nl80211_channel_type channel_type =
2884 cfg80211_get_chandef_type(&conf->chandef);
2885 struct mwl8k_cmd_tx_power *cmd;
2886 int rc;
2887 int i;
2888
2889 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2890 if (cmd == NULL)
2891 return -ENOMEM;
2892
2893 cmd->header.code = cpu_to_le16(MWL8K_CMD_TX_POWER);
2894 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2895 cmd->action = cpu_to_le16(MWL8K_CMD_SET_LIST);
2896
2897 if (channel->band == NL80211_BAND_2GHZ)
2898 cmd->band = cpu_to_le16(0x1);
2899 else if (channel->band == NL80211_BAND_5GHZ)
2900 cmd->band = cpu_to_le16(0x4);
2901
2902 cmd->channel = cpu_to_le16(channel->hw_value);
2903
2904 if (channel_type == NL80211_CHAN_NO_HT ||
2905 channel_type == NL80211_CHAN_HT20) {
2906 cmd->bw = cpu_to_le16(0x2);
2907 } else {
2908 cmd->bw = cpu_to_le16(0x4);
2909 if (channel_type == NL80211_CHAN_HT40MINUS)
2910 cmd->sub_ch = cpu_to_le16(0x3);
2911 else if (channel_type == NL80211_CHAN_HT40PLUS)
2912 cmd->sub_ch = cpu_to_le16(0x1);
2913 }
2914
2915 for (i = 0; i < MWL8K_TX_POWER_LEVEL_TOTAL; i++)
2916 cmd->power_level_list[i] = cpu_to_le16(pwr);
2917
2918 rc = mwl8k_post_cmd(hw, &cmd->header);
2919 kfree(cmd);
2920
2921 return rc;
2922 }
2923
2924 /*
2925 * CMD_RF_ANTENNA.
2926 */
2927 struct mwl8k_cmd_rf_antenna {
2928 struct mwl8k_cmd_pkt header;
2929 __le16 antenna;
2930 __le16 mode;
2931 } __packed;
2932
2933 #define MWL8K_RF_ANTENNA_RX 1
2934 #define MWL8K_RF_ANTENNA_TX 2
2935
2936 static int
2937 mwl8k_cmd_rf_antenna(struct ieee80211_hw *hw, int antenna, int mask)
2938 {
2939 struct mwl8k_cmd_rf_antenna *cmd;
2940 int rc;
2941
2942 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2943 if (cmd == NULL)
2944 return -ENOMEM;
2945
2946 cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_ANTENNA);
2947 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2948 cmd->antenna = cpu_to_le16(antenna);
2949 cmd->mode = cpu_to_le16(mask);
2950
2951 rc = mwl8k_post_cmd(hw, &cmd->header);
2952 kfree(cmd);
2953
2954 return rc;
2955 }
2956
2957 /*
2958 * CMD_SET_BEACON.
2959 */
2960 struct mwl8k_cmd_set_beacon {
2961 struct mwl8k_cmd_pkt header;
2962 __le16 beacon_len;
2963 __u8 beacon[];
2964 };
2965
2966 static int mwl8k_cmd_set_beacon(struct ieee80211_hw *hw,
2967 struct ieee80211_vif *vif, u8 *beacon, int len)
2968 {
2969 struct mwl8k_cmd_set_beacon *cmd;
2970 int rc;
2971
2972 cmd = kzalloc(sizeof(*cmd) + len, GFP_KERNEL);
2973 if (cmd == NULL)
2974 return -ENOMEM;
2975
2976 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_BEACON);
2977 cmd->header.length = cpu_to_le16(sizeof(*cmd) + len);
2978 cmd->beacon_len = cpu_to_le16(len);
2979 memcpy(cmd->beacon, beacon, len);
2980
2981 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
2982 kfree(cmd);
2983
2984 return rc;
2985 }
2986
2987 /*
2988 * CMD_SET_PRE_SCAN.
2989 */
2990 struct mwl8k_cmd_set_pre_scan {
2991 struct mwl8k_cmd_pkt header;
2992 } __packed;
2993
2994 static int mwl8k_cmd_set_pre_scan(struct ieee80211_hw *hw)
2995 {
2996 struct mwl8k_cmd_set_pre_scan *cmd;
2997 int rc;
2998
2999 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3000 if (cmd == NULL)
3001 return -ENOMEM;
3002
3003 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_PRE_SCAN);
3004 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3005
3006 rc = mwl8k_post_cmd(hw, &cmd->header);
3007 kfree(cmd);
3008
3009 return rc;
3010 }
3011
3012 /*
3013 * CMD_BBP_REG_ACCESS.
3014 */
3015 struct mwl8k_cmd_bbp_reg_access {
3016 struct mwl8k_cmd_pkt header;
3017 __le16 action;
3018 __le16 offset;
3019 u8 value;
3020 u8 rsrv[3];
3021 } __packed;
3022
3023 static int
3024 mwl8k_cmd_bbp_reg_access(struct ieee80211_hw *hw,
3025 u16 action,
3026 u16 offset,
3027 u8 *value)
3028 {
3029 struct mwl8k_cmd_bbp_reg_access *cmd;
3030 int rc;
3031
3032 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3033 if (cmd == NULL)
3034 return -ENOMEM;
3035
3036 cmd->header.code = cpu_to_le16(MWL8K_CMD_BBP_REG_ACCESS);
3037 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3038 cmd->action = cpu_to_le16(action);
3039 cmd->offset = cpu_to_le16(offset);
3040
3041 rc = mwl8k_post_cmd(hw, &cmd->header);
3042
3043 if (!rc)
3044 *value = cmd->value;
3045 else
3046 *value = 0;
3047
3048 kfree(cmd);
3049
3050 return rc;
3051 }
3052
3053 /*
3054 * CMD_SET_POST_SCAN.
3055 */
3056 struct mwl8k_cmd_set_post_scan {
3057 struct mwl8k_cmd_pkt header;
3058 __le32 isibss;
3059 __u8 bssid[ETH_ALEN];
3060 } __packed;
3061
3062 static int
3063 mwl8k_cmd_set_post_scan(struct ieee80211_hw *hw, const __u8 *mac)
3064 {
3065 struct mwl8k_cmd_set_post_scan *cmd;
3066 int rc;
3067
3068 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3069 if (cmd == NULL)
3070 return -ENOMEM;
3071
3072 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_POST_SCAN);
3073 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3074 cmd->isibss = 0;
3075 memcpy(cmd->bssid, mac, ETH_ALEN);
3076
3077 rc = mwl8k_post_cmd(hw, &cmd->header);
3078 kfree(cmd);
3079
3080 return rc;
3081 }
3082
3083 static int freq_to_idx(struct mwl8k_priv *priv, int freq)
3084 {
3085 struct ieee80211_supported_band *sband;
3086 int band, ch, idx = 0;
3087
3088 for (band = NL80211_BAND_2GHZ; band < NUM_NL80211_BANDS; band++) {
3089 sband = priv->hw->wiphy->bands[band];
3090 if (!sband)
3091 continue;
3092
3093 for (ch = 0; ch < sband->n_channels; ch++, idx++)
3094 if (sband->channels[ch].center_freq == freq)
3095 goto exit;
3096 }
3097
3098 exit:
3099 return idx;
3100 }
3101
3102 static void mwl8k_update_survey(struct mwl8k_priv *priv,
3103 struct ieee80211_channel *channel)
3104 {
3105 u32 cca_cnt, rx_rdy;
3106 s8 nf = 0, idx;
3107 struct survey_info *survey;
3108
3109 idx = freq_to_idx(priv, priv->acs_chan->center_freq);
3110 if (idx >= MWL8K_NUM_CHANS) {
3111 wiphy_err(priv->hw->wiphy, "Failed to update survey\n");
3112 return;
3113 }
3114
3115 survey = &priv->survey[idx];
3116
3117 cca_cnt = ioread32(priv->regs + NOK_CCA_CNT_REG);
3118 cca_cnt /= 1000; /* uSecs to mSecs */
3119 survey->time_busy = (u64) cca_cnt;
3120
3121 rx_rdy = ioread32(priv->regs + BBU_RXRDY_CNT_REG);
3122 rx_rdy /= 1000; /* uSecs to mSecs */
3123 survey->time_rx = (u64) rx_rdy;
3124
3125 priv->channel_time = jiffies - priv->channel_time;
3126 survey->time = jiffies_to_msecs(priv->channel_time);
3127
3128 survey->channel = channel;
3129
3130 mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &nf);
3131
3132 /* Make sure sign is negative else ACS at hostapd fails */
3133 survey->noise = nf * -1;
3134
3135 survey->filled = SURVEY_INFO_NOISE_DBM |
3136 SURVEY_INFO_TIME |
3137 SURVEY_INFO_TIME_BUSY |
3138 SURVEY_INFO_TIME_RX;
3139 }
3140
3141 /*
3142 * CMD_SET_RF_CHANNEL.
3143 */
3144 struct mwl8k_cmd_set_rf_channel {
3145 struct mwl8k_cmd_pkt header;
3146 __le16 action;
3147 __u8 current_channel;
3148 __le32 channel_flags;
3149 } __packed;
3150
3151 static int mwl8k_cmd_set_rf_channel(struct ieee80211_hw *hw,
3152 struct ieee80211_conf *conf)
3153 {
3154 struct ieee80211_channel *channel = conf->chandef.chan;
3155 enum nl80211_channel_type channel_type =
3156 cfg80211_get_chandef_type(&conf->chandef);
3157 struct mwl8k_cmd_set_rf_channel *cmd;
3158 struct mwl8k_priv *priv = hw->priv;
3159 int rc;
3160
3161 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3162 if (cmd == NULL)
3163 return -ENOMEM;
3164
3165 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RF_CHANNEL);
3166 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3167 cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3168 cmd->current_channel = channel->hw_value;
3169
3170 if (channel->band == NL80211_BAND_2GHZ)
3171 cmd->channel_flags |= cpu_to_le32(0x00000001);
3172 else if (channel->band == NL80211_BAND_5GHZ)
3173 cmd->channel_flags |= cpu_to_le32(0x00000004);
3174
3175 if (!priv->sw_scan_start) {
3176 if (channel_type == NL80211_CHAN_NO_HT ||
3177 channel_type == NL80211_CHAN_HT20)
3178 cmd->channel_flags |= cpu_to_le32(0x00000080);
3179 else if (channel_type == NL80211_CHAN_HT40MINUS)
3180 cmd->channel_flags |= cpu_to_le32(0x000001900);
3181 else if (channel_type == NL80211_CHAN_HT40PLUS)
3182 cmd->channel_flags |= cpu_to_le32(0x000000900);
3183 } else {
3184 cmd->channel_flags |= cpu_to_le32(0x00000080);
3185 }
3186
3187 if (priv->sw_scan_start) {
3188 /* Store current channel stats
3189 * before switching to newer one.
3190 * This will be processed only for AP fw.
3191 */
3192 if (priv->channel_time != 0)
3193 mwl8k_update_survey(priv, priv->acs_chan);
3194
3195 priv->channel_time = jiffies;
3196 priv->acs_chan = channel;
3197 }
3198
3199 rc = mwl8k_post_cmd(hw, &cmd->header);
3200 kfree(cmd);
3201
3202 return rc;
3203 }
3204
3205 /*
3206 * CMD_SET_AID.
3207 */
3208 #define MWL8K_FRAME_PROT_DISABLED 0x00
3209 #define MWL8K_FRAME_PROT_11G 0x07
3210 #define MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY 0x02
3211 #define MWL8K_FRAME_PROT_11N_HT_ALL 0x06
3212
3213 struct mwl8k_cmd_update_set_aid {
3214 struct mwl8k_cmd_pkt header;
3215 __le16 aid;
3216
3217 /* AP's MAC address (BSSID) */
3218 __u8 bssid[ETH_ALEN];
3219 __le16 protection_mode;
3220 __u8 supp_rates[14];
3221 } __packed;
3222
3223 static void legacy_rate_mask_to_array(u8 *rates, u32 mask)
3224 {
3225 int i;
3226 int j;
3227
3228 /*
3229 * Clear nonstandard rate 4.
3230 */
3231 mask &= 0x1fef;
3232
3233 for (i = 0, j = 0; i < 13; i++) {
3234 if (mask & (1 << i))
3235 rates[j++] = mwl8k_rates_24[i].hw_value;
3236 }
3237 }
3238
3239 static int
3240 mwl8k_cmd_set_aid(struct ieee80211_hw *hw,
3241 struct ieee80211_vif *vif, u32 legacy_rate_mask)
3242 {
3243 struct mwl8k_cmd_update_set_aid *cmd;
3244 u16 prot_mode;
3245 int rc;
3246
3247 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3248 if (cmd == NULL)
3249 return -ENOMEM;
3250
3251 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_AID);
3252 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3253 cmd->aid = cpu_to_le16(vif->bss_conf.aid);
3254 memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
3255
3256 if (vif->bss_conf.use_cts_prot) {
3257 prot_mode = MWL8K_FRAME_PROT_11G;
3258 } else {
3259 switch (vif->bss_conf.ht_operation_mode &
3260 IEEE80211_HT_OP_MODE_PROTECTION) {
3261 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
3262 prot_mode = MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY;
3263 break;
3264 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
3265 prot_mode = MWL8K_FRAME_PROT_11N_HT_ALL;
3266 break;
3267 default:
3268 prot_mode = MWL8K_FRAME_PROT_DISABLED;
3269 break;
3270 }
3271 }
3272 cmd->protection_mode = cpu_to_le16(prot_mode);
3273
3274 legacy_rate_mask_to_array(cmd->supp_rates, legacy_rate_mask);
3275
3276 rc = mwl8k_post_cmd(hw, &cmd->header);
3277 kfree(cmd);
3278
3279 return rc;
3280 }
3281
3282 /*
3283 * CMD_SET_RATE.
3284 */
3285 struct mwl8k_cmd_set_rate {
3286 struct mwl8k_cmd_pkt header;
3287 __u8 legacy_rates[14];
3288
3289 /* Bitmap for supported MCS codes. */
3290 __u8 mcs_set[16];
3291 __u8 reserved[16];
3292 } __packed;
3293
3294 static int
3295 mwl8k_cmd_set_rate(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
3296 u32 legacy_rate_mask, u8 *mcs_rates)
3297 {
3298 struct mwl8k_cmd_set_rate *cmd;
3299 int rc;
3300
3301 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3302 if (cmd == NULL)
3303 return -ENOMEM;
3304
3305 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATE);
3306 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3307 legacy_rate_mask_to_array(cmd->legacy_rates, legacy_rate_mask);
3308 memcpy(cmd->mcs_set, mcs_rates, 16);
3309
3310 rc = mwl8k_post_cmd(hw, &cmd->header);
3311 kfree(cmd);
3312
3313 return rc;
3314 }
3315
3316 /*
3317 * CMD_FINALIZE_JOIN.
3318 */
3319 #define MWL8K_FJ_BEACON_MAXLEN 128
3320
3321 struct mwl8k_cmd_finalize_join {
3322 struct mwl8k_cmd_pkt header;
3323 __le32 sleep_interval; /* Number of beacon periods to sleep */
3324 __u8 beacon_data[MWL8K_FJ_BEACON_MAXLEN];
3325 } __packed;
3326
3327 static int mwl8k_cmd_finalize_join(struct ieee80211_hw *hw, void *frame,
3328 int framelen, int dtim)
3329 {
3330 struct mwl8k_cmd_finalize_join *cmd;
3331 struct ieee80211_mgmt *payload = frame;
3332 int payload_len;
3333 int rc;
3334
3335 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3336 if (cmd == NULL)
3337 return -ENOMEM;
3338
3339 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_FINALIZE_JOIN);
3340 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3341 cmd->sleep_interval = cpu_to_le32(dtim ? dtim : 1);
3342
3343 payload_len = framelen - ieee80211_hdrlen(payload->frame_control);
3344 if (payload_len < 0)
3345 payload_len = 0;
3346 else if (payload_len > MWL8K_FJ_BEACON_MAXLEN)
3347 payload_len = MWL8K_FJ_BEACON_MAXLEN;
3348
3349 memcpy(cmd->beacon_data, &payload->u.beacon, payload_len);
3350
3351 rc = mwl8k_post_cmd(hw, &cmd->header);
3352 kfree(cmd);
3353
3354 return rc;
3355 }
3356
3357 /*
3358 * CMD_SET_RTS_THRESHOLD.
3359 */
3360 struct mwl8k_cmd_set_rts_threshold {
3361 struct mwl8k_cmd_pkt header;
3362 __le16 action;
3363 __le16 threshold;
3364 } __packed;
3365
3366 static int
3367 mwl8k_cmd_set_rts_threshold(struct ieee80211_hw *hw, int rts_thresh)
3368 {
3369 struct mwl8k_cmd_set_rts_threshold *cmd;
3370 int rc;
3371
3372 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3373 if (cmd == NULL)
3374 return -ENOMEM;
3375
3376 cmd->header.code = cpu_to_le16(MWL8K_CMD_RTS_THRESHOLD);
3377 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3378 cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3379 cmd->threshold = cpu_to_le16(rts_thresh);
3380
3381 rc = mwl8k_post_cmd(hw, &cmd->header);
3382 kfree(cmd);
3383
3384 return rc;
3385 }
3386
3387 /*
3388 * CMD_SET_SLOT.
3389 */
3390 struct mwl8k_cmd_set_slot {
3391 struct mwl8k_cmd_pkt header;
3392 __le16 action;
3393 __u8 short_slot;
3394 } __packed;
3395
3396 static int mwl8k_cmd_set_slot(struct ieee80211_hw *hw, bool short_slot_time)
3397 {
3398 struct mwl8k_cmd_set_slot *cmd;
3399 int rc;
3400
3401 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3402 if (cmd == NULL)
3403 return -ENOMEM;
3404
3405 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_SLOT);
3406 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3407 cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3408 cmd->short_slot = short_slot_time;
3409
3410 rc = mwl8k_post_cmd(hw, &cmd->header);
3411 kfree(cmd);
3412
3413 return rc;
3414 }
3415
3416 /*
3417 * CMD_SET_EDCA_PARAMS.
3418 */
3419 struct mwl8k_cmd_set_edca_params {
3420 struct mwl8k_cmd_pkt header;
3421
3422 /* See MWL8K_SET_EDCA_XXX below */
3423 __le16 action;
3424
3425 /* TX opportunity in units of 32 us */
3426 __le16 txop;
3427
3428 union {
3429 struct {
3430 /* Log exponent of max contention period: 0...15 */
3431 __le32 log_cw_max;
3432
3433 /* Log exponent of min contention period: 0...15 */
3434 __le32 log_cw_min;
3435
3436 /* Adaptive interframe spacing in units of 32us */
3437 __u8 aifs;
3438
3439 /* TX queue to configure */
3440 __u8 txq;
3441 } ap;
3442 struct {
3443 /* Log exponent of max contention period: 0...15 */
3444 __u8 log_cw_max;
3445
3446 /* Log exponent of min contention period: 0...15 */
3447 __u8 log_cw_min;
3448
3449 /* Adaptive interframe spacing in units of 32us */
3450 __u8 aifs;
3451
3452 /* TX queue to configure */
3453 __u8 txq;
3454 } sta;
3455 };
3456 } __packed;
3457
3458 #define MWL8K_SET_EDCA_CW 0x01
3459 #define MWL8K_SET_EDCA_TXOP 0x02
3460 #define MWL8K_SET_EDCA_AIFS 0x04
3461
3462 #define MWL8K_SET_EDCA_ALL (MWL8K_SET_EDCA_CW | \
3463 MWL8K_SET_EDCA_TXOP | \
3464 MWL8K_SET_EDCA_AIFS)
3465
3466 static int
3467 mwl8k_cmd_set_edca_params(struct ieee80211_hw *hw, __u8 qnum,
3468 __u16 cw_min, __u16 cw_max,
3469 __u8 aifs, __u16 txop)
3470 {
3471 struct mwl8k_priv *priv = hw->priv;
3472 struct mwl8k_cmd_set_edca_params *cmd;
3473 int rc;
3474
3475 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3476 if (cmd == NULL)
3477 return -ENOMEM;
3478
3479 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_EDCA_PARAMS);
3480 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3481 cmd->action = cpu_to_le16(MWL8K_SET_EDCA_ALL);
3482 cmd->txop = cpu_to_le16(txop);
3483 if (priv->ap_fw) {
3484 cmd->ap.log_cw_max = cpu_to_le32(ilog2(cw_max + 1));
3485 cmd->ap.log_cw_min = cpu_to_le32(ilog2(cw_min + 1));
3486 cmd->ap.aifs = aifs;
3487 cmd->ap.txq = qnum;
3488 } else {
3489 cmd->sta.log_cw_max = (u8)ilog2(cw_max + 1);
3490 cmd->sta.log_cw_min = (u8)ilog2(cw_min + 1);
3491 cmd->sta.aifs = aifs;
3492 cmd->sta.txq = qnum;
3493 }
3494
3495 rc = mwl8k_post_cmd(hw, &cmd->header);
3496 kfree(cmd);
3497
3498 return rc;
3499 }
3500
3501 /*
3502 * CMD_SET_WMM_MODE.
3503 */
3504 struct mwl8k_cmd_set_wmm_mode {
3505 struct mwl8k_cmd_pkt header;
3506 __le16 action;
3507 } __packed;
3508
3509 static int mwl8k_cmd_set_wmm_mode(struct ieee80211_hw *hw, bool enable)
3510 {
3511 struct mwl8k_priv *priv = hw->priv;
3512 struct mwl8k_cmd_set_wmm_mode *cmd;
3513 int rc;
3514
3515 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3516 if (cmd == NULL)
3517 return -ENOMEM;
3518
3519 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_WMM_MODE);
3520 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3521 cmd->action = cpu_to_le16(!!enable);
3522
3523 rc = mwl8k_post_cmd(hw, &cmd->header);
3524 kfree(cmd);
3525
3526 if (!rc)
3527 priv->wmm_enabled = enable;
3528
3529 return rc;
3530 }
3531
3532 /*
3533 * CMD_MIMO_CONFIG.
3534 */
3535 struct mwl8k_cmd_mimo_config {
3536 struct mwl8k_cmd_pkt header;
3537 __le32 action;
3538 __u8 rx_antenna_map;
3539 __u8 tx_antenna_map;
3540 } __packed;
3541
3542 static int mwl8k_cmd_mimo_config(struct ieee80211_hw *hw, __u8 rx, __u8 tx)
3543 {
3544 struct mwl8k_cmd_mimo_config *cmd;
3545 int rc;
3546
3547 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3548 if (cmd == NULL)
3549 return -ENOMEM;
3550
3551 cmd->header.code = cpu_to_le16(MWL8K_CMD_MIMO_CONFIG);
3552 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3553 cmd->action = cpu_to_le32((u32)MWL8K_CMD_SET);
3554 cmd->rx_antenna_map = rx;
3555 cmd->tx_antenna_map = tx;
3556
3557 rc = mwl8k_post_cmd(hw, &cmd->header);
3558 kfree(cmd);
3559
3560 return rc;
3561 }
3562
3563 /*
3564 * CMD_USE_FIXED_RATE (STA version).
3565 */
3566 struct mwl8k_cmd_use_fixed_rate_sta {
3567 struct mwl8k_cmd_pkt header;
3568 __le32 action;
3569 __le32 allow_rate_drop;
3570 __le32 num_rates;
3571 struct {
3572 __le32 is_ht_rate;
3573 __le32 enable_retry;
3574 __le32 rate;
3575 __le32 retry_count;
3576 } rate_entry[8];
3577 __le32 rate_type;
3578 __le32 reserved1;
3579 __le32 reserved2;
3580 } __packed;
3581
3582 #define MWL8K_USE_AUTO_RATE 0x0002
3583 #define MWL8K_UCAST_RATE 0
3584
3585 static int mwl8k_cmd_use_fixed_rate_sta(struct ieee80211_hw *hw)
3586 {
3587 struct mwl8k_cmd_use_fixed_rate_sta *cmd;
3588 int rc;
3589
3590 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3591 if (cmd == NULL)
3592 return -ENOMEM;
3593
3594 cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
3595 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3596 cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE);
3597 cmd->rate_type = cpu_to_le32(MWL8K_UCAST_RATE);
3598
3599 rc = mwl8k_post_cmd(hw, &cmd->header);
3600 kfree(cmd);
3601
3602 return rc;
3603 }
3604
3605 /*
3606 * CMD_USE_FIXED_RATE (AP version).
3607 */
3608 struct mwl8k_cmd_use_fixed_rate_ap {
3609 struct mwl8k_cmd_pkt header;
3610 __le32 action;
3611 __le32 allow_rate_drop;
3612 __le32 num_rates;
3613 struct mwl8k_rate_entry_ap {
3614 __le32 is_ht_rate;
3615 __le32 enable_retry;
3616 __le32 rate;
3617 __le32 retry_count;
3618 } rate_entry[4];
3619 u8 multicast_rate;
3620 u8 multicast_rate_type;
3621 u8 management_rate;
3622 } __packed;
3623
3624 static int
3625 mwl8k_cmd_use_fixed_rate_ap(struct ieee80211_hw *hw, int mcast, int mgmt)
3626 {
3627 struct mwl8k_cmd_use_fixed_rate_ap *cmd;
3628 int rc;
3629
3630 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3631 if (cmd == NULL)
3632 return -ENOMEM;
3633
3634 cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
3635 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3636 cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE);
3637 cmd->multicast_rate = mcast;
3638 cmd->management_rate = mgmt;
3639
3640 rc = mwl8k_post_cmd(hw, &cmd->header);
3641 kfree(cmd);
3642
3643 return rc;
3644 }
3645
3646 /*
3647 * CMD_ENABLE_SNIFFER.
3648 */
3649 struct mwl8k_cmd_enable_sniffer {
3650 struct mwl8k_cmd_pkt header;
3651 __le32 action;
3652 } __packed;
3653
3654 static int mwl8k_cmd_enable_sniffer(struct ieee80211_hw *hw, bool enable)
3655 {
3656 struct mwl8k_cmd_enable_sniffer *cmd;
3657 int rc;
3658
3659 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3660 if (cmd == NULL)
3661 return -ENOMEM;
3662
3663 cmd->header.code = cpu_to_le16(MWL8K_CMD_ENABLE_SNIFFER);
3664 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3665 cmd->action = cpu_to_le32(!!enable);
3666
3667 rc = mwl8k_post_cmd(hw, &cmd->header);
3668 kfree(cmd);
3669
3670 return rc;
3671 }
3672
3673 struct mwl8k_cmd_update_mac_addr {
3674 struct mwl8k_cmd_pkt header;
3675 union {
3676 struct {
3677 __le16 mac_type;
3678 __u8 mac_addr[ETH_ALEN];
3679 } mbss;
3680 __u8 mac_addr[ETH_ALEN];
3681 };
3682 } __packed;
3683
3684 #define MWL8K_MAC_TYPE_PRIMARY_CLIENT 0
3685 #define MWL8K_MAC_TYPE_SECONDARY_CLIENT 1
3686 #define MWL8K_MAC_TYPE_PRIMARY_AP 2
3687 #define MWL8K_MAC_TYPE_SECONDARY_AP 3
3688
3689 static int mwl8k_cmd_update_mac_addr(struct ieee80211_hw *hw,
3690 struct ieee80211_vif *vif, u8 *mac, bool set)
3691 {
3692 struct mwl8k_priv *priv = hw->priv;
3693 struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
3694 struct mwl8k_cmd_update_mac_addr *cmd;
3695 int mac_type;
3696 int rc;
3697
3698 mac_type = MWL8K_MAC_TYPE_PRIMARY_AP;
3699 if (vif != NULL && vif->type == NL80211_IFTYPE_STATION) {
3700 if (mwl8k_vif->macid + 1 == ffs(priv->sta_macids_supported))
3701 if (priv->ap_fw)
3702 mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT;
3703 else
3704 mac_type = MWL8K_MAC_TYPE_PRIMARY_CLIENT;
3705 else
3706 mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT;
3707 } else if (vif != NULL && vif->type == NL80211_IFTYPE_AP) {
3708 if (mwl8k_vif->macid + 1 == ffs(priv->ap_macids_supported))
3709 mac_type = MWL8K_MAC_TYPE_PRIMARY_AP;
3710 else
3711 mac_type = MWL8K_MAC_TYPE_SECONDARY_AP;
3712 }
3713
3714 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3715 if (cmd == NULL)
3716 return -ENOMEM;
3717
3718 if (set)
3719 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_MAC_ADDR);
3720 else
3721 cmd->header.code = cpu_to_le16(MWL8K_CMD_DEL_MAC_ADDR);
3722
3723 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3724 if (priv->ap_fw) {
3725 cmd->mbss.mac_type = cpu_to_le16(mac_type);
3726 memcpy(cmd->mbss.mac_addr, mac, ETH_ALEN);
3727 } else {
3728 memcpy(cmd->mac_addr, mac, ETH_ALEN);
3729 }
3730
3731 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3732 kfree(cmd);
3733
3734 return rc;
3735 }
3736
3737 /*
3738 * MWL8K_CMD_SET_MAC_ADDR.
3739 */
3740 static inline int mwl8k_cmd_set_mac_addr(struct ieee80211_hw *hw,
3741 struct ieee80211_vif *vif, u8 *mac)
3742 {
3743 return mwl8k_cmd_update_mac_addr(hw, vif, mac, true);
3744 }
3745
3746 /*
3747 * MWL8K_CMD_DEL_MAC_ADDR.
3748 */
3749 static inline int mwl8k_cmd_del_mac_addr(struct ieee80211_hw *hw,
3750 struct ieee80211_vif *vif, u8 *mac)
3751 {
3752 return mwl8k_cmd_update_mac_addr(hw, vif, mac, false);
3753 }
3754
3755 /*
3756 * CMD_SET_RATEADAPT_MODE.
3757 */
3758 struct mwl8k_cmd_set_rate_adapt_mode {
3759 struct mwl8k_cmd_pkt header;
3760 __le16 action;
3761 __le16 mode;
3762 } __packed;
3763
3764 static int mwl8k_cmd_set_rateadapt_mode(struct ieee80211_hw *hw, __u16 mode)
3765 {
3766 struct mwl8k_cmd_set_rate_adapt_mode *cmd;
3767 int rc;
3768
3769 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3770 if (cmd == NULL)
3771 return -ENOMEM;
3772
3773 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATEADAPT_MODE);
3774 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3775 cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3776 cmd->mode = cpu_to_le16(mode);
3777
3778 rc = mwl8k_post_cmd(hw, &cmd->header);
3779 kfree(cmd);
3780
3781 return rc;
3782 }
3783
3784 /*
3785 * CMD_GET_WATCHDOG_BITMAP.
3786 */
3787 struct mwl8k_cmd_get_watchdog_bitmap {
3788 struct mwl8k_cmd_pkt header;
3789 u8 bitmap;
3790 } __packed;
3791
3792 static int mwl8k_cmd_get_watchdog_bitmap(struct ieee80211_hw *hw, u8 *bitmap)
3793 {
3794 struct mwl8k_cmd_get_watchdog_bitmap *cmd;
3795 int rc;
3796
3797 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3798 if (cmd == NULL)
3799 return -ENOMEM;
3800
3801 cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_WATCHDOG_BITMAP);
3802 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3803
3804 rc = mwl8k_post_cmd(hw, &cmd->header);
3805 if (!rc)
3806 *bitmap = cmd->bitmap;
3807
3808 kfree(cmd);
3809
3810 return rc;
3811 }
3812
3813 #define MWL8K_WMM_QUEUE_NUMBER 3
3814
3815 static void mwl8k_destroy_ba(struct ieee80211_hw *hw,
3816 u8 idx);
3817
3818 static void mwl8k_watchdog_ba_events(struct work_struct *work)
3819 {
3820 int rc;
3821 u8 bitmap = 0, stream_index;
3822 struct mwl8k_ampdu_stream *streams;
3823 struct mwl8k_priv *priv =
3824 container_of(work, struct mwl8k_priv, watchdog_ba_handle);
3825 struct ieee80211_hw *hw = priv->hw;
3826 int i;
3827 u32 status = 0;
3828
3829 mwl8k_fw_lock(hw);
3830
3831 rc = mwl8k_cmd_get_watchdog_bitmap(priv->hw, &bitmap);
3832 if (rc)
3833 goto done;
3834
3835 spin_lock(&priv->stream_lock);
3836
3837 /* the bitmap is the hw queue number. Map it to the ampdu queue. */
3838 for (i = 0; i < TOTAL_HW_TX_QUEUES; i++) {
3839 if (bitmap & (1 << i)) {
3840 stream_index = (i + MWL8K_WMM_QUEUE_NUMBER) %
3841 TOTAL_HW_TX_QUEUES;
3842 streams = &priv->ampdu[stream_index];
3843 if (streams->state == AMPDU_STREAM_ACTIVE) {
3844 ieee80211_stop_tx_ba_session(streams->sta,
3845 streams->tid);
3846 spin_unlock(&priv->stream_lock);
3847 mwl8k_destroy_ba(hw, stream_index);
3848 spin_lock(&priv->stream_lock);
3849 }
3850 }
3851 }
3852
3853 spin_unlock(&priv->stream_lock);
3854 done:
3855 atomic_dec(&priv->watchdog_event_pending);
3856 status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
3857 iowrite32((status | MWL8K_A2H_INT_BA_WATCHDOG),
3858 priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
3859 mwl8k_fw_unlock(hw);
3860 return;
3861 }
3862
3863
3864 /*
3865 * CMD_BSS_START.
3866 */
3867 struct mwl8k_cmd_bss_start {
3868 struct mwl8k_cmd_pkt header;
3869 __le32 enable;
3870 } __packed;
3871
3872 static int mwl8k_cmd_bss_start(struct ieee80211_hw *hw,
3873 struct ieee80211_vif *vif, int enable)
3874 {
3875 struct mwl8k_cmd_bss_start *cmd;
3876 struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
3877 struct mwl8k_priv *priv = hw->priv;
3878 int rc;
3879
3880 if (enable && (priv->running_bsses & (1 << mwl8k_vif->macid)))
3881 return 0;
3882
3883 if (!enable && !(priv->running_bsses & (1 << mwl8k_vif->macid)))
3884 return 0;
3885
3886 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3887 if (cmd == NULL)
3888 return -ENOMEM;
3889
3890 cmd->header.code = cpu_to_le16(MWL8K_CMD_BSS_START);
3891 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3892 cmd->enable = cpu_to_le32(enable);
3893
3894 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3895 kfree(cmd);
3896
3897 if (!rc) {
3898 if (enable)
3899 priv->running_bsses |= (1 << mwl8k_vif->macid);
3900 else
3901 priv->running_bsses &= ~(1 << mwl8k_vif->macid);
3902 }
3903 return rc;
3904 }
3905
3906 static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable, u32 bitmap)
3907 {
3908 struct mwl8k_priv *priv = hw->priv;
3909 struct mwl8k_vif *mwl8k_vif, *tmp_vif;
3910 struct ieee80211_vif *vif;
3911
3912 list_for_each_entry_safe(mwl8k_vif, tmp_vif, &priv->vif_list, list) {
3913 vif = mwl8k_vif->vif;
3914
3915 if (!(bitmap & (1 << mwl8k_vif->macid)))
3916 continue;
3917
3918 if (vif->type == NL80211_IFTYPE_AP)
3919 mwl8k_cmd_bss_start(hw, vif, enable);
3920 }
3921 }
3922 /*
3923 * CMD_BASTREAM.
3924 */
3925
3926 /*
3927 * UPSTREAM is tx direction
3928 */
3929 #define BASTREAM_FLAG_DIRECTION_UPSTREAM 0x00
3930 #define BASTREAM_FLAG_IMMEDIATE_TYPE 0x01
3931
3932 enum ba_stream_action_type {
3933 MWL8K_BA_CREATE,
3934 MWL8K_BA_UPDATE,
3935 MWL8K_BA_DESTROY,
3936 MWL8K_BA_FLUSH,
3937 MWL8K_BA_CHECK,
3938 };
3939
3940
3941 struct mwl8k_create_ba_stream {
3942 __le32 flags;
3943 __le32 idle_thrs;
3944 __le32 bar_thrs;
3945 __le32 window_size;
3946 u8 peer_mac_addr[6];
3947 u8 dialog_token;
3948 u8 tid;
3949 u8 queue_id;
3950 u8 param_info;
3951 __le32 ba_context;
3952 u8 reset_seq_no_flag;
3953 __le16 curr_seq_no;
3954 u8 sta_src_mac_addr[6];
3955 } __packed;
3956
3957 struct mwl8k_destroy_ba_stream {
3958 __le32 flags;
3959 __le32 ba_context;
3960 } __packed;
3961
3962 struct mwl8k_cmd_bastream {
3963 struct mwl8k_cmd_pkt header;
3964 __le32 action;
3965 union {
3966 struct mwl8k_create_ba_stream create_params;
3967 struct mwl8k_destroy_ba_stream destroy_params;
3968 };
3969 } __packed;
3970
3971 static int
3972 mwl8k_check_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream,
3973 struct ieee80211_vif *vif)
3974 {
3975 struct mwl8k_cmd_bastream *cmd;
3976 int rc;
3977
3978 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3979 if (cmd == NULL)
3980 return -ENOMEM;
3981
3982 cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
3983 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3984
3985 cmd->action = cpu_to_le32(MWL8K_BA_CHECK);
3986
3987 cmd->create_params.queue_id = stream->idx;
3988 memcpy(&cmd->create_params.peer_mac_addr[0], stream->sta->addr,
3989 ETH_ALEN);
3990 cmd->create_params.tid = stream->tid;
3991
3992 cmd->create_params.flags =
3993 cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE) |
3994 cpu_to_le32(BASTREAM_FLAG_DIRECTION_UPSTREAM);
3995
3996 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3997
3998 kfree(cmd);
3999
4000 return rc;
4001 }
4002
4003 static int
4004 mwl8k_create_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream,
4005 u8 buf_size, struct ieee80211_vif *vif)
4006 {
4007 struct mwl8k_cmd_bastream *cmd;
4008 int rc;
4009
4010 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4011 if (cmd == NULL)
4012 return -ENOMEM;
4013
4014
4015 cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
4016 cmd->header.length = cpu_to_le16(sizeof(*cmd));
4017
4018 cmd->action = cpu_to_le32(MWL8K_BA_CREATE);
4019
4020 cmd->create_params.bar_thrs = cpu_to_le32((u32)buf_size);
4021 cmd->create_params.window_size = cpu_to_le32((u32)buf_size);
4022 cmd->create_params.queue_id = stream->idx;
4023
4024 memcpy(cmd->create_params.peer_mac_addr, stream->sta->addr, ETH_ALEN);
4025 cmd->create_params.tid = stream->tid;
4026 cmd->create_params.curr_seq_no = cpu_to_le16(0);
4027 cmd->create_params.reset_seq_no_flag = 1;
4028
4029 cmd->create_params.param_info =
4030 (stream->sta->ht_cap.ampdu_factor &
4031 IEEE80211_HT_AMPDU_PARM_FACTOR) |
4032 ((stream->sta->ht_cap.ampdu_density << 2) &
4033 IEEE80211_HT_AMPDU_PARM_DENSITY);
4034
4035 cmd->create_params.flags =
4036 cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE |
4037 BASTREAM_FLAG_DIRECTION_UPSTREAM);
4038
4039 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4040
4041 wiphy_debug(hw->wiphy, "Created a BA stream for %pM : tid %d\n",
4042 stream->sta->addr, stream->tid);
4043 kfree(cmd);
4044
4045 return rc;
4046 }
4047
4048 static void mwl8k_destroy_ba(struct ieee80211_hw *hw,
4049 u8 idx)
4050 {
4051 struct mwl8k_cmd_bastream *cmd;
4052
4053 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4054 if (cmd == NULL)
4055 return;
4056
4057 cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
4058 cmd->header.length = cpu_to_le16(sizeof(*cmd));
4059 cmd->action = cpu_to_le32(MWL8K_BA_DESTROY);
4060
4061 cmd->destroy_params.ba_context = cpu_to_le32(idx);
4062 mwl8k_post_cmd(hw, &cmd->header);
4063
4064 wiphy_debug(hw->wiphy, "Deleted BA stream index %d\n", idx);
4065
4066 kfree(cmd);
4067 }
4068
4069 /*
4070 * CMD_SET_NEW_STN.
4071 */
4072 struct mwl8k_cmd_set_new_stn {
4073 struct mwl8k_cmd_pkt header;
4074 __le16 aid;
4075 __u8 mac_addr[6];
4076 __le16 stn_id;
4077 __le16 action;
4078 __le16 rsvd;
4079 __le32 legacy_rates;
4080 __u8 ht_rates[4];
4081 __le16 cap_info;
4082 __le16 ht_capabilities_info;
4083 __u8 mac_ht_param_info;
4084 __u8 rev;
4085 __u8 control_channel;
4086 __u8 add_channel;
4087 __le16 op_mode;
4088 __le16 stbc;
4089 __u8 add_qos_info;
4090 __u8 is_qos_sta;
4091 __le32 fw_sta_ptr;
4092 } __packed;
4093
4094 #define MWL8K_STA_ACTION_ADD 0
4095 #define MWL8K_STA_ACTION_REMOVE 2
4096
4097 static int mwl8k_cmd_set_new_stn_add(struct ieee80211_hw *hw,
4098 struct ieee80211_vif *vif,
4099 struct ieee80211_sta *sta)
4100 {
4101 struct mwl8k_cmd_set_new_stn *cmd;
4102 u32 rates;
4103 int rc;
4104
4105 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4106 if (cmd == NULL)
4107 return -ENOMEM;
4108
4109 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4110 cmd->header.length = cpu_to_le16(sizeof(*cmd));
4111 cmd->aid = cpu_to_le16(sta->aid);
4112 memcpy(cmd->mac_addr, sta->addr, ETH_ALEN);
4113 cmd->stn_id = cpu_to_le16(sta->aid);
4114 cmd->action = cpu_to_le16(MWL8K_STA_ACTION_ADD);
4115 if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
4116 rates = sta->supp_rates[NL80211_BAND_2GHZ];
4117 else
4118 rates = sta->supp_rates[NL80211_BAND_5GHZ] << 5;
4119 cmd->legacy_rates = cpu_to_le32(rates);
4120 if (sta->ht_cap.ht_supported) {
4121 cmd->ht_rates[0] = sta->ht_cap.mcs.rx_mask[0];
4122 cmd->ht_rates[1] = sta->ht_cap.mcs.rx_mask[1];
4123 cmd->ht_rates[2] = sta->ht_cap.mcs.rx_mask[2];
4124 cmd->ht_rates[3] = sta->ht_cap.mcs.rx_mask[3];
4125 cmd->ht_capabilities_info = cpu_to_le16(sta->ht_cap.cap);
4126 cmd->mac_ht_param_info = (sta->ht_cap.ampdu_factor & 3) |
4127 ((sta->ht_cap.ampdu_density & 7) << 2);
4128 cmd->is_qos_sta = 1;
4129 }
4130
4131 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4132 kfree(cmd);
4133
4134 return rc;
4135 }
4136
4137 static int mwl8k_cmd_set_new_stn_add_self(struct ieee80211_hw *hw,
4138 struct ieee80211_vif *vif)
4139 {
4140 struct mwl8k_cmd_set_new_stn *cmd;
4141 int rc;
4142
4143 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4144 if (cmd == NULL)
4145 return -ENOMEM;
4146
4147 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4148 cmd->header.length = cpu_to_le16(sizeof(*cmd));
4149 memcpy(cmd->mac_addr, vif->addr, ETH_ALEN);
4150
4151 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4152 kfree(cmd);
4153
4154 return rc;
4155 }
4156
4157 static int mwl8k_cmd_set_new_stn_del(struct ieee80211_hw *hw,
4158 struct ieee80211_vif *vif, u8 *addr)
4159 {
4160 struct mwl8k_cmd_set_new_stn *cmd;
4161 struct mwl8k_priv *priv = hw->priv;
4162 int rc, i;
4163 u8 idx;
4164
4165 spin_lock(&priv->stream_lock);
4166 /* Destroy any active ampdu streams for this sta */
4167 for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
4168 struct mwl8k_ampdu_stream *s;
4169 s = &priv->ampdu[i];
4170 if (s->state != AMPDU_NO_STREAM) {
4171 if (memcmp(s->sta->addr, addr, ETH_ALEN) == 0) {
4172 if (s->state == AMPDU_STREAM_ACTIVE) {
4173 idx = s->idx;
4174 spin_unlock(&priv->stream_lock);
4175 mwl8k_destroy_ba(hw, idx);
4176 spin_lock(&priv->stream_lock);
4177 } else if (s->state == AMPDU_STREAM_NEW) {
4178 mwl8k_remove_stream(hw, s);
4179 }
4180 }
4181 }
4182 }
4183
4184 spin_unlock(&priv->stream_lock);
4185
4186 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4187 if (cmd == NULL)
4188 return -ENOMEM;
4189
4190 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4191 cmd->header.length = cpu_to_le16(sizeof(*cmd));
4192 memcpy(cmd->mac_addr, addr, ETH_ALEN);
4193 cmd->action = cpu_to_le16(MWL8K_STA_ACTION_REMOVE);
4194
4195 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4196 kfree(cmd);
4197
4198 return rc;
4199 }
4200
4201 /*
4202 * CMD_UPDATE_ENCRYPTION.
4203 */
4204
4205 #define MAX_ENCR_KEY_LENGTH 16
4206 #define MIC_KEY_LENGTH 8
4207
4208 struct mwl8k_cmd_update_encryption {
4209 struct mwl8k_cmd_pkt header;
4210
4211 __le32 action;
4212 __le32 reserved;
4213 __u8 mac_addr[6];
4214 __u8 encr_type;
4215
4216 } __packed;
4217
4218 struct mwl8k_cmd_set_key {
4219 struct mwl8k_cmd_pkt header;
4220
4221 __le32 action;
4222 __le32 reserved;
4223 __le16 length;
4224 __le16 key_type_id;
4225 __le32 key_info;
4226 __le32 key_id;
4227 __le16 key_len;
4228 __u8 key_material[MAX_ENCR_KEY_LENGTH];
4229 __u8 tkip_tx_mic_key[MIC_KEY_LENGTH];
4230 __u8 tkip_rx_mic_key[MIC_KEY_LENGTH];
4231 __le16 tkip_rsc_low;
4232 __le32 tkip_rsc_high;
4233 __le16 tkip_tsc_low;
4234 __le32 tkip_tsc_high;
4235 __u8 mac_addr[6];
4236 } __packed;
4237
4238 enum {
4239 MWL8K_ENCR_ENABLE,
4240 MWL8K_ENCR_SET_KEY,
4241 MWL8K_ENCR_REMOVE_KEY,
4242 MWL8K_ENCR_SET_GROUP_KEY,
4243 };
4244
4245 #define MWL8K_UPDATE_ENCRYPTION_TYPE_WEP 0
4246 #define MWL8K_UPDATE_ENCRYPTION_TYPE_DISABLE 1
4247 #define MWL8K_UPDATE_ENCRYPTION_TYPE_TKIP 4
4248 #define MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED 7
4249 #define MWL8K_UPDATE_ENCRYPTION_TYPE_AES 8
4250
4251 enum {
4252 MWL8K_ALG_WEP,
4253 MWL8K_ALG_TKIP,
4254 MWL8K_ALG_CCMP,
4255 };
4256
4257 #define MWL8K_KEY_FLAG_TXGROUPKEY 0x00000004
4258 #define MWL8K_KEY_FLAG_PAIRWISE 0x00000008
4259 #define MWL8K_KEY_FLAG_TSC_VALID 0x00000040
4260 #define MWL8K_KEY_FLAG_WEP_TXKEY 0x01000000
4261 #define MWL8K_KEY_FLAG_MICKEY_VALID 0x02000000
4262
4263 static int mwl8k_cmd_update_encryption_enable(struct ieee80211_hw *hw,
4264 struct ieee80211_vif *vif,
4265 u8 *addr,
4266 u8 encr_type)
4267 {
4268 struct mwl8k_cmd_update_encryption *cmd;
4269 int rc;
4270
4271 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4272 if (cmd == NULL)
4273 return -ENOMEM;
4274
4275 cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION);
4276 cmd->header.length = cpu_to_le16(sizeof(*cmd));
4277 cmd->action = cpu_to_le32(MWL8K_ENCR_ENABLE);
4278 memcpy(cmd->mac_addr, addr, ETH_ALEN);
4279 cmd->encr_type = encr_type;
4280
4281 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4282 kfree(cmd);
4283
4284 return rc;
4285 }
4286
4287 static int mwl8k_encryption_set_cmd_info(struct mwl8k_cmd_set_key *cmd,
4288 u8 *addr,
4289 struct ieee80211_key_conf *key)
4290 {
4291 cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION);
4292 cmd->header.length = cpu_to_le16(sizeof(*cmd));
4293 cmd->length = cpu_to_le16(sizeof(*cmd) -
4294 offsetof(struct mwl8k_cmd_set_key, length));
4295 cmd->key_id = cpu_to_le32(key->keyidx);
4296 cmd->key_len = cpu_to_le16(key->keylen);
4297 memcpy(cmd->mac_addr, addr, ETH_ALEN);
4298
4299 switch (key->cipher) {
4300 case WLAN_CIPHER_SUITE_WEP40:
4301 case WLAN_CIPHER_SUITE_WEP104:
4302 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_WEP);
4303 if (key->keyidx == 0)
4304 cmd->key_info = cpu_to_le32(MWL8K_KEY_FLAG_WEP_TXKEY);
4305
4306 break;
4307 case WLAN_CIPHER_SUITE_TKIP:
4308 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_TKIP);
4309 cmd->key_info = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4310 ? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE)
4311 : cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY);
4312 cmd->key_info |= cpu_to_le32(MWL8K_KEY_FLAG_MICKEY_VALID
4313 | MWL8K_KEY_FLAG_TSC_VALID);
4314 break;
4315 case WLAN_CIPHER_SUITE_CCMP:
4316 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_CCMP);
4317 cmd->key_info = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4318 ? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE)
4319 : cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY);
4320 break;
4321 default:
4322 return -ENOTSUPP;
4323 }
4324
4325 return 0;
4326 }
4327
4328 static int mwl8k_cmd_encryption_set_key(struct ieee80211_hw *hw,
4329 struct ieee80211_vif *vif,
4330 u8 *addr,
4331 struct ieee80211_key_conf *key)
4332 {
4333 struct mwl8k_cmd_set_key *cmd;
4334 int rc;
4335 int keymlen;
4336 u32 action;
4337 u8 idx;
4338 struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4339
4340 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4341 if (cmd == NULL)
4342 return -ENOMEM;
4343
4344 rc = mwl8k_encryption_set_cmd_info(cmd, addr, key);
4345 if (rc < 0)
4346 goto done;
4347
4348 idx = key->keyidx;
4349
4350 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4351 action = MWL8K_ENCR_SET_KEY;
4352 else
4353 action = MWL8K_ENCR_SET_GROUP_KEY;
4354
4355 switch (key->cipher) {
4356 case WLAN_CIPHER_SUITE_WEP40:
4357 case WLAN_CIPHER_SUITE_WEP104:
4358 if (!mwl8k_vif->wep_key_conf[idx].enabled) {
4359 memcpy(mwl8k_vif->wep_key_conf[idx].key, key,
4360 sizeof(*key) + key->keylen);
4361 mwl8k_vif->wep_key_conf[idx].enabled = 1;
4362 }
4363
4364 keymlen = key->keylen;
4365 action = MWL8K_ENCR_SET_KEY;
4366 break;
4367 case WLAN_CIPHER_SUITE_TKIP:
4368 keymlen = MAX_ENCR_KEY_LENGTH + 2 * MIC_KEY_LENGTH;
4369 break;
4370 case WLAN_CIPHER_SUITE_CCMP:
4371 keymlen = key->keylen;
4372 break;
4373 default:
4374 rc = -ENOTSUPP;
4375 goto done;
4376 }
4377
4378 memcpy(cmd->key_material, key->key, keymlen);
4379 cmd->action = cpu_to_le32(action);
4380
4381 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4382 done:
4383 kfree(cmd);
4384
4385 return rc;
4386 }
4387
4388 static int mwl8k_cmd_encryption_remove_key(struct ieee80211_hw *hw,
4389 struct ieee80211_vif *vif,
4390 u8 *addr,
4391 struct ieee80211_key_conf *key)
4392 {
4393 struct mwl8k_cmd_set_key *cmd;
4394 int rc;
4395 struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4396
4397 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4398 if (cmd == NULL)
4399 return -ENOMEM;
4400
4401 rc = mwl8k_encryption_set_cmd_info(cmd, addr, key);
4402 if (rc < 0)
4403 goto done;
4404
4405 if (key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
4406 key->cipher == WLAN_CIPHER_SUITE_WEP104)
4407 mwl8k_vif->wep_key_conf[key->keyidx].enabled = 0;
4408
4409 cmd->action = cpu_to_le32(MWL8K_ENCR_REMOVE_KEY);
4410
4411 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4412 done:
4413 kfree(cmd);
4414
4415 return rc;
4416 }
4417
4418 static int mwl8k_set_key(struct ieee80211_hw *hw,
4419 enum set_key_cmd cmd_param,
4420 struct ieee80211_vif *vif,
4421 struct ieee80211_sta *sta,
4422 struct ieee80211_key_conf *key)
4423 {
4424 int rc = 0;
4425 u8 encr_type;
4426 u8 *addr;
4427 struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4428 struct mwl8k_priv *priv = hw->priv;
4429
4430 if (vif->type == NL80211_IFTYPE_STATION && !priv->ap_fw)
4431 return -EOPNOTSUPP;
4432
4433 if (sta == NULL)
4434 addr = vif->addr;
4435 else
4436 addr = sta->addr;
4437
4438 if (cmd_param == SET_KEY) {
4439 rc = mwl8k_cmd_encryption_set_key(hw, vif, addr, key);
4440 if (rc)
4441 goto out;
4442
4443 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40)
4444 || (key->cipher == WLAN_CIPHER_SUITE_WEP104))
4445 encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_WEP;
4446 else
4447 encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED;
4448
4449 rc = mwl8k_cmd_update_encryption_enable(hw, vif, addr,
4450 encr_type);
4451 if (rc)
4452 goto out;
4453
4454 mwl8k_vif->is_hw_crypto_enabled = true;
4455
4456 } else {
4457 rc = mwl8k_cmd_encryption_remove_key(hw, vif, addr, key);
4458
4459 if (rc)
4460 goto out;
4461 }
4462 out:
4463 return rc;
4464 }
4465
4466 /*
4467 * CMD_UPDATE_STADB.
4468 */
4469 struct ewc_ht_info {
4470 __le16 control1;
4471 __le16 control2;
4472 __le16 control3;
4473 } __packed;
4474
4475 struct peer_capability_info {
4476 /* Peer type - AP vs. STA. */
4477 __u8 peer_type;
4478
4479 /* Basic 802.11 capabilities from assoc resp. */
4480 __le16 basic_caps;
4481
4482 /* Set if peer supports 802.11n high throughput (HT). */
4483 __u8 ht_support;
4484
4485 /* Valid if HT is supported. */
4486 __le16 ht_caps;
4487 __u8 extended_ht_caps;
4488 struct ewc_ht_info ewc_info;
4489
4490 /* Legacy rate table. Intersection of our rates and peer rates. */
4491 __u8 legacy_rates[12];
4492
4493 /* HT rate table. Intersection of our rates and peer rates. */
4494 __u8 ht_rates[16];
4495 __u8 pad[16];
4496
4497 /* If set, interoperability mode, no proprietary extensions. */
4498 __u8 interop;
4499 __u8 pad2;
4500 __u8 station_id;
4501 __le16 amsdu_enabled;
4502 } __packed;
4503
4504 struct mwl8k_cmd_update_stadb {
4505 struct mwl8k_cmd_pkt header;
4506
4507 /* See STADB_ACTION_TYPE */
4508 __le32 action;
4509
4510 /* Peer MAC address */
4511 __u8 peer_addr[ETH_ALEN];
4512
4513 __le32 reserved;
4514
4515 /* Peer info - valid during add/update. */
4516 struct peer_capability_info peer_info;
4517 } __packed;
4518
4519 #define MWL8K_STA_DB_MODIFY_ENTRY 1
4520 #define MWL8K_STA_DB_DEL_ENTRY 2
4521
4522 /* Peer Entry flags - used to define the type of the peer node */
4523 #define MWL8K_PEER_TYPE_ACCESSPOINT 2
4524
4525 static int mwl8k_cmd_update_stadb_add(struct ieee80211_hw *hw,
4526 struct ieee80211_vif *vif,
4527 struct ieee80211_sta *sta)
4528 {
4529 struct mwl8k_cmd_update_stadb *cmd;
4530 struct peer_capability_info *p;
4531 u32 rates;
4532 int rc;
4533
4534 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4535 if (cmd == NULL)
4536 return -ENOMEM;
4537
4538 cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
4539 cmd->header.length = cpu_to_le16(sizeof(*cmd));
4540 cmd->action = cpu_to_le32(MWL8K_STA_DB_MODIFY_ENTRY);
4541 memcpy(cmd->peer_addr, sta->addr, ETH_ALEN);
4542
4543 p = &cmd->peer_info;
4544 p->peer_type = MWL8K_PEER_TYPE_ACCESSPOINT;
4545 p->basic_caps = cpu_to_le16(vif->bss_conf.assoc_capability);
4546 p->ht_support = sta->ht_cap.ht_supported;
4547 p->ht_caps = cpu_to_le16(sta->ht_cap.cap);
4548 p->extended_ht_caps = (sta->ht_cap.ampdu_factor & 3) |
4549 ((sta->ht_cap.ampdu_density & 7) << 2);
4550 if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
4551 rates = sta->supp_rates[NL80211_BAND_2GHZ];
4552 else
4553 rates = sta->supp_rates[NL80211_BAND_5GHZ] << 5;
4554 legacy_rate_mask_to_array(p->legacy_rates, rates);
4555 memcpy(p->ht_rates, sta->ht_cap.mcs.rx_mask, 16);
4556 p->interop = 1;
4557 p->amsdu_enabled = 0;
4558
4559 rc = mwl8k_post_cmd(hw, &cmd->header);
4560 if (!rc)
4561 rc = p->station_id;
4562 kfree(cmd);
4563
4564 return rc;
4565 }
4566
4567 static int mwl8k_cmd_update_stadb_del(struct ieee80211_hw *hw,
4568 struct ieee80211_vif *vif, u8 *addr)
4569 {
4570 struct mwl8k_cmd_update_stadb *cmd;
4571 int rc;
4572
4573 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4574 if (cmd == NULL)
4575 return -ENOMEM;
4576
4577 cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
4578 cmd->header.length = cpu_to_le16(sizeof(*cmd));
4579 cmd->action = cpu_to_le32(MWL8K_STA_DB_DEL_ENTRY);
4580 memcpy(cmd->peer_addr, addr, ETH_ALEN);
4581
4582 rc = mwl8k_post_cmd(hw, &cmd->header);
4583 kfree(cmd);
4584
4585 return rc;
4586 }
4587
4588
4589 /*
4590 * Interrupt handling.
4591 */
4592 static irqreturn_t mwl8k_interrupt(int irq, void *dev_id)
4593 {
4594 struct ieee80211_hw *hw = dev_id;
4595 struct mwl8k_priv *priv = hw->priv;
4596 u32 status;
4597
4598 status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4599 if (!status)
4600 return IRQ_NONE;
4601
4602 if (status & MWL8K_A2H_INT_TX_DONE) {
4603 status &= ~MWL8K_A2H_INT_TX_DONE;
4604 tasklet_schedule(&priv->poll_tx_task);
4605 }
4606
4607 if (status & MWL8K_A2H_INT_RX_READY) {
4608 status &= ~MWL8K_A2H_INT_RX_READY;
4609 tasklet_schedule(&priv->poll_rx_task);
4610 }
4611
4612 if (status & MWL8K_A2H_INT_BA_WATCHDOG) {
4613 iowrite32(~MWL8K_A2H_INT_BA_WATCHDOG,
4614 priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
4615
4616 atomic_inc(&priv->watchdog_event_pending);
4617 status &= ~MWL8K_A2H_INT_BA_WATCHDOG;
4618 ieee80211_queue_work(hw, &priv->watchdog_ba_handle);
4619 }
4620
4621 if (status)
4622 iowrite32(~status, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4623
4624 if (status & MWL8K_A2H_INT_OPC_DONE) {
4625 if (priv->hostcmd_wait != NULL)
4626 complete(priv->hostcmd_wait);
4627 }
4628
4629 if (status & MWL8K_A2H_INT_QUEUE_EMPTY) {
4630 if (!mutex_is_locked(&priv->fw_mutex) &&
4631 priv->radio_on && priv->pending_tx_pkts)
4632 mwl8k_tx_start(priv);
4633 }
4634
4635 return IRQ_HANDLED;
4636 }
4637
4638 static void mwl8k_tx_poll(struct tasklet_struct *t)
4639 {
4640 struct mwl8k_priv *priv = from_tasklet(priv, t, poll_tx_task);
4641 struct ieee80211_hw *hw = pci_get_drvdata(priv->pdev);
4642 int limit;
4643 int i;
4644
4645 limit = 32;
4646
4647 spin_lock(&priv->tx_lock);
4648
4649 for (i = 0; i < mwl8k_tx_queues(priv); i++)
4650 limit -= mwl8k_txq_reclaim(hw, i, limit, 0);
4651
4652 if (!priv->pending_tx_pkts && priv->tx_wait != NULL) {
4653 complete(priv->tx_wait);
4654 priv->tx_wait = NULL;
4655 }
4656
4657 spin_unlock(&priv->tx_lock);
4658
4659 if (limit) {
4660 writel(~MWL8K_A2H_INT_TX_DONE,
4661 priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4662 } else {
4663 tasklet_schedule(&priv->poll_tx_task);
4664 }
4665 }
4666
4667 static void mwl8k_rx_poll(struct tasklet_struct *t)
4668 {
4669 struct mwl8k_priv *priv = from_tasklet(priv, t, poll_rx_task);
4670 struct ieee80211_hw *hw = pci_get_drvdata(priv->pdev);
4671 int limit;
4672
4673 limit = 32;
4674 limit -= rxq_process(hw, 0, limit);
4675 limit -= rxq_refill(hw, 0, limit);
4676
4677 if (limit) {
4678 writel(~MWL8K_A2H_INT_RX_READY,
4679 priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4680 } else {
4681 tasklet_schedule(&priv->poll_rx_task);
4682 }
4683 }
4684
4685
4686 /*
4687 * Core driver operations.
4688 */
4689 static void mwl8k_tx(struct ieee80211_hw *hw,
4690 struct ieee80211_tx_control *control,
4691 struct sk_buff *skb)
4692 {
4693 struct mwl8k_priv *priv = hw->priv;
4694 int index = skb_get_queue_mapping(skb);
4695
4696 if (!priv->radio_on) {
4697 wiphy_debug(hw->wiphy,
4698 "dropped TX frame since radio disabled\n");
4699 dev_kfree_skb(skb);
4700 return;
4701 }
4702
4703 mwl8k_txq_xmit(hw, index, control->sta, skb);
4704 }
4705
4706 static int mwl8k_start(struct ieee80211_hw *hw)
4707 {
4708 struct mwl8k_priv *priv = hw->priv;
4709 int rc;
4710
4711 rc = request_irq(priv->pdev->irq, mwl8k_interrupt,
4712 IRQF_SHARED, MWL8K_NAME, hw);
4713 if (rc) {
4714 priv->irq = -1;
4715 wiphy_err(hw->wiphy, "failed to register IRQ handler\n");
4716 return -EIO;
4717 }
4718 priv->irq = priv->pdev->irq;
4719
4720 /* Enable TX reclaim and RX tasklets. */
4721 tasklet_enable(&priv->poll_tx_task);
4722 tasklet_enable(&priv->poll_rx_task);
4723
4724 /* Enable interrupts */
4725 iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4726 iowrite32(MWL8K_A2H_EVENTS,
4727 priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
4728
4729 rc = mwl8k_fw_lock(hw);
4730 if (!rc) {
4731 rc = mwl8k_cmd_radio_enable(hw);
4732
4733 if (!priv->ap_fw) {
4734 if (!rc)
4735 rc = mwl8k_cmd_enable_sniffer(hw, 0);
4736
4737 if (!rc)
4738 rc = mwl8k_cmd_set_pre_scan(hw);
4739
4740 if (!rc)
4741 rc = mwl8k_cmd_set_post_scan(hw,
4742 "\x00\x00\x00\x00\x00\x00");
4743 }
4744
4745 if (!rc)
4746 rc = mwl8k_cmd_set_rateadapt_mode(hw, 0);
4747
4748 if (!rc)
4749 rc = mwl8k_cmd_set_wmm_mode(hw, 0);
4750
4751 mwl8k_fw_unlock(hw);
4752 }
4753
4754 if (rc) {
4755 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4756 free_irq(priv->pdev->irq, hw);
4757 priv->irq = -1;
4758 tasklet_disable(&priv->poll_tx_task);
4759 tasklet_disable(&priv->poll_rx_task);
4760 } else {
4761 ieee80211_wake_queues(hw);
4762 }
4763
4764 return rc;
4765 }
4766
4767 static void mwl8k_stop(struct ieee80211_hw *hw)
4768 {
4769 struct mwl8k_priv *priv = hw->priv;
4770 int i;
4771
4772 if (!priv->hw_restart_in_progress)
4773 mwl8k_cmd_radio_disable(hw);
4774
4775 ieee80211_stop_queues(hw);
4776
4777 /* Disable interrupts */
4778 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4779 if (priv->irq != -1) {
4780 free_irq(priv->pdev->irq, hw);
4781 priv->irq = -1;
4782 }
4783
4784 /* Stop finalize join worker */
4785 cancel_work_sync(&priv->finalize_join_worker);
4786 cancel_work_sync(&priv->watchdog_ba_handle);
4787 if (priv->beacon_skb != NULL)
4788 dev_kfree_skb(priv->beacon_skb);
4789
4790 /* Stop TX reclaim and RX tasklets. */
4791 tasklet_disable(&priv->poll_tx_task);
4792 tasklet_disable(&priv->poll_rx_task);
4793
4794 /* Return all skbs to mac80211 */
4795 for (i = 0; i < mwl8k_tx_queues(priv); i++)
4796 mwl8k_txq_reclaim(hw, i, INT_MAX, 1);
4797 }
4798
4799 static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image);
4800
4801 static int mwl8k_add_interface(struct ieee80211_hw *hw,
4802 struct ieee80211_vif *vif)
4803 {
4804 struct mwl8k_priv *priv = hw->priv;
4805 struct mwl8k_vif *mwl8k_vif;
4806 u32 macids_supported;
4807 int macid, rc;
4808 struct mwl8k_device_info *di;
4809
4810 /*
4811 * Reject interface creation if sniffer mode is active, as
4812 * STA operation is mutually exclusive with hardware sniffer
4813 * mode. (Sniffer mode is only used on STA firmware.)
4814 */
4815 if (priv->sniffer_enabled) {
4816 wiphy_info(hw->wiphy,
4817 "unable to create STA interface because sniffer mode is enabled\n");
4818 return -EINVAL;
4819 }
4820
4821 di = priv->device_info;
4822 switch (vif->type) {
4823 case NL80211_IFTYPE_AP:
4824 if (!priv->ap_fw && di->fw_image_ap) {
4825 /* we must load the ap fw to meet this request */
4826 if (!list_empty(&priv->vif_list))
4827 return -EBUSY;
4828 rc = mwl8k_reload_firmware(hw, di->fw_image_ap);
4829 if (rc)
4830 return rc;
4831 }
4832 macids_supported = priv->ap_macids_supported;
4833 break;
4834 case NL80211_IFTYPE_STATION:
4835 if (priv->ap_fw && di->fw_image_sta) {
4836 if (!list_empty(&priv->vif_list)) {
4837 wiphy_warn(hw->wiphy, "AP interface is running.\n"
4838 "Adding STA interface for WDS");
4839 } else {
4840 /* we must load the sta fw to
4841 * meet this request.
4842 */
4843 rc = mwl8k_reload_firmware(hw,
4844 di->fw_image_sta);
4845 if (rc)
4846 return rc;
4847 }
4848 }
4849 macids_supported = priv->sta_macids_supported;
4850 break;
4851 default:
4852 return -EINVAL;
4853 }
4854
4855 macid = ffs(macids_supported & ~priv->macids_used);
4856 if (!macid--)
4857 return -EBUSY;
4858
4859 /* Setup driver private area. */
4860 mwl8k_vif = MWL8K_VIF(vif);
4861 memset(mwl8k_vif, 0, sizeof(*mwl8k_vif));
4862 mwl8k_vif->vif = vif;
4863 mwl8k_vif->macid = macid;
4864 mwl8k_vif->seqno = 0;
4865 memcpy(mwl8k_vif->bssid, vif->addr, ETH_ALEN);
4866 mwl8k_vif->is_hw_crypto_enabled = false;
4867
4868 /* Set the mac address. */
4869 mwl8k_cmd_set_mac_addr(hw, vif, vif->addr);
4870
4871 if (vif->type == NL80211_IFTYPE_AP)
4872 mwl8k_cmd_set_new_stn_add_self(hw, vif);
4873
4874 priv->macids_used |= 1 << mwl8k_vif->macid;
4875 list_add_tail(&mwl8k_vif->list, &priv->vif_list);
4876
4877 return 0;
4878 }
4879
4880 static void mwl8k_remove_vif(struct mwl8k_priv *priv, struct mwl8k_vif *vif)
4881 {
4882 /* Has ieee80211_restart_hw re-added the removed interfaces? */
4883 if (!priv->macids_used)
4884 return;
4885
4886 priv->macids_used &= ~(1 << vif->macid);
4887 list_del(&vif->list);
4888 }
4889
4890 static void mwl8k_remove_interface(struct ieee80211_hw *hw,
4891 struct ieee80211_vif *vif)
4892 {
4893 struct mwl8k_priv *priv = hw->priv;
4894 struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4895
4896 if (vif->type == NL80211_IFTYPE_AP)
4897 mwl8k_cmd_set_new_stn_del(hw, vif, vif->addr);
4898
4899 mwl8k_cmd_del_mac_addr(hw, vif, vif->addr);
4900
4901 mwl8k_remove_vif(priv, mwl8k_vif);
4902 }
4903
4904 static void mwl8k_hw_restart_work(struct work_struct *work)
4905 {
4906 struct mwl8k_priv *priv =
4907 container_of(work, struct mwl8k_priv, fw_reload);
4908 struct ieee80211_hw *hw = priv->hw;
4909 struct mwl8k_device_info *di;
4910 int rc;
4911
4912 /* If some command is waiting for a response, clear it */
4913 if (priv->hostcmd_wait != NULL) {
4914 complete(priv->hostcmd_wait);
4915 priv->hostcmd_wait = NULL;
4916 }
4917
4918 priv->hw_restart_owner = current;
4919 di = priv->device_info;
4920 mwl8k_fw_lock(hw);
4921
4922 if (priv->ap_fw)
4923 rc = mwl8k_reload_firmware(hw, di->fw_image_ap);
4924 else
4925 rc = mwl8k_reload_firmware(hw, di->fw_image_sta);
4926
4927 if (rc)
4928 goto fail;
4929
4930 priv->hw_restart_owner = NULL;
4931 priv->hw_restart_in_progress = false;
4932
4933 /*
4934 * This unlock will wake up the queues and
4935 * also opens the command path for other
4936 * commands
4937 */
4938 mwl8k_fw_unlock(hw);
4939
4940 ieee80211_restart_hw(hw);
4941
4942 wiphy_err(hw->wiphy, "Firmware restarted successfully\n");
4943
4944 return;
4945 fail:
4946 mwl8k_fw_unlock(hw);
4947
4948 wiphy_err(hw->wiphy, "Firmware restart failed\n");
4949 }
4950
4951 static int mwl8k_config(struct ieee80211_hw *hw, u32 changed)
4952 {
4953 struct ieee80211_conf *conf = &hw->conf;
4954 struct mwl8k_priv *priv = hw->priv;
4955 int rc;
4956
4957 rc = mwl8k_fw_lock(hw);
4958 if (rc)
4959 return rc;
4960
4961 if (conf->flags & IEEE80211_CONF_IDLE)
4962 rc = mwl8k_cmd_radio_disable(hw);
4963 else
4964 rc = mwl8k_cmd_radio_enable(hw);
4965 if (rc)
4966 goto out;
4967
4968 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
4969 rc = mwl8k_cmd_set_rf_channel(hw, conf);
4970 if (rc)
4971 goto out;
4972 }
4973
4974 if (conf->power_level > 18)
4975 conf->power_level = 18;
4976
4977 if (priv->ap_fw) {
4978
4979 if (conf->flags & IEEE80211_CONF_CHANGE_POWER) {
4980 rc = mwl8k_cmd_tx_power(hw, conf, conf->power_level);
4981 if (rc)
4982 goto out;
4983 }
4984
4985
4986 } else {
4987 rc = mwl8k_cmd_rf_tx_power(hw, conf->power_level);
4988 if (rc)
4989 goto out;
4990 rc = mwl8k_cmd_mimo_config(hw, 0x7, 0x7);
4991 }
4992
4993 out:
4994 mwl8k_fw_unlock(hw);
4995
4996 return rc;
4997 }
4998
4999 static void
5000 mwl8k_bss_info_changed_sta(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5001 struct ieee80211_bss_conf *info, u32 changed)
5002 {
5003 struct mwl8k_priv *priv = hw->priv;
5004 u32 ap_legacy_rates = 0;
5005 u8 ap_mcs_rates[16];
5006 int rc;
5007
5008 if (mwl8k_fw_lock(hw))
5009 return;
5010
5011 /*
5012 * No need to capture a beacon if we're no longer associated.
5013 */
5014 if ((changed & BSS_CHANGED_ASSOC) && !vif->bss_conf.assoc)
5015 priv->capture_beacon = false;
5016
5017 /*
5018 * Get the AP's legacy and MCS rates.
5019 */
5020 if (vif->bss_conf.assoc) {
5021 struct ieee80211_sta *ap;
5022
5023 rcu_read_lock();
5024
5025 ap = ieee80211_find_sta(vif, vif->bss_conf.bssid);
5026 if (ap == NULL) {
5027 rcu_read_unlock();
5028 goto out;
5029 }
5030
5031 if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ) {
5032 ap_legacy_rates = ap->supp_rates[NL80211_BAND_2GHZ];
5033 } else {
5034 ap_legacy_rates =
5035 ap->supp_rates[NL80211_BAND_5GHZ] << 5;
5036 }
5037 memcpy(ap_mcs_rates, ap->ht_cap.mcs.rx_mask, 16);
5038
5039 rcu_read_unlock();
5040
5041 if (changed & BSS_CHANGED_ASSOC) {
5042 if (!priv->ap_fw) {
5043 rc = mwl8k_cmd_set_rate(hw, vif,
5044 ap_legacy_rates,
5045 ap_mcs_rates);
5046 if (rc)
5047 goto out;
5048
5049 rc = mwl8k_cmd_use_fixed_rate_sta(hw);
5050 if (rc)
5051 goto out;
5052 } else {
5053 int idx;
5054 int rate;
5055
5056 /* Use AP firmware specific rate command.
5057 */
5058 idx = ffs(vif->bss_conf.basic_rates);
5059 if (idx)
5060 idx--;
5061
5062 if (hw->conf.chandef.chan->band ==
5063 NL80211_BAND_2GHZ)
5064 rate = mwl8k_rates_24[idx].hw_value;
5065 else
5066 rate = mwl8k_rates_50[idx].hw_value;
5067
5068 mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate);
5069 }
5070 }
5071 }
5072
5073 if (changed & BSS_CHANGED_ERP_PREAMBLE) {
5074 rc = mwl8k_set_radio_preamble(hw,
5075 vif->bss_conf.use_short_preamble);
5076 if (rc)
5077 goto out;
5078 }
5079
5080 if ((changed & BSS_CHANGED_ERP_SLOT) && !priv->ap_fw) {
5081 rc = mwl8k_cmd_set_slot(hw, vif->bss_conf.use_short_slot);
5082 if (rc)
5083 goto out;
5084 }
5085
5086 if (vif->bss_conf.assoc && !priv->ap_fw &&
5087 (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_CTS_PROT |
5088 BSS_CHANGED_HT))) {
5089 rc = mwl8k_cmd_set_aid(hw, vif, ap_legacy_rates);
5090 if (rc)
5091 goto out;
5092 }
5093
5094 if (vif->bss_conf.assoc &&
5095 (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_BEACON_INT))) {
5096 /*
5097 * Finalize the join. Tell rx handler to process
5098 * next beacon from our BSSID.
5099 */
5100 memcpy(priv->capture_bssid, vif->bss_conf.bssid, ETH_ALEN);
5101 priv->capture_beacon = true;
5102 }
5103
5104 out:
5105 mwl8k_fw_unlock(hw);
5106 }
5107
5108 static void
5109 mwl8k_bss_info_changed_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5110 struct ieee80211_bss_conf *info, u32 changed)
5111 {
5112 int rc;
5113
5114 if (mwl8k_fw_lock(hw))
5115 return;
5116
5117 if (changed & BSS_CHANGED_ERP_PREAMBLE) {
5118 rc = mwl8k_set_radio_preamble(hw,
5119 vif->bss_conf.use_short_preamble);
5120 if (rc)
5121 goto out;
5122 }
5123
5124 if (changed & BSS_CHANGED_BASIC_RATES) {
5125 int idx;
5126 int rate;
5127
5128 /*
5129 * Use lowest supported basic rate for multicasts
5130 * and management frames (such as probe responses --
5131 * beacons will always go out at 1 Mb/s).
5132 */
5133 idx = ffs(vif->bss_conf.basic_rates);
5134 if (idx)
5135 idx--;
5136
5137 if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
5138 rate = mwl8k_rates_24[idx].hw_value;
5139 else
5140 rate = mwl8k_rates_50[idx].hw_value;
5141
5142 mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate);
5143 }
5144
5145 if (changed & (BSS_CHANGED_BEACON_INT | BSS_CHANGED_BEACON)) {
5146 struct sk_buff *skb;
5147
5148 skb = ieee80211_beacon_get(hw, vif);
5149 if (skb != NULL) {
5150 mwl8k_cmd_set_beacon(hw, vif, skb->data, skb->len);
5151 kfree_skb(skb);
5152 }
5153 }
5154
5155 if (changed & BSS_CHANGED_BEACON_ENABLED)
5156 mwl8k_cmd_bss_start(hw, vif, info->enable_beacon);
5157
5158 out:
5159 mwl8k_fw_unlock(hw);
5160 }
5161
5162 static void
5163 mwl8k_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5164 struct ieee80211_bss_conf *info, u32 changed)
5165 {
5166 if (vif->type == NL80211_IFTYPE_STATION)
5167 mwl8k_bss_info_changed_sta(hw, vif, info, changed);
5168 if (vif->type == NL80211_IFTYPE_AP)
5169 mwl8k_bss_info_changed_ap(hw, vif, info, changed);
5170 }
5171
5172 static u64 mwl8k_prepare_multicast(struct ieee80211_hw *hw,
5173 struct netdev_hw_addr_list *mc_list)
5174 {
5175 struct mwl8k_cmd_pkt *cmd;
5176
5177 /*
5178 * Synthesize and return a command packet that programs the
5179 * hardware multicast address filter. At this point we don't
5180 * know whether FIF_ALLMULTI is being requested, but if it is,
5181 * we'll end up throwing this packet away and creating a new
5182 * one in mwl8k_configure_filter().
5183 */
5184 cmd = __mwl8k_cmd_mac_multicast_adr(hw, 0, mc_list);
5185
5186 return (unsigned long)cmd;
5187 }
5188
5189 static int
5190 mwl8k_configure_filter_sniffer(struct ieee80211_hw *hw,
5191 unsigned int changed_flags,
5192 unsigned int *total_flags)
5193 {
5194 struct mwl8k_priv *priv = hw->priv;
5195
5196 /*
5197 * Hardware sniffer mode is mutually exclusive with STA
5198 * operation, so refuse to enable sniffer mode if a STA
5199 * interface is active.
5200 */
5201 if (!list_empty(&priv->vif_list)) {
5202 if (net_ratelimit())
5203 wiphy_info(hw->wiphy,
5204 "not enabling sniffer mode because STA interface is active\n");
5205 return 0;
5206 }
5207
5208 if (!priv->sniffer_enabled) {
5209 if (mwl8k_cmd_enable_sniffer(hw, 1))
5210 return 0;
5211 priv->sniffer_enabled = true;
5212 }
5213
5214 *total_flags &= FIF_ALLMULTI |
5215 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL |
5216 FIF_OTHER_BSS;
5217
5218 return 1;
5219 }
5220
5221 static struct mwl8k_vif *mwl8k_first_vif(struct mwl8k_priv *priv)
5222 {
5223 if (!list_empty(&priv->vif_list))
5224 return list_entry(priv->vif_list.next, struct mwl8k_vif, list);
5225
5226 return NULL;
5227 }
5228
5229 static void mwl8k_configure_filter(struct ieee80211_hw *hw,
5230 unsigned int changed_flags,
5231 unsigned int *total_flags,
5232 u64 multicast)
5233 {
5234 struct mwl8k_priv *priv = hw->priv;
5235 struct mwl8k_cmd_pkt *cmd = (void *)(unsigned long)multicast;
5236
5237 /*
5238 * AP firmware doesn't allow fine-grained control over
5239 * the receive filter.
5240 */
5241 if (priv->ap_fw) {
5242 *total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC;
5243 kfree(cmd);
5244 return;
5245 }
5246
5247 /*
5248 * Enable hardware sniffer mode if FIF_CONTROL or
5249 * FIF_OTHER_BSS is requested.
5250 */
5251 if (*total_flags & (FIF_CONTROL | FIF_OTHER_BSS) &&
5252 mwl8k_configure_filter_sniffer(hw, changed_flags, total_flags)) {
5253 kfree(cmd);
5254 return;
5255 }
5256
5257 /* Clear unsupported feature flags */
5258 *total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC;
5259
5260 if (mwl8k_fw_lock(hw)) {
5261 kfree(cmd);
5262 return;
5263 }
5264
5265 if (priv->sniffer_enabled) {
5266 mwl8k_cmd_enable_sniffer(hw, 0);
5267 priv->sniffer_enabled = false;
5268 }
5269
5270 if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
5271 if (*total_flags & FIF_BCN_PRBRESP_PROMISC) {
5272 /*
5273 * Disable the BSS filter.
5274 */
5275 mwl8k_cmd_set_pre_scan(hw);
5276 } else {
5277 struct mwl8k_vif *mwl8k_vif;
5278 const u8 *bssid;
5279
5280 /*
5281 * Enable the BSS filter.
5282 *
5283 * If there is an active STA interface, use that
5284 * interface's BSSID, otherwise use a dummy one
5285 * (where the OUI part needs to be nonzero for
5286 * the BSSID to be accepted by POST_SCAN).
5287 */
5288 mwl8k_vif = mwl8k_first_vif(priv);
5289 if (mwl8k_vif != NULL)
5290 bssid = mwl8k_vif->vif->bss_conf.bssid;
5291 else
5292 bssid = "\x01\x00\x00\x00\x00\x00";
5293
5294 mwl8k_cmd_set_post_scan(hw, bssid);
5295 }
5296 }
5297
5298 /*
5299 * If FIF_ALLMULTI is being requested, throw away the command
5300 * packet that ->prepare_multicast() built and replace it with
5301 * a command packet that enables reception of all multicast
5302 * packets.
5303 */
5304 if (*total_flags & FIF_ALLMULTI) {
5305 kfree(cmd);
5306 cmd = __mwl8k_cmd_mac_multicast_adr(hw, 1, NULL);
5307 }
5308
5309 if (cmd != NULL) {
5310 mwl8k_post_cmd(hw, cmd);
5311 kfree(cmd);
5312 }
5313
5314 mwl8k_fw_unlock(hw);
5315 }
5316
5317 static int mwl8k_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
5318 {
5319 return mwl8k_cmd_set_rts_threshold(hw, value);
5320 }
5321
5322 static int mwl8k_sta_remove(struct ieee80211_hw *hw,
5323 struct ieee80211_vif *vif,
5324 struct ieee80211_sta *sta)
5325 {
5326 struct mwl8k_priv *priv = hw->priv;
5327
5328 if (priv->ap_fw)
5329 return mwl8k_cmd_set_new_stn_del(hw, vif, sta->addr);
5330 else
5331 return mwl8k_cmd_update_stadb_del(hw, vif, sta->addr);
5332 }
5333
5334 static int mwl8k_sta_add(struct ieee80211_hw *hw,
5335 struct ieee80211_vif *vif,
5336 struct ieee80211_sta *sta)
5337 {
5338 struct mwl8k_priv *priv = hw->priv;
5339 int ret;
5340 int i;
5341 struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
5342 struct ieee80211_key_conf *key;
5343
5344 if (!priv->ap_fw) {
5345 ret = mwl8k_cmd_update_stadb_add(hw, vif, sta);
5346 if (ret >= 0) {
5347 MWL8K_STA(sta)->peer_id = ret;
5348 if (sta->ht_cap.ht_supported)
5349 MWL8K_STA(sta)->is_ampdu_allowed = true;
5350 ret = 0;
5351 }
5352
5353 } else {
5354 ret = mwl8k_cmd_set_new_stn_add(hw, vif, sta);
5355 }
5356
5357 for (i = 0; i < NUM_WEP_KEYS; i++) {
5358 key = IEEE80211_KEY_CONF(mwl8k_vif->wep_key_conf[i].key);
5359 if (mwl8k_vif->wep_key_conf[i].enabled)
5360 mwl8k_set_key(hw, SET_KEY, vif, sta, key);
5361 }
5362 return ret;
5363 }
5364
5365 static int mwl8k_conf_tx(struct ieee80211_hw *hw,
5366 struct ieee80211_vif *vif, u16 queue,
5367 const struct ieee80211_tx_queue_params *params)
5368 {
5369 struct mwl8k_priv *priv = hw->priv;
5370 int rc;
5371
5372 rc = mwl8k_fw_lock(hw);
5373 if (!rc) {
5374 BUG_ON(queue > MWL8K_TX_WMM_QUEUES - 1);
5375 memcpy(&priv->wmm_params[queue], params, sizeof(*params));
5376
5377 if (!priv->wmm_enabled)
5378 rc = mwl8k_cmd_set_wmm_mode(hw, 1);
5379
5380 if (!rc) {
5381 int q = MWL8K_TX_WMM_QUEUES - 1 - queue;
5382 rc = mwl8k_cmd_set_edca_params(hw, q,
5383 params->cw_min,
5384 params->cw_max,
5385 params->aifs,
5386 params->txop);
5387 }
5388
5389 mwl8k_fw_unlock(hw);
5390 }
5391
5392 return rc;
5393 }
5394
5395 static int mwl8k_get_stats(struct ieee80211_hw *hw,
5396 struct ieee80211_low_level_stats *stats)
5397 {
5398 return mwl8k_cmd_get_stat(hw, stats);
5399 }
5400
5401 static int mwl8k_get_survey(struct ieee80211_hw *hw, int idx,
5402 struct survey_info *survey)
5403 {
5404 struct mwl8k_priv *priv = hw->priv;
5405 struct ieee80211_conf *conf = &hw->conf;
5406 struct ieee80211_supported_band *sband;
5407
5408 if (priv->ap_fw) {
5409 sband = hw->wiphy->bands[NL80211_BAND_2GHZ];
5410
5411 if (sband && idx >= sband->n_channels) {
5412 idx -= sband->n_channels;
5413 sband = NULL;
5414 }
5415
5416 if (!sband)
5417 sband = hw->wiphy->bands[NL80211_BAND_5GHZ];
5418
5419 if (!sband || idx >= sband->n_channels)
5420 return -ENOENT;
5421
5422 memcpy(survey, &priv->survey[idx], sizeof(*survey));
5423 survey->channel = &sband->channels[idx];
5424
5425 return 0;
5426 }
5427
5428 if (idx != 0)
5429 return -ENOENT;
5430
5431 survey->channel = conf->chandef.chan;
5432 survey->filled = SURVEY_INFO_NOISE_DBM;
5433 survey->noise = priv->noise;
5434
5435 return 0;
5436 }
5437
5438 #define MAX_AMPDU_ATTEMPTS 5
5439
5440 static int
5441 mwl8k_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5442 struct ieee80211_ampdu_params *params)
5443 {
5444 struct ieee80211_sta *sta = params->sta;
5445 enum ieee80211_ampdu_mlme_action action = params->action;
5446 u16 tid = params->tid;
5447 u16 *ssn = &params->ssn;
5448 u8 buf_size = params->buf_size;
5449 int i, rc = 0;
5450 struct mwl8k_priv *priv = hw->priv;
5451 struct mwl8k_ampdu_stream *stream;
5452 u8 *addr = sta->addr, idx;
5453 struct mwl8k_sta *sta_info = MWL8K_STA(sta);
5454
5455 if (!ieee80211_hw_check(hw, AMPDU_AGGREGATION))
5456 return -ENOTSUPP;
5457
5458 spin_lock(&priv->stream_lock);
5459 stream = mwl8k_lookup_stream(hw, addr, tid);
5460
5461 switch (action) {
5462 case IEEE80211_AMPDU_RX_START:
5463 case IEEE80211_AMPDU_RX_STOP:
5464 break;
5465 case IEEE80211_AMPDU_TX_START:
5466 /* By the time we get here the hw queues may contain outgoing
5467 * packets for this RA/TID that are not part of this BA
5468 * session. The hw will assign sequence numbers to these
5469 * packets as they go out. So if we query the hw for its next
5470 * sequence number and use that for the SSN here, it may end up
5471 * being wrong, which will lead to sequence number mismatch at
5472 * the recipient. To avoid this, we reset the sequence number
5473 * to O for the first MPDU in this BA stream.
5474 */
5475 *ssn = 0;
5476 if (stream == NULL) {
5477 /* This means that somebody outside this driver called
5478 * ieee80211_start_tx_ba_session. This is unexpected
5479 * because we do our own rate control. Just warn and
5480 * move on.
5481 */
5482 wiphy_warn(hw->wiphy, "Unexpected call to %s. "
5483 "Proceeding anyway.\n", __func__);
5484 stream = mwl8k_add_stream(hw, sta, tid);
5485 }
5486 if (stream == NULL) {
5487 wiphy_debug(hw->wiphy, "no free AMPDU streams\n");
5488 rc = -EBUSY;
5489 break;
5490 }
5491 stream->state = AMPDU_STREAM_IN_PROGRESS;
5492
5493 /* Release the lock before we do the time consuming stuff */
5494 spin_unlock(&priv->stream_lock);
5495 for (i = 0; i < MAX_AMPDU_ATTEMPTS; i++) {
5496
5497 /* Check if link is still valid */
5498 if (!sta_info->is_ampdu_allowed) {
5499 spin_lock(&priv->stream_lock);
5500 mwl8k_remove_stream(hw, stream);
5501 spin_unlock(&priv->stream_lock);
5502 return -EBUSY;
5503 }
5504
5505 rc = mwl8k_check_ba(hw, stream, vif);
5506
5507 /* If HW restart is in progress mwl8k_post_cmd will
5508 * return -EBUSY. Avoid retrying mwl8k_check_ba in
5509 * such cases
5510 */
5511 if (!rc || rc == -EBUSY)
5512 break;
5513 /*
5514 * HW queues take time to be flushed, give them
5515 * sufficient time
5516 */
5517
5518 msleep(1000);
5519 }
5520 spin_lock(&priv->stream_lock);
5521 if (rc) {
5522 wiphy_err(hw->wiphy, "Stream for tid %d busy after %d"
5523 " attempts\n", tid, MAX_AMPDU_ATTEMPTS);
5524 mwl8k_remove_stream(hw, stream);
5525 rc = -EBUSY;
5526 break;
5527 }
5528 rc = IEEE80211_AMPDU_TX_START_IMMEDIATE;
5529 break;
5530 case IEEE80211_AMPDU_TX_STOP_CONT:
5531 case IEEE80211_AMPDU_TX_STOP_FLUSH:
5532 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
5533 if (stream) {
5534 if (stream->state == AMPDU_STREAM_ACTIVE) {
5535 idx = stream->idx;
5536 spin_unlock(&priv->stream_lock);
5537 mwl8k_destroy_ba(hw, idx);
5538 spin_lock(&priv->stream_lock);
5539 }
5540 mwl8k_remove_stream(hw, stream);
5541 }
5542 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
5543 break;
5544 case IEEE80211_AMPDU_TX_OPERATIONAL:
5545 BUG_ON(stream == NULL);
5546 BUG_ON(stream->state != AMPDU_STREAM_IN_PROGRESS);
5547 spin_unlock(&priv->stream_lock);
5548 rc = mwl8k_create_ba(hw, stream, buf_size, vif);
5549 spin_lock(&priv->stream_lock);
5550 if (!rc)
5551 stream->state = AMPDU_STREAM_ACTIVE;
5552 else {
5553 idx = stream->idx;
5554 spin_unlock(&priv->stream_lock);
5555 mwl8k_destroy_ba(hw, idx);
5556 spin_lock(&priv->stream_lock);
5557 wiphy_debug(hw->wiphy,
5558 "Failed adding stream for sta %pM tid %d\n",
5559 addr, tid);
5560 mwl8k_remove_stream(hw, stream);
5561 }
5562 break;
5563
5564 default:
5565 rc = -ENOTSUPP;
5566 }
5567
5568 spin_unlock(&priv->stream_lock);
5569 return rc;
5570 }
5571
5572 static void mwl8k_sw_scan_start(struct ieee80211_hw *hw,
5573 struct ieee80211_vif *vif,
5574 const u8 *mac_addr)
5575 {
5576 struct mwl8k_priv *priv = hw->priv;
5577 u8 tmp;
5578
5579 if (!priv->ap_fw)
5580 return;
5581
5582 /* clear all stats */
5583 priv->channel_time = 0;
5584 ioread32(priv->regs + BBU_RXRDY_CNT_REG);
5585 ioread32(priv->regs + NOK_CCA_CNT_REG);
5586 mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &tmp);
5587
5588 priv->sw_scan_start = true;
5589 }
5590
5591 static void mwl8k_sw_scan_complete(struct ieee80211_hw *hw,
5592 struct ieee80211_vif *vif)
5593 {
5594 struct mwl8k_priv *priv = hw->priv;
5595 u8 tmp;
5596
5597 if (!priv->ap_fw)
5598 return;
5599
5600 priv->sw_scan_start = false;
5601
5602 /* clear all stats */
5603 priv->channel_time = 0;
5604 ioread32(priv->regs + BBU_RXRDY_CNT_REG);
5605 ioread32(priv->regs + NOK_CCA_CNT_REG);
5606 mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &tmp);
5607 }
5608
5609 static const struct ieee80211_ops mwl8k_ops = {
5610 .tx = mwl8k_tx,
5611 .start = mwl8k_start,
5612 .stop = mwl8k_stop,
5613 .add_interface = mwl8k_add_interface,
5614 .remove_interface = mwl8k_remove_interface,
5615 .config = mwl8k_config,
5616 .bss_info_changed = mwl8k_bss_info_changed,
5617 .prepare_multicast = mwl8k_prepare_multicast,
5618 .configure_filter = mwl8k_configure_filter,
5619 .set_key = mwl8k_set_key,
5620 .set_rts_threshold = mwl8k_set_rts_threshold,
5621 .sta_add = mwl8k_sta_add,
5622 .sta_remove = mwl8k_sta_remove,
5623 .conf_tx = mwl8k_conf_tx,
5624 .get_stats = mwl8k_get_stats,
5625 .get_survey = mwl8k_get_survey,
5626 .ampdu_action = mwl8k_ampdu_action,
5627 .sw_scan_start = mwl8k_sw_scan_start,
5628 .sw_scan_complete = mwl8k_sw_scan_complete,
5629 };
5630
5631 static void mwl8k_finalize_join_worker(struct work_struct *work)
5632 {
5633 struct mwl8k_priv *priv =
5634 container_of(work, struct mwl8k_priv, finalize_join_worker);
5635 struct sk_buff *skb = priv->beacon_skb;
5636 struct ieee80211_mgmt *mgmt = (void *)skb->data;
5637 int len = skb->len - offsetof(struct ieee80211_mgmt, u.beacon.variable);
5638 const u8 *tim = cfg80211_find_ie(WLAN_EID_TIM,
5639 mgmt->u.beacon.variable, len);
5640 int dtim_period = 1;
5641
5642 if (tim && tim[1] >= 2)
5643 dtim_period = tim[3];
5644
5645 mwl8k_cmd_finalize_join(priv->hw, skb->data, skb->len, dtim_period);
5646
5647 dev_kfree_skb(skb);
5648 priv->beacon_skb = NULL;
5649 }
5650
5651 enum {
5652 MWL8363 = 0,
5653 MWL8687,
5654 MWL8366,
5655 MWL8764,
5656 };
5657
5658 #define MWL8K_8366_AP_FW_API 3
5659 #define _MWL8K_8366_AP_FW(api) "mwl8k/fmimage_8366_ap-" #api ".fw"
5660 #define MWL8K_8366_AP_FW(api) _MWL8K_8366_AP_FW(api)
5661
5662 #define MWL8K_8764_AP_FW_API 1
5663 #define _MWL8K_8764_AP_FW(api) "mwl8k/fmimage_8764_ap-" #api ".fw"
5664 #define MWL8K_8764_AP_FW(api) _MWL8K_8764_AP_FW(api)
5665
5666 static struct mwl8k_device_info mwl8k_info_tbl[] = {
5667 [MWL8363] = {
5668 .part_name = "88w8363",
5669 .helper_image = "mwl8k/helper_8363.fw",
5670 .fw_image_sta = "mwl8k/fmimage_8363.fw",
5671 },
5672 [MWL8687] = {
5673 .part_name = "88w8687",
5674 .helper_image = "mwl8k/helper_8687.fw",
5675 .fw_image_sta = "mwl8k/fmimage_8687.fw",
5676 },
5677 [MWL8366] = {
5678 .part_name = "88w8366",
5679 .helper_image = "mwl8k/helper_8366.fw",
5680 .fw_image_sta = "mwl8k/fmimage_8366.fw",
5681 .fw_image_ap = MWL8K_8366_AP_FW(MWL8K_8366_AP_FW_API),
5682 .fw_api_ap = MWL8K_8366_AP_FW_API,
5683 .ap_rxd_ops = &rxd_ap_ops,
5684 },
5685 [MWL8764] = {
5686 .part_name = "88w8764",
5687 .fw_image_ap = MWL8K_8764_AP_FW(MWL8K_8764_AP_FW_API),
5688 .fw_api_ap = MWL8K_8764_AP_FW_API,
5689 .ap_rxd_ops = &rxd_ap_ops,
5690 },
5691 };
5692
5693 MODULE_FIRMWARE("mwl8k/helper_8363.fw");
5694 MODULE_FIRMWARE("mwl8k/fmimage_8363.fw");
5695 MODULE_FIRMWARE("mwl8k/helper_8687.fw");
5696 MODULE_FIRMWARE("mwl8k/fmimage_8687.fw");
5697 MODULE_FIRMWARE("mwl8k/helper_8366.fw");
5698 MODULE_FIRMWARE("mwl8k/fmimage_8366.fw");
5699 MODULE_FIRMWARE(MWL8K_8366_AP_FW(MWL8K_8366_AP_FW_API));
5700
5701 static const struct pci_device_id mwl8k_pci_id_table[] = {
5702 { PCI_VDEVICE(MARVELL, 0x2a0a), .driver_data = MWL8363, },
5703 { PCI_VDEVICE(MARVELL, 0x2a0c), .driver_data = MWL8363, },
5704 { PCI_VDEVICE(MARVELL, 0x2a24), .driver_data = MWL8363, },
5705 { PCI_VDEVICE(MARVELL, 0x2a2b), .driver_data = MWL8687, },
5706 { PCI_VDEVICE(MARVELL, 0x2a30), .driver_data = MWL8687, },
5707 { PCI_VDEVICE(MARVELL, 0x2a40), .driver_data = MWL8366, },
5708 { PCI_VDEVICE(MARVELL, 0x2a41), .driver_data = MWL8366, },
5709 { PCI_VDEVICE(MARVELL, 0x2a42), .driver_data = MWL8366, },
5710 { PCI_VDEVICE(MARVELL, 0x2a43), .driver_data = MWL8366, },
5711 { PCI_VDEVICE(MARVELL, 0x2b36), .driver_data = MWL8764, },
5712 { },
5713 };
5714 MODULE_DEVICE_TABLE(pci, mwl8k_pci_id_table);
5715
5716 static int mwl8k_request_alt_fw(struct mwl8k_priv *priv)
5717 {
5718 int rc;
5719 printk(KERN_ERR "%s: Error requesting preferred fw %s.\n"
5720 "Trying alternative firmware %s\n", pci_name(priv->pdev),
5721 priv->fw_pref, priv->fw_alt);
5722 rc = mwl8k_request_fw(priv, priv->fw_alt, &priv->fw_ucode, true);
5723 if (rc) {
5724 printk(KERN_ERR "%s: Error requesting alt fw %s\n",
5725 pci_name(priv->pdev), priv->fw_alt);
5726 return rc;
5727 }
5728 return 0;
5729 }
5730
5731 static int mwl8k_firmware_load_success(struct mwl8k_priv *priv);
5732 static void mwl8k_fw_state_machine(const struct firmware *fw, void *context)
5733 {
5734 struct mwl8k_priv *priv = context;
5735 struct mwl8k_device_info *di = priv->device_info;
5736 int rc;
5737
5738 switch (priv->fw_state) {
5739 case FW_STATE_INIT:
5740 if (!fw) {
5741 printk(KERN_ERR "%s: Error requesting helper fw %s\n",
5742 pci_name(priv->pdev), di->helper_image);
5743 goto fail;
5744 }
5745 priv->fw_helper = fw;
5746 rc = mwl8k_request_fw(priv, priv->fw_pref, &priv->fw_ucode,
5747 true);
5748 if (rc && priv->fw_alt) {
5749 rc = mwl8k_request_alt_fw(priv);
5750 if (rc)
5751 goto fail;
5752 priv->fw_state = FW_STATE_LOADING_ALT;
5753 } else if (rc)
5754 goto fail;
5755 else
5756 priv->fw_state = FW_STATE_LOADING_PREF;
5757 break;
5758
5759 case FW_STATE_LOADING_PREF:
5760 if (!fw) {
5761 if (priv->fw_alt) {
5762 rc = mwl8k_request_alt_fw(priv);
5763 if (rc)
5764 goto fail;
5765 priv->fw_state = FW_STATE_LOADING_ALT;
5766 } else
5767 goto fail;
5768 } else {
5769 priv->fw_ucode = fw;
5770 rc = mwl8k_firmware_load_success(priv);
5771 if (rc)
5772 goto fail;
5773 else
5774 complete(&priv->firmware_loading_complete);
5775 }
5776 break;
5777
5778 case FW_STATE_LOADING_ALT:
5779 if (!fw) {
5780 printk(KERN_ERR "%s: Error requesting alt fw %s\n",
5781 pci_name(priv->pdev), di->helper_image);
5782 goto fail;
5783 }
5784 priv->fw_ucode = fw;
5785 rc = mwl8k_firmware_load_success(priv);
5786 if (rc)
5787 goto fail;
5788 else
5789 complete(&priv->firmware_loading_complete);
5790 break;
5791
5792 default:
5793 printk(KERN_ERR "%s: Unexpected firmware loading state: %d\n",
5794 MWL8K_NAME, priv->fw_state);
5795 BUG_ON(1);
5796 }
5797
5798 return;
5799
5800 fail:
5801 priv->fw_state = FW_STATE_ERROR;
5802 complete(&priv->firmware_loading_complete);
5803 device_release_driver(&priv->pdev->dev);
5804 mwl8k_release_firmware(priv);
5805 }
5806
5807 #define MAX_RESTART_ATTEMPTS 1
5808 static int mwl8k_init_firmware(struct ieee80211_hw *hw, char *fw_image,
5809 bool nowait)
5810 {
5811 struct mwl8k_priv *priv = hw->priv;
5812 int rc;
5813 int count = MAX_RESTART_ATTEMPTS;
5814
5815 retry:
5816 /* Reset firmware and hardware */
5817 mwl8k_hw_reset(priv);
5818
5819 /* Ask userland hotplug daemon for the device firmware */
5820 rc = mwl8k_request_firmware(priv, fw_image, nowait);
5821 if (rc) {
5822 wiphy_err(hw->wiphy, "Firmware files not found\n");
5823 return rc;
5824 }
5825
5826 if (nowait)
5827 return rc;
5828
5829 /* Load firmware into hardware */
5830 rc = mwl8k_load_firmware(hw);
5831 if (rc)
5832 wiphy_err(hw->wiphy, "Cannot start firmware\n");
5833
5834 /* Reclaim memory once firmware is successfully loaded */
5835 mwl8k_release_firmware(priv);
5836
5837 if (rc && count) {
5838 /* FW did not start successfully;
5839 * lets try one more time
5840 */
5841 count--;
5842 wiphy_err(hw->wiphy, "Trying to reload the firmware again\n");
5843 msleep(20);
5844 goto retry;
5845 }
5846
5847 return rc;
5848 }
5849
5850 static int mwl8k_init_txqs(struct ieee80211_hw *hw)
5851 {
5852 struct mwl8k_priv *priv = hw->priv;
5853 int rc = 0;
5854 int i;
5855
5856 for (i = 0; i < mwl8k_tx_queues(priv); i++) {
5857 rc = mwl8k_txq_init(hw, i);
5858 if (rc)
5859 break;
5860 if (priv->ap_fw)
5861 iowrite32(priv->txq[i].txd_dma,
5862 priv->sram + priv->txq_offset[i]);
5863 }
5864 return rc;
5865 }
5866
5867 /* initialize hw after successfully loading a firmware image */
5868 static int mwl8k_probe_hw(struct ieee80211_hw *hw)
5869 {
5870 struct mwl8k_priv *priv = hw->priv;
5871 int rc = 0;
5872 int i;
5873
5874 if (priv->ap_fw) {
5875 priv->rxd_ops = priv->device_info->ap_rxd_ops;
5876 if (priv->rxd_ops == NULL) {
5877 wiphy_err(hw->wiphy,
5878 "Driver does not have AP firmware image support for this hardware\n");
5879 rc = -ENOENT;
5880 goto err_stop_firmware;
5881 }
5882 } else {
5883 priv->rxd_ops = &rxd_sta_ops;
5884 }
5885
5886 priv->sniffer_enabled = false;
5887 priv->wmm_enabled = false;
5888 priv->pending_tx_pkts = 0;
5889 atomic_set(&priv->watchdog_event_pending, 0);
5890
5891 rc = mwl8k_rxq_init(hw, 0);
5892 if (rc)
5893 goto err_stop_firmware;
5894 rxq_refill(hw, 0, INT_MAX);
5895
5896 /* For the sta firmware, we need to know the dma addresses of tx queues
5897 * before sending MWL8K_CMD_GET_HW_SPEC. So we must initialize them
5898 * prior to issuing this command. But for the AP case, we learn the
5899 * total number of queues from the result CMD_GET_HW_SPEC, so for this
5900 * case we must initialize the tx queues after.
5901 */
5902 priv->num_ampdu_queues = 0;
5903 if (!priv->ap_fw) {
5904 rc = mwl8k_init_txqs(hw);
5905 if (rc)
5906 goto err_free_queues;
5907 }
5908
5909 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
5910 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5911 iowrite32(MWL8K_A2H_INT_TX_DONE|MWL8K_A2H_INT_RX_READY|
5912 MWL8K_A2H_INT_BA_WATCHDOG,
5913 priv->regs + MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL);
5914 iowrite32(MWL8K_A2H_INT_OPC_DONE,
5915 priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
5916
5917 rc = request_irq(priv->pdev->irq, mwl8k_interrupt,
5918 IRQF_SHARED, MWL8K_NAME, hw);
5919 if (rc) {
5920 wiphy_err(hw->wiphy, "failed to register IRQ handler\n");
5921 goto err_free_queues;
5922 }
5923
5924 /*
5925 * When hw restart is requested,
5926 * mac80211 will take care of clearing
5927 * the ampdu streams, so do not clear
5928 * the ampdu state here
5929 */
5930 if (!priv->hw_restart_in_progress)
5931 memset(priv->ampdu, 0, sizeof(priv->ampdu));
5932
5933 /*
5934 * Temporarily enable interrupts. Initial firmware host
5935 * commands use interrupts and avoid polling. Disable
5936 * interrupts when done.
5937 */
5938 iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5939
5940 /* Get config data, mac addrs etc */
5941 if (priv->ap_fw) {
5942 rc = mwl8k_cmd_get_hw_spec_ap(hw);
5943 if (!rc)
5944 rc = mwl8k_init_txqs(hw);
5945 if (!rc)
5946 rc = mwl8k_cmd_set_hw_spec(hw);
5947 } else {
5948 rc = mwl8k_cmd_get_hw_spec_sta(hw);
5949 }
5950 if (rc) {
5951 wiphy_err(hw->wiphy, "Cannot initialise firmware\n");
5952 goto err_free_irq;
5953 }
5954
5955 /* Turn radio off */
5956 rc = mwl8k_cmd_radio_disable(hw);
5957 if (rc) {
5958 wiphy_err(hw->wiphy, "Cannot disable\n");
5959 goto err_free_irq;
5960 }
5961
5962 /* Clear MAC address */
5963 rc = mwl8k_cmd_set_mac_addr(hw, NULL, "\x00\x00\x00\x00\x00\x00");
5964 if (rc) {
5965 wiphy_err(hw->wiphy, "Cannot clear MAC address\n");
5966 goto err_free_irq;
5967 }
5968
5969 /* Configure Antennas */
5970 rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_RX, 0x3);
5971 if (rc)
5972 wiphy_warn(hw->wiphy, "failed to set # of RX antennas");
5973 rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_TX, 0x7);
5974 if (rc)
5975 wiphy_warn(hw->wiphy, "failed to set # of TX antennas");
5976
5977
5978 /* Disable interrupts */
5979 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5980 free_irq(priv->pdev->irq, hw);
5981
5982 wiphy_info(hw->wiphy, "%s v%d, %pm, %s firmware %u.%u.%u.%u\n",
5983 priv->device_info->part_name,
5984 priv->hw_rev, hw->wiphy->perm_addr,
5985 priv->ap_fw ? "AP" : "STA",
5986 (priv->fw_rev >> 24) & 0xff, (priv->fw_rev >> 16) & 0xff,
5987 (priv->fw_rev >> 8) & 0xff, priv->fw_rev & 0xff);
5988
5989 return 0;
5990
5991 err_free_irq:
5992 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5993 free_irq(priv->pdev->irq, hw);
5994
5995 err_free_queues:
5996 for (i = 0; i < mwl8k_tx_queues(priv); i++)
5997 mwl8k_txq_deinit(hw, i);
5998 mwl8k_rxq_deinit(hw, 0);
5999
6000 err_stop_firmware:
6001 mwl8k_hw_reset(priv);
6002
6003 return rc;
6004 }
6005
6006 /*
6007 * invoke mwl8k_reload_firmware to change the firmware image after the device
6008 * has already been registered
6009 */
6010 static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image)
6011 {
6012 int i, rc = 0;
6013 struct mwl8k_priv *priv = hw->priv;
6014 struct mwl8k_vif *vif, *tmp_vif;
6015
6016 mwl8k_stop(hw);
6017 mwl8k_rxq_deinit(hw, 0);
6018
6019 /*
6020 * All the existing interfaces are re-added by the ieee80211_reconfig;
6021 * which means driver should remove existing interfaces before calling
6022 * ieee80211_restart_hw
6023 */
6024 if (priv->hw_restart_in_progress)
6025 list_for_each_entry_safe(vif, tmp_vif, &priv->vif_list, list)
6026 mwl8k_remove_vif(priv, vif);
6027
6028 for (i = 0; i < mwl8k_tx_queues(priv); i++)
6029 mwl8k_txq_deinit(hw, i);
6030
6031 rc = mwl8k_init_firmware(hw, fw_image, false);
6032 if (rc)
6033 goto fail;
6034
6035 rc = mwl8k_probe_hw(hw);
6036 if (rc)
6037 goto fail;
6038
6039 if (priv->hw_restart_in_progress)
6040 return rc;
6041
6042 rc = mwl8k_start(hw);
6043 if (rc)
6044 goto fail;
6045
6046 rc = mwl8k_config(hw, ~0);
6047 if (rc)
6048 goto fail;
6049
6050 for (i = 0; i < MWL8K_TX_WMM_QUEUES; i++) {
6051 rc = mwl8k_conf_tx(hw, NULL, i, &priv->wmm_params[i]);
6052 if (rc)
6053 goto fail;
6054 }
6055
6056 return rc;
6057
6058 fail:
6059 printk(KERN_WARNING "mwl8k: Failed to reload firmware image.\n");
6060 return rc;
6061 }
6062
6063 static const struct ieee80211_iface_limit ap_if_limits[] = {
6064 { .max = 8, .types = BIT(NL80211_IFTYPE_AP) },
6065 { .max = 1, .types = BIT(NL80211_IFTYPE_STATION) },
6066 };
6067
6068 static const struct ieee80211_iface_combination ap_if_comb = {
6069 .limits = ap_if_limits,
6070 .n_limits = ARRAY_SIZE(ap_if_limits),
6071 .max_interfaces = 8,
6072 .num_different_channels = 1,
6073 };
6074
6075
6076 static int mwl8k_firmware_load_success(struct mwl8k_priv *priv)
6077 {
6078 struct ieee80211_hw *hw = priv->hw;
6079 int i, rc;
6080
6081 rc = mwl8k_load_firmware(hw);
6082 mwl8k_release_firmware(priv);
6083 if (rc) {
6084 wiphy_err(hw->wiphy, "Cannot start firmware\n");
6085 return rc;
6086 }
6087
6088 /*
6089 * Extra headroom is the size of the required DMA header
6090 * minus the size of the smallest 802.11 frame (CTS frame).
6091 */
6092 hw->extra_tx_headroom =
6093 sizeof(struct mwl8k_dma_data) - sizeof(struct ieee80211_cts);
6094
6095 hw->extra_tx_headroom -= priv->ap_fw ? REDUCED_TX_HEADROOM : 0;
6096
6097 hw->queues = MWL8K_TX_WMM_QUEUES;
6098
6099 /* Set rssi values to dBm */
6100 ieee80211_hw_set(hw, SIGNAL_DBM);
6101 ieee80211_hw_set(hw, HAS_RATE_CONTROL);
6102
6103 /*
6104 * Ask mac80211 to not to trigger PS mode
6105 * based on PM bit of incoming frames.
6106 */
6107 if (priv->ap_fw)
6108 ieee80211_hw_set(hw, AP_LINK_PS);
6109
6110 hw->vif_data_size = sizeof(struct mwl8k_vif);
6111 hw->sta_data_size = sizeof(struct mwl8k_sta);
6112
6113 priv->macids_used = 0;
6114 INIT_LIST_HEAD(&priv->vif_list);
6115
6116 /* Set default radio state and preamble */
6117 priv->radio_on = false;
6118 priv->radio_short_preamble = false;
6119
6120 /* Finalize join worker */
6121 INIT_WORK(&priv->finalize_join_worker, mwl8k_finalize_join_worker);
6122 /* Handle watchdog ba events */
6123 INIT_WORK(&priv->watchdog_ba_handle, mwl8k_watchdog_ba_events);
6124 /* To reload the firmware if it crashes */
6125 INIT_WORK(&priv->fw_reload, mwl8k_hw_restart_work);
6126
6127 /* TX reclaim and RX tasklets. */
6128 tasklet_setup(&priv->poll_tx_task, mwl8k_tx_poll);
6129 tasklet_disable(&priv->poll_tx_task);
6130 tasklet_setup(&priv->poll_rx_task, mwl8k_rx_poll);
6131 tasklet_disable(&priv->poll_rx_task);
6132
6133 /* Power management cookie */
6134 priv->cookie = dma_alloc_coherent(&priv->pdev->dev, 4,
6135 &priv->cookie_dma, GFP_KERNEL);
6136 if (priv->cookie == NULL)
6137 return -ENOMEM;
6138
6139 mutex_init(&priv->fw_mutex);
6140 priv->fw_mutex_owner = NULL;
6141 priv->fw_mutex_depth = 0;
6142 priv->hostcmd_wait = NULL;
6143
6144 spin_lock_init(&priv->tx_lock);
6145
6146 spin_lock_init(&priv->stream_lock);
6147
6148 priv->tx_wait = NULL;
6149
6150 rc = mwl8k_probe_hw(hw);
6151 if (rc)
6152 goto err_free_cookie;
6153
6154 hw->wiphy->interface_modes = 0;
6155
6156 if (priv->ap_macids_supported || priv->device_info->fw_image_ap) {
6157 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP);
6158 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION);
6159 hw->wiphy->iface_combinations = &ap_if_comb;
6160 hw->wiphy->n_iface_combinations = 1;
6161 }
6162
6163 if (priv->sta_macids_supported || priv->device_info->fw_image_sta)
6164 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION);
6165
6166 wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
6167
6168 rc = ieee80211_register_hw(hw);
6169 if (rc) {
6170 wiphy_err(hw->wiphy, "Cannot register device\n");
6171 goto err_unprobe_hw;
6172 }
6173
6174 return 0;
6175
6176 err_unprobe_hw:
6177 for (i = 0; i < mwl8k_tx_queues(priv); i++)
6178 mwl8k_txq_deinit(hw, i);
6179 mwl8k_rxq_deinit(hw, 0);
6180
6181 err_free_cookie:
6182 if (priv->cookie != NULL)
6183 dma_free_coherent(&priv->pdev->dev, 4, priv->cookie,
6184 priv->cookie_dma);
6185
6186 return rc;
6187 }
6188 static int mwl8k_probe(struct pci_dev *pdev,
6189 const struct pci_device_id *id)
6190 {
6191 static int printed_version;
6192 struct ieee80211_hw *hw;
6193 struct mwl8k_priv *priv;
6194 struct mwl8k_device_info *di;
6195 int rc;
6196
6197 if (!printed_version) {
6198 printk(KERN_INFO "%s version %s\n", MWL8K_DESC, MWL8K_VERSION);
6199 printed_version = 1;
6200 }
6201
6202
6203 rc = pci_enable_device(pdev);
6204 if (rc) {
6205 printk(KERN_ERR "%s: Cannot enable new PCI device\n",
6206 MWL8K_NAME);
6207 return rc;
6208 }
6209
6210 rc = pci_request_regions(pdev, MWL8K_NAME);
6211 if (rc) {
6212 printk(KERN_ERR "%s: Cannot obtain PCI resources\n",
6213 MWL8K_NAME);
6214 goto err_disable_device;
6215 }
6216
6217 pci_set_master(pdev);
6218
6219
6220 hw = ieee80211_alloc_hw(sizeof(*priv), &mwl8k_ops);
6221 if (hw == NULL) {
6222 printk(KERN_ERR "%s: ieee80211 alloc failed\n", MWL8K_NAME);
6223 rc = -ENOMEM;
6224 goto err_free_reg;
6225 }
6226
6227 SET_IEEE80211_DEV(hw, &pdev->dev);
6228 pci_set_drvdata(pdev, hw);
6229
6230 priv = hw->priv;
6231 priv->hw = hw;
6232 priv->pdev = pdev;
6233 priv->device_info = &mwl8k_info_tbl[id->driver_data];
6234
6235 if (id->driver_data == MWL8764)
6236 priv->is_8764 = true;
6237
6238 priv->sram = pci_iomap(pdev, 0, 0x10000);
6239 if (priv->sram == NULL) {
6240 wiphy_err(hw->wiphy, "Cannot map device SRAM\n");
6241 rc = -EIO;
6242 goto err_iounmap;
6243 }
6244
6245 /*
6246 * If BAR0 is a 32 bit BAR, the register BAR will be BAR1.
6247 * If BAR0 is a 64 bit BAR, the register BAR will be BAR2.
6248 */
6249 priv->regs = pci_iomap(pdev, 1, 0x10000);
6250 if (priv->regs == NULL) {
6251 priv->regs = pci_iomap(pdev, 2, 0x10000);
6252 if (priv->regs == NULL) {
6253 wiphy_err(hw->wiphy, "Cannot map device registers\n");
6254 rc = -EIO;
6255 goto err_iounmap;
6256 }
6257 }
6258
6259 /*
6260 * Choose the initial fw image depending on user input. If a second
6261 * image is available, make it the alternative image that will be
6262 * loaded if the first one fails.
6263 */
6264 init_completion(&priv->firmware_loading_complete);
6265 di = priv->device_info;
6266 if (ap_mode_default && di->fw_image_ap) {
6267 priv->fw_pref = di->fw_image_ap;
6268 priv->fw_alt = di->fw_image_sta;
6269 } else if (!ap_mode_default && di->fw_image_sta) {
6270 priv->fw_pref = di->fw_image_sta;
6271 priv->fw_alt = di->fw_image_ap;
6272 } else if (ap_mode_default && !di->fw_image_ap && di->fw_image_sta) {
6273 printk(KERN_WARNING "AP fw is unavailable. Using STA fw.");
6274 priv->fw_pref = di->fw_image_sta;
6275 } else if (!ap_mode_default && !di->fw_image_sta && di->fw_image_ap) {
6276 printk(KERN_WARNING "STA fw is unavailable. Using AP fw.");
6277 priv->fw_pref = di->fw_image_ap;
6278 }
6279 rc = mwl8k_init_firmware(hw, priv->fw_pref, true);
6280 if (rc)
6281 goto err_stop_firmware;
6282
6283 priv->hw_restart_in_progress = false;
6284
6285 priv->running_bsses = 0;
6286
6287 return rc;
6288
6289 err_stop_firmware:
6290 mwl8k_hw_reset(priv);
6291
6292 err_iounmap:
6293 if (priv->regs != NULL)
6294 pci_iounmap(pdev, priv->regs);
6295
6296 if (priv->sram != NULL)
6297 pci_iounmap(pdev, priv->sram);
6298
6299 ieee80211_free_hw(hw);
6300
6301 err_free_reg:
6302 pci_release_regions(pdev);
6303
6304 err_disable_device:
6305 pci_disable_device(pdev);
6306
6307 return rc;
6308 }
6309
6310 static void mwl8k_remove(struct pci_dev *pdev)
6311 {
6312 struct ieee80211_hw *hw = pci_get_drvdata(pdev);
6313 struct mwl8k_priv *priv;
6314 int i;
6315
6316 if (hw == NULL)
6317 return;
6318 priv = hw->priv;
6319
6320 wait_for_completion(&priv->firmware_loading_complete);
6321
6322 if (priv->fw_state == FW_STATE_ERROR) {
6323 mwl8k_hw_reset(priv);
6324 goto unmap;
6325 }
6326
6327 ieee80211_stop_queues(hw);
6328
6329 ieee80211_unregister_hw(hw);
6330
6331 /* Remove TX reclaim and RX tasklets. */
6332 tasklet_kill(&priv->poll_tx_task);
6333 tasklet_kill(&priv->poll_rx_task);
6334
6335 /* Stop hardware */
6336 mwl8k_hw_reset(priv);
6337
6338 /* Return all skbs to mac80211 */
6339 for (i = 0; i < mwl8k_tx_queues(priv); i++)
6340 mwl8k_txq_reclaim(hw, i, INT_MAX, 1);
6341
6342 for (i = 0; i < mwl8k_tx_queues(priv); i++)
6343 mwl8k_txq_deinit(hw, i);
6344
6345 mwl8k_rxq_deinit(hw, 0);
6346
6347 dma_free_coherent(&priv->pdev->dev, 4, priv->cookie, priv->cookie_dma);
6348
6349 unmap:
6350 pci_iounmap(pdev, priv->regs);
6351 pci_iounmap(pdev, priv->sram);
6352 ieee80211_free_hw(hw);
6353 pci_release_regions(pdev);
6354 pci_disable_device(pdev);
6355 }
6356
6357 static struct pci_driver mwl8k_driver = {
6358 .name = MWL8K_NAME,
6359 .id_table = mwl8k_pci_id_table,
6360 .probe = mwl8k_probe,
6361 .remove = mwl8k_remove,
6362 };
6363
6364 module_pci_driver(mwl8k_driver);
6365
6366 MODULE_DESCRIPTION(MWL8K_DESC);
6367 MODULE_VERSION(MWL8K_VERSION);
6368 MODULE_AUTHOR("Lennert Buytenhek <buytenh@marvell.com>");
6369 MODULE_LICENSE("GPL");
Linux with added FPC-III support