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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / drivers / net / wireless / intel / iwlegacy / common.c
blob558bb16bfd46476328276104df799301c1bc15b8
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 struct cfg80211_scan_info info = {
1309 .aborted = aborted,
1310 };
1311
1312 /* check if scan was requested from mac80211 */
1313 if (il->scan_request) {
1314 D_SCAN("Complete scan in mac80211\n");
1315 ieee80211_scan_completed(il->hw, &info);
1316 }
1317
1318 il->scan_vif = NULL;
1319 il->scan_request = NULL;
1320 }
1321
1322 void
1323 il_force_scan_end(struct il_priv *il)
1324 {
1325 lockdep_assert_held(&il->mutex);
1326
1327 if (!test_bit(S_SCANNING, &il->status)) {
1328 D_SCAN("Forcing scan end while not scanning\n");
1329 return;
1330 }
1331
1332 D_SCAN("Forcing scan end\n");
1333 clear_bit(S_SCANNING, &il->status);
1334 clear_bit(S_SCAN_HW, &il->status);
1335 clear_bit(S_SCAN_ABORTING, &il->status);
1336 il_complete_scan(il, true);
1337 }
1338
1339 static void
1340 il_do_scan_abort(struct il_priv *il)
1341 {
1342 int ret;
1343
1344 lockdep_assert_held(&il->mutex);
1345
1346 if (!test_bit(S_SCANNING, &il->status)) {
1347 D_SCAN("Not performing scan to abort\n");
1348 return;
1349 }
1350
1351 if (test_and_set_bit(S_SCAN_ABORTING, &il->status)) {
1352 D_SCAN("Scan abort in progress\n");
1353 return;
1354 }
1355
1356 ret = il_send_scan_abort(il);
1357 if (ret) {
1358 D_SCAN("Send scan abort failed %d\n", ret);
1359 il_force_scan_end(il);
1360 } else
1361 D_SCAN("Successfully send scan abort\n");
1362 }
1363
1364 /**
1365 * il_scan_cancel - Cancel any currently executing HW scan
1366 */
1367 int
1368 il_scan_cancel(struct il_priv *il)
1369 {
1370 D_SCAN("Queuing abort scan\n");
1371 queue_work(il->workqueue, &il->abort_scan);
1372 return 0;
1373 }
1374 EXPORT_SYMBOL(il_scan_cancel);
1375
1376 /**
1377 * il_scan_cancel_timeout - Cancel any currently executing HW scan
1378 * @ms: amount of time to wait (in milliseconds) for scan to abort
1379 *
1380 */
1381 int
1382 il_scan_cancel_timeout(struct il_priv *il, unsigned long ms)
1383 {
1384 unsigned long timeout = jiffies + msecs_to_jiffies(ms);
1385
1386 lockdep_assert_held(&il->mutex);
1387
1388 D_SCAN("Scan cancel timeout\n");
1389
1390 il_do_scan_abort(il);
1391
1392 while (time_before_eq(jiffies, timeout)) {
1393 if (!test_bit(S_SCAN_HW, &il->status))
1394 break;
1395 msleep(20);
1396 }
1397
1398 return test_bit(S_SCAN_HW, &il->status);
1399 }
1400 EXPORT_SYMBOL(il_scan_cancel_timeout);
1401
1402 /* Service response to C_SCAN (0x80) */
1403 static void
1404 il_hdl_scan(struct il_priv *il, struct il_rx_buf *rxb)
1405 {
1406 #ifdef CONFIG_IWLEGACY_DEBUG
1407 struct il_rx_pkt *pkt = rxb_addr(rxb);
1408 struct il_scanreq_notification *notif =
1409 (struct il_scanreq_notification *)pkt->u.raw;
1410
1411 D_SCAN("Scan request status = 0x%x\n", notif->status);
1412 #endif
1413 }
1414
1415 /* Service N_SCAN_START (0x82) */
1416 static void
1417 il_hdl_scan_start(struct il_priv *il, struct il_rx_buf *rxb)
1418 {
1419 struct il_rx_pkt *pkt = rxb_addr(rxb);
1420 struct il_scanstart_notification *notif =
1421 (struct il_scanstart_notification *)pkt->u.raw;
1422 il->scan_start_tsf = le32_to_cpu(notif->tsf_low);
1423 D_SCAN("Scan start: " "%d [802.11%s] "
1424 "(TSF: 0x%08X:%08X) - %d (beacon timer %u)\n", notif->channel,
1425 notif->band ? "bg" : "a", le32_to_cpu(notif->tsf_high),
1426 le32_to_cpu(notif->tsf_low), notif->status, notif->beacon_timer);
1427 }
1428
1429 /* Service N_SCAN_RESULTS (0x83) */
1430 static void
1431 il_hdl_scan_results(struct il_priv *il, struct il_rx_buf *rxb)
1432 {
1433 #ifdef CONFIG_IWLEGACY_DEBUG
1434 struct il_rx_pkt *pkt = rxb_addr(rxb);
1435 struct il_scanresults_notification *notif =
1436 (struct il_scanresults_notification *)pkt->u.raw;
1437
1438 D_SCAN("Scan ch.res: " "%d [802.11%s] " "(TSF: 0x%08X:%08X) - %d "
1439 "elapsed=%lu usec\n", notif->channel, notif->band ? "bg" : "a",
1440 le32_to_cpu(notif->tsf_high), le32_to_cpu(notif->tsf_low),
1441 le32_to_cpu(notif->stats[0]),
1442 le32_to_cpu(notif->tsf_low) - il->scan_start_tsf);
1443 #endif
1444 }
1445
1446 /* Service N_SCAN_COMPLETE (0x84) */
1447 static void
1448 il_hdl_scan_complete(struct il_priv *il, struct il_rx_buf *rxb)
1449 {
1450
1451 #ifdef CONFIG_IWLEGACY_DEBUG
1452 struct il_rx_pkt *pkt = rxb_addr(rxb);
1453 struct il_scancomplete_notification *scan_notif = (void *)pkt->u.raw;
1454 #endif
1455
1456 D_SCAN("Scan complete: %d channels (TSF 0x%08X:%08X) - %d\n",
1457 scan_notif->scanned_channels, scan_notif->tsf_low,
1458 scan_notif->tsf_high, scan_notif->status);
1459
1460 /* The HW is no longer scanning */
1461 clear_bit(S_SCAN_HW, &il->status);
1462
1463 D_SCAN("Scan on %sGHz took %dms\n",
1464 (il->scan_band == NL80211_BAND_2GHZ) ? "2.4" : "5.2",
1465 jiffies_to_msecs(jiffies - il->scan_start));
1466
1467 queue_work(il->workqueue, &il->scan_completed);
1468 }
1469
1470 void
1471 il_setup_rx_scan_handlers(struct il_priv *il)
1472 {
1473 /* scan handlers */
1474 il->handlers[C_SCAN] = il_hdl_scan;
1475 il->handlers[N_SCAN_START] = il_hdl_scan_start;
1476 il->handlers[N_SCAN_RESULTS] = il_hdl_scan_results;
1477 il->handlers[N_SCAN_COMPLETE] = il_hdl_scan_complete;
1478 }
1479 EXPORT_SYMBOL(il_setup_rx_scan_handlers);
1480
1481 u16
1482 il_get_active_dwell_time(struct il_priv *il, enum nl80211_band band,
1483 u8 n_probes)
1484 {
1485 if (band == NL80211_BAND_5GHZ)
1486 return IL_ACTIVE_DWELL_TIME_52 +
1487 IL_ACTIVE_DWELL_FACTOR_52GHZ * (n_probes + 1);
1488 else
1489 return IL_ACTIVE_DWELL_TIME_24 +
1490 IL_ACTIVE_DWELL_FACTOR_24GHZ * (n_probes + 1);
1491 }
1492 EXPORT_SYMBOL(il_get_active_dwell_time);
1493
1494 u16
1495 il_get_passive_dwell_time(struct il_priv *il, enum nl80211_band band,
1496 struct ieee80211_vif *vif)
1497 {
1498 u16 value;
1499
1500 u16 passive =
1501 (band ==
1502 NL80211_BAND_2GHZ) ? IL_PASSIVE_DWELL_BASE +
1503 IL_PASSIVE_DWELL_TIME_24 : IL_PASSIVE_DWELL_BASE +
1504 IL_PASSIVE_DWELL_TIME_52;
1505
1506 if (il_is_any_associated(il)) {
1507 /*
1508 * If we're associated, we clamp the maximum passive
1509 * dwell time to be 98% of the smallest beacon interval
1510 * (minus 2 * channel tune time)
1511 */
1512 value = il->vif ? il->vif->bss_conf.beacon_int : 0;
1513 if (value > IL_PASSIVE_DWELL_BASE || !value)
1514 value = IL_PASSIVE_DWELL_BASE;
1515 value = (value * 98) / 100 - IL_CHANNEL_TUNE_TIME * 2;
1516 passive = min(value, passive);
1517 }
1518
1519 return passive;
1520 }
1521 EXPORT_SYMBOL(il_get_passive_dwell_time);
1522
1523 void
1524 il_init_scan_params(struct il_priv *il)
1525 {
1526 u8 ant_idx = fls(il->hw_params.valid_tx_ant) - 1;
1527 if (!il->scan_tx_ant[NL80211_BAND_5GHZ])
1528 il->scan_tx_ant[NL80211_BAND_5GHZ] = ant_idx;
1529 if (!il->scan_tx_ant[NL80211_BAND_2GHZ])
1530 il->scan_tx_ant[NL80211_BAND_2GHZ] = ant_idx;
1531 }
1532 EXPORT_SYMBOL(il_init_scan_params);
1533
1534 static int
1535 il_scan_initiate(struct il_priv *il, struct ieee80211_vif *vif)
1536 {
1537 int ret;
1538
1539 lockdep_assert_held(&il->mutex);
1540
1541 cancel_delayed_work(&il->scan_check);
1542
1543 if (!il_is_ready_rf(il)) {
1544 IL_WARN("Request scan called when driver not ready.\n");
1545 return -EIO;
1546 }
1547
1548 if (test_bit(S_SCAN_HW, &il->status)) {
1549 D_SCAN("Multiple concurrent scan requests in parallel.\n");
1550 return -EBUSY;
1551 }
1552
1553 if (test_bit(S_SCAN_ABORTING, &il->status)) {
1554 D_SCAN("Scan request while abort pending.\n");
1555 return -EBUSY;
1556 }
1557
1558 D_SCAN("Starting scan...\n");
1559
1560 set_bit(S_SCANNING, &il->status);
1561 il->scan_start = jiffies;
1562
1563 ret = il->ops->request_scan(il, vif);
1564 if (ret) {
1565 clear_bit(S_SCANNING, &il->status);
1566 return ret;
1567 }
1568
1569 queue_delayed_work(il->workqueue, &il->scan_check,
1570 IL_SCAN_CHECK_WATCHDOG);
1571
1572 return 0;
1573 }
1574
1575 int
1576 il_mac_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1577 struct ieee80211_scan_request *hw_req)
1578 {
1579 struct cfg80211_scan_request *req = &hw_req->req;
1580 struct il_priv *il = hw->priv;
1581 int ret;
1582
1583 if (req->n_channels == 0) {
1584 IL_ERR("Can not scan on no channels.\n");
1585 return -EINVAL;
1586 }
1587
1588 mutex_lock(&il->mutex);
1589 D_MAC80211("enter\n");
1590
1591 if (test_bit(S_SCANNING, &il->status)) {
1592 D_SCAN("Scan already in progress.\n");
1593 ret = -EAGAIN;
1594 goto out_unlock;
1595 }
1596
1597 /* mac80211 will only ask for one band at a time */
1598 il->scan_request = req;
1599 il->scan_vif = vif;
1600 il->scan_band = req->channels[0]->band;
1601
1602 ret = il_scan_initiate(il, vif);
1603
1604 out_unlock:
1605 D_MAC80211("leave ret %d\n", ret);
1606 mutex_unlock(&il->mutex);
1607
1608 return ret;
1609 }
1610 EXPORT_SYMBOL(il_mac_hw_scan);
1611
1612 static void
1613 il_bg_scan_check(struct work_struct *data)
1614 {
1615 struct il_priv *il =
1616 container_of(data, struct il_priv, scan_check.work);
1617
1618 D_SCAN("Scan check work\n");
1619
1620 /* Since we are here firmware does not finish scan and
1621 * most likely is in bad shape, so we don't bother to
1622 * send abort command, just force scan complete to mac80211 */
1623 mutex_lock(&il->mutex);
1624 il_force_scan_end(il);
1625 mutex_unlock(&il->mutex);
1626 }
1627
1628 /**
1629 * il_fill_probe_req - fill in all required fields and IE for probe request
1630 */
1631
1632 u16
1633 il_fill_probe_req(struct il_priv *il, struct ieee80211_mgmt *frame,
1634 const u8 *ta, const u8 *ies, int ie_len, int left)
1635 {
1636 int len = 0;
1637 u8 *pos = NULL;
1638
1639 /* Make sure there is enough space for the probe request,
1640 * two mandatory IEs and the data */
1641 left -= 24;
1642 if (left < 0)
1643 return 0;
1644
1645 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1646 eth_broadcast_addr(frame->da);
1647 memcpy(frame->sa, ta, ETH_ALEN);
1648 eth_broadcast_addr(frame->bssid);
1649 frame->seq_ctrl = 0;
1650
1651 len += 24;
1652
1653 /* ...next IE... */
1654 pos = &frame->u.probe_req.variable[0];
1655
1656 /* fill in our indirect SSID IE */
1657 left -= 2;
1658 if (left < 0)
1659 return 0;
1660 *pos++ = WLAN_EID_SSID;
1661 *pos++ = 0;
1662
1663 len += 2;
1664
1665 if (WARN_ON(left < ie_len))
1666 return len;
1667
1668 if (ies && ie_len) {
1669 memcpy(pos, ies, ie_len);
1670 len += ie_len;
1671 }
1672
1673 return (u16) len;
1674 }
1675 EXPORT_SYMBOL(il_fill_probe_req);
1676
1677 static void
1678 il_bg_abort_scan(struct work_struct *work)
1679 {
1680 struct il_priv *il = container_of(work, struct il_priv, abort_scan);
1681
1682 D_SCAN("Abort scan work\n");
1683
1684 /* We keep scan_check work queued in case when firmware will not
1685 * report back scan completed notification */
1686 mutex_lock(&il->mutex);
1687 il_scan_cancel_timeout(il, 200);
1688 mutex_unlock(&il->mutex);
1689 }
1690
1691 static void
1692 il_bg_scan_completed(struct work_struct *work)
1693 {
1694 struct il_priv *il = container_of(work, struct il_priv, scan_completed);
1695 bool aborted;
1696
1697 D_SCAN("Completed scan.\n");
1698
1699 cancel_delayed_work(&il->scan_check);
1700
1701 mutex_lock(&il->mutex);
1702
1703 aborted = test_and_clear_bit(S_SCAN_ABORTING, &il->status);
1704 if (aborted)
1705 D_SCAN("Aborted scan completed.\n");
1706
1707 if (!test_and_clear_bit(S_SCANNING, &il->status)) {
1708 D_SCAN("Scan already completed.\n");
1709 goto out_settings;
1710 }
1711
1712 il_complete_scan(il, aborted);
1713
1714 out_settings:
1715 /* Can we still talk to firmware ? */
1716 if (!il_is_ready_rf(il))
1717 goto out;
1718
1719 /*
1720 * We do not commit power settings while scan is pending,
1721 * do it now if the settings changed.
1722 */
1723 il_power_set_mode(il, &il->power_data.sleep_cmd_next, false);
1724 il_set_tx_power(il, il->tx_power_next, false);
1725
1726 il->ops->post_scan(il);
1727
1728 out:
1729 mutex_unlock(&il->mutex);
1730 }
1731
1732 void
1733 il_setup_scan_deferred_work(struct il_priv *il)
1734 {
1735 INIT_WORK(&il->scan_completed, il_bg_scan_completed);
1736 INIT_WORK(&il->abort_scan, il_bg_abort_scan);
1737 INIT_DELAYED_WORK(&il->scan_check, il_bg_scan_check);
1738 }
1739 EXPORT_SYMBOL(il_setup_scan_deferred_work);
1740
1741 void
1742 il_cancel_scan_deferred_work(struct il_priv *il)
1743 {
1744 cancel_work_sync(&il->abort_scan);
1745 cancel_work_sync(&il->scan_completed);
1746
1747 if (cancel_delayed_work_sync(&il->scan_check)) {
1748 mutex_lock(&il->mutex);
1749 il_force_scan_end(il);
1750 mutex_unlock(&il->mutex);
1751 }
1752 }
1753 EXPORT_SYMBOL(il_cancel_scan_deferred_work);
1754
1755 /* il->sta_lock must be held */
1756 static void
1757 il_sta_ucode_activate(struct il_priv *il, u8 sta_id)
1758 {
1759
1760 if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE))
1761 IL_ERR("ACTIVATE a non DRIVER active station id %u addr %pM\n",
1762 sta_id, il->stations[sta_id].sta.sta.addr);
1763
1764 if (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) {
1765 D_ASSOC("STA id %u addr %pM already present"
1766 " in uCode (according to driver)\n", sta_id,
1767 il->stations[sta_id].sta.sta.addr);
1768 } else {
1769 il->stations[sta_id].used |= IL_STA_UCODE_ACTIVE;
1770 D_ASSOC("Added STA id %u addr %pM to uCode\n", sta_id,
1771 il->stations[sta_id].sta.sta.addr);
1772 }
1773 }
1774
1775 static int
1776 il_process_add_sta_resp(struct il_priv *il, struct il_addsta_cmd *addsta,
1777 struct il_rx_pkt *pkt, bool sync)
1778 {
1779 u8 sta_id = addsta->sta.sta_id;
1780 unsigned long flags;
1781 int ret = -EIO;
1782
1783 if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
1784 IL_ERR("Bad return from C_ADD_STA (0x%08X)\n", pkt->hdr.flags);
1785 return ret;
1786 }
1787
1788 D_INFO("Processing response for adding station %u\n", sta_id);
1789
1790 spin_lock_irqsave(&il->sta_lock, flags);
1791
1792 switch (pkt->u.add_sta.status) {
1793 case ADD_STA_SUCCESS_MSK:
1794 D_INFO("C_ADD_STA PASSED\n");
1795 il_sta_ucode_activate(il, sta_id);
1796 ret = 0;
1797 break;
1798 case ADD_STA_NO_ROOM_IN_TBL:
1799 IL_ERR("Adding station %d failed, no room in table.\n", sta_id);
1800 break;
1801 case ADD_STA_NO_BLOCK_ACK_RESOURCE:
1802 IL_ERR("Adding station %d failed, no block ack resource.\n",
1803 sta_id);
1804 break;
1805 case ADD_STA_MODIFY_NON_EXIST_STA:
1806 IL_ERR("Attempting to modify non-existing station %d\n",
1807 sta_id);
1808 break;
1809 default:
1810 D_ASSOC("Received C_ADD_STA:(0x%08X)\n", pkt->u.add_sta.status);
1811 break;
1812 }
1813
1814 D_INFO("%s station id %u addr %pM\n",
1815 il->stations[sta_id].sta.mode ==
1816 STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", sta_id,
1817 il->stations[sta_id].sta.sta.addr);
1818
1819 /*
1820 * XXX: The MAC address in the command buffer is often changed from
1821 * the original sent to the device. That is, the MAC address
1822 * written to the command buffer often is not the same MAC address
1823 * read from the command buffer when the command returns. This
1824 * issue has not yet been resolved and this debugging is left to
1825 * observe the problem.
1826 */
1827 D_INFO("%s station according to cmd buffer %pM\n",
1828 il->stations[sta_id].sta.mode ==
1829 STA_CONTROL_MODIFY_MSK ? "Modified" : "Added", addsta->sta.addr);
1830 spin_unlock_irqrestore(&il->sta_lock, flags);
1831
1832 return ret;
1833 }
1834
1835 static void
1836 il_add_sta_callback(struct il_priv *il, struct il_device_cmd *cmd,
1837 struct il_rx_pkt *pkt)
1838 {
1839 struct il_addsta_cmd *addsta = (struct il_addsta_cmd *)cmd->cmd.payload;
1840
1841 il_process_add_sta_resp(il, addsta, pkt, false);
1842
1843 }
1844
1845 int
1846 il_send_add_sta(struct il_priv *il, struct il_addsta_cmd *sta, u8 flags)
1847 {
1848 struct il_rx_pkt *pkt = NULL;
1849 int ret = 0;
1850 u8 data[sizeof(*sta)];
1851 struct il_host_cmd cmd = {
1852 .id = C_ADD_STA,
1853 .flags = flags,
1854 .data = data,
1855 };
1856 u8 sta_id __maybe_unused = sta->sta.sta_id;
1857
1858 D_INFO("Adding sta %u (%pM) %ssynchronously\n", sta_id, sta->sta.addr,
1859 flags & CMD_ASYNC ? "a" : "");
1860
1861 if (flags & CMD_ASYNC)
1862 cmd.callback = il_add_sta_callback;
1863 else {
1864 cmd.flags |= CMD_WANT_SKB;
1865 might_sleep();
1866 }
1867
1868 cmd.len = il->ops->build_addsta_hcmd(sta, data);
1869 ret = il_send_cmd(il, &cmd);
1870 if (ret)
1871 return ret;
1872 if (flags & CMD_ASYNC)
1873 return 0;
1874
1875 pkt = (struct il_rx_pkt *)cmd.reply_page;
1876 ret = il_process_add_sta_resp(il, sta, pkt, true);
1877
1878 il_free_pages(il, cmd.reply_page);
1879
1880 return ret;
1881 }
1882 EXPORT_SYMBOL(il_send_add_sta);
1883
1884 static void
1885 il_set_ht_add_station(struct il_priv *il, u8 idx, struct ieee80211_sta *sta)
1886 {
1887 struct ieee80211_sta_ht_cap *sta_ht_inf = &sta->ht_cap;
1888 __le32 sta_flags;
1889
1890 if (!sta || !sta_ht_inf->ht_supported)
1891 goto done;
1892
1893 D_ASSOC("spatial multiplexing power save mode: %s\n",
1894 (sta->smps_mode == IEEE80211_SMPS_STATIC) ? "static" :
1895 (sta->smps_mode == IEEE80211_SMPS_DYNAMIC) ? "dynamic" :
1896 "disabled");
1897
1898 sta_flags = il->stations[idx].sta.station_flags;
1899
1900 sta_flags &= ~(STA_FLG_RTS_MIMO_PROT_MSK | STA_FLG_MIMO_DIS_MSK);
1901
1902 switch (sta->smps_mode) {
1903 case IEEE80211_SMPS_STATIC:
1904 sta_flags |= STA_FLG_MIMO_DIS_MSK;
1905 break;
1906 case IEEE80211_SMPS_DYNAMIC:
1907 sta_flags |= STA_FLG_RTS_MIMO_PROT_MSK;
1908 break;
1909 case IEEE80211_SMPS_OFF:
1910 break;
1911 default:
1912 IL_WARN("Invalid MIMO PS mode %d\n", sta->smps_mode);
1913 break;
1914 }
1915
1916 sta_flags |=
1917 cpu_to_le32((u32) sta_ht_inf->
1918 ampdu_factor << STA_FLG_MAX_AGG_SIZE_POS);
1919
1920 sta_flags |=
1921 cpu_to_le32((u32) sta_ht_inf->
1922 ampdu_density << STA_FLG_AGG_MPDU_DENSITY_POS);
1923
1924 if (il_is_ht40_tx_allowed(il, &sta->ht_cap))
1925 sta_flags |= STA_FLG_HT40_EN_MSK;
1926 else
1927 sta_flags &= ~STA_FLG_HT40_EN_MSK;
1928
1929 il->stations[idx].sta.station_flags = sta_flags;
1930 done:
1931 return;
1932 }
1933
1934 /**
1935 * il_prep_station - Prepare station information for addition
1936 *
1937 * should be called with sta_lock held
1938 */
1939 u8
1940 il_prep_station(struct il_priv *il, const u8 *addr, bool is_ap,
1941 struct ieee80211_sta *sta)
1942 {
1943 struct il_station_entry *station;
1944 int i;
1945 u8 sta_id = IL_INVALID_STATION;
1946 u16 rate;
1947
1948 if (is_ap)
1949 sta_id = IL_AP_ID;
1950 else if (is_broadcast_ether_addr(addr))
1951 sta_id = il->hw_params.bcast_id;
1952 else
1953 for (i = IL_STA_ID; i < il->hw_params.max_stations; i++) {
1954 if (ether_addr_equal(il->stations[i].sta.sta.addr,
1955 addr)) {
1956 sta_id = i;
1957 break;
1958 }
1959
1960 if (!il->stations[i].used &&
1961 sta_id == IL_INVALID_STATION)
1962 sta_id = i;
1963 }
1964
1965 /*
1966 * These two conditions have the same outcome, but keep them
1967 * separate
1968 */
1969 if (unlikely(sta_id == IL_INVALID_STATION))
1970 return sta_id;
1971
1972 /*
1973 * uCode is not able to deal with multiple requests to add a
1974 * station. Keep track if one is in progress so that we do not send
1975 * another.
1976 */
1977 if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
1978 D_INFO("STA %d already in process of being added.\n", sta_id);
1979 return sta_id;
1980 }
1981
1982 if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
1983 (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE) &&
1984 ether_addr_equal(il->stations[sta_id].sta.sta.addr, addr)) {
1985 D_ASSOC("STA %d (%pM) already added, not adding again.\n",
1986 sta_id, addr);
1987 return sta_id;
1988 }
1989
1990 station = &il->stations[sta_id];
1991 station->used = IL_STA_DRIVER_ACTIVE;
1992 D_ASSOC("Add STA to driver ID %d: %pM\n", sta_id, addr);
1993 il->num_stations++;
1994
1995 /* Set up the C_ADD_STA command to send to device */
1996 memset(&station->sta, 0, sizeof(struct il_addsta_cmd));
1997 memcpy(station->sta.sta.addr, addr, ETH_ALEN);
1998 station->sta.mode = 0;
1999 station->sta.sta.sta_id = sta_id;
2000 station->sta.station_flags = 0;
2001
2002 /*
2003 * OK to call unconditionally, since local stations (IBSS BSSID
2004 * STA and broadcast STA) pass in a NULL sta, and mac80211
2005 * doesn't allow HT IBSS.
2006 */
2007 il_set_ht_add_station(il, sta_id, sta);
2008
2009 /* 3945 only */
2010 rate = (il->band == NL80211_BAND_5GHZ) ? RATE_6M_PLCP : RATE_1M_PLCP;
2011 /* Turn on both antennas for the station... */
2012 station->sta.rate_n_flags = cpu_to_le16(rate | RATE_MCS_ANT_AB_MSK);
2013
2014 return sta_id;
2015
2016 }
2017 EXPORT_SYMBOL_GPL(il_prep_station);
2018
2019 #define STA_WAIT_TIMEOUT (HZ/2)
2020
2021 /**
2022 * il_add_station_common -
2023 */
2024 int
2025 il_add_station_common(struct il_priv *il, const u8 *addr, bool is_ap,
2026 struct ieee80211_sta *sta, u8 *sta_id_r)
2027 {
2028 unsigned long flags_spin;
2029 int ret = 0;
2030 u8 sta_id;
2031 struct il_addsta_cmd sta_cmd;
2032
2033 *sta_id_r = 0;
2034 spin_lock_irqsave(&il->sta_lock, flags_spin);
2035 sta_id = il_prep_station(il, addr, is_ap, sta);
2036 if (sta_id == IL_INVALID_STATION) {
2037 IL_ERR("Unable to prepare station %pM for addition\n", addr);
2038 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2039 return -EINVAL;
2040 }
2041
2042 /*
2043 * uCode is not able to deal with multiple requests to add a
2044 * station. Keep track if one is in progress so that we do not send
2045 * another.
2046 */
2047 if (il->stations[sta_id].used & IL_STA_UCODE_INPROGRESS) {
2048 D_INFO("STA %d already in process of being added.\n", sta_id);
2049 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2050 return -EEXIST;
2051 }
2052
2053 if ((il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE) &&
2054 (il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2055 D_ASSOC("STA %d (%pM) already added, not adding again.\n",
2056 sta_id, addr);
2057 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2058 return -EEXIST;
2059 }
2060
2061 il->stations[sta_id].used |= IL_STA_UCODE_INPROGRESS;
2062 memcpy(&sta_cmd, &il->stations[sta_id].sta,
2063 sizeof(struct il_addsta_cmd));
2064 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2065
2066 /* Add station to device's station table */
2067 ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2068 if (ret) {
2069 spin_lock_irqsave(&il->sta_lock, flags_spin);
2070 IL_ERR("Adding station %pM failed.\n",
2071 il->stations[sta_id].sta.sta.addr);
2072 il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2073 il->stations[sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2074 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2075 }
2076 *sta_id_r = sta_id;
2077 return ret;
2078 }
2079 EXPORT_SYMBOL(il_add_station_common);
2080
2081 /**
2082 * il_sta_ucode_deactivate - deactivate ucode status for a station
2083 *
2084 * il->sta_lock must be held
2085 */
2086 static void
2087 il_sta_ucode_deactivate(struct il_priv *il, u8 sta_id)
2088 {
2089 /* Ucode must be active and driver must be non active */
2090 if ((il->stations[sta_id].
2091 used & (IL_STA_UCODE_ACTIVE | IL_STA_DRIVER_ACTIVE)) !=
2092 IL_STA_UCODE_ACTIVE)
2093 IL_ERR("removed non active STA %u\n", sta_id);
2094
2095 il->stations[sta_id].used &= ~IL_STA_UCODE_ACTIVE;
2096
2097 memset(&il->stations[sta_id], 0, sizeof(struct il_station_entry));
2098 D_ASSOC("Removed STA %u\n", sta_id);
2099 }
2100
2101 static int
2102 il_send_remove_station(struct il_priv *il, const u8 * addr, int sta_id,
2103 bool temporary)
2104 {
2105 struct il_rx_pkt *pkt;
2106 int ret;
2107
2108 unsigned long flags_spin;
2109 struct il_rem_sta_cmd rm_sta_cmd;
2110
2111 struct il_host_cmd cmd = {
2112 .id = C_REM_STA,
2113 .len = sizeof(struct il_rem_sta_cmd),
2114 .flags = CMD_SYNC,
2115 .data = &rm_sta_cmd,
2116 };
2117
2118 memset(&rm_sta_cmd, 0, sizeof(rm_sta_cmd));
2119 rm_sta_cmd.num_sta = 1;
2120 memcpy(&rm_sta_cmd.addr, addr, ETH_ALEN);
2121
2122 cmd.flags |= CMD_WANT_SKB;
2123
2124 ret = il_send_cmd(il, &cmd);
2125
2126 if (ret)
2127 return ret;
2128
2129 pkt = (struct il_rx_pkt *)cmd.reply_page;
2130 if (pkt->hdr.flags & IL_CMD_FAILED_MSK) {
2131 IL_ERR("Bad return from C_REM_STA (0x%08X)\n", pkt->hdr.flags);
2132 ret = -EIO;
2133 }
2134
2135 if (!ret) {
2136 switch (pkt->u.rem_sta.status) {
2137 case REM_STA_SUCCESS_MSK:
2138 if (!temporary) {
2139 spin_lock_irqsave(&il->sta_lock, flags_spin);
2140 il_sta_ucode_deactivate(il, sta_id);
2141 spin_unlock_irqrestore(&il->sta_lock,
2142 flags_spin);
2143 }
2144 D_ASSOC("C_REM_STA PASSED\n");
2145 break;
2146 default:
2147 ret = -EIO;
2148 IL_ERR("C_REM_STA failed\n");
2149 break;
2150 }
2151 }
2152 il_free_pages(il, cmd.reply_page);
2153
2154 return ret;
2155 }
2156
2157 /**
2158 * il_remove_station - Remove driver's knowledge of station.
2159 */
2160 int
2161 il_remove_station(struct il_priv *il, const u8 sta_id, const u8 * addr)
2162 {
2163 unsigned long flags;
2164
2165 if (!il_is_ready(il)) {
2166 D_INFO("Unable to remove station %pM, device not ready.\n",
2167 addr);
2168 /*
2169 * It is typical for stations to be removed when we are
2170 * going down. Return success since device will be down
2171 * soon anyway
2172 */
2173 return 0;
2174 }
2175
2176 D_ASSOC("Removing STA from driver:%d %pM\n", sta_id, addr);
2177
2178 if (WARN_ON(sta_id == IL_INVALID_STATION))
2179 return -EINVAL;
2180
2181 spin_lock_irqsave(&il->sta_lock, flags);
2182
2183 if (!(il->stations[sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2184 D_INFO("Removing %pM but non DRIVER active\n", addr);
2185 goto out_err;
2186 }
2187
2188 if (!(il->stations[sta_id].used & IL_STA_UCODE_ACTIVE)) {
2189 D_INFO("Removing %pM but non UCODE active\n", addr);
2190 goto out_err;
2191 }
2192
2193 if (il->stations[sta_id].used & IL_STA_LOCAL) {
2194 kfree(il->stations[sta_id].lq);
2195 il->stations[sta_id].lq = NULL;
2196 }
2197
2198 il->stations[sta_id].used &= ~IL_STA_DRIVER_ACTIVE;
2199
2200 il->num_stations--;
2201
2202 BUG_ON(il->num_stations < 0);
2203
2204 spin_unlock_irqrestore(&il->sta_lock, flags);
2205
2206 return il_send_remove_station(il, addr, sta_id, false);
2207 out_err:
2208 spin_unlock_irqrestore(&il->sta_lock, flags);
2209 return -EINVAL;
2210 }
2211 EXPORT_SYMBOL_GPL(il_remove_station);
2212
2213 /**
2214 * il_clear_ucode_stations - clear ucode station table bits
2215 *
2216 * This function clears all the bits in the driver indicating
2217 * which stations are active in the ucode. Call when something
2218 * other than explicit station management would cause this in
2219 * the ucode, e.g. unassociated RXON.
2220 */
2221 void
2222 il_clear_ucode_stations(struct il_priv *il)
2223 {
2224 int i;
2225 unsigned long flags_spin;
2226 bool cleared = false;
2227
2228 D_INFO("Clearing ucode stations in driver\n");
2229
2230 spin_lock_irqsave(&il->sta_lock, flags_spin);
2231 for (i = 0; i < il->hw_params.max_stations; i++) {
2232 if (il->stations[i].used & IL_STA_UCODE_ACTIVE) {
2233 D_INFO("Clearing ucode active for station %d\n", i);
2234 il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2235 cleared = true;
2236 }
2237 }
2238 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2239
2240 if (!cleared)
2241 D_INFO("No active stations found to be cleared\n");
2242 }
2243 EXPORT_SYMBOL(il_clear_ucode_stations);
2244
2245 /**
2246 * il_restore_stations() - Restore driver known stations to device
2247 *
2248 * All stations considered active by driver, but not present in ucode, is
2249 * restored.
2250 *
2251 * Function sleeps.
2252 */
2253 void
2254 il_restore_stations(struct il_priv *il)
2255 {
2256 struct il_addsta_cmd sta_cmd;
2257 struct il_link_quality_cmd lq;
2258 unsigned long flags_spin;
2259 int i;
2260 bool found = false;
2261 int ret;
2262 bool send_lq;
2263
2264 if (!il_is_ready(il)) {
2265 D_INFO("Not ready yet, not restoring any stations.\n");
2266 return;
2267 }
2268
2269 D_ASSOC("Restoring all known stations ... start.\n");
2270 spin_lock_irqsave(&il->sta_lock, flags_spin);
2271 for (i = 0; i < il->hw_params.max_stations; i++) {
2272 if ((il->stations[i].used & IL_STA_DRIVER_ACTIVE) &&
2273 !(il->stations[i].used & IL_STA_UCODE_ACTIVE)) {
2274 D_ASSOC("Restoring sta %pM\n",
2275 il->stations[i].sta.sta.addr);
2276 il->stations[i].sta.mode = 0;
2277 il->stations[i].used |= IL_STA_UCODE_INPROGRESS;
2278 found = true;
2279 }
2280 }
2281
2282 for (i = 0; i < il->hw_params.max_stations; i++) {
2283 if ((il->stations[i].used & IL_STA_UCODE_INPROGRESS)) {
2284 memcpy(&sta_cmd, &il->stations[i].sta,
2285 sizeof(struct il_addsta_cmd));
2286 send_lq = false;
2287 if (il->stations[i].lq) {
2288 memcpy(&lq, il->stations[i].lq,
2289 sizeof(struct il_link_quality_cmd));
2290 send_lq = true;
2291 }
2292 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2293 ret = il_send_add_sta(il, &sta_cmd, CMD_SYNC);
2294 if (ret) {
2295 spin_lock_irqsave(&il->sta_lock, flags_spin);
2296 IL_ERR("Adding station %pM failed.\n",
2297 il->stations[i].sta.sta.addr);
2298 il->stations[i].used &= ~IL_STA_DRIVER_ACTIVE;
2299 il->stations[i].used &=
2300 ~IL_STA_UCODE_INPROGRESS;
2301 spin_unlock_irqrestore(&il->sta_lock,
2302 flags_spin);
2303 }
2304 /*
2305 * Rate scaling has already been initialized, send
2306 * current LQ command
2307 */
2308 if (send_lq)
2309 il_send_lq_cmd(il, &lq, CMD_SYNC, true);
2310 spin_lock_irqsave(&il->sta_lock, flags_spin);
2311 il->stations[i].used &= ~IL_STA_UCODE_INPROGRESS;
2312 }
2313 }
2314
2315 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2316 if (!found)
2317 D_INFO("Restoring all known stations"
2318 " .... no stations to be restored.\n");
2319 else
2320 D_INFO("Restoring all known stations" " .... complete.\n");
2321 }
2322 EXPORT_SYMBOL(il_restore_stations);
2323
2324 int
2325 il_get_free_ucode_key_idx(struct il_priv *il)
2326 {
2327 int i;
2328
2329 for (i = 0; i < il->sta_key_max_num; i++)
2330 if (!test_and_set_bit(i, &il->ucode_key_table))
2331 return i;
2332
2333 return WEP_INVALID_OFFSET;
2334 }
2335 EXPORT_SYMBOL(il_get_free_ucode_key_idx);
2336
2337 void
2338 il_dealloc_bcast_stations(struct il_priv *il)
2339 {
2340 unsigned long flags;
2341 int i;
2342
2343 spin_lock_irqsave(&il->sta_lock, flags);
2344 for (i = 0; i < il->hw_params.max_stations; i++) {
2345 if (!(il->stations[i].used & IL_STA_BCAST))
2346 continue;
2347
2348 il->stations[i].used &= ~IL_STA_UCODE_ACTIVE;
2349 il->num_stations--;
2350 BUG_ON(il->num_stations < 0);
2351 kfree(il->stations[i].lq);
2352 il->stations[i].lq = NULL;
2353 }
2354 spin_unlock_irqrestore(&il->sta_lock, flags);
2355 }
2356 EXPORT_SYMBOL_GPL(il_dealloc_bcast_stations);
2357
2358 #ifdef CONFIG_IWLEGACY_DEBUG
2359 static void
2360 il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq)
2361 {
2362 int i;
2363 D_RATE("lq station id 0x%x\n", lq->sta_id);
2364 D_RATE("lq ant 0x%X 0x%X\n", lq->general_params.single_stream_ant_msk,
2365 lq->general_params.dual_stream_ant_msk);
2366
2367 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++)
2368 D_RATE("lq idx %d 0x%X\n", i, lq->rs_table[i].rate_n_flags);
2369 }
2370 #else
2371 static inline void
2372 il_dump_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq)
2373 {
2374 }
2375 #endif
2376
2377 /**
2378 * il_is_lq_table_valid() - Test one aspect of LQ cmd for validity
2379 *
2380 * It sometimes happens when a HT rate has been in use and we
2381 * loose connectivity with AP then mac80211 will first tell us that the
2382 * current channel is not HT anymore before removing the station. In such a
2383 * scenario the RXON flags will be updated to indicate we are not
2384 * communicating HT anymore, but the LQ command may still contain HT rates.
2385 * Test for this to prevent driver from sending LQ command between the time
2386 * RXON flags are updated and when LQ command is updated.
2387 */
2388 static bool
2389 il_is_lq_table_valid(struct il_priv *il, struct il_link_quality_cmd *lq)
2390 {
2391 int i;
2392
2393 if (il->ht.enabled)
2394 return true;
2395
2396 D_INFO("Channel %u is not an HT channel\n", il->active.channel);
2397 for (i = 0; i < LINK_QUAL_MAX_RETRY_NUM; i++) {
2398 if (le32_to_cpu(lq->rs_table[i].rate_n_flags) & RATE_MCS_HT_MSK) {
2399 D_INFO("idx %d of LQ expects HT channel\n", i);
2400 return false;
2401 }
2402 }
2403 return true;
2404 }
2405
2406 /**
2407 * il_send_lq_cmd() - Send link quality command
2408 * @init: This command is sent as part of station initialization right
2409 * after station has been added.
2410 *
2411 * The link quality command is sent as the last step of station creation.
2412 * This is the special case in which init is set and we call a callback in
2413 * this case to clear the state indicating that station creation is in
2414 * progress.
2415 */
2416 int
2417 il_send_lq_cmd(struct il_priv *il, struct il_link_quality_cmd *lq,
2418 u8 flags, bool init)
2419 {
2420 int ret = 0;
2421 unsigned long flags_spin;
2422
2423 struct il_host_cmd cmd = {
2424 .id = C_TX_LINK_QUALITY_CMD,
2425 .len = sizeof(struct il_link_quality_cmd),
2426 .flags = flags,
2427 .data = lq,
2428 };
2429
2430 if (WARN_ON(lq->sta_id == IL_INVALID_STATION))
2431 return -EINVAL;
2432
2433 spin_lock_irqsave(&il->sta_lock, flags_spin);
2434 if (!(il->stations[lq->sta_id].used & IL_STA_DRIVER_ACTIVE)) {
2435 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2436 return -EINVAL;
2437 }
2438 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2439
2440 il_dump_lq_cmd(il, lq);
2441 BUG_ON(init && (cmd.flags & CMD_ASYNC));
2442
2443 if (il_is_lq_table_valid(il, lq))
2444 ret = il_send_cmd(il, &cmd);
2445 else
2446 ret = -EINVAL;
2447
2448 if (cmd.flags & CMD_ASYNC)
2449 return ret;
2450
2451 if (init) {
2452 D_INFO("init LQ command complete,"
2453 " clearing sta addition status for sta %d\n",
2454 lq->sta_id);
2455 spin_lock_irqsave(&il->sta_lock, flags_spin);
2456 il->stations[lq->sta_id].used &= ~IL_STA_UCODE_INPROGRESS;
2457 spin_unlock_irqrestore(&il->sta_lock, flags_spin);
2458 }
2459 return ret;
2460 }
2461 EXPORT_SYMBOL(il_send_lq_cmd);
2462
2463 int
2464 il_mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2465 struct ieee80211_sta *sta)
2466 {
2467 struct il_priv *il = hw->priv;
2468 struct il_station_priv_common *sta_common = (void *)sta->drv_priv;
2469 int ret;
2470
2471 mutex_lock(&il->mutex);
2472 D_MAC80211("enter station %pM\n", sta->addr);
2473
2474 ret = il_remove_station(il, sta_common->sta_id, sta->addr);
2475 if (ret)
2476 IL_ERR("Error removing station %pM\n", sta->addr);
2477
2478 D_MAC80211("leave ret %d\n", ret);
2479 mutex_unlock(&il->mutex);
2480
2481 return ret;
2482 }
2483 EXPORT_SYMBOL(il_mac_sta_remove);
2484
2485 /************************** RX-FUNCTIONS ****************************/
2486 /*
2487 * Rx theory of operation
2488 *
2489 * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
2490 * each of which point to Receive Buffers to be filled by the NIC. These get
2491 * used not only for Rx frames, but for any command response or notification
2492 * from the NIC. The driver and NIC manage the Rx buffers by means
2493 * of idxes into the circular buffer.
2494 *
2495 * Rx Queue Indexes
2496 * The host/firmware share two idx registers for managing the Rx buffers.
2497 *
2498 * The READ idx maps to the first position that the firmware may be writing
2499 * to -- the driver can read up to (but not including) this position and get
2500 * good data.
2501 * The READ idx is managed by the firmware once the card is enabled.
2502 *
2503 * The WRITE idx maps to the last position the driver has read from -- the
2504 * position preceding WRITE is the last slot the firmware can place a packet.
2505 *
2506 * The queue is empty (no good data) if WRITE = READ - 1, and is full if
2507 * WRITE = READ.
2508 *
2509 * During initialization, the host sets up the READ queue position to the first
2510 * IDX position, and WRITE to the last (READ - 1 wrapped)
2511 *
2512 * When the firmware places a packet in a buffer, it will advance the READ idx
2513 * and fire the RX interrupt. The driver can then query the READ idx and
2514 * process as many packets as possible, moving the WRITE idx forward as it
2515 * resets the Rx queue buffers with new memory.
2516 *
2517 * The management in the driver is as follows:
2518 * + A list of pre-allocated SKBs is stored in iwl->rxq->rx_free. When
2519 * iwl->rxq->free_count drops to or below RX_LOW_WATERMARK, work is scheduled
2520 * to replenish the iwl->rxq->rx_free.
2521 * + In il_rx_replenish (scheduled) if 'processed' != 'read' then the
2522 * iwl->rxq is replenished and the READ IDX is updated (updating the
2523 * 'processed' and 'read' driver idxes as well)
2524 * + A received packet is processed and handed to the kernel network stack,
2525 * detached from the iwl->rxq. The driver 'processed' idx is updated.
2526 * + The Host/Firmware iwl->rxq is replenished at tasklet time from the rx_free
2527 * list. If there are no allocated buffers in iwl->rxq->rx_free, the READ
2528 * IDX is not incremented and iwl->status(RX_STALLED) is set. If there
2529 * were enough free buffers and RX_STALLED is set it is cleared.
2530 *
2531 *
2532 * Driver sequence:
2533 *
2534 * il_rx_queue_alloc() Allocates rx_free
2535 * il_rx_replenish() Replenishes rx_free list from rx_used, and calls
2536 * il_rx_queue_restock
2537 * il_rx_queue_restock() Moves available buffers from rx_free into Rx
2538 * queue, updates firmware pointers, and updates
2539 * the WRITE idx. If insufficient rx_free buffers
2540 * are available, schedules il_rx_replenish
2541 *
2542 * -- enable interrupts --
2543 * ISR - il_rx() Detach il_rx_bufs from pool up to the
2544 * READ IDX, detaching the SKB from the pool.
2545 * Moves the packet buffer from queue to rx_used.
2546 * Calls il_rx_queue_restock to refill any empty
2547 * slots.
2548 * ...
2549 *
2550 */
2551
2552 /**
2553 * il_rx_queue_space - Return number of free slots available in queue.
2554 */
2555 int
2556 il_rx_queue_space(const struct il_rx_queue *q)
2557 {
2558 int s = q->read - q->write;
2559 if (s <= 0)
2560 s += RX_QUEUE_SIZE;
2561 /* keep some buffer to not confuse full and empty queue */
2562 s -= 2;
2563 if (s < 0)
2564 s = 0;
2565 return s;
2566 }
2567 EXPORT_SYMBOL(il_rx_queue_space);
2568
2569 /**
2570 * il_rx_queue_update_write_ptr - Update the write pointer for the RX queue
2571 */
2572 void
2573 il_rx_queue_update_write_ptr(struct il_priv *il, struct il_rx_queue *q)
2574 {
2575 unsigned long flags;
2576 u32 rx_wrt_ptr_reg = il->hw_params.rx_wrt_ptr_reg;
2577 u32 reg;
2578
2579 spin_lock_irqsave(&q->lock, flags);
2580
2581 if (q->need_update == 0)
2582 goto exit_unlock;
2583
2584 /* If power-saving is in use, make sure device is awake */
2585 if (test_bit(S_POWER_PMI, &il->status)) {
2586 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2587
2588 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2589 D_INFO("Rx queue requesting wakeup," " GP1 = 0x%x\n",
2590 reg);
2591 il_set_bit(il, CSR_GP_CNTRL,
2592 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2593 goto exit_unlock;
2594 }
2595
2596 q->write_actual = (q->write & ~0x7);
2597 il_wr(il, rx_wrt_ptr_reg, q->write_actual);
2598
2599 /* Else device is assumed to be awake */
2600 } else {
2601 /* Device expects a multiple of 8 */
2602 q->write_actual = (q->write & ~0x7);
2603 il_wr(il, rx_wrt_ptr_reg, q->write_actual);
2604 }
2605
2606 q->need_update = 0;
2607
2608 exit_unlock:
2609 spin_unlock_irqrestore(&q->lock, flags);
2610 }
2611 EXPORT_SYMBOL(il_rx_queue_update_write_ptr);
2612
2613 int
2614 il_rx_queue_alloc(struct il_priv *il)
2615 {
2616 struct il_rx_queue *rxq = &il->rxq;
2617 struct device *dev = &il->pci_dev->dev;
2618 int i;
2619
2620 spin_lock_init(&rxq->lock);
2621 INIT_LIST_HEAD(&rxq->rx_free);
2622 INIT_LIST_HEAD(&rxq->rx_used);
2623
2624 /* Alloc the circular buffer of Read Buffer Descriptors (RBDs) */
2625 rxq->bd = dma_alloc_coherent(dev, 4 * RX_QUEUE_SIZE, &rxq->bd_dma,
2626 GFP_KERNEL);
2627 if (!rxq->bd)
2628 goto err_bd;
2629
2630 rxq->rb_stts = dma_alloc_coherent(dev, sizeof(struct il_rb_status),
2631 &rxq->rb_stts_dma, GFP_KERNEL);
2632 if (!rxq->rb_stts)
2633 goto err_rb;
2634
2635 /* Fill the rx_used queue with _all_ of the Rx buffers */
2636 for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++)
2637 list_add_tail(&rxq->pool[i].list, &rxq->rx_used);
2638
2639 /* Set us so that we have processed and used all buffers, but have
2640 * not restocked the Rx queue with fresh buffers */
2641 rxq->read = rxq->write = 0;
2642 rxq->write_actual = 0;
2643 rxq->free_count = 0;
2644 rxq->need_update = 0;
2645 return 0;
2646
2647 err_rb:
2648 dma_free_coherent(&il->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd,
2649 rxq->bd_dma);
2650 err_bd:
2651 return -ENOMEM;
2652 }
2653 EXPORT_SYMBOL(il_rx_queue_alloc);
2654
2655 void
2656 il_hdl_spectrum_measurement(struct il_priv *il, struct il_rx_buf *rxb)
2657 {
2658 struct il_rx_pkt *pkt = rxb_addr(rxb);
2659 struct il_spectrum_notification *report = &(pkt->u.spectrum_notif);
2660
2661 if (!report->state) {
2662 D_11H("Spectrum Measure Notification: Start\n");
2663 return;
2664 }
2665
2666 memcpy(&il->measure_report, report, sizeof(*report));
2667 il->measurement_status |= MEASUREMENT_READY;
2668 }
2669 EXPORT_SYMBOL(il_hdl_spectrum_measurement);
2670
2671 /*
2672 * returns non-zero if packet should be dropped
2673 */
2674 int
2675 il_set_decrypted_flag(struct il_priv *il, struct ieee80211_hdr *hdr,
2676 u32 decrypt_res, struct ieee80211_rx_status *stats)
2677 {
2678 u16 fc = le16_to_cpu(hdr->frame_control);
2679
2680 /*
2681 * All contexts have the same setting here due to it being
2682 * a module parameter, so OK to check any context.
2683 */
2684 if (il->active.filter_flags & RXON_FILTER_DIS_DECRYPT_MSK)
2685 return 0;
2686
2687 if (!(fc & IEEE80211_FCTL_PROTECTED))
2688 return 0;
2689
2690 D_RX("decrypt_res:0x%x\n", decrypt_res);
2691 switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
2692 case RX_RES_STATUS_SEC_TYPE_TKIP:
2693 /* The uCode has got a bad phase 1 Key, pushes the packet.
2694 * Decryption will be done in SW. */
2695 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2696 RX_RES_STATUS_BAD_KEY_TTAK)
2697 break;
2698
2699 case RX_RES_STATUS_SEC_TYPE_WEP:
2700 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2701 RX_RES_STATUS_BAD_ICV_MIC) {
2702 /* bad ICV, the packet is destroyed since the
2703 * decryption is inplace, drop it */
2704 D_RX("Packet destroyed\n");
2705 return -1;
2706 }
2707 case RX_RES_STATUS_SEC_TYPE_CCMP:
2708 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
2709 RX_RES_STATUS_DECRYPT_OK) {
2710 D_RX("hw decrypt successfully!!!\n");
2711 stats->flag |= RX_FLAG_DECRYPTED;
2712 }
2713 break;
2714
2715 default:
2716 break;
2717 }
2718 return 0;
2719 }
2720 EXPORT_SYMBOL(il_set_decrypted_flag);
2721
2722 /**
2723 * il_txq_update_write_ptr - Send new write idx to hardware
2724 */
2725 void
2726 il_txq_update_write_ptr(struct il_priv *il, struct il_tx_queue *txq)
2727 {
2728 u32 reg = 0;
2729 int txq_id = txq->q.id;
2730
2731 if (txq->need_update == 0)
2732 return;
2733
2734 /* if we're trying to save power */
2735 if (test_bit(S_POWER_PMI, &il->status)) {
2736 /* wake up nic if it's powered down ...
2737 * uCode will wake up, and interrupt us again, so next
2738 * time we'll skip this part. */
2739 reg = _il_rd(il, CSR_UCODE_DRV_GP1);
2740
2741 if (reg & CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP) {
2742 D_INFO("Tx queue %d requesting wakeup," " GP1 = 0x%x\n",
2743 txq_id, reg);
2744 il_set_bit(il, CSR_GP_CNTRL,
2745 CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
2746 return;
2747 }
2748
2749 il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8));
2750
2751 /*
2752 * else not in power-save mode,
2753 * uCode will never sleep when we're
2754 * trying to tx (during RFKILL, we're not trying to tx).
2755 */
2756 } else
2757 _il_wr(il, HBUS_TARG_WRPTR, txq->q.write_ptr | (txq_id << 8));
2758 txq->need_update = 0;
2759 }
2760 EXPORT_SYMBOL(il_txq_update_write_ptr);
2761
2762 /**
2763 * il_tx_queue_unmap - Unmap any remaining DMA mappings and free skb's
2764 */
2765 void
2766 il_tx_queue_unmap(struct il_priv *il, int txq_id)
2767 {
2768 struct il_tx_queue *txq = &il->txq[txq_id];
2769 struct il_queue *q = &txq->q;
2770
2771 if (q->n_bd == 0)
2772 return;
2773
2774 while (q->write_ptr != q->read_ptr) {
2775 il->ops->txq_free_tfd(il, txq);
2776 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2777 }
2778 }
2779 EXPORT_SYMBOL(il_tx_queue_unmap);
2780
2781 /**
2782 * il_tx_queue_free - Deallocate DMA queue.
2783 * @txq: Transmit queue to deallocate.
2784 *
2785 * Empty queue by removing and destroying all BD's.
2786 * Free all buffers.
2787 * 0-fill, but do not free "txq" descriptor structure.
2788 */
2789 void
2790 il_tx_queue_free(struct il_priv *il, int txq_id)
2791 {
2792 struct il_tx_queue *txq = &il->txq[txq_id];
2793 struct device *dev = &il->pci_dev->dev;
2794 int i;
2795
2796 il_tx_queue_unmap(il, txq_id);
2797
2798 /* De-alloc array of command/tx buffers */
2799 if (txq->cmd) {
2800 for (i = 0; i < TFD_TX_CMD_SLOTS; i++)
2801 kfree(txq->cmd[i]);
2802 }
2803
2804 /* De-alloc circular buffer of TFDs */
2805 if (txq->q.n_bd)
2806 dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2807 txq->tfds, txq->q.dma_addr);
2808
2809 /* De-alloc array of per-TFD driver data */
2810 kfree(txq->skbs);
2811 txq->skbs = NULL;
2812
2813 /* deallocate arrays */
2814 kfree(txq->cmd);
2815 kfree(txq->meta);
2816 txq->cmd = NULL;
2817 txq->meta = NULL;
2818
2819 /* 0-fill queue descriptor structure */
2820 memset(txq, 0, sizeof(*txq));
2821 }
2822 EXPORT_SYMBOL(il_tx_queue_free);
2823
2824 /**
2825 * il_cmd_queue_unmap - Unmap any remaining DMA mappings from command queue
2826 */
2827 void
2828 il_cmd_queue_unmap(struct il_priv *il)
2829 {
2830 struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2831 struct il_queue *q = &txq->q;
2832 int i;
2833
2834 if (q->n_bd == 0)
2835 return;
2836
2837 while (q->read_ptr != q->write_ptr) {
2838 i = il_get_cmd_idx(q, q->read_ptr, 0);
2839
2840 if (txq->meta[i].flags & CMD_MAPPED) {
2841 pci_unmap_single(il->pci_dev,
2842 dma_unmap_addr(&txq->meta[i], mapping),
2843 dma_unmap_len(&txq->meta[i], len),
2844 PCI_DMA_BIDIRECTIONAL);
2845 txq->meta[i].flags = 0;
2846 }
2847
2848 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd);
2849 }
2850
2851 i = q->n_win;
2852 if (txq->meta[i].flags & CMD_MAPPED) {
2853 pci_unmap_single(il->pci_dev,
2854 dma_unmap_addr(&txq->meta[i], mapping),
2855 dma_unmap_len(&txq->meta[i], len),
2856 PCI_DMA_BIDIRECTIONAL);
2857 txq->meta[i].flags = 0;
2858 }
2859 }
2860 EXPORT_SYMBOL(il_cmd_queue_unmap);
2861
2862 /**
2863 * il_cmd_queue_free - Deallocate DMA queue.
2864 * @txq: Transmit queue to deallocate.
2865 *
2866 * Empty queue by removing and destroying all BD's.
2867 * Free all buffers.
2868 * 0-fill, but do not free "txq" descriptor structure.
2869 */
2870 void
2871 il_cmd_queue_free(struct il_priv *il)
2872 {
2873 struct il_tx_queue *txq = &il->txq[il->cmd_queue];
2874 struct device *dev = &il->pci_dev->dev;
2875 int i;
2876
2877 il_cmd_queue_unmap(il);
2878
2879 /* De-alloc array of command/tx buffers */
2880 if (txq->cmd) {
2881 for (i = 0; i <= TFD_CMD_SLOTS; i++)
2882 kfree(txq->cmd[i]);
2883 }
2884
2885 /* De-alloc circular buffer of TFDs */
2886 if (txq->q.n_bd)
2887 dma_free_coherent(dev, il->hw_params.tfd_size * txq->q.n_bd,
2888 txq->tfds, txq->q.dma_addr);
2889
2890 /* deallocate arrays */
2891 kfree(txq->cmd);
2892 kfree(txq->meta);
2893 txq->cmd = NULL;
2894 txq->meta = NULL;
2895
2896 /* 0-fill queue descriptor structure */
2897 memset(txq, 0, sizeof(*txq));
2898 }
2899 EXPORT_SYMBOL(il_cmd_queue_free);
2900
2901 /*************** DMA-QUEUE-GENERAL-FUNCTIONS *****
2902 * DMA services
2903 *
2904 * Theory of operation
2905 *
2906 * A Tx or Rx queue resides in host DRAM, and is comprised of a circular buffer
2907 * of buffer descriptors, each of which points to one or more data buffers for
2908 * the device to read from or fill. Driver and device exchange status of each
2909 * queue via "read" and "write" pointers. Driver keeps minimum of 2 empty
2910 * entries in each circular buffer, to protect against confusing empty and full
2911 * queue states.
2912 *
2913 * The device reads or writes the data in the queues via the device's several
2914 * DMA/FIFO channels. Each queue is mapped to a single DMA channel.
2915 *
2916 * For Tx queue, there are low mark and high mark limits. If, after queuing
2917 * the packet for Tx, free space become < low mark, Tx queue stopped. When
2918 * reclaiming packets (on 'tx done IRQ), if free space become > high mark,
2919 * Tx queue resumed.
2920 *
2921 * See more detailed info in 4965.h.
2922 ***************************************************/
2923
2924 int
2925 il_queue_space(const struct il_queue *q)
2926 {
2927 int s = q->read_ptr - q->write_ptr;
2928
2929 if (q->read_ptr > q->write_ptr)
2930 s -= q->n_bd;
2931
2932 if (s <= 0)
2933 s += q->n_win;
2934 /* keep some reserve to not confuse empty and full situations */
2935 s -= 2;
2936 if (s < 0)
2937 s = 0;
2938 return s;
2939 }
2940 EXPORT_SYMBOL(il_queue_space);
2941
2942
2943 /**
2944 * il_queue_init - Initialize queue's high/low-water and read/write idxes
2945 */
2946 static int
2947 il_queue_init(struct il_priv *il, struct il_queue *q, int slots, u32 id)
2948 {
2949 /*
2950 * TFD_QUEUE_SIZE_MAX must be power-of-two size, otherwise
2951 * il_queue_inc_wrap and il_queue_dec_wrap are broken.
2952 */
2953 BUILD_BUG_ON(TFD_QUEUE_SIZE_MAX & (TFD_QUEUE_SIZE_MAX - 1));
2954 /* FIXME: remove q->n_bd */
2955 q->n_bd = TFD_QUEUE_SIZE_MAX;
2956
2957 q->n_win = slots;
2958 q->id = id;
2959
2960 /* slots_must be power-of-two size, otherwise
2961 * il_get_cmd_idx is broken. */
2962 BUG_ON(!is_power_of_2(slots));
2963
2964 q->low_mark = q->n_win / 4;
2965 if (q->low_mark < 4)
2966 q->low_mark = 4;
2967
2968 q->high_mark = q->n_win / 8;
2969 if (q->high_mark < 2)
2970 q->high_mark = 2;
2971
2972 q->write_ptr = q->read_ptr = 0;
2973
2974 return 0;
2975 }
2976
2977 /**
2978 * il_tx_queue_alloc - Alloc driver data and TFD CB for one Tx/cmd queue
2979 */
2980 static int
2981 il_tx_queue_alloc(struct il_priv *il, struct il_tx_queue *txq, u32 id)
2982 {
2983 struct device *dev = &il->pci_dev->dev;
2984 size_t tfd_sz = il->hw_params.tfd_size * TFD_QUEUE_SIZE_MAX;
2985
2986 /* Driver ilate data, only for Tx (not command) queues,
2987 * not shared with device. */
2988 if (id != il->cmd_queue) {
2989 txq->skbs = kcalloc(TFD_QUEUE_SIZE_MAX,
2990 sizeof(struct sk_buff *),
2991 GFP_KERNEL);
2992 if (!txq->skbs) {
2993 IL_ERR("Fail to alloc skbs\n");
2994 goto error;
2995 }
2996 } else
2997 txq->skbs = NULL;
2998
2999 /* Circular buffer of transmit frame descriptors (TFDs),
3000 * shared with device */
3001 txq->tfds =
3002 dma_alloc_coherent(dev, tfd_sz, &txq->q.dma_addr, GFP_KERNEL);
3003 if (!txq->tfds)
3004 goto error;
3005
3006 txq->q.id = id;
3007
3008 return 0;
3009
3010 error:
3011 kfree(txq->skbs);
3012 txq->skbs = NULL;
3013
3014 return -ENOMEM;
3015 }
3016
3017 /**
3018 * il_tx_queue_init - Allocate and initialize one tx/cmd queue
3019 */
3020 int
3021 il_tx_queue_init(struct il_priv *il, u32 txq_id)
3022 {
3023 int i, len, ret;
3024 int slots, actual_slots;
3025 struct il_tx_queue *txq = &il->txq[txq_id];
3026
3027 /*
3028 * Alloc buffer array for commands (Tx or other types of commands).
3029 * For the command queue (#4/#9), allocate command space + one big
3030 * command for scan, since scan command is very huge; the system will
3031 * not have two scans at the same time, so only one is needed.
3032 * For normal Tx queues (all other queues), no super-size command
3033 * space is needed.
3034 */
3035 if (txq_id == il->cmd_queue) {
3036 slots = TFD_CMD_SLOTS;
3037 actual_slots = slots + 1;
3038 } else {
3039 slots = TFD_TX_CMD_SLOTS;
3040 actual_slots = slots;
3041 }
3042
3043 txq->meta =
3044 kzalloc(sizeof(struct il_cmd_meta) * actual_slots, GFP_KERNEL);
3045 txq->cmd =
3046 kzalloc(sizeof(struct il_device_cmd *) * actual_slots, GFP_KERNEL);
3047
3048 if (!txq->meta || !txq->cmd)
3049 goto out_free_arrays;
3050
3051 len = sizeof(struct il_device_cmd);
3052 for (i = 0; i < actual_slots; i++) {
3053 /* only happens for cmd queue */
3054 if (i == slots)
3055 len = IL_MAX_CMD_SIZE;
3056
3057 txq->cmd[i] = kmalloc(len, GFP_KERNEL);
3058 if (!txq->cmd[i])
3059 goto err;
3060 }
3061
3062 /* Alloc driver data array and TFD circular buffer */
3063 ret = il_tx_queue_alloc(il, txq, txq_id);
3064 if (ret)
3065 goto err;
3066
3067 txq->need_update = 0;
3068
3069 /*
3070 * For the default queues 0-3, set up the swq_id
3071 * already -- all others need to get one later
3072 * (if they need one at all).
3073 */
3074 if (txq_id < 4)
3075 il_set_swq_id(txq, txq_id, txq_id);
3076
3077 /* Initialize queue's high/low-water marks, and head/tail idxes */
3078 il_queue_init(il, &txq->q, slots, txq_id);
3079
3080 /* Tell device where to find queue */
3081 il->ops->txq_init(il, txq);
3082
3083 return 0;
3084 err:
3085 for (i = 0; i < actual_slots; i++)
3086 kfree(txq->cmd[i]);
3087 out_free_arrays:
3088 kfree(txq->meta);
3089 txq->meta = NULL;
3090 kfree(txq->cmd);
3091 txq->cmd = NULL;
3092
3093 return -ENOMEM;
3094 }
3095 EXPORT_SYMBOL(il_tx_queue_init);
3096
3097 void
3098 il_tx_queue_reset(struct il_priv *il, u32 txq_id)
3099 {
3100 int slots, actual_slots;
3101 struct il_tx_queue *txq = &il->txq[txq_id];
3102
3103 if (txq_id == il->cmd_queue) {
3104 slots = TFD_CMD_SLOTS;
3105 actual_slots = TFD_CMD_SLOTS + 1;
3106 } else {
3107 slots = TFD_TX_CMD_SLOTS;
3108 actual_slots = TFD_TX_CMD_SLOTS;
3109 }
3110
3111 memset(txq->meta, 0, sizeof(struct il_cmd_meta) * actual_slots);
3112 txq->need_update = 0;
3113
3114 /* Initialize queue's high/low-water marks, and head/tail idxes */
3115 il_queue_init(il, &txq->q, slots, txq_id);
3116
3117 /* Tell device where to find queue */
3118 il->ops->txq_init(il, txq);
3119 }
3120 EXPORT_SYMBOL(il_tx_queue_reset);
3121
3122 /*************** HOST COMMAND QUEUE FUNCTIONS *****/
3123
3124 /**
3125 * il_enqueue_hcmd - enqueue a uCode command
3126 * @il: device ilate data point
3127 * @cmd: a point to the ucode command structure
3128 *
3129 * The function returns < 0 values to indicate the operation is
3130 * failed. On success, it turns the idx (> 0) of command in the
3131 * command queue.
3132 */
3133 int
3134 il_enqueue_hcmd(struct il_priv *il, struct il_host_cmd *cmd)
3135 {
3136 struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3137 struct il_queue *q = &txq->q;
3138 struct il_device_cmd *out_cmd;
3139 struct il_cmd_meta *out_meta;
3140 dma_addr_t phys_addr;
3141 unsigned long flags;
3142 int len;
3143 u32 idx;
3144 u16 fix_size;
3145
3146 cmd->len = il->ops->get_hcmd_size(cmd->id, cmd->len);
3147 fix_size = (u16) (cmd->len + sizeof(out_cmd->hdr));
3148
3149 /* If any of the command structures end up being larger than
3150 * the TFD_MAX_PAYLOAD_SIZE, and it sent as a 'small' command then
3151 * we will need to increase the size of the TFD entries
3152 * Also, check to see if command buffer should not exceed the size
3153 * of device_cmd and max_cmd_size. */
3154 BUG_ON((fix_size > TFD_MAX_PAYLOAD_SIZE) &&
3155 !(cmd->flags & CMD_SIZE_HUGE));
3156 BUG_ON(fix_size > IL_MAX_CMD_SIZE);
3157
3158 if (il_is_rfkill(il) || il_is_ctkill(il)) {
3159 IL_WARN("Not sending command - %s KILL\n",
3160 il_is_rfkill(il) ? "RF" : "CT");
3161 return -EIO;
3162 }
3163
3164 spin_lock_irqsave(&il->hcmd_lock, flags);
3165
3166 if (il_queue_space(q) < ((cmd->flags & CMD_ASYNC) ? 2 : 1)) {
3167 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3168
3169 IL_ERR("Restarting adapter due to command queue full\n");
3170 queue_work(il->workqueue, &il->restart);
3171 return -ENOSPC;
3172 }
3173
3174 idx = il_get_cmd_idx(q, q->write_ptr, cmd->flags & CMD_SIZE_HUGE);
3175 out_cmd = txq->cmd[idx];
3176 out_meta = &txq->meta[idx];
3177
3178 if (WARN_ON(out_meta->flags & CMD_MAPPED)) {
3179 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3180 return -ENOSPC;
3181 }
3182
3183 memset(out_meta, 0, sizeof(*out_meta)); /* re-initialize to NULL */
3184 out_meta->flags = cmd->flags | CMD_MAPPED;
3185 if (cmd->flags & CMD_WANT_SKB)
3186 out_meta->source = cmd;
3187 if (cmd->flags & CMD_ASYNC)
3188 out_meta->callback = cmd->callback;
3189
3190 out_cmd->hdr.cmd = cmd->id;
3191 memcpy(&out_cmd->cmd.payload, cmd->data, cmd->len);
3192
3193 /* At this point, the out_cmd now has all of the incoming cmd
3194 * information */
3195
3196 out_cmd->hdr.flags = 0;
3197 out_cmd->hdr.sequence =
3198 cpu_to_le16(QUEUE_TO_SEQ(il->cmd_queue) | IDX_TO_SEQ(q->write_ptr));
3199 if (cmd->flags & CMD_SIZE_HUGE)
3200 out_cmd->hdr.sequence |= SEQ_HUGE_FRAME;
3201 len = sizeof(struct il_device_cmd);
3202 if (idx == TFD_CMD_SLOTS)
3203 len = IL_MAX_CMD_SIZE;
3204
3205 #ifdef CONFIG_IWLEGACY_DEBUG
3206 switch (out_cmd->hdr.cmd) {
3207 case C_TX_LINK_QUALITY_CMD:
3208 case C_SENSITIVITY:
3209 D_HC_DUMP("Sending command %s (#%x), seq: 0x%04X, "
3210 "%d bytes at %d[%d]:%d\n",
3211 il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3212 le16_to_cpu(out_cmd->hdr.sequence), fix_size,
3213 q->write_ptr, idx, il->cmd_queue);
3214 break;
3215 default:
3216 D_HC("Sending command %s (#%x), seq: 0x%04X, "
3217 "%d bytes at %d[%d]:%d\n",
3218 il_get_cmd_string(out_cmd->hdr.cmd), out_cmd->hdr.cmd,
3219 le16_to_cpu(out_cmd->hdr.sequence), fix_size, q->write_ptr,
3220 idx, il->cmd_queue);
3221 }
3222 #endif
3223
3224 phys_addr =
3225 pci_map_single(il->pci_dev, &out_cmd->hdr, fix_size,
3226 PCI_DMA_BIDIRECTIONAL);
3227 if (unlikely(pci_dma_mapping_error(il->pci_dev, phys_addr))) {
3228 idx = -ENOMEM;
3229 goto out;
3230 }
3231 dma_unmap_addr_set(out_meta, mapping, phys_addr);
3232 dma_unmap_len_set(out_meta, len, fix_size);
3233
3234 txq->need_update = 1;
3235
3236 if (il->ops->txq_update_byte_cnt_tbl)
3237 /* Set up entry in queue's byte count circular buffer */
3238 il->ops->txq_update_byte_cnt_tbl(il, txq, 0);
3239
3240 il->ops->txq_attach_buf_to_tfd(il, txq, phys_addr, fix_size, 1,
3241 U32_PAD(cmd->len));
3242
3243 /* Increment and update queue's write idx */
3244 q->write_ptr = il_queue_inc_wrap(q->write_ptr, q->n_bd);
3245 il_txq_update_write_ptr(il, txq);
3246
3247 out:
3248 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3249 return idx;
3250 }
3251
3252 /**
3253 * il_hcmd_queue_reclaim - Reclaim TX command queue entries already Tx'd
3254 *
3255 * When FW advances 'R' idx, all entries between old and new 'R' idx
3256 * need to be reclaimed. As result, some free space forms. If there is
3257 * enough free space (> low mark), wake the stack that feeds us.
3258 */
3259 static void
3260 il_hcmd_queue_reclaim(struct il_priv *il, int txq_id, int idx, int cmd_idx)
3261 {
3262 struct il_tx_queue *txq = &il->txq[txq_id];
3263 struct il_queue *q = &txq->q;
3264 int nfreed = 0;
3265
3266 if (idx >= q->n_bd || il_queue_used(q, idx) == 0) {
3267 IL_ERR("Read idx for DMA queue txq id (%d), idx %d, "
3268 "is out of range [0-%d] %d %d.\n", txq_id, idx, q->n_bd,
3269 q->write_ptr, q->read_ptr);
3270 return;
3271 }
3272
3273 for (idx = il_queue_inc_wrap(idx, q->n_bd); q->read_ptr != idx;
3274 q->read_ptr = il_queue_inc_wrap(q->read_ptr, q->n_bd)) {
3275
3276 if (nfreed++ > 0) {
3277 IL_ERR("HCMD skipped: idx (%d) %d %d\n", idx,
3278 q->write_ptr, q->read_ptr);
3279 queue_work(il->workqueue, &il->restart);
3280 }
3281
3282 }
3283 }
3284
3285 /**
3286 * il_tx_cmd_complete - Pull unused buffers off the queue and reclaim them
3287 * @rxb: Rx buffer to reclaim
3288 *
3289 * If an Rx buffer has an async callback associated with it the callback
3290 * will be executed. The attached skb (if present) will only be freed
3291 * if the callback returns 1
3292 */
3293 void
3294 il_tx_cmd_complete(struct il_priv *il, struct il_rx_buf *rxb)
3295 {
3296 struct il_rx_pkt *pkt = rxb_addr(rxb);
3297 u16 sequence = le16_to_cpu(pkt->hdr.sequence);
3298 int txq_id = SEQ_TO_QUEUE(sequence);
3299 int idx = SEQ_TO_IDX(sequence);
3300 int cmd_idx;
3301 bool huge = !!(pkt->hdr.sequence & SEQ_HUGE_FRAME);
3302 struct il_device_cmd *cmd;
3303 struct il_cmd_meta *meta;
3304 struct il_tx_queue *txq = &il->txq[il->cmd_queue];
3305 unsigned long flags;
3306
3307 /* If a Tx command is being handled and it isn't in the actual
3308 * command queue then there a command routing bug has been introduced
3309 * in the queue management code. */
3310 if (WARN
3311 (txq_id != il->cmd_queue,
3312 "wrong command queue %d (should be %d), sequence 0x%X readp=%d writep=%d\n",
3313 txq_id, il->cmd_queue, sequence, il->txq[il->cmd_queue].q.read_ptr,
3314 il->txq[il->cmd_queue].q.write_ptr)) {
3315 il_print_hex_error(il, pkt, 32);
3316 return;
3317 }
3318
3319 cmd_idx = il_get_cmd_idx(&txq->q, idx, huge);
3320 cmd = txq->cmd[cmd_idx];
3321 meta = &txq->meta[cmd_idx];
3322
3323 txq->time_stamp = jiffies;
3324
3325 pci_unmap_single(il->pci_dev, dma_unmap_addr(meta, mapping),
3326 dma_unmap_len(meta, len), PCI_DMA_BIDIRECTIONAL);
3327
3328 /* Input error checking is done when commands are added to queue. */
3329 if (meta->flags & CMD_WANT_SKB) {
3330 meta->source->reply_page = (unsigned long)rxb_addr(rxb);
3331 rxb->page = NULL;
3332 } else if (meta->callback)
3333 meta->callback(il, cmd, pkt);
3334
3335 spin_lock_irqsave(&il->hcmd_lock, flags);
3336
3337 il_hcmd_queue_reclaim(il, txq_id, idx, cmd_idx);
3338
3339 if (!(meta->flags & CMD_ASYNC)) {
3340 clear_bit(S_HCMD_ACTIVE, &il->status);
3341 D_INFO("Clearing HCMD_ACTIVE for command %s\n",
3342 il_get_cmd_string(cmd->hdr.cmd));
3343 wake_up(&il->wait_command_queue);
3344 }
3345
3346 /* Mark as unmapped */
3347 meta->flags = 0;
3348
3349 spin_unlock_irqrestore(&il->hcmd_lock, flags);
3350 }
3351 EXPORT_SYMBOL(il_tx_cmd_complete);
3352
3353 MODULE_DESCRIPTION("iwl-legacy: common functions for 3945 and 4965");
3354 MODULE_VERSION(IWLWIFI_VERSION);
3355 MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
3356 MODULE_LICENSE("GPL");
3357
3358 /*
3359 * set bt_coex_active to true, uCode will do kill/defer
3360 * every time the priority line is asserted (BT is sending signals on the
3361 * priority line in the PCIx).
3362 * set bt_coex_active to false, uCode will ignore the BT activity and
3363 * perform the normal operation
3364 *
3365 * User might experience transmit issue on some platform due to WiFi/BT
3366 * co-exist problem. The possible behaviors are:
3367 * Able to scan and finding all the available AP
3368 * Not able to associate with any AP
3369 * On those platforms, WiFi communication can be restored by set
3370 * "bt_coex_active" module parameter to "false"
3371 *
3372 * default: bt_coex_active = true (BT_COEX_ENABLE)
3373 */
3374 static bool bt_coex_active = true;
3375 module_param(bt_coex_active, bool, S_IRUGO);
3376 MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist");
3377
3378 u32 il_debug_level;
3379 EXPORT_SYMBOL(il_debug_level);
3380
3381 const u8 il_bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
3382 EXPORT_SYMBOL(il_bcast_addr);
3383
3384 #define MAX_BIT_RATE_40_MHZ 150 /* Mbps */
3385 #define MAX_BIT_RATE_20_MHZ 72 /* Mbps */
3386 static void
3387 il_init_ht_hw_capab(const struct il_priv *il,
3388 struct ieee80211_sta_ht_cap *ht_info,
3389 enum nl80211_band band)
3390 {
3391 u16 max_bit_rate = 0;
3392 u8 rx_chains_num = il->hw_params.rx_chains_num;
3393 u8 tx_chains_num = il->hw_params.tx_chains_num;
3394
3395 ht_info->cap = 0;
3396 memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
3397
3398 ht_info->ht_supported = true;
3399
3400 ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
3401 max_bit_rate = MAX_BIT_RATE_20_MHZ;
3402 if (il->hw_params.ht40_channel & BIT(band)) {
3403 ht_info->cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40;
3404 ht_info->cap |= IEEE80211_HT_CAP_SGI_40;
3405 ht_info->mcs.rx_mask[4] = 0x01;
3406 max_bit_rate = MAX_BIT_RATE_40_MHZ;
3407 }
3408
3409 if (il->cfg->mod_params->amsdu_size_8K)
3410 ht_info->cap |= IEEE80211_HT_CAP_MAX_AMSDU;
3411
3412 ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
3413 ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
3414
3415 ht_info->mcs.rx_mask[0] = 0xFF;
3416 if (rx_chains_num >= 2)
3417 ht_info->mcs.rx_mask[1] = 0xFF;
3418 if (rx_chains_num >= 3)
3419 ht_info->mcs.rx_mask[2] = 0xFF;
3420
3421 /* Highest supported Rx data rate */
3422 max_bit_rate *= rx_chains_num;
3423 WARN_ON(max_bit_rate & ~IEEE80211_HT_MCS_RX_HIGHEST_MASK);
3424 ht_info->mcs.rx_highest = cpu_to_le16(max_bit_rate);
3425
3426 /* Tx MCS capabilities */
3427 ht_info->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
3428 if (tx_chains_num != rx_chains_num) {
3429 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
3430 ht_info->mcs.tx_params |=
3431 ((tx_chains_num -
3432 1) << IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
3433 }
3434 }
3435
3436 /**
3437 * il_init_geos - Initialize mac80211's geo/channel info based from eeprom
3438 */
3439 int
3440 il_init_geos(struct il_priv *il)
3441 {
3442 struct il_channel_info *ch;
3443 struct ieee80211_supported_band *sband;
3444 struct ieee80211_channel *channels;
3445 struct ieee80211_channel *geo_ch;
3446 struct ieee80211_rate *rates;
3447 int i = 0;
3448 s8 max_tx_power = 0;
3449
3450 if (il->bands[NL80211_BAND_2GHZ].n_bitrates ||
3451 il->bands[NL80211_BAND_5GHZ].n_bitrates) {
3452 D_INFO("Geography modes already initialized.\n");
3453 set_bit(S_GEO_CONFIGURED, &il->status);
3454 return 0;
3455 }
3456
3457 channels =
3458 kzalloc(sizeof(struct ieee80211_channel) * il->channel_count,
3459 GFP_KERNEL);
3460 if (!channels)
3461 return -ENOMEM;
3462
3463 rates =
3464 kzalloc((sizeof(struct ieee80211_rate) * RATE_COUNT_LEGACY),
3465 GFP_KERNEL);
3466 if (!rates) {
3467 kfree(channels);
3468 return -ENOMEM;
3469 }
3470
3471 /* 5.2GHz channels start after the 2.4GHz channels */
3472 sband = &il->bands[NL80211_BAND_5GHZ];
3473 sband->channels = &channels[ARRAY_SIZE(il_eeprom_band_1)];
3474 /* just OFDM */
3475 sband->bitrates = &rates[IL_FIRST_OFDM_RATE];
3476 sband->n_bitrates = RATE_COUNT_LEGACY - IL_FIRST_OFDM_RATE;
3477
3478 if (il->cfg->sku & IL_SKU_N)
3479 il_init_ht_hw_capab(il, &sband->ht_cap, NL80211_BAND_5GHZ);
3480
3481 sband = &il->bands[NL80211_BAND_2GHZ];
3482 sband->channels = channels;
3483 /* OFDM & CCK */
3484 sband->bitrates = rates;
3485 sband->n_bitrates = RATE_COUNT_LEGACY;
3486
3487 if (il->cfg->sku & IL_SKU_N)
3488 il_init_ht_hw_capab(il, &sband->ht_cap, NL80211_BAND_2GHZ);
3489
3490 il->ieee_channels = channels;
3491 il->ieee_rates = rates;
3492
3493 for (i = 0; i < il->channel_count; i++) {
3494 ch = &il->channel_info[i];
3495
3496 if (!il_is_channel_valid(ch))
3497 continue;
3498
3499 sband = &il->bands[ch->band];
3500
3501 geo_ch = &sband->channels[sband->n_channels++];
3502
3503 geo_ch->center_freq =
3504 ieee80211_channel_to_frequency(ch->channel, ch->band);
3505 geo_ch->max_power = ch->max_power_avg;
3506 geo_ch->max_antenna_gain = 0xff;
3507 geo_ch->hw_value = ch->channel;
3508
3509 if (il_is_channel_valid(ch)) {
3510 if (!(ch->flags & EEPROM_CHANNEL_IBSS))
3511 geo_ch->flags |= IEEE80211_CHAN_NO_IR;
3512
3513 if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
3514 geo_ch->flags |= IEEE80211_CHAN_NO_IR;
3515
3516 if (ch->flags & EEPROM_CHANNEL_RADAR)
3517 geo_ch->flags |= IEEE80211_CHAN_RADAR;
3518
3519 geo_ch->flags |= ch->ht40_extension_channel;
3520
3521 if (ch->max_power_avg > max_tx_power)
3522 max_tx_power = ch->max_power_avg;
3523 } else {
3524 geo_ch->flags |= IEEE80211_CHAN_DISABLED;
3525 }
3526
3527 D_INFO("Channel %d Freq=%d[%sGHz] %s flag=0x%X\n", ch->channel,
3528 geo_ch->center_freq,
3529 il_is_channel_a_band(ch) ? "5.2" : "2.4",
3530 geo_ch->
3531 flags & IEEE80211_CHAN_DISABLED ? "restricted" : "valid",
3532 geo_ch->flags);
3533 }
3534
3535 il->tx_power_device_lmt = max_tx_power;
3536 il->tx_power_user_lmt = max_tx_power;
3537 il->tx_power_next = max_tx_power;
3538
3539 if (il->bands[NL80211_BAND_5GHZ].n_channels == 0 &&
3540 (il->cfg->sku & IL_SKU_A)) {
3541 IL_INFO("Incorrectly detected BG card as ABG. "
3542 "Please send your PCI ID 0x%04X:0x%04X to maintainer.\n",
3543 il->pci_dev->device, il->pci_dev->subsystem_device);
3544 il->cfg->sku &= ~IL_SKU_A;
3545 }
3546
3547 IL_INFO("Tunable channels: %d 802.11bg, %d 802.11a channels\n",
3548 il->bands[NL80211_BAND_2GHZ].n_channels,
3549 il->bands[NL80211_BAND_5GHZ].n_channels);
3550
3551 set_bit(S_GEO_CONFIGURED, &il->status);
3552
3553 return 0;
3554 }
3555 EXPORT_SYMBOL(il_init_geos);
3556
3557 /*
3558 * il_free_geos - undo allocations in il_init_geos
3559 */
3560 void
3561 il_free_geos(struct il_priv *il)
3562 {
3563 kfree(il->ieee_channels);
3564 kfree(il->ieee_rates);
3565 clear_bit(S_GEO_CONFIGURED, &il->status);
3566 }
3567 EXPORT_SYMBOL(il_free_geos);
3568
3569 static bool
3570 il_is_channel_extension(struct il_priv *il, enum nl80211_band band,
3571 u16 channel, u8 extension_chan_offset)
3572 {
3573 const struct il_channel_info *ch_info;
3574
3575 ch_info = il_get_channel_info(il, band, channel);
3576 if (!il_is_channel_valid(ch_info))
3577 return false;
3578
3579 if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
3580 return !(ch_info->
3581 ht40_extension_channel & IEEE80211_CHAN_NO_HT40PLUS);
3582 else if (extension_chan_offset == IEEE80211_HT_PARAM_CHA_SEC_BELOW)
3583 return !(ch_info->
3584 ht40_extension_channel & IEEE80211_CHAN_NO_HT40MINUS);
3585
3586 return false;
3587 }
3588
3589 bool
3590 il_is_ht40_tx_allowed(struct il_priv *il, struct ieee80211_sta_ht_cap *ht_cap)
3591 {
3592 if (!il->ht.enabled || !il->ht.is_40mhz)
3593 return false;
3594
3595 /*
3596 * We do not check for IEEE80211_HT_CAP_SUP_WIDTH_20_40
3597 * the bit will not set if it is pure 40MHz case
3598 */
3599 if (ht_cap && !ht_cap->ht_supported)
3600 return false;
3601
3602 #ifdef CONFIG_IWLEGACY_DEBUGFS
3603 if (il->disable_ht40)
3604 return false;
3605 #endif
3606
3607 return il_is_channel_extension(il, il->band,
3608 le16_to_cpu(il->staging.channel),
3609 il->ht.extension_chan_offset);
3610 }
3611 EXPORT_SYMBOL(il_is_ht40_tx_allowed);
3612
3613 static u16 noinline
3614 il_adjust_beacon_interval(u16 beacon_val, u16 max_beacon_val)
3615 {
3616 u16 new_val;
3617 u16 beacon_factor;
3618
3619 /*
3620 * If mac80211 hasn't given us a beacon interval, program
3621 * the default into the device.
3622 */
3623 if (!beacon_val)
3624 return DEFAULT_BEACON_INTERVAL;
3625
3626 /*
3627 * If the beacon interval we obtained from the peer
3628 * is too large, we'll have to wake up more often
3629 * (and in IBSS case, we'll beacon too much)
3630 *
3631 * For example, if max_beacon_val is 4096, and the
3632 * requested beacon interval is 7000, we'll have to
3633 * use 3500 to be able to wake up on the beacons.
3634 *
3635 * This could badly influence beacon detection stats.
3636 */
3637
3638 beacon_factor = (beacon_val + max_beacon_val) / max_beacon_val;
3639 new_val = beacon_val / beacon_factor;
3640
3641 if (!new_val)
3642 new_val = max_beacon_val;
3643
3644 return new_val;
3645 }
3646
3647 int
3648 il_send_rxon_timing(struct il_priv *il)
3649 {
3650 u64 tsf;
3651 s32 interval_tm, rem;
3652 struct ieee80211_conf *conf = NULL;
3653 u16 beacon_int;
3654 struct ieee80211_vif *vif = il->vif;
3655
3656 conf = &il->hw->conf;
3657
3658 lockdep_assert_held(&il->mutex);
3659
3660 memset(&il->timing, 0, sizeof(struct il_rxon_time_cmd));
3661
3662 il->timing.timestamp = cpu_to_le64(il->timestamp);
3663 il->timing.listen_interval = cpu_to_le16(conf->listen_interval);
3664
3665 beacon_int = vif ? vif->bss_conf.beacon_int : 0;
3666
3667 /*
3668 * TODO: For IBSS we need to get atim_win from mac80211,
3669 * for now just always use 0
3670 */
3671 il->timing.atim_win = 0;
3672
3673 beacon_int =
3674 il_adjust_beacon_interval(beacon_int,
3675 il->hw_params.max_beacon_itrvl *
3676 TIME_UNIT);
3677 il->timing.beacon_interval = cpu_to_le16(beacon_int);
3678
3679 tsf = il->timestamp; /* tsf is modifed by do_div: copy it */
3680 interval_tm = beacon_int * TIME_UNIT;
3681 rem = do_div(tsf, interval_tm);
3682 il->timing.beacon_init_val = cpu_to_le32(interval_tm - rem);
3683
3684 il->timing.dtim_period = vif ? (vif->bss_conf.dtim_period ? : 1) : 1;
3685
3686 D_ASSOC("beacon interval %d beacon timer %d beacon tim %d\n",
3687 le16_to_cpu(il->timing.beacon_interval),
3688 le32_to_cpu(il->timing.beacon_init_val),
3689 le16_to_cpu(il->timing.atim_win));
3690
3691 return il_send_cmd_pdu(il, C_RXON_TIMING, sizeof(il->timing),
3692 &il->timing);
3693 }
3694 EXPORT_SYMBOL(il_send_rxon_timing);
3695
3696 void
3697 il_set_rxon_hwcrypto(struct il_priv *il, int hw_decrypt)
3698 {
3699 struct il_rxon_cmd *rxon = &il->staging;
3700
3701 if (hw_decrypt)
3702 rxon->filter_flags &= ~RXON_FILTER_DIS_DECRYPT_MSK;
3703 else
3704 rxon->filter_flags |= RXON_FILTER_DIS_DECRYPT_MSK;
3705
3706 }
3707 EXPORT_SYMBOL(il_set_rxon_hwcrypto);
3708
3709 /* validate RXON structure is valid */
3710 int
3711 il_check_rxon_cmd(struct il_priv *il)
3712 {
3713 struct il_rxon_cmd *rxon = &il->staging;
3714 bool error = false;
3715
3716 if (rxon->flags & RXON_FLG_BAND_24G_MSK) {
3717 if (rxon->flags & RXON_FLG_TGJ_NARROW_BAND_MSK) {
3718 IL_WARN("check 2.4G: wrong narrow\n");
3719 error = true;
3720 }
3721 if (rxon->flags & RXON_FLG_RADAR_DETECT_MSK) {
3722 IL_WARN("check 2.4G: wrong radar\n");
3723 error = true;
3724 }
3725 } else {
3726 if (!(rxon->flags & RXON_FLG_SHORT_SLOT_MSK)) {
3727 IL_WARN("check 5.2G: not short slot!\n");
3728 error = true;
3729 }
3730 if (rxon->flags & RXON_FLG_CCK_MSK) {
3731 IL_WARN("check 5.2G: CCK!\n");
3732 error = true;
3733 }
3734 }
3735 if ((rxon->node_addr[0] | rxon->bssid_addr[0]) & 0x1) {
3736 IL_WARN("mac/bssid mcast!\n");
3737 error = true;
3738 }
3739
3740 /* make sure basic rates 6Mbps and 1Mbps are supported */
3741 if ((rxon->ofdm_basic_rates & RATE_6M_MASK) == 0 &&
3742 (rxon->cck_basic_rates & RATE_1M_MASK) == 0) {
3743 IL_WARN("neither 1 nor 6 are basic\n");
3744 error = true;
3745 }
3746
3747 if (le16_to_cpu(rxon->assoc_id) > 2007) {
3748 IL_WARN("aid > 2007\n");
3749 error = true;
3750 }
3751
3752 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) ==
3753 (RXON_FLG_CCK_MSK | RXON_FLG_SHORT_SLOT_MSK)) {
3754 IL_WARN("CCK and short slot\n");
3755 error = true;
3756 }
3757
3758 if ((rxon->flags & (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) ==
3759 (RXON_FLG_CCK_MSK | RXON_FLG_AUTO_DETECT_MSK)) {
3760 IL_WARN("CCK and auto detect");
3761 error = true;
3762 }
3763
3764 if ((rxon->
3765 flags & (RXON_FLG_AUTO_DETECT_MSK | RXON_FLG_TGG_PROTECT_MSK)) ==
3766 RXON_FLG_TGG_PROTECT_MSK) {
3767 IL_WARN("TGg but no auto-detect\n");
3768 error = true;
3769 }
3770
3771 if (error)
3772 IL_WARN("Tuning to channel %d\n", le16_to_cpu(rxon->channel));
3773
3774 if (error) {
3775 IL_ERR("Invalid RXON\n");
3776 return -EINVAL;
3777 }
3778 return 0;
3779 }
3780 EXPORT_SYMBOL(il_check_rxon_cmd);
3781
3782 /**
3783 * il_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
3784 * @il: staging_rxon is compared to active_rxon
3785 *
3786 * If the RXON structure is changing enough to require a new tune,
3787 * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
3788 * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
3789 */
3790 int
3791 il_full_rxon_required(struct il_priv *il)
3792 {
3793 const struct il_rxon_cmd *staging = &il->staging;
3794 const struct il_rxon_cmd *active = &il->active;
3795
3796 #define CHK(cond) \
3797 if ((cond)) { \
3798 D_INFO("need full RXON - " #cond "\n"); \
3799 return 1; \
3800 }
3801
3802 #define CHK_NEQ(c1, c2) \
3803 if ((c1) != (c2)) { \
3804 D_INFO("need full RXON - " \
3805 #c1 " != " #c2 " - %d != %d\n", \
3806 (c1), (c2)); \
3807 return 1; \
3808 }
3809
3810 /* These items are only settable from the full RXON command */
3811 CHK(!il_is_associated(il));
3812 CHK(!ether_addr_equal_64bits(staging->bssid_addr, active->bssid_addr));
3813 CHK(!ether_addr_equal_64bits(staging->node_addr, active->node_addr));
3814 CHK(!ether_addr_equal_64bits(staging->wlap_bssid_addr,
3815 active->wlap_bssid_addr));
3816 CHK_NEQ(staging->dev_type, active->dev_type);
3817 CHK_NEQ(staging->channel, active->channel);
3818 CHK_NEQ(staging->air_propagation, active->air_propagation);
3819 CHK_NEQ(staging->ofdm_ht_single_stream_basic_rates,
3820 active->ofdm_ht_single_stream_basic_rates);
3821 CHK_NEQ(staging->ofdm_ht_dual_stream_basic_rates,
3822 active->ofdm_ht_dual_stream_basic_rates);
3823 CHK_NEQ(staging->assoc_id, active->assoc_id);
3824
3825 /* flags, filter_flags, ofdm_basic_rates, and cck_basic_rates can
3826 * be updated with the RXON_ASSOC command -- however only some
3827 * flag transitions are allowed using RXON_ASSOC */
3828
3829 /* Check if we are not switching bands */
3830 CHK_NEQ(staging->flags & RXON_FLG_BAND_24G_MSK,
3831 active->flags & RXON_FLG_BAND_24G_MSK);
3832
3833 /* Check if we are switching association toggle */
3834 CHK_NEQ(staging->filter_flags & RXON_FILTER_ASSOC_MSK,
3835 active->filter_flags & RXON_FILTER_ASSOC_MSK);
3836
3837 #undef CHK
3838 #undef CHK_NEQ
3839
3840 return 0;
3841 }
3842 EXPORT_SYMBOL(il_full_rxon_required);
3843
3844 u8
3845 il_get_lowest_plcp(struct il_priv *il)
3846 {
3847 /*
3848 * Assign the lowest rate -- should really get this from
3849 * the beacon skb from mac80211.
3850 */
3851 if (il->staging.flags & RXON_FLG_BAND_24G_MSK)
3852 return RATE_1M_PLCP;
3853 else
3854 return RATE_6M_PLCP;
3855 }
3856 EXPORT_SYMBOL(il_get_lowest_plcp);
3857
3858 static void
3859 _il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3860 {
3861 struct il_rxon_cmd *rxon = &il->staging;
3862
3863 if (!il->ht.enabled) {
3864 rxon->flags &=
3865 ~(RXON_FLG_CHANNEL_MODE_MSK |
3866 RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK | RXON_FLG_HT40_PROT_MSK
3867 | RXON_FLG_HT_PROT_MSK);
3868 return;
3869 }
3870
3871 rxon->flags |=
3872 cpu_to_le32(il->ht.protection << RXON_FLG_HT_OPERATING_MODE_POS);
3873
3874 /* Set up channel bandwidth:
3875 * 20 MHz only, 20/40 mixed or pure 40 if ht40 ok */
3876 /* clear the HT channel mode before set the mode */
3877 rxon->flags &=
3878 ~(RXON_FLG_CHANNEL_MODE_MSK | RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3879 if (il_is_ht40_tx_allowed(il, NULL)) {
3880 /* pure ht40 */
3881 if (il->ht.protection == IEEE80211_HT_OP_MODE_PROTECTION_20MHZ) {
3882 rxon->flags |= RXON_FLG_CHANNEL_MODE_PURE_40;
3883 /* Note: control channel is opposite of extension channel */
3884 switch (il->ht.extension_chan_offset) {
3885 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3886 rxon->flags &=
3887 ~RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3888 break;
3889 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3890 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3891 break;
3892 }
3893 } else {
3894 /* Note: control channel is opposite of extension channel */
3895 switch (il->ht.extension_chan_offset) {
3896 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3897 rxon->flags &=
3898 ~(RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK);
3899 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3900 break;
3901 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3902 rxon->flags |= RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK;
3903 rxon->flags |= RXON_FLG_CHANNEL_MODE_MIXED;
3904 break;
3905 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3906 default:
3907 /* channel location only valid if in Mixed mode */
3908 IL_ERR("invalid extension channel offset\n");
3909 break;
3910 }
3911 }
3912 } else {
3913 rxon->flags |= RXON_FLG_CHANNEL_MODE_LEGACY;
3914 }
3915
3916 if (il->ops->set_rxon_chain)
3917 il->ops->set_rxon_chain(il);
3918
3919 D_ASSOC("rxon flags 0x%X operation mode :0x%X "
3920 "extension channel offset 0x%x\n", le32_to_cpu(rxon->flags),
3921 il->ht.protection, il->ht.extension_chan_offset);
3922 }
3923
3924 void
3925 il_set_rxon_ht(struct il_priv *il, struct il_ht_config *ht_conf)
3926 {
3927 _il_set_rxon_ht(il, ht_conf);
3928 }
3929 EXPORT_SYMBOL(il_set_rxon_ht);
3930
3931 /* Return valid, unused, channel for a passive scan to reset the RF */
3932 u8
3933 il_get_single_channel_number(struct il_priv *il, enum nl80211_band band)
3934 {
3935 const struct il_channel_info *ch_info;
3936 int i;
3937 u8 channel = 0;
3938 u8 min, max;
3939
3940 if (band == NL80211_BAND_5GHZ) {
3941 min = 14;
3942 max = il->channel_count;
3943 } else {
3944 min = 0;
3945 max = 14;
3946 }
3947
3948 for (i = min; i < max; i++) {
3949 channel = il->channel_info[i].channel;
3950 if (channel == le16_to_cpu(il->staging.channel))
3951 continue;
3952
3953 ch_info = il_get_channel_info(il, band, channel);
3954 if (il_is_channel_valid(ch_info))
3955 break;
3956 }
3957
3958 return channel;
3959 }
3960 EXPORT_SYMBOL(il_get_single_channel_number);
3961
3962 /**
3963 * il_set_rxon_channel - Set the band and channel values in staging RXON
3964 * @ch: requested channel as a pointer to struct ieee80211_channel
3965
3966 * NOTE: Does not commit to the hardware; it sets appropriate bit fields
3967 * in the staging RXON flag structure based on the ch->band
3968 */
3969 int
3970 il_set_rxon_channel(struct il_priv *il, struct ieee80211_channel *ch)
3971 {
3972 enum nl80211_band band = ch->band;
3973 u16 channel = ch->hw_value;
3974
3975 if (le16_to_cpu(il->staging.channel) == channel && il->band == band)
3976 return 0;
3977
3978 il->staging.channel = cpu_to_le16(channel);
3979 if (band == NL80211_BAND_5GHZ)
3980 il->staging.flags &= ~RXON_FLG_BAND_24G_MSK;
3981 else
3982 il->staging.flags |= RXON_FLG_BAND_24G_MSK;
3983
3984 il->band = band;
3985
3986 D_INFO("Staging channel set to %d [%d]\n", channel, band);
3987
3988 return 0;
3989 }
3990 EXPORT_SYMBOL(il_set_rxon_channel);
3991
3992 void
3993 il_set_flags_for_band(struct il_priv *il, enum nl80211_band band,
3994 struct ieee80211_vif *vif)
3995 {
3996 if (band == NL80211_BAND_5GHZ) {
3997 il->staging.flags &=
3998 ~(RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK |
3999 RXON_FLG_CCK_MSK);
4000 il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
4001 } else {
4002 /* Copied from il_post_associate() */
4003 if (vif && vif->bss_conf.use_short_slot)
4004 il->staging.flags |= RXON_FLG_SHORT_SLOT_MSK;
4005 else
4006 il->staging.flags &= ~RXON_FLG_SHORT_SLOT_MSK;
4007
4008 il->staging.flags |= RXON_FLG_BAND_24G_MSK;
4009 il->staging.flags |= RXON_FLG_AUTO_DETECT_MSK;
4010 il->staging.flags &= ~RXON_FLG_CCK_MSK;
4011 }
4012 }
4013 EXPORT_SYMBOL(il_set_flags_for_band);
4014
4015 /*
4016 * initialize rxon structure with default values from eeprom
4017 */
4018 void
4019 il_connection_init_rx_config(struct il_priv *il)
4020 {
4021 const struct il_channel_info *ch_info;
4022
4023 memset(&il->staging, 0, sizeof(il->staging));
4024
4025 switch (il->iw_mode) {
4026 case NL80211_IFTYPE_UNSPECIFIED:
4027 il->staging.dev_type = RXON_DEV_TYPE_ESS;
4028 break;
4029 case NL80211_IFTYPE_STATION:
4030 il->staging.dev_type = RXON_DEV_TYPE_ESS;
4031 il->staging.filter_flags = RXON_FILTER_ACCEPT_GRP_MSK;
4032 break;
4033 case NL80211_IFTYPE_ADHOC:
4034 il->staging.dev_type = RXON_DEV_TYPE_IBSS;
4035 il->staging.flags = RXON_FLG_SHORT_PREAMBLE_MSK;
4036 il->staging.filter_flags =
4037 RXON_FILTER_BCON_AWARE_MSK | RXON_FILTER_ACCEPT_GRP_MSK;
4038 break;
4039 default:
4040 IL_ERR("Unsupported interface type %d\n", il->vif->type);
4041 return;
4042 }
4043
4044 #if 0
4045 /* TODO: Figure out when short_preamble would be set and cache from
4046 * that */
4047 if (!hw_to_local(il->hw)->short_preamble)
4048 il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
4049 else
4050 il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
4051 #endif
4052
4053 ch_info =
4054 il_get_channel_info(il, il->band, le16_to_cpu(il->active.channel));
4055
4056 if (!ch_info)
4057 ch_info = &il->channel_info[0];
4058
4059 il->staging.channel = cpu_to_le16(ch_info->channel);
4060 il->band = ch_info->band;
4061
4062 il_set_flags_for_band(il, il->band, il->vif);
4063
4064 il->staging.ofdm_basic_rates =
4065 (IL_OFDM_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
4066 il->staging.cck_basic_rates =
4067 (IL_CCK_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
4068
4069 /* clear both MIX and PURE40 mode flag */
4070 il->staging.flags &=
4071 ~(RXON_FLG_CHANNEL_MODE_MIXED | RXON_FLG_CHANNEL_MODE_PURE_40);
4072 if (il->vif)
4073 memcpy(il->staging.node_addr, il->vif->addr, ETH_ALEN);
4074
4075 il->staging.ofdm_ht_single_stream_basic_rates = 0xff;
4076 il->staging.ofdm_ht_dual_stream_basic_rates = 0xff;
4077 }
4078 EXPORT_SYMBOL(il_connection_init_rx_config);
4079
4080 void
4081 il_set_rate(struct il_priv *il)
4082 {
4083 const struct ieee80211_supported_band *hw = NULL;
4084 struct ieee80211_rate *rate;
4085 int i;
4086
4087 hw = il_get_hw_mode(il, il->band);
4088 if (!hw) {
4089 IL_ERR("Failed to set rate: unable to get hw mode\n");
4090 return;
4091 }
4092
4093 il->active_rate = 0;
4094
4095 for (i = 0; i < hw->n_bitrates; i++) {
4096 rate = &(hw->bitrates[i]);
4097 if (rate->hw_value < RATE_COUNT_LEGACY)
4098 il->active_rate |= (1 << rate->hw_value);
4099 }
4100
4101 D_RATE("Set active_rate = %0x\n", il->active_rate);
4102
4103 il->staging.cck_basic_rates =
4104 (IL_CCK_BASIC_RATES_MASK >> IL_FIRST_CCK_RATE) & 0xF;
4105
4106 il->staging.ofdm_basic_rates =
4107 (IL_OFDM_BASIC_RATES_MASK >> IL_FIRST_OFDM_RATE) & 0xFF;
4108 }
4109 EXPORT_SYMBOL(il_set_rate);
4110
4111 void
4112 il_chswitch_done(struct il_priv *il, bool is_success)
4113 {
4114 if (test_bit(S_EXIT_PENDING, &il->status))
4115 return;
4116
4117 if (test_and_clear_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4118 ieee80211_chswitch_done(il->vif, is_success);
4119 }
4120 EXPORT_SYMBOL(il_chswitch_done);
4121
4122 void
4123 il_hdl_csa(struct il_priv *il, struct il_rx_buf *rxb)
4124 {
4125 struct il_rx_pkt *pkt = rxb_addr(rxb);
4126 struct il_csa_notification *csa = &(pkt->u.csa_notif);
4127 struct il_rxon_cmd *rxon = (void *)&il->active;
4128
4129 if (!test_bit(S_CHANNEL_SWITCH_PENDING, &il->status))
4130 return;
4131
4132 if (!le32_to_cpu(csa->status) && csa->channel == il->switch_channel) {
4133 rxon->channel = csa->channel;
4134 il->staging.channel = csa->channel;
4135 D_11H("CSA notif: channel %d\n", le16_to_cpu(csa->channel));
4136 il_chswitch_done(il, true);
4137 } else {
4138 IL_ERR("CSA notif (fail) : channel %d\n",
4139 le16_to_cpu(csa->channel));
4140 il_chswitch_done(il, false);
4141 }
4142 }
4143 EXPORT_SYMBOL(il_hdl_csa);
4144
4145 #ifdef CONFIG_IWLEGACY_DEBUG
4146 void
4147 il_print_rx_config_cmd(struct il_priv *il)
4148 {
4149 struct il_rxon_cmd *rxon = &il->staging;
4150
4151 D_RADIO("RX CONFIG:\n");
4152 il_print_hex_dump(il, IL_DL_RADIO, (u8 *) rxon, sizeof(*rxon));
4153 D_RADIO("u16 channel: 0x%x\n", le16_to_cpu(rxon->channel));
4154 D_RADIO("u32 flags: 0x%08X\n", le32_to_cpu(rxon->flags));
4155 D_RADIO("u32 filter_flags: 0x%08x\n", le32_to_cpu(rxon->filter_flags));
4156 D_RADIO("u8 dev_type: 0x%x\n", rxon->dev_type);
4157 D_RADIO("u8 ofdm_basic_rates: 0x%02x\n", rxon->ofdm_basic_rates);
4158 D_RADIO("u8 cck_basic_rates: 0x%02x\n", rxon->cck_basic_rates);
4159 D_RADIO("u8[6] node_addr: %pM\n", rxon->node_addr);
4160 D_RADIO("u8[6] bssid_addr: %pM\n", rxon->bssid_addr);
4161 D_RADIO("u16 assoc_id: 0x%x\n", le16_to_cpu(rxon->assoc_id));
4162 }
4163 EXPORT_SYMBOL(il_print_rx_config_cmd);
4164 #endif
4165 /**
4166 * il_irq_handle_error - called for HW or SW error interrupt from card
4167 */
4168 void
4169 il_irq_handle_error(struct il_priv *il)
4170 {
4171 /* Set the FW error flag -- cleared on il_down */
4172 set_bit(S_FW_ERROR, &il->status);
4173
4174 /* Cancel currently queued command. */
4175 clear_bit(S_HCMD_ACTIVE, &il->status);
4176
4177 IL_ERR("Loaded firmware version: %s\n", il->hw->wiphy->fw_version);
4178
4179 il->ops->dump_nic_error_log(il);
4180 if (il->ops->dump_fh)
4181 il->ops->dump_fh(il, NULL, false);
4182 #ifdef CONFIG_IWLEGACY_DEBUG
4183 if (il_get_debug_level(il) & IL_DL_FW_ERRORS)
4184 il_print_rx_config_cmd(il);
4185 #endif
4186
4187 wake_up(&il->wait_command_queue);
4188
4189 /* Keep the restart process from trying to send host
4190 * commands by clearing the INIT status bit */
4191 clear_bit(S_READY, &il->status);
4192
4193 if (!test_bit(S_EXIT_PENDING, &il->status)) {
4194 IL_DBG(IL_DL_FW_ERRORS,
4195 "Restarting adapter due to uCode error.\n");
4196
4197 if (il->cfg->mod_params->restart_fw)
4198 queue_work(il->workqueue, &il->restart);
4199 }
4200 }
4201 EXPORT_SYMBOL(il_irq_handle_error);
4202
4203 static int
4204 _il_apm_stop_master(struct il_priv *il)
4205 {
4206 int ret = 0;
4207
4208 /* stop device's busmaster DMA activity */
4209 _il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_STOP_MASTER);
4210
4211 ret =
4212 _il_poll_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_MASTER_DISABLED,
4213 CSR_RESET_REG_FLAG_MASTER_DISABLED, 100);
4214 if (ret < 0)
4215 IL_WARN("Master Disable Timed Out, 100 usec\n");
4216
4217 D_INFO("stop master\n");
4218
4219 return ret;
4220 }
4221
4222 void
4223 _il_apm_stop(struct il_priv *il)
4224 {
4225 lockdep_assert_held(&il->reg_lock);
4226
4227 D_INFO("Stop card, put in low power state\n");
4228
4229 /* Stop device's DMA activity */
4230 _il_apm_stop_master(il);
4231
4232 /* Reset the entire device */
4233 _il_set_bit(il, CSR_RESET, CSR_RESET_REG_FLAG_SW_RESET);
4234
4235 udelay(10);
4236
4237 /*
4238 * Clear "initialization complete" bit to move adapter from
4239 * D0A* (powered-up Active) --> D0U* (Uninitialized) state.
4240 */
4241 _il_clear_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4242 }
4243 EXPORT_SYMBOL(_il_apm_stop);
4244
4245 void
4246 il_apm_stop(struct il_priv *il)
4247 {
4248 unsigned long flags;
4249
4250 spin_lock_irqsave(&il->reg_lock, flags);
4251 _il_apm_stop(il);
4252 spin_unlock_irqrestore(&il->reg_lock, flags);
4253 }
4254 EXPORT_SYMBOL(il_apm_stop);
4255
4256 /*
4257 * Start up NIC's basic functionality after it has been reset
4258 * (e.g. after platform boot, or shutdown via il_apm_stop())
4259 * NOTE: This does not load uCode nor start the embedded processor
4260 */
4261 int
4262 il_apm_init(struct il_priv *il)
4263 {
4264 int ret = 0;
4265 u16 lctl;
4266
4267 D_INFO("Init card's basic functions\n");
4268
4269 /*
4270 * Use "set_bit" below rather than "write", to preserve any hardware
4271 * bits already set by default after reset.
4272 */
4273
4274 /* Disable L0S exit timer (platform NMI Work/Around) */
4275 il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4276 CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER);
4277
4278 /*
4279 * Disable L0s without affecting L1;
4280 * don't wait for ICH L0s (ICH bug W/A)
4281 */
4282 il_set_bit(il, CSR_GIO_CHICKEN_BITS,
4283 CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX);
4284
4285 /* Set FH wait threshold to maximum (HW error during stress W/A) */
4286 il_set_bit(il, CSR_DBG_HPET_MEM_REG, CSR_DBG_HPET_MEM_REG_VAL);
4287
4288 /*
4289 * Enable HAP INTA (interrupt from management bus) to
4290 * wake device's PCI Express link L1a -> L0s
4291 * NOTE: This is no-op for 3945 (non-existent bit)
4292 */
4293 il_set_bit(il, CSR_HW_IF_CONFIG_REG,
4294 CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A);
4295
4296 /*
4297 * HW bug W/A for instability in PCIe bus L0->L0S->L1 transition.
4298 * Check if BIOS (or OS) enabled L1-ASPM on this device.
4299 * If so (likely), disable L0S, so device moves directly L0->L1;
4300 * costs negligible amount of power savings.
4301 * If not (unlikely), enable L0S, so there is at least some
4302 * power savings, even without L1.
4303 */
4304 if (il->cfg->set_l0s) {
4305 pcie_capability_read_word(il->pci_dev, PCI_EXP_LNKCTL, &lctl);
4306 if (lctl & PCI_EXP_LNKCTL_ASPM_L1) {
4307 /* L1-ASPM enabled; disable(!) L0S */
4308 il_set_bit(il, CSR_GIO_REG,
4309 CSR_GIO_REG_VAL_L0S_ENABLED);
4310 D_POWER("L1 Enabled; Disabling L0S\n");
4311 } else {
4312 /* L1-ASPM disabled; enable(!) L0S */
4313 il_clear_bit(il, CSR_GIO_REG,
4314 CSR_GIO_REG_VAL_L0S_ENABLED);
4315 D_POWER("L1 Disabled; Enabling L0S\n");
4316 }
4317 }
4318
4319 /* Configure analog phase-lock-loop before activating to D0A */
4320 if (il->cfg->pll_cfg_val)
4321 il_set_bit(il, CSR_ANA_PLL_CFG,
4322 il->cfg->pll_cfg_val);
4323
4324 /*
4325 * Set "initialization complete" bit to move adapter from
4326 * D0U* --> D0A* (powered-up active) state.
4327 */
4328 il_set_bit(il, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_INIT_DONE);
4329
4330 /*
4331 * Wait for clock stabilization; once stabilized, access to
4332 * device-internal resources is supported, e.g. il_wr_prph()
4333 * and accesses to uCode SRAM.
4334 */
4335 ret =
4336 _il_poll_bit(il, CSR_GP_CNTRL,
4337 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY,
4338 CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY, 25000);
4339 if (ret < 0) {
4340 D_INFO("Failed to init the card\n");
4341 goto out;
4342 }
4343
4344 /*
4345 * Enable DMA and BSM (if used) clocks, wait for them to stabilize.
4346 * BSM (Boostrap State Machine) is only in 3945 and 4965.
4347 *
4348 * Write to "CLK_EN_REG"; "1" bits enable clocks, while "0" bits
4349 * do not disable clocks. This preserves any hardware bits already
4350 * set by default in "CLK_CTRL_REG" after reset.
4351 */
4352 if (il->cfg->use_bsm)
4353 il_wr_prph(il, APMG_CLK_EN_REG,
4354 APMG_CLK_VAL_DMA_CLK_RQT | APMG_CLK_VAL_BSM_CLK_RQT);
4355 else
4356 il_wr_prph(il, APMG_CLK_EN_REG, APMG_CLK_VAL_DMA_CLK_RQT);
4357 udelay(20);
4358
4359 /* Disable L1-Active */
4360 il_set_bits_prph(il, APMG_PCIDEV_STT_REG,
4361 APMG_PCIDEV_STT_VAL_L1_ACT_DIS);
4362
4363 out:
4364 return ret;
4365 }
4366 EXPORT_SYMBOL(il_apm_init);
4367
4368 int
4369 il_set_tx_power(struct il_priv *il, s8 tx_power, bool force)
4370 {
4371 int ret;
4372 s8 prev_tx_power;
4373 bool defer;
4374
4375 lockdep_assert_held(&il->mutex);
4376
4377 if (il->tx_power_user_lmt == tx_power && !force)
4378 return 0;
4379
4380 if (!il->ops->send_tx_power)
4381 return -EOPNOTSUPP;
4382
4383 /* 0 dBm mean 1 milliwatt */
4384 if (tx_power < 0) {
4385 IL_WARN("Requested user TXPOWER %d below 1 mW.\n", tx_power);
4386 return -EINVAL;
4387 }
4388
4389 if (tx_power > il->tx_power_device_lmt) {
4390 IL_WARN("Requested user TXPOWER %d above upper limit %d.\n",
4391 tx_power, il->tx_power_device_lmt);
4392 return -EINVAL;
4393 }
4394
4395 if (!il_is_ready_rf(il))
4396 return -EIO;
4397
4398 /* scan complete and commit_rxon use tx_power_next value,
4399 * it always need to be updated for newest request */
4400 il->tx_power_next = tx_power;
4401
4402 /* do not set tx power when scanning or channel changing */
4403 defer = test_bit(S_SCANNING, &il->status) ||
4404 memcmp(&il->active, &il->staging, sizeof(il->staging));
4405 if (defer && !force) {
4406 D_INFO("Deferring tx power set\n");
4407 return 0;
4408 }
4409
4410 prev_tx_power = il->tx_power_user_lmt;
4411 il->tx_power_user_lmt = tx_power;
4412
4413 ret = il->ops->send_tx_power(il);
4414
4415 /* if fail to set tx_power, restore the orig. tx power */
4416 if (ret) {
4417 il->tx_power_user_lmt = prev_tx_power;
4418 il->tx_power_next = prev_tx_power;
4419 }
4420 return ret;
4421 }
4422 EXPORT_SYMBOL(il_set_tx_power);
4423
4424 void
4425 il_send_bt_config(struct il_priv *il)
4426 {
4427 struct il_bt_cmd bt_cmd = {
4428 .lead_time = BT_LEAD_TIME_DEF,
4429 .max_kill = BT_MAX_KILL_DEF,
4430 .kill_ack_mask = 0,
4431 .kill_cts_mask = 0,
4432 };
4433
4434 if (!bt_coex_active)
4435 bt_cmd.flags = BT_COEX_DISABLE;
4436 else
4437 bt_cmd.flags = BT_COEX_ENABLE;
4438
4439 D_INFO("BT coex %s\n",
4440 (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active");
4441
4442 if (il_send_cmd_pdu(il, C_BT_CONFIG, sizeof(struct il_bt_cmd), &bt_cmd))
4443 IL_ERR("failed to send BT Coex Config\n");
4444 }
4445 EXPORT_SYMBOL(il_send_bt_config);
4446
4447 int
4448 il_send_stats_request(struct il_priv *il, u8 flags, bool clear)
4449 {
4450 struct il_stats_cmd stats_cmd = {
4451 .configuration_flags = clear ? IL_STATS_CONF_CLEAR_STATS : 0,
4452 };
4453
4454 if (flags & CMD_ASYNC)
4455 return il_send_cmd_pdu_async(il, C_STATS, sizeof(struct il_stats_cmd),
4456 &stats_cmd, NULL);
4457 else
4458 return il_send_cmd_pdu(il, C_STATS, sizeof(struct il_stats_cmd),
4459 &stats_cmd);
4460 }
4461 EXPORT_SYMBOL(il_send_stats_request);
4462
4463 void
4464 il_hdl_pm_sleep(struct il_priv *il, struct il_rx_buf *rxb)
4465 {
4466 #ifdef CONFIG_IWLEGACY_DEBUG
4467 struct il_rx_pkt *pkt = rxb_addr(rxb);
4468 struct il_sleep_notification *sleep = &(pkt->u.sleep_notif);
4469 D_RX("sleep mode: %d, src: %d\n",
4470 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
4471 #endif
4472 }
4473 EXPORT_SYMBOL(il_hdl_pm_sleep);
4474
4475 void
4476 il_hdl_pm_debug_stats(struct il_priv *il, struct il_rx_buf *rxb)
4477 {
4478 struct il_rx_pkt *pkt = rxb_addr(rxb);
4479 u32 len = le32_to_cpu(pkt->len_n_flags) & IL_RX_FRAME_SIZE_MSK;
4480 D_RADIO("Dumping %d bytes of unhandled notification for %s:\n", len,
4481 il_get_cmd_string(pkt->hdr.cmd));
4482 il_print_hex_dump(il, IL_DL_RADIO, pkt->u.raw, len);
4483 }
4484 EXPORT_SYMBOL(il_hdl_pm_debug_stats);
4485
4486 void
4487 il_hdl_error(struct il_priv *il, struct il_rx_buf *rxb)
4488 {
4489 struct il_rx_pkt *pkt = rxb_addr(rxb);
4490
4491 IL_ERR("Error Reply type 0x%08X cmd %s (0x%02X) "
4492 "seq 0x%04X ser 0x%08X\n",
4493 le32_to_cpu(pkt->u.err_resp.error_type),
4494 il_get_cmd_string(pkt->u.err_resp.cmd_id),
4495 pkt->u.err_resp.cmd_id,
4496 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
4497 le32_to_cpu(pkt->u.err_resp.error_info));
4498 }
4499 EXPORT_SYMBOL(il_hdl_error);
4500
4501 void
4502 il_clear_isr_stats(struct il_priv *il)
4503 {
4504 memset(&il->isr_stats, 0, sizeof(il->isr_stats));
4505 }
4506
4507 int
4508 il_mac_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u16 queue,
4509 const struct ieee80211_tx_queue_params *params)
4510 {
4511 struct il_priv *il = hw->priv;
4512 unsigned long flags;
4513 int q;
4514
4515 D_MAC80211("enter\n");
4516
4517 if (!il_is_ready_rf(il)) {
4518 D_MAC80211("leave - RF not ready\n");
4519 return -EIO;
4520 }
4521
4522 if (queue >= AC_NUM) {
4523 D_MAC80211("leave - queue >= AC_NUM %d\n", queue);
4524 return 0;
4525 }
4526
4527 q = AC_NUM - 1 - queue;
4528
4529 spin_lock_irqsave(&il->lock, flags);
4530
4531 il->qos_data.def_qos_parm.ac[q].cw_min =
4532 cpu_to_le16(params->cw_min);
4533 il->qos_data.def_qos_parm.ac[q].cw_max =
4534 cpu_to_le16(params->cw_max);
4535 il->qos_data.def_qos_parm.ac[q].aifsn = params->aifs;
4536 il->qos_data.def_qos_parm.ac[q].edca_txop =
4537 cpu_to_le16((params->txop * 32));
4538
4539 il->qos_data.def_qos_parm.ac[q].reserved1 = 0;
4540
4541 spin_unlock_irqrestore(&il->lock, flags);
4542
4543 D_MAC80211("leave\n");
4544 return 0;
4545 }
4546 EXPORT_SYMBOL(il_mac_conf_tx);
4547
4548 int
4549 il_mac_tx_last_beacon(struct ieee80211_hw *hw)
4550 {
4551 struct il_priv *il = hw->priv;
4552 int ret;
4553
4554 D_MAC80211("enter\n");
4555
4556 ret = (il->ibss_manager == IL_IBSS_MANAGER);
4557
4558 D_MAC80211("leave ret %d\n", ret);
4559 return ret;
4560 }
4561 EXPORT_SYMBOL_GPL(il_mac_tx_last_beacon);
4562
4563 static int
4564 il_set_mode(struct il_priv *il)
4565 {
4566 il_connection_init_rx_config(il);
4567
4568 if (il->ops->set_rxon_chain)
4569 il->ops->set_rxon_chain(il);
4570
4571 return il_commit_rxon(il);
4572 }
4573
4574 int
4575 il_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4576 {
4577 struct il_priv *il = hw->priv;
4578 int err;
4579 bool reset;
4580
4581 mutex_lock(&il->mutex);
4582 D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
4583
4584 if (!il_is_ready_rf(il)) {
4585 IL_WARN("Try to add interface when device not ready\n");
4586 err = -EINVAL;
4587 goto out;
4588 }
4589
4590 /*
4591 * We do not support multiple virtual interfaces, but on hardware reset
4592 * we have to add the same interface again.
4593 */
4594 reset = (il->vif == vif);
4595 if (il->vif && !reset) {
4596 err = -EOPNOTSUPP;
4597 goto out;
4598 }
4599
4600 il->vif = vif;
4601 il->iw_mode = vif->type;
4602
4603 err = il_set_mode(il);
4604 if (err) {
4605 IL_WARN("Fail to set mode %d\n", vif->type);
4606 if (!reset) {
4607 il->vif = NULL;
4608 il->iw_mode = NL80211_IFTYPE_STATION;
4609 }
4610 }
4611
4612 out:
4613 D_MAC80211("leave err %d\n", err);
4614 mutex_unlock(&il->mutex);
4615
4616 return err;
4617 }
4618 EXPORT_SYMBOL(il_mac_add_interface);
4619
4620 static void
4621 il_teardown_interface(struct il_priv *il, struct ieee80211_vif *vif)
4622 {
4623 lockdep_assert_held(&il->mutex);
4624
4625 if (il->scan_vif == vif) {
4626 il_scan_cancel_timeout(il, 200);
4627 il_force_scan_end(il);
4628 }
4629
4630 il_set_mode(il);
4631 }
4632
4633 void
4634 il_mac_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
4635 {
4636 struct il_priv *il = hw->priv;
4637
4638 mutex_lock(&il->mutex);
4639 D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
4640
4641 WARN_ON(il->vif != vif);
4642 il->vif = NULL;
4643 il->iw_mode = NL80211_IFTYPE_UNSPECIFIED;
4644 il_teardown_interface(il, vif);
4645 eth_zero_addr(il->bssid);
4646
4647 D_MAC80211("leave\n");
4648 mutex_unlock(&il->mutex);
4649 }
4650 EXPORT_SYMBOL(il_mac_remove_interface);
4651
4652 int
4653 il_alloc_txq_mem(struct il_priv *il)
4654 {
4655 if (!il->txq)
4656 il->txq =
4657 kzalloc(sizeof(struct il_tx_queue) *
4658 il->cfg->num_of_queues, GFP_KERNEL);
4659 if (!il->txq) {
4660 IL_ERR("Not enough memory for txq\n");
4661 return -ENOMEM;
4662 }
4663 return 0;
4664 }
4665 EXPORT_SYMBOL(il_alloc_txq_mem);
4666
4667 void
4668 il_free_txq_mem(struct il_priv *il)
4669 {
4670 kfree(il->txq);
4671 il->txq = NULL;
4672 }
4673 EXPORT_SYMBOL(il_free_txq_mem);
4674
4675 int
4676 il_force_reset(struct il_priv *il, bool external)
4677 {
4678 struct il_force_reset *force_reset;
4679
4680 if (test_bit(S_EXIT_PENDING, &il->status))
4681 return -EINVAL;
4682
4683 force_reset = &il->force_reset;
4684 force_reset->reset_request_count++;
4685 if (!external) {
4686 if (force_reset->last_force_reset_jiffies &&
4687 time_after(force_reset->last_force_reset_jiffies +
4688 force_reset->reset_duration, jiffies)) {
4689 D_INFO("force reset rejected\n");
4690 force_reset->reset_reject_count++;
4691 return -EAGAIN;
4692 }
4693 }
4694 force_reset->reset_success_count++;
4695 force_reset->last_force_reset_jiffies = jiffies;
4696
4697 /*
4698 * if the request is from external(ex: debugfs),
4699 * then always perform the request in regardless the module
4700 * parameter setting
4701 * if the request is from internal (uCode error or driver
4702 * detect failure), then fw_restart module parameter
4703 * need to be check before performing firmware reload
4704 */
4705
4706 if (!external && !il->cfg->mod_params->restart_fw) {
4707 D_INFO("Cancel firmware reload based on "
4708 "module parameter setting\n");
4709 return 0;
4710 }
4711
4712 IL_ERR("On demand firmware reload\n");
4713
4714 /* Set the FW error flag -- cleared on il_down */
4715 set_bit(S_FW_ERROR, &il->status);
4716 wake_up(&il->wait_command_queue);
4717 /*
4718 * Keep the restart process from trying to send host
4719 * commands by clearing the INIT status bit
4720 */
4721 clear_bit(S_READY, &il->status);
4722 queue_work(il->workqueue, &il->restart);
4723
4724 return 0;
4725 }
4726 EXPORT_SYMBOL(il_force_reset);
4727
4728 int
4729 il_mac_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4730 enum nl80211_iftype newtype, bool newp2p)
4731 {
4732 struct il_priv *il = hw->priv;
4733 int err;
4734
4735 mutex_lock(&il->mutex);
4736 D_MAC80211("enter: type %d, addr %pM newtype %d newp2p %d\n",
4737 vif->type, vif->addr, newtype, newp2p);
4738
4739 if (newp2p) {
4740 err = -EOPNOTSUPP;
4741 goto out;
4742 }
4743
4744 if (!il->vif || !il_is_ready_rf(il)) {
4745 /*
4746 * Huh? But wait ... this can maybe happen when
4747 * we're in the middle of a firmware restart!
4748 */
4749 err = -EBUSY;
4750 goto out;
4751 }
4752
4753 /* success */
4754 vif->type = newtype;
4755 vif->p2p = false;
4756 il->iw_mode = newtype;
4757 il_teardown_interface(il, vif);
4758 err = 0;
4759
4760 out:
4761 D_MAC80211("leave err %d\n", err);
4762 mutex_unlock(&il->mutex);
4763
4764 return err;
4765 }
4766 EXPORT_SYMBOL(il_mac_change_interface);
4767
4768 void il_mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
4769 u32 queues, bool drop)
4770 {
4771 struct il_priv *il = hw->priv;
4772 unsigned long timeout = jiffies + msecs_to_jiffies(500);
4773 int i;
4774
4775 mutex_lock(&il->mutex);
4776 D_MAC80211("enter\n");
4777
4778 if (il->txq == NULL)
4779 goto out;
4780
4781 for (i = 0; i < il->hw_params.max_txq_num; i++) {
4782 struct il_queue *q;
4783
4784 if (i == il->cmd_queue)
4785 continue;
4786
4787 q = &il->txq[i].q;
4788 if (q->read_ptr == q->write_ptr)
4789 continue;
4790
4791 if (time_after(jiffies, timeout)) {
4792 IL_ERR("Failed to flush queue %d\n", q->id);
4793 break;
4794 }
4795
4796 msleep(20);
4797 }
4798 out:
4799 D_MAC80211("leave\n");
4800 mutex_unlock(&il->mutex);
4801 }
4802 EXPORT_SYMBOL(il_mac_flush);
4803
4804 /*
4805 * On every watchdog tick we check (latest) time stamp. If it does not
4806 * change during timeout period and queue is not empty we reset firmware.
4807 */
4808 static int
4809 il_check_stuck_queue(struct il_priv *il, int cnt)
4810 {
4811 struct il_tx_queue *txq = &il->txq[cnt];
4812 struct il_queue *q = &txq->q;
4813 unsigned long timeout;
4814 unsigned long now = jiffies;
4815 int ret;
4816
4817 if (q->read_ptr == q->write_ptr) {
4818 txq->time_stamp = now;
4819 return 0;
4820 }
4821
4822 timeout =
4823 txq->time_stamp +
4824 msecs_to_jiffies(il->cfg->wd_timeout);
4825
4826 if (time_after(now, timeout)) {
4827 IL_ERR("Queue %d stuck for %u ms.\n", q->id,
4828 jiffies_to_msecs(now - txq->time_stamp));
4829 ret = il_force_reset(il, false);
4830 return (ret == -EAGAIN) ? 0 : 1;
4831 }
4832
4833 return 0;
4834 }
4835
4836 /*
4837 * Making watchdog tick be a quarter of timeout assure we will
4838 * discover the queue hung between timeout and 1.25*timeout
4839 */
4840 #define IL_WD_TICK(timeout) ((timeout) / 4)
4841
4842 /*
4843 * Watchdog timer callback, we check each tx queue for stuck, if if hung
4844 * we reset the firmware. If everything is fine just rearm the timer.
4845 */
4846 void
4847 il_bg_watchdog(struct timer_list *t)
4848 {
4849 struct il_priv *il = from_timer(il, t, watchdog);
4850 int cnt;
4851 unsigned long timeout;
4852
4853 if (test_bit(S_EXIT_PENDING, &il->status))
4854 return;
4855
4856 timeout = il->cfg->wd_timeout;
4857 if (timeout == 0)
4858 return;
4859
4860 /* monitor and check for stuck cmd queue */
4861 if (il_check_stuck_queue(il, il->cmd_queue))
4862 return;
4863
4864 /* monitor and check for other stuck queues */
4865 for (cnt = 0; cnt < il->hw_params.max_txq_num; cnt++) {
4866 /* skip as we already checked the command queue */
4867 if (cnt == il->cmd_queue)
4868 continue;
4869 if (il_check_stuck_queue(il, cnt))
4870 return;
4871 }
4872
4873 mod_timer(&il->watchdog,
4874 jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
4875 }
4876 EXPORT_SYMBOL(il_bg_watchdog);
4877
4878 void
4879 il_setup_watchdog(struct il_priv *il)
4880 {
4881 unsigned int timeout = il->cfg->wd_timeout;
4882
4883 if (timeout)
4884 mod_timer(&il->watchdog,
4885 jiffies + msecs_to_jiffies(IL_WD_TICK(timeout)));
4886 else
4887 del_timer(&il->watchdog);
4888 }
4889 EXPORT_SYMBOL(il_setup_watchdog);
4890
4891 /*
4892 * extended beacon time format
4893 * time in usec will be changed into a 32-bit value in extended:internal format
4894 * the extended part is the beacon counts
4895 * the internal part is the time in usec within one beacon interval
4896 */
4897 u32
4898 il_usecs_to_beacons(struct il_priv *il, u32 usec, u32 beacon_interval)
4899 {
4900 u32 quot;
4901 u32 rem;
4902 u32 interval = beacon_interval * TIME_UNIT;
4903
4904 if (!interval || !usec)
4905 return 0;
4906
4907 quot =
4908 (usec /
4909 interval) & (il_beacon_time_mask_high(il,
4910 il->hw_params.
4911 beacon_time_tsf_bits) >> il->
4912 hw_params.beacon_time_tsf_bits);
4913 rem =
4914 (usec % interval) & il_beacon_time_mask_low(il,
4915 il->hw_params.
4916 beacon_time_tsf_bits);
4917
4918 return (quot << il->hw_params.beacon_time_tsf_bits) + rem;
4919 }
4920 EXPORT_SYMBOL(il_usecs_to_beacons);
4921
4922 /* base is usually what we get from ucode with each received frame,
4923 * the same as HW timer counter counting down
4924 */
4925 __le32
4926 il_add_beacon_time(struct il_priv *il, u32 base, u32 addon,
4927 u32 beacon_interval)
4928 {
4929 u32 base_low = base & il_beacon_time_mask_low(il,
4930 il->hw_params.
4931 beacon_time_tsf_bits);
4932 u32 addon_low = addon & il_beacon_time_mask_low(il,
4933 il->hw_params.
4934 beacon_time_tsf_bits);
4935 u32 interval = beacon_interval * TIME_UNIT;
4936 u32 res = (base & il_beacon_time_mask_high(il,
4937 il->hw_params.
4938 beacon_time_tsf_bits)) +
4939 (addon & il_beacon_time_mask_high(il,
4940 il->hw_params.
4941 beacon_time_tsf_bits));
4942
4943 if (base_low > addon_low)
4944 res += base_low - addon_low;
4945 else if (base_low < addon_low) {
4946 res += interval + base_low - addon_low;
4947 res += (1 << il->hw_params.beacon_time_tsf_bits);
4948 } else
4949 res += (1 << il->hw_params.beacon_time_tsf_bits);
4950
4951 return cpu_to_le32(res);
4952 }
4953 EXPORT_SYMBOL(il_add_beacon_time);
4954
4955 #ifdef CONFIG_PM_SLEEP
4956
4957 static int
4958 il_pci_suspend(struct device *device)
4959 {
4960 struct pci_dev *pdev = to_pci_dev(device);
4961 struct il_priv *il = pci_get_drvdata(pdev);
4962
4963 /*
4964 * This function is called when system goes into suspend state
4965 * mac80211 will call il_mac_stop() from the mac80211 suspend function
4966 * first but since il_mac_stop() has no knowledge of who the caller is,
4967 * it will not call apm_ops.stop() to stop the DMA operation.
4968 * Calling apm_ops.stop here to make sure we stop the DMA.
4969 */
4970 il_apm_stop(il);
4971
4972 return 0;
4973 }
4974
4975 static int
4976 il_pci_resume(struct device *device)
4977 {
4978 struct pci_dev *pdev = to_pci_dev(device);
4979 struct il_priv *il = pci_get_drvdata(pdev);
4980 bool hw_rfkill = false;
4981
4982 /*
4983 * We disable the RETRY_TIMEOUT register (0x41) to keep
4984 * PCI Tx retries from interfering with C3 CPU state.
4985 */
4986 pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
4987
4988 il_enable_interrupts(il);
4989
4990 if (!(_il_rd(il, CSR_GP_CNTRL) & CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW))
4991 hw_rfkill = true;
4992
4993 if (hw_rfkill)
4994 set_bit(S_RFKILL, &il->status);
4995 else
4996 clear_bit(S_RFKILL, &il->status);
4997
4998 wiphy_rfkill_set_hw_state(il->hw->wiphy, hw_rfkill);
4999
5000 return 0;
5001 }
5002
5003 SIMPLE_DEV_PM_OPS(il_pm_ops, il_pci_suspend, il_pci_resume);
5004 EXPORT_SYMBOL(il_pm_ops);
5005
5006 #endif /* CONFIG_PM_SLEEP */
5007
5008 static void
5009 il_update_qos(struct il_priv *il)
5010 {
5011 if (test_bit(S_EXIT_PENDING, &il->status))
5012 return;
5013
5014 il->qos_data.def_qos_parm.qos_flags = 0;
5015
5016 if (il->qos_data.qos_active)
5017 il->qos_data.def_qos_parm.qos_flags |=
5018 QOS_PARAM_FLG_UPDATE_EDCA_MSK;
5019
5020 if (il->ht.enabled)
5021 il->qos_data.def_qos_parm.qos_flags |= QOS_PARAM_FLG_TGN_MSK;
5022
5023 D_QOS("send QoS cmd with Qos active=%d FLAGS=0x%X\n",
5024 il->qos_data.qos_active, il->qos_data.def_qos_parm.qos_flags);
5025
5026 il_send_cmd_pdu_async(il, C_QOS_PARAM, sizeof(struct il_qosparam_cmd),
5027 &il->qos_data.def_qos_parm, NULL);
5028 }
5029
5030 /**
5031 * il_mac_config - mac80211 config callback
5032 */
5033 int
5034 il_mac_config(struct ieee80211_hw *hw, u32 changed)
5035 {
5036 struct il_priv *il = hw->priv;
5037 const struct il_channel_info *ch_info;
5038 struct ieee80211_conf *conf = &hw->conf;
5039 struct ieee80211_channel *channel = conf->chandef.chan;
5040 struct il_ht_config *ht_conf = &il->current_ht_config;
5041 unsigned long flags = 0;
5042 int ret = 0;
5043 u16 ch;
5044 int scan_active = 0;
5045 bool ht_changed = false;
5046
5047 mutex_lock(&il->mutex);
5048 D_MAC80211("enter: channel %d changed 0x%X\n", channel->hw_value,
5049 changed);
5050
5051 if (unlikely(test_bit(S_SCANNING, &il->status))) {
5052 scan_active = 1;
5053 D_MAC80211("scan active\n");
5054 }
5055
5056 if (changed &
5057 (IEEE80211_CONF_CHANGE_SMPS | IEEE80211_CONF_CHANGE_CHANNEL)) {
5058 /* mac80211 uses static for non-HT which is what we want */
5059 il->current_ht_config.smps = conf->smps_mode;
5060
5061 /*
5062 * Recalculate chain counts.
5063 *
5064 * If monitor mode is enabled then mac80211 will
5065 * set up the SM PS mode to OFF if an HT channel is
5066 * configured.
5067 */
5068 if (il->ops->set_rxon_chain)
5069 il->ops->set_rxon_chain(il);
5070 }
5071
5072 /* during scanning mac80211 will delay channel setting until
5073 * scan finish with changed = 0
5074 */
5075 if (!changed || (changed & IEEE80211_CONF_CHANGE_CHANNEL)) {
5076
5077 if (scan_active)
5078 goto set_ch_out;
5079
5080 ch = channel->hw_value;
5081 ch_info = il_get_channel_info(il, channel->band, ch);
5082 if (!il_is_channel_valid(ch_info)) {
5083 D_MAC80211("leave - invalid channel\n");
5084 ret = -EINVAL;
5085 goto set_ch_out;
5086 }
5087
5088 if (il->iw_mode == NL80211_IFTYPE_ADHOC &&
5089 !il_is_channel_ibss(ch_info)) {
5090 D_MAC80211("leave - not IBSS channel\n");
5091 ret = -EINVAL;
5092 goto set_ch_out;
5093 }
5094
5095 spin_lock_irqsave(&il->lock, flags);
5096
5097 /* Configure HT40 channels */
5098 if (il->ht.enabled != conf_is_ht(conf)) {
5099 il->ht.enabled = conf_is_ht(conf);
5100 ht_changed = true;
5101 }
5102 if (il->ht.enabled) {
5103 if (conf_is_ht40_minus(conf)) {
5104 il->ht.extension_chan_offset =
5105 IEEE80211_HT_PARAM_CHA_SEC_BELOW;
5106 il->ht.is_40mhz = true;
5107 } else if (conf_is_ht40_plus(conf)) {
5108 il->ht.extension_chan_offset =
5109 IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
5110 il->ht.is_40mhz = true;
5111 } else {
5112 il->ht.extension_chan_offset =
5113 IEEE80211_HT_PARAM_CHA_SEC_NONE;
5114 il->ht.is_40mhz = false;
5115 }
5116 } else
5117 il->ht.is_40mhz = false;
5118
5119 /*
5120 * Default to no protection. Protection mode will
5121 * later be set from BSS config in il_ht_conf
5122 */
5123 il->ht.protection = IEEE80211_HT_OP_MODE_PROTECTION_NONE;
5124
5125 /* if we are switching from ht to 2.4 clear flags
5126 * from any ht related info since 2.4 does not
5127 * support ht */
5128 if ((le16_to_cpu(il->staging.channel) != ch))
5129 il->staging.flags = 0;
5130
5131 il_set_rxon_channel(il, channel);
5132 il_set_rxon_ht(il, ht_conf);
5133
5134 il_set_flags_for_band(il, channel->band, il->vif);
5135
5136 spin_unlock_irqrestore(&il->lock, flags);
5137
5138 if (il->ops->update_bcast_stations)
5139 ret = il->ops->update_bcast_stations(il);
5140
5141 set_ch_out:
5142 /* The list of supported rates and rate mask can be different
5143 * for each band; since the band may have changed, reset
5144 * the rate mask to what mac80211 lists */
5145 il_set_rate(il);
5146 }
5147
5148 if (changed & (IEEE80211_CONF_CHANGE_PS | IEEE80211_CONF_CHANGE_IDLE)) {
5149 il->power_data.ps_disabled = !(conf->flags & IEEE80211_CONF_PS);
5150 if (!il->power_data.ps_disabled)
5151 IL_WARN_ONCE("Enabling power save might cause firmware crashes\n");
5152 ret = il_power_update_mode(il, false);
5153 if (ret)
5154 D_MAC80211("Error setting sleep level\n");
5155 }
5156
5157 if (changed & IEEE80211_CONF_CHANGE_POWER) {
5158 D_MAC80211("TX Power old=%d new=%d\n", il->tx_power_user_lmt,
5159 conf->power_level);
5160
5161 il_set_tx_power(il, conf->power_level, false);
5162 }
5163
5164 if (!il_is_ready(il)) {
5165 D_MAC80211("leave - not ready\n");
5166 goto out;
5167 }
5168
5169 if (scan_active)
5170 goto out;
5171
5172 if (memcmp(&il->active, &il->staging, sizeof(il->staging)))
5173 il_commit_rxon(il);
5174 else
5175 D_INFO("Not re-sending same RXON configuration.\n");
5176 if (ht_changed)
5177 il_update_qos(il);
5178
5179 out:
5180 D_MAC80211("leave ret %d\n", ret);
5181 mutex_unlock(&il->mutex);
5182
5183 return ret;
5184 }
5185 EXPORT_SYMBOL(il_mac_config);
5186
5187 void
5188 il_mac_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5189 {
5190 struct il_priv *il = hw->priv;
5191 unsigned long flags;
5192
5193 mutex_lock(&il->mutex);
5194 D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr);
5195
5196 spin_lock_irqsave(&il->lock, flags);
5197
5198 memset(&il->current_ht_config, 0, sizeof(struct il_ht_config));
5199
5200 /* new association get rid of ibss beacon skb */
5201 if (il->beacon_skb)
5202 dev_kfree_skb(il->beacon_skb);
5203 il->beacon_skb = NULL;
5204 il->timestamp = 0;
5205
5206 spin_unlock_irqrestore(&il->lock, flags);
5207
5208 il_scan_cancel_timeout(il, 100);
5209 if (!il_is_ready_rf(il)) {
5210 D_MAC80211("leave - not ready\n");
5211 mutex_unlock(&il->mutex);
5212 return;
5213 }
5214
5215 /* we are restarting association process */
5216 il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5217 il_commit_rxon(il);
5218
5219 il_set_rate(il);
5220
5221 D_MAC80211("leave\n");
5222 mutex_unlock(&il->mutex);
5223 }
5224 EXPORT_SYMBOL(il_mac_reset_tsf);
5225
5226 static void
5227 il_ht_conf(struct il_priv *il, struct ieee80211_vif *vif)
5228 {
5229 struct il_ht_config *ht_conf = &il->current_ht_config;
5230 struct ieee80211_sta *sta;
5231 struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;
5232
5233 D_ASSOC("enter:\n");
5234
5235 if (!il->ht.enabled)
5236 return;
5237
5238 il->ht.protection =
5239 bss_conf->ht_operation_mode & IEEE80211_HT_OP_MODE_PROTECTION;
5240 il->ht.non_gf_sta_present =
5241 !!(bss_conf->
5242 ht_operation_mode & IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
5243
5244 ht_conf->single_chain_sufficient = false;
5245
5246 switch (vif->type) {
5247 case NL80211_IFTYPE_STATION:
5248 rcu_read_lock();
5249 sta = ieee80211_find_sta(vif, bss_conf->bssid);
5250 if (sta) {
5251 struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
5252 int maxstreams;
5253
5254 maxstreams =
5255 (ht_cap->mcs.
5256 tx_params & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
5257 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT;
5258 maxstreams += 1;
5259
5260 if (ht_cap->mcs.rx_mask[1] == 0 &&
5261 ht_cap->mcs.rx_mask[2] == 0)
5262 ht_conf->single_chain_sufficient = true;
5263 if (maxstreams <= 1)
5264 ht_conf->single_chain_sufficient = true;
5265 } else {
5266 /*
5267 * If at all, this can only happen through a race
5268 * when the AP disconnects us while we're still
5269 * setting up the connection, in that case mac80211
5270 * will soon tell us about that.
5271 */
5272 ht_conf->single_chain_sufficient = true;
5273 }
5274 rcu_read_unlock();
5275 break;
5276 case NL80211_IFTYPE_ADHOC:
5277 ht_conf->single_chain_sufficient = true;
5278 break;
5279 default:
5280 break;
5281 }
5282
5283 D_ASSOC("leave\n");
5284 }
5285
5286 static inline void
5287 il_set_no_assoc(struct il_priv *il, struct ieee80211_vif *vif)
5288 {
5289 /*
5290 * inform the ucode that there is no longer an
5291 * association and that no more packets should be
5292 * sent
5293 */
5294 il->staging.filter_flags &= ~RXON_FILTER_ASSOC_MSK;
5295 il->staging.assoc_id = 0;
5296 il_commit_rxon(il);
5297 }
5298
5299 static void
5300 il_beacon_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
5301 {
5302 struct il_priv *il = hw->priv;
5303 unsigned long flags;
5304 __le64 timestamp;
5305 struct sk_buff *skb = ieee80211_beacon_get(hw, vif);
5306
5307 if (!skb)
5308 return;
5309
5310 D_MAC80211("enter\n");
5311
5312 lockdep_assert_held(&il->mutex);
5313
5314 if (!il->beacon_enabled) {
5315 IL_ERR("update beacon with no beaconing enabled\n");
5316 dev_kfree_skb(skb);
5317 return;
5318 }
5319
5320 spin_lock_irqsave(&il->lock, flags);
5321
5322 if (il->beacon_skb)
5323 dev_kfree_skb(il->beacon_skb);
5324
5325 il->beacon_skb = skb;
5326
5327 timestamp = ((struct ieee80211_mgmt *)skb->data)->u.beacon.timestamp;
5328 il->timestamp = le64_to_cpu(timestamp);
5329
5330 D_MAC80211("leave\n");
5331 spin_unlock_irqrestore(&il->lock, flags);
5332
5333 if (!il_is_ready_rf(il)) {
5334 D_MAC80211("leave - RF not ready\n");
5335 return;
5336 }
5337
5338 il->ops->post_associate(il);
5339 }
5340
5341 void
5342 il_mac_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
5343 struct ieee80211_bss_conf *bss_conf, u32 changes)
5344 {
5345 struct il_priv *il = hw->priv;
5346 int ret;
5347
5348 mutex_lock(&il->mutex);
5349 D_MAC80211("enter: changes 0x%x\n", changes);
5350
5351 if (!il_is_alive(il)) {
5352 D_MAC80211("leave - not alive\n");
5353 mutex_unlock(&il->mutex);
5354 return;
5355 }
5356
5357 if (changes & BSS_CHANGED_QOS) {
5358 unsigned long flags;
5359
5360 spin_lock_irqsave(&il->lock, flags);
5361 il->qos_data.qos_active = bss_conf->qos;
5362 il_update_qos(il);
5363 spin_unlock_irqrestore(&il->lock, flags);
5364 }
5365
5366 if (changes & BSS_CHANGED_BEACON_ENABLED) {
5367 /* FIXME: can we remove beacon_enabled ? */
5368 if (vif->bss_conf.enable_beacon)
5369 il->beacon_enabled = true;
5370 else
5371 il->beacon_enabled = false;
5372 }
5373
5374 if (changes & BSS_CHANGED_BSSID) {
5375 D_MAC80211("BSSID %pM\n", bss_conf->bssid);
5376
5377 /*
5378 * On passive channel we wait with blocked queues to see if
5379 * there is traffic on that channel. If no frame will be
5380 * received (what is very unlikely since scan detects AP on
5381 * that channel, but theoretically possible), mac80211 associate
5382 * procedure will time out and mac80211 will call us with NULL
5383 * bssid. We have to unblock queues on such condition.
5384 */
5385 if (is_zero_ether_addr(bss_conf->bssid))
5386 il_wake_queues_by_reason(il, IL_STOP_REASON_PASSIVE);
5387
5388 /*
5389 * If there is currently a HW scan going on in the background,
5390 * then we need to cancel it, otherwise sometimes we are not
5391 * able to authenticate (FIXME: why ?)
5392 */
5393 if (il_scan_cancel_timeout(il, 100)) {
5394 D_MAC80211("leave - scan abort failed\n");
5395 mutex_unlock(&il->mutex);
5396 return;
5397 }
5398
5399 /* mac80211 only sets assoc when in STATION mode */
5400 memcpy(il->staging.bssid_addr, bss_conf->bssid, ETH_ALEN);
5401
5402 /* FIXME: currently needed in a few places */
5403 memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5404 }
5405
5406 /*
5407 * This needs to be after setting the BSSID in case
5408 * mac80211 decides to do both changes at once because
5409 * it will invoke post_associate.
5410 */
5411 if (vif->type == NL80211_IFTYPE_ADHOC && (changes & BSS_CHANGED_BEACON))
5412 il_beacon_update(hw, vif);
5413
5414 if (changes & BSS_CHANGED_ERP_PREAMBLE) {
5415 D_MAC80211("ERP_PREAMBLE %d\n", bss_conf->use_short_preamble);
5416 if (bss_conf->use_short_preamble)
5417 il->staging.flags |= RXON_FLG_SHORT_PREAMBLE_MSK;
5418 else
5419 il->staging.flags &= ~RXON_FLG_SHORT_PREAMBLE_MSK;
5420 }
5421
5422 if (changes & BSS_CHANGED_ERP_CTS_PROT) {
5423 D_MAC80211("ERP_CTS %d\n", bss_conf->use_cts_prot);
5424 if (bss_conf->use_cts_prot && il->band != NL80211_BAND_5GHZ)
5425 il->staging.flags |= RXON_FLG_TGG_PROTECT_MSK;
5426 else
5427 il->staging.flags &= ~RXON_FLG_TGG_PROTECT_MSK;
5428 if (bss_conf->use_cts_prot)
5429 il->staging.flags |= RXON_FLG_SELF_CTS_EN;
5430 else
5431 il->staging.flags &= ~RXON_FLG_SELF_CTS_EN;
5432 }
5433
5434 if (changes & BSS_CHANGED_BASIC_RATES) {
5435 /* XXX use this information
5436 *
5437 * To do that, remove code from il_set_rate() and put something
5438 * like this here:
5439 *
5440 if (A-band)
5441 il->staging.ofdm_basic_rates =
5442 bss_conf->basic_rates;
5443 else
5444 il->staging.ofdm_basic_rates =
5445 bss_conf->basic_rates >> 4;
5446 il->staging.cck_basic_rates =
5447 bss_conf->basic_rates & 0xF;
5448 */
5449 }
5450
5451 if (changes & BSS_CHANGED_HT) {
5452 il_ht_conf(il, vif);
5453
5454 if (il->ops->set_rxon_chain)
5455 il->ops->set_rxon_chain(il);
5456 }
5457
5458 if (changes & BSS_CHANGED_ASSOC) {
5459 D_MAC80211("ASSOC %d\n", bss_conf->assoc);
5460 if (bss_conf->assoc) {
5461 il->timestamp = bss_conf->sync_tsf;
5462
5463 if (!il_is_rfkill(il))
5464 il->ops->post_associate(il);
5465 } else
5466 il_set_no_assoc(il, vif);
5467 }
5468
5469 if (changes && il_is_associated(il) && bss_conf->aid) {
5470 D_MAC80211("Changes (%#x) while associated\n", changes);
5471 ret = il_send_rxon_assoc(il);
5472 if (!ret) {
5473 /* Sync active_rxon with latest change. */
5474 memcpy((void *)&il->active, &il->staging,
5475 sizeof(struct il_rxon_cmd));
5476 }
5477 }
5478
5479 if (changes & BSS_CHANGED_BEACON_ENABLED) {
5480 if (vif->bss_conf.enable_beacon) {
5481 memcpy(il->staging.bssid_addr, bss_conf->bssid,
5482 ETH_ALEN);
5483 memcpy(il->bssid, bss_conf->bssid, ETH_ALEN);
5484 il->ops->config_ap(il);
5485 } else
5486 il_set_no_assoc(il, vif);
5487 }
5488
5489 if (changes & BSS_CHANGED_IBSS) {
5490 ret = il->ops->manage_ibss_station(il, vif,
5491 bss_conf->ibss_joined);
5492 if (ret)
5493 IL_ERR("failed to %s IBSS station %pM\n",
5494 bss_conf->ibss_joined ? "add" : "remove",
5495 bss_conf->bssid);
5496 }
5497
5498 D_MAC80211("leave\n");
5499 mutex_unlock(&il->mutex);
5500 }
5501 EXPORT_SYMBOL(il_mac_bss_info_changed);
5502
5503 irqreturn_t
5504 il_isr(int irq, void *data)
5505 {
5506 struct il_priv *il = data;
5507 u32 inta, inta_mask;
5508 u32 inta_fh;
5509 unsigned long flags;
5510 if (!il)
5511 return IRQ_NONE;
5512
5513 spin_lock_irqsave(&il->lock, flags);
5514
5515 /* Disable (but don't clear!) interrupts here to avoid
5516 * back-to-back ISRs and sporadic interrupts from our NIC.
5517 * If we have something to service, the tasklet will re-enable ints.
5518 * If we *don't* have something, we'll re-enable before leaving here. */
5519 inta_mask = _il_rd(il, CSR_INT_MASK); /* just for debug */
5520 _il_wr(il, CSR_INT_MASK, 0x00000000);
5521
5522 /* Discover which interrupts are active/pending */
5523 inta = _il_rd(il, CSR_INT);
5524 inta_fh = _il_rd(il, CSR_FH_INT_STATUS);
5525
5526 /* Ignore interrupt if there's nothing in NIC to service.
5527 * This may be due to IRQ shared with another device,
5528 * or due to sporadic interrupts thrown from our NIC. */
5529 if (!inta && !inta_fh) {
5530 D_ISR("Ignore interrupt, inta == 0, inta_fh == 0\n");
5531 goto none;
5532 }
5533
5534 if (inta == 0xFFFFFFFF || (inta & 0xFFFFFFF0) == 0xa5a5a5a0) {
5535 /* Hardware disappeared. It might have already raised
5536 * an interrupt */
5537 IL_WARN("HARDWARE GONE?? INTA == 0x%08x\n", inta);
5538 goto unplugged;
5539 }
5540
5541 D_ISR("ISR inta 0x%08x, enabled 0x%08x, fh 0x%08x\n", inta, inta_mask,
5542 inta_fh);
5543
5544 inta &= ~CSR_INT_BIT_SCD;
5545
5546 /* il_irq_tasklet() will service interrupts and re-enable them */
5547 if (likely(inta || inta_fh))
5548 tasklet_schedule(&il->irq_tasklet);
5549
5550 unplugged:
5551 spin_unlock_irqrestore(&il->lock, flags);
5552 return IRQ_HANDLED;
5553
5554 none:
5555 /* re-enable interrupts here since we don't have anything to service. */
5556 /* only Re-enable if disabled by irq */
5557 if (test_bit(S_INT_ENABLED, &il->status))
5558 il_enable_interrupts(il);
5559 spin_unlock_irqrestore(&il->lock, flags);
5560 return IRQ_NONE;
5561 }
5562 EXPORT_SYMBOL(il_isr);
5563
5564 /*
5565 * il_tx_cmd_protection: Set rts/cts. 3945 and 4965 only share this
5566 * function.
5567 */
5568 void
5569 il_tx_cmd_protection(struct il_priv *il, struct ieee80211_tx_info *info,
5570 __le16 fc, __le32 *tx_flags)
5571 {
5572 if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
5573 *tx_flags |= TX_CMD_FLG_RTS_MSK;
5574 *tx_flags &= ~TX_CMD_FLG_CTS_MSK;
5575 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5576
5577 if (!ieee80211_is_mgmt(fc))
5578 return;
5579
5580 switch (fc & cpu_to_le16(IEEE80211_FCTL_STYPE)) {
5581 case cpu_to_le16(IEEE80211_STYPE_AUTH):
5582 case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
5583 case cpu_to_le16(IEEE80211_STYPE_ASSOC_REQ):
5584 case cpu_to_le16(IEEE80211_STYPE_REASSOC_REQ):
5585 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5586 *tx_flags |= TX_CMD_FLG_CTS_MSK;
5587 break;
5588 }
5589 } else if (info->control.rates[0].
5590 flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
5591 *tx_flags &= ~TX_CMD_FLG_RTS_MSK;
5592 *tx_flags |= TX_CMD_FLG_CTS_MSK;
5593 *tx_flags |= TX_CMD_FLG_FULL_TXOP_PROT_MSK;
5594 }
5595 }
5596 EXPORT_SYMBOL(il_tx_cmd_protection);
CRIS linux kernel tree