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initial commit with v3.6.7
[linux-3.6.7-moxart.git] / drivers / net / wireless / iwlegacy / common.c
blob0370403fd0bd5d2345704f8fc766c5ad2260a7dc
1 /******************************************************************************
2 *
3 * GPL LICENSE SUMMARY
4 *
5 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of version 2 of the GNU General Public License as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
19 * USA
20 *
21 * The full GNU General Public License is included in this distribution
22 * in the file called LICENSE.GPL.
23 *
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *****************************************************************************/
28
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/etherdevice.h>
32 #include <linux/sched.h>
33 #include <linux/slab.h>
34 #include <linux/types.h>
35 #include <linux/lockdep.h>
36 #include <linux/init.h>
37 #include <linux/pci.h>
38 #include <linux/dma-mapping.h>
39 #include <linux/delay.h>
40 #include <linux/skbuff.h>
41 #include <net/mac80211.h>
42
43 #include "common.h"
44
45 int
46 _il_poll_bit(struct il_priv *il, u32 addr, u32 bits, u32 mask, int timeout)
47 {
48 const int interval = 10; /* microseconds */
49 int t = 0;
50
51 do {
52 if ((_il_rd(il, addr) & mask) == (bits & mask))
53 return t;
54 udelay(interval);
55 t += interval;
56 } while (t < timeout);
57
58 return -ETIMEDOUT;
59 }
60 EXPORT_SYMBOL(_il_poll_bit);
61
62 void
63 il_set_bit(struct il_priv *p, u32 r, u32 m)
64 {
65 unsigned long reg_flags;
66
67 spin_lock_irqsave(&p->reg_lock, reg_flags);
68 _il_set_bit(p, r, m);
69 spin_unlock_irqrestore(&p->reg_lock, reg_flags);
70 }
71 EXPORT_SYMBOL(il_set_bit);
72
73 void
74 il_clear_bit(struct il_priv *p, u32 r, u32 m)
75 {
76 unsigned long reg_flags;
77
78 spin_lock_irqsave(&p->reg_lock, reg_flags);
79 _il_clear_bit(p, r, m);
80 spin_unlock_irqrestore(&p->reg_lock, reg_flags);
81 }
82 EXPORT_SYMBOL(il_clear_bit);
83
84 bool
85 _il_grab_nic_access(struct il_priv *il)
86 {
87 int ret;
88 u32 val;
89
90 /* this bit wakes up the NIC */
91 _il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
92
93 /*
94 * These bits say the device is running, and should keep running for
95 * at least a short while (at least as long as MAC_ACCESS_REQ stays 1),
96 * but they do not indicate that embedded SRAM is restored yet;
97 * 3945 and 4965 have volatile SRAM, and must save/restore contents
98 * to/from host DRAM when sleeping/waking for power-saving.
99 * Each direction takes approximately 1/4 millisecond; with this
100 * overhead, it's a good idea to grab and hold MAC_ACCESS_REQUEST if a
101 * series of register accesses are expected (e.g. reading Event Log),
102 * to keep device from sleeping.
103 *
104 * CSR_UCODE_DRV_GP1 register bit MAC_SLEEP == 0 indicates that
105 * SRAM is okay/restored. We don't check that here because this call
106 * is just for hardware register access; but GP1 MAC_SLEEP check is a
107 * good idea before accessing 3945/4965 SRAM (e.g. reading Event Log).
108 *
109 */
110 ret =
111 _il_poll_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN,
112 (CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
113 CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000);
114 if (unlikely(ret < 0)) {
115 val = _il_rd(il, CSR_GP_CNTRL);
116 WARN_ONCE(1, "Timeout waiting for ucode processor access "
117 "(CSR_GP_CNTRL 0x%08x)\n", val);
118 _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_FORCE_NMI);
119 return false;
120 }
121
122 return true;
123 }
124 EXPORT_SYMBOL_GPL(_il_grab_nic_access);
125
126 int
127 il_poll_bit(struct il_priv *il, u32 addr, u32 mask, int timeout)
128 {
129 const int interval = 10; /* microseconds */
130 int t = 0;
131
132 do {
133 if ((il_rd(il, addr) & mask) == mask)
134 return t;
135 udelay(interval);
136 t += interval;
137 } while (t < timeout);
138
139 return -ETIMEDOUT;
140 }
141 EXPORT_SYMBOL(il_poll_bit);
142
143 u32
144 il_rd_prph(struct il_priv *il, u32 reg)
145 {
146 unsigned long reg_flags;
147 u32 val;
148
149 spin_lock_irqsave(&il->reg_lock, reg_flags);
150 _il_grab_nic_access(il);
151 val = _il_rd_prph(il, reg);
152 _il_release_nic_access(il);
153 spin_unlock_irqrestore(&il->reg_lock, reg_flags);
154 return val;
155 }
156 EXPORT_SYMBOL(il_rd_prph);
157
158 void
159 il_wr_prph(struct il_priv *il, u32 addr, u32 val)
160 {
161 unsigned long reg_flags;
162
163 spin_lock_irqsave(&il->reg_lock, reg_flags);
164 if (likely(_il_grab_nic_access(il))) {
165 _il_wr_prph(il, addr, val);
166 _il_release_nic_access(il);
167 }
168 spin_unlock_irqrestore(&il->reg_lock, reg_flags);
169 }
170 EXPORT_SYMBOL(il_wr_prph);
171
172 u32
173 il_read_targ_mem(struct il_priv *il, u32 addr)
174 {
175 unsigned long reg_flags;
176 u32 value;
177
178 spin_lock_irqsave(&il->reg_lock, reg_flags);
179 _il_grab_nic_access(il);
180
181 _il_wr(il, HBUS_TARG_MEM_RADDR, addr);
182 value = _il_rd(il, HBUS_TARG_MEM_RDAT);
183
184 _il_release_nic_access(il);
185 spin_unlock_irqrestore(&il->reg_lock, reg_flags);
186 return value;
187 }
188 EXPORT_SYMBOL(il_read_targ_mem);
189
190 void
191 il_write_targ_mem(struct il_priv *il, u32 addr, u32 val)
192 {
193 unsigned long reg_flags;
194
195 spin_lock_irqsave(&il->reg_lock, reg_flags);
196 if (likely(_il_grab_nic_access(il))) {
197 _il_wr(il, HBUS_TARG_MEM_WADDR, addr);
198 _il_wr(il, HBUS_TARG_MEM_WDAT, val);
199 _il_release_nic_access(il);
200 }
201 spin_unlock_irqrestore(&il->reg_lock, reg_flags);
202 }
203 EXPORT_SYMBOL(il_write_targ_mem);
204
205 const char *
206 il_get_cmd_string(u8 cmd)
207 {
208 switch (cmd) {
209 IL_CMD(N_ALIVE);
210 IL_CMD(N_ERROR);
211 IL_CMD(C_RXON);
212 IL_CMD(C_RXON_ASSOC);
213 IL_CMD(C_QOS_PARAM);
214 IL_CMD(C_RXON_TIMING);
215 IL_CMD(C_ADD_STA);
216 IL_CMD(C_REM_STA);
217 IL_CMD(C_WEPKEY);
218 IL_CMD(N_3945_RX);
219 IL_CMD(C_TX);
220 IL_CMD(C_RATE_SCALE);
221 IL_CMD(C_LEDS);
222 IL_CMD(C_TX_LINK_QUALITY_CMD);
223 IL_CMD(C_CHANNEL_SWITCH);
224 IL_CMD(N_CHANNEL_SWITCH);
225 IL_CMD(C_SPECTRUM_MEASUREMENT);
226 IL_CMD(N_SPECTRUM_MEASUREMENT);
227 IL_CMD(C_POWER_TBL);
228 IL_CMD(N_PM_SLEEP);
229 IL_CMD(N_PM_DEBUG_STATS);
230 IL_CMD(C_SCAN);
231 IL_CMD(C_SCAN_ABORT);
232 IL_CMD(N_SCAN_START);
233 IL_CMD(N_SCAN_RESULTS);
234 IL_CMD(N_SCAN_COMPLETE);
235 IL_CMD(N_BEACON);
236 IL_CMD(C_TX_BEACON);
237 IL_CMD(C_TX_PWR_TBL);
238 IL_CMD(C_BT_CONFIG);
239 IL_CMD(C_STATS);
240 IL_CMD(N_STATS);
241 IL_CMD(N_CARD_STATE);
242 IL_CMD(N_MISSED_BEACONS);
243 IL_CMD(C_CT_KILL_CONFIG);
244 IL_CMD(C_SENSITIVITY);
245 IL_CMD(C_PHY_CALIBRATION);
246 IL_CMD(N_RX_PHY);
247 IL_CMD(N_RX_MPDU);
248 IL_CMD(N_RX);
249 IL_CMD(N_COMPRESSED_BA);
250 default:
251 return "UNKNOWN";
252
253 }
254 }
255 EXPORT_SYMBOL(il_get_cmd_string);
256
257 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
258
259 static void
260 il_generic_cmd_callback(struct il_priv *il, struct il_device_cmd *cmd,
261 struct il_rx_pkt *pkt)
262 {
263 if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
264 IL_ERR("Bad return from %s (0x%08X)\n",
265 il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
266 return;
267 }
268 #ifdef CONFIG_IWLEGACY_DEBUG
269 switch (cmd->hdr.cmd) {
270 case C_TX_LINK_QUALITY_CMD:
271 case C_SENSITIVITY:
272 D_HC_DUMP("back from %s (0x%08X)\n",
273 il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
274 break;
275 default:
276 D_HC("back from %s (0x%08X)\n", il_get_cmd_string(cmd->hdr.cmd),
277 pkt->hdr.flags);
278 }
279 #endif
280 }
281
282 static int
283 il_send_cmd_async(struct il_priv *il, struct il_host_cmd *cmd)
284 {
285 int ret;
286
287 BUG_ON(!(cmd->flags & CMD_ASYNC));
288
289 /* An asynchronous command can not expect an SKB to be set. */
290 BUG_ON(cmd->flags & CMD_WANT_SKB);
291
292 /* Assign a generic callback if one is not provided */
293 if (!cmd->callback)
294 cmd->callback = il_generic_cmd_callback;
295
296 if (test_bit(S_EXIT_PENDING, &il->status))
297 return -EBUSY;
298
299 ret = il_enqueue_hcmd(il, cmd);
300 if (ret < 0) {
301 IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n",
302 il_get_cmd_string(cmd->id), ret);
303 return ret;
304 }
305 return 0;
306 }
307
308 int
309 il_send_cmd_sync(struct il_priv *il, struct il_host_cmd *cmd)
310 {
311 int cmd_idx;
312 int ret;
313
314 lockdep_assert_held(&il->mutex);
315
316 BUG_ON(cmd->flags & CMD_ASYNC);
317
318 /* A synchronous command can not have a callback set. */
319 BUG_ON(cmd->callback);
320
321 D_INFO("Attempting to send sync command %s\n",
322 il_get_cmd_string(cmd->id));
323
324 set_bit(S_HCMD_ACTIVE, &il->status);
325 D_INFO("Setting HCMD_ACTIVE for command %s\n",
326 il_get_cmd_string(cmd->id));
327
328 cmd_idx = il_enqueue_hcmd(il, cmd);
329 if (cmd_idx < 0) {
330 ret = cmd_idx;
331 IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n",
332 il_get_cmd_string(cmd->id), ret);
333 goto out;
334 }
335
336 ret = wait_event_timeout(il->wait_command_queue,
337 !test_bit(S_HCMD_ACTIVE, &il->status),
338 HOST_COMPLETE_TIMEOUT);
339 if (!ret) {
340 if (test_bit(S_HCMD_ACTIVE, &il->status)) {
341 IL_ERR("Error sending %s: time out after %dms.\n",
342 il_get_cmd_string(cmd->id),
343 jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
344
345 clear_bit(S_HCMD_ACTIVE, &il->status);
346 D_INFO("Clearing HCMD_ACTIVE for command %s\n",
347 il_get_cmd_string(cmd->id));
348 ret = -ETIMEDOUT;
349 goto cancel;
350 }
351 }
352
353 if (test_bit(S_RFKILL, &il->status)) {
354 IL_ERR("Command %s aborted: RF KILL Switch\n",
355 il_get_cmd_string(cmd->id));
356 ret = -ECANCELED;
357 goto fail;
358 }
359 if (test_bit(S_FW_ERROR, &il->status)) {
360 IL_ERR("Command %s failed: FW Error\n",
361 il_get_cmd_string(cmd->id));
362 ret = -EIO;
363 goto fail;
364 }
365 if ((cmd->flags & CMD_WANT_SKB) && !cmd->reply_page) {
366 IL_ERR("Error: Response NULL in '%s'\n",
367 il_get_cmd_string(cmd->id));
368 ret = -EIO;
369 goto cancel;
370 }
371
372 ret = 0;
373 goto out;
374
375 cancel:
376 if (cmd->flags & CMD_WANT_SKB) {
377 /*
378 * Cancel the CMD_WANT_SKB flag for the cmd in the
379 * TX cmd queue. Otherwise in case the cmd comes
380 * in later, it will possibly set an invalid
381 * address (cmd->meta.source).
382 */
383 il->txq[il->cmd_queue].meta[cmd_idx].flags &= ~CMD_WANT_SKB;
384 }
385 fail:
386 if (cmd->reply_page) {
387 il_free_pages(il, cmd->reply_page);
388 cmd->reply_page = 0;
389 }
390 out:
391 return ret;
392 }
393 EXPORT_SYMBOL(il_send_cmd_sync);
394
395 int
396 il_send_cmd(struct il_priv *il, struct il_host_cmd *cmd)
397 {
398 if (cmd->flags & CMD_ASYNC)
399 return il_send_cmd_async(il, cmd);
400
401 return il_send_cmd_sync(il, cmd);
402 }
403 EXPORT_SYMBOL(il_send_cmd);
404
405 int
406 il_send_cmd_pdu(struct il_priv *il, u8 id, u16 len, const void *data)
407 {
408 struct il_host_cmd cmd = {
409 .id = id,
410 .len = len,
411 .data = data,
412 };
413
414 return il_send_cmd_sync(il, &cmd);
415 }
416 EXPORT_SYMBOL(il_send_cmd_pdu);
417
418 int
419 il_send_cmd_pdu_async(struct il_priv *il, u8 id, u16 len, const void *data,
420 void (*callback) (struct il_priv *il,
421 struct il_device_cmd *cmd,
422 struct il_rx_pkt *pkt))
423 {
424 struct il_host_cmd cmd = {
425 .id = id,
426 .len = len,
427 .data = data,
428 };
429
430 cmd.flags |= CMD_ASYNC;
431 cmd.callback = callback;
432
433 return il_send_cmd_async(il, &cmd);
434 }
435 EXPORT_SYMBOL(il_send_cmd_pdu_async);
436
437 /* default: IL_LED_BLINK(0) using blinking idx table */
438 static int led_mode;
439 module_param(led_mode, int, S_IRUGO);
440 MODULE_PARM_DESC(led_mode,
441 "0=system default, " "1=On(RF On)/Off(RF Off), 2=blinking");
442
443 /* Throughput OFF time(ms) ON time (ms)
444 * >300 25 25
445 * >200 to 300 40 40
446 * >100 to 200 55 55
447 * >70 to 100 65 65
448 * >50 to 70 75 75
449 * >20 to 50 85 85
450 * >10 to 20 95 95
451 * >5 to 10 110 110
452 * >1 to 5 130 130
453 * >0 to 1 167 167
454 * <=0 SOLID ON
455 */
456 static const struct ieee80211_tpt_blink il_blink[] = {
457 {.throughput = 0, .blink_time = 334},
458 {.throughput = 1 * 1024 - 1, .blink_time = 260},
459 {.throughput = 5 * 1024 - 1, .blink_time = 220},
460 {.throughput = 10 * 1024 - 1, .blink_time = 190},
461 {.throughput = 20 * 1024 - 1, .blink_time = 170},
462 {.throughput = 50 * 1024 - 1, .blink_time = 150},
463 {.throughput = 70 * 1024 - 1, .blink_time = 130},
464 {.throughput = 100 * 1024 - 1, .blink_time = 110},
465 {.throughput = 200 * 1024 - 1, .blink_time = 80},
466 {.throughput = 300 * 1024 - 1, .blink_time = 50},
467 };
468
469 /*
470 * Adjust led blink rate to compensate on a MAC Clock difference on every HW
471 * Led blink rate analysis showed an average deviation of 0% on 3945,
472 * 5% on 4965 HW.
473 * Need to compensate on the led on/off time per HW according to the deviation
474 * to achieve the desired led frequency
475 * The calculation is: (100-averageDeviation)/100 * blinkTime
476 * For code efficiency the calculation will be:
477 * compensation = (100 - averageDeviation) * 64 / 100
478 * NewBlinkTime = (compensation * BlinkTime) / 64
479 */
480 static inline u8
481 il_blink_compensation(struct il_priv *il, u8 time, u16 compensation)
482 {
483 if (!compensation) {
484 IL_ERR("undefined blink compensation: "
485 "use pre-defined blinking time\n");
486 return time;
487 }
488
489 return (u8) ((time * compensation) >> 6);
490 }
491
492 /* Set led pattern command */
493 static int
494 il_led_cmd(struct il_priv *il, unsigned long on, unsigned long off)
495 {
496 struct il_led_cmd led_cmd = {
497 .id = IL_LED_LINK,
498 .interval = IL_DEF_LED_INTRVL
499 };
500 int ret;
501
502 if (!test_bit(S_READY, &il->status))
503 return -EBUSY;
504
505 if (il->blink_on == on && il->blink_off == off)
506 return 0;
507
508 if (off == 0) {
509 /* led is SOLID_ON */
510 on = IL_LED_SOLID;
511 }
512
513 D_LED("Led blink time compensation=%u\n",
514 il->cfg->led_compensation);
515 led_cmd.on =
516 il_blink_compensation(il, on,
517 il->cfg->led_compensation);
518 led_cmd.off =
519 il_blink_compensation(il, off,
520 il->cfg->led_compensation);
521
522 ret = il->ops->send_led_cmd(il, &led_cmd);
523 if (!ret) {
524 il->blink_on = on;
525 il->blink_off = off;
526 }
527 return ret;
528 }
529
530 static void
531 il_led_brightness_set(struct led_classdev *led_cdev,
532 enum led_brightness brightness)
533 {
534 struct il_priv *il = container_of(led_cdev, struct il_priv, led);
535 unsigned long on = 0;
536
537 if (brightness > 0)
538 on = IL_LED_SOLID;
539
540 il_led_cmd(il, on, 0);
541 }
542
543 static int
544 il_led_blink_set(struct led_classdev *led_cdev, unsigned long *delay_on,
545 unsigned long *delay_off)
546 {
547 struct il_priv *il = container_of(led_cdev, struct il_priv, led);
548
549 return il_led_cmd(il, *delay_on, *delay_off);
550 }
551
552 void
553 il_leds_init(struct il_priv *il)
554 {
555 int mode = led_mode;
556 int ret;
557
558 if (mode == IL_LED_DEFAULT)
559 mode = il->cfg->led_mode;
560
561 il->led.name =
562 kasprintf(GFP_KERNEL, "%s-led", wiphy_name(il->hw->wiphy));
563 il->led.brightness_set = il_led_brightness_set;
564 il->led.blink_set = il_led_blink_set;
565 il->led.max_brightness = 1;
566
567 switch (mode) {
568 case IL_LED_DEFAULT:
569 WARN_ON(1);
570 break;
571 case IL_LED_BLINK:
572 il->led.default_trigger =
573 ieee80211_create_tpt_led_trigger(il->hw,
574 IEEE80211_TPT_LEDTRIG_FL_CONNECTED,
575 il_blink,
576 ARRAY_SIZE(il_blink));
577 break;
578 case IL_LED_RF_STATE:
579 il->led.default_trigger = ieee80211_get_radio_led_name(il->hw);
580 break;
581 }
582
583 ret = led_classdev_register(&il->pci_dev->dev, &il->led);
584 if (ret) {
585 kfree(il->led.name);
586 return;
587 }
588
589 il->led_registered = true;
590 }
591 EXPORT_SYMBOL(il_leds_init);
592
593 void
594 il_leds_exit(struct il_priv *il)
595 {
596 if (!il->led_registered)
597 return;
598
599 led_classdev_unregister(&il->led);
600 kfree(il->led.name);
601 }
602 EXPORT_SYMBOL(il_leds_exit);
603
604 /************************** EEPROM BANDS ****************************
605 *
606 * The il_eeprom_band definitions below provide the mapping from the
607 * EEPROM contents to the specific channel number supported for each
608 * band.
609 *
610 * For example, il_priv->eeprom.band_3_channels[4] from the band_3
611 * definition below maps to physical channel 42 in the 5.2GHz spectrum.
612 * The specific geography and calibration information for that channel
613 * is contained in the eeprom map itself.
614 *
615 * During init, we copy the eeprom information and channel map
616 * information into il->channel_info_24/52 and il->channel_map_24/52
617 *
618 * channel_map_24/52 provides the idx in the channel_info array for a
619 * given channel. We have to have two separate maps as there is channel
620 * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
621 * band_2
622 *
623 * A value of 0xff stored in the channel_map indicates that the channel
624 * is not supported by the hardware at all.
625 *
626 * A value of 0xfe in the channel_map indicates that the channel is not
627 * valid for Tx with the current hardware. This means that
628 * while the system can tune and receive on a given channel, it may not
629 * be able to associate or transmit any frames on that
630 * channel. There is no corresponding channel information for that
631 * entry.
632 *
633 *********************************************************************/
634
635 /* 2.4 GHz */
636 const u8 il_eeprom_band_1[14] = {
637 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
638 };
639
640 /* 5.2 GHz bands */
641 static const u8 il_eeprom_band_2[] = { /* 4915-5080MHz */
642 183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
643 };
644
645 static const u8 il_eeprom_band_3[] = { /* 5170-5320MHz */
646 34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
647 };
648
649 static const u8 il_eeprom_band_4[] = { /* 5500-5700MHz */
650 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
651 };
652
653 static const u8 il_eeprom_band_5[] = { /* 5725-5825MHz */
654 145, 149, 153, 157, 161, 165
655 };
656
657 static const u8 il_eeprom_band_6[] = { /* 2.4 ht40 channel */
658 1, 2, 3, 4, 5, 6, 7
659 };
660
661 static const u8 il_eeprom_band_7[] = { /* 5.2 ht40 channel */
662 36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
663 };
664
665 /******************************************************************************
666 *
667 * EEPROM related functions
668 *
669 ******************************************************************************/
670
671 static int
672 il_eeprom_verify_signature(struct il_priv *il)
673 {
674 u32 gp = _il_rd(il, CSR_EEPROM_GP) & CSR_EEPROM_GP_VALID_MSK;
675 int ret = 0;
676
677 D_EEPROM("EEPROM signature=0x%08x\n", gp);
678 switch (gp) {
679 case CSR_EEPROM_GP_GOOD_SIG_EEP_LESS_THAN_4K:
680 case CSR_EEPROM_GP_GOOD_SIG_EEP_MORE_THAN_4K:
681 break;
682 default:
683 IL_ERR("bad EEPROM signature," "EEPROM_GP=0x%08x\n", gp);
684 ret = -ENOENT;
685 break;
686 }
687 return ret;
688 }
689
690 const u8 *
691 il_eeprom_query_addr(const struct il_priv *il, size_t offset)
692 {
693 BUG_ON(offset >= il->cfg->eeprom_size);
694 return &il->eeprom[offset];
695 }
696 EXPORT_SYMBOL(il_eeprom_query_addr);
697
698 u16
699 il_eeprom_query16(const struct il_priv *il, size_t offset)
700 {
701 if (!il->eeprom)
702 return 0;
703 return (u16) il->eeprom[offset] | ((u16) il->eeprom[offset + 1] << 8);
704 }
705 EXPORT_SYMBOL(il_eeprom_query16);
706
707 /**
708 * il_eeprom_init - read EEPROM contents
709 *
710 * Load the EEPROM contents from adapter into il->eeprom
711 *
712 * NOTE: This routine uses the non-debug IO access functions.
713 */
714 int
715 il_eeprom_init(struct il_priv *il)
716 {
717 __le16 *e;
718 u32 gp = _il_rd(il, CSR_EEPROM_GP);
719 int sz;
720 int ret;
721 u16 addr;
722
723 /* allocate eeprom */
724 sz = il->cfg->eeprom_size;
725 D_EEPROM("NVM size = %d\n", sz);
726 il->eeprom = kzalloc(sz, GFP_KERNEL);
727 if (!il->eeprom) {
728 ret = -ENOMEM;
729 goto alloc_err;
730 }
731 e = (__le16 *) il->eeprom;
732
733 il->ops->apm_init(il);
734
735 ret = il_eeprom_verify_signature(il);
736 if (ret < 0) {
737 IL_ERR("EEPROM not found, EEPROM_GP=0x%08x\n", gp);
738 ret = -ENOENT;
739 goto err;
740 }
741
742 /* Make sure driver (instead of uCode) is allowed to read EEPROM */
743 ret = il->ops->eeprom_acquire_semaphore(il);
744 if (ret < 0) {
745 IL_ERR("Failed to acquire EEPROM semaphore.\n");
746 ret = -ENOENT;
747 goto err;
748 }
749
750 /* eeprom is an array of 16bit values */
751 for (addr = 0; addr < sz; addr += sizeof(u16)) {
752 u32 r;
753
754 _il_wr(il, CSR_EEPROM_REG,
755 CSR_EEPROM_REG_MSK_ADDR & (addr << 1));
756
757 ret =
758 _il_poll_bit(il, CSR_EEPROM_REG,
759 CSR_EEPROM_REG_READ_VALID_MSK,
760 CSR_EEPROM_REG_READ_VALID_MSK,
761 IL_EEPROM_ACCESS_TIMEOUT);
762 if (ret < 0) {
763 IL_ERR("Time out reading EEPROM[%d]\n", addr);
764 goto done;
765 }
766 r = _il_rd(il, CSR_EEPROM_REG);
767 e[addr / 2] = cpu_to_le16(r >> 16);
768 }
769
770 D_EEPROM("NVM Type: %s, version: 0x%x\n", "EEPROM",
771 il_eeprom_query16(il, EEPROM_VERSION));
772
773 ret = 0;
774 done:
775 il->ops->eeprom_release_semaphore(il);
776
777 err:
778 if (ret)
779 il_eeprom_free(il);
780 /* Reset chip to save power until we load uCode during "up". */
781 il_apm_stop(il);
782 alloc_err:
783 return ret;
784 }
785 EXPORT_SYMBOL(il_eeprom_init);
786
787 void
788 il_eeprom_free(struct il_priv *il)
789 {
790 kfree(il->eeprom);
791 il->eeprom = NULL;
792 }
793 EXPORT_SYMBOL(il_eeprom_free);
794
795 static void
796 il_init_band_reference(const struct il_priv *il, int eep_band,
797 int *eeprom_ch_count,
798 const struct il_eeprom_channel **eeprom_ch_info,
799 const u8 **eeprom_ch_idx)
800 {
801 u32 offset = il->cfg->regulatory_bands[eep_band - 1];
802
803 switch (eep_band) {
804 case 1: /* 2.4GHz band */
805 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_1);
806 *eeprom_ch_info =
807 (struct il_eeprom_channel *)il_eeprom_query_addr(il,
808 offset);
809 *eeprom_ch_idx = il_eeprom_band_1;
810 break;
811 case 2: /* 4.9GHz band */
812 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_2);
813 *eeprom_ch_info =
814 (struct il_eeprom_channel *)il_eeprom_query_addr(il,
815 offset);
816 *eeprom_ch_idx = il_eeprom_band_2;
817 break;
818 case 3: /* 5.2GHz band */
819 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_3);
820 *eeprom_ch_info =
821 (struct il_eeprom_channel *)il_eeprom_query_addr(il,
822 offset);
823 *eeprom_ch_idx = il_eeprom_band_3;
824 break;
825 case 4: /* 5.5GHz band */
826 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_4);
827 *eeprom_ch_info =
828 (struct il_eeprom_channel *)il_eeprom_query_addr(il,
829 offset);
830 *eeprom_ch_idx = il_eeprom_band_4;
831 break;
832 case 5: /* 5.7GHz band */
833 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_5);
834 *eeprom_ch_info =
835 (struct il_eeprom_channel *)il_eeprom_query_addr(il,
836 offset);
837 *eeprom_ch_idx = il_eeprom_band_5;
838 break;
839 case 6: /* 2.4GHz ht40 channels */
840 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_6);
841 *eeprom_ch_info =
842 (struct il_eeprom_channel *)il_eeprom_query_addr(il,
843 offset);
844 *eeprom_ch_idx = il_eeprom_band_6;
845 break;
846 case 7: /* 5 GHz ht40 channels */
847 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_7);
848 *eeprom_ch_info =
849 (struct il_eeprom_channel *)il_eeprom_query_addr(il,
850 offset);
851 *eeprom_ch_idx = il_eeprom_band_7;
852 break;
853 default:
854 BUG();
855 }
856 }
857
858 #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
859 ? # x " " : "")
860 /**
861 * il_mod_ht40_chan_info - Copy ht40 channel info into driver's il.
862 *
863 * Does not set up a command, or touch hardware.
864 */
865 static int
866 il_mod_ht40_chan_info(struct il_priv *il, enum ieee80211_band band, u16 channel,
867 const struct il_eeprom_channel *eeprom_ch,
868 u8 clear_ht40_extension_channel)
869 {
870 struct il_channel_info *ch_info;
871
872 ch_info =
873 (struct il_channel_info *)il_get_channel_info(il, band, channel);
874
875 if (!il_is_channel_valid(ch_info))
876 return -1;
877
878 D_EEPROM("HT40 Ch. %d [%sGHz] %s%s%s%s%s(0x%02x %ddBm):"
879 " Ad-Hoc %ssupported\n", ch_info->channel,
880 il_is_channel_a_band(ch_info) ? "5.2" : "2.4",
881 CHECK_AND_PRINT(IBSS), CHECK_AND_PRINT(ACTIVE),
882 CHECK_AND_PRINT(RADAR), CHECK_AND_PRINT(WIDE),
883 CHECK_AND_PRINT(DFS), eeprom_ch->flags,
884 eeprom_ch->max_power_avg,
885 ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS) &&
886 !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ? "" : "not ");
887
888 ch_info->ht40_eeprom = *eeprom_ch;
889 ch_info->ht40_max_power_avg = eeprom_ch->max_power_avg;
890 ch_info->ht40_flags = eeprom_ch->flags;
891 if (eeprom_ch->flags & EEPROM_CHANNEL_VALID)
892 ch_info->ht40_extension_channel &=
893 ~clear_ht40_extension_channel;
894
895 return 0;
896 }
897
898 #define CHECK_AND_PRINT_I(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
899 ? # x " " : "")
900
901 /**
902 * il_init_channel_map - Set up driver's info for all possible channels
903 */
904 int
905 il_init_channel_map(struct il_priv *il)
906 {
907 int eeprom_ch_count = 0;
908 const u8 *eeprom_ch_idx = NULL;
909 const struct il_eeprom_channel *eeprom_ch_info = NULL;
910 int band, ch;
911 struct il_channel_info *ch_info;
912
913 if (il->channel_count) {
914 D_EEPROM("Channel map already initialized.\n");
915 return 0;
916 }
917
918 D_EEPROM("Initializing regulatory info from EEPROM\n");
919
920 il->channel_count =
921 ARRAY_SIZE(il_eeprom_band_1) + ARRAY_SIZE(il_eeprom_band_2) +
922 ARRAY_SIZE(il_eeprom_band_3) + ARRAY_SIZE(il_eeprom_band_4) +
923 ARRAY_SIZE(il_eeprom_band_5);
924
925 D_EEPROM("Parsing data for %d channels.\n", il->channel_count);
926
927 il->channel_info =
928 kzalloc(sizeof(struct il_channel_info) * il->channel_count,
929 GFP_KERNEL);
930 if (!il->channel_info) {
931 IL_ERR("Could not allocate channel_info\n");
932 il->channel_count = 0;
933 return -ENOMEM;
934 }
935
936 ch_info = il->channel_info;
937
938 /* Loop through the 5 EEPROM bands adding them in order to the
939 * channel map we maintain (that contains additional information than
940 * what just in the EEPROM) */
941 for (band = 1; band <= 5; band++) {
942
943 il_init_band_reference(il, band, &eeprom_ch_count,
944 &eeprom_ch_info, &eeprom_ch_idx);
945
946 /* Loop through each band adding each of the channels */
947 for (ch = 0; ch < eeprom_ch_count; ch++) {
948 ch_info->channel = eeprom_ch_idx[ch];
949 ch_info->band =
950 (band ==
951 1) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
952
953 /* permanently store EEPROM's channel regulatory flags
954 * and max power in channel info database. */
955 ch_info->eeprom = eeprom_ch_info[ch];
956
957 /* Copy the run-time flags so they are there even on
958 * invalid channels */
959 ch_info->flags = eeprom_ch_info[ch].flags;
960 /* First write that ht40 is not enabled, and then enable
961 * one by one */
962 ch_info->ht40_extension_channel =
963 IEEE80211_CHAN_NO_HT40;
964
965 if (!(il_is_channel_valid(ch_info))) {
966 D_EEPROM("Ch. %d Flags %x [%sGHz] - "
967 "No traffic\n", ch_info->channel,
968 ch_info->flags,
969 il_is_channel_a_band(ch_info) ? "5.2" :
970 "2.4");
971 ch_info++;
972 continue;
973 }
974
975 /* Initialize regulatory-based run-time data */
976 ch_info->max_power_avg = ch_info->curr_txpow =
977 eeprom_ch_info[ch].max_power_avg;
978 ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
979 ch_info->min_power = 0;
980
981 D_EEPROM("Ch. %d [%sGHz] " "%s%s%s%s%s%s(0x%02x %ddBm):"
982 " Ad-Hoc %ssupported\n", ch_info->channel,
983 il_is_channel_a_band(ch_info) ? "5.2" : "2.4",
984 CHECK_AND_PRINT_I(VALID),
985 CHECK_AND_PRINT_I(IBSS),
986 CHECK_AND_PRINT_I(ACTIVE),
987 CHECK_AND_PRINT_I(RADAR),
988 CHECK_AND_PRINT_I(WIDE),
989 CHECK_AND_PRINT_I(DFS),
990 eeprom_ch_info[ch].flags,
991 eeprom_ch_info[ch].max_power_avg,
992 ((eeprom_ch_info[ch].
993 flags & EEPROM_CHANNEL_IBSS) &&
994 !(eeprom_ch_info[ch].
995 flags & EEPROM_CHANNEL_RADAR)) ? "" :
996 "not ");
997
998 ch_info++;
999 }
1000 }
1001
1002 /* Check if we do have HT40 channels */
1003 if (il->cfg->regulatory_bands[5] == EEPROM_REGULATORY_BAND_NO_HT40 &&
1004 il->cfg->regulatory_bands[6] == EEPROM_REGULATORY_BAND_NO_HT40)
1005 return 0;
1006
1007 /* Two additional EEPROM bands for 2.4 and 5 GHz HT40 channels */
1008 for (band = 6; band <= 7; band++) {
1009 enum ieee80211_band ieeeband;
1010
1011 il_init_band_reference(il, band, &eeprom_ch_count,
1012 &eeprom_ch_info, &eeprom_ch_idx);
1013
1014 /* EEPROM band 6 is 2.4, band 7 is 5 GHz */
1015 ieeeband =
1016 (band == 6) ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
1017
1018 /* Loop through each band adding each of the channels */
1019 for (ch = 0; ch < eeprom_ch_count; ch++) {
1020 /* Set up driver's info for lower half */
1021 il_mod_ht40_chan_info(il, ieeeband, eeprom_ch_idx[ch],
1022 &eeprom_ch_info[ch],
1023 IEEE80211_CHAN_NO_HT40PLUS);
1024
1025 /* Set up driver's info for upper half */
1026 il_mod_ht40_chan_info(il, ieeeband,
1027 eeprom_ch_idx[ch] + 4,
1028 &eeprom_ch_info[ch],
1029 IEEE80211_CHAN_NO_HT40MINUS);
1030 }
1031 }
1032
1033 return 0;
1034 }
1035 EXPORT_SYMBOL(il_init_channel_map);
1036
1037 /*
1038 * il_free_channel_map - undo allocations in il_init_channel_map
1039 */
1040 void
1041 il_free_channel_map(struct il_priv *il)
1042 {
1043 kfree(il->channel_info);
1044 il->channel_count = 0;
1045 }
1046 EXPORT_SYMBOL(il_free_channel_map);
1047
1048 /**
1049 * il_get_channel_info - Find driver's ilate channel info
1050 *
1051 * Based on band and channel number.
1052 */
1053 const struct il_channel_info *
1054 il_get_channel_info(const struct il_priv *il, enum ieee80211_band band,
1055 u16 channel)
1056 {
1057 int i;
1058
1059 switch (band) {
1060 case IEEE80211_BAND_5GHZ:
1061 for (i = 14; i < il->channel_count; i++) {
1062 if (il->channel_info[i].channel == channel)
1063 return &il->channel_info[i];
1064 }
1065 break;
1066 case IEEE80211_BAND_2GHZ:
1067 if (channel >= 1 && channel <= 14)
1068 return &il->channel_info[channel - 1];
1069 break;
1070 default:
1071 BUG();
1072 }
1073
1074 return NULL;
1075 }
1076 EXPORT_SYMBOL(il_get_channel_info);
1077
1078 /*
1079 * Setting power level allows the card to go to sleep when not busy.
1080 *
1081 * We calculate a sleep command based on the required latency, which
1082 * we get from mac80211. In order to handle thermal throttling, we can
1083 * also use pre-defined power levels.
1084 */
1085
1086 /*
1087 * This defines the old power levels. They are still used by default
1088 * (level 1) and for thermal throttle (levels 3 through 5)
1089 */
1090
1091 struct il_power_vec_entry {
1092 struct il_powertable_cmd cmd;
1093 u8 no_dtim; /* number of skip dtim */
1094 };
1095
1096 static void
1097 il_power_sleep_cam_cmd(struct il_priv *il, struct il_powertable_cmd *cmd)
1098 {
1099 memset(cmd, 0, sizeof(*cmd));
1100
1101 if (il->power_data.pci_pm)
1102 cmd->flags |= IL_POWER_PCI_PM_MSK;
1103
1104 D_POWER("Sleep command for CAM\n");
1105 }
1106
1107 static int
1108 il_set_power(struct il_priv *il, struct il_powertable_cmd *cmd)
1109 {
1110 D_POWER("Sending power/sleep command\n");
1111 D_POWER("Flags value = 0x%08X\n", cmd->flags);
1112 D_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1113 D_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1114 D_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1115 le32_to_cpu(cmd->sleep_interval[0]),
1116 le32_to_cpu(cmd->sleep_interval[1]),
1117 le32_to_cpu(cmd->sleep_interval[2]),
1118 le32_to_cpu(cmd->sleep_interval[3]),
1119 le32_to_cpu(cmd->sleep_interval[4]));
1120
1121 return il_send_cmd_pdu(il, C_POWER_TBL,
1122 sizeof(struct il_powertable_cmd), cmd);
1123 }
1124
1125 int
1126 il_power_set_mode(struct il_priv *il, struct il_powertable_cmd *cmd, bool force)
1127 {
1128 int ret;
1129 bool update_chains;
1130
1131 lockdep_assert_held(&il->mutex);
1132
1133 /* Don't update the RX chain when chain noise calibration is running */
1134 update_chains = il->chain_noise_data.state == IL_CHAIN_NOISE_DONE ||
1135 il->chain_noise_data.state == IL_CHAIN_NOISE_ALIVE;
1136
1137 if (!memcmp(&il->power_data.sleep_cmd, cmd, sizeof(*cmd)) && !force)
1138 return 0;
1139
1140 if (!il_is_ready_rf(il))
1141 return -EIO;
1142
1143 /* scan complete use sleep_power_next, need to be updated */
1144 memcpy(&il->power_data.sleep_cmd_next, cmd, sizeof(*cmd));
1145 if (test_bit(S_SCANNING, &il->status) && !force) {
1146 D_INFO("Defer power set mode while scanning\n");
1147 return 0;
1148 }
1149
1150 if (cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK)
1151 set_bit(S_POWER_PMI, &il->status);
1152
1153 ret = il_set_power(il, cmd);
1154 if (!ret) {
1155 if (!(cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK))
1156 clear_bit(S_POWER_PMI, &il->status);
1157
1158 if (il->ops->update_chain_flags && update_chains)
1159 il->ops->update_chain_flags(il);
1160 else if (il->ops->update_chain_flags)
1161 D_POWER("Cannot update the power, chain noise "
1162 "calibration running: %d\n",
1163 il->chain_noise_data.state);
1164
1165 memcpy(&il->power_data.sleep_cmd, cmd, sizeof(*cmd));
1166 } else
1167 IL_ERR("set power fail, ret = %d", ret);
1168
1169 return ret;
1170 }
1171
1172 int
1173 il_power_update_mode(struct il_priv *il, bool force)
1174 {
1175 struct il_powertable_cmd cmd;
1176
1177 il_power_sleep_cam_cmd(il, &cmd);
1178 return il_power_set_mode(il, &cmd, force);
1179 }
1180 EXPORT_SYMBOL(il_power_update_mode);
1181
1182 /* initialize to default */
1183 void
1184 il_power_initialize(struct il_priv *il)
1185 {
1186 u16 lctl = il_pcie_link_ctl(il);
1187
1188 il->power_data.pci_pm = !(lctl & PCI_CFG_LINK_CTRL_VAL_L0S_EN);
1189
1190 il->power_data.debug_sleep_level_override = -1;
1191
1192 memset(&il->power_data.sleep_cmd, 0, sizeof(il->power_data.sleep_cmd));
1193 }
1194 EXPORT_SYMBOL(il_power_initialize);
1195
1196 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
1197 * sending probe req. This should be set long enough to hear probe responses
1198 * from more than one AP. */
1199 #define IL_ACTIVE_DWELL_TIME_24 (30) /* all times in msec */
1200 #define IL_ACTIVE_DWELL_TIME_52 (20)
1201
1202 #define IL_ACTIVE_DWELL_FACTOR_24GHZ (3)
1203 #define IL_ACTIVE_DWELL_FACTOR_52GHZ (2)
1204
1205 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
1206 * Must be set longer than active dwell time.
1207 * For the most reliable scan, set > AP beacon interval (typically 100msec). */
1208 #define IL_PASSIVE_DWELL_TIME_24 (20) /* all times in msec */
1209 #define IL_PASSIVE_DWELL_TIME_52 (10)
1210 #define IL_PASSIVE_DWELL_BASE (100)
1211 #define IL_CHANNEL_TUNE_TIME 5
1212
1213 static int
1214 il_send_scan_abort(struct il_priv *il)
1215 {
1216 int ret;
1217 struct il_rx_pkt *pkt;
1218 struct il_host_cmd cmd = {
1219 .id = C_SCAN_ABORT,
1220 .flags = CMD_WANT_SKB,
1221 };
1222
1223 /* Exit instantly with error when device is not ready
1224 * to receive scan abort command or it does not perform
1225 * hardware scan currently */
1226 if (!test_bit(S_READY, &il->status) ||
1227 !test_bit(S_GEO_CONFIGURED, &il->status) ||
1228 !test_bit(S_SCAN_HW, &il->status) ||
1229 test_bit(S_FW_ERROR, &il->status) ||
1230 test_bit(S_EXIT_PENDING, &il->status))
1231 return -EIO;
1232
1233 ret = il_send_cmd_sync(il, &cmd);
1234 if (ret)
1235 return ret;
1236
1237 pkt = (struct il_rx_pkt *)cmd.reply_page;
1238 if (pkt->u.status != CAN_ABORT_STATUS) {
1239 /* The scan abort will return 1 for success or
1240 * 2 for "failure". A failure condition can be
1241 * due to simply not being in an active scan which
1242 * can occur if we send the scan abort before we
1243 * the microcode has notified us that a scan is
1244 * completed. */
1245 D_SCAN("SCAN_ABORT ret %d.\n", pkt->u.status);
1246 ret = -EIO;
1247 }
1248
1249 il_free_pages(il, cmd.reply_page);
1250 return ret;
1251 }
1252
1253 static void
1254 il_complete_scan(struct il_priv *il, bool aborted)
1255 {
1256 /* check if scan was requested from mac80211 */
1257 if (il->scan_request) {
1258 D_SCAN("Complete scan in mac80211\n");
1259 ieee80211_scan_completed(il->hw, aborted);
1260 }
1261
1262 il->scan_vif = NULL;
1263 il->scan_request = NULL;
1264 }
1265
1266 void
1267 il_force_scan_end(struct il_priv *il)
1268 {
1269 lockdep_assert_held(&il->mutex);
1270
1271 if (!test_bit(S_SCANNING, &il->status)) {
1272 D_SCAN("Forcing scan end while not scanning\n");
1273 return;
1274 }
1275
1276 D_SCAN("Forcing scan end\n");
1277 clear_bit(S_SCANNING, &il->status);
1278 clear_bit(S_SCAN_HW, &il->status);
1279 clear_bit(S_SCAN_ABORTING, &il->status);
1280 il_complete_scan(il, true);
1281 }
1282
1283 static void
1284 il_do_scan_abort(struct il_priv *il)
1285 {
1286 int ret;
1287
1288 lockdep_assert_held(&il->mutex);
1289
1290 if (!test_bit(S_SCANNING, &il->status)) {
1291 D_SCAN("Not performing scan to abort\n");
1292 return;
1293 }
1294
1295 if (test_and_set_bit(S_SCAN_ABORTING, &il->status)) {
1296 D_SCAN("Scan abort in progress\n");
1297 return;
1298 }
1299
1300 ret = il_send_scan_abort(il);
1301 if (ret) {
1302 D_SCAN("Send scan abort failed %d\n", ret);
1303 il_force_scan_end(il);
1304 } else
1305 D_SCAN("Successfully send scan abort\n");
1306 }
1307
1308 /**
1309 * il_scan_cancel - Cancel any currently executing HW scan
1310 */
1311 int
1312 il_scan_cancel(struct il_priv *il)
1313 {
1314 D_SCAN("Queuing abort scan\n");
1315 queue_work(il->workqueue, &il->abort_scan);
1316 return 0;
1317 }
1318 EXPORT_SYMBOL(il_scan_cancel);
1319
1320 /**
1321 * il_scan_cancel_timeout - Cancel any currently executing HW scan
1322 * @ms: amount of time to wait (in milliseconds) for scan to abort
1323 *
1324 */
1325 int
1326 il_scan_cancel_timeout(struct il_priv *il, unsigned long ms)
1327 {
1328 unsigned long timeout = jiffies + msecs_to_jiffies(ms);
1329
1330 lockdep_assert_held(&il->mutex);
1331
1332 D_SCAN("Scan cancel timeout\n");
1333
1334 il_do_scan_abort(il);
1335
1336 while (time_before_eq(jiffies, timeout)) {
1337 if (!test_bit(S_SCAN_HW, &il->status))
1338 break;
1339 msleep(20);
1340 }
1341
1342 return test_bit(S_SCAN_HW, &il->status);
1343 }
1344 EXPORT_SYMBOL(il_scan_cancel_timeout);
1345
1346 /* Service response to C_SCAN (0x80) */
1347 static void
1348 il_hdl_scan(struct il_priv *il, struct il_rx_buf *rxb)
1349 {
1350 #ifdef CONFIG_IWLEGACY_DEBUG
1351 struct il_rx_pkt *pkt = rxb_addr(rxb);
1352 struct il_scanreq_notification *notif =
1353 (struct il_scanreq_notification *)pkt->u.raw;
1354
1355 D_SCAN("Scan request status = 0x%x\n", notif->status);
1356 #endif
1357 }
1358
1359 /* Service N_SCAN_START (0x82) */
1360 static void
1361 il_hdl_scan_start(struct il_priv *il, struct il_rx_buf *rxb)
1362 {
1363 struct il_rx_pkt *pkt = rxb_addr(rxb);
1364 struct il_scanstart_notification *notif =
1365 (struct il_scanstart_notification *)pkt->u.raw;
1366 il->scan_start_tsf = le32_to_cpu(notif->tsf_low);
1367 D_SCAN("Scan start: " "%d [802.11%s] "
1368 "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n", notif->channel,
1369 notif->band ? "bg" : "a", le32_to_cpu(notif->tsf_high),
1370 le32_to_cpu(notif->tsf_low), notif->status, notif->beacon_timer);
1371 }
1372
1373 /* Service N_SCAN_RESULTS (0x83) */
1374 static void
1375 il_hdl_scan_results(struct il_priv *il, struct il_rx_buf *rxb)
1376 {
1377 #ifdef CONFIG_IWLEGACY_DEBUG
1378 struct il_rx_pkt *pkt = rxb_addr(rxb);
1379 struct il_scanresults_notification *notif =
1380 (struct il_scanresults_notification *)pkt->u.raw;
1381
1382 D_SCAN("Scan ch.res: " "%d [802.11%s] " "(TSF: 0x%08X:%08X) - %d "
1383 "elapsed=%lu usec\n", notif->channel, notif->band ? "bg" : "a",
1384 le32_to_cpu(notif->tsf_high), le32_to_cpu(notif->tsf_low),
1385 le32_to_cpu(notif->stats[0]),
1386 le32_to_cpu(notif->tsf_low) - il->scan_start_tsf);
1387 #endif
1388 }
1389
1390 /* Service N_SCAN_COMPLETE (0x84) */
1391 static void
1392 il_hdl_scan_complete(struct il_priv *il, struct il_rx_buf *rxb)
1393 {
1394
1395 #ifdef CONFIG_IWLEGACY_DEBUG
1396 struct il_rx_pkt *pkt = rxb_addr(rxb);
1397 struct il_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
1398 #endif
1399
1400 D_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
1401 scan_notif->scanned_channels, scan_notif->tsf_low,
1402 scan_notif->tsf_high, scan_notif->status);
1403
1404 /* The HW is no longer scanning */
1405 clear_bit(S_SCAN_HW, &il->status);
1406
1407 D_SCAN("Scan on %sGHz took %dms\n",
1408 (il->scan_band == IEEE80211_BAND_2GHZ) ? "2.4" : "5.2",
1409 jiffies_to_msecs(jiffies - il->scan_start));
1410
1411 queue_work(il->workqueue, &il->scan_completed);
1412 }
1413
1414 void
1415 il_setup_rx_scan_handlers(struct il_priv *il)
1416 {
1417 /* scan handlers */
1418 il->handlers[C_SCAN] = il_hdl_scan;
1419 il->handlers[N_SCAN_START] = il_hdl_scan_start;
1420 il->handlers[N_SCAN_RESULTS] = il_hdl_scan_results;
1421 il->handlers[N_SCAN_COMPLETE] = il_hdl_scan_complete;
1422 }
1423 EXPORT_SYMBOL(il_setup_rx_scan_handlers);
1424
1425 inline u16
1426 il_get_active_dwell_time(struct il_priv *il, enum ieee80211_band band,
1427 u8 n_probes)
1428 {
1429 if (band == IEEE80211_BAND_5GHZ)
1430 return IL_ACTIVE_DWELL_TIME_52 +
1431 IL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1);
1432 else
1433 return IL_ACTIVE_DWELL_TIME_24 +
1434 IL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1);
1435 }
1436 EXPORT_SYMBOL(il_get_active_dwell_time);
1437
1438 u16
1439 il_get_passive_dwell_time(struct il_priv *il, enum ieee80211_band band,
1440 struct ieee80211_vif *vif)
1441 {
1442 u16 value;
1443
1444 u16 passive =
1445 (band ==
1446 IEEE80211_BAND_2GHZ) ? IL_PASSIVE_DWELL_BASE +
1447 IL_PASSIVE_DWELL_TIME_24 : IL_PASSIVE_DWELL_BASE +
1448 IL_PASSIVE_DWELL_TIME_52;
1449
1450 if (il_is_any_associated(il)) {
1451 /*
1452 * If we're associated, we clamp the maximum passive
1453 * dwell time to be 98% of the smallest beacon interval
1454 * (minus 2 * channel tune time)
1455 */
1456 value = il->vif ? il->vif->bss_conf.beacon_int : 0;
1457 if (value > IL_PASSIVE_DWELL_BASE || !value)
1458 value = IL_PASSIVE_DWELL_BASE;
1459 value = (value * 98) / 100 - IL_CHANNEL_TUNE_TIME * 2;
1460 passive = min(value, passive);
1461 }
1462
1463 return passive;
1464 }
1465 EXPORT_SYMBOL(il_get_passive_dwell_time);
1466
1467 void
1468 il_init_scan_params(struct il_priv *il)
1469 {
1470 u8 ant_idx = fls(il->hw_params.valid_tx_ant) - 1;
1471 if (!il->scan_tx_ant[IEEE80211_BAND_5GHZ])
1472 il->scan_tx_ant[IEEE80211_BAND_5GHZ] = ant_idx;
1473 if (!il->scan_tx_ant[IEEE80211_BAND_2GHZ])
1474 il->scan_tx_ant[IEEE80211_BAND_2GHZ] = ant_idx;
1475 }
1476 EXPORT_SYMBOL(il_init_scan_params);
1477
1478 static int
1479 il_scan_initiate(struct il_priv *il, struct ieee80211_vif *vif)
1480 {
1481 int ret;
1482
1483 lockdep_assert_held(&il->mutex);
1484
1485 cancel_delayed_work(&il->scan_check);
1486
1487 if (!il_is_ready_rf(il)) {
1488 IL_WARN("Request scan called when driver not ready.\n");
1489 return -EIO;
1490 }
1491
1492 if (test_bit(S_SCAN_HW, &il->status)) {
1493 D_SCAN("Multiple concurrent scan requests in parallel.\n");
1494 return -EBUSY;
1495 }
1496
1497 if (test_bit(S_SCAN_ABORTING, &il->status)) {
1498 D_SCAN("Scan request while abort pending.\n");
1499 return -EBUSY;
1500 }
1501
1502 D_SCAN("Starting scan...\n");
1503
1504 set_bit(S_SCANNING, &il->status);
1505 il->scan_start = jiffies;
1506
1507 ret = il->ops->request_scan(il, vif);
1508 if (ret) {
1509 clear_bit(S_SCANNING, &il->status);
1510 return ret;
1511 }
1512
1513 queue_delayed_work(il->workqueue, &il->scan_check,
1514 IL_SCAN_CHECK_WATCHDOG);
1515
1516 return 0;
1517 }
1518
1519 int
1520 il_mac_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1521 struct cfg80211_scan_request *req)
1522 {
1523 struct il_priv *il = hw->priv;
1524 int ret;
1525
1526 if (req->n_channels == 0) {
1527 IL_ERR("Can not scan on no channels.\n");
1528 return -EINVAL;
1529 }
1530
1531 mutex_lock(&il->mutex);
1532 D_MAC80211("enter\n");
1533
1534 if (test_bit(S_SCANNING, &il->status)) {
1535 D_SCAN("Scan already in progress.\n");
1536 ret = -EAGAIN;
1537 goto out_unlock;
1538 }
1539
1540 /* mac80211 will only ask for one band at a time */
1541 il->scan_request = req;
1542 il->scan_vif = vif;
1543 il->scan_band = req->channels[0]->band;
1544
1545 ret = il_scan_initiate(il, vif);
1546
1547 out_unlock:
1548 D_MAC80211("leave ret %d\n", ret);
1549 mutex_unlock(&il->mutex);
1550
1551 return ret;
1552 }
1553 EXPORT_SYMBOL(il_mac_hw_scan);
1554
1555 static void
1556 il_bg_scan_check(struct work_struct *data)
1557 {
1558 struct il_priv *il =
1559 container_of(data, struct il_priv, scan_check.work);
1560
1561 D_SCAN("Scan check work\n");
1562
1563 /* Since we are here firmware does not finish scan and
1564 * most likely is in bad shape, so we don't bother to
1565 * send abort command, just force scan complete to mac80211 */
1566 mutex_lock(&il->mutex);
1567 il_force_scan_end(il);
1568 mutex_unlock(&il->mutex);
1569 }
1570
1571 /**
1572 * il_fill_probe_req - fill in all required fields and IE for probe request
1573 */
1574
1575 u16
1576 il_fill_probe_req(struct il_priv *il, struct ieee80211_mgmt *frame,
1577 const u8 *ta, const u8 *ies, int ie_len, int left)
1578 {
1579 int len = 0;
1580 u8 *pos = NULL;
1581
1582 /* Make sure there is enough space for the probe request,
1583 * two mandatory IEs and the data */
1584 left -= 24;
1585 if (left < 0)
1586 return 0;
1587
1588 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1589 memcpy(frame->da, il_bcast_addr, ETH_ALEN);
1590 memcpy(frame->sa, ta, ETH_ALEN);
1591 memcpy(frame->bssid, il_bcast_addr, ETH_ALEN);
1592 frame->seq_ctrl = 0;
1593
1594 len += 24;
1595
1596 /* ...next IE... */
1597 pos = &frame->u.probe_req.variable[0];
1598
1599 /* fill in our indirect SSID IE */
1600 left -= 2;
1601 if (left < 0)
1602 return 0;
1603 *pos++ = WLAN_EID_SSID;
1604 *pos++ = 0;
1605
1606 len += 2;
1607
1608 if (WARN_ON(left < ie_len))
1609 return len;
1610
1611 if (ies && ie_len) {
1612 memcpy(pos, ies, ie_len);
1613 len += ie_len;
1614 }
1615
1616 return (u16) len;
1617 }
1618 EXPORT_SYMBOL(il_fill_probe_req);
1619
1620 static void
1621 il_bg_abort_scan(struct work_struct *work)
1622 {
1623 struct il_priv *il = container_of(work, struct il_priv, abort_scan);
1624
1625 D_SCAN("Abort scan work\n");
1626
1627 /* We keep scan_check work queued in case when firmware will not
1628 * report back scan completed notification */
1629 mutex_lock(&il->mutex);
1630 il_scan_cancel_timeout(il, 200);
1631 mutex_unlock(&il->mutex);
1632 }
1633
1634 static void
1635 il_bg_scan_completed(struct work_struct *work)
1636 {
1637 struct il_priv *il = container_of(work, struct il_priv, scan_completed);
1638 bool aborted;
1639
1640 D_SCAN("Completed scan.\n");
1641
1642 cancel_delayed_work(&il->scan_check);
1643
1644 mutex_lock(&il->mutex);
1645
1646 aborted = test_and_clear_bit(S_SCAN_ABORTING, &il->status);
1647 if (aborted)
1648 D_SCAN("Aborted scan completed.\n");
1649
1650 if (!test_and_clear_bit(S_SCANNING, &il->status)) {
1651 D_SCAN("Scan already completed.\n");
1652 goto out_settings;
1653 }
1654
1655 il_complete_scan(il, aborted);
1656
1657 out_settings:
1658 /* Can we still talk to firmware ? */
1659 if (!il_is_ready_rf(il))
1660 goto out;
1661
1662 /*
1663 * We do not commit power settings while scan is pending,
1664 * do it now if the settings changed.
1665 */
1666 il_power_set_mode(il, &il->power_data.sleep_cmd_next, false);
1667 il_set_tx_power(il, il->tx_power_next, false);
1668
1669 il->ops->post_scan(il);
1670
1671 out:
1672 mutex_unlock(&il->mutex);
1673 }
1674
1675 void
1676 il_setup_scan_deferred_work(struct il_priv *il)
1677 {
1678 INIT_WORK(&il->scan_completed, il_bg_scan_completed);
1679 INIT_WORK(&il->abort_scan, il_bg_abort_scan);
1680 INIT_DELAYED_WORK(&il->scan_check, il_bg_scan_check);
1681 }
1682 EXPORT_SYMBOL(il_setup_scan_deferred_work);
1683
1684 void
1685 il_cancel_scan_deferred_work(struct il_priv *il)
1686 {
1687 cancel_work_sync(&il->abort_scan);
1688 cancel_work_sync(&il->scan_completed);
1689
1690 if (cancel_delayed_work_sync(&il->scan_check)) {
1691 mutex_lock(&il->mutex);
1692 il_force_scan_end(il);
1693 mutex_unlock(&il->mutex);
1694 }
1695 }
1696 EXPORT_SYMBOL(il_cancel_scan_deferred_work);
1697
1698 /* il->sta_lock must be held */
1699 static void
1700 il_sta_ucode_activate(struct il_priv *il, u8 sta_id)
1701 {
1702
1703 if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE))
1704 IL_ERR("ACTIVATE a non DRIVER active station id %u addr %pM\n",
1705 sta_id, il->stations[sta_id].sta.sta.addr);
1706
1707 if (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) {
1708 D_ASSOC("STA id %u addr %pM already present"
1709 " in uCode (according to driver)\n", sta_id,
1710 il->stations[sta_id].sta.sta.addr);
1711 } else {
1712 il->stations[sta_id].used |= IL_STA_UCODE_ACTIVE;
1713 D_ASSOC("Added STA id %u addr %pM to uCode\n", sta_id,
1714 il->stations[sta_id].sta.sta.addr);
1715 }
1716 }
1717
1718 static int
1719 il_process_add_sta_resp(struct il_priv *il, struct il_addsta_cmd *addsta,
1720 struct il_rx_pkt *pkt, bool sync)
1721 {
1722 u8 sta_id = addsta->sta.sta_id;
1723 unsigned long flags;
1724 int ret = -EIO;
1725
1726 if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
1727 IL_ERR("Bad return from C_ADD_STA (0x%08X)\n", pkt->hdr.flags);
1728 return ret;
1729 }
1730
1731 D_INFO("Processing response for adding station %u\n", sta_id);
1732
1733 spin_lock_irqsave(&il->sta_lock, flags);
1734
1735 switch (pkt->u.add_sta.status) {
1736 case ADD_STA_SUCCESS_MSK:
1737 D_INFO("C_ADD_STA PASSED\n");
1738 il_sta_ucode_activate(il, sta_id);
1739 ret = 0;
1740 break;
1741 case ADD_STA_NO_ROOM_IN_TBL:
1742 IL_ERR("Adding station %d failed, no room in table.\n", sta_id);
1743 break;
1744 case ADD_STA_NO_BLOCK_ACK_RESOURCE:
1745 IL_ERR("Adding station %d failed, no block ack resource.\n",
1746 sta_id);
1747 break;
1748 case ADD_STA_MODIFY_NON_EXIST_STA:
1749 IL_ERR("Attempting to modify non-existing station %d\n",
1750 sta_id);
1751 break;
1752 default:
1753 D_ASSOC("Received C_ADD_STA:(0x%08X)\n", pkt->u.add_sta.status);
1754 break;
1755 }
1756
1757 D_INFO("%s station id %u addr %pM\n",
1758 il->stations[sta_id].sta.mode ==
1759 STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", sta_id,
1760 il->stations[sta_id].sta.sta.addr);
1761
1762 /*
1763 * XXX: The MAC address in the command buffer is often changed from
1764 * the original sent to the device. That is, the MAC address
1765 * written to the command buffer often is not the same MAC address
1766 * read from the command buffer when the command returns. This
1767 * issue has not yet been resolved and this debugging is left to
1768 * observe the problem.
1769 */
1770 D_INFO("%s station according to cmd buffer %pM\n",
1771 il->stations[sta_id].sta.mode ==
1772 STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", addsta->sta.addr);
1773 spin_unlock_irqrestore(&il->sta_lock, flags);
1774
1775 return ret;
1776 }
1777
1778 static void
1779 il_add_sta_callback(struct il_priv *il, struct il_device_cmd *cmd,
1780 struct il_rx_pkt *pkt)
1781 {
1782 struct il_addsta_cmd *addsta = (struct il_addsta_cmd *)cmd->cmd.payload;
1783
1784 il_process_add_sta_resp(il, addsta, pkt, false);
1785
1786 }
1787
1788 int
1789 il_send_add_sta(struct il_priv *il, struct il_addsta_cmd *sta, u8 flags)
1790 {
1791 struct il_rx_pkt *pkt = NULL;
1792 int ret = 0;
1793 u8 data[sizeof(*sta)];
1794 struct il_host_cmd cmd = {
1795 .id = C_ADD_STA,
1796 .flags = flags,
1797 .data = data,
1798 };
1799 u8 sta_id __maybe_unused = sta->sta.sta_id;
1800
1801 D_INFO("Adding sta %u (%pM) %ssynchronously\n", sta_id, sta->sta.addr,
1802 flags & CMD_ASYNC ? "a" : "");
1803
1804 if (flags & CMD_ASYNC)
1805 cmd.callback = il_add_sta_callback;
1806 else {
1807 cmd.flags |= CMD_WANT_SKB;
1808 might_sleep();
1809 }
1810
1811 cmd.len = il->ops->build_addsta_hcmd(sta, data);
1812 ret = il_send_cmd(il, &cmd);
1813
1814 if (ret || (flags & CMD_ASYNC))
1815 return ret;
1816
1817 if (ret == 0) {
1818 pkt = (struct il_rx_pkt *)cmd.reply_page;
1819 ret = il_process_add_sta_resp(il, sta, pkt, true);
1820 }
1821 il_free_pages(il, cmd.reply_page);
1822
1823 return ret;
1824 }
1825 EXPORT_SYMBOL(il_send_add_sta);
1826
1827 static void
1828 il_set_ht_add_station(struct il_priv *il, u8 idx, struct ieee80211_sta *sta)
1829 {
1830 struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
1831 __le32 sta_flags;
1832 u8 mimo_ps_mode;
1833
1834 if (!sta || !sta_ht_inf->ht_supported)
1835 goto done;
1836
1837 mimo_ps_mode = (sta_ht_inf->cap & IEEE80211_HT_CAP_SM_PS) >> 2;
1838 D_ASSOC("spatial multiplexing power save mode: %s\n",
1839 (mimo_ps_mode == WLAN_HT_CAP_SM_PS_STATIC) ? "static" :
1840 (mimo_ps_mode == WLAN_HT_CAP_SM_PS_DYNAMIC) ? "dynamic" :
1841 "disabled");
1842
1843 sta_flags = il->stations[idx].sta.station_flags;
1844
1845 sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
1846
1847 switch (mimo_ps_mode) {
1848 case WLAN_HT_CAP_SM_PS_STATIC:
1849 sta_flags |= STA_FLG_MIMO_DIS_MSK;
1850 break;
1851 case WLAN_HT_CAP_SM_PS_DYNAMIC:
1852 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
1853 break;
1854 case WLAN_HT_CAP_SM_PS_DISABLED:
1855 break;
1856 default:
1857 IL_WARN("Invalid MIMO PS mode %d\n", mimo_ps_mode);
1858 break;
1859 }
1860
1861 sta_flags |=
1862 cpu_to_le32((u32) sta_ht_inf->
1863 ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
1864
1865 sta_flags |=
1866 cpu_to_le32((u32) sta_ht_inf->
1867 ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
1868
1869 if (il_is_ht40_tx_allowed(il, &sta->ht_cap))
1870 sta_flags |= STA_FLG_HT40_EN_MSK;
1871 else
1872 sta_flags &= ~STA_FLG_HT40_EN_MSK;
1873
1874 il->stations[idx].sta.station_flags = sta_flags;
1875 done:
1876 return;
1877 }
1878
1879 /**
1880 * il_prep_station - Prepare station information for addition
1881 *
1882 * should be called with sta_lock held
1883 */
1884 u8
1885 il_prep_station(struct il_priv *il, const u8 *addr, bool is_ap,
1886 struct ieee80211_sta *sta)
1887 {
1888 struct il_station_entry *station;
1889 int i;
1890 u8 sta_id = IL_INVALID_STATION;
1891 u16 rate;
1892
1893 if (is_ap)
1894 sta_id = IL_AP_ID;
1895 else if (is_broadcast_ether_addr(addr))
1896 sta_id = il->hw_params.bcast_id;
1897 else
1898 for (i = IL_STA_ID; i < il->hw_params.max_stations; i++) {
1899 if (ether_addr_equal(il->stations[i].sta.sta.addr,
1900 addr)) {
1901 sta_id = i;
1902 break;
1903 }
1904
1905 if (!il->stations[i].used &&
1906 sta_id == IL_INVALID_STATION)
1907 sta_id = i;
1908 }
1909
1910 /*
1911 * These two conditions have the same outcome, but keep them
1912 * separate
1913 */
1914 if (unlikely(sta_id == IL_INVALID_STATION))
1915 return sta_id;
1916
1917 /*
1918 * uCode is not able to deal with multiple requests to add a
1919 * station. Keep track if one is in progress so that we do not send
1920 * another.
1921 */
1922 if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
1923 D_INFO("STA %d already in process of being added.\n", sta_id);
1924 return sta_id;
1925 }
1926
1927 if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
1928 (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) &&
1929 ether_addr_equal(il->stations[sta_id].sta.sta.addr, addr)) {
1930 D_ASSOC("STA %d (%pM) already added, not adding again.\n",
1931 sta_id, addr);
1932 return sta_id;
1933 }
1934
1935 station = &il->stations[sta_id];
1936 station->used = IL_STA_DRIVER_ACTIVE;
1937 D_ASSOC("Add STA to driver ID %d: %pM\n", sta_id, addr);
1938 il->num_stations++;
1939
1940 /* Set up the C_ADD_STA command to send to device */
1941 memset(&station->sta, 0, sizeof(struct il_addsta_cmd));
1942 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
1943 station->sta.mode = 0;
1944 station->sta.sta.sta_id = sta_id;
1945 station->sta.station_flags = 0;
1946
1947 /*
1948 * OK to call unconditionally, since local stations (IBSS BSSID
1949 * STA and broadcast STA) pass in a NULL sta, and mac80211
1950 * doesn't allow HT IBSS.
1951 */
1952 il_set_ht_add_station(il, sta_id, sta);
1953
1954 /* 3945 only */
1955 rate = (il->band == IEEE80211_BAND_5GHZ) ? RATE_6M_PLCP : RATE_1M_PLCP;
1956 /* Turn on both antennas for the station... */
1957 station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
1958
1959 return sta_id;
1960
1961 }
1962 EXPORT_SYMBOL_GPL(il_prep_station);
1963
1964 #define STA_WAIT_TIMEOUT (HZ/2)
1965
1966 /**
1967 * il_add_station_common -
1968 */
1969 int
1970 il_add_station_common(struct il_priv *il, const u8 *addr, bool is_ap,
1971 struct ieee80211_sta *sta, u8 *sta_id_r)
1972 {
1973 unsigned long flags_spin;
1974 int ret = 0;
1975 u8 sta_id;
1976 struct il_addsta_cmd sta_cmd;
1977
1978 *sta_id_r = 0;
1979 spin_lock_irqsave(&il->sta_lock, flags_spin);
1980 sta_id = il_prep_station(il, addr, is_ap, sta);
1981 if (sta_id == IL_INVALID_STATION) {
1982 IL_ERR("Unable to prepare station %pM for addition\n", addr);
1983 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
1984 return -EINVAL;
1985 }
1986
1987 /*
1988 * uCode is not able to deal with multiple requests to add a
1989 * station. Keep track if one is in progress so that we do not send
1990 * another.
1991 */
1992 if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
1993 D_INFO("STA %d already in process of being added.\n", sta_id);
1994 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
1995 return -EEXIST;
1996 }
1997
1998 if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
1999 (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2000 D_ASSOC("STA %d (%pM) already added, not adding again.\n",
2001 sta_id, addr);
2002 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2003 return -EEXIST;
2004 }
2005
2006 il->stations[sta_id].used |= IL_STA_UCODE_INPROGRESS;
2007 memcpy(&sta_cmd, &il->stations[sta_id].sta,
2008 sizeof(struct il_addsta_cmd));
2009 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2010
2011 /* Add station to device's station table */
2012 ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2013 if (ret) {
2014 spin_lock_irqsave(&il->sta_lock, flags_spin);
2015 IL_ERR("Adding station %pM failed.\n",
2016 il->stations[sta_id].sta.sta.addr);
2017 il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2018 il->stations[sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2019 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2020 }
2021 *sta_id_r = sta_id;
2022 return ret;
2023 }
2024 EXPORT_SYMBOL(il_add_station_common);
2025
2026 /**
2027 * il_sta_ucode_deactivate - deactivate ucode status for a station
2028 *
2029 * il->sta_lock must be held
2030 */
2031 static void
2032 il_sta_ucode_deactivate(struct il_priv *il, u8 sta_id)
2033 {
2034 /* Ucode must be active and driver must be non active */
2035 if ((il->stations[sta_id].
2036 used & (IL_STA_UCODE_ACTIVE | IL_STA_DRIVER_ACTIVE)) !=
2037 IL_STA_UCODE_ACTIVE)
2038 IL_ERR("removed non active STA %u\n", sta_id);
2039
2040 il->stations[sta_id].used &= ~IL_STA_UCODE_ACTIVE;
2041
2042 memset(&il->stations[sta_id], 0, sizeof(struct il_station_entry));
2043 D_ASSOC("Removed STA %u\n", sta_id);
2044 }
2045
2046 static int
2047 il_send_remove_station(struct il_priv *il, const u8 * addr, int sta_id,
2048 bool temporary)
2049 {
2050 struct il_rx_pkt *pkt;
2051 int ret;
2052
2053 unsigned long flags_spin;
2054 struct il_rem_sta_cmd rm_sta_cmd;
2055
2056 struct il_host_cmd cmd = {
2057 .id = C_REM_STA,
2058 .len = sizeof(struct il_rem_sta_cmd),
2059 .flags = CMD_SYNC,
2060 .data = &rm_sta_cmd,
2061 };
2062
2063 memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
2064 rm_sta_cmd.num_sta = 1;
2065 memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
2066
2067 cmd.flags |= CMD_WANT_SKB;
2068
2069 ret = il_send_cmd(il, &cmd);
2070
2071 if (ret)
2072 return ret;
2073
2074 pkt = (struct il_rx_pkt *)cmd.reply_page;
2075 if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
2076 IL_ERR("Bad return from C_REM_STA (0x%08X)\n", pkt->hdr.flags);
2077 ret = -EIO;
2078 }
2079
2080 if (!ret) {
2081 switch (pkt->u.rem_sta.status) {
2082 case REM_STA_SUCCESS_MSK:
2083 if (!temporary) {
2084 spin_lock_irqsave(&il->sta_lock, flags_spin);
2085 il_sta_ucode_deactivate(il, sta_id);
2086 spin_unlock_irqrestore(&il->sta_lock,
2087 flags_spin);
2088 }
2089 D_ASSOC("C_REM_STA PASSED\n");
2090 break;
2091 default:
2092 ret = -EIO;
2093 IL_ERR("C_REM_STA failed\n");
2094 break;
2095 }
2096 }
2097 il_free_pages(il, cmd.reply_page);
2098
2099 return ret;
2100 }
2101
2102 /**
2103 * il_remove_station - Remove driver's knowledge of station.
2104 */
2105 int
2106 il_remove_station(struct il_priv *il, const u8 sta_id, const u8 * addr)
2107 {
2108 unsigned long flags;
2109
2110 if (!il_is_ready(il)) {
2111 D_INFO("Unable to remove station %pM, device not ready.\n",
2112 addr);
2113 /*
2114 * It is typical for stations to be removed when we are
2115 * going down. Return success since device will be down
2116 * soon anyway
2117 */
2118 return 0;
2119 }
2120
2121 D_ASSOC("Removing STA from driver:%d %pM\n", sta_id, addr);
2122
2123 if (WARN_ON(sta_id == IL_INVALID_STATION))
2124 return -EINVAL;
2125
2126 spin_lock_irqsave(&il->sta_lock, flags);
2127
2128 if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2129 D_INFO("Removing %pM but non DRIVER active\n", addr);
2130 goto out_err;
2131 }
2132
2133 if (!(il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2134 D_INFO("Removing %pM but non UCODE active\n", addr);
2135 goto out_err;
2136 }
2137
2138 if (il->stations[sta_id].used & IL_STA_LOCAL) {
2139 kfree(il->stations[sta_id].lq);
2140 il->stations[sta_id].lq = NULL;
2141 }
2142
2143 il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2144
2145 il->num_stations--;
2146
2147 BUG_ON(il->num_stations < 0);
2148
2149 spin_unlock_irqrestore(&il->sta_lock, flags);
2150
2151 return il_send_remove_station(il, addr, sta_id, false);
2152 out_err:
2153 spin_unlock_irqrestore(&il->sta_lock, flags);
2154 return -EINVAL;
2155 }
2156 EXPORT_SYMBOL_GPL(il_remove_station);
2157
2158 /**
2159 * il_clear_ucode_stations - clear ucode station table bits
2160 *
2161 * This function clears all the bits in the driver indicating
2162 * which stations are active in the ucode. Call when something
2163 * other than explicit station management would cause this in
2164 * the ucode, e.g. unassociated RXON.
2165 */
2166 void
2167 il_clear_ucode_stations(struct il_priv *il)
2168 {
2169 int i;
2170 unsigned long flags_spin;
2171 bool cleared = false;
2172
2173 D_INFO("Clearing ucode stations in driver\n");
2174
2175 spin_lock_irqsave(&il->sta_lock, flags_spin);
2176 for (i = 0; i < il->hw_params.max_stations; i++) {
2177 if (il->stations[i].used & IL_STA_UCODE_ACTIVE) {
2178 D_INFO("Clearing ucode active for station %d\n", i);
2179 il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2180 cleared = true;
2181 }
2182 }
2183 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2184
2185 if (!cleared)
2186 D_INFO("No active stations found to be cleared\n");
2187 }
2188 EXPORT_SYMBOL(il_clear_ucode_stations);
2189
2190 /**
2191 * il_restore_stations() - Restore driver known stations to device
2192 *
2193 * All stations considered active by driver, but not present in ucode, is
2194 * restored.
2195 *
2196 * Function sleeps.
2197 */
2198 void
2199 il_restore_stations(struct il_priv *il)
2200 {
2201 struct il_addsta_cmd sta_cmd;
2202 struct il_link_quality_cmd lq;
2203 unsigned long flags_spin;
2204 int i;
2205 bool found = false;
2206 int ret;
2207 bool send_lq;
2208
2209 if (!il_is_ready(il)) {
2210 D_INFO("Not ready yet, not restoring any stations.\n");
2211 return;
2212 }
2213
2214 D_ASSOC("Restoring all known stations ... start.\n");
2215 spin_lock_irqsave(&il->sta_lock, flags_spin);
2216 for (i = 0; i < il->hw_params.max_stations; i++) {
2217 if ((il->stations[i].used & IL_STA_DRIVER_ACTIVE) &&
2218 !(il->stations[i].used & IL_STA_UCODE_ACTIVE)) {
2219 D_ASSOC("Restoring sta %pM\n",
2220 il->stations[i].sta.sta.addr);
2221 il->stations[i].sta.mode = 0;
2222 il->stations[i].used |= IL_STA_UCODE_INPROGRESS;
2223 found = true;
2224 }
2225 }
2226
2227 for (i = 0; i < il->hw_params.max_stations; i++) {
2228 if ((il->stations[i].used & IL_STA_UCODE_INPROGRESS)) {
2229 memcpy(&sta_cmd, &il->stations[i].sta,
2230 sizeof(struct il_addsta_cmd));
2231 send_lq = false;
2232 if (il->stations[i].lq) {
2233 memcpy(&lq, il->stations[i].lq,
2234 sizeof(struct il_link_quality_cmd));
2235 send_lq = true;
2236 }
2237 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2238 ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2239 if (ret) {
2240 spin_lock_irqsave(&il->sta_lock, flags_spin);
2241 IL_ERR("Adding station %pM failed.\n",
2242 il->stations[i].sta.sta.addr);
2243 il->stations[i].used &= ~IL_STA_DRIVER_ACTIVE;
2244 il->stations[i].used &=
2245 ~IL_STA_UCODE_INPROGRESS;
2246 spin_unlock_irqrestore(&il->sta_lock,
2247 flags_spin);
2248 }
2249 /*
2250 * Rate scaling has already been initialized, send
2251 * current LQ command
2252 */
2253 if (send_lq)
2254 il_send_lq_cmd(il, &lq, CMD_SYNC, true);
2255 spin_lock_irqsave(&il->sta_lock, flags_spin);
2256 il->stations[i].used &= ~IL_STA_UCODE_INPROGRESS;
2257 }
2258 }
2259
2260 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2261 if (!found)
2262 D_INFO("Restoring all known stations"
2263 " .... no stations to be restored.\n");
2264 else
2265 D_INFO("Restoring all known stations" " .... complete.\n");
2266 }
2267 EXPORT_SYMBOL(il_restore_stations);
2268
2269 int
2270 il_get_free_ucode_key_idx(struct il_priv *il)
2271 {
2272 int i;
2273
2274 for (i = 0; i < il->sta_key_max_num; i++)
2275 if (!test_and_set_bit(i, &il->ucode_key_table))
2276 return i;
2277
2278 return WEP_INVALID_OFFSET;
2279 }
2280 EXPORT_SYMBOL(il_get_free_ucode_key_idx);
2281
2282 void
2283 il_dealloc_bcast_stations(struct il_priv *il)
2284 {
2285 unsigned long flags;
2286 int i;
2287
2288 spin_lock_irqsave(&il->sta_lock, flags);
2289 for (i = 0; i < il->hw_params.max_stations; i++) {
2290 if (!(il->stations[i].used & IL_STA_BCAST))
2291 continue;
2292
2293 il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2294 il->num_stations--;
2295 BUG_ON(il->num_stations < 0);
2296 kfree(il->stations[i].lq);
2297 il->stations[i].lq = NULL;
2298 }
2299 spin_unlock_irqrestore(&il->sta_lock, flags);
2300 }
2301 EXPORT_SYMBOL_GPL(il_dealloc_bcast_stations);
2302
2303 #ifdef CONFIG_IWLEGACY_DEBUG
2304 static void
2305 il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq)
2306 {
2307 int i;
2308 D_RATE("lq station id 0x%x\n", lq->sta_id);
2309 D_RATE("lq ant 0x%X 0x%X\n", lq->general_params.single_stream_ant_msk,
2310 lq->general_params.dual_stream_ant_msk);
2311
2312 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
2313 D_RATE("lq idx %d 0x%X\n", i, lq->rs_table[i].rate_n_flags);
2314 }
2315 #else
2316 static inline void
2317 il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq)
2318 {
2319 }
2320 #endif
2321
2322 /**
2323 * il_is_lq_table_valid() - Test one aspect of LQ cmd for validity
2324 *
2325 * It sometimes happens when a HT rate has been in use and we
2326 * loose connectivity with AP then mac80211 will first tell us that the
2327 * current channel is not HT anymore before removing the station. In such a
2328 * scenario the RXON flags will be updated to indicate we are not
2329 * communicating HT anymore, but the LQ command may still contain HT rates.
2330 * Test for this to prevent driver from sending LQ command between the time
2331 * RXON flags are updated and when LQ command is updated.
2332 */
2333 static bool
2334 il_is_lq_table_valid(struct il_priv *il, struct il_link_quality_cmd *lq)
2335 {
2336 int i;
2337
2338 if (il->ht.enabled)
2339 return true;
2340
2341 D_INFO("Channel %u is not an HT channel\n", il->active.channel);
2342 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
2343 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & RATE_MCS_HT_MSK) {
2344 D_INFO("idx %d of LQ expects HT channel\n", i);
2345 return false;
2346 }
2347 }
2348 return true;
2349 }
2350
2351 /**
2352 * il_send_lq_cmd() - Send link quality command
2353 * @init: This command is sent as part of station initialization right
2354 * after station has been added.
2355 *
2356 * The link quality command is sent as the last step of station creation.
2357 * This is the special case in which init is set and we call a callback in
2358 * this case to clear the state indicating that station creation is in
2359 * progress.
2360 */
2361 int
2362 il_send_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq,
2363 u8 flags, bool init)
2364 {
2365 int ret = 0;
2366 unsigned long flags_spin;
2367
2368 struct il_host_cmd cmd = {
2369 .id = C_TX_LINK_QUALITY_CMD,
2370 .len = sizeof(struct il_link_quality_cmd),
2371 .flags = flags,
2372 .data = lq,
2373 };
2374
2375 if (WARN_ON(lq->sta_id == IL_INVALID_STATION))
2376 return -EINVAL;
2377
2378 spin_lock_irqsave(&il->sta_lock, flags_spin);
2379 if (!(il->stations[lq->sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2380 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2381 return -EINVAL;
2382 }
2383 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2384
2385 il_dump_lq_cmd(il, lq);
2386 BUG_ON(init && (cmd.flags & CMD_ASYNC));
2387
2388 if (il_is_lq_table_valid(il, lq))
2389 ret = il_send_cmd(il, &cmd);
2390 else
2391 ret = -EINVAL;
2392
2393 if (cmd.flags & CMD_ASYNC)
2394 return ret;
2395
2396 if (init) {
2397 D_INFO("init LQ command complete,"
2398 " clearing sta addition status for sta %d\n",
2399 lq->sta_id);
2400 spin_lock_irqsave(&il->sta_lock, flags_spin);
2401 il->stations[lq->sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2402 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2403 }
2404 return ret;
2405 }
2406 EXPORT_SYMBOL(il_send_lq_cmd);
2407
2408 int
2409 il_mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2410 struct ieee80211_sta *sta)
2411 {
2412 struct il_priv *il = hw->priv;
2413 struct il_station_priv_common *sta_common = (void *)sta->drv_priv;
2414 int ret;
2415
2416 mutex_lock(&il->mutex);
2417 D_MAC80211("enter station %pM\n", sta->addr);
2418
2419 ret = il_remove_station(il, sta_common->sta_id, sta->addr);
2420 if (ret)
2421 IL_ERR("Error removing station %pM\n", sta->addr);
2422
2423 D_MAC80211("leave ret %d\n", ret);
2424 mutex_unlock(&il->mutex);
2425
2426 return ret;
2427 }
2428 EXPORT_SYMBOL(il_mac_sta_remove);
2429
2430 /************************** RX-FUNCTIONS ****************************/
2431 /*
2432 * Rx theory of operation
2433 *
2434 * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
2435 * each of which point to Receive Buffers to be filled by the NIC. These get
2436 * used not only for Rx frames, but for any command response or notification
2437 * from the NIC. The driver and NIC manage the Rx buffers by means
2438 * of idxes into the circular buffer.
2439 *
2440 * Rx Queue Indexes
2441 * The host/firmware share two idx registers for managing the Rx buffers.
2442 *
2443 * The READ idx maps to the first position that the firmware may be writing
2444 * to -- the driver can read up to (but not including) this position and get
2445 * good data.
2446 * The READ idx is managed by the firmware once the card is enabled.
2447 *
2448 * The WRITE idx maps to the last position the driver has read from -- the
2449 * position preceding WRITE is the last slot the firmware can place a packet.
2450 *
2451 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
2452 * WRITE = READ.
2453 *
2454 * During initialization, the host sets up the READ queue position to the first
2455 * IDX position, and WRITE to the last (READ - 1 wrapped)
2456 *
2457 * When the firmware places a packet in a buffer, it will advance the READ idx
2458 * and fire the RX interrupt. The driver can then query the READ idx and
2459 * process as many packets as possible, moving the WRITE idx forward as it
2460 * resets the Rx queue buffers with new memory.
2461 *
2462 * The management in the driver is as follows:
2463 * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When
2464 * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
2465 * to replenish the iwl->rxq->rx_free.
2466 * + In il_rx_replenish (scheduled) if 'processed' != 'read' then the
2467 * iwl->rxq is replenished and the READ IDX is updated (updating the
2468 * 'processed' and 'read' driver idxes as well)
2469 * + A received packet is processed and handed to the kernel network stack,
2470 * detached from the iwl->rxq. The driver 'processed' idx is updated.
2471 * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
2472 * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
2473 * IDX is not incremented and iwl->status(RX_STALLED) is set. If there
2474 * were enough free buffers and RX_STALLED is set it is cleared.
2475 *
2476 *
2477 * Driver sequence:
2478 *
2479 * il_rx_queue_alloc() Allocates rx_free
2480 * il_rx_replenish() Replenishes rx_free list from rx_used, and calls
2481 * il_rx_queue_restock
2482 * il_rx_queue_restock() Moves available buffers from rx_free into Rx
2483 * queue, updates firmware pointers, and updates
2484 * the WRITE idx. If insufficient rx_free buffers
2485 * are available, schedules il_rx_replenish
2486 *
2487 * -- enable interrupts --
2488 * ISR - il_rx() Detach il_rx_bufs from pool up to the
2489 * READ IDX, detaching the SKB from the pool.
2490 * Moves the packet buffer from queue to rx_used.
2491 * Calls il_rx_queue_restock to refill any empty
2492 * slots.
2493 * ...
2494 *
2495 */
2496
2497 /**
2498 * il_rx_queue_space - Return number of free slots available in queue.
2499 */
2500 int
2501 il_rx_queue_space(const struct il_rx_queue *q)
2502 {
2503 int s = q->read - q->write;
2504 if (s <= 0)
2505 s += RX_QUEUE_SIZE;
2506 /* keep some buffer to not confuse full and empty queue */
2507 s -= 2;
2508 if (s < 0)
2509 s = 0;
2510 return s;
2511 }
2512 EXPORT_SYMBOL(il_rx_queue_space);
2513
2514 /**
2515 * il_rx_queue_update_write_ptr - Update the write pointer for the RX queue
2516 */
2517 void
2518 il_rx_queue_update_write_ptr(struct il_priv *il, struct il_rx_queue *q)
2519 {
2520 unsigned long flags;
2521 u32 rx_wrt_ptr_reg = il->hw_params.rx_wrt_ptr_reg;
2522 u32 reg;
2523
2524 spin_lock_irqsave(&q->lock, flags);
2525
2526 if (q->need_update == 0)
2527 goto exit_unlock;
2528
2529 /* If power-saving is in use, make sure device is awake */
2530 if (test_bit(S_POWER_PMI, &il->status)) {
2531 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2532
2533 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2534 D_INFO("Rx queue requesting wakeup," " GP1 = 0x%x\n",
2535 reg);
2536 il_set_bit(il, CSR_GP_CNTRL,
2537 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2538 goto exit_unlock;
2539 }
2540
2541 q->write_actual = (q->write & ~0x7);
2542 il_wr(il, rx_wrt_ptr_reg, q->write_actual);
2543
2544 /* Else device is assumed to be awake */
2545 } else {
2546 /* Device expects a multiple of 8 */
2547 q->write_actual = (q->write & ~0x7);
2548 il_wr(il, rx_wrt_ptr_reg, q->write_actual);
2549 }
2550
2551 q->need_update = 0;
2552
2553 exit_unlock:
2554 spin_unlock_irqrestore(&q->lock, flags);
2555 }
2556 EXPORT_SYMBOL(il_rx_queue_update_write_ptr);
2557
2558 int
2559 il_rx_queue_alloc(struct il_priv *il)
2560 {
2561 struct il_rx_queue *rxq = &il->rxq;
2562 struct device *dev = &il->pci_dev->dev;
2563 int i;
2564
2565 spin_lock_init(&rxq->lock);
2566 INIT_LIST_HEAD(&rxq->rx_free);
2567 INIT_LIST_HEAD(&rxq->rx_used);
2568
2569 /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
2570 rxq->bd =
2571 dma_alloc_coherent(dev, 4 * RX_QUEUE_SIZE, &rxq->bd_dma,
2572 GFP_KERNEL);
2573 if (!rxq->bd)
2574 goto err_bd;
2575
2576 rxq->rb_stts =
2577 dma_alloc_coherent(dev, sizeof(struct il_rb_status),
2578 &rxq->rb_stts_dma, GFP_KERNEL);
2579 if (!rxq->rb_stts)
2580 goto err_rb;
2581
2582 /* Fill the rx_used queue with _all_ of the Rx buffers */
2583 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
2584 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
2585
2586 /* Set us so that we have processed and used all buffers, but have
2587 * not restocked the Rx queue with fresh buffers */
2588 rxq->read = rxq->write = 0;
2589 rxq->write_actual = 0;
2590 rxq->free_count = 0;
2591 rxq->need_update = 0;
2592 return 0;
2593
2594 err_rb:
2595 dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
2596 rxq->bd_dma);
2597 err_bd:
2598 return -ENOMEM;
2599 }
2600 EXPORT_SYMBOL(il_rx_queue_alloc);
2601
2602 void
2603 il_hdl_spectrum_measurement(struct il_priv *il, struct il_rx_buf *rxb)
2604 {
2605 struct il_rx_pkt *pkt = rxb_addr(rxb);
2606 struct il_spectrum_notification *report = &(pkt->u.spectrum_notif);
2607
2608 if (!report->state) {
2609 D_11H("Spectrum Measure Notification: Start\n");
2610 return;
2611 }
2612
2613 memcpy(&il->measure_report, report, sizeof(*report));
2614 il->measurement_status |= MEASUREMENT_READY;
2615 }
2616 EXPORT_SYMBOL(il_hdl_spectrum_measurement);
2617
2618 /*
2619 * returns non-zero if packet should be dropped
2620 */
2621 int
2622 il_set_decrypted_flag(struct il_priv *il, struct ieee80211_hdr *hdr,
2623 u32 decrypt_res, struct ieee80211_rx_status *stats)
2624 {
2625 u16 fc = le16_to_cpu(hdr->frame_control);
2626
2627 /*
2628 * All contexts have the same setting here due to it being
2629 * a module parameter, so OK to check any context.
2630 */
2631 if (il->active.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2632 return 0;
2633
2634 if (!(fc & IEEE80211_FCTL_PROTECTED))
2635 return 0;
2636
2637 D_RX("decrypt_res:0x%x\n", decrypt_res);
2638 switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2639 case RX_RES_STATUS_SEC_TYPE_TKIP:
2640 /* The uCode has got a bad phase 1 Key, pushes the packet.
2641 * Decryption will be done in SW. */
2642 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2643 RX_RES_STATUS_BAD_KEY_TTAK)
2644 break;
2645
2646 case RX_RES_STATUS_SEC_TYPE_WEP:
2647 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2648 RX_RES_STATUS_BAD_ICV_MIC) {
2649 /* bad ICV, the packet is destroyed since the
2650 * decryption is inplace, drop it */
2651 D_RX("Packet destroyed\n");
2652 return -1;
2653 }
2654 case RX_RES_STATUS_SEC_TYPE_CCMP:
2655 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2656 RX_RES_STATUS_DECRYPT_OK) {
2657 D_RX("hw decrypt successfully!!!\n");
2658 stats->flag |= RX_FLAG_DECRYPTED;
2659 }
2660 break;
2661
2662 default:
2663 break;
2664 }
2665 return 0;
2666 }
2667 EXPORT_SYMBOL(il_set_decrypted_flag);
2668
2669 /**
2670 * il_txq_update_write_ptr - Send new write idx to hardware
2671 */
2672 void
2673 il_txq_update_write_ptr(struct il_priv *il, struct il_tx_queue *txq)
2674 {
2675 u32 reg = 0;
2676 int txq_id = txq->q.id;
2677
2678 if (txq->need_update == 0)
2679 return;
2680
2681 /* if we're trying to save power */
2682 if (test_bit(S_POWER_PMI, &il->status)) {
2683 /* wake up nic if it's powered down ...
2684 * uCode will wake up, and interrupt us again, so next
2685 * time we'll skip this part. */
2686 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2687
2688 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2689 D_INFO("Tx queue %d requesting wakeup," " GP1 = 0x%x\n",
2690 txq_id, reg);
2691 il_set_bit(il, CSR_GP_CNTRL,
2692 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2693 return;
2694 }
2695
2696 il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8));
2697
2698 /*
2699 * else not in power-save mode,
2700 * uCode will never sleep when we're
2701 * trying to tx (during RFKILL, we're not trying to tx).
2702 */
2703 } else
2704 _il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8));
2705 txq->need_update = 0;
2706 }
2707 EXPORT_SYMBOL(il_txq_update_write_ptr);
2708
2709 /**
2710 * il_tx_queue_unmap - Unmap any remaining DMA mappings and free skb's
2711 */
2712 void
2713 il_tx_queue_unmap(struct il_priv *il, int txq_id)
2714 {
2715 struct il_tx_queue *txq = &il->txq[txq_id];
2716 struct il_queue *q = &txq->q;
2717
2718 if (q->n_bd == 0)
2719 return;
2720
2721 while (q->write_ptr != q->read_ptr) {
2722 il->ops->txq_free_tfd(il, txq);
2723 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2724 }
2725 }
2726 EXPORT_SYMBOL(il_tx_queue_unmap);
2727
2728 /**
2729 * il_tx_queue_free - Deallocate DMA queue.
2730 * @txq: Transmit queue to deallocate.
2731 *
2732 * Empty queue by removing and destroying all BD's.
2733 * Free all buffers.
2734 * 0-fill, but do not free "txq" descriptor structure.
2735 */
2736 void
2737 il_tx_queue_free(struct il_priv *il, int txq_id)
2738 {
2739 struct il_tx_queue *txq = &il->txq[txq_id];
2740 struct device *dev = &il->pci_dev->dev;
2741 int i;
2742
2743 il_tx_queue_unmap(il, txq_id);
2744
2745 /* De-alloc array of command/tx buffers */
2746 for (i = 0; i < TFD_TX_CMD_SLOTS; i++)
2747 kfree(txq->cmd[i]);
2748
2749 /* De-alloc circular buffer of TFDs */
2750 if (txq->q.n_bd)
2751 dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2752 txq->tfds, txq->q.dma_addr);
2753
2754 /* De-alloc array of per-TFD driver data */
2755 kfree(txq->skbs);
2756 txq->skbs = NULL;
2757
2758 /* deallocate arrays */
2759 kfree(txq->cmd);
2760 kfree(txq->meta);
2761 txq->cmd = NULL;
2762 txq->meta = NULL;
2763
2764 /* 0-fill queue descriptor structure */
2765 memset(txq, 0, sizeof(*txq));
2766 }
2767 EXPORT_SYMBOL(il_tx_queue_free);
2768
2769 /**
2770 * il_cmd_queue_unmap - Unmap any remaining DMA mappings from command queue
2771 */
2772 void
2773 il_cmd_queue_unmap(struct il_priv *il)
2774 {
2775 struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2776 struct il_queue *q = &txq->q;
2777 int i;
2778
2779 if (q->n_bd == 0)
2780 return;
2781
2782 while (q->read_ptr != q->write_ptr) {
2783 i = il_get_cmd_idx(q, q->read_ptr, 0);
2784
2785 if (txq->meta[i].flags & CMD_MAPPED) {
2786 pci_unmap_single(il->pci_dev,
2787 dma_unmap_addr(&txq->meta[i], mapping),
2788 dma_unmap_len(&txq->meta[i], len),
2789 PCI_DMA_BIDIRECTIONAL);
2790 txq->meta[i].flags = 0;
2791 }
2792
2793 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2794 }
2795
2796 i = q->n_win;
2797 if (txq->meta[i].flags & CMD_MAPPED) {
2798 pci_unmap_single(il->pci_dev,
2799 dma_unmap_addr(&txq->meta[i], mapping),
2800 dma_unmap_len(&txq->meta[i], len),
2801 PCI_DMA_BIDIRECTIONAL);
2802 txq->meta[i].flags = 0;
2803 }
2804 }
2805 EXPORT_SYMBOL(il_cmd_queue_unmap);
2806
2807 /**
2808 * il_cmd_queue_free - Deallocate DMA queue.
2809 * @txq: Transmit queue to deallocate.
2810 *
2811 * Empty queue by removing and destroying all BD's.
2812 * Free all buffers.
2813 * 0-fill, but do not free "txq" descriptor structure.
2814 */
2815 void
2816 il_cmd_queue_free(struct il_priv *il)
2817 {
2818 struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2819 struct device *dev = &il->pci_dev->dev;
2820 int i;
2821
2822 il_cmd_queue_unmap(il);
2823
2824 /* De-alloc array of command/tx buffers */
2825 for (i = 0; i <= TFD_CMD_SLOTS; i++)
2826 kfree(txq->cmd[i]);
2827
2828 /* De-alloc circular buffer of TFDs */
2829 if (txq->q.n_bd)
2830 dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2831 txq->tfds, txq->q.dma_addr);
2832
2833 /* deallocate arrays */
2834 kfree(txq->cmd);
2835 kfree(txq->meta);
2836 txq->cmd = NULL;
2837 txq->meta = NULL;
2838
2839 /* 0-fill queue descriptor structure */
2840 memset(txq, 0, sizeof(*txq));
2841 }
2842 EXPORT_SYMBOL(il_cmd_queue_free);
2843
2844 /*************** DMA-QUEUE-GENERAL-FUNCTIONS *****
2845 * DMA services
2846 *
2847 * Theory of operation
2848 *
2849 * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
2850 * of buffer descriptors, each of which points to one or more data buffers for
2851 * the device to read from or fill. Driver and device exchange status of each
2852 * queue via "read" and "write" pointers. Driver keeps minimum of 2 empty
2853 * entries in each circular buffer, to protect against confusing empty and full
2854 * queue states.
2855 *
2856 * The device reads or writes the data in the queues via the device's several
2857 * DMA/FIFO channels. Each queue is mapped to a single DMA channel.
2858 *
2859 * For Tx queue, there are low mark and high mark limits. If, after queuing
2860 * the packet for Tx, free space become < low mark, Tx queue stopped. When
2861 * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
2862 * Tx queue resumed.
2863 *
2864 * See more detailed info in 4965.h.
2865 ***************************************************/
2866
2867 int
2868 il_queue_space(const struct il_queue *q)
2869 {
2870 int s = q->read_ptr - q->write_ptr;
2871
2872 if (q->read_ptr > q->write_ptr)
2873 s -= q->n_bd;
2874
2875 if (s <= 0)
2876 s += q->n_win;
2877 /* keep some reserve to not confuse empty and full situations */
2878 s -= 2;
2879 if (s < 0)
2880 s = 0;
2881 return s;
2882 }
2883 EXPORT_SYMBOL(il_queue_space);
2884
2885
2886 /**
2887 * il_queue_init - Initialize queue's high/low-water and read/write idxes
2888 */
2889 static int
2890 il_queue_init(struct il_priv *il, struct il_queue *q, int slots, u32 id)
2891 {
2892 /*
2893 * TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
2894 * il_queue_inc_wrap and il_queue_dec_wrap are broken.
2895 */
2896 BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
2897 /* FIXME: remove q->n_bd */
2898 q->n_bd = TFD_QUEUE_SIZE_MAX;
2899
2900 q->n_win = slots;
2901 q->id = id;
2902
2903 /* slots_must be power-of-two size, otherwise
2904 * il_get_cmd_idx is broken. */
2905 BUG_ON(!is_power_of_2(slots));
2906
2907 q->low_mark = q->n_win / 4;
2908 if (q->low_mark < 4)
2909 q->low_mark = 4;
2910
2911 q->high_mark = q->n_win / 8;
2912 if (q->high_mark < 2)
2913 q->high_mark = 2;
2914
2915 q->write_ptr = q->read_ptr = 0;
2916
2917 return 0;
2918 }
2919
2920 /**
2921 * il_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
2922 */
2923 static int
2924 il_tx_queue_alloc(struct il_priv *il, struct il_tx_queue *txq, u32 id)
2925 {
2926 struct device *dev = &il->pci_dev->dev;
2927 size_t tfd_sz = il->hw_params.tfd_size * TFD_QUEUE_SIZE_MAX;
2928
2929 /* Driver ilate data, only for Tx (not command) queues,
2930 * not shared with device. */
2931 if (id != il->cmd_queue) {
2932 txq->skbs = kcalloc(TFD_QUEUE_SIZE_MAX, sizeof(struct skb *),
2933 GFP_KERNEL);
2934 if (!txq->skbs) {
2935 IL_ERR("Fail to alloc skbs\n");
2936 goto error;
2937 }
2938 } else
2939 txq->skbs = NULL;
2940
2941 /* Circular buffer of transmit frame descriptors (TFDs),
2942 * shared with device */
2943 txq->tfds =
2944 dma_alloc_coherent(dev, tfd_sz, &txq->q.dma_addr, GFP_KERNEL);
2945 if (!txq->tfds) {
2946 IL_ERR("Fail to alloc TFDs\n");
2947 goto error;
2948 }
2949 txq->q.id = id;
2950
2951 return 0;
2952
2953 error:
2954 kfree(txq->skbs);
2955 txq->skbs = NULL;
2956
2957 return -ENOMEM;
2958 }
2959
2960 /**
2961 * il_tx_queue_init - Allocate and initialize one tx/cmd queue
2962 */
2963 int
2964 il_tx_queue_init(struct il_priv *il, u32 txq_id)
2965 {
2966 int i, len, ret;
2967 int slots, actual_slots;
2968 struct il_tx_queue *txq = &il->txq[txq_id];
2969
2970 /*
2971 * Alloc buffer array for commands (Tx or other types of commands).
2972 * For the command queue (#4/#9), allocate command space + one big
2973 * command for scan, since scan command is very huge; the system will
2974 * not have two scans at the same time, so only one is needed.
2975 * For normal Tx queues (all other queues), no super-size command
2976 * space is needed.
2977 */
2978 if (txq_id == il->cmd_queue) {
2979 slots = TFD_CMD_SLOTS;
2980 actual_slots = slots + 1;
2981 } else {
2982 slots = TFD_TX_CMD_SLOTS;
2983 actual_slots = slots;
2984 }
2985
2986 txq->meta =
2987 kzalloc(sizeof(struct il_cmd_meta) * actual_slots, GFP_KERNEL);
2988 txq->cmd =
2989 kzalloc(sizeof(struct il_device_cmd *) * actual_slots, GFP_KERNEL);
2990
2991 if (!txq->meta || !txq->cmd)
2992 goto out_free_arrays;
2993
2994 len = sizeof(struct il_device_cmd);
2995 for (i = 0; i < actual_slots; i++) {
2996 /* only happens for cmd queue */
2997 if (i == slots)
2998 len = IL_MAX_CMD_SIZE;
2999
3000 txq->cmd[i] = kmalloc(len, GFP_KERNEL);
3001 if (!txq->cmd[i])
3002 goto err;
3003 }
3004
3005 /* Alloc driver data array and TFD circular buffer */
3006 ret = il_tx_queue_alloc(il, txq, txq_id);
3007 if (ret)
3008 goto err;
3009
3010 txq->need_update = 0;
3011
3012 /*
3013 * For the default queues 0-3, set up the swq_id
3014 * already -- all others need to get one later
3015 * (if they need one at all).
3016 */
3017 if (txq_id < 4)
3018 il_set_swq_id(txq, txq_id, txq_id);
3019
3020 /* Initialize queue's high/low-water marks, and head/tail idxes */
3021 il_queue_init(il, &txq->q, slots, txq_id);
3022
3023 /* Tell device where to find queue */
3024 il->ops->txq_init(il, txq);
3025
3026 return 0;
3027 err:
3028 for (i = 0; i < actual_slots; i++)
3029 kfree(txq->cmd[i]);
3030 out_free_arrays:
3031 kfree(txq->meta);
3032 kfree(txq->cmd);
3033
3034 return -ENOMEM;
3035 }
3036 EXPORT_SYMBOL(il_tx_queue_init);
3037
3038 void
3039 il_tx_queue_reset(struct il_priv *il, u32 txq_id)
3040 {
3041 int slots, actual_slots;
3042 struct il_tx_queue *txq = &il->txq[txq_id];
3043
3044 if (txq_id == il->cmd_queue) {
3045 slots = TFD_CMD_SLOTS;
3046 actual_slots = TFD_CMD_SLOTS + 1;
3047 } else {
3048 slots = TFD_TX_CMD_SLOTS;
3049 actual_slots = TFD_TX_CMD_SLOTS;
3050 }
3051
3052 memset(txq->meta, 0, sizeof(struct il_cmd_meta) * actual_slots);
3053 txq->need_update = 0;
3054
3055 /* Initialize queue's high/low-water marks, and head/tail idxes */
3056 il_queue_init(il, &txq->q, slots, txq_id);
3057
3058 /* Tell device where to find queue */
3059 il->ops->txq_init(il, txq);
3060 }
3061 EXPORT_SYMBOL(il_tx_queue_reset);
3062
3063 /*************** HOST COMMAND QUEUE FUNCTIONS *****/
3064
3065 /**
3066 * il_enqueue_hcmd - enqueue a uCode command
3067 * @il: device ilate data point
3068 * @cmd: a point to the ucode command structure
3069 *
3070 * The function returns < 0 values to indicate the operation is
3071 * failed. On success, it turns the idx (> 0) of command in the
3072 * command queue.
3073 */
3074 int
3075 il_enqueue_hcmd(struct il_priv *il, struct il_host_cmd *cmd)
3076 {
3077 struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3078 struct il_queue *q = &txq->q;
3079 struct il_device_cmd *out_cmd;
3080 struct il_cmd_meta *out_meta;
3081 dma_addr_t phys_addr;
3082 unsigned long flags;
3083 int len;
3084 u32 idx;
3085 u16 fix_size;
3086
3087 cmd->len = il->ops->get_hcmd_size(cmd->id, cmd->len);
3088 fix_size = (u16) (cmd->len + sizeof(out_cmd->hdr));
3089
3090 /* If any of the command structures end up being larger than
3091 * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
3092 * we will need to increase the size of the TFD entries
3093 * Also, check to see if command buffer should not exceed the size
3094 * of device_cmd and max_cmd_size. */
3095 BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
3096 !(cmd->flags & CMD_SIZE_HUGE));
3097 BUG_ON(fix_size > IL_MAX_CMD_SIZE);
3098
3099 if (il_is_rfkill(il) || il_is_ctkill(il)) {
3100 IL_WARN("Not sending command - %s KILL\n",
3101 il_is_rfkill(il) ? "RF" : "CT");
3102 return -EIO;
3103 }
3104
3105 spin_lock_irqsave(&il->hcmd_lock, flags);
3106
3107 if (il_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) {
3108 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3109
3110 IL_ERR("Restarting adapter due to command queue full\n");
3111 queue_work(il->workqueue, &il->restart);
3112 return -ENOSPC;
3113 }
3114
3115 idx = il_get_cmd_idx(q, q->write_ptr, cmd->flags & CMD_SIZE_HUGE);
3116 out_cmd = txq->cmd[idx];
3117 out_meta = &txq->meta[idx];
3118
3119 if (WARN_ON(out_meta->flags & CMD_MAPPED)) {
3120 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3121 return -ENOSPC;
3122 }
3123
3124 memset(out_meta, 0, sizeof(*out_meta)); /* re-initialize to NULL */
3125 out_meta->flags = cmd->flags | CMD_MAPPED;
3126 if (cmd->flags & CMD_WANT_SKB)
3127 out_meta->source = cmd;
3128 if (cmd->flags & CMD_ASYNC)
3129 out_meta->callback = cmd->callback;
3130
3131 out_cmd->hdr.cmd = cmd->id;
3132 memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
3133
3134 /* At this point, the out_cmd now has all of the incoming cmd
3135 * information */
3136
3137 out_cmd->hdr.flags = 0;
3138 out_cmd->hdr.sequence =
3139 cpu_to_le16(QUEUE_TO_SEQ(il->cmd_queue) | IDX_TO_SEQ(q->write_ptr));
3140 if (cmd->flags & CMD_SIZE_HUGE)
3141 out_cmd->hdr.sequence |= SEQ_HUGE_FRAME;
3142 len = sizeof(struct il_device_cmd);
3143 if (idx == TFD_CMD_SLOTS)
3144 len = IL_MAX_CMD_SIZE;
3145
3146 #ifdef CONFIG_IWLEGACY_DEBUG
3147 switch (out_cmd->hdr.cmd) {
3148 case C_TX_LINK_QUALITY_CMD:
3149 case C_SENSITIVITY:
3150 D_HC_DUMP("Sending command %s (#%x), seq: 0x%04X, "
3151 "%d bytes at %d[%d]:%d\n",
3152 il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3153 le16_to_cpu(out_cmd->hdr.sequence), fix_size,
3154 q->write_ptr, idx, il->cmd_queue);
3155 break;
3156 default:
3157 D_HC("Sending command %s (#%x), seq: 0x%04X, "
3158 "%d bytes at %d[%d]:%d\n",
3159 il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3160 le16_to_cpu(out_cmd->hdr.sequence), fix_size, q->write_ptr,
3161 idx, il->cmd_queue);
3162 }
3163 #endif
3164 txq->need_update = 1;
3165
3166 if (il->ops->txq_update_byte_cnt_tbl)
3167 /* Set up entry in queue's byte count circular buffer */
3168 il->ops->txq_update_byte_cnt_tbl(il, txq, 0);
3169
3170 phys_addr =
3171 pci_map_single(il->pci_dev, &out_cmd->hdr, fix_size,
3172 PCI_DMA_BIDIRECTIONAL);
3173 dma_unmap_addr_set(out_meta, mapping, phys_addr);
3174 dma_unmap_len_set(out_meta, len, fix_size);
3175
3176 il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, fix_size, 1,
3177 U32_PAD(cmd->len));
3178
3179 /* Increment and update queue's write idx */
3180 q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
3181 il_txq_update_write_ptr(il, txq);
3182
3183 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3184 return idx;
3185 }
3186
3187 /**
3188 * il_hcmd_queue_reclaim - Reclaim TX command queue entries already Tx'd
3189 *
3190 * When FW advances 'R' idx, all entries between old and new 'R' idx
3191 * need to be reclaimed. As result, some free space forms. If there is
3192 * enough free space (> low mark), wake the stack that feeds us.
3193 */
3194 static void
3195 il_hcmd_queue_reclaim(struct il_priv *il, int txq_id, int idx, int cmd_idx)
3196 {
3197 struct il_tx_queue *txq = &il->txq[txq_id];
3198 struct il_queue *q = &txq->q;
3199 int nfreed = 0;
3200
3201 if (idx >= q->n_bd || il_queue_used(q, idx) == 0) {
3202 IL_ERR("Read idx for DMA queue txq id (%d), idx %d, "
3203 "is out of range [0-%d] %d %d.\n", txq_id, idx, q->n_bd,
3204 q->write_ptr, q->read_ptr);
3205 return;
3206 }
3207
3208 for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx;
3209 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3210
3211 if (nfreed++ > 0) {
3212 IL_ERR("HCMD skipped: idx (%d) %d %d\n", idx,
3213 q->write_ptr, q->read_ptr);
3214 queue_work(il->workqueue, &il->restart);
3215 }
3216
3217 }
3218 }
3219
3220 /**
3221 * il_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3222 * @rxb: Rx buffer to reclaim
3223 *
3224 * If an Rx buffer has an async callback associated with it the callback
3225 * will be executed. The attached skb (if present) will only be freed
3226 * if the callback returns 1
3227 */
3228 void
3229 il_tx_cmd_complete(struct il_priv *il, struct il_rx_buf *rxb)
3230 {
3231 struct il_rx_pkt *pkt = rxb_addr(rxb);
3232 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3233 int txq_id = SEQ_TO_QUEUE(sequence);
3234 int idx = SEQ_TO_IDX(sequence);
3235 int cmd_idx;
3236 bool huge = !!(pkt->hdr.sequence & SEQ_HUGE_FRAME);
3237 struct il_device_cmd *cmd;
3238 struct il_cmd_meta *meta;
3239 struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3240 unsigned long flags;
3241
3242 /* If a Tx command is being handled and it isn't in the actual
3243 * command queue then there a command routing bug has been introduced
3244 * in the queue management code. */
3245 if (WARN
3246 (txq_id != il->cmd_queue,
3247 "wrong command queue %d (should be %d), sequence 0x%X readp=%d writep=%d\n",
3248 txq_id, il->cmd_queue, sequence, il->txq[il->cmd_queue].q.read_ptr,
3249 il->txq[il->cmd_queue].q.write_ptr)) {
3250 il_print_hex_error(il, pkt, 32);
3251 return;
3252 }
3253
3254 cmd_idx = il_get_cmd_idx(&txq->q, idx, huge);
3255 cmd = txq->cmd[cmd_idx];
3256 meta = &txq->meta[cmd_idx];
3257
3258 txq->time_stamp = jiffies;
3259
3260 pci_unmap_single(il->pci_dev, dma_unmap_addr(meta, mapping),
3261 dma_unmap_len(meta, len), PCI_DMA_BIDIRECTIONAL);
3262
3263 /* Input error checking is done when commands are added to queue. */
3264 if (meta->flags & CMD_WANT_SKB) {
3265 meta->source->reply_page = (unsigned long)rxb_addr(rxb);
3266 rxb->page = NULL;
3267 } else if (meta->callback)
3268 meta->callback(il, cmd, pkt);
3269
3270 spin_lock_irqsave(&il->hcmd_lock, flags);
3271
3272 il_hcmd_queue_reclaim(il, txq_id, idx, cmd_idx);
3273
3274 if (!(meta->flags & CMD_ASYNC)) {
3275 clear_bit(S_HCMD_ACTIVE, &il->status);
3276 D_INFO("Clearing HCMD_ACTIVE for command %s\n",
3277 il_get_cmd_string(cmd->hdr.cmd));
3278 wake_up(&il->wait_command_queue);
3279 }
3280
3281 /* Mark as unmapped */
3282 meta->flags = 0;
3283
3284 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3285 }
3286 EXPORT_SYMBOL(il_tx_cmd_complete);
3287
3288 MODULE_DESCRIPTION("iwl-legacy: common functions for 3945 and 4965");
3289 MODULE_VERSION(IWLWIFI_VERSION);
3290 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
3291 MODULE_LICENSE("GPL");
3292
3293 /*
3294 * set bt_coex_active to true, uCode will do kill/defer
3295 * every time the priority line is asserted (BT is sending signals on the
3296 * priority line in the PCIx).
3297 * set bt_coex_active to false, uCode will ignore the BT activity and
3298 * perform the normal operation
3299 *
3300 * User might experience transmit issue on some platform due to WiFi/BT
3301 * co-exist problem. The possible behaviors are:
3302 * Able to scan and finding all the available AP
3303 * Not able to associate with any AP
3304 * On those platforms, WiFi communication can be restored by set
3305 * "bt_coex_active" module parameter to "false"
3306 *
3307 * default: bt_coex_active = true (BT_COEX_ENABLE)
3308 */
3309 static bool bt_coex_active = true;
3310 module_param(bt_coex_active, bool, S_IRUGO);
3311 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
3312
3313 u32 il_debug_level;
3314 EXPORT_SYMBOL(il_debug_level);
3315
3316 const u8 il_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
3317 EXPORT_SYMBOL(il_bcast_addr);
3318
3319 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
3320 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
3321 static void
3322 il_init_ht_hw_capab(const struct il_priv *il,
3323 struct ieee80211_sta_ht_cap *ht_info,
3324 enum ieee80211_band band)
3325 {
3326 u16 max_bit_rate = 0;
3327 u8 rx_chains_num = il->hw_params.rx_chains_num;
3328 u8 tx_chains_num = il->hw_params.tx_chains_num;
3329
3330 ht_info->cap = 0;
3331 memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
3332
3333 ht_info->ht_supported = true;
3334
3335 ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
3336 max_bit_rate = MAX_BIT_RATE_20_MHZ;
3337 if (il->hw_params.ht40_channel & BIT(band)) {
3338 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
3339 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
3340 ht_info->mcs.rx_mask[4] = 0x01;
3341 max_bit_rate = MAX_BIT_RATE_40_MHZ;
3342 }
3343
3344 if (il->cfg->mod_params->amsdu_size_8K)
3345 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
3346
3347 ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3348 ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3349
3350 ht_info->mcs.rx_mask[0] = 0xFF;
3351 if (rx_chains_num >= 2)
3352 ht_info->mcs.rx_mask[1] = 0xFF;
3353 if (rx_chains_num >= 3)
3354 ht_info->mcs.rx_mask[2] = 0xFF;
3355
3356 /* Highest supported Rx data rate */
3357 max_bit_rate *= rx_chains_num;
3358 WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
3359 ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
3360
3361 /* Tx MCS capabilities */
3362 ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
3363 if (tx_chains_num != rx_chains_num) {
3364 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
3365 ht_info->mcs.tx_params |=
3366 ((tx_chains_num -
3367 1) << IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
3368 }
3369 }
3370
3371 /**
3372 * il_init_geos - Initialize mac80211's geo/channel info based from eeprom
3373 */
3374 int
3375 il_init_geos(struct il_priv *il)
3376 {
3377 struct il_channel_info *ch;
3378 struct ieee80211_supported_band *sband;
3379 struct ieee80211_channel *channels;
3380 struct ieee80211_channel *geo_ch;
3381 struct ieee80211_rate *rates;
3382 int i = 0;
3383 s8 max_tx_power = 0;
3384
3385 if (il->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
3386 il->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
3387 D_INFO("Geography modes already initialized.\n");
3388 set_bit(S_GEO_CONFIGURED, &il->status);
3389 return 0;
3390 }
3391
3392 channels =
3393 kzalloc(sizeof(struct ieee80211_channel) * il->channel_count,
3394 GFP_KERNEL);
3395 if (!channels)
3396 return -ENOMEM;
3397
3398 rates =
3399 kzalloc((sizeof(struct ieee80211_rate) * RATE_COUNT_LEGACY),
3400 GFP_KERNEL);
3401 if (!rates) {
3402 kfree(channels);
3403 return -ENOMEM;
3404 }
3405
3406 /* 5.2GHz channels start after the 2.4GHz channels */
3407 sband = &il->bands[IEEE80211_BAND_5GHZ];
3408 sband->channels = &channels[ARRAY_SIZE(il_eeprom_band_1)];
3409 /* just OFDM */
3410 sband->bitrates = &rates[IL_FIRST_OFDM_RATE];
3411 sband->n_bitrates = RATE_COUNT_LEGACY - IL_FIRST_OFDM_RATE;
3412
3413 if (il->cfg->sku & IL_SKU_N)
3414 il_init_ht_hw_capab(il, &sband->ht_cap, IEEE80211_BAND_5GHZ);
3415
3416 sband = &il->bands[IEEE80211_BAND_2GHZ];
3417 sband->channels = channels;
3418 /* OFDM & CCK */
3419 sband->bitrates = rates;
3420 sband->n_bitrates = RATE_COUNT_LEGACY;
3421
3422 if (il->cfg->sku & IL_SKU_N)
3423 il_init_ht_hw_capab(il, &sband->ht_cap, IEEE80211_BAND_2GHZ);
3424
3425 il->ieee_channels = channels;
3426 il->ieee_rates = rates;
3427
3428 for (i = 0; i < il->channel_count; i++) {
3429 ch = &il->channel_info[i];
3430
3431 if (!il_is_channel_valid(ch))
3432 continue;
3433
3434 sband = &il->bands[ch->band];
3435
3436 geo_ch = &sband->channels[sband->n_channels++];
3437
3438 geo_ch->center_freq =
3439 ieee80211_channel_to_frequency(ch->channel, ch->band);
3440 geo_ch->max_power = ch->max_power_avg;
3441 geo_ch->max_antenna_gain = 0xff;
3442 geo_ch->hw_value = ch->channel;
3443
3444 if (il_is_channel_valid(ch)) {
3445 if (!(ch->flags & EEPROM_CHANNEL_IBSS))
3446 geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
3447
3448 if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
3449 geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
3450
3451 if (ch->flags & EEPROM_CHANNEL_RADAR)
3452 geo_ch->flags |= IEEE80211_CHAN_RADAR;
3453
3454 geo_ch->flags |= ch->ht40_extension_channel;
3455
3456 if (ch->max_power_avg > max_tx_power)
3457 max_tx_power = ch->max_power_avg;
3458 } else {
3459 geo_ch->flags |= IEEE80211_CHAN_DISABLED;
3460 }
3461
3462 D_INFO("Channel %d Freq=%d[%sGHz] %s flag=0x%X\n", ch->channel,
3463 geo_ch->center_freq,
3464 il_is_channel_a_band(ch) ? "5.2" : "2.4",
3465 geo_ch->
3466 flags & IEEE80211_CHAN_DISABLED ? "restricted" : "valid",
3467 geo_ch->flags);
3468 }
3469
3470 il->tx_power_device_lmt = max_tx_power;
3471 il->tx_power_user_lmt = max_tx_power;
3472 il->tx_power_next = max_tx_power;
3473
3474 if (il->bands[IEEE80211_BAND_5GHZ].n_channels == 0 &&
3475 (il->cfg->sku & IL_SKU_A)) {
3476 IL_INFO("Incorrectly detected BG card as ABG. "
3477 "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
3478 il->pci_dev->device, il->pci_dev->subsystem_device);
3479 il->cfg->sku &= ~IL_SKU_A;
3480 }
3481
3482 IL_INFO("Tunable channels: %d 802.11bg, %d 802.11a channels\n",
3483 il->bands[IEEE80211_BAND_2GHZ].n_channels,
3484 il->bands[IEEE80211_BAND_5GHZ].n_channels);
3485
3486 set_bit(S_GEO_CONFIGURED, &il->status);
3487
3488 return 0;
3489 }
3490 EXPORT_SYMBOL(il_init_geos);
3491
3492 /*
3493 * il_free_geos - undo allocations in il_init_geos
3494 */
3495 void
3496 il_free_geos(struct il_priv *il)
3497 {
3498 kfree(il->ieee_channels);
3499 kfree(il->ieee_rates);
3500 clear_bit(S_GEO_CONFIGURED, &il->status);
3501 }
3502 EXPORT_SYMBOL(il_free_geos);
3503
3504 static bool
3505 il_is_channel_extension(struct il_priv *il, enum ieee80211_band band,
3506 u16 channel, u8 extension_chan_offset)
3507 {
3508 const struct il_channel_info *ch_info;
3509
3510 ch_info = il_get_channel_info(il, band, channel);
3511 if (!il_is_channel_valid(ch_info))
3512 return false;
3513
3514 if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
3515 return !(ch_info->
3516 ht40_extension_channel & IEEE80211_CHAN_NO_HT40PLUS);
3517 else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
3518 return !(ch_info->
3519 ht40_extension_channel & IEEE80211_CHAN_NO_HT40MINUS);
3520
3521 return false;
3522 }
3523
3524 bool
3525 il_is_ht40_tx_allowed(struct il_priv *il, struct ieee80211_sta_ht_cap *ht_cap)
3526 {
3527 if (!il->ht.enabled || !il->ht.is_40mhz)
3528 return false;
3529
3530 /*
3531 * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
3532 * the bit will not set if it is pure 40MHz case
3533 */
3534 if (ht_cap && !ht_cap->ht_supported)
3535 return false;
3536
3537 #ifdef CONFIG_IWLEGACY_DEBUGFS
3538 if (il->disable_ht40)
3539 return false;
3540 #endif
3541
3542 return il_is_channel_extension(il, il->band,
3543 le16_to_cpu(il->staging.channel),
3544 il->ht.extension_chan_offset);
3545 }
3546 EXPORT_SYMBOL(il_is_ht40_tx_allowed);
3547
3548 static u16
3549 il_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
3550 {
3551 u16 new_val;
3552 u16 beacon_factor;
3553
3554 /*
3555 * If mac80211 hasn't given us a beacon interval, program
3556 * the default into the device.
3557 */
3558 if (!beacon_val)
3559 return DEFAULT_BEACON_INTERVAL;
3560
3561 /*
3562 * If the beacon interval we obtained from the peer
3563 * is too large, we'll have to wake up more often
3564 * (and in IBSS case, we'll beacon too much)
3565 *
3566 * For example, if max_beacon_val is 4096, and the
3567 * requested beacon interval is 7000, we'll have to
3568 * use 3500 to be able to wake up on the beacons.
3569 *
3570 * This could badly influence beacon detection stats.
3571 */
3572
3573 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
3574 new_val = beacon_val / beacon_factor;
3575
3576 if (!new_val)
3577 new_val = max_beacon_val;
3578
3579 return new_val;
3580 }
3581
3582 int
3583 il_send_rxon_timing(struct il_priv *il)
3584 {
3585 u64 tsf;
3586 s32 interval_tm, rem;
3587 struct ieee80211_conf *conf = NULL;
3588 u16 beacon_int;
3589 struct ieee80211_vif *vif = il->vif;
3590
3591 conf = &il->hw->conf;
3592
3593 lockdep_assert_held(&il->mutex);
3594
3595 memset(&il->timing, 0, sizeof(struct il_rxon_time_cmd));
3596
3597 il->timing.timestamp = cpu_to_le64(il->timestamp);
3598 il->timing.listen_interval = cpu_to_le16(conf->listen_interval);
3599
3600 beacon_int = vif ? vif->bss_conf.beacon_int : 0;
3601
3602 /*
3603 * TODO: For IBSS we need to get atim_win from mac80211,
3604 * for now just always use 0
3605 */
3606 il->timing.atim_win = 0;
3607
3608 beacon_int =
3609 il_adjust_beacon_interval(beacon_int,
3610 il->hw_params.max_beacon_itrvl *
3611 TIME_UNIT);
3612 il->timing.beacon_interval = cpu_to_le16(beacon_int);
3613
3614 tsf = il->timestamp; /* tsf is modifed by do_div: copy it */
3615 interval_tm = beacon_int * TIME_UNIT;
3616 rem = do_div(tsf, interval_tm);
3617 il->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
3618
3619 il->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ? : 1) : 1;
3620
3621 D_ASSOC("beacon interval %d beacon timer %d beacon tim %d\n",
3622 le16_to_cpu(il->timing.beacon_interval),
3623 le32_to_cpu(il->timing.beacon_init_val),
3624 le16_to_cpu(il->timing.atim_win));
3625
3626 return il_send_cmd_pdu(il, C_RXON_TIMING, sizeof(il->timing),
3627 &il->timing);
3628 }
3629 EXPORT_SYMBOL(il_send_rxon_timing);
3630
3631 void
3632 il_set_rxon_hwcrypto(struct il_priv *il, int hw_decrypt)
3633 {
3634 struct il_rxon_cmd *rxon = &il->staging;
3635
3636 if (hw_decrypt)
3637 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
3638 else
3639 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
3640
3641 }
3642 EXPORT_SYMBOL(il_set_rxon_hwcrypto);
3643
3644 /* validate RXON structure is valid */
3645 int
3646 il_check_rxon_cmd(struct il_priv *il)
3647 {
3648 struct il_rxon_cmd *rxon = &il->staging;
3649 bool error = false;
3650
3651 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
3652 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
3653 IL_WARN("check 2.4G: wrong narrow\n");
3654 error = true;
3655 }
3656 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
3657 IL_WARN("check 2.4G: wrong radar\n");
3658 error = true;
3659 }
3660 } else {
3661 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
3662 IL_WARN("check 5.2G: not short slot!\n");
3663 error = true;
3664 }
3665 if (rxon->flags & RXON_FLG_CCK_MSK) {
3666 IL_WARN("check 5.2G: CCK!\n");
3667 error = true;
3668 }
3669 }
3670 if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
3671 IL_WARN("mac/bssid mcast!\n");
3672 error = true;
3673 }
3674
3675 /* make sure basic rates 6Mbps and 1Mbps are supported */
3676 if ((rxon->ofdm_basic_rates & RATE_6M_MASK) == 0 &&
3677 (rxon->cck_basic_rates & RATE_1M_MASK) == 0) {
3678 IL_WARN("neither 1 nor 6 are basic\n");
3679 error = true;
3680 }
3681
3682 if (le16_to_cpu(rxon->assoc_id) > 2007) {
3683 IL_WARN("aid > 2007\n");
3684 error = true;
3685 }
3686
3687 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) ==
3688 (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
3689 IL_WARN("CCK and short slot\n");
3690 error = true;
3691 }
3692
3693 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) ==
3694 (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
3695 IL_WARN("CCK and auto detect");
3696 error = true;
3697 }
3698
3699 if ((rxon->
3700 flags & (RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK)) ==
3701 RXON_FLG_TGG_PROTECT_MSK) {
3702 IL_WARN("TGg but no auto-detect\n");
3703 error = true;
3704 }
3705
3706 if (error)
3707 IL_WARN("Tuning to channel %d\n", le16_to_cpu(rxon->channel));
3708
3709 if (error) {
3710 IL_ERR("Invalid RXON\n");
3711 return -EINVAL;
3712 }
3713 return 0;
3714 }
3715 EXPORT_SYMBOL(il_check_rxon_cmd);
3716
3717 /**
3718 * il_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
3719 * @il: staging_rxon is compared to active_rxon
3720 *
3721 * If the RXON structure is changing enough to require a new tune,
3722 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
3723 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
3724 */
3725 int
3726 il_full_rxon_required(struct il_priv *il)
3727 {
3728 const struct il_rxon_cmd *staging = &il->staging;
3729 const struct il_rxon_cmd *active = &il->active;
3730
3731 #define CHK(cond) \
3732 if ((cond)) { \
3733 D_INFO("need full RXON - " #cond "\n"); \
3734 return 1; \
3735 }
3736
3737 #define CHK_NEQ(c1, c2) \
3738 if ((c1) != (c2)) { \
3739 D_INFO("need full RXON - " \
3740 #c1 " != " #c2 " - %d != %d\n", \
3741 (c1), (c2)); \
3742 return 1; \
3743 }
3744
3745 /* These items are only settable from the full RXON command */
3746 CHK(!il_is_associated(il));
3747 CHK(!ether_addr_equal(staging->bssid_addr, active->bssid_addr));
3748 CHK(!ether_addr_equal(staging->node_addr, active->node_addr));
3749 CHK(!ether_addr_equal(staging->wlap_bssid_addr,
3750 active->wlap_bssid_addr));
3751 CHK_NEQ(staging->dev_type, active->dev_type);
3752 CHK_NEQ(staging->channel, active->channel);
3753 CHK_NEQ(staging->air_propagation, active->air_propagation);
3754 CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
3755 active->ofdm_ht_single_stream_basic_rates);
3756 CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
3757 active->ofdm_ht_dual_stream_basic_rates);
3758 CHK_NEQ(staging->assoc_id, active->assoc_id);
3759
3760 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
3761 * be updated with the RXON_ASSOC command -- however only some
3762 * flag transitions are allowed using RXON_ASSOC */
3763
3764 /* Check if we are not switching bands */
3765 CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
3766 active->flags & RXON_FLG_BAND_24G_MSK);
3767
3768 /* Check if we are switching association toggle */
3769 CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
3770 active->filter_flags & RXON_FILTER_ASSOC_MSK);
3771
3772 #undef CHK
3773 #undef CHK_NEQ
3774
3775 return 0;
3776 }
3777 EXPORT_SYMBOL(il_full_rxon_required);
3778
3779 u8
3780 il_get_lowest_plcp(struct il_priv *il)
3781 {
3782 /*
3783 * Assign the lowest rate -- should really get this from
3784 * the beacon skb from mac80211.
3785 */
3786 if (il->staging.flags & RXON_FLG_BAND_24G_MSK)
3787 return RATE_1M_PLCP;
3788 else
3789 return RATE_6M_PLCP;
3790 }
3791 EXPORT_SYMBOL(il_get_lowest_plcp);
3792
3793 static void
3794 _il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3795 {
3796 struct il_rxon_cmd *rxon = &il->staging;
3797
3798 if (!il->ht.enabled) {
3799 rxon->flags &=
3800 ~(RXON_FLG_CHANNEL_MODE_MSK |
3801 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK | RXON_FLG_HT40_PROT_MSK
3802 | RXON_FLG_HT_PROT_MSK);
3803 return;
3804 }
3805
3806 rxon->flags |=
3807 cpu_to_le32(il->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
3808
3809 /* Set up channel bandwidth:
3810 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
3811 /* clear the HT channel mode before set the mode */
3812 rxon->flags &=
3813 ~(RXON_FLG_CHANNEL_MODE_MSK | RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3814 if (il_is_ht40_tx_allowed(il, NULL)) {
3815 /* pure ht40 */
3816 if (il->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
3817 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
3818 /* Note: control channel is opposite of extension channel */
3819 switch (il->ht.extension_chan_offset) {
3820 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3821 rxon->flags &=
3822 ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3823 break;
3824 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3825 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3826 break;
3827 }
3828 } else {
3829 /* Note: control channel is opposite of extension channel */
3830 switch (il->ht.extension_chan_offset) {
3831 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3832 rxon->flags &=
3833 ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3834 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3835 break;
3836 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3837 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3838 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3839 break;
3840 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3841 default:
3842 /* channel location only valid if in Mixed mode */
3843 IL_ERR("invalid extension channel offset\n");
3844 break;
3845 }
3846 }
3847 } else {
3848 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
3849 }
3850
3851 if (il->ops->set_rxon_chain)
3852 il->ops->set_rxon_chain(il);
3853
3854 D_ASSOC("rxon flags 0x%X operation mode :0x%X "
3855 "extension channel offset 0x%x\n", le32_to_cpu(rxon->flags),
3856 il->ht.protection, il->ht.extension_chan_offset);
3857 }
3858
3859 void
3860 il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3861 {
3862 _il_set_rxon_ht(il, ht_conf);
3863 }
3864 EXPORT_SYMBOL(il_set_rxon_ht);
3865
3866 /* Return valid, unused, channel for a passive scan to reset the RF */
3867 u8
3868 il_get_single_channel_number(struct il_priv *il, enum ieee80211_band band)
3869 {
3870 const struct il_channel_info *ch_info;
3871 int i;
3872 u8 channel = 0;
3873 u8 min, max;
3874
3875 if (band == IEEE80211_BAND_5GHZ) {
3876 min = 14;
3877 max = il->channel_count;
3878 } else {
3879 min = 0;
3880 max = 14;
3881 }
3882
3883 for (i = min; i < max; i++) {
3884 channel = il->channel_info[i].channel;
3885 if (channel == le16_to_cpu(il->staging.channel))
3886 continue;
3887
3888 ch_info = il_get_channel_info(il, band, channel);
3889 if (il_is_channel_valid(ch_info))
3890 break;
3891 }
3892
3893 return channel;
3894 }
3895 EXPORT_SYMBOL(il_get_single_channel_number);
3896
3897 /**
3898 * il_set_rxon_channel - Set the band and channel values in staging RXON
3899 * @ch: requested channel as a pointer to struct ieee80211_channel
3900
3901 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
3902 * in the staging RXON flag structure based on the ch->band
3903 */
3904 int
3905 il_set_rxon_channel(struct il_priv *il, struct ieee80211_channel *ch)
3906 {
3907 enum ieee80211_band band = ch->band;
3908 u16 channel = ch->hw_value;
3909
3910 if (le16_to_cpu(il->staging.channel) == channel && il->band == band)
3911 return 0;
3912
3913 il->staging.channel = cpu_to_le16(channel);
3914 if (band == IEEE80211_BAND_5GHZ)
3915 il->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
3916 else
3917 il->staging.flags |= RXON_FLG_BAND_24G_MSK;
3918
3919 il->band = band;
3920
3921 D_INFO("Staging channel set to %d [%d]\n", channel, band);
3922
3923 return 0;
3924 }
3925 EXPORT_SYMBOL(il_set_rxon_channel);
3926
3927 void
3928 il_set_flags_for_band(struct il_priv *il, enum ieee80211_band band,
3929 struct ieee80211_vif *vif)
3930 {
3931 if (band == IEEE80211_BAND_5GHZ) {
3932 il->staging.flags &=
3933 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK |
3934 RXON_FLG_CCK_MSK);
3935 il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3936 } else {
3937 /* Copied from il_post_associate() */
3938 if (vif && vif->bss_conf.use_short_slot)
3939 il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3940 else
3941 il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
3942
3943 il->staging.flags |= RXON_FLG_BAND_24G_MSK;
3944 il->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
3945 il->staging.flags &= ~RXON_FLG_CCK_MSK;
3946 }
3947 }
3948 EXPORT_SYMBOL(il_set_flags_for_band);
3949
3950 /*
3951 * initialize rxon structure with default values from eeprom
3952 */
3953 void
3954 il_connection_init_rx_config(struct il_priv *il)
3955 {
3956 const struct il_channel_info *ch_info;
3957
3958 memset(&il->staging, 0, sizeof(il->staging));
3959
3960 if (!il->vif) {
3961 il->staging.dev_type = RXON_DEV_TYPE_ESS;
3962 } else if (il->vif->type == NL80211_IFTYPE_STATION) {
3963 il->staging.dev_type = RXON_DEV_TYPE_ESS;
3964 il->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
3965 } else if (il->vif->type == NL80211_IFTYPE_ADHOC) {
3966 il->staging.dev_type = RXON_DEV_TYPE_IBSS;
3967 il->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
3968 il->staging.filter_flags =
3969 RXON_FILTER_BCON_AWARE_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
3970 } else {
3971 IL_ERR("Unsupported interface type %d\n", il->vif->type);
3972 return;
3973 }
3974
3975 #if 0
3976 /* TODO: Figure out when short_preamble would be set and cache from
3977 * that */
3978 if (!hw_to_local(il->hw)->short_preamble)
3979 il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
3980 else
3981 il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
3982 #endif
3983
3984 ch_info =
3985 il_get_channel_info(il, il->band, le16_to_cpu(il->active.channel));
3986
3987 if (!ch_info)
3988 ch_info = &il->channel_info[0];
3989
3990 il->staging.channel = cpu_to_le16(ch_info->channel);
3991 il->band = ch_info->band;
3992
3993 il_set_flags_for_band(il, il->band, il->vif);
3994
3995 il->staging.ofdm_basic_rates =
3996 (IL_OFDM_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
3997 il->staging.cck_basic_rates =
3998 (IL_CCK_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
3999
4000 /* clear both MIX and PURE40 mode flag */
4001 il->staging.flags &=
4002 ~(RXON_FLG_CHANNEL_MODE_MIXED | RXON_FLG_CHANNEL_MODE_PURE_40);
4003 if (il->vif)
4004 memcpy(il->staging.node_addr, il->vif->addr, ETH_ALEN);
4005
4006 il->staging.ofdm_ht_single_stream_basic_rates = 0xff;
4007 il->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
4008 }
4009 EXPORT_SYMBOL(il_connection_init_rx_config);
4010
4011 void
4012 il_set_rate(struct il_priv *il)
4013 {
4014 const struct ieee80211_supported_band *hw = NULL;
4015 struct ieee80211_rate *rate;
4016 int i;
4017
4018 hw = il_get_hw_mode(il, il->band);
4019 if (!hw) {
4020 IL_ERR("Failed to set rate: unable to get hw mode\n");
4021 return;
4022 }
4023
4024 il->active_rate = 0;
4025
4026 for (i = 0; i < hw->n_bitrates; i++) {
4027 rate = &(hw->bitrates[i]);
4028 if (rate->hw_value < RATE_COUNT_LEGACY)
4029 il->active_rate |= (1 << rate->hw_value);
4030 }
4031
4032 D_RATE("Set active_rate = %0x\n", il->active_rate);
4033
4034 il->staging.cck_basic_rates =
4035 (IL_CCK_BASIC_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
4036
4037 il->staging.ofdm_basic_rates =
4038 (IL_OFDM_BASIC_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
4039 }
4040 EXPORT_SYMBOL(il_set_rate);
4041
4042 void
4043 il_chswitch_done(struct il_priv *il, bool is_success)
4044 {
4045 if (test_bit(S_EXIT_PENDING, &il->status))
4046 return;
4047
4048 if (test_and_clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4049 ieee80211_chswitch_done(il->vif, is_success);
4050 }
4051 EXPORT_SYMBOL(il_chswitch_done);
4052
4053 void
4054 il_hdl_csa(struct il_priv *il, struct il_rx_buf *rxb)
4055 {
4056 struct il_rx_pkt *pkt = rxb_addr(rxb);
4057 struct il_csa_notification *csa = &(pkt->u.csa_notif);
4058 struct il_rxon_cmd *rxon = (void *)&il->active;
4059
4060 if (!test_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4061 return;
4062
4063 if (!le32_to_cpu(csa->status) && csa->channel == il->switch_channel) {
4064 rxon->channel = csa->channel;
4065 il->staging.channel = csa->channel;
4066 D_11H("CSA notif: channel %d\n", le16_to_cpu(csa->channel));
4067 il_chswitch_done(il, true);
4068 } else {
4069 IL_ERR("CSA notif (fail) : channel %d\n",
4070 le16_to_cpu(csa->channel));
4071 il_chswitch_done(il, false);
4072 }
4073 }
4074 EXPORT_SYMBOL(il_hdl_csa);
4075
4076 #ifdef CONFIG_IWLEGACY_DEBUG
4077 void
4078 il_print_rx_config_cmd(struct il_priv *il)
4079 {
4080 struct il_rxon_cmd *rxon = &il->staging;
4081
4082 D_RADIO("RX CONFIG:\n");
4083 il_print_hex_dump(il, IL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4084 D_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4085 D_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4086 D_RADIO("u32 filter_flags: 0x%08x\n", le32_to_cpu(rxon->filter_flags));
4087 D_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4088 D_RADIO("u8 ofdm_basic_rates: 0x%02x\n", rxon->ofdm_basic_rates);
4089 D_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4090 D_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr);
4091 D_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
4092 D_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4093 }
4094 EXPORT_SYMBOL(il_print_rx_config_cmd);
4095 #endif
4096 /**
4097 * il_irq_handle_error - called for HW or SW error interrupt from card
4098 */
4099 void
4100 il_irq_handle_error(struct il_priv *il)
4101 {
4102 /* Set the FW error flag -- cleared on il_down */
4103 set_bit(S_FW_ERROR, &il->status);
4104
4105 /* Cancel currently queued command. */
4106 clear_bit(S_HCMD_ACTIVE, &il->status);
4107
4108 IL_ERR("Loaded firmware version: %s\n", il->hw->wiphy->fw_version);
4109
4110 il->ops->dump_nic_error_log(il);
4111 if (il->ops->dump_fh)
4112 il->ops->dump_fh(il, NULL, false);
4113 #ifdef CONFIG_IWLEGACY_DEBUG
4114 if (il_get_debug_level(il) & IL_DL_FW_ERRORS)
4115 il_print_rx_config_cmd(il);
4116 #endif
4117
4118 wake_up(&il->wait_command_queue);
4119
4120 /* Keep the restart process from trying to send host
4121 * commands by clearing the INIT status bit */
4122 clear_bit(S_READY, &il->status);
4123
4124 if (!test_bit(S_EXIT_PENDING, &il->status)) {
4125 IL_DBG(IL_DL_FW_ERRORS,
4126 "Restarting adapter due to uCode error.\n");
4127
4128 if (il->cfg->mod_params->restart_fw)
4129 queue_work(il->workqueue, &il->restart);
4130 }
4131 }
4132 EXPORT_SYMBOL(il_irq_handle_error);
4133
4134 static int
4135 _il_apm_stop_master(struct il_priv *il)
4136 {
4137 int ret = 0;
4138
4139 /* stop device's busmaster DMA activity */
4140 _il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
4141
4142 ret =
4143 _il_poll_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
4144 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
4145 if (ret < 0)
4146 IL_WARN("Master Disable Timed Out, 100 usec\n");
4147
4148 D_INFO("stop master\n");
4149
4150 return ret;
4151 }
4152
4153 void
4154 _il_apm_stop(struct il_priv *il)
4155 {
4156 lockdep_assert_held(&il->reg_lock);
4157
4158 D_INFO("Stop card, put in low power state\n");
4159
4160 /* Stop device's DMA activity */
4161 _il_apm_stop_master(il);
4162
4163 /* Reset the entire device */
4164 _il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
4165
4166 udelay(10);
4167
4168 /*
4169 * Clear "initialization complete" bit to move adapter from
4170 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
4171 */
4172 _il_clear_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4173 }
4174 EXPORT_SYMBOL(_il_apm_stop);
4175
4176 void
4177 il_apm_stop(struct il_priv *il)
4178 {
4179 unsigned long flags;
4180
4181 spin_lock_irqsave(&il->reg_lock, flags);
4182 _il_apm_stop(il);
4183 spin_unlock_irqrestore(&il->reg_lock, flags);
4184 }
4185 EXPORT_SYMBOL(il_apm_stop);
4186
4187 /*
4188 * Start up NIC's basic functionality after it has been reset
4189 * (e.g. after platform boot, or shutdown via il_apm_stop())
4190 * NOTE: This does not load uCode nor start the embedded processor
4191 */
4192 int
4193 il_apm_init(struct il_priv *il)
4194 {
4195 int ret = 0;
4196 u16 lctl;
4197
4198 D_INFO("Init card's basic functions\n");
4199
4200 /*
4201 * Use "set_bit" below rather than "write", to preserve any hardware
4202 * bits already set by default after reset.
4203 */
4204
4205 /* Disable L0S exit timer (platform NMI Work/Around) */
4206 il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4207 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
4208
4209 /*
4210 * Disable L0s without affecting L1;
4211 * don't wait for ICH L0s (ICH bug W/A)
4212 */
4213 il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4214 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
4215
4216 /* Set FH wait threshold to maximum (HW error during stress W/A) */
4217 il_set_bit(il, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
4218
4219 /*
4220 * Enable HAP INTA (interrupt from management bus) to
4221 * wake device's PCI Express link L1a -> L0s
4222 * NOTE: This is no-op for 3945 (non-existent bit)
4223 */
4224 il_set_bit(il, CSR_HW_IF_CONFIG_REG,
4225 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
4226
4227 /*
4228 * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
4229 * Check if BIOS (or OS) enabled L1-ASPM on this device.
4230 * If so (likely), disable L0S, so device moves directly L0->L1;
4231 * costs negligible amount of power savings.
4232 * If not (unlikely), enable L0S, so there is at least some
4233 * power savings, even without L1.
4234 */
4235 if (il->cfg->set_l0s) {
4236 lctl = il_pcie_link_ctl(il);
4237 if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
4238 PCI_CFG_LINK_CTRL_VAL_L1_EN) {
4239 /* L1-ASPM enabled; disable(!) L0S */
4240 il_set_bit(il, CSR_GIO_REG,
4241 CSR_GIO_REG_VAL_L0S_ENABLED);
4242 D_POWER("L1 Enabled; Disabling L0S\n");
4243 } else {
4244 /* L1-ASPM disabled; enable(!) L0S */
4245 il_clear_bit(il, CSR_GIO_REG,
4246 CSR_GIO_REG_VAL_L0S_ENABLED);
4247 D_POWER("L1 Disabled; Enabling L0S\n");
4248 }
4249 }
4250
4251 /* Configure analog phase-lock-loop before activating to D0A */
4252 if (il->cfg->pll_cfg_val)
4253 il_set_bit(il, CSR_ANA_PLL_CFG,
4254 il->cfg->pll_cfg_val);
4255
4256 /*
4257 * Set "initialization complete" bit to move adapter from
4258 * D0U* --> D0A* (powered-up active) state.
4259 */
4260 il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4261
4262 /*
4263 * Wait for clock stabilization; once stabilized, access to
4264 * device-internal resources is supported, e.g. il_wr_prph()
4265 * and accesses to uCode SRAM.
4266 */
4267 ret =
4268 _il_poll_bit(il, CSR_GP_CNTRL,
4269 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
4270 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
4271 if (ret < 0) {
4272 D_INFO("Failed to init the card\n");
4273 goto out;
4274 }
4275
4276 /*
4277 * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
4278 * BSM (Boostrap State Machine) is only in 3945 and 4965.
4279 *
4280 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
4281 * do not disable clocks. This preserves any hardware bits already
4282 * set by default in "CLK_CTRL_REG" after reset.
4283 */
4284 if (il->cfg->use_bsm)
4285 il_wr_prph(il, APMG_CLK_EN_REG,
4286 APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
4287 else
4288 il_wr_prph(il, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT);
4289 udelay(20);
4290
4291 /* Disable L1-Active */
4292 il_set_bits_prph(il, APMG_PCIDEV_STT_REG,
4293 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
4294
4295 out:
4296 return ret;
4297 }
4298 EXPORT_SYMBOL(il_apm_init);
4299
4300 int
4301 il_set_tx_power(struct il_priv *il, s8 tx_power, bool force)
4302 {
4303 int ret;
4304 s8 prev_tx_power;
4305 bool defer;
4306
4307 lockdep_assert_held(&il->mutex);
4308
4309 if (il->tx_power_user_lmt == tx_power && !force)
4310 return 0;
4311
4312 if (!il->ops->send_tx_power)
4313 return -EOPNOTSUPP;
4314
4315 /* 0 dBm mean 1 milliwatt */
4316 if (tx_power < 0) {
4317 IL_WARN("Requested user TXPOWER %d below 1 mW.\n", tx_power);
4318 return -EINVAL;
4319 }
4320
4321 if (tx_power > il->tx_power_device_lmt) {
4322 IL_WARN("Requested user TXPOWER %d above upper limit %d.\n",
4323 tx_power, il->tx_power_device_lmt);
4324 return -EINVAL;
4325 }
4326
4327 if (!il_is_ready_rf(il))
4328 return -EIO;
4329
4330 /* scan complete and commit_rxon use tx_power_next value,
4331 * it always need to be updated for newest request */
4332 il->tx_power_next = tx_power;
4333
4334 /* do not set tx power when scanning or channel changing */
4335 defer = test_bit(S_SCANNING, &il->status) ||
4336 memcmp(&il->active, &il->staging, sizeof(il->staging));
4337 if (defer && !force) {
4338 D_INFO("Deferring tx power set\n");
4339 return 0;
4340 }
4341
4342 prev_tx_power = il->tx_power_user_lmt;
4343 il->tx_power_user_lmt = tx_power;
4344
4345 ret = il->ops->send_tx_power(il);
4346
4347 /* if fail to set tx_power, restore the orig. tx power */
4348 if (ret) {
4349 il->tx_power_user_lmt = prev_tx_power;
4350 il->tx_power_next = prev_tx_power;
4351 }
4352 return ret;
4353 }
4354 EXPORT_SYMBOL(il_set_tx_power);
4355
4356 void
4357 il_send_bt_config(struct il_priv *il)
4358 {
4359 struct il_bt_cmd bt_cmd = {
4360 .lead_time = BT_LEAD_TIME_DEF,
4361 .max_kill = BT_MAX_KILL_DEF,
4362 .kill_ack_mask = 0,
4363 .kill_cts_mask = 0,
4364 };
4365
4366 if (!bt_coex_active)
4367 bt_cmd.flags = BT_COEX_DISABLE;
4368 else
4369 bt_cmd.flags = BT_COEX_ENABLE;
4370
4371 D_INFO("BT coex %s\n",
4372 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
4373
4374 if (il_send_cmd_pdu(il, C_BT_CONFIG, sizeof(struct il_bt_cmd), &bt_cmd))
4375 IL_ERR("failed to send BT Coex Config\n");
4376 }
4377 EXPORT_SYMBOL(il_send_bt_config);
4378
4379 int
4380 il_send_stats_request(struct il_priv *il, u8 flags, bool clear)
4381 {
4382 struct il_stats_cmd stats_cmd = {
4383 .configuration_flags = clear ? IL_STATS_CONF_CLEAR_STATS : 0,
4384 };
4385
4386 if (flags & CMD_ASYNC)
4387 return il_send_cmd_pdu_async(il, C_STATS, sizeof(struct il_stats_cmd),
4388 &stats_cmd, NULL);
4389 else
4390 return il_send_cmd_pdu(il, C_STATS, sizeof(struct il_stats_cmd),
4391 &stats_cmd);
4392 }
4393 EXPORT_SYMBOL(il_send_stats_request);
4394
4395 void
4396 il_hdl_pm_sleep(struct il_priv *il, struct il_rx_buf *rxb)
4397 {
4398 #ifdef CONFIG_IWLEGACY_DEBUG
4399 struct il_rx_pkt *pkt = rxb_addr(rxb);
4400 struct il_sleep_notification *sleep = &(pkt->u.sleep_notif);
4401 D_RX("sleep mode: %d, src: %d\n",
4402 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
4403 #endif
4404 }
4405 EXPORT_SYMBOL(il_hdl_pm_sleep);
4406
4407 void
4408 il_hdl_pm_debug_stats(struct il_priv *il, struct il_rx_buf *rxb)
4409 {
4410 struct il_rx_pkt *pkt = rxb_addr(rxb);
4411 u32 len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK;
4412 D_RADIO("Dumping %d bytes of unhandled notification for %s:\n", len,
4413 il_get_cmd_string(pkt->hdr.cmd));
4414 il_print_hex_dump(il, IL_DL_RADIO, pkt->u.raw, len);
4415 }
4416 EXPORT_SYMBOL(il_hdl_pm_debug_stats);
4417
4418 void
4419 il_hdl_error(struct il_priv *il, struct il_rx_buf *rxb)
4420 {
4421 struct il_rx_pkt *pkt = rxb_addr(rxb);
4422
4423 IL_ERR("Error Reply type 0x%08X cmd %s (0x%02X) "
4424 "seq 0x%04X ser 0x%08X\n",
4425 le32_to_cpu(pkt->u.err_resp.error_type),
4426 il_get_cmd_string(pkt->u.err_resp.cmd_id),
4427 pkt->u.err_resp.cmd_id,
4428 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
4429 le32_to_cpu(pkt->u.err_resp.error_info));
4430 }
4431 EXPORT_SYMBOL(il_hdl_error);
4432
4433 void
4434 il_clear_isr_stats(struct il_priv *il)
4435 {
4436 memset(&il->isr_stats, 0, sizeof(il->isr_stats));
4437 }
4438
4439 int
4440 il_mac_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u16 queue,
4441 const struct ieee80211_tx_queue_params *params)
4442 {
4443 struct il_priv *il = hw->priv;
4444 unsigned long flags;
4445 int q;
4446
4447 D_MAC80211("enter\n");
4448
4449 if (!il_is_ready_rf(il)) {
4450 D_MAC80211("leave - RF not ready\n");
4451 return -EIO;
4452 }
4453
4454 if (queue >= AC_NUM) {
4455 D_MAC80211("leave - queue >= AC_NUM %d\n", queue);
4456 return 0;
4457 }
4458
4459 q = AC_NUM - 1 - queue;
4460
4461 spin_lock_irqsave(&il->lock, flags);
4462
4463 il->qos_data.def_qos_parm.ac[q].cw_min =
4464 cpu_to_le16(params->cw_min);
4465 il->qos_data.def_qos_parm.ac[q].cw_max =
4466 cpu_to_le16(params->cw_max);
4467 il->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
4468 il->qos_data.def_qos_parm.ac[q].edca_txop =
4469 cpu_to_le16((params->txop * 32));
4470
4471 il->qos_data.def_qos_parm.ac[q].reserved1 = 0;
4472
4473 spin_unlock_irqrestore(&il->lock, flags);
4474
4475 D_MAC80211("leave\n");
4476 return 0;
4477 }
4478 EXPORT_SYMBOL(il_mac_conf_tx);
4479
4480 int
4481 il_mac_tx_last_beacon(struct ieee80211_hw *hw)
4482 {
4483 struct il_priv *il = hw->priv;
4484 int ret;
4485
4486 D_MAC80211("enter\n");
4487
4488 ret = (il->ibss_manager == IL_IBSS_MANAGER);
4489
4490 D_MAC80211("leave ret %d\n", ret);
4491 return ret;
4492 }
4493 EXPORT_SYMBOL_GPL(il_mac_tx_last_beacon);
4494
4495 static int
4496 il_set_mode(struct il_priv *il)
4497 {
4498 il_connection_init_rx_config(il);
4499
4500 if (il->ops->set_rxon_chain)
4501 il->ops->set_rxon_chain(il);
4502
4503 return il_commit_rxon(il);
4504 }
4505
4506 int
4507 il_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4508 {
4509 struct il_priv *il = hw->priv;
4510 int err;
4511 bool reset;
4512
4513 mutex_lock(&il->mutex);
4514 D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
4515
4516 if (!il_is_ready_rf(il)) {
4517 IL_WARN("Try to add interface when device not ready\n");
4518 err = -EINVAL;
4519 goto out;
4520 }
4521
4522 /*
4523 * We do not support multiple virtual interfaces, but on hardware reset
4524 * we have to add the same interface again.
4525 */
4526 reset = (il->vif == vif);
4527 if (il->vif && !reset) {
4528 err = -EOPNOTSUPP;
4529 goto out;
4530 }
4531
4532 il->vif = vif;
4533 il->iw_mode = vif->type;
4534
4535 err = il_set_mode(il);
4536 if (err) {
4537 IL_WARN("Fail to set mode %d\n", vif->type);
4538 if (!reset) {
4539 il->vif = NULL;
4540 il->iw_mode = NL80211_IFTYPE_STATION;
4541 }
4542 }
4543
4544 out:
4545 D_MAC80211("leave err %d\n", err);
4546 mutex_unlock(&il->mutex);
4547
4548 return err;
4549 }
4550 EXPORT_SYMBOL(il_mac_add_interface);
4551
4552 static void
4553 il_teardown_interface(struct il_priv *il, struct ieee80211_vif *vif,
4554 bool mode_change)
4555 {
4556 lockdep_assert_held(&il->mutex);
4557
4558 if (il->scan_vif == vif) {
4559 il_scan_cancel_timeout(il, 200);
4560 il_force_scan_end(il);
4561 }
4562
4563 if (!mode_change)
4564 il_set_mode(il);
4565
4566 }
4567
4568 void
4569 il_mac_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4570 {
4571 struct il_priv *il = hw->priv;
4572
4573 mutex_lock(&il->mutex);
4574 D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
4575
4576 WARN_ON(il->vif != vif);
4577 il->vif = NULL;
4578
4579 il_teardown_interface(il, vif, false);
4580 memset(il->bssid, 0, ETH_ALEN);
4581
4582 D_MAC80211("leave\n");
4583 mutex_unlock(&il->mutex);
4584 }
4585 EXPORT_SYMBOL(il_mac_remove_interface);
4586
4587 int
4588 il_alloc_txq_mem(struct il_priv *il)
4589 {
4590 if (!il->txq)
4591 il->txq =
4592 kzalloc(sizeof(struct il_tx_queue) *
4593 il->cfg->num_of_queues, GFP_KERNEL);
4594 if (!il->txq) {
4595 IL_ERR("Not enough memory for txq\n");
4596 return -ENOMEM;
4597 }
4598 return 0;
4599 }
4600 EXPORT_SYMBOL(il_alloc_txq_mem);
4601
4602 void
4603 il_free_txq_mem(struct il_priv *il)
4604 {
4605 kfree(il->txq);
4606 il->txq = NULL;
4607 }
4608 EXPORT_SYMBOL(il_free_txq_mem);
4609
4610 int
4611 il_force_reset(struct il_priv *il, bool external)
4612 {
4613 struct il_force_reset *force_reset;
4614
4615 if (test_bit(S_EXIT_PENDING, &il->status))
4616 return -EINVAL;
4617
4618 force_reset = &il->force_reset;
4619 force_reset->reset_request_count++;
4620 if (!external) {
4621 if (force_reset->last_force_reset_jiffies &&
4622 time_after(force_reset->last_force_reset_jiffies +
4623 force_reset->reset_duration, jiffies)) {
4624 D_INFO("force reset rejected\n");
4625 force_reset->reset_reject_count++;
4626 return -EAGAIN;
4627 }
4628 }
4629 force_reset->reset_success_count++;
4630 force_reset->last_force_reset_jiffies = jiffies;
4631
4632 /*
4633 * if the request is from external(ex: debugfs),
4634 * then always perform the request in regardless the module
4635 * parameter setting
4636 * if the request is from internal (uCode error or driver
4637 * detect failure), then fw_restart module parameter
4638 * need to be check before performing firmware reload
4639 */
4640
4641 if (!external && !il->cfg->mod_params->restart_fw) {
4642 D_INFO("Cancel firmware reload based on "
4643 "module parameter setting\n");
4644 return 0;
4645 }
4646
4647 IL_ERR("On demand firmware reload\n");
4648
4649 /* Set the FW error flag -- cleared on il_down */
4650 set_bit(S_FW_ERROR, &il->status);
4651 wake_up(&il->wait_command_queue);
4652 /*
4653 * Keep the restart process from trying to send host
4654 * commands by clearing the INIT status bit
4655 */
4656 clear_bit(S_READY, &il->status);
4657 queue_work(il->workqueue, &il->restart);
4658
4659 return 0;
4660 }
4661
4662 int
4663 il_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4664 enum nl80211_iftype newtype, bool newp2p)
4665 {
4666 struct il_priv *il = hw->priv;
4667 int err;
4668
4669 mutex_lock(&il->mutex);
4670 D_MAC80211("enter: type %d, addr %pM newtype %d newp2p %d\n",
4671 vif->type, vif->addr, newtype, newp2p);
4672
4673 if (newp2p) {
4674 err = -EOPNOTSUPP;
4675 goto out;
4676 }
4677
4678 if (!il->vif || !il_is_ready_rf(il)) {
4679 /*
4680 * Huh? But wait ... this can maybe happen when
4681 * we're in the middle of a firmware restart!
4682 */
4683 err = -EBUSY;
4684 goto out;
4685 }
4686
4687 /* success */
4688 il_teardown_interface(il, vif, true);
4689 vif->type = newtype;
4690 vif->p2p = false;
4691 err = il_set_mode(il);
4692 WARN_ON(err);
4693 /*
4694 * We've switched internally, but submitting to the
4695 * device may have failed for some reason. Mask this
4696 * error, because otherwise mac80211 will not switch
4697 * (and set the interface type back) and we'll be
4698 * out of sync with it.
4699 */
4700 err = 0;
4701
4702 out:
4703 D_MAC80211("leave err %d\n", err);
4704 mutex_unlock(&il->mutex);
4705
4706 return err;
4707 }
4708 EXPORT_SYMBOL(il_mac_change_interface);
4709
4710 /*
4711 * On every watchdog tick we check (latest) time stamp. If it does not
4712 * change during timeout period and queue is not empty we reset firmware.
4713 */
4714 static int
4715 il_check_stuck_queue(struct il_priv *il, int cnt)
4716 {
4717 struct il_tx_queue *txq = &il->txq[cnt];
4718 struct il_queue *q = &txq->q;
4719 unsigned long timeout;
4720 unsigned long now = jiffies;
4721 int ret;
4722
4723 if (q->read_ptr == q->write_ptr) {
4724 txq->time_stamp = now;
4725 return 0;
4726 }
4727
4728 timeout =
4729 txq->time_stamp +
4730 msecs_to_jiffies(il->cfg->wd_timeout);
4731
4732 if (time_after(now, timeout)) {
4733 IL_ERR("Queue %d stuck for %u ms.\n", q->id,
4734 jiffies_to_msecs(now - txq->time_stamp));
4735 ret = il_force_reset(il, false);
4736 return (ret == -EAGAIN) ? 0 : 1;
4737 }
4738
4739 return 0;
4740 }
4741
4742 /*
4743 * Making watchdog tick be a quarter of timeout assure we will
4744 * discover the queue hung between timeout and 1.25*timeout
4745 */
4746 #define IL_WD_TICK(timeout) ((timeout) / 4)
4747
4748 /*
4749 * Watchdog timer callback, we check each tx queue for stuck, if if hung
4750 * we reset the firmware. If everything is fine just rearm the timer.
4751 */
4752 void
4753 il_bg_watchdog(unsigned long data)
4754 {
4755 struct il_priv *il = (struct il_priv *)data;
4756 int cnt;
4757 unsigned long timeout;
4758
4759 if (test_bit(S_EXIT_PENDING, &il->status))
4760 return;
4761
4762 timeout = il->cfg->wd_timeout;
4763 if (timeout == 0)
4764 return;
4765
4766 /* monitor and check for stuck cmd queue */
4767 if (il_check_stuck_queue(il, il->cmd_queue))
4768 return;
4769
4770 /* monitor and check for other stuck queues */
4771 for (cnt = 0; cnt < il->hw_params.max_txq_num; cnt++) {
4772 /* skip as we already checked the command queue */
4773 if (cnt == il->cmd_queue)
4774 continue;
4775 if (il_check_stuck_queue(il, cnt))
4776 return;
4777 }
4778
4779 mod_timer(&il->watchdog,
4780 jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
4781 }
4782 EXPORT_SYMBOL(il_bg_watchdog);
4783
4784 void
4785 il_setup_watchdog(struct il_priv *il)
4786 {
4787 unsigned int timeout = il->cfg->wd_timeout;
4788
4789 if (timeout)
4790 mod_timer(&il->watchdog,
4791 jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
4792 else
4793 del_timer(&il->watchdog);
4794 }
4795 EXPORT_SYMBOL(il_setup_watchdog);
4796
4797 /*
4798 * extended beacon time format
4799 * time in usec will be changed into a 32-bit value in extended:internal format
4800 * the extended part is the beacon counts
4801 * the internal part is the time in usec within one beacon interval
4802 */
4803 u32
4804 il_usecs_to_beacons(struct il_priv *il, u32 usec, u32 beacon_interval)
4805 {
4806 u32 quot;
4807 u32 rem;
4808 u32 interval = beacon_interval * TIME_UNIT;
4809
4810 if (!interval || !usec)
4811 return 0;
4812
4813 quot =
4814 (usec /
4815 interval) & (il_beacon_time_mask_high(il,
4816 il->hw_params.
4817 beacon_time_tsf_bits) >> il->
4818 hw_params.beacon_time_tsf_bits);
4819 rem =
4820 (usec % interval) & il_beacon_time_mask_low(il,
4821 il->hw_params.
4822 beacon_time_tsf_bits);
4823
4824 return (quot << il->hw_params.beacon_time_tsf_bits) + rem;
4825 }
4826 EXPORT_SYMBOL(il_usecs_to_beacons);
4827
4828 /* base is usually what we get from ucode with each received frame,
4829 * the same as HW timer counter counting down
4830 */
4831 __le32
4832 il_add_beacon_time(struct il_priv *il, u32 base, u32 addon,
4833 u32 beacon_interval)
4834 {
4835 u32 base_low = base & il_beacon_time_mask_low(il,
4836 il->hw_params.
4837 beacon_time_tsf_bits);
4838 u32 addon_low = addon & il_beacon_time_mask_low(il,
4839 il->hw_params.
4840 beacon_time_tsf_bits);
4841 u32 interval = beacon_interval * TIME_UNIT;
4842 u32 res = (base & il_beacon_time_mask_high(il,
4843 il->hw_params.
4844 beacon_time_tsf_bits)) +
4845 (addon & il_beacon_time_mask_high(il,
4846 il->hw_params.
4847 beacon_time_tsf_bits));
4848
4849 if (base_low > addon_low)
4850 res += base_low - addon_low;
4851 else if (base_low < addon_low) {
4852 res += interval + base_low - addon_low;
4853 res += (1 << il->hw_params.beacon_time_tsf_bits);
4854 } else
4855 res += (1 << il->hw_params.beacon_time_tsf_bits);
4856
4857 return cpu_to_le32(res);
4858 }
4859 EXPORT_SYMBOL(il_add_beacon_time);
4860
4861 #ifdef CONFIG_PM
4862
4863 int
4864 il_pci_suspend(struct device *device)
4865 {
4866 struct pci_dev *pdev = to_pci_dev(device);
4867 struct il_priv *il = pci_get_drvdata(pdev);
4868
4869 /*
4870 * This function is called when system goes into suspend state
4871 * mac80211 will call il_mac_stop() from the mac80211 suspend function
4872 * first but since il_mac_stop() has no knowledge of who the caller is,
4873 * it will not call apm_ops.stop() to stop the DMA operation.
4874 * Calling apm_ops.stop here to make sure we stop the DMA.
4875 */
4876 il_apm_stop(il);
4877
4878 return 0;
4879 }
4880 EXPORT_SYMBOL(il_pci_suspend);
4881
4882 int
4883 il_pci_resume(struct device *device)
4884 {
4885 struct pci_dev *pdev = to_pci_dev(device);
4886 struct il_priv *il = pci_get_drvdata(pdev);
4887 bool hw_rfkill = false;
4888
4889 /*
4890 * We disable the RETRY_TIMEOUT register (0x41) to keep
4891 * PCI Tx retries from interfering with C3 CPU state.
4892 */
4893 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
4894
4895 il_enable_interrupts(il);
4896
4897 if (!(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4898 hw_rfkill = true;
4899
4900 if (hw_rfkill)
4901 set_bit(S_RFKILL, &il->status);
4902 else
4903 clear_bit(S_RFKILL, &il->status);
4904
4905 wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rfkill);
4906
4907 return 0;
4908 }
4909 EXPORT_SYMBOL(il_pci_resume);
4910
4911 const struct dev_pm_ops il_pm_ops = {
4912 .suspend = il_pci_suspend,
4913 .resume = il_pci_resume,
4914 .freeze = il_pci_suspend,
4915 .thaw = il_pci_resume,
4916 .poweroff = il_pci_suspend,
4917 .restore = il_pci_resume,
4918 };
4919 EXPORT_SYMBOL(il_pm_ops);
4920
4921 #endif /* CONFIG_PM */
4922
4923 static void
4924 il_update_qos(struct il_priv *il)
4925 {
4926 if (test_bit(S_EXIT_PENDING, &il->status))
4927 return;
4928
4929 il->qos_data.def_qos_parm.qos_flags = 0;
4930
4931 if (il->qos_data.qos_active)
4932 il->qos_data.def_qos_parm.qos_flags |=
4933 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
4934
4935 if (il->ht.enabled)
4936 il->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
4937
4938 D_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
4939 il->qos_data.qos_active, il->qos_data.def_qos_parm.qos_flags);
4940
4941 il_send_cmd_pdu_async(il, C_QOS_PARAM, sizeof(struct il_qosparam_cmd),
4942 &il->qos_data.def_qos_parm, NULL);
4943 }
4944
4945 /**
4946 * il_mac_config - mac80211 config callback
4947 */
4948 int
4949 il_mac_config(struct ieee80211_hw *hw, u32 changed)
4950 {
4951 struct il_priv *il = hw->priv;
4952 const struct il_channel_info *ch_info;
4953 struct ieee80211_conf *conf = &hw->conf;
4954 struct ieee80211_channel *channel = conf->channel;
4955 struct il_ht_config *ht_conf = &il->current_ht_config;
4956 unsigned long flags = 0;
4957 int ret = 0;
4958 u16 ch;
4959 int scan_active = 0;
4960 bool ht_changed = false;
4961
4962 mutex_lock(&il->mutex);
4963 D_MAC80211("enter: channel %d changed 0x%X\n", channel->hw_value,
4964 changed);
4965
4966 if (unlikely(test_bit(S_SCANNING, &il->status))) {
4967 scan_active = 1;
4968 D_MAC80211("scan active\n");
4969 }
4970
4971 if (changed &
4972 (IEEE80211_CONF_CHANGE_SMPS | IEEE80211_CONF_CHANGE_CHANNEL)) {
4973 /* mac80211 uses static for non-HT which is what we want */
4974 il->current_ht_config.smps = conf->smps_mode;
4975
4976 /*
4977 * Recalculate chain counts.
4978 *
4979 * If monitor mode is enabled then mac80211 will
4980 * set up the SM PS mode to OFF if an HT channel is
4981 * configured.
4982 */
4983 if (il->ops->set_rxon_chain)
4984 il->ops->set_rxon_chain(il);
4985 }
4986
4987 /* during scanning mac80211 will delay channel setting until
4988 * scan finish with changed = 0
4989 */
4990 if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
4991
4992 if (scan_active)
4993 goto set_ch_out;
4994
4995 ch = channel->hw_value;
4996 ch_info = il_get_channel_info(il, channel->band, ch);
4997 if (!il_is_channel_valid(ch_info)) {
4998 D_MAC80211("leave - invalid channel\n");
4999 ret = -EINVAL;
5000 goto set_ch_out;
5001 }
5002
5003 if (il->iw_mode == NL80211_IFTYPE_ADHOC &&
5004 !il_is_channel_ibss(ch_info)) {
5005 D_MAC80211("leave - not IBSS channel\n");
5006 ret = -EINVAL;
5007 goto set_ch_out;
5008 }
5009
5010 spin_lock_irqsave(&il->lock, flags);
5011
5012 /* Configure HT40 channels */
5013 if (il->ht.enabled != conf_is_ht(conf)) {
5014 il->ht.enabled = conf_is_ht(conf);
5015 ht_changed = true;
5016 }
5017 if (il->ht.enabled) {
5018 if (conf_is_ht40_minus(conf)) {
5019 il->ht.extension_chan_offset =
5020 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
5021 il->ht.is_40mhz = true;
5022 } else if (conf_is_ht40_plus(conf)) {
5023 il->ht.extension_chan_offset =
5024 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
5025 il->ht.is_40mhz = true;
5026 } else {
5027 il->ht.extension_chan_offset =
5028 IEEE80211_HT_PARAM_CHA_SEC_NONE;
5029 il->ht.is_40mhz = false;
5030 }
5031 } else
5032 il->ht.is_40mhz = false;
5033
5034 /*
5035 * Default to no protection. Protection mode will
5036 * later be set from BSS config in il_ht_conf
5037 */
5038 il->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
5039
5040 /* if we are switching from ht to 2.4 clear flags
5041 * from any ht related info since 2.4 does not
5042 * support ht */
5043 if ((le16_to_cpu(il->staging.channel) != ch))
5044 il->staging.flags = 0;
5045
5046 il_set_rxon_channel(il, channel);
5047 il_set_rxon_ht(il, ht_conf);
5048
5049 il_set_flags_for_band(il, channel->band, il->vif);
5050
5051 spin_unlock_irqrestore(&il->lock, flags);
5052
5053 if (il->ops->update_bcast_stations)
5054 ret = il->ops->update_bcast_stations(il);
5055
5056 set_ch_out:
5057 /* The list of supported rates and rate mask can be different
5058 * for each band; since the band may have changed, reset
5059 * the rate mask to what mac80211 lists */
5060 il_set_rate(il);
5061 }
5062
5063 if (changed & (IEEE80211_CONF_CHANGE_PS | IEEE80211_CONF_CHANGE_IDLE)) {
5064 ret = il_power_update_mode(il, false);
5065 if (ret)
5066 D_MAC80211("Error setting sleep level\n");
5067 }
5068
5069 if (changed & IEEE80211_CONF_CHANGE_POWER) {
5070 D_MAC80211("TX Power old=%d new=%d\n", il->tx_power_user_lmt,
5071 conf->power_level);
5072
5073 il_set_tx_power(il, conf->power_level, false);
5074 }
5075
5076 if (!il_is_ready(il)) {
5077 D_MAC80211("leave - not ready\n");
5078 goto out;
5079 }
5080
5081 if (scan_active)
5082 goto out;
5083
5084 if (memcmp(&il->active, &il->staging, sizeof(il->staging)))
5085 il_commit_rxon(il);
5086 else
5087 D_INFO("Not re-sending same RXON configuration.\n");
5088 if (ht_changed)
5089 il_update_qos(il);
5090
5091 out:
5092 D_MAC80211("leave ret %d\n", ret);
5093 mutex_unlock(&il->mutex);
5094
5095 return ret;
5096 }
5097 EXPORT_SYMBOL(il_mac_config);
5098
5099 void
5100 il_mac_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5101 {
5102 struct il_priv *il = hw->priv;
5103 unsigned long flags;
5104
5105 mutex_lock(&il->mutex);
5106 D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
5107
5108 spin_lock_irqsave(&il->lock, flags);
5109
5110 memset(&il->current_ht_config, 0, sizeof(struct il_ht_config));
5111
5112 /* new association get rid of ibss beacon skb */
5113 if (il->beacon_skb)
5114 dev_kfree_skb(il->beacon_skb);
5115 il->beacon_skb = NULL;
5116 il->timestamp = 0;
5117
5118 spin_unlock_irqrestore(&il->lock, flags);
5119
5120 il_scan_cancel_timeout(il, 100);
5121 if (!il_is_ready_rf(il)) {
5122 D_MAC80211("leave - not ready\n");
5123 mutex_unlock(&il->mutex);
5124 return;
5125 }
5126
5127 /* we are restarting association process */
5128 il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5129 il_commit_rxon(il);
5130
5131 il_set_rate(il);
5132
5133 D_MAC80211("leave\n");
5134 mutex_unlock(&il->mutex);
5135 }
5136 EXPORT_SYMBOL(il_mac_reset_tsf);
5137
5138 static void
5139 il_ht_conf(struct il_priv *il, struct ieee80211_vif *vif)
5140 {
5141 struct il_ht_config *ht_conf = &il->current_ht_config;
5142 struct ieee80211_sta *sta;
5143 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
5144
5145 D_ASSOC("enter:\n");
5146
5147 if (!il->ht.enabled)
5148 return;
5149
5150 il->ht.protection =
5151 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
5152 il->ht.non_gf_sta_present =
5153 !!(bss_conf->
5154 ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
5155
5156 ht_conf->single_chain_sufficient = false;
5157
5158 switch (vif->type) {
5159 case NL80211_IFTYPE_STATION:
5160 rcu_read_lock();
5161 sta = ieee80211_find_sta(vif, bss_conf->bssid);
5162 if (sta) {
5163 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
5164 int maxstreams;
5165
5166 maxstreams =
5167 (ht_cap->mcs.
5168 tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
5169 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
5170 maxstreams += 1;
5171
5172 if (ht_cap->mcs.rx_mask[1] == 0 &&
5173 ht_cap->mcs.rx_mask[2] == 0)
5174 ht_conf->single_chain_sufficient = true;
5175 if (maxstreams <= 1)
5176 ht_conf->single_chain_sufficient = true;
5177 } else {
5178 /*
5179 * If at all, this can only happen through a race
5180 * when the AP disconnects us while we're still
5181 * setting up the connection, in that case mac80211
5182 * will soon tell us about that.
5183 */
5184 ht_conf->single_chain_sufficient = true;
5185 }
5186 rcu_read_unlock();
5187 break;
5188 case NL80211_IFTYPE_ADHOC:
5189 ht_conf->single_chain_sufficient = true;
5190 break;
5191 default:
5192 break;
5193 }
5194
5195 D_ASSOC("leave\n");
5196 }
5197
5198 static inline void
5199 il_set_no_assoc(struct il_priv *il, struct ieee80211_vif *vif)
5200 {
5201 /*
5202 * inform the ucode that there is no longer an
5203 * association and that no more packets should be
5204 * sent
5205 */
5206 il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5207 il->staging.assoc_id = 0;
5208 il_commit_rxon(il);
5209 }
5210
5211 static void
5212 il_beacon_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5213 {
5214 struct il_priv *il = hw->priv;
5215 unsigned long flags;
5216 __le64 timestamp;
5217 struct sk_buff *skb = ieee80211_beacon_get(hw, vif);
5218
5219 if (!skb)
5220 return;
5221
5222 D_MAC80211("enter\n");
5223
5224 lockdep_assert_held(&il->mutex);
5225
5226 if (!il->beacon_enabled) {
5227 IL_ERR("update beacon with no beaconing enabled\n");
5228 dev_kfree_skb(skb);
5229 return;
5230 }
5231
5232 spin_lock_irqsave(&il->lock, flags);
5233
5234 if (il->beacon_skb)
5235 dev_kfree_skb(il->beacon_skb);
5236
5237 il->beacon_skb = skb;
5238
5239 timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
5240 il->timestamp = le64_to_cpu(timestamp);
5241
5242 D_MAC80211("leave\n");
5243 spin_unlock_irqrestore(&il->lock, flags);
5244
5245 if (!il_is_ready_rf(il)) {
5246 D_MAC80211("leave - RF not ready\n");
5247 return;
5248 }
5249
5250 il->ops->post_associate(il);
5251 }
5252
5253 void
5254 il_mac_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5255 struct ieee80211_bss_conf *bss_conf, u32 changes)
5256 {
5257 struct il_priv *il = hw->priv;
5258 int ret;
5259
5260 mutex_lock(&il->mutex);
5261 D_MAC80211("enter: changes 0x%x\n", changes);
5262
5263 if (!il_is_alive(il)) {
5264 D_MAC80211("leave - not alive\n");
5265 mutex_unlock(&il->mutex);
5266 return;
5267 }
5268
5269 if (changes & BSS_CHANGED_QOS) {
5270 unsigned long flags;
5271
5272 spin_lock_irqsave(&il->lock, flags);
5273 il->qos_data.qos_active = bss_conf->qos;
5274 il_update_qos(il);
5275 spin_unlock_irqrestore(&il->lock, flags);
5276 }
5277
5278 if (changes & BSS_CHANGED_BEACON_ENABLED) {
5279 /* FIXME: can we remove beacon_enabled ? */
5280 if (vif->bss_conf.enable_beacon)
5281 il->beacon_enabled = true;
5282 else
5283 il->beacon_enabled = false;
5284 }
5285
5286 if (changes & BSS_CHANGED_BSSID) {
5287 D_MAC80211("BSSID %pM\n", bss_conf->bssid);
5288
5289 /*
5290 * If there is currently a HW scan going on in the background,
5291 * then we need to cancel it, otherwise sometimes we are not
5292 * able to authenticate (FIXME: why ?)
5293 */
5294 if (il_scan_cancel_timeout(il, 100)) {
5295 D_MAC80211("leave - scan abort failed\n");
5296 mutex_unlock(&il->mutex);
5297 return;
5298 }
5299
5300 /* mac80211 only sets assoc when in STATION mode */
5301 memcpy(il->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
5302
5303 /* FIXME: currently needed in a few places */
5304 memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5305 }
5306
5307 /*
5308 * This needs to be after setting the BSSID in case
5309 * mac80211 decides to do both changes at once because
5310 * it will invoke post_associate.
5311 */
5312 if (vif->type == NL80211_IFTYPE_ADHOC && (changes & BSS_CHANGED_BEACON))
5313 il_beacon_update(hw, vif);
5314
5315 if (changes & BSS_CHANGED_ERP_PREAMBLE) {
5316 D_MAC80211("ERP_PREAMBLE %d\n", bss_conf->use_short_preamble);
5317 if (bss_conf->use_short_preamble)
5318 il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5319 else
5320 il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5321 }
5322
5323 if (changes & BSS_CHANGED_ERP_CTS_PROT) {
5324 D_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
5325 if (bss_conf->use_cts_prot && il->band != IEEE80211_BAND_5GHZ)
5326 il->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
5327 else
5328 il->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
5329 if (bss_conf->use_cts_prot)
5330 il->staging.flags |= RXON_FLG_SELF_CTS_EN;
5331 else
5332 il->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
5333 }
5334
5335 if (changes & BSS_CHANGED_BASIC_RATES) {
5336 /* XXX use this information
5337 *
5338 * To do that, remove code from il_set_rate() and put something
5339 * like this here:
5340 *
5341 if (A-band)
5342 il->staging.ofdm_basic_rates =
5343 bss_conf->basic_rates;
5344 else
5345 il->staging.ofdm_basic_rates =
5346 bss_conf->basic_rates >> 4;
5347 il->staging.cck_basic_rates =
5348 bss_conf->basic_rates & 0xF;
5349 */
5350 }
5351
5352 if (changes & BSS_CHANGED_HT) {
5353 il_ht_conf(il, vif);
5354
5355 if (il->ops->set_rxon_chain)
5356 il->ops->set_rxon_chain(il);
5357 }
5358
5359 if (changes & BSS_CHANGED_ASSOC) {
5360 D_MAC80211("ASSOC %d\n", bss_conf->assoc);
5361 if (bss_conf->assoc) {
5362 il->timestamp = bss_conf->sync_tsf;
5363
5364 if (!il_is_rfkill(il))
5365 il->ops->post_associate(il);
5366 } else
5367 il_set_no_assoc(il, vif);
5368 }
5369
5370 if (changes && il_is_associated(il) && bss_conf->aid) {
5371 D_MAC80211("Changes (%#x) while associated\n", changes);
5372 ret = il_send_rxon_assoc(il);
5373 if (!ret) {
5374 /* Sync active_rxon with latest change. */
5375 memcpy((void *)&il->active, &il->staging,
5376 sizeof(struct il_rxon_cmd));
5377 }
5378 }
5379
5380 if (changes & BSS_CHANGED_BEACON_ENABLED) {
5381 if (vif->bss_conf.enable_beacon) {
5382 memcpy(il->staging.bssid_addr, bss_conf->bssid,
5383 ETH_ALEN);
5384 memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5385 il->ops->config_ap(il);
5386 } else
5387 il_set_no_assoc(il, vif);
5388 }
5389
5390 if (changes & BSS_CHANGED_IBSS) {
5391 ret = il->ops->manage_ibss_station(il, vif,
5392 bss_conf->ibss_joined);
5393 if (ret)
5394 IL_ERR("failed to %s IBSS station %pM\n",
5395 bss_conf->ibss_joined ? "add" : "remove",
5396 bss_conf->bssid);
5397 }
5398
5399 D_MAC80211("leave\n");
5400 mutex_unlock(&il->mutex);
5401 }
5402 EXPORT_SYMBOL(il_mac_bss_info_changed);
5403
5404 irqreturn_t
5405 il_isr(int irq, void *data)
5406 {
5407 struct il_priv *il = data;
5408 u32 inta, inta_mask;
5409 u32 inta_fh;
5410 unsigned long flags;
5411 if (!il)
5412 return IRQ_NONE;
5413
5414 spin_lock_irqsave(&il->lock, flags);
5415
5416 /* Disable (but don't clear!) interrupts here to avoid
5417 * back-to-back ISRs and sporadic interrupts from our NIC.
5418 * If we have something to service, the tasklet will re-enable ints.
5419 * If we *don't* have something, we'll re-enable before leaving here. */
5420 inta_mask = _il_rd(il, CSR_INT_MASK); /* just for debug */
5421 _il_wr(il, CSR_INT_MASK, 0x00000000);
5422
5423 /* Discover which interrupts are active/pending */
5424 inta = _il_rd(il, CSR_INT);
5425 inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
5426
5427 /* Ignore interrupt if there's nothing in NIC to service.
5428 * This may be due to IRQ shared with another device,
5429 * or due to sporadic interrupts thrown from our NIC. */
5430 if (!inta && !inta_fh) {
5431 D_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
5432 goto none;
5433 }
5434
5435 if (inta == 0xFFFFFFFF || (inta & 0xFFFFFFF0) == 0xa5a5a5a0) {
5436 /* Hardware disappeared. It might have already raised
5437 * an interrupt */
5438 IL_WARN("HARDWARE GONE?? INTA == 0x%08x\n", inta);
5439 goto unplugged;
5440 }
5441
5442 D_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta, inta_mask,
5443 inta_fh);
5444
5445 inta &= ~CSR_INT_BIT_SCD;
5446
5447 /* il_irq_tasklet() will service interrupts and re-enable them */
5448 if (likely(inta || inta_fh))
5449 tasklet_schedule(&il->irq_tasklet);
5450
5451 unplugged:
5452 spin_unlock_irqrestore(&il->lock, flags);
5453 return IRQ_HANDLED;
5454
5455 none:
5456 /* re-enable interrupts here since we don't have anything to service. */
5457 /* only Re-enable if disabled by irq */
5458 if (test_bit(S_INT_ENABLED, &il->status))
5459 il_enable_interrupts(il);
5460 spin_unlock_irqrestore(&il->lock, flags);
5461 return IRQ_NONE;
5462 }
5463 EXPORT_SYMBOL(il_isr);
5464
5465 /*
5466 * il_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
5467 * function.
5468 */
5469 void
5470 il_tx_cmd_protection(struct il_priv *il, struct ieee80211_tx_info *info,
5471 __le16 fc, __le32 *tx_flags)
5472 {
5473 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
5474 *tx_flags |= TX_CMD_FLG_RTS_MSK;
5475 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
5476 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5477
5478 if (!ieee80211_is_mgmt(fc))
5479 return;
5480
5481 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
5482 case cpu_to_le16(IEEE80211_STYPE_AUTH):
5483 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
5484 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
5485 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
5486 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5487 *tx_flags |= TX_CMD_FLG_CTS_MSK;
5488 break;
5489 }
5490 } else if (info->control.rates[0].
5491 flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
5492 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5493 *tx_flags |= TX_CMD_FLG_CTS_MSK;
5494 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5495 }
5496 }
5497 EXPORT_SYMBOL(il_tx_cmd_protection);
Linux ARM platform port for MOXA ART SoC