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net/mlx4_en: Move filters cleanup to a proper location
[linux/fpc-iii.git] / drivers / net / wireless / intel / iwlegacy / common.c
blobeb24b9241bb259ce2acb6632c05c2ddccc656662
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/pci.h>
37 #include <linux/dma-mapping.h>
38 #include <linux/delay.h>
39 #include <linux/skbuff.h>
40 #include <net/mac80211.h>
41
42 #include "common.h"
43
44 int
45 _il_poll_bit(struct il_priv *il, u32 addr, u32 bits, u32 mask, int timeout)
46 {
47 const int interval = 10; /* microseconds */
48 int t = 0;
49
50 do {
51 if ((_il_rd(il, addr) & mask) == (bits & mask))
52 return t;
53 udelay(interval);
54 t += interval;
55 } while (t < timeout);
56
57 return -ETIMEDOUT;
58 }
59 EXPORT_SYMBOL(_il_poll_bit);
60
61 void
62 il_set_bit(struct il_priv *p, u32 r, u32 m)
63 {
64 unsigned long reg_flags;
65
66 spin_lock_irqsave(&p->reg_lock, reg_flags);
67 _il_set_bit(p, r, m);
68 spin_unlock_irqrestore(&p->reg_lock, reg_flags);
69 }
70 EXPORT_SYMBOL(il_set_bit);
71
72 void
73 il_clear_bit(struct il_priv *p, u32 r, u32 m)
74 {
75 unsigned long reg_flags;
76
77 spin_lock_irqsave(&p->reg_lock, reg_flags);
78 _il_clear_bit(p, r, m);
79 spin_unlock_irqrestore(&p->reg_lock, reg_flags);
80 }
81 EXPORT_SYMBOL(il_clear_bit);
82
83 bool
84 _il_grab_nic_access(struct il_priv *il)
85 {
86 int ret;
87 u32 val;
88
89 /* this bit wakes up the NIC */
90 _il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
91
92 /*
93 * These bits say the device is running, and should keep running for
94 * at least a short while (at least as long as MAC_ACCESS_REQ stays 1),
95 * but they do not indicate that embedded SRAM is restored yet;
96 * 3945 and 4965 have volatile SRAM, and must save/restore contents
97 * to/from host DRAM when sleeping/waking for power-saving.
98 * Each direction takes approximately 1/4 millisecond; with this
99 * overhead, it's a good idea to grab and hold MAC_ACCESS_REQUEST if a
100 * series of register accesses are expected (e.g. reading Event Log),
101 * to keep device from sleeping.
102 *
103 * CSR_UCODE_DRV_GP1 register bit MAC_SLEEP == 0 indicates that
104 * SRAM is okay/restored. We don't check that here because this call
105 * is just for hardware register access; but GP1 MAC_SLEEP check is a
106 * good idea before accessing 3945/4965 SRAM (e.g. reading Event Log).
107 *
108 */
109 ret =
110 _il_poll_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN,
111 (CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
112 CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 15000);
113 if (unlikely(ret < 0)) {
114 val = _il_rd(il, CSR_GP_CNTRL);
115 WARN_ONCE(1, "Timeout waiting for ucode processor access "
116 "(CSR_GP_CNTRL 0x%08x)\n", val);
117 _il_wr(il, CSR_RESET, CSR_RESET_REG_FLAG_FORCE_NMI);
118 return false;
119 }
120
121 return true;
122 }
123 EXPORT_SYMBOL_GPL(_il_grab_nic_access);
124
125 int
126 il_poll_bit(struct il_priv *il, u32 addr, u32 mask, int timeout)
127 {
128 const int interval = 10; /* microseconds */
129 int t = 0;
130
131 do {
132 if ((il_rd(il, addr) & mask) == mask)
133 return t;
134 udelay(interval);
135 t += interval;
136 } while (t < timeout);
137
138 return -ETIMEDOUT;
139 }
140 EXPORT_SYMBOL(il_poll_bit);
141
142 u32
143 il_rd_prph(struct il_priv *il, u32 reg)
144 {
145 unsigned long reg_flags;
146 u32 val;
147
148 spin_lock_irqsave(&il->reg_lock, reg_flags);
149 _il_grab_nic_access(il);
150 val = _il_rd_prph(il, reg);
151 _il_release_nic_access(il);
152 spin_unlock_irqrestore(&il->reg_lock, reg_flags);
153 return val;
154 }
155 EXPORT_SYMBOL(il_rd_prph);
156
157 void
158 il_wr_prph(struct il_priv *il, u32 addr, u32 val)
159 {
160 unsigned long reg_flags;
161
162 spin_lock_irqsave(&il->reg_lock, reg_flags);
163 if (likely(_il_grab_nic_access(il))) {
164 _il_wr_prph(il, addr, val);
165 _il_release_nic_access(il);
166 }
167 spin_unlock_irqrestore(&il->reg_lock, reg_flags);
168 }
169 EXPORT_SYMBOL(il_wr_prph);
170
171 u32
172 il_read_targ_mem(struct il_priv *il, u32 addr)
173 {
174 unsigned long reg_flags;
175 u32 value;
176
177 spin_lock_irqsave(&il->reg_lock, reg_flags);
178 _il_grab_nic_access(il);
179
180 _il_wr(il, HBUS_TARG_MEM_RADDR, addr);
181 value = _il_rd(il, HBUS_TARG_MEM_RDAT);
182
183 _il_release_nic_access(il);
184 spin_unlock_irqrestore(&il->reg_lock, reg_flags);
185 return value;
186 }
187 EXPORT_SYMBOL(il_read_targ_mem);
188
189 void
190 il_write_targ_mem(struct il_priv *il, u32 addr, u32 val)
191 {
192 unsigned long reg_flags;
193
194 spin_lock_irqsave(&il->reg_lock, reg_flags);
195 if (likely(_il_grab_nic_access(il))) {
196 _il_wr(il, HBUS_TARG_MEM_WADDR, addr);
197 _il_wr(il, HBUS_TARG_MEM_WDAT, val);
198 _il_release_nic_access(il);
199 }
200 spin_unlock_irqrestore(&il->reg_lock, reg_flags);
201 }
202 EXPORT_SYMBOL(il_write_targ_mem);
203
204 const char *
205 il_get_cmd_string(u8 cmd)
206 {
207 switch (cmd) {
208 IL_CMD(N_ALIVE);
209 IL_CMD(N_ERROR);
210 IL_CMD(C_RXON);
211 IL_CMD(C_RXON_ASSOC);
212 IL_CMD(C_QOS_PARAM);
213 IL_CMD(C_RXON_TIMING);
214 IL_CMD(C_ADD_STA);
215 IL_CMD(C_REM_STA);
216 IL_CMD(C_WEPKEY);
217 IL_CMD(N_3945_RX);
218 IL_CMD(C_TX);
219 IL_CMD(C_RATE_SCALE);
220 IL_CMD(C_LEDS);
221 IL_CMD(C_TX_LINK_QUALITY_CMD);
222 IL_CMD(C_CHANNEL_SWITCH);
223 IL_CMD(N_CHANNEL_SWITCH);
224 IL_CMD(C_SPECTRUM_MEASUREMENT);
225 IL_CMD(N_SPECTRUM_MEASUREMENT);
226 IL_CMD(C_POWER_TBL);
227 IL_CMD(N_PM_SLEEP);
228 IL_CMD(N_PM_DEBUG_STATS);
229 IL_CMD(C_SCAN);
230 IL_CMD(C_SCAN_ABORT);
231 IL_CMD(N_SCAN_START);
232 IL_CMD(N_SCAN_RESULTS);
233 IL_CMD(N_SCAN_COMPLETE);
234 IL_CMD(N_BEACON);
235 IL_CMD(C_TX_BEACON);
236 IL_CMD(C_TX_PWR_TBL);
237 IL_CMD(C_BT_CONFIG);
238 IL_CMD(C_STATS);
239 IL_CMD(N_STATS);
240 IL_CMD(N_CARD_STATE);
241 IL_CMD(N_MISSED_BEACONS);
242 IL_CMD(C_CT_KILL_CONFIG);
243 IL_CMD(C_SENSITIVITY);
244 IL_CMD(C_PHY_CALIBRATION);
245 IL_CMD(N_RX_PHY);
246 IL_CMD(N_RX_MPDU);
247 IL_CMD(N_RX);
248 IL_CMD(N_COMPRESSED_BA);
249 default:
250 return "UNKNOWN";
251
252 }
253 }
254 EXPORT_SYMBOL(il_get_cmd_string);
255
256 #define HOST_COMPLETE_TIMEOUT (HZ / 2)
257
258 static void
259 il_generic_cmd_callback(struct il_priv *il, struct il_device_cmd *cmd,
260 struct il_rx_pkt *pkt)
261 {
262 if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
263 IL_ERR("Bad return from %s (0x%08X)\n",
264 il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
265 return;
266 }
267 #ifdef CONFIG_IWLEGACY_DEBUG
268 switch (cmd->hdr.cmd) {
269 case C_TX_LINK_QUALITY_CMD:
270 case C_SENSITIVITY:
271 D_HC_DUMP("back from %s (0x%08X)\n",
272 il_get_cmd_string(cmd->hdr.cmd), pkt->hdr.flags);
273 break;
274 default:
275 D_HC("back from %s (0x%08X)\n", il_get_cmd_string(cmd->hdr.cmd),
276 pkt->hdr.flags);
277 }
278 #endif
279 }
280
281 static int
282 il_send_cmd_async(struct il_priv *il, struct il_host_cmd *cmd)
283 {
284 int ret;
285
286 BUG_ON(!(cmd->flags & CMD_ASYNC));
287
288 /* An asynchronous command can not expect an SKB to be set. */
289 BUG_ON(cmd->flags & CMD_WANT_SKB);
290
291 /* Assign a generic callback if one is not provided */
292 if (!cmd->callback)
293 cmd->callback = il_generic_cmd_callback;
294
295 if (test_bit(S_EXIT_PENDING, &il->status))
296 return -EBUSY;
297
298 ret = il_enqueue_hcmd(il, cmd);
299 if (ret < 0) {
300 IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n",
301 il_get_cmd_string(cmd->id), ret);
302 return ret;
303 }
304 return 0;
305 }
306
307 int
308 il_send_cmd_sync(struct il_priv *il, struct il_host_cmd *cmd)
309 {
310 int cmd_idx;
311 int ret;
312
313 lockdep_assert_held(&il->mutex);
314
315 BUG_ON(cmd->flags & CMD_ASYNC);
316
317 /* A synchronous command can not have a callback set. */
318 BUG_ON(cmd->callback);
319
320 D_INFO("Attempting to send sync command %s\n",
321 il_get_cmd_string(cmd->id));
322
323 set_bit(S_HCMD_ACTIVE, &il->status);
324 D_INFO("Setting HCMD_ACTIVE for command %s\n",
325 il_get_cmd_string(cmd->id));
326
327 cmd_idx = il_enqueue_hcmd(il, cmd);
328 if (cmd_idx < 0) {
329 ret = cmd_idx;
330 IL_ERR("Error sending %s: enqueue_hcmd failed: %d\n",
331 il_get_cmd_string(cmd->id), ret);
332 goto out;
333 }
334
335 ret = wait_event_timeout(il->wait_command_queue,
336 !test_bit(S_HCMD_ACTIVE, &il->status),
337 HOST_COMPLETE_TIMEOUT);
338 if (!ret) {
339 if (test_bit(S_HCMD_ACTIVE, &il->status)) {
340 IL_ERR("Error sending %s: time out after %dms.\n",
341 il_get_cmd_string(cmd->id),
342 jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
343
344 clear_bit(S_HCMD_ACTIVE, &il->status);
345 D_INFO("Clearing HCMD_ACTIVE for command %s\n",
346 il_get_cmd_string(cmd->id));
347 ret = -ETIMEDOUT;
348 goto cancel;
349 }
350 }
351
352 if (test_bit(S_RFKILL, &il->status)) {
353 IL_ERR("Command %s aborted: RF KILL Switch\n",
354 il_get_cmd_string(cmd->id));
355 ret = -ECANCELED;
356 goto fail;
357 }
358 if (test_bit(S_FW_ERROR, &il->status)) {
359 IL_ERR("Command %s failed: FW Error\n",
360 il_get_cmd_string(cmd->id));
361 ret = -EIO;
362 goto fail;
363 }
364 if ((cmd->flags & CMD_WANT_SKB) && !cmd->reply_page) {
365 IL_ERR("Error: Response NULL in '%s'\n",
366 il_get_cmd_string(cmd->id));
367 ret = -EIO;
368 goto cancel;
369 }
370
371 ret = 0;
372 goto out;
373
374 cancel:
375 if (cmd->flags & CMD_WANT_SKB) {
376 /*
377 * Cancel the CMD_WANT_SKB flag for the cmd in the
378 * TX cmd queue. Otherwise in case the cmd comes
379 * in later, it will possibly set an invalid
380 * address (cmd->meta.source).
381 */
382 il->txq[il->cmd_queue].meta[cmd_idx].flags &= ~CMD_WANT_SKB;
383 }
384 fail:
385 if (cmd->reply_page) {
386 il_free_pages(il, cmd->reply_page);
387 cmd->reply_page = 0;
388 }
389 out:
390 return ret;
391 }
392 EXPORT_SYMBOL(il_send_cmd_sync);
393
394 int
395 il_send_cmd(struct il_priv *il, struct il_host_cmd *cmd)
396 {
397 if (cmd->flags & CMD_ASYNC)
398 return il_send_cmd_async(il, cmd);
399
400 return il_send_cmd_sync(il, cmd);
401 }
402 EXPORT_SYMBOL(il_send_cmd);
403
404 int
405 il_send_cmd_pdu(struct il_priv *il, u8 id, u16 len, const void *data)
406 {
407 struct il_host_cmd cmd = {
408 .id = id,
409 .len = len,
410 .data = data,
411 };
412
413 return il_send_cmd_sync(il, &cmd);
414 }
415 EXPORT_SYMBOL(il_send_cmd_pdu);
416
417 int
418 il_send_cmd_pdu_async(struct il_priv *il, u8 id, u16 len, const void *data,
419 void (*callback) (struct il_priv *il,
420 struct il_device_cmd *cmd,
421 struct il_rx_pkt *pkt))
422 {
423 struct il_host_cmd cmd = {
424 .id = id,
425 .len = len,
426 .data = data,
427 };
428
429 cmd.flags |= CMD_ASYNC;
430 cmd.callback = callback;
431
432 return il_send_cmd_async(il, &cmd);
433 }
434 EXPORT_SYMBOL(il_send_cmd_pdu_async);
435
436 /* default: IL_LED_BLINK(0) using blinking idx table */
437 static int led_mode;
438 module_param(led_mode, int, S_IRUGO);
439 MODULE_PARM_DESC(led_mode,
440 "0=system default, " "1=On(RF On)/Off(RF Off), 2=blinking");
441
442 /* Throughput OFF time(ms) ON time (ms)
443 * >300 25 25
444 * >200 to 300 40 40
445 * >100 to 200 55 55
446 * >70 to 100 65 65
447 * >50 to 70 75 75
448 * >20 to 50 85 85
449 * >10 to 20 95 95
450 * >5 to 10 110 110
451 * >1 to 5 130 130
452 * >0 to 1 167 167
453 * <=0 SOLID ON
454 */
455 static const struct ieee80211_tpt_blink il_blink[] = {
456 {.throughput = 0, .blink_time = 334},
457 {.throughput = 1 * 1024 - 1, .blink_time = 260},
458 {.throughput = 5 * 1024 - 1, .blink_time = 220},
459 {.throughput = 10 * 1024 - 1, .blink_time = 190},
460 {.throughput = 20 * 1024 - 1, .blink_time = 170},
461 {.throughput = 50 * 1024 - 1, .blink_time = 150},
462 {.throughput = 70 * 1024 - 1, .blink_time = 130},
463 {.throughput = 100 * 1024 - 1, .blink_time = 110},
464 {.throughput = 200 * 1024 - 1, .blink_time = 80},
465 {.throughput = 300 * 1024 - 1, .blink_time = 50},
466 };
467
468 /*
469 * Adjust led blink rate to compensate on a MAC Clock difference on every HW
470 * Led blink rate analysis showed an average deviation of 0% on 3945,
471 * 5% on 4965 HW.
472 * Need to compensate on the led on/off time per HW according to the deviation
473 * to achieve the desired led frequency
474 * The calculation is: (100-averageDeviation)/100 * blinkTime
475 * For code efficiency the calculation will be:
476 * compensation = (100 - averageDeviation) * 64 / 100
477 * NewBlinkTime = (compensation * BlinkTime) / 64
478 */
479 static inline u8
480 il_blink_compensation(struct il_priv *il, u8 time, u16 compensation)
481 {
482 if (!compensation) {
483 IL_ERR("undefined blink compensation: "
484 "use pre-defined blinking time\n");
485 return time;
486 }
487
488 return (u8) ((time * compensation) >> 6);
489 }
490
491 /* Set led pattern command */
492 static int
493 il_led_cmd(struct il_priv *il, unsigned long on, unsigned long off)
494 {
495 struct il_led_cmd led_cmd = {
496 .id = IL_LED_LINK,
497 .interval = IL_DEF_LED_INTRVL
498 };
499 int ret;
500
501 if (!test_bit(S_READY, &il->status))
502 return -EBUSY;
503
504 if (il->blink_on == on && il->blink_off == off)
505 return 0;
506
507 if (off == 0) {
508 /* led is SOLID_ON */
509 on = IL_LED_SOLID;
510 }
511
512 D_LED("Led blink time compensation=%u\n",
513 il->cfg->led_compensation);
514 led_cmd.on =
515 il_blink_compensation(il, on,
516 il->cfg->led_compensation);
517 led_cmd.off =
518 il_blink_compensation(il, off,
519 il->cfg->led_compensation);
520
521 ret = il->ops->send_led_cmd(il, &led_cmd);
522 if (!ret) {
523 il->blink_on = on;
524 il->blink_off = off;
525 }
526 return ret;
527 }
528
529 static void
530 il_led_brightness_set(struct led_classdev *led_cdev,
531 enum led_brightness brightness)
532 {
533 struct il_priv *il = container_of(led_cdev, struct il_priv, led);
534 unsigned long on = 0;
535
536 if (brightness > 0)
537 on = IL_LED_SOLID;
538
539 il_led_cmd(il, on, 0);
540 }
541
542 static int
543 il_led_blink_set(struct led_classdev *led_cdev, unsigned long *delay_on,
544 unsigned long *delay_off)
545 {
546 struct il_priv *il = container_of(led_cdev, struct il_priv, led);
547
548 return il_led_cmd(il, *delay_on, *delay_off);
549 }
550
551 void
552 il_leds_init(struct il_priv *il)
553 {
554 int mode = led_mode;
555 int ret;
556
557 if (mode == IL_LED_DEFAULT)
558 mode = il->cfg->led_mode;
559
560 il->led.name =
561 kasprintf(GFP_KERNEL, "%s-led", wiphy_name(il->hw->wiphy));
562 il->led.brightness_set = il_led_brightness_set;
563 il->led.blink_set = il_led_blink_set;
564 il->led.max_brightness = 1;
565
566 switch (mode) {
567 case IL_LED_DEFAULT:
568 WARN_ON(1);
569 break;
570 case IL_LED_BLINK:
571 il->led.default_trigger =
572 ieee80211_create_tpt_led_trigger(il->hw,
573 IEEE80211_TPT_LEDTRIG_FL_CONNECTED,
574 il_blink,
575 ARRAY_SIZE(il_blink));
576 break;
577 case IL_LED_RF_STATE:
578 il->led.default_trigger = ieee80211_get_radio_led_name(il->hw);
579 break;
580 }
581
582 ret = led_classdev_register(&il->pci_dev->dev, &il->led);
583 if (ret) {
584 kfree(il->led.name);
585 return;
586 }
587
588 il->led_registered = true;
589 }
590 EXPORT_SYMBOL(il_leds_init);
591
592 void
593 il_leds_exit(struct il_priv *il)
594 {
595 if (!il->led_registered)
596 return;
597
598 led_classdev_unregister(&il->led);
599 kfree(il->led.name);
600 }
601 EXPORT_SYMBOL(il_leds_exit);
602
603 /************************** EEPROM BANDS ****************************
604 *
605 * The il_eeprom_band definitions below provide the mapping from the
606 * EEPROM contents to the specific channel number supported for each
607 * band.
608 *
609 * For example, il_priv->eeprom.band_3_channels[4] from the band_3
610 * definition below maps to physical channel 42 in the 5.2GHz spectrum.
611 * The specific geography and calibration information for that channel
612 * is contained in the eeprom map itself.
613 *
614 * During init, we copy the eeprom information and channel map
615 * information into il->channel_info_24/52 and il->channel_map_24/52
616 *
617 * channel_map_24/52 provides the idx in the channel_info array for a
618 * given channel. We have to have two separate maps as there is channel
619 * overlap with the 2.4GHz and 5.2GHz spectrum as seen in band_1 and
620 * band_2
621 *
622 * A value of 0xff stored in the channel_map indicates that the channel
623 * is not supported by the hardware at all.
624 *
625 * A value of 0xfe in the channel_map indicates that the channel is not
626 * valid for Tx with the current hardware. This means that
627 * while the system can tune and receive on a given channel, it may not
628 * be able to associate or transmit any frames on that
629 * channel. There is no corresponding channel information for that
630 * entry.
631 *
632 *********************************************************************/
633
634 /* 2.4 GHz */
635 const u8 il_eeprom_band_1[14] = {
636 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
637 };
638
639 /* 5.2 GHz bands */
640 static const u8 il_eeprom_band_2[] = { /* 4915-5080MHz */
641 183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
642 };
643
644 static const u8 il_eeprom_band_3[] = { /* 5170-5320MHz */
645 34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
646 };
647
648 static const u8 il_eeprom_band_4[] = { /* 5500-5700MHz */
649 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
650 };
651
652 static const u8 il_eeprom_band_5[] = { /* 5725-5825MHz */
653 145, 149, 153, 157, 161, 165
654 };
655
656 static const u8 il_eeprom_band_6[] = { /* 2.4 ht40 channel */
657 1, 2, 3, 4, 5, 6, 7
658 };
659
660 static const u8 il_eeprom_band_7[] = { /* 5.2 ht40 channel */
661 36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
662 };
663
664 /******************************************************************************
665 *
666 * EEPROM related functions
667 *
668 ******************************************************************************/
669
670 static int
671 il_eeprom_verify_signature(struct il_priv *il)
672 {
673 u32 gp = _il_rd(il, CSR_EEPROM_GP) & CSR_EEPROM_GP_VALID_MSK;
674 int ret = 0;
675
676 D_EEPROM("EEPROM signature=0x%08x\n", gp);
677 switch (gp) {
678 case CSR_EEPROM_GP_GOOD_SIG_EEP_LESS_THAN_4K:
679 case CSR_EEPROM_GP_GOOD_SIG_EEP_MORE_THAN_4K:
680 break;
681 default:
682 IL_ERR("bad EEPROM signature," "EEPROM_GP=0x%08x\n", gp);
683 ret = -ENOENT;
684 break;
685 }
686 return ret;
687 }
688
689 const u8 *
690 il_eeprom_query_addr(const struct il_priv *il, size_t offset)
691 {
692 BUG_ON(offset >= il->cfg->eeprom_size);
693 return &il->eeprom[offset];
694 }
695 EXPORT_SYMBOL(il_eeprom_query_addr);
696
697 u16
698 il_eeprom_query16(const struct il_priv *il, size_t offset)
699 {
700 if (!il->eeprom)
701 return 0;
702 return (u16) il->eeprom[offset] | ((u16) il->eeprom[offset + 1] << 8);
703 }
704 EXPORT_SYMBOL(il_eeprom_query16);
705
706 /**
707 * il_eeprom_init - read EEPROM contents
708 *
709 * Load the EEPROM contents from adapter into il->eeprom
710 *
711 * NOTE: This routine uses the non-debug IO access functions.
712 */
713 int
714 il_eeprom_init(struct il_priv *il)
715 {
716 __le16 *e;
717 u32 gp = _il_rd(il, CSR_EEPROM_GP);
718 int sz;
719 int ret;
720 u16 addr;
721
722 /* allocate eeprom */
723 sz = il->cfg->eeprom_size;
724 D_EEPROM("NVM size = %d\n", sz);
725 il->eeprom = kzalloc(sz, GFP_KERNEL);
726 if (!il->eeprom)
727 return -ENOMEM;
728
729 e = (__le16 *) il->eeprom;
730
731 il->ops->apm_init(il);
732
733 ret = il_eeprom_verify_signature(il);
734 if (ret < 0) {
735 IL_ERR("EEPROM not found, EEPROM_GP=0x%08x\n", gp);
736 ret = -ENOENT;
737 goto err;
738 }
739
740 /* Make sure driver (instead of uCode) is allowed to read EEPROM */
741 ret = il->ops->eeprom_acquire_semaphore(il);
742 if (ret < 0) {
743 IL_ERR("Failed to acquire EEPROM semaphore.\n");
744 ret = -ENOENT;
745 goto err;
746 }
747
748 /* eeprom is an array of 16bit values */
749 for (addr = 0; addr < sz; addr += sizeof(u16)) {
750 u32 r;
751
752 _il_wr(il, CSR_EEPROM_REG,
753 CSR_EEPROM_REG_MSK_ADDR & (addr << 1));
754
755 ret =
756 _il_poll_bit(il, CSR_EEPROM_REG,
757 CSR_EEPROM_REG_READ_VALID_MSK,
758 CSR_EEPROM_REG_READ_VALID_MSK,
759 IL_EEPROM_ACCESS_TIMEOUT);
760 if (ret < 0) {
761 IL_ERR("Time out reading EEPROM[%d]\n", addr);
762 goto done;
763 }
764 r = _il_rd(il, CSR_EEPROM_REG);
765 e[addr / 2] = cpu_to_le16(r >> 16);
766 }
767
768 D_EEPROM("NVM Type: %s, version: 0x%x\n", "EEPROM",
769 il_eeprom_query16(il, EEPROM_VERSION));
770
771 ret = 0;
772 done:
773 il->ops->eeprom_release_semaphore(il);
774
775 err:
776 if (ret)
777 il_eeprom_free(il);
778 /* Reset chip to save power until we load uCode during "up". */
779 il_apm_stop(il);
780 return ret;
781 }
782 EXPORT_SYMBOL(il_eeprom_init);
783
784 void
785 il_eeprom_free(struct il_priv *il)
786 {
787 kfree(il->eeprom);
788 il->eeprom = NULL;
789 }
790 EXPORT_SYMBOL(il_eeprom_free);
791
792 static void
793 il_init_band_reference(const struct il_priv *il, int eep_band,
794 int *eeprom_ch_count,
795 const struct il_eeprom_channel **eeprom_ch_info,
796 const u8 **eeprom_ch_idx)
797 {
798 u32 offset = il->cfg->regulatory_bands[eep_band - 1];
799
800 switch (eep_band) {
801 case 1: /* 2.4GHz band */
802 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_1);
803 *eeprom_ch_info =
804 (struct il_eeprom_channel *)il_eeprom_query_addr(il,
805 offset);
806 *eeprom_ch_idx = il_eeprom_band_1;
807 break;
808 case 2: /* 4.9GHz band */
809 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_2);
810 *eeprom_ch_info =
811 (struct il_eeprom_channel *)il_eeprom_query_addr(il,
812 offset);
813 *eeprom_ch_idx = il_eeprom_band_2;
814 break;
815 case 3: /* 5.2GHz band */
816 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_3);
817 *eeprom_ch_info =
818 (struct il_eeprom_channel *)il_eeprom_query_addr(il,
819 offset);
820 *eeprom_ch_idx = il_eeprom_band_3;
821 break;
822 case 4: /* 5.5GHz band */
823 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_4);
824 *eeprom_ch_info =
825 (struct il_eeprom_channel *)il_eeprom_query_addr(il,
826 offset);
827 *eeprom_ch_idx = il_eeprom_band_4;
828 break;
829 case 5: /* 5.7GHz band */
830 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_5);
831 *eeprom_ch_info =
832 (struct il_eeprom_channel *)il_eeprom_query_addr(il,
833 offset);
834 *eeprom_ch_idx = il_eeprom_band_5;
835 break;
836 case 6: /* 2.4GHz ht40 channels */
837 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_6);
838 *eeprom_ch_info =
839 (struct il_eeprom_channel *)il_eeprom_query_addr(il,
840 offset);
841 *eeprom_ch_idx = il_eeprom_band_6;
842 break;
843 case 7: /* 5 GHz ht40 channels */
844 *eeprom_ch_count = ARRAY_SIZE(il_eeprom_band_7);
845 *eeprom_ch_info =
846 (struct il_eeprom_channel *)il_eeprom_query_addr(il,
847 offset);
848 *eeprom_ch_idx = il_eeprom_band_7;
849 break;
850 default:
851 BUG();
852 }
853 }
854
855 #define CHECK_AND_PRINT(x) ((eeprom_ch->flags & EEPROM_CHANNEL_##x) \
856 ? # x " " : "")
857 /**
858 * il_mod_ht40_chan_info - Copy ht40 channel info into driver's il.
859 *
860 * Does not set up a command, or touch hardware.
861 */
862 static int
863 il_mod_ht40_chan_info(struct il_priv *il, enum nl80211_band band, u16 channel,
864 const struct il_eeprom_channel *eeprom_ch,
865 u8 clear_ht40_extension_channel)
866 {
867 struct il_channel_info *ch_info;
868
869 ch_info =
870 (struct il_channel_info *)il_get_channel_info(il, band, channel);
871
872 if (!il_is_channel_valid(ch_info))
873 return -1;
874
875 D_EEPROM("HT40 Ch. %d [%sGHz] %s%s%s%s%s(0x%02x %ddBm):"
876 " Ad-Hoc %ssupported\n", ch_info->channel,
877 il_is_channel_a_band(ch_info) ? "5.2" : "2.4",
878 CHECK_AND_PRINT(IBSS), CHECK_AND_PRINT(ACTIVE),
879 CHECK_AND_PRINT(RADAR), CHECK_AND_PRINT(WIDE),
880 CHECK_AND_PRINT(DFS), eeprom_ch->flags,
881 eeprom_ch->max_power_avg,
882 ((eeprom_ch->flags & EEPROM_CHANNEL_IBSS) &&
883 !(eeprom_ch->flags & EEPROM_CHANNEL_RADAR)) ? "" : "not ");
884
885 ch_info->ht40_eeprom = *eeprom_ch;
886 ch_info->ht40_max_power_avg = eeprom_ch->max_power_avg;
887 ch_info->ht40_flags = eeprom_ch->flags;
888 if (eeprom_ch->flags & EEPROM_CHANNEL_VALID)
889 ch_info->ht40_extension_channel &=
890 ~clear_ht40_extension_channel;
891
892 return 0;
893 }
894
895 #define CHECK_AND_PRINT_I(x) ((eeprom_ch_info[ch].flags & EEPROM_CHANNEL_##x) \
896 ? # x " " : "")
897
898 /**
899 * il_init_channel_map - Set up driver's info for all possible channels
900 */
901 int
902 il_init_channel_map(struct il_priv *il)
903 {
904 int eeprom_ch_count = 0;
905 const u8 *eeprom_ch_idx = NULL;
906 const struct il_eeprom_channel *eeprom_ch_info = NULL;
907 int band, ch;
908 struct il_channel_info *ch_info;
909
910 if (il->channel_count) {
911 D_EEPROM("Channel map already initialized.\n");
912 return 0;
913 }
914
915 D_EEPROM("Initializing regulatory info from EEPROM\n");
916
917 il->channel_count =
918 ARRAY_SIZE(il_eeprom_band_1) + ARRAY_SIZE(il_eeprom_band_2) +
919 ARRAY_SIZE(il_eeprom_band_3) + ARRAY_SIZE(il_eeprom_band_4) +
920 ARRAY_SIZE(il_eeprom_band_5);
921
922 D_EEPROM("Parsing data for %d channels.\n", il->channel_count);
923
924 il->channel_info =
925 kzalloc(sizeof(struct il_channel_info) * il->channel_count,
926 GFP_KERNEL);
927 if (!il->channel_info) {
928 IL_ERR("Could not allocate channel_info\n");
929 il->channel_count = 0;
930 return -ENOMEM;
931 }
932
933 ch_info = il->channel_info;
934
935 /* Loop through the 5 EEPROM bands adding them in order to the
936 * channel map we maintain (that contains additional information than
937 * what just in the EEPROM) */
938 for (band = 1; band <= 5; band++) {
939
940 il_init_band_reference(il, band, &eeprom_ch_count,
941 &eeprom_ch_info, &eeprom_ch_idx);
942
943 /* Loop through each band adding each of the channels */
944 for (ch = 0; ch < eeprom_ch_count; ch++) {
945 ch_info->channel = eeprom_ch_idx[ch];
946 ch_info->band =
947 (band ==
948 1) ? NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
949
950 /* permanently store EEPROM's channel regulatory flags
951 * and max power in channel info database. */
952 ch_info->eeprom = eeprom_ch_info[ch];
953
954 /* Copy the run-time flags so they are there even on
955 * invalid channels */
956 ch_info->flags = eeprom_ch_info[ch].flags;
957 /* First write that ht40 is not enabled, and then enable
958 * one by one */
959 ch_info->ht40_extension_channel =
960 IEEE80211_CHAN_NO_HT40;
961
962 if (!(il_is_channel_valid(ch_info))) {
963 D_EEPROM("Ch. %d Flags %x [%sGHz] - "
964 "No traffic\n", ch_info->channel,
965 ch_info->flags,
966 il_is_channel_a_band(ch_info) ? "5.2" :
967 "2.4");
968 ch_info++;
969 continue;
970 }
971
972 /* Initialize regulatory-based run-time data */
973 ch_info->max_power_avg = ch_info->curr_txpow =
974 eeprom_ch_info[ch].max_power_avg;
975 ch_info->scan_power = eeprom_ch_info[ch].max_power_avg;
976 ch_info->min_power = 0;
977
978 D_EEPROM("Ch. %d [%sGHz] " "%s%s%s%s%s%s(0x%02x %ddBm):"
979 " Ad-Hoc %ssupported\n", ch_info->channel,
980 il_is_channel_a_band(ch_info) ? "5.2" : "2.4",
981 CHECK_AND_PRINT_I(VALID),
982 CHECK_AND_PRINT_I(IBSS),
983 CHECK_AND_PRINT_I(ACTIVE),
984 CHECK_AND_PRINT_I(RADAR),
985 CHECK_AND_PRINT_I(WIDE),
986 CHECK_AND_PRINT_I(DFS),
987 eeprom_ch_info[ch].flags,
988 eeprom_ch_info[ch].max_power_avg,
989 ((eeprom_ch_info[ch].
990 flags & EEPROM_CHANNEL_IBSS) &&
991 !(eeprom_ch_info[ch].
992 flags & EEPROM_CHANNEL_RADAR)) ? "" :
993 "not ");
994
995 ch_info++;
996 }
997 }
998
999 /* Check if we do have HT40 channels */
1000 if (il->cfg->regulatory_bands[5] == EEPROM_REGULATORY_BAND_NO_HT40 &&
1001 il->cfg->regulatory_bands[6] == EEPROM_REGULATORY_BAND_NO_HT40)
1002 return 0;
1003
1004 /* Two additional EEPROM bands for 2.4 and 5 GHz HT40 channels */
1005 for (band = 6; band <= 7; band++) {
1006 enum nl80211_band ieeeband;
1007
1008 il_init_band_reference(il, band, &eeprom_ch_count,
1009 &eeprom_ch_info, &eeprom_ch_idx);
1010
1011 /* EEPROM band 6 is 2.4, band 7 is 5 GHz */
1012 ieeeband =
1013 (band == 6) ? NL80211_BAND_2GHZ : NL80211_BAND_5GHZ;
1014
1015 /* Loop through each band adding each of the channels */
1016 for (ch = 0; ch < eeprom_ch_count; ch++) {
1017 /* Set up driver's info for lower half */
1018 il_mod_ht40_chan_info(il, ieeeband, eeprom_ch_idx[ch],
1019 &eeprom_ch_info[ch],
1020 IEEE80211_CHAN_NO_HT40PLUS);
1021
1022 /* Set up driver's info for upper half */
1023 il_mod_ht40_chan_info(il, ieeeband,
1024 eeprom_ch_idx[ch] + 4,
1025 &eeprom_ch_info[ch],
1026 IEEE80211_CHAN_NO_HT40MINUS);
1027 }
1028 }
1029
1030 return 0;
1031 }
1032 EXPORT_SYMBOL(il_init_channel_map);
1033
1034 /*
1035 * il_free_channel_map - undo allocations in il_init_channel_map
1036 */
1037 void
1038 il_free_channel_map(struct il_priv *il)
1039 {
1040 kfree(il->channel_info);
1041 il->channel_count = 0;
1042 }
1043 EXPORT_SYMBOL(il_free_channel_map);
1044
1045 /**
1046 * il_get_channel_info - Find driver's ilate channel info
1047 *
1048 * Based on band and channel number.
1049 */
1050 const struct il_channel_info *
1051 il_get_channel_info(const struct il_priv *il, enum nl80211_band band,
1052 u16 channel)
1053 {
1054 int i;
1055
1056 switch (band) {
1057 case NL80211_BAND_5GHZ:
1058 for (i = 14; i < il->channel_count; i++) {
1059 if (il->channel_info[i].channel == channel)
1060 return &il->channel_info[i];
1061 }
1062 break;
1063 case NL80211_BAND_2GHZ:
1064 if (channel >= 1 && channel <= 14)
1065 return &il->channel_info[channel - 1];
1066 break;
1067 default:
1068 BUG();
1069 }
1070
1071 return NULL;
1072 }
1073 EXPORT_SYMBOL(il_get_channel_info);
1074
1075 /*
1076 * Setting power level allows the card to go to sleep when not busy.
1077 *
1078 * We calculate a sleep command based on the required latency, which
1079 * we get from mac80211.
1080 */
1081
1082 #define SLP_VEC(X0, X1, X2, X3, X4) { \
1083 cpu_to_le32(X0), \
1084 cpu_to_le32(X1), \
1085 cpu_to_le32(X2), \
1086 cpu_to_le32(X3), \
1087 cpu_to_le32(X4) \
1088 }
1089
1090 static void
1091 il_build_powertable_cmd(struct il_priv *il, struct il_powertable_cmd *cmd)
1092 {
1093 const __le32 interval[3][IL_POWER_VEC_SIZE] = {
1094 SLP_VEC(2, 2, 4, 6, 0xFF),
1095 SLP_VEC(2, 4, 7, 10, 10),
1096 SLP_VEC(4, 7, 10, 10, 0xFF)
1097 };
1098 int i, dtim_period, no_dtim;
1099 u32 max_sleep;
1100 bool skip;
1101
1102 memset(cmd, 0, sizeof(*cmd));
1103
1104 if (il->power_data.pci_pm)
1105 cmd->flags |= IL_POWER_PCI_PM_MSK;
1106
1107 /* if no Power Save, we are done */
1108 if (il->power_data.ps_disabled)
1109 return;
1110
1111 cmd->flags = IL_POWER_DRIVER_ALLOW_SLEEP_MSK;
1112 cmd->keep_alive_seconds = 0;
1113 cmd->debug_flags = 0;
1114 cmd->rx_data_timeout = cpu_to_le32(25 * 1024);
1115 cmd->tx_data_timeout = cpu_to_le32(25 * 1024);
1116 cmd->keep_alive_beacons = 0;
1117
1118 dtim_period = il->vif ? il->vif->bss_conf.dtim_period : 0;
1119
1120 if (dtim_period <= 2) {
1121 memcpy(cmd->sleep_interval, interval[0], sizeof(interval[0]));
1122 no_dtim = 2;
1123 } else if (dtim_period <= 10) {
1124 memcpy(cmd->sleep_interval, interval[1], sizeof(interval[1]));
1125 no_dtim = 2;
1126 } else {
1127 memcpy(cmd->sleep_interval, interval[2], sizeof(interval[2]));
1128 no_dtim = 0;
1129 }
1130
1131 if (dtim_period == 0) {
1132 dtim_period = 1;
1133 skip = false;
1134 } else {
1135 skip = !!no_dtim;
1136 }
1137
1138 if (skip) {
1139 __le32 tmp = cmd->sleep_interval[IL_POWER_VEC_SIZE - 1];
1140
1141 max_sleep = le32_to_cpu(tmp);
1142 if (max_sleep == 0xFF)
1143 max_sleep = dtim_period * (skip + 1);
1144 else if (max_sleep > dtim_period)
1145 max_sleep = (max_sleep / dtim_period) * dtim_period;
1146 cmd->flags |= IL_POWER_SLEEP_OVER_DTIM_MSK;
1147 } else {
1148 max_sleep = dtim_period;
1149 cmd->flags &= ~IL_POWER_SLEEP_OVER_DTIM_MSK;
1150 }
1151
1152 for (i = 0; i < IL_POWER_VEC_SIZE; i++)
1153 if (le32_to_cpu(cmd->sleep_interval[i]) > max_sleep)
1154 cmd->sleep_interval[i] = cpu_to_le32(max_sleep);
1155 }
1156
1157 static int
1158 il_set_power(struct il_priv *il, struct il_powertable_cmd *cmd)
1159 {
1160 D_POWER("Sending power/sleep command\n");
1161 D_POWER("Flags value = 0x%08X\n", cmd->flags);
1162 D_POWER("Tx timeout = %u\n", le32_to_cpu(cmd->tx_data_timeout));
1163 D_POWER("Rx timeout = %u\n", le32_to_cpu(cmd->rx_data_timeout));
1164 D_POWER("Sleep interval vector = { %d , %d , %d , %d , %d }\n",
1165 le32_to_cpu(cmd->sleep_interval[0]),
1166 le32_to_cpu(cmd->sleep_interval[1]),
1167 le32_to_cpu(cmd->sleep_interval[2]),
1168 le32_to_cpu(cmd->sleep_interval[3]),
1169 le32_to_cpu(cmd->sleep_interval[4]));
1170
1171 return il_send_cmd_pdu(il, C_POWER_TBL,
1172 sizeof(struct il_powertable_cmd), cmd);
1173 }
1174
1175 static int
1176 il_power_set_mode(struct il_priv *il, struct il_powertable_cmd *cmd, bool force)
1177 {
1178 int ret;
1179 bool update_chains;
1180
1181 lockdep_assert_held(&il->mutex);
1182
1183 /* Don't update the RX chain when chain noise calibration is running */
1184 update_chains = il->chain_noise_data.state == IL_CHAIN_NOISE_DONE ||
1185 il->chain_noise_data.state == IL_CHAIN_NOISE_ALIVE;
1186
1187 if (!memcmp(&il->power_data.sleep_cmd, cmd, sizeof(*cmd)) && !force)
1188 return 0;
1189
1190 if (!il_is_ready_rf(il))
1191 return -EIO;
1192
1193 /* scan complete use sleep_power_next, need to be updated */
1194 memcpy(&il->power_data.sleep_cmd_next, cmd, sizeof(*cmd));
1195 if (test_bit(S_SCANNING, &il->status) && !force) {
1196 D_INFO("Defer power set mode while scanning\n");
1197 return 0;
1198 }
1199
1200 if (cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK)
1201 set_bit(S_POWER_PMI, &il->status);
1202
1203 ret = il_set_power(il, cmd);
1204 if (!ret) {
1205 if (!(cmd->flags & IL_POWER_DRIVER_ALLOW_SLEEP_MSK))
1206 clear_bit(S_POWER_PMI, &il->status);
1207
1208 if (il->ops->update_chain_flags && update_chains)
1209 il->ops->update_chain_flags(il);
1210 else if (il->ops->update_chain_flags)
1211 D_POWER("Cannot update the power, chain noise "
1212 "calibration running: %d\n",
1213 il->chain_noise_data.state);
1214
1215 memcpy(&il->power_data.sleep_cmd, cmd, sizeof(*cmd));
1216 } else
1217 IL_ERR("set power fail, ret = %d", ret);
1218
1219 return ret;
1220 }
1221
1222 int
1223 il_power_update_mode(struct il_priv *il, bool force)
1224 {
1225 struct il_powertable_cmd cmd;
1226
1227 il_build_powertable_cmd(il, &cmd);
1228
1229 return il_power_set_mode(il, &cmd, force);
1230 }
1231 EXPORT_SYMBOL(il_power_update_mode);
1232
1233 /* initialize to default */
1234 void
1235 il_power_initialize(struct il_priv *il)
1236 {
1237 u16 lctl;
1238
1239 pcie_capability_read_word(il->pci_dev, PCI_EXP_LNKCTL, &lctl);
1240 il->power_data.pci_pm = !(lctl & PCI_EXP_LNKCTL_ASPM_L0S);
1241
1242 il->power_data.debug_sleep_level_override = -1;
1243
1244 memset(&il->power_data.sleep_cmd, 0, sizeof(il->power_data.sleep_cmd));
1245 }
1246 EXPORT_SYMBOL(il_power_initialize);
1247
1248 /* For active scan, listen ACTIVE_DWELL_TIME (msec) on each channel after
1249 * sending probe req. This should be set long enough to hear probe responses
1250 * from more than one AP. */
1251 #define IL_ACTIVE_DWELL_TIME_24 (30) /* all times in msec */
1252 #define IL_ACTIVE_DWELL_TIME_52 (20)
1253
1254 #define IL_ACTIVE_DWELL_FACTOR_24GHZ (3)
1255 #define IL_ACTIVE_DWELL_FACTOR_52GHZ (2)
1256
1257 /* For passive scan, listen PASSIVE_DWELL_TIME (msec) on each channel.
1258 * Must be set longer than active dwell time.
1259 * For the most reliable scan, set > AP beacon interval (typically 100msec). */
1260 #define IL_PASSIVE_DWELL_TIME_24 (20) /* all times in msec */
1261 #define IL_PASSIVE_DWELL_TIME_52 (10)
1262 #define IL_PASSIVE_DWELL_BASE (100)
1263 #define IL_CHANNEL_TUNE_TIME 5
1264
1265 static int
1266 il_send_scan_abort(struct il_priv *il)
1267 {
1268 int ret;
1269 struct il_rx_pkt *pkt;
1270 struct il_host_cmd cmd = {
1271 .id = C_SCAN_ABORT,
1272 .flags = CMD_WANT_SKB,
1273 };
1274
1275 /* Exit instantly with error when device is not ready
1276 * to receive scan abort command or it does not perform
1277 * hardware scan currently */
1278 if (!test_bit(S_READY, &il->status) ||
1279 !test_bit(S_GEO_CONFIGURED, &il->status) ||
1280 !test_bit(S_SCAN_HW, &il->status) ||
1281 test_bit(S_FW_ERROR, &il->status) ||
1282 test_bit(S_EXIT_PENDING, &il->status))
1283 return -EIO;
1284
1285 ret = il_send_cmd_sync(il, &cmd);
1286 if (ret)
1287 return ret;
1288
1289 pkt = (struct il_rx_pkt *)cmd.reply_page;
1290 if (pkt->u.status != CAN_ABORT_STATUS) {
1291 /* The scan abort will return 1 for success or
1292 * 2 for "failure". A failure condition can be
1293 * due to simply not being in an active scan which
1294 * can occur if we send the scan abort before we
1295 * the microcode has notified us that a scan is
1296 * completed. */
1297 D_SCAN("SCAN_ABORT ret %d.\n", pkt->u.status);
1298 ret = -EIO;
1299 }
1300
1301 il_free_pages(il, cmd.reply_page);
1302 return ret;
1303 }
1304
1305 static void
1306 il_complete_scan(struct il_priv *il, bool aborted)
1307 {
1308 /* check if scan was requested from mac80211 */
1309 if (il->scan_request) {
1310 D_SCAN("Complete scan in mac80211\n");
1311 ieee80211_scan_completed(il->hw, aborted);
1312 }
1313
1314 il->scan_vif = NULL;
1315 il->scan_request = NULL;
1316 }
1317
1318 void
1319 il_force_scan_end(struct il_priv *il)
1320 {
1321 lockdep_assert_held(&il->mutex);
1322
1323 if (!test_bit(S_SCANNING, &il->status)) {
1324 D_SCAN("Forcing scan end while not scanning\n");
1325 return;
1326 }
1327
1328 D_SCAN("Forcing scan end\n");
1329 clear_bit(S_SCANNING, &il->status);
1330 clear_bit(S_SCAN_HW, &il->status);
1331 clear_bit(S_SCAN_ABORTING, &il->status);
1332 il_complete_scan(il, true);
1333 }
1334
1335 static void
1336 il_do_scan_abort(struct il_priv *il)
1337 {
1338 int ret;
1339
1340 lockdep_assert_held(&il->mutex);
1341
1342 if (!test_bit(S_SCANNING, &il->status)) {
1343 D_SCAN("Not performing scan to abort\n");
1344 return;
1345 }
1346
1347 if (test_and_set_bit(S_SCAN_ABORTING, &il->status)) {
1348 D_SCAN("Scan abort in progress\n");
1349 return;
1350 }
1351
1352 ret = il_send_scan_abort(il);
1353 if (ret) {
1354 D_SCAN("Send scan abort failed %d\n", ret);
1355 il_force_scan_end(il);
1356 } else
1357 D_SCAN("Successfully send scan abort\n");
1358 }
1359
1360 /**
1361 * il_scan_cancel - Cancel any currently executing HW scan
1362 */
1363 int
1364 il_scan_cancel(struct il_priv *il)
1365 {
1366 D_SCAN("Queuing abort scan\n");
1367 queue_work(il->workqueue, &il->abort_scan);
1368 return 0;
1369 }
1370 EXPORT_SYMBOL(il_scan_cancel);
1371
1372 /**
1373 * il_scan_cancel_timeout - Cancel any currently executing HW scan
1374 * @ms: amount of time to wait (in milliseconds) for scan to abort
1375 *
1376 */
1377 int
1378 il_scan_cancel_timeout(struct il_priv *il, unsigned long ms)
1379 {
1380 unsigned long timeout = jiffies + msecs_to_jiffies(ms);
1381
1382 lockdep_assert_held(&il->mutex);
1383
1384 D_SCAN("Scan cancel timeout\n");
1385
1386 il_do_scan_abort(il);
1387
1388 while (time_before_eq(jiffies, timeout)) {
1389 if (!test_bit(S_SCAN_HW, &il->status))
1390 break;
1391 msleep(20);
1392 }
1393
1394 return test_bit(S_SCAN_HW, &il->status);
1395 }
1396 EXPORT_SYMBOL(il_scan_cancel_timeout);
1397
1398 /* Service response to C_SCAN (0x80) */
1399 static void
1400 il_hdl_scan(struct il_priv *il, struct il_rx_buf *rxb)
1401 {
1402 #ifdef CONFIG_IWLEGACY_DEBUG
1403 struct il_rx_pkt *pkt = rxb_addr(rxb);
1404 struct il_scanreq_notification *notif =
1405 (struct il_scanreq_notification *)pkt->u.raw;
1406
1407 D_SCAN("Scan request status = 0x%x\n", notif->status);
1408 #endif
1409 }
1410
1411 /* Service N_SCAN_START (0x82) */
1412 static void
1413 il_hdl_scan_start(struct il_priv *il, struct il_rx_buf *rxb)
1414 {
1415 struct il_rx_pkt *pkt = rxb_addr(rxb);
1416 struct il_scanstart_notification *notif =
1417 (struct il_scanstart_notification *)pkt->u.raw;
1418 il->scan_start_tsf = le32_to_cpu(notif->tsf_low);
1419 D_SCAN("Scan start: " "%d [802.11%s] "
1420 "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n", notif->channel,
1421 notif->band ? "bg" : "a", le32_to_cpu(notif->tsf_high),
1422 le32_to_cpu(notif->tsf_low), notif->status, notif->beacon_timer);
1423 }
1424
1425 /* Service N_SCAN_RESULTS (0x83) */
1426 static void
1427 il_hdl_scan_results(struct il_priv *il, struct il_rx_buf *rxb)
1428 {
1429 #ifdef CONFIG_IWLEGACY_DEBUG
1430 struct il_rx_pkt *pkt = rxb_addr(rxb);
1431 struct il_scanresults_notification *notif =
1432 (struct il_scanresults_notification *)pkt->u.raw;
1433
1434 D_SCAN("Scan ch.res: " "%d [802.11%s] " "(TSF: 0x%08X:%08X) - %d "
1435 "elapsed=%lu usec\n", notif->channel, notif->band ? "bg" : "a",
1436 le32_to_cpu(notif->tsf_high), le32_to_cpu(notif->tsf_low),
1437 le32_to_cpu(notif->stats[0]),
1438 le32_to_cpu(notif->tsf_low) - il->scan_start_tsf);
1439 #endif
1440 }
1441
1442 /* Service N_SCAN_COMPLETE (0x84) */
1443 static void
1444 il_hdl_scan_complete(struct il_priv *il, struct il_rx_buf *rxb)
1445 {
1446
1447 #ifdef CONFIG_IWLEGACY_DEBUG
1448 struct il_rx_pkt *pkt = rxb_addr(rxb);
1449 struct il_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
1450 #endif
1451
1452 D_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
1453 scan_notif->scanned_channels, scan_notif->tsf_low,
1454 scan_notif->tsf_high, scan_notif->status);
1455
1456 /* The HW is no longer scanning */
1457 clear_bit(S_SCAN_HW, &il->status);
1458
1459 D_SCAN("Scan on %sGHz took %dms\n",
1460 (il->scan_band == NL80211_BAND_2GHZ) ? "2.4" : "5.2",
1461 jiffies_to_msecs(jiffies - il->scan_start));
1462
1463 queue_work(il->workqueue, &il->scan_completed);
1464 }
1465
1466 void
1467 il_setup_rx_scan_handlers(struct il_priv *il)
1468 {
1469 /* scan handlers */
1470 il->handlers[C_SCAN] = il_hdl_scan;
1471 il->handlers[N_SCAN_START] = il_hdl_scan_start;
1472 il->handlers[N_SCAN_RESULTS] = il_hdl_scan_results;
1473 il->handlers[N_SCAN_COMPLETE] = il_hdl_scan_complete;
1474 }
1475 EXPORT_SYMBOL(il_setup_rx_scan_handlers);
1476
1477 u16
1478 il_get_active_dwell_time(struct il_priv *il, enum nl80211_band band,
1479 u8 n_probes)
1480 {
1481 if (band == NL80211_BAND_5GHZ)
1482 return IL_ACTIVE_DWELL_TIME_52 +
1483 IL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1);
1484 else
1485 return IL_ACTIVE_DWELL_TIME_24 +
1486 IL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1);
1487 }
1488 EXPORT_SYMBOL(il_get_active_dwell_time);
1489
1490 u16
1491 il_get_passive_dwell_time(struct il_priv *il, enum nl80211_band band,
1492 struct ieee80211_vif *vif)
1493 {
1494 u16 value;
1495
1496 u16 passive =
1497 (band ==
1498 NL80211_BAND_2GHZ) ? IL_PASSIVE_DWELL_BASE +
1499 IL_PASSIVE_DWELL_TIME_24 : IL_PASSIVE_DWELL_BASE +
1500 IL_PASSIVE_DWELL_TIME_52;
1501
1502 if (il_is_any_associated(il)) {
1503 /*
1504 * If we're associated, we clamp the maximum passive
1505 * dwell time to be 98% of the smallest beacon interval
1506 * (minus 2 * channel tune time)
1507 */
1508 value = il->vif ? il->vif->bss_conf.beacon_int : 0;
1509 if (value > IL_PASSIVE_DWELL_BASE || !value)
1510 value = IL_PASSIVE_DWELL_BASE;
1511 value = (value * 98) / 100 - IL_CHANNEL_TUNE_TIME * 2;
1512 passive = min(value, passive);
1513 }
1514
1515 return passive;
1516 }
1517 EXPORT_SYMBOL(il_get_passive_dwell_time);
1518
1519 void
1520 il_init_scan_params(struct il_priv *il)
1521 {
1522 u8 ant_idx = fls(il->hw_params.valid_tx_ant) - 1;
1523 if (!il->scan_tx_ant[NL80211_BAND_5GHZ])
1524 il->scan_tx_ant[NL80211_BAND_5GHZ] = ant_idx;
1525 if (!il->scan_tx_ant[NL80211_BAND_2GHZ])
1526 il->scan_tx_ant[NL80211_BAND_2GHZ] = ant_idx;
1527 }
1528 EXPORT_SYMBOL(il_init_scan_params);
1529
1530 static int
1531 il_scan_initiate(struct il_priv *il, struct ieee80211_vif *vif)
1532 {
1533 int ret;
1534
1535 lockdep_assert_held(&il->mutex);
1536
1537 cancel_delayed_work(&il->scan_check);
1538
1539 if (!il_is_ready_rf(il)) {
1540 IL_WARN("Request scan called when driver not ready.\n");
1541 return -EIO;
1542 }
1543
1544 if (test_bit(S_SCAN_HW, &il->status)) {
1545 D_SCAN("Multiple concurrent scan requests in parallel.\n");
1546 return -EBUSY;
1547 }
1548
1549 if (test_bit(S_SCAN_ABORTING, &il->status)) {
1550 D_SCAN("Scan request while abort pending.\n");
1551 return -EBUSY;
1552 }
1553
1554 D_SCAN("Starting scan...\n");
1555
1556 set_bit(S_SCANNING, &il->status);
1557 il->scan_start = jiffies;
1558
1559 ret = il->ops->request_scan(il, vif);
1560 if (ret) {
1561 clear_bit(S_SCANNING, &il->status);
1562 return ret;
1563 }
1564
1565 queue_delayed_work(il->workqueue, &il->scan_check,
1566 IL_SCAN_CHECK_WATCHDOG);
1567
1568 return 0;
1569 }
1570
1571 int
1572 il_mac_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1573 struct ieee80211_scan_request *hw_req)
1574 {
1575 struct cfg80211_scan_request *req = &hw_req->req;
1576 struct il_priv *il = hw->priv;
1577 int ret;
1578
1579 if (req->n_channels == 0) {
1580 IL_ERR("Can not scan on no channels.\n");
1581 return -EINVAL;
1582 }
1583
1584 mutex_lock(&il->mutex);
1585 D_MAC80211("enter\n");
1586
1587 if (test_bit(S_SCANNING, &il->status)) {
1588 D_SCAN("Scan already in progress.\n");
1589 ret = -EAGAIN;
1590 goto out_unlock;
1591 }
1592
1593 /* mac80211 will only ask for one band at a time */
1594 il->scan_request = req;
1595 il->scan_vif = vif;
1596 il->scan_band = req->channels[0]->band;
1597
1598 ret = il_scan_initiate(il, vif);
1599
1600 out_unlock:
1601 D_MAC80211("leave ret %d\n", ret);
1602 mutex_unlock(&il->mutex);
1603
1604 return ret;
1605 }
1606 EXPORT_SYMBOL(il_mac_hw_scan);
1607
1608 static void
1609 il_bg_scan_check(struct work_struct *data)
1610 {
1611 struct il_priv *il =
1612 container_of(data, struct il_priv, scan_check.work);
1613
1614 D_SCAN("Scan check work\n");
1615
1616 /* Since we are here firmware does not finish scan and
1617 * most likely is in bad shape, so we don't bother to
1618 * send abort command, just force scan complete to mac80211 */
1619 mutex_lock(&il->mutex);
1620 il_force_scan_end(il);
1621 mutex_unlock(&il->mutex);
1622 }
1623
1624 /**
1625 * il_fill_probe_req - fill in all required fields and IE for probe request
1626 */
1627
1628 u16
1629 il_fill_probe_req(struct il_priv *il, struct ieee80211_mgmt *frame,
1630 const u8 *ta, const u8 *ies, int ie_len, int left)
1631 {
1632 int len = 0;
1633 u8 *pos = NULL;
1634
1635 /* Make sure there is enough space for the probe request,
1636 * two mandatory IEs and the data */
1637 left -= 24;
1638 if (left < 0)
1639 return 0;
1640
1641 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1642 eth_broadcast_addr(frame->da);
1643 memcpy(frame->sa, ta, ETH_ALEN);
1644 eth_broadcast_addr(frame->bssid);
1645 frame->seq_ctrl = 0;
1646
1647 len += 24;
1648
1649 /* ...next IE... */
1650 pos = &frame->u.probe_req.variable[0];
1651
1652 /* fill in our indirect SSID IE */
1653 left -= 2;
1654 if (left < 0)
1655 return 0;
1656 *pos++ = WLAN_EID_SSID;
1657 *pos++ = 0;
1658
1659 len += 2;
1660
1661 if (WARN_ON(left < ie_len))
1662 return len;
1663
1664 if (ies && ie_len) {
1665 memcpy(pos, ies, ie_len);
1666 len += ie_len;
1667 }
1668
1669 return (u16) len;
1670 }
1671 EXPORT_SYMBOL(il_fill_probe_req);
1672
1673 static void
1674 il_bg_abort_scan(struct work_struct *work)
1675 {
1676 struct il_priv *il = container_of(work, struct il_priv, abort_scan);
1677
1678 D_SCAN("Abort scan work\n");
1679
1680 /* We keep scan_check work queued in case when firmware will not
1681 * report back scan completed notification */
1682 mutex_lock(&il->mutex);
1683 il_scan_cancel_timeout(il, 200);
1684 mutex_unlock(&il->mutex);
1685 }
1686
1687 static void
1688 il_bg_scan_completed(struct work_struct *work)
1689 {
1690 struct il_priv *il = container_of(work, struct il_priv, scan_completed);
1691 bool aborted;
1692
1693 D_SCAN("Completed scan.\n");
1694
1695 cancel_delayed_work(&il->scan_check);
1696
1697 mutex_lock(&il->mutex);
1698
1699 aborted = test_and_clear_bit(S_SCAN_ABORTING, &il->status);
1700 if (aborted)
1701 D_SCAN("Aborted scan completed.\n");
1702
1703 if (!test_and_clear_bit(S_SCANNING, &il->status)) {
1704 D_SCAN("Scan already completed.\n");
1705 goto out_settings;
1706 }
1707
1708 il_complete_scan(il, aborted);
1709
1710 out_settings:
1711 /* Can we still talk to firmware ? */
1712 if (!il_is_ready_rf(il))
1713 goto out;
1714
1715 /*
1716 * We do not commit power settings while scan is pending,
1717 * do it now if the settings changed.
1718 */
1719 il_power_set_mode(il, &il->power_data.sleep_cmd_next, false);
1720 il_set_tx_power(il, il->tx_power_next, false);
1721
1722 il->ops->post_scan(il);
1723
1724 out:
1725 mutex_unlock(&il->mutex);
1726 }
1727
1728 void
1729 il_setup_scan_deferred_work(struct il_priv *il)
1730 {
1731 INIT_WORK(&il->scan_completed, il_bg_scan_completed);
1732 INIT_WORK(&il->abort_scan, il_bg_abort_scan);
1733 INIT_DELAYED_WORK(&il->scan_check, il_bg_scan_check);
1734 }
1735 EXPORT_SYMBOL(il_setup_scan_deferred_work);
1736
1737 void
1738 il_cancel_scan_deferred_work(struct il_priv *il)
1739 {
1740 cancel_work_sync(&il->abort_scan);
1741 cancel_work_sync(&il->scan_completed);
1742
1743 if (cancel_delayed_work_sync(&il->scan_check)) {
1744 mutex_lock(&il->mutex);
1745 il_force_scan_end(il);
1746 mutex_unlock(&il->mutex);
1747 }
1748 }
1749 EXPORT_SYMBOL(il_cancel_scan_deferred_work);
1750
1751 /* il->sta_lock must be held */
1752 static void
1753 il_sta_ucode_activate(struct il_priv *il, u8 sta_id)
1754 {
1755
1756 if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE))
1757 IL_ERR("ACTIVATE a non DRIVER active station id %u addr %pM\n",
1758 sta_id, il->stations[sta_id].sta.sta.addr);
1759
1760 if (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) {
1761 D_ASSOC("STA id %u addr %pM already present"
1762 " in uCode (according to driver)\n", sta_id,
1763 il->stations[sta_id].sta.sta.addr);
1764 } else {
1765 il->stations[sta_id].used |= IL_STA_UCODE_ACTIVE;
1766 D_ASSOC("Added STA id %u addr %pM to uCode\n", sta_id,
1767 il->stations[sta_id].sta.sta.addr);
1768 }
1769 }
1770
1771 static int
1772 il_process_add_sta_resp(struct il_priv *il, struct il_addsta_cmd *addsta,
1773 struct il_rx_pkt *pkt, bool sync)
1774 {
1775 u8 sta_id = addsta->sta.sta_id;
1776 unsigned long flags;
1777 int ret = -EIO;
1778
1779 if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
1780 IL_ERR("Bad return from C_ADD_STA (0x%08X)\n", pkt->hdr.flags);
1781 return ret;
1782 }
1783
1784 D_INFO("Processing response for adding station %u\n", sta_id);
1785
1786 spin_lock_irqsave(&il->sta_lock, flags);
1787
1788 switch (pkt->u.add_sta.status) {
1789 case ADD_STA_SUCCESS_MSK:
1790 D_INFO("C_ADD_STA PASSED\n");
1791 il_sta_ucode_activate(il, sta_id);
1792 ret = 0;
1793 break;
1794 case ADD_STA_NO_ROOM_IN_TBL:
1795 IL_ERR("Adding station %d failed, no room in table.\n", sta_id);
1796 break;
1797 case ADD_STA_NO_BLOCK_ACK_RESOURCE:
1798 IL_ERR("Adding station %d failed, no block ack resource.\n",
1799 sta_id);
1800 break;
1801 case ADD_STA_MODIFY_NON_EXIST_STA:
1802 IL_ERR("Attempting to modify non-existing station %d\n",
1803 sta_id);
1804 break;
1805 default:
1806 D_ASSOC("Received C_ADD_STA:(0x%08X)\n", pkt->u.add_sta.status);
1807 break;
1808 }
1809
1810 D_INFO("%s station id %u addr %pM\n",
1811 il->stations[sta_id].sta.mode ==
1812 STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", sta_id,
1813 il->stations[sta_id].sta.sta.addr);
1814
1815 /*
1816 * XXX: The MAC address in the command buffer is often changed from
1817 * the original sent to the device. That is, the MAC address
1818 * written to the command buffer often is not the same MAC address
1819 * read from the command buffer when the command returns. This
1820 * issue has not yet been resolved and this debugging is left to
1821 * observe the problem.
1822 */
1823 D_INFO("%s station according to cmd buffer %pM\n",
1824 il->stations[sta_id].sta.mode ==
1825 STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", addsta->sta.addr);
1826 spin_unlock_irqrestore(&il->sta_lock, flags);
1827
1828 return ret;
1829 }
1830
1831 static void
1832 il_add_sta_callback(struct il_priv *il, struct il_device_cmd *cmd,
1833 struct il_rx_pkt *pkt)
1834 {
1835 struct il_addsta_cmd *addsta = (struct il_addsta_cmd *)cmd->cmd.payload;
1836
1837 il_process_add_sta_resp(il, addsta, pkt, false);
1838
1839 }
1840
1841 int
1842 il_send_add_sta(struct il_priv *il, struct il_addsta_cmd *sta, u8 flags)
1843 {
1844 struct il_rx_pkt *pkt = NULL;
1845 int ret = 0;
1846 u8 data[sizeof(*sta)];
1847 struct il_host_cmd cmd = {
1848 .id = C_ADD_STA,
1849 .flags = flags,
1850 .data = data,
1851 };
1852 u8 sta_id __maybe_unused = sta->sta.sta_id;
1853
1854 D_INFO("Adding sta %u (%pM) %ssynchronously\n", sta_id, sta->sta.addr,
1855 flags & CMD_ASYNC ? "a" : "");
1856
1857 if (flags & CMD_ASYNC)
1858 cmd.callback = il_add_sta_callback;
1859 else {
1860 cmd.flags |= CMD_WANT_SKB;
1861 might_sleep();
1862 }
1863
1864 cmd.len = il->ops->build_addsta_hcmd(sta, data);
1865 ret = il_send_cmd(il, &cmd);
1866 if (ret)
1867 return ret;
1868 if (flags & CMD_ASYNC)
1869 return 0;
1870
1871 pkt = (struct il_rx_pkt *)cmd.reply_page;
1872 ret = il_process_add_sta_resp(il, sta, pkt, true);
1873
1874 il_free_pages(il, cmd.reply_page);
1875
1876 return ret;
1877 }
1878 EXPORT_SYMBOL(il_send_add_sta);
1879
1880 static void
1881 il_set_ht_add_station(struct il_priv *il, u8 idx, struct ieee80211_sta *sta)
1882 {
1883 struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
1884 __le32 sta_flags;
1885
1886 if (!sta || !sta_ht_inf->ht_supported)
1887 goto done;
1888
1889 D_ASSOC("spatial multiplexing power save mode: %s\n",
1890 (sta->smps_mode == IEEE80211_SMPS_STATIC) ? "static" :
1891 (sta->smps_mode == IEEE80211_SMPS_DYNAMIC) ? "dynamic" :
1892 "disabled");
1893
1894 sta_flags = il->stations[idx].sta.station_flags;
1895
1896 sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
1897
1898 switch (sta->smps_mode) {
1899 case IEEE80211_SMPS_STATIC:
1900 sta_flags |= STA_FLG_MIMO_DIS_MSK;
1901 break;
1902 case IEEE80211_SMPS_DYNAMIC:
1903 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
1904 break;
1905 case IEEE80211_SMPS_OFF:
1906 break;
1907 default:
1908 IL_WARN("Invalid MIMO PS mode %d\n", sta->smps_mode);
1909 break;
1910 }
1911
1912 sta_flags |=
1913 cpu_to_le32((u32) sta_ht_inf->
1914 ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
1915
1916 sta_flags |=
1917 cpu_to_le32((u32) sta_ht_inf->
1918 ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
1919
1920 if (il_is_ht40_tx_allowed(il, &sta->ht_cap))
1921 sta_flags |= STA_FLG_HT40_EN_MSK;
1922 else
1923 sta_flags &= ~STA_FLG_HT40_EN_MSK;
1924
1925 il->stations[idx].sta.station_flags = sta_flags;
1926 done:
1927 return;
1928 }
1929
1930 /**
1931 * il_prep_station - Prepare station information for addition
1932 *
1933 * should be called with sta_lock held
1934 */
1935 u8
1936 il_prep_station(struct il_priv *il, const u8 *addr, bool is_ap,
1937 struct ieee80211_sta *sta)
1938 {
1939 struct il_station_entry *station;
1940 int i;
1941 u8 sta_id = IL_INVALID_STATION;
1942 u16 rate;
1943
1944 if (is_ap)
1945 sta_id = IL_AP_ID;
1946 else if (is_broadcast_ether_addr(addr))
1947 sta_id = il->hw_params.bcast_id;
1948 else
1949 for (i = IL_STA_ID; i < il->hw_params.max_stations; i++) {
1950 if (ether_addr_equal(il->stations[i].sta.sta.addr,
1951 addr)) {
1952 sta_id = i;
1953 break;
1954 }
1955
1956 if (!il->stations[i].used &&
1957 sta_id == IL_INVALID_STATION)
1958 sta_id = i;
1959 }
1960
1961 /*
1962 * These two conditions have the same outcome, but keep them
1963 * separate
1964 */
1965 if (unlikely(sta_id == IL_INVALID_STATION))
1966 return sta_id;
1967
1968 /*
1969 * uCode is not able to deal with multiple requests to add a
1970 * station. Keep track if one is in progress so that we do not send
1971 * another.
1972 */
1973 if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
1974 D_INFO("STA %d already in process of being added.\n", sta_id);
1975 return sta_id;
1976 }
1977
1978 if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
1979 (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) &&
1980 ether_addr_equal(il->stations[sta_id].sta.sta.addr, addr)) {
1981 D_ASSOC("STA %d (%pM) already added, not adding again.\n",
1982 sta_id, addr);
1983 return sta_id;
1984 }
1985
1986 station = &il->stations[sta_id];
1987 station->used = IL_STA_DRIVER_ACTIVE;
1988 D_ASSOC("Add STA to driver ID %d: %pM\n", sta_id, addr);
1989 il->num_stations++;
1990
1991 /* Set up the C_ADD_STA command to send to device */
1992 memset(&station->sta, 0, sizeof(struct il_addsta_cmd));
1993 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
1994 station->sta.mode = 0;
1995 station->sta.sta.sta_id = sta_id;
1996 station->sta.station_flags = 0;
1997
1998 /*
1999 * OK to call unconditionally, since local stations (IBSS BSSID
2000 * STA and broadcast STA) pass in a NULL sta, and mac80211
2001 * doesn't allow HT IBSS.
2002 */
2003 il_set_ht_add_station(il, sta_id, sta);
2004
2005 /* 3945 only */
2006 rate = (il->band == NL80211_BAND_5GHZ) ? RATE_6M_PLCP : RATE_1M_PLCP;
2007 /* Turn on both antennas for the station... */
2008 station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
2009
2010 return sta_id;
2011
2012 }
2013 EXPORT_SYMBOL_GPL(il_prep_station);
2014
2015 #define STA_WAIT_TIMEOUT (HZ/2)
2016
2017 /**
2018 * il_add_station_common -
2019 */
2020 int
2021 il_add_station_common(struct il_priv *il, const u8 *addr, bool is_ap,
2022 struct ieee80211_sta *sta, u8 *sta_id_r)
2023 {
2024 unsigned long flags_spin;
2025 int ret = 0;
2026 u8 sta_id;
2027 struct il_addsta_cmd sta_cmd;
2028
2029 *sta_id_r = 0;
2030 spin_lock_irqsave(&il->sta_lock, flags_spin);
2031 sta_id = il_prep_station(il, addr, is_ap, sta);
2032 if (sta_id == IL_INVALID_STATION) {
2033 IL_ERR("Unable to prepare station %pM for addition\n", addr);
2034 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2035 return -EINVAL;
2036 }
2037
2038 /*
2039 * uCode is not able to deal with multiple requests to add a
2040 * station. Keep track if one is in progress so that we do not send
2041 * another.
2042 */
2043 if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
2044 D_INFO("STA %d already in process of being added.\n", sta_id);
2045 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2046 return -EEXIST;
2047 }
2048
2049 if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
2050 (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2051 D_ASSOC("STA %d (%pM) already added, not adding again.\n",
2052 sta_id, addr);
2053 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2054 return -EEXIST;
2055 }
2056
2057 il->stations[sta_id].used |= IL_STA_UCODE_INPROGRESS;
2058 memcpy(&sta_cmd, &il->stations[sta_id].sta,
2059 sizeof(struct il_addsta_cmd));
2060 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2061
2062 /* Add station to device's station table */
2063 ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2064 if (ret) {
2065 spin_lock_irqsave(&il->sta_lock, flags_spin);
2066 IL_ERR("Adding station %pM failed.\n",
2067 il->stations[sta_id].sta.sta.addr);
2068 il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2069 il->stations[sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2070 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2071 }
2072 *sta_id_r = sta_id;
2073 return ret;
2074 }
2075 EXPORT_SYMBOL(il_add_station_common);
2076
2077 /**
2078 * il_sta_ucode_deactivate - deactivate ucode status for a station
2079 *
2080 * il->sta_lock must be held
2081 */
2082 static void
2083 il_sta_ucode_deactivate(struct il_priv *il, u8 sta_id)
2084 {
2085 /* Ucode must be active and driver must be non active */
2086 if ((il->stations[sta_id].
2087 used & (IL_STA_UCODE_ACTIVE | IL_STA_DRIVER_ACTIVE)) !=
2088 IL_STA_UCODE_ACTIVE)
2089 IL_ERR("removed non active STA %u\n", sta_id);
2090
2091 il->stations[sta_id].used &= ~IL_STA_UCODE_ACTIVE;
2092
2093 memset(&il->stations[sta_id], 0, sizeof(struct il_station_entry));
2094 D_ASSOC("Removed STA %u\n", sta_id);
2095 }
2096
2097 static int
2098 il_send_remove_station(struct il_priv *il, const u8 * addr, int sta_id,
2099 bool temporary)
2100 {
2101 struct il_rx_pkt *pkt;
2102 int ret;
2103
2104 unsigned long flags_spin;
2105 struct il_rem_sta_cmd rm_sta_cmd;
2106
2107 struct il_host_cmd cmd = {
2108 .id = C_REM_STA,
2109 .len = sizeof(struct il_rem_sta_cmd),
2110 .flags = CMD_SYNC,
2111 .data = &rm_sta_cmd,
2112 };
2113
2114 memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
2115 rm_sta_cmd.num_sta = 1;
2116 memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
2117
2118 cmd.flags |= CMD_WANT_SKB;
2119
2120 ret = il_send_cmd(il, &cmd);
2121
2122 if (ret)
2123 return ret;
2124
2125 pkt = (struct il_rx_pkt *)cmd.reply_page;
2126 if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
2127 IL_ERR("Bad return from C_REM_STA (0x%08X)\n", pkt->hdr.flags);
2128 ret = -EIO;
2129 }
2130
2131 if (!ret) {
2132 switch (pkt->u.rem_sta.status) {
2133 case REM_STA_SUCCESS_MSK:
2134 if (!temporary) {
2135 spin_lock_irqsave(&il->sta_lock, flags_spin);
2136 il_sta_ucode_deactivate(il, sta_id);
2137 spin_unlock_irqrestore(&il->sta_lock,
2138 flags_spin);
2139 }
2140 D_ASSOC("C_REM_STA PASSED\n");
2141 break;
2142 default:
2143 ret = -EIO;
2144 IL_ERR("C_REM_STA failed\n");
2145 break;
2146 }
2147 }
2148 il_free_pages(il, cmd.reply_page);
2149
2150 return ret;
2151 }
2152
2153 /**
2154 * il_remove_station - Remove driver's knowledge of station.
2155 */
2156 int
2157 il_remove_station(struct il_priv *il, const u8 sta_id, const u8 * addr)
2158 {
2159 unsigned long flags;
2160
2161 if (!il_is_ready(il)) {
2162 D_INFO("Unable to remove station %pM, device not ready.\n",
2163 addr);
2164 /*
2165 * It is typical for stations to be removed when we are
2166 * going down. Return success since device will be down
2167 * soon anyway
2168 */
2169 return 0;
2170 }
2171
2172 D_ASSOC("Removing STA from driver:%d %pM\n", sta_id, addr);
2173
2174 if (WARN_ON(sta_id == IL_INVALID_STATION))
2175 return -EINVAL;
2176
2177 spin_lock_irqsave(&il->sta_lock, flags);
2178
2179 if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2180 D_INFO("Removing %pM but non DRIVER active\n", addr);
2181 goto out_err;
2182 }
2183
2184 if (!(il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2185 D_INFO("Removing %pM but non UCODE active\n", addr);
2186 goto out_err;
2187 }
2188
2189 if (il->stations[sta_id].used & IL_STA_LOCAL) {
2190 kfree(il->stations[sta_id].lq);
2191 il->stations[sta_id].lq = NULL;
2192 }
2193
2194 il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2195
2196 il->num_stations--;
2197
2198 BUG_ON(il->num_stations < 0);
2199
2200 spin_unlock_irqrestore(&il->sta_lock, flags);
2201
2202 return il_send_remove_station(il, addr, sta_id, false);
2203 out_err:
2204 spin_unlock_irqrestore(&il->sta_lock, flags);
2205 return -EINVAL;
2206 }
2207 EXPORT_SYMBOL_GPL(il_remove_station);
2208
2209 /**
2210 * il_clear_ucode_stations - clear ucode station table bits
2211 *
2212 * This function clears all the bits in the driver indicating
2213 * which stations are active in the ucode. Call when something
2214 * other than explicit station management would cause this in
2215 * the ucode, e.g. unassociated RXON.
2216 */
2217 void
2218 il_clear_ucode_stations(struct il_priv *il)
2219 {
2220 int i;
2221 unsigned long flags_spin;
2222 bool cleared = false;
2223
2224 D_INFO("Clearing ucode stations in driver\n");
2225
2226 spin_lock_irqsave(&il->sta_lock, flags_spin);
2227 for (i = 0; i < il->hw_params.max_stations; i++) {
2228 if (il->stations[i].used & IL_STA_UCODE_ACTIVE) {
2229 D_INFO("Clearing ucode active for station %d\n", i);
2230 il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2231 cleared = true;
2232 }
2233 }
2234 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2235
2236 if (!cleared)
2237 D_INFO("No active stations found to be cleared\n");
2238 }
2239 EXPORT_SYMBOL(il_clear_ucode_stations);
2240
2241 /**
2242 * il_restore_stations() - Restore driver known stations to device
2243 *
2244 * All stations considered active by driver, but not present in ucode, is
2245 * restored.
2246 *
2247 * Function sleeps.
2248 */
2249 void
2250 il_restore_stations(struct il_priv *il)
2251 {
2252 struct il_addsta_cmd sta_cmd;
2253 struct il_link_quality_cmd lq;
2254 unsigned long flags_spin;
2255 int i;
2256 bool found = false;
2257 int ret;
2258 bool send_lq;
2259
2260 if (!il_is_ready(il)) {
2261 D_INFO("Not ready yet, not restoring any stations.\n");
2262 return;
2263 }
2264
2265 D_ASSOC("Restoring all known stations ... start.\n");
2266 spin_lock_irqsave(&il->sta_lock, flags_spin);
2267 for (i = 0; i < il->hw_params.max_stations; i++) {
2268 if ((il->stations[i].used & IL_STA_DRIVER_ACTIVE) &&
2269 !(il->stations[i].used & IL_STA_UCODE_ACTIVE)) {
2270 D_ASSOC("Restoring sta %pM\n",
2271 il->stations[i].sta.sta.addr);
2272 il->stations[i].sta.mode = 0;
2273 il->stations[i].used |= IL_STA_UCODE_INPROGRESS;
2274 found = true;
2275 }
2276 }
2277
2278 for (i = 0; i < il->hw_params.max_stations; i++) {
2279 if ((il->stations[i].used & IL_STA_UCODE_INPROGRESS)) {
2280 memcpy(&sta_cmd, &il->stations[i].sta,
2281 sizeof(struct il_addsta_cmd));
2282 send_lq = false;
2283 if (il->stations[i].lq) {
2284 memcpy(&lq, il->stations[i].lq,
2285 sizeof(struct il_link_quality_cmd));
2286 send_lq = true;
2287 }
2288 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2289 ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2290 if (ret) {
2291 spin_lock_irqsave(&il->sta_lock, flags_spin);
2292 IL_ERR("Adding station %pM failed.\n",
2293 il->stations[i].sta.sta.addr);
2294 il->stations[i].used &= ~IL_STA_DRIVER_ACTIVE;
2295 il->stations[i].used &=
2296 ~IL_STA_UCODE_INPROGRESS;
2297 spin_unlock_irqrestore(&il->sta_lock,
2298 flags_spin);
2299 }
2300 /*
2301 * Rate scaling has already been initialized, send
2302 * current LQ command
2303 */
2304 if (send_lq)
2305 il_send_lq_cmd(il, &lq, CMD_SYNC, true);
2306 spin_lock_irqsave(&il->sta_lock, flags_spin);
2307 il->stations[i].used &= ~IL_STA_UCODE_INPROGRESS;
2308 }
2309 }
2310
2311 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2312 if (!found)
2313 D_INFO("Restoring all known stations"
2314 " .... no stations to be restored.\n");
2315 else
2316 D_INFO("Restoring all known stations" " .... complete.\n");
2317 }
2318 EXPORT_SYMBOL(il_restore_stations);
2319
2320 int
2321 il_get_free_ucode_key_idx(struct il_priv *il)
2322 {
2323 int i;
2324
2325 for (i = 0; i < il->sta_key_max_num; i++)
2326 if (!test_and_set_bit(i, &il->ucode_key_table))
2327 return i;
2328
2329 return WEP_INVALID_OFFSET;
2330 }
2331 EXPORT_SYMBOL(il_get_free_ucode_key_idx);
2332
2333 void
2334 il_dealloc_bcast_stations(struct il_priv *il)
2335 {
2336 unsigned long flags;
2337 int i;
2338
2339 spin_lock_irqsave(&il->sta_lock, flags);
2340 for (i = 0; i < il->hw_params.max_stations; i++) {
2341 if (!(il->stations[i].used & IL_STA_BCAST))
2342 continue;
2343
2344 il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2345 il->num_stations--;
2346 BUG_ON(il->num_stations < 0);
2347 kfree(il->stations[i].lq);
2348 il->stations[i].lq = NULL;
2349 }
2350 spin_unlock_irqrestore(&il->sta_lock, flags);
2351 }
2352 EXPORT_SYMBOL_GPL(il_dealloc_bcast_stations);
2353
2354 #ifdef CONFIG_IWLEGACY_DEBUG
2355 static void
2356 il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq)
2357 {
2358 int i;
2359 D_RATE("lq station id 0x%x\n", lq->sta_id);
2360 D_RATE("lq ant 0x%X 0x%X\n", lq->general_params.single_stream_ant_msk,
2361 lq->general_params.dual_stream_ant_msk);
2362
2363 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
2364 D_RATE("lq idx %d 0x%X\n", i, lq->rs_table[i].rate_n_flags);
2365 }
2366 #else
2367 static inline void
2368 il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq)
2369 {
2370 }
2371 #endif
2372
2373 /**
2374 * il_is_lq_table_valid() - Test one aspect of LQ cmd for validity
2375 *
2376 * It sometimes happens when a HT rate has been in use and we
2377 * loose connectivity with AP then mac80211 will first tell us that the
2378 * current channel is not HT anymore before removing the station. In such a
2379 * scenario the RXON flags will be updated to indicate we are not
2380 * communicating HT anymore, but the LQ command may still contain HT rates.
2381 * Test for this to prevent driver from sending LQ command between the time
2382 * RXON flags are updated and when LQ command is updated.
2383 */
2384 static bool
2385 il_is_lq_table_valid(struct il_priv *il, struct il_link_quality_cmd *lq)
2386 {
2387 int i;
2388
2389 if (il->ht.enabled)
2390 return true;
2391
2392 D_INFO("Channel %u is not an HT channel\n", il->active.channel);
2393 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
2394 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & RATE_MCS_HT_MSK) {
2395 D_INFO("idx %d of LQ expects HT channel\n", i);
2396 return false;
2397 }
2398 }
2399 return true;
2400 }
2401
2402 /**
2403 * il_send_lq_cmd() - Send link quality command
2404 * @init: This command is sent as part of station initialization right
2405 * after station has been added.
2406 *
2407 * The link quality command is sent as the last step of station creation.
2408 * This is the special case in which init is set and we call a callback in
2409 * this case to clear the state indicating that station creation is in
2410 * progress.
2411 */
2412 int
2413 il_send_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq,
2414 u8 flags, bool init)
2415 {
2416 int ret = 0;
2417 unsigned long flags_spin;
2418
2419 struct il_host_cmd cmd = {
2420 .id = C_TX_LINK_QUALITY_CMD,
2421 .len = sizeof(struct il_link_quality_cmd),
2422 .flags = flags,
2423 .data = lq,
2424 };
2425
2426 if (WARN_ON(lq->sta_id == IL_INVALID_STATION))
2427 return -EINVAL;
2428
2429 spin_lock_irqsave(&il->sta_lock, flags_spin);
2430 if (!(il->stations[lq->sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2431 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2432 return -EINVAL;
2433 }
2434 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2435
2436 il_dump_lq_cmd(il, lq);
2437 BUG_ON(init && (cmd.flags & CMD_ASYNC));
2438
2439 if (il_is_lq_table_valid(il, lq))
2440 ret = il_send_cmd(il, &cmd);
2441 else
2442 ret = -EINVAL;
2443
2444 if (cmd.flags & CMD_ASYNC)
2445 return ret;
2446
2447 if (init) {
2448 D_INFO("init LQ command complete,"
2449 " clearing sta addition status for sta %d\n",
2450 lq->sta_id);
2451 spin_lock_irqsave(&il->sta_lock, flags_spin);
2452 il->stations[lq->sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2453 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2454 }
2455 return ret;
2456 }
2457 EXPORT_SYMBOL(il_send_lq_cmd);
2458
2459 int
2460 il_mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2461 struct ieee80211_sta *sta)
2462 {
2463 struct il_priv *il = hw->priv;
2464 struct il_station_priv_common *sta_common = (void *)sta->drv_priv;
2465 int ret;
2466
2467 mutex_lock(&il->mutex);
2468 D_MAC80211("enter station %pM\n", sta->addr);
2469
2470 ret = il_remove_station(il, sta_common->sta_id, sta->addr);
2471 if (ret)
2472 IL_ERR("Error removing station %pM\n", sta->addr);
2473
2474 D_MAC80211("leave ret %d\n", ret);
2475 mutex_unlock(&il->mutex);
2476
2477 return ret;
2478 }
2479 EXPORT_SYMBOL(il_mac_sta_remove);
2480
2481 /************************** RX-FUNCTIONS ****************************/
2482 /*
2483 * Rx theory of operation
2484 *
2485 * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
2486 * each of which point to Receive Buffers to be filled by the NIC. These get
2487 * used not only for Rx frames, but for any command response or notification
2488 * from the NIC. The driver and NIC manage the Rx buffers by means
2489 * of idxes into the circular buffer.
2490 *
2491 * Rx Queue Indexes
2492 * The host/firmware share two idx registers for managing the Rx buffers.
2493 *
2494 * The READ idx maps to the first position that the firmware may be writing
2495 * to -- the driver can read up to (but not including) this position and get
2496 * good data.
2497 * The READ idx is managed by the firmware once the card is enabled.
2498 *
2499 * The WRITE idx maps to the last position the driver has read from -- the
2500 * position preceding WRITE is the last slot the firmware can place a packet.
2501 *
2502 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
2503 * WRITE = READ.
2504 *
2505 * During initialization, the host sets up the READ queue position to the first
2506 * IDX position, and WRITE to the last (READ - 1 wrapped)
2507 *
2508 * When the firmware places a packet in a buffer, it will advance the READ idx
2509 * and fire the RX interrupt. The driver can then query the READ idx and
2510 * process as many packets as possible, moving the WRITE idx forward as it
2511 * resets the Rx queue buffers with new memory.
2512 *
2513 * The management in the driver is as follows:
2514 * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When
2515 * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
2516 * to replenish the iwl->rxq->rx_free.
2517 * + In il_rx_replenish (scheduled) if 'processed' != 'read' then the
2518 * iwl->rxq is replenished and the READ IDX is updated (updating the
2519 * 'processed' and 'read' driver idxes as well)
2520 * + A received packet is processed and handed to the kernel network stack,
2521 * detached from the iwl->rxq. The driver 'processed' idx is updated.
2522 * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
2523 * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
2524 * IDX is not incremented and iwl->status(RX_STALLED) is set. If there
2525 * were enough free buffers and RX_STALLED is set it is cleared.
2526 *
2527 *
2528 * Driver sequence:
2529 *
2530 * il_rx_queue_alloc() Allocates rx_free
2531 * il_rx_replenish() Replenishes rx_free list from rx_used, and calls
2532 * il_rx_queue_restock
2533 * il_rx_queue_restock() Moves available buffers from rx_free into Rx
2534 * queue, updates firmware pointers, and updates
2535 * the WRITE idx. If insufficient rx_free buffers
2536 * are available, schedules il_rx_replenish
2537 *
2538 * -- enable interrupts --
2539 * ISR - il_rx() Detach il_rx_bufs from pool up to the
2540 * READ IDX, detaching the SKB from the pool.
2541 * Moves the packet buffer from queue to rx_used.
2542 * Calls il_rx_queue_restock to refill any empty
2543 * slots.
2544 * ...
2545 *
2546 */
2547
2548 /**
2549 * il_rx_queue_space - Return number of free slots available in queue.
2550 */
2551 int
2552 il_rx_queue_space(const struct il_rx_queue *q)
2553 {
2554 int s = q->read - q->write;
2555 if (s <= 0)
2556 s += RX_QUEUE_SIZE;
2557 /* keep some buffer to not confuse full and empty queue */
2558 s -= 2;
2559 if (s < 0)
2560 s = 0;
2561 return s;
2562 }
2563 EXPORT_SYMBOL(il_rx_queue_space);
2564
2565 /**
2566 * il_rx_queue_update_write_ptr - Update the write pointer for the RX queue
2567 */
2568 void
2569 il_rx_queue_update_write_ptr(struct il_priv *il, struct il_rx_queue *q)
2570 {
2571 unsigned long flags;
2572 u32 rx_wrt_ptr_reg = il->hw_params.rx_wrt_ptr_reg;
2573 u32 reg;
2574
2575 spin_lock_irqsave(&q->lock, flags);
2576
2577 if (q->need_update == 0)
2578 goto exit_unlock;
2579
2580 /* If power-saving is in use, make sure device is awake */
2581 if (test_bit(S_POWER_PMI, &il->status)) {
2582 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2583
2584 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2585 D_INFO("Rx queue requesting wakeup," " GP1 = 0x%x\n",
2586 reg);
2587 il_set_bit(il, CSR_GP_CNTRL,
2588 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2589 goto exit_unlock;
2590 }
2591
2592 q->write_actual = (q->write & ~0x7);
2593 il_wr(il, rx_wrt_ptr_reg, q->write_actual);
2594
2595 /* Else device is assumed to be awake */
2596 } else {
2597 /* Device expects a multiple of 8 */
2598 q->write_actual = (q->write & ~0x7);
2599 il_wr(il, rx_wrt_ptr_reg, q->write_actual);
2600 }
2601
2602 q->need_update = 0;
2603
2604 exit_unlock:
2605 spin_unlock_irqrestore(&q->lock, flags);
2606 }
2607 EXPORT_SYMBOL(il_rx_queue_update_write_ptr);
2608
2609 int
2610 il_rx_queue_alloc(struct il_priv *il)
2611 {
2612 struct il_rx_queue *rxq = &il->rxq;
2613 struct device *dev = &il->pci_dev->dev;
2614 int i;
2615
2616 spin_lock_init(&rxq->lock);
2617 INIT_LIST_HEAD(&rxq->rx_free);
2618 INIT_LIST_HEAD(&rxq->rx_used);
2619
2620 /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
2621 rxq->bd = dma_alloc_coherent(dev, 4 * RX_QUEUE_SIZE, &rxq->bd_dma,
2622 GFP_KERNEL);
2623 if (!rxq->bd)
2624 goto err_bd;
2625
2626 rxq->rb_stts = dma_alloc_coherent(dev, sizeof(struct il_rb_status),
2627 &rxq->rb_stts_dma, GFP_KERNEL);
2628 if (!rxq->rb_stts)
2629 goto err_rb;
2630
2631 /* Fill the rx_used queue with _all_ of the Rx buffers */
2632 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
2633 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
2634
2635 /* Set us so that we have processed and used all buffers, but have
2636 * not restocked the Rx queue with fresh buffers */
2637 rxq->read = rxq->write = 0;
2638 rxq->write_actual = 0;
2639 rxq->free_count = 0;
2640 rxq->need_update = 0;
2641 return 0;
2642
2643 err_rb:
2644 dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
2645 rxq->bd_dma);
2646 err_bd:
2647 return -ENOMEM;
2648 }
2649 EXPORT_SYMBOL(il_rx_queue_alloc);
2650
2651 void
2652 il_hdl_spectrum_measurement(struct il_priv *il, struct il_rx_buf *rxb)
2653 {
2654 struct il_rx_pkt *pkt = rxb_addr(rxb);
2655 struct il_spectrum_notification *report = &(pkt->u.spectrum_notif);
2656
2657 if (!report->state) {
2658 D_11H("Spectrum Measure Notification: Start\n");
2659 return;
2660 }
2661
2662 memcpy(&il->measure_report, report, sizeof(*report));
2663 il->measurement_status |= MEASUREMENT_READY;
2664 }
2665 EXPORT_SYMBOL(il_hdl_spectrum_measurement);
2666
2667 /*
2668 * returns non-zero if packet should be dropped
2669 */
2670 int
2671 il_set_decrypted_flag(struct il_priv *il, struct ieee80211_hdr *hdr,
2672 u32 decrypt_res, struct ieee80211_rx_status *stats)
2673 {
2674 u16 fc = le16_to_cpu(hdr->frame_control);
2675
2676 /*
2677 * All contexts have the same setting here due to it being
2678 * a module parameter, so OK to check any context.
2679 */
2680 if (il->active.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2681 return 0;
2682
2683 if (!(fc & IEEE80211_FCTL_PROTECTED))
2684 return 0;
2685
2686 D_RX("decrypt_res:0x%x\n", decrypt_res);
2687 switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2688 case RX_RES_STATUS_SEC_TYPE_TKIP:
2689 /* The uCode has got a bad phase 1 Key, pushes the packet.
2690 * Decryption will be done in SW. */
2691 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2692 RX_RES_STATUS_BAD_KEY_TTAK)
2693 break;
2694
2695 case RX_RES_STATUS_SEC_TYPE_WEP:
2696 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2697 RX_RES_STATUS_BAD_ICV_MIC) {
2698 /* bad ICV, the packet is destroyed since the
2699 * decryption is inplace, drop it */
2700 D_RX("Packet destroyed\n");
2701 return -1;
2702 }
2703 case RX_RES_STATUS_SEC_TYPE_CCMP:
2704 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2705 RX_RES_STATUS_DECRYPT_OK) {
2706 D_RX("hw decrypt successfully!!!\n");
2707 stats->flag |= RX_FLAG_DECRYPTED;
2708 }
2709 break;
2710
2711 default:
2712 break;
2713 }
2714 return 0;
2715 }
2716 EXPORT_SYMBOL(il_set_decrypted_flag);
2717
2718 /**
2719 * il_txq_update_write_ptr - Send new write idx to hardware
2720 */
2721 void
2722 il_txq_update_write_ptr(struct il_priv *il, struct il_tx_queue *txq)
2723 {
2724 u32 reg = 0;
2725 int txq_id = txq->q.id;
2726
2727 if (txq->need_update == 0)
2728 return;
2729
2730 /* if we're trying to save power */
2731 if (test_bit(S_POWER_PMI, &il->status)) {
2732 /* wake up nic if it's powered down ...
2733 * uCode will wake up, and interrupt us again, so next
2734 * time we'll skip this part. */
2735 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2736
2737 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2738 D_INFO("Tx queue %d requesting wakeup," " GP1 = 0x%x\n",
2739 txq_id, reg);
2740 il_set_bit(il, CSR_GP_CNTRL,
2741 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2742 return;
2743 }
2744
2745 il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8));
2746
2747 /*
2748 * else not in power-save mode,
2749 * uCode will never sleep when we're
2750 * trying to tx (during RFKILL, we're not trying to tx).
2751 */
2752 } else
2753 _il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8));
2754 txq->need_update = 0;
2755 }
2756 EXPORT_SYMBOL(il_txq_update_write_ptr);
2757
2758 /**
2759 * il_tx_queue_unmap - Unmap any remaining DMA mappings and free skb's
2760 */
2761 void
2762 il_tx_queue_unmap(struct il_priv *il, int txq_id)
2763 {
2764 struct il_tx_queue *txq = &il->txq[txq_id];
2765 struct il_queue *q = &txq->q;
2766
2767 if (q->n_bd == 0)
2768 return;
2769
2770 while (q->write_ptr != q->read_ptr) {
2771 il->ops->txq_free_tfd(il, txq);
2772 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2773 }
2774 }
2775 EXPORT_SYMBOL(il_tx_queue_unmap);
2776
2777 /**
2778 * il_tx_queue_free - Deallocate DMA queue.
2779 * @txq: Transmit queue to deallocate.
2780 *
2781 * Empty queue by removing and destroying all BD's.
2782 * Free all buffers.
2783 * 0-fill, but do not free "txq" descriptor structure.
2784 */
2785 void
2786 il_tx_queue_free(struct il_priv *il, int txq_id)
2787 {
2788 struct il_tx_queue *txq = &il->txq[txq_id];
2789 struct device *dev = &il->pci_dev->dev;
2790 int i;
2791
2792 il_tx_queue_unmap(il, txq_id);
2793
2794 /* De-alloc array of command/tx buffers */
2795 if (txq->cmd) {
2796 for (i = 0; i < TFD_TX_CMD_SLOTS; i++)
2797 kfree(txq->cmd[i]);
2798 }
2799
2800 /* De-alloc circular buffer of TFDs */
2801 if (txq->q.n_bd)
2802 dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2803 txq->tfds, txq->q.dma_addr);
2804
2805 /* De-alloc array of per-TFD driver data */
2806 kfree(txq->skbs);
2807 txq->skbs = NULL;
2808
2809 /* deallocate arrays */
2810 kfree(txq->cmd);
2811 kfree(txq->meta);
2812 txq->cmd = NULL;
2813 txq->meta = NULL;
2814
2815 /* 0-fill queue descriptor structure */
2816 memset(txq, 0, sizeof(*txq));
2817 }
2818 EXPORT_SYMBOL(il_tx_queue_free);
2819
2820 /**
2821 * il_cmd_queue_unmap - Unmap any remaining DMA mappings from command queue
2822 */
2823 void
2824 il_cmd_queue_unmap(struct il_priv *il)
2825 {
2826 struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2827 struct il_queue *q = &txq->q;
2828 int i;
2829
2830 if (q->n_bd == 0)
2831 return;
2832
2833 while (q->read_ptr != q->write_ptr) {
2834 i = il_get_cmd_idx(q, q->read_ptr, 0);
2835
2836 if (txq->meta[i].flags & CMD_MAPPED) {
2837 pci_unmap_single(il->pci_dev,
2838 dma_unmap_addr(&txq->meta[i], mapping),
2839 dma_unmap_len(&txq->meta[i], len),
2840 PCI_DMA_BIDIRECTIONAL);
2841 txq->meta[i].flags = 0;
2842 }
2843
2844 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2845 }
2846
2847 i = q->n_win;
2848 if (txq->meta[i].flags & CMD_MAPPED) {
2849 pci_unmap_single(il->pci_dev,
2850 dma_unmap_addr(&txq->meta[i], mapping),
2851 dma_unmap_len(&txq->meta[i], len),
2852 PCI_DMA_BIDIRECTIONAL);
2853 txq->meta[i].flags = 0;
2854 }
2855 }
2856 EXPORT_SYMBOL(il_cmd_queue_unmap);
2857
2858 /**
2859 * il_cmd_queue_free - Deallocate DMA queue.
2860 * @txq: Transmit queue to deallocate.
2861 *
2862 * Empty queue by removing and destroying all BD's.
2863 * Free all buffers.
2864 * 0-fill, but do not free "txq" descriptor structure.
2865 */
2866 void
2867 il_cmd_queue_free(struct il_priv *il)
2868 {
2869 struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2870 struct device *dev = &il->pci_dev->dev;
2871 int i;
2872
2873 il_cmd_queue_unmap(il);
2874
2875 /* De-alloc array of command/tx buffers */
2876 if (txq->cmd) {
2877 for (i = 0; i <= TFD_CMD_SLOTS; i++)
2878 kfree(txq->cmd[i]);
2879 }
2880
2881 /* De-alloc circular buffer of TFDs */
2882 if (txq->q.n_bd)
2883 dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2884 txq->tfds, txq->q.dma_addr);
2885
2886 /* deallocate arrays */
2887 kfree(txq->cmd);
2888 kfree(txq->meta);
2889 txq->cmd = NULL;
2890 txq->meta = NULL;
2891
2892 /* 0-fill queue descriptor structure */
2893 memset(txq, 0, sizeof(*txq));
2894 }
2895 EXPORT_SYMBOL(il_cmd_queue_free);
2896
2897 /*************** DMA-QUEUE-GENERAL-FUNCTIONS *****
2898 * DMA services
2899 *
2900 * Theory of operation
2901 *
2902 * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
2903 * of buffer descriptors, each of which points to one or more data buffers for
2904 * the device to read from or fill. Driver and device exchange status of each
2905 * queue via "read" and "write" pointers. Driver keeps minimum of 2 empty
2906 * entries in each circular buffer, to protect against confusing empty and full
2907 * queue states.
2908 *
2909 * The device reads or writes the data in the queues via the device's several
2910 * DMA/FIFO channels. Each queue is mapped to a single DMA channel.
2911 *
2912 * For Tx queue, there are low mark and high mark limits. If, after queuing
2913 * the packet for Tx, free space become < low mark, Tx queue stopped. When
2914 * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
2915 * Tx queue resumed.
2916 *
2917 * See more detailed info in 4965.h.
2918 ***************************************************/
2919
2920 int
2921 il_queue_space(const struct il_queue *q)
2922 {
2923 int s = q->read_ptr - q->write_ptr;
2924
2925 if (q->read_ptr > q->write_ptr)
2926 s -= q->n_bd;
2927
2928 if (s <= 0)
2929 s += q->n_win;
2930 /* keep some reserve to not confuse empty and full situations */
2931 s -= 2;
2932 if (s < 0)
2933 s = 0;
2934 return s;
2935 }
2936 EXPORT_SYMBOL(il_queue_space);
2937
2938
2939 /**
2940 * il_queue_init - Initialize queue's high/low-water and read/write idxes
2941 */
2942 static int
2943 il_queue_init(struct il_priv *il, struct il_queue *q, int slots, u32 id)
2944 {
2945 /*
2946 * TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
2947 * il_queue_inc_wrap and il_queue_dec_wrap are broken.
2948 */
2949 BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
2950 /* FIXME: remove q->n_bd */
2951 q->n_bd = TFD_QUEUE_SIZE_MAX;
2952
2953 q->n_win = slots;
2954 q->id = id;
2955
2956 /* slots_must be power-of-two size, otherwise
2957 * il_get_cmd_idx is broken. */
2958 BUG_ON(!is_power_of_2(slots));
2959
2960 q->low_mark = q->n_win / 4;
2961 if (q->low_mark < 4)
2962 q->low_mark = 4;
2963
2964 q->high_mark = q->n_win / 8;
2965 if (q->high_mark < 2)
2966 q->high_mark = 2;
2967
2968 q->write_ptr = q->read_ptr = 0;
2969
2970 return 0;
2971 }
2972
2973 /**
2974 * il_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
2975 */
2976 static int
2977 il_tx_queue_alloc(struct il_priv *il, struct il_tx_queue *txq, u32 id)
2978 {
2979 struct device *dev = &il->pci_dev->dev;
2980 size_t tfd_sz = il->hw_params.tfd_size * TFD_QUEUE_SIZE_MAX;
2981
2982 /* Driver ilate data, only for Tx (not command) queues,
2983 * not shared with device. */
2984 if (id != il->cmd_queue) {
2985 txq->skbs = kcalloc(TFD_QUEUE_SIZE_MAX,
2986 sizeof(struct sk_buff *),
2987 GFP_KERNEL);
2988 if (!txq->skbs) {
2989 IL_ERR("Fail to alloc skbs\n");
2990 goto error;
2991 }
2992 } else
2993 txq->skbs = NULL;
2994
2995 /* Circular buffer of transmit frame descriptors (TFDs),
2996 * shared with device */
2997 txq->tfds =
2998 dma_alloc_coherent(dev, tfd_sz, &txq->q.dma_addr, GFP_KERNEL);
2999 if (!txq->tfds)
3000 goto error;
3001
3002 txq->q.id = id;
3003
3004 return 0;
3005
3006 error:
3007 kfree(txq->skbs);
3008 txq->skbs = NULL;
3009
3010 return -ENOMEM;
3011 }
3012
3013 /**
3014 * il_tx_queue_init - Allocate and initialize one tx/cmd queue
3015 */
3016 int
3017 il_tx_queue_init(struct il_priv *il, u32 txq_id)
3018 {
3019 int i, len, ret;
3020 int slots, actual_slots;
3021 struct il_tx_queue *txq = &il->txq[txq_id];
3022
3023 /*
3024 * Alloc buffer array for commands (Tx or other types of commands).
3025 * For the command queue (#4/#9), allocate command space + one big
3026 * command for scan, since scan command is very huge; the system will
3027 * not have two scans at the same time, so only one is needed.
3028 * For normal Tx queues (all other queues), no super-size command
3029 * space is needed.
3030 */
3031 if (txq_id == il->cmd_queue) {
3032 slots = TFD_CMD_SLOTS;
3033 actual_slots = slots + 1;
3034 } else {
3035 slots = TFD_TX_CMD_SLOTS;
3036 actual_slots = slots;
3037 }
3038
3039 txq->meta =
3040 kzalloc(sizeof(struct il_cmd_meta) * actual_slots, GFP_KERNEL);
3041 txq->cmd =
3042 kzalloc(sizeof(struct il_device_cmd *) * actual_slots, GFP_KERNEL);
3043
3044 if (!txq->meta || !txq->cmd)
3045 goto out_free_arrays;
3046
3047 len = sizeof(struct il_device_cmd);
3048 for (i = 0; i < actual_slots; i++) {
3049 /* only happens for cmd queue */
3050 if (i == slots)
3051 len = IL_MAX_CMD_SIZE;
3052
3053 txq->cmd[i] = kmalloc(len, GFP_KERNEL);
3054 if (!txq->cmd[i])
3055 goto err;
3056 }
3057
3058 /* Alloc driver data array and TFD circular buffer */
3059 ret = il_tx_queue_alloc(il, txq, txq_id);
3060 if (ret)
3061 goto err;
3062
3063 txq->need_update = 0;
3064
3065 /*
3066 * For the default queues 0-3, set up the swq_id
3067 * already -- all others need to get one later
3068 * (if they need one at all).
3069 */
3070 if (txq_id < 4)
3071 il_set_swq_id(txq, txq_id, txq_id);
3072
3073 /* Initialize queue's high/low-water marks, and head/tail idxes */
3074 il_queue_init(il, &txq->q, slots, txq_id);
3075
3076 /* Tell device where to find queue */
3077 il->ops->txq_init(il, txq);
3078
3079 return 0;
3080 err:
3081 for (i = 0; i < actual_slots; i++)
3082 kfree(txq->cmd[i]);
3083 out_free_arrays:
3084 kfree(txq->meta);
3085 txq->meta = NULL;
3086 kfree(txq->cmd);
3087 txq->cmd = NULL;
3088
3089 return -ENOMEM;
3090 }
3091 EXPORT_SYMBOL(il_tx_queue_init);
3092
3093 void
3094 il_tx_queue_reset(struct il_priv *il, u32 txq_id)
3095 {
3096 int slots, actual_slots;
3097 struct il_tx_queue *txq = &il->txq[txq_id];
3098
3099 if (txq_id == il->cmd_queue) {
3100 slots = TFD_CMD_SLOTS;
3101 actual_slots = TFD_CMD_SLOTS + 1;
3102 } else {
3103 slots = TFD_TX_CMD_SLOTS;
3104 actual_slots = TFD_TX_CMD_SLOTS;
3105 }
3106
3107 memset(txq->meta, 0, sizeof(struct il_cmd_meta) * actual_slots);
3108 txq->need_update = 0;
3109
3110 /* Initialize queue's high/low-water marks, and head/tail idxes */
3111 il_queue_init(il, &txq->q, slots, txq_id);
3112
3113 /* Tell device where to find queue */
3114 il->ops->txq_init(il, txq);
3115 }
3116 EXPORT_SYMBOL(il_tx_queue_reset);
3117
3118 /*************** HOST COMMAND QUEUE FUNCTIONS *****/
3119
3120 /**
3121 * il_enqueue_hcmd - enqueue a uCode command
3122 * @il: device ilate data point
3123 * @cmd: a point to the ucode command structure
3124 *
3125 * The function returns < 0 values to indicate the operation is
3126 * failed. On success, it turns the idx (> 0) of command in the
3127 * command queue.
3128 */
3129 int
3130 il_enqueue_hcmd(struct il_priv *il, struct il_host_cmd *cmd)
3131 {
3132 struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3133 struct il_queue *q = &txq->q;
3134 struct il_device_cmd *out_cmd;
3135 struct il_cmd_meta *out_meta;
3136 dma_addr_t phys_addr;
3137 unsigned long flags;
3138 int len;
3139 u32 idx;
3140 u16 fix_size;
3141
3142 cmd->len = il->ops->get_hcmd_size(cmd->id, cmd->len);
3143 fix_size = (u16) (cmd->len + sizeof(out_cmd->hdr));
3144
3145 /* If any of the command structures end up being larger than
3146 * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
3147 * we will need to increase the size of the TFD entries
3148 * Also, check to see if command buffer should not exceed the size
3149 * of device_cmd and max_cmd_size. */
3150 BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
3151 !(cmd->flags & CMD_SIZE_HUGE));
3152 BUG_ON(fix_size > IL_MAX_CMD_SIZE);
3153
3154 if (il_is_rfkill(il) || il_is_ctkill(il)) {
3155 IL_WARN("Not sending command - %s KILL\n",
3156 il_is_rfkill(il) ? "RF" : "CT");
3157 return -EIO;
3158 }
3159
3160 spin_lock_irqsave(&il->hcmd_lock, flags);
3161
3162 if (il_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) {
3163 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3164
3165 IL_ERR("Restarting adapter due to command queue full\n");
3166 queue_work(il->workqueue, &il->restart);
3167 return -ENOSPC;
3168 }
3169
3170 idx = il_get_cmd_idx(q, q->write_ptr, cmd->flags & CMD_SIZE_HUGE);
3171 out_cmd = txq->cmd[idx];
3172 out_meta = &txq->meta[idx];
3173
3174 if (WARN_ON(out_meta->flags & CMD_MAPPED)) {
3175 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3176 return -ENOSPC;
3177 }
3178
3179 memset(out_meta, 0, sizeof(*out_meta)); /* re-initialize to NULL */
3180 out_meta->flags = cmd->flags | CMD_MAPPED;
3181 if (cmd->flags & CMD_WANT_SKB)
3182 out_meta->source = cmd;
3183 if (cmd->flags & CMD_ASYNC)
3184 out_meta->callback = cmd->callback;
3185
3186 out_cmd->hdr.cmd = cmd->id;
3187 memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
3188
3189 /* At this point, the out_cmd now has all of the incoming cmd
3190 * information */
3191
3192 out_cmd->hdr.flags = 0;
3193 out_cmd->hdr.sequence =
3194 cpu_to_le16(QUEUE_TO_SEQ(il->cmd_queue) | IDX_TO_SEQ(q->write_ptr));
3195 if (cmd->flags & CMD_SIZE_HUGE)
3196 out_cmd->hdr.sequence |= SEQ_HUGE_FRAME;
3197 len = sizeof(struct il_device_cmd);
3198 if (idx == TFD_CMD_SLOTS)
3199 len = IL_MAX_CMD_SIZE;
3200
3201 #ifdef CONFIG_IWLEGACY_DEBUG
3202 switch (out_cmd->hdr.cmd) {
3203 case C_TX_LINK_QUALITY_CMD:
3204 case C_SENSITIVITY:
3205 D_HC_DUMP("Sending command %s (#%x), seq: 0x%04X, "
3206 "%d bytes at %d[%d]:%d\n",
3207 il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3208 le16_to_cpu(out_cmd->hdr.sequence), fix_size,
3209 q->write_ptr, idx, il->cmd_queue);
3210 break;
3211 default:
3212 D_HC("Sending command %s (#%x), seq: 0x%04X, "
3213 "%d bytes at %d[%d]:%d\n",
3214 il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3215 le16_to_cpu(out_cmd->hdr.sequence), fix_size, q->write_ptr,
3216 idx, il->cmd_queue);
3217 }
3218 #endif
3219
3220 phys_addr =
3221 pci_map_single(il->pci_dev, &out_cmd->hdr, fix_size,
3222 PCI_DMA_BIDIRECTIONAL);
3223 if (unlikely(pci_dma_mapping_error(il->pci_dev, phys_addr))) {
3224 idx = -ENOMEM;
3225 goto out;
3226 }
3227 dma_unmap_addr_set(out_meta, mapping, phys_addr);
3228 dma_unmap_len_set(out_meta, len, fix_size);
3229
3230 txq->need_update = 1;
3231
3232 if (il->ops->txq_update_byte_cnt_tbl)
3233 /* Set up entry in queue's byte count circular buffer */
3234 il->ops->txq_update_byte_cnt_tbl(il, txq, 0);
3235
3236 il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, fix_size, 1,
3237 U32_PAD(cmd->len));
3238
3239 /* Increment and update queue's write idx */
3240 q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
3241 il_txq_update_write_ptr(il, txq);
3242
3243 out:
3244 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3245 return idx;
3246 }
3247
3248 /**
3249 * il_hcmd_queue_reclaim - Reclaim TX command queue entries already Tx'd
3250 *
3251 * When FW advances 'R' idx, all entries between old and new 'R' idx
3252 * need to be reclaimed. As result, some free space forms. If there is
3253 * enough free space (> low mark), wake the stack that feeds us.
3254 */
3255 static void
3256 il_hcmd_queue_reclaim(struct il_priv *il, int txq_id, int idx, int cmd_idx)
3257 {
3258 struct il_tx_queue *txq = &il->txq[txq_id];
3259 struct il_queue *q = &txq->q;
3260 int nfreed = 0;
3261
3262 if (idx >= q->n_bd || il_queue_used(q, idx) == 0) {
3263 IL_ERR("Read idx for DMA queue txq id (%d), idx %d, "
3264 "is out of range [0-%d] %d %d.\n", txq_id, idx, q->n_bd,
3265 q->write_ptr, q->read_ptr);
3266 return;
3267 }
3268
3269 for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx;
3270 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3271
3272 if (nfreed++ > 0) {
3273 IL_ERR("HCMD skipped: idx (%d) %d %d\n", idx,
3274 q->write_ptr, q->read_ptr);
3275 queue_work(il->workqueue, &il->restart);
3276 }
3277
3278 }
3279 }
3280
3281 /**
3282 * il_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3283 * @rxb: Rx buffer to reclaim
3284 *
3285 * If an Rx buffer has an async callback associated with it the callback
3286 * will be executed. The attached skb (if present) will only be freed
3287 * if the callback returns 1
3288 */
3289 void
3290 il_tx_cmd_complete(struct il_priv *il, struct il_rx_buf *rxb)
3291 {
3292 struct il_rx_pkt *pkt = rxb_addr(rxb);
3293 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3294 int txq_id = SEQ_TO_QUEUE(sequence);
3295 int idx = SEQ_TO_IDX(sequence);
3296 int cmd_idx;
3297 bool huge = !!(pkt->hdr.sequence & SEQ_HUGE_FRAME);
3298 struct il_device_cmd *cmd;
3299 struct il_cmd_meta *meta;
3300 struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3301 unsigned long flags;
3302
3303 /* If a Tx command is being handled and it isn't in the actual
3304 * command queue then there a command routing bug has been introduced
3305 * in the queue management code. */
3306 if (WARN
3307 (txq_id != il->cmd_queue,
3308 "wrong command queue %d (should be %d), sequence 0x%X readp=%d writep=%d\n",
3309 txq_id, il->cmd_queue, sequence, il->txq[il->cmd_queue].q.read_ptr,
3310 il->txq[il->cmd_queue].q.write_ptr)) {
3311 il_print_hex_error(il, pkt, 32);
3312 return;
3313 }
3314
3315 cmd_idx = il_get_cmd_idx(&txq->q, idx, huge);
3316 cmd = txq->cmd[cmd_idx];
3317 meta = &txq->meta[cmd_idx];
3318
3319 txq->time_stamp = jiffies;
3320
3321 pci_unmap_single(il->pci_dev, dma_unmap_addr(meta, mapping),
3322 dma_unmap_len(meta, len), PCI_DMA_BIDIRECTIONAL);
3323
3324 /* Input error checking is done when commands are added to queue. */
3325 if (meta->flags & CMD_WANT_SKB) {
3326 meta->source->reply_page = (unsigned long)rxb_addr(rxb);
3327 rxb->page = NULL;
3328 } else if (meta->callback)
3329 meta->callback(il, cmd, pkt);
3330
3331 spin_lock_irqsave(&il->hcmd_lock, flags);
3332
3333 il_hcmd_queue_reclaim(il, txq_id, idx, cmd_idx);
3334
3335 if (!(meta->flags & CMD_ASYNC)) {
3336 clear_bit(S_HCMD_ACTIVE, &il->status);
3337 D_INFO("Clearing HCMD_ACTIVE for command %s\n",
3338 il_get_cmd_string(cmd->hdr.cmd));
3339 wake_up(&il->wait_command_queue);
3340 }
3341
3342 /* Mark as unmapped */
3343 meta->flags = 0;
3344
3345 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3346 }
3347 EXPORT_SYMBOL(il_tx_cmd_complete);
3348
3349 MODULE_DESCRIPTION("iwl-legacy: common functions for 3945 and 4965");
3350 MODULE_VERSION(IWLWIFI_VERSION);
3351 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
3352 MODULE_LICENSE("GPL");
3353
3354 /*
3355 * set bt_coex_active to true, uCode will do kill/defer
3356 * every time the priority line is asserted (BT is sending signals on the
3357 * priority line in the PCIx).
3358 * set bt_coex_active to false, uCode will ignore the BT activity and
3359 * perform the normal operation
3360 *
3361 * User might experience transmit issue on some platform due to WiFi/BT
3362 * co-exist problem. The possible behaviors are:
3363 * Able to scan and finding all the available AP
3364 * Not able to associate with any AP
3365 * On those platforms, WiFi communication can be restored by set
3366 * "bt_coex_active" module parameter to "false"
3367 *
3368 * default: bt_coex_active = true (BT_COEX_ENABLE)
3369 */
3370 static bool bt_coex_active = true;
3371 module_param(bt_coex_active, bool, S_IRUGO);
3372 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
3373
3374 u32 il_debug_level;
3375 EXPORT_SYMBOL(il_debug_level);
3376
3377 const u8 il_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
3378 EXPORT_SYMBOL(il_bcast_addr);
3379
3380 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
3381 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
3382 static void
3383 il_init_ht_hw_capab(const struct il_priv *il,
3384 struct ieee80211_sta_ht_cap *ht_info,
3385 enum nl80211_band band)
3386 {
3387 u16 max_bit_rate = 0;
3388 u8 rx_chains_num = il->hw_params.rx_chains_num;
3389 u8 tx_chains_num = il->hw_params.tx_chains_num;
3390
3391 ht_info->cap = 0;
3392 memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
3393
3394 ht_info->ht_supported = true;
3395
3396 ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
3397 max_bit_rate = MAX_BIT_RATE_20_MHZ;
3398 if (il->hw_params.ht40_channel & BIT(band)) {
3399 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
3400 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
3401 ht_info->mcs.rx_mask[4] = 0x01;
3402 max_bit_rate = MAX_BIT_RATE_40_MHZ;
3403 }
3404
3405 if (il->cfg->mod_params->amsdu_size_8K)
3406 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
3407
3408 ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3409 ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3410
3411 ht_info->mcs.rx_mask[0] = 0xFF;
3412 if (rx_chains_num >= 2)
3413 ht_info->mcs.rx_mask[1] = 0xFF;
3414 if (rx_chains_num >= 3)
3415 ht_info->mcs.rx_mask[2] = 0xFF;
3416
3417 /* Highest supported Rx data rate */
3418 max_bit_rate *= rx_chains_num;
3419 WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
3420 ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
3421
3422 /* Tx MCS capabilities */
3423 ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
3424 if (tx_chains_num != rx_chains_num) {
3425 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
3426 ht_info->mcs.tx_params |=
3427 ((tx_chains_num -
3428 1) << IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
3429 }
3430 }
3431
3432 /**
3433 * il_init_geos - Initialize mac80211's geo/channel info based from eeprom
3434 */
3435 int
3436 il_init_geos(struct il_priv *il)
3437 {
3438 struct il_channel_info *ch;
3439 struct ieee80211_supported_band *sband;
3440 struct ieee80211_channel *channels;
3441 struct ieee80211_channel *geo_ch;
3442 struct ieee80211_rate *rates;
3443 int i = 0;
3444 s8 max_tx_power = 0;
3445
3446 if (il->bands[NL80211_BAND_2GHZ].n_bitrates ||
3447 il->bands[NL80211_BAND_5GHZ].n_bitrates) {
3448 D_INFO("Geography modes already initialized.\n");
3449 set_bit(S_GEO_CONFIGURED, &il->status);
3450 return 0;
3451 }
3452
3453 channels =
3454 kzalloc(sizeof(struct ieee80211_channel) * il->channel_count,
3455 GFP_KERNEL);
3456 if (!channels)
3457 return -ENOMEM;
3458
3459 rates =
3460 kzalloc((sizeof(struct ieee80211_rate) * RATE_COUNT_LEGACY),
3461 GFP_KERNEL);
3462 if (!rates) {
3463 kfree(channels);
3464 return -ENOMEM;
3465 }
3466
3467 /* 5.2GHz channels start after the 2.4GHz channels */
3468 sband = &il->bands[NL80211_BAND_5GHZ];
3469 sband->channels = &channels[ARRAY_SIZE(il_eeprom_band_1)];
3470 /* just OFDM */
3471 sband->bitrates = &rates[IL_FIRST_OFDM_RATE];
3472 sband->n_bitrates = RATE_COUNT_LEGACY - IL_FIRST_OFDM_RATE;
3473
3474 if (il->cfg->sku & IL_SKU_N)
3475 il_init_ht_hw_capab(il, &sband->ht_cap, NL80211_BAND_5GHZ);
3476
3477 sband = &il->bands[NL80211_BAND_2GHZ];
3478 sband->channels = channels;
3479 /* OFDM & CCK */
3480 sband->bitrates = rates;
3481 sband->n_bitrates = RATE_COUNT_LEGACY;
3482
3483 if (il->cfg->sku & IL_SKU_N)
3484 il_init_ht_hw_capab(il, &sband->ht_cap, NL80211_BAND_2GHZ);
3485
3486 il->ieee_channels = channels;
3487 il->ieee_rates = rates;
3488
3489 for (i = 0; i < il->channel_count; i++) {
3490 ch = &il->channel_info[i];
3491
3492 if (!il_is_channel_valid(ch))
3493 continue;
3494
3495 sband = &il->bands[ch->band];
3496
3497 geo_ch = &sband->channels[sband->n_channels++];
3498
3499 geo_ch->center_freq =
3500 ieee80211_channel_to_frequency(ch->channel, ch->band);
3501 geo_ch->max_power = ch->max_power_avg;
3502 geo_ch->max_antenna_gain = 0xff;
3503 geo_ch->hw_value = ch->channel;
3504
3505 if (il_is_channel_valid(ch)) {
3506 if (!(ch->flags & EEPROM_CHANNEL_IBSS))
3507 geo_ch->flags |= IEEE80211_CHAN_NO_IR;
3508
3509 if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
3510 geo_ch->flags |= IEEE80211_CHAN_NO_IR;
3511
3512 if (ch->flags & EEPROM_CHANNEL_RADAR)
3513 geo_ch->flags |= IEEE80211_CHAN_RADAR;
3514
3515 geo_ch->flags |= ch->ht40_extension_channel;
3516
3517 if (ch->max_power_avg > max_tx_power)
3518 max_tx_power = ch->max_power_avg;
3519 } else {
3520 geo_ch->flags |= IEEE80211_CHAN_DISABLED;
3521 }
3522
3523 D_INFO("Channel %d Freq=%d[%sGHz] %s flag=0x%X\n", ch->channel,
3524 geo_ch->center_freq,
3525 il_is_channel_a_band(ch) ? "5.2" : "2.4",
3526 geo_ch->
3527 flags & IEEE80211_CHAN_DISABLED ? "restricted" : "valid",
3528 geo_ch->flags);
3529 }
3530
3531 il->tx_power_device_lmt = max_tx_power;
3532 il->tx_power_user_lmt = max_tx_power;
3533 il->tx_power_next = max_tx_power;
3534
3535 if (il->bands[NL80211_BAND_5GHZ].n_channels == 0 &&
3536 (il->cfg->sku & IL_SKU_A)) {
3537 IL_INFO("Incorrectly detected BG card as ABG. "
3538 "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
3539 il->pci_dev->device, il->pci_dev->subsystem_device);
3540 il->cfg->sku &= ~IL_SKU_A;
3541 }
3542
3543 IL_INFO("Tunable channels: %d 802.11bg, %d 802.11a channels\n",
3544 il->bands[NL80211_BAND_2GHZ].n_channels,
3545 il->bands[NL80211_BAND_5GHZ].n_channels);
3546
3547 set_bit(S_GEO_CONFIGURED, &il->status);
3548
3549 return 0;
3550 }
3551 EXPORT_SYMBOL(il_init_geos);
3552
3553 /*
3554 * il_free_geos - undo allocations in il_init_geos
3555 */
3556 void
3557 il_free_geos(struct il_priv *il)
3558 {
3559 kfree(il->ieee_channels);
3560 kfree(il->ieee_rates);
3561 clear_bit(S_GEO_CONFIGURED, &il->status);
3562 }
3563 EXPORT_SYMBOL(il_free_geos);
3564
3565 static bool
3566 il_is_channel_extension(struct il_priv *il, enum nl80211_band band,
3567 u16 channel, u8 extension_chan_offset)
3568 {
3569 const struct il_channel_info *ch_info;
3570
3571 ch_info = il_get_channel_info(il, band, channel);
3572 if (!il_is_channel_valid(ch_info))
3573 return false;
3574
3575 if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
3576 return !(ch_info->
3577 ht40_extension_channel & IEEE80211_CHAN_NO_HT40PLUS);
3578 else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
3579 return !(ch_info->
3580 ht40_extension_channel & IEEE80211_CHAN_NO_HT40MINUS);
3581
3582 return false;
3583 }
3584
3585 bool
3586 il_is_ht40_tx_allowed(struct il_priv *il, struct ieee80211_sta_ht_cap *ht_cap)
3587 {
3588 if (!il->ht.enabled || !il->ht.is_40mhz)
3589 return false;
3590
3591 /*
3592 * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
3593 * the bit will not set if it is pure 40MHz case
3594 */
3595 if (ht_cap && !ht_cap->ht_supported)
3596 return false;
3597
3598 #ifdef CONFIG_IWLEGACY_DEBUGFS
3599 if (il->disable_ht40)
3600 return false;
3601 #endif
3602
3603 return il_is_channel_extension(il, il->band,
3604 le16_to_cpu(il->staging.channel),
3605 il->ht.extension_chan_offset);
3606 }
3607 EXPORT_SYMBOL(il_is_ht40_tx_allowed);
3608
3609 static u16 noinline
3610 il_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
3611 {
3612 u16 new_val;
3613 u16 beacon_factor;
3614
3615 /*
3616 * If mac80211 hasn't given us a beacon interval, program
3617 * the default into the device.
3618 */
3619 if (!beacon_val)
3620 return DEFAULT_BEACON_INTERVAL;
3621
3622 /*
3623 * If the beacon interval we obtained from the peer
3624 * is too large, we'll have to wake up more often
3625 * (and in IBSS case, we'll beacon too much)
3626 *
3627 * For example, if max_beacon_val is 4096, and the
3628 * requested beacon interval is 7000, we'll have to
3629 * use 3500 to be able to wake up on the beacons.
3630 *
3631 * This could badly influence beacon detection stats.
3632 */
3633
3634 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
3635 new_val = beacon_val / beacon_factor;
3636
3637 if (!new_val)
3638 new_val = max_beacon_val;
3639
3640 return new_val;
3641 }
3642
3643 int
3644 il_send_rxon_timing(struct il_priv *il)
3645 {
3646 u64 tsf;
3647 s32 interval_tm, rem;
3648 struct ieee80211_conf *conf = NULL;
3649 u16 beacon_int;
3650 struct ieee80211_vif *vif = il->vif;
3651
3652 conf = &il->hw->conf;
3653
3654 lockdep_assert_held(&il->mutex);
3655
3656 memset(&il->timing, 0, sizeof(struct il_rxon_time_cmd));
3657
3658 il->timing.timestamp = cpu_to_le64(il->timestamp);
3659 il->timing.listen_interval = cpu_to_le16(conf->listen_interval);
3660
3661 beacon_int = vif ? vif->bss_conf.beacon_int : 0;
3662
3663 /*
3664 * TODO: For IBSS we need to get atim_win from mac80211,
3665 * for now just always use 0
3666 */
3667 il->timing.atim_win = 0;
3668
3669 beacon_int =
3670 il_adjust_beacon_interval(beacon_int,
3671 il->hw_params.max_beacon_itrvl *
3672 TIME_UNIT);
3673 il->timing.beacon_interval = cpu_to_le16(beacon_int);
3674
3675 tsf = il->timestamp; /* tsf is modifed by do_div: copy it */
3676 interval_tm = beacon_int * TIME_UNIT;
3677 rem = do_div(tsf, interval_tm);
3678 il->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
3679
3680 il->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ? : 1) : 1;
3681
3682 D_ASSOC("beacon interval %d beacon timer %d beacon tim %d\n",
3683 le16_to_cpu(il->timing.beacon_interval),
3684 le32_to_cpu(il->timing.beacon_init_val),
3685 le16_to_cpu(il->timing.atim_win));
3686
3687 return il_send_cmd_pdu(il, C_RXON_TIMING, sizeof(il->timing),
3688 &il->timing);
3689 }
3690 EXPORT_SYMBOL(il_send_rxon_timing);
3691
3692 void
3693 il_set_rxon_hwcrypto(struct il_priv *il, int hw_decrypt)
3694 {
3695 struct il_rxon_cmd *rxon = &il->staging;
3696
3697 if (hw_decrypt)
3698 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
3699 else
3700 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
3701
3702 }
3703 EXPORT_SYMBOL(il_set_rxon_hwcrypto);
3704
3705 /* validate RXON structure is valid */
3706 int
3707 il_check_rxon_cmd(struct il_priv *il)
3708 {
3709 struct il_rxon_cmd *rxon = &il->staging;
3710 bool error = false;
3711
3712 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
3713 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
3714 IL_WARN("check 2.4G: wrong narrow\n");
3715 error = true;
3716 }
3717 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
3718 IL_WARN("check 2.4G: wrong radar\n");
3719 error = true;
3720 }
3721 } else {
3722 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
3723 IL_WARN("check 5.2G: not short slot!\n");
3724 error = true;
3725 }
3726 if (rxon->flags & RXON_FLG_CCK_MSK) {
3727 IL_WARN("check 5.2G: CCK!\n");
3728 error = true;
3729 }
3730 }
3731 if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
3732 IL_WARN("mac/bssid mcast!\n");
3733 error = true;
3734 }
3735
3736 /* make sure basic rates 6Mbps and 1Mbps are supported */
3737 if ((rxon->ofdm_basic_rates & RATE_6M_MASK) == 0 &&
3738 (rxon->cck_basic_rates & RATE_1M_MASK) == 0) {
3739 IL_WARN("neither 1 nor 6 are basic\n");
3740 error = true;
3741 }
3742
3743 if (le16_to_cpu(rxon->assoc_id) > 2007) {
3744 IL_WARN("aid > 2007\n");
3745 error = true;
3746 }
3747
3748 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) ==
3749 (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
3750 IL_WARN("CCK and short slot\n");
3751 error = true;
3752 }
3753
3754 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) ==
3755 (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
3756 IL_WARN("CCK and auto detect");
3757 error = true;
3758 }
3759
3760 if ((rxon->
3761 flags & (RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK)) ==
3762 RXON_FLG_TGG_PROTECT_MSK) {
3763 IL_WARN("TGg but no auto-detect\n");
3764 error = true;
3765 }
3766
3767 if (error)
3768 IL_WARN("Tuning to channel %d\n", le16_to_cpu(rxon->channel));
3769
3770 if (error) {
3771 IL_ERR("Invalid RXON\n");
3772 return -EINVAL;
3773 }
3774 return 0;
3775 }
3776 EXPORT_SYMBOL(il_check_rxon_cmd);
3777
3778 /**
3779 * il_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
3780 * @il: staging_rxon is compared to active_rxon
3781 *
3782 * If the RXON structure is changing enough to require a new tune,
3783 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
3784 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
3785 */
3786 int
3787 il_full_rxon_required(struct il_priv *il)
3788 {
3789 const struct il_rxon_cmd *staging = &il->staging;
3790 const struct il_rxon_cmd *active = &il->active;
3791
3792 #define CHK(cond) \
3793 if ((cond)) { \
3794 D_INFO("need full RXON - " #cond "\n"); \
3795 return 1; \
3796 }
3797
3798 #define CHK_NEQ(c1, c2) \
3799 if ((c1) != (c2)) { \
3800 D_INFO("need full RXON - " \
3801 #c1 " != " #c2 " - %d != %d\n", \
3802 (c1), (c2)); \
3803 return 1; \
3804 }
3805
3806 /* These items are only settable from the full RXON command */
3807 CHK(!il_is_associated(il));
3808 CHK(!ether_addr_equal_64bits(staging->bssid_addr, active->bssid_addr));
3809 CHK(!ether_addr_equal_64bits(staging->node_addr, active->node_addr));
3810 CHK(!ether_addr_equal_64bits(staging->wlap_bssid_addr,
3811 active->wlap_bssid_addr));
3812 CHK_NEQ(staging->dev_type, active->dev_type);
3813 CHK_NEQ(staging->channel, active->channel);
3814 CHK_NEQ(staging->air_propagation, active->air_propagation);
3815 CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
3816 active->ofdm_ht_single_stream_basic_rates);
3817 CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
3818 active->ofdm_ht_dual_stream_basic_rates);
3819 CHK_NEQ(staging->assoc_id, active->assoc_id);
3820
3821 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
3822 * be updated with the RXON_ASSOC command -- however only some
3823 * flag transitions are allowed using RXON_ASSOC */
3824
3825 /* Check if we are not switching bands */
3826 CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
3827 active->flags & RXON_FLG_BAND_24G_MSK);
3828
3829 /* Check if we are switching association toggle */
3830 CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
3831 active->filter_flags & RXON_FILTER_ASSOC_MSK);
3832
3833 #undef CHK
3834 #undef CHK_NEQ
3835
3836 return 0;
3837 }
3838 EXPORT_SYMBOL(il_full_rxon_required);
3839
3840 u8
3841 il_get_lowest_plcp(struct il_priv *il)
3842 {
3843 /*
3844 * Assign the lowest rate -- should really get this from
3845 * the beacon skb from mac80211.
3846 */
3847 if (il->staging.flags & RXON_FLG_BAND_24G_MSK)
3848 return RATE_1M_PLCP;
3849 else
3850 return RATE_6M_PLCP;
3851 }
3852 EXPORT_SYMBOL(il_get_lowest_plcp);
3853
3854 static void
3855 _il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3856 {
3857 struct il_rxon_cmd *rxon = &il->staging;
3858
3859 if (!il->ht.enabled) {
3860 rxon->flags &=
3861 ~(RXON_FLG_CHANNEL_MODE_MSK |
3862 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK | RXON_FLG_HT40_PROT_MSK
3863 | RXON_FLG_HT_PROT_MSK);
3864 return;
3865 }
3866
3867 rxon->flags |=
3868 cpu_to_le32(il->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
3869
3870 /* Set up channel bandwidth:
3871 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
3872 /* clear the HT channel mode before set the mode */
3873 rxon->flags &=
3874 ~(RXON_FLG_CHANNEL_MODE_MSK | RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3875 if (il_is_ht40_tx_allowed(il, NULL)) {
3876 /* pure ht40 */
3877 if (il->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
3878 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
3879 /* Note: control channel is opposite of extension channel */
3880 switch (il->ht.extension_chan_offset) {
3881 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3882 rxon->flags &=
3883 ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3884 break;
3885 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3886 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3887 break;
3888 }
3889 } else {
3890 /* Note: control channel is opposite of extension channel */
3891 switch (il->ht.extension_chan_offset) {
3892 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3893 rxon->flags &=
3894 ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3895 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3896 break;
3897 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3898 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3899 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3900 break;
3901 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3902 default:
3903 /* channel location only valid if in Mixed mode */
3904 IL_ERR("invalid extension channel offset\n");
3905 break;
3906 }
3907 }
3908 } else {
3909 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
3910 }
3911
3912 if (il->ops->set_rxon_chain)
3913 il->ops->set_rxon_chain(il);
3914
3915 D_ASSOC("rxon flags 0x%X operation mode :0x%X "
3916 "extension channel offset 0x%x\n", le32_to_cpu(rxon->flags),
3917 il->ht.protection, il->ht.extension_chan_offset);
3918 }
3919
3920 void
3921 il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3922 {
3923 _il_set_rxon_ht(il, ht_conf);
3924 }
3925 EXPORT_SYMBOL(il_set_rxon_ht);
3926
3927 /* Return valid, unused, channel for a passive scan to reset the RF */
3928 u8
3929 il_get_single_channel_number(struct il_priv *il, enum nl80211_band band)
3930 {
3931 const struct il_channel_info *ch_info;
3932 int i;
3933 u8 channel = 0;
3934 u8 min, max;
3935
3936 if (band == NL80211_BAND_5GHZ) {
3937 min = 14;
3938 max = il->channel_count;
3939 } else {
3940 min = 0;
3941 max = 14;
3942 }
3943
3944 for (i = min; i < max; i++) {
3945 channel = il->channel_info[i].channel;
3946 if (channel == le16_to_cpu(il->staging.channel))
3947 continue;
3948
3949 ch_info = il_get_channel_info(il, band, channel);
3950 if (il_is_channel_valid(ch_info))
3951 break;
3952 }
3953
3954 return channel;
3955 }
3956 EXPORT_SYMBOL(il_get_single_channel_number);
3957
3958 /**
3959 * il_set_rxon_channel - Set the band and channel values in staging RXON
3960 * @ch: requested channel as a pointer to struct ieee80211_channel
3961
3962 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
3963 * in the staging RXON flag structure based on the ch->band
3964 */
3965 int
3966 il_set_rxon_channel(struct il_priv *il, struct ieee80211_channel *ch)
3967 {
3968 enum nl80211_band band = ch->band;
3969 u16 channel = ch->hw_value;
3970
3971 if (le16_to_cpu(il->staging.channel) == channel && il->band == band)
3972 return 0;
3973
3974 il->staging.channel = cpu_to_le16(channel);
3975 if (band == NL80211_BAND_5GHZ)
3976 il->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
3977 else
3978 il->staging.flags |= RXON_FLG_BAND_24G_MSK;
3979
3980 il->band = band;
3981
3982 D_INFO("Staging channel set to %d [%d]\n", channel, band);
3983
3984 return 0;
3985 }
3986 EXPORT_SYMBOL(il_set_rxon_channel);
3987
3988 void
3989 il_set_flags_for_band(struct il_priv *il, enum nl80211_band band,
3990 struct ieee80211_vif *vif)
3991 {
3992 if (band == NL80211_BAND_5GHZ) {
3993 il->staging.flags &=
3994 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK |
3995 RXON_FLG_CCK_MSK);
3996 il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
3997 } else {
3998 /* Copied from il_post_associate() */
3999 if (vif && vif->bss_conf.use_short_slot)
4000 il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
4001 else
4002 il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
4003
4004 il->staging.flags |= RXON_FLG_BAND_24G_MSK;
4005 il->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
4006 il->staging.flags &= ~RXON_FLG_CCK_MSK;
4007 }
4008 }
4009 EXPORT_SYMBOL(il_set_flags_for_band);
4010
4011 /*
4012 * initialize rxon structure with default values from eeprom
4013 */
4014 void
4015 il_connection_init_rx_config(struct il_priv *il)
4016 {
4017 const struct il_channel_info *ch_info;
4018
4019 memset(&il->staging, 0, sizeof(il->staging));
4020
4021 switch (il->iw_mode) {
4022 case NL80211_IFTYPE_UNSPECIFIED:
4023 il->staging.dev_type = RXON_DEV_TYPE_ESS;
4024 break;
4025 case NL80211_IFTYPE_STATION:
4026 il->staging.dev_type = RXON_DEV_TYPE_ESS;
4027 il->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
4028 break;
4029 case NL80211_IFTYPE_ADHOC:
4030 il->staging.dev_type = RXON_DEV_TYPE_IBSS;
4031 il->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
4032 il->staging.filter_flags =
4033 RXON_FILTER_BCON_AWARE_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
4034 break;
4035 default:
4036 IL_ERR("Unsupported interface type %d\n", il->vif->type);
4037 return;
4038 }
4039
4040 #if 0
4041 /* TODO: Figure out when short_preamble would be set and cache from
4042 * that */
4043 if (!hw_to_local(il->hw)->short_preamble)
4044 il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
4045 else
4046 il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
4047 #endif
4048
4049 ch_info =
4050 il_get_channel_info(il, il->band, le16_to_cpu(il->active.channel));
4051
4052 if (!ch_info)
4053 ch_info = &il->channel_info[0];
4054
4055 il->staging.channel = cpu_to_le16(ch_info->channel);
4056 il->band = ch_info->band;
4057
4058 il_set_flags_for_band(il, il->band, il->vif);
4059
4060 il->staging.ofdm_basic_rates =
4061 (IL_OFDM_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
4062 il->staging.cck_basic_rates =
4063 (IL_CCK_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
4064
4065 /* clear both MIX and PURE40 mode flag */
4066 il->staging.flags &=
4067 ~(RXON_FLG_CHANNEL_MODE_MIXED | RXON_FLG_CHANNEL_MODE_PURE_40);
4068 if (il->vif)
4069 memcpy(il->staging.node_addr, il->vif->addr, ETH_ALEN);
4070
4071 il->staging.ofdm_ht_single_stream_basic_rates = 0xff;
4072 il->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
4073 }
4074 EXPORT_SYMBOL(il_connection_init_rx_config);
4075
4076 void
4077 il_set_rate(struct il_priv *il)
4078 {
4079 const struct ieee80211_supported_band *hw = NULL;
4080 struct ieee80211_rate *rate;
4081 int i;
4082
4083 hw = il_get_hw_mode(il, il->band);
4084 if (!hw) {
4085 IL_ERR("Failed to set rate: unable to get hw mode\n");
4086 return;
4087 }
4088
4089 il->active_rate = 0;
4090
4091 for (i = 0; i < hw->n_bitrates; i++) {
4092 rate = &(hw->bitrates[i]);
4093 if (rate->hw_value < RATE_COUNT_LEGACY)
4094 il->active_rate |= (1 << rate->hw_value);
4095 }
4096
4097 D_RATE("Set active_rate = %0x\n", il->active_rate);
4098
4099 il->staging.cck_basic_rates =
4100 (IL_CCK_BASIC_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
4101
4102 il->staging.ofdm_basic_rates =
4103 (IL_OFDM_BASIC_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
4104 }
4105 EXPORT_SYMBOL(il_set_rate);
4106
4107 void
4108 il_chswitch_done(struct il_priv *il, bool is_success)
4109 {
4110 if (test_bit(S_EXIT_PENDING, &il->status))
4111 return;
4112
4113 if (test_and_clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4114 ieee80211_chswitch_done(il->vif, is_success);
4115 }
4116 EXPORT_SYMBOL(il_chswitch_done);
4117
4118 void
4119 il_hdl_csa(struct il_priv *il, struct il_rx_buf *rxb)
4120 {
4121 struct il_rx_pkt *pkt = rxb_addr(rxb);
4122 struct il_csa_notification *csa = &(pkt->u.csa_notif);
4123 struct il_rxon_cmd *rxon = (void *)&il->active;
4124
4125 if (!test_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4126 return;
4127
4128 if (!le32_to_cpu(csa->status) && csa->channel == il->switch_channel) {
4129 rxon->channel = csa->channel;
4130 il->staging.channel = csa->channel;
4131 D_11H("CSA notif: channel %d\n", le16_to_cpu(csa->channel));
4132 il_chswitch_done(il, true);
4133 } else {
4134 IL_ERR("CSA notif (fail) : channel %d\n",
4135 le16_to_cpu(csa->channel));
4136 il_chswitch_done(il, false);
4137 }
4138 }
4139 EXPORT_SYMBOL(il_hdl_csa);
4140
4141 #ifdef CONFIG_IWLEGACY_DEBUG
4142 void
4143 il_print_rx_config_cmd(struct il_priv *il)
4144 {
4145 struct il_rxon_cmd *rxon = &il->staging;
4146
4147 D_RADIO("RX CONFIG:\n");
4148 il_print_hex_dump(il, IL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4149 D_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4150 D_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4151 D_RADIO("u32 filter_flags: 0x%08x\n", le32_to_cpu(rxon->filter_flags));
4152 D_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4153 D_RADIO("u8 ofdm_basic_rates: 0x%02x\n", rxon->ofdm_basic_rates);
4154 D_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4155 D_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr);
4156 D_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
4157 D_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4158 }
4159 EXPORT_SYMBOL(il_print_rx_config_cmd);
4160 #endif
4161 /**
4162 * il_irq_handle_error - called for HW or SW error interrupt from card
4163 */
4164 void
4165 il_irq_handle_error(struct il_priv *il)
4166 {
4167 /* Set the FW error flag -- cleared on il_down */
4168 set_bit(S_FW_ERROR, &il->status);
4169
4170 /* Cancel currently queued command. */
4171 clear_bit(S_HCMD_ACTIVE, &il->status);
4172
4173 IL_ERR("Loaded firmware version: %s\n", il->hw->wiphy->fw_version);
4174
4175 il->ops->dump_nic_error_log(il);
4176 if (il->ops->dump_fh)
4177 il->ops->dump_fh(il, NULL, false);
4178 #ifdef CONFIG_IWLEGACY_DEBUG
4179 if (il_get_debug_level(il) & IL_DL_FW_ERRORS)
4180 il_print_rx_config_cmd(il);
4181 #endif
4182
4183 wake_up(&il->wait_command_queue);
4184
4185 /* Keep the restart process from trying to send host
4186 * commands by clearing the INIT status bit */
4187 clear_bit(S_READY, &il->status);
4188
4189 if (!test_bit(S_EXIT_PENDING, &il->status)) {
4190 IL_DBG(IL_DL_FW_ERRORS,
4191 "Restarting adapter due to uCode error.\n");
4192
4193 if (il->cfg->mod_params->restart_fw)
4194 queue_work(il->workqueue, &il->restart);
4195 }
4196 }
4197 EXPORT_SYMBOL(il_irq_handle_error);
4198
4199 static int
4200 _il_apm_stop_master(struct il_priv *il)
4201 {
4202 int ret = 0;
4203
4204 /* stop device's busmaster DMA activity */
4205 _il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
4206
4207 ret =
4208 _il_poll_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
4209 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
4210 if (ret < 0)
4211 IL_WARN("Master Disable Timed Out, 100 usec\n");
4212
4213 D_INFO("stop master\n");
4214
4215 return ret;
4216 }
4217
4218 void
4219 _il_apm_stop(struct il_priv *il)
4220 {
4221 lockdep_assert_held(&il->reg_lock);
4222
4223 D_INFO("Stop card, put in low power state\n");
4224
4225 /* Stop device's DMA activity */
4226 _il_apm_stop_master(il);
4227
4228 /* Reset the entire device */
4229 _il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
4230
4231 udelay(10);
4232
4233 /*
4234 * Clear "initialization complete" bit to move adapter from
4235 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
4236 */
4237 _il_clear_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4238 }
4239 EXPORT_SYMBOL(_il_apm_stop);
4240
4241 void
4242 il_apm_stop(struct il_priv *il)
4243 {
4244 unsigned long flags;
4245
4246 spin_lock_irqsave(&il->reg_lock, flags);
4247 _il_apm_stop(il);
4248 spin_unlock_irqrestore(&il->reg_lock, flags);
4249 }
4250 EXPORT_SYMBOL(il_apm_stop);
4251
4252 /*
4253 * Start up NIC's basic functionality after it has been reset
4254 * (e.g. after platform boot, or shutdown via il_apm_stop())
4255 * NOTE: This does not load uCode nor start the embedded processor
4256 */
4257 int
4258 il_apm_init(struct il_priv *il)
4259 {
4260 int ret = 0;
4261 u16 lctl;
4262
4263 D_INFO("Init card's basic functions\n");
4264
4265 /*
4266 * Use "set_bit" below rather than "write", to preserve any hardware
4267 * bits already set by default after reset.
4268 */
4269
4270 /* Disable L0S exit timer (platform NMI Work/Around) */
4271 il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4272 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
4273
4274 /*
4275 * Disable L0s without affecting L1;
4276 * don't wait for ICH L0s (ICH bug W/A)
4277 */
4278 il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4279 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
4280
4281 /* Set FH wait threshold to maximum (HW error during stress W/A) */
4282 il_set_bit(il, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
4283
4284 /*
4285 * Enable HAP INTA (interrupt from management bus) to
4286 * wake device's PCI Express link L1a -> L0s
4287 * NOTE: This is no-op for 3945 (non-existent bit)
4288 */
4289 il_set_bit(il, CSR_HW_IF_CONFIG_REG,
4290 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
4291
4292 /*
4293 * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
4294 * Check if BIOS (or OS) enabled L1-ASPM on this device.
4295 * If so (likely), disable L0S, so device moves directly L0->L1;
4296 * costs negligible amount of power savings.
4297 * If not (unlikely), enable L0S, so there is at least some
4298 * power savings, even without L1.
4299 */
4300 if (il->cfg->set_l0s) {
4301 pcie_capability_read_word(il->pci_dev, PCI_EXP_LNKCTL, &lctl);
4302 if (lctl & PCI_EXP_LNKCTL_ASPM_L1) {
4303 /* L1-ASPM enabled; disable(!) L0S */
4304 il_set_bit(il, CSR_GIO_REG,
4305 CSR_GIO_REG_VAL_L0S_ENABLED);
4306 D_POWER("L1 Enabled; Disabling L0S\n");
4307 } else {
4308 /* L1-ASPM disabled; enable(!) L0S */
4309 il_clear_bit(il, CSR_GIO_REG,
4310 CSR_GIO_REG_VAL_L0S_ENABLED);
4311 D_POWER("L1 Disabled; Enabling L0S\n");
4312 }
4313 }
4314
4315 /* Configure analog phase-lock-loop before activating to D0A */
4316 if (il->cfg->pll_cfg_val)
4317 il_set_bit(il, CSR_ANA_PLL_CFG,
4318 il->cfg->pll_cfg_val);
4319
4320 /*
4321 * Set "initialization complete" bit to move adapter from
4322 * D0U* --> D0A* (powered-up active) state.
4323 */
4324 il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4325
4326 /*
4327 * Wait for clock stabilization; once stabilized, access to
4328 * device-internal resources is supported, e.g. il_wr_prph()
4329 * and accesses to uCode SRAM.
4330 */
4331 ret =
4332 _il_poll_bit(il, CSR_GP_CNTRL,
4333 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
4334 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
4335 if (ret < 0) {
4336 D_INFO("Failed to init the card\n");
4337 goto out;
4338 }
4339
4340 /*
4341 * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
4342 * BSM (Boostrap State Machine) is only in 3945 and 4965.
4343 *
4344 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
4345 * do not disable clocks. This preserves any hardware bits already
4346 * set by default in "CLK_CTRL_REG" after reset.
4347 */
4348 if (il->cfg->use_bsm)
4349 il_wr_prph(il, APMG_CLK_EN_REG,
4350 APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
4351 else
4352 il_wr_prph(il, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT);
4353 udelay(20);
4354
4355 /* Disable L1-Active */
4356 il_set_bits_prph(il, APMG_PCIDEV_STT_REG,
4357 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
4358
4359 out:
4360 return ret;
4361 }
4362 EXPORT_SYMBOL(il_apm_init);
4363
4364 int
4365 il_set_tx_power(struct il_priv *il, s8 tx_power, bool force)
4366 {
4367 int ret;
4368 s8 prev_tx_power;
4369 bool defer;
4370
4371 lockdep_assert_held(&il->mutex);
4372
4373 if (il->tx_power_user_lmt == tx_power && !force)
4374 return 0;
4375
4376 if (!il->ops->send_tx_power)
4377 return -EOPNOTSUPP;
4378
4379 /* 0 dBm mean 1 milliwatt */
4380 if (tx_power < 0) {
4381 IL_WARN("Requested user TXPOWER %d below 1 mW.\n", tx_power);
4382 return -EINVAL;
4383 }
4384
4385 if (tx_power > il->tx_power_device_lmt) {
4386 IL_WARN("Requested user TXPOWER %d above upper limit %d.\n",
4387 tx_power, il->tx_power_device_lmt);
4388 return -EINVAL;
4389 }
4390
4391 if (!il_is_ready_rf(il))
4392 return -EIO;
4393
4394 /* scan complete and commit_rxon use tx_power_next value,
4395 * it always need to be updated for newest request */
4396 il->tx_power_next = tx_power;
4397
4398 /* do not set tx power when scanning or channel changing */
4399 defer = test_bit(S_SCANNING, &il->status) ||
4400 memcmp(&il->active, &il->staging, sizeof(il->staging));
4401 if (defer && !force) {
4402 D_INFO("Deferring tx power set\n");
4403 return 0;
4404 }
4405
4406 prev_tx_power = il->tx_power_user_lmt;
4407 il->tx_power_user_lmt = tx_power;
4408
4409 ret = il->ops->send_tx_power(il);
4410
4411 /* if fail to set tx_power, restore the orig. tx power */
4412 if (ret) {
4413 il->tx_power_user_lmt = prev_tx_power;
4414 il->tx_power_next = prev_tx_power;
4415 }
4416 return ret;
4417 }
4418 EXPORT_SYMBOL(il_set_tx_power);
4419
4420 void
4421 il_send_bt_config(struct il_priv *il)
4422 {
4423 struct il_bt_cmd bt_cmd = {
4424 .lead_time = BT_LEAD_TIME_DEF,
4425 .max_kill = BT_MAX_KILL_DEF,
4426 .kill_ack_mask = 0,
4427 .kill_cts_mask = 0,
4428 };
4429
4430 if (!bt_coex_active)
4431 bt_cmd.flags = BT_COEX_DISABLE;
4432 else
4433 bt_cmd.flags = BT_COEX_ENABLE;
4434
4435 D_INFO("BT coex %s\n",
4436 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
4437
4438 if (il_send_cmd_pdu(il, C_BT_CONFIG, sizeof(struct il_bt_cmd), &bt_cmd))
4439 IL_ERR("failed to send BT Coex Config\n");
4440 }
4441 EXPORT_SYMBOL(il_send_bt_config);
4442
4443 int
4444 il_send_stats_request(struct il_priv *il, u8 flags, bool clear)
4445 {
4446 struct il_stats_cmd stats_cmd = {
4447 .configuration_flags = clear ? IL_STATS_CONF_CLEAR_STATS : 0,
4448 };
4449
4450 if (flags & CMD_ASYNC)
4451 return il_send_cmd_pdu_async(il, C_STATS, sizeof(struct il_stats_cmd),
4452 &stats_cmd, NULL);
4453 else
4454 return il_send_cmd_pdu(il, C_STATS, sizeof(struct il_stats_cmd),
4455 &stats_cmd);
4456 }
4457 EXPORT_SYMBOL(il_send_stats_request);
4458
4459 void
4460 il_hdl_pm_sleep(struct il_priv *il, struct il_rx_buf *rxb)
4461 {
4462 #ifdef CONFIG_IWLEGACY_DEBUG
4463 struct il_rx_pkt *pkt = rxb_addr(rxb);
4464 struct il_sleep_notification *sleep = &(pkt->u.sleep_notif);
4465 D_RX("sleep mode: %d, src: %d\n",
4466 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
4467 #endif
4468 }
4469 EXPORT_SYMBOL(il_hdl_pm_sleep);
4470
4471 void
4472 il_hdl_pm_debug_stats(struct il_priv *il, struct il_rx_buf *rxb)
4473 {
4474 struct il_rx_pkt *pkt = rxb_addr(rxb);
4475 u32 len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK;
4476 D_RADIO("Dumping %d bytes of unhandled notification for %s:\n", len,
4477 il_get_cmd_string(pkt->hdr.cmd));
4478 il_print_hex_dump(il, IL_DL_RADIO, pkt->u.raw, len);
4479 }
4480 EXPORT_SYMBOL(il_hdl_pm_debug_stats);
4481
4482 void
4483 il_hdl_error(struct il_priv *il, struct il_rx_buf *rxb)
4484 {
4485 struct il_rx_pkt *pkt = rxb_addr(rxb);
4486
4487 IL_ERR("Error Reply type 0x%08X cmd %s (0x%02X) "
4488 "seq 0x%04X ser 0x%08X\n",
4489 le32_to_cpu(pkt->u.err_resp.error_type),
4490 il_get_cmd_string(pkt->u.err_resp.cmd_id),
4491 pkt->u.err_resp.cmd_id,
4492 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
4493 le32_to_cpu(pkt->u.err_resp.error_info));
4494 }
4495 EXPORT_SYMBOL(il_hdl_error);
4496
4497 void
4498 il_clear_isr_stats(struct il_priv *il)
4499 {
4500 memset(&il->isr_stats, 0, sizeof(il->isr_stats));
4501 }
4502
4503 int
4504 il_mac_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u16 queue,
4505 const struct ieee80211_tx_queue_params *params)
4506 {
4507 struct il_priv *il = hw->priv;
4508 unsigned long flags;
4509 int q;
4510
4511 D_MAC80211("enter\n");
4512
4513 if (!il_is_ready_rf(il)) {
4514 D_MAC80211("leave - RF not ready\n");
4515 return -EIO;
4516 }
4517
4518 if (queue >= AC_NUM) {
4519 D_MAC80211("leave - queue >= AC_NUM %d\n", queue);
4520 return 0;
4521 }
4522
4523 q = AC_NUM - 1 - queue;
4524
4525 spin_lock_irqsave(&il->lock, flags);
4526
4527 il->qos_data.def_qos_parm.ac[q].cw_min =
4528 cpu_to_le16(params->cw_min);
4529 il->qos_data.def_qos_parm.ac[q].cw_max =
4530 cpu_to_le16(params->cw_max);
4531 il->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
4532 il->qos_data.def_qos_parm.ac[q].edca_txop =
4533 cpu_to_le16((params->txop * 32));
4534
4535 il->qos_data.def_qos_parm.ac[q].reserved1 = 0;
4536
4537 spin_unlock_irqrestore(&il->lock, flags);
4538
4539 D_MAC80211("leave\n");
4540 return 0;
4541 }
4542 EXPORT_SYMBOL(il_mac_conf_tx);
4543
4544 int
4545 il_mac_tx_last_beacon(struct ieee80211_hw *hw)
4546 {
4547 struct il_priv *il = hw->priv;
4548 int ret;
4549
4550 D_MAC80211("enter\n");
4551
4552 ret = (il->ibss_manager == IL_IBSS_MANAGER);
4553
4554 D_MAC80211("leave ret %d\n", ret);
4555 return ret;
4556 }
4557 EXPORT_SYMBOL_GPL(il_mac_tx_last_beacon);
4558
4559 static int
4560 il_set_mode(struct il_priv *il)
4561 {
4562 il_connection_init_rx_config(il);
4563
4564 if (il->ops->set_rxon_chain)
4565 il->ops->set_rxon_chain(il);
4566
4567 return il_commit_rxon(il);
4568 }
4569
4570 int
4571 il_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4572 {
4573 struct il_priv *il = hw->priv;
4574 int err;
4575 bool reset;
4576
4577 mutex_lock(&il->mutex);
4578 D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
4579
4580 if (!il_is_ready_rf(il)) {
4581 IL_WARN("Try to add interface when device not ready\n");
4582 err = -EINVAL;
4583 goto out;
4584 }
4585
4586 /*
4587 * We do not support multiple virtual interfaces, but on hardware reset
4588 * we have to add the same interface again.
4589 */
4590 reset = (il->vif == vif);
4591 if (il->vif && !reset) {
4592 err = -EOPNOTSUPP;
4593 goto out;
4594 }
4595
4596 il->vif = vif;
4597 il->iw_mode = vif->type;
4598
4599 err = il_set_mode(il);
4600 if (err) {
4601 IL_WARN("Fail to set mode %d\n", vif->type);
4602 if (!reset) {
4603 il->vif = NULL;
4604 il->iw_mode = NL80211_IFTYPE_STATION;
4605 }
4606 }
4607
4608 out:
4609 D_MAC80211("leave err %d\n", err);
4610 mutex_unlock(&il->mutex);
4611
4612 return err;
4613 }
4614 EXPORT_SYMBOL(il_mac_add_interface);
4615
4616 static void
4617 il_teardown_interface(struct il_priv *il, struct ieee80211_vif *vif)
4618 {
4619 lockdep_assert_held(&il->mutex);
4620
4621 if (il->scan_vif == vif) {
4622 il_scan_cancel_timeout(il, 200);
4623 il_force_scan_end(il);
4624 }
4625
4626 il_set_mode(il);
4627 }
4628
4629 void
4630 il_mac_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4631 {
4632 struct il_priv *il = hw->priv;
4633
4634 mutex_lock(&il->mutex);
4635 D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
4636
4637 WARN_ON(il->vif != vif);
4638 il->vif = NULL;
4639 il->iw_mode = NL80211_IFTYPE_UNSPECIFIED;
4640 il_teardown_interface(il, vif);
4641 eth_zero_addr(il->bssid);
4642
4643 D_MAC80211("leave\n");
4644 mutex_unlock(&il->mutex);
4645 }
4646 EXPORT_SYMBOL(il_mac_remove_interface);
4647
4648 int
4649 il_alloc_txq_mem(struct il_priv *il)
4650 {
4651 if (!il->txq)
4652 il->txq =
4653 kzalloc(sizeof(struct il_tx_queue) *
4654 il->cfg->num_of_queues, GFP_KERNEL);
4655 if (!il->txq) {
4656 IL_ERR("Not enough memory for txq\n");
4657 return -ENOMEM;
4658 }
4659 return 0;
4660 }
4661 EXPORT_SYMBOL(il_alloc_txq_mem);
4662
4663 void
4664 il_free_txq_mem(struct il_priv *il)
4665 {
4666 kfree(il->txq);
4667 il->txq = NULL;
4668 }
4669 EXPORT_SYMBOL(il_free_txq_mem);
4670
4671 int
4672 il_force_reset(struct il_priv *il, bool external)
4673 {
4674 struct il_force_reset *force_reset;
4675
4676 if (test_bit(S_EXIT_PENDING, &il->status))
4677 return -EINVAL;
4678
4679 force_reset = &il->force_reset;
4680 force_reset->reset_request_count++;
4681 if (!external) {
4682 if (force_reset->last_force_reset_jiffies &&
4683 time_after(force_reset->last_force_reset_jiffies +
4684 force_reset->reset_duration, jiffies)) {
4685 D_INFO("force reset rejected\n");
4686 force_reset->reset_reject_count++;
4687 return -EAGAIN;
4688 }
4689 }
4690 force_reset->reset_success_count++;
4691 force_reset->last_force_reset_jiffies = jiffies;
4692
4693 /*
4694 * if the request is from external(ex: debugfs),
4695 * then always perform the request in regardless the module
4696 * parameter setting
4697 * if the request is from internal (uCode error or driver
4698 * detect failure), then fw_restart module parameter
4699 * need to be check before performing firmware reload
4700 */
4701
4702 if (!external && !il->cfg->mod_params->restart_fw) {
4703 D_INFO("Cancel firmware reload based on "
4704 "module parameter setting\n");
4705 return 0;
4706 }
4707
4708 IL_ERR("On demand firmware reload\n");
4709
4710 /* Set the FW error flag -- cleared on il_down */
4711 set_bit(S_FW_ERROR, &il->status);
4712 wake_up(&il->wait_command_queue);
4713 /*
4714 * Keep the restart process from trying to send host
4715 * commands by clearing the INIT status bit
4716 */
4717 clear_bit(S_READY, &il->status);
4718 queue_work(il->workqueue, &il->restart);
4719
4720 return 0;
4721 }
4722 EXPORT_SYMBOL(il_force_reset);
4723
4724 int
4725 il_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4726 enum nl80211_iftype newtype, bool newp2p)
4727 {
4728 struct il_priv *il = hw->priv;
4729 int err;
4730
4731 mutex_lock(&il->mutex);
4732 D_MAC80211("enter: type %d, addr %pM newtype %d newp2p %d\n",
4733 vif->type, vif->addr, newtype, newp2p);
4734
4735 if (newp2p) {
4736 err = -EOPNOTSUPP;
4737 goto out;
4738 }
4739
4740 if (!il->vif || !il_is_ready_rf(il)) {
4741 /*
4742 * Huh? But wait ... this can maybe happen when
4743 * we're in the middle of a firmware restart!
4744 */
4745 err = -EBUSY;
4746 goto out;
4747 }
4748
4749 /* success */
4750 vif->type = newtype;
4751 vif->p2p = false;
4752 il->iw_mode = newtype;
4753 il_teardown_interface(il, vif);
4754 err = 0;
4755
4756 out:
4757 D_MAC80211("leave err %d\n", err);
4758 mutex_unlock(&il->mutex);
4759
4760 return err;
4761 }
4762 EXPORT_SYMBOL(il_mac_change_interface);
4763
4764 void il_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4765 u32 queues, bool drop)
4766 {
4767 struct il_priv *il = hw->priv;
4768 unsigned long timeout = jiffies + msecs_to_jiffies(500);
4769 int i;
4770
4771 mutex_lock(&il->mutex);
4772 D_MAC80211("enter\n");
4773
4774 if (il->txq == NULL)
4775 goto out;
4776
4777 for (i = 0; i < il->hw_params.max_txq_num; i++) {
4778 struct il_queue *q;
4779
4780 if (i == il->cmd_queue)
4781 continue;
4782
4783 q = &il->txq[i].q;
4784 if (q->read_ptr == q->write_ptr)
4785 continue;
4786
4787 if (time_after(jiffies, timeout)) {
4788 IL_ERR("Failed to flush queue %d\n", q->id);
4789 break;
4790 }
4791
4792 msleep(20);
4793 }
4794 out:
4795 D_MAC80211("leave\n");
4796 mutex_unlock(&il->mutex);
4797 }
4798 EXPORT_SYMBOL(il_mac_flush);
4799
4800 /*
4801 * On every watchdog tick we check (latest) time stamp. If it does not
4802 * change during timeout period and queue is not empty we reset firmware.
4803 */
4804 static int
4805 il_check_stuck_queue(struct il_priv *il, int cnt)
4806 {
4807 struct il_tx_queue *txq = &il->txq[cnt];
4808 struct il_queue *q = &txq->q;
4809 unsigned long timeout;
4810 unsigned long now = jiffies;
4811 int ret;
4812
4813 if (q->read_ptr == q->write_ptr) {
4814 txq->time_stamp = now;
4815 return 0;
4816 }
4817
4818 timeout =
4819 txq->time_stamp +
4820 msecs_to_jiffies(il->cfg->wd_timeout);
4821
4822 if (time_after(now, timeout)) {
4823 IL_ERR("Queue %d stuck for %u ms.\n", q->id,
4824 jiffies_to_msecs(now - txq->time_stamp));
4825 ret = il_force_reset(il, false);
4826 return (ret == -EAGAIN) ? 0 : 1;
4827 }
4828
4829 return 0;
4830 }
4831
4832 /*
4833 * Making watchdog tick be a quarter of timeout assure we will
4834 * discover the queue hung between timeout and 1.25*timeout
4835 */
4836 #define IL_WD_TICK(timeout) ((timeout) / 4)
4837
4838 /*
4839 * Watchdog timer callback, we check each tx queue for stuck, if if hung
4840 * we reset the firmware. If everything is fine just rearm the timer.
4841 */
4842 void
4843 il_bg_watchdog(unsigned long data)
4844 {
4845 struct il_priv *il = (struct il_priv *)data;
4846 int cnt;
4847 unsigned long timeout;
4848
4849 if (test_bit(S_EXIT_PENDING, &il->status))
4850 return;
4851
4852 timeout = il->cfg->wd_timeout;
4853 if (timeout == 0)
4854 return;
4855
4856 /* monitor and check for stuck cmd queue */
4857 if (il_check_stuck_queue(il, il->cmd_queue))
4858 return;
4859
4860 /* monitor and check for other stuck queues */
4861 for (cnt = 0; cnt < il->hw_params.max_txq_num; cnt++) {
4862 /* skip as we already checked the command queue */
4863 if (cnt == il->cmd_queue)
4864 continue;
4865 if (il_check_stuck_queue(il, cnt))
4866 return;
4867 }
4868
4869 mod_timer(&il->watchdog,
4870 jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
4871 }
4872 EXPORT_SYMBOL(il_bg_watchdog);
4873
4874 void
4875 il_setup_watchdog(struct il_priv *il)
4876 {
4877 unsigned int timeout = il->cfg->wd_timeout;
4878
4879 if (timeout)
4880 mod_timer(&il->watchdog,
4881 jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
4882 else
4883 del_timer(&il->watchdog);
4884 }
4885 EXPORT_SYMBOL(il_setup_watchdog);
4886
4887 /*
4888 * extended beacon time format
4889 * time in usec will be changed into a 32-bit value in extended:internal format
4890 * the extended part is the beacon counts
4891 * the internal part is the time in usec within one beacon interval
4892 */
4893 u32
4894 il_usecs_to_beacons(struct il_priv *il, u32 usec, u32 beacon_interval)
4895 {
4896 u32 quot;
4897 u32 rem;
4898 u32 interval = beacon_interval * TIME_UNIT;
4899
4900 if (!interval || !usec)
4901 return 0;
4902
4903 quot =
4904 (usec /
4905 interval) & (il_beacon_time_mask_high(il,
4906 il->hw_params.
4907 beacon_time_tsf_bits) >> il->
4908 hw_params.beacon_time_tsf_bits);
4909 rem =
4910 (usec % interval) & il_beacon_time_mask_low(il,
4911 il->hw_params.
4912 beacon_time_tsf_bits);
4913
4914 return (quot << il->hw_params.beacon_time_tsf_bits) + rem;
4915 }
4916 EXPORT_SYMBOL(il_usecs_to_beacons);
4917
4918 /* base is usually what we get from ucode with each received frame,
4919 * the same as HW timer counter counting down
4920 */
4921 __le32
4922 il_add_beacon_time(struct il_priv *il, u32 base, u32 addon,
4923 u32 beacon_interval)
4924 {
4925 u32 base_low = base & il_beacon_time_mask_low(il,
4926 il->hw_params.
4927 beacon_time_tsf_bits);
4928 u32 addon_low = addon & il_beacon_time_mask_low(il,
4929 il->hw_params.
4930 beacon_time_tsf_bits);
4931 u32 interval = beacon_interval * TIME_UNIT;
4932 u32 res = (base & il_beacon_time_mask_high(il,
4933 il->hw_params.
4934 beacon_time_tsf_bits)) +
4935 (addon & il_beacon_time_mask_high(il,
4936 il->hw_params.
4937 beacon_time_tsf_bits));
4938
4939 if (base_low > addon_low)
4940 res += base_low - addon_low;
4941 else if (base_low < addon_low) {
4942 res += interval + base_low - addon_low;
4943 res += (1 << il->hw_params.beacon_time_tsf_bits);
4944 } else
4945 res += (1 << il->hw_params.beacon_time_tsf_bits);
4946
4947 return cpu_to_le32(res);
4948 }
4949 EXPORT_SYMBOL(il_add_beacon_time);
4950
4951 #ifdef CONFIG_PM_SLEEP
4952
4953 static int
4954 il_pci_suspend(struct device *device)
4955 {
4956 struct pci_dev *pdev = to_pci_dev(device);
4957 struct il_priv *il = pci_get_drvdata(pdev);
4958
4959 /*
4960 * This function is called when system goes into suspend state
4961 * mac80211 will call il_mac_stop() from the mac80211 suspend function
4962 * first but since il_mac_stop() has no knowledge of who the caller is,
4963 * it will not call apm_ops.stop() to stop the DMA operation.
4964 * Calling apm_ops.stop here to make sure we stop the DMA.
4965 */
4966 il_apm_stop(il);
4967
4968 return 0;
4969 }
4970
4971 static int
4972 il_pci_resume(struct device *device)
4973 {
4974 struct pci_dev *pdev = to_pci_dev(device);
4975 struct il_priv *il = pci_get_drvdata(pdev);
4976 bool hw_rfkill = false;
4977
4978 /*
4979 * We disable the RETRY_TIMEOUT register (0x41) to keep
4980 * PCI Tx retries from interfering with C3 CPU state.
4981 */
4982 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
4983
4984 il_enable_interrupts(il);
4985
4986 if (!(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4987 hw_rfkill = true;
4988
4989 if (hw_rfkill)
4990 set_bit(S_RFKILL, &il->status);
4991 else
4992 clear_bit(S_RFKILL, &il->status);
4993
4994 wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rfkill);
4995
4996 return 0;
4997 }
4998
4999 SIMPLE_DEV_PM_OPS(il_pm_ops, il_pci_suspend, il_pci_resume);
5000 EXPORT_SYMBOL(il_pm_ops);
5001
5002 #endif /* CONFIG_PM_SLEEP */
5003
5004 static void
5005 il_update_qos(struct il_priv *il)
5006 {
5007 if (test_bit(S_EXIT_PENDING, &il->status))
5008 return;
5009
5010 il->qos_data.def_qos_parm.qos_flags = 0;
5011
5012 if (il->qos_data.qos_active)
5013 il->qos_data.def_qos_parm.qos_flags |=
5014 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
5015
5016 if (il->ht.enabled)
5017 il->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
5018
5019 D_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
5020 il->qos_data.qos_active, il->qos_data.def_qos_parm.qos_flags);
5021
5022 il_send_cmd_pdu_async(il, C_QOS_PARAM, sizeof(struct il_qosparam_cmd),
5023 &il->qos_data.def_qos_parm, NULL);
5024 }
5025
5026 /**
5027 * il_mac_config - mac80211 config callback
5028 */
5029 int
5030 il_mac_config(struct ieee80211_hw *hw, u32 changed)
5031 {
5032 struct il_priv *il = hw->priv;
5033 const struct il_channel_info *ch_info;
5034 struct ieee80211_conf *conf = &hw->conf;
5035 struct ieee80211_channel *channel = conf->chandef.chan;
5036 struct il_ht_config *ht_conf = &il->current_ht_config;
5037 unsigned long flags = 0;
5038 int ret = 0;
5039 u16 ch;
5040 int scan_active = 0;
5041 bool ht_changed = false;
5042
5043 mutex_lock(&il->mutex);
5044 D_MAC80211("enter: channel %d changed 0x%X\n", channel->hw_value,
5045 changed);
5046
5047 if (unlikely(test_bit(S_SCANNING, &il->status))) {
5048 scan_active = 1;
5049 D_MAC80211("scan active\n");
5050 }
5051
5052 if (changed &
5053 (IEEE80211_CONF_CHANGE_SMPS | IEEE80211_CONF_CHANGE_CHANNEL)) {
5054 /* mac80211 uses static for non-HT which is what we want */
5055 il->current_ht_config.smps = conf->smps_mode;
5056
5057 /*
5058 * Recalculate chain counts.
5059 *
5060 * If monitor mode is enabled then mac80211 will
5061 * set up the SM PS mode to OFF if an HT channel is
5062 * configured.
5063 */
5064 if (il->ops->set_rxon_chain)
5065 il->ops->set_rxon_chain(il);
5066 }
5067
5068 /* during scanning mac80211 will delay channel setting until
5069 * scan finish with changed = 0
5070 */
5071 if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
5072
5073 if (scan_active)
5074 goto set_ch_out;
5075
5076 ch = channel->hw_value;
5077 ch_info = il_get_channel_info(il, channel->band, ch);
5078 if (!il_is_channel_valid(ch_info)) {
5079 D_MAC80211("leave - invalid channel\n");
5080 ret = -EINVAL;
5081 goto set_ch_out;
5082 }
5083
5084 if (il->iw_mode == NL80211_IFTYPE_ADHOC &&
5085 !il_is_channel_ibss(ch_info)) {
5086 D_MAC80211("leave - not IBSS channel\n");
5087 ret = -EINVAL;
5088 goto set_ch_out;
5089 }
5090
5091 spin_lock_irqsave(&il->lock, flags);
5092
5093 /* Configure HT40 channels */
5094 if (il->ht.enabled != conf_is_ht(conf)) {
5095 il->ht.enabled = conf_is_ht(conf);
5096 ht_changed = true;
5097 }
5098 if (il->ht.enabled) {
5099 if (conf_is_ht40_minus(conf)) {
5100 il->ht.extension_chan_offset =
5101 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
5102 il->ht.is_40mhz = true;
5103 } else if (conf_is_ht40_plus(conf)) {
5104 il->ht.extension_chan_offset =
5105 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
5106 il->ht.is_40mhz = true;
5107 } else {
5108 il->ht.extension_chan_offset =
5109 IEEE80211_HT_PARAM_CHA_SEC_NONE;
5110 il->ht.is_40mhz = false;
5111 }
5112 } else
5113 il->ht.is_40mhz = false;
5114
5115 /*
5116 * Default to no protection. Protection mode will
5117 * later be set from BSS config in il_ht_conf
5118 */
5119 il->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
5120
5121 /* if we are switching from ht to 2.4 clear flags
5122 * from any ht related info since 2.4 does not
5123 * support ht */
5124 if ((le16_to_cpu(il->staging.channel) != ch))
5125 il->staging.flags = 0;
5126
5127 il_set_rxon_channel(il, channel);
5128 il_set_rxon_ht(il, ht_conf);
5129
5130 il_set_flags_for_band(il, channel->band, il->vif);
5131
5132 spin_unlock_irqrestore(&il->lock, flags);
5133
5134 if (il->ops->update_bcast_stations)
5135 ret = il->ops->update_bcast_stations(il);
5136
5137 set_ch_out:
5138 /* The list of supported rates and rate mask can be different
5139 * for each band; since the band may have changed, reset
5140 * the rate mask to what mac80211 lists */
5141 il_set_rate(il);
5142 }
5143
5144 if (changed & (IEEE80211_CONF_CHANGE_PS | IEEE80211_CONF_CHANGE_IDLE)) {
5145 il->power_data.ps_disabled = !(conf->flags & IEEE80211_CONF_PS);
5146 ret = il_power_update_mode(il, false);
5147 if (ret)
5148 D_MAC80211("Error setting sleep level\n");
5149 }
5150
5151 if (changed & IEEE80211_CONF_CHANGE_POWER) {
5152 D_MAC80211("TX Power old=%d new=%d\n", il->tx_power_user_lmt,
5153 conf->power_level);
5154
5155 il_set_tx_power(il, conf->power_level, false);
5156 }
5157
5158 if (!il_is_ready(il)) {
5159 D_MAC80211("leave - not ready\n");
5160 goto out;
5161 }
5162
5163 if (scan_active)
5164 goto out;
5165
5166 if (memcmp(&il->active, &il->staging, sizeof(il->staging)))
5167 il_commit_rxon(il);
5168 else
5169 D_INFO("Not re-sending same RXON configuration.\n");
5170 if (ht_changed)
5171 il_update_qos(il);
5172
5173 out:
5174 D_MAC80211("leave ret %d\n", ret);
5175 mutex_unlock(&il->mutex);
5176
5177 return ret;
5178 }
5179 EXPORT_SYMBOL(il_mac_config);
5180
5181 void
5182 il_mac_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5183 {
5184 struct il_priv *il = hw->priv;
5185 unsigned long flags;
5186
5187 mutex_lock(&il->mutex);
5188 D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
5189
5190 spin_lock_irqsave(&il->lock, flags);
5191
5192 memset(&il->current_ht_config, 0, sizeof(struct il_ht_config));
5193
5194 /* new association get rid of ibss beacon skb */
5195 if (il->beacon_skb)
5196 dev_kfree_skb(il->beacon_skb);
5197 il->beacon_skb = NULL;
5198 il->timestamp = 0;
5199
5200 spin_unlock_irqrestore(&il->lock, flags);
5201
5202 il_scan_cancel_timeout(il, 100);
5203 if (!il_is_ready_rf(il)) {
5204 D_MAC80211("leave - not ready\n");
5205 mutex_unlock(&il->mutex);
5206 return;
5207 }
5208
5209 /* we are restarting association process */
5210 il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5211 il_commit_rxon(il);
5212
5213 il_set_rate(il);
5214
5215 D_MAC80211("leave\n");
5216 mutex_unlock(&il->mutex);
5217 }
5218 EXPORT_SYMBOL(il_mac_reset_tsf);
5219
5220 static void
5221 il_ht_conf(struct il_priv *il, struct ieee80211_vif *vif)
5222 {
5223 struct il_ht_config *ht_conf = &il->current_ht_config;
5224 struct ieee80211_sta *sta;
5225 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
5226
5227 D_ASSOC("enter:\n");
5228
5229 if (!il->ht.enabled)
5230 return;
5231
5232 il->ht.protection =
5233 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
5234 il->ht.non_gf_sta_present =
5235 !!(bss_conf->
5236 ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
5237
5238 ht_conf->single_chain_sufficient = false;
5239
5240 switch (vif->type) {
5241 case NL80211_IFTYPE_STATION:
5242 rcu_read_lock();
5243 sta = ieee80211_find_sta(vif, bss_conf->bssid);
5244 if (sta) {
5245 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
5246 int maxstreams;
5247
5248 maxstreams =
5249 (ht_cap->mcs.
5250 tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
5251 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
5252 maxstreams += 1;
5253
5254 if (ht_cap->mcs.rx_mask[1] == 0 &&
5255 ht_cap->mcs.rx_mask[2] == 0)
5256 ht_conf->single_chain_sufficient = true;
5257 if (maxstreams <= 1)
5258 ht_conf->single_chain_sufficient = true;
5259 } else {
5260 /*
5261 * If at all, this can only happen through a race
5262 * when the AP disconnects us while we're still
5263 * setting up the connection, in that case mac80211
5264 * will soon tell us about that.
5265 */
5266 ht_conf->single_chain_sufficient = true;
5267 }
5268 rcu_read_unlock();
5269 break;
5270 case NL80211_IFTYPE_ADHOC:
5271 ht_conf->single_chain_sufficient = true;
5272 break;
5273 default:
5274 break;
5275 }
5276
5277 D_ASSOC("leave\n");
5278 }
5279
5280 static inline void
5281 il_set_no_assoc(struct il_priv *il, struct ieee80211_vif *vif)
5282 {
5283 /*
5284 * inform the ucode that there is no longer an
5285 * association and that no more packets should be
5286 * sent
5287 */
5288 il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5289 il->staging.assoc_id = 0;
5290 il_commit_rxon(il);
5291 }
5292
5293 static void
5294 il_beacon_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5295 {
5296 struct il_priv *il = hw->priv;
5297 unsigned long flags;
5298 __le64 timestamp;
5299 struct sk_buff *skb = ieee80211_beacon_get(hw, vif);
5300
5301 if (!skb)
5302 return;
5303
5304 D_MAC80211("enter\n");
5305
5306 lockdep_assert_held(&il->mutex);
5307
5308 if (!il->beacon_enabled) {
5309 IL_ERR("update beacon with no beaconing enabled\n");
5310 dev_kfree_skb(skb);
5311 return;
5312 }
5313
5314 spin_lock_irqsave(&il->lock, flags);
5315
5316 if (il->beacon_skb)
5317 dev_kfree_skb(il->beacon_skb);
5318
5319 il->beacon_skb = skb;
5320
5321 timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
5322 il->timestamp = le64_to_cpu(timestamp);
5323
5324 D_MAC80211("leave\n");
5325 spin_unlock_irqrestore(&il->lock, flags);
5326
5327 if (!il_is_ready_rf(il)) {
5328 D_MAC80211("leave - RF not ready\n");
5329 return;
5330 }
5331
5332 il->ops->post_associate(il);
5333 }
5334
5335 void
5336 il_mac_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5337 struct ieee80211_bss_conf *bss_conf, u32 changes)
5338 {
5339 struct il_priv *il = hw->priv;
5340 int ret;
5341
5342 mutex_lock(&il->mutex);
5343 D_MAC80211("enter: changes 0x%x\n", changes);
5344
5345 if (!il_is_alive(il)) {
5346 D_MAC80211("leave - not alive\n");
5347 mutex_unlock(&il->mutex);
5348 return;
5349 }
5350
5351 if (changes & BSS_CHANGED_QOS) {
5352 unsigned long flags;
5353
5354 spin_lock_irqsave(&il->lock, flags);
5355 il->qos_data.qos_active = bss_conf->qos;
5356 il_update_qos(il);
5357 spin_unlock_irqrestore(&il->lock, flags);
5358 }
5359
5360 if (changes & BSS_CHANGED_BEACON_ENABLED) {
5361 /* FIXME: can we remove beacon_enabled ? */
5362 if (vif->bss_conf.enable_beacon)
5363 il->beacon_enabled = true;
5364 else
5365 il->beacon_enabled = false;
5366 }
5367
5368 if (changes & BSS_CHANGED_BSSID) {
5369 D_MAC80211("BSSID %pM\n", bss_conf->bssid);
5370
5371 /*
5372 * On passive channel we wait with blocked queues to see if
5373 * there is traffic on that channel. If no frame will be
5374 * received (what is very unlikely since scan detects AP on
5375 * that channel, but theoretically possible), mac80211 associate
5376 * procedure will time out and mac80211 will call us with NULL
5377 * bssid. We have to unblock queues on such condition.
5378 */
5379 if (is_zero_ether_addr(bss_conf->bssid))
5380 il_wake_queues_by_reason(il, IL_STOP_REASON_PASSIVE);
5381
5382 /*
5383 * If there is currently a HW scan going on in the background,
5384 * then we need to cancel it, otherwise sometimes we are not
5385 * able to authenticate (FIXME: why ?)
5386 */
5387 if (il_scan_cancel_timeout(il, 100)) {
5388 D_MAC80211("leave - scan abort failed\n");
5389 mutex_unlock(&il->mutex);
5390 return;
5391 }
5392
5393 /* mac80211 only sets assoc when in STATION mode */
5394 memcpy(il->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
5395
5396 /* FIXME: currently needed in a few places */
5397 memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5398 }
5399
5400 /*
5401 * This needs to be after setting the BSSID in case
5402 * mac80211 decides to do both changes at once because
5403 * it will invoke post_associate.
5404 */
5405 if (vif->type == NL80211_IFTYPE_ADHOC && (changes & BSS_CHANGED_BEACON))
5406 il_beacon_update(hw, vif);
5407
5408 if (changes & BSS_CHANGED_ERP_PREAMBLE) {
5409 D_MAC80211("ERP_PREAMBLE %d\n", bss_conf->use_short_preamble);
5410 if (bss_conf->use_short_preamble)
5411 il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5412 else
5413 il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5414 }
5415
5416 if (changes & BSS_CHANGED_ERP_CTS_PROT) {
5417 D_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
5418 if (bss_conf->use_cts_prot && il->band != NL80211_BAND_5GHZ)
5419 il->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
5420 else
5421 il->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
5422 if (bss_conf->use_cts_prot)
5423 il->staging.flags |= RXON_FLG_SELF_CTS_EN;
5424 else
5425 il->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
5426 }
5427
5428 if (changes & BSS_CHANGED_BASIC_RATES) {
5429 /* XXX use this information
5430 *
5431 * To do that, remove code from il_set_rate() and put something
5432 * like this here:
5433 *
5434 if (A-band)
5435 il->staging.ofdm_basic_rates =
5436 bss_conf->basic_rates;
5437 else
5438 il->staging.ofdm_basic_rates =
5439 bss_conf->basic_rates >> 4;
5440 il->staging.cck_basic_rates =
5441 bss_conf->basic_rates & 0xF;
5442 */
5443 }
5444
5445 if (changes & BSS_CHANGED_HT) {
5446 il_ht_conf(il, vif);
5447
5448 if (il->ops->set_rxon_chain)
5449 il->ops->set_rxon_chain(il);
5450 }
5451
5452 if (changes & BSS_CHANGED_ASSOC) {
5453 D_MAC80211("ASSOC %d\n", bss_conf->assoc);
5454 if (bss_conf->assoc) {
5455 il->timestamp = bss_conf->sync_tsf;
5456
5457 if (!il_is_rfkill(il))
5458 il->ops->post_associate(il);
5459 } else
5460 il_set_no_assoc(il, vif);
5461 }
5462
5463 if (changes && il_is_associated(il) && bss_conf->aid) {
5464 D_MAC80211("Changes (%#x) while associated\n", changes);
5465 ret = il_send_rxon_assoc(il);
5466 if (!ret) {
5467 /* Sync active_rxon with latest change. */
5468 memcpy((void *)&il->active, &il->staging,
5469 sizeof(struct il_rxon_cmd));
5470 }
5471 }
5472
5473 if (changes & BSS_CHANGED_BEACON_ENABLED) {
5474 if (vif->bss_conf.enable_beacon) {
5475 memcpy(il->staging.bssid_addr, bss_conf->bssid,
5476 ETH_ALEN);
5477 memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5478 il->ops->config_ap(il);
5479 } else
5480 il_set_no_assoc(il, vif);
5481 }
5482
5483 if (changes & BSS_CHANGED_IBSS) {
5484 ret = il->ops->manage_ibss_station(il, vif,
5485 bss_conf->ibss_joined);
5486 if (ret)
5487 IL_ERR("failed to %s IBSS station %pM\n",
5488 bss_conf->ibss_joined ? "add" : "remove",
5489 bss_conf->bssid);
5490 }
5491
5492 D_MAC80211("leave\n");
5493 mutex_unlock(&il->mutex);
5494 }
5495 EXPORT_SYMBOL(il_mac_bss_info_changed);
5496
5497 irqreturn_t
5498 il_isr(int irq, void *data)
5499 {
5500 struct il_priv *il = data;
5501 u32 inta, inta_mask;
5502 u32 inta_fh;
5503 unsigned long flags;
5504 if (!il)
5505 return IRQ_NONE;
5506
5507 spin_lock_irqsave(&il->lock, flags);
5508
5509 /* Disable (but don't clear!) interrupts here to avoid
5510 * back-to-back ISRs and sporadic interrupts from our NIC.
5511 * If we have something to service, the tasklet will re-enable ints.
5512 * If we *don't* have something, we'll re-enable before leaving here. */
5513 inta_mask = _il_rd(il, CSR_INT_MASK); /* just for debug */
5514 _il_wr(il, CSR_INT_MASK, 0x00000000);
5515
5516 /* Discover which interrupts are active/pending */
5517 inta = _il_rd(il, CSR_INT);
5518 inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
5519
5520 /* Ignore interrupt if there's nothing in NIC to service.
5521 * This may be due to IRQ shared with another device,
5522 * or due to sporadic interrupts thrown from our NIC. */
5523 if (!inta && !inta_fh) {
5524 D_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
5525 goto none;
5526 }
5527
5528 if (inta == 0xFFFFFFFF || (inta & 0xFFFFFFF0) == 0xa5a5a5a0) {
5529 /* Hardware disappeared. It might have already raised
5530 * an interrupt */
5531 IL_WARN("HARDWARE GONE?? INTA == 0x%08x\n", inta);
5532 goto unplugged;
5533 }
5534
5535 D_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta, inta_mask,
5536 inta_fh);
5537
5538 inta &= ~CSR_INT_BIT_SCD;
5539
5540 /* il_irq_tasklet() will service interrupts and re-enable them */
5541 if (likely(inta || inta_fh))
5542 tasklet_schedule(&il->irq_tasklet);
5543
5544 unplugged:
5545 spin_unlock_irqrestore(&il->lock, flags);
5546 return IRQ_HANDLED;
5547
5548 none:
5549 /* re-enable interrupts here since we don't have anything to service. */
5550 /* only Re-enable if disabled by irq */
5551 if (test_bit(S_INT_ENABLED, &il->status))
5552 il_enable_interrupts(il);
5553 spin_unlock_irqrestore(&il->lock, flags);
5554 return IRQ_NONE;
5555 }
5556 EXPORT_SYMBOL(il_isr);
5557
5558 /*
5559 * il_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
5560 * function.
5561 */
5562 void
5563 il_tx_cmd_protection(struct il_priv *il, struct ieee80211_tx_info *info,
5564 __le16 fc, __le32 *tx_flags)
5565 {
5566 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
5567 *tx_flags |= TX_CMD_FLG_RTS_MSK;
5568 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
5569 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5570
5571 if (!ieee80211_is_mgmt(fc))
5572 return;
5573
5574 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
5575 case cpu_to_le16(IEEE80211_STYPE_AUTH):
5576 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
5577 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
5578 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
5579 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5580 *tx_flags |= TX_CMD_FLG_CTS_MSK;
5581 break;
5582 }
5583 } else if (info->control.rates[0].
5584 flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
5585 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5586 *tx_flags |= TX_CMD_FLG_CTS_MSK;
5587 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5588 }
5589 }
5590 EXPORT_SYMBOL(il_tx_cmd_protection);
Linux with added FPC-III support