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
mwl8k_cmd_name(__le16 cmd,char * buf,int bufsize)444 static const char *mwl8k_cmd_name(__le16 cmd, char *buf, int bufsize)
445 {
446 u16 command = le16_to_cpu(cmd);
447
448 #define MWL8K_CMDNAME(x) case MWL8K_CMD_##x: do {\
449 snprintf(buf, bufsize, "%s", #x);\
450 return buf;\
451 } while (0)
452 switch (command & ~0x8000) {
453 MWL8K_CMDNAME(CODE_DNLD);
454 MWL8K_CMDNAME(GET_HW_SPEC);
455 MWL8K_CMDNAME(SET_HW_SPEC);
456 MWL8K_CMDNAME(MAC_MULTICAST_ADR);
457 MWL8K_CMDNAME(GET_STAT);
458 MWL8K_CMDNAME(RADIO_CONTROL);
459 MWL8K_CMDNAME(RF_TX_POWER);
460 MWL8K_CMDNAME(TX_POWER);
461 MWL8K_CMDNAME(RF_ANTENNA);
462 MWL8K_CMDNAME(SET_BEACON);
463 MWL8K_CMDNAME(SET_PRE_SCAN);
464 MWL8K_CMDNAME(SET_POST_SCAN);
465 MWL8K_CMDNAME(SET_RF_CHANNEL);
466 MWL8K_CMDNAME(SET_AID);
467 MWL8K_CMDNAME(SET_RATE);
468 MWL8K_CMDNAME(SET_FINALIZE_JOIN);
469 MWL8K_CMDNAME(RTS_THRESHOLD);
470 MWL8K_CMDNAME(SET_SLOT);
471 MWL8K_CMDNAME(SET_EDCA_PARAMS);
472 MWL8K_CMDNAME(SET_WMM_MODE);
473 MWL8K_CMDNAME(MIMO_CONFIG);
474 MWL8K_CMDNAME(USE_FIXED_RATE);
475 MWL8K_CMDNAME(ENABLE_SNIFFER);
476 MWL8K_CMDNAME(SET_MAC_ADDR);
477 MWL8K_CMDNAME(SET_RATEADAPT_MODE);
478 MWL8K_CMDNAME(BSS_START);
479 MWL8K_CMDNAME(SET_NEW_STN);
480 MWL8K_CMDNAME(UPDATE_ENCRYPTION);
481 MWL8K_CMDNAME(UPDATE_STADB);
482 MWL8K_CMDNAME(BASTREAM);
483 MWL8K_CMDNAME(GET_WATCHDOG_BITMAP);
484 default:
485 snprintf(buf, bufsize, "0x%x", cmd);
486 }
487 #undef MWL8K_CMDNAME
488
489 return buf;
490 }
491
492 /* Hardware and firmware reset */
mwl8k_hw_reset(struct mwl8k_priv * priv)493 static void mwl8k_hw_reset(struct mwl8k_priv *priv)
494 {
495 iowrite32(MWL8K_H2A_INT_RESET,
496 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
497 iowrite32(MWL8K_H2A_INT_RESET,
498 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
499 msleep(20);
500 }
501
502 /* Release fw image */
mwl8k_release_fw(const struct firmware ** fw)503 static void mwl8k_release_fw(const struct firmware **fw)
504 {
505 if (*fw == NULL)
506 return;
507 release_firmware(*fw);
508 *fw = NULL;
509 }
510
mwl8k_release_firmware(struct mwl8k_priv * priv)511 static void mwl8k_release_firmware(struct mwl8k_priv *priv)
512 {
513 mwl8k_release_fw(&priv->fw_ucode);
514 mwl8k_release_fw(&priv->fw_helper);
515 }
516
517 /* states for asynchronous f/w loading */
518 static void mwl8k_fw_state_machine(const struct firmware *fw, void *context);
519 enum {
520 FW_STATE_INIT = 0,
521 FW_STATE_LOADING_PREF,
522 FW_STATE_LOADING_ALT,
523 FW_STATE_ERROR,
524 };
525
526 /* Request fw image */
mwl8k_request_fw(struct mwl8k_priv * priv,const char * fname,const struct firmware ** fw,bool nowait)527 static int mwl8k_request_fw(struct mwl8k_priv *priv,
528 const char *fname, const struct firmware **fw,
529 bool nowait)
530 {
531 /* release current image */
532 if (*fw != NULL)
533 mwl8k_release_fw(fw);
534
535 if (nowait)
536 return request_firmware_nowait(THIS_MODULE, 1, fname,
537 &priv->pdev->dev, GFP_KERNEL,
538 priv, mwl8k_fw_state_machine);
539 else
540 return request_firmware(fw, fname, &priv->pdev->dev);
541 }
542
mwl8k_request_firmware(struct mwl8k_priv * priv,char * fw_image,bool nowait)543 static int mwl8k_request_firmware(struct mwl8k_priv *priv, char *fw_image,
544 bool nowait)
545 {
546 struct mwl8k_device_info *di = priv->device_info;
547 int rc;
548
549 if (di->helper_image != NULL) {
550 if (nowait)
551 rc = mwl8k_request_fw(priv, di->helper_image,
552 &priv->fw_helper, true);
553 else
554 rc = mwl8k_request_fw(priv, di->helper_image,
555 &priv->fw_helper, false);
556 if (rc)
557 printk(KERN_ERR "%s: Error requesting helper fw %s\n",
558 pci_name(priv->pdev), di->helper_image);
559
560 if (rc || nowait)
561 return rc;
562 }
563
564 if (nowait) {
565 /*
566 * if we get here, no helper image is needed. Skip the
567 * FW_STATE_INIT state.
568 */
569 priv->fw_state = FW_STATE_LOADING_PREF;
570 rc = mwl8k_request_fw(priv, fw_image,
571 &priv->fw_ucode,
572 true);
573 } else
574 rc = mwl8k_request_fw(priv, fw_image,
575 &priv->fw_ucode, false);
576 if (rc) {
577 printk(KERN_ERR "%s: Error requesting firmware file %s\n",
578 pci_name(priv->pdev), fw_image);
579 mwl8k_release_fw(&priv->fw_helper);
580 return rc;
581 }
582
583 return 0;
584 }
585
586 struct mwl8k_cmd_pkt {
587 __le16 code;
588 __le16 length;
589 __u8 seq_num;
590 __u8 macid;
591 __le16 result;
592 char payload[0];
593 } __packed;
594
595 /*
596 * Firmware loading.
597 */
598 static int
mwl8k_send_fw_load_cmd(struct mwl8k_priv * priv,void * data,int length)599 mwl8k_send_fw_load_cmd(struct mwl8k_priv *priv, void *data, int length)
600 {
601 void __iomem *regs = priv->regs;
602 dma_addr_t dma_addr;
603 int loops;
604
605 dma_addr = pci_map_single(priv->pdev, data, length, PCI_DMA_TODEVICE);
606 if (pci_dma_mapping_error(priv->pdev, dma_addr))
607 return -ENOMEM;
608
609 iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
610 iowrite32(0, regs + MWL8K_HIU_INT_CODE);
611 iowrite32(MWL8K_H2A_INT_DOORBELL,
612 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
613 iowrite32(MWL8K_H2A_INT_DUMMY,
614 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
615
616 loops = 1000;
617 do {
618 u32 int_code;
619 if (priv->is_8764) {
620 int_code = ioread32(regs +
621 MWL8K_HIU_H2A_INTERRUPT_STATUS);
622 if (int_code == 0)
623 break;
624 } else {
625 int_code = ioread32(regs + MWL8K_HIU_INT_CODE);
626 if (int_code == MWL8K_INT_CODE_CMD_FINISHED) {
627 iowrite32(0, regs + MWL8K_HIU_INT_CODE);
628 break;
629 }
630 }
631 cond_resched();
632 udelay(1);
633 } while (--loops);
634
635 pci_unmap_single(priv->pdev, dma_addr, length, PCI_DMA_TODEVICE);
636
637 return loops ? 0 : -ETIMEDOUT;
638 }
639
mwl8k_load_fw_image(struct mwl8k_priv * priv,const u8 * data,size_t length)640 static int mwl8k_load_fw_image(struct mwl8k_priv *priv,
641 const u8 *data, size_t length)
642 {
643 struct mwl8k_cmd_pkt *cmd;
644 int done;
645 int rc = 0;
646
647 cmd = kmalloc(sizeof(*cmd) + 256, GFP_KERNEL);
648 if (cmd == NULL)
649 return -ENOMEM;
650
651 cmd->code = cpu_to_le16(MWL8K_CMD_CODE_DNLD);
652 cmd->seq_num = 0;
653 cmd->macid = 0;
654 cmd->result = 0;
655
656 done = 0;
657 while (length) {
658 int block_size = length > 256 ? 256 : length;
659
660 memcpy(cmd->payload, data + done, block_size);
661 cmd->length = cpu_to_le16(block_size);
662
663 rc = mwl8k_send_fw_load_cmd(priv, cmd,
664 sizeof(*cmd) + block_size);
665 if (rc)
666 break;
667
668 done += block_size;
669 length -= block_size;
670 }
671
672 if (!rc) {
673 cmd->length = 0;
674 rc = mwl8k_send_fw_load_cmd(priv, cmd, sizeof(*cmd));
675 }
676
677 kfree(cmd);
678
679 return rc;
680 }
681
mwl8k_feed_fw_image(struct mwl8k_priv * priv,const u8 * data,size_t length)682 static int mwl8k_feed_fw_image(struct mwl8k_priv *priv,
683 const u8 *data, size_t length)
684 {
685 unsigned char *buffer;
686 int may_continue, rc = 0;
687 u32 done, prev_block_size;
688
689 buffer = kmalloc(1024, GFP_KERNEL);
690 if (buffer == NULL)
691 return -ENOMEM;
692
693 done = 0;
694 prev_block_size = 0;
695 may_continue = 1000;
696 while (may_continue > 0) {
697 u32 block_size;
698
699 block_size = ioread32(priv->regs + MWL8K_HIU_SCRATCH);
700 if (block_size & 1) {
701 block_size &= ~1;
702 may_continue--;
703 } else {
704 done += prev_block_size;
705 length -= prev_block_size;
706 }
707
708 if (block_size > 1024 || block_size > length) {
709 rc = -EOVERFLOW;
710 break;
711 }
712
713 if (length == 0) {
714 rc = 0;
715 break;
716 }
717
718 if (block_size == 0) {
719 rc = -EPROTO;
720 may_continue--;
721 udelay(1);
722 continue;
723 }
724
725 prev_block_size = block_size;
726 memcpy(buffer, data + done, block_size);
727
728 rc = mwl8k_send_fw_load_cmd(priv, buffer, block_size);
729 if (rc)
730 break;
731 }
732
733 if (!rc && length != 0)
734 rc = -EREMOTEIO;
735
736 kfree(buffer);
737
738 return rc;
739 }
740
mwl8k_load_firmware(struct ieee80211_hw * hw)741 static int mwl8k_load_firmware(struct ieee80211_hw *hw)
742 {
743 struct mwl8k_priv *priv = hw->priv;
744 const struct firmware *fw = priv->fw_ucode;
745 int rc;
746 int loops;
747
748 if (!memcmp(fw->data, "\x01\x00\x00\x00", 4) && !priv->is_8764) {
749 const struct firmware *helper = priv->fw_helper;
750
751 if (helper == NULL) {
752 printk(KERN_ERR "%s: helper image needed but none "
753 "given\n", pci_name(priv->pdev));
754 return -EINVAL;
755 }
756
757 rc = mwl8k_load_fw_image(priv, helper->data, helper->size);
758 if (rc) {
759 printk(KERN_ERR "%s: unable to load firmware "
760 "helper image\n", pci_name(priv->pdev));
761 return rc;
762 }
763 msleep(20);
764
765 rc = mwl8k_feed_fw_image(priv, fw->data, fw->size);
766 } else {
767 if (priv->is_8764)
768 rc = mwl8k_feed_fw_image(priv, fw->data, fw->size);
769 else
770 rc = mwl8k_load_fw_image(priv, fw->data, fw->size);
771 }
772
773 if (rc) {
774 printk(KERN_ERR "%s: unable to load firmware image\n",
775 pci_name(priv->pdev));
776 return rc;
777 }
778
779 iowrite32(MWL8K_MODE_STA, priv->regs + MWL8K_HIU_GEN_PTR);
780
781 loops = 500000;
782 do {
783 u32 ready_code;
784
785 ready_code = ioread32(priv->regs + MWL8K_HIU_INT_CODE);
786 if (ready_code == MWL8K_FWAP_READY) {
787 priv->ap_fw = true;
788 break;
789 } else if (ready_code == MWL8K_FWSTA_READY) {
790 priv->ap_fw = false;
791 break;
792 }
793
794 cond_resched();
795 udelay(1);
796 } while (--loops);
797
798 return loops ? 0 : -ETIMEDOUT;
799 }
800
801
802 /* DMA header used by firmware and hardware. */
803 struct mwl8k_dma_data {
804 __le16 fwlen;
805 struct ieee80211_hdr wh;
806 char data[0];
807 } __packed;
808
809 /* Routines to add/remove DMA header from skb. */
mwl8k_remove_dma_header(struct sk_buff * skb,__le16 qos)810 static inline void mwl8k_remove_dma_header(struct sk_buff *skb, __le16 qos)
811 {
812 struct mwl8k_dma_data *tr;
813 int hdrlen;
814
815 tr = (struct mwl8k_dma_data *)skb->data;
816 hdrlen = ieee80211_hdrlen(tr->wh.frame_control);
817
818 if (hdrlen != sizeof(tr->wh)) {
819 if (ieee80211_is_data_qos(tr->wh.frame_control)) {
820 memmove(tr->data - hdrlen, &tr->wh, hdrlen - 2);
821 *((__le16 *)(tr->data - 2)) = qos;
822 } else {
823 memmove(tr->data - hdrlen, &tr->wh, hdrlen);
824 }
825 }
826
827 if (hdrlen != sizeof(*tr))
828 skb_pull(skb, sizeof(*tr) - hdrlen);
829 }
830
831 #define REDUCED_TX_HEADROOM 8
832
833 static void
mwl8k_add_dma_header(struct mwl8k_priv * priv,struct sk_buff * skb,int head_pad,int tail_pad)834 mwl8k_add_dma_header(struct mwl8k_priv *priv, struct sk_buff *skb,
835 int head_pad, int tail_pad)
836 {
837 struct ieee80211_hdr *wh;
838 int hdrlen;
839 int reqd_hdrlen;
840 struct mwl8k_dma_data *tr;
841
842 /*
843 * Add a firmware DMA header; the firmware requires that we
844 * present a 2-byte payload length followed by a 4-address
845 * header (without QoS field), followed (optionally) by any
846 * WEP/ExtIV header (but only filled in for CCMP).
847 */
848 wh = (struct ieee80211_hdr *)skb->data;
849
850 hdrlen = ieee80211_hdrlen(wh->frame_control);
851
852 /*
853 * Check if skb_resize is required because of
854 * tx_headroom adjustment.
855 */
856 if (priv->ap_fw && (hdrlen < (sizeof(struct ieee80211_cts)
857 + REDUCED_TX_HEADROOM))) {
858 if (pskb_expand_head(skb, REDUCED_TX_HEADROOM, 0, GFP_ATOMIC)) {
859
860 wiphy_err(priv->hw->wiphy,
861 "Failed to reallocate TX buffer\n");
862 return;
863 }
864 skb->truesize += REDUCED_TX_HEADROOM;
865 }
866
867 reqd_hdrlen = sizeof(*tr) + head_pad;
868
869 if (hdrlen != reqd_hdrlen)
870 skb_push(skb, reqd_hdrlen - hdrlen);
871
872 if (ieee80211_is_data_qos(wh->frame_control))
873 hdrlen -= IEEE80211_QOS_CTL_LEN;
874
875 tr = (struct mwl8k_dma_data *)skb->data;
876 if (wh != &tr->wh)
877 memmove(&tr->wh, wh, hdrlen);
878 if (hdrlen != sizeof(tr->wh))
879 memset(((void *)&tr->wh) + hdrlen, 0, sizeof(tr->wh) - hdrlen);
880
881 /*
882 * Firmware length is the length of the fully formed "802.11
883 * payload". That is, everything except for the 802.11 header.
884 * This includes all crypto material including the MIC.
885 */
886 tr->fwlen = cpu_to_le16(skb->len - sizeof(*tr) + tail_pad);
887 }
888
mwl8k_encapsulate_tx_frame(struct mwl8k_priv * priv,struct sk_buff * skb)889 static void mwl8k_encapsulate_tx_frame(struct mwl8k_priv *priv,
890 struct sk_buff *skb)
891 {
892 struct ieee80211_hdr *wh;
893 struct ieee80211_tx_info *tx_info;
894 struct ieee80211_key_conf *key_conf;
895 int data_pad;
896 int head_pad = 0;
897
898 wh = (struct ieee80211_hdr *)skb->data;
899
900 tx_info = IEEE80211_SKB_CB(skb);
901
902 key_conf = NULL;
903 if (ieee80211_is_data(wh->frame_control))
904 key_conf = tx_info->control.hw_key;
905
906 /*
907 * Make sure the packet header is in the DMA header format (4-address
908 * without QoS), and add head & tail padding when HW crypto is enabled.
909 *
910 * We have the following trailer padding requirements:
911 * - WEP: 4 trailer bytes (ICV)
912 * - TKIP: 12 trailer bytes (8 MIC + 4 ICV)
913 * - CCMP: 8 trailer bytes (MIC)
914 */
915 data_pad = 0;
916 if (key_conf != NULL) {
917 head_pad = key_conf->iv_len;
918 switch (key_conf->cipher) {
919 case WLAN_CIPHER_SUITE_WEP40:
920 case WLAN_CIPHER_SUITE_WEP104:
921 data_pad = 4;
922 break;
923 case WLAN_CIPHER_SUITE_TKIP:
924 data_pad = 12;
925 break;
926 case WLAN_CIPHER_SUITE_CCMP:
927 data_pad = 8;
928 break;
929 }
930 }
931 mwl8k_add_dma_header(priv, skb, head_pad, data_pad);
932 }
933
934 /*
935 * Packet reception for 88w8366/88w8764 AP firmware.
936 */
937 struct mwl8k_rxd_ap {
938 __le16 pkt_len;
939 __u8 sq2;
940 __u8 rate;
941 __le32 pkt_phys_addr;
942 __le32 next_rxd_phys_addr;
943 __le16 qos_control;
944 __le16 htsig2;
945 __le32 hw_rssi_info;
946 __le32 hw_noise_floor_info;
947 __u8 noise_floor;
948 __u8 pad0[3];
949 __u8 rssi;
950 __u8 rx_status;
951 __u8 channel;
952 __u8 rx_ctrl;
953 } __packed;
954
955 #define MWL8K_AP_RATE_INFO_MCS_FORMAT 0x80
956 #define MWL8K_AP_RATE_INFO_40MHZ 0x40
957 #define MWL8K_AP_RATE_INFO_RATEID(x) ((x) & 0x3f)
958
959 #define MWL8K_AP_RX_CTRL_OWNED_BY_HOST 0x80
960
961 /* 8366/8764 AP rx_status bits */
962 #define MWL8K_AP_RXSTAT_DECRYPT_ERR_MASK 0x80
963 #define MWL8K_AP_RXSTAT_GENERAL_DECRYPT_ERR 0xFF
964 #define MWL8K_AP_RXSTAT_TKIP_DECRYPT_MIC_ERR 0x02
965 #define MWL8K_AP_RXSTAT_WEP_DECRYPT_ICV_ERR 0x04
966 #define MWL8K_AP_RXSTAT_TKIP_DECRYPT_ICV_ERR 0x08
967
mwl8k_rxd_ap_init(void * _rxd,dma_addr_t next_dma_addr)968 static void mwl8k_rxd_ap_init(void *_rxd, dma_addr_t next_dma_addr)
969 {
970 struct mwl8k_rxd_ap *rxd = _rxd;
971
972 rxd->next_rxd_phys_addr = cpu_to_le32(next_dma_addr);
973 rxd->rx_ctrl = MWL8K_AP_RX_CTRL_OWNED_BY_HOST;
974 }
975
mwl8k_rxd_ap_refill(void * _rxd,dma_addr_t addr,int len)976 static void mwl8k_rxd_ap_refill(void *_rxd, dma_addr_t addr, int len)
977 {
978 struct mwl8k_rxd_ap *rxd = _rxd;
979
980 rxd->pkt_len = cpu_to_le16(len);
981 rxd->pkt_phys_addr = cpu_to_le32(addr);
982 wmb();
983 rxd->rx_ctrl = 0;
984 }
985
986 static int
mwl8k_rxd_ap_process(void * _rxd,struct ieee80211_rx_status * status,__le16 * qos,s8 * noise)987 mwl8k_rxd_ap_process(void *_rxd, struct ieee80211_rx_status *status,
988 __le16 *qos, s8 *noise)
989 {
990 struct mwl8k_rxd_ap *rxd = _rxd;
991
992 if (!(rxd->rx_ctrl & MWL8K_AP_RX_CTRL_OWNED_BY_HOST))
993 return -1;
994 rmb();
995
996 memset(status, 0, sizeof(*status));
997
998 status->signal = -rxd->rssi;
999 *noise = -rxd->noise_floor;
1000
1001 if (rxd->rate & MWL8K_AP_RATE_INFO_MCS_FORMAT) {
1002 status->encoding = RX_ENC_HT;
1003 if (rxd->rate & MWL8K_AP_RATE_INFO_40MHZ)
1004 status->bw = RATE_INFO_BW_40;
1005 status->rate_idx = MWL8K_AP_RATE_INFO_RATEID(rxd->rate);
1006 } else {
1007 int i;
1008
1009 for (i = 0; i < ARRAY_SIZE(mwl8k_rates_24); i++) {
1010 if (mwl8k_rates_24[i].hw_value == rxd->rate) {
1011 status->rate_idx = i;
1012 break;
1013 }
1014 }
1015 }
1016
1017 if (rxd->channel > 14) {
1018 status->band = NL80211_BAND_5GHZ;
1019 if (!(status->encoding == RX_ENC_HT))
1020 status->rate_idx -= 5;
1021 } else {
1022 status->band = NL80211_BAND_2GHZ;
1023 }
1024 status->freq = ieee80211_channel_to_frequency(rxd->channel,
1025 status->band);
1026
1027 *qos = rxd->qos_control;
1028
1029 if ((rxd->rx_status != MWL8K_AP_RXSTAT_GENERAL_DECRYPT_ERR) &&
1030 (rxd->rx_status & MWL8K_AP_RXSTAT_DECRYPT_ERR_MASK) &&
1031 (rxd->rx_status & MWL8K_AP_RXSTAT_TKIP_DECRYPT_MIC_ERR))
1032 status->flag |= RX_FLAG_MMIC_ERROR;
1033
1034 return le16_to_cpu(rxd->pkt_len);
1035 }
1036
1037 static struct rxd_ops rxd_ap_ops = {
1038 .rxd_size = sizeof(struct mwl8k_rxd_ap),
1039 .rxd_init = mwl8k_rxd_ap_init,
1040 .rxd_refill = mwl8k_rxd_ap_refill,
1041 .rxd_process = mwl8k_rxd_ap_process,
1042 };
1043
1044 /*
1045 * Packet reception for STA firmware.
1046 */
1047 struct mwl8k_rxd_sta {
1048 __le16 pkt_len;
1049 __u8 link_quality;
1050 __u8 noise_level;
1051 __le32 pkt_phys_addr;
1052 __le32 next_rxd_phys_addr;
1053 __le16 qos_control;
1054 __le16 rate_info;
1055 __le32 pad0[4];
1056 __u8 rssi;
1057 __u8 channel;
1058 __le16 pad1;
1059 __u8 rx_ctrl;
1060 __u8 rx_status;
1061 __u8 pad2[2];
1062 } __packed;
1063
1064 #define MWL8K_STA_RATE_INFO_SHORTPRE 0x8000
1065 #define MWL8K_STA_RATE_INFO_ANTSELECT(x) (((x) >> 11) & 0x3)
1066 #define MWL8K_STA_RATE_INFO_RATEID(x) (((x) >> 3) & 0x3f)
1067 #define MWL8K_STA_RATE_INFO_40MHZ 0x0004
1068 #define MWL8K_STA_RATE_INFO_SHORTGI 0x0002
1069 #define MWL8K_STA_RATE_INFO_MCS_FORMAT 0x0001
1070
1071 #define MWL8K_STA_RX_CTRL_OWNED_BY_HOST 0x02
1072 #define MWL8K_STA_RX_CTRL_DECRYPT_ERROR 0x04
1073 /* ICV=0 or MIC=1 */
1074 #define MWL8K_STA_RX_CTRL_DEC_ERR_TYPE 0x08
1075 /* Key is uploaded only in failure case */
1076 #define MWL8K_STA_RX_CTRL_KEY_INDEX 0x30
1077
mwl8k_rxd_sta_init(void * _rxd,dma_addr_t next_dma_addr)1078 static void mwl8k_rxd_sta_init(void *_rxd, dma_addr_t next_dma_addr)
1079 {
1080 struct mwl8k_rxd_sta *rxd = _rxd;
1081
1082 rxd->next_rxd_phys_addr = cpu_to_le32(next_dma_addr);
1083 rxd->rx_ctrl = MWL8K_STA_RX_CTRL_OWNED_BY_HOST;
1084 }
1085
mwl8k_rxd_sta_refill(void * _rxd,dma_addr_t addr,int len)1086 static void mwl8k_rxd_sta_refill(void *_rxd, dma_addr_t addr, int len)
1087 {
1088 struct mwl8k_rxd_sta *rxd = _rxd;
1089
1090 rxd->pkt_len = cpu_to_le16(len);
1091 rxd->pkt_phys_addr = cpu_to_le32(addr);
1092 wmb();
1093 rxd->rx_ctrl = 0;
1094 }
1095
1096 static int
mwl8k_rxd_sta_process(void * _rxd,struct ieee80211_rx_status * status,__le16 * qos,s8 * noise)1097 mwl8k_rxd_sta_process(void *_rxd, struct ieee80211_rx_status *status,
1098 __le16 *qos, s8 *noise)
1099 {
1100 struct mwl8k_rxd_sta *rxd = _rxd;
1101 u16 rate_info;
1102
1103 if (!(rxd->rx_ctrl & MWL8K_STA_RX_CTRL_OWNED_BY_HOST))
1104 return -1;
1105 rmb();
1106
1107 rate_info = le16_to_cpu(rxd->rate_info);
1108
1109 memset(status, 0, sizeof(*status));
1110
1111 status->signal = -rxd->rssi;
1112 *noise = -rxd->noise_level;
1113 status->antenna = MWL8K_STA_RATE_INFO_ANTSELECT(rate_info);
1114 status->rate_idx = MWL8K_STA_RATE_INFO_RATEID(rate_info);
1115
1116 if (rate_info & MWL8K_STA_RATE_INFO_SHORTPRE)
1117 status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
1118 if (rate_info & MWL8K_STA_RATE_INFO_40MHZ)
1119 status->bw = RATE_INFO_BW_40;
1120 if (rate_info & MWL8K_STA_RATE_INFO_SHORTGI)
1121 status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
1122 if (rate_info & MWL8K_STA_RATE_INFO_MCS_FORMAT)
1123 status->encoding = RX_ENC_HT;
1124
1125 if (rxd->channel > 14) {
1126 status->band = NL80211_BAND_5GHZ;
1127 if (!(status->encoding == RX_ENC_HT))
1128 status->rate_idx -= 5;
1129 } else {
1130 status->band = NL80211_BAND_2GHZ;
1131 }
1132 status->freq = ieee80211_channel_to_frequency(rxd->channel,
1133 status->band);
1134
1135 *qos = rxd->qos_control;
1136 if ((rxd->rx_ctrl & MWL8K_STA_RX_CTRL_DECRYPT_ERROR) &&
1137 (rxd->rx_ctrl & MWL8K_STA_RX_CTRL_DEC_ERR_TYPE))
1138 status->flag |= RX_FLAG_MMIC_ERROR;
1139
1140 return le16_to_cpu(rxd->pkt_len);
1141 }
1142
1143 static struct rxd_ops rxd_sta_ops = {
1144 .rxd_size = sizeof(struct mwl8k_rxd_sta),
1145 .rxd_init = mwl8k_rxd_sta_init,
1146 .rxd_refill = mwl8k_rxd_sta_refill,
1147 .rxd_process = mwl8k_rxd_sta_process,
1148 };
1149
1150
1151 #define MWL8K_RX_DESCS 256
1152 #define MWL8K_RX_MAXSZ 3800
1153
mwl8k_rxq_init(struct ieee80211_hw * hw,int index)1154 static int mwl8k_rxq_init(struct ieee80211_hw *hw, int index)
1155 {
1156 struct mwl8k_priv *priv = hw->priv;
1157 struct mwl8k_rx_queue *rxq = priv->rxq + index;
1158 int size;
1159 int i;
1160
1161 rxq->rxd_count = 0;
1162 rxq->head = 0;
1163 rxq->tail = 0;
1164
1165 size = MWL8K_RX_DESCS * priv->rxd_ops->rxd_size;
1166
1167 rxq->rxd = pci_zalloc_consistent(priv->pdev, size, &rxq->rxd_dma);
1168 if (rxq->rxd == NULL) {
1169 wiphy_err(hw->wiphy, "failed to alloc RX descriptors\n");
1170 return -ENOMEM;
1171 }
1172
1173 rxq->buf = kcalloc(MWL8K_RX_DESCS, sizeof(*rxq->buf), GFP_KERNEL);
1174 if (rxq->buf == NULL) {
1175 pci_free_consistent(priv->pdev, size, rxq->rxd, rxq->rxd_dma);
1176 return -ENOMEM;
1177 }
1178
1179 for (i = 0; i < MWL8K_RX_DESCS; i++) {
1180 int desc_size;
1181 void *rxd;
1182 int nexti;
1183 dma_addr_t next_dma_addr;
1184
1185 desc_size = priv->rxd_ops->rxd_size;
1186 rxd = rxq->rxd + (i * priv->rxd_ops->rxd_size);
1187
1188 nexti = i + 1;
1189 if (nexti == MWL8K_RX_DESCS)
1190 nexti = 0;
1191 next_dma_addr = rxq->rxd_dma + (nexti * desc_size);
1192
1193 priv->rxd_ops->rxd_init(rxd, next_dma_addr);
1194 }
1195
1196 return 0;
1197 }
1198
rxq_refill(struct ieee80211_hw * hw,int index,int limit)1199 static int rxq_refill(struct ieee80211_hw *hw, int index, int limit)
1200 {
1201 struct mwl8k_priv *priv = hw->priv;
1202 struct mwl8k_rx_queue *rxq = priv->rxq + index;
1203 int refilled;
1204
1205 refilled = 0;
1206 while (rxq->rxd_count < MWL8K_RX_DESCS && limit--) {
1207 struct sk_buff *skb;
1208 dma_addr_t addr;
1209 int rx;
1210 void *rxd;
1211
1212 skb = dev_alloc_skb(MWL8K_RX_MAXSZ);
1213 if (skb == NULL)
1214 break;
1215
1216 addr = pci_map_single(priv->pdev, skb->data,
1217 MWL8K_RX_MAXSZ, DMA_FROM_DEVICE);
1218
1219 rxq->rxd_count++;
1220 rx = rxq->tail++;
1221 if (rxq->tail == MWL8K_RX_DESCS)
1222 rxq->tail = 0;
1223 rxq->buf[rx].skb = skb;
1224 dma_unmap_addr_set(&rxq->buf[rx], dma, addr);
1225
1226 rxd = rxq->rxd + (rx * priv->rxd_ops->rxd_size);
1227 priv->rxd_ops->rxd_refill(rxd, addr, MWL8K_RX_MAXSZ);
1228
1229 refilled++;
1230 }
1231
1232 return refilled;
1233 }
1234
1235 /* Must be called only when the card's reception is completely halted */
mwl8k_rxq_deinit(struct ieee80211_hw * hw,int index)1236 static void mwl8k_rxq_deinit(struct ieee80211_hw *hw, int index)
1237 {
1238 struct mwl8k_priv *priv = hw->priv;
1239 struct mwl8k_rx_queue *rxq = priv->rxq + index;
1240 int i;
1241
1242 if (rxq->rxd == NULL)
1243 return;
1244
1245 for (i = 0; i < MWL8K_RX_DESCS; i++) {
1246 if (rxq->buf[i].skb != NULL) {
1247 pci_unmap_single(priv->pdev,
1248 dma_unmap_addr(&rxq->buf[i], dma),
1249 MWL8K_RX_MAXSZ, PCI_DMA_FROMDEVICE);
1250 dma_unmap_addr_set(&rxq->buf[i], dma, 0);
1251
1252 kfree_skb(rxq->buf[i].skb);
1253 rxq->buf[i].skb = NULL;
1254 }
1255 }
1256
1257 kfree(rxq->buf);
1258 rxq->buf = NULL;
1259
1260 pci_free_consistent(priv->pdev,
1261 MWL8K_RX_DESCS * priv->rxd_ops->rxd_size,
1262 rxq->rxd, rxq->rxd_dma);
1263 rxq->rxd = NULL;
1264 }
1265
1266
1267 /*
1268 * Scan a list of BSSIDs to process for finalize join.
1269 * Allows for extension to process multiple BSSIDs.
1270 */
1271 static inline int
mwl8k_capture_bssid(struct mwl8k_priv * priv,struct ieee80211_hdr * wh)1272 mwl8k_capture_bssid(struct mwl8k_priv *priv, struct ieee80211_hdr *wh)
1273 {
1274 return priv->capture_beacon &&
1275 ieee80211_is_beacon(wh->frame_control) &&
1276 ether_addr_equal_64bits(wh->addr3, priv->capture_bssid);
1277 }
1278
mwl8k_save_beacon(struct ieee80211_hw * hw,struct sk_buff * skb)1279 static inline void mwl8k_save_beacon(struct ieee80211_hw *hw,
1280 struct sk_buff *skb)
1281 {
1282 struct mwl8k_priv *priv = hw->priv;
1283
1284 priv->capture_beacon = false;
1285 eth_zero_addr(priv->capture_bssid);
1286
1287 /*
1288 * Use GFP_ATOMIC as rxq_process is called from
1289 * the primary interrupt handler, memory allocation call
1290 * must not sleep.
1291 */
1292 priv->beacon_skb = skb_copy(skb, GFP_ATOMIC);
1293 if (priv->beacon_skb != NULL)
1294 ieee80211_queue_work(hw, &priv->finalize_join_worker);
1295 }
1296
mwl8k_find_vif_bss(struct list_head * vif_list,u8 * bssid)1297 static inline struct mwl8k_vif *mwl8k_find_vif_bss(struct list_head *vif_list,
1298 u8 *bssid)
1299 {
1300 struct mwl8k_vif *mwl8k_vif;
1301
1302 list_for_each_entry(mwl8k_vif,
1303 vif_list, list) {
1304 if (memcmp(bssid, mwl8k_vif->bssid,
1305 ETH_ALEN) == 0)
1306 return mwl8k_vif;
1307 }
1308
1309 return NULL;
1310 }
1311
rxq_process(struct ieee80211_hw * hw,int index,int limit)1312 static int rxq_process(struct ieee80211_hw *hw, int index, int limit)
1313 {
1314 struct mwl8k_priv *priv = hw->priv;
1315 struct mwl8k_vif *mwl8k_vif = NULL;
1316 struct mwl8k_rx_queue *rxq = priv->rxq + index;
1317 int processed;
1318
1319 processed = 0;
1320 while (rxq->rxd_count && limit--) {
1321 struct sk_buff *skb;
1322 void *rxd;
1323 int pkt_len;
1324 struct ieee80211_rx_status status;
1325 struct ieee80211_hdr *wh;
1326 __le16 qos;
1327
1328 skb = rxq->buf[rxq->head].skb;
1329 if (skb == NULL)
1330 break;
1331
1332 rxd = rxq->rxd + (rxq->head * priv->rxd_ops->rxd_size);
1333
1334 pkt_len = priv->rxd_ops->rxd_process(rxd, &status, &qos,
1335 &priv->noise);
1336 if (pkt_len < 0)
1337 break;
1338
1339 rxq->buf[rxq->head].skb = NULL;
1340
1341 pci_unmap_single(priv->pdev,
1342 dma_unmap_addr(&rxq->buf[rxq->head], dma),
1343 MWL8K_RX_MAXSZ, PCI_DMA_FROMDEVICE);
1344 dma_unmap_addr_set(&rxq->buf[rxq->head], dma, 0);
1345
1346 rxq->head++;
1347 if (rxq->head == MWL8K_RX_DESCS)
1348 rxq->head = 0;
1349
1350 rxq->rxd_count--;
1351
1352 wh = &((struct mwl8k_dma_data *)skb->data)->wh;
1353
1354 /*
1355 * Check for a pending join operation. Save a
1356 * copy of the beacon and schedule a tasklet to
1357 * send a FINALIZE_JOIN command to the firmware.
1358 */
1359 if (mwl8k_capture_bssid(priv, (void *)skb->data))
1360 mwl8k_save_beacon(hw, skb);
1361
1362 if (ieee80211_has_protected(wh->frame_control)) {
1363
1364 /* Check if hw crypto has been enabled for
1365 * this bss. If yes, set the status flags
1366 * accordingly
1367 */
1368 mwl8k_vif = mwl8k_find_vif_bss(&priv->vif_list,
1369 wh->addr1);
1370
1371 if (mwl8k_vif != NULL &&
1372 mwl8k_vif->is_hw_crypto_enabled) {
1373 /*
1374 * When MMIC ERROR is encountered
1375 * by the firmware, payload is
1376 * dropped and only 32 bytes of
1377 * mwl8k Firmware header is sent
1378 * to the host.
1379 *
1380 * We need to add four bytes of
1381 * key information. In it
1382 * MAC80211 expects keyidx set to
1383 * 0 for triggering Counter
1384 * Measure of MMIC failure.
1385 */
1386 if (status.flag & RX_FLAG_MMIC_ERROR) {
1387 struct mwl8k_dma_data *tr;
1388 tr = (struct mwl8k_dma_data *)skb->data;
1389 memset((void *)&(tr->data), 0, 4);
1390 pkt_len += 4;
1391 }
1392
1393 if (!ieee80211_is_auth(wh->frame_control))
1394 status.flag |= RX_FLAG_IV_STRIPPED |
1395 RX_FLAG_DECRYPTED |
1396 RX_FLAG_MMIC_STRIPPED;
1397 }
1398 }
1399
1400 skb_put(skb, pkt_len);
1401 mwl8k_remove_dma_header(skb, qos);
1402 memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
1403 ieee80211_rx_irqsafe(hw, skb);
1404
1405 processed++;
1406 }
1407
1408 return processed;
1409 }
1410
1411
1412 /*
1413 * Packet transmission.
1414 */
1415
1416 #define MWL8K_TXD_STATUS_OK 0x00000001
1417 #define MWL8K_TXD_STATUS_OK_RETRY 0x00000002
1418 #define MWL8K_TXD_STATUS_OK_MORE_RETRY 0x00000004
1419 #define MWL8K_TXD_STATUS_MULTICAST_TX 0x00000008
1420 #define MWL8K_TXD_STATUS_FW_OWNED 0x80000000
1421
1422 #define MWL8K_QOS_QLEN_UNSPEC 0xff00
1423 #define MWL8K_QOS_ACK_POLICY_MASK 0x0060
1424 #define MWL8K_QOS_ACK_POLICY_NORMAL 0x0000
1425 #define MWL8K_QOS_ACK_POLICY_BLOCKACK 0x0060
1426 #define MWL8K_QOS_EOSP 0x0010
1427
1428 struct mwl8k_tx_desc {
1429 __le32 status;
1430 __u8 data_rate;
1431 __u8 tx_priority;
1432 __le16 qos_control;
1433 __le32 pkt_phys_addr;
1434 __le16 pkt_len;
1435 __u8 dest_MAC_addr[ETH_ALEN];
1436 __le32 next_txd_phys_addr;
1437 __le32 timestamp;
1438 __le16 rate_info;
1439 __u8 peer_id;
1440 __u8 tx_frag_cnt;
1441 } __packed;
1442
1443 #define MWL8K_TX_DESCS 128
1444
mwl8k_txq_init(struct ieee80211_hw * hw,int index)1445 static int mwl8k_txq_init(struct ieee80211_hw *hw, int index)
1446 {
1447 struct mwl8k_priv *priv = hw->priv;
1448 struct mwl8k_tx_queue *txq = priv->txq + index;
1449 int size;
1450 int i;
1451
1452 txq->len = 0;
1453 txq->head = 0;
1454 txq->tail = 0;
1455
1456 size = MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc);
1457
1458 txq->txd = pci_zalloc_consistent(priv->pdev, size, &txq->txd_dma);
1459 if (txq->txd == NULL) {
1460 wiphy_err(hw->wiphy, "failed to alloc TX descriptors\n");
1461 return -ENOMEM;
1462 }
1463
1464 txq->skb = kcalloc(MWL8K_TX_DESCS, sizeof(*txq->skb), GFP_KERNEL);
1465 if (txq->skb == NULL) {
1466 pci_free_consistent(priv->pdev, size, txq->txd, txq->txd_dma);
1467 return -ENOMEM;
1468 }
1469
1470 for (i = 0; i < MWL8K_TX_DESCS; i++) {
1471 struct mwl8k_tx_desc *tx_desc;
1472 int nexti;
1473
1474 tx_desc = txq->txd + i;
1475 nexti = (i + 1) % MWL8K_TX_DESCS;
1476
1477 tx_desc->status = 0;
1478 tx_desc->next_txd_phys_addr =
1479 cpu_to_le32(txq->txd_dma + nexti * sizeof(*tx_desc));
1480 }
1481
1482 return 0;
1483 }
1484
mwl8k_tx_start(struct mwl8k_priv * priv)1485 static inline void mwl8k_tx_start(struct mwl8k_priv *priv)
1486 {
1487 iowrite32(MWL8K_H2A_INT_PPA_READY,
1488 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
1489 iowrite32(MWL8K_H2A_INT_DUMMY,
1490 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
1491 ioread32(priv->regs + MWL8K_HIU_INT_CODE);
1492 }
1493
mwl8k_dump_tx_rings(struct ieee80211_hw * hw)1494 static void mwl8k_dump_tx_rings(struct ieee80211_hw *hw)
1495 {
1496 struct mwl8k_priv *priv = hw->priv;
1497 int i;
1498
1499 for (i = 0; i < mwl8k_tx_queues(priv); i++) {
1500 struct mwl8k_tx_queue *txq = priv->txq + i;
1501 int fw_owned = 0;
1502 int drv_owned = 0;
1503 int unused = 0;
1504 int desc;
1505
1506 for (desc = 0; desc < MWL8K_TX_DESCS; desc++) {
1507 struct mwl8k_tx_desc *tx_desc = txq->txd + desc;
1508 u32 status;
1509
1510 status = le32_to_cpu(tx_desc->status);
1511 if (status & MWL8K_TXD_STATUS_FW_OWNED)
1512 fw_owned++;
1513 else
1514 drv_owned++;
1515
1516 if (tx_desc->pkt_len == 0)
1517 unused++;
1518 }
1519
1520 wiphy_err(hw->wiphy,
1521 "txq[%d] len=%d head=%d tail=%d "
1522 "fw_owned=%d drv_owned=%d unused=%d\n",
1523 i,
1524 txq->len, txq->head, txq->tail,
1525 fw_owned, drv_owned, unused);
1526 }
1527 }
1528
1529 /*
1530 * Must be called with priv->fw_mutex held and tx queues stopped.
1531 */
1532 #define MWL8K_TX_WAIT_TIMEOUT_MS 5000
1533
mwl8k_tx_wait_empty(struct ieee80211_hw * hw)1534 static int mwl8k_tx_wait_empty(struct ieee80211_hw *hw)
1535 {
1536 struct mwl8k_priv *priv = hw->priv;
1537 DECLARE_COMPLETION_ONSTACK(tx_wait);
1538 int retry;
1539 int rc;
1540
1541 might_sleep();
1542
1543 /* Since fw restart is in progress, allow only the firmware
1544 * commands from the restart code and block the other
1545 * commands since they are going to fail in any case since
1546 * the firmware has crashed
1547 */
1548 if (priv->hw_restart_in_progress) {
1549 if (priv->hw_restart_owner == current)
1550 return 0;
1551 else
1552 return -EBUSY;
1553 }
1554
1555 if (atomic_read(&priv->watchdog_event_pending))
1556 return 0;
1557
1558 /*
1559 * The TX queues are stopped at this point, so this test
1560 * doesn't need to take ->tx_lock.
1561 */
1562 if (!priv->pending_tx_pkts)
1563 return 0;
1564
1565 retry = 1;
1566 rc = 0;
1567
1568 spin_lock_bh(&priv->tx_lock);
1569 priv->tx_wait = &tx_wait;
1570 while (!rc) {
1571 int oldcount;
1572 unsigned long timeout;
1573
1574 oldcount = priv->pending_tx_pkts;
1575
1576 spin_unlock_bh(&priv->tx_lock);
1577 timeout = wait_for_completion_timeout(&tx_wait,
1578 msecs_to_jiffies(MWL8K_TX_WAIT_TIMEOUT_MS));
1579
1580 if (atomic_read(&priv->watchdog_event_pending)) {
1581 spin_lock_bh(&priv->tx_lock);
1582 priv->tx_wait = NULL;
1583 spin_unlock_bh(&priv->tx_lock);
1584 return 0;
1585 }
1586
1587 spin_lock_bh(&priv->tx_lock);
1588
1589 if (timeout || !priv->pending_tx_pkts) {
1590 WARN_ON(priv->pending_tx_pkts);
1591 if (retry)
1592 wiphy_notice(hw->wiphy, "tx rings drained\n");
1593 break;
1594 }
1595
1596 if (retry) {
1597 mwl8k_tx_start(priv);
1598 retry = 0;
1599 continue;
1600 }
1601
1602 if (priv->pending_tx_pkts < oldcount) {
1603 wiphy_notice(hw->wiphy,
1604 "waiting for tx rings to drain (%d -> %d pkts)\n",
1605 oldcount, priv->pending_tx_pkts);
1606 retry = 1;
1607 continue;
1608 }
1609
1610 priv->tx_wait = NULL;
1611
1612 wiphy_err(hw->wiphy, "tx rings stuck for %d ms\n",
1613 MWL8K_TX_WAIT_TIMEOUT_MS);
1614 mwl8k_dump_tx_rings(hw);
1615 priv->hw_restart_in_progress = true;
1616 ieee80211_queue_work(hw, &priv->fw_reload);
1617
1618 rc = -ETIMEDOUT;
1619 }
1620 priv->tx_wait = NULL;
1621 spin_unlock_bh(&priv->tx_lock);
1622
1623 return rc;
1624 }
1625
1626 #define MWL8K_TXD_SUCCESS(status) \
1627 ((status) & (MWL8K_TXD_STATUS_OK | \
1628 MWL8K_TXD_STATUS_OK_RETRY | \
1629 MWL8K_TXD_STATUS_OK_MORE_RETRY))
1630
mwl8k_tid_queue_mapping(u8 tid)1631 static int mwl8k_tid_queue_mapping(u8 tid)
1632 {
1633 BUG_ON(tid > 7);
1634
1635 switch (tid) {
1636 case 0:
1637 case 3:
1638 return IEEE80211_AC_BE;
1639 case 1:
1640 case 2:
1641 return IEEE80211_AC_BK;
1642 case 4:
1643 case 5:
1644 return IEEE80211_AC_VI;
1645 case 6:
1646 case 7:
1647 return IEEE80211_AC_VO;
1648 default:
1649 return -1;
1650 }
1651 }
1652
1653 /* The firmware will fill in the rate information
1654 * for each packet that gets queued in the hardware
1655 * and these macros will interpret that info.
1656 */
1657
1658 #define RI_FORMAT(a) (a & 0x0001)
1659 #define RI_RATE_ID_MCS(a) ((a & 0x01f8) >> 3)
1660
1661 static int
mwl8k_txq_reclaim(struct ieee80211_hw * hw,int index,int limit,int force)1662 mwl8k_txq_reclaim(struct ieee80211_hw *hw, int index, int limit, int force)
1663 {
1664 struct mwl8k_priv *priv = hw->priv;
1665 struct mwl8k_tx_queue *txq = priv->txq + index;
1666 int processed;
1667
1668 processed = 0;
1669 while (txq->len > 0 && limit--) {
1670 int tx;
1671 struct mwl8k_tx_desc *tx_desc;
1672 unsigned long addr;
1673 int size;
1674 struct sk_buff *skb;
1675 struct ieee80211_tx_info *info;
1676 u32 status;
1677 struct ieee80211_sta *sta;
1678 struct mwl8k_sta *sta_info = NULL;
1679 u16 rate_info;
1680 struct ieee80211_hdr *wh;
1681
1682 tx = txq->head;
1683 tx_desc = txq->txd + tx;
1684
1685 status = le32_to_cpu(tx_desc->status);
1686
1687 if (status & MWL8K_TXD_STATUS_FW_OWNED) {
1688 if (!force)
1689 break;
1690 tx_desc->status &=
1691 ~cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED);
1692 }
1693
1694 txq->head = (tx + 1) % MWL8K_TX_DESCS;
1695 BUG_ON(txq->len == 0);
1696 txq->len--;
1697 priv->pending_tx_pkts--;
1698
1699 addr = le32_to_cpu(tx_desc->pkt_phys_addr);
1700 size = le16_to_cpu(tx_desc->pkt_len);
1701 skb = txq->skb[tx];
1702 txq->skb[tx] = NULL;
1703
1704 BUG_ON(skb == NULL);
1705 pci_unmap_single(priv->pdev, addr, size, PCI_DMA_TODEVICE);
1706
1707 mwl8k_remove_dma_header(skb, tx_desc->qos_control);
1708
1709 wh = (struct ieee80211_hdr *) skb->data;
1710
1711 /* Mark descriptor as unused */
1712 tx_desc->pkt_phys_addr = 0;
1713 tx_desc->pkt_len = 0;
1714
1715 info = IEEE80211_SKB_CB(skb);
1716 if (ieee80211_is_data(wh->frame_control)) {
1717 rcu_read_lock();
1718 sta = ieee80211_find_sta_by_ifaddr(hw, wh->addr1,
1719 wh->addr2);
1720 if (sta) {
1721 sta_info = MWL8K_STA(sta);
1722 BUG_ON(sta_info == NULL);
1723 rate_info = le16_to_cpu(tx_desc->rate_info);
1724 /* If rate is < 6.5 Mpbs for an ht station
1725 * do not form an ampdu. If the station is a
1726 * legacy station (format = 0), do not form an
1727 * ampdu
1728 */
1729 if (RI_RATE_ID_MCS(rate_info) < 1 ||
1730 RI_FORMAT(rate_info) == 0) {
1731 sta_info->is_ampdu_allowed = false;
1732 } else {
1733 sta_info->is_ampdu_allowed = true;
1734 }
1735 }
1736 rcu_read_unlock();
1737 }
1738
1739 ieee80211_tx_info_clear_status(info);
1740
1741 /* Rate control is happening in the firmware.
1742 * Ensure no tx rate is being reported.
1743 */
1744 info->status.rates[0].idx = -1;
1745 info->status.rates[0].count = 1;
1746
1747 if (MWL8K_TXD_SUCCESS(status))
1748 info->flags |= IEEE80211_TX_STAT_ACK;
1749
1750 ieee80211_tx_status_irqsafe(hw, skb);
1751
1752 processed++;
1753 }
1754
1755 return processed;
1756 }
1757
1758 /* must be called only when the card's transmit is completely halted */
mwl8k_txq_deinit(struct ieee80211_hw * hw,int index)1759 static void mwl8k_txq_deinit(struct ieee80211_hw *hw, int index)
1760 {
1761 struct mwl8k_priv *priv = hw->priv;
1762 struct mwl8k_tx_queue *txq = priv->txq + index;
1763
1764 if (txq->txd == NULL)
1765 return;
1766
1767 mwl8k_txq_reclaim(hw, index, INT_MAX, 1);
1768
1769 kfree(txq->skb);
1770 txq->skb = NULL;
1771
1772 pci_free_consistent(priv->pdev,
1773 MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc),
1774 txq->txd, txq->txd_dma);
1775 txq->txd = NULL;
1776 }
1777
1778 /* caller must hold priv->stream_lock when calling the stream functions */
1779 static struct mwl8k_ampdu_stream *
mwl8k_add_stream(struct ieee80211_hw * hw,struct ieee80211_sta * sta,u8 tid)1780 mwl8k_add_stream(struct ieee80211_hw *hw, struct ieee80211_sta *sta, u8 tid)
1781 {
1782 struct mwl8k_ampdu_stream *stream;
1783 struct mwl8k_priv *priv = hw->priv;
1784 int i;
1785
1786 for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
1787 stream = &priv->ampdu[i];
1788 if (stream->state == AMPDU_NO_STREAM) {
1789 stream->sta = sta;
1790 stream->state = AMPDU_STREAM_NEW;
1791 stream->tid = tid;
1792 stream->idx = i;
1793 wiphy_debug(hw->wiphy, "Added a new stream for %pM %d",
1794 sta->addr, tid);
1795 return stream;
1796 }
1797 }
1798 return NULL;
1799 }
1800
1801 static int
mwl8k_start_stream(struct ieee80211_hw * hw,struct mwl8k_ampdu_stream * stream)1802 mwl8k_start_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream)
1803 {
1804 int ret;
1805
1806 /* if the stream has already been started, don't start it again */
1807 if (stream->state != AMPDU_STREAM_NEW)
1808 return 0;
1809 ret = ieee80211_start_tx_ba_session(stream->sta, stream->tid, 0);
1810 if (ret)
1811 wiphy_debug(hw->wiphy, "Failed to start stream for %pM %d: "
1812 "%d\n", stream->sta->addr, stream->tid, ret);
1813 else
1814 wiphy_debug(hw->wiphy, "Started stream for %pM %d\n",
1815 stream->sta->addr, stream->tid);
1816 return ret;
1817 }
1818
1819 static void
mwl8k_remove_stream(struct ieee80211_hw * hw,struct mwl8k_ampdu_stream * stream)1820 mwl8k_remove_stream(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream)
1821 {
1822 wiphy_debug(hw->wiphy, "Remove stream for %pM %d\n", stream->sta->addr,
1823 stream->tid);
1824 memset(stream, 0, sizeof(*stream));
1825 }
1826
1827 static struct mwl8k_ampdu_stream *
mwl8k_lookup_stream(struct ieee80211_hw * hw,u8 * addr,u8 tid)1828 mwl8k_lookup_stream(struct ieee80211_hw *hw, u8 *addr, u8 tid)
1829 {
1830 struct mwl8k_priv *priv = hw->priv;
1831 int i;
1832
1833 for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
1834 struct mwl8k_ampdu_stream *stream;
1835 stream = &priv->ampdu[i];
1836 if (stream->state == AMPDU_NO_STREAM)
1837 continue;
1838 if (!memcmp(stream->sta->addr, addr, ETH_ALEN) &&
1839 stream->tid == tid)
1840 return stream;
1841 }
1842 return NULL;
1843 }
1844
1845 #define MWL8K_AMPDU_PACKET_THRESHOLD 64
mwl8k_ampdu_allowed(struct ieee80211_sta * sta,u8 tid)1846 static inline bool mwl8k_ampdu_allowed(struct ieee80211_sta *sta, u8 tid)
1847 {
1848 struct mwl8k_sta *sta_info = MWL8K_STA(sta);
1849 struct tx_traffic_info *tx_stats;
1850
1851 BUG_ON(tid >= MWL8K_MAX_TID);
1852 tx_stats = &sta_info->tx_stats[tid];
1853
1854 return sta_info->is_ampdu_allowed &&
1855 tx_stats->pkts > MWL8K_AMPDU_PACKET_THRESHOLD;
1856 }
1857
mwl8k_tx_count_packet(struct ieee80211_sta * sta,u8 tid)1858 static inline void mwl8k_tx_count_packet(struct ieee80211_sta *sta, u8 tid)
1859 {
1860 struct mwl8k_sta *sta_info = MWL8K_STA(sta);
1861 struct tx_traffic_info *tx_stats;
1862
1863 BUG_ON(tid >= MWL8K_MAX_TID);
1864 tx_stats = &sta_info->tx_stats[tid];
1865
1866 if (tx_stats->start_time == 0)
1867 tx_stats->start_time = jiffies;
1868
1869 /* reset the packet count after each second elapses. If the number of
1870 * packets ever exceeds the ampdu_min_traffic threshold, we will allow
1871 * an ampdu stream to be started.
1872 */
1873 if (jiffies - tx_stats->start_time > HZ) {
1874 tx_stats->pkts = 0;
1875 tx_stats->start_time = 0;
1876 } else
1877 tx_stats->pkts++;
1878 }
1879
1880 /* The hardware ampdu queues start from 5.
1881 * txpriorities for ampdu queues are
1882 * 5 6 7 0 1 2 3 4 ie., queue 5 is highest
1883 * and queue 3 is lowest (queue 4 is reserved)
1884 */
1885 #define BA_QUEUE 5
1886
1887 static void
mwl8k_txq_xmit(struct ieee80211_hw * hw,int index,struct ieee80211_sta * sta,struct sk_buff * skb)1888 mwl8k_txq_xmit(struct ieee80211_hw *hw,
1889 int index,
1890 struct ieee80211_sta *sta,
1891 struct sk_buff *skb)
1892 {
1893 struct mwl8k_priv *priv = hw->priv;
1894 struct ieee80211_tx_info *tx_info;
1895 struct mwl8k_vif *mwl8k_vif;
1896 struct ieee80211_hdr *wh;
1897 struct mwl8k_tx_queue *txq;
1898 struct mwl8k_tx_desc *tx;
1899 dma_addr_t dma;
1900 u32 txstatus;
1901 u8 txdatarate;
1902 u16 qos;
1903 int txpriority;
1904 u8 tid = 0;
1905 struct mwl8k_ampdu_stream *stream = NULL;
1906 bool start_ba_session = false;
1907 bool mgmtframe = false;
1908 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
1909 bool eapol_frame = false;
1910
1911 wh = (struct ieee80211_hdr *)skb->data;
1912 if (ieee80211_is_data_qos(wh->frame_control))
1913 qos = le16_to_cpu(*((__le16 *)ieee80211_get_qos_ctl(wh)));
1914 else
1915 qos = 0;
1916
1917 if (skb->protocol == cpu_to_be16(ETH_P_PAE))
1918 eapol_frame = true;
1919
1920 if (ieee80211_is_mgmt(wh->frame_control))
1921 mgmtframe = true;
1922
1923 if (priv->ap_fw)
1924 mwl8k_encapsulate_tx_frame(priv, skb);
1925 else
1926 mwl8k_add_dma_header(priv, skb, 0, 0);
1927
1928 wh = &((struct mwl8k_dma_data *)skb->data)->wh;
1929
1930 tx_info = IEEE80211_SKB_CB(skb);
1931 mwl8k_vif = MWL8K_VIF(tx_info->control.vif);
1932
1933 if (tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1934 wh->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1935 wh->seq_ctrl |= cpu_to_le16(mwl8k_vif->seqno);
1936 mwl8k_vif->seqno += 0x10;
1937 }
1938
1939 /* Setup firmware control bit fields for each frame type. */
1940 txstatus = 0;
1941 txdatarate = 0;
1942 if (ieee80211_is_mgmt(wh->frame_control) ||
1943 ieee80211_is_ctl(wh->frame_control)) {
1944 txdatarate = 0;
1945 qos |= MWL8K_QOS_QLEN_UNSPEC | MWL8K_QOS_EOSP;
1946 } else if (ieee80211_is_data(wh->frame_control)) {
1947 txdatarate = 1;
1948 if (is_multicast_ether_addr(wh->addr1))
1949 txstatus |= MWL8K_TXD_STATUS_MULTICAST_TX;
1950
1951 qos &= ~MWL8K_QOS_ACK_POLICY_MASK;
1952 if (tx_info->flags & IEEE80211_TX_CTL_AMPDU)
1953 qos |= MWL8K_QOS_ACK_POLICY_BLOCKACK;
1954 else
1955 qos |= MWL8K_QOS_ACK_POLICY_NORMAL;
1956 }
1957
1958 /* Queue ADDBA request in the respective data queue. While setting up
1959 * the ampdu stream, mac80211 queues further packets for that
1960 * particular ra/tid pair. However, packets piled up in the hardware
1961 * for that ra/tid pair will still go out. ADDBA request and the
1962 * related data packets going out from different queues asynchronously
1963 * will cause a shift in the receiver window which might result in
1964 * ampdu packets getting dropped at the receiver after the stream has
1965 * been setup.
1966 */
1967 if (unlikely(ieee80211_is_action(wh->frame_control) &&
1968 mgmt->u.action.category == WLAN_CATEGORY_BACK &&
1969 mgmt->u.action.u.addba_req.action_code == WLAN_ACTION_ADDBA_REQ &&
1970 priv->ap_fw)) {
1971 u16 capab = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
1972 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
1973 index = mwl8k_tid_queue_mapping(tid);
1974 }
1975
1976 txpriority = index;
1977
1978 if (priv->ap_fw && sta && sta->ht_cap.ht_supported && !eapol_frame &&
1979 ieee80211_is_data_qos(wh->frame_control)) {
1980 tid = qos & 0xf;
1981 mwl8k_tx_count_packet(sta, tid);
1982 spin_lock(&priv->stream_lock);
1983 stream = mwl8k_lookup_stream(hw, sta->addr, tid);
1984 if (stream != NULL) {
1985 if (stream->state == AMPDU_STREAM_ACTIVE) {
1986 WARN_ON(!(qos & MWL8K_QOS_ACK_POLICY_BLOCKACK));
1987 txpriority = (BA_QUEUE + stream->idx) %
1988 TOTAL_HW_TX_QUEUES;
1989 if (stream->idx <= 1)
1990 index = stream->idx +
1991 MWL8K_TX_WMM_QUEUES;
1992
1993 } else if (stream->state == AMPDU_STREAM_NEW) {
1994 /* We get here if the driver sends us packets
1995 * after we've initiated a stream, but before
1996 * our ampdu_action routine has been called
1997 * with IEEE80211_AMPDU_TX_START to get the SSN
1998 * for the ADDBA request. So this packet can
1999 * go out with no risk of sequence number
2000 * mismatch. No special handling is required.
2001 */
2002 } else {
2003 /* Drop packets that would go out after the
2004 * ADDBA request was sent but before the ADDBA
2005 * response is received. If we don't do this,
2006 * the recipient would probably receive it
2007 * after the ADDBA request with SSN 0. This
2008 * will cause the recipient's BA receive window
2009 * to shift, which would cause the subsequent
2010 * packets in the BA stream to be discarded.
2011 * mac80211 queues our packets for us in this
2012 * case, so this is really just a safety check.
2013 */
2014 wiphy_warn(hw->wiphy,
2015 "Cannot send packet while ADDBA "
2016 "dialog is underway.\n");
2017 spin_unlock(&priv->stream_lock);
2018 dev_kfree_skb(skb);
2019 return;
2020 }
2021 } else {
2022 /* Defer calling mwl8k_start_stream so that the current
2023 * skb can go out before the ADDBA request. This
2024 * prevents sequence number mismatch at the recepient
2025 * as described above.
2026 */
2027 if (mwl8k_ampdu_allowed(sta, tid)) {
2028 stream = mwl8k_add_stream(hw, sta, tid);
2029 if (stream != NULL)
2030 start_ba_session = true;
2031 }
2032 }
2033 spin_unlock(&priv->stream_lock);
2034 } else {
2035 qos &= ~MWL8K_QOS_ACK_POLICY_MASK;
2036 qos |= MWL8K_QOS_ACK_POLICY_NORMAL;
2037 }
2038
2039 dma = pci_map_single(priv->pdev, skb->data,
2040 skb->len, PCI_DMA_TODEVICE);
2041
2042 if (pci_dma_mapping_error(priv->pdev, dma)) {
2043 wiphy_debug(hw->wiphy,
2044 "failed to dma map skb, dropping TX frame.\n");
2045 if (start_ba_session) {
2046 spin_lock(&priv->stream_lock);
2047 mwl8k_remove_stream(hw, stream);
2048 spin_unlock(&priv->stream_lock);
2049 }
2050 dev_kfree_skb(skb);
2051 return;
2052 }
2053
2054 spin_lock_bh(&priv->tx_lock);
2055
2056 txq = priv->txq + index;
2057
2058 /* Mgmt frames that go out frequently are probe
2059 * responses. Other mgmt frames got out relatively
2060 * infrequently. Hence reserve 2 buffers so that
2061 * other mgmt frames do not get dropped due to an
2062 * already queued probe response in one of the
2063 * reserved buffers.
2064 */
2065
2066 if (txq->len >= MWL8K_TX_DESCS - 2) {
2067 if (!mgmtframe || txq->len == MWL8K_TX_DESCS) {
2068 if (start_ba_session) {
2069 spin_lock(&priv->stream_lock);
2070 mwl8k_remove_stream(hw, stream);
2071 spin_unlock(&priv->stream_lock);
2072 }
2073 mwl8k_tx_start(priv);
2074 spin_unlock_bh(&priv->tx_lock);
2075 pci_unmap_single(priv->pdev, dma, skb->len,
2076 PCI_DMA_TODEVICE);
2077 dev_kfree_skb(skb);
2078 return;
2079 }
2080 }
2081
2082 BUG_ON(txq->skb[txq->tail] != NULL);
2083 txq->skb[txq->tail] = skb;
2084
2085 tx = txq->txd + txq->tail;
2086 tx->data_rate = txdatarate;
2087 tx->tx_priority = txpriority;
2088 tx->qos_control = cpu_to_le16(qos);
2089 tx->pkt_phys_addr = cpu_to_le32(dma);
2090 tx->pkt_len = cpu_to_le16(skb->len);
2091 tx->rate_info = 0;
2092 if (!priv->ap_fw && sta != NULL)
2093 tx->peer_id = MWL8K_STA(sta)->peer_id;
2094 else
2095 tx->peer_id = 0;
2096
2097 if (priv->ap_fw && ieee80211_is_data(wh->frame_control) && !eapol_frame)
2098 tx->timestamp = cpu_to_le32(ioread32(priv->regs +
2099 MWL8K_HW_TIMER_REGISTER));
2100 else
2101 tx->timestamp = 0;
2102
2103 wmb();
2104 tx->status = cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED | txstatus);
2105
2106 txq->len++;
2107 priv->pending_tx_pkts++;
2108
2109 txq->tail++;
2110 if (txq->tail == MWL8K_TX_DESCS)
2111 txq->tail = 0;
2112
2113 mwl8k_tx_start(priv);
2114
2115 spin_unlock_bh(&priv->tx_lock);
2116
2117 /* Initiate the ampdu session here */
2118 if (start_ba_session) {
2119 spin_lock(&priv->stream_lock);
2120 if (mwl8k_start_stream(hw, stream))
2121 mwl8k_remove_stream(hw, stream);
2122 spin_unlock(&priv->stream_lock);
2123 }
2124 }
2125
2126
2127 /*
2128 * Firmware access.
2129 *
2130 * We have the following requirements for issuing firmware commands:
2131 * - Some commands require that the packet transmit path is idle when
2132 * the command is issued. (For simplicity, we'll just quiesce the
2133 * transmit path for every command.)
2134 * - There are certain sequences of commands that need to be issued to
2135 * the hardware sequentially, with no other intervening commands.
2136 *
2137 * This leads to an implementation of a "firmware lock" as a mutex that
2138 * can be taken recursively, and which is taken by both the low-level
2139 * command submission function (mwl8k_post_cmd) as well as any users of
2140 * that function that require issuing of an atomic sequence of commands,
2141 * and quiesces the transmit path whenever it's taken.
2142 */
mwl8k_fw_lock(struct ieee80211_hw * hw)2143 static int mwl8k_fw_lock(struct ieee80211_hw *hw)
2144 {
2145 struct mwl8k_priv *priv = hw->priv;
2146
2147 if (priv->fw_mutex_owner != current) {
2148 int rc;
2149
2150 mutex_lock(&priv->fw_mutex);
2151 ieee80211_stop_queues(hw);
2152
2153 rc = mwl8k_tx_wait_empty(hw);
2154 if (rc) {
2155 if (!priv->hw_restart_in_progress)
2156 ieee80211_wake_queues(hw);
2157
2158 mutex_unlock(&priv->fw_mutex);
2159
2160 return rc;
2161 }
2162
2163 priv->fw_mutex_owner = current;
2164 }
2165
2166 priv->fw_mutex_depth++;
2167
2168 return 0;
2169 }
2170
mwl8k_fw_unlock(struct ieee80211_hw * hw)2171 static void mwl8k_fw_unlock(struct ieee80211_hw *hw)
2172 {
2173 struct mwl8k_priv *priv = hw->priv;
2174
2175 if (!--priv->fw_mutex_depth) {
2176 if (!priv->hw_restart_in_progress)
2177 ieee80211_wake_queues(hw);
2178
2179 priv->fw_mutex_owner = NULL;
2180 mutex_unlock(&priv->fw_mutex);
2181 }
2182 }
2183
2184 static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable,
2185 u32 bitmap);
2186
2187 /*
2188 * Command processing.
2189 */
2190
2191 /* Timeout firmware commands after 10s */
2192 #define MWL8K_CMD_TIMEOUT_MS 10000
2193
mwl8k_post_cmd(struct ieee80211_hw * hw,struct mwl8k_cmd_pkt * cmd)2194 static int mwl8k_post_cmd(struct ieee80211_hw *hw, struct mwl8k_cmd_pkt *cmd)
2195 {
2196 DECLARE_COMPLETION_ONSTACK(cmd_wait);
2197 struct mwl8k_priv *priv = hw->priv;
2198 void __iomem *regs = priv->regs;
2199 dma_addr_t dma_addr;
2200 unsigned int dma_size;
2201 int rc;
2202 unsigned long timeout = 0;
2203 u8 buf[32];
2204 u32 bitmap = 0;
2205
2206 wiphy_dbg(hw->wiphy, "Posting %s [%d]\n",
2207 mwl8k_cmd_name(cmd->code, buf, sizeof(buf)), cmd->macid);
2208
2209 /* Before posting firmware commands that could change the hardware
2210 * characteristics, make sure that all BSSes are stopped temporary.
2211 * Enable these stopped BSSes after completion of the commands
2212 */
2213
2214 rc = mwl8k_fw_lock(hw);
2215 if (rc)
2216 return rc;
2217
2218 if (priv->ap_fw && priv->running_bsses) {
2219 switch (le16_to_cpu(cmd->code)) {
2220 case MWL8K_CMD_SET_RF_CHANNEL:
2221 case MWL8K_CMD_RADIO_CONTROL:
2222 case MWL8K_CMD_RF_TX_POWER:
2223 case MWL8K_CMD_TX_POWER:
2224 case MWL8K_CMD_RF_ANTENNA:
2225 case MWL8K_CMD_RTS_THRESHOLD:
2226 case MWL8K_CMD_MIMO_CONFIG:
2227 bitmap = priv->running_bsses;
2228 mwl8k_enable_bsses(hw, false, bitmap);
2229 break;
2230 }
2231 }
2232
2233 cmd->result = (__force __le16) 0xffff;
2234 dma_size = le16_to_cpu(cmd->length);
2235 dma_addr = pci_map_single(priv->pdev, cmd, dma_size,
2236 PCI_DMA_BIDIRECTIONAL);
2237 if (pci_dma_mapping_error(priv->pdev, dma_addr))
2238 return -ENOMEM;
2239
2240 priv->hostcmd_wait = &cmd_wait;
2241 iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
2242 iowrite32(MWL8K_H2A_INT_DOORBELL,
2243 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
2244 iowrite32(MWL8K_H2A_INT_DUMMY,
2245 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
2246
2247 timeout = wait_for_completion_timeout(&cmd_wait,
2248 msecs_to_jiffies(MWL8K_CMD_TIMEOUT_MS));
2249
2250 priv->hostcmd_wait = NULL;
2251
2252
2253 pci_unmap_single(priv->pdev, dma_addr, dma_size,
2254 PCI_DMA_BIDIRECTIONAL);
2255
2256 if (!timeout) {
2257 wiphy_err(hw->wiphy, "Command %s timeout after %u ms\n",
2258 mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
2259 MWL8K_CMD_TIMEOUT_MS);
2260 rc = -ETIMEDOUT;
2261 } else {
2262 int ms;
2263
2264 ms = MWL8K_CMD_TIMEOUT_MS - jiffies_to_msecs(timeout);
2265
2266 rc = cmd->result ? -EINVAL : 0;
2267 if (rc)
2268 wiphy_err(hw->wiphy, "Command %s error 0x%x\n",
2269 mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
2270 le16_to_cpu(cmd->result));
2271 else if (ms > 2000)
2272 wiphy_notice(hw->wiphy, "Command %s took %d ms\n",
2273 mwl8k_cmd_name(cmd->code,
2274 buf, sizeof(buf)),
2275 ms);
2276 }
2277
2278 if (bitmap)
2279 mwl8k_enable_bsses(hw, true, bitmap);
2280
2281 mwl8k_fw_unlock(hw);
2282
2283 return rc;
2284 }
2285
mwl8k_post_pervif_cmd(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct mwl8k_cmd_pkt * cmd)2286 static int mwl8k_post_pervif_cmd(struct ieee80211_hw *hw,
2287 struct ieee80211_vif *vif,
2288 struct mwl8k_cmd_pkt *cmd)
2289 {
2290 if (vif != NULL)
2291 cmd->macid = MWL8K_VIF(vif)->macid;
2292 return mwl8k_post_cmd(hw, cmd);
2293 }
2294
2295 /*
2296 * Setup code shared between STA and AP firmware images.
2297 */
mwl8k_setup_2ghz_band(struct ieee80211_hw * hw)2298 static void mwl8k_setup_2ghz_band(struct ieee80211_hw *hw)
2299 {
2300 struct mwl8k_priv *priv = hw->priv;
2301
2302 BUILD_BUG_ON(sizeof(priv->channels_24) != sizeof(mwl8k_channels_24));
2303 memcpy(priv->channels_24, mwl8k_channels_24, sizeof(mwl8k_channels_24));
2304
2305 BUILD_BUG_ON(sizeof(priv->rates_24) != sizeof(mwl8k_rates_24));
2306 memcpy(priv->rates_24, mwl8k_rates_24, sizeof(mwl8k_rates_24));
2307
2308 priv->band_24.band = NL80211_BAND_2GHZ;
2309 priv->band_24.channels = priv->channels_24;
2310 priv->band_24.n_channels = ARRAY_SIZE(mwl8k_channels_24);
2311 priv->band_24.bitrates = priv->rates_24;
2312 priv->band_24.n_bitrates = ARRAY_SIZE(mwl8k_rates_24);
2313
2314 hw->wiphy->bands[NL80211_BAND_2GHZ] = &priv->band_24;
2315 }
2316
mwl8k_setup_5ghz_band(struct ieee80211_hw * hw)2317 static void mwl8k_setup_5ghz_band(struct ieee80211_hw *hw)
2318 {
2319 struct mwl8k_priv *priv = hw->priv;
2320
2321 BUILD_BUG_ON(sizeof(priv->channels_50) != sizeof(mwl8k_channels_50));
2322 memcpy(priv->channels_50, mwl8k_channels_50, sizeof(mwl8k_channels_50));
2323
2324 BUILD_BUG_ON(sizeof(priv->rates_50) != sizeof(mwl8k_rates_50));
2325 memcpy(priv->rates_50, mwl8k_rates_50, sizeof(mwl8k_rates_50));
2326
2327 priv->band_50.band = NL80211_BAND_5GHZ;
2328 priv->band_50.channels = priv->channels_50;
2329 priv->band_50.n_channels = ARRAY_SIZE(mwl8k_channels_50);
2330 priv->band_50.bitrates = priv->rates_50;
2331 priv->band_50.n_bitrates = ARRAY_SIZE(mwl8k_rates_50);
2332
2333 hw->wiphy->bands[NL80211_BAND_5GHZ] = &priv->band_50;
2334 }
2335
2336 /*
2337 * CMD_GET_HW_SPEC (STA version).
2338 */
2339 struct mwl8k_cmd_get_hw_spec_sta {
2340 struct mwl8k_cmd_pkt header;
2341 __u8 hw_rev;
2342 __u8 host_interface;
2343 __le16 num_mcaddrs;
2344 __u8 perm_addr[ETH_ALEN];
2345 __le16 region_code;
2346 __le32 fw_rev;
2347 __le32 ps_cookie;
2348 __le32 caps;
2349 __u8 mcs_bitmap[16];
2350 __le32 rx_queue_ptr;
2351 __le32 num_tx_queues;
2352 __le32 tx_queue_ptrs[MWL8K_TX_WMM_QUEUES];
2353 __le32 caps2;
2354 __le32 num_tx_desc_per_queue;
2355 __le32 total_rxd;
2356 } __packed;
2357
2358 #define MWL8K_CAP_MAX_AMSDU 0x20000000
2359 #define MWL8K_CAP_GREENFIELD 0x08000000
2360 #define MWL8K_CAP_AMPDU 0x04000000
2361 #define MWL8K_CAP_RX_STBC 0x01000000
2362 #define MWL8K_CAP_TX_STBC 0x00800000
2363 #define MWL8K_CAP_SHORTGI_40MHZ 0x00400000
2364 #define MWL8K_CAP_SHORTGI_20MHZ 0x00200000
2365 #define MWL8K_CAP_RX_ANTENNA_MASK 0x000e0000
2366 #define MWL8K_CAP_TX_ANTENNA_MASK 0x0001c000
2367 #define MWL8K_CAP_DELAY_BA 0x00003000
2368 #define MWL8K_CAP_MIMO 0x00000200
2369 #define MWL8K_CAP_40MHZ 0x00000100
2370 #define MWL8K_CAP_BAND_MASK 0x00000007
2371 #define MWL8K_CAP_5GHZ 0x00000004
2372 #define MWL8K_CAP_2GHZ4 0x00000001
2373
2374 static void
mwl8k_set_ht_caps(struct ieee80211_hw * hw,struct ieee80211_supported_band * band,u32 cap)2375 mwl8k_set_ht_caps(struct ieee80211_hw *hw,
2376 struct ieee80211_supported_band *band, u32 cap)
2377 {
2378 int rx_streams;
2379 int tx_streams;
2380
2381 band->ht_cap.ht_supported = 1;
2382
2383 if (cap & MWL8K_CAP_MAX_AMSDU)
2384 band->ht_cap.cap |= IEEE80211_HT_CAP_MAX_AMSDU;
2385 if (cap & MWL8K_CAP_GREENFIELD)
2386 band->ht_cap.cap |= IEEE80211_HT_CAP_GRN_FLD;
2387 if (cap & MWL8K_CAP_AMPDU) {
2388 ieee80211_hw_set(hw, AMPDU_AGGREGATION);
2389 band->ht_cap.ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
2390 band->ht_cap.ampdu_density = IEEE80211_HT_MPDU_DENSITY_NONE;
2391 }
2392 if (cap & MWL8K_CAP_RX_STBC)
2393 band->ht_cap.cap |= IEEE80211_HT_CAP_RX_STBC;
2394 if (cap & MWL8K_CAP_TX_STBC)
2395 band->ht_cap.cap |= IEEE80211_HT_CAP_TX_STBC;
2396 if (cap & MWL8K_CAP_SHORTGI_40MHZ)
2397 band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_40;
2398 if (cap & MWL8K_CAP_SHORTGI_20MHZ)
2399 band->ht_cap.cap |= IEEE80211_HT_CAP_SGI_20;
2400 if (cap & MWL8K_CAP_DELAY_BA)
2401 band->ht_cap.cap |= IEEE80211_HT_CAP_DELAY_BA;
2402 if (cap & MWL8K_CAP_40MHZ)
2403 band->ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
2404
2405 rx_streams = hweight32(cap & MWL8K_CAP_RX_ANTENNA_MASK);
2406 tx_streams = hweight32(cap & MWL8K_CAP_TX_ANTENNA_MASK);
2407
2408 band->ht_cap.mcs.rx_mask[0] = 0xff;
2409 if (rx_streams >= 2)
2410 band->ht_cap.mcs.rx_mask[1] = 0xff;
2411 if (rx_streams >= 3)
2412 band->ht_cap.mcs.rx_mask[2] = 0xff;
2413 band->ht_cap.mcs.rx_mask[4] = 0x01;
2414 band->ht_cap.mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
2415
2416 if (rx_streams != tx_streams) {
2417 band->ht_cap.mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
2418 band->ht_cap.mcs.tx_params |= (tx_streams - 1) <<
2419 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
2420 }
2421 }
2422
2423 static void
mwl8k_set_caps(struct ieee80211_hw * hw,u32 caps)2424 mwl8k_set_caps(struct ieee80211_hw *hw, u32 caps)
2425 {
2426 struct mwl8k_priv *priv = hw->priv;
2427
2428 if (priv->caps)
2429 return;
2430
2431 if ((caps & MWL8K_CAP_2GHZ4) || !(caps & MWL8K_CAP_BAND_MASK)) {
2432 mwl8k_setup_2ghz_band(hw);
2433 if (caps & MWL8K_CAP_MIMO)
2434 mwl8k_set_ht_caps(hw, &priv->band_24, caps);
2435 }
2436
2437 if (caps & MWL8K_CAP_5GHZ) {
2438 mwl8k_setup_5ghz_band(hw);
2439 if (caps & MWL8K_CAP_MIMO)
2440 mwl8k_set_ht_caps(hw, &priv->band_50, caps);
2441 }
2442
2443 priv->caps = caps;
2444 }
2445
mwl8k_cmd_get_hw_spec_sta(struct ieee80211_hw * hw)2446 static int mwl8k_cmd_get_hw_spec_sta(struct ieee80211_hw *hw)
2447 {
2448 struct mwl8k_priv *priv = hw->priv;
2449 struct mwl8k_cmd_get_hw_spec_sta *cmd;
2450 int rc;
2451 int i;
2452
2453 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2454 if (cmd == NULL)
2455 return -ENOMEM;
2456
2457 cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
2458 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2459
2460 memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
2461 cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2462 cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma);
2463 cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv));
2464 for (i = 0; i < mwl8k_tx_queues(priv); i++)
2465 cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[i].txd_dma);
2466 cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
2467 cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS);
2468
2469 rc = mwl8k_post_cmd(hw, &cmd->header);
2470
2471 if (!rc) {
2472 SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
2473 priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
2474 priv->fw_rev = le32_to_cpu(cmd->fw_rev);
2475 priv->hw_rev = cmd->hw_rev;
2476 mwl8k_set_caps(hw, le32_to_cpu(cmd->caps));
2477 priv->ap_macids_supported = 0x00000000;
2478 priv->sta_macids_supported = 0x00000001;
2479 }
2480
2481 kfree(cmd);
2482 return rc;
2483 }
2484
2485 /*
2486 * CMD_GET_HW_SPEC (AP version).
2487 */
2488 struct mwl8k_cmd_get_hw_spec_ap {
2489 struct mwl8k_cmd_pkt header;
2490 __u8 hw_rev;
2491 __u8 host_interface;
2492 __le16 num_wcb;
2493 __le16 num_mcaddrs;
2494 __u8 perm_addr[ETH_ALEN];
2495 __le16 region_code;
2496 __le16 num_antenna;
2497 __le32 fw_rev;
2498 __le32 wcbbase0;
2499 __le32 rxwrptr;
2500 __le32 rxrdptr;
2501 __le32 ps_cookie;
2502 __le32 wcbbase1;
2503 __le32 wcbbase2;
2504 __le32 wcbbase3;
2505 __le32 fw_api_version;
2506 __le32 caps;
2507 __le32 num_of_ampdu_queues;
2508 __le32 wcbbase_ampdu[MWL8K_MAX_AMPDU_QUEUES];
2509 } __packed;
2510
mwl8k_cmd_get_hw_spec_ap(struct ieee80211_hw * hw)2511 static int mwl8k_cmd_get_hw_spec_ap(struct ieee80211_hw *hw)
2512 {
2513 struct mwl8k_priv *priv = hw->priv;
2514 struct mwl8k_cmd_get_hw_spec_ap *cmd;
2515 int rc, i;
2516 u32 api_version;
2517
2518 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2519 if (cmd == NULL)
2520 return -ENOMEM;
2521
2522 cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
2523 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2524
2525 memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
2526 cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2527
2528 rc = mwl8k_post_cmd(hw, &cmd->header);
2529
2530 if (!rc) {
2531 int off;
2532
2533 api_version = le32_to_cpu(cmd->fw_api_version);
2534 if (priv->device_info->fw_api_ap != api_version) {
2535 printk(KERN_ERR "%s: Unsupported fw API version for %s."
2536 " Expected %d got %d.\n", MWL8K_NAME,
2537 priv->device_info->part_name,
2538 priv->device_info->fw_api_ap,
2539 api_version);
2540 rc = -EINVAL;
2541 goto done;
2542 }
2543 SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
2544 priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
2545 priv->fw_rev = le32_to_cpu(cmd->fw_rev);
2546 priv->hw_rev = cmd->hw_rev;
2547 mwl8k_set_caps(hw, le32_to_cpu(cmd->caps));
2548 priv->ap_macids_supported = 0x000000ff;
2549 priv->sta_macids_supported = 0x00000100;
2550 priv->num_ampdu_queues = le32_to_cpu(cmd->num_of_ampdu_queues);
2551 if (priv->num_ampdu_queues > MWL8K_MAX_AMPDU_QUEUES) {
2552 wiphy_warn(hw->wiphy, "fw reported %d ampdu queues"
2553 " but we only support %d.\n",
2554 priv->num_ampdu_queues,
2555 MWL8K_MAX_AMPDU_QUEUES);
2556 priv->num_ampdu_queues = MWL8K_MAX_AMPDU_QUEUES;
2557 }
2558 off = le32_to_cpu(cmd->rxwrptr) & 0xffff;
2559 iowrite32(priv->rxq[0].rxd_dma, priv->sram + off);
2560
2561 off = le32_to_cpu(cmd->rxrdptr) & 0xffff;
2562 iowrite32(priv->rxq[0].rxd_dma, priv->sram + off);
2563
2564 priv->txq_offset[0] = le32_to_cpu(cmd->wcbbase0) & 0xffff;
2565 priv->txq_offset[1] = le32_to_cpu(cmd->wcbbase1) & 0xffff;
2566 priv->txq_offset[2] = le32_to_cpu(cmd->wcbbase2) & 0xffff;
2567 priv->txq_offset[3] = le32_to_cpu(cmd->wcbbase3) & 0xffff;
2568
2569 for (i = 0; i < priv->num_ampdu_queues; i++)
2570 priv->txq_offset[i + MWL8K_TX_WMM_QUEUES] =
2571 le32_to_cpu(cmd->wcbbase_ampdu[i]) & 0xffff;
2572 }
2573
2574 done:
2575 kfree(cmd);
2576 return rc;
2577 }
2578
2579 /*
2580 * CMD_SET_HW_SPEC.
2581 */
2582 struct mwl8k_cmd_set_hw_spec {
2583 struct mwl8k_cmd_pkt header;
2584 __u8 hw_rev;
2585 __u8 host_interface;
2586 __le16 num_mcaddrs;
2587 __u8 perm_addr[ETH_ALEN];
2588 __le16 region_code;
2589 __le32 fw_rev;
2590 __le32 ps_cookie;
2591 __le32 caps;
2592 __le32 rx_queue_ptr;
2593 __le32 num_tx_queues;
2594 __le32 tx_queue_ptrs[MWL8K_MAX_TX_QUEUES];
2595 __le32 flags;
2596 __le32 num_tx_desc_per_queue;
2597 __le32 total_rxd;
2598 } __packed;
2599
2600 /* If enabled, MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY will cause
2601 * packets to expire 500 ms after the timestamp in the tx descriptor. That is,
2602 * the packets that are queued for more than 500ms, will be dropped in the
2603 * hardware. This helps minimizing the issues caused due to head-of-line
2604 * blocking where a slow client can hog the bandwidth and affect traffic to a
2605 * faster client.
2606 */
2607 #define MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY 0x00000400
2608 #define MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR 0x00000200
2609 #define MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT 0x00000080
2610 #define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP 0x00000020
2611 #define MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON 0x00000010
2612
mwl8k_cmd_set_hw_spec(struct ieee80211_hw * hw)2613 static int mwl8k_cmd_set_hw_spec(struct ieee80211_hw *hw)
2614 {
2615 struct mwl8k_priv *priv = hw->priv;
2616 struct mwl8k_cmd_set_hw_spec *cmd;
2617 int rc;
2618 int i;
2619
2620 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2621 if (cmd == NULL)
2622 return -ENOMEM;
2623
2624 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_HW_SPEC);
2625 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2626
2627 cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
2628 cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rxd_dma);
2629 cmd->num_tx_queues = cpu_to_le32(mwl8k_tx_queues(priv));
2630
2631 /*
2632 * Mac80211 stack has Q0 as highest priority and Q3 as lowest in
2633 * that order. Firmware has Q3 as highest priority and Q0 as lowest
2634 * in that order. Map Q3 of mac80211 to Q0 of firmware so that the
2635 * priority is interpreted the right way in firmware.
2636 */
2637 for (i = 0; i < mwl8k_tx_queues(priv); i++) {
2638 int j = mwl8k_tx_queues(priv) - 1 - i;
2639 cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[j].txd_dma);
2640 }
2641
2642 cmd->flags = cpu_to_le32(MWL8K_SET_HW_SPEC_FLAG_HOST_DECR_MGMT |
2643 MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_PROBERESP |
2644 MWL8K_SET_HW_SPEC_FLAG_HOSTFORM_BEACON |
2645 MWL8K_SET_HW_SPEC_FLAG_ENABLE_LIFE_TIME_EXPIRY |
2646 MWL8K_SET_HW_SPEC_FLAG_GENERATE_CCMP_HDR);
2647 cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
2648 cmd->total_rxd = cpu_to_le32(MWL8K_RX_DESCS);
2649
2650 rc = mwl8k_post_cmd(hw, &cmd->header);
2651 kfree(cmd);
2652
2653 return rc;
2654 }
2655
2656 /*
2657 * CMD_MAC_MULTICAST_ADR.
2658 */
2659 struct mwl8k_cmd_mac_multicast_adr {
2660 struct mwl8k_cmd_pkt header;
2661 __le16 action;
2662 __le16 numaddr;
2663 __u8 addr[0][ETH_ALEN];
2664 };
2665
2666 #define MWL8K_ENABLE_RX_DIRECTED 0x0001
2667 #define MWL8K_ENABLE_RX_MULTICAST 0x0002
2668 #define MWL8K_ENABLE_RX_ALL_MULTICAST 0x0004
2669 #define MWL8K_ENABLE_RX_BROADCAST 0x0008
2670
2671 static struct mwl8k_cmd_pkt *
__mwl8k_cmd_mac_multicast_adr(struct ieee80211_hw * hw,int allmulti,struct netdev_hw_addr_list * mc_list)2672 __mwl8k_cmd_mac_multicast_adr(struct ieee80211_hw *hw, int allmulti,
2673 struct netdev_hw_addr_list *mc_list)
2674 {
2675 struct mwl8k_priv *priv = hw->priv;
2676 struct mwl8k_cmd_mac_multicast_adr *cmd;
2677 int size;
2678 int mc_count = 0;
2679
2680 if (mc_list)
2681 mc_count = netdev_hw_addr_list_count(mc_list);
2682
2683 if (allmulti || mc_count > priv->num_mcaddrs) {
2684 allmulti = 1;
2685 mc_count = 0;
2686 }
2687
2688 size = sizeof(*cmd) + mc_count * ETH_ALEN;
2689
2690 cmd = kzalloc(size, GFP_ATOMIC);
2691 if (cmd == NULL)
2692 return NULL;
2693
2694 cmd->header.code = cpu_to_le16(MWL8K_CMD_MAC_MULTICAST_ADR);
2695 cmd->header.length = cpu_to_le16(size);
2696 cmd->action = cpu_to_le16(MWL8K_ENABLE_RX_DIRECTED |
2697 MWL8K_ENABLE_RX_BROADCAST);
2698
2699 if (allmulti) {
2700 cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_ALL_MULTICAST);
2701 } else if (mc_count) {
2702 struct netdev_hw_addr *ha;
2703 int i = 0;
2704
2705 cmd->action |= cpu_to_le16(MWL8K_ENABLE_RX_MULTICAST);
2706 cmd->numaddr = cpu_to_le16(mc_count);
2707 netdev_hw_addr_list_for_each(ha, mc_list) {
2708 memcpy(cmd->addr[i], ha->addr, ETH_ALEN);
2709 }
2710 }
2711
2712 return &cmd->header;
2713 }
2714
2715 /*
2716 * CMD_GET_STAT.
2717 */
2718 struct mwl8k_cmd_get_stat {
2719 struct mwl8k_cmd_pkt header;
2720 __le32 stats[64];
2721 } __packed;
2722
2723 #define MWL8K_STAT_ACK_FAILURE 9
2724 #define MWL8K_STAT_RTS_FAILURE 12
2725 #define MWL8K_STAT_FCS_ERROR 24
2726 #define MWL8K_STAT_RTS_SUCCESS 11
2727
mwl8k_cmd_get_stat(struct ieee80211_hw * hw,struct ieee80211_low_level_stats * stats)2728 static int mwl8k_cmd_get_stat(struct ieee80211_hw *hw,
2729 struct ieee80211_low_level_stats *stats)
2730 {
2731 struct mwl8k_cmd_get_stat *cmd;
2732 int rc;
2733
2734 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2735 if (cmd == NULL)
2736 return -ENOMEM;
2737
2738 cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_STAT);
2739 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2740
2741 rc = mwl8k_post_cmd(hw, &cmd->header);
2742 if (!rc) {
2743 stats->dot11ACKFailureCount =
2744 le32_to_cpu(cmd->stats[MWL8K_STAT_ACK_FAILURE]);
2745 stats->dot11RTSFailureCount =
2746 le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_FAILURE]);
2747 stats->dot11FCSErrorCount =
2748 le32_to_cpu(cmd->stats[MWL8K_STAT_FCS_ERROR]);
2749 stats->dot11RTSSuccessCount =
2750 le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_SUCCESS]);
2751 }
2752 kfree(cmd);
2753
2754 return rc;
2755 }
2756
2757 /*
2758 * CMD_RADIO_CONTROL.
2759 */
2760 struct mwl8k_cmd_radio_control {
2761 struct mwl8k_cmd_pkt header;
2762 __le16 action;
2763 __le16 control;
2764 __le16 radio_on;
2765 } __packed;
2766
2767 static int
mwl8k_cmd_radio_control(struct ieee80211_hw * hw,bool enable,bool force)2768 mwl8k_cmd_radio_control(struct ieee80211_hw *hw, bool enable, bool force)
2769 {
2770 struct mwl8k_priv *priv = hw->priv;
2771 struct mwl8k_cmd_radio_control *cmd;
2772 int rc;
2773
2774 if (enable == priv->radio_on && !force)
2775 return 0;
2776
2777 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2778 if (cmd == NULL)
2779 return -ENOMEM;
2780
2781 cmd->header.code = cpu_to_le16(MWL8K_CMD_RADIO_CONTROL);
2782 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2783 cmd->action = cpu_to_le16(MWL8K_CMD_SET);
2784 cmd->control = cpu_to_le16(priv->radio_short_preamble ? 3 : 1);
2785 cmd->radio_on = cpu_to_le16(enable ? 0x0001 : 0x0000);
2786
2787 rc = mwl8k_post_cmd(hw, &cmd->header);
2788 kfree(cmd);
2789
2790 if (!rc)
2791 priv->radio_on = enable;
2792
2793 return rc;
2794 }
2795
mwl8k_cmd_radio_disable(struct ieee80211_hw * hw)2796 static int mwl8k_cmd_radio_disable(struct ieee80211_hw *hw)
2797 {
2798 return mwl8k_cmd_radio_control(hw, 0, 0);
2799 }
2800
mwl8k_cmd_radio_enable(struct ieee80211_hw * hw)2801 static int mwl8k_cmd_radio_enable(struct ieee80211_hw *hw)
2802 {
2803 return mwl8k_cmd_radio_control(hw, 1, 0);
2804 }
2805
2806 static int
mwl8k_set_radio_preamble(struct ieee80211_hw * hw,bool short_preamble)2807 mwl8k_set_radio_preamble(struct ieee80211_hw *hw, bool short_preamble)
2808 {
2809 struct mwl8k_priv *priv = hw->priv;
2810
2811 priv->radio_short_preamble = short_preamble;
2812
2813 return mwl8k_cmd_radio_control(hw, 1, 1);
2814 }
2815
2816 /*
2817 * CMD_RF_TX_POWER.
2818 */
2819 #define MWL8K_RF_TX_POWER_LEVEL_TOTAL 8
2820
2821 struct mwl8k_cmd_rf_tx_power {
2822 struct mwl8k_cmd_pkt header;
2823 __le16 action;
2824 __le16 support_level;
2825 __le16 current_level;
2826 __le16 reserved;
2827 __le16 power_level_list[MWL8K_RF_TX_POWER_LEVEL_TOTAL];
2828 } __packed;
2829
mwl8k_cmd_rf_tx_power(struct ieee80211_hw * hw,int dBm)2830 static int mwl8k_cmd_rf_tx_power(struct ieee80211_hw *hw, int dBm)
2831 {
2832 struct mwl8k_cmd_rf_tx_power *cmd;
2833 int rc;
2834
2835 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2836 if (cmd == NULL)
2837 return -ENOMEM;
2838
2839 cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_TX_POWER);
2840 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2841 cmd->action = cpu_to_le16(MWL8K_CMD_SET);
2842 cmd->support_level = cpu_to_le16(dBm);
2843
2844 rc = mwl8k_post_cmd(hw, &cmd->header);
2845 kfree(cmd);
2846
2847 return rc;
2848 }
2849
2850 /*
2851 * CMD_TX_POWER.
2852 */
2853 #define MWL8K_TX_POWER_LEVEL_TOTAL 12
2854
2855 struct mwl8k_cmd_tx_power {
2856 struct mwl8k_cmd_pkt header;
2857 __le16 action;
2858 __le16 band;
2859 __le16 channel;
2860 __le16 bw;
2861 __le16 sub_ch;
2862 __le16 power_level_list[MWL8K_TX_POWER_LEVEL_TOTAL];
2863 } __packed;
2864
mwl8k_cmd_tx_power(struct ieee80211_hw * hw,struct ieee80211_conf * conf,unsigned short pwr)2865 static int mwl8k_cmd_tx_power(struct ieee80211_hw *hw,
2866 struct ieee80211_conf *conf,
2867 unsigned short pwr)
2868 {
2869 struct ieee80211_channel *channel = conf->chandef.chan;
2870 enum nl80211_channel_type channel_type =
2871 cfg80211_get_chandef_type(&conf->chandef);
2872 struct mwl8k_cmd_tx_power *cmd;
2873 int rc;
2874 int i;
2875
2876 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2877 if (cmd == NULL)
2878 return -ENOMEM;
2879
2880 cmd->header.code = cpu_to_le16(MWL8K_CMD_TX_POWER);
2881 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2882 cmd->action = cpu_to_le16(MWL8K_CMD_SET_LIST);
2883
2884 if (channel->band == NL80211_BAND_2GHZ)
2885 cmd->band = cpu_to_le16(0x1);
2886 else if (channel->band == NL80211_BAND_5GHZ)
2887 cmd->band = cpu_to_le16(0x4);
2888
2889 cmd->channel = cpu_to_le16(channel->hw_value);
2890
2891 if (channel_type == NL80211_CHAN_NO_HT ||
2892 channel_type == NL80211_CHAN_HT20) {
2893 cmd->bw = cpu_to_le16(0x2);
2894 } else {
2895 cmd->bw = cpu_to_le16(0x4);
2896 if (channel_type == NL80211_CHAN_HT40MINUS)
2897 cmd->sub_ch = cpu_to_le16(0x3);
2898 else if (channel_type == NL80211_CHAN_HT40PLUS)
2899 cmd->sub_ch = cpu_to_le16(0x1);
2900 }
2901
2902 for (i = 0; i < MWL8K_TX_POWER_LEVEL_TOTAL; i++)
2903 cmd->power_level_list[i] = cpu_to_le16(pwr);
2904
2905 rc = mwl8k_post_cmd(hw, &cmd->header);
2906 kfree(cmd);
2907
2908 return rc;
2909 }
2910
2911 /*
2912 * CMD_RF_ANTENNA.
2913 */
2914 struct mwl8k_cmd_rf_antenna {
2915 struct mwl8k_cmd_pkt header;
2916 __le16 antenna;
2917 __le16 mode;
2918 } __packed;
2919
2920 #define MWL8K_RF_ANTENNA_RX 1
2921 #define MWL8K_RF_ANTENNA_TX 2
2922
2923 static int
mwl8k_cmd_rf_antenna(struct ieee80211_hw * hw,int antenna,int mask)2924 mwl8k_cmd_rf_antenna(struct ieee80211_hw *hw, int antenna, int mask)
2925 {
2926 struct mwl8k_cmd_rf_antenna *cmd;
2927 int rc;
2928
2929 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2930 if (cmd == NULL)
2931 return -ENOMEM;
2932
2933 cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_ANTENNA);
2934 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2935 cmd->antenna = cpu_to_le16(antenna);
2936 cmd->mode = cpu_to_le16(mask);
2937
2938 rc = mwl8k_post_cmd(hw, &cmd->header);
2939 kfree(cmd);
2940
2941 return rc;
2942 }
2943
2944 /*
2945 * CMD_SET_BEACON.
2946 */
2947 struct mwl8k_cmd_set_beacon {
2948 struct mwl8k_cmd_pkt header;
2949 __le16 beacon_len;
2950 __u8 beacon[0];
2951 };
2952
mwl8k_cmd_set_beacon(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u8 * beacon,int len)2953 static int mwl8k_cmd_set_beacon(struct ieee80211_hw *hw,
2954 struct ieee80211_vif *vif, u8 *beacon, int len)
2955 {
2956 struct mwl8k_cmd_set_beacon *cmd;
2957 int rc;
2958
2959 cmd = kzalloc(sizeof(*cmd) + len, GFP_KERNEL);
2960 if (cmd == NULL)
2961 return -ENOMEM;
2962
2963 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_BEACON);
2964 cmd->header.length = cpu_to_le16(sizeof(*cmd) + len);
2965 cmd->beacon_len = cpu_to_le16(len);
2966 memcpy(cmd->beacon, beacon, len);
2967
2968 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
2969 kfree(cmd);
2970
2971 return rc;
2972 }
2973
2974 /*
2975 * CMD_SET_PRE_SCAN.
2976 */
2977 struct mwl8k_cmd_set_pre_scan {
2978 struct mwl8k_cmd_pkt header;
2979 } __packed;
2980
mwl8k_cmd_set_pre_scan(struct ieee80211_hw * hw)2981 static int mwl8k_cmd_set_pre_scan(struct ieee80211_hw *hw)
2982 {
2983 struct mwl8k_cmd_set_pre_scan *cmd;
2984 int rc;
2985
2986 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2987 if (cmd == NULL)
2988 return -ENOMEM;
2989
2990 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_PRE_SCAN);
2991 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2992
2993 rc = mwl8k_post_cmd(hw, &cmd->header);
2994 kfree(cmd);
2995
2996 return rc;
2997 }
2998
2999 /*
3000 * CMD_BBP_REG_ACCESS.
3001 */
3002 struct mwl8k_cmd_bbp_reg_access {
3003 struct mwl8k_cmd_pkt header;
3004 __le16 action;
3005 __le16 offset;
3006 u8 value;
3007 u8 rsrv[3];
3008 } __packed;
3009
3010 static int
mwl8k_cmd_bbp_reg_access(struct ieee80211_hw * hw,u16 action,u16 offset,u8 * value)3011 mwl8k_cmd_bbp_reg_access(struct ieee80211_hw *hw,
3012 u16 action,
3013 u16 offset,
3014 u8 *value)
3015 {
3016 struct mwl8k_cmd_bbp_reg_access *cmd;
3017 int rc;
3018
3019 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3020 if (cmd == NULL)
3021 return -ENOMEM;
3022
3023 cmd->header.code = cpu_to_le16(MWL8K_CMD_BBP_REG_ACCESS);
3024 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3025 cmd->action = cpu_to_le16(action);
3026 cmd->offset = cpu_to_le16(offset);
3027
3028 rc = mwl8k_post_cmd(hw, &cmd->header);
3029
3030 if (!rc)
3031 *value = cmd->value;
3032 else
3033 *value = 0;
3034
3035 kfree(cmd);
3036
3037 return rc;
3038 }
3039
3040 /*
3041 * CMD_SET_POST_SCAN.
3042 */
3043 struct mwl8k_cmd_set_post_scan {
3044 struct mwl8k_cmd_pkt header;
3045 __le32 isibss;
3046 __u8 bssid[ETH_ALEN];
3047 } __packed;
3048
3049 static int
mwl8k_cmd_set_post_scan(struct ieee80211_hw * hw,const __u8 * mac)3050 mwl8k_cmd_set_post_scan(struct ieee80211_hw *hw, const __u8 *mac)
3051 {
3052 struct mwl8k_cmd_set_post_scan *cmd;
3053 int rc;
3054
3055 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3056 if (cmd == NULL)
3057 return -ENOMEM;
3058
3059 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_POST_SCAN);
3060 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3061 cmd->isibss = 0;
3062 memcpy(cmd->bssid, mac, ETH_ALEN);
3063
3064 rc = mwl8k_post_cmd(hw, &cmd->header);
3065 kfree(cmd);
3066
3067 return rc;
3068 }
3069
freq_to_idx(struct mwl8k_priv * priv,int freq)3070 static int freq_to_idx(struct mwl8k_priv *priv, int freq)
3071 {
3072 struct ieee80211_supported_band *sband;
3073 int band, ch, idx = 0;
3074
3075 for (band = NL80211_BAND_2GHZ; band < NUM_NL80211_BANDS; band++) {
3076 sband = priv->hw->wiphy->bands[band];
3077 if (!sband)
3078 continue;
3079
3080 for (ch = 0; ch < sband->n_channels; ch++, idx++)
3081 if (sband->channels[ch].center_freq == freq)
3082 goto exit;
3083 }
3084
3085 exit:
3086 return idx;
3087 }
3088
mwl8k_update_survey(struct mwl8k_priv * priv,struct ieee80211_channel * channel)3089 static void mwl8k_update_survey(struct mwl8k_priv *priv,
3090 struct ieee80211_channel *channel)
3091 {
3092 u32 cca_cnt, rx_rdy;
3093 s8 nf = 0, idx;
3094 struct survey_info *survey;
3095
3096 idx = freq_to_idx(priv, priv->acs_chan->center_freq);
3097 if (idx >= MWL8K_NUM_CHANS) {
3098 wiphy_err(priv->hw->wiphy, "Failed to update survey\n");
3099 return;
3100 }
3101
3102 survey = &priv->survey[idx];
3103
3104 cca_cnt = ioread32(priv->regs + NOK_CCA_CNT_REG);
3105 cca_cnt /= 1000; /* uSecs to mSecs */
3106 survey->time_busy = (u64) cca_cnt;
3107
3108 rx_rdy = ioread32(priv->regs + BBU_RXRDY_CNT_REG);
3109 rx_rdy /= 1000; /* uSecs to mSecs */
3110 survey->time_rx = (u64) rx_rdy;
3111
3112 priv->channel_time = jiffies - priv->channel_time;
3113 survey->time = jiffies_to_msecs(priv->channel_time);
3114
3115 survey->channel = channel;
3116
3117 mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &nf);
3118
3119 /* Make sure sign is negative else ACS at hostapd fails */
3120 survey->noise = nf * -1;
3121
3122 survey->filled = SURVEY_INFO_NOISE_DBM |
3123 SURVEY_INFO_TIME |
3124 SURVEY_INFO_TIME_BUSY |
3125 SURVEY_INFO_TIME_RX;
3126 }
3127
3128 /*
3129 * CMD_SET_RF_CHANNEL.
3130 */
3131 struct mwl8k_cmd_set_rf_channel {
3132 struct mwl8k_cmd_pkt header;
3133 __le16 action;
3134 __u8 current_channel;
3135 __le32 channel_flags;
3136 } __packed;
3137
mwl8k_cmd_set_rf_channel(struct ieee80211_hw * hw,struct ieee80211_conf * conf)3138 static int mwl8k_cmd_set_rf_channel(struct ieee80211_hw *hw,
3139 struct ieee80211_conf *conf)
3140 {
3141 struct ieee80211_channel *channel = conf->chandef.chan;
3142 enum nl80211_channel_type channel_type =
3143 cfg80211_get_chandef_type(&conf->chandef);
3144 struct mwl8k_cmd_set_rf_channel *cmd;
3145 struct mwl8k_priv *priv = hw->priv;
3146 int rc;
3147
3148 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3149 if (cmd == NULL)
3150 return -ENOMEM;
3151
3152 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RF_CHANNEL);
3153 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3154 cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3155 cmd->current_channel = channel->hw_value;
3156
3157 if (channel->band == NL80211_BAND_2GHZ)
3158 cmd->channel_flags |= cpu_to_le32(0x00000001);
3159 else if (channel->band == NL80211_BAND_5GHZ)
3160 cmd->channel_flags |= cpu_to_le32(0x00000004);
3161
3162 if (!priv->sw_scan_start) {
3163 if (channel_type == NL80211_CHAN_NO_HT ||
3164 channel_type == NL80211_CHAN_HT20)
3165 cmd->channel_flags |= cpu_to_le32(0x00000080);
3166 else if (channel_type == NL80211_CHAN_HT40MINUS)
3167 cmd->channel_flags |= cpu_to_le32(0x000001900);
3168 else if (channel_type == NL80211_CHAN_HT40PLUS)
3169 cmd->channel_flags |= cpu_to_le32(0x000000900);
3170 } else {
3171 cmd->channel_flags |= cpu_to_le32(0x00000080);
3172 }
3173
3174 if (priv->sw_scan_start) {
3175 /* Store current channel stats
3176 * before switching to newer one.
3177 * This will be processed only for AP fw.
3178 */
3179 if (priv->channel_time != 0)
3180 mwl8k_update_survey(priv, priv->acs_chan);
3181
3182 priv->channel_time = jiffies;
3183 priv->acs_chan = channel;
3184 }
3185
3186 rc = mwl8k_post_cmd(hw, &cmd->header);
3187 kfree(cmd);
3188
3189 return rc;
3190 }
3191
3192 /*
3193 * CMD_SET_AID.
3194 */
3195 #define MWL8K_FRAME_PROT_DISABLED 0x00
3196 #define MWL8K_FRAME_PROT_11G 0x07
3197 #define MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY 0x02
3198 #define MWL8K_FRAME_PROT_11N_HT_ALL 0x06
3199
3200 struct mwl8k_cmd_update_set_aid {
3201 struct mwl8k_cmd_pkt header;
3202 __le16 aid;
3203
3204 /* AP's MAC address (BSSID) */
3205 __u8 bssid[ETH_ALEN];
3206 __le16 protection_mode;
3207 __u8 supp_rates[14];
3208 } __packed;
3209
legacy_rate_mask_to_array(u8 * rates,u32 mask)3210 static void legacy_rate_mask_to_array(u8 *rates, u32 mask)
3211 {
3212 int i;
3213 int j;
3214
3215 /*
3216 * Clear nonstandard rate 4.
3217 */
3218 mask &= 0x1fef;
3219
3220 for (i = 0, j = 0; i < 13; i++) {
3221 if (mask & (1 << i))
3222 rates[j++] = mwl8k_rates_24[i].hw_value;
3223 }
3224 }
3225
3226 static int
mwl8k_cmd_set_aid(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u32 legacy_rate_mask)3227 mwl8k_cmd_set_aid(struct ieee80211_hw *hw,
3228 struct ieee80211_vif *vif, u32 legacy_rate_mask)
3229 {
3230 struct mwl8k_cmd_update_set_aid *cmd;
3231 u16 prot_mode;
3232 int rc;
3233
3234 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3235 if (cmd == NULL)
3236 return -ENOMEM;
3237
3238 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_AID);
3239 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3240 cmd->aid = cpu_to_le16(vif->bss_conf.aid);
3241 memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
3242
3243 if (vif->bss_conf.use_cts_prot) {
3244 prot_mode = MWL8K_FRAME_PROT_11G;
3245 } else {
3246 switch (vif->bss_conf.ht_operation_mode &
3247 IEEE80211_HT_OP_MODE_PROTECTION) {
3248 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
3249 prot_mode = MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY;
3250 break;
3251 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
3252 prot_mode = MWL8K_FRAME_PROT_11N_HT_ALL;
3253 break;
3254 default:
3255 prot_mode = MWL8K_FRAME_PROT_DISABLED;
3256 break;
3257 }
3258 }
3259 cmd->protection_mode = cpu_to_le16(prot_mode);
3260
3261 legacy_rate_mask_to_array(cmd->supp_rates, legacy_rate_mask);
3262
3263 rc = mwl8k_post_cmd(hw, &cmd->header);
3264 kfree(cmd);
3265
3266 return rc;
3267 }
3268
3269 /*
3270 * CMD_SET_RATE.
3271 */
3272 struct mwl8k_cmd_set_rate {
3273 struct mwl8k_cmd_pkt header;
3274 __u8 legacy_rates[14];
3275
3276 /* Bitmap for supported MCS codes. */
3277 __u8 mcs_set[16];
3278 __u8 reserved[16];
3279 } __packed;
3280
3281 static int
mwl8k_cmd_set_rate(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u32 legacy_rate_mask,u8 * mcs_rates)3282 mwl8k_cmd_set_rate(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
3283 u32 legacy_rate_mask, u8 *mcs_rates)
3284 {
3285 struct mwl8k_cmd_set_rate *cmd;
3286 int rc;
3287
3288 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3289 if (cmd == NULL)
3290 return -ENOMEM;
3291
3292 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATE);
3293 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3294 legacy_rate_mask_to_array(cmd->legacy_rates, legacy_rate_mask);
3295 memcpy(cmd->mcs_set, mcs_rates, 16);
3296
3297 rc = mwl8k_post_cmd(hw, &cmd->header);
3298 kfree(cmd);
3299
3300 return rc;
3301 }
3302
3303 /*
3304 * CMD_FINALIZE_JOIN.
3305 */
3306 #define MWL8K_FJ_BEACON_MAXLEN 128
3307
3308 struct mwl8k_cmd_finalize_join {
3309 struct mwl8k_cmd_pkt header;
3310 __le32 sleep_interval; /* Number of beacon periods to sleep */
3311 __u8 beacon_data[MWL8K_FJ_BEACON_MAXLEN];
3312 } __packed;
3313
mwl8k_cmd_finalize_join(struct ieee80211_hw * hw,void * frame,int framelen,int dtim)3314 static int mwl8k_cmd_finalize_join(struct ieee80211_hw *hw, void *frame,
3315 int framelen, int dtim)
3316 {
3317 struct mwl8k_cmd_finalize_join *cmd;
3318 struct ieee80211_mgmt *payload = frame;
3319 int payload_len;
3320 int rc;
3321
3322 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3323 if (cmd == NULL)
3324 return -ENOMEM;
3325
3326 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_FINALIZE_JOIN);
3327 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3328 cmd->sleep_interval = cpu_to_le32(dtim ? dtim : 1);
3329
3330 payload_len = framelen - ieee80211_hdrlen(payload->frame_control);
3331 if (payload_len < 0)
3332 payload_len = 0;
3333 else if (payload_len > MWL8K_FJ_BEACON_MAXLEN)
3334 payload_len = MWL8K_FJ_BEACON_MAXLEN;
3335
3336 memcpy(cmd->beacon_data, &payload->u.beacon, payload_len);
3337
3338 rc = mwl8k_post_cmd(hw, &cmd->header);
3339 kfree(cmd);
3340
3341 return rc;
3342 }
3343
3344 /*
3345 * CMD_SET_RTS_THRESHOLD.
3346 */
3347 struct mwl8k_cmd_set_rts_threshold {
3348 struct mwl8k_cmd_pkt header;
3349 __le16 action;
3350 __le16 threshold;
3351 } __packed;
3352
3353 static int
mwl8k_cmd_set_rts_threshold(struct ieee80211_hw * hw,int rts_thresh)3354 mwl8k_cmd_set_rts_threshold(struct ieee80211_hw *hw, int rts_thresh)
3355 {
3356 struct mwl8k_cmd_set_rts_threshold *cmd;
3357 int rc;
3358
3359 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3360 if (cmd == NULL)
3361 return -ENOMEM;
3362
3363 cmd->header.code = cpu_to_le16(MWL8K_CMD_RTS_THRESHOLD);
3364 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3365 cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3366 cmd->threshold = cpu_to_le16(rts_thresh);
3367
3368 rc = mwl8k_post_cmd(hw, &cmd->header);
3369 kfree(cmd);
3370
3371 return rc;
3372 }
3373
3374 /*
3375 * CMD_SET_SLOT.
3376 */
3377 struct mwl8k_cmd_set_slot {
3378 struct mwl8k_cmd_pkt header;
3379 __le16 action;
3380 __u8 short_slot;
3381 } __packed;
3382
mwl8k_cmd_set_slot(struct ieee80211_hw * hw,bool short_slot_time)3383 static int mwl8k_cmd_set_slot(struct ieee80211_hw *hw, bool short_slot_time)
3384 {
3385 struct mwl8k_cmd_set_slot *cmd;
3386 int rc;
3387
3388 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3389 if (cmd == NULL)
3390 return -ENOMEM;
3391
3392 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_SLOT);
3393 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3394 cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3395 cmd->short_slot = short_slot_time;
3396
3397 rc = mwl8k_post_cmd(hw, &cmd->header);
3398 kfree(cmd);
3399
3400 return rc;
3401 }
3402
3403 /*
3404 * CMD_SET_EDCA_PARAMS.
3405 */
3406 struct mwl8k_cmd_set_edca_params {
3407 struct mwl8k_cmd_pkt header;
3408
3409 /* See MWL8K_SET_EDCA_XXX below */
3410 __le16 action;
3411
3412 /* TX opportunity in units of 32 us */
3413 __le16 txop;
3414
3415 union {
3416 struct {
3417 /* Log exponent of max contention period: 0...15 */
3418 __le32 log_cw_max;
3419
3420 /* Log exponent of min contention period: 0...15 */
3421 __le32 log_cw_min;
3422
3423 /* Adaptive interframe spacing in units of 32us */
3424 __u8 aifs;
3425
3426 /* TX queue to configure */
3427 __u8 txq;
3428 } ap;
3429 struct {
3430 /* Log exponent of max contention period: 0...15 */
3431 __u8 log_cw_max;
3432
3433 /* Log exponent of min contention period: 0...15 */
3434 __u8 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 } sta;
3442 };
3443 } __packed;
3444
3445 #define MWL8K_SET_EDCA_CW 0x01
3446 #define MWL8K_SET_EDCA_TXOP 0x02
3447 #define MWL8K_SET_EDCA_AIFS 0x04
3448
3449 #define MWL8K_SET_EDCA_ALL (MWL8K_SET_EDCA_CW | \
3450 MWL8K_SET_EDCA_TXOP | \
3451 MWL8K_SET_EDCA_AIFS)
3452
3453 static int
mwl8k_cmd_set_edca_params(struct ieee80211_hw * hw,__u8 qnum,__u16 cw_min,__u16 cw_max,__u8 aifs,__u16 txop)3454 mwl8k_cmd_set_edca_params(struct ieee80211_hw *hw, __u8 qnum,
3455 __u16 cw_min, __u16 cw_max,
3456 __u8 aifs, __u16 txop)
3457 {
3458 struct mwl8k_priv *priv = hw->priv;
3459 struct mwl8k_cmd_set_edca_params *cmd;
3460 int rc;
3461
3462 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3463 if (cmd == NULL)
3464 return -ENOMEM;
3465
3466 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_EDCA_PARAMS);
3467 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3468 cmd->action = cpu_to_le16(MWL8K_SET_EDCA_ALL);
3469 cmd->txop = cpu_to_le16(txop);
3470 if (priv->ap_fw) {
3471 cmd->ap.log_cw_max = cpu_to_le32(ilog2(cw_max + 1));
3472 cmd->ap.log_cw_min = cpu_to_le32(ilog2(cw_min + 1));
3473 cmd->ap.aifs = aifs;
3474 cmd->ap.txq = qnum;
3475 } else {
3476 cmd->sta.log_cw_max = (u8)ilog2(cw_max + 1);
3477 cmd->sta.log_cw_min = (u8)ilog2(cw_min + 1);
3478 cmd->sta.aifs = aifs;
3479 cmd->sta.txq = qnum;
3480 }
3481
3482 rc = mwl8k_post_cmd(hw, &cmd->header);
3483 kfree(cmd);
3484
3485 return rc;
3486 }
3487
3488 /*
3489 * CMD_SET_WMM_MODE.
3490 */
3491 struct mwl8k_cmd_set_wmm_mode {
3492 struct mwl8k_cmd_pkt header;
3493 __le16 action;
3494 } __packed;
3495
mwl8k_cmd_set_wmm_mode(struct ieee80211_hw * hw,bool enable)3496 static int mwl8k_cmd_set_wmm_mode(struct ieee80211_hw *hw, bool enable)
3497 {
3498 struct mwl8k_priv *priv = hw->priv;
3499 struct mwl8k_cmd_set_wmm_mode *cmd;
3500 int rc;
3501
3502 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3503 if (cmd == NULL)
3504 return -ENOMEM;
3505
3506 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_WMM_MODE);
3507 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3508 cmd->action = cpu_to_le16(!!enable);
3509
3510 rc = mwl8k_post_cmd(hw, &cmd->header);
3511 kfree(cmd);
3512
3513 if (!rc)
3514 priv->wmm_enabled = enable;
3515
3516 return rc;
3517 }
3518
3519 /*
3520 * CMD_MIMO_CONFIG.
3521 */
3522 struct mwl8k_cmd_mimo_config {
3523 struct mwl8k_cmd_pkt header;
3524 __le32 action;
3525 __u8 rx_antenna_map;
3526 __u8 tx_antenna_map;
3527 } __packed;
3528
mwl8k_cmd_mimo_config(struct ieee80211_hw * hw,__u8 rx,__u8 tx)3529 static int mwl8k_cmd_mimo_config(struct ieee80211_hw *hw, __u8 rx, __u8 tx)
3530 {
3531 struct mwl8k_cmd_mimo_config *cmd;
3532 int rc;
3533
3534 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3535 if (cmd == NULL)
3536 return -ENOMEM;
3537
3538 cmd->header.code = cpu_to_le16(MWL8K_CMD_MIMO_CONFIG);
3539 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3540 cmd->action = cpu_to_le32((u32)MWL8K_CMD_SET);
3541 cmd->rx_antenna_map = rx;
3542 cmd->tx_antenna_map = tx;
3543
3544 rc = mwl8k_post_cmd(hw, &cmd->header);
3545 kfree(cmd);
3546
3547 return rc;
3548 }
3549
3550 /*
3551 * CMD_USE_FIXED_RATE (STA version).
3552 */
3553 struct mwl8k_cmd_use_fixed_rate_sta {
3554 struct mwl8k_cmd_pkt header;
3555 __le32 action;
3556 __le32 allow_rate_drop;
3557 __le32 num_rates;
3558 struct {
3559 __le32 is_ht_rate;
3560 __le32 enable_retry;
3561 __le32 rate;
3562 __le32 retry_count;
3563 } rate_entry[8];
3564 __le32 rate_type;
3565 __le32 reserved1;
3566 __le32 reserved2;
3567 } __packed;
3568
3569 #define MWL8K_USE_AUTO_RATE 0x0002
3570 #define MWL8K_UCAST_RATE 0
3571
mwl8k_cmd_use_fixed_rate_sta(struct ieee80211_hw * hw)3572 static int mwl8k_cmd_use_fixed_rate_sta(struct ieee80211_hw *hw)
3573 {
3574 struct mwl8k_cmd_use_fixed_rate_sta *cmd;
3575 int rc;
3576
3577 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3578 if (cmd == NULL)
3579 return -ENOMEM;
3580
3581 cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
3582 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3583 cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE);
3584 cmd->rate_type = cpu_to_le32(MWL8K_UCAST_RATE);
3585
3586 rc = mwl8k_post_cmd(hw, &cmd->header);
3587 kfree(cmd);
3588
3589 return rc;
3590 }
3591
3592 /*
3593 * CMD_USE_FIXED_RATE (AP version).
3594 */
3595 struct mwl8k_cmd_use_fixed_rate_ap {
3596 struct mwl8k_cmd_pkt header;
3597 __le32 action;
3598 __le32 allow_rate_drop;
3599 __le32 num_rates;
3600 struct mwl8k_rate_entry_ap {
3601 __le32 is_ht_rate;
3602 __le32 enable_retry;
3603 __le32 rate;
3604 __le32 retry_count;
3605 } rate_entry[4];
3606 u8 multicast_rate;
3607 u8 multicast_rate_type;
3608 u8 management_rate;
3609 } __packed;
3610
3611 static int
mwl8k_cmd_use_fixed_rate_ap(struct ieee80211_hw * hw,int mcast,int mgmt)3612 mwl8k_cmd_use_fixed_rate_ap(struct ieee80211_hw *hw, int mcast, int mgmt)
3613 {
3614 struct mwl8k_cmd_use_fixed_rate_ap *cmd;
3615 int rc;
3616
3617 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3618 if (cmd == NULL)
3619 return -ENOMEM;
3620
3621 cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
3622 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3623 cmd->action = cpu_to_le32(MWL8K_USE_AUTO_RATE);
3624 cmd->multicast_rate = mcast;
3625 cmd->management_rate = mgmt;
3626
3627 rc = mwl8k_post_cmd(hw, &cmd->header);
3628 kfree(cmd);
3629
3630 return rc;
3631 }
3632
3633 /*
3634 * CMD_ENABLE_SNIFFER.
3635 */
3636 struct mwl8k_cmd_enable_sniffer {
3637 struct mwl8k_cmd_pkt header;
3638 __le32 action;
3639 } __packed;
3640
mwl8k_cmd_enable_sniffer(struct ieee80211_hw * hw,bool enable)3641 static int mwl8k_cmd_enable_sniffer(struct ieee80211_hw *hw, bool enable)
3642 {
3643 struct mwl8k_cmd_enable_sniffer *cmd;
3644 int rc;
3645
3646 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3647 if (cmd == NULL)
3648 return -ENOMEM;
3649
3650 cmd->header.code = cpu_to_le16(MWL8K_CMD_ENABLE_SNIFFER);
3651 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3652 cmd->action = cpu_to_le32(!!enable);
3653
3654 rc = mwl8k_post_cmd(hw, &cmd->header);
3655 kfree(cmd);
3656
3657 return rc;
3658 }
3659
3660 struct mwl8k_cmd_update_mac_addr {
3661 struct mwl8k_cmd_pkt header;
3662 union {
3663 struct {
3664 __le16 mac_type;
3665 __u8 mac_addr[ETH_ALEN];
3666 } mbss;
3667 __u8 mac_addr[ETH_ALEN];
3668 };
3669 } __packed;
3670
3671 #define MWL8K_MAC_TYPE_PRIMARY_CLIENT 0
3672 #define MWL8K_MAC_TYPE_SECONDARY_CLIENT 1
3673 #define MWL8K_MAC_TYPE_PRIMARY_AP 2
3674 #define MWL8K_MAC_TYPE_SECONDARY_AP 3
3675
mwl8k_cmd_update_mac_addr(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u8 * mac,bool set)3676 static int mwl8k_cmd_update_mac_addr(struct ieee80211_hw *hw,
3677 struct ieee80211_vif *vif, u8 *mac, bool set)
3678 {
3679 struct mwl8k_priv *priv = hw->priv;
3680 struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
3681 struct mwl8k_cmd_update_mac_addr *cmd;
3682 int mac_type;
3683 int rc;
3684
3685 mac_type = MWL8K_MAC_TYPE_PRIMARY_AP;
3686 if (vif != NULL && vif->type == NL80211_IFTYPE_STATION) {
3687 if (mwl8k_vif->macid + 1 == ffs(priv->sta_macids_supported))
3688 if (priv->ap_fw)
3689 mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT;
3690 else
3691 mac_type = MWL8K_MAC_TYPE_PRIMARY_CLIENT;
3692 else
3693 mac_type = MWL8K_MAC_TYPE_SECONDARY_CLIENT;
3694 } else if (vif != NULL && vif->type == NL80211_IFTYPE_AP) {
3695 if (mwl8k_vif->macid + 1 == ffs(priv->ap_macids_supported))
3696 mac_type = MWL8K_MAC_TYPE_PRIMARY_AP;
3697 else
3698 mac_type = MWL8K_MAC_TYPE_SECONDARY_AP;
3699 }
3700
3701 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3702 if (cmd == NULL)
3703 return -ENOMEM;
3704
3705 if (set)
3706 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_MAC_ADDR);
3707 else
3708 cmd->header.code = cpu_to_le16(MWL8K_CMD_DEL_MAC_ADDR);
3709
3710 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3711 if (priv->ap_fw) {
3712 cmd->mbss.mac_type = cpu_to_le16(mac_type);
3713 memcpy(cmd->mbss.mac_addr, mac, ETH_ALEN);
3714 } else {
3715 memcpy(cmd->mac_addr, mac, ETH_ALEN);
3716 }
3717
3718 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3719 kfree(cmd);
3720
3721 return rc;
3722 }
3723
3724 /*
3725 * MWL8K_CMD_SET_MAC_ADDR.
3726 */
mwl8k_cmd_set_mac_addr(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u8 * mac)3727 static inline int mwl8k_cmd_set_mac_addr(struct ieee80211_hw *hw,
3728 struct ieee80211_vif *vif, u8 *mac)
3729 {
3730 return mwl8k_cmd_update_mac_addr(hw, vif, mac, true);
3731 }
3732
3733 /*
3734 * MWL8K_CMD_DEL_MAC_ADDR.
3735 */
mwl8k_cmd_del_mac_addr(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u8 * mac)3736 static inline int mwl8k_cmd_del_mac_addr(struct ieee80211_hw *hw,
3737 struct ieee80211_vif *vif, u8 *mac)
3738 {
3739 return mwl8k_cmd_update_mac_addr(hw, vif, mac, false);
3740 }
3741
3742 /*
3743 * CMD_SET_RATEADAPT_MODE.
3744 */
3745 struct mwl8k_cmd_set_rate_adapt_mode {
3746 struct mwl8k_cmd_pkt header;
3747 __le16 action;
3748 __le16 mode;
3749 } __packed;
3750
mwl8k_cmd_set_rateadapt_mode(struct ieee80211_hw * hw,__u16 mode)3751 static int mwl8k_cmd_set_rateadapt_mode(struct ieee80211_hw *hw, __u16 mode)
3752 {
3753 struct mwl8k_cmd_set_rate_adapt_mode *cmd;
3754 int rc;
3755
3756 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3757 if (cmd == NULL)
3758 return -ENOMEM;
3759
3760 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATEADAPT_MODE);
3761 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3762 cmd->action = cpu_to_le16(MWL8K_CMD_SET);
3763 cmd->mode = cpu_to_le16(mode);
3764
3765 rc = mwl8k_post_cmd(hw, &cmd->header);
3766 kfree(cmd);
3767
3768 return rc;
3769 }
3770
3771 /*
3772 * CMD_GET_WATCHDOG_BITMAP.
3773 */
3774 struct mwl8k_cmd_get_watchdog_bitmap {
3775 struct mwl8k_cmd_pkt header;
3776 u8 bitmap;
3777 } __packed;
3778
mwl8k_cmd_get_watchdog_bitmap(struct ieee80211_hw * hw,u8 * bitmap)3779 static int mwl8k_cmd_get_watchdog_bitmap(struct ieee80211_hw *hw, u8 *bitmap)
3780 {
3781 struct mwl8k_cmd_get_watchdog_bitmap *cmd;
3782 int rc;
3783
3784 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3785 if (cmd == NULL)
3786 return -ENOMEM;
3787
3788 cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_WATCHDOG_BITMAP);
3789 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3790
3791 rc = mwl8k_post_cmd(hw, &cmd->header);
3792 if (!rc)
3793 *bitmap = cmd->bitmap;
3794
3795 kfree(cmd);
3796
3797 return rc;
3798 }
3799
3800 #define MWL8K_WMM_QUEUE_NUMBER 3
3801
3802 static void mwl8k_destroy_ba(struct ieee80211_hw *hw,
3803 u8 idx);
3804
mwl8k_watchdog_ba_events(struct work_struct * work)3805 static void mwl8k_watchdog_ba_events(struct work_struct *work)
3806 {
3807 int rc;
3808 u8 bitmap = 0, stream_index;
3809 struct mwl8k_ampdu_stream *streams;
3810 struct mwl8k_priv *priv =
3811 container_of(work, struct mwl8k_priv, watchdog_ba_handle);
3812 struct ieee80211_hw *hw = priv->hw;
3813 int i;
3814 u32 status = 0;
3815
3816 mwl8k_fw_lock(hw);
3817
3818 rc = mwl8k_cmd_get_watchdog_bitmap(priv->hw, &bitmap);
3819 if (rc)
3820 goto done;
3821
3822 spin_lock(&priv->stream_lock);
3823
3824 /* the bitmap is the hw queue number. Map it to the ampdu queue. */
3825 for (i = 0; i < TOTAL_HW_TX_QUEUES; i++) {
3826 if (bitmap & (1 << i)) {
3827 stream_index = (i + MWL8K_WMM_QUEUE_NUMBER) %
3828 TOTAL_HW_TX_QUEUES;
3829 streams = &priv->ampdu[stream_index];
3830 if (streams->state == AMPDU_STREAM_ACTIVE) {
3831 ieee80211_stop_tx_ba_session(streams->sta,
3832 streams->tid);
3833 spin_unlock(&priv->stream_lock);
3834 mwl8k_destroy_ba(hw, stream_index);
3835 spin_lock(&priv->stream_lock);
3836 }
3837 }
3838 }
3839
3840 spin_unlock(&priv->stream_lock);
3841 done:
3842 atomic_dec(&priv->watchdog_event_pending);
3843 status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
3844 iowrite32((status | MWL8K_A2H_INT_BA_WATCHDOG),
3845 priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
3846 mwl8k_fw_unlock(hw);
3847 return;
3848 }
3849
3850
3851 /*
3852 * CMD_BSS_START.
3853 */
3854 struct mwl8k_cmd_bss_start {
3855 struct mwl8k_cmd_pkt header;
3856 __le32 enable;
3857 } __packed;
3858
mwl8k_cmd_bss_start(struct ieee80211_hw * hw,struct ieee80211_vif * vif,int enable)3859 static int mwl8k_cmd_bss_start(struct ieee80211_hw *hw,
3860 struct ieee80211_vif *vif, int enable)
3861 {
3862 struct mwl8k_cmd_bss_start *cmd;
3863 struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
3864 struct mwl8k_priv *priv = hw->priv;
3865 int rc;
3866
3867 if (enable && (priv->running_bsses & (1 << mwl8k_vif->macid)))
3868 return 0;
3869
3870 if (!enable && !(priv->running_bsses & (1 << mwl8k_vif->macid)))
3871 return 0;
3872
3873 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3874 if (cmd == NULL)
3875 return -ENOMEM;
3876
3877 cmd->header.code = cpu_to_le16(MWL8K_CMD_BSS_START);
3878 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3879 cmd->enable = cpu_to_le32(enable);
3880
3881 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3882 kfree(cmd);
3883
3884 if (!rc) {
3885 if (enable)
3886 priv->running_bsses |= (1 << mwl8k_vif->macid);
3887 else
3888 priv->running_bsses &= ~(1 << mwl8k_vif->macid);
3889 }
3890 return rc;
3891 }
3892
mwl8k_enable_bsses(struct ieee80211_hw * hw,bool enable,u32 bitmap)3893 static void mwl8k_enable_bsses(struct ieee80211_hw *hw, bool enable, u32 bitmap)
3894 {
3895 struct mwl8k_priv *priv = hw->priv;
3896 struct mwl8k_vif *mwl8k_vif, *tmp_vif;
3897 struct ieee80211_vif *vif;
3898
3899 list_for_each_entry_safe(mwl8k_vif, tmp_vif, &priv->vif_list, list) {
3900 vif = mwl8k_vif->vif;
3901
3902 if (!(bitmap & (1 << mwl8k_vif->macid)))
3903 continue;
3904
3905 if (vif->type == NL80211_IFTYPE_AP)
3906 mwl8k_cmd_bss_start(hw, vif, enable);
3907 }
3908 }
3909 /*
3910 * CMD_BASTREAM.
3911 */
3912
3913 /*
3914 * UPSTREAM is tx direction
3915 */
3916 #define BASTREAM_FLAG_DIRECTION_UPSTREAM 0x00
3917 #define BASTREAM_FLAG_IMMEDIATE_TYPE 0x01
3918
3919 enum ba_stream_action_type {
3920 MWL8K_BA_CREATE,
3921 MWL8K_BA_UPDATE,
3922 MWL8K_BA_DESTROY,
3923 MWL8K_BA_FLUSH,
3924 MWL8K_BA_CHECK,
3925 };
3926
3927
3928 struct mwl8k_create_ba_stream {
3929 __le32 flags;
3930 __le32 idle_thrs;
3931 __le32 bar_thrs;
3932 __le32 window_size;
3933 u8 peer_mac_addr[6];
3934 u8 dialog_token;
3935 u8 tid;
3936 u8 queue_id;
3937 u8 param_info;
3938 __le32 ba_context;
3939 u8 reset_seq_no_flag;
3940 __le16 curr_seq_no;
3941 u8 sta_src_mac_addr[6];
3942 } __packed;
3943
3944 struct mwl8k_destroy_ba_stream {
3945 __le32 flags;
3946 __le32 ba_context;
3947 } __packed;
3948
3949 struct mwl8k_cmd_bastream {
3950 struct mwl8k_cmd_pkt header;
3951 __le32 action;
3952 union {
3953 struct mwl8k_create_ba_stream create_params;
3954 struct mwl8k_destroy_ba_stream destroy_params;
3955 };
3956 } __packed;
3957
3958 static int
mwl8k_check_ba(struct ieee80211_hw * hw,struct mwl8k_ampdu_stream * stream,struct ieee80211_vif * vif)3959 mwl8k_check_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream,
3960 struct ieee80211_vif *vif)
3961 {
3962 struct mwl8k_cmd_bastream *cmd;
3963 int rc;
3964
3965 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3966 if (cmd == NULL)
3967 return -ENOMEM;
3968
3969 cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
3970 cmd->header.length = cpu_to_le16(sizeof(*cmd));
3971
3972 cmd->action = cpu_to_le32(MWL8K_BA_CHECK);
3973
3974 cmd->create_params.queue_id = stream->idx;
3975 memcpy(&cmd->create_params.peer_mac_addr[0], stream->sta->addr,
3976 ETH_ALEN);
3977 cmd->create_params.tid = stream->tid;
3978
3979 cmd->create_params.flags =
3980 cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE) |
3981 cpu_to_le32(BASTREAM_FLAG_DIRECTION_UPSTREAM);
3982
3983 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
3984
3985 kfree(cmd);
3986
3987 return rc;
3988 }
3989
3990 static int
mwl8k_create_ba(struct ieee80211_hw * hw,struct mwl8k_ampdu_stream * stream,u8 buf_size,struct ieee80211_vif * vif)3991 mwl8k_create_ba(struct ieee80211_hw *hw, struct mwl8k_ampdu_stream *stream,
3992 u8 buf_size, struct ieee80211_vif *vif)
3993 {
3994 struct mwl8k_cmd_bastream *cmd;
3995 int rc;
3996
3997 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
3998 if (cmd == NULL)
3999 return -ENOMEM;
4000
4001
4002 cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
4003 cmd->header.length = cpu_to_le16(sizeof(*cmd));
4004
4005 cmd->action = cpu_to_le32(MWL8K_BA_CREATE);
4006
4007 cmd->create_params.bar_thrs = cpu_to_le32((u32)buf_size);
4008 cmd->create_params.window_size = cpu_to_le32((u32)buf_size);
4009 cmd->create_params.queue_id = stream->idx;
4010
4011 memcpy(cmd->create_params.peer_mac_addr, stream->sta->addr, ETH_ALEN);
4012 cmd->create_params.tid = stream->tid;
4013 cmd->create_params.curr_seq_no = cpu_to_le16(0);
4014 cmd->create_params.reset_seq_no_flag = 1;
4015
4016 cmd->create_params.param_info =
4017 (stream->sta->ht_cap.ampdu_factor &
4018 IEEE80211_HT_AMPDU_PARM_FACTOR) |
4019 ((stream->sta->ht_cap.ampdu_density << 2) &
4020 IEEE80211_HT_AMPDU_PARM_DENSITY);
4021
4022 cmd->create_params.flags =
4023 cpu_to_le32(BASTREAM_FLAG_IMMEDIATE_TYPE |
4024 BASTREAM_FLAG_DIRECTION_UPSTREAM);
4025
4026 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4027
4028 wiphy_debug(hw->wiphy, "Created a BA stream for %pM : tid %d\n",
4029 stream->sta->addr, stream->tid);
4030 kfree(cmd);
4031
4032 return rc;
4033 }
4034
mwl8k_destroy_ba(struct ieee80211_hw * hw,u8 idx)4035 static void mwl8k_destroy_ba(struct ieee80211_hw *hw,
4036 u8 idx)
4037 {
4038 struct mwl8k_cmd_bastream *cmd;
4039
4040 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4041 if (cmd == NULL)
4042 return;
4043
4044 cmd->header.code = cpu_to_le16(MWL8K_CMD_BASTREAM);
4045 cmd->header.length = cpu_to_le16(sizeof(*cmd));
4046 cmd->action = cpu_to_le32(MWL8K_BA_DESTROY);
4047
4048 cmd->destroy_params.ba_context = cpu_to_le32(idx);
4049 mwl8k_post_cmd(hw, &cmd->header);
4050
4051 wiphy_debug(hw->wiphy, "Deleted BA stream index %d\n", idx);
4052
4053 kfree(cmd);
4054 }
4055
4056 /*
4057 * CMD_SET_NEW_STN.
4058 */
4059 struct mwl8k_cmd_set_new_stn {
4060 struct mwl8k_cmd_pkt header;
4061 __le16 aid;
4062 __u8 mac_addr[6];
4063 __le16 stn_id;
4064 __le16 action;
4065 __le16 rsvd;
4066 __le32 legacy_rates;
4067 __u8 ht_rates[4];
4068 __le16 cap_info;
4069 __le16 ht_capabilities_info;
4070 __u8 mac_ht_param_info;
4071 __u8 rev;
4072 __u8 control_channel;
4073 __u8 add_channel;
4074 __le16 op_mode;
4075 __le16 stbc;
4076 __u8 add_qos_info;
4077 __u8 is_qos_sta;
4078 __le32 fw_sta_ptr;
4079 } __packed;
4080
4081 #define MWL8K_STA_ACTION_ADD 0
4082 #define MWL8K_STA_ACTION_REMOVE 2
4083
mwl8k_cmd_set_new_stn_add(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)4084 static int mwl8k_cmd_set_new_stn_add(struct ieee80211_hw *hw,
4085 struct ieee80211_vif *vif,
4086 struct ieee80211_sta *sta)
4087 {
4088 struct mwl8k_cmd_set_new_stn *cmd;
4089 u32 rates;
4090 int rc;
4091
4092 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4093 if (cmd == NULL)
4094 return -ENOMEM;
4095
4096 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4097 cmd->header.length = cpu_to_le16(sizeof(*cmd));
4098 cmd->aid = cpu_to_le16(sta->aid);
4099 memcpy(cmd->mac_addr, sta->addr, ETH_ALEN);
4100 cmd->stn_id = cpu_to_le16(sta->aid);
4101 cmd->action = cpu_to_le16(MWL8K_STA_ACTION_ADD);
4102 if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
4103 rates = sta->supp_rates[NL80211_BAND_2GHZ];
4104 else
4105 rates = sta->supp_rates[NL80211_BAND_5GHZ] << 5;
4106 cmd->legacy_rates = cpu_to_le32(rates);
4107 if (sta->ht_cap.ht_supported) {
4108 cmd->ht_rates[0] = sta->ht_cap.mcs.rx_mask[0];
4109 cmd->ht_rates[1] = sta->ht_cap.mcs.rx_mask[1];
4110 cmd->ht_rates[2] = sta->ht_cap.mcs.rx_mask[2];
4111 cmd->ht_rates[3] = sta->ht_cap.mcs.rx_mask[3];
4112 cmd->ht_capabilities_info = cpu_to_le16(sta->ht_cap.cap);
4113 cmd->mac_ht_param_info = (sta->ht_cap.ampdu_factor & 3) |
4114 ((sta->ht_cap.ampdu_density & 7) << 2);
4115 cmd->is_qos_sta = 1;
4116 }
4117
4118 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4119 kfree(cmd);
4120
4121 return rc;
4122 }
4123
mwl8k_cmd_set_new_stn_add_self(struct ieee80211_hw * hw,struct ieee80211_vif * vif)4124 static int mwl8k_cmd_set_new_stn_add_self(struct ieee80211_hw *hw,
4125 struct ieee80211_vif *vif)
4126 {
4127 struct mwl8k_cmd_set_new_stn *cmd;
4128 int rc;
4129
4130 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4131 if (cmd == NULL)
4132 return -ENOMEM;
4133
4134 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4135 cmd->header.length = cpu_to_le16(sizeof(*cmd));
4136 memcpy(cmd->mac_addr, vif->addr, ETH_ALEN);
4137
4138 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4139 kfree(cmd);
4140
4141 return rc;
4142 }
4143
mwl8k_cmd_set_new_stn_del(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u8 * addr)4144 static int mwl8k_cmd_set_new_stn_del(struct ieee80211_hw *hw,
4145 struct ieee80211_vif *vif, u8 *addr)
4146 {
4147 struct mwl8k_cmd_set_new_stn *cmd;
4148 struct mwl8k_priv *priv = hw->priv;
4149 int rc, i;
4150 u8 idx;
4151
4152 spin_lock(&priv->stream_lock);
4153 /* Destroy any active ampdu streams for this sta */
4154 for (i = 0; i < MWL8K_NUM_AMPDU_STREAMS; i++) {
4155 struct mwl8k_ampdu_stream *s;
4156 s = &priv->ampdu[i];
4157 if (s->state != AMPDU_NO_STREAM) {
4158 if (memcmp(s->sta->addr, addr, ETH_ALEN) == 0) {
4159 if (s->state == AMPDU_STREAM_ACTIVE) {
4160 idx = s->idx;
4161 spin_unlock(&priv->stream_lock);
4162 mwl8k_destroy_ba(hw, idx);
4163 spin_lock(&priv->stream_lock);
4164 } else if (s->state == AMPDU_STREAM_NEW) {
4165 mwl8k_remove_stream(hw, s);
4166 }
4167 }
4168 }
4169 }
4170
4171 spin_unlock(&priv->stream_lock);
4172
4173 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4174 if (cmd == NULL)
4175 return -ENOMEM;
4176
4177 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_NEW_STN);
4178 cmd->header.length = cpu_to_le16(sizeof(*cmd));
4179 memcpy(cmd->mac_addr, addr, ETH_ALEN);
4180 cmd->action = cpu_to_le16(MWL8K_STA_ACTION_REMOVE);
4181
4182 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4183 kfree(cmd);
4184
4185 return rc;
4186 }
4187
4188 /*
4189 * CMD_UPDATE_ENCRYPTION.
4190 */
4191
4192 #define MAX_ENCR_KEY_LENGTH 16
4193 #define MIC_KEY_LENGTH 8
4194
4195 struct mwl8k_cmd_update_encryption {
4196 struct mwl8k_cmd_pkt header;
4197
4198 __le32 action;
4199 __le32 reserved;
4200 __u8 mac_addr[6];
4201 __u8 encr_type;
4202
4203 } __packed;
4204
4205 struct mwl8k_cmd_set_key {
4206 struct mwl8k_cmd_pkt header;
4207
4208 __le32 action;
4209 __le32 reserved;
4210 __le16 length;
4211 __le16 key_type_id;
4212 __le32 key_info;
4213 __le32 key_id;
4214 __le16 key_len;
4215 __u8 key_material[MAX_ENCR_KEY_LENGTH];
4216 __u8 tkip_tx_mic_key[MIC_KEY_LENGTH];
4217 __u8 tkip_rx_mic_key[MIC_KEY_LENGTH];
4218 __le16 tkip_rsc_low;
4219 __le32 tkip_rsc_high;
4220 __le16 tkip_tsc_low;
4221 __le32 tkip_tsc_high;
4222 __u8 mac_addr[6];
4223 } __packed;
4224
4225 enum {
4226 MWL8K_ENCR_ENABLE,
4227 MWL8K_ENCR_SET_KEY,
4228 MWL8K_ENCR_REMOVE_KEY,
4229 MWL8K_ENCR_SET_GROUP_KEY,
4230 };
4231
4232 #define MWL8K_UPDATE_ENCRYPTION_TYPE_WEP 0
4233 #define MWL8K_UPDATE_ENCRYPTION_TYPE_DISABLE 1
4234 #define MWL8K_UPDATE_ENCRYPTION_TYPE_TKIP 4
4235 #define MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED 7
4236 #define MWL8K_UPDATE_ENCRYPTION_TYPE_AES 8
4237
4238 enum {
4239 MWL8K_ALG_WEP,
4240 MWL8K_ALG_TKIP,
4241 MWL8K_ALG_CCMP,
4242 };
4243
4244 #define MWL8K_KEY_FLAG_TXGROUPKEY 0x00000004
4245 #define MWL8K_KEY_FLAG_PAIRWISE 0x00000008
4246 #define MWL8K_KEY_FLAG_TSC_VALID 0x00000040
4247 #define MWL8K_KEY_FLAG_WEP_TXKEY 0x01000000
4248 #define MWL8K_KEY_FLAG_MICKEY_VALID 0x02000000
4249
mwl8k_cmd_update_encryption_enable(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u8 * addr,u8 encr_type)4250 static int mwl8k_cmd_update_encryption_enable(struct ieee80211_hw *hw,
4251 struct ieee80211_vif *vif,
4252 u8 *addr,
4253 u8 encr_type)
4254 {
4255 struct mwl8k_cmd_update_encryption *cmd;
4256 int rc;
4257
4258 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4259 if (cmd == NULL)
4260 return -ENOMEM;
4261
4262 cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION);
4263 cmd->header.length = cpu_to_le16(sizeof(*cmd));
4264 cmd->action = cpu_to_le32(MWL8K_ENCR_ENABLE);
4265 memcpy(cmd->mac_addr, addr, ETH_ALEN);
4266 cmd->encr_type = encr_type;
4267
4268 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4269 kfree(cmd);
4270
4271 return rc;
4272 }
4273
mwl8k_encryption_set_cmd_info(struct mwl8k_cmd_set_key * cmd,u8 * addr,struct ieee80211_key_conf * key)4274 static int mwl8k_encryption_set_cmd_info(struct mwl8k_cmd_set_key *cmd,
4275 u8 *addr,
4276 struct ieee80211_key_conf *key)
4277 {
4278 cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_ENCRYPTION);
4279 cmd->header.length = cpu_to_le16(sizeof(*cmd));
4280 cmd->length = cpu_to_le16(sizeof(*cmd) -
4281 offsetof(struct mwl8k_cmd_set_key, length));
4282 cmd->key_id = cpu_to_le32(key->keyidx);
4283 cmd->key_len = cpu_to_le16(key->keylen);
4284 memcpy(cmd->mac_addr, addr, ETH_ALEN);
4285
4286 switch (key->cipher) {
4287 case WLAN_CIPHER_SUITE_WEP40:
4288 case WLAN_CIPHER_SUITE_WEP104:
4289 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_WEP);
4290 if (key->keyidx == 0)
4291 cmd->key_info = cpu_to_le32(MWL8K_KEY_FLAG_WEP_TXKEY);
4292
4293 break;
4294 case WLAN_CIPHER_SUITE_TKIP:
4295 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_TKIP);
4296 cmd->key_info = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4297 ? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE)
4298 : cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY);
4299 cmd->key_info |= cpu_to_le32(MWL8K_KEY_FLAG_MICKEY_VALID
4300 | MWL8K_KEY_FLAG_TSC_VALID);
4301 break;
4302 case WLAN_CIPHER_SUITE_CCMP:
4303 cmd->key_type_id = cpu_to_le16(MWL8K_ALG_CCMP);
4304 cmd->key_info = (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4305 ? cpu_to_le32(MWL8K_KEY_FLAG_PAIRWISE)
4306 : cpu_to_le32(MWL8K_KEY_FLAG_TXGROUPKEY);
4307 break;
4308 default:
4309 return -ENOTSUPP;
4310 }
4311
4312 return 0;
4313 }
4314
mwl8k_cmd_encryption_set_key(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u8 * addr,struct ieee80211_key_conf * key)4315 static int mwl8k_cmd_encryption_set_key(struct ieee80211_hw *hw,
4316 struct ieee80211_vif *vif,
4317 u8 *addr,
4318 struct ieee80211_key_conf *key)
4319 {
4320 struct mwl8k_cmd_set_key *cmd;
4321 int rc;
4322 int keymlen;
4323 u32 action;
4324 u8 idx;
4325 struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4326
4327 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4328 if (cmd == NULL)
4329 return -ENOMEM;
4330
4331 rc = mwl8k_encryption_set_cmd_info(cmd, addr, key);
4332 if (rc < 0)
4333 goto done;
4334
4335 idx = key->keyidx;
4336
4337 if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
4338 action = MWL8K_ENCR_SET_KEY;
4339 else
4340 action = MWL8K_ENCR_SET_GROUP_KEY;
4341
4342 switch (key->cipher) {
4343 case WLAN_CIPHER_SUITE_WEP40:
4344 case WLAN_CIPHER_SUITE_WEP104:
4345 if (!mwl8k_vif->wep_key_conf[idx].enabled) {
4346 memcpy(mwl8k_vif->wep_key_conf[idx].key, key,
4347 sizeof(*key) + key->keylen);
4348 mwl8k_vif->wep_key_conf[idx].enabled = 1;
4349 }
4350
4351 keymlen = key->keylen;
4352 action = MWL8K_ENCR_SET_KEY;
4353 break;
4354 case WLAN_CIPHER_SUITE_TKIP:
4355 keymlen = MAX_ENCR_KEY_LENGTH + 2 * MIC_KEY_LENGTH;
4356 break;
4357 case WLAN_CIPHER_SUITE_CCMP:
4358 keymlen = key->keylen;
4359 break;
4360 default:
4361 rc = -ENOTSUPP;
4362 goto done;
4363 }
4364
4365 memcpy(cmd->key_material, key->key, keymlen);
4366 cmd->action = cpu_to_le32(action);
4367
4368 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4369 done:
4370 kfree(cmd);
4371
4372 return rc;
4373 }
4374
mwl8k_cmd_encryption_remove_key(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u8 * addr,struct ieee80211_key_conf * key)4375 static int mwl8k_cmd_encryption_remove_key(struct ieee80211_hw *hw,
4376 struct ieee80211_vif *vif,
4377 u8 *addr,
4378 struct ieee80211_key_conf *key)
4379 {
4380 struct mwl8k_cmd_set_key *cmd;
4381 int rc;
4382 struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4383
4384 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4385 if (cmd == NULL)
4386 return -ENOMEM;
4387
4388 rc = mwl8k_encryption_set_cmd_info(cmd, addr, key);
4389 if (rc < 0)
4390 goto done;
4391
4392 if (key->cipher == WLAN_CIPHER_SUITE_WEP40 ||
4393 key->cipher == WLAN_CIPHER_SUITE_WEP104)
4394 mwl8k_vif->wep_key_conf[key->keyidx].enabled = 0;
4395
4396 cmd->action = cpu_to_le32(MWL8K_ENCR_REMOVE_KEY);
4397
4398 rc = mwl8k_post_pervif_cmd(hw, vif, &cmd->header);
4399 done:
4400 kfree(cmd);
4401
4402 return rc;
4403 }
4404
mwl8k_set_key(struct ieee80211_hw * hw,enum set_key_cmd cmd_param,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * key)4405 static int mwl8k_set_key(struct ieee80211_hw *hw,
4406 enum set_key_cmd cmd_param,
4407 struct ieee80211_vif *vif,
4408 struct ieee80211_sta *sta,
4409 struct ieee80211_key_conf *key)
4410 {
4411 int rc = 0;
4412 u8 encr_type;
4413 u8 *addr;
4414 struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4415 struct mwl8k_priv *priv = hw->priv;
4416
4417 if (vif->type == NL80211_IFTYPE_STATION && !priv->ap_fw)
4418 return -EOPNOTSUPP;
4419
4420 if (sta == NULL)
4421 addr = vif->addr;
4422 else
4423 addr = sta->addr;
4424
4425 if (cmd_param == SET_KEY) {
4426 rc = mwl8k_cmd_encryption_set_key(hw, vif, addr, key);
4427 if (rc)
4428 goto out;
4429
4430 if ((key->cipher == WLAN_CIPHER_SUITE_WEP40)
4431 || (key->cipher == WLAN_CIPHER_SUITE_WEP104))
4432 encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_WEP;
4433 else
4434 encr_type = MWL8K_UPDATE_ENCRYPTION_TYPE_MIXED;
4435
4436 rc = mwl8k_cmd_update_encryption_enable(hw, vif, addr,
4437 encr_type);
4438 if (rc)
4439 goto out;
4440
4441 mwl8k_vif->is_hw_crypto_enabled = true;
4442
4443 } else {
4444 rc = mwl8k_cmd_encryption_remove_key(hw, vif, addr, key);
4445
4446 if (rc)
4447 goto out;
4448 }
4449 out:
4450 return rc;
4451 }
4452
4453 /*
4454 * CMD_UPDATE_STADB.
4455 */
4456 struct ewc_ht_info {
4457 __le16 control1;
4458 __le16 control2;
4459 __le16 control3;
4460 } __packed;
4461
4462 struct peer_capability_info {
4463 /* Peer type - AP vs. STA. */
4464 __u8 peer_type;
4465
4466 /* Basic 802.11 capabilities from assoc resp. */
4467 __le16 basic_caps;
4468
4469 /* Set if peer supports 802.11n high throughput (HT). */
4470 __u8 ht_support;
4471
4472 /* Valid if HT is supported. */
4473 __le16 ht_caps;
4474 __u8 extended_ht_caps;
4475 struct ewc_ht_info ewc_info;
4476
4477 /* Legacy rate table. Intersection of our rates and peer rates. */
4478 __u8 legacy_rates[12];
4479
4480 /* HT rate table. Intersection of our rates and peer rates. */
4481 __u8 ht_rates[16];
4482 __u8 pad[16];
4483
4484 /* If set, interoperability mode, no proprietary extensions. */
4485 __u8 interop;
4486 __u8 pad2;
4487 __u8 station_id;
4488 __le16 amsdu_enabled;
4489 } __packed;
4490
4491 struct mwl8k_cmd_update_stadb {
4492 struct mwl8k_cmd_pkt header;
4493
4494 /* See STADB_ACTION_TYPE */
4495 __le32 action;
4496
4497 /* Peer MAC address */
4498 __u8 peer_addr[ETH_ALEN];
4499
4500 __le32 reserved;
4501
4502 /* Peer info - valid during add/update. */
4503 struct peer_capability_info peer_info;
4504 } __packed;
4505
4506 #define MWL8K_STA_DB_MODIFY_ENTRY 1
4507 #define MWL8K_STA_DB_DEL_ENTRY 2
4508
4509 /* Peer Entry flags - used to define the type of the peer node */
4510 #define MWL8K_PEER_TYPE_ACCESSPOINT 2
4511
mwl8k_cmd_update_stadb_add(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)4512 static int mwl8k_cmd_update_stadb_add(struct ieee80211_hw *hw,
4513 struct ieee80211_vif *vif,
4514 struct ieee80211_sta *sta)
4515 {
4516 struct mwl8k_cmd_update_stadb *cmd;
4517 struct peer_capability_info *p;
4518 u32 rates;
4519 int rc;
4520
4521 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4522 if (cmd == NULL)
4523 return -ENOMEM;
4524
4525 cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
4526 cmd->header.length = cpu_to_le16(sizeof(*cmd));
4527 cmd->action = cpu_to_le32(MWL8K_STA_DB_MODIFY_ENTRY);
4528 memcpy(cmd->peer_addr, sta->addr, ETH_ALEN);
4529
4530 p = &cmd->peer_info;
4531 p->peer_type = MWL8K_PEER_TYPE_ACCESSPOINT;
4532 p->basic_caps = cpu_to_le16(vif->bss_conf.assoc_capability);
4533 p->ht_support = sta->ht_cap.ht_supported;
4534 p->ht_caps = cpu_to_le16(sta->ht_cap.cap);
4535 p->extended_ht_caps = (sta->ht_cap.ampdu_factor & 3) |
4536 ((sta->ht_cap.ampdu_density & 7) << 2);
4537 if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
4538 rates = sta->supp_rates[NL80211_BAND_2GHZ];
4539 else
4540 rates = sta->supp_rates[NL80211_BAND_5GHZ] << 5;
4541 legacy_rate_mask_to_array(p->legacy_rates, rates);
4542 memcpy(p->ht_rates, sta->ht_cap.mcs.rx_mask, 16);
4543 p->interop = 1;
4544 p->amsdu_enabled = 0;
4545
4546 rc = mwl8k_post_cmd(hw, &cmd->header);
4547 if (!rc)
4548 rc = p->station_id;
4549 kfree(cmd);
4550
4551 return rc;
4552 }
4553
mwl8k_cmd_update_stadb_del(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u8 * addr)4554 static int mwl8k_cmd_update_stadb_del(struct ieee80211_hw *hw,
4555 struct ieee80211_vif *vif, u8 *addr)
4556 {
4557 struct mwl8k_cmd_update_stadb *cmd;
4558 int rc;
4559
4560 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
4561 if (cmd == NULL)
4562 return -ENOMEM;
4563
4564 cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
4565 cmd->header.length = cpu_to_le16(sizeof(*cmd));
4566 cmd->action = cpu_to_le32(MWL8K_STA_DB_DEL_ENTRY);
4567 memcpy(cmd->peer_addr, addr, ETH_ALEN);
4568
4569 rc = mwl8k_post_cmd(hw, &cmd->header);
4570 kfree(cmd);
4571
4572 return rc;
4573 }
4574
4575
4576 /*
4577 * Interrupt handling.
4578 */
mwl8k_interrupt(int irq,void * dev_id)4579 static irqreturn_t mwl8k_interrupt(int irq, void *dev_id)
4580 {
4581 struct ieee80211_hw *hw = dev_id;
4582 struct mwl8k_priv *priv = hw->priv;
4583 u32 status;
4584
4585 status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4586 if (!status)
4587 return IRQ_NONE;
4588
4589 if (status & MWL8K_A2H_INT_TX_DONE) {
4590 status &= ~MWL8K_A2H_INT_TX_DONE;
4591 tasklet_schedule(&priv->poll_tx_task);
4592 }
4593
4594 if (status & MWL8K_A2H_INT_RX_READY) {
4595 status &= ~MWL8K_A2H_INT_RX_READY;
4596 tasklet_schedule(&priv->poll_rx_task);
4597 }
4598
4599 if (status & MWL8K_A2H_INT_BA_WATCHDOG) {
4600 iowrite32(~MWL8K_A2H_INT_BA_WATCHDOG,
4601 priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
4602
4603 atomic_inc(&priv->watchdog_event_pending);
4604 status &= ~MWL8K_A2H_INT_BA_WATCHDOG;
4605 ieee80211_queue_work(hw, &priv->watchdog_ba_handle);
4606 }
4607
4608 if (status)
4609 iowrite32(~status, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4610
4611 if (status & MWL8K_A2H_INT_OPC_DONE) {
4612 if (priv->hostcmd_wait != NULL)
4613 complete(priv->hostcmd_wait);
4614 }
4615
4616 if (status & MWL8K_A2H_INT_QUEUE_EMPTY) {
4617 if (!mutex_is_locked(&priv->fw_mutex) &&
4618 priv->radio_on && priv->pending_tx_pkts)
4619 mwl8k_tx_start(priv);
4620 }
4621
4622 return IRQ_HANDLED;
4623 }
4624
mwl8k_tx_poll(unsigned long data)4625 static void mwl8k_tx_poll(unsigned long data)
4626 {
4627 struct ieee80211_hw *hw = (struct ieee80211_hw *)data;
4628 struct mwl8k_priv *priv = hw->priv;
4629 int limit;
4630 int i;
4631
4632 limit = 32;
4633
4634 spin_lock_bh(&priv->tx_lock);
4635
4636 for (i = 0; i < mwl8k_tx_queues(priv); i++)
4637 limit -= mwl8k_txq_reclaim(hw, i, limit, 0);
4638
4639 if (!priv->pending_tx_pkts && priv->tx_wait != NULL) {
4640 complete(priv->tx_wait);
4641 priv->tx_wait = NULL;
4642 }
4643
4644 spin_unlock_bh(&priv->tx_lock);
4645
4646 if (limit) {
4647 writel(~MWL8K_A2H_INT_TX_DONE,
4648 priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4649 } else {
4650 tasklet_schedule(&priv->poll_tx_task);
4651 }
4652 }
4653
mwl8k_rx_poll(unsigned long data)4654 static void mwl8k_rx_poll(unsigned long data)
4655 {
4656 struct ieee80211_hw *hw = (struct ieee80211_hw *)data;
4657 struct mwl8k_priv *priv = hw->priv;
4658 int limit;
4659
4660 limit = 32;
4661 limit -= rxq_process(hw, 0, limit);
4662 limit -= rxq_refill(hw, 0, limit);
4663
4664 if (limit) {
4665 writel(~MWL8K_A2H_INT_RX_READY,
4666 priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
4667 } else {
4668 tasklet_schedule(&priv->poll_rx_task);
4669 }
4670 }
4671
4672
4673 /*
4674 * Core driver operations.
4675 */
mwl8k_tx(struct ieee80211_hw * hw,struct ieee80211_tx_control * control,struct sk_buff * skb)4676 static void mwl8k_tx(struct ieee80211_hw *hw,
4677 struct ieee80211_tx_control *control,
4678 struct sk_buff *skb)
4679 {
4680 struct mwl8k_priv *priv = hw->priv;
4681 int index = skb_get_queue_mapping(skb);
4682
4683 if (!priv->radio_on) {
4684 wiphy_debug(hw->wiphy,
4685 "dropped TX frame since radio disabled\n");
4686 dev_kfree_skb(skb);
4687 return;
4688 }
4689
4690 mwl8k_txq_xmit(hw, index, control->sta, skb);
4691 }
4692
mwl8k_start(struct ieee80211_hw * hw)4693 static int mwl8k_start(struct ieee80211_hw *hw)
4694 {
4695 struct mwl8k_priv *priv = hw->priv;
4696 int rc;
4697
4698 rc = request_irq(priv->pdev->irq, mwl8k_interrupt,
4699 IRQF_SHARED, MWL8K_NAME, hw);
4700 if (rc) {
4701 priv->irq = -1;
4702 wiphy_err(hw->wiphy, "failed to register IRQ handler\n");
4703 return -EIO;
4704 }
4705 priv->irq = priv->pdev->irq;
4706
4707 /* Enable TX reclaim and RX tasklets. */
4708 tasklet_enable(&priv->poll_tx_task);
4709 tasklet_enable(&priv->poll_rx_task);
4710
4711 /* Enable interrupts */
4712 iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4713 iowrite32(MWL8K_A2H_EVENTS,
4714 priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
4715
4716 rc = mwl8k_fw_lock(hw);
4717 if (!rc) {
4718 rc = mwl8k_cmd_radio_enable(hw);
4719
4720 if (!priv->ap_fw) {
4721 if (!rc)
4722 rc = mwl8k_cmd_enable_sniffer(hw, 0);
4723
4724 if (!rc)
4725 rc = mwl8k_cmd_set_pre_scan(hw);
4726
4727 if (!rc)
4728 rc = mwl8k_cmd_set_post_scan(hw,
4729 "\x00\x00\x00\x00\x00\x00");
4730 }
4731
4732 if (!rc)
4733 rc = mwl8k_cmd_set_rateadapt_mode(hw, 0);
4734
4735 if (!rc)
4736 rc = mwl8k_cmd_set_wmm_mode(hw, 0);
4737
4738 mwl8k_fw_unlock(hw);
4739 }
4740
4741 if (rc) {
4742 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4743 free_irq(priv->pdev->irq, hw);
4744 priv->irq = -1;
4745 tasklet_disable(&priv->poll_tx_task);
4746 tasklet_disable(&priv->poll_rx_task);
4747 } else {
4748 ieee80211_wake_queues(hw);
4749 }
4750
4751 return rc;
4752 }
4753
mwl8k_stop(struct ieee80211_hw * hw)4754 static void mwl8k_stop(struct ieee80211_hw *hw)
4755 {
4756 struct mwl8k_priv *priv = hw->priv;
4757 int i;
4758
4759 if (!priv->hw_restart_in_progress)
4760 mwl8k_cmd_radio_disable(hw);
4761
4762 ieee80211_stop_queues(hw);
4763
4764 /* Disable interrupts */
4765 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
4766 if (priv->irq != -1) {
4767 free_irq(priv->pdev->irq, hw);
4768 priv->irq = -1;
4769 }
4770
4771 /* Stop finalize join worker */
4772 cancel_work_sync(&priv->finalize_join_worker);
4773 cancel_work_sync(&priv->watchdog_ba_handle);
4774 if (priv->beacon_skb != NULL)
4775 dev_kfree_skb(priv->beacon_skb);
4776
4777 /* Stop TX reclaim and RX tasklets. */
4778 tasklet_disable(&priv->poll_tx_task);
4779 tasklet_disable(&priv->poll_rx_task);
4780
4781 /* Return all skbs to mac80211 */
4782 for (i = 0; i < mwl8k_tx_queues(priv); i++)
4783 mwl8k_txq_reclaim(hw, i, INT_MAX, 1);
4784 }
4785
4786 static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image);
4787
mwl8k_add_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)4788 static int mwl8k_add_interface(struct ieee80211_hw *hw,
4789 struct ieee80211_vif *vif)
4790 {
4791 struct mwl8k_priv *priv = hw->priv;
4792 struct mwl8k_vif *mwl8k_vif;
4793 u32 macids_supported;
4794 int macid, rc;
4795 struct mwl8k_device_info *di;
4796
4797 /*
4798 * Reject interface creation if sniffer mode is active, as
4799 * STA operation is mutually exclusive with hardware sniffer
4800 * mode. (Sniffer mode is only used on STA firmware.)
4801 */
4802 if (priv->sniffer_enabled) {
4803 wiphy_info(hw->wiphy,
4804 "unable to create STA interface because sniffer mode is enabled\n");
4805 return -EINVAL;
4806 }
4807
4808 di = priv->device_info;
4809 switch (vif->type) {
4810 case NL80211_IFTYPE_AP:
4811 if (!priv->ap_fw && di->fw_image_ap) {
4812 /* we must load the ap fw to meet this request */
4813 if (!list_empty(&priv->vif_list))
4814 return -EBUSY;
4815 rc = mwl8k_reload_firmware(hw, di->fw_image_ap);
4816 if (rc)
4817 return rc;
4818 }
4819 macids_supported = priv->ap_macids_supported;
4820 break;
4821 case NL80211_IFTYPE_STATION:
4822 if (priv->ap_fw && di->fw_image_sta) {
4823 if (!list_empty(&priv->vif_list)) {
4824 wiphy_warn(hw->wiphy, "AP interface is running.\n"
4825 "Adding STA interface for WDS");
4826 } else {
4827 /* we must load the sta fw to
4828 * meet this request.
4829 */
4830 rc = mwl8k_reload_firmware(hw,
4831 di->fw_image_sta);
4832 if (rc)
4833 return rc;
4834 }
4835 }
4836 macids_supported = priv->sta_macids_supported;
4837 break;
4838 default:
4839 return -EINVAL;
4840 }
4841
4842 macid = ffs(macids_supported & ~priv->macids_used);
4843 if (!macid--)
4844 return -EBUSY;
4845
4846 /* Setup driver private area. */
4847 mwl8k_vif = MWL8K_VIF(vif);
4848 memset(mwl8k_vif, 0, sizeof(*mwl8k_vif));
4849 mwl8k_vif->vif = vif;
4850 mwl8k_vif->macid = macid;
4851 mwl8k_vif->seqno = 0;
4852 memcpy(mwl8k_vif->bssid, vif->addr, ETH_ALEN);
4853 mwl8k_vif->is_hw_crypto_enabled = false;
4854
4855 /* Set the mac address. */
4856 mwl8k_cmd_set_mac_addr(hw, vif, vif->addr);
4857
4858 if (vif->type == NL80211_IFTYPE_AP)
4859 mwl8k_cmd_set_new_stn_add_self(hw, vif);
4860
4861 priv->macids_used |= 1 << mwl8k_vif->macid;
4862 list_add_tail(&mwl8k_vif->list, &priv->vif_list);
4863
4864 return 0;
4865 }
4866
mwl8k_remove_vif(struct mwl8k_priv * priv,struct mwl8k_vif * vif)4867 static void mwl8k_remove_vif(struct mwl8k_priv *priv, struct mwl8k_vif *vif)
4868 {
4869 /* Has ieee80211_restart_hw re-added the removed interfaces? */
4870 if (!priv->macids_used)
4871 return;
4872
4873 priv->macids_used &= ~(1 << vif->macid);
4874 list_del(&vif->list);
4875 }
4876
mwl8k_remove_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)4877 static void mwl8k_remove_interface(struct ieee80211_hw *hw,
4878 struct ieee80211_vif *vif)
4879 {
4880 struct mwl8k_priv *priv = hw->priv;
4881 struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
4882
4883 if (vif->type == NL80211_IFTYPE_AP)
4884 mwl8k_cmd_set_new_stn_del(hw, vif, vif->addr);
4885
4886 mwl8k_cmd_del_mac_addr(hw, vif, vif->addr);
4887
4888 mwl8k_remove_vif(priv, mwl8k_vif);
4889 }
4890
mwl8k_hw_restart_work(struct work_struct * work)4891 static void mwl8k_hw_restart_work(struct work_struct *work)
4892 {
4893 struct mwl8k_priv *priv =
4894 container_of(work, struct mwl8k_priv, fw_reload);
4895 struct ieee80211_hw *hw = priv->hw;
4896 struct mwl8k_device_info *di;
4897 int rc;
4898
4899 /* If some command is waiting for a response, clear it */
4900 if (priv->hostcmd_wait != NULL) {
4901 complete(priv->hostcmd_wait);
4902 priv->hostcmd_wait = NULL;
4903 }
4904
4905 priv->hw_restart_owner = current;
4906 di = priv->device_info;
4907 mwl8k_fw_lock(hw);
4908
4909 if (priv->ap_fw)
4910 rc = mwl8k_reload_firmware(hw, di->fw_image_ap);
4911 else
4912 rc = mwl8k_reload_firmware(hw, di->fw_image_sta);
4913
4914 if (rc)
4915 goto fail;
4916
4917 priv->hw_restart_owner = NULL;
4918 priv->hw_restart_in_progress = false;
4919
4920 /*
4921 * This unlock will wake up the queues and
4922 * also opens the command path for other
4923 * commands
4924 */
4925 mwl8k_fw_unlock(hw);
4926
4927 ieee80211_restart_hw(hw);
4928
4929 wiphy_err(hw->wiphy, "Firmware restarted successfully\n");
4930
4931 return;
4932 fail:
4933 mwl8k_fw_unlock(hw);
4934
4935 wiphy_err(hw->wiphy, "Firmware restart failed\n");
4936 }
4937
mwl8k_config(struct ieee80211_hw * hw,u32 changed)4938 static int mwl8k_config(struct ieee80211_hw *hw, u32 changed)
4939 {
4940 struct ieee80211_conf *conf = &hw->conf;
4941 struct mwl8k_priv *priv = hw->priv;
4942 int rc;
4943
4944 rc = mwl8k_fw_lock(hw);
4945 if (rc)
4946 return rc;
4947
4948 if (conf->flags & IEEE80211_CONF_IDLE)
4949 rc = mwl8k_cmd_radio_disable(hw);
4950 else
4951 rc = mwl8k_cmd_radio_enable(hw);
4952 if (rc)
4953 goto out;
4954
4955 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
4956 rc = mwl8k_cmd_set_rf_channel(hw, conf);
4957 if (rc)
4958 goto out;
4959 }
4960
4961 if (conf->power_level > 18)
4962 conf->power_level = 18;
4963
4964 if (priv->ap_fw) {
4965
4966 if (conf->flags & IEEE80211_CONF_CHANGE_POWER) {
4967 rc = mwl8k_cmd_tx_power(hw, conf, conf->power_level);
4968 if (rc)
4969 goto out;
4970 }
4971
4972
4973 } else {
4974 rc = mwl8k_cmd_rf_tx_power(hw, conf->power_level);
4975 if (rc)
4976 goto out;
4977 rc = mwl8k_cmd_mimo_config(hw, 0x7, 0x7);
4978 }
4979
4980 out:
4981 mwl8k_fw_unlock(hw);
4982
4983 return rc;
4984 }
4985
4986 static void
mwl8k_bss_info_changed_sta(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_bss_conf * info,u32 changed)4987 mwl8k_bss_info_changed_sta(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4988 struct ieee80211_bss_conf *info, u32 changed)
4989 {
4990 struct mwl8k_priv *priv = hw->priv;
4991 u32 ap_legacy_rates = 0;
4992 u8 ap_mcs_rates[16];
4993 int rc;
4994
4995 if (mwl8k_fw_lock(hw))
4996 return;
4997
4998 /*
4999 * No need to capture a beacon if we're no longer associated.
5000 */
5001 if ((changed & BSS_CHANGED_ASSOC) && !vif->bss_conf.assoc)
5002 priv->capture_beacon = false;
5003
5004 /*
5005 * Get the AP's legacy and MCS rates.
5006 */
5007 if (vif->bss_conf.assoc) {
5008 struct ieee80211_sta *ap;
5009
5010 rcu_read_lock();
5011
5012 ap = ieee80211_find_sta(vif, vif->bss_conf.bssid);
5013 if (ap == NULL) {
5014 rcu_read_unlock();
5015 goto out;
5016 }
5017
5018 if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ) {
5019 ap_legacy_rates = ap->supp_rates[NL80211_BAND_2GHZ];
5020 } else {
5021 ap_legacy_rates =
5022 ap->supp_rates[NL80211_BAND_5GHZ] << 5;
5023 }
5024 memcpy(ap_mcs_rates, ap->ht_cap.mcs.rx_mask, 16);
5025
5026 rcu_read_unlock();
5027
5028 if (changed & BSS_CHANGED_ASSOC) {
5029 if (!priv->ap_fw) {
5030 rc = mwl8k_cmd_set_rate(hw, vif,
5031 ap_legacy_rates,
5032 ap_mcs_rates);
5033 if (rc)
5034 goto out;
5035
5036 rc = mwl8k_cmd_use_fixed_rate_sta(hw);
5037 if (rc)
5038 goto out;
5039 } else {
5040 int idx;
5041 int rate;
5042
5043 /* Use AP firmware specific rate command.
5044 */
5045 idx = ffs(vif->bss_conf.basic_rates);
5046 if (idx)
5047 idx--;
5048
5049 if (hw->conf.chandef.chan->band ==
5050 NL80211_BAND_2GHZ)
5051 rate = mwl8k_rates_24[idx].hw_value;
5052 else
5053 rate = mwl8k_rates_50[idx].hw_value;
5054
5055 mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate);
5056 }
5057 }
5058 }
5059
5060 if (changed & BSS_CHANGED_ERP_PREAMBLE) {
5061 rc = mwl8k_set_radio_preamble(hw,
5062 vif->bss_conf.use_short_preamble);
5063 if (rc)
5064 goto out;
5065 }
5066
5067 if ((changed & BSS_CHANGED_ERP_SLOT) && !priv->ap_fw) {
5068 rc = mwl8k_cmd_set_slot(hw, vif->bss_conf.use_short_slot);
5069 if (rc)
5070 goto out;
5071 }
5072
5073 if (vif->bss_conf.assoc && !priv->ap_fw &&
5074 (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_ERP_CTS_PROT |
5075 BSS_CHANGED_HT))) {
5076 rc = mwl8k_cmd_set_aid(hw, vif, ap_legacy_rates);
5077 if (rc)
5078 goto out;
5079 }
5080
5081 if (vif->bss_conf.assoc &&
5082 (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_BEACON_INT))) {
5083 /*
5084 * Finalize the join. Tell rx handler to process
5085 * next beacon from our BSSID.
5086 */
5087 memcpy(priv->capture_bssid, vif->bss_conf.bssid, ETH_ALEN);
5088 priv->capture_beacon = true;
5089 }
5090
5091 out:
5092 mwl8k_fw_unlock(hw);
5093 }
5094
5095 static void
mwl8k_bss_info_changed_ap(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_bss_conf * info,u32 changed)5096 mwl8k_bss_info_changed_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5097 struct ieee80211_bss_conf *info, u32 changed)
5098 {
5099 int rc;
5100
5101 if (mwl8k_fw_lock(hw))
5102 return;
5103
5104 if (changed & BSS_CHANGED_ERP_PREAMBLE) {
5105 rc = mwl8k_set_radio_preamble(hw,
5106 vif->bss_conf.use_short_preamble);
5107 if (rc)
5108 goto out;
5109 }
5110
5111 if (changed & BSS_CHANGED_BASIC_RATES) {
5112 int idx;
5113 int rate;
5114
5115 /*
5116 * Use lowest supported basic rate for multicasts
5117 * and management frames (such as probe responses --
5118 * beacons will always go out at 1 Mb/s).
5119 */
5120 idx = ffs(vif->bss_conf.basic_rates);
5121 if (idx)
5122 idx--;
5123
5124 if (hw->conf.chandef.chan->band == NL80211_BAND_2GHZ)
5125 rate = mwl8k_rates_24[idx].hw_value;
5126 else
5127 rate = mwl8k_rates_50[idx].hw_value;
5128
5129 mwl8k_cmd_use_fixed_rate_ap(hw, rate, rate);
5130 }
5131
5132 if (changed & (BSS_CHANGED_BEACON_INT | BSS_CHANGED_BEACON)) {
5133 struct sk_buff *skb;
5134
5135 skb = ieee80211_beacon_get(hw, vif);
5136 if (skb != NULL) {
5137 mwl8k_cmd_set_beacon(hw, vif, skb->data, skb->len);
5138 kfree_skb(skb);
5139 }
5140 }
5141
5142 if (changed & BSS_CHANGED_BEACON_ENABLED)
5143 mwl8k_cmd_bss_start(hw, vif, info->enable_beacon);
5144
5145 out:
5146 mwl8k_fw_unlock(hw);
5147 }
5148
5149 static void
mwl8k_bss_info_changed(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_bss_conf * info,u32 changed)5150 mwl8k_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5151 struct ieee80211_bss_conf *info, u32 changed)
5152 {
5153 if (vif->type == NL80211_IFTYPE_STATION)
5154 mwl8k_bss_info_changed_sta(hw, vif, info, changed);
5155 if (vif->type == NL80211_IFTYPE_AP)
5156 mwl8k_bss_info_changed_ap(hw, vif, info, changed);
5157 }
5158
mwl8k_prepare_multicast(struct ieee80211_hw * hw,struct netdev_hw_addr_list * mc_list)5159 static u64 mwl8k_prepare_multicast(struct ieee80211_hw *hw,
5160 struct netdev_hw_addr_list *mc_list)
5161 {
5162 struct mwl8k_cmd_pkt *cmd;
5163
5164 /*
5165 * Synthesize and return a command packet that programs the
5166 * hardware multicast address filter. At this point we don't
5167 * know whether FIF_ALLMULTI is being requested, but if it is,
5168 * we'll end up throwing this packet away and creating a new
5169 * one in mwl8k_configure_filter().
5170 */
5171 cmd = __mwl8k_cmd_mac_multicast_adr(hw, 0, mc_list);
5172
5173 return (unsigned long)cmd;
5174 }
5175
5176 static int
mwl8k_configure_filter_sniffer(struct ieee80211_hw * hw,unsigned int changed_flags,unsigned int * total_flags)5177 mwl8k_configure_filter_sniffer(struct ieee80211_hw *hw,
5178 unsigned int changed_flags,
5179 unsigned int *total_flags)
5180 {
5181 struct mwl8k_priv *priv = hw->priv;
5182
5183 /*
5184 * Hardware sniffer mode is mutually exclusive with STA
5185 * operation, so refuse to enable sniffer mode if a STA
5186 * interface is active.
5187 */
5188 if (!list_empty(&priv->vif_list)) {
5189 if (net_ratelimit())
5190 wiphy_info(hw->wiphy,
5191 "not enabling sniffer mode because STA interface is active\n");
5192 return 0;
5193 }
5194
5195 if (!priv->sniffer_enabled) {
5196 if (mwl8k_cmd_enable_sniffer(hw, 1))
5197 return 0;
5198 priv->sniffer_enabled = true;
5199 }
5200
5201 *total_flags &= FIF_ALLMULTI |
5202 FIF_BCN_PRBRESP_PROMISC | FIF_CONTROL |
5203 FIF_OTHER_BSS;
5204
5205 return 1;
5206 }
5207
mwl8k_first_vif(struct mwl8k_priv * priv)5208 static struct mwl8k_vif *mwl8k_first_vif(struct mwl8k_priv *priv)
5209 {
5210 if (!list_empty(&priv->vif_list))
5211 return list_entry(priv->vif_list.next, struct mwl8k_vif, list);
5212
5213 return NULL;
5214 }
5215
mwl8k_configure_filter(struct ieee80211_hw * hw,unsigned int changed_flags,unsigned int * total_flags,u64 multicast)5216 static void mwl8k_configure_filter(struct ieee80211_hw *hw,
5217 unsigned int changed_flags,
5218 unsigned int *total_flags,
5219 u64 multicast)
5220 {
5221 struct mwl8k_priv *priv = hw->priv;
5222 struct mwl8k_cmd_pkt *cmd = (void *)(unsigned long)multicast;
5223
5224 /*
5225 * AP firmware doesn't allow fine-grained control over
5226 * the receive filter.
5227 */
5228 if (priv->ap_fw) {
5229 *total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC;
5230 kfree(cmd);
5231 return;
5232 }
5233
5234 /*
5235 * Enable hardware sniffer mode if FIF_CONTROL or
5236 * FIF_OTHER_BSS is requested.
5237 */
5238 if (*total_flags & (FIF_CONTROL | FIF_OTHER_BSS) &&
5239 mwl8k_configure_filter_sniffer(hw, changed_flags, total_flags)) {
5240 kfree(cmd);
5241 return;
5242 }
5243
5244 /* Clear unsupported feature flags */
5245 *total_flags &= FIF_ALLMULTI | FIF_BCN_PRBRESP_PROMISC;
5246
5247 if (mwl8k_fw_lock(hw)) {
5248 kfree(cmd);
5249 return;
5250 }
5251
5252 if (priv->sniffer_enabled) {
5253 mwl8k_cmd_enable_sniffer(hw, 0);
5254 priv->sniffer_enabled = false;
5255 }
5256
5257 if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
5258 if (*total_flags & FIF_BCN_PRBRESP_PROMISC) {
5259 /*
5260 * Disable the BSS filter.
5261 */
5262 mwl8k_cmd_set_pre_scan(hw);
5263 } else {
5264 struct mwl8k_vif *mwl8k_vif;
5265 const u8 *bssid;
5266
5267 /*
5268 * Enable the BSS filter.
5269 *
5270 * If there is an active STA interface, use that
5271 * interface's BSSID, otherwise use a dummy one
5272 * (where the OUI part needs to be nonzero for
5273 * the BSSID to be accepted by POST_SCAN).
5274 */
5275 mwl8k_vif = mwl8k_first_vif(priv);
5276 if (mwl8k_vif != NULL)
5277 bssid = mwl8k_vif->vif->bss_conf.bssid;
5278 else
5279 bssid = "\x01\x00\x00\x00\x00\x00";
5280
5281 mwl8k_cmd_set_post_scan(hw, bssid);
5282 }
5283 }
5284
5285 /*
5286 * If FIF_ALLMULTI is being requested, throw away the command
5287 * packet that ->prepare_multicast() built and replace it with
5288 * a command packet that enables reception of all multicast
5289 * packets.
5290 */
5291 if (*total_flags & FIF_ALLMULTI) {
5292 kfree(cmd);
5293 cmd = __mwl8k_cmd_mac_multicast_adr(hw, 1, NULL);
5294 }
5295
5296 if (cmd != NULL) {
5297 mwl8k_post_cmd(hw, cmd);
5298 kfree(cmd);
5299 }
5300
5301 mwl8k_fw_unlock(hw);
5302 }
5303
mwl8k_set_rts_threshold(struct ieee80211_hw * hw,u32 value)5304 static int mwl8k_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
5305 {
5306 return mwl8k_cmd_set_rts_threshold(hw, value);
5307 }
5308
mwl8k_sta_remove(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)5309 static int mwl8k_sta_remove(struct ieee80211_hw *hw,
5310 struct ieee80211_vif *vif,
5311 struct ieee80211_sta *sta)
5312 {
5313 struct mwl8k_priv *priv = hw->priv;
5314
5315 if (priv->ap_fw)
5316 return mwl8k_cmd_set_new_stn_del(hw, vif, sta->addr);
5317 else
5318 return mwl8k_cmd_update_stadb_del(hw, vif, sta->addr);
5319 }
5320
mwl8k_sta_add(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_sta * sta)5321 static int mwl8k_sta_add(struct ieee80211_hw *hw,
5322 struct ieee80211_vif *vif,
5323 struct ieee80211_sta *sta)
5324 {
5325 struct mwl8k_priv *priv = hw->priv;
5326 int ret;
5327 int i;
5328 struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
5329 struct ieee80211_key_conf *key;
5330
5331 if (!priv->ap_fw) {
5332 ret = mwl8k_cmd_update_stadb_add(hw, vif, sta);
5333 if (ret >= 0) {
5334 MWL8K_STA(sta)->peer_id = ret;
5335 if (sta->ht_cap.ht_supported)
5336 MWL8K_STA(sta)->is_ampdu_allowed = true;
5337 ret = 0;
5338 }
5339
5340 } else {
5341 ret = mwl8k_cmd_set_new_stn_add(hw, vif, sta);
5342 }
5343
5344 for (i = 0; i < NUM_WEP_KEYS; i++) {
5345 key = IEEE80211_KEY_CONF(mwl8k_vif->wep_key_conf[i].key);
5346 if (mwl8k_vif->wep_key_conf[i].enabled)
5347 mwl8k_set_key(hw, SET_KEY, vif, sta, key);
5348 }
5349 return ret;
5350 }
5351
mwl8k_conf_tx(struct ieee80211_hw * hw,struct ieee80211_vif * vif,u16 queue,const struct ieee80211_tx_queue_params * params)5352 static int mwl8k_conf_tx(struct ieee80211_hw *hw,
5353 struct ieee80211_vif *vif, u16 queue,
5354 const struct ieee80211_tx_queue_params *params)
5355 {
5356 struct mwl8k_priv *priv = hw->priv;
5357 int rc;
5358
5359 rc = mwl8k_fw_lock(hw);
5360 if (!rc) {
5361 BUG_ON(queue > MWL8K_TX_WMM_QUEUES - 1);
5362 memcpy(&priv->wmm_params[queue], params, sizeof(*params));
5363
5364 if (!priv->wmm_enabled)
5365 rc = mwl8k_cmd_set_wmm_mode(hw, 1);
5366
5367 if (!rc) {
5368 int q = MWL8K_TX_WMM_QUEUES - 1 - queue;
5369 rc = mwl8k_cmd_set_edca_params(hw, q,
5370 params->cw_min,
5371 params->cw_max,
5372 params->aifs,
5373 params->txop);
5374 }
5375
5376 mwl8k_fw_unlock(hw);
5377 }
5378
5379 return rc;
5380 }
5381
mwl8k_get_stats(struct ieee80211_hw * hw,struct ieee80211_low_level_stats * stats)5382 static int mwl8k_get_stats(struct ieee80211_hw *hw,
5383 struct ieee80211_low_level_stats *stats)
5384 {
5385 return mwl8k_cmd_get_stat(hw, stats);
5386 }
5387
mwl8k_get_survey(struct ieee80211_hw * hw,int idx,struct survey_info * survey)5388 static int mwl8k_get_survey(struct ieee80211_hw *hw, int idx,
5389 struct survey_info *survey)
5390 {
5391 struct mwl8k_priv *priv = hw->priv;
5392 struct ieee80211_conf *conf = &hw->conf;
5393 struct ieee80211_supported_band *sband;
5394
5395 if (priv->ap_fw) {
5396 sband = hw->wiphy->bands[NL80211_BAND_2GHZ];
5397
5398 if (sband && idx >= sband->n_channels) {
5399 idx -= sband->n_channels;
5400 sband = NULL;
5401 }
5402
5403 if (!sband)
5404 sband = hw->wiphy->bands[NL80211_BAND_5GHZ];
5405
5406 if (!sband || idx >= sband->n_channels)
5407 return -ENOENT;
5408
5409 memcpy(survey, &priv->survey[idx], sizeof(*survey));
5410 survey->channel = &sband->channels[idx];
5411
5412 return 0;
5413 }
5414
5415 if (idx != 0)
5416 return -ENOENT;
5417
5418 survey->channel = conf->chandef.chan;
5419 survey->filled = SURVEY_INFO_NOISE_DBM;
5420 survey->noise = priv->noise;
5421
5422 return 0;
5423 }
5424
5425 #define MAX_AMPDU_ATTEMPTS 5
5426
5427 static int
mwl8k_ampdu_action(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_ampdu_params * params)5428 mwl8k_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5429 struct ieee80211_ampdu_params *params)
5430 {
5431 struct ieee80211_sta *sta = params->sta;
5432 enum ieee80211_ampdu_mlme_action action = params->action;
5433 u16 tid = params->tid;
5434 u16 *ssn = ¶ms->ssn;
5435 u8 buf_size = params->buf_size;
5436 int i, rc = 0;
5437 struct mwl8k_priv *priv = hw->priv;
5438 struct mwl8k_ampdu_stream *stream;
5439 u8 *addr = sta->addr, idx;
5440 struct mwl8k_sta *sta_info = MWL8K_STA(sta);
5441
5442 if (!ieee80211_hw_check(hw, AMPDU_AGGREGATION))
5443 return -ENOTSUPP;
5444
5445 spin_lock(&priv->stream_lock);
5446 stream = mwl8k_lookup_stream(hw, addr, tid);
5447
5448 switch (action) {
5449 case IEEE80211_AMPDU_RX_START:
5450 case IEEE80211_AMPDU_RX_STOP:
5451 break;
5452 case IEEE80211_AMPDU_TX_START:
5453 /* By the time we get here the hw queues may contain outgoing
5454 * packets for this RA/TID that are not part of this BA
5455 * session. The hw will assign sequence numbers to these
5456 * packets as they go out. So if we query the hw for its next
5457 * sequence number and use that for the SSN here, it may end up
5458 * being wrong, which will lead to sequence number mismatch at
5459 * the recipient. To avoid this, we reset the sequence number
5460 * to O for the first MPDU in this BA stream.
5461 */
5462 *ssn = 0;
5463 if (stream == NULL) {
5464 /* This means that somebody outside this driver called
5465 * ieee80211_start_tx_ba_session. This is unexpected
5466 * because we do our own rate control. Just warn and
5467 * move on.
5468 */
5469 wiphy_warn(hw->wiphy, "Unexpected call to %s. "
5470 "Proceeding anyway.\n", __func__);
5471 stream = mwl8k_add_stream(hw, sta, tid);
5472 }
5473 if (stream == NULL) {
5474 wiphy_debug(hw->wiphy, "no free AMPDU streams\n");
5475 rc = -EBUSY;
5476 break;
5477 }
5478 stream->state = AMPDU_STREAM_IN_PROGRESS;
5479
5480 /* Release the lock before we do the time consuming stuff */
5481 spin_unlock(&priv->stream_lock);
5482 for (i = 0; i < MAX_AMPDU_ATTEMPTS; i++) {
5483
5484 /* Check if link is still valid */
5485 if (!sta_info->is_ampdu_allowed) {
5486 spin_lock(&priv->stream_lock);
5487 mwl8k_remove_stream(hw, stream);
5488 spin_unlock(&priv->stream_lock);
5489 return -EBUSY;
5490 }
5491
5492 rc = mwl8k_check_ba(hw, stream, vif);
5493
5494 /* If HW restart is in progress mwl8k_post_cmd will
5495 * return -EBUSY. Avoid retrying mwl8k_check_ba in
5496 * such cases
5497 */
5498 if (!rc || rc == -EBUSY)
5499 break;
5500 /*
5501 * HW queues take time to be flushed, give them
5502 * sufficient time
5503 */
5504
5505 msleep(1000);
5506 }
5507 spin_lock(&priv->stream_lock);
5508 if (rc) {
5509 wiphy_err(hw->wiphy, "Stream for tid %d busy after %d"
5510 " attempts\n", tid, MAX_AMPDU_ATTEMPTS);
5511 mwl8k_remove_stream(hw, stream);
5512 rc = -EBUSY;
5513 break;
5514 }
5515 ieee80211_start_tx_ba_cb_irqsafe(vif, addr, tid);
5516 break;
5517 case IEEE80211_AMPDU_TX_STOP_CONT:
5518 case IEEE80211_AMPDU_TX_STOP_FLUSH:
5519 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
5520 if (stream) {
5521 if (stream->state == AMPDU_STREAM_ACTIVE) {
5522 idx = stream->idx;
5523 spin_unlock(&priv->stream_lock);
5524 mwl8k_destroy_ba(hw, idx);
5525 spin_lock(&priv->stream_lock);
5526 }
5527 mwl8k_remove_stream(hw, stream);
5528 }
5529 ieee80211_stop_tx_ba_cb_irqsafe(vif, addr, tid);
5530 break;
5531 case IEEE80211_AMPDU_TX_OPERATIONAL:
5532 BUG_ON(stream == NULL);
5533 BUG_ON(stream->state != AMPDU_STREAM_IN_PROGRESS);
5534 spin_unlock(&priv->stream_lock);
5535 rc = mwl8k_create_ba(hw, stream, buf_size, vif);
5536 spin_lock(&priv->stream_lock);
5537 if (!rc)
5538 stream->state = AMPDU_STREAM_ACTIVE;
5539 else {
5540 idx = stream->idx;
5541 spin_unlock(&priv->stream_lock);
5542 mwl8k_destroy_ba(hw, idx);
5543 spin_lock(&priv->stream_lock);
5544 wiphy_debug(hw->wiphy,
5545 "Failed adding stream for sta %pM tid %d\n",
5546 addr, tid);
5547 mwl8k_remove_stream(hw, stream);
5548 }
5549 break;
5550
5551 default:
5552 rc = -ENOTSUPP;
5553 }
5554
5555 spin_unlock(&priv->stream_lock);
5556 return rc;
5557 }
5558
mwl8k_sw_scan_start(struct ieee80211_hw * hw,struct ieee80211_vif * vif,const u8 * mac_addr)5559 static void mwl8k_sw_scan_start(struct ieee80211_hw *hw,
5560 struct ieee80211_vif *vif,
5561 const u8 *mac_addr)
5562 {
5563 struct mwl8k_priv *priv = hw->priv;
5564 u8 tmp;
5565
5566 if (!priv->ap_fw)
5567 return;
5568
5569 /* clear all stats */
5570 priv->channel_time = 0;
5571 ioread32(priv->regs + BBU_RXRDY_CNT_REG);
5572 ioread32(priv->regs + NOK_CCA_CNT_REG);
5573 mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &tmp);
5574
5575 priv->sw_scan_start = true;
5576 }
5577
mwl8k_sw_scan_complete(struct ieee80211_hw * hw,struct ieee80211_vif * vif)5578 static void mwl8k_sw_scan_complete(struct ieee80211_hw *hw,
5579 struct ieee80211_vif *vif)
5580 {
5581 struct mwl8k_priv *priv = hw->priv;
5582 u8 tmp;
5583
5584 if (!priv->ap_fw)
5585 return;
5586
5587 priv->sw_scan_start = false;
5588
5589 /* clear all stats */
5590 priv->channel_time = 0;
5591 ioread32(priv->regs + BBU_RXRDY_CNT_REG);
5592 ioread32(priv->regs + NOK_CCA_CNT_REG);
5593 mwl8k_cmd_bbp_reg_access(priv->hw, 0, BBU_AVG_NOISE_VAL, &tmp);
5594 }
5595
5596 static const struct ieee80211_ops mwl8k_ops = {
5597 .tx = mwl8k_tx,
5598 .start = mwl8k_start,
5599 .stop = mwl8k_stop,
5600 .add_interface = mwl8k_add_interface,
5601 .remove_interface = mwl8k_remove_interface,
5602 .config = mwl8k_config,
5603 .bss_info_changed = mwl8k_bss_info_changed,
5604 .prepare_multicast = mwl8k_prepare_multicast,
5605 .configure_filter = mwl8k_configure_filter,
5606 .set_key = mwl8k_set_key,
5607 .set_rts_threshold = mwl8k_set_rts_threshold,
5608 .sta_add = mwl8k_sta_add,
5609 .sta_remove = mwl8k_sta_remove,
5610 .conf_tx = mwl8k_conf_tx,
5611 .get_stats = mwl8k_get_stats,
5612 .get_survey = mwl8k_get_survey,
5613 .ampdu_action = mwl8k_ampdu_action,
5614 .sw_scan_start = mwl8k_sw_scan_start,
5615 .sw_scan_complete = mwl8k_sw_scan_complete,
5616 };
5617
mwl8k_finalize_join_worker(struct work_struct * work)5618 static void mwl8k_finalize_join_worker(struct work_struct *work)
5619 {
5620 struct mwl8k_priv *priv =
5621 container_of(work, struct mwl8k_priv, finalize_join_worker);
5622 struct sk_buff *skb = priv->beacon_skb;
5623 struct ieee80211_mgmt *mgmt = (void *)skb->data;
5624 int len = skb->len - offsetof(struct ieee80211_mgmt, u.beacon.variable);
5625 const u8 *tim = cfg80211_find_ie(WLAN_EID_TIM,
5626 mgmt->u.beacon.variable, len);
5627 int dtim_period = 1;
5628
5629 if (tim && tim[1] >= 2)
5630 dtim_period = tim[3];
5631
5632 mwl8k_cmd_finalize_join(priv->hw, skb->data, skb->len, dtim_period);
5633
5634 dev_kfree_skb(skb);
5635 priv->beacon_skb = NULL;
5636 }
5637
5638 enum {
5639 MWL8363 = 0,
5640 MWL8687,
5641 MWL8366,
5642 MWL8764,
5643 };
5644
5645 #define MWL8K_8366_AP_FW_API 3
5646 #define _MWL8K_8366_AP_FW(api) "mwl8k/fmimage_8366_ap-" #api ".fw"
5647 #define MWL8K_8366_AP_FW(api) _MWL8K_8366_AP_FW(api)
5648
5649 #define MWL8K_8764_AP_FW_API 1
5650 #define _MWL8K_8764_AP_FW(api) "mwl8k/fmimage_8764_ap-" #api ".fw"
5651 #define MWL8K_8764_AP_FW(api) _MWL8K_8764_AP_FW(api)
5652
5653 static struct mwl8k_device_info mwl8k_info_tbl[] = {
5654 [MWL8363] = {
5655 .part_name = "88w8363",
5656 .helper_image = "mwl8k/helper_8363.fw",
5657 .fw_image_sta = "mwl8k/fmimage_8363.fw",
5658 },
5659 [MWL8687] = {
5660 .part_name = "88w8687",
5661 .helper_image = "mwl8k/helper_8687.fw",
5662 .fw_image_sta = "mwl8k/fmimage_8687.fw",
5663 },
5664 [MWL8366] = {
5665 .part_name = "88w8366",
5666 .helper_image = "mwl8k/helper_8366.fw",
5667 .fw_image_sta = "mwl8k/fmimage_8366.fw",
5668 .fw_image_ap = MWL8K_8366_AP_FW(MWL8K_8366_AP_FW_API),
5669 .fw_api_ap = MWL8K_8366_AP_FW_API,
5670 .ap_rxd_ops = &rxd_ap_ops,
5671 },
5672 [MWL8764] = {
5673 .part_name = "88w8764",
5674 .fw_image_ap = MWL8K_8764_AP_FW(MWL8K_8764_AP_FW_API),
5675 .fw_api_ap = MWL8K_8764_AP_FW_API,
5676 .ap_rxd_ops = &rxd_ap_ops,
5677 },
5678 };
5679
5680 MODULE_FIRMWARE("mwl8k/helper_8363.fw");
5681 MODULE_FIRMWARE("mwl8k/fmimage_8363.fw");
5682 MODULE_FIRMWARE("mwl8k/helper_8687.fw");
5683 MODULE_FIRMWARE("mwl8k/fmimage_8687.fw");
5684 MODULE_FIRMWARE("mwl8k/helper_8366.fw");
5685 MODULE_FIRMWARE("mwl8k/fmimage_8366.fw");
5686 MODULE_FIRMWARE(MWL8K_8366_AP_FW(MWL8K_8366_AP_FW_API));
5687
5688 static const struct pci_device_id mwl8k_pci_id_table[] = {
5689 { PCI_VDEVICE(MARVELL, 0x2a0a), .driver_data = MWL8363, },
5690 { PCI_VDEVICE(MARVELL, 0x2a0c), .driver_data = MWL8363, },
5691 { PCI_VDEVICE(MARVELL, 0x2a24), .driver_data = MWL8363, },
5692 { PCI_VDEVICE(MARVELL, 0x2a2b), .driver_data = MWL8687, },
5693 { PCI_VDEVICE(MARVELL, 0x2a30), .driver_data = MWL8687, },
5694 { PCI_VDEVICE(MARVELL, 0x2a40), .driver_data = MWL8366, },
5695 { PCI_VDEVICE(MARVELL, 0x2a41), .driver_data = MWL8366, },
5696 { PCI_VDEVICE(MARVELL, 0x2a42), .driver_data = MWL8366, },
5697 { PCI_VDEVICE(MARVELL, 0x2a43), .driver_data = MWL8366, },
5698 { PCI_VDEVICE(MARVELL, 0x2b36), .driver_data = MWL8764, },
5699 { },
5700 };
5701 MODULE_DEVICE_TABLE(pci, mwl8k_pci_id_table);
5702
mwl8k_request_alt_fw(struct mwl8k_priv * priv)5703 static int mwl8k_request_alt_fw(struct mwl8k_priv *priv)
5704 {
5705 int rc;
5706 printk(KERN_ERR "%s: Error requesting preferred fw %s.\n"
5707 "Trying alternative firmware %s\n", pci_name(priv->pdev),
5708 priv->fw_pref, priv->fw_alt);
5709 rc = mwl8k_request_fw(priv, priv->fw_alt, &priv->fw_ucode, true);
5710 if (rc) {
5711 printk(KERN_ERR "%s: Error requesting alt fw %s\n",
5712 pci_name(priv->pdev), priv->fw_alt);
5713 return rc;
5714 }
5715 return 0;
5716 }
5717
5718 static int mwl8k_firmware_load_success(struct mwl8k_priv *priv);
mwl8k_fw_state_machine(const struct firmware * fw,void * context)5719 static void mwl8k_fw_state_machine(const struct firmware *fw, void *context)
5720 {
5721 struct mwl8k_priv *priv = context;
5722 struct mwl8k_device_info *di = priv->device_info;
5723 int rc;
5724
5725 switch (priv->fw_state) {
5726 case FW_STATE_INIT:
5727 if (!fw) {
5728 printk(KERN_ERR "%s: Error requesting helper fw %s\n",
5729 pci_name(priv->pdev), di->helper_image);
5730 goto fail;
5731 }
5732 priv->fw_helper = fw;
5733 rc = mwl8k_request_fw(priv, priv->fw_pref, &priv->fw_ucode,
5734 true);
5735 if (rc && priv->fw_alt) {
5736 rc = mwl8k_request_alt_fw(priv);
5737 if (rc)
5738 goto fail;
5739 priv->fw_state = FW_STATE_LOADING_ALT;
5740 } else if (rc)
5741 goto fail;
5742 else
5743 priv->fw_state = FW_STATE_LOADING_PREF;
5744 break;
5745
5746 case FW_STATE_LOADING_PREF:
5747 if (!fw) {
5748 if (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
5754 goto fail;
5755 } else {
5756 priv->fw_ucode = fw;
5757 rc = mwl8k_firmware_load_success(priv);
5758 if (rc)
5759 goto fail;
5760 else
5761 complete(&priv->firmware_loading_complete);
5762 }
5763 break;
5764
5765 case FW_STATE_LOADING_ALT:
5766 if (!fw) {
5767 printk(KERN_ERR "%s: Error requesting alt fw %s\n",
5768 pci_name(priv->pdev), di->helper_image);
5769 goto fail;
5770 }
5771 priv->fw_ucode = fw;
5772 rc = mwl8k_firmware_load_success(priv);
5773 if (rc)
5774 goto fail;
5775 else
5776 complete(&priv->firmware_loading_complete);
5777 break;
5778
5779 default:
5780 printk(KERN_ERR "%s: Unexpected firmware loading state: %d\n",
5781 MWL8K_NAME, priv->fw_state);
5782 BUG_ON(1);
5783 }
5784
5785 return;
5786
5787 fail:
5788 priv->fw_state = FW_STATE_ERROR;
5789 complete(&priv->firmware_loading_complete);
5790 device_release_driver(&priv->pdev->dev);
5791 mwl8k_release_firmware(priv);
5792 }
5793
5794 #define MAX_RESTART_ATTEMPTS 1
mwl8k_init_firmware(struct ieee80211_hw * hw,char * fw_image,bool nowait)5795 static int mwl8k_init_firmware(struct ieee80211_hw *hw, char *fw_image,
5796 bool nowait)
5797 {
5798 struct mwl8k_priv *priv = hw->priv;
5799 int rc;
5800 int count = MAX_RESTART_ATTEMPTS;
5801
5802 retry:
5803 /* Reset firmware and hardware */
5804 mwl8k_hw_reset(priv);
5805
5806 /* Ask userland hotplug daemon for the device firmware */
5807 rc = mwl8k_request_firmware(priv, fw_image, nowait);
5808 if (rc) {
5809 wiphy_err(hw->wiphy, "Firmware files not found\n");
5810 return rc;
5811 }
5812
5813 if (nowait)
5814 return rc;
5815
5816 /* Load firmware into hardware */
5817 rc = mwl8k_load_firmware(hw);
5818 if (rc)
5819 wiphy_err(hw->wiphy, "Cannot start firmware\n");
5820
5821 /* Reclaim memory once firmware is successfully loaded */
5822 mwl8k_release_firmware(priv);
5823
5824 if (rc && count) {
5825 /* FW did not start successfully;
5826 * lets try one more time
5827 */
5828 count--;
5829 wiphy_err(hw->wiphy, "Trying to reload the firmware again\n");
5830 msleep(20);
5831 goto retry;
5832 }
5833
5834 return rc;
5835 }
5836
mwl8k_init_txqs(struct ieee80211_hw * hw)5837 static int mwl8k_init_txqs(struct ieee80211_hw *hw)
5838 {
5839 struct mwl8k_priv *priv = hw->priv;
5840 int rc = 0;
5841 int i;
5842
5843 for (i = 0; i < mwl8k_tx_queues(priv); i++) {
5844 rc = mwl8k_txq_init(hw, i);
5845 if (rc)
5846 break;
5847 if (priv->ap_fw)
5848 iowrite32(priv->txq[i].txd_dma,
5849 priv->sram + priv->txq_offset[i]);
5850 }
5851 return rc;
5852 }
5853
5854 /* initialize hw after successfully loading a firmware image */
mwl8k_probe_hw(struct ieee80211_hw * hw)5855 static int mwl8k_probe_hw(struct ieee80211_hw *hw)
5856 {
5857 struct mwl8k_priv *priv = hw->priv;
5858 int rc = 0;
5859 int i;
5860
5861 if (priv->ap_fw) {
5862 priv->rxd_ops = priv->device_info->ap_rxd_ops;
5863 if (priv->rxd_ops == NULL) {
5864 wiphy_err(hw->wiphy,
5865 "Driver does not have AP firmware image support for this hardware\n");
5866 rc = -ENOENT;
5867 goto err_stop_firmware;
5868 }
5869 } else {
5870 priv->rxd_ops = &rxd_sta_ops;
5871 }
5872
5873 priv->sniffer_enabled = false;
5874 priv->wmm_enabled = false;
5875 priv->pending_tx_pkts = 0;
5876 atomic_set(&priv->watchdog_event_pending, 0);
5877
5878 rc = mwl8k_rxq_init(hw, 0);
5879 if (rc)
5880 goto err_stop_firmware;
5881 rxq_refill(hw, 0, INT_MAX);
5882
5883 /* For the sta firmware, we need to know the dma addresses of tx queues
5884 * before sending MWL8K_CMD_GET_HW_SPEC. So we must initialize them
5885 * prior to issuing this command. But for the AP case, we learn the
5886 * total number of queues from the result CMD_GET_HW_SPEC, so for this
5887 * case we must initialize the tx queues after.
5888 */
5889 priv->num_ampdu_queues = 0;
5890 if (!priv->ap_fw) {
5891 rc = mwl8k_init_txqs(hw);
5892 if (rc)
5893 goto err_free_queues;
5894 }
5895
5896 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
5897 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5898 iowrite32(MWL8K_A2H_INT_TX_DONE|MWL8K_A2H_INT_RX_READY|
5899 MWL8K_A2H_INT_BA_WATCHDOG,
5900 priv->regs + MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL);
5901 iowrite32(MWL8K_A2H_INT_OPC_DONE,
5902 priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
5903
5904 rc = request_irq(priv->pdev->irq, mwl8k_interrupt,
5905 IRQF_SHARED, MWL8K_NAME, hw);
5906 if (rc) {
5907 wiphy_err(hw->wiphy, "failed to register IRQ handler\n");
5908 goto err_free_queues;
5909 }
5910
5911 /*
5912 * When hw restart is requested,
5913 * mac80211 will take care of clearing
5914 * the ampdu streams, so do not clear
5915 * the ampdu state here
5916 */
5917 if (!priv->hw_restart_in_progress)
5918 memset(priv->ampdu, 0, sizeof(priv->ampdu));
5919
5920 /*
5921 * Temporarily enable interrupts. Initial firmware host
5922 * commands use interrupts and avoid polling. Disable
5923 * interrupts when done.
5924 */
5925 iowrite32(MWL8K_A2H_EVENTS, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5926
5927 /* Get config data, mac addrs etc */
5928 if (priv->ap_fw) {
5929 rc = mwl8k_cmd_get_hw_spec_ap(hw);
5930 if (!rc)
5931 rc = mwl8k_init_txqs(hw);
5932 if (!rc)
5933 rc = mwl8k_cmd_set_hw_spec(hw);
5934 } else {
5935 rc = mwl8k_cmd_get_hw_spec_sta(hw);
5936 }
5937 if (rc) {
5938 wiphy_err(hw->wiphy, "Cannot initialise firmware\n");
5939 goto err_free_irq;
5940 }
5941
5942 /* Turn radio off */
5943 rc = mwl8k_cmd_radio_disable(hw);
5944 if (rc) {
5945 wiphy_err(hw->wiphy, "Cannot disable\n");
5946 goto err_free_irq;
5947 }
5948
5949 /* Clear MAC address */
5950 rc = mwl8k_cmd_set_mac_addr(hw, NULL, "\x00\x00\x00\x00\x00\x00");
5951 if (rc) {
5952 wiphy_err(hw->wiphy, "Cannot clear MAC address\n");
5953 goto err_free_irq;
5954 }
5955
5956 /* Configure Antennas */
5957 rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_RX, 0x3);
5958 if (rc)
5959 wiphy_warn(hw->wiphy, "failed to set # of RX antennas");
5960 rc = mwl8k_cmd_rf_antenna(hw, MWL8K_RF_ANTENNA_TX, 0x7);
5961 if (rc)
5962 wiphy_warn(hw->wiphy, "failed to set # of TX antennas");
5963
5964
5965 /* Disable interrupts */
5966 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5967 free_irq(priv->pdev->irq, hw);
5968
5969 wiphy_info(hw->wiphy, "%s v%d, %pm, %s firmware %u.%u.%u.%u\n",
5970 priv->device_info->part_name,
5971 priv->hw_rev, hw->wiphy->perm_addr,
5972 priv->ap_fw ? "AP" : "STA",
5973 (priv->fw_rev >> 24) & 0xff, (priv->fw_rev >> 16) & 0xff,
5974 (priv->fw_rev >> 8) & 0xff, priv->fw_rev & 0xff);
5975
5976 return 0;
5977
5978 err_free_irq:
5979 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
5980 free_irq(priv->pdev->irq, hw);
5981
5982 err_free_queues:
5983 for (i = 0; i < mwl8k_tx_queues(priv); i++)
5984 mwl8k_txq_deinit(hw, i);
5985 mwl8k_rxq_deinit(hw, 0);
5986
5987 err_stop_firmware:
5988 mwl8k_hw_reset(priv);
5989
5990 return rc;
5991 }
5992
5993 /*
5994 * invoke mwl8k_reload_firmware to change the firmware image after the device
5995 * has already been registered
5996 */
mwl8k_reload_firmware(struct ieee80211_hw * hw,char * fw_image)5997 static int mwl8k_reload_firmware(struct ieee80211_hw *hw, char *fw_image)
5998 {
5999 int i, rc = 0;
6000 struct mwl8k_priv *priv = hw->priv;
6001 struct mwl8k_vif *vif, *tmp_vif;
6002
6003 mwl8k_stop(hw);
6004 mwl8k_rxq_deinit(hw, 0);
6005
6006 /*
6007 * All the existing interfaces are re-added by the ieee80211_reconfig;
6008 * which means driver should remove existing interfaces before calling
6009 * ieee80211_restart_hw
6010 */
6011 if (priv->hw_restart_in_progress)
6012 list_for_each_entry_safe(vif, tmp_vif, &priv->vif_list, list)
6013 mwl8k_remove_vif(priv, vif);
6014
6015 for (i = 0; i < mwl8k_tx_queues(priv); i++)
6016 mwl8k_txq_deinit(hw, i);
6017
6018 rc = mwl8k_init_firmware(hw, fw_image, false);
6019 if (rc)
6020 goto fail;
6021
6022 rc = mwl8k_probe_hw(hw);
6023 if (rc)
6024 goto fail;
6025
6026 if (priv->hw_restart_in_progress)
6027 return rc;
6028
6029 rc = mwl8k_start(hw);
6030 if (rc)
6031 goto fail;
6032
6033 rc = mwl8k_config(hw, ~0);
6034 if (rc)
6035 goto fail;
6036
6037 for (i = 0; i < MWL8K_TX_WMM_QUEUES; i++) {
6038 rc = mwl8k_conf_tx(hw, NULL, i, &priv->wmm_params[i]);
6039 if (rc)
6040 goto fail;
6041 }
6042
6043 return rc;
6044
6045 fail:
6046 printk(KERN_WARNING "mwl8k: Failed to reload firmware image.\n");
6047 return rc;
6048 }
6049
6050 static const struct ieee80211_iface_limit ap_if_limits[] = {
6051 { .max = 8, .types = BIT(NL80211_IFTYPE_AP) },
6052 { .max = 1, .types = BIT(NL80211_IFTYPE_STATION) },
6053 };
6054
6055 static const struct ieee80211_iface_combination ap_if_comb = {
6056 .limits = ap_if_limits,
6057 .n_limits = ARRAY_SIZE(ap_if_limits),
6058 .max_interfaces = 8,
6059 .num_different_channels = 1,
6060 };
6061
6062
mwl8k_firmware_load_success(struct mwl8k_priv * priv)6063 static int mwl8k_firmware_load_success(struct mwl8k_priv *priv)
6064 {
6065 struct ieee80211_hw *hw = priv->hw;
6066 int i, rc;
6067
6068 rc = mwl8k_load_firmware(hw);
6069 mwl8k_release_firmware(priv);
6070 if (rc) {
6071 wiphy_err(hw->wiphy, "Cannot start firmware\n");
6072 return rc;
6073 }
6074
6075 /*
6076 * Extra headroom is the size of the required DMA header
6077 * minus the size of the smallest 802.11 frame (CTS frame).
6078 */
6079 hw->extra_tx_headroom =
6080 sizeof(struct mwl8k_dma_data) - sizeof(struct ieee80211_cts);
6081
6082 hw->extra_tx_headroom -= priv->ap_fw ? REDUCED_TX_HEADROOM : 0;
6083
6084 hw->queues = MWL8K_TX_WMM_QUEUES;
6085
6086 /* Set rssi values to dBm */
6087 ieee80211_hw_set(hw, SIGNAL_DBM);
6088 ieee80211_hw_set(hw, HAS_RATE_CONTROL);
6089
6090 /*
6091 * Ask mac80211 to not to trigger PS mode
6092 * based on PM bit of incoming frames.
6093 */
6094 if (priv->ap_fw)
6095 ieee80211_hw_set(hw, AP_LINK_PS);
6096
6097 hw->vif_data_size = sizeof(struct mwl8k_vif);
6098 hw->sta_data_size = sizeof(struct mwl8k_sta);
6099
6100 priv->macids_used = 0;
6101 INIT_LIST_HEAD(&priv->vif_list);
6102
6103 /* Set default radio state and preamble */
6104 priv->radio_on = false;
6105 priv->radio_short_preamble = false;
6106
6107 /* Finalize join worker */
6108 INIT_WORK(&priv->finalize_join_worker, mwl8k_finalize_join_worker);
6109 /* Handle watchdog ba events */
6110 INIT_WORK(&priv->watchdog_ba_handle, mwl8k_watchdog_ba_events);
6111 /* To reload the firmware if it crashes */
6112 INIT_WORK(&priv->fw_reload, mwl8k_hw_restart_work);
6113
6114 /* TX reclaim and RX tasklets. */
6115 tasklet_init(&priv->poll_tx_task, mwl8k_tx_poll, (unsigned long)hw);
6116 tasklet_disable(&priv->poll_tx_task);
6117 tasklet_init(&priv->poll_rx_task, mwl8k_rx_poll, (unsigned long)hw);
6118 tasklet_disable(&priv->poll_rx_task);
6119
6120 /* Power management cookie */
6121 priv->cookie = pci_alloc_consistent(priv->pdev, 4, &priv->cookie_dma);
6122 if (priv->cookie == NULL)
6123 return -ENOMEM;
6124
6125 mutex_init(&priv->fw_mutex);
6126 priv->fw_mutex_owner = NULL;
6127 priv->fw_mutex_depth = 0;
6128 priv->hostcmd_wait = NULL;
6129
6130 spin_lock_init(&priv->tx_lock);
6131
6132 spin_lock_init(&priv->stream_lock);
6133
6134 priv->tx_wait = NULL;
6135
6136 rc = mwl8k_probe_hw(hw);
6137 if (rc)
6138 goto err_free_cookie;
6139
6140 hw->wiphy->interface_modes = 0;
6141
6142 if (priv->ap_macids_supported || priv->device_info->fw_image_ap) {
6143 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP);
6144 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION);
6145 hw->wiphy->iface_combinations = &ap_if_comb;
6146 hw->wiphy->n_iface_combinations = 1;
6147 }
6148
6149 if (priv->sta_macids_supported || priv->device_info->fw_image_sta)
6150 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_STATION);
6151
6152 wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
6153
6154 rc = ieee80211_register_hw(hw);
6155 if (rc) {
6156 wiphy_err(hw->wiphy, "Cannot register device\n");
6157 goto err_unprobe_hw;
6158 }
6159
6160 return 0;
6161
6162 err_unprobe_hw:
6163 for (i = 0; i < mwl8k_tx_queues(priv); i++)
6164 mwl8k_txq_deinit(hw, i);
6165 mwl8k_rxq_deinit(hw, 0);
6166
6167 err_free_cookie:
6168 if (priv->cookie != NULL)
6169 pci_free_consistent(priv->pdev, 4,
6170 priv->cookie, priv->cookie_dma);
6171
6172 return rc;
6173 }
mwl8k_probe(struct pci_dev * pdev,const struct pci_device_id * id)6174 static int mwl8k_probe(struct pci_dev *pdev,
6175 const struct pci_device_id *id)
6176 {
6177 static int printed_version;
6178 struct ieee80211_hw *hw;
6179 struct mwl8k_priv *priv;
6180 struct mwl8k_device_info *di;
6181 int rc;
6182
6183 if (!printed_version) {
6184 printk(KERN_INFO "%s version %s\n", MWL8K_DESC, MWL8K_VERSION);
6185 printed_version = 1;
6186 }
6187
6188
6189 rc = pci_enable_device(pdev);
6190 if (rc) {
6191 printk(KERN_ERR "%s: Cannot enable new PCI device\n",
6192 MWL8K_NAME);
6193 return rc;
6194 }
6195
6196 rc = pci_request_regions(pdev, MWL8K_NAME);
6197 if (rc) {
6198 printk(KERN_ERR "%s: Cannot obtain PCI resources\n",
6199 MWL8K_NAME);
6200 goto err_disable_device;
6201 }
6202
6203 pci_set_master(pdev);
6204
6205
6206 hw = ieee80211_alloc_hw(sizeof(*priv), &mwl8k_ops);
6207 if (hw == NULL) {
6208 printk(KERN_ERR "%s: ieee80211 alloc failed\n", MWL8K_NAME);
6209 rc = -ENOMEM;
6210 goto err_free_reg;
6211 }
6212
6213 SET_IEEE80211_DEV(hw, &pdev->dev);
6214 pci_set_drvdata(pdev, hw);
6215
6216 priv = hw->priv;
6217 priv->hw = hw;
6218 priv->pdev = pdev;
6219 priv->device_info = &mwl8k_info_tbl[id->driver_data];
6220
6221 if (id->driver_data == MWL8764)
6222 priv->is_8764 = true;
6223
6224 priv->sram = pci_iomap(pdev, 0, 0x10000);
6225 if (priv->sram == NULL) {
6226 wiphy_err(hw->wiphy, "Cannot map device SRAM\n");
6227 rc = -EIO;
6228 goto err_iounmap;
6229 }
6230
6231 /*
6232 * If BAR0 is a 32 bit BAR, the register BAR will be BAR1.
6233 * If BAR0 is a 64 bit BAR, the register BAR will be BAR2.
6234 */
6235 priv->regs = pci_iomap(pdev, 1, 0x10000);
6236 if (priv->regs == NULL) {
6237 priv->regs = pci_iomap(pdev, 2, 0x10000);
6238 if (priv->regs == NULL) {
6239 wiphy_err(hw->wiphy, "Cannot map device registers\n");
6240 rc = -EIO;
6241 goto err_iounmap;
6242 }
6243 }
6244
6245 /*
6246 * Choose the initial fw image depending on user input. If a second
6247 * image is available, make it the alternative image that will be
6248 * loaded if the first one fails.
6249 */
6250 init_completion(&priv->firmware_loading_complete);
6251 di = priv->device_info;
6252 if (ap_mode_default && di->fw_image_ap) {
6253 priv->fw_pref = di->fw_image_ap;
6254 priv->fw_alt = di->fw_image_sta;
6255 } else if (!ap_mode_default && di->fw_image_sta) {
6256 priv->fw_pref = di->fw_image_sta;
6257 priv->fw_alt = di->fw_image_ap;
6258 } else if (ap_mode_default && !di->fw_image_ap && di->fw_image_sta) {
6259 printk(KERN_WARNING "AP fw is unavailable. Using STA fw.");
6260 priv->fw_pref = di->fw_image_sta;
6261 } else if (!ap_mode_default && !di->fw_image_sta && di->fw_image_ap) {
6262 printk(KERN_WARNING "STA fw is unavailable. Using AP fw.");
6263 priv->fw_pref = di->fw_image_ap;
6264 }
6265 rc = mwl8k_init_firmware(hw, priv->fw_pref, true);
6266 if (rc)
6267 goto err_stop_firmware;
6268
6269 priv->hw_restart_in_progress = false;
6270
6271 priv->running_bsses = 0;
6272
6273 return rc;
6274
6275 err_stop_firmware:
6276 mwl8k_hw_reset(priv);
6277
6278 err_iounmap:
6279 if (priv->regs != NULL)
6280 pci_iounmap(pdev, priv->regs);
6281
6282 if (priv->sram != NULL)
6283 pci_iounmap(pdev, priv->sram);
6284
6285 ieee80211_free_hw(hw);
6286
6287 err_free_reg:
6288 pci_release_regions(pdev);
6289
6290 err_disable_device:
6291 pci_disable_device(pdev);
6292
6293 return rc;
6294 }
6295
mwl8k_remove(struct pci_dev * pdev)6296 static void mwl8k_remove(struct pci_dev *pdev)
6297 {
6298 struct ieee80211_hw *hw = pci_get_drvdata(pdev);
6299 struct mwl8k_priv *priv;
6300 int i;
6301
6302 if (hw == NULL)
6303 return;
6304 priv = hw->priv;
6305
6306 wait_for_completion(&priv->firmware_loading_complete);
6307
6308 if (priv->fw_state == FW_STATE_ERROR) {
6309 mwl8k_hw_reset(priv);
6310 goto unmap;
6311 }
6312
6313 ieee80211_stop_queues(hw);
6314
6315 ieee80211_unregister_hw(hw);
6316
6317 /* Remove TX reclaim and RX tasklets. */
6318 tasklet_kill(&priv->poll_tx_task);
6319 tasklet_kill(&priv->poll_rx_task);
6320
6321 /* Stop hardware */
6322 mwl8k_hw_reset(priv);
6323
6324 /* Return all skbs to mac80211 */
6325 for (i = 0; i < mwl8k_tx_queues(priv); i++)
6326 mwl8k_txq_reclaim(hw, i, INT_MAX, 1);
6327
6328 for (i = 0; i < mwl8k_tx_queues(priv); i++)
6329 mwl8k_txq_deinit(hw, i);
6330
6331 mwl8k_rxq_deinit(hw, 0);
6332
6333 pci_free_consistent(priv->pdev, 4, priv->cookie, priv->cookie_dma);
6334
6335 unmap:
6336 pci_iounmap(pdev, priv->regs);
6337 pci_iounmap(pdev, priv->sram);
6338 ieee80211_free_hw(hw);
6339 pci_release_regions(pdev);
6340 pci_disable_device(pdev);
6341 }
6342
6343 static struct pci_driver mwl8k_driver = {
6344 .name = MWL8K_NAME,
6345 .id_table = mwl8k_pci_id_table,
6346 .probe = mwl8k_probe,
6347 .remove = mwl8k_remove,
6348 };
6349
6350 module_pci_driver(mwl8k_driver);
6351
6352 MODULE_DESCRIPTION(MWL8K_DESC);
6353 MODULE_VERSION(MWL8K_VERSION);
6354 MODULE_AUTHOR("Lennert Buytenhek <buytenh@marvell.com>");
6355 MODULE_LICENSE("GPL");
6356
