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mac80211: allow configure_filter callback to sleep
[deliverable/linux.git] / drivers / net / wireless / mwl8k.c
1 /*
2 * drivers/net/wireless/mwl8k.c driver for Marvell TOPDOG 802.11 Wireless cards
3 *
4 * Copyright (C) 2008 Marvell Semiconductor Inc.
5 *
6 * This file is licensed under the terms of the GNU General Public
7 * License version 2. This program is licensed "as is" without any
8 * warranty of any kind, whether express or implied.
9 */
10
11 #include <linux/init.h>
12 #include <linux/module.h>
13 #include <linux/kernel.h>
14 #include <linux/spinlock.h>
15 #include <linux/list.h>
16 #include <linux/pci.h>
17 #include <linux/delay.h>
18 #include <linux/completion.h>
19 #include <linux/etherdevice.h>
20 #include <net/mac80211.h>
21 #include <linux/moduleparam.h>
22 #include <linux/firmware.h>
23 #include <linux/workqueue.h>
24
25 #define MWL8K_DESC "Marvell TOPDOG(R) 802.11 Wireless Network Driver"
26 #define MWL8K_NAME KBUILD_MODNAME
27 #define MWL8K_VERSION "0.9.1"
28
29 MODULE_DESCRIPTION(MWL8K_DESC);
30 MODULE_VERSION(MWL8K_VERSION);
31 MODULE_AUTHOR("Lennert Buytenhek <buytenh@marvell.com>");
32 MODULE_LICENSE("GPL");
33
34 static DEFINE_PCI_DEVICE_TABLE(mwl8k_table) = {
35 { PCI_VDEVICE(MARVELL, 0x2a2b), .driver_data = 8687, },
36 { PCI_VDEVICE(MARVELL, 0x2a30), .driver_data = 8687, },
37 { }
38 };
39 MODULE_DEVICE_TABLE(pci, mwl8k_table);
40
41 #define IEEE80211_ADDR_LEN ETH_ALEN
42
43 /* Register definitions */
44 #define MWL8K_HIU_GEN_PTR 0x00000c10
45 #define MWL8K_MODE_STA 0x0000005a
46 #define MWL8K_MODE_AP 0x000000a5
47 #define MWL8K_HIU_INT_CODE 0x00000c14
48 #define MWL8K_FWSTA_READY 0xf0f1f2f4
49 #define MWL8K_FWAP_READY 0xf1f2f4a5
50 #define MWL8K_INT_CODE_CMD_FINISHED 0x00000005
51 #define MWL8K_HIU_SCRATCH 0x00000c40
52
53 /* Host->device communications */
54 #define MWL8K_HIU_H2A_INTERRUPT_EVENTS 0x00000c18
55 #define MWL8K_HIU_H2A_INTERRUPT_STATUS 0x00000c1c
56 #define MWL8K_HIU_H2A_INTERRUPT_MASK 0x00000c20
57 #define MWL8K_HIU_H2A_INTERRUPT_CLEAR_SEL 0x00000c24
58 #define MWL8K_HIU_H2A_INTERRUPT_STATUS_MASK 0x00000c28
59 #define MWL8K_H2A_INT_DUMMY (1 << 20)
60 #define MWL8K_H2A_INT_RESET (1 << 15)
61 #define MWL8K_H2A_INT_PS (1 << 2)
62 #define MWL8K_H2A_INT_DOORBELL (1 << 1)
63 #define MWL8K_H2A_INT_PPA_READY (1 << 0)
64
65 /* Device->host communications */
66 #define MWL8K_HIU_A2H_INTERRUPT_EVENTS 0x00000c2c
67 #define MWL8K_HIU_A2H_INTERRUPT_STATUS 0x00000c30
68 #define MWL8K_HIU_A2H_INTERRUPT_MASK 0x00000c34
69 #define MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL 0x00000c38
70 #define MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK 0x00000c3c
71 #define MWL8K_A2H_INT_DUMMY (1 << 20)
72 #define MWL8K_A2H_INT_CHNL_SWITCHED (1 << 11)
73 #define MWL8K_A2H_INT_QUEUE_EMPTY (1 << 10)
74 #define MWL8K_A2H_INT_RADAR_DETECT (1 << 7)
75 #define MWL8K_A2H_INT_RADIO_ON (1 << 6)
76 #define MWL8K_A2H_INT_RADIO_OFF (1 << 5)
77 #define MWL8K_A2H_INT_MAC_EVENT (1 << 3)
78 #define MWL8K_A2H_INT_OPC_DONE (1 << 2)
79 #define MWL8K_A2H_INT_RX_READY (1 << 1)
80 #define MWL8K_A2H_INT_TX_DONE (1 << 0)
81
82 #define MWL8K_A2H_EVENTS (MWL8K_A2H_INT_DUMMY | \
83 MWL8K_A2H_INT_CHNL_SWITCHED | \
84 MWL8K_A2H_INT_QUEUE_EMPTY | \
85 MWL8K_A2H_INT_RADAR_DETECT | \
86 MWL8K_A2H_INT_RADIO_ON | \
87 MWL8K_A2H_INT_RADIO_OFF | \
88 MWL8K_A2H_INT_MAC_EVENT | \
89 MWL8K_A2H_INT_OPC_DONE | \
90 MWL8K_A2H_INT_RX_READY | \
91 MWL8K_A2H_INT_TX_DONE)
92
93 /* WME stream classes */
94 #define WME_AC_BE 0 /* best effort */
95 #define WME_AC_BK 1 /* background */
96 #define WME_AC_VI 2 /* video */
97 #define WME_AC_VO 3 /* voice */
98
99 #define MWL8K_RX_QUEUES 1
100 #define MWL8K_TX_QUEUES 4
101
102 struct mwl8k_rx_queue {
103 int rx_desc_count;
104
105 /* hw receives here */
106 int rx_head;
107
108 /* refill descs here */
109 int rx_tail;
110
111 struct mwl8k_rx_desc *rx_desc_area;
112 dma_addr_t rx_desc_dma;
113 struct sk_buff **rx_skb;
114 };
115
116 struct mwl8k_skb {
117 /*
118 * The DMA engine requires a modification to the payload.
119 * If the skbuff is shared/cloned, it needs to be unshared.
120 * This method is used to ensure the stack always gets back
121 * the skbuff it sent for transmission.
122 */
123 struct sk_buff *clone;
124 struct sk_buff *skb;
125 };
126
127 struct mwl8k_tx_queue {
128 /* hw transmits here */
129 int tx_head;
130
131 /* sw appends here */
132 int tx_tail;
133
134 struct ieee80211_tx_queue_stats tx_stats;
135 struct mwl8k_tx_desc *tx_desc_area;
136 dma_addr_t tx_desc_dma;
137 struct mwl8k_skb *tx_skb;
138 };
139
140 /* Pointers to the firmware data and meta information about it. */
141 struct mwl8k_firmware {
142 /* Microcode */
143 struct firmware *ucode;
144
145 /* Boot helper code */
146 struct firmware *helper;
147 };
148
149 struct mwl8k_priv {
150 void __iomem *regs;
151 struct ieee80211_hw *hw;
152
153 struct pci_dev *pdev;
154 u8 name[16];
155 /* firmware access lock */
156 spinlock_t fw_lock;
157
158 /* firmware files and meta data */
159 struct mwl8k_firmware fw;
160 u32 part_num;
161
162 /* lock held over TX and TX reap */
163 spinlock_t tx_lock;
164 u32 int_mask;
165
166 struct ieee80211_vif *vif;
167 struct list_head vif_list;
168
169 struct ieee80211_channel *current_channel;
170
171 /* power management status cookie from firmware */
172 u32 *cookie;
173 dma_addr_t cookie_dma;
174
175 u16 num_mcaddrs;
176 u16 region_code;
177 u8 hw_rev;
178 __le32 fw_rev;
179 u32 wep_enabled;
180
181 /*
182 * Running count of TX packets in flight, to avoid
183 * iterating over the transmit rings each time.
184 */
185 int pending_tx_pkts;
186
187 struct mwl8k_rx_queue rxq[MWL8K_RX_QUEUES];
188 struct mwl8k_tx_queue txq[MWL8K_TX_QUEUES];
189
190 /* PHY parameters */
191 struct ieee80211_supported_band band;
192 struct ieee80211_channel channels[14];
193 struct ieee80211_rate rates[12];
194
195 /* RF preamble: Short, Long or Auto */
196 u8 radio_preamble;
197 u8 radio_state;
198
199 /* WMM MODE 1 for enabled; 0 for disabled */
200 bool wmm_mode;
201
202 /* Set if PHY config is in progress */
203 bool inconfig;
204
205 /* XXX need to convert this to handle multiple interfaces */
206 bool capture_beacon;
207 u8 capture_bssid[IEEE80211_ADDR_LEN];
208 struct sk_buff *beacon_skb;
209
210 /*
211 * This FJ worker has to be global as it is scheduled from the
212 * RX handler. At this point we don't know which interface it
213 * belongs to until the list of bssids waiting to complete join
214 * is checked.
215 */
216 struct work_struct finalize_join_worker;
217
218 /* Tasklet to reclaim TX descriptors and buffers after tx */
219 struct tasklet_struct tx_reclaim_task;
220
221 /* Work thread to serialize configuration requests */
222 struct workqueue_struct *config_wq;
223 struct completion *hostcmd_wait;
224 struct completion *tx_wait;
225 };
226
227 /* Per interface specific private data */
228 struct mwl8k_vif {
229 struct list_head node;
230
231 /* backpointer to parent config block */
232 struct mwl8k_priv *priv;
233
234 /* BSS config of AP or IBSS from mac80211*/
235 struct ieee80211_bss_conf bss_info;
236
237 /* BSSID of AP or IBSS */
238 u8 bssid[IEEE80211_ADDR_LEN];
239 u8 mac_addr[IEEE80211_ADDR_LEN];
240
241 /*
242 * Subset of supported legacy rates.
243 * Intersection of AP and STA supported rates.
244 */
245 struct ieee80211_rate legacy_rates[12];
246
247 /* number of supported legacy rates */
248 u8 legacy_nrates;
249
250 /* Number of supported MCS rates. Work in progress */
251 u8 mcs_nrates;
252
253 /* Index into station database.Returned by update_sta_db call */
254 u8 peer_id;
255
256 /* Non AMPDU sequence number assigned by driver */
257 u16 seqno;
258
259 /* Note:There is no channel info,
260 * refer to the master channel info in priv
261 */
262 };
263
264 #define MWL8K_VIF(_vif) ((struct mwl8k_vif *)&((_vif)->drv_priv))
265
266 static const struct ieee80211_channel mwl8k_channels[] = {
267 { .center_freq = 2412, .hw_value = 1, },
268 { .center_freq = 2417, .hw_value = 2, },
269 { .center_freq = 2422, .hw_value = 3, },
270 { .center_freq = 2427, .hw_value = 4, },
271 { .center_freq = 2432, .hw_value = 5, },
272 { .center_freq = 2437, .hw_value = 6, },
273 { .center_freq = 2442, .hw_value = 7, },
274 { .center_freq = 2447, .hw_value = 8, },
275 { .center_freq = 2452, .hw_value = 9, },
276 { .center_freq = 2457, .hw_value = 10, },
277 { .center_freq = 2462, .hw_value = 11, },
278 };
279
280 static const struct ieee80211_rate mwl8k_rates[] = {
281 { .bitrate = 10, .hw_value = 2, },
282 { .bitrate = 20, .hw_value = 4, },
283 { .bitrate = 55, .hw_value = 11, },
284 { .bitrate = 60, .hw_value = 12, },
285 { .bitrate = 90, .hw_value = 18, },
286 { .bitrate = 110, .hw_value = 22, },
287 { .bitrate = 120, .hw_value = 24, },
288 { .bitrate = 180, .hw_value = 36, },
289 { .bitrate = 240, .hw_value = 48, },
290 { .bitrate = 360, .hw_value = 72, },
291 { .bitrate = 480, .hw_value = 96, },
292 { .bitrate = 540, .hw_value = 108, },
293 };
294
295 /* Radio settings */
296 #define MWL8K_RADIO_FORCE 0x2
297 #define MWL8K_RADIO_ENABLE 0x1
298 #define MWL8K_RADIO_DISABLE 0x0
299 #define MWL8K_RADIO_AUTO_PREAMBLE 0x0005
300 #define MWL8K_RADIO_SHORT_PREAMBLE 0x0003
301 #define MWL8K_RADIO_LONG_PREAMBLE 0x0001
302
303 /* WMM */
304 #define MWL8K_WMM_ENABLE 1
305 #define MWL8K_WMM_DISABLE 0
306
307 #define MWL8K_RADIO_DEFAULT_PREAMBLE MWL8K_RADIO_LONG_PREAMBLE
308
309 /* Slot time */
310
311 /* Short Slot: 9us slot time */
312 #define MWL8K_SHORT_SLOTTIME 1
313
314 /* Long slot: 20us slot time */
315 #define MWL8K_LONG_SLOTTIME 0
316
317 /* Set or get info from Firmware */
318 #define MWL8K_CMD_SET 0x0001
319 #define MWL8K_CMD_GET 0x0000
320
321 /* Firmware command codes */
322 #define MWL8K_CMD_CODE_DNLD 0x0001
323 #define MWL8K_CMD_GET_HW_SPEC 0x0003
324 #define MWL8K_CMD_MAC_MULTICAST_ADR 0x0010
325 #define MWL8K_CMD_GET_STAT 0x0014
326 #define MWL8K_CMD_RADIO_CONTROL 0x001C
327 #define MWL8K_CMD_RF_TX_POWER 0x001E
328 #define MWL8K_CMD_SET_PRE_SCAN 0x0107
329 #define MWL8K_CMD_SET_POST_SCAN 0x0108
330 #define MWL8K_CMD_SET_RF_CHANNEL 0x010A
331 #define MWL8K_CMD_SET_SLOT 0x0114
332 #define MWL8K_CMD_MIMO_CONFIG 0x0125
333 #define MWL8K_CMD_ENABLE_SNIFFER 0x0150
334 #define MWL8K_CMD_SET_WMM_MODE 0x0123
335 #define MWL8K_CMD_SET_EDCA_PARAMS 0x0115
336 #define MWL8K_CMD_SET_FINALIZE_JOIN 0x0111
337 #define MWL8K_CMD_UPDATE_STADB 0x1123
338 #define MWL8K_CMD_SET_RATEADAPT_MODE 0x0203
339 #define MWL8K_CMD_SET_LINKADAPT_MODE 0x0129
340 #define MWL8K_CMD_SET_AID 0x010d
341 #define MWL8K_CMD_SET_RATE 0x0110
342 #define MWL8K_CMD_USE_FIXED_RATE 0x0126
343 #define MWL8K_CMD_RTS_THRESHOLD 0x0113
344 #define MWL8K_CMD_ENCRYPTION 0x1122
345
346 static const char *mwl8k_cmd_name(u16 cmd, char *buf, int bufsize)
347 {
348 #define MWL8K_CMDNAME(x) case MWL8K_CMD_##x: do {\
349 snprintf(buf, bufsize, "%s", #x);\
350 return buf;\
351 } while (0)
352 switch (cmd & (~0x8000)) {
353 MWL8K_CMDNAME(CODE_DNLD);
354 MWL8K_CMDNAME(GET_HW_SPEC);
355 MWL8K_CMDNAME(MAC_MULTICAST_ADR);
356 MWL8K_CMDNAME(GET_STAT);
357 MWL8K_CMDNAME(RADIO_CONTROL);
358 MWL8K_CMDNAME(RF_TX_POWER);
359 MWL8K_CMDNAME(SET_PRE_SCAN);
360 MWL8K_CMDNAME(SET_POST_SCAN);
361 MWL8K_CMDNAME(SET_RF_CHANNEL);
362 MWL8K_CMDNAME(SET_SLOT);
363 MWL8K_CMDNAME(MIMO_CONFIG);
364 MWL8K_CMDNAME(ENABLE_SNIFFER);
365 MWL8K_CMDNAME(SET_WMM_MODE);
366 MWL8K_CMDNAME(SET_EDCA_PARAMS);
367 MWL8K_CMDNAME(SET_FINALIZE_JOIN);
368 MWL8K_CMDNAME(UPDATE_STADB);
369 MWL8K_CMDNAME(SET_RATEADAPT_MODE);
370 MWL8K_CMDNAME(SET_LINKADAPT_MODE);
371 MWL8K_CMDNAME(SET_AID);
372 MWL8K_CMDNAME(SET_RATE);
373 MWL8K_CMDNAME(USE_FIXED_RATE);
374 MWL8K_CMDNAME(RTS_THRESHOLD);
375 MWL8K_CMDNAME(ENCRYPTION);
376 default:
377 snprintf(buf, bufsize, "0x%x", cmd);
378 }
379 #undef MWL8K_CMDNAME
380
381 return buf;
382 }
383
384 /* Hardware and firmware reset */
385 static void mwl8k_hw_reset(struct mwl8k_priv *priv)
386 {
387 iowrite32(MWL8K_H2A_INT_RESET,
388 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
389 iowrite32(MWL8K_H2A_INT_RESET,
390 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
391 msleep(20);
392 }
393
394 /* Release fw image */
395 static void mwl8k_release_fw(struct firmware **fw)
396 {
397 if (*fw == NULL)
398 return;
399 release_firmware(*fw);
400 *fw = NULL;
401 }
402
403 static void mwl8k_release_firmware(struct mwl8k_priv *priv)
404 {
405 mwl8k_release_fw(&priv->fw.ucode);
406 mwl8k_release_fw(&priv->fw.helper);
407 }
408
409 /* Request fw image */
410 static int mwl8k_request_fw(struct mwl8k_priv *priv,
411 const char *fname, struct firmware **fw)
412 {
413 /* release current image */
414 if (*fw != NULL)
415 mwl8k_release_fw(fw);
416
417 return request_firmware((const struct firmware **)fw,
418 fname, &priv->pdev->dev);
419 }
420
421 static int mwl8k_request_firmware(struct mwl8k_priv *priv, u32 part_num)
422 {
423 u8 filename[64];
424 int rc;
425
426 priv->part_num = part_num;
427
428 snprintf(filename, sizeof(filename),
429 "mwl8k/helper_%u.fw", priv->part_num);
430
431 rc = mwl8k_request_fw(priv, filename, &priv->fw.helper);
432 if (rc) {
433 printk(KERN_ERR
434 "%s Error requesting helper firmware file %s\n",
435 pci_name(priv->pdev), filename);
436 return rc;
437 }
438
439 snprintf(filename, sizeof(filename),
440 "mwl8k/fmimage_%u.fw", priv->part_num);
441
442 rc = mwl8k_request_fw(priv, filename, &priv->fw.ucode);
443 if (rc) {
444 printk(KERN_ERR "%s Error requesting firmware file %s\n",
445 pci_name(priv->pdev), filename);
446 mwl8k_release_fw(&priv->fw.helper);
447 return rc;
448 }
449
450 return 0;
451 }
452
453 struct mwl8k_cmd_pkt {
454 __le16 code;
455 __le16 length;
456 __le16 seq_num;
457 __le16 result;
458 char payload[0];
459 } __attribute__((packed));
460
461 /*
462 * Firmware loading.
463 */
464 static int
465 mwl8k_send_fw_load_cmd(struct mwl8k_priv *priv, void *data, int length)
466 {
467 void __iomem *regs = priv->regs;
468 dma_addr_t dma_addr;
469 int rc;
470 int loops;
471
472 dma_addr = pci_map_single(priv->pdev, data, length, PCI_DMA_TODEVICE);
473 if (pci_dma_mapping_error(priv->pdev, dma_addr))
474 return -ENOMEM;
475
476 iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
477 iowrite32(0, regs + MWL8K_HIU_INT_CODE);
478 iowrite32(MWL8K_H2A_INT_DOORBELL,
479 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
480 iowrite32(MWL8K_H2A_INT_DUMMY,
481 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
482
483 rc = -ETIMEDOUT;
484 loops = 1000;
485 do {
486 u32 int_code;
487
488 int_code = ioread32(regs + MWL8K_HIU_INT_CODE);
489 if (int_code == MWL8K_INT_CODE_CMD_FINISHED) {
490 iowrite32(0, regs + MWL8K_HIU_INT_CODE);
491 rc = 0;
492 break;
493 }
494
495 udelay(1);
496 } while (--loops);
497
498 pci_unmap_single(priv->pdev, dma_addr, length, PCI_DMA_TODEVICE);
499
500 /*
501 * Clear 'command done' interrupt bit.
502 */
503 loops = 1000;
504 do {
505 u32 status;
506
507 status = ioread32(priv->regs +
508 MWL8K_HIU_A2H_INTERRUPT_STATUS);
509 if (status & MWL8K_A2H_INT_OPC_DONE) {
510 iowrite32(~MWL8K_A2H_INT_OPC_DONE,
511 priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
512 ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
513 break;
514 }
515
516 udelay(1);
517 } while (--loops);
518
519 return rc;
520 }
521
522 static int mwl8k_load_fw_image(struct mwl8k_priv *priv,
523 const u8 *data, size_t length)
524 {
525 struct mwl8k_cmd_pkt *cmd;
526 int done;
527 int rc = 0;
528
529 cmd = kmalloc(sizeof(*cmd) + 256, GFP_KERNEL);
530 if (cmd == NULL)
531 return -ENOMEM;
532
533 cmd->code = cpu_to_le16(MWL8K_CMD_CODE_DNLD);
534 cmd->seq_num = 0;
535 cmd->result = 0;
536
537 done = 0;
538 while (length) {
539 int block_size = length > 256 ? 256 : length;
540
541 memcpy(cmd->payload, data + done, block_size);
542 cmd->length = cpu_to_le16(block_size);
543
544 rc = mwl8k_send_fw_load_cmd(priv, cmd,
545 sizeof(*cmd) + block_size);
546 if (rc)
547 break;
548
549 done += block_size;
550 length -= block_size;
551 }
552
553 if (!rc) {
554 cmd->length = 0;
555 rc = mwl8k_send_fw_load_cmd(priv, cmd, sizeof(*cmd));
556 }
557
558 kfree(cmd);
559
560 return rc;
561 }
562
563 static int mwl8k_feed_fw_image(struct mwl8k_priv *priv,
564 const u8 *data, size_t length)
565 {
566 unsigned char *buffer;
567 int may_continue, rc = 0;
568 u32 done, prev_block_size;
569
570 buffer = kmalloc(1024, GFP_KERNEL);
571 if (buffer == NULL)
572 return -ENOMEM;
573
574 done = 0;
575 prev_block_size = 0;
576 may_continue = 1000;
577 while (may_continue > 0) {
578 u32 block_size;
579
580 block_size = ioread32(priv->regs + MWL8K_HIU_SCRATCH);
581 if (block_size & 1) {
582 block_size &= ~1;
583 may_continue--;
584 } else {
585 done += prev_block_size;
586 length -= prev_block_size;
587 }
588
589 if (block_size > 1024 || block_size > length) {
590 rc = -EOVERFLOW;
591 break;
592 }
593
594 if (length == 0) {
595 rc = 0;
596 break;
597 }
598
599 if (block_size == 0) {
600 rc = -EPROTO;
601 may_continue--;
602 udelay(1);
603 continue;
604 }
605
606 prev_block_size = block_size;
607 memcpy(buffer, data + done, block_size);
608
609 rc = mwl8k_send_fw_load_cmd(priv, buffer, block_size);
610 if (rc)
611 break;
612 }
613
614 if (!rc && length != 0)
615 rc = -EREMOTEIO;
616
617 kfree(buffer);
618
619 return rc;
620 }
621
622 static int mwl8k_load_firmware(struct mwl8k_priv *priv)
623 {
624 int loops, rc;
625
626 const u8 *ucode = priv->fw.ucode->data;
627 size_t ucode_len = priv->fw.ucode->size;
628 const u8 *helper = priv->fw.helper->data;
629 size_t helper_len = priv->fw.helper->size;
630
631 if (!memcmp(ucode, "\x01\x00\x00\x00", 4)) {
632 rc = mwl8k_load_fw_image(priv, helper, helper_len);
633 if (rc) {
634 printk(KERN_ERR "%s: unable to load firmware "
635 "helper image\n", pci_name(priv->pdev));
636 return rc;
637 }
638 msleep(1);
639
640 rc = mwl8k_feed_fw_image(priv, ucode, ucode_len);
641 } else {
642 rc = mwl8k_load_fw_image(priv, ucode, ucode_len);
643 }
644
645 if (rc) {
646 printk(KERN_ERR "%s: unable to load firmware data\n",
647 pci_name(priv->pdev));
648 return rc;
649 }
650
651 iowrite32(MWL8K_MODE_STA, priv->regs + MWL8K_HIU_GEN_PTR);
652 msleep(1);
653
654 loops = 200000;
655 do {
656 if (ioread32(priv->regs + MWL8K_HIU_INT_CODE)
657 == MWL8K_FWSTA_READY)
658 break;
659 udelay(1);
660 } while (--loops);
661
662 return loops ? 0 : -ETIMEDOUT;
663 }
664
665
666 /*
667 * Defines shared between transmission and reception.
668 */
669 /* HT control fields for firmware */
670 struct ewc_ht_info {
671 __le16 control1;
672 __le16 control2;
673 __le16 control3;
674 } __attribute__((packed));
675
676 /* Firmware Station database operations */
677 #define MWL8K_STA_DB_ADD_ENTRY 0
678 #define MWL8K_STA_DB_MODIFY_ENTRY 1
679 #define MWL8K_STA_DB_DEL_ENTRY 2
680 #define MWL8K_STA_DB_FLUSH 3
681
682 /* Peer Entry flags - used to define the type of the peer node */
683 #define MWL8K_PEER_TYPE_ACCESSPOINT 2
684 #define MWL8K_PEER_TYPE_ADHOC_STATION 4
685
686 #define MWL8K_IEEE_LEGACY_DATA_RATES 12
687 #define MWL8K_MCS_BITMAP_SIZE 16
688 #define pad_size 16
689
690 struct peer_capability_info {
691 /* Peer type - AP vs. STA. */
692 __u8 peer_type;
693
694 /* Basic 802.11 capabilities from assoc resp. */
695 __le16 basic_caps;
696
697 /* Set if peer supports 802.11n high throughput (HT). */
698 __u8 ht_support;
699
700 /* Valid if HT is supported. */
701 __le16 ht_caps;
702 __u8 extended_ht_caps;
703 struct ewc_ht_info ewc_info;
704
705 /* Legacy rate table. Intersection of our rates and peer rates. */
706 __u8 legacy_rates[MWL8K_IEEE_LEGACY_DATA_RATES];
707
708 /* HT rate table. Intersection of our rates and peer rates. */
709 __u8 ht_rates[MWL8K_MCS_BITMAP_SIZE];
710 __u8 pad[pad_size];
711
712 /* If set, interoperability mode, no proprietary extensions. */
713 __u8 interop;
714 __u8 pad2;
715 __u8 station_id;
716 __le16 amsdu_enabled;
717 } __attribute__((packed));
718
719 /* Inline functions to manipulate QoS field in data descriptor. */
720 static inline u16 mwl8k_qos_setbit_tid(u16 qos, u8 tid)
721 {
722 u16 val_mask = 0x000f;
723 u16 qos_mask = ~val_mask;
724
725 /* TID bits 0-3 */
726 return (qos & qos_mask) | (tid & val_mask);
727 }
728
729 static inline u16 mwl8k_qos_setbit_eosp(u16 qos)
730 {
731 u16 val_mask = 1 << 4;
732
733 /* End of Service Period Bit 4 */
734 return qos | val_mask;
735 }
736
737 static inline u16 mwl8k_qos_setbit_ack(u16 qos, u8 ack_policy)
738 {
739 u16 val_mask = 0x3;
740 u8 shift = 5;
741 u16 qos_mask = ~(val_mask << shift);
742
743 /* Ack Policy Bit 5-6 */
744 return (qos & qos_mask) | ((ack_policy & val_mask) << shift);
745 }
746
747 static inline u16 mwl8k_qos_setbit_amsdu(u16 qos)
748 {
749 u16 val_mask = 1 << 7;
750
751 /* AMSDU present Bit 7 */
752 return qos | val_mask;
753 }
754
755 static inline u16 mwl8k_qos_setbit_qlen(u16 qos, u8 len)
756 {
757 u16 val_mask = 0xff;
758 u8 shift = 8;
759 u16 qos_mask = ~(val_mask << shift);
760
761 /* Queue Length Bits 8-15 */
762 return (qos & qos_mask) | ((len & val_mask) << shift);
763 }
764
765 /* DMA header used by firmware and hardware. */
766 struct mwl8k_dma_data {
767 __le16 fwlen;
768 struct ieee80211_hdr wh;
769 } __attribute__((packed));
770
771 /* Routines to add/remove DMA header from skb. */
772 static inline int mwl8k_remove_dma_header(struct sk_buff *skb)
773 {
774 struct mwl8k_dma_data *tr = (struct mwl8k_dma_data *)(skb->data);
775 void *dst, *src = &tr->wh;
776 __le16 fc = tr->wh.frame_control;
777 int hdrlen = ieee80211_hdrlen(fc);
778 u16 space = sizeof(struct mwl8k_dma_data) - hdrlen;
779
780 dst = (void *)tr + space;
781 if (dst != src) {
782 memmove(dst, src, hdrlen);
783 skb_pull(skb, space);
784 }
785
786 return 0;
787 }
788
789 static inline struct sk_buff *mwl8k_add_dma_header(struct sk_buff *skb)
790 {
791 struct ieee80211_hdr *wh;
792 u32 hdrlen, pktlen;
793 struct mwl8k_dma_data *tr;
794
795 wh = (struct ieee80211_hdr *)skb->data;
796 hdrlen = ieee80211_hdrlen(wh->frame_control);
797 pktlen = skb->len;
798
799 /*
800 * Copy up/down the 802.11 header; the firmware requires
801 * we present a 2-byte payload length followed by a
802 * 4-address header (w/o QoS), followed (optionally) by
803 * any WEP/ExtIV header (but only filled in for CCMP).
804 */
805 if (hdrlen != sizeof(struct mwl8k_dma_data))
806 skb_push(skb, sizeof(struct mwl8k_dma_data) - hdrlen);
807
808 tr = (struct mwl8k_dma_data *)skb->data;
809 if (wh != &tr->wh)
810 memmove(&tr->wh, wh, hdrlen);
811
812 /* Clear addr4 */
813 memset(tr->wh.addr4, 0, IEEE80211_ADDR_LEN);
814
815 /*
816 * Firmware length is the length of the fully formed "802.11
817 * payload". That is, everything except for the 802.11 header.
818 * This includes all crypto material including the MIC.
819 */
820 tr->fwlen = cpu_to_le16(pktlen - hdrlen);
821
822 return skb;
823 }
824
825
826 /*
827 * Packet reception.
828 */
829 #define MWL8K_RX_CTRL_KEY_INDEX_MASK 0x30
830 #define MWL8K_RX_CTRL_OWNED_BY_HOST 0x02
831 #define MWL8K_RX_CTRL_AMPDU 0x01
832
833 struct mwl8k_rx_desc {
834 __le16 pkt_len;
835 __u8 link_quality;
836 __u8 noise_level;
837 __le32 pkt_phys_addr;
838 __le32 next_rx_desc_phys_addr;
839 __le16 qos_control;
840 __le16 rate_info;
841 __le32 pad0[4];
842 __u8 rssi;
843 __u8 channel;
844 __le16 pad1;
845 __u8 rx_ctrl;
846 __u8 rx_status;
847 __u8 pad2[2];
848 } __attribute__((packed));
849
850 #define MWL8K_RX_DESCS 256
851 #define MWL8K_RX_MAXSZ 3800
852
853 static int mwl8k_rxq_init(struct ieee80211_hw *hw, int index)
854 {
855 struct mwl8k_priv *priv = hw->priv;
856 struct mwl8k_rx_queue *rxq = priv->rxq + index;
857 int size;
858 int i;
859
860 rxq->rx_desc_count = 0;
861 rxq->rx_head = 0;
862 rxq->rx_tail = 0;
863
864 size = MWL8K_RX_DESCS * sizeof(struct mwl8k_rx_desc);
865
866 rxq->rx_desc_area =
867 pci_alloc_consistent(priv->pdev, size, &rxq->rx_desc_dma);
868 if (rxq->rx_desc_area == NULL) {
869 printk(KERN_ERR "%s: failed to alloc RX descriptors\n",
870 priv->name);
871 return -ENOMEM;
872 }
873 memset(rxq->rx_desc_area, 0, size);
874
875 rxq->rx_skb = kmalloc(MWL8K_RX_DESCS *
876 sizeof(*rxq->rx_skb), GFP_KERNEL);
877 if (rxq->rx_skb == NULL) {
878 printk(KERN_ERR "%s: failed to alloc RX skbuff list\n",
879 priv->name);
880 pci_free_consistent(priv->pdev, size,
881 rxq->rx_desc_area, rxq->rx_desc_dma);
882 return -ENOMEM;
883 }
884 memset(rxq->rx_skb, 0, MWL8K_RX_DESCS * sizeof(*rxq->rx_skb));
885
886 for (i = 0; i < MWL8K_RX_DESCS; i++) {
887 struct mwl8k_rx_desc *rx_desc;
888 int nexti;
889
890 rx_desc = rxq->rx_desc_area + i;
891 nexti = (i + 1) % MWL8K_RX_DESCS;
892
893 rx_desc->next_rx_desc_phys_addr =
894 cpu_to_le32(rxq->rx_desc_dma
895 + nexti * sizeof(*rx_desc));
896 rx_desc->rx_ctrl = MWL8K_RX_CTRL_OWNED_BY_HOST;
897 }
898
899 return 0;
900 }
901
902 static int rxq_refill(struct ieee80211_hw *hw, int index, int limit)
903 {
904 struct mwl8k_priv *priv = hw->priv;
905 struct mwl8k_rx_queue *rxq = priv->rxq + index;
906 int refilled;
907
908 refilled = 0;
909 while (rxq->rx_desc_count < MWL8K_RX_DESCS && limit--) {
910 struct sk_buff *skb;
911 int rx;
912
913 skb = dev_alloc_skb(MWL8K_RX_MAXSZ);
914 if (skb == NULL)
915 break;
916
917 rxq->rx_desc_count++;
918
919 rx = rxq->rx_tail;
920 rxq->rx_tail = (rx + 1) % MWL8K_RX_DESCS;
921
922 rxq->rx_desc_area[rx].pkt_phys_addr =
923 cpu_to_le32(pci_map_single(priv->pdev, skb->data,
924 MWL8K_RX_MAXSZ, DMA_FROM_DEVICE));
925
926 rxq->rx_desc_area[rx].pkt_len = cpu_to_le16(MWL8K_RX_MAXSZ);
927 rxq->rx_skb[rx] = skb;
928 wmb();
929 rxq->rx_desc_area[rx].rx_ctrl = 0;
930
931 refilled++;
932 }
933
934 return refilled;
935 }
936
937 /* Must be called only when the card's reception is completely halted */
938 static void mwl8k_rxq_deinit(struct ieee80211_hw *hw, int index)
939 {
940 struct mwl8k_priv *priv = hw->priv;
941 struct mwl8k_rx_queue *rxq = priv->rxq + index;
942 int i;
943
944 for (i = 0; i < MWL8K_RX_DESCS; i++) {
945 if (rxq->rx_skb[i] != NULL) {
946 unsigned long addr;
947
948 addr = le32_to_cpu(rxq->rx_desc_area[i].pkt_phys_addr);
949 pci_unmap_single(priv->pdev, addr, MWL8K_RX_MAXSZ,
950 PCI_DMA_FROMDEVICE);
951 kfree_skb(rxq->rx_skb[i]);
952 rxq->rx_skb[i] = NULL;
953 }
954 }
955
956 kfree(rxq->rx_skb);
957 rxq->rx_skb = NULL;
958
959 pci_free_consistent(priv->pdev,
960 MWL8K_RX_DESCS * sizeof(struct mwl8k_rx_desc),
961 rxq->rx_desc_area, rxq->rx_desc_dma);
962 rxq->rx_desc_area = NULL;
963 }
964
965
966 /*
967 * Scan a list of BSSIDs to process for finalize join.
968 * Allows for extension to process multiple BSSIDs.
969 */
970 static inline int
971 mwl8k_capture_bssid(struct mwl8k_priv *priv, struct ieee80211_hdr *wh)
972 {
973 return priv->capture_beacon &&
974 ieee80211_is_beacon(wh->frame_control) &&
975 !compare_ether_addr(wh->addr3, priv->capture_bssid);
976 }
977
978 static inline void mwl8k_save_beacon(struct mwl8k_priv *priv,
979 struct sk_buff *skb)
980 {
981 priv->capture_beacon = false;
982 memset(priv->capture_bssid, 0, IEEE80211_ADDR_LEN);
983
984 /*
985 * Use GFP_ATOMIC as rxq_process is called from
986 * the primary interrupt handler, memory allocation call
987 * must not sleep.
988 */
989 priv->beacon_skb = skb_copy(skb, GFP_ATOMIC);
990 if (priv->beacon_skb != NULL)
991 queue_work(priv->config_wq,
992 &priv->finalize_join_worker);
993 }
994
995 static int rxq_process(struct ieee80211_hw *hw, int index, int limit)
996 {
997 struct mwl8k_priv *priv = hw->priv;
998 struct mwl8k_rx_queue *rxq = priv->rxq + index;
999 int processed;
1000
1001 processed = 0;
1002 while (rxq->rx_desc_count && limit--) {
1003 struct mwl8k_rx_desc *rx_desc;
1004 struct sk_buff *skb;
1005 struct ieee80211_rx_status status;
1006 unsigned long addr;
1007 struct ieee80211_hdr *wh;
1008
1009 rx_desc = rxq->rx_desc_area + rxq->rx_head;
1010 if (!(rx_desc->rx_ctrl & MWL8K_RX_CTRL_OWNED_BY_HOST))
1011 break;
1012 rmb();
1013
1014 skb = rxq->rx_skb[rxq->rx_head];
1015 if (skb == NULL)
1016 break;
1017 rxq->rx_skb[rxq->rx_head] = NULL;
1018
1019 rxq->rx_head = (rxq->rx_head + 1) % MWL8K_RX_DESCS;
1020 rxq->rx_desc_count--;
1021
1022 addr = le32_to_cpu(rx_desc->pkt_phys_addr);
1023 pci_unmap_single(priv->pdev, addr,
1024 MWL8K_RX_MAXSZ, PCI_DMA_FROMDEVICE);
1025
1026 skb_put(skb, le16_to_cpu(rx_desc->pkt_len));
1027 if (mwl8k_remove_dma_header(skb)) {
1028 dev_kfree_skb(skb);
1029 continue;
1030 }
1031
1032 wh = (struct ieee80211_hdr *)skb->data;
1033
1034 /*
1035 * Check for pending join operation. save a copy of
1036 * the beacon and schedule a tasklet to send finalize
1037 * join command to the firmware.
1038 */
1039 if (mwl8k_capture_bssid(priv, wh))
1040 mwl8k_save_beacon(priv, skb);
1041
1042 memset(&status, 0, sizeof(status));
1043 status.mactime = 0;
1044 status.signal = -rx_desc->rssi;
1045 status.noise = -rx_desc->noise_level;
1046 status.qual = rx_desc->link_quality;
1047 status.antenna = 1;
1048 status.rate_idx = 1;
1049 status.flag = 0;
1050 status.band = IEEE80211_BAND_2GHZ;
1051 status.freq = ieee80211_channel_to_frequency(rx_desc->channel);
1052 memcpy(IEEE80211_SKB_RXCB(skb), &status, sizeof(status));
1053 ieee80211_rx_irqsafe(hw, skb);
1054
1055 processed++;
1056 }
1057
1058 return processed;
1059 }
1060
1061
1062 /*
1063 * Packet transmission.
1064 */
1065
1066 /* Transmit queue assignment. */
1067 enum {
1068 MWL8K_WME_AC_BK = 0, /* background access */
1069 MWL8K_WME_AC_BE = 1, /* best effort access */
1070 MWL8K_WME_AC_VI = 2, /* video access */
1071 MWL8K_WME_AC_VO = 3, /* voice access */
1072 };
1073
1074 /* Transmit packet ACK policy */
1075 #define MWL8K_TXD_ACK_POLICY_NORMAL 0
1076 #define MWL8K_TXD_ACK_POLICY_NONE 1
1077 #define MWL8K_TXD_ACK_POLICY_NO_EXPLICIT 2
1078 #define MWL8K_TXD_ACK_POLICY_BLOCKACK 3
1079
1080 #define GET_TXQ(_ac) (\
1081 ((_ac) == WME_AC_VO) ? MWL8K_WME_AC_VO : \
1082 ((_ac) == WME_AC_VI) ? MWL8K_WME_AC_VI : \
1083 ((_ac) == WME_AC_BK) ? MWL8K_WME_AC_BK : \
1084 MWL8K_WME_AC_BE)
1085
1086 #define MWL8K_TXD_STATUS_IDLE 0x00000000
1087 #define MWL8K_TXD_STATUS_USED 0x00000001
1088 #define MWL8K_TXD_STATUS_OK 0x00000001
1089 #define MWL8K_TXD_STATUS_OK_RETRY 0x00000002
1090 #define MWL8K_TXD_STATUS_OK_MORE_RETRY 0x00000004
1091 #define MWL8K_TXD_STATUS_MULTICAST_TX 0x00000008
1092 #define MWL8K_TXD_STATUS_BROADCAST_TX 0x00000010
1093 #define MWL8K_TXD_STATUS_FAILED_LINK_ERROR 0x00000020
1094 #define MWL8K_TXD_STATUS_FAILED_EXCEED_LIMIT 0x00000040
1095 #define MWL8K_TXD_STATUS_FAILED_AGING 0x00000080
1096 #define MWL8K_TXD_STATUS_HOST_CMD 0x40000000
1097 #define MWL8K_TXD_STATUS_FW_OWNED 0x80000000
1098 #define MWL8K_TXD_SOFTSTALE 0x80
1099 #define MWL8K_TXD_SOFTSTALE_MGMT_RETRY 0x01
1100
1101 struct mwl8k_tx_desc {
1102 __le32 status;
1103 __u8 data_rate;
1104 __u8 tx_priority;
1105 __le16 qos_control;
1106 __le32 pkt_phys_addr;
1107 __le16 pkt_len;
1108 __u8 dest_MAC_addr[IEEE80211_ADDR_LEN];
1109 __le32 next_tx_desc_phys_addr;
1110 __le32 reserved;
1111 __le16 rate_info;
1112 __u8 peer_id;
1113 __u8 tx_frag_cnt;
1114 } __attribute__((packed));
1115
1116 #define MWL8K_TX_DESCS 128
1117
1118 static int mwl8k_txq_init(struct ieee80211_hw *hw, int index)
1119 {
1120 struct mwl8k_priv *priv = hw->priv;
1121 struct mwl8k_tx_queue *txq = priv->txq + index;
1122 int size;
1123 int i;
1124
1125 memset(&txq->tx_stats, 0,
1126 sizeof(struct ieee80211_tx_queue_stats));
1127 txq->tx_stats.limit = MWL8K_TX_DESCS;
1128 txq->tx_head = 0;
1129 txq->tx_tail = 0;
1130
1131 size = MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc);
1132
1133 txq->tx_desc_area =
1134 pci_alloc_consistent(priv->pdev, size, &txq->tx_desc_dma);
1135 if (txq->tx_desc_area == NULL) {
1136 printk(KERN_ERR "%s: failed to alloc TX descriptors\n",
1137 priv->name);
1138 return -ENOMEM;
1139 }
1140 memset(txq->tx_desc_area, 0, size);
1141
1142 txq->tx_skb = kmalloc(MWL8K_TX_DESCS * sizeof(*txq->tx_skb),
1143 GFP_KERNEL);
1144 if (txq->tx_skb == NULL) {
1145 printk(KERN_ERR "%s: failed to alloc TX skbuff list\n",
1146 priv->name);
1147 pci_free_consistent(priv->pdev, size,
1148 txq->tx_desc_area, txq->tx_desc_dma);
1149 return -ENOMEM;
1150 }
1151 memset(txq->tx_skb, 0, MWL8K_TX_DESCS * sizeof(*txq->tx_skb));
1152
1153 for (i = 0; i < MWL8K_TX_DESCS; i++) {
1154 struct mwl8k_tx_desc *tx_desc;
1155 int nexti;
1156
1157 tx_desc = txq->tx_desc_area + i;
1158 nexti = (i + 1) % MWL8K_TX_DESCS;
1159
1160 tx_desc->status = 0;
1161 tx_desc->next_tx_desc_phys_addr =
1162 cpu_to_le32(txq->tx_desc_dma +
1163 nexti * sizeof(*tx_desc));
1164 }
1165
1166 return 0;
1167 }
1168
1169 static inline void mwl8k_tx_start(struct mwl8k_priv *priv)
1170 {
1171 iowrite32(MWL8K_H2A_INT_PPA_READY,
1172 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
1173 iowrite32(MWL8K_H2A_INT_DUMMY,
1174 priv->regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
1175 ioread32(priv->regs + MWL8K_HIU_INT_CODE);
1176 }
1177
1178 static inline int mwl8k_txq_busy(struct mwl8k_priv *priv)
1179 {
1180 return priv->pending_tx_pkts;
1181 }
1182
1183 struct mwl8k_txq_info {
1184 u32 fw_owned;
1185 u32 drv_owned;
1186 u32 unused;
1187 u32 len;
1188 u32 head;
1189 u32 tail;
1190 };
1191
1192 static int mwl8k_scan_tx_ring(struct mwl8k_priv *priv,
1193 struct mwl8k_txq_info txinfo[],
1194 u32 num_queues)
1195 {
1196 int count, desc, status;
1197 struct mwl8k_tx_queue *txq;
1198 struct mwl8k_tx_desc *tx_desc;
1199 int ndescs = 0;
1200
1201 memset(txinfo, 0, num_queues * sizeof(struct mwl8k_txq_info));
1202 spin_lock_bh(&priv->tx_lock);
1203 for (count = 0; count < num_queues; count++) {
1204 txq = priv->txq + count;
1205 txinfo[count].len = txq->tx_stats.len;
1206 txinfo[count].head = txq->tx_head;
1207 txinfo[count].tail = txq->tx_tail;
1208 for (desc = 0; desc < MWL8K_TX_DESCS; desc++) {
1209 tx_desc = txq->tx_desc_area + desc;
1210 status = le32_to_cpu(tx_desc->status);
1211
1212 if (status & MWL8K_TXD_STATUS_FW_OWNED)
1213 txinfo[count].fw_owned++;
1214 else
1215 txinfo[count].drv_owned++;
1216
1217 if (tx_desc->pkt_len == 0)
1218 txinfo[count].unused++;
1219 }
1220 }
1221 spin_unlock_bh(&priv->tx_lock);
1222
1223 return ndescs;
1224 }
1225
1226 static int mwl8k_tx_wait_empty(struct ieee80211_hw *hw, u32 delay_ms)
1227 {
1228 u32 count = 0;
1229 unsigned long timeout = 0;
1230 struct mwl8k_priv *priv = hw->priv;
1231 DECLARE_COMPLETION_ONSTACK(cmd_wait);
1232
1233 might_sleep();
1234
1235 if (priv->tx_wait != NULL)
1236 printk(KERN_ERR "WARNING Previous TXWaitEmpty instance\n");
1237
1238 spin_lock_bh(&priv->tx_lock);
1239 count = mwl8k_txq_busy(priv);
1240 if (count) {
1241 priv->tx_wait = &cmd_wait;
1242 if (priv->radio_state)
1243 mwl8k_tx_start(priv);
1244 }
1245 spin_unlock_bh(&priv->tx_lock);
1246
1247 if (count) {
1248 struct mwl8k_txq_info txinfo[4];
1249 int index;
1250 int newcount;
1251
1252 timeout = wait_for_completion_timeout(&cmd_wait,
1253 msecs_to_jiffies(delay_ms));
1254 if (timeout)
1255 return 0;
1256
1257 spin_lock_bh(&priv->tx_lock);
1258 priv->tx_wait = NULL;
1259 newcount = mwl8k_txq_busy(priv);
1260 spin_unlock_bh(&priv->tx_lock);
1261
1262 printk(KERN_ERR "%s(%u) TIMEDOUT:%ums Pend:%u-->%u\n",
1263 __func__, __LINE__, delay_ms, count, newcount);
1264
1265 mwl8k_scan_tx_ring(priv, txinfo, 4);
1266 for (index = 0 ; index < 4; index++)
1267 printk(KERN_ERR
1268 "TXQ:%u L:%u H:%u T:%u FW:%u DRV:%u U:%u\n",
1269 index,
1270 txinfo[index].len,
1271 txinfo[index].head,
1272 txinfo[index].tail,
1273 txinfo[index].fw_owned,
1274 txinfo[index].drv_owned,
1275 txinfo[index].unused);
1276 return -ETIMEDOUT;
1277 }
1278
1279 return 0;
1280 }
1281
1282 #define MWL8K_TXD_OK (MWL8K_TXD_STATUS_OK | \
1283 MWL8K_TXD_STATUS_OK_RETRY | \
1284 MWL8K_TXD_STATUS_OK_MORE_RETRY)
1285 #define MWL8K_TXD_SUCCESS(stat) ((stat) & MWL8K_TXD_OK)
1286 #define MWL8K_TXD_FAIL_RETRY(stat) \
1287 ((stat) & (MWL8K_TXD_STATUS_FAILED_EXCEED_LIMIT))
1288
1289 static void mwl8k_txq_reclaim(struct ieee80211_hw *hw, int index, int force)
1290 {
1291 struct mwl8k_priv *priv = hw->priv;
1292 struct mwl8k_tx_queue *txq = priv->txq + index;
1293 int wake = 0;
1294
1295 while (txq->tx_stats.len > 0) {
1296 int tx;
1297 int rc;
1298 struct mwl8k_tx_desc *tx_desc;
1299 unsigned long addr;
1300 size_t size;
1301 struct sk_buff *skb;
1302 struct ieee80211_tx_info *info;
1303 u32 status;
1304
1305 rc = 0;
1306 tx = txq->tx_head;
1307 tx_desc = txq->tx_desc_area + tx;
1308
1309 status = le32_to_cpu(tx_desc->status);
1310
1311 if (status & MWL8K_TXD_STATUS_FW_OWNED) {
1312 if (!force)
1313 break;
1314 tx_desc->status &=
1315 ~cpu_to_le32(MWL8K_TXD_STATUS_FW_OWNED);
1316 }
1317
1318 txq->tx_head = (tx + 1) % MWL8K_TX_DESCS;
1319 BUG_ON(txq->tx_stats.len == 0);
1320 txq->tx_stats.len--;
1321 priv->pending_tx_pkts--;
1322
1323 addr = le32_to_cpu(tx_desc->pkt_phys_addr);
1324 size = (u32)(le16_to_cpu(tx_desc->pkt_len));
1325 skb = txq->tx_skb[tx].skb;
1326 txq->tx_skb[tx].skb = NULL;
1327
1328 BUG_ON(skb == NULL);
1329 pci_unmap_single(priv->pdev, addr, size, PCI_DMA_TODEVICE);
1330
1331 rc = mwl8k_remove_dma_header(skb);
1332
1333 /* Mark descriptor as unused */
1334 tx_desc->pkt_phys_addr = 0;
1335 tx_desc->pkt_len = 0;
1336
1337 if (txq->tx_skb[tx].clone) {
1338 /* Replace with original skb
1339 * before returning to stack
1340 * as buffer has been cloned
1341 */
1342 dev_kfree_skb(skb);
1343 skb = txq->tx_skb[tx].clone;
1344 txq->tx_skb[tx].clone = NULL;
1345 }
1346
1347 if (rc) {
1348 /* Something has gone wrong here.
1349 * Failed to remove DMA header.
1350 * Print error message and drop packet.
1351 */
1352 printk(KERN_ERR "%s: Error removing DMA header from "
1353 "tx skb 0x%p.\n", priv->name, skb);
1354
1355 dev_kfree_skb(skb);
1356 continue;
1357 }
1358
1359 info = IEEE80211_SKB_CB(skb);
1360 ieee80211_tx_info_clear_status(info);
1361
1362 /* Convert firmware status stuff into tx_status */
1363 if (MWL8K_TXD_SUCCESS(status)) {
1364 /* Transmit OK */
1365 info->flags |= IEEE80211_TX_STAT_ACK;
1366 }
1367
1368 ieee80211_tx_status_irqsafe(hw, skb);
1369
1370 wake = !priv->inconfig && priv->radio_state;
1371 }
1372
1373 if (wake)
1374 ieee80211_wake_queue(hw, index);
1375 }
1376
1377 /* must be called only when the card's transmit is completely halted */
1378 static void mwl8k_txq_deinit(struct ieee80211_hw *hw, int index)
1379 {
1380 struct mwl8k_priv *priv = hw->priv;
1381 struct mwl8k_tx_queue *txq = priv->txq + index;
1382
1383 mwl8k_txq_reclaim(hw, index, 1);
1384
1385 kfree(txq->tx_skb);
1386 txq->tx_skb = NULL;
1387
1388 pci_free_consistent(priv->pdev,
1389 MWL8K_TX_DESCS * sizeof(struct mwl8k_tx_desc),
1390 txq->tx_desc_area, txq->tx_desc_dma);
1391 txq->tx_desc_area = NULL;
1392 }
1393
1394 static int
1395 mwl8k_txq_xmit(struct ieee80211_hw *hw, int index, struct sk_buff *skb)
1396 {
1397 struct mwl8k_priv *priv = hw->priv;
1398 struct ieee80211_tx_info *tx_info;
1399 struct ieee80211_hdr *wh;
1400 struct mwl8k_tx_queue *txq;
1401 struct mwl8k_tx_desc *tx;
1402 struct mwl8k_dma_data *tr;
1403 struct mwl8k_vif *mwl8k_vif;
1404 struct sk_buff *org_skb = skb;
1405 dma_addr_t dma;
1406 u16 qos = 0;
1407 bool qosframe = false, ampduframe = false;
1408 bool mcframe = false, eapolframe = false;
1409 bool amsduframe = false;
1410 __le16 fc;
1411
1412 txq = priv->txq + index;
1413 tx = txq->tx_desc_area + txq->tx_tail;
1414
1415 BUG_ON(txq->tx_skb[txq->tx_tail].skb != NULL);
1416
1417 /*
1418 * Append HW DMA header to start of packet. Drop packet if
1419 * there is not enough space or a failure to unshare/unclone
1420 * the skb.
1421 */
1422 skb = mwl8k_add_dma_header(skb);
1423
1424 if (skb == NULL) {
1425 printk(KERN_DEBUG "%s: failed to prepend HW DMA "
1426 "header, dropping TX frame.\n", priv->name);
1427 dev_kfree_skb(org_skb);
1428 return NETDEV_TX_OK;
1429 }
1430
1431 tx_info = IEEE80211_SKB_CB(skb);
1432 mwl8k_vif = MWL8K_VIF(tx_info->control.vif);
1433 tr = (struct mwl8k_dma_data *)skb->data;
1434 wh = &tr->wh;
1435 fc = wh->frame_control;
1436 qosframe = ieee80211_is_data_qos(fc);
1437 mcframe = is_multicast_ether_addr(wh->addr1);
1438 ampduframe = !!(tx_info->flags & IEEE80211_TX_CTL_AMPDU);
1439
1440 if (tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
1441 u16 seqno = mwl8k_vif->seqno;
1442 wh->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
1443 wh->seq_ctrl |= cpu_to_le16(seqno << 4);
1444 mwl8k_vif->seqno = seqno++ % 4096;
1445 }
1446
1447 if (qosframe)
1448 qos = le16_to_cpu(*((__le16 *)ieee80211_get_qos_ctl(wh)));
1449
1450 dma = pci_map_single(priv->pdev, skb->data,
1451 skb->len, PCI_DMA_TODEVICE);
1452
1453 if (pci_dma_mapping_error(priv->pdev, dma)) {
1454 printk(KERN_DEBUG "%s: failed to dma map skb, "
1455 "dropping TX frame.\n", priv->name);
1456
1457 if (org_skb != NULL)
1458 dev_kfree_skb(org_skb);
1459 if (skb != NULL)
1460 dev_kfree_skb(skb);
1461 return NETDEV_TX_OK;
1462 }
1463
1464 /* Set desc header, cpu bit order. */
1465 tx->status = 0;
1466 tx->data_rate = 0;
1467 tx->tx_priority = index;
1468 tx->qos_control = 0;
1469 tx->rate_info = 0;
1470 tx->peer_id = mwl8k_vif->peer_id;
1471
1472 amsduframe = !!(qos & IEEE80211_QOS_CONTROL_A_MSDU_PRESENT);
1473
1474 /* Setup firmware control bit fields for each frame type. */
1475 if (ieee80211_is_mgmt(fc) || ieee80211_is_ctl(fc)) {
1476 tx->data_rate = 0;
1477 qos = mwl8k_qos_setbit_eosp(qos);
1478 /* Set Queue size to unspecified */
1479 qos = mwl8k_qos_setbit_qlen(qos, 0xff);
1480 } else if (ieee80211_is_data(fc)) {
1481 tx->data_rate = 1;
1482 if (mcframe)
1483 tx->status |= MWL8K_TXD_STATUS_MULTICAST_TX;
1484
1485 /*
1486 * Tell firmware to not send EAPOL pkts in an
1487 * aggregate. Verify against mac80211 tx path. If
1488 * stack turns off AMPDU for an EAPOL frame this
1489 * check will be removed.
1490 */
1491 if (eapolframe) {
1492 qos = mwl8k_qos_setbit_ack(qos,
1493 MWL8K_TXD_ACK_POLICY_NORMAL);
1494 } else {
1495 /* Send pkt in an aggregate if AMPDU frame. */
1496 if (ampduframe)
1497 qos = mwl8k_qos_setbit_ack(qos,
1498 MWL8K_TXD_ACK_POLICY_BLOCKACK);
1499 else
1500 qos = mwl8k_qos_setbit_ack(qos,
1501 MWL8K_TXD_ACK_POLICY_NORMAL);
1502
1503 if (amsduframe)
1504 qos = mwl8k_qos_setbit_amsdu(qos);
1505 }
1506 }
1507
1508 /* Convert to little endian */
1509 tx->qos_control = cpu_to_le16(qos);
1510 tx->status = cpu_to_le32(tx->status);
1511 tx->pkt_phys_addr = cpu_to_le32(dma);
1512 tx->pkt_len = cpu_to_le16(skb->len);
1513
1514 txq->tx_skb[txq->tx_tail].skb = skb;
1515 txq->tx_skb[txq->tx_tail].clone =
1516 skb == org_skb ? NULL : org_skb;
1517
1518 spin_lock_bh(&priv->tx_lock);
1519
1520 tx->status = cpu_to_le32(MWL8K_TXD_STATUS_OK |
1521 MWL8K_TXD_STATUS_FW_OWNED);
1522 wmb();
1523 txq->tx_stats.len++;
1524 priv->pending_tx_pkts++;
1525 txq->tx_stats.count++;
1526 txq->tx_tail++;
1527
1528 if (txq->tx_tail == MWL8K_TX_DESCS)
1529 txq->tx_tail = 0;
1530 if (txq->tx_head == txq->tx_tail)
1531 ieee80211_stop_queue(hw, index);
1532
1533 if (priv->inconfig) {
1534 /*
1535 * Silently queue packet when we are in the middle of
1536 * a config cycle. Notify firmware only if we are
1537 * waiting for TXQs to empty. If a packet is sent
1538 * before .config() is complete, perhaps it is better
1539 * to drop the packet, as the channel is being changed
1540 * and the packet will end up on the wrong channel.
1541 */
1542 printk(KERN_ERR "%s(): WARNING TX activity while "
1543 "in config\n", __func__);
1544
1545 if (priv->tx_wait != NULL)
1546 mwl8k_tx_start(priv);
1547 } else
1548 mwl8k_tx_start(priv);
1549
1550 spin_unlock_bh(&priv->tx_lock);
1551
1552 return NETDEV_TX_OK;
1553 }
1554
1555
1556 /*
1557 * Command processing.
1558 */
1559
1560 /* Timeout firmware commands after 2000ms */
1561 #define MWL8K_CMD_TIMEOUT_MS 2000
1562
1563 static int mwl8k_post_cmd(struct ieee80211_hw *hw, struct mwl8k_cmd_pkt *cmd)
1564 {
1565 DECLARE_COMPLETION_ONSTACK(cmd_wait);
1566 struct mwl8k_priv *priv = hw->priv;
1567 void __iomem *regs = priv->regs;
1568 dma_addr_t dma_addr;
1569 unsigned int dma_size;
1570 int rc;
1571 u16 __iomem *result;
1572 unsigned long timeout = 0;
1573 u8 buf[32];
1574
1575 cmd->result = 0xFFFF;
1576 dma_size = le16_to_cpu(cmd->length);
1577 dma_addr = pci_map_single(priv->pdev, cmd, dma_size,
1578 PCI_DMA_BIDIRECTIONAL);
1579 if (pci_dma_mapping_error(priv->pdev, dma_addr))
1580 return -ENOMEM;
1581
1582 if (priv->hostcmd_wait != NULL)
1583 printk(KERN_ERR "WARNING host command in progress\n");
1584
1585 spin_lock_irq(&priv->fw_lock);
1586 priv->hostcmd_wait = &cmd_wait;
1587 iowrite32(dma_addr, regs + MWL8K_HIU_GEN_PTR);
1588 iowrite32(MWL8K_H2A_INT_DOORBELL,
1589 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
1590 iowrite32(MWL8K_H2A_INT_DUMMY,
1591 regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
1592 spin_unlock_irq(&priv->fw_lock);
1593
1594 timeout = wait_for_completion_timeout(&cmd_wait,
1595 msecs_to_jiffies(MWL8K_CMD_TIMEOUT_MS));
1596
1597 pci_unmap_single(priv->pdev, dma_addr, dma_size,
1598 PCI_DMA_BIDIRECTIONAL);
1599
1600 result = &cmd->result;
1601 if (!timeout) {
1602 spin_lock_irq(&priv->fw_lock);
1603 priv->hostcmd_wait = NULL;
1604 spin_unlock_irq(&priv->fw_lock);
1605 printk(KERN_ERR "%s: Command %s timeout after %u ms\n",
1606 priv->name,
1607 mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
1608 MWL8K_CMD_TIMEOUT_MS);
1609 rc = -ETIMEDOUT;
1610 } else {
1611 rc = *result ? -EINVAL : 0;
1612 if (rc)
1613 printk(KERN_ERR "%s: Command %s error 0x%x\n",
1614 priv->name,
1615 mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
1616 *result);
1617 }
1618
1619 return rc;
1620 }
1621
1622 /*
1623 * GET_HW_SPEC.
1624 */
1625 struct mwl8k_cmd_get_hw_spec {
1626 struct mwl8k_cmd_pkt header;
1627 __u8 hw_rev;
1628 __u8 host_interface;
1629 __le16 num_mcaddrs;
1630 __u8 perm_addr[IEEE80211_ADDR_LEN];
1631 __le16 region_code;
1632 __le32 fw_rev;
1633 __le32 ps_cookie;
1634 __le32 caps;
1635 __u8 mcs_bitmap[16];
1636 __le32 rx_queue_ptr;
1637 __le32 num_tx_queues;
1638 __le32 tx_queue_ptrs[MWL8K_TX_QUEUES];
1639 __le32 caps2;
1640 __le32 num_tx_desc_per_queue;
1641 __le32 total_rx_desc;
1642 } __attribute__((packed));
1643
1644 static int mwl8k_cmd_get_hw_spec(struct ieee80211_hw *hw)
1645 {
1646 struct mwl8k_priv *priv = hw->priv;
1647 struct mwl8k_cmd_get_hw_spec *cmd;
1648 int rc;
1649 int i;
1650
1651 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1652 if (cmd == NULL)
1653 return -ENOMEM;
1654
1655 cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_HW_SPEC);
1656 cmd->header.length = cpu_to_le16(sizeof(*cmd));
1657
1658 memset(cmd->perm_addr, 0xff, sizeof(cmd->perm_addr));
1659 cmd->ps_cookie = cpu_to_le32(priv->cookie_dma);
1660 cmd->rx_queue_ptr = cpu_to_le32(priv->rxq[0].rx_desc_dma);
1661 cmd->num_tx_queues = cpu_to_le32(MWL8K_TX_QUEUES);
1662 for (i = 0; i < MWL8K_TX_QUEUES; i++)
1663 cmd->tx_queue_ptrs[i] = cpu_to_le32(priv->txq[i].tx_desc_dma);
1664 cmd->num_tx_desc_per_queue = cpu_to_le32(MWL8K_TX_DESCS);
1665 cmd->total_rx_desc = cpu_to_le32(MWL8K_RX_DESCS);
1666
1667 rc = mwl8k_post_cmd(hw, &cmd->header);
1668
1669 if (!rc) {
1670 SET_IEEE80211_PERM_ADDR(hw, cmd->perm_addr);
1671 priv->num_mcaddrs = le16_to_cpu(cmd->num_mcaddrs);
1672 priv->fw_rev = le32_to_cpu(cmd->fw_rev);
1673 priv->hw_rev = cmd->hw_rev;
1674 priv->region_code = le16_to_cpu(cmd->region_code);
1675 }
1676
1677 kfree(cmd);
1678 return rc;
1679 }
1680
1681 /*
1682 * CMD_MAC_MULTICAST_ADR.
1683 */
1684 struct mwl8k_cmd_mac_multicast_adr {
1685 struct mwl8k_cmd_pkt header;
1686 __le16 action;
1687 __le16 numaddr;
1688 __u8 addr[1][IEEE80211_ADDR_LEN];
1689 };
1690
1691 #define MWL8K_ENABLE_RX_MULTICAST 0x000F
1692 static int mwl8k_cmd_mac_multicast_adr(struct ieee80211_hw *hw,
1693 int mc_count,
1694 struct dev_addr_list *mclist)
1695 {
1696 struct mwl8k_cmd_mac_multicast_adr *cmd;
1697 int index = 0;
1698 int rc;
1699 int size = sizeof(*cmd) + ((mc_count - 1) * IEEE80211_ADDR_LEN);
1700 cmd = kzalloc(size, GFP_KERNEL);
1701 if (cmd == NULL)
1702 return -ENOMEM;
1703
1704 cmd->header.code = cpu_to_le16(MWL8K_CMD_MAC_MULTICAST_ADR);
1705 cmd->header.length = cpu_to_le16(size);
1706 cmd->action = cpu_to_le16(MWL8K_ENABLE_RX_MULTICAST);
1707 cmd->numaddr = cpu_to_le16(mc_count);
1708 while ((index < mc_count) && mclist) {
1709 if (mclist->da_addrlen != IEEE80211_ADDR_LEN) {
1710 rc = -EINVAL;
1711 goto mwl8k_cmd_mac_multicast_adr_exit;
1712 }
1713 memcpy(cmd->addr[index], mclist->da_addr, IEEE80211_ADDR_LEN);
1714 index++;
1715 mclist = mclist->next;
1716 }
1717
1718 rc = mwl8k_post_cmd(hw, &cmd->header);
1719
1720 mwl8k_cmd_mac_multicast_adr_exit:
1721 kfree(cmd);
1722 return rc;
1723 }
1724
1725 /*
1726 * CMD_802_11_GET_STAT.
1727 */
1728 struct mwl8k_cmd_802_11_get_stat {
1729 struct mwl8k_cmd_pkt header;
1730 __le16 action;
1731 __le32 stats[64];
1732 } __attribute__((packed));
1733
1734 #define MWL8K_STAT_ACK_FAILURE 9
1735 #define MWL8K_STAT_RTS_FAILURE 12
1736 #define MWL8K_STAT_FCS_ERROR 24
1737 #define MWL8K_STAT_RTS_SUCCESS 11
1738
1739 static int mwl8k_cmd_802_11_get_stat(struct ieee80211_hw *hw,
1740 struct ieee80211_low_level_stats *stats)
1741 {
1742 struct mwl8k_cmd_802_11_get_stat *cmd;
1743 int rc;
1744
1745 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1746 if (cmd == NULL)
1747 return -ENOMEM;
1748
1749 cmd->header.code = cpu_to_le16(MWL8K_CMD_GET_STAT);
1750 cmd->header.length = cpu_to_le16(sizeof(*cmd));
1751 cmd->action = cpu_to_le16(MWL8K_CMD_GET);
1752
1753 rc = mwl8k_post_cmd(hw, &cmd->header);
1754 if (!rc) {
1755 stats->dot11ACKFailureCount =
1756 le32_to_cpu(cmd->stats[MWL8K_STAT_ACK_FAILURE]);
1757 stats->dot11RTSFailureCount =
1758 le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_FAILURE]);
1759 stats->dot11FCSErrorCount =
1760 le32_to_cpu(cmd->stats[MWL8K_STAT_FCS_ERROR]);
1761 stats->dot11RTSSuccessCount =
1762 le32_to_cpu(cmd->stats[MWL8K_STAT_RTS_SUCCESS]);
1763 }
1764 kfree(cmd);
1765
1766 return rc;
1767 }
1768
1769 /*
1770 * CMD_802_11_RADIO_CONTROL.
1771 */
1772 struct mwl8k_cmd_802_11_radio_control {
1773 struct mwl8k_cmd_pkt header;
1774 __le16 action;
1775 __le16 control;
1776 __le16 radio_on;
1777 } __attribute__((packed));
1778
1779 static int mwl8k_cmd_802_11_radio_control(struct ieee80211_hw *hw, int enable)
1780 {
1781 struct mwl8k_priv *priv = hw->priv;
1782 struct mwl8k_cmd_802_11_radio_control *cmd;
1783 int rc;
1784
1785 if (((enable & MWL8K_RADIO_ENABLE) == priv->radio_state) &&
1786 !(enable & MWL8K_RADIO_FORCE))
1787 return 0;
1788
1789 enable &= MWL8K_RADIO_ENABLE;
1790
1791 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1792 if (cmd == NULL)
1793 return -ENOMEM;
1794
1795 cmd->header.code = cpu_to_le16(MWL8K_CMD_RADIO_CONTROL);
1796 cmd->header.length = cpu_to_le16(sizeof(*cmd));
1797 cmd->action = cpu_to_le16(MWL8K_CMD_SET);
1798 cmd->control = cpu_to_le16(priv->radio_preamble);
1799 cmd->radio_on = cpu_to_le16(enable ? 0x0001 : 0x0000);
1800
1801 rc = mwl8k_post_cmd(hw, &cmd->header);
1802 kfree(cmd);
1803
1804 if (!rc)
1805 priv->radio_state = enable;
1806
1807 return rc;
1808 }
1809
1810 static int
1811 mwl8k_set_radio_preamble(struct ieee80211_hw *hw, bool short_preamble)
1812 {
1813 struct mwl8k_priv *priv;
1814
1815 if (hw == NULL || hw->priv == NULL)
1816 return -EINVAL;
1817 priv = hw->priv;
1818
1819 priv->radio_preamble = (short_preamble ?
1820 MWL8K_RADIO_SHORT_PREAMBLE :
1821 MWL8K_RADIO_LONG_PREAMBLE);
1822
1823 return mwl8k_cmd_802_11_radio_control(hw,
1824 MWL8K_RADIO_ENABLE | MWL8K_RADIO_FORCE);
1825 }
1826
1827 /*
1828 * CMD_802_11_RF_TX_POWER.
1829 */
1830 #define MWL8K_TX_POWER_LEVEL_TOTAL 8
1831
1832 struct mwl8k_cmd_802_11_rf_tx_power {
1833 struct mwl8k_cmd_pkt header;
1834 __le16 action;
1835 __le16 support_level;
1836 __le16 current_level;
1837 __le16 reserved;
1838 __le16 power_level_list[MWL8K_TX_POWER_LEVEL_TOTAL];
1839 } __attribute__((packed));
1840
1841 static int mwl8k_cmd_802_11_rf_tx_power(struct ieee80211_hw *hw, int dBm)
1842 {
1843 struct mwl8k_cmd_802_11_rf_tx_power *cmd;
1844 int rc;
1845
1846 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1847 if (cmd == NULL)
1848 return -ENOMEM;
1849
1850 cmd->header.code = cpu_to_le16(MWL8K_CMD_RF_TX_POWER);
1851 cmd->header.length = cpu_to_le16(sizeof(*cmd));
1852 cmd->action = cpu_to_le16(MWL8K_CMD_SET);
1853 cmd->support_level = cpu_to_le16(dBm);
1854
1855 rc = mwl8k_post_cmd(hw, &cmd->header);
1856 kfree(cmd);
1857
1858 return rc;
1859 }
1860
1861 /*
1862 * CMD_SET_PRE_SCAN.
1863 */
1864 struct mwl8k_cmd_set_pre_scan {
1865 struct mwl8k_cmd_pkt header;
1866 } __attribute__((packed));
1867
1868 static int mwl8k_cmd_set_pre_scan(struct ieee80211_hw *hw)
1869 {
1870 struct mwl8k_cmd_set_pre_scan *cmd;
1871 int rc;
1872
1873 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1874 if (cmd == NULL)
1875 return -ENOMEM;
1876
1877 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_PRE_SCAN);
1878 cmd->header.length = cpu_to_le16(sizeof(*cmd));
1879
1880 rc = mwl8k_post_cmd(hw, &cmd->header);
1881 kfree(cmd);
1882
1883 return rc;
1884 }
1885
1886 /*
1887 * CMD_SET_POST_SCAN.
1888 */
1889 struct mwl8k_cmd_set_post_scan {
1890 struct mwl8k_cmd_pkt header;
1891 __le32 isibss;
1892 __u8 bssid[IEEE80211_ADDR_LEN];
1893 } __attribute__((packed));
1894
1895 static int
1896 mwl8k_cmd_set_post_scan(struct ieee80211_hw *hw, __u8 mac[IEEE80211_ADDR_LEN])
1897 {
1898 struct mwl8k_cmd_set_post_scan *cmd;
1899 int rc;
1900
1901 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1902 if (cmd == NULL)
1903 return -ENOMEM;
1904
1905 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_POST_SCAN);
1906 cmd->header.length = cpu_to_le16(sizeof(*cmd));
1907 cmd->isibss = 0;
1908 memcpy(cmd->bssid, mac, IEEE80211_ADDR_LEN);
1909
1910 rc = mwl8k_post_cmd(hw, &cmd->header);
1911 kfree(cmd);
1912
1913 return rc;
1914 }
1915
1916 /*
1917 * CMD_SET_RF_CHANNEL.
1918 */
1919 struct mwl8k_cmd_set_rf_channel {
1920 struct mwl8k_cmd_pkt header;
1921 __le16 action;
1922 __u8 current_channel;
1923 __le32 channel_flags;
1924 } __attribute__((packed));
1925
1926 static int mwl8k_cmd_set_rf_channel(struct ieee80211_hw *hw,
1927 struct ieee80211_channel *channel)
1928 {
1929 struct mwl8k_cmd_set_rf_channel *cmd;
1930 int rc;
1931
1932 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1933 if (cmd == NULL)
1934 return -ENOMEM;
1935
1936 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RF_CHANNEL);
1937 cmd->header.length = cpu_to_le16(sizeof(*cmd));
1938 cmd->action = cpu_to_le16(MWL8K_CMD_SET);
1939 cmd->current_channel = channel->hw_value;
1940 if (channel->band == IEEE80211_BAND_2GHZ)
1941 cmd->channel_flags = cpu_to_le32(0x00000081);
1942 else
1943 cmd->channel_flags = cpu_to_le32(0x00000000);
1944
1945 rc = mwl8k_post_cmd(hw, &cmd->header);
1946 kfree(cmd);
1947
1948 return rc;
1949 }
1950
1951 /*
1952 * CMD_SET_SLOT.
1953 */
1954 struct mwl8k_cmd_set_slot {
1955 struct mwl8k_cmd_pkt header;
1956 __le16 action;
1957 __u8 short_slot;
1958 } __attribute__((packed));
1959
1960 static int mwl8k_cmd_set_slot(struct ieee80211_hw *hw, int slot_time)
1961 {
1962 struct mwl8k_cmd_set_slot *cmd;
1963 int rc;
1964
1965 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1966 if (cmd == NULL)
1967 return -ENOMEM;
1968
1969 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_SLOT);
1970 cmd->header.length = cpu_to_le16(sizeof(*cmd));
1971 cmd->action = cpu_to_le16(MWL8K_CMD_SET);
1972 cmd->short_slot = slot_time == MWL8K_SHORT_SLOTTIME ? 1 : 0;
1973
1974 rc = mwl8k_post_cmd(hw, &cmd->header);
1975 kfree(cmd);
1976
1977 return rc;
1978 }
1979
1980 /*
1981 * CMD_MIMO_CONFIG.
1982 */
1983 struct mwl8k_cmd_mimo_config {
1984 struct mwl8k_cmd_pkt header;
1985 __le32 action;
1986 __u8 rx_antenna_map;
1987 __u8 tx_antenna_map;
1988 } __attribute__((packed));
1989
1990 static int mwl8k_cmd_mimo_config(struct ieee80211_hw *hw, __u8 rx, __u8 tx)
1991 {
1992 struct mwl8k_cmd_mimo_config *cmd;
1993 int rc;
1994
1995 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1996 if (cmd == NULL)
1997 return -ENOMEM;
1998
1999 cmd->header.code = cpu_to_le16(MWL8K_CMD_MIMO_CONFIG);
2000 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2001 cmd->action = cpu_to_le32((u32)MWL8K_CMD_SET);
2002 cmd->rx_antenna_map = rx;
2003 cmd->tx_antenna_map = tx;
2004
2005 rc = mwl8k_post_cmd(hw, &cmd->header);
2006 kfree(cmd);
2007
2008 return rc;
2009 }
2010
2011 /*
2012 * CMD_ENABLE_SNIFFER.
2013 */
2014 struct mwl8k_cmd_enable_sniffer {
2015 struct mwl8k_cmd_pkt header;
2016 __le32 action;
2017 } __attribute__((packed));
2018
2019 static int mwl8k_enable_sniffer(struct ieee80211_hw *hw, bool enable)
2020 {
2021 struct mwl8k_cmd_enable_sniffer *cmd;
2022 int rc;
2023
2024 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2025 if (cmd == NULL)
2026 return -ENOMEM;
2027
2028 cmd->header.code = cpu_to_le16(MWL8K_CMD_ENABLE_SNIFFER);
2029 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2030 cmd->action = enable ? cpu_to_le32((u32)MWL8K_CMD_SET) : 0;
2031
2032 rc = mwl8k_post_cmd(hw, &cmd->header);
2033 kfree(cmd);
2034
2035 return rc;
2036 }
2037
2038 /*
2039 * CMD_SET_RATE_ADAPT_MODE.
2040 */
2041 struct mwl8k_cmd_set_rate_adapt_mode {
2042 struct mwl8k_cmd_pkt header;
2043 __le16 action;
2044 __le16 mode;
2045 } __attribute__((packed));
2046
2047 static int mwl8k_cmd_setrateadaptmode(struct ieee80211_hw *hw, __u16 mode)
2048 {
2049 struct mwl8k_cmd_set_rate_adapt_mode *cmd;
2050 int rc;
2051
2052 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2053 if (cmd == NULL)
2054 return -ENOMEM;
2055
2056 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATEADAPT_MODE);
2057 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2058 cmd->action = cpu_to_le16(MWL8K_CMD_SET);
2059 cmd->mode = cpu_to_le16(mode);
2060
2061 rc = mwl8k_post_cmd(hw, &cmd->header);
2062 kfree(cmd);
2063
2064 return rc;
2065 }
2066
2067 /*
2068 * CMD_SET_WMM_MODE.
2069 */
2070 struct mwl8k_cmd_set_wmm {
2071 struct mwl8k_cmd_pkt header;
2072 __le16 action;
2073 } __attribute__((packed));
2074
2075 static int mwl8k_set_wmm(struct ieee80211_hw *hw, bool enable)
2076 {
2077 struct mwl8k_priv *priv = hw->priv;
2078 struct mwl8k_cmd_set_wmm *cmd;
2079 int rc;
2080
2081 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2082 if (cmd == NULL)
2083 return -ENOMEM;
2084
2085 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_WMM_MODE);
2086 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2087 cmd->action = enable ? cpu_to_le16(MWL8K_CMD_SET) : 0;
2088
2089 rc = mwl8k_post_cmd(hw, &cmd->header);
2090 kfree(cmd);
2091
2092 if (!rc)
2093 priv->wmm_mode = enable;
2094
2095 return rc;
2096 }
2097
2098 /*
2099 * CMD_SET_RTS_THRESHOLD.
2100 */
2101 struct mwl8k_cmd_rts_threshold {
2102 struct mwl8k_cmd_pkt header;
2103 __le16 action;
2104 __le16 threshold;
2105 } __attribute__((packed));
2106
2107 static int mwl8k_rts_threshold(struct ieee80211_hw *hw,
2108 u16 action, u16 *threshold)
2109 {
2110 struct mwl8k_cmd_rts_threshold *cmd;
2111 int rc;
2112
2113 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2114 if (cmd == NULL)
2115 return -ENOMEM;
2116
2117 cmd->header.code = cpu_to_le16(MWL8K_CMD_RTS_THRESHOLD);
2118 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2119 cmd->action = cpu_to_le16(action);
2120 cmd->threshold = cpu_to_le16(*threshold);
2121
2122 rc = mwl8k_post_cmd(hw, &cmd->header);
2123 kfree(cmd);
2124
2125 return rc;
2126 }
2127
2128 /*
2129 * CMD_SET_EDCA_PARAMS.
2130 */
2131 struct mwl8k_cmd_set_edca_params {
2132 struct mwl8k_cmd_pkt header;
2133
2134 /* See MWL8K_SET_EDCA_XXX below */
2135 __le16 action;
2136
2137 /* TX opportunity in units of 32 us */
2138 __le16 txop;
2139
2140 /* Log exponent of max contention period: 0...15*/
2141 __u8 log_cw_max;
2142
2143 /* Log exponent of min contention period: 0...15 */
2144 __u8 log_cw_min;
2145
2146 /* Adaptive interframe spacing in units of 32us */
2147 __u8 aifs;
2148
2149 /* TX queue to configure */
2150 __u8 txq;
2151 } __attribute__((packed));
2152
2153 #define MWL8K_GET_EDCA_ALL 0
2154 #define MWL8K_SET_EDCA_CW 0x01
2155 #define MWL8K_SET_EDCA_TXOP 0x02
2156 #define MWL8K_SET_EDCA_AIFS 0x04
2157
2158 #define MWL8K_SET_EDCA_ALL (MWL8K_SET_EDCA_CW | \
2159 MWL8K_SET_EDCA_TXOP | \
2160 MWL8K_SET_EDCA_AIFS)
2161
2162 static int
2163 mwl8k_set_edca_params(struct ieee80211_hw *hw, __u8 qnum,
2164 __u16 cw_min, __u16 cw_max,
2165 __u8 aifs, __u16 txop)
2166 {
2167 struct mwl8k_cmd_set_edca_params *cmd;
2168 u32 log_cw_min, log_cw_max;
2169 int rc;
2170
2171 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2172 if (cmd == NULL)
2173 return -ENOMEM;
2174
2175 log_cw_min = ilog2(cw_min+1);
2176 log_cw_max = ilog2(cw_max+1);
2177 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_EDCA_PARAMS);
2178 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2179
2180 cmd->action = cpu_to_le16(MWL8K_SET_EDCA_ALL);
2181 cmd->txop = cpu_to_le16(txop);
2182 cmd->log_cw_max = (u8)log_cw_max;
2183 cmd->log_cw_min = (u8)log_cw_min;
2184 cmd->aifs = aifs;
2185 cmd->txq = qnum;
2186
2187 rc = mwl8k_post_cmd(hw, &cmd->header);
2188 kfree(cmd);
2189
2190 return rc;
2191 }
2192
2193 /*
2194 * CMD_FINALIZE_JOIN.
2195 */
2196
2197 /* FJ beacon buffer size is compiled into the firmware. */
2198 #define MWL8K_FJ_BEACON_MAXLEN 128
2199
2200 struct mwl8k_cmd_finalize_join {
2201 struct mwl8k_cmd_pkt header;
2202 __le32 sleep_interval; /* Number of beacon periods to sleep */
2203 __u8 beacon_data[MWL8K_FJ_BEACON_MAXLEN];
2204 } __attribute__((packed));
2205
2206 static int mwl8k_finalize_join(struct ieee80211_hw *hw, void *frame,
2207 __u16 framelen, __u16 dtim)
2208 {
2209 struct mwl8k_cmd_finalize_join *cmd;
2210 struct ieee80211_mgmt *payload = frame;
2211 u16 hdrlen;
2212 u32 payload_len;
2213 int rc;
2214
2215 if (frame == NULL)
2216 return -EINVAL;
2217
2218 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2219 if (cmd == NULL)
2220 return -ENOMEM;
2221
2222 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_FINALIZE_JOIN);
2223 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2224
2225 if (dtim)
2226 cmd->sleep_interval = cpu_to_le32(dtim);
2227 else
2228 cmd->sleep_interval = cpu_to_le32(1);
2229
2230 hdrlen = ieee80211_hdrlen(payload->frame_control);
2231
2232 payload_len = framelen > hdrlen ? framelen - hdrlen : 0;
2233
2234 /* XXX TBD Might just have to abort and return an error */
2235 if (payload_len > MWL8K_FJ_BEACON_MAXLEN)
2236 printk(KERN_ERR "%s(): WARNING: Incomplete beacon "
2237 "sent to firmware. Sz=%u MAX=%u\n", __func__,
2238 payload_len, MWL8K_FJ_BEACON_MAXLEN);
2239
2240 payload_len = payload_len > MWL8K_FJ_BEACON_MAXLEN ?
2241 MWL8K_FJ_BEACON_MAXLEN : payload_len;
2242
2243 if (payload && payload_len)
2244 memcpy(cmd->beacon_data, &payload->u.beacon, payload_len);
2245
2246 rc = mwl8k_post_cmd(hw, &cmd->header);
2247 kfree(cmd);
2248 return rc;
2249 }
2250
2251 /*
2252 * CMD_UPDATE_STADB.
2253 */
2254 struct mwl8k_cmd_update_sta_db {
2255 struct mwl8k_cmd_pkt header;
2256
2257 /* See STADB_ACTION_TYPE */
2258 __le32 action;
2259
2260 /* Peer MAC address */
2261 __u8 peer_addr[IEEE80211_ADDR_LEN];
2262
2263 __le32 reserved;
2264
2265 /* Peer info - valid during add/update. */
2266 struct peer_capability_info peer_info;
2267 } __attribute__((packed));
2268
2269 static int mwl8k_cmd_update_sta_db(struct ieee80211_hw *hw,
2270 struct ieee80211_vif *vif, __u32 action)
2271 {
2272 struct mwl8k_vif *mv_vif = MWL8K_VIF(vif);
2273 struct ieee80211_bss_conf *info = &mv_vif->bss_info;
2274 struct mwl8k_cmd_update_sta_db *cmd;
2275 struct peer_capability_info *peer_info;
2276 struct ieee80211_rate *bitrates = mv_vif->legacy_rates;
2277 int rc;
2278 __u8 count, *rates;
2279
2280 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2281 if (cmd == NULL)
2282 return -ENOMEM;
2283
2284 cmd->header.code = cpu_to_le16(MWL8K_CMD_UPDATE_STADB);
2285 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2286
2287 cmd->action = cpu_to_le32(action);
2288 peer_info = &cmd->peer_info;
2289 memcpy(cmd->peer_addr, mv_vif->bssid, IEEE80211_ADDR_LEN);
2290
2291 switch (action) {
2292 case MWL8K_STA_DB_ADD_ENTRY:
2293 case MWL8K_STA_DB_MODIFY_ENTRY:
2294 /* Build peer_info block */
2295 peer_info->peer_type = MWL8K_PEER_TYPE_ACCESSPOINT;
2296 peer_info->basic_caps = cpu_to_le16(info->assoc_capability);
2297 peer_info->interop = 1;
2298 peer_info->amsdu_enabled = 0;
2299
2300 rates = peer_info->legacy_rates;
2301 for (count = 0 ; count < mv_vif->legacy_nrates; count++)
2302 rates[count] = bitrates[count].hw_value;
2303
2304 rc = mwl8k_post_cmd(hw, &cmd->header);
2305 if (rc == 0)
2306 mv_vif->peer_id = peer_info->station_id;
2307
2308 break;
2309
2310 case MWL8K_STA_DB_DEL_ENTRY:
2311 case MWL8K_STA_DB_FLUSH:
2312 default:
2313 rc = mwl8k_post_cmd(hw, &cmd->header);
2314 if (rc == 0)
2315 mv_vif->peer_id = 0;
2316 break;
2317 }
2318 kfree(cmd);
2319
2320 return rc;
2321 }
2322
2323 /*
2324 * CMD_SET_AID.
2325 */
2326 #define IEEE80211_OPMODE_DISABLED 0x00
2327 #define IEEE80211_OPMODE_NON_MEMBER_PROT_MODE 0x01
2328 #define IEEE80211_OPMODE_ONE_20MHZ_STA_PROT_MODE 0x02
2329 #define IEEE80211_OPMODE_HTMIXED_PROT_MODE 0x03
2330
2331 #define MWL8K_RATE_INDEX_MAX_ARRAY 14
2332
2333 #define MWL8K_FRAME_PROT_DISABLED 0x00
2334 #define MWL8K_FRAME_PROT_11G 0x07
2335 #define MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY 0x02
2336 #define MWL8K_FRAME_PROT_11N_HT_ALL 0x06
2337 #define MWL8K_FRAME_PROT_MASK 0x07
2338
2339 struct mwl8k_cmd_update_set_aid {
2340 struct mwl8k_cmd_pkt header;
2341 __le16 aid;
2342
2343 /* AP's MAC address (BSSID) */
2344 __u8 bssid[IEEE80211_ADDR_LEN];
2345 __le16 protection_mode;
2346 __u8 supp_rates[MWL8K_RATE_INDEX_MAX_ARRAY];
2347 } __attribute__((packed));
2348
2349 static int mwl8k_cmd_set_aid(struct ieee80211_hw *hw,
2350 struct ieee80211_vif *vif)
2351 {
2352 struct mwl8k_vif *mv_vif = MWL8K_VIF(vif);
2353 struct ieee80211_bss_conf *info = &mv_vif->bss_info;
2354 struct mwl8k_cmd_update_set_aid *cmd;
2355 struct ieee80211_rate *bitrates = mv_vif->legacy_rates;
2356 int count;
2357 u16 prot_mode;
2358 int rc;
2359
2360 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2361 if (cmd == NULL)
2362 return -ENOMEM;
2363
2364 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_AID);
2365 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2366 cmd->aid = cpu_to_le16(info->aid);
2367
2368 memcpy(cmd->bssid, mv_vif->bssid, IEEE80211_ADDR_LEN);
2369
2370 prot_mode = MWL8K_FRAME_PROT_DISABLED;
2371
2372 if (info->use_cts_prot) {
2373 prot_mode = MWL8K_FRAME_PROT_11G;
2374 } else {
2375 switch (info->ht_operation_mode &
2376 IEEE80211_HT_OP_MODE_PROTECTION) {
2377 case IEEE80211_HT_OP_MODE_PROTECTION_20MHZ:
2378 prot_mode = MWL8K_FRAME_PROT_11N_HT_40MHZ_ONLY;
2379 break;
2380 case IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED:
2381 prot_mode = MWL8K_FRAME_PROT_11N_HT_ALL;
2382 break;
2383 default:
2384 prot_mode = MWL8K_FRAME_PROT_DISABLED;
2385 break;
2386 }
2387 }
2388
2389 cmd->protection_mode = cpu_to_le16(prot_mode);
2390
2391 for (count = 0; count < mv_vif->legacy_nrates; count++)
2392 cmd->supp_rates[count] = bitrates[count].hw_value;
2393
2394 rc = mwl8k_post_cmd(hw, &cmd->header);
2395 kfree(cmd);
2396
2397 return rc;
2398 }
2399
2400 /*
2401 * CMD_SET_RATE.
2402 */
2403 struct mwl8k_cmd_update_rateset {
2404 struct mwl8k_cmd_pkt header;
2405 __u8 legacy_rates[MWL8K_RATE_INDEX_MAX_ARRAY];
2406
2407 /* Bitmap for supported MCS codes. */
2408 __u8 mcs_set[MWL8K_IEEE_LEGACY_DATA_RATES];
2409 __u8 reserved[MWL8K_IEEE_LEGACY_DATA_RATES];
2410 } __attribute__((packed));
2411
2412 static int mwl8k_update_rateset(struct ieee80211_hw *hw,
2413 struct ieee80211_vif *vif)
2414 {
2415 struct mwl8k_vif *mv_vif = MWL8K_VIF(vif);
2416 struct mwl8k_cmd_update_rateset *cmd;
2417 struct ieee80211_rate *bitrates = mv_vif->legacy_rates;
2418 int count;
2419 int rc;
2420
2421 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2422 if (cmd == NULL)
2423 return -ENOMEM;
2424
2425 cmd->header.code = cpu_to_le16(MWL8K_CMD_SET_RATE);
2426 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2427
2428 for (count = 0; count < mv_vif->legacy_nrates; count++)
2429 cmd->legacy_rates[count] = bitrates[count].hw_value;
2430
2431 rc = mwl8k_post_cmd(hw, &cmd->header);
2432 kfree(cmd);
2433
2434 return rc;
2435 }
2436
2437 /*
2438 * CMD_USE_FIXED_RATE.
2439 */
2440 #define MWL8K_RATE_TABLE_SIZE 8
2441 #define MWL8K_UCAST_RATE 0
2442 #define MWL8K_MCAST_RATE 1
2443 #define MWL8K_BCAST_RATE 2
2444
2445 #define MWL8K_USE_FIXED_RATE 0x0001
2446 #define MWL8K_USE_AUTO_RATE 0x0002
2447
2448 struct mwl8k_rate_entry {
2449 /* Set to 1 if HT rate, 0 if legacy. */
2450 __le32 is_ht_rate;
2451
2452 /* Set to 1 to use retry_count field. */
2453 __le32 enable_retry;
2454
2455 /* Specified legacy rate or MCS. */
2456 __le32 rate;
2457
2458 /* Number of allowed retries. */
2459 __le32 retry_count;
2460 } __attribute__((packed));
2461
2462 struct mwl8k_rate_table {
2463 /* 1 to allow specified rate and below */
2464 __le32 allow_rate_drop;
2465 __le32 num_rates;
2466 struct mwl8k_rate_entry rate_entry[MWL8K_RATE_TABLE_SIZE];
2467 } __attribute__((packed));
2468
2469 struct mwl8k_cmd_use_fixed_rate {
2470 struct mwl8k_cmd_pkt header;
2471 __le32 action;
2472 struct mwl8k_rate_table rate_table;
2473
2474 /* Unicast, Broadcast or Multicast */
2475 __le32 rate_type;
2476 __le32 reserved1;
2477 __le32 reserved2;
2478 } __attribute__((packed));
2479
2480 static int mwl8k_cmd_use_fixed_rate(struct ieee80211_hw *hw,
2481 u32 action, u32 rate_type, struct mwl8k_rate_table *rate_table)
2482 {
2483 struct mwl8k_cmd_use_fixed_rate *cmd;
2484 int count;
2485 int rc;
2486
2487 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
2488 if (cmd == NULL)
2489 return -ENOMEM;
2490
2491 cmd->header.code = cpu_to_le16(MWL8K_CMD_USE_FIXED_RATE);
2492 cmd->header.length = cpu_to_le16(sizeof(*cmd));
2493
2494 cmd->action = cpu_to_le32(action);
2495 cmd->rate_type = cpu_to_le32(rate_type);
2496
2497 if (rate_table != NULL) {
2498 /* Copy over each field manually so
2499 * that bitflipping can be done
2500 */
2501 cmd->rate_table.allow_rate_drop =
2502 cpu_to_le32(rate_table->allow_rate_drop);
2503 cmd->rate_table.num_rates =
2504 cpu_to_le32(rate_table->num_rates);
2505
2506 for (count = 0; count < rate_table->num_rates; count++) {
2507 struct mwl8k_rate_entry *dst =
2508 &cmd->rate_table.rate_entry[count];
2509 struct mwl8k_rate_entry *src =
2510 &rate_table->rate_entry[count];
2511
2512 dst->is_ht_rate = cpu_to_le32(src->is_ht_rate);
2513 dst->enable_retry = cpu_to_le32(src->enable_retry);
2514 dst->rate = cpu_to_le32(src->rate);
2515 dst->retry_count = cpu_to_le32(src->retry_count);
2516 }
2517 }
2518
2519 rc = mwl8k_post_cmd(hw, &cmd->header);
2520 kfree(cmd);
2521
2522 return rc;
2523 }
2524
2525
2526 /*
2527 * Interrupt handling.
2528 */
2529 static irqreturn_t mwl8k_interrupt(int irq, void *dev_id)
2530 {
2531 struct ieee80211_hw *hw = dev_id;
2532 struct mwl8k_priv *priv = hw->priv;
2533 u32 status;
2534
2535 status = ioread32(priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
2536 iowrite32(~status, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
2537
2538 status &= priv->int_mask;
2539 if (!status)
2540 return IRQ_NONE;
2541
2542 if (status & MWL8K_A2H_INT_TX_DONE)
2543 tasklet_schedule(&priv->tx_reclaim_task);
2544
2545 if (status & MWL8K_A2H_INT_RX_READY) {
2546 while (rxq_process(hw, 0, 1))
2547 rxq_refill(hw, 0, 1);
2548 }
2549
2550 if (status & MWL8K_A2H_INT_OPC_DONE) {
2551 if (priv->hostcmd_wait != NULL) {
2552 complete(priv->hostcmd_wait);
2553 priv->hostcmd_wait = NULL;
2554 }
2555 }
2556
2557 if (status & MWL8K_A2H_INT_QUEUE_EMPTY) {
2558 if (!priv->inconfig &&
2559 priv->radio_state &&
2560 mwl8k_txq_busy(priv))
2561 mwl8k_tx_start(priv);
2562 }
2563
2564 return IRQ_HANDLED;
2565 }
2566
2567
2568 /*
2569 * Core driver operations.
2570 */
2571 static int mwl8k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2572 {
2573 struct mwl8k_priv *priv = hw->priv;
2574 int index = skb_get_queue_mapping(skb);
2575 int rc;
2576
2577 if (priv->current_channel == NULL) {
2578 printk(KERN_DEBUG "%s: dropped TX frame since radio "
2579 "disabled\n", priv->name);
2580 dev_kfree_skb(skb);
2581 return NETDEV_TX_OK;
2582 }
2583
2584 rc = mwl8k_txq_xmit(hw, index, skb);
2585
2586 return rc;
2587 }
2588
2589 struct mwl8k_work_struct {
2590 /* Initialized by mwl8k_queue_work(). */
2591 struct work_struct wt;
2592
2593 /* Required field passed in to mwl8k_queue_work(). */
2594 struct ieee80211_hw *hw;
2595
2596 /* Required field passed in to mwl8k_queue_work(). */
2597 int (*wfunc)(struct work_struct *w);
2598
2599 /* Initialized by mwl8k_queue_work(). */
2600 struct completion *cmd_wait;
2601
2602 /* Result code. */
2603 int rc;
2604
2605 /*
2606 * Optional field. Refer to explanation of MWL8K_WQ_XXX_XXX
2607 * flags for explanation. Defaults to MWL8K_WQ_DEFAULT_OPTIONS.
2608 */
2609 u32 options;
2610
2611 /* Optional field. Defaults to MWL8K_CONFIG_TIMEOUT_MS. */
2612 unsigned long timeout_ms;
2613
2614 /* Optional field. Defaults to MWL8K_WQ_TXWAIT_ATTEMPTS. */
2615 u32 txwait_attempts;
2616
2617 /* Optional field. Defaults to MWL8K_TXWAIT_MS. */
2618 u32 tx_timeout_ms;
2619 u32 step;
2620 };
2621
2622 /* Flags controlling behavior of config queue requests */
2623
2624 /* Caller spins while waiting for completion. */
2625 #define MWL8K_WQ_SPIN 0x00000001
2626
2627 /* Wait for TX queues to empty before proceeding with configuration. */
2628 #define MWL8K_WQ_TX_WAIT_EMPTY 0x00000002
2629
2630 /* Queue request and return immediately. */
2631 #define MWL8K_WQ_POST_REQUEST 0x00000004
2632
2633 /*
2634 * Caller sleeps and waits for task complete notification.
2635 * Do not use in atomic context.
2636 */
2637 #define MWL8K_WQ_SLEEP 0x00000008
2638
2639 /* Free work struct when task is done. */
2640 #define MWL8K_WQ_FREE_WORKSTRUCT 0x00000010
2641
2642 /*
2643 * Config request is queued and returns to caller imediately. Use
2644 * this in atomic context. Work struct is freed by mwl8k_queue_work()
2645 * when this flag is set.
2646 */
2647 #define MWL8K_WQ_QUEUE_ONLY (MWL8K_WQ_POST_REQUEST | \
2648 MWL8K_WQ_FREE_WORKSTRUCT)
2649
2650 /* Default work queue behavior is to sleep and wait for tx completion. */
2651 #define MWL8K_WQ_DEFAULT_OPTIONS (MWL8K_WQ_SLEEP | MWL8K_WQ_TX_WAIT_EMPTY)
2652
2653 /*
2654 * Default config request timeout. Add adjustments to make sure the
2655 * config thread waits long enough for both tx wait and cmd wait before
2656 * timing out.
2657 */
2658
2659 /* Time to wait for all TXQs to drain. TX Doorbell is pressed each time. */
2660 #define MWL8K_TXWAIT_TIMEOUT_MS 1000
2661
2662 /* Default number of TX wait attempts. */
2663 #define MWL8K_WQ_TXWAIT_ATTEMPTS 4
2664
2665 /* Total time to wait for TXQ to drain. */
2666 #define MWL8K_TXWAIT_MS (MWL8K_TXWAIT_TIMEOUT_MS * \
2667 MWL8K_WQ_TXWAIT_ATTEMPTS)
2668
2669 /* Scheduling slop. */
2670 #define MWL8K_OS_SCHEDULE_OVERHEAD_MS 200
2671
2672 #define MWL8K_CONFIG_TIMEOUT_MS (MWL8K_CMD_TIMEOUT_MS + \
2673 MWL8K_TXWAIT_MS + \
2674 MWL8K_OS_SCHEDULE_OVERHEAD_MS)
2675
2676 static void mwl8k_config_thread(struct work_struct *wt)
2677 {
2678 struct mwl8k_work_struct *worker = (struct mwl8k_work_struct *)wt;
2679 struct ieee80211_hw *hw = worker->hw;
2680 struct mwl8k_priv *priv = hw->priv;
2681 int rc = 0;
2682
2683 spin_lock_irq(&priv->tx_lock);
2684 priv->inconfig = true;
2685 spin_unlock_irq(&priv->tx_lock);
2686
2687 ieee80211_stop_queues(hw);
2688
2689 /*
2690 * Wait for host queues to drain before doing PHY
2691 * reconfiguration. This avoids interrupting any in-flight
2692 * DMA transfers to the hardware.
2693 */
2694 if (worker->options & MWL8K_WQ_TX_WAIT_EMPTY) {
2695 u32 timeout;
2696 u32 time_remaining;
2697 u32 iter;
2698 u32 tx_wait_attempts = worker->txwait_attempts;
2699
2700 time_remaining = worker->tx_timeout_ms;
2701 if (!tx_wait_attempts)
2702 tx_wait_attempts = 1;
2703
2704 timeout = worker->tx_timeout_ms/tx_wait_attempts;
2705 if (!timeout)
2706 timeout = 1;
2707
2708 iter = tx_wait_attempts;
2709 do {
2710 int wait_time;
2711
2712 if (time_remaining > timeout) {
2713 time_remaining -= timeout;
2714 wait_time = timeout;
2715 } else
2716 wait_time = time_remaining;
2717
2718 if (!wait_time)
2719 wait_time = 1;
2720
2721 rc = mwl8k_tx_wait_empty(hw, wait_time);
2722 if (rc)
2723 printk(KERN_ERR "%s() txwait timeout=%ums "
2724 "Retry:%u/%u\n", __func__, timeout,
2725 tx_wait_attempts - iter + 1,
2726 tx_wait_attempts);
2727
2728 } while (rc && --iter);
2729
2730 rc = iter ? 0 : -ETIMEDOUT;
2731 }
2732 if (!rc)
2733 rc = worker->wfunc(wt);
2734
2735 spin_lock_irq(&priv->tx_lock);
2736 priv->inconfig = false;
2737 if (priv->pending_tx_pkts && priv->radio_state)
2738 mwl8k_tx_start(priv);
2739 spin_unlock_irq(&priv->tx_lock);
2740 ieee80211_wake_queues(hw);
2741
2742 worker->rc = rc;
2743 if (worker->options & MWL8K_WQ_SLEEP)
2744 complete(worker->cmd_wait);
2745
2746 if (worker->options & MWL8K_WQ_FREE_WORKSTRUCT)
2747 kfree(wt);
2748 }
2749
2750 static int mwl8k_queue_work(struct ieee80211_hw *hw,
2751 struct mwl8k_work_struct *worker,
2752 struct workqueue_struct *wqueue,
2753 int (*wfunc)(struct work_struct *w))
2754 {
2755 unsigned long timeout = 0;
2756 int rc = 0;
2757
2758 DECLARE_COMPLETION_ONSTACK(cmd_wait);
2759
2760 if (!worker->timeout_ms)
2761 worker->timeout_ms = MWL8K_CONFIG_TIMEOUT_MS;
2762
2763 if (!worker->options)
2764 worker->options = MWL8K_WQ_DEFAULT_OPTIONS;
2765
2766 if (!worker->txwait_attempts)
2767 worker->txwait_attempts = MWL8K_WQ_TXWAIT_ATTEMPTS;
2768
2769 if (!worker->tx_timeout_ms)
2770 worker->tx_timeout_ms = MWL8K_TXWAIT_MS;
2771
2772 worker->hw = hw;
2773 worker->cmd_wait = &cmd_wait;
2774 worker->rc = 1;
2775 worker->wfunc = wfunc;
2776
2777 INIT_WORK(&worker->wt, mwl8k_config_thread);
2778 queue_work(wqueue, &worker->wt);
2779
2780 if (worker->options & MWL8K_WQ_POST_REQUEST) {
2781 rc = 0;
2782 } else {
2783 if (worker->options & MWL8K_WQ_SPIN) {
2784 timeout = worker->timeout_ms;
2785 while (timeout && (worker->rc > 0)) {
2786 mdelay(1);
2787 timeout--;
2788 }
2789 } else if (worker->options & MWL8K_WQ_SLEEP)
2790 timeout = wait_for_completion_timeout(&cmd_wait,
2791 msecs_to_jiffies(worker->timeout_ms));
2792
2793 if (timeout)
2794 rc = worker->rc;
2795 else {
2796 cancel_work_sync(&worker->wt);
2797 rc = -ETIMEDOUT;
2798 }
2799 }
2800
2801 return rc;
2802 }
2803
2804 struct mwl8k_start_worker {
2805 struct mwl8k_work_struct header;
2806 };
2807
2808 static int mwl8k_start_wt(struct work_struct *wt)
2809 {
2810 struct mwl8k_start_worker *worker = (struct mwl8k_start_worker *)wt;
2811 struct ieee80211_hw *hw = worker->header.hw;
2812 struct mwl8k_priv *priv = hw->priv;
2813 int rc = 0;
2814
2815 if (priv->vif != NULL) {
2816 rc = -EIO;
2817 goto mwl8k_start_exit;
2818 }
2819
2820 /* Turn on radio */
2821 if (mwl8k_cmd_802_11_radio_control(hw, MWL8K_RADIO_ENABLE)) {
2822 rc = -EIO;
2823 goto mwl8k_start_exit;
2824 }
2825
2826 /* Purge TX/RX HW queues */
2827 if (mwl8k_cmd_set_pre_scan(hw)) {
2828 rc = -EIO;
2829 goto mwl8k_start_exit;
2830 }
2831
2832 if (mwl8k_cmd_set_post_scan(hw, "\x00\x00\x00\x00\x00\x00")) {
2833 rc = -EIO;
2834 goto mwl8k_start_exit;
2835 }
2836
2837 /* Enable firmware rate adaptation */
2838 if (mwl8k_cmd_setrateadaptmode(hw, 0)) {
2839 rc = -EIO;
2840 goto mwl8k_start_exit;
2841 }
2842
2843 /* Disable WMM. WMM gets enabled when stack sends WMM parms */
2844 if (mwl8k_set_wmm(hw, MWL8K_WMM_DISABLE)) {
2845 rc = -EIO;
2846 goto mwl8k_start_exit;
2847 }
2848
2849 /* Disable sniffer mode */
2850 if (mwl8k_enable_sniffer(hw, 0))
2851 rc = -EIO;
2852
2853 mwl8k_start_exit:
2854 return rc;
2855 }
2856
2857 static int mwl8k_start(struct ieee80211_hw *hw)
2858 {
2859 struct mwl8k_start_worker *worker;
2860 struct mwl8k_priv *priv = hw->priv;
2861 int rc;
2862
2863 /* Enable tx reclaim tasklet */
2864 tasklet_enable(&priv->tx_reclaim_task);
2865
2866 rc = request_irq(priv->pdev->irq, &mwl8k_interrupt,
2867 IRQF_SHARED, MWL8K_NAME, hw);
2868 if (rc) {
2869 printk(KERN_ERR "%s: failed to register IRQ handler\n",
2870 priv->name);
2871 rc = -EIO;
2872 goto mwl8k_start_disable_tasklet;
2873 }
2874
2875 /* Enable interrupts */
2876 iowrite32(priv->int_mask, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
2877
2878 worker = kzalloc(sizeof(*worker), GFP_KERNEL);
2879 if (worker == NULL) {
2880 rc = -ENOMEM;
2881 goto mwl8k_start_disable_irq;
2882 }
2883
2884 rc = mwl8k_queue_work(hw, &worker->header,
2885 priv->config_wq, mwl8k_start_wt);
2886 kfree(worker);
2887 if (!rc)
2888 return rc;
2889
2890 if (rc == -ETIMEDOUT)
2891 printk(KERN_ERR "%s() timed out\n", __func__);
2892
2893 rc = -EIO;
2894
2895 mwl8k_start_disable_irq:
2896 spin_lock_irq(&priv->tx_lock);
2897 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
2898 spin_unlock_irq(&priv->tx_lock);
2899 free_irq(priv->pdev->irq, hw);
2900
2901 mwl8k_start_disable_tasklet:
2902 tasklet_disable(&priv->tx_reclaim_task);
2903
2904 return rc;
2905 }
2906
2907 struct mwl8k_stop_worker {
2908 struct mwl8k_work_struct header;
2909 };
2910
2911 static int mwl8k_stop_wt(struct work_struct *wt)
2912 {
2913 struct mwl8k_stop_worker *worker = (struct mwl8k_stop_worker *)wt;
2914 struct ieee80211_hw *hw = worker->header.hw;
2915 int rc;
2916
2917 rc = mwl8k_cmd_802_11_radio_control(hw, MWL8K_RADIO_DISABLE);
2918
2919 return rc;
2920 }
2921
2922 static void mwl8k_stop(struct ieee80211_hw *hw)
2923 {
2924 int rc;
2925 struct mwl8k_stop_worker *worker;
2926 struct mwl8k_priv *priv = hw->priv;
2927 int i;
2928
2929 if (priv->vif != NULL)
2930 return;
2931
2932 ieee80211_stop_queues(hw);
2933
2934 worker = kzalloc(sizeof(*worker), GFP_KERNEL);
2935 if (worker == NULL)
2936 return;
2937
2938 rc = mwl8k_queue_work(hw, &worker->header,
2939 priv->config_wq, mwl8k_stop_wt);
2940 kfree(worker);
2941 if (rc == -ETIMEDOUT)
2942 printk(KERN_ERR "%s() timed out\n", __func__);
2943
2944 /* Disable interrupts */
2945 spin_lock_irq(&priv->tx_lock);
2946 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
2947 spin_unlock_irq(&priv->tx_lock);
2948 free_irq(priv->pdev->irq, hw);
2949
2950 /* Stop finalize join worker */
2951 cancel_work_sync(&priv->finalize_join_worker);
2952 if (priv->beacon_skb != NULL)
2953 dev_kfree_skb(priv->beacon_skb);
2954
2955 /* Stop tx reclaim tasklet */
2956 tasklet_disable(&priv->tx_reclaim_task);
2957
2958 /* Stop config thread */
2959 flush_workqueue(priv->config_wq);
2960
2961 /* Return all skbs to mac80211 */
2962 for (i = 0; i < MWL8K_TX_QUEUES; i++)
2963 mwl8k_txq_reclaim(hw, i, 1);
2964 }
2965
2966 static int mwl8k_add_interface(struct ieee80211_hw *hw,
2967 struct ieee80211_if_init_conf *conf)
2968 {
2969 struct mwl8k_priv *priv = hw->priv;
2970 struct mwl8k_vif *mwl8k_vif;
2971
2972 /*
2973 * We only support one active interface at a time.
2974 */
2975 if (priv->vif != NULL)
2976 return -EBUSY;
2977
2978 /*
2979 * We only support managed interfaces for now.
2980 */
2981 if (conf->type != NL80211_IFTYPE_STATION &&
2982 conf->type != NL80211_IFTYPE_MONITOR)
2983 return -EINVAL;
2984
2985 /* Clean out driver private area */
2986 mwl8k_vif = MWL8K_VIF(conf->vif);
2987 memset(mwl8k_vif, 0, sizeof(*mwl8k_vif));
2988
2989 /* Save the mac address */
2990 memcpy(mwl8k_vif->mac_addr, conf->mac_addr, IEEE80211_ADDR_LEN);
2991
2992 /* Back pointer to parent config block */
2993 mwl8k_vif->priv = priv;
2994
2995 /* Setup initial PHY parameters */
2996 memcpy(mwl8k_vif->legacy_rates ,
2997 priv->rates, sizeof(mwl8k_vif->legacy_rates));
2998 mwl8k_vif->legacy_nrates = ARRAY_SIZE(priv->rates);
2999
3000 /* Set Initial sequence number to zero */
3001 mwl8k_vif->seqno = 0;
3002
3003 priv->vif = conf->vif;
3004 priv->current_channel = NULL;
3005
3006 return 0;
3007 }
3008
3009 static void mwl8k_remove_interface(struct ieee80211_hw *hw,
3010 struct ieee80211_if_init_conf *conf)
3011 {
3012 struct mwl8k_priv *priv = hw->priv;
3013
3014 if (priv->vif == NULL)
3015 return;
3016
3017 priv->vif = NULL;
3018 }
3019
3020 struct mwl8k_config_worker {
3021 struct mwl8k_work_struct header;
3022 u32 changed;
3023 };
3024
3025 static int mwl8k_config_wt(struct work_struct *wt)
3026 {
3027 struct mwl8k_config_worker *worker =
3028 (struct mwl8k_config_worker *)wt;
3029 struct ieee80211_hw *hw = worker->header.hw;
3030 struct ieee80211_conf *conf = &hw->conf;
3031 struct mwl8k_priv *priv = hw->priv;
3032 int rc = 0;
3033
3034 if (!conf->radio_enabled) {
3035 mwl8k_cmd_802_11_radio_control(hw, MWL8K_RADIO_DISABLE);
3036 priv->current_channel = NULL;
3037 rc = 0;
3038 goto mwl8k_config_exit;
3039 }
3040
3041 if (mwl8k_cmd_802_11_radio_control(hw, MWL8K_RADIO_ENABLE)) {
3042 rc = -EINVAL;
3043 goto mwl8k_config_exit;
3044 }
3045
3046 priv->current_channel = conf->channel;
3047
3048 if (mwl8k_cmd_set_rf_channel(hw, conf->channel)) {
3049 rc = -EINVAL;
3050 goto mwl8k_config_exit;
3051 }
3052
3053 if (conf->power_level > 18)
3054 conf->power_level = 18;
3055 if (mwl8k_cmd_802_11_rf_tx_power(hw, conf->power_level)) {
3056 rc = -EINVAL;
3057 goto mwl8k_config_exit;
3058 }
3059
3060 if (mwl8k_cmd_mimo_config(hw, 0x7, 0x7))
3061 rc = -EINVAL;
3062
3063 mwl8k_config_exit:
3064 return rc;
3065 }
3066
3067 static int mwl8k_config(struct ieee80211_hw *hw, u32 changed)
3068 {
3069 int rc = 0;
3070 struct mwl8k_config_worker *worker;
3071 struct mwl8k_priv *priv = hw->priv;
3072
3073 worker = kzalloc(sizeof(*worker), GFP_KERNEL);
3074 if (worker == NULL)
3075 return -ENOMEM;
3076
3077 worker->changed = changed;
3078 rc = mwl8k_queue_work(hw, &worker->header,
3079 priv->config_wq, mwl8k_config_wt);
3080 if (rc == -ETIMEDOUT) {
3081 printk(KERN_ERR "%s() timed out.\n", __func__);
3082 rc = -EINVAL;
3083 }
3084
3085 kfree(worker);
3086
3087 /*
3088 * mac80211 will crash on anything other than -EINVAL on
3089 * error. Looks like wireless extensions which calls mac80211
3090 * may be the actual culprit...
3091 */
3092 return rc ? -EINVAL : 0;
3093 }
3094
3095 struct mwl8k_bss_info_changed_worker {
3096 struct mwl8k_work_struct header;
3097 struct ieee80211_vif *vif;
3098 struct ieee80211_bss_conf *info;
3099 u32 changed;
3100 };
3101
3102 static int mwl8k_bss_info_changed_wt(struct work_struct *wt)
3103 {
3104 struct mwl8k_bss_info_changed_worker *worker =
3105 (struct mwl8k_bss_info_changed_worker *)wt;
3106 struct ieee80211_hw *hw = worker->header.hw;
3107 struct ieee80211_vif *vif = worker->vif;
3108 struct ieee80211_bss_conf *info = worker->info;
3109 u32 changed;
3110 int rc;
3111
3112 struct mwl8k_priv *priv = hw->priv;
3113 struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
3114
3115 changed = worker->changed;
3116 priv->capture_beacon = false;
3117
3118 if (info->assoc) {
3119 memcpy(&mwl8k_vif->bss_info, info,
3120 sizeof(struct ieee80211_bss_conf));
3121
3122 /* Install rates */
3123 if (mwl8k_update_rateset(hw, vif))
3124 goto mwl8k_bss_info_changed_exit;
3125
3126 /* Turn on rate adaptation */
3127 if (mwl8k_cmd_use_fixed_rate(hw, MWL8K_USE_AUTO_RATE,
3128 MWL8K_UCAST_RATE, NULL))
3129 goto mwl8k_bss_info_changed_exit;
3130
3131 /* Set radio preamble */
3132 if (mwl8k_set_radio_preamble(hw,
3133 info->use_short_preamble))
3134 goto mwl8k_bss_info_changed_exit;
3135
3136 /* Set slot time */
3137 if (mwl8k_cmd_set_slot(hw, info->use_short_slot ?
3138 MWL8K_SHORT_SLOTTIME : MWL8K_LONG_SLOTTIME))
3139 goto mwl8k_bss_info_changed_exit;
3140
3141 /* Update peer rate info */
3142 if (mwl8k_cmd_update_sta_db(hw, vif,
3143 MWL8K_STA_DB_MODIFY_ENTRY))
3144 goto mwl8k_bss_info_changed_exit;
3145
3146 /* Set AID */
3147 if (mwl8k_cmd_set_aid(hw, vif))
3148 goto mwl8k_bss_info_changed_exit;
3149
3150 /*
3151 * Finalize the join. Tell rx handler to process
3152 * next beacon from our BSSID.
3153 */
3154 memcpy(priv->capture_bssid,
3155 mwl8k_vif->bssid, IEEE80211_ADDR_LEN);
3156 priv->capture_beacon = true;
3157 } else {
3158 mwl8k_cmd_update_sta_db(hw, vif, MWL8K_STA_DB_DEL_ENTRY);
3159 memset(&mwl8k_vif->bss_info, 0,
3160 sizeof(struct ieee80211_bss_conf));
3161 memset(mwl8k_vif->bssid, 0, IEEE80211_ADDR_LEN);
3162 }
3163
3164 mwl8k_bss_info_changed_exit:
3165 rc = 0;
3166 return rc;
3167 }
3168
3169 static void mwl8k_bss_info_changed(struct ieee80211_hw *hw,
3170 struct ieee80211_vif *vif,
3171 struct ieee80211_bss_conf *info,
3172 u32 changed)
3173 {
3174 struct mwl8k_bss_info_changed_worker *worker;
3175 struct mwl8k_priv *priv = hw->priv;
3176 struct mwl8k_vif *mv_vif = MWL8K_VIF(vif);
3177 int rc;
3178
3179 if (changed & BSS_CHANGED_BSSID)
3180 memcpy(mv_vif->bssid, info->bssid, IEEE80211_ADDR_LEN);
3181
3182 if ((changed & BSS_CHANGED_ASSOC) == 0)
3183 return;
3184
3185 worker = kzalloc(sizeof(*worker), GFP_KERNEL);
3186 if (worker == NULL)
3187 return;
3188
3189 worker->vif = vif;
3190 worker->info = info;
3191 worker->changed = changed;
3192 rc = mwl8k_queue_work(hw, &worker->header,
3193 priv->config_wq,
3194 mwl8k_bss_info_changed_wt);
3195 kfree(worker);
3196 if (rc == -ETIMEDOUT)
3197 printk(KERN_ERR "%s() timed out\n", __func__);
3198 }
3199
3200 struct mwl8k_configure_filter_worker {
3201 struct mwl8k_work_struct header;
3202 unsigned int changed_flags;
3203 unsigned int *total_flags;
3204 int mc_count;
3205 struct dev_addr_list *mclist;
3206 };
3207
3208 #define MWL8K_SUPPORTED_IF_FLAGS FIF_BCN_PRBRESP_PROMISC
3209
3210 static int mwl8k_configure_filter_wt(struct work_struct *wt)
3211 {
3212 struct mwl8k_configure_filter_worker *worker =
3213 (struct mwl8k_configure_filter_worker *)wt;
3214
3215 struct ieee80211_hw *hw = worker->header.hw;
3216 unsigned int changed_flags = worker->changed_flags;
3217 unsigned int *total_flags = worker->total_flags;
3218 int mc_count = worker->mc_count;
3219 struct dev_addr_list *mclist = worker->mclist;
3220
3221 struct mwl8k_priv *priv = hw->priv;
3222 int rc = 0;
3223
3224 if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
3225 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
3226 rc = mwl8k_cmd_set_pre_scan(hw);
3227 else {
3228 u8 *bssid;
3229
3230 bssid = "\x00\x00\x00\x00\x00\x00";
3231 if (priv->vif != NULL)
3232 bssid = MWL8K_VIF(priv->vif)->bssid;
3233
3234 rc = mwl8k_cmd_set_post_scan(hw, bssid);
3235 }
3236 }
3237
3238 if (rc)
3239 goto mwl8k_configure_filter_exit;
3240 if (mc_count) {
3241 mc_count = mc_count < priv->num_mcaddrs ?
3242 mc_count : priv->num_mcaddrs;
3243 rc = mwl8k_cmd_mac_multicast_adr(hw, mc_count, mclist);
3244 if (rc)
3245 printk(KERN_ERR
3246 "%s()Error setting multicast addresses\n",
3247 __func__);
3248 }
3249
3250 mwl8k_configure_filter_exit:
3251 return rc;
3252 }
3253
3254 static u64 mwl8k_prepare_multicast(struct ieee80211_hw *hw,
3255 int mc_count, struct dev_addr_list *mclist)
3256 {
3257 struct mwl8k_configure_filter_worker *worker;
3258
3259 worker = kzalloc(sizeof(*worker), GFP_ATOMIC);
3260
3261 if (!worker)
3262 return 0;
3263
3264 /*
3265 * XXX: This is _HORRIBLY_ broken!!
3266 *
3267 * No locking, the mclist pointer might be invalid as soon as this
3268 * function returns, something in the list might be invalidated
3269 * once we get to the worker, etc...
3270 */
3271 worker->mc_count = mc_count;
3272 worker->mclist = mclist;
3273
3274 return (u64)worker;
3275 }
3276
3277 static void mwl8k_configure_filter(struct ieee80211_hw *hw,
3278 unsigned int changed_flags,
3279 unsigned int *total_flags,
3280 u64 multicast)
3281 {
3282
3283 struct mwl8k_configure_filter_worker *worker = (void *)multicast;
3284 struct mwl8k_priv *priv = hw->priv;
3285
3286 /* Clear unsupported feature flags */
3287 *total_flags &= MWL8K_SUPPORTED_IF_FLAGS;
3288
3289 if (!(changed_flags & MWL8K_SUPPORTED_IF_FLAGS))
3290 return;
3291
3292 if (worker == NULL)
3293 return;
3294
3295 worker->header.options = MWL8K_WQ_QUEUE_ONLY | MWL8K_WQ_TX_WAIT_EMPTY;
3296 worker->changed_flags = changed_flags;
3297 worker->total_flags = total_flags;
3298
3299 mwl8k_queue_work(hw, &worker->header, priv->config_wq,
3300 mwl8k_configure_filter_wt);
3301 }
3302
3303 struct mwl8k_set_rts_threshold_worker {
3304 struct mwl8k_work_struct header;
3305 u32 value;
3306 };
3307
3308 static int mwl8k_set_rts_threshold_wt(struct work_struct *wt)
3309 {
3310 struct mwl8k_set_rts_threshold_worker *worker =
3311 (struct mwl8k_set_rts_threshold_worker *)wt;
3312
3313 struct ieee80211_hw *hw = worker->header.hw;
3314 u16 threshold = (u16)(worker->value);
3315 int rc;
3316
3317 rc = mwl8k_rts_threshold(hw, MWL8K_CMD_SET, &threshold);
3318
3319 return rc;
3320 }
3321
3322 static int mwl8k_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
3323 {
3324 int rc;
3325 struct mwl8k_set_rts_threshold_worker *worker;
3326 struct mwl8k_priv *priv = hw->priv;
3327
3328 worker = kzalloc(sizeof(*worker), GFP_KERNEL);
3329 if (worker == NULL)
3330 return -ENOMEM;
3331
3332 worker->value = value;
3333
3334 rc = mwl8k_queue_work(hw, &worker->header,
3335 priv->config_wq,
3336 mwl8k_set_rts_threshold_wt);
3337 kfree(worker);
3338
3339 if (rc == -ETIMEDOUT) {
3340 printk(KERN_ERR "%s() timed out\n", __func__);
3341 rc = -EINVAL;
3342 }
3343
3344 return rc;
3345 }
3346
3347 struct mwl8k_conf_tx_worker {
3348 struct mwl8k_work_struct header;
3349 u16 queue;
3350 const struct ieee80211_tx_queue_params *params;
3351 };
3352
3353 static int mwl8k_conf_tx_wt(struct work_struct *wt)
3354 {
3355 struct mwl8k_conf_tx_worker *worker =
3356 (struct mwl8k_conf_tx_worker *)wt;
3357
3358 struct ieee80211_hw *hw = worker->header.hw;
3359 u16 queue = worker->queue;
3360 const struct ieee80211_tx_queue_params *params = worker->params;
3361
3362 struct mwl8k_priv *priv = hw->priv;
3363 int rc = 0;
3364
3365 if (priv->wmm_mode == MWL8K_WMM_DISABLE)
3366 if (mwl8k_set_wmm(hw, MWL8K_WMM_ENABLE)) {
3367 rc = -EINVAL;
3368 goto mwl8k_conf_tx_exit;
3369 }
3370
3371 if (mwl8k_set_edca_params(hw, GET_TXQ(queue), params->cw_min,
3372 params->cw_max, params->aifs, params->txop))
3373 rc = -EINVAL;
3374 mwl8k_conf_tx_exit:
3375 return rc;
3376 }
3377
3378 static int mwl8k_conf_tx(struct ieee80211_hw *hw, u16 queue,
3379 const struct ieee80211_tx_queue_params *params)
3380 {
3381 int rc;
3382 struct mwl8k_conf_tx_worker *worker;
3383 struct mwl8k_priv *priv = hw->priv;
3384
3385 worker = kzalloc(sizeof(*worker), GFP_KERNEL);
3386 if (worker == NULL)
3387 return -ENOMEM;
3388
3389 worker->queue = queue;
3390 worker->params = params;
3391 rc = mwl8k_queue_work(hw, &worker->header,
3392 priv->config_wq, mwl8k_conf_tx_wt);
3393 kfree(worker);
3394 if (rc == -ETIMEDOUT) {
3395 printk(KERN_ERR "%s() timed out\n", __func__);
3396 rc = -EINVAL;
3397 }
3398 return rc;
3399 }
3400
3401 static int mwl8k_get_tx_stats(struct ieee80211_hw *hw,
3402 struct ieee80211_tx_queue_stats *stats)
3403 {
3404 struct mwl8k_priv *priv = hw->priv;
3405 struct mwl8k_tx_queue *txq;
3406 int index;
3407
3408 spin_lock_bh(&priv->tx_lock);
3409 for (index = 0; index < MWL8K_TX_QUEUES; index++) {
3410 txq = priv->txq + index;
3411 memcpy(&stats[index], &txq->tx_stats,
3412 sizeof(struct ieee80211_tx_queue_stats));
3413 }
3414 spin_unlock_bh(&priv->tx_lock);
3415 return 0;
3416 }
3417
3418 struct mwl8k_get_stats_worker {
3419 struct mwl8k_work_struct header;
3420 struct ieee80211_low_level_stats *stats;
3421 };
3422
3423 static int mwl8k_get_stats_wt(struct work_struct *wt)
3424 {
3425 struct mwl8k_get_stats_worker *worker =
3426 (struct mwl8k_get_stats_worker *)wt;
3427
3428 return mwl8k_cmd_802_11_get_stat(worker->header.hw, worker->stats);
3429 }
3430
3431 static int mwl8k_get_stats(struct ieee80211_hw *hw,
3432 struct ieee80211_low_level_stats *stats)
3433 {
3434 int rc;
3435 struct mwl8k_get_stats_worker *worker;
3436 struct mwl8k_priv *priv = hw->priv;
3437
3438 worker = kzalloc(sizeof(*worker), GFP_KERNEL);
3439 if (worker == NULL)
3440 return -ENOMEM;
3441
3442 worker->stats = stats;
3443 rc = mwl8k_queue_work(hw, &worker->header,
3444 priv->config_wq, mwl8k_get_stats_wt);
3445
3446 kfree(worker);
3447 if (rc == -ETIMEDOUT) {
3448 printk(KERN_ERR "%s() timed out\n", __func__);
3449 rc = -EINVAL;
3450 }
3451
3452 return rc;
3453 }
3454
3455 static const struct ieee80211_ops mwl8k_ops = {
3456 .tx = mwl8k_tx,
3457 .start = mwl8k_start,
3458 .stop = mwl8k_stop,
3459 .add_interface = mwl8k_add_interface,
3460 .remove_interface = mwl8k_remove_interface,
3461 .config = mwl8k_config,
3462 .bss_info_changed = mwl8k_bss_info_changed,
3463 .prepare_multicast = mwl8k_prepare_multicast,
3464 .configure_filter = mwl8k_configure_filter,
3465 .set_rts_threshold = mwl8k_set_rts_threshold,
3466 .conf_tx = mwl8k_conf_tx,
3467 .get_tx_stats = mwl8k_get_tx_stats,
3468 .get_stats = mwl8k_get_stats,
3469 };
3470
3471 static void mwl8k_tx_reclaim_handler(unsigned long data)
3472 {
3473 int i;
3474 struct ieee80211_hw *hw = (struct ieee80211_hw *) data;
3475 struct mwl8k_priv *priv = hw->priv;
3476
3477 spin_lock_bh(&priv->tx_lock);
3478 for (i = 0; i < MWL8K_TX_QUEUES; i++)
3479 mwl8k_txq_reclaim(hw, i, 0);
3480
3481 if (priv->tx_wait != NULL) {
3482 int count = mwl8k_txq_busy(priv);
3483 if (count == 0) {
3484 complete(priv->tx_wait);
3485 priv->tx_wait = NULL;
3486 }
3487 }
3488 spin_unlock_bh(&priv->tx_lock);
3489 }
3490
3491 static void mwl8k_finalize_join_worker(struct work_struct *work)
3492 {
3493 struct mwl8k_priv *priv =
3494 container_of(work, struct mwl8k_priv, finalize_join_worker);
3495 struct sk_buff *skb = priv->beacon_skb;
3496 u8 dtim = (MWL8K_VIF(priv->vif))->bss_info.dtim_period;
3497
3498 mwl8k_finalize_join(priv->hw, skb->data, skb->len, dtim);
3499 dev_kfree_skb(skb);
3500
3501 priv->beacon_skb = NULL;
3502 }
3503
3504 static int __devinit mwl8k_probe(struct pci_dev *pdev,
3505 const struct pci_device_id *id)
3506 {
3507 struct ieee80211_hw *hw;
3508 struct mwl8k_priv *priv;
3509 int rc;
3510 int i;
3511 u8 *fw;
3512
3513 rc = pci_enable_device(pdev);
3514 if (rc) {
3515 printk(KERN_ERR "%s: Cannot enable new PCI device\n",
3516 MWL8K_NAME);
3517 return rc;
3518 }
3519
3520 rc = pci_request_regions(pdev, MWL8K_NAME);
3521 if (rc) {
3522 printk(KERN_ERR "%s: Cannot obtain PCI resources\n",
3523 MWL8K_NAME);
3524 return rc;
3525 }
3526
3527 pci_set_master(pdev);
3528
3529 hw = ieee80211_alloc_hw(sizeof(*priv), &mwl8k_ops);
3530 if (hw == NULL) {
3531 printk(KERN_ERR "%s: ieee80211 alloc failed\n", MWL8K_NAME);
3532 rc = -ENOMEM;
3533 goto err_free_reg;
3534 }
3535
3536 priv = hw->priv;
3537 priv->hw = hw;
3538 priv->pdev = pdev;
3539 priv->hostcmd_wait = NULL;
3540 priv->tx_wait = NULL;
3541 priv->inconfig = false;
3542 priv->wep_enabled = 0;
3543 priv->wmm_mode = false;
3544 priv->pending_tx_pkts = 0;
3545 strncpy(priv->name, MWL8K_NAME, sizeof(priv->name));
3546
3547 spin_lock_init(&priv->fw_lock);
3548
3549 SET_IEEE80211_DEV(hw, &pdev->dev);
3550 pci_set_drvdata(pdev, hw);
3551
3552 priv->regs = pci_iomap(pdev, 1, 0x10000);
3553 if (priv->regs == NULL) {
3554 printk(KERN_ERR "%s: Cannot map device memory\n", priv->name);
3555 goto err_iounmap;
3556 }
3557
3558 memcpy(priv->channels, mwl8k_channels, sizeof(mwl8k_channels));
3559 priv->band.band = IEEE80211_BAND_2GHZ;
3560 priv->band.channels = priv->channels;
3561 priv->band.n_channels = ARRAY_SIZE(mwl8k_channels);
3562 priv->band.bitrates = priv->rates;
3563 priv->band.n_bitrates = ARRAY_SIZE(mwl8k_rates);
3564 hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->band;
3565
3566 BUILD_BUG_ON(sizeof(priv->rates) != sizeof(mwl8k_rates));
3567 memcpy(priv->rates, mwl8k_rates, sizeof(mwl8k_rates));
3568
3569 /*
3570 * Extra headroom is the size of the required DMA header
3571 * minus the size of the smallest 802.11 frame (CTS frame).
3572 */
3573 hw->extra_tx_headroom =
3574 sizeof(struct mwl8k_dma_data) - sizeof(struct ieee80211_cts);
3575
3576 hw->channel_change_time = 10;
3577
3578 hw->queues = MWL8K_TX_QUEUES;
3579
3580 hw->wiphy->interface_modes =
3581 BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_MONITOR);
3582
3583 /* Set rssi and noise values to dBm */
3584 hw->flags |= (IEEE80211_HW_SIGNAL_DBM | IEEE80211_HW_NOISE_DBM);
3585 hw->vif_data_size = sizeof(struct mwl8k_vif);
3586 priv->vif = NULL;
3587
3588 /* Set default radio state and preamble */
3589 priv->radio_preamble = MWL8K_RADIO_DEFAULT_PREAMBLE;
3590 priv->radio_state = MWL8K_RADIO_DISABLE;
3591
3592 /* Finalize join worker */
3593 INIT_WORK(&priv->finalize_join_worker, mwl8k_finalize_join_worker);
3594
3595 /* TX reclaim tasklet */
3596 tasklet_init(&priv->tx_reclaim_task,
3597 mwl8k_tx_reclaim_handler, (unsigned long)hw);
3598 tasklet_disable(&priv->tx_reclaim_task);
3599
3600 /* Config workthread */
3601 priv->config_wq = create_singlethread_workqueue("mwl8k_config");
3602 if (priv->config_wq == NULL)
3603 goto err_iounmap;
3604
3605 /* Power management cookie */
3606 priv->cookie = pci_alloc_consistent(priv->pdev, 4, &priv->cookie_dma);
3607 if (priv->cookie == NULL)
3608 goto err_iounmap;
3609
3610 rc = mwl8k_rxq_init(hw, 0);
3611 if (rc)
3612 goto err_iounmap;
3613 rxq_refill(hw, 0, INT_MAX);
3614
3615 spin_lock_init(&priv->tx_lock);
3616
3617 for (i = 0; i < MWL8K_TX_QUEUES; i++) {
3618 rc = mwl8k_txq_init(hw, i);
3619 if (rc)
3620 goto err_free_queues;
3621 }
3622
3623 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS);
3624 priv->int_mask = 0;
3625 iowrite32(priv->int_mask, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
3626 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_CLEAR_SEL);
3627 iowrite32(0xffffffff, priv->regs + MWL8K_HIU_A2H_INTERRUPT_STATUS_MASK);
3628
3629 rc = request_irq(priv->pdev->irq, &mwl8k_interrupt,
3630 IRQF_SHARED, MWL8K_NAME, hw);
3631 if (rc) {
3632 printk(KERN_ERR "%s: failed to register IRQ handler\n",
3633 priv->name);
3634 goto err_free_queues;
3635 }
3636
3637 /* Reset firmware and hardware */
3638 mwl8k_hw_reset(priv);
3639
3640 /* Ask userland hotplug daemon for the device firmware */
3641 rc = mwl8k_request_firmware(priv, (u32)id->driver_data);
3642 if (rc) {
3643 printk(KERN_ERR "%s: Firmware files not found\n", priv->name);
3644 goto err_free_irq;
3645 }
3646
3647 /* Load firmware into hardware */
3648 rc = mwl8k_load_firmware(priv);
3649 if (rc) {
3650 printk(KERN_ERR "%s: Cannot start firmware\n", priv->name);
3651 goto err_stop_firmware;
3652 }
3653
3654 /* Reclaim memory once firmware is successfully loaded */
3655 mwl8k_release_firmware(priv);
3656
3657 /*
3658 * Temporarily enable interrupts. Initial firmware host
3659 * commands use interrupts and avoids polling. Disable
3660 * interrupts when done.
3661 */
3662 priv->int_mask |= MWL8K_A2H_EVENTS;
3663
3664 iowrite32(priv->int_mask, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
3665
3666 /* Get config data, mac addrs etc */
3667 rc = mwl8k_cmd_get_hw_spec(hw);
3668 if (rc) {
3669 printk(KERN_ERR "%s: Cannot initialise firmware\n", priv->name);
3670 goto err_stop_firmware;
3671 }
3672
3673 /* Turn radio off */
3674 rc = mwl8k_cmd_802_11_radio_control(hw, MWL8K_RADIO_DISABLE);
3675 if (rc) {
3676 printk(KERN_ERR "%s: Cannot disable\n", priv->name);
3677 goto err_stop_firmware;
3678 }
3679
3680 /* Disable interrupts */
3681 spin_lock_irq(&priv->tx_lock);
3682 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
3683 spin_unlock_irq(&priv->tx_lock);
3684 free_irq(priv->pdev->irq, hw);
3685
3686 rc = ieee80211_register_hw(hw);
3687 if (rc) {
3688 printk(KERN_ERR "%s: Cannot register device\n", priv->name);
3689 goto err_stop_firmware;
3690 }
3691
3692 fw = (u8 *)&priv->fw_rev;
3693 printk(KERN_INFO "%s: 88W%u %s\n", priv->name, priv->part_num,
3694 MWL8K_DESC);
3695 printk(KERN_INFO "%s: Driver Ver:%s Firmware Ver:%u.%u.%u.%u\n",
3696 priv->name, MWL8K_VERSION, fw[3], fw[2], fw[1], fw[0]);
3697 printk(KERN_INFO "%s: MAC Address: %pM\n", priv->name,
3698 hw->wiphy->perm_addr);
3699
3700 return 0;
3701
3702 err_stop_firmware:
3703 mwl8k_hw_reset(priv);
3704 mwl8k_release_firmware(priv);
3705
3706 err_free_irq:
3707 spin_lock_irq(&priv->tx_lock);
3708 iowrite32(0, priv->regs + MWL8K_HIU_A2H_INTERRUPT_MASK);
3709 spin_unlock_irq(&priv->tx_lock);
3710 free_irq(priv->pdev->irq, hw);
3711
3712 err_free_queues:
3713 for (i = 0; i < MWL8K_TX_QUEUES; i++)
3714 mwl8k_txq_deinit(hw, i);
3715 mwl8k_rxq_deinit(hw, 0);
3716
3717 err_iounmap:
3718 if (priv->cookie != NULL)
3719 pci_free_consistent(priv->pdev, 4,
3720 priv->cookie, priv->cookie_dma);
3721
3722 if (priv->regs != NULL)
3723 pci_iounmap(pdev, priv->regs);
3724
3725 if (priv->config_wq != NULL)
3726 destroy_workqueue(priv->config_wq);
3727
3728 pci_set_drvdata(pdev, NULL);
3729 ieee80211_free_hw(hw);
3730
3731 err_free_reg:
3732 pci_release_regions(pdev);
3733 pci_disable_device(pdev);
3734
3735 return rc;
3736 }
3737
3738 static void __devexit mwl8k_shutdown(struct pci_dev *pdev)
3739 {
3740 printk(KERN_ERR "===>%s(%u)\n", __func__, __LINE__);
3741 }
3742
3743 static void __devexit mwl8k_remove(struct pci_dev *pdev)
3744 {
3745 struct ieee80211_hw *hw = pci_get_drvdata(pdev);
3746 struct mwl8k_priv *priv;
3747 int i;
3748
3749 if (hw == NULL)
3750 return;
3751 priv = hw->priv;
3752
3753 ieee80211_stop_queues(hw);
3754
3755 ieee80211_unregister_hw(hw);
3756
3757 /* Remove tx reclaim tasklet */
3758 tasklet_kill(&priv->tx_reclaim_task);
3759
3760 /* Stop config thread */
3761 destroy_workqueue(priv->config_wq);
3762
3763 /* Stop hardware */
3764 mwl8k_hw_reset(priv);
3765
3766 /* Return all skbs to mac80211 */
3767 for (i = 0; i < MWL8K_TX_QUEUES; i++)
3768 mwl8k_txq_reclaim(hw, i, 1);
3769
3770 for (i = 0; i < MWL8K_TX_QUEUES; i++)
3771 mwl8k_txq_deinit(hw, i);
3772
3773 mwl8k_rxq_deinit(hw, 0);
3774
3775 pci_free_consistent(priv->pdev, 4,
3776 priv->cookie, priv->cookie_dma);
3777
3778 pci_iounmap(pdev, priv->regs);
3779 pci_set_drvdata(pdev, NULL);
3780 ieee80211_free_hw(hw);
3781 pci_release_regions(pdev);
3782 pci_disable_device(pdev);
3783 }
3784
3785 static struct pci_driver mwl8k_driver = {
3786 .name = MWL8K_NAME,
3787 .id_table = mwl8k_table,
3788 .probe = mwl8k_probe,
3789 .remove = __devexit_p(mwl8k_remove),
3790 .shutdown = __devexit_p(mwl8k_shutdown),
3791 };
3792
3793 static int __init mwl8k_init(void)
3794 {
3795 return pci_register_driver(&mwl8k_driver);
3796 }
3797
3798 static void __exit mwl8k_exit(void)
3799 {
3800 pci_unregister_driver(&mwl8k_driver);
3801 }
3802
3803 module_init(mwl8k_init);
3804 module_exit(mwl8k_exit);
Linux kernel - Deliverables
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